projects / deliverable / binutils-gdb.git / blob
? search:


a93a7065e5ed91363eab6d9102db59e1d7b67968
[deliverable/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 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 \f
161 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
162
163 static reloc_howto_type ppc_elf_howto_raw[] = {
164 /* This reloc does nothing. */
165 HOWTO (R_PPC_NONE, /* type */
166 0, /* rightshift */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
168 32, /* bitsize */
169 FALSE, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_PPC_NONE", /* name */
174 FALSE, /* partial_inplace */
175 0, /* src_mask */
176 0, /* dst_mask */
177 FALSE), /* pcrel_offset */
178
179 /* A standard 32 bit relocation. */
180 HOWTO (R_PPC_ADDR32, /* type */
181 0, /* rightshift */
182 2, /* size (0 = byte, 1 = short, 2 = long) */
183 32, /* bitsize */
184 FALSE, /* pc_relative */
185 0, /* bitpos */
186 complain_overflow_bitfield, /* complain_on_overflow */
187 bfd_elf_generic_reloc, /* special_function */
188 "R_PPC_ADDR32", /* name */
189 FALSE, /* partial_inplace */
190 0, /* src_mask */
191 0xffffffff, /* dst_mask */
192 FALSE), /* pcrel_offset */
193
194 /* An absolute 26 bit branch; the lower two bits must be zero.
195 FIXME: we don't check that, we just clear them. */
196 HOWTO (R_PPC_ADDR24, /* type */
197 0, /* rightshift */
198 2, /* size (0 = byte, 1 = short, 2 = long) */
199 26, /* bitsize */
200 FALSE, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_bitfield, /* complain_on_overflow */
203 bfd_elf_generic_reloc, /* special_function */
204 "R_PPC_ADDR24", /* name */
205 FALSE, /* partial_inplace */
206 0, /* src_mask */
207 0x3fffffc, /* dst_mask */
208 FALSE), /* pcrel_offset */
209
210 /* A standard 16 bit relocation. */
211 HOWTO (R_PPC_ADDR16, /* type */
212 0, /* rightshift */
213 1, /* size (0 = byte, 1 = short, 2 = long) */
214 16, /* bitsize */
215 FALSE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_bitfield, /* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_PPC_ADDR16", /* name */
220 FALSE, /* partial_inplace */
221 0, /* src_mask */
222 0xffff, /* dst_mask */
223 FALSE), /* pcrel_offset */
224
225 /* A 16 bit relocation without overflow. */
226 HOWTO (R_PPC_ADDR16_LO, /* type */
227 0, /* rightshift */
228 1, /* size (0 = byte, 1 = short, 2 = long) */
229 16, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont,/* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_PPC_ADDR16_LO", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0xffff, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* The high order 16 bits of an address. */
241 HOWTO (R_PPC_ADDR16_HI, /* type */
242 16, /* rightshift */
243 1, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC_ADDR16_HI", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0xffff, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* The high order 16 bits of an address, plus 1 if the contents of
256 the low 16 bits, treated as a signed number, is negative. */
257 HOWTO (R_PPC_ADDR16_HA, /* type */
258 16, /* rightshift */
259 1, /* size (0 = byte, 1 = short, 2 = long) */
260 16, /* bitsize */
261 FALSE, /* pc_relative */
262 0, /* bitpos */
263 complain_overflow_dont, /* complain_on_overflow */
264 ppc_elf_addr16_ha_reloc, /* special_function */
265 "R_PPC_ADDR16_HA", /* name */
266 FALSE, /* partial_inplace */
267 0, /* src_mask */
268 0xffff, /* dst_mask */
269 FALSE), /* pcrel_offset */
270
271 /* An absolute 16 bit branch; the lower two bits must be zero.
272 FIXME: we don't check that, we just clear them. */
273 HOWTO (R_PPC_ADDR14, /* type */
274 0, /* rightshift */
275 2, /* size (0 = byte, 1 = short, 2 = long) */
276 16, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_bitfield, /* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_PPC_ADDR14", /* name */
282 FALSE, /* partial_inplace */
283 0, /* src_mask */
284 0xfffc, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* An absolute 16 bit branch, for which bit 10 should be set to
288 indicate that the branch is expected to be taken. The lower two
289 bits must be zero. */
290 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 16, /* bitsize */
294 FALSE, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_bitfield, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC_ADDR14_BRTAKEN",/* name */
299 FALSE, /* partial_inplace */
300 0, /* src_mask */
301 0xfffc, /* dst_mask */
302 FALSE), /* pcrel_offset */
303
304 /* An absolute 16 bit branch, for which bit 10 should be set to
305 indicate that the branch is not expected to be taken. The lower
306 two bits must be zero. */
307 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
308 0, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 16, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_PPC_ADDR14_BRNTAKEN",/* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0xfffc, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* A relative 26 bit branch; the lower two bits must be zero. */
322 HOWTO (R_PPC_REL24, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 26, /* bitsize */
326 TRUE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_signed, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC_REL24", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0x3fffffc, /* dst_mask */
334 TRUE), /* pcrel_offset */
335
336 /* A relative 16 bit branch; the lower two bits must be zero. */
337 HOWTO (R_PPC_REL14, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 TRUE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_signed, /* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_PPC_REL14", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0xfffc, /* dst_mask */
349 TRUE), /* pcrel_offset */
350
351 /* A relative 16 bit branch. Bit 10 should be set to indicate that
352 the branch is expected to be taken. The lower two bits must be
353 zero. */
354 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 TRUE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_signed, /* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_PPC_REL14_BRTAKEN", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0xfffc, /* dst_mask */
366 TRUE), /* pcrel_offset */
367
368 /* A relative 16 bit branch. Bit 10 should be set to indicate that
369 the branch is not expected to be taken. The lower two bits must
370 be zero. */
371 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
372 0, /* rightshift */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 TRUE, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_signed, /* complain_on_overflow */
378 bfd_elf_generic_reloc, /* special_function */
379 "R_PPC_REL14_BRNTAKEN",/* name */
380 FALSE, /* partial_inplace */
381 0, /* src_mask */
382 0xfffc, /* dst_mask */
383 TRUE), /* pcrel_offset */
384
385 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
386 symbol. */
387 HOWTO (R_PPC_GOT16, /* type */
388 0, /* rightshift */
389 1, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
391 FALSE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_signed, /* complain_on_overflow */
394 bfd_elf_generic_reloc, /* special_function */
395 "R_PPC_GOT16", /* name */
396 FALSE, /* partial_inplace */
397 0, /* src_mask */
398 0xffff, /* dst_mask */
399 FALSE), /* pcrel_offset */
400
401 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
402 the symbol. */
403 HOWTO (R_PPC_GOT16_LO, /* type */
404 0, /* rightshift */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_dont, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* special_function */
411 "R_PPC_GOT16_LO", /* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0xffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
418 the symbol. */
419 HOWTO (R_PPC_GOT16_HI, /* type */
420 16, /* rightshift */
421 1, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 FALSE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_bitfield, /* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 "R_PPC_GOT16_HI", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0xffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
432
433 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
434 the symbol. */
435 HOWTO (R_PPC_GOT16_HA, /* type */
436 16, /* rightshift */
437 1, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 FALSE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_bitfield, /* complain_on_overflow */
442 ppc_elf_addr16_ha_reloc, /* special_function */
443 "R_PPC_GOT16_HA", /* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0xffff, /* dst_mask */
447 FALSE), /* pcrel_offset */
448
449 /* Like R_PPC_REL24, but referring to the procedure linkage table
450 entry for the symbol. */
451 HOWTO (R_PPC_PLTREL24, /* type */
452 0, /* rightshift */
453 2, /* size (0 = byte, 1 = short, 2 = long) */
454 26, /* bitsize */
455 TRUE, /* pc_relative */
456 0, /* bitpos */
457 complain_overflow_signed, /* complain_on_overflow */
458 bfd_elf_generic_reloc, /* special_function */
459 "R_PPC_PLTREL24", /* name */
460 FALSE, /* partial_inplace */
461 0, /* src_mask */
462 0x3fffffc, /* dst_mask */
463 TRUE), /* pcrel_offset */
464
465 /* This is used only by the dynamic linker. The symbol should exist
466 both in the object being run and in some shared library. The
467 dynamic linker copies the data addressed by the symbol from the
468 shared library into the object, because the object being
469 run has to have the data at some particular address. */
470 HOWTO (R_PPC_COPY, /* type */
471 0, /* rightshift */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
473 32, /* bitsize */
474 FALSE, /* pc_relative */
475 0, /* bitpos */
476 complain_overflow_bitfield, /* complain_on_overflow */
477 bfd_elf_generic_reloc, /* special_function */
478 "R_PPC_COPY", /* name */
479 FALSE, /* partial_inplace */
480 0, /* src_mask */
481 0, /* dst_mask */
482 FALSE), /* pcrel_offset */
483
484 /* Like R_PPC_ADDR32, but used when setting global offset table
485 entries. */
486 HOWTO (R_PPC_GLOB_DAT, /* type */
487 0, /* rightshift */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
489 32, /* bitsize */
490 FALSE, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_bitfield, /* complain_on_overflow */
493 bfd_elf_generic_reloc, /* special_function */
494 "R_PPC_GLOB_DAT", /* name */
495 FALSE, /* partial_inplace */
496 0, /* src_mask */
497 0xffffffff, /* dst_mask */
498 FALSE), /* pcrel_offset */
499
500 /* Marks a procedure linkage table entry for a symbol. */
501 HOWTO (R_PPC_JMP_SLOT, /* type */
502 0, /* rightshift */
503 2, /* size (0 = byte, 1 = short, 2 = long) */
504 32, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_bitfield, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_PPC_JMP_SLOT", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Used only by the dynamic linker. When the object is run, this
516 longword is set to the load address of the object, plus the
517 addend. */
518 HOWTO (R_PPC_RELATIVE, /* type */
519 0, /* rightshift */
520 2, /* size (0 = byte, 1 = short, 2 = long) */
521 32, /* bitsize */
522 FALSE, /* pc_relative */
523 0, /* bitpos */
524 complain_overflow_bitfield, /* complain_on_overflow */
525 bfd_elf_generic_reloc, /* special_function */
526 "R_PPC_RELATIVE", /* name */
527 FALSE, /* partial_inplace */
528 0, /* src_mask */
529 0xffffffff, /* dst_mask */
530 FALSE), /* pcrel_offset */
531
532 /* Like R_PPC_REL24, but uses the value of the symbol within the
533 object rather than the final value. Normally used for
534 _GLOBAL_OFFSET_TABLE_. */
535 HOWTO (R_PPC_LOCAL24PC, /* type */
536 0, /* rightshift */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
538 26, /* bitsize */
539 TRUE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_signed, /* complain_on_overflow */
542 bfd_elf_generic_reloc, /* special_function */
543 "R_PPC_LOCAL24PC", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 0x3fffffc, /* dst_mask */
547 TRUE), /* pcrel_offset */
548
549 /* Like R_PPC_ADDR32, but may be unaligned. */
550 HOWTO (R_PPC_UADDR32, /* type */
551 0, /* rightshift */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
553 32, /* bitsize */
554 FALSE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_bitfield, /* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_PPC_UADDR32", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 0xffffffff, /* dst_mask */
562 FALSE), /* pcrel_offset */
563
564 /* Like R_PPC_ADDR16, but may be unaligned. */
565 HOWTO (R_PPC_UADDR16, /* type */
566 0, /* rightshift */
567 1, /* size (0 = byte, 1 = short, 2 = long) */
568 16, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_bitfield, /* complain_on_overflow */
572 bfd_elf_generic_reloc, /* special_function */
573 "R_PPC_UADDR16", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0xffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* 32-bit PC relative */
580 HOWTO (R_PPC_REL32, /* type */
581 0, /* rightshift */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
583 32, /* bitsize */
584 TRUE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_bitfield, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 "R_PPC_REL32", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0xffffffff, /* dst_mask */
592 TRUE), /* pcrel_offset */
593
594 /* 32-bit relocation to the symbol's procedure linkage table.
595 FIXME: not supported. */
596 HOWTO (R_PPC_PLT32, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_PPC_PLT32", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
611 FIXME: not supported. */
612 HOWTO (R_PPC_PLTREL32, /* type */
613 0, /* rightshift */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
615 32, /* bitsize */
616 TRUE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_bitfield, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC_PLTREL32", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 0, /* dst_mask */
624 TRUE), /* pcrel_offset */
625
626 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
627 the symbol. */
628 HOWTO (R_PPC_PLT16_LO, /* type */
629 0, /* rightshift */
630 1, /* size (0 = byte, 1 = short, 2 = long) */
631 16, /* bitsize */
632 FALSE, /* pc_relative */
633 0, /* bitpos */
634 complain_overflow_dont, /* complain_on_overflow */
635 bfd_elf_generic_reloc, /* special_function */
636 "R_PPC_PLT16_LO", /* name */
637 FALSE, /* partial_inplace */
638 0, /* src_mask */
639 0xffff, /* dst_mask */
640 FALSE), /* pcrel_offset */
641
642 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
643 the symbol. */
644 HOWTO (R_PPC_PLT16_HI, /* type */
645 16, /* rightshift */
646 1, /* size (0 = byte, 1 = short, 2 = long) */
647 16, /* bitsize */
648 FALSE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_bitfield, /* complain_on_overflow */
651 bfd_elf_generic_reloc, /* special_function */
652 "R_PPC_PLT16_HI", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffff, /* dst_mask */
656 FALSE), /* pcrel_offset */
657
658 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
659 the symbol. */
660 HOWTO (R_PPC_PLT16_HA, /* type */
661 16, /* rightshift */
662 1, /* size (0 = byte, 1 = short, 2 = long) */
663 16, /* bitsize */
664 FALSE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_bitfield, /* complain_on_overflow */
667 ppc_elf_addr16_ha_reloc, /* special_function */
668 "R_PPC_PLT16_HA", /* name */
669 FALSE, /* partial_inplace */
670 0, /* src_mask */
671 0xffff, /* dst_mask */
672 FALSE), /* pcrel_offset */
673
674 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
675 small data items. */
676 HOWTO (R_PPC_SDAREL16, /* type */
677 0, /* rightshift */
678 1, /* size (0 = byte, 1 = short, 2 = long) */
679 16, /* bitsize */
680 FALSE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_signed, /* complain_on_overflow */
683 bfd_elf_generic_reloc, /* special_function */
684 "R_PPC_SDAREL16", /* name */
685 FALSE, /* partial_inplace */
686 0, /* src_mask */
687 0xffff, /* dst_mask */
688 FALSE), /* pcrel_offset */
689
690 /* 16-bit section relative relocation. */
691 HOWTO (R_PPC_SECTOFF, /* type */
692 0, /* rightshift */
693 1, /* size (0 = byte, 1 = short, 2 = long) */
694 16, /* bitsize */
695 FALSE, /* pc_relative */
696 0, /* bitpos */
697 complain_overflow_bitfield, /* complain_on_overflow */
698 bfd_elf_generic_reloc, /* special_function */
699 "R_PPC_SECTOFF", /* name */
700 FALSE, /* partial_inplace */
701 0, /* src_mask */
702 0xffff, /* dst_mask */
703 FALSE), /* pcrel_offset */
704
705 /* 16-bit lower half section relative relocation. */
706 HOWTO (R_PPC_SECTOFF_LO, /* type */
707 0, /* rightshift */
708 1, /* size (0 = byte, 1 = short, 2 = long) */
709 16, /* bitsize */
710 FALSE, /* pc_relative */
711 0, /* bitpos */
712 complain_overflow_dont, /* complain_on_overflow */
713 bfd_elf_generic_reloc, /* special_function */
714 "R_PPC_SECTOFF_LO", /* name */
715 FALSE, /* partial_inplace */
716 0, /* src_mask */
717 0xffff, /* dst_mask */
718 FALSE), /* pcrel_offset */
719
720 /* 16-bit upper half section relative relocation. */
721 HOWTO (R_PPC_SECTOFF_HI, /* type */
722 16, /* rightshift */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
724 16, /* bitsize */
725 FALSE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_bitfield, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 "R_PPC_SECTOFF_HI", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0xffff, /* dst_mask */
733 FALSE), /* pcrel_offset */
734
735 /* 16-bit upper half adjusted section relative relocation. */
736 HOWTO (R_PPC_SECTOFF_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_bitfield, /* complain_on_overflow */
743 ppc_elf_addr16_ha_reloc, /* special_function */
744 "R_PPC_SECTOFF_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* Marker reloc for TLS. */
751 HOWTO (R_PPC_TLS,
752 0, /* rightshift */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
754 32, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 "R_PPC_TLS", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Computes the load module index of the load module that contains the
766 definition of its TLS sym. */
767 HOWTO (R_PPC_DTPMOD32,
768 0, /* rightshift */
769 2, /* size (0 = byte, 1 = short, 2 = long) */
770 32, /* bitsize */
771 FALSE, /* pc_relative */
772 0, /* bitpos */
773 complain_overflow_dont, /* complain_on_overflow */
774 ppc_elf_unhandled_reloc, /* special_function */
775 "R_PPC_DTPMOD32", /* name */
776 FALSE, /* partial_inplace */
777 0, /* src_mask */
778 0xffffffff, /* dst_mask */
779 FALSE), /* pcrel_offset */
780
781 /* Computes a dtv-relative displacement, the difference between the value
782 of sym+add and the base address of the thread-local storage block that
783 contains the definition of sym, minus 0x8000. */
784 HOWTO (R_PPC_DTPREL32,
785 0, /* rightshift */
786 2, /* size (0 = byte, 1 = short, 2 = long) */
787 32, /* bitsize */
788 FALSE, /* pc_relative */
789 0, /* bitpos */
790 complain_overflow_dont, /* complain_on_overflow */
791 ppc_elf_unhandled_reloc, /* special_function */
792 "R_PPC_DTPREL32", /* name */
793 FALSE, /* partial_inplace */
794 0, /* src_mask */
795 0xffffffff, /* dst_mask */
796 FALSE), /* pcrel_offset */
797
798 /* A 16 bit dtprel reloc. */
799 HOWTO (R_PPC_DTPREL16,
800 0, /* rightshift */
801 1, /* size (0 = byte, 1 = short, 2 = long) */
802 16, /* bitsize */
803 FALSE, /* pc_relative */
804 0, /* bitpos */
805 complain_overflow_signed, /* complain_on_overflow */
806 ppc_elf_unhandled_reloc, /* special_function */
807 "R_PPC_DTPREL16", /* name */
808 FALSE, /* partial_inplace */
809 0, /* src_mask */
810 0xffff, /* dst_mask */
811 FALSE), /* pcrel_offset */
812
813 /* Like DTPREL16, but no overflow. */
814 HOWTO (R_PPC_DTPREL16_LO,
815 0, /* rightshift */
816 1, /* size (0 = byte, 1 = short, 2 = long) */
817 16, /* bitsize */
818 FALSE, /* pc_relative */
819 0, /* bitpos */
820 complain_overflow_dont, /* complain_on_overflow */
821 ppc_elf_unhandled_reloc, /* special_function */
822 "R_PPC_DTPREL16_LO", /* name */
823 FALSE, /* partial_inplace */
824 0, /* src_mask */
825 0xffff, /* dst_mask */
826 FALSE), /* pcrel_offset */
827
828 /* Like DTPREL16_LO, but next higher group of 16 bits. */
829 HOWTO (R_PPC_DTPREL16_HI,
830 16, /* rightshift */
831 1, /* size (0 = byte, 1 = short, 2 = long) */
832 16, /* bitsize */
833 FALSE, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_dont, /* complain_on_overflow */
836 ppc_elf_unhandled_reloc, /* special_function */
837 "R_PPC_DTPREL16_HI", /* name */
838 FALSE, /* partial_inplace */
839 0, /* src_mask */
840 0xffff, /* dst_mask */
841 FALSE), /* pcrel_offset */
842
843 /* Like DTPREL16_HI, but adjust for low 16 bits. */
844 HOWTO (R_PPC_DTPREL16_HA,
845 16, /* rightshift */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
847 16, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 ppc_elf_unhandled_reloc, /* special_function */
852 "R_PPC_DTPREL16_HA", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* Computes a tp-relative displacement, the difference between the value of
859 sym+add and the value of the thread pointer (r13). */
860 HOWTO (R_PPC_TPREL32,
861 0, /* rightshift */
862 2, /* size (0 = byte, 1 = short, 2 = long) */
863 32, /* bitsize */
864 FALSE, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_dont, /* complain_on_overflow */
867 ppc_elf_unhandled_reloc, /* special_function */
868 "R_PPC_TPREL32", /* name */
869 FALSE, /* partial_inplace */
870 0, /* src_mask */
871 0xffffffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 /* A 16 bit tprel reloc. */
875 HOWTO (R_PPC_TPREL16,
876 0, /* rightshift */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
878 16, /* bitsize */
879 FALSE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_signed, /* complain_on_overflow */
882 ppc_elf_unhandled_reloc, /* special_function */
883 "R_PPC_TPREL16", /* name */
884 FALSE, /* partial_inplace */
885 0, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* Like TPREL16, but no overflow. */
890 HOWTO (R_PPC_TPREL16_LO,
891 0, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc_elf_unhandled_reloc, /* special_function */
898 "R_PPC_TPREL16_LO", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like TPREL16_LO, but next higher group of 16 bits. */
905 HOWTO (R_PPC_TPREL16_HI,
906 16, /* rightshift */
907 1, /* size (0 = byte, 1 = short, 2 = long) */
908 16, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 ppc_elf_unhandled_reloc, /* special_function */
913 "R_PPC_TPREL16_HI", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 0xffff, /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* Like TPREL16_HI, but adjust for low 16 bits. */
920 HOWTO (R_PPC_TPREL16_HA,
921 16, /* rightshift */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
923 16, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 ppc_elf_unhandled_reloc, /* special_function */
928 "R_PPC_TPREL16_HA", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
935 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
936 to the first entry. */
937 HOWTO (R_PPC_GOT_TLSGD16,
938 0, /* rightshift */
939 1, /* size (0 = byte, 1 = short, 2 = long) */
940 16, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_signed, /* complain_on_overflow */
944 ppc_elf_unhandled_reloc, /* special_function */
945 "R_PPC_GOT_TLSGD16", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 0xffff, /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* Like GOT_TLSGD16, but no overflow. */
952 HOWTO (R_PPC_GOT_TLSGD16_LO,
953 0, /* rightshift */
954 1, /* size (0 = byte, 1 = short, 2 = long) */
955 16, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc_elf_unhandled_reloc, /* special_function */
960 "R_PPC_GOT_TLSGD16_LO", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 0xffff, /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
967 HOWTO (R_PPC_GOT_TLSGD16_HI,
968 16, /* rightshift */
969 1, /* size (0 = byte, 1 = short, 2 = long) */
970 16, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont, /* complain_on_overflow */
974 ppc_elf_unhandled_reloc, /* special_function */
975 "R_PPC_GOT_TLSGD16_HI", /* name */
976 FALSE, /* partial_inplace */
977 0, /* src_mask */
978 0xffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
982 HOWTO (R_PPC_GOT_TLSGD16_HA,
983 16, /* rightshift */
984 1, /* size (0 = byte, 1 = short, 2 = long) */
985 16, /* bitsize */
986 FALSE, /* pc_relative */
987 0, /* bitpos */
988 complain_overflow_dont, /* complain_on_overflow */
989 ppc_elf_unhandled_reloc, /* special_function */
990 "R_PPC_GOT_TLSGD16_HA", /* name */
991 FALSE, /* partial_inplace */
992 0, /* src_mask */
993 0xffff, /* dst_mask */
994 FALSE), /* pcrel_offset */
995
996 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
997 with values (sym+add)@dtpmod and zero, and computes the offset to the
998 first entry. */
999 HOWTO (R_PPC_GOT_TLSLD16,
1000 0, /* rightshift */
1001 1, /* size (0 = byte, 1 = short, 2 = long) */
1002 16, /* bitsize */
1003 FALSE, /* pc_relative */
1004 0, /* bitpos */
1005 complain_overflow_signed, /* complain_on_overflow */
1006 ppc_elf_unhandled_reloc, /* special_function */
1007 "R_PPC_GOT_TLSLD16", /* name */
1008 FALSE, /* partial_inplace */
1009 0, /* src_mask */
1010 0xffff, /* dst_mask */
1011 FALSE), /* pcrel_offset */
1012
1013 /* Like GOT_TLSLD16, but no overflow. */
1014 HOWTO (R_PPC_GOT_TLSLD16_LO,
1015 0, /* rightshift */
1016 1, /* size (0 = byte, 1 = short, 2 = long) */
1017 16, /* bitsize */
1018 FALSE, /* pc_relative */
1019 0, /* bitpos */
1020 complain_overflow_dont, /* complain_on_overflow */
1021 ppc_elf_unhandled_reloc, /* special_function */
1022 "R_PPC_GOT_TLSLD16_LO", /* name */
1023 FALSE, /* partial_inplace */
1024 0, /* src_mask */
1025 0xffff, /* dst_mask */
1026 FALSE), /* pcrel_offset */
1027
1028 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1029 HOWTO (R_PPC_GOT_TLSLD16_HI,
1030 16, /* rightshift */
1031 1, /* size (0 = byte, 1 = short, 2 = long) */
1032 16, /* bitsize */
1033 FALSE, /* pc_relative */
1034 0, /* bitpos */
1035 complain_overflow_dont, /* complain_on_overflow */
1036 ppc_elf_unhandled_reloc, /* special_function */
1037 "R_PPC_GOT_TLSLD16_HI", /* name */
1038 FALSE, /* partial_inplace */
1039 0, /* src_mask */
1040 0xffff, /* dst_mask */
1041 FALSE), /* pcrel_offset */
1042
1043 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1044 HOWTO (R_PPC_GOT_TLSLD16_HA,
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont, /* complain_on_overflow */
1051 ppc_elf_unhandled_reloc, /* special_function */
1052 "R_PPC_GOT_TLSLD16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1059 the offset to the entry. */
1060 HOWTO (R_PPC_GOT_DTPREL16,
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_signed, /* complain_on_overflow */
1067 ppc_elf_unhandled_reloc, /* special_function */
1068 "R_PPC_GOT_DTPREL16", /* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xffff, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like GOT_DTPREL16, but no overflow. */
1075 HOWTO (R_PPC_GOT_DTPREL16_LO,
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_dont, /* complain_on_overflow */
1082 ppc_elf_unhandled_reloc, /* special_function */
1083 "R_PPC_GOT_DTPREL16_LO", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xffff, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1090 HOWTO (R_PPC_GOT_DTPREL16_HI,
1091 16, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont, /* complain_on_overflow */
1097 ppc_elf_unhandled_reloc, /* special_function */
1098 "R_PPC_GOT_DTPREL16_HI", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xffff, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1105 HOWTO (R_PPC_GOT_DTPREL16_HA,
1106 16, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc_elf_unhandled_reloc, /* special_function */
1113 "R_PPC_GOT_DTPREL16_HA", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xffff, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1120 offset to the entry. */
1121 HOWTO (R_PPC_GOT_TPREL16,
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_signed, /* complain_on_overflow */
1128 ppc_elf_unhandled_reloc, /* special_function */
1129 "R_PPC_GOT_TPREL16", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xffff, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like GOT_TPREL16, but no overflow. */
1136 HOWTO (R_PPC_GOT_TPREL16_LO,
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc_elf_unhandled_reloc, /* special_function */
1144 "R_PPC_GOT_TPREL16_LO", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xffff, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1151 HOWTO (R_PPC_GOT_TPREL16_HI,
1152 16, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_dont, /* complain_on_overflow */
1158 ppc_elf_unhandled_reloc, /* special_function */
1159 "R_PPC_GOT_TPREL16_HI", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xffff, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1166 HOWTO (R_PPC_GOT_TPREL16_HA,
1167 16, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc_elf_unhandled_reloc, /* special_function */
1174 "R_PPC_GOT_TPREL16_HA", /* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xffff, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* The remaining relocs are from the Embedded ELF ABI, and are not
1181 in the SVR4 ELF ABI. */
1182
1183 /* 32 bit value resulting from the addend minus the symbol. */
1184 HOWTO (R_PPC_EMB_NADDR32, /* type */
1185 0, /* rightshift */
1186 2, /* size (0 = byte, 1 = short, 2 = long) */
1187 32, /* bitsize */
1188 FALSE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_bitfield, /* complain_on_overflow */
1191 bfd_elf_generic_reloc, /* special_function */
1192 "R_PPC_EMB_NADDR32", /* name */
1193 FALSE, /* partial_inplace */
1194 0, /* src_mask */
1195 0xffffffff, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1197
1198 /* 16 bit value resulting from the addend minus the symbol. */
1199 HOWTO (R_PPC_EMB_NADDR16, /* type */
1200 0, /* rightshift */
1201 1, /* size (0 = byte, 1 = short, 2 = long) */
1202 16, /* bitsize */
1203 FALSE, /* pc_relative */
1204 0, /* bitpos */
1205 complain_overflow_bitfield, /* complain_on_overflow */
1206 bfd_elf_generic_reloc, /* special_function */
1207 "R_PPC_EMB_NADDR16", /* name */
1208 FALSE, /* partial_inplace */
1209 0, /* src_mask */
1210 0xffff, /* dst_mask */
1211 FALSE), /* pcrel_offset */
1212
1213 /* 16 bit value resulting from the addend minus the symbol. */
1214 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1215 0, /* rightshift */
1216 1, /* size (0 = byte, 1 = short, 2 = long) */
1217 16, /* bitsize */
1218 FALSE, /* pc_relative */
1219 0, /* bitpos */
1220 complain_overflow_dont,/* complain_on_overflow */
1221 bfd_elf_generic_reloc, /* special_function */
1222 "R_PPC_EMB_ADDR16_LO", /* name */
1223 FALSE, /* partial_inplace */
1224 0, /* src_mask */
1225 0xffff, /* dst_mask */
1226 FALSE), /* pcrel_offset */
1227
1228 /* The high order 16 bits of the addend minus the symbol. */
1229 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1230 16, /* rightshift */
1231 1, /* size (0 = byte, 1 = short, 2 = long) */
1232 16, /* bitsize */
1233 FALSE, /* pc_relative */
1234 0, /* bitpos */
1235 complain_overflow_dont, /* complain_on_overflow */
1236 bfd_elf_generic_reloc, /* special_function */
1237 "R_PPC_EMB_NADDR16_HI", /* name */
1238 FALSE, /* partial_inplace */
1239 0, /* src_mask */
1240 0xffff, /* dst_mask */
1241 FALSE), /* pcrel_offset */
1242
1243 /* The high order 16 bits of the result of the addend minus the address,
1244 plus 1 if the contents of the low 16 bits, treated as a signed number,
1245 is negative. */
1246 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1247 16, /* rightshift */
1248 1, /* size (0 = byte, 1 = short, 2 = long) */
1249 16, /* bitsize */
1250 FALSE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_dont, /* complain_on_overflow */
1253 ppc_elf_addr16_ha_reloc, /* special_function */
1254 "R_PPC_EMB_NADDR16_HA", /* name */
1255 FALSE, /* partial_inplace */
1256 0, /* src_mask */
1257 0xffff, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1259
1260 /* 16 bit value resulting from allocating a 4 byte word to hold an
1261 address in the .sdata section, and returning the offset from
1262 _SDA_BASE_ for that relocation. */
1263 HOWTO (R_PPC_EMB_SDAI16, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_bitfield, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_PPC_EMB_SDAI16", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xffff, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* 16 bit value resulting from allocating a 4 byte word to hold an
1278 address in the .sdata2 section, and returning the offset from
1279 _SDA2_BASE_ for that relocation. */
1280 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1281 0, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_bitfield, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_SDA2I16", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1295 small data items. */
1296 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1297 0, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_signed, /* complain_on_overflow */
1303 bfd_elf_generic_reloc, /* special_function */
1304 "R_PPC_EMB_SDA2REL", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1311 signed offset from the appropriate base, and filling in the register
1312 field with the appropriate register (0, 2, or 13). */
1313 HOWTO (R_PPC_EMB_SDA21, /* type */
1314 0, /* rightshift */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1316 16, /* bitsize */
1317 FALSE, /* pc_relative */
1318 0, /* bitpos */
1319 complain_overflow_signed, /* complain_on_overflow */
1320 bfd_elf_generic_reloc, /* special_function */
1321 "R_PPC_EMB_SDA21", /* name */
1322 FALSE, /* partial_inplace */
1323 0, /* src_mask */
1324 0xffff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 /* Relocation not handled: R_PPC_EMB_MRKREF */
1328 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1329 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1330 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1331 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1332 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1333
1334 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1335 in the 16 bit signed offset from the appropriate base, and filling in the
1336 register field with the appropriate register (0, 2, or 13). */
1337 HOWTO (R_PPC_EMB_RELSDA, /* type */
1338 0, /* rightshift */
1339 1, /* size (0 = byte, 1 = short, 2 = long) */
1340 16, /* bitsize */
1341 TRUE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_signed, /* complain_on_overflow */
1344 bfd_elf_generic_reloc, /* special_function */
1345 "R_PPC_EMB_RELSDA", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 0xffff, /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* A 16 bit relative relocation. */
1352 HOWTO (R_PPC_REL16, /* type */
1353 0, /* rightshift */
1354 1, /* size (0 = byte, 1 = short, 2 = long) */
1355 16, /* bitsize */
1356 TRUE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_bitfield, /* complain_on_overflow */
1359 bfd_elf_generic_reloc, /* special_function */
1360 "R_PPC_REL16", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 0xffff, /* dst_mask */
1364 TRUE), /* pcrel_offset */
1365
1366 /* A 16 bit relative relocation without overflow. */
1367 HOWTO (R_PPC_REL16_LO, /* type */
1368 0, /* rightshift */
1369 1, /* size (0 = byte, 1 = short, 2 = long) */
1370 16, /* bitsize */
1371 TRUE, /* pc_relative */
1372 0, /* bitpos */
1373 complain_overflow_dont,/* complain_on_overflow */
1374 bfd_elf_generic_reloc, /* special_function */
1375 "R_PPC_REL16_LO", /* name */
1376 FALSE, /* partial_inplace */
1377 0, /* src_mask */
1378 0xffff, /* dst_mask */
1379 TRUE), /* pcrel_offset */
1380
1381 /* The high order 16 bits of a relative address. */
1382 HOWTO (R_PPC_REL16_HI, /* type */
1383 16, /* rightshift */
1384 1, /* size (0 = byte, 1 = short, 2 = long) */
1385 16, /* bitsize */
1386 TRUE, /* pc_relative */
1387 0, /* bitpos */
1388 complain_overflow_dont, /* complain_on_overflow */
1389 bfd_elf_generic_reloc, /* special_function */
1390 "R_PPC_REL16_HI", /* name */
1391 FALSE, /* partial_inplace */
1392 0, /* src_mask */
1393 0xffff, /* dst_mask */
1394 TRUE), /* pcrel_offset */
1395
1396 /* The high order 16 bits of a relative address, plus 1 if the contents of
1397 the low 16 bits, treated as a signed number, is negative. */
1398 HOWTO (R_PPC_REL16_HA, /* type */
1399 16, /* rightshift */
1400 1, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 TRUE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_dont, /* complain_on_overflow */
1405 ppc_elf_addr16_ha_reloc, /* special_function */
1406 "R_PPC_REL16_HA", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 TRUE), /* pcrel_offset */
1411
1412 /* GNU extension to record C++ vtable hierarchy. */
1413 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1414 0, /* rightshift */
1415 0, /* size (0 = byte, 1 = short, 2 = long) */
1416 0, /* bitsize */
1417 FALSE, /* pc_relative */
1418 0, /* bitpos */
1419 complain_overflow_dont, /* complain_on_overflow */
1420 NULL, /* special_function */
1421 "R_PPC_GNU_VTINHERIT", /* name */
1422 FALSE, /* partial_inplace */
1423 0, /* src_mask */
1424 0, /* dst_mask */
1425 FALSE), /* pcrel_offset */
1426
1427 /* GNU extension to record C++ vtable member usage. */
1428 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1429 0, /* rightshift */
1430 0, /* size (0 = byte, 1 = short, 2 = long) */
1431 0, /* bitsize */
1432 FALSE, /* pc_relative */
1433 0, /* bitpos */
1434 complain_overflow_dont, /* complain_on_overflow */
1435 NULL, /* special_function */
1436 "R_PPC_GNU_VTENTRY", /* name */
1437 FALSE, /* partial_inplace */
1438 0, /* src_mask */
1439 0, /* dst_mask */
1440 FALSE), /* pcrel_offset */
1441
1442 /* Phony reloc to handle AIX style TOC entries. */
1443 HOWTO (R_PPC_TOC16, /* type */
1444 0, /* rightshift */
1445 1, /* size (0 = byte, 1 = short, 2 = long) */
1446 16, /* bitsize */
1447 FALSE, /* pc_relative */
1448 0, /* bitpos */
1449 complain_overflow_signed, /* complain_on_overflow */
1450 bfd_elf_generic_reloc, /* special_function */
1451 "R_PPC_TOC16", /* name */
1452 FALSE, /* partial_inplace */
1453 0, /* src_mask */
1454 0xffff, /* dst_mask */
1455 FALSE), /* pcrel_offset */
1456 };
1457 \f
1458 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1459
1460 static void
1461 ppc_elf_howto_init (void)
1462 {
1463 unsigned int i, type;
1464
1465 for (i = 0;
1466 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1467 i++)
1468 {
1469 type = ppc_elf_howto_raw[i].type;
1470 if (type >= (sizeof (ppc_elf_howto_table)
1471 / sizeof (ppc_elf_howto_table[0])))
1472 abort ();
1473 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1474 }
1475 }
1476
1477 static reloc_howto_type *
1478 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1479 bfd_reloc_code_real_type code)
1480 {
1481 enum elf_ppc_reloc_type r;
1482
1483 /* Initialize howto table if not already done. */
1484 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1485 ppc_elf_howto_init ();
1486
1487 switch (code)
1488 {
1489 default:
1490 return NULL;
1491
1492 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1493 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1494 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1495 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1496 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1497 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1498 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1499 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1500 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1501 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1502 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1503 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1504 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1505 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1506 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1507 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1508 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1509 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1510 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1511 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1512 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1513 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1514 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1515 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1516 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1517 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1518 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1519 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1520 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1521 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1522 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1523 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1524 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1525 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1526 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1527 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1528 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1529 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1530 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1531 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1532 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1533 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1534 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1535 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1536 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1537 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1538 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1541 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1542 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1545 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1546 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1549 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1550 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1553 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1554 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1555 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1558 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1559 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1560 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1561 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1562 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1563 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1564 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1565 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1566 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1567 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1568 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1569 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1570 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1571 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1572 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1573 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1574 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1575 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1576 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1577 }
1578
1579 return ppc_elf_howto_table[r];
1580 };
1581
1582 static reloc_howto_type *
1583 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1584 const char *r_name)
1585 {
1586 unsigned int i;
1587
1588 for (i = 0;
1589 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1590 i++)
1591 if (ppc_elf_howto_raw[i].name != NULL
1592 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1593 return &ppc_elf_howto_raw[i];
1594
1595 return NULL;
1596 }
1597
1598 /* Set the howto pointer for a PowerPC ELF reloc. */
1599
1600 static void
1601 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1602 arelent *cache_ptr,
1603 Elf_Internal_Rela *dst)
1604 {
1605 /* Initialize howto table if not already done. */
1606 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1607 ppc_elf_howto_init ();
1608
1609 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1610 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1611
1612 /* Just because the above assert didn't trigger doesn't mean that
1613 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1614 if (!cache_ptr->howto)
1615 {
1616 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1617 abfd, ELF32_R_TYPE (dst->r_info));
1618 bfd_set_error (bfd_error_bad_value);
1619
1620 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1621 }
1622 }
1623
1624 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1625
1626 static bfd_reloc_status_type
1627 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1628 arelent *reloc_entry,
1629 asymbol *symbol,
1630 void *data ATTRIBUTE_UNUSED,
1631 asection *input_section,
1632 bfd *output_bfd,
1633 char **error_message ATTRIBUTE_UNUSED)
1634 {
1635 bfd_vma relocation;
1636
1637 if (output_bfd != NULL)
1638 {
1639 reloc_entry->address += input_section->output_offset;
1640 return bfd_reloc_ok;
1641 }
1642
1643 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1644 return bfd_reloc_outofrange;
1645
1646 if (bfd_is_com_section (symbol->section))
1647 relocation = 0;
1648 else
1649 relocation = symbol->value;
1650
1651 relocation += symbol->section->output_section->vma;
1652 relocation += symbol->section->output_offset;
1653 relocation += reloc_entry->addend;
1654 if (reloc_entry->howto->pc_relative)
1655 relocation -= reloc_entry->address;
1656
1657 reloc_entry->addend += (relocation & 0x8000) << 1;
1658
1659 return bfd_reloc_continue;
1660 }
1661
1662 static bfd_reloc_status_type
1663 ppc_elf_unhandled_reloc (bfd *abfd,
1664 arelent *reloc_entry,
1665 asymbol *symbol,
1666 void *data,
1667 asection *input_section,
1668 bfd *output_bfd,
1669 char **error_message)
1670 {
1671 /* If this is a relocatable link (output_bfd test tells us), just
1672 call the generic function. Any adjustment will be done at final
1673 link time. */
1674 if (output_bfd != NULL)
1675 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1676 input_section, output_bfd, error_message);
1677
1678 if (error_message != NULL)
1679 {
1680 static char buf[60];
1681 sprintf (buf, _("generic linker can't handle %s"),
1682 reloc_entry->howto->name);
1683 *error_message = buf;
1684 }
1685 return bfd_reloc_dangerous;
1686 }
1687 \f
1688 /* Sections created by the linker. */
1689
1690 typedef struct elf_linker_section
1691 {
1692 /* Pointer to the bfd section. */
1693 asection *section;
1694 /* Section name. */
1695 const char *name;
1696 /* Associated bss section name. */
1697 const char *bss_name;
1698 /* Associated symbol name. */
1699 const char *sym_name;
1700 /* Associated symbol. */
1701 struct elf_link_hash_entry *sym;
1702 } elf_linker_section_t;
1703
1704 /* Linked list of allocated pointer entries. This hangs off of the
1705 symbol lists, and provides allows us to return different pointers,
1706 based on different addend's. */
1707
1708 typedef struct elf_linker_section_pointers
1709 {
1710 /* next allocated pointer for this symbol */
1711 struct elf_linker_section_pointers *next;
1712 /* offset of pointer from beginning of section */
1713 bfd_vma offset;
1714 /* addend used */
1715 bfd_vma addend;
1716 /* which linker section this is */
1717 elf_linker_section_t *lsect;
1718 } elf_linker_section_pointers_t;
1719
1720 struct ppc_elf_obj_tdata
1721 {
1722 struct elf_obj_tdata elf;
1723
1724 /* A mapping from local symbols to offsets into the various linker
1725 sections added. This is index by the symbol index. */
1726 elf_linker_section_pointers_t **linker_section_pointers;
1727
1728 /* Flags used to auto-detect plt type. */
1729 unsigned int makes_plt_call : 1;
1730 unsigned int has_rel16 : 1;
1731 };
1732
1733 #define ppc_elf_tdata(bfd) \
1734 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1735
1736 #define elf_local_ptr_offsets(bfd) \
1737 (ppc_elf_tdata (bfd)->linker_section_pointers)
1738
1739 #define is_ppc_elf(bfd) \
1740 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1741 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1742
1743 /* Override the generic function because we store some extras. */
1744
1745 static bfd_boolean
1746 ppc_elf_mkobject (bfd *abfd)
1747 {
1748 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1749 PPC32_ELF_TDATA);
1750 }
1751
1752 /* Fix bad default arch selected for a 32 bit input bfd when the
1753 default is 64 bit. */
1754
1755 static bfd_boolean
1756 ppc_elf_object_p (bfd *abfd)
1757 {
1758 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1759 {
1760 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1761
1762 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1763 {
1764 /* Relies on arch after 64 bit default being 32 bit default. */
1765 abfd->arch_info = abfd->arch_info->next;
1766 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1767 }
1768 }
1769 return TRUE;
1770 }
1771
1772 /* Function to set whether a module needs the -mrelocatable bit set. */
1773
1774 static bfd_boolean
1775 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1776 {
1777 BFD_ASSERT (!elf_flags_init (abfd)
1778 || elf_elfheader (abfd)->e_flags == flags);
1779
1780 elf_elfheader (abfd)->e_flags = flags;
1781 elf_flags_init (abfd) = TRUE;
1782 return TRUE;
1783 }
1784
1785 /* Support for core dump NOTE sections. */
1786
1787 static bfd_boolean
1788 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1789 {
1790 int offset;
1791 unsigned int size;
1792
1793 switch (note->descsz)
1794 {
1795 default:
1796 return FALSE;
1797
1798 case 268: /* Linux/PPC. */
1799 /* pr_cursig */
1800 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1801
1802 /* pr_pid */
1803 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1804
1805 /* pr_reg */
1806 offset = 72;
1807 size = 192;
1808
1809 break;
1810 }
1811
1812 /* Make a ".reg/999" section. */
1813 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1814 size, note->descpos + offset);
1815 }
1816
1817 static bfd_boolean
1818 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1819 {
1820 switch (note->descsz)
1821 {
1822 default:
1823 return FALSE;
1824
1825 case 128: /* Linux/PPC elf_prpsinfo. */
1826 elf_tdata (abfd)->core_program
1827 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1828 elf_tdata (abfd)->core_command
1829 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1830 }
1831
1832 /* Note that for some reason, a spurious space is tacked
1833 onto the end of the args in some (at least one anyway)
1834 implementations, so strip it off if it exists. */
1835
1836 {
1837 char *command = elf_tdata (abfd)->core_command;
1838 int n = strlen (command);
1839
1840 if (0 < n && command[n - 1] == ' ')
1841 command[n - 1] = '\0';
1842 }
1843
1844 return TRUE;
1845 }
1846
1847 static char *
1848 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1849 {
1850 switch (note_type)
1851 {
1852 default:
1853 return NULL;
1854
1855 case NT_PRPSINFO:
1856 {
1857 char data[128];
1858 va_list ap;
1859
1860 va_start (ap, note_type);
1861 memset (data, 0, 32);
1862 strncpy (data + 32, va_arg (ap, const char *), 16);
1863 strncpy (data + 48, va_arg (ap, const char *), 80);
1864 va_end (ap);
1865 return elfcore_write_note (abfd, buf, bufsiz,
1866 "CORE", note_type, data, sizeof (data));
1867 }
1868
1869 case NT_PRSTATUS:
1870 {
1871 char data[268];
1872 va_list ap;
1873 long pid;
1874 int cursig;
1875 const void *greg;
1876
1877 va_start (ap, note_type);
1878 memset (data, 0, 72);
1879 pid = va_arg (ap, long);
1880 bfd_put_32 (abfd, pid, data + 24);
1881 cursig = va_arg (ap, int);
1882 bfd_put_16 (abfd, cursig, data + 12);
1883 greg = va_arg (ap, const void *);
1884 memcpy (data + 72, greg, 192);
1885 memset (data + 264, 0, 4);
1886 va_end (ap);
1887 return elfcore_write_note (abfd, buf, bufsiz,
1888 "CORE", note_type, data, sizeof (data));
1889 }
1890 }
1891 }
1892
1893 /* Return address for Ith PLT stub in section PLT, for relocation REL
1894 or (bfd_vma) -1 if it should not be included. */
1895
1896 static bfd_vma
1897 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1898 const asection *plt ATTRIBUTE_UNUSED,
1899 const arelent *rel)
1900 {
1901 return rel->address;
1902 }
1903
1904 /* Handle a PowerPC specific section when reading an object file. This
1905 is called when bfd_section_from_shdr finds a section with an unknown
1906 type. */
1907
1908 static bfd_boolean
1909 ppc_elf_section_from_shdr (bfd *abfd,
1910 Elf_Internal_Shdr *hdr,
1911 const char *name,
1912 int shindex)
1913 {
1914 asection *newsect;
1915 flagword flags;
1916
1917 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1918 return FALSE;
1919
1920 newsect = hdr->bfd_section;
1921 flags = bfd_get_section_flags (abfd, newsect);
1922 if (hdr->sh_flags & SHF_EXCLUDE)
1923 flags |= SEC_EXCLUDE;
1924
1925 if (hdr->sh_type == SHT_ORDERED)
1926 flags |= SEC_SORT_ENTRIES;
1927
1928 bfd_set_section_flags (abfd, newsect, flags);
1929 return TRUE;
1930 }
1931
1932 /* Set up any other section flags and such that may be necessary. */
1933
1934 static bfd_boolean
1935 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1936 Elf_Internal_Shdr *shdr,
1937 asection *asect)
1938 {
1939 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1940 shdr->sh_flags |= SHF_EXCLUDE;
1941
1942 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1943 shdr->sh_type = SHT_ORDERED;
1944
1945 return TRUE;
1946 }
1947
1948 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1949 need to bump up the number of section headers. */
1950
1951 static int
1952 ppc_elf_additional_program_headers (bfd *abfd,
1953 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1954 {
1955 asection *s;
1956 int ret = 0;
1957
1958 s = bfd_get_section_by_name (abfd, ".sbss2");
1959 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1960 ++ret;
1961
1962 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1963 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1964 ++ret;
1965
1966 return ret;
1967 }
1968
1969 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1970 .PPC.EMB.sbss0 a normal section, and not a bss section so
1971 that the linker doesn't crater when trying to make more than
1972 2 sections. */
1973
1974 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1975 {
1976 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1977 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1978 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1979 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1980 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1981 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1982 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1983 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1984 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1985 { NULL, 0, 0, 0, 0 }
1986 };
1987
1988 /* This is what we want for new plt/got. */
1989 static struct bfd_elf_special_section ppc_alt_plt =
1990 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1991
1992 static const struct bfd_elf_special_section *
1993 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1994 {
1995 const struct bfd_elf_special_section *ssect;
1996
1997 /* See if this is one of the special sections. */
1998 if (sec->name == NULL)
1999 return NULL;
2000
2001 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2002 sec->use_rela_p);
2003 if (ssect != NULL)
2004 {
2005 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2006 ssect = &ppc_alt_plt;
2007 return ssect;
2008 }
2009
2010 return _bfd_elf_get_sec_type_attr (abfd, sec);
2011 }
2012 \f
2013 /* Very simple linked list structure for recording apuinfo values. */
2014 typedef struct apuinfo_list
2015 {
2016 struct apuinfo_list *next;
2017 unsigned long value;
2018 }
2019 apuinfo_list;
2020
2021 static apuinfo_list *head;
2022
2023
2024 static void
2025 apuinfo_list_init (void)
2026 {
2027 head = NULL;
2028 }
2029
2030 static void
2031 apuinfo_list_add (unsigned long value)
2032 {
2033 apuinfo_list *entry = head;
2034
2035 while (entry != NULL)
2036 {
2037 if (entry->value == value)
2038 return;
2039 entry = entry->next;
2040 }
2041
2042 entry = bfd_malloc (sizeof (* entry));
2043 if (entry == NULL)
2044 return;
2045
2046 entry->value = value;
2047 entry->next = head;
2048 head = entry;
2049 }
2050
2051 static unsigned
2052 apuinfo_list_length (void)
2053 {
2054 apuinfo_list *entry;
2055 unsigned long count;
2056
2057 for (entry = head, count = 0;
2058 entry;
2059 entry = entry->next)
2060 ++ count;
2061
2062 return count;
2063 }
2064
2065 static inline unsigned long
2066 apuinfo_list_element (unsigned long number)
2067 {
2068 apuinfo_list * entry;
2069
2070 for (entry = head;
2071 entry && number --;
2072 entry = entry->next)
2073 ;
2074
2075 return entry ? entry->value : 0;
2076 }
2077
2078 static void
2079 apuinfo_list_finish (void)
2080 {
2081 apuinfo_list *entry;
2082
2083 for (entry = head; entry;)
2084 {
2085 apuinfo_list *next = entry->next;
2086 free (entry);
2087 entry = next;
2088 }
2089
2090 head = NULL;
2091 }
2092
2093 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2094 #define APUINFO_LABEL "APUinfo"
2095
2096 /* Scan the input BFDs and create a linked list of
2097 the APUinfo values that will need to be emitted. */
2098
2099 static void
2100 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2101 {
2102 bfd *ibfd;
2103 asection *asec;
2104 char *buffer;
2105 unsigned num_input_sections;
2106 bfd_size_type output_section_size;
2107 unsigned i;
2108 unsigned num_entries;
2109 unsigned long offset;
2110 unsigned long length;
2111 const char *error_message = NULL;
2112
2113 if (link_info == NULL)
2114 return;
2115
2116 /* Scan the input bfds, looking for apuinfo sections. */
2117 num_input_sections = 0;
2118 output_section_size = 0;
2119
2120 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2121 {
2122 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2123 if (asec)
2124 {
2125 ++ num_input_sections;
2126 output_section_size += asec->size;
2127 }
2128 }
2129
2130 /* We need at least one input sections
2131 in order to make merging worthwhile. */
2132 if (num_input_sections < 1)
2133 return;
2134
2135 /* Just make sure that the output section exists as well. */
2136 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2137 if (asec == NULL)
2138 return;
2139
2140 /* Allocate a buffer for the contents of the input sections. */
2141 buffer = bfd_malloc (output_section_size);
2142 if (buffer == NULL)
2143 return;
2144
2145 offset = 0;
2146 apuinfo_list_init ();
2147
2148 /* Read in the input sections contents. */
2149 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2150 {
2151 unsigned long datum;
2152 char *ptr;
2153
2154 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2155 if (asec == NULL)
2156 continue;
2157
2158 length = asec->size;
2159 if (length < 24)
2160 {
2161 error_message = _("corrupt or empty %s section in %B");
2162 goto fail;
2163 }
2164
2165 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2166 || (bfd_bread (buffer + offset, length, ibfd) != length))
2167 {
2168 error_message = _("unable to read in %s section from %B");
2169 goto fail;
2170 }
2171
2172 /* Process the contents of the section. */
2173 ptr = buffer + offset;
2174 error_message = _("corrupt %s section in %B");
2175
2176 /* Verify the contents of the header. Note - we have to
2177 extract the values this way in order to allow for a
2178 host whose endian-ness is different from the target. */
2179 datum = bfd_get_32 (ibfd, ptr);
2180 if (datum != sizeof APUINFO_LABEL)
2181 goto fail;
2182
2183 datum = bfd_get_32 (ibfd, ptr + 8);
2184 if (datum != 0x2)
2185 goto fail;
2186
2187 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2188 goto fail;
2189
2190 /* Get the number of bytes used for apuinfo entries. */
2191 datum = bfd_get_32 (ibfd, ptr + 4);
2192 if (datum + 20 != length)
2193 goto fail;
2194
2195 /* Make sure that we do not run off the end of the section. */
2196 if (offset + length > output_section_size)
2197 goto fail;
2198
2199 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2200 for (i = 0; i < datum; i += 4)
2201 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2202
2203 /* Update the offset. */
2204 offset += length;
2205 }
2206
2207 error_message = NULL;
2208
2209 /* Compute the size of the output section. */
2210 num_entries = apuinfo_list_length ();
2211 output_section_size = 20 + num_entries * 4;
2212
2213 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2214
2215 if (! bfd_set_section_size (abfd, asec, output_section_size))
2216 ibfd = abfd,
2217 error_message = _("warning: unable to set size of %s section in %B");
2218
2219 fail:
2220 free (buffer);
2221
2222 if (error_message)
2223 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2224 }
2225
2226 /* Prevent the output section from accumulating the input sections'
2227 contents. We have already stored this in our linked list structure. */
2228
2229 static bfd_boolean
2230 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2231 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2232 asection *asec,
2233 bfd_byte *contents ATTRIBUTE_UNUSED)
2234 {
2235 return (apuinfo_list_length ()
2236 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2237 }
2238
2239 /* Finally we can generate the output section. */
2240
2241 static void
2242 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2243 {
2244 bfd_byte *buffer;
2245 asection *asec;
2246 unsigned i;
2247 unsigned num_entries;
2248 bfd_size_type length;
2249
2250 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2251 if (asec == NULL)
2252 return;
2253
2254 if (apuinfo_list_length () == 0)
2255 return;
2256
2257 length = asec->size;
2258 if (length < 20)
2259 return;
2260
2261 buffer = bfd_malloc (length);
2262 if (buffer == NULL)
2263 {
2264 (*_bfd_error_handler)
2265 (_("failed to allocate space for new APUinfo section."));
2266 return;
2267 }
2268
2269 /* Create the apuinfo header. */
2270 num_entries = apuinfo_list_length ();
2271 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2272 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2273 bfd_put_32 (abfd, 0x2, buffer + 8);
2274 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2275
2276 length = 20;
2277 for (i = 0; i < num_entries; i++)
2278 {
2279 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2280 length += 4;
2281 }
2282
2283 if (length != asec->size)
2284 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2285
2286 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2287 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2288
2289 free (buffer);
2290
2291 apuinfo_list_finish ();
2292 }
2293 \f
2294 static bfd_boolean
2295 is_pic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2296 {
2297 bfd_byte buf[16];
2298 unsigned int insn;
2299
2300 if (!bfd_get_section_contents (abfd, glink, buf, off, 16))
2301 return FALSE;
2302
2303 insn = bfd_get_32 (abfd, buf);
2304 if ((insn & 0xffff0000) == LWZ_11_30
2305 && bfd_get_32 (abfd, buf + 4) == MTCTR_11
2306 && bfd_get_32 (abfd, buf + 8) == BCTR)
2307 return TRUE;
2308
2309 if ((insn & 0xffff0000) == ADDIS_11_30
2310 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2311 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2312 && bfd_get_32 (abfd, buf + 12) == BCTR)
2313 return TRUE;
2314 return FALSE;
2315 }
2316
2317 static bfd_boolean
2318 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2319 {
2320 bfd_vma vma = *(bfd_vma *) ptr;
2321 return ((section->flags & SEC_ALLOC) != 0
2322 && section->vma <= vma
2323 && vma < section->vma + section->size);
2324 }
2325
2326 static long
2327 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2328 long dynsymcount, asymbol **dynsyms,
2329 asymbol **ret)
2330 {
2331 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2332 asection *plt, *relplt, *dynamic, *glink;
2333 bfd_vma glink_vma = 0;
2334 bfd_vma resolv_vma = 0;
2335 bfd_vma stub_vma;
2336 asymbol *s;
2337 arelent *p;
2338 long count, i;
2339 size_t size;
2340 char *names;
2341 bfd_byte buf[4];
2342
2343 *ret = NULL;
2344
2345 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2346 return 0;
2347
2348 if (dynsymcount <= 0)
2349 return 0;
2350
2351 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2352 if (relplt == NULL)
2353 return 0;
2354
2355 plt = bfd_get_section_by_name (abfd, ".plt");
2356 if (plt == NULL)
2357 return 0;
2358
2359 /* Call common code to handle old-style executable PLTs. */
2360 if (elf_section_flags (plt) & SHF_EXECINSTR)
2361 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2362 dynsymcount, dynsyms, ret);
2363
2364 /* If this object was prelinked, the prelinker stored the address
2365 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2366 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2367 if (dynamic != NULL)
2368 {
2369 bfd_byte *dynbuf, *extdyn, *extdynend;
2370 size_t extdynsize;
2371 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2372
2373 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2374 return -1;
2375
2376 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2377 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2378
2379 extdyn = dynbuf;
2380 extdynend = extdyn + dynamic->size;
2381 for (; extdyn < extdynend; extdyn += extdynsize)
2382 {
2383 Elf_Internal_Dyn dyn;
2384 (*swap_dyn_in) (abfd, extdyn, &dyn);
2385
2386 if (dyn.d_tag == DT_NULL)
2387 break;
2388
2389 if (dyn.d_tag == DT_PPC_GOT)
2390 {
2391 unsigned int g_o_t = dyn.d_un.d_val;
2392 asection *got = bfd_get_section_by_name (abfd, ".got");
2393 if (got != NULL
2394 && bfd_get_section_contents (abfd, got, buf,
2395 g_o_t - got->vma + 4, 4))
2396 glink_vma = bfd_get_32 (abfd, buf);
2397 break;
2398 }
2399 }
2400 free (dynbuf);
2401 }
2402
2403 /* Otherwise we read the first plt entry. */
2404 if (glink_vma == 0)
2405 {
2406 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2407 glink_vma = bfd_get_32 (abfd, buf);
2408 }
2409
2410 if (glink_vma == 0)
2411 return 0;
2412
2413 /* The .glink section usually does not survive the final
2414 link; search for the section (usually .text) where the
2415 glink stubs now reside. */
2416 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2417 if (glink == NULL)
2418 return 0;
2419
2420 /* Determine glink PLT resolver by reading the relative branch
2421 from the first glink stub. */
2422 if (bfd_get_section_contents (abfd, glink, buf,
2423 glink_vma - glink->vma, 4))
2424 {
2425 unsigned int insn = bfd_get_32 (abfd, buf);
2426
2427 /* The first glink stub may either branch to the resolver ... */
2428 insn ^= B;
2429 if ((insn & ~0x3fffffc) == 0)
2430 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2431
2432 /* ... or fall through a bunch of NOPs. */
2433 else if ((insn ^ B ^ NOP) == 0)
2434 for (i = 4;
2435 bfd_get_section_contents (abfd, glink, buf,
2436 glink_vma - glink->vma + i, 4);
2437 i += 4)
2438 if (bfd_get_32 (abfd, buf) != NOP)
2439 {
2440 resolv_vma = glink_vma + i;
2441 break;
2442 }
2443 }
2444
2445 count = relplt->size / sizeof (Elf32_External_Rela);
2446 stub_vma = glink_vma - (bfd_vma) count * 16;
2447 /* If the stubs are those for -shared/-pie then we might have
2448 multiple stubs for each plt entry. If that is the case then
2449 there is no way to associate stubs with their plt entries short
2450 of figuring out the GOT pointer value used in the stub. */
2451 if (!bfd_get_section_contents (abfd, glink, buf,
2452 stub_vma - glink->vma, 4)
2453 || ((bfd_get_32 (abfd, buf) & 0xffff0000) != LIS_11
2454 && is_pic_glink_stub (abfd, glink, stub_vma - glink->vma - 16)))
2455 return 0;
2456
2457 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2458 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2459 return -1;
2460
2461 size = count * sizeof (asymbol);
2462 p = relplt->relocation;
2463 for (i = 0; i < count; i++, p++)
2464 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2465
2466 size += sizeof (asymbol) + sizeof ("__glink");
2467
2468 if (resolv_vma)
2469 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2470
2471 s = *ret = bfd_malloc (size);
2472 if (s == NULL)
2473 return -1;
2474
2475 names = (char *) (s + count + 1 + (resolv_vma != 0));
2476 p = relplt->relocation;
2477 for (i = 0; i < count; i++, p++)
2478 {
2479 size_t len;
2480
2481 *s = **p->sym_ptr_ptr;
2482 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2483 we are defining a symbol, ensure one of them is set. */
2484 if ((s->flags & BSF_LOCAL) == 0)
2485 s->flags |= BSF_GLOBAL;
2486 s->flags |= BSF_SYNTHETIC;
2487 s->section = glink;
2488 s->value = stub_vma - glink->vma;
2489 s->name = names;
2490 s->udata.p = NULL;
2491 len = strlen ((*p->sym_ptr_ptr)->name);
2492 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2493 names += len;
2494 memcpy (names, "@plt", sizeof ("@plt"));
2495 names += sizeof ("@plt");
2496 ++s;
2497 stub_vma += 16;
2498 }
2499
2500 /* Add a symbol at the start of the glink branch table. */
2501 memset (s, 0, sizeof *s);
2502 s->the_bfd = abfd;
2503 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2504 s->section = glink;
2505 s->value = glink_vma - glink->vma;
2506 s->name = names;
2507 memcpy (names, "__glink", sizeof ("__glink"));
2508 names += sizeof ("__glink");
2509 s++;
2510 count++;
2511
2512 if (resolv_vma)
2513 {
2514 /* Add a symbol for the glink PLT resolver. */
2515 memset (s, 0, sizeof *s);
2516 s->the_bfd = abfd;
2517 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2518 s->section = glink;
2519 s->value = resolv_vma - glink->vma;
2520 s->name = names;
2521 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2522 names += sizeof ("__glink_PLTresolve");
2523 s++;
2524 count++;
2525 }
2526
2527 return count;
2528 }
2529 \f
2530 /* The following functions are specific to the ELF linker, while
2531 functions above are used generally. They appear in this file more
2532 or less in the order in which they are called. eg.
2533 ppc_elf_check_relocs is called early in the link process,
2534 ppc_elf_finish_dynamic_sections is one of the last functions
2535 called. */
2536
2537 /* The PPC linker needs to keep track of the number of relocs that it
2538 decides to copy as dynamic relocs in check_relocs for each symbol.
2539 This is so that it can later discard them if they are found to be
2540 unnecessary. We store the information in a field extending the
2541 regular ELF linker hash table. */
2542
2543 struct ppc_elf_dyn_relocs
2544 {
2545 struct ppc_elf_dyn_relocs *next;
2546
2547 /* The input section of the reloc. */
2548 asection *sec;
2549
2550 /* Total number of relocs copied for the input section. */
2551 bfd_size_type count;
2552
2553 /* Number of pc-relative relocs copied for the input section. */
2554 bfd_size_type pc_count;
2555 };
2556
2557 /* Track PLT entries needed for a given symbol. We might need more
2558 than one glink entry per symbol. */
2559 struct plt_entry
2560 {
2561 struct plt_entry *next;
2562
2563 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2564 This field stores the offset into .got2 used to initialise the
2565 GOT pointer reg. It will always be at least 32768 (and for
2566 current gcc this is the only offset used). */
2567 bfd_vma addend;
2568
2569 /* The .got2 section. */
2570 asection *sec;
2571
2572 /* PLT refcount or offset. */
2573 union
2574 {
2575 bfd_signed_vma refcount;
2576 bfd_vma offset;
2577 } plt;
2578
2579 /* .glink stub offset. */
2580 bfd_vma glink_offset;
2581 };
2582
2583 /* Of those relocs that might be copied as dynamic relocs, this function
2584 selects those that must be copied when linking a shared library,
2585 even when the symbol is local. */
2586
2587 static int
2588 must_be_dyn_reloc (struct bfd_link_info *info,
2589 enum elf_ppc_reloc_type r_type)
2590 {
2591 switch (r_type)
2592 {
2593 default:
2594 return 1;
2595
2596 case R_PPC_REL24:
2597 case R_PPC_REL14:
2598 case R_PPC_REL14_BRTAKEN:
2599 case R_PPC_REL14_BRNTAKEN:
2600 case R_PPC_REL32:
2601 return 0;
2602
2603 case R_PPC_TPREL32:
2604 case R_PPC_TPREL16:
2605 case R_PPC_TPREL16_LO:
2606 case R_PPC_TPREL16_HI:
2607 case R_PPC_TPREL16_HA:
2608 return !info->executable;
2609 }
2610 }
2611
2612 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2613 copying dynamic variables from a shared lib into an app's dynbss
2614 section, and instead use a dynamic relocation to point into the
2615 shared lib. */
2616 #define ELIMINATE_COPY_RELOCS 1
2617
2618 /* PPC ELF linker hash entry. */
2619
2620 struct ppc_elf_link_hash_entry
2621 {
2622 struct elf_link_hash_entry elf;
2623
2624 /* If this symbol is used in the linker created sections, the processor
2625 specific backend uses this field to map the field into the offset
2626 from the beginning of the section. */
2627 elf_linker_section_pointers_t *linker_section_pointer;
2628
2629 /* Track dynamic relocs copied for this symbol. */
2630 struct ppc_elf_dyn_relocs *dyn_relocs;
2631
2632 /* Contexts in which symbol is used in the GOT (or TOC).
2633 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2634 corresponding relocs are encountered during check_relocs.
2635 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2636 indicate the corresponding GOT entry type is not needed. */
2637 #define TLS_GD 1 /* GD reloc. */
2638 #define TLS_LD 2 /* LD reloc. */
2639 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2640 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2641 #define TLS_TLS 16 /* Any TLS reloc. */
2642 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2643 char tls_mask;
2644
2645 /* Nonzero if we have seen a small data relocation referring to this
2646 symbol. */
2647 unsigned char has_sda_refs;
2648 };
2649
2650 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2651
2652 /* PPC ELF linker hash table. */
2653
2654 struct ppc_elf_link_hash_table
2655 {
2656 struct elf_link_hash_table elf;
2657
2658 /* Short-cuts to get to dynamic linker sections. */
2659 asection *got;
2660 asection *relgot;
2661 asection *glink;
2662 asection *plt;
2663 asection *relplt;
2664 asection *dynbss;
2665 asection *relbss;
2666 asection *dynsbss;
2667 asection *relsbss;
2668 elf_linker_section_t sdata[2];
2669 asection *sbss;
2670
2671 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2672 asection *srelplt2;
2673
2674 /* The .got.plt section (VxWorks only)*/
2675 asection *sgotplt;
2676
2677 /* Shortcut to __tls_get_addr. */
2678 struct elf_link_hash_entry *tls_get_addr;
2679
2680 /* The bfd that forced an old-style PLT. */
2681 bfd *old_bfd;
2682
2683 /* TLS local dynamic got entry handling. */
2684 union {
2685 bfd_signed_vma refcount;
2686 bfd_vma offset;
2687 } tlsld_got;
2688
2689 /* Offset of PltResolve function in glink. */
2690 bfd_vma glink_pltresolve;
2691
2692 /* Size of reserved GOT entries. */
2693 unsigned int got_header_size;
2694 /* Non-zero if allocating the header left a gap. */
2695 unsigned int got_gap;
2696
2697 /* The type of PLT we have chosen to use. */
2698 enum ppc_elf_plt_type plt_type;
2699
2700 /* Set if we should emit symbols for stubs. */
2701 unsigned int emit_stub_syms:1;
2702
2703 /* True if the target system is VxWorks. */
2704 unsigned int is_vxworks:1;
2705
2706 /* The size of PLT entries. */
2707 int plt_entry_size;
2708 /* The distance between adjacent PLT slots. */
2709 int plt_slot_size;
2710 /* The size of the first PLT entry. */
2711 int plt_initial_entry_size;
2712
2713 /* Small local sym to section mapping cache. */
2714 struct sym_sec_cache sym_sec;
2715 };
2716
2717 /* Get the PPC ELF linker hash table from a link_info structure. */
2718
2719 #define ppc_elf_hash_table(p) \
2720 ((struct ppc_elf_link_hash_table *) (p)->hash)
2721
2722 /* Create an entry in a PPC ELF linker hash table. */
2723
2724 static struct bfd_hash_entry *
2725 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2726 struct bfd_hash_table *table,
2727 const char *string)
2728 {
2729 /* Allocate the structure if it has not already been allocated by a
2730 subclass. */
2731 if (entry == NULL)
2732 {
2733 entry = bfd_hash_allocate (table,
2734 sizeof (struct ppc_elf_link_hash_entry));
2735 if (entry == NULL)
2736 return entry;
2737 }
2738
2739 /* Call the allocation method of the superclass. */
2740 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2741 if (entry != NULL)
2742 {
2743 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2744 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2745 ppc_elf_hash_entry (entry)->tls_mask = 0;
2746 }
2747
2748 return entry;
2749 }
2750
2751 /* Create a PPC ELF linker hash table. */
2752
2753 static struct bfd_link_hash_table *
2754 ppc_elf_link_hash_table_create (bfd *abfd)
2755 {
2756 struct ppc_elf_link_hash_table *ret;
2757
2758 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2759 if (ret == NULL)
2760 return NULL;
2761
2762 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2763 ppc_elf_link_hash_newfunc,
2764 sizeof (struct ppc_elf_link_hash_entry)))
2765 {
2766 free (ret);
2767 return NULL;
2768 }
2769
2770 ret->elf.init_plt_refcount.refcount = 0;
2771 ret->elf.init_plt_refcount.glist = NULL;
2772 ret->elf.init_plt_offset.offset = 0;
2773 ret->elf.init_plt_offset.glist = NULL;
2774
2775 ret->sdata[0].name = ".sdata";
2776 ret->sdata[0].sym_name = "_SDA_BASE_";
2777 ret->sdata[0].bss_name = ".sbss";
2778
2779 ret->sdata[1].name = ".sdata2";
2780 ret->sdata[1].sym_name = "_SDA2_BASE_";
2781 ret->sdata[1].bss_name = ".sbss2";
2782
2783 ret->plt_entry_size = 12;
2784 ret->plt_slot_size = 8;
2785 ret->plt_initial_entry_size = 72;
2786
2787 return &ret->elf.root;
2788 }
2789
2790 /* Create .got and the related sections. */
2791
2792 static bfd_boolean
2793 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2794 {
2795 struct ppc_elf_link_hash_table *htab;
2796 asection *s;
2797 flagword flags;
2798
2799 if (!_bfd_elf_create_got_section (abfd, info))
2800 return FALSE;
2801
2802 htab = ppc_elf_hash_table (info);
2803 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2804 if (s == NULL)
2805 abort ();
2806
2807 if (htab->is_vxworks)
2808 {
2809 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2810 if (!htab->sgotplt)
2811 abort ();
2812 }
2813 else
2814 {
2815 /* The powerpc .got has a blrl instruction in it. Mark it
2816 executable. */
2817 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2818 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2819 if (!bfd_set_section_flags (abfd, s, flags))
2820 return FALSE;
2821 }
2822
2823 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2824 | SEC_LINKER_CREATED | SEC_READONLY);
2825 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2826 if (!htab->relgot
2827 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2828 return FALSE;
2829
2830 return TRUE;
2831 }
2832
2833 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2834 to output sections (just like _bfd_elf_create_dynamic_sections has
2835 to create .dynbss and .rela.bss). */
2836
2837 static bfd_boolean
2838 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2839 {
2840 struct ppc_elf_link_hash_table *htab;
2841 asection *s;
2842 flagword flags;
2843
2844 htab = ppc_elf_hash_table (info);
2845
2846 if (htab->got == NULL
2847 && !ppc_elf_create_got (abfd, info))
2848 return FALSE;
2849
2850 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2851 return FALSE;
2852
2853 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2854 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2855
2856 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2857 htab->glink = s;
2858 if (s == NULL
2859 || !bfd_set_section_alignment (abfd, s, 4))
2860 return FALSE;
2861
2862 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2863 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2864 SEC_ALLOC | SEC_LINKER_CREATED);
2865 htab->dynsbss = s;
2866 if (s == NULL)
2867 return FALSE;
2868
2869 if (! info->shared)
2870 {
2871 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2872 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2873 htab->relsbss = s;
2874 if (s == NULL
2875 || ! bfd_set_section_alignment (abfd, s, 2))
2876 return FALSE;
2877 }
2878
2879 if (htab->is_vxworks
2880 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2881 return FALSE;
2882
2883 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2884 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2885 if (s == NULL)
2886 abort ();
2887
2888 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2889 if (htab->plt_type == PLT_VXWORKS)
2890 /* The VxWorks PLT is a loaded section with contents. */
2891 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2892 return bfd_set_section_flags (abfd, s, flags);
2893 }
2894
2895 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2896
2897 static void
2898 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2899 struct elf_link_hash_entry *dir,
2900 struct elf_link_hash_entry *ind)
2901 {
2902 struct ppc_elf_link_hash_entry *edir, *eind;
2903
2904 edir = (struct ppc_elf_link_hash_entry *) dir;
2905 eind = (struct ppc_elf_link_hash_entry *) ind;
2906
2907 if (eind->dyn_relocs != NULL)
2908 {
2909 if (edir->dyn_relocs != NULL)
2910 {
2911 struct ppc_elf_dyn_relocs **pp;
2912 struct ppc_elf_dyn_relocs *p;
2913
2914 /* Add reloc counts against the indirect sym to the direct sym
2915 list. Merge any entries against the same section. */
2916 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2917 {
2918 struct ppc_elf_dyn_relocs *q;
2919
2920 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2921 if (q->sec == p->sec)
2922 {
2923 q->pc_count += p->pc_count;
2924 q->count += p->count;
2925 *pp = p->next;
2926 break;
2927 }
2928 if (q == NULL)
2929 pp = &p->next;
2930 }
2931 *pp = edir->dyn_relocs;
2932 }
2933
2934 edir->dyn_relocs = eind->dyn_relocs;
2935 eind->dyn_relocs = NULL;
2936 }
2937
2938 edir->tls_mask |= eind->tls_mask;
2939 edir->has_sda_refs |= eind->has_sda_refs;
2940
2941 /* If called to transfer flags for a weakdef during processing
2942 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2943 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2944 if (!(ELIMINATE_COPY_RELOCS
2945 && eind->elf.root.type != bfd_link_hash_indirect
2946 && edir->elf.dynamic_adjusted))
2947 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2948
2949 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2950 edir->elf.ref_regular |= eind->elf.ref_regular;
2951 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2952 edir->elf.needs_plt |= eind->elf.needs_plt;
2953 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2954
2955 /* If we were called to copy over info for a weak sym, that's all. */
2956 if (eind->elf.root.type != bfd_link_hash_indirect)
2957 return;
2958
2959 /* Copy over the GOT refcount entries that we may have already seen to
2960 the symbol which just became indirect. */
2961 edir->elf.got.refcount += eind->elf.got.refcount;
2962 eind->elf.got.refcount = 0;
2963
2964 /* And plt entries. */
2965 if (eind->elf.plt.plist != NULL)
2966 {
2967 if (edir->elf.plt.plist != NULL)
2968 {
2969 struct plt_entry **entp;
2970 struct plt_entry *ent;
2971
2972 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2973 {
2974 struct plt_entry *dent;
2975
2976 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2977 if (dent->sec == ent->sec && dent->addend == ent->addend)
2978 {
2979 dent->plt.refcount += ent->plt.refcount;
2980 *entp = ent->next;
2981 break;
2982 }
2983 if (dent == NULL)
2984 entp = &ent->next;
2985 }
2986 *entp = edir->elf.plt.plist;
2987 }
2988
2989 edir->elf.plt.plist = eind->elf.plt.plist;
2990 eind->elf.plt.plist = NULL;
2991 }
2992
2993 if (eind->elf.dynindx != -1)
2994 {
2995 if (edir->elf.dynindx != -1)
2996 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2997 edir->elf.dynstr_index);
2998 edir->elf.dynindx = eind->elf.dynindx;
2999 edir->elf.dynstr_index = eind->elf.dynstr_index;
3000 eind->elf.dynindx = -1;
3001 eind->elf.dynstr_index = 0;
3002 }
3003 }
3004
3005 /* Hook called by the linker routine which adds symbols from an object
3006 file. We use it to put .comm items in .sbss, and not .bss. */
3007
3008 static bfd_boolean
3009 ppc_elf_add_symbol_hook (bfd *abfd,
3010 struct bfd_link_info *info,
3011 Elf_Internal_Sym *sym,
3012 const char **namep ATTRIBUTE_UNUSED,
3013 flagword *flagsp ATTRIBUTE_UNUSED,
3014 asection **secp,
3015 bfd_vma *valp)
3016 {
3017 if (sym->st_shndx == SHN_COMMON
3018 && !info->relocatable
3019 && is_ppc_elf (info->output_bfd)
3020 && sym->st_size <= elf_gp_size (abfd))
3021 {
3022 /* Common symbols less than or equal to -G nn bytes are automatically
3023 put into .sbss. */
3024 struct ppc_elf_link_hash_table *htab;
3025
3026 htab = ppc_elf_hash_table (info);
3027 if (htab->sbss == NULL)
3028 {
3029 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3030
3031 if (!htab->elf.dynobj)
3032 htab->elf.dynobj = abfd;
3033
3034 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3035 ".sbss",
3036 flags);
3037 if (htab->sbss == NULL)
3038 return FALSE;
3039 }
3040
3041 *secp = htab->sbss;
3042 *valp = sym->st_size;
3043 }
3044
3045 return TRUE;
3046 }
3047 \f
3048 static bfd_boolean
3049 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
3050 elf_linker_section_t *lsect)
3051 {
3052 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3053 TRUE, FALSE, TRUE);
3054 if (lsect->sym == NULL)
3055 return FALSE;
3056 if (lsect->sym->root.type == bfd_link_hash_new)
3057 lsect->sym->non_elf = 0;
3058 lsect->sym->ref_regular = 1;
3059 return TRUE;
3060 }
3061
3062 /* Create a special linker section. */
3063
3064 static bfd_boolean
3065 ppc_elf_create_linker_section (bfd *abfd,
3066 struct bfd_link_info *info,
3067 flagword flags,
3068 elf_linker_section_t *lsect)
3069 {
3070 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3071 asection *s;
3072
3073 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3074 | SEC_LINKER_CREATED);
3075
3076 /* Record the first bfd that needs the special sections. */
3077 if (!htab->elf.dynobj)
3078 htab->elf.dynobj = abfd;
3079
3080 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3081 lsect->name,
3082 flags);
3083 if (s == NULL
3084 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3085 return FALSE;
3086 lsect->section = s;
3087
3088 return create_sdata_sym (htab, lsect);
3089 }
3090
3091 /* Find a linker generated pointer with a given addend and type. */
3092
3093 static elf_linker_section_pointers_t *
3094 elf_find_pointer_linker_section
3095 (elf_linker_section_pointers_t *linker_pointers,
3096 bfd_vma addend,
3097 elf_linker_section_t *lsect)
3098 {
3099 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3100 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3101 return linker_pointers;
3102
3103 return NULL;
3104 }
3105
3106 /* Allocate a pointer to live in a linker created section. */
3107
3108 static bfd_boolean
3109 elf_create_pointer_linker_section (bfd *abfd,
3110 elf_linker_section_t *lsect,
3111 struct elf_link_hash_entry *h,
3112 const Elf_Internal_Rela *rel)
3113 {
3114 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3115 elf_linker_section_pointers_t *linker_section_ptr;
3116 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3117 bfd_size_type amt;
3118
3119 BFD_ASSERT (lsect != NULL);
3120
3121 /* Is this a global symbol? */
3122 if (h != NULL)
3123 {
3124 struct ppc_elf_link_hash_entry *eh;
3125
3126 /* Has this symbol already been allocated? If so, our work is done. */
3127 eh = (struct ppc_elf_link_hash_entry *) h;
3128 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3129 rel->r_addend,
3130 lsect))
3131 return TRUE;
3132
3133 ptr_linker_section_ptr = &eh->linker_section_pointer;
3134 }
3135 else
3136 {
3137 BFD_ASSERT (is_ppc_elf (abfd));
3138
3139 /* Allocation of a pointer to a local symbol. */
3140 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3141
3142 /* Allocate a table to hold the local symbols if first time. */
3143 if (!ptr)
3144 {
3145 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3146
3147 amt = num_symbols;
3148 amt *= sizeof (elf_linker_section_pointers_t *);
3149 ptr = bfd_zalloc (abfd, amt);
3150
3151 if (!ptr)
3152 return FALSE;
3153
3154 elf_local_ptr_offsets (abfd) = ptr;
3155 }
3156
3157 /* Has this symbol already been allocated? If so, our work is done. */
3158 if (elf_find_pointer_linker_section (ptr[r_symndx],
3159 rel->r_addend,
3160 lsect))
3161 return TRUE;
3162
3163 ptr_linker_section_ptr = &ptr[r_symndx];
3164 }
3165
3166 /* Allocate space for a pointer in the linker section, and allocate
3167 a new pointer record from internal memory. */
3168 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3169 amt = sizeof (elf_linker_section_pointers_t);
3170 linker_section_ptr = bfd_alloc (abfd, amt);
3171
3172 if (!linker_section_ptr)
3173 return FALSE;
3174
3175 linker_section_ptr->next = *ptr_linker_section_ptr;
3176 linker_section_ptr->addend = rel->r_addend;
3177 linker_section_ptr->lsect = lsect;
3178 *ptr_linker_section_ptr = linker_section_ptr;
3179
3180 linker_section_ptr->offset = lsect->section->size;
3181 lsect->section->size += 4;
3182
3183 #ifdef DEBUG
3184 fprintf (stderr,
3185 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3186 lsect->name, (long) linker_section_ptr->offset,
3187 (long) lsect->section->size);
3188 #endif
3189
3190 return TRUE;
3191 }
3192
3193 static bfd_boolean
3194 update_local_sym_info (bfd *abfd,
3195 Elf_Internal_Shdr *symtab_hdr,
3196 unsigned long r_symndx,
3197 int tls_type)
3198 {
3199 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3200 char *local_got_tls_masks;
3201
3202 if (local_got_refcounts == NULL)
3203 {
3204 bfd_size_type size = symtab_hdr->sh_info;
3205
3206 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3207 local_got_refcounts = bfd_zalloc (abfd, size);
3208 if (local_got_refcounts == NULL)
3209 return FALSE;
3210 elf_local_got_refcounts (abfd) = local_got_refcounts;
3211 }
3212
3213 local_got_refcounts[r_symndx] += 1;
3214 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3215 local_got_tls_masks[r_symndx] |= tls_type;
3216 return TRUE;
3217 }
3218
3219 static bfd_boolean
3220 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
3221 asection *sec, bfd_vma addend)
3222 {
3223 struct plt_entry *ent;
3224
3225 if (addend < 32768)
3226 sec = NULL;
3227 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3228 if (ent->sec == sec && ent->addend == addend)
3229 break;
3230 if (ent == NULL)
3231 {
3232 bfd_size_type amt = sizeof (*ent);
3233 ent = bfd_alloc (abfd, amt);
3234 if (ent == NULL)
3235 return FALSE;
3236 ent->next = h->plt.plist;
3237 ent->sec = sec;
3238 ent->addend = addend;
3239 ent->plt.refcount = 0;
3240 h->plt.plist = ent;
3241 }
3242 ent->plt.refcount += 1;
3243 return TRUE;
3244 }
3245
3246 static struct plt_entry *
3247 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3248 {
3249 struct plt_entry *ent;
3250
3251 if (addend < 32768)
3252 sec = NULL;
3253 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3254 if (ent->sec == sec && ent->addend == addend)
3255 break;
3256 return ent;
3257 }
3258
3259 static void
3260 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3261 {
3262 (*_bfd_error_handler)
3263 (_("%B: relocation %s cannot be used when making a shared object"),
3264 abfd,
3265 ppc_elf_howto_table[r_type]->name);
3266 bfd_set_error (bfd_error_bad_value);
3267 }
3268
3269 /* Look through the relocs for a section during the first phase, and
3270 allocate space in the global offset table or procedure linkage
3271 table. */
3272
3273 static bfd_boolean
3274 ppc_elf_check_relocs (bfd *abfd,
3275 struct bfd_link_info *info,
3276 asection *sec,
3277 const Elf_Internal_Rela *relocs)
3278 {
3279 struct ppc_elf_link_hash_table *htab;
3280 Elf_Internal_Shdr *symtab_hdr;
3281 struct elf_link_hash_entry **sym_hashes;
3282 const Elf_Internal_Rela *rel;
3283 const Elf_Internal_Rela *rel_end;
3284 asection *got2, *sreloc;
3285
3286 if (info->relocatable)
3287 return TRUE;
3288
3289 /* Don't do anything special with non-loaded, non-alloced sections.
3290 In particular, any relocs in such sections should not affect GOT
3291 and PLT reference counting (ie. we don't allow them to create GOT
3292 or PLT entries), there's no possibility or desire to optimize TLS
3293 relocs, and there's not much point in propagating relocs to shared
3294 libs that the dynamic linker won't relocate. */
3295 if ((sec->flags & SEC_ALLOC) == 0)
3296 return TRUE;
3297
3298 #ifdef DEBUG
3299 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3300 sec, abfd);
3301 #endif
3302
3303 BFD_ASSERT (is_ppc_elf (abfd));
3304
3305 /* Initialize howto table if not already done. */
3306 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3307 ppc_elf_howto_init ();
3308
3309 htab = ppc_elf_hash_table (info);
3310 symtab_hdr = &elf_symtab_hdr (abfd);
3311 sym_hashes = elf_sym_hashes (abfd);
3312 got2 = bfd_get_section_by_name (abfd, ".got2");
3313 sreloc = NULL;
3314
3315 rel_end = relocs + sec->reloc_count;
3316 for (rel = relocs; rel < rel_end; rel++)
3317 {
3318 unsigned long r_symndx;
3319 enum elf_ppc_reloc_type r_type;
3320 struct elf_link_hash_entry *h;
3321 int tls_type = 0;
3322
3323 r_symndx = ELF32_R_SYM (rel->r_info);
3324 if (r_symndx < symtab_hdr->sh_info)
3325 h = NULL;
3326 else
3327 {
3328 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3329 while (h->root.type == bfd_link_hash_indirect
3330 || h->root.type == bfd_link_hash_warning)
3331 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3332 }
3333
3334 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3335 This shows up in particular in an R_PPC_ADDR32 in the eabi
3336 startup code. */
3337 if (h != NULL
3338 && htab->got == NULL
3339 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3340 {
3341 if (htab->elf.dynobj == NULL)
3342 htab->elf.dynobj = abfd;
3343 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3344 return FALSE;
3345 BFD_ASSERT (h == htab->elf.hgot);
3346 }
3347
3348 r_type = ELF32_R_TYPE (rel->r_info);
3349 switch (r_type)
3350 {
3351 case R_PPC_GOT_TLSLD16:
3352 case R_PPC_GOT_TLSLD16_LO:
3353 case R_PPC_GOT_TLSLD16_HI:
3354 case R_PPC_GOT_TLSLD16_HA:
3355 tls_type = TLS_TLS | TLS_LD;
3356 goto dogottls;
3357
3358 case R_PPC_GOT_TLSGD16:
3359 case R_PPC_GOT_TLSGD16_LO:
3360 case R_PPC_GOT_TLSGD16_HI:
3361 case R_PPC_GOT_TLSGD16_HA:
3362 tls_type = TLS_TLS | TLS_GD;
3363 goto dogottls;
3364
3365 case R_PPC_GOT_TPREL16:
3366 case R_PPC_GOT_TPREL16_LO:
3367 case R_PPC_GOT_TPREL16_HI:
3368 case R_PPC_GOT_TPREL16_HA:
3369 if (!info->executable)
3370 info->flags |= DF_STATIC_TLS;
3371 tls_type = TLS_TLS | TLS_TPREL;
3372 goto dogottls;
3373
3374 case R_PPC_GOT_DTPREL16:
3375 case R_PPC_GOT_DTPREL16_LO:
3376 case R_PPC_GOT_DTPREL16_HI:
3377 case R_PPC_GOT_DTPREL16_HA:
3378 tls_type = TLS_TLS | TLS_DTPREL;
3379 dogottls:
3380 sec->has_tls_reloc = 1;
3381 /* Fall thru */
3382
3383 /* GOT16 relocations */
3384 case R_PPC_GOT16:
3385 case R_PPC_GOT16_LO:
3386 case R_PPC_GOT16_HI:
3387 case R_PPC_GOT16_HA:
3388 /* This symbol requires a global offset table entry. */
3389 if (htab->got == NULL)
3390 {
3391 if (htab->elf.dynobj == NULL)
3392 htab->elf.dynobj = abfd;
3393 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3394 return FALSE;
3395 }
3396 if (h != NULL)
3397 {
3398 h->got.refcount += 1;
3399 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3400 }
3401 else
3402 /* This is a global offset table entry for a local symbol. */
3403 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3404 return FALSE;
3405 break;
3406
3407 /* Indirect .sdata relocation. */
3408 case R_PPC_EMB_SDAI16:
3409 if (info->shared)
3410 {
3411 bad_shared_reloc (abfd, r_type);
3412 return FALSE;
3413 }
3414 if (htab->sdata[0].section == NULL
3415 && !ppc_elf_create_linker_section (abfd, info, 0,
3416 &htab->sdata[0]))
3417 return FALSE;
3418 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3419 h, rel))
3420 return FALSE;
3421 if (h != NULL)
3422 {
3423 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3424 h->non_got_ref = TRUE;
3425 }
3426 break;
3427
3428 /* Indirect .sdata2 relocation. */
3429 case R_PPC_EMB_SDA2I16:
3430 if (info->shared)
3431 {
3432 bad_shared_reloc (abfd, r_type);
3433 return FALSE;
3434 }
3435 if (htab->sdata[1].section == NULL
3436 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3437 &htab->sdata[1]))
3438 return FALSE;
3439 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3440 h, rel))
3441 return FALSE;
3442 if (h != NULL)
3443 {
3444 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3445 h->non_got_ref = TRUE;
3446 }
3447 break;
3448
3449 case R_PPC_SDAREL16:
3450 if (info->shared)
3451 {
3452 bad_shared_reloc (abfd, r_type);
3453 return FALSE;
3454 }
3455 if (htab->sdata[0].sym == NULL
3456 && !create_sdata_sym (htab, &htab->sdata[0]))
3457 return FALSE;
3458 if (h != NULL)
3459 {
3460 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3461 h->non_got_ref = TRUE;
3462 }
3463 break;
3464
3465 case R_PPC_EMB_SDA2REL:
3466 if (info->shared)
3467 {
3468 bad_shared_reloc (abfd, r_type);
3469 return FALSE;
3470 }
3471 if (htab->sdata[1].sym == NULL
3472 && !create_sdata_sym (htab, &htab->sdata[1]))
3473 return FALSE;
3474 if (h != NULL)
3475 {
3476 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3477 h->non_got_ref = TRUE;
3478 }
3479 break;
3480
3481 case R_PPC_EMB_SDA21:
3482 case R_PPC_EMB_RELSDA:
3483 if (info->shared)
3484 {
3485 bad_shared_reloc (abfd, r_type);
3486 return FALSE;
3487 }
3488 if (htab->sdata[0].sym == NULL
3489 && !create_sdata_sym (htab, &htab->sdata[0]))
3490 return FALSE;
3491 if (htab->sdata[1].sym == NULL
3492 && !create_sdata_sym (htab, &htab->sdata[1]))
3493 return FALSE;
3494 if (h != NULL)
3495 {
3496 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3497 h->non_got_ref = TRUE;
3498 }
3499 break;
3500
3501 case R_PPC_EMB_NADDR32:
3502 case R_PPC_EMB_NADDR16:
3503 case R_PPC_EMB_NADDR16_LO:
3504 case R_PPC_EMB_NADDR16_HI:
3505 case R_PPC_EMB_NADDR16_HA:
3506 if (info->shared)
3507 {
3508 bad_shared_reloc (abfd, r_type);
3509 return FALSE;
3510 }
3511 if (h != NULL)
3512 h->non_got_ref = TRUE;
3513 break;
3514
3515 case R_PPC_PLT32:
3516 case R_PPC_PLTREL24:
3517 case R_PPC_PLTREL32:
3518 case R_PPC_PLT16_LO:
3519 case R_PPC_PLT16_HI:
3520 case R_PPC_PLT16_HA:
3521 #ifdef DEBUG
3522 fprintf (stderr, "Reloc requires a PLT entry\n");
3523 #endif
3524 /* This symbol requires a procedure linkage table entry. We
3525 actually build the entry in finish_dynamic_symbol,
3526 because this might be a case of linking PIC code without
3527 linking in any dynamic objects, in which case we don't
3528 need to generate a procedure linkage table after all. */
3529
3530 if (h == NULL)
3531 {
3532 /* It does not make sense to have a procedure linkage
3533 table entry for a local symbol. */
3534 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3535 "local symbol"),
3536 abfd,
3537 sec,
3538 (long) rel->r_offset,
3539 ppc_elf_howto_table[r_type]->name);
3540 bfd_set_error (bfd_error_bad_value);
3541 return FALSE;
3542 }
3543 else
3544 {
3545 bfd_vma addend = 0;
3546
3547 if (r_type == R_PPC_PLTREL24)
3548 {
3549 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3550 addend = rel->r_addend;
3551 }
3552 h->needs_plt = 1;
3553 if (!update_plt_info (abfd, h, got2, addend))
3554 return FALSE;
3555 }
3556 break;
3557
3558 /* The following relocations don't need to propagate the
3559 relocation if linking a shared object since they are
3560 section relative. */
3561 case R_PPC_SECTOFF:
3562 case R_PPC_SECTOFF_LO:
3563 case R_PPC_SECTOFF_HI:
3564 case R_PPC_SECTOFF_HA:
3565 case R_PPC_DTPREL16:
3566 case R_PPC_DTPREL16_LO:
3567 case R_PPC_DTPREL16_HI:
3568 case R_PPC_DTPREL16_HA:
3569 case R_PPC_TOC16:
3570 break;
3571
3572 case R_PPC_REL16:
3573 case R_PPC_REL16_LO:
3574 case R_PPC_REL16_HI:
3575 case R_PPC_REL16_HA:
3576 ppc_elf_tdata (abfd)->has_rel16 = 1;
3577 break;
3578
3579 /* These are just markers. */
3580 case R_PPC_TLS:
3581 case R_PPC_EMB_MRKREF:
3582 case R_PPC_NONE:
3583 case R_PPC_max:
3584 break;
3585
3586 /* These should only appear in dynamic objects. */
3587 case R_PPC_COPY:
3588 case R_PPC_GLOB_DAT:
3589 case R_PPC_JMP_SLOT:
3590 case R_PPC_RELATIVE:
3591 break;
3592
3593 /* These aren't handled yet. We'll report an error later. */
3594 case R_PPC_ADDR30:
3595 case R_PPC_EMB_RELSEC16:
3596 case R_PPC_EMB_RELST_LO:
3597 case R_PPC_EMB_RELST_HI:
3598 case R_PPC_EMB_RELST_HA:
3599 case R_PPC_EMB_BIT_FLD:
3600 break;
3601
3602 /* This refers only to functions defined in the shared library. */
3603 case R_PPC_LOCAL24PC:
3604 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3605 {
3606 htab->plt_type = PLT_OLD;
3607 htab->old_bfd = abfd;
3608 }
3609 break;
3610
3611 /* This relocation describes the C++ object vtable hierarchy.
3612 Reconstruct it for later use during GC. */
3613 case R_PPC_GNU_VTINHERIT:
3614 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3615 return FALSE;
3616 break;
3617
3618 /* This relocation describes which C++ vtable entries are actually
3619 used. Record for later use during GC. */
3620 case R_PPC_GNU_VTENTRY:
3621 BFD_ASSERT (h != NULL);
3622 if (h != NULL
3623 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3624 return FALSE;
3625 break;
3626
3627 /* We shouldn't really be seeing these. */
3628 case R_PPC_TPREL32:
3629 case R_PPC_TPREL16:
3630 case R_PPC_TPREL16_LO:
3631 case R_PPC_TPREL16_HI:
3632 case R_PPC_TPREL16_HA:
3633 if (!info->executable)
3634 info->flags |= DF_STATIC_TLS;
3635 goto dodyn;
3636
3637 /* Nor these. */
3638 case R_PPC_DTPMOD32:
3639 case R_PPC_DTPREL32:
3640 goto dodyn;
3641
3642 case R_PPC_REL32:
3643 if (h == NULL
3644 && got2 != NULL
3645 && (sec->flags & SEC_CODE) != 0
3646 && (info->shared || info->pie)
3647 && htab->plt_type == PLT_UNSET)
3648 {
3649 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3650 the start of a function, which assembles to a REL32
3651 reference to .got2. If we detect one of these, then
3652 force the old PLT layout because the linker cannot
3653 reliably deduce the GOT pointer value needed for
3654 PLT call stubs. */
3655 asection *s;
3656
3657 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3658 r_symndx);
3659 if (s == got2)
3660 {
3661 htab->plt_type = PLT_OLD;
3662 htab->old_bfd = abfd;
3663 }
3664 }
3665 if (h == NULL || h == htab->elf.hgot)
3666 break;
3667 /* fall through */
3668
3669 case R_PPC_ADDR32:
3670 case R_PPC_ADDR16:
3671 case R_PPC_ADDR16_LO:
3672 case R_PPC_ADDR16_HI:
3673 case R_PPC_ADDR16_HA:
3674 case R_PPC_UADDR32:
3675 case R_PPC_UADDR16:
3676 if (h != NULL && !info->shared)
3677 {
3678 /* We may need a plt entry if the symbol turns out to be
3679 a function defined in a dynamic object. */
3680 if (!update_plt_info (abfd, h, NULL, 0))
3681 return FALSE;
3682
3683 /* We may need a copy reloc too. */
3684 h->non_got_ref = 1;
3685 h->pointer_equality_needed = 1;
3686 }
3687 goto dodyn;
3688
3689 case R_PPC_REL24:
3690 case R_PPC_REL14:
3691 case R_PPC_REL14_BRTAKEN:
3692 case R_PPC_REL14_BRNTAKEN:
3693 if (h == NULL)
3694 break;
3695 if (h == htab->elf.hgot)
3696 {
3697 if (htab->plt_type == PLT_UNSET)
3698 {
3699 htab->plt_type = PLT_OLD;
3700 htab->old_bfd = abfd;
3701 }
3702 break;
3703 }
3704 /* fall through */
3705
3706 case R_PPC_ADDR24:
3707 case R_PPC_ADDR14:
3708 case R_PPC_ADDR14_BRTAKEN:
3709 case R_PPC_ADDR14_BRNTAKEN:
3710 if (h != NULL && !info->shared)
3711 {
3712 /* We may need a plt entry if the symbol turns out to be
3713 a function defined in a dynamic object. */
3714 if (!update_plt_info (abfd, h, NULL, 0))
3715 return FALSE;
3716 break;
3717 }
3718
3719 dodyn:
3720 /* If we are creating a shared library, and this is a reloc
3721 against a global symbol, or a non PC relative reloc
3722 against a local symbol, then we need to copy the reloc
3723 into the shared library. However, if we are linking with
3724 -Bsymbolic, we do not need to copy a reloc against a
3725 global symbol which is defined in an object we are
3726 including in the link (i.e., DEF_REGULAR is set). At
3727 this point we have not seen all the input files, so it is
3728 possible that DEF_REGULAR is not set now but will be set
3729 later (it is never cleared). In case of a weak definition,
3730 DEF_REGULAR may be cleared later by a strong definition in
3731 a shared library. We account for that possibility below by
3732 storing information in the dyn_relocs field of the hash
3733 table entry. A similar situation occurs when creating
3734 shared libraries and symbol visibility changes render the
3735 symbol local.
3736
3737 If on the other hand, we are creating an executable, we
3738 may need to keep relocations for symbols satisfied by a
3739 dynamic library if we manage to avoid copy relocs for the
3740 symbol. */
3741 if ((info->shared
3742 && (must_be_dyn_reloc (info, r_type)
3743 || (h != NULL
3744 && (! info->symbolic
3745 || h->root.type == bfd_link_hash_defweak
3746 || !h->def_regular))))
3747 || (ELIMINATE_COPY_RELOCS
3748 && !info->shared
3749 && h != NULL
3750 && (h->root.type == bfd_link_hash_defweak
3751 || !h->def_regular)))
3752 {
3753 struct ppc_elf_dyn_relocs *p;
3754 struct ppc_elf_dyn_relocs **head;
3755
3756 #ifdef DEBUG
3757 fprintf (stderr,
3758 "ppc_elf_check_relocs needs to "
3759 "create relocation for %s\n",
3760 (h && h->root.root.string
3761 ? h->root.root.string : "<unknown>"));
3762 #endif
3763 if (sreloc == NULL)
3764 {
3765 const char *name;
3766
3767 name = (bfd_elf_string_from_elf_section
3768 (abfd,
3769 elf_elfheader (abfd)->e_shstrndx,
3770 elf_section_data (sec)->rel_hdr.sh_name));
3771 if (name == NULL)
3772 return FALSE;
3773
3774 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3775 && strcmp (bfd_get_section_name (abfd, sec),
3776 name + 5) == 0);
3777
3778 if (htab->elf.dynobj == NULL)
3779 htab->elf.dynobj = abfd;
3780 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3781 if (sreloc == NULL)
3782 {
3783 flagword flags;
3784
3785 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3786 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3787 | SEC_ALLOC | SEC_LOAD);
3788 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3789 name,
3790 flags);
3791 if (sreloc == NULL
3792 || ! bfd_set_section_alignment (htab->elf.dynobj,
3793 sreloc, 2))
3794 return FALSE;
3795 }
3796 elf_section_data (sec)->sreloc = sreloc;
3797 }
3798
3799 /* If this is a global symbol, we count the number of
3800 relocations we need for this symbol. */
3801 if (h != NULL)
3802 {
3803 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3804 }
3805 else
3806 {
3807 /* Track dynamic relocs needed for local syms too.
3808 We really need local syms available to do this
3809 easily. Oh well. */
3810
3811 asection *s;
3812 void *vpp;
3813
3814 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3815 sec, r_symndx);
3816 if (s == NULL)
3817 return FALSE;
3818
3819 vpp = &elf_section_data (s)->local_dynrel;
3820 head = (struct ppc_elf_dyn_relocs **) vpp;
3821 }
3822
3823 p = *head;
3824 if (p == NULL || p->sec != sec)
3825 {
3826 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3827 if (p == NULL)
3828 return FALSE;
3829 p->next = *head;
3830 *head = p;
3831 p->sec = sec;
3832 p->count = 0;
3833 p->pc_count = 0;
3834 }
3835
3836 p->count += 1;
3837 if (!must_be_dyn_reloc (info, r_type))
3838 p->pc_count += 1;
3839 }
3840
3841 break;
3842 }
3843 }
3844
3845 return TRUE;
3846 }
3847 \f
3848
3849 /* Merge object attributes from IBFD into OBFD. Raise an error if
3850 there are conflicting attributes. */
3851 static bfd_boolean
3852 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3853 {
3854 obj_attribute *in_attr, *in_attrs;
3855 obj_attribute *out_attr, *out_attrs;
3856
3857 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3858 {
3859 /* This is the first object. Copy the attributes. */
3860 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3861
3862 /* Use the Tag_null value to indicate the attributes have been
3863 initialized. */
3864 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3865
3866 return TRUE;
3867 }
3868
3869 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3870 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3871
3872 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3873 non-conflicting ones. */
3874 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3875 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3876 if (in_attr->i != out_attr->i)
3877 {
3878 out_attr->type = 1;
3879 if (out_attr->i == 0)
3880 out_attr->i = in_attr->i;
3881 else if (in_attr->i == 0)
3882 ;
3883 else if (out_attr->i == 1 && in_attr->i == 2)
3884 _bfd_error_handler
3885 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3886 else if (out_attr->i == 1 && in_attr->i == 3)
3887 _bfd_error_handler
3888 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3889 obfd, ibfd);
3890 else if (out_attr->i == 3 && in_attr->i == 1)
3891 _bfd_error_handler
3892 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3893 ibfd, obfd);
3894 else if (out_attr->i == 3 && in_attr->i == 2)
3895 _bfd_error_handler
3896 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
3897 ibfd, obfd);
3898 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
3899 _bfd_error_handler
3900 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3901 else if (in_attr->i > 3)
3902 _bfd_error_handler
3903 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3904 in_attr->i);
3905 else
3906 _bfd_error_handler
3907 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3908 out_attr->i);
3909 }
3910
3911 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3912 merge non-conflicting ones. */
3913 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3914 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3915 if (in_attr->i != out_attr->i)
3916 {
3917 const char *in_abi = NULL, *out_abi = NULL;
3918
3919 switch (in_attr->i)
3920 {
3921 case 1: in_abi = "generic"; break;
3922 case 2: in_abi = "AltiVec"; break;
3923 case 3: in_abi = "SPE"; break;
3924 }
3925
3926 switch (out_attr->i)
3927 {
3928 case 1: out_abi = "generic"; break;
3929 case 2: out_abi = "AltiVec"; break;
3930 case 3: out_abi = "SPE"; break;
3931 }
3932
3933 out_attr->type = 1;
3934 if (out_attr->i == 0)
3935 out_attr->i = in_attr->i;
3936 else if (in_attr->i == 0)
3937 ;
3938 /* For now, allow generic to transition to AltiVec or SPE
3939 without a warning. If GCC marked files with their stack
3940 alignment and used don't-care markings for files which are
3941 not affected by the vector ABI, we could warn about this
3942 case too. */
3943 else if (out_attr->i == 1)
3944 out_attr->i = in_attr->i;
3945 else if (in_attr->i == 1)
3946 ;
3947 else if (in_abi == NULL)
3948 _bfd_error_handler
3949 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3950 in_attr->i);
3951 else if (out_abi == NULL)
3952 _bfd_error_handler
3953 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3954 in_attr->i);
3955 else
3956 _bfd_error_handler
3957 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3958 ibfd, obfd, in_abi, out_abi);
3959 }
3960
3961 /* Merge Tag_compatibility attributes and any common GNU ones. */
3962 _bfd_elf_merge_object_attributes (ibfd, obfd);
3963
3964 return TRUE;
3965 }
3966
3967 /* Merge backend specific data from an object file to the output
3968 object file when linking. */
3969
3970 static bfd_boolean
3971 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3972 {
3973 flagword old_flags;
3974 flagword new_flags;
3975 bfd_boolean error;
3976
3977 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3978 return TRUE;
3979
3980 /* Check if we have the same endianess. */
3981 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3982 return FALSE;
3983
3984 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3985 return FALSE;
3986
3987 new_flags = elf_elfheader (ibfd)->e_flags;
3988 old_flags = elf_elfheader (obfd)->e_flags;
3989 if (!elf_flags_init (obfd))
3990 {
3991 /* First call, no flags set. */
3992 elf_flags_init (obfd) = TRUE;
3993 elf_elfheader (obfd)->e_flags = new_flags;
3994 }
3995
3996 /* Compatible flags are ok. */
3997 else if (new_flags == old_flags)
3998 ;
3999
4000 /* Incompatible flags. */
4001 else
4002 {
4003 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4004 to be linked with either. */
4005 error = FALSE;
4006 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4007 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4008 {
4009 error = TRUE;
4010 (*_bfd_error_handler)
4011 (_("%B: compiled with -mrelocatable and linked with "
4012 "modules compiled normally"), ibfd);
4013 }
4014 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4015 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4016 {
4017 error = TRUE;
4018 (*_bfd_error_handler)
4019 (_("%B: compiled normally and linked with "
4020 "modules compiled with -mrelocatable"), ibfd);
4021 }
4022
4023 /* The output is -mrelocatable-lib iff both the input files are. */
4024 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4025 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4026
4027 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4028 but each input file is either -mrelocatable or -mrelocatable-lib. */
4029 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4030 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4031 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4032 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4033
4034 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4035 any module uses it. */
4036 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4037
4038 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4039 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4040
4041 /* Warn about any other mismatches. */
4042 if (new_flags != old_flags)
4043 {
4044 error = TRUE;
4045 (*_bfd_error_handler)
4046 (_("%B: uses different e_flags (0x%lx) fields "
4047 "than previous modules (0x%lx)"),
4048 ibfd, (long) new_flags, (long) old_flags);
4049 }
4050
4051 if (error)
4052 {
4053 bfd_set_error (bfd_error_bad_value);
4054 return FALSE;
4055 }
4056 }
4057
4058 return TRUE;
4059 }
4060 \f
4061 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4062 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4063 int
4064 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4065 struct bfd_link_info *info,
4066 enum ppc_elf_plt_type plt_style,
4067 int emit_stub_syms)
4068 {
4069 struct ppc_elf_link_hash_table *htab;
4070 flagword flags;
4071
4072 htab = ppc_elf_hash_table (info);
4073
4074 if (htab->plt_type == PLT_UNSET)
4075 {
4076 if (plt_style == PLT_OLD)
4077 htab->plt_type = PLT_OLD;
4078 else
4079 {
4080 bfd *ibfd;
4081 enum ppc_elf_plt_type plt_type = plt_style;
4082
4083 /* Look through the reloc flags left by ppc_elf_check_relocs.
4084 Use the old style bss plt if a file makes plt calls
4085 without using the new relocs, and if ld isn't given
4086 --secure-plt and we never see REL16 relocs. */
4087 if (plt_type == PLT_UNSET)
4088 plt_type = PLT_OLD;
4089 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4090 if (is_ppc_elf (ibfd))
4091 {
4092 if (ppc_elf_tdata (ibfd)->has_rel16)
4093 plt_type = PLT_NEW;
4094 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4095 {
4096 plt_type = PLT_OLD;
4097 htab->old_bfd = ibfd;
4098 break;
4099 }
4100 }
4101 htab->plt_type = plt_type;
4102 }
4103 }
4104 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4105 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4106
4107 htab->emit_stub_syms = emit_stub_syms;
4108
4109 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4110
4111 if (htab->plt_type == PLT_NEW)
4112 {
4113 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4114 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4115
4116 /* The new PLT is a loaded section. */
4117 if (htab->plt != NULL
4118 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4119 return -1;
4120
4121 /* The new GOT is not executable. */
4122 if (htab->got != NULL
4123 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4124 return -1;
4125 }
4126 else
4127 {
4128 /* Stop an unused .glink section from affecting .text alignment. */
4129 if (htab->glink != NULL
4130 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4131 return -1;
4132 }
4133 return htab->plt_type == PLT_NEW;
4134 }
4135 \f
4136 /* Return the section that should be marked against GC for a given
4137 relocation. */
4138
4139 static asection *
4140 ppc_elf_gc_mark_hook (asection *sec,
4141 struct bfd_link_info *info,
4142 Elf_Internal_Rela *rel,
4143 struct elf_link_hash_entry *h,
4144 Elf_Internal_Sym *sym)
4145 {
4146 if (h != NULL)
4147 switch (ELF32_R_TYPE (rel->r_info))
4148 {
4149 case R_PPC_GNU_VTINHERIT:
4150 case R_PPC_GNU_VTENTRY:
4151 return NULL;
4152 }
4153
4154 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4155 }
4156
4157 /* Update the got, plt and dynamic reloc reference counts for the
4158 section being removed. */
4159
4160 static bfd_boolean
4161 ppc_elf_gc_sweep_hook (bfd *abfd,
4162 struct bfd_link_info *info,
4163 asection *sec,
4164 const Elf_Internal_Rela *relocs)
4165 {
4166 struct ppc_elf_link_hash_table *htab;
4167 Elf_Internal_Shdr *symtab_hdr;
4168 struct elf_link_hash_entry **sym_hashes;
4169 bfd_signed_vma *local_got_refcounts;
4170 const Elf_Internal_Rela *rel, *relend;
4171 asection *got2;
4172
4173 if (info->relocatable)
4174 return TRUE;
4175
4176 if ((sec->flags & SEC_ALLOC) == 0)
4177 return TRUE;
4178
4179 elf_section_data (sec)->local_dynrel = NULL;
4180
4181 htab = ppc_elf_hash_table (info);
4182 symtab_hdr = &elf_symtab_hdr (abfd);
4183 sym_hashes = elf_sym_hashes (abfd);
4184 local_got_refcounts = elf_local_got_refcounts (abfd);
4185 got2 = bfd_get_section_by_name (abfd, ".got2");
4186
4187 relend = relocs + sec->reloc_count;
4188 for (rel = relocs; rel < relend; rel++)
4189 {
4190 unsigned long r_symndx;
4191 enum elf_ppc_reloc_type r_type;
4192 struct elf_link_hash_entry *h = NULL;
4193
4194 r_symndx = ELF32_R_SYM (rel->r_info);
4195 if (r_symndx >= symtab_hdr->sh_info)
4196 {
4197 struct ppc_elf_dyn_relocs **pp, *p;
4198 struct ppc_elf_link_hash_entry *eh;
4199
4200 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4201 while (h->root.type == bfd_link_hash_indirect
4202 || h->root.type == bfd_link_hash_warning)
4203 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4204 eh = (struct ppc_elf_link_hash_entry *) h;
4205
4206 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4207 if (p->sec == sec)
4208 {
4209 /* Everything must go for SEC. */
4210 *pp = p->next;
4211 break;
4212 }
4213 }
4214
4215 r_type = ELF32_R_TYPE (rel->r_info);
4216 switch (r_type)
4217 {
4218 case R_PPC_GOT_TLSLD16:
4219 case R_PPC_GOT_TLSLD16_LO:
4220 case R_PPC_GOT_TLSLD16_HI:
4221 case R_PPC_GOT_TLSLD16_HA:
4222 case R_PPC_GOT_TLSGD16:
4223 case R_PPC_GOT_TLSGD16_LO:
4224 case R_PPC_GOT_TLSGD16_HI:
4225 case R_PPC_GOT_TLSGD16_HA:
4226 case R_PPC_GOT_TPREL16:
4227 case R_PPC_GOT_TPREL16_LO:
4228 case R_PPC_GOT_TPREL16_HI:
4229 case R_PPC_GOT_TPREL16_HA:
4230 case R_PPC_GOT_DTPREL16:
4231 case R_PPC_GOT_DTPREL16_LO:
4232 case R_PPC_GOT_DTPREL16_HI:
4233 case R_PPC_GOT_DTPREL16_HA:
4234 case R_PPC_GOT16:
4235 case R_PPC_GOT16_LO:
4236 case R_PPC_GOT16_HI:
4237 case R_PPC_GOT16_HA:
4238 if (h != NULL)
4239 {
4240 if (h->got.refcount > 0)
4241 h->got.refcount--;
4242 }
4243 else if (local_got_refcounts != NULL)
4244 {
4245 if (local_got_refcounts[r_symndx] > 0)
4246 local_got_refcounts[r_symndx]--;
4247 }
4248 break;
4249
4250 case R_PPC_REL24:
4251 case R_PPC_REL14:
4252 case R_PPC_REL14_BRTAKEN:
4253 case R_PPC_REL14_BRNTAKEN:
4254 case R_PPC_REL32:
4255 if (h == NULL || h == htab->elf.hgot)
4256 break;
4257 /* Fall thru */
4258
4259 case R_PPC_ADDR32:
4260 case R_PPC_ADDR24:
4261 case R_PPC_ADDR16:
4262 case R_PPC_ADDR16_LO:
4263 case R_PPC_ADDR16_HI:
4264 case R_PPC_ADDR16_HA:
4265 case R_PPC_ADDR14:
4266 case R_PPC_ADDR14_BRTAKEN:
4267 case R_PPC_ADDR14_BRNTAKEN:
4268 case R_PPC_UADDR32:
4269 case R_PPC_UADDR16:
4270 if (info->shared)
4271 break;
4272
4273 case R_PPC_PLT32:
4274 case R_PPC_PLTREL24:
4275 case R_PPC_PLTREL32:
4276 case R_PPC_PLT16_LO:
4277 case R_PPC_PLT16_HI:
4278 case R_PPC_PLT16_HA:
4279 if (h != NULL)
4280 {
4281 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4282 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4283 if (ent->plt.refcount > 0)
4284 ent->plt.refcount -= 1;
4285 }
4286 break;
4287
4288 default:
4289 break;
4290 }
4291 }
4292 return TRUE;
4293 }
4294 \f
4295 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4296
4297 asection *
4298 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4299 {
4300 struct ppc_elf_link_hash_table *htab;
4301
4302 htab = ppc_elf_hash_table (info);
4303 if (htab->plt_type == PLT_NEW
4304 && htab->plt != NULL
4305 && htab->plt->output_section != NULL)
4306 {
4307 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4308 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4309 }
4310
4311 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4312 FALSE, FALSE, TRUE);
4313 return _bfd_elf_tls_setup (obfd, info);
4314 }
4315
4316 /* Run through all the TLS relocs looking for optimization
4317 opportunities. */
4318
4319 bfd_boolean
4320 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4321 struct bfd_link_info *info)
4322 {
4323 bfd *ibfd;
4324 asection *sec;
4325 struct ppc_elf_link_hash_table *htab;
4326 int pass;
4327
4328 if (info->relocatable || !info->executable)
4329 return TRUE;
4330
4331 htab = ppc_elf_hash_table (info);
4332 /* Make two passes through the relocs. First time check that tls
4333 relocs involved in setting up a tls_get_addr call are indeed
4334 followed by such a call. If they are not, exclude them from
4335 the optimizations done on the second pass. */
4336 for (pass = 0; pass < 2; ++pass)
4337 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4338 {
4339 Elf_Internal_Sym *locsyms = NULL;
4340 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4341
4342 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4343 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4344 {
4345 Elf_Internal_Rela *relstart, *rel, *relend;
4346
4347 /* Read the relocations. */
4348 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4349 info->keep_memory);
4350 if (relstart == NULL)
4351 return FALSE;
4352
4353 relend = relstart + sec->reloc_count;
4354 for (rel = relstart; rel < relend; rel++)
4355 {
4356 enum elf_ppc_reloc_type r_type;
4357 unsigned long r_symndx;
4358 struct elf_link_hash_entry *h = NULL;
4359 char *tls_mask;
4360 char tls_set, tls_clear;
4361 bfd_boolean is_local;
4362 int expecting_tls_get_addr;
4363 bfd_signed_vma *got_count;
4364
4365 r_symndx = ELF32_R_SYM (rel->r_info);
4366 if (r_symndx >= symtab_hdr->sh_info)
4367 {
4368 struct elf_link_hash_entry **sym_hashes;
4369
4370 sym_hashes = elf_sym_hashes (ibfd);
4371 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4372 while (h->root.type == bfd_link_hash_indirect
4373 || h->root.type == bfd_link_hash_warning)
4374 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4375 }
4376
4377 expecting_tls_get_addr = 0;
4378 is_local = FALSE;
4379 if (h == NULL
4380 || !h->def_dynamic)
4381 is_local = TRUE;
4382
4383 r_type = ELF32_R_TYPE (rel->r_info);
4384 switch (r_type)
4385 {
4386 case R_PPC_GOT_TLSLD16:
4387 case R_PPC_GOT_TLSLD16_LO:
4388 expecting_tls_get_addr = 1;
4389 /* Fall thru */
4390
4391 case R_PPC_GOT_TLSLD16_HI:
4392 case R_PPC_GOT_TLSLD16_HA:
4393 /* These relocs should never be against a symbol
4394 defined in a shared lib. Leave them alone if
4395 that turns out to be the case. */
4396 if (!is_local)
4397 continue;
4398
4399 /* LD -> LE */
4400 tls_set = 0;
4401 tls_clear = TLS_LD;
4402 break;
4403
4404 case R_PPC_GOT_TLSGD16:
4405 case R_PPC_GOT_TLSGD16_LO:
4406 expecting_tls_get_addr = 1;
4407 /* Fall thru */
4408
4409 case R_PPC_GOT_TLSGD16_HI:
4410 case R_PPC_GOT_TLSGD16_HA:
4411 if (is_local)
4412 /* GD -> LE */
4413 tls_set = 0;
4414 else
4415 /* GD -> IE */
4416 tls_set = TLS_TLS | TLS_TPRELGD;
4417 tls_clear = TLS_GD;
4418 break;
4419
4420 case R_PPC_GOT_TPREL16:
4421 case R_PPC_GOT_TPREL16_LO:
4422 case R_PPC_GOT_TPREL16_HI:
4423 case R_PPC_GOT_TPREL16_HA:
4424 if (is_local)
4425 {
4426 /* IE -> LE */
4427 tls_set = 0;
4428 tls_clear = TLS_TPREL;
4429 break;
4430 }
4431 else
4432 continue;
4433
4434 default:
4435 continue;
4436 }
4437
4438 if (pass == 0)
4439 {
4440 if (!expecting_tls_get_addr)
4441 continue;
4442
4443 if (rel + 1 < relend)
4444 {
4445 enum elf_ppc_reloc_type r_type2;
4446 unsigned long r_symndx2;
4447 struct elf_link_hash_entry *h2;
4448
4449 /* The next instruction should be a call to
4450 __tls_get_addr. Peek at the reloc to be sure. */
4451 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4452 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4453 if (r_symndx2 >= symtab_hdr->sh_info
4454 && (r_type2 == R_PPC_REL14
4455 || r_type2 == R_PPC_REL14_BRTAKEN
4456 || r_type2 == R_PPC_REL14_BRNTAKEN
4457 || r_type2 == R_PPC_REL24
4458 || r_type2 == R_PPC_PLTREL24))
4459 {
4460 struct elf_link_hash_entry **sym_hashes;
4461
4462 sym_hashes = elf_sym_hashes (ibfd);
4463 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4464 while (h2->root.type == bfd_link_hash_indirect
4465 || h2->root.type == bfd_link_hash_warning)
4466 h2 = ((struct elf_link_hash_entry *)
4467 h2->root.u.i.link);
4468 if (h2 == htab->tls_get_addr)
4469 continue;
4470 }
4471 }
4472
4473 /* Uh oh, we didn't find the expected call. We
4474 could just mark this symbol to exclude it
4475 from tls optimization but it's safer to skip
4476 the entire section. */
4477 sec->has_tls_reloc = 0;
4478 break;
4479 }
4480
4481 if (h != NULL)
4482 {
4483 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4484 got_count = &h->got.refcount;
4485 }
4486 else
4487 {
4488 Elf_Internal_Sym *sym;
4489 bfd_signed_vma *lgot_refs;
4490 char *lgot_masks;
4491
4492 if (locsyms == NULL)
4493 {
4494 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4495 if (locsyms == NULL)
4496 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4497 symtab_hdr->sh_info,
4498 0, NULL, NULL, NULL);
4499 if (locsyms == NULL)
4500 {
4501 if (elf_section_data (sec)->relocs != relstart)
4502 free (relstart);
4503 return FALSE;
4504 }
4505 }
4506 sym = locsyms + r_symndx;
4507 lgot_refs = elf_local_got_refcounts (ibfd);
4508 if (lgot_refs == NULL)
4509 abort ();
4510 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4511 tls_mask = &lgot_masks[r_symndx];
4512 got_count = &lgot_refs[r_symndx];
4513 }
4514
4515 if (tls_set == 0)
4516 {
4517 /* We managed to get rid of a got entry. */
4518 if (*got_count > 0)
4519 *got_count -= 1;
4520 }
4521
4522 if (expecting_tls_get_addr)
4523 {
4524 struct plt_entry *ent;
4525
4526 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4527 if (ent != NULL && ent->plt.refcount > 0)
4528 ent->plt.refcount -= 1;
4529 }
4530
4531 *tls_mask |= tls_set;
4532 *tls_mask &= ~tls_clear;
4533 }
4534
4535 if (elf_section_data (sec)->relocs != relstart)
4536 free (relstart);
4537 }
4538
4539 if (locsyms != NULL
4540 && (symtab_hdr->contents != (unsigned char *) locsyms))
4541 {
4542 if (!info->keep_memory)
4543 free (locsyms);
4544 else
4545 symtab_hdr->contents = (unsigned char *) locsyms;
4546 }
4547 }
4548 return TRUE;
4549 }
4550 \f
4551 /* Return true if we have dynamic relocs that apply to read-only sections. */
4552
4553 static bfd_boolean
4554 readonly_dynrelocs (struct elf_link_hash_entry *h)
4555 {
4556 struct ppc_elf_dyn_relocs *p;
4557
4558 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4559 {
4560 asection *s = p->sec->output_section;
4561
4562 if (s != NULL
4563 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4564 == (SEC_READONLY | SEC_ALLOC)))
4565 return TRUE;
4566 }
4567 return FALSE;
4568 }
4569
4570 /* Adjust a symbol defined by a dynamic object and referenced by a
4571 regular object. The current definition is in some section of the
4572 dynamic object, but we're not including those sections. We have to
4573 change the definition to something the rest of the link can
4574 understand. */
4575
4576 static bfd_boolean
4577 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4578 struct elf_link_hash_entry *h)
4579 {
4580 struct ppc_elf_link_hash_table *htab;
4581 asection *s;
4582
4583 #ifdef DEBUG
4584 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4585 h->root.root.string);
4586 #endif
4587
4588 /* Make sure we know what is going on here. */
4589 htab = ppc_elf_hash_table (info);
4590 BFD_ASSERT (htab->elf.dynobj != NULL
4591 && (h->needs_plt
4592 || h->u.weakdef != NULL
4593 || (h->def_dynamic
4594 && h->ref_regular
4595 && !h->def_regular)));
4596
4597 /* Deal with function syms. */
4598 if (h->type == STT_FUNC
4599 || h->needs_plt)
4600 {
4601 /* Clear procedure linkage table information for any symbol that
4602 won't need a .plt entry. */
4603 struct plt_entry *ent;
4604 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4605 if (ent->plt.refcount > 0)
4606 break;
4607 if (ent == NULL
4608 || SYMBOL_CALLS_LOCAL (info, h)
4609 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4610 && h->root.type == bfd_link_hash_undefweak))
4611 {
4612 /* A PLT entry is not required/allowed when:
4613
4614 1. We are not using ld.so; because then the PLT entry
4615 can't be set up, so we can't use one. In this case,
4616 ppc_elf_adjust_dynamic_symbol won't even be called.
4617
4618 2. GC has rendered the entry unused.
4619
4620 3. We know for certain that a call to this symbol
4621 will go to this object, or will remain undefined. */
4622 h->plt.plist = NULL;
4623 h->needs_plt = 0;
4624 }
4625 else
4626 {
4627 /* After adjust_dynamic_symbol, non_got_ref set means that
4628 dyn_relocs for this symbol should be discarded.
4629 If we get here we know we are making a PLT entry for this
4630 symbol, and in an executable we'd normally resolve
4631 relocations against this symbol to the PLT entry. Allow
4632 dynamic relocs if the reference is weak, and the dynamic
4633 relocs will not cause text relocation. */
4634 if (!h->ref_regular_nonweak
4635 && h->non_got_ref
4636 && !htab->is_vxworks
4637 && !ppc_elf_hash_entry (h)->has_sda_refs
4638 && !readonly_dynrelocs (h))
4639 h->non_got_ref = 0;
4640 }
4641 return TRUE;
4642 }
4643 else
4644 h->plt.plist = NULL;
4645
4646 /* If this is a weak symbol, and there is a real definition, the
4647 processor independent code will have arranged for us to see the
4648 real definition first, and we can just use the same value. */
4649 if (h->u.weakdef != NULL)
4650 {
4651 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4652 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4653 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4654 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4655 if (ELIMINATE_COPY_RELOCS)
4656 h->non_got_ref = h->u.weakdef->non_got_ref;
4657 return TRUE;
4658 }
4659
4660 /* This is a reference to a symbol defined by a dynamic object which
4661 is not a function. */
4662
4663 /* If we are creating a shared library, we must presume that the
4664 only references to the symbol are via the global offset table.
4665 For such cases we need not do anything here; the relocations will
4666 be handled correctly by relocate_section. */
4667 if (info->shared)
4668 return TRUE;
4669
4670 /* If there are no references to this symbol that do not use the
4671 GOT, we don't need to generate a copy reloc. */
4672 if (!h->non_got_ref)
4673 return TRUE;
4674
4675 /* If we didn't find any dynamic relocs in read-only sections, then
4676 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4677 We can't do this if there are any small data relocations. This
4678 doesn't work on VxWorks, where we can not have dynamic
4679 relocations (other than copy and jump slot relocations) in an
4680 executable. */
4681 if (ELIMINATE_COPY_RELOCS
4682 && !ppc_elf_hash_entry (h)->has_sda_refs
4683 && !htab->is_vxworks
4684 && !h->def_regular
4685 && !readonly_dynrelocs (h))
4686 {
4687 h->non_got_ref = 0;
4688 return TRUE;
4689 }
4690
4691 if (h->size == 0)
4692 {
4693 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4694 h->root.root.string);
4695 return TRUE;
4696 }
4697
4698 /* We must allocate the symbol in our .dynbss section, which will
4699 become part of the .bss section of the executable. There will be
4700 an entry for this symbol in the .dynsym section. The dynamic
4701 object will contain position independent code, so all references
4702 from the dynamic object to this symbol will go through the global
4703 offset table. The dynamic linker will use the .dynsym entry to
4704 determine the address it must put in the global offset table, so
4705 both the dynamic object and the regular object will refer to the
4706 same memory location for the variable.
4707
4708 Of course, if the symbol is referenced using SDAREL relocs, we
4709 must instead allocate it in .sbss. */
4710
4711 if (ppc_elf_hash_entry (h)->has_sda_refs)
4712 s = htab->dynsbss;
4713 else
4714 s = htab->dynbss;
4715 BFD_ASSERT (s != NULL);
4716
4717 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4718 copy the initial value out of the dynamic object and into the
4719 runtime process image. We need to remember the offset into the
4720 .rela.bss section we are going to use. */
4721 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4722 {
4723 asection *srel;
4724
4725 if (ppc_elf_hash_entry (h)->has_sda_refs)
4726 srel = htab->relsbss;
4727 else
4728 srel = htab->relbss;
4729 BFD_ASSERT (srel != NULL);
4730 srel->size += sizeof (Elf32_External_Rela);
4731 h->needs_copy = 1;
4732 }
4733
4734 return _bfd_elf_adjust_dynamic_copy (h, s);
4735 }
4736 \f
4737 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4738 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4739 specifying the addend on the plt relocation. For -fpic code, the sym
4740 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4741 xxxxxxxx.got2.plt_pic32.<callee>. */
4742
4743 static bfd_boolean
4744 add_stub_sym (struct plt_entry *ent,
4745 struct elf_link_hash_entry *h,
4746 struct bfd_link_info *info)
4747 {
4748 struct elf_link_hash_entry *sh;
4749 size_t len1, len2, len3;
4750 char *name;
4751 const char *stub;
4752 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4753
4754 if (info->shared || info->pie)
4755 stub = ".plt_pic32.";
4756 else
4757 stub = ".plt_call32.";
4758
4759 len1 = strlen (h->root.root.string);
4760 len2 = strlen (stub);
4761 len3 = 0;
4762 if (ent->sec)
4763 len3 = strlen (ent->sec->name);
4764 name = bfd_malloc (len1 + len2 + len3 + 9);
4765 if (name == NULL)
4766 return FALSE;
4767 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4768 if (ent->sec)
4769 memcpy (name + 8, ent->sec->name, len3);
4770 memcpy (name + 8 + len3, stub, len2);
4771 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4772 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4773 if (sh == NULL)
4774 return FALSE;
4775 if (sh->root.type == bfd_link_hash_new)
4776 {
4777 sh->root.type = bfd_link_hash_defined;
4778 sh->root.u.def.section = htab->glink;
4779 sh->root.u.def.value = ent->glink_offset;
4780 sh->ref_regular = 1;
4781 sh->def_regular = 1;
4782 sh->ref_regular_nonweak = 1;
4783 sh->forced_local = 1;
4784 sh->non_elf = 0;
4785 }
4786 return TRUE;
4787 }
4788
4789 /* Allocate NEED contiguous space in .got, and return the offset.
4790 Handles allocation of the got header when crossing 32k. */
4791
4792 static bfd_vma
4793 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4794 {
4795 bfd_vma where;
4796 unsigned int max_before_header;
4797
4798 if (htab->plt_type == PLT_VXWORKS)
4799 {
4800 where = htab->got->size;
4801 htab->got->size += need;
4802 }
4803 else
4804 {
4805 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4806 if (need <= htab->got_gap)
4807 {
4808 where = max_before_header - htab->got_gap;
4809 htab->got_gap -= need;
4810 }
4811 else
4812 {
4813 if (htab->got->size + need > max_before_header
4814 && htab->got->size <= max_before_header)
4815 {
4816 htab->got_gap = max_before_header - htab->got->size;
4817 htab->got->size = max_before_header + htab->got_header_size;
4818 }
4819 where = htab->got->size;
4820 htab->got->size += need;
4821 }
4822 }
4823 return where;
4824 }
4825
4826 /* Allocate space in associated reloc sections for dynamic relocs. */
4827
4828 static bfd_boolean
4829 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4830 {
4831 struct bfd_link_info *info = inf;
4832 struct ppc_elf_link_hash_entry *eh;
4833 struct ppc_elf_link_hash_table *htab;
4834 struct ppc_elf_dyn_relocs *p;
4835
4836 if (h->root.type == bfd_link_hash_indirect)
4837 return TRUE;
4838
4839 if (h->root.type == bfd_link_hash_warning)
4840 /* When warning symbols are created, they **replace** the "real"
4841 entry in the hash table, thus we never get to see the real
4842 symbol in a hash traversal. So look at it now. */
4843 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4844
4845 htab = ppc_elf_hash_table (info);
4846 if (htab->elf.dynamic_sections_created)
4847 {
4848 struct plt_entry *ent;
4849 bfd_boolean doneone = FALSE;
4850 bfd_vma plt_offset = 0, glink_offset = 0;
4851
4852 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4853 if (ent->plt.refcount > 0)
4854 {
4855 /* Make sure this symbol is output as a dynamic symbol. */
4856 if (h->dynindx == -1
4857 && !h->forced_local)
4858 {
4859 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4860 return FALSE;
4861 }
4862
4863 if (info->shared
4864 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4865 {
4866 asection *s = htab->plt;
4867
4868 if (htab->plt_type == PLT_NEW)
4869 {
4870 if (!doneone)
4871 {
4872 plt_offset = s->size;
4873 s->size += 4;
4874 }
4875 ent->plt.offset = plt_offset;
4876
4877 s = htab->glink;
4878 if (!doneone || info->shared || info->pie)
4879 {
4880 glink_offset = s->size;
4881 s->size += GLINK_ENTRY_SIZE;
4882 }
4883 if (!doneone
4884 && !info->shared
4885 && h->def_dynamic
4886 && !h->def_regular)
4887 {
4888 h->root.u.def.section = s;
4889 h->root.u.def.value = glink_offset;
4890 }
4891 ent->glink_offset = glink_offset;
4892
4893 if (htab->emit_stub_syms
4894 && !add_stub_sym (ent, h, info))
4895 return FALSE;
4896 }
4897 else
4898 {
4899 if (!doneone)
4900 {
4901 /* If this is the first .plt entry, make room
4902 for the special first entry. */
4903 if (s->size == 0)
4904 s->size += htab->plt_initial_entry_size;
4905
4906 /* The PowerPC PLT is actually composed of two
4907 parts, the first part is 2 words (for a load
4908 and a jump), and then there is a remaining
4909 word available at the end. */
4910 plt_offset = (htab->plt_initial_entry_size
4911 + (htab->plt_slot_size
4912 * ((s->size
4913 - htab->plt_initial_entry_size)
4914 / htab->plt_entry_size)));
4915
4916 /* If this symbol is not defined in a regular
4917 file, and we are not generating a shared
4918 library, then set the symbol to this location
4919 in the .plt. This is required to make
4920 function pointers compare as equal between
4921 the normal executable and the shared library. */
4922 if (! info->shared
4923 && h->def_dynamic
4924 && !h->def_regular)
4925 {
4926 h->root.u.def.section = s;
4927 h->root.u.def.value = plt_offset;
4928 }
4929
4930 /* Make room for this entry. */
4931 s->size += htab->plt_entry_size;
4932 /* After the 8192nd entry, room for two entries
4933 is allocated. */
4934 if (htab->plt_type == PLT_OLD
4935 && (s->size - htab->plt_initial_entry_size)
4936 / htab->plt_entry_size
4937 > PLT_NUM_SINGLE_ENTRIES)
4938 s->size += htab->plt_entry_size;
4939 }
4940 ent->plt.offset = plt_offset;
4941 }
4942
4943 /* We also need to make an entry in the .rela.plt section. */
4944 if (!doneone)
4945 {
4946 htab->relplt->size += sizeof (Elf32_External_Rela);
4947
4948 if (htab->plt_type == PLT_VXWORKS)
4949 {
4950 /* Allocate space for the unloaded relocations. */
4951 if (!info->shared)
4952 {
4953 if (ent->plt.offset
4954 == (bfd_vma) htab->plt_initial_entry_size)
4955 {
4956 htab->srelplt2->size
4957 += sizeof (Elf32_External_Rela)
4958 * VXWORKS_PLTRESOLVE_RELOCS;
4959 }
4960
4961 htab->srelplt2->size
4962 += sizeof (Elf32_External_Rela)
4963 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4964 }
4965
4966 /* Every PLT entry has an associated GOT entry in
4967 .got.plt. */
4968 htab->sgotplt->size += 4;
4969 }
4970 doneone = TRUE;
4971 }
4972 }
4973 else
4974 ent->plt.offset = (bfd_vma) -1;
4975 }
4976 else
4977 ent->plt.offset = (bfd_vma) -1;
4978
4979 if (!doneone)
4980 {
4981 h->plt.plist = NULL;
4982 h->needs_plt = 0;
4983 }
4984 }
4985 else
4986 {
4987 h->plt.plist = NULL;
4988 h->needs_plt = 0;
4989 }
4990
4991 eh = (struct ppc_elf_link_hash_entry *) h;
4992 if (eh->elf.got.refcount > 0)
4993 {
4994 /* Make sure this symbol is output as a dynamic symbol. */
4995 if (eh->elf.dynindx == -1
4996 && !eh->elf.forced_local)
4997 {
4998 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4999 return FALSE;
5000 }
5001
5002 if (eh->tls_mask == (TLS_TLS | TLS_LD)
5003 && !eh->elf.def_dynamic)
5004 {
5005 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
5006 htab->tlsld_got.refcount += 1;
5007 eh->elf.got.offset = (bfd_vma) -1;
5008 }
5009 else
5010 {
5011 bfd_boolean dyn;
5012 unsigned int need = 0;
5013 if ((eh->tls_mask & TLS_TLS) != 0)
5014 {
5015 if ((eh->tls_mask & TLS_LD) != 0)
5016 need += 8;
5017 if ((eh->tls_mask & TLS_GD) != 0)
5018 need += 8;
5019 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5020 need += 4;
5021 if ((eh->tls_mask & TLS_DTPREL) != 0)
5022 need += 4;
5023 }
5024 else
5025 need += 4;
5026 eh->elf.got.offset = allocate_got (htab, need);
5027 dyn = htab->elf.dynamic_sections_created;
5028 if ((info->shared
5029 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5030 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5031 || eh->elf.root.type != bfd_link_hash_undefweak))
5032 {
5033 /* All the entries we allocated need relocs.
5034 Except LD only needs one. */
5035 if ((eh->tls_mask & TLS_LD) != 0)
5036 need -= 4;
5037 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
5038 }
5039 }
5040 }
5041 else
5042 eh->elf.got.offset = (bfd_vma) -1;
5043
5044 if (eh->dyn_relocs == NULL)
5045 return TRUE;
5046
5047 /* In the shared -Bsymbolic case, discard space allocated for
5048 dynamic pc-relative relocs against symbols which turn out to be
5049 defined in regular objects. For the normal shared case, discard
5050 space for relocs that have become local due to symbol visibility
5051 changes. */
5052
5053 if (info->shared)
5054 {
5055 /* Relocs that use pc_count are those that appear on a call insn,
5056 or certain REL relocs (see must_be_dyn_reloc) that can be
5057 generated via assembly. We want calls to protected symbols to
5058 resolve directly to the function rather than going via the plt.
5059 If people want function pointer comparisons to work as expected
5060 then they should avoid writing weird assembly. */
5061 if (SYMBOL_CALLS_LOCAL (info, h))
5062 {
5063 struct ppc_elf_dyn_relocs **pp;
5064
5065 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5066 {
5067 p->count -= p->pc_count;
5068 p->pc_count = 0;
5069 if (p->count == 0)
5070 *pp = p->next;
5071 else
5072 pp = &p->next;
5073 }
5074 }
5075
5076 if (htab->is_vxworks)
5077 {
5078 struct ppc_elf_dyn_relocs **pp;
5079
5080 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5081 {
5082 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5083 *pp = p->next;
5084 else
5085 pp = &p->next;
5086 }
5087 }
5088
5089 /* Discard relocs on undefined symbols that must be local. */
5090 if (eh->dyn_relocs != NULL
5091 && h->root.type == bfd_link_hash_undefined
5092 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5093 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5094 eh->dyn_relocs = NULL;
5095
5096 /* Also discard relocs on undefined weak syms with non-default
5097 visibility. */
5098 if (eh->dyn_relocs != NULL
5099 && h->root.type == bfd_link_hash_undefweak)
5100 {
5101 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5102 eh->dyn_relocs = NULL;
5103
5104 /* Make sure undefined weak symbols are output as a dynamic
5105 symbol in PIEs. */
5106 else if (h->dynindx == -1
5107 && !h->forced_local)
5108 {
5109 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5110 return FALSE;
5111 }
5112 }
5113 }
5114 else if (ELIMINATE_COPY_RELOCS)
5115 {
5116 /* For the non-shared case, discard space for relocs against
5117 symbols which turn out to need copy relocs or are not
5118 dynamic. */
5119
5120 if (!h->non_got_ref
5121 && !h->def_regular)
5122 {
5123 /* Make sure this symbol is output as a dynamic symbol.
5124 Undefined weak syms won't yet be marked as dynamic. */
5125 if (h->dynindx == -1
5126 && !h->forced_local)
5127 {
5128 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5129 return FALSE;
5130 }
5131
5132 /* If that succeeded, we know we'll be keeping all the
5133 relocs. */
5134 if (h->dynindx != -1)
5135 goto keep;
5136 }
5137
5138 eh->dyn_relocs = NULL;
5139
5140 keep: ;
5141 }
5142
5143 /* Finally, allocate space. */
5144 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5145 {
5146 asection *sreloc = elf_section_data (p->sec)->sreloc;
5147 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5148 }
5149
5150 return TRUE;
5151 }
5152
5153 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5154 read-only sections. */
5155
5156 static bfd_boolean
5157 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5158 {
5159 if (h->root.type == bfd_link_hash_indirect)
5160 return TRUE;
5161
5162 if (h->root.type == bfd_link_hash_warning)
5163 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5164
5165 if (readonly_dynrelocs (h))
5166 {
5167 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5168
5169 /* Not an error, just cut short the traversal. */
5170 return FALSE;
5171 }
5172 return TRUE;
5173 }
5174
5175 /* Set the sizes of the dynamic sections. */
5176
5177 static bfd_boolean
5178 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5179 struct bfd_link_info *info)
5180 {
5181 struct ppc_elf_link_hash_table *htab;
5182 asection *s;
5183 bfd_boolean relocs;
5184 bfd *ibfd;
5185
5186 #ifdef DEBUG
5187 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5188 #endif
5189
5190 htab = ppc_elf_hash_table (info);
5191 BFD_ASSERT (htab->elf.dynobj != NULL);
5192
5193 if (elf_hash_table (info)->dynamic_sections_created)
5194 {
5195 /* Set the contents of the .interp section to the interpreter. */
5196 if (info->executable)
5197 {
5198 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5199 BFD_ASSERT (s != NULL);
5200 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5201 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5202 }
5203 }
5204
5205 if (htab->plt_type == PLT_OLD)
5206 htab->got_header_size = 16;
5207 else if (htab->plt_type == PLT_NEW)
5208 htab->got_header_size = 12;
5209
5210 /* Set up .got offsets for local syms, and space for local dynamic
5211 relocs. */
5212 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5213 {
5214 bfd_signed_vma *local_got;
5215 bfd_signed_vma *end_local_got;
5216 char *lgot_masks;
5217 bfd_size_type locsymcount;
5218 Elf_Internal_Shdr *symtab_hdr;
5219
5220 if (!is_ppc_elf (ibfd))
5221 continue;
5222
5223 for (s = ibfd->sections; s != NULL; s = s->next)
5224 {
5225 struct ppc_elf_dyn_relocs *p;
5226
5227 for (p = ((struct ppc_elf_dyn_relocs *)
5228 elf_section_data (s)->local_dynrel);
5229 p != NULL;
5230 p = p->next)
5231 {
5232 if (!bfd_is_abs_section (p->sec)
5233 && bfd_is_abs_section (p->sec->output_section))
5234 {
5235 /* Input section has been discarded, either because
5236 it is a copy of a linkonce section or due to
5237 linker script /DISCARD/, so we'll be discarding
5238 the relocs too. */
5239 }
5240 else if (htab->is_vxworks
5241 && strcmp (p->sec->output_section->name,
5242 ".tls_vars") == 0)
5243 {
5244 /* Relocations in vxworks .tls_vars sections are
5245 handled specially by the loader. */
5246 }
5247 else if (p->count != 0)
5248 {
5249 elf_section_data (p->sec)->sreloc->size
5250 += p->count * sizeof (Elf32_External_Rela);
5251 if ((p->sec->output_section->flags
5252 & (SEC_READONLY | SEC_ALLOC))
5253 == (SEC_READONLY | SEC_ALLOC))
5254 info->flags |= DF_TEXTREL;
5255 }
5256 }
5257 }
5258
5259 local_got = elf_local_got_refcounts (ibfd);
5260 if (!local_got)
5261 continue;
5262
5263 symtab_hdr = &elf_symtab_hdr (ibfd);
5264 locsymcount = symtab_hdr->sh_info;
5265 end_local_got = local_got + locsymcount;
5266 lgot_masks = (char *) end_local_got;
5267 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5268 if (*local_got > 0)
5269 {
5270 if (*lgot_masks == (TLS_TLS | TLS_LD))
5271 {
5272 /* If just an LD reloc, we'll just use
5273 htab->tlsld_got.offset. */
5274 htab->tlsld_got.refcount += 1;
5275 *local_got = (bfd_vma) -1;
5276 }
5277 else
5278 {
5279 unsigned int need = 0;
5280 if ((*lgot_masks & TLS_TLS) != 0)
5281 {
5282 if ((*lgot_masks & TLS_GD) != 0)
5283 need += 8;
5284 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5285 need += 4;
5286 if ((*lgot_masks & TLS_DTPREL) != 0)
5287 need += 4;
5288 }
5289 else
5290 need += 4;
5291 *local_got = allocate_got (htab, need);
5292 if (info->shared)
5293 htab->relgot->size += (need
5294 * (sizeof (Elf32_External_Rela) / 4));
5295 }
5296 }
5297 else
5298 *local_got = (bfd_vma) -1;
5299 }
5300
5301 /* Allocate space for global sym dynamic relocs. */
5302 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5303
5304 if (htab->tlsld_got.refcount > 0)
5305 {
5306 htab->tlsld_got.offset = allocate_got (htab, 8);
5307 if (info->shared)
5308 htab->relgot->size += sizeof (Elf32_External_Rela);
5309 }
5310 else
5311 htab->tlsld_got.offset = (bfd_vma) -1;
5312
5313 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5314 {
5315 unsigned int g_o_t = 32768;
5316
5317 /* If we haven't allocated the header, do so now. When we get here,
5318 for old plt/got the got size will be 0 to 32764 (not allocated),
5319 or 32780 to 65536 (header allocated). For new plt/got, the
5320 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5321 if (htab->got->size <= 32768)
5322 {
5323 g_o_t = htab->got->size;
5324 if (htab->plt_type == PLT_OLD)
5325 g_o_t += 4;
5326 htab->got->size += htab->got_header_size;
5327 }
5328
5329 htab->elf.hgot->root.u.def.value = g_o_t;
5330 }
5331
5332 if (htab->glink != NULL && htab->glink->size != 0)
5333 {
5334 htab->glink_pltresolve = htab->glink->size;
5335 /* Space for the branch table. */
5336 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5337 /* Pad out to align the start of PLTresolve. */
5338 htab->glink->size += -htab->glink->size & 15;
5339 htab->glink->size += GLINK_PLTRESOLVE;
5340
5341 if (htab->emit_stub_syms)
5342 {
5343 struct elf_link_hash_entry *sh;
5344 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5345 TRUE, FALSE, FALSE);
5346 if (sh == NULL)
5347 return FALSE;
5348 if (sh->root.type == bfd_link_hash_new)
5349 {
5350 sh->root.type = bfd_link_hash_defined;
5351 sh->root.u.def.section = htab->glink;
5352 sh->root.u.def.value = htab->glink_pltresolve;
5353 sh->ref_regular = 1;
5354 sh->def_regular = 1;
5355 sh->ref_regular_nonweak = 1;
5356 sh->forced_local = 1;
5357 sh->non_elf = 0;
5358 }
5359 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5360 TRUE, FALSE, FALSE);
5361 if (sh == NULL)
5362 return FALSE;
5363 if (sh->root.type == bfd_link_hash_new)
5364 {
5365 sh->root.type = bfd_link_hash_defined;
5366 sh->root.u.def.section = htab->glink;
5367 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5368 sh->ref_regular = 1;
5369 sh->def_regular = 1;
5370 sh->ref_regular_nonweak = 1;
5371 sh->forced_local = 1;
5372 sh->non_elf = 0;
5373 }
5374 }
5375 }
5376
5377 /* We've now determined the sizes of the various dynamic sections.
5378 Allocate memory for them. */
5379 relocs = FALSE;
5380 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5381 {
5382 bfd_boolean strip_section = TRUE;
5383
5384 if ((s->flags & SEC_LINKER_CREATED) == 0)
5385 continue;
5386
5387 if (s == htab->plt
5388 || s == htab->glink
5389 || s == htab->got
5390 || s == htab->sgotplt
5391 || s == htab->sbss
5392 || s == htab->dynbss
5393 || s == htab->dynsbss)
5394 {
5395 /* We'd like to strip these sections if they aren't needed, but if
5396 we've exported dynamic symbols from them we must leave them.
5397 It's too late to tell BFD to get rid of the symbols. */
5398 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5399 strip_section = FALSE;
5400 /* Strip this section if we don't need it; see the
5401 comment below. */
5402 }
5403 else if (s == htab->sdata[0].section
5404 || s == htab->sdata[1].section)
5405 {
5406 /* Strip these too. */
5407 }
5408 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5409 {
5410 if (s->size != 0)
5411 {
5412 /* Remember whether there are any relocation sections. */
5413 relocs = TRUE;
5414
5415 /* We use the reloc_count field as a counter if we need
5416 to copy relocs into the output file. */
5417 s->reloc_count = 0;
5418 }
5419 }
5420 else
5421 {
5422 /* It's not one of our sections, so don't allocate space. */
5423 continue;
5424 }
5425
5426 if (s->size == 0 && strip_section)
5427 {
5428 /* If we don't need this section, strip it from the
5429 output file. This is mostly to handle .rela.bss and
5430 .rela.plt. We must create both sections in
5431 create_dynamic_sections, because they must be created
5432 before the linker maps input sections to output
5433 sections. The linker does that before
5434 adjust_dynamic_symbol is called, and it is that
5435 function which decides whether anything needs to go
5436 into these sections. */
5437 s->flags |= SEC_EXCLUDE;
5438 continue;
5439 }
5440
5441 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5442 continue;
5443
5444 /* Allocate memory for the section contents. */
5445 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5446 if (s->contents == NULL)
5447 return FALSE;
5448 }
5449
5450 if (htab->elf.dynamic_sections_created)
5451 {
5452 /* Add some entries to the .dynamic section. We fill in the
5453 values later, in ppc_elf_finish_dynamic_sections, but we
5454 must add the entries now so that we get the correct size for
5455 the .dynamic section. The DT_DEBUG entry is filled in by the
5456 dynamic linker and used by the debugger. */
5457 #define add_dynamic_entry(TAG, VAL) \
5458 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5459
5460 if (info->executable)
5461 {
5462 if (!add_dynamic_entry (DT_DEBUG, 0))
5463 return FALSE;
5464 }
5465
5466 if (htab->plt != NULL && htab->plt->size != 0)
5467 {
5468 if (!add_dynamic_entry (DT_PLTGOT, 0)
5469 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5470 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5471 || !add_dynamic_entry (DT_JMPREL, 0))
5472 return FALSE;
5473 }
5474
5475 if (htab->glink != NULL && htab->glink->size != 0)
5476 {
5477 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5478 return FALSE;
5479 }
5480
5481 if (relocs)
5482 {
5483 if (!add_dynamic_entry (DT_RELA, 0)
5484 || !add_dynamic_entry (DT_RELASZ, 0)
5485 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5486 return FALSE;
5487 }
5488
5489 /* If any dynamic relocs apply to a read-only section, then we
5490 need a DT_TEXTREL entry. */
5491 if ((info->flags & DF_TEXTREL) == 0)
5492 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5493 info);
5494
5495 if ((info->flags & DF_TEXTREL) != 0)
5496 {
5497 if (!add_dynamic_entry (DT_TEXTREL, 0))
5498 return FALSE;
5499 }
5500 if (htab->is_vxworks
5501 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5502 return FALSE;
5503 }
5504 #undef add_dynamic_entry
5505
5506 return TRUE;
5507 }
5508
5509 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5510
5511 static bfd_boolean
5512 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5513 {
5514 if (h->plt.plist != NULL
5515 && !h->def_regular
5516 && (!h->pointer_equality_needed
5517 || !h->ref_regular_nonweak))
5518 return FALSE;
5519
5520 return _bfd_elf_hash_symbol (h);
5521 }
5522 \f
5523 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5524
5525 static const int shared_stub_entry[] =
5526 {
5527 0x7c0802a6, /* mflr 0 */
5528 0x429f0005, /* bcl 20, 31, .Lxxx */
5529 0x7d6802a6, /* mflr 11 */
5530 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5531 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5532 0x7c0803a6, /* mtlr 0 */
5533 0x7d6903a6, /* mtctr 11 */
5534 0x4e800420, /* bctr */
5535 };
5536
5537 static const int stub_entry[] =
5538 {
5539 0x3d600000, /* lis 11,xxx@ha */
5540 0x396b0000, /* addi 11,11,xxx@l */
5541 0x7d6903a6, /* mtctr 11 */
5542 0x4e800420, /* bctr */
5543 };
5544
5545 static bfd_boolean
5546 ppc_elf_relax_section (bfd *abfd,
5547 asection *isec,
5548 struct bfd_link_info *link_info,
5549 bfd_boolean *again)
5550 {
5551 struct one_fixup
5552 {
5553 struct one_fixup *next;
5554 asection *tsec;
5555 bfd_vma toff;
5556 bfd_vma trampoff;
5557 };
5558
5559 Elf_Internal_Shdr *symtab_hdr;
5560 bfd_byte *contents = NULL;
5561 Elf_Internal_Sym *isymbuf = NULL;
5562 Elf_Internal_Rela *internal_relocs = NULL;
5563 Elf_Internal_Rela *irel, *irelend;
5564 struct one_fixup *fixups = NULL;
5565 bfd_boolean changed;
5566 struct ppc_elf_link_hash_table *htab;
5567 bfd_size_type trampoff;
5568 asection *got2;
5569
5570 *again = FALSE;
5571
5572 /* Nothing to do if there are no relocations, and no need to do
5573 anything with non-alloc sections. */
5574 if ((isec->flags & SEC_ALLOC) == 0
5575 || (isec->flags & SEC_RELOC) == 0
5576 || isec->reloc_count == 0)
5577 return TRUE;
5578
5579 trampoff = (isec->size + 3) & (bfd_vma) -4;
5580 /* Space for a branch around any trampolines. */
5581 trampoff += 4;
5582
5583 symtab_hdr = &elf_symtab_hdr (abfd);
5584
5585 /* Get a copy of the native relocations. */
5586 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5587 link_info->keep_memory);
5588 if (internal_relocs == NULL)
5589 goto error_return;
5590
5591 htab = ppc_elf_hash_table (link_info);
5592 got2 = bfd_get_section_by_name (abfd, ".got2");
5593
5594 irelend = internal_relocs + isec->reloc_count;
5595 for (irel = internal_relocs; irel < irelend; irel++)
5596 {
5597 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5598 bfd_vma symaddr, reladdr, toff, roff;
5599 asection *tsec;
5600 struct one_fixup *f;
5601 size_t insn_offset = 0;
5602 bfd_vma max_branch_offset, val;
5603 bfd_byte *hit_addr;
5604 unsigned long t0;
5605 unsigned char sym_type;
5606
5607 switch (r_type)
5608 {
5609 case R_PPC_REL24:
5610 case R_PPC_LOCAL24PC:
5611 case R_PPC_PLTREL24:
5612 max_branch_offset = 1 << 25;
5613 break;
5614
5615 case R_PPC_REL14:
5616 case R_PPC_REL14_BRTAKEN:
5617 case R_PPC_REL14_BRNTAKEN:
5618 max_branch_offset = 1 << 15;
5619 break;
5620
5621 default:
5622 continue;
5623 }
5624
5625 /* Get the value of the symbol referred to by the reloc. */
5626 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5627 {
5628 /* A local symbol. */
5629 Elf_Internal_Sym *isym;
5630
5631 /* Read this BFD's local symbols. */
5632 if (isymbuf == NULL)
5633 {
5634 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5635 if (isymbuf == NULL)
5636 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5637 symtab_hdr->sh_info, 0,
5638 NULL, NULL, NULL);
5639 if (isymbuf == 0)
5640 goto error_return;
5641 }
5642 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5643 if (isym->st_shndx == SHN_UNDEF)
5644 continue; /* We can't do anything with undefined symbols. */
5645 else if (isym->st_shndx == SHN_ABS)
5646 tsec = bfd_abs_section_ptr;
5647 else if (isym->st_shndx == SHN_COMMON)
5648 tsec = bfd_com_section_ptr;
5649 else
5650 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5651
5652 toff = isym->st_value;
5653 sym_type = ELF_ST_TYPE (isym->st_info);
5654 }
5655 else
5656 {
5657 /* Global symbol handling. */
5658 unsigned long indx;
5659 struct elf_link_hash_entry *h;
5660
5661 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5662 h = elf_sym_hashes (abfd)[indx];
5663
5664 while (h->root.type == bfd_link_hash_indirect
5665 || h->root.type == bfd_link_hash_warning)
5666 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5667
5668 tsec = NULL;
5669 toff = 0;
5670 if (r_type == R_PPC_PLTREL24
5671 && htab->plt != NULL)
5672 {
5673 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5674
5675 if (ent != NULL)
5676 {
5677 if (htab->plt_type == PLT_NEW)
5678 {
5679 tsec = htab->glink;
5680 toff = ent->glink_offset;
5681 }
5682 else
5683 {
5684 tsec = htab->plt;
5685 toff = ent->plt.offset;
5686 }
5687 }
5688 }
5689 if (tsec != NULL)
5690 ;
5691 else if (h->root.type == bfd_link_hash_defined
5692 || h->root.type == bfd_link_hash_defweak)
5693 {
5694 tsec = h->root.u.def.section;
5695 toff = h->root.u.def.value;
5696 }
5697 else
5698 continue;
5699
5700 sym_type = h->type;
5701 }
5702
5703 /* If the branch and target are in the same section, you have
5704 no hope of adding stubs. We'll error out later should the
5705 branch overflow. */
5706 if (tsec == isec)
5707 continue;
5708
5709 /* There probably isn't any reason to handle symbols in
5710 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5711 attribute for a code section, and we are only looking at
5712 branches. However, implement it correctly here as a
5713 reference for other target relax_section functions. */
5714 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5715 {
5716 /* At this stage in linking, no SEC_MERGE symbol has been
5717 adjusted, so all references to such symbols need to be
5718 passed through _bfd_merged_section_offset. (Later, in
5719 relocate_section, all SEC_MERGE symbols *except* for
5720 section symbols have been adjusted.)
5721
5722 gas may reduce relocations against symbols in SEC_MERGE
5723 sections to a relocation against the section symbol when
5724 the original addend was zero. When the reloc is against
5725 a section symbol we should include the addend in the
5726 offset passed to _bfd_merged_section_offset, since the
5727 location of interest is the original symbol. On the
5728 other hand, an access to "sym+addend" where "sym" is not
5729 a section symbol should not include the addend; Such an
5730 access is presumed to be an offset from "sym"; The
5731 location of interest is just "sym". */
5732 if (sym_type == STT_SECTION)
5733 toff += irel->r_addend;
5734
5735 toff = _bfd_merged_section_offset (abfd, &tsec,
5736 elf_section_data (tsec)->sec_info,
5737 toff);
5738
5739 if (sym_type != STT_SECTION)
5740 toff += irel->r_addend;
5741 }
5742 /* PLTREL24 addends are special. */
5743 else if (r_type != R_PPC_PLTREL24)
5744 toff += irel->r_addend;
5745
5746 /* Attempted -shared link of non-pic code loses. */
5747 if (tsec->output_section == NULL)
5748 continue;
5749
5750 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5751
5752 roff = irel->r_offset;
5753 reladdr = isec->output_section->vma + isec->output_offset + roff;
5754
5755 /* If the branch is in range, no need to do anything. */
5756 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5757 continue;
5758
5759 /* Look for an existing fixup to this address. */
5760 for (f = fixups; f ; f = f->next)
5761 if (f->tsec == tsec && f->toff == toff)
5762 break;
5763
5764 if (f == NULL)
5765 {
5766 size_t size;
5767 unsigned long stub_rtype;
5768
5769 val = trampoff - roff;
5770 if (val >= max_branch_offset)
5771 /* Oh dear, we can't reach a trampoline. Don't try to add
5772 one. We'll report an error later. */
5773 continue;
5774
5775 if (link_info->shared)
5776 {
5777 size = 4 * ARRAY_SIZE (shared_stub_entry);
5778 insn_offset = 12;
5779 stub_rtype = R_PPC_RELAX32PC;
5780 }
5781 else
5782 {
5783 size = 4 * ARRAY_SIZE (stub_entry);
5784 insn_offset = 0;
5785 stub_rtype = R_PPC_RELAX32;
5786 }
5787
5788 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5789 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5790 abort ();
5791 if (tsec == htab->plt
5792 || tsec == htab->glink)
5793 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5794
5795 /* Hijack the old relocation. Since we need two
5796 relocations for this use a "composite" reloc. */
5797 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5798 stub_rtype);
5799 irel->r_offset = trampoff + insn_offset;
5800 if (r_type == R_PPC_PLTREL24)
5801 irel->r_addend = 0;
5802
5803 /* Record the fixup so we don't do it again this section. */
5804 f = bfd_malloc (sizeof (*f));
5805 f->next = fixups;
5806 f->tsec = tsec;
5807 f->toff = toff;
5808 f->trampoff = trampoff;
5809 fixups = f;
5810
5811 trampoff += size;
5812 }
5813 else
5814 {
5815 val = f->trampoff - roff;
5816 if (val >= max_branch_offset)
5817 continue;
5818
5819 /* Nop out the reloc, since we're finalizing things here. */
5820 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5821 }
5822
5823 /* Get the section contents. */
5824 if (contents == NULL)
5825 {
5826 /* Get cached copy if it exists. */
5827 if (elf_section_data (isec)->this_hdr.contents != NULL)
5828 contents = elf_section_data (isec)->this_hdr.contents;
5829 else
5830 {
5831 /* Go get them off disk. */
5832 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5833 goto error_return;
5834 }
5835 }
5836
5837 /* Fix up the existing branch to hit the trampoline. */
5838 hit_addr = contents + roff;
5839 switch (r_type)
5840 {
5841 case R_PPC_REL24:
5842 case R_PPC_LOCAL24PC:
5843 case R_PPC_PLTREL24:
5844 t0 = bfd_get_32 (abfd, hit_addr);
5845 t0 &= ~0x3fffffc;
5846 t0 |= val & 0x3fffffc;
5847 bfd_put_32 (abfd, t0, hit_addr);
5848 break;
5849
5850 case R_PPC_REL14:
5851 case R_PPC_REL14_BRTAKEN:
5852 case R_PPC_REL14_BRNTAKEN:
5853 t0 = bfd_get_32 (abfd, hit_addr);
5854 t0 &= ~0xfffc;
5855 t0 |= val & 0xfffc;
5856 bfd_put_32 (abfd, t0, hit_addr);
5857 break;
5858 }
5859 }
5860
5861 /* Write out the trampolines. */
5862 changed = fixups != NULL;
5863 if (fixups != NULL)
5864 {
5865 const int *stub;
5866 bfd_byte *dest;
5867 bfd_vma val;
5868 int i, size;
5869
5870 do
5871 {
5872 struct one_fixup *f = fixups;
5873 fixups = fixups->next;
5874 free (f);
5875 }
5876 while (fixups);
5877
5878 contents = bfd_realloc_or_free (contents, trampoff);
5879 if (contents == NULL)
5880 goto error_return;
5881
5882 isec->size = (isec->size + 3) & (bfd_vma) -4;
5883 /* Branch around the trampolines. */
5884 val = B + trampoff - isec->size;
5885 dest = contents + isec->size;
5886 isec->size = trampoff;
5887 bfd_put_32 (abfd, val, dest);
5888 dest += 4;
5889
5890 if (link_info->shared)
5891 {
5892 stub = shared_stub_entry;
5893 size = ARRAY_SIZE (shared_stub_entry);
5894 }
5895 else
5896 {
5897 stub = stub_entry;
5898 size = ARRAY_SIZE (stub_entry);
5899 }
5900
5901 i = 0;
5902 while (dest < contents + trampoff)
5903 {
5904 bfd_put_32 (abfd, stub[i], dest);
5905 i++;
5906 if (i == size)
5907 i = 0;
5908 dest += 4;
5909 }
5910 BFD_ASSERT (i == 0);
5911 }
5912
5913 if (isymbuf != NULL
5914 && symtab_hdr->contents != (unsigned char *) isymbuf)
5915 {
5916 if (! link_info->keep_memory)
5917 free (isymbuf);
5918 else
5919 {
5920 /* Cache the symbols for elf_link_input_bfd. */
5921 symtab_hdr->contents = (unsigned char *) isymbuf;
5922 }
5923 }
5924
5925 if (contents != NULL
5926 && elf_section_data (isec)->this_hdr.contents != contents)
5927 {
5928 if (!changed && !link_info->keep_memory)
5929 free (contents);
5930 else
5931 {
5932 /* Cache the section contents for elf_link_input_bfd. */
5933 elf_section_data (isec)->this_hdr.contents = contents;
5934 }
5935 }
5936
5937 if (elf_section_data (isec)->relocs != internal_relocs)
5938 {
5939 if (!changed)
5940 free (internal_relocs);
5941 else
5942 elf_section_data (isec)->relocs = internal_relocs;
5943 }
5944
5945 *again = changed;
5946 return TRUE;
5947
5948 error_return:
5949 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5950 free (isymbuf);
5951 if (contents != NULL
5952 && elf_section_data (isec)->this_hdr.contents != contents)
5953 free (contents);
5954 if (internal_relocs != NULL
5955 && elf_section_data (isec)->relocs != internal_relocs)
5956 free (internal_relocs);
5957 return FALSE;
5958 }
5959 \f
5960 /* What to do when ld finds relocations against symbols defined in
5961 discarded sections. */
5962
5963 static unsigned int
5964 ppc_elf_action_discarded (asection *sec)
5965 {
5966 if (strcmp (".fixup", sec->name) == 0)
5967 return 0;
5968
5969 if (strcmp (".got2", sec->name) == 0)
5970 return 0;
5971
5972 return _bfd_elf_default_action_discarded (sec);
5973 }
5974 \f
5975 /* Fill in the address for a pointer generated in a linker section. */
5976
5977 static bfd_vma
5978 elf_finish_pointer_linker_section (bfd *input_bfd,
5979 elf_linker_section_t *lsect,
5980 struct elf_link_hash_entry *h,
5981 bfd_vma relocation,
5982 const Elf_Internal_Rela *rel)
5983 {
5984 elf_linker_section_pointers_t *linker_section_ptr;
5985
5986 BFD_ASSERT (lsect != NULL);
5987
5988 if (h != NULL)
5989 {
5990 /* Handle global symbol. */
5991 struct ppc_elf_link_hash_entry *eh;
5992
5993 eh = (struct ppc_elf_link_hash_entry *) h;
5994 BFD_ASSERT (eh->elf.def_regular);
5995 linker_section_ptr = eh->linker_section_pointer;
5996 }
5997 else
5998 {
5999 /* Handle local symbol. */
6000 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6001
6002 BFD_ASSERT (is_ppc_elf (input_bfd));
6003 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6004 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6005 }
6006
6007 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6008 rel->r_addend,
6009 lsect);
6010 BFD_ASSERT (linker_section_ptr != NULL);
6011
6012 /* Offset will always be a multiple of four, so use the bottom bit
6013 as a "written" flag. */
6014 if ((linker_section_ptr->offset & 1) == 0)
6015 {
6016 bfd_put_32 (lsect->section->owner,
6017 relocation + linker_section_ptr->addend,
6018 lsect->section->contents + linker_section_ptr->offset);
6019 linker_section_ptr->offset += 1;
6020 }
6021
6022 relocation = (lsect->section->output_offset
6023 + linker_section_ptr->offset - 1
6024 - 0x8000);
6025
6026 #ifdef DEBUG
6027 fprintf (stderr,
6028 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6029 lsect->name, (long) relocation, (long) relocation);
6030 #endif
6031
6032 /* Subtract out the addend, because it will get added back in by the normal
6033 processing. */
6034 return relocation - linker_section_ptr->addend;
6035 }
6036
6037 /* The RELOCATE_SECTION function is called by the ELF backend linker
6038 to handle the relocations for a section.
6039
6040 The relocs are always passed as Rela structures; if the section
6041 actually uses Rel structures, the r_addend field will always be
6042 zero.
6043
6044 This function is responsible for adjust the section contents as
6045 necessary, and (if using Rela relocs and generating a
6046 relocatable output file) adjusting the reloc addend as
6047 necessary.
6048
6049 This function does not have to worry about setting the reloc
6050 address or the reloc symbol index.
6051
6052 LOCAL_SYMS is a pointer to the swapped in local symbols.
6053
6054 LOCAL_SECTIONS is an array giving the section in the input file
6055 corresponding to the st_shndx field of each local symbol.
6056
6057 The global hash table entry for the global symbols can be found
6058 via elf_sym_hashes (input_bfd).
6059
6060 When generating relocatable output, this function must handle
6061 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6062 going to be the section symbol corresponding to the output
6063 section, which means that the addend must be adjusted
6064 accordingly. */
6065
6066 static bfd_boolean
6067 ppc_elf_relocate_section (bfd *output_bfd,
6068 struct bfd_link_info *info,
6069 bfd *input_bfd,
6070 asection *input_section,
6071 bfd_byte *contents,
6072 Elf_Internal_Rela *relocs,
6073 Elf_Internal_Sym *local_syms,
6074 asection **local_sections)
6075 {
6076 Elf_Internal_Shdr *symtab_hdr;
6077 struct elf_link_hash_entry **sym_hashes;
6078 struct ppc_elf_link_hash_table *htab;
6079 Elf_Internal_Rela *rel;
6080 Elf_Internal_Rela *relend;
6081 Elf_Internal_Rela outrel;
6082 bfd_byte *loc;
6083 asection *got2, *sreloc = NULL;
6084 bfd_vma *local_got_offsets;
6085 bfd_boolean ret = TRUE;
6086 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6087 bfd_boolean is_vxworks_tls;
6088
6089 #ifdef DEBUG
6090 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6091 "%ld relocations%s",
6092 input_bfd, input_section,
6093 (long) input_section->reloc_count,
6094 (info->relocatable) ? " (relocatable)" : "");
6095 #endif
6096
6097 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6098
6099 /* Initialize howto table if not already done. */
6100 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6101 ppc_elf_howto_init ();
6102
6103 htab = ppc_elf_hash_table (info);
6104 local_got_offsets = elf_local_got_offsets (input_bfd);
6105 symtab_hdr = &elf_symtab_hdr (input_bfd);
6106 sym_hashes = elf_sym_hashes (input_bfd);
6107 /* We have to handle relocations in vxworks .tls_vars sections
6108 specially, because the dynamic loader is 'weird'. */
6109 is_vxworks_tls = (htab->is_vxworks && info->shared
6110 && !strcmp (input_section->output_section->name,
6111 ".tls_vars"));
6112 rel = relocs;
6113 relend = relocs + input_section->reloc_count;
6114 for (; rel < relend; rel++)
6115 {
6116 enum elf_ppc_reloc_type r_type;
6117 bfd_vma addend;
6118 bfd_reloc_status_type r;
6119 Elf_Internal_Sym *sym;
6120 asection *sec;
6121 struct elf_link_hash_entry *h;
6122 const char *sym_name;
6123 reloc_howto_type *howto;
6124 unsigned long r_symndx;
6125 bfd_vma relocation;
6126 bfd_vma branch_bit, insn, from;
6127 bfd_boolean unresolved_reloc;
6128 bfd_boolean warned;
6129 unsigned int tls_type, tls_mask, tls_gd;
6130
6131 r_type = ELF32_R_TYPE (rel->r_info);
6132 sym = NULL;
6133 sec = NULL;
6134 h = NULL;
6135 unresolved_reloc = FALSE;
6136 warned = FALSE;
6137 r_symndx = ELF32_R_SYM (rel->r_info);
6138
6139 if (r_symndx < symtab_hdr->sh_info)
6140 {
6141 sym = local_syms + r_symndx;
6142 sec = local_sections[r_symndx];
6143 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6144
6145 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6146 }
6147 else
6148 {
6149 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6150 r_symndx, symtab_hdr, sym_hashes,
6151 h, sec, relocation,
6152 unresolved_reloc, warned);
6153
6154 sym_name = h->root.root.string;
6155 }
6156
6157 if (sec != NULL && elf_discarded_section (sec))
6158 {
6159 /* For relocs against symbols from removed linkonce sections,
6160 or sections discarded by a linker script, we just want the
6161 section contents zeroed. Avoid any special processing. */
6162 howto = NULL;
6163 if (r_type < R_PPC_max)
6164 howto = ppc_elf_howto_table[r_type];
6165 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6166 rel->r_info = 0;
6167 rel->r_addend = 0;
6168 continue;
6169 }
6170
6171 if (info->relocatable)
6172 {
6173 if (got2 != NULL
6174 && r_type == R_PPC_PLTREL24
6175 && rel->r_addend >= 32768)
6176 {
6177 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6178 addend specifies the GOT pointer offset within .got2. */
6179 rel->r_addend += got2->output_offset;
6180 }
6181 continue;
6182 }
6183
6184 /* TLS optimizations. Replace instruction sequences and relocs
6185 based on information we collected in tls_optimize. We edit
6186 RELOCS so that --emit-relocs will output something sensible
6187 for the final instruction stream. */
6188 tls_mask = 0;
6189 tls_gd = 0;
6190 if (IS_PPC_TLS_RELOC (r_type))
6191 {
6192 if (h != NULL)
6193 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6194 else if (local_got_offsets != NULL)
6195 {
6196 char *lgot_masks;
6197 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
6198 tls_mask = lgot_masks[r_symndx];
6199 }
6200 }
6201
6202 /* Ensure reloc mapping code below stays sane. */
6203 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6204 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6205 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6206 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6207 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6208 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6209 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6210 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6211 abort ();
6212 switch (r_type)
6213 {
6214 default:
6215 break;
6216
6217 case R_PPC_GOT_TPREL16:
6218 case R_PPC_GOT_TPREL16_LO:
6219 if (tls_mask != 0
6220 && (tls_mask & TLS_TPREL) == 0)
6221 {
6222 bfd_vma insn;
6223 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6224 insn &= 31 << 21;
6225 insn |= 0x3c020000; /* addis 0,2,0 */
6226 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6227 r_type = R_PPC_TPREL16_HA;
6228 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6229 }
6230 break;
6231
6232 case R_PPC_TLS:
6233 if (tls_mask != 0
6234 && (tls_mask & TLS_TPREL) == 0)
6235 {
6236 bfd_vma insn, rtra;
6237 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6238 if ((insn & ((31 << 26) | (31 << 11)))
6239 == ((31 << 26) | (2 << 11)))
6240 rtra = insn & ((1 << 26) - (1 << 16));
6241 else if ((insn & ((31 << 26) | (31 << 16)))
6242 == ((31 << 26) | (2 << 16)))
6243 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6244 else
6245 abort ();
6246 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6247 /* add -> addi. */
6248 insn = 14 << 26;
6249 else if ((insn & (31 << 1)) == 23 << 1
6250 && ((insn & (31 << 6)) < 14 << 6
6251 || ((insn & (31 << 6)) >= 16 << 6
6252 && (insn & (31 << 6)) < 24 << 6)))
6253 /* load and store indexed -> dform. */
6254 insn = (32 | ((insn >> 6) & 31)) << 26;
6255 else if ((insn & (31 << 1)) == 21 << 1
6256 && (insn & (0x1a << 6)) == 0)
6257 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6258 insn = (((58 | ((insn >> 6) & 4)) << 26)
6259 | ((insn >> 6) & 1));
6260 else if ((insn & (31 << 1)) == 21 << 1
6261 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6262 /* lwax -> lwa. */
6263 insn = (58 << 26) | 2;
6264 else
6265 abort ();
6266 insn |= rtra;
6267 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6268 r_type = R_PPC_TPREL16_LO;
6269 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6270
6271 /* Was PPC_TLS which sits on insn boundary, now
6272 PPC_TPREL16_LO which is at low-order half-word. */
6273 rel->r_offset += d_offset;
6274 }
6275 break;
6276
6277 case R_PPC_GOT_TLSGD16_HI:
6278 case R_PPC_GOT_TLSGD16_HA:
6279 tls_gd = TLS_TPRELGD;
6280 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6281 goto tls_gdld_hi;
6282 break;
6283
6284 case R_PPC_GOT_TLSLD16_HI:
6285 case R_PPC_GOT_TLSLD16_HA:
6286 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6287 {
6288 tls_gdld_hi:
6289 if ((tls_mask & tls_gd) != 0)
6290 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6291 + R_PPC_GOT_TPREL16);
6292 else
6293 {
6294 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6295 rel->r_offset -= d_offset;
6296 r_type = R_PPC_NONE;
6297 }
6298 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6299 }
6300 break;
6301
6302 case R_PPC_GOT_TLSGD16:
6303 case R_PPC_GOT_TLSGD16_LO:
6304 tls_gd = TLS_TPRELGD;
6305 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6306 goto tls_ldgd_opt;
6307 break;
6308
6309 case R_PPC_GOT_TLSLD16:
6310 case R_PPC_GOT_TLSLD16_LO:
6311 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6312 {
6313 bfd_vma insn1, insn2;
6314 bfd_vma offset;
6315
6316 tls_ldgd_opt:
6317 offset = rel[1].r_offset;
6318 insn1 = bfd_get_32 (output_bfd,
6319 contents + rel->r_offset - d_offset);
6320 if ((tls_mask & tls_gd) != 0)
6321 {
6322 /* IE */
6323 insn1 &= (1 << 26) - 1;
6324 insn1 |= 32 << 26; /* lwz */
6325 insn2 = 0x7c631214; /* add 3,3,2 */
6326 rel[1].r_info
6327 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6328 rel[1].r_addend = 0;
6329 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6330 + R_PPC_GOT_TPREL16);
6331 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6332 }
6333 else
6334 {
6335 /* LE */
6336 insn1 = 0x3c620000; /* addis 3,2,0 */
6337 insn2 = 0x38630000; /* addi 3,3,0 */
6338 if (tls_gd == 0)
6339 {
6340 /* Was an LD reloc. */
6341 for (r_symndx = 0;
6342 r_symndx < symtab_hdr->sh_info;
6343 r_symndx++)
6344 if (local_sections[r_symndx] == sec)
6345 break;
6346 if (r_symndx >= symtab_hdr->sh_info)
6347 r_symndx = 0;
6348 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6349 if (r_symndx != 0)
6350 rel->r_addend -= (local_syms[r_symndx].st_value
6351 + sec->output_offset
6352 + sec->output_section->vma);
6353 }
6354 r_type = R_PPC_TPREL16_HA;
6355 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6356 rel[1].r_info = ELF32_R_INFO (r_symndx,
6357 R_PPC_TPREL16_LO);
6358 rel[1].r_offset += d_offset;
6359 rel[1].r_addend = rel->r_addend;
6360 }
6361 bfd_put_32 (output_bfd, insn1,
6362 contents + rel->r_offset - d_offset);
6363 bfd_put_32 (output_bfd, insn2, contents + offset);
6364 if (tls_gd == 0)
6365 {
6366 /* We changed the symbol on an LD reloc. Start over
6367 in order to get h, sym, sec etc. right. */
6368 rel--;
6369 continue;
6370 }
6371 }
6372 break;
6373 }
6374
6375 /* Handle other relocations that tweak non-addend part of insn. */
6376 branch_bit = 0;
6377 switch (r_type)
6378 {
6379 default:
6380 break;
6381
6382 /* Branch taken prediction relocations. */
6383 case R_PPC_ADDR14_BRTAKEN:
6384 case R_PPC_REL14_BRTAKEN:
6385 branch_bit = BRANCH_PREDICT_BIT;
6386 /* Fall thru */
6387
6388 /* Branch not taken prediction relocations. */
6389 case R_PPC_ADDR14_BRNTAKEN:
6390 case R_PPC_REL14_BRNTAKEN:
6391 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6392 insn &= ~BRANCH_PREDICT_BIT;
6393 insn |= branch_bit;
6394
6395 from = (rel->r_offset
6396 + input_section->output_offset
6397 + input_section->output_section->vma);
6398
6399 /* Invert 'y' bit if not the default. */
6400 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6401 insn ^= BRANCH_PREDICT_BIT;
6402
6403 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6404 break;
6405 }
6406
6407 addend = rel->r_addend;
6408 tls_type = 0;
6409 howto = NULL;
6410 if (r_type < R_PPC_max)
6411 howto = ppc_elf_howto_table[r_type];
6412 switch (r_type)
6413 {
6414 default:
6415 (*_bfd_error_handler)
6416 (_("%B: unknown relocation type %d for symbol %s"),
6417 input_bfd, (int) r_type, sym_name);
6418
6419 bfd_set_error (bfd_error_bad_value);
6420 ret = FALSE;
6421 continue;
6422
6423 case R_PPC_NONE:
6424 case R_PPC_TLS:
6425 case R_PPC_EMB_MRKREF:
6426 case R_PPC_GNU_VTINHERIT:
6427 case R_PPC_GNU_VTENTRY:
6428 continue;
6429
6430 /* GOT16 relocations. Like an ADDR16 using the symbol's
6431 address in the GOT as relocation value instead of the
6432 symbol's value itself. Also, create a GOT entry for the
6433 symbol and put the symbol value there. */
6434 case R_PPC_GOT_TLSGD16:
6435 case R_PPC_GOT_TLSGD16_LO:
6436 case R_PPC_GOT_TLSGD16_HI:
6437 case R_PPC_GOT_TLSGD16_HA:
6438 tls_type = TLS_TLS | TLS_GD;
6439 goto dogot;
6440
6441 case R_PPC_GOT_TLSLD16:
6442 case R_PPC_GOT_TLSLD16_LO:
6443 case R_PPC_GOT_TLSLD16_HI:
6444 case R_PPC_GOT_TLSLD16_HA:
6445 tls_type = TLS_TLS | TLS_LD;
6446 goto dogot;
6447
6448 case R_PPC_GOT_TPREL16:
6449 case R_PPC_GOT_TPREL16_LO:
6450 case R_PPC_GOT_TPREL16_HI:
6451 case R_PPC_GOT_TPREL16_HA:
6452 tls_type = TLS_TLS | TLS_TPREL;
6453 goto dogot;
6454
6455 case R_PPC_GOT_DTPREL16:
6456 case R_PPC_GOT_DTPREL16_LO:
6457 case R_PPC_GOT_DTPREL16_HI:
6458 case R_PPC_GOT_DTPREL16_HA:
6459 tls_type = TLS_TLS | TLS_DTPREL;
6460 goto dogot;
6461
6462 case R_PPC_GOT16:
6463 case R_PPC_GOT16_LO:
6464 case R_PPC_GOT16_HI:
6465 case R_PPC_GOT16_HA:
6466 dogot:
6467 {
6468 /* Relocation is to the entry for this symbol in the global
6469 offset table. */
6470 bfd_vma off;
6471 bfd_vma *offp;
6472 unsigned long indx;
6473
6474 if (htab->got == NULL)
6475 abort ();
6476
6477 indx = 0;
6478 if (tls_type == (TLS_TLS | TLS_LD)
6479 && (h == NULL
6480 || !h->def_dynamic))
6481 offp = &htab->tlsld_got.offset;
6482 else if (h != NULL)
6483 {
6484 bfd_boolean dyn;
6485 dyn = htab->elf.dynamic_sections_created;
6486 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6487 || (info->shared
6488 && SYMBOL_REFERENCES_LOCAL (info, h)))
6489 /* This is actually a static link, or it is a
6490 -Bsymbolic link and the symbol is defined
6491 locally, or the symbol was forced to be local
6492 because of a version file. */
6493 ;
6494 else
6495 {
6496 indx = h->dynindx;
6497 unresolved_reloc = FALSE;
6498 }
6499 offp = &h->got.offset;
6500 }
6501 else
6502 {
6503 if (local_got_offsets == NULL)
6504 abort ();
6505 offp = &local_got_offsets[r_symndx];
6506 }
6507
6508 /* The offset must always be a multiple of 4. We use the
6509 least significant bit to record whether we have already
6510 processed this entry. */
6511 off = *offp;
6512 if ((off & 1) != 0)
6513 off &= ~1;
6514 else
6515 {
6516 unsigned int tls_m = (tls_mask
6517 & (TLS_LD | TLS_GD | TLS_DTPREL
6518 | TLS_TPREL | TLS_TPRELGD));
6519
6520 if (offp == &htab->tlsld_got.offset)
6521 tls_m = TLS_LD;
6522 else if (h == NULL
6523 || !h->def_dynamic)
6524 tls_m &= ~TLS_LD;
6525
6526 /* We might have multiple got entries for this sym.
6527 Initialize them all. */
6528 do
6529 {
6530 int tls_ty = 0;
6531
6532 if ((tls_m & TLS_LD) != 0)
6533 {
6534 tls_ty = TLS_TLS | TLS_LD;
6535 tls_m &= ~TLS_LD;
6536 }
6537 else if ((tls_m & TLS_GD) != 0)
6538 {
6539 tls_ty = TLS_TLS | TLS_GD;
6540 tls_m &= ~TLS_GD;
6541 }
6542 else if ((tls_m & TLS_DTPREL) != 0)
6543 {
6544 tls_ty = TLS_TLS | TLS_DTPREL;
6545 tls_m &= ~TLS_DTPREL;
6546 }
6547 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6548 {
6549 tls_ty = TLS_TLS | TLS_TPREL;
6550 tls_m = 0;
6551 }
6552
6553 /* Generate relocs for the dynamic linker. */
6554 if ((info->shared || indx != 0)
6555 && (h == NULL
6556 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6557 || h->root.type != bfd_link_hash_undefweak))
6558 {
6559 outrel.r_offset = (htab->got->output_section->vma
6560 + htab->got->output_offset
6561 + off);
6562 outrel.r_addend = 0;
6563 if (tls_ty & (TLS_LD | TLS_GD))
6564 {
6565 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6566 if (tls_ty == (TLS_TLS | TLS_GD))
6567 {
6568 loc = htab->relgot->contents;
6569 loc += (htab->relgot->reloc_count++
6570 * sizeof (Elf32_External_Rela));
6571 bfd_elf32_swap_reloca_out (output_bfd,
6572 &outrel, loc);
6573 outrel.r_offset += 4;
6574 outrel.r_info
6575 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6576 }
6577 }
6578 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6579 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6580 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6581 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6582 else if (indx == 0)
6583 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6584 else
6585 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6586 if (indx == 0)
6587 {
6588 outrel.r_addend += relocation;
6589 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6590 outrel.r_addend -= htab->elf.tls_sec->vma;
6591 }
6592 loc = htab->relgot->contents;
6593 loc += (htab->relgot->reloc_count++
6594 * sizeof (Elf32_External_Rela));
6595 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6596 }
6597
6598 /* Init the .got section contents if we're not
6599 emitting a reloc. */
6600 else
6601 {
6602 bfd_vma value = relocation;
6603
6604 if (tls_ty == (TLS_TLS | TLS_LD))
6605 value = 1;
6606 else if (tls_ty != 0)
6607 {
6608 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6609 if (tls_ty == (TLS_TLS | TLS_TPREL))
6610 value += DTP_OFFSET - TP_OFFSET;
6611
6612 if (tls_ty == (TLS_TLS | TLS_GD))
6613 {
6614 bfd_put_32 (output_bfd, value,
6615 htab->got->contents + off + 4);
6616 value = 1;
6617 }
6618 }
6619 bfd_put_32 (output_bfd, value,
6620 htab->got->contents + off);
6621 }
6622
6623 off += 4;
6624 if (tls_ty & (TLS_LD | TLS_GD))
6625 off += 4;
6626 }
6627 while (tls_m != 0);
6628
6629 off = *offp;
6630 *offp = off | 1;
6631 }
6632
6633 if (off >= (bfd_vma) -2)
6634 abort ();
6635
6636 if ((tls_type & TLS_TLS) != 0)
6637 {
6638 if (tls_type != (TLS_TLS | TLS_LD))
6639 {
6640 if ((tls_mask & TLS_LD) != 0
6641 && !(h == NULL
6642 || !h->def_dynamic))
6643 off += 8;
6644 if (tls_type != (TLS_TLS | TLS_GD))
6645 {
6646 if ((tls_mask & TLS_GD) != 0)
6647 off += 8;
6648 if (tls_type != (TLS_TLS | TLS_DTPREL))
6649 {
6650 if ((tls_mask & TLS_DTPREL) != 0)
6651 off += 4;
6652 }
6653 }
6654 }
6655 }
6656
6657 relocation = htab->got->output_offset + off;
6658 relocation -= htab->elf.hgot->root.u.def.value;
6659
6660 /* Addends on got relocations don't make much sense.
6661 x+off@got is actually x@got+off, and since the got is
6662 generated by a hash table traversal, the value in the
6663 got at entry m+n bears little relation to the entry m. */
6664 if (addend != 0)
6665 (*_bfd_error_handler)
6666 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6667 input_bfd,
6668 input_section,
6669 (long) rel->r_offset,
6670 howto->name,
6671 sym_name);
6672 }
6673 break;
6674
6675 /* Relocations that need no special processing. */
6676 case R_PPC_LOCAL24PC:
6677 /* It makes no sense to point a local relocation
6678 at a symbol not in this object. */
6679 if (unresolved_reloc)
6680 {
6681 if (! (*info->callbacks->undefined_symbol) (info,
6682 h->root.root.string,
6683 input_bfd,
6684 input_section,
6685 rel->r_offset,
6686 TRUE))
6687 return FALSE;
6688 continue;
6689 }
6690 break;
6691
6692 case R_PPC_DTPREL16:
6693 case R_PPC_DTPREL16_LO:
6694 case R_PPC_DTPREL16_HI:
6695 case R_PPC_DTPREL16_HA:
6696 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6697 break;
6698
6699 /* Relocations that may need to be propagated if this is a shared
6700 object. */
6701 case R_PPC_TPREL16:
6702 case R_PPC_TPREL16_LO:
6703 case R_PPC_TPREL16_HI:
6704 case R_PPC_TPREL16_HA:
6705 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6706 /* The TPREL16 relocs shouldn't really be used in shared
6707 libs as they will result in DT_TEXTREL being set, but
6708 support them anyway. */
6709 goto dodyn;
6710
6711 case R_PPC_TPREL32:
6712 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6713 goto dodyn;
6714
6715 case R_PPC_DTPREL32:
6716 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6717 goto dodyn;
6718
6719 case R_PPC_DTPMOD32:
6720 relocation = 1;
6721 addend = 0;
6722 goto dodyn;
6723
6724 case R_PPC_REL16:
6725 case R_PPC_REL16_LO:
6726 case R_PPC_REL16_HI:
6727 case R_PPC_REL16_HA:
6728 break;
6729
6730 case R_PPC_REL32:
6731 if (h == NULL || h == htab->elf.hgot)
6732 break;
6733 /* fall through */
6734
6735 case R_PPC_ADDR32:
6736 case R_PPC_ADDR16:
6737 case R_PPC_ADDR16_LO:
6738 case R_PPC_ADDR16_HI:
6739 case R_PPC_ADDR16_HA:
6740 case R_PPC_UADDR32:
6741 case R_PPC_UADDR16:
6742 goto dodyn;
6743
6744 case R_PPC_REL24:
6745 case R_PPC_REL14:
6746 case R_PPC_REL14_BRTAKEN:
6747 case R_PPC_REL14_BRNTAKEN:
6748 /* If these relocations are not to a named symbol, they can be
6749 handled right here, no need to bother the dynamic linker. */
6750 if (SYMBOL_CALLS_LOCAL (info, h)
6751 || h == htab->elf.hgot)
6752 break;
6753 /* fall through */
6754
6755 case R_PPC_ADDR24:
6756 case R_PPC_ADDR14:
6757 case R_PPC_ADDR14_BRTAKEN:
6758 case R_PPC_ADDR14_BRNTAKEN:
6759 if (h != NULL && !info->shared)
6760 break;
6761 /* fall through */
6762
6763 dodyn:
6764 if ((input_section->flags & SEC_ALLOC) == 0
6765 || is_vxworks_tls)
6766 break;
6767
6768 if ((info->shared
6769 && !(h != NULL
6770 && ((h->root.type == bfd_link_hash_undefined
6771 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6772 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6773 || (h->root.type == bfd_link_hash_undefweak
6774 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
6775 && (must_be_dyn_reloc (info, r_type)
6776 || !SYMBOL_CALLS_LOCAL (info, h)))
6777 || (ELIMINATE_COPY_RELOCS
6778 && !info->shared
6779 && h != NULL
6780 && h->dynindx != -1
6781 && !h->non_got_ref
6782 && !h->def_regular))
6783 {
6784 int skip;
6785
6786 #ifdef DEBUG
6787 fprintf (stderr, "ppc_elf_relocate_section needs to "
6788 "create relocation for %s\n",
6789 (h && h->root.root.string
6790 ? h->root.root.string : "<unknown>"));
6791 #endif
6792
6793 /* When generating a shared object, these relocations
6794 are copied into the output file to be resolved at run
6795 time. */
6796 if (sreloc == NULL)
6797 {
6798 const char *name;
6799
6800 name = (bfd_elf_string_from_elf_section
6801 (input_bfd,
6802 elf_elfheader (input_bfd)->e_shstrndx,
6803 elf_section_data (input_section)->rel_hdr.sh_name));
6804 if (name == NULL)
6805 return FALSE;
6806
6807 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6808 && strcmp (bfd_get_section_name (input_bfd,
6809 input_section),
6810 name + 5) == 0);
6811
6812 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6813 BFD_ASSERT (sreloc != NULL);
6814 }
6815
6816 skip = 0;
6817 outrel.r_offset =
6818 _bfd_elf_section_offset (output_bfd, info, input_section,
6819 rel->r_offset);
6820 if (outrel.r_offset == (bfd_vma) -1
6821 || outrel.r_offset == (bfd_vma) -2)
6822 skip = (int) outrel.r_offset;
6823 outrel.r_offset += (input_section->output_section->vma
6824 + input_section->output_offset);
6825
6826 if (skip)
6827 memset (&outrel, 0, sizeof outrel);
6828 else if ((h != NULL
6829 && (h->root.type == bfd_link_hash_undefined
6830 || h->root.type == bfd_link_hash_undefweak))
6831 || !SYMBOL_REFERENCES_LOCAL (info, h))
6832 {
6833 unresolved_reloc = FALSE;
6834 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6835 outrel.r_addend = rel->r_addend;
6836 }
6837 else
6838 {
6839 outrel.r_addend = relocation + rel->r_addend;
6840
6841 if (r_type == R_PPC_ADDR32)
6842 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6843 else
6844 {
6845 long indx = 0;
6846
6847 if (r_symndx == 0 || bfd_is_abs_section (sec))
6848 ;
6849 else if (sec == NULL || sec->owner == NULL)
6850 {
6851 bfd_set_error (bfd_error_bad_value);
6852 ret = FALSE;
6853 }
6854 else
6855 {
6856 asection *osec;
6857
6858 /* We are turning this relocation into one
6859 against a section symbol. It would be
6860 proper to subtract the symbol's value,
6861 osec->vma, from the emitted reloc addend,
6862 but ld.so expects buggy relocs. */
6863 osec = sec->output_section;
6864 indx = elf_section_data (osec)->dynindx;
6865 if (indx == 0)
6866 {
6867 osec = htab->elf.text_index_section;
6868 indx = elf_section_data (osec)->dynindx;
6869 }
6870 BFD_ASSERT (indx != 0);
6871 #ifdef DEBUG
6872 if (indx == 0)
6873 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6874 indx, osec->name, osec->flags,
6875 h->root.root.string);
6876 #endif
6877 }
6878
6879 outrel.r_info = ELF32_R_INFO (indx, r_type);
6880 }
6881 }
6882
6883 loc = sreloc->contents;
6884 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6885 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6886
6887 if (skip == -1)
6888 continue;
6889
6890 /* This reloc will be computed at runtime. We clear the memory
6891 so that it contains predictable value. */
6892 if (! skip
6893 && ((input_section->flags & SEC_ALLOC) != 0
6894 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6895 {
6896 relocation = howto->pc_relative ? outrel.r_offset : 0;
6897 addend = 0;
6898 break;
6899 }
6900 }
6901 break;
6902
6903 case R_PPC_RELAX32PC_PLT:
6904 case R_PPC_RELAX32_PLT:
6905 {
6906 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6907
6908 if (htab->plt_type == PLT_NEW)
6909 relocation = (htab->glink->output_section->vma
6910 + htab->glink->output_offset
6911 + ent->glink_offset);
6912 else
6913 relocation = (htab->plt->output_section->vma
6914 + htab->plt->output_offset
6915 + ent->plt.offset);
6916 }
6917 if (r_type == R_PPC_RELAX32_PLT)
6918 goto relax32;
6919 /* Fall thru */
6920
6921 case R_PPC_RELAX32PC:
6922 relocation -= (input_section->output_section->vma
6923 + input_section->output_offset
6924 + rel->r_offset - 4);
6925 /* Fall thru */
6926
6927 case R_PPC_RELAX32:
6928 relax32:
6929 {
6930 unsigned long t0;
6931 unsigned long t1;
6932
6933 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6934 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6935
6936 /* We're clearing the bits for R_PPC_ADDR16_HA
6937 and R_PPC_ADDR16_LO here. */
6938 t0 &= ~0xffff;
6939 t1 &= ~0xffff;
6940
6941 /* t0 is HA, t1 is LO */
6942 relocation += addend;
6943 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6944 t1 |= relocation & 0xffff;
6945
6946 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6947 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6948 }
6949 continue;
6950
6951 /* Indirect .sdata relocation. */
6952 case R_PPC_EMB_SDAI16:
6953 BFD_ASSERT (htab->sdata[0].section != NULL);
6954 relocation
6955 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6956 h, relocation, rel);
6957 break;
6958
6959 /* Indirect .sdata2 relocation. */
6960 case R_PPC_EMB_SDA2I16:
6961 BFD_ASSERT (htab->sdata[1].section != NULL);
6962 relocation
6963 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6964 h, relocation, rel);
6965 break;
6966
6967 /* Handle the TOC16 reloc. We want to use the offset within the .got
6968 section, not the actual VMA. This is appropriate when generating
6969 an embedded ELF object, for which the .got section acts like the
6970 AIX .toc section. */
6971 case R_PPC_TOC16: /* phony GOT16 relocations */
6972 BFD_ASSERT (sec != NULL);
6973 BFD_ASSERT (bfd_is_und_section (sec)
6974 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6975 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6976
6977 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6978 break;
6979
6980 case R_PPC_PLTREL24:
6981 /* Relocation is to the entry for this symbol in the
6982 procedure linkage table. */
6983 {
6984 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6985
6986 addend = 0;
6987 if (ent == NULL
6988 || htab->plt == NULL)
6989 {
6990 /* We didn't make a PLT entry for this symbol. This
6991 happens when statically linking PIC code, or when
6992 using -Bsymbolic. */
6993 break;
6994 }
6995
6996 unresolved_reloc = FALSE;
6997 if (htab->plt_type == PLT_NEW)
6998 relocation = (htab->glink->output_section->vma
6999 + htab->glink->output_offset
7000 + ent->glink_offset);
7001 else
7002 relocation = (htab->plt->output_section->vma
7003 + htab->plt->output_offset
7004 + ent->plt.offset);
7005 }
7006 break;
7007
7008 /* Relocate against _SDA_BASE_. */
7009 case R_PPC_SDAREL16:
7010 {
7011 const char *name;
7012 struct elf_link_hash_entry *sh;
7013
7014 BFD_ASSERT (sec != NULL);
7015 name = bfd_get_section_name (abfd, sec->output_section);
7016 if (! ((CONST_STRNEQ (name, ".sdata")
7017 && (name[6] == 0 || name[6] == '.'))
7018 || (CONST_STRNEQ (name, ".sbss")
7019 && (name[5] == 0 || name[5] == '.'))))
7020 {
7021 (*_bfd_error_handler)
7022 (_("%B: the target (%s) of a %s relocation is "
7023 "in the wrong output section (%s)"),
7024 input_bfd,
7025 sym_name,
7026 howto->name,
7027 name);
7028 }
7029 sh = htab->sdata[0].sym;
7030 addend -= (sh->root.u.def.value
7031 + sh->root.u.def.section->output_offset
7032 + sh->root.u.def.section->output_section->vma);
7033 }
7034 break;
7035
7036 /* Relocate against _SDA2_BASE_. */
7037 case R_PPC_EMB_SDA2REL:
7038 {
7039 const char *name;
7040 struct elf_link_hash_entry *sh;
7041
7042 BFD_ASSERT (sec != NULL);
7043 name = bfd_get_section_name (abfd, sec->output_section);
7044 if (! (CONST_STRNEQ (name, ".sdata2")
7045 || CONST_STRNEQ (name, ".sbss2")))
7046 {
7047 (*_bfd_error_handler)
7048 (_("%B: the target (%s) of a %s relocation is "
7049 "in the wrong output section (%s)"),
7050 input_bfd,
7051 sym_name,
7052 howto->name,
7053 name);
7054
7055 bfd_set_error (bfd_error_bad_value);
7056 ret = FALSE;
7057 continue;
7058 }
7059 sh = htab->sdata[1].sym;
7060 addend -= (sh->root.u.def.value
7061 + sh->root.u.def.section->output_offset
7062 + sh->root.u.def.section->output_section->vma);
7063 }
7064 break;
7065
7066 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7067 case R_PPC_EMB_SDA21:
7068 case R_PPC_EMB_RELSDA:
7069 {
7070 const char *name;
7071 int reg;
7072 struct elf_link_hash_entry *sh;
7073
7074 BFD_ASSERT (sec != NULL);
7075 name = bfd_get_section_name (abfd, sec->output_section);
7076 if (((CONST_STRNEQ (name, ".sdata")
7077 && (name[6] == 0 || name[6] == '.'))
7078 || (CONST_STRNEQ (name, ".sbss")
7079 && (name[5] == 0 || name[5] == '.'))))
7080 {
7081 reg = 13;
7082 sh = htab->sdata[0].sym;
7083 addend -= (sh->root.u.def.value
7084 + sh->root.u.def.section->output_offset
7085 + sh->root.u.def.section->output_section->vma);
7086 }
7087
7088 else if (CONST_STRNEQ (name, ".sdata2")
7089 || CONST_STRNEQ (name, ".sbss2"))
7090 {
7091 reg = 2;
7092 sh = htab->sdata[1].sym;
7093 addend -= (sh->root.u.def.value
7094 + sh->root.u.def.section->output_offset
7095 + sh->root.u.def.section->output_section->vma);
7096 }
7097
7098 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7099 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7100 {
7101 reg = 0;
7102 }
7103
7104 else
7105 {
7106 (*_bfd_error_handler)
7107 (_("%B: the target (%s) of a %s relocation is "
7108 "in the wrong output section (%s)"),
7109 input_bfd,
7110 sym_name,
7111 howto->name,
7112 name);
7113
7114 bfd_set_error (bfd_error_bad_value);
7115 ret = FALSE;
7116 continue;
7117 }
7118
7119 if (r_type == R_PPC_EMB_SDA21)
7120 { /* fill in register field */
7121 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7122 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7123 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7124 }
7125 }
7126 break;
7127
7128 /* Relocate against the beginning of the section. */
7129 case R_PPC_SECTOFF:
7130 case R_PPC_SECTOFF_LO:
7131 case R_PPC_SECTOFF_HI:
7132 case R_PPC_SECTOFF_HA:
7133 BFD_ASSERT (sec != NULL);
7134 addend -= sec->output_section->vma;
7135 break;
7136
7137 /* Negative relocations. */
7138 case R_PPC_EMB_NADDR32:
7139 case R_PPC_EMB_NADDR16:
7140 case R_PPC_EMB_NADDR16_LO:
7141 case R_PPC_EMB_NADDR16_HI:
7142 case R_PPC_EMB_NADDR16_HA:
7143 addend -= 2 * relocation;
7144 break;
7145
7146 case R_PPC_COPY:
7147 case R_PPC_GLOB_DAT:
7148 case R_PPC_JMP_SLOT:
7149 case R_PPC_RELATIVE:
7150 case R_PPC_PLT32:
7151 case R_PPC_PLTREL32:
7152 case R_PPC_PLT16_LO:
7153 case R_PPC_PLT16_HI:
7154 case R_PPC_PLT16_HA:
7155 case R_PPC_ADDR30:
7156 case R_PPC_EMB_RELSEC16:
7157 case R_PPC_EMB_RELST_LO:
7158 case R_PPC_EMB_RELST_HI:
7159 case R_PPC_EMB_RELST_HA:
7160 case R_PPC_EMB_BIT_FLD:
7161 (*_bfd_error_handler)
7162 (_("%B: relocation %s is not yet supported for symbol %s."),
7163 input_bfd,
7164 howto->name,
7165 sym_name);
7166
7167 bfd_set_error (bfd_error_invalid_operation);
7168 ret = FALSE;
7169 continue;
7170 }
7171
7172 /* Do any further special processing. */
7173 switch (r_type)
7174 {
7175 default:
7176 break;
7177
7178 case R_PPC_ADDR16_HA:
7179 case R_PPC_REL16_HA:
7180 case R_PPC_SECTOFF_HA:
7181 case R_PPC_TPREL16_HA:
7182 case R_PPC_DTPREL16_HA:
7183 case R_PPC_EMB_NADDR16_HA:
7184 case R_PPC_EMB_RELST_HA:
7185 /* It's just possible that this symbol is a weak symbol
7186 that's not actually defined anywhere. In that case,
7187 'sec' would be NULL, and we should leave the symbol
7188 alone (it will be set to zero elsewhere in the link). */
7189 if (sec == NULL)
7190 break;
7191 /* Fall thru */
7192
7193 case R_PPC_PLT16_HA:
7194 case R_PPC_GOT16_HA:
7195 case R_PPC_GOT_TLSGD16_HA:
7196 case R_PPC_GOT_TLSLD16_HA:
7197 case R_PPC_GOT_TPREL16_HA:
7198 case R_PPC_GOT_DTPREL16_HA:
7199 /* Add 0x10000 if sign bit in 0:15 is set.
7200 Bits 0:15 are not used. */
7201 addend += 0x8000;
7202 break;
7203 }
7204
7205 #ifdef DEBUG
7206 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7207 "offset = %ld, addend = %ld\n",
7208 howto->name,
7209 (int) r_type,
7210 sym_name,
7211 r_symndx,
7212 (long) rel->r_offset,
7213 (long) addend);
7214 #endif
7215
7216 if (unresolved_reloc
7217 && !((input_section->flags & SEC_DEBUGGING) != 0
7218 && h->def_dynamic))
7219 {
7220 (*_bfd_error_handler)
7221 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7222 input_bfd,
7223 input_section,
7224 (long) rel->r_offset,
7225 howto->name,
7226 sym_name);
7227 ret = FALSE;
7228 }
7229
7230 r = _bfd_final_link_relocate (howto,
7231 input_bfd,
7232 input_section,
7233 contents,
7234 rel->r_offset,
7235 relocation,
7236 addend);
7237
7238 if (r != bfd_reloc_ok)
7239 {
7240 if (r == bfd_reloc_overflow)
7241 {
7242 if (warned)
7243 continue;
7244 if (h != NULL
7245 && h->root.type == bfd_link_hash_undefweak
7246 && howto->pc_relative)
7247 {
7248 /* Assume this is a call protected by other code that
7249 detect the symbol is undefined. If this is the case,
7250 we can safely ignore the overflow. If not, the
7251 program is hosed anyway, and a little warning isn't
7252 going to help. */
7253
7254 continue;
7255 }
7256
7257 if (! (*info->callbacks->reloc_overflow) (info,
7258 (h ? &h->root : NULL),
7259 sym_name,
7260 howto->name,
7261 rel->r_addend,
7262 input_bfd,
7263 input_section,
7264 rel->r_offset))
7265 return FALSE;
7266 }
7267 else
7268 {
7269 (*_bfd_error_handler)
7270 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
7271 input_bfd, input_section,
7272 (long) rel->r_offset, howto->name, sym_name, (int) r);
7273 ret = FALSE;
7274 }
7275 }
7276 }
7277
7278 #ifdef DEBUG
7279 fprintf (stderr, "\n");
7280 #endif
7281
7282 return ret;
7283 }
7284 \f
7285 #define PPC_LO(v) ((v) & 0xffff)
7286 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7287 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7288
7289 /* Finish up dynamic symbol handling. We set the contents of various
7290 dynamic sections here. */
7291
7292 static bfd_boolean
7293 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7294 struct bfd_link_info *info,
7295 struct elf_link_hash_entry *h,
7296 Elf_Internal_Sym *sym)
7297 {
7298 struct ppc_elf_link_hash_table *htab;
7299 struct plt_entry *ent;
7300 bfd_boolean doneone;
7301
7302 #ifdef DEBUG
7303 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7304 h->root.root.string);
7305 #endif
7306
7307 htab = ppc_elf_hash_table (info);
7308 BFD_ASSERT (htab->elf.dynobj != NULL);
7309
7310 doneone = FALSE;
7311 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7312 if (ent->plt.offset != (bfd_vma) -1)
7313 {
7314 if (!doneone)
7315 {
7316 Elf_Internal_Rela rela;
7317 bfd_byte *loc;
7318 bfd_vma reloc_index;
7319
7320 if (htab->plt_type == PLT_NEW)
7321 reloc_index = ent->plt.offset / 4;
7322 else
7323 {
7324 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7325 / htab->plt_slot_size);
7326 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7327 && htab->plt_type == PLT_OLD)
7328 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7329 }
7330
7331 /* This symbol has an entry in the procedure linkage table.
7332 Set it up. */
7333 if (htab->plt_type == PLT_VXWORKS)
7334 {
7335 bfd_vma got_offset;
7336 const bfd_vma *plt_entry;
7337
7338 /* The first three entries in .got.plt are reserved. */
7339 got_offset = (reloc_index + 3) * 4;
7340
7341 /* Use the right PLT. */
7342 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7343 : ppc_elf_vxworks_plt_entry;
7344
7345 /* Fill in the .plt on VxWorks. */
7346 if (info->shared)
7347 {
7348 bfd_vma got_offset_hi = (got_offset >> 16)
7349 + ((got_offset & 0x8000) >> 15);
7350
7351 bfd_put_32 (output_bfd,
7352 plt_entry[0] | (got_offset_hi & 0xffff),
7353 htab->plt->contents + ent->plt.offset + 0);
7354 bfd_put_32 (output_bfd,
7355 plt_entry[1] | (got_offset & 0xffff),
7356 htab->plt->contents + ent->plt.offset + 4);
7357 }
7358 else
7359 {
7360 bfd_vma got_loc
7361 = (got_offset
7362 + htab->elf.hgot->root.u.def.value
7363 + htab->elf.hgot->root.u.def.section->output_offset
7364 + htab->elf.hgot->root.u.def.section->output_section->vma);
7365 bfd_vma got_loc_hi = (got_loc >> 16)
7366 + ((got_loc & 0x8000) >> 15);
7367
7368 bfd_put_32 (output_bfd,
7369 plt_entry[0] | (got_loc_hi & 0xffff),
7370 htab->plt->contents + ent->plt.offset + 0);
7371 bfd_put_32 (output_bfd,
7372 plt_entry[1] | (got_loc & 0xffff),
7373 htab->plt->contents + ent->plt.offset + 4);
7374 }
7375
7376 bfd_put_32 (output_bfd, plt_entry[2],
7377 htab->plt->contents + ent->plt.offset + 8);
7378 bfd_put_32 (output_bfd, plt_entry[3],
7379 htab->plt->contents + ent->plt.offset + 12);
7380
7381 /* This instruction is an immediate load. The value loaded is
7382 the byte offset of the R_PPC_JMP_SLOT relocation from the
7383 start of the .rela.plt section. The value is stored in the
7384 low-order 16 bits of the load instruction. */
7385 /* NOTE: It appears that this is now an index rather than a
7386 prescaled offset. */
7387 bfd_put_32 (output_bfd,
7388 plt_entry[4] | reloc_index,
7389 htab->plt->contents + ent->plt.offset + 16);
7390 /* This instruction is a PC-relative branch whose target is
7391 the start of the PLT section. The address of this branch
7392 instruction is 20 bytes beyond the start of this PLT entry.
7393 The address is encoded in bits 6-29, inclusive. The value
7394 stored is right-shifted by two bits, permitting a 26-bit
7395 offset. */
7396 bfd_put_32 (output_bfd,
7397 (plt_entry[5]
7398 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7399 htab->plt->contents + ent->plt.offset + 20);
7400 bfd_put_32 (output_bfd, plt_entry[6],
7401 htab->plt->contents + ent->plt.offset + 24);
7402 bfd_put_32 (output_bfd, plt_entry[7],
7403 htab->plt->contents + ent->plt.offset + 28);
7404
7405 /* Fill in the GOT entry corresponding to this PLT slot with
7406 the address immediately after the the "bctr" instruction
7407 in this PLT entry. */
7408 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7409 + htab->plt->output_offset
7410 + ent->plt.offset + 16),
7411 htab->sgotplt->contents + got_offset);
7412
7413 if (!info->shared)
7414 {
7415 /* Fill in a couple of entries in .rela.plt.unloaded. */
7416 loc = htab->srelplt2->contents
7417 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7418 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7419 * sizeof (Elf32_External_Rela));
7420
7421 /* Provide the @ha relocation for the first instruction. */
7422 rela.r_offset = (htab->plt->output_section->vma
7423 + htab->plt->output_offset
7424 + ent->plt.offset + 2);
7425 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7426 R_PPC_ADDR16_HA);
7427 rela.r_addend = got_offset;
7428 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7429 loc += sizeof (Elf32_External_Rela);
7430
7431 /* Provide the @l relocation for the second instruction. */
7432 rela.r_offset = (htab->plt->output_section->vma
7433 + htab->plt->output_offset
7434 + ent->plt.offset + 6);
7435 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7436 R_PPC_ADDR16_LO);
7437 rela.r_addend = got_offset;
7438 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7439 loc += sizeof (Elf32_External_Rela);
7440
7441 /* Provide a relocation for the GOT entry corresponding to this
7442 PLT slot. Point it at the middle of the .plt entry. */
7443 rela.r_offset = (htab->sgotplt->output_section->vma
7444 + htab->sgotplt->output_offset
7445 + got_offset);
7446 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7447 R_PPC_ADDR32);
7448 rela.r_addend = ent->plt.offset + 16;
7449 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7450 }
7451
7452 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7453 In particular, the offset for the relocation is not the
7454 address of the PLT entry for this function, as specified
7455 by the ABI. Instead, the offset is set to the address of
7456 the GOT slot for this function. See EABI 4.4.4.1. */
7457 rela.r_offset = (htab->sgotplt->output_section->vma
7458 + htab->sgotplt->output_offset
7459 + got_offset);
7460
7461 }
7462 else
7463 {
7464 rela.r_offset = (htab->plt->output_section->vma
7465 + htab->plt->output_offset
7466 + ent->plt.offset);
7467 if (htab->plt_type == PLT_OLD)
7468 {
7469 /* We don't need to fill in the .plt. The ppc dynamic
7470 linker will fill it in. */
7471 }
7472 else
7473 {
7474 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7475 + htab->glink->output_section->vma
7476 + htab->glink->output_offset);
7477 bfd_put_32 (output_bfd, val,
7478 htab->plt->contents + ent->plt.offset);
7479 }
7480 }
7481
7482 /* Fill in the entry in the .rela.plt section. */
7483 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7484 rela.r_addend = 0;
7485
7486 loc = (htab->relplt->contents
7487 + reloc_index * sizeof (Elf32_External_Rela));
7488 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7489
7490 if (!h->def_regular)
7491 {
7492 /* Mark the symbol as undefined, rather than as
7493 defined in the .plt section. Leave the value if
7494 there were any relocations where pointer equality
7495 matters (this is a clue for the dynamic linker, to
7496 make function pointer comparisons work between an
7497 application and shared library), otherwise set it
7498 to zero. */
7499 sym->st_shndx = SHN_UNDEF;
7500 if (!h->pointer_equality_needed)
7501 sym->st_value = 0;
7502 else if (!h->ref_regular_nonweak)
7503 {
7504 /* This breaks function pointer comparisons, but
7505 that is better than breaking tests for a NULL
7506 function pointer. */
7507 sym->st_value = 0;
7508 }
7509 }
7510 doneone = TRUE;
7511 }
7512
7513 if (htab->plt_type == PLT_NEW)
7514 {
7515 bfd_vma plt;
7516 unsigned char *p;
7517
7518 plt = (ent->plt.offset
7519 + htab->plt->output_section->vma
7520 + htab->plt->output_offset);
7521 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7522
7523 if (info->shared || info->pie)
7524 {
7525 bfd_vma got = 0;
7526
7527 if (ent->addend >= 32768)
7528 got = (ent->addend
7529 + ent->sec->output_section->vma
7530 + ent->sec->output_offset);
7531 else if (htab->elf.hgot != NULL)
7532 got = (htab->elf.hgot->root.u.def.value
7533 + htab->elf.hgot->root.u.def.section->output_section->vma
7534 + htab->elf.hgot->root.u.def.section->output_offset);
7535
7536 plt -= got;
7537
7538 if (plt + 0x8000 < 0x10000)
7539 {
7540 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7541 p += 4;
7542 bfd_put_32 (output_bfd, MTCTR_11, p);
7543 p += 4;
7544 bfd_put_32 (output_bfd, BCTR, p);
7545 p += 4;
7546 bfd_put_32 (output_bfd, NOP, p);
7547 p += 4;
7548 }
7549 else
7550 {
7551 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7552 p += 4;
7553 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7554 p += 4;
7555 bfd_put_32 (output_bfd, MTCTR_11, p);
7556 p += 4;
7557 bfd_put_32 (output_bfd, BCTR, p);
7558 p += 4;
7559 }
7560 }
7561 else
7562 {
7563 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7564 p += 4;
7565 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7566 p += 4;
7567 bfd_put_32 (output_bfd, MTCTR_11, p);
7568 p += 4;
7569 bfd_put_32 (output_bfd, BCTR, p);
7570 p += 4;
7571
7572 /* We only need one non-PIC glink stub. */
7573 break;
7574 }
7575 }
7576 else
7577 break;
7578 }
7579
7580 if (h->needs_copy)
7581 {
7582 asection *s;
7583 Elf_Internal_Rela rela;
7584 bfd_byte *loc;
7585
7586 /* This symbols needs a copy reloc. Set it up. */
7587
7588 #ifdef DEBUG
7589 fprintf (stderr, ", copy");
7590 #endif
7591
7592 BFD_ASSERT (h->dynindx != -1);
7593
7594 if (ppc_elf_hash_entry (h)->has_sda_refs)
7595 s = htab->relsbss;
7596 else
7597 s = htab->relbss;
7598 BFD_ASSERT (s != NULL);
7599
7600 rela.r_offset = (h->root.u.def.value
7601 + h->root.u.def.section->output_section->vma
7602 + h->root.u.def.section->output_offset);
7603 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7604 rela.r_addend = 0;
7605 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7606 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7607 }
7608
7609 #ifdef DEBUG
7610 fprintf (stderr, "\n");
7611 #endif
7612
7613 /* Mark some specially defined symbols as absolute. */
7614 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7615 || (!htab->is_vxworks
7616 && (h == htab->elf.hgot
7617 || strcmp (h->root.root.string,
7618 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7619 sym->st_shndx = SHN_ABS;
7620
7621 return TRUE;
7622 }
7623 \f
7624 static enum elf_reloc_type_class
7625 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7626 {
7627 switch (ELF32_R_TYPE (rela->r_info))
7628 {
7629 case R_PPC_RELATIVE:
7630 return reloc_class_relative;
7631 case R_PPC_REL24:
7632 case R_PPC_ADDR24:
7633 case R_PPC_JMP_SLOT:
7634 return reloc_class_plt;
7635 case R_PPC_COPY:
7636 return reloc_class_copy;
7637 default:
7638 return reloc_class_normal;
7639 }
7640 }
7641 \f
7642 /* Finish up the dynamic sections. */
7643
7644 static bfd_boolean
7645 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7646 struct bfd_link_info *info)
7647 {
7648 asection *sdyn;
7649 asection *splt;
7650 struct ppc_elf_link_hash_table *htab;
7651 bfd_vma got;
7652 bfd * dynobj;
7653
7654 #ifdef DEBUG
7655 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7656 #endif
7657
7658 htab = ppc_elf_hash_table (info);
7659 dynobj = elf_hash_table (info)->dynobj;
7660 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7661 if (htab->is_vxworks)
7662 splt = bfd_get_section_by_name (dynobj, ".plt");
7663 else
7664 splt = NULL;
7665
7666 got = 0;
7667 if (htab->elf.hgot != NULL)
7668 got = (htab->elf.hgot->root.u.def.value
7669 + htab->elf.hgot->root.u.def.section->output_section->vma
7670 + htab->elf.hgot->root.u.def.section->output_offset);
7671
7672 if (htab->elf.dynamic_sections_created)
7673 {
7674 Elf32_External_Dyn *dyncon, *dynconend;
7675
7676 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7677
7678 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7679 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7680 for (; dyncon < dynconend; dyncon++)
7681 {
7682 Elf_Internal_Dyn dyn;
7683 asection *s;
7684
7685 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7686
7687 switch (dyn.d_tag)
7688 {
7689 case DT_PLTGOT:
7690 if (htab->is_vxworks)
7691 s = htab->sgotplt;
7692 else
7693 s = htab->plt;
7694 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7695 break;
7696
7697 case DT_PLTRELSZ:
7698 dyn.d_un.d_val = htab->relplt->size;
7699 break;
7700
7701 case DT_JMPREL:
7702 s = htab->relplt;
7703 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7704 break;
7705
7706 case DT_PPC_GOT:
7707 dyn.d_un.d_ptr = got;
7708 break;
7709
7710 case DT_RELASZ:
7711 if (htab->is_vxworks)
7712 {
7713 if (htab->relplt)
7714 dyn.d_un.d_ptr -= htab->relplt->size;
7715 break;
7716 }
7717 continue;
7718
7719 default:
7720 if (htab->is_vxworks
7721 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7722 break;
7723 continue;
7724 }
7725
7726 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7727 }
7728 }
7729
7730 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7731 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7732 if (htab->got != NULL)
7733 {
7734 unsigned char *p = htab->got->contents;
7735 bfd_vma val;
7736
7737 p += htab->elf.hgot->root.u.def.value;
7738 if (htab->plt_type == PLT_OLD)
7739 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7740
7741 val = 0;
7742 if (sdyn != NULL)
7743 val = sdyn->output_section->vma + sdyn->output_offset;
7744 bfd_put_32 (output_bfd, val, p);
7745
7746 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7747 }
7748
7749 /* Fill in the first entry in the VxWorks procedure linkage table. */
7750 if (splt && splt->size > 0)
7751 {
7752 /* Use the right PLT. */
7753 static const bfd_vma *plt_entry = NULL;
7754 plt_entry = info->shared ?
7755 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7756
7757 if (!info->shared)
7758 {
7759 bfd_vma got_value =
7760 (htab->elf.hgot->root.u.def.section->output_section->vma
7761 + htab->elf.hgot->root.u.def.section->output_offset
7762 + htab->elf.hgot->root.u.def.value);
7763 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7764
7765 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7766 splt->contents + 0);
7767 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7768 splt->contents + 4);
7769 }
7770 else
7771 {
7772 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7773 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7774 }
7775 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7776 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7777 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7778 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7779 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7780 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7781
7782 if (! info->shared)
7783 {
7784 Elf_Internal_Rela rela;
7785 bfd_byte *loc;
7786
7787 loc = htab->srelplt2->contents;
7788
7789 /* Output the @ha relocation for the first instruction. */
7790 rela.r_offset = (htab->plt->output_section->vma
7791 + htab->plt->output_offset
7792 + 2);
7793 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7794 rela.r_addend = 0;
7795 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7796 loc += sizeof (Elf32_External_Rela);
7797
7798 /* Output the @l relocation for the second instruction. */
7799 rela.r_offset = (htab->plt->output_section->vma
7800 + htab->plt->output_offset
7801 + 6);
7802 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7803 rela.r_addend = 0;
7804 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7805 loc += sizeof (Elf32_External_Rela);
7806
7807 /* Fix up the remaining relocations. They may have the wrong
7808 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7809 in which symbols were output. */
7810 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7811 {
7812 Elf_Internal_Rela rel;
7813
7814 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7815 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7816 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7817 loc += sizeof (Elf32_External_Rela);
7818
7819 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7820 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7821 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7822 loc += sizeof (Elf32_External_Rela);
7823
7824 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7825 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7826 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7827 loc += sizeof (Elf32_External_Rela);
7828 }
7829 }
7830 }
7831
7832 if (htab->glink != NULL && htab->glink->contents != NULL)
7833 {
7834 unsigned char *p;
7835 unsigned char *endp;
7836 bfd_vma res0;
7837 unsigned int i;
7838
7839 /*
7840 * PIC glink code is the following:
7841 *
7842 * # ith PLT code stub.
7843 * addis 11,30,(plt+(i-1)*4-got)@ha
7844 * lwz 11,(plt+(i-1)*4-got)@l(11)
7845 * mtctr 11
7846 * bctr
7847 *
7848 * # A table of branches, one for each plt entry.
7849 * # The idea is that the plt call stub loads ctr and r11 with these
7850 * # addresses, so (r11 - res_0) gives the plt index * 4.
7851 * res_0: b PLTresolve
7852 * res_1: b PLTresolve
7853 * .
7854 * # Some number of entries towards the end can be nops
7855 * res_n_m3: nop
7856 * res_n_m2: nop
7857 * res_n_m1:
7858 *
7859 * PLTresolve:
7860 * addis 11,11,(1f-res_0)@ha
7861 * mflr 0
7862 * bcl 20,31,1f
7863 * 1: addi 11,11,(1b-res_0)@l
7864 * mflr 12
7865 * mtlr 0
7866 * sub 11,11,12 # r11 = index * 4
7867 * addis 12,12,(got+4-1b)@ha
7868 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7869 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7870 * mtctr 0
7871 * add 0,11,11
7872 * add 11,0,11 # r11 = index * 12 = reloc offset.
7873 * bctr
7874 */
7875 static const unsigned int pic_plt_resolve[] =
7876 {
7877 ADDIS_11_11,
7878 MFLR_0,
7879 BCL_20_31,
7880 ADDI_11_11,
7881 MFLR_12,
7882 MTLR_0,
7883 SUB_11_11_12,
7884 ADDIS_12_12,
7885 LWZ_0_12,
7886 LWZ_12_12,
7887 MTCTR_0,
7888 ADD_0_11_11,
7889 ADD_11_0_11,
7890 BCTR,
7891 NOP,
7892 NOP
7893 };
7894
7895 /*
7896 * Non-PIC glink code is a little simpler.
7897 *
7898 * # ith PLT code stub.
7899 * lis 11,(plt+(i-1)*4)@ha
7900 * lwz 11,(plt+(i-1)*4)@l(11)
7901 * mtctr 11
7902 * bctr
7903 *
7904 * The branch table is the same, then comes
7905 *
7906 * PLTresolve:
7907 * lis 12,(got+4)@ha
7908 * addis 11,11,(-res_0)@ha
7909 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
7910 * addi 11,11,(-res_0)@l # r11 = index * 4
7911 * mtctr 0
7912 * add 0,11,11
7913 * lwz 12,(got+8)@l(12) # got[2] contains the map address
7914 * add 11,0,11 # r11 = index * 12 = reloc offset.
7915 * bctr
7916 */
7917 static const unsigned int plt_resolve[] =
7918 {
7919 LIS_12,
7920 ADDIS_11_11,
7921 LWZ_0_12,
7922 ADDI_11_11,
7923 MTCTR_0,
7924 ADD_0_11_11,
7925 LWZ_12_12,
7926 ADD_11_0_11,
7927 BCTR,
7928 NOP,
7929 NOP,
7930 NOP,
7931 NOP,
7932 NOP,
7933 NOP,
7934 NOP
7935 };
7936
7937 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7938 abort ();
7939 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7940 abort ();
7941
7942 /* Build the branch table, one for each plt entry (less one),
7943 and perhaps some padding. */
7944 p = htab->glink->contents;
7945 p += htab->glink_pltresolve;
7946 endp = htab->glink->contents;
7947 endp += htab->glink->size - GLINK_PLTRESOLVE;
7948 while (p < endp - 8 * 4)
7949 {
7950 bfd_put_32 (output_bfd, B + endp - p, p);
7951 p += 4;
7952 }
7953 while (p < endp)
7954 {
7955 bfd_put_32 (output_bfd, NOP, p);
7956 p += 4;
7957 }
7958
7959 res0 = (htab->glink_pltresolve
7960 + htab->glink->output_section->vma
7961 + htab->glink->output_offset);
7962
7963 /* Last comes the PLTresolve stub. */
7964 if (info->shared || info->pie)
7965 {
7966 bfd_vma bcl;
7967
7968 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7969 {
7970 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7971 p += 4;
7972 }
7973 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7974
7975 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7976 + htab->glink->output_section->vma
7977 + htab->glink->output_offset);
7978
7979 bfd_put_32 (output_bfd,
7980 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7981 bfd_put_32 (output_bfd,
7982 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7983 bfd_put_32 (output_bfd,
7984 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7985 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7986 {
7987 bfd_put_32 (output_bfd,
7988 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7989 bfd_put_32 (output_bfd,
7990 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7991 }
7992 else
7993 {
7994 bfd_put_32 (output_bfd,
7995 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7996 bfd_put_32 (output_bfd,
7997 LWZ_12_12 + 4, p + 9*4);
7998 }
7999 }
8000 else
8001 {
8002 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8003 {
8004 bfd_put_32 (output_bfd, plt_resolve[i], p);
8005 p += 4;
8006 }
8007 p -= 4 * ARRAY_SIZE (plt_resolve);
8008
8009 bfd_put_32 (output_bfd,
8010 LIS_12 + PPC_HA (got + 4), p + 0*4);
8011 bfd_put_32 (output_bfd,
8012 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8013 bfd_put_32 (output_bfd,
8014 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8015 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8016 {
8017 bfd_put_32 (output_bfd,
8018 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8019 bfd_put_32 (output_bfd,
8020 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8021 }
8022 else
8023 {
8024 bfd_put_32 (output_bfd,
8025 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8026 bfd_put_32 (output_bfd,
8027 LWZ_12_12 + 4, p + 6*4);
8028 }
8029 }
8030 }
8031
8032 return TRUE;
8033 }
8034 \f
8035 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8036 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8037 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8038 #define TARGET_BIG_NAME "elf32-powerpc"
8039 #define ELF_ARCH bfd_arch_powerpc
8040 #define ELF_MACHINE_CODE EM_PPC
8041 #ifdef __QNXTARGET__
8042 #define ELF_MAXPAGESIZE 0x1000
8043 #else
8044 #define ELF_MAXPAGESIZE 0x10000
8045 #endif
8046 #define ELF_MINPAGESIZE 0x1000
8047 #define ELF_COMMONPAGESIZE 0x1000
8048 #define elf_info_to_howto ppc_elf_info_to_howto
8049
8050 #ifdef EM_CYGNUS_POWERPC
8051 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8052 #endif
8053
8054 #ifdef EM_PPC_OLD
8055 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8056 #endif
8057
8058 #define elf_backend_plt_not_loaded 1
8059 #define elf_backend_can_gc_sections 1
8060 #define elf_backend_can_refcount 1
8061 #define elf_backend_rela_normal 1
8062
8063 #define bfd_elf32_mkobject ppc_elf_mkobject
8064 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8065 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8066 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8067 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8068 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8069 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8070 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8071
8072 #define elf_backend_object_p ppc_elf_object_p
8073 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8074 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8075 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8076 #define elf_backend_relocate_section ppc_elf_relocate_section
8077 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8078 #define elf_backend_check_relocs ppc_elf_check_relocs
8079 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8080 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8081 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8082 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8083 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8084 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8085 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8086 #define elf_backend_fake_sections ppc_elf_fake_sections
8087 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8088 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8089 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8090 #define elf_backend_write_core_note ppc_elf_write_core_note
8091 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8092 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8093 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8094 #define elf_backend_write_section ppc_elf_write_section
8095 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8096 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8097 #define elf_backend_action_discarded ppc_elf_action_discarded
8098 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8099
8100 #include "elf32-target.h"
8101
8102 /* VxWorks Target */
8103
8104 #undef TARGET_LITTLE_SYM
8105 #undef TARGET_LITTLE_NAME
8106
8107 #undef TARGET_BIG_SYM
8108 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8109 #undef TARGET_BIG_NAME
8110 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8111
8112 /* VxWorks uses the elf default section flags for .plt. */
8113 static const struct bfd_elf_special_section *
8114 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8115 {
8116 if (sec->name == NULL)
8117 return NULL;
8118
8119 if (strcmp (sec->name, ".plt") == 0)
8120 return _bfd_elf_get_sec_type_attr (abfd, sec);
8121
8122 return ppc_elf_get_sec_type_attr (abfd, sec);
8123 }
8124
8125 /* Like ppc_elf_link_hash_table_create, but overrides
8126 appropriately for VxWorks. */
8127 static struct bfd_link_hash_table *
8128 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8129 {
8130 struct bfd_link_hash_table *ret;
8131
8132 ret = ppc_elf_link_hash_table_create (abfd);
8133 if (ret)
8134 {
8135 struct ppc_elf_link_hash_table *htab
8136 = (struct ppc_elf_link_hash_table *)ret;
8137 htab->is_vxworks = 1;
8138 htab->plt_type = PLT_VXWORKS;
8139 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8140 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8141 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8142 }
8143 return ret;
8144 }
8145
8146 /* Tweak magic VxWorks symbols as they are loaded. */
8147 static bfd_boolean
8148 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8149 struct bfd_link_info *info,
8150 Elf_Internal_Sym *sym,
8151 const char **namep ATTRIBUTE_UNUSED,
8152 flagword *flagsp ATTRIBUTE_UNUSED,
8153 asection **secp,
8154 bfd_vma *valp)
8155 {
8156 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8157 valp))
8158 return FALSE;
8159
8160 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8161 }
8162
8163 static void
8164 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8165 {
8166 ppc_elf_final_write_processing(abfd, linker);
8167 elf_vxworks_final_write_processing(abfd, linker);
8168 }
8169
8170 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8171 define it. */
8172 #undef elf_backend_want_plt_sym
8173 #define elf_backend_want_plt_sym 1
8174 #undef elf_backend_want_got_plt
8175 #define elf_backend_want_got_plt 1
8176 #undef elf_backend_got_symbol_offset
8177 #define elf_backend_got_symbol_offset 0
8178 #undef elf_backend_plt_not_loaded
8179 #define elf_backend_plt_not_loaded 0
8180 #undef elf_backend_plt_readonly
8181 #define elf_backend_plt_readonly 1
8182 #undef elf_backend_got_header_size
8183 #define elf_backend_got_header_size 12
8184
8185 #undef bfd_elf32_get_synthetic_symtab
8186
8187 #undef bfd_elf32_bfd_link_hash_table_create
8188 #define bfd_elf32_bfd_link_hash_table_create \
8189 ppc_elf_vxworks_link_hash_table_create
8190 #undef elf_backend_add_symbol_hook
8191 #define elf_backend_add_symbol_hook \
8192 ppc_elf_vxworks_add_symbol_hook
8193 #undef elf_backend_link_output_symbol_hook
8194 #define elf_backend_link_output_symbol_hook \
8195 elf_vxworks_link_output_symbol_hook
8196 #undef elf_backend_final_write_processing
8197 #define elf_backend_final_write_processing \
8198 ppc_elf_vxworks_final_write_processing
8199 #undef elf_backend_get_sec_type_attr
8200 #define elf_backend_get_sec_type_attr \
8201 ppc_elf_vxworks_get_sec_type_attr
8202 #undef elf_backend_emit_relocs
8203 #define elf_backend_emit_relocs \
8204 elf_vxworks_emit_relocs
8205
8206 #undef elf32_bed
8207 #define elf32_bed ppc_elf_vxworks_bed
8208
8209 #include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.202435 seconds and 4 git commands to generate.