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[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_powerpc_vxworks_vec;
2683 extern const bfd_target bfd_elf32_powerpcle_vec;
2684
2685 return (targ == &bfd_elf32_powerpc_vec
2686 || targ == &bfd_elf32_powerpc_vxworks_vec
2687 || targ == &bfd_elf32_powerpcle_vec);
2688 }
2689
2690 /* Hook called by the linker routine which adds symbols from an object
2691 file. We use it to put .comm items in .sbss, and not .bss. */
2692
2693 static bfd_boolean
2694 ppc_elf_add_symbol_hook (bfd *abfd,
2695 struct bfd_link_info *info,
2696 Elf_Internal_Sym *sym,
2697 const char **namep ATTRIBUTE_UNUSED,
2698 flagword *flagsp ATTRIBUTE_UNUSED,
2699 asection **secp,
2700 bfd_vma *valp)
2701 {
2702 if (sym->st_shndx == SHN_COMMON
2703 && !info->relocatable
2704 && sym->st_size <= elf_gp_size (abfd)
2705 && is_ppc_elf_target (info->hash->creator))
2706 {
2707 /* Common symbols less than or equal to -G nn bytes are automatically
2708 put into .sbss. */
2709 struct ppc_elf_link_hash_table *htab;
2710
2711 htab = ppc_elf_hash_table (info);
2712 if (htab->sbss == NULL)
2713 {
2714 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2715
2716 if (!htab->elf.dynobj)
2717 htab->elf.dynobj = abfd;
2718
2719 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2720 ".sbss",
2721 flags);
2722 if (htab->sbss == NULL)
2723 return FALSE;
2724 }
2725
2726 *secp = htab->sbss;
2727 *valp = sym->st_size;
2728 }
2729
2730 return TRUE;
2731 }
2732 \f
2733 static bfd_boolean
2734 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2735 elf_linker_section_t *lsect)
2736 {
2737 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2738 TRUE, FALSE, TRUE);
2739 if (lsect->sym == NULL)
2740 return FALSE;
2741 if (lsect->sym->root.type == bfd_link_hash_new)
2742 lsect->sym->non_elf = 0;
2743 lsect->sym->ref_regular = 1;
2744 return TRUE;
2745 }
2746
2747 /* Create a special linker section. */
2748
2749 static bfd_boolean
2750 ppc_elf_create_linker_section (bfd *abfd,
2751 struct bfd_link_info *info,
2752 flagword flags,
2753 elf_linker_section_t *lsect)
2754 {
2755 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2756 asection *s;
2757
2758 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2759 | SEC_LINKER_CREATED);
2760
2761 /* Record the first bfd that needs the special sections. */
2762 if (!htab->elf.dynobj)
2763 htab->elf.dynobj = abfd;
2764
2765 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2766 lsect->name,
2767 flags);
2768 if (s == NULL
2769 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2770 return FALSE;
2771 lsect->section = s;
2772
2773 return create_sdata_sym (htab, lsect);
2774 }
2775
2776 /* Find a linker generated pointer with a given addend and type. */
2777
2778 static elf_linker_section_pointers_t *
2779 elf_find_pointer_linker_section
2780 (elf_linker_section_pointers_t *linker_pointers,
2781 bfd_vma addend,
2782 elf_linker_section_t *lsect)
2783 {
2784 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2785 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2786 return linker_pointers;
2787
2788 return NULL;
2789 }
2790
2791 /* Allocate a pointer to live in a linker created section. */
2792
2793 static bfd_boolean
2794 elf_create_pointer_linker_section (bfd *abfd,
2795 elf_linker_section_t *lsect,
2796 struct elf_link_hash_entry *h,
2797 const Elf_Internal_Rela *rel)
2798 {
2799 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2800 elf_linker_section_pointers_t *linker_section_ptr;
2801 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2802 bfd_size_type amt;
2803
2804 BFD_ASSERT (lsect != NULL);
2805
2806 /* Is this a global symbol? */
2807 if (h != NULL)
2808 {
2809 struct ppc_elf_link_hash_entry *eh;
2810
2811 /* Has this symbol already been allocated? If so, our work is done. */
2812 eh = (struct ppc_elf_link_hash_entry *) h;
2813 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2814 rel->r_addend,
2815 lsect))
2816 return TRUE;
2817
2818 ptr_linker_section_ptr = &eh->linker_section_pointer;
2819 }
2820 else
2821 {
2822 /* Allocation of a pointer to a local symbol. */
2823 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2824
2825 /* Allocate a table to hold the local symbols if first time. */
2826 if (!ptr)
2827 {
2828 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2829
2830 amt = num_symbols;
2831 amt *= sizeof (elf_linker_section_pointers_t *);
2832 ptr = bfd_zalloc (abfd, amt);
2833
2834 if (!ptr)
2835 return FALSE;
2836
2837 elf_local_ptr_offsets (abfd) = ptr;
2838 }
2839
2840 /* Has this symbol already been allocated? If so, our work is done. */
2841 if (elf_find_pointer_linker_section (ptr[r_symndx],
2842 rel->r_addend,
2843 lsect))
2844 return TRUE;
2845
2846 ptr_linker_section_ptr = &ptr[r_symndx];
2847 }
2848
2849 /* Allocate space for a pointer in the linker section, and allocate
2850 a new pointer record from internal memory. */
2851 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2852 amt = sizeof (elf_linker_section_pointers_t);
2853 linker_section_ptr = bfd_alloc (abfd, amt);
2854
2855 if (!linker_section_ptr)
2856 return FALSE;
2857
2858 linker_section_ptr->next = *ptr_linker_section_ptr;
2859 linker_section_ptr->addend = rel->r_addend;
2860 linker_section_ptr->lsect = lsect;
2861 *ptr_linker_section_ptr = linker_section_ptr;
2862
2863 linker_section_ptr->offset = lsect->section->size;
2864 lsect->section->size += 4;
2865
2866 #ifdef DEBUG
2867 fprintf (stderr,
2868 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2869 lsect->name, (long) linker_section_ptr->offset,
2870 (long) lsect->section->size);
2871 #endif
2872
2873 return TRUE;
2874 }
2875
2876 static bfd_boolean
2877 update_local_sym_info (bfd *abfd,
2878 Elf_Internal_Shdr *symtab_hdr,
2879 unsigned long r_symndx,
2880 int tls_type)
2881 {
2882 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2883 char *local_got_tls_masks;
2884
2885 if (local_got_refcounts == NULL)
2886 {
2887 bfd_size_type size = symtab_hdr->sh_info;
2888
2889 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2890 local_got_refcounts = bfd_zalloc (abfd, size);
2891 if (local_got_refcounts == NULL)
2892 return FALSE;
2893 elf_local_got_refcounts (abfd) = local_got_refcounts;
2894 }
2895
2896 local_got_refcounts[r_symndx] += 1;
2897 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2898 local_got_tls_masks[r_symndx] |= tls_type;
2899 return TRUE;
2900 }
2901
2902 static bfd_boolean
2903 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2904 asection *sec, bfd_vma addend)
2905 {
2906 struct plt_entry *ent;
2907
2908 if (addend < 32768)
2909 sec = NULL;
2910 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2911 if (ent->sec == sec && ent->addend == addend)
2912 break;
2913 if (ent == NULL)
2914 {
2915 bfd_size_type amt = sizeof (*ent);
2916 ent = bfd_alloc (abfd, amt);
2917 if (ent == NULL)
2918 return FALSE;
2919 ent->next = h->plt.plist;
2920 ent->sec = sec;
2921 ent->addend = addend;
2922 ent->plt.refcount = 0;
2923 h->plt.plist = ent;
2924 }
2925 ent->plt.refcount += 1;
2926 return TRUE;
2927 }
2928
2929 static struct plt_entry *
2930 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2931 {
2932 struct plt_entry *ent;
2933
2934 if (addend < 32768)
2935 sec = NULL;
2936 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2937 if (ent->sec == sec && ent->addend == addend)
2938 break;
2939 return ent;
2940 }
2941
2942 static void
2943 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2944 {
2945 (*_bfd_error_handler)
2946 (_("%B: relocation %s cannot be used when making a shared object"),
2947 abfd,
2948 ppc_elf_howto_table[r_type]->name);
2949 bfd_set_error (bfd_error_bad_value);
2950 }
2951
2952 /* Look through the relocs for a section during the first phase, and
2953 allocate space in the global offset table or procedure linkage
2954 table. */
2955
2956 static bfd_boolean
2957 ppc_elf_check_relocs (bfd *abfd,
2958 struct bfd_link_info *info,
2959 asection *sec,
2960 const Elf_Internal_Rela *relocs)
2961 {
2962 struct ppc_elf_link_hash_table *htab;
2963 Elf_Internal_Shdr *symtab_hdr;
2964 struct elf_link_hash_entry **sym_hashes;
2965 const Elf_Internal_Rela *rel;
2966 const Elf_Internal_Rela *rel_end;
2967 asection *got2, *sreloc;
2968
2969 if (info->relocatable)
2970 return TRUE;
2971
2972 /* Don't do anything special with non-loaded, non-alloced sections.
2973 In particular, any relocs in such sections should not affect GOT
2974 and PLT reference counting (ie. we don't allow them to create GOT
2975 or PLT entries), there's no possibility or desire to optimize TLS
2976 relocs, and there's not much point in propagating relocs to shared
2977 libs that the dynamic linker won't relocate. */
2978 if ((sec->flags & SEC_ALLOC) == 0)
2979 return TRUE;
2980
2981 #ifdef DEBUG
2982 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2983 sec, abfd);
2984 #endif
2985
2986 /* Initialize howto table if not already done. */
2987 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2988 ppc_elf_howto_init ();
2989
2990 htab = ppc_elf_hash_table (info);
2991 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2992 sym_hashes = elf_sym_hashes (abfd);
2993 got2 = bfd_get_section_by_name (abfd, ".got2");
2994 sreloc = NULL;
2995
2996 rel_end = relocs + sec->reloc_count;
2997 for (rel = relocs; rel < rel_end; rel++)
2998 {
2999 unsigned long r_symndx;
3000 enum elf_ppc_reloc_type r_type;
3001 struct elf_link_hash_entry *h;
3002 int tls_type = 0;
3003
3004 r_symndx = ELF32_R_SYM (rel->r_info);
3005 if (r_symndx < symtab_hdr->sh_info)
3006 h = NULL;
3007 else
3008 {
3009 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3010 while (h->root.type == bfd_link_hash_indirect
3011 || h->root.type == bfd_link_hash_warning)
3012 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3013 }
3014
3015 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3016 This shows up in particular in an R_PPC_ADDR32 in the eabi
3017 startup code. */
3018 if (h != NULL
3019 && htab->got == NULL
3020 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3021 {
3022 if (htab->elf.dynobj == NULL)
3023 htab->elf.dynobj = abfd;
3024 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3025 return FALSE;
3026 BFD_ASSERT (h == htab->elf.hgot);
3027 }
3028
3029 r_type = ELF32_R_TYPE (rel->r_info);
3030 switch (r_type)
3031 {
3032 case R_PPC_GOT_TLSLD16:
3033 case R_PPC_GOT_TLSLD16_LO:
3034 case R_PPC_GOT_TLSLD16_HI:
3035 case R_PPC_GOT_TLSLD16_HA:
3036 htab->tlsld_got.refcount += 1;
3037 tls_type = TLS_TLS | TLS_LD;
3038 goto dogottls;
3039
3040 case R_PPC_GOT_TLSGD16:
3041 case R_PPC_GOT_TLSGD16_LO:
3042 case R_PPC_GOT_TLSGD16_HI:
3043 case R_PPC_GOT_TLSGD16_HA:
3044 tls_type = TLS_TLS | TLS_GD;
3045 goto dogottls;
3046
3047 case R_PPC_GOT_TPREL16:
3048 case R_PPC_GOT_TPREL16_LO:
3049 case R_PPC_GOT_TPREL16_HI:
3050 case R_PPC_GOT_TPREL16_HA:
3051 if (info->shared)
3052 info->flags |= DF_STATIC_TLS;
3053 tls_type = TLS_TLS | TLS_TPREL;
3054 goto dogottls;
3055
3056 case R_PPC_GOT_DTPREL16:
3057 case R_PPC_GOT_DTPREL16_LO:
3058 case R_PPC_GOT_DTPREL16_HI:
3059 case R_PPC_GOT_DTPREL16_HA:
3060 tls_type = TLS_TLS | TLS_DTPREL;
3061 dogottls:
3062 sec->has_tls_reloc = 1;
3063 /* Fall thru */
3064
3065 /* GOT16 relocations */
3066 case R_PPC_GOT16:
3067 case R_PPC_GOT16_LO:
3068 case R_PPC_GOT16_HI:
3069 case R_PPC_GOT16_HA:
3070 /* This symbol requires a global offset table entry. */
3071 if (htab->got == NULL)
3072 {
3073 if (htab->elf.dynobj == NULL)
3074 htab->elf.dynobj = abfd;
3075 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3076 return FALSE;
3077 }
3078 if (h != NULL)
3079 {
3080 h->got.refcount += 1;
3081 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3082 }
3083 else
3084 /* This is a global offset table entry for a local symbol. */
3085 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3086 return FALSE;
3087 break;
3088
3089 /* Indirect .sdata relocation. */
3090 case R_PPC_EMB_SDAI16:
3091 if (info->shared)
3092 {
3093 bad_shared_reloc (abfd, r_type);
3094 return FALSE;
3095 }
3096 if (htab->sdata[0].section == NULL
3097 && !ppc_elf_create_linker_section (abfd, info, 0,
3098 &htab->sdata[0]))
3099 return FALSE;
3100 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3101 h, rel))
3102 return FALSE;
3103 if (h != NULL)
3104 {
3105 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3106 h->non_got_ref = TRUE;
3107 }
3108 break;
3109
3110 /* Indirect .sdata2 relocation. */
3111 case R_PPC_EMB_SDA2I16:
3112 if (info->shared)
3113 {
3114 bad_shared_reloc (abfd, r_type);
3115 return FALSE;
3116 }
3117 if (htab->sdata[1].section == NULL
3118 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3119 &htab->sdata[1]))
3120 return FALSE;
3121 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3122 h, rel))
3123 return FALSE;
3124 if (h != NULL)
3125 {
3126 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3127 h->non_got_ref = TRUE;
3128 }
3129 break;
3130
3131 case R_PPC_SDAREL16:
3132 if (info->shared)
3133 {
3134 bad_shared_reloc (abfd, r_type);
3135 return FALSE;
3136 }
3137 if (htab->sdata[0].sym == NULL
3138 && !create_sdata_sym (htab, &htab->sdata[0]))
3139 return FALSE;
3140 if (h != NULL)
3141 {
3142 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3143 h->non_got_ref = TRUE;
3144 }
3145 break;
3146
3147 case R_PPC_EMB_SDA2REL:
3148 if (info->shared)
3149 {
3150 bad_shared_reloc (abfd, r_type);
3151 return FALSE;
3152 }
3153 if (htab->sdata[1].sym == NULL
3154 && !create_sdata_sym (htab, &htab->sdata[1]))
3155 return FALSE;
3156 if (h != NULL)
3157 {
3158 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3159 h->non_got_ref = TRUE;
3160 }
3161 break;
3162
3163 case R_PPC_EMB_SDA21:
3164 case R_PPC_EMB_RELSDA:
3165 if (info->shared)
3166 {
3167 bad_shared_reloc (abfd, r_type);
3168 return FALSE;
3169 }
3170 if (htab->sdata[0].sym == NULL
3171 && !create_sdata_sym (htab, &htab->sdata[0]))
3172 return FALSE;
3173 if (htab->sdata[1].sym == NULL
3174 && !create_sdata_sym (htab, &htab->sdata[1]))
3175 return FALSE;
3176 if (h != NULL)
3177 {
3178 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3179 h->non_got_ref = TRUE;
3180 }
3181 break;
3182
3183 case R_PPC_EMB_NADDR32:
3184 case R_PPC_EMB_NADDR16:
3185 case R_PPC_EMB_NADDR16_LO:
3186 case R_PPC_EMB_NADDR16_HI:
3187 case R_PPC_EMB_NADDR16_HA:
3188 if (info->shared)
3189 {
3190 bad_shared_reloc (abfd, r_type);
3191 return FALSE;
3192 }
3193 if (h != NULL)
3194 h->non_got_ref = TRUE;
3195 break;
3196
3197 case R_PPC_PLT32:
3198 case R_PPC_PLTREL24:
3199 case R_PPC_PLTREL32:
3200 case R_PPC_PLT16_LO:
3201 case R_PPC_PLT16_HI:
3202 case R_PPC_PLT16_HA:
3203 #ifdef DEBUG
3204 fprintf (stderr, "Reloc requires a PLT entry\n");
3205 #endif
3206 /* This symbol requires a procedure linkage table entry. We
3207 actually build the entry in finish_dynamic_symbol,
3208 because this might be a case of linking PIC code without
3209 linking in any dynamic objects, in which case we don't
3210 need to generate a procedure linkage table after all. */
3211
3212 if (h == NULL)
3213 {
3214 /* It does not make sense to have a procedure linkage
3215 table entry for a local symbol. */
3216 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3217 "local symbol"),
3218 abfd,
3219 sec,
3220 (long) rel->r_offset,
3221 ppc_elf_howto_table[r_type]->name);
3222 bfd_set_error (bfd_error_bad_value);
3223 return FALSE;
3224 }
3225 else
3226 {
3227 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3228
3229 h->needs_plt = 1;
3230 if (!update_plt_info (abfd, h, got2, addend))
3231 return FALSE;
3232 }
3233 break;
3234
3235 /* The following relocations don't need to propagate the
3236 relocation if linking a shared object since they are
3237 section relative. */
3238 case R_PPC_SECTOFF:
3239 case R_PPC_SECTOFF_LO:
3240 case R_PPC_SECTOFF_HI:
3241 case R_PPC_SECTOFF_HA:
3242 case R_PPC_DTPREL16:
3243 case R_PPC_DTPREL16_LO:
3244 case R_PPC_DTPREL16_HI:
3245 case R_PPC_DTPREL16_HA:
3246 case R_PPC_TOC16:
3247 break;
3248
3249 case R_PPC_REL16:
3250 case R_PPC_REL16_LO:
3251 case R_PPC_REL16_HI:
3252 case R_PPC_REL16_HA:
3253 htab->can_use_new_plt = 1;
3254 break;
3255
3256 /* These are just markers. */
3257 case R_PPC_TLS:
3258 case R_PPC_EMB_MRKREF:
3259 case R_PPC_NONE:
3260 case R_PPC_max:
3261 break;
3262
3263 /* These should only appear in dynamic objects. */
3264 case R_PPC_COPY:
3265 case R_PPC_GLOB_DAT:
3266 case R_PPC_JMP_SLOT:
3267 case R_PPC_RELATIVE:
3268 break;
3269
3270 /* These aren't handled yet. We'll report an error later. */
3271 case R_PPC_ADDR30:
3272 case R_PPC_EMB_RELSEC16:
3273 case R_PPC_EMB_RELST_LO:
3274 case R_PPC_EMB_RELST_HI:
3275 case R_PPC_EMB_RELST_HA:
3276 case R_PPC_EMB_BIT_FLD:
3277 break;
3278
3279 /* This refers only to functions defined in the shared library. */
3280 case R_PPC_LOCAL24PC:
3281 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3282 htab->plt_type = PLT_OLD;
3283 break;
3284
3285 /* This relocation describes the C++ object vtable hierarchy.
3286 Reconstruct it for later use during GC. */
3287 case R_PPC_GNU_VTINHERIT:
3288 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3289 return FALSE;
3290 break;
3291
3292 /* This relocation describes which C++ vtable entries are actually
3293 used. Record for later use during GC. */
3294 case R_PPC_GNU_VTENTRY:
3295 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3296 return FALSE;
3297 break;
3298
3299 /* We shouldn't really be seeing these. */
3300 case R_PPC_TPREL32:
3301 if (info->shared)
3302 info->flags |= DF_STATIC_TLS;
3303 goto dodyn;
3304
3305 /* Nor these. */
3306 case R_PPC_DTPMOD32:
3307 case R_PPC_DTPREL32:
3308 goto dodyn;
3309
3310 case R_PPC_TPREL16:
3311 case R_PPC_TPREL16_LO:
3312 case R_PPC_TPREL16_HI:
3313 case R_PPC_TPREL16_HA:
3314 if (info->shared)
3315 info->flags |= DF_STATIC_TLS;
3316 goto dodyn;
3317
3318 case R_PPC_REL32:
3319 if (h == NULL
3320 && got2 != NULL
3321 && (sec->flags & SEC_CODE) != 0
3322 && (info->shared || info->pie)
3323 && htab->plt_type == PLT_UNSET)
3324 {
3325 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3326 the start of a function, which assembles to a REL32
3327 reference to .got2. If we detect one of these, then
3328 force the old PLT layout because the linker cannot
3329 reliably deduce the GOT pointer value needed for
3330 PLT call stubs. */
3331 asection *s;
3332
3333 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3334 r_symndx);
3335 if (s == got2)
3336 htab->plt_type = PLT_OLD;
3337 }
3338 /* fall through */
3339
3340 case R_PPC_REL24:
3341 case R_PPC_REL14:
3342 case R_PPC_REL14_BRTAKEN:
3343 case R_PPC_REL14_BRNTAKEN:
3344 if (h == NULL)
3345 break;
3346 if (h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3347 {
3348 htab->plt_type = PLT_OLD;
3349 break;
3350 }
3351 /* fall through */
3352
3353 case R_PPC_ADDR32:
3354 case R_PPC_ADDR24:
3355 case R_PPC_ADDR16:
3356 case R_PPC_ADDR16_LO:
3357 case R_PPC_ADDR16_HI:
3358 case R_PPC_ADDR16_HA:
3359 case R_PPC_ADDR14:
3360 case R_PPC_ADDR14_BRTAKEN:
3361 case R_PPC_ADDR14_BRNTAKEN:
3362 case R_PPC_UADDR32:
3363 case R_PPC_UADDR16:
3364 if (h != NULL && !info->shared)
3365 {
3366 /* We may need a plt entry if the symbol turns out to be
3367 a function defined in a dynamic object. */
3368 if (!update_plt_info (abfd, h, NULL, 0))
3369 return FALSE;
3370
3371 /* We may need a copy reloc too. */
3372 h->non_got_ref = 1;
3373 }
3374
3375 dodyn:
3376 /* If we are creating a shared library, and this is a reloc
3377 against a global symbol, or a non PC relative reloc
3378 against a local symbol, then we need to copy the reloc
3379 into the shared library. However, if we are linking with
3380 -Bsymbolic, we do not need to copy a reloc against a
3381 global symbol which is defined in an object we are
3382 including in the link (i.e., DEF_REGULAR is set). At
3383 this point we have not seen all the input files, so it is
3384 possible that DEF_REGULAR is not set now but will be set
3385 later (it is never cleared). In case of a weak definition,
3386 DEF_REGULAR may be cleared later by a strong definition in
3387 a shared library. We account for that possibility below by
3388 storing information in the dyn_relocs field of the hash
3389 table entry. A similar situation occurs when creating
3390 shared libraries and symbol visibility changes render the
3391 symbol local.
3392
3393 If on the other hand, we are creating an executable, we
3394 may need to keep relocations for symbols satisfied by a
3395 dynamic library if we manage to avoid copy relocs for the
3396 symbol. */
3397 if ((info->shared
3398 && (MUST_BE_DYN_RELOC (r_type)
3399 || (h != NULL
3400 && (! info->symbolic
3401 || h->root.type == bfd_link_hash_defweak
3402 || !h->def_regular))))
3403 || (ELIMINATE_COPY_RELOCS
3404 && !info->shared
3405 && h != NULL
3406 && (h->root.type == bfd_link_hash_defweak
3407 || !h->def_regular)))
3408 {
3409 struct ppc_elf_dyn_relocs *p;
3410 struct ppc_elf_dyn_relocs **head;
3411
3412 #ifdef DEBUG
3413 fprintf (stderr,
3414 "ppc_elf_check_relocs needs to "
3415 "create relocation for %s\n",
3416 (h && h->root.root.string
3417 ? h->root.root.string : "<unknown>"));
3418 #endif
3419 if (sreloc == NULL)
3420 {
3421 const char *name;
3422
3423 name = (bfd_elf_string_from_elf_section
3424 (abfd,
3425 elf_elfheader (abfd)->e_shstrndx,
3426 elf_section_data (sec)->rel_hdr.sh_name));
3427 if (name == NULL)
3428 return FALSE;
3429
3430 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3431 && strcmp (bfd_get_section_name (abfd, sec),
3432 name + 5) == 0);
3433
3434 if (htab->elf.dynobj == NULL)
3435 htab->elf.dynobj = abfd;
3436 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3437 if (sreloc == NULL)
3438 {
3439 flagword flags;
3440
3441 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3442 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3443 | SEC_ALLOC | SEC_LOAD);
3444 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3445 name,
3446 flags);
3447 if (sreloc == NULL
3448 || ! bfd_set_section_alignment (htab->elf.dynobj,
3449 sreloc, 2))
3450 return FALSE;
3451 }
3452 elf_section_data (sec)->sreloc = sreloc;
3453 }
3454
3455 /* If this is a global symbol, we count the number of
3456 relocations we need for this symbol. */
3457 if (h != NULL)
3458 {
3459 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3460 }
3461 else
3462 {
3463 /* Track dynamic relocs needed for local syms too.
3464 We really need local syms available to do this
3465 easily. Oh well. */
3466
3467 asection *s;
3468 void *vpp;
3469
3470 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3471 sec, r_symndx);
3472 if (s == NULL)
3473 return FALSE;
3474
3475 vpp = &elf_section_data (s)->local_dynrel;
3476 head = (struct ppc_elf_dyn_relocs **) vpp;
3477 }
3478
3479 p = *head;
3480 if (p == NULL || p->sec != sec)
3481 {
3482 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3483 if (p == NULL)
3484 return FALSE;
3485 p->next = *head;
3486 *head = p;
3487 p->sec = sec;
3488 p->count = 0;
3489 p->pc_count = 0;
3490 }
3491
3492 p->count += 1;
3493 if (!MUST_BE_DYN_RELOC (r_type))
3494 p->pc_count += 1;
3495 }
3496
3497 break;
3498 }
3499 }
3500
3501 return TRUE;
3502 }
3503 \f
3504 /* Merge backend specific data from an object file to the output
3505 object file when linking. */
3506
3507 static bfd_boolean
3508 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3509 {
3510 flagword old_flags;
3511 flagword new_flags;
3512 bfd_boolean error;
3513
3514 if (!is_ppc_elf_target (ibfd->xvec)
3515 || !is_ppc_elf_target (obfd->xvec))
3516 return TRUE;
3517
3518 /* Check if we have the same endianess. */
3519 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3520 return FALSE;
3521
3522 new_flags = elf_elfheader (ibfd)->e_flags;
3523 old_flags = elf_elfheader (obfd)->e_flags;
3524 if (!elf_flags_init (obfd))
3525 {
3526 /* First call, no flags set. */
3527 elf_flags_init (obfd) = TRUE;
3528 elf_elfheader (obfd)->e_flags = new_flags;
3529 }
3530
3531 /* Compatible flags are ok. */
3532 else if (new_flags == old_flags)
3533 ;
3534
3535 /* Incompatible flags. */
3536 else
3537 {
3538 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3539 to be linked with either. */
3540 error = FALSE;
3541 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3542 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3543 {
3544 error = TRUE;
3545 (*_bfd_error_handler)
3546 (_("%B: compiled with -mrelocatable and linked with "
3547 "modules compiled normally"), ibfd);
3548 }
3549 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3550 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3551 {
3552 error = TRUE;
3553 (*_bfd_error_handler)
3554 (_("%B: compiled normally and linked with "
3555 "modules compiled with -mrelocatable"), ibfd);
3556 }
3557
3558 /* The output is -mrelocatable-lib iff both the input files are. */
3559 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3560 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3561
3562 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3563 but each input file is either -mrelocatable or -mrelocatable-lib. */
3564 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3565 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3566 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3567 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3568
3569 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3570 any module uses it. */
3571 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3572
3573 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3574 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3575
3576 /* Warn about any other mismatches. */
3577 if (new_flags != old_flags)
3578 {
3579 error = TRUE;
3580 (*_bfd_error_handler)
3581 (_("%B: uses different e_flags (0x%lx) fields "
3582 "than previous modules (0x%lx)"),
3583 ibfd, (long) new_flags, (long) old_flags);
3584 }
3585
3586 if (error)
3587 {
3588 bfd_set_error (bfd_error_bad_value);
3589 return FALSE;
3590 }
3591 }
3592
3593 return TRUE;
3594 }
3595 \f
3596 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3597 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3598 int
3599 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3600 struct bfd_link_info *info,
3601 int force_old_plt,
3602 int emit_stub_syms)
3603 {
3604 struct ppc_elf_link_hash_table *htab;
3605 flagword flags;
3606
3607 htab = ppc_elf_hash_table (info);
3608
3609 if (htab->plt_type == PLT_UNSET)
3610 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3611 ? PLT_OLD : PLT_NEW);
3612
3613 htab->emit_stub_syms = emit_stub_syms;
3614
3615 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3616
3617 if (htab->plt_type == PLT_NEW)
3618 {
3619 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3620 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3621
3622 /* The new PLT is a loaded section. */
3623 if (htab->plt != NULL
3624 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3625 return -1;
3626
3627 /* The new GOT is not executable. */
3628 if (htab->got != NULL
3629 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3630 return -1;
3631 }
3632 else
3633 {
3634 /* Stop an unused .glink section from affecting .text alignment. */
3635 if (htab->glink != NULL
3636 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3637 return -1;
3638 }
3639 return htab->plt_type == PLT_NEW;
3640 }
3641 \f
3642 /* Return the section that should be marked against GC for a given
3643 relocation. */
3644
3645 static asection *
3646 ppc_elf_gc_mark_hook (asection *sec,
3647 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3648 Elf_Internal_Rela *rel,
3649 struct elf_link_hash_entry *h,
3650 Elf_Internal_Sym *sym)
3651 {
3652 if (h != NULL)
3653 {
3654 switch (ELF32_R_TYPE (rel->r_info))
3655 {
3656 case R_PPC_GNU_VTINHERIT:
3657 case R_PPC_GNU_VTENTRY:
3658 break;
3659
3660 default:
3661 switch (h->root.type)
3662 {
3663 case bfd_link_hash_defined:
3664 case bfd_link_hash_defweak:
3665 return h->root.u.def.section;
3666
3667 case bfd_link_hash_common:
3668 return h->root.u.c.p->section;
3669
3670 default:
3671 break;
3672 }
3673 }
3674 }
3675 else
3676 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3677
3678 return NULL;
3679 }
3680
3681 /* Update the got, plt and dynamic reloc reference counts for the
3682 section being removed. */
3683
3684 static bfd_boolean
3685 ppc_elf_gc_sweep_hook (bfd *abfd,
3686 struct bfd_link_info *info,
3687 asection *sec,
3688 const Elf_Internal_Rela *relocs)
3689 {
3690 struct ppc_elf_link_hash_table *htab;
3691 Elf_Internal_Shdr *symtab_hdr;
3692 struct elf_link_hash_entry **sym_hashes;
3693 bfd_signed_vma *local_got_refcounts;
3694 const Elf_Internal_Rela *rel, *relend;
3695 asection *got2;
3696
3697 if ((sec->flags & SEC_ALLOC) == 0)
3698 return TRUE;
3699
3700 elf_section_data (sec)->local_dynrel = NULL;
3701
3702 htab = ppc_elf_hash_table (info);
3703 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3704 sym_hashes = elf_sym_hashes (abfd);
3705 local_got_refcounts = elf_local_got_refcounts (abfd);
3706 got2 = bfd_get_section_by_name (abfd, ".got2");
3707
3708 relend = relocs + sec->reloc_count;
3709 for (rel = relocs; rel < relend; rel++)
3710 {
3711 unsigned long r_symndx;
3712 enum elf_ppc_reloc_type r_type;
3713 struct elf_link_hash_entry *h = NULL;
3714
3715 r_symndx = ELF32_R_SYM (rel->r_info);
3716 if (r_symndx >= symtab_hdr->sh_info)
3717 {
3718 struct ppc_elf_dyn_relocs **pp, *p;
3719 struct ppc_elf_link_hash_entry *eh;
3720
3721 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3722 while (h->root.type == bfd_link_hash_indirect
3723 || h->root.type == bfd_link_hash_warning)
3724 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3725 eh = (struct ppc_elf_link_hash_entry *) h;
3726
3727 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3728 if (p->sec == sec)
3729 {
3730 /* Everything must go for SEC. */
3731 *pp = p->next;
3732 break;
3733 }
3734 }
3735
3736 r_type = ELF32_R_TYPE (rel->r_info);
3737 switch (r_type)
3738 {
3739 case R_PPC_GOT_TLSLD16:
3740 case R_PPC_GOT_TLSLD16_LO:
3741 case R_PPC_GOT_TLSLD16_HI:
3742 case R_PPC_GOT_TLSLD16_HA:
3743 htab->tlsld_got.refcount -= 1;
3744 /* Fall thru */
3745
3746 case R_PPC_GOT_TLSGD16:
3747 case R_PPC_GOT_TLSGD16_LO:
3748 case R_PPC_GOT_TLSGD16_HI:
3749 case R_PPC_GOT_TLSGD16_HA:
3750 case R_PPC_GOT_TPREL16:
3751 case R_PPC_GOT_TPREL16_LO:
3752 case R_PPC_GOT_TPREL16_HI:
3753 case R_PPC_GOT_TPREL16_HA:
3754 case R_PPC_GOT_DTPREL16:
3755 case R_PPC_GOT_DTPREL16_LO:
3756 case R_PPC_GOT_DTPREL16_HI:
3757 case R_PPC_GOT_DTPREL16_HA:
3758 case R_PPC_GOT16:
3759 case R_PPC_GOT16_LO:
3760 case R_PPC_GOT16_HI:
3761 case R_PPC_GOT16_HA:
3762 if (h != NULL)
3763 {
3764 if (h->got.refcount > 0)
3765 h->got.refcount--;
3766 }
3767 else if (local_got_refcounts != NULL)
3768 {
3769 if (local_got_refcounts[r_symndx] > 0)
3770 local_got_refcounts[r_symndx]--;
3771 }
3772 break;
3773
3774 case R_PPC_REL24:
3775 case R_PPC_REL14:
3776 case R_PPC_REL14_BRTAKEN:
3777 case R_PPC_REL14_BRNTAKEN:
3778 case R_PPC_REL32:
3779 if (h == NULL || h == htab->elf.hgot)
3780 break;
3781 /* Fall thru */
3782
3783 case R_PPC_ADDR32:
3784 case R_PPC_ADDR24:
3785 case R_PPC_ADDR16:
3786 case R_PPC_ADDR16_LO:
3787 case R_PPC_ADDR16_HI:
3788 case R_PPC_ADDR16_HA:
3789 case R_PPC_ADDR14:
3790 case R_PPC_ADDR14_BRTAKEN:
3791 case R_PPC_ADDR14_BRNTAKEN:
3792 case R_PPC_UADDR32:
3793 case R_PPC_UADDR16:
3794 if (info->shared)
3795 break;
3796
3797 case R_PPC_PLT32:
3798 case R_PPC_PLTREL24:
3799 case R_PPC_PLTREL32:
3800 case R_PPC_PLT16_LO:
3801 case R_PPC_PLT16_HI:
3802 case R_PPC_PLT16_HA:
3803 if (h != NULL)
3804 {
3805 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3806 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3807 if (ent->plt.refcount > 0)
3808 ent->plt.refcount -= 1;
3809 }
3810 break;
3811
3812 default:
3813 break;
3814 }
3815 }
3816 return TRUE;
3817 }
3818 \f
3819 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3820
3821 asection *
3822 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3823 {
3824 struct ppc_elf_link_hash_table *htab;
3825
3826 htab = ppc_elf_hash_table (info);
3827 if (htab->plt_type == PLT_NEW
3828 && htab->plt != NULL
3829 && htab->plt->output_section != NULL)
3830 {
3831 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3832 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3833 }
3834
3835 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3836 FALSE, FALSE, TRUE);
3837 return _bfd_elf_tls_setup (obfd, info);
3838 }
3839
3840 /* Run through all the TLS relocs looking for optimization
3841 opportunities. */
3842
3843 bfd_boolean
3844 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3845 struct bfd_link_info *info)
3846 {
3847 bfd *ibfd;
3848 asection *sec;
3849 struct ppc_elf_link_hash_table *htab;
3850
3851 if (info->relocatable || info->shared)
3852 return TRUE;
3853
3854 htab = ppc_elf_hash_table (info);
3855 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3856 {
3857 Elf_Internal_Sym *locsyms = NULL;
3858 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3859
3860 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3861 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3862 {
3863 Elf_Internal_Rela *relstart, *rel, *relend;
3864 int expecting_tls_get_addr;
3865
3866 /* Read the relocations. */
3867 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3868 info->keep_memory);
3869 if (relstart == NULL)
3870 return FALSE;
3871
3872 expecting_tls_get_addr = 0;
3873 relend = relstart + sec->reloc_count;
3874 for (rel = relstart; rel < relend; rel++)
3875 {
3876 enum elf_ppc_reloc_type r_type;
3877 unsigned long r_symndx;
3878 struct elf_link_hash_entry *h = NULL;
3879 char *tls_mask;
3880 char tls_set, tls_clear;
3881 bfd_boolean is_local;
3882
3883 r_symndx = ELF32_R_SYM (rel->r_info);
3884 if (r_symndx >= symtab_hdr->sh_info)
3885 {
3886 struct elf_link_hash_entry **sym_hashes;
3887
3888 sym_hashes = elf_sym_hashes (ibfd);
3889 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3890 while (h->root.type == bfd_link_hash_indirect
3891 || h->root.type == bfd_link_hash_warning)
3892 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3893 }
3894
3895 is_local = FALSE;
3896 if (h == NULL
3897 || !h->def_dynamic)
3898 is_local = TRUE;
3899
3900 r_type = ELF32_R_TYPE (rel->r_info);
3901 switch (r_type)
3902 {
3903 case R_PPC_GOT_TLSLD16:
3904 case R_PPC_GOT_TLSLD16_LO:
3905 case R_PPC_GOT_TLSLD16_HI:
3906 case R_PPC_GOT_TLSLD16_HA:
3907 /* These relocs should never be against a symbol
3908 defined in a shared lib. Leave them alone if
3909 that turns out to be the case. */
3910 expecting_tls_get_addr = 0;
3911 htab->tlsld_got.refcount -= 1;
3912 if (!is_local)
3913 continue;
3914
3915 /* LD -> LE */
3916 tls_set = 0;
3917 tls_clear = TLS_LD;
3918 expecting_tls_get_addr = 1;
3919 break;
3920
3921 case R_PPC_GOT_TLSGD16:
3922 case R_PPC_GOT_TLSGD16_LO:
3923 case R_PPC_GOT_TLSGD16_HI:
3924 case R_PPC_GOT_TLSGD16_HA:
3925 if (is_local)
3926 /* GD -> LE */
3927 tls_set = 0;
3928 else
3929 /* GD -> IE */
3930 tls_set = TLS_TLS | TLS_TPRELGD;
3931 tls_clear = TLS_GD;
3932 expecting_tls_get_addr = 1;
3933 break;
3934
3935 case R_PPC_GOT_TPREL16:
3936 case R_PPC_GOT_TPREL16_LO:
3937 case R_PPC_GOT_TPREL16_HI:
3938 case R_PPC_GOT_TPREL16_HA:
3939 expecting_tls_get_addr = 0;
3940 if (is_local)
3941 {
3942 /* IE -> LE */
3943 tls_set = 0;
3944 tls_clear = TLS_TPREL;
3945 break;
3946 }
3947 else
3948 continue;
3949
3950 case R_PPC_REL14:
3951 case R_PPC_REL14_BRTAKEN:
3952 case R_PPC_REL14_BRNTAKEN:
3953 case R_PPC_REL24:
3954 if (expecting_tls_get_addr
3955 && h != NULL
3956 && h == htab->tls_get_addr)
3957 {
3958 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3959 if (ent != NULL && ent->plt.refcount > 0)
3960 ent->plt.refcount -= 1;
3961 }
3962 expecting_tls_get_addr = 0;
3963 continue;
3964
3965 default:
3966 expecting_tls_get_addr = 0;
3967 continue;
3968 }
3969
3970 if (h != NULL)
3971 {
3972 if (tls_set == 0)
3973 {
3974 /* We managed to get rid of a got entry. */
3975 if (h->got.refcount > 0)
3976 h->got.refcount -= 1;
3977 }
3978 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3979 }
3980 else
3981 {
3982 Elf_Internal_Sym *sym;
3983 bfd_signed_vma *lgot_refs;
3984 char *lgot_masks;
3985
3986 if (locsyms == NULL)
3987 {
3988 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3989 if (locsyms == NULL)
3990 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3991 symtab_hdr->sh_info,
3992 0, NULL, NULL, NULL);
3993 if (locsyms == NULL)
3994 {
3995 if (elf_section_data (sec)->relocs != relstart)
3996 free (relstart);
3997 return FALSE;
3998 }
3999 }
4000 sym = locsyms + r_symndx;
4001 lgot_refs = elf_local_got_refcounts (ibfd);
4002 if (lgot_refs == NULL)
4003 abort ();
4004 if (tls_set == 0)
4005 {
4006 /* We managed to get rid of a got entry. */
4007 if (lgot_refs[r_symndx] > 0)
4008 lgot_refs[r_symndx] -= 1;
4009 }
4010 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4011 tls_mask = &lgot_masks[r_symndx];
4012 }
4013
4014 *tls_mask |= tls_set;
4015 *tls_mask &= ~tls_clear;
4016 }
4017
4018 if (elf_section_data (sec)->relocs != relstart)
4019 free (relstart);
4020 }
4021
4022 if (locsyms != NULL
4023 && (symtab_hdr->contents != (unsigned char *) locsyms))
4024 {
4025 if (!info->keep_memory)
4026 free (locsyms);
4027 else
4028 symtab_hdr->contents = (unsigned char *) locsyms;
4029 }
4030 }
4031 return TRUE;
4032 }
4033 \f
4034 /* Adjust a symbol defined by a dynamic object and referenced by a
4035 regular object. The current definition is in some section of the
4036 dynamic object, but we're not including those sections. We have to
4037 change the definition to something the rest of the link can
4038 understand. */
4039
4040 static bfd_boolean
4041 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4042 struct elf_link_hash_entry *h)
4043 {
4044 struct ppc_elf_link_hash_table *htab;
4045 asection *s;
4046 unsigned int power_of_two;
4047
4048 #ifdef DEBUG
4049 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4050 h->root.root.string);
4051 #endif
4052
4053 /* Make sure we know what is going on here. */
4054 htab = ppc_elf_hash_table (info);
4055 BFD_ASSERT (htab->elf.dynobj != NULL
4056 && (h->needs_plt
4057 || h->u.weakdef != NULL
4058 || (h->def_dynamic
4059 && h->ref_regular
4060 && !h->def_regular)));
4061
4062 /* Deal with function syms. */
4063 if (h->type == STT_FUNC
4064 || h->needs_plt)
4065 {
4066 /* Clear procedure linkage table information for any symbol that
4067 won't need a .plt entry. */
4068 struct plt_entry *ent;
4069 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4070 if (ent->plt.refcount > 0)
4071 break;
4072 if (ent == NULL
4073 || SYMBOL_CALLS_LOCAL (info, h)
4074 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4075 && h->root.type == bfd_link_hash_undefweak))
4076 {
4077 /* A PLT entry is not required/allowed when:
4078
4079 1. We are not using ld.so; because then the PLT entry
4080 can't be set up, so we can't use one. In this case,
4081 ppc_elf_adjust_dynamic_symbol won't even be called.
4082
4083 2. GC has rendered the entry unused.
4084
4085 3. We know for certain that a call to this symbol
4086 will go to this object, or will remain undefined. */
4087 h->plt.plist = NULL;
4088 h->needs_plt = 0;
4089 }
4090 return TRUE;
4091 }
4092 else
4093 h->plt.plist = NULL;
4094
4095 /* If this is a weak symbol, and there is a real definition, the
4096 processor independent code will have arranged for us to see the
4097 real definition first, and we can just use the same value. */
4098 if (h->u.weakdef != NULL)
4099 {
4100 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4101 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4102 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4103 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4104 if (ELIMINATE_COPY_RELOCS)
4105 h->non_got_ref = h->u.weakdef->non_got_ref;
4106 return TRUE;
4107 }
4108
4109 /* This is a reference to a symbol defined by a dynamic object which
4110 is not a function. */
4111
4112 /* If we are creating a shared library, we must presume that the
4113 only references to the symbol are via the global offset table.
4114 For such cases we need not do anything here; the relocations will
4115 be handled correctly by relocate_section. */
4116 if (info->shared)
4117 return TRUE;
4118
4119 /* If there are no references to this symbol that do not use the
4120 GOT, we don't need to generate a copy reloc. */
4121 if (!h->non_got_ref)
4122 return TRUE;
4123
4124 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4125 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4126 do this if there are any small data relocations. */
4127 if (ELIMINATE_COPY_RELOCS
4128 && !ppc_elf_hash_entry (h)->has_sda_refs)
4129 {
4130 struct ppc_elf_dyn_relocs *p;
4131 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4132 {
4133 s = p->sec->output_section;
4134 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4135 break;
4136 }
4137
4138 if (p == NULL)
4139 {
4140 h->non_got_ref = 0;
4141 return TRUE;
4142 }
4143 }
4144
4145 if (h->size == 0)
4146 {
4147 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4148 h->root.root.string);
4149 return TRUE;
4150 }
4151
4152 /* We must allocate the symbol in our .dynbss section, which will
4153 become part of the .bss section of the executable. There will be
4154 an entry for this symbol in the .dynsym section. The dynamic
4155 object will contain position independent code, so all references
4156 from the dynamic object to this symbol will go through the global
4157 offset table. The dynamic linker will use the .dynsym entry to
4158 determine the address it must put in the global offset table, so
4159 both the dynamic object and the regular object will refer to the
4160 same memory location for the variable.
4161
4162 Of course, if the symbol is referenced using SDAREL relocs, we
4163 must instead allocate it in .sbss. */
4164
4165 if (ppc_elf_hash_entry (h)->has_sda_refs)
4166 s = htab->dynsbss;
4167 else
4168 s = htab->dynbss;
4169 BFD_ASSERT (s != NULL);
4170
4171 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4172 copy the initial value out of the dynamic object and into the
4173 runtime process image. We need to remember the offset into the
4174 .rela.bss section we are going to use. */
4175 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4176 {
4177 asection *srel;
4178
4179 if (ppc_elf_hash_entry (h)->has_sda_refs)
4180 srel = htab->relsbss;
4181 else
4182 srel = htab->relbss;
4183 BFD_ASSERT (srel != NULL);
4184 srel->size += sizeof (Elf32_External_Rela);
4185 h->needs_copy = 1;
4186 }
4187
4188 /* We need to figure out the alignment required for this symbol. I
4189 have no idea how ELF linkers handle this. */
4190 power_of_two = bfd_log2 (h->size);
4191 if (power_of_two > 4)
4192 power_of_two = 4;
4193
4194 /* Apply the required alignment. */
4195 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4196 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4197 {
4198 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4199 return FALSE;
4200 }
4201
4202 /* Define the symbol as being at this point in the section. */
4203 h->root.u.def.section = s;
4204 h->root.u.def.value = s->size;
4205
4206 /* Increment the section size to make room for the symbol. */
4207 s->size += h->size;
4208
4209 return TRUE;
4210 }
4211 \f
4212 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4213 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4214 specifying the addend on the plt relocation. For -fpic code, the sym
4215 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4216 xxxxxxxx.got2.plt_pic32.<callee>. */
4217
4218 static bfd_boolean
4219 add_stub_sym (struct plt_entry *ent,
4220 struct elf_link_hash_entry *h,
4221 struct bfd_link_info *info)
4222 {
4223 struct elf_link_hash_entry *sh;
4224 size_t len1, len2, len3;
4225 char *name;
4226 const char *stub;
4227 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4228
4229 if (info->shared || info->pie)
4230 stub = ".plt_pic32.";
4231 else
4232 stub = ".plt_call32.";
4233
4234 len1 = strlen (h->root.root.string);
4235 len2 = strlen (stub);
4236 len3 = 0;
4237 if (ent->sec)
4238 len3 = strlen (ent->sec->name);
4239 name = bfd_malloc (len1 + len2 + len3 + 9);
4240 if (name == NULL)
4241 return FALSE;
4242 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4243 if (ent->sec)
4244 memcpy (name + 8, ent->sec->name, len3);
4245 memcpy (name + 8 + len3, stub, len2);
4246 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4247 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4248 if (sh == NULL)
4249 return FALSE;
4250 if (sh->root.type == bfd_link_hash_new)
4251 {
4252 sh->root.type = bfd_link_hash_defined;
4253 sh->root.u.def.section = htab->glink;
4254 sh->root.u.def.value = ent->glink_offset;
4255 sh->ref_regular = 1;
4256 sh->def_regular = 1;
4257 sh->ref_regular_nonweak = 1;
4258 sh->forced_local = 1;
4259 sh->non_elf = 0;
4260 }
4261 return TRUE;
4262 }
4263
4264 /* Allocate NEED contiguous space in .got, and return the offset.
4265 Handles allocation of the got header when crossing 32k. */
4266
4267 static bfd_vma
4268 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4269 {
4270 bfd_vma where;
4271 unsigned int max_before_header;
4272
4273 if (htab->plt_type == PLT_VXWORKS)
4274 {
4275 where = htab->got->size;
4276 htab->got->size += need;
4277 }
4278 else
4279 {
4280 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4281 if (need <= htab->got_gap)
4282 {
4283 where = max_before_header - htab->got_gap;
4284 htab->got_gap -= need;
4285 }
4286 else
4287 {
4288 if (htab->got->size + need > max_before_header
4289 && htab->got->size <= max_before_header)
4290 {
4291 htab->got_gap = max_before_header - htab->got->size;
4292 htab->got->size = max_before_header + htab->got_header_size;
4293 }
4294 where = htab->got->size;
4295 htab->got->size += need;
4296 }
4297 }
4298 return where;
4299 }
4300
4301 /* Allocate space in associated reloc sections for dynamic relocs. */
4302
4303 static bfd_boolean
4304 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4305 {
4306 struct bfd_link_info *info = inf;
4307 struct ppc_elf_link_hash_entry *eh;
4308 struct ppc_elf_link_hash_table *htab;
4309 struct ppc_elf_dyn_relocs *p;
4310
4311 if (h->root.type == bfd_link_hash_indirect)
4312 return TRUE;
4313
4314 if (h->root.type == bfd_link_hash_warning)
4315 /* When warning symbols are created, they **replace** the "real"
4316 entry in the hash table, thus we never get to see the real
4317 symbol in a hash traversal. So look at it now. */
4318 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4319
4320 htab = ppc_elf_hash_table (info);
4321 if (htab->elf.dynamic_sections_created)
4322 {
4323 struct plt_entry *ent;
4324 bfd_boolean doneone = FALSE;
4325 bfd_vma plt_offset = 0, glink_offset = 0;
4326
4327 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4328 if (ent->plt.refcount > 0)
4329 {
4330 /* Make sure this symbol is output as a dynamic symbol. */
4331 if (h->dynindx == -1
4332 && !h->forced_local)
4333 {
4334 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4335 return FALSE;
4336 }
4337
4338 if (info->shared
4339 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4340 {
4341 asection *s = htab->plt;
4342
4343 if (htab->plt_type == PLT_NEW)
4344 {
4345 if (!doneone)
4346 {
4347 plt_offset = s->size;
4348 s->size += 4;
4349 }
4350 ent->plt.offset = plt_offset;
4351
4352 s = htab->glink;
4353 if (!doneone || info->shared || info->pie)
4354 {
4355 glink_offset = s->size;
4356 s->size += GLINK_ENTRY_SIZE;
4357 }
4358 if (!doneone
4359 && !info->shared
4360 && !h->def_regular)
4361 {
4362 h->root.u.def.section = s;
4363 h->root.u.def.value = glink_offset;
4364 }
4365 ent->glink_offset = glink_offset;
4366
4367 if (htab->emit_stub_syms
4368 && !add_stub_sym (ent, h, info))
4369 return FALSE;
4370 }
4371 else
4372 {
4373 if (!doneone)
4374 {
4375 /* If this is the first .plt entry, make room
4376 for the special first entry. */
4377 if (s->size == 0)
4378 s->size += htab->plt_initial_entry_size;
4379
4380 /* The PowerPC PLT is actually composed of two
4381 parts, the first part is 2 words (for a load
4382 and a jump), and then there is a remaining
4383 word available at the end. */
4384 plt_offset = (htab->plt_initial_entry_size
4385 + (htab->plt_slot_size
4386 * ((s->size
4387 - htab->plt_initial_entry_size)
4388 / htab->plt_entry_size)));
4389
4390 /* If this symbol is not defined in a regular
4391 file, and we are not generating a shared
4392 library, then set the symbol to this location
4393 in the .plt. This is required to make
4394 function pointers compare as equal between
4395 the normal executable and the shared library. */
4396 if (! info->shared
4397 && !h->def_regular)
4398 {
4399 h->root.u.def.section = s;
4400 h->root.u.def.value = plt_offset;
4401 }
4402
4403 /* Make room for this entry. */
4404 s->size += htab->plt_entry_size;
4405 /* After the 8192nd entry, room for two entries
4406 is allocated. */
4407 if (htab->plt_type == PLT_OLD
4408 && (s->size - htab->plt_initial_entry_size)
4409 / htab->plt_entry_size
4410 > PLT_NUM_SINGLE_ENTRIES)
4411 s->size += htab->plt_entry_size;
4412 }
4413 ent->plt.offset = plt_offset;
4414 }
4415
4416 /* We also need to make an entry in the .rela.plt section. */
4417 if (!doneone)
4418 {
4419 htab->relplt->size += sizeof (Elf32_External_Rela);
4420
4421 if (htab->plt_type == PLT_VXWORKS)
4422 {
4423 /* Allocate space for the unloaded relocations. */
4424 if (!info->shared)
4425 {
4426 if (ent->plt.offset
4427 == (bfd_vma) htab->plt_initial_entry_size)
4428 {
4429 htab->srelplt2->size
4430 += sizeof (Elf32_External_Rela)
4431 * VXWORKS_PLTRESOLVE_RELOCS;
4432 }
4433
4434 htab->srelplt2->size
4435 += sizeof (Elf32_External_Rela)
4436 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4437 }
4438
4439 /* Every PLT entry has an associated GOT entry in
4440 .got.plt. */
4441 htab->sgotplt->size += 4;
4442 }
4443 doneone = TRUE;
4444 }
4445 }
4446 else
4447 ent->plt.offset = (bfd_vma) -1;
4448
4449 if (!doneone)
4450 {
4451 h->plt.plist = NULL;
4452 h->needs_plt = 0;
4453 }
4454 }
4455 }
4456 else
4457 {
4458 h->plt.plist = NULL;
4459 h->needs_plt = 0;
4460 }
4461
4462 eh = (struct ppc_elf_link_hash_entry *) h;
4463 if (eh->elf.got.refcount > 0)
4464 {
4465 /* Make sure this symbol is output as a dynamic symbol. */
4466 if (eh->elf.dynindx == -1
4467 && !eh->elf.forced_local)
4468 {
4469 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4470 return FALSE;
4471 }
4472
4473 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4474 && !eh->elf.def_dynamic)
4475 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4476 eh->elf.got.offset = (bfd_vma) -1;
4477 else
4478 {
4479 bfd_boolean dyn;
4480 unsigned int need = 0;
4481 if ((eh->tls_mask & TLS_TLS) != 0)
4482 {
4483 if ((eh->tls_mask & TLS_LD) != 0)
4484 need += 8;
4485 if ((eh->tls_mask & TLS_GD) != 0)
4486 need += 8;
4487 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4488 need += 4;
4489 if ((eh->tls_mask & TLS_DTPREL) != 0)
4490 need += 4;
4491 }
4492 else
4493 need += 4;
4494 eh->elf.got.offset = allocate_got (htab, need);
4495 dyn = htab->elf.dynamic_sections_created;
4496 if ((info->shared
4497 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4498 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4499 || eh->elf.root.type != bfd_link_hash_undefweak))
4500 {
4501 /* All the entries we allocated need relocs.
4502 Except LD only needs one. */
4503 if ((eh->tls_mask & TLS_LD) != 0)
4504 need -= 4;
4505 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4506 }
4507 }
4508 }
4509 else
4510 eh->elf.got.offset = (bfd_vma) -1;
4511
4512 if (eh->dyn_relocs == NULL)
4513 return TRUE;
4514
4515 /* In the shared -Bsymbolic case, discard space allocated for
4516 dynamic pc-relative relocs against symbols which turn out to be
4517 defined in regular objects. For the normal shared case, discard
4518 space for relocs that have become local due to symbol visibility
4519 changes. */
4520
4521 if (info->shared)
4522 {
4523 /* Relocs that use pc_count are those that appear on a call insn,
4524 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4525 generated via assembly. We want calls to protected symbols to
4526 resolve directly to the function rather than going via the plt.
4527 If people want function pointer comparisons to work as expected
4528 then they should avoid writing weird assembly. */
4529 if (SYMBOL_CALLS_LOCAL (info, h))
4530 {
4531 struct ppc_elf_dyn_relocs **pp;
4532
4533 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4534 {
4535 p->count -= p->pc_count;
4536 p->pc_count = 0;
4537 if (p->count == 0)
4538 *pp = p->next;
4539 else
4540 pp = &p->next;
4541 }
4542 }
4543
4544 /* Also discard relocs on undefined weak syms with non-default
4545 visibility. */
4546 if (eh->dyn_relocs != NULL
4547 && h->root.type == bfd_link_hash_undefweak)
4548 {
4549 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4550 eh->dyn_relocs = NULL;
4551
4552 /* Make sure undefined weak symbols are output as a dynamic
4553 symbol in PIEs. */
4554 else if (h->dynindx == -1
4555 && !h->forced_local)
4556 {
4557 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4558 return FALSE;
4559 }
4560 }
4561 }
4562 else if (ELIMINATE_COPY_RELOCS)
4563 {
4564 /* For the non-shared case, discard space for relocs against
4565 symbols which turn out to need copy relocs or are not
4566 dynamic. */
4567
4568 if (!h->non_got_ref
4569 && h->def_dynamic
4570 && !h->def_regular)
4571 {
4572 /* Make sure this symbol is output as a dynamic symbol.
4573 Undefined weak syms won't yet be marked as dynamic. */
4574 if (h->dynindx == -1
4575 && !h->forced_local)
4576 {
4577 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4578 return FALSE;
4579 }
4580
4581 /* If that succeeded, we know we'll be keeping all the
4582 relocs. */
4583 if (h->dynindx != -1)
4584 goto keep;
4585 }
4586
4587 eh->dyn_relocs = NULL;
4588
4589 keep: ;
4590 }
4591
4592 /* Finally, allocate space. */
4593 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4594 {
4595 asection *sreloc = elf_section_data (p->sec)->sreloc;
4596 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4597 }
4598
4599 return TRUE;
4600 }
4601
4602 /* Find any dynamic relocs that apply to read-only sections. */
4603
4604 static bfd_boolean
4605 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4606 {
4607 struct ppc_elf_dyn_relocs *p;
4608
4609 if (h->root.type == bfd_link_hash_indirect)
4610 return TRUE;
4611
4612 if (h->root.type == bfd_link_hash_warning)
4613 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4614
4615 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4616 {
4617 asection *s = p->sec->output_section;
4618
4619 if (s != NULL
4620 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4621 == (SEC_READONLY | SEC_ALLOC)))
4622 {
4623 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4624
4625 /* Not an error, just cut short the traversal. */
4626 return FALSE;
4627 }
4628 }
4629 return TRUE;
4630 }
4631
4632 /* Set the sizes of the dynamic sections. */
4633
4634 static bfd_boolean
4635 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4636 struct bfd_link_info *info)
4637 {
4638 struct ppc_elf_link_hash_table *htab;
4639 asection *s;
4640 bfd_boolean relocs;
4641 bfd *ibfd;
4642
4643 #ifdef DEBUG
4644 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4645 #endif
4646
4647 htab = ppc_elf_hash_table (info);
4648 BFD_ASSERT (htab->elf.dynobj != NULL);
4649
4650 if (elf_hash_table (info)->dynamic_sections_created)
4651 {
4652 /* Set the contents of the .interp section to the interpreter. */
4653 if (info->executable)
4654 {
4655 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4656 BFD_ASSERT (s != NULL);
4657 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4658 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4659 }
4660 }
4661
4662 if (htab->plt_type == PLT_OLD)
4663 htab->got_header_size = 16;
4664 else if (htab->plt_type == PLT_NEW)
4665 htab->got_header_size = 12;
4666
4667 /* Set up .got offsets for local syms, and space for local dynamic
4668 relocs. */
4669 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4670 {
4671 bfd_signed_vma *local_got;
4672 bfd_signed_vma *end_local_got;
4673 char *lgot_masks;
4674 bfd_size_type locsymcount;
4675 Elf_Internal_Shdr *symtab_hdr;
4676
4677 if (!is_ppc_elf_target (ibfd->xvec))
4678 continue;
4679
4680 for (s = ibfd->sections; s != NULL; s = s->next)
4681 {
4682 struct ppc_elf_dyn_relocs *p;
4683
4684 for (p = ((struct ppc_elf_dyn_relocs *)
4685 elf_section_data (s)->local_dynrel);
4686 p != NULL;
4687 p = p->next)
4688 {
4689 if (!bfd_is_abs_section (p->sec)
4690 && bfd_is_abs_section (p->sec->output_section))
4691 {
4692 /* Input section has been discarded, either because
4693 it is a copy of a linkonce section or due to
4694 linker script /DISCARD/, so we'll be discarding
4695 the relocs too. */
4696 }
4697 else if (p->count != 0)
4698 {
4699 elf_section_data (p->sec)->sreloc->size
4700 += p->count * sizeof (Elf32_External_Rela);
4701 if ((p->sec->output_section->flags
4702 & (SEC_READONLY | SEC_ALLOC))
4703 == (SEC_READONLY | SEC_ALLOC))
4704 info->flags |= DF_TEXTREL;
4705 }
4706 }
4707 }
4708
4709 local_got = elf_local_got_refcounts (ibfd);
4710 if (!local_got)
4711 continue;
4712
4713 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4714 locsymcount = symtab_hdr->sh_info;
4715 end_local_got = local_got + locsymcount;
4716 lgot_masks = (char *) end_local_got;
4717 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4718 if (*local_got > 0)
4719 {
4720 if (*lgot_masks == (TLS_TLS | TLS_LD))
4721 {
4722 /* If just an LD reloc, we'll just use
4723 htab->tlsld_got.offset. */
4724 htab->tlsld_got.refcount += 1;
4725 *local_got = (bfd_vma) -1;
4726 }
4727 else
4728 {
4729 unsigned int need = 0;
4730 if ((*lgot_masks & TLS_TLS) != 0)
4731 {
4732 if ((*lgot_masks & TLS_GD) != 0)
4733 need += 8;
4734 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4735 need += 4;
4736 if ((*lgot_masks & TLS_DTPREL) != 0)
4737 need += 4;
4738 }
4739 else
4740 need += 4;
4741 *local_got = allocate_got (htab, need);
4742 if (info->shared)
4743 htab->relgot->size += (need
4744 * (sizeof (Elf32_External_Rela) / 4));
4745 }
4746 }
4747 else
4748 *local_got = (bfd_vma) -1;
4749 }
4750
4751 if (htab->tlsld_got.refcount > 0)
4752 {
4753 htab->tlsld_got.offset = allocate_got (htab, 8);
4754 if (info->shared)
4755 htab->relgot->size += sizeof (Elf32_External_Rela);
4756 }
4757 else
4758 htab->tlsld_got.offset = (bfd_vma) -1;
4759
4760 /* Allocate space for global sym dynamic relocs. */
4761 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4762
4763 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4764 {
4765 unsigned int g_o_t = 32768;
4766
4767 /* If we haven't allocated the header, do so now. When we get here,
4768 for old plt/got the got size will be 0 to 32764 (not allocated),
4769 or 32780 to 65536 (header allocated). For new plt/got, the
4770 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4771 if (htab->got->size <= 32768)
4772 {
4773 g_o_t = htab->got->size;
4774 if (htab->plt_type == PLT_OLD)
4775 g_o_t += 4;
4776 htab->got->size += htab->got_header_size;
4777 }
4778
4779 htab->elf.hgot->root.u.def.value = g_o_t;
4780 }
4781
4782 if (htab->glink != NULL && htab->glink->size != 0)
4783 {
4784 htab->glink_pltresolve = htab->glink->size;
4785 /* Space for the branch table. */
4786 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4787 /* Pad out to align the start of PLTresolve. */
4788 htab->glink->size += -htab->glink->size & 15;
4789 htab->glink->size += GLINK_PLTRESOLVE;
4790
4791 if (htab->emit_stub_syms)
4792 {
4793 struct elf_link_hash_entry *sh;
4794 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4795 TRUE, FALSE, FALSE);
4796 if (sh == NULL)
4797 return FALSE;
4798 if (sh->root.type == bfd_link_hash_new)
4799 {
4800 sh->root.type = bfd_link_hash_defined;
4801 sh->root.u.def.section = htab->glink;
4802 sh->root.u.def.value = htab->glink_pltresolve;
4803 sh->ref_regular = 1;
4804 sh->def_regular = 1;
4805 sh->ref_regular_nonweak = 1;
4806 sh->forced_local = 1;
4807 sh->non_elf = 0;
4808 }
4809 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4810 TRUE, FALSE, FALSE);
4811 if (sh == NULL)
4812 return FALSE;
4813 if (sh->root.type == bfd_link_hash_new)
4814 {
4815 sh->root.type = bfd_link_hash_defined;
4816 sh->root.u.def.section = htab->glink;
4817 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4818 sh->ref_regular = 1;
4819 sh->def_regular = 1;
4820 sh->ref_regular_nonweak = 1;
4821 sh->forced_local = 1;
4822 sh->non_elf = 0;
4823 }
4824 }
4825 }
4826
4827 /* We've now determined the sizes of the various dynamic sections.
4828 Allocate memory for them. */
4829 relocs = FALSE;
4830 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4831 {
4832 bfd_boolean strip_section = TRUE;
4833
4834 if ((s->flags & SEC_LINKER_CREATED) == 0)
4835 continue;
4836
4837 if (s == htab->plt
4838 || s == htab->glink
4839 || s == htab->got
4840 || s == htab->sgotplt
4841 || s == htab->sbss
4842 || s == htab->dynbss
4843 || s == htab->dynsbss)
4844 {
4845 /* We'd like to strip these sections if they aren't needed, but if
4846 we've exported dynamic symbols from them we must leave them.
4847 It's too late to tell BFD to get rid of the symbols. */
4848 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4849 strip_section = FALSE;
4850 /* Strip this section if we don't need it; see the
4851 comment below. */
4852 }
4853 else if (s == htab->sdata[0].section
4854 || s == htab->sdata[1].section)
4855 {
4856 /* Strip these too. */
4857 }
4858 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4859 {
4860 if (s->size != 0)
4861 {
4862 /* Remember whether there are any relocation sections. */
4863 relocs = TRUE;
4864
4865 /* We use the reloc_count field as a counter if we need
4866 to copy relocs into the output file. */
4867 s->reloc_count = 0;
4868 }
4869 }
4870 else
4871 {
4872 /* It's not one of our sections, so don't allocate space. */
4873 continue;
4874 }
4875
4876 if (s->size == 0 && strip_section)
4877 {
4878 /* If we don't need this section, strip it from the
4879 output file. This is mostly to handle .rela.bss and
4880 .rela.plt. We must create both sections in
4881 create_dynamic_sections, because they must be created
4882 before the linker maps input sections to output
4883 sections. The linker does that before
4884 adjust_dynamic_symbol is called, and it is that
4885 function which decides whether anything needs to go
4886 into these sections. */
4887 s->flags |= SEC_EXCLUDE;
4888 continue;
4889 }
4890
4891 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4892 continue;
4893
4894 /* Allocate memory for the section contents. */
4895 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4896 if (s->contents == NULL)
4897 return FALSE;
4898 }
4899
4900 if (htab->elf.dynamic_sections_created)
4901 {
4902 /* Add some entries to the .dynamic section. We fill in the
4903 values later, in ppc_elf_finish_dynamic_sections, but we
4904 must add the entries now so that we get the correct size for
4905 the .dynamic section. The DT_DEBUG entry is filled in by the
4906 dynamic linker and used by the debugger. */
4907 #define add_dynamic_entry(TAG, VAL) \
4908 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4909
4910 if (info->executable)
4911 {
4912 if (!add_dynamic_entry (DT_DEBUG, 0))
4913 return FALSE;
4914 }
4915
4916 if (htab->plt != NULL && htab->plt->size != 0)
4917 {
4918 if (!add_dynamic_entry (DT_PLTGOT, 0)
4919 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4920 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4921 || !add_dynamic_entry (DT_JMPREL, 0))
4922 return FALSE;
4923 }
4924
4925 if (htab->glink != NULL && htab->glink->size != 0)
4926 {
4927 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4928 return FALSE;
4929 }
4930
4931 if (relocs)
4932 {
4933 if (!add_dynamic_entry (DT_RELA, 0)
4934 || !add_dynamic_entry (DT_RELASZ, 0)
4935 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4936 return FALSE;
4937 }
4938
4939 /* If any dynamic relocs apply to a read-only section, then we
4940 need a DT_TEXTREL entry. */
4941 if ((info->flags & DF_TEXTREL) == 0)
4942 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4943 info);
4944
4945 if ((info->flags & DF_TEXTREL) != 0)
4946 {
4947 if (!add_dynamic_entry (DT_TEXTREL, 0))
4948 return FALSE;
4949 }
4950 }
4951 #undef add_dynamic_entry
4952
4953 return TRUE;
4954 }
4955 \f
4956 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4957
4958 static const int shared_stub_entry[] =
4959 {
4960 0x7c0802a6, /* mflr 0 */
4961 0x429f0005, /* bcl 20, 31, .Lxxx */
4962 0x7d6802a6, /* mflr 11 */
4963 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4964 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4965 0x7c0803a6, /* mtlr 0 */
4966 0x7d6903a6, /* mtctr 11 */
4967 0x4e800420, /* bctr */
4968 };
4969
4970 static const int stub_entry[] =
4971 {
4972 0x3d600000, /* lis 11,xxx@ha */
4973 0x396b0000, /* addi 11,11,xxx@l */
4974 0x7d6903a6, /* mtctr 11 */
4975 0x4e800420, /* bctr */
4976 };
4977
4978 static bfd_boolean
4979 ppc_elf_relax_section (bfd *abfd,
4980 asection *isec,
4981 struct bfd_link_info *link_info,
4982 bfd_boolean *again)
4983 {
4984 struct one_fixup
4985 {
4986 struct one_fixup *next;
4987 asection *tsec;
4988 bfd_vma toff;
4989 bfd_vma trampoff;
4990 };
4991
4992 Elf_Internal_Shdr *symtab_hdr;
4993 bfd_byte *contents = NULL;
4994 Elf_Internal_Sym *isymbuf = NULL;
4995 Elf_Internal_Rela *internal_relocs = NULL;
4996 Elf_Internal_Rela *irel, *irelend;
4997 struct one_fixup *fixups = NULL;
4998 bfd_boolean changed;
4999 struct ppc_elf_link_hash_table *htab;
5000 bfd_size_type trampoff;
5001 asection *got2;
5002
5003 *again = FALSE;
5004
5005 /* Nothing to do if there are no relocations, and no need to do
5006 anything with non-alloc sections. */
5007 if ((isec->flags & SEC_ALLOC) == 0
5008 || (isec->flags & SEC_RELOC) == 0
5009 || isec->reloc_count == 0)
5010 return TRUE;
5011
5012 trampoff = (isec->size + 3) & (bfd_vma) -4;
5013 /* Space for a branch around any trampolines. */
5014 trampoff += 4;
5015
5016 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5017
5018 /* Get a copy of the native relocations. */
5019 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5020 link_info->keep_memory);
5021 if (internal_relocs == NULL)
5022 goto error_return;
5023
5024 htab = ppc_elf_hash_table (link_info);
5025 got2 = bfd_get_section_by_name (abfd, ".got2");
5026
5027 irelend = internal_relocs + isec->reloc_count;
5028 for (irel = internal_relocs; irel < irelend; irel++)
5029 {
5030 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5031 bfd_vma symaddr, reladdr, toff, roff;
5032 asection *tsec;
5033 struct one_fixup *f;
5034 size_t insn_offset = 0;
5035 bfd_vma max_branch_offset, val;
5036 bfd_byte *hit_addr;
5037 unsigned long t0;
5038 unsigned char sym_type;
5039
5040 switch (r_type)
5041 {
5042 case R_PPC_REL24:
5043 case R_PPC_LOCAL24PC:
5044 case R_PPC_PLTREL24:
5045 max_branch_offset = 1 << 25;
5046 break;
5047
5048 case R_PPC_REL14:
5049 case R_PPC_REL14_BRTAKEN:
5050 case R_PPC_REL14_BRNTAKEN:
5051 max_branch_offset = 1 << 15;
5052 break;
5053
5054 default:
5055 continue;
5056 }
5057
5058 /* Get the value of the symbol referred to by the reloc. */
5059 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5060 {
5061 /* A local symbol. */
5062 Elf_Internal_Sym *isym;
5063
5064 /* Read this BFD's local symbols. */
5065 if (isymbuf == NULL)
5066 {
5067 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5068 if (isymbuf == NULL)
5069 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5070 symtab_hdr->sh_info, 0,
5071 NULL, NULL, NULL);
5072 if (isymbuf == 0)
5073 goto error_return;
5074 }
5075 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5076 if (isym->st_shndx == SHN_UNDEF)
5077 continue; /* We can't do anything with undefined symbols. */
5078 else if (isym->st_shndx == SHN_ABS)
5079 tsec = bfd_abs_section_ptr;
5080 else if (isym->st_shndx == SHN_COMMON)
5081 tsec = bfd_com_section_ptr;
5082 else
5083 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5084
5085 toff = isym->st_value;
5086 sym_type = ELF_ST_TYPE (isym->st_info);
5087 }
5088 else
5089 {
5090 /* Global symbol handling. */
5091 unsigned long indx;
5092 struct elf_link_hash_entry *h;
5093
5094 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5095 h = elf_sym_hashes (abfd)[indx];
5096
5097 while (h->root.type == bfd_link_hash_indirect
5098 || h->root.type == bfd_link_hash_warning)
5099 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5100
5101 tsec = NULL;
5102 toff = 0;
5103 if (r_type == R_PPC_PLTREL24
5104 && htab->plt != NULL)
5105 {
5106 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5107
5108 if (ent != NULL)
5109 {
5110 if (htab->plt_type == PLT_NEW)
5111 {
5112 tsec = htab->glink;
5113 toff = ent->glink_offset;
5114 }
5115 else
5116 {
5117 tsec = htab->plt;
5118 toff = ent->plt.offset;
5119 }
5120 }
5121 }
5122 if (tsec != NULL)
5123 ;
5124 else if (h->root.type == bfd_link_hash_defined
5125 || h->root.type == bfd_link_hash_defweak)
5126 {
5127 tsec = h->root.u.def.section;
5128 toff = h->root.u.def.value;
5129 }
5130 else
5131 continue;
5132
5133 sym_type = h->type;
5134 }
5135
5136 /* If the branch and target are in the same section, you have
5137 no hope of adding stubs. We'll error out later should the
5138 branch overflow. */
5139 if (tsec == isec)
5140 continue;
5141
5142 /* There probably isn't any reason to handle symbols in
5143 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5144 attribute for a code section, and we are only looking at
5145 branches. However, implement it correctly here as a
5146 reference for other target relax_section functions. */
5147 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5148 {
5149 /* At this stage in linking, no SEC_MERGE symbol has been
5150 adjusted, so all references to such symbols need to be
5151 passed through _bfd_merged_section_offset. (Later, in
5152 relocate_section, all SEC_MERGE symbols *except* for
5153 section symbols have been adjusted.)
5154
5155 gas may reduce relocations against symbols in SEC_MERGE
5156 sections to a relocation against the section symbol when
5157 the original addend was zero. When the reloc is against
5158 a section symbol we should include the addend in the
5159 offset passed to _bfd_merged_section_offset, since the
5160 location of interest is the original symbol. On the
5161 other hand, an access to "sym+addend" where "sym" is not
5162 a section symbol should not include the addend; Such an
5163 access is presumed to be an offset from "sym"; The
5164 location of interest is just "sym". */
5165 if (sym_type == STT_SECTION)
5166 toff += irel->r_addend;
5167
5168 toff = _bfd_merged_section_offset (abfd, &tsec,
5169 elf_section_data (tsec)->sec_info,
5170 toff);
5171
5172 if (sym_type != STT_SECTION)
5173 toff += irel->r_addend;
5174 }
5175 /* PLTREL24 addends are special. */
5176 else if (r_type != R_PPC_PLTREL24)
5177 toff += irel->r_addend;
5178
5179 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5180
5181 roff = irel->r_offset;
5182 reladdr = isec->output_section->vma + isec->output_offset + roff;
5183
5184 /* If the branch is in range, no need to do anything. */
5185 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5186 continue;
5187
5188 /* Look for an existing fixup to this address. */
5189 for (f = fixups; f ; f = f->next)
5190 if (f->tsec == tsec && f->toff == toff)
5191 break;
5192
5193 if (f == NULL)
5194 {
5195 size_t size;
5196 unsigned long stub_rtype;
5197
5198 val = trampoff - roff;
5199 if (val >= max_branch_offset)
5200 /* Oh dear, we can't reach a trampoline. Don't try to add
5201 one. We'll report an error later. */
5202 continue;
5203
5204 if (link_info->shared)
5205 {
5206 size = 4 * ARRAY_SIZE (shared_stub_entry);
5207 insn_offset = 12;
5208 stub_rtype = R_PPC_RELAX32PC;
5209 }
5210 else
5211 {
5212 size = 4 * ARRAY_SIZE (stub_entry);
5213 insn_offset = 0;
5214 stub_rtype = R_PPC_RELAX32;
5215 }
5216
5217 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5218 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5219 abort ();
5220 if (tsec == htab->plt
5221 || tsec == htab->glink)
5222 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5223
5224 /* Hijack the old relocation. Since we need two
5225 relocations for this use a "composite" reloc. */
5226 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5227 stub_rtype);
5228 irel->r_offset = trampoff + insn_offset;
5229
5230 /* Record the fixup so we don't do it again this section. */
5231 f = bfd_malloc (sizeof (*f));
5232 f->next = fixups;
5233 f->tsec = tsec;
5234 f->toff = toff;
5235 f->trampoff = trampoff;
5236 fixups = f;
5237
5238 trampoff += size;
5239 }
5240 else
5241 {
5242 val = f->trampoff - roff;
5243 if (val >= max_branch_offset)
5244 continue;
5245
5246 /* Nop out the reloc, since we're finalizing things here. */
5247 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5248 }
5249
5250 /* Get the section contents. */
5251 if (contents == NULL)
5252 {
5253 /* Get cached copy if it exists. */
5254 if (elf_section_data (isec)->this_hdr.contents != NULL)
5255 contents = elf_section_data (isec)->this_hdr.contents;
5256 else
5257 {
5258 /* Go get them off disk. */
5259 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5260 goto error_return;
5261 }
5262 }
5263
5264 /* Fix up the existing branch to hit the trampoline. */
5265 hit_addr = contents + roff;
5266 switch (r_type)
5267 {
5268 case R_PPC_REL24:
5269 case R_PPC_LOCAL24PC:
5270 case R_PPC_PLTREL24:
5271 t0 = bfd_get_32 (abfd, hit_addr);
5272 t0 &= ~0x3fffffc;
5273 t0 |= val & 0x3fffffc;
5274 bfd_put_32 (abfd, t0, hit_addr);
5275 break;
5276
5277 case R_PPC_REL14:
5278 case R_PPC_REL14_BRTAKEN:
5279 case R_PPC_REL14_BRNTAKEN:
5280 t0 = bfd_get_32 (abfd, hit_addr);
5281 t0 &= ~0xfffc;
5282 t0 |= val & 0xfffc;
5283 bfd_put_32 (abfd, t0, hit_addr);
5284 break;
5285 }
5286 }
5287
5288 /* Write out the trampolines. */
5289 changed = fixups != NULL;
5290 if (fixups != NULL)
5291 {
5292 const int *stub;
5293 bfd_byte *dest;
5294 bfd_vma val;
5295 int i, size;
5296
5297 do
5298 {
5299 struct one_fixup *f = fixups;
5300 fixups = fixups->next;
5301 free (f);
5302 }
5303 while (fixups);
5304
5305 contents = bfd_realloc (contents, trampoff);
5306 if (contents == NULL)
5307 goto error_return;
5308
5309 isec->size = (isec->size + 3) & (bfd_vma) -4;
5310 /* Branch around the trampolines. */
5311 val = trampoff - isec->size + 0x48000000;
5312 dest = contents + isec->size;
5313 isec->size = trampoff;
5314 bfd_put_32 (abfd, val, dest);
5315 dest += 4;
5316
5317 if (link_info->shared)
5318 {
5319 stub = shared_stub_entry;
5320 size = ARRAY_SIZE (shared_stub_entry);
5321 }
5322 else
5323 {
5324 stub = stub_entry;
5325 size = ARRAY_SIZE (stub_entry);
5326 }
5327
5328 i = 0;
5329 while (dest < contents + trampoff)
5330 {
5331 bfd_put_32 (abfd, stub[i], dest);
5332 i++;
5333 if (i == size)
5334 i = 0;
5335 dest += 4;
5336 }
5337 BFD_ASSERT (i == 0);
5338 }
5339
5340 if (isymbuf != NULL
5341 && symtab_hdr->contents != (unsigned char *) isymbuf)
5342 {
5343 if (! link_info->keep_memory)
5344 free (isymbuf);
5345 else
5346 {
5347 /* Cache the symbols for elf_link_input_bfd. */
5348 symtab_hdr->contents = (unsigned char *) isymbuf;
5349 }
5350 }
5351
5352 if (contents != NULL
5353 && elf_section_data (isec)->this_hdr.contents != contents)
5354 {
5355 if (!changed && !link_info->keep_memory)
5356 free (contents);
5357 else
5358 {
5359 /* Cache the section contents for elf_link_input_bfd. */
5360 elf_section_data (isec)->this_hdr.contents = contents;
5361 }
5362 }
5363
5364 if (elf_section_data (isec)->relocs != internal_relocs)
5365 {
5366 if (!changed)
5367 free (internal_relocs);
5368 else
5369 elf_section_data (isec)->relocs = internal_relocs;
5370 }
5371
5372 *again = changed;
5373 return TRUE;
5374
5375 error_return:
5376 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5377 free (isymbuf);
5378 if (contents != NULL
5379 && elf_section_data (isec)->this_hdr.contents != contents)
5380 free (contents);
5381 if (internal_relocs != NULL
5382 && elf_section_data (isec)->relocs != internal_relocs)
5383 free (internal_relocs);
5384 return FALSE;
5385 }
5386 \f
5387 /* What to do when ld finds relocations against symbols defined in
5388 discarded sections. */
5389
5390 static unsigned int
5391 ppc_elf_action_discarded (asection *sec)
5392 {
5393 if (strcmp (".fixup", sec->name) == 0)
5394 return 0;
5395
5396 if (strcmp (".got2", sec->name) == 0)
5397 return 0;
5398
5399 return _bfd_elf_default_action_discarded (sec);
5400 }
5401 \f
5402 /* Fill in the address for a pointer generated in a linker section. */
5403
5404 static bfd_vma
5405 elf_finish_pointer_linker_section (bfd *input_bfd,
5406 elf_linker_section_t *lsect,
5407 struct elf_link_hash_entry *h,
5408 bfd_vma relocation,
5409 const Elf_Internal_Rela *rel)
5410 {
5411 elf_linker_section_pointers_t *linker_section_ptr;
5412
5413 BFD_ASSERT (lsect != NULL);
5414
5415 if (h != NULL)
5416 {
5417 /* Handle global symbol. */
5418 struct ppc_elf_link_hash_entry *eh;
5419
5420 eh = (struct ppc_elf_link_hash_entry *) h;
5421 BFD_ASSERT (eh->elf.def_regular);
5422 linker_section_ptr = eh->linker_section_pointer;
5423 }
5424 else
5425 {
5426 /* Handle local symbol. */
5427 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5428
5429 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5430 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5431 }
5432
5433 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5434 rel->r_addend,
5435 lsect);
5436 BFD_ASSERT (linker_section_ptr != NULL);
5437
5438 /* Offset will always be a multiple of four, so use the bottom bit
5439 as a "written" flag. */
5440 if ((linker_section_ptr->offset & 1) == 0)
5441 {
5442 bfd_put_32 (lsect->section->owner,
5443 relocation + linker_section_ptr->addend,
5444 lsect->section->contents + linker_section_ptr->offset);
5445 linker_section_ptr->offset += 1;
5446 }
5447
5448 relocation = (lsect->section->output_offset
5449 + linker_section_ptr->offset - 1
5450 - 0x8000);
5451
5452 #ifdef DEBUG
5453 fprintf (stderr,
5454 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5455 lsect->name, (long) relocation, (long) relocation);
5456 #endif
5457
5458 /* Subtract out the addend, because it will get added back in by the normal
5459 processing. */
5460 return relocation - linker_section_ptr->addend;
5461 }
5462
5463 /* The RELOCATE_SECTION function is called by the ELF backend linker
5464 to handle the relocations for a section.
5465
5466 The relocs are always passed as Rela structures; if the section
5467 actually uses Rel structures, the r_addend field will always be
5468 zero.
5469
5470 This function is responsible for adjust the section contents as
5471 necessary, and (if using Rela relocs and generating a
5472 relocatable output file) adjusting the reloc addend as
5473 necessary.
5474
5475 This function does not have to worry about setting the reloc
5476 address or the reloc symbol index.
5477
5478 LOCAL_SYMS is a pointer to the swapped in local symbols.
5479
5480 LOCAL_SECTIONS is an array giving the section in the input file
5481 corresponding to the st_shndx field of each local symbol.
5482
5483 The global hash table entry for the global symbols can be found
5484 via elf_sym_hashes (input_bfd).
5485
5486 When generating relocatable output, this function must handle
5487 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5488 going to be the section symbol corresponding to the output
5489 section, which means that the addend must be adjusted
5490 accordingly. */
5491
5492 static bfd_boolean
5493 ppc_elf_relocate_section (bfd *output_bfd,
5494 struct bfd_link_info *info,
5495 bfd *input_bfd,
5496 asection *input_section,
5497 bfd_byte *contents,
5498 Elf_Internal_Rela *relocs,
5499 Elf_Internal_Sym *local_syms,
5500 asection **local_sections)
5501 {
5502 Elf_Internal_Shdr *symtab_hdr;
5503 struct elf_link_hash_entry **sym_hashes;
5504 struct ppc_elf_link_hash_table *htab;
5505 Elf_Internal_Rela *rel;
5506 Elf_Internal_Rela *relend;
5507 Elf_Internal_Rela outrel;
5508 bfd_byte *loc;
5509 asection *got2, *sreloc = NULL;
5510 bfd_vma *local_got_offsets;
5511 bfd_boolean ret = TRUE;
5512
5513 #ifdef DEBUG
5514 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5515 "%ld relocations%s",
5516 input_bfd, input_section,
5517 (long) input_section->reloc_count,
5518 (info->relocatable) ? " (relocatable)" : "");
5519 #endif
5520
5521 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5522
5523 if (info->relocatable)
5524 {
5525 if (got2 == NULL)
5526 return TRUE;
5527
5528 rel = relocs;
5529 relend = relocs + input_section->reloc_count;
5530 for (; rel < relend; rel++)
5531 {
5532 enum elf_ppc_reloc_type r_type;
5533
5534 r_type = ELF32_R_TYPE (rel->r_info);
5535 if (r_type == R_PPC_PLTREL24
5536 && rel->r_addend >= 32768)
5537 {
5538 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5539 addend specifies the GOT pointer offset within .got2. */
5540 rel->r_addend += got2->output_offset;
5541 }
5542 }
5543 return TRUE;
5544 }
5545
5546 /* Initialize howto table if not already done. */
5547 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5548 ppc_elf_howto_init ();
5549
5550 htab = ppc_elf_hash_table (info);
5551 local_got_offsets = elf_local_got_offsets (input_bfd);
5552 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5553 sym_hashes = elf_sym_hashes (input_bfd);
5554 rel = relocs;
5555 relend = relocs + input_section->reloc_count;
5556 for (; rel < relend; rel++)
5557 {
5558 enum elf_ppc_reloc_type r_type;
5559 bfd_vma addend;
5560 bfd_reloc_status_type r;
5561 Elf_Internal_Sym *sym;
5562 asection *sec;
5563 struct elf_link_hash_entry *h;
5564 const char *sym_name;
5565 reloc_howto_type *howto;
5566 unsigned long r_symndx;
5567 bfd_vma relocation;
5568 bfd_vma branch_bit, insn, from;
5569 bfd_boolean unresolved_reloc;
5570 bfd_boolean warned;
5571 unsigned int tls_type, tls_mask, tls_gd;
5572
5573 r_type = ELF32_R_TYPE (rel->r_info);
5574 sym = NULL;
5575 sec = NULL;
5576 h = NULL;
5577 unresolved_reloc = FALSE;
5578 warned = FALSE;
5579 r_symndx = ELF32_R_SYM (rel->r_info);
5580
5581 if (r_symndx < symtab_hdr->sh_info)
5582 {
5583 sym = local_syms + r_symndx;
5584 sec = local_sections[r_symndx];
5585 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5586
5587 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5588 }
5589 else
5590 {
5591 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5592 r_symndx, symtab_hdr, sym_hashes,
5593 h, sec, relocation,
5594 unresolved_reloc, warned);
5595
5596 sym_name = h->root.root.string;
5597 }
5598
5599 /* TLS optimizations. Replace instruction sequences and relocs
5600 based on information we collected in tls_optimize. We edit
5601 RELOCS so that --emit-relocs will output something sensible
5602 for the final instruction stream. */
5603 tls_mask = 0;
5604 tls_gd = 0;
5605 if (IS_PPC_TLS_RELOC (r_type))
5606 {
5607 if (h != NULL)
5608 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5609 else if (local_got_offsets != NULL)
5610 {
5611 char *lgot_masks;
5612 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5613 tls_mask = lgot_masks[r_symndx];
5614 }
5615 }
5616
5617 /* Ensure reloc mapping code below stays sane. */
5618 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5619 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5620 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5621 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5622 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5623 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5624 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5625 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5626 abort ();
5627 switch (r_type)
5628 {
5629 default:
5630 break;
5631
5632 case R_PPC_GOT_TPREL16:
5633 case R_PPC_GOT_TPREL16_LO:
5634 if (tls_mask != 0
5635 && (tls_mask & TLS_TPREL) == 0)
5636 {
5637 bfd_vma insn;
5638 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5639 insn &= 31 << 21;
5640 insn |= 0x3c020000; /* addis 0,2,0 */
5641 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5642 r_type = R_PPC_TPREL16_HA;
5643 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5644 }
5645 break;
5646
5647 case R_PPC_TLS:
5648 if (tls_mask != 0
5649 && (tls_mask & TLS_TPREL) == 0)
5650 {
5651 bfd_vma insn, rtra;
5652 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5653 if ((insn & ((31 << 26) | (31 << 11)))
5654 == ((31 << 26) | (2 << 11)))
5655 rtra = insn & ((1 << 26) - (1 << 16));
5656 else if ((insn & ((31 << 26) | (31 << 16)))
5657 == ((31 << 26) | (2 << 16)))
5658 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5659 else
5660 abort ();
5661 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5662 /* add -> addi. */
5663 insn = 14 << 26;
5664 else if ((insn & (31 << 1)) == 23 << 1
5665 && ((insn & (31 << 6)) < 14 << 6
5666 || ((insn & (31 << 6)) >= 16 << 6
5667 && (insn & (31 << 6)) < 24 << 6)))
5668 /* load and store indexed -> dform. */
5669 insn = (32 | ((insn >> 6) & 31)) << 26;
5670 else if ((insn & (31 << 1)) == 21 << 1
5671 && (insn & (0x1a << 6)) == 0)
5672 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5673 insn = (((58 | ((insn >> 6) & 4)) << 26)
5674 | ((insn >> 6) & 1));
5675 else if ((insn & (31 << 1)) == 21 << 1
5676 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5677 /* lwax -> lwa. */
5678 insn = (58 << 26) | 2;
5679 else
5680 abort ();
5681 insn |= rtra;
5682 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5683 r_type = R_PPC_TPREL16_LO;
5684 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5685 /* Was PPC_TLS which sits on insn boundary, now
5686 PPC_TPREL16_LO which is at insn+2. */
5687 rel->r_offset += 2;
5688 }
5689 break;
5690
5691 case R_PPC_GOT_TLSGD16_HI:
5692 case R_PPC_GOT_TLSGD16_HA:
5693 tls_gd = TLS_TPRELGD;
5694 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5695 goto tls_gdld_hi;
5696 break;
5697
5698 case R_PPC_GOT_TLSLD16_HI:
5699 case R_PPC_GOT_TLSLD16_HA:
5700 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5701 {
5702 tls_gdld_hi:
5703 if ((tls_mask & tls_gd) != 0)
5704 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5705 + R_PPC_GOT_TPREL16);
5706 else
5707 {
5708 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5709 rel->r_offset -= 2;
5710 r_type = R_PPC_NONE;
5711 }
5712 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5713 }
5714 break;
5715
5716 case R_PPC_GOT_TLSGD16:
5717 case R_PPC_GOT_TLSGD16_LO:
5718 tls_gd = TLS_TPRELGD;
5719 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5720 goto tls_get_addr_check;
5721 break;
5722
5723 case R_PPC_GOT_TLSLD16:
5724 case R_PPC_GOT_TLSLD16_LO:
5725 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5726 {
5727 tls_get_addr_check:
5728 if (rel + 1 < relend)
5729 {
5730 enum elf_ppc_reloc_type r_type2;
5731 unsigned long r_symndx2;
5732 struct elf_link_hash_entry *h2;
5733 bfd_vma insn1, insn2;
5734 bfd_vma offset;
5735
5736 /* The next instruction should be a call to
5737 __tls_get_addr. Peek at the reloc to be sure. */
5738 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5739 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5740 if (r_symndx2 < symtab_hdr->sh_info
5741 || (r_type2 != R_PPC_REL14
5742 && r_type2 != R_PPC_REL14_BRTAKEN
5743 && r_type2 != R_PPC_REL14_BRNTAKEN
5744 && r_type2 != R_PPC_REL24
5745 && r_type2 != R_PPC_PLTREL24))
5746 break;
5747
5748 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5749 while (h2->root.type == bfd_link_hash_indirect
5750 || h2->root.type == bfd_link_hash_warning)
5751 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5752 if (h2 == NULL || h2 != htab->tls_get_addr)
5753 break;
5754
5755 /* OK, it checks out. Replace the call. */
5756 offset = rel[1].r_offset;
5757 insn1 = bfd_get_32 (output_bfd,
5758 contents + rel->r_offset - 2);
5759 if ((tls_mask & tls_gd) != 0)
5760 {
5761 /* IE */
5762 insn1 &= (1 << 26) - 1;
5763 insn1 |= 32 << 26; /* lwz */
5764 insn2 = 0x7c631214; /* add 3,3,2 */
5765 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5766 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5767 + R_PPC_GOT_TPREL16);
5768 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5769 }
5770 else
5771 {
5772 /* LE */
5773 insn1 = 0x3c620000; /* addis 3,2,0 */
5774 insn2 = 0x38630000; /* addi 3,3,0 */
5775 if (tls_gd == 0)
5776 {
5777 /* Was an LD reloc. */
5778 r_symndx = 0;
5779 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5780 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5781 }
5782 r_type = R_PPC_TPREL16_HA;
5783 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5784 rel[1].r_info = ELF32_R_INFO (r_symndx,
5785 R_PPC_TPREL16_LO);
5786 rel[1].r_offset += 2;
5787 }
5788 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5789 bfd_put_32 (output_bfd, insn2, contents + offset);
5790 if (tls_gd == 0)
5791 {
5792 /* We changed the symbol on an LD reloc. Start over
5793 in order to get h, sym, sec etc. right. */
5794 rel--;
5795 continue;
5796 }
5797 }
5798 }
5799 break;
5800 }
5801
5802 /* Handle other relocations that tweak non-addend part of insn. */
5803 branch_bit = 0;
5804 switch (r_type)
5805 {
5806 default:
5807 break;
5808
5809 /* Branch taken prediction relocations. */
5810 case R_PPC_ADDR14_BRTAKEN:
5811 case R_PPC_REL14_BRTAKEN:
5812 branch_bit = BRANCH_PREDICT_BIT;
5813 /* Fall thru */
5814
5815 /* Branch not taken prediction relocations. */
5816 case R_PPC_ADDR14_BRNTAKEN:
5817 case R_PPC_REL14_BRNTAKEN:
5818 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5819 insn &= ~BRANCH_PREDICT_BIT;
5820 insn |= branch_bit;
5821
5822 from = (rel->r_offset
5823 + input_section->output_offset
5824 + input_section->output_section->vma);
5825
5826 /* Invert 'y' bit if not the default. */
5827 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5828 insn ^= BRANCH_PREDICT_BIT;
5829
5830 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5831 break;
5832 }
5833
5834 addend = rel->r_addend;
5835 tls_type = 0;
5836 howto = NULL;
5837 if (r_type < R_PPC_max)
5838 howto = ppc_elf_howto_table[r_type];
5839 switch (r_type)
5840 {
5841 default:
5842 (*_bfd_error_handler)
5843 (_("%B: unknown relocation type %d for symbol %s"),
5844 input_bfd, (int) r_type, sym_name);
5845
5846 bfd_set_error (bfd_error_bad_value);
5847 ret = FALSE;
5848 continue;
5849
5850 case R_PPC_NONE:
5851 case R_PPC_TLS:
5852 case R_PPC_EMB_MRKREF:
5853 case R_PPC_GNU_VTINHERIT:
5854 case R_PPC_GNU_VTENTRY:
5855 continue;
5856
5857 /* GOT16 relocations. Like an ADDR16 using the symbol's
5858 address in the GOT as relocation value instead of the
5859 symbol's value itself. Also, create a GOT entry for the
5860 symbol and put the symbol value there. */
5861 case R_PPC_GOT_TLSGD16:
5862 case R_PPC_GOT_TLSGD16_LO:
5863 case R_PPC_GOT_TLSGD16_HI:
5864 case R_PPC_GOT_TLSGD16_HA:
5865 tls_type = TLS_TLS | TLS_GD;
5866 goto dogot;
5867
5868 case R_PPC_GOT_TLSLD16:
5869 case R_PPC_GOT_TLSLD16_LO:
5870 case R_PPC_GOT_TLSLD16_HI:
5871 case R_PPC_GOT_TLSLD16_HA:
5872 tls_type = TLS_TLS | TLS_LD;
5873 goto dogot;
5874
5875 case R_PPC_GOT_TPREL16:
5876 case R_PPC_GOT_TPREL16_LO:
5877 case R_PPC_GOT_TPREL16_HI:
5878 case R_PPC_GOT_TPREL16_HA:
5879 tls_type = TLS_TLS | TLS_TPREL;
5880 goto dogot;
5881
5882 case R_PPC_GOT_DTPREL16:
5883 case R_PPC_GOT_DTPREL16_LO:
5884 case R_PPC_GOT_DTPREL16_HI:
5885 case R_PPC_GOT_DTPREL16_HA:
5886 tls_type = TLS_TLS | TLS_DTPREL;
5887 goto dogot;
5888
5889 case R_PPC_GOT16:
5890 case R_PPC_GOT16_LO:
5891 case R_PPC_GOT16_HI:
5892 case R_PPC_GOT16_HA:
5893 dogot:
5894 {
5895 /* Relocation is to the entry for this symbol in the global
5896 offset table. */
5897 bfd_vma off;
5898 bfd_vma *offp;
5899 unsigned long indx;
5900
5901 if (htab->got == NULL)
5902 abort ();
5903
5904 indx = 0;
5905 if (tls_type == (TLS_TLS | TLS_LD)
5906 && (h == NULL
5907 || !h->def_dynamic))
5908 offp = &htab->tlsld_got.offset;
5909 else if (h != NULL)
5910 {
5911 bfd_boolean dyn;
5912 dyn = htab->elf.dynamic_sections_created;
5913 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5914 || (info->shared
5915 && SYMBOL_REFERENCES_LOCAL (info, h)))
5916 /* This is actually a static link, or it is a
5917 -Bsymbolic link and the symbol is defined
5918 locally, or the symbol was forced to be local
5919 because of a version file. */
5920 ;
5921 else
5922 {
5923 indx = h->dynindx;
5924 unresolved_reloc = FALSE;
5925 }
5926 offp = &h->got.offset;
5927 }
5928 else
5929 {
5930 if (local_got_offsets == NULL)
5931 abort ();
5932 offp = &local_got_offsets[r_symndx];
5933 }
5934
5935 /* The offset must always be a multiple of 4. We use the
5936 least significant bit to record whether we have already
5937 processed this entry. */
5938 off = *offp;
5939 if ((off & 1) != 0)
5940 off &= ~1;
5941 else
5942 {
5943 unsigned int tls_m = (tls_mask
5944 & (TLS_LD | TLS_GD | TLS_DTPREL
5945 | TLS_TPREL | TLS_TPRELGD));
5946
5947 if (offp == &htab->tlsld_got.offset)
5948 tls_m = TLS_LD;
5949 else if (h == NULL
5950 || !h->def_dynamic)
5951 tls_m &= ~TLS_LD;
5952
5953 /* We might have multiple got entries for this sym.
5954 Initialize them all. */
5955 do
5956 {
5957 int tls_ty = 0;
5958
5959 if ((tls_m & TLS_LD) != 0)
5960 {
5961 tls_ty = TLS_TLS | TLS_LD;
5962 tls_m &= ~TLS_LD;
5963 }
5964 else if ((tls_m & TLS_GD) != 0)
5965 {
5966 tls_ty = TLS_TLS | TLS_GD;
5967 tls_m &= ~TLS_GD;
5968 }
5969 else if ((tls_m & TLS_DTPREL) != 0)
5970 {
5971 tls_ty = TLS_TLS | TLS_DTPREL;
5972 tls_m &= ~TLS_DTPREL;
5973 }
5974 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5975 {
5976 tls_ty = TLS_TLS | TLS_TPREL;
5977 tls_m = 0;
5978 }
5979
5980 /* Generate relocs for the dynamic linker. */
5981 if ((info->shared || indx != 0)
5982 && (h == NULL
5983 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5984 || h->root.type != bfd_link_hash_undefweak))
5985 {
5986 outrel.r_offset = (htab->got->output_section->vma
5987 + htab->got->output_offset
5988 + off);
5989 outrel.r_addend = 0;
5990 if (tls_ty & (TLS_LD | TLS_GD))
5991 {
5992 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5993 if (tls_ty == (TLS_TLS | TLS_GD))
5994 {
5995 loc = htab->relgot->contents;
5996 loc += (htab->relgot->reloc_count++
5997 * sizeof (Elf32_External_Rela));
5998 bfd_elf32_swap_reloca_out (output_bfd,
5999 &outrel, loc);
6000 outrel.r_offset += 4;
6001 outrel.r_info
6002 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6003 }
6004 }
6005 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6006 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6007 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6008 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6009 else if (indx == 0)
6010 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6011 else
6012 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6013 if (indx == 0)
6014 {
6015 outrel.r_addend += relocation;
6016 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6017 outrel.r_addend -= htab->elf.tls_sec->vma;
6018 }
6019 loc = htab->relgot->contents;
6020 loc += (htab->relgot->reloc_count++
6021 * sizeof (Elf32_External_Rela));
6022 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6023 }
6024
6025 /* Init the .got section contents if we're not
6026 emitting a reloc. */
6027 else
6028 {
6029 bfd_vma value = relocation;
6030
6031 if (tls_ty == (TLS_TLS | TLS_LD))
6032 value = 1;
6033 else if (tls_ty != 0)
6034 {
6035 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6036 if (tls_ty == (TLS_TLS | TLS_TPREL))
6037 value += DTP_OFFSET - TP_OFFSET;
6038
6039 if (tls_ty == (TLS_TLS | TLS_GD))
6040 {
6041 bfd_put_32 (output_bfd, value,
6042 htab->got->contents + off + 4);
6043 value = 1;
6044 }
6045 }
6046 bfd_put_32 (output_bfd, value,
6047 htab->got->contents + off);
6048 }
6049
6050 off += 4;
6051 if (tls_ty & (TLS_LD | TLS_GD))
6052 off += 4;
6053 }
6054 while (tls_m != 0);
6055
6056 off = *offp;
6057 *offp = off | 1;
6058 }
6059
6060 if (off >= (bfd_vma) -2)
6061 abort ();
6062
6063 if ((tls_type & TLS_TLS) != 0)
6064 {
6065 if (tls_type != (TLS_TLS | TLS_LD))
6066 {
6067 if ((tls_mask & TLS_LD) != 0
6068 && !(h == NULL
6069 || !h->def_dynamic))
6070 off += 8;
6071 if (tls_type != (TLS_TLS | TLS_GD))
6072 {
6073 if ((tls_mask & TLS_GD) != 0)
6074 off += 8;
6075 if (tls_type != (TLS_TLS | TLS_DTPREL))
6076 {
6077 if ((tls_mask & TLS_DTPREL) != 0)
6078 off += 4;
6079 }
6080 }
6081 }
6082 }
6083
6084 relocation = htab->got->output_offset + off;
6085 relocation -= htab->elf.hgot->root.u.def.value;
6086
6087 /* Addends on got relocations don't make much sense.
6088 x+off@got is actually x@got+off, and since the got is
6089 generated by a hash table traversal, the value in the
6090 got at entry m+n bears little relation to the entry m. */
6091 if (addend != 0)
6092 (*_bfd_error_handler)
6093 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6094 input_bfd,
6095 input_section,
6096 (long) rel->r_offset,
6097 howto->name,
6098 sym_name);
6099 }
6100 break;
6101
6102 /* Relocations that need no special processing. */
6103 case R_PPC_LOCAL24PC:
6104 /* It makes no sense to point a local relocation
6105 at a symbol not in this object. */
6106 if (unresolved_reloc)
6107 {
6108 if (! (*info->callbacks->undefined_symbol) (info,
6109 h->root.root.string,
6110 input_bfd,
6111 input_section,
6112 rel->r_offset,
6113 TRUE))
6114 return FALSE;
6115 continue;
6116 }
6117 break;
6118
6119 case R_PPC_DTPREL16:
6120 case R_PPC_DTPREL16_LO:
6121 case R_PPC_DTPREL16_HI:
6122 case R_PPC_DTPREL16_HA:
6123 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6124 break;
6125
6126 /* Relocations that may need to be propagated if this is a shared
6127 object. */
6128 case R_PPC_TPREL16:
6129 case R_PPC_TPREL16_LO:
6130 case R_PPC_TPREL16_HI:
6131 case R_PPC_TPREL16_HA:
6132 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6133 /* The TPREL16 relocs shouldn't really be used in shared
6134 libs as they will result in DT_TEXTREL being set, but
6135 support them anyway. */
6136 goto dodyn;
6137
6138 case R_PPC_TPREL32:
6139 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6140 goto dodyn;
6141
6142 case R_PPC_DTPREL32:
6143 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6144 goto dodyn;
6145
6146 case R_PPC_DTPMOD32:
6147 relocation = 1;
6148 addend = 0;
6149 goto dodyn;
6150
6151 case R_PPC_REL16:
6152 case R_PPC_REL16_LO:
6153 case R_PPC_REL16_HI:
6154 case R_PPC_REL16_HA:
6155 break;
6156
6157 case R_PPC_REL24:
6158 case R_PPC_REL32:
6159 case R_PPC_REL14:
6160 case R_PPC_REL14_BRTAKEN:
6161 case R_PPC_REL14_BRNTAKEN:
6162 /* If these relocations are not to a named symbol, they can be
6163 handled right here, no need to bother the dynamic linker. */
6164 if (SYMBOL_REFERENCES_LOCAL (info, h)
6165 || h == htab->elf.hgot)
6166 break;
6167 /* fall through */
6168
6169 /* Relocations that always need to be propagated if this is a shared
6170 object. */
6171 case R_PPC_ADDR32:
6172 case R_PPC_ADDR24:
6173 case R_PPC_ADDR16:
6174 case R_PPC_ADDR16_LO:
6175 case R_PPC_ADDR16_HI:
6176 case R_PPC_ADDR16_HA:
6177 case R_PPC_ADDR14:
6178 case R_PPC_ADDR14_BRTAKEN:
6179 case R_PPC_ADDR14_BRNTAKEN:
6180 case R_PPC_UADDR32:
6181 case R_PPC_UADDR16:
6182 /* r_symndx will be zero only for relocs against symbols
6183 from removed linkonce sections, or sections discarded by
6184 a linker script. */
6185 dodyn:
6186 if (r_symndx == 0)
6187 break;
6188 /* Fall thru. */
6189
6190 if ((input_section->flags & SEC_ALLOC) == 0)
6191 break;
6192 /* Fall thru. */
6193
6194 if ((info->shared
6195 && (h == NULL
6196 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6197 || h->root.type != bfd_link_hash_undefweak)
6198 && (MUST_BE_DYN_RELOC (r_type)
6199 || !SYMBOL_CALLS_LOCAL (info, h)))
6200 || (ELIMINATE_COPY_RELOCS
6201 && !info->shared
6202 && h != NULL
6203 && h->dynindx != -1
6204 && !h->non_got_ref
6205 && h->def_dynamic
6206 && !h->def_regular))
6207 {
6208 int skip;
6209
6210 #ifdef DEBUG
6211 fprintf (stderr, "ppc_elf_relocate_section needs to "
6212 "create relocation for %s\n",
6213 (h && h->root.root.string
6214 ? h->root.root.string : "<unknown>"));
6215 #endif
6216
6217 /* When generating a shared object, these relocations
6218 are copied into the output file to be resolved at run
6219 time. */
6220 if (sreloc == NULL)
6221 {
6222 const char *name;
6223
6224 name = (bfd_elf_string_from_elf_section
6225 (input_bfd,
6226 elf_elfheader (input_bfd)->e_shstrndx,
6227 elf_section_data (input_section)->rel_hdr.sh_name));
6228 if (name == NULL)
6229 return FALSE;
6230
6231 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6232 && strcmp (bfd_get_section_name (input_bfd,
6233 input_section),
6234 name + 5) == 0);
6235
6236 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6237 BFD_ASSERT (sreloc != NULL);
6238 }
6239
6240 skip = 0;
6241
6242 outrel.r_offset =
6243 _bfd_elf_section_offset (output_bfd, info, input_section,
6244 rel->r_offset);
6245 if (outrel.r_offset == (bfd_vma) -1
6246 || outrel.r_offset == (bfd_vma) -2)
6247 skip = (int) outrel.r_offset;
6248 outrel.r_offset += (input_section->output_section->vma
6249 + input_section->output_offset);
6250
6251 if (skip)
6252 memset (&outrel, 0, sizeof outrel);
6253 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6254 {
6255 unresolved_reloc = FALSE;
6256 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6257 outrel.r_addend = rel->r_addend;
6258 }
6259 else
6260 {
6261 outrel.r_addend = relocation + rel->r_addend;
6262
6263 if (r_type == R_PPC_ADDR32)
6264 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6265 else
6266 {
6267 long indx;
6268
6269 if (bfd_is_abs_section (sec))
6270 indx = 0;
6271 else if (sec == NULL || sec->owner == NULL)
6272 {
6273 bfd_set_error (bfd_error_bad_value);
6274 return FALSE;
6275 }
6276 else
6277 {
6278 asection *osec;
6279
6280 /* We are turning this relocation into one
6281 against a section symbol. It would be
6282 proper to subtract the symbol's value,
6283 osec->vma, from the emitted reloc addend,
6284 but ld.so expects buggy relocs. */
6285 osec = sec->output_section;
6286 indx = elf_section_data (osec)->dynindx;
6287 BFD_ASSERT (indx > 0);
6288 #ifdef DEBUG
6289 if (indx <= 0)
6290 printf ("indx=%d section=%s flags=%08x name=%s\n",
6291 indx, osec->name, osec->flags,
6292 h->root.root.string);
6293 #endif
6294 }
6295
6296 outrel.r_info = ELF32_R_INFO (indx, r_type);
6297 }
6298 }
6299
6300 loc = sreloc->contents;
6301 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6302 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6303
6304 if (skip == -1)
6305 continue;
6306
6307 /* This reloc will be computed at runtime. We clear the memory
6308 so that it contains predictable value. */
6309 if (! skip
6310 && ((input_section->flags & SEC_ALLOC) != 0
6311 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6312 {
6313 relocation = howto->pc_relative ? outrel.r_offset : 0;
6314 addend = 0;
6315 break;
6316 }
6317 }
6318 break;
6319
6320 case R_PPC_RELAX32PC_PLT:
6321 case R_PPC_RELAX32_PLT:
6322 {
6323 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6324
6325 if (htab->plt_type == PLT_NEW)
6326 relocation = (htab->glink->output_section->vma
6327 + htab->glink->output_offset
6328 + ent->glink_offset);
6329 else
6330 relocation = (htab->plt->output_section->vma
6331 + htab->plt->output_offset
6332 + ent->plt.offset);
6333 addend = 0;
6334 }
6335 if (r_type == R_PPC_RELAX32_PLT)
6336 goto relax32;
6337 /* Fall thru */
6338
6339 case R_PPC_RELAX32PC:
6340 relocation -= (input_section->output_section->vma
6341 + input_section->output_offset
6342 + rel->r_offset - 4);
6343 /* Fall thru */
6344
6345 case R_PPC_RELAX32:
6346 relax32:
6347 {
6348 unsigned long t0;
6349 unsigned long t1;
6350
6351 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6352 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6353
6354 /* We're clearing the bits for R_PPC_ADDR16_HA
6355 and R_PPC_ADDR16_LO here. */
6356 t0 &= ~0xffff;
6357 t1 &= ~0xffff;
6358
6359 /* t0 is HA, t1 is LO */
6360 relocation += addend;
6361 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6362 t1 |= relocation & 0xffff;
6363
6364 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6365 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6366 }
6367 continue;
6368
6369 /* Indirect .sdata relocation. */
6370 case R_PPC_EMB_SDAI16:
6371 BFD_ASSERT (htab->sdata[0].section != NULL);
6372 relocation
6373 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6374 h, relocation, rel);
6375 break;
6376
6377 /* Indirect .sdata2 relocation. */
6378 case R_PPC_EMB_SDA2I16:
6379 BFD_ASSERT (htab->sdata[1].section != NULL);
6380 relocation
6381 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6382 h, relocation, rel);
6383 break;
6384
6385 /* Handle the TOC16 reloc. We want to use the offset within the .got
6386 section, not the actual VMA. This is appropriate when generating
6387 an embedded ELF object, for which the .got section acts like the
6388 AIX .toc section. */
6389 case R_PPC_TOC16: /* phony GOT16 relocations */
6390 BFD_ASSERT (sec != NULL);
6391 BFD_ASSERT (bfd_is_und_section (sec)
6392 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6393 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6394
6395 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6396 break;
6397
6398 case R_PPC_PLTREL24:
6399 /* Relocation is to the entry for this symbol in the
6400 procedure linkage table. */
6401 {
6402 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6403
6404 addend = 0;
6405 if (ent == NULL
6406 || htab->plt == NULL)
6407 {
6408 /* We didn't make a PLT entry for this symbol. This
6409 happens when statically linking PIC code, or when
6410 using -Bsymbolic. */
6411 break;
6412 }
6413
6414 unresolved_reloc = FALSE;
6415 if (htab->plt_type == PLT_NEW)
6416 relocation = (htab->glink->output_section->vma
6417 + htab->glink->output_offset
6418 + ent->glink_offset);
6419 else
6420 relocation = (htab->plt->output_section->vma
6421 + htab->plt->output_offset
6422 + ent->plt.offset);
6423 }
6424 break;
6425
6426 /* Relocate against _SDA_BASE_. */
6427 case R_PPC_SDAREL16:
6428 {
6429 const char *name;
6430 struct elf_link_hash_entry *sh;
6431
6432 BFD_ASSERT (sec != NULL);
6433 name = bfd_get_section_name (abfd, sec->output_section);
6434 if (! ((strncmp (name, ".sdata", 6) == 0
6435 && (name[6] == 0 || name[6] == '.'))
6436 || (strncmp (name, ".sbss", 5) == 0
6437 && (name[5] == 0 || name[5] == '.'))))
6438 {
6439 (*_bfd_error_handler)
6440 (_("%B: the target (%s) of a %s relocation is "
6441 "in the wrong output section (%s)"),
6442 input_bfd,
6443 sym_name,
6444 howto->name,
6445 name);
6446 }
6447 sh = htab->sdata[0].sym;
6448 addend -= (sh->root.u.def.value
6449 + sh->root.u.def.section->output_offset
6450 + sh->root.u.def.section->output_section->vma);
6451 }
6452 break;
6453
6454 /* Relocate against _SDA2_BASE_. */
6455 case R_PPC_EMB_SDA2REL:
6456 {
6457 const char *name;
6458 struct elf_link_hash_entry *sh;
6459
6460 BFD_ASSERT (sec != NULL);
6461 name = bfd_get_section_name (abfd, sec->output_section);
6462 if (! (strncmp (name, ".sdata2", 7) == 0
6463 || strncmp (name, ".sbss2", 6) == 0))
6464 {
6465 (*_bfd_error_handler)
6466 (_("%B: the target (%s) of a %s relocation is "
6467 "in the wrong output section (%s)"),
6468 input_bfd,
6469 sym_name,
6470 howto->name,
6471 name);
6472
6473 bfd_set_error (bfd_error_bad_value);
6474 ret = FALSE;
6475 continue;
6476 }
6477 sh = htab->sdata[1].sym;
6478 addend -= (sh->root.u.def.value
6479 + sh->root.u.def.section->output_offset
6480 + sh->root.u.def.section->output_section->vma);
6481 }
6482 break;
6483
6484 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6485 case R_PPC_EMB_SDA21:
6486 case R_PPC_EMB_RELSDA:
6487 {
6488 const char *name;
6489 int reg;
6490 struct elf_link_hash_entry *sh;
6491
6492 BFD_ASSERT (sec != NULL);
6493 name = bfd_get_section_name (abfd, sec->output_section);
6494 if (((strncmp (name, ".sdata", 6) == 0
6495 && (name[6] == 0 || name[6] == '.'))
6496 || (strncmp (name, ".sbss", 5) == 0
6497 && (name[5] == 0 || name[5] == '.'))))
6498 {
6499 reg = 13;
6500 sh = htab->sdata[0].sym;
6501 addend -= (sh->root.u.def.value
6502 + sh->root.u.def.section->output_offset
6503 + sh->root.u.def.section->output_section->vma);
6504 }
6505
6506 else if (strncmp (name, ".sdata2", 7) == 0
6507 || strncmp (name, ".sbss2", 6) == 0)
6508 {
6509 reg = 2;
6510 sh = htab->sdata[1].sym;
6511 addend -= (sh->root.u.def.value
6512 + sh->root.u.def.section->output_offset
6513 + sh->root.u.def.section->output_section->vma);
6514 }
6515
6516 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6517 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6518 {
6519 reg = 0;
6520 }
6521
6522 else
6523 {
6524 (*_bfd_error_handler)
6525 (_("%B: the target (%s) of a %s relocation is "
6526 "in the wrong output section (%s)"),
6527 input_bfd,
6528 sym_name,
6529 howto->name,
6530 name);
6531
6532 bfd_set_error (bfd_error_bad_value);
6533 ret = FALSE;
6534 continue;
6535 }
6536
6537 if (r_type == R_PPC_EMB_SDA21)
6538 { /* fill in register field */
6539 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6540 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6541 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6542 }
6543 }
6544 break;
6545
6546 /* Relocate against the beginning of the section. */
6547 case R_PPC_SECTOFF:
6548 case R_PPC_SECTOFF_LO:
6549 case R_PPC_SECTOFF_HI:
6550 case R_PPC_SECTOFF_HA:
6551 BFD_ASSERT (sec != NULL);
6552 addend -= sec->output_section->vma;
6553 break;
6554
6555 /* Negative relocations. */
6556 case R_PPC_EMB_NADDR32:
6557 case R_PPC_EMB_NADDR16:
6558 case R_PPC_EMB_NADDR16_LO:
6559 case R_PPC_EMB_NADDR16_HI:
6560 case R_PPC_EMB_NADDR16_HA:
6561 addend -= 2 * relocation;
6562 break;
6563
6564 case R_PPC_COPY:
6565 case R_PPC_GLOB_DAT:
6566 case R_PPC_JMP_SLOT:
6567 case R_PPC_RELATIVE:
6568 case R_PPC_PLT32:
6569 case R_PPC_PLTREL32:
6570 case R_PPC_PLT16_LO:
6571 case R_PPC_PLT16_HI:
6572 case R_PPC_PLT16_HA:
6573 case R_PPC_ADDR30:
6574 case R_PPC_EMB_RELSEC16:
6575 case R_PPC_EMB_RELST_LO:
6576 case R_PPC_EMB_RELST_HI:
6577 case R_PPC_EMB_RELST_HA:
6578 case R_PPC_EMB_BIT_FLD:
6579 (*_bfd_error_handler)
6580 (_("%B: relocation %s is not yet supported for symbol %s."),
6581 input_bfd,
6582 howto->name,
6583 sym_name);
6584
6585 bfd_set_error (bfd_error_invalid_operation);
6586 ret = FALSE;
6587 continue;
6588 }
6589
6590 /* Do any further special processing. */
6591 switch (r_type)
6592 {
6593 default:
6594 break;
6595
6596 case R_PPC_ADDR16_HA:
6597 case R_PPC_REL16_HA:
6598 case R_PPC_GOT16_HA:
6599 case R_PPC_PLT16_HA:
6600 case R_PPC_SECTOFF_HA:
6601 case R_PPC_TPREL16_HA:
6602 case R_PPC_DTPREL16_HA:
6603 case R_PPC_GOT_TLSGD16_HA:
6604 case R_PPC_GOT_TLSLD16_HA:
6605 case R_PPC_GOT_TPREL16_HA:
6606 case R_PPC_GOT_DTPREL16_HA:
6607 case R_PPC_EMB_NADDR16_HA:
6608 case R_PPC_EMB_RELST_HA:
6609 /* It's just possible that this symbol is a weak symbol
6610 that's not actually defined anywhere. In that case,
6611 'sec' would be NULL, and we should leave the symbol
6612 alone (it will be set to zero elsewhere in the link). */
6613 if (sec != NULL)
6614 /* Add 0x10000 if sign bit in 0:15 is set.
6615 Bits 0:15 are not used. */
6616 addend += 0x8000;
6617 break;
6618 }
6619
6620 #ifdef DEBUG
6621 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6622 "offset = %ld, addend = %ld\n",
6623 howto->name,
6624 (int) r_type,
6625 sym_name,
6626 r_symndx,
6627 (long) rel->r_offset,
6628 (long) addend);
6629 #endif
6630
6631 if (unresolved_reloc
6632 && !((input_section->flags & SEC_DEBUGGING) != 0
6633 && h->def_dynamic))
6634 {
6635 (*_bfd_error_handler)
6636 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6637 input_bfd,
6638 input_section,
6639 (long) rel->r_offset,
6640 howto->name,
6641 sym_name);
6642 ret = FALSE;
6643 }
6644
6645 r = _bfd_final_link_relocate (howto,
6646 input_bfd,
6647 input_section,
6648 contents,
6649 rel->r_offset,
6650 relocation,
6651 addend);
6652
6653 if (r != bfd_reloc_ok)
6654 {
6655 if (r == bfd_reloc_overflow)
6656 {
6657 if (warned)
6658 continue;
6659 if (h != NULL
6660 && h->root.type == bfd_link_hash_undefweak
6661 && howto->pc_relative)
6662 {
6663 /* Assume this is a call protected by other code that
6664 detect the symbol is undefined. If this is the case,
6665 we can safely ignore the overflow. If not, the
6666 program is hosed anyway, and a little warning isn't
6667 going to help. */
6668
6669 continue;
6670 }
6671
6672 if (! (*info->callbacks->reloc_overflow) (info,
6673 (h ? &h->root : NULL),
6674 sym_name,
6675 howto->name,
6676 rel->r_addend,
6677 input_bfd,
6678 input_section,
6679 rel->r_offset))
6680 return FALSE;
6681 }
6682 else
6683 {
6684 (*_bfd_error_handler)
6685 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6686 input_bfd, input_section,
6687 (long) rel->r_offset, howto->name, sym_name, (int) r);
6688 ret = FALSE;
6689 }
6690 }
6691 }
6692
6693 #ifdef DEBUG
6694 fprintf (stderr, "\n");
6695 #endif
6696
6697 return ret;
6698 }
6699 \f
6700 #define PPC_LO(v) ((v) & 0xffff)
6701 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6702 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6703
6704 /* Finish up dynamic symbol handling. We set the contents of various
6705 dynamic sections here. */
6706
6707 static bfd_boolean
6708 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6709 struct bfd_link_info *info,
6710 struct elf_link_hash_entry *h,
6711 Elf_Internal_Sym *sym)
6712 {
6713 struct ppc_elf_link_hash_table *htab;
6714 struct plt_entry *ent;
6715 bfd_boolean doneone;
6716
6717 #ifdef DEBUG
6718 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6719 h->root.root.string);
6720 #endif
6721
6722 htab = ppc_elf_hash_table (info);
6723 BFD_ASSERT (htab->elf.dynobj != NULL);
6724
6725 doneone = FALSE;
6726 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6727 if (ent->plt.offset != (bfd_vma) -1)
6728 {
6729 if (!doneone)
6730 {
6731 Elf_Internal_Rela rela;
6732 bfd_byte *loc;
6733 bfd_vma reloc_index;
6734
6735 if (htab->plt_type == PLT_NEW)
6736 reloc_index = ent->plt.offset / 4;
6737 else
6738 {
6739 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6740 / htab->plt_slot_size);
6741 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6742 && htab->plt_type == PLT_OLD)
6743 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6744 }
6745
6746 /* This symbol has an entry in the procedure linkage table.
6747 Set it up. */
6748 if (htab->plt_type == PLT_VXWORKS)
6749 {
6750 bfd_vma got_offset;
6751 const bfd_vma *plt_entry;
6752
6753 /* The first three entries in .got.plt are reserved. */
6754 got_offset = (reloc_index + 3) * 4;
6755
6756 /* Use the right PLT. */
6757 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6758 : ppc_elf_vxworks_plt_entry;
6759
6760 /* Fill in the .plt on VxWorks. */
6761 if (info->shared)
6762 {
6763 bfd_vma got_offset_hi = (got_offset >> 16)
6764 + ((got_offset & 0x8000) >> 15);
6765
6766 bfd_put_32 (output_bfd,
6767 plt_entry[0] | (got_offset_hi & 0xffff),
6768 htab->plt->contents + ent->plt.offset + 0);
6769 bfd_put_32 (output_bfd,
6770 plt_entry[1] | (got_offset & 0xffff),
6771 htab->plt->contents + ent->plt.offset + 4);
6772 }
6773 else
6774 {
6775 bfd_vma got_loc
6776 = (got_offset
6777 + htab->elf.hgot->root.u.def.value
6778 + htab->elf.hgot->root.u.def.section->output_offset
6779 + htab->elf.hgot->root.u.def.section->output_section->vma);
6780 bfd_vma got_loc_hi = (got_loc >> 16)
6781 + ((got_loc & 0x8000) >> 15);
6782
6783 bfd_put_32 (output_bfd,
6784 plt_entry[0] | (got_loc_hi & 0xffff),
6785 htab->plt->contents + ent->plt.offset + 0);
6786 bfd_put_32 (output_bfd,
6787 plt_entry[1] | (got_loc & 0xffff),
6788 htab->plt->contents + ent->plt.offset + 4);
6789 }
6790
6791 bfd_put_32 (output_bfd, plt_entry[2],
6792 htab->plt->contents + ent->plt.offset + 8);
6793 bfd_put_32 (output_bfd, plt_entry[3],
6794 htab->plt->contents + ent->plt.offset + 12);
6795
6796 /* This instruction is an immediate load. The value loaded is
6797 the byte offset of the R_PPC_JMP_SLOT relocation from the
6798 start of the .rela.plt section. The value is stored in the
6799 low-order 16 bits of the load instruction. */
6800 /* NOTE: It appears that this is now an index rather than a
6801 prescaled offset. */
6802 bfd_put_32 (output_bfd,
6803 plt_entry[4] | reloc_index,
6804 htab->plt->contents + ent->plt.offset + 16);
6805 /* This instruction is a PC-relative branch whose target is
6806 the start of the PLT section. The address of this branch
6807 instruction is 20 bytes beyond the start of this PLT entry.
6808 The address is encoded in bits 6-29, inclusive. The value
6809 stored is right-shifted by two bits, permitting a 26-bit
6810 offset. */
6811 bfd_put_32 (output_bfd,
6812 (plt_entry[5]
6813 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6814 htab->plt->contents + ent->plt.offset + 20);
6815 bfd_put_32 (output_bfd, plt_entry[6],
6816 htab->plt->contents + ent->plt.offset + 24);
6817 bfd_put_32 (output_bfd, plt_entry[7],
6818 htab->plt->contents + ent->plt.offset + 28);
6819
6820 /* Fill in the GOT entry corresponding to this PLT slot with
6821 the address immediately after the the "bctr" instruction
6822 in this PLT entry. */
6823 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6824 + htab->plt->output_offset
6825 + ent->plt.offset + 16),
6826 htab->sgotplt->contents + got_offset);
6827
6828 if (!info->shared)
6829 {
6830 /* Fill in a couple of entries in .rela.plt.unloaded. */
6831 loc = htab->srelplt2->contents
6832 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6833 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6834 * sizeof (Elf32_External_Rela));
6835
6836 /* Provide the @ha relocation for the first instruction. */
6837 rela.r_offset = (htab->plt->output_section->vma
6838 + htab->plt->output_offset
6839 + ent->plt.offset + 2);
6840 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6841 R_PPC_ADDR16_HA);
6842 rela.r_addend = got_offset;
6843 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6844 loc += sizeof (Elf32_External_Rela);
6845
6846 /* Provide the @l relocation for the second instruction. */
6847 rela.r_offset = (htab->plt->output_section->vma
6848 + htab->plt->output_offset
6849 + ent->plt.offset + 6);
6850 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6851 R_PPC_ADDR16_LO);
6852 rela.r_addend = got_offset;
6853 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6854 loc += sizeof (Elf32_External_Rela);
6855
6856 /* Provide a relocation for the GOT entry corresponding to this
6857 PLT slot. Point it at the middle of the .plt entry. */
6858 rela.r_offset = (htab->sgotplt->output_section->vma
6859 + htab->sgotplt->output_offset
6860 + got_offset);
6861 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6862 R_PPC_ADDR32);
6863 rela.r_addend = ent->plt.offset + 16;
6864 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6865 }
6866
6867 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6868 In particular, the offset for the relocation is not the
6869 address of the PLT entry for this function, as specified
6870 by the ABI. Instead, the offset is set to the address of
6871 the GOT slot for this function. See EABI 4.4.4.1. */
6872 rela.r_offset = (htab->sgotplt->output_section->vma
6873 + htab->sgotplt->output_offset
6874 + got_offset);
6875
6876 }
6877 else
6878 {
6879 rela.r_offset = (htab->plt->output_section->vma
6880 + htab->plt->output_offset
6881 + ent->plt.offset);
6882 if (htab->plt_type == PLT_OLD)
6883 {
6884 /* We don't need to fill in the .plt. The ppc dynamic
6885 linker will fill it in. */
6886 }
6887 else
6888 {
6889 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6890 + htab->glink->output_section->vma
6891 + htab->glink->output_offset);
6892 bfd_put_32 (output_bfd, val,
6893 htab->plt->contents + ent->plt.offset);
6894 }
6895 }
6896
6897 /* Fill in the entry in the .rela.plt section. */
6898 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6899 rela.r_addend = 0;
6900
6901 loc = (htab->relplt->contents
6902 + reloc_index * sizeof (Elf32_External_Rela));
6903 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6904
6905 if (!h->def_regular)
6906 {
6907 /* Mark the symbol as undefined, rather than as defined in
6908 the .plt section. Leave the value alone. */
6909 sym->st_shndx = SHN_UNDEF;
6910 /* If the symbol is weak, we do need to clear the value.
6911 Otherwise, the PLT entry would provide a definition for
6912 the symbol even if the symbol wasn't defined anywhere,
6913 and so the symbol would never be NULL. */
6914 if (!h->ref_regular_nonweak)
6915 sym->st_value = 0;
6916 }
6917 doneone = TRUE;
6918 }
6919
6920 if (htab->plt_type == PLT_NEW)
6921 {
6922 bfd_vma plt;
6923 unsigned char *p;
6924
6925 plt = (ent->plt.offset
6926 + htab->plt->output_section->vma
6927 + htab->plt->output_offset);
6928 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6929
6930 if (info->shared || info->pie)
6931 {
6932 bfd_vma got = 0;
6933
6934 if (ent->addend >= 32768)
6935 got = (ent->addend
6936 + ent->sec->output_section->vma
6937 + ent->sec->output_offset);
6938 else if (htab->elf.hgot != NULL)
6939 got = (htab->elf.hgot->root.u.def.value
6940 + htab->elf.hgot->root.u.def.section->output_section->vma
6941 + htab->elf.hgot->root.u.def.section->output_offset);
6942
6943 plt -= got;
6944
6945 if (plt + 0x8000 < 0x10000)
6946 {
6947 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6948 p += 4;
6949 bfd_put_32 (output_bfd, MTCTR_11, p);
6950 p += 4;
6951 bfd_put_32 (output_bfd, BCTR, p);
6952 p += 4;
6953 bfd_put_32 (output_bfd, NOP, p);
6954 p += 4;
6955 }
6956 else
6957 {
6958 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6959 p += 4;
6960 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6961 p += 4;
6962 bfd_put_32 (output_bfd, MTCTR_11, p);
6963 p += 4;
6964 bfd_put_32 (output_bfd, BCTR, p);
6965 p += 4;
6966 }
6967 }
6968 else
6969 {
6970 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6971 p += 4;
6972 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6973 p += 4;
6974 bfd_put_32 (output_bfd, MTCTR_11, p);
6975 p += 4;
6976 bfd_put_32 (output_bfd, BCTR, p);
6977 p += 4;
6978
6979 /* We only need one non-PIC glink stub. */
6980 break;
6981 }
6982 }
6983 else
6984 break;
6985 }
6986
6987 if (h->needs_copy)
6988 {
6989 asection *s;
6990 Elf_Internal_Rela rela;
6991 bfd_byte *loc;
6992
6993 /* This symbols needs a copy reloc. Set it up. */
6994
6995 #ifdef DEBUG
6996 fprintf (stderr, ", copy");
6997 #endif
6998
6999 BFD_ASSERT (h->dynindx != -1);
7000
7001 if (ppc_elf_hash_entry (h)->has_sda_refs)
7002 s = htab->relsbss;
7003 else
7004 s = htab->relbss;
7005 BFD_ASSERT (s != NULL);
7006
7007 rela.r_offset = (h->root.u.def.value
7008 + h->root.u.def.section->output_section->vma
7009 + h->root.u.def.section->output_offset);
7010 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7011 rela.r_addend = 0;
7012 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7013 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7014 }
7015
7016 #ifdef DEBUG
7017 fprintf (stderr, "\n");
7018 #endif
7019
7020 /* Mark some specially defined symbols as absolute. */
7021 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7022 || (!htab->is_vxworks
7023 && (h == htab->elf.hgot
7024 || strcmp (h->root.root.string,
7025 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7026 sym->st_shndx = SHN_ABS;
7027
7028 return TRUE;
7029 }
7030 \f
7031 static enum elf_reloc_type_class
7032 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7033 {
7034 switch (ELF32_R_TYPE (rela->r_info))
7035 {
7036 case R_PPC_RELATIVE:
7037 return reloc_class_relative;
7038 case R_PPC_REL24:
7039 case R_PPC_ADDR24:
7040 case R_PPC_JMP_SLOT:
7041 return reloc_class_plt;
7042 case R_PPC_COPY:
7043 return reloc_class_copy;
7044 default:
7045 return reloc_class_normal;
7046 }
7047 }
7048 \f
7049 /* Finish up the dynamic sections. */
7050
7051 static bfd_boolean
7052 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7053 struct bfd_link_info *info)
7054 {
7055 asection *sdyn;
7056 asection *splt;
7057 struct ppc_elf_link_hash_table *htab;
7058 bfd_vma got;
7059 bfd * dynobj;
7060
7061 #ifdef DEBUG
7062 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7063 #endif
7064
7065 htab = ppc_elf_hash_table (info);
7066 dynobj = elf_hash_table (info)->dynobj;
7067 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7068 if (htab->is_vxworks)
7069 splt = bfd_get_section_by_name (dynobj, ".plt");
7070 else
7071 splt = NULL;
7072
7073 got = 0;
7074 if (htab->elf.hgot != NULL)
7075 got = (htab->elf.hgot->root.u.def.value
7076 + htab->elf.hgot->root.u.def.section->output_section->vma
7077 + htab->elf.hgot->root.u.def.section->output_offset);
7078
7079 if (htab->elf.dynamic_sections_created)
7080 {
7081 Elf32_External_Dyn *dyncon, *dynconend;
7082
7083 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7084
7085 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7086 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7087 for (; dyncon < dynconend; dyncon++)
7088 {
7089 Elf_Internal_Dyn dyn;
7090 asection *s;
7091
7092 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7093
7094 switch (dyn.d_tag)
7095 {
7096 case DT_PLTGOT:
7097 if (htab->is_vxworks)
7098 s = htab->sgotplt;
7099 else
7100 s = htab->plt;
7101 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7102 break;
7103
7104 case DT_PLTRELSZ:
7105 dyn.d_un.d_val = htab->relplt->size;
7106 break;
7107
7108 case DT_JMPREL:
7109 s = htab->relplt;
7110 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7111 break;
7112
7113 case DT_PPC_GOT:
7114 dyn.d_un.d_ptr = got;
7115 break;
7116
7117 case DT_RELASZ:
7118 if (htab->is_vxworks)
7119 {
7120 if (htab->relplt)
7121 dyn.d_un.d_ptr -= htab->relplt->size;
7122 break;
7123 }
7124 continue;
7125
7126 default:
7127 continue;
7128 }
7129
7130 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7131 }
7132 }
7133
7134 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7135 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7136 if (htab->got != NULL)
7137 {
7138 unsigned char *p = htab->got->contents;
7139 bfd_vma val;
7140
7141 p += htab->elf.hgot->root.u.def.value;
7142 if (htab->plt_type == PLT_OLD)
7143 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7144
7145 val = 0;
7146 if (sdyn != NULL)
7147 val = sdyn->output_section->vma + sdyn->output_offset;
7148 bfd_put_32 (output_bfd, val, p);
7149
7150 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7151 }
7152
7153 /* Fill in the first entry in the VxWorks procedure linkage table. */
7154 if (splt && splt->size > 0)
7155 {
7156 /* Use the right PLT. */
7157 static const bfd_vma *plt_entry = NULL;
7158 plt_entry = info->shared ?
7159 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7160
7161 if (!info->shared)
7162 {
7163 bfd_vma got_value =
7164 (htab->elf.hgot->root.u.def.section->output_section->vma
7165 + htab->elf.hgot->root.u.def.section->output_offset
7166 + htab->elf.hgot->root.u.def.value);
7167 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7168
7169 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7170 splt->contents + 0);
7171 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7172 splt->contents + 4);
7173 }
7174 else
7175 {
7176 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7177 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7178 }
7179 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7180 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7181 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7182 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7183 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7184 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7185
7186 if (! info->shared)
7187 {
7188 Elf_Internal_Rela rela;
7189 bfd_byte *loc;
7190
7191 loc = htab->srelplt2->contents;
7192
7193 /* Output the @ha relocation for the first instruction. */
7194 rela.r_offset = (htab->plt->output_section->vma
7195 + htab->plt->output_offset
7196 + 2);
7197 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7198 rela.r_addend = 0;
7199 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7200 loc += sizeof (Elf32_External_Rela);
7201
7202 /* Output the @l relocation for the second instruction. */
7203 rela.r_offset = (htab->plt->output_section->vma
7204 + htab->plt->output_offset
7205 + 6);
7206 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7207 rela.r_addend = 0;
7208 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7209 loc += sizeof (Elf32_External_Rela);
7210
7211 /* Fix up the remaining relocations. They may have the wrong
7212 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7213 in which symbols were output. */
7214 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7215 {
7216 Elf_Internal_Rela rel;
7217
7218 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7219 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7220 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7221 loc += sizeof (Elf32_External_Rela);
7222
7223 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7224 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7225 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7226 loc += sizeof (Elf32_External_Rela);
7227
7228 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7229 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7230 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7231 loc += sizeof (Elf32_External_Rela);
7232 }
7233 }
7234 }
7235
7236 if (htab->glink != NULL && htab->glink->contents != NULL)
7237 {
7238 unsigned char *p;
7239 unsigned char *endp;
7240 bfd_vma res0;
7241 unsigned int i;
7242
7243 /*
7244 * PIC glink code is the following:
7245 *
7246 * # ith PLT code stub.
7247 * addis 11,30,(plt+(i-1)*4-got)@ha
7248 * lwz 11,(plt+(i-1)*4-got)@l(11)
7249 * mtctr 11
7250 * bctr
7251 *
7252 * # A table of branches, one for each plt entry.
7253 * # The idea is that the plt call stub loads ctr (and r11) with these
7254 * # addresses, so (r11 - res_0) gives the plt index * 4.
7255 * res_0: b PLTresolve
7256 * res_1: b PLTresolve
7257 * .
7258 * # Some number of entries towards the end can be nops
7259 * res_n_m3: nop
7260 * res_n_m2: nop
7261 * res_n_m1:
7262 *
7263 * PLTresolve:
7264 * addis 11,11,(1f-res_0)@ha
7265 * mflr 0
7266 * bcl 20,31,1f
7267 * 1: addi 11,11,(1b-res_0)@l
7268 * mflr 12
7269 * mtlr 0
7270 * sub 11,11,12 # r11 = index * 4
7271 * addis 12,12,(got+4-1b)@ha
7272 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7273 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7274 * mtctr 0
7275 * add 0,11,11
7276 * add 11,0,11 # r11 = index * 12 = reloc offset.
7277 * bctr
7278 */
7279 static const unsigned int pic_plt_resolve[] =
7280 {
7281 ADDIS_11_11,
7282 MFLR_0,
7283 BCL_20_31,
7284 ADDI_11_11,
7285 MFLR_12,
7286 MTLR_0,
7287 SUB_11_11_12,
7288 ADDIS_12_12,
7289 LWZ_0_12,
7290 LWZ_12_12,
7291 MTCTR_0,
7292 ADD_0_11_11,
7293 ADD_11_0_11,
7294 BCTR,
7295 NOP,
7296 NOP
7297 };
7298
7299 static const unsigned int plt_resolve[] =
7300 {
7301 LIS_12,
7302 ADDIS_11_11,
7303 LWZ_0_12,
7304 ADDI_11_11,
7305 MTCTR_0,
7306 ADD_0_11_11,
7307 LWZ_12_12,
7308 ADD_11_0_11,
7309 BCTR,
7310 NOP,
7311 NOP,
7312 NOP,
7313 NOP,
7314 NOP,
7315 NOP,
7316 NOP
7317 };
7318
7319 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7320 abort ();
7321 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7322 abort ();
7323
7324 /* Build the branch table, one for each plt entry (less one),
7325 and perhaps some padding. */
7326 p = htab->glink->contents;
7327 p += htab->glink_pltresolve;
7328 endp = htab->glink->contents;
7329 endp += htab->glink->size - GLINK_PLTRESOLVE;
7330 while (p < endp - 8 * 4)
7331 {
7332 bfd_put_32 (output_bfd, B + endp - p, p);
7333 p += 4;
7334 }
7335 while (p < endp)
7336 {
7337 bfd_put_32 (output_bfd, NOP, p);
7338 p += 4;
7339 }
7340
7341 res0 = (htab->glink_pltresolve
7342 + htab->glink->output_section->vma
7343 + htab->glink->output_offset);
7344
7345 /* Last comes the PLTresolve stub. */
7346 if (info->shared || info->pie)
7347 {
7348 bfd_vma bcl;
7349
7350 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7351 {
7352 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7353 p += 4;
7354 }
7355 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7356
7357 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7358 + htab->glink->output_section->vma
7359 + htab->glink->output_offset);
7360
7361 bfd_put_32 (output_bfd,
7362 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7363 bfd_put_32 (output_bfd,
7364 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7365 bfd_put_32 (output_bfd,
7366 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7367 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7368 {
7369 bfd_put_32 (output_bfd,
7370 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7371 bfd_put_32 (output_bfd,
7372 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7373 }
7374 else
7375 {
7376 bfd_put_32 (output_bfd,
7377 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7378 bfd_put_32 (output_bfd,
7379 LWZ_12_12 + 4, p + 9*4);
7380 }
7381 }
7382 else
7383 {
7384 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7385 {
7386 bfd_put_32 (output_bfd, plt_resolve[i], p);
7387 p += 4;
7388 }
7389 p -= 4 * ARRAY_SIZE (plt_resolve);
7390
7391 bfd_put_32 (output_bfd,
7392 LIS_12 + PPC_HA (got + 4), p + 0*4);
7393 bfd_put_32 (output_bfd,
7394 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7395 bfd_put_32 (output_bfd,
7396 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7397 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7398 {
7399 bfd_put_32 (output_bfd,
7400 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7401 bfd_put_32 (output_bfd,
7402 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7403 }
7404 else
7405 {
7406 bfd_put_32 (output_bfd,
7407 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7408 bfd_put_32 (output_bfd,
7409 LWZ_12_12 + 4, p + 6*4);
7410 }
7411 }
7412 }
7413
7414 return TRUE;
7415 }
7416 \f
7417 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7418 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7419 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7420 #define TARGET_BIG_NAME "elf32-powerpc"
7421 #define ELF_ARCH bfd_arch_powerpc
7422 #define ELF_MACHINE_CODE EM_PPC
7423 #ifdef __QNXTARGET__
7424 #define ELF_MAXPAGESIZE 0x1000
7425 #else
7426 #define ELF_MAXPAGESIZE 0x10000
7427 #endif
7428 #define ELF_MINPAGESIZE 0x1000
7429 #define elf_info_to_howto ppc_elf_info_to_howto
7430
7431 #ifdef EM_CYGNUS_POWERPC
7432 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7433 #endif
7434
7435 #ifdef EM_PPC_OLD
7436 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7437 #endif
7438
7439 #define elf_backend_plt_not_loaded 1
7440 #define elf_backend_can_gc_sections 1
7441 #define elf_backend_can_refcount 1
7442 #define elf_backend_rela_normal 1
7443
7444 #define bfd_elf32_mkobject ppc_elf_mkobject
7445 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7446 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7447 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7448 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7449 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7450
7451 #define elf_backend_object_p ppc_elf_object_p
7452 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7453 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7454 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7455 #define elf_backend_relocate_section ppc_elf_relocate_section
7456 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7457 #define elf_backend_check_relocs ppc_elf_check_relocs
7458 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7459 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7460 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7461 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7462 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7463 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7464 #define elf_backend_fake_sections ppc_elf_fake_sections
7465 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7466 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7467 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7468 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7469 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7470 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7471 #define elf_backend_write_section ppc_elf_write_section
7472 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7473 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7474 #define elf_backend_action_discarded ppc_elf_action_discarded
7475
7476 #include "elf32-target.h"
7477
7478 /* VxWorks Target */
7479
7480 #undef TARGET_LITTLE_SYM
7481 #undef TARGET_LITTLE_NAME
7482
7483 #undef TARGET_BIG_SYM
7484 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7485 #undef TARGET_BIG_NAME
7486 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7487
7488 /* VxWorks uses the elf default section flags for .plt. */
7489 static const struct bfd_elf_special_section *
7490 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7491 {
7492 if (sec->name == NULL)
7493 return NULL;
7494
7495 if (strcmp (sec->name, ".plt") == 0)
7496 return _bfd_elf_get_sec_type_attr (abfd, sec);
7497
7498 return ppc_elf_get_sec_type_attr (abfd, sec);
7499 }
7500
7501 /* Like ppc_elf_link_hash_table_create, but overrides
7502 appropriately for VxWorks. */
7503 static struct bfd_link_hash_table *
7504 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7505 {
7506 struct bfd_link_hash_table *ret;
7507
7508 ret = ppc_elf_link_hash_table_create (abfd);
7509 if (ret)
7510 {
7511 struct ppc_elf_link_hash_table *htab
7512 = (struct ppc_elf_link_hash_table *)ret;
7513 htab->is_vxworks = 1;
7514 htab->plt_type = PLT_VXWORKS;
7515 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7516 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7517 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7518 }
7519 return ret;
7520 }
7521
7522 /* Tweak magic VxWorks symbols as they are loaded. */
7523 static bfd_boolean
7524 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7525 struct bfd_link_info *info,
7526 Elf_Internal_Sym *sym,
7527 const char **namep ATTRIBUTE_UNUSED,
7528 flagword *flagsp ATTRIBUTE_UNUSED,
7529 asection **secp,
7530 bfd_vma *valp)
7531 {
7532 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7533 valp))
7534 return FALSE;
7535
7536 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7537 }
7538
7539 static void
7540 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7541 {
7542 ppc_elf_final_write_processing(abfd, linker);
7543 elf_vxworks_final_write_processing(abfd, linker);
7544 }
7545
7546 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7547 define it. */
7548 #undef elf_backend_want_plt_sym
7549 #define elf_backend_want_plt_sym 1
7550 #undef elf_backend_want_got_plt
7551 #define elf_backend_want_got_plt 1
7552 #undef elf_backend_got_symbol_offset
7553 #define elf_backend_got_symbol_offset 0
7554 #undef elf_backend_plt_not_loaded
7555 #define elf_backend_plt_not_loaded 0
7556 #undef elf_backend_plt_readonly
7557 #define elf_backend_plt_readonly 1
7558 #undef elf_backend_got_header_size
7559 #define elf_backend_got_header_size 12
7560
7561 #undef bfd_elf32_bfd_link_hash_table_create
7562 #define bfd_elf32_bfd_link_hash_table_create \
7563 ppc_elf_vxworks_link_hash_table_create
7564 #undef elf_backend_add_symbol_hook
7565 #define elf_backend_add_symbol_hook \
7566 ppc_elf_vxworks_add_symbol_hook
7567 #undef elf_backend_link_output_symbol_hook
7568 #define elf_backend_link_output_symbol_hook \
7569 elf_vxworks_link_output_symbol_hook
7570 #undef elf_backend_final_write_processing
7571 #define elf_backend_final_write_processing \
7572 ppc_elf_vxworks_final_write_processing
7573 #undef elf_backend_get_sec_type_attr
7574 #define elf_backend_get_sec_type_attr \
7575 ppc_elf_vxworks_get_sec_type_attr
7576 #undef elf_backend_emit_relocs
7577 #define elf_backend_emit_relocs \
7578 elf_vxworks_emit_relocs
7579
7580 #undef elf32_bed
7581 #define elf32_bed ppc_elf_vxworks_bed
7582
7583 #include "elf32-target.h"
GDB Binutils - Deliverables
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