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bfd/
[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 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 2 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 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35 #include "elf-vxworks.h"
36
37 /* RELA relocations are used here. */
38
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
50
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
58
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
62
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
64
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
68 [VXWORKS_PLT_ENTRY_SIZE / 4] =
69 {
70 0x3d800000, /* lis r12,0 */
71 0x818c0000, /* lwz r12,0(r12) */
72 0x7d8903a6, /* mtctr r12 */
73 0x4e800420, /* bctr */
74 0x39600000, /* li r11,0 */
75 0x48000000, /* b 14 <.PLT0resolve+0x4> */
76 0x60000000, /* nop */
77 0x60000000, /* nop */
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
80 [VXWORKS_PLT_ENTRY_SIZE / 4] =
81 {
82 0x3d9e0000, /* addis r12,r30,0 */
83 0x818c0000, /* lwz r12,0(r12) */
84 0x7d8903a6, /* mtctr r12 */
85 0x4e800420, /* bctr */
86 0x39600000, /* li r11,0 */
87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
88 0x60000000, /* nop */
89 0x60000000, /* nop */
90 };
91
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
96 {
97 0x3d800000, /* lis r12,0 */
98 0x398c0000, /* addi r12,r12,0 */
99 0x800c0008, /* lwz r0,8(r12) */
100 0x7c0903a6, /* mtctr r0 */
101 0x818c0004, /* lwz r12,4(r12) */
102 0x4e800420, /* bctr */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
108 {
109 0x819e0008, /* lwz r12,8(r30) */
110 0x7d8903a6, /* mtctr r12 */
111 0x819e0004, /* lwz r12,4(r30) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 };
118
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
121
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
129
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
154
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158 \f
159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
160
161 static reloc_howto_type ppc_elf_howto_raw[] = {
162 /* This reloc does nothing. */
163 HOWTO (R_PPC_NONE, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_PPC_NONE", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 /* A standard 32 bit relocation. */
178 HOWTO (R_PPC_ADDR32, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_PPC_ADDR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
194 HOWTO (R_PPC_ADDR24, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 26, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC_ADDR24", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0x3fffffc, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* A standard 16 bit relocation. */
209 HOWTO (R_PPC_ADDR16, /* type */
210 0, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC_ADDR16", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 /* A 16 bit relocation without overflow. */
224 HOWTO (R_PPC_ADDR16_LO, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR16_LO", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* The high order 16 bits of an address. */
239 HOWTO (R_PPC_ADDR16_HI, /* type */
240 16, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16_HI", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
255 HOWTO (R_PPC_ADDR16_HA, /* type */
256 16, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 FALSE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 ppc_elf_addr16_ha_reloc, /* special_function */
263 "R_PPC_ADDR16_HA", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
271 HOWTO (R_PPC_ADDR14, /* type */
272 0, /* rightshift */
273 2, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC_ADDR14", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xfffc, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14_BRTAKEN",/* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRNTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A relative 26 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL24, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 26, /* bitsize */
324 TRUE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_signed, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC_REL24", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x3fffffc, /* dst_mask */
332 TRUE), /* pcrel_offset */
333
334 /* A relative 16 bit branch; the lower two bits must be zero. */
335 HOWTO (R_PPC_REL14, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 TRUE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_REL14", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 TRUE), /* pcrel_offset */
348
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14_BRTAKEN", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRNTAKEN",/* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
385 HOWTO (R_PPC_GOT16, /* type */
386 0, /* rightshift */
387 1, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_GOT16", /* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
401 HOWTO (R_PPC_GOT16_LO, /* type */
402 0, /* rightshift */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16_LO", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_HI, /* type */
418 16, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_HI", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HA, /* type */
434 16, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield, /* complain_on_overflow */
440 ppc_elf_addr16_ha_reloc, /* special_function */
441 "R_PPC_GOT16_HA", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
449 HOWTO (R_PPC_PLTREL24, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 26, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_PPC_PLTREL24", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x3fffffc, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
468 HOWTO (R_PPC_COPY, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_PPC_COPY", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
484 HOWTO (R_PPC_GLOB_DAT, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 32, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_PPC_GLOB_DAT", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffffffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Marks a procedure linkage table entry for a symbol. */
499 HOWTO (R_PPC_JMP_SLOT, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC_JMP_SLOT", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
516 HOWTO (R_PPC_RELATIVE, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
533 HOWTO (R_PPC_LOCAL24PC, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 26, /* bitsize */
537 TRUE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_signed, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_LOCAL24PC", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0x3fffffc, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 /* Like R_PPC_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative */
578 HOWTO (R_PPC_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_REL32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
591
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
594 HOWTO (R_PPC_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC_PLT16_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HA, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_bitfield, /* complain_on_overflow */
665 ppc_elf_addr16_ha_reloc, /* special_function */
666 "R_PPC_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
674 HOWTO (R_PPC_SDAREL16, /* type */
675 0, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_PPC_SDAREL16", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 16-bit section relative relocation. */
689 HOWTO (R_PPC_SECTOFF, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_bitfield, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC_SECTOFF", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* 16-bit lower half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_SECTOFF_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit upper half section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_bitfield, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_SECTOFF_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit upper half adjusted section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_HA, /* type */
735 16, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 ppc_elf_addr16_ha_reloc, /* special_function */
742 "R_PPC_SECTOFF_HA", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Marker reloc for TLS. */
749 HOWTO (R_PPC_TLS,
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_TLS", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
765 HOWTO (R_PPC_DTPMOD32,
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc_elf_unhandled_reloc, /* special_function */
773 "R_PPC_DTPMOD32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
782 HOWTO (R_PPC_DTPREL32,
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc_elf_unhandled_reloc, /* special_function */
790 "R_PPC_DTPREL32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* A 16 bit dtprel reloc. */
797 HOWTO (R_PPC_DTPREL16,
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed, /* complain_on_overflow */
804 ppc_elf_unhandled_reloc, /* special_function */
805 "R_PPC_DTPREL16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* Like DTPREL16, but no overflow. */
812 HOWTO (R_PPC_DTPREL16_LO,
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc_elf_unhandled_reloc, /* special_function */
820 "R_PPC_DTPREL16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
827 HOWTO (R_PPC_DTPREL16_HI,
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
842 HOWTO (R_PPC_DTPREL16_HA,
843 16, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16_HA", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
858 HOWTO (R_PPC_TPREL32,
859 0, /* rightshift */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
861 32, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc_elf_unhandled_reloc, /* special_function */
866 "R_PPC_TPREL32", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffffffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* A 16 bit tprel reloc. */
873 HOWTO (R_PPC_TPREL16,
874 0, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_signed, /* complain_on_overflow */
880 ppc_elf_unhandled_reloc, /* special_function */
881 "R_PPC_TPREL16", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Like TPREL16, but no overflow. */
888 HOWTO (R_PPC_TPREL16_LO,
889 0, /* rightshift */
890 1, /* size (0 = byte, 1 = short, 2 = long) */
891 16, /* bitsize */
892 FALSE, /* pc_relative */
893 0, /* bitpos */
894 complain_overflow_dont, /* complain_on_overflow */
895 ppc_elf_unhandled_reloc, /* special_function */
896 "R_PPC_TPREL16_LO", /* name */
897 FALSE, /* partial_inplace */
898 0, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
901
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
903 HOWTO (R_PPC_TPREL16_HI,
904 16, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL16_HI", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
918 HOWTO (R_PPC_TPREL16_HA,
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16_HA", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
935 HOWTO (R_PPC_GOT_TLSGD16,
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_signed, /* complain_on_overflow */
942 ppc_elf_unhandled_reloc, /* special_function */
943 "R_PPC_GOT_TLSGD16", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like GOT_TLSGD16, but no overflow. */
950 HOWTO (R_PPC_GOT_TLSGD16_LO,
951 0, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_GOT_TLSGD16_LO", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
965 HOWTO (R_PPC_GOT_TLSGD16_HI,
966 16, /* rightshift */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
968 16, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 ppc_elf_unhandled_reloc, /* special_function */
973 "R_PPC_GOT_TLSGD16_HI", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
980 HOWTO (R_PPC_GOT_TLSGD16_HA,
981 16, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16_HA", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
997 HOWTO (R_PPC_GOT_TLSLD16,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_signed, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_GOT_TLSLD16", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like GOT_TLSLD16, but no overflow. */
1012 HOWTO (R_PPC_GOT_TLSLD16_LO,
1013 0, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_GOT_TLSLD16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1027 HOWTO (R_PPC_GOT_TLSLD16_HI,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_GOT_TLSLD16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1042 HOWTO (R_PPC_GOT_TLSLD16_HA,
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16_HA", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1058 HOWTO (R_PPC_GOT_DTPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_GOT_DTPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like GOT_DTPREL16, but no overflow. */
1073 HOWTO (R_PPC_GOT_DTPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_GOT_DTPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_GOT_DTPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_GOT_DTPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_GOT_DTPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1119 HOWTO (R_PPC_GOT_TPREL16,
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_signed, /* complain_on_overflow */
1126 ppc_elf_unhandled_reloc, /* special_function */
1127 "R_PPC_GOT_TPREL16", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like GOT_TPREL16, but no overflow. */
1134 HOWTO (R_PPC_GOT_TPREL16_LO,
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc_elf_unhandled_reloc, /* special_function */
1142 "R_PPC_GOT_TPREL16_LO", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xffff, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1149 HOWTO (R_PPC_GOT_TPREL16_HI,
1150 16, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc_elf_unhandled_reloc, /* special_function */
1157 "R_PPC_GOT_TPREL16_HI", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xffff, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1164 HOWTO (R_PPC_GOT_TPREL16_HA,
1165 16, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16_HA", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1180
1181 /* 32 bit value resulting from the addend minus the symbol. */
1182 HOWTO (R_PPC_EMB_NADDR32, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 32, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield, /* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_PPC_EMB_NADDR32", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffffffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* 16 bit value resulting from the addend minus the symbol. */
1197 HOWTO (R_PPC_EMB_NADDR16, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_bitfield, /* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_PPC_EMB_NADDR16", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* 16 bit value resulting from the addend minus the symbol. */
1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC_EMB_ADDR16_LO", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* The high order 16 bits of the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR16_HI", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1245 16, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc_elf_addr16_ha_reloc, /* special_function */
1252 "R_PPC_EMB_NADDR16_HA", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1261 HOWTO (R_PPC_EMB_SDAI16, /* type */
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_bitfield, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 "R_PPC_EMB_SDAI16", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC_EMB_SDA2I16", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xffff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_signed, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC_EMB_SDA2REL", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1311 HOWTO (R_PPC_EMB_SDA21, /* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_signed, /* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_PPC_EMB_SDA21", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1331
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1335 HOWTO (R_PPC_EMB_RELSDA, /* type */
1336 0, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 TRUE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_signed, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC_EMB_RELSDA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* A 16 bit relative relocation. */
1350 HOWTO (R_PPC_REL16, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 TRUE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_bitfield, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_REL16", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 TRUE), /* pcrel_offset */
1363
1364 /* A 16 bit relative relocation without overflow. */
1365 HOWTO (R_PPC_REL16_LO, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 TRUE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_PPC_REL16_LO", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 TRUE), /* pcrel_offset */
1378
1379 /* The high order 16 bits of a relative address. */
1380 HOWTO (R_PPC_REL16_HI, /* type */
1381 16, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 TRUE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_REL16_HI", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 TRUE), /* pcrel_offset */
1393
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1396 HOWTO (R_PPC_REL16_HA, /* type */
1397 16, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 TRUE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_dont, /* complain_on_overflow */
1403 ppc_elf_addr16_ha_reloc, /* special_function */
1404 "R_PPC_REL16_HA", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xffff, /* dst_mask */
1408 TRUE), /* pcrel_offset */
1409
1410 /* GNU extension to record C++ vtable hierarchy. */
1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1412 0, /* rightshift */
1413 0, /* size (0 = byte, 1 = short, 2 = long) */
1414 0, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 NULL, /* special_function */
1419 "R_PPC_GNU_VTINHERIT", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* GNU extension to record C++ vtable member usage. */
1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1427 0, /* rightshift */
1428 0, /* size (0 = byte, 1 = short, 2 = long) */
1429 0, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 NULL, /* special_function */
1434 "R_PPC_GNU_VTENTRY", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Phony reloc to handle AIX style TOC entries. */
1441 HOWTO (R_PPC_TOC16, /* type */
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 bfd_elf_generic_reloc, /* special_function */
1449 "R_PPC_TOC16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454 };
1455 \f
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1457
1458 static void
1459 ppc_elf_howto_init (void)
1460 {
1461 unsigned int i, type;
1462
1463 for (i = 0;
1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1465 i++)
1466 {
1467 type = ppc_elf_howto_raw[i].type;
1468 if (type >= (sizeof (ppc_elf_howto_table)
1469 / sizeof (ppc_elf_howto_table[0])))
1470 abort ();
1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1472 }
1473 }
1474
1475 static reloc_howto_type *
1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1477 bfd_reloc_code_real_type code)
1478 {
1479 enum elf_ppc_reloc_type r;
1480
1481 /* Initialize howto table if not already done. */
1482 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1483 ppc_elf_howto_init ();
1484
1485 switch (code)
1486 {
1487 default:
1488 return NULL;
1489
1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1575 }
1576
1577 return ppc_elf_howto_table[r];
1578 };
1579
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1581
1582 static void
1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1584 arelent *cache_ptr,
1585 Elf_Internal_Rela *dst)
1586 {
1587 /* Initialize howto table if not already done. */
1588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1589 ppc_elf_howto_init ();
1590
1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1593 }
1594
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1596
1597 static bfd_reloc_status_type
1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1599 arelent *reloc_entry,
1600 asymbol *symbol,
1601 void *data ATTRIBUTE_UNUSED,
1602 asection *input_section,
1603 bfd *output_bfd,
1604 char **error_message ATTRIBUTE_UNUSED)
1605 {
1606 bfd_vma relocation;
1607
1608 if (output_bfd != NULL)
1609 {
1610 reloc_entry->address += input_section->output_offset;
1611 return bfd_reloc_ok;
1612 }
1613
1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1615 return bfd_reloc_outofrange;
1616
1617 if (bfd_is_com_section (symbol->section))
1618 relocation = 0;
1619 else
1620 relocation = symbol->value;
1621
1622 relocation += symbol->section->output_section->vma;
1623 relocation += symbol->section->output_offset;
1624 relocation += reloc_entry->addend;
1625 if (reloc_entry->howto->pc_relative)
1626 relocation -= reloc_entry->address;
1627
1628 reloc_entry->addend += (relocation & 0x8000) << 1;
1629
1630 return bfd_reloc_continue;
1631 }
1632
1633 static bfd_reloc_status_type
1634 ppc_elf_unhandled_reloc (bfd *abfd,
1635 arelent *reloc_entry,
1636 asymbol *symbol,
1637 void *data,
1638 asection *input_section,
1639 bfd *output_bfd,
1640 char **error_message)
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1645 if (output_bfd != NULL)
1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1647 input_section, output_bfd, error_message);
1648
1649 if (error_message != NULL)
1650 {
1651 static char buf[60];
1652 sprintf (buf, _("generic linker can't handle %s"),
1653 reloc_entry->howto->name);
1654 *error_message = buf;
1655 }
1656 return bfd_reloc_dangerous;
1657 }
1658 \f
1659 /* Sections created by the linker. */
1660
1661 typedef struct elf_linker_section
1662 {
1663 /* Pointer to the bfd section. */
1664 asection *section;
1665 /* Section name. */
1666 const char *name;
1667 /* Associated bss section name. */
1668 const char *bss_name;
1669 /* Associated symbol name. */
1670 const char *sym_name;
1671 /* Associated symbol. */
1672 struct elf_link_hash_entry *sym;
1673 } elf_linker_section_t;
1674
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1678
1679 typedef struct elf_linker_section_pointers
1680 {
1681 /* next allocated pointer for this symbol */
1682 struct elf_linker_section_pointers *next;
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1688 elf_linker_section_t *lsect;
1689 } elf_linker_section_pointers_t;
1690
1691 struct ppc_elf_obj_tdata
1692 {
1693 struct elf_obj_tdata elf;
1694
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1697 elf_linker_section_pointers_t **linker_section_pointers;
1698 };
1699
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1702
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1705
1706 /* Override the generic function because we store some extras. */
1707
1708 static bfd_boolean
1709 ppc_elf_mkobject (bfd *abfd)
1710 {
1711 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1712 abfd->tdata.any = bfd_zalloc (abfd, amt);
1713 if (abfd->tdata.any == NULL)
1714 return FALSE;
1715 return TRUE;
1716 }
1717
1718 /* Fix bad default arch selected for a 32 bit input bfd when the
1719 default is 64 bit. */
1720
1721 static bfd_boolean
1722 ppc_elf_object_p (bfd *abfd)
1723 {
1724 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1725 {
1726 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1727
1728 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1729 {
1730 /* Relies on arch after 64 bit default being 32 bit default. */
1731 abfd->arch_info = abfd->arch_info->next;
1732 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1733 }
1734 }
1735 return TRUE;
1736 }
1737
1738 /* Function to set whether a module needs the -mrelocatable bit set. */
1739
1740 static bfd_boolean
1741 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1742 {
1743 BFD_ASSERT (!elf_flags_init (abfd)
1744 || elf_elfheader (abfd)->e_flags == flags);
1745
1746 elf_elfheader (abfd)->e_flags = flags;
1747 elf_flags_init (abfd) = TRUE;
1748 return TRUE;
1749 }
1750
1751 /* Support for core dump NOTE sections. */
1752
1753 static bfd_boolean
1754 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1755 {
1756 int offset;
1757 unsigned int size;
1758
1759 switch (note->descsz)
1760 {
1761 default:
1762 return FALSE;
1763
1764 case 268: /* Linux/PPC. */
1765 /* pr_cursig */
1766 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1767
1768 /* pr_pid */
1769 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1770
1771 /* pr_reg */
1772 offset = 72;
1773 size = 192;
1774
1775 break;
1776 }
1777
1778 /* Make a ".reg/999" section. */
1779 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1780 size, note->descpos + offset);
1781 }
1782
1783 static bfd_boolean
1784 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1785 {
1786 switch (note->descsz)
1787 {
1788 default:
1789 return FALSE;
1790
1791 case 128: /* Linux/PPC elf_prpsinfo. */
1792 elf_tdata (abfd)->core_program
1793 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1794 elf_tdata (abfd)->core_command
1795 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1796 }
1797
1798 /* Note that for some reason, a spurious space is tacked
1799 onto the end of the args in some (at least one anyway)
1800 implementations, so strip it off if it exists. */
1801
1802 {
1803 char *command = elf_tdata (abfd)->core_command;
1804 int n = strlen (command);
1805
1806 if (0 < n && command[n - 1] == ' ')
1807 command[n - 1] = '\0';
1808 }
1809
1810 return TRUE;
1811 }
1812
1813 /* Return address for Ith PLT stub in section PLT, for relocation REL
1814 or (bfd_vma) -1 if it should not be included. */
1815
1816 static bfd_vma
1817 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1818 const asection *plt ATTRIBUTE_UNUSED,
1819 const arelent *rel)
1820 {
1821 return rel->address;
1822 }
1823
1824 /* Handle a PowerPC specific section when reading an object file. This
1825 is called when bfd_section_from_shdr finds a section with an unknown
1826 type. */
1827
1828 static bfd_boolean
1829 ppc_elf_section_from_shdr (bfd *abfd,
1830 Elf_Internal_Shdr *hdr,
1831 const char *name,
1832 int shindex)
1833 {
1834 asection *newsect;
1835 flagword flags;
1836
1837 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1838 return FALSE;
1839
1840 newsect = hdr->bfd_section;
1841 flags = bfd_get_section_flags (abfd, newsect);
1842 if (hdr->sh_flags & SHF_EXCLUDE)
1843 flags |= SEC_EXCLUDE;
1844
1845 if (hdr->sh_type == SHT_ORDERED)
1846 flags |= SEC_SORT_ENTRIES;
1847
1848 bfd_set_section_flags (abfd, newsect, flags);
1849 return TRUE;
1850 }
1851
1852 /* Set up any other section flags and such that may be necessary. */
1853
1854 static bfd_boolean
1855 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1856 Elf_Internal_Shdr *shdr,
1857 asection *asect)
1858 {
1859 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1860 shdr->sh_flags |= SHF_EXCLUDE;
1861
1862 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1863 shdr->sh_type = SHT_ORDERED;
1864
1865 return TRUE;
1866 }
1867
1868 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1869 need to bump up the number of section headers. */
1870
1871 static int
1872 ppc_elf_additional_program_headers (bfd *abfd,
1873 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1874 {
1875 asection *s;
1876 int ret = 0;
1877
1878 s = bfd_get_section_by_name (abfd, ".sbss2");
1879 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1880 ++ret;
1881
1882 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1883 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1884 ++ret;
1885
1886 return ret;
1887 }
1888
1889 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1890 .PPC.EMB.sbss0 a normal section, and not a bss section so
1891 that the linker doesn't crater when trying to make more than
1892 2 sections. */
1893
1894 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1895 {
1896 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1897 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1898 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1899 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1900 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1901 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1902 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1903 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1904 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1905 { NULL, 0, 0, 0, 0 }
1906 };
1907
1908 /* This is what we want for new plt/got. */
1909 static struct bfd_elf_special_section ppc_alt_plt =
1910 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
1911
1912 static const struct bfd_elf_special_section *
1913 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1914 {
1915 const struct bfd_elf_special_section *ssect;
1916
1917 /* See if this is one of the special sections. */
1918 if (sec->name == NULL)
1919 return NULL;
1920
1921 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1922 sec->use_rela_p);
1923 if (ssect != NULL)
1924 {
1925 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1926 ssect = &ppc_alt_plt;
1927 return ssect;
1928 }
1929
1930 return _bfd_elf_get_sec_type_attr (abfd, sec);
1931 }
1932 \f
1933 /* Very simple linked list structure for recording apuinfo values. */
1934 typedef struct apuinfo_list
1935 {
1936 struct apuinfo_list *next;
1937 unsigned long value;
1938 }
1939 apuinfo_list;
1940
1941 static apuinfo_list *head;
1942
1943
1944 static void
1945 apuinfo_list_init (void)
1946 {
1947 head = NULL;
1948 }
1949
1950 static void
1951 apuinfo_list_add (unsigned long value)
1952 {
1953 apuinfo_list *entry = head;
1954
1955 while (entry != NULL)
1956 {
1957 if (entry->value == value)
1958 return;
1959 entry = entry->next;
1960 }
1961
1962 entry = bfd_malloc (sizeof (* entry));
1963 if (entry == NULL)
1964 return;
1965
1966 entry->value = value;
1967 entry->next = head;
1968 head = entry;
1969 }
1970
1971 static unsigned
1972 apuinfo_list_length (void)
1973 {
1974 apuinfo_list *entry;
1975 unsigned long count;
1976
1977 for (entry = head, count = 0;
1978 entry;
1979 entry = entry->next)
1980 ++ count;
1981
1982 return count;
1983 }
1984
1985 static inline unsigned long
1986 apuinfo_list_element (unsigned long number)
1987 {
1988 apuinfo_list * entry;
1989
1990 for (entry = head;
1991 entry && number --;
1992 entry = entry->next)
1993 ;
1994
1995 return entry ? entry->value : 0;
1996 }
1997
1998 static void
1999 apuinfo_list_finish (void)
2000 {
2001 apuinfo_list *entry;
2002
2003 for (entry = head; entry;)
2004 {
2005 apuinfo_list *next = entry->next;
2006 free (entry);
2007 entry = next;
2008 }
2009
2010 head = NULL;
2011 }
2012
2013 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2014 #define APUINFO_LABEL "APUinfo"
2015
2016 /* Scan the input BFDs and create a linked list of
2017 the APUinfo values that will need to be emitted. */
2018
2019 static void
2020 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2021 {
2022 bfd *ibfd;
2023 asection *asec;
2024 char *buffer;
2025 unsigned num_input_sections;
2026 bfd_size_type output_section_size;
2027 unsigned i;
2028 unsigned num_entries;
2029 unsigned long offset;
2030 unsigned long length;
2031 const char *error_message = NULL;
2032
2033 if (link_info == NULL)
2034 return;
2035
2036 /* Scan the input bfds, looking for apuinfo sections. */
2037 num_input_sections = 0;
2038 output_section_size = 0;
2039
2040 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2041 {
2042 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2043 if (asec)
2044 {
2045 ++ num_input_sections;
2046 output_section_size += asec->size;
2047 }
2048 }
2049
2050 /* We need at least one input sections
2051 in order to make merging worthwhile. */
2052 if (num_input_sections < 1)
2053 return;
2054
2055 /* Just make sure that the output section exists as well. */
2056 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2057 if (asec == NULL)
2058 return;
2059
2060 /* Allocate a buffer for the contents of the input sections. */
2061 buffer = bfd_malloc (output_section_size);
2062 if (buffer == NULL)
2063 return;
2064
2065 offset = 0;
2066 apuinfo_list_init ();
2067
2068 /* Read in the input sections contents. */
2069 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2070 {
2071 unsigned long datum;
2072 char *ptr;
2073
2074 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2075 if (asec == NULL)
2076 continue;
2077
2078 length = asec->size;
2079 if (length < 24)
2080 {
2081 error_message = _("corrupt or empty %s section in %B");
2082 goto fail;
2083 }
2084
2085 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2086 || (bfd_bread (buffer + offset, length, ibfd) != length))
2087 {
2088 error_message = _("unable to read in %s section from %B");
2089 goto fail;
2090 }
2091
2092 /* Process the contents of the section. */
2093 ptr = buffer + offset;
2094 error_message = _("corrupt %s section in %B");
2095
2096 /* Verify the contents of the header. Note - we have to
2097 extract the values this way in order to allow for a
2098 host whose endian-ness is different from the target. */
2099 datum = bfd_get_32 (ibfd, ptr);
2100 if (datum != sizeof APUINFO_LABEL)
2101 goto fail;
2102
2103 datum = bfd_get_32 (ibfd, ptr + 8);
2104 if (datum != 0x2)
2105 goto fail;
2106
2107 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2108 goto fail;
2109
2110 /* Get the number of bytes used for apuinfo entries. */
2111 datum = bfd_get_32 (ibfd, ptr + 4);
2112 if (datum + 20 != length)
2113 goto fail;
2114
2115 /* Make sure that we do not run off the end of the section. */
2116 if (offset + length > output_section_size)
2117 goto fail;
2118
2119 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2120 for (i = 0; i < datum; i += 4)
2121 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2122
2123 /* Update the offset. */
2124 offset += length;
2125 }
2126
2127 error_message = NULL;
2128
2129 /* Compute the size of the output section. */
2130 num_entries = apuinfo_list_length ();
2131 output_section_size = 20 + num_entries * 4;
2132
2133 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2134
2135 if (! bfd_set_section_size (abfd, asec, output_section_size))
2136 ibfd = abfd,
2137 error_message = _("warning: unable to set size of %s section in %B");
2138
2139 fail:
2140 free (buffer);
2141
2142 if (error_message)
2143 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2144 }
2145
2146 /* Prevent the output section from accumulating the input sections'
2147 contents. We have already stored this in our linked list structure. */
2148
2149 static bfd_boolean
2150 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2151 asection *asec,
2152 bfd_byte *contents ATTRIBUTE_UNUSED)
2153 {
2154 return (apuinfo_list_length ()
2155 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2156 }
2157
2158 /* Finally we can generate the output section. */
2159
2160 static void
2161 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2162 {
2163 bfd_byte *buffer;
2164 asection *asec;
2165 unsigned i;
2166 unsigned num_entries;
2167 bfd_size_type length;
2168
2169 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2170 if (asec == NULL)
2171 return;
2172
2173 if (apuinfo_list_length () == 0)
2174 return;
2175
2176 length = asec->size;
2177 if (length < 20)
2178 return;
2179
2180 buffer = bfd_malloc (length);
2181 if (buffer == NULL)
2182 {
2183 (*_bfd_error_handler)
2184 (_("failed to allocate space for new APUinfo section."));
2185 return;
2186 }
2187
2188 /* Create the apuinfo header. */
2189 num_entries = apuinfo_list_length ();
2190 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2191 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2192 bfd_put_32 (abfd, 0x2, buffer + 8);
2193 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2194
2195 length = 20;
2196 for (i = 0; i < num_entries; i++)
2197 {
2198 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2199 length += 4;
2200 }
2201
2202 if (length != asec->size)
2203 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2204
2205 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2206 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2207
2208 free (buffer);
2209
2210 apuinfo_list_finish ();
2211 }
2212 \f
2213 /* The following functions are specific to the ELF linker, while
2214 functions above are used generally. They appear in this file more
2215 or less in the order in which they are called. eg.
2216 ppc_elf_check_relocs is called early in the link process,
2217 ppc_elf_finish_dynamic_sections is one of the last functions
2218 called. */
2219
2220 /* The PPC linker needs to keep track of the number of relocs that it
2221 decides to copy as dynamic relocs in check_relocs for each symbol.
2222 This is so that it can later discard them if they are found to be
2223 unnecessary. We store the information in a field extending the
2224 regular ELF linker hash table. */
2225
2226 struct ppc_elf_dyn_relocs
2227 {
2228 struct ppc_elf_dyn_relocs *next;
2229
2230 /* The input section of the reloc. */
2231 asection *sec;
2232
2233 /* Total number of relocs copied for the input section. */
2234 bfd_size_type count;
2235
2236 /* Number of pc-relative relocs copied for the input section. */
2237 bfd_size_type pc_count;
2238 };
2239
2240 /* Track PLT entries needed for a given symbol. We might need more
2241 than one glink entry per symbol. */
2242 struct plt_entry
2243 {
2244 struct plt_entry *next;
2245
2246 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2247 This field stores the offset into .got2 used to initialise the
2248 GOT pointer reg. It will always be at least 32768 (and for
2249 current gcc this is the only offset used). */
2250 bfd_vma addend;
2251
2252 /* The .got2 section. */
2253 asection *sec;
2254
2255 /* PLT refcount or offset. */
2256 union
2257 {
2258 bfd_signed_vma refcount;
2259 bfd_vma offset;
2260 } plt;
2261
2262 /* .glink stub offset. */
2263 bfd_vma glink_offset;
2264 };
2265
2266 /* Of those relocs that might be copied as dynamic relocs, this macro
2267 selects those that must be copied when linking a shared library,
2268 even when the symbol is local. */
2269
2270 #define MUST_BE_DYN_RELOC(RTYPE) \
2271 ((RTYPE) != R_PPC_REL24 \
2272 && (RTYPE) != R_PPC_REL14 \
2273 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2274 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2275 && (RTYPE) != R_PPC_REL32)
2276
2277 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2278 copying dynamic variables from a shared lib into an app's dynbss
2279 section, and instead use a dynamic relocation to point into the
2280 shared lib. */
2281 #define ELIMINATE_COPY_RELOCS 1
2282
2283 /* PPC ELF linker hash entry. */
2284
2285 struct ppc_elf_link_hash_entry
2286 {
2287 struct elf_link_hash_entry elf;
2288
2289 /* If this symbol is used in the linker created sections, the processor
2290 specific backend uses this field to map the field into the offset
2291 from the beginning of the section. */
2292 elf_linker_section_pointers_t *linker_section_pointer;
2293
2294 /* Track dynamic relocs copied for this symbol. */
2295 struct ppc_elf_dyn_relocs *dyn_relocs;
2296
2297 /* Contexts in which symbol is used in the GOT (or TOC).
2298 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2299 corresponding relocs are encountered during check_relocs.
2300 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2301 indicate the corresponding GOT entry type is not needed. */
2302 #define TLS_GD 1 /* GD reloc. */
2303 #define TLS_LD 2 /* LD reloc. */
2304 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2305 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2306 #define TLS_TLS 16 /* Any TLS reloc. */
2307 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2308 char tls_mask;
2309
2310 /* Nonzero if we have seen a small data relocation referring to this
2311 symbol. */
2312 unsigned char has_sda_refs;
2313 };
2314
2315 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2316
2317 enum ppc_elf_plt_type {
2318 PLT_UNSET,
2319 PLT_OLD,
2320 PLT_NEW,
2321 PLT_VXWORKS
2322 };
2323
2324 /* PPC ELF linker hash table. */
2325
2326 struct ppc_elf_link_hash_table
2327 {
2328 struct elf_link_hash_table elf;
2329
2330 /* Short-cuts to get to dynamic linker sections. */
2331 asection *got;
2332 asection *relgot;
2333 asection *glink;
2334 asection *plt;
2335 asection *relplt;
2336 asection *dynbss;
2337 asection *relbss;
2338 asection *dynsbss;
2339 asection *relsbss;
2340 elf_linker_section_t sdata[2];
2341 asection *sbss;
2342
2343 /* Shortcut to .__tls_get_addr. */
2344 struct elf_link_hash_entry *tls_get_addr;
2345
2346 /* TLS local dynamic got entry handling. */
2347 union {
2348 bfd_signed_vma refcount;
2349 bfd_vma offset;
2350 } tlsld_got;
2351
2352 /* Offset of PltResolve function in glink. */
2353 bfd_vma glink_pltresolve;
2354
2355 /* Size of reserved GOT entries. */
2356 unsigned int got_header_size;
2357 /* Non-zero if allocating the header left a gap. */
2358 unsigned int got_gap;
2359
2360 /* The type of PLT we have chosen to use. */
2361 enum ppc_elf_plt_type plt_type;
2362
2363 /* Whether we can use the new PLT layout. */
2364 unsigned int can_use_new_plt:1;
2365
2366 /* Set if we should emit symbols for stubs. */
2367 unsigned int emit_stub_syms:1;
2368
2369 /* Small local sym to section mapping cache. */
2370 struct sym_sec_cache sym_sec;
2371
2372 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2373 asection *srelplt2;
2374
2375 /* The .got.plt section (VxWorks only)*/
2376 asection *sgotplt;
2377
2378 /* True if the target system is VxWorks. */
2379 int is_vxworks;
2380
2381 /* The size of PLT entries. */
2382 int plt_entry_size;
2383 /* The distance between adjacent PLT slots. */
2384 int plt_slot_size;
2385 /* The size of the first PLT entry. */
2386 int plt_initial_entry_size;
2387 };
2388
2389 /* Get the PPC ELF linker hash table from a link_info structure. */
2390
2391 #define ppc_elf_hash_table(p) \
2392 ((struct ppc_elf_link_hash_table *) (p)->hash)
2393
2394 /* Create an entry in a PPC ELF linker hash table. */
2395
2396 static struct bfd_hash_entry *
2397 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2398 struct bfd_hash_table *table,
2399 const char *string)
2400 {
2401 /* Allocate the structure if it has not already been allocated by a
2402 subclass. */
2403 if (entry == NULL)
2404 {
2405 entry = bfd_hash_allocate (table,
2406 sizeof (struct ppc_elf_link_hash_entry));
2407 if (entry == NULL)
2408 return entry;
2409 }
2410
2411 /* Call the allocation method of the superclass. */
2412 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2413 if (entry != NULL)
2414 {
2415 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2416 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2417 ppc_elf_hash_entry (entry)->tls_mask = 0;
2418 }
2419
2420 return entry;
2421 }
2422
2423 /* Create a PPC ELF linker hash table. */
2424
2425 static struct bfd_link_hash_table *
2426 ppc_elf_link_hash_table_create (bfd *abfd)
2427 {
2428 struct ppc_elf_link_hash_table *ret;
2429
2430 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2431 if (ret == NULL)
2432 return NULL;
2433
2434 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2435 ppc_elf_link_hash_newfunc,
2436 sizeof (struct ppc_elf_link_hash_entry)))
2437 {
2438 free (ret);
2439 return NULL;
2440 }
2441
2442 ret->elf.init_plt_refcount.refcount = 0;
2443 ret->elf.init_plt_refcount.glist = NULL;
2444 ret->elf.init_plt_offset.offset = 0;
2445 ret->elf.init_plt_offset.glist = NULL;
2446
2447 ret->sdata[0].name = ".sdata";
2448 ret->sdata[0].sym_name = "_SDA_BASE_";
2449 ret->sdata[0].bss_name = ".sbss";
2450
2451 ret->sdata[1].name = ".sdata2";
2452 ret->sdata[1].sym_name = "_SDA2_BASE_";
2453 ret->sdata[1].bss_name = ".sbss2";
2454
2455 ret->plt_entry_size = 12;
2456 ret->plt_slot_size = 8;
2457 ret->plt_initial_entry_size = 72;
2458
2459 ret->is_vxworks = 0;
2460
2461 return &ret->elf.root;
2462 }
2463
2464 /* Create .got and the related sections. */
2465
2466 static bfd_boolean
2467 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2468 {
2469 struct ppc_elf_link_hash_table *htab;
2470 asection *s;
2471 flagword flags;
2472
2473 if (!_bfd_elf_create_got_section (abfd, info))
2474 return FALSE;
2475
2476 htab = ppc_elf_hash_table (info);
2477 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2478 if (s == NULL)
2479 abort ();
2480
2481 if (htab->is_vxworks)
2482 {
2483 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2484 if (!htab->sgotplt)
2485 abort ();
2486 }
2487 else
2488 {
2489 /* The powerpc .got has a blrl instruction in it. Mark it
2490 executable. */
2491 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2492 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2493 if (!bfd_set_section_flags (abfd, s, flags))
2494 return FALSE;
2495 }
2496
2497 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2498 | SEC_LINKER_CREATED | SEC_READONLY);
2499 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2500 if (!htab->relgot
2501 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2502 return FALSE;
2503
2504 return TRUE;
2505 }
2506
2507 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2508 to output sections (just like _bfd_elf_create_dynamic_sections has
2509 to create .dynbss and .rela.bss). */
2510
2511 static bfd_boolean
2512 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2513 {
2514 struct ppc_elf_link_hash_table *htab;
2515 asection *s;
2516 flagword flags;
2517
2518 htab = ppc_elf_hash_table (info);
2519
2520 if (htab->got == NULL
2521 && !ppc_elf_create_got (abfd, info))
2522 return FALSE;
2523
2524 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2525 return FALSE;
2526
2527 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2528 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2529
2530 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2531 htab->glink = s;
2532 if (s == NULL
2533 || !bfd_set_section_alignment (abfd, s, 4))
2534 return FALSE;
2535
2536 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2537 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2538 SEC_ALLOC | SEC_LINKER_CREATED);
2539 htab->dynsbss = s;
2540 if (s == NULL)
2541 return FALSE;
2542
2543 if (! info->shared)
2544 {
2545 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2546 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2547 htab->relsbss = s;
2548 if (s == NULL
2549 || ! bfd_set_section_alignment (abfd, s, 2))
2550 return FALSE;
2551 }
2552
2553 if (htab->is_vxworks
2554 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2555 return FALSE;
2556
2557 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2558 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2559 if (s == NULL)
2560 abort ();
2561
2562 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2563 if (htab->plt_type == PLT_VXWORKS)
2564 /* The VxWorks PLT is a loaded section with contents. */
2565 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2566 return bfd_set_section_flags (abfd, s, flags);
2567 }
2568
2569 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2570
2571 static void
2572 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2573 struct elf_link_hash_entry *dir,
2574 struct elf_link_hash_entry *ind)
2575 {
2576 struct ppc_elf_link_hash_entry *edir, *eind;
2577
2578 edir = (struct ppc_elf_link_hash_entry *) dir;
2579 eind = (struct ppc_elf_link_hash_entry *) ind;
2580
2581 if (eind->dyn_relocs != NULL)
2582 {
2583 if (edir->dyn_relocs != NULL)
2584 {
2585 struct ppc_elf_dyn_relocs **pp;
2586 struct ppc_elf_dyn_relocs *p;
2587
2588 /* Add reloc counts against the indirect sym to the direct sym
2589 list. Merge any entries against the same section. */
2590 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2591 {
2592 struct ppc_elf_dyn_relocs *q;
2593
2594 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2595 if (q->sec == p->sec)
2596 {
2597 q->pc_count += p->pc_count;
2598 q->count += p->count;
2599 *pp = p->next;
2600 break;
2601 }
2602 if (q == NULL)
2603 pp = &p->next;
2604 }
2605 *pp = edir->dyn_relocs;
2606 }
2607
2608 edir->dyn_relocs = eind->dyn_relocs;
2609 eind->dyn_relocs = NULL;
2610 }
2611
2612 edir->tls_mask |= eind->tls_mask;
2613 edir->has_sda_refs |= eind->has_sda_refs;
2614
2615 /* If called to transfer flags for a weakdef during processing
2616 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2617 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2618 if (!(ELIMINATE_COPY_RELOCS
2619 && eind->elf.root.type != bfd_link_hash_indirect
2620 && edir->elf.dynamic_adjusted))
2621 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2622
2623 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2624 edir->elf.ref_regular |= eind->elf.ref_regular;
2625 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2626 edir->elf.needs_plt |= eind->elf.needs_plt;
2627
2628 /* If we were called to copy over info for a weak sym, that's all. */
2629 if (eind->elf.root.type != bfd_link_hash_indirect)
2630 return;
2631
2632 /* Copy over the GOT refcount entries that we may have already seen to
2633 the symbol which just became indirect. */
2634 edir->elf.got.refcount += eind->elf.got.refcount;
2635 eind->elf.got.refcount = 0;
2636
2637 /* And plt entries. */
2638 if (eind->elf.plt.plist != NULL)
2639 {
2640 if (edir->elf.plt.plist != NULL)
2641 {
2642 struct plt_entry **entp;
2643 struct plt_entry *ent;
2644
2645 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2646 {
2647 struct plt_entry *dent;
2648
2649 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2650 if (dent->sec == ent->sec && dent->addend == ent->addend)
2651 {
2652 dent->plt.refcount += ent->plt.refcount;
2653 *entp = ent->next;
2654 break;
2655 }
2656 if (dent == NULL)
2657 entp = &ent->next;
2658 }
2659 *entp = edir->elf.plt.plist;
2660 }
2661
2662 edir->elf.plt.plist = eind->elf.plt.plist;
2663 eind->elf.plt.plist = NULL;
2664 }
2665
2666 if (eind->elf.dynindx != -1)
2667 {
2668 if (edir->elf.dynindx != -1)
2669 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2670 edir->elf.dynstr_index);
2671 edir->elf.dynindx = eind->elf.dynindx;
2672 edir->elf.dynstr_index = eind->elf.dynstr_index;
2673 eind->elf.dynindx = -1;
2674 eind->elf.dynstr_index = 0;
2675 }
2676 }
2677
2678 /* Return 1 if target is one of ours. */
2679
2680 static bfd_boolean
2681 is_ppc_elf_target (const struct bfd_target *targ)
2682 {
2683 extern const bfd_target bfd_elf32_powerpc_vec;
2684 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2685 extern const bfd_target bfd_elf32_powerpcle_vec;
2686
2687 return (targ == &bfd_elf32_powerpc_vec
2688 || targ == &bfd_elf32_powerpc_vxworks_vec
2689 || targ == &bfd_elf32_powerpcle_vec);
2690 }
2691
2692 /* Hook called by the linker routine which adds symbols from an object
2693 file. We use it to put .comm items in .sbss, and not .bss. */
2694
2695 static bfd_boolean
2696 ppc_elf_add_symbol_hook (bfd *abfd,
2697 struct bfd_link_info *info,
2698 Elf_Internal_Sym *sym,
2699 const char **namep ATTRIBUTE_UNUSED,
2700 flagword *flagsp ATTRIBUTE_UNUSED,
2701 asection **secp,
2702 bfd_vma *valp)
2703 {
2704 if (sym->st_shndx == SHN_COMMON
2705 && !info->relocatable
2706 && sym->st_size <= elf_gp_size (abfd)
2707 && is_ppc_elf_target (info->hash->creator))
2708 {
2709 /* Common symbols less than or equal to -G nn bytes are automatically
2710 put into .sbss. */
2711 struct ppc_elf_link_hash_table *htab;
2712
2713 htab = ppc_elf_hash_table (info);
2714 if (htab->sbss == NULL)
2715 {
2716 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2717
2718 if (!htab->elf.dynobj)
2719 htab->elf.dynobj = abfd;
2720
2721 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2722 ".sbss",
2723 flags);
2724 if (htab->sbss == NULL)
2725 return FALSE;
2726 }
2727
2728 *secp = htab->sbss;
2729 *valp = sym->st_size;
2730 }
2731
2732 return TRUE;
2733 }
2734 \f
2735 static bfd_boolean
2736 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2737 elf_linker_section_t *lsect)
2738 {
2739 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2740 TRUE, FALSE, TRUE);
2741 if (lsect->sym == NULL)
2742 return FALSE;
2743 if (lsect->sym->root.type == bfd_link_hash_new)
2744 lsect->sym->non_elf = 0;
2745 lsect->sym->ref_regular = 1;
2746 return TRUE;
2747 }
2748
2749 /* Create a special linker section. */
2750
2751 static bfd_boolean
2752 ppc_elf_create_linker_section (bfd *abfd,
2753 struct bfd_link_info *info,
2754 flagword flags,
2755 elf_linker_section_t *lsect)
2756 {
2757 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2758 asection *s;
2759
2760 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2761 | SEC_LINKER_CREATED);
2762
2763 /* Record the first bfd that needs the special sections. */
2764 if (!htab->elf.dynobj)
2765 htab->elf.dynobj = abfd;
2766
2767 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2768 lsect->name,
2769 flags);
2770 if (s == NULL
2771 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2772 return FALSE;
2773 lsect->section = s;
2774
2775 return create_sdata_sym (htab, lsect);
2776 }
2777
2778 /* Find a linker generated pointer with a given addend and type. */
2779
2780 static elf_linker_section_pointers_t *
2781 elf_find_pointer_linker_section
2782 (elf_linker_section_pointers_t *linker_pointers,
2783 bfd_vma addend,
2784 elf_linker_section_t *lsect)
2785 {
2786 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2787 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2788 return linker_pointers;
2789
2790 return NULL;
2791 }
2792
2793 /* Allocate a pointer to live in a linker created section. */
2794
2795 static bfd_boolean
2796 elf_create_pointer_linker_section (bfd *abfd,
2797 elf_linker_section_t *lsect,
2798 struct elf_link_hash_entry *h,
2799 const Elf_Internal_Rela *rel)
2800 {
2801 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2802 elf_linker_section_pointers_t *linker_section_ptr;
2803 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2804 bfd_size_type amt;
2805
2806 BFD_ASSERT (lsect != NULL);
2807
2808 /* Is this a global symbol? */
2809 if (h != NULL)
2810 {
2811 struct ppc_elf_link_hash_entry *eh;
2812
2813 /* Has this symbol already been allocated? If so, our work is done. */
2814 eh = (struct ppc_elf_link_hash_entry *) h;
2815 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2816 rel->r_addend,
2817 lsect))
2818 return TRUE;
2819
2820 ptr_linker_section_ptr = &eh->linker_section_pointer;
2821 }
2822 else
2823 {
2824 /* Allocation of a pointer to a local symbol. */
2825 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2826
2827 /* Allocate a table to hold the local symbols if first time. */
2828 if (!ptr)
2829 {
2830 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2831
2832 amt = num_symbols;
2833 amt *= sizeof (elf_linker_section_pointers_t *);
2834 ptr = bfd_zalloc (abfd, amt);
2835
2836 if (!ptr)
2837 return FALSE;
2838
2839 elf_local_ptr_offsets (abfd) = ptr;
2840 }
2841
2842 /* Has this symbol already been allocated? If so, our work is done. */
2843 if (elf_find_pointer_linker_section (ptr[r_symndx],
2844 rel->r_addend,
2845 lsect))
2846 return TRUE;
2847
2848 ptr_linker_section_ptr = &ptr[r_symndx];
2849 }
2850
2851 /* Allocate space for a pointer in the linker section, and allocate
2852 a new pointer record from internal memory. */
2853 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2854 amt = sizeof (elf_linker_section_pointers_t);
2855 linker_section_ptr = bfd_alloc (abfd, amt);
2856
2857 if (!linker_section_ptr)
2858 return FALSE;
2859
2860 linker_section_ptr->next = *ptr_linker_section_ptr;
2861 linker_section_ptr->addend = rel->r_addend;
2862 linker_section_ptr->lsect = lsect;
2863 *ptr_linker_section_ptr = linker_section_ptr;
2864
2865 linker_section_ptr->offset = lsect->section->size;
2866 lsect->section->size += 4;
2867
2868 #ifdef DEBUG
2869 fprintf (stderr,
2870 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2871 lsect->name, (long) linker_section_ptr->offset,
2872 (long) lsect->section->size);
2873 #endif
2874
2875 return TRUE;
2876 }
2877
2878 static bfd_boolean
2879 update_local_sym_info (bfd *abfd,
2880 Elf_Internal_Shdr *symtab_hdr,
2881 unsigned long r_symndx,
2882 int tls_type)
2883 {
2884 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2885 char *local_got_tls_masks;
2886
2887 if (local_got_refcounts == NULL)
2888 {
2889 bfd_size_type size = symtab_hdr->sh_info;
2890
2891 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2892 local_got_refcounts = bfd_zalloc (abfd, size);
2893 if (local_got_refcounts == NULL)
2894 return FALSE;
2895 elf_local_got_refcounts (abfd) = local_got_refcounts;
2896 }
2897
2898 local_got_refcounts[r_symndx] += 1;
2899 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2900 local_got_tls_masks[r_symndx] |= tls_type;
2901 return TRUE;
2902 }
2903
2904 static bfd_boolean
2905 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2906 asection *sec, bfd_vma addend)
2907 {
2908 struct plt_entry *ent;
2909
2910 if (addend < 32768)
2911 sec = NULL;
2912 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2913 if (ent->sec == sec && ent->addend == addend)
2914 break;
2915 if (ent == NULL)
2916 {
2917 bfd_size_type amt = sizeof (*ent);
2918 ent = bfd_alloc (abfd, amt);
2919 if (ent == NULL)
2920 return FALSE;
2921 ent->next = h->plt.plist;
2922 ent->sec = sec;
2923 ent->addend = addend;
2924 ent->plt.refcount = 0;
2925 h->plt.plist = ent;
2926 }
2927 ent->plt.refcount += 1;
2928 return TRUE;
2929 }
2930
2931 static struct plt_entry *
2932 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2933 {
2934 struct plt_entry *ent;
2935
2936 if (addend < 32768)
2937 sec = NULL;
2938 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2939 if (ent->sec == sec && ent->addend == addend)
2940 break;
2941 return ent;
2942 }
2943
2944 static void
2945 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2946 {
2947 (*_bfd_error_handler)
2948 (_("%B: relocation %s cannot be used when making a shared object"),
2949 abfd,
2950 ppc_elf_howto_table[r_type]->name);
2951 bfd_set_error (bfd_error_bad_value);
2952 }
2953
2954 /* Look through the relocs for a section during the first phase, and
2955 allocate space in the global offset table or procedure linkage
2956 table. */
2957
2958 static bfd_boolean
2959 ppc_elf_check_relocs (bfd *abfd,
2960 struct bfd_link_info *info,
2961 asection *sec,
2962 const Elf_Internal_Rela *relocs)
2963 {
2964 struct ppc_elf_link_hash_table *htab;
2965 Elf_Internal_Shdr *symtab_hdr;
2966 struct elf_link_hash_entry **sym_hashes;
2967 const Elf_Internal_Rela *rel;
2968 const Elf_Internal_Rela *rel_end;
2969 asection *got2, *sreloc;
2970
2971 if (info->relocatable)
2972 return TRUE;
2973
2974 /* Don't do anything special with non-loaded, non-alloced sections.
2975 In particular, any relocs in such sections should not affect GOT
2976 and PLT reference counting (ie. we don't allow them to create GOT
2977 or PLT entries), there's no possibility or desire to optimize TLS
2978 relocs, and there's not much point in propagating relocs to shared
2979 libs that the dynamic linker won't relocate. */
2980 if ((sec->flags & SEC_ALLOC) == 0)
2981 return TRUE;
2982
2983 #ifdef DEBUG
2984 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2985 sec, abfd);
2986 #endif
2987
2988 /* Initialize howto table if not already done. */
2989 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2990 ppc_elf_howto_init ();
2991
2992 htab = ppc_elf_hash_table (info);
2993 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2994 sym_hashes = elf_sym_hashes (abfd);
2995 got2 = bfd_get_section_by_name (abfd, ".got2");
2996 sreloc = NULL;
2997
2998 rel_end = relocs + sec->reloc_count;
2999 for (rel = relocs; rel < rel_end; rel++)
3000 {
3001 unsigned long r_symndx;
3002 enum elf_ppc_reloc_type r_type;
3003 struct elf_link_hash_entry *h;
3004 int tls_type = 0;
3005
3006 r_symndx = ELF32_R_SYM (rel->r_info);
3007 if (r_symndx < symtab_hdr->sh_info)
3008 h = NULL;
3009 else
3010 {
3011 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3012 while (h->root.type == bfd_link_hash_indirect
3013 || h->root.type == bfd_link_hash_warning)
3014 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3015 }
3016
3017 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3018 This shows up in particular in an R_PPC_ADDR32 in the eabi
3019 startup code. */
3020 if (h != NULL
3021 && htab->got == NULL
3022 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3023 {
3024 if (htab->elf.dynobj == NULL)
3025 htab->elf.dynobj = abfd;
3026 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3027 return FALSE;
3028 BFD_ASSERT (h == htab->elf.hgot);
3029 }
3030
3031 r_type = ELF32_R_TYPE (rel->r_info);
3032 switch (r_type)
3033 {
3034 case R_PPC_GOT_TLSLD16:
3035 case R_PPC_GOT_TLSLD16_LO:
3036 case R_PPC_GOT_TLSLD16_HI:
3037 case R_PPC_GOT_TLSLD16_HA:
3038 htab->tlsld_got.refcount += 1;
3039 tls_type = TLS_TLS | TLS_LD;
3040 goto dogottls;
3041
3042 case R_PPC_GOT_TLSGD16:
3043 case R_PPC_GOT_TLSGD16_LO:
3044 case R_PPC_GOT_TLSGD16_HI:
3045 case R_PPC_GOT_TLSGD16_HA:
3046 tls_type = TLS_TLS | TLS_GD;
3047 goto dogottls;
3048
3049 case R_PPC_GOT_TPREL16:
3050 case R_PPC_GOT_TPREL16_LO:
3051 case R_PPC_GOT_TPREL16_HI:
3052 case R_PPC_GOT_TPREL16_HA:
3053 if (info->shared)
3054 info->flags |= DF_STATIC_TLS;
3055 tls_type = TLS_TLS | TLS_TPREL;
3056 goto dogottls;
3057
3058 case R_PPC_GOT_DTPREL16:
3059 case R_PPC_GOT_DTPREL16_LO:
3060 case R_PPC_GOT_DTPREL16_HI:
3061 case R_PPC_GOT_DTPREL16_HA:
3062 tls_type = TLS_TLS | TLS_DTPREL;
3063 dogottls:
3064 sec->has_tls_reloc = 1;
3065 /* Fall thru */
3066
3067 /* GOT16 relocations */
3068 case R_PPC_GOT16:
3069 case R_PPC_GOT16_LO:
3070 case R_PPC_GOT16_HI:
3071 case R_PPC_GOT16_HA:
3072 /* This symbol requires a global offset table entry. */
3073 if (htab->got == NULL)
3074 {
3075 if (htab->elf.dynobj == NULL)
3076 htab->elf.dynobj = abfd;
3077 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3078 return FALSE;
3079 }
3080 if (h != NULL)
3081 {
3082 h->got.refcount += 1;
3083 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3084 }
3085 else
3086 /* This is a global offset table entry for a local symbol. */
3087 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3088 return FALSE;
3089 break;
3090
3091 /* Indirect .sdata relocation. */
3092 case R_PPC_EMB_SDAI16:
3093 if (info->shared)
3094 {
3095 bad_shared_reloc (abfd, r_type);
3096 return FALSE;
3097 }
3098 if (htab->sdata[0].section == NULL
3099 && !ppc_elf_create_linker_section (abfd, info, 0,
3100 &htab->sdata[0]))
3101 return FALSE;
3102 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3103 h, rel))
3104 return FALSE;
3105 if (h != NULL)
3106 {
3107 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3108 h->non_got_ref = TRUE;
3109 }
3110 break;
3111
3112 /* Indirect .sdata2 relocation. */
3113 case R_PPC_EMB_SDA2I16:
3114 if (info->shared)
3115 {
3116 bad_shared_reloc (abfd, r_type);
3117 return FALSE;
3118 }
3119 if (htab->sdata[1].section == NULL
3120 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3121 &htab->sdata[1]))
3122 return FALSE;
3123 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3124 h, rel))
3125 return FALSE;
3126 if (h != NULL)
3127 {
3128 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3129 h->non_got_ref = TRUE;
3130 }
3131 break;
3132
3133 case R_PPC_SDAREL16:
3134 if (info->shared)
3135 {
3136 bad_shared_reloc (abfd, r_type);
3137 return FALSE;
3138 }
3139 if (htab->sdata[0].sym == NULL
3140 && !create_sdata_sym (htab, &htab->sdata[0]))
3141 return FALSE;
3142 if (h != NULL)
3143 {
3144 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3145 h->non_got_ref = TRUE;
3146 }
3147 break;
3148
3149 case R_PPC_EMB_SDA2REL:
3150 if (info->shared)
3151 {
3152 bad_shared_reloc (abfd, r_type);
3153 return FALSE;
3154 }
3155 if (htab->sdata[1].sym == NULL
3156 && !create_sdata_sym (htab, &htab->sdata[1]))
3157 return FALSE;
3158 if (h != NULL)
3159 {
3160 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3161 h->non_got_ref = TRUE;
3162 }
3163 break;
3164
3165 case R_PPC_EMB_SDA21:
3166 case R_PPC_EMB_RELSDA:
3167 if (info->shared)
3168 {
3169 bad_shared_reloc (abfd, r_type);
3170 return FALSE;
3171 }
3172 if (htab->sdata[0].sym == NULL
3173 && !create_sdata_sym (htab, &htab->sdata[0]))
3174 return FALSE;
3175 if (htab->sdata[1].sym == NULL
3176 && !create_sdata_sym (htab, &htab->sdata[1]))
3177 return FALSE;
3178 if (h != NULL)
3179 {
3180 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3181 h->non_got_ref = TRUE;
3182 }
3183 break;
3184
3185 case R_PPC_EMB_NADDR32:
3186 case R_PPC_EMB_NADDR16:
3187 case R_PPC_EMB_NADDR16_LO:
3188 case R_PPC_EMB_NADDR16_HI:
3189 case R_PPC_EMB_NADDR16_HA:
3190 if (info->shared)
3191 {
3192 bad_shared_reloc (abfd, r_type);
3193 return FALSE;
3194 }
3195 if (h != NULL)
3196 h->non_got_ref = TRUE;
3197 break;
3198
3199 case R_PPC_PLT32:
3200 case R_PPC_PLTREL24:
3201 case R_PPC_PLTREL32:
3202 case R_PPC_PLT16_LO:
3203 case R_PPC_PLT16_HI:
3204 case R_PPC_PLT16_HA:
3205 #ifdef DEBUG
3206 fprintf (stderr, "Reloc requires a PLT entry\n");
3207 #endif
3208 /* This symbol requires a procedure linkage table entry. We
3209 actually build the entry in finish_dynamic_symbol,
3210 because this might be a case of linking PIC code without
3211 linking in any dynamic objects, in which case we don't
3212 need to generate a procedure linkage table after all. */
3213
3214 if (h == NULL)
3215 {
3216 /* It does not make sense to have a procedure linkage
3217 table entry for a local symbol. */
3218 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3219 "local symbol"),
3220 abfd,
3221 sec,
3222 (long) rel->r_offset,
3223 ppc_elf_howto_table[r_type]->name);
3224 bfd_set_error (bfd_error_bad_value);
3225 return FALSE;
3226 }
3227 else
3228 {
3229 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3230
3231 h->needs_plt = 1;
3232 if (!update_plt_info (abfd, h, got2, addend))
3233 return FALSE;
3234 }
3235 break;
3236
3237 /* The following relocations don't need to propagate the
3238 relocation if linking a shared object since they are
3239 section relative. */
3240 case R_PPC_SECTOFF:
3241 case R_PPC_SECTOFF_LO:
3242 case R_PPC_SECTOFF_HI:
3243 case R_PPC_SECTOFF_HA:
3244 case R_PPC_DTPREL16:
3245 case R_PPC_DTPREL16_LO:
3246 case R_PPC_DTPREL16_HI:
3247 case R_PPC_DTPREL16_HA:
3248 case R_PPC_TOC16:
3249 break;
3250
3251 case R_PPC_REL16:
3252 case R_PPC_REL16_LO:
3253 case R_PPC_REL16_HI:
3254 case R_PPC_REL16_HA:
3255 htab->can_use_new_plt = 1;
3256 break;
3257
3258 /* These are just markers. */
3259 case R_PPC_TLS:
3260 case R_PPC_EMB_MRKREF:
3261 case R_PPC_NONE:
3262 case R_PPC_max:
3263 break;
3264
3265 /* These should only appear in dynamic objects. */
3266 case R_PPC_COPY:
3267 case R_PPC_GLOB_DAT:
3268 case R_PPC_JMP_SLOT:
3269 case R_PPC_RELATIVE:
3270 break;
3271
3272 /* These aren't handled yet. We'll report an error later. */
3273 case R_PPC_ADDR30:
3274 case R_PPC_EMB_RELSEC16:
3275 case R_PPC_EMB_RELST_LO:
3276 case R_PPC_EMB_RELST_HI:
3277 case R_PPC_EMB_RELST_HA:
3278 case R_PPC_EMB_BIT_FLD:
3279 break;
3280
3281 /* This refers only to functions defined in the shared library. */
3282 case R_PPC_LOCAL24PC:
3283 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3284 htab->plt_type = PLT_OLD;
3285 break;
3286
3287 /* This relocation describes the C++ object vtable hierarchy.
3288 Reconstruct it for later use during GC. */
3289 case R_PPC_GNU_VTINHERIT:
3290 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3291 return FALSE;
3292 break;
3293
3294 /* This relocation describes which C++ vtable entries are actually
3295 used. Record for later use during GC. */
3296 case R_PPC_GNU_VTENTRY:
3297 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3298 return FALSE;
3299 break;
3300
3301 /* We shouldn't really be seeing these. */
3302 case R_PPC_TPREL32:
3303 if (info->shared)
3304 info->flags |= DF_STATIC_TLS;
3305 goto dodyn;
3306
3307 /* Nor these. */
3308 case R_PPC_DTPMOD32:
3309 case R_PPC_DTPREL32:
3310 goto dodyn;
3311
3312 case R_PPC_TPREL16:
3313 case R_PPC_TPREL16_LO:
3314 case R_PPC_TPREL16_HI:
3315 case R_PPC_TPREL16_HA:
3316 if (info->shared)
3317 info->flags |= DF_STATIC_TLS;
3318 goto dodyn;
3319
3320 case R_PPC_REL32:
3321 if (h == NULL
3322 && got2 != NULL
3323 && (sec->flags & SEC_CODE) != 0
3324 && (info->shared || info->pie)
3325 && htab->plt_type == PLT_UNSET)
3326 {
3327 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3328 the start of a function, which assembles to a REL32
3329 reference to .got2. If we detect one of these, then
3330 force the old PLT layout because the linker cannot
3331 reliably deduce the GOT pointer value needed for
3332 PLT call stubs. */
3333 asection *s;
3334
3335 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3336 r_symndx);
3337 if (s == got2)
3338 htab->plt_type = PLT_OLD;
3339 }
3340 if (h == NULL || h == htab->elf.hgot)
3341 break;
3342 goto dodyn1;
3343
3344 case R_PPC_REL24:
3345 case R_PPC_REL14:
3346 case R_PPC_REL14_BRTAKEN:
3347 case R_PPC_REL14_BRNTAKEN:
3348 if (h == NULL)
3349 break;
3350 if (h == htab->elf.hgot)
3351 {
3352 if (htab->plt_type == PLT_UNSET)
3353 htab->plt_type = PLT_OLD;
3354 break;
3355 }
3356 /* fall through */
3357
3358 case R_PPC_ADDR32:
3359 case R_PPC_ADDR24:
3360 case R_PPC_ADDR16:
3361 case R_PPC_ADDR16_LO:
3362 case R_PPC_ADDR16_HI:
3363 case R_PPC_ADDR16_HA:
3364 case R_PPC_ADDR14:
3365 case R_PPC_ADDR14_BRTAKEN:
3366 case R_PPC_ADDR14_BRNTAKEN:
3367 case R_PPC_UADDR32:
3368 case R_PPC_UADDR16:
3369 dodyn1:
3370 if (h != NULL && !info->shared)
3371 {
3372 /* We may need a plt entry if the symbol turns out to be
3373 a function defined in a dynamic object. */
3374 if (!update_plt_info (abfd, h, NULL, 0))
3375 return FALSE;
3376
3377 /* We may need a copy reloc too. */
3378 h->non_got_ref = 1;
3379 }
3380
3381 dodyn:
3382 /* If we are creating a shared library, and this is a reloc
3383 against a global symbol, or a non PC relative reloc
3384 against a local symbol, then we need to copy the reloc
3385 into the shared library. However, if we are linking with
3386 -Bsymbolic, we do not need to copy a reloc against a
3387 global symbol which is defined in an object we are
3388 including in the link (i.e., DEF_REGULAR is set). At
3389 this point we have not seen all the input files, so it is
3390 possible that DEF_REGULAR is not set now but will be set
3391 later (it is never cleared). In case of a weak definition,
3392 DEF_REGULAR may be cleared later by a strong definition in
3393 a shared library. We account for that possibility below by
3394 storing information in the dyn_relocs field of the hash
3395 table entry. A similar situation occurs when creating
3396 shared libraries and symbol visibility changes render the
3397 symbol local.
3398
3399 If on the other hand, we are creating an executable, we
3400 may need to keep relocations for symbols satisfied by a
3401 dynamic library if we manage to avoid copy relocs for the
3402 symbol. */
3403 if ((info->shared
3404 && (MUST_BE_DYN_RELOC (r_type)
3405 || (h != NULL
3406 && (! info->symbolic
3407 || h->root.type == bfd_link_hash_defweak
3408 || !h->def_regular))))
3409 || (ELIMINATE_COPY_RELOCS
3410 && !info->shared
3411 && h != NULL
3412 && (h->root.type == bfd_link_hash_defweak
3413 || !h->def_regular)))
3414 {
3415 struct ppc_elf_dyn_relocs *p;
3416 struct ppc_elf_dyn_relocs **head;
3417
3418 #ifdef DEBUG
3419 fprintf (stderr,
3420 "ppc_elf_check_relocs needs to "
3421 "create relocation for %s\n",
3422 (h && h->root.root.string
3423 ? h->root.root.string : "<unknown>"));
3424 #endif
3425 if (sreloc == NULL)
3426 {
3427 const char *name;
3428
3429 name = (bfd_elf_string_from_elf_section
3430 (abfd,
3431 elf_elfheader (abfd)->e_shstrndx,
3432 elf_section_data (sec)->rel_hdr.sh_name));
3433 if (name == NULL)
3434 return FALSE;
3435
3436 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3437 && strcmp (bfd_get_section_name (abfd, sec),
3438 name + 5) == 0);
3439
3440 if (htab->elf.dynobj == NULL)
3441 htab->elf.dynobj = abfd;
3442 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3443 if (sreloc == NULL)
3444 {
3445 flagword flags;
3446
3447 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3448 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3449 | SEC_ALLOC | SEC_LOAD);
3450 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3451 name,
3452 flags);
3453 if (sreloc == NULL
3454 || ! bfd_set_section_alignment (htab->elf.dynobj,
3455 sreloc, 2))
3456 return FALSE;
3457 }
3458 elf_section_data (sec)->sreloc = sreloc;
3459 }
3460
3461 /* If this is a global symbol, we count the number of
3462 relocations we need for this symbol. */
3463 if (h != NULL)
3464 {
3465 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3466 }
3467 else
3468 {
3469 /* Track dynamic relocs needed for local syms too.
3470 We really need local syms available to do this
3471 easily. Oh well. */
3472
3473 asection *s;
3474 void *vpp;
3475
3476 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3477 sec, r_symndx);
3478 if (s == NULL)
3479 return FALSE;
3480
3481 vpp = &elf_section_data (s)->local_dynrel;
3482 head = (struct ppc_elf_dyn_relocs **) vpp;
3483 }
3484
3485 p = *head;
3486 if (p == NULL || p->sec != sec)
3487 {
3488 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3489 if (p == NULL)
3490 return FALSE;
3491 p->next = *head;
3492 *head = p;
3493 p->sec = sec;
3494 p->count = 0;
3495 p->pc_count = 0;
3496 }
3497
3498 p->count += 1;
3499 if (!MUST_BE_DYN_RELOC (r_type))
3500 p->pc_count += 1;
3501 }
3502
3503 break;
3504 }
3505 }
3506
3507 return TRUE;
3508 }
3509 \f
3510 /* Merge backend specific data from an object file to the output
3511 object file when linking. */
3512
3513 static bfd_boolean
3514 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3515 {
3516 flagword old_flags;
3517 flagword new_flags;
3518 bfd_boolean error;
3519
3520 if (!is_ppc_elf_target (ibfd->xvec)
3521 || !is_ppc_elf_target (obfd->xvec))
3522 return TRUE;
3523
3524 /* Check if we have the same endianess. */
3525 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3526 return FALSE;
3527
3528 new_flags = elf_elfheader (ibfd)->e_flags;
3529 old_flags = elf_elfheader (obfd)->e_flags;
3530 if (!elf_flags_init (obfd))
3531 {
3532 /* First call, no flags set. */
3533 elf_flags_init (obfd) = TRUE;
3534 elf_elfheader (obfd)->e_flags = new_flags;
3535 }
3536
3537 /* Compatible flags are ok. */
3538 else if (new_flags == old_flags)
3539 ;
3540
3541 /* Incompatible flags. */
3542 else
3543 {
3544 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3545 to be linked with either. */
3546 error = FALSE;
3547 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3548 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3549 {
3550 error = TRUE;
3551 (*_bfd_error_handler)
3552 (_("%B: compiled with -mrelocatable and linked with "
3553 "modules compiled normally"), ibfd);
3554 }
3555 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3556 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3557 {
3558 error = TRUE;
3559 (*_bfd_error_handler)
3560 (_("%B: compiled normally and linked with "
3561 "modules compiled with -mrelocatable"), ibfd);
3562 }
3563
3564 /* The output is -mrelocatable-lib iff both the input files are. */
3565 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3566 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3567
3568 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3569 but each input file is either -mrelocatable or -mrelocatable-lib. */
3570 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3571 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3572 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3573 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3574
3575 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3576 any module uses it. */
3577 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3578
3579 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3580 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3581
3582 /* Warn about any other mismatches. */
3583 if (new_flags != old_flags)
3584 {
3585 error = TRUE;
3586 (*_bfd_error_handler)
3587 (_("%B: uses different e_flags (0x%lx) fields "
3588 "than previous modules (0x%lx)"),
3589 ibfd, (long) new_flags, (long) old_flags);
3590 }
3591
3592 if (error)
3593 {
3594 bfd_set_error (bfd_error_bad_value);
3595 return FALSE;
3596 }
3597 }
3598
3599 return TRUE;
3600 }
3601 \f
3602 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3603 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3604 int
3605 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3606 struct bfd_link_info *info,
3607 int force_old_plt,
3608 int emit_stub_syms)
3609 {
3610 struct ppc_elf_link_hash_table *htab;
3611 flagword flags;
3612
3613 htab = ppc_elf_hash_table (info);
3614
3615 if (htab->plt_type == PLT_UNSET)
3616 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3617 ? PLT_OLD : PLT_NEW);
3618
3619 htab->emit_stub_syms = emit_stub_syms;
3620
3621 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3622
3623 if (htab->plt_type == PLT_NEW)
3624 {
3625 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3626 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3627
3628 /* The new PLT is a loaded section. */
3629 if (htab->plt != NULL
3630 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3631 return -1;
3632
3633 /* The new GOT is not executable. */
3634 if (htab->got != NULL
3635 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3636 return -1;
3637 }
3638 else
3639 {
3640 /* Stop an unused .glink section from affecting .text alignment. */
3641 if (htab->glink != NULL
3642 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3643 return -1;
3644 }
3645 return htab->plt_type == PLT_NEW;
3646 }
3647 \f
3648 /* Return the section that should be marked against GC for a given
3649 relocation. */
3650
3651 static asection *
3652 ppc_elf_gc_mark_hook (asection *sec,
3653 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3654 Elf_Internal_Rela *rel,
3655 struct elf_link_hash_entry *h,
3656 Elf_Internal_Sym *sym)
3657 {
3658 if (h != NULL)
3659 {
3660 switch (ELF32_R_TYPE (rel->r_info))
3661 {
3662 case R_PPC_GNU_VTINHERIT:
3663 case R_PPC_GNU_VTENTRY:
3664 break;
3665
3666 default:
3667 switch (h->root.type)
3668 {
3669 case bfd_link_hash_defined:
3670 case bfd_link_hash_defweak:
3671 return h->root.u.def.section;
3672
3673 case bfd_link_hash_common:
3674 return h->root.u.c.p->section;
3675
3676 default:
3677 break;
3678 }
3679 }
3680 }
3681 else
3682 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3683
3684 return NULL;
3685 }
3686
3687 /* Update the got, plt and dynamic reloc reference counts for the
3688 section being removed. */
3689
3690 static bfd_boolean
3691 ppc_elf_gc_sweep_hook (bfd *abfd,
3692 struct bfd_link_info *info,
3693 asection *sec,
3694 const Elf_Internal_Rela *relocs)
3695 {
3696 struct ppc_elf_link_hash_table *htab;
3697 Elf_Internal_Shdr *symtab_hdr;
3698 struct elf_link_hash_entry **sym_hashes;
3699 bfd_signed_vma *local_got_refcounts;
3700 const Elf_Internal_Rela *rel, *relend;
3701 asection *got2;
3702
3703 if ((sec->flags & SEC_ALLOC) == 0)
3704 return TRUE;
3705
3706 elf_section_data (sec)->local_dynrel = NULL;
3707
3708 htab = ppc_elf_hash_table (info);
3709 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3710 sym_hashes = elf_sym_hashes (abfd);
3711 local_got_refcounts = elf_local_got_refcounts (abfd);
3712 got2 = bfd_get_section_by_name (abfd, ".got2");
3713
3714 relend = relocs + sec->reloc_count;
3715 for (rel = relocs; rel < relend; rel++)
3716 {
3717 unsigned long r_symndx;
3718 enum elf_ppc_reloc_type r_type;
3719 struct elf_link_hash_entry *h = NULL;
3720
3721 r_symndx = ELF32_R_SYM (rel->r_info);
3722 if (r_symndx >= symtab_hdr->sh_info)
3723 {
3724 struct ppc_elf_dyn_relocs **pp, *p;
3725 struct ppc_elf_link_hash_entry *eh;
3726
3727 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3728 while (h->root.type == bfd_link_hash_indirect
3729 || h->root.type == bfd_link_hash_warning)
3730 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3731 eh = (struct ppc_elf_link_hash_entry *) h;
3732
3733 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3734 if (p->sec == sec)
3735 {
3736 /* Everything must go for SEC. */
3737 *pp = p->next;
3738 break;
3739 }
3740 }
3741
3742 r_type = ELF32_R_TYPE (rel->r_info);
3743 switch (r_type)
3744 {
3745 case R_PPC_GOT_TLSLD16:
3746 case R_PPC_GOT_TLSLD16_LO:
3747 case R_PPC_GOT_TLSLD16_HI:
3748 case R_PPC_GOT_TLSLD16_HA:
3749 htab->tlsld_got.refcount -= 1;
3750 /* Fall thru */
3751
3752 case R_PPC_GOT_TLSGD16:
3753 case R_PPC_GOT_TLSGD16_LO:
3754 case R_PPC_GOT_TLSGD16_HI:
3755 case R_PPC_GOT_TLSGD16_HA:
3756 case R_PPC_GOT_TPREL16:
3757 case R_PPC_GOT_TPREL16_LO:
3758 case R_PPC_GOT_TPREL16_HI:
3759 case R_PPC_GOT_TPREL16_HA:
3760 case R_PPC_GOT_DTPREL16:
3761 case R_PPC_GOT_DTPREL16_LO:
3762 case R_PPC_GOT_DTPREL16_HI:
3763 case R_PPC_GOT_DTPREL16_HA:
3764 case R_PPC_GOT16:
3765 case R_PPC_GOT16_LO:
3766 case R_PPC_GOT16_HI:
3767 case R_PPC_GOT16_HA:
3768 if (h != NULL)
3769 {
3770 if (h->got.refcount > 0)
3771 h->got.refcount--;
3772 }
3773 else if (local_got_refcounts != NULL)
3774 {
3775 if (local_got_refcounts[r_symndx] > 0)
3776 local_got_refcounts[r_symndx]--;
3777 }
3778 break;
3779
3780 case R_PPC_REL24:
3781 case R_PPC_REL14:
3782 case R_PPC_REL14_BRTAKEN:
3783 case R_PPC_REL14_BRNTAKEN:
3784 case R_PPC_REL32:
3785 if (h == NULL || h == htab->elf.hgot)
3786 break;
3787 /* Fall thru */
3788
3789 case R_PPC_ADDR32:
3790 case R_PPC_ADDR24:
3791 case R_PPC_ADDR16:
3792 case R_PPC_ADDR16_LO:
3793 case R_PPC_ADDR16_HI:
3794 case R_PPC_ADDR16_HA:
3795 case R_PPC_ADDR14:
3796 case R_PPC_ADDR14_BRTAKEN:
3797 case R_PPC_ADDR14_BRNTAKEN:
3798 case R_PPC_UADDR32:
3799 case R_PPC_UADDR16:
3800 if (info->shared)
3801 break;
3802
3803 case R_PPC_PLT32:
3804 case R_PPC_PLTREL24:
3805 case R_PPC_PLTREL32:
3806 case R_PPC_PLT16_LO:
3807 case R_PPC_PLT16_HI:
3808 case R_PPC_PLT16_HA:
3809 if (h != NULL)
3810 {
3811 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3812 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3813 if (ent->plt.refcount > 0)
3814 ent->plt.refcount -= 1;
3815 }
3816 break;
3817
3818 default:
3819 break;
3820 }
3821 }
3822 return TRUE;
3823 }
3824 \f
3825 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3826
3827 asection *
3828 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3829 {
3830 struct ppc_elf_link_hash_table *htab;
3831
3832 htab = ppc_elf_hash_table (info);
3833 if (htab->plt_type == PLT_NEW
3834 && htab->plt != NULL
3835 && htab->plt->output_section != NULL)
3836 {
3837 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3838 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3839 }
3840
3841 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3842 FALSE, FALSE, TRUE);
3843 return _bfd_elf_tls_setup (obfd, info);
3844 }
3845
3846 /* Run through all the TLS relocs looking for optimization
3847 opportunities. */
3848
3849 bfd_boolean
3850 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3851 struct bfd_link_info *info)
3852 {
3853 bfd *ibfd;
3854 asection *sec;
3855 struct ppc_elf_link_hash_table *htab;
3856
3857 if (info->relocatable || info->shared)
3858 return TRUE;
3859
3860 htab = ppc_elf_hash_table (info);
3861 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3862 {
3863 Elf_Internal_Sym *locsyms = NULL;
3864 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3865
3866 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3867 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3868 {
3869 Elf_Internal_Rela *relstart, *rel, *relend;
3870 int expecting_tls_get_addr;
3871
3872 /* Read the relocations. */
3873 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3874 info->keep_memory);
3875 if (relstart == NULL)
3876 return FALSE;
3877
3878 expecting_tls_get_addr = 0;
3879 relend = relstart + sec->reloc_count;
3880 for (rel = relstart; rel < relend; rel++)
3881 {
3882 enum elf_ppc_reloc_type r_type;
3883 unsigned long r_symndx;
3884 struct elf_link_hash_entry *h = NULL;
3885 char *tls_mask;
3886 char tls_set, tls_clear;
3887 bfd_boolean is_local;
3888
3889 r_symndx = ELF32_R_SYM (rel->r_info);
3890 if (r_symndx >= symtab_hdr->sh_info)
3891 {
3892 struct elf_link_hash_entry **sym_hashes;
3893
3894 sym_hashes = elf_sym_hashes (ibfd);
3895 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3896 while (h->root.type == bfd_link_hash_indirect
3897 || h->root.type == bfd_link_hash_warning)
3898 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3899 }
3900
3901 is_local = FALSE;
3902 if (h == NULL
3903 || !h->def_dynamic)
3904 is_local = TRUE;
3905
3906 r_type = ELF32_R_TYPE (rel->r_info);
3907 switch (r_type)
3908 {
3909 case R_PPC_GOT_TLSLD16:
3910 case R_PPC_GOT_TLSLD16_LO:
3911 case R_PPC_GOT_TLSLD16_HI:
3912 case R_PPC_GOT_TLSLD16_HA:
3913 /* These relocs should never be against a symbol
3914 defined in a shared lib. Leave them alone if
3915 that turns out to be the case. */
3916 expecting_tls_get_addr = 0;
3917 htab->tlsld_got.refcount -= 1;
3918 if (!is_local)
3919 continue;
3920
3921 /* LD -> LE */
3922 tls_set = 0;
3923 tls_clear = TLS_LD;
3924 expecting_tls_get_addr = 1;
3925 break;
3926
3927 case R_PPC_GOT_TLSGD16:
3928 case R_PPC_GOT_TLSGD16_LO:
3929 case R_PPC_GOT_TLSGD16_HI:
3930 case R_PPC_GOT_TLSGD16_HA:
3931 if (is_local)
3932 /* GD -> LE */
3933 tls_set = 0;
3934 else
3935 /* GD -> IE */
3936 tls_set = TLS_TLS | TLS_TPRELGD;
3937 tls_clear = TLS_GD;
3938 expecting_tls_get_addr = 1;
3939 break;
3940
3941 case R_PPC_GOT_TPREL16:
3942 case R_PPC_GOT_TPREL16_LO:
3943 case R_PPC_GOT_TPREL16_HI:
3944 case R_PPC_GOT_TPREL16_HA:
3945 expecting_tls_get_addr = 0;
3946 if (is_local)
3947 {
3948 /* IE -> LE */
3949 tls_set = 0;
3950 tls_clear = TLS_TPREL;
3951 break;
3952 }
3953 else
3954 continue;
3955
3956 case R_PPC_REL14:
3957 case R_PPC_REL14_BRTAKEN:
3958 case R_PPC_REL14_BRNTAKEN:
3959 case R_PPC_REL24:
3960 if (expecting_tls_get_addr
3961 && h != NULL
3962 && h == htab->tls_get_addr)
3963 {
3964 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3965 if (ent != NULL && ent->plt.refcount > 0)
3966 ent->plt.refcount -= 1;
3967 }
3968 expecting_tls_get_addr = 0;
3969 continue;
3970
3971 default:
3972 expecting_tls_get_addr = 0;
3973 continue;
3974 }
3975
3976 if (h != NULL)
3977 {
3978 if (tls_set == 0)
3979 {
3980 /* We managed to get rid of a got entry. */
3981 if (h->got.refcount > 0)
3982 h->got.refcount -= 1;
3983 }
3984 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3985 }
3986 else
3987 {
3988 Elf_Internal_Sym *sym;
3989 bfd_signed_vma *lgot_refs;
3990 char *lgot_masks;
3991
3992 if (locsyms == NULL)
3993 {
3994 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3995 if (locsyms == NULL)
3996 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3997 symtab_hdr->sh_info,
3998 0, NULL, NULL, NULL);
3999 if (locsyms == NULL)
4000 {
4001 if (elf_section_data (sec)->relocs != relstart)
4002 free (relstart);
4003 return FALSE;
4004 }
4005 }
4006 sym = locsyms + r_symndx;
4007 lgot_refs = elf_local_got_refcounts (ibfd);
4008 if (lgot_refs == NULL)
4009 abort ();
4010 if (tls_set == 0)
4011 {
4012 /* We managed to get rid of a got entry. */
4013 if (lgot_refs[r_symndx] > 0)
4014 lgot_refs[r_symndx] -= 1;
4015 }
4016 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4017 tls_mask = &lgot_masks[r_symndx];
4018 }
4019
4020 *tls_mask |= tls_set;
4021 *tls_mask &= ~tls_clear;
4022 }
4023
4024 if (elf_section_data (sec)->relocs != relstart)
4025 free (relstart);
4026 }
4027
4028 if (locsyms != NULL
4029 && (symtab_hdr->contents != (unsigned char *) locsyms))
4030 {
4031 if (!info->keep_memory)
4032 free (locsyms);
4033 else
4034 symtab_hdr->contents = (unsigned char *) locsyms;
4035 }
4036 }
4037 return TRUE;
4038 }
4039 \f
4040 /* Adjust a symbol defined by a dynamic object and referenced by a
4041 regular object. The current definition is in some section of the
4042 dynamic object, but we're not including those sections. We have to
4043 change the definition to something the rest of the link can
4044 understand. */
4045
4046 static bfd_boolean
4047 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4048 struct elf_link_hash_entry *h)
4049 {
4050 struct ppc_elf_link_hash_table *htab;
4051 asection *s;
4052 unsigned int power_of_two;
4053
4054 #ifdef DEBUG
4055 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4056 h->root.root.string);
4057 #endif
4058
4059 /* Make sure we know what is going on here. */
4060 htab = ppc_elf_hash_table (info);
4061 BFD_ASSERT (htab->elf.dynobj != NULL
4062 && (h->needs_plt
4063 || h->u.weakdef != NULL
4064 || (h->def_dynamic
4065 && h->ref_regular
4066 && !h->def_regular)));
4067
4068 /* Deal with function syms. */
4069 if (h->type == STT_FUNC
4070 || h->needs_plt)
4071 {
4072 /* Clear procedure linkage table information for any symbol that
4073 won't need a .plt entry. */
4074 struct plt_entry *ent;
4075 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4076 if (ent->plt.refcount > 0)
4077 break;
4078 if (ent == NULL
4079 || SYMBOL_CALLS_LOCAL (info, h)
4080 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4081 && h->root.type == bfd_link_hash_undefweak))
4082 {
4083 /* A PLT entry is not required/allowed when:
4084
4085 1. We are not using ld.so; because then the PLT entry
4086 can't be set up, so we can't use one. In this case,
4087 ppc_elf_adjust_dynamic_symbol won't even be called.
4088
4089 2. GC has rendered the entry unused.
4090
4091 3. We know for certain that a call to this symbol
4092 will go to this object, or will remain undefined. */
4093 h->plt.plist = NULL;
4094 h->needs_plt = 0;
4095 }
4096 return TRUE;
4097 }
4098 else
4099 h->plt.plist = NULL;
4100
4101 /* If this is a weak symbol, and there is a real definition, the
4102 processor independent code will have arranged for us to see the
4103 real definition first, and we can just use the same value. */
4104 if (h->u.weakdef != NULL)
4105 {
4106 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4107 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4108 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4109 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4110 if (ELIMINATE_COPY_RELOCS)
4111 h->non_got_ref = h->u.weakdef->non_got_ref;
4112 return TRUE;
4113 }
4114
4115 /* This is a reference to a symbol defined by a dynamic object which
4116 is not a function. */
4117
4118 /* If we are creating a shared library, we must presume that the
4119 only references to the symbol are via the global offset table.
4120 For such cases we need not do anything here; the relocations will
4121 be handled correctly by relocate_section. */
4122 if (info->shared)
4123 return TRUE;
4124
4125 /* If there are no references to this symbol that do not use the
4126 GOT, we don't need to generate a copy reloc. */
4127 if (!h->non_got_ref)
4128 return TRUE;
4129
4130 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4131 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4132 do this if there are any small data relocations. */
4133 if (ELIMINATE_COPY_RELOCS
4134 && !ppc_elf_hash_entry (h)->has_sda_refs)
4135 {
4136 struct ppc_elf_dyn_relocs *p;
4137 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4138 {
4139 s = p->sec->output_section;
4140 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4141 break;
4142 }
4143
4144 if (p == NULL)
4145 {
4146 h->non_got_ref = 0;
4147 return TRUE;
4148 }
4149 }
4150
4151 if (h->size == 0)
4152 {
4153 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4154 h->root.root.string);
4155 return TRUE;
4156 }
4157
4158 /* We must allocate the symbol in our .dynbss section, which will
4159 become part of the .bss section of the executable. There will be
4160 an entry for this symbol in the .dynsym section. The dynamic
4161 object will contain position independent code, so all references
4162 from the dynamic object to this symbol will go through the global
4163 offset table. The dynamic linker will use the .dynsym entry to
4164 determine the address it must put in the global offset table, so
4165 both the dynamic object and the regular object will refer to the
4166 same memory location for the variable.
4167
4168 Of course, if the symbol is referenced using SDAREL relocs, we
4169 must instead allocate it in .sbss. */
4170
4171 if (ppc_elf_hash_entry (h)->has_sda_refs)
4172 s = htab->dynsbss;
4173 else
4174 s = htab->dynbss;
4175 BFD_ASSERT (s != NULL);
4176
4177 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4178 copy the initial value out of the dynamic object and into the
4179 runtime process image. We need to remember the offset into the
4180 .rela.bss section we are going to use. */
4181 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4182 {
4183 asection *srel;
4184
4185 if (ppc_elf_hash_entry (h)->has_sda_refs)
4186 srel = htab->relsbss;
4187 else
4188 srel = htab->relbss;
4189 BFD_ASSERT (srel != NULL);
4190 srel->size += sizeof (Elf32_External_Rela);
4191 h->needs_copy = 1;
4192 }
4193
4194 /* We need to figure out the alignment required for this symbol. I
4195 have no idea how ELF linkers handle this. */
4196 power_of_two = bfd_log2 (h->size);
4197 if (power_of_two > 4)
4198 power_of_two = 4;
4199
4200 /* Apply the required alignment. */
4201 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4202 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4203 {
4204 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4205 return FALSE;
4206 }
4207
4208 /* Define the symbol as being at this point in the section. */
4209 h->root.u.def.section = s;
4210 h->root.u.def.value = s->size;
4211
4212 /* Increment the section size to make room for the symbol. */
4213 s->size += h->size;
4214
4215 return TRUE;
4216 }
4217 \f
4218 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4219 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4220 specifying the addend on the plt relocation. For -fpic code, the sym
4221 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4222 xxxxxxxx.got2.plt_pic32.<callee>. */
4223
4224 static bfd_boolean
4225 add_stub_sym (struct plt_entry *ent,
4226 struct elf_link_hash_entry *h,
4227 struct bfd_link_info *info)
4228 {
4229 struct elf_link_hash_entry *sh;
4230 size_t len1, len2, len3;
4231 char *name;
4232 const char *stub;
4233 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4234
4235 if (info->shared || info->pie)
4236 stub = ".plt_pic32.";
4237 else
4238 stub = ".plt_call32.";
4239
4240 len1 = strlen (h->root.root.string);
4241 len2 = strlen (stub);
4242 len3 = 0;
4243 if (ent->sec)
4244 len3 = strlen (ent->sec->name);
4245 name = bfd_malloc (len1 + len2 + len3 + 9);
4246 if (name == NULL)
4247 return FALSE;
4248 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4249 if (ent->sec)
4250 memcpy (name + 8, ent->sec->name, len3);
4251 memcpy (name + 8 + len3, stub, len2);
4252 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4253 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4254 if (sh == NULL)
4255 return FALSE;
4256 if (sh->root.type == bfd_link_hash_new)
4257 {
4258 sh->root.type = bfd_link_hash_defined;
4259 sh->root.u.def.section = htab->glink;
4260 sh->root.u.def.value = ent->glink_offset;
4261 sh->ref_regular = 1;
4262 sh->def_regular = 1;
4263 sh->ref_regular_nonweak = 1;
4264 sh->forced_local = 1;
4265 sh->non_elf = 0;
4266 }
4267 return TRUE;
4268 }
4269
4270 /* Allocate NEED contiguous space in .got, and return the offset.
4271 Handles allocation of the got header when crossing 32k. */
4272
4273 static bfd_vma
4274 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4275 {
4276 bfd_vma where;
4277 unsigned int max_before_header;
4278
4279 if (htab->plt_type == PLT_VXWORKS)
4280 {
4281 where = htab->got->size;
4282 htab->got->size += need;
4283 }
4284 else
4285 {
4286 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4287 if (need <= htab->got_gap)
4288 {
4289 where = max_before_header - htab->got_gap;
4290 htab->got_gap -= need;
4291 }
4292 else
4293 {
4294 if (htab->got->size + need > max_before_header
4295 && htab->got->size <= max_before_header)
4296 {
4297 htab->got_gap = max_before_header - htab->got->size;
4298 htab->got->size = max_before_header + htab->got_header_size;
4299 }
4300 where = htab->got->size;
4301 htab->got->size += need;
4302 }
4303 }
4304 return where;
4305 }
4306
4307 /* Allocate space in associated reloc sections for dynamic relocs. */
4308
4309 static bfd_boolean
4310 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4311 {
4312 struct bfd_link_info *info = inf;
4313 struct ppc_elf_link_hash_entry *eh;
4314 struct ppc_elf_link_hash_table *htab;
4315 struct ppc_elf_dyn_relocs *p;
4316
4317 if (h->root.type == bfd_link_hash_indirect)
4318 return TRUE;
4319
4320 if (h->root.type == bfd_link_hash_warning)
4321 /* When warning symbols are created, they **replace** the "real"
4322 entry in the hash table, thus we never get to see the real
4323 symbol in a hash traversal. So look at it now. */
4324 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4325
4326 htab = ppc_elf_hash_table (info);
4327 if (htab->elf.dynamic_sections_created)
4328 {
4329 struct plt_entry *ent;
4330 bfd_boolean doneone = FALSE;
4331 bfd_vma plt_offset = 0, glink_offset = 0;
4332
4333 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4334 if (ent->plt.refcount > 0)
4335 {
4336 /* Make sure this symbol is output as a dynamic symbol. */
4337 if (h->dynindx == -1
4338 && !h->forced_local)
4339 {
4340 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4341 return FALSE;
4342 }
4343
4344 if (info->shared
4345 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4346 {
4347 asection *s = htab->plt;
4348
4349 if (htab->plt_type == PLT_NEW)
4350 {
4351 if (!doneone)
4352 {
4353 plt_offset = s->size;
4354 s->size += 4;
4355 }
4356 ent->plt.offset = plt_offset;
4357
4358 s = htab->glink;
4359 if (!doneone || info->shared || info->pie)
4360 {
4361 glink_offset = s->size;
4362 s->size += GLINK_ENTRY_SIZE;
4363 }
4364 if (!doneone
4365 && !info->shared
4366 && !h->def_regular)
4367 {
4368 h->root.u.def.section = s;
4369 h->root.u.def.value = glink_offset;
4370 }
4371 ent->glink_offset = glink_offset;
4372
4373 if (htab->emit_stub_syms
4374 && !add_stub_sym (ent, h, info))
4375 return FALSE;
4376 }
4377 else
4378 {
4379 if (!doneone)
4380 {
4381 /* If this is the first .plt entry, make room
4382 for the special first entry. */
4383 if (s->size == 0)
4384 s->size += htab->plt_initial_entry_size;
4385
4386 /* The PowerPC PLT is actually composed of two
4387 parts, the first part is 2 words (for a load
4388 and a jump), and then there is a remaining
4389 word available at the end. */
4390 plt_offset = (htab->plt_initial_entry_size
4391 + (htab->plt_slot_size
4392 * ((s->size
4393 - htab->plt_initial_entry_size)
4394 / htab->plt_entry_size)));
4395
4396 /* If this symbol is not defined in a regular
4397 file, and we are not generating a shared
4398 library, then set the symbol to this location
4399 in the .plt. This is required to make
4400 function pointers compare as equal between
4401 the normal executable and the shared library. */
4402 if (! info->shared
4403 && !h->def_regular)
4404 {
4405 h->root.u.def.section = s;
4406 h->root.u.def.value = plt_offset;
4407 }
4408
4409 /* Make room for this entry. */
4410 s->size += htab->plt_entry_size;
4411 /* After the 8192nd entry, room for two entries
4412 is allocated. */
4413 if (htab->plt_type == PLT_OLD
4414 && (s->size - htab->plt_initial_entry_size)
4415 / htab->plt_entry_size
4416 > PLT_NUM_SINGLE_ENTRIES)
4417 s->size += htab->plt_entry_size;
4418 }
4419 ent->plt.offset = plt_offset;
4420 }
4421
4422 /* We also need to make an entry in the .rela.plt section. */
4423 if (!doneone)
4424 {
4425 htab->relplt->size += sizeof (Elf32_External_Rela);
4426
4427 if (htab->plt_type == PLT_VXWORKS)
4428 {
4429 /* Allocate space for the unloaded relocations. */
4430 if (!info->shared)
4431 {
4432 if (ent->plt.offset
4433 == (bfd_vma) htab->plt_initial_entry_size)
4434 {
4435 htab->srelplt2->size
4436 += sizeof (Elf32_External_Rela)
4437 * VXWORKS_PLTRESOLVE_RELOCS;
4438 }
4439
4440 htab->srelplt2->size
4441 += sizeof (Elf32_External_Rela)
4442 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4443 }
4444
4445 /* Every PLT entry has an associated GOT entry in
4446 .got.plt. */
4447 htab->sgotplt->size += 4;
4448 }
4449 doneone = TRUE;
4450 }
4451 }
4452 else
4453 ent->plt.offset = (bfd_vma) -1;
4454
4455 if (!doneone)
4456 {
4457 h->plt.plist = NULL;
4458 h->needs_plt = 0;
4459 }
4460 }
4461 }
4462 else
4463 {
4464 h->plt.plist = NULL;
4465 h->needs_plt = 0;
4466 }
4467
4468 eh = (struct ppc_elf_link_hash_entry *) h;
4469 if (eh->elf.got.refcount > 0)
4470 {
4471 /* Make sure this symbol is output as a dynamic symbol. */
4472 if (eh->elf.dynindx == -1
4473 && !eh->elf.forced_local)
4474 {
4475 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4476 return FALSE;
4477 }
4478
4479 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4480 && !eh->elf.def_dynamic)
4481 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4482 eh->elf.got.offset = (bfd_vma) -1;
4483 else
4484 {
4485 bfd_boolean dyn;
4486 unsigned int need = 0;
4487 if ((eh->tls_mask & TLS_TLS) != 0)
4488 {
4489 if ((eh->tls_mask & TLS_LD) != 0)
4490 need += 8;
4491 if ((eh->tls_mask & TLS_GD) != 0)
4492 need += 8;
4493 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4494 need += 4;
4495 if ((eh->tls_mask & TLS_DTPREL) != 0)
4496 need += 4;
4497 }
4498 else
4499 need += 4;
4500 eh->elf.got.offset = allocate_got (htab, need);
4501 dyn = htab->elf.dynamic_sections_created;
4502 if ((info->shared
4503 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4504 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4505 || eh->elf.root.type != bfd_link_hash_undefweak))
4506 {
4507 /* All the entries we allocated need relocs.
4508 Except LD only needs one. */
4509 if ((eh->tls_mask & TLS_LD) != 0)
4510 need -= 4;
4511 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4512 }
4513 }
4514 }
4515 else
4516 eh->elf.got.offset = (bfd_vma) -1;
4517
4518 if (eh->dyn_relocs == NULL)
4519 return TRUE;
4520
4521 /* In the shared -Bsymbolic case, discard space allocated for
4522 dynamic pc-relative relocs against symbols which turn out to be
4523 defined in regular objects. For the normal shared case, discard
4524 space for relocs that have become local due to symbol visibility
4525 changes. */
4526
4527 if (info->shared)
4528 {
4529 /* Relocs that use pc_count are those that appear on a call insn,
4530 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4531 generated via assembly. We want calls to protected symbols to
4532 resolve directly to the function rather than going via the plt.
4533 If people want function pointer comparisons to work as expected
4534 then they should avoid writing weird assembly. */
4535 if (SYMBOL_CALLS_LOCAL (info, h))
4536 {
4537 struct ppc_elf_dyn_relocs **pp;
4538
4539 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4540 {
4541 p->count -= p->pc_count;
4542 p->pc_count = 0;
4543 if (p->count == 0)
4544 *pp = p->next;
4545 else
4546 pp = &p->next;
4547 }
4548 }
4549
4550 /* Also discard relocs on undefined weak syms with non-default
4551 visibility. */
4552 if (eh->dyn_relocs != NULL
4553 && h->root.type == bfd_link_hash_undefweak)
4554 {
4555 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4556 eh->dyn_relocs = NULL;
4557
4558 /* Make sure undefined weak symbols are output as a dynamic
4559 symbol in PIEs. */
4560 else if (h->dynindx == -1
4561 && !h->forced_local)
4562 {
4563 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4564 return FALSE;
4565 }
4566 }
4567 }
4568 else if (ELIMINATE_COPY_RELOCS)
4569 {
4570 /* For the non-shared case, discard space for relocs against
4571 symbols which turn out to need copy relocs or are not
4572 dynamic. */
4573
4574 if (!h->non_got_ref
4575 && h->def_dynamic
4576 && !h->def_regular)
4577 {
4578 /* Make sure this symbol is output as a dynamic symbol.
4579 Undefined weak syms won't yet be marked as dynamic. */
4580 if (h->dynindx == -1
4581 && !h->forced_local)
4582 {
4583 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4584 return FALSE;
4585 }
4586
4587 /* If that succeeded, we know we'll be keeping all the
4588 relocs. */
4589 if (h->dynindx != -1)
4590 goto keep;
4591 }
4592
4593 eh->dyn_relocs = NULL;
4594
4595 keep: ;
4596 }
4597
4598 /* Finally, allocate space. */
4599 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4600 {
4601 asection *sreloc = elf_section_data (p->sec)->sreloc;
4602 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4603 }
4604
4605 return TRUE;
4606 }
4607
4608 /* Find any dynamic relocs that apply to read-only sections. */
4609
4610 static bfd_boolean
4611 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4612 {
4613 struct ppc_elf_dyn_relocs *p;
4614
4615 if (h->root.type == bfd_link_hash_indirect)
4616 return TRUE;
4617
4618 if (h->root.type == bfd_link_hash_warning)
4619 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4620
4621 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4622 {
4623 asection *s = p->sec->output_section;
4624
4625 if (s != NULL
4626 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4627 == (SEC_READONLY | SEC_ALLOC)))
4628 {
4629 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4630
4631 /* Not an error, just cut short the traversal. */
4632 return FALSE;
4633 }
4634 }
4635 return TRUE;
4636 }
4637
4638 /* Set the sizes of the dynamic sections. */
4639
4640 static bfd_boolean
4641 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4642 struct bfd_link_info *info)
4643 {
4644 struct ppc_elf_link_hash_table *htab;
4645 asection *s;
4646 bfd_boolean relocs;
4647 bfd *ibfd;
4648
4649 #ifdef DEBUG
4650 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4651 #endif
4652
4653 htab = ppc_elf_hash_table (info);
4654 BFD_ASSERT (htab->elf.dynobj != NULL);
4655
4656 if (elf_hash_table (info)->dynamic_sections_created)
4657 {
4658 /* Set the contents of the .interp section to the interpreter. */
4659 if (info->executable)
4660 {
4661 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4662 BFD_ASSERT (s != NULL);
4663 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4664 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4665 }
4666 }
4667
4668 if (htab->plt_type == PLT_OLD)
4669 htab->got_header_size = 16;
4670 else if (htab->plt_type == PLT_NEW)
4671 htab->got_header_size = 12;
4672
4673 /* Set up .got offsets for local syms, and space for local dynamic
4674 relocs. */
4675 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4676 {
4677 bfd_signed_vma *local_got;
4678 bfd_signed_vma *end_local_got;
4679 char *lgot_masks;
4680 bfd_size_type locsymcount;
4681 Elf_Internal_Shdr *symtab_hdr;
4682
4683 if (!is_ppc_elf_target (ibfd->xvec))
4684 continue;
4685
4686 for (s = ibfd->sections; s != NULL; s = s->next)
4687 {
4688 struct ppc_elf_dyn_relocs *p;
4689
4690 for (p = ((struct ppc_elf_dyn_relocs *)
4691 elf_section_data (s)->local_dynrel);
4692 p != NULL;
4693 p = p->next)
4694 {
4695 if (!bfd_is_abs_section (p->sec)
4696 && bfd_is_abs_section (p->sec->output_section))
4697 {
4698 /* Input section has been discarded, either because
4699 it is a copy of a linkonce section or due to
4700 linker script /DISCARD/, so we'll be discarding
4701 the relocs too. */
4702 }
4703 else if (p->count != 0)
4704 {
4705 elf_section_data (p->sec)->sreloc->size
4706 += p->count * sizeof (Elf32_External_Rela);
4707 if ((p->sec->output_section->flags
4708 & (SEC_READONLY | SEC_ALLOC))
4709 == (SEC_READONLY | SEC_ALLOC))
4710 info->flags |= DF_TEXTREL;
4711 }
4712 }
4713 }
4714
4715 local_got = elf_local_got_refcounts (ibfd);
4716 if (!local_got)
4717 continue;
4718
4719 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4720 locsymcount = symtab_hdr->sh_info;
4721 end_local_got = local_got + locsymcount;
4722 lgot_masks = (char *) end_local_got;
4723 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4724 if (*local_got > 0)
4725 {
4726 if (*lgot_masks == (TLS_TLS | TLS_LD))
4727 {
4728 /* If just an LD reloc, we'll just use
4729 htab->tlsld_got.offset. */
4730 htab->tlsld_got.refcount += 1;
4731 *local_got = (bfd_vma) -1;
4732 }
4733 else
4734 {
4735 unsigned int need = 0;
4736 if ((*lgot_masks & TLS_TLS) != 0)
4737 {
4738 if ((*lgot_masks & TLS_GD) != 0)
4739 need += 8;
4740 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4741 need += 4;
4742 if ((*lgot_masks & TLS_DTPREL) != 0)
4743 need += 4;
4744 }
4745 else
4746 need += 4;
4747 *local_got = allocate_got (htab, need);
4748 if (info->shared)
4749 htab->relgot->size += (need
4750 * (sizeof (Elf32_External_Rela) / 4));
4751 }
4752 }
4753 else
4754 *local_got = (bfd_vma) -1;
4755 }
4756
4757 if (htab->tlsld_got.refcount > 0)
4758 {
4759 htab->tlsld_got.offset = allocate_got (htab, 8);
4760 if (info->shared)
4761 htab->relgot->size += sizeof (Elf32_External_Rela);
4762 }
4763 else
4764 htab->tlsld_got.offset = (bfd_vma) -1;
4765
4766 /* Allocate space for global sym dynamic relocs. */
4767 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4768
4769 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4770 {
4771 unsigned int g_o_t = 32768;
4772
4773 /* If we haven't allocated the header, do so now. When we get here,
4774 for old plt/got the got size will be 0 to 32764 (not allocated),
4775 or 32780 to 65536 (header allocated). For new plt/got, the
4776 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4777 if (htab->got->size <= 32768)
4778 {
4779 g_o_t = htab->got->size;
4780 if (htab->plt_type == PLT_OLD)
4781 g_o_t += 4;
4782 htab->got->size += htab->got_header_size;
4783 }
4784
4785 htab->elf.hgot->root.u.def.value = g_o_t;
4786 }
4787
4788 if (htab->glink != NULL && htab->glink->size != 0)
4789 {
4790 htab->glink_pltresolve = htab->glink->size;
4791 /* Space for the branch table. */
4792 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4793 /* Pad out to align the start of PLTresolve. */
4794 htab->glink->size += -htab->glink->size & 15;
4795 htab->glink->size += GLINK_PLTRESOLVE;
4796
4797 if (htab->emit_stub_syms)
4798 {
4799 struct elf_link_hash_entry *sh;
4800 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4801 TRUE, FALSE, FALSE);
4802 if (sh == NULL)
4803 return FALSE;
4804 if (sh->root.type == bfd_link_hash_new)
4805 {
4806 sh->root.type = bfd_link_hash_defined;
4807 sh->root.u.def.section = htab->glink;
4808 sh->root.u.def.value = htab->glink_pltresolve;
4809 sh->ref_regular = 1;
4810 sh->def_regular = 1;
4811 sh->ref_regular_nonweak = 1;
4812 sh->forced_local = 1;
4813 sh->non_elf = 0;
4814 }
4815 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4816 TRUE, FALSE, FALSE);
4817 if (sh == NULL)
4818 return FALSE;
4819 if (sh->root.type == bfd_link_hash_new)
4820 {
4821 sh->root.type = bfd_link_hash_defined;
4822 sh->root.u.def.section = htab->glink;
4823 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4824 sh->ref_regular = 1;
4825 sh->def_regular = 1;
4826 sh->ref_regular_nonweak = 1;
4827 sh->forced_local = 1;
4828 sh->non_elf = 0;
4829 }
4830 }
4831 }
4832
4833 /* We've now determined the sizes of the various dynamic sections.
4834 Allocate memory for them. */
4835 relocs = FALSE;
4836 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4837 {
4838 bfd_boolean strip_section = TRUE;
4839
4840 if ((s->flags & SEC_LINKER_CREATED) == 0)
4841 continue;
4842
4843 if (s == htab->plt
4844 || s == htab->glink
4845 || s == htab->got
4846 || s == htab->sgotplt
4847 || s == htab->sbss
4848 || s == htab->dynbss
4849 || s == htab->dynsbss)
4850 {
4851 /* We'd like to strip these sections if they aren't needed, but if
4852 we've exported dynamic symbols from them we must leave them.
4853 It's too late to tell BFD to get rid of the symbols. */
4854 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4855 strip_section = FALSE;
4856 /* Strip this section if we don't need it; see the
4857 comment below. */
4858 }
4859 else if (s == htab->sdata[0].section
4860 || s == htab->sdata[1].section)
4861 {
4862 /* Strip these too. */
4863 }
4864 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4865 {
4866 if (s->size != 0)
4867 {
4868 /* Remember whether there are any relocation sections. */
4869 relocs = TRUE;
4870
4871 /* We use the reloc_count field as a counter if we need
4872 to copy relocs into the output file. */
4873 s->reloc_count = 0;
4874 }
4875 }
4876 else
4877 {
4878 /* It's not one of our sections, so don't allocate space. */
4879 continue;
4880 }
4881
4882 if (s->size == 0 && strip_section)
4883 {
4884 /* If we don't need this section, strip it from the
4885 output file. This is mostly to handle .rela.bss and
4886 .rela.plt. We must create both sections in
4887 create_dynamic_sections, because they must be created
4888 before the linker maps input sections to output
4889 sections. The linker does that before
4890 adjust_dynamic_symbol is called, and it is that
4891 function which decides whether anything needs to go
4892 into these sections. */
4893 s->flags |= SEC_EXCLUDE;
4894 continue;
4895 }
4896
4897 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4898 continue;
4899
4900 /* Allocate memory for the section contents. */
4901 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4902 if (s->contents == NULL)
4903 return FALSE;
4904 }
4905
4906 if (htab->elf.dynamic_sections_created)
4907 {
4908 /* Add some entries to the .dynamic section. We fill in the
4909 values later, in ppc_elf_finish_dynamic_sections, but we
4910 must add the entries now so that we get the correct size for
4911 the .dynamic section. The DT_DEBUG entry is filled in by the
4912 dynamic linker and used by the debugger. */
4913 #define add_dynamic_entry(TAG, VAL) \
4914 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4915
4916 if (info->executable)
4917 {
4918 if (!add_dynamic_entry (DT_DEBUG, 0))
4919 return FALSE;
4920 }
4921
4922 if (htab->plt != NULL && htab->plt->size != 0)
4923 {
4924 if (!add_dynamic_entry (DT_PLTGOT, 0)
4925 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4926 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4927 || !add_dynamic_entry (DT_JMPREL, 0))
4928 return FALSE;
4929 }
4930
4931 if (htab->glink != NULL && htab->glink->size != 0)
4932 {
4933 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4934 return FALSE;
4935 }
4936
4937 if (relocs)
4938 {
4939 if (!add_dynamic_entry (DT_RELA, 0)
4940 || !add_dynamic_entry (DT_RELASZ, 0)
4941 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4942 return FALSE;
4943 }
4944
4945 /* If any dynamic relocs apply to a read-only section, then we
4946 need a DT_TEXTREL entry. */
4947 if ((info->flags & DF_TEXTREL) == 0)
4948 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4949 info);
4950
4951 if ((info->flags & DF_TEXTREL) != 0)
4952 {
4953 if (!add_dynamic_entry (DT_TEXTREL, 0))
4954 return FALSE;
4955 }
4956 }
4957 #undef add_dynamic_entry
4958
4959 return TRUE;
4960 }
4961 \f
4962 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4963
4964 static const int shared_stub_entry[] =
4965 {
4966 0x7c0802a6, /* mflr 0 */
4967 0x429f0005, /* bcl 20, 31, .Lxxx */
4968 0x7d6802a6, /* mflr 11 */
4969 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4970 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4971 0x7c0803a6, /* mtlr 0 */
4972 0x7d6903a6, /* mtctr 11 */
4973 0x4e800420, /* bctr */
4974 };
4975
4976 static const int stub_entry[] =
4977 {
4978 0x3d600000, /* lis 11,xxx@ha */
4979 0x396b0000, /* addi 11,11,xxx@l */
4980 0x7d6903a6, /* mtctr 11 */
4981 0x4e800420, /* bctr */
4982 };
4983
4984 static bfd_boolean
4985 ppc_elf_relax_section (bfd *abfd,
4986 asection *isec,
4987 struct bfd_link_info *link_info,
4988 bfd_boolean *again)
4989 {
4990 struct one_fixup
4991 {
4992 struct one_fixup *next;
4993 asection *tsec;
4994 bfd_vma toff;
4995 bfd_vma trampoff;
4996 };
4997
4998 Elf_Internal_Shdr *symtab_hdr;
4999 bfd_byte *contents = NULL;
5000 Elf_Internal_Sym *isymbuf = NULL;
5001 Elf_Internal_Rela *internal_relocs = NULL;
5002 Elf_Internal_Rela *irel, *irelend;
5003 struct one_fixup *fixups = NULL;
5004 bfd_boolean changed;
5005 struct ppc_elf_link_hash_table *htab;
5006 bfd_size_type trampoff;
5007 asection *got2;
5008
5009 *again = FALSE;
5010
5011 /* Nothing to do if there are no relocations, and no need to do
5012 anything with non-alloc sections. */
5013 if ((isec->flags & SEC_ALLOC) == 0
5014 || (isec->flags & SEC_RELOC) == 0
5015 || isec->reloc_count == 0)
5016 return TRUE;
5017
5018 trampoff = (isec->size + 3) & (bfd_vma) -4;
5019 /* Space for a branch around any trampolines. */
5020 trampoff += 4;
5021
5022 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5023
5024 /* Get a copy of the native relocations. */
5025 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5026 link_info->keep_memory);
5027 if (internal_relocs == NULL)
5028 goto error_return;
5029
5030 htab = ppc_elf_hash_table (link_info);
5031 got2 = bfd_get_section_by_name (abfd, ".got2");
5032
5033 irelend = internal_relocs + isec->reloc_count;
5034 for (irel = internal_relocs; irel < irelend; irel++)
5035 {
5036 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5037 bfd_vma symaddr, reladdr, toff, roff;
5038 asection *tsec;
5039 struct one_fixup *f;
5040 size_t insn_offset = 0;
5041 bfd_vma max_branch_offset, val;
5042 bfd_byte *hit_addr;
5043 unsigned long t0;
5044 unsigned char sym_type;
5045
5046 switch (r_type)
5047 {
5048 case R_PPC_REL24:
5049 case R_PPC_LOCAL24PC:
5050 case R_PPC_PLTREL24:
5051 max_branch_offset = 1 << 25;
5052 break;
5053
5054 case R_PPC_REL14:
5055 case R_PPC_REL14_BRTAKEN:
5056 case R_PPC_REL14_BRNTAKEN:
5057 max_branch_offset = 1 << 15;
5058 break;
5059
5060 default:
5061 continue;
5062 }
5063
5064 /* Get the value of the symbol referred to by the reloc. */
5065 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5066 {
5067 /* A local symbol. */
5068 Elf_Internal_Sym *isym;
5069
5070 /* Read this BFD's local symbols. */
5071 if (isymbuf == NULL)
5072 {
5073 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5074 if (isymbuf == NULL)
5075 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5076 symtab_hdr->sh_info, 0,
5077 NULL, NULL, NULL);
5078 if (isymbuf == 0)
5079 goto error_return;
5080 }
5081 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5082 if (isym->st_shndx == SHN_UNDEF)
5083 continue; /* We can't do anything with undefined symbols. */
5084 else if (isym->st_shndx == SHN_ABS)
5085 tsec = bfd_abs_section_ptr;
5086 else if (isym->st_shndx == SHN_COMMON)
5087 tsec = bfd_com_section_ptr;
5088 else
5089 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5090
5091 toff = isym->st_value;
5092 sym_type = ELF_ST_TYPE (isym->st_info);
5093 }
5094 else
5095 {
5096 /* Global symbol handling. */
5097 unsigned long indx;
5098 struct elf_link_hash_entry *h;
5099
5100 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5101 h = elf_sym_hashes (abfd)[indx];
5102
5103 while (h->root.type == bfd_link_hash_indirect
5104 || h->root.type == bfd_link_hash_warning)
5105 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5106
5107 tsec = NULL;
5108 toff = 0;
5109 if (r_type == R_PPC_PLTREL24
5110 && htab->plt != NULL)
5111 {
5112 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5113
5114 if (ent != NULL)
5115 {
5116 if (htab->plt_type == PLT_NEW)
5117 {
5118 tsec = htab->glink;
5119 toff = ent->glink_offset;
5120 }
5121 else
5122 {
5123 tsec = htab->plt;
5124 toff = ent->plt.offset;
5125 }
5126 }
5127 }
5128 if (tsec != NULL)
5129 ;
5130 else if (h->root.type == bfd_link_hash_defined
5131 || h->root.type == bfd_link_hash_defweak)
5132 {
5133 tsec = h->root.u.def.section;
5134 toff = h->root.u.def.value;
5135 }
5136 else
5137 continue;
5138
5139 sym_type = h->type;
5140 }
5141
5142 /* If the branch and target are in the same section, you have
5143 no hope of adding stubs. We'll error out later should the
5144 branch overflow. */
5145 if (tsec == isec)
5146 continue;
5147
5148 /* There probably isn't any reason to handle symbols in
5149 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5150 attribute for a code section, and we are only looking at
5151 branches. However, implement it correctly here as a
5152 reference for other target relax_section functions. */
5153 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5154 {
5155 /* At this stage in linking, no SEC_MERGE symbol has been
5156 adjusted, so all references to such symbols need to be
5157 passed through _bfd_merged_section_offset. (Later, in
5158 relocate_section, all SEC_MERGE symbols *except* for
5159 section symbols have been adjusted.)
5160
5161 gas may reduce relocations against symbols in SEC_MERGE
5162 sections to a relocation against the section symbol when
5163 the original addend was zero. When the reloc is against
5164 a section symbol we should include the addend in the
5165 offset passed to _bfd_merged_section_offset, since the
5166 location of interest is the original symbol. On the
5167 other hand, an access to "sym+addend" where "sym" is not
5168 a section symbol should not include the addend; Such an
5169 access is presumed to be an offset from "sym"; The
5170 location of interest is just "sym". */
5171 if (sym_type == STT_SECTION)
5172 toff += irel->r_addend;
5173
5174 toff = _bfd_merged_section_offset (abfd, &tsec,
5175 elf_section_data (tsec)->sec_info,
5176 toff);
5177
5178 if (sym_type != STT_SECTION)
5179 toff += irel->r_addend;
5180 }
5181 /* PLTREL24 addends are special. */
5182 else if (r_type != R_PPC_PLTREL24)
5183 toff += irel->r_addend;
5184
5185 /* Attempted -shared link of non-pic code loses. */
5186 if (tsec->output_section == NULL)
5187 continue;
5188
5189 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5190
5191 roff = irel->r_offset;
5192 reladdr = isec->output_section->vma + isec->output_offset + roff;
5193
5194 /* If the branch is in range, no need to do anything. */
5195 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5196 continue;
5197
5198 /* Look for an existing fixup to this address. */
5199 for (f = fixups; f ; f = f->next)
5200 if (f->tsec == tsec && f->toff == toff)
5201 break;
5202
5203 if (f == NULL)
5204 {
5205 size_t size;
5206 unsigned long stub_rtype;
5207
5208 val = trampoff - roff;
5209 if (val >= max_branch_offset)
5210 /* Oh dear, we can't reach a trampoline. Don't try to add
5211 one. We'll report an error later. */
5212 continue;
5213
5214 if (link_info->shared)
5215 {
5216 size = 4 * ARRAY_SIZE (shared_stub_entry);
5217 insn_offset = 12;
5218 stub_rtype = R_PPC_RELAX32PC;
5219 }
5220 else
5221 {
5222 size = 4 * ARRAY_SIZE (stub_entry);
5223 insn_offset = 0;
5224 stub_rtype = R_PPC_RELAX32;
5225 }
5226
5227 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5228 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5229 abort ();
5230 if (tsec == htab->plt
5231 || tsec == htab->glink)
5232 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5233
5234 /* Hijack the old relocation. Since we need two
5235 relocations for this use a "composite" reloc. */
5236 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5237 stub_rtype);
5238 irel->r_offset = trampoff + insn_offset;
5239
5240 /* Record the fixup so we don't do it again this section. */
5241 f = bfd_malloc (sizeof (*f));
5242 f->next = fixups;
5243 f->tsec = tsec;
5244 f->toff = toff;
5245 f->trampoff = trampoff;
5246 fixups = f;
5247
5248 trampoff += size;
5249 }
5250 else
5251 {
5252 val = f->trampoff - roff;
5253 if (val >= max_branch_offset)
5254 continue;
5255
5256 /* Nop out the reloc, since we're finalizing things here. */
5257 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5258 }
5259
5260 /* Get the section contents. */
5261 if (contents == NULL)
5262 {
5263 /* Get cached copy if it exists. */
5264 if (elf_section_data (isec)->this_hdr.contents != NULL)
5265 contents = elf_section_data (isec)->this_hdr.contents;
5266 else
5267 {
5268 /* Go get them off disk. */
5269 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5270 goto error_return;
5271 }
5272 }
5273
5274 /* Fix up the existing branch to hit the trampoline. */
5275 hit_addr = contents + roff;
5276 switch (r_type)
5277 {
5278 case R_PPC_REL24:
5279 case R_PPC_LOCAL24PC:
5280 case R_PPC_PLTREL24:
5281 t0 = bfd_get_32 (abfd, hit_addr);
5282 t0 &= ~0x3fffffc;
5283 t0 |= val & 0x3fffffc;
5284 bfd_put_32 (abfd, t0, hit_addr);
5285 break;
5286
5287 case R_PPC_REL14:
5288 case R_PPC_REL14_BRTAKEN:
5289 case R_PPC_REL14_BRNTAKEN:
5290 t0 = bfd_get_32 (abfd, hit_addr);
5291 t0 &= ~0xfffc;
5292 t0 |= val & 0xfffc;
5293 bfd_put_32 (abfd, t0, hit_addr);
5294 break;
5295 }
5296 }
5297
5298 /* Write out the trampolines. */
5299 changed = fixups != NULL;
5300 if (fixups != NULL)
5301 {
5302 const int *stub;
5303 bfd_byte *dest;
5304 bfd_vma val;
5305 int i, size;
5306
5307 do
5308 {
5309 struct one_fixup *f = fixups;
5310 fixups = fixups->next;
5311 free (f);
5312 }
5313 while (fixups);
5314
5315 contents = bfd_realloc (contents, trampoff);
5316 if (contents == NULL)
5317 goto error_return;
5318
5319 isec->size = (isec->size + 3) & (bfd_vma) -4;
5320 /* Branch around the trampolines. */
5321 val = trampoff - isec->size + 0x48000000;
5322 dest = contents + isec->size;
5323 isec->size = trampoff;
5324 bfd_put_32 (abfd, val, dest);
5325 dest += 4;
5326
5327 if (link_info->shared)
5328 {
5329 stub = shared_stub_entry;
5330 size = ARRAY_SIZE (shared_stub_entry);
5331 }
5332 else
5333 {
5334 stub = stub_entry;
5335 size = ARRAY_SIZE (stub_entry);
5336 }
5337
5338 i = 0;
5339 while (dest < contents + trampoff)
5340 {
5341 bfd_put_32 (abfd, stub[i], dest);
5342 i++;
5343 if (i == size)
5344 i = 0;
5345 dest += 4;
5346 }
5347 BFD_ASSERT (i == 0);
5348 }
5349
5350 if (isymbuf != NULL
5351 && symtab_hdr->contents != (unsigned char *) isymbuf)
5352 {
5353 if (! link_info->keep_memory)
5354 free (isymbuf);
5355 else
5356 {
5357 /* Cache the symbols for elf_link_input_bfd. */
5358 symtab_hdr->contents = (unsigned char *) isymbuf;
5359 }
5360 }
5361
5362 if (contents != NULL
5363 && elf_section_data (isec)->this_hdr.contents != contents)
5364 {
5365 if (!changed && !link_info->keep_memory)
5366 free (contents);
5367 else
5368 {
5369 /* Cache the section contents for elf_link_input_bfd. */
5370 elf_section_data (isec)->this_hdr.contents = contents;
5371 }
5372 }
5373
5374 if (elf_section_data (isec)->relocs != internal_relocs)
5375 {
5376 if (!changed)
5377 free (internal_relocs);
5378 else
5379 elf_section_data (isec)->relocs = internal_relocs;
5380 }
5381
5382 *again = changed;
5383 return TRUE;
5384
5385 error_return:
5386 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5387 free (isymbuf);
5388 if (contents != NULL
5389 && elf_section_data (isec)->this_hdr.contents != contents)
5390 free (contents);
5391 if (internal_relocs != NULL
5392 && elf_section_data (isec)->relocs != internal_relocs)
5393 free (internal_relocs);
5394 return FALSE;
5395 }
5396 \f
5397 /* What to do when ld finds relocations against symbols defined in
5398 discarded sections. */
5399
5400 static unsigned int
5401 ppc_elf_action_discarded (asection *sec)
5402 {
5403 if (strcmp (".fixup", sec->name) == 0)
5404 return 0;
5405
5406 if (strcmp (".got2", sec->name) == 0)
5407 return 0;
5408
5409 return _bfd_elf_default_action_discarded (sec);
5410 }
5411 \f
5412 /* Fill in the address for a pointer generated in a linker section. */
5413
5414 static bfd_vma
5415 elf_finish_pointer_linker_section (bfd *input_bfd,
5416 elf_linker_section_t *lsect,
5417 struct elf_link_hash_entry *h,
5418 bfd_vma relocation,
5419 const Elf_Internal_Rela *rel)
5420 {
5421 elf_linker_section_pointers_t *linker_section_ptr;
5422
5423 BFD_ASSERT (lsect != NULL);
5424
5425 if (h != NULL)
5426 {
5427 /* Handle global symbol. */
5428 struct ppc_elf_link_hash_entry *eh;
5429
5430 eh = (struct ppc_elf_link_hash_entry *) h;
5431 BFD_ASSERT (eh->elf.def_regular);
5432 linker_section_ptr = eh->linker_section_pointer;
5433 }
5434 else
5435 {
5436 /* Handle local symbol. */
5437 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5438
5439 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5440 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5441 }
5442
5443 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5444 rel->r_addend,
5445 lsect);
5446 BFD_ASSERT (linker_section_ptr != NULL);
5447
5448 /* Offset will always be a multiple of four, so use the bottom bit
5449 as a "written" flag. */
5450 if ((linker_section_ptr->offset & 1) == 0)
5451 {
5452 bfd_put_32 (lsect->section->owner,
5453 relocation + linker_section_ptr->addend,
5454 lsect->section->contents + linker_section_ptr->offset);
5455 linker_section_ptr->offset += 1;
5456 }
5457
5458 relocation = (lsect->section->output_offset
5459 + linker_section_ptr->offset - 1
5460 - 0x8000);
5461
5462 #ifdef DEBUG
5463 fprintf (stderr,
5464 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5465 lsect->name, (long) relocation, (long) relocation);
5466 #endif
5467
5468 /* Subtract out the addend, because it will get added back in by the normal
5469 processing. */
5470 return relocation - linker_section_ptr->addend;
5471 }
5472
5473 /* The RELOCATE_SECTION function is called by the ELF backend linker
5474 to handle the relocations for a section.
5475
5476 The relocs are always passed as Rela structures; if the section
5477 actually uses Rel structures, the r_addend field will always be
5478 zero.
5479
5480 This function is responsible for adjust the section contents as
5481 necessary, and (if using Rela relocs and generating a
5482 relocatable output file) adjusting the reloc addend as
5483 necessary.
5484
5485 This function does not have to worry about setting the reloc
5486 address or the reloc symbol index.
5487
5488 LOCAL_SYMS is a pointer to the swapped in local symbols.
5489
5490 LOCAL_SECTIONS is an array giving the section in the input file
5491 corresponding to the st_shndx field of each local symbol.
5492
5493 The global hash table entry for the global symbols can be found
5494 via elf_sym_hashes (input_bfd).
5495
5496 When generating relocatable output, this function must handle
5497 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5498 going to be the section symbol corresponding to the output
5499 section, which means that the addend must be adjusted
5500 accordingly. */
5501
5502 static bfd_boolean
5503 ppc_elf_relocate_section (bfd *output_bfd,
5504 struct bfd_link_info *info,
5505 bfd *input_bfd,
5506 asection *input_section,
5507 bfd_byte *contents,
5508 Elf_Internal_Rela *relocs,
5509 Elf_Internal_Sym *local_syms,
5510 asection **local_sections)
5511 {
5512 Elf_Internal_Shdr *symtab_hdr;
5513 struct elf_link_hash_entry **sym_hashes;
5514 struct ppc_elf_link_hash_table *htab;
5515 Elf_Internal_Rela *rel;
5516 Elf_Internal_Rela *relend;
5517 Elf_Internal_Rela outrel;
5518 bfd_byte *loc;
5519 asection *got2, *sreloc = NULL;
5520 bfd_vma *local_got_offsets;
5521 bfd_boolean ret = TRUE;
5522
5523 #ifdef DEBUG
5524 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5525 "%ld relocations%s",
5526 input_bfd, input_section,
5527 (long) input_section->reloc_count,
5528 (info->relocatable) ? " (relocatable)" : "");
5529 #endif
5530
5531 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5532
5533 if (info->relocatable)
5534 {
5535 if (got2 == NULL)
5536 return TRUE;
5537
5538 rel = relocs;
5539 relend = relocs + input_section->reloc_count;
5540 for (; rel < relend; rel++)
5541 {
5542 enum elf_ppc_reloc_type r_type;
5543
5544 r_type = ELF32_R_TYPE (rel->r_info);
5545 if (r_type == R_PPC_PLTREL24
5546 && rel->r_addend >= 32768)
5547 {
5548 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5549 addend specifies the GOT pointer offset within .got2. */
5550 rel->r_addend += got2->output_offset;
5551 }
5552 }
5553 return TRUE;
5554 }
5555
5556 /* Initialize howto table if not already done. */
5557 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5558 ppc_elf_howto_init ();
5559
5560 htab = ppc_elf_hash_table (info);
5561 local_got_offsets = elf_local_got_offsets (input_bfd);
5562 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5563 sym_hashes = elf_sym_hashes (input_bfd);
5564 rel = relocs;
5565 relend = relocs + input_section->reloc_count;
5566 for (; rel < relend; rel++)
5567 {
5568 enum elf_ppc_reloc_type r_type;
5569 bfd_vma addend;
5570 bfd_reloc_status_type r;
5571 Elf_Internal_Sym *sym;
5572 asection *sec;
5573 struct elf_link_hash_entry *h;
5574 const char *sym_name;
5575 reloc_howto_type *howto;
5576 unsigned long r_symndx;
5577 bfd_vma relocation;
5578 bfd_vma branch_bit, insn, from;
5579 bfd_boolean unresolved_reloc;
5580 bfd_boolean warned;
5581 unsigned int tls_type, tls_mask, tls_gd;
5582
5583 r_type = ELF32_R_TYPE (rel->r_info);
5584 sym = NULL;
5585 sec = NULL;
5586 h = NULL;
5587 unresolved_reloc = FALSE;
5588 warned = FALSE;
5589 r_symndx = ELF32_R_SYM (rel->r_info);
5590
5591 if (r_symndx < symtab_hdr->sh_info)
5592 {
5593 sym = local_syms + r_symndx;
5594 sec = local_sections[r_symndx];
5595 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5596
5597 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5598 }
5599 else
5600 {
5601 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5602 r_symndx, symtab_hdr, sym_hashes,
5603 h, sec, relocation,
5604 unresolved_reloc, warned);
5605
5606 sym_name = h->root.root.string;
5607 }
5608
5609 /* TLS optimizations. Replace instruction sequences and relocs
5610 based on information we collected in tls_optimize. We edit
5611 RELOCS so that --emit-relocs will output something sensible
5612 for the final instruction stream. */
5613 tls_mask = 0;
5614 tls_gd = 0;
5615 if (IS_PPC_TLS_RELOC (r_type))
5616 {
5617 if (h != NULL)
5618 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5619 else if (local_got_offsets != NULL)
5620 {
5621 char *lgot_masks;
5622 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5623 tls_mask = lgot_masks[r_symndx];
5624 }
5625 }
5626
5627 /* Ensure reloc mapping code below stays sane. */
5628 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5629 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5630 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5631 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5632 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5633 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5634 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5635 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5636 abort ();
5637 switch (r_type)
5638 {
5639 default:
5640 break;
5641
5642 case R_PPC_GOT_TPREL16:
5643 case R_PPC_GOT_TPREL16_LO:
5644 if (tls_mask != 0
5645 && (tls_mask & TLS_TPREL) == 0)
5646 {
5647 bfd_vma insn;
5648 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5649 insn &= 31 << 21;
5650 insn |= 0x3c020000; /* addis 0,2,0 */
5651 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5652 r_type = R_PPC_TPREL16_HA;
5653 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5654 }
5655 break;
5656
5657 case R_PPC_TLS:
5658 if (tls_mask != 0
5659 && (tls_mask & TLS_TPREL) == 0)
5660 {
5661 bfd_vma insn, rtra;
5662 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5663 if ((insn & ((31 << 26) | (31 << 11)))
5664 == ((31 << 26) | (2 << 11)))
5665 rtra = insn & ((1 << 26) - (1 << 16));
5666 else if ((insn & ((31 << 26) | (31 << 16)))
5667 == ((31 << 26) | (2 << 16)))
5668 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5669 else
5670 abort ();
5671 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5672 /* add -> addi. */
5673 insn = 14 << 26;
5674 else if ((insn & (31 << 1)) == 23 << 1
5675 && ((insn & (31 << 6)) < 14 << 6
5676 || ((insn & (31 << 6)) >= 16 << 6
5677 && (insn & (31 << 6)) < 24 << 6)))
5678 /* load and store indexed -> dform. */
5679 insn = (32 | ((insn >> 6) & 31)) << 26;
5680 else if ((insn & (31 << 1)) == 21 << 1
5681 && (insn & (0x1a << 6)) == 0)
5682 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5683 insn = (((58 | ((insn >> 6) & 4)) << 26)
5684 | ((insn >> 6) & 1));
5685 else if ((insn & (31 << 1)) == 21 << 1
5686 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5687 /* lwax -> lwa. */
5688 insn = (58 << 26) | 2;
5689 else
5690 abort ();
5691 insn |= rtra;
5692 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5693 r_type = R_PPC_TPREL16_LO;
5694 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5695 /* Was PPC_TLS which sits on insn boundary, now
5696 PPC_TPREL16_LO which is at insn+2. */
5697 rel->r_offset += 2;
5698 }
5699 break;
5700
5701 case R_PPC_GOT_TLSGD16_HI:
5702 case R_PPC_GOT_TLSGD16_HA:
5703 tls_gd = TLS_TPRELGD;
5704 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5705 goto tls_gdld_hi;
5706 break;
5707
5708 case R_PPC_GOT_TLSLD16_HI:
5709 case R_PPC_GOT_TLSLD16_HA:
5710 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5711 {
5712 tls_gdld_hi:
5713 if ((tls_mask & tls_gd) != 0)
5714 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5715 + R_PPC_GOT_TPREL16);
5716 else
5717 {
5718 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5719 rel->r_offset -= 2;
5720 r_type = R_PPC_NONE;
5721 }
5722 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5723 }
5724 break;
5725
5726 case R_PPC_GOT_TLSGD16:
5727 case R_PPC_GOT_TLSGD16_LO:
5728 tls_gd = TLS_TPRELGD;
5729 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5730 goto tls_get_addr_check;
5731 break;
5732
5733 case R_PPC_GOT_TLSLD16:
5734 case R_PPC_GOT_TLSLD16_LO:
5735 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5736 {
5737 tls_get_addr_check:
5738 if (rel + 1 < relend)
5739 {
5740 enum elf_ppc_reloc_type r_type2;
5741 unsigned long r_symndx2;
5742 struct elf_link_hash_entry *h2;
5743 bfd_vma insn1, insn2;
5744 bfd_vma offset;
5745
5746 /* The next instruction should be a call to
5747 __tls_get_addr. Peek at the reloc to be sure. */
5748 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5749 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5750 if (r_symndx2 < symtab_hdr->sh_info
5751 || (r_type2 != R_PPC_REL14
5752 && r_type2 != R_PPC_REL14_BRTAKEN
5753 && r_type2 != R_PPC_REL14_BRNTAKEN
5754 && r_type2 != R_PPC_REL24
5755 && r_type2 != R_PPC_PLTREL24))
5756 break;
5757
5758 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5759 while (h2->root.type == bfd_link_hash_indirect
5760 || h2->root.type == bfd_link_hash_warning)
5761 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5762 if (h2 == NULL || h2 != htab->tls_get_addr)
5763 break;
5764
5765 /* OK, it checks out. Replace the call. */
5766 offset = rel[1].r_offset;
5767 insn1 = bfd_get_32 (output_bfd,
5768 contents + rel->r_offset - 2);
5769 if ((tls_mask & tls_gd) != 0)
5770 {
5771 /* IE */
5772 insn1 &= (1 << 26) - 1;
5773 insn1 |= 32 << 26; /* lwz */
5774 insn2 = 0x7c631214; /* add 3,3,2 */
5775 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5776 rel[1].r_addend = 0;
5777 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5778 + R_PPC_GOT_TPREL16);
5779 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5780 }
5781 else
5782 {
5783 /* LE */
5784 insn1 = 0x3c620000; /* addis 3,2,0 */
5785 insn2 = 0x38630000; /* addi 3,3,0 */
5786 if (tls_gd == 0)
5787 {
5788 /* Was an LD reloc. */
5789 r_symndx = 0;
5790 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5791 }
5792 r_type = R_PPC_TPREL16_HA;
5793 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5794 rel[1].r_info = ELF32_R_INFO (r_symndx,
5795 R_PPC_TPREL16_LO);
5796 rel[1].r_offset += 2;
5797 rel[1].r_addend = rel->r_addend;
5798 }
5799 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5800 bfd_put_32 (output_bfd, insn2, contents + offset);
5801 if (tls_gd == 0)
5802 {
5803 /* We changed the symbol on an LD reloc. Start over
5804 in order to get h, sym, sec etc. right. */
5805 rel--;
5806 continue;
5807 }
5808 }
5809 }
5810 break;
5811 }
5812
5813 /* Handle other relocations that tweak non-addend part of insn. */
5814 branch_bit = 0;
5815 switch (r_type)
5816 {
5817 default:
5818 break;
5819
5820 /* Branch taken prediction relocations. */
5821 case R_PPC_ADDR14_BRTAKEN:
5822 case R_PPC_REL14_BRTAKEN:
5823 branch_bit = BRANCH_PREDICT_BIT;
5824 /* Fall thru */
5825
5826 /* Branch not taken prediction relocations. */
5827 case R_PPC_ADDR14_BRNTAKEN:
5828 case R_PPC_REL14_BRNTAKEN:
5829 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5830 insn &= ~BRANCH_PREDICT_BIT;
5831 insn |= branch_bit;
5832
5833 from = (rel->r_offset
5834 + input_section->output_offset
5835 + input_section->output_section->vma);
5836
5837 /* Invert 'y' bit if not the default. */
5838 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5839 insn ^= BRANCH_PREDICT_BIT;
5840
5841 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5842 break;
5843 }
5844
5845 addend = rel->r_addend;
5846 tls_type = 0;
5847 howto = NULL;
5848 if (r_type < R_PPC_max)
5849 howto = ppc_elf_howto_table[r_type];
5850 switch (r_type)
5851 {
5852 default:
5853 (*_bfd_error_handler)
5854 (_("%B: unknown relocation type %d for symbol %s"),
5855 input_bfd, (int) r_type, sym_name);
5856
5857 bfd_set_error (bfd_error_bad_value);
5858 ret = FALSE;
5859 continue;
5860
5861 case R_PPC_NONE:
5862 case R_PPC_TLS:
5863 case R_PPC_EMB_MRKREF:
5864 case R_PPC_GNU_VTINHERIT:
5865 case R_PPC_GNU_VTENTRY:
5866 continue;
5867
5868 /* GOT16 relocations. Like an ADDR16 using the symbol's
5869 address in the GOT as relocation value instead of the
5870 symbol's value itself. Also, create a GOT entry for the
5871 symbol and put the symbol value there. */
5872 case R_PPC_GOT_TLSGD16:
5873 case R_PPC_GOT_TLSGD16_LO:
5874 case R_PPC_GOT_TLSGD16_HI:
5875 case R_PPC_GOT_TLSGD16_HA:
5876 tls_type = TLS_TLS | TLS_GD;
5877 goto dogot;
5878
5879 case R_PPC_GOT_TLSLD16:
5880 case R_PPC_GOT_TLSLD16_LO:
5881 case R_PPC_GOT_TLSLD16_HI:
5882 case R_PPC_GOT_TLSLD16_HA:
5883 tls_type = TLS_TLS | TLS_LD;
5884 goto dogot;
5885
5886 case R_PPC_GOT_TPREL16:
5887 case R_PPC_GOT_TPREL16_LO:
5888 case R_PPC_GOT_TPREL16_HI:
5889 case R_PPC_GOT_TPREL16_HA:
5890 tls_type = TLS_TLS | TLS_TPREL;
5891 goto dogot;
5892
5893 case R_PPC_GOT_DTPREL16:
5894 case R_PPC_GOT_DTPREL16_LO:
5895 case R_PPC_GOT_DTPREL16_HI:
5896 case R_PPC_GOT_DTPREL16_HA:
5897 tls_type = TLS_TLS | TLS_DTPREL;
5898 goto dogot;
5899
5900 case R_PPC_GOT16:
5901 case R_PPC_GOT16_LO:
5902 case R_PPC_GOT16_HI:
5903 case R_PPC_GOT16_HA:
5904 dogot:
5905 {
5906 /* Relocation is to the entry for this symbol in the global
5907 offset table. */
5908 bfd_vma off;
5909 bfd_vma *offp;
5910 unsigned long indx;
5911
5912 if (htab->got == NULL)
5913 abort ();
5914
5915 indx = 0;
5916 if (tls_type == (TLS_TLS | TLS_LD)
5917 && (h == NULL
5918 || !h->def_dynamic))
5919 offp = &htab->tlsld_got.offset;
5920 else if (h != NULL)
5921 {
5922 bfd_boolean dyn;
5923 dyn = htab->elf.dynamic_sections_created;
5924 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5925 || (info->shared
5926 && SYMBOL_REFERENCES_LOCAL (info, h)))
5927 /* This is actually a static link, or it is a
5928 -Bsymbolic link and the symbol is defined
5929 locally, or the symbol was forced to be local
5930 because of a version file. */
5931 ;
5932 else
5933 {
5934 indx = h->dynindx;
5935 unresolved_reloc = FALSE;
5936 }
5937 offp = &h->got.offset;
5938 }
5939 else
5940 {
5941 if (local_got_offsets == NULL)
5942 abort ();
5943 offp = &local_got_offsets[r_symndx];
5944 }
5945
5946 /* The offset must always be a multiple of 4. We use the
5947 least significant bit to record whether we have already
5948 processed this entry. */
5949 off = *offp;
5950 if ((off & 1) != 0)
5951 off &= ~1;
5952 else
5953 {
5954 unsigned int tls_m = (tls_mask
5955 & (TLS_LD | TLS_GD | TLS_DTPREL
5956 | TLS_TPREL | TLS_TPRELGD));
5957
5958 if (offp == &htab->tlsld_got.offset)
5959 tls_m = TLS_LD;
5960 else if (h == NULL
5961 || !h->def_dynamic)
5962 tls_m &= ~TLS_LD;
5963
5964 /* We might have multiple got entries for this sym.
5965 Initialize them all. */
5966 do
5967 {
5968 int tls_ty = 0;
5969
5970 if ((tls_m & TLS_LD) != 0)
5971 {
5972 tls_ty = TLS_TLS | TLS_LD;
5973 tls_m &= ~TLS_LD;
5974 }
5975 else if ((tls_m & TLS_GD) != 0)
5976 {
5977 tls_ty = TLS_TLS | TLS_GD;
5978 tls_m &= ~TLS_GD;
5979 }
5980 else if ((tls_m & TLS_DTPREL) != 0)
5981 {
5982 tls_ty = TLS_TLS | TLS_DTPREL;
5983 tls_m &= ~TLS_DTPREL;
5984 }
5985 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5986 {
5987 tls_ty = TLS_TLS | TLS_TPREL;
5988 tls_m = 0;
5989 }
5990
5991 /* Generate relocs for the dynamic linker. */
5992 if ((info->shared || indx != 0)
5993 && (h == NULL
5994 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5995 || h->root.type != bfd_link_hash_undefweak))
5996 {
5997 outrel.r_offset = (htab->got->output_section->vma
5998 + htab->got->output_offset
5999 + off);
6000 outrel.r_addend = 0;
6001 if (tls_ty & (TLS_LD | TLS_GD))
6002 {
6003 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6004 if (tls_ty == (TLS_TLS | TLS_GD))
6005 {
6006 loc = htab->relgot->contents;
6007 loc += (htab->relgot->reloc_count++
6008 * sizeof (Elf32_External_Rela));
6009 bfd_elf32_swap_reloca_out (output_bfd,
6010 &outrel, loc);
6011 outrel.r_offset += 4;
6012 outrel.r_info
6013 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6014 }
6015 }
6016 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6017 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6018 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6019 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6020 else if (indx == 0)
6021 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6022 else
6023 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6024 if (indx == 0)
6025 {
6026 outrel.r_addend += relocation;
6027 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6028 outrel.r_addend -= htab->elf.tls_sec->vma;
6029 }
6030 loc = htab->relgot->contents;
6031 loc += (htab->relgot->reloc_count++
6032 * sizeof (Elf32_External_Rela));
6033 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6034 }
6035
6036 /* Init the .got section contents if we're not
6037 emitting a reloc. */
6038 else
6039 {
6040 bfd_vma value = relocation;
6041
6042 if (tls_ty == (TLS_TLS | TLS_LD))
6043 value = 1;
6044 else if (tls_ty != 0)
6045 {
6046 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6047 if (tls_ty == (TLS_TLS | TLS_TPREL))
6048 value += DTP_OFFSET - TP_OFFSET;
6049
6050 if (tls_ty == (TLS_TLS | TLS_GD))
6051 {
6052 bfd_put_32 (output_bfd, value,
6053 htab->got->contents + off + 4);
6054 value = 1;
6055 }
6056 }
6057 bfd_put_32 (output_bfd, value,
6058 htab->got->contents + off);
6059 }
6060
6061 off += 4;
6062 if (tls_ty & (TLS_LD | TLS_GD))
6063 off += 4;
6064 }
6065 while (tls_m != 0);
6066
6067 off = *offp;
6068 *offp = off | 1;
6069 }
6070
6071 if (off >= (bfd_vma) -2)
6072 abort ();
6073
6074 if ((tls_type & TLS_TLS) != 0)
6075 {
6076 if (tls_type != (TLS_TLS | TLS_LD))
6077 {
6078 if ((tls_mask & TLS_LD) != 0
6079 && !(h == NULL
6080 || !h->def_dynamic))
6081 off += 8;
6082 if (tls_type != (TLS_TLS | TLS_GD))
6083 {
6084 if ((tls_mask & TLS_GD) != 0)
6085 off += 8;
6086 if (tls_type != (TLS_TLS | TLS_DTPREL))
6087 {
6088 if ((tls_mask & TLS_DTPREL) != 0)
6089 off += 4;
6090 }
6091 }
6092 }
6093 }
6094
6095 relocation = htab->got->output_offset + off;
6096 relocation -= htab->elf.hgot->root.u.def.value;
6097
6098 /* Addends on got relocations don't make much sense.
6099 x+off@got is actually x@got+off, and since the got is
6100 generated by a hash table traversal, the value in the
6101 got at entry m+n bears little relation to the entry m. */
6102 if (addend != 0)
6103 (*_bfd_error_handler)
6104 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6105 input_bfd,
6106 input_section,
6107 (long) rel->r_offset,
6108 howto->name,
6109 sym_name);
6110 }
6111 break;
6112
6113 /* Relocations that need no special processing. */
6114 case R_PPC_LOCAL24PC:
6115 /* It makes no sense to point a local relocation
6116 at a symbol not in this object. */
6117 if (unresolved_reloc)
6118 {
6119 if (! (*info->callbacks->undefined_symbol) (info,
6120 h->root.root.string,
6121 input_bfd,
6122 input_section,
6123 rel->r_offset,
6124 TRUE))
6125 return FALSE;
6126 continue;
6127 }
6128 break;
6129
6130 case R_PPC_DTPREL16:
6131 case R_PPC_DTPREL16_LO:
6132 case R_PPC_DTPREL16_HI:
6133 case R_PPC_DTPREL16_HA:
6134 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6135 break;
6136
6137 /* Relocations that may need to be propagated if this is a shared
6138 object. */
6139 case R_PPC_TPREL16:
6140 case R_PPC_TPREL16_LO:
6141 case R_PPC_TPREL16_HI:
6142 case R_PPC_TPREL16_HA:
6143 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6144 /* The TPREL16 relocs shouldn't really be used in shared
6145 libs as they will result in DT_TEXTREL being set, but
6146 support them anyway. */
6147 goto dodyn;
6148
6149 case R_PPC_TPREL32:
6150 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6151 goto dodyn;
6152
6153 case R_PPC_DTPREL32:
6154 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6155 goto dodyn;
6156
6157 case R_PPC_DTPMOD32:
6158 relocation = 1;
6159 addend = 0;
6160 goto dodyn;
6161
6162 case R_PPC_REL16:
6163 case R_PPC_REL16_LO:
6164 case R_PPC_REL16_HI:
6165 case R_PPC_REL16_HA:
6166 break;
6167
6168 case R_PPC_REL24:
6169 case R_PPC_REL32:
6170 case R_PPC_REL14:
6171 case R_PPC_REL14_BRTAKEN:
6172 case R_PPC_REL14_BRNTAKEN:
6173 /* If these relocations are not to a named symbol, they can be
6174 handled right here, no need to bother the dynamic linker. */
6175 if (SYMBOL_REFERENCES_LOCAL (info, h)
6176 || h == htab->elf.hgot)
6177 break;
6178 /* fall through */
6179
6180 /* Relocations that always need to be propagated if this is a shared
6181 object. */
6182 case R_PPC_ADDR32:
6183 case R_PPC_ADDR24:
6184 case R_PPC_ADDR16:
6185 case R_PPC_ADDR16_LO:
6186 case R_PPC_ADDR16_HI:
6187 case R_PPC_ADDR16_HA:
6188 case R_PPC_ADDR14:
6189 case R_PPC_ADDR14_BRTAKEN:
6190 case R_PPC_ADDR14_BRNTAKEN:
6191 case R_PPC_UADDR32:
6192 case R_PPC_UADDR16:
6193 /* r_symndx will be zero only for relocs against symbols
6194 from removed linkonce sections, or sections discarded by
6195 a linker script. */
6196 dodyn:
6197 if (r_symndx == 0)
6198 break;
6199 /* Fall thru. */
6200
6201 if ((input_section->flags & SEC_ALLOC) == 0)
6202 break;
6203 /* Fall thru. */
6204
6205 if ((info->shared
6206 && (h == NULL
6207 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6208 || h->root.type != bfd_link_hash_undefweak)
6209 && (MUST_BE_DYN_RELOC (r_type)
6210 || !SYMBOL_CALLS_LOCAL (info, h)))
6211 || (ELIMINATE_COPY_RELOCS
6212 && !info->shared
6213 && h != NULL
6214 && h->dynindx != -1
6215 && !h->non_got_ref
6216 && h->def_dynamic
6217 && !h->def_regular))
6218 {
6219 int skip;
6220
6221 #ifdef DEBUG
6222 fprintf (stderr, "ppc_elf_relocate_section needs to "
6223 "create relocation for %s\n",
6224 (h && h->root.root.string
6225 ? h->root.root.string : "<unknown>"));
6226 #endif
6227
6228 /* When generating a shared object, these relocations
6229 are copied into the output file to be resolved at run
6230 time. */
6231 if (sreloc == NULL)
6232 {
6233 const char *name;
6234
6235 name = (bfd_elf_string_from_elf_section
6236 (input_bfd,
6237 elf_elfheader (input_bfd)->e_shstrndx,
6238 elf_section_data (input_section)->rel_hdr.sh_name));
6239 if (name == NULL)
6240 return FALSE;
6241
6242 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6243 && strcmp (bfd_get_section_name (input_bfd,
6244 input_section),
6245 name + 5) == 0);
6246
6247 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6248 BFD_ASSERT (sreloc != NULL);
6249 }
6250
6251 skip = 0;
6252
6253 outrel.r_offset =
6254 _bfd_elf_section_offset (output_bfd, info, input_section,
6255 rel->r_offset);
6256 if (outrel.r_offset == (bfd_vma) -1
6257 || outrel.r_offset == (bfd_vma) -2)
6258 skip = (int) outrel.r_offset;
6259 outrel.r_offset += (input_section->output_section->vma
6260 + input_section->output_offset);
6261
6262 if (skip)
6263 memset (&outrel, 0, sizeof outrel);
6264 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6265 {
6266 unresolved_reloc = FALSE;
6267 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6268 outrel.r_addend = rel->r_addend;
6269 }
6270 else
6271 {
6272 outrel.r_addend = relocation + rel->r_addend;
6273
6274 if (r_type == R_PPC_ADDR32)
6275 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6276 else
6277 {
6278 long indx;
6279
6280 if (bfd_is_abs_section (sec))
6281 indx = 0;
6282 else if (sec == NULL || sec->owner == NULL)
6283 {
6284 bfd_set_error (bfd_error_bad_value);
6285 return FALSE;
6286 }
6287 else
6288 {
6289 asection *osec;
6290
6291 /* We are turning this relocation into one
6292 against a section symbol. It would be
6293 proper to subtract the symbol's value,
6294 osec->vma, from the emitted reloc addend,
6295 but ld.so expects buggy relocs. */
6296 osec = sec->output_section;
6297 indx = elf_section_data (osec)->dynindx;
6298 BFD_ASSERT (indx > 0);
6299 #ifdef DEBUG
6300 if (indx <= 0)
6301 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6302 indx, osec->name, osec->flags,
6303 h->root.root.string);
6304 #endif
6305 }
6306
6307 outrel.r_info = ELF32_R_INFO (indx, r_type);
6308 }
6309 }
6310
6311 loc = sreloc->contents;
6312 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6313 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6314
6315 if (skip == -1)
6316 continue;
6317
6318 /* This reloc will be computed at runtime. We clear the memory
6319 so that it contains predictable value. */
6320 if (! skip
6321 && ((input_section->flags & SEC_ALLOC) != 0
6322 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6323 {
6324 relocation = howto->pc_relative ? outrel.r_offset : 0;
6325 addend = 0;
6326 break;
6327 }
6328 }
6329 break;
6330
6331 case R_PPC_RELAX32PC_PLT:
6332 case R_PPC_RELAX32_PLT:
6333 {
6334 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6335
6336 if (htab->plt_type == PLT_NEW)
6337 relocation = (htab->glink->output_section->vma
6338 + htab->glink->output_offset
6339 + ent->glink_offset);
6340 else
6341 relocation = (htab->plt->output_section->vma
6342 + htab->plt->output_offset
6343 + ent->plt.offset);
6344 addend = 0;
6345 }
6346 if (r_type == R_PPC_RELAX32_PLT)
6347 goto relax32;
6348 /* Fall thru */
6349
6350 case R_PPC_RELAX32PC:
6351 relocation -= (input_section->output_section->vma
6352 + input_section->output_offset
6353 + rel->r_offset - 4);
6354 /* Fall thru */
6355
6356 case R_PPC_RELAX32:
6357 relax32:
6358 {
6359 unsigned long t0;
6360 unsigned long t1;
6361
6362 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6363 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6364
6365 /* We're clearing the bits for R_PPC_ADDR16_HA
6366 and R_PPC_ADDR16_LO here. */
6367 t0 &= ~0xffff;
6368 t1 &= ~0xffff;
6369
6370 /* t0 is HA, t1 is LO */
6371 relocation += addend;
6372 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6373 t1 |= relocation & 0xffff;
6374
6375 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6376 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6377 }
6378 continue;
6379
6380 /* Indirect .sdata relocation. */
6381 case R_PPC_EMB_SDAI16:
6382 BFD_ASSERT (htab->sdata[0].section != NULL);
6383 relocation
6384 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6385 h, relocation, rel);
6386 break;
6387
6388 /* Indirect .sdata2 relocation. */
6389 case R_PPC_EMB_SDA2I16:
6390 BFD_ASSERT (htab->sdata[1].section != NULL);
6391 relocation
6392 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6393 h, relocation, rel);
6394 break;
6395
6396 /* Handle the TOC16 reloc. We want to use the offset within the .got
6397 section, not the actual VMA. This is appropriate when generating
6398 an embedded ELF object, for which the .got section acts like the
6399 AIX .toc section. */
6400 case R_PPC_TOC16: /* phony GOT16 relocations */
6401 BFD_ASSERT (sec != NULL);
6402 BFD_ASSERT (bfd_is_und_section (sec)
6403 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6404 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6405
6406 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6407 break;
6408
6409 case R_PPC_PLTREL24:
6410 /* Relocation is to the entry for this symbol in the
6411 procedure linkage table. */
6412 {
6413 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6414
6415 addend = 0;
6416 if (ent == NULL
6417 || htab->plt == NULL)
6418 {
6419 /* We didn't make a PLT entry for this symbol. This
6420 happens when statically linking PIC code, or when
6421 using -Bsymbolic. */
6422 break;
6423 }
6424
6425 unresolved_reloc = FALSE;
6426 if (htab->plt_type == PLT_NEW)
6427 relocation = (htab->glink->output_section->vma
6428 + htab->glink->output_offset
6429 + ent->glink_offset);
6430 else
6431 relocation = (htab->plt->output_section->vma
6432 + htab->plt->output_offset
6433 + ent->plt.offset);
6434 }
6435 break;
6436
6437 /* Relocate against _SDA_BASE_. */
6438 case R_PPC_SDAREL16:
6439 {
6440 const char *name;
6441 struct elf_link_hash_entry *sh;
6442
6443 BFD_ASSERT (sec != NULL);
6444 name = bfd_get_section_name (abfd, sec->output_section);
6445 if (! ((strncmp (name, ".sdata", 6) == 0
6446 && (name[6] == 0 || name[6] == '.'))
6447 || (strncmp (name, ".sbss", 5) == 0
6448 && (name[5] == 0 || name[5] == '.'))))
6449 {
6450 (*_bfd_error_handler)
6451 (_("%B: the target (%s) of a %s relocation is "
6452 "in the wrong output section (%s)"),
6453 input_bfd,
6454 sym_name,
6455 howto->name,
6456 name);
6457 }
6458 sh = htab->sdata[0].sym;
6459 addend -= (sh->root.u.def.value
6460 + sh->root.u.def.section->output_offset
6461 + sh->root.u.def.section->output_section->vma);
6462 }
6463 break;
6464
6465 /* Relocate against _SDA2_BASE_. */
6466 case R_PPC_EMB_SDA2REL:
6467 {
6468 const char *name;
6469 struct elf_link_hash_entry *sh;
6470
6471 BFD_ASSERT (sec != NULL);
6472 name = bfd_get_section_name (abfd, sec->output_section);
6473 if (! (strncmp (name, ".sdata2", 7) == 0
6474 || strncmp (name, ".sbss2", 6) == 0))
6475 {
6476 (*_bfd_error_handler)
6477 (_("%B: the target (%s) of a %s relocation is "
6478 "in the wrong output section (%s)"),
6479 input_bfd,
6480 sym_name,
6481 howto->name,
6482 name);
6483
6484 bfd_set_error (bfd_error_bad_value);
6485 ret = FALSE;
6486 continue;
6487 }
6488 sh = htab->sdata[1].sym;
6489 addend -= (sh->root.u.def.value
6490 + sh->root.u.def.section->output_offset
6491 + sh->root.u.def.section->output_section->vma);
6492 }
6493 break;
6494
6495 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6496 case R_PPC_EMB_SDA21:
6497 case R_PPC_EMB_RELSDA:
6498 {
6499 const char *name;
6500 int reg;
6501 struct elf_link_hash_entry *sh;
6502
6503 BFD_ASSERT (sec != NULL);
6504 name = bfd_get_section_name (abfd, sec->output_section);
6505 if (((strncmp (name, ".sdata", 6) == 0
6506 && (name[6] == 0 || name[6] == '.'))
6507 || (strncmp (name, ".sbss", 5) == 0
6508 && (name[5] == 0 || name[5] == '.'))))
6509 {
6510 reg = 13;
6511 sh = htab->sdata[0].sym;
6512 addend -= (sh->root.u.def.value
6513 + sh->root.u.def.section->output_offset
6514 + sh->root.u.def.section->output_section->vma);
6515 }
6516
6517 else if (strncmp (name, ".sdata2", 7) == 0
6518 || strncmp (name, ".sbss2", 6) == 0)
6519 {
6520 reg = 2;
6521 sh = htab->sdata[1].sym;
6522 addend -= (sh->root.u.def.value
6523 + sh->root.u.def.section->output_offset
6524 + sh->root.u.def.section->output_section->vma);
6525 }
6526
6527 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6528 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6529 {
6530 reg = 0;
6531 }
6532
6533 else
6534 {
6535 (*_bfd_error_handler)
6536 (_("%B: the target (%s) of a %s relocation is "
6537 "in the wrong output section (%s)"),
6538 input_bfd,
6539 sym_name,
6540 howto->name,
6541 name);
6542
6543 bfd_set_error (bfd_error_bad_value);
6544 ret = FALSE;
6545 continue;
6546 }
6547
6548 if (r_type == R_PPC_EMB_SDA21)
6549 { /* fill in register field */
6550 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6551 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6552 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6553 }
6554 }
6555 break;
6556
6557 /* Relocate against the beginning of the section. */
6558 case R_PPC_SECTOFF:
6559 case R_PPC_SECTOFF_LO:
6560 case R_PPC_SECTOFF_HI:
6561 case R_PPC_SECTOFF_HA:
6562 BFD_ASSERT (sec != NULL);
6563 addend -= sec->output_section->vma;
6564 break;
6565
6566 /* Negative relocations. */
6567 case R_PPC_EMB_NADDR32:
6568 case R_PPC_EMB_NADDR16:
6569 case R_PPC_EMB_NADDR16_LO:
6570 case R_PPC_EMB_NADDR16_HI:
6571 case R_PPC_EMB_NADDR16_HA:
6572 addend -= 2 * relocation;
6573 break;
6574
6575 case R_PPC_COPY:
6576 case R_PPC_GLOB_DAT:
6577 case R_PPC_JMP_SLOT:
6578 case R_PPC_RELATIVE:
6579 case R_PPC_PLT32:
6580 case R_PPC_PLTREL32:
6581 case R_PPC_PLT16_LO:
6582 case R_PPC_PLT16_HI:
6583 case R_PPC_PLT16_HA:
6584 case R_PPC_ADDR30:
6585 case R_PPC_EMB_RELSEC16:
6586 case R_PPC_EMB_RELST_LO:
6587 case R_PPC_EMB_RELST_HI:
6588 case R_PPC_EMB_RELST_HA:
6589 case R_PPC_EMB_BIT_FLD:
6590 (*_bfd_error_handler)
6591 (_("%B: relocation %s is not yet supported for symbol %s."),
6592 input_bfd,
6593 howto->name,
6594 sym_name);
6595
6596 bfd_set_error (bfd_error_invalid_operation);
6597 ret = FALSE;
6598 continue;
6599 }
6600
6601 /* Do any further special processing. */
6602 switch (r_type)
6603 {
6604 default:
6605 break;
6606
6607 case R_PPC_ADDR16_HA:
6608 case R_PPC_REL16_HA:
6609 case R_PPC_GOT16_HA:
6610 case R_PPC_PLT16_HA:
6611 case R_PPC_SECTOFF_HA:
6612 case R_PPC_TPREL16_HA:
6613 case R_PPC_DTPREL16_HA:
6614 case R_PPC_GOT_TLSGD16_HA:
6615 case R_PPC_GOT_TLSLD16_HA:
6616 case R_PPC_GOT_TPREL16_HA:
6617 case R_PPC_GOT_DTPREL16_HA:
6618 case R_PPC_EMB_NADDR16_HA:
6619 case R_PPC_EMB_RELST_HA:
6620 /* It's just possible that this symbol is a weak symbol
6621 that's not actually defined anywhere. In that case,
6622 'sec' would be NULL, and we should leave the symbol
6623 alone (it will be set to zero elsewhere in the link). */
6624 if (sec != NULL)
6625 /* Add 0x10000 if sign bit in 0:15 is set.
6626 Bits 0:15 are not used. */
6627 addend += 0x8000;
6628 break;
6629 }
6630
6631 #ifdef DEBUG
6632 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6633 "offset = %ld, addend = %ld\n",
6634 howto->name,
6635 (int) r_type,
6636 sym_name,
6637 r_symndx,
6638 (long) rel->r_offset,
6639 (long) addend);
6640 #endif
6641
6642 if (unresolved_reloc
6643 && !((input_section->flags & SEC_DEBUGGING) != 0
6644 && h->def_dynamic))
6645 {
6646 (*_bfd_error_handler)
6647 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6648 input_bfd,
6649 input_section,
6650 (long) rel->r_offset,
6651 howto->name,
6652 sym_name);
6653 ret = FALSE;
6654 }
6655
6656 r = _bfd_final_link_relocate (howto,
6657 input_bfd,
6658 input_section,
6659 contents,
6660 rel->r_offset,
6661 relocation,
6662 addend);
6663
6664 if (r != bfd_reloc_ok)
6665 {
6666 if (r == bfd_reloc_overflow)
6667 {
6668 if (warned)
6669 continue;
6670 if (h != NULL
6671 && h->root.type == bfd_link_hash_undefweak
6672 && howto->pc_relative)
6673 {
6674 /* Assume this is a call protected by other code that
6675 detect the symbol is undefined. If this is the case,
6676 we can safely ignore the overflow. If not, the
6677 program is hosed anyway, and a little warning isn't
6678 going to help. */
6679
6680 continue;
6681 }
6682
6683 if (! (*info->callbacks->reloc_overflow) (info,
6684 (h ? &h->root : NULL),
6685 sym_name,
6686 howto->name,
6687 rel->r_addend,
6688 input_bfd,
6689 input_section,
6690 rel->r_offset))
6691 return FALSE;
6692 }
6693 else
6694 {
6695 (*_bfd_error_handler)
6696 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6697 input_bfd, input_section,
6698 (long) rel->r_offset, howto->name, sym_name, (int) r);
6699 ret = FALSE;
6700 }
6701 }
6702 }
6703
6704 #ifdef DEBUG
6705 fprintf (stderr, "\n");
6706 #endif
6707
6708 return ret;
6709 }
6710 \f
6711 #define PPC_LO(v) ((v) & 0xffff)
6712 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6713 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6714
6715 /* Finish up dynamic symbol handling. We set the contents of various
6716 dynamic sections here. */
6717
6718 static bfd_boolean
6719 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6720 struct bfd_link_info *info,
6721 struct elf_link_hash_entry *h,
6722 Elf_Internal_Sym *sym)
6723 {
6724 struct ppc_elf_link_hash_table *htab;
6725 struct plt_entry *ent;
6726 bfd_boolean doneone;
6727
6728 #ifdef DEBUG
6729 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6730 h->root.root.string);
6731 #endif
6732
6733 htab = ppc_elf_hash_table (info);
6734 BFD_ASSERT (htab->elf.dynobj != NULL);
6735
6736 doneone = FALSE;
6737 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6738 if (ent->plt.offset != (bfd_vma) -1)
6739 {
6740 if (!doneone)
6741 {
6742 Elf_Internal_Rela rela;
6743 bfd_byte *loc;
6744 bfd_vma reloc_index;
6745
6746 if (htab->plt_type == PLT_NEW)
6747 reloc_index = ent->plt.offset / 4;
6748 else
6749 {
6750 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6751 / htab->plt_slot_size);
6752 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6753 && htab->plt_type == PLT_OLD)
6754 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6755 }
6756
6757 /* This symbol has an entry in the procedure linkage table.
6758 Set it up. */
6759 if (htab->plt_type == PLT_VXWORKS)
6760 {
6761 bfd_vma got_offset;
6762 const bfd_vma *plt_entry;
6763
6764 /* The first three entries in .got.plt are reserved. */
6765 got_offset = (reloc_index + 3) * 4;
6766
6767 /* Use the right PLT. */
6768 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6769 : ppc_elf_vxworks_plt_entry;
6770
6771 /* Fill in the .plt on VxWorks. */
6772 if (info->shared)
6773 {
6774 bfd_vma got_offset_hi = (got_offset >> 16)
6775 + ((got_offset & 0x8000) >> 15);
6776
6777 bfd_put_32 (output_bfd,
6778 plt_entry[0] | (got_offset_hi & 0xffff),
6779 htab->plt->contents + ent->plt.offset + 0);
6780 bfd_put_32 (output_bfd,
6781 plt_entry[1] | (got_offset & 0xffff),
6782 htab->plt->contents + ent->plt.offset + 4);
6783 }
6784 else
6785 {
6786 bfd_vma got_loc
6787 = (got_offset
6788 + htab->elf.hgot->root.u.def.value
6789 + htab->elf.hgot->root.u.def.section->output_offset
6790 + htab->elf.hgot->root.u.def.section->output_section->vma);
6791 bfd_vma got_loc_hi = (got_loc >> 16)
6792 + ((got_loc & 0x8000) >> 15);
6793
6794 bfd_put_32 (output_bfd,
6795 plt_entry[0] | (got_loc_hi & 0xffff),
6796 htab->plt->contents + ent->plt.offset + 0);
6797 bfd_put_32 (output_bfd,
6798 plt_entry[1] | (got_loc & 0xffff),
6799 htab->plt->contents + ent->plt.offset + 4);
6800 }
6801
6802 bfd_put_32 (output_bfd, plt_entry[2],
6803 htab->plt->contents + ent->plt.offset + 8);
6804 bfd_put_32 (output_bfd, plt_entry[3],
6805 htab->plt->contents + ent->plt.offset + 12);
6806
6807 /* This instruction is an immediate load. The value loaded is
6808 the byte offset of the R_PPC_JMP_SLOT relocation from the
6809 start of the .rela.plt section. The value is stored in the
6810 low-order 16 bits of the load instruction. */
6811 /* NOTE: It appears that this is now an index rather than a
6812 prescaled offset. */
6813 bfd_put_32 (output_bfd,
6814 plt_entry[4] | reloc_index,
6815 htab->plt->contents + ent->plt.offset + 16);
6816 /* This instruction is a PC-relative branch whose target is
6817 the start of the PLT section. The address of this branch
6818 instruction is 20 bytes beyond the start of this PLT entry.
6819 The address is encoded in bits 6-29, inclusive. The value
6820 stored is right-shifted by two bits, permitting a 26-bit
6821 offset. */
6822 bfd_put_32 (output_bfd,
6823 (plt_entry[5]
6824 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6825 htab->plt->contents + ent->plt.offset + 20);
6826 bfd_put_32 (output_bfd, plt_entry[6],
6827 htab->plt->contents + ent->plt.offset + 24);
6828 bfd_put_32 (output_bfd, plt_entry[7],
6829 htab->plt->contents + ent->plt.offset + 28);
6830
6831 /* Fill in the GOT entry corresponding to this PLT slot with
6832 the address immediately after the the "bctr" instruction
6833 in this PLT entry. */
6834 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6835 + htab->plt->output_offset
6836 + ent->plt.offset + 16),
6837 htab->sgotplt->contents + got_offset);
6838
6839 if (!info->shared)
6840 {
6841 /* Fill in a couple of entries in .rela.plt.unloaded. */
6842 loc = htab->srelplt2->contents
6843 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6844 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6845 * sizeof (Elf32_External_Rela));
6846
6847 /* Provide the @ha relocation for the first instruction. */
6848 rela.r_offset = (htab->plt->output_section->vma
6849 + htab->plt->output_offset
6850 + ent->plt.offset + 2);
6851 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6852 R_PPC_ADDR16_HA);
6853 rela.r_addend = got_offset;
6854 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6855 loc += sizeof (Elf32_External_Rela);
6856
6857 /* Provide the @l relocation for the second instruction. */
6858 rela.r_offset = (htab->plt->output_section->vma
6859 + htab->plt->output_offset
6860 + ent->plt.offset + 6);
6861 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6862 R_PPC_ADDR16_LO);
6863 rela.r_addend = got_offset;
6864 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6865 loc += sizeof (Elf32_External_Rela);
6866
6867 /* Provide a relocation for the GOT entry corresponding to this
6868 PLT slot. Point it at the middle of the .plt entry. */
6869 rela.r_offset = (htab->sgotplt->output_section->vma
6870 + htab->sgotplt->output_offset
6871 + got_offset);
6872 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6873 R_PPC_ADDR32);
6874 rela.r_addend = ent->plt.offset + 16;
6875 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6876 }
6877
6878 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6879 In particular, the offset for the relocation is not the
6880 address of the PLT entry for this function, as specified
6881 by the ABI. Instead, the offset is set to the address of
6882 the GOT slot for this function. See EABI 4.4.4.1. */
6883 rela.r_offset = (htab->sgotplt->output_section->vma
6884 + htab->sgotplt->output_offset
6885 + got_offset);
6886
6887 }
6888 else
6889 {
6890 rela.r_offset = (htab->plt->output_section->vma
6891 + htab->plt->output_offset
6892 + ent->plt.offset);
6893 if (htab->plt_type == PLT_OLD)
6894 {
6895 /* We don't need to fill in the .plt. The ppc dynamic
6896 linker will fill it in. */
6897 }
6898 else
6899 {
6900 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6901 + htab->glink->output_section->vma
6902 + htab->glink->output_offset);
6903 bfd_put_32 (output_bfd, val,
6904 htab->plt->contents + ent->plt.offset);
6905 }
6906 }
6907
6908 /* Fill in the entry in the .rela.plt section. */
6909 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6910 rela.r_addend = 0;
6911
6912 loc = (htab->relplt->contents
6913 + reloc_index * sizeof (Elf32_External_Rela));
6914 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6915
6916 if (!h->def_regular)
6917 {
6918 /* Mark the symbol as undefined, rather than as defined in
6919 the .plt section. Leave the value alone. */
6920 sym->st_shndx = SHN_UNDEF;
6921 /* If the symbol is weak, we do need to clear the value.
6922 Otherwise, the PLT entry would provide a definition for
6923 the symbol even if the symbol wasn't defined anywhere,
6924 and so the symbol would never be NULL. */
6925 if (!h->ref_regular_nonweak)
6926 sym->st_value = 0;
6927 }
6928 doneone = TRUE;
6929 }
6930
6931 if (htab->plt_type == PLT_NEW)
6932 {
6933 bfd_vma plt;
6934 unsigned char *p;
6935
6936 plt = (ent->plt.offset
6937 + htab->plt->output_section->vma
6938 + htab->plt->output_offset);
6939 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6940
6941 if (info->shared || info->pie)
6942 {
6943 bfd_vma got = 0;
6944
6945 if (ent->addend >= 32768)
6946 got = (ent->addend
6947 + ent->sec->output_section->vma
6948 + ent->sec->output_offset);
6949 else if (htab->elf.hgot != NULL)
6950 got = (htab->elf.hgot->root.u.def.value
6951 + htab->elf.hgot->root.u.def.section->output_section->vma
6952 + htab->elf.hgot->root.u.def.section->output_offset);
6953
6954 plt -= got;
6955
6956 if (plt + 0x8000 < 0x10000)
6957 {
6958 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6959 p += 4;
6960 bfd_put_32 (output_bfd, MTCTR_11, p);
6961 p += 4;
6962 bfd_put_32 (output_bfd, BCTR, p);
6963 p += 4;
6964 bfd_put_32 (output_bfd, NOP, p);
6965 p += 4;
6966 }
6967 else
6968 {
6969 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6970 p += 4;
6971 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6972 p += 4;
6973 bfd_put_32 (output_bfd, MTCTR_11, p);
6974 p += 4;
6975 bfd_put_32 (output_bfd, BCTR, p);
6976 p += 4;
6977 }
6978 }
6979 else
6980 {
6981 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6982 p += 4;
6983 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6984 p += 4;
6985 bfd_put_32 (output_bfd, MTCTR_11, p);
6986 p += 4;
6987 bfd_put_32 (output_bfd, BCTR, p);
6988 p += 4;
6989
6990 /* We only need one non-PIC glink stub. */
6991 break;
6992 }
6993 }
6994 else
6995 break;
6996 }
6997
6998 if (h->needs_copy)
6999 {
7000 asection *s;
7001 Elf_Internal_Rela rela;
7002 bfd_byte *loc;
7003
7004 /* This symbols needs a copy reloc. Set it up. */
7005
7006 #ifdef DEBUG
7007 fprintf (stderr, ", copy");
7008 #endif
7009
7010 BFD_ASSERT (h->dynindx != -1);
7011
7012 if (ppc_elf_hash_entry (h)->has_sda_refs)
7013 s = htab->relsbss;
7014 else
7015 s = htab->relbss;
7016 BFD_ASSERT (s != NULL);
7017
7018 rela.r_offset = (h->root.u.def.value
7019 + h->root.u.def.section->output_section->vma
7020 + h->root.u.def.section->output_offset);
7021 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7022 rela.r_addend = 0;
7023 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7024 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7025 }
7026
7027 #ifdef DEBUG
7028 fprintf (stderr, "\n");
7029 #endif
7030
7031 /* Mark some specially defined symbols as absolute. */
7032 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7033 || (!htab->is_vxworks
7034 && (h == htab->elf.hgot
7035 || strcmp (h->root.root.string,
7036 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7037 sym->st_shndx = SHN_ABS;
7038
7039 return TRUE;
7040 }
7041 \f
7042 static enum elf_reloc_type_class
7043 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7044 {
7045 switch (ELF32_R_TYPE (rela->r_info))
7046 {
7047 case R_PPC_RELATIVE:
7048 return reloc_class_relative;
7049 case R_PPC_REL24:
7050 case R_PPC_ADDR24:
7051 case R_PPC_JMP_SLOT:
7052 return reloc_class_plt;
7053 case R_PPC_COPY:
7054 return reloc_class_copy;
7055 default:
7056 return reloc_class_normal;
7057 }
7058 }
7059 \f
7060 /* Finish up the dynamic sections. */
7061
7062 static bfd_boolean
7063 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7064 struct bfd_link_info *info)
7065 {
7066 asection *sdyn;
7067 asection *splt;
7068 struct ppc_elf_link_hash_table *htab;
7069 bfd_vma got;
7070 bfd * dynobj;
7071
7072 #ifdef DEBUG
7073 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7074 #endif
7075
7076 htab = ppc_elf_hash_table (info);
7077 dynobj = elf_hash_table (info)->dynobj;
7078 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7079 if (htab->is_vxworks)
7080 splt = bfd_get_section_by_name (dynobj, ".plt");
7081 else
7082 splt = NULL;
7083
7084 got = 0;
7085 if (htab->elf.hgot != NULL)
7086 got = (htab->elf.hgot->root.u.def.value
7087 + htab->elf.hgot->root.u.def.section->output_section->vma
7088 + htab->elf.hgot->root.u.def.section->output_offset);
7089
7090 if (htab->elf.dynamic_sections_created)
7091 {
7092 Elf32_External_Dyn *dyncon, *dynconend;
7093
7094 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7095
7096 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7097 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7098 for (; dyncon < dynconend; dyncon++)
7099 {
7100 Elf_Internal_Dyn dyn;
7101 asection *s;
7102
7103 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7104
7105 switch (dyn.d_tag)
7106 {
7107 case DT_PLTGOT:
7108 if (htab->is_vxworks)
7109 s = htab->sgotplt;
7110 else
7111 s = htab->plt;
7112 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7113 break;
7114
7115 case DT_PLTRELSZ:
7116 dyn.d_un.d_val = htab->relplt->size;
7117 break;
7118
7119 case DT_JMPREL:
7120 s = htab->relplt;
7121 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7122 break;
7123
7124 case DT_PPC_GOT:
7125 dyn.d_un.d_ptr = got;
7126 break;
7127
7128 case DT_RELASZ:
7129 if (htab->is_vxworks)
7130 {
7131 if (htab->relplt)
7132 dyn.d_un.d_ptr -= htab->relplt->size;
7133 break;
7134 }
7135 continue;
7136
7137 default:
7138 continue;
7139 }
7140
7141 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7142 }
7143 }
7144
7145 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7146 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7147 if (htab->got != NULL)
7148 {
7149 unsigned char *p = htab->got->contents;
7150 bfd_vma val;
7151
7152 p += htab->elf.hgot->root.u.def.value;
7153 if (htab->plt_type == PLT_OLD)
7154 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7155
7156 val = 0;
7157 if (sdyn != NULL)
7158 val = sdyn->output_section->vma + sdyn->output_offset;
7159 bfd_put_32 (output_bfd, val, p);
7160
7161 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7162 }
7163
7164 /* Fill in the first entry in the VxWorks procedure linkage table. */
7165 if (splt && splt->size > 0)
7166 {
7167 /* Use the right PLT. */
7168 static const bfd_vma *plt_entry = NULL;
7169 plt_entry = info->shared ?
7170 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7171
7172 if (!info->shared)
7173 {
7174 bfd_vma got_value =
7175 (htab->elf.hgot->root.u.def.section->output_section->vma
7176 + htab->elf.hgot->root.u.def.section->output_offset
7177 + htab->elf.hgot->root.u.def.value);
7178 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7179
7180 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7181 splt->contents + 0);
7182 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7183 splt->contents + 4);
7184 }
7185 else
7186 {
7187 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7188 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7189 }
7190 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7191 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7192 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7193 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7194 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7195 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7196
7197 if (! info->shared)
7198 {
7199 Elf_Internal_Rela rela;
7200 bfd_byte *loc;
7201
7202 loc = htab->srelplt2->contents;
7203
7204 /* Output the @ha relocation for the first instruction. */
7205 rela.r_offset = (htab->plt->output_section->vma
7206 + htab->plt->output_offset
7207 + 2);
7208 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7209 rela.r_addend = 0;
7210 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7211 loc += sizeof (Elf32_External_Rela);
7212
7213 /* Output the @l relocation for the second instruction. */
7214 rela.r_offset = (htab->plt->output_section->vma
7215 + htab->plt->output_offset
7216 + 6);
7217 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7218 rela.r_addend = 0;
7219 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7220 loc += sizeof (Elf32_External_Rela);
7221
7222 /* Fix up the remaining relocations. They may have the wrong
7223 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7224 in which symbols were output. */
7225 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7226 {
7227 Elf_Internal_Rela rel;
7228
7229 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7230 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7231 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7232 loc += sizeof (Elf32_External_Rela);
7233
7234 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7235 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7236 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7237 loc += sizeof (Elf32_External_Rela);
7238
7239 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7240 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7241 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7242 loc += sizeof (Elf32_External_Rela);
7243 }
7244 }
7245 }
7246
7247 if (htab->glink != NULL && htab->glink->contents != NULL)
7248 {
7249 unsigned char *p;
7250 unsigned char *endp;
7251 bfd_vma res0;
7252 unsigned int i;
7253
7254 /*
7255 * PIC glink code is the following:
7256 *
7257 * # ith PLT code stub.
7258 * addis 11,30,(plt+(i-1)*4-got)@ha
7259 * lwz 11,(plt+(i-1)*4-got)@l(11)
7260 * mtctr 11
7261 * bctr
7262 *
7263 * # A table of branches, one for each plt entry.
7264 * # The idea is that the plt call stub loads ctr (and r11) with these
7265 * # addresses, so (r11 - res_0) gives the plt index * 4.
7266 * res_0: b PLTresolve
7267 * res_1: b PLTresolve
7268 * .
7269 * # Some number of entries towards the end can be nops
7270 * res_n_m3: nop
7271 * res_n_m2: nop
7272 * res_n_m1:
7273 *
7274 * PLTresolve:
7275 * addis 11,11,(1f-res_0)@ha
7276 * mflr 0
7277 * bcl 20,31,1f
7278 * 1: addi 11,11,(1b-res_0)@l
7279 * mflr 12
7280 * mtlr 0
7281 * sub 11,11,12 # r11 = index * 4
7282 * addis 12,12,(got+4-1b)@ha
7283 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7284 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7285 * mtctr 0
7286 * add 0,11,11
7287 * add 11,0,11 # r11 = index * 12 = reloc offset.
7288 * bctr
7289 */
7290 static const unsigned int pic_plt_resolve[] =
7291 {
7292 ADDIS_11_11,
7293 MFLR_0,
7294 BCL_20_31,
7295 ADDI_11_11,
7296 MFLR_12,
7297 MTLR_0,
7298 SUB_11_11_12,
7299 ADDIS_12_12,
7300 LWZ_0_12,
7301 LWZ_12_12,
7302 MTCTR_0,
7303 ADD_0_11_11,
7304 ADD_11_0_11,
7305 BCTR,
7306 NOP,
7307 NOP
7308 };
7309
7310 static const unsigned int plt_resolve[] =
7311 {
7312 LIS_12,
7313 ADDIS_11_11,
7314 LWZ_0_12,
7315 ADDI_11_11,
7316 MTCTR_0,
7317 ADD_0_11_11,
7318 LWZ_12_12,
7319 ADD_11_0_11,
7320 BCTR,
7321 NOP,
7322 NOP,
7323 NOP,
7324 NOP,
7325 NOP,
7326 NOP,
7327 NOP
7328 };
7329
7330 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7331 abort ();
7332 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7333 abort ();
7334
7335 /* Build the branch table, one for each plt entry (less one),
7336 and perhaps some padding. */
7337 p = htab->glink->contents;
7338 p += htab->glink_pltresolve;
7339 endp = htab->glink->contents;
7340 endp += htab->glink->size - GLINK_PLTRESOLVE;
7341 while (p < endp - 8 * 4)
7342 {
7343 bfd_put_32 (output_bfd, B + endp - p, p);
7344 p += 4;
7345 }
7346 while (p < endp)
7347 {
7348 bfd_put_32 (output_bfd, NOP, p);
7349 p += 4;
7350 }
7351
7352 res0 = (htab->glink_pltresolve
7353 + htab->glink->output_section->vma
7354 + htab->glink->output_offset);
7355
7356 /* Last comes the PLTresolve stub. */
7357 if (info->shared || info->pie)
7358 {
7359 bfd_vma bcl;
7360
7361 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7362 {
7363 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7364 p += 4;
7365 }
7366 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7367
7368 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7369 + htab->glink->output_section->vma
7370 + htab->glink->output_offset);
7371
7372 bfd_put_32 (output_bfd,
7373 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7374 bfd_put_32 (output_bfd,
7375 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7376 bfd_put_32 (output_bfd,
7377 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7378 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7379 {
7380 bfd_put_32 (output_bfd,
7381 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7382 bfd_put_32 (output_bfd,
7383 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7384 }
7385 else
7386 {
7387 bfd_put_32 (output_bfd,
7388 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7389 bfd_put_32 (output_bfd,
7390 LWZ_12_12 + 4, p + 9*4);
7391 }
7392 }
7393 else
7394 {
7395 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7396 {
7397 bfd_put_32 (output_bfd, plt_resolve[i], p);
7398 p += 4;
7399 }
7400 p -= 4 * ARRAY_SIZE (plt_resolve);
7401
7402 bfd_put_32 (output_bfd,
7403 LIS_12 + PPC_HA (got + 4), p + 0*4);
7404 bfd_put_32 (output_bfd,
7405 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7406 bfd_put_32 (output_bfd,
7407 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7408 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7409 {
7410 bfd_put_32 (output_bfd,
7411 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7412 bfd_put_32 (output_bfd,
7413 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7414 }
7415 else
7416 {
7417 bfd_put_32 (output_bfd,
7418 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7419 bfd_put_32 (output_bfd,
7420 LWZ_12_12 + 4, p + 6*4);
7421 }
7422 }
7423 }
7424
7425 return TRUE;
7426 }
7427 \f
7428 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7429 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7430 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7431 #define TARGET_BIG_NAME "elf32-powerpc"
7432 #define ELF_ARCH bfd_arch_powerpc
7433 #define ELF_MACHINE_CODE EM_PPC
7434 #ifdef __QNXTARGET__
7435 #define ELF_MAXPAGESIZE 0x1000
7436 #else
7437 #define ELF_MAXPAGESIZE 0x10000
7438 #endif
7439 #define ELF_MINPAGESIZE 0x1000
7440 #define ELF_COMMONPAGESIZE 0x1000
7441 #define elf_info_to_howto ppc_elf_info_to_howto
7442
7443 #ifdef EM_CYGNUS_POWERPC
7444 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7445 #endif
7446
7447 #ifdef EM_PPC_OLD
7448 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7449 #endif
7450
7451 #define elf_backend_plt_not_loaded 1
7452 #define elf_backend_can_gc_sections 1
7453 #define elf_backend_can_refcount 1
7454 #define elf_backend_rela_normal 1
7455
7456 #define bfd_elf32_mkobject ppc_elf_mkobject
7457 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7458 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7459 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7460 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7461 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7462
7463 #define elf_backend_object_p ppc_elf_object_p
7464 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7465 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7466 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7467 #define elf_backend_relocate_section ppc_elf_relocate_section
7468 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7469 #define elf_backend_check_relocs ppc_elf_check_relocs
7470 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7471 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7472 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7473 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7474 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7475 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7476 #define elf_backend_fake_sections ppc_elf_fake_sections
7477 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7478 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7479 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7480 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7481 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7482 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7483 #define elf_backend_write_section ppc_elf_write_section
7484 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7485 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7486 #define elf_backend_action_discarded ppc_elf_action_discarded
7487
7488 #include "elf32-target.h"
7489
7490 /* VxWorks Target */
7491
7492 #undef TARGET_LITTLE_SYM
7493 #undef TARGET_LITTLE_NAME
7494
7495 #undef TARGET_BIG_SYM
7496 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7497 #undef TARGET_BIG_NAME
7498 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7499
7500 /* VxWorks uses the elf default section flags for .plt. */
7501 static const struct bfd_elf_special_section *
7502 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7503 {
7504 if (sec->name == NULL)
7505 return NULL;
7506
7507 if (strcmp (sec->name, ".plt") == 0)
7508 return _bfd_elf_get_sec_type_attr (abfd, sec);
7509
7510 return ppc_elf_get_sec_type_attr (abfd, sec);
7511 }
7512
7513 /* Like ppc_elf_link_hash_table_create, but overrides
7514 appropriately for VxWorks. */
7515 static struct bfd_link_hash_table *
7516 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7517 {
7518 struct bfd_link_hash_table *ret;
7519
7520 ret = ppc_elf_link_hash_table_create (abfd);
7521 if (ret)
7522 {
7523 struct ppc_elf_link_hash_table *htab
7524 = (struct ppc_elf_link_hash_table *)ret;
7525 htab->is_vxworks = 1;
7526 htab->plt_type = PLT_VXWORKS;
7527 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7528 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7529 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7530 }
7531 return ret;
7532 }
7533
7534 /* Tweak magic VxWorks symbols as they are loaded. */
7535 static bfd_boolean
7536 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7537 struct bfd_link_info *info,
7538 Elf_Internal_Sym *sym,
7539 const char **namep ATTRIBUTE_UNUSED,
7540 flagword *flagsp ATTRIBUTE_UNUSED,
7541 asection **secp,
7542 bfd_vma *valp)
7543 {
7544 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7545 valp))
7546 return FALSE;
7547
7548 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7549 }
7550
7551 static void
7552 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7553 {
7554 ppc_elf_final_write_processing(abfd, linker);
7555 elf_vxworks_final_write_processing(abfd, linker);
7556 }
7557
7558 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7559 define it. */
7560 #undef elf_backend_want_plt_sym
7561 #define elf_backend_want_plt_sym 1
7562 #undef elf_backend_want_got_plt
7563 #define elf_backend_want_got_plt 1
7564 #undef elf_backend_got_symbol_offset
7565 #define elf_backend_got_symbol_offset 0
7566 #undef elf_backend_plt_not_loaded
7567 #define elf_backend_plt_not_loaded 0
7568 #undef elf_backend_plt_readonly
7569 #define elf_backend_plt_readonly 1
7570 #undef elf_backend_got_header_size
7571 #define elf_backend_got_header_size 12
7572
7573 #undef bfd_elf32_bfd_link_hash_table_create
7574 #define bfd_elf32_bfd_link_hash_table_create \
7575 ppc_elf_vxworks_link_hash_table_create
7576 #undef elf_backend_add_symbol_hook
7577 #define elf_backend_add_symbol_hook \
7578 ppc_elf_vxworks_add_symbol_hook
7579 #undef elf_backend_link_output_symbol_hook
7580 #define elf_backend_link_output_symbol_hook \
7581 elf_vxworks_link_output_symbol_hook
7582 #undef elf_backend_final_write_processing
7583 #define elf_backend_final_write_processing \
7584 ppc_elf_vxworks_final_write_processing
7585 #undef elf_backend_get_sec_type_attr
7586 #define elf_backend_get_sec_type_attr \
7587 ppc_elf_vxworks_get_sec_type_attr
7588 #undef elf_backend_emit_relocs
7589 #define elf_backend_emit_relocs \
7590 elf_vxworks_emit_relocs
7591
7592 #undef elf32_bed
7593 #define elf32_bed ppc_elf_vxworks_bed
7594
7595 #include "elf32-target.h"
GDB Binutils - Deliverables
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