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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 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 {
1874 asection *s;
1875 int ret = 0;
1876
1877 s = bfd_get_section_by_name (abfd, ".sbss2");
1878 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1879 ++ret;
1880
1881 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 return ret;
1886 }
1887
1888 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1889 .PPC.EMB.sbss0 a normal section, and not a bss section so
1890 that the linker doesn't crater when trying to make more than
1891 2 sections. */
1892
1893 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1894 {
1895 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1896 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1897 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1898 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1899 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1900 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1901 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1902 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1903 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1904 { NULL, 0, 0, 0, 0 }
1905 };
1906
1907 /* This is what we want for new plt/got. */
1908 static struct bfd_elf_special_section ppc_alt_plt =
1909 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
1910
1911 static const struct bfd_elf_special_section *
1912 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1913 {
1914 const struct bfd_elf_special_section *ssect;
1915
1916 /* See if this is one of the special sections. */
1917 if (sec->name == NULL)
1918 return NULL;
1919
1920 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1921 sec->use_rela_p);
1922 if (ssect != NULL)
1923 {
1924 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1925 ssect = &ppc_alt_plt;
1926 return ssect;
1927 }
1928
1929 return _bfd_elf_get_sec_type_attr (abfd, sec);
1930 }
1931 \f
1932 /* Very simple linked list structure for recording apuinfo values. */
1933 typedef struct apuinfo_list
1934 {
1935 struct apuinfo_list *next;
1936 unsigned long value;
1937 }
1938 apuinfo_list;
1939
1940 static apuinfo_list *head;
1941
1942
1943 static void
1944 apuinfo_list_init (void)
1945 {
1946 head = NULL;
1947 }
1948
1949 static void
1950 apuinfo_list_add (unsigned long value)
1951 {
1952 apuinfo_list *entry = head;
1953
1954 while (entry != NULL)
1955 {
1956 if (entry->value == value)
1957 return;
1958 entry = entry->next;
1959 }
1960
1961 entry = bfd_malloc (sizeof (* entry));
1962 if (entry == NULL)
1963 return;
1964
1965 entry->value = value;
1966 entry->next = head;
1967 head = entry;
1968 }
1969
1970 static unsigned
1971 apuinfo_list_length (void)
1972 {
1973 apuinfo_list *entry;
1974 unsigned long count;
1975
1976 for (entry = head, count = 0;
1977 entry;
1978 entry = entry->next)
1979 ++ count;
1980
1981 return count;
1982 }
1983
1984 static inline unsigned long
1985 apuinfo_list_element (unsigned long number)
1986 {
1987 apuinfo_list * entry;
1988
1989 for (entry = head;
1990 entry && number --;
1991 entry = entry->next)
1992 ;
1993
1994 return entry ? entry->value : 0;
1995 }
1996
1997 static void
1998 apuinfo_list_finish (void)
1999 {
2000 apuinfo_list *entry;
2001
2002 for (entry = head; entry;)
2003 {
2004 apuinfo_list *next = entry->next;
2005 free (entry);
2006 entry = next;
2007 }
2008
2009 head = NULL;
2010 }
2011
2012 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2013 #define APUINFO_LABEL "APUinfo"
2014
2015 /* Scan the input BFDs and create a linked list of
2016 the APUinfo values that will need to be emitted. */
2017
2018 static void
2019 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2020 {
2021 bfd *ibfd;
2022 asection *asec;
2023 char *buffer;
2024 unsigned num_input_sections;
2025 bfd_size_type output_section_size;
2026 unsigned i;
2027 unsigned num_entries;
2028 unsigned long offset;
2029 unsigned long length;
2030 const char *error_message = NULL;
2031
2032 if (link_info == NULL)
2033 return;
2034
2035 /* Scan the input bfds, looking for apuinfo sections. */
2036 num_input_sections = 0;
2037 output_section_size = 0;
2038
2039 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2040 {
2041 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2042 if (asec)
2043 {
2044 ++ num_input_sections;
2045 output_section_size += asec->size;
2046 }
2047 }
2048
2049 /* We need at least one input sections
2050 in order to make merging worthwhile. */
2051 if (num_input_sections < 1)
2052 return;
2053
2054 /* Just make sure that the output section exists as well. */
2055 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2056 if (asec == NULL)
2057 return;
2058
2059 /* Allocate a buffer for the contents of the input sections. */
2060 buffer = bfd_malloc (output_section_size);
2061 if (buffer == NULL)
2062 return;
2063
2064 offset = 0;
2065 apuinfo_list_init ();
2066
2067 /* Read in the input sections contents. */
2068 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2069 {
2070 unsigned long datum;
2071 char *ptr;
2072
2073 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2074 if (asec == NULL)
2075 continue;
2076
2077 length = asec->size;
2078 if (length < 24)
2079 {
2080 error_message = _("corrupt or empty %s section in %B");
2081 goto fail;
2082 }
2083
2084 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2085 || (bfd_bread (buffer + offset, length, ibfd) != length))
2086 {
2087 error_message = _("unable to read in %s section from %B");
2088 goto fail;
2089 }
2090
2091 /* Process the contents of the section. */
2092 ptr = buffer + offset;
2093 error_message = _("corrupt %s section in %B");
2094
2095 /* Verify the contents of the header. Note - we have to
2096 extract the values this way in order to allow for a
2097 host whose endian-ness is different from the target. */
2098 datum = bfd_get_32 (ibfd, ptr);
2099 if (datum != sizeof APUINFO_LABEL)
2100 goto fail;
2101
2102 datum = bfd_get_32 (ibfd, ptr + 8);
2103 if (datum != 0x2)
2104 goto fail;
2105
2106 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2107 goto fail;
2108
2109 /* Get the number of bytes used for apuinfo entries. */
2110 datum = bfd_get_32 (ibfd, ptr + 4);
2111 if (datum + 20 != length)
2112 goto fail;
2113
2114 /* Make sure that we do not run off the end of the section. */
2115 if (offset + length > output_section_size)
2116 goto fail;
2117
2118 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2119 for (i = 0; i < datum; i += 4)
2120 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2121
2122 /* Update the offset. */
2123 offset += length;
2124 }
2125
2126 error_message = NULL;
2127
2128 /* Compute the size of the output section. */
2129 num_entries = apuinfo_list_length ();
2130 output_section_size = 20 + num_entries * 4;
2131
2132 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2133
2134 if (! bfd_set_section_size (abfd, asec, output_section_size))
2135 ibfd = abfd,
2136 error_message = _("warning: unable to set size of %s section in %B");
2137
2138 fail:
2139 free (buffer);
2140
2141 if (error_message)
2142 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2143 }
2144
2145 /* Prevent the output section from accumulating the input sections'
2146 contents. We have already stored this in our linked list structure. */
2147
2148 static bfd_boolean
2149 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2150 asection *asec,
2151 bfd_byte *contents ATTRIBUTE_UNUSED)
2152 {
2153 return (apuinfo_list_length ()
2154 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2155 }
2156
2157 /* Finally we can generate the output section. */
2158
2159 static void
2160 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2161 {
2162 bfd_byte *buffer;
2163 asection *asec;
2164 unsigned i;
2165 unsigned num_entries;
2166 bfd_size_type length;
2167
2168 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2169 if (asec == NULL)
2170 return;
2171
2172 if (apuinfo_list_length () == 0)
2173 return;
2174
2175 length = asec->size;
2176 if (length < 20)
2177 return;
2178
2179 buffer = bfd_malloc (length);
2180 if (buffer == NULL)
2181 {
2182 (*_bfd_error_handler)
2183 (_("failed to allocate space for new APUinfo section."));
2184 return;
2185 }
2186
2187 /* Create the apuinfo header. */
2188 num_entries = apuinfo_list_length ();
2189 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2190 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2191 bfd_put_32 (abfd, 0x2, buffer + 8);
2192 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2193
2194 length = 20;
2195 for (i = 0; i < num_entries; i++)
2196 {
2197 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2198 length += 4;
2199 }
2200
2201 if (length != asec->size)
2202 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2203
2204 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2205 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2206
2207 free (buffer);
2208
2209 apuinfo_list_finish ();
2210 }
2211 \f
2212 /* The following functions are specific to the ELF linker, while
2213 functions above are used generally. They appear in this file more
2214 or less in the order in which they are called. eg.
2215 ppc_elf_check_relocs is called early in the link process,
2216 ppc_elf_finish_dynamic_sections is one of the last functions
2217 called. */
2218
2219 /* The PPC linker needs to keep track of the number of relocs that it
2220 decides to copy as dynamic relocs in check_relocs for each symbol.
2221 This is so that it can later discard them if they are found to be
2222 unnecessary. We store the information in a field extending the
2223 regular ELF linker hash table. */
2224
2225 struct ppc_elf_dyn_relocs
2226 {
2227 struct ppc_elf_dyn_relocs *next;
2228
2229 /* The input section of the reloc. */
2230 asection *sec;
2231
2232 /* Total number of relocs copied for the input section. */
2233 bfd_size_type count;
2234
2235 /* Number of pc-relative relocs copied for the input section. */
2236 bfd_size_type pc_count;
2237 };
2238
2239 /* Track PLT entries needed for a given symbol. We might need more
2240 than one glink entry per symbol. */
2241 struct plt_entry
2242 {
2243 struct plt_entry *next;
2244
2245 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2246 This field stores the offset into .got2 used to initialise the
2247 GOT pointer reg. It will always be at least 32768 (and for
2248 current gcc this is the only offset used). */
2249 bfd_vma addend;
2250
2251 /* The .got2 section. */
2252 asection *sec;
2253
2254 /* PLT refcount or offset. */
2255 union
2256 {
2257 bfd_signed_vma refcount;
2258 bfd_vma offset;
2259 } plt;
2260
2261 /* .glink stub offset. */
2262 bfd_vma glink_offset;
2263 };
2264
2265 /* Of those relocs that might be copied as dynamic relocs, this macro
2266 selects those that must be copied when linking a shared library,
2267 even when the symbol is local. */
2268
2269 #define MUST_BE_DYN_RELOC(RTYPE) \
2270 ((RTYPE) != R_PPC_REL24 \
2271 && (RTYPE) != R_PPC_REL14 \
2272 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2273 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2274 && (RTYPE) != R_PPC_REL32)
2275
2276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2277 copying dynamic variables from a shared lib into an app's dynbss
2278 section, and instead use a dynamic relocation to point into the
2279 shared lib. */
2280 #define ELIMINATE_COPY_RELOCS 1
2281
2282 /* PPC ELF linker hash entry. */
2283
2284 struct ppc_elf_link_hash_entry
2285 {
2286 struct elf_link_hash_entry elf;
2287
2288 /* If this symbol is used in the linker created sections, the processor
2289 specific backend uses this field to map the field into the offset
2290 from the beginning of the section. */
2291 elf_linker_section_pointers_t *linker_section_pointer;
2292
2293 /* Track dynamic relocs copied for this symbol. */
2294 struct ppc_elf_dyn_relocs *dyn_relocs;
2295
2296 /* Contexts in which symbol is used in the GOT (or TOC).
2297 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2298 corresponding relocs are encountered during check_relocs.
2299 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2300 indicate the corresponding GOT entry type is not needed. */
2301 #define TLS_GD 1 /* GD reloc. */
2302 #define TLS_LD 2 /* LD reloc. */
2303 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2304 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2305 #define TLS_TLS 16 /* Any TLS reloc. */
2306 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2307 char tls_mask;
2308
2309 /* Nonzero if we have seen a small data relocation referring to this
2310 symbol. */
2311 unsigned char has_sda_refs;
2312 };
2313
2314 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2315
2316 enum ppc_elf_plt_type {
2317 PLT_UNSET,
2318 PLT_OLD,
2319 PLT_NEW,
2320 PLT_VXWORKS
2321 };
2322
2323 /* PPC ELF linker hash table. */
2324
2325 struct ppc_elf_link_hash_table
2326 {
2327 struct elf_link_hash_table elf;
2328
2329 /* Short-cuts to get to dynamic linker sections. */
2330 asection *got;
2331 asection *relgot;
2332 asection *glink;
2333 asection *plt;
2334 asection *relplt;
2335 asection *dynbss;
2336 asection *relbss;
2337 asection *dynsbss;
2338 asection *relsbss;
2339 elf_linker_section_t sdata[2];
2340 asection *sbss;
2341
2342 /* Shortcut to .__tls_get_addr. */
2343 struct elf_link_hash_entry *tls_get_addr;
2344
2345 /* TLS local dynamic got entry handling. */
2346 union {
2347 bfd_signed_vma refcount;
2348 bfd_vma offset;
2349 } tlsld_got;
2350
2351 /* Offset of PltResolve function in glink. */
2352 bfd_vma glink_pltresolve;
2353
2354 /* Size of reserved GOT entries. */
2355 unsigned int got_header_size;
2356 /* Non-zero if allocating the header left a gap. */
2357 unsigned int got_gap;
2358
2359 /* The type of PLT we have chosen to use. */
2360 enum ppc_elf_plt_type plt_type;
2361
2362 /* Whether we can use the new PLT layout. */
2363 unsigned int can_use_new_plt:1;
2364
2365 /* Set if we should emit symbols for stubs. */
2366 unsigned int emit_stub_syms:1;
2367
2368 /* Small local sym to section mapping cache. */
2369 struct sym_sec_cache sym_sec;
2370
2371 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2372 asection *srelplt2;
2373
2374 /* The .got.plt section (VxWorks only)*/
2375 asection *sgotplt;
2376
2377 /* True if the target system is VxWorks. */
2378 int is_vxworks;
2379
2380 /* The size of PLT entries. */
2381 int plt_entry_size;
2382 /* The distance between adjacent PLT slots. */
2383 int plt_slot_size;
2384 /* The size of the first PLT entry. */
2385 int plt_initial_entry_size;
2386 };
2387
2388 /* Get the PPC ELF linker hash table from a link_info structure. */
2389
2390 #define ppc_elf_hash_table(p) \
2391 ((struct ppc_elf_link_hash_table *) (p)->hash)
2392
2393 /* Create an entry in a PPC ELF linker hash table. */
2394
2395 static struct bfd_hash_entry *
2396 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2397 struct bfd_hash_table *table,
2398 const char *string)
2399 {
2400 /* Allocate the structure if it has not already been allocated by a
2401 subclass. */
2402 if (entry == NULL)
2403 {
2404 entry = bfd_hash_allocate (table,
2405 sizeof (struct ppc_elf_link_hash_entry));
2406 if (entry == NULL)
2407 return entry;
2408 }
2409
2410 /* Call the allocation method of the superclass. */
2411 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2412 if (entry != NULL)
2413 {
2414 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2415 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2416 ppc_elf_hash_entry (entry)->tls_mask = 0;
2417 }
2418
2419 return entry;
2420 }
2421
2422 /* Create a PPC ELF linker hash table. */
2423
2424 static struct bfd_link_hash_table *
2425 ppc_elf_link_hash_table_create (bfd *abfd)
2426 {
2427 struct ppc_elf_link_hash_table *ret;
2428
2429 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2430 if (ret == NULL)
2431 return NULL;
2432
2433 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2434 ppc_elf_link_hash_newfunc))
2435 {
2436 free (ret);
2437 return NULL;
2438 }
2439
2440 ret->elf.init_plt_refcount.refcount = 0;
2441 ret->elf.init_plt_refcount.glist = NULL;
2442 ret->elf.init_plt_offset.offset = 0;
2443 ret->elf.init_plt_offset.glist = NULL;
2444
2445 ret->sdata[0].name = ".sdata";
2446 ret->sdata[0].sym_name = "_SDA_BASE_";
2447 ret->sdata[0].bss_name = ".sbss";
2448
2449 ret->sdata[1].name = ".sdata2";
2450 ret->sdata[1].sym_name = "_SDA2_BASE_";
2451 ret->sdata[1].bss_name = ".sbss2";
2452
2453 ret->plt_entry_size = 12;
2454 ret->plt_slot_size = 8;
2455 ret->plt_initial_entry_size = 72;
2456
2457 ret->is_vxworks = 0;
2458
2459 return &ret->elf.root;
2460 }
2461
2462 /* Create .got and the related sections. */
2463
2464 static bfd_boolean
2465 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2466 {
2467 struct ppc_elf_link_hash_table *htab;
2468 asection *s;
2469 flagword flags;
2470
2471 if (!_bfd_elf_create_got_section (abfd, info))
2472 return FALSE;
2473
2474 htab = ppc_elf_hash_table (info);
2475 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2476 if (s == NULL)
2477 abort ();
2478
2479 if (htab->is_vxworks)
2480 {
2481 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2482 if (!htab->sgotplt)
2483 abort ();
2484 }
2485 else
2486 {
2487 /* The powerpc .got has a blrl instruction in it. Mark it
2488 executable. */
2489 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2490 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2491 if (!bfd_set_section_flags (abfd, s, flags))
2492 return FALSE;
2493 }
2494
2495 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2496 | SEC_LINKER_CREATED | SEC_READONLY);
2497 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2498 if (!htab->relgot
2499 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2500 return FALSE;
2501
2502 return TRUE;
2503 }
2504
2505 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2506 to output sections (just like _bfd_elf_create_dynamic_sections has
2507 to create .dynbss and .rela.bss). */
2508
2509 static bfd_boolean
2510 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2511 {
2512 struct ppc_elf_link_hash_table *htab;
2513 asection *s;
2514 flagword flags;
2515
2516 htab = ppc_elf_hash_table (info);
2517
2518 if (htab->got == NULL
2519 && !ppc_elf_create_got (abfd, info))
2520 return FALSE;
2521
2522 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2523 return FALSE;
2524
2525 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2526 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2527
2528 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2529 htab->glink = s;
2530 if (s == NULL
2531 || !bfd_set_section_alignment (abfd, s, 4))
2532 return FALSE;
2533
2534 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2535 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2536 SEC_ALLOC | SEC_LINKER_CREATED);
2537 htab->dynsbss = s;
2538 if (s == NULL)
2539 return FALSE;
2540
2541 if (! info->shared)
2542 {
2543 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2544 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2545 htab->relsbss = s;
2546 if (s == NULL
2547 || ! bfd_set_section_alignment (abfd, s, 2))
2548 return FALSE;
2549 }
2550
2551 if (htab->is_vxworks
2552 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2553 return FALSE;
2554
2555 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2556 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2557 if (s == NULL)
2558 abort ();
2559
2560 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2561 if (htab->plt_type == PLT_VXWORKS)
2562 /* The VxWorks PLT is a loaded section with contents. */
2563 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2564 return bfd_set_section_flags (abfd, s, flags);
2565 }
2566
2567 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2568
2569 static void
2570 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2571 struct elf_link_hash_entry *dir,
2572 struct elf_link_hash_entry *ind)
2573 {
2574 struct ppc_elf_link_hash_entry *edir, *eind;
2575
2576 edir = (struct ppc_elf_link_hash_entry *) dir;
2577 eind = (struct ppc_elf_link_hash_entry *) ind;
2578
2579 if (eind->dyn_relocs != NULL)
2580 {
2581 if (edir->dyn_relocs != NULL)
2582 {
2583 struct ppc_elf_dyn_relocs **pp;
2584 struct ppc_elf_dyn_relocs *p;
2585
2586 /* Add reloc counts against the indirect sym to the direct sym
2587 list. Merge any entries against the same section. */
2588 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2589 {
2590 struct ppc_elf_dyn_relocs *q;
2591
2592 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2593 if (q->sec == p->sec)
2594 {
2595 q->pc_count += p->pc_count;
2596 q->count += p->count;
2597 *pp = p->next;
2598 break;
2599 }
2600 if (q == NULL)
2601 pp = &p->next;
2602 }
2603 *pp = edir->dyn_relocs;
2604 }
2605
2606 edir->dyn_relocs = eind->dyn_relocs;
2607 eind->dyn_relocs = NULL;
2608 }
2609
2610 edir->tls_mask |= eind->tls_mask;
2611 edir->has_sda_refs |= eind->has_sda_refs;
2612
2613 /* If called to transfer flags for a weakdef during processing
2614 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2615 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2616 if (!(ELIMINATE_COPY_RELOCS
2617 && eind->elf.root.type != bfd_link_hash_indirect
2618 && edir->elf.dynamic_adjusted))
2619 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2620
2621 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2622 edir->elf.ref_regular |= eind->elf.ref_regular;
2623 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2624 edir->elf.needs_plt |= eind->elf.needs_plt;
2625
2626 /* If we were called to copy over info for a weak sym, that's all. */
2627 if (eind->elf.root.type != bfd_link_hash_indirect)
2628 return;
2629
2630 /* Copy over the GOT refcount entries that we may have already seen to
2631 the symbol which just became indirect. */
2632 edir->elf.got.refcount += eind->elf.got.refcount;
2633 eind->elf.got.refcount = 0;
2634
2635 /* And plt entries. */
2636 if (eind->elf.plt.plist != NULL)
2637 {
2638 if (edir->elf.plt.plist != NULL)
2639 {
2640 struct plt_entry **entp;
2641 struct plt_entry *ent;
2642
2643 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2644 {
2645 struct plt_entry *dent;
2646
2647 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2648 if (dent->sec == ent->sec && dent->addend == ent->addend)
2649 {
2650 dent->plt.refcount += ent->plt.refcount;
2651 *entp = ent->next;
2652 break;
2653 }
2654 if (dent == NULL)
2655 entp = &ent->next;
2656 }
2657 *entp = edir->elf.plt.plist;
2658 }
2659
2660 edir->elf.plt.plist = eind->elf.plt.plist;
2661 eind->elf.plt.plist = NULL;
2662 }
2663
2664 if (eind->elf.dynindx != -1)
2665 {
2666 if (edir->elf.dynindx != -1)
2667 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2668 edir->elf.dynstr_index);
2669 edir->elf.dynindx = eind->elf.dynindx;
2670 edir->elf.dynstr_index = eind->elf.dynstr_index;
2671 eind->elf.dynindx = -1;
2672 eind->elf.dynstr_index = 0;
2673 }
2674 }
2675
2676 /* Return 1 if target is one of ours. */
2677
2678 static bfd_boolean
2679 is_ppc_elf_target (const struct bfd_target *targ)
2680 {
2681 extern const bfd_target bfd_elf32_powerpc_vec;
2682 extern const bfd_target bfd_elf32_powerpcle_vec;
2683
2684 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2685 }
2686
2687 /* Hook called by the linker routine which adds symbols from an object
2688 file. We use it to put .comm items in .sbss, and not .bss. */
2689
2690 static bfd_boolean
2691 ppc_elf_add_symbol_hook (bfd *abfd,
2692 struct bfd_link_info *info,
2693 Elf_Internal_Sym *sym,
2694 const char **namep ATTRIBUTE_UNUSED,
2695 flagword *flagsp ATTRIBUTE_UNUSED,
2696 asection **secp,
2697 bfd_vma *valp)
2698 {
2699 if (sym->st_shndx == SHN_COMMON
2700 && !info->relocatable
2701 && sym->st_size <= elf_gp_size (abfd)
2702 && is_ppc_elf_target (info->hash->creator))
2703 {
2704 /* Common symbols less than or equal to -G nn bytes are automatically
2705 put into .sbss. */
2706 struct ppc_elf_link_hash_table *htab;
2707
2708 htab = ppc_elf_hash_table (info);
2709 if (htab->sbss == NULL)
2710 {
2711 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2712
2713 if (!htab->elf.dynobj)
2714 htab->elf.dynobj = abfd;
2715
2716 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2717 ".sbss",
2718 flags);
2719 if (htab->sbss == NULL)
2720 return FALSE;
2721 }
2722
2723 *secp = htab->sbss;
2724 *valp = sym->st_size;
2725 }
2726
2727 return TRUE;
2728 }
2729 \f
2730 static bfd_boolean
2731 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2732 elf_linker_section_t *lsect)
2733 {
2734 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2735 TRUE, FALSE, TRUE);
2736 if (lsect->sym == NULL)
2737 return FALSE;
2738 if (lsect->sym->root.type == bfd_link_hash_new)
2739 lsect->sym->non_elf = 0;
2740 lsect->sym->ref_regular = 1;
2741 return TRUE;
2742 }
2743
2744 /* Create a special linker section. */
2745
2746 static bfd_boolean
2747 ppc_elf_create_linker_section (bfd *abfd,
2748 struct bfd_link_info *info,
2749 flagword flags,
2750 elf_linker_section_t *lsect)
2751 {
2752 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2753 asection *s;
2754
2755 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2756 | SEC_LINKER_CREATED);
2757
2758 /* Record the first bfd that needs the special sections. */
2759 if (!htab->elf.dynobj)
2760 htab->elf.dynobj = abfd;
2761
2762 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2763 lsect->name,
2764 flags);
2765 if (s == NULL
2766 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2767 return FALSE;
2768 lsect->section = s;
2769
2770 return create_sdata_sym (htab, lsect);
2771 }
2772
2773 /* Find a linker generated pointer with a given addend and type. */
2774
2775 static elf_linker_section_pointers_t *
2776 elf_find_pointer_linker_section
2777 (elf_linker_section_pointers_t *linker_pointers,
2778 bfd_vma addend,
2779 elf_linker_section_t *lsect)
2780 {
2781 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2782 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2783 return linker_pointers;
2784
2785 return NULL;
2786 }
2787
2788 /* Allocate a pointer to live in a linker created section. */
2789
2790 static bfd_boolean
2791 elf_create_pointer_linker_section (bfd *abfd,
2792 elf_linker_section_t *lsect,
2793 struct elf_link_hash_entry *h,
2794 const Elf_Internal_Rela *rel)
2795 {
2796 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2797 elf_linker_section_pointers_t *linker_section_ptr;
2798 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2799 bfd_size_type amt;
2800
2801 BFD_ASSERT (lsect != NULL);
2802
2803 /* Is this a global symbol? */
2804 if (h != NULL)
2805 {
2806 struct ppc_elf_link_hash_entry *eh;
2807
2808 /* Has this symbol already been allocated? If so, our work is done. */
2809 eh = (struct ppc_elf_link_hash_entry *) h;
2810 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2811 rel->r_addend,
2812 lsect))
2813 return TRUE;
2814
2815 ptr_linker_section_ptr = &eh->linker_section_pointer;
2816 }
2817 else
2818 {
2819 /* Allocation of a pointer to a local symbol. */
2820 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2821
2822 /* Allocate a table to hold the local symbols if first time. */
2823 if (!ptr)
2824 {
2825 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2826
2827 amt = num_symbols;
2828 amt *= sizeof (elf_linker_section_pointers_t *);
2829 ptr = bfd_zalloc (abfd, amt);
2830
2831 if (!ptr)
2832 return FALSE;
2833
2834 elf_local_ptr_offsets (abfd) = ptr;
2835 }
2836
2837 /* Has this symbol already been allocated? If so, our work is done. */
2838 if (elf_find_pointer_linker_section (ptr[r_symndx],
2839 rel->r_addend,
2840 lsect))
2841 return TRUE;
2842
2843 ptr_linker_section_ptr = &ptr[r_symndx];
2844 }
2845
2846 /* Allocate space for a pointer in the linker section, and allocate
2847 a new pointer record from internal memory. */
2848 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2849 amt = sizeof (elf_linker_section_pointers_t);
2850 linker_section_ptr = bfd_alloc (abfd, amt);
2851
2852 if (!linker_section_ptr)
2853 return FALSE;
2854
2855 linker_section_ptr->next = *ptr_linker_section_ptr;
2856 linker_section_ptr->addend = rel->r_addend;
2857 linker_section_ptr->lsect = lsect;
2858 *ptr_linker_section_ptr = linker_section_ptr;
2859
2860 linker_section_ptr->offset = lsect->section->size;
2861 lsect->section->size += 4;
2862
2863 #ifdef DEBUG
2864 fprintf (stderr,
2865 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2866 lsect->name, (long) linker_section_ptr->offset,
2867 (long) lsect->section->size);
2868 #endif
2869
2870 return TRUE;
2871 }
2872
2873 static bfd_boolean
2874 update_local_sym_info (bfd *abfd,
2875 Elf_Internal_Shdr *symtab_hdr,
2876 unsigned long r_symndx,
2877 int tls_type)
2878 {
2879 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2880 char *local_got_tls_masks;
2881
2882 if (local_got_refcounts == NULL)
2883 {
2884 bfd_size_type size = symtab_hdr->sh_info;
2885
2886 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2887 local_got_refcounts = bfd_zalloc (abfd, size);
2888 if (local_got_refcounts == NULL)
2889 return FALSE;
2890 elf_local_got_refcounts (abfd) = local_got_refcounts;
2891 }
2892
2893 local_got_refcounts[r_symndx] += 1;
2894 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2895 local_got_tls_masks[r_symndx] |= tls_type;
2896 return TRUE;
2897 }
2898
2899 static bfd_boolean
2900 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2901 asection *sec, bfd_vma addend)
2902 {
2903 struct plt_entry *ent;
2904
2905 if (addend < 32768)
2906 sec = NULL;
2907 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2908 if (ent->sec == sec && ent->addend == addend)
2909 break;
2910 if (ent == NULL)
2911 {
2912 bfd_size_type amt = sizeof (*ent);
2913 ent = bfd_alloc (abfd, amt);
2914 if (ent == NULL)
2915 return FALSE;
2916 ent->next = h->plt.plist;
2917 ent->sec = sec;
2918 ent->addend = addend;
2919 ent->plt.refcount = 0;
2920 h->plt.plist = ent;
2921 }
2922 ent->plt.refcount += 1;
2923 return TRUE;
2924 }
2925
2926 static struct plt_entry *
2927 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2928 {
2929 struct plt_entry *ent;
2930
2931 if (addend < 32768)
2932 sec = NULL;
2933 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2934 if (ent->sec == sec && ent->addend == addend)
2935 break;
2936 return ent;
2937 }
2938
2939 static void
2940 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2941 {
2942 (*_bfd_error_handler)
2943 (_("%B: relocation %s cannot be used when making a shared object"),
2944 abfd,
2945 ppc_elf_howto_table[r_type]->name);
2946 bfd_set_error (bfd_error_bad_value);
2947 }
2948
2949 /* Look through the relocs for a section during the first phase, and
2950 allocate space in the global offset table or procedure linkage
2951 table. */
2952
2953 static bfd_boolean
2954 ppc_elf_check_relocs (bfd *abfd,
2955 struct bfd_link_info *info,
2956 asection *sec,
2957 const Elf_Internal_Rela *relocs)
2958 {
2959 struct ppc_elf_link_hash_table *htab;
2960 Elf_Internal_Shdr *symtab_hdr;
2961 struct elf_link_hash_entry **sym_hashes;
2962 const Elf_Internal_Rela *rel;
2963 const Elf_Internal_Rela *rel_end;
2964 asection *got2, *sreloc;
2965
2966 if (info->relocatable)
2967 return TRUE;
2968
2969 /* Don't do anything special with non-loaded, non-alloced sections.
2970 In particular, any relocs in such sections should not affect GOT
2971 and PLT reference counting (ie. we don't allow them to create GOT
2972 or PLT entries), there's no possibility or desire to optimize TLS
2973 relocs, and there's not much point in propagating relocs to shared
2974 libs that the dynamic linker won't relocate. */
2975 if ((sec->flags & SEC_ALLOC) == 0)
2976 return TRUE;
2977
2978 #ifdef DEBUG
2979 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2980 sec, abfd);
2981 #endif
2982
2983 /* Initialize howto table if not already done. */
2984 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2985 ppc_elf_howto_init ();
2986
2987 htab = ppc_elf_hash_table (info);
2988 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2989 sym_hashes = elf_sym_hashes (abfd);
2990 got2 = bfd_get_section_by_name (abfd, ".got2");
2991 sreloc = NULL;
2992
2993 rel_end = relocs + sec->reloc_count;
2994 for (rel = relocs; rel < rel_end; rel++)
2995 {
2996 unsigned long r_symndx;
2997 enum elf_ppc_reloc_type r_type;
2998 struct elf_link_hash_entry *h;
2999 int tls_type = 0;
3000
3001 r_symndx = ELF32_R_SYM (rel->r_info);
3002 if (r_symndx < symtab_hdr->sh_info)
3003 h = NULL;
3004 else
3005 {
3006 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3007 while (h->root.type == bfd_link_hash_indirect
3008 || h->root.type == bfd_link_hash_warning)
3009 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3010 }
3011
3012 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3013 This shows up in particular in an R_PPC_ADDR32 in the eabi
3014 startup code. */
3015 if (h != NULL
3016 && htab->got == NULL
3017 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3018 {
3019 if (htab->elf.dynobj == NULL)
3020 htab->elf.dynobj = abfd;
3021 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3022 return FALSE;
3023 BFD_ASSERT (h == htab->elf.hgot);
3024 }
3025
3026 r_type = ELF32_R_TYPE (rel->r_info);
3027 switch (r_type)
3028 {
3029 case R_PPC_GOT_TLSLD16:
3030 case R_PPC_GOT_TLSLD16_LO:
3031 case R_PPC_GOT_TLSLD16_HI:
3032 case R_PPC_GOT_TLSLD16_HA:
3033 htab->tlsld_got.refcount += 1;
3034 tls_type = TLS_TLS | TLS_LD;
3035 goto dogottls;
3036
3037 case R_PPC_GOT_TLSGD16:
3038 case R_PPC_GOT_TLSGD16_LO:
3039 case R_PPC_GOT_TLSGD16_HI:
3040 case R_PPC_GOT_TLSGD16_HA:
3041 tls_type = TLS_TLS | TLS_GD;
3042 goto dogottls;
3043
3044 case R_PPC_GOT_TPREL16:
3045 case R_PPC_GOT_TPREL16_LO:
3046 case R_PPC_GOT_TPREL16_HI:
3047 case R_PPC_GOT_TPREL16_HA:
3048 if (info->shared)
3049 info->flags |= DF_STATIC_TLS;
3050 tls_type = TLS_TLS | TLS_TPREL;
3051 goto dogottls;
3052
3053 case R_PPC_GOT_DTPREL16:
3054 case R_PPC_GOT_DTPREL16_LO:
3055 case R_PPC_GOT_DTPREL16_HI:
3056 case R_PPC_GOT_DTPREL16_HA:
3057 tls_type = TLS_TLS | TLS_DTPREL;
3058 dogottls:
3059 sec->has_tls_reloc = 1;
3060 /* Fall thru */
3061
3062 /* GOT16 relocations */
3063 case R_PPC_GOT16:
3064 case R_PPC_GOT16_LO:
3065 case R_PPC_GOT16_HI:
3066 case R_PPC_GOT16_HA:
3067 /* This symbol requires a global offset table entry. */
3068 if (htab->got == NULL)
3069 {
3070 if (htab->elf.dynobj == NULL)
3071 htab->elf.dynobj = abfd;
3072 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3073 return FALSE;
3074 }
3075 if (h != NULL)
3076 {
3077 h->got.refcount += 1;
3078 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3079 }
3080 else
3081 /* This is a global offset table entry for a local symbol. */
3082 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3083 return FALSE;
3084 break;
3085
3086 /* Indirect .sdata relocation. */
3087 case R_PPC_EMB_SDAI16:
3088 if (info->shared)
3089 {
3090 bad_shared_reloc (abfd, r_type);
3091 return FALSE;
3092 }
3093 if (htab->sdata[0].section == NULL
3094 && !ppc_elf_create_linker_section (abfd, info, 0,
3095 &htab->sdata[0]))
3096 return FALSE;
3097 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3098 h, rel))
3099 return FALSE;
3100 if (h != NULL)
3101 {
3102 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3103 h->non_got_ref = TRUE;
3104 }
3105 break;
3106
3107 /* Indirect .sdata2 relocation. */
3108 case R_PPC_EMB_SDA2I16:
3109 if (info->shared)
3110 {
3111 bad_shared_reloc (abfd, r_type);
3112 return FALSE;
3113 }
3114 if (htab->sdata[1].section == NULL
3115 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3116 &htab->sdata[1]))
3117 return FALSE;
3118 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3119 h, rel))
3120 return FALSE;
3121 if (h != NULL)
3122 {
3123 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3124 h->non_got_ref = TRUE;
3125 }
3126 break;
3127
3128 case R_PPC_SDAREL16:
3129 if (info->shared)
3130 {
3131 bad_shared_reloc (abfd, r_type);
3132 return FALSE;
3133 }
3134 if (htab->sdata[0].sym == NULL
3135 && !create_sdata_sym (htab, &htab->sdata[0]))
3136 return FALSE;
3137 if (h != NULL)
3138 {
3139 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3140 h->non_got_ref = TRUE;
3141 }
3142 break;
3143
3144 case R_PPC_EMB_SDA2REL:
3145 if (info->shared)
3146 {
3147 bad_shared_reloc (abfd, r_type);
3148 return FALSE;
3149 }
3150 if (htab->sdata[1].sym == NULL
3151 && !create_sdata_sym (htab, &htab->sdata[1]))
3152 return FALSE;
3153 if (h != NULL)
3154 {
3155 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3156 h->non_got_ref = TRUE;
3157 }
3158 break;
3159
3160 case R_PPC_EMB_SDA21:
3161 case R_PPC_EMB_RELSDA:
3162 if (info->shared)
3163 {
3164 bad_shared_reloc (abfd, r_type);
3165 return FALSE;
3166 }
3167 if (htab->sdata[0].sym == NULL
3168 && !create_sdata_sym (htab, &htab->sdata[0]))
3169 return FALSE;
3170 if (htab->sdata[1].sym == NULL
3171 && !create_sdata_sym (htab, &htab->sdata[1]))
3172 return FALSE;
3173 if (h != NULL)
3174 {
3175 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3176 h->non_got_ref = TRUE;
3177 }
3178 break;
3179
3180 case R_PPC_EMB_NADDR32:
3181 case R_PPC_EMB_NADDR16:
3182 case R_PPC_EMB_NADDR16_LO:
3183 case R_PPC_EMB_NADDR16_HI:
3184 case R_PPC_EMB_NADDR16_HA:
3185 if (info->shared)
3186 {
3187 bad_shared_reloc (abfd, r_type);
3188 return FALSE;
3189 }
3190 if (h != NULL)
3191 h->non_got_ref = TRUE;
3192 break;
3193
3194 case R_PPC_PLT32:
3195 case R_PPC_PLTREL24:
3196 case R_PPC_PLTREL32:
3197 case R_PPC_PLT16_LO:
3198 case R_PPC_PLT16_HI:
3199 case R_PPC_PLT16_HA:
3200 #ifdef DEBUG
3201 fprintf (stderr, "Reloc requires a PLT entry\n");
3202 #endif
3203 /* This symbol requires a procedure linkage table entry. We
3204 actually build the entry in finish_dynamic_symbol,
3205 because this might be a case of linking PIC code without
3206 linking in any dynamic objects, in which case we don't
3207 need to generate a procedure linkage table after all. */
3208
3209 if (h == NULL)
3210 {
3211 /* It does not make sense to have a procedure linkage
3212 table entry for a local symbol. */
3213 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3214 "local symbol"),
3215 abfd,
3216 sec,
3217 (long) rel->r_offset,
3218 ppc_elf_howto_table[r_type]->name);
3219 bfd_set_error (bfd_error_bad_value);
3220 return FALSE;
3221 }
3222 else
3223 {
3224 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3225
3226 h->needs_plt = 1;
3227 if (!update_plt_info (abfd, h, got2, addend))
3228 return FALSE;
3229 }
3230 break;
3231
3232 /* The following relocations don't need to propagate the
3233 relocation if linking a shared object since they are
3234 section relative. */
3235 case R_PPC_SECTOFF:
3236 case R_PPC_SECTOFF_LO:
3237 case R_PPC_SECTOFF_HI:
3238 case R_PPC_SECTOFF_HA:
3239 case R_PPC_DTPREL16:
3240 case R_PPC_DTPREL16_LO:
3241 case R_PPC_DTPREL16_HI:
3242 case R_PPC_DTPREL16_HA:
3243 case R_PPC_TOC16:
3244 break;
3245
3246 case R_PPC_REL16:
3247 case R_PPC_REL16_LO:
3248 case R_PPC_REL16_HI:
3249 case R_PPC_REL16_HA:
3250 htab->can_use_new_plt = 1;
3251 break;
3252
3253 /* These are just markers. */
3254 case R_PPC_TLS:
3255 case R_PPC_EMB_MRKREF:
3256 case R_PPC_NONE:
3257 case R_PPC_max:
3258 break;
3259
3260 /* These should only appear in dynamic objects. */
3261 case R_PPC_COPY:
3262 case R_PPC_GLOB_DAT:
3263 case R_PPC_JMP_SLOT:
3264 case R_PPC_RELATIVE:
3265 break;
3266
3267 /* These aren't handled yet. We'll report an error later. */
3268 case R_PPC_ADDR30:
3269 case R_PPC_EMB_RELSEC16:
3270 case R_PPC_EMB_RELST_LO:
3271 case R_PPC_EMB_RELST_HI:
3272 case R_PPC_EMB_RELST_HA:
3273 case R_PPC_EMB_BIT_FLD:
3274 break;
3275
3276 /* This refers only to functions defined in the shared library. */
3277 case R_PPC_LOCAL24PC:
3278 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3279 htab->plt_type = PLT_OLD;
3280 break;
3281
3282 /* This relocation describes the C++ object vtable hierarchy.
3283 Reconstruct it for later use during GC. */
3284 case R_PPC_GNU_VTINHERIT:
3285 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3286 return FALSE;
3287 break;
3288
3289 /* This relocation describes which C++ vtable entries are actually
3290 used. Record for later use during GC. */
3291 case R_PPC_GNU_VTENTRY:
3292 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3293 return FALSE;
3294 break;
3295
3296 /* We shouldn't really be seeing these. */
3297 case R_PPC_TPREL32:
3298 if (info->shared)
3299 info->flags |= DF_STATIC_TLS;
3300 goto dodyn;
3301
3302 /* Nor these. */
3303 case R_PPC_DTPMOD32:
3304 case R_PPC_DTPREL32:
3305 goto dodyn;
3306
3307 case R_PPC_TPREL16:
3308 case R_PPC_TPREL16_LO:
3309 case R_PPC_TPREL16_HI:
3310 case R_PPC_TPREL16_HA:
3311 if (info->shared)
3312 info->flags |= DF_STATIC_TLS;
3313 goto dodyn;
3314
3315 case R_PPC_REL32:
3316 if (h == NULL
3317 && got2 != NULL
3318 && (sec->flags & SEC_CODE) != 0
3319 && (info->shared || info->pie)
3320 && htab->plt_type == PLT_UNSET)
3321 {
3322 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3323 the start of a function, which assembles to a REL32
3324 reference to .got2. If we detect one of these, then
3325 force the old PLT layout because the linker cannot
3326 reliably deduce the GOT pointer value needed for
3327 PLT call stubs. */
3328 asection *s;
3329
3330 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3331 r_symndx);
3332 if (s == got2)
3333 htab->plt_type = PLT_OLD;
3334 }
3335 /* fall through */
3336
3337 case R_PPC_REL24:
3338 case R_PPC_REL14:
3339 case R_PPC_REL14_BRTAKEN:
3340 case R_PPC_REL14_BRNTAKEN:
3341 if (h == NULL)
3342 break;
3343 if (h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3344 {
3345 htab->plt_type = PLT_OLD;
3346 break;
3347 }
3348 /* fall through */
3349
3350 case R_PPC_ADDR32:
3351 case R_PPC_ADDR24:
3352 case R_PPC_ADDR16:
3353 case R_PPC_ADDR16_LO:
3354 case R_PPC_ADDR16_HI:
3355 case R_PPC_ADDR16_HA:
3356 case R_PPC_ADDR14:
3357 case R_PPC_ADDR14_BRTAKEN:
3358 case R_PPC_ADDR14_BRNTAKEN:
3359 case R_PPC_UADDR32:
3360 case R_PPC_UADDR16:
3361 if (h != NULL && !info->shared)
3362 {
3363 /* We may need a plt entry if the symbol turns out to be
3364 a function defined in a dynamic object. */
3365 if (!update_plt_info (abfd, h, NULL, 0))
3366 return FALSE;
3367
3368 /* We may need a copy reloc too. */
3369 h->non_got_ref = 1;
3370 }
3371
3372 dodyn:
3373 /* If we are creating a shared library, and this is a reloc
3374 against a global symbol, or a non PC relative reloc
3375 against a local symbol, then we need to copy the reloc
3376 into the shared library. However, if we are linking with
3377 -Bsymbolic, we do not need to copy a reloc against a
3378 global symbol which is defined in an object we are
3379 including in the link (i.e., DEF_REGULAR is set). At
3380 this point we have not seen all the input files, so it is
3381 possible that DEF_REGULAR is not set now but will be set
3382 later (it is never cleared). In case of a weak definition,
3383 DEF_REGULAR may be cleared later by a strong definition in
3384 a shared library. We account for that possibility below by
3385 storing information in the dyn_relocs field of the hash
3386 table entry. A similar situation occurs when creating
3387 shared libraries and symbol visibility changes render the
3388 symbol local.
3389
3390 If on the other hand, we are creating an executable, we
3391 may need to keep relocations for symbols satisfied by a
3392 dynamic library if we manage to avoid copy relocs for the
3393 symbol. */
3394 if ((info->shared
3395 && (MUST_BE_DYN_RELOC (r_type)
3396 || (h != NULL
3397 && (! info->symbolic
3398 || h->root.type == bfd_link_hash_defweak
3399 || !h->def_regular))))
3400 || (ELIMINATE_COPY_RELOCS
3401 && !info->shared
3402 && h != NULL
3403 && (h->root.type == bfd_link_hash_defweak
3404 || !h->def_regular)))
3405 {
3406 struct ppc_elf_dyn_relocs *p;
3407 struct ppc_elf_dyn_relocs **head;
3408
3409 #ifdef DEBUG
3410 fprintf (stderr,
3411 "ppc_elf_check_relocs needs to "
3412 "create relocation for %s\n",
3413 (h && h->root.root.string
3414 ? h->root.root.string : "<unknown>"));
3415 #endif
3416 if (sreloc == NULL)
3417 {
3418 const char *name;
3419
3420 name = (bfd_elf_string_from_elf_section
3421 (abfd,
3422 elf_elfheader (abfd)->e_shstrndx,
3423 elf_section_data (sec)->rel_hdr.sh_name));
3424 if (name == NULL)
3425 return FALSE;
3426
3427 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3428 && strcmp (bfd_get_section_name (abfd, sec),
3429 name + 5) == 0);
3430
3431 if (htab->elf.dynobj == NULL)
3432 htab->elf.dynobj = abfd;
3433 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3434 if (sreloc == NULL)
3435 {
3436 flagword flags;
3437
3438 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3439 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3440 | SEC_ALLOC | SEC_LOAD);
3441 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3442 name,
3443 flags);
3444 if (sreloc == NULL
3445 || ! bfd_set_section_alignment (htab->elf.dynobj,
3446 sreloc, 2))
3447 return FALSE;
3448 }
3449 elf_section_data (sec)->sreloc = sreloc;
3450 }
3451
3452 /* If this is a global symbol, we count the number of
3453 relocations we need for this symbol. */
3454 if (h != NULL)
3455 {
3456 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3457 }
3458 else
3459 {
3460 /* Track dynamic relocs needed for local syms too.
3461 We really need local syms available to do this
3462 easily. Oh well. */
3463
3464 asection *s;
3465 void *vpp;
3466
3467 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3468 sec, r_symndx);
3469 if (s == NULL)
3470 return FALSE;
3471
3472 vpp = &elf_section_data (s)->local_dynrel;
3473 head = (struct ppc_elf_dyn_relocs **) vpp;
3474 }
3475
3476 p = *head;
3477 if (p == NULL || p->sec != sec)
3478 {
3479 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3480 if (p == NULL)
3481 return FALSE;
3482 p->next = *head;
3483 *head = p;
3484 p->sec = sec;
3485 p->count = 0;
3486 p->pc_count = 0;
3487 }
3488
3489 p->count += 1;
3490 if (!MUST_BE_DYN_RELOC (r_type))
3491 p->pc_count += 1;
3492 }
3493
3494 break;
3495 }
3496 }
3497
3498 return TRUE;
3499 }
3500 \f
3501 /* Merge backend specific data from an object file to the output
3502 object file when linking. */
3503
3504 static bfd_boolean
3505 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3506 {
3507 flagword old_flags;
3508 flagword new_flags;
3509 bfd_boolean error;
3510
3511 if (!is_ppc_elf_target (ibfd->xvec)
3512 || !is_ppc_elf_target (obfd->xvec))
3513 return TRUE;
3514
3515 /* Check if we have the same endianess. */
3516 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3517 return FALSE;
3518
3519 new_flags = elf_elfheader (ibfd)->e_flags;
3520 old_flags = elf_elfheader (obfd)->e_flags;
3521 if (!elf_flags_init (obfd))
3522 {
3523 /* First call, no flags set. */
3524 elf_flags_init (obfd) = TRUE;
3525 elf_elfheader (obfd)->e_flags = new_flags;
3526 }
3527
3528 /* Compatible flags are ok. */
3529 else if (new_flags == old_flags)
3530 ;
3531
3532 /* Incompatible flags. */
3533 else
3534 {
3535 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3536 to be linked with either. */
3537 error = FALSE;
3538 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3539 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3540 {
3541 error = TRUE;
3542 (*_bfd_error_handler)
3543 (_("%B: compiled with -mrelocatable and linked with "
3544 "modules compiled normally"), ibfd);
3545 }
3546 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3547 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3548 {
3549 error = TRUE;
3550 (*_bfd_error_handler)
3551 (_("%B: compiled normally and linked with "
3552 "modules compiled with -mrelocatable"), ibfd);
3553 }
3554
3555 /* The output is -mrelocatable-lib iff both the input files are. */
3556 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3557 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3558
3559 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3560 but each input file is either -mrelocatable or -mrelocatable-lib. */
3561 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3562 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3563 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3564 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3565
3566 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3567 any module uses it. */
3568 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3569
3570 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3571 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3572
3573 /* Warn about any other mismatches. */
3574 if (new_flags != old_flags)
3575 {
3576 error = TRUE;
3577 (*_bfd_error_handler)
3578 (_("%B: uses different e_flags (0x%lx) fields "
3579 "than previous modules (0x%lx)"),
3580 ibfd, (long) new_flags, (long) old_flags);
3581 }
3582
3583 if (error)
3584 {
3585 bfd_set_error (bfd_error_bad_value);
3586 return FALSE;
3587 }
3588 }
3589
3590 return TRUE;
3591 }
3592 \f
3593 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3594 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3595 int
3596 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3597 struct bfd_link_info *info,
3598 int force_old_plt,
3599 int emit_stub_syms)
3600 {
3601 struct ppc_elf_link_hash_table *htab;
3602 flagword flags;
3603
3604 htab = ppc_elf_hash_table (info);
3605
3606 if (htab->plt_type == PLT_UNSET)
3607 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3608 ? PLT_OLD : PLT_NEW);
3609
3610 htab->emit_stub_syms = emit_stub_syms;
3611
3612 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3613
3614 if (htab->plt_type == PLT_NEW)
3615 {
3616 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3617 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3618
3619 /* The new PLT is a loaded section. */
3620 if (htab->plt != NULL
3621 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3622 return -1;
3623
3624 /* The new GOT is not executable. */
3625 if (htab->got != NULL
3626 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3627 return -1;
3628 }
3629 else
3630 {
3631 /* Stop an unused .glink section from affecting .text alignment. */
3632 if (htab->glink != NULL
3633 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3634 return -1;
3635 }
3636 return htab->plt_type == PLT_NEW;
3637 }
3638 \f
3639 /* Return the section that should be marked against GC for a given
3640 relocation. */
3641
3642 static asection *
3643 ppc_elf_gc_mark_hook (asection *sec,
3644 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3645 Elf_Internal_Rela *rel,
3646 struct elf_link_hash_entry *h,
3647 Elf_Internal_Sym *sym)
3648 {
3649 if (h != NULL)
3650 {
3651 switch (ELF32_R_TYPE (rel->r_info))
3652 {
3653 case R_PPC_GNU_VTINHERIT:
3654 case R_PPC_GNU_VTENTRY:
3655 break;
3656
3657 default:
3658 switch (h->root.type)
3659 {
3660 case bfd_link_hash_defined:
3661 case bfd_link_hash_defweak:
3662 return h->root.u.def.section;
3663
3664 case bfd_link_hash_common:
3665 return h->root.u.c.p->section;
3666
3667 default:
3668 break;
3669 }
3670 }
3671 }
3672 else
3673 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3674
3675 return NULL;
3676 }
3677
3678 /* Update the got, plt and dynamic reloc reference counts for the
3679 section being removed. */
3680
3681 static bfd_boolean
3682 ppc_elf_gc_sweep_hook (bfd *abfd,
3683 struct bfd_link_info *info,
3684 asection *sec,
3685 const Elf_Internal_Rela *relocs)
3686 {
3687 struct ppc_elf_link_hash_table *htab;
3688 Elf_Internal_Shdr *symtab_hdr;
3689 struct elf_link_hash_entry **sym_hashes;
3690 bfd_signed_vma *local_got_refcounts;
3691 const Elf_Internal_Rela *rel, *relend;
3692 asection *got2;
3693
3694 if ((sec->flags & SEC_ALLOC) == 0)
3695 return TRUE;
3696
3697 elf_section_data (sec)->local_dynrel = NULL;
3698
3699 htab = ppc_elf_hash_table (info);
3700 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3701 sym_hashes = elf_sym_hashes (abfd);
3702 local_got_refcounts = elf_local_got_refcounts (abfd);
3703 got2 = bfd_get_section_by_name (abfd, ".got2");
3704
3705 relend = relocs + sec->reloc_count;
3706 for (rel = relocs; rel < relend; rel++)
3707 {
3708 unsigned long r_symndx;
3709 enum elf_ppc_reloc_type r_type;
3710 struct elf_link_hash_entry *h = NULL;
3711
3712 r_symndx = ELF32_R_SYM (rel->r_info);
3713 if (r_symndx >= symtab_hdr->sh_info)
3714 {
3715 struct ppc_elf_dyn_relocs **pp, *p;
3716 struct ppc_elf_link_hash_entry *eh;
3717
3718 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3719 while (h->root.type == bfd_link_hash_indirect
3720 || h->root.type == bfd_link_hash_warning)
3721 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3722 eh = (struct ppc_elf_link_hash_entry *) h;
3723
3724 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3725 if (p->sec == sec)
3726 {
3727 /* Everything must go for SEC. */
3728 *pp = p->next;
3729 break;
3730 }
3731 }
3732
3733 r_type = ELF32_R_TYPE (rel->r_info);
3734 switch (r_type)
3735 {
3736 case R_PPC_GOT_TLSLD16:
3737 case R_PPC_GOT_TLSLD16_LO:
3738 case R_PPC_GOT_TLSLD16_HI:
3739 case R_PPC_GOT_TLSLD16_HA:
3740 htab->tlsld_got.refcount -= 1;
3741 /* Fall thru */
3742
3743 case R_PPC_GOT_TLSGD16:
3744 case R_PPC_GOT_TLSGD16_LO:
3745 case R_PPC_GOT_TLSGD16_HI:
3746 case R_PPC_GOT_TLSGD16_HA:
3747 case R_PPC_GOT_TPREL16:
3748 case R_PPC_GOT_TPREL16_LO:
3749 case R_PPC_GOT_TPREL16_HI:
3750 case R_PPC_GOT_TPREL16_HA:
3751 case R_PPC_GOT_DTPREL16:
3752 case R_PPC_GOT_DTPREL16_LO:
3753 case R_PPC_GOT_DTPREL16_HI:
3754 case R_PPC_GOT_DTPREL16_HA:
3755 case R_PPC_GOT16:
3756 case R_PPC_GOT16_LO:
3757 case R_PPC_GOT16_HI:
3758 case R_PPC_GOT16_HA:
3759 if (h != NULL)
3760 {
3761 if (h->got.refcount > 0)
3762 h->got.refcount--;
3763 }
3764 else if (local_got_refcounts != NULL)
3765 {
3766 if (local_got_refcounts[r_symndx] > 0)
3767 local_got_refcounts[r_symndx]--;
3768 }
3769 break;
3770
3771 case R_PPC_REL24:
3772 case R_PPC_REL14:
3773 case R_PPC_REL14_BRTAKEN:
3774 case R_PPC_REL14_BRNTAKEN:
3775 case R_PPC_REL32:
3776 if (h == NULL || h == htab->elf.hgot)
3777 break;
3778 /* Fall thru */
3779
3780 case R_PPC_ADDR32:
3781 case R_PPC_ADDR24:
3782 case R_PPC_ADDR16:
3783 case R_PPC_ADDR16_LO:
3784 case R_PPC_ADDR16_HI:
3785 case R_PPC_ADDR16_HA:
3786 case R_PPC_ADDR14:
3787 case R_PPC_ADDR14_BRTAKEN:
3788 case R_PPC_ADDR14_BRNTAKEN:
3789 case R_PPC_UADDR32:
3790 case R_PPC_UADDR16:
3791 if (info->shared)
3792 break;
3793
3794 case R_PPC_PLT32:
3795 case R_PPC_PLTREL24:
3796 case R_PPC_PLTREL32:
3797 case R_PPC_PLT16_LO:
3798 case R_PPC_PLT16_HI:
3799 case R_PPC_PLT16_HA:
3800 if (h != NULL)
3801 {
3802 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3803 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3804 if (ent->plt.refcount > 0)
3805 ent->plt.refcount -= 1;
3806 }
3807 break;
3808
3809 default:
3810 break;
3811 }
3812 }
3813 return TRUE;
3814 }
3815 \f
3816 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3817
3818 asection *
3819 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3820 {
3821 struct ppc_elf_link_hash_table *htab;
3822
3823 htab = ppc_elf_hash_table (info);
3824 if (htab->plt_type == PLT_NEW
3825 && htab->plt != NULL
3826 && htab->plt->output_section != NULL)
3827 {
3828 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3829 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3830 }
3831
3832 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3833 FALSE, FALSE, TRUE);
3834 return _bfd_elf_tls_setup (obfd, info);
3835 }
3836
3837 /* Run through all the TLS relocs looking for optimization
3838 opportunities. */
3839
3840 bfd_boolean
3841 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3842 struct bfd_link_info *info)
3843 {
3844 bfd *ibfd;
3845 asection *sec;
3846 struct ppc_elf_link_hash_table *htab;
3847
3848 if (info->relocatable || info->shared)
3849 return TRUE;
3850
3851 htab = ppc_elf_hash_table (info);
3852 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3853 {
3854 Elf_Internal_Sym *locsyms = NULL;
3855 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3856
3857 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3858 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3859 {
3860 Elf_Internal_Rela *relstart, *rel, *relend;
3861 int expecting_tls_get_addr;
3862
3863 /* Read the relocations. */
3864 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3865 info->keep_memory);
3866 if (relstart == NULL)
3867 return FALSE;
3868
3869 expecting_tls_get_addr = 0;
3870 relend = relstart + sec->reloc_count;
3871 for (rel = relstart; rel < relend; rel++)
3872 {
3873 enum elf_ppc_reloc_type r_type;
3874 unsigned long r_symndx;
3875 struct elf_link_hash_entry *h = NULL;
3876 char *tls_mask;
3877 char tls_set, tls_clear;
3878 bfd_boolean is_local;
3879
3880 r_symndx = ELF32_R_SYM (rel->r_info);
3881 if (r_symndx >= symtab_hdr->sh_info)
3882 {
3883 struct elf_link_hash_entry **sym_hashes;
3884
3885 sym_hashes = elf_sym_hashes (ibfd);
3886 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3887 while (h->root.type == bfd_link_hash_indirect
3888 || h->root.type == bfd_link_hash_warning)
3889 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3890 }
3891
3892 is_local = FALSE;
3893 if (h == NULL
3894 || !h->def_dynamic)
3895 is_local = TRUE;
3896
3897 r_type = ELF32_R_TYPE (rel->r_info);
3898 switch (r_type)
3899 {
3900 case R_PPC_GOT_TLSLD16:
3901 case R_PPC_GOT_TLSLD16_LO:
3902 case R_PPC_GOT_TLSLD16_HI:
3903 case R_PPC_GOT_TLSLD16_HA:
3904 /* These relocs should never be against a symbol
3905 defined in a shared lib. Leave them alone if
3906 that turns out to be the case. */
3907 expecting_tls_get_addr = 0;
3908 htab->tlsld_got.refcount -= 1;
3909 if (!is_local)
3910 continue;
3911
3912 /* LD -> LE */
3913 tls_set = 0;
3914 tls_clear = TLS_LD;
3915 expecting_tls_get_addr = 1;
3916 break;
3917
3918 case R_PPC_GOT_TLSGD16:
3919 case R_PPC_GOT_TLSGD16_LO:
3920 case R_PPC_GOT_TLSGD16_HI:
3921 case R_PPC_GOT_TLSGD16_HA:
3922 if (is_local)
3923 /* GD -> LE */
3924 tls_set = 0;
3925 else
3926 /* GD -> IE */
3927 tls_set = TLS_TLS | TLS_TPRELGD;
3928 tls_clear = TLS_GD;
3929 expecting_tls_get_addr = 1;
3930 break;
3931
3932 case R_PPC_GOT_TPREL16:
3933 case R_PPC_GOT_TPREL16_LO:
3934 case R_PPC_GOT_TPREL16_HI:
3935 case R_PPC_GOT_TPREL16_HA:
3936 expecting_tls_get_addr = 0;
3937 if (is_local)
3938 {
3939 /* IE -> LE */
3940 tls_set = 0;
3941 tls_clear = TLS_TPREL;
3942 break;
3943 }
3944 else
3945 continue;
3946
3947 case R_PPC_REL14:
3948 case R_PPC_REL14_BRTAKEN:
3949 case R_PPC_REL14_BRNTAKEN:
3950 case R_PPC_REL24:
3951 if (expecting_tls_get_addr
3952 && h != NULL
3953 && h == htab->tls_get_addr)
3954 {
3955 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3956 if (ent != NULL && ent->plt.refcount > 0)
3957 ent->plt.refcount -= 1;
3958 }
3959 expecting_tls_get_addr = 0;
3960 continue;
3961
3962 default:
3963 expecting_tls_get_addr = 0;
3964 continue;
3965 }
3966
3967 if (h != NULL)
3968 {
3969 if (tls_set == 0)
3970 {
3971 /* We managed to get rid of a got entry. */
3972 if (h->got.refcount > 0)
3973 h->got.refcount -= 1;
3974 }
3975 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3976 }
3977 else
3978 {
3979 Elf_Internal_Sym *sym;
3980 bfd_signed_vma *lgot_refs;
3981 char *lgot_masks;
3982
3983 if (locsyms == NULL)
3984 {
3985 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3986 if (locsyms == NULL)
3987 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3988 symtab_hdr->sh_info,
3989 0, NULL, NULL, NULL);
3990 if (locsyms == NULL)
3991 {
3992 if (elf_section_data (sec)->relocs != relstart)
3993 free (relstart);
3994 return FALSE;
3995 }
3996 }
3997 sym = locsyms + r_symndx;
3998 lgot_refs = elf_local_got_refcounts (ibfd);
3999 if (lgot_refs == NULL)
4000 abort ();
4001 if (tls_set == 0)
4002 {
4003 /* We managed to get rid of a got entry. */
4004 if (lgot_refs[r_symndx] > 0)
4005 lgot_refs[r_symndx] -= 1;
4006 }
4007 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4008 tls_mask = &lgot_masks[r_symndx];
4009 }
4010
4011 *tls_mask |= tls_set;
4012 *tls_mask &= ~tls_clear;
4013 }
4014
4015 if (elf_section_data (sec)->relocs != relstart)
4016 free (relstart);
4017 }
4018
4019 if (locsyms != NULL
4020 && (symtab_hdr->contents != (unsigned char *) locsyms))
4021 {
4022 if (!info->keep_memory)
4023 free (locsyms);
4024 else
4025 symtab_hdr->contents = (unsigned char *) locsyms;
4026 }
4027 }
4028 return TRUE;
4029 }
4030 \f
4031 /* Adjust a symbol defined by a dynamic object and referenced by a
4032 regular object. The current definition is in some section of the
4033 dynamic object, but we're not including those sections. We have to
4034 change the definition to something the rest of the link can
4035 understand. */
4036
4037 static bfd_boolean
4038 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4039 struct elf_link_hash_entry *h)
4040 {
4041 struct ppc_elf_link_hash_table *htab;
4042 asection *s;
4043 unsigned int power_of_two;
4044
4045 #ifdef DEBUG
4046 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4047 h->root.root.string);
4048 #endif
4049
4050 /* Make sure we know what is going on here. */
4051 htab = ppc_elf_hash_table (info);
4052 BFD_ASSERT (htab->elf.dynobj != NULL
4053 && (h->needs_plt
4054 || h->u.weakdef != NULL
4055 || (h->def_dynamic
4056 && h->ref_regular
4057 && !h->def_regular)));
4058
4059 /* Deal with function syms. */
4060 if (h->type == STT_FUNC
4061 || h->needs_plt)
4062 {
4063 /* Clear procedure linkage table information for any symbol that
4064 won't need a .plt entry. */
4065 struct plt_entry *ent;
4066 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4067 if (ent->plt.refcount > 0)
4068 break;
4069 if (ent == NULL
4070 || SYMBOL_CALLS_LOCAL (info, h)
4071 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4072 && h->root.type == bfd_link_hash_undefweak))
4073 {
4074 /* A PLT entry is not required/allowed when:
4075
4076 1. We are not using ld.so; because then the PLT entry
4077 can't be set up, so we can't use one. In this case,
4078 ppc_elf_adjust_dynamic_symbol won't even be called.
4079
4080 2. GC has rendered the entry unused.
4081
4082 3. We know for certain that a call to this symbol
4083 will go to this object, or will remain undefined. */
4084 h->plt.plist = NULL;
4085 h->needs_plt = 0;
4086 }
4087 return TRUE;
4088 }
4089 else
4090 h->plt.plist = NULL;
4091
4092 /* If this is a weak symbol, and there is a real definition, the
4093 processor independent code will have arranged for us to see the
4094 real definition first, and we can just use the same value. */
4095 if (h->u.weakdef != NULL)
4096 {
4097 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4098 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4099 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4100 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4101 if (ELIMINATE_COPY_RELOCS)
4102 h->non_got_ref = h->u.weakdef->non_got_ref;
4103 return TRUE;
4104 }
4105
4106 /* This is a reference to a symbol defined by a dynamic object which
4107 is not a function. */
4108
4109 /* If we are creating a shared library, we must presume that the
4110 only references to the symbol are via the global offset table.
4111 For such cases we need not do anything here; the relocations will
4112 be handled correctly by relocate_section. */
4113 if (info->shared)
4114 return TRUE;
4115
4116 /* If there are no references to this symbol that do not use the
4117 GOT, we don't need to generate a copy reloc. */
4118 if (!h->non_got_ref)
4119 return TRUE;
4120
4121 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4122 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4123 do this if there are any small data relocations. */
4124 if (ELIMINATE_COPY_RELOCS
4125 && !ppc_elf_hash_entry (h)->has_sda_refs)
4126 {
4127 struct ppc_elf_dyn_relocs *p;
4128 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4129 {
4130 s = p->sec->output_section;
4131 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4132 break;
4133 }
4134
4135 if (p == NULL)
4136 {
4137 h->non_got_ref = 0;
4138 return TRUE;
4139 }
4140 }
4141
4142 if (h->size == 0)
4143 {
4144 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4145 h->root.root.string);
4146 return TRUE;
4147 }
4148
4149 /* We must allocate the symbol in our .dynbss section, which will
4150 become part of the .bss section of the executable. There will be
4151 an entry for this symbol in the .dynsym section. The dynamic
4152 object will contain position independent code, so all references
4153 from the dynamic object to this symbol will go through the global
4154 offset table. The dynamic linker will use the .dynsym entry to
4155 determine the address it must put in the global offset table, so
4156 both the dynamic object and the regular object will refer to the
4157 same memory location for the variable.
4158
4159 Of course, if the symbol is referenced using SDAREL relocs, we
4160 must instead allocate it in .sbss. */
4161
4162 if (ppc_elf_hash_entry (h)->has_sda_refs)
4163 s = htab->dynsbss;
4164 else
4165 s = htab->dynbss;
4166 BFD_ASSERT (s != NULL);
4167
4168 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4169 copy the initial value out of the dynamic object and into the
4170 runtime process image. We need to remember the offset into the
4171 .rela.bss section we are going to use. */
4172 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4173 {
4174 asection *srel;
4175
4176 if (ppc_elf_hash_entry (h)->has_sda_refs)
4177 srel = htab->relsbss;
4178 else
4179 srel = htab->relbss;
4180 BFD_ASSERT (srel != NULL);
4181 srel->size += sizeof (Elf32_External_Rela);
4182 h->needs_copy = 1;
4183 }
4184
4185 /* We need to figure out the alignment required for this symbol. I
4186 have no idea how ELF linkers handle this. */
4187 power_of_two = bfd_log2 (h->size);
4188 if (power_of_two > 4)
4189 power_of_two = 4;
4190
4191 /* Apply the required alignment. */
4192 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4193 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4194 {
4195 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4196 return FALSE;
4197 }
4198
4199 /* Define the symbol as being at this point in the section. */
4200 h->root.u.def.section = s;
4201 h->root.u.def.value = s->size;
4202
4203 /* Increment the section size to make room for the symbol. */
4204 s->size += h->size;
4205
4206 return TRUE;
4207 }
4208 \f
4209 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4210 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4211 specifying the addend on the plt relocation. For -fpic code, the sym
4212 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4213 xxxxxxxx.got2.plt_pic32.<callee>. */
4214
4215 static bfd_boolean
4216 add_stub_sym (struct plt_entry *ent,
4217 struct elf_link_hash_entry *h,
4218 struct bfd_link_info *info)
4219 {
4220 struct elf_link_hash_entry *sh;
4221 size_t len1, len2, len3;
4222 char *name;
4223 const char *stub;
4224 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4225
4226 if (info->shared || info->pie)
4227 stub = ".plt_pic32.";
4228 else
4229 stub = ".plt_call32.";
4230
4231 len1 = strlen (h->root.root.string);
4232 len2 = strlen (stub);
4233 len3 = 0;
4234 if (ent->sec)
4235 len3 = strlen (ent->sec->name);
4236 name = bfd_malloc (len1 + len2 + len3 + 9);
4237 if (name == NULL)
4238 return FALSE;
4239 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4240 if (ent->sec)
4241 memcpy (name + 8, ent->sec->name, len3);
4242 memcpy (name + 8 + len3, stub, len2);
4243 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4244 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4245 if (sh == NULL)
4246 return FALSE;
4247 if (sh->root.type == bfd_link_hash_new)
4248 {
4249 sh->root.type = bfd_link_hash_defined;
4250 sh->root.u.def.section = htab->glink;
4251 sh->root.u.def.value = ent->glink_offset;
4252 sh->ref_regular = 1;
4253 sh->def_regular = 1;
4254 sh->ref_regular_nonweak = 1;
4255 sh->forced_local = 1;
4256 sh->non_elf = 0;
4257 }
4258 return TRUE;
4259 }
4260
4261 /* Allocate NEED contiguous space in .got, and return the offset.
4262 Handles allocation of the got header when crossing 32k. */
4263
4264 static bfd_vma
4265 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4266 {
4267 bfd_vma where;
4268 unsigned int max_before_header;
4269
4270 if (htab->plt_type == PLT_VXWORKS)
4271 {
4272 where = htab->got->size;
4273 htab->got->size += need;
4274 }
4275 else
4276 {
4277 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4278 if (need <= htab->got_gap)
4279 {
4280 where = max_before_header - htab->got_gap;
4281 htab->got_gap -= need;
4282 }
4283 else
4284 {
4285 if (htab->got->size + need > max_before_header
4286 && htab->got->size <= max_before_header)
4287 {
4288 htab->got_gap = max_before_header - htab->got->size;
4289 htab->got->size = max_before_header + htab->got_header_size;
4290 }
4291 where = htab->got->size;
4292 htab->got->size += need;
4293 }
4294 }
4295 return where;
4296 }
4297
4298 /* Allocate space in associated reloc sections for dynamic relocs. */
4299
4300 static bfd_boolean
4301 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4302 {
4303 struct bfd_link_info *info = inf;
4304 struct ppc_elf_link_hash_entry *eh;
4305 struct ppc_elf_link_hash_table *htab;
4306 struct ppc_elf_dyn_relocs *p;
4307
4308 if (h->root.type == bfd_link_hash_indirect)
4309 return TRUE;
4310
4311 if (h->root.type == bfd_link_hash_warning)
4312 /* When warning symbols are created, they **replace** the "real"
4313 entry in the hash table, thus we never get to see the real
4314 symbol in a hash traversal. So look at it now. */
4315 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4316
4317 htab = ppc_elf_hash_table (info);
4318 if (htab->elf.dynamic_sections_created)
4319 {
4320 struct plt_entry *ent;
4321 bfd_boolean doneone = FALSE;
4322 bfd_vma plt_offset = 0, glink_offset = 0;
4323
4324 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4325 if (ent->plt.refcount > 0)
4326 {
4327 /* Make sure this symbol is output as a dynamic symbol. */
4328 if (h->dynindx == -1
4329 && !h->forced_local)
4330 {
4331 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4332 return FALSE;
4333 }
4334
4335 if (info->shared
4336 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4337 {
4338 asection *s = htab->plt;
4339
4340 if (htab->plt_type == PLT_NEW)
4341 {
4342 if (!doneone)
4343 {
4344 plt_offset = s->size;
4345 s->size += 4;
4346 }
4347 ent->plt.offset = plt_offset;
4348
4349 s = htab->glink;
4350 if (!doneone || info->shared || info->pie)
4351 {
4352 glink_offset = s->size;
4353 s->size += GLINK_ENTRY_SIZE;
4354 }
4355 if (!doneone
4356 && !info->shared
4357 && !h->def_regular)
4358 {
4359 h->root.u.def.section = s;
4360 h->root.u.def.value = glink_offset;
4361 }
4362 ent->glink_offset = glink_offset;
4363
4364 if (htab->emit_stub_syms
4365 && !add_stub_sym (ent, h, info))
4366 return FALSE;
4367 }
4368 else
4369 {
4370 if (!doneone)
4371 {
4372 /* If this is the first .plt entry, make room
4373 for the special first entry. */
4374 if (s->size == 0)
4375 s->size += htab->plt_initial_entry_size;
4376
4377 /* The PowerPC PLT is actually composed of two
4378 parts, the first part is 2 words (for a load
4379 and a jump), and then there is a remaining
4380 word available at the end. */
4381 plt_offset = (htab->plt_initial_entry_size
4382 + (htab->plt_slot_size
4383 * ((s->size
4384 - htab->plt_initial_entry_size)
4385 / htab->plt_entry_size)));
4386
4387 /* If this symbol is not defined in a regular
4388 file, and we are not generating a shared
4389 library, then set the symbol to this location
4390 in the .plt. This is required to make
4391 function pointers compare as equal between
4392 the normal executable and the shared library. */
4393 if (! info->shared
4394 && !h->def_regular)
4395 {
4396 h->root.u.def.section = s;
4397 h->root.u.def.value = plt_offset;
4398 }
4399
4400 /* Make room for this entry. */
4401 s->size += htab->plt_entry_size;
4402 /* After the 8192nd entry, room for two entries
4403 is allocated. */
4404 if (htab->plt_type == PLT_OLD
4405 && (s->size - htab->plt_initial_entry_size)
4406 / htab->plt_entry_size
4407 > PLT_NUM_SINGLE_ENTRIES)
4408 s->size += htab->plt_entry_size;
4409 }
4410 ent->plt.offset = plt_offset;
4411 }
4412
4413 /* We also need to make an entry in the .rela.plt section. */
4414 if (!doneone)
4415 {
4416 htab->relplt->size += sizeof (Elf32_External_Rela);
4417
4418 if (htab->plt_type == PLT_VXWORKS)
4419 {
4420 /* Allocate space for the unloaded relocations. */
4421 if (!info->shared)
4422 {
4423 if (ent->plt.offset
4424 == (bfd_vma) htab->plt_initial_entry_size)
4425 {
4426 htab->srelplt2->size
4427 += sizeof (Elf32_External_Rela)
4428 * VXWORKS_PLTRESOLVE_RELOCS;
4429 }
4430
4431 htab->srelplt2->size
4432 += sizeof (Elf32_External_Rela)
4433 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4434 }
4435
4436 /* Every PLT entry has an associated GOT entry in
4437 .got.plt. */
4438 htab->sgotplt->size += 4;
4439 }
4440 doneone = TRUE;
4441 }
4442 }
4443 else
4444 ent->plt.offset = (bfd_vma) -1;
4445
4446 if (!doneone)
4447 {
4448 h->plt.plist = NULL;
4449 h->needs_plt = 0;
4450 }
4451 }
4452 }
4453 else
4454 {
4455 h->plt.plist = NULL;
4456 h->needs_plt = 0;
4457 }
4458
4459 eh = (struct ppc_elf_link_hash_entry *) h;
4460 if (eh->elf.got.refcount > 0)
4461 {
4462 /* Make sure this symbol is output as a dynamic symbol. */
4463 if (eh->elf.dynindx == -1
4464 && !eh->elf.forced_local)
4465 {
4466 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4467 return FALSE;
4468 }
4469
4470 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4471 && !eh->elf.def_dynamic)
4472 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4473 eh->elf.got.offset = (bfd_vma) -1;
4474 else
4475 {
4476 bfd_boolean dyn;
4477 unsigned int need = 0;
4478 if ((eh->tls_mask & TLS_TLS) != 0)
4479 {
4480 if ((eh->tls_mask & TLS_LD) != 0)
4481 need += 8;
4482 if ((eh->tls_mask & TLS_GD) != 0)
4483 need += 8;
4484 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4485 need += 4;
4486 if ((eh->tls_mask & TLS_DTPREL) != 0)
4487 need += 4;
4488 }
4489 else
4490 need += 4;
4491 eh->elf.got.offset = allocate_got (htab, need);
4492 dyn = htab->elf.dynamic_sections_created;
4493 if ((info->shared
4494 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4495 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4496 || eh->elf.root.type != bfd_link_hash_undefweak))
4497 {
4498 /* All the entries we allocated need relocs.
4499 Except LD only needs one. */
4500 if ((eh->tls_mask & TLS_LD) != 0)
4501 need -= 4;
4502 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4503 }
4504 }
4505 }
4506 else
4507 eh->elf.got.offset = (bfd_vma) -1;
4508
4509 if (eh->dyn_relocs == NULL)
4510 return TRUE;
4511
4512 /* In the shared -Bsymbolic case, discard space allocated for
4513 dynamic pc-relative relocs against symbols which turn out to be
4514 defined in regular objects. For the normal shared case, discard
4515 space for relocs that have become local due to symbol visibility
4516 changes. */
4517
4518 if (info->shared)
4519 {
4520 /* Relocs that use pc_count are those that appear on a call insn,
4521 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4522 generated via assembly. We want calls to protected symbols to
4523 resolve directly to the function rather than going via the plt.
4524 If people want function pointer comparisons to work as expected
4525 then they should avoid writing weird assembly. */
4526 if (SYMBOL_CALLS_LOCAL (info, h))
4527 {
4528 struct ppc_elf_dyn_relocs **pp;
4529
4530 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4531 {
4532 p->count -= p->pc_count;
4533 p->pc_count = 0;
4534 if (p->count == 0)
4535 *pp = p->next;
4536 else
4537 pp = &p->next;
4538 }
4539 }
4540
4541 /* Also discard relocs on undefined weak syms with non-default
4542 visibility. */
4543 if (eh->dyn_relocs != NULL
4544 && h->root.type == bfd_link_hash_undefweak)
4545 {
4546 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4547 eh->dyn_relocs = NULL;
4548
4549 /* Make sure undefined weak symbols are output as a dynamic
4550 symbol in PIEs. */
4551 else if (h->dynindx == -1
4552 && !h->forced_local)
4553 {
4554 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4555 return FALSE;
4556 }
4557 }
4558 }
4559 else if (ELIMINATE_COPY_RELOCS)
4560 {
4561 /* For the non-shared case, discard space for relocs against
4562 symbols which turn out to need copy relocs or are not
4563 dynamic. */
4564
4565 if (!h->non_got_ref
4566 && h->def_dynamic
4567 && !h->def_regular)
4568 {
4569 /* Make sure this symbol is output as a dynamic symbol.
4570 Undefined weak syms won't yet be marked as dynamic. */
4571 if (h->dynindx == -1
4572 && !h->forced_local)
4573 {
4574 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4575 return FALSE;
4576 }
4577
4578 /* If that succeeded, we know we'll be keeping all the
4579 relocs. */
4580 if (h->dynindx != -1)
4581 goto keep;
4582 }
4583
4584 eh->dyn_relocs = NULL;
4585
4586 keep: ;
4587 }
4588
4589 /* Finally, allocate space. */
4590 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4591 {
4592 asection *sreloc = elf_section_data (p->sec)->sreloc;
4593 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4594 }
4595
4596 return TRUE;
4597 }
4598
4599 /* Find any dynamic relocs that apply to read-only sections. */
4600
4601 static bfd_boolean
4602 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4603 {
4604 struct ppc_elf_dyn_relocs *p;
4605
4606 if (h->root.type == bfd_link_hash_indirect)
4607 return TRUE;
4608
4609 if (h->root.type == bfd_link_hash_warning)
4610 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4611
4612 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4613 {
4614 asection *s = p->sec->output_section;
4615
4616 if (s != NULL
4617 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4618 == (SEC_READONLY | SEC_ALLOC)))
4619 {
4620 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4621
4622 /* Not an error, just cut short the traversal. */
4623 return FALSE;
4624 }
4625 }
4626 return TRUE;
4627 }
4628
4629 /* Set the sizes of the dynamic sections. */
4630
4631 static bfd_boolean
4632 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4633 struct bfd_link_info *info)
4634 {
4635 struct ppc_elf_link_hash_table *htab;
4636 asection *s;
4637 bfd_boolean relocs;
4638 bfd *ibfd;
4639
4640 #ifdef DEBUG
4641 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4642 #endif
4643
4644 htab = ppc_elf_hash_table (info);
4645 BFD_ASSERT (htab->elf.dynobj != NULL);
4646
4647 if (elf_hash_table (info)->dynamic_sections_created)
4648 {
4649 /* Set the contents of the .interp section to the interpreter. */
4650 if (info->executable)
4651 {
4652 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4653 BFD_ASSERT (s != NULL);
4654 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4655 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4656 }
4657 }
4658
4659 if (htab->plt_type == PLT_OLD)
4660 htab->got_header_size = 16;
4661 else if (htab->plt_type == PLT_NEW)
4662 htab->got_header_size = 12;
4663
4664 /* Set up .got offsets for local syms, and space for local dynamic
4665 relocs. */
4666 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4667 {
4668 bfd_signed_vma *local_got;
4669 bfd_signed_vma *end_local_got;
4670 char *lgot_masks;
4671 bfd_size_type locsymcount;
4672 Elf_Internal_Shdr *symtab_hdr;
4673
4674 if (!is_ppc_elf_target (ibfd->xvec))
4675 continue;
4676
4677 for (s = ibfd->sections; s != NULL; s = s->next)
4678 {
4679 struct ppc_elf_dyn_relocs *p;
4680
4681 for (p = ((struct ppc_elf_dyn_relocs *)
4682 elf_section_data (s)->local_dynrel);
4683 p != NULL;
4684 p = p->next)
4685 {
4686 if (!bfd_is_abs_section (p->sec)
4687 && bfd_is_abs_section (p->sec->output_section))
4688 {
4689 /* Input section has been discarded, either because
4690 it is a copy of a linkonce section or due to
4691 linker script /DISCARD/, so we'll be discarding
4692 the relocs too. */
4693 }
4694 else if (p->count != 0)
4695 {
4696 elf_section_data (p->sec)->sreloc->size
4697 += p->count * sizeof (Elf32_External_Rela);
4698 if ((p->sec->output_section->flags
4699 & (SEC_READONLY | SEC_ALLOC))
4700 == (SEC_READONLY | SEC_ALLOC))
4701 info->flags |= DF_TEXTREL;
4702 }
4703 }
4704 }
4705
4706 local_got = elf_local_got_refcounts (ibfd);
4707 if (!local_got)
4708 continue;
4709
4710 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4711 locsymcount = symtab_hdr->sh_info;
4712 end_local_got = local_got + locsymcount;
4713 lgot_masks = (char *) end_local_got;
4714 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4715 if (*local_got > 0)
4716 {
4717 if (*lgot_masks == (TLS_TLS | TLS_LD))
4718 {
4719 /* If just an LD reloc, we'll just use
4720 htab->tlsld_got.offset. */
4721 htab->tlsld_got.refcount += 1;
4722 *local_got = (bfd_vma) -1;
4723 }
4724 else
4725 {
4726 unsigned int need = 0;
4727 if ((*lgot_masks & TLS_TLS) != 0)
4728 {
4729 if ((*lgot_masks & TLS_GD) != 0)
4730 need += 8;
4731 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4732 need += 4;
4733 if ((*lgot_masks & TLS_DTPREL) != 0)
4734 need += 4;
4735 }
4736 else
4737 need += 4;
4738 *local_got = allocate_got (htab, need);
4739 if (info->shared)
4740 htab->relgot->size += (need
4741 * (sizeof (Elf32_External_Rela) / 4));
4742 }
4743 }
4744 else
4745 *local_got = (bfd_vma) -1;
4746 }
4747
4748 if (htab->tlsld_got.refcount > 0)
4749 {
4750 htab->tlsld_got.offset = allocate_got (htab, 8);
4751 if (info->shared)
4752 htab->relgot->size += sizeof (Elf32_External_Rela);
4753 }
4754 else
4755 htab->tlsld_got.offset = (bfd_vma) -1;
4756
4757 /* Allocate space for global sym dynamic relocs. */
4758 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4759
4760 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4761 {
4762 unsigned int g_o_t = 32768;
4763
4764 /* If we haven't allocated the header, do so now. When we get here,
4765 for old plt/got the got size will be 0 to 32764 (not allocated),
4766 or 32780 to 65536 (header allocated). For new plt/got, the
4767 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4768 if (htab->got->size <= 32768)
4769 {
4770 g_o_t = htab->got->size;
4771 if (htab->plt_type == PLT_OLD)
4772 g_o_t += 4;
4773 htab->got->size += htab->got_header_size;
4774 }
4775
4776 htab->elf.hgot->root.u.def.value = g_o_t;
4777 }
4778
4779 if (htab->glink != NULL && htab->glink->size != 0)
4780 {
4781 htab->glink_pltresolve = htab->glink->size;
4782 /* Space for the branch table. */
4783 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4784 /* Pad out to align the start of PLTresolve. */
4785 htab->glink->size += -htab->glink->size & 15;
4786 htab->glink->size += GLINK_PLTRESOLVE;
4787
4788 if (htab->emit_stub_syms)
4789 {
4790 struct elf_link_hash_entry *sh;
4791 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4792 TRUE, FALSE, FALSE);
4793 if (sh == NULL)
4794 return FALSE;
4795 if (sh->root.type == bfd_link_hash_new)
4796 {
4797 sh->root.type = bfd_link_hash_defined;
4798 sh->root.u.def.section = htab->glink;
4799 sh->root.u.def.value = htab->glink_pltresolve;
4800 sh->ref_regular = 1;
4801 sh->def_regular = 1;
4802 sh->ref_regular_nonweak = 1;
4803 sh->forced_local = 1;
4804 sh->non_elf = 0;
4805 }
4806 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4807 TRUE, FALSE, FALSE);
4808 if (sh == NULL)
4809 return FALSE;
4810 if (sh->root.type == bfd_link_hash_new)
4811 {
4812 sh->root.type = bfd_link_hash_defined;
4813 sh->root.u.def.section = htab->glink;
4814 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4815 sh->ref_regular = 1;
4816 sh->def_regular = 1;
4817 sh->ref_regular_nonweak = 1;
4818 sh->forced_local = 1;
4819 sh->non_elf = 0;
4820 }
4821 }
4822 }
4823
4824 /* We've now determined the sizes of the various dynamic sections.
4825 Allocate memory for them. */
4826 relocs = FALSE;
4827 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4828 {
4829 bfd_boolean strip_section = TRUE;
4830
4831 if ((s->flags & SEC_LINKER_CREATED) == 0)
4832 continue;
4833
4834 if (s == htab->plt
4835 || s == htab->glink
4836 || s == htab->got
4837 || s == htab->sgotplt
4838 || s == htab->sbss
4839 || s == htab->dynbss
4840 || s == htab->dynsbss)
4841 {
4842 /* We'd like to strip these sections if they aren't needed, but if
4843 we've exported dynamic symbols from them we must leave them.
4844 It's too late to tell BFD to get rid of the symbols. */
4845 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4846 strip_section = FALSE;
4847 /* Strip this section if we don't need it; see the
4848 comment below. */
4849 }
4850 else if (s == htab->sdata[0].section
4851 || s == htab->sdata[1].section)
4852 {
4853 /* Strip these too. */
4854 }
4855 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4856 {
4857 if (s->size != 0)
4858 {
4859 /* Remember whether there are any relocation sections. */
4860 relocs = TRUE;
4861
4862 /* We use the reloc_count field as a counter if we need
4863 to copy relocs into the output file. */
4864 s->reloc_count = 0;
4865 }
4866 }
4867 else
4868 {
4869 /* It's not one of our sections, so don't allocate space. */
4870 continue;
4871 }
4872
4873 if (s->size == 0 && strip_section)
4874 {
4875 /* If we don't need this section, strip it from the
4876 output file. This is mostly to handle .rela.bss and
4877 .rela.plt. We must create both sections in
4878 create_dynamic_sections, because they must be created
4879 before the linker maps input sections to output
4880 sections. The linker does that before
4881 adjust_dynamic_symbol is called, and it is that
4882 function which decides whether anything needs to go
4883 into these sections. */
4884 s->flags |= SEC_EXCLUDE;
4885 continue;
4886 }
4887
4888 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4889 continue;
4890
4891 /* Allocate memory for the section contents. */
4892 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4893 if (s->contents == NULL)
4894 return FALSE;
4895 }
4896
4897 if (htab->elf.dynamic_sections_created)
4898 {
4899 /* Add some entries to the .dynamic section. We fill in the
4900 values later, in ppc_elf_finish_dynamic_sections, but we
4901 must add the entries now so that we get the correct size for
4902 the .dynamic section. The DT_DEBUG entry is filled in by the
4903 dynamic linker and used by the debugger. */
4904 #define add_dynamic_entry(TAG, VAL) \
4905 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4906
4907 if (info->executable)
4908 {
4909 if (!add_dynamic_entry (DT_DEBUG, 0))
4910 return FALSE;
4911 }
4912
4913 if (htab->plt != NULL && htab->plt->size != 0)
4914 {
4915 if (!add_dynamic_entry (DT_PLTGOT, 0)
4916 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4917 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4918 || !add_dynamic_entry (DT_JMPREL, 0))
4919 return FALSE;
4920 }
4921
4922 if (htab->glink != NULL && htab->glink->size != 0)
4923 {
4924 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4925 return FALSE;
4926 }
4927
4928 if (relocs)
4929 {
4930 if (!add_dynamic_entry (DT_RELA, 0)
4931 || !add_dynamic_entry (DT_RELASZ, 0)
4932 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4933 return FALSE;
4934 }
4935
4936 /* If any dynamic relocs apply to a read-only section, then we
4937 need a DT_TEXTREL entry. */
4938 if ((info->flags & DF_TEXTREL) == 0)
4939 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4940 info);
4941
4942 if ((info->flags & DF_TEXTREL) != 0)
4943 {
4944 if (!add_dynamic_entry (DT_TEXTREL, 0))
4945 return FALSE;
4946 }
4947 }
4948 #undef add_dynamic_entry
4949
4950 return TRUE;
4951 }
4952 \f
4953 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4954
4955 static const int shared_stub_entry[] =
4956 {
4957 0x7c0802a6, /* mflr 0 */
4958 0x429f0005, /* bcl 20, 31, .Lxxx */
4959 0x7d6802a6, /* mflr 11 */
4960 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4961 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4962 0x7c0803a6, /* mtlr 0 */
4963 0x7d6903a6, /* mtctr 11 */
4964 0x4e800420, /* bctr */
4965 };
4966
4967 static const int stub_entry[] =
4968 {
4969 0x3d600000, /* lis 11,xxx@ha */
4970 0x396b0000, /* addi 11,11,xxx@l */
4971 0x7d6903a6, /* mtctr 11 */
4972 0x4e800420, /* bctr */
4973 };
4974
4975 static bfd_boolean
4976 ppc_elf_relax_section (bfd *abfd,
4977 asection *isec,
4978 struct bfd_link_info *link_info,
4979 bfd_boolean *again)
4980 {
4981 struct one_fixup
4982 {
4983 struct one_fixup *next;
4984 asection *tsec;
4985 bfd_vma toff;
4986 bfd_vma trampoff;
4987 };
4988
4989 Elf_Internal_Shdr *symtab_hdr;
4990 bfd_byte *contents = NULL;
4991 Elf_Internal_Sym *isymbuf = NULL;
4992 Elf_Internal_Rela *internal_relocs = NULL;
4993 Elf_Internal_Rela *irel, *irelend;
4994 struct one_fixup *fixups = NULL;
4995 bfd_boolean changed;
4996 struct ppc_elf_link_hash_table *htab;
4997 bfd_size_type trampoff;
4998 asection *got2;
4999
5000 *again = FALSE;
5001
5002 /* Nothing to do if there are no relocations, and no need to do
5003 anything with non-alloc sections. */
5004 if ((isec->flags & SEC_ALLOC) == 0
5005 || (isec->flags & SEC_RELOC) == 0
5006 || isec->reloc_count == 0)
5007 return TRUE;
5008
5009 trampoff = (isec->size + 3) & (bfd_vma) -4;
5010 /* Space for a branch around any trampolines. */
5011 trampoff += 4;
5012
5013 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5014
5015 /* Get a copy of the native relocations. */
5016 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5017 link_info->keep_memory);
5018 if (internal_relocs == NULL)
5019 goto error_return;
5020
5021 htab = ppc_elf_hash_table (link_info);
5022 got2 = bfd_get_section_by_name (abfd, ".got2");
5023
5024 irelend = internal_relocs + isec->reloc_count;
5025 for (irel = internal_relocs; irel < irelend; irel++)
5026 {
5027 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5028 bfd_vma symaddr, reladdr, toff, roff;
5029 asection *tsec;
5030 struct one_fixup *f;
5031 size_t insn_offset = 0;
5032 bfd_vma max_branch_offset, val;
5033 bfd_byte *hit_addr;
5034 unsigned long t0;
5035 unsigned char sym_type;
5036
5037 switch (r_type)
5038 {
5039 case R_PPC_REL24:
5040 case R_PPC_LOCAL24PC:
5041 case R_PPC_PLTREL24:
5042 max_branch_offset = 1 << 25;
5043 break;
5044
5045 case R_PPC_REL14:
5046 case R_PPC_REL14_BRTAKEN:
5047 case R_PPC_REL14_BRNTAKEN:
5048 max_branch_offset = 1 << 15;
5049 break;
5050
5051 default:
5052 continue;
5053 }
5054
5055 /* Get the value of the symbol referred to by the reloc. */
5056 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5057 {
5058 /* A local symbol. */
5059 Elf_Internal_Sym *isym;
5060
5061 /* Read this BFD's local symbols. */
5062 if (isymbuf == NULL)
5063 {
5064 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5065 if (isymbuf == NULL)
5066 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5067 symtab_hdr->sh_info, 0,
5068 NULL, NULL, NULL);
5069 if (isymbuf == 0)
5070 goto error_return;
5071 }
5072 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5073 if (isym->st_shndx == SHN_UNDEF)
5074 continue; /* We can't do anything with undefined symbols. */
5075 else if (isym->st_shndx == SHN_ABS)
5076 tsec = bfd_abs_section_ptr;
5077 else if (isym->st_shndx == SHN_COMMON)
5078 tsec = bfd_com_section_ptr;
5079 else
5080 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5081
5082 toff = isym->st_value;
5083 sym_type = ELF_ST_TYPE (isym->st_info);
5084 }
5085 else
5086 {
5087 /* Global symbol handling. */
5088 unsigned long indx;
5089 struct elf_link_hash_entry *h;
5090
5091 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5092 h = elf_sym_hashes (abfd)[indx];
5093
5094 while (h->root.type == bfd_link_hash_indirect
5095 || h->root.type == bfd_link_hash_warning)
5096 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5097
5098 tsec = NULL;
5099 toff = 0;
5100 if (r_type == R_PPC_PLTREL24
5101 && htab->plt != NULL)
5102 {
5103 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5104
5105 if (ent != NULL)
5106 {
5107 if (htab->plt_type == PLT_NEW)
5108 {
5109 tsec = htab->glink;
5110 toff = ent->glink_offset;
5111 }
5112 else
5113 {
5114 tsec = htab->plt;
5115 toff = ent->plt.offset;
5116 }
5117 }
5118 }
5119 if (tsec != NULL)
5120 ;
5121 else if (h->root.type == bfd_link_hash_defined
5122 || h->root.type == bfd_link_hash_defweak)
5123 {
5124 tsec = h->root.u.def.section;
5125 toff = h->root.u.def.value;
5126 }
5127 else
5128 continue;
5129
5130 sym_type = h->type;
5131 }
5132
5133 /* If the branch and target are in the same section, you have
5134 no hope of adding stubs. We'll error out later should the
5135 branch overflow. */
5136 if (tsec == isec)
5137 continue;
5138
5139 /* There probably isn't any reason to handle symbols in
5140 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5141 attribute for a code section, and we are only looking at
5142 branches. However, implement it correctly here as a
5143 reference for other target relax_section functions. */
5144 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5145 {
5146 /* At this stage in linking, no SEC_MERGE symbol has been
5147 adjusted, so all references to such symbols need to be
5148 passed through _bfd_merged_section_offset. (Later, in
5149 relocate_section, all SEC_MERGE symbols *except* for
5150 section symbols have been adjusted.)
5151
5152 gas may reduce relocations against symbols in SEC_MERGE
5153 sections to a relocation against the section symbol when
5154 the original addend was zero. When the reloc is against
5155 a section symbol we should include the addend in the
5156 offset passed to _bfd_merged_section_offset, since the
5157 location of interest is the original symbol. On the
5158 other hand, an access to "sym+addend" where "sym" is not
5159 a section symbol should not include the addend; Such an
5160 access is presumed to be an offset from "sym"; The
5161 location of interest is just "sym". */
5162 if (sym_type == STT_SECTION)
5163 toff += irel->r_addend;
5164
5165 toff = _bfd_merged_section_offset (abfd, &tsec,
5166 elf_section_data (tsec)->sec_info,
5167 toff);
5168
5169 if (sym_type != STT_SECTION)
5170 toff += irel->r_addend;
5171 }
5172 /* PLTREL24 addends are special. */
5173 else if (r_type != R_PPC_PLTREL24)
5174 toff += irel->r_addend;
5175
5176 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5177
5178 roff = irel->r_offset;
5179 reladdr = isec->output_section->vma + isec->output_offset + roff;
5180
5181 /* If the branch is in range, no need to do anything. */
5182 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5183 continue;
5184
5185 /* Look for an existing fixup to this address. */
5186 for (f = fixups; f ; f = f->next)
5187 if (f->tsec == tsec && f->toff == toff)
5188 break;
5189
5190 if (f == NULL)
5191 {
5192 size_t size;
5193 unsigned long stub_rtype;
5194
5195 val = trampoff - roff;
5196 if (val >= max_branch_offset)
5197 /* Oh dear, we can't reach a trampoline. Don't try to add
5198 one. We'll report an error later. */
5199 continue;
5200
5201 if (link_info->shared)
5202 {
5203 size = 4 * ARRAY_SIZE (shared_stub_entry);
5204 insn_offset = 12;
5205 stub_rtype = R_PPC_RELAX32PC;
5206 }
5207 else
5208 {
5209 size = 4 * ARRAY_SIZE (stub_entry);
5210 insn_offset = 0;
5211 stub_rtype = R_PPC_RELAX32;
5212 }
5213
5214 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5215 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5216 abort ();
5217 if (tsec == htab->plt
5218 || tsec == htab->glink)
5219 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5220
5221 /* Hijack the old relocation. Since we need two
5222 relocations for this use a "composite" reloc. */
5223 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5224 stub_rtype);
5225 irel->r_offset = trampoff + insn_offset;
5226
5227 /* Record the fixup so we don't do it again this section. */
5228 f = bfd_malloc (sizeof (*f));
5229 f->next = fixups;
5230 f->tsec = tsec;
5231 f->toff = toff;
5232 f->trampoff = trampoff;
5233 fixups = f;
5234
5235 trampoff += size;
5236 }
5237 else
5238 {
5239 val = f->trampoff - roff;
5240 if (val >= max_branch_offset)
5241 continue;
5242
5243 /* Nop out the reloc, since we're finalizing things here. */
5244 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5245 }
5246
5247 /* Get the section contents. */
5248 if (contents == NULL)
5249 {
5250 /* Get cached copy if it exists. */
5251 if (elf_section_data (isec)->this_hdr.contents != NULL)
5252 contents = elf_section_data (isec)->this_hdr.contents;
5253 else
5254 {
5255 /* Go get them off disk. */
5256 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5257 goto error_return;
5258 }
5259 }
5260
5261 /* Fix up the existing branch to hit the trampoline. */
5262 hit_addr = contents + roff;
5263 switch (r_type)
5264 {
5265 case R_PPC_REL24:
5266 case R_PPC_LOCAL24PC:
5267 case R_PPC_PLTREL24:
5268 t0 = bfd_get_32 (abfd, hit_addr);
5269 t0 &= ~0x3fffffc;
5270 t0 |= val & 0x3fffffc;
5271 bfd_put_32 (abfd, t0, hit_addr);
5272 break;
5273
5274 case R_PPC_REL14:
5275 case R_PPC_REL14_BRTAKEN:
5276 case R_PPC_REL14_BRNTAKEN:
5277 t0 = bfd_get_32 (abfd, hit_addr);
5278 t0 &= ~0xfffc;
5279 t0 |= val & 0xfffc;
5280 bfd_put_32 (abfd, t0, hit_addr);
5281 break;
5282 }
5283 }
5284
5285 /* Write out the trampolines. */
5286 changed = fixups != NULL;
5287 if (fixups != NULL)
5288 {
5289 const int *stub;
5290 bfd_byte *dest;
5291 bfd_vma val;
5292 int i, size;
5293
5294 do
5295 {
5296 struct one_fixup *f = fixups;
5297 fixups = fixups->next;
5298 free (f);
5299 }
5300 while (fixups);
5301
5302 contents = bfd_realloc (contents, trampoff);
5303 if (contents == NULL)
5304 goto error_return;
5305
5306 isec->size = (isec->size + 3) & (bfd_vma) -4;
5307 /* Branch around the trampolines. */
5308 val = trampoff - isec->size + 0x48000000;
5309 dest = contents + isec->size;
5310 isec->size = trampoff;
5311 bfd_put_32 (abfd, val, dest);
5312 dest += 4;
5313
5314 if (link_info->shared)
5315 {
5316 stub = shared_stub_entry;
5317 size = ARRAY_SIZE (shared_stub_entry);
5318 }
5319 else
5320 {
5321 stub = stub_entry;
5322 size = ARRAY_SIZE (stub_entry);
5323 }
5324
5325 i = 0;
5326 while (dest < contents + trampoff)
5327 {
5328 bfd_put_32 (abfd, stub[i], dest);
5329 i++;
5330 if (i == size)
5331 i = 0;
5332 dest += 4;
5333 }
5334 BFD_ASSERT (i == 0);
5335 }
5336
5337 if (isymbuf != NULL
5338 && symtab_hdr->contents != (unsigned char *) isymbuf)
5339 {
5340 if (! link_info->keep_memory)
5341 free (isymbuf);
5342 else
5343 {
5344 /* Cache the symbols for elf_link_input_bfd. */
5345 symtab_hdr->contents = (unsigned char *) isymbuf;
5346 }
5347 }
5348
5349 if (contents != NULL
5350 && elf_section_data (isec)->this_hdr.contents != contents)
5351 {
5352 if (!changed && !link_info->keep_memory)
5353 free (contents);
5354 else
5355 {
5356 /* Cache the section contents for elf_link_input_bfd. */
5357 elf_section_data (isec)->this_hdr.contents = contents;
5358 }
5359 }
5360
5361 if (elf_section_data (isec)->relocs != internal_relocs)
5362 {
5363 if (!changed)
5364 free (internal_relocs);
5365 else
5366 elf_section_data (isec)->relocs = internal_relocs;
5367 }
5368
5369 *again = changed;
5370 return TRUE;
5371
5372 error_return:
5373 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5374 free (isymbuf);
5375 if (contents != NULL
5376 && elf_section_data (isec)->this_hdr.contents != contents)
5377 free (contents);
5378 if (internal_relocs != NULL
5379 && elf_section_data (isec)->relocs != internal_relocs)
5380 free (internal_relocs);
5381 return FALSE;
5382 }
5383 \f
5384 /* What to do when ld finds relocations against symbols defined in
5385 discarded sections. */
5386
5387 static unsigned int
5388 ppc_elf_action_discarded (asection *sec)
5389 {
5390 if (strcmp (".fixup", sec->name) == 0)
5391 return 0;
5392
5393 if (strcmp (".got2", sec->name) == 0)
5394 return 0;
5395
5396 return _bfd_elf_default_action_discarded (sec);
5397 }
5398 \f
5399 /* Fill in the address for a pointer generated in a linker section. */
5400
5401 static bfd_vma
5402 elf_finish_pointer_linker_section (bfd *input_bfd,
5403 elf_linker_section_t *lsect,
5404 struct elf_link_hash_entry *h,
5405 bfd_vma relocation,
5406 const Elf_Internal_Rela *rel)
5407 {
5408 elf_linker_section_pointers_t *linker_section_ptr;
5409
5410 BFD_ASSERT (lsect != NULL);
5411
5412 if (h != NULL)
5413 {
5414 /* Handle global symbol. */
5415 struct ppc_elf_link_hash_entry *eh;
5416
5417 eh = (struct ppc_elf_link_hash_entry *) h;
5418 BFD_ASSERT (eh->elf.def_regular);
5419 linker_section_ptr = eh->linker_section_pointer;
5420 }
5421 else
5422 {
5423 /* Handle local symbol. */
5424 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5425
5426 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5427 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5428 }
5429
5430 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5431 rel->r_addend,
5432 lsect);
5433 BFD_ASSERT (linker_section_ptr != NULL);
5434
5435 /* Offset will always be a multiple of four, so use the bottom bit
5436 as a "written" flag. */
5437 if ((linker_section_ptr->offset & 1) == 0)
5438 {
5439 bfd_put_32 (lsect->section->owner,
5440 relocation + linker_section_ptr->addend,
5441 lsect->section->contents + linker_section_ptr->offset);
5442 linker_section_ptr->offset += 1;
5443 }
5444
5445 relocation = (lsect->section->output_offset
5446 + linker_section_ptr->offset - 1
5447 - 0x8000);
5448
5449 #ifdef DEBUG
5450 fprintf (stderr,
5451 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5452 lsect->name, (long) relocation, (long) relocation);
5453 #endif
5454
5455 /* Subtract out the addend, because it will get added back in by the normal
5456 processing. */
5457 return relocation - linker_section_ptr->addend;
5458 }
5459
5460 /* The RELOCATE_SECTION function is called by the ELF backend linker
5461 to handle the relocations for a section.
5462
5463 The relocs are always passed as Rela structures; if the section
5464 actually uses Rel structures, the r_addend field will always be
5465 zero.
5466
5467 This function is responsible for adjust the section contents as
5468 necessary, and (if using Rela relocs and generating a
5469 relocatable output file) adjusting the reloc addend as
5470 necessary.
5471
5472 This function does not have to worry about setting the reloc
5473 address or the reloc symbol index.
5474
5475 LOCAL_SYMS is a pointer to the swapped in local symbols.
5476
5477 LOCAL_SECTIONS is an array giving the section in the input file
5478 corresponding to the st_shndx field of each local symbol.
5479
5480 The global hash table entry for the global symbols can be found
5481 via elf_sym_hashes (input_bfd).
5482
5483 When generating relocatable output, this function must handle
5484 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5485 going to be the section symbol corresponding to the output
5486 section, which means that the addend must be adjusted
5487 accordingly. */
5488
5489 static bfd_boolean
5490 ppc_elf_relocate_section (bfd *output_bfd,
5491 struct bfd_link_info *info,
5492 bfd *input_bfd,
5493 asection *input_section,
5494 bfd_byte *contents,
5495 Elf_Internal_Rela *relocs,
5496 Elf_Internal_Sym *local_syms,
5497 asection **local_sections)
5498 {
5499 Elf_Internal_Shdr *symtab_hdr;
5500 struct elf_link_hash_entry **sym_hashes;
5501 struct ppc_elf_link_hash_table *htab;
5502 Elf_Internal_Rela *rel;
5503 Elf_Internal_Rela *relend;
5504 Elf_Internal_Rela outrel;
5505 bfd_byte *loc;
5506 asection *got2, *sreloc = NULL;
5507 bfd_vma *local_got_offsets;
5508 bfd_boolean ret = TRUE;
5509
5510 #ifdef DEBUG
5511 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5512 "%ld relocations%s",
5513 input_bfd, input_section,
5514 (long) input_section->reloc_count,
5515 (info->relocatable) ? " (relocatable)" : "");
5516 #endif
5517
5518 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5519
5520 if (info->relocatable)
5521 {
5522 if (got2 == NULL)
5523 return TRUE;
5524
5525 rel = relocs;
5526 relend = relocs + input_section->reloc_count;
5527 for (; rel < relend; rel++)
5528 {
5529 enum elf_ppc_reloc_type r_type;
5530
5531 r_type = ELF32_R_TYPE (rel->r_info);
5532 if (r_type == R_PPC_PLTREL24
5533 && rel->r_addend >= 32768)
5534 {
5535 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5536 addend specifies the GOT pointer offset within .got2. */
5537 rel->r_addend += got2->output_offset;
5538 }
5539 }
5540 return TRUE;
5541 }
5542
5543 /* Initialize howto table if not already done. */
5544 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5545 ppc_elf_howto_init ();
5546
5547 htab = ppc_elf_hash_table (info);
5548 local_got_offsets = elf_local_got_offsets (input_bfd);
5549 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5550 sym_hashes = elf_sym_hashes (input_bfd);
5551 rel = relocs;
5552 relend = relocs + input_section->reloc_count;
5553 for (; rel < relend; rel++)
5554 {
5555 enum elf_ppc_reloc_type r_type;
5556 bfd_vma addend;
5557 bfd_reloc_status_type r;
5558 Elf_Internal_Sym *sym;
5559 asection *sec;
5560 struct elf_link_hash_entry *h;
5561 const char *sym_name;
5562 reloc_howto_type *howto;
5563 unsigned long r_symndx;
5564 bfd_vma relocation;
5565 bfd_vma branch_bit, insn, from;
5566 bfd_boolean unresolved_reloc;
5567 bfd_boolean warned;
5568 unsigned int tls_type, tls_mask, tls_gd;
5569
5570 r_type = ELF32_R_TYPE (rel->r_info);
5571 sym = NULL;
5572 sec = NULL;
5573 h = NULL;
5574 unresolved_reloc = FALSE;
5575 warned = FALSE;
5576 r_symndx = ELF32_R_SYM (rel->r_info);
5577
5578 if (r_symndx < symtab_hdr->sh_info)
5579 {
5580 sym = local_syms + r_symndx;
5581 sec = local_sections[r_symndx];
5582 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5583
5584 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5585 }
5586 else
5587 {
5588 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5589 r_symndx, symtab_hdr, sym_hashes,
5590 h, sec, relocation,
5591 unresolved_reloc, warned);
5592
5593 sym_name = h->root.root.string;
5594 }
5595
5596 /* TLS optimizations. Replace instruction sequences and relocs
5597 based on information we collected in tls_optimize. We edit
5598 RELOCS so that --emit-relocs will output something sensible
5599 for the final instruction stream. */
5600 tls_mask = 0;
5601 tls_gd = 0;
5602 if (IS_PPC_TLS_RELOC (r_type))
5603 {
5604 if (h != NULL)
5605 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5606 else if (local_got_offsets != NULL)
5607 {
5608 char *lgot_masks;
5609 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5610 tls_mask = lgot_masks[r_symndx];
5611 }
5612 }
5613
5614 /* Ensure reloc mapping code below stays sane. */
5615 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5616 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5617 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5618 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5619 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5620 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5621 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5622 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5623 abort ();
5624 switch (r_type)
5625 {
5626 default:
5627 break;
5628
5629 case R_PPC_GOT_TPREL16:
5630 case R_PPC_GOT_TPREL16_LO:
5631 if (tls_mask != 0
5632 && (tls_mask & TLS_TPREL) == 0)
5633 {
5634 bfd_vma insn;
5635 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5636 insn &= 31 << 21;
5637 insn |= 0x3c020000; /* addis 0,2,0 */
5638 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5639 r_type = R_PPC_TPREL16_HA;
5640 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5641 }
5642 break;
5643
5644 case R_PPC_TLS:
5645 if (tls_mask != 0
5646 && (tls_mask & TLS_TPREL) == 0)
5647 {
5648 bfd_vma insn, rtra;
5649 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5650 if ((insn & ((31 << 26) | (31 << 11)))
5651 == ((31 << 26) | (2 << 11)))
5652 rtra = insn & ((1 << 26) - (1 << 16));
5653 else if ((insn & ((31 << 26) | (31 << 16)))
5654 == ((31 << 26) | (2 << 16)))
5655 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5656 else
5657 abort ();
5658 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5659 /* add -> addi. */
5660 insn = 14 << 26;
5661 else if ((insn & (31 << 1)) == 23 << 1
5662 && ((insn & (31 << 6)) < 14 << 6
5663 || ((insn & (31 << 6)) >= 16 << 6
5664 && (insn & (31 << 6)) < 24 << 6)))
5665 /* load and store indexed -> dform. */
5666 insn = (32 | ((insn >> 6) & 31)) << 26;
5667 else if ((insn & (31 << 1)) == 21 << 1
5668 && (insn & (0x1a << 6)) == 0)
5669 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5670 insn = (((58 | ((insn >> 6) & 4)) << 26)
5671 | ((insn >> 6) & 1));
5672 else if ((insn & (31 << 1)) == 21 << 1
5673 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5674 /* lwax -> lwa. */
5675 insn = (58 << 26) | 2;
5676 else
5677 abort ();
5678 insn |= rtra;
5679 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5680 r_type = R_PPC_TPREL16_LO;
5681 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5682 /* Was PPC_TLS which sits on insn boundary, now
5683 PPC_TPREL16_LO which is at insn+2. */
5684 rel->r_offset += 2;
5685 }
5686 break;
5687
5688 case R_PPC_GOT_TLSGD16_HI:
5689 case R_PPC_GOT_TLSGD16_HA:
5690 tls_gd = TLS_TPRELGD;
5691 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5692 goto tls_gdld_hi;
5693 break;
5694
5695 case R_PPC_GOT_TLSLD16_HI:
5696 case R_PPC_GOT_TLSLD16_HA:
5697 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5698 {
5699 tls_gdld_hi:
5700 if ((tls_mask & tls_gd) != 0)
5701 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5702 + R_PPC_GOT_TPREL16);
5703 else
5704 {
5705 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5706 rel->r_offset -= 2;
5707 r_type = R_PPC_NONE;
5708 }
5709 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5710 }
5711 break;
5712
5713 case R_PPC_GOT_TLSGD16:
5714 case R_PPC_GOT_TLSGD16_LO:
5715 tls_gd = TLS_TPRELGD;
5716 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5717 goto tls_get_addr_check;
5718 break;
5719
5720 case R_PPC_GOT_TLSLD16:
5721 case R_PPC_GOT_TLSLD16_LO:
5722 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5723 {
5724 tls_get_addr_check:
5725 if (rel + 1 < relend)
5726 {
5727 enum elf_ppc_reloc_type r_type2;
5728 unsigned long r_symndx2;
5729 struct elf_link_hash_entry *h2;
5730 bfd_vma insn1, insn2;
5731 bfd_vma offset;
5732
5733 /* The next instruction should be a call to
5734 __tls_get_addr. Peek at the reloc to be sure. */
5735 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5736 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5737 if (r_symndx2 < symtab_hdr->sh_info
5738 || (r_type2 != R_PPC_REL14
5739 && r_type2 != R_PPC_REL14_BRTAKEN
5740 && r_type2 != R_PPC_REL14_BRNTAKEN
5741 && r_type2 != R_PPC_REL24
5742 && r_type2 != R_PPC_PLTREL24))
5743 break;
5744
5745 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5746 while (h2->root.type == bfd_link_hash_indirect
5747 || h2->root.type == bfd_link_hash_warning)
5748 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5749 if (h2 == NULL || h2 != htab->tls_get_addr)
5750 break;
5751
5752 /* OK, it checks out. Replace the call. */
5753 offset = rel[1].r_offset;
5754 insn1 = bfd_get_32 (output_bfd,
5755 contents + rel->r_offset - 2);
5756 if ((tls_mask & tls_gd) != 0)
5757 {
5758 /* IE */
5759 insn1 &= (1 << 26) - 1;
5760 insn1 |= 32 << 26; /* lwz */
5761 insn2 = 0x7c631214; /* add 3,3,2 */
5762 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5763 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5764 + R_PPC_GOT_TPREL16);
5765 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5766 }
5767 else
5768 {
5769 /* LE */
5770 insn1 = 0x3c620000; /* addis 3,2,0 */
5771 insn2 = 0x38630000; /* addi 3,3,0 */
5772 if (tls_gd == 0)
5773 {
5774 /* Was an LD reloc. */
5775 r_symndx = 0;
5776 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5777 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5778 }
5779 r_type = R_PPC_TPREL16_HA;
5780 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5781 rel[1].r_info = ELF32_R_INFO (r_symndx,
5782 R_PPC_TPREL16_LO);
5783 rel[1].r_offset += 2;
5784 }
5785 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5786 bfd_put_32 (output_bfd, insn2, contents + offset);
5787 if (tls_gd == 0)
5788 {
5789 /* We changed the symbol on an LD reloc. Start over
5790 in order to get h, sym, sec etc. right. */
5791 rel--;
5792 continue;
5793 }
5794 }
5795 }
5796 break;
5797 }
5798
5799 /* Handle other relocations that tweak non-addend part of insn. */
5800 branch_bit = 0;
5801 switch (r_type)
5802 {
5803 default:
5804 break;
5805
5806 /* Branch taken prediction relocations. */
5807 case R_PPC_ADDR14_BRTAKEN:
5808 case R_PPC_REL14_BRTAKEN:
5809 branch_bit = BRANCH_PREDICT_BIT;
5810 /* Fall thru */
5811
5812 /* Branch not taken prediction relocations. */
5813 case R_PPC_ADDR14_BRNTAKEN:
5814 case R_PPC_REL14_BRNTAKEN:
5815 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5816 insn &= ~BRANCH_PREDICT_BIT;
5817 insn |= branch_bit;
5818
5819 from = (rel->r_offset
5820 + input_section->output_offset
5821 + input_section->output_section->vma);
5822
5823 /* Invert 'y' bit if not the default. */
5824 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5825 insn ^= BRANCH_PREDICT_BIT;
5826
5827 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5828 break;
5829 }
5830
5831 addend = rel->r_addend;
5832 tls_type = 0;
5833 howto = NULL;
5834 if (r_type < R_PPC_max)
5835 howto = ppc_elf_howto_table[r_type];
5836 switch (r_type)
5837 {
5838 default:
5839 (*_bfd_error_handler)
5840 (_("%B: unknown relocation type %d for symbol %s"),
5841 input_bfd, (int) r_type, sym_name);
5842
5843 bfd_set_error (bfd_error_bad_value);
5844 ret = FALSE;
5845 continue;
5846
5847 case R_PPC_NONE:
5848 case R_PPC_TLS:
5849 case R_PPC_EMB_MRKREF:
5850 case R_PPC_GNU_VTINHERIT:
5851 case R_PPC_GNU_VTENTRY:
5852 continue;
5853
5854 /* GOT16 relocations. Like an ADDR16 using the symbol's
5855 address in the GOT as relocation value instead of the
5856 symbol's value itself. Also, create a GOT entry for the
5857 symbol and put the symbol value there. */
5858 case R_PPC_GOT_TLSGD16:
5859 case R_PPC_GOT_TLSGD16_LO:
5860 case R_PPC_GOT_TLSGD16_HI:
5861 case R_PPC_GOT_TLSGD16_HA:
5862 tls_type = TLS_TLS | TLS_GD;
5863 goto dogot;
5864
5865 case R_PPC_GOT_TLSLD16:
5866 case R_PPC_GOT_TLSLD16_LO:
5867 case R_PPC_GOT_TLSLD16_HI:
5868 case R_PPC_GOT_TLSLD16_HA:
5869 tls_type = TLS_TLS | TLS_LD;
5870 goto dogot;
5871
5872 case R_PPC_GOT_TPREL16:
5873 case R_PPC_GOT_TPREL16_LO:
5874 case R_PPC_GOT_TPREL16_HI:
5875 case R_PPC_GOT_TPREL16_HA:
5876 tls_type = TLS_TLS | TLS_TPREL;
5877 goto dogot;
5878
5879 case R_PPC_GOT_DTPREL16:
5880 case R_PPC_GOT_DTPREL16_LO:
5881 case R_PPC_GOT_DTPREL16_HI:
5882 case R_PPC_GOT_DTPREL16_HA:
5883 tls_type = TLS_TLS | TLS_DTPREL;
5884 goto dogot;
5885
5886 case R_PPC_GOT16:
5887 case R_PPC_GOT16_LO:
5888 case R_PPC_GOT16_HI:
5889 case R_PPC_GOT16_HA:
5890 dogot:
5891 {
5892 /* Relocation is to the entry for this symbol in the global
5893 offset table. */
5894 bfd_vma off;
5895 bfd_vma *offp;
5896 unsigned long indx;
5897
5898 if (htab->got == NULL)
5899 abort ();
5900
5901 indx = 0;
5902 if (tls_type == (TLS_TLS | TLS_LD)
5903 && (h == NULL
5904 || !h->def_dynamic))
5905 offp = &htab->tlsld_got.offset;
5906 else if (h != NULL)
5907 {
5908 bfd_boolean dyn;
5909 dyn = htab->elf.dynamic_sections_created;
5910 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5911 || (info->shared
5912 && SYMBOL_REFERENCES_LOCAL (info, h)))
5913 /* This is actually a static link, or it is a
5914 -Bsymbolic link and the symbol is defined
5915 locally, or the symbol was forced to be local
5916 because of a version file. */
5917 ;
5918 else
5919 {
5920 indx = h->dynindx;
5921 unresolved_reloc = FALSE;
5922 }
5923 offp = &h->got.offset;
5924 }
5925 else
5926 {
5927 if (local_got_offsets == NULL)
5928 abort ();
5929 offp = &local_got_offsets[r_symndx];
5930 }
5931
5932 /* The offset must always be a multiple of 4. We use the
5933 least significant bit to record whether we have already
5934 processed this entry. */
5935 off = *offp;
5936 if ((off & 1) != 0)
5937 off &= ~1;
5938 else
5939 {
5940 unsigned int tls_m = (tls_mask
5941 & (TLS_LD | TLS_GD | TLS_DTPREL
5942 | TLS_TPREL | TLS_TPRELGD));
5943
5944 if (offp == &htab->tlsld_got.offset)
5945 tls_m = TLS_LD;
5946 else if (h == NULL
5947 || !h->def_dynamic)
5948 tls_m &= ~TLS_LD;
5949
5950 /* We might have multiple got entries for this sym.
5951 Initialize them all. */
5952 do
5953 {
5954 int tls_ty = 0;
5955
5956 if ((tls_m & TLS_LD) != 0)
5957 {
5958 tls_ty = TLS_TLS | TLS_LD;
5959 tls_m &= ~TLS_LD;
5960 }
5961 else if ((tls_m & TLS_GD) != 0)
5962 {
5963 tls_ty = TLS_TLS | TLS_GD;
5964 tls_m &= ~TLS_GD;
5965 }
5966 else if ((tls_m & TLS_DTPREL) != 0)
5967 {
5968 tls_ty = TLS_TLS | TLS_DTPREL;
5969 tls_m &= ~TLS_DTPREL;
5970 }
5971 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5972 {
5973 tls_ty = TLS_TLS | TLS_TPREL;
5974 tls_m = 0;
5975 }
5976
5977 /* Generate relocs for the dynamic linker. */
5978 if ((info->shared || indx != 0)
5979 && (h == NULL
5980 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5981 || h->root.type != bfd_link_hash_undefweak))
5982 {
5983 outrel.r_offset = (htab->got->output_section->vma
5984 + htab->got->output_offset
5985 + off);
5986 outrel.r_addend = 0;
5987 if (tls_ty & (TLS_LD | TLS_GD))
5988 {
5989 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5990 if (tls_ty == (TLS_TLS | TLS_GD))
5991 {
5992 loc = htab->relgot->contents;
5993 loc += (htab->relgot->reloc_count++
5994 * sizeof (Elf32_External_Rela));
5995 bfd_elf32_swap_reloca_out (output_bfd,
5996 &outrel, loc);
5997 outrel.r_offset += 4;
5998 outrel.r_info
5999 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6000 }
6001 }
6002 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6003 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6004 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6005 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6006 else if (indx == 0)
6007 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6008 else
6009 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6010 if (indx == 0)
6011 {
6012 outrel.r_addend += relocation;
6013 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6014 outrel.r_addend -= htab->elf.tls_sec->vma;
6015 }
6016 loc = htab->relgot->contents;
6017 loc += (htab->relgot->reloc_count++
6018 * sizeof (Elf32_External_Rela));
6019 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6020 }
6021
6022 /* Init the .got section contents if we're not
6023 emitting a reloc. */
6024 else
6025 {
6026 bfd_vma value = relocation;
6027
6028 if (tls_ty == (TLS_TLS | TLS_LD))
6029 value = 1;
6030 else if (tls_ty != 0)
6031 {
6032 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6033 if (tls_ty == (TLS_TLS | TLS_TPREL))
6034 value += DTP_OFFSET - TP_OFFSET;
6035
6036 if (tls_ty == (TLS_TLS | TLS_GD))
6037 {
6038 bfd_put_32 (output_bfd, value,
6039 htab->got->contents + off + 4);
6040 value = 1;
6041 }
6042 }
6043 bfd_put_32 (output_bfd, value,
6044 htab->got->contents + off);
6045 }
6046
6047 off += 4;
6048 if (tls_ty & (TLS_LD | TLS_GD))
6049 off += 4;
6050 }
6051 while (tls_m != 0);
6052
6053 off = *offp;
6054 *offp = off | 1;
6055 }
6056
6057 if (off >= (bfd_vma) -2)
6058 abort ();
6059
6060 if ((tls_type & TLS_TLS) != 0)
6061 {
6062 if (tls_type != (TLS_TLS | TLS_LD))
6063 {
6064 if ((tls_mask & TLS_LD) != 0
6065 && !(h == NULL
6066 || !h->def_dynamic))
6067 off += 8;
6068 if (tls_type != (TLS_TLS | TLS_GD))
6069 {
6070 if ((tls_mask & TLS_GD) != 0)
6071 off += 8;
6072 if (tls_type != (TLS_TLS | TLS_DTPREL))
6073 {
6074 if ((tls_mask & TLS_DTPREL) != 0)
6075 off += 4;
6076 }
6077 }
6078 }
6079 }
6080
6081 relocation = htab->got->output_offset + off;
6082 relocation -= htab->elf.hgot->root.u.def.value;
6083
6084 /* Addends on got relocations don't make much sense.
6085 x+off@got is actually x@got+off, and since the got is
6086 generated by a hash table traversal, the value in the
6087 got at entry m+n bears little relation to the entry m. */
6088 if (addend != 0)
6089 (*_bfd_error_handler)
6090 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6091 input_bfd,
6092 input_section,
6093 (long) rel->r_offset,
6094 howto->name,
6095 sym_name);
6096 }
6097 break;
6098
6099 /* Relocations that need no special processing. */
6100 case R_PPC_LOCAL24PC:
6101 /* It makes no sense to point a local relocation
6102 at a symbol not in this object. */
6103 if (unresolved_reloc)
6104 {
6105 if (! (*info->callbacks->undefined_symbol) (info,
6106 h->root.root.string,
6107 input_bfd,
6108 input_section,
6109 rel->r_offset,
6110 TRUE))
6111 return FALSE;
6112 continue;
6113 }
6114 break;
6115
6116 case R_PPC_DTPREL16:
6117 case R_PPC_DTPREL16_LO:
6118 case R_PPC_DTPREL16_HI:
6119 case R_PPC_DTPREL16_HA:
6120 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6121 break;
6122
6123 /* Relocations that may need to be propagated if this is a shared
6124 object. */
6125 case R_PPC_TPREL16:
6126 case R_PPC_TPREL16_LO:
6127 case R_PPC_TPREL16_HI:
6128 case R_PPC_TPREL16_HA:
6129 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6130 /* The TPREL16 relocs shouldn't really be used in shared
6131 libs as they will result in DT_TEXTREL being set, but
6132 support them anyway. */
6133 goto dodyn;
6134
6135 case R_PPC_TPREL32:
6136 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6137 goto dodyn;
6138
6139 case R_PPC_DTPREL32:
6140 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6141 goto dodyn;
6142
6143 case R_PPC_DTPMOD32:
6144 relocation = 1;
6145 addend = 0;
6146 goto dodyn;
6147
6148 case R_PPC_REL16:
6149 case R_PPC_REL16_LO:
6150 case R_PPC_REL16_HI:
6151 case R_PPC_REL16_HA:
6152 break;
6153
6154 case R_PPC_REL24:
6155 case R_PPC_REL32:
6156 case R_PPC_REL14:
6157 case R_PPC_REL14_BRTAKEN:
6158 case R_PPC_REL14_BRNTAKEN:
6159 /* If these relocations are not to a named symbol, they can be
6160 handled right here, no need to bother the dynamic linker. */
6161 if (SYMBOL_REFERENCES_LOCAL (info, h)
6162 || h == htab->elf.hgot)
6163 break;
6164 /* fall through */
6165
6166 /* Relocations that always need to be propagated if this is a shared
6167 object. */
6168 case R_PPC_ADDR32:
6169 case R_PPC_ADDR24:
6170 case R_PPC_ADDR16:
6171 case R_PPC_ADDR16_LO:
6172 case R_PPC_ADDR16_HI:
6173 case R_PPC_ADDR16_HA:
6174 case R_PPC_ADDR14:
6175 case R_PPC_ADDR14_BRTAKEN:
6176 case R_PPC_ADDR14_BRNTAKEN:
6177 case R_PPC_UADDR32:
6178 case R_PPC_UADDR16:
6179 /* r_symndx will be zero only for relocs against symbols
6180 from removed linkonce sections, or sections discarded by
6181 a linker script. */
6182 dodyn:
6183 if (r_symndx == 0)
6184 break;
6185 /* Fall thru. */
6186
6187 if ((input_section->flags & SEC_ALLOC) == 0)
6188 break;
6189 /* Fall thru. */
6190
6191 if ((info->shared
6192 && (h == NULL
6193 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6194 || h->root.type != bfd_link_hash_undefweak)
6195 && (MUST_BE_DYN_RELOC (r_type)
6196 || !SYMBOL_CALLS_LOCAL (info, h)))
6197 || (ELIMINATE_COPY_RELOCS
6198 && !info->shared
6199 && h != NULL
6200 && h->dynindx != -1
6201 && !h->non_got_ref
6202 && h->def_dynamic
6203 && !h->def_regular))
6204 {
6205 int skip;
6206
6207 #ifdef DEBUG
6208 fprintf (stderr, "ppc_elf_relocate_section needs to "
6209 "create relocation for %s\n",
6210 (h && h->root.root.string
6211 ? h->root.root.string : "<unknown>"));
6212 #endif
6213
6214 /* When generating a shared object, these relocations
6215 are copied into the output file to be resolved at run
6216 time. */
6217 if (sreloc == NULL)
6218 {
6219 const char *name;
6220
6221 name = (bfd_elf_string_from_elf_section
6222 (input_bfd,
6223 elf_elfheader (input_bfd)->e_shstrndx,
6224 elf_section_data (input_section)->rel_hdr.sh_name));
6225 if (name == NULL)
6226 return FALSE;
6227
6228 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6229 && strcmp (bfd_get_section_name (input_bfd,
6230 input_section),
6231 name + 5) == 0);
6232
6233 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6234 BFD_ASSERT (sreloc != NULL);
6235 }
6236
6237 skip = 0;
6238
6239 outrel.r_offset =
6240 _bfd_elf_section_offset (output_bfd, info, input_section,
6241 rel->r_offset);
6242 if (outrel.r_offset == (bfd_vma) -1
6243 || outrel.r_offset == (bfd_vma) -2)
6244 skip = (int) outrel.r_offset;
6245 outrel.r_offset += (input_section->output_section->vma
6246 + input_section->output_offset);
6247
6248 if (skip)
6249 memset (&outrel, 0, sizeof outrel);
6250 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6251 {
6252 unresolved_reloc = FALSE;
6253 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6254 outrel.r_addend = rel->r_addend;
6255 }
6256 else
6257 {
6258 outrel.r_addend = relocation + rel->r_addend;
6259
6260 if (r_type == R_PPC_ADDR32)
6261 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6262 else
6263 {
6264 long indx;
6265
6266 if (bfd_is_abs_section (sec))
6267 indx = 0;
6268 else if (sec == NULL || sec->owner == NULL)
6269 {
6270 bfd_set_error (bfd_error_bad_value);
6271 return FALSE;
6272 }
6273 else
6274 {
6275 asection *osec;
6276
6277 /* We are turning this relocation into one
6278 against a section symbol. It would be
6279 proper to subtract the symbol's value,
6280 osec->vma, from the emitted reloc addend,
6281 but ld.so expects buggy relocs. */
6282 osec = sec->output_section;
6283 indx = elf_section_data (osec)->dynindx;
6284 BFD_ASSERT (indx > 0);
6285 #ifdef DEBUG
6286 if (indx <= 0)
6287 printf ("indx=%d section=%s flags=%08x name=%s\n",
6288 indx, osec->name, osec->flags,
6289 h->root.root.string);
6290 #endif
6291 }
6292
6293 outrel.r_info = ELF32_R_INFO (indx, r_type);
6294 }
6295 }
6296
6297 loc = sreloc->contents;
6298 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6299 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6300
6301 if (skip == -1)
6302 continue;
6303
6304 /* This reloc will be computed at runtime. We clear the memory
6305 so that it contains predictable value. */
6306 if (! skip
6307 && ((input_section->flags & SEC_ALLOC) != 0
6308 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6309 {
6310 relocation = howto->pc_relative ? outrel.r_offset : 0;
6311 addend = 0;
6312 break;
6313 }
6314 }
6315 break;
6316
6317 case R_PPC_RELAX32PC_PLT:
6318 case R_PPC_RELAX32_PLT:
6319 {
6320 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6321
6322 if (htab->plt_type == PLT_NEW)
6323 relocation = (htab->glink->output_section->vma
6324 + htab->glink->output_offset
6325 + ent->glink_offset);
6326 else
6327 relocation = (htab->plt->output_section->vma
6328 + htab->plt->output_offset
6329 + ent->plt.offset);
6330 addend = 0;
6331 }
6332 if (r_type == R_PPC_RELAX32_PLT)
6333 goto relax32;
6334 /* Fall thru */
6335
6336 case R_PPC_RELAX32PC:
6337 relocation -= (input_section->output_section->vma
6338 + input_section->output_offset
6339 + rel->r_offset - 4);
6340 /* Fall thru */
6341
6342 case R_PPC_RELAX32:
6343 relax32:
6344 {
6345 unsigned long t0;
6346 unsigned long t1;
6347
6348 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6349 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6350
6351 /* We're clearing the bits for R_PPC_ADDR16_HA
6352 and R_PPC_ADDR16_LO here. */
6353 t0 &= ~0xffff;
6354 t1 &= ~0xffff;
6355
6356 /* t0 is HA, t1 is LO */
6357 relocation += addend;
6358 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6359 t1 |= relocation & 0xffff;
6360
6361 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6362 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6363 }
6364 continue;
6365
6366 /* Indirect .sdata relocation. */
6367 case R_PPC_EMB_SDAI16:
6368 BFD_ASSERT (htab->sdata[0].section != NULL);
6369 relocation
6370 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6371 h, relocation, rel);
6372 break;
6373
6374 /* Indirect .sdata2 relocation. */
6375 case R_PPC_EMB_SDA2I16:
6376 BFD_ASSERT (htab->sdata[1].section != NULL);
6377 relocation
6378 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6379 h, relocation, rel);
6380 break;
6381
6382 /* Handle the TOC16 reloc. We want to use the offset within the .got
6383 section, not the actual VMA. This is appropriate when generating
6384 an embedded ELF object, for which the .got section acts like the
6385 AIX .toc section. */
6386 case R_PPC_TOC16: /* phony GOT16 relocations */
6387 BFD_ASSERT (sec != NULL);
6388 BFD_ASSERT (bfd_is_und_section (sec)
6389 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6390 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6391
6392 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6393 break;
6394
6395 case R_PPC_PLTREL24:
6396 /* Relocation is to the entry for this symbol in the
6397 procedure linkage table. */
6398 {
6399 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6400
6401 addend = 0;
6402 if (ent == NULL
6403 || htab->plt == NULL)
6404 {
6405 /* We didn't make a PLT entry for this symbol. This
6406 happens when statically linking PIC code, or when
6407 using -Bsymbolic. */
6408 break;
6409 }
6410
6411 unresolved_reloc = FALSE;
6412 if (htab->plt_type == PLT_NEW)
6413 relocation = (htab->glink->output_section->vma
6414 + htab->glink->output_offset
6415 + ent->glink_offset);
6416 else
6417 relocation = (htab->plt->output_section->vma
6418 + htab->plt->output_offset
6419 + ent->plt.offset);
6420 }
6421 break;
6422
6423 /* Relocate against _SDA_BASE_. */
6424 case R_PPC_SDAREL16:
6425 {
6426 const char *name;
6427 struct elf_link_hash_entry *sh;
6428
6429 BFD_ASSERT (sec != NULL);
6430 name = bfd_get_section_name (abfd, sec->output_section);
6431 if (! ((strncmp (name, ".sdata", 6) == 0
6432 && (name[6] == 0 || name[6] == '.'))
6433 || (strncmp (name, ".sbss", 5) == 0
6434 && (name[5] == 0 || name[5] == '.'))))
6435 {
6436 (*_bfd_error_handler)
6437 (_("%B: the target (%s) of a %s relocation is "
6438 "in the wrong output section (%s)"),
6439 input_bfd,
6440 sym_name,
6441 howto->name,
6442 name);
6443 }
6444 sh = htab->sdata[0].sym;
6445 addend -= (sh->root.u.def.value
6446 + sh->root.u.def.section->output_offset
6447 + sh->root.u.def.section->output_section->vma);
6448 }
6449 break;
6450
6451 /* Relocate against _SDA2_BASE_. */
6452 case R_PPC_EMB_SDA2REL:
6453 {
6454 const char *name;
6455 struct elf_link_hash_entry *sh;
6456
6457 BFD_ASSERT (sec != NULL);
6458 name = bfd_get_section_name (abfd, sec->output_section);
6459 if (! (strncmp (name, ".sdata2", 7) == 0
6460 || strncmp (name, ".sbss2", 6) == 0))
6461 {
6462 (*_bfd_error_handler)
6463 (_("%B: the target (%s) of a %s relocation is "
6464 "in the wrong output section (%s)"),
6465 input_bfd,
6466 sym_name,
6467 howto->name,
6468 name);
6469
6470 bfd_set_error (bfd_error_bad_value);
6471 ret = FALSE;
6472 continue;
6473 }
6474 sh = htab->sdata[1].sym;
6475 addend -= (sh->root.u.def.value
6476 + sh->root.u.def.section->output_offset
6477 + sh->root.u.def.section->output_section->vma);
6478 }
6479 break;
6480
6481 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6482 case R_PPC_EMB_SDA21:
6483 case R_PPC_EMB_RELSDA:
6484 {
6485 const char *name;
6486 int reg;
6487 struct elf_link_hash_entry *sh;
6488
6489 BFD_ASSERT (sec != NULL);
6490 name = bfd_get_section_name (abfd, sec->output_section);
6491 if (((strncmp (name, ".sdata", 6) == 0
6492 && (name[6] == 0 || name[6] == '.'))
6493 || (strncmp (name, ".sbss", 5) == 0
6494 && (name[5] == 0 || name[5] == '.'))))
6495 {
6496 reg = 13;
6497 sh = htab->sdata[0].sym;
6498 addend -= (sh->root.u.def.value
6499 + sh->root.u.def.section->output_offset
6500 + sh->root.u.def.section->output_section->vma);
6501 }
6502
6503 else if (strncmp (name, ".sdata2", 7) == 0
6504 || strncmp (name, ".sbss2", 6) == 0)
6505 {
6506 reg = 2;
6507 sh = htab->sdata[1].sym;
6508 addend -= (sh->root.u.def.value
6509 + sh->root.u.def.section->output_offset
6510 + sh->root.u.def.section->output_section->vma);
6511 }
6512
6513 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6514 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6515 {
6516 reg = 0;
6517 }
6518
6519 else
6520 {
6521 (*_bfd_error_handler)
6522 (_("%B: the target (%s) of a %s relocation is "
6523 "in the wrong output section (%s)"),
6524 input_bfd,
6525 sym_name,
6526 howto->name,
6527 name);
6528
6529 bfd_set_error (bfd_error_bad_value);
6530 ret = FALSE;
6531 continue;
6532 }
6533
6534 if (r_type == R_PPC_EMB_SDA21)
6535 { /* fill in register field */
6536 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6537 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6538 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6539 }
6540 }
6541 break;
6542
6543 /* Relocate against the beginning of the section. */
6544 case R_PPC_SECTOFF:
6545 case R_PPC_SECTOFF_LO:
6546 case R_PPC_SECTOFF_HI:
6547 case R_PPC_SECTOFF_HA:
6548 BFD_ASSERT (sec != NULL);
6549 addend -= sec->output_section->vma;
6550 break;
6551
6552 /* Negative relocations. */
6553 case R_PPC_EMB_NADDR32:
6554 case R_PPC_EMB_NADDR16:
6555 case R_PPC_EMB_NADDR16_LO:
6556 case R_PPC_EMB_NADDR16_HI:
6557 case R_PPC_EMB_NADDR16_HA:
6558 addend -= 2 * relocation;
6559 break;
6560
6561 case R_PPC_COPY:
6562 case R_PPC_GLOB_DAT:
6563 case R_PPC_JMP_SLOT:
6564 case R_PPC_RELATIVE:
6565 case R_PPC_PLT32:
6566 case R_PPC_PLTREL32:
6567 case R_PPC_PLT16_LO:
6568 case R_PPC_PLT16_HI:
6569 case R_PPC_PLT16_HA:
6570 case R_PPC_ADDR30:
6571 case R_PPC_EMB_RELSEC16:
6572 case R_PPC_EMB_RELST_LO:
6573 case R_PPC_EMB_RELST_HI:
6574 case R_PPC_EMB_RELST_HA:
6575 case R_PPC_EMB_BIT_FLD:
6576 (*_bfd_error_handler)
6577 (_("%B: relocation %s is not yet supported for symbol %s."),
6578 input_bfd,
6579 howto->name,
6580 sym_name);
6581
6582 bfd_set_error (bfd_error_invalid_operation);
6583 ret = FALSE;
6584 continue;
6585 }
6586
6587 /* Do any further special processing. */
6588 switch (r_type)
6589 {
6590 default:
6591 break;
6592
6593 case R_PPC_ADDR16_HA:
6594 case R_PPC_REL16_HA:
6595 case R_PPC_GOT16_HA:
6596 case R_PPC_PLT16_HA:
6597 case R_PPC_SECTOFF_HA:
6598 case R_PPC_TPREL16_HA:
6599 case R_PPC_DTPREL16_HA:
6600 case R_PPC_GOT_TLSGD16_HA:
6601 case R_PPC_GOT_TLSLD16_HA:
6602 case R_PPC_GOT_TPREL16_HA:
6603 case R_PPC_GOT_DTPREL16_HA:
6604 case R_PPC_EMB_NADDR16_HA:
6605 case R_PPC_EMB_RELST_HA:
6606 /* It's just possible that this symbol is a weak symbol
6607 that's not actually defined anywhere. In that case,
6608 'sec' would be NULL, and we should leave the symbol
6609 alone (it will be set to zero elsewhere in the link). */
6610 if (sec != NULL)
6611 /* Add 0x10000 if sign bit in 0:15 is set.
6612 Bits 0:15 are not used. */
6613 addend += 0x8000;
6614 break;
6615 }
6616
6617 #ifdef DEBUG
6618 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6619 "offset = %ld, addend = %ld\n",
6620 howto->name,
6621 (int) r_type,
6622 sym_name,
6623 r_symndx,
6624 (long) rel->r_offset,
6625 (long) addend);
6626 #endif
6627
6628 if (unresolved_reloc
6629 && !((input_section->flags & SEC_DEBUGGING) != 0
6630 && h->def_dynamic))
6631 {
6632 (*_bfd_error_handler)
6633 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6634 input_bfd,
6635 input_section,
6636 (long) rel->r_offset,
6637 howto->name,
6638 sym_name);
6639 ret = FALSE;
6640 }
6641
6642 r = _bfd_final_link_relocate (howto,
6643 input_bfd,
6644 input_section,
6645 contents,
6646 rel->r_offset,
6647 relocation,
6648 addend);
6649
6650 if (r != bfd_reloc_ok)
6651 {
6652 if (r == bfd_reloc_overflow)
6653 {
6654 if (warned)
6655 continue;
6656 if (h != NULL
6657 && h->root.type == bfd_link_hash_undefweak
6658 && howto->pc_relative)
6659 {
6660 /* Assume this is a call protected by other code that
6661 detect the symbol is undefined. If this is the case,
6662 we can safely ignore the overflow. If not, the
6663 program is hosed anyway, and a little warning isn't
6664 going to help. */
6665
6666 continue;
6667 }
6668
6669 if (! (*info->callbacks->reloc_overflow) (info,
6670 (h ? &h->root : NULL),
6671 sym_name,
6672 howto->name,
6673 rel->r_addend,
6674 input_bfd,
6675 input_section,
6676 rel->r_offset))
6677 return FALSE;
6678 }
6679 else
6680 {
6681 (*_bfd_error_handler)
6682 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6683 input_bfd, input_section,
6684 (long) rel->r_offset, howto->name, sym_name, (int) r);
6685 ret = FALSE;
6686 }
6687 }
6688 }
6689
6690 #ifdef DEBUG
6691 fprintf (stderr, "\n");
6692 #endif
6693
6694 return ret;
6695 }
6696 \f
6697 #define PPC_LO(v) ((v) & 0xffff)
6698 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6699 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6700
6701 /* Finish up dynamic symbol handling. We set the contents of various
6702 dynamic sections here. */
6703
6704 static bfd_boolean
6705 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6706 struct bfd_link_info *info,
6707 struct elf_link_hash_entry *h,
6708 Elf_Internal_Sym *sym)
6709 {
6710 struct ppc_elf_link_hash_table *htab;
6711 struct plt_entry *ent;
6712 bfd_boolean doneone;
6713
6714 #ifdef DEBUG
6715 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6716 h->root.root.string);
6717 #endif
6718
6719 htab = ppc_elf_hash_table (info);
6720 BFD_ASSERT (htab->elf.dynobj != NULL);
6721
6722 doneone = FALSE;
6723 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6724 if (ent->plt.offset != (bfd_vma) -1)
6725 {
6726 if (!doneone)
6727 {
6728 Elf_Internal_Rela rela;
6729 bfd_byte *loc;
6730 bfd_vma reloc_index;
6731
6732 if (htab->plt_type == PLT_NEW)
6733 reloc_index = ent->plt.offset / 4;
6734 else
6735 {
6736 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6737 / htab->plt_slot_size);
6738 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6739 && htab->plt_type == PLT_OLD)
6740 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6741 }
6742
6743 /* This symbol has an entry in the procedure linkage table.
6744 Set it up. */
6745 if (htab->plt_type == PLT_VXWORKS)
6746 {
6747 bfd_vma got_offset;
6748 const bfd_vma *plt_entry;
6749
6750 /* The first three entries in .got.plt are reserved. */
6751 got_offset = (reloc_index + 3) * 4;
6752
6753 /* Use the right PLT. */
6754 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6755 : ppc_elf_vxworks_plt_entry;
6756
6757 /* Fill in the .plt on VxWorks. */
6758 if (info->shared)
6759 {
6760 bfd_vma got_offset_hi = (got_offset >> 16)
6761 + ((got_offset & 0x8000) >> 15);
6762
6763 bfd_put_32 (output_bfd,
6764 plt_entry[0] | (got_offset_hi & 0xffff),
6765 htab->plt->contents + ent->plt.offset + 0);
6766 bfd_put_32 (output_bfd,
6767 plt_entry[1] | (got_offset & 0xffff),
6768 htab->plt->contents + ent->plt.offset + 4);
6769 }
6770 else
6771 {
6772 bfd_vma got_loc
6773 = (got_offset
6774 + htab->elf.hgot->root.u.def.value
6775 + htab->elf.hgot->root.u.def.section->output_offset
6776 + htab->elf.hgot->root.u.def.section->output_section->vma);
6777 bfd_vma got_loc_hi = (got_loc >> 16)
6778 + ((got_loc & 0x8000) >> 15);
6779
6780 bfd_put_32 (output_bfd,
6781 plt_entry[0] | (got_loc_hi & 0xffff),
6782 htab->plt->contents + ent->plt.offset + 0);
6783 bfd_put_32 (output_bfd,
6784 plt_entry[1] | (got_loc & 0xffff),
6785 htab->plt->contents + ent->plt.offset + 4);
6786 }
6787
6788 bfd_put_32 (output_bfd, plt_entry[2],
6789 htab->plt->contents + ent->plt.offset + 8);
6790 bfd_put_32 (output_bfd, plt_entry[3],
6791 htab->plt->contents + ent->plt.offset + 12);
6792
6793 /* This instruction is an immediate load. The value loaded is
6794 the byte offset of the R_PPC_JMP_SLOT relocation from the
6795 start of the .rela.plt section. The value is stored in the
6796 low-order 16 bits of the load instruction. */
6797 /* NOTE: It appears that this is now an index rather than a
6798 prescaled offset. */
6799 bfd_put_32 (output_bfd,
6800 plt_entry[4] | reloc_index,
6801 htab->plt->contents + ent->plt.offset + 16);
6802 /* This instruction is a PC-relative branch whose target is
6803 the start of the PLT section. The address of this branch
6804 instruction is 20 bytes beyond the start of this PLT entry.
6805 The address is encoded in bits 6-29, inclusive. The value
6806 stored is right-shifted by two bits, permitting a 26-bit
6807 offset. */
6808 bfd_put_32 (output_bfd,
6809 (plt_entry[5]
6810 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6811 htab->plt->contents + ent->plt.offset + 20);
6812 bfd_put_32 (output_bfd, plt_entry[6],
6813 htab->plt->contents + ent->plt.offset + 24);
6814 bfd_put_32 (output_bfd, plt_entry[7],
6815 htab->plt->contents + ent->plt.offset + 28);
6816
6817 /* Fill in the GOT entry corresponding to this PLT slot with
6818 the address immediately after the the "bctr" instruction
6819 in this PLT entry. */
6820 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6821 + htab->plt->output_offset
6822 + ent->plt.offset + 16),
6823 htab->sgotplt->contents + got_offset);
6824
6825 if (!info->shared)
6826 {
6827 /* Fill in a couple of entries in .rela.plt.unloaded. */
6828 loc = htab->srelplt2->contents
6829 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6830 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6831 * sizeof (Elf32_External_Rela));
6832
6833 /* Provide the @ha relocation for the first instruction. */
6834 rela.r_offset = (htab->plt->output_section->vma
6835 + htab->plt->output_offset
6836 + ent->plt.offset + 2);
6837 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6838 R_PPC_ADDR16_HA);
6839 rela.r_addend = got_offset;
6840 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6841 loc += sizeof (Elf32_External_Rela);
6842
6843 /* Provide the @l relocation for the second instruction. */
6844 rela.r_offset = (htab->plt->output_section->vma
6845 + htab->plt->output_offset
6846 + ent->plt.offset + 6);
6847 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6848 R_PPC_ADDR16_LO);
6849 rela.r_addend = got_offset;
6850 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6851 loc += sizeof (Elf32_External_Rela);
6852
6853 /* Provide a relocation for the GOT entry corresponding to this
6854 PLT slot. Point it at the middle of the .plt entry. */
6855 rela.r_offset = (htab->sgotplt->output_section->vma
6856 + htab->sgotplt->output_offset
6857 + got_offset);
6858 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6859 R_PPC_ADDR32);
6860 rela.r_addend = ent->plt.offset + 16;
6861 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6862 }
6863
6864 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6865 In particular, the offset for the relocation is not the
6866 address of the PLT entry for this function, as specified
6867 by the ABI. Instead, the offset is set to the address of
6868 the GOT slot for this function. See EABI 4.4.4.1. */
6869 rela.r_offset = (htab->sgotplt->output_section->vma
6870 + htab->sgotplt->output_offset
6871 + got_offset);
6872
6873 }
6874 else
6875 {
6876 rela.r_offset = (htab->plt->output_section->vma
6877 + htab->plt->output_offset
6878 + ent->plt.offset);
6879 if (htab->plt_type == PLT_OLD)
6880 {
6881 /* We don't need to fill in the .plt. The ppc dynamic
6882 linker will fill it in. */
6883 }
6884 else
6885 {
6886 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6887 + htab->glink->output_section->vma
6888 + htab->glink->output_offset);
6889 bfd_put_32 (output_bfd, val,
6890 htab->plt->contents + ent->plt.offset);
6891 }
6892 }
6893
6894 /* Fill in the entry in the .rela.plt section. */
6895 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6896 rela.r_addend = 0;
6897
6898 loc = (htab->relplt->contents
6899 + reloc_index * sizeof (Elf32_External_Rela));
6900 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6901
6902 if (!h->def_regular)
6903 {
6904 /* Mark the symbol as undefined, rather than as defined in
6905 the .plt section. Leave the value alone. */
6906 sym->st_shndx = SHN_UNDEF;
6907 /* If the symbol is weak, we do need to clear the value.
6908 Otherwise, the PLT entry would provide a definition for
6909 the symbol even if the symbol wasn't defined anywhere,
6910 and so the symbol would never be NULL. */
6911 if (!h->ref_regular_nonweak)
6912 sym->st_value = 0;
6913 }
6914 doneone = TRUE;
6915 }
6916
6917 if (htab->plt_type == PLT_NEW)
6918 {
6919 bfd_vma plt;
6920 unsigned char *p;
6921
6922 plt = (ent->plt.offset
6923 + htab->plt->output_section->vma
6924 + htab->plt->output_offset);
6925 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6926
6927 if (info->shared || info->pie)
6928 {
6929 bfd_vma got = 0;
6930
6931 if (ent->addend >= 32768)
6932 got = (ent->addend
6933 + ent->sec->output_section->vma
6934 + ent->sec->output_offset);
6935 else if (htab->elf.hgot != NULL)
6936 got = (htab->elf.hgot->root.u.def.value
6937 + htab->elf.hgot->root.u.def.section->output_section->vma
6938 + htab->elf.hgot->root.u.def.section->output_offset);
6939
6940 plt -= got;
6941
6942 if (plt + 0x8000 < 0x10000)
6943 {
6944 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6945 p += 4;
6946 bfd_put_32 (output_bfd, MTCTR_11, p);
6947 p += 4;
6948 bfd_put_32 (output_bfd, BCTR, p);
6949 p += 4;
6950 bfd_put_32 (output_bfd, NOP, p);
6951 p += 4;
6952 }
6953 else
6954 {
6955 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6956 p += 4;
6957 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6958 p += 4;
6959 bfd_put_32 (output_bfd, MTCTR_11, p);
6960 p += 4;
6961 bfd_put_32 (output_bfd, BCTR, p);
6962 p += 4;
6963 }
6964 }
6965 else
6966 {
6967 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6968 p += 4;
6969 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6970 p += 4;
6971 bfd_put_32 (output_bfd, MTCTR_11, p);
6972 p += 4;
6973 bfd_put_32 (output_bfd, BCTR, p);
6974 p += 4;
6975
6976 /* We only need one non-PIC glink stub. */
6977 break;
6978 }
6979 }
6980 else
6981 break;
6982 }
6983
6984 if (h->needs_copy)
6985 {
6986 asection *s;
6987 Elf_Internal_Rela rela;
6988 bfd_byte *loc;
6989
6990 /* This symbols needs a copy reloc. Set it up. */
6991
6992 #ifdef DEBUG
6993 fprintf (stderr, ", copy");
6994 #endif
6995
6996 BFD_ASSERT (h->dynindx != -1);
6997
6998 if (ppc_elf_hash_entry (h)->has_sda_refs)
6999 s = htab->relsbss;
7000 else
7001 s = htab->relbss;
7002 BFD_ASSERT (s != NULL);
7003
7004 rela.r_offset = (h->root.u.def.value
7005 + h->root.u.def.section->output_section->vma
7006 + h->root.u.def.section->output_offset);
7007 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7008 rela.r_addend = 0;
7009 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7010 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7011 }
7012
7013 #ifdef DEBUG
7014 fprintf (stderr, "\n");
7015 #endif
7016
7017 /* Mark some specially defined symbols as absolute. */
7018 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7019 || (!htab->is_vxworks
7020 && (h == htab->elf.hgot
7021 || strcmp (h->root.root.string,
7022 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7023 sym->st_shndx = SHN_ABS;
7024
7025 return TRUE;
7026 }
7027 \f
7028 static enum elf_reloc_type_class
7029 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7030 {
7031 switch (ELF32_R_TYPE (rela->r_info))
7032 {
7033 case R_PPC_RELATIVE:
7034 return reloc_class_relative;
7035 case R_PPC_REL24:
7036 case R_PPC_ADDR24:
7037 case R_PPC_JMP_SLOT:
7038 return reloc_class_plt;
7039 case R_PPC_COPY:
7040 return reloc_class_copy;
7041 default:
7042 return reloc_class_normal;
7043 }
7044 }
7045 \f
7046 /* Finish up the dynamic sections. */
7047
7048 static bfd_boolean
7049 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7050 struct bfd_link_info *info)
7051 {
7052 asection *sdyn;
7053 asection *splt;
7054 struct ppc_elf_link_hash_table *htab;
7055 bfd_vma got;
7056 bfd * dynobj;
7057
7058 #ifdef DEBUG
7059 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7060 #endif
7061
7062 htab = ppc_elf_hash_table (info);
7063 dynobj = elf_hash_table (info)->dynobj;
7064 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7065 if (htab->is_vxworks)
7066 splt = bfd_get_section_by_name (dynobj, ".plt");
7067 else
7068 splt = NULL;
7069
7070 got = 0;
7071 if (htab->elf.hgot != NULL)
7072 got = (htab->elf.hgot->root.u.def.value
7073 + htab->elf.hgot->root.u.def.section->output_section->vma
7074 + htab->elf.hgot->root.u.def.section->output_offset);
7075
7076 if (htab->elf.dynamic_sections_created)
7077 {
7078 Elf32_External_Dyn *dyncon, *dynconend;
7079
7080 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7081
7082 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7083 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7084 for (; dyncon < dynconend; dyncon++)
7085 {
7086 Elf_Internal_Dyn dyn;
7087 asection *s;
7088
7089 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7090
7091 switch (dyn.d_tag)
7092 {
7093 case DT_PLTGOT:
7094 if (htab->is_vxworks)
7095 s = htab->sgotplt;
7096 else
7097 s = htab->plt;
7098 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7099 break;
7100
7101 case DT_PLTRELSZ:
7102 dyn.d_un.d_val = htab->relplt->size;
7103 break;
7104
7105 case DT_JMPREL:
7106 s = htab->relplt;
7107 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7108 break;
7109
7110 case DT_PPC_GOT:
7111 dyn.d_un.d_ptr = got;
7112 break;
7113
7114 case DT_RELASZ:
7115 if (htab->is_vxworks)
7116 {
7117 if (htab->relplt)
7118 dyn.d_un.d_ptr -= htab->relplt->size;
7119 break;
7120 }
7121 continue;
7122
7123 default:
7124 continue;
7125 }
7126
7127 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7128 }
7129 }
7130
7131 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7132 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7133 if (htab->got != NULL)
7134 {
7135 unsigned char *p = htab->got->contents;
7136 bfd_vma val;
7137
7138 p += htab->elf.hgot->root.u.def.value;
7139 if (htab->plt_type == PLT_OLD)
7140 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7141
7142 val = 0;
7143 if (sdyn != NULL)
7144 val = sdyn->output_section->vma + sdyn->output_offset;
7145 bfd_put_32 (output_bfd, val, p);
7146
7147 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7148 }
7149
7150 /* Fill in the first entry in the VxWorks procedure linkage table. */
7151 if (splt && splt->size > 0)
7152 {
7153 /* Use the right PLT. */
7154 static const bfd_vma *plt_entry = NULL;
7155 plt_entry = info->shared ?
7156 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7157
7158 if (!info->shared)
7159 {
7160 bfd_vma got_value =
7161 (htab->elf.hgot->root.u.def.section->output_section->vma
7162 + htab->elf.hgot->root.u.def.section->output_offset
7163 + htab->elf.hgot->root.u.def.value);
7164 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7165
7166 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7167 splt->contents + 0);
7168 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7169 splt->contents + 4);
7170 }
7171 else
7172 {
7173 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7174 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7175 }
7176 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7177 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7178 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7179 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7180 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7181 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7182
7183 if (! info->shared)
7184 {
7185 Elf_Internal_Rela rela;
7186 bfd_byte *loc;
7187
7188 loc = htab->srelplt2->contents;
7189
7190 /* Output the @ha relocation for the first instruction. */
7191 rela.r_offset = (htab->plt->output_section->vma
7192 + htab->plt->output_offset
7193 + 2);
7194 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7195 rela.r_addend = 0;
7196 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7197 loc += sizeof (Elf32_External_Rela);
7198
7199 /* Output the @l relocation for the second instruction. */
7200 rela.r_offset = (htab->plt->output_section->vma
7201 + htab->plt->output_offset
7202 + 6);
7203 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7204 rela.r_addend = 0;
7205 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7206 loc += sizeof (Elf32_External_Rela);
7207
7208 /* Fix up the remaining relocations. They may have the wrong
7209 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7210 in which symbols were output. */
7211 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7212 {
7213 Elf_Internal_Rela rel;
7214
7215 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7216 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7217 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7218 loc += sizeof (Elf32_External_Rela);
7219
7220 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7221 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7222 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7223 loc += sizeof (Elf32_External_Rela);
7224
7225 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7226 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7227 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7228 loc += sizeof (Elf32_External_Rela);
7229 }
7230 }
7231 }
7232
7233 if (htab->glink != NULL && htab->glink->contents != NULL)
7234 {
7235 unsigned char *p;
7236 unsigned char *endp;
7237 bfd_vma res0;
7238 unsigned int i;
7239
7240 /*
7241 * PIC glink code is the following:
7242 *
7243 * # ith PLT code stub.
7244 * addis 11,30,(plt+(i-1)*4-got)@ha
7245 * lwz 11,(plt+(i-1)*4-got)@l(11)
7246 * mtctr 11
7247 * bctr
7248 *
7249 * # A table of branches, one for each plt entry.
7250 * # The idea is that the plt call stub loads ctr (and r11) with these
7251 * # addresses, so (r11 - res_0) gives the plt index * 4.
7252 * res_0: b PLTresolve
7253 * res_1: b PLTresolve
7254 * .
7255 * # Some number of entries towards the end can be nops
7256 * res_n_m3: nop
7257 * res_n_m2: nop
7258 * res_n_m1:
7259 *
7260 * PLTresolve:
7261 * addis 11,11,(1f-res_0)@ha
7262 * mflr 0
7263 * bcl 20,31,1f
7264 * 1: addi 11,11,(1b-res_0)@l
7265 * mflr 12
7266 * mtlr 0
7267 * sub 11,11,12 # r11 = index * 4
7268 * addis 12,12,(got+4-1b)@ha
7269 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7270 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7271 * mtctr 0
7272 * add 0,11,11
7273 * add 11,0,11 # r11 = index * 12 = reloc offset.
7274 * bctr
7275 */
7276 static const unsigned int pic_plt_resolve[] =
7277 {
7278 ADDIS_11_11,
7279 MFLR_0,
7280 BCL_20_31,
7281 ADDI_11_11,
7282 MFLR_12,
7283 MTLR_0,
7284 SUB_11_11_12,
7285 ADDIS_12_12,
7286 LWZ_0_12,
7287 LWZ_12_12,
7288 MTCTR_0,
7289 ADD_0_11_11,
7290 ADD_11_0_11,
7291 BCTR,
7292 NOP,
7293 NOP
7294 };
7295
7296 static const unsigned int plt_resolve[] =
7297 {
7298 LIS_12,
7299 ADDIS_11_11,
7300 LWZ_0_12,
7301 ADDI_11_11,
7302 MTCTR_0,
7303 ADD_0_11_11,
7304 LWZ_12_12,
7305 ADD_11_0_11,
7306 BCTR,
7307 NOP,
7308 NOP,
7309 NOP,
7310 NOP,
7311 NOP,
7312 NOP,
7313 NOP
7314 };
7315
7316 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7317 abort ();
7318 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7319 abort ();
7320
7321 /* Build the branch table, one for each plt entry (less one),
7322 and perhaps some padding. */
7323 p = htab->glink->contents;
7324 p += htab->glink_pltresolve;
7325 endp = htab->glink->contents;
7326 endp += htab->glink->size - GLINK_PLTRESOLVE;
7327 while (p < endp - 8 * 4)
7328 {
7329 bfd_put_32 (output_bfd, B + endp - p, p);
7330 p += 4;
7331 }
7332 while (p < endp)
7333 {
7334 bfd_put_32 (output_bfd, NOP, p);
7335 p += 4;
7336 }
7337
7338 res0 = (htab->glink_pltresolve
7339 + htab->glink->output_section->vma
7340 + htab->glink->output_offset);
7341
7342 /* Last comes the PLTresolve stub. */
7343 if (info->shared || info->pie)
7344 {
7345 bfd_vma bcl;
7346
7347 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7348 {
7349 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7350 p += 4;
7351 }
7352 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7353
7354 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7355 + htab->glink->output_section->vma
7356 + htab->glink->output_offset);
7357
7358 bfd_put_32 (output_bfd,
7359 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7360 bfd_put_32 (output_bfd,
7361 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7362 bfd_put_32 (output_bfd,
7363 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7364 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7365 {
7366 bfd_put_32 (output_bfd,
7367 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7368 bfd_put_32 (output_bfd,
7369 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7370 }
7371 else
7372 {
7373 bfd_put_32 (output_bfd,
7374 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7375 bfd_put_32 (output_bfd,
7376 LWZ_12_12 + 4, p + 9*4);
7377 }
7378 }
7379 else
7380 {
7381 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7382 {
7383 bfd_put_32 (output_bfd, plt_resolve[i], p);
7384 p += 4;
7385 }
7386 p -= 4 * ARRAY_SIZE (plt_resolve);
7387
7388 bfd_put_32 (output_bfd,
7389 LIS_12 + PPC_HA (got + 4), p + 0*4);
7390 bfd_put_32 (output_bfd,
7391 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7392 bfd_put_32 (output_bfd,
7393 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7394 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7395 {
7396 bfd_put_32 (output_bfd,
7397 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7398 bfd_put_32 (output_bfd,
7399 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7400 }
7401 else
7402 {
7403 bfd_put_32 (output_bfd,
7404 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7405 bfd_put_32 (output_bfd,
7406 LWZ_12_12 + 4, p + 6*4);
7407 }
7408 }
7409 }
7410
7411 return TRUE;
7412 }
7413 \f
7414 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7415 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7416 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7417 #define TARGET_BIG_NAME "elf32-powerpc"
7418 #define ELF_ARCH bfd_arch_powerpc
7419 #define ELF_MACHINE_CODE EM_PPC
7420 #ifdef __QNXTARGET__
7421 #define ELF_MAXPAGESIZE 0x1000
7422 #else
7423 #define ELF_MAXPAGESIZE 0x10000
7424 #endif
7425 #define ELF_MINPAGESIZE 0x1000
7426 #define elf_info_to_howto ppc_elf_info_to_howto
7427
7428 #ifdef EM_CYGNUS_POWERPC
7429 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7430 #endif
7431
7432 #ifdef EM_PPC_OLD
7433 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7434 #endif
7435
7436 #define elf_backend_plt_not_loaded 1
7437 #define elf_backend_can_gc_sections 1
7438 #define elf_backend_can_refcount 1
7439 #define elf_backend_rela_normal 1
7440
7441 #define bfd_elf32_mkobject ppc_elf_mkobject
7442 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7443 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7444 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7445 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7446 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7447
7448 #define elf_backend_object_p ppc_elf_object_p
7449 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7450 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7451 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7452 #define elf_backend_relocate_section ppc_elf_relocate_section
7453 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7454 #define elf_backend_check_relocs ppc_elf_check_relocs
7455 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7456 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7457 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7458 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7459 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7460 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7461 #define elf_backend_fake_sections ppc_elf_fake_sections
7462 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7463 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7464 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7465 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7466 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7467 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7468 #define elf_backend_write_section ppc_elf_write_section
7469 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7470 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7471 #define elf_backend_action_discarded ppc_elf_action_discarded
7472
7473 #include "elf32-target.h"
7474
7475 /* VxWorks Target */
7476
7477 #undef TARGET_LITTLE_SYM
7478 #undef TARGET_LITTLE_NAME
7479
7480 #undef TARGET_BIG_SYM
7481 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7482 #undef TARGET_BIG_NAME
7483 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7484
7485 /* VxWorks uses the elf default section flags for .plt. */
7486 static const struct bfd_elf_special_section *
7487 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7488 {
7489 if (sec->name == NULL)
7490 return NULL;
7491
7492 if (strcmp (sec->name, ".plt") == 0)
7493 return _bfd_elf_get_sec_type_attr (abfd, sec);
7494
7495 return ppc_elf_get_sec_type_attr (abfd, sec);
7496 }
7497
7498 /* Like ppc_elf_link_hash_table_create, but overrides
7499 appropriately for VxWorks. */
7500 static struct bfd_link_hash_table *
7501 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7502 {
7503 struct bfd_link_hash_table *ret;
7504
7505 ret = ppc_elf_link_hash_table_create (abfd);
7506 if (ret)
7507 {
7508 struct ppc_elf_link_hash_table *htab
7509 = (struct ppc_elf_link_hash_table *)ret;
7510 htab->is_vxworks = 1;
7511 htab->plt_type = PLT_VXWORKS;
7512 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7513 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7514 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7515 }
7516 return ret;
7517 }
7518
7519 /* Tweak magic VxWorks symbols as they are loaded. */
7520 static bfd_boolean
7521 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7522 struct bfd_link_info *info,
7523 Elf_Internal_Sym *sym,
7524 const char **namep ATTRIBUTE_UNUSED,
7525 flagword *flagsp ATTRIBUTE_UNUSED,
7526 asection **secp,
7527 bfd_vma *valp)
7528 {
7529 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7530 valp))
7531 return FALSE;
7532
7533 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7534 }
7535
7536 static void
7537 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7538 {
7539 ppc_elf_final_write_processing(abfd, linker);
7540 elf_vxworks_final_write_processing(abfd, linker);
7541 }
7542
7543 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7544 define it. */
7545 #undef elf_backend_want_plt_sym
7546 #define elf_backend_want_plt_sym 1
7547 #undef elf_backend_want_got_plt
7548 #define elf_backend_want_got_plt 1
7549 #undef elf_backend_got_symbol_offset
7550 #define elf_backend_got_symbol_offset 0
7551 #undef elf_backend_plt_not_loaded
7552 #define elf_backend_plt_not_loaded 0
7553 #undef elf_backend_plt_readonly
7554 #define elf_backend_plt_readonly 1
7555 #undef elf_backend_got_header_size
7556 #define elf_backend_got_header_size 12
7557
7558 #undef bfd_elf32_bfd_link_hash_table_create
7559 #define bfd_elf32_bfd_link_hash_table_create \
7560 ppc_elf_vxworks_link_hash_table_create
7561 #undef elf_backend_add_symbol_hook
7562 #define elf_backend_add_symbol_hook \
7563 ppc_elf_vxworks_add_symbol_hook
7564 #undef elf_backend_link_output_symbol_hook
7565 #define elf_backend_link_output_symbol_hook \
7566 elf_vxworks_link_output_symbol_hook
7567 #undef elf_backend_final_write_processing
7568 #define elf_backend_final_write_processing \
7569 ppc_elf_vxworks_final_write_processing
7570 #undef elf_backend_get_sec_type_attr
7571 #define elf_backend_get_sec_type_attr \
7572 ppc_elf_vxworks_get_sec_type_attr
7573 #undef elf_backend_emit_relocs
7574 #define elf_backend_emit_relocs \
7575 elf_vxworks_emit_relocs
7576
7577 #undef elf32_bed
7578 #define elf32_bed ppc_elf_vxworks_bed
7579
7580 #include "elf32-target.h"
GDB Binutils - Deliverables
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