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* elf-bfd.h (struct sym_sec_cache): Delete.
[thirdparty/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24 /* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc.h"
36 #include "elf32-ppc.h"
37 #include "elf-vxworks.h"
38
39 /* RELA relocations are used here. */
40
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
46 /* Branch prediction bit for branch taken relocs. */
47 #define BRANCH_PREDICT_BIT 0x200000
48 /* Mask to set RA in memory instructions. */
49 #define RA_REGISTER_MASK 0x001f0000
50 /* Value to shift register by to insert RA. */
51 #define RA_REGISTER_SHIFT 16
52
53 /* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
57 /* For old-style PLT. */
58 /* The number of single-slot PLT entries (the rest use two slots). */
59 #define PLT_NUM_SINGLE_ENTRIES 8192
60
61 /* For new-style .glink and .plt. */
62 #define GLINK_PLTRESOLVE 16*4
63 #define GLINK_ENTRY_SIZE 4*4
64
65 /* VxWorks uses its own plt layout, filled in by the static linker. */
66
67 /* The standard VxWorks PLT entry. */
68 #define VXWORKS_PLT_ENTRY_SIZE 32
69 static const bfd_vma ppc_elf_vxworks_plt_entry
70 [VXWORKS_PLT_ENTRY_SIZE / 4] =
71 {
72 0x3d800000, /* lis r12,0 */
73 0x818c0000, /* lwz r12,0(r12) */
74 0x7d8903a6, /* mtctr r12 */
75 0x4e800420, /* bctr */
76 0x39600000, /* li r11,0 */
77 0x48000000, /* b 14 <.PLT0resolve+0x4> */
78 0x60000000, /* nop */
79 0x60000000, /* nop */
80 };
81 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
82 [VXWORKS_PLT_ENTRY_SIZE / 4] =
83 {
84 0x3d9e0000, /* addis r12,r30,0 */
85 0x818c0000, /* lwz r12,0(r12) */
86 0x7d8903a6, /* mtctr r12 */
87 0x4e800420, /* bctr */
88 0x39600000, /* li r11,0 */
89 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
90 0x60000000, /* nop */
91 0x60000000, /* nop */
92 };
93
94 /* The initial VxWorks PLT entry. */
95 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
96 static const bfd_vma ppc_elf_vxworks_plt0_entry
97 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
98 {
99 0x3d800000, /* lis r12,0 */
100 0x398c0000, /* addi r12,r12,0 */
101 0x800c0008, /* lwz r0,8(r12) */
102 0x7c0903a6, /* mtctr r0 */
103 0x818c0004, /* lwz r12,4(r12) */
104 0x4e800420, /* bctr */
105 0x60000000, /* nop */
106 0x60000000, /* nop */
107 };
108 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
109 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
110 {
111 0x819e0008, /* lwz r12,8(r30) */
112 0x7d8903a6, /* mtctr r12 */
113 0x819e0004, /* lwz r12,4(r30) */
114 0x4e800420, /* bctr */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 };
120
121 /* For executables, we have some additional relocations in
122 .rela.plt.unloaded, for the kernel loader. */
123
124 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
125 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
126 /* The number of relocations in the PLTResolve slot. */
127 #define VXWORKS_PLTRESOLVE_RELOCS 2
128 /* The number of relocations in the PLTResolve slot when when creating
129 a shared library. */
130 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
131
132 /* Some instructions. */
133 #define ADDIS_11_11 0x3d6b0000
134 #define ADDIS_11_30 0x3d7e0000
135 #define ADDIS_12_12 0x3d8c0000
136 #define ADDI_11_11 0x396b0000
137 #define ADD_0_11_11 0x7c0b5a14
138 #define ADD_11_0_11 0x7d605a14
139 #define B 0x48000000
140 #define BCL_20_31 0x429f0005
141 #define BCTR 0x4e800420
142 #define LIS_11 0x3d600000
143 #define LIS_12 0x3d800000
144 #define LWZU_0_12 0x840c0000
145 #define LWZ_0_12 0x800c0000
146 #define LWZ_11_11 0x816b0000
147 #define LWZ_11_30 0x817e0000
148 #define LWZ_12_12 0x818c0000
149 #define MFLR_0 0x7c0802a6
150 #define MFLR_12 0x7d8802a6
151 #define MTCTR_0 0x7c0903a6
152 #define MTCTR_11 0x7d6903a6
153 #define MTLR_0 0x7c0803a6
154 #define NOP 0x60000000
155 #define SUB_11_11_12 0x7d6c5850
156
157 /* Offset of tp and dtp pointers from start of TLS block. */
158 #define TP_OFFSET 0x7000
159 #define DTP_OFFSET 0x8000
160
161 /* The value of a defined global symbol. */
162 #define SYM_VAL(SYM) \
163 ((SYM)->root.u.def.section->output_section->vma \
164 + (SYM)->root.u.def.section->output_offset \
165 + (SYM)->root.u.def.value)
166 \f
167 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
168
169 static reloc_howto_type ppc_elf_howto_raw[] = {
170 /* This reloc does nothing. */
171 HOWTO (R_PPC_NONE, /* type */
172 0, /* rightshift */
173 2, /* size (0 = byte, 1 = short, 2 = long) */
174 32, /* bitsize */
175 FALSE, /* pc_relative */
176 0, /* bitpos */
177 complain_overflow_bitfield, /* complain_on_overflow */
178 bfd_elf_generic_reloc, /* special_function */
179 "R_PPC_NONE", /* name */
180 FALSE, /* partial_inplace */
181 0, /* src_mask */
182 0, /* dst_mask */
183 FALSE), /* pcrel_offset */
184
185 /* A standard 32 bit relocation. */
186 HOWTO (R_PPC_ADDR32, /* type */
187 0, /* rightshift */
188 2, /* size (0 = byte, 1 = short, 2 = long) */
189 32, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_bitfield, /* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_PPC_ADDR32", /* name */
195 FALSE, /* partial_inplace */
196 0, /* src_mask */
197 0xffffffff, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 /* An absolute 26 bit branch; the lower two bits must be zero.
201 FIXME: we don't check that, we just clear them. */
202 HOWTO (R_PPC_ADDR24, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 26, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_bitfield, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC_ADDR24", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0x3fffffc, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* A standard 16 bit relocation. */
217 HOWTO (R_PPC_ADDR16, /* type */
218 0, /* rightshift */
219 1, /* size (0 = byte, 1 = short, 2 = long) */
220 16, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_bitfield, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC_ADDR16", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0xffff, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A 16 bit relocation without overflow. */
232 HOWTO (R_PPC_ADDR16_LO, /* type */
233 0, /* rightshift */
234 1, /* size (0 = byte, 1 = short, 2 = long) */
235 16, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_dont,/* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC_ADDR16_LO", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* The high order 16 bits of an address. */
247 HOWTO (R_PPC_ADDR16_HI, /* type */
248 16, /* rightshift */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
250 16, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_PPC_ADDR16_HI", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* The high order 16 bits of an address, plus 1 if the contents of
262 the low 16 bits, treated as a signed number, is negative. */
263 HOWTO (R_PPC_ADDR16_HA, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 ppc_elf_addr16_ha_reloc, /* special_function */
271 "R_PPC_ADDR16_HA", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* An absolute 16 bit branch; the lower two bits must be zero.
278 FIXME: we don't check that, we just clear them. */
279 HOWTO (R_PPC_ADDR14, /* type */
280 0, /* rightshift */
281 2, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_bitfield, /* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_PPC_ADDR14", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xfffc, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch, for which bit 10 should be set to
294 indicate that the branch is expected to be taken. The lower two
295 bits must be zero. */
296 HOWTO (R_PPC_ADDR14_BRTAKEN, /* 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_bitfield, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14_BRTAKEN",/* 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 not expected to be taken. The lower
312 two bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* 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_bitfield, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRNTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* A relative 26 bit branch; the lower two bits must be zero. */
328 HOWTO (R_PPC_REL24, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 26, /* bitsize */
332 TRUE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_signed, /* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 "R_PPC_REL24", /* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x3fffffc, /* dst_mask */
340 TRUE), /* pcrel_offset */
341
342 /* A relative 16 bit branch; the lower two bits must be zero. */
343 HOWTO (R_PPC_REL14, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 16, /* bitsize */
347 TRUE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_signed, /* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_PPC_REL14", /* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0xfffc, /* dst_mask */
355 TRUE), /* pcrel_offset */
356
357 /* A relative 16 bit branch. Bit 10 should be set to indicate that
358 the branch is expected to be taken. The lower two bits must be
359 zero. */
360 HOWTO (R_PPC_REL14_BRTAKEN, /* 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_BRTAKEN", /* 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 not expected to be taken. The lower two bits must
376 be zero. */
377 HOWTO (R_PPC_REL14_BRNTAKEN, /* 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_BRNTAKEN",/* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
392 symbol. */
393 HOWTO (R_PPC_GOT16, /* type */
394 0, /* rightshift */
395 1, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 FALSE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_PPC_GOT16", /* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0xffff, /* dst_mask */
405 FALSE), /* pcrel_offset */
406
407 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
408 the symbol. */
409 HOWTO (R_PPC_GOT16_LO, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_dont, /* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_PPC_GOT16_LO", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC_GOT16_HI, /* type */
426 16, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_bitfield, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 "R_PPC_GOT16_HI", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC_GOT16_HA, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_bitfield, /* complain_on_overflow */
448 ppc_elf_addr16_ha_reloc, /* special_function */
449 "R_PPC_GOT16_HA", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC_REL24, but referring to the procedure linkage table
456 entry for the symbol. */
457 HOWTO (R_PPC_PLTREL24, /* type */
458 0, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 26, /* bitsize */
461 TRUE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_signed, /* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_PPC_PLTREL24", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0x3fffffc, /* dst_mask */
469 TRUE), /* pcrel_offset */
470
471 /* This is used only by the dynamic linker. The symbol should exist
472 both in the object being run and in some shared library. The
473 dynamic linker copies the data addressed by the symbol from the
474 shared library into the object, because the object being
475 run has to have the data at some particular address. */
476 HOWTO (R_PPC_COPY, /* type */
477 0, /* rightshift */
478 2, /* size (0 = byte, 1 = short, 2 = long) */
479 32, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_bitfield, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_COPY", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC_ADDR32, but used when setting global offset table
491 entries. */
492 HOWTO (R_PPC_GLOB_DAT, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_bitfield, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_PPC_GLOB_DAT", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffffffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Marks a procedure linkage table entry for a symbol. */
507 HOWTO (R_PPC_JMP_SLOT, /* type */
508 0, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 32, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_bitfield, /* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_PPC_JMP_SLOT", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Used only by the dynamic linker. When the object is run, this
522 longword is set to the load address of the object, plus the
523 addend. */
524 HOWTO (R_PPC_RELATIVE, /* 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_bitfield, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_RELATIVE", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0xffffffff, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Like R_PPC_REL24, but uses the value of the symbol within the
539 object rather than the final value. Normally used for
540 _GLOBAL_OFFSET_TABLE_. */
541 HOWTO (R_PPC_LOCAL24PC, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 26, /* bitsize */
545 TRUE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_signed, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_LOCAL24PC", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0x3fffffc, /* dst_mask */
553 TRUE), /* pcrel_offset */
554
555 /* Like R_PPC_ADDR32, but may be unaligned. */
556 HOWTO (R_PPC_UADDR32, /* type */
557 0, /* rightshift */
558 2, /* size (0 = byte, 1 = short, 2 = long) */
559 32, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_bitfield, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC_UADDR32", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 0xffffffff, /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* Like R_PPC_ADDR16, but may be unaligned. */
571 HOWTO (R_PPC_UADDR16, /* type */
572 0, /* rightshift */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
574 16, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC_UADDR16", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* 32-bit PC relative */
586 HOWTO (R_PPC_REL32, /* type */
587 0, /* rightshift */
588 2, /* size (0 = byte, 1 = short, 2 = long) */
589 32, /* bitsize */
590 TRUE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC_REL32", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffffffff, /* dst_mask */
598 TRUE), /* pcrel_offset */
599
600 /* 32-bit relocation to the symbol's procedure linkage table.
601 FIXME: not supported. */
602 HOWTO (R_PPC_PLT32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 FALSE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_bitfield, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_PLT32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0, /* dst_mask */
614 FALSE), /* pcrel_offset */
615
616 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
617 FIXME: not supported. */
618 HOWTO (R_PPC_PLTREL32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 TRUE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 bfd_elf_generic_reloc, /* special_function */
626 "R_PPC_PLTREL32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 TRUE), /* pcrel_offset */
631
632 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
633 the symbol. */
634 HOWTO (R_PPC_PLT16_LO, /* type */
635 0, /* rightshift */
636 1, /* size (0 = byte, 1 = short, 2 = long) */
637 16, /* bitsize */
638 FALSE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC_PLT16_LO", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffff, /* dst_mask */
646 FALSE), /* pcrel_offset */
647
648 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC_PLT16_HI, /* type */
651 16, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_bitfield, /* complain_on_overflow */
657 bfd_elf_generic_reloc, /* special_function */
658 "R_PPC_PLT16_HI", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC_PLT16_HA, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_bitfield, /* complain_on_overflow */
673 ppc_elf_addr16_ha_reloc, /* special_function */
674 "R_PPC_PLT16_HA", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
681 small data items. */
682 HOWTO (R_PPC_SDAREL16, /* type */
683 0, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_signed, /* complain_on_overflow */
689 bfd_elf_generic_reloc, /* special_function */
690 "R_PPC_SDAREL16", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 bfd_elf_generic_reloc, /* special_function */
705 "R_PPC_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* 16-bit lower half section relative relocation. */
712 HOWTO (R_PPC_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 bfd_elf_generic_reloc, /* special_function */
720 "R_PPC_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_bitfield, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_PPC_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_bitfield, /* complain_on_overflow */
749 ppc_elf_addr16_ha_reloc, /* special_function */
750 "R_PPC_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Marker relocs for TLS. */
757 HOWTO (R_PPC_TLS,
758 0, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 32, /* bitsize */
761 FALSE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC_TLS", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0, /* dst_mask */
769 FALSE), /* pcrel_offset */
770
771 HOWTO (R_PPC_TLSGD,
772 0, /* rightshift */
773 2, /* size (0 = byte, 1 = short, 2 = long) */
774 32, /* bitsize */
775 FALSE, /* pc_relative */
776 0, /* bitpos */
777 complain_overflow_dont, /* complain_on_overflow */
778 bfd_elf_generic_reloc, /* special_function */
779 "R_PPC_TLSGD", /* name */
780 FALSE, /* partial_inplace */
781 0, /* src_mask */
782 0, /* dst_mask */
783 FALSE), /* pcrel_offset */
784
785 HOWTO (R_PPC_TLSLD,
786 0, /* rightshift */
787 2, /* size (0 = byte, 1 = short, 2 = long) */
788 32, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC_TLSLD", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 0, /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* Computes the load module index of the load module that contains the
800 definition of its TLS sym. */
801 HOWTO (R_PPC_DTPMOD32,
802 0, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 32, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 ppc_elf_unhandled_reloc, /* special_function */
809 "R_PPC_DTPMOD32", /* name */
810 FALSE, /* partial_inplace */
811 0, /* src_mask */
812 0xffffffff, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* Computes a dtv-relative displacement, the difference between the value
816 of sym+add and the base address of the thread-local storage block that
817 contains the definition of sym, minus 0x8000. */
818 HOWTO (R_PPC_DTPREL32,
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_DTPREL32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* A 16 bit dtprel reloc. */
833 HOWTO (R_PPC_DTPREL16,
834 0, /* rightshift */
835 1, /* size (0 = byte, 1 = short, 2 = long) */
836 16, /* bitsize */
837 FALSE, /* pc_relative */
838 0, /* bitpos */
839 complain_overflow_signed, /* complain_on_overflow */
840 ppc_elf_unhandled_reloc, /* special_function */
841 "R_PPC_DTPREL16", /* name */
842 FALSE, /* partial_inplace */
843 0, /* src_mask */
844 0xffff, /* dst_mask */
845 FALSE), /* pcrel_offset */
846
847 /* Like DTPREL16, but no overflow. */
848 HOWTO (R_PPC_DTPREL16_LO,
849 0, /* rightshift */
850 1, /* size (0 = byte, 1 = short, 2 = long) */
851 16, /* bitsize */
852 FALSE, /* pc_relative */
853 0, /* bitpos */
854 complain_overflow_dont, /* complain_on_overflow */
855 ppc_elf_unhandled_reloc, /* special_function */
856 "R_PPC_DTPREL16_LO", /* name */
857 FALSE, /* partial_inplace */
858 0, /* src_mask */
859 0xffff, /* dst_mask */
860 FALSE), /* pcrel_offset */
861
862 /* Like DTPREL16_LO, but next higher group of 16 bits. */
863 HOWTO (R_PPC_DTPREL16_HI,
864 16, /* rightshift */
865 1, /* size (0 = byte, 1 = short, 2 = long) */
866 16, /* bitsize */
867 FALSE, /* pc_relative */
868 0, /* bitpos */
869 complain_overflow_dont, /* complain_on_overflow */
870 ppc_elf_unhandled_reloc, /* special_function */
871 "R_PPC_DTPREL16_HI", /* name */
872 FALSE, /* partial_inplace */
873 0, /* src_mask */
874 0xffff, /* dst_mask */
875 FALSE), /* pcrel_offset */
876
877 /* Like DTPREL16_HI, but adjust for low 16 bits. */
878 HOWTO (R_PPC_DTPREL16_HA,
879 16, /* rightshift */
880 1, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 FALSE, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_dont, /* complain_on_overflow */
885 ppc_elf_unhandled_reloc, /* special_function */
886 "R_PPC_DTPREL16_HA", /* name */
887 FALSE, /* partial_inplace */
888 0, /* src_mask */
889 0xffff, /* dst_mask */
890 FALSE), /* pcrel_offset */
891
892 /* Computes a tp-relative displacement, the difference between the value of
893 sym+add and the value of the thread pointer (r13). */
894 HOWTO (R_PPC_TPREL32,
895 0, /* rightshift */
896 2, /* size (0 = byte, 1 = short, 2 = long) */
897 32, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc_elf_unhandled_reloc, /* special_function */
902 "R_PPC_TPREL32", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffffffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* A 16 bit tprel reloc. */
909 HOWTO (R_PPC_TPREL16,
910 0, /* rightshift */
911 1, /* size (0 = byte, 1 = short, 2 = long) */
912 16, /* bitsize */
913 FALSE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_signed, /* complain_on_overflow */
916 ppc_elf_unhandled_reloc, /* special_function */
917 "R_PPC_TPREL16", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 0xffff, /* dst_mask */
921 FALSE), /* pcrel_offset */
922
923 /* Like TPREL16, but no overflow. */
924 HOWTO (R_PPC_TPREL16_LO,
925 0, /* rightshift */
926 1, /* size (0 = byte, 1 = short, 2 = long) */
927 16, /* bitsize */
928 FALSE, /* pc_relative */
929 0, /* bitpos */
930 complain_overflow_dont, /* complain_on_overflow */
931 ppc_elf_unhandled_reloc, /* special_function */
932 "R_PPC_TPREL16_LO", /* name */
933 FALSE, /* partial_inplace */
934 0, /* src_mask */
935 0xffff, /* dst_mask */
936 FALSE), /* pcrel_offset */
937
938 /* Like TPREL16_LO, but next higher group of 16 bits. */
939 HOWTO (R_PPC_TPREL16_HI,
940 16, /* rightshift */
941 1, /* size (0 = byte, 1 = short, 2 = long) */
942 16, /* bitsize */
943 FALSE, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc_elf_unhandled_reloc, /* special_function */
947 "R_PPC_TPREL16_HI", /* name */
948 FALSE, /* partial_inplace */
949 0, /* src_mask */
950 0xffff, /* dst_mask */
951 FALSE), /* pcrel_offset */
952
953 /* Like TPREL16_HI, but adjust for low 16 bits. */
954 HOWTO (R_PPC_TPREL16_HA,
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc_elf_unhandled_reloc, /* special_function */
962 "R_PPC_TPREL16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
969 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
970 to the first entry. */
971 HOWTO (R_PPC_GOT_TLSGD16,
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_signed, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_GOT_TLSGD16", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like GOT_TLSGD16, but no overflow. */
986 HOWTO (R_PPC_GOT_TLSGD16_LO,
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc_elf_unhandled_reloc, /* special_function */
994 "R_PPC_GOT_TLSGD16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1001 HOWTO (R_PPC_GOT_TLSGD16_HI,
1002 16, /* rightshift */
1003 1, /* size (0 = byte, 1 = short, 2 = long) */
1004 16, /* bitsize */
1005 FALSE, /* pc_relative */
1006 0, /* bitpos */
1007 complain_overflow_dont, /* complain_on_overflow */
1008 ppc_elf_unhandled_reloc, /* special_function */
1009 "R_PPC_GOT_TLSGD16_HI", /* name */
1010 FALSE, /* partial_inplace */
1011 0, /* src_mask */
1012 0xffff, /* dst_mask */
1013 FALSE), /* pcrel_offset */
1014
1015 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1016 HOWTO (R_PPC_GOT_TLSGD16_HA,
1017 16, /* rightshift */
1018 1, /* size (0 = byte, 1 = short, 2 = long) */
1019 16, /* bitsize */
1020 FALSE, /* pc_relative */
1021 0, /* bitpos */
1022 complain_overflow_dont, /* complain_on_overflow */
1023 ppc_elf_unhandled_reloc, /* special_function */
1024 "R_PPC_GOT_TLSGD16_HA", /* name */
1025 FALSE, /* partial_inplace */
1026 0, /* src_mask */
1027 0xffff, /* dst_mask */
1028 FALSE), /* pcrel_offset */
1029
1030 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1031 with values (sym+add)@dtpmod and zero, and computes the offset to the
1032 first entry. */
1033 HOWTO (R_PPC_GOT_TLSLD16,
1034 0, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_signed, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSLD16", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Like GOT_TLSLD16, but no overflow. */
1048 HOWTO (R_PPC_GOT_TLSLD16_LO,
1049 0, /* rightshift */
1050 1, /* size (0 = byte, 1 = short, 2 = long) */
1051 16, /* bitsize */
1052 FALSE, /* pc_relative */
1053 0, /* bitpos */
1054 complain_overflow_dont, /* complain_on_overflow */
1055 ppc_elf_unhandled_reloc, /* special_function */
1056 "R_PPC_GOT_TLSLD16_LO", /* name */
1057 FALSE, /* partial_inplace */
1058 0, /* src_mask */
1059 0xffff, /* dst_mask */
1060 FALSE), /* pcrel_offset */
1061
1062 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1063 HOWTO (R_PPC_GOT_TLSLD16_HI,
1064 16, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 FALSE, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_dont, /* complain_on_overflow */
1070 ppc_elf_unhandled_reloc, /* special_function */
1071 "R_PPC_GOT_TLSLD16_HI", /* name */
1072 FALSE, /* partial_inplace */
1073 0, /* src_mask */
1074 0xffff, /* dst_mask */
1075 FALSE), /* pcrel_offset */
1076
1077 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1078 HOWTO (R_PPC_GOT_TLSLD16_HA,
1079 16, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc_elf_unhandled_reloc, /* special_function */
1086 "R_PPC_GOT_TLSLD16_HA", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1093 the offset to the entry. */
1094 HOWTO (R_PPC_GOT_DTPREL16,
1095 0, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc_elf_unhandled_reloc, /* special_function */
1102 "R_PPC_GOT_DTPREL16", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like GOT_DTPREL16, but no overflow. */
1109 HOWTO (R_PPC_GOT_DTPREL16_LO,
1110 0, /* rightshift */
1111 1, /* size (0 = byte, 1 = short, 2 = long) */
1112 16, /* bitsize */
1113 FALSE, /* pc_relative */
1114 0, /* bitpos */
1115 complain_overflow_dont, /* complain_on_overflow */
1116 ppc_elf_unhandled_reloc, /* special_function */
1117 "R_PPC_GOT_DTPREL16_LO", /* name */
1118 FALSE, /* partial_inplace */
1119 0, /* src_mask */
1120 0xffff, /* dst_mask */
1121 FALSE), /* pcrel_offset */
1122
1123 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1124 HOWTO (R_PPC_GOT_DTPREL16_HI,
1125 16, /* rightshift */
1126 1, /* size (0 = byte, 1 = short, 2 = long) */
1127 16, /* bitsize */
1128 FALSE, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_dont, /* complain_on_overflow */
1131 ppc_elf_unhandled_reloc, /* special_function */
1132 "R_PPC_GOT_DTPREL16_HI", /* name */
1133 FALSE, /* partial_inplace */
1134 0, /* src_mask */
1135 0xffff, /* dst_mask */
1136 FALSE), /* pcrel_offset */
1137
1138 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1139 HOWTO (R_PPC_GOT_DTPREL16_HA,
1140 16, /* rightshift */
1141 1, /* size (0 = byte, 1 = short, 2 = long) */
1142 16, /* bitsize */
1143 FALSE, /* pc_relative */
1144 0, /* bitpos */
1145 complain_overflow_dont, /* complain_on_overflow */
1146 ppc_elf_unhandled_reloc, /* special_function */
1147 "R_PPC_GOT_DTPREL16_HA", /* name */
1148 FALSE, /* partial_inplace */
1149 0, /* src_mask */
1150 0xffff, /* dst_mask */
1151 FALSE), /* pcrel_offset */
1152
1153 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1154 offset to the entry. */
1155 HOWTO (R_PPC_GOT_TPREL16,
1156 0, /* rightshift */
1157 1, /* size (0 = byte, 1 = short, 2 = long) */
1158 16, /* bitsize */
1159 FALSE, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_signed, /* complain_on_overflow */
1162 ppc_elf_unhandled_reloc, /* special_function */
1163 "R_PPC_GOT_TPREL16", /* name */
1164 FALSE, /* partial_inplace */
1165 0, /* src_mask */
1166 0xffff, /* dst_mask */
1167 FALSE), /* pcrel_offset */
1168
1169 /* Like GOT_TPREL16, but no overflow. */
1170 HOWTO (R_PPC_GOT_TPREL16_LO,
1171 0, /* rightshift */
1172 1, /* size (0 = byte, 1 = short, 2 = long) */
1173 16, /* bitsize */
1174 FALSE, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_dont, /* complain_on_overflow */
1177 ppc_elf_unhandled_reloc, /* special_function */
1178 "R_PPC_GOT_TPREL16_LO", /* name */
1179 FALSE, /* partial_inplace */
1180 0, /* src_mask */
1181 0xffff, /* dst_mask */
1182 FALSE), /* pcrel_offset */
1183
1184 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1185 HOWTO (R_PPC_GOT_TPREL16_HI,
1186 16, /* rightshift */
1187 1, /* size (0 = byte, 1 = short, 2 = long) */
1188 16, /* bitsize */
1189 FALSE, /* pc_relative */
1190 0, /* bitpos */
1191 complain_overflow_dont, /* complain_on_overflow */
1192 ppc_elf_unhandled_reloc, /* special_function */
1193 "R_PPC_GOT_TPREL16_HI", /* name */
1194 FALSE, /* partial_inplace */
1195 0, /* src_mask */
1196 0xffff, /* dst_mask */
1197 FALSE), /* pcrel_offset */
1198
1199 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1200 HOWTO (R_PPC_GOT_TPREL16_HA,
1201 16, /* rightshift */
1202 1, /* size (0 = byte, 1 = short, 2 = long) */
1203 16, /* bitsize */
1204 FALSE, /* pc_relative */
1205 0, /* bitpos */
1206 complain_overflow_dont, /* complain_on_overflow */
1207 ppc_elf_unhandled_reloc, /* special_function */
1208 "R_PPC_GOT_TPREL16_HA", /* name */
1209 FALSE, /* partial_inplace */
1210 0, /* src_mask */
1211 0xffff, /* dst_mask */
1212 FALSE), /* pcrel_offset */
1213
1214 /* The remaining relocs are from the Embedded ELF ABI, and are not
1215 in the SVR4 ELF ABI. */
1216
1217 /* 32 bit value resulting from the addend minus the symbol. */
1218 HOWTO (R_PPC_EMB_NADDR32, /* type */
1219 0, /* rightshift */
1220 2, /* size (0 = byte, 1 = short, 2 = long) */
1221 32, /* bitsize */
1222 FALSE, /* pc_relative */
1223 0, /* bitpos */
1224 complain_overflow_bitfield, /* complain_on_overflow */
1225 bfd_elf_generic_reloc, /* special_function */
1226 "R_PPC_EMB_NADDR32", /* name */
1227 FALSE, /* partial_inplace */
1228 0, /* src_mask */
1229 0xffffffff, /* dst_mask */
1230 FALSE), /* pcrel_offset */
1231
1232 /* 16 bit value resulting from the addend minus the symbol. */
1233 HOWTO (R_PPC_EMB_NADDR16, /* type */
1234 0, /* rightshift */
1235 1, /* size (0 = byte, 1 = short, 2 = long) */
1236 16, /* bitsize */
1237 FALSE, /* pc_relative */
1238 0, /* bitpos */
1239 complain_overflow_bitfield, /* complain_on_overflow */
1240 bfd_elf_generic_reloc, /* special_function */
1241 "R_PPC_EMB_NADDR16", /* name */
1242 FALSE, /* partial_inplace */
1243 0, /* src_mask */
1244 0xffff, /* dst_mask */
1245 FALSE), /* pcrel_offset */
1246
1247 /* 16 bit value resulting from the addend minus the symbol. */
1248 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1249 0, /* rightshift */
1250 1, /* size (0 = byte, 1 = short, 2 = long) */
1251 16, /* bitsize */
1252 FALSE, /* pc_relative */
1253 0, /* bitpos */
1254 complain_overflow_dont,/* complain_on_overflow */
1255 bfd_elf_generic_reloc, /* special_function */
1256 "R_PPC_EMB_ADDR16_LO", /* name */
1257 FALSE, /* partial_inplace */
1258 0, /* src_mask */
1259 0xffff, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1261
1262 /* The high order 16 bits of the addend minus the symbol. */
1263 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1264 16, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_dont, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_PPC_EMB_NADDR16_HI", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xffff, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* The high order 16 bits of the result of the addend minus the address,
1278 plus 1 if the contents of the low 16 bits, treated as a signed number,
1279 is negative. */
1280 HOWTO (R_PPC_EMB_NADDR16_HA, /* 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 ppc_elf_addr16_ha_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HA", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* 16 bit value resulting from allocating a 4 byte word to hold an
1295 address in the .sdata section, and returning the offset from
1296 _SDA_BASE_ for that relocation. */
1297 HOWTO (R_PPC_EMB_SDAI16, /* type */
1298 0, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_bitfield, /* complain_on_overflow */
1304 bfd_elf_generic_reloc, /* special_function */
1305 "R_PPC_EMB_SDAI16", /* 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 .sdata2 section, and returning the offset from
1313 _SDA2_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDA2I16, /* 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_bitfield, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDA2I16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1329 small data items. */
1330 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1331 0, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_signed, /* complain_on_overflow */
1337 bfd_elf_generic_reloc, /* special_function */
1338 "R_PPC_EMB_SDA2REL", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1345 signed offset from the appropriate base, and filling in the register
1346 field with the appropriate register (0, 2, or 13). */
1347 HOWTO (R_PPC_EMB_SDA21, /* type */
1348 0, /* rightshift */
1349 2, /* 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_SDA21", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocation not handled: R_PPC_EMB_MRKREF */
1362 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1363 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1364 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1365 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1366 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1367
1368 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1369 in the 16 bit signed offset from the appropriate base, and filling in the
1370 register field with the appropriate register (0, 2, or 13). */
1371 HOWTO (R_PPC_EMB_RELSDA, /* type */
1372 0, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 TRUE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_signed, /* complain_on_overflow */
1378 bfd_elf_generic_reloc, /* special_function */
1379 "R_PPC_EMB_RELSDA", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* A 16 bit relative relocation. */
1386 HOWTO (R_PPC_REL16, /* type */
1387 0, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 TRUE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_bitfield, /* complain_on_overflow */
1393 bfd_elf_generic_reloc, /* special_function */
1394 "R_PPC_REL16", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 TRUE), /* pcrel_offset */
1399
1400 /* A 16 bit relative relocation without overflow. */
1401 HOWTO (R_PPC_REL16_LO, /* type */
1402 0, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 TRUE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont,/* complain_on_overflow */
1408 bfd_elf_generic_reloc, /* special_function */
1409 "R_PPC_REL16_LO", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 TRUE), /* pcrel_offset */
1414
1415 /* The high order 16 bits of a relative address. */
1416 HOWTO (R_PPC_REL16_HI, /* type */
1417 16, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 TRUE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 bfd_elf_generic_reloc, /* special_function */
1424 "R_PPC_REL16_HI", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 TRUE), /* pcrel_offset */
1429
1430 /* The high order 16 bits of a relative address, plus 1 if the contents of
1431 the low 16 bits, treated as a signed number, is negative. */
1432 HOWTO (R_PPC_REL16_HA, /* type */
1433 16, /* rightshift */
1434 1, /* size (0 = byte, 1 = short, 2 = long) */
1435 16, /* bitsize */
1436 TRUE, /* pc_relative */
1437 0, /* bitpos */
1438 complain_overflow_dont, /* complain_on_overflow */
1439 ppc_elf_addr16_ha_reloc, /* special_function */
1440 "R_PPC_REL16_HA", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0xffff, /* dst_mask */
1444 TRUE), /* pcrel_offset */
1445
1446 /* GNU extension to record C++ vtable hierarchy. */
1447 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1448 0, /* rightshift */
1449 0, /* size (0 = byte, 1 = short, 2 = long) */
1450 0, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_dont, /* complain_on_overflow */
1454 NULL, /* special_function */
1455 "R_PPC_GNU_VTINHERIT", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* GNU extension to record C++ vtable member usage. */
1462 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1463 0, /* rightshift */
1464 0, /* size (0 = byte, 1 = short, 2 = long) */
1465 0, /* bitsize */
1466 FALSE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_dont, /* complain_on_overflow */
1469 NULL, /* special_function */
1470 "R_PPC_GNU_VTENTRY", /* name */
1471 FALSE, /* partial_inplace */
1472 0, /* src_mask */
1473 0, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1475
1476 /* Phony reloc to handle AIX style TOC entries. */
1477 HOWTO (R_PPC_TOC16, /* type */
1478 0, /* rightshift */
1479 1, /* size (0 = byte, 1 = short, 2 = long) */
1480 16, /* bitsize */
1481 FALSE, /* pc_relative */
1482 0, /* bitpos */
1483 complain_overflow_signed, /* complain_on_overflow */
1484 bfd_elf_generic_reloc, /* special_function */
1485 "R_PPC_TOC16", /* name */
1486 FALSE, /* partial_inplace */
1487 0, /* src_mask */
1488 0xffff, /* dst_mask */
1489 FALSE), /* pcrel_offset */
1490 };
1491 \f
1492 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1493
1494 static void
1495 ppc_elf_howto_init (void)
1496 {
1497 unsigned int i, type;
1498
1499 for (i = 0;
1500 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1501 i++)
1502 {
1503 type = ppc_elf_howto_raw[i].type;
1504 if (type >= (sizeof (ppc_elf_howto_table)
1505 / sizeof (ppc_elf_howto_table[0])))
1506 abort ();
1507 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1508 }
1509 }
1510
1511 static reloc_howto_type *
1512 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1513 bfd_reloc_code_real_type code)
1514 {
1515 enum elf_ppc_reloc_type r;
1516
1517 /* Initialize howto table if not already done. */
1518 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1519 ppc_elf_howto_init ();
1520
1521 switch (code)
1522 {
1523 default:
1524 return NULL;
1525
1526 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1527 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1528 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1529 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1530 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1531 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1532 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1533 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1534 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1535 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1536 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1537 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1538 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1539 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1540 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1541 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1542 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1543 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1544 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1545 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1546 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1547 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1548 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1549 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1550 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1551 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1552 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1553 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1554 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1555 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1556 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1557 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1558 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1559 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1560 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1561 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1562 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1563 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1564 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1565 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1566 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1567 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1568 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1569 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1570 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1571 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1572 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1573 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1574 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1575 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1576 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1577 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1578 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1579 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1580 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1581 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1582 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1583 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1584 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1585 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1586 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1587 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1588 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1589 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1590 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1591 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1592 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1593 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1594 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1595 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1596 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1597 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1598 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1599 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1600 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1601 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1602 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1603 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1604 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1605 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1606 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1607 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1608 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1609 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1610 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1611 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1612 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1613 }
1614
1615 return ppc_elf_howto_table[r];
1616 };
1617
1618 static reloc_howto_type *
1619 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1620 const char *r_name)
1621 {
1622 unsigned int i;
1623
1624 for (i = 0;
1625 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1626 i++)
1627 if (ppc_elf_howto_raw[i].name != NULL
1628 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1629 return &ppc_elf_howto_raw[i];
1630
1631 return NULL;
1632 }
1633
1634 /* Set the howto pointer for a PowerPC ELF reloc. */
1635
1636 static void
1637 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1638 arelent *cache_ptr,
1639 Elf_Internal_Rela *dst)
1640 {
1641 /* Initialize howto table if not already done. */
1642 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1643 ppc_elf_howto_init ();
1644
1645 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1646 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1647
1648 /* Just because the above assert didn't trigger doesn't mean that
1649 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1650 if (!cache_ptr->howto)
1651 {
1652 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1653 abfd, ELF32_R_TYPE (dst->r_info));
1654 bfd_set_error (bfd_error_bad_value);
1655
1656 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1657 }
1658 }
1659
1660 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1661
1662 static bfd_reloc_status_type
1663 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1664 arelent *reloc_entry,
1665 asymbol *symbol,
1666 void *data ATTRIBUTE_UNUSED,
1667 asection *input_section,
1668 bfd *output_bfd,
1669 char **error_message ATTRIBUTE_UNUSED)
1670 {
1671 bfd_vma relocation;
1672
1673 if (output_bfd != NULL)
1674 {
1675 reloc_entry->address += input_section->output_offset;
1676 return bfd_reloc_ok;
1677 }
1678
1679 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1680 return bfd_reloc_outofrange;
1681
1682 if (bfd_is_com_section (symbol->section))
1683 relocation = 0;
1684 else
1685 relocation = symbol->value;
1686
1687 relocation += symbol->section->output_section->vma;
1688 relocation += symbol->section->output_offset;
1689 relocation += reloc_entry->addend;
1690 if (reloc_entry->howto->pc_relative)
1691 relocation -= reloc_entry->address;
1692
1693 reloc_entry->addend += (relocation & 0x8000) << 1;
1694
1695 return bfd_reloc_continue;
1696 }
1697
1698 static bfd_reloc_status_type
1699 ppc_elf_unhandled_reloc (bfd *abfd,
1700 arelent *reloc_entry,
1701 asymbol *symbol,
1702 void *data,
1703 asection *input_section,
1704 bfd *output_bfd,
1705 char **error_message)
1706 {
1707 /* If this is a relocatable link (output_bfd test tells us), just
1708 call the generic function. Any adjustment will be done at final
1709 link time. */
1710 if (output_bfd != NULL)
1711 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1712 input_section, output_bfd, error_message);
1713
1714 if (error_message != NULL)
1715 {
1716 static char buf[60];
1717 sprintf (buf, _("generic linker can't handle %s"),
1718 reloc_entry->howto->name);
1719 *error_message = buf;
1720 }
1721 return bfd_reloc_dangerous;
1722 }
1723 \f
1724 /* Sections created by the linker. */
1725
1726 typedef struct elf_linker_section
1727 {
1728 /* Pointer to the bfd section. */
1729 asection *section;
1730 /* Section name. */
1731 const char *name;
1732 /* Associated bss section name. */
1733 const char *bss_name;
1734 /* Associated symbol name. */
1735 const char *sym_name;
1736 /* Associated symbol. */
1737 struct elf_link_hash_entry *sym;
1738 } elf_linker_section_t;
1739
1740 /* Linked list of allocated pointer entries. This hangs off of the
1741 symbol lists, and provides allows us to return different pointers,
1742 based on different addend's. */
1743
1744 typedef struct elf_linker_section_pointers
1745 {
1746 /* next allocated pointer for this symbol */
1747 struct elf_linker_section_pointers *next;
1748 /* offset of pointer from beginning of section */
1749 bfd_vma offset;
1750 /* addend used */
1751 bfd_vma addend;
1752 /* which linker section this is */
1753 elf_linker_section_t *lsect;
1754 } elf_linker_section_pointers_t;
1755
1756 struct ppc_elf_obj_tdata
1757 {
1758 struct elf_obj_tdata elf;
1759
1760 /* A mapping from local symbols to offsets into the various linker
1761 sections added. This is index by the symbol index. */
1762 elf_linker_section_pointers_t **linker_section_pointers;
1763
1764 /* Flags used to auto-detect plt type. */
1765 unsigned int makes_plt_call : 1;
1766 unsigned int has_rel16 : 1;
1767 };
1768
1769 #define ppc_elf_tdata(bfd) \
1770 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1771
1772 #define elf_local_ptr_offsets(bfd) \
1773 (ppc_elf_tdata (bfd)->linker_section_pointers)
1774
1775 #define is_ppc_elf(bfd) \
1776 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1777 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1778
1779 /* Override the generic function because we store some extras. */
1780
1781 static bfd_boolean
1782 ppc_elf_mkobject (bfd *abfd)
1783 {
1784 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1785 PPC32_ELF_TDATA);
1786 }
1787
1788 /* Fix bad default arch selected for a 32 bit input bfd when the
1789 default is 64 bit. */
1790
1791 static bfd_boolean
1792 ppc_elf_object_p (bfd *abfd)
1793 {
1794 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1795 {
1796 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1797
1798 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1799 {
1800 /* Relies on arch after 64 bit default being 32 bit default. */
1801 abfd->arch_info = abfd->arch_info->next;
1802 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1803 }
1804 }
1805 return TRUE;
1806 }
1807
1808 /* Function to set whether a module needs the -mrelocatable bit set. */
1809
1810 static bfd_boolean
1811 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1812 {
1813 BFD_ASSERT (!elf_flags_init (abfd)
1814 || elf_elfheader (abfd)->e_flags == flags);
1815
1816 elf_elfheader (abfd)->e_flags = flags;
1817 elf_flags_init (abfd) = TRUE;
1818 return TRUE;
1819 }
1820
1821 /* Support for core dump NOTE sections. */
1822
1823 static bfd_boolean
1824 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1825 {
1826 int offset;
1827 unsigned int size;
1828
1829 switch (note->descsz)
1830 {
1831 default:
1832 return FALSE;
1833
1834 case 268: /* Linux/PPC. */
1835 /* pr_cursig */
1836 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1837
1838 /* pr_pid */
1839 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1840
1841 /* pr_reg */
1842 offset = 72;
1843 size = 192;
1844
1845 break;
1846 }
1847
1848 /* Make a ".reg/999" section. */
1849 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1850 size, note->descpos + offset);
1851 }
1852
1853 static bfd_boolean
1854 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1855 {
1856 switch (note->descsz)
1857 {
1858 default:
1859 return FALSE;
1860
1861 case 128: /* Linux/PPC elf_prpsinfo. */
1862 elf_tdata (abfd)->core_program
1863 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1864 elf_tdata (abfd)->core_command
1865 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1866 }
1867
1868 /* Note that for some reason, a spurious space is tacked
1869 onto the end of the args in some (at least one anyway)
1870 implementations, so strip it off if it exists. */
1871
1872 {
1873 char *command = elf_tdata (abfd)->core_command;
1874 int n = strlen (command);
1875
1876 if (0 < n && command[n - 1] == ' ')
1877 command[n - 1] = '\0';
1878 }
1879
1880 return TRUE;
1881 }
1882
1883 static char *
1884 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1885 {
1886 switch (note_type)
1887 {
1888 default:
1889 return NULL;
1890
1891 case NT_PRPSINFO:
1892 {
1893 char data[128];
1894 va_list ap;
1895
1896 va_start (ap, note_type);
1897 memset (data, 0, 32);
1898 strncpy (data + 32, va_arg (ap, const char *), 16);
1899 strncpy (data + 48, va_arg (ap, const char *), 80);
1900 va_end (ap);
1901 return elfcore_write_note (abfd, buf, bufsiz,
1902 "CORE", note_type, data, sizeof (data));
1903 }
1904
1905 case NT_PRSTATUS:
1906 {
1907 char data[268];
1908 va_list ap;
1909 long pid;
1910 int cursig;
1911 const void *greg;
1912
1913 va_start (ap, note_type);
1914 memset (data, 0, 72);
1915 pid = va_arg (ap, long);
1916 bfd_put_32 (abfd, pid, data + 24);
1917 cursig = va_arg (ap, int);
1918 bfd_put_16 (abfd, cursig, data + 12);
1919 greg = va_arg (ap, const void *);
1920 memcpy (data + 72, greg, 192);
1921 memset (data + 264, 0, 4);
1922 va_end (ap);
1923 return elfcore_write_note (abfd, buf, bufsiz,
1924 "CORE", note_type, data, sizeof (data));
1925 }
1926 }
1927 }
1928
1929 /* Return address for Ith PLT stub in section PLT, for relocation REL
1930 or (bfd_vma) -1 if it should not be included. */
1931
1932 static bfd_vma
1933 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1934 const asection *plt ATTRIBUTE_UNUSED,
1935 const arelent *rel)
1936 {
1937 return rel->address;
1938 }
1939
1940 /* Handle a PowerPC specific section when reading an object file. This
1941 is called when bfd_section_from_shdr finds a section with an unknown
1942 type. */
1943
1944 static bfd_boolean
1945 ppc_elf_section_from_shdr (bfd *abfd,
1946 Elf_Internal_Shdr *hdr,
1947 const char *name,
1948 int shindex)
1949 {
1950 asection *newsect;
1951 flagword flags;
1952
1953 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1954 return FALSE;
1955
1956 newsect = hdr->bfd_section;
1957 flags = bfd_get_section_flags (abfd, newsect);
1958 if (hdr->sh_flags & SHF_EXCLUDE)
1959 flags |= SEC_EXCLUDE;
1960
1961 if (hdr->sh_type == SHT_ORDERED)
1962 flags |= SEC_SORT_ENTRIES;
1963
1964 bfd_set_section_flags (abfd, newsect, flags);
1965 return TRUE;
1966 }
1967
1968 /* Set up any other section flags and such that may be necessary. */
1969
1970 static bfd_boolean
1971 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1972 Elf_Internal_Shdr *shdr,
1973 asection *asect)
1974 {
1975 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1976 shdr->sh_flags |= SHF_EXCLUDE;
1977
1978 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1979 shdr->sh_type = SHT_ORDERED;
1980
1981 return TRUE;
1982 }
1983
1984 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1985 need to bump up the number of section headers. */
1986
1987 static int
1988 ppc_elf_additional_program_headers (bfd *abfd,
1989 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1990 {
1991 asection *s;
1992 int ret = 0;
1993
1994 s = bfd_get_section_by_name (abfd, ".sbss2");
1995 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1996 ++ret;
1997
1998 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1999 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2000 ++ret;
2001
2002 return ret;
2003 }
2004
2005 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2006 .PPC.EMB.sbss0 a normal section, and not a bss section so
2007 that the linker doesn't crater when trying to make more than
2008 2 sections. */
2009
2010 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2011 {
2012 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2013 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2014 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2015 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2016 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2017 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2018 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2019 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2020 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2021 { NULL, 0, 0, 0, 0 }
2022 };
2023
2024 /* This is what we want for new plt/got. */
2025 static struct bfd_elf_special_section ppc_alt_plt =
2026 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2027
2028 static const struct bfd_elf_special_section *
2029 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2030 {
2031 const struct bfd_elf_special_section *ssect;
2032
2033 /* See if this is one of the special sections. */
2034 if (sec->name == NULL)
2035 return NULL;
2036
2037 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2038 sec->use_rela_p);
2039 if (ssect != NULL)
2040 {
2041 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2042 ssect = &ppc_alt_plt;
2043 return ssect;
2044 }
2045
2046 return _bfd_elf_get_sec_type_attr (abfd, sec);
2047 }
2048 \f
2049 /* Very simple linked list structure for recording apuinfo values. */
2050 typedef struct apuinfo_list
2051 {
2052 struct apuinfo_list *next;
2053 unsigned long value;
2054 }
2055 apuinfo_list;
2056
2057 static apuinfo_list *head;
2058
2059
2060 static void
2061 apuinfo_list_init (void)
2062 {
2063 head = NULL;
2064 }
2065
2066 static void
2067 apuinfo_list_add (unsigned long value)
2068 {
2069 apuinfo_list *entry = head;
2070
2071 while (entry != NULL)
2072 {
2073 if (entry->value == value)
2074 return;
2075 entry = entry->next;
2076 }
2077
2078 entry = bfd_malloc (sizeof (* entry));
2079 if (entry == NULL)
2080 return;
2081
2082 entry->value = value;
2083 entry->next = head;
2084 head = entry;
2085 }
2086
2087 static unsigned
2088 apuinfo_list_length (void)
2089 {
2090 apuinfo_list *entry;
2091 unsigned long count;
2092
2093 for (entry = head, count = 0;
2094 entry;
2095 entry = entry->next)
2096 ++ count;
2097
2098 return count;
2099 }
2100
2101 static inline unsigned long
2102 apuinfo_list_element (unsigned long number)
2103 {
2104 apuinfo_list * entry;
2105
2106 for (entry = head;
2107 entry && number --;
2108 entry = entry->next)
2109 ;
2110
2111 return entry ? entry->value : 0;
2112 }
2113
2114 static void
2115 apuinfo_list_finish (void)
2116 {
2117 apuinfo_list *entry;
2118
2119 for (entry = head; entry;)
2120 {
2121 apuinfo_list *next = entry->next;
2122 free (entry);
2123 entry = next;
2124 }
2125
2126 head = NULL;
2127 }
2128
2129 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2130 #define APUINFO_LABEL "APUinfo"
2131
2132 /* Scan the input BFDs and create a linked list of
2133 the APUinfo values that will need to be emitted. */
2134
2135 static void
2136 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2137 {
2138 bfd *ibfd;
2139 asection *asec;
2140 char *buffer;
2141 unsigned num_input_sections;
2142 bfd_size_type output_section_size;
2143 unsigned i;
2144 unsigned num_entries;
2145 unsigned long offset;
2146 unsigned long length;
2147 const char *error_message = NULL;
2148
2149 if (link_info == NULL)
2150 return;
2151
2152 /* Scan the input bfds, looking for apuinfo sections. */
2153 num_input_sections = 0;
2154 output_section_size = 0;
2155
2156 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2157 {
2158 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2159 if (asec)
2160 {
2161 ++ num_input_sections;
2162 output_section_size += asec->size;
2163 }
2164 }
2165
2166 /* We need at least one input sections
2167 in order to make merging worthwhile. */
2168 if (num_input_sections < 1)
2169 return;
2170
2171 /* Just make sure that the output section exists as well. */
2172 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2173 if (asec == NULL)
2174 return;
2175
2176 /* Allocate a buffer for the contents of the input sections. */
2177 buffer = bfd_malloc (output_section_size);
2178 if (buffer == NULL)
2179 return;
2180
2181 offset = 0;
2182 apuinfo_list_init ();
2183
2184 /* Read in the input sections contents. */
2185 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2186 {
2187 unsigned long datum;
2188 char *ptr;
2189
2190 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2191 if (asec == NULL)
2192 continue;
2193
2194 length = asec->size;
2195 if (length < 24)
2196 {
2197 error_message = _("corrupt or empty %s section in %B");
2198 goto fail;
2199 }
2200
2201 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2202 || (bfd_bread (buffer + offset, length, ibfd) != length))
2203 {
2204 error_message = _("unable to read in %s section from %B");
2205 goto fail;
2206 }
2207
2208 /* Process the contents of the section. */
2209 ptr = buffer + offset;
2210 error_message = _("corrupt %s section in %B");
2211
2212 /* Verify the contents of the header. Note - we have to
2213 extract the values this way in order to allow for a
2214 host whose endian-ness is different from the target. */
2215 datum = bfd_get_32 (ibfd, ptr);
2216 if (datum != sizeof APUINFO_LABEL)
2217 goto fail;
2218
2219 datum = bfd_get_32 (ibfd, ptr + 8);
2220 if (datum != 0x2)
2221 goto fail;
2222
2223 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2224 goto fail;
2225
2226 /* Get the number of bytes used for apuinfo entries. */
2227 datum = bfd_get_32 (ibfd, ptr + 4);
2228 if (datum + 20 != length)
2229 goto fail;
2230
2231 /* Make sure that we do not run off the end of the section. */
2232 if (offset + length > output_section_size)
2233 goto fail;
2234
2235 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2236 for (i = 0; i < datum; i += 4)
2237 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2238
2239 /* Update the offset. */
2240 offset += length;
2241 }
2242
2243 error_message = NULL;
2244
2245 /* Compute the size of the output section. */
2246 num_entries = apuinfo_list_length ();
2247 output_section_size = 20 + num_entries * 4;
2248
2249 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2250
2251 if (! bfd_set_section_size (abfd, asec, output_section_size))
2252 ibfd = abfd,
2253 error_message = _("warning: unable to set size of %s section in %B");
2254
2255 fail:
2256 free (buffer);
2257
2258 if (error_message)
2259 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2260 }
2261
2262 /* Prevent the output section from accumulating the input sections'
2263 contents. We have already stored this in our linked list structure. */
2264
2265 static bfd_boolean
2266 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2267 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2268 asection *asec,
2269 bfd_byte *contents ATTRIBUTE_UNUSED)
2270 {
2271 return (apuinfo_list_length ()
2272 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2273 }
2274
2275 /* Finally we can generate the output section. */
2276
2277 static void
2278 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2279 {
2280 bfd_byte *buffer;
2281 asection *asec;
2282 unsigned i;
2283 unsigned num_entries;
2284 bfd_size_type length;
2285
2286 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2287 if (asec == NULL)
2288 return;
2289
2290 if (apuinfo_list_length () == 0)
2291 return;
2292
2293 length = asec->size;
2294 if (length < 20)
2295 return;
2296
2297 buffer = bfd_malloc (length);
2298 if (buffer == NULL)
2299 {
2300 (*_bfd_error_handler)
2301 (_("failed to allocate space for new APUinfo section."));
2302 return;
2303 }
2304
2305 /* Create the apuinfo header. */
2306 num_entries = apuinfo_list_length ();
2307 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2308 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2309 bfd_put_32 (abfd, 0x2, buffer + 8);
2310 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2311
2312 length = 20;
2313 for (i = 0; i < num_entries; i++)
2314 {
2315 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2316 length += 4;
2317 }
2318
2319 if (length != asec->size)
2320 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2321
2322 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2323 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2324
2325 free (buffer);
2326
2327 apuinfo_list_finish ();
2328 }
2329 \f
2330 static bfd_boolean
2331 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2332 {
2333 bfd_byte buf[GLINK_ENTRY_SIZE];
2334
2335 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2336 return FALSE;
2337
2338 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2339 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2340 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2341 && bfd_get_32 (abfd, buf + 12) == BCTR);
2342 }
2343
2344 static bfd_boolean
2345 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2346 {
2347 bfd_vma vma = *(bfd_vma *) ptr;
2348 return ((section->flags & SEC_ALLOC) != 0
2349 && section->vma <= vma
2350 && vma < section->vma + section->size);
2351 }
2352
2353 static long
2354 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2355 long dynsymcount, asymbol **dynsyms,
2356 asymbol **ret)
2357 {
2358 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2359 asection *plt, *relplt, *dynamic, *glink;
2360 bfd_vma glink_vma = 0;
2361 bfd_vma resolv_vma = 0;
2362 bfd_vma stub_vma;
2363 asymbol *s;
2364 arelent *p;
2365 long count, i;
2366 size_t size;
2367 char *names;
2368 bfd_byte buf[4];
2369
2370 *ret = NULL;
2371
2372 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2373 return 0;
2374
2375 if (dynsymcount <= 0)
2376 return 0;
2377
2378 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2379 if (relplt == NULL)
2380 return 0;
2381
2382 plt = bfd_get_section_by_name (abfd, ".plt");
2383 if (plt == NULL)
2384 return 0;
2385
2386 /* Call common code to handle old-style executable PLTs. */
2387 if (elf_section_flags (plt) & SHF_EXECINSTR)
2388 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2389 dynsymcount, dynsyms, ret);
2390
2391 /* If this object was prelinked, the prelinker stored the address
2392 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2393 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2394 if (dynamic != NULL)
2395 {
2396 bfd_byte *dynbuf, *extdyn, *extdynend;
2397 size_t extdynsize;
2398 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2399
2400 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2401 return -1;
2402
2403 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2404 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2405
2406 extdyn = dynbuf;
2407 extdynend = extdyn + dynamic->size;
2408 for (; extdyn < extdynend; extdyn += extdynsize)
2409 {
2410 Elf_Internal_Dyn dyn;
2411 (*swap_dyn_in) (abfd, extdyn, &dyn);
2412
2413 if (dyn.d_tag == DT_NULL)
2414 break;
2415
2416 if (dyn.d_tag == DT_PPC_GOT)
2417 {
2418 unsigned int g_o_t = dyn.d_un.d_val;
2419 asection *got = bfd_get_section_by_name (abfd, ".got");
2420 if (got != NULL
2421 && bfd_get_section_contents (abfd, got, buf,
2422 g_o_t - got->vma + 4, 4))
2423 glink_vma = bfd_get_32 (abfd, buf);
2424 break;
2425 }
2426 }
2427 free (dynbuf);
2428 }
2429
2430 /* Otherwise we read the first plt entry. */
2431 if (glink_vma == 0)
2432 {
2433 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2434 glink_vma = bfd_get_32 (abfd, buf);
2435 }
2436
2437 if (glink_vma == 0)
2438 return 0;
2439
2440 /* The .glink section usually does not survive the final
2441 link; search for the section (usually .text) where the
2442 glink stubs now reside. */
2443 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2444 if (glink == NULL)
2445 return 0;
2446
2447 /* Determine glink PLT resolver by reading the relative branch
2448 from the first glink stub. */
2449 if (bfd_get_section_contents (abfd, glink, buf,
2450 glink_vma - glink->vma, 4))
2451 {
2452 unsigned int insn = bfd_get_32 (abfd, buf);
2453
2454 /* The first glink stub may either branch to the resolver ... */
2455 insn ^= B;
2456 if ((insn & ~0x3fffffc) == 0)
2457 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2458
2459 /* ... or fall through a bunch of NOPs. */
2460 else if ((insn ^ B ^ NOP) == 0)
2461 for (i = 4;
2462 bfd_get_section_contents (abfd, glink, buf,
2463 glink_vma - glink->vma + i, 4);
2464 i += 4)
2465 if (bfd_get_32 (abfd, buf) != NOP)
2466 {
2467 resolv_vma = glink_vma + i;
2468 break;
2469 }
2470 }
2471
2472 count = relplt->size / sizeof (Elf32_External_Rela);
2473 stub_vma = glink_vma - (bfd_vma) count * 16;
2474 /* If the stubs are those for -shared/-pie then we might have
2475 multiple stubs for each plt entry. If that is the case then
2476 there is no way to associate stubs with their plt entries short
2477 of figuring out the GOT pointer value used in the stub. */
2478 if (!is_nonpic_glink_stub (abfd, glink,
2479 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2480 return 0;
2481
2482 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2483 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2484 return -1;
2485
2486 size = count * sizeof (asymbol);
2487 p = relplt->relocation;
2488 for (i = 0; i < count; i++, p++)
2489 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2490
2491 size += sizeof (asymbol) + sizeof ("__glink");
2492
2493 if (resolv_vma)
2494 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2495
2496 s = *ret = bfd_malloc (size);
2497 if (s == NULL)
2498 return -1;
2499
2500 names = (char *) (s + count + 1 + (resolv_vma != 0));
2501 p = relplt->relocation;
2502 for (i = 0; i < count; i++, p++)
2503 {
2504 size_t len;
2505
2506 *s = **p->sym_ptr_ptr;
2507 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2508 we are defining a symbol, ensure one of them is set. */
2509 if ((s->flags & BSF_LOCAL) == 0)
2510 s->flags |= BSF_GLOBAL;
2511 s->flags |= BSF_SYNTHETIC;
2512 s->section = glink;
2513 s->value = stub_vma - glink->vma;
2514 s->name = names;
2515 s->udata.p = NULL;
2516 len = strlen ((*p->sym_ptr_ptr)->name);
2517 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2518 names += len;
2519 memcpy (names, "@plt", sizeof ("@plt"));
2520 names += sizeof ("@plt");
2521 ++s;
2522 stub_vma += 16;
2523 }
2524
2525 /* Add a symbol at the start of the glink branch table. */
2526 memset (s, 0, sizeof *s);
2527 s->the_bfd = abfd;
2528 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2529 s->section = glink;
2530 s->value = glink_vma - glink->vma;
2531 s->name = names;
2532 memcpy (names, "__glink", sizeof ("__glink"));
2533 names += sizeof ("__glink");
2534 s++;
2535 count++;
2536
2537 if (resolv_vma)
2538 {
2539 /* Add a symbol for the glink PLT resolver. */
2540 memset (s, 0, sizeof *s);
2541 s->the_bfd = abfd;
2542 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2543 s->section = glink;
2544 s->value = resolv_vma - glink->vma;
2545 s->name = names;
2546 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2547 names += sizeof ("__glink_PLTresolve");
2548 s++;
2549 count++;
2550 }
2551
2552 return count;
2553 }
2554 \f
2555 /* The following functions are specific to the ELF linker, while
2556 functions above are used generally. They appear in this file more
2557 or less in the order in which they are called. eg.
2558 ppc_elf_check_relocs is called early in the link process,
2559 ppc_elf_finish_dynamic_sections is one of the last functions
2560 called. */
2561
2562 /* The PPC linker needs to keep track of the number of relocs that it
2563 decides to copy as dynamic relocs in check_relocs for each symbol.
2564 This is so that it can later discard them if they are found to be
2565 unnecessary. We store the information in a field extending the
2566 regular ELF linker hash table. */
2567
2568 struct ppc_elf_dyn_relocs
2569 {
2570 struct ppc_elf_dyn_relocs *next;
2571
2572 /* The input section of the reloc. */
2573 asection *sec;
2574
2575 /* Total number of relocs copied for the input section. */
2576 bfd_size_type count;
2577
2578 /* Number of pc-relative relocs copied for the input section. */
2579 bfd_size_type pc_count;
2580 };
2581
2582 /* Track PLT entries needed for a given symbol. We might need more
2583 than one glink entry per symbol. */
2584 struct plt_entry
2585 {
2586 struct plt_entry *next;
2587
2588 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2589 This field stores the offset into .got2 used to initialise the
2590 GOT pointer reg. It will always be at least 32768 (and for
2591 current gcc this is the only offset used). */
2592 bfd_vma addend;
2593
2594 /* The .got2 section. */
2595 asection *sec;
2596
2597 /* PLT refcount or offset. */
2598 union
2599 {
2600 bfd_signed_vma refcount;
2601 bfd_vma offset;
2602 } plt;
2603
2604 /* .glink stub offset. */
2605 bfd_vma glink_offset;
2606 };
2607
2608 /* Of those relocs that might be copied as dynamic relocs, this function
2609 selects those that must be copied when linking a shared library,
2610 even when the symbol is local. */
2611
2612 static int
2613 must_be_dyn_reloc (struct bfd_link_info *info,
2614 enum elf_ppc_reloc_type r_type)
2615 {
2616 switch (r_type)
2617 {
2618 default:
2619 return 1;
2620
2621 case R_PPC_REL24:
2622 case R_PPC_REL14:
2623 case R_PPC_REL14_BRTAKEN:
2624 case R_PPC_REL14_BRNTAKEN:
2625 case R_PPC_REL32:
2626 return 0;
2627
2628 case R_PPC_TPREL32:
2629 case R_PPC_TPREL16:
2630 case R_PPC_TPREL16_LO:
2631 case R_PPC_TPREL16_HI:
2632 case R_PPC_TPREL16_HA:
2633 return !info->executable;
2634 }
2635 }
2636
2637 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2638 copying dynamic variables from a shared lib into an app's dynbss
2639 section, and instead use a dynamic relocation to point into the
2640 shared lib. */
2641 #define ELIMINATE_COPY_RELOCS 1
2642
2643 /* PPC ELF linker hash entry. */
2644
2645 struct ppc_elf_link_hash_entry
2646 {
2647 struct elf_link_hash_entry elf;
2648
2649 /* If this symbol is used in the linker created sections, the processor
2650 specific backend uses this field to map the field into the offset
2651 from the beginning of the section. */
2652 elf_linker_section_pointers_t *linker_section_pointer;
2653
2654 /* Track dynamic relocs copied for this symbol. */
2655 struct ppc_elf_dyn_relocs *dyn_relocs;
2656
2657 /* Contexts in which symbol is used in the GOT (or TOC).
2658 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2659 corresponding relocs are encountered during check_relocs.
2660 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2661 indicate the corresponding GOT entry type is not needed. */
2662 #define TLS_GD 1 /* GD reloc. */
2663 #define TLS_LD 2 /* LD reloc. */
2664 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2665 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2666 #define TLS_TLS 16 /* Any TLS reloc. */
2667 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2668 char tls_mask;
2669
2670 /* Nonzero if we have seen a small data relocation referring to this
2671 symbol. */
2672 unsigned char has_sda_refs;
2673 };
2674
2675 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2676
2677 /* PPC ELF linker hash table. */
2678
2679 struct ppc_elf_link_hash_table
2680 {
2681 struct elf_link_hash_table elf;
2682
2683 /* Short-cuts to get to dynamic linker sections. */
2684 asection *got;
2685 asection *relgot;
2686 asection *glink;
2687 asection *plt;
2688 asection *relplt;
2689 asection *dynbss;
2690 asection *relbss;
2691 asection *dynsbss;
2692 asection *relsbss;
2693 elf_linker_section_t sdata[2];
2694 asection *sbss;
2695
2696 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2697 asection *srelplt2;
2698
2699 /* The .got.plt section (VxWorks only)*/
2700 asection *sgotplt;
2701
2702 /* Shortcut to __tls_get_addr. */
2703 struct elf_link_hash_entry *tls_get_addr;
2704
2705 /* The bfd that forced an old-style PLT. */
2706 bfd *old_bfd;
2707
2708 /* TLS local dynamic got entry handling. */
2709 union {
2710 bfd_signed_vma refcount;
2711 bfd_vma offset;
2712 } tlsld_got;
2713
2714 /* Offset of branch table to PltResolve function in glink. */
2715 bfd_vma glink_pltresolve;
2716
2717 /* Size of reserved GOT entries. */
2718 unsigned int got_header_size;
2719 /* Non-zero if allocating the header left a gap. */
2720 unsigned int got_gap;
2721
2722 /* The type of PLT we have chosen to use. */
2723 enum ppc_elf_plt_type plt_type;
2724
2725 /* Set if we should emit symbols for stubs. */
2726 unsigned int emit_stub_syms:1;
2727
2728 /* True if the target system is VxWorks. */
2729 unsigned int is_vxworks:1;
2730
2731 /* The size of PLT entries. */
2732 int plt_entry_size;
2733 /* The distance between adjacent PLT slots. */
2734 int plt_slot_size;
2735 /* The size of the first PLT entry. */
2736 int plt_initial_entry_size;
2737
2738 /* Small local sym cache. */
2739 struct sym_cache sym_cache;
2740 };
2741
2742 /* Get the PPC ELF linker hash table from a link_info structure. */
2743
2744 #define ppc_elf_hash_table(p) \
2745 ((struct ppc_elf_link_hash_table *) (p)->hash)
2746
2747 /* Create an entry in a PPC ELF linker hash table. */
2748
2749 static struct bfd_hash_entry *
2750 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2751 struct bfd_hash_table *table,
2752 const char *string)
2753 {
2754 /* Allocate the structure if it has not already been allocated by a
2755 subclass. */
2756 if (entry == NULL)
2757 {
2758 entry = bfd_hash_allocate (table,
2759 sizeof (struct ppc_elf_link_hash_entry));
2760 if (entry == NULL)
2761 return entry;
2762 }
2763
2764 /* Call the allocation method of the superclass. */
2765 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2766 if (entry != NULL)
2767 {
2768 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2769 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2770 ppc_elf_hash_entry (entry)->tls_mask = 0;
2771 }
2772
2773 return entry;
2774 }
2775
2776 /* Create a PPC ELF linker hash table. */
2777
2778 static struct bfd_link_hash_table *
2779 ppc_elf_link_hash_table_create (bfd *abfd)
2780 {
2781 struct ppc_elf_link_hash_table *ret;
2782
2783 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2784 if (ret == NULL)
2785 return NULL;
2786
2787 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2788 ppc_elf_link_hash_newfunc,
2789 sizeof (struct ppc_elf_link_hash_entry)))
2790 {
2791 free (ret);
2792 return NULL;
2793 }
2794
2795 ret->elf.init_plt_refcount.refcount = 0;
2796 ret->elf.init_plt_refcount.glist = NULL;
2797 ret->elf.init_plt_offset.offset = 0;
2798 ret->elf.init_plt_offset.glist = NULL;
2799
2800 ret->sdata[0].name = ".sdata";
2801 ret->sdata[0].sym_name = "_SDA_BASE_";
2802 ret->sdata[0].bss_name = ".sbss";
2803
2804 ret->sdata[1].name = ".sdata2";
2805 ret->sdata[1].sym_name = "_SDA2_BASE_";
2806 ret->sdata[1].bss_name = ".sbss2";
2807
2808 ret->plt_entry_size = 12;
2809 ret->plt_slot_size = 8;
2810 ret->plt_initial_entry_size = 72;
2811
2812 return &ret->elf.root;
2813 }
2814
2815 /* Create .got and the related sections. */
2816
2817 static bfd_boolean
2818 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2819 {
2820 struct ppc_elf_link_hash_table *htab;
2821 asection *s;
2822 flagword flags;
2823
2824 if (!_bfd_elf_create_got_section (abfd, info))
2825 return FALSE;
2826
2827 htab = ppc_elf_hash_table (info);
2828 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2829 if (s == NULL)
2830 abort ();
2831
2832 if (htab->is_vxworks)
2833 {
2834 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2835 if (!htab->sgotplt)
2836 abort ();
2837 }
2838 else
2839 {
2840 /* The powerpc .got has a blrl instruction in it. Mark it
2841 executable. */
2842 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2843 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2844 if (!bfd_set_section_flags (abfd, s, flags))
2845 return FALSE;
2846 }
2847
2848 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2849 if (!htab->relgot)
2850 abort ();
2851
2852 return TRUE;
2853 }
2854
2855 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2856 to output sections (just like _bfd_elf_create_dynamic_sections has
2857 to create .dynbss and .rela.bss). */
2858
2859 static bfd_boolean
2860 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2861 {
2862 struct ppc_elf_link_hash_table *htab;
2863 asection *s;
2864 flagword flags;
2865
2866 htab = ppc_elf_hash_table (info);
2867
2868 if (htab->got == NULL
2869 && !ppc_elf_create_got (abfd, info))
2870 return FALSE;
2871
2872 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2873 return FALSE;
2874
2875 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2876 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2877
2878 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2879 htab->glink = s;
2880 if (s == NULL
2881 || !bfd_set_section_alignment (abfd, s, 4))
2882 return FALSE;
2883
2884 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2885 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2886 SEC_ALLOC | SEC_LINKER_CREATED);
2887 htab->dynsbss = s;
2888 if (s == NULL)
2889 return FALSE;
2890
2891 if (! info->shared)
2892 {
2893 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2894 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2895 htab->relsbss = s;
2896 if (s == NULL
2897 || ! bfd_set_section_alignment (abfd, s, 2))
2898 return FALSE;
2899 }
2900
2901 if (htab->is_vxworks
2902 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2903 return FALSE;
2904
2905 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2906 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2907 if (s == NULL)
2908 abort ();
2909
2910 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2911 if (htab->plt_type == PLT_VXWORKS)
2912 /* The VxWorks PLT is a loaded section with contents. */
2913 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2914 return bfd_set_section_flags (abfd, s, flags);
2915 }
2916
2917 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2918
2919 static void
2920 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2921 struct elf_link_hash_entry *dir,
2922 struct elf_link_hash_entry *ind)
2923 {
2924 struct ppc_elf_link_hash_entry *edir, *eind;
2925
2926 edir = (struct ppc_elf_link_hash_entry *) dir;
2927 eind = (struct ppc_elf_link_hash_entry *) ind;
2928
2929 if (eind->dyn_relocs != NULL)
2930 {
2931 if (edir->dyn_relocs != NULL)
2932 {
2933 struct ppc_elf_dyn_relocs **pp;
2934 struct ppc_elf_dyn_relocs *p;
2935
2936 /* Add reloc counts against the indirect sym to the direct sym
2937 list. Merge any entries against the same section. */
2938 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2939 {
2940 struct ppc_elf_dyn_relocs *q;
2941
2942 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2943 if (q->sec == p->sec)
2944 {
2945 q->pc_count += p->pc_count;
2946 q->count += p->count;
2947 *pp = p->next;
2948 break;
2949 }
2950 if (q == NULL)
2951 pp = &p->next;
2952 }
2953 *pp = edir->dyn_relocs;
2954 }
2955
2956 edir->dyn_relocs = eind->dyn_relocs;
2957 eind->dyn_relocs = NULL;
2958 }
2959
2960 edir->tls_mask |= eind->tls_mask;
2961 edir->has_sda_refs |= eind->has_sda_refs;
2962
2963 /* If called to transfer flags for a weakdef during processing
2964 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2965 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2966 if (!(ELIMINATE_COPY_RELOCS
2967 && eind->elf.root.type != bfd_link_hash_indirect
2968 && edir->elf.dynamic_adjusted))
2969 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2970
2971 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2972 edir->elf.ref_regular |= eind->elf.ref_regular;
2973 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2974 edir->elf.needs_plt |= eind->elf.needs_plt;
2975 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2976
2977 /* If we were called to copy over info for a weak sym, that's all. */
2978 if (eind->elf.root.type != bfd_link_hash_indirect)
2979 return;
2980
2981 /* Copy over the GOT refcount entries that we may have already seen to
2982 the symbol which just became indirect. */
2983 edir->elf.got.refcount += eind->elf.got.refcount;
2984 eind->elf.got.refcount = 0;
2985
2986 /* And plt entries. */
2987 if (eind->elf.plt.plist != NULL)
2988 {
2989 if (edir->elf.plt.plist != NULL)
2990 {
2991 struct plt_entry **entp;
2992 struct plt_entry *ent;
2993
2994 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2995 {
2996 struct plt_entry *dent;
2997
2998 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2999 if (dent->sec == ent->sec && dent->addend == ent->addend)
3000 {
3001 dent->plt.refcount += ent->plt.refcount;
3002 *entp = ent->next;
3003 break;
3004 }
3005 if (dent == NULL)
3006 entp = &ent->next;
3007 }
3008 *entp = edir->elf.plt.plist;
3009 }
3010
3011 edir->elf.plt.plist = eind->elf.plt.plist;
3012 eind->elf.plt.plist = NULL;
3013 }
3014
3015 if (eind->elf.dynindx != -1)
3016 {
3017 if (edir->elf.dynindx != -1)
3018 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3019 edir->elf.dynstr_index);
3020 edir->elf.dynindx = eind->elf.dynindx;
3021 edir->elf.dynstr_index = eind->elf.dynstr_index;
3022 eind->elf.dynindx = -1;
3023 eind->elf.dynstr_index = 0;
3024 }
3025 }
3026
3027 /* Hook called by the linker routine which adds symbols from an object
3028 file. We use it to put .comm items in .sbss, and not .bss. */
3029
3030 static bfd_boolean
3031 ppc_elf_add_symbol_hook (bfd *abfd,
3032 struct bfd_link_info *info,
3033 Elf_Internal_Sym *sym,
3034 const char **namep ATTRIBUTE_UNUSED,
3035 flagword *flagsp ATTRIBUTE_UNUSED,
3036 asection **secp,
3037 bfd_vma *valp)
3038 {
3039 if (sym->st_shndx == SHN_COMMON
3040 && !info->relocatable
3041 && is_ppc_elf (info->output_bfd)
3042 && sym->st_size <= elf_gp_size (abfd))
3043 {
3044 /* Common symbols less than or equal to -G nn bytes are automatically
3045 put into .sbss. */
3046 struct ppc_elf_link_hash_table *htab;
3047
3048 htab = ppc_elf_hash_table (info);
3049 if (htab->sbss == NULL)
3050 {
3051 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3052
3053 if (!htab->elf.dynobj)
3054 htab->elf.dynobj = abfd;
3055
3056 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3057 ".sbss",
3058 flags);
3059 if (htab->sbss == NULL)
3060 return FALSE;
3061 }
3062
3063 *secp = htab->sbss;
3064 *valp = sym->st_size;
3065 }
3066
3067 return TRUE;
3068 }
3069 \f
3070 static bfd_boolean
3071 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
3072 elf_linker_section_t *lsect)
3073 {
3074 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3075 TRUE, FALSE, TRUE);
3076 if (lsect->sym == NULL)
3077 return FALSE;
3078 if (lsect->sym->root.type == bfd_link_hash_new)
3079 lsect->sym->non_elf = 0;
3080 lsect->sym->ref_regular = 1;
3081 return TRUE;
3082 }
3083
3084 /* Create a special linker section. */
3085
3086 static bfd_boolean
3087 ppc_elf_create_linker_section (bfd *abfd,
3088 struct bfd_link_info *info,
3089 flagword flags,
3090 elf_linker_section_t *lsect)
3091 {
3092 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3093 asection *s;
3094
3095 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3096 | SEC_LINKER_CREATED);
3097
3098 /* Record the first bfd that needs the special sections. */
3099 if (!htab->elf.dynobj)
3100 htab->elf.dynobj = abfd;
3101
3102 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3103 lsect->name,
3104 flags);
3105 if (s == NULL
3106 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3107 return FALSE;
3108 lsect->section = s;
3109
3110 return create_sdata_sym (htab, lsect);
3111 }
3112
3113 /* Find a linker generated pointer with a given addend and type. */
3114
3115 static elf_linker_section_pointers_t *
3116 elf_find_pointer_linker_section
3117 (elf_linker_section_pointers_t *linker_pointers,
3118 bfd_vma addend,
3119 elf_linker_section_t *lsect)
3120 {
3121 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3122 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3123 return linker_pointers;
3124
3125 return NULL;
3126 }
3127
3128 /* Allocate a pointer to live in a linker created section. */
3129
3130 static bfd_boolean
3131 elf_create_pointer_linker_section (bfd *abfd,
3132 elf_linker_section_t *lsect,
3133 struct elf_link_hash_entry *h,
3134 const Elf_Internal_Rela *rel)
3135 {
3136 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3137 elf_linker_section_pointers_t *linker_section_ptr;
3138 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3139 bfd_size_type amt;
3140
3141 BFD_ASSERT (lsect != NULL);
3142
3143 /* Is this a global symbol? */
3144 if (h != NULL)
3145 {
3146 struct ppc_elf_link_hash_entry *eh;
3147
3148 /* Has this symbol already been allocated? If so, our work is done. */
3149 eh = (struct ppc_elf_link_hash_entry *) h;
3150 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3151 rel->r_addend,
3152 lsect))
3153 return TRUE;
3154
3155 ptr_linker_section_ptr = &eh->linker_section_pointer;
3156 }
3157 else
3158 {
3159 BFD_ASSERT (is_ppc_elf (abfd));
3160
3161 /* Allocation of a pointer to a local symbol. */
3162 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3163
3164 /* Allocate a table to hold the local symbols if first time. */
3165 if (!ptr)
3166 {
3167 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3168
3169 amt = num_symbols;
3170 amt *= sizeof (elf_linker_section_pointers_t *);
3171 ptr = bfd_zalloc (abfd, amt);
3172
3173 if (!ptr)
3174 return FALSE;
3175
3176 elf_local_ptr_offsets (abfd) = ptr;
3177 }
3178
3179 /* Has this symbol already been allocated? If so, our work is done. */
3180 if (elf_find_pointer_linker_section (ptr[r_symndx],
3181 rel->r_addend,
3182 lsect))
3183 return TRUE;
3184
3185 ptr_linker_section_ptr = &ptr[r_symndx];
3186 }
3187
3188 /* Allocate space for a pointer in the linker section, and allocate
3189 a new pointer record from internal memory. */
3190 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3191 amt = sizeof (elf_linker_section_pointers_t);
3192 linker_section_ptr = bfd_alloc (abfd, amt);
3193
3194 if (!linker_section_ptr)
3195 return FALSE;
3196
3197 linker_section_ptr->next = *ptr_linker_section_ptr;
3198 linker_section_ptr->addend = rel->r_addend;
3199 linker_section_ptr->lsect = lsect;
3200 *ptr_linker_section_ptr = linker_section_ptr;
3201
3202 linker_section_ptr->offset = lsect->section->size;
3203 lsect->section->size += 4;
3204
3205 #ifdef DEBUG
3206 fprintf (stderr,
3207 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3208 lsect->name, (long) linker_section_ptr->offset,
3209 (long) lsect->section->size);
3210 #endif
3211
3212 return TRUE;
3213 }
3214
3215 static bfd_boolean
3216 update_local_sym_info (bfd *abfd,
3217 Elf_Internal_Shdr *symtab_hdr,
3218 unsigned long r_symndx,
3219 int tls_type)
3220 {
3221 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3222 char *local_got_tls_masks;
3223
3224 if (local_got_refcounts == NULL)
3225 {
3226 bfd_size_type size = symtab_hdr->sh_info;
3227
3228 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3229 local_got_refcounts = bfd_zalloc (abfd, size);
3230 if (local_got_refcounts == NULL)
3231 return FALSE;
3232 elf_local_got_refcounts (abfd) = local_got_refcounts;
3233 }
3234
3235 local_got_refcounts[r_symndx] += 1;
3236 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3237 local_got_tls_masks[r_symndx] |= tls_type;
3238 return TRUE;
3239 }
3240
3241 static bfd_boolean
3242 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
3243 asection *sec, bfd_vma addend)
3244 {
3245 struct plt_entry *ent;
3246
3247 if (addend < 32768)
3248 sec = NULL;
3249 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3250 if (ent->sec == sec && ent->addend == addend)
3251 break;
3252 if (ent == NULL)
3253 {
3254 bfd_size_type amt = sizeof (*ent);
3255 ent = bfd_alloc (abfd, amt);
3256 if (ent == NULL)
3257 return FALSE;
3258 ent->next = h->plt.plist;
3259 ent->sec = sec;
3260 ent->addend = addend;
3261 ent->plt.refcount = 0;
3262 h->plt.plist = ent;
3263 }
3264 ent->plt.refcount += 1;
3265 return TRUE;
3266 }
3267
3268 static struct plt_entry *
3269 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3270 {
3271 struct plt_entry *ent;
3272
3273 if (addend < 32768)
3274 sec = NULL;
3275 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3276 if (ent->sec == sec && ent->addend == addend)
3277 break;
3278 return ent;
3279 }
3280
3281 static void
3282 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3283 {
3284 (*_bfd_error_handler)
3285 (_("%B: relocation %s cannot be used when making a shared object"),
3286 abfd,
3287 ppc_elf_howto_table[r_type]->name);
3288 bfd_set_error (bfd_error_bad_value);
3289 }
3290
3291 /* Look through the relocs for a section during the first phase, and
3292 allocate space in the global offset table or procedure linkage
3293 table. */
3294
3295 static bfd_boolean
3296 ppc_elf_check_relocs (bfd *abfd,
3297 struct bfd_link_info *info,
3298 asection *sec,
3299 const Elf_Internal_Rela *relocs)
3300 {
3301 struct ppc_elf_link_hash_table *htab;
3302 Elf_Internal_Shdr *symtab_hdr;
3303 struct elf_link_hash_entry **sym_hashes;
3304 const Elf_Internal_Rela *rel;
3305 const Elf_Internal_Rela *rel_end;
3306 asection *got2, *sreloc;
3307 struct elf_link_hash_entry *tga;
3308
3309 if (info->relocatable)
3310 return TRUE;
3311
3312 /* Don't do anything special with non-loaded, non-alloced sections.
3313 In particular, any relocs in such sections should not affect GOT
3314 and PLT reference counting (ie. we don't allow them to create GOT
3315 or PLT entries), there's no possibility or desire to optimize TLS
3316 relocs, and there's not much point in propagating relocs to shared
3317 libs that the dynamic linker won't relocate. */
3318 if ((sec->flags & SEC_ALLOC) == 0)
3319 return TRUE;
3320
3321 #ifdef DEBUG
3322 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3323 sec, abfd);
3324 #endif
3325
3326 BFD_ASSERT (is_ppc_elf (abfd));
3327
3328 /* Initialize howto table if not already done. */
3329 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3330 ppc_elf_howto_init ();
3331
3332 htab = ppc_elf_hash_table (info);
3333 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3334 FALSE, FALSE, TRUE);
3335 symtab_hdr = &elf_symtab_hdr (abfd);
3336 sym_hashes = elf_sym_hashes (abfd);
3337 got2 = bfd_get_section_by_name (abfd, ".got2");
3338 sreloc = NULL;
3339
3340 rel_end = relocs + sec->reloc_count;
3341 for (rel = relocs; rel < rel_end; rel++)
3342 {
3343 unsigned long r_symndx;
3344 enum elf_ppc_reloc_type r_type;
3345 struct elf_link_hash_entry *h;
3346 int tls_type;
3347
3348 r_symndx = ELF32_R_SYM (rel->r_info);
3349 if (r_symndx < symtab_hdr->sh_info)
3350 h = NULL;
3351 else
3352 {
3353 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3354 while (h->root.type == bfd_link_hash_indirect
3355 || h->root.type == bfd_link_hash_warning)
3356 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3357 }
3358
3359 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3360 This shows up in particular in an R_PPC_ADDR32 in the eabi
3361 startup code. */
3362 if (h != NULL
3363 && htab->got == NULL
3364 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3365 {
3366 if (htab->elf.dynobj == NULL)
3367 htab->elf.dynobj = abfd;
3368 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3369 return FALSE;
3370 BFD_ASSERT (h == htab->elf.hgot);
3371 }
3372
3373 tls_type = 0;
3374 r_type = ELF32_R_TYPE (rel->r_info);
3375 if (h != NULL && h == tga)
3376 switch (r_type)
3377 {
3378 default:
3379 break;
3380
3381 case R_PPC_PLTREL24:
3382 case R_PPC_LOCAL24PC:
3383 case R_PPC_REL24:
3384 case R_PPC_REL14:
3385 case R_PPC_REL14_BRTAKEN:
3386 case R_PPC_REL14_BRNTAKEN:
3387 case R_PPC_ADDR24:
3388 case R_PPC_ADDR14:
3389 case R_PPC_ADDR14_BRTAKEN:
3390 case R_PPC_ADDR14_BRNTAKEN:
3391 if (rel != relocs
3392 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3393 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3394 /* We have a new-style __tls_get_addr call with a marker
3395 reloc. */
3396 ;
3397 else
3398 /* Mark this section as having an old-style call. */
3399 sec->has_tls_get_addr_call = 1;
3400 break;
3401 }
3402
3403 switch (r_type)
3404 {
3405 case R_PPC_TLSGD:
3406 case R_PPC_TLSLD:
3407 /* These special tls relocs tie a call to __tls_get_addr with
3408 its parameter symbol. */
3409 break;
3410
3411 case R_PPC_GOT_TLSLD16:
3412 case R_PPC_GOT_TLSLD16_LO:
3413 case R_PPC_GOT_TLSLD16_HI:
3414 case R_PPC_GOT_TLSLD16_HA:
3415 tls_type = TLS_TLS | TLS_LD;
3416 goto dogottls;
3417
3418 case R_PPC_GOT_TLSGD16:
3419 case R_PPC_GOT_TLSGD16_LO:
3420 case R_PPC_GOT_TLSGD16_HI:
3421 case R_PPC_GOT_TLSGD16_HA:
3422 tls_type = TLS_TLS | TLS_GD;
3423 goto dogottls;
3424
3425 case R_PPC_GOT_TPREL16:
3426 case R_PPC_GOT_TPREL16_LO:
3427 case R_PPC_GOT_TPREL16_HI:
3428 case R_PPC_GOT_TPREL16_HA:
3429 if (!info->executable)
3430 info->flags |= DF_STATIC_TLS;
3431 tls_type = TLS_TLS | TLS_TPREL;
3432 goto dogottls;
3433
3434 case R_PPC_GOT_DTPREL16:
3435 case R_PPC_GOT_DTPREL16_LO:
3436 case R_PPC_GOT_DTPREL16_HI:
3437 case R_PPC_GOT_DTPREL16_HA:
3438 tls_type = TLS_TLS | TLS_DTPREL;
3439 dogottls:
3440 sec->has_tls_reloc = 1;
3441 /* Fall thru */
3442
3443 /* GOT16 relocations */
3444 case R_PPC_GOT16:
3445 case R_PPC_GOT16_LO:
3446 case R_PPC_GOT16_HI:
3447 case R_PPC_GOT16_HA:
3448 /* This symbol requires a global offset table entry. */
3449 if (htab->got == NULL)
3450 {
3451 if (htab->elf.dynobj == NULL)
3452 htab->elf.dynobj = abfd;
3453 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3454 return FALSE;
3455 }
3456 if (h != NULL)
3457 {
3458 h->got.refcount += 1;
3459 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3460 }
3461 else
3462 /* This is a global offset table entry for a local symbol. */
3463 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3464 return FALSE;
3465 break;
3466
3467 /* Indirect .sdata relocation. */
3468 case R_PPC_EMB_SDAI16:
3469 if (info->shared)
3470 {
3471 bad_shared_reloc (abfd, r_type);
3472 return FALSE;
3473 }
3474 if (htab->sdata[0].section == NULL
3475 && !ppc_elf_create_linker_section (abfd, info, 0,
3476 &htab->sdata[0]))
3477 return FALSE;
3478 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3479 h, rel))
3480 return FALSE;
3481 if (h != NULL)
3482 {
3483 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3484 h->non_got_ref = TRUE;
3485 }
3486 break;
3487
3488 /* Indirect .sdata2 relocation. */
3489 case R_PPC_EMB_SDA2I16:
3490 if (info->shared)
3491 {
3492 bad_shared_reloc (abfd, r_type);
3493 return FALSE;
3494 }
3495 if (htab->sdata[1].section == NULL
3496 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3497 &htab->sdata[1]))
3498 return FALSE;
3499 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3500 h, rel))
3501 return FALSE;
3502 if (h != NULL)
3503 {
3504 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3505 h->non_got_ref = TRUE;
3506 }
3507 break;
3508
3509 case R_PPC_SDAREL16:
3510 if (info->shared)
3511 {
3512 bad_shared_reloc (abfd, r_type);
3513 return FALSE;
3514 }
3515 if (htab->sdata[0].sym == NULL
3516 && !create_sdata_sym (htab, &htab->sdata[0]))
3517 return FALSE;
3518 if (h != NULL)
3519 {
3520 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3521 h->non_got_ref = TRUE;
3522 }
3523 break;
3524
3525 case R_PPC_EMB_SDA2REL:
3526 if (info->shared)
3527 {
3528 bad_shared_reloc (abfd, r_type);
3529 return FALSE;
3530 }
3531 if (htab->sdata[1].sym == NULL
3532 && !create_sdata_sym (htab, &htab->sdata[1]))
3533 return FALSE;
3534 if (h != NULL)
3535 {
3536 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3537 h->non_got_ref = TRUE;
3538 }
3539 break;
3540
3541 case R_PPC_EMB_SDA21:
3542 case R_PPC_EMB_RELSDA:
3543 if (info->shared)
3544 {
3545 bad_shared_reloc (abfd, r_type);
3546 return FALSE;
3547 }
3548 if (htab->sdata[0].sym == NULL
3549 && !create_sdata_sym (htab, &htab->sdata[0]))
3550 return FALSE;
3551 if (htab->sdata[1].sym == NULL
3552 && !create_sdata_sym (htab, &htab->sdata[1]))
3553 return FALSE;
3554 if (h != NULL)
3555 {
3556 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3557 h->non_got_ref = TRUE;
3558 }
3559 break;
3560
3561 case R_PPC_EMB_NADDR32:
3562 case R_PPC_EMB_NADDR16:
3563 case R_PPC_EMB_NADDR16_LO:
3564 case R_PPC_EMB_NADDR16_HI:
3565 case R_PPC_EMB_NADDR16_HA:
3566 if (info->shared)
3567 {
3568 bad_shared_reloc (abfd, r_type);
3569 return FALSE;
3570 }
3571 if (h != NULL)
3572 h->non_got_ref = TRUE;
3573 break;
3574
3575 case R_PPC_PLT32:
3576 case R_PPC_PLTREL24:
3577 case R_PPC_PLTREL32:
3578 case R_PPC_PLT16_LO:
3579 case R_PPC_PLT16_HI:
3580 case R_PPC_PLT16_HA:
3581 #ifdef DEBUG
3582 fprintf (stderr, "Reloc requires a PLT entry\n");
3583 #endif
3584 /* This symbol requires a procedure linkage table entry. We
3585 actually build the entry in finish_dynamic_symbol,
3586 because this might be a case of linking PIC code without
3587 linking in any dynamic objects, in which case we don't
3588 need to generate a procedure linkage table after all. */
3589
3590 if (h == NULL)
3591 {
3592 /* It does not make sense to have a procedure linkage
3593 table entry for a local symbol. */
3594 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3595 "local symbol"),
3596 abfd,
3597 sec,
3598 (long) rel->r_offset,
3599 ppc_elf_howto_table[r_type]->name);
3600 bfd_set_error (bfd_error_bad_value);
3601 return FALSE;
3602 }
3603 else
3604 {
3605 bfd_vma addend = 0;
3606
3607 if (r_type == R_PPC_PLTREL24)
3608 {
3609 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3610 addend = rel->r_addend;
3611 }
3612 h->needs_plt = 1;
3613 if (!update_plt_info (abfd, h, got2, addend))
3614 return FALSE;
3615 }
3616 break;
3617
3618 /* The following relocations don't need to propagate the
3619 relocation if linking a shared object since they are
3620 section relative. */
3621 case R_PPC_SECTOFF:
3622 case R_PPC_SECTOFF_LO:
3623 case R_PPC_SECTOFF_HI:
3624 case R_PPC_SECTOFF_HA:
3625 case R_PPC_DTPREL16:
3626 case R_PPC_DTPREL16_LO:
3627 case R_PPC_DTPREL16_HI:
3628 case R_PPC_DTPREL16_HA:
3629 case R_PPC_TOC16:
3630 break;
3631
3632 case R_PPC_REL16:
3633 case R_PPC_REL16_LO:
3634 case R_PPC_REL16_HI:
3635 case R_PPC_REL16_HA:
3636 ppc_elf_tdata (abfd)->has_rel16 = 1;
3637 break;
3638
3639 /* These are just markers. */
3640 case R_PPC_TLS:
3641 case R_PPC_EMB_MRKREF:
3642 case R_PPC_NONE:
3643 case R_PPC_max:
3644 break;
3645
3646 /* These should only appear in dynamic objects. */
3647 case R_PPC_COPY:
3648 case R_PPC_GLOB_DAT:
3649 case R_PPC_JMP_SLOT:
3650 case R_PPC_RELATIVE:
3651 break;
3652
3653 /* These aren't handled yet. We'll report an error later. */
3654 case R_PPC_ADDR30:
3655 case R_PPC_EMB_RELSEC16:
3656 case R_PPC_EMB_RELST_LO:
3657 case R_PPC_EMB_RELST_HI:
3658 case R_PPC_EMB_RELST_HA:
3659 case R_PPC_EMB_BIT_FLD:
3660 break;
3661
3662 /* This refers only to functions defined in the shared library. */
3663 case R_PPC_LOCAL24PC:
3664 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3665 {
3666 htab->plt_type = PLT_OLD;
3667 htab->old_bfd = abfd;
3668 }
3669 break;
3670
3671 /* This relocation describes the C++ object vtable hierarchy.
3672 Reconstruct it for later use during GC. */
3673 case R_PPC_GNU_VTINHERIT:
3674 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3675 return FALSE;
3676 break;
3677
3678 /* This relocation describes which C++ vtable entries are actually
3679 used. Record for later use during GC. */
3680 case R_PPC_GNU_VTENTRY:
3681 BFD_ASSERT (h != NULL);
3682 if (h != NULL
3683 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3684 return FALSE;
3685 break;
3686
3687 /* We shouldn't really be seeing these. */
3688 case R_PPC_TPREL32:
3689 case R_PPC_TPREL16:
3690 case R_PPC_TPREL16_LO:
3691 case R_PPC_TPREL16_HI:
3692 case R_PPC_TPREL16_HA:
3693 if (!info->executable)
3694 info->flags |= DF_STATIC_TLS;
3695 goto dodyn;
3696
3697 /* Nor these. */
3698 case R_PPC_DTPMOD32:
3699 case R_PPC_DTPREL32:
3700 goto dodyn;
3701
3702 case R_PPC_REL32:
3703 if (h == NULL
3704 && got2 != NULL
3705 && (sec->flags & SEC_CODE) != 0
3706 && (info->shared || info->pie)
3707 && htab->plt_type == PLT_UNSET)
3708 {
3709 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3710 the start of a function, which assembles to a REL32
3711 reference to .got2. If we detect one of these, then
3712 force the old PLT layout because the linker cannot
3713 reliably deduce the GOT pointer value needed for
3714 PLT call stubs. */
3715 asection *s;
3716 Elf_Internal_Sym *isym;
3717
3718 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3719 abfd, r_symndx);
3720 if (isym == NULL)
3721 return FALSE;
3722
3723 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3724 if (s == got2)
3725 {
3726 htab->plt_type = PLT_OLD;
3727 htab->old_bfd = abfd;
3728 }
3729 }
3730 if (h == NULL || h == htab->elf.hgot)
3731 break;
3732 /* fall through */
3733
3734 case R_PPC_ADDR32:
3735 case R_PPC_ADDR16:
3736 case R_PPC_ADDR16_LO:
3737 case R_PPC_ADDR16_HI:
3738 case R_PPC_ADDR16_HA:
3739 case R_PPC_UADDR32:
3740 case R_PPC_UADDR16:
3741 if (h != NULL && !info->shared)
3742 {
3743 /* We may need a plt entry if the symbol turns out to be
3744 a function defined in a dynamic object. */
3745 if (!update_plt_info (abfd, h, NULL, 0))
3746 return FALSE;
3747
3748 /* We may need a copy reloc too. */
3749 h->non_got_ref = 1;
3750 h->pointer_equality_needed = 1;
3751 }
3752 goto dodyn;
3753
3754 case R_PPC_REL24:
3755 case R_PPC_REL14:
3756 case R_PPC_REL14_BRTAKEN:
3757 case R_PPC_REL14_BRNTAKEN:
3758 if (h == NULL)
3759 break;
3760 if (h == htab->elf.hgot)
3761 {
3762 if (htab->plt_type == PLT_UNSET)
3763 {
3764 htab->plt_type = PLT_OLD;
3765 htab->old_bfd = abfd;
3766 }
3767 break;
3768 }
3769 /* fall through */
3770
3771 case R_PPC_ADDR24:
3772 case R_PPC_ADDR14:
3773 case R_PPC_ADDR14_BRTAKEN:
3774 case R_PPC_ADDR14_BRNTAKEN:
3775 if (h != NULL && !info->shared)
3776 {
3777 /* We may need a plt entry if the symbol turns out to be
3778 a function defined in a dynamic object. */
3779 if (!update_plt_info (abfd, h, NULL, 0))
3780 return FALSE;
3781 break;
3782 }
3783
3784 dodyn:
3785 /* If we are creating a shared library, and this is a reloc
3786 against a global symbol, or a non PC relative reloc
3787 against a local symbol, then we need to copy the reloc
3788 into the shared library. However, if we are linking with
3789 -Bsymbolic, we do not need to copy a reloc against a
3790 global symbol which is defined in an object we are
3791 including in the link (i.e., DEF_REGULAR is set). At
3792 this point we have not seen all the input files, so it is
3793 possible that DEF_REGULAR is not set now but will be set
3794 later (it is never cleared). In case of a weak definition,
3795 DEF_REGULAR may be cleared later by a strong definition in
3796 a shared library. We account for that possibility below by
3797 storing information in the dyn_relocs field of the hash
3798 table entry. A similar situation occurs when creating
3799 shared libraries and symbol visibility changes render the
3800 symbol local.
3801
3802 If on the other hand, we are creating an executable, we
3803 may need to keep relocations for symbols satisfied by a
3804 dynamic library if we manage to avoid copy relocs for the
3805 symbol. */
3806 if ((info->shared
3807 && (must_be_dyn_reloc (info, r_type)
3808 || (h != NULL
3809 && (! info->symbolic
3810 || h->root.type == bfd_link_hash_defweak
3811 || !h->def_regular))))
3812 || (ELIMINATE_COPY_RELOCS
3813 && !info->shared
3814 && h != NULL
3815 && (h->root.type == bfd_link_hash_defweak
3816 || !h->def_regular)))
3817 {
3818 struct ppc_elf_dyn_relocs *p;
3819 struct ppc_elf_dyn_relocs **head;
3820
3821 #ifdef DEBUG
3822 fprintf (stderr,
3823 "ppc_elf_check_relocs needs to "
3824 "create relocation for %s\n",
3825 (h && h->root.root.string
3826 ? h->root.root.string : "<unknown>"));
3827 #endif
3828 if (sreloc == NULL)
3829 {
3830 if (htab->elf.dynobj == NULL)
3831 htab->elf.dynobj = abfd;
3832
3833 sreloc = _bfd_elf_make_dynamic_reloc_section
3834 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3835
3836 if (sreloc == NULL)
3837 return FALSE;
3838 }
3839
3840 /* If this is a global symbol, we count the number of
3841 relocations we need for this symbol. */
3842 if (h != NULL)
3843 {
3844 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3845 }
3846 else
3847 {
3848 /* Track dynamic relocs needed for local syms too.
3849 We really need local syms available to do this
3850 easily. Oh well. */
3851 asection *s;
3852 void *vpp;
3853 Elf_Internal_Sym *isym;
3854
3855 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3856 abfd, r_symndx);
3857 if (isym == NULL)
3858 return FALSE;
3859
3860 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3861 if (s == NULL)
3862 s = sec;
3863
3864 vpp = &elf_section_data (s)->local_dynrel;
3865 head = (struct ppc_elf_dyn_relocs **) vpp;
3866 }
3867
3868 p = *head;
3869 if (p == NULL || p->sec != sec)
3870 {
3871 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3872 if (p == NULL)
3873 return FALSE;
3874 p->next = *head;
3875 *head = p;
3876 p->sec = sec;
3877 p->count = 0;
3878 p->pc_count = 0;
3879 }
3880
3881 p->count += 1;
3882 if (!must_be_dyn_reloc (info, r_type))
3883 p->pc_count += 1;
3884 }
3885
3886 break;
3887 }
3888 }
3889
3890 return TRUE;
3891 }
3892 \f
3893
3894 /* Merge object attributes from IBFD into OBFD. Raise an error if
3895 there are conflicting attributes. */
3896 static bfd_boolean
3897 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3898 {
3899 obj_attribute *in_attr, *in_attrs;
3900 obj_attribute *out_attr, *out_attrs;
3901
3902 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3903 {
3904 /* This is the first object. Copy the attributes. */
3905 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3906
3907 /* Use the Tag_null value to indicate the attributes have been
3908 initialized. */
3909 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3910
3911 return TRUE;
3912 }
3913
3914 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3915 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3916
3917 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3918 non-conflicting ones. */
3919 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3920 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3921 if (in_attr->i != out_attr->i)
3922 {
3923 out_attr->type = 1;
3924 if (out_attr->i == 0)
3925 out_attr->i = in_attr->i;
3926 else if (in_attr->i == 0)
3927 ;
3928 else if (out_attr->i == 1 && in_attr->i == 2)
3929 _bfd_error_handler
3930 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3931 else if (out_attr->i == 1 && in_attr->i == 3)
3932 _bfd_error_handler
3933 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3934 obfd, ibfd);
3935 else if (out_attr->i == 3 && in_attr->i == 1)
3936 _bfd_error_handler
3937 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3938 ibfd, obfd);
3939 else if (out_attr->i == 3 && in_attr->i == 2)
3940 _bfd_error_handler
3941 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
3942 ibfd, obfd);
3943 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
3944 _bfd_error_handler
3945 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3946 else if (in_attr->i > 3)
3947 _bfd_error_handler
3948 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3949 in_attr->i);
3950 else
3951 _bfd_error_handler
3952 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3953 out_attr->i);
3954 }
3955
3956 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3957 merge non-conflicting ones. */
3958 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3959 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3960 if (in_attr->i != out_attr->i)
3961 {
3962 const char *in_abi = NULL, *out_abi = NULL;
3963
3964 switch (in_attr->i)
3965 {
3966 case 1: in_abi = "generic"; break;
3967 case 2: in_abi = "AltiVec"; break;
3968 case 3: in_abi = "SPE"; break;
3969 }
3970
3971 switch (out_attr->i)
3972 {
3973 case 1: out_abi = "generic"; break;
3974 case 2: out_abi = "AltiVec"; break;
3975 case 3: out_abi = "SPE"; break;
3976 }
3977
3978 out_attr->type = 1;
3979 if (out_attr->i == 0)
3980 out_attr->i = in_attr->i;
3981 else if (in_attr->i == 0)
3982 ;
3983 /* For now, allow generic to transition to AltiVec or SPE
3984 without a warning. If GCC marked files with their stack
3985 alignment and used don't-care markings for files which are
3986 not affected by the vector ABI, we could warn about this
3987 case too. */
3988 else if (out_attr->i == 1)
3989 out_attr->i = in_attr->i;
3990 else if (in_attr->i == 1)
3991 ;
3992 else if (in_abi == NULL)
3993 _bfd_error_handler
3994 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3995 in_attr->i);
3996 else if (out_abi == NULL)
3997 _bfd_error_handler
3998 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3999 in_attr->i);
4000 else
4001 _bfd_error_handler
4002 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4003 ibfd, obfd, in_abi, out_abi);
4004 }
4005
4006 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4007 and merge non-conflicting ones. */
4008 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4009 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4010 if (in_attr->i != out_attr->i)
4011 {
4012 out_attr->type = 1;
4013 if (out_attr->i == 0)
4014 out_attr->i = in_attr->i;
4015 else if (in_attr->i == 0)
4016 ;
4017 else if (out_attr->i == 1 && in_attr->i == 2)
4018 _bfd_error_handler
4019 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4020 else if (out_attr->i == 2 && in_attr->i == 1)
4021 _bfd_error_handler
4022 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4023 else if (in_attr->i > 2)
4024 _bfd_error_handler
4025 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4026 in_attr->i);
4027 else
4028 _bfd_error_handler
4029 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4030 out_attr->i);
4031 }
4032
4033 /* Merge Tag_compatibility attributes and any common GNU ones. */
4034 _bfd_elf_merge_object_attributes (ibfd, obfd);
4035
4036 return TRUE;
4037 }
4038
4039 /* Merge backend specific data from an object file to the output
4040 object file when linking. */
4041
4042 static bfd_boolean
4043 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4044 {
4045 flagword old_flags;
4046 flagword new_flags;
4047 bfd_boolean error;
4048
4049 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4050 return TRUE;
4051
4052 /* Check if we have the same endianess. */
4053 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4054 return FALSE;
4055
4056 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4057 return FALSE;
4058
4059 new_flags = elf_elfheader (ibfd)->e_flags;
4060 old_flags = elf_elfheader (obfd)->e_flags;
4061 if (!elf_flags_init (obfd))
4062 {
4063 /* First call, no flags set. */
4064 elf_flags_init (obfd) = TRUE;
4065 elf_elfheader (obfd)->e_flags = new_flags;
4066 }
4067
4068 /* Compatible flags are ok. */
4069 else if (new_flags == old_flags)
4070 ;
4071
4072 /* Incompatible flags. */
4073 else
4074 {
4075 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4076 to be linked with either. */
4077 error = FALSE;
4078 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4079 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4080 {
4081 error = TRUE;
4082 (*_bfd_error_handler)
4083 (_("%B: compiled with -mrelocatable and linked with "
4084 "modules compiled normally"), ibfd);
4085 }
4086 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4087 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4088 {
4089 error = TRUE;
4090 (*_bfd_error_handler)
4091 (_("%B: compiled normally and linked with "
4092 "modules compiled with -mrelocatable"), ibfd);
4093 }
4094
4095 /* The output is -mrelocatable-lib iff both the input files are. */
4096 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4097 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4098
4099 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4100 but each input file is either -mrelocatable or -mrelocatable-lib. */
4101 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4102 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4103 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4104 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4105
4106 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4107 any module uses it. */
4108 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4109
4110 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4111 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4112
4113 /* Warn about any other mismatches. */
4114 if (new_flags != old_flags)
4115 {
4116 error = TRUE;
4117 (*_bfd_error_handler)
4118 (_("%B: uses different e_flags (0x%lx) fields "
4119 "than previous modules (0x%lx)"),
4120 ibfd, (long) new_flags, (long) old_flags);
4121 }
4122
4123 if (error)
4124 {
4125 bfd_set_error (bfd_error_bad_value);
4126 return FALSE;
4127 }
4128 }
4129
4130 return TRUE;
4131 }
4132 \f
4133 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4134 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4135 int
4136 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4137 struct bfd_link_info *info,
4138 enum ppc_elf_plt_type plt_style,
4139 int emit_stub_syms)
4140 {
4141 struct ppc_elf_link_hash_table *htab;
4142 flagword flags;
4143
4144 htab = ppc_elf_hash_table (info);
4145
4146 if (htab->plt_type == PLT_UNSET)
4147 {
4148 if (plt_style == PLT_OLD)
4149 htab->plt_type = PLT_OLD;
4150 else
4151 {
4152 bfd *ibfd;
4153 enum ppc_elf_plt_type plt_type = plt_style;
4154
4155 /* Look through the reloc flags left by ppc_elf_check_relocs.
4156 Use the old style bss plt if a file makes plt calls
4157 without using the new relocs, and if ld isn't given
4158 --secure-plt and we never see REL16 relocs. */
4159 if (plt_type == PLT_UNSET)
4160 plt_type = PLT_OLD;
4161 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4162 if (is_ppc_elf (ibfd))
4163 {
4164 if (ppc_elf_tdata (ibfd)->has_rel16)
4165 plt_type = PLT_NEW;
4166 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4167 {
4168 plt_type = PLT_OLD;
4169 htab->old_bfd = ibfd;
4170 break;
4171 }
4172 }
4173 htab->plt_type = plt_type;
4174 }
4175 }
4176 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4177 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4178
4179 htab->emit_stub_syms = emit_stub_syms;
4180
4181 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4182
4183 if (htab->plt_type == PLT_NEW)
4184 {
4185 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4186 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4187
4188 /* The new PLT is a loaded section. */
4189 if (htab->plt != NULL
4190 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4191 return -1;
4192
4193 /* The new GOT is not executable. */
4194 if (htab->got != NULL
4195 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4196 return -1;
4197 }
4198 else
4199 {
4200 /* Stop an unused .glink section from affecting .text alignment. */
4201 if (htab->glink != NULL
4202 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4203 return -1;
4204 }
4205 return htab->plt_type == PLT_NEW;
4206 }
4207 \f
4208 /* Return the section that should be marked against GC for a given
4209 relocation. */
4210
4211 static asection *
4212 ppc_elf_gc_mark_hook (asection *sec,
4213 struct bfd_link_info *info,
4214 Elf_Internal_Rela *rel,
4215 struct elf_link_hash_entry *h,
4216 Elf_Internal_Sym *sym)
4217 {
4218 if (h != NULL)
4219 switch (ELF32_R_TYPE (rel->r_info))
4220 {
4221 case R_PPC_GNU_VTINHERIT:
4222 case R_PPC_GNU_VTENTRY:
4223 return NULL;
4224 }
4225
4226 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4227 }
4228
4229 /* Update the got, plt and dynamic reloc reference counts for the
4230 section being removed. */
4231
4232 static bfd_boolean
4233 ppc_elf_gc_sweep_hook (bfd *abfd,
4234 struct bfd_link_info *info,
4235 asection *sec,
4236 const Elf_Internal_Rela *relocs)
4237 {
4238 struct ppc_elf_link_hash_table *htab;
4239 Elf_Internal_Shdr *symtab_hdr;
4240 struct elf_link_hash_entry **sym_hashes;
4241 bfd_signed_vma *local_got_refcounts;
4242 const Elf_Internal_Rela *rel, *relend;
4243 asection *got2;
4244
4245 if (info->relocatable)
4246 return TRUE;
4247
4248 if ((sec->flags & SEC_ALLOC) == 0)
4249 return TRUE;
4250
4251 elf_section_data (sec)->local_dynrel = NULL;
4252
4253 htab = ppc_elf_hash_table (info);
4254 symtab_hdr = &elf_symtab_hdr (abfd);
4255 sym_hashes = elf_sym_hashes (abfd);
4256 local_got_refcounts = elf_local_got_refcounts (abfd);
4257 got2 = bfd_get_section_by_name (abfd, ".got2");
4258
4259 relend = relocs + sec->reloc_count;
4260 for (rel = relocs; rel < relend; rel++)
4261 {
4262 unsigned long r_symndx;
4263 enum elf_ppc_reloc_type r_type;
4264 struct elf_link_hash_entry *h = NULL;
4265
4266 r_symndx = ELF32_R_SYM (rel->r_info);
4267 if (r_symndx >= symtab_hdr->sh_info)
4268 {
4269 struct ppc_elf_dyn_relocs **pp, *p;
4270 struct ppc_elf_link_hash_entry *eh;
4271
4272 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4273 while (h->root.type == bfd_link_hash_indirect
4274 || h->root.type == bfd_link_hash_warning)
4275 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4276 eh = (struct ppc_elf_link_hash_entry *) h;
4277
4278 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4279 if (p->sec == sec)
4280 {
4281 /* Everything must go for SEC. */
4282 *pp = p->next;
4283 break;
4284 }
4285 }
4286
4287 r_type = ELF32_R_TYPE (rel->r_info);
4288 switch (r_type)
4289 {
4290 case R_PPC_GOT_TLSLD16:
4291 case R_PPC_GOT_TLSLD16_LO:
4292 case R_PPC_GOT_TLSLD16_HI:
4293 case R_PPC_GOT_TLSLD16_HA:
4294 case R_PPC_GOT_TLSGD16:
4295 case R_PPC_GOT_TLSGD16_LO:
4296 case R_PPC_GOT_TLSGD16_HI:
4297 case R_PPC_GOT_TLSGD16_HA:
4298 case R_PPC_GOT_TPREL16:
4299 case R_PPC_GOT_TPREL16_LO:
4300 case R_PPC_GOT_TPREL16_HI:
4301 case R_PPC_GOT_TPREL16_HA:
4302 case R_PPC_GOT_DTPREL16:
4303 case R_PPC_GOT_DTPREL16_LO:
4304 case R_PPC_GOT_DTPREL16_HI:
4305 case R_PPC_GOT_DTPREL16_HA:
4306 case R_PPC_GOT16:
4307 case R_PPC_GOT16_LO:
4308 case R_PPC_GOT16_HI:
4309 case R_PPC_GOT16_HA:
4310 if (h != NULL)
4311 {
4312 if (h->got.refcount > 0)
4313 h->got.refcount--;
4314 }
4315 else if (local_got_refcounts != NULL)
4316 {
4317 if (local_got_refcounts[r_symndx] > 0)
4318 local_got_refcounts[r_symndx]--;
4319 }
4320 break;
4321
4322 case R_PPC_REL24:
4323 case R_PPC_REL14:
4324 case R_PPC_REL14_BRTAKEN:
4325 case R_PPC_REL14_BRNTAKEN:
4326 case R_PPC_REL32:
4327 if (h == NULL || h == htab->elf.hgot)
4328 break;
4329 /* Fall thru */
4330
4331 case R_PPC_ADDR32:
4332 case R_PPC_ADDR24:
4333 case R_PPC_ADDR16:
4334 case R_PPC_ADDR16_LO:
4335 case R_PPC_ADDR16_HI:
4336 case R_PPC_ADDR16_HA:
4337 case R_PPC_ADDR14:
4338 case R_PPC_ADDR14_BRTAKEN:
4339 case R_PPC_ADDR14_BRNTAKEN:
4340 case R_PPC_UADDR32:
4341 case R_PPC_UADDR16:
4342 if (info->shared)
4343 break;
4344
4345 case R_PPC_PLT32:
4346 case R_PPC_PLTREL24:
4347 case R_PPC_PLTREL32:
4348 case R_PPC_PLT16_LO:
4349 case R_PPC_PLT16_HI:
4350 case R_PPC_PLT16_HA:
4351 if (h != NULL)
4352 {
4353 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4354 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4355 if (ent->plt.refcount > 0)
4356 ent->plt.refcount -= 1;
4357 }
4358 break;
4359
4360 default:
4361 break;
4362 }
4363 }
4364 return TRUE;
4365 }
4366 \f
4367 /* Set plt output section type, htab->tls_get_addr, and call the
4368 generic ELF tls_setup function. */
4369
4370 asection *
4371 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4372 {
4373 struct ppc_elf_link_hash_table *htab;
4374
4375 htab = ppc_elf_hash_table (info);
4376 if (htab->plt_type == PLT_NEW
4377 && htab->plt != NULL
4378 && htab->plt->output_section != NULL)
4379 {
4380 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4381 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4382 }
4383
4384 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4385 FALSE, FALSE, TRUE);
4386 return _bfd_elf_tls_setup (obfd, info);
4387 }
4388
4389 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4390 HASH. */
4391
4392 static bfd_boolean
4393 branch_reloc_hash_match (const bfd *ibfd,
4394 const Elf_Internal_Rela *rel,
4395 const struct elf_link_hash_entry *hash)
4396 {
4397 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4398 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4399 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4400
4401 if (r_symndx >= symtab_hdr->sh_info
4402 && (r_type == R_PPC_PLTREL24
4403 || r_type == R_PPC_LOCAL24PC
4404 || r_type == R_PPC_REL14
4405 || r_type == R_PPC_REL14_BRTAKEN
4406 || r_type == R_PPC_REL14_BRNTAKEN
4407 || r_type == R_PPC_REL24
4408 || r_type == R_PPC_ADDR24
4409 || r_type == R_PPC_ADDR14
4410 || r_type == R_PPC_ADDR14_BRTAKEN
4411 || r_type == R_PPC_ADDR14_BRNTAKEN))
4412 {
4413 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4414 struct elf_link_hash_entry *h;
4415
4416 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4417 while (h->root.type == bfd_link_hash_indirect
4418 || h->root.type == bfd_link_hash_warning)
4419 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4420 if (h == hash)
4421 return TRUE;
4422 }
4423 return FALSE;
4424 }
4425
4426 /* Run through all the TLS relocs looking for optimization
4427 opportunities. */
4428
4429 bfd_boolean
4430 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4431 struct bfd_link_info *info)
4432 {
4433 bfd *ibfd;
4434 asection *sec;
4435 struct ppc_elf_link_hash_table *htab;
4436 int pass;
4437
4438 if (info->relocatable || !info->executable)
4439 return TRUE;
4440
4441 htab = ppc_elf_hash_table (info);
4442 /* Make two passes through the relocs. First time check that tls
4443 relocs involved in setting up a tls_get_addr call are indeed
4444 followed by such a call. If they are not, exclude them from
4445 the optimizations done on the second pass. */
4446 for (pass = 0; pass < 2; ++pass)
4447 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4448 {
4449 Elf_Internal_Sym *locsyms = NULL;
4450 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4451
4452 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4453 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4454 {
4455 Elf_Internal_Rela *relstart, *rel, *relend;
4456
4457 /* Read the relocations. */
4458 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4459 info->keep_memory);
4460 if (relstart == NULL)
4461 return FALSE;
4462
4463 relend = relstart + sec->reloc_count;
4464 for (rel = relstart; rel < relend; rel++)
4465 {
4466 enum elf_ppc_reloc_type r_type;
4467 unsigned long r_symndx;
4468 struct elf_link_hash_entry *h = NULL;
4469 char *tls_mask;
4470 char tls_set, tls_clear;
4471 bfd_boolean is_local;
4472 int expecting_tls_get_addr;
4473 bfd_signed_vma *got_count;
4474
4475 r_symndx = ELF32_R_SYM (rel->r_info);
4476 if (r_symndx >= symtab_hdr->sh_info)
4477 {
4478 struct elf_link_hash_entry **sym_hashes;
4479
4480 sym_hashes = elf_sym_hashes (ibfd);
4481 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4482 while (h->root.type == bfd_link_hash_indirect
4483 || h->root.type == bfd_link_hash_warning)
4484 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4485 }
4486
4487 expecting_tls_get_addr = 0;
4488 is_local = FALSE;
4489 if (h == NULL
4490 || !h->def_dynamic)
4491 is_local = TRUE;
4492
4493 r_type = ELF32_R_TYPE (rel->r_info);
4494 switch (r_type)
4495 {
4496 case R_PPC_GOT_TLSLD16:
4497 case R_PPC_GOT_TLSLD16_LO:
4498 expecting_tls_get_addr = 1;
4499 /* Fall thru */
4500
4501 case R_PPC_GOT_TLSLD16_HI:
4502 case R_PPC_GOT_TLSLD16_HA:
4503 /* These relocs should never be against a symbol
4504 defined in a shared lib. Leave them alone if
4505 that turns out to be the case. */
4506 if (!is_local)
4507 continue;
4508
4509 /* LD -> LE */
4510 tls_set = 0;
4511 tls_clear = TLS_LD;
4512 break;
4513
4514 case R_PPC_GOT_TLSGD16:
4515 case R_PPC_GOT_TLSGD16_LO:
4516 expecting_tls_get_addr = 1;
4517 /* Fall thru */
4518
4519 case R_PPC_GOT_TLSGD16_HI:
4520 case R_PPC_GOT_TLSGD16_HA:
4521 if (is_local)
4522 /* GD -> LE */
4523 tls_set = 0;
4524 else
4525 /* GD -> IE */
4526 tls_set = TLS_TLS | TLS_TPRELGD;
4527 tls_clear = TLS_GD;
4528 break;
4529
4530 case R_PPC_GOT_TPREL16:
4531 case R_PPC_GOT_TPREL16_LO:
4532 case R_PPC_GOT_TPREL16_HI:
4533 case R_PPC_GOT_TPREL16_HA:
4534 if (is_local)
4535 {
4536 /* IE -> LE */
4537 tls_set = 0;
4538 tls_clear = TLS_TPREL;
4539 break;
4540 }
4541 else
4542 continue;
4543
4544 default:
4545 continue;
4546 }
4547
4548 if (pass == 0)
4549 {
4550 if (!expecting_tls_get_addr
4551 || !sec->has_tls_get_addr_call)
4552 continue;
4553
4554 if (rel + 1 < relend
4555 && branch_reloc_hash_match (ibfd, rel + 1,
4556 htab->tls_get_addr))
4557 continue;
4558
4559 /* Uh oh, we didn't find the expected call. We
4560 could just mark this symbol to exclude it
4561 from tls optimization but it's safer to skip
4562 the entire section. */
4563 sec->has_tls_reloc = 0;
4564 break;
4565 }
4566
4567 if (h != NULL)
4568 {
4569 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4570 got_count = &h->got.refcount;
4571 }
4572 else
4573 {
4574 Elf_Internal_Sym *sym;
4575 bfd_signed_vma *lgot_refs;
4576 char *lgot_masks;
4577
4578 if (locsyms == NULL)
4579 {
4580 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4581 if (locsyms == NULL)
4582 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4583 symtab_hdr->sh_info,
4584 0, NULL, NULL, NULL);
4585 if (locsyms == NULL)
4586 {
4587 if (elf_section_data (sec)->relocs != relstart)
4588 free (relstart);
4589 return FALSE;
4590 }
4591 }
4592 sym = locsyms + r_symndx;
4593 lgot_refs = elf_local_got_refcounts (ibfd);
4594 if (lgot_refs == NULL)
4595 abort ();
4596 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4597 tls_mask = &lgot_masks[r_symndx];
4598 got_count = &lgot_refs[r_symndx];
4599 }
4600
4601 if (tls_set == 0)
4602 {
4603 /* We managed to get rid of a got entry. */
4604 if (*got_count > 0)
4605 *got_count -= 1;
4606 }
4607
4608 if (expecting_tls_get_addr)
4609 {
4610 struct plt_entry *ent;
4611
4612 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4613 if (ent != NULL && ent->plt.refcount > 0)
4614 ent->plt.refcount -= 1;
4615 }
4616
4617 *tls_mask |= tls_set;
4618 *tls_mask &= ~tls_clear;
4619 }
4620
4621 if (elf_section_data (sec)->relocs != relstart)
4622 free (relstart);
4623 }
4624
4625 if (locsyms != NULL
4626 && (symtab_hdr->contents != (unsigned char *) locsyms))
4627 {
4628 if (!info->keep_memory)
4629 free (locsyms);
4630 else
4631 symtab_hdr->contents = (unsigned char *) locsyms;
4632 }
4633 }
4634 return TRUE;
4635 }
4636 \f
4637 /* Return true if we have dynamic relocs that apply to read-only sections. */
4638
4639 static bfd_boolean
4640 readonly_dynrelocs (struct elf_link_hash_entry *h)
4641 {
4642 struct ppc_elf_dyn_relocs *p;
4643
4644 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4645 {
4646 asection *s = p->sec->output_section;
4647
4648 if (s != NULL
4649 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4650 == (SEC_READONLY | SEC_ALLOC)))
4651 return TRUE;
4652 }
4653 return FALSE;
4654 }
4655
4656 /* Adjust a symbol defined by a dynamic object and referenced by a
4657 regular object. The current definition is in some section of the
4658 dynamic object, but we're not including those sections. We have to
4659 change the definition to something the rest of the link can
4660 understand. */
4661
4662 static bfd_boolean
4663 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4664 struct elf_link_hash_entry *h)
4665 {
4666 struct ppc_elf_link_hash_table *htab;
4667 asection *s;
4668
4669 #ifdef DEBUG
4670 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4671 h->root.root.string);
4672 #endif
4673
4674 /* Make sure we know what is going on here. */
4675 htab = ppc_elf_hash_table (info);
4676 BFD_ASSERT (htab->elf.dynobj != NULL
4677 && (h->needs_plt
4678 || h->u.weakdef != NULL
4679 || (h->def_dynamic
4680 && h->ref_regular
4681 && !h->def_regular)));
4682
4683 /* Deal with function syms. */
4684 if (h->type == STT_FUNC
4685 || h->needs_plt)
4686 {
4687 /* Clear procedure linkage table information for any symbol that
4688 won't need a .plt entry. */
4689 struct plt_entry *ent;
4690 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4691 if (ent->plt.refcount > 0)
4692 break;
4693 if (ent == NULL
4694 || SYMBOL_CALLS_LOCAL (info, h)
4695 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4696 && h->root.type == bfd_link_hash_undefweak))
4697 {
4698 /* A PLT entry is not required/allowed when:
4699
4700 1. We are not using ld.so; because then the PLT entry
4701 can't be set up, so we can't use one. In this case,
4702 ppc_elf_adjust_dynamic_symbol won't even be called.
4703
4704 2. GC has rendered the entry unused.
4705
4706 3. We know for certain that a call to this symbol
4707 will go to this object, or will remain undefined. */
4708 h->plt.plist = NULL;
4709 h->needs_plt = 0;
4710 }
4711 else
4712 {
4713 /* After adjust_dynamic_symbol, non_got_ref set means that
4714 dyn_relocs for this symbol should be discarded.
4715 If we get here we know we are making a PLT entry for this
4716 symbol, and in an executable we'd normally resolve
4717 relocations against this symbol to the PLT entry. Allow
4718 dynamic relocs if the reference is weak, and the dynamic
4719 relocs will not cause text relocation. */
4720 if (!h->ref_regular_nonweak
4721 && h->non_got_ref
4722 && !htab->is_vxworks
4723 && !ppc_elf_hash_entry (h)->has_sda_refs
4724 && !readonly_dynrelocs (h))
4725 h->non_got_ref = 0;
4726 }
4727 return TRUE;
4728 }
4729 else
4730 h->plt.plist = NULL;
4731
4732 /* If this is a weak symbol, and there is a real definition, the
4733 processor independent code will have arranged for us to see the
4734 real definition first, and we can just use the same value. */
4735 if (h->u.weakdef != NULL)
4736 {
4737 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4738 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4739 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4740 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4741 if (ELIMINATE_COPY_RELOCS)
4742 h->non_got_ref = h->u.weakdef->non_got_ref;
4743 return TRUE;
4744 }
4745
4746 /* This is a reference to a symbol defined by a dynamic object which
4747 is not a function. */
4748
4749 /* If we are creating a shared library, we must presume that the
4750 only references to the symbol are via the global offset table.
4751 For such cases we need not do anything here; the relocations will
4752 be handled correctly by relocate_section. */
4753 if (info->shared)
4754 return TRUE;
4755
4756 /* If there are no references to this symbol that do not use the
4757 GOT, we don't need to generate a copy reloc. */
4758 if (!h->non_got_ref)
4759 return TRUE;
4760
4761 /* If we didn't find any dynamic relocs in read-only sections, then
4762 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4763 We can't do this if there are any small data relocations. This
4764 doesn't work on VxWorks, where we can not have dynamic
4765 relocations (other than copy and jump slot relocations) in an
4766 executable. */
4767 if (ELIMINATE_COPY_RELOCS
4768 && !ppc_elf_hash_entry (h)->has_sda_refs
4769 && !htab->is_vxworks
4770 && !h->def_regular
4771 && !readonly_dynrelocs (h))
4772 {
4773 h->non_got_ref = 0;
4774 return TRUE;
4775 }
4776
4777 if (h->size == 0)
4778 {
4779 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4780 h->root.root.string);
4781 return TRUE;
4782 }
4783
4784 /* We must allocate the symbol in our .dynbss section, which will
4785 become part of the .bss section of the executable. There will be
4786 an entry for this symbol in the .dynsym section. The dynamic
4787 object will contain position independent code, so all references
4788 from the dynamic object to this symbol will go through the global
4789 offset table. The dynamic linker will use the .dynsym entry to
4790 determine the address it must put in the global offset table, so
4791 both the dynamic object and the regular object will refer to the
4792 same memory location for the variable.
4793
4794 Of course, if the symbol is referenced using SDAREL relocs, we
4795 must instead allocate it in .sbss. */
4796
4797 if (ppc_elf_hash_entry (h)->has_sda_refs)
4798 s = htab->dynsbss;
4799 else
4800 s = htab->dynbss;
4801 BFD_ASSERT (s != NULL);
4802
4803 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4804 copy the initial value out of the dynamic object and into the
4805 runtime process image. We need to remember the offset into the
4806 .rela.bss section we are going to use. */
4807 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4808 {
4809 asection *srel;
4810
4811 if (ppc_elf_hash_entry (h)->has_sda_refs)
4812 srel = htab->relsbss;
4813 else
4814 srel = htab->relbss;
4815 BFD_ASSERT (srel != NULL);
4816 srel->size += sizeof (Elf32_External_Rela);
4817 h->needs_copy = 1;
4818 }
4819
4820 return _bfd_elf_adjust_dynamic_copy (h, s);
4821 }
4822 \f
4823 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4824 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4825 specifying the addend on the plt relocation. For -fpic code, the sym
4826 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4827 xxxxxxxx.got2.plt_pic32.<callee>. */
4828
4829 static bfd_boolean
4830 add_stub_sym (struct plt_entry *ent,
4831 struct elf_link_hash_entry *h,
4832 struct bfd_link_info *info)
4833 {
4834 struct elf_link_hash_entry *sh;
4835 size_t len1, len2, len3;
4836 char *name;
4837 const char *stub;
4838 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4839
4840 if (info->shared || info->pie)
4841 stub = ".plt_pic32.";
4842 else
4843 stub = ".plt_call32.";
4844
4845 len1 = strlen (h->root.root.string);
4846 len2 = strlen (stub);
4847 len3 = 0;
4848 if (ent->sec)
4849 len3 = strlen (ent->sec->name);
4850 name = bfd_malloc (len1 + len2 + len3 + 9);
4851 if (name == NULL)
4852 return FALSE;
4853 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4854 if (ent->sec)
4855 memcpy (name + 8, ent->sec->name, len3);
4856 memcpy (name + 8 + len3, stub, len2);
4857 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4858 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4859 if (sh == NULL)
4860 return FALSE;
4861 if (sh->root.type == bfd_link_hash_new)
4862 {
4863 sh->root.type = bfd_link_hash_defined;
4864 sh->root.u.def.section = htab->glink;
4865 sh->root.u.def.value = ent->glink_offset;
4866 sh->ref_regular = 1;
4867 sh->def_regular = 1;
4868 sh->ref_regular_nonweak = 1;
4869 sh->forced_local = 1;
4870 sh->non_elf = 0;
4871 }
4872 return TRUE;
4873 }
4874
4875 /* Allocate NEED contiguous space in .got, and return the offset.
4876 Handles allocation of the got header when crossing 32k. */
4877
4878 static bfd_vma
4879 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4880 {
4881 bfd_vma where;
4882 unsigned int max_before_header;
4883
4884 if (htab->plt_type == PLT_VXWORKS)
4885 {
4886 where = htab->got->size;
4887 htab->got->size += need;
4888 }
4889 else
4890 {
4891 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4892 if (need <= htab->got_gap)
4893 {
4894 where = max_before_header - htab->got_gap;
4895 htab->got_gap -= need;
4896 }
4897 else
4898 {
4899 if (htab->got->size + need > max_before_header
4900 && htab->got->size <= max_before_header)
4901 {
4902 htab->got_gap = max_before_header - htab->got->size;
4903 htab->got->size = max_before_header + htab->got_header_size;
4904 }
4905 where = htab->got->size;
4906 htab->got->size += need;
4907 }
4908 }
4909 return where;
4910 }
4911
4912 /* Allocate space in associated reloc sections for dynamic relocs. */
4913
4914 static bfd_boolean
4915 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4916 {
4917 struct bfd_link_info *info = inf;
4918 struct ppc_elf_link_hash_entry *eh;
4919 struct ppc_elf_link_hash_table *htab;
4920 struct ppc_elf_dyn_relocs *p;
4921
4922 if (h->root.type == bfd_link_hash_indirect)
4923 return TRUE;
4924
4925 if (h->root.type == bfd_link_hash_warning)
4926 /* When warning symbols are created, they **replace** the "real"
4927 entry in the hash table, thus we never get to see the real
4928 symbol in a hash traversal. So look at it now. */
4929 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4930
4931 htab = ppc_elf_hash_table (info);
4932 if (htab->elf.dynamic_sections_created)
4933 {
4934 struct plt_entry *ent;
4935 bfd_boolean doneone = FALSE;
4936 bfd_vma plt_offset = 0, glink_offset = 0;
4937
4938 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4939 if (ent->plt.refcount > 0)
4940 {
4941 /* Make sure this symbol is output as a dynamic symbol. */
4942 if (h->dynindx == -1
4943 && !h->forced_local)
4944 {
4945 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4946 return FALSE;
4947 }
4948
4949 if (info->shared
4950 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4951 {
4952 asection *s = htab->plt;
4953
4954 if (htab->plt_type == PLT_NEW)
4955 {
4956 if (!doneone)
4957 {
4958 plt_offset = s->size;
4959 s->size += 4;
4960 }
4961 ent->plt.offset = plt_offset;
4962
4963 s = htab->glink;
4964 if (!doneone || info->shared || info->pie)
4965 {
4966 glink_offset = s->size;
4967 s->size += GLINK_ENTRY_SIZE;
4968 }
4969 if (!doneone
4970 && !info->shared
4971 && h->def_dynamic
4972 && !h->def_regular)
4973 {
4974 h->root.u.def.section = s;
4975 h->root.u.def.value = glink_offset;
4976 }
4977 ent->glink_offset = glink_offset;
4978
4979 if (htab->emit_stub_syms
4980 && !add_stub_sym (ent, h, info))
4981 return FALSE;
4982 }
4983 else
4984 {
4985 if (!doneone)
4986 {
4987 /* If this is the first .plt entry, make room
4988 for the special first entry. */
4989 if (s->size == 0)
4990 s->size += htab->plt_initial_entry_size;
4991
4992 /* The PowerPC PLT is actually composed of two
4993 parts, the first part is 2 words (for a load
4994 and a jump), and then there is a remaining
4995 word available at the end. */
4996 plt_offset = (htab->plt_initial_entry_size
4997 + (htab->plt_slot_size
4998 * ((s->size
4999 - htab->plt_initial_entry_size)
5000 / htab->plt_entry_size)));
5001
5002 /* If this symbol is not defined in a regular
5003 file, and we are not generating a shared
5004 library, then set the symbol to this location
5005 in the .plt. This is required to make
5006 function pointers compare as equal between
5007 the normal executable and the shared library. */
5008 if (! info->shared
5009 && h->def_dynamic
5010 && !h->def_regular)
5011 {
5012 h->root.u.def.section = s;
5013 h->root.u.def.value = plt_offset;
5014 }
5015
5016 /* Make room for this entry. */
5017 s->size += htab->plt_entry_size;
5018 /* After the 8192nd entry, room for two entries
5019 is allocated. */
5020 if (htab->plt_type == PLT_OLD
5021 && (s->size - htab->plt_initial_entry_size)
5022 / htab->plt_entry_size
5023 > PLT_NUM_SINGLE_ENTRIES)
5024 s->size += htab->plt_entry_size;
5025 }
5026 ent->plt.offset = plt_offset;
5027 }
5028
5029 /* We also need to make an entry in the .rela.plt section. */
5030 if (!doneone)
5031 {
5032 htab->relplt->size += sizeof (Elf32_External_Rela);
5033
5034 if (htab->plt_type == PLT_VXWORKS)
5035 {
5036 /* Allocate space for the unloaded relocations. */
5037 if (!info->shared)
5038 {
5039 if (ent->plt.offset
5040 == (bfd_vma) htab->plt_initial_entry_size)
5041 {
5042 htab->srelplt2->size
5043 += sizeof (Elf32_External_Rela)
5044 * VXWORKS_PLTRESOLVE_RELOCS;
5045 }
5046
5047 htab->srelplt2->size
5048 += sizeof (Elf32_External_Rela)
5049 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
5050 }
5051
5052 /* Every PLT entry has an associated GOT entry in
5053 .got.plt. */
5054 htab->sgotplt->size += 4;
5055 }
5056 doneone = TRUE;
5057 }
5058 }
5059 else
5060 ent->plt.offset = (bfd_vma) -1;
5061 }
5062 else
5063 ent->plt.offset = (bfd_vma) -1;
5064
5065 if (!doneone)
5066 {
5067 h->plt.plist = NULL;
5068 h->needs_plt = 0;
5069 }
5070 }
5071 else
5072 {
5073 h->plt.plist = NULL;
5074 h->needs_plt = 0;
5075 }
5076
5077 eh = (struct ppc_elf_link_hash_entry *) h;
5078 if (eh->elf.got.refcount > 0)
5079 {
5080 bfd_boolean dyn;
5081 unsigned int need;
5082
5083 /* Make sure this symbol is output as a dynamic symbol. */
5084 if (eh->elf.dynindx == -1
5085 && !eh->elf.forced_local
5086 && htab->elf.dynamic_sections_created)
5087 {
5088 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5089 return FALSE;
5090 }
5091
5092 need = 0;
5093 if ((eh->tls_mask & TLS_TLS) != 0)
5094 {
5095 if ((eh->tls_mask & TLS_LD) != 0)
5096 {
5097 if (!eh->elf.def_dynamic)
5098 /* We'll just use htab->tlsld_got.offset. This should
5099 always be the case. It's a little odd if we have
5100 a local dynamic reloc against a non-local symbol. */
5101 htab->tlsld_got.refcount += 1;
5102 else
5103 need += 8;
5104 }
5105 if ((eh->tls_mask & TLS_GD) != 0)
5106 need += 8;
5107 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5108 need += 4;
5109 if ((eh->tls_mask & TLS_DTPREL) != 0)
5110 need += 4;
5111 }
5112 else
5113 need += 4;
5114 if (need == 0)
5115 eh->elf.got.offset = (bfd_vma) -1;
5116 else
5117 {
5118 eh->elf.got.offset = allocate_got (htab, need);
5119 dyn = htab->elf.dynamic_sections_created;
5120 if ((info->shared
5121 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5122 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5123 || eh->elf.root.type != bfd_link_hash_undefweak))
5124 {
5125 /* All the entries we allocated need relocs.
5126 Except LD only needs one. */
5127 if ((eh->tls_mask & TLS_LD) != 0
5128 && eh->elf.def_dynamic)
5129 need -= 4;
5130 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
5131 }
5132 }
5133 }
5134 else
5135 eh->elf.got.offset = (bfd_vma) -1;
5136
5137 if (eh->dyn_relocs == NULL
5138 || !htab->elf.dynamic_sections_created)
5139 return TRUE;
5140
5141 /* In the shared -Bsymbolic case, discard space allocated for
5142 dynamic pc-relative relocs against symbols which turn out to be
5143 defined in regular objects. For the normal shared case, discard
5144 space for relocs that have become local due to symbol visibility
5145 changes. */
5146
5147 if (info->shared)
5148 {
5149 /* Relocs that use pc_count are those that appear on a call insn,
5150 or certain REL relocs (see must_be_dyn_reloc) that can be
5151 generated via assembly. We want calls to protected symbols to
5152 resolve directly to the function rather than going via the plt.
5153 If people want function pointer comparisons to work as expected
5154 then they should avoid writing weird assembly. */
5155 if (SYMBOL_CALLS_LOCAL (info, h))
5156 {
5157 struct ppc_elf_dyn_relocs **pp;
5158
5159 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5160 {
5161 p->count -= p->pc_count;
5162 p->pc_count = 0;
5163 if (p->count == 0)
5164 *pp = p->next;
5165 else
5166 pp = &p->next;
5167 }
5168 }
5169
5170 if (htab->is_vxworks)
5171 {
5172 struct ppc_elf_dyn_relocs **pp;
5173
5174 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5175 {
5176 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5177 *pp = p->next;
5178 else
5179 pp = &p->next;
5180 }
5181 }
5182
5183 /* Discard relocs on undefined symbols that must be local. */
5184 if (eh->dyn_relocs != NULL
5185 && h->root.type == bfd_link_hash_undefined
5186 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5187 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5188 eh->dyn_relocs = NULL;
5189
5190 /* Also discard relocs on undefined weak syms with non-default
5191 visibility. */
5192 if (eh->dyn_relocs != NULL
5193 && h->root.type == bfd_link_hash_undefweak)
5194 {
5195 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5196 eh->dyn_relocs = NULL;
5197
5198 /* Make sure undefined weak symbols are output as a dynamic
5199 symbol in PIEs. */
5200 else if (h->dynindx == -1
5201 && !h->forced_local)
5202 {
5203 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5204 return FALSE;
5205 }
5206 }
5207 }
5208 else if (ELIMINATE_COPY_RELOCS)
5209 {
5210 /* For the non-shared case, discard space for relocs against
5211 symbols which turn out to need copy relocs or are not
5212 dynamic. */
5213
5214 if (!h->non_got_ref
5215 && !h->def_regular)
5216 {
5217 /* Make sure this symbol is output as a dynamic symbol.
5218 Undefined weak syms won't yet be marked as dynamic. */
5219 if (h->dynindx == -1
5220 && !h->forced_local)
5221 {
5222 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5223 return FALSE;
5224 }
5225
5226 /* If that succeeded, we know we'll be keeping all the
5227 relocs. */
5228 if (h->dynindx != -1)
5229 goto keep;
5230 }
5231
5232 eh->dyn_relocs = NULL;
5233
5234 keep: ;
5235 }
5236
5237 /* Finally, allocate space. */
5238 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5239 {
5240 asection *sreloc = elf_section_data (p->sec)->sreloc;
5241 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5242 }
5243
5244 return TRUE;
5245 }
5246
5247 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5248 read-only sections. */
5249
5250 static bfd_boolean
5251 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5252 {
5253 if (h->root.type == bfd_link_hash_indirect)
5254 return TRUE;
5255
5256 if (h->root.type == bfd_link_hash_warning)
5257 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5258
5259 if (readonly_dynrelocs (h))
5260 {
5261 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5262
5263 /* Not an error, just cut short the traversal. */
5264 return FALSE;
5265 }
5266 return TRUE;
5267 }
5268
5269 /* Set the sizes of the dynamic sections. */
5270
5271 static bfd_boolean
5272 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5273 struct bfd_link_info *info)
5274 {
5275 struct ppc_elf_link_hash_table *htab;
5276 asection *s;
5277 bfd_boolean relocs;
5278 bfd *ibfd;
5279
5280 #ifdef DEBUG
5281 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5282 #endif
5283
5284 htab = ppc_elf_hash_table (info);
5285 BFD_ASSERT (htab->elf.dynobj != NULL);
5286
5287 if (elf_hash_table (info)->dynamic_sections_created)
5288 {
5289 /* Set the contents of the .interp section to the interpreter. */
5290 if (info->executable)
5291 {
5292 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5293 BFD_ASSERT (s != NULL);
5294 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5295 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5296 }
5297 }
5298
5299 if (htab->plt_type == PLT_OLD)
5300 htab->got_header_size = 16;
5301 else if (htab->plt_type == PLT_NEW)
5302 htab->got_header_size = 12;
5303
5304 /* Set up .got offsets for local syms, and space for local dynamic
5305 relocs. */
5306 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5307 {
5308 bfd_signed_vma *local_got;
5309 bfd_signed_vma *end_local_got;
5310 char *lgot_masks;
5311 bfd_size_type locsymcount;
5312 Elf_Internal_Shdr *symtab_hdr;
5313
5314 if (!is_ppc_elf (ibfd))
5315 continue;
5316
5317 for (s = ibfd->sections; s != NULL; s = s->next)
5318 {
5319 struct ppc_elf_dyn_relocs *p;
5320
5321 for (p = ((struct ppc_elf_dyn_relocs *)
5322 elf_section_data (s)->local_dynrel);
5323 p != NULL;
5324 p = p->next)
5325 {
5326 if (!bfd_is_abs_section (p->sec)
5327 && bfd_is_abs_section (p->sec->output_section))
5328 {
5329 /* Input section has been discarded, either because
5330 it is a copy of a linkonce section or due to
5331 linker script /DISCARD/, so we'll be discarding
5332 the relocs too. */
5333 }
5334 else if (htab->is_vxworks
5335 && strcmp (p->sec->output_section->name,
5336 ".tls_vars") == 0)
5337 {
5338 /* Relocations in vxworks .tls_vars sections are
5339 handled specially by the loader. */
5340 }
5341 else if (p->count != 0)
5342 {
5343 elf_section_data (p->sec)->sreloc->size
5344 += p->count * sizeof (Elf32_External_Rela);
5345 if ((p->sec->output_section->flags
5346 & (SEC_READONLY | SEC_ALLOC))
5347 == (SEC_READONLY | SEC_ALLOC))
5348 info->flags |= DF_TEXTREL;
5349 }
5350 }
5351 }
5352
5353 local_got = elf_local_got_refcounts (ibfd);
5354 if (!local_got)
5355 continue;
5356
5357 symtab_hdr = &elf_symtab_hdr (ibfd);
5358 locsymcount = symtab_hdr->sh_info;
5359 end_local_got = local_got + locsymcount;
5360 lgot_masks = (char *) end_local_got;
5361 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5362 if (*local_got > 0)
5363 {
5364 unsigned int need = 0;
5365 if ((*lgot_masks & TLS_TLS) != 0)
5366 {
5367 if ((*lgot_masks & TLS_GD) != 0)
5368 need += 8;
5369 if ((*lgot_masks & TLS_LD) != 0)
5370 htab->tlsld_got.refcount += 1;
5371 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5372 need += 4;
5373 if ((*lgot_masks & TLS_DTPREL) != 0)
5374 need += 4;
5375 }
5376 else
5377 need += 4;
5378 if (need == 0)
5379 *local_got = (bfd_vma) -1;
5380 else
5381 {
5382 *local_got = allocate_got (htab, need);
5383 if (info->shared)
5384 htab->relgot->size += (need
5385 * (sizeof (Elf32_External_Rela) / 4));
5386 }
5387 }
5388 else
5389 *local_got = (bfd_vma) -1;
5390 }
5391
5392 /* Allocate space for global sym dynamic relocs. */
5393 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5394
5395 if (htab->tlsld_got.refcount > 0)
5396 {
5397 htab->tlsld_got.offset = allocate_got (htab, 8);
5398 if (info->shared)
5399 htab->relgot->size += sizeof (Elf32_External_Rela);
5400 }
5401 else
5402 htab->tlsld_got.offset = (bfd_vma) -1;
5403
5404 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5405 {
5406 unsigned int g_o_t = 32768;
5407
5408 /* If we haven't allocated the header, do so now. When we get here,
5409 for old plt/got the got size will be 0 to 32764 (not allocated),
5410 or 32780 to 65536 (header allocated). For new plt/got, the
5411 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5412 if (htab->got->size <= 32768)
5413 {
5414 g_o_t = htab->got->size;
5415 if (htab->plt_type == PLT_OLD)
5416 g_o_t += 4;
5417 htab->got->size += htab->got_header_size;
5418 }
5419
5420 htab->elf.hgot->root.u.def.value = g_o_t;
5421 }
5422
5423 if (htab->glink != NULL && htab->glink->size != 0)
5424 {
5425 htab->glink_pltresolve = htab->glink->size;
5426 /* Space for the branch table. */
5427 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5428 /* Pad out to align the start of PLTresolve. */
5429 htab->glink->size += -htab->glink->size & 15;
5430 htab->glink->size += GLINK_PLTRESOLVE;
5431
5432 if (htab->emit_stub_syms)
5433 {
5434 struct elf_link_hash_entry *sh;
5435 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5436 TRUE, FALSE, FALSE);
5437 if (sh == NULL)
5438 return FALSE;
5439 if (sh->root.type == bfd_link_hash_new)
5440 {
5441 sh->root.type = bfd_link_hash_defined;
5442 sh->root.u.def.section = htab->glink;
5443 sh->root.u.def.value = htab->glink_pltresolve;
5444 sh->ref_regular = 1;
5445 sh->def_regular = 1;
5446 sh->ref_regular_nonweak = 1;
5447 sh->forced_local = 1;
5448 sh->non_elf = 0;
5449 }
5450 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5451 TRUE, FALSE, FALSE);
5452 if (sh == NULL)
5453 return FALSE;
5454 if (sh->root.type == bfd_link_hash_new)
5455 {
5456 sh->root.type = bfd_link_hash_defined;
5457 sh->root.u.def.section = htab->glink;
5458 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5459 sh->ref_regular = 1;
5460 sh->def_regular = 1;
5461 sh->ref_regular_nonweak = 1;
5462 sh->forced_local = 1;
5463 sh->non_elf = 0;
5464 }
5465 }
5466 }
5467
5468 /* We've now determined the sizes of the various dynamic sections.
5469 Allocate memory for them. */
5470 relocs = FALSE;
5471 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5472 {
5473 bfd_boolean strip_section = TRUE;
5474
5475 if ((s->flags & SEC_LINKER_CREATED) == 0)
5476 continue;
5477
5478 if (s == htab->plt
5479 || s == htab->glink
5480 || s == htab->got
5481 || s == htab->sgotplt
5482 || s == htab->sbss
5483 || s == htab->dynbss
5484 || s == htab->dynsbss)
5485 {
5486 /* We'd like to strip these sections if they aren't needed, but if
5487 we've exported dynamic symbols from them we must leave them.
5488 It's too late to tell BFD to get rid of the symbols. */
5489 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5490 strip_section = FALSE;
5491 /* Strip this section if we don't need it; see the
5492 comment below. */
5493 }
5494 else if (s == htab->sdata[0].section
5495 || s == htab->sdata[1].section)
5496 {
5497 /* Strip these too. */
5498 }
5499 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5500 {
5501 if (s->size != 0)
5502 {
5503 /* Remember whether there are any relocation sections. */
5504 relocs = TRUE;
5505
5506 /* We use the reloc_count field as a counter if we need
5507 to copy relocs into the output file. */
5508 s->reloc_count = 0;
5509 }
5510 }
5511 else
5512 {
5513 /* It's not one of our sections, so don't allocate space. */
5514 continue;
5515 }
5516
5517 if (s->size == 0 && strip_section)
5518 {
5519 /* If we don't need this section, strip it from the
5520 output file. This is mostly to handle .rela.bss and
5521 .rela.plt. We must create both sections in
5522 create_dynamic_sections, because they must be created
5523 before the linker maps input sections to output
5524 sections. The linker does that before
5525 adjust_dynamic_symbol is called, and it is that
5526 function which decides whether anything needs to go
5527 into these sections. */
5528 s->flags |= SEC_EXCLUDE;
5529 continue;
5530 }
5531
5532 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5533 continue;
5534
5535 /* Allocate memory for the section contents. */
5536 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5537 if (s->contents == NULL)
5538 return FALSE;
5539 }
5540
5541 if (htab->elf.dynamic_sections_created)
5542 {
5543 /* Add some entries to the .dynamic section. We fill in the
5544 values later, in ppc_elf_finish_dynamic_sections, but we
5545 must add the entries now so that we get the correct size for
5546 the .dynamic section. The DT_DEBUG entry is filled in by the
5547 dynamic linker and used by the debugger. */
5548 #define add_dynamic_entry(TAG, VAL) \
5549 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5550
5551 if (info->executable)
5552 {
5553 if (!add_dynamic_entry (DT_DEBUG, 0))
5554 return FALSE;
5555 }
5556
5557 if (htab->plt != NULL && htab->plt->size != 0)
5558 {
5559 if (!add_dynamic_entry (DT_PLTGOT, 0)
5560 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5561 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5562 || !add_dynamic_entry (DT_JMPREL, 0))
5563 return FALSE;
5564 }
5565
5566 if (htab->glink != NULL && htab->glink->size != 0)
5567 {
5568 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5569 return FALSE;
5570 }
5571
5572 if (relocs)
5573 {
5574 if (!add_dynamic_entry (DT_RELA, 0)
5575 || !add_dynamic_entry (DT_RELASZ, 0)
5576 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5577 return FALSE;
5578 }
5579
5580 /* If any dynamic relocs apply to a read-only section, then we
5581 need a DT_TEXTREL entry. */
5582 if ((info->flags & DF_TEXTREL) == 0)
5583 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5584 info);
5585
5586 if ((info->flags & DF_TEXTREL) != 0)
5587 {
5588 if (!add_dynamic_entry (DT_TEXTREL, 0))
5589 return FALSE;
5590 }
5591 if (htab->is_vxworks
5592 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5593 return FALSE;
5594 }
5595 #undef add_dynamic_entry
5596
5597 return TRUE;
5598 }
5599
5600 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5601
5602 static bfd_boolean
5603 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5604 {
5605 if (h->plt.plist != NULL
5606 && !h->def_regular
5607 && (!h->pointer_equality_needed
5608 || !h->ref_regular_nonweak))
5609 return FALSE;
5610
5611 return _bfd_elf_hash_symbol (h);
5612 }
5613 \f
5614 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5615
5616 static const int shared_stub_entry[] =
5617 {
5618 0x7c0802a6, /* mflr 0 */
5619 0x429f0005, /* bcl 20, 31, .Lxxx */
5620 0x7d6802a6, /* mflr 11 */
5621 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5622 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5623 0x7c0803a6, /* mtlr 0 */
5624 0x7d6903a6, /* mtctr 11 */
5625 0x4e800420, /* bctr */
5626 };
5627
5628 static const int stub_entry[] =
5629 {
5630 0x3d600000, /* lis 11,xxx@ha */
5631 0x396b0000, /* addi 11,11,xxx@l */
5632 0x7d6903a6, /* mtctr 11 */
5633 0x4e800420, /* bctr */
5634 };
5635
5636 static bfd_boolean
5637 ppc_elf_relax_section (bfd *abfd,
5638 asection *isec,
5639 struct bfd_link_info *link_info,
5640 bfd_boolean *again)
5641 {
5642 struct one_fixup
5643 {
5644 struct one_fixup *next;
5645 asection *tsec;
5646 bfd_vma toff;
5647 bfd_vma trampoff;
5648 };
5649
5650 Elf_Internal_Shdr *symtab_hdr;
5651 bfd_byte *contents = NULL;
5652 Elf_Internal_Sym *isymbuf = NULL;
5653 Elf_Internal_Rela *internal_relocs = NULL;
5654 Elf_Internal_Rela *irel, *irelend;
5655 struct one_fixup *fixups = NULL;
5656 unsigned changes = 0;
5657 struct ppc_elf_link_hash_table *htab;
5658 bfd_size_type trampoff;
5659 asection *got2;
5660
5661 *again = FALSE;
5662
5663 /* Nothing to do if there are no relocations, and no need to do
5664 anything with non-alloc sections. */
5665 if ((isec->flags & SEC_ALLOC) == 0
5666 || (isec->flags & SEC_RELOC) == 0
5667 || isec->reloc_count == 0)
5668 return TRUE;
5669
5670 /* We cannot represent the required PIC relocs in the output, so don't
5671 do anything. The linker doesn't support mixing -shared and -r
5672 anyway. */
5673 if (link_info->relocatable && link_info->shared)
5674 return TRUE;
5675
5676 trampoff = (isec->size + 3) & (bfd_vma) -4;
5677 /* Space for a branch around any trampolines. */
5678 trampoff += 4;
5679
5680 symtab_hdr = &elf_symtab_hdr (abfd);
5681
5682 /* Get a copy of the native relocations. */
5683 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5684 link_info->keep_memory);
5685 if (internal_relocs == NULL)
5686 goto error_return;
5687
5688 htab = ppc_elf_hash_table (link_info);
5689 got2 = bfd_get_section_by_name (abfd, ".got2");
5690
5691 irelend = internal_relocs + isec->reloc_count;
5692 for (irel = internal_relocs; irel < irelend; irel++)
5693 {
5694 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5695 bfd_vma symaddr, reladdr, toff, roff;
5696 asection *tsec;
5697 struct one_fixup *f;
5698 size_t insn_offset = 0;
5699 bfd_vma max_branch_offset, val;
5700 bfd_byte *hit_addr;
5701 unsigned long t0;
5702 unsigned char sym_type;
5703
5704 switch (r_type)
5705 {
5706 case R_PPC_REL24:
5707 case R_PPC_LOCAL24PC:
5708 case R_PPC_PLTREL24:
5709 max_branch_offset = 1 << 25;
5710 break;
5711
5712 case R_PPC_REL14:
5713 case R_PPC_REL14_BRTAKEN:
5714 case R_PPC_REL14_BRNTAKEN:
5715 max_branch_offset = 1 << 15;
5716 break;
5717
5718 default:
5719 continue;
5720 }
5721
5722 /* Get the value of the symbol referred to by the reloc. */
5723 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5724 {
5725 /* A local symbol. */
5726 Elf_Internal_Sym *isym;
5727
5728 /* Read this BFD's local symbols. */
5729 if (isymbuf == NULL)
5730 {
5731 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5732 if (isymbuf == NULL)
5733 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5734 symtab_hdr->sh_info, 0,
5735 NULL, NULL, NULL);
5736 if (isymbuf == 0)
5737 goto error_return;
5738 }
5739 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5740 if (isym->st_shndx == SHN_UNDEF)
5741 tsec = bfd_und_section_ptr;
5742 else if (isym->st_shndx == SHN_ABS)
5743 tsec = bfd_abs_section_ptr;
5744 else if (isym->st_shndx == SHN_COMMON)
5745 tsec = bfd_com_section_ptr;
5746 else
5747 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5748
5749 toff = isym->st_value;
5750 sym_type = ELF_ST_TYPE (isym->st_info);
5751 }
5752 else
5753 {
5754 /* Global symbol handling. */
5755 unsigned long indx;
5756 struct elf_link_hash_entry *h;
5757
5758 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5759 h = elf_sym_hashes (abfd)[indx];
5760
5761 while (h->root.type == bfd_link_hash_indirect
5762 || h->root.type == bfd_link_hash_warning)
5763 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5764
5765 tsec = NULL;
5766 toff = 0;
5767 if (r_type == R_PPC_PLTREL24
5768 && htab->plt != NULL)
5769 {
5770 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5771
5772 if (ent != NULL)
5773 {
5774 if (htab->plt_type == PLT_NEW)
5775 {
5776 tsec = htab->glink;
5777 toff = ent->glink_offset;
5778 }
5779 else
5780 {
5781 tsec = htab->plt;
5782 toff = ent->plt.offset;
5783 }
5784 }
5785 }
5786 if (tsec != NULL)
5787 ;
5788 else if (h->root.type == bfd_link_hash_defined
5789 || h->root.type == bfd_link_hash_defweak)
5790 {
5791 tsec = h->root.u.def.section;
5792 toff = h->root.u.def.value;
5793 }
5794 else if (h->root.type == bfd_link_hash_undefined
5795 || h->root.type == bfd_link_hash_undefweak)
5796 {
5797 tsec = bfd_und_section_ptr;
5798 toff = 0;
5799 }
5800 else
5801 continue;
5802
5803 sym_type = h->type;
5804 }
5805
5806 /* If the branch and target are in the same section, you have
5807 no hope of adding stubs. We'll error out later should the
5808 branch overflow. */
5809 if (tsec == isec)
5810 continue;
5811
5812 /* There probably isn't any reason to handle symbols in
5813 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5814 attribute for a code section, and we are only looking at
5815 branches. However, implement it correctly here as a
5816 reference for other target relax_section functions. */
5817 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5818 {
5819 /* At this stage in linking, no SEC_MERGE symbol has been
5820 adjusted, so all references to such symbols need to be
5821 passed through _bfd_merged_section_offset. (Later, in
5822 relocate_section, all SEC_MERGE symbols *except* for
5823 section symbols have been adjusted.)
5824
5825 gas may reduce relocations against symbols in SEC_MERGE
5826 sections to a relocation against the section symbol when
5827 the original addend was zero. When the reloc is against
5828 a section symbol we should include the addend in the
5829 offset passed to _bfd_merged_section_offset, since the
5830 location of interest is the original symbol. On the
5831 other hand, an access to "sym+addend" where "sym" is not
5832 a section symbol should not include the addend; Such an
5833 access is presumed to be an offset from "sym"; The
5834 location of interest is just "sym". */
5835 if (sym_type == STT_SECTION)
5836 toff += irel->r_addend;
5837
5838 toff = _bfd_merged_section_offset (abfd, &tsec,
5839 elf_section_data (tsec)->sec_info,
5840 toff);
5841
5842 if (sym_type != STT_SECTION)
5843 toff += irel->r_addend;
5844 }
5845 /* PLTREL24 addends are special. */
5846 else if (r_type != R_PPC_PLTREL24)
5847 toff += irel->r_addend;
5848
5849 /* Attempted -shared link of non-pic code loses. */
5850 if (tsec->output_section == NULL)
5851 continue;
5852
5853 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5854
5855 roff = irel->r_offset;
5856 reladdr = isec->output_section->vma + isec->output_offset + roff;
5857
5858 /* If the branch is in range, no need to do anything. */
5859 if (tsec != bfd_und_section_ptr
5860 && (!link_info->relocatable
5861 /* A relocatable link may have sections moved during
5862 final link, so do not presume they remain in range. */
5863 || tsec->output_section == isec->output_section)
5864 && symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5865 continue;
5866
5867 /* Look for an existing fixup to this address. */
5868 for (f = fixups; f ; f = f->next)
5869 if (f->tsec == tsec && f->toff == toff)
5870 break;
5871
5872 if (f == NULL)
5873 {
5874 size_t size;
5875 unsigned long stub_rtype;
5876
5877 val = trampoff - roff;
5878 if (val >= max_branch_offset)
5879 /* Oh dear, we can't reach a trampoline. Don't try to add
5880 one. We'll report an error later. */
5881 continue;
5882
5883 if (link_info->shared)
5884 {
5885 size = 4 * ARRAY_SIZE (shared_stub_entry);
5886 insn_offset = 12;
5887 stub_rtype = R_PPC_RELAX32PC;
5888 }
5889 else
5890 {
5891 size = 4 * ARRAY_SIZE (stub_entry);
5892 insn_offset = 0;
5893 stub_rtype = R_PPC_RELAX32;
5894 }
5895
5896 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5897 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5898 abort ();
5899 if (tsec == htab->plt
5900 || tsec == htab->glink)
5901 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5902
5903 /* Hijack the old relocation. Since we need two
5904 relocations for this use a "composite" reloc. */
5905 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5906 stub_rtype);
5907 irel->r_offset = trampoff + insn_offset;
5908 if (r_type == R_PPC_PLTREL24)
5909 irel->r_addend = 0;
5910
5911 /* Record the fixup so we don't do it again this section. */
5912 f = bfd_malloc (sizeof (*f));
5913 f->next = fixups;
5914 f->tsec = tsec;
5915 f->toff = toff;
5916 f->trampoff = trampoff;
5917 fixups = f;
5918
5919 trampoff += size;
5920 changes++;
5921 }
5922 else
5923 {
5924 val = f->trampoff - roff;
5925 if (val >= max_branch_offset)
5926 continue;
5927
5928 /* Nop out the reloc, since we're finalizing things here. */
5929 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5930 }
5931
5932 /* Get the section contents. */
5933 if (contents == NULL)
5934 {
5935 /* Get cached copy if it exists. */
5936 if (elf_section_data (isec)->this_hdr.contents != NULL)
5937 contents = elf_section_data (isec)->this_hdr.contents;
5938 else
5939 {
5940 /* Go get them off disk. */
5941 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5942 goto error_return;
5943 }
5944 }
5945
5946 /* Fix up the existing branch to hit the trampoline. */
5947 hit_addr = contents + roff;
5948 switch (r_type)
5949 {
5950 case R_PPC_REL24:
5951 case R_PPC_LOCAL24PC:
5952 case R_PPC_PLTREL24:
5953 t0 = bfd_get_32 (abfd, hit_addr);
5954 t0 &= ~0x3fffffc;
5955 t0 |= val & 0x3fffffc;
5956 bfd_put_32 (abfd, t0, hit_addr);
5957 break;
5958
5959 case R_PPC_REL14:
5960 case R_PPC_REL14_BRTAKEN:
5961 case R_PPC_REL14_BRNTAKEN:
5962 t0 = bfd_get_32 (abfd, hit_addr);
5963 t0 &= ~0xfffc;
5964 t0 |= val & 0xfffc;
5965 bfd_put_32 (abfd, t0, hit_addr);
5966 break;
5967 }
5968 }
5969
5970 /* Write out the trampolines. */
5971 if (fixups != NULL)
5972 {
5973 const int *stub;
5974 bfd_byte *dest;
5975 bfd_vma val;
5976 int i, size;
5977
5978 do
5979 {
5980 struct one_fixup *f = fixups;
5981 fixups = fixups->next;
5982 free (f);
5983 }
5984 while (fixups);
5985
5986 contents = bfd_realloc_or_free (contents, trampoff);
5987 if (contents == NULL)
5988 goto error_return;
5989
5990 isec->size = (isec->size + 3) & (bfd_vma) -4;
5991 /* Branch around the trampolines. */
5992 val = B + trampoff - isec->size;
5993 dest = contents + isec->size;
5994 isec->size = trampoff;
5995 bfd_put_32 (abfd, val, dest);
5996 dest += 4;
5997
5998 if (link_info->shared)
5999 {
6000 stub = shared_stub_entry;
6001 size = ARRAY_SIZE (shared_stub_entry);
6002 }
6003 else
6004 {
6005 stub = stub_entry;
6006 size = ARRAY_SIZE (stub_entry);
6007 }
6008
6009 i = 0;
6010 while (dest < contents + trampoff)
6011 {
6012 bfd_put_32 (abfd, stub[i], dest);
6013 i++;
6014 if (i == size)
6015 i = 0;
6016 dest += 4;
6017 }
6018 BFD_ASSERT (i == 0);
6019 }
6020
6021 if (isymbuf != NULL
6022 && symtab_hdr->contents != (unsigned char *) isymbuf)
6023 {
6024 if (! link_info->keep_memory)
6025 free (isymbuf);
6026 else
6027 {
6028 /* Cache the symbols for elf_link_input_bfd. */
6029 symtab_hdr->contents = (unsigned char *) isymbuf;
6030 }
6031 }
6032
6033 if (contents != NULL
6034 && elf_section_data (isec)->this_hdr.contents != contents)
6035 {
6036 if (!changes && !link_info->keep_memory)
6037 free (contents);
6038 else
6039 {
6040 /* Cache the section contents for elf_link_input_bfd. */
6041 elf_section_data (isec)->this_hdr.contents = contents;
6042 }
6043 }
6044
6045 if (changes != 0)
6046 {
6047 /* Append sufficient NOP relocs so we can write out relocation
6048 information for the trampolines. */
6049 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6050 * sizeof (*new_relocs));
6051 unsigned ix;
6052
6053 if (!new_relocs)
6054 goto error_return;
6055 memcpy (new_relocs, internal_relocs,
6056 isec->reloc_count * sizeof (*new_relocs));
6057 for (ix = changes; ix--;)
6058 {
6059 irel = new_relocs + ix + isec->reloc_count;
6060
6061 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6062 }
6063 if (internal_relocs != elf_section_data (isec)->relocs)
6064 free (internal_relocs);
6065 elf_section_data (isec)->relocs = new_relocs;
6066 isec->reloc_count += changes;
6067 elf_section_data (isec)->rel_hdr.sh_size
6068 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
6069 }
6070 else if (elf_section_data (isec)->relocs != internal_relocs)
6071 free (internal_relocs);
6072
6073 *again = changes != 0;
6074 if (!*again && link_info->relocatable)
6075 {
6076 /* Convert the internal relax relocs to external form. */
6077 for (irel = internal_relocs; irel < irelend; irel++)
6078 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX32)
6079 {
6080 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6081
6082 /* Rewrite the reloc and convert one of the trailing nop
6083 relocs to describe this relocation. */
6084 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6085 /* The relocs are at the bottom 2 bytes */
6086 irel[0].r_offset += 2;
6087 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6088 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6089 irel[1].r_offset += 4;
6090 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6091 irel++;
6092 }
6093 }
6094
6095 return TRUE;
6096
6097 error_return:
6098 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6099 free (isymbuf);
6100 if (contents != NULL
6101 && elf_section_data (isec)->this_hdr.contents != contents)
6102 free (contents);
6103 if (internal_relocs != NULL
6104 && elf_section_data (isec)->relocs != internal_relocs)
6105 free (internal_relocs);
6106 return FALSE;
6107 }
6108 \f
6109 /* What to do when ld finds relocations against symbols defined in
6110 discarded sections. */
6111
6112 static unsigned int
6113 ppc_elf_action_discarded (asection *sec)
6114 {
6115 if (strcmp (".fixup", sec->name) == 0)
6116 return 0;
6117
6118 if (strcmp (".got2", sec->name) == 0)
6119 return 0;
6120
6121 return _bfd_elf_default_action_discarded (sec);
6122 }
6123 \f
6124 /* Fill in the address for a pointer generated in a linker section. */
6125
6126 static bfd_vma
6127 elf_finish_pointer_linker_section (bfd *input_bfd,
6128 elf_linker_section_t *lsect,
6129 struct elf_link_hash_entry *h,
6130 bfd_vma relocation,
6131 const Elf_Internal_Rela *rel)
6132 {
6133 elf_linker_section_pointers_t *linker_section_ptr;
6134
6135 BFD_ASSERT (lsect != NULL);
6136
6137 if (h != NULL)
6138 {
6139 /* Handle global symbol. */
6140 struct ppc_elf_link_hash_entry *eh;
6141
6142 eh = (struct ppc_elf_link_hash_entry *) h;
6143 BFD_ASSERT (eh->elf.def_regular);
6144 linker_section_ptr = eh->linker_section_pointer;
6145 }
6146 else
6147 {
6148 /* Handle local symbol. */
6149 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6150
6151 BFD_ASSERT (is_ppc_elf (input_bfd));
6152 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6153 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6154 }
6155
6156 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6157 rel->r_addend,
6158 lsect);
6159 BFD_ASSERT (linker_section_ptr != NULL);
6160
6161 /* Offset will always be a multiple of four, so use the bottom bit
6162 as a "written" flag. */
6163 if ((linker_section_ptr->offset & 1) == 0)
6164 {
6165 bfd_put_32 (lsect->section->owner,
6166 relocation + linker_section_ptr->addend,
6167 lsect->section->contents + linker_section_ptr->offset);
6168 linker_section_ptr->offset += 1;
6169 }
6170
6171 relocation = (lsect->section->output_offset
6172 + linker_section_ptr->offset - 1
6173 - 0x8000);
6174
6175 #ifdef DEBUG
6176 fprintf (stderr,
6177 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6178 lsect->name, (long) relocation, (long) relocation);
6179 #endif
6180
6181 /* Subtract out the addend, because it will get added back in by the normal
6182 processing. */
6183 return relocation - linker_section_ptr->addend;
6184 }
6185
6186 /* The RELOCATE_SECTION function is called by the ELF backend linker
6187 to handle the relocations for a section.
6188
6189 The relocs are always passed as Rela structures; if the section
6190 actually uses Rel structures, the r_addend field will always be
6191 zero.
6192
6193 This function is responsible for adjust the section contents as
6194 necessary, and (if using Rela relocs and generating a
6195 relocatable output file) adjusting the reloc addend as
6196 necessary.
6197
6198 This function does not have to worry about setting the reloc
6199 address or the reloc symbol index.
6200
6201 LOCAL_SYMS is a pointer to the swapped in local symbols.
6202
6203 LOCAL_SECTIONS is an array giving the section in the input file
6204 corresponding to the st_shndx field of each local symbol.
6205
6206 The global hash table entry for the global symbols can be found
6207 via elf_sym_hashes (input_bfd).
6208
6209 When generating relocatable output, this function must handle
6210 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6211 going to be the section symbol corresponding to the output
6212 section, which means that the addend must be adjusted
6213 accordingly. */
6214
6215 static bfd_boolean
6216 ppc_elf_relocate_section (bfd *output_bfd,
6217 struct bfd_link_info *info,
6218 bfd *input_bfd,
6219 asection *input_section,
6220 bfd_byte *contents,
6221 Elf_Internal_Rela *relocs,
6222 Elf_Internal_Sym *local_syms,
6223 asection **local_sections)
6224 {
6225 Elf_Internal_Shdr *symtab_hdr;
6226 struct elf_link_hash_entry **sym_hashes;
6227 struct ppc_elf_link_hash_table *htab;
6228 Elf_Internal_Rela *rel;
6229 Elf_Internal_Rela *relend;
6230 Elf_Internal_Rela outrel;
6231 bfd_byte *loc;
6232 asection *got2, *sreloc = NULL;
6233 bfd_vma *local_got_offsets;
6234 bfd_boolean ret = TRUE;
6235 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6236 bfd_boolean is_vxworks_tls;
6237
6238 #ifdef DEBUG
6239 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6240 "%ld relocations%s",
6241 input_bfd, input_section,
6242 (long) input_section->reloc_count,
6243 (info->relocatable) ? " (relocatable)" : "");
6244 #endif
6245
6246 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6247
6248 /* Initialize howto table if not already done. */
6249 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6250 ppc_elf_howto_init ();
6251
6252 htab = ppc_elf_hash_table (info);
6253 local_got_offsets = elf_local_got_offsets (input_bfd);
6254 symtab_hdr = &elf_symtab_hdr (input_bfd);
6255 sym_hashes = elf_sym_hashes (input_bfd);
6256 /* We have to handle relocations in vxworks .tls_vars sections
6257 specially, because the dynamic loader is 'weird'. */
6258 is_vxworks_tls = (htab->is_vxworks && info->shared
6259 && !strcmp (input_section->output_section->name,
6260 ".tls_vars"));
6261 rel = relocs;
6262 relend = relocs + input_section->reloc_count;
6263 for (; rel < relend; rel++)
6264 {
6265 enum elf_ppc_reloc_type r_type;
6266 bfd_vma addend;
6267 bfd_reloc_status_type r;
6268 Elf_Internal_Sym *sym;
6269 asection *sec;
6270 struct elf_link_hash_entry *h;
6271 const char *sym_name;
6272 reloc_howto_type *howto;
6273 unsigned long r_symndx;
6274 bfd_vma relocation;
6275 bfd_vma branch_bit, insn, from;
6276 bfd_boolean unresolved_reloc;
6277 bfd_boolean warned;
6278 unsigned int tls_type, tls_mask, tls_gd;
6279
6280 r_type = ELF32_R_TYPE (rel->r_info);
6281 sym = NULL;
6282 sec = NULL;
6283 h = NULL;
6284 unresolved_reloc = FALSE;
6285 warned = FALSE;
6286 r_symndx = ELF32_R_SYM (rel->r_info);
6287
6288 if (r_symndx < symtab_hdr->sh_info)
6289 {
6290 sym = local_syms + r_symndx;
6291 sec = local_sections[r_symndx];
6292 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6293
6294 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6295 }
6296 else
6297 {
6298 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6299 r_symndx, symtab_hdr, sym_hashes,
6300 h, sec, relocation,
6301 unresolved_reloc, warned);
6302
6303 sym_name = h->root.root.string;
6304 }
6305
6306 if (sec != NULL && elf_discarded_section (sec))
6307 {
6308 /* For relocs against symbols from removed linkonce sections,
6309 or sections discarded by a linker script, we just want the
6310 section contents zeroed. Avoid any special processing. */
6311 howto = NULL;
6312 if (r_type < R_PPC_max)
6313 howto = ppc_elf_howto_table[r_type];
6314 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6315 rel->r_info = 0;
6316 rel->r_addend = 0;
6317 continue;
6318 }
6319
6320 if (info->relocatable)
6321 {
6322 if (got2 != NULL
6323 && r_type == R_PPC_PLTREL24
6324 && rel->r_addend >= 32768)
6325 {
6326 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6327 addend specifies the GOT pointer offset within .got2. */
6328 rel->r_addend += got2->output_offset;
6329 }
6330 continue;
6331 }
6332
6333 /* TLS optimizations. Replace instruction sequences and relocs
6334 based on information we collected in tls_optimize. We edit
6335 RELOCS so that --emit-relocs will output something sensible
6336 for the final instruction stream. */
6337 tls_mask = 0;
6338 tls_gd = 0;
6339 if (h != NULL)
6340 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6341 else if (local_got_offsets != NULL)
6342 {
6343 char *lgot_masks;
6344 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
6345 tls_mask = lgot_masks[r_symndx];
6346 }
6347
6348 /* Ensure reloc mapping code below stays sane. */
6349 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6350 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6351 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6352 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6353 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6354 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6355 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6356 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6357 abort ();
6358 switch (r_type)
6359 {
6360 default:
6361 break;
6362
6363 case R_PPC_GOT_TPREL16:
6364 case R_PPC_GOT_TPREL16_LO:
6365 if (tls_mask != 0
6366 && (tls_mask & TLS_TPREL) == 0)
6367 {
6368 bfd_vma insn;
6369 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6370 insn &= 31 << 21;
6371 insn |= 0x3c020000; /* addis 0,2,0 */
6372 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6373 r_type = R_PPC_TPREL16_HA;
6374 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6375 }
6376 break;
6377
6378 case R_PPC_TLS:
6379 if (tls_mask != 0
6380 && (tls_mask & TLS_TPREL) == 0)
6381 {
6382 bfd_vma insn, rtra;
6383 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6384 if ((insn & ((31 << 26) | (31 << 11)))
6385 == ((31 << 26) | (2 << 11)))
6386 rtra = insn & ((1 << 26) - (1 << 16));
6387 else if ((insn & ((31 << 26) | (31 << 16)))
6388 == ((31 << 26) | (2 << 16)))
6389 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6390 else
6391 abort ();
6392 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6393 /* add -> addi. */
6394 insn = 14 << 26;
6395 else if ((insn & (31 << 1)) == 23 << 1
6396 && ((insn & (31 << 6)) < 14 << 6
6397 || ((insn & (31 << 6)) >= 16 << 6
6398 && (insn & (31 << 6)) < 24 << 6)))
6399 /* load and store indexed -> dform. */
6400 insn = (32 | ((insn >> 6) & 31)) << 26;
6401 else if ((insn & (31 << 1)) == 21 << 1
6402 && (insn & (0x1a << 6)) == 0)
6403 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6404 insn = (((58 | ((insn >> 6) & 4)) << 26)
6405 | ((insn >> 6) & 1));
6406 else if ((insn & (31 << 1)) == 21 << 1
6407 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6408 /* lwax -> lwa. */
6409 insn = (58 << 26) | 2;
6410 else
6411 abort ();
6412 insn |= rtra;
6413 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6414 r_type = R_PPC_TPREL16_LO;
6415 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6416
6417 /* Was PPC_TLS which sits on insn boundary, now
6418 PPC_TPREL16_LO which is at low-order half-word. */
6419 rel->r_offset += d_offset;
6420 }
6421 break;
6422
6423 case R_PPC_GOT_TLSGD16_HI:
6424 case R_PPC_GOT_TLSGD16_HA:
6425 tls_gd = TLS_TPRELGD;
6426 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6427 goto tls_gdld_hi;
6428 break;
6429
6430 case R_PPC_GOT_TLSLD16_HI:
6431 case R_PPC_GOT_TLSLD16_HA:
6432 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6433 {
6434 tls_gdld_hi:
6435 if ((tls_mask & tls_gd) != 0)
6436 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6437 + R_PPC_GOT_TPREL16);
6438 else
6439 {
6440 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6441 rel->r_offset -= d_offset;
6442 r_type = R_PPC_NONE;
6443 }
6444 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6445 }
6446 break;
6447
6448 case R_PPC_GOT_TLSGD16:
6449 case R_PPC_GOT_TLSGD16_LO:
6450 tls_gd = TLS_TPRELGD;
6451 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6452 goto tls_ldgd_opt;
6453 break;
6454
6455 case R_PPC_GOT_TLSLD16:
6456 case R_PPC_GOT_TLSLD16_LO:
6457 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6458 {
6459 unsigned int insn1, insn2;
6460 bfd_vma offset;
6461
6462 tls_ldgd_opt:
6463 offset = (bfd_vma) -1;
6464 /* If not using the newer R_PPC_TLSGD/LD to mark
6465 __tls_get_addr calls, we must trust that the call
6466 stays with its arg setup insns, ie. that the next
6467 reloc is the __tls_get_addr call associated with
6468 the current reloc. Edit both insns. */
6469 if (input_section->has_tls_get_addr_call
6470 && rel + 1 < relend
6471 && branch_reloc_hash_match (input_bfd, rel + 1,
6472 htab->tls_get_addr))
6473 offset = rel[1].r_offset;
6474 if ((tls_mask & tls_gd) != 0)
6475 {
6476 /* IE */
6477 insn1 = bfd_get_32 (output_bfd,
6478 contents + rel->r_offset - d_offset);
6479 insn1 &= (1 << 26) - 1;
6480 insn1 |= 32 << 26; /* lwz */
6481 if (offset != (bfd_vma) -1)
6482 {
6483 rel[1].r_info
6484 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6485 R_PPC_NONE);
6486 insn2 = 0x7c631214; /* add 3,3,2 */
6487 bfd_put_32 (output_bfd, insn2, contents + offset);
6488 }
6489 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6490 + R_PPC_GOT_TPREL16);
6491 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6492 }
6493 else
6494 {
6495 /* LE */
6496 insn1 = 0x3c620000; /* addis 3,2,0 */
6497 if (tls_gd == 0)
6498 {
6499 /* Was an LD reloc. */
6500 for (r_symndx = 0;
6501 r_symndx < symtab_hdr->sh_info;
6502 r_symndx++)
6503 if (local_sections[r_symndx] == sec)
6504 break;
6505 if (r_symndx >= symtab_hdr->sh_info)
6506 r_symndx = 0;
6507 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6508 if (r_symndx != 0)
6509 rel->r_addend -= (local_syms[r_symndx].st_value
6510 + sec->output_offset
6511 + sec->output_section->vma);
6512 }
6513 r_type = R_PPC_TPREL16_HA;
6514 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6515 if (offset != (bfd_vma) -1)
6516 {
6517 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6518 rel[1].r_offset = offset + d_offset;
6519 rel[1].r_addend = rel->r_addend;
6520 insn2 = 0x38630000; /* addi 3,3,0 */
6521 bfd_put_32 (output_bfd, insn2, contents + offset);
6522 }
6523 }
6524 bfd_put_32 (output_bfd, insn1,
6525 contents + rel->r_offset - d_offset);
6526 if (tls_gd == 0)
6527 {
6528 /* We changed the symbol on an LD reloc. Start over
6529 in order to get h, sym, sec etc. right. */
6530 rel--;
6531 continue;
6532 }
6533 }
6534 break;
6535
6536 case R_PPC_TLSGD:
6537 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6538 {
6539 unsigned int insn2;
6540 bfd_vma offset = rel->r_offset;
6541
6542 if ((tls_mask & TLS_TPRELGD) != 0)
6543 {
6544 /* IE */
6545 r_type = R_PPC_NONE;
6546 insn2 = 0x7c631214; /* add 3,3,2 */
6547 }
6548 else
6549 {
6550 /* LE */
6551 r_type = R_PPC_TPREL16_LO;
6552 rel->r_offset += d_offset;
6553 insn2 = 0x38630000; /* addi 3,3,0 */
6554 }
6555 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6556 bfd_put_32 (output_bfd, insn2, contents + offset);
6557 /* Zap the reloc on the _tls_get_addr call too. */
6558 BFD_ASSERT (offset == rel[1].r_offset);
6559 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6560 R_PPC_NONE);
6561 }
6562 break;
6563
6564 case R_PPC_TLSLD:
6565 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6566 {
6567 unsigned int insn2;
6568
6569 for (r_symndx = 0;
6570 r_symndx < symtab_hdr->sh_info;
6571 r_symndx++)
6572 if (local_sections[r_symndx] == sec)
6573 break;
6574 if (r_symndx >= symtab_hdr->sh_info)
6575 r_symndx = 0;
6576 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6577 if (r_symndx != 0)
6578 rel->r_addend -= (local_syms[r_symndx].st_value
6579 + sec->output_offset
6580 + sec->output_section->vma);
6581
6582 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6583 rel->r_offset += d_offset;
6584 insn2 = 0x38630000; /* addi 3,3,0 */
6585 bfd_put_32 (output_bfd, insn2,
6586 contents + rel->r_offset - d_offset);
6587 /* Zap the reloc on the _tls_get_addr call too. */
6588 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
6589 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6590 R_PPC_NONE);
6591 rel--;
6592 continue;
6593 }
6594 break;
6595 }
6596
6597 /* Handle other relocations that tweak non-addend part of insn. */
6598 branch_bit = 0;
6599 switch (r_type)
6600 {
6601 default:
6602 break;
6603
6604 /* Branch taken prediction relocations. */
6605 case R_PPC_ADDR14_BRTAKEN:
6606 case R_PPC_REL14_BRTAKEN:
6607 branch_bit = BRANCH_PREDICT_BIT;
6608 /* Fall thru */
6609
6610 /* Branch not taken prediction relocations. */
6611 case R_PPC_ADDR14_BRNTAKEN:
6612 case R_PPC_REL14_BRNTAKEN:
6613 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6614 insn &= ~BRANCH_PREDICT_BIT;
6615 insn |= branch_bit;
6616
6617 from = (rel->r_offset
6618 + input_section->output_offset
6619 + input_section->output_section->vma);
6620
6621 /* Invert 'y' bit if not the default. */
6622 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6623 insn ^= BRANCH_PREDICT_BIT;
6624
6625 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6626 break;
6627 }
6628
6629 addend = rel->r_addend;
6630 tls_type = 0;
6631 howto = NULL;
6632 if (r_type < R_PPC_max)
6633 howto = ppc_elf_howto_table[r_type];
6634 switch (r_type)
6635 {
6636 default:
6637 (*_bfd_error_handler)
6638 (_("%B: unknown relocation type %d for symbol %s"),
6639 input_bfd, (int) r_type, sym_name);
6640
6641 bfd_set_error (bfd_error_bad_value);
6642 ret = FALSE;
6643 continue;
6644
6645 case R_PPC_NONE:
6646 case R_PPC_TLS:
6647 case R_PPC_TLSGD:
6648 case R_PPC_TLSLD:
6649 case R_PPC_EMB_MRKREF:
6650 case R_PPC_GNU_VTINHERIT:
6651 case R_PPC_GNU_VTENTRY:
6652 continue;
6653
6654 /* GOT16 relocations. Like an ADDR16 using the symbol's
6655 address in the GOT as relocation value instead of the
6656 symbol's value itself. Also, create a GOT entry for the
6657 symbol and put the symbol value there. */
6658 case R_PPC_GOT_TLSGD16:
6659 case R_PPC_GOT_TLSGD16_LO:
6660 case R_PPC_GOT_TLSGD16_HI:
6661 case R_PPC_GOT_TLSGD16_HA:
6662 tls_type = TLS_TLS | TLS_GD;
6663 goto dogot;
6664
6665 case R_PPC_GOT_TLSLD16:
6666 case R_PPC_GOT_TLSLD16_LO:
6667 case R_PPC_GOT_TLSLD16_HI:
6668 case R_PPC_GOT_TLSLD16_HA:
6669 tls_type = TLS_TLS | TLS_LD;
6670 goto dogot;
6671
6672 case R_PPC_GOT_TPREL16:
6673 case R_PPC_GOT_TPREL16_LO:
6674 case R_PPC_GOT_TPREL16_HI:
6675 case R_PPC_GOT_TPREL16_HA:
6676 tls_type = TLS_TLS | TLS_TPREL;
6677 goto dogot;
6678
6679 case R_PPC_GOT_DTPREL16:
6680 case R_PPC_GOT_DTPREL16_LO:
6681 case R_PPC_GOT_DTPREL16_HI:
6682 case R_PPC_GOT_DTPREL16_HA:
6683 tls_type = TLS_TLS | TLS_DTPREL;
6684 goto dogot;
6685
6686 case R_PPC_GOT16:
6687 case R_PPC_GOT16_LO:
6688 case R_PPC_GOT16_HI:
6689 case R_PPC_GOT16_HA:
6690 tls_mask = 0;
6691 dogot:
6692 {
6693 /* Relocation is to the entry for this symbol in the global
6694 offset table. */
6695 bfd_vma off;
6696 bfd_vma *offp;
6697 unsigned long indx;
6698
6699 if (htab->got == NULL)
6700 abort ();
6701
6702 indx = 0;
6703 if (tls_type == (TLS_TLS | TLS_LD)
6704 && (h == NULL
6705 || !h->def_dynamic))
6706 offp = &htab->tlsld_got.offset;
6707 else if (h != NULL)
6708 {
6709 bfd_boolean dyn;
6710 dyn = htab->elf.dynamic_sections_created;
6711 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6712 || (info->shared
6713 && SYMBOL_REFERENCES_LOCAL (info, h)))
6714 /* This is actually a static link, or it is a
6715 -Bsymbolic link and the symbol is defined
6716 locally, or the symbol was forced to be local
6717 because of a version file. */
6718 ;
6719 else
6720 {
6721 indx = h->dynindx;
6722 unresolved_reloc = FALSE;
6723 }
6724 offp = &h->got.offset;
6725 }
6726 else
6727 {
6728 if (local_got_offsets == NULL)
6729 abort ();
6730 offp = &local_got_offsets[r_symndx];
6731 }
6732
6733 /* The offset must always be a multiple of 4. We use the
6734 least significant bit to record whether we have already
6735 processed this entry. */
6736 off = *offp;
6737 if ((off & 1) != 0)
6738 off &= ~1;
6739 else
6740 {
6741 unsigned int tls_m = (tls_mask
6742 & (TLS_LD | TLS_GD | TLS_DTPREL
6743 | TLS_TPREL | TLS_TPRELGD));
6744
6745 if (offp == &htab->tlsld_got.offset)
6746 tls_m = TLS_LD;
6747 else if (h == NULL
6748 || !h->def_dynamic)
6749 tls_m &= ~TLS_LD;
6750
6751 /* We might have multiple got entries for this sym.
6752 Initialize them all. */
6753 do
6754 {
6755 int tls_ty = 0;
6756
6757 if ((tls_m & TLS_LD) != 0)
6758 {
6759 tls_ty = TLS_TLS | TLS_LD;
6760 tls_m &= ~TLS_LD;
6761 }
6762 else if ((tls_m & TLS_GD) != 0)
6763 {
6764 tls_ty = TLS_TLS | TLS_GD;
6765 tls_m &= ~TLS_GD;
6766 }
6767 else if ((tls_m & TLS_DTPREL) != 0)
6768 {
6769 tls_ty = TLS_TLS | TLS_DTPREL;
6770 tls_m &= ~TLS_DTPREL;
6771 }
6772 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6773 {
6774 tls_ty = TLS_TLS | TLS_TPREL;
6775 tls_m = 0;
6776 }
6777
6778 /* Generate relocs for the dynamic linker. */
6779 if ((info->shared || indx != 0)
6780 && (offp == &htab->tlsld_got.offset
6781 || h == NULL
6782 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6783 || h->root.type != bfd_link_hash_undefweak))
6784 {
6785 outrel.r_offset = (htab->got->output_section->vma
6786 + htab->got->output_offset
6787 + off);
6788 outrel.r_addend = 0;
6789 if (tls_ty & (TLS_LD | TLS_GD))
6790 {
6791 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6792 if (tls_ty == (TLS_TLS | TLS_GD))
6793 {
6794 loc = htab->relgot->contents;
6795 loc += (htab->relgot->reloc_count++
6796 * sizeof (Elf32_External_Rela));
6797 bfd_elf32_swap_reloca_out (output_bfd,
6798 &outrel, loc);
6799 outrel.r_offset += 4;
6800 outrel.r_info
6801 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6802 }
6803 }
6804 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6805 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6806 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6807 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6808 else if (indx == 0)
6809 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6810 else
6811 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6812 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
6813 {
6814 outrel.r_addend += relocation;
6815 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6816 outrel.r_addend -= htab->elf.tls_sec->vma;
6817 }
6818 loc = htab->relgot->contents;
6819 loc += (htab->relgot->reloc_count++
6820 * sizeof (Elf32_External_Rela));
6821 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6822 }
6823
6824 /* Init the .got section contents if we're not
6825 emitting a reloc. */
6826 else
6827 {
6828 bfd_vma value = relocation;
6829
6830 if (tls_ty == (TLS_TLS | TLS_LD))
6831 value = 1;
6832 else if (tls_ty != 0)
6833 {
6834 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6835 if (tls_ty == (TLS_TLS | TLS_TPREL))
6836 value += DTP_OFFSET - TP_OFFSET;
6837
6838 if (tls_ty == (TLS_TLS | TLS_GD))
6839 {
6840 bfd_put_32 (output_bfd, value,
6841 htab->got->contents + off + 4);
6842 value = 1;
6843 }
6844 }
6845 bfd_put_32 (output_bfd, value,
6846 htab->got->contents + off);
6847 }
6848
6849 off += 4;
6850 if (tls_ty & (TLS_LD | TLS_GD))
6851 off += 4;
6852 }
6853 while (tls_m != 0);
6854
6855 off = *offp;
6856 *offp = off | 1;
6857 }
6858
6859 if (off >= (bfd_vma) -2)
6860 abort ();
6861
6862 if ((tls_type & TLS_TLS) != 0)
6863 {
6864 if (tls_type != (TLS_TLS | TLS_LD))
6865 {
6866 if ((tls_mask & TLS_LD) != 0
6867 && !(h == NULL
6868 || !h->def_dynamic))
6869 off += 8;
6870 if (tls_type != (TLS_TLS | TLS_GD))
6871 {
6872 if ((tls_mask & TLS_GD) != 0)
6873 off += 8;
6874 if (tls_type != (TLS_TLS | TLS_DTPREL))
6875 {
6876 if ((tls_mask & TLS_DTPREL) != 0)
6877 off += 4;
6878 }
6879 }
6880 }
6881 }
6882
6883 relocation = (htab->got->output_section->vma
6884 + htab->got->output_offset
6885 + off
6886 - SYM_VAL (htab->elf.hgot));
6887
6888 /* Addends on got relocations don't make much sense.
6889 x+off@got is actually x@got+off, and since the got is
6890 generated by a hash table traversal, the value in the
6891 got at entry m+n bears little relation to the entry m. */
6892 if (addend != 0)
6893 (*_bfd_error_handler)
6894 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6895 input_bfd,
6896 input_section,
6897 (long) rel->r_offset,
6898 howto->name,
6899 sym_name);
6900 }
6901 break;
6902
6903 /* Relocations that need no special processing. */
6904 case R_PPC_LOCAL24PC:
6905 /* It makes no sense to point a local relocation
6906 at a symbol not in this object. */
6907 if (unresolved_reloc)
6908 {
6909 if (! (*info->callbacks->undefined_symbol) (info,
6910 h->root.root.string,
6911 input_bfd,
6912 input_section,
6913 rel->r_offset,
6914 TRUE))
6915 return FALSE;
6916 continue;
6917 }
6918 break;
6919
6920 case R_PPC_DTPREL16:
6921 case R_PPC_DTPREL16_LO:
6922 case R_PPC_DTPREL16_HI:
6923 case R_PPC_DTPREL16_HA:
6924 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6925 break;
6926
6927 /* Relocations that may need to be propagated if this is a shared
6928 object. */
6929 case R_PPC_TPREL16:
6930 case R_PPC_TPREL16_LO:
6931 case R_PPC_TPREL16_HI:
6932 case R_PPC_TPREL16_HA:
6933 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6934 /* The TPREL16 relocs shouldn't really be used in shared
6935 libs as they will result in DT_TEXTREL being set, but
6936 support them anyway. */
6937 goto dodyn;
6938
6939 case R_PPC_TPREL32:
6940 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6941 goto dodyn;
6942
6943 case R_PPC_DTPREL32:
6944 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6945 goto dodyn;
6946
6947 case R_PPC_DTPMOD32:
6948 relocation = 1;
6949 addend = 0;
6950 goto dodyn;
6951
6952 case R_PPC_REL16:
6953 case R_PPC_REL16_LO:
6954 case R_PPC_REL16_HI:
6955 case R_PPC_REL16_HA:
6956 break;
6957
6958 case R_PPC_REL32:
6959 if (h == NULL || h == htab->elf.hgot)
6960 break;
6961 /* fall through */
6962
6963 case R_PPC_ADDR32:
6964 case R_PPC_ADDR16:
6965 case R_PPC_ADDR16_LO:
6966 case R_PPC_ADDR16_HI:
6967 case R_PPC_ADDR16_HA:
6968 case R_PPC_UADDR32:
6969 case R_PPC_UADDR16:
6970 goto dodyn;
6971
6972 case R_PPC_REL24:
6973 case R_PPC_REL14:
6974 case R_PPC_REL14_BRTAKEN:
6975 case R_PPC_REL14_BRNTAKEN:
6976 /* If these relocations are not to a named symbol, they can be
6977 handled right here, no need to bother the dynamic linker. */
6978 if (SYMBOL_CALLS_LOCAL (info, h)
6979 || h == htab->elf.hgot)
6980 break;
6981 /* fall through */
6982
6983 case R_PPC_ADDR24:
6984 case R_PPC_ADDR14:
6985 case R_PPC_ADDR14_BRTAKEN:
6986 case R_PPC_ADDR14_BRNTAKEN:
6987 if (h != NULL && !info->shared)
6988 break;
6989 /* fall through */
6990
6991 dodyn:
6992 if ((input_section->flags & SEC_ALLOC) == 0
6993 || is_vxworks_tls)
6994 break;
6995
6996 if ((info->shared
6997 && !(h != NULL
6998 && ((h->root.type == bfd_link_hash_undefined
6999 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7000 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7001 || (h->root.type == bfd_link_hash_undefweak
7002 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7003 && (must_be_dyn_reloc (info, r_type)
7004 || !SYMBOL_CALLS_LOCAL (info, h)))
7005 || (ELIMINATE_COPY_RELOCS
7006 && !info->shared
7007 && h != NULL
7008 && h->dynindx != -1
7009 && !h->non_got_ref
7010 && !h->def_regular))
7011 {
7012 int skip;
7013
7014 #ifdef DEBUG
7015 fprintf (stderr, "ppc_elf_relocate_section needs to "
7016 "create relocation for %s\n",
7017 (h && h->root.root.string
7018 ? h->root.root.string : "<unknown>"));
7019 #endif
7020
7021 /* When generating a shared object, these relocations
7022 are copied into the output file to be resolved at run
7023 time. */
7024 if (sreloc == NULL)
7025 {
7026 sreloc = _bfd_elf_get_dynamic_reloc_section
7027 (input_bfd, input_section, /*rela?*/ TRUE);
7028 if (sreloc == NULL)
7029 return FALSE;
7030 }
7031
7032 skip = 0;
7033 outrel.r_offset =
7034 _bfd_elf_section_offset (output_bfd, info, input_section,
7035 rel->r_offset);
7036 if (outrel.r_offset == (bfd_vma) -1
7037 || outrel.r_offset == (bfd_vma) -2)
7038 skip = (int) outrel.r_offset;
7039 outrel.r_offset += (input_section->output_section->vma
7040 + input_section->output_offset);
7041
7042 if (skip)
7043 memset (&outrel, 0, sizeof outrel);
7044 else if ((h != NULL
7045 && (h->root.type == bfd_link_hash_undefined
7046 || h->root.type == bfd_link_hash_undefweak))
7047 || !SYMBOL_REFERENCES_LOCAL (info, h))
7048 {
7049 unresolved_reloc = FALSE;
7050 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7051 outrel.r_addend = rel->r_addend;
7052 }
7053 else
7054 {
7055 outrel.r_addend = relocation + rel->r_addend;
7056
7057 if (r_type == R_PPC_ADDR32)
7058 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7059 else
7060 {
7061 long indx = 0;
7062
7063 if (r_symndx == 0 || bfd_is_abs_section (sec))
7064 ;
7065 else if (sec == NULL || sec->owner == NULL)
7066 {
7067 bfd_set_error (bfd_error_bad_value);
7068 ret = FALSE;
7069 }
7070 else
7071 {
7072 asection *osec;
7073
7074 /* We are turning this relocation into one
7075 against a section symbol. It would be
7076 proper to subtract the symbol's value,
7077 osec->vma, from the emitted reloc addend,
7078 but ld.so expects buggy relocs. */
7079 osec = sec->output_section;
7080 indx = elf_section_data (osec)->dynindx;
7081 if (indx == 0)
7082 {
7083 osec = htab->elf.text_index_section;
7084 indx = elf_section_data (osec)->dynindx;
7085 }
7086 BFD_ASSERT (indx != 0);
7087 #ifdef DEBUG
7088 if (indx == 0)
7089 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7090 indx, osec->name, osec->flags,
7091 h->root.root.string);
7092 #endif
7093 }
7094
7095 outrel.r_info = ELF32_R_INFO (indx, r_type);
7096 }
7097 }
7098
7099 loc = sreloc->contents;
7100 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7101 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7102
7103 if (skip == -1)
7104 continue;
7105
7106 /* This reloc will be computed at runtime. We clear the memory
7107 so that it contains predictable value. */
7108 if (! skip
7109 && ((input_section->flags & SEC_ALLOC) != 0
7110 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7111 {
7112 relocation = howto->pc_relative ? outrel.r_offset : 0;
7113 addend = 0;
7114 break;
7115 }
7116 }
7117 break;
7118
7119 case R_PPC_RELAX32PC_PLT:
7120 case R_PPC_RELAX32_PLT:
7121 {
7122 struct plt_entry *ent = find_plt_ent (h, got2, addend);
7123
7124 if (htab->plt_type == PLT_NEW)
7125 relocation = (htab->glink->output_section->vma
7126 + htab->glink->output_offset
7127 + ent->glink_offset);
7128 else
7129 relocation = (htab->plt->output_section->vma
7130 + htab->plt->output_offset
7131 + ent->plt.offset);
7132 }
7133 if (r_type == R_PPC_RELAX32_PLT)
7134 goto relax32;
7135 /* Fall thru */
7136
7137 case R_PPC_RELAX32PC:
7138 relocation -= (input_section->output_section->vma
7139 + input_section->output_offset
7140 + rel->r_offset - 4);
7141 /* Fall thru */
7142
7143 case R_PPC_RELAX32:
7144 relax32:
7145 {
7146 unsigned long t0;
7147 unsigned long t1;
7148
7149 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7150 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7151
7152 /* We're clearing the bits for R_PPC_ADDR16_HA
7153 and R_PPC_ADDR16_LO here. */
7154 t0 &= ~0xffff;
7155 t1 &= ~0xffff;
7156
7157 /* t0 is HA, t1 is LO */
7158 relocation += addend;
7159 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7160 t1 |= relocation & 0xffff;
7161
7162 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7163 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7164
7165 /* Rewrite the reloc and convert one of the trailing nop
7166 relocs to describe this relocation. */
7167 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7168 /* The relocs are at the bottom 2 bytes */
7169 rel[0].r_offset += 2;
7170 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7171 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7172 rel[1].r_offset += 4;
7173 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7174 rel++;
7175 }
7176 continue;
7177
7178 /* Indirect .sdata relocation. */
7179 case R_PPC_EMB_SDAI16:
7180 BFD_ASSERT (htab->sdata[0].section != NULL);
7181 relocation
7182 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7183 h, relocation, rel);
7184 break;
7185
7186 /* Indirect .sdata2 relocation. */
7187 case R_PPC_EMB_SDA2I16:
7188 BFD_ASSERT (htab->sdata[1].section != NULL);
7189 relocation
7190 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7191 h, relocation, rel);
7192 break;
7193
7194 /* Handle the TOC16 reloc. We want to use the offset within the .got
7195 section, not the actual VMA. This is appropriate when generating
7196 an embedded ELF object, for which the .got section acts like the
7197 AIX .toc section. */
7198 case R_PPC_TOC16: /* phony GOT16 relocations */
7199 if (sec == NULL || sec->output_section == NULL)
7200 {
7201 unresolved_reloc = TRUE;
7202 break;
7203 }
7204 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7205 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7206
7207 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7208 break;
7209
7210 case R_PPC_PLTREL24:
7211 /* Relocation is to the entry for this symbol in the
7212 procedure linkage table. */
7213 {
7214 struct plt_entry *ent = find_plt_ent (h, got2, addend);
7215
7216 addend = 0;
7217 if (ent == NULL
7218 || htab->plt == NULL)
7219 {
7220 /* We didn't make a PLT entry for this symbol. This
7221 happens when statically linking PIC code, or when
7222 using -Bsymbolic. */
7223 break;
7224 }
7225
7226 unresolved_reloc = FALSE;
7227 if (htab->plt_type == PLT_NEW)
7228 relocation = (htab->glink->output_section->vma
7229 + htab->glink->output_offset
7230 + ent->glink_offset);
7231 else
7232 relocation = (htab->plt->output_section->vma
7233 + htab->plt->output_offset
7234 + ent->plt.offset);
7235 }
7236 break;
7237
7238 /* Relocate against _SDA_BASE_. */
7239 case R_PPC_SDAREL16:
7240 {
7241 const char *name;
7242
7243 if (sec == NULL || sec->output_section == NULL)
7244 {
7245 unresolved_reloc = TRUE;
7246 break;
7247 }
7248
7249 name = bfd_get_section_name (abfd, sec->output_section);
7250 if (! ((CONST_STRNEQ (name, ".sdata")
7251 && (name[6] == 0 || name[6] == '.'))
7252 || (CONST_STRNEQ (name, ".sbss")
7253 && (name[5] == 0 || name[5] == '.'))))
7254 {
7255 (*_bfd_error_handler)
7256 (_("%B: the target (%s) of a %s relocation is "
7257 "in the wrong output section (%s)"),
7258 input_bfd,
7259 sym_name,
7260 howto->name,
7261 name);
7262 }
7263 addend -= SYM_VAL (htab->sdata[0].sym);
7264 }
7265 break;
7266
7267 /* Relocate against _SDA2_BASE_. */
7268 case R_PPC_EMB_SDA2REL:
7269 {
7270 const char *name;
7271
7272 if (sec == NULL || sec->output_section == NULL)
7273 {
7274 unresolved_reloc = TRUE;
7275 break;
7276 }
7277
7278 name = bfd_get_section_name (abfd, sec->output_section);
7279 if (! (CONST_STRNEQ (name, ".sdata2")
7280 || CONST_STRNEQ (name, ".sbss2")))
7281 {
7282 (*_bfd_error_handler)
7283 (_("%B: the target (%s) of a %s relocation is "
7284 "in the wrong output section (%s)"),
7285 input_bfd,
7286 sym_name,
7287 howto->name,
7288 name);
7289
7290 bfd_set_error (bfd_error_bad_value);
7291 ret = FALSE;
7292 continue;
7293 }
7294 addend -= SYM_VAL (htab->sdata[1].sym);
7295 }
7296 break;
7297
7298 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7299 case R_PPC_EMB_SDA21:
7300 case R_PPC_EMB_RELSDA:
7301 {
7302 const char *name;
7303 int reg;
7304
7305 if (sec == NULL || sec->output_section == NULL)
7306 {
7307 unresolved_reloc = TRUE;
7308 break;
7309 }
7310
7311 name = bfd_get_section_name (abfd, sec->output_section);
7312 if (((CONST_STRNEQ (name, ".sdata")
7313 && (name[6] == 0 || name[6] == '.'))
7314 || (CONST_STRNEQ (name, ".sbss")
7315 && (name[5] == 0 || name[5] == '.'))))
7316 {
7317 reg = 13;
7318 addend -= SYM_VAL (htab->sdata[0].sym);
7319 }
7320 else if (CONST_STRNEQ (name, ".sdata2")
7321 || CONST_STRNEQ (name, ".sbss2"))
7322 {
7323 reg = 2;
7324 addend -= SYM_VAL (htab->sdata[1].sym);
7325 }
7326 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7327 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7328 {
7329 reg = 0;
7330 }
7331 else
7332 {
7333 (*_bfd_error_handler)
7334 (_("%B: the target (%s) of a %s relocation is "
7335 "in the wrong output section (%s)"),
7336 input_bfd,
7337 sym_name,
7338 howto->name,
7339 name);
7340
7341 bfd_set_error (bfd_error_bad_value);
7342 ret = FALSE;
7343 continue;
7344 }
7345
7346 if (r_type == R_PPC_EMB_SDA21)
7347 { /* fill in register field */
7348 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7349 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7350 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7351 }
7352 }
7353 break;
7354
7355 /* Relocate against the beginning of the section. */
7356 case R_PPC_SECTOFF:
7357 case R_PPC_SECTOFF_LO:
7358 case R_PPC_SECTOFF_HI:
7359 case R_PPC_SECTOFF_HA:
7360 if (sec == NULL || sec->output_section == NULL)
7361 {
7362 unresolved_reloc = TRUE;
7363 break;
7364 }
7365 addend -= sec->output_section->vma;
7366 break;
7367
7368 /* Negative relocations. */
7369 case R_PPC_EMB_NADDR32:
7370 case R_PPC_EMB_NADDR16:
7371 case R_PPC_EMB_NADDR16_LO:
7372 case R_PPC_EMB_NADDR16_HI:
7373 case R_PPC_EMB_NADDR16_HA:
7374 addend -= 2 * relocation;
7375 break;
7376
7377 case R_PPC_COPY:
7378 case R_PPC_GLOB_DAT:
7379 case R_PPC_JMP_SLOT:
7380 case R_PPC_RELATIVE:
7381 case R_PPC_PLT32:
7382 case R_PPC_PLTREL32:
7383 case R_PPC_PLT16_LO:
7384 case R_PPC_PLT16_HI:
7385 case R_PPC_PLT16_HA:
7386 case R_PPC_ADDR30:
7387 case R_PPC_EMB_RELSEC16:
7388 case R_PPC_EMB_RELST_LO:
7389 case R_PPC_EMB_RELST_HI:
7390 case R_PPC_EMB_RELST_HA:
7391 case R_PPC_EMB_BIT_FLD:
7392 (*_bfd_error_handler)
7393 (_("%B: relocation %s is not yet supported for symbol %s."),
7394 input_bfd,
7395 howto->name,
7396 sym_name);
7397
7398 bfd_set_error (bfd_error_invalid_operation);
7399 ret = FALSE;
7400 continue;
7401 }
7402
7403 /* Do any further special processing. */
7404 switch (r_type)
7405 {
7406 default:
7407 break;
7408
7409 case R_PPC_ADDR16_HA:
7410 case R_PPC_REL16_HA:
7411 case R_PPC_SECTOFF_HA:
7412 case R_PPC_TPREL16_HA:
7413 case R_PPC_DTPREL16_HA:
7414 case R_PPC_EMB_NADDR16_HA:
7415 case R_PPC_EMB_RELST_HA:
7416 /* It's just possible that this symbol is a weak symbol
7417 that's not actually defined anywhere. In that case,
7418 'sec' would be NULL, and we should leave the symbol
7419 alone (it will be set to zero elsewhere in the link). */
7420 if (sec == NULL)
7421 break;
7422 /* Fall thru */
7423
7424 case R_PPC_PLT16_HA:
7425 case R_PPC_GOT16_HA:
7426 case R_PPC_GOT_TLSGD16_HA:
7427 case R_PPC_GOT_TLSLD16_HA:
7428 case R_PPC_GOT_TPREL16_HA:
7429 case R_PPC_GOT_DTPREL16_HA:
7430 /* Add 0x10000 if sign bit in 0:15 is set.
7431 Bits 0:15 are not used. */
7432 addend += 0x8000;
7433 break;
7434 }
7435
7436 #ifdef DEBUG
7437 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7438 "offset = %ld, addend = %ld\n",
7439 howto->name,
7440 (int) r_type,
7441 sym_name,
7442 r_symndx,
7443 (long) rel->r_offset,
7444 (long) addend);
7445 #endif
7446
7447 if (unresolved_reloc
7448 && !((input_section->flags & SEC_DEBUGGING) != 0
7449 && h->def_dynamic))
7450 {
7451 (*_bfd_error_handler)
7452 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7453 input_bfd,
7454 input_section,
7455 (long) rel->r_offset,
7456 howto->name,
7457 sym_name);
7458 ret = FALSE;
7459 }
7460
7461 r = _bfd_final_link_relocate (howto,
7462 input_bfd,
7463 input_section,
7464 contents,
7465 rel->r_offset,
7466 relocation,
7467 addend);
7468
7469 if (r != bfd_reloc_ok)
7470 {
7471 if (r == bfd_reloc_overflow)
7472 {
7473 if (warned)
7474 continue;
7475 if (h != NULL
7476 && h->root.type == bfd_link_hash_undefweak
7477 && howto->pc_relative)
7478 {
7479 /* Assume this is a call protected by other code that
7480 detect the symbol is undefined. If this is the case,
7481 we can safely ignore the overflow. If not, the
7482 program is hosed anyway, and a little warning isn't
7483 going to help. */
7484
7485 continue;
7486 }
7487
7488 if (! (*info->callbacks->reloc_overflow) (info,
7489 (h ? &h->root : NULL),
7490 sym_name,
7491 howto->name,
7492 rel->r_addend,
7493 input_bfd,
7494 input_section,
7495 rel->r_offset))
7496 return FALSE;
7497 }
7498 else
7499 {
7500 (*_bfd_error_handler)
7501 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
7502 input_bfd, input_section,
7503 (long) rel->r_offset, howto->name, sym_name, (int) r);
7504 ret = FALSE;
7505 }
7506 }
7507 }
7508
7509 #ifdef DEBUG
7510 fprintf (stderr, "\n");
7511 #endif
7512
7513 return ret;
7514 }
7515 \f
7516 #define PPC_LO(v) ((v) & 0xffff)
7517 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7518 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7519
7520 /* Finish up dynamic symbol handling. We set the contents of various
7521 dynamic sections here. */
7522
7523 static bfd_boolean
7524 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7525 struct bfd_link_info *info,
7526 struct elf_link_hash_entry *h,
7527 Elf_Internal_Sym *sym)
7528 {
7529 struct ppc_elf_link_hash_table *htab;
7530 struct plt_entry *ent;
7531 bfd_boolean doneone;
7532
7533 #ifdef DEBUG
7534 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7535 h->root.root.string);
7536 #endif
7537
7538 htab = ppc_elf_hash_table (info);
7539 BFD_ASSERT (htab->elf.dynobj != NULL);
7540
7541 doneone = FALSE;
7542 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7543 if (ent->plt.offset != (bfd_vma) -1)
7544 {
7545 if (!doneone)
7546 {
7547 Elf_Internal_Rela rela;
7548 bfd_byte *loc;
7549 bfd_vma reloc_index;
7550
7551 if (htab->plt_type == PLT_NEW)
7552 reloc_index = ent->plt.offset / 4;
7553 else
7554 {
7555 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7556 / htab->plt_slot_size);
7557 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7558 && htab->plt_type == PLT_OLD)
7559 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7560 }
7561
7562 /* This symbol has an entry in the procedure linkage table.
7563 Set it up. */
7564 if (htab->plt_type == PLT_VXWORKS)
7565 {
7566 bfd_vma got_offset;
7567 const bfd_vma *plt_entry;
7568
7569 /* The first three entries in .got.plt are reserved. */
7570 got_offset = (reloc_index + 3) * 4;
7571
7572 /* Use the right PLT. */
7573 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7574 : ppc_elf_vxworks_plt_entry;
7575
7576 /* Fill in the .plt on VxWorks. */
7577 if (info->shared)
7578 {
7579 bfd_put_32 (output_bfd,
7580 plt_entry[0] | PPC_HA (got_offset),
7581 htab->plt->contents + ent->plt.offset + 0);
7582 bfd_put_32 (output_bfd,
7583 plt_entry[1] | PPC_LO (got_offset),
7584 htab->plt->contents + ent->plt.offset + 4);
7585 }
7586 else
7587 {
7588 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
7589
7590 bfd_put_32 (output_bfd,
7591 plt_entry[0] | PPC_HA (got_loc),
7592 htab->plt->contents + ent->plt.offset + 0);
7593 bfd_put_32 (output_bfd,
7594 plt_entry[1] | PPC_LO (got_loc),
7595 htab->plt->contents + ent->plt.offset + 4);
7596 }
7597
7598 bfd_put_32 (output_bfd, plt_entry[2],
7599 htab->plt->contents + ent->plt.offset + 8);
7600 bfd_put_32 (output_bfd, plt_entry[3],
7601 htab->plt->contents + ent->plt.offset + 12);
7602
7603 /* This instruction is an immediate load. The value loaded is
7604 the byte offset of the R_PPC_JMP_SLOT relocation from the
7605 start of the .rela.plt section. The value is stored in the
7606 low-order 16 bits of the load instruction. */
7607 /* NOTE: It appears that this is now an index rather than a
7608 prescaled offset. */
7609 bfd_put_32 (output_bfd,
7610 plt_entry[4] | reloc_index,
7611 htab->plt->contents + ent->plt.offset + 16);
7612 /* This instruction is a PC-relative branch whose target is
7613 the start of the PLT section. The address of this branch
7614 instruction is 20 bytes beyond the start of this PLT entry.
7615 The address is encoded in bits 6-29, inclusive. The value
7616 stored is right-shifted by two bits, permitting a 26-bit
7617 offset. */
7618 bfd_put_32 (output_bfd,
7619 (plt_entry[5]
7620 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7621 htab->plt->contents + ent->plt.offset + 20);
7622 bfd_put_32 (output_bfd, plt_entry[6],
7623 htab->plt->contents + ent->plt.offset + 24);
7624 bfd_put_32 (output_bfd, plt_entry[7],
7625 htab->plt->contents + ent->plt.offset + 28);
7626
7627 /* Fill in the GOT entry corresponding to this PLT slot with
7628 the address immediately after the the "bctr" instruction
7629 in this PLT entry. */
7630 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7631 + htab->plt->output_offset
7632 + ent->plt.offset + 16),
7633 htab->sgotplt->contents + got_offset);
7634
7635 if (!info->shared)
7636 {
7637 /* Fill in a couple of entries in .rela.plt.unloaded. */
7638 loc = htab->srelplt2->contents
7639 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7640 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7641 * sizeof (Elf32_External_Rela));
7642
7643 /* Provide the @ha relocation for the first instruction. */
7644 rela.r_offset = (htab->plt->output_section->vma
7645 + htab->plt->output_offset
7646 + ent->plt.offset + 2);
7647 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7648 R_PPC_ADDR16_HA);
7649 rela.r_addend = got_offset;
7650 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7651 loc += sizeof (Elf32_External_Rela);
7652
7653 /* Provide the @l relocation for the second instruction. */
7654 rela.r_offset = (htab->plt->output_section->vma
7655 + htab->plt->output_offset
7656 + ent->plt.offset + 6);
7657 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7658 R_PPC_ADDR16_LO);
7659 rela.r_addend = got_offset;
7660 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7661 loc += sizeof (Elf32_External_Rela);
7662
7663 /* Provide a relocation for the GOT entry corresponding to this
7664 PLT slot. Point it at the middle of the .plt entry. */
7665 rela.r_offset = (htab->sgotplt->output_section->vma
7666 + htab->sgotplt->output_offset
7667 + got_offset);
7668 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7669 R_PPC_ADDR32);
7670 rela.r_addend = ent->plt.offset + 16;
7671 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7672 }
7673
7674 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7675 In particular, the offset for the relocation is not the
7676 address of the PLT entry for this function, as specified
7677 by the ABI. Instead, the offset is set to the address of
7678 the GOT slot for this function. See EABI 4.4.4.1. */
7679 rela.r_offset = (htab->sgotplt->output_section->vma
7680 + htab->sgotplt->output_offset
7681 + got_offset);
7682
7683 }
7684 else
7685 {
7686 rela.r_offset = (htab->plt->output_section->vma
7687 + htab->plt->output_offset
7688 + ent->plt.offset);
7689 if (htab->plt_type == PLT_OLD)
7690 {
7691 /* We don't need to fill in the .plt. The ppc dynamic
7692 linker will fill it in. */
7693 }
7694 else
7695 {
7696 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7697 + htab->glink->output_section->vma
7698 + htab->glink->output_offset);
7699 bfd_put_32 (output_bfd, val,
7700 htab->plt->contents + ent->plt.offset);
7701 }
7702 }
7703
7704 /* Fill in the entry in the .rela.plt section. */
7705 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7706 rela.r_addend = 0;
7707
7708 loc = (htab->relplt->contents
7709 + reloc_index * sizeof (Elf32_External_Rela));
7710 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7711
7712 if (!h->def_regular)
7713 {
7714 /* Mark the symbol as undefined, rather than as
7715 defined in the .plt section. Leave the value if
7716 there were any relocations where pointer equality
7717 matters (this is a clue for the dynamic linker, to
7718 make function pointer comparisons work between an
7719 application and shared library), otherwise set it
7720 to zero. */
7721 sym->st_shndx = SHN_UNDEF;
7722 if (!h->pointer_equality_needed)
7723 sym->st_value = 0;
7724 else if (!h->ref_regular_nonweak)
7725 {
7726 /* This breaks function pointer comparisons, but
7727 that is better than breaking tests for a NULL
7728 function pointer. */
7729 sym->st_value = 0;
7730 }
7731 }
7732 doneone = TRUE;
7733 }
7734
7735 if (htab->plt_type == PLT_NEW)
7736 {
7737 bfd_vma plt;
7738 unsigned char *p;
7739
7740 plt = (ent->plt.offset
7741 + htab->plt->output_section->vma
7742 + htab->plt->output_offset);
7743 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7744
7745 if (info->shared || info->pie)
7746 {
7747 bfd_vma got = 0;
7748
7749 if (ent->addend >= 32768)
7750 got = (ent->addend
7751 + ent->sec->output_section->vma
7752 + ent->sec->output_offset);
7753 else if (htab->elf.hgot != NULL)
7754 got = SYM_VAL (htab->elf.hgot);
7755
7756 plt -= got;
7757
7758 if (plt + 0x8000 < 0x10000)
7759 {
7760 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7761 p += 4;
7762 bfd_put_32 (output_bfd, MTCTR_11, p);
7763 p += 4;
7764 bfd_put_32 (output_bfd, BCTR, p);
7765 p += 4;
7766 bfd_put_32 (output_bfd, NOP, p);
7767 p += 4;
7768 }
7769 else
7770 {
7771 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7772 p += 4;
7773 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7774 p += 4;
7775 bfd_put_32 (output_bfd, MTCTR_11, p);
7776 p += 4;
7777 bfd_put_32 (output_bfd, BCTR, p);
7778 p += 4;
7779 }
7780 }
7781 else
7782 {
7783 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7784 p += 4;
7785 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7786 p += 4;
7787 bfd_put_32 (output_bfd, MTCTR_11, p);
7788 p += 4;
7789 bfd_put_32 (output_bfd, BCTR, p);
7790 p += 4;
7791
7792 /* We only need one non-PIC glink stub. */
7793 break;
7794 }
7795 }
7796 else
7797 break;
7798 }
7799
7800 if (h->needs_copy)
7801 {
7802 asection *s;
7803 Elf_Internal_Rela rela;
7804 bfd_byte *loc;
7805
7806 /* This symbols needs a copy reloc. Set it up. */
7807
7808 #ifdef DEBUG
7809 fprintf (stderr, ", copy");
7810 #endif
7811
7812 BFD_ASSERT (h->dynindx != -1);
7813
7814 if (ppc_elf_hash_entry (h)->has_sda_refs)
7815 s = htab->relsbss;
7816 else
7817 s = htab->relbss;
7818 BFD_ASSERT (s != NULL);
7819
7820 rela.r_offset = SYM_VAL (h);
7821 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7822 rela.r_addend = 0;
7823 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7824 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7825 }
7826
7827 #ifdef DEBUG
7828 fprintf (stderr, "\n");
7829 #endif
7830
7831 /* Mark some specially defined symbols as absolute. */
7832 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7833 || (!htab->is_vxworks
7834 && (h == htab->elf.hgot
7835 || strcmp (h->root.root.string,
7836 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7837 sym->st_shndx = SHN_ABS;
7838
7839 return TRUE;
7840 }
7841 \f
7842 static enum elf_reloc_type_class
7843 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7844 {
7845 switch (ELF32_R_TYPE (rela->r_info))
7846 {
7847 case R_PPC_RELATIVE:
7848 return reloc_class_relative;
7849 case R_PPC_REL24:
7850 case R_PPC_ADDR24:
7851 case R_PPC_JMP_SLOT:
7852 return reloc_class_plt;
7853 case R_PPC_COPY:
7854 return reloc_class_copy;
7855 default:
7856 return reloc_class_normal;
7857 }
7858 }
7859 \f
7860 /* Finish up the dynamic sections. */
7861
7862 static bfd_boolean
7863 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7864 struct bfd_link_info *info)
7865 {
7866 asection *sdyn;
7867 asection *splt;
7868 struct ppc_elf_link_hash_table *htab;
7869 bfd_vma got;
7870 bfd *dynobj;
7871 bfd_boolean ret = TRUE;
7872
7873 #ifdef DEBUG
7874 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7875 #endif
7876
7877 htab = ppc_elf_hash_table (info);
7878 dynobj = elf_hash_table (info)->dynobj;
7879 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7880 if (htab->is_vxworks)
7881 splt = bfd_get_section_by_name (dynobj, ".plt");
7882 else
7883 splt = NULL;
7884
7885 got = 0;
7886 if (htab->elf.hgot != NULL)
7887 got = SYM_VAL (htab->elf.hgot);
7888
7889 if (htab->elf.dynamic_sections_created)
7890 {
7891 Elf32_External_Dyn *dyncon, *dynconend;
7892
7893 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7894
7895 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7896 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7897 for (; dyncon < dynconend; dyncon++)
7898 {
7899 Elf_Internal_Dyn dyn;
7900 asection *s;
7901
7902 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7903
7904 switch (dyn.d_tag)
7905 {
7906 case DT_PLTGOT:
7907 if (htab->is_vxworks)
7908 s = htab->sgotplt;
7909 else
7910 s = htab->plt;
7911 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7912 break;
7913
7914 case DT_PLTRELSZ:
7915 dyn.d_un.d_val = htab->relplt->size;
7916 break;
7917
7918 case DT_JMPREL:
7919 s = htab->relplt;
7920 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7921 break;
7922
7923 case DT_PPC_GOT:
7924 dyn.d_un.d_ptr = got;
7925 break;
7926
7927 case DT_RELASZ:
7928 if (htab->is_vxworks)
7929 {
7930 if (htab->relplt)
7931 dyn.d_un.d_ptr -= htab->relplt->size;
7932 break;
7933 }
7934 continue;
7935
7936 default:
7937 if (htab->is_vxworks
7938 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7939 break;
7940 continue;
7941 }
7942
7943 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7944 }
7945 }
7946
7947 if (htab->got != NULL)
7948 {
7949 if (htab->elf.hgot->root.u.def.section == htab->got
7950 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
7951 {
7952 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
7953
7954 p += htab->elf.hgot->root.u.def.value;
7955 if (htab->plt_type == PLT_OLD)
7956 {
7957 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
7958 so that a function can easily find the address of
7959 _GLOBAL_OFFSET_TABLE_. */
7960 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
7961 < htab->elf.hgot->root.u.def.section->size);
7962 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
7963 }
7964
7965 if (sdyn != NULL)
7966 {
7967 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
7968 BFD_ASSERT (htab->elf.hgot->root.u.def.value
7969 < htab->elf.hgot->root.u.def.section->size);
7970 bfd_put_32 (output_bfd, val, p);
7971 }
7972 }
7973 else
7974 {
7975 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
7976 htab->elf.hgot->root.root.string,
7977 (htab->sgotplt != NULL
7978 ? htab->sgotplt->name : htab->got->name));
7979 bfd_set_error (bfd_error_bad_value);
7980 ret = FALSE;
7981 }
7982
7983 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7984 }
7985
7986 /* Fill in the first entry in the VxWorks procedure linkage table. */
7987 if (splt && splt->size > 0)
7988 {
7989 /* Use the right PLT. */
7990 static const bfd_vma *plt_entry = NULL;
7991 plt_entry = info->shared ?
7992 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7993
7994 if (!info->shared)
7995 {
7996 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
7997
7998 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
7999 splt->contents + 0);
8000 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8001 splt->contents + 4);
8002 }
8003 else
8004 {
8005 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8006 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8007 }
8008 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8009 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8010 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8011 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8012 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8013 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8014
8015 if (! info->shared)
8016 {
8017 Elf_Internal_Rela rela;
8018 bfd_byte *loc;
8019
8020 loc = htab->srelplt2->contents;
8021
8022 /* Output the @ha relocation for the first instruction. */
8023 rela.r_offset = (htab->plt->output_section->vma
8024 + htab->plt->output_offset
8025 + 2);
8026 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8027 rela.r_addend = 0;
8028 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8029 loc += sizeof (Elf32_External_Rela);
8030
8031 /* Output the @l relocation for the second instruction. */
8032 rela.r_offset = (htab->plt->output_section->vma
8033 + htab->plt->output_offset
8034 + 6);
8035 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8036 rela.r_addend = 0;
8037 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8038 loc += sizeof (Elf32_External_Rela);
8039
8040 /* Fix up the remaining relocations. They may have the wrong
8041 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8042 in which symbols were output. */
8043 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8044 {
8045 Elf_Internal_Rela rel;
8046
8047 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8048 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8049 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8050 loc += sizeof (Elf32_External_Rela);
8051
8052 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8053 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8054 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8055 loc += sizeof (Elf32_External_Rela);
8056
8057 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8058 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8059 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8060 loc += sizeof (Elf32_External_Rela);
8061 }
8062 }
8063 }
8064
8065 if (htab->glink != NULL && htab->glink->contents != NULL)
8066 {
8067 unsigned char *p;
8068 unsigned char *endp;
8069 bfd_vma res0;
8070 unsigned int i;
8071
8072 /*
8073 * PIC glink code is the following:
8074 *
8075 * # ith PLT code stub.
8076 * addis 11,30,(plt+(i-1)*4-got)@ha
8077 * lwz 11,(plt+(i-1)*4-got)@l(11)
8078 * mtctr 11
8079 * bctr
8080 *
8081 * # A table of branches, one for each plt entry.
8082 * # The idea is that the plt call stub loads ctr and r11 with these
8083 * # addresses, so (r11 - res_0) gives the plt index * 4.
8084 * res_0: b PLTresolve
8085 * res_1: b PLTresolve
8086 * .
8087 * # Some number of entries towards the end can be nops
8088 * res_n_m3: nop
8089 * res_n_m2: nop
8090 * res_n_m1:
8091 *
8092 * PLTresolve:
8093 * addis 11,11,(1f-res_0)@ha
8094 * mflr 0
8095 * bcl 20,31,1f
8096 * 1: addi 11,11,(1b-res_0)@l
8097 * mflr 12
8098 * mtlr 0
8099 * sub 11,11,12 # r11 = index * 4
8100 * addis 12,12,(got+4-1b)@ha
8101 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8102 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8103 * mtctr 0
8104 * add 0,11,11
8105 * add 11,0,11 # r11 = index * 12 = reloc offset.
8106 * bctr
8107 */
8108 static const unsigned int pic_plt_resolve[] =
8109 {
8110 ADDIS_11_11,
8111 MFLR_0,
8112 BCL_20_31,
8113 ADDI_11_11,
8114 MFLR_12,
8115 MTLR_0,
8116 SUB_11_11_12,
8117 ADDIS_12_12,
8118 LWZ_0_12,
8119 LWZ_12_12,
8120 MTCTR_0,
8121 ADD_0_11_11,
8122 ADD_11_0_11,
8123 BCTR,
8124 NOP,
8125 NOP
8126 };
8127
8128 /*
8129 * Non-PIC glink code is a little simpler.
8130 *
8131 * # ith PLT code stub.
8132 * lis 11,(plt+(i-1)*4)@ha
8133 * lwz 11,(plt+(i-1)*4)@l(11)
8134 * mtctr 11
8135 * bctr
8136 *
8137 * The branch table is the same, then comes
8138 *
8139 * PLTresolve:
8140 * lis 12,(got+4)@ha
8141 * addis 11,11,(-res_0)@ha
8142 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8143 * addi 11,11,(-res_0)@l # r11 = index * 4
8144 * mtctr 0
8145 * add 0,11,11
8146 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8147 * add 11,0,11 # r11 = index * 12 = reloc offset.
8148 * bctr
8149 */
8150 static const unsigned int plt_resolve[] =
8151 {
8152 LIS_12,
8153 ADDIS_11_11,
8154 LWZ_0_12,
8155 ADDI_11_11,
8156 MTCTR_0,
8157 ADD_0_11_11,
8158 LWZ_12_12,
8159 ADD_11_0_11,
8160 BCTR,
8161 NOP,
8162 NOP,
8163 NOP,
8164 NOP,
8165 NOP,
8166 NOP,
8167 NOP
8168 };
8169
8170 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8171 abort ();
8172 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8173 abort ();
8174
8175 /* Build the branch table, one for each plt entry (less one),
8176 and perhaps some padding. */
8177 p = htab->glink->contents;
8178 p += htab->glink_pltresolve;
8179 endp = htab->glink->contents;
8180 endp += htab->glink->size - GLINK_PLTRESOLVE;
8181 while (p < endp - 8 * 4)
8182 {
8183 bfd_put_32 (output_bfd, B + endp - p, p);
8184 p += 4;
8185 }
8186 while (p < endp)
8187 {
8188 bfd_put_32 (output_bfd, NOP, p);
8189 p += 4;
8190 }
8191
8192 res0 = (htab->glink_pltresolve
8193 + htab->glink->output_section->vma
8194 + htab->glink->output_offset);
8195
8196 /* Last comes the PLTresolve stub. */
8197 if (info->shared || info->pie)
8198 {
8199 bfd_vma bcl;
8200
8201 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8202 {
8203 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8204 p += 4;
8205 }
8206 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8207
8208 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8209 + htab->glink->output_section->vma
8210 + htab->glink->output_offset);
8211
8212 bfd_put_32 (output_bfd,
8213 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8214 bfd_put_32 (output_bfd,
8215 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8216 bfd_put_32 (output_bfd,
8217 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8218 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8219 {
8220 bfd_put_32 (output_bfd,
8221 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8222 bfd_put_32 (output_bfd,
8223 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8224 }
8225 else
8226 {
8227 bfd_put_32 (output_bfd,
8228 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8229 bfd_put_32 (output_bfd,
8230 LWZ_12_12 + 4, p + 9*4);
8231 }
8232 }
8233 else
8234 {
8235 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8236 {
8237 bfd_put_32 (output_bfd, plt_resolve[i], p);
8238 p += 4;
8239 }
8240 p -= 4 * ARRAY_SIZE (plt_resolve);
8241
8242 bfd_put_32 (output_bfd,
8243 LIS_12 + PPC_HA (got + 4), p + 0*4);
8244 bfd_put_32 (output_bfd,
8245 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8246 bfd_put_32 (output_bfd,
8247 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8248 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8249 {
8250 bfd_put_32 (output_bfd,
8251 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8252 bfd_put_32 (output_bfd,
8253 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8254 }
8255 else
8256 {
8257 bfd_put_32 (output_bfd,
8258 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8259 bfd_put_32 (output_bfd,
8260 LWZ_12_12 + 4, p + 6*4);
8261 }
8262 }
8263 }
8264
8265 return ret;
8266 }
8267 \f
8268 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8269 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8270 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8271 #define TARGET_BIG_NAME "elf32-powerpc"
8272 #define ELF_ARCH bfd_arch_powerpc
8273 #define ELF_MACHINE_CODE EM_PPC
8274 #ifdef __QNXTARGET__
8275 #define ELF_MAXPAGESIZE 0x1000
8276 #else
8277 #define ELF_MAXPAGESIZE 0x10000
8278 #endif
8279 #define ELF_MINPAGESIZE 0x1000
8280 #define ELF_COMMONPAGESIZE 0x1000
8281 #define elf_info_to_howto ppc_elf_info_to_howto
8282
8283 #ifdef EM_CYGNUS_POWERPC
8284 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8285 #endif
8286
8287 #ifdef EM_PPC_OLD
8288 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8289 #endif
8290
8291 #define elf_backend_plt_not_loaded 1
8292 #define elf_backend_can_gc_sections 1
8293 #define elf_backend_can_refcount 1
8294 #define elf_backend_rela_normal 1
8295
8296 #define bfd_elf32_mkobject ppc_elf_mkobject
8297 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8298 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8299 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8300 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8301 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8302 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8303 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8304
8305 #define elf_backend_object_p ppc_elf_object_p
8306 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8307 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8308 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8309 #define elf_backend_relocate_section ppc_elf_relocate_section
8310 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8311 #define elf_backend_check_relocs ppc_elf_check_relocs
8312 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8313 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8314 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8315 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8316 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8317 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8318 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8319 #define elf_backend_fake_sections ppc_elf_fake_sections
8320 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8321 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8322 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8323 #define elf_backend_write_core_note ppc_elf_write_core_note
8324 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8325 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8326 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8327 #define elf_backend_write_section ppc_elf_write_section
8328 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8329 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8330 #define elf_backend_action_discarded ppc_elf_action_discarded
8331 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8332
8333 #include "elf32-target.h"
8334
8335 /* VxWorks Target */
8336
8337 #undef TARGET_LITTLE_SYM
8338 #undef TARGET_LITTLE_NAME
8339
8340 #undef TARGET_BIG_SYM
8341 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8342 #undef TARGET_BIG_NAME
8343 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8344
8345 /* VxWorks uses the elf default section flags for .plt. */
8346 static const struct bfd_elf_special_section *
8347 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8348 {
8349 if (sec->name == NULL)
8350 return NULL;
8351
8352 if (strcmp (sec->name, ".plt") == 0)
8353 return _bfd_elf_get_sec_type_attr (abfd, sec);
8354
8355 return ppc_elf_get_sec_type_attr (abfd, sec);
8356 }
8357
8358 /* Like ppc_elf_link_hash_table_create, but overrides
8359 appropriately for VxWorks. */
8360 static struct bfd_link_hash_table *
8361 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8362 {
8363 struct bfd_link_hash_table *ret;
8364
8365 ret = ppc_elf_link_hash_table_create (abfd);
8366 if (ret)
8367 {
8368 struct ppc_elf_link_hash_table *htab
8369 = (struct ppc_elf_link_hash_table *)ret;
8370 htab->is_vxworks = 1;
8371 htab->plt_type = PLT_VXWORKS;
8372 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8373 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8374 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8375 }
8376 return ret;
8377 }
8378
8379 /* Tweak magic VxWorks symbols as they are loaded. */
8380 static bfd_boolean
8381 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8382 struct bfd_link_info *info,
8383 Elf_Internal_Sym *sym,
8384 const char **namep ATTRIBUTE_UNUSED,
8385 flagword *flagsp ATTRIBUTE_UNUSED,
8386 asection **secp,
8387 bfd_vma *valp)
8388 {
8389 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8390 valp))
8391 return FALSE;
8392
8393 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8394 }
8395
8396 static void
8397 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8398 {
8399 ppc_elf_final_write_processing(abfd, linker);
8400 elf_vxworks_final_write_processing(abfd, linker);
8401 }
8402
8403 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8404 define it. */
8405 #undef elf_backend_want_plt_sym
8406 #define elf_backend_want_plt_sym 1
8407 #undef elf_backend_want_got_plt
8408 #define elf_backend_want_got_plt 1
8409 #undef elf_backend_got_symbol_offset
8410 #define elf_backend_got_symbol_offset 0
8411 #undef elf_backend_plt_not_loaded
8412 #define elf_backend_plt_not_loaded 0
8413 #undef elf_backend_plt_readonly
8414 #define elf_backend_plt_readonly 1
8415 #undef elf_backend_got_header_size
8416 #define elf_backend_got_header_size 12
8417
8418 #undef bfd_elf32_get_synthetic_symtab
8419
8420 #undef bfd_elf32_bfd_link_hash_table_create
8421 #define bfd_elf32_bfd_link_hash_table_create \
8422 ppc_elf_vxworks_link_hash_table_create
8423 #undef elf_backend_add_symbol_hook
8424 #define elf_backend_add_symbol_hook \
8425 ppc_elf_vxworks_add_symbol_hook
8426 #undef elf_backend_link_output_symbol_hook
8427 #define elf_backend_link_output_symbol_hook \
8428 elf_vxworks_link_output_symbol_hook
8429 #undef elf_backend_final_write_processing
8430 #define elf_backend_final_write_processing \
8431 ppc_elf_vxworks_final_write_processing
8432 #undef elf_backend_get_sec_type_attr
8433 #define elf_backend_get_sec_type_attr \
8434 ppc_elf_vxworks_get_sec_type_attr
8435 #undef elf_backend_emit_relocs
8436 #define elf_backend_emit_relocs \
8437 elf_vxworks_emit_relocs
8438
8439 #undef elf32_bed
8440 #define elf32_bed ppc_elf_vxworks_bed
8441
8442 #include "elf32-target.h"
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