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Use dynamic text relocs for protected vars
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2015 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37 #include "dwarf2.h"
38 #include "elf-linux-psinfo.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 bfd_elf_generic_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 bfd_elf_generic_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 bfd_elf_generic_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_addr16_ha_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 bfd_elf_generic_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 bfd_elf_generic_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 bfd_elf_generic_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 bfd_elf_generic_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 bfd_elf_generic_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 bfd_elf_generic_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 bfd_elf_generic_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_addr16_ha_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 bfd_elf_generic_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_addr16_ha_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_addr16_ha_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 bfd_elf_generic_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 bfd_elf_generic_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 bfd_elf_generic_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f007ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 bfd_elf_generic_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x1f07ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 bfd_elf_generic_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f007ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 bfd_elf_generic_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x1f07ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 bfd_elf_generic_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f007ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 bfd_elf_generic_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x1f07ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 bfd_elf_generic_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 bfd_elf_generic_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f007ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 bfd_elf_generic_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x1f07ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 bfd_elf_generic_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f007ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 bfd_elf_generic_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x1f07ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 bfd_elf_generic_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f007ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 bfd_elf_generic_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x1f07ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 bfd_elf_generic_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* GNU extension to record C++ vtable hierarchy. */
1735 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1736 0, /* rightshift */
1737 0, /* size (0 = byte, 1 = short, 2 = long) */
1738 0, /* bitsize */
1739 FALSE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_dont, /* complain_on_overflow */
1742 NULL, /* special_function */
1743 "R_PPC_GNU_VTINHERIT", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0, /* dst_mask */
1747 FALSE), /* pcrel_offset */
1748
1749 /* GNU extension to record C++ vtable member usage. */
1750 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1751 0, /* rightshift */
1752 0, /* size (0 = byte, 1 = short, 2 = long) */
1753 0, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_dont, /* complain_on_overflow */
1757 NULL, /* special_function */
1758 "R_PPC_GNU_VTENTRY", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* Phony reloc to handle AIX style TOC entries. */
1765 HOWTO (R_PPC_TOC16, /* type */
1766 0, /* rightshift */
1767 1, /* size (0 = byte, 1 = short, 2 = long) */
1768 16, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_signed, /* complain_on_overflow */
1772 bfd_elf_generic_reloc, /* special_function */
1773 "R_PPC_TOC16", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0xffff, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778 };
1779
1780 /* External 32-bit PPC structure for PRPSINFO. This structure is
1781 ABI-defined, thus we choose to use char arrays here in order to
1782 avoid dealing with different types in different architectures.
1783
1784 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1785 most non-PPC architectures use `short int'.
1786
1787 This structure will ultimately be written in the corefile's note
1788 section, as the PRPSINFO. */
1789
1790 struct elf_external_ppc_linux_prpsinfo32
1791 {
1792 char pr_state; /* Numeric process state. */
1793 char pr_sname; /* Char for pr_state. */
1794 char pr_zomb; /* Zombie. */
1795 char pr_nice; /* Nice val. */
1796 char pr_flag[4]; /* Flags. */
1797 char pr_uid[4];
1798 char pr_gid[4];
1799 char pr_pid[4];
1800 char pr_ppid[4];
1801 char pr_pgrp[4];
1802 char pr_sid[4];
1803 char pr_fname[16]; /* Filename of executable. */
1804 char pr_psargs[80]; /* Initial part of arg list. */
1805 };
1806
1807 /* Helper macro to swap (properly handling endianess) things from the
1808 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32'
1809 structure.
1810
1811 Note that FROM should be a pointer, and TO should be the explicit type. */
1812
1813 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \
1814 do \
1815 { \
1816 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \
1817 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \
1818 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \
1819 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \
1820 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \
1821 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \
1822 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \
1823 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \
1824 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \
1825 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \
1826 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \
1827 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \
1828 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \
1829 } while (0)
1830
1831 \f
1832 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1833
1834 static void
1835 ppc_elf_howto_init (void)
1836 {
1837 unsigned int i, type;
1838
1839 for (i = 0;
1840 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1841 i++)
1842 {
1843 type = ppc_elf_howto_raw[i].type;
1844 if (type >= (sizeof (ppc_elf_howto_table)
1845 / sizeof (ppc_elf_howto_table[0])))
1846 abort ();
1847 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1848 }
1849 }
1850
1851 static reloc_howto_type *
1852 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1853 bfd_reloc_code_real_type code)
1854 {
1855 enum elf_ppc_reloc_type r;
1856
1857 /* Initialize howto table if not already done. */
1858 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1859 ppc_elf_howto_init ();
1860
1861 switch (code)
1862 {
1863 default:
1864 return NULL;
1865
1866 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1867 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1868 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1869 case BFD_RELOC_PPC64_ADDR16_DS:
1870 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1871 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1872 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1873 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1874 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1875 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1876 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1877 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1878 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1879 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1880 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1881 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1882 case BFD_RELOC_PPC64_GOT16_DS:
1883 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1884 case BFD_RELOC_PPC64_GOT16_LO_DS:
1885 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1886 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1887 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1888 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1889 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1890 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1891 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1892 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1893 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1894 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1895 case BFD_RELOC_PPC64_PLT16_LO_DS:
1896 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1897 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1898 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1899 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1900 case BFD_RELOC_PPC64_SECTOFF_DS:
1901 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1902 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1903 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1904 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1905 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1906 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1907 case BFD_RELOC_PPC64_TOC16_DS:
1908 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1909 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1910 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1911 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1912 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1913 case BFD_RELOC_PPC64_TPREL16_DS:
1914 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1915 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1916 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1917 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1918 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1919 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1920 case BFD_RELOC_PPC64_DTPREL16_DS:
1921 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1922 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1923 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1924 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1925 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1926 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1927 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1928 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1929 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1930 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1931 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1932 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1933 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1934 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1935 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1936 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1937 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1938 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1939 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1940 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1941 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1942 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1943 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1944 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1945 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1946 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1947 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1948 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1949 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1950 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1951 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1952 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1953 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1954 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1955 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1956 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1957 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1958 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1959 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1960 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1961 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1962 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1963 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1964 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1965 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1966 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1967 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1968 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1969 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1970 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1971 r = R_PPC_VLE_SDAREL_LO16A;
1972 break;
1973 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1974 r = R_PPC_VLE_SDAREL_LO16D;
1975 break;
1976 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1977 r = R_PPC_VLE_SDAREL_HI16A;
1978 break;
1979 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1980 r = R_PPC_VLE_SDAREL_HI16D;
1981 break;
1982 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1983 r = R_PPC_VLE_SDAREL_HA16A;
1984 break;
1985 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1986 r = R_PPC_VLE_SDAREL_HA16D;
1987 break;
1988 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1989 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1990 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1991 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1992 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1993 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1994 }
1995
1996 return ppc_elf_howto_table[r];
1997 };
1998
1999 static reloc_howto_type *
2000 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2001 const char *r_name)
2002 {
2003 unsigned int i;
2004
2005 for (i = 0;
2006 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2007 i++)
2008 if (ppc_elf_howto_raw[i].name != NULL
2009 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2010 return &ppc_elf_howto_raw[i];
2011
2012 return NULL;
2013 }
2014
2015 /* Set the howto pointer for a PowerPC ELF reloc. */
2016
2017 static void
2018 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2019 arelent *cache_ptr,
2020 Elf_Internal_Rela *dst)
2021 {
2022 unsigned int r_type;
2023
2024 /* Initialize howto table if not already done. */
2025 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2026 ppc_elf_howto_init ();
2027
2028 r_type = ELF32_R_TYPE (dst->r_info);
2029 if (r_type >= R_PPC_max)
2030 {
2031 (*_bfd_error_handler) (_("%B: unrecognised PPC reloc number: %d"),
2032 abfd, r_type);
2033 bfd_set_error (bfd_error_bad_value);
2034 r_type = R_PPC_NONE;
2035 }
2036 cache_ptr->howto = ppc_elf_howto_table[r_type];
2037
2038 /* Just because the above assert didn't trigger doesn't mean that
2039 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2040 if (!cache_ptr->howto)
2041 {
2042 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2043 abfd, r_type);
2044 bfd_set_error (bfd_error_bad_value);
2045
2046 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2047 }
2048 }
2049
2050 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2051
2052 static bfd_reloc_status_type
2053 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2054 arelent *reloc_entry,
2055 asymbol *symbol,
2056 void *data ATTRIBUTE_UNUSED,
2057 asection *input_section,
2058 bfd *output_bfd,
2059 char **error_message ATTRIBUTE_UNUSED)
2060 {
2061 bfd_vma relocation;
2062
2063 if (output_bfd != NULL)
2064 {
2065 reloc_entry->address += input_section->output_offset;
2066 return bfd_reloc_ok;
2067 }
2068
2069 if (bfd_is_com_section (symbol->section))
2070 relocation = 0;
2071 else
2072 relocation = symbol->value;
2073
2074 relocation += symbol->section->output_section->vma;
2075 relocation += symbol->section->output_offset;
2076 relocation += reloc_entry->addend;
2077 if (reloc_entry->howto->pc_relative)
2078 relocation -= reloc_entry->address;
2079
2080 reloc_entry->addend += (relocation & 0x8000) << 1;
2081
2082 return bfd_reloc_continue;
2083 }
2084
2085 static bfd_reloc_status_type
2086 ppc_elf_unhandled_reloc (bfd *abfd,
2087 arelent *reloc_entry,
2088 asymbol *symbol,
2089 void *data,
2090 asection *input_section,
2091 bfd *output_bfd,
2092 char **error_message)
2093 {
2094 /* If this is a relocatable link (output_bfd test tells us), just
2095 call the generic function. Any adjustment will be done at final
2096 link time. */
2097 if (output_bfd != NULL)
2098 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2099 input_section, output_bfd, error_message);
2100
2101 if (error_message != NULL)
2102 {
2103 static char buf[60];
2104 sprintf (buf, _("generic linker can't handle %s"),
2105 reloc_entry->howto->name);
2106 *error_message = buf;
2107 }
2108 return bfd_reloc_dangerous;
2109 }
2110 \f
2111 /* Sections created by the linker. */
2112
2113 typedef struct elf_linker_section
2114 {
2115 /* Pointer to the bfd section. */
2116 asection *section;
2117 /* Section name. */
2118 const char *name;
2119 /* Associated bss section name. */
2120 const char *bss_name;
2121 /* Associated symbol name. */
2122 const char *sym_name;
2123 /* Associated symbol. */
2124 struct elf_link_hash_entry *sym;
2125 } elf_linker_section_t;
2126
2127 /* Linked list of allocated pointer entries. This hangs off of the
2128 symbol lists, and provides allows us to return different pointers,
2129 based on different addend's. */
2130
2131 typedef struct elf_linker_section_pointers
2132 {
2133 /* next allocated pointer for this symbol */
2134 struct elf_linker_section_pointers *next;
2135 /* offset of pointer from beginning of section */
2136 bfd_vma offset;
2137 /* addend used */
2138 bfd_vma addend;
2139 /* which linker section this is */
2140 elf_linker_section_t *lsect;
2141 } elf_linker_section_pointers_t;
2142
2143 struct ppc_elf_obj_tdata
2144 {
2145 struct elf_obj_tdata elf;
2146
2147 /* A mapping from local symbols to offsets into the various linker
2148 sections added. This is index by the symbol index. */
2149 elf_linker_section_pointers_t **linker_section_pointers;
2150
2151 /* Flags used to auto-detect plt type. */
2152 unsigned int makes_plt_call : 1;
2153 unsigned int has_rel16 : 1;
2154 };
2155
2156 #define ppc_elf_tdata(bfd) \
2157 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2158
2159 #define elf_local_ptr_offsets(bfd) \
2160 (ppc_elf_tdata (bfd)->linker_section_pointers)
2161
2162 #define is_ppc_elf(bfd) \
2163 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2164 && elf_object_id (bfd) == PPC32_ELF_DATA)
2165
2166 /* Override the generic function because we store some extras. */
2167
2168 static bfd_boolean
2169 ppc_elf_mkobject (bfd *abfd)
2170 {
2171 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2172 PPC32_ELF_DATA);
2173 }
2174
2175 /* Fix bad default arch selected for a 32 bit input bfd when the
2176 default is 64 bit. */
2177
2178 static bfd_boolean
2179 ppc_elf_object_p (bfd *abfd)
2180 {
2181 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2182 {
2183 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2184
2185 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2186 {
2187 /* Relies on arch after 64 bit default being 32 bit default. */
2188 abfd->arch_info = abfd->arch_info->next;
2189 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2190 }
2191 }
2192 return TRUE;
2193 }
2194
2195 /* Function to set whether a module needs the -mrelocatable bit set. */
2196
2197 static bfd_boolean
2198 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2199 {
2200 BFD_ASSERT (!elf_flags_init (abfd)
2201 || elf_elfheader (abfd)->e_flags == flags);
2202
2203 elf_elfheader (abfd)->e_flags = flags;
2204 elf_flags_init (abfd) = TRUE;
2205 return TRUE;
2206 }
2207
2208 /* Support for core dump NOTE sections. */
2209
2210 static bfd_boolean
2211 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2212 {
2213 int offset;
2214 unsigned int size;
2215
2216 switch (note->descsz)
2217 {
2218 default:
2219 return FALSE;
2220
2221 case 268: /* Linux/PPC. */
2222 /* pr_cursig */
2223 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2224
2225 /* pr_pid */
2226 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2227
2228 /* pr_reg */
2229 offset = 72;
2230 size = 192;
2231
2232 break;
2233 }
2234
2235 /* Make a ".reg/999" section. */
2236 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2237 size, note->descpos + offset);
2238 }
2239
2240 static bfd_boolean
2241 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2242 {
2243 switch (note->descsz)
2244 {
2245 default:
2246 return FALSE;
2247
2248 case 128: /* Linux/PPC elf_prpsinfo. */
2249 elf_tdata (abfd)->core->pid
2250 = bfd_get_32 (abfd, note->descdata + 16);
2251 elf_tdata (abfd)->core->program
2252 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2253 elf_tdata (abfd)->core->command
2254 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2255 }
2256
2257 /* Note that for some reason, a spurious space is tacked
2258 onto the end of the args in some (at least one anyway)
2259 implementations, so strip it off if it exists. */
2260
2261 {
2262 char *command = elf_tdata (abfd)->core->command;
2263 int n = strlen (command);
2264
2265 if (0 < n && command[n - 1] == ' ')
2266 command[n - 1] = '\0';
2267 }
2268
2269 return TRUE;
2270 }
2271
2272 char *
2273 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2274 const struct elf_internal_linux_prpsinfo *prpsinfo)
2275 {
2276 struct elf_external_ppc_linux_prpsinfo32 data;
2277
2278 memset (&data, 0, sizeof (data));
2279 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2280
2281 return elfcore_write_note (abfd, buf, bufsiz,
2282 "CORE", NT_PRPSINFO, &data, sizeof (data));
2283 }
2284
2285 static char *
2286 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2287 {
2288 switch (note_type)
2289 {
2290 default:
2291 return NULL;
2292
2293 case NT_PRPSINFO:
2294 {
2295 char data[128];
2296 va_list ap;
2297
2298 va_start (ap, note_type);
2299 memset (data, 0, sizeof (data));
2300 strncpy (data + 32, va_arg (ap, const char *), 16);
2301 strncpy (data + 48, va_arg (ap, const char *), 80);
2302 va_end (ap);
2303 return elfcore_write_note (abfd, buf, bufsiz,
2304 "CORE", note_type, data, sizeof (data));
2305 }
2306
2307 case NT_PRSTATUS:
2308 {
2309 char data[268];
2310 va_list ap;
2311 long pid;
2312 int cursig;
2313 const void *greg;
2314
2315 va_start (ap, note_type);
2316 memset (data, 0, 72);
2317 pid = va_arg (ap, long);
2318 bfd_put_32 (abfd, pid, data + 24);
2319 cursig = va_arg (ap, int);
2320 bfd_put_16 (abfd, cursig, data + 12);
2321 greg = va_arg (ap, const void *);
2322 memcpy (data + 72, greg, 192);
2323 memset (data + 264, 0, 4);
2324 va_end (ap);
2325 return elfcore_write_note (abfd, buf, bufsiz,
2326 "CORE", note_type, data, sizeof (data));
2327 }
2328 }
2329 }
2330
2331 static flagword
2332 ppc_elf_lookup_section_flags (char *flag_name)
2333 {
2334
2335 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2336 return SHF_PPC_VLE;
2337
2338 return 0;
2339 }
2340
2341 /* Add the VLE flag if required. */
2342
2343 bfd_boolean
2344 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2345 {
2346 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2347 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2348 shdr->sh_flags |= SHF_PPC_VLE;
2349
2350 return TRUE;
2351 }
2352
2353 /* Return address for Ith PLT stub in section PLT, for relocation REL
2354 or (bfd_vma) -1 if it should not be included. */
2355
2356 static bfd_vma
2357 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2358 const asection *plt ATTRIBUTE_UNUSED,
2359 const arelent *rel)
2360 {
2361 return rel->address;
2362 }
2363
2364 /* Handle a PowerPC specific section when reading an object file. This
2365 is called when bfd_section_from_shdr finds a section with an unknown
2366 type. */
2367
2368 static bfd_boolean
2369 ppc_elf_section_from_shdr (bfd *abfd,
2370 Elf_Internal_Shdr *hdr,
2371 const char *name,
2372 int shindex)
2373 {
2374 asection *newsect;
2375 flagword flags;
2376
2377 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2378 return FALSE;
2379
2380 newsect = hdr->bfd_section;
2381 flags = bfd_get_section_flags (abfd, newsect);
2382 if (hdr->sh_flags & SHF_EXCLUDE)
2383 flags |= SEC_EXCLUDE;
2384
2385 if (hdr->sh_type == SHT_ORDERED)
2386 flags |= SEC_SORT_ENTRIES;
2387
2388 bfd_set_section_flags (abfd, newsect, flags);
2389 return TRUE;
2390 }
2391
2392 /* Set up any other section flags and such that may be necessary. */
2393
2394 static bfd_boolean
2395 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2396 Elf_Internal_Shdr *shdr,
2397 asection *asect)
2398 {
2399 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2400 shdr->sh_type = SHT_ORDERED;
2401
2402 return TRUE;
2403 }
2404
2405 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2406 need to bump up the number of section headers. */
2407
2408 static int
2409 ppc_elf_additional_program_headers (bfd *abfd,
2410 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2411 {
2412 asection *s;
2413 int ret = 0;
2414
2415 s = bfd_get_section_by_name (abfd, ".sbss2");
2416 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2417 ++ret;
2418
2419 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2420 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2421 ++ret;
2422
2423 return ret;
2424 }
2425
2426 /* Modify the segment map for VLE executables. */
2427
2428 bfd_boolean
2429 ppc_elf_modify_segment_map (bfd *abfd,
2430 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2431 {
2432 struct elf_segment_map *m, *n;
2433 bfd_size_type amt;
2434 unsigned int j, k;
2435 bfd_boolean sect0_vle, sectj_vle;
2436
2437 /* At this point in the link, output sections have already been sorted by
2438 LMA and assigned to segments. All that is left to do is to ensure
2439 there is no mixing of VLE & non-VLE sections in a text segment.
2440 If we find that case, we split the segment.
2441 We maintain the original output section order. */
2442
2443 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2444 {
2445 if (m->count == 0)
2446 continue;
2447
2448 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2449 for (j = 1; j < m->count; ++j)
2450 {
2451 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2452
2453 if (sectj_vle != sect0_vle)
2454 break;
2455 }
2456 if (j >= m->count)
2457 continue;
2458
2459 /* sections 0..j-1 stay in this (current) segment,
2460 the remainder are put in a new segment.
2461 The scan resumes with the new segment. */
2462
2463 /* Fix the new segment. */
2464 amt = sizeof (struct elf_segment_map);
2465 amt += (m->count - j - 1) * sizeof (asection *);
2466 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2467 if (n == NULL)
2468 return FALSE;
2469
2470 n->p_type = PT_LOAD;
2471 n->p_flags = PF_X | PF_R;
2472 if (sectj_vle)
2473 n->p_flags |= PF_PPC_VLE;
2474 n->count = m->count - j;
2475 for (k = 0; k < n->count; ++k)
2476 {
2477 n->sections[k] = m->sections[j+k];
2478 m->sections[j+k] = NULL;
2479 }
2480 n->next = m->next;
2481 m->next = n;
2482
2483 /* Fix the current segment */
2484 m->count = j;
2485 }
2486
2487 return TRUE;
2488 }
2489
2490 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2491 .PPC.EMB.sbss0 a normal section, and not a bss section so
2492 that the linker doesn't crater when trying to make more than
2493 2 sections. */
2494
2495 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2496 {
2497 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2498 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2499 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2500 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2501 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2502 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2503 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2504 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2505 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2506 { NULL, 0, 0, 0, 0 }
2507 };
2508
2509 /* This is what we want for new plt/got. */
2510 static struct bfd_elf_special_section ppc_alt_plt =
2511 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2512
2513 static const struct bfd_elf_special_section *
2514 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2515 {
2516 const struct bfd_elf_special_section *ssect;
2517
2518 /* See if this is one of the special sections. */
2519 if (sec->name == NULL)
2520 return NULL;
2521
2522 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2523 sec->use_rela_p);
2524 if (ssect != NULL)
2525 {
2526 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2527 ssect = &ppc_alt_plt;
2528 return ssect;
2529 }
2530
2531 return _bfd_elf_get_sec_type_attr (abfd, sec);
2532 }
2533 \f
2534 /* Very simple linked list structure for recording apuinfo values. */
2535 typedef struct apuinfo_list
2536 {
2537 struct apuinfo_list *next;
2538 unsigned long value;
2539 }
2540 apuinfo_list;
2541
2542 static apuinfo_list *head;
2543 static bfd_boolean apuinfo_set;
2544
2545 static void
2546 apuinfo_list_init (void)
2547 {
2548 head = NULL;
2549 apuinfo_set = FALSE;
2550 }
2551
2552 static void
2553 apuinfo_list_add (unsigned long value)
2554 {
2555 apuinfo_list *entry = head;
2556
2557 while (entry != NULL)
2558 {
2559 if (entry->value == value)
2560 return;
2561 entry = entry->next;
2562 }
2563
2564 entry = bfd_malloc (sizeof (* entry));
2565 if (entry == NULL)
2566 return;
2567
2568 entry->value = value;
2569 entry->next = head;
2570 head = entry;
2571 }
2572
2573 static unsigned
2574 apuinfo_list_length (void)
2575 {
2576 apuinfo_list *entry;
2577 unsigned long count;
2578
2579 for (entry = head, count = 0;
2580 entry;
2581 entry = entry->next)
2582 ++ count;
2583
2584 return count;
2585 }
2586
2587 static inline unsigned long
2588 apuinfo_list_element (unsigned long number)
2589 {
2590 apuinfo_list * entry;
2591
2592 for (entry = head;
2593 entry && number --;
2594 entry = entry->next)
2595 ;
2596
2597 return entry ? entry->value : 0;
2598 }
2599
2600 static void
2601 apuinfo_list_finish (void)
2602 {
2603 apuinfo_list *entry;
2604
2605 for (entry = head; entry;)
2606 {
2607 apuinfo_list *next = entry->next;
2608 free (entry);
2609 entry = next;
2610 }
2611
2612 head = NULL;
2613 }
2614
2615 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2616 #define APUINFO_LABEL "APUinfo"
2617
2618 /* Scan the input BFDs and create a linked list of
2619 the APUinfo values that will need to be emitted. */
2620
2621 static void
2622 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2623 {
2624 bfd *ibfd;
2625 asection *asec;
2626 char *buffer = NULL;
2627 bfd_size_type largest_input_size = 0;
2628 unsigned i;
2629 unsigned long length;
2630 const char *error_message = NULL;
2631
2632 if (link_info == NULL)
2633 return;
2634
2635 apuinfo_list_init ();
2636
2637 /* Read in the input sections contents. */
2638 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2639 {
2640 unsigned long datum;
2641
2642 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2643 if (asec == NULL)
2644 continue;
2645
2646 error_message = _("corrupt %s section in %B");
2647 length = asec->size;
2648 if (length < 20)
2649 goto fail;
2650
2651 apuinfo_set = TRUE;
2652 if (largest_input_size < asec->size)
2653 {
2654 if (buffer)
2655 free (buffer);
2656 largest_input_size = asec->size;
2657 buffer = bfd_malloc (largest_input_size);
2658 if (!buffer)
2659 return;
2660 }
2661
2662 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2663 || (bfd_bread (buffer, length, ibfd) != length))
2664 {
2665 error_message = _("unable to read in %s section from %B");
2666 goto fail;
2667 }
2668
2669 /* Verify the contents of the header. Note - we have to
2670 extract the values this way in order to allow for a
2671 host whose endian-ness is different from the target. */
2672 datum = bfd_get_32 (ibfd, buffer);
2673 if (datum != sizeof APUINFO_LABEL)
2674 goto fail;
2675
2676 datum = bfd_get_32 (ibfd, buffer + 8);
2677 if (datum != 0x2)
2678 goto fail;
2679
2680 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2681 goto fail;
2682
2683 /* Get the number of bytes used for apuinfo entries. */
2684 datum = bfd_get_32 (ibfd, buffer + 4);
2685 if (datum + 20 != length)
2686 goto fail;
2687
2688 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2689 for (i = 0; i < datum; i += 4)
2690 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2691 }
2692
2693 error_message = NULL;
2694
2695 if (apuinfo_set)
2696 {
2697 /* Compute the size of the output section. */
2698 unsigned num_entries = apuinfo_list_length ();
2699
2700 /* Set the output section size, if it exists. */
2701 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2702
2703 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2704 {
2705 ibfd = abfd;
2706 error_message = _("warning: unable to set size of %s section in %B");
2707 }
2708 }
2709
2710 fail:
2711 if (buffer)
2712 free (buffer);
2713
2714 if (error_message)
2715 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2716 }
2717
2718 /* Prevent the output section from accumulating the input sections'
2719 contents. We have already stored this in our linked list structure. */
2720
2721 static bfd_boolean
2722 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2723 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2724 asection *asec,
2725 bfd_byte *contents ATTRIBUTE_UNUSED)
2726 {
2727 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2728 }
2729
2730 /* Finally we can generate the output section. */
2731
2732 static void
2733 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2734 {
2735 bfd_byte *buffer;
2736 asection *asec;
2737 unsigned i;
2738 unsigned num_entries;
2739 bfd_size_type length;
2740
2741 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2742 if (asec == NULL)
2743 return;
2744
2745 if (!apuinfo_set)
2746 return;
2747
2748 length = asec->size;
2749 if (length < 20)
2750 return;
2751
2752 buffer = bfd_malloc (length);
2753 if (buffer == NULL)
2754 {
2755 (*_bfd_error_handler)
2756 (_("failed to allocate space for new APUinfo section."));
2757 return;
2758 }
2759
2760 /* Create the apuinfo header. */
2761 num_entries = apuinfo_list_length ();
2762 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2763 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2764 bfd_put_32 (abfd, 0x2, buffer + 8);
2765 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2766
2767 length = 20;
2768 for (i = 0; i < num_entries; i++)
2769 {
2770 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2771 length += 4;
2772 }
2773
2774 if (length != asec->size)
2775 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2776
2777 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2778 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2779
2780 free (buffer);
2781
2782 apuinfo_list_finish ();
2783 }
2784 \f
2785 static bfd_boolean
2786 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2787 {
2788 bfd_byte buf[GLINK_ENTRY_SIZE];
2789
2790 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2791 return FALSE;
2792
2793 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2794 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2795 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2796 && bfd_get_32 (abfd, buf + 12) == BCTR);
2797 }
2798
2799 static bfd_boolean
2800 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2801 {
2802 bfd_vma vma = *(bfd_vma *) ptr;
2803 return ((section->flags & SEC_ALLOC) != 0
2804 && section->vma <= vma
2805 && vma < section->vma + section->size);
2806 }
2807
2808 static long
2809 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2810 long dynsymcount, asymbol **dynsyms,
2811 asymbol **ret)
2812 {
2813 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2814 asection *plt, *relplt, *dynamic, *glink;
2815 bfd_vma glink_vma = 0;
2816 bfd_vma resolv_vma = 0;
2817 bfd_vma stub_vma;
2818 asymbol *s;
2819 arelent *p;
2820 long count, i;
2821 size_t size;
2822 char *names;
2823 bfd_byte buf[4];
2824
2825 *ret = NULL;
2826
2827 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2828 return 0;
2829
2830 if (dynsymcount <= 0)
2831 return 0;
2832
2833 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2834 if (relplt == NULL)
2835 return 0;
2836
2837 plt = bfd_get_section_by_name (abfd, ".plt");
2838 if (plt == NULL)
2839 return 0;
2840
2841 /* Call common code to handle old-style executable PLTs. */
2842 if (elf_section_flags (plt) & SHF_EXECINSTR)
2843 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2844 dynsymcount, dynsyms, ret);
2845
2846 /* If this object was prelinked, the prelinker stored the address
2847 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2848 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2849 if (dynamic != NULL)
2850 {
2851 bfd_byte *dynbuf, *extdyn, *extdynend;
2852 size_t extdynsize;
2853 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2854
2855 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2856 return -1;
2857
2858 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2859 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2860
2861 extdyn = dynbuf;
2862 extdynend = extdyn + dynamic->size;
2863 for (; extdyn < extdynend; extdyn += extdynsize)
2864 {
2865 Elf_Internal_Dyn dyn;
2866 (*swap_dyn_in) (abfd, extdyn, &dyn);
2867
2868 if (dyn.d_tag == DT_NULL)
2869 break;
2870
2871 if (dyn.d_tag == DT_PPC_GOT)
2872 {
2873 unsigned int g_o_t = dyn.d_un.d_val;
2874 asection *got = bfd_get_section_by_name (abfd, ".got");
2875 if (got != NULL
2876 && bfd_get_section_contents (abfd, got, buf,
2877 g_o_t - got->vma + 4, 4))
2878 glink_vma = bfd_get_32 (abfd, buf);
2879 break;
2880 }
2881 }
2882 free (dynbuf);
2883 }
2884
2885 /* Otherwise we read the first plt entry. */
2886 if (glink_vma == 0)
2887 {
2888 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2889 glink_vma = bfd_get_32 (abfd, buf);
2890 }
2891
2892 if (glink_vma == 0)
2893 return 0;
2894
2895 /* The .glink section usually does not survive the final
2896 link; search for the section (usually .text) where the
2897 glink stubs now reside. */
2898 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2899 if (glink == NULL)
2900 return 0;
2901
2902 /* Determine glink PLT resolver by reading the relative branch
2903 from the first glink stub. */
2904 if (bfd_get_section_contents (abfd, glink, buf,
2905 glink_vma - glink->vma, 4))
2906 {
2907 unsigned int insn = bfd_get_32 (abfd, buf);
2908
2909 /* The first glink stub may either branch to the resolver ... */
2910 insn ^= B;
2911 if ((insn & ~0x3fffffc) == 0)
2912 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2913
2914 /* ... or fall through a bunch of NOPs. */
2915 else if ((insn ^ B ^ NOP) == 0)
2916 for (i = 4;
2917 bfd_get_section_contents (abfd, glink, buf,
2918 glink_vma - glink->vma + i, 4);
2919 i += 4)
2920 if (bfd_get_32 (abfd, buf) != NOP)
2921 {
2922 resolv_vma = glink_vma + i;
2923 break;
2924 }
2925 }
2926
2927 count = relplt->size / sizeof (Elf32_External_Rela);
2928 stub_vma = glink_vma - (bfd_vma) count * 16;
2929 /* If the stubs are those for -shared/-pie then we might have
2930 multiple stubs for each plt entry. If that is the case then
2931 there is no way to associate stubs with their plt entries short
2932 of figuring out the GOT pointer value used in the stub. */
2933 if (!is_nonpic_glink_stub (abfd, glink,
2934 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2935 return 0;
2936
2937 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2938 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2939 return -1;
2940
2941 size = count * sizeof (asymbol);
2942 p = relplt->relocation;
2943 for (i = 0; i < count; i++, p++)
2944 {
2945 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2946 if (p->addend != 0)
2947 size += sizeof ("+0x") - 1 + 8;
2948 }
2949
2950 size += sizeof (asymbol) + sizeof ("__glink");
2951
2952 if (resolv_vma)
2953 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2954
2955 s = *ret = bfd_malloc (size);
2956 if (s == NULL)
2957 return -1;
2958
2959 names = (char *) (s + count + 1 + (resolv_vma != 0));
2960 p = relplt->relocation;
2961 for (i = 0; i < count; i++, p++)
2962 {
2963 size_t len;
2964
2965 *s = **p->sym_ptr_ptr;
2966 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2967 we are defining a symbol, ensure one of them is set. */
2968 if ((s->flags & BSF_LOCAL) == 0)
2969 s->flags |= BSF_GLOBAL;
2970 s->flags |= BSF_SYNTHETIC;
2971 s->section = glink;
2972 s->value = stub_vma - glink->vma;
2973 s->name = names;
2974 s->udata.p = NULL;
2975 len = strlen ((*p->sym_ptr_ptr)->name);
2976 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2977 names += len;
2978 if (p->addend != 0)
2979 {
2980 memcpy (names, "+0x", sizeof ("+0x") - 1);
2981 names += sizeof ("+0x") - 1;
2982 bfd_sprintf_vma (abfd, names, p->addend);
2983 names += strlen (names);
2984 }
2985 memcpy (names, "@plt", sizeof ("@plt"));
2986 names += sizeof ("@plt");
2987 ++s;
2988 stub_vma += 16;
2989 }
2990
2991 /* Add a symbol at the start of the glink branch table. */
2992 memset (s, 0, sizeof *s);
2993 s->the_bfd = abfd;
2994 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2995 s->section = glink;
2996 s->value = glink_vma - glink->vma;
2997 s->name = names;
2998 memcpy (names, "__glink", sizeof ("__glink"));
2999 names += sizeof ("__glink");
3000 s++;
3001 count++;
3002
3003 if (resolv_vma)
3004 {
3005 /* Add a symbol for the glink PLT resolver. */
3006 memset (s, 0, sizeof *s);
3007 s->the_bfd = abfd;
3008 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3009 s->section = glink;
3010 s->value = resolv_vma - glink->vma;
3011 s->name = names;
3012 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3013 names += sizeof ("__glink_PLTresolve");
3014 s++;
3015 count++;
3016 }
3017
3018 return count;
3019 }
3020 \f
3021 /* The following functions are specific to the ELF linker, while
3022 functions above are used generally. They appear in this file more
3023 or less in the order in which they are called. eg.
3024 ppc_elf_check_relocs is called early in the link process,
3025 ppc_elf_finish_dynamic_sections is one of the last functions
3026 called. */
3027
3028 /* Track PLT entries needed for a given symbol. We might need more
3029 than one glink entry per symbol when generating a pic binary. */
3030 struct plt_entry
3031 {
3032 struct plt_entry *next;
3033
3034 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3035 This field stores the offset into .got2 used to initialise the
3036 GOT pointer reg. It will always be at least 32768. (Current
3037 gcc always uses an offset of 32768, but ld -r will pack .got2
3038 sections together resulting in larger offsets). */
3039 bfd_vma addend;
3040
3041 /* The .got2 section. */
3042 asection *sec;
3043
3044 /* PLT refcount or offset. */
3045 union
3046 {
3047 bfd_signed_vma refcount;
3048 bfd_vma offset;
3049 } plt;
3050
3051 /* .glink stub offset. */
3052 bfd_vma glink_offset;
3053 };
3054
3055 /* Of those relocs that might be copied as dynamic relocs, this function
3056 selects those that must be copied when linking a shared library,
3057 even when the symbol is local. */
3058
3059 static int
3060 must_be_dyn_reloc (struct bfd_link_info *info,
3061 enum elf_ppc_reloc_type r_type)
3062 {
3063 switch (r_type)
3064 {
3065 default:
3066 return 1;
3067
3068 case R_PPC_REL24:
3069 case R_PPC_REL14:
3070 case R_PPC_REL14_BRTAKEN:
3071 case R_PPC_REL14_BRNTAKEN:
3072 case R_PPC_REL32:
3073 return 0;
3074
3075 case R_PPC_TPREL32:
3076 case R_PPC_TPREL16:
3077 case R_PPC_TPREL16_LO:
3078 case R_PPC_TPREL16_HI:
3079 case R_PPC_TPREL16_HA:
3080 return !info->executable;
3081 }
3082 }
3083
3084 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3085 copying dynamic variables from a shared lib into an app's dynbss
3086 section, and instead use a dynamic relocation to point into the
3087 shared lib. */
3088 #define ELIMINATE_COPY_RELOCS 1
3089
3090 /* Used to track dynamic relocations for local symbols. */
3091 struct ppc_dyn_relocs
3092 {
3093 struct ppc_dyn_relocs *next;
3094
3095 /* The input section of the reloc. */
3096 asection *sec;
3097
3098 /* Total number of relocs copied for the input section. */
3099 unsigned int count : 31;
3100
3101 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3102 unsigned int ifunc : 1;
3103 };
3104
3105 /* PPC ELF linker hash entry. */
3106
3107 struct ppc_elf_link_hash_entry
3108 {
3109 struct elf_link_hash_entry elf;
3110
3111 /* If this symbol is used in the linker created sections, the processor
3112 specific backend uses this field to map the field into the offset
3113 from the beginning of the section. */
3114 elf_linker_section_pointers_t *linker_section_pointer;
3115
3116 /* Track dynamic relocs copied for this symbol. */
3117 struct elf_dyn_relocs *dyn_relocs;
3118
3119 /* Contexts in which symbol is used in the GOT (or TOC).
3120 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3121 corresponding relocs are encountered during check_relocs.
3122 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3123 indicate the corresponding GOT entry type is not needed. */
3124 #define TLS_GD 1 /* GD reloc. */
3125 #define TLS_LD 2 /* LD reloc. */
3126 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3127 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3128 #define TLS_TLS 16 /* Any TLS reloc. */
3129 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3130 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3131 char tls_mask;
3132
3133 /* Nonzero if we have seen a small data relocation referring to this
3134 symbol. */
3135 unsigned char has_sda_refs;
3136 };
3137
3138 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3139
3140 /* PPC ELF linker hash table. */
3141
3142 struct ppc_elf_link_hash_table
3143 {
3144 struct elf_link_hash_table elf;
3145
3146 /* Various options passed from the linker. */
3147 struct ppc_elf_params *params;
3148
3149 /* Short-cuts to get to dynamic linker sections. */
3150 asection *got;
3151 asection *relgot;
3152 asection *glink;
3153 asection *plt;
3154 asection *relplt;
3155 asection *iplt;
3156 asection *reliplt;
3157 asection *dynbss;
3158 asection *relbss;
3159 asection *dynsbss;
3160 asection *relsbss;
3161 elf_linker_section_t sdata[2];
3162 asection *sbss;
3163 asection *glink_eh_frame;
3164
3165 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3166 asection *srelplt2;
3167
3168 /* The .got.plt section (VxWorks only)*/
3169 asection *sgotplt;
3170
3171 /* Shortcut to __tls_get_addr. */
3172 struct elf_link_hash_entry *tls_get_addr;
3173
3174 /* The bfd that forced an old-style PLT. */
3175 bfd *old_bfd;
3176
3177 /* TLS local dynamic got entry handling. */
3178 union {
3179 bfd_signed_vma refcount;
3180 bfd_vma offset;
3181 } tlsld_got;
3182
3183 /* Offset of branch table to PltResolve function in glink. */
3184 bfd_vma glink_pltresolve;
3185
3186 /* Size of reserved GOT entries. */
3187 unsigned int got_header_size;
3188 /* Non-zero if allocating the header left a gap. */
3189 unsigned int got_gap;
3190
3191 /* The type of PLT we have chosen to use. */
3192 enum ppc_elf_plt_type plt_type;
3193
3194 /* True if the target system is VxWorks. */
3195 unsigned int is_vxworks:1;
3196
3197 /* The size of PLT entries. */
3198 int plt_entry_size;
3199 /* The distance between adjacent PLT slots. */
3200 int plt_slot_size;
3201 /* The size of the first PLT entry. */
3202 int plt_initial_entry_size;
3203
3204 /* Small local sym cache. */
3205 struct sym_cache sym_cache;
3206 };
3207
3208 /* Rename some of the generic section flags to better document how they
3209 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3210
3211 /* Nonzero if this section has TLS related relocations. */
3212 #define has_tls_reloc sec_flg0
3213
3214 /* Nonzero if this section has a call to __tls_get_addr. */
3215 #define has_tls_get_addr_call sec_flg1
3216
3217 /* Get the PPC ELF linker hash table from a link_info structure. */
3218
3219 #define ppc_elf_hash_table(p) \
3220 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3221 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3222
3223 /* Create an entry in a PPC ELF linker hash table. */
3224
3225 static struct bfd_hash_entry *
3226 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3227 struct bfd_hash_table *table,
3228 const char *string)
3229 {
3230 /* Allocate the structure if it has not already been allocated by a
3231 subclass. */
3232 if (entry == NULL)
3233 {
3234 entry = bfd_hash_allocate (table,
3235 sizeof (struct ppc_elf_link_hash_entry));
3236 if (entry == NULL)
3237 return entry;
3238 }
3239
3240 /* Call the allocation method of the superclass. */
3241 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3242 if (entry != NULL)
3243 {
3244 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3245 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3246 ppc_elf_hash_entry (entry)->tls_mask = 0;
3247 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3248 }
3249
3250 return entry;
3251 }
3252
3253 /* Create a PPC ELF linker hash table. */
3254
3255 static struct bfd_link_hash_table *
3256 ppc_elf_link_hash_table_create (bfd *abfd)
3257 {
3258 struct ppc_elf_link_hash_table *ret;
3259 static struct ppc_elf_params default_params = { PLT_OLD, 0, 1, 0, 0, 12 };
3260
3261 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3262 if (ret == NULL)
3263 return NULL;
3264
3265 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3266 ppc_elf_link_hash_newfunc,
3267 sizeof (struct ppc_elf_link_hash_entry),
3268 PPC32_ELF_DATA))
3269 {
3270 free (ret);
3271 return NULL;
3272 }
3273
3274 ret->elf.init_plt_refcount.refcount = 0;
3275 ret->elf.init_plt_refcount.glist = NULL;
3276 ret->elf.init_plt_offset.offset = 0;
3277 ret->elf.init_plt_offset.glist = NULL;
3278
3279 ret->params = &default_params;
3280
3281 ret->sdata[0].name = ".sdata";
3282 ret->sdata[0].sym_name = "_SDA_BASE_";
3283 ret->sdata[0].bss_name = ".sbss";
3284
3285 ret->sdata[1].name = ".sdata2";
3286 ret->sdata[1].sym_name = "_SDA2_BASE_";
3287 ret->sdata[1].bss_name = ".sbss2";
3288
3289 ret->plt_entry_size = 12;
3290 ret->plt_slot_size = 8;
3291 ret->plt_initial_entry_size = 72;
3292
3293 return &ret->elf.root;
3294 }
3295
3296 /* Hook linker params into hash table. */
3297
3298 void
3299 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3300 {
3301 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3302
3303 if (htab)
3304 htab->params = params;
3305 }
3306
3307 /* Create .got and the related sections. */
3308
3309 static bfd_boolean
3310 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3311 {
3312 struct ppc_elf_link_hash_table *htab;
3313 asection *s;
3314 flagword flags;
3315
3316 if (!_bfd_elf_create_got_section (abfd, info))
3317 return FALSE;
3318
3319 htab = ppc_elf_hash_table (info);
3320 htab->got = s = bfd_get_linker_section (abfd, ".got");
3321 if (s == NULL)
3322 abort ();
3323
3324 if (htab->is_vxworks)
3325 {
3326 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3327 if (!htab->sgotplt)
3328 abort ();
3329 }
3330 else
3331 {
3332 /* The powerpc .got has a blrl instruction in it. Mark it
3333 executable. */
3334 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3335 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3336 if (!bfd_set_section_flags (abfd, s, flags))
3337 return FALSE;
3338 }
3339
3340 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3341 if (!htab->relgot)
3342 abort ();
3343
3344 return TRUE;
3345 }
3346
3347 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3348 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3349 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3350
3351 static bfd_boolean
3352 ppc_elf_create_linker_section (bfd *abfd,
3353 struct bfd_link_info *info,
3354 flagword flags,
3355 elf_linker_section_t *lsect)
3356 {
3357 asection *s;
3358
3359 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3360 | SEC_LINKER_CREATED);
3361
3362 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3363 if (s == NULL)
3364 return FALSE;
3365 lsect->section = s;
3366
3367 /* Define the sym on the first section of this name. */
3368 s = bfd_get_section_by_name (abfd, lsect->name);
3369
3370 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3371 if (lsect->sym == NULL)
3372 return FALSE;
3373 lsect->sym->root.u.def.value = 0x8000;
3374 return TRUE;
3375 }
3376
3377 static bfd_boolean
3378 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3379 {
3380 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3381 asection *s;
3382 flagword flags;
3383
3384 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3385 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3386 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3387 htab->glink = s;
3388 if (s == NULL
3389 || !bfd_set_section_alignment (abfd, s,
3390 htab->params->ppc476_workaround ? 6 : 4))
3391 return FALSE;
3392
3393 if (!info->no_ld_generated_unwind_info)
3394 {
3395 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3396 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3397 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3398 htab->glink_eh_frame = s;
3399 if (s == NULL
3400 || !bfd_set_section_alignment (abfd, s, 2))
3401 return FALSE;
3402 }
3403
3404 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3405 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3406 htab->iplt = s;
3407 if (s == NULL
3408 || !bfd_set_section_alignment (abfd, s, 4))
3409 return FALSE;
3410
3411 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3412 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3413 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3414 htab->reliplt = s;
3415 if (s == NULL
3416 || ! bfd_set_section_alignment (abfd, s, 2))
3417 return FALSE;
3418
3419 if (!ppc_elf_create_linker_section (abfd, info, 0,
3420 &htab->sdata[0]))
3421 return FALSE;
3422
3423 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3424 &htab->sdata[1]))
3425 return FALSE;
3426
3427 return TRUE;
3428 }
3429
3430 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3431 to output sections (just like _bfd_elf_create_dynamic_sections has
3432 to create .dynbss and .rela.bss). */
3433
3434 static bfd_boolean
3435 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3436 {
3437 struct ppc_elf_link_hash_table *htab;
3438 asection *s;
3439 flagword flags;
3440
3441 htab = ppc_elf_hash_table (info);
3442
3443 if (htab->got == NULL
3444 && !ppc_elf_create_got (abfd, info))
3445 return FALSE;
3446
3447 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3448 return FALSE;
3449
3450 if (htab->glink == NULL
3451 && !ppc_elf_create_glink (abfd, info))
3452 return FALSE;
3453
3454 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3455 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3456 SEC_ALLOC | SEC_LINKER_CREATED);
3457 htab->dynsbss = s;
3458 if (s == NULL)
3459 return FALSE;
3460
3461 if (! info->shared)
3462 {
3463 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3464 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3465 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3466 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3467 htab->relsbss = s;
3468 if (s == NULL
3469 || ! bfd_set_section_alignment (abfd, s, 2))
3470 return FALSE;
3471 }
3472
3473 if (htab->is_vxworks
3474 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3475 return FALSE;
3476
3477 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3478 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3479 if (s == NULL)
3480 abort ();
3481
3482 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3483 if (htab->plt_type == PLT_VXWORKS)
3484 /* The VxWorks PLT is a loaded section with contents. */
3485 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3486 return bfd_set_section_flags (abfd, s, flags);
3487 }
3488
3489 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3490
3491 static void
3492 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3493 struct elf_link_hash_entry *dir,
3494 struct elf_link_hash_entry *ind)
3495 {
3496 struct ppc_elf_link_hash_entry *edir, *eind;
3497
3498 edir = (struct ppc_elf_link_hash_entry *) dir;
3499 eind = (struct ppc_elf_link_hash_entry *) ind;
3500
3501 edir->tls_mask |= eind->tls_mask;
3502 edir->has_sda_refs |= eind->has_sda_refs;
3503
3504 /* If called to transfer flags for a weakdef during processing
3505 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3506 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3507 if (!(ELIMINATE_COPY_RELOCS
3508 && eind->elf.root.type != bfd_link_hash_indirect
3509 && edir->elf.dynamic_adjusted))
3510 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3511
3512 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3513 edir->elf.ref_regular |= eind->elf.ref_regular;
3514 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3515 edir->elf.needs_plt |= eind->elf.needs_plt;
3516 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3517
3518 if (eind->dyn_relocs != NULL)
3519 {
3520 if (edir->dyn_relocs != NULL)
3521 {
3522 struct elf_dyn_relocs **pp;
3523 struct elf_dyn_relocs *p;
3524
3525 /* Add reloc counts against the indirect sym to the direct sym
3526 list. Merge any entries against the same section. */
3527 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3528 {
3529 struct elf_dyn_relocs *q;
3530
3531 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3532 if (q->sec == p->sec)
3533 {
3534 q->pc_count += p->pc_count;
3535 q->count += p->count;
3536 *pp = p->next;
3537 break;
3538 }
3539 if (q == NULL)
3540 pp = &p->next;
3541 }
3542 *pp = edir->dyn_relocs;
3543 }
3544
3545 edir->dyn_relocs = eind->dyn_relocs;
3546 eind->dyn_relocs = NULL;
3547 }
3548
3549 /* If we were called to copy over info for a weak sym, that's all.
3550 You might think dyn_relocs need not be copied over; After all,
3551 both syms will be dynamic or both non-dynamic so we're just
3552 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3553 code in ppc_elf_adjust_dynamic_symbol needs to check for
3554 dyn_relocs in read-only sections, and it does so on what is the
3555 DIR sym here. */
3556 if (eind->elf.root.type != bfd_link_hash_indirect)
3557 return;
3558
3559 /* Copy over the GOT refcount entries that we may have already seen to
3560 the symbol which just became indirect. */
3561 edir->elf.got.refcount += eind->elf.got.refcount;
3562 eind->elf.got.refcount = 0;
3563
3564 /* And plt entries. */
3565 if (eind->elf.plt.plist != NULL)
3566 {
3567 if (edir->elf.plt.plist != NULL)
3568 {
3569 struct plt_entry **entp;
3570 struct plt_entry *ent;
3571
3572 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3573 {
3574 struct plt_entry *dent;
3575
3576 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3577 if (dent->sec == ent->sec && dent->addend == ent->addend)
3578 {
3579 dent->plt.refcount += ent->plt.refcount;
3580 *entp = ent->next;
3581 break;
3582 }
3583 if (dent == NULL)
3584 entp = &ent->next;
3585 }
3586 *entp = edir->elf.plt.plist;
3587 }
3588
3589 edir->elf.plt.plist = eind->elf.plt.plist;
3590 eind->elf.plt.plist = NULL;
3591 }
3592
3593 if (eind->elf.dynindx != -1)
3594 {
3595 if (edir->elf.dynindx != -1)
3596 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3597 edir->elf.dynstr_index);
3598 edir->elf.dynindx = eind->elf.dynindx;
3599 edir->elf.dynstr_index = eind->elf.dynstr_index;
3600 eind->elf.dynindx = -1;
3601 eind->elf.dynstr_index = 0;
3602 }
3603 }
3604
3605 /* Hook called by the linker routine which adds symbols from an object
3606 file. We use it to put .comm items in .sbss, and not .bss. */
3607
3608 static bfd_boolean
3609 ppc_elf_add_symbol_hook (bfd *abfd,
3610 struct bfd_link_info *info,
3611 Elf_Internal_Sym *sym,
3612 const char **namep ATTRIBUTE_UNUSED,
3613 flagword *flagsp ATTRIBUTE_UNUSED,
3614 asection **secp,
3615 bfd_vma *valp)
3616 {
3617 if (sym->st_shndx == SHN_COMMON
3618 && !info->relocatable
3619 && is_ppc_elf (info->output_bfd)
3620 && sym->st_size <= elf_gp_size (abfd))
3621 {
3622 /* Common symbols less than or equal to -G nn bytes are automatically
3623 put into .sbss. */
3624 struct ppc_elf_link_hash_table *htab;
3625
3626 htab = ppc_elf_hash_table (info);
3627 if (htab->sbss == NULL)
3628 {
3629 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3630
3631 if (!htab->elf.dynobj)
3632 htab->elf.dynobj = abfd;
3633
3634 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3635 ".sbss",
3636 flags);
3637 if (htab->sbss == NULL)
3638 return FALSE;
3639 }
3640
3641 *secp = htab->sbss;
3642 *valp = sym->st_size;
3643 }
3644
3645 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3646 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
3647 && (abfd->flags & DYNAMIC) == 0
3648 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3649 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3650
3651 return TRUE;
3652 }
3653 \f
3654 /* Find a linker generated pointer with a given addend and type. */
3655
3656 static elf_linker_section_pointers_t *
3657 elf_find_pointer_linker_section
3658 (elf_linker_section_pointers_t *linker_pointers,
3659 bfd_vma addend,
3660 elf_linker_section_t *lsect)
3661 {
3662 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3663 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3664 return linker_pointers;
3665
3666 return NULL;
3667 }
3668
3669 /* Allocate a pointer to live in a linker created section. */
3670
3671 static bfd_boolean
3672 elf_allocate_pointer_linker_section (bfd *abfd,
3673 elf_linker_section_t *lsect,
3674 struct elf_link_hash_entry *h,
3675 const Elf_Internal_Rela *rel)
3676 {
3677 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3678 elf_linker_section_pointers_t *linker_section_ptr;
3679 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3680 bfd_size_type amt;
3681
3682 BFD_ASSERT (lsect != NULL);
3683
3684 /* Is this a global symbol? */
3685 if (h != NULL)
3686 {
3687 struct ppc_elf_link_hash_entry *eh;
3688
3689 /* Has this symbol already been allocated? If so, our work is done. */
3690 eh = (struct ppc_elf_link_hash_entry *) h;
3691 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3692 rel->r_addend,
3693 lsect))
3694 return TRUE;
3695
3696 ptr_linker_section_ptr = &eh->linker_section_pointer;
3697 }
3698 else
3699 {
3700 BFD_ASSERT (is_ppc_elf (abfd));
3701
3702 /* Allocation of a pointer to a local symbol. */
3703 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3704
3705 /* Allocate a table to hold the local symbols if first time. */
3706 if (!ptr)
3707 {
3708 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3709
3710 amt = num_symbols;
3711 amt *= sizeof (elf_linker_section_pointers_t *);
3712 ptr = bfd_zalloc (abfd, amt);
3713
3714 if (!ptr)
3715 return FALSE;
3716
3717 elf_local_ptr_offsets (abfd) = ptr;
3718 }
3719
3720 /* Has this symbol already been allocated? If so, our work is done. */
3721 if (elf_find_pointer_linker_section (ptr[r_symndx],
3722 rel->r_addend,
3723 lsect))
3724 return TRUE;
3725
3726 ptr_linker_section_ptr = &ptr[r_symndx];
3727 }
3728
3729 /* Allocate space for a pointer in the linker section, and allocate
3730 a new pointer record from internal memory. */
3731 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3732 amt = sizeof (elf_linker_section_pointers_t);
3733 linker_section_ptr = bfd_alloc (abfd, amt);
3734
3735 if (!linker_section_ptr)
3736 return FALSE;
3737
3738 linker_section_ptr->next = *ptr_linker_section_ptr;
3739 linker_section_ptr->addend = rel->r_addend;
3740 linker_section_ptr->lsect = lsect;
3741 *ptr_linker_section_ptr = linker_section_ptr;
3742
3743 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3744 return FALSE;
3745 linker_section_ptr->offset = lsect->section->size;
3746 lsect->section->size += 4;
3747
3748 #ifdef DEBUG
3749 fprintf (stderr,
3750 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3751 lsect->name, (long) linker_section_ptr->offset,
3752 (long) lsect->section->size);
3753 #endif
3754
3755 return TRUE;
3756 }
3757
3758 static struct plt_entry **
3759 update_local_sym_info (bfd *abfd,
3760 Elf_Internal_Shdr *symtab_hdr,
3761 unsigned long r_symndx,
3762 int tls_type)
3763 {
3764 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3765 struct plt_entry **local_plt;
3766 char *local_got_tls_masks;
3767
3768 if (local_got_refcounts == NULL)
3769 {
3770 bfd_size_type size = symtab_hdr->sh_info;
3771
3772 size *= (sizeof (*local_got_refcounts)
3773 + sizeof (*local_plt)
3774 + sizeof (*local_got_tls_masks));
3775 local_got_refcounts = bfd_zalloc (abfd, size);
3776 if (local_got_refcounts == NULL)
3777 return NULL;
3778 elf_local_got_refcounts (abfd) = local_got_refcounts;
3779 }
3780
3781 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3782 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3783 local_got_tls_masks[r_symndx] |= tls_type;
3784 if (tls_type != PLT_IFUNC)
3785 local_got_refcounts[r_symndx] += 1;
3786 return local_plt + r_symndx;
3787 }
3788
3789 static bfd_boolean
3790 update_plt_info (bfd *abfd, struct plt_entry **plist,
3791 asection *sec, bfd_vma addend)
3792 {
3793 struct plt_entry *ent;
3794
3795 if (addend < 32768)
3796 sec = NULL;
3797 for (ent = *plist; ent != NULL; ent = ent->next)
3798 if (ent->sec == sec && ent->addend == addend)
3799 break;
3800 if (ent == NULL)
3801 {
3802 bfd_size_type amt = sizeof (*ent);
3803 ent = bfd_alloc (abfd, amt);
3804 if (ent == NULL)
3805 return FALSE;
3806 ent->next = *plist;
3807 ent->sec = sec;
3808 ent->addend = addend;
3809 ent->plt.refcount = 0;
3810 *plist = ent;
3811 }
3812 ent->plt.refcount += 1;
3813 return TRUE;
3814 }
3815
3816 static struct plt_entry *
3817 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3818 {
3819 struct plt_entry *ent;
3820
3821 if (addend < 32768)
3822 sec = NULL;
3823 for (ent = *plist; ent != NULL; ent = ent->next)
3824 if (ent->sec == sec && ent->addend == addend)
3825 break;
3826 return ent;
3827 }
3828
3829 static bfd_boolean
3830 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3831 {
3832 return (r_type == R_PPC_PLTREL24
3833 || r_type == R_PPC_LOCAL24PC
3834 || r_type == R_PPC_REL24
3835 || r_type == R_PPC_REL14
3836 || r_type == R_PPC_REL14_BRTAKEN
3837 || r_type == R_PPC_REL14_BRNTAKEN
3838 || r_type == R_PPC_ADDR24
3839 || r_type == R_PPC_ADDR14
3840 || r_type == R_PPC_ADDR14_BRTAKEN
3841 || r_type == R_PPC_ADDR14_BRNTAKEN);
3842 }
3843
3844 static void
3845 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3846 {
3847 (*_bfd_error_handler)
3848 (_("%B: relocation %s cannot be used when making a shared object"),
3849 abfd,
3850 ppc_elf_howto_table[r_type]->name);
3851 bfd_set_error (bfd_error_bad_value);
3852 }
3853
3854 /* Look through the relocs for a section during the first phase, and
3855 allocate space in the global offset table or procedure linkage
3856 table. */
3857
3858 static bfd_boolean
3859 ppc_elf_check_relocs (bfd *abfd,
3860 struct bfd_link_info *info,
3861 asection *sec,
3862 const Elf_Internal_Rela *relocs)
3863 {
3864 struct ppc_elf_link_hash_table *htab;
3865 Elf_Internal_Shdr *symtab_hdr;
3866 struct elf_link_hash_entry **sym_hashes;
3867 const Elf_Internal_Rela *rel;
3868 const Elf_Internal_Rela *rel_end;
3869 asection *got2, *sreloc;
3870 struct elf_link_hash_entry *tga;
3871
3872 if (info->relocatable)
3873 return TRUE;
3874
3875 /* Don't do anything special with non-loaded, non-alloced sections.
3876 In particular, any relocs in such sections should not affect GOT
3877 and PLT reference counting (ie. we don't allow them to create GOT
3878 or PLT entries), there's no possibility or desire to optimize TLS
3879 relocs, and there's not much point in propagating relocs to shared
3880 libs that the dynamic linker won't relocate. */
3881 if ((sec->flags & SEC_ALLOC) == 0)
3882 return TRUE;
3883
3884 #ifdef DEBUG
3885 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3886 sec, abfd);
3887 #endif
3888
3889 BFD_ASSERT (is_ppc_elf (abfd));
3890
3891 /* Initialize howto table if not already done. */
3892 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3893 ppc_elf_howto_init ();
3894
3895 htab = ppc_elf_hash_table (info);
3896 if (htab->glink == NULL)
3897 {
3898 if (htab->elf.dynobj == NULL)
3899 htab->elf.dynobj = abfd;
3900 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3901 return FALSE;
3902 }
3903 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3904 FALSE, FALSE, TRUE);
3905 symtab_hdr = &elf_symtab_hdr (abfd);
3906 sym_hashes = elf_sym_hashes (abfd);
3907 got2 = bfd_get_section_by_name (abfd, ".got2");
3908 sreloc = NULL;
3909
3910 rel_end = relocs + sec->reloc_count;
3911 for (rel = relocs; rel < rel_end; rel++)
3912 {
3913 unsigned long r_symndx;
3914 enum elf_ppc_reloc_type r_type;
3915 struct elf_link_hash_entry *h;
3916 int tls_type;
3917
3918 r_symndx = ELF32_R_SYM (rel->r_info);
3919 if (r_symndx < symtab_hdr->sh_info)
3920 h = NULL;
3921 else
3922 {
3923 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3924 while (h->root.type == bfd_link_hash_indirect
3925 || h->root.type == bfd_link_hash_warning)
3926 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3927
3928 /* PR15323, ref flags aren't set for references in the same
3929 object. */
3930 h->root.non_ir_ref = 1;
3931 }
3932
3933 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3934 This shows up in particular in an R_PPC_ADDR32 in the eabi
3935 startup code. */
3936 if (h != NULL
3937 && htab->got == NULL
3938 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3939 {
3940 if (htab->elf.dynobj == NULL)
3941 htab->elf.dynobj = abfd;
3942 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3943 return FALSE;
3944 BFD_ASSERT (h == htab->elf.hgot);
3945 }
3946
3947 tls_type = 0;
3948 r_type = ELF32_R_TYPE (rel->r_info);
3949 if (h == NULL && !htab->is_vxworks)
3950 {
3951 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3952 abfd, r_symndx);
3953 if (isym == NULL)
3954 return FALSE;
3955
3956 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3957 {
3958 struct plt_entry **ifunc;
3959
3960 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3961 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3962 PLT_IFUNC);
3963 if (ifunc == NULL)
3964 return FALSE;
3965
3966 /* STT_GNU_IFUNC symbols must have a PLT entry;
3967 In a non-pie executable even when there are
3968 no plt calls. */
3969 if (!info->shared
3970 || is_branch_reloc (r_type))
3971 {
3972 bfd_vma addend = 0;
3973 if (r_type == R_PPC_PLTREL24)
3974 {
3975 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3976 if (info->shared)
3977 addend = rel->r_addend;
3978 }
3979 if (!update_plt_info (abfd, ifunc, got2, addend))
3980 return FALSE;
3981 }
3982 }
3983 }
3984
3985 if (!htab->is_vxworks
3986 && is_branch_reloc (r_type)
3987 && h != NULL
3988 && h == tga)
3989 {
3990 if (rel != relocs
3991 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3992 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3993 /* We have a new-style __tls_get_addr call with a marker
3994 reloc. */
3995 ;
3996 else
3997 /* Mark this section as having an old-style call. */
3998 sec->has_tls_get_addr_call = 1;
3999 }
4000
4001 switch (r_type)
4002 {
4003 case R_PPC_TLSGD:
4004 case R_PPC_TLSLD:
4005 /* These special tls relocs tie a call to __tls_get_addr with
4006 its parameter symbol. */
4007 break;
4008
4009 case R_PPC_GOT_TLSLD16:
4010 case R_PPC_GOT_TLSLD16_LO:
4011 case R_PPC_GOT_TLSLD16_HI:
4012 case R_PPC_GOT_TLSLD16_HA:
4013 tls_type = TLS_TLS | TLS_LD;
4014 goto dogottls;
4015
4016 case R_PPC_GOT_TLSGD16:
4017 case R_PPC_GOT_TLSGD16_LO:
4018 case R_PPC_GOT_TLSGD16_HI:
4019 case R_PPC_GOT_TLSGD16_HA:
4020 tls_type = TLS_TLS | TLS_GD;
4021 goto dogottls;
4022
4023 case R_PPC_GOT_TPREL16:
4024 case R_PPC_GOT_TPREL16_LO:
4025 case R_PPC_GOT_TPREL16_HI:
4026 case R_PPC_GOT_TPREL16_HA:
4027 if (info->shared)
4028 info->flags |= DF_STATIC_TLS;
4029 tls_type = TLS_TLS | TLS_TPREL;
4030 goto dogottls;
4031
4032 case R_PPC_GOT_DTPREL16:
4033 case R_PPC_GOT_DTPREL16_LO:
4034 case R_PPC_GOT_DTPREL16_HI:
4035 case R_PPC_GOT_DTPREL16_HA:
4036 tls_type = TLS_TLS | TLS_DTPREL;
4037 dogottls:
4038 sec->has_tls_reloc = 1;
4039 /* Fall thru */
4040
4041 /* GOT16 relocations */
4042 case R_PPC_GOT16:
4043 case R_PPC_GOT16_LO:
4044 case R_PPC_GOT16_HI:
4045 case R_PPC_GOT16_HA:
4046 /* This symbol requires a global offset table entry. */
4047 if (htab->got == NULL)
4048 {
4049 if (htab->elf.dynobj == NULL)
4050 htab->elf.dynobj = abfd;
4051 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4052 return FALSE;
4053 }
4054 if (h != NULL)
4055 {
4056 h->got.refcount += 1;
4057 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4058 }
4059 else
4060 /* This is a global offset table entry for a local symbol. */
4061 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4062 return FALSE;
4063
4064 /* We may also need a plt entry if the symbol turns out to be
4065 an ifunc. */
4066 if (h != NULL && !info->shared)
4067 {
4068 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4069 return FALSE;
4070 }
4071 break;
4072
4073 /* Indirect .sdata relocation. */
4074 case R_PPC_EMB_SDAI16:
4075 if (info->shared)
4076 {
4077 bad_shared_reloc (abfd, r_type);
4078 return FALSE;
4079 }
4080 htab->sdata[0].sym->ref_regular = 1;
4081 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4082 h, rel))
4083 return FALSE;
4084 if (h != NULL)
4085 {
4086 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4087 h->non_got_ref = TRUE;
4088 }
4089 break;
4090
4091 /* Indirect .sdata2 relocation. */
4092 case R_PPC_EMB_SDA2I16:
4093 if (info->shared)
4094 {
4095 bad_shared_reloc (abfd, r_type);
4096 return FALSE;
4097 }
4098 htab->sdata[1].sym->ref_regular = 1;
4099 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4100 h, rel))
4101 return FALSE;
4102 if (h != NULL)
4103 {
4104 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4105 h->non_got_ref = TRUE;
4106 }
4107 break;
4108
4109 case R_PPC_SDAREL16:
4110 htab->sdata[0].sym->ref_regular = 1;
4111 /* Fall thru */
4112
4113 case R_PPC_VLE_SDAREL_LO16A:
4114 case R_PPC_VLE_SDAREL_LO16D:
4115 case R_PPC_VLE_SDAREL_HI16A:
4116 case R_PPC_VLE_SDAREL_HI16D:
4117 case R_PPC_VLE_SDAREL_HA16A:
4118 case R_PPC_VLE_SDAREL_HA16D:
4119 if (h != NULL)
4120 {
4121 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4122 h->non_got_ref = TRUE;
4123 }
4124 break;
4125
4126 case R_PPC_VLE_REL8:
4127 case R_PPC_VLE_REL15:
4128 case R_PPC_VLE_REL24:
4129 case R_PPC_VLE_LO16A:
4130 case R_PPC_VLE_LO16D:
4131 case R_PPC_VLE_HI16A:
4132 case R_PPC_VLE_HI16D:
4133 case R_PPC_VLE_HA16A:
4134 case R_PPC_VLE_HA16D:
4135 break;
4136
4137 case R_PPC_EMB_SDA2REL:
4138 if (info->shared)
4139 {
4140 bad_shared_reloc (abfd, r_type);
4141 return FALSE;
4142 }
4143 htab->sdata[1].sym->ref_regular = 1;
4144 if (h != NULL)
4145 {
4146 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4147 h->non_got_ref = TRUE;
4148 }
4149 break;
4150
4151 case R_PPC_VLE_SDA21_LO:
4152 case R_PPC_VLE_SDA21:
4153 case R_PPC_EMB_SDA21:
4154 case R_PPC_EMB_RELSDA:
4155 if (info->shared)
4156 {
4157 bad_shared_reloc (abfd, r_type);
4158 return FALSE;
4159 }
4160 if (h != NULL)
4161 {
4162 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4163 h->non_got_ref = TRUE;
4164 }
4165 break;
4166
4167 case R_PPC_EMB_NADDR32:
4168 case R_PPC_EMB_NADDR16:
4169 case R_PPC_EMB_NADDR16_LO:
4170 case R_PPC_EMB_NADDR16_HI:
4171 case R_PPC_EMB_NADDR16_HA:
4172 if (info->shared)
4173 {
4174 bad_shared_reloc (abfd, r_type);
4175 return FALSE;
4176 }
4177 if (h != NULL)
4178 h->non_got_ref = TRUE;
4179 break;
4180
4181 case R_PPC_PLTREL24:
4182 if (h == NULL)
4183 break;
4184 /* Fall through */
4185 case R_PPC_PLT32:
4186 case R_PPC_PLTREL32:
4187 case R_PPC_PLT16_LO:
4188 case R_PPC_PLT16_HI:
4189 case R_PPC_PLT16_HA:
4190 #ifdef DEBUG
4191 fprintf (stderr, "Reloc requires a PLT entry\n");
4192 #endif
4193 /* This symbol requires a procedure linkage table entry. We
4194 actually build the entry in finish_dynamic_symbol,
4195 because this might be a case of linking PIC code without
4196 linking in any dynamic objects, in which case we don't
4197 need to generate a procedure linkage table after all. */
4198
4199 if (h == NULL)
4200 {
4201 /* It does not make sense to have a procedure linkage
4202 table entry for a local symbol. */
4203 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4204 abfd, sec, rel->r_offset,
4205 ppc_elf_howto_table[r_type]->name);
4206 bfd_set_error (bfd_error_bad_value);
4207 return FALSE;
4208 }
4209 else
4210 {
4211 bfd_vma addend = 0;
4212
4213 if (r_type == R_PPC_PLTREL24)
4214 {
4215 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4216 if (info->shared)
4217 addend = rel->r_addend;
4218 }
4219 h->needs_plt = 1;
4220 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4221 return FALSE;
4222 }
4223 break;
4224
4225 /* The following relocations don't need to propagate the
4226 relocation if linking a shared object since they are
4227 section relative. */
4228 case R_PPC_SECTOFF:
4229 case R_PPC_SECTOFF_LO:
4230 case R_PPC_SECTOFF_HI:
4231 case R_PPC_SECTOFF_HA:
4232 case R_PPC_DTPREL16:
4233 case R_PPC_DTPREL16_LO:
4234 case R_PPC_DTPREL16_HI:
4235 case R_PPC_DTPREL16_HA:
4236 case R_PPC_TOC16:
4237 break;
4238
4239 case R_PPC_REL16:
4240 case R_PPC_REL16_LO:
4241 case R_PPC_REL16_HI:
4242 case R_PPC_REL16_HA:
4243 ppc_elf_tdata (abfd)->has_rel16 = 1;
4244 break;
4245
4246 /* These are just markers. */
4247 case R_PPC_TLS:
4248 case R_PPC_EMB_MRKREF:
4249 case R_PPC_NONE:
4250 case R_PPC_max:
4251 case R_PPC_RELAX:
4252 case R_PPC_RELAX_PLT:
4253 case R_PPC_RELAX_PLTREL24:
4254 break;
4255
4256 /* These should only appear in dynamic objects. */
4257 case R_PPC_COPY:
4258 case R_PPC_GLOB_DAT:
4259 case R_PPC_JMP_SLOT:
4260 case R_PPC_RELATIVE:
4261 case R_PPC_IRELATIVE:
4262 break;
4263
4264 /* These aren't handled yet. We'll report an error later. */
4265 case R_PPC_ADDR30:
4266 case R_PPC_EMB_RELSEC16:
4267 case R_PPC_EMB_RELST_LO:
4268 case R_PPC_EMB_RELST_HI:
4269 case R_PPC_EMB_RELST_HA:
4270 case R_PPC_EMB_BIT_FLD:
4271 break;
4272
4273 /* This refers only to functions defined in the shared library. */
4274 case R_PPC_LOCAL24PC:
4275 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4276 {
4277 htab->plt_type = PLT_OLD;
4278 htab->old_bfd = abfd;
4279 }
4280 if (h != NULL && h->type == STT_GNU_IFUNC)
4281 {
4282 if (info->shared)
4283 {
4284 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4285 abfd, sec, rel->r_offset,
4286 h->root.root.string);
4287 bfd_set_error (bfd_error_bad_value);
4288 return FALSE;
4289 }
4290 h->needs_plt = 1;
4291 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4292 return FALSE;
4293 }
4294 break;
4295
4296 /* This relocation describes the C++ object vtable hierarchy.
4297 Reconstruct it for later use during GC. */
4298 case R_PPC_GNU_VTINHERIT:
4299 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4300 return FALSE;
4301 break;
4302
4303 /* This relocation describes which C++ vtable entries are actually
4304 used. Record for later use during GC. */
4305 case R_PPC_GNU_VTENTRY:
4306 BFD_ASSERT (h != NULL);
4307 if (h != NULL
4308 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4309 return FALSE;
4310 break;
4311
4312 /* We shouldn't really be seeing these. */
4313 case R_PPC_TPREL32:
4314 case R_PPC_TPREL16:
4315 case R_PPC_TPREL16_LO:
4316 case R_PPC_TPREL16_HI:
4317 case R_PPC_TPREL16_HA:
4318 if (info->shared)
4319 info->flags |= DF_STATIC_TLS;
4320 goto dodyn;
4321
4322 /* Nor these. */
4323 case R_PPC_DTPMOD32:
4324 case R_PPC_DTPREL32:
4325 goto dodyn;
4326
4327 case R_PPC_REL32:
4328 if (h == NULL
4329 && got2 != NULL
4330 && (sec->flags & SEC_CODE) != 0
4331 && info->shared
4332 && htab->plt_type == PLT_UNSET)
4333 {
4334 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4335 the start of a function, which assembles to a REL32
4336 reference to .got2. If we detect one of these, then
4337 force the old PLT layout because the linker cannot
4338 reliably deduce the GOT pointer value needed for
4339 PLT call stubs. */
4340 asection *s;
4341 Elf_Internal_Sym *isym;
4342
4343 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4344 abfd, r_symndx);
4345 if (isym == NULL)
4346 return FALSE;
4347
4348 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4349 if (s == got2)
4350 {
4351 htab->plt_type = PLT_OLD;
4352 htab->old_bfd = abfd;
4353 }
4354 }
4355 if (h == NULL || h == htab->elf.hgot)
4356 break;
4357 /* fall through */
4358
4359 case R_PPC_ADDR32:
4360 case R_PPC_ADDR16:
4361 case R_PPC_ADDR16_LO:
4362 case R_PPC_ADDR16_HI:
4363 case R_PPC_ADDR16_HA:
4364 case R_PPC_UADDR32:
4365 case R_PPC_UADDR16:
4366 if (h != NULL && !info->shared)
4367 {
4368 /* We may need a plt entry if the symbol turns out to be
4369 a function defined in a dynamic object. */
4370 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4371 return FALSE;
4372
4373 /* We may need a copy reloc too. */
4374 h->non_got_ref = 1;
4375 h->pointer_equality_needed = 1;
4376 }
4377 goto dodyn;
4378
4379 case R_PPC_REL24:
4380 case R_PPC_REL14:
4381 case R_PPC_REL14_BRTAKEN:
4382 case R_PPC_REL14_BRNTAKEN:
4383 if (h == NULL)
4384 break;
4385 if (h == htab->elf.hgot)
4386 {
4387 if (htab->plt_type == PLT_UNSET)
4388 {
4389 htab->plt_type = PLT_OLD;
4390 htab->old_bfd = abfd;
4391 }
4392 break;
4393 }
4394 /* fall through */
4395
4396 case R_PPC_ADDR24:
4397 case R_PPC_ADDR14:
4398 case R_PPC_ADDR14_BRTAKEN:
4399 case R_PPC_ADDR14_BRNTAKEN:
4400 if (h != NULL && !info->shared)
4401 {
4402 /* We may need a plt entry if the symbol turns out to be
4403 a function defined in a dynamic object. */
4404 h->needs_plt = 1;
4405 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4406 return FALSE;
4407 break;
4408 }
4409
4410 dodyn:
4411 /* If we are creating a shared library, and this is a reloc
4412 against a global symbol, or a non PC relative reloc
4413 against a local symbol, then we need to copy the reloc
4414 into the shared library. However, if we are linking with
4415 -Bsymbolic, we do not need to copy a reloc against a
4416 global symbol which is defined in an object we are
4417 including in the link (i.e., DEF_REGULAR is set). At
4418 this point we have not seen all the input files, so it is
4419 possible that DEF_REGULAR is not set now but will be set
4420 later (it is never cleared). In case of a weak definition,
4421 DEF_REGULAR may be cleared later by a strong definition in
4422 a shared library. We account for that possibility below by
4423 storing information in the dyn_relocs field of the hash
4424 table entry. A similar situation occurs when creating
4425 shared libraries and symbol visibility changes render the
4426 symbol local.
4427
4428 If on the other hand, we are creating an executable, we
4429 may need to keep relocations for symbols satisfied by a
4430 dynamic library if we manage to avoid copy relocs for the
4431 symbol. */
4432 if ((info->shared
4433 && (must_be_dyn_reloc (info, r_type)
4434 || (h != NULL
4435 && (!SYMBOLIC_BIND (info, h)
4436 || h->root.type == bfd_link_hash_defweak
4437 || !h->def_regular))))
4438 || (ELIMINATE_COPY_RELOCS
4439 && !info->shared
4440 && h != NULL
4441 && (h->root.type == bfd_link_hash_defweak
4442 || !h->def_regular)))
4443 {
4444 #ifdef DEBUG
4445 fprintf (stderr,
4446 "ppc_elf_check_relocs needs to "
4447 "create relocation for %s\n",
4448 (h && h->root.root.string
4449 ? h->root.root.string : "<unknown>"));
4450 #endif
4451 if (sreloc == NULL)
4452 {
4453 if (htab->elf.dynobj == NULL)
4454 htab->elf.dynobj = abfd;
4455
4456 sreloc = _bfd_elf_make_dynamic_reloc_section
4457 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4458
4459 if (sreloc == NULL)
4460 return FALSE;
4461 }
4462
4463 /* If this is a global symbol, we count the number of
4464 relocations we need for this symbol. */
4465 if (h != NULL)
4466 {
4467 struct elf_dyn_relocs *p;
4468 struct elf_dyn_relocs **rel_head;
4469
4470 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4471 p = *rel_head;
4472 if (p == NULL || p->sec != sec)
4473 {
4474 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4475 if (p == NULL)
4476 return FALSE;
4477 p->next = *rel_head;
4478 *rel_head = p;
4479 p->sec = sec;
4480 p->count = 0;
4481 p->pc_count = 0;
4482 }
4483 p->count += 1;
4484 if (!must_be_dyn_reloc (info, r_type))
4485 p->pc_count += 1;
4486 }
4487 else
4488 {
4489 /* Track dynamic relocs needed for local syms too.
4490 We really need local syms available to do this
4491 easily. Oh well. */
4492 struct ppc_dyn_relocs *p;
4493 struct ppc_dyn_relocs **rel_head;
4494 bfd_boolean is_ifunc;
4495 asection *s;
4496 void *vpp;
4497 Elf_Internal_Sym *isym;
4498
4499 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4500 abfd, r_symndx);
4501 if (isym == NULL)
4502 return FALSE;
4503
4504 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4505 if (s == NULL)
4506 s = sec;
4507
4508 vpp = &elf_section_data (s)->local_dynrel;
4509 rel_head = (struct ppc_dyn_relocs **) vpp;
4510 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4511 p = *rel_head;
4512 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4513 p = p->next;
4514 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4515 {
4516 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4517 if (p == NULL)
4518 return FALSE;
4519 p->next = *rel_head;
4520 *rel_head = p;
4521 p->sec = sec;
4522 p->ifunc = is_ifunc;
4523 p->count = 0;
4524 }
4525 p->count += 1;
4526 }
4527 }
4528
4529 break;
4530 }
4531 }
4532
4533 return TRUE;
4534 }
4535 \f
4536
4537 /* Merge object attributes from IBFD into OBFD. Raise an error if
4538 there are conflicting attributes. */
4539 static bfd_boolean
4540 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4541 {
4542 obj_attribute *in_attr, *in_attrs;
4543 obj_attribute *out_attr, *out_attrs;
4544
4545 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4546 {
4547 /* This is the first object. Copy the attributes. */
4548 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4549
4550 /* Use the Tag_null value to indicate the attributes have been
4551 initialized. */
4552 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4553
4554 return TRUE;
4555 }
4556
4557 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4558 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4559
4560 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4561 non-conflicting ones. */
4562 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4563 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4564 if (in_attr->i != out_attr->i)
4565 {
4566 out_attr->type = 1;
4567 if (out_attr->i == 0)
4568 out_attr->i = in_attr->i;
4569 else if (in_attr->i == 0)
4570 ;
4571 else if (out_attr->i == 1 && in_attr->i == 2)
4572 _bfd_error_handler
4573 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4574 else if (out_attr->i == 1 && in_attr->i == 3)
4575 _bfd_error_handler
4576 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4577 obfd, ibfd);
4578 else if (out_attr->i == 3 && in_attr->i == 1)
4579 _bfd_error_handler
4580 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4581 ibfd, obfd);
4582 else if (out_attr->i == 3 && in_attr->i == 2)
4583 _bfd_error_handler
4584 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4585 ibfd, obfd);
4586 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4587 _bfd_error_handler
4588 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4589 else if (in_attr->i > 3)
4590 _bfd_error_handler
4591 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4592 in_attr->i);
4593 else
4594 _bfd_error_handler
4595 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4596 out_attr->i);
4597 }
4598
4599 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4600 merge non-conflicting ones. */
4601 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4602 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4603 if (in_attr->i != out_attr->i)
4604 {
4605 const char *in_abi = NULL, *out_abi = NULL;
4606
4607 switch (in_attr->i)
4608 {
4609 case 1: in_abi = "generic"; break;
4610 case 2: in_abi = "AltiVec"; break;
4611 case 3: in_abi = "SPE"; break;
4612 }
4613
4614 switch (out_attr->i)
4615 {
4616 case 1: out_abi = "generic"; break;
4617 case 2: out_abi = "AltiVec"; break;
4618 case 3: out_abi = "SPE"; break;
4619 }
4620
4621 out_attr->type = 1;
4622 if (out_attr->i == 0)
4623 out_attr->i = in_attr->i;
4624 else if (in_attr->i == 0)
4625 ;
4626 /* For now, allow generic to transition to AltiVec or SPE
4627 without a warning. If GCC marked files with their stack
4628 alignment and used don't-care markings for files which are
4629 not affected by the vector ABI, we could warn about this
4630 case too. */
4631 else if (out_attr->i == 1)
4632 out_attr->i = in_attr->i;
4633 else if (in_attr->i == 1)
4634 ;
4635 else if (in_abi == NULL)
4636 _bfd_error_handler
4637 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4638 in_attr->i);
4639 else if (out_abi == NULL)
4640 _bfd_error_handler
4641 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4642 in_attr->i);
4643 else
4644 _bfd_error_handler
4645 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4646 ibfd, obfd, in_abi, out_abi);
4647 }
4648
4649 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4650 and merge non-conflicting ones. */
4651 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4652 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4653 if (in_attr->i != out_attr->i)
4654 {
4655 out_attr->type = 1;
4656 if (out_attr->i == 0)
4657 out_attr->i = in_attr->i;
4658 else if (in_attr->i == 0)
4659 ;
4660 else if (out_attr->i == 1 && in_attr->i == 2)
4661 _bfd_error_handler
4662 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4663 else if (out_attr->i == 2 && in_attr->i == 1)
4664 _bfd_error_handler
4665 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4666 else if (in_attr->i > 2)
4667 _bfd_error_handler
4668 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4669 in_attr->i);
4670 else
4671 _bfd_error_handler
4672 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4673 out_attr->i);
4674 }
4675
4676 /* Merge Tag_compatibility attributes and any common GNU ones. */
4677 _bfd_elf_merge_object_attributes (ibfd, obfd);
4678
4679 return TRUE;
4680 }
4681
4682 /* Merge backend specific data from an object file to the output
4683 object file when linking. */
4684
4685 static bfd_boolean
4686 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4687 {
4688 flagword old_flags;
4689 flagword new_flags;
4690 bfd_boolean error;
4691
4692 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4693 return TRUE;
4694
4695 /* Check if we have the same endianness. */
4696 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4697 return FALSE;
4698
4699 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4700 return FALSE;
4701
4702 new_flags = elf_elfheader (ibfd)->e_flags;
4703 old_flags = elf_elfheader (obfd)->e_flags;
4704 if (!elf_flags_init (obfd))
4705 {
4706 /* First call, no flags set. */
4707 elf_flags_init (obfd) = TRUE;
4708 elf_elfheader (obfd)->e_flags = new_flags;
4709 }
4710
4711 /* Compatible flags are ok. */
4712 else if (new_flags == old_flags)
4713 ;
4714
4715 /* Incompatible flags. */
4716 else
4717 {
4718 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4719 to be linked with either. */
4720 error = FALSE;
4721 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4722 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4723 {
4724 error = TRUE;
4725 (*_bfd_error_handler)
4726 (_("%B: compiled with -mrelocatable and linked with "
4727 "modules compiled normally"), ibfd);
4728 }
4729 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4730 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4731 {
4732 error = TRUE;
4733 (*_bfd_error_handler)
4734 (_("%B: compiled normally and linked with "
4735 "modules compiled with -mrelocatable"), ibfd);
4736 }
4737
4738 /* The output is -mrelocatable-lib iff both the input files are. */
4739 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4740 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4741
4742 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4743 but each input file is either -mrelocatable or -mrelocatable-lib. */
4744 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4745 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4746 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4747 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4748
4749 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4750 any module uses it. */
4751 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4752
4753 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4754 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4755
4756 /* Warn about any other mismatches. */
4757 if (new_flags != old_flags)
4758 {
4759 error = TRUE;
4760 (*_bfd_error_handler)
4761 (_("%B: uses different e_flags (0x%lx) fields "
4762 "than previous modules (0x%lx)"),
4763 ibfd, (long) new_flags, (long) old_flags);
4764 }
4765
4766 if (error)
4767 {
4768 bfd_set_error (bfd_error_bad_value);
4769 return FALSE;
4770 }
4771 }
4772
4773 return TRUE;
4774 }
4775
4776 static void
4777 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *loc,
4778 bfd_vma value,
4779 split16_format_type split16_format)
4780
4781 {
4782 unsigned int insn, top5;
4783
4784 insn = bfd_get_32 (output_bfd, loc);
4785 top5 = value & 0xf800;
4786 top5 = top5 << (split16_format == split16a_type ? 9 : 5);
4787 insn |= top5;
4788 insn |= value & 0x7ff;
4789 bfd_put_32 (output_bfd, insn, loc);
4790 }
4791
4792 \f
4793 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4794 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4795 int
4796 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4797 struct bfd_link_info *info)
4798 {
4799 struct ppc_elf_link_hash_table *htab;
4800 flagword flags;
4801
4802 htab = ppc_elf_hash_table (info);
4803
4804 if (htab->plt_type == PLT_UNSET)
4805 {
4806 struct elf_link_hash_entry *h;
4807
4808 if (htab->params->plt_style == PLT_OLD)
4809 htab->plt_type = PLT_OLD;
4810 else if (info->shared
4811 && htab->elf.dynamic_sections_created
4812 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4813 FALSE, FALSE, TRUE)) != NULL
4814 && (h->type == STT_FUNC
4815 || h->needs_plt)
4816 && h->ref_regular
4817 && !(SYMBOL_CALLS_LOCAL (info, h)
4818 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4819 && h->root.type == bfd_link_hash_undefweak)))
4820 {
4821 /* Profiling of shared libs (and pies) is not supported with
4822 secure plt, because ppc32 does profiling before a
4823 function prologue and a secure plt pic call stubs needs
4824 r30 to be set up. */
4825 htab->plt_type = PLT_OLD;
4826 }
4827 else
4828 {
4829 bfd *ibfd;
4830 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4831
4832 /* Look through the reloc flags left by ppc_elf_check_relocs.
4833 Use the old style bss plt if a file makes plt calls
4834 without using the new relocs, and if ld isn't given
4835 --secure-plt and we never see REL16 relocs. */
4836 if (plt_type == PLT_UNSET)
4837 plt_type = PLT_OLD;
4838 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
4839 if (is_ppc_elf (ibfd))
4840 {
4841 if (ppc_elf_tdata (ibfd)->has_rel16)
4842 plt_type = PLT_NEW;
4843 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4844 {
4845 plt_type = PLT_OLD;
4846 htab->old_bfd = ibfd;
4847 break;
4848 }
4849 }
4850 htab->plt_type = plt_type;
4851 }
4852 }
4853 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4854 {
4855 if (htab->old_bfd != NULL)
4856 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4857 htab->old_bfd);
4858 else
4859 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4860 }
4861
4862 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4863
4864 if (htab->plt_type == PLT_NEW)
4865 {
4866 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4867 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4868
4869 /* The new PLT is a loaded section. */
4870 if (htab->plt != NULL
4871 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4872 return -1;
4873
4874 /* The new GOT is not executable. */
4875 if (htab->got != NULL
4876 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4877 return -1;
4878 }
4879 else
4880 {
4881 /* Stop an unused .glink section from affecting .text alignment. */
4882 if (htab->glink != NULL
4883 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4884 return -1;
4885 }
4886 return htab->plt_type == PLT_NEW;
4887 }
4888 \f
4889 /* Return the section that should be marked against GC for a given
4890 relocation. */
4891
4892 static asection *
4893 ppc_elf_gc_mark_hook (asection *sec,
4894 struct bfd_link_info *info,
4895 Elf_Internal_Rela *rel,
4896 struct elf_link_hash_entry *h,
4897 Elf_Internal_Sym *sym)
4898 {
4899 if (h != NULL)
4900 switch (ELF32_R_TYPE (rel->r_info))
4901 {
4902 case R_PPC_GNU_VTINHERIT:
4903 case R_PPC_GNU_VTENTRY:
4904 return NULL;
4905 }
4906
4907 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4908 }
4909
4910 /* Update the got, plt and dynamic reloc reference counts for the
4911 section being removed. */
4912
4913 static bfd_boolean
4914 ppc_elf_gc_sweep_hook (bfd *abfd,
4915 struct bfd_link_info *info,
4916 asection *sec,
4917 const Elf_Internal_Rela *relocs)
4918 {
4919 struct ppc_elf_link_hash_table *htab;
4920 Elf_Internal_Shdr *symtab_hdr;
4921 struct elf_link_hash_entry **sym_hashes;
4922 bfd_signed_vma *local_got_refcounts;
4923 const Elf_Internal_Rela *rel, *relend;
4924 asection *got2;
4925
4926 if (info->relocatable)
4927 return TRUE;
4928
4929 if ((sec->flags & SEC_ALLOC) == 0)
4930 return TRUE;
4931
4932 elf_section_data (sec)->local_dynrel = NULL;
4933
4934 htab = ppc_elf_hash_table (info);
4935 symtab_hdr = &elf_symtab_hdr (abfd);
4936 sym_hashes = elf_sym_hashes (abfd);
4937 local_got_refcounts = elf_local_got_refcounts (abfd);
4938 got2 = bfd_get_section_by_name (abfd, ".got2");
4939
4940 relend = relocs + sec->reloc_count;
4941 for (rel = relocs; rel < relend; rel++)
4942 {
4943 unsigned long r_symndx;
4944 enum elf_ppc_reloc_type r_type;
4945 struct elf_link_hash_entry *h = NULL;
4946
4947 r_symndx = ELF32_R_SYM (rel->r_info);
4948 if (r_symndx >= symtab_hdr->sh_info)
4949 {
4950 struct elf_dyn_relocs **pp, *p;
4951 struct ppc_elf_link_hash_entry *eh;
4952
4953 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4954 while (h->root.type == bfd_link_hash_indirect
4955 || h->root.type == bfd_link_hash_warning)
4956 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4957 eh = (struct ppc_elf_link_hash_entry *) h;
4958
4959 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4960 if (p->sec == sec)
4961 {
4962 /* Everything must go for SEC. */
4963 *pp = p->next;
4964 break;
4965 }
4966 }
4967
4968 r_type = ELF32_R_TYPE (rel->r_info);
4969 if (!htab->is_vxworks
4970 && h == NULL
4971 && local_got_refcounts != NULL
4972 && (!info->shared
4973 || is_branch_reloc (r_type)))
4974 {
4975 struct plt_entry **local_plt = (struct plt_entry **)
4976 (local_got_refcounts + symtab_hdr->sh_info);
4977 char *local_got_tls_masks = (char *)
4978 (local_plt + symtab_hdr->sh_info);
4979 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4980 {
4981 struct plt_entry **ifunc = local_plt + r_symndx;
4982 bfd_vma addend = 0;
4983 struct plt_entry *ent;
4984
4985 if (r_type == R_PPC_PLTREL24 && info->shared)
4986 addend = rel->r_addend;
4987 ent = find_plt_ent (ifunc, got2, addend);
4988 if (ent->plt.refcount > 0)
4989 ent->plt.refcount -= 1;
4990 continue;
4991 }
4992 }
4993
4994 switch (r_type)
4995 {
4996 case R_PPC_GOT_TLSLD16:
4997 case R_PPC_GOT_TLSLD16_LO:
4998 case R_PPC_GOT_TLSLD16_HI:
4999 case R_PPC_GOT_TLSLD16_HA:
5000 case R_PPC_GOT_TLSGD16:
5001 case R_PPC_GOT_TLSGD16_LO:
5002 case R_PPC_GOT_TLSGD16_HI:
5003 case R_PPC_GOT_TLSGD16_HA:
5004 case R_PPC_GOT_TPREL16:
5005 case R_PPC_GOT_TPREL16_LO:
5006 case R_PPC_GOT_TPREL16_HI:
5007 case R_PPC_GOT_TPREL16_HA:
5008 case R_PPC_GOT_DTPREL16:
5009 case R_PPC_GOT_DTPREL16_LO:
5010 case R_PPC_GOT_DTPREL16_HI:
5011 case R_PPC_GOT_DTPREL16_HA:
5012 case R_PPC_GOT16:
5013 case R_PPC_GOT16_LO:
5014 case R_PPC_GOT16_HI:
5015 case R_PPC_GOT16_HA:
5016 if (h != NULL)
5017 {
5018 if (h->got.refcount > 0)
5019 h->got.refcount--;
5020 if (!info->shared)
5021 {
5022 struct plt_entry *ent;
5023
5024 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5025 if (ent != NULL && ent->plt.refcount > 0)
5026 ent->plt.refcount -= 1;
5027 }
5028 }
5029 else if (local_got_refcounts != NULL)
5030 {
5031 if (local_got_refcounts[r_symndx] > 0)
5032 local_got_refcounts[r_symndx]--;
5033 }
5034 break;
5035
5036 case R_PPC_REL24:
5037 case R_PPC_REL14:
5038 case R_PPC_REL14_BRTAKEN:
5039 case R_PPC_REL14_BRNTAKEN:
5040 case R_PPC_REL32:
5041 if (h == NULL || h == htab->elf.hgot)
5042 break;
5043 /* Fall thru */
5044
5045 case R_PPC_ADDR32:
5046 case R_PPC_ADDR24:
5047 case R_PPC_ADDR16:
5048 case R_PPC_ADDR16_LO:
5049 case R_PPC_ADDR16_HI:
5050 case R_PPC_ADDR16_HA:
5051 case R_PPC_ADDR14:
5052 case R_PPC_ADDR14_BRTAKEN:
5053 case R_PPC_ADDR14_BRNTAKEN:
5054 case R_PPC_UADDR32:
5055 case R_PPC_UADDR16:
5056 if (info->shared)
5057 break;
5058
5059 case R_PPC_PLT32:
5060 case R_PPC_PLTREL24:
5061 case R_PPC_PLTREL32:
5062 case R_PPC_PLT16_LO:
5063 case R_PPC_PLT16_HI:
5064 case R_PPC_PLT16_HA:
5065 if (h != NULL)
5066 {
5067 bfd_vma addend = 0;
5068 struct plt_entry *ent;
5069
5070 if (r_type == R_PPC_PLTREL24 && info->shared)
5071 addend = rel->r_addend;
5072 ent = find_plt_ent (&h->plt.plist, got2, addend);
5073 if (ent != NULL && ent->plt.refcount > 0)
5074 ent->plt.refcount -= 1;
5075 }
5076 break;
5077
5078 default:
5079 break;
5080 }
5081 }
5082 return TRUE;
5083 }
5084 \f
5085 /* Set plt output section type, htab->tls_get_addr, and call the
5086 generic ELF tls_setup function. */
5087
5088 asection *
5089 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5090 {
5091 struct ppc_elf_link_hash_table *htab;
5092
5093 htab = ppc_elf_hash_table (info);
5094 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5095 FALSE, FALSE, TRUE);
5096 if (!htab->params->no_tls_get_addr_opt)
5097 {
5098 struct elf_link_hash_entry *opt, *tga;
5099 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5100 FALSE, FALSE, TRUE);
5101 if (opt != NULL
5102 && (opt->root.type == bfd_link_hash_defined
5103 || opt->root.type == bfd_link_hash_defweak))
5104 {
5105 /* If glibc supports an optimized __tls_get_addr call stub,
5106 signalled by the presence of __tls_get_addr_opt, and we'll
5107 be calling __tls_get_addr via a plt call stub, then
5108 make __tls_get_addr point to __tls_get_addr_opt. */
5109 tga = htab->tls_get_addr;
5110 if (htab->elf.dynamic_sections_created
5111 && tga != NULL
5112 && (tga->type == STT_FUNC
5113 || tga->needs_plt)
5114 && !(SYMBOL_CALLS_LOCAL (info, tga)
5115 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5116 && tga->root.type == bfd_link_hash_undefweak)))
5117 {
5118 struct plt_entry *ent;
5119 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5120 if (ent->plt.refcount > 0)
5121 break;
5122 if (ent != NULL)
5123 {
5124 tga->root.type = bfd_link_hash_indirect;
5125 tga->root.u.i.link = &opt->root;
5126 ppc_elf_copy_indirect_symbol (info, opt, tga);
5127 if (opt->dynindx != -1)
5128 {
5129 /* Use __tls_get_addr_opt in dynamic relocations. */
5130 opt->dynindx = -1;
5131 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5132 opt->dynstr_index);
5133 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5134 return FALSE;
5135 }
5136 htab->tls_get_addr = opt;
5137 }
5138 }
5139 }
5140 else
5141 htab->params->no_tls_get_addr_opt = TRUE;
5142 }
5143 if (htab->plt_type == PLT_NEW
5144 && htab->plt != NULL
5145 && htab->plt->output_section != NULL)
5146 {
5147 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5148 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5149 }
5150
5151 return _bfd_elf_tls_setup (obfd, info);
5152 }
5153
5154 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5155 HASH. */
5156
5157 static bfd_boolean
5158 branch_reloc_hash_match (const bfd *ibfd,
5159 const Elf_Internal_Rela *rel,
5160 const struct elf_link_hash_entry *hash)
5161 {
5162 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5163 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5164 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5165
5166 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5167 {
5168 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5169 struct elf_link_hash_entry *h;
5170
5171 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5172 while (h->root.type == bfd_link_hash_indirect
5173 || h->root.type == bfd_link_hash_warning)
5174 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5175 if (h == hash)
5176 return TRUE;
5177 }
5178 return FALSE;
5179 }
5180
5181 /* Run through all the TLS relocs looking for optimization
5182 opportunities. */
5183
5184 bfd_boolean
5185 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5186 struct bfd_link_info *info)
5187 {
5188 bfd *ibfd;
5189 asection *sec;
5190 struct ppc_elf_link_hash_table *htab;
5191 int pass;
5192
5193 if (info->relocatable || !info->executable)
5194 return TRUE;
5195
5196 htab = ppc_elf_hash_table (info);
5197 if (htab == NULL)
5198 return FALSE;
5199
5200 /* Make two passes through the relocs. First time check that tls
5201 relocs involved in setting up a tls_get_addr call are indeed
5202 followed by such a call. If they are not, don't do any tls
5203 optimization. On the second pass twiddle tls_mask flags to
5204 notify relocate_section that optimization can be done, and
5205 adjust got and plt refcounts. */
5206 for (pass = 0; pass < 2; ++pass)
5207 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5208 {
5209 Elf_Internal_Sym *locsyms = NULL;
5210 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5211 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5212
5213 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5214 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5215 {
5216 Elf_Internal_Rela *relstart, *rel, *relend;
5217 int expecting_tls_get_addr = 0;
5218
5219 /* Read the relocations. */
5220 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5221 info->keep_memory);
5222 if (relstart == NULL)
5223 return FALSE;
5224
5225 relend = relstart + sec->reloc_count;
5226 for (rel = relstart; rel < relend; rel++)
5227 {
5228 enum elf_ppc_reloc_type r_type;
5229 unsigned long r_symndx;
5230 struct elf_link_hash_entry *h = NULL;
5231 char *tls_mask;
5232 char tls_set, tls_clear;
5233 bfd_boolean is_local;
5234 bfd_signed_vma *got_count;
5235
5236 r_symndx = ELF32_R_SYM (rel->r_info);
5237 if (r_symndx >= symtab_hdr->sh_info)
5238 {
5239 struct elf_link_hash_entry **sym_hashes;
5240
5241 sym_hashes = elf_sym_hashes (ibfd);
5242 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5243 while (h->root.type == bfd_link_hash_indirect
5244 || h->root.type == bfd_link_hash_warning)
5245 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5246 }
5247
5248 is_local = FALSE;
5249 if (h == NULL
5250 || !h->def_dynamic)
5251 is_local = TRUE;
5252
5253 r_type = ELF32_R_TYPE (rel->r_info);
5254 /* If this section has old-style __tls_get_addr calls
5255 without marker relocs, then check that each
5256 __tls_get_addr call reloc is preceded by a reloc
5257 that conceivably belongs to the __tls_get_addr arg
5258 setup insn. If we don't find matching arg setup
5259 relocs, don't do any tls optimization. */
5260 if (pass == 0
5261 && sec->has_tls_get_addr_call
5262 && h != NULL
5263 && h == htab->tls_get_addr
5264 && !expecting_tls_get_addr
5265 && is_branch_reloc (r_type))
5266 {
5267 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5268 "TLS optimization disabled\n",
5269 ibfd, sec, rel->r_offset);
5270 if (elf_section_data (sec)->relocs != relstart)
5271 free (relstart);
5272 return TRUE;
5273 }
5274
5275 expecting_tls_get_addr = 0;
5276 switch (r_type)
5277 {
5278 case R_PPC_GOT_TLSLD16:
5279 case R_PPC_GOT_TLSLD16_LO:
5280 expecting_tls_get_addr = 1;
5281 /* Fall thru */
5282
5283 case R_PPC_GOT_TLSLD16_HI:
5284 case R_PPC_GOT_TLSLD16_HA:
5285 /* These relocs should never be against a symbol
5286 defined in a shared lib. Leave them alone if
5287 that turns out to be the case. */
5288 if (!is_local)
5289 continue;
5290
5291 /* LD -> LE */
5292 tls_set = 0;
5293 tls_clear = TLS_LD;
5294 break;
5295
5296 case R_PPC_GOT_TLSGD16:
5297 case R_PPC_GOT_TLSGD16_LO:
5298 expecting_tls_get_addr = 1;
5299 /* Fall thru */
5300
5301 case R_PPC_GOT_TLSGD16_HI:
5302 case R_PPC_GOT_TLSGD16_HA:
5303 if (is_local)
5304 /* GD -> LE */
5305 tls_set = 0;
5306 else
5307 /* GD -> IE */
5308 tls_set = TLS_TLS | TLS_TPRELGD;
5309 tls_clear = TLS_GD;
5310 break;
5311
5312 case R_PPC_GOT_TPREL16:
5313 case R_PPC_GOT_TPREL16_LO:
5314 case R_PPC_GOT_TPREL16_HI:
5315 case R_PPC_GOT_TPREL16_HA:
5316 if (is_local)
5317 {
5318 /* IE -> LE */
5319 tls_set = 0;
5320 tls_clear = TLS_TPREL;
5321 break;
5322 }
5323 else
5324 continue;
5325
5326 case R_PPC_TLSGD:
5327 case R_PPC_TLSLD:
5328 expecting_tls_get_addr = 2;
5329 tls_set = 0;
5330 tls_clear = 0;
5331 break;
5332
5333 default:
5334 continue;
5335 }
5336
5337 if (pass == 0)
5338 {
5339 if (!expecting_tls_get_addr
5340 || (expecting_tls_get_addr == 1
5341 && !sec->has_tls_get_addr_call))
5342 continue;
5343
5344 if (rel + 1 < relend
5345 && branch_reloc_hash_match (ibfd, rel + 1,
5346 htab->tls_get_addr))
5347 continue;
5348
5349 /* Uh oh, we didn't find the expected call. We
5350 could just mark this symbol to exclude it
5351 from tls optimization but it's safer to skip
5352 the entire optimization. */
5353 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5354 "TLS optimization disabled\n"),
5355 ibfd, sec, rel->r_offset);
5356 if (elf_section_data (sec)->relocs != relstart)
5357 free (relstart);
5358 return TRUE;
5359 }
5360
5361 if (expecting_tls_get_addr)
5362 {
5363 struct plt_entry *ent;
5364 bfd_vma addend = 0;
5365
5366 if (info->shared
5367 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5368 addend = rel[1].r_addend;
5369 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5370 got2, addend);
5371 if (ent != NULL && ent->plt.refcount > 0)
5372 ent->plt.refcount -= 1;
5373
5374 if (expecting_tls_get_addr == 2)
5375 continue;
5376 }
5377
5378 if (h != NULL)
5379 {
5380 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5381 got_count = &h->got.refcount;
5382 }
5383 else
5384 {
5385 bfd_signed_vma *lgot_refs;
5386 struct plt_entry **local_plt;
5387 char *lgot_masks;
5388
5389 if (locsyms == NULL)
5390 {
5391 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5392 if (locsyms == NULL)
5393 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5394 symtab_hdr->sh_info,
5395 0, NULL, NULL, NULL);
5396 if (locsyms == NULL)
5397 {
5398 if (elf_section_data (sec)->relocs != relstart)
5399 free (relstart);
5400 return FALSE;
5401 }
5402 }
5403 lgot_refs = elf_local_got_refcounts (ibfd);
5404 if (lgot_refs == NULL)
5405 abort ();
5406 local_plt = (struct plt_entry **)
5407 (lgot_refs + symtab_hdr->sh_info);
5408 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5409 tls_mask = &lgot_masks[r_symndx];
5410 got_count = &lgot_refs[r_symndx];
5411 }
5412
5413 if (tls_set == 0)
5414 {
5415 /* We managed to get rid of a got entry. */
5416 if (*got_count > 0)
5417 *got_count -= 1;
5418 }
5419
5420 *tls_mask |= tls_set;
5421 *tls_mask &= ~tls_clear;
5422 }
5423
5424 if (elf_section_data (sec)->relocs != relstart)
5425 free (relstart);
5426 }
5427
5428 if (locsyms != NULL
5429 && (symtab_hdr->contents != (unsigned char *) locsyms))
5430 {
5431 if (!info->keep_memory)
5432 free (locsyms);
5433 else
5434 symtab_hdr->contents = (unsigned char *) locsyms;
5435 }
5436 }
5437 return TRUE;
5438 }
5439 \f
5440 /* Return true if we have dynamic relocs that apply to read-only sections. */
5441
5442 static bfd_boolean
5443 readonly_dynrelocs (struct elf_link_hash_entry *h)
5444 {
5445 struct elf_dyn_relocs *p;
5446
5447 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5448 {
5449 asection *s = p->sec->output_section;
5450
5451 if (s != NULL
5452 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5453 == (SEC_READONLY | SEC_ALLOC)))
5454 return TRUE;
5455 }
5456 return FALSE;
5457 }
5458
5459 /* Adjust a symbol defined by a dynamic object and referenced by a
5460 regular object. The current definition is in some section of the
5461 dynamic object, but we're not including those sections. We have to
5462 change the definition to something the rest of the link can
5463 understand. */
5464
5465 static bfd_boolean
5466 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5467 struct elf_link_hash_entry *h)
5468 {
5469 struct ppc_elf_link_hash_table *htab;
5470 asection *s;
5471
5472 #ifdef DEBUG
5473 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5474 h->root.root.string);
5475 #endif
5476
5477 /* Make sure we know what is going on here. */
5478 htab = ppc_elf_hash_table (info);
5479 BFD_ASSERT (htab->elf.dynobj != NULL
5480 && (h->needs_plt
5481 || h->type == STT_GNU_IFUNC
5482 || h->u.weakdef != NULL
5483 || (h->def_dynamic
5484 && h->ref_regular
5485 && !h->def_regular)));
5486
5487 /* Deal with function syms. */
5488 if (h->type == STT_FUNC
5489 || h->type == STT_GNU_IFUNC
5490 || h->needs_plt)
5491 {
5492 /* Clear procedure linkage table information for any symbol that
5493 won't need a .plt entry. */
5494 struct plt_entry *ent;
5495 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5496 if (ent->plt.refcount > 0)
5497 break;
5498 if (ent == NULL
5499 || (h->type != STT_GNU_IFUNC
5500 && (SYMBOL_CALLS_LOCAL (info, h)
5501 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5502 && h->root.type == bfd_link_hash_undefweak))))
5503 {
5504 /* A PLT entry is not required/allowed when:
5505
5506 1. We are not using ld.so; because then the PLT entry
5507 can't be set up, so we can't use one. In this case,
5508 ppc_elf_adjust_dynamic_symbol won't even be called.
5509
5510 2. GC has rendered the entry unused.
5511
5512 3. We know for certain that a call to this symbol
5513 will go to this object, or will remain undefined. */
5514 h->plt.plist = NULL;
5515 h->needs_plt = 0;
5516 h->pointer_equality_needed = 0;
5517 }
5518 else
5519 {
5520 /* Taking a function's address in a read/write section
5521 doesn't require us to define the function symbol in the
5522 executable on a plt call stub. A dynamic reloc can
5523 be used instead. */
5524 if (h->pointer_equality_needed
5525 && h->type != STT_GNU_IFUNC
5526 && !htab->is_vxworks
5527 && !ppc_elf_hash_entry (h)->has_sda_refs
5528 && !readonly_dynrelocs (h))
5529 {
5530 h->pointer_equality_needed = 0;
5531 h->non_got_ref = 0;
5532 }
5533
5534 /* After adjust_dynamic_symbol, non_got_ref set in the
5535 non-shared case means that we have allocated space in
5536 .dynbss for the symbol and thus dyn_relocs for this
5537 symbol should be discarded.
5538 If we get here we know we are making a PLT entry for this
5539 symbol, and in an executable we'd normally resolve
5540 relocations against this symbol to the PLT entry. Allow
5541 dynamic relocs if the reference is weak, and the dynamic
5542 relocs will not cause text relocation. */
5543 else if (!h->ref_regular_nonweak
5544 && h->non_got_ref
5545 && h->type != STT_GNU_IFUNC
5546 && !htab->is_vxworks
5547 && !ppc_elf_hash_entry (h)->has_sda_refs
5548 && !readonly_dynrelocs (h))
5549 h->non_got_ref = 0;
5550 }
5551 return TRUE;
5552 }
5553 else
5554 h->plt.plist = NULL;
5555
5556 /* If this is a weak symbol, and there is a real definition, the
5557 processor independent code will have arranged for us to see the
5558 real definition first, and we can just use the same value. */
5559 if (h->u.weakdef != NULL)
5560 {
5561 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5562 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5563 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5564 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5565 if (ELIMINATE_COPY_RELOCS)
5566 h->non_got_ref = h->u.weakdef->non_got_ref;
5567 return TRUE;
5568 }
5569
5570 /* This is a reference to a symbol defined by a dynamic object which
5571 is not a function. */
5572
5573 /* If we are creating a shared library, we must presume that the
5574 only references to the symbol are via the global offset table.
5575 For such cases we need not do anything here; the relocations will
5576 be handled correctly by relocate_section. */
5577 if (info->shared)
5578 return TRUE;
5579
5580 /* If there are no references to this symbol that do not use the
5581 GOT, we don't need to generate a copy reloc. */
5582 if (!h->non_got_ref)
5583 return TRUE;
5584
5585 /* If -z nocopyreloc was given, we won't generate them either. */
5586 if (info->nocopyreloc)
5587 {
5588 h->non_got_ref = 0;
5589 return TRUE;
5590 }
5591
5592 /* If we didn't find any dynamic relocs in read-only sections, then
5593 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5594 We can't do this if there are any small data relocations. This
5595 doesn't work on VxWorks, where we can not have dynamic
5596 relocations (other than copy and jump slot relocations) in an
5597 executable. */
5598 if (ELIMINATE_COPY_RELOCS
5599 && !ppc_elf_hash_entry (h)->has_sda_refs
5600 && !htab->is_vxworks
5601 && !h->def_regular
5602 && !readonly_dynrelocs (h))
5603 {
5604 h->non_got_ref = 0;
5605 return TRUE;
5606 }
5607
5608 /* Protected variables do not work with .dynbss. The copy in
5609 .dynbss won't be used by the shared library with the protected
5610 definition for the variable. Text relocations are preferable
5611 to an incorrect program. */
5612 if (h->protected_def)
5613 {
5614 h->non_got_ref = 0;
5615 return TRUE;
5616 }
5617
5618 /* We must allocate the symbol in our .dynbss section, which will
5619 become part of the .bss section of the executable. There will be
5620 an entry for this symbol in the .dynsym section. The dynamic
5621 object will contain position independent code, so all references
5622 from the dynamic object to this symbol will go through the global
5623 offset table. The dynamic linker will use the .dynsym entry to
5624 determine the address it must put in the global offset table, so
5625 both the dynamic object and the regular object will refer to the
5626 same memory location for the variable.
5627
5628 Of course, if the symbol is referenced using SDAREL relocs, we
5629 must instead allocate it in .sbss. */
5630
5631 if (ppc_elf_hash_entry (h)->has_sda_refs)
5632 s = htab->dynsbss;
5633 else
5634 s = htab->dynbss;
5635 BFD_ASSERT (s != NULL);
5636
5637 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5638 copy the initial value out of the dynamic object and into the
5639 runtime process image. We need to remember the offset into the
5640 .rela.bss section we are going to use. */
5641 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5642 {
5643 asection *srel;
5644
5645 if (ppc_elf_hash_entry (h)->has_sda_refs)
5646 srel = htab->relsbss;
5647 else
5648 srel = htab->relbss;
5649 BFD_ASSERT (srel != NULL);
5650 srel->size += sizeof (Elf32_External_Rela);
5651 h->needs_copy = 1;
5652 }
5653
5654 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5655 }
5656 \f
5657 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5658 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5659 specifying the addend on the plt relocation. For -fpic code, the sym
5660 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5661 xxxxxxxx.got2.plt_pic32.<callee>. */
5662
5663 static bfd_boolean
5664 add_stub_sym (struct plt_entry *ent,
5665 struct elf_link_hash_entry *h,
5666 struct bfd_link_info *info)
5667 {
5668 struct elf_link_hash_entry *sh;
5669 size_t len1, len2, len3;
5670 char *name;
5671 const char *stub;
5672 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5673
5674 if (info->shared)
5675 stub = ".plt_pic32.";
5676 else
5677 stub = ".plt_call32.";
5678
5679 len1 = strlen (h->root.root.string);
5680 len2 = strlen (stub);
5681 len3 = 0;
5682 if (ent->sec)
5683 len3 = strlen (ent->sec->name);
5684 name = bfd_malloc (len1 + len2 + len3 + 9);
5685 if (name == NULL)
5686 return FALSE;
5687 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5688 if (ent->sec)
5689 memcpy (name + 8, ent->sec->name, len3);
5690 memcpy (name + 8 + len3, stub, len2);
5691 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5692 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5693 if (sh == NULL)
5694 return FALSE;
5695 if (sh->root.type == bfd_link_hash_new)
5696 {
5697 sh->root.type = bfd_link_hash_defined;
5698 sh->root.u.def.section = htab->glink;
5699 sh->root.u.def.value = ent->glink_offset;
5700 sh->ref_regular = 1;
5701 sh->def_regular = 1;
5702 sh->ref_regular_nonweak = 1;
5703 sh->forced_local = 1;
5704 sh->non_elf = 0;
5705 sh->root.linker_def = 1;
5706 }
5707 return TRUE;
5708 }
5709
5710 /* Allocate NEED contiguous space in .got, and return the offset.
5711 Handles allocation of the got header when crossing 32k. */
5712
5713 static bfd_vma
5714 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5715 {
5716 bfd_vma where;
5717 unsigned int max_before_header;
5718
5719 if (htab->plt_type == PLT_VXWORKS)
5720 {
5721 where = htab->got->size;
5722 htab->got->size += need;
5723 }
5724 else
5725 {
5726 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5727 if (need <= htab->got_gap)
5728 {
5729 where = max_before_header - htab->got_gap;
5730 htab->got_gap -= need;
5731 }
5732 else
5733 {
5734 if (htab->got->size + need > max_before_header
5735 && htab->got->size <= max_before_header)
5736 {
5737 htab->got_gap = max_before_header - htab->got->size;
5738 htab->got->size = max_before_header + htab->got_header_size;
5739 }
5740 where = htab->got->size;
5741 htab->got->size += need;
5742 }
5743 }
5744 return where;
5745 }
5746
5747 /* Allocate space in associated reloc sections for dynamic relocs. */
5748
5749 static bfd_boolean
5750 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5751 {
5752 struct bfd_link_info *info = inf;
5753 struct ppc_elf_link_hash_entry *eh;
5754 struct ppc_elf_link_hash_table *htab;
5755 struct elf_dyn_relocs *p;
5756
5757 if (h->root.type == bfd_link_hash_indirect)
5758 return TRUE;
5759
5760 htab = ppc_elf_hash_table (info);
5761 if (htab->elf.dynamic_sections_created
5762 || h->type == STT_GNU_IFUNC)
5763 {
5764 struct plt_entry *ent;
5765 bfd_boolean doneone = FALSE;
5766 bfd_vma plt_offset = 0, glink_offset = 0;
5767 bfd_boolean dyn;
5768
5769 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5770 if (ent->plt.refcount > 0)
5771 {
5772 /* Make sure this symbol is output as a dynamic symbol. */
5773 if (h->dynindx == -1
5774 && !h->forced_local
5775 && !h->def_regular
5776 && htab->elf.dynamic_sections_created)
5777 {
5778 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5779 return FALSE;
5780 }
5781
5782 dyn = htab->elf.dynamic_sections_created;
5783 if (info->shared
5784 || h->type == STT_GNU_IFUNC
5785 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5786 {
5787 asection *s = htab->plt;
5788 if (!dyn || h->dynindx == -1)
5789 s = htab->iplt;
5790
5791 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5792 {
5793 if (!doneone)
5794 {
5795 plt_offset = s->size;
5796 s->size += 4;
5797 }
5798 ent->plt.offset = plt_offset;
5799
5800 s = htab->glink;
5801 if (!doneone || info->shared)
5802 {
5803 glink_offset = s->size;
5804 s->size += GLINK_ENTRY_SIZE;
5805 if (h == htab->tls_get_addr
5806 && !htab->params->no_tls_get_addr_opt)
5807 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5808 }
5809 if (!doneone
5810 && !info->shared
5811 && h->def_dynamic
5812 && !h->def_regular)
5813 {
5814 h->root.u.def.section = s;
5815 h->root.u.def.value = glink_offset;
5816 }
5817 ent->glink_offset = glink_offset;
5818
5819 if (htab->params->emit_stub_syms
5820 && !add_stub_sym (ent, h, info))
5821 return FALSE;
5822 }
5823 else
5824 {
5825 if (!doneone)
5826 {
5827 /* If this is the first .plt entry, make room
5828 for the special first entry. */
5829 if (s->size == 0)
5830 s->size += htab->plt_initial_entry_size;
5831
5832 /* The PowerPC PLT is actually composed of two
5833 parts, the first part is 2 words (for a load
5834 and a jump), and then there is a remaining
5835 word available at the end. */
5836 plt_offset = (htab->plt_initial_entry_size
5837 + (htab->plt_slot_size
5838 * ((s->size
5839 - htab->plt_initial_entry_size)
5840 / htab->plt_entry_size)));
5841
5842 /* If this symbol is not defined in a regular
5843 file, and we are not generating a shared
5844 library, then set the symbol to this location
5845 in the .plt. This is to avoid text
5846 relocations, and is required to make
5847 function pointers compare as equal between
5848 the normal executable and the shared library. */
5849 if (! info->shared
5850 && h->def_dynamic
5851 && !h->def_regular)
5852 {
5853 h->root.u.def.section = s;
5854 h->root.u.def.value = plt_offset;
5855 }
5856
5857 /* Make room for this entry. */
5858 s->size += htab->plt_entry_size;
5859 /* After the 8192nd entry, room for two entries
5860 is allocated. */
5861 if (htab->plt_type == PLT_OLD
5862 && (s->size - htab->plt_initial_entry_size)
5863 / htab->plt_entry_size
5864 > PLT_NUM_SINGLE_ENTRIES)
5865 s->size += htab->plt_entry_size;
5866 }
5867 ent->plt.offset = plt_offset;
5868 }
5869
5870 /* We also need to make an entry in the .rela.plt section. */
5871 if (!doneone)
5872 {
5873 if (!htab->elf.dynamic_sections_created
5874 || h->dynindx == -1)
5875 htab->reliplt->size += sizeof (Elf32_External_Rela);
5876 else
5877 {
5878 htab->relplt->size += sizeof (Elf32_External_Rela);
5879
5880 if (htab->plt_type == PLT_VXWORKS)
5881 {
5882 /* Allocate space for the unloaded relocations. */
5883 if (!info->shared
5884 && htab->elf.dynamic_sections_created)
5885 {
5886 if (ent->plt.offset
5887 == (bfd_vma) htab->plt_initial_entry_size)
5888 {
5889 htab->srelplt2->size
5890 += (sizeof (Elf32_External_Rela)
5891 * VXWORKS_PLTRESOLVE_RELOCS);
5892 }
5893
5894 htab->srelplt2->size
5895 += (sizeof (Elf32_External_Rela)
5896 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5897 }
5898
5899 /* Every PLT entry has an associated GOT entry in
5900 .got.plt. */
5901 htab->sgotplt->size += 4;
5902 }
5903 }
5904 doneone = TRUE;
5905 }
5906 }
5907 else
5908 ent->plt.offset = (bfd_vma) -1;
5909 }
5910 else
5911 ent->plt.offset = (bfd_vma) -1;
5912
5913 if (!doneone)
5914 {
5915 h->plt.plist = NULL;
5916 h->needs_plt = 0;
5917 }
5918 }
5919 else
5920 {
5921 h->plt.plist = NULL;
5922 h->needs_plt = 0;
5923 }
5924
5925 eh = (struct ppc_elf_link_hash_entry *) h;
5926 if (eh->elf.got.refcount > 0)
5927 {
5928 bfd_boolean dyn;
5929 unsigned int need;
5930
5931 /* Make sure this symbol is output as a dynamic symbol. */
5932 if (eh->elf.dynindx == -1
5933 && !eh->elf.forced_local
5934 && eh->elf.type != STT_GNU_IFUNC
5935 && htab->elf.dynamic_sections_created)
5936 {
5937 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5938 return FALSE;
5939 }
5940
5941 need = 0;
5942 if ((eh->tls_mask & TLS_TLS) != 0)
5943 {
5944 if ((eh->tls_mask & TLS_LD) != 0)
5945 {
5946 if (!eh->elf.def_dynamic)
5947 /* We'll just use htab->tlsld_got.offset. This should
5948 always be the case. It's a little odd if we have
5949 a local dynamic reloc against a non-local symbol. */
5950 htab->tlsld_got.refcount += 1;
5951 else
5952 need += 8;
5953 }
5954 if ((eh->tls_mask & TLS_GD) != 0)
5955 need += 8;
5956 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5957 need += 4;
5958 if ((eh->tls_mask & TLS_DTPREL) != 0)
5959 need += 4;
5960 }
5961 else
5962 need += 4;
5963 if (need == 0)
5964 eh->elf.got.offset = (bfd_vma) -1;
5965 else
5966 {
5967 eh->elf.got.offset = allocate_got (htab, need);
5968 dyn = htab->elf.dynamic_sections_created;
5969 if ((info->shared
5970 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5971 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5972 || eh->elf.root.type != bfd_link_hash_undefweak))
5973 {
5974 asection *rsec = htab->relgot;
5975
5976 if (eh->elf.type == STT_GNU_IFUNC)
5977 rsec = htab->reliplt;
5978 /* All the entries we allocated need relocs.
5979 Except LD only needs one. */
5980 if ((eh->tls_mask & TLS_LD) != 0
5981 && eh->elf.def_dynamic)
5982 need -= 4;
5983 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5984 }
5985 }
5986 }
5987 else
5988 eh->elf.got.offset = (bfd_vma) -1;
5989
5990 if (eh->dyn_relocs == NULL
5991 || !htab->elf.dynamic_sections_created)
5992 return TRUE;
5993
5994 /* In the shared -Bsymbolic case, discard space allocated for
5995 dynamic pc-relative relocs against symbols which turn out to be
5996 defined in regular objects. For the normal shared case, discard
5997 space for relocs that have become local due to symbol visibility
5998 changes. */
5999
6000 if (info->shared)
6001 {
6002 /* Relocs that use pc_count are those that appear on a call insn,
6003 or certain REL relocs (see must_be_dyn_reloc) that can be
6004 generated via assembly. We want calls to protected symbols to
6005 resolve directly to the function rather than going via the plt.
6006 If people want function pointer comparisons to work as expected
6007 then they should avoid writing weird assembly. */
6008 if (SYMBOL_CALLS_LOCAL (info, h))
6009 {
6010 struct elf_dyn_relocs **pp;
6011
6012 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6013 {
6014 p->count -= p->pc_count;
6015 p->pc_count = 0;
6016 if (p->count == 0)
6017 *pp = p->next;
6018 else
6019 pp = &p->next;
6020 }
6021 }
6022
6023 if (htab->is_vxworks)
6024 {
6025 struct elf_dyn_relocs **pp;
6026
6027 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6028 {
6029 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6030 *pp = p->next;
6031 else
6032 pp = &p->next;
6033 }
6034 }
6035
6036 /* Discard relocs on undefined symbols that must be local. */
6037 if (eh->dyn_relocs != NULL
6038 && h->root.type == bfd_link_hash_undefined
6039 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6040 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6041 eh->dyn_relocs = NULL;
6042
6043 /* Also discard relocs on undefined weak syms with non-default
6044 visibility. */
6045 if (eh->dyn_relocs != NULL
6046 && h->root.type == bfd_link_hash_undefweak)
6047 {
6048 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6049 eh->dyn_relocs = NULL;
6050
6051 /* Make sure undefined weak symbols are output as a dynamic
6052 symbol in PIEs. */
6053 else if (h->dynindx == -1
6054 && !h->forced_local
6055 && !h->def_regular)
6056 {
6057 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6058 return FALSE;
6059 }
6060 }
6061 }
6062 else if (ELIMINATE_COPY_RELOCS)
6063 {
6064 /* For the non-shared case, discard space for relocs against
6065 symbols which turn out to need copy relocs or are not
6066 dynamic. */
6067
6068 if (!h->non_got_ref
6069 && !h->def_regular)
6070 {
6071 /* Make sure this symbol is output as a dynamic symbol.
6072 Undefined weak syms won't yet be marked as dynamic. */
6073 if (h->dynindx == -1
6074 && !h->forced_local)
6075 {
6076 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6077 return FALSE;
6078 }
6079
6080 /* If that succeeded, we know we'll be keeping all the
6081 relocs. */
6082 if (h->dynindx != -1)
6083 goto keep;
6084 }
6085
6086 eh->dyn_relocs = NULL;
6087
6088 keep: ;
6089 }
6090
6091 /* Finally, allocate space. */
6092 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6093 {
6094 asection *sreloc = elf_section_data (p->sec)->sreloc;
6095 if (eh->elf.type == STT_GNU_IFUNC)
6096 sreloc = htab->reliplt;
6097 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6098 }
6099
6100 return TRUE;
6101 }
6102
6103 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6104 read-only sections. */
6105
6106 static bfd_boolean
6107 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6108 {
6109 if (h->root.type == bfd_link_hash_indirect)
6110 return TRUE;
6111
6112 if (readonly_dynrelocs (h))
6113 {
6114 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6115
6116 /* Not an error, just cut short the traversal. */
6117 return FALSE;
6118 }
6119 return TRUE;
6120 }
6121
6122 static const unsigned char glink_eh_frame_cie[] =
6123 {
6124 0, 0, 0, 16, /* length. */
6125 0, 0, 0, 0, /* id. */
6126 1, /* CIE version. */
6127 'z', 'R', 0, /* Augmentation string. */
6128 4, /* Code alignment. */
6129 0x7c, /* Data alignment. */
6130 65, /* RA reg. */
6131 1, /* Augmentation size. */
6132 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6133 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6134 };
6135
6136 /* Set the sizes of the dynamic sections. */
6137
6138 static bfd_boolean
6139 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6140 struct bfd_link_info *info)
6141 {
6142 struct ppc_elf_link_hash_table *htab;
6143 asection *s;
6144 bfd_boolean relocs;
6145 bfd *ibfd;
6146
6147 #ifdef DEBUG
6148 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6149 #endif
6150
6151 htab = ppc_elf_hash_table (info);
6152 BFD_ASSERT (htab->elf.dynobj != NULL);
6153
6154 if (elf_hash_table (info)->dynamic_sections_created)
6155 {
6156 /* Set the contents of the .interp section to the interpreter. */
6157 if (info->executable)
6158 {
6159 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6160 BFD_ASSERT (s != NULL);
6161 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6162 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6163 }
6164 }
6165
6166 if (htab->plt_type == PLT_OLD)
6167 htab->got_header_size = 16;
6168 else if (htab->plt_type == PLT_NEW)
6169 htab->got_header_size = 12;
6170
6171 /* Set up .got offsets for local syms, and space for local dynamic
6172 relocs. */
6173 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6174 {
6175 bfd_signed_vma *local_got;
6176 bfd_signed_vma *end_local_got;
6177 struct plt_entry **local_plt;
6178 struct plt_entry **end_local_plt;
6179 char *lgot_masks;
6180 bfd_size_type locsymcount;
6181 Elf_Internal_Shdr *symtab_hdr;
6182
6183 if (!is_ppc_elf (ibfd))
6184 continue;
6185
6186 for (s = ibfd->sections; s != NULL; s = s->next)
6187 {
6188 struct ppc_dyn_relocs *p;
6189
6190 for (p = ((struct ppc_dyn_relocs *)
6191 elf_section_data (s)->local_dynrel);
6192 p != NULL;
6193 p = p->next)
6194 {
6195 if (!bfd_is_abs_section (p->sec)
6196 && bfd_is_abs_section (p->sec->output_section))
6197 {
6198 /* Input section has been discarded, either because
6199 it is a copy of a linkonce section or due to
6200 linker script /DISCARD/, so we'll be discarding
6201 the relocs too. */
6202 }
6203 else if (htab->is_vxworks
6204 && strcmp (p->sec->output_section->name,
6205 ".tls_vars") == 0)
6206 {
6207 /* Relocations in vxworks .tls_vars sections are
6208 handled specially by the loader. */
6209 }
6210 else if (p->count != 0)
6211 {
6212 asection *sreloc = elf_section_data (p->sec)->sreloc;
6213 if (p->ifunc)
6214 sreloc = htab->reliplt;
6215 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6216 if ((p->sec->output_section->flags
6217 & (SEC_READONLY | SEC_ALLOC))
6218 == (SEC_READONLY | SEC_ALLOC))
6219 info->flags |= DF_TEXTREL;
6220 }
6221 }
6222 }
6223
6224 local_got = elf_local_got_refcounts (ibfd);
6225 if (!local_got)
6226 continue;
6227
6228 symtab_hdr = &elf_symtab_hdr (ibfd);
6229 locsymcount = symtab_hdr->sh_info;
6230 end_local_got = local_got + locsymcount;
6231 local_plt = (struct plt_entry **) end_local_got;
6232 end_local_plt = local_plt + locsymcount;
6233 lgot_masks = (char *) end_local_plt;
6234
6235 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6236 if (*local_got > 0)
6237 {
6238 unsigned int need = 0;
6239 if ((*lgot_masks & TLS_TLS) != 0)
6240 {
6241 if ((*lgot_masks & TLS_GD) != 0)
6242 need += 8;
6243 if ((*lgot_masks & TLS_LD) != 0)
6244 htab->tlsld_got.refcount += 1;
6245 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6246 need += 4;
6247 if ((*lgot_masks & TLS_DTPREL) != 0)
6248 need += 4;
6249 }
6250 else
6251 need += 4;
6252 if (need == 0)
6253 *local_got = (bfd_vma) -1;
6254 else
6255 {
6256 *local_got = allocate_got (htab, need);
6257 if (info->shared)
6258 {
6259 asection *srel = htab->relgot;
6260 if ((*lgot_masks & PLT_IFUNC) != 0)
6261 srel = htab->reliplt;
6262 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6263 }
6264 }
6265 }
6266 else
6267 *local_got = (bfd_vma) -1;
6268
6269 if (htab->is_vxworks)
6270 continue;
6271
6272 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6273 for (; local_plt < end_local_plt; ++local_plt)
6274 {
6275 struct plt_entry *ent;
6276 bfd_boolean doneone = FALSE;
6277 bfd_vma plt_offset = 0, glink_offset = 0;
6278
6279 for (ent = *local_plt; ent != NULL; ent = ent->next)
6280 if (ent->plt.refcount > 0)
6281 {
6282 s = htab->iplt;
6283
6284 if (!doneone)
6285 {
6286 plt_offset = s->size;
6287 s->size += 4;
6288 }
6289 ent->plt.offset = plt_offset;
6290
6291 s = htab->glink;
6292 if (!doneone || info->shared)
6293 {
6294 glink_offset = s->size;
6295 s->size += GLINK_ENTRY_SIZE;
6296 }
6297 ent->glink_offset = glink_offset;
6298
6299 if (!doneone)
6300 {
6301 htab->reliplt->size += sizeof (Elf32_External_Rela);
6302 doneone = TRUE;
6303 }
6304 }
6305 else
6306 ent->plt.offset = (bfd_vma) -1;
6307 }
6308 }
6309
6310 /* Allocate space for global sym dynamic relocs. */
6311 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6312
6313 if (htab->tlsld_got.refcount > 0)
6314 {
6315 htab->tlsld_got.offset = allocate_got (htab, 8);
6316 if (info->shared)
6317 htab->relgot->size += sizeof (Elf32_External_Rela);
6318 }
6319 else
6320 htab->tlsld_got.offset = (bfd_vma) -1;
6321
6322 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6323 {
6324 unsigned int g_o_t = 32768;
6325
6326 /* If we haven't allocated the header, do so now. When we get here,
6327 for old plt/got the got size will be 0 to 32764 (not allocated),
6328 or 32780 to 65536 (header allocated). For new plt/got, the
6329 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6330 if (htab->got->size <= 32768)
6331 {
6332 g_o_t = htab->got->size;
6333 if (htab->plt_type == PLT_OLD)
6334 g_o_t += 4;
6335 htab->got->size += htab->got_header_size;
6336 }
6337
6338 htab->elf.hgot->root.u.def.value = g_o_t;
6339 }
6340 if (info->shared)
6341 {
6342 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6343
6344 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6345 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6346 }
6347 if (info->emitrelocations)
6348 {
6349 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6350
6351 if (sda != NULL && sda->ref_regular)
6352 sda->root.u.def.section->flags |= SEC_KEEP;
6353 sda = htab->sdata[1].sym;
6354 if (sda != NULL && sda->ref_regular)
6355 sda->root.u.def.section->flags |= SEC_KEEP;
6356 }
6357
6358 if (htab->glink != NULL
6359 && htab->glink->size != 0
6360 && htab->elf.dynamic_sections_created)
6361 {
6362 htab->glink_pltresolve = htab->glink->size;
6363 /* Space for the branch table. */
6364 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6365 /* Pad out to align the start of PLTresolve. */
6366 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6367 ? 63 : 15);
6368 htab->glink->size += GLINK_PLTRESOLVE;
6369
6370 if (htab->params->emit_stub_syms)
6371 {
6372 struct elf_link_hash_entry *sh;
6373 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6374 TRUE, FALSE, FALSE);
6375 if (sh == NULL)
6376 return FALSE;
6377 if (sh->root.type == bfd_link_hash_new)
6378 {
6379 sh->root.type = bfd_link_hash_defined;
6380 sh->root.u.def.section = htab->glink;
6381 sh->root.u.def.value = htab->glink_pltresolve;
6382 sh->ref_regular = 1;
6383 sh->def_regular = 1;
6384 sh->ref_regular_nonweak = 1;
6385 sh->forced_local = 1;
6386 sh->non_elf = 0;
6387 sh->root.linker_def = 1;
6388 }
6389 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6390 TRUE, FALSE, FALSE);
6391 if (sh == NULL)
6392 return FALSE;
6393 if (sh->root.type == bfd_link_hash_new)
6394 {
6395 sh->root.type = bfd_link_hash_defined;
6396 sh->root.u.def.section = htab->glink;
6397 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6398 sh->ref_regular = 1;
6399 sh->def_regular = 1;
6400 sh->ref_regular_nonweak = 1;
6401 sh->forced_local = 1;
6402 sh->non_elf = 0;
6403 sh->root.linker_def = 1;
6404 }
6405 }
6406 }
6407
6408 if (htab->glink != NULL
6409 && htab->glink->size != 0
6410 && htab->glink_eh_frame != NULL
6411 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6412 && _bfd_elf_eh_frame_present (info))
6413 {
6414 s = htab->glink_eh_frame;
6415 s->size = sizeof (glink_eh_frame_cie) + 20;
6416 if (info->shared)
6417 {
6418 s->size += 4;
6419 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6420 s->size += 4;
6421 }
6422 }
6423
6424 /* We've now determined the sizes of the various dynamic sections.
6425 Allocate memory for them. */
6426 relocs = FALSE;
6427 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6428 {
6429 bfd_boolean strip_section = TRUE;
6430
6431 if ((s->flags & SEC_LINKER_CREATED) == 0)
6432 continue;
6433
6434 if (s == htab->plt
6435 || s == htab->got)
6436 {
6437 /* We'd like to strip these sections if they aren't needed, but if
6438 we've exported dynamic symbols from them we must leave them.
6439 It's too late to tell BFD to get rid of the symbols. */
6440 if (htab->elf.hplt != NULL)
6441 strip_section = FALSE;
6442 /* Strip this section if we don't need it; see the
6443 comment below. */
6444 }
6445 else if (s == htab->iplt
6446 || s == htab->glink
6447 || s == htab->glink_eh_frame
6448 || s == htab->sgotplt
6449 || s == htab->sbss
6450 || s == htab->dynbss
6451 || s == htab->dynsbss)
6452 {
6453 /* Strip these too. */
6454 }
6455 else if (s == htab->sdata[0].section
6456 || s == htab->sdata[1].section)
6457 {
6458 strip_section = (s->flags & SEC_KEEP) == 0;
6459 }
6460 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6461 ".rela"))
6462 {
6463 if (s->size != 0)
6464 {
6465 /* Remember whether there are any relocation sections. */
6466 relocs = TRUE;
6467
6468 /* We use the reloc_count field as a counter if we need
6469 to copy relocs into the output file. */
6470 s->reloc_count = 0;
6471 }
6472 }
6473 else
6474 {
6475 /* It's not one of our sections, so don't allocate space. */
6476 continue;
6477 }
6478
6479 if (s->size == 0 && strip_section)
6480 {
6481 /* If we don't need this section, strip it from the
6482 output file. This is mostly to handle .rela.bss and
6483 .rela.plt. We must create both sections in
6484 create_dynamic_sections, because they must be created
6485 before the linker maps input sections to output
6486 sections. The linker does that before
6487 adjust_dynamic_symbol is called, and it is that
6488 function which decides whether anything needs to go
6489 into these sections. */
6490 s->flags |= SEC_EXCLUDE;
6491 continue;
6492 }
6493
6494 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6495 continue;
6496
6497 /* Allocate memory for the section contents. */
6498 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6499 if (s->contents == NULL)
6500 return FALSE;
6501 }
6502
6503 if (htab->elf.dynamic_sections_created)
6504 {
6505 /* Add some entries to the .dynamic section. We fill in the
6506 values later, in ppc_elf_finish_dynamic_sections, but we
6507 must add the entries now so that we get the correct size for
6508 the .dynamic section. The DT_DEBUG entry is filled in by the
6509 dynamic linker and used by the debugger. */
6510 #define add_dynamic_entry(TAG, VAL) \
6511 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6512
6513 if (info->executable)
6514 {
6515 if (!add_dynamic_entry (DT_DEBUG, 0))
6516 return FALSE;
6517 }
6518
6519 if (htab->plt != NULL && htab->plt->size != 0)
6520 {
6521 if (!add_dynamic_entry (DT_PLTGOT, 0)
6522 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6523 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6524 || !add_dynamic_entry (DT_JMPREL, 0))
6525 return FALSE;
6526 }
6527
6528 if (htab->plt_type == PLT_NEW
6529 && htab->glink != NULL
6530 && htab->glink->size != 0)
6531 {
6532 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6533 return FALSE;
6534 if (!htab->params->no_tls_get_addr_opt
6535 && htab->tls_get_addr != NULL
6536 && htab->tls_get_addr->plt.plist != NULL
6537 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6538 return FALSE;
6539 }
6540
6541 if (relocs)
6542 {
6543 if (!add_dynamic_entry (DT_RELA, 0)
6544 || !add_dynamic_entry (DT_RELASZ, 0)
6545 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6546 return FALSE;
6547 }
6548
6549 /* If any dynamic relocs apply to a read-only section, then we
6550 need a DT_TEXTREL entry. */
6551 if ((info->flags & DF_TEXTREL) == 0)
6552 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6553 info);
6554
6555 if ((info->flags & DF_TEXTREL) != 0)
6556 {
6557 if (!add_dynamic_entry (DT_TEXTREL, 0))
6558 return FALSE;
6559 }
6560 if (htab->is_vxworks
6561 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6562 return FALSE;
6563 }
6564 #undef add_dynamic_entry
6565
6566 if (htab->glink_eh_frame != NULL
6567 && htab->glink_eh_frame->contents != NULL)
6568 {
6569 unsigned char *p = htab->glink_eh_frame->contents;
6570 bfd_vma val;
6571
6572 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6573 /* CIE length (rewrite in case little-endian). */
6574 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6575 p += sizeof (glink_eh_frame_cie);
6576 /* FDE length. */
6577 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6578 bfd_put_32 (htab->elf.dynobj, val, p);
6579 p += 4;
6580 /* CIE pointer. */
6581 val = p - htab->glink_eh_frame->contents;
6582 bfd_put_32 (htab->elf.dynobj, val, p);
6583 p += 4;
6584 /* Offset to .glink. Set later. */
6585 p += 4;
6586 /* .glink size. */
6587 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6588 p += 4;
6589 /* Augmentation. */
6590 p += 1;
6591
6592 if (info->shared
6593 && htab->elf.dynamic_sections_created)
6594 {
6595 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6596 if (adv < 64)
6597 *p++ = DW_CFA_advance_loc + adv;
6598 else if (adv < 256)
6599 {
6600 *p++ = DW_CFA_advance_loc1;
6601 *p++ = adv;
6602 }
6603 else if (adv < 65536)
6604 {
6605 *p++ = DW_CFA_advance_loc2;
6606 bfd_put_16 (htab->elf.dynobj, adv, p);
6607 p += 2;
6608 }
6609 else
6610 {
6611 *p++ = DW_CFA_advance_loc4;
6612 bfd_put_32 (htab->elf.dynobj, adv, p);
6613 p += 4;
6614 }
6615 *p++ = DW_CFA_register;
6616 *p++ = 65;
6617 p++;
6618 *p++ = DW_CFA_advance_loc + 4;
6619 *p++ = DW_CFA_restore_extended;
6620 *p++ = 65;
6621 }
6622 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6623 == htab->glink_eh_frame->size);
6624 }
6625
6626 return TRUE;
6627 }
6628
6629 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6630 if it looks like nothing is using them. */
6631
6632 static void
6633 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6634 {
6635 struct elf_link_hash_entry *sda = lsect->sym;
6636
6637 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6638 {
6639 asection *s;
6640
6641 s = bfd_get_section_by_name (output_bfd, lsect->name);
6642 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6643 {
6644 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6645 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6646 {
6647 sda->def_regular = 0;
6648 /* This is somewhat magic. See elf_link_output_extsym. */
6649 sda->ref_dynamic = 1;
6650 sda->forced_local = 0;
6651 }
6652 }
6653 }
6654 }
6655
6656 void
6657 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6658 {
6659 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6660
6661 if (htab != NULL)
6662 {
6663 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6664 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6665 }
6666 }
6667
6668
6669 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6670
6671 static bfd_boolean
6672 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6673 {
6674 if (h->plt.plist != NULL
6675 && !h->def_regular
6676 && (!h->pointer_equality_needed
6677 || !h->ref_regular_nonweak))
6678 return FALSE;
6679
6680 return _bfd_elf_hash_symbol (h);
6681 }
6682 \f
6683 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6684
6685 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6686 used for some functions that are allowed to break the ABI). */
6687 static const int shared_stub_entry[] =
6688 {
6689 0x7c0802a6, /* mflr 0 */
6690 0x429f0005, /* bcl 20, 31, .Lxxx */
6691 0x7d8802a6, /* mflr 12 */
6692 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6693 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6694 0x7c0803a6, /* mtlr 0 */
6695 0x7d8903a6, /* mtctr 12 */
6696 0x4e800420, /* bctr */
6697 };
6698
6699 static const int stub_entry[] =
6700 {
6701 0x3d800000, /* lis 12,xxx@ha */
6702 0x398c0000, /* addi 12,12,xxx@l */
6703 0x7d8903a6, /* mtctr 12 */
6704 0x4e800420, /* bctr */
6705 };
6706
6707 struct ppc_elf_relax_info
6708 {
6709 unsigned int workaround_size;
6710 };
6711
6712 /* This function implements long branch trampolines, and the ppc476
6713 icache bug workaround. Any section needing trampolines or patch
6714 space for the workaround has its size extended so that we can
6715 add trampolines at the end of the section. */
6716
6717 static bfd_boolean
6718 ppc_elf_relax_section (bfd *abfd,
6719 asection *isec,
6720 struct bfd_link_info *link_info,
6721 bfd_boolean *again)
6722 {
6723 struct one_fixup
6724 {
6725 struct one_fixup *next;
6726 asection *tsec;
6727 /* Final link, can use the symbol offset. For a
6728 relocatable link we use the symbol's index. */
6729 bfd_vma toff;
6730 bfd_vma trampoff;
6731 };
6732
6733 Elf_Internal_Shdr *symtab_hdr;
6734 bfd_byte *contents = NULL;
6735 Elf_Internal_Sym *isymbuf = NULL;
6736 Elf_Internal_Rela *internal_relocs = NULL;
6737 Elf_Internal_Rela *irel, *irelend = NULL;
6738 struct one_fixup *fixups = NULL;
6739 struct ppc_elf_relax_info *relax_info = NULL;
6740 unsigned changes = 0;
6741 bfd_boolean workaround_change;
6742 struct ppc_elf_link_hash_table *htab;
6743 bfd_size_type trampbase, trampoff, newsize;
6744 asection *got2;
6745 bfd_boolean maybe_pasted;
6746
6747 *again = FALSE;
6748
6749 /* No need to do anything with non-alloc or non-code sections. */
6750 if ((isec->flags & SEC_ALLOC) == 0
6751 || (isec->flags & SEC_CODE) == 0
6752 || (isec->flags & SEC_LINKER_CREATED) != 0
6753 || isec->size < 4)
6754 return TRUE;
6755
6756 /* We cannot represent the required PIC relocs in the output, so don't
6757 do anything. The linker doesn't support mixing -shared and -r
6758 anyway. */
6759 if (link_info->relocatable && link_info->shared)
6760 return TRUE;
6761
6762 htab = ppc_elf_hash_table (link_info);
6763 if (htab == NULL)
6764 return TRUE;
6765
6766 isec->size = (isec->size + 3) & -4;
6767 if (isec->rawsize == 0)
6768 isec->rawsize = isec->size;
6769 trampbase = isec->size;
6770
6771 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6772 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6773 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6774
6775 if (htab->params->ppc476_workaround)
6776 {
6777 if (elf_section_data (isec)->sec_info == NULL)
6778 {
6779 elf_section_data (isec)->sec_info
6780 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6781 if (elf_section_data (isec)->sec_info == NULL)
6782 return FALSE;
6783 }
6784 relax_info = elf_section_data (isec)->sec_info;
6785 trampbase -= relax_info->workaround_size;
6786 }
6787
6788 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6789 || strcmp (isec->output_section->name, ".fini") == 0);
6790 /* Space for a branch around any trampolines. */
6791 trampoff = trampbase;
6792 if (maybe_pasted && trampbase == isec->rawsize)
6793 trampoff += 4;
6794
6795 symtab_hdr = &elf_symtab_hdr (abfd);
6796
6797 if (htab->params->branch_trampolines)
6798 {
6799 /* Get a copy of the native relocations. */
6800 if (isec->reloc_count != 0)
6801 {
6802 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6803 link_info->keep_memory);
6804 if (internal_relocs == NULL)
6805 goto error_return;
6806 }
6807
6808 got2 = bfd_get_section_by_name (abfd, ".got2");
6809
6810 irelend = internal_relocs + isec->reloc_count;
6811 for (irel = internal_relocs; irel < irelend; irel++)
6812 {
6813 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6814 bfd_vma toff, roff;
6815 asection *tsec;
6816 struct one_fixup *f;
6817 size_t insn_offset = 0;
6818 bfd_vma max_branch_offset, val;
6819 bfd_byte *hit_addr;
6820 unsigned long t0;
6821 struct elf_link_hash_entry *h;
6822 struct plt_entry **plist;
6823 unsigned char sym_type;
6824
6825 switch (r_type)
6826 {
6827 case R_PPC_REL24:
6828 case R_PPC_LOCAL24PC:
6829 case R_PPC_PLTREL24:
6830 max_branch_offset = 1 << 25;
6831 break;
6832
6833 case R_PPC_REL14:
6834 case R_PPC_REL14_BRTAKEN:
6835 case R_PPC_REL14_BRNTAKEN:
6836 max_branch_offset = 1 << 15;
6837 break;
6838
6839 default:
6840 continue;
6841 }
6842
6843 /* Get the value of the symbol referred to by the reloc. */
6844 h = NULL;
6845 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6846 {
6847 /* A local symbol. */
6848 Elf_Internal_Sym *isym;
6849
6850 /* Read this BFD's local symbols. */
6851 if (isymbuf == NULL)
6852 {
6853 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6854 if (isymbuf == NULL)
6855 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6856 symtab_hdr->sh_info, 0,
6857 NULL, NULL, NULL);
6858 if (isymbuf == 0)
6859 goto error_return;
6860 }
6861 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6862 if (isym->st_shndx == SHN_UNDEF)
6863 tsec = bfd_und_section_ptr;
6864 else if (isym->st_shndx == SHN_ABS)
6865 tsec = bfd_abs_section_ptr;
6866 else if (isym->st_shndx == SHN_COMMON)
6867 tsec = bfd_com_section_ptr;
6868 else
6869 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6870
6871 toff = isym->st_value;
6872 sym_type = ELF_ST_TYPE (isym->st_info);
6873 }
6874 else
6875 {
6876 /* Global symbol handling. */
6877 unsigned long indx;
6878
6879 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6880 h = elf_sym_hashes (abfd)[indx];
6881
6882 while (h->root.type == bfd_link_hash_indirect
6883 || h->root.type == bfd_link_hash_warning)
6884 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6885
6886 if (h->root.type == bfd_link_hash_defined
6887 || h->root.type == bfd_link_hash_defweak)
6888 {
6889 tsec = h->root.u.def.section;
6890 toff = h->root.u.def.value;
6891 }
6892 else if (h->root.type == bfd_link_hash_undefined
6893 || h->root.type == bfd_link_hash_undefweak)
6894 {
6895 tsec = bfd_und_section_ptr;
6896 toff = link_info->relocatable ? indx : 0;
6897 }
6898 else
6899 continue;
6900
6901 /* If this branch is to __tls_get_addr then we may later
6902 optimise away the call. We won't be needing a long-
6903 branch stub in that case. */
6904 if (link_info->executable
6905 && !link_info->relocatable
6906 && h == htab->tls_get_addr
6907 && irel != internal_relocs)
6908 {
6909 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
6910 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
6911 unsigned int tls_mask = 0;
6912
6913 /* The previous reloc should be one of R_PPC_TLSGD or
6914 R_PPC_TLSLD, or for older object files, a reloc
6915 on the __tls_get_addr arg setup insn. Get tls
6916 mask bits from the symbol on that reloc. */
6917 if (t_symndx < symtab_hdr->sh_info)
6918 {
6919 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6920
6921 if (local_got_offsets != NULL)
6922 {
6923 struct plt_entry **local_plt = (struct plt_entry **)
6924 (local_got_offsets + symtab_hdr->sh_info);
6925 char *lgot_masks = (char *)
6926 (local_plt + symtab_hdr->sh_info);
6927 tls_mask = lgot_masks[t_symndx];
6928 }
6929 }
6930 else
6931 {
6932 struct elf_link_hash_entry *th
6933 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
6934
6935 while (th->root.type == bfd_link_hash_indirect
6936 || th->root.type == bfd_link_hash_warning)
6937 th = (struct elf_link_hash_entry *) th->root.u.i.link;
6938
6939 tls_mask
6940 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
6941 }
6942
6943 /* The mask bits tell us if the call will be
6944 optimised away. */
6945 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
6946 && (t_rtype == R_PPC_TLSGD
6947 || t_rtype == R_PPC_GOT_TLSGD16
6948 || t_rtype == R_PPC_GOT_TLSGD16_LO))
6949 continue;
6950 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
6951 && (t_rtype == R_PPC_TLSLD
6952 || t_rtype == R_PPC_GOT_TLSLD16
6953 || t_rtype == R_PPC_GOT_TLSLD16_LO))
6954 continue;
6955 }
6956
6957 sym_type = h->type;
6958 }
6959
6960 /* The condition here under which we call find_plt_ent must
6961 match that in relocate_section. If we call find_plt_ent here
6962 but not in relocate_section, or vice versa, then the branch
6963 destination used here may be incorrect. */
6964 plist = NULL;
6965 if (h != NULL)
6966 {
6967 /* We know is_branch_reloc (r_type) is true. */
6968 if (h->type == STT_GNU_IFUNC
6969 || r_type == R_PPC_PLTREL24)
6970 plist = &h->plt.plist;
6971 }
6972 else if (sym_type == STT_GNU_IFUNC
6973 && elf_local_got_offsets (abfd) != NULL)
6974 {
6975 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6976 struct plt_entry **local_plt = (struct plt_entry **)
6977 (local_got_offsets + symtab_hdr->sh_info);
6978 plist = local_plt + ELF32_R_SYM (irel->r_info);
6979 }
6980 if (plist != NULL)
6981 {
6982 bfd_vma addend = 0;
6983 struct plt_entry *ent;
6984
6985 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6986 addend = irel->r_addend;
6987 ent = find_plt_ent (plist, got2, addend);
6988 if (ent != NULL)
6989 {
6990 if (htab->plt_type == PLT_NEW
6991 || h == NULL
6992 || !htab->elf.dynamic_sections_created
6993 || h->dynindx == -1)
6994 {
6995 tsec = htab->glink;
6996 toff = ent->glink_offset;
6997 }
6998 else
6999 {
7000 tsec = htab->plt;
7001 toff = ent->plt.offset;
7002 }
7003 }
7004 }
7005
7006 /* If the branch and target are in the same section, you have
7007 no hope of adding stubs. We'll error out later should the
7008 branch overflow. */
7009 if (tsec == isec)
7010 continue;
7011
7012 /* There probably isn't any reason to handle symbols in
7013 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7014 attribute for a code section, and we are only looking at
7015 branches. However, implement it correctly here as a
7016 reference for other target relax_section functions. */
7017 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7018 {
7019 /* At this stage in linking, no SEC_MERGE symbol has been
7020 adjusted, so all references to such symbols need to be
7021 passed through _bfd_merged_section_offset. (Later, in
7022 relocate_section, all SEC_MERGE symbols *except* for
7023 section symbols have been adjusted.)
7024
7025 gas may reduce relocations against symbols in SEC_MERGE
7026 sections to a relocation against the section symbol when
7027 the original addend was zero. When the reloc is against
7028 a section symbol we should include the addend in the
7029 offset passed to _bfd_merged_section_offset, since the
7030 location of interest is the original symbol. On the
7031 other hand, an access to "sym+addend" where "sym" is not
7032 a section symbol should not include the addend; Such an
7033 access is presumed to be an offset from "sym"; The
7034 location of interest is just "sym". */
7035 if (sym_type == STT_SECTION)
7036 toff += irel->r_addend;
7037
7038 toff
7039 = _bfd_merged_section_offset (abfd, &tsec,
7040 elf_section_data (tsec)->sec_info,
7041 toff);
7042
7043 if (sym_type != STT_SECTION)
7044 toff += irel->r_addend;
7045 }
7046 /* PLTREL24 addends are special. */
7047 else if (r_type != R_PPC_PLTREL24)
7048 toff += irel->r_addend;
7049
7050 /* Attempted -shared link of non-pic code loses. */
7051 if ((!link_info->relocatable
7052 && tsec == bfd_und_section_ptr)
7053 || tsec->output_section == NULL
7054 || (tsec->owner != NULL
7055 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7056 continue;
7057
7058 roff = irel->r_offset;
7059
7060 /* If the branch is in range, no need to do anything. */
7061 if (tsec != bfd_und_section_ptr
7062 && (!link_info->relocatable
7063 /* A relocatable link may have sections moved during
7064 final link, so do not presume they remain in range. */
7065 || tsec->output_section == isec->output_section))
7066 {
7067 bfd_vma symaddr, reladdr;
7068
7069 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7070 reladdr = isec->output_section->vma + isec->output_offset + roff;
7071 if (symaddr - reladdr + max_branch_offset
7072 < 2 * max_branch_offset)
7073 continue;
7074 }
7075
7076 /* Look for an existing fixup to this address. */
7077 for (f = fixups; f ; f = f->next)
7078 if (f->tsec == tsec && f->toff == toff)
7079 break;
7080
7081 if (f == NULL)
7082 {
7083 size_t size;
7084 unsigned long stub_rtype;
7085
7086 val = trampoff - roff;
7087 if (val >= max_branch_offset)
7088 /* Oh dear, we can't reach a trampoline. Don't try to add
7089 one. We'll report an error later. */
7090 continue;
7091
7092 if (link_info->shared)
7093 {
7094 size = 4 * ARRAY_SIZE (shared_stub_entry);
7095 insn_offset = 12;
7096 }
7097 else
7098 {
7099 size = 4 * ARRAY_SIZE (stub_entry);
7100 insn_offset = 0;
7101 }
7102 stub_rtype = R_PPC_RELAX;
7103 if (tsec == htab->plt
7104 || tsec == htab->glink)
7105 {
7106 stub_rtype = R_PPC_RELAX_PLT;
7107 if (r_type == R_PPC_PLTREL24)
7108 stub_rtype = R_PPC_RELAX_PLTREL24;
7109 }
7110
7111 /* Hijack the old relocation. Since we need two
7112 relocations for this use a "composite" reloc. */
7113 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7114 stub_rtype);
7115 irel->r_offset = trampoff + insn_offset;
7116 if (r_type == R_PPC_PLTREL24
7117 && stub_rtype != R_PPC_RELAX_PLTREL24)
7118 irel->r_addend = 0;
7119
7120 /* Record the fixup so we don't do it again this section. */
7121 f = bfd_malloc (sizeof (*f));
7122 f->next = fixups;
7123 f->tsec = tsec;
7124 f->toff = toff;
7125 f->trampoff = trampoff;
7126 fixups = f;
7127
7128 trampoff += size;
7129 changes++;
7130 }
7131 else
7132 {
7133 val = f->trampoff - roff;
7134 if (val >= max_branch_offset)
7135 continue;
7136
7137 /* Nop out the reloc, since we're finalizing things here. */
7138 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7139 }
7140
7141 /* Get the section contents. */
7142 if (contents == NULL)
7143 {
7144 /* Get cached copy if it exists. */
7145 if (elf_section_data (isec)->this_hdr.contents != NULL)
7146 contents = elf_section_data (isec)->this_hdr.contents;
7147 /* Go get them off disk. */
7148 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7149 goto error_return;
7150 }
7151
7152 /* Fix up the existing branch to hit the trampoline. */
7153 hit_addr = contents + roff;
7154 switch (r_type)
7155 {
7156 case R_PPC_REL24:
7157 case R_PPC_LOCAL24PC:
7158 case R_PPC_PLTREL24:
7159 t0 = bfd_get_32 (abfd, hit_addr);
7160 t0 &= ~0x3fffffc;
7161 t0 |= val & 0x3fffffc;
7162 bfd_put_32 (abfd, t0, hit_addr);
7163 break;
7164
7165 case R_PPC_REL14:
7166 case R_PPC_REL14_BRTAKEN:
7167 case R_PPC_REL14_BRNTAKEN:
7168 t0 = bfd_get_32 (abfd, hit_addr);
7169 t0 &= ~0xfffc;
7170 t0 |= val & 0xfffc;
7171 bfd_put_32 (abfd, t0, hit_addr);
7172 break;
7173 }
7174 }
7175
7176 while (fixups != NULL)
7177 {
7178 struct one_fixup *f = fixups;
7179 fixups = fixups->next;
7180 free (f);
7181 }
7182 }
7183
7184 workaround_change = FALSE;
7185 newsize = trampoff;
7186 if (htab->params->ppc476_workaround
7187 && (!link_info->relocatable
7188 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7189 {
7190 bfd_vma addr, end_addr;
7191 unsigned int crossings;
7192 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7193
7194 addr = isec->output_section->vma + isec->output_offset;
7195 end_addr = addr + trampoff;
7196 addr &= -pagesize;
7197 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7198 if (crossings != 0)
7199 {
7200 /* Keep space aligned, to ensure the patch code itself does
7201 not cross a page. Don't decrease size calculated on a
7202 previous pass as otherwise we might never settle on a layout. */
7203 newsize = 15 - ((end_addr - 1) & 15);
7204 newsize += crossings * 16;
7205 if (relax_info->workaround_size < newsize)
7206 {
7207 relax_info->workaround_size = newsize;
7208 workaround_change = TRUE;
7209 }
7210 /* Ensure relocate_section is called. */
7211 isec->flags |= SEC_RELOC;
7212 }
7213 newsize = trampoff + relax_info->workaround_size;
7214 }
7215
7216 if (changes || workaround_change)
7217 isec->size = newsize;
7218
7219 if (isymbuf != NULL
7220 && symtab_hdr->contents != (unsigned char *) isymbuf)
7221 {
7222 if (! link_info->keep_memory)
7223 free (isymbuf);
7224 else
7225 {
7226 /* Cache the symbols for elf_link_input_bfd. */
7227 symtab_hdr->contents = (unsigned char *) isymbuf;
7228 }
7229 }
7230
7231 if (contents != NULL
7232 && elf_section_data (isec)->this_hdr.contents != contents)
7233 {
7234 if (!changes && !link_info->keep_memory)
7235 free (contents);
7236 else
7237 {
7238 /* Cache the section contents for elf_link_input_bfd. */
7239 elf_section_data (isec)->this_hdr.contents = contents;
7240 }
7241 }
7242
7243 if (changes != 0)
7244 {
7245 /* Append sufficient NOP relocs so we can write out relocation
7246 information for the trampolines. */
7247 Elf_Internal_Shdr *rel_hdr;
7248 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7249 * sizeof (*new_relocs));
7250 unsigned ix;
7251
7252 if (!new_relocs)
7253 goto error_return;
7254 memcpy (new_relocs, internal_relocs,
7255 isec->reloc_count * sizeof (*new_relocs));
7256 for (ix = changes; ix--;)
7257 {
7258 irel = new_relocs + ix + isec->reloc_count;
7259
7260 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7261 }
7262 if (internal_relocs != elf_section_data (isec)->relocs)
7263 free (internal_relocs);
7264 elf_section_data (isec)->relocs = new_relocs;
7265 isec->reloc_count += changes;
7266 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7267 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7268 }
7269 else if (internal_relocs != NULL
7270 && elf_section_data (isec)->relocs != internal_relocs)
7271 free (internal_relocs);
7272
7273 *again = changes != 0 || workaround_change;
7274 return TRUE;
7275
7276 error_return:
7277 while (fixups != NULL)
7278 {
7279 struct one_fixup *f = fixups;
7280 fixups = fixups->next;
7281 free (f);
7282 }
7283 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7284 free (isymbuf);
7285 if (contents != NULL
7286 && elf_section_data (isec)->this_hdr.contents != contents)
7287 free (contents);
7288 if (internal_relocs != NULL
7289 && elf_section_data (isec)->relocs != internal_relocs)
7290 free (internal_relocs);
7291 return FALSE;
7292 }
7293 \f
7294 /* What to do when ld finds relocations against symbols defined in
7295 discarded sections. */
7296
7297 static unsigned int
7298 ppc_elf_action_discarded (asection *sec)
7299 {
7300 if (strcmp (".fixup", sec->name) == 0)
7301 return 0;
7302
7303 if (strcmp (".got2", sec->name) == 0)
7304 return 0;
7305
7306 return _bfd_elf_default_action_discarded (sec);
7307 }
7308 \f
7309 /* Fill in the address for a pointer generated in a linker section. */
7310
7311 static bfd_vma
7312 elf_finish_pointer_linker_section (bfd *input_bfd,
7313 elf_linker_section_t *lsect,
7314 struct elf_link_hash_entry *h,
7315 bfd_vma relocation,
7316 const Elf_Internal_Rela *rel)
7317 {
7318 elf_linker_section_pointers_t *linker_section_ptr;
7319
7320 BFD_ASSERT (lsect != NULL);
7321
7322 if (h != NULL)
7323 {
7324 /* Handle global symbol. */
7325 struct ppc_elf_link_hash_entry *eh;
7326
7327 eh = (struct ppc_elf_link_hash_entry *) h;
7328 BFD_ASSERT (eh->elf.def_regular);
7329 linker_section_ptr = eh->linker_section_pointer;
7330 }
7331 else
7332 {
7333 /* Handle local symbol. */
7334 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7335
7336 BFD_ASSERT (is_ppc_elf (input_bfd));
7337 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7338 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7339 }
7340
7341 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7342 rel->r_addend,
7343 lsect);
7344 BFD_ASSERT (linker_section_ptr != NULL);
7345
7346 /* Offset will always be a multiple of four, so use the bottom bit
7347 as a "written" flag. */
7348 if ((linker_section_ptr->offset & 1) == 0)
7349 {
7350 bfd_put_32 (lsect->section->owner,
7351 relocation + linker_section_ptr->addend,
7352 lsect->section->contents + linker_section_ptr->offset);
7353 linker_section_ptr->offset += 1;
7354 }
7355
7356 relocation = (lsect->section->output_section->vma
7357 + lsect->section->output_offset
7358 + linker_section_ptr->offset - 1
7359 - SYM_VAL (lsect->sym));
7360
7361 #ifdef DEBUG
7362 fprintf (stderr,
7363 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7364 lsect->name, (long) relocation, (long) relocation);
7365 #endif
7366
7367 return relocation;
7368 }
7369
7370 #define PPC_LO(v) ((v) & 0xffff)
7371 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7372 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7373
7374 static void
7375 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7376 struct bfd_link_info *info)
7377 {
7378 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7379 bfd *output_bfd = info->output_bfd;
7380 bfd_vma plt;
7381
7382 plt = ((ent->plt.offset & ~1)
7383 + plt_sec->output_section->vma
7384 + plt_sec->output_offset);
7385
7386 if (info->shared)
7387 {
7388 bfd_vma got = 0;
7389
7390 if (ent->addend >= 32768)
7391 got = (ent->addend
7392 + ent->sec->output_section->vma
7393 + ent->sec->output_offset);
7394 else if (htab->elf.hgot != NULL)
7395 got = SYM_VAL (htab->elf.hgot);
7396
7397 plt -= got;
7398
7399 if (plt + 0x8000 < 0x10000)
7400 {
7401 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7402 p += 4;
7403 bfd_put_32 (output_bfd, MTCTR_11, p);
7404 p += 4;
7405 bfd_put_32 (output_bfd, BCTR, p);
7406 p += 4;
7407 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7408 p += 4;
7409 }
7410 else
7411 {
7412 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7413 p += 4;
7414 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7415 p += 4;
7416 bfd_put_32 (output_bfd, MTCTR_11, p);
7417 p += 4;
7418 bfd_put_32 (output_bfd, BCTR, p);
7419 p += 4;
7420 }
7421 }
7422 else
7423 {
7424 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7425 p += 4;
7426 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7427 p += 4;
7428 bfd_put_32 (output_bfd, MTCTR_11, p);
7429 p += 4;
7430 bfd_put_32 (output_bfd, BCTR, p);
7431 p += 4;
7432 }
7433 }
7434
7435 /* Return true if symbol is defined statically. */
7436
7437 static bfd_boolean
7438 is_static_defined (struct elf_link_hash_entry *h)
7439 {
7440 return ((h->root.type == bfd_link_hash_defined
7441 || h->root.type == bfd_link_hash_defweak)
7442 && h->root.u.def.section != NULL
7443 && h->root.u.def.section->output_section != NULL);
7444 }
7445
7446 /* If INSN is an opcode that may be used with an @tls operand, return
7447 the transformed insn for TLS optimisation, otherwise return 0. If
7448 REG is non-zero only match an insn with RB or RA equal to REG. */
7449
7450 unsigned int
7451 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7452 {
7453 unsigned int rtra;
7454
7455 if ((insn & (0x3f << 26)) != 31 << 26)
7456 return 0;
7457
7458 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7459 rtra = insn & ((1 << 26) - (1 << 16));
7460 else if (((insn >> 16) & 0x1f) == reg)
7461 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7462 else
7463 return 0;
7464
7465 if ((insn & (0x3ff << 1)) == 266 << 1)
7466 /* add -> addi. */
7467 insn = 14 << 26;
7468 else if ((insn & (0x1f << 1)) == 23 << 1
7469 && ((insn & (0x1f << 6)) < 14 << 6
7470 || ((insn & (0x1f << 6)) >= 16 << 6
7471 && (insn & (0x1f << 6)) < 24 << 6)))
7472 /* load and store indexed -> dform. */
7473 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7474 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7475 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7476 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7477 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7478 /* lwax -> lwa. */
7479 insn = (58 << 26) | 2;
7480 else
7481 return 0;
7482 insn |= rtra;
7483 return insn;
7484 }
7485
7486 /* If INSN is an opcode that may be used with an @tprel operand, return
7487 the transformed insn for an undefined weak symbol, ie. with the
7488 thread pointer REG operand removed. Otherwise return 0. */
7489
7490 unsigned int
7491 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7492 {
7493 if ((insn & (0x1f << 16)) == reg << 16
7494 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7495 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7496 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7497 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7498 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7499 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7500 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7501 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7502 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7503 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7504 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7505 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7506 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7507 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7508 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7509 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7510 && (insn & 3) != 1)
7511 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7512 && ((insn & 3) == 0 || (insn & 3) == 3))))
7513 {
7514 insn &= ~(0x1f << 16);
7515 }
7516 else if ((insn & (0x1f << 21)) == reg << 21
7517 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7518 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7519 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7520 {
7521 insn &= ~(0x1f << 21);
7522 insn |= (insn & (0x1f << 16)) << 5;
7523 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7524 insn -= 2 >> 26; /* convert to ori,oris */
7525 }
7526 else
7527 insn = 0;
7528 return insn;
7529 }
7530
7531 static bfd_boolean
7532 is_insn_ds_form (unsigned int insn)
7533 {
7534 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7535 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7536 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7537 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7538 }
7539
7540 static bfd_boolean
7541 is_insn_dq_form (unsigned int insn)
7542 {
7543 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7544 }
7545
7546 /* The RELOCATE_SECTION function is called by the ELF backend linker
7547 to handle the relocations for a section.
7548
7549 The relocs are always passed as Rela structures; if the section
7550 actually uses Rel structures, the r_addend field will always be
7551 zero.
7552
7553 This function is responsible for adjust the section contents as
7554 necessary, and (if using Rela relocs and generating a
7555 relocatable output file) adjusting the reloc addend as
7556 necessary.
7557
7558 This function does not have to worry about setting the reloc
7559 address or the reloc symbol index.
7560
7561 LOCAL_SYMS is a pointer to the swapped in local symbols.
7562
7563 LOCAL_SECTIONS is an array giving the section in the input file
7564 corresponding to the st_shndx field of each local symbol.
7565
7566 The global hash table entry for the global symbols can be found
7567 via elf_sym_hashes (input_bfd).
7568
7569 When generating relocatable output, this function must handle
7570 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7571 going to be the section symbol corresponding to the output
7572 section, which means that the addend must be adjusted
7573 accordingly. */
7574
7575 static bfd_boolean
7576 ppc_elf_relocate_section (bfd *output_bfd,
7577 struct bfd_link_info *info,
7578 bfd *input_bfd,
7579 asection *input_section,
7580 bfd_byte *contents,
7581 Elf_Internal_Rela *relocs,
7582 Elf_Internal_Sym *local_syms,
7583 asection **local_sections)
7584 {
7585 Elf_Internal_Shdr *symtab_hdr;
7586 struct elf_link_hash_entry **sym_hashes;
7587 struct ppc_elf_link_hash_table *htab;
7588 Elf_Internal_Rela *rel;
7589 Elf_Internal_Rela *relend;
7590 Elf_Internal_Rela outrel;
7591 asection *got2;
7592 bfd_vma *local_got_offsets;
7593 bfd_boolean ret = TRUE;
7594 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7595 bfd_boolean is_vxworks_tls;
7596
7597 #ifdef DEBUG
7598 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7599 "%ld relocations%s",
7600 input_bfd, input_section,
7601 (long) input_section->reloc_count,
7602 (info->relocatable) ? " (relocatable)" : "");
7603 #endif
7604
7605 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7606
7607 /* Initialize howto table if not already done. */
7608 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7609 ppc_elf_howto_init ();
7610
7611 htab = ppc_elf_hash_table (info);
7612 local_got_offsets = elf_local_got_offsets (input_bfd);
7613 symtab_hdr = &elf_symtab_hdr (input_bfd);
7614 sym_hashes = elf_sym_hashes (input_bfd);
7615 /* We have to handle relocations in vxworks .tls_vars sections
7616 specially, because the dynamic loader is 'weird'. */
7617 is_vxworks_tls = (htab->is_vxworks && info->shared
7618 && !strcmp (input_section->output_section->name,
7619 ".tls_vars"));
7620 rel = relocs;
7621 relend = relocs + input_section->reloc_count;
7622 for (; rel < relend; rel++)
7623 {
7624 enum elf_ppc_reloc_type r_type;
7625 bfd_vma addend;
7626 bfd_reloc_status_type r;
7627 Elf_Internal_Sym *sym;
7628 asection *sec;
7629 struct elf_link_hash_entry *h;
7630 const char *sym_name;
7631 reloc_howto_type *howto;
7632 unsigned long r_symndx;
7633 bfd_vma relocation;
7634 bfd_vma branch_bit, from;
7635 bfd_boolean unresolved_reloc;
7636 bfd_boolean warned;
7637 unsigned int tls_type, tls_mask, tls_gd;
7638 struct plt_entry **ifunc;
7639 struct reloc_howto_struct alt_howto;
7640
7641 r_type = ELF32_R_TYPE (rel->r_info);
7642 sym = NULL;
7643 sec = NULL;
7644 h = NULL;
7645 unresolved_reloc = FALSE;
7646 warned = FALSE;
7647 r_symndx = ELF32_R_SYM (rel->r_info);
7648
7649 if (r_symndx < symtab_hdr->sh_info)
7650 {
7651 sym = local_syms + r_symndx;
7652 sec = local_sections[r_symndx];
7653 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7654
7655 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7656 }
7657 else
7658 {
7659 bfd_boolean ignored;
7660
7661 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7662 r_symndx, symtab_hdr, sym_hashes,
7663 h, sec, relocation,
7664 unresolved_reloc, warned, ignored);
7665
7666 sym_name = h->root.root.string;
7667 }
7668
7669 if (sec != NULL && discarded_section (sec))
7670 {
7671 /* For relocs against symbols from removed linkonce sections,
7672 or sections discarded by a linker script, we just want the
7673 section contents zeroed. Avoid any special processing. */
7674 howto = NULL;
7675 if (r_type < R_PPC_max)
7676 howto = ppc_elf_howto_table[r_type];
7677 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7678 rel, 1, relend, howto, 0, contents);
7679 }
7680
7681 if (info->relocatable)
7682 {
7683 if (got2 != NULL
7684 && r_type == R_PPC_PLTREL24
7685 && rel->r_addend != 0)
7686 {
7687 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7688 addend specifies the GOT pointer offset within .got2. */
7689 rel->r_addend += got2->output_offset;
7690 }
7691 if (r_type != R_PPC_RELAX_PLT
7692 && r_type != R_PPC_RELAX_PLTREL24
7693 && r_type != R_PPC_RELAX)
7694 continue;
7695 }
7696
7697 /* TLS optimizations. Replace instruction sequences and relocs
7698 based on information we collected in tls_optimize. We edit
7699 RELOCS so that --emit-relocs will output something sensible
7700 for the final instruction stream. */
7701 tls_mask = 0;
7702 tls_gd = 0;
7703 if (h != NULL)
7704 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7705 else if (local_got_offsets != NULL)
7706 {
7707 struct plt_entry **local_plt;
7708 char *lgot_masks;
7709 local_plt
7710 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7711 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7712 tls_mask = lgot_masks[r_symndx];
7713 }
7714
7715 /* Ensure reloc mapping code below stays sane. */
7716 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7717 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7718 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7719 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7720 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7721 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7722 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7723 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7724 abort ();
7725 switch (r_type)
7726 {
7727 default:
7728 break;
7729
7730 case R_PPC_GOT_TPREL16:
7731 case R_PPC_GOT_TPREL16_LO:
7732 if ((tls_mask & TLS_TLS) != 0
7733 && (tls_mask & TLS_TPREL) == 0)
7734 {
7735 bfd_vma insn;
7736
7737 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7738 insn &= 31 << 21;
7739 insn |= 0x3c020000; /* addis 0,2,0 */
7740 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7741 r_type = R_PPC_TPREL16_HA;
7742 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7743 }
7744 break;
7745
7746 case R_PPC_TLS:
7747 if ((tls_mask & TLS_TLS) != 0
7748 && (tls_mask & TLS_TPREL) == 0)
7749 {
7750 bfd_vma insn;
7751
7752 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7753 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7754 if (insn == 0)
7755 abort ();
7756 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7757 r_type = R_PPC_TPREL16_LO;
7758 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7759
7760 /* Was PPC_TLS which sits on insn boundary, now
7761 PPC_TPREL16_LO which is at low-order half-word. */
7762 rel->r_offset += d_offset;
7763 }
7764 break;
7765
7766 case R_PPC_GOT_TLSGD16_HI:
7767 case R_PPC_GOT_TLSGD16_HA:
7768 tls_gd = TLS_TPRELGD;
7769 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7770 goto tls_gdld_hi;
7771 break;
7772
7773 case R_PPC_GOT_TLSLD16_HI:
7774 case R_PPC_GOT_TLSLD16_HA:
7775 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7776 {
7777 tls_gdld_hi:
7778 if ((tls_mask & tls_gd) != 0)
7779 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7780 + R_PPC_GOT_TPREL16);
7781 else
7782 {
7783 rel->r_offset -= d_offset;
7784 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7785 r_type = R_PPC_NONE;
7786 }
7787 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7788 }
7789 break;
7790
7791 case R_PPC_GOT_TLSGD16:
7792 case R_PPC_GOT_TLSGD16_LO:
7793 tls_gd = TLS_TPRELGD;
7794 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7795 goto tls_ldgd_opt;
7796 break;
7797
7798 case R_PPC_GOT_TLSLD16:
7799 case R_PPC_GOT_TLSLD16_LO:
7800 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7801 {
7802 unsigned int insn1, insn2;
7803 bfd_vma offset;
7804
7805 tls_ldgd_opt:
7806 offset = (bfd_vma) -1;
7807 /* If not using the newer R_PPC_TLSGD/LD to mark
7808 __tls_get_addr calls, we must trust that the call
7809 stays with its arg setup insns, ie. that the next
7810 reloc is the __tls_get_addr call associated with
7811 the current reloc. Edit both insns. */
7812 if (input_section->has_tls_get_addr_call
7813 && rel + 1 < relend
7814 && branch_reloc_hash_match (input_bfd, rel + 1,
7815 htab->tls_get_addr))
7816 offset = rel[1].r_offset;
7817 /* We read the low GOT_TLS insn because we need to keep
7818 the destination reg. It may be something other than
7819 the usual r3, and moved to r3 before the call by
7820 intervening code. */
7821 insn1 = bfd_get_32 (output_bfd,
7822 contents + rel->r_offset - d_offset);
7823 if ((tls_mask & tls_gd) != 0)
7824 {
7825 /* IE */
7826 insn1 &= (0x1f << 21) | (0x1f << 16);
7827 insn1 |= 32 << 26; /* lwz */
7828 if (offset != (bfd_vma) -1)
7829 {
7830 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7831 insn2 = 0x7c631214; /* add 3,3,2 */
7832 bfd_put_32 (output_bfd, insn2, contents + offset);
7833 }
7834 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7835 + R_PPC_GOT_TPREL16);
7836 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7837 }
7838 else
7839 {
7840 /* LE */
7841 insn1 &= 0x1f << 21;
7842 insn1 |= 0x3c020000; /* addis r,2,0 */
7843 if (tls_gd == 0)
7844 {
7845 /* Was an LD reloc. */
7846 for (r_symndx = 0;
7847 r_symndx < symtab_hdr->sh_info;
7848 r_symndx++)
7849 if (local_sections[r_symndx] == sec)
7850 break;
7851 if (r_symndx >= symtab_hdr->sh_info)
7852 r_symndx = STN_UNDEF;
7853 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7854 if (r_symndx != STN_UNDEF)
7855 rel->r_addend -= (local_syms[r_symndx].st_value
7856 + sec->output_offset
7857 + sec->output_section->vma);
7858 }
7859 r_type = R_PPC_TPREL16_HA;
7860 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7861 if (offset != (bfd_vma) -1)
7862 {
7863 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7864 rel[1].r_offset = offset + d_offset;
7865 rel[1].r_addend = rel->r_addend;
7866 insn2 = 0x38630000; /* addi 3,3,0 */
7867 bfd_put_32 (output_bfd, insn2, contents + offset);
7868 }
7869 }
7870 bfd_put_32 (output_bfd, insn1,
7871 contents + rel->r_offset - d_offset);
7872 if (tls_gd == 0)
7873 {
7874 /* We changed the symbol on an LD reloc. Start over
7875 in order to get h, sym, sec etc. right. */
7876 rel--;
7877 continue;
7878 }
7879 }
7880 break;
7881
7882 case R_PPC_TLSGD:
7883 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7884 {
7885 unsigned int insn2;
7886 bfd_vma offset = rel->r_offset;
7887
7888 if ((tls_mask & TLS_TPRELGD) != 0)
7889 {
7890 /* IE */
7891 r_type = R_PPC_NONE;
7892 insn2 = 0x7c631214; /* add 3,3,2 */
7893 }
7894 else
7895 {
7896 /* LE */
7897 r_type = R_PPC_TPREL16_LO;
7898 rel->r_offset += d_offset;
7899 insn2 = 0x38630000; /* addi 3,3,0 */
7900 }
7901 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7902 bfd_put_32 (output_bfd, insn2, contents + offset);
7903 /* Zap the reloc on the _tls_get_addr call too. */
7904 BFD_ASSERT (offset == rel[1].r_offset);
7905 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7906 }
7907 break;
7908
7909 case R_PPC_TLSLD:
7910 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7911 {
7912 unsigned int insn2;
7913
7914 for (r_symndx = 0;
7915 r_symndx < symtab_hdr->sh_info;
7916 r_symndx++)
7917 if (local_sections[r_symndx] == sec)
7918 break;
7919 if (r_symndx >= symtab_hdr->sh_info)
7920 r_symndx = STN_UNDEF;
7921 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7922 if (r_symndx != STN_UNDEF)
7923 rel->r_addend -= (local_syms[r_symndx].st_value
7924 + sec->output_offset
7925 + sec->output_section->vma);
7926
7927 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7928 rel->r_offset += d_offset;
7929 insn2 = 0x38630000; /* addi 3,3,0 */
7930 bfd_put_32 (output_bfd, insn2,
7931 contents + rel->r_offset - d_offset);
7932 /* Zap the reloc on the _tls_get_addr call too. */
7933 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7934 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7935 rel--;
7936 continue;
7937 }
7938 break;
7939 }
7940
7941 /* Handle other relocations that tweak non-addend part of insn. */
7942 branch_bit = 0;
7943 switch (r_type)
7944 {
7945 default:
7946 break;
7947
7948 /* Branch taken prediction relocations. */
7949 case R_PPC_ADDR14_BRTAKEN:
7950 case R_PPC_REL14_BRTAKEN:
7951 branch_bit = BRANCH_PREDICT_BIT;
7952 /* Fall thru */
7953
7954 /* Branch not taken prediction relocations. */
7955 case R_PPC_ADDR14_BRNTAKEN:
7956 case R_PPC_REL14_BRNTAKEN:
7957 {
7958 bfd_vma insn;
7959
7960 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7961 insn &= ~BRANCH_PREDICT_BIT;
7962 insn |= branch_bit;
7963
7964 from = (rel->r_offset
7965 + input_section->output_offset
7966 + input_section->output_section->vma);
7967
7968 /* Invert 'y' bit if not the default. */
7969 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7970 insn ^= BRANCH_PREDICT_BIT;
7971
7972 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7973 break;
7974 }
7975 }
7976
7977 ifunc = NULL;
7978 if (!htab->is_vxworks)
7979 {
7980 struct plt_entry *ent;
7981
7982 if (h != NULL)
7983 {
7984 if (h->type == STT_GNU_IFUNC)
7985 ifunc = &h->plt.plist;
7986 }
7987 else if (local_got_offsets != NULL
7988 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7989 {
7990 struct plt_entry **local_plt;
7991
7992 local_plt = (struct plt_entry **) (local_got_offsets
7993 + symtab_hdr->sh_info);
7994 ifunc = local_plt + r_symndx;
7995 }
7996
7997 ent = NULL;
7998 if (ifunc != NULL
7999 && (!info->shared
8000 || is_branch_reloc (r_type)))
8001 {
8002 addend = 0;
8003 if (r_type == R_PPC_PLTREL24 && info->shared)
8004 addend = rel->r_addend;
8005 ent = find_plt_ent (ifunc, got2, addend);
8006 }
8007 if (ent != NULL)
8008 {
8009 if (h == NULL && (ent->plt.offset & 1) == 0)
8010 {
8011 Elf_Internal_Rela rela;
8012 bfd_byte *loc;
8013
8014 rela.r_offset = (htab->iplt->output_section->vma
8015 + htab->iplt->output_offset
8016 + ent->plt.offset);
8017 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8018 rela.r_addend = relocation;
8019 loc = htab->reliplt->contents;
8020 loc += (htab->reliplt->reloc_count++
8021 * sizeof (Elf32_External_Rela));
8022 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8023
8024 ent->plt.offset |= 1;
8025 }
8026 if (h == NULL && (ent->glink_offset & 1) == 0)
8027 {
8028 unsigned char *p = ((unsigned char *) htab->glink->contents
8029 + ent->glink_offset);
8030 write_glink_stub (ent, htab->iplt, p, info);
8031 ent->glink_offset |= 1;
8032 }
8033
8034 unresolved_reloc = FALSE;
8035 if (htab->plt_type == PLT_NEW
8036 || !htab->elf.dynamic_sections_created
8037 || h == NULL
8038 || h->dynindx == -1)
8039 relocation = (htab->glink->output_section->vma
8040 + htab->glink->output_offset
8041 + (ent->glink_offset & ~1));
8042 else
8043 relocation = (htab->plt->output_section->vma
8044 + htab->plt->output_offset
8045 + ent->plt.offset);
8046 }
8047 }
8048
8049 addend = rel->r_addend;
8050 tls_type = 0;
8051 howto = NULL;
8052 if (r_type < R_PPC_max)
8053 howto = ppc_elf_howto_table[r_type];
8054 switch (r_type)
8055 {
8056 default:
8057 info->callbacks->einfo
8058 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8059 input_bfd, (int) r_type, sym_name);
8060
8061 bfd_set_error (bfd_error_bad_value);
8062 ret = FALSE;
8063 continue;
8064
8065 case R_PPC_NONE:
8066 case R_PPC_TLS:
8067 case R_PPC_TLSGD:
8068 case R_PPC_TLSLD:
8069 case R_PPC_EMB_MRKREF:
8070 case R_PPC_GNU_VTINHERIT:
8071 case R_PPC_GNU_VTENTRY:
8072 continue;
8073
8074 /* GOT16 relocations. Like an ADDR16 using the symbol's
8075 address in the GOT as relocation value instead of the
8076 symbol's value itself. Also, create a GOT entry for the
8077 symbol and put the symbol value there. */
8078 case R_PPC_GOT_TLSGD16:
8079 case R_PPC_GOT_TLSGD16_LO:
8080 case R_PPC_GOT_TLSGD16_HI:
8081 case R_PPC_GOT_TLSGD16_HA:
8082 tls_type = TLS_TLS | TLS_GD;
8083 goto dogot;
8084
8085 case R_PPC_GOT_TLSLD16:
8086 case R_PPC_GOT_TLSLD16_LO:
8087 case R_PPC_GOT_TLSLD16_HI:
8088 case R_PPC_GOT_TLSLD16_HA:
8089 tls_type = TLS_TLS | TLS_LD;
8090 goto dogot;
8091
8092 case R_PPC_GOT_TPREL16:
8093 case R_PPC_GOT_TPREL16_LO:
8094 case R_PPC_GOT_TPREL16_HI:
8095 case R_PPC_GOT_TPREL16_HA:
8096 tls_type = TLS_TLS | TLS_TPREL;
8097 goto dogot;
8098
8099 case R_PPC_GOT_DTPREL16:
8100 case R_PPC_GOT_DTPREL16_LO:
8101 case R_PPC_GOT_DTPREL16_HI:
8102 case R_PPC_GOT_DTPREL16_HA:
8103 tls_type = TLS_TLS | TLS_DTPREL;
8104 goto dogot;
8105
8106 case R_PPC_GOT16:
8107 case R_PPC_GOT16_LO:
8108 case R_PPC_GOT16_HI:
8109 case R_PPC_GOT16_HA:
8110 tls_mask = 0;
8111 dogot:
8112 {
8113 /* Relocation is to the entry for this symbol in the global
8114 offset table. */
8115 bfd_vma off;
8116 bfd_vma *offp;
8117 unsigned long indx;
8118
8119 if (htab->got == NULL)
8120 abort ();
8121
8122 indx = 0;
8123 if (tls_type == (TLS_TLS | TLS_LD)
8124 && (h == NULL
8125 || !h->def_dynamic))
8126 offp = &htab->tlsld_got.offset;
8127 else if (h != NULL)
8128 {
8129 bfd_boolean dyn;
8130 dyn = htab->elf.dynamic_sections_created;
8131 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8132 || (info->shared
8133 && SYMBOL_REFERENCES_LOCAL (info, h)))
8134 /* This is actually a static link, or it is a
8135 -Bsymbolic link and the symbol is defined
8136 locally, or the symbol was forced to be local
8137 because of a version file. */
8138 ;
8139 else
8140 {
8141 BFD_ASSERT (h->dynindx != -1);
8142 indx = h->dynindx;
8143 unresolved_reloc = FALSE;
8144 }
8145 offp = &h->got.offset;
8146 }
8147 else
8148 {
8149 if (local_got_offsets == NULL)
8150 abort ();
8151 offp = &local_got_offsets[r_symndx];
8152 }
8153
8154 /* The offset must always be a multiple of 4. We use the
8155 least significant bit to record whether we have already
8156 processed this entry. */
8157 off = *offp;
8158 if ((off & 1) != 0)
8159 off &= ~1;
8160 else
8161 {
8162 unsigned int tls_m = (tls_mask
8163 & (TLS_LD | TLS_GD | TLS_DTPREL
8164 | TLS_TPREL | TLS_TPRELGD));
8165
8166 if (offp == &htab->tlsld_got.offset)
8167 tls_m = TLS_LD;
8168 else if (h == NULL
8169 || !h->def_dynamic)
8170 tls_m &= ~TLS_LD;
8171
8172 /* We might have multiple got entries for this sym.
8173 Initialize them all. */
8174 do
8175 {
8176 int tls_ty = 0;
8177
8178 if ((tls_m & TLS_LD) != 0)
8179 {
8180 tls_ty = TLS_TLS | TLS_LD;
8181 tls_m &= ~TLS_LD;
8182 }
8183 else if ((tls_m & TLS_GD) != 0)
8184 {
8185 tls_ty = TLS_TLS | TLS_GD;
8186 tls_m &= ~TLS_GD;
8187 }
8188 else if ((tls_m & TLS_DTPREL) != 0)
8189 {
8190 tls_ty = TLS_TLS | TLS_DTPREL;
8191 tls_m &= ~TLS_DTPREL;
8192 }
8193 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8194 {
8195 tls_ty = TLS_TLS | TLS_TPREL;
8196 tls_m = 0;
8197 }
8198
8199 /* Generate relocs for the dynamic linker. */
8200 if ((info->shared || indx != 0)
8201 && (offp == &htab->tlsld_got.offset
8202 || h == NULL
8203 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8204 || h->root.type != bfd_link_hash_undefweak))
8205 {
8206 asection *rsec = htab->relgot;
8207 bfd_byte * loc;
8208
8209 if (ifunc != NULL)
8210 rsec = htab->reliplt;
8211 outrel.r_offset = (htab->got->output_section->vma
8212 + htab->got->output_offset
8213 + off);
8214 outrel.r_addend = 0;
8215 if (tls_ty & (TLS_LD | TLS_GD))
8216 {
8217 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8218 if (tls_ty == (TLS_TLS | TLS_GD))
8219 {
8220 loc = rsec->contents;
8221 loc += (rsec->reloc_count++
8222 * sizeof (Elf32_External_Rela));
8223 bfd_elf32_swap_reloca_out (output_bfd,
8224 &outrel, loc);
8225 outrel.r_offset += 4;
8226 outrel.r_info
8227 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8228 }
8229 }
8230 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8231 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8232 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8233 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8234 else if (indx != 0)
8235 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8236 else if (ifunc != NULL)
8237 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8238 else
8239 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8240 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8241 {
8242 outrel.r_addend += relocation;
8243 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8244 {
8245 if (htab->elf.tls_sec == NULL)
8246 outrel.r_addend = 0;
8247 else
8248 outrel.r_addend -= htab->elf.tls_sec->vma;
8249 }
8250 }
8251 loc = rsec->contents;
8252 loc += (rsec->reloc_count++
8253 * sizeof (Elf32_External_Rela));
8254 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8255 }
8256
8257 /* Init the .got section contents if we're not
8258 emitting a reloc. */
8259 else
8260 {
8261 bfd_vma value = relocation;
8262
8263 if (tls_ty == (TLS_TLS | TLS_LD))
8264 value = 1;
8265 else if (tls_ty != 0)
8266 {
8267 if (htab->elf.tls_sec == NULL)
8268 value = 0;
8269 else
8270 {
8271 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8272 if (tls_ty == (TLS_TLS | TLS_TPREL))
8273 value += DTP_OFFSET - TP_OFFSET;
8274 }
8275
8276 if (tls_ty == (TLS_TLS | TLS_GD))
8277 {
8278 bfd_put_32 (output_bfd, value,
8279 htab->got->contents + off + 4);
8280 value = 1;
8281 }
8282 }
8283 bfd_put_32 (output_bfd, value,
8284 htab->got->contents + off);
8285 }
8286
8287 off += 4;
8288 if (tls_ty & (TLS_LD | TLS_GD))
8289 off += 4;
8290 }
8291 while (tls_m != 0);
8292
8293 off = *offp;
8294 *offp = off | 1;
8295 }
8296
8297 if (off >= (bfd_vma) -2)
8298 abort ();
8299
8300 if ((tls_type & TLS_TLS) != 0)
8301 {
8302 if (tls_type != (TLS_TLS | TLS_LD))
8303 {
8304 if ((tls_mask & TLS_LD) != 0
8305 && !(h == NULL
8306 || !h->def_dynamic))
8307 off += 8;
8308 if (tls_type != (TLS_TLS | TLS_GD))
8309 {
8310 if ((tls_mask & TLS_GD) != 0)
8311 off += 8;
8312 if (tls_type != (TLS_TLS | TLS_DTPREL))
8313 {
8314 if ((tls_mask & TLS_DTPREL) != 0)
8315 off += 4;
8316 }
8317 }
8318 }
8319 }
8320
8321 relocation = (htab->got->output_section->vma
8322 + htab->got->output_offset
8323 + off
8324 - SYM_VAL (htab->elf.hgot));
8325
8326 /* Addends on got relocations don't make much sense.
8327 x+off@got is actually x@got+off, and since the got is
8328 generated by a hash table traversal, the value in the
8329 got at entry m+n bears little relation to the entry m. */
8330 if (addend != 0)
8331 info->callbacks->einfo
8332 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8333 input_bfd, input_section, rel->r_offset,
8334 howto->name,
8335 sym_name);
8336 }
8337 break;
8338
8339 /* Relocations that need no special processing. */
8340 case R_PPC_LOCAL24PC:
8341 /* It makes no sense to point a local relocation
8342 at a symbol not in this object. */
8343 if (unresolved_reloc)
8344 {
8345 if (! (*info->callbacks->undefined_symbol) (info,
8346 h->root.root.string,
8347 input_bfd,
8348 input_section,
8349 rel->r_offset,
8350 TRUE))
8351 return FALSE;
8352 continue;
8353 }
8354 break;
8355
8356 case R_PPC_DTPREL16:
8357 case R_PPC_DTPREL16_LO:
8358 case R_PPC_DTPREL16_HI:
8359 case R_PPC_DTPREL16_HA:
8360 if (htab->elf.tls_sec != NULL)
8361 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8362 break;
8363
8364 /* Relocations that may need to be propagated if this is a shared
8365 object. */
8366 case R_PPC_TPREL16:
8367 case R_PPC_TPREL16_LO:
8368 case R_PPC_TPREL16_HI:
8369 case R_PPC_TPREL16_HA:
8370 if (h != NULL
8371 && h->root.type == bfd_link_hash_undefweak
8372 && h->dynindx == -1)
8373 {
8374 /* Make this relocation against an undefined weak symbol
8375 resolve to zero. This is really just a tweak, since
8376 code using weak externs ought to check that they are
8377 defined before using them. */
8378 bfd_byte *p = contents + rel->r_offset - d_offset;
8379 unsigned int insn = bfd_get_32 (output_bfd, p);
8380 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8381 if (insn != 0)
8382 bfd_put_32 (output_bfd, insn, p);
8383 break;
8384 }
8385 if (htab->elf.tls_sec != NULL)
8386 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8387 /* The TPREL16 relocs shouldn't really be used in shared
8388 libs as they will result in DT_TEXTREL being set, but
8389 support them anyway. */
8390 goto dodyn;
8391
8392 case R_PPC_TPREL32:
8393 if (htab->elf.tls_sec != NULL)
8394 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8395 goto dodyn;
8396
8397 case R_PPC_DTPREL32:
8398 if (htab->elf.tls_sec != NULL)
8399 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8400 goto dodyn;
8401
8402 case R_PPC_DTPMOD32:
8403 relocation = 1;
8404 addend = 0;
8405 goto dodyn;
8406
8407 case R_PPC_REL16:
8408 case R_PPC_REL16_LO:
8409 case R_PPC_REL16_HI:
8410 case R_PPC_REL16_HA:
8411 break;
8412
8413 case R_PPC_REL32:
8414 if (h == NULL || h == htab->elf.hgot)
8415 break;
8416 /* fall through */
8417
8418 case R_PPC_ADDR32:
8419 case R_PPC_ADDR16:
8420 case R_PPC_ADDR16_LO:
8421 case R_PPC_ADDR16_HI:
8422 case R_PPC_ADDR16_HA:
8423 case R_PPC_UADDR32:
8424 case R_PPC_UADDR16:
8425 goto dodyn;
8426
8427 case R_PPC_VLE_REL8:
8428 case R_PPC_VLE_REL15:
8429 case R_PPC_VLE_REL24:
8430 case R_PPC_REL24:
8431 case R_PPC_REL14:
8432 case R_PPC_REL14_BRTAKEN:
8433 case R_PPC_REL14_BRNTAKEN:
8434 /* If these relocations are not to a named symbol, they can be
8435 handled right here, no need to bother the dynamic linker. */
8436 if (SYMBOL_CALLS_LOCAL (info, h)
8437 || h == htab->elf.hgot)
8438 break;
8439 /* fall through */
8440
8441 case R_PPC_ADDR24:
8442 case R_PPC_ADDR14:
8443 case R_PPC_ADDR14_BRTAKEN:
8444 case R_PPC_ADDR14_BRNTAKEN:
8445 if (h != NULL && !info->shared)
8446 break;
8447 /* fall through */
8448
8449 dodyn:
8450 if ((input_section->flags & SEC_ALLOC) == 0
8451 || is_vxworks_tls)
8452 break;
8453
8454 if ((info->shared
8455 && !(h != NULL
8456 && ((h->root.type == bfd_link_hash_undefined
8457 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8458 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8459 || (h->root.type == bfd_link_hash_undefweak
8460 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8461 && (must_be_dyn_reloc (info, r_type)
8462 || !SYMBOL_CALLS_LOCAL (info, h)))
8463 || (ELIMINATE_COPY_RELOCS
8464 && !info->shared
8465 && h != NULL
8466 && h->dynindx != -1
8467 && !h->non_got_ref
8468 && !h->def_regular))
8469 {
8470 int skip;
8471 bfd_byte *loc;
8472 asection *sreloc;
8473 #ifdef DEBUG
8474 fprintf (stderr, "ppc_elf_relocate_section needs to "
8475 "create relocation for %s\n",
8476 (h && h->root.root.string
8477 ? h->root.root.string : "<unknown>"));
8478 #endif
8479
8480 /* When generating a shared object, these relocations
8481 are copied into the output file to be resolved at run
8482 time. */
8483 sreloc = elf_section_data (input_section)->sreloc;
8484 if (ifunc)
8485 sreloc = htab->reliplt;
8486 if (sreloc == NULL)
8487 return FALSE;
8488
8489 skip = 0;
8490 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8491 input_section,
8492 rel->r_offset);
8493 if (outrel.r_offset == (bfd_vma) -1
8494 || outrel.r_offset == (bfd_vma) -2)
8495 skip = (int) outrel.r_offset;
8496 outrel.r_offset += (input_section->output_section->vma
8497 + input_section->output_offset);
8498
8499 if (skip)
8500 memset (&outrel, 0, sizeof outrel);
8501 else if ((h != NULL
8502 && (h->root.type == bfd_link_hash_undefined
8503 || h->root.type == bfd_link_hash_undefweak))
8504 || !SYMBOL_REFERENCES_LOCAL (info, h))
8505 {
8506 BFD_ASSERT (h->dynindx != -1);
8507 unresolved_reloc = FALSE;
8508 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8509 outrel.r_addend = rel->r_addend;
8510 }
8511 else
8512 {
8513 outrel.r_addend = relocation + rel->r_addend;
8514
8515 if (r_type != R_PPC_ADDR32)
8516 {
8517 long indx = 0;
8518
8519 if (ifunc != NULL)
8520 {
8521 /* If we get here when building a static
8522 executable, then the libc startup function
8523 responsible for applying indirect function
8524 relocations is going to complain about
8525 the reloc type.
8526 If we get here when building a dynamic
8527 executable, it will be because we have
8528 a text relocation. The dynamic loader
8529 will set the text segment writable and
8530 non-executable to apply text relocations.
8531 So we'll segfault when trying to run the
8532 indirection function to resolve the reloc. */
8533 info->callbacks->einfo
8534 (_("%P: %H: relocation %s for indirect "
8535 "function %s unsupported\n"),
8536 input_bfd, input_section, rel->r_offset,
8537 howto->name,
8538 sym_name);
8539 ret = FALSE;
8540 }
8541 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8542 ;
8543 else if (sec == NULL || sec->owner == NULL)
8544 {
8545 bfd_set_error (bfd_error_bad_value);
8546 ret = FALSE;
8547 }
8548 else
8549 {
8550 asection *osec;
8551
8552 /* We are turning this relocation into one
8553 against a section symbol. It would be
8554 proper to subtract the symbol's value,
8555 osec->vma, from the emitted reloc addend,
8556 but ld.so expects buggy relocs.
8557 FIXME: Why not always use a zero index? */
8558 osec = sec->output_section;
8559 indx = elf_section_data (osec)->dynindx;
8560 if (indx == 0)
8561 {
8562 osec = htab->elf.text_index_section;
8563 indx = elf_section_data (osec)->dynindx;
8564 }
8565 BFD_ASSERT (indx != 0);
8566 #ifdef DEBUG
8567 if (indx == 0)
8568 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8569 indx, osec->name, osec->flags,
8570 h->root.root.string);
8571 #endif
8572 }
8573
8574 outrel.r_info = ELF32_R_INFO (indx, r_type);
8575 }
8576 else if (ifunc != NULL)
8577 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8578 else
8579 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8580 }
8581
8582 loc = sreloc->contents;
8583 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8584 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8585
8586 if (skip == -1)
8587 continue;
8588
8589 /* This reloc will be computed at runtime. We clear the memory
8590 so that it contains predictable value. */
8591 if (! skip
8592 && ((input_section->flags & SEC_ALLOC) != 0
8593 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8594 {
8595 relocation = howto->pc_relative ? outrel.r_offset : 0;
8596 addend = 0;
8597 break;
8598 }
8599 }
8600 break;
8601
8602 case R_PPC_RELAX_PLT:
8603 case R_PPC_RELAX_PLTREL24:
8604 if (h != NULL)
8605 {
8606 struct plt_entry *ent;
8607 bfd_vma got2_addend = 0;
8608
8609 if (r_type == R_PPC_RELAX_PLTREL24)
8610 {
8611 if (info->shared)
8612 got2_addend = addend;
8613 addend = 0;
8614 }
8615 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8616 if (htab->plt_type == PLT_NEW)
8617 relocation = (htab->glink->output_section->vma
8618 + htab->glink->output_offset
8619 + ent->glink_offset);
8620 else
8621 relocation = (htab->plt->output_section->vma
8622 + htab->plt->output_offset
8623 + ent->plt.offset);
8624 }
8625 /* Fall thru */
8626
8627 case R_PPC_RELAX:
8628 {
8629 const int *stub;
8630 size_t size;
8631 size_t insn_offset = rel->r_offset;
8632 unsigned int insn;
8633
8634 if (info->shared)
8635 {
8636 relocation -= (input_section->output_section->vma
8637 + input_section->output_offset
8638 + rel->r_offset - 4);
8639 stub = shared_stub_entry;
8640 bfd_put_32 (output_bfd, stub[0], contents + insn_offset - 12);
8641 bfd_put_32 (output_bfd, stub[1], contents + insn_offset - 8);
8642 bfd_put_32 (output_bfd, stub[2], contents + insn_offset - 4);
8643 stub += 3;
8644 size = ARRAY_SIZE (shared_stub_entry) - 3;
8645 }
8646 else
8647 {
8648 stub = stub_entry;
8649 size = ARRAY_SIZE (stub_entry);
8650 }
8651
8652 relocation += addend;
8653 if (info->relocatable)
8654 relocation = 0;
8655
8656 /* First insn is HA, second is LO. */
8657 insn = *stub++;
8658 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
8659 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8660 insn_offset += 4;
8661
8662 insn = *stub++;
8663 insn |= relocation & 0xffff;
8664 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8665 insn_offset += 4;
8666 size -= 2;
8667
8668 while (size != 0)
8669 {
8670 insn = *stub++;
8671 --size;
8672 bfd_put_32 (output_bfd, insn, contents + insn_offset);
8673 insn_offset += 4;
8674 }
8675
8676 /* Rewrite the reloc and convert one of the trailing nop
8677 relocs to describe this relocation. */
8678 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8679 /* The relocs are at the bottom 2 bytes */
8680 rel[0].r_offset += d_offset;
8681 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8682 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8683 rel[1].r_offset += 4;
8684 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8685 rel++;
8686 }
8687 continue;
8688
8689 /* Indirect .sdata relocation. */
8690 case R_PPC_EMB_SDAI16:
8691 BFD_ASSERT (htab->sdata[0].section != NULL);
8692 if (!is_static_defined (htab->sdata[0].sym))
8693 {
8694 unresolved_reloc = TRUE;
8695 break;
8696 }
8697 relocation
8698 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8699 h, relocation, rel);
8700 addend = 0;
8701 break;
8702
8703 /* Indirect .sdata2 relocation. */
8704 case R_PPC_EMB_SDA2I16:
8705 BFD_ASSERT (htab->sdata[1].section != NULL);
8706 if (!is_static_defined (htab->sdata[1].sym))
8707 {
8708 unresolved_reloc = TRUE;
8709 break;
8710 }
8711 relocation
8712 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8713 h, relocation, rel);
8714 addend = 0;
8715 break;
8716
8717 /* Handle the TOC16 reloc. We want to use the offset within the .got
8718 section, not the actual VMA. This is appropriate when generating
8719 an embedded ELF object, for which the .got section acts like the
8720 AIX .toc section. */
8721 case R_PPC_TOC16: /* phony GOT16 relocations */
8722 if (sec == NULL || sec->output_section == NULL)
8723 {
8724 unresolved_reloc = TRUE;
8725 break;
8726 }
8727 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8728 ".got") == 0
8729 || strcmp (bfd_get_section_name (sec->owner, sec),
8730 ".cgot") == 0);
8731
8732 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8733 break;
8734
8735 case R_PPC_PLTREL24:
8736 if (h != NULL && ifunc == NULL)
8737 {
8738 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8739 info->shared ? addend : 0);
8740 if (ent == NULL
8741 || htab->plt == NULL)
8742 {
8743 /* We didn't make a PLT entry for this symbol. This
8744 happens when statically linking PIC code, or when
8745 using -Bsymbolic. */
8746 }
8747 else
8748 {
8749 /* Relocation is to the entry for this symbol in the
8750 procedure linkage table. */
8751 unresolved_reloc = FALSE;
8752 if (htab->plt_type == PLT_NEW)
8753 relocation = (htab->glink->output_section->vma
8754 + htab->glink->output_offset
8755 + ent->glink_offset);
8756 else
8757 relocation = (htab->plt->output_section->vma
8758 + htab->plt->output_offset
8759 + ent->plt.offset);
8760 }
8761 }
8762
8763 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8764 addend specifies the GOT pointer offset within .got2.
8765 Don't apply it to the relocation field. */
8766 addend = 0;
8767 break;
8768
8769 /* Relocate against _SDA_BASE_. */
8770 case R_PPC_SDAREL16:
8771 {
8772 const char *name;
8773 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8774
8775 if (sec == NULL
8776 || sec->output_section == NULL
8777 || !is_static_defined (sda))
8778 {
8779 unresolved_reloc = TRUE;
8780 break;
8781 }
8782 addend -= SYM_VAL (sda);
8783
8784 name = bfd_get_section_name (output_bfd, sec->output_section);
8785 if (!(strcmp (name, ".sdata") == 0
8786 || strcmp (name, ".sbss") == 0))
8787 {
8788 info->callbacks->einfo
8789 (_("%P: %B: the target (%s) of a %s relocation is "
8790 "in the wrong output section (%s)\n"),
8791 input_bfd,
8792 sym_name,
8793 howto->name,
8794 name);
8795 }
8796 }
8797 break;
8798
8799 /* Relocate against _SDA2_BASE_. */
8800 case R_PPC_EMB_SDA2REL:
8801 {
8802 const char *name;
8803 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8804
8805 if (sec == NULL
8806 || sec->output_section == NULL
8807 || !is_static_defined (sda))
8808 {
8809 unresolved_reloc = TRUE;
8810 break;
8811 }
8812 addend -= SYM_VAL (sda);
8813
8814 name = bfd_get_section_name (output_bfd, sec->output_section);
8815 if (!(strcmp (name, ".sdata2") == 0
8816 || strcmp (name, ".sbss2") == 0))
8817 {
8818 info->callbacks->einfo
8819 (_("%P: %B: the target (%s) of a %s relocation is "
8820 "in the wrong output section (%s)\n"),
8821 input_bfd,
8822 sym_name,
8823 howto->name,
8824 name);
8825 }
8826 }
8827 break;
8828
8829 case R_PPC_VLE_LO16A:
8830 relocation = relocation + addend;
8831 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8832 relocation, split16a_type);
8833 continue;
8834
8835 case R_PPC_VLE_LO16D:
8836 relocation = relocation + addend;
8837 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8838 relocation, split16d_type);
8839 continue;
8840
8841 case R_PPC_VLE_HI16A:
8842 relocation = (relocation + addend) >> 16;
8843 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8844 relocation, split16a_type);
8845 continue;
8846
8847 case R_PPC_VLE_HI16D:
8848 relocation = (relocation + addend) >> 16;
8849 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8850 relocation, split16d_type);
8851 continue;
8852
8853 case R_PPC_VLE_HA16A:
8854 relocation = (relocation + addend + 0x8000) >> 16;
8855 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8856 relocation, split16a_type);
8857 continue;
8858
8859 case R_PPC_VLE_HA16D:
8860 relocation = (relocation + addend + 0x8000) >> 16;
8861 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
8862 relocation, split16d_type);
8863 continue;
8864
8865 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8866 case R_PPC_EMB_SDA21:
8867 case R_PPC_VLE_SDA21:
8868 case R_PPC_EMB_RELSDA:
8869 case R_PPC_VLE_SDA21_LO:
8870 {
8871 const char *name;
8872 int reg;
8873 unsigned int insn;
8874 struct elf_link_hash_entry *sda = NULL;
8875
8876 if (sec == NULL || sec->output_section == NULL)
8877 {
8878 unresolved_reloc = TRUE;
8879 break;
8880 }
8881
8882 name = bfd_get_section_name (output_bfd, sec->output_section);
8883 if (strcmp (name, ".sdata") == 0
8884 || strcmp (name, ".sbss") == 0)
8885 {
8886 reg = 13;
8887 sda = htab->sdata[0].sym;
8888 }
8889 else if (strcmp (name, ".sdata2") == 0
8890 || strcmp (name, ".sbss2") == 0)
8891 {
8892 reg = 2;
8893 sda = htab->sdata[1].sym;
8894 }
8895 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8896 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8897 {
8898 reg = 0;
8899 }
8900 else
8901 {
8902 info->callbacks->einfo
8903 (_("%P: %B: the target (%s) of a %s relocation is "
8904 "in the wrong output section (%s)\n"),
8905 input_bfd,
8906 sym_name,
8907 howto->name,
8908 name);
8909
8910 bfd_set_error (bfd_error_bad_value);
8911 ret = FALSE;
8912 continue;
8913 }
8914
8915 if (sda != NULL)
8916 {
8917 if (!is_static_defined (sda))
8918 {
8919 unresolved_reloc = TRUE;
8920 break;
8921 }
8922 addend -= SYM_VAL (sda);
8923 }
8924
8925 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8926 if (reg == 0
8927 && (r_type == R_PPC_VLE_SDA21
8928 || r_type == R_PPC_VLE_SDA21_LO))
8929 {
8930 relocation = relocation + addend;
8931 addend = 0;
8932
8933 /* Force e_li insn, keeping RT from original insn. */
8934 insn &= 0x1f << 21;
8935 insn |= 28u << 26;
8936
8937 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
8938 /* Top 4 bits of value to 17..20. */
8939 insn |= (relocation & 0xf0000) >> 5;
8940 /* Next 5 bits of the value to 11..15. */
8941 insn |= (relocation & 0xf800) << 5;
8942 /* And the final 11 bits of the value to bits 21 to 31. */
8943 insn |= relocation & 0x7ff;
8944
8945 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8946
8947 if (r_type == R_PPC_VLE_SDA21
8948 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
8949 goto overflow;
8950 continue;
8951 }
8952 else if (r_type == R_PPC_EMB_SDA21
8953 || r_type == R_PPC_VLE_SDA21
8954 || r_type == R_PPC_VLE_SDA21_LO)
8955 {
8956 /* Fill in register field. */
8957 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8958 }
8959 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8960 }
8961 break;
8962
8963 case R_PPC_VLE_SDAREL_LO16A:
8964 case R_PPC_VLE_SDAREL_LO16D:
8965 case R_PPC_VLE_SDAREL_HI16A:
8966 case R_PPC_VLE_SDAREL_HI16D:
8967 case R_PPC_VLE_SDAREL_HA16A:
8968 case R_PPC_VLE_SDAREL_HA16D:
8969 {
8970 bfd_vma value;
8971 const char *name;
8972 //int reg;
8973 struct elf_link_hash_entry *sda = NULL;
8974
8975 if (sec == NULL || sec->output_section == NULL)
8976 {
8977 unresolved_reloc = TRUE;
8978 break;
8979 }
8980
8981 name = bfd_get_section_name (output_bfd, sec->output_section);
8982 if (strcmp (name, ".sdata") == 0
8983 || strcmp (name, ".sbss") == 0)
8984 {
8985 //reg = 13;
8986 sda = htab->sdata[0].sym;
8987 }
8988 else if (strcmp (name, ".sdata2") == 0
8989 || strcmp (name, ".sbss2") == 0)
8990 {
8991 //reg = 2;
8992 sda = htab->sdata[1].sym;
8993 }
8994 else
8995 {
8996 (*_bfd_error_handler)
8997 (_("%B: the target (%s) of a %s relocation is "
8998 "in the wrong output section (%s)"),
8999 input_bfd,
9000 sym_name,
9001 howto->name,
9002 name);
9003
9004 bfd_set_error (bfd_error_bad_value);
9005 ret = FALSE;
9006 continue;
9007 }
9008
9009 if (sda != NULL)
9010 {
9011 if (!is_static_defined (sda))
9012 {
9013 unresolved_reloc = TRUE;
9014 break;
9015 }
9016 }
9017
9018 value = (sda->root.u.def.section->output_section->vma
9019 + sda->root.u.def.section->output_offset
9020 + addend);
9021
9022 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9023 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9024 value, split16a_type);
9025 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9026 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9027 value, split16d_type);
9028 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9029 {
9030 value = value >> 16;
9031 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9032 value, split16a_type);
9033 }
9034 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9035 {
9036 value = value >> 16;
9037 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9038 value, split16d_type);
9039 }
9040 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9041 {
9042 value = (value + 0x8000) >> 16;
9043 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9044 value, split16a_type);
9045 }
9046 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9047 {
9048 value = (value + 0x8000) >> 16;
9049 ppc_elf_vle_split16 (output_bfd, contents + rel->r_offset,
9050 value, split16d_type);
9051 }
9052 }
9053 continue;
9054
9055 /* Relocate against the beginning of the section. */
9056 case R_PPC_SECTOFF:
9057 case R_PPC_SECTOFF_LO:
9058 case R_PPC_SECTOFF_HI:
9059 case R_PPC_SECTOFF_HA:
9060 if (sec == NULL || sec->output_section == NULL)
9061 {
9062 unresolved_reloc = TRUE;
9063 break;
9064 }
9065 addend -= sec->output_section->vma;
9066 break;
9067
9068 /* Negative relocations. */
9069 case R_PPC_EMB_NADDR32:
9070 case R_PPC_EMB_NADDR16:
9071 case R_PPC_EMB_NADDR16_LO:
9072 case R_PPC_EMB_NADDR16_HI:
9073 case R_PPC_EMB_NADDR16_HA:
9074 addend -= 2 * relocation;
9075 break;
9076
9077 case R_PPC_COPY:
9078 case R_PPC_GLOB_DAT:
9079 case R_PPC_JMP_SLOT:
9080 case R_PPC_RELATIVE:
9081 case R_PPC_IRELATIVE:
9082 case R_PPC_PLT32:
9083 case R_PPC_PLTREL32:
9084 case R_PPC_PLT16_LO:
9085 case R_PPC_PLT16_HI:
9086 case R_PPC_PLT16_HA:
9087 case R_PPC_ADDR30:
9088 case R_PPC_EMB_RELSEC16:
9089 case R_PPC_EMB_RELST_LO:
9090 case R_PPC_EMB_RELST_HI:
9091 case R_PPC_EMB_RELST_HA:
9092 case R_PPC_EMB_BIT_FLD:
9093 info->callbacks->einfo
9094 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9095 input_bfd,
9096 howto->name,
9097 sym_name);
9098
9099 bfd_set_error (bfd_error_invalid_operation);
9100 ret = FALSE;
9101 continue;
9102 }
9103
9104 /* Do any further special processing. */
9105 switch (r_type)
9106 {
9107 default:
9108 break;
9109
9110 case R_PPC_ADDR16_HA:
9111 case R_PPC_REL16_HA:
9112 case R_PPC_SECTOFF_HA:
9113 case R_PPC_TPREL16_HA:
9114 case R_PPC_DTPREL16_HA:
9115 case R_PPC_EMB_NADDR16_HA:
9116 case R_PPC_EMB_RELST_HA:
9117 /* It's just possible that this symbol is a weak symbol
9118 that's not actually defined anywhere. In that case,
9119 'sec' would be NULL, and we should leave the symbol
9120 alone (it will be set to zero elsewhere in the link). */
9121 if (sec == NULL)
9122 break;
9123 /* Fall thru */
9124
9125 case R_PPC_PLT16_HA:
9126 case R_PPC_GOT16_HA:
9127 case R_PPC_GOT_TLSGD16_HA:
9128 case R_PPC_GOT_TLSLD16_HA:
9129 case R_PPC_GOT_TPREL16_HA:
9130 case R_PPC_GOT_DTPREL16_HA:
9131 /* Add 0x10000 if sign bit in 0:15 is set.
9132 Bits 0:15 are not used. */
9133 addend += 0x8000;
9134 break;
9135
9136 case R_PPC_ADDR16:
9137 case R_PPC_ADDR16_LO:
9138 case R_PPC_GOT16:
9139 case R_PPC_GOT16_LO:
9140 case R_PPC_SDAREL16:
9141 case R_PPC_SECTOFF:
9142 case R_PPC_SECTOFF_LO:
9143 case R_PPC_DTPREL16:
9144 case R_PPC_DTPREL16_LO:
9145 case R_PPC_TPREL16:
9146 case R_PPC_TPREL16_LO:
9147 case R_PPC_GOT_TLSGD16:
9148 case R_PPC_GOT_TLSGD16_LO:
9149 case R_PPC_GOT_TLSLD16:
9150 case R_PPC_GOT_TLSLD16_LO:
9151 case R_PPC_GOT_DTPREL16:
9152 case R_PPC_GOT_DTPREL16_LO:
9153 case R_PPC_GOT_TPREL16:
9154 case R_PPC_GOT_TPREL16_LO:
9155 {
9156 /* The 32-bit ABI lacks proper relocations to deal with
9157 certain 64-bit instructions. Prevent damage to bits
9158 that make up part of the insn opcode. */
9159 unsigned int insn, mask, lobit;
9160
9161 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9162 mask = 0;
9163 if (is_insn_ds_form (insn))
9164 mask = 3;
9165 else if (is_insn_dq_form (insn))
9166 mask = 15;
9167 else
9168 break;
9169 lobit = mask & (relocation + addend);
9170 if (lobit != 0)
9171 {
9172 addend -= lobit;
9173 info->callbacks->einfo
9174 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9175 input_bfd, input_section, rel->r_offset,
9176 howto->name, sym_name, mask + 1);
9177 bfd_set_error (bfd_error_bad_value);
9178 ret = FALSE;
9179 }
9180 addend += insn & mask;
9181 }
9182 break;
9183 }
9184
9185 #ifdef DEBUG
9186 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9187 "offset = %ld, addend = %ld\n",
9188 howto->name,
9189 (int) r_type,
9190 sym_name,
9191 r_symndx,
9192 (long) rel->r_offset,
9193 (long) addend);
9194 #endif
9195
9196 if (unresolved_reloc
9197 && !((input_section->flags & SEC_DEBUGGING) != 0
9198 && h->def_dynamic)
9199 && _bfd_elf_section_offset (output_bfd, info, input_section,
9200 rel->r_offset) != (bfd_vma) -1)
9201 {
9202 info->callbacks->einfo
9203 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9204 input_bfd, input_section, rel->r_offset,
9205 howto->name,
9206 sym_name);
9207 ret = FALSE;
9208 }
9209
9210 /* 16-bit fields in insns mostly have signed values, but a
9211 few insns have 16-bit unsigned values. Really, we should
9212 have different reloc types. */
9213 if (howto->complain_on_overflow != complain_overflow_dont
9214 && howto->dst_mask == 0xffff
9215 && (input_section->flags & SEC_CODE) != 0)
9216 {
9217 enum complain_overflow complain = complain_overflow_signed;
9218
9219 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9220 {
9221 unsigned int insn;
9222
9223 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9224 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9225 complain = complain_overflow_bitfield;
9226 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9227 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9228 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9229 complain = complain_overflow_unsigned;
9230 }
9231 if (howto->complain_on_overflow != complain)
9232 {
9233 alt_howto = *howto;
9234 alt_howto.complain_on_overflow = complain;
9235 howto = &alt_howto;
9236 }
9237 }
9238
9239 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9240 rel->r_offset, relocation, addend);
9241
9242 if (r != bfd_reloc_ok)
9243 {
9244 if (r == bfd_reloc_overflow)
9245 {
9246 overflow:
9247 if (warned)
9248 continue;
9249 if (h != NULL
9250 && h->root.type == bfd_link_hash_undefweak
9251 && howto->pc_relative)
9252 {
9253 /* Assume this is a call protected by other code that
9254 detect the symbol is undefined. If this is the case,
9255 we can safely ignore the overflow. If not, the
9256 program is hosed anyway, and a little warning isn't
9257 going to help. */
9258
9259 continue;
9260 }
9261
9262 if (! (*info->callbacks->reloc_overflow) (info,
9263 (h ? &h->root : NULL),
9264 sym_name,
9265 howto->name,
9266 rel->r_addend,
9267 input_bfd,
9268 input_section,
9269 rel->r_offset))
9270 return FALSE;
9271 }
9272 else
9273 {
9274 info->callbacks->einfo
9275 (_("%P: %H: %s reloc against `%s': error %d\n"),
9276 input_bfd, input_section, rel->r_offset,
9277 howto->name, sym_name, (int) r);
9278 ret = FALSE;
9279 }
9280 }
9281 }
9282
9283 #ifdef DEBUG
9284 fprintf (stderr, "\n");
9285 #endif
9286
9287 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9288 && input_section->size != input_section->rawsize
9289 && (strcmp (input_section->output_section->name, ".init") == 0
9290 || strcmp (input_section->output_section->name, ".fini") == 0))
9291 {
9292 /* Branch around the trampolines. */
9293 unsigned int insn = B + input_section->size - input_section->rawsize;
9294 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9295 }
9296
9297 if (htab->params->ppc476_workaround
9298 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9299 && (!info->relocatable
9300 || (input_section->output_section->alignment_power
9301 >= htab->params->pagesize_p2)))
9302 {
9303 struct ppc_elf_relax_info *relax_info;
9304 bfd_vma start_addr, end_addr, addr;
9305 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9306
9307 relax_info = elf_section_data (input_section)->sec_info;
9308 if (relax_info->workaround_size != 0)
9309 {
9310 bfd_byte *p;
9311 unsigned int n;
9312 bfd_byte fill[4];
9313
9314 bfd_put_32 (input_bfd, BA, fill);
9315 p = contents + input_section->size - relax_info->workaround_size;
9316 n = relax_info->workaround_size >> 2;
9317 while (n--)
9318 {
9319 memcpy (p, fill, 4);
9320 p += 4;
9321 }
9322 }
9323
9324 /* The idea is: Replace the last instruction on a page with a
9325 branch to a patch area. Put the insn there followed by a
9326 branch back to the next page. Complicated a little by
9327 needing to handle moved conditional branches, and by not
9328 wanting to touch data-in-text. */
9329
9330 start_addr = (input_section->output_section->vma
9331 + input_section->output_offset);
9332 end_addr = (start_addr + input_section->size
9333 - relax_info->workaround_size);
9334 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9335 addr < end_addr;
9336 addr += pagesize)
9337 {
9338 bfd_vma offset = addr - start_addr;
9339 Elf_Internal_Rela *lo, *hi;
9340 bfd_boolean is_data;
9341 bfd_vma patch_off, patch_addr;
9342 unsigned int insn;
9343
9344 /* Do we have a data reloc at this offset? If so, leave
9345 the word alone. */
9346 is_data = FALSE;
9347 lo = relocs;
9348 hi = relend;
9349 rel = NULL;
9350 while (lo < hi)
9351 {
9352 rel = lo + (hi - lo) / 2;
9353 if (rel->r_offset < offset)
9354 lo = rel + 1;
9355 else if (rel->r_offset > offset + 3)
9356 hi = rel;
9357 else
9358 {
9359 switch (ELF32_R_TYPE (rel->r_info))
9360 {
9361 case R_PPC_ADDR32:
9362 case R_PPC_UADDR32:
9363 case R_PPC_REL32:
9364 case R_PPC_ADDR30:
9365 is_data = TRUE;
9366 break;
9367 default:
9368 break;
9369 }
9370 break;
9371 }
9372 }
9373 if (is_data)
9374 continue;
9375
9376 /* Some instructions can be left alone too. Unconditional
9377 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9378 avoid the icache failure.
9379
9380 The problem occurs due to prefetch across a page boundary
9381 where stale instructions can be fetched from the next
9382 page, and the mechanism for flushing these bad
9383 instructions fails under certain circumstances. The
9384 unconditional branches:
9385 1) Branch: b, bl, ba, bla,
9386 2) Branch Conditional: bc, bca, bcl, bcla,
9387 3) Branch Conditional to Link Register: bclr, bclrl,
9388 where (2) and (3) have BO=0x14 making them unconditional,
9389 prevent the bad prefetch because the prefetch itself is
9390 affected by these instructions. This happens even if the
9391 instruction is not executed.
9392
9393 A bctr example:
9394 .
9395 . lis 9,new_page@ha
9396 . addi 9,9,new_page@l
9397 . mtctr 9
9398 . bctr
9399 . nop
9400 . nop
9401 . new_page:
9402 .
9403 The bctr is not predicted taken due to ctr not being
9404 ready, so prefetch continues on past the bctr into the
9405 new page which might have stale instructions. If they
9406 fail to be flushed, then they will be executed after the
9407 bctr executes. Either of the following modifications
9408 prevent the bad prefetch from happening in the first
9409 place:
9410 .
9411 . lis 9,new_page@ha lis 9,new_page@ha
9412 . addi 9,9,new_page@l addi 9,9,new_page@l
9413 . mtctr 9 mtctr 9
9414 . bctr bctr
9415 . nop b somewhere_else
9416 . b somewhere_else nop
9417 . new_page: new_page:
9418 . */
9419 insn = bfd_get_32 (input_bfd, contents + offset);
9420 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9421 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9422 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9423 || ((insn & (0x3f << 26)) == (19u << 26)
9424 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9425 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9426 continue;
9427
9428 patch_addr = (start_addr + input_section->size
9429 - relax_info->workaround_size);
9430 patch_addr = (patch_addr + 15) & -16;
9431 patch_off = patch_addr - start_addr;
9432 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9433
9434 if (rel != NULL
9435 && rel->r_offset >= offset
9436 && rel->r_offset < offset + 4)
9437 {
9438 /* If the insn we are patching had a reloc, adjust the
9439 reloc r_offset so that the reloc applies to the moved
9440 location. This matters for -r and --emit-relocs. */
9441 if (rel + 1 != relend)
9442 {
9443 Elf_Internal_Rela tmp = *rel;
9444
9445 /* Keep the relocs sorted by r_offset. */
9446 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9447 relend[-1] = tmp;
9448 }
9449 relend[-1].r_offset += patch_off - offset;
9450 }
9451 else
9452 rel = NULL;
9453
9454 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9455 && (insn & 2) == 0 /* relative */)
9456 {
9457 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9458
9459 delta += offset - patch_off;
9460 if (info->relocatable && rel != NULL)
9461 delta = 0;
9462 if (!info->relocatable && rel != NULL)
9463 {
9464 enum elf_ppc_reloc_type r_type;
9465
9466 r_type = ELF32_R_TYPE (relend[-1].r_info);
9467 if (r_type == R_PPC_REL14_BRTAKEN)
9468 insn |= BRANCH_PREDICT_BIT;
9469 else if (r_type == R_PPC_REL14_BRNTAKEN)
9470 insn &= ~BRANCH_PREDICT_BIT;
9471 else
9472 BFD_ASSERT (r_type == R_PPC_REL14);
9473
9474 if ((r_type == R_PPC_REL14_BRTAKEN
9475 || r_type == R_PPC_REL14_BRNTAKEN)
9476 && delta + 0x8000 < 0x10000
9477 && (bfd_signed_vma) delta < 0)
9478 insn ^= BRANCH_PREDICT_BIT;
9479 }
9480 if (delta + 0x8000 < 0x10000)
9481 {
9482 bfd_put_32 (input_bfd,
9483 (insn & ~0xfffc) | (delta & 0xfffc),
9484 contents + patch_off);
9485 patch_off += 4;
9486 bfd_put_32 (input_bfd,
9487 B | ((offset + 4 - patch_off) & 0x3fffffc),
9488 contents + patch_off);
9489 patch_off += 4;
9490 }
9491 else
9492 {
9493 if (rel != NULL)
9494 {
9495 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
9496
9497 relend[-1].r_offset += 8;
9498 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
9499 }
9500 bfd_put_32 (input_bfd,
9501 (insn & ~0xfffc) | 8,
9502 contents + patch_off);
9503 patch_off += 4;
9504 bfd_put_32 (input_bfd,
9505 B | ((offset + 4 - patch_off) & 0x3fffffc),
9506 contents + patch_off);
9507 patch_off += 4;
9508 bfd_put_32 (input_bfd,
9509 B | ((delta - 8) & 0x3fffffc),
9510 contents + patch_off);
9511 patch_off += 4;
9512 }
9513 }
9514 else
9515 {
9516 bfd_put_32 (input_bfd, insn, contents + patch_off);
9517 patch_off += 4;
9518 bfd_put_32 (input_bfd,
9519 B | ((offset + 4 - patch_off) & 0x3fffffc),
9520 contents + patch_off);
9521 patch_off += 4;
9522 }
9523 BFD_ASSERT (patch_off <= input_section->size);
9524 relax_info->workaround_size = input_section->size - patch_off;
9525 }
9526 }
9527
9528 return ret;
9529 }
9530 \f
9531 /* Finish up dynamic symbol handling. We set the contents of various
9532 dynamic sections here. */
9533
9534 static bfd_boolean
9535 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9536 struct bfd_link_info *info,
9537 struct elf_link_hash_entry *h,
9538 Elf_Internal_Sym *sym)
9539 {
9540 struct ppc_elf_link_hash_table *htab;
9541 struct plt_entry *ent;
9542 bfd_boolean doneone;
9543
9544 #ifdef DEBUG
9545 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9546 h->root.root.string);
9547 #endif
9548
9549 htab = ppc_elf_hash_table (info);
9550 BFD_ASSERT (htab->elf.dynobj != NULL);
9551
9552 doneone = FALSE;
9553 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9554 if (ent->plt.offset != (bfd_vma) -1)
9555 {
9556 if (!doneone)
9557 {
9558 Elf_Internal_Rela rela;
9559 bfd_byte *loc;
9560 bfd_vma reloc_index;
9561
9562 if (htab->plt_type == PLT_NEW
9563 || !htab->elf.dynamic_sections_created
9564 || h->dynindx == -1)
9565 reloc_index = ent->plt.offset / 4;
9566 else
9567 {
9568 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9569 / htab->plt_slot_size);
9570 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9571 && htab->plt_type == PLT_OLD)
9572 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9573 }
9574
9575 /* This symbol has an entry in the procedure linkage table.
9576 Set it up. */
9577 if (htab->plt_type == PLT_VXWORKS
9578 && htab->elf.dynamic_sections_created
9579 && h->dynindx != -1)
9580 {
9581 bfd_vma got_offset;
9582 const bfd_vma *plt_entry;
9583
9584 /* The first three entries in .got.plt are reserved. */
9585 got_offset = (reloc_index + 3) * 4;
9586
9587 /* Use the right PLT. */
9588 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9589 : ppc_elf_vxworks_plt_entry;
9590
9591 /* Fill in the .plt on VxWorks. */
9592 if (info->shared)
9593 {
9594 bfd_put_32 (output_bfd,
9595 plt_entry[0] | PPC_HA (got_offset),
9596 htab->plt->contents + ent->plt.offset + 0);
9597 bfd_put_32 (output_bfd,
9598 plt_entry[1] | PPC_LO (got_offset),
9599 htab->plt->contents + ent->plt.offset + 4);
9600 }
9601 else
9602 {
9603 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9604
9605 bfd_put_32 (output_bfd,
9606 plt_entry[0] | PPC_HA (got_loc),
9607 htab->plt->contents + ent->plt.offset + 0);
9608 bfd_put_32 (output_bfd,
9609 plt_entry[1] | PPC_LO (got_loc),
9610 htab->plt->contents + ent->plt.offset + 4);
9611 }
9612
9613 bfd_put_32 (output_bfd, plt_entry[2],
9614 htab->plt->contents + ent->plt.offset + 8);
9615 bfd_put_32 (output_bfd, plt_entry[3],
9616 htab->plt->contents + ent->plt.offset + 12);
9617
9618 /* This instruction is an immediate load. The value loaded is
9619 the byte offset of the R_PPC_JMP_SLOT relocation from the
9620 start of the .rela.plt section. The value is stored in the
9621 low-order 16 bits of the load instruction. */
9622 /* NOTE: It appears that this is now an index rather than a
9623 prescaled offset. */
9624 bfd_put_32 (output_bfd,
9625 plt_entry[4] | reloc_index,
9626 htab->plt->contents + ent->plt.offset + 16);
9627 /* This instruction is a PC-relative branch whose target is
9628 the start of the PLT section. The address of this branch
9629 instruction is 20 bytes beyond the start of this PLT entry.
9630 The address is encoded in bits 6-29, inclusive. The value
9631 stored is right-shifted by two bits, permitting a 26-bit
9632 offset. */
9633 bfd_put_32 (output_bfd,
9634 (plt_entry[5]
9635 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9636 htab->plt->contents + ent->plt.offset + 20);
9637 bfd_put_32 (output_bfd, plt_entry[6],
9638 htab->plt->contents + ent->plt.offset + 24);
9639 bfd_put_32 (output_bfd, plt_entry[7],
9640 htab->plt->contents + ent->plt.offset + 28);
9641
9642 /* Fill in the GOT entry corresponding to this PLT slot with
9643 the address immediately after the "bctr" instruction
9644 in this PLT entry. */
9645 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9646 + htab->plt->output_offset
9647 + ent->plt.offset + 16),
9648 htab->sgotplt->contents + got_offset);
9649
9650 if (!info->shared)
9651 {
9652 /* Fill in a couple of entries in .rela.plt.unloaded. */
9653 loc = htab->srelplt2->contents
9654 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9655 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9656 * sizeof (Elf32_External_Rela));
9657
9658 /* Provide the @ha relocation for the first instruction. */
9659 rela.r_offset = (htab->plt->output_section->vma
9660 + htab->plt->output_offset
9661 + ent->plt.offset + 2);
9662 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9663 R_PPC_ADDR16_HA);
9664 rela.r_addend = got_offset;
9665 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9666 loc += sizeof (Elf32_External_Rela);
9667
9668 /* Provide the @l relocation for the second instruction. */
9669 rela.r_offset = (htab->plt->output_section->vma
9670 + htab->plt->output_offset
9671 + ent->plt.offset + 6);
9672 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9673 R_PPC_ADDR16_LO);
9674 rela.r_addend = got_offset;
9675 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9676 loc += sizeof (Elf32_External_Rela);
9677
9678 /* Provide a relocation for the GOT entry corresponding to this
9679 PLT slot. Point it at the middle of the .plt entry. */
9680 rela.r_offset = (htab->sgotplt->output_section->vma
9681 + htab->sgotplt->output_offset
9682 + got_offset);
9683 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9684 R_PPC_ADDR32);
9685 rela.r_addend = ent->plt.offset + 16;
9686 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9687 }
9688
9689 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9690 In particular, the offset for the relocation is not the
9691 address of the PLT entry for this function, as specified
9692 by the ABI. Instead, the offset is set to the address of
9693 the GOT slot for this function. See EABI 4.4.4.1. */
9694 rela.r_offset = (htab->sgotplt->output_section->vma
9695 + htab->sgotplt->output_offset
9696 + got_offset);
9697
9698 }
9699 else
9700 {
9701 asection *splt = htab->plt;
9702 if (!htab->elf.dynamic_sections_created
9703 || h->dynindx == -1)
9704 splt = htab->iplt;
9705
9706 rela.r_offset = (splt->output_section->vma
9707 + splt->output_offset
9708 + ent->plt.offset);
9709 if (htab->plt_type == PLT_OLD
9710 || !htab->elf.dynamic_sections_created
9711 || h->dynindx == -1)
9712 {
9713 /* We don't need to fill in the .plt. The ppc dynamic
9714 linker will fill it in. */
9715 }
9716 else
9717 {
9718 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9719 + htab->glink->output_section->vma
9720 + htab->glink->output_offset);
9721 bfd_put_32 (output_bfd, val,
9722 splt->contents + ent->plt.offset);
9723 }
9724 }
9725
9726 /* Fill in the entry in the .rela.plt section. */
9727 rela.r_addend = 0;
9728 if (!htab->elf.dynamic_sections_created
9729 || h->dynindx == -1)
9730 {
9731 BFD_ASSERT (h->type == STT_GNU_IFUNC
9732 && h->def_regular
9733 && (h->root.type == bfd_link_hash_defined
9734 || h->root.type == bfd_link_hash_defweak));
9735 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9736 rela.r_addend = SYM_VAL (h);
9737 }
9738 else
9739 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9740
9741 if (!htab->elf.dynamic_sections_created
9742 || h->dynindx == -1)
9743 loc = (htab->reliplt->contents
9744 + (htab->reliplt->reloc_count++
9745 * sizeof (Elf32_External_Rela)));
9746 else
9747 loc = (htab->relplt->contents
9748 + reloc_index * sizeof (Elf32_External_Rela));
9749 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9750
9751 if (!h->def_regular)
9752 {
9753 /* Mark the symbol as undefined, rather than as
9754 defined in the .plt section. Leave the value if
9755 there were any relocations where pointer equality
9756 matters (this is a clue for the dynamic linker, to
9757 make function pointer comparisons work between an
9758 application and shared library), otherwise set it
9759 to zero. */
9760 sym->st_shndx = SHN_UNDEF;
9761 if (!h->pointer_equality_needed)
9762 sym->st_value = 0;
9763 else if (!h->ref_regular_nonweak)
9764 {
9765 /* This breaks function pointer comparisons, but
9766 that is better than breaking tests for a NULL
9767 function pointer. */
9768 sym->st_value = 0;
9769 }
9770 }
9771 else if (h->type == STT_GNU_IFUNC
9772 && !info->shared)
9773 {
9774 /* Set the value of ifunc symbols in a non-pie
9775 executable to the glink entry. This is to avoid
9776 text relocations. We can't do this for ifunc in
9777 allocate_dynrelocs, as we do for normal dynamic
9778 function symbols with plt entries, because we need
9779 to keep the original value around for the ifunc
9780 relocation. */
9781 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9782 (output_bfd, htab->glink->output_section));
9783 sym->st_value = (ent->glink_offset
9784 + htab->glink->output_offset
9785 + htab->glink->output_section->vma);
9786 }
9787 doneone = TRUE;
9788 }
9789
9790 if (htab->plt_type == PLT_NEW
9791 || !htab->elf.dynamic_sections_created
9792 || h->dynindx == -1)
9793 {
9794 unsigned char *p;
9795 asection *splt = htab->plt;
9796 if (!htab->elf.dynamic_sections_created
9797 || h->dynindx == -1)
9798 splt = htab->iplt;
9799
9800 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9801
9802 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9803 {
9804 bfd_put_32 (output_bfd, LWZ_11_3, p);
9805 p += 4;
9806 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9807 p += 4;
9808 bfd_put_32 (output_bfd, MR_0_3, p);
9809 p += 4;
9810 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9811 p += 4;
9812 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9813 p += 4;
9814 bfd_put_32 (output_bfd, BEQLR, p);
9815 p += 4;
9816 bfd_put_32 (output_bfd, MR_3_0, p);
9817 p += 4;
9818 bfd_put_32 (output_bfd, NOP, p);
9819 p += 4;
9820 }
9821
9822 write_glink_stub (ent, splt, p, info);
9823
9824 if (!info->shared)
9825 /* We only need one non-PIC glink stub. */
9826 break;
9827 }
9828 else
9829 break;
9830 }
9831
9832 if (h->needs_copy)
9833 {
9834 asection *s;
9835 Elf_Internal_Rela rela;
9836 bfd_byte *loc;
9837
9838 /* This symbols needs a copy reloc. Set it up. */
9839
9840 #ifdef DEBUG
9841 fprintf (stderr, ", copy");
9842 #endif
9843
9844 BFD_ASSERT (h->dynindx != -1);
9845
9846 if (ppc_elf_hash_entry (h)->has_sda_refs)
9847 s = htab->relsbss;
9848 else
9849 s = htab->relbss;
9850 BFD_ASSERT (s != NULL);
9851
9852 rela.r_offset = SYM_VAL (h);
9853 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9854 rela.r_addend = 0;
9855 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9856 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9857 }
9858
9859 #ifdef DEBUG
9860 fprintf (stderr, "\n");
9861 #endif
9862
9863 return TRUE;
9864 }
9865 \f
9866 static enum elf_reloc_type_class
9867 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9868 const asection *rel_sec,
9869 const Elf_Internal_Rela *rela)
9870 {
9871 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9872
9873 if (rel_sec == htab->reliplt)
9874 return reloc_class_ifunc;
9875
9876 switch (ELF32_R_TYPE (rela->r_info))
9877 {
9878 case R_PPC_RELATIVE:
9879 return reloc_class_relative;
9880 case R_PPC_JMP_SLOT:
9881 return reloc_class_plt;
9882 case R_PPC_COPY:
9883 return reloc_class_copy;
9884 default:
9885 return reloc_class_normal;
9886 }
9887 }
9888 \f
9889 /* Finish up the dynamic sections. */
9890
9891 static bfd_boolean
9892 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9893 struct bfd_link_info *info)
9894 {
9895 asection *sdyn;
9896 asection *splt;
9897 struct ppc_elf_link_hash_table *htab;
9898 bfd_vma got;
9899 bfd *dynobj;
9900 bfd_boolean ret = TRUE;
9901
9902 #ifdef DEBUG
9903 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9904 #endif
9905
9906 htab = ppc_elf_hash_table (info);
9907 dynobj = elf_hash_table (info)->dynobj;
9908 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9909 if (htab->is_vxworks)
9910 splt = bfd_get_linker_section (dynobj, ".plt");
9911 else
9912 splt = NULL;
9913
9914 got = 0;
9915 if (htab->elf.hgot != NULL)
9916 got = SYM_VAL (htab->elf.hgot);
9917
9918 if (htab->elf.dynamic_sections_created)
9919 {
9920 Elf32_External_Dyn *dyncon, *dynconend;
9921
9922 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9923
9924 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9925 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9926 for (; dyncon < dynconend; dyncon++)
9927 {
9928 Elf_Internal_Dyn dyn;
9929 asection *s;
9930
9931 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9932
9933 switch (dyn.d_tag)
9934 {
9935 case DT_PLTGOT:
9936 if (htab->is_vxworks)
9937 s = htab->sgotplt;
9938 else
9939 s = htab->plt;
9940 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9941 break;
9942
9943 case DT_PLTRELSZ:
9944 dyn.d_un.d_val = htab->relplt->size;
9945 break;
9946
9947 case DT_JMPREL:
9948 s = htab->relplt;
9949 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9950 break;
9951
9952 case DT_PPC_GOT:
9953 dyn.d_un.d_ptr = got;
9954 break;
9955
9956 case DT_RELASZ:
9957 if (htab->is_vxworks)
9958 {
9959 if (htab->relplt)
9960 dyn.d_un.d_ptr -= htab->relplt->size;
9961 break;
9962 }
9963 continue;
9964
9965 default:
9966 if (htab->is_vxworks
9967 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9968 break;
9969 continue;
9970 }
9971
9972 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9973 }
9974 }
9975
9976 if (htab->got != NULL)
9977 {
9978 if (htab->elf.hgot->root.u.def.section == htab->got
9979 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9980 {
9981 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9982
9983 p += htab->elf.hgot->root.u.def.value;
9984 if (htab->plt_type == PLT_OLD)
9985 {
9986 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9987 so that a function can easily find the address of
9988 _GLOBAL_OFFSET_TABLE_. */
9989 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9990 < htab->elf.hgot->root.u.def.section->size);
9991 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9992 }
9993
9994 if (sdyn != NULL)
9995 {
9996 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9997 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9998 < htab->elf.hgot->root.u.def.section->size);
9999 bfd_put_32 (output_bfd, val, p);
10000 }
10001 }
10002 else
10003 {
10004 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10005 htab->elf.hgot->root.root.string,
10006 (htab->sgotplt != NULL
10007 ? htab->sgotplt->name : htab->got->name));
10008 bfd_set_error (bfd_error_bad_value);
10009 ret = FALSE;
10010 }
10011
10012 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
10013 }
10014
10015 /* Fill in the first entry in the VxWorks procedure linkage table. */
10016 if (splt && splt->size > 0)
10017 {
10018 /* Use the right PLT. */
10019 const bfd_vma *plt_entry = (info->shared
10020 ? ppc_elf_vxworks_pic_plt0_entry
10021 : ppc_elf_vxworks_plt0_entry);
10022
10023 if (!info->shared)
10024 {
10025 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10026
10027 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10028 splt->contents + 0);
10029 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10030 splt->contents + 4);
10031 }
10032 else
10033 {
10034 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10035 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10036 }
10037 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10038 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10039 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10040 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10041 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10042 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10043
10044 if (! info->shared)
10045 {
10046 Elf_Internal_Rela rela;
10047 bfd_byte *loc;
10048
10049 loc = htab->srelplt2->contents;
10050
10051 /* Output the @ha relocation for the first instruction. */
10052 rela.r_offset = (htab->plt->output_section->vma
10053 + htab->plt->output_offset
10054 + 2);
10055 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10056 rela.r_addend = 0;
10057 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10058 loc += sizeof (Elf32_External_Rela);
10059
10060 /* Output the @l relocation for the second instruction. */
10061 rela.r_offset = (htab->plt->output_section->vma
10062 + htab->plt->output_offset
10063 + 6);
10064 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10065 rela.r_addend = 0;
10066 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10067 loc += sizeof (Elf32_External_Rela);
10068
10069 /* Fix up the remaining relocations. They may have the wrong
10070 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10071 in which symbols were output. */
10072 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10073 {
10074 Elf_Internal_Rela rel;
10075
10076 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10077 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10078 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10079 loc += sizeof (Elf32_External_Rela);
10080
10081 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10082 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10083 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10084 loc += sizeof (Elf32_External_Rela);
10085
10086 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10087 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10088 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10089 loc += sizeof (Elf32_External_Rela);
10090 }
10091 }
10092 }
10093
10094 if (htab->glink != NULL
10095 && htab->glink->contents != NULL
10096 && htab->elf.dynamic_sections_created)
10097 {
10098 unsigned char *p;
10099 unsigned char *endp;
10100 bfd_vma res0;
10101 unsigned int i;
10102
10103 /*
10104 * PIC glink code is the following:
10105 *
10106 * # ith PLT code stub.
10107 * addis 11,30,(plt+(i-1)*4-got)@ha
10108 * lwz 11,(plt+(i-1)*4-got)@l(11)
10109 * mtctr 11
10110 * bctr
10111 *
10112 * # A table of branches, one for each plt entry.
10113 * # The idea is that the plt call stub loads ctr and r11 with these
10114 * # addresses, so (r11 - res_0) gives the plt index * 4.
10115 * res_0: b PLTresolve
10116 * res_1: b PLTresolve
10117 * .
10118 * # Some number of entries towards the end can be nops
10119 * res_n_m3: nop
10120 * res_n_m2: nop
10121 * res_n_m1:
10122 *
10123 * PLTresolve:
10124 * addis 11,11,(1f-res_0)@ha
10125 * mflr 0
10126 * bcl 20,31,1f
10127 * 1: addi 11,11,(1b-res_0)@l
10128 * mflr 12
10129 * mtlr 0
10130 * sub 11,11,12 # r11 = index * 4
10131 * addis 12,12,(got+4-1b)@ha
10132 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10133 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10134 * mtctr 0
10135 * add 0,11,11
10136 * add 11,0,11 # r11 = index * 12 = reloc offset.
10137 * bctr
10138 */
10139 static const unsigned int pic_plt_resolve[] =
10140 {
10141 ADDIS_11_11,
10142 MFLR_0,
10143 BCL_20_31,
10144 ADDI_11_11,
10145 MFLR_12,
10146 MTLR_0,
10147 SUB_11_11_12,
10148 ADDIS_12_12,
10149 LWZ_0_12,
10150 LWZ_12_12,
10151 MTCTR_0,
10152 ADD_0_11_11,
10153 ADD_11_0_11,
10154 BCTR,
10155 NOP,
10156 NOP
10157 };
10158
10159 /*
10160 * Non-PIC glink code is a little simpler.
10161 *
10162 * # ith PLT code stub.
10163 * lis 11,(plt+(i-1)*4)@ha
10164 * lwz 11,(plt+(i-1)*4)@l(11)
10165 * mtctr 11
10166 * bctr
10167 *
10168 * The branch table is the same, then comes
10169 *
10170 * PLTresolve:
10171 * lis 12,(got+4)@ha
10172 * addis 11,11,(-res_0)@ha
10173 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10174 * addi 11,11,(-res_0)@l # r11 = index * 4
10175 * mtctr 0
10176 * add 0,11,11
10177 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10178 * add 11,0,11 # r11 = index * 12 = reloc offset.
10179 * bctr
10180 */
10181 static const unsigned int plt_resolve[] =
10182 {
10183 LIS_12,
10184 ADDIS_11_11,
10185 LWZ_0_12,
10186 ADDI_11_11,
10187 MTCTR_0,
10188 ADD_0_11_11,
10189 LWZ_12_12,
10190 ADD_11_0_11,
10191 BCTR,
10192 NOP,
10193 NOP,
10194 NOP,
10195 NOP,
10196 NOP,
10197 NOP,
10198 NOP
10199 };
10200
10201 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10202 abort ();
10203 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10204 abort ();
10205
10206 /* Build the branch table, one for each plt entry (less one),
10207 and perhaps some padding. */
10208 p = htab->glink->contents;
10209 p += htab->glink_pltresolve;
10210 endp = htab->glink->contents;
10211 endp += htab->glink->size - GLINK_PLTRESOLVE;
10212 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10213 {
10214 bfd_put_32 (output_bfd, B + endp - p, p);
10215 p += 4;
10216 }
10217 while (p < endp)
10218 {
10219 bfd_put_32 (output_bfd, NOP, p);
10220 p += 4;
10221 }
10222
10223 res0 = (htab->glink_pltresolve
10224 + htab->glink->output_section->vma
10225 + htab->glink->output_offset);
10226
10227 if (htab->params->ppc476_workaround)
10228 {
10229 /* Ensure that a call stub at the end of a page doesn't
10230 result in prefetch over the end of the page into the
10231 glink branch table. */
10232 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10233 bfd_vma page_addr;
10234 bfd_vma glink_start = (htab->glink->output_section->vma
10235 + htab->glink->output_offset);
10236
10237 for (page_addr = res0 & -pagesize;
10238 page_addr > glink_start;
10239 page_addr -= pagesize)
10240 {
10241 /* We have a plt call stub that may need fixing. */
10242 bfd_byte *loc;
10243 unsigned int insn;
10244
10245 loc = htab->glink->contents + page_addr - 4 - glink_start;
10246 insn = bfd_get_32 (output_bfd, loc);
10247 if (insn == BCTR)
10248 {
10249 /* By alignment, we know that there must be at least
10250 one other call stub before this one. */
10251 insn = bfd_get_32 (output_bfd, loc - 16);
10252 if (insn == BCTR)
10253 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10254 else
10255 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10256 }
10257 }
10258 }
10259
10260 /* Last comes the PLTresolve stub. */
10261 if (info->shared)
10262 {
10263 bfd_vma bcl;
10264
10265 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10266 {
10267 unsigned int insn = pic_plt_resolve[i];
10268
10269 if (htab->params->ppc476_workaround && insn == NOP)
10270 insn = BA + 0;
10271 bfd_put_32 (output_bfd, insn, p);
10272 p += 4;
10273 }
10274 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10275
10276 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10277 + htab->glink->output_section->vma
10278 + htab->glink->output_offset);
10279
10280 bfd_put_32 (output_bfd,
10281 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10282 bfd_put_32 (output_bfd,
10283 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10284 bfd_put_32 (output_bfd,
10285 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10286 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10287 {
10288 bfd_put_32 (output_bfd,
10289 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10290 bfd_put_32 (output_bfd,
10291 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10292 }
10293 else
10294 {
10295 bfd_put_32 (output_bfd,
10296 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10297 bfd_put_32 (output_bfd,
10298 LWZ_12_12 + 4, p + 9*4);
10299 }
10300 }
10301 else
10302 {
10303 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10304 {
10305 unsigned int insn = plt_resolve[i];
10306
10307 if (htab->params->ppc476_workaround && insn == NOP)
10308 insn = BA + 0;
10309 bfd_put_32 (output_bfd, insn, p);
10310 p += 4;
10311 }
10312 p -= 4 * ARRAY_SIZE (plt_resolve);
10313
10314 bfd_put_32 (output_bfd,
10315 LIS_12 + PPC_HA (got + 4), p + 0*4);
10316 bfd_put_32 (output_bfd,
10317 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10318 bfd_put_32 (output_bfd,
10319 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10320 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10321 {
10322 bfd_put_32 (output_bfd,
10323 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10324 bfd_put_32 (output_bfd,
10325 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10326 }
10327 else
10328 {
10329 bfd_put_32 (output_bfd,
10330 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10331 bfd_put_32 (output_bfd,
10332 LWZ_12_12 + 4, p + 6*4);
10333 }
10334 }
10335 }
10336
10337 if (htab->glink_eh_frame != NULL
10338 && htab->glink_eh_frame->contents != NULL)
10339 {
10340 unsigned char *p = htab->glink_eh_frame->contents;
10341 bfd_vma val;
10342
10343 p += sizeof (glink_eh_frame_cie);
10344 /* FDE length. */
10345 p += 4;
10346 /* CIE pointer. */
10347 p += 4;
10348 /* Offset to .glink. */
10349 val = (htab->glink->output_section->vma
10350 + htab->glink->output_offset);
10351 val -= (htab->glink_eh_frame->output_section->vma
10352 + htab->glink_eh_frame->output_offset);
10353 val -= p - htab->glink_eh_frame->contents;
10354 bfd_put_32 (htab->elf.dynobj, val, p);
10355
10356 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10357 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10358 htab->glink_eh_frame,
10359 htab->glink_eh_frame->contents))
10360 return FALSE;
10361 }
10362
10363 return ret;
10364 }
10365 \f
10366 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10367 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10368 #define TARGET_BIG_SYM powerpc_elf32_vec
10369 #define TARGET_BIG_NAME "elf32-powerpc"
10370 #define ELF_ARCH bfd_arch_powerpc
10371 #define ELF_TARGET_ID PPC32_ELF_DATA
10372 #define ELF_MACHINE_CODE EM_PPC
10373 #ifdef __QNXTARGET__
10374 #define ELF_MAXPAGESIZE 0x1000
10375 #define ELF_COMMONPAGESIZE 0x1000
10376 #else
10377 #define ELF_MAXPAGESIZE 0x10000
10378 #define ELF_COMMONPAGESIZE 0x10000
10379 #endif
10380 #define ELF_MINPAGESIZE 0x1000
10381 #define elf_info_to_howto ppc_elf_info_to_howto
10382
10383 #ifdef EM_CYGNUS_POWERPC
10384 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10385 #endif
10386
10387 #ifdef EM_PPC_OLD
10388 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10389 #endif
10390
10391 #define elf_backend_plt_not_loaded 1
10392 #define elf_backend_can_gc_sections 1
10393 #define elf_backend_can_refcount 1
10394 #define elf_backend_rela_normal 1
10395 #define elf_backend_caches_rawsize 1
10396
10397 #define bfd_elf32_mkobject ppc_elf_mkobject
10398 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10399 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10400 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10401 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10402 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10403 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10404 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10405
10406 #define elf_backend_object_p ppc_elf_object_p
10407 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10408 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10409 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10410 #define elf_backend_relocate_section ppc_elf_relocate_section
10411 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10412 #define elf_backend_check_relocs ppc_elf_check_relocs
10413 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10414 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10415 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10416 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10417 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10418 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10419 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10420 #define elf_backend_fake_sections ppc_elf_fake_sections
10421 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10422 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10423 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10424 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10425 #define elf_backend_write_core_note ppc_elf_write_core_note
10426 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10427 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10428 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10429 #define elf_backend_write_section ppc_elf_write_section
10430 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10431 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10432 #define elf_backend_action_discarded ppc_elf_action_discarded
10433 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10434 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10435 #define elf_backend_section_processing ppc_elf_section_processing
10436
10437 #include "elf32-target.h"
10438
10439 /* FreeBSD Target */
10440
10441 #undef TARGET_LITTLE_SYM
10442 #undef TARGET_LITTLE_NAME
10443
10444 #undef TARGET_BIG_SYM
10445 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
10446 #undef TARGET_BIG_NAME
10447 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10448
10449 #undef ELF_OSABI
10450 #define ELF_OSABI ELFOSABI_FREEBSD
10451
10452 #undef elf32_bed
10453 #define elf32_bed elf32_powerpc_fbsd_bed
10454
10455 #include "elf32-target.h"
10456
10457 /* VxWorks Target */
10458
10459 #undef TARGET_LITTLE_SYM
10460 #undef TARGET_LITTLE_NAME
10461
10462 #undef TARGET_BIG_SYM
10463 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
10464 #undef TARGET_BIG_NAME
10465 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10466
10467 #undef ELF_OSABI
10468
10469 /* VxWorks uses the elf default section flags for .plt. */
10470 static const struct bfd_elf_special_section *
10471 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10472 {
10473 if (sec->name == NULL)
10474 return NULL;
10475
10476 if (strcmp (sec->name, ".plt") == 0)
10477 return _bfd_elf_get_sec_type_attr (abfd, sec);
10478
10479 return ppc_elf_get_sec_type_attr (abfd, sec);
10480 }
10481
10482 /* Like ppc_elf_link_hash_table_create, but overrides
10483 appropriately for VxWorks. */
10484 static struct bfd_link_hash_table *
10485 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10486 {
10487 struct bfd_link_hash_table *ret;
10488
10489 ret = ppc_elf_link_hash_table_create (abfd);
10490 if (ret)
10491 {
10492 struct ppc_elf_link_hash_table *htab
10493 = (struct ppc_elf_link_hash_table *)ret;
10494 htab->is_vxworks = 1;
10495 htab->plt_type = PLT_VXWORKS;
10496 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10497 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10498 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10499 }
10500 return ret;
10501 }
10502
10503 /* Tweak magic VxWorks symbols as they are loaded. */
10504 static bfd_boolean
10505 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10506 struct bfd_link_info *info,
10507 Elf_Internal_Sym *sym,
10508 const char **namep ATTRIBUTE_UNUSED,
10509 flagword *flagsp ATTRIBUTE_UNUSED,
10510 asection **secp,
10511 bfd_vma *valp)
10512 {
10513 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10514 valp))
10515 return FALSE;
10516
10517 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10518 }
10519
10520 static void
10521 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10522 {
10523 ppc_elf_final_write_processing(abfd, linker);
10524 elf_vxworks_final_write_processing(abfd, linker);
10525 }
10526
10527 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10528 define it. */
10529 #undef elf_backend_want_plt_sym
10530 #define elf_backend_want_plt_sym 1
10531 #undef elf_backend_want_got_plt
10532 #define elf_backend_want_got_plt 1
10533 #undef elf_backend_got_symbol_offset
10534 #define elf_backend_got_symbol_offset 0
10535 #undef elf_backend_plt_not_loaded
10536 #define elf_backend_plt_not_loaded 0
10537 #undef elf_backend_plt_readonly
10538 #define elf_backend_plt_readonly 1
10539 #undef elf_backend_got_header_size
10540 #define elf_backend_got_header_size 12
10541
10542 #undef bfd_elf32_get_synthetic_symtab
10543
10544 #undef bfd_elf32_bfd_link_hash_table_create
10545 #define bfd_elf32_bfd_link_hash_table_create \
10546 ppc_elf_vxworks_link_hash_table_create
10547 #undef elf_backend_add_symbol_hook
10548 #define elf_backend_add_symbol_hook \
10549 ppc_elf_vxworks_add_symbol_hook
10550 #undef elf_backend_link_output_symbol_hook
10551 #define elf_backend_link_output_symbol_hook \
10552 elf_vxworks_link_output_symbol_hook
10553 #undef elf_backend_final_write_processing
10554 #define elf_backend_final_write_processing \
10555 ppc_elf_vxworks_final_write_processing
10556 #undef elf_backend_get_sec_type_attr
10557 #define elf_backend_get_sec_type_attr \
10558 ppc_elf_vxworks_get_sec_type_attr
10559 #undef elf_backend_emit_relocs
10560 #define elf_backend_emit_relocs \
10561 elf_vxworks_emit_relocs
10562
10563 #undef elf32_bed
10564 #define elf32_bed ppc_elf_vxworks_bed
10565 #undef elf_backend_post_process_headers
10566
10567 #include "elf32-target.h"
GDB Binutils - Deliverables
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