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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, 2006, 2007 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24 /* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc.h"
36 #include "elf32-ppc.h"
37 #include "elf-vxworks.h"
38
39 /* RELA relocations are used here. */
40
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
46 /* Branch prediction bit for branch taken relocs. */
47 #define BRANCH_PREDICT_BIT 0x200000
48 /* Mask to set RA in memory instructions. */
49 #define RA_REGISTER_MASK 0x001f0000
50 /* Value to shift register by to insert RA. */
51 #define RA_REGISTER_SHIFT 16
52
53 /* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
57 /* For old-style PLT. */
58 /* The number of single-slot PLT entries (the rest use two slots). */
59 #define PLT_NUM_SINGLE_ENTRIES 8192
60
61 /* For new-style .glink and .plt. */
62 #define GLINK_PLTRESOLVE 16*4
63 #define GLINK_ENTRY_SIZE 4*4
64
65 /* VxWorks uses its own plt layout, filled in by the static linker. */
66
67 /* The standard VxWorks PLT entry. */
68 #define VXWORKS_PLT_ENTRY_SIZE 32
69 static const bfd_vma ppc_elf_vxworks_plt_entry
70 [VXWORKS_PLT_ENTRY_SIZE / 4] =
71 {
72 0x3d800000, /* lis r12,0 */
73 0x818c0000, /* lwz r12,0(r12) */
74 0x7d8903a6, /* mtctr r12 */
75 0x4e800420, /* bctr */
76 0x39600000, /* li r11,0 */
77 0x48000000, /* b 14 <.PLT0resolve+0x4> */
78 0x60000000, /* nop */
79 0x60000000, /* nop */
80 };
81 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
82 [VXWORKS_PLT_ENTRY_SIZE / 4] =
83 {
84 0x3d9e0000, /* addis r12,r30,0 */
85 0x818c0000, /* lwz r12,0(r12) */
86 0x7d8903a6, /* mtctr r12 */
87 0x4e800420, /* bctr */
88 0x39600000, /* li r11,0 */
89 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
90 0x60000000, /* nop */
91 0x60000000, /* nop */
92 };
93
94 /* The initial VxWorks PLT entry. */
95 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
96 static const bfd_vma ppc_elf_vxworks_plt0_entry
97 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
98 {
99 0x3d800000, /* lis r12,0 */
100 0x398c0000, /* addi r12,r12,0 */
101 0x800c0008, /* lwz r0,8(r12) */
102 0x7c0903a6, /* mtctr r0 */
103 0x818c0004, /* lwz r12,4(r12) */
104 0x4e800420, /* bctr */
105 0x60000000, /* nop */
106 0x60000000, /* nop */
107 };
108 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
109 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
110 {
111 0x819e0008, /* lwz r12,8(r30) */
112 0x7d8903a6, /* mtctr r12 */
113 0x819e0004, /* lwz r12,4(r30) */
114 0x4e800420, /* bctr */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 };
120
121 /* For executables, we have some additional relocations in
122 .rela.plt.unloaded, for the kernel loader. */
123
124 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
125 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
126 /* The number of relocations in the PLTResolve slot. */
127 #define VXWORKS_PLTRESOLVE_RELOCS 2
128 /* The number of relocations in the PLTResolve slot when when creating
129 a shared library. */
130 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
131
132 /* Some instructions. */
133 #define ADDIS_11_11 0x3d6b0000
134 #define ADDIS_11_30 0x3d7e0000
135 #define ADDIS_12_12 0x3d8c0000
136 #define ADDI_11_11 0x396b0000
137 #define ADD_0_11_11 0x7c0b5a14
138 #define ADD_11_0_11 0x7d605a14
139 #define B 0x48000000
140 #define BCL_20_31 0x429f0005
141 #define BCTR 0x4e800420
142 #define LIS_11 0x3d600000
143 #define LIS_12 0x3d800000
144 #define LWZU_0_12 0x840c0000
145 #define LWZ_0_12 0x800c0000
146 #define LWZ_11_11 0x816b0000
147 #define LWZ_11_30 0x817e0000
148 #define LWZ_12_12 0x818c0000
149 #define MFLR_0 0x7c0802a6
150 #define MFLR_12 0x7d8802a6
151 #define MTCTR_0 0x7c0903a6
152 #define MTCTR_11 0x7d6903a6
153 #define MTLR_0 0x7c0803a6
154 #define NOP 0x60000000
155 #define SUB_11_11_12 0x7d6c5850
156
157 /* Offset of tp and dtp pointers from start of TLS block. */
158 #define TP_OFFSET 0x7000
159 #define DTP_OFFSET 0x8000
160 \f
161 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
162
163 static reloc_howto_type ppc_elf_howto_raw[] = {
164 /* This reloc does nothing. */
165 HOWTO (R_PPC_NONE, /* type */
166 0, /* rightshift */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
168 32, /* bitsize */
169 FALSE, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_PPC_NONE", /* name */
174 FALSE, /* partial_inplace */
175 0, /* src_mask */
176 0, /* dst_mask */
177 FALSE), /* pcrel_offset */
178
179 /* A standard 32 bit relocation. */
180 HOWTO (R_PPC_ADDR32, /* type */
181 0, /* rightshift */
182 2, /* size (0 = byte, 1 = short, 2 = long) */
183 32, /* bitsize */
184 FALSE, /* pc_relative */
185 0, /* bitpos */
186 complain_overflow_bitfield, /* complain_on_overflow */
187 bfd_elf_generic_reloc, /* special_function */
188 "R_PPC_ADDR32", /* name */
189 FALSE, /* partial_inplace */
190 0, /* src_mask */
191 0xffffffff, /* dst_mask */
192 FALSE), /* pcrel_offset */
193
194 /* An absolute 26 bit branch; the lower two bits must be zero.
195 FIXME: we don't check that, we just clear them. */
196 HOWTO (R_PPC_ADDR24, /* type */
197 0, /* rightshift */
198 2, /* size (0 = byte, 1 = short, 2 = long) */
199 26, /* bitsize */
200 FALSE, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_bitfield, /* complain_on_overflow */
203 bfd_elf_generic_reloc, /* special_function */
204 "R_PPC_ADDR24", /* name */
205 FALSE, /* partial_inplace */
206 0, /* src_mask */
207 0x3fffffc, /* dst_mask */
208 FALSE), /* pcrel_offset */
209
210 /* A standard 16 bit relocation. */
211 HOWTO (R_PPC_ADDR16, /* type */
212 0, /* rightshift */
213 1, /* size (0 = byte, 1 = short, 2 = long) */
214 16, /* bitsize */
215 FALSE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_bitfield, /* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_PPC_ADDR16", /* name */
220 FALSE, /* partial_inplace */
221 0, /* src_mask */
222 0xffff, /* dst_mask */
223 FALSE), /* pcrel_offset */
224
225 /* A 16 bit relocation without overflow. */
226 HOWTO (R_PPC_ADDR16_LO, /* type */
227 0, /* rightshift */
228 1, /* size (0 = byte, 1 = short, 2 = long) */
229 16, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont,/* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_PPC_ADDR16_LO", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0xffff, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* The high order 16 bits of an address. */
241 HOWTO (R_PPC_ADDR16_HI, /* type */
242 16, /* rightshift */
243 1, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC_ADDR16_HI", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0xffff, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* The high order 16 bits of an address, plus 1 if the contents of
256 the low 16 bits, treated as a signed number, is negative. */
257 HOWTO (R_PPC_ADDR16_HA, /* type */
258 16, /* rightshift */
259 1, /* size (0 = byte, 1 = short, 2 = long) */
260 16, /* bitsize */
261 FALSE, /* pc_relative */
262 0, /* bitpos */
263 complain_overflow_dont, /* complain_on_overflow */
264 ppc_elf_addr16_ha_reloc, /* special_function */
265 "R_PPC_ADDR16_HA", /* name */
266 FALSE, /* partial_inplace */
267 0, /* src_mask */
268 0xffff, /* dst_mask */
269 FALSE), /* pcrel_offset */
270
271 /* An absolute 16 bit branch; the lower two bits must be zero.
272 FIXME: we don't check that, we just clear them. */
273 HOWTO (R_PPC_ADDR14, /* type */
274 0, /* rightshift */
275 2, /* size (0 = byte, 1 = short, 2 = long) */
276 16, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_bitfield, /* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_PPC_ADDR14", /* name */
282 FALSE, /* partial_inplace */
283 0, /* src_mask */
284 0xfffc, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* An absolute 16 bit branch, for which bit 10 should be set to
288 indicate that the branch is expected to be taken. The lower two
289 bits must be zero. */
290 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 16, /* bitsize */
294 FALSE, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_bitfield, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC_ADDR14_BRTAKEN",/* name */
299 FALSE, /* partial_inplace */
300 0, /* src_mask */
301 0xfffc, /* dst_mask */
302 FALSE), /* pcrel_offset */
303
304 /* An absolute 16 bit branch, for which bit 10 should be set to
305 indicate that the branch is not expected to be taken. The lower
306 two bits must be zero. */
307 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
308 0, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 16, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_PPC_ADDR14_BRNTAKEN",/* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0xfffc, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* A relative 26 bit branch; the lower two bits must be zero. */
322 HOWTO (R_PPC_REL24, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 26, /* bitsize */
326 TRUE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_signed, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC_REL24", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0x3fffffc, /* dst_mask */
334 TRUE), /* pcrel_offset */
335
336 /* A relative 16 bit branch; the lower two bits must be zero. */
337 HOWTO (R_PPC_REL14, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 TRUE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_signed, /* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_PPC_REL14", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0xfffc, /* dst_mask */
349 TRUE), /* pcrel_offset */
350
351 /* A relative 16 bit branch. Bit 10 should be set to indicate that
352 the branch is expected to be taken. The lower two bits must be
353 zero. */
354 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 TRUE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_signed, /* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_PPC_REL14_BRTAKEN", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0xfffc, /* dst_mask */
366 TRUE), /* pcrel_offset */
367
368 /* A relative 16 bit branch. Bit 10 should be set to indicate that
369 the branch is not expected to be taken. The lower two bits must
370 be zero. */
371 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
372 0, /* rightshift */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 TRUE, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_signed, /* complain_on_overflow */
378 bfd_elf_generic_reloc, /* special_function */
379 "R_PPC_REL14_BRNTAKEN",/* name */
380 FALSE, /* partial_inplace */
381 0, /* src_mask */
382 0xfffc, /* dst_mask */
383 TRUE), /* pcrel_offset */
384
385 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
386 symbol. */
387 HOWTO (R_PPC_GOT16, /* type */
388 0, /* rightshift */
389 1, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
391 FALSE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_signed, /* complain_on_overflow */
394 bfd_elf_generic_reloc, /* special_function */
395 "R_PPC_GOT16", /* name */
396 FALSE, /* partial_inplace */
397 0, /* src_mask */
398 0xffff, /* dst_mask */
399 FALSE), /* pcrel_offset */
400
401 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
402 the symbol. */
403 HOWTO (R_PPC_GOT16_LO, /* type */
404 0, /* rightshift */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_dont, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* special_function */
411 "R_PPC_GOT16_LO", /* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0xffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
418 the symbol. */
419 HOWTO (R_PPC_GOT16_HI, /* type */
420 16, /* rightshift */
421 1, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 FALSE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_bitfield, /* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 "R_PPC_GOT16_HI", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0xffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
432
433 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
434 the symbol. */
435 HOWTO (R_PPC_GOT16_HA, /* type */
436 16, /* rightshift */
437 1, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 FALSE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_bitfield, /* complain_on_overflow */
442 ppc_elf_addr16_ha_reloc, /* special_function */
443 "R_PPC_GOT16_HA", /* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0xffff, /* dst_mask */
447 FALSE), /* pcrel_offset */
448
449 /* Like R_PPC_REL24, but referring to the procedure linkage table
450 entry for the symbol. */
451 HOWTO (R_PPC_PLTREL24, /* type */
452 0, /* rightshift */
453 2, /* size (0 = byte, 1 = short, 2 = long) */
454 26, /* bitsize */
455 TRUE, /* pc_relative */
456 0, /* bitpos */
457 complain_overflow_signed, /* complain_on_overflow */
458 bfd_elf_generic_reloc, /* special_function */
459 "R_PPC_PLTREL24", /* name */
460 FALSE, /* partial_inplace */
461 0, /* src_mask */
462 0x3fffffc, /* dst_mask */
463 TRUE), /* pcrel_offset */
464
465 /* This is used only by the dynamic linker. The symbol should exist
466 both in the object being run and in some shared library. The
467 dynamic linker copies the data addressed by the symbol from the
468 shared library into the object, because the object being
469 run has to have the data at some particular address. */
470 HOWTO (R_PPC_COPY, /* type */
471 0, /* rightshift */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
473 32, /* bitsize */
474 FALSE, /* pc_relative */
475 0, /* bitpos */
476 complain_overflow_bitfield, /* complain_on_overflow */
477 bfd_elf_generic_reloc, /* special_function */
478 "R_PPC_COPY", /* name */
479 FALSE, /* partial_inplace */
480 0, /* src_mask */
481 0, /* dst_mask */
482 FALSE), /* pcrel_offset */
483
484 /* Like R_PPC_ADDR32, but used when setting global offset table
485 entries. */
486 HOWTO (R_PPC_GLOB_DAT, /* type */
487 0, /* rightshift */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
489 32, /* bitsize */
490 FALSE, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_bitfield, /* complain_on_overflow */
493 bfd_elf_generic_reloc, /* special_function */
494 "R_PPC_GLOB_DAT", /* name */
495 FALSE, /* partial_inplace */
496 0, /* src_mask */
497 0xffffffff, /* dst_mask */
498 FALSE), /* pcrel_offset */
499
500 /* Marks a procedure linkage table entry for a symbol. */
501 HOWTO (R_PPC_JMP_SLOT, /* type */
502 0, /* rightshift */
503 2, /* size (0 = byte, 1 = short, 2 = long) */
504 32, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_bitfield, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_PPC_JMP_SLOT", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Used only by the dynamic linker. When the object is run, this
516 longword is set to the load address of the object, plus the
517 addend. */
518 HOWTO (R_PPC_RELATIVE, /* type */
519 0, /* rightshift */
520 2, /* size (0 = byte, 1 = short, 2 = long) */
521 32, /* bitsize */
522 FALSE, /* pc_relative */
523 0, /* bitpos */
524 complain_overflow_bitfield, /* complain_on_overflow */
525 bfd_elf_generic_reloc, /* special_function */
526 "R_PPC_RELATIVE", /* name */
527 FALSE, /* partial_inplace */
528 0, /* src_mask */
529 0xffffffff, /* dst_mask */
530 FALSE), /* pcrel_offset */
531
532 /* Like R_PPC_REL24, but uses the value of the symbol within the
533 object rather than the final value. Normally used for
534 _GLOBAL_OFFSET_TABLE_. */
535 HOWTO (R_PPC_LOCAL24PC, /* type */
536 0, /* rightshift */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
538 26, /* bitsize */
539 TRUE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_signed, /* complain_on_overflow */
542 bfd_elf_generic_reloc, /* special_function */
543 "R_PPC_LOCAL24PC", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 0x3fffffc, /* dst_mask */
547 TRUE), /* pcrel_offset */
548
549 /* Like R_PPC_ADDR32, but may be unaligned. */
550 HOWTO (R_PPC_UADDR32, /* type */
551 0, /* rightshift */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
553 32, /* bitsize */
554 FALSE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_bitfield, /* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_PPC_UADDR32", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 0xffffffff, /* dst_mask */
562 FALSE), /* pcrel_offset */
563
564 /* Like R_PPC_ADDR16, but may be unaligned. */
565 HOWTO (R_PPC_UADDR16, /* type */
566 0, /* rightshift */
567 1, /* size (0 = byte, 1 = short, 2 = long) */
568 16, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_bitfield, /* complain_on_overflow */
572 bfd_elf_generic_reloc, /* special_function */
573 "R_PPC_UADDR16", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0xffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* 32-bit PC relative */
580 HOWTO (R_PPC_REL32, /* type */
581 0, /* rightshift */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
583 32, /* bitsize */
584 TRUE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_bitfield, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 "R_PPC_REL32", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0xffffffff, /* dst_mask */
592 TRUE), /* pcrel_offset */
593
594 /* 32-bit relocation to the symbol's procedure linkage table.
595 FIXME: not supported. */
596 HOWTO (R_PPC_PLT32, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_PPC_PLT32", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
611 FIXME: not supported. */
612 HOWTO (R_PPC_PLTREL32, /* type */
613 0, /* rightshift */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
615 32, /* bitsize */
616 TRUE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_bitfield, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC_PLTREL32", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 0, /* dst_mask */
624 TRUE), /* pcrel_offset */
625
626 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
627 the symbol. */
628 HOWTO (R_PPC_PLT16_LO, /* type */
629 0, /* rightshift */
630 1, /* size (0 = byte, 1 = short, 2 = long) */
631 16, /* bitsize */
632 FALSE, /* pc_relative */
633 0, /* bitpos */
634 complain_overflow_dont, /* complain_on_overflow */
635 bfd_elf_generic_reloc, /* special_function */
636 "R_PPC_PLT16_LO", /* name */
637 FALSE, /* partial_inplace */
638 0, /* src_mask */
639 0xffff, /* dst_mask */
640 FALSE), /* pcrel_offset */
641
642 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
643 the symbol. */
644 HOWTO (R_PPC_PLT16_HI, /* type */
645 16, /* rightshift */
646 1, /* size (0 = byte, 1 = short, 2 = long) */
647 16, /* bitsize */
648 FALSE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_bitfield, /* complain_on_overflow */
651 bfd_elf_generic_reloc, /* special_function */
652 "R_PPC_PLT16_HI", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffff, /* dst_mask */
656 FALSE), /* pcrel_offset */
657
658 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
659 the symbol. */
660 HOWTO (R_PPC_PLT16_HA, /* type */
661 16, /* rightshift */
662 1, /* size (0 = byte, 1 = short, 2 = long) */
663 16, /* bitsize */
664 FALSE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_bitfield, /* complain_on_overflow */
667 ppc_elf_addr16_ha_reloc, /* special_function */
668 "R_PPC_PLT16_HA", /* name */
669 FALSE, /* partial_inplace */
670 0, /* src_mask */
671 0xffff, /* dst_mask */
672 FALSE), /* pcrel_offset */
673
674 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
675 small data items. */
676 HOWTO (R_PPC_SDAREL16, /* type */
677 0, /* rightshift */
678 1, /* size (0 = byte, 1 = short, 2 = long) */
679 16, /* bitsize */
680 FALSE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_signed, /* complain_on_overflow */
683 bfd_elf_generic_reloc, /* special_function */
684 "R_PPC_SDAREL16", /* name */
685 FALSE, /* partial_inplace */
686 0, /* src_mask */
687 0xffff, /* dst_mask */
688 FALSE), /* pcrel_offset */
689
690 /* 16-bit section relative relocation. */
691 HOWTO (R_PPC_SECTOFF, /* type */
692 0, /* rightshift */
693 1, /* size (0 = byte, 1 = short, 2 = long) */
694 16, /* bitsize */
695 FALSE, /* pc_relative */
696 0, /* bitpos */
697 complain_overflow_bitfield, /* complain_on_overflow */
698 bfd_elf_generic_reloc, /* special_function */
699 "R_PPC_SECTOFF", /* name */
700 FALSE, /* partial_inplace */
701 0, /* src_mask */
702 0xffff, /* dst_mask */
703 FALSE), /* pcrel_offset */
704
705 /* 16-bit lower half section relative relocation. */
706 HOWTO (R_PPC_SECTOFF_LO, /* type */
707 0, /* rightshift */
708 1, /* size (0 = byte, 1 = short, 2 = long) */
709 16, /* bitsize */
710 FALSE, /* pc_relative */
711 0, /* bitpos */
712 complain_overflow_dont, /* complain_on_overflow */
713 bfd_elf_generic_reloc, /* special_function */
714 "R_PPC_SECTOFF_LO", /* name */
715 FALSE, /* partial_inplace */
716 0, /* src_mask */
717 0xffff, /* dst_mask */
718 FALSE), /* pcrel_offset */
719
720 /* 16-bit upper half section relative relocation. */
721 HOWTO (R_PPC_SECTOFF_HI, /* type */
722 16, /* rightshift */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
724 16, /* bitsize */
725 FALSE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_bitfield, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 "R_PPC_SECTOFF_HI", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0xffff, /* dst_mask */
733 FALSE), /* pcrel_offset */
734
735 /* 16-bit upper half adjusted section relative relocation. */
736 HOWTO (R_PPC_SECTOFF_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_bitfield, /* complain_on_overflow */
743 ppc_elf_addr16_ha_reloc, /* special_function */
744 "R_PPC_SECTOFF_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* Marker reloc for TLS. */
751 HOWTO (R_PPC_TLS,
752 0, /* rightshift */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
754 32, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 "R_PPC_TLS", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Computes the load module index of the load module that contains the
766 definition of its TLS sym. */
767 HOWTO (R_PPC_DTPMOD32,
768 0, /* rightshift */
769 2, /* size (0 = byte, 1 = short, 2 = long) */
770 32, /* bitsize */
771 FALSE, /* pc_relative */
772 0, /* bitpos */
773 complain_overflow_dont, /* complain_on_overflow */
774 ppc_elf_unhandled_reloc, /* special_function */
775 "R_PPC_DTPMOD32", /* name */
776 FALSE, /* partial_inplace */
777 0, /* src_mask */
778 0xffffffff, /* dst_mask */
779 FALSE), /* pcrel_offset */
780
781 /* Computes a dtv-relative displacement, the difference between the value
782 of sym+add and the base address of the thread-local storage block that
783 contains the definition of sym, minus 0x8000. */
784 HOWTO (R_PPC_DTPREL32,
785 0, /* rightshift */
786 2, /* size (0 = byte, 1 = short, 2 = long) */
787 32, /* bitsize */
788 FALSE, /* pc_relative */
789 0, /* bitpos */
790 complain_overflow_dont, /* complain_on_overflow */
791 ppc_elf_unhandled_reloc, /* special_function */
792 "R_PPC_DTPREL32", /* name */
793 FALSE, /* partial_inplace */
794 0, /* src_mask */
795 0xffffffff, /* dst_mask */
796 FALSE), /* pcrel_offset */
797
798 /* A 16 bit dtprel reloc. */
799 HOWTO (R_PPC_DTPREL16,
800 0, /* rightshift */
801 1, /* size (0 = byte, 1 = short, 2 = long) */
802 16, /* bitsize */
803 FALSE, /* pc_relative */
804 0, /* bitpos */
805 complain_overflow_signed, /* complain_on_overflow */
806 ppc_elf_unhandled_reloc, /* special_function */
807 "R_PPC_DTPREL16", /* name */
808 FALSE, /* partial_inplace */
809 0, /* src_mask */
810 0xffff, /* dst_mask */
811 FALSE), /* pcrel_offset */
812
813 /* Like DTPREL16, but no overflow. */
814 HOWTO (R_PPC_DTPREL16_LO,
815 0, /* rightshift */
816 1, /* size (0 = byte, 1 = short, 2 = long) */
817 16, /* bitsize */
818 FALSE, /* pc_relative */
819 0, /* bitpos */
820 complain_overflow_dont, /* complain_on_overflow */
821 ppc_elf_unhandled_reloc, /* special_function */
822 "R_PPC_DTPREL16_LO", /* name */
823 FALSE, /* partial_inplace */
824 0, /* src_mask */
825 0xffff, /* dst_mask */
826 FALSE), /* pcrel_offset */
827
828 /* Like DTPREL16_LO, but next higher group of 16 bits. */
829 HOWTO (R_PPC_DTPREL16_HI,
830 16, /* rightshift */
831 1, /* size (0 = byte, 1 = short, 2 = long) */
832 16, /* bitsize */
833 FALSE, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_dont, /* complain_on_overflow */
836 ppc_elf_unhandled_reloc, /* special_function */
837 "R_PPC_DTPREL16_HI", /* name */
838 FALSE, /* partial_inplace */
839 0, /* src_mask */
840 0xffff, /* dst_mask */
841 FALSE), /* pcrel_offset */
842
843 /* Like DTPREL16_HI, but adjust for low 16 bits. */
844 HOWTO (R_PPC_DTPREL16_HA,
845 16, /* rightshift */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
847 16, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 ppc_elf_unhandled_reloc, /* special_function */
852 "R_PPC_DTPREL16_HA", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* Computes a tp-relative displacement, the difference between the value of
859 sym+add and the value of the thread pointer (r13). */
860 HOWTO (R_PPC_TPREL32,
861 0, /* rightshift */
862 2, /* size (0 = byte, 1 = short, 2 = long) */
863 32, /* bitsize */
864 FALSE, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_dont, /* complain_on_overflow */
867 ppc_elf_unhandled_reloc, /* special_function */
868 "R_PPC_TPREL32", /* name */
869 FALSE, /* partial_inplace */
870 0, /* src_mask */
871 0xffffffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 /* A 16 bit tprel reloc. */
875 HOWTO (R_PPC_TPREL16,
876 0, /* rightshift */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
878 16, /* bitsize */
879 FALSE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_signed, /* complain_on_overflow */
882 ppc_elf_unhandled_reloc, /* special_function */
883 "R_PPC_TPREL16", /* name */
884 FALSE, /* partial_inplace */
885 0, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* Like TPREL16, but no overflow. */
890 HOWTO (R_PPC_TPREL16_LO,
891 0, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc_elf_unhandled_reloc, /* special_function */
898 "R_PPC_TPREL16_LO", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like TPREL16_LO, but next higher group of 16 bits. */
905 HOWTO (R_PPC_TPREL16_HI,
906 16, /* rightshift */
907 1, /* size (0 = byte, 1 = short, 2 = long) */
908 16, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 ppc_elf_unhandled_reloc, /* special_function */
913 "R_PPC_TPREL16_HI", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 0xffff, /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* Like TPREL16_HI, but adjust for low 16 bits. */
920 HOWTO (R_PPC_TPREL16_HA,
921 16, /* rightshift */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
923 16, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 ppc_elf_unhandled_reloc, /* special_function */
928 "R_PPC_TPREL16_HA", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
935 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
936 to the first entry. */
937 HOWTO (R_PPC_GOT_TLSGD16,
938 0, /* rightshift */
939 1, /* size (0 = byte, 1 = short, 2 = long) */
940 16, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_signed, /* complain_on_overflow */
944 ppc_elf_unhandled_reloc, /* special_function */
945 "R_PPC_GOT_TLSGD16", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 0xffff, /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* Like GOT_TLSGD16, but no overflow. */
952 HOWTO (R_PPC_GOT_TLSGD16_LO,
953 0, /* rightshift */
954 1, /* size (0 = byte, 1 = short, 2 = long) */
955 16, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc_elf_unhandled_reloc, /* special_function */
960 "R_PPC_GOT_TLSGD16_LO", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 0xffff, /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
967 HOWTO (R_PPC_GOT_TLSGD16_HI,
968 16, /* rightshift */
969 1, /* size (0 = byte, 1 = short, 2 = long) */
970 16, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont, /* complain_on_overflow */
974 ppc_elf_unhandled_reloc, /* special_function */
975 "R_PPC_GOT_TLSGD16_HI", /* name */
976 FALSE, /* partial_inplace */
977 0, /* src_mask */
978 0xffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
982 HOWTO (R_PPC_GOT_TLSGD16_HA,
983 16, /* rightshift */
984 1, /* size (0 = byte, 1 = short, 2 = long) */
985 16, /* bitsize */
986 FALSE, /* pc_relative */
987 0, /* bitpos */
988 complain_overflow_dont, /* complain_on_overflow */
989 ppc_elf_unhandled_reloc, /* special_function */
990 "R_PPC_GOT_TLSGD16_HA", /* name */
991 FALSE, /* partial_inplace */
992 0, /* src_mask */
993 0xffff, /* dst_mask */
994 FALSE), /* pcrel_offset */
995
996 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
997 with values (sym+add)@dtpmod and zero, and computes the offset to the
998 first entry. */
999 HOWTO (R_PPC_GOT_TLSLD16,
1000 0, /* rightshift */
1001 1, /* size (0 = byte, 1 = short, 2 = long) */
1002 16, /* bitsize */
1003 FALSE, /* pc_relative */
1004 0, /* bitpos */
1005 complain_overflow_signed, /* complain_on_overflow */
1006 ppc_elf_unhandled_reloc, /* special_function */
1007 "R_PPC_GOT_TLSLD16", /* name */
1008 FALSE, /* partial_inplace */
1009 0, /* src_mask */
1010 0xffff, /* dst_mask */
1011 FALSE), /* pcrel_offset */
1012
1013 /* Like GOT_TLSLD16, but no overflow. */
1014 HOWTO (R_PPC_GOT_TLSLD16_LO,
1015 0, /* rightshift */
1016 1, /* size (0 = byte, 1 = short, 2 = long) */
1017 16, /* bitsize */
1018 FALSE, /* pc_relative */
1019 0, /* bitpos */
1020 complain_overflow_dont, /* complain_on_overflow */
1021 ppc_elf_unhandled_reloc, /* special_function */
1022 "R_PPC_GOT_TLSLD16_LO", /* name */
1023 FALSE, /* partial_inplace */
1024 0, /* src_mask */
1025 0xffff, /* dst_mask */
1026 FALSE), /* pcrel_offset */
1027
1028 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1029 HOWTO (R_PPC_GOT_TLSLD16_HI,
1030 16, /* rightshift */
1031 1, /* size (0 = byte, 1 = short, 2 = long) */
1032 16, /* bitsize */
1033 FALSE, /* pc_relative */
1034 0, /* bitpos */
1035 complain_overflow_dont, /* complain_on_overflow */
1036 ppc_elf_unhandled_reloc, /* special_function */
1037 "R_PPC_GOT_TLSLD16_HI", /* name */
1038 FALSE, /* partial_inplace */
1039 0, /* src_mask */
1040 0xffff, /* dst_mask */
1041 FALSE), /* pcrel_offset */
1042
1043 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1044 HOWTO (R_PPC_GOT_TLSLD16_HA,
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont, /* complain_on_overflow */
1051 ppc_elf_unhandled_reloc, /* special_function */
1052 "R_PPC_GOT_TLSLD16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1059 the offset to the entry. */
1060 HOWTO (R_PPC_GOT_DTPREL16,
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_signed, /* complain_on_overflow */
1067 ppc_elf_unhandled_reloc, /* special_function */
1068 "R_PPC_GOT_DTPREL16", /* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xffff, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like GOT_DTPREL16, but no overflow. */
1075 HOWTO (R_PPC_GOT_DTPREL16_LO,
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_dont, /* complain_on_overflow */
1082 ppc_elf_unhandled_reloc, /* special_function */
1083 "R_PPC_GOT_DTPREL16_LO", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xffff, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1090 HOWTO (R_PPC_GOT_DTPREL16_HI,
1091 16, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont, /* complain_on_overflow */
1097 ppc_elf_unhandled_reloc, /* special_function */
1098 "R_PPC_GOT_DTPREL16_HI", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xffff, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1105 HOWTO (R_PPC_GOT_DTPREL16_HA,
1106 16, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc_elf_unhandled_reloc, /* special_function */
1113 "R_PPC_GOT_DTPREL16_HA", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xffff, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1120 offset to the entry. */
1121 HOWTO (R_PPC_GOT_TPREL16,
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_signed, /* complain_on_overflow */
1128 ppc_elf_unhandled_reloc, /* special_function */
1129 "R_PPC_GOT_TPREL16", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xffff, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like GOT_TPREL16, but no overflow. */
1136 HOWTO (R_PPC_GOT_TPREL16_LO,
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc_elf_unhandled_reloc, /* special_function */
1144 "R_PPC_GOT_TPREL16_LO", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xffff, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1151 HOWTO (R_PPC_GOT_TPREL16_HI,
1152 16, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_dont, /* complain_on_overflow */
1158 ppc_elf_unhandled_reloc, /* special_function */
1159 "R_PPC_GOT_TPREL16_HI", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xffff, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1166 HOWTO (R_PPC_GOT_TPREL16_HA,
1167 16, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc_elf_unhandled_reloc, /* special_function */
1174 "R_PPC_GOT_TPREL16_HA", /* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xffff, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* The remaining relocs are from the Embedded ELF ABI, and are not
1181 in the SVR4 ELF ABI. */
1182
1183 /* 32 bit value resulting from the addend minus the symbol. */
1184 HOWTO (R_PPC_EMB_NADDR32, /* type */
1185 0, /* rightshift */
1186 2, /* size (0 = byte, 1 = short, 2 = long) */
1187 32, /* bitsize */
1188 FALSE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_bitfield, /* complain_on_overflow */
1191 bfd_elf_generic_reloc, /* special_function */
1192 "R_PPC_EMB_NADDR32", /* name */
1193 FALSE, /* partial_inplace */
1194 0, /* src_mask */
1195 0xffffffff, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1197
1198 /* 16 bit value resulting from the addend minus the symbol. */
1199 HOWTO (R_PPC_EMB_NADDR16, /* type */
1200 0, /* rightshift */
1201 1, /* size (0 = byte, 1 = short, 2 = long) */
1202 16, /* bitsize */
1203 FALSE, /* pc_relative */
1204 0, /* bitpos */
1205 complain_overflow_bitfield, /* complain_on_overflow */
1206 bfd_elf_generic_reloc, /* special_function */
1207 "R_PPC_EMB_NADDR16", /* name */
1208 FALSE, /* partial_inplace */
1209 0, /* src_mask */
1210 0xffff, /* dst_mask */
1211 FALSE), /* pcrel_offset */
1212
1213 /* 16 bit value resulting from the addend minus the symbol. */
1214 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1215 0, /* rightshift */
1216 1, /* size (0 = byte, 1 = short, 2 = long) */
1217 16, /* bitsize */
1218 FALSE, /* pc_relative */
1219 0, /* bitpos */
1220 complain_overflow_dont,/* complain_on_overflow */
1221 bfd_elf_generic_reloc, /* special_function */
1222 "R_PPC_EMB_ADDR16_LO", /* name */
1223 FALSE, /* partial_inplace */
1224 0, /* src_mask */
1225 0xffff, /* dst_mask */
1226 FALSE), /* pcrel_offset */
1227
1228 /* The high order 16 bits of the addend minus the symbol. */
1229 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1230 16, /* rightshift */
1231 1, /* size (0 = byte, 1 = short, 2 = long) */
1232 16, /* bitsize */
1233 FALSE, /* pc_relative */
1234 0, /* bitpos */
1235 complain_overflow_dont, /* complain_on_overflow */
1236 bfd_elf_generic_reloc, /* special_function */
1237 "R_PPC_EMB_NADDR16_HI", /* name */
1238 FALSE, /* partial_inplace */
1239 0, /* src_mask */
1240 0xffff, /* dst_mask */
1241 FALSE), /* pcrel_offset */
1242
1243 /* The high order 16 bits of the result of the addend minus the address,
1244 plus 1 if the contents of the low 16 bits, treated as a signed number,
1245 is negative. */
1246 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1247 16, /* rightshift */
1248 1, /* size (0 = byte, 1 = short, 2 = long) */
1249 16, /* bitsize */
1250 FALSE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_dont, /* complain_on_overflow */
1253 ppc_elf_addr16_ha_reloc, /* special_function */
1254 "R_PPC_EMB_NADDR16_HA", /* name */
1255 FALSE, /* partial_inplace */
1256 0, /* src_mask */
1257 0xffff, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1259
1260 /* 16 bit value resulting from allocating a 4 byte word to hold an
1261 address in the .sdata section, and returning the offset from
1262 _SDA_BASE_ for that relocation. */
1263 HOWTO (R_PPC_EMB_SDAI16, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_bitfield, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_PPC_EMB_SDAI16", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xffff, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* 16 bit value resulting from allocating a 4 byte word to hold an
1278 address in the .sdata2 section, and returning the offset from
1279 _SDA2_BASE_ for that relocation. */
1280 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1281 0, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_bitfield, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_SDA2I16", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1295 small data items. */
1296 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1297 0, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_signed, /* complain_on_overflow */
1303 bfd_elf_generic_reloc, /* special_function */
1304 "R_PPC_EMB_SDA2REL", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1311 signed offset from the appropriate base, and filling in the register
1312 field with the appropriate register (0, 2, or 13). */
1313 HOWTO (R_PPC_EMB_SDA21, /* type */
1314 0, /* rightshift */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1316 16, /* bitsize */
1317 FALSE, /* pc_relative */
1318 0, /* bitpos */
1319 complain_overflow_signed, /* complain_on_overflow */
1320 bfd_elf_generic_reloc, /* special_function */
1321 "R_PPC_EMB_SDA21", /* name */
1322 FALSE, /* partial_inplace */
1323 0, /* src_mask */
1324 0xffff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 /* Relocation not handled: R_PPC_EMB_MRKREF */
1328 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1329 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1330 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1331 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1332 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1333
1334 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1335 in the 16 bit signed offset from the appropriate base, and filling in the
1336 register field with the appropriate register (0, 2, or 13). */
1337 HOWTO (R_PPC_EMB_RELSDA, /* type */
1338 0, /* rightshift */
1339 1, /* size (0 = byte, 1 = short, 2 = long) */
1340 16, /* bitsize */
1341 TRUE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_signed, /* complain_on_overflow */
1344 bfd_elf_generic_reloc, /* special_function */
1345 "R_PPC_EMB_RELSDA", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 0xffff, /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* A 16 bit relative relocation. */
1352 HOWTO (R_PPC_REL16, /* type */
1353 0, /* rightshift */
1354 1, /* size (0 = byte, 1 = short, 2 = long) */
1355 16, /* bitsize */
1356 TRUE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_bitfield, /* complain_on_overflow */
1359 bfd_elf_generic_reloc, /* special_function */
1360 "R_PPC_REL16", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 0xffff, /* dst_mask */
1364 TRUE), /* pcrel_offset */
1365
1366 /* A 16 bit relative relocation without overflow. */
1367 HOWTO (R_PPC_REL16_LO, /* type */
1368 0, /* rightshift */
1369 1, /* size (0 = byte, 1 = short, 2 = long) */
1370 16, /* bitsize */
1371 TRUE, /* pc_relative */
1372 0, /* bitpos */
1373 complain_overflow_dont,/* complain_on_overflow */
1374 bfd_elf_generic_reloc, /* special_function */
1375 "R_PPC_REL16_LO", /* name */
1376 FALSE, /* partial_inplace */
1377 0, /* src_mask */
1378 0xffff, /* dst_mask */
1379 TRUE), /* pcrel_offset */
1380
1381 /* The high order 16 bits of a relative address. */
1382 HOWTO (R_PPC_REL16_HI, /* type */
1383 16, /* rightshift */
1384 1, /* size (0 = byte, 1 = short, 2 = long) */
1385 16, /* bitsize */
1386 TRUE, /* pc_relative */
1387 0, /* bitpos */
1388 complain_overflow_dont, /* complain_on_overflow */
1389 bfd_elf_generic_reloc, /* special_function */
1390 "R_PPC_REL16_HI", /* name */
1391 FALSE, /* partial_inplace */
1392 0, /* src_mask */
1393 0xffff, /* dst_mask */
1394 TRUE), /* pcrel_offset */
1395
1396 /* The high order 16 bits of a relative address, plus 1 if the contents of
1397 the low 16 bits, treated as a signed number, is negative. */
1398 HOWTO (R_PPC_REL16_HA, /* type */
1399 16, /* rightshift */
1400 1, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 TRUE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_dont, /* complain_on_overflow */
1405 ppc_elf_addr16_ha_reloc, /* special_function */
1406 "R_PPC_REL16_HA", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 TRUE), /* pcrel_offset */
1411
1412 /* GNU extension to record C++ vtable hierarchy. */
1413 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1414 0, /* rightshift */
1415 0, /* size (0 = byte, 1 = short, 2 = long) */
1416 0, /* bitsize */
1417 FALSE, /* pc_relative */
1418 0, /* bitpos */
1419 complain_overflow_dont, /* complain_on_overflow */
1420 NULL, /* special_function */
1421 "R_PPC_GNU_VTINHERIT", /* name */
1422 FALSE, /* partial_inplace */
1423 0, /* src_mask */
1424 0, /* dst_mask */
1425 FALSE), /* pcrel_offset */
1426
1427 /* GNU extension to record C++ vtable member usage. */
1428 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1429 0, /* rightshift */
1430 0, /* size (0 = byte, 1 = short, 2 = long) */
1431 0, /* bitsize */
1432 FALSE, /* pc_relative */
1433 0, /* bitpos */
1434 complain_overflow_dont, /* complain_on_overflow */
1435 NULL, /* special_function */
1436 "R_PPC_GNU_VTENTRY", /* name */
1437 FALSE, /* partial_inplace */
1438 0, /* src_mask */
1439 0, /* dst_mask */
1440 FALSE), /* pcrel_offset */
1441
1442 /* Phony reloc to handle AIX style TOC entries. */
1443 HOWTO (R_PPC_TOC16, /* type */
1444 0, /* rightshift */
1445 1, /* size (0 = byte, 1 = short, 2 = long) */
1446 16, /* bitsize */
1447 FALSE, /* pc_relative */
1448 0, /* bitpos */
1449 complain_overflow_signed, /* complain_on_overflow */
1450 bfd_elf_generic_reloc, /* special_function */
1451 "R_PPC_TOC16", /* name */
1452 FALSE, /* partial_inplace */
1453 0, /* src_mask */
1454 0xffff, /* dst_mask */
1455 FALSE), /* pcrel_offset */
1456 };
1457 \f
1458 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1459
1460 static void
1461 ppc_elf_howto_init (void)
1462 {
1463 unsigned int i, type;
1464
1465 for (i = 0;
1466 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1467 i++)
1468 {
1469 type = ppc_elf_howto_raw[i].type;
1470 if (type >= (sizeof (ppc_elf_howto_table)
1471 / sizeof (ppc_elf_howto_table[0])))
1472 abort ();
1473 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1474 }
1475 }
1476
1477 static reloc_howto_type *
1478 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1479 bfd_reloc_code_real_type code)
1480 {
1481 enum elf_ppc_reloc_type r;
1482
1483 /* Initialize howto table if not already done. */
1484 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1485 ppc_elf_howto_init ();
1486
1487 switch (code)
1488 {
1489 default:
1490 return NULL;
1491
1492 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1493 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1494 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1495 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1496 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1497 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1498 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1499 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1500 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1501 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1502 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1503 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1504 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1505 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1506 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1507 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1508 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1509 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1510 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1511 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1512 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1513 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1514 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1515 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1516 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1517 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1518 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1519 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1520 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1521 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1522 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1523 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1524 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1525 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1526 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1527 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1528 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1529 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1530 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1531 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1532 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1533 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1534 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1535 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1536 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1537 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1538 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1541 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1542 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1545 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1546 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1549 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1550 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1553 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1554 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1555 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1558 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1559 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1560 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1561 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1562 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1563 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1564 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1565 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1566 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1567 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1568 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1569 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1570 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1571 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1572 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1573 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1574 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1575 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1576 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1577 }
1578
1579 return ppc_elf_howto_table[r];
1580 };
1581
1582 static reloc_howto_type *
1583 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1584 const char *r_name)
1585 {
1586 unsigned int i;
1587
1588 for (i = 0;
1589 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1590 i++)
1591 if (ppc_elf_howto_raw[i].name != NULL
1592 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1593 return &ppc_elf_howto_raw[i];
1594
1595 return NULL;
1596 }
1597
1598 /* Set the howto pointer for a PowerPC ELF reloc. */
1599
1600 static void
1601 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1602 arelent *cache_ptr,
1603 Elf_Internal_Rela *dst)
1604 {
1605 /* Initialize howto table if not already done. */
1606 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1607 ppc_elf_howto_init ();
1608
1609 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1610 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1611
1612 /* Just because the above assert didn't trigger doesn't mean that
1613 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1614 if (!cache_ptr->howto)
1615 {
1616 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1617 abfd, ELF32_R_TYPE (dst->r_info));
1618 bfd_set_error (bfd_error_bad_value);
1619
1620 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1621 }
1622 }
1623
1624 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1625
1626 static bfd_reloc_status_type
1627 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1628 arelent *reloc_entry,
1629 asymbol *symbol,
1630 void *data ATTRIBUTE_UNUSED,
1631 asection *input_section,
1632 bfd *output_bfd,
1633 char **error_message ATTRIBUTE_UNUSED)
1634 {
1635 bfd_vma relocation;
1636
1637 if (output_bfd != NULL)
1638 {
1639 reloc_entry->address += input_section->output_offset;
1640 return bfd_reloc_ok;
1641 }
1642
1643 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1644 return bfd_reloc_outofrange;
1645
1646 if (bfd_is_com_section (symbol->section))
1647 relocation = 0;
1648 else
1649 relocation = symbol->value;
1650
1651 relocation += symbol->section->output_section->vma;
1652 relocation += symbol->section->output_offset;
1653 relocation += reloc_entry->addend;
1654 if (reloc_entry->howto->pc_relative)
1655 relocation -= reloc_entry->address;
1656
1657 reloc_entry->addend += (relocation & 0x8000) << 1;
1658
1659 return bfd_reloc_continue;
1660 }
1661
1662 static bfd_reloc_status_type
1663 ppc_elf_unhandled_reloc (bfd *abfd,
1664 arelent *reloc_entry,
1665 asymbol *symbol,
1666 void *data,
1667 asection *input_section,
1668 bfd *output_bfd,
1669 char **error_message)
1670 {
1671 /* If this is a relocatable link (output_bfd test tells us), just
1672 call the generic function. Any adjustment will be done at final
1673 link time. */
1674 if (output_bfd != NULL)
1675 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1676 input_section, output_bfd, error_message);
1677
1678 if (error_message != NULL)
1679 {
1680 static char buf[60];
1681 sprintf (buf, _("generic linker can't handle %s"),
1682 reloc_entry->howto->name);
1683 *error_message = buf;
1684 }
1685 return bfd_reloc_dangerous;
1686 }
1687 \f
1688 /* Sections created by the linker. */
1689
1690 typedef struct elf_linker_section
1691 {
1692 /* Pointer to the bfd section. */
1693 asection *section;
1694 /* Section name. */
1695 const char *name;
1696 /* Associated bss section name. */
1697 const char *bss_name;
1698 /* Associated symbol name. */
1699 const char *sym_name;
1700 /* Associated symbol. */
1701 struct elf_link_hash_entry *sym;
1702 } elf_linker_section_t;
1703
1704 /* Linked list of allocated pointer entries. This hangs off of the
1705 symbol lists, and provides allows us to return different pointers,
1706 based on different addend's. */
1707
1708 typedef struct elf_linker_section_pointers
1709 {
1710 /* next allocated pointer for this symbol */
1711 struct elf_linker_section_pointers *next;
1712 /* offset of pointer from beginning of section */
1713 bfd_vma offset;
1714 /* addend used */
1715 bfd_vma addend;
1716 /* which linker section this is */
1717 elf_linker_section_t *lsect;
1718 } elf_linker_section_pointers_t;
1719
1720 struct ppc_elf_obj_tdata
1721 {
1722 struct elf_obj_tdata elf;
1723
1724 /* A mapping from local symbols to offsets into the various linker
1725 sections added. This is index by the symbol index. */
1726 elf_linker_section_pointers_t **linker_section_pointers;
1727
1728 /* Flags used to auto-detect plt type. */
1729 unsigned int makes_plt_call : 1;
1730 unsigned int has_rel16 : 1;
1731 };
1732
1733 #define ppc_elf_tdata(bfd) \
1734 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1735
1736 #define elf_local_ptr_offsets(bfd) \
1737 (ppc_elf_tdata (bfd)->linker_section_pointers)
1738
1739 /* Override the generic function because we store some extras. */
1740
1741 static bfd_boolean
1742 ppc_elf_mkobject (bfd *abfd)
1743 {
1744 if (abfd->tdata.any == NULL)
1745 {
1746 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1747 abfd->tdata.any = bfd_zalloc (abfd, amt);
1748 if (abfd->tdata.any == NULL)
1749 return FALSE;
1750 }
1751 return bfd_elf_mkobject (abfd);
1752 }
1753
1754 /* Fix bad default arch selected for a 32 bit input bfd when the
1755 default is 64 bit. */
1756
1757 static bfd_boolean
1758 ppc_elf_object_p (bfd *abfd)
1759 {
1760 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1761 {
1762 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1763
1764 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1765 {
1766 /* Relies on arch after 64 bit default being 32 bit default. */
1767 abfd->arch_info = abfd->arch_info->next;
1768 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1769 }
1770 }
1771 return TRUE;
1772 }
1773
1774 /* Function to set whether a module needs the -mrelocatable bit set. */
1775
1776 static bfd_boolean
1777 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1778 {
1779 BFD_ASSERT (!elf_flags_init (abfd)
1780 || elf_elfheader (abfd)->e_flags == flags);
1781
1782 elf_elfheader (abfd)->e_flags = flags;
1783 elf_flags_init (abfd) = TRUE;
1784 return TRUE;
1785 }
1786
1787 /* Support for core dump NOTE sections. */
1788
1789 static bfd_boolean
1790 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1791 {
1792 int offset;
1793 unsigned int size;
1794
1795 switch (note->descsz)
1796 {
1797 default:
1798 return FALSE;
1799
1800 case 268: /* Linux/PPC. */
1801 /* pr_cursig */
1802 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1803
1804 /* pr_pid */
1805 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1806
1807 /* pr_reg */
1808 offset = 72;
1809 size = 192;
1810
1811 break;
1812 }
1813
1814 /* Make a ".reg/999" section. */
1815 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1816 size, note->descpos + offset);
1817 }
1818
1819 static bfd_boolean
1820 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1821 {
1822 switch (note->descsz)
1823 {
1824 default:
1825 return FALSE;
1826
1827 case 128: /* Linux/PPC elf_prpsinfo. */
1828 elf_tdata (abfd)->core_program
1829 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1830 elf_tdata (abfd)->core_command
1831 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1832 }
1833
1834 /* Note that for some reason, a spurious space is tacked
1835 onto the end of the args in some (at least one anyway)
1836 implementations, so strip it off if it exists. */
1837
1838 {
1839 char *command = elf_tdata (abfd)->core_command;
1840 int n = strlen (command);
1841
1842 if (0 < n && command[n - 1] == ' ')
1843 command[n - 1] = '\0';
1844 }
1845
1846 return TRUE;
1847 }
1848
1849 static char *
1850 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1851 {
1852 switch (note_type)
1853 {
1854 default:
1855 return NULL;
1856
1857 case NT_PRPSINFO:
1858 {
1859 char data[128];
1860 va_list ap;
1861
1862 va_start (ap, note_type);
1863 memset (data, 0, 32);
1864 strncpy (data + 32, va_arg (ap, const char *), 16);
1865 strncpy (data + 48, va_arg (ap, const char *), 80);
1866 va_end (ap);
1867 return elfcore_write_note (abfd, buf, bufsiz,
1868 "CORE", note_type, data, sizeof (data));
1869 }
1870
1871 case NT_PRSTATUS:
1872 {
1873 char data[268];
1874 va_list ap;
1875 long pid;
1876 int cursig;
1877 const void *greg;
1878
1879 va_start (ap, note_type);
1880 memset (data, 0, 72);
1881 pid = va_arg (ap, long);
1882 bfd_put_32 (abfd, pid, data + 24);
1883 cursig = va_arg (ap, int);
1884 bfd_put_16 (abfd, cursig, data + 12);
1885 greg = va_arg (ap, const void *);
1886 memcpy (data + 72, greg, 192);
1887 memset (data + 264, 0, 4);
1888 va_end (ap);
1889 return elfcore_write_note (abfd, buf, bufsiz,
1890 "CORE", note_type, data, sizeof (data));
1891 }
1892 }
1893 }
1894
1895 /* Return address for Ith PLT stub in section PLT, for relocation REL
1896 or (bfd_vma) -1 if it should not be included. */
1897
1898 static bfd_vma
1899 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1900 const asection *plt ATTRIBUTE_UNUSED,
1901 const arelent *rel)
1902 {
1903 return rel->address;
1904 }
1905
1906 /* Handle a PowerPC specific section when reading an object file. This
1907 is called when bfd_section_from_shdr finds a section with an unknown
1908 type. */
1909
1910 static bfd_boolean
1911 ppc_elf_section_from_shdr (bfd *abfd,
1912 Elf_Internal_Shdr *hdr,
1913 const char *name,
1914 int shindex)
1915 {
1916 asection *newsect;
1917 flagword flags;
1918
1919 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1920 return FALSE;
1921
1922 newsect = hdr->bfd_section;
1923 flags = bfd_get_section_flags (abfd, newsect);
1924 if (hdr->sh_flags & SHF_EXCLUDE)
1925 flags |= SEC_EXCLUDE;
1926
1927 if (hdr->sh_type == SHT_ORDERED)
1928 flags |= SEC_SORT_ENTRIES;
1929
1930 bfd_set_section_flags (abfd, newsect, flags);
1931 return TRUE;
1932 }
1933
1934 /* Set up any other section flags and such that may be necessary. */
1935
1936 static bfd_boolean
1937 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1938 Elf_Internal_Shdr *shdr,
1939 asection *asect)
1940 {
1941 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1942 shdr->sh_flags |= SHF_EXCLUDE;
1943
1944 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1945 shdr->sh_type = SHT_ORDERED;
1946
1947 return TRUE;
1948 }
1949
1950 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1951 need to bump up the number of section headers. */
1952
1953 static int
1954 ppc_elf_additional_program_headers (bfd *abfd,
1955 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1956 {
1957 asection *s;
1958 int ret = 0;
1959
1960 s = bfd_get_section_by_name (abfd, ".sbss2");
1961 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1962 ++ret;
1963
1964 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1965 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1966 ++ret;
1967
1968 return ret;
1969 }
1970
1971 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1972 .PPC.EMB.sbss0 a normal section, and not a bss section so
1973 that the linker doesn't crater when trying to make more than
1974 2 sections. */
1975
1976 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1977 {
1978 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1979 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1980 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1981 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1982 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1983 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1984 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1985 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1986 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1987 { NULL, 0, 0, 0, 0 }
1988 };
1989
1990 /* This is what we want for new plt/got. */
1991 static struct bfd_elf_special_section ppc_alt_plt =
1992 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1993
1994 static const struct bfd_elf_special_section *
1995 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1996 {
1997 const struct bfd_elf_special_section *ssect;
1998
1999 /* See if this is one of the special sections. */
2000 if (sec->name == NULL)
2001 return NULL;
2002
2003 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2004 sec->use_rela_p);
2005 if (ssect != NULL)
2006 {
2007 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2008 ssect = &ppc_alt_plt;
2009 return ssect;
2010 }
2011
2012 return _bfd_elf_get_sec_type_attr (abfd, sec);
2013 }
2014 \f
2015 /* Very simple linked list structure for recording apuinfo values. */
2016 typedef struct apuinfo_list
2017 {
2018 struct apuinfo_list *next;
2019 unsigned long value;
2020 }
2021 apuinfo_list;
2022
2023 static apuinfo_list *head;
2024
2025
2026 static void
2027 apuinfo_list_init (void)
2028 {
2029 head = NULL;
2030 }
2031
2032 static void
2033 apuinfo_list_add (unsigned long value)
2034 {
2035 apuinfo_list *entry = head;
2036
2037 while (entry != NULL)
2038 {
2039 if (entry->value == value)
2040 return;
2041 entry = entry->next;
2042 }
2043
2044 entry = bfd_malloc (sizeof (* entry));
2045 if (entry == NULL)
2046 return;
2047
2048 entry->value = value;
2049 entry->next = head;
2050 head = entry;
2051 }
2052
2053 static unsigned
2054 apuinfo_list_length (void)
2055 {
2056 apuinfo_list *entry;
2057 unsigned long count;
2058
2059 for (entry = head, count = 0;
2060 entry;
2061 entry = entry->next)
2062 ++ count;
2063
2064 return count;
2065 }
2066
2067 static inline unsigned long
2068 apuinfo_list_element (unsigned long number)
2069 {
2070 apuinfo_list * entry;
2071
2072 for (entry = head;
2073 entry && number --;
2074 entry = entry->next)
2075 ;
2076
2077 return entry ? entry->value : 0;
2078 }
2079
2080 static void
2081 apuinfo_list_finish (void)
2082 {
2083 apuinfo_list *entry;
2084
2085 for (entry = head; entry;)
2086 {
2087 apuinfo_list *next = entry->next;
2088 free (entry);
2089 entry = next;
2090 }
2091
2092 head = NULL;
2093 }
2094
2095 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2096 #define APUINFO_LABEL "APUinfo"
2097
2098 /* Scan the input BFDs and create a linked list of
2099 the APUinfo values that will need to be emitted. */
2100
2101 static void
2102 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2103 {
2104 bfd *ibfd;
2105 asection *asec;
2106 char *buffer;
2107 unsigned num_input_sections;
2108 bfd_size_type output_section_size;
2109 unsigned i;
2110 unsigned num_entries;
2111 unsigned long offset;
2112 unsigned long length;
2113 const char *error_message = NULL;
2114
2115 if (link_info == NULL)
2116 return;
2117
2118 /* Scan the input bfds, looking for apuinfo sections. */
2119 num_input_sections = 0;
2120 output_section_size = 0;
2121
2122 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2123 {
2124 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2125 if (asec)
2126 {
2127 ++ num_input_sections;
2128 output_section_size += asec->size;
2129 }
2130 }
2131
2132 /* We need at least one input sections
2133 in order to make merging worthwhile. */
2134 if (num_input_sections < 1)
2135 return;
2136
2137 /* Just make sure that the output section exists as well. */
2138 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2139 if (asec == NULL)
2140 return;
2141
2142 /* Allocate a buffer for the contents of the input sections. */
2143 buffer = bfd_malloc (output_section_size);
2144 if (buffer == NULL)
2145 return;
2146
2147 offset = 0;
2148 apuinfo_list_init ();
2149
2150 /* Read in the input sections contents. */
2151 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2152 {
2153 unsigned long datum;
2154 char *ptr;
2155
2156 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2157 if (asec == NULL)
2158 continue;
2159
2160 length = asec->size;
2161 if (length < 24)
2162 {
2163 error_message = _("corrupt or empty %s section in %B");
2164 goto fail;
2165 }
2166
2167 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2168 || (bfd_bread (buffer + offset, length, ibfd) != length))
2169 {
2170 error_message = _("unable to read in %s section from %B");
2171 goto fail;
2172 }
2173
2174 /* Process the contents of the section. */
2175 ptr = buffer + offset;
2176 error_message = _("corrupt %s section in %B");
2177
2178 /* Verify the contents of the header. Note - we have to
2179 extract the values this way in order to allow for a
2180 host whose endian-ness is different from the target. */
2181 datum = bfd_get_32 (ibfd, ptr);
2182 if (datum != sizeof APUINFO_LABEL)
2183 goto fail;
2184
2185 datum = bfd_get_32 (ibfd, ptr + 8);
2186 if (datum != 0x2)
2187 goto fail;
2188
2189 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2190 goto fail;
2191
2192 /* Get the number of bytes used for apuinfo entries. */
2193 datum = bfd_get_32 (ibfd, ptr + 4);
2194 if (datum + 20 != length)
2195 goto fail;
2196
2197 /* Make sure that we do not run off the end of the section. */
2198 if (offset + length > output_section_size)
2199 goto fail;
2200
2201 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2202 for (i = 0; i < datum; i += 4)
2203 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2204
2205 /* Update the offset. */
2206 offset += length;
2207 }
2208
2209 error_message = NULL;
2210
2211 /* Compute the size of the output section. */
2212 num_entries = apuinfo_list_length ();
2213 output_section_size = 20 + num_entries * 4;
2214
2215 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2216
2217 if (! bfd_set_section_size (abfd, asec, output_section_size))
2218 ibfd = abfd,
2219 error_message = _("warning: unable to set size of %s section in %B");
2220
2221 fail:
2222 free (buffer);
2223
2224 if (error_message)
2225 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2226 }
2227
2228 /* Prevent the output section from accumulating the input sections'
2229 contents. We have already stored this in our linked list structure. */
2230
2231 static bfd_boolean
2232 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2233 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2234 asection *asec,
2235 bfd_byte *contents ATTRIBUTE_UNUSED)
2236 {
2237 return (apuinfo_list_length ()
2238 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2239 }
2240
2241 /* Finally we can generate the output section. */
2242
2243 static void
2244 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2245 {
2246 bfd_byte *buffer;
2247 asection *asec;
2248 unsigned i;
2249 unsigned num_entries;
2250 bfd_size_type length;
2251
2252 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2253 if (asec == NULL)
2254 return;
2255
2256 if (apuinfo_list_length () == 0)
2257 return;
2258
2259 length = asec->size;
2260 if (length < 20)
2261 return;
2262
2263 buffer = bfd_malloc (length);
2264 if (buffer == NULL)
2265 {
2266 (*_bfd_error_handler)
2267 (_("failed to allocate space for new APUinfo section."));
2268 return;
2269 }
2270
2271 /* Create the apuinfo header. */
2272 num_entries = apuinfo_list_length ();
2273 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2274 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2275 bfd_put_32 (abfd, 0x2, buffer + 8);
2276 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2277
2278 length = 20;
2279 for (i = 0; i < num_entries; i++)
2280 {
2281 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2282 length += 4;
2283 }
2284
2285 if (length != asec->size)
2286 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2287
2288 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2289 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2290
2291 free (buffer);
2292
2293 apuinfo_list_finish ();
2294 }
2295 \f
2296 /* The following functions are specific to the ELF linker, while
2297 functions above are used generally. They appear in this file more
2298 or less in the order in which they are called. eg.
2299 ppc_elf_check_relocs is called early in the link process,
2300 ppc_elf_finish_dynamic_sections is one of the last functions
2301 called. */
2302
2303 /* The PPC linker needs to keep track of the number of relocs that it
2304 decides to copy as dynamic relocs in check_relocs for each symbol.
2305 This is so that it can later discard them if they are found to be
2306 unnecessary. We store the information in a field extending the
2307 regular ELF linker hash table. */
2308
2309 struct ppc_elf_dyn_relocs
2310 {
2311 struct ppc_elf_dyn_relocs *next;
2312
2313 /* The input section of the reloc. */
2314 asection *sec;
2315
2316 /* Total number of relocs copied for the input section. */
2317 bfd_size_type count;
2318
2319 /* Number of pc-relative relocs copied for the input section. */
2320 bfd_size_type pc_count;
2321 };
2322
2323 /* Track PLT entries needed for a given symbol. We might need more
2324 than one glink entry per symbol. */
2325 struct plt_entry
2326 {
2327 struct plt_entry *next;
2328
2329 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2330 This field stores the offset into .got2 used to initialise the
2331 GOT pointer reg. It will always be at least 32768 (and for
2332 current gcc this is the only offset used). */
2333 bfd_vma addend;
2334
2335 /* The .got2 section. */
2336 asection *sec;
2337
2338 /* PLT refcount or offset. */
2339 union
2340 {
2341 bfd_signed_vma refcount;
2342 bfd_vma offset;
2343 } plt;
2344
2345 /* .glink stub offset. */
2346 bfd_vma glink_offset;
2347 };
2348
2349 /* Of those relocs that might be copied as dynamic relocs, this macro
2350 selects those that must be copied when linking a shared library,
2351 even when the symbol is local. */
2352
2353 #define MUST_BE_DYN_RELOC(RTYPE) \
2354 ((RTYPE) != R_PPC_REL24 \
2355 && (RTYPE) != R_PPC_REL14 \
2356 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2357 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2358 && (RTYPE) != R_PPC_REL32)
2359
2360 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2361 copying dynamic variables from a shared lib into an app's dynbss
2362 section, and instead use a dynamic relocation to point into the
2363 shared lib. */
2364 #define ELIMINATE_COPY_RELOCS 1
2365
2366 /* PPC ELF linker hash entry. */
2367
2368 struct ppc_elf_link_hash_entry
2369 {
2370 struct elf_link_hash_entry elf;
2371
2372 /* If this symbol is used in the linker created sections, the processor
2373 specific backend uses this field to map the field into the offset
2374 from the beginning of the section. */
2375 elf_linker_section_pointers_t *linker_section_pointer;
2376
2377 /* Track dynamic relocs copied for this symbol. */
2378 struct ppc_elf_dyn_relocs *dyn_relocs;
2379
2380 /* Contexts in which symbol is used in the GOT (or TOC).
2381 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2382 corresponding relocs are encountered during check_relocs.
2383 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2384 indicate the corresponding GOT entry type is not needed. */
2385 #define TLS_GD 1 /* GD reloc. */
2386 #define TLS_LD 2 /* LD reloc. */
2387 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2388 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2389 #define TLS_TLS 16 /* Any TLS reloc. */
2390 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2391 char tls_mask;
2392
2393 /* Nonzero if we have seen a small data relocation referring to this
2394 symbol. */
2395 unsigned char has_sda_refs;
2396 };
2397
2398 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2399
2400 /* PPC ELF linker hash table. */
2401
2402 struct ppc_elf_link_hash_table
2403 {
2404 struct elf_link_hash_table elf;
2405
2406 /* Short-cuts to get to dynamic linker sections. */
2407 asection *got;
2408 asection *relgot;
2409 asection *glink;
2410 asection *plt;
2411 asection *relplt;
2412 asection *dynbss;
2413 asection *relbss;
2414 asection *dynsbss;
2415 asection *relsbss;
2416 elf_linker_section_t sdata[2];
2417 asection *sbss;
2418
2419 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2420 asection *srelplt2;
2421
2422 /* The .got.plt section (VxWorks only)*/
2423 asection *sgotplt;
2424
2425 /* Shortcut to .__tls_get_addr. */
2426 struct elf_link_hash_entry *tls_get_addr;
2427
2428 /* The bfd that forced an old-style PLT. */
2429 bfd *old_bfd;
2430
2431 /* TLS local dynamic got entry handling. */
2432 union {
2433 bfd_signed_vma refcount;
2434 bfd_vma offset;
2435 } tlsld_got;
2436
2437 /* Offset of PltResolve function in glink. */
2438 bfd_vma glink_pltresolve;
2439
2440 /* Size of reserved GOT entries. */
2441 unsigned int got_header_size;
2442 /* Non-zero if allocating the header left a gap. */
2443 unsigned int got_gap;
2444
2445 /* The type of PLT we have chosen to use. */
2446 enum ppc_elf_plt_type plt_type;
2447
2448 /* Set if we should emit symbols for stubs. */
2449 unsigned int emit_stub_syms:1;
2450
2451 /* True if the target system is VxWorks. */
2452 unsigned int is_vxworks:1;
2453
2454 /* The size of PLT entries. */
2455 int plt_entry_size;
2456 /* The distance between adjacent PLT slots. */
2457 int plt_slot_size;
2458 /* The size of the first PLT entry. */
2459 int plt_initial_entry_size;
2460
2461 /* Small local sym to section mapping cache. */
2462 struct sym_sec_cache sym_sec;
2463 };
2464
2465 /* Get the PPC ELF linker hash table from a link_info structure. */
2466
2467 #define ppc_elf_hash_table(p) \
2468 ((struct ppc_elf_link_hash_table *) (p)->hash)
2469
2470 /* Create an entry in a PPC ELF linker hash table. */
2471
2472 static struct bfd_hash_entry *
2473 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2474 struct bfd_hash_table *table,
2475 const char *string)
2476 {
2477 /* Allocate the structure if it has not already been allocated by a
2478 subclass. */
2479 if (entry == NULL)
2480 {
2481 entry = bfd_hash_allocate (table,
2482 sizeof (struct ppc_elf_link_hash_entry));
2483 if (entry == NULL)
2484 return entry;
2485 }
2486
2487 /* Call the allocation method of the superclass. */
2488 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2489 if (entry != NULL)
2490 {
2491 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2492 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2493 ppc_elf_hash_entry (entry)->tls_mask = 0;
2494 }
2495
2496 return entry;
2497 }
2498
2499 /* Create a PPC ELF linker hash table. */
2500
2501 static struct bfd_link_hash_table *
2502 ppc_elf_link_hash_table_create (bfd *abfd)
2503 {
2504 struct ppc_elf_link_hash_table *ret;
2505
2506 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2507 if (ret == NULL)
2508 return NULL;
2509
2510 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2511 ppc_elf_link_hash_newfunc,
2512 sizeof (struct ppc_elf_link_hash_entry)))
2513 {
2514 free (ret);
2515 return NULL;
2516 }
2517
2518 ret->elf.init_plt_refcount.refcount = 0;
2519 ret->elf.init_plt_refcount.glist = NULL;
2520 ret->elf.init_plt_offset.offset = 0;
2521 ret->elf.init_plt_offset.glist = NULL;
2522
2523 ret->sdata[0].name = ".sdata";
2524 ret->sdata[0].sym_name = "_SDA_BASE_";
2525 ret->sdata[0].bss_name = ".sbss";
2526
2527 ret->sdata[1].name = ".sdata2";
2528 ret->sdata[1].sym_name = "_SDA2_BASE_";
2529 ret->sdata[1].bss_name = ".sbss2";
2530
2531 ret->plt_entry_size = 12;
2532 ret->plt_slot_size = 8;
2533 ret->plt_initial_entry_size = 72;
2534
2535 return &ret->elf.root;
2536 }
2537
2538 /* Create .got and the related sections. */
2539
2540 static bfd_boolean
2541 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2542 {
2543 struct ppc_elf_link_hash_table *htab;
2544 asection *s;
2545 flagword flags;
2546
2547 if (!_bfd_elf_create_got_section (abfd, info))
2548 return FALSE;
2549
2550 htab = ppc_elf_hash_table (info);
2551 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2552 if (s == NULL)
2553 abort ();
2554
2555 if (htab->is_vxworks)
2556 {
2557 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2558 if (!htab->sgotplt)
2559 abort ();
2560 }
2561 else
2562 {
2563 /* The powerpc .got has a blrl instruction in it. Mark it
2564 executable. */
2565 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2566 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2567 if (!bfd_set_section_flags (abfd, s, flags))
2568 return FALSE;
2569 }
2570
2571 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2572 | SEC_LINKER_CREATED | SEC_READONLY);
2573 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2574 if (!htab->relgot
2575 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2576 return FALSE;
2577
2578 return TRUE;
2579 }
2580
2581 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2582 to output sections (just like _bfd_elf_create_dynamic_sections has
2583 to create .dynbss and .rela.bss). */
2584
2585 static bfd_boolean
2586 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2587 {
2588 struct ppc_elf_link_hash_table *htab;
2589 asection *s;
2590 flagword flags;
2591
2592 htab = ppc_elf_hash_table (info);
2593
2594 if (htab->got == NULL
2595 && !ppc_elf_create_got (abfd, info))
2596 return FALSE;
2597
2598 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2599 return FALSE;
2600
2601 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2602 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2603
2604 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2605 htab->glink = s;
2606 if (s == NULL
2607 || !bfd_set_section_alignment (abfd, s, 4))
2608 return FALSE;
2609
2610 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2611 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2612 SEC_ALLOC | SEC_LINKER_CREATED);
2613 htab->dynsbss = s;
2614 if (s == NULL)
2615 return FALSE;
2616
2617 if (! info->shared)
2618 {
2619 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2620 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2621 htab->relsbss = s;
2622 if (s == NULL
2623 || ! bfd_set_section_alignment (abfd, s, 2))
2624 return FALSE;
2625 }
2626
2627 if (htab->is_vxworks
2628 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2629 return FALSE;
2630
2631 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2632 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2633 if (s == NULL)
2634 abort ();
2635
2636 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2637 if (htab->plt_type == PLT_VXWORKS)
2638 /* The VxWorks PLT is a loaded section with contents. */
2639 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2640 return bfd_set_section_flags (abfd, s, flags);
2641 }
2642
2643 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2644
2645 static void
2646 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2647 struct elf_link_hash_entry *dir,
2648 struct elf_link_hash_entry *ind)
2649 {
2650 struct ppc_elf_link_hash_entry *edir, *eind;
2651
2652 edir = (struct ppc_elf_link_hash_entry *) dir;
2653 eind = (struct ppc_elf_link_hash_entry *) ind;
2654
2655 if (eind->dyn_relocs != NULL)
2656 {
2657 if (edir->dyn_relocs != NULL)
2658 {
2659 struct ppc_elf_dyn_relocs **pp;
2660 struct ppc_elf_dyn_relocs *p;
2661
2662 /* Add reloc counts against the indirect sym to the direct sym
2663 list. Merge any entries against the same section. */
2664 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2665 {
2666 struct ppc_elf_dyn_relocs *q;
2667
2668 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2669 if (q->sec == p->sec)
2670 {
2671 q->pc_count += p->pc_count;
2672 q->count += p->count;
2673 *pp = p->next;
2674 break;
2675 }
2676 if (q == NULL)
2677 pp = &p->next;
2678 }
2679 *pp = edir->dyn_relocs;
2680 }
2681
2682 edir->dyn_relocs = eind->dyn_relocs;
2683 eind->dyn_relocs = NULL;
2684 }
2685
2686 edir->tls_mask |= eind->tls_mask;
2687 edir->has_sda_refs |= eind->has_sda_refs;
2688
2689 /* If called to transfer flags for a weakdef during processing
2690 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2691 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2692 if (!(ELIMINATE_COPY_RELOCS
2693 && eind->elf.root.type != bfd_link_hash_indirect
2694 && edir->elf.dynamic_adjusted))
2695 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2696
2697 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2698 edir->elf.ref_regular |= eind->elf.ref_regular;
2699 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2700 edir->elf.needs_plt |= eind->elf.needs_plt;
2701
2702 /* If we were called to copy over info for a weak sym, that's all. */
2703 if (eind->elf.root.type != bfd_link_hash_indirect)
2704 return;
2705
2706 /* Copy over the GOT refcount entries that we may have already seen to
2707 the symbol which just became indirect. */
2708 edir->elf.got.refcount += eind->elf.got.refcount;
2709 eind->elf.got.refcount = 0;
2710
2711 /* And plt entries. */
2712 if (eind->elf.plt.plist != NULL)
2713 {
2714 if (edir->elf.plt.plist != NULL)
2715 {
2716 struct plt_entry **entp;
2717 struct plt_entry *ent;
2718
2719 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2720 {
2721 struct plt_entry *dent;
2722
2723 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2724 if (dent->sec == ent->sec && dent->addend == ent->addend)
2725 {
2726 dent->plt.refcount += ent->plt.refcount;
2727 *entp = ent->next;
2728 break;
2729 }
2730 if (dent == NULL)
2731 entp = &ent->next;
2732 }
2733 *entp = edir->elf.plt.plist;
2734 }
2735
2736 edir->elf.plt.plist = eind->elf.plt.plist;
2737 eind->elf.plt.plist = NULL;
2738 }
2739
2740 if (eind->elf.dynindx != -1)
2741 {
2742 if (edir->elf.dynindx != -1)
2743 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2744 edir->elf.dynstr_index);
2745 edir->elf.dynindx = eind->elf.dynindx;
2746 edir->elf.dynstr_index = eind->elf.dynstr_index;
2747 eind->elf.dynindx = -1;
2748 eind->elf.dynstr_index = 0;
2749 }
2750 }
2751
2752 /* Return 1 if target is one of ours. */
2753
2754 static bfd_boolean
2755 is_ppc_elf_target (const struct bfd_target *targ)
2756 {
2757 extern const bfd_target bfd_elf32_powerpc_vec;
2758 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2759 extern const bfd_target bfd_elf32_powerpcle_vec;
2760
2761 return (targ == &bfd_elf32_powerpc_vec
2762 || targ == &bfd_elf32_powerpc_vxworks_vec
2763 || targ == &bfd_elf32_powerpcle_vec);
2764 }
2765
2766 /* Hook called by the linker routine which adds symbols from an object
2767 file. We use it to put .comm items in .sbss, and not .bss. */
2768
2769 static bfd_boolean
2770 ppc_elf_add_symbol_hook (bfd *abfd,
2771 struct bfd_link_info *info,
2772 Elf_Internal_Sym *sym,
2773 const char **namep ATTRIBUTE_UNUSED,
2774 flagword *flagsp ATTRIBUTE_UNUSED,
2775 asection **secp,
2776 bfd_vma *valp)
2777 {
2778 if (sym->st_shndx == SHN_COMMON
2779 && !info->relocatable
2780 && sym->st_size <= elf_gp_size (abfd)
2781 && is_ppc_elf_target (info->hash->creator))
2782 {
2783 /* Common symbols less than or equal to -G nn bytes are automatically
2784 put into .sbss. */
2785 struct ppc_elf_link_hash_table *htab;
2786
2787 htab = ppc_elf_hash_table (info);
2788 if (htab->sbss == NULL)
2789 {
2790 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2791
2792 if (!htab->elf.dynobj)
2793 htab->elf.dynobj = abfd;
2794
2795 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2796 ".sbss",
2797 flags);
2798 if (htab->sbss == NULL)
2799 return FALSE;
2800 }
2801
2802 *secp = htab->sbss;
2803 *valp = sym->st_size;
2804 }
2805
2806 return TRUE;
2807 }
2808 \f
2809 static bfd_boolean
2810 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2811 elf_linker_section_t *lsect)
2812 {
2813 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2814 TRUE, FALSE, TRUE);
2815 if (lsect->sym == NULL)
2816 return FALSE;
2817 if (lsect->sym->root.type == bfd_link_hash_new)
2818 lsect->sym->non_elf = 0;
2819 lsect->sym->ref_regular = 1;
2820 return TRUE;
2821 }
2822
2823 /* Create a special linker section. */
2824
2825 static bfd_boolean
2826 ppc_elf_create_linker_section (bfd *abfd,
2827 struct bfd_link_info *info,
2828 flagword flags,
2829 elf_linker_section_t *lsect)
2830 {
2831 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2832 asection *s;
2833
2834 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2835 | SEC_LINKER_CREATED);
2836
2837 /* Record the first bfd that needs the special sections. */
2838 if (!htab->elf.dynobj)
2839 htab->elf.dynobj = abfd;
2840
2841 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2842 lsect->name,
2843 flags);
2844 if (s == NULL
2845 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2846 return FALSE;
2847 lsect->section = s;
2848
2849 return create_sdata_sym (htab, lsect);
2850 }
2851
2852 /* Find a linker generated pointer with a given addend and type. */
2853
2854 static elf_linker_section_pointers_t *
2855 elf_find_pointer_linker_section
2856 (elf_linker_section_pointers_t *linker_pointers,
2857 bfd_vma addend,
2858 elf_linker_section_t *lsect)
2859 {
2860 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2861 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2862 return linker_pointers;
2863
2864 return NULL;
2865 }
2866
2867 /* Allocate a pointer to live in a linker created section. */
2868
2869 static bfd_boolean
2870 elf_create_pointer_linker_section (bfd *abfd,
2871 elf_linker_section_t *lsect,
2872 struct elf_link_hash_entry *h,
2873 const Elf_Internal_Rela *rel)
2874 {
2875 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2876 elf_linker_section_pointers_t *linker_section_ptr;
2877 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2878 bfd_size_type amt;
2879
2880 BFD_ASSERT (lsect != NULL);
2881
2882 /* Is this a global symbol? */
2883 if (h != NULL)
2884 {
2885 struct ppc_elf_link_hash_entry *eh;
2886
2887 /* Has this symbol already been allocated? If so, our work is done. */
2888 eh = (struct ppc_elf_link_hash_entry *) h;
2889 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2890 rel->r_addend,
2891 lsect))
2892 return TRUE;
2893
2894 ptr_linker_section_ptr = &eh->linker_section_pointer;
2895 }
2896 else
2897 {
2898 /* Allocation of a pointer to a local symbol. */
2899 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2900
2901 /* Allocate a table to hold the local symbols if first time. */
2902 if (!ptr)
2903 {
2904 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2905
2906 amt = num_symbols;
2907 amt *= sizeof (elf_linker_section_pointers_t *);
2908 ptr = bfd_zalloc (abfd, amt);
2909
2910 if (!ptr)
2911 return FALSE;
2912
2913 elf_local_ptr_offsets (abfd) = ptr;
2914 }
2915
2916 /* Has this symbol already been allocated? If so, our work is done. */
2917 if (elf_find_pointer_linker_section (ptr[r_symndx],
2918 rel->r_addend,
2919 lsect))
2920 return TRUE;
2921
2922 ptr_linker_section_ptr = &ptr[r_symndx];
2923 }
2924
2925 /* Allocate space for a pointer in the linker section, and allocate
2926 a new pointer record from internal memory. */
2927 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2928 amt = sizeof (elf_linker_section_pointers_t);
2929 linker_section_ptr = bfd_alloc (abfd, amt);
2930
2931 if (!linker_section_ptr)
2932 return FALSE;
2933
2934 linker_section_ptr->next = *ptr_linker_section_ptr;
2935 linker_section_ptr->addend = rel->r_addend;
2936 linker_section_ptr->lsect = lsect;
2937 *ptr_linker_section_ptr = linker_section_ptr;
2938
2939 linker_section_ptr->offset = lsect->section->size;
2940 lsect->section->size += 4;
2941
2942 #ifdef DEBUG
2943 fprintf (stderr,
2944 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2945 lsect->name, (long) linker_section_ptr->offset,
2946 (long) lsect->section->size);
2947 #endif
2948
2949 return TRUE;
2950 }
2951
2952 static bfd_boolean
2953 update_local_sym_info (bfd *abfd,
2954 Elf_Internal_Shdr *symtab_hdr,
2955 unsigned long r_symndx,
2956 int tls_type)
2957 {
2958 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2959 char *local_got_tls_masks;
2960
2961 if (local_got_refcounts == NULL)
2962 {
2963 bfd_size_type size = symtab_hdr->sh_info;
2964
2965 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2966 local_got_refcounts = bfd_zalloc (abfd, size);
2967 if (local_got_refcounts == NULL)
2968 return FALSE;
2969 elf_local_got_refcounts (abfd) = local_got_refcounts;
2970 }
2971
2972 local_got_refcounts[r_symndx] += 1;
2973 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2974 local_got_tls_masks[r_symndx] |= tls_type;
2975 return TRUE;
2976 }
2977
2978 static bfd_boolean
2979 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2980 asection *sec, bfd_vma addend)
2981 {
2982 struct plt_entry *ent;
2983
2984 if (addend < 32768)
2985 sec = NULL;
2986 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2987 if (ent->sec == sec && ent->addend == addend)
2988 break;
2989 if (ent == NULL)
2990 {
2991 bfd_size_type amt = sizeof (*ent);
2992 ent = bfd_alloc (abfd, amt);
2993 if (ent == NULL)
2994 return FALSE;
2995 ent->next = h->plt.plist;
2996 ent->sec = sec;
2997 ent->addend = addend;
2998 ent->plt.refcount = 0;
2999 h->plt.plist = ent;
3000 }
3001 ent->plt.refcount += 1;
3002 return TRUE;
3003 }
3004
3005 static struct plt_entry *
3006 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3007 {
3008 struct plt_entry *ent;
3009
3010 if (addend < 32768)
3011 sec = NULL;
3012 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3013 if (ent->sec == sec && ent->addend == addend)
3014 break;
3015 return ent;
3016 }
3017
3018 static void
3019 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3020 {
3021 (*_bfd_error_handler)
3022 (_("%B: relocation %s cannot be used when making a shared object"),
3023 abfd,
3024 ppc_elf_howto_table[r_type]->name);
3025 bfd_set_error (bfd_error_bad_value);
3026 }
3027
3028 /* Look through the relocs for a section during the first phase, and
3029 allocate space in the global offset table or procedure linkage
3030 table. */
3031
3032 static bfd_boolean
3033 ppc_elf_check_relocs (bfd *abfd,
3034 struct bfd_link_info *info,
3035 asection *sec,
3036 const Elf_Internal_Rela *relocs)
3037 {
3038 struct ppc_elf_link_hash_table *htab;
3039 Elf_Internal_Shdr *symtab_hdr;
3040 struct elf_link_hash_entry **sym_hashes;
3041 const Elf_Internal_Rela *rel;
3042 const Elf_Internal_Rela *rel_end;
3043 asection *got2, *sreloc;
3044
3045 if (info->relocatable)
3046 return TRUE;
3047
3048 /* Don't do anything special with non-loaded, non-alloced sections.
3049 In particular, any relocs in such sections should not affect GOT
3050 and PLT reference counting (ie. we don't allow them to create GOT
3051 or PLT entries), there's no possibility or desire to optimize TLS
3052 relocs, and there's not much point in propagating relocs to shared
3053 libs that the dynamic linker won't relocate. */
3054 if ((sec->flags & SEC_ALLOC) == 0)
3055 return TRUE;
3056
3057 #ifdef DEBUG
3058 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3059 sec, abfd);
3060 #endif
3061
3062 /* Initialize howto table if not already done. */
3063 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3064 ppc_elf_howto_init ();
3065
3066 htab = ppc_elf_hash_table (info);
3067 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3068 sym_hashes = elf_sym_hashes (abfd);
3069 got2 = bfd_get_section_by_name (abfd, ".got2");
3070 sreloc = NULL;
3071
3072 rel_end = relocs + sec->reloc_count;
3073 for (rel = relocs; rel < rel_end; rel++)
3074 {
3075 unsigned long r_symndx;
3076 enum elf_ppc_reloc_type r_type;
3077 struct elf_link_hash_entry *h;
3078 int tls_type = 0;
3079
3080 r_symndx = ELF32_R_SYM (rel->r_info);
3081 if (r_symndx < symtab_hdr->sh_info)
3082 h = NULL;
3083 else
3084 {
3085 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3086 while (h->root.type == bfd_link_hash_indirect
3087 || h->root.type == bfd_link_hash_warning)
3088 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3089 }
3090
3091 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3092 This shows up in particular in an R_PPC_ADDR32 in the eabi
3093 startup code. */
3094 if (h != NULL
3095 && htab->got == NULL
3096 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3097 {
3098 if (htab->elf.dynobj == NULL)
3099 htab->elf.dynobj = abfd;
3100 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3101 return FALSE;
3102 BFD_ASSERT (h == htab->elf.hgot);
3103 }
3104
3105 r_type = ELF32_R_TYPE (rel->r_info);
3106 switch (r_type)
3107 {
3108 case R_PPC_GOT_TLSLD16:
3109 case R_PPC_GOT_TLSLD16_LO:
3110 case R_PPC_GOT_TLSLD16_HI:
3111 case R_PPC_GOT_TLSLD16_HA:
3112 tls_type = TLS_TLS | TLS_LD;
3113 goto dogottls;
3114
3115 case R_PPC_GOT_TLSGD16:
3116 case R_PPC_GOT_TLSGD16_LO:
3117 case R_PPC_GOT_TLSGD16_HI:
3118 case R_PPC_GOT_TLSGD16_HA:
3119 tls_type = TLS_TLS | TLS_GD;
3120 goto dogottls;
3121
3122 case R_PPC_GOT_TPREL16:
3123 case R_PPC_GOT_TPREL16_LO:
3124 case R_PPC_GOT_TPREL16_HI:
3125 case R_PPC_GOT_TPREL16_HA:
3126 if (info->shared)
3127 info->flags |= DF_STATIC_TLS;
3128 tls_type = TLS_TLS | TLS_TPREL;
3129 goto dogottls;
3130
3131 case R_PPC_GOT_DTPREL16:
3132 case R_PPC_GOT_DTPREL16_LO:
3133 case R_PPC_GOT_DTPREL16_HI:
3134 case R_PPC_GOT_DTPREL16_HA:
3135 tls_type = TLS_TLS | TLS_DTPREL;
3136 dogottls:
3137 sec->has_tls_reloc = 1;
3138 /* Fall thru */
3139
3140 /* GOT16 relocations */
3141 case R_PPC_GOT16:
3142 case R_PPC_GOT16_LO:
3143 case R_PPC_GOT16_HI:
3144 case R_PPC_GOT16_HA:
3145 /* This symbol requires a global offset table entry. */
3146 if (htab->got == NULL)
3147 {
3148 if (htab->elf.dynobj == NULL)
3149 htab->elf.dynobj = abfd;
3150 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3151 return FALSE;
3152 }
3153 if (h != NULL)
3154 {
3155 h->got.refcount += 1;
3156 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3157 }
3158 else
3159 /* This is a global offset table entry for a local symbol. */
3160 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3161 return FALSE;
3162 break;
3163
3164 /* Indirect .sdata relocation. */
3165 case R_PPC_EMB_SDAI16:
3166 if (info->shared)
3167 {
3168 bad_shared_reloc (abfd, r_type);
3169 return FALSE;
3170 }
3171 if (htab->sdata[0].section == NULL
3172 && !ppc_elf_create_linker_section (abfd, info, 0,
3173 &htab->sdata[0]))
3174 return FALSE;
3175 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3176 h, rel))
3177 return FALSE;
3178 if (h != NULL)
3179 {
3180 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3181 h->non_got_ref = TRUE;
3182 }
3183 break;
3184
3185 /* Indirect .sdata2 relocation. */
3186 case R_PPC_EMB_SDA2I16:
3187 if (info->shared)
3188 {
3189 bad_shared_reloc (abfd, r_type);
3190 return FALSE;
3191 }
3192 if (htab->sdata[1].section == NULL
3193 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3194 &htab->sdata[1]))
3195 return FALSE;
3196 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3197 h, rel))
3198 return FALSE;
3199 if (h != NULL)
3200 {
3201 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3202 h->non_got_ref = TRUE;
3203 }
3204 break;
3205
3206 case R_PPC_SDAREL16:
3207 if (info->shared)
3208 {
3209 bad_shared_reloc (abfd, r_type);
3210 return FALSE;
3211 }
3212 if (htab->sdata[0].sym == NULL
3213 && !create_sdata_sym (htab, &htab->sdata[0]))
3214 return FALSE;
3215 if (h != NULL)
3216 {
3217 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3218 h->non_got_ref = TRUE;
3219 }
3220 break;
3221
3222 case R_PPC_EMB_SDA2REL:
3223 if (info->shared)
3224 {
3225 bad_shared_reloc (abfd, r_type);
3226 return FALSE;
3227 }
3228 if (htab->sdata[1].sym == NULL
3229 && !create_sdata_sym (htab, &htab->sdata[1]))
3230 return FALSE;
3231 if (h != NULL)
3232 {
3233 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3234 h->non_got_ref = TRUE;
3235 }
3236 break;
3237
3238 case R_PPC_EMB_SDA21:
3239 case R_PPC_EMB_RELSDA:
3240 if (info->shared)
3241 {
3242 bad_shared_reloc (abfd, r_type);
3243 return FALSE;
3244 }
3245 if (htab->sdata[0].sym == NULL
3246 && !create_sdata_sym (htab, &htab->sdata[0]))
3247 return FALSE;
3248 if (htab->sdata[1].sym == NULL
3249 && !create_sdata_sym (htab, &htab->sdata[1]))
3250 return FALSE;
3251 if (h != NULL)
3252 {
3253 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3254 h->non_got_ref = TRUE;
3255 }
3256 break;
3257
3258 case R_PPC_EMB_NADDR32:
3259 case R_PPC_EMB_NADDR16:
3260 case R_PPC_EMB_NADDR16_LO:
3261 case R_PPC_EMB_NADDR16_HI:
3262 case R_PPC_EMB_NADDR16_HA:
3263 if (info->shared)
3264 {
3265 bad_shared_reloc (abfd, r_type);
3266 return FALSE;
3267 }
3268 if (h != NULL)
3269 h->non_got_ref = TRUE;
3270 break;
3271
3272 case R_PPC_PLT32:
3273 case R_PPC_PLTREL24:
3274 case R_PPC_PLTREL32:
3275 case R_PPC_PLT16_LO:
3276 case R_PPC_PLT16_HI:
3277 case R_PPC_PLT16_HA:
3278 #ifdef DEBUG
3279 fprintf (stderr, "Reloc requires a PLT entry\n");
3280 #endif
3281 /* This symbol requires a procedure linkage table entry. We
3282 actually build the entry in finish_dynamic_symbol,
3283 because this might be a case of linking PIC code without
3284 linking in any dynamic objects, in which case we don't
3285 need to generate a procedure linkage table after all. */
3286
3287 if (h == NULL)
3288 {
3289 /* It does not make sense to have a procedure linkage
3290 table entry for a local symbol. */
3291 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3292 "local symbol"),
3293 abfd,
3294 sec,
3295 (long) rel->r_offset,
3296 ppc_elf_howto_table[r_type]->name);
3297 bfd_set_error (bfd_error_bad_value);
3298 return FALSE;
3299 }
3300 else
3301 {
3302 bfd_vma addend = 0;
3303
3304 if (r_type == R_PPC_PLTREL24)
3305 {
3306 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3307 addend = rel->r_addend;
3308 }
3309 h->needs_plt = 1;
3310 if (!update_plt_info (abfd, h, got2, addend))
3311 return FALSE;
3312 }
3313 break;
3314
3315 /* The following relocations don't need to propagate the
3316 relocation if linking a shared object since they are
3317 section relative. */
3318 case R_PPC_SECTOFF:
3319 case R_PPC_SECTOFF_LO:
3320 case R_PPC_SECTOFF_HI:
3321 case R_PPC_SECTOFF_HA:
3322 case R_PPC_DTPREL16:
3323 case R_PPC_DTPREL16_LO:
3324 case R_PPC_DTPREL16_HI:
3325 case R_PPC_DTPREL16_HA:
3326 case R_PPC_TOC16:
3327 break;
3328
3329 case R_PPC_REL16:
3330 case R_PPC_REL16_LO:
3331 case R_PPC_REL16_HI:
3332 case R_PPC_REL16_HA:
3333 ppc_elf_tdata (abfd)->has_rel16 = 1;
3334 break;
3335
3336 /* These are just markers. */
3337 case R_PPC_TLS:
3338 case R_PPC_EMB_MRKREF:
3339 case R_PPC_NONE:
3340 case R_PPC_max:
3341 break;
3342
3343 /* These should only appear in dynamic objects. */
3344 case R_PPC_COPY:
3345 case R_PPC_GLOB_DAT:
3346 case R_PPC_JMP_SLOT:
3347 case R_PPC_RELATIVE:
3348 break;
3349
3350 /* These aren't handled yet. We'll report an error later. */
3351 case R_PPC_ADDR30:
3352 case R_PPC_EMB_RELSEC16:
3353 case R_PPC_EMB_RELST_LO:
3354 case R_PPC_EMB_RELST_HI:
3355 case R_PPC_EMB_RELST_HA:
3356 case R_PPC_EMB_BIT_FLD:
3357 break;
3358
3359 /* This refers only to functions defined in the shared library. */
3360 case R_PPC_LOCAL24PC:
3361 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3362 {
3363 htab->plt_type = PLT_OLD;
3364 htab->old_bfd = abfd;
3365 }
3366 break;
3367
3368 /* This relocation describes the C++ object vtable hierarchy.
3369 Reconstruct it for later use during GC. */
3370 case R_PPC_GNU_VTINHERIT:
3371 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3372 return FALSE;
3373 break;
3374
3375 /* This relocation describes which C++ vtable entries are actually
3376 used. Record for later use during GC. */
3377 case R_PPC_GNU_VTENTRY:
3378 BFD_ASSERT (h != NULL);
3379 if (h != NULL
3380 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3381 return FALSE;
3382 break;
3383
3384 /* We shouldn't really be seeing these. */
3385 case R_PPC_TPREL32:
3386 if (info->shared)
3387 info->flags |= DF_STATIC_TLS;
3388 goto dodyn;
3389
3390 /* Nor these. */
3391 case R_PPC_DTPMOD32:
3392 case R_PPC_DTPREL32:
3393 goto dodyn;
3394
3395 case R_PPC_TPREL16:
3396 case R_PPC_TPREL16_LO:
3397 case R_PPC_TPREL16_HI:
3398 case R_PPC_TPREL16_HA:
3399 if (info->shared)
3400 info->flags |= DF_STATIC_TLS;
3401 goto dodyn;
3402
3403 case R_PPC_REL32:
3404 if (h == NULL
3405 && got2 != NULL
3406 && (sec->flags & SEC_CODE) != 0
3407 && (info->shared || info->pie)
3408 && htab->plt_type == PLT_UNSET)
3409 {
3410 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3411 the start of a function, which assembles to a REL32
3412 reference to .got2. If we detect one of these, then
3413 force the old PLT layout because the linker cannot
3414 reliably deduce the GOT pointer value needed for
3415 PLT call stubs. */
3416 asection *s;
3417
3418 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3419 r_symndx);
3420 if (s == got2)
3421 {
3422 htab->plt_type = PLT_OLD;
3423 htab->old_bfd = abfd;
3424 }
3425 }
3426 if (h == NULL || h == htab->elf.hgot)
3427 break;
3428 goto dodyn1;
3429
3430 case R_PPC_REL24:
3431 case R_PPC_REL14:
3432 case R_PPC_REL14_BRTAKEN:
3433 case R_PPC_REL14_BRNTAKEN:
3434 if (h == NULL)
3435 break;
3436 if (h == htab->elf.hgot)
3437 {
3438 if (htab->plt_type == PLT_UNSET)
3439 {
3440 htab->plt_type = PLT_OLD;
3441 htab->old_bfd = abfd;
3442 }
3443 break;
3444 }
3445 /* fall through */
3446
3447 case R_PPC_ADDR32:
3448 case R_PPC_ADDR24:
3449 case R_PPC_ADDR16:
3450 case R_PPC_ADDR16_LO:
3451 case R_PPC_ADDR16_HI:
3452 case R_PPC_ADDR16_HA:
3453 case R_PPC_ADDR14:
3454 case R_PPC_ADDR14_BRTAKEN:
3455 case R_PPC_ADDR14_BRNTAKEN:
3456 case R_PPC_UADDR32:
3457 case R_PPC_UADDR16:
3458 dodyn1:
3459 if (h != NULL && !info->shared)
3460 {
3461 /* We may need a plt entry if the symbol turns out to be
3462 a function defined in a dynamic object. */
3463 if (!update_plt_info (abfd, h, NULL, 0))
3464 return FALSE;
3465
3466 /* We may need a copy reloc too. */
3467 h->non_got_ref = 1;
3468 }
3469
3470 dodyn:
3471 /* If we are creating a shared library, and this is a reloc
3472 against a global symbol, or a non PC relative reloc
3473 against a local symbol, then we need to copy the reloc
3474 into the shared library. However, if we are linking with
3475 -Bsymbolic, we do not need to copy a reloc against a
3476 global symbol which is defined in an object we are
3477 including in the link (i.e., DEF_REGULAR is set). At
3478 this point we have not seen all the input files, so it is
3479 possible that DEF_REGULAR is not set now but will be set
3480 later (it is never cleared). In case of a weak definition,
3481 DEF_REGULAR may be cleared later by a strong definition in
3482 a shared library. We account for that possibility below by
3483 storing information in the dyn_relocs field of the hash
3484 table entry. A similar situation occurs when creating
3485 shared libraries and symbol visibility changes render the
3486 symbol local.
3487
3488 If on the other hand, we are creating an executable, we
3489 may need to keep relocations for symbols satisfied by a
3490 dynamic library if we manage to avoid copy relocs for the
3491 symbol. */
3492 if ((info->shared
3493 && (MUST_BE_DYN_RELOC (r_type)
3494 || (h != NULL
3495 && (! info->symbolic
3496 || h->root.type == bfd_link_hash_defweak
3497 || !h->def_regular))))
3498 || (ELIMINATE_COPY_RELOCS
3499 && !info->shared
3500 && h != NULL
3501 && (h->root.type == bfd_link_hash_defweak
3502 || !h->def_regular)))
3503 {
3504 struct ppc_elf_dyn_relocs *p;
3505 struct ppc_elf_dyn_relocs **head;
3506
3507 #ifdef DEBUG
3508 fprintf (stderr,
3509 "ppc_elf_check_relocs needs to "
3510 "create relocation for %s\n",
3511 (h && h->root.root.string
3512 ? h->root.root.string : "<unknown>"));
3513 #endif
3514 if (sreloc == NULL)
3515 {
3516 const char *name;
3517
3518 name = (bfd_elf_string_from_elf_section
3519 (abfd,
3520 elf_elfheader (abfd)->e_shstrndx,
3521 elf_section_data (sec)->rel_hdr.sh_name));
3522 if (name == NULL)
3523 return FALSE;
3524
3525 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3526 && strcmp (bfd_get_section_name (abfd, sec),
3527 name + 5) == 0);
3528
3529 if (htab->elf.dynobj == NULL)
3530 htab->elf.dynobj = abfd;
3531 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3532 if (sreloc == NULL)
3533 {
3534 flagword flags;
3535
3536 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3537 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3538 | SEC_ALLOC | SEC_LOAD);
3539 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3540 name,
3541 flags);
3542 if (sreloc == NULL
3543 || ! bfd_set_section_alignment (htab->elf.dynobj,
3544 sreloc, 2))
3545 return FALSE;
3546 }
3547 elf_section_data (sec)->sreloc = sreloc;
3548 }
3549
3550 /* If this is a global symbol, we count the number of
3551 relocations we need for this symbol. */
3552 if (h != NULL)
3553 {
3554 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3555 }
3556 else
3557 {
3558 /* Track dynamic relocs needed for local syms too.
3559 We really need local syms available to do this
3560 easily. Oh well. */
3561
3562 asection *s;
3563 void *vpp;
3564
3565 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3566 sec, r_symndx);
3567 if (s == NULL)
3568 return FALSE;
3569
3570 vpp = &elf_section_data (s)->local_dynrel;
3571 head = (struct ppc_elf_dyn_relocs **) vpp;
3572 }
3573
3574 p = *head;
3575 if (p == NULL || p->sec != sec)
3576 {
3577 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3578 if (p == NULL)
3579 return FALSE;
3580 p->next = *head;
3581 *head = p;
3582 p->sec = sec;
3583 p->count = 0;
3584 p->pc_count = 0;
3585 }
3586
3587 p->count += 1;
3588 if (!MUST_BE_DYN_RELOC (r_type))
3589 p->pc_count += 1;
3590 }
3591
3592 break;
3593 }
3594 }
3595
3596 return TRUE;
3597 }
3598 \f
3599
3600 /* Merge object attributes from IBFD into OBFD. Raise an error if
3601 there are conflicting attributes. */
3602 static bfd_boolean
3603 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3604 {
3605 obj_attribute *in_attr, *in_attrs;
3606 obj_attribute *out_attr, *out_attrs;
3607
3608 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3609 {
3610 /* This is the first object. Copy the attributes. */
3611 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3612
3613 /* Use the Tag_null value to indicate the attributes have been
3614 initialized. */
3615 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3616
3617 return TRUE;
3618 }
3619
3620 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3621 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3622
3623 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3624 non-conflicting ones. */
3625 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3626 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3627 if (in_attr->i != out_attr->i)
3628 {
3629 out_attr->type = 1;
3630 if (out_attr->i == 0)
3631 out_attr->i = in_attr->i;
3632 else if (in_attr->i == 0)
3633 ;
3634 else if (out_attr->i == 1 && in_attr->i == 2)
3635 _bfd_error_handler
3636 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3637 else if (out_attr->i == 2 && in_attr->i == 1)
3638 _bfd_error_handler
3639 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3640 else if (in_attr->i > 2)
3641 _bfd_error_handler
3642 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3643 in_attr->i);
3644 else
3645 _bfd_error_handler
3646 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3647 out_attr->i);
3648 }
3649
3650 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3651 merge non-conflicting ones. */
3652 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3653 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3654 if (in_attr->i != out_attr->i)
3655 {
3656 const char *in_abi = NULL, *out_abi = NULL;
3657
3658 switch (in_attr->i)
3659 {
3660 case 1: in_abi = "generic"; break;
3661 case 2: in_abi = "AltiVec"; break;
3662 case 3: in_abi = "SPE"; break;
3663 }
3664
3665 switch (out_attr->i)
3666 {
3667 case 1: out_abi = "generic"; break;
3668 case 2: out_abi = "AltiVec"; break;
3669 case 3: out_abi = "SPE"; break;
3670 }
3671
3672 out_attr->type = 1;
3673 if (out_attr->i == 0)
3674 out_attr->i = in_attr->i;
3675 else if (in_attr->i == 0)
3676 ;
3677 /* For now, allow generic to transition to AltiVec or SPE
3678 without a warning. If GCC marked files with their stack
3679 alignment and used don't-care markings for files which are
3680 not affected by the vector ABI, we could warn about this
3681 case too. */
3682 else if (out_attr->i == 1)
3683 out_attr->i = in_attr->i;
3684 else if (in_attr->i == 1)
3685 ;
3686 else if (in_abi == NULL)
3687 _bfd_error_handler
3688 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3689 in_attr->i);
3690 else if (out_abi == NULL)
3691 _bfd_error_handler
3692 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3693 in_attr->i);
3694 else
3695 _bfd_error_handler
3696 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3697 ibfd, obfd, in_abi, out_abi);
3698 }
3699
3700 /* Merge Tag_compatibility attributes and any common GNU ones. */
3701 _bfd_elf_merge_object_attributes (ibfd, obfd);
3702
3703 return TRUE;
3704 }
3705
3706 /* Merge backend specific data from an object file to the output
3707 object file when linking. */
3708
3709 static bfd_boolean
3710 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3711 {
3712 flagword old_flags;
3713 flagword new_flags;
3714 bfd_boolean error;
3715
3716 if (!is_ppc_elf_target (ibfd->xvec)
3717 || !is_ppc_elf_target (obfd->xvec))
3718 return TRUE;
3719
3720 /* Check if we have the same endianess. */
3721 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3722 return FALSE;
3723
3724 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3725 return FALSE;
3726
3727 new_flags = elf_elfheader (ibfd)->e_flags;
3728 old_flags = elf_elfheader (obfd)->e_flags;
3729 if (!elf_flags_init (obfd))
3730 {
3731 /* First call, no flags set. */
3732 elf_flags_init (obfd) = TRUE;
3733 elf_elfheader (obfd)->e_flags = new_flags;
3734 }
3735
3736 /* Compatible flags are ok. */
3737 else if (new_flags == old_flags)
3738 ;
3739
3740 /* Incompatible flags. */
3741 else
3742 {
3743 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3744 to be linked with either. */
3745 error = FALSE;
3746 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3747 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3748 {
3749 error = TRUE;
3750 (*_bfd_error_handler)
3751 (_("%B: compiled with -mrelocatable and linked with "
3752 "modules compiled normally"), ibfd);
3753 }
3754 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3755 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3756 {
3757 error = TRUE;
3758 (*_bfd_error_handler)
3759 (_("%B: compiled normally and linked with "
3760 "modules compiled with -mrelocatable"), ibfd);
3761 }
3762
3763 /* The output is -mrelocatable-lib iff both the input files are. */
3764 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3765 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3766
3767 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3768 but each input file is either -mrelocatable or -mrelocatable-lib. */
3769 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3770 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3771 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3772 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3773
3774 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3775 any module uses it. */
3776 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3777
3778 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3779 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3780
3781 /* Warn about any other mismatches. */
3782 if (new_flags != old_flags)
3783 {
3784 error = TRUE;
3785 (*_bfd_error_handler)
3786 (_("%B: uses different e_flags (0x%lx) fields "
3787 "than previous modules (0x%lx)"),
3788 ibfd, (long) new_flags, (long) old_flags);
3789 }
3790
3791 if (error)
3792 {
3793 bfd_set_error (bfd_error_bad_value);
3794 return FALSE;
3795 }
3796 }
3797
3798 return TRUE;
3799 }
3800 \f
3801 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3802 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3803 int
3804 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3805 struct bfd_link_info *info,
3806 enum ppc_elf_plt_type plt_style,
3807 int emit_stub_syms)
3808 {
3809 struct ppc_elf_link_hash_table *htab;
3810 flagword flags;
3811
3812 htab = ppc_elf_hash_table (info);
3813
3814 if (htab->plt_type == PLT_UNSET)
3815 {
3816 if (plt_style == PLT_OLD)
3817 htab->plt_type = PLT_OLD;
3818 else
3819 {
3820 bfd *ibfd;
3821 enum ppc_elf_plt_type plt_type = plt_style;
3822
3823 /* Look through the reloc flags left by ppc_elf_check_relocs.
3824 Use the old style bss plt if a file makes plt calls
3825 without using the new relocs, and if ld isn't given
3826 --secure-plt and we never see REL16 relocs. */
3827 if (plt_type == PLT_UNSET)
3828 plt_type = PLT_OLD;
3829 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3830 if (is_ppc_elf_target (ibfd->xvec))
3831 {
3832 if (ppc_elf_tdata (ibfd)->has_rel16)
3833 plt_type = PLT_NEW;
3834 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3835 {
3836 plt_type = PLT_OLD;
3837 htab->old_bfd = ibfd;
3838 break;
3839 }
3840 }
3841 htab->plt_type = plt_type;
3842 }
3843 }
3844 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3845 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3846
3847 htab->emit_stub_syms = emit_stub_syms;
3848
3849 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3850
3851 if (htab->plt_type == PLT_NEW)
3852 {
3853 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3854 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3855
3856 /* The new PLT is a loaded section. */
3857 if (htab->plt != NULL
3858 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3859 return -1;
3860
3861 /* The new GOT is not executable. */
3862 if (htab->got != NULL
3863 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3864 return -1;
3865 }
3866 else
3867 {
3868 /* Stop an unused .glink section from affecting .text alignment. */
3869 if (htab->glink != NULL
3870 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3871 return -1;
3872 }
3873 return htab->plt_type == PLT_NEW;
3874 }
3875 \f
3876 /* Return the section that should be marked against GC for a given
3877 relocation. */
3878
3879 static asection *
3880 ppc_elf_gc_mark_hook (asection *sec,
3881 struct bfd_link_info *info,
3882 Elf_Internal_Rela *rel,
3883 struct elf_link_hash_entry *h,
3884 Elf_Internal_Sym *sym)
3885 {
3886 if (h != NULL)
3887 switch (ELF32_R_TYPE (rel->r_info))
3888 {
3889 case R_PPC_GNU_VTINHERIT:
3890 case R_PPC_GNU_VTENTRY:
3891 return NULL;
3892 }
3893
3894 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3895 }
3896
3897 /* Update the got, plt and dynamic reloc reference counts for the
3898 section being removed. */
3899
3900 static bfd_boolean
3901 ppc_elf_gc_sweep_hook (bfd *abfd,
3902 struct bfd_link_info *info,
3903 asection *sec,
3904 const Elf_Internal_Rela *relocs)
3905 {
3906 struct ppc_elf_link_hash_table *htab;
3907 Elf_Internal_Shdr *symtab_hdr;
3908 struct elf_link_hash_entry **sym_hashes;
3909 bfd_signed_vma *local_got_refcounts;
3910 const Elf_Internal_Rela *rel, *relend;
3911 asection *got2;
3912
3913 if ((sec->flags & SEC_ALLOC) == 0)
3914 return TRUE;
3915
3916 elf_section_data (sec)->local_dynrel = NULL;
3917
3918 htab = ppc_elf_hash_table (info);
3919 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3920 sym_hashes = elf_sym_hashes (abfd);
3921 local_got_refcounts = elf_local_got_refcounts (abfd);
3922 got2 = bfd_get_section_by_name (abfd, ".got2");
3923
3924 relend = relocs + sec->reloc_count;
3925 for (rel = relocs; rel < relend; rel++)
3926 {
3927 unsigned long r_symndx;
3928 enum elf_ppc_reloc_type r_type;
3929 struct elf_link_hash_entry *h = NULL;
3930
3931 r_symndx = ELF32_R_SYM (rel->r_info);
3932 if (r_symndx >= symtab_hdr->sh_info)
3933 {
3934 struct ppc_elf_dyn_relocs **pp, *p;
3935 struct ppc_elf_link_hash_entry *eh;
3936
3937 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3938 while (h->root.type == bfd_link_hash_indirect
3939 || h->root.type == bfd_link_hash_warning)
3940 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3941 eh = (struct ppc_elf_link_hash_entry *) h;
3942
3943 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3944 if (p->sec == sec)
3945 {
3946 /* Everything must go for SEC. */
3947 *pp = p->next;
3948 break;
3949 }
3950 }
3951
3952 r_type = ELF32_R_TYPE (rel->r_info);
3953 switch (r_type)
3954 {
3955 case R_PPC_GOT_TLSLD16:
3956 case R_PPC_GOT_TLSLD16_LO:
3957 case R_PPC_GOT_TLSLD16_HI:
3958 case R_PPC_GOT_TLSLD16_HA:
3959 case R_PPC_GOT_TLSGD16:
3960 case R_PPC_GOT_TLSGD16_LO:
3961 case R_PPC_GOT_TLSGD16_HI:
3962 case R_PPC_GOT_TLSGD16_HA:
3963 case R_PPC_GOT_TPREL16:
3964 case R_PPC_GOT_TPREL16_LO:
3965 case R_PPC_GOT_TPREL16_HI:
3966 case R_PPC_GOT_TPREL16_HA:
3967 case R_PPC_GOT_DTPREL16:
3968 case R_PPC_GOT_DTPREL16_LO:
3969 case R_PPC_GOT_DTPREL16_HI:
3970 case R_PPC_GOT_DTPREL16_HA:
3971 case R_PPC_GOT16:
3972 case R_PPC_GOT16_LO:
3973 case R_PPC_GOT16_HI:
3974 case R_PPC_GOT16_HA:
3975 if (h != NULL)
3976 {
3977 if (h->got.refcount > 0)
3978 h->got.refcount--;
3979 }
3980 else if (local_got_refcounts != NULL)
3981 {
3982 if (local_got_refcounts[r_symndx] > 0)
3983 local_got_refcounts[r_symndx]--;
3984 }
3985 break;
3986
3987 case R_PPC_REL24:
3988 case R_PPC_REL14:
3989 case R_PPC_REL14_BRTAKEN:
3990 case R_PPC_REL14_BRNTAKEN:
3991 case R_PPC_REL32:
3992 if (h == NULL || h == htab->elf.hgot)
3993 break;
3994 /* Fall thru */
3995
3996 case R_PPC_ADDR32:
3997 case R_PPC_ADDR24:
3998 case R_PPC_ADDR16:
3999 case R_PPC_ADDR16_LO:
4000 case R_PPC_ADDR16_HI:
4001 case R_PPC_ADDR16_HA:
4002 case R_PPC_ADDR14:
4003 case R_PPC_ADDR14_BRTAKEN:
4004 case R_PPC_ADDR14_BRNTAKEN:
4005 case R_PPC_UADDR32:
4006 case R_PPC_UADDR16:
4007 if (info->shared)
4008 break;
4009
4010 case R_PPC_PLT32:
4011 case R_PPC_PLTREL24:
4012 case R_PPC_PLTREL32:
4013 case R_PPC_PLT16_LO:
4014 case R_PPC_PLT16_HI:
4015 case R_PPC_PLT16_HA:
4016 if (h != NULL)
4017 {
4018 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4019 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4020 if (ent->plt.refcount > 0)
4021 ent->plt.refcount -= 1;
4022 }
4023 break;
4024
4025 default:
4026 break;
4027 }
4028 }
4029 return TRUE;
4030 }
4031 \f
4032 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4033
4034 asection *
4035 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4036 {
4037 struct ppc_elf_link_hash_table *htab;
4038
4039 htab = ppc_elf_hash_table (info);
4040 if (htab->plt_type == PLT_NEW
4041 && htab->plt != NULL
4042 && htab->plt->output_section != NULL)
4043 {
4044 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4045 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4046 }
4047
4048 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4049 FALSE, FALSE, TRUE);
4050 return _bfd_elf_tls_setup (obfd, info);
4051 }
4052
4053 /* Run through all the TLS relocs looking for optimization
4054 opportunities. */
4055
4056 bfd_boolean
4057 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4058 struct bfd_link_info *info)
4059 {
4060 bfd *ibfd;
4061 asection *sec;
4062 struct ppc_elf_link_hash_table *htab;
4063 int pass;
4064
4065 if (info->relocatable || info->shared)
4066 return TRUE;
4067
4068 htab = ppc_elf_hash_table (info);
4069 /* Make two passes through the relocs. First time check that tls
4070 relocs involved in setting up a tls_get_addr call are indeed
4071 followed by such a call. If they are not, exclude them from
4072 the optimizations done on the second pass. */
4073 for (pass = 0; pass < 2; ++pass)
4074 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4075 {
4076 Elf_Internal_Sym *locsyms = NULL;
4077 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4078
4079 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4080 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4081 {
4082 Elf_Internal_Rela *relstart, *rel, *relend;
4083
4084 /* Read the relocations. */
4085 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4086 info->keep_memory);
4087 if (relstart == NULL)
4088 return FALSE;
4089
4090 relend = relstart + sec->reloc_count;
4091 for (rel = relstart; rel < relend; rel++)
4092 {
4093 enum elf_ppc_reloc_type r_type;
4094 unsigned long r_symndx;
4095 struct elf_link_hash_entry *h = NULL;
4096 char *tls_mask;
4097 char tls_set, tls_clear;
4098 bfd_boolean is_local;
4099 int expecting_tls_get_addr;
4100 bfd_signed_vma *got_count;
4101
4102 r_symndx = ELF32_R_SYM (rel->r_info);
4103 if (r_symndx >= symtab_hdr->sh_info)
4104 {
4105 struct elf_link_hash_entry **sym_hashes;
4106
4107 sym_hashes = elf_sym_hashes (ibfd);
4108 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4109 while (h->root.type == bfd_link_hash_indirect
4110 || h->root.type == bfd_link_hash_warning)
4111 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4112 }
4113
4114 expecting_tls_get_addr = 0;
4115 is_local = FALSE;
4116 if (h == NULL
4117 || !h->def_dynamic)
4118 is_local = TRUE;
4119
4120 r_type = ELF32_R_TYPE (rel->r_info);
4121 switch (r_type)
4122 {
4123 case R_PPC_GOT_TLSLD16:
4124 case R_PPC_GOT_TLSLD16_LO:
4125 expecting_tls_get_addr = 1;
4126 /* Fall thru */
4127
4128 case R_PPC_GOT_TLSLD16_HI:
4129 case R_PPC_GOT_TLSLD16_HA:
4130 /* These relocs should never be against a symbol
4131 defined in a shared lib. Leave them alone if
4132 that turns out to be the case. */
4133 if (!is_local)
4134 continue;
4135
4136 /* LD -> LE */
4137 tls_set = 0;
4138 tls_clear = TLS_LD;
4139 break;
4140
4141 case R_PPC_GOT_TLSGD16:
4142 case R_PPC_GOT_TLSGD16_LO:
4143 expecting_tls_get_addr = 1;
4144 /* Fall thru */
4145
4146 case R_PPC_GOT_TLSGD16_HI:
4147 case R_PPC_GOT_TLSGD16_HA:
4148 if (is_local)
4149 /* GD -> LE */
4150 tls_set = 0;
4151 else
4152 /* GD -> IE */
4153 tls_set = TLS_TLS | TLS_TPRELGD;
4154 tls_clear = TLS_GD;
4155 break;
4156
4157 case R_PPC_GOT_TPREL16:
4158 case R_PPC_GOT_TPREL16_LO:
4159 case R_PPC_GOT_TPREL16_HI:
4160 case R_PPC_GOT_TPREL16_HA:
4161 if (is_local)
4162 {
4163 /* IE -> LE */
4164 tls_set = 0;
4165 tls_clear = TLS_TPREL;
4166 break;
4167 }
4168 else
4169 continue;
4170
4171 default:
4172 continue;
4173 }
4174
4175 if (pass == 0)
4176 {
4177 if (!expecting_tls_get_addr)
4178 continue;
4179
4180 if (rel + 1 < relend)
4181 {
4182 enum elf_ppc_reloc_type r_type2;
4183 unsigned long r_symndx2;
4184 struct elf_link_hash_entry *h2;
4185
4186 /* The next instruction should be a call to
4187 __tls_get_addr. Peek at the reloc to be sure. */
4188 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4189 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4190 if (r_symndx2 >= symtab_hdr->sh_info
4191 && (r_type2 == R_PPC_REL14
4192 || r_type2 == R_PPC_REL14_BRTAKEN
4193 || r_type2 == R_PPC_REL14_BRNTAKEN
4194 || r_type2 == R_PPC_REL24
4195 || r_type2 == R_PPC_PLTREL24))
4196 {
4197 struct elf_link_hash_entry **sym_hashes;
4198
4199 sym_hashes = elf_sym_hashes (ibfd);
4200 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4201 while (h2->root.type == bfd_link_hash_indirect
4202 || h2->root.type == bfd_link_hash_warning)
4203 h2 = ((struct elf_link_hash_entry *)
4204 h2->root.u.i.link);
4205 if (h2 == htab->tls_get_addr)
4206 continue;
4207 }
4208 }
4209
4210 /* Uh oh, we didn't find the expected call. We
4211 could just mark this symbol to exclude it
4212 from tls optimization but it's safer to skip
4213 the entire section. */
4214 sec->has_tls_reloc = 0;
4215 break;
4216 }
4217
4218 if (h != NULL)
4219 {
4220 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4221 got_count = &h->got.refcount;
4222 }
4223 else
4224 {
4225 Elf_Internal_Sym *sym;
4226 bfd_signed_vma *lgot_refs;
4227 char *lgot_masks;
4228
4229 if (locsyms == NULL)
4230 {
4231 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4232 if (locsyms == NULL)
4233 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4234 symtab_hdr->sh_info,
4235 0, NULL, NULL, NULL);
4236 if (locsyms == NULL)
4237 {
4238 if (elf_section_data (sec)->relocs != relstart)
4239 free (relstart);
4240 return FALSE;
4241 }
4242 }
4243 sym = locsyms + r_symndx;
4244 lgot_refs = elf_local_got_refcounts (ibfd);
4245 if (lgot_refs == NULL)
4246 abort ();
4247 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4248 tls_mask = &lgot_masks[r_symndx];
4249 got_count = &lgot_refs[r_symndx];
4250 }
4251
4252 if (tls_set == 0)
4253 {
4254 /* We managed to get rid of a got entry. */
4255 if (*got_count > 0)
4256 *got_count -= 1;
4257 }
4258
4259 if (expecting_tls_get_addr)
4260 {
4261 struct plt_entry *ent;
4262
4263 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4264 if (ent != NULL && ent->plt.refcount > 0)
4265 ent->plt.refcount -= 1;
4266 }
4267
4268 *tls_mask |= tls_set;
4269 *tls_mask &= ~tls_clear;
4270 }
4271
4272 if (elf_section_data (sec)->relocs != relstart)
4273 free (relstart);
4274 }
4275
4276 if (locsyms != NULL
4277 && (symtab_hdr->contents != (unsigned char *) locsyms))
4278 {
4279 if (!info->keep_memory)
4280 free (locsyms);
4281 else
4282 symtab_hdr->contents = (unsigned char *) locsyms;
4283 }
4284 }
4285 return TRUE;
4286 }
4287 \f
4288 /* Adjust a symbol defined by a dynamic object and referenced by a
4289 regular object. The current definition is in some section of the
4290 dynamic object, but we're not including those sections. We have to
4291 change the definition to something the rest of the link can
4292 understand. */
4293
4294 static bfd_boolean
4295 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4296 struct elf_link_hash_entry *h)
4297 {
4298 struct ppc_elf_link_hash_table *htab;
4299 asection *s;
4300
4301 #ifdef DEBUG
4302 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4303 h->root.root.string);
4304 #endif
4305
4306 /* Make sure we know what is going on here. */
4307 htab = ppc_elf_hash_table (info);
4308 BFD_ASSERT (htab->elf.dynobj != NULL
4309 && (h->needs_plt
4310 || h->u.weakdef != NULL
4311 || (h->def_dynamic
4312 && h->ref_regular
4313 && !h->def_regular)));
4314
4315 /* Deal with function syms. */
4316 if (h->type == STT_FUNC
4317 || h->needs_plt)
4318 {
4319 /* Clear procedure linkage table information for any symbol that
4320 won't need a .plt entry. */
4321 struct plt_entry *ent;
4322 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4323 if (ent->plt.refcount > 0)
4324 break;
4325 if (ent == NULL
4326 || SYMBOL_CALLS_LOCAL (info, h)
4327 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4328 && h->root.type == bfd_link_hash_undefweak))
4329 {
4330 /* A PLT entry is not required/allowed when:
4331
4332 1. We are not using ld.so; because then the PLT entry
4333 can't be set up, so we can't use one. In this case,
4334 ppc_elf_adjust_dynamic_symbol won't even be called.
4335
4336 2. GC has rendered the entry unused.
4337
4338 3. We know for certain that a call to this symbol
4339 will go to this object, or will remain undefined. */
4340 h->plt.plist = NULL;
4341 h->needs_plt = 0;
4342 }
4343 return TRUE;
4344 }
4345 else
4346 h->plt.plist = NULL;
4347
4348 /* If this is a weak symbol, and there is a real definition, the
4349 processor independent code will have arranged for us to see the
4350 real definition first, and we can just use the same value. */
4351 if (h->u.weakdef != NULL)
4352 {
4353 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4354 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4355 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4356 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4357 if (ELIMINATE_COPY_RELOCS)
4358 h->non_got_ref = h->u.weakdef->non_got_ref;
4359 return TRUE;
4360 }
4361
4362 /* This is a reference to a symbol defined by a dynamic object which
4363 is not a function. */
4364
4365 /* If we are creating a shared library, we must presume that the
4366 only references to the symbol are via the global offset table.
4367 For such cases we need not do anything here; the relocations will
4368 be handled correctly by relocate_section. */
4369 if (info->shared)
4370 return TRUE;
4371
4372 /* If there are no references to this symbol that do not use the
4373 GOT, we don't need to generate a copy reloc. */
4374 if (!h->non_got_ref)
4375 return TRUE;
4376
4377 /* If we didn't find any dynamic relocs in read-only sections, then
4378 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4379 We can't do this if there are any small data relocations. This
4380 doesn't work on VxWorks, where we can not have dynamic
4381 relocations (other than copy and jump slot relocations) in an
4382 executable. */
4383 if (ELIMINATE_COPY_RELOCS
4384 && !ppc_elf_hash_entry (h)->has_sda_refs
4385 && !htab->is_vxworks)
4386 {
4387 struct ppc_elf_dyn_relocs *p;
4388 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4389 {
4390 s = p->sec->output_section;
4391 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4392 break;
4393 }
4394
4395 if (p == NULL)
4396 {
4397 h->non_got_ref = 0;
4398 return TRUE;
4399 }
4400 }
4401
4402 if (h->size == 0)
4403 {
4404 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4405 h->root.root.string);
4406 return TRUE;
4407 }
4408
4409 /* We must allocate the symbol in our .dynbss section, which will
4410 become part of the .bss section of the executable. There will be
4411 an entry for this symbol in the .dynsym section. The dynamic
4412 object will contain position independent code, so all references
4413 from the dynamic object to this symbol will go through the global
4414 offset table. The dynamic linker will use the .dynsym entry to
4415 determine the address it must put in the global offset table, so
4416 both the dynamic object and the regular object will refer to the
4417 same memory location for the variable.
4418
4419 Of course, if the symbol is referenced using SDAREL relocs, we
4420 must instead allocate it in .sbss. */
4421
4422 if (ppc_elf_hash_entry (h)->has_sda_refs)
4423 s = htab->dynsbss;
4424 else
4425 s = htab->dynbss;
4426 BFD_ASSERT (s != NULL);
4427
4428 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4429 copy the initial value out of the dynamic object and into the
4430 runtime process image. We need to remember the offset into the
4431 .rela.bss section we are going to use. */
4432 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4433 {
4434 asection *srel;
4435
4436 if (ppc_elf_hash_entry (h)->has_sda_refs)
4437 srel = htab->relsbss;
4438 else
4439 srel = htab->relbss;
4440 BFD_ASSERT (srel != NULL);
4441 srel->size += sizeof (Elf32_External_Rela);
4442 h->needs_copy = 1;
4443 }
4444
4445 return _bfd_elf_adjust_dynamic_copy (h, s);
4446 }
4447 \f
4448 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4449 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4450 specifying the addend on the plt relocation. For -fpic code, the sym
4451 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4452 xxxxxxxx.got2.plt_pic32.<callee>. */
4453
4454 static bfd_boolean
4455 add_stub_sym (struct plt_entry *ent,
4456 struct elf_link_hash_entry *h,
4457 struct bfd_link_info *info)
4458 {
4459 struct elf_link_hash_entry *sh;
4460 size_t len1, len2, len3;
4461 char *name;
4462 const char *stub;
4463 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4464
4465 if (info->shared || info->pie)
4466 stub = ".plt_pic32.";
4467 else
4468 stub = ".plt_call32.";
4469
4470 len1 = strlen (h->root.root.string);
4471 len2 = strlen (stub);
4472 len3 = 0;
4473 if (ent->sec)
4474 len3 = strlen (ent->sec->name);
4475 name = bfd_malloc (len1 + len2 + len3 + 9);
4476 if (name == NULL)
4477 return FALSE;
4478 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4479 if (ent->sec)
4480 memcpy (name + 8, ent->sec->name, len3);
4481 memcpy (name + 8 + len3, stub, len2);
4482 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4483 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4484 if (sh == NULL)
4485 return FALSE;
4486 if (sh->root.type == bfd_link_hash_new)
4487 {
4488 sh->root.type = bfd_link_hash_defined;
4489 sh->root.u.def.section = htab->glink;
4490 sh->root.u.def.value = ent->glink_offset;
4491 sh->ref_regular = 1;
4492 sh->def_regular = 1;
4493 sh->ref_regular_nonweak = 1;
4494 sh->forced_local = 1;
4495 sh->non_elf = 0;
4496 }
4497 return TRUE;
4498 }
4499
4500 /* Allocate NEED contiguous space in .got, and return the offset.
4501 Handles allocation of the got header when crossing 32k. */
4502
4503 static bfd_vma
4504 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4505 {
4506 bfd_vma where;
4507 unsigned int max_before_header;
4508
4509 if (htab->plt_type == PLT_VXWORKS)
4510 {
4511 where = htab->got->size;
4512 htab->got->size += need;
4513 }
4514 else
4515 {
4516 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4517 if (need <= htab->got_gap)
4518 {
4519 where = max_before_header - htab->got_gap;
4520 htab->got_gap -= need;
4521 }
4522 else
4523 {
4524 if (htab->got->size + need > max_before_header
4525 && htab->got->size <= max_before_header)
4526 {
4527 htab->got_gap = max_before_header - htab->got->size;
4528 htab->got->size = max_before_header + htab->got_header_size;
4529 }
4530 where = htab->got->size;
4531 htab->got->size += need;
4532 }
4533 }
4534 return where;
4535 }
4536
4537 /* Allocate space in associated reloc sections for dynamic relocs. */
4538
4539 static bfd_boolean
4540 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4541 {
4542 struct bfd_link_info *info = inf;
4543 struct ppc_elf_link_hash_entry *eh;
4544 struct ppc_elf_link_hash_table *htab;
4545 struct ppc_elf_dyn_relocs *p;
4546
4547 if (h->root.type == bfd_link_hash_indirect)
4548 return TRUE;
4549
4550 if (h->root.type == bfd_link_hash_warning)
4551 /* When warning symbols are created, they **replace** the "real"
4552 entry in the hash table, thus we never get to see the real
4553 symbol in a hash traversal. So look at it now. */
4554 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4555
4556 htab = ppc_elf_hash_table (info);
4557 if (htab->elf.dynamic_sections_created)
4558 {
4559 struct plt_entry *ent;
4560 bfd_boolean doneone = FALSE;
4561 bfd_vma plt_offset = 0, glink_offset = 0;
4562
4563 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4564 if (ent->plt.refcount > 0)
4565 {
4566 /* Make sure this symbol is output as a dynamic symbol. */
4567 if (h->dynindx == -1
4568 && !h->forced_local)
4569 {
4570 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4571 return FALSE;
4572 }
4573
4574 if (info->shared
4575 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4576 {
4577 asection *s = htab->plt;
4578
4579 if (htab->plt_type == PLT_NEW)
4580 {
4581 if (!doneone)
4582 {
4583 plt_offset = s->size;
4584 s->size += 4;
4585 }
4586 ent->plt.offset = plt_offset;
4587
4588 s = htab->glink;
4589 if (!doneone || info->shared || info->pie)
4590 {
4591 glink_offset = s->size;
4592 s->size += GLINK_ENTRY_SIZE;
4593 }
4594 if (!doneone
4595 && !info->shared
4596 && !h->def_regular)
4597 {
4598 h->root.u.def.section = s;
4599 h->root.u.def.value = glink_offset;
4600 }
4601 ent->glink_offset = glink_offset;
4602
4603 if (htab->emit_stub_syms
4604 && !add_stub_sym (ent, h, info))
4605 return FALSE;
4606 }
4607 else
4608 {
4609 if (!doneone)
4610 {
4611 /* If this is the first .plt entry, make room
4612 for the special first entry. */
4613 if (s->size == 0)
4614 s->size += htab->plt_initial_entry_size;
4615
4616 /* The PowerPC PLT is actually composed of two
4617 parts, the first part is 2 words (for a load
4618 and a jump), and then there is a remaining
4619 word available at the end. */
4620 plt_offset = (htab->plt_initial_entry_size
4621 + (htab->plt_slot_size
4622 * ((s->size
4623 - htab->plt_initial_entry_size)
4624 / htab->plt_entry_size)));
4625
4626 /* If this symbol is not defined in a regular
4627 file, and we are not generating a shared
4628 library, then set the symbol to this location
4629 in the .plt. This is required to make
4630 function pointers compare as equal between
4631 the normal executable and the shared library. */
4632 if (! info->shared
4633 && !h->def_regular)
4634 {
4635 h->root.u.def.section = s;
4636 h->root.u.def.value = plt_offset;
4637 }
4638
4639 /* Make room for this entry. */
4640 s->size += htab->plt_entry_size;
4641 /* After the 8192nd entry, room for two entries
4642 is allocated. */
4643 if (htab->plt_type == PLT_OLD
4644 && (s->size - htab->plt_initial_entry_size)
4645 / htab->plt_entry_size
4646 > PLT_NUM_SINGLE_ENTRIES)
4647 s->size += htab->plt_entry_size;
4648 }
4649 ent->plt.offset = plt_offset;
4650 }
4651
4652 /* We also need to make an entry in the .rela.plt section. */
4653 if (!doneone)
4654 {
4655 htab->relplt->size += sizeof (Elf32_External_Rela);
4656
4657 if (htab->plt_type == PLT_VXWORKS)
4658 {
4659 /* Allocate space for the unloaded relocations. */
4660 if (!info->shared)
4661 {
4662 if (ent->plt.offset
4663 == (bfd_vma) htab->plt_initial_entry_size)
4664 {
4665 htab->srelplt2->size
4666 += sizeof (Elf32_External_Rela)
4667 * VXWORKS_PLTRESOLVE_RELOCS;
4668 }
4669
4670 htab->srelplt2->size
4671 += sizeof (Elf32_External_Rela)
4672 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4673 }
4674
4675 /* Every PLT entry has an associated GOT entry in
4676 .got.plt. */
4677 htab->sgotplt->size += 4;
4678 }
4679 doneone = TRUE;
4680 }
4681 }
4682 else
4683 ent->plt.offset = (bfd_vma) -1;
4684 }
4685 else
4686 ent->plt.offset = (bfd_vma) -1;
4687
4688 if (!doneone)
4689 {
4690 h->plt.plist = NULL;
4691 h->needs_plt = 0;
4692 }
4693 }
4694 else
4695 {
4696 h->plt.plist = NULL;
4697 h->needs_plt = 0;
4698 }
4699
4700 eh = (struct ppc_elf_link_hash_entry *) h;
4701 if (eh->elf.got.refcount > 0)
4702 {
4703 /* Make sure this symbol is output as a dynamic symbol. */
4704 if (eh->elf.dynindx == -1
4705 && !eh->elf.forced_local)
4706 {
4707 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4708 return FALSE;
4709 }
4710
4711 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4712 && !eh->elf.def_dynamic)
4713 {
4714 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4715 htab->tlsld_got.refcount += 1;
4716 eh->elf.got.offset = (bfd_vma) -1;
4717 }
4718 else
4719 {
4720 bfd_boolean dyn;
4721 unsigned int need = 0;
4722 if ((eh->tls_mask & TLS_TLS) != 0)
4723 {
4724 if ((eh->tls_mask & TLS_LD) != 0)
4725 need += 8;
4726 if ((eh->tls_mask & TLS_GD) != 0)
4727 need += 8;
4728 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4729 need += 4;
4730 if ((eh->tls_mask & TLS_DTPREL) != 0)
4731 need += 4;
4732 }
4733 else
4734 need += 4;
4735 eh->elf.got.offset = allocate_got (htab, need);
4736 dyn = htab->elf.dynamic_sections_created;
4737 if ((info->shared
4738 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4739 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4740 || eh->elf.root.type != bfd_link_hash_undefweak))
4741 {
4742 /* All the entries we allocated need relocs.
4743 Except LD only needs one. */
4744 if ((eh->tls_mask & TLS_LD) != 0)
4745 need -= 4;
4746 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4747 }
4748 }
4749 }
4750 else
4751 eh->elf.got.offset = (bfd_vma) -1;
4752
4753 if (eh->dyn_relocs == NULL)
4754 return TRUE;
4755
4756 /* In the shared -Bsymbolic case, discard space allocated for
4757 dynamic pc-relative relocs against symbols which turn out to be
4758 defined in regular objects. For the normal shared case, discard
4759 space for relocs that have become local due to symbol visibility
4760 changes. */
4761
4762 if (info->shared)
4763 {
4764 /* Relocs that use pc_count are those that appear on a call insn,
4765 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4766 generated via assembly. We want calls to protected symbols to
4767 resolve directly to the function rather than going via the plt.
4768 If people want function pointer comparisons to work as expected
4769 then they should avoid writing weird assembly. */
4770 if (SYMBOL_CALLS_LOCAL (info, h))
4771 {
4772 struct ppc_elf_dyn_relocs **pp;
4773
4774 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4775 {
4776 p->count -= p->pc_count;
4777 p->pc_count = 0;
4778 if (p->count == 0)
4779 *pp = p->next;
4780 else
4781 pp = &p->next;
4782 }
4783 }
4784
4785 /* Also discard relocs on undefined weak syms with non-default
4786 visibility. */
4787 if (eh->dyn_relocs != NULL
4788 && h->root.type == bfd_link_hash_undefweak)
4789 {
4790 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4791 eh->dyn_relocs = NULL;
4792
4793 /* Make sure undefined weak symbols are output as a dynamic
4794 symbol in PIEs. */
4795 else if (h->dynindx == -1
4796 && !h->forced_local)
4797 {
4798 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4799 return FALSE;
4800 }
4801 }
4802 }
4803 else if (ELIMINATE_COPY_RELOCS)
4804 {
4805 /* For the non-shared case, discard space for relocs against
4806 symbols which turn out to need copy relocs or are not
4807 dynamic. */
4808
4809 if (!h->non_got_ref
4810 && h->def_dynamic
4811 && !h->def_regular)
4812 {
4813 /* Make sure this symbol is output as a dynamic symbol.
4814 Undefined weak syms won't yet be marked as dynamic. */
4815 if (h->dynindx == -1
4816 && !h->forced_local)
4817 {
4818 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4819 return FALSE;
4820 }
4821
4822 /* If that succeeded, we know we'll be keeping all the
4823 relocs. */
4824 if (h->dynindx != -1)
4825 goto keep;
4826 }
4827
4828 eh->dyn_relocs = NULL;
4829
4830 keep: ;
4831 }
4832
4833 /* Finally, allocate space. */
4834 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4835 {
4836 asection *sreloc = elf_section_data (p->sec)->sreloc;
4837 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4838 }
4839
4840 return TRUE;
4841 }
4842
4843 /* Find any dynamic relocs that apply to read-only sections. */
4844
4845 static bfd_boolean
4846 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4847 {
4848 struct ppc_elf_dyn_relocs *p;
4849
4850 if (h->root.type == bfd_link_hash_indirect)
4851 return TRUE;
4852
4853 if (h->root.type == bfd_link_hash_warning)
4854 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4855
4856 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4857 {
4858 asection *s = p->sec->output_section;
4859
4860 if (s != NULL
4861 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4862 == (SEC_READONLY | SEC_ALLOC)))
4863 {
4864 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4865
4866 /* Not an error, just cut short the traversal. */
4867 return FALSE;
4868 }
4869 }
4870 return TRUE;
4871 }
4872
4873 /* Set the sizes of the dynamic sections. */
4874
4875 static bfd_boolean
4876 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4877 struct bfd_link_info *info)
4878 {
4879 struct ppc_elf_link_hash_table *htab;
4880 asection *s;
4881 bfd_boolean relocs;
4882 bfd *ibfd;
4883
4884 #ifdef DEBUG
4885 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4886 #endif
4887
4888 htab = ppc_elf_hash_table (info);
4889 BFD_ASSERT (htab->elf.dynobj != NULL);
4890
4891 if (elf_hash_table (info)->dynamic_sections_created)
4892 {
4893 /* Set the contents of the .interp section to the interpreter. */
4894 if (info->executable)
4895 {
4896 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4897 BFD_ASSERT (s != NULL);
4898 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4899 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4900 }
4901 }
4902
4903 if (htab->plt_type == PLT_OLD)
4904 htab->got_header_size = 16;
4905 else if (htab->plt_type == PLT_NEW)
4906 htab->got_header_size = 12;
4907
4908 /* Set up .got offsets for local syms, and space for local dynamic
4909 relocs. */
4910 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4911 {
4912 bfd_signed_vma *local_got;
4913 bfd_signed_vma *end_local_got;
4914 char *lgot_masks;
4915 bfd_size_type locsymcount;
4916 Elf_Internal_Shdr *symtab_hdr;
4917
4918 if (!is_ppc_elf_target (ibfd->xvec))
4919 continue;
4920
4921 for (s = ibfd->sections; s != NULL; s = s->next)
4922 {
4923 struct ppc_elf_dyn_relocs *p;
4924
4925 for (p = ((struct ppc_elf_dyn_relocs *)
4926 elf_section_data (s)->local_dynrel);
4927 p != NULL;
4928 p = p->next)
4929 {
4930 if (!bfd_is_abs_section (p->sec)
4931 && bfd_is_abs_section (p->sec->output_section))
4932 {
4933 /* Input section has been discarded, either because
4934 it is a copy of a linkonce section or due to
4935 linker script /DISCARD/, so we'll be discarding
4936 the relocs too. */
4937 }
4938 else if (p->count != 0)
4939 {
4940 elf_section_data (p->sec)->sreloc->size
4941 += p->count * sizeof (Elf32_External_Rela);
4942 if ((p->sec->output_section->flags
4943 & (SEC_READONLY | SEC_ALLOC))
4944 == (SEC_READONLY | SEC_ALLOC))
4945 info->flags |= DF_TEXTREL;
4946 }
4947 }
4948 }
4949
4950 local_got = elf_local_got_refcounts (ibfd);
4951 if (!local_got)
4952 continue;
4953
4954 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4955 locsymcount = symtab_hdr->sh_info;
4956 end_local_got = local_got + locsymcount;
4957 lgot_masks = (char *) end_local_got;
4958 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4959 if (*local_got > 0)
4960 {
4961 if (*lgot_masks == (TLS_TLS | TLS_LD))
4962 {
4963 /* If just an LD reloc, we'll just use
4964 htab->tlsld_got.offset. */
4965 htab->tlsld_got.refcount += 1;
4966 *local_got = (bfd_vma) -1;
4967 }
4968 else
4969 {
4970 unsigned int need = 0;
4971 if ((*lgot_masks & TLS_TLS) != 0)
4972 {
4973 if ((*lgot_masks & TLS_GD) != 0)
4974 need += 8;
4975 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4976 need += 4;
4977 if ((*lgot_masks & TLS_DTPREL) != 0)
4978 need += 4;
4979 }
4980 else
4981 need += 4;
4982 *local_got = allocate_got (htab, need);
4983 if (info->shared)
4984 htab->relgot->size += (need
4985 * (sizeof (Elf32_External_Rela) / 4));
4986 }
4987 }
4988 else
4989 *local_got = (bfd_vma) -1;
4990 }
4991
4992 /* Allocate space for global sym dynamic relocs. */
4993 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4994
4995 if (htab->tlsld_got.refcount > 0)
4996 {
4997 htab->tlsld_got.offset = allocate_got (htab, 8);
4998 if (info->shared)
4999 htab->relgot->size += sizeof (Elf32_External_Rela);
5000 }
5001 else
5002 htab->tlsld_got.offset = (bfd_vma) -1;
5003
5004 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5005 {
5006 unsigned int g_o_t = 32768;
5007
5008 /* If we haven't allocated the header, do so now. When we get here,
5009 for old plt/got the got size will be 0 to 32764 (not allocated),
5010 or 32780 to 65536 (header allocated). For new plt/got, the
5011 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5012 if (htab->got->size <= 32768)
5013 {
5014 g_o_t = htab->got->size;
5015 if (htab->plt_type == PLT_OLD)
5016 g_o_t += 4;
5017 htab->got->size += htab->got_header_size;
5018 }
5019
5020 htab->elf.hgot->root.u.def.value = g_o_t;
5021 }
5022
5023 if (htab->glink != NULL && htab->glink->size != 0)
5024 {
5025 htab->glink_pltresolve = htab->glink->size;
5026 /* Space for the branch table. */
5027 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5028 /* Pad out to align the start of PLTresolve. */
5029 htab->glink->size += -htab->glink->size & 15;
5030 htab->glink->size += GLINK_PLTRESOLVE;
5031
5032 if (htab->emit_stub_syms)
5033 {
5034 struct elf_link_hash_entry *sh;
5035 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5036 TRUE, FALSE, FALSE);
5037 if (sh == NULL)
5038 return FALSE;
5039 if (sh->root.type == bfd_link_hash_new)
5040 {
5041 sh->root.type = bfd_link_hash_defined;
5042 sh->root.u.def.section = htab->glink;
5043 sh->root.u.def.value = htab->glink_pltresolve;
5044 sh->ref_regular = 1;
5045 sh->def_regular = 1;
5046 sh->ref_regular_nonweak = 1;
5047 sh->forced_local = 1;
5048 sh->non_elf = 0;
5049 }
5050 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5051 TRUE, FALSE, FALSE);
5052 if (sh == NULL)
5053 return FALSE;
5054 if (sh->root.type == bfd_link_hash_new)
5055 {
5056 sh->root.type = bfd_link_hash_defined;
5057 sh->root.u.def.section = htab->glink;
5058 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5059 sh->ref_regular = 1;
5060 sh->def_regular = 1;
5061 sh->ref_regular_nonweak = 1;
5062 sh->forced_local = 1;
5063 sh->non_elf = 0;
5064 }
5065 }
5066 }
5067
5068 /* We've now determined the sizes of the various dynamic sections.
5069 Allocate memory for them. */
5070 relocs = FALSE;
5071 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5072 {
5073 bfd_boolean strip_section = TRUE;
5074
5075 if ((s->flags & SEC_LINKER_CREATED) == 0)
5076 continue;
5077
5078 if (s == htab->plt
5079 || s == htab->glink
5080 || s == htab->got
5081 || s == htab->sgotplt
5082 || s == htab->sbss
5083 || s == htab->dynbss
5084 || s == htab->dynsbss)
5085 {
5086 /* We'd like to strip these sections if they aren't needed, but if
5087 we've exported dynamic symbols from them we must leave them.
5088 It's too late to tell BFD to get rid of the symbols. */
5089 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5090 strip_section = FALSE;
5091 /* Strip this section if we don't need it; see the
5092 comment below. */
5093 }
5094 else if (s == htab->sdata[0].section
5095 || s == htab->sdata[1].section)
5096 {
5097 /* Strip these too. */
5098 }
5099 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5100 {
5101 if (s->size != 0)
5102 {
5103 /* Remember whether there are any relocation sections. */
5104 relocs = TRUE;
5105
5106 /* We use the reloc_count field as a counter if we need
5107 to copy relocs into the output file. */
5108 s->reloc_count = 0;
5109 }
5110 }
5111 else
5112 {
5113 /* It's not one of our sections, so don't allocate space. */
5114 continue;
5115 }
5116
5117 if (s->size == 0 && strip_section)
5118 {
5119 /* If we don't need this section, strip it from the
5120 output file. This is mostly to handle .rela.bss and
5121 .rela.plt. We must create both sections in
5122 create_dynamic_sections, because they must be created
5123 before the linker maps input sections to output
5124 sections. The linker does that before
5125 adjust_dynamic_symbol is called, and it is that
5126 function which decides whether anything needs to go
5127 into these sections. */
5128 s->flags |= SEC_EXCLUDE;
5129 continue;
5130 }
5131
5132 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5133 continue;
5134
5135 /* Allocate memory for the section contents. */
5136 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5137 if (s->contents == NULL)
5138 return FALSE;
5139 }
5140
5141 if (htab->elf.dynamic_sections_created)
5142 {
5143 /* Add some entries to the .dynamic section. We fill in the
5144 values later, in ppc_elf_finish_dynamic_sections, but we
5145 must add the entries now so that we get the correct size for
5146 the .dynamic section. The DT_DEBUG entry is filled in by the
5147 dynamic linker and used by the debugger. */
5148 #define add_dynamic_entry(TAG, VAL) \
5149 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5150
5151 if (info->executable)
5152 {
5153 if (!add_dynamic_entry (DT_DEBUG, 0))
5154 return FALSE;
5155 }
5156
5157 if (htab->plt != NULL && htab->plt->size != 0)
5158 {
5159 if (!add_dynamic_entry (DT_PLTGOT, 0)
5160 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5161 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5162 || !add_dynamic_entry (DT_JMPREL, 0))
5163 return FALSE;
5164 }
5165
5166 if (htab->glink != NULL && htab->glink->size != 0)
5167 {
5168 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5169 return FALSE;
5170 }
5171
5172 if (relocs)
5173 {
5174 if (!add_dynamic_entry (DT_RELA, 0)
5175 || !add_dynamic_entry (DT_RELASZ, 0)
5176 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5177 return FALSE;
5178 }
5179
5180 /* If any dynamic relocs apply to a read-only section, then we
5181 need a DT_TEXTREL entry. */
5182 if ((info->flags & DF_TEXTREL) == 0)
5183 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
5184 info);
5185
5186 if ((info->flags & DF_TEXTREL) != 0)
5187 {
5188 if (!add_dynamic_entry (DT_TEXTREL, 0))
5189 return FALSE;
5190 }
5191 }
5192 #undef add_dynamic_entry
5193
5194 return TRUE;
5195 }
5196 \f
5197 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5198
5199 static const int shared_stub_entry[] =
5200 {
5201 0x7c0802a6, /* mflr 0 */
5202 0x429f0005, /* bcl 20, 31, .Lxxx */
5203 0x7d6802a6, /* mflr 11 */
5204 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5205 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5206 0x7c0803a6, /* mtlr 0 */
5207 0x7d6903a6, /* mtctr 11 */
5208 0x4e800420, /* bctr */
5209 };
5210
5211 static const int stub_entry[] =
5212 {
5213 0x3d600000, /* lis 11,xxx@ha */
5214 0x396b0000, /* addi 11,11,xxx@l */
5215 0x7d6903a6, /* mtctr 11 */
5216 0x4e800420, /* bctr */
5217 };
5218
5219 static bfd_boolean
5220 ppc_elf_relax_section (bfd *abfd,
5221 asection *isec,
5222 struct bfd_link_info *link_info,
5223 bfd_boolean *again)
5224 {
5225 struct one_fixup
5226 {
5227 struct one_fixup *next;
5228 asection *tsec;
5229 bfd_vma toff;
5230 bfd_vma trampoff;
5231 };
5232
5233 Elf_Internal_Shdr *symtab_hdr;
5234 bfd_byte *contents = NULL;
5235 Elf_Internal_Sym *isymbuf = NULL;
5236 Elf_Internal_Rela *internal_relocs = NULL;
5237 Elf_Internal_Rela *irel, *irelend;
5238 struct one_fixup *fixups = NULL;
5239 bfd_boolean changed;
5240 struct ppc_elf_link_hash_table *htab;
5241 bfd_size_type trampoff;
5242 asection *got2;
5243
5244 *again = FALSE;
5245
5246 /* Nothing to do if there are no relocations, and no need to do
5247 anything with non-alloc sections. */
5248 if ((isec->flags & SEC_ALLOC) == 0
5249 || (isec->flags & SEC_RELOC) == 0
5250 || isec->reloc_count == 0)
5251 return TRUE;
5252
5253 trampoff = (isec->size + 3) & (bfd_vma) -4;
5254 /* Space for a branch around any trampolines. */
5255 trampoff += 4;
5256
5257 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5258
5259 /* Get a copy of the native relocations. */
5260 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5261 link_info->keep_memory);
5262 if (internal_relocs == NULL)
5263 goto error_return;
5264
5265 htab = ppc_elf_hash_table (link_info);
5266 got2 = bfd_get_section_by_name (abfd, ".got2");
5267
5268 irelend = internal_relocs + isec->reloc_count;
5269 for (irel = internal_relocs; irel < irelend; irel++)
5270 {
5271 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5272 bfd_vma symaddr, reladdr, toff, roff;
5273 asection *tsec;
5274 struct one_fixup *f;
5275 size_t insn_offset = 0;
5276 bfd_vma max_branch_offset, val;
5277 bfd_byte *hit_addr;
5278 unsigned long t0;
5279 unsigned char sym_type;
5280
5281 switch (r_type)
5282 {
5283 case R_PPC_REL24:
5284 case R_PPC_LOCAL24PC:
5285 case R_PPC_PLTREL24:
5286 max_branch_offset = 1 << 25;
5287 break;
5288
5289 case R_PPC_REL14:
5290 case R_PPC_REL14_BRTAKEN:
5291 case R_PPC_REL14_BRNTAKEN:
5292 max_branch_offset = 1 << 15;
5293 break;
5294
5295 default:
5296 continue;
5297 }
5298
5299 /* Get the value of the symbol referred to by the reloc. */
5300 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5301 {
5302 /* A local symbol. */
5303 Elf_Internal_Sym *isym;
5304
5305 /* Read this BFD's local symbols. */
5306 if (isymbuf == NULL)
5307 {
5308 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5309 if (isymbuf == NULL)
5310 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5311 symtab_hdr->sh_info, 0,
5312 NULL, NULL, NULL);
5313 if (isymbuf == 0)
5314 goto error_return;
5315 }
5316 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5317 if (isym->st_shndx == SHN_UNDEF)
5318 continue; /* We can't do anything with undefined symbols. */
5319 else if (isym->st_shndx == SHN_ABS)
5320 tsec = bfd_abs_section_ptr;
5321 else if (isym->st_shndx == SHN_COMMON)
5322 tsec = bfd_com_section_ptr;
5323 else
5324 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5325
5326 toff = isym->st_value;
5327 sym_type = ELF_ST_TYPE (isym->st_info);
5328 }
5329 else
5330 {
5331 /* Global symbol handling. */
5332 unsigned long indx;
5333 struct elf_link_hash_entry *h;
5334
5335 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5336 h = elf_sym_hashes (abfd)[indx];
5337
5338 while (h->root.type == bfd_link_hash_indirect
5339 || h->root.type == bfd_link_hash_warning)
5340 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5341
5342 tsec = NULL;
5343 toff = 0;
5344 if (r_type == R_PPC_PLTREL24
5345 && htab->plt != NULL)
5346 {
5347 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5348
5349 if (ent != NULL)
5350 {
5351 if (htab->plt_type == PLT_NEW)
5352 {
5353 tsec = htab->glink;
5354 toff = ent->glink_offset;
5355 }
5356 else
5357 {
5358 tsec = htab->plt;
5359 toff = ent->plt.offset;
5360 }
5361 }
5362 }
5363 if (tsec != NULL)
5364 ;
5365 else if (h->root.type == bfd_link_hash_defined
5366 || h->root.type == bfd_link_hash_defweak)
5367 {
5368 tsec = h->root.u.def.section;
5369 toff = h->root.u.def.value;
5370 }
5371 else
5372 continue;
5373
5374 sym_type = h->type;
5375 }
5376
5377 /* If the branch and target are in the same section, you have
5378 no hope of adding stubs. We'll error out later should the
5379 branch overflow. */
5380 if (tsec == isec)
5381 continue;
5382
5383 /* There probably isn't any reason to handle symbols in
5384 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5385 attribute for a code section, and we are only looking at
5386 branches. However, implement it correctly here as a
5387 reference for other target relax_section functions. */
5388 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5389 {
5390 /* At this stage in linking, no SEC_MERGE symbol has been
5391 adjusted, so all references to such symbols need to be
5392 passed through _bfd_merged_section_offset. (Later, in
5393 relocate_section, all SEC_MERGE symbols *except* for
5394 section symbols have been adjusted.)
5395
5396 gas may reduce relocations against symbols in SEC_MERGE
5397 sections to a relocation against the section symbol when
5398 the original addend was zero. When the reloc is against
5399 a section symbol we should include the addend in the
5400 offset passed to _bfd_merged_section_offset, since the
5401 location of interest is the original symbol. On the
5402 other hand, an access to "sym+addend" where "sym" is not
5403 a section symbol should not include the addend; Such an
5404 access is presumed to be an offset from "sym"; The
5405 location of interest is just "sym". */
5406 if (sym_type == STT_SECTION)
5407 toff += irel->r_addend;
5408
5409 toff = _bfd_merged_section_offset (abfd, &tsec,
5410 elf_section_data (tsec)->sec_info,
5411 toff);
5412
5413 if (sym_type != STT_SECTION)
5414 toff += irel->r_addend;
5415 }
5416 /* PLTREL24 addends are special. */
5417 else if (r_type != R_PPC_PLTREL24)
5418 toff += irel->r_addend;
5419
5420 /* Attempted -shared link of non-pic code loses. */
5421 if (tsec->output_section == NULL)
5422 continue;
5423
5424 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5425
5426 roff = irel->r_offset;
5427 reladdr = isec->output_section->vma + isec->output_offset + roff;
5428
5429 /* If the branch is in range, no need to do anything. */
5430 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5431 continue;
5432
5433 /* Look for an existing fixup to this address. */
5434 for (f = fixups; f ; f = f->next)
5435 if (f->tsec == tsec && f->toff == toff)
5436 break;
5437
5438 if (f == NULL)
5439 {
5440 size_t size;
5441 unsigned long stub_rtype;
5442
5443 val = trampoff - roff;
5444 if (val >= max_branch_offset)
5445 /* Oh dear, we can't reach a trampoline. Don't try to add
5446 one. We'll report an error later. */
5447 continue;
5448
5449 if (link_info->shared)
5450 {
5451 size = 4 * ARRAY_SIZE (shared_stub_entry);
5452 insn_offset = 12;
5453 stub_rtype = R_PPC_RELAX32PC;
5454 }
5455 else
5456 {
5457 size = 4 * ARRAY_SIZE (stub_entry);
5458 insn_offset = 0;
5459 stub_rtype = R_PPC_RELAX32;
5460 }
5461
5462 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5463 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5464 abort ();
5465 if (tsec == htab->plt
5466 || tsec == htab->glink)
5467 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5468
5469 /* Hijack the old relocation. Since we need two
5470 relocations for this use a "composite" reloc. */
5471 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5472 stub_rtype);
5473 irel->r_offset = trampoff + insn_offset;
5474
5475 /* Record the fixup so we don't do it again this section. */
5476 f = bfd_malloc (sizeof (*f));
5477 f->next = fixups;
5478 f->tsec = tsec;
5479 f->toff = toff;
5480 f->trampoff = trampoff;
5481 fixups = f;
5482
5483 trampoff += size;
5484 }
5485 else
5486 {
5487 val = f->trampoff - roff;
5488 if (val >= max_branch_offset)
5489 continue;
5490
5491 /* Nop out the reloc, since we're finalizing things here. */
5492 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5493 }
5494
5495 /* Get the section contents. */
5496 if (contents == NULL)
5497 {
5498 /* Get cached copy if it exists. */
5499 if (elf_section_data (isec)->this_hdr.contents != NULL)
5500 contents = elf_section_data (isec)->this_hdr.contents;
5501 else
5502 {
5503 /* Go get them off disk. */
5504 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5505 goto error_return;
5506 }
5507 }
5508
5509 /* Fix up the existing branch to hit the trampoline. */
5510 hit_addr = contents + roff;
5511 switch (r_type)
5512 {
5513 case R_PPC_REL24:
5514 case R_PPC_LOCAL24PC:
5515 case R_PPC_PLTREL24:
5516 t0 = bfd_get_32 (abfd, hit_addr);
5517 t0 &= ~0x3fffffc;
5518 t0 |= val & 0x3fffffc;
5519 bfd_put_32 (abfd, t0, hit_addr);
5520 break;
5521
5522 case R_PPC_REL14:
5523 case R_PPC_REL14_BRTAKEN:
5524 case R_PPC_REL14_BRNTAKEN:
5525 t0 = bfd_get_32 (abfd, hit_addr);
5526 t0 &= ~0xfffc;
5527 t0 |= val & 0xfffc;
5528 bfd_put_32 (abfd, t0, hit_addr);
5529 break;
5530 }
5531 }
5532
5533 /* Write out the trampolines. */
5534 changed = fixups != NULL;
5535 if (fixups != NULL)
5536 {
5537 const int *stub;
5538 bfd_byte *dest;
5539 bfd_vma val;
5540 int i, size;
5541
5542 do
5543 {
5544 struct one_fixup *f = fixups;
5545 fixups = fixups->next;
5546 free (f);
5547 }
5548 while (fixups);
5549
5550 contents = bfd_realloc (contents, trampoff);
5551 if (contents == NULL)
5552 goto error_return;
5553
5554 isec->size = (isec->size + 3) & (bfd_vma) -4;
5555 /* Branch around the trampolines. */
5556 val = trampoff - isec->size + 0x48000000;
5557 dest = contents + isec->size;
5558 isec->size = trampoff;
5559 bfd_put_32 (abfd, val, dest);
5560 dest += 4;
5561
5562 if (link_info->shared)
5563 {
5564 stub = shared_stub_entry;
5565 size = ARRAY_SIZE (shared_stub_entry);
5566 }
5567 else
5568 {
5569 stub = stub_entry;
5570 size = ARRAY_SIZE (stub_entry);
5571 }
5572
5573 i = 0;
5574 while (dest < contents + trampoff)
5575 {
5576 bfd_put_32 (abfd, stub[i], dest);
5577 i++;
5578 if (i == size)
5579 i = 0;
5580 dest += 4;
5581 }
5582 BFD_ASSERT (i == 0);
5583 }
5584
5585 if (isymbuf != NULL
5586 && symtab_hdr->contents != (unsigned char *) isymbuf)
5587 {
5588 if (! link_info->keep_memory)
5589 free (isymbuf);
5590 else
5591 {
5592 /* Cache the symbols for elf_link_input_bfd. */
5593 symtab_hdr->contents = (unsigned char *) isymbuf;
5594 }
5595 }
5596
5597 if (contents != NULL
5598 && elf_section_data (isec)->this_hdr.contents != contents)
5599 {
5600 if (!changed && !link_info->keep_memory)
5601 free (contents);
5602 else
5603 {
5604 /* Cache the section contents for elf_link_input_bfd. */
5605 elf_section_data (isec)->this_hdr.contents = contents;
5606 }
5607 }
5608
5609 if (elf_section_data (isec)->relocs != internal_relocs)
5610 {
5611 if (!changed)
5612 free (internal_relocs);
5613 else
5614 elf_section_data (isec)->relocs = internal_relocs;
5615 }
5616
5617 *again = changed;
5618 return TRUE;
5619
5620 error_return:
5621 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5622 free (isymbuf);
5623 if (contents != NULL
5624 && elf_section_data (isec)->this_hdr.contents != contents)
5625 free (contents);
5626 if (internal_relocs != NULL
5627 && elf_section_data (isec)->relocs != internal_relocs)
5628 free (internal_relocs);
5629 return FALSE;
5630 }
5631 \f
5632 /* What to do when ld finds relocations against symbols defined in
5633 discarded sections. */
5634
5635 static unsigned int
5636 ppc_elf_action_discarded (asection *sec)
5637 {
5638 if (strcmp (".fixup", sec->name) == 0)
5639 return 0;
5640
5641 if (strcmp (".got2", sec->name) == 0)
5642 return 0;
5643
5644 return _bfd_elf_default_action_discarded (sec);
5645 }
5646 \f
5647 /* Fill in the address for a pointer generated in a linker section. */
5648
5649 static bfd_vma
5650 elf_finish_pointer_linker_section (bfd *input_bfd,
5651 elf_linker_section_t *lsect,
5652 struct elf_link_hash_entry *h,
5653 bfd_vma relocation,
5654 const Elf_Internal_Rela *rel)
5655 {
5656 elf_linker_section_pointers_t *linker_section_ptr;
5657
5658 BFD_ASSERT (lsect != NULL);
5659
5660 if (h != NULL)
5661 {
5662 /* Handle global symbol. */
5663 struct ppc_elf_link_hash_entry *eh;
5664
5665 eh = (struct ppc_elf_link_hash_entry *) h;
5666 BFD_ASSERT (eh->elf.def_regular);
5667 linker_section_ptr = eh->linker_section_pointer;
5668 }
5669 else
5670 {
5671 /* Handle local symbol. */
5672 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5673
5674 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5675 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5676 }
5677
5678 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5679 rel->r_addend,
5680 lsect);
5681 BFD_ASSERT (linker_section_ptr != NULL);
5682
5683 /* Offset will always be a multiple of four, so use the bottom bit
5684 as a "written" flag. */
5685 if ((linker_section_ptr->offset & 1) == 0)
5686 {
5687 bfd_put_32 (lsect->section->owner,
5688 relocation + linker_section_ptr->addend,
5689 lsect->section->contents + linker_section_ptr->offset);
5690 linker_section_ptr->offset += 1;
5691 }
5692
5693 relocation = (lsect->section->output_offset
5694 + linker_section_ptr->offset - 1
5695 - 0x8000);
5696
5697 #ifdef DEBUG
5698 fprintf (stderr,
5699 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5700 lsect->name, (long) relocation, (long) relocation);
5701 #endif
5702
5703 /* Subtract out the addend, because it will get added back in by the normal
5704 processing. */
5705 return relocation - linker_section_ptr->addend;
5706 }
5707
5708 /* The RELOCATE_SECTION function is called by the ELF backend linker
5709 to handle the relocations for a section.
5710
5711 The relocs are always passed as Rela structures; if the section
5712 actually uses Rel structures, the r_addend field will always be
5713 zero.
5714
5715 This function is responsible for adjust the section contents as
5716 necessary, and (if using Rela relocs and generating a
5717 relocatable output file) adjusting the reloc addend as
5718 necessary.
5719
5720 This function does not have to worry about setting the reloc
5721 address or the reloc symbol index.
5722
5723 LOCAL_SYMS is a pointer to the swapped in local symbols.
5724
5725 LOCAL_SECTIONS is an array giving the section in the input file
5726 corresponding to the st_shndx field of each local symbol.
5727
5728 The global hash table entry for the global symbols can be found
5729 via elf_sym_hashes (input_bfd).
5730
5731 When generating relocatable output, this function must handle
5732 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5733 going to be the section symbol corresponding to the output
5734 section, which means that the addend must be adjusted
5735 accordingly. */
5736
5737 static bfd_boolean
5738 ppc_elf_relocate_section (bfd *output_bfd,
5739 struct bfd_link_info *info,
5740 bfd *input_bfd,
5741 asection *input_section,
5742 bfd_byte *contents,
5743 Elf_Internal_Rela *relocs,
5744 Elf_Internal_Sym *local_syms,
5745 asection **local_sections)
5746 {
5747 Elf_Internal_Shdr *symtab_hdr;
5748 struct elf_link_hash_entry **sym_hashes;
5749 struct ppc_elf_link_hash_table *htab;
5750 Elf_Internal_Rela *rel;
5751 Elf_Internal_Rela *relend;
5752 Elf_Internal_Rela outrel;
5753 bfd_byte *loc;
5754 asection *got2, *sreloc = NULL;
5755 bfd_vma *local_got_offsets;
5756 bfd_boolean ret = TRUE;
5757 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5758
5759 #ifdef DEBUG
5760 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5761 "%ld relocations%s",
5762 input_bfd, input_section,
5763 (long) input_section->reloc_count,
5764 (info->relocatable) ? " (relocatable)" : "");
5765 #endif
5766
5767 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5768
5769 /* Initialize howto table if not already done. */
5770 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5771 ppc_elf_howto_init ();
5772
5773 htab = ppc_elf_hash_table (info);
5774 local_got_offsets = elf_local_got_offsets (input_bfd);
5775 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5776 sym_hashes = elf_sym_hashes (input_bfd);
5777 rel = relocs;
5778 relend = relocs + input_section->reloc_count;
5779 for (; rel < relend; rel++)
5780 {
5781 enum elf_ppc_reloc_type r_type;
5782 bfd_vma addend;
5783 bfd_reloc_status_type r;
5784 Elf_Internal_Sym *sym;
5785 asection *sec;
5786 struct elf_link_hash_entry *h;
5787 const char *sym_name;
5788 reloc_howto_type *howto;
5789 unsigned long r_symndx;
5790 bfd_vma relocation;
5791 bfd_vma branch_bit, insn, from;
5792 bfd_boolean unresolved_reloc;
5793 bfd_boolean warned;
5794 unsigned int tls_type, tls_mask, tls_gd;
5795
5796 r_type = ELF32_R_TYPE (rel->r_info);
5797 sym = NULL;
5798 sec = NULL;
5799 h = NULL;
5800 unresolved_reloc = FALSE;
5801 warned = FALSE;
5802 r_symndx = ELF32_R_SYM (rel->r_info);
5803
5804 if (r_symndx < symtab_hdr->sh_info)
5805 {
5806 sym = local_syms + r_symndx;
5807 sec = local_sections[r_symndx];
5808 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5809
5810 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5811 }
5812 else
5813 {
5814 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5815 r_symndx, symtab_hdr, sym_hashes,
5816 h, sec, relocation,
5817 unresolved_reloc, warned);
5818
5819 sym_name = h->root.root.string;
5820 }
5821
5822 if (sec != NULL && elf_discarded_section (sec))
5823 {
5824 /* For relocs against symbols from removed linkonce sections,
5825 or sections discarded by a linker script, we just want the
5826 section contents zeroed. Avoid any special processing. */
5827 howto = NULL;
5828 if (r_type < R_PPC_max)
5829 howto = ppc_elf_howto_table[r_type];
5830 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5831 rel->r_info = 0;
5832 rel->r_addend = 0;
5833 continue;
5834 }
5835
5836 if (info->relocatable)
5837 {
5838 if (got2 != NULL
5839 && r_type == R_PPC_PLTREL24
5840 && rel->r_addend >= 32768)
5841 {
5842 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5843 addend specifies the GOT pointer offset within .got2. */
5844 rel->r_addend += got2->output_offset;
5845 }
5846 continue;
5847 }
5848
5849 /* TLS optimizations. Replace instruction sequences and relocs
5850 based on information we collected in tls_optimize. We edit
5851 RELOCS so that --emit-relocs will output something sensible
5852 for the final instruction stream. */
5853 tls_mask = 0;
5854 tls_gd = 0;
5855 if (IS_PPC_TLS_RELOC (r_type))
5856 {
5857 if (h != NULL)
5858 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5859 else if (local_got_offsets != NULL)
5860 {
5861 char *lgot_masks;
5862 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5863 tls_mask = lgot_masks[r_symndx];
5864 }
5865 }
5866
5867 /* Ensure reloc mapping code below stays sane. */
5868 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5869 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5870 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5871 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5872 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5873 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5874 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5875 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5876 abort ();
5877 switch (r_type)
5878 {
5879 default:
5880 break;
5881
5882 case R_PPC_GOT_TPREL16:
5883 case R_PPC_GOT_TPREL16_LO:
5884 if (tls_mask != 0
5885 && (tls_mask & TLS_TPREL) == 0)
5886 {
5887 bfd_vma insn;
5888 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5889 insn &= 31 << 21;
5890 insn |= 0x3c020000; /* addis 0,2,0 */
5891 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5892 r_type = R_PPC_TPREL16_HA;
5893 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5894 }
5895 break;
5896
5897 case R_PPC_TLS:
5898 if (tls_mask != 0
5899 && (tls_mask & TLS_TPREL) == 0)
5900 {
5901 bfd_vma insn, rtra;
5902 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5903 if ((insn & ((31 << 26) | (31 << 11)))
5904 == ((31 << 26) | (2 << 11)))
5905 rtra = insn & ((1 << 26) - (1 << 16));
5906 else if ((insn & ((31 << 26) | (31 << 16)))
5907 == ((31 << 26) | (2 << 16)))
5908 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5909 else
5910 abort ();
5911 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5912 /* add -> addi. */
5913 insn = 14 << 26;
5914 else if ((insn & (31 << 1)) == 23 << 1
5915 && ((insn & (31 << 6)) < 14 << 6
5916 || ((insn & (31 << 6)) >= 16 << 6
5917 && (insn & (31 << 6)) < 24 << 6)))
5918 /* load and store indexed -> dform. */
5919 insn = (32 | ((insn >> 6) & 31)) << 26;
5920 else if ((insn & (31 << 1)) == 21 << 1
5921 && (insn & (0x1a << 6)) == 0)
5922 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5923 insn = (((58 | ((insn >> 6) & 4)) << 26)
5924 | ((insn >> 6) & 1));
5925 else if ((insn & (31 << 1)) == 21 << 1
5926 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5927 /* lwax -> lwa. */
5928 insn = (58 << 26) | 2;
5929 else
5930 abort ();
5931 insn |= rtra;
5932 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5933 r_type = R_PPC_TPREL16_LO;
5934 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5935
5936 /* Was PPC_TLS which sits on insn boundary, now
5937 PPC_TPREL16_LO which is at low-order half-word. */
5938 rel->r_offset += d_offset;
5939 }
5940 break;
5941
5942 case R_PPC_GOT_TLSGD16_HI:
5943 case R_PPC_GOT_TLSGD16_HA:
5944 tls_gd = TLS_TPRELGD;
5945 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5946 goto tls_gdld_hi;
5947 break;
5948
5949 case R_PPC_GOT_TLSLD16_HI:
5950 case R_PPC_GOT_TLSLD16_HA:
5951 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5952 {
5953 tls_gdld_hi:
5954 if ((tls_mask & tls_gd) != 0)
5955 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5956 + R_PPC_GOT_TPREL16);
5957 else
5958 {
5959 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5960 rel->r_offset -= d_offset;
5961 r_type = R_PPC_NONE;
5962 }
5963 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5964 }
5965 break;
5966
5967 case R_PPC_GOT_TLSGD16:
5968 case R_PPC_GOT_TLSGD16_LO:
5969 tls_gd = TLS_TPRELGD;
5970 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5971 goto tls_ldgd_opt;
5972 break;
5973
5974 case R_PPC_GOT_TLSLD16:
5975 case R_PPC_GOT_TLSLD16_LO:
5976 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5977 {
5978 bfd_vma insn1, insn2;
5979 bfd_vma offset;
5980
5981 tls_ldgd_opt:
5982 offset = rel[1].r_offset;
5983 insn1 = bfd_get_32 (output_bfd,
5984 contents + rel->r_offset - d_offset);
5985 if ((tls_mask & tls_gd) != 0)
5986 {
5987 /* IE */
5988 insn1 &= (1 << 26) - 1;
5989 insn1 |= 32 << 26; /* lwz */
5990 insn2 = 0x7c631214; /* add 3,3,2 */
5991 rel[1].r_info
5992 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
5993 rel[1].r_addend = 0;
5994 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5995 + R_PPC_GOT_TPREL16);
5996 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5997 }
5998 else
5999 {
6000 /* LE */
6001 insn1 = 0x3c620000; /* addis 3,2,0 */
6002 insn2 = 0x38630000; /* addi 3,3,0 */
6003 if (tls_gd == 0)
6004 {
6005 /* Was an LD reloc. */
6006 r_symndx = 0;
6007 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6008 }
6009 r_type = R_PPC_TPREL16_HA;
6010 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6011 rel[1].r_info = ELF32_R_INFO (r_symndx,
6012 R_PPC_TPREL16_LO);
6013 rel[1].r_offset += d_offset;
6014 rel[1].r_addend = rel->r_addend;
6015 }
6016 bfd_put_32 (output_bfd, insn1,
6017 contents + rel->r_offset - d_offset);
6018 bfd_put_32 (output_bfd, insn2, contents + offset);
6019 if (tls_gd == 0)
6020 {
6021 /* We changed the symbol on an LD reloc. Start over
6022 in order to get h, sym, sec etc. right. */
6023 rel--;
6024 continue;
6025 }
6026 }
6027 break;
6028 }
6029
6030 /* Handle other relocations that tweak non-addend part of insn. */
6031 branch_bit = 0;
6032 switch (r_type)
6033 {
6034 default:
6035 break;
6036
6037 /* Branch taken prediction relocations. */
6038 case R_PPC_ADDR14_BRTAKEN:
6039 case R_PPC_REL14_BRTAKEN:
6040 branch_bit = BRANCH_PREDICT_BIT;
6041 /* Fall thru */
6042
6043 /* Branch not taken prediction relocations. */
6044 case R_PPC_ADDR14_BRNTAKEN:
6045 case R_PPC_REL14_BRNTAKEN:
6046 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6047 insn &= ~BRANCH_PREDICT_BIT;
6048 insn |= branch_bit;
6049
6050 from = (rel->r_offset
6051 + input_section->output_offset
6052 + input_section->output_section->vma);
6053
6054 /* Invert 'y' bit if not the default. */
6055 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6056 insn ^= BRANCH_PREDICT_BIT;
6057
6058 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6059 break;
6060 }
6061
6062 addend = rel->r_addend;
6063 tls_type = 0;
6064 howto = NULL;
6065 if (r_type < R_PPC_max)
6066 howto = ppc_elf_howto_table[r_type];
6067 switch (r_type)
6068 {
6069 default:
6070 (*_bfd_error_handler)
6071 (_("%B: unknown relocation type %d for symbol %s"),
6072 input_bfd, (int) r_type, sym_name);
6073
6074 bfd_set_error (bfd_error_bad_value);
6075 ret = FALSE;
6076 continue;
6077
6078 case R_PPC_NONE:
6079 case R_PPC_TLS:
6080 case R_PPC_EMB_MRKREF:
6081 case R_PPC_GNU_VTINHERIT:
6082 case R_PPC_GNU_VTENTRY:
6083 continue;
6084
6085 /* GOT16 relocations. Like an ADDR16 using the symbol's
6086 address in the GOT as relocation value instead of the
6087 symbol's value itself. Also, create a GOT entry for the
6088 symbol and put the symbol value there. */
6089 case R_PPC_GOT_TLSGD16:
6090 case R_PPC_GOT_TLSGD16_LO:
6091 case R_PPC_GOT_TLSGD16_HI:
6092 case R_PPC_GOT_TLSGD16_HA:
6093 tls_type = TLS_TLS | TLS_GD;
6094 goto dogot;
6095
6096 case R_PPC_GOT_TLSLD16:
6097 case R_PPC_GOT_TLSLD16_LO:
6098 case R_PPC_GOT_TLSLD16_HI:
6099 case R_PPC_GOT_TLSLD16_HA:
6100 tls_type = TLS_TLS | TLS_LD;
6101 goto dogot;
6102
6103 case R_PPC_GOT_TPREL16:
6104 case R_PPC_GOT_TPREL16_LO:
6105 case R_PPC_GOT_TPREL16_HI:
6106 case R_PPC_GOT_TPREL16_HA:
6107 tls_type = TLS_TLS | TLS_TPREL;
6108 goto dogot;
6109
6110 case R_PPC_GOT_DTPREL16:
6111 case R_PPC_GOT_DTPREL16_LO:
6112 case R_PPC_GOT_DTPREL16_HI:
6113 case R_PPC_GOT_DTPREL16_HA:
6114 tls_type = TLS_TLS | TLS_DTPREL;
6115 goto dogot;
6116
6117 case R_PPC_GOT16:
6118 case R_PPC_GOT16_LO:
6119 case R_PPC_GOT16_HI:
6120 case R_PPC_GOT16_HA:
6121 dogot:
6122 {
6123 /* Relocation is to the entry for this symbol in the global
6124 offset table. */
6125 bfd_vma off;
6126 bfd_vma *offp;
6127 unsigned long indx;
6128
6129 if (htab->got == NULL)
6130 abort ();
6131
6132 indx = 0;
6133 if (tls_type == (TLS_TLS | TLS_LD)
6134 && (h == NULL
6135 || !h->def_dynamic))
6136 offp = &htab->tlsld_got.offset;
6137 else if (h != NULL)
6138 {
6139 bfd_boolean dyn;
6140 dyn = htab->elf.dynamic_sections_created;
6141 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6142 || (info->shared
6143 && SYMBOL_REFERENCES_LOCAL (info, h)))
6144 /* This is actually a static link, or it is a
6145 -Bsymbolic link and the symbol is defined
6146 locally, or the symbol was forced to be local
6147 because of a version file. */
6148 ;
6149 else
6150 {
6151 indx = h->dynindx;
6152 unresolved_reloc = FALSE;
6153 }
6154 offp = &h->got.offset;
6155 }
6156 else
6157 {
6158 if (local_got_offsets == NULL)
6159 abort ();
6160 offp = &local_got_offsets[r_symndx];
6161 }
6162
6163 /* The offset must always be a multiple of 4. We use the
6164 least significant bit to record whether we have already
6165 processed this entry. */
6166 off = *offp;
6167 if ((off & 1) != 0)
6168 off &= ~1;
6169 else
6170 {
6171 unsigned int tls_m = (tls_mask
6172 & (TLS_LD | TLS_GD | TLS_DTPREL
6173 | TLS_TPREL | TLS_TPRELGD));
6174
6175 if (offp == &htab->tlsld_got.offset)
6176 tls_m = TLS_LD;
6177 else if (h == NULL
6178 || !h->def_dynamic)
6179 tls_m &= ~TLS_LD;
6180
6181 /* We might have multiple got entries for this sym.
6182 Initialize them all. */
6183 do
6184 {
6185 int tls_ty = 0;
6186
6187 if ((tls_m & TLS_LD) != 0)
6188 {
6189 tls_ty = TLS_TLS | TLS_LD;
6190 tls_m &= ~TLS_LD;
6191 }
6192 else if ((tls_m & TLS_GD) != 0)
6193 {
6194 tls_ty = TLS_TLS | TLS_GD;
6195 tls_m &= ~TLS_GD;
6196 }
6197 else if ((tls_m & TLS_DTPREL) != 0)
6198 {
6199 tls_ty = TLS_TLS | TLS_DTPREL;
6200 tls_m &= ~TLS_DTPREL;
6201 }
6202 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6203 {
6204 tls_ty = TLS_TLS | TLS_TPREL;
6205 tls_m = 0;
6206 }
6207
6208 /* Generate relocs for the dynamic linker. */
6209 if ((info->shared || indx != 0)
6210 && (h == NULL
6211 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6212 || h->root.type != bfd_link_hash_undefweak))
6213 {
6214 outrel.r_offset = (htab->got->output_section->vma
6215 + htab->got->output_offset
6216 + off);
6217 outrel.r_addend = 0;
6218 if (tls_ty & (TLS_LD | TLS_GD))
6219 {
6220 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6221 if (tls_ty == (TLS_TLS | TLS_GD))
6222 {
6223 loc = htab->relgot->contents;
6224 loc += (htab->relgot->reloc_count++
6225 * sizeof (Elf32_External_Rela));
6226 bfd_elf32_swap_reloca_out (output_bfd,
6227 &outrel, loc);
6228 outrel.r_offset += 4;
6229 outrel.r_info
6230 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6231 }
6232 }
6233 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6234 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6235 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6236 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6237 else if (indx == 0)
6238 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6239 else
6240 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6241 if (indx == 0)
6242 {
6243 outrel.r_addend += relocation;
6244 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6245 outrel.r_addend -= htab->elf.tls_sec->vma;
6246 }
6247 loc = htab->relgot->contents;
6248 loc += (htab->relgot->reloc_count++
6249 * sizeof (Elf32_External_Rela));
6250 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6251 }
6252
6253 /* Init the .got section contents if we're not
6254 emitting a reloc. */
6255 else
6256 {
6257 bfd_vma value = relocation;
6258
6259 if (tls_ty == (TLS_TLS | TLS_LD))
6260 value = 1;
6261 else if (tls_ty != 0)
6262 {
6263 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6264 if (tls_ty == (TLS_TLS | TLS_TPREL))
6265 value += DTP_OFFSET - TP_OFFSET;
6266
6267 if (tls_ty == (TLS_TLS | TLS_GD))
6268 {
6269 bfd_put_32 (output_bfd, value,
6270 htab->got->contents + off + 4);
6271 value = 1;
6272 }
6273 }
6274 bfd_put_32 (output_bfd, value,
6275 htab->got->contents + off);
6276 }
6277
6278 off += 4;
6279 if (tls_ty & (TLS_LD | TLS_GD))
6280 off += 4;
6281 }
6282 while (tls_m != 0);
6283
6284 off = *offp;
6285 *offp = off | 1;
6286 }
6287
6288 if (off >= (bfd_vma) -2)
6289 abort ();
6290
6291 if ((tls_type & TLS_TLS) != 0)
6292 {
6293 if (tls_type != (TLS_TLS | TLS_LD))
6294 {
6295 if ((tls_mask & TLS_LD) != 0
6296 && !(h == NULL
6297 || !h->def_dynamic))
6298 off += 8;
6299 if (tls_type != (TLS_TLS | TLS_GD))
6300 {
6301 if ((tls_mask & TLS_GD) != 0)
6302 off += 8;
6303 if (tls_type != (TLS_TLS | TLS_DTPREL))
6304 {
6305 if ((tls_mask & TLS_DTPREL) != 0)
6306 off += 4;
6307 }
6308 }
6309 }
6310 }
6311
6312 relocation = htab->got->output_offset + off;
6313 relocation -= htab->elf.hgot->root.u.def.value;
6314
6315 /* Addends on got relocations don't make much sense.
6316 x+off@got is actually x@got+off, and since the got is
6317 generated by a hash table traversal, the value in the
6318 got at entry m+n bears little relation to the entry m. */
6319 if (addend != 0)
6320 (*_bfd_error_handler)
6321 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6322 input_bfd,
6323 input_section,
6324 (long) rel->r_offset,
6325 howto->name,
6326 sym_name);
6327 }
6328 break;
6329
6330 /* Relocations that need no special processing. */
6331 case R_PPC_LOCAL24PC:
6332 /* It makes no sense to point a local relocation
6333 at a symbol not in this object. */
6334 if (unresolved_reloc)
6335 {
6336 if (! (*info->callbacks->undefined_symbol) (info,
6337 h->root.root.string,
6338 input_bfd,
6339 input_section,
6340 rel->r_offset,
6341 TRUE))
6342 return FALSE;
6343 continue;
6344 }
6345 break;
6346
6347 case R_PPC_DTPREL16:
6348 case R_PPC_DTPREL16_LO:
6349 case R_PPC_DTPREL16_HI:
6350 case R_PPC_DTPREL16_HA:
6351 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6352 break;
6353
6354 /* Relocations that may need to be propagated if this is a shared
6355 object. */
6356 case R_PPC_TPREL16:
6357 case R_PPC_TPREL16_LO:
6358 case R_PPC_TPREL16_HI:
6359 case R_PPC_TPREL16_HA:
6360 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6361 /* The TPREL16 relocs shouldn't really be used in shared
6362 libs as they will result in DT_TEXTREL being set, but
6363 support them anyway. */
6364 goto dodyn;
6365
6366 case R_PPC_TPREL32:
6367 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6368 goto dodyn;
6369
6370 case R_PPC_DTPREL32:
6371 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6372 goto dodyn;
6373
6374 case R_PPC_DTPMOD32:
6375 relocation = 1;
6376 addend = 0;
6377 goto dodyn;
6378
6379 case R_PPC_REL16:
6380 case R_PPC_REL16_LO:
6381 case R_PPC_REL16_HI:
6382 case R_PPC_REL16_HA:
6383 break;
6384
6385 case R_PPC_REL24:
6386 case R_PPC_REL32:
6387 case R_PPC_REL14:
6388 case R_PPC_REL14_BRTAKEN:
6389 case R_PPC_REL14_BRNTAKEN:
6390 /* If these relocations are not to a named symbol, they can be
6391 handled right here, no need to bother the dynamic linker. */
6392 if (SYMBOL_REFERENCES_LOCAL (info, h)
6393 || h == htab->elf.hgot)
6394 break;
6395 /* fall through */
6396
6397 /* Relocations that always need to be propagated if this is a shared
6398 object. */
6399 case R_PPC_ADDR32:
6400 case R_PPC_ADDR24:
6401 case R_PPC_ADDR16:
6402 case R_PPC_ADDR16_LO:
6403 case R_PPC_ADDR16_HI:
6404 case R_PPC_ADDR16_HA:
6405 case R_PPC_ADDR14:
6406 case R_PPC_ADDR14_BRTAKEN:
6407 case R_PPC_ADDR14_BRNTAKEN:
6408 case R_PPC_UADDR32:
6409 case R_PPC_UADDR16:
6410 dodyn:
6411 if ((input_section->flags & SEC_ALLOC) == 0)
6412 break;
6413 /* Fall thru. */
6414
6415 if ((info->shared
6416 && (h == NULL
6417 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6418 || h->root.type != bfd_link_hash_undefweak)
6419 && (MUST_BE_DYN_RELOC (r_type)
6420 || !SYMBOL_CALLS_LOCAL (info, h)))
6421 || (ELIMINATE_COPY_RELOCS
6422 && !info->shared
6423 && h != NULL
6424 && h->dynindx != -1
6425 && !h->non_got_ref
6426 && h->def_dynamic
6427 && !h->def_regular))
6428 {
6429 int skip;
6430
6431 #ifdef DEBUG
6432 fprintf (stderr, "ppc_elf_relocate_section needs to "
6433 "create relocation for %s\n",
6434 (h && h->root.root.string
6435 ? h->root.root.string : "<unknown>"));
6436 #endif
6437
6438 /* When generating a shared object, these relocations
6439 are copied into the output file to be resolved at run
6440 time. */
6441 if (sreloc == NULL)
6442 {
6443 const char *name;
6444
6445 name = (bfd_elf_string_from_elf_section
6446 (input_bfd,
6447 elf_elfheader (input_bfd)->e_shstrndx,
6448 elf_section_data (input_section)->rel_hdr.sh_name));
6449 if (name == NULL)
6450 return FALSE;
6451
6452 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6453 && strcmp (bfd_get_section_name (input_bfd,
6454 input_section),
6455 name + 5) == 0);
6456
6457 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6458 BFD_ASSERT (sreloc != NULL);
6459 }
6460
6461 skip = 0;
6462
6463 outrel.r_offset =
6464 _bfd_elf_section_offset (output_bfd, info, input_section,
6465 rel->r_offset);
6466 if (outrel.r_offset == (bfd_vma) -1
6467 || outrel.r_offset == (bfd_vma) -2)
6468 skip = (int) outrel.r_offset;
6469 outrel.r_offset += (input_section->output_section->vma
6470 + input_section->output_offset);
6471
6472 if (skip)
6473 memset (&outrel, 0, sizeof outrel);
6474 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6475 {
6476 unresolved_reloc = FALSE;
6477 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6478 outrel.r_addend = rel->r_addend;
6479 }
6480 else
6481 {
6482 outrel.r_addend = relocation + rel->r_addend;
6483
6484 if (r_type == R_PPC_ADDR32)
6485 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6486 else
6487 {
6488 long indx;
6489
6490 if (bfd_is_abs_section (sec))
6491 indx = 0;
6492 else if (sec == NULL || sec->owner == NULL)
6493 {
6494 bfd_set_error (bfd_error_bad_value);
6495 return FALSE;
6496 }
6497 else
6498 {
6499 asection *osec;
6500
6501 /* We are turning this relocation into one
6502 against a section symbol. It would be
6503 proper to subtract the symbol's value,
6504 osec->vma, from the emitted reloc addend,
6505 but ld.so expects buggy relocs. */
6506 osec = sec->output_section;
6507 indx = elf_section_data (osec)->dynindx;
6508 if (indx == 0)
6509 {
6510 osec = htab->elf.text_index_section;
6511 indx = elf_section_data (osec)->dynindx;
6512 }
6513 BFD_ASSERT (indx != 0);
6514 #ifdef DEBUG
6515 if (indx == 0)
6516 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6517 indx, osec->name, osec->flags,
6518 h->root.root.string);
6519 #endif
6520 }
6521
6522 outrel.r_info = ELF32_R_INFO (indx, r_type);
6523 }
6524 }
6525
6526 loc = sreloc->contents;
6527 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6528 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6529
6530 if (skip == -1)
6531 continue;
6532
6533 /* This reloc will be computed at runtime. We clear the memory
6534 so that it contains predictable value. */
6535 if (! skip
6536 && ((input_section->flags & SEC_ALLOC) != 0
6537 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6538 {
6539 relocation = howto->pc_relative ? outrel.r_offset : 0;
6540 addend = 0;
6541 break;
6542 }
6543 }
6544 break;
6545
6546 case R_PPC_RELAX32PC_PLT:
6547 case R_PPC_RELAX32_PLT:
6548 {
6549 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6550
6551 if (htab->plt_type == PLT_NEW)
6552 relocation = (htab->glink->output_section->vma
6553 + htab->glink->output_offset
6554 + ent->glink_offset);
6555 else
6556 relocation = (htab->plt->output_section->vma
6557 + htab->plt->output_offset
6558 + ent->plt.offset);
6559 addend = 0;
6560 }
6561 if (r_type == R_PPC_RELAX32_PLT)
6562 goto relax32;
6563 /* Fall thru */
6564
6565 case R_PPC_RELAX32PC:
6566 relocation -= (input_section->output_section->vma
6567 + input_section->output_offset
6568 + rel->r_offset - 4);
6569 /* Fall thru */
6570
6571 case R_PPC_RELAX32:
6572 relax32:
6573 {
6574 unsigned long t0;
6575 unsigned long t1;
6576
6577 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6578 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6579
6580 /* We're clearing the bits for R_PPC_ADDR16_HA
6581 and R_PPC_ADDR16_LO here. */
6582 t0 &= ~0xffff;
6583 t1 &= ~0xffff;
6584
6585 /* t0 is HA, t1 is LO */
6586 relocation += addend;
6587 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6588 t1 |= relocation & 0xffff;
6589
6590 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6591 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6592 }
6593 continue;
6594
6595 /* Indirect .sdata relocation. */
6596 case R_PPC_EMB_SDAI16:
6597 BFD_ASSERT (htab->sdata[0].section != NULL);
6598 relocation
6599 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6600 h, relocation, rel);
6601 break;
6602
6603 /* Indirect .sdata2 relocation. */
6604 case R_PPC_EMB_SDA2I16:
6605 BFD_ASSERT (htab->sdata[1].section != NULL);
6606 relocation
6607 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6608 h, relocation, rel);
6609 break;
6610
6611 /* Handle the TOC16 reloc. We want to use the offset within the .got
6612 section, not the actual VMA. This is appropriate when generating
6613 an embedded ELF object, for which the .got section acts like the
6614 AIX .toc section. */
6615 case R_PPC_TOC16: /* phony GOT16 relocations */
6616 BFD_ASSERT (sec != NULL);
6617 BFD_ASSERT (bfd_is_und_section (sec)
6618 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6619 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6620
6621 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6622 break;
6623
6624 case R_PPC_PLTREL24:
6625 /* Relocation is to the entry for this symbol in the
6626 procedure linkage table. */
6627 {
6628 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6629
6630 addend = 0;
6631 if (ent == NULL
6632 || htab->plt == NULL)
6633 {
6634 /* We didn't make a PLT entry for this symbol. This
6635 happens when statically linking PIC code, or when
6636 using -Bsymbolic. */
6637 break;
6638 }
6639
6640 unresolved_reloc = FALSE;
6641 if (htab->plt_type == PLT_NEW)
6642 relocation = (htab->glink->output_section->vma
6643 + htab->glink->output_offset
6644 + ent->glink_offset);
6645 else
6646 relocation = (htab->plt->output_section->vma
6647 + htab->plt->output_offset
6648 + ent->plt.offset);
6649 }
6650 break;
6651
6652 /* Relocate against _SDA_BASE_. */
6653 case R_PPC_SDAREL16:
6654 {
6655 const char *name;
6656 struct elf_link_hash_entry *sh;
6657
6658 BFD_ASSERT (sec != NULL);
6659 name = bfd_get_section_name (abfd, sec->output_section);
6660 if (! ((CONST_STRNEQ (name, ".sdata")
6661 && (name[6] == 0 || name[6] == '.'))
6662 || (CONST_STRNEQ (name, ".sbss")
6663 && (name[5] == 0 || name[5] == '.'))))
6664 {
6665 (*_bfd_error_handler)
6666 (_("%B: the target (%s) of a %s relocation is "
6667 "in the wrong output section (%s)"),
6668 input_bfd,
6669 sym_name,
6670 howto->name,
6671 name);
6672 }
6673 sh = htab->sdata[0].sym;
6674 addend -= (sh->root.u.def.value
6675 + sh->root.u.def.section->output_offset
6676 + sh->root.u.def.section->output_section->vma);
6677 }
6678 break;
6679
6680 /* Relocate against _SDA2_BASE_. */
6681 case R_PPC_EMB_SDA2REL:
6682 {
6683 const char *name;
6684 struct elf_link_hash_entry *sh;
6685
6686 BFD_ASSERT (sec != NULL);
6687 name = bfd_get_section_name (abfd, sec->output_section);
6688 if (! (CONST_STRNEQ (name, ".sdata2")
6689 || CONST_STRNEQ (name, ".sbss2")))
6690 {
6691 (*_bfd_error_handler)
6692 (_("%B: the target (%s) of a %s relocation is "
6693 "in the wrong output section (%s)"),
6694 input_bfd,
6695 sym_name,
6696 howto->name,
6697 name);
6698
6699 bfd_set_error (bfd_error_bad_value);
6700 ret = FALSE;
6701 continue;
6702 }
6703 sh = htab->sdata[1].sym;
6704 addend -= (sh->root.u.def.value
6705 + sh->root.u.def.section->output_offset
6706 + sh->root.u.def.section->output_section->vma);
6707 }
6708 break;
6709
6710 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6711 case R_PPC_EMB_SDA21:
6712 case R_PPC_EMB_RELSDA:
6713 {
6714 const char *name;
6715 int reg;
6716 struct elf_link_hash_entry *sh;
6717
6718 BFD_ASSERT (sec != NULL);
6719 name = bfd_get_section_name (abfd, sec->output_section);
6720 if (((CONST_STRNEQ (name, ".sdata")
6721 && (name[6] == 0 || name[6] == '.'))
6722 || (CONST_STRNEQ (name, ".sbss")
6723 && (name[5] == 0 || name[5] == '.'))))
6724 {
6725 reg = 13;
6726 sh = htab->sdata[0].sym;
6727 addend -= (sh->root.u.def.value
6728 + sh->root.u.def.section->output_offset
6729 + sh->root.u.def.section->output_section->vma);
6730 }
6731
6732 else if (CONST_STRNEQ (name, ".sdata2")
6733 || CONST_STRNEQ (name, ".sbss2"))
6734 {
6735 reg = 2;
6736 sh = htab->sdata[1].sym;
6737 addend -= (sh->root.u.def.value
6738 + sh->root.u.def.section->output_offset
6739 + sh->root.u.def.section->output_section->vma);
6740 }
6741
6742 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6743 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6744 {
6745 reg = 0;
6746 }
6747
6748 else
6749 {
6750 (*_bfd_error_handler)
6751 (_("%B: the target (%s) of a %s relocation is "
6752 "in the wrong output section (%s)"),
6753 input_bfd,
6754 sym_name,
6755 howto->name,
6756 name);
6757
6758 bfd_set_error (bfd_error_bad_value);
6759 ret = FALSE;
6760 continue;
6761 }
6762
6763 if (r_type == R_PPC_EMB_SDA21)
6764 { /* fill in register field */
6765 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6766 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6767 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6768 }
6769 }
6770 break;
6771
6772 /* Relocate against the beginning of the section. */
6773 case R_PPC_SECTOFF:
6774 case R_PPC_SECTOFF_LO:
6775 case R_PPC_SECTOFF_HI:
6776 case R_PPC_SECTOFF_HA:
6777 BFD_ASSERT (sec != NULL);
6778 addend -= sec->output_section->vma;
6779 break;
6780
6781 /* Negative relocations. */
6782 case R_PPC_EMB_NADDR32:
6783 case R_PPC_EMB_NADDR16:
6784 case R_PPC_EMB_NADDR16_LO:
6785 case R_PPC_EMB_NADDR16_HI:
6786 case R_PPC_EMB_NADDR16_HA:
6787 addend -= 2 * relocation;
6788 break;
6789
6790 case R_PPC_COPY:
6791 case R_PPC_GLOB_DAT:
6792 case R_PPC_JMP_SLOT:
6793 case R_PPC_RELATIVE:
6794 case R_PPC_PLT32:
6795 case R_PPC_PLTREL32:
6796 case R_PPC_PLT16_LO:
6797 case R_PPC_PLT16_HI:
6798 case R_PPC_PLT16_HA:
6799 case R_PPC_ADDR30:
6800 case R_PPC_EMB_RELSEC16:
6801 case R_PPC_EMB_RELST_LO:
6802 case R_PPC_EMB_RELST_HI:
6803 case R_PPC_EMB_RELST_HA:
6804 case R_PPC_EMB_BIT_FLD:
6805 (*_bfd_error_handler)
6806 (_("%B: relocation %s is not yet supported for symbol %s."),
6807 input_bfd,
6808 howto->name,
6809 sym_name);
6810
6811 bfd_set_error (bfd_error_invalid_operation);
6812 ret = FALSE;
6813 continue;
6814 }
6815
6816 /* Do any further special processing. */
6817 switch (r_type)
6818 {
6819 default:
6820 break;
6821
6822 case R_PPC_ADDR16_HA:
6823 case R_PPC_REL16_HA:
6824 case R_PPC_SECTOFF_HA:
6825 case R_PPC_TPREL16_HA:
6826 case R_PPC_DTPREL16_HA:
6827 case R_PPC_EMB_NADDR16_HA:
6828 case R_PPC_EMB_RELST_HA:
6829 /* It's just possible that this symbol is a weak symbol
6830 that's not actually defined anywhere. In that case,
6831 'sec' would be NULL, and we should leave the symbol
6832 alone (it will be set to zero elsewhere in the link). */
6833 if (sec == NULL)
6834 break;
6835 /* Fall thru */
6836
6837 case R_PPC_PLT16_HA:
6838 case R_PPC_GOT16_HA:
6839 case R_PPC_GOT_TLSGD16_HA:
6840 case R_PPC_GOT_TLSLD16_HA:
6841 case R_PPC_GOT_TPREL16_HA:
6842 case R_PPC_GOT_DTPREL16_HA:
6843 /* Add 0x10000 if sign bit in 0:15 is set.
6844 Bits 0:15 are not used. */
6845 addend += 0x8000;
6846 break;
6847 }
6848
6849 #ifdef DEBUG
6850 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6851 "offset = %ld, addend = %ld\n",
6852 howto->name,
6853 (int) r_type,
6854 sym_name,
6855 r_symndx,
6856 (long) rel->r_offset,
6857 (long) addend);
6858 #endif
6859
6860 if (unresolved_reloc
6861 && !((input_section->flags & SEC_DEBUGGING) != 0
6862 && h->def_dynamic))
6863 {
6864 (*_bfd_error_handler)
6865 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6866 input_bfd,
6867 input_section,
6868 (long) rel->r_offset,
6869 howto->name,
6870 sym_name);
6871 ret = FALSE;
6872 }
6873
6874 r = _bfd_final_link_relocate (howto,
6875 input_bfd,
6876 input_section,
6877 contents,
6878 rel->r_offset,
6879 relocation,
6880 addend);
6881
6882 if (r != bfd_reloc_ok)
6883 {
6884 if (r == bfd_reloc_overflow)
6885 {
6886 if (warned)
6887 continue;
6888 if (h != NULL
6889 && h->root.type == bfd_link_hash_undefweak
6890 && howto->pc_relative)
6891 {
6892 /* Assume this is a call protected by other code that
6893 detect the symbol is undefined. If this is the case,
6894 we can safely ignore the overflow. If not, the
6895 program is hosed anyway, and a little warning isn't
6896 going to help. */
6897
6898 continue;
6899 }
6900
6901 if (! (*info->callbacks->reloc_overflow) (info,
6902 (h ? &h->root : NULL),
6903 sym_name,
6904 howto->name,
6905 rel->r_addend,
6906 input_bfd,
6907 input_section,
6908 rel->r_offset))
6909 return FALSE;
6910 }
6911 else
6912 {
6913 (*_bfd_error_handler)
6914 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6915 input_bfd, input_section,
6916 (long) rel->r_offset, howto->name, sym_name, (int) r);
6917 ret = FALSE;
6918 }
6919 }
6920 }
6921
6922 #ifdef DEBUG
6923 fprintf (stderr, "\n");
6924 #endif
6925
6926 return ret;
6927 }
6928 \f
6929 #define PPC_LO(v) ((v) & 0xffff)
6930 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6931 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6932
6933 /* Finish up dynamic symbol handling. We set the contents of various
6934 dynamic sections here. */
6935
6936 static bfd_boolean
6937 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6938 struct bfd_link_info *info,
6939 struct elf_link_hash_entry *h,
6940 Elf_Internal_Sym *sym)
6941 {
6942 struct ppc_elf_link_hash_table *htab;
6943 struct plt_entry *ent;
6944 bfd_boolean doneone;
6945
6946 #ifdef DEBUG
6947 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6948 h->root.root.string);
6949 #endif
6950
6951 htab = ppc_elf_hash_table (info);
6952 BFD_ASSERT (htab->elf.dynobj != NULL);
6953
6954 doneone = FALSE;
6955 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6956 if (ent->plt.offset != (bfd_vma) -1)
6957 {
6958 if (!doneone)
6959 {
6960 Elf_Internal_Rela rela;
6961 bfd_byte *loc;
6962 bfd_vma reloc_index;
6963
6964 if (htab->plt_type == PLT_NEW)
6965 reloc_index = ent->plt.offset / 4;
6966 else
6967 {
6968 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6969 / htab->plt_slot_size);
6970 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6971 && htab->plt_type == PLT_OLD)
6972 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6973 }
6974
6975 /* This symbol has an entry in the procedure linkage table.
6976 Set it up. */
6977 if (htab->plt_type == PLT_VXWORKS)
6978 {
6979 bfd_vma got_offset;
6980 const bfd_vma *plt_entry;
6981
6982 /* The first three entries in .got.plt are reserved. */
6983 got_offset = (reloc_index + 3) * 4;
6984
6985 /* Use the right PLT. */
6986 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6987 : ppc_elf_vxworks_plt_entry;
6988
6989 /* Fill in the .plt on VxWorks. */
6990 if (info->shared)
6991 {
6992 bfd_vma got_offset_hi = (got_offset >> 16)
6993 + ((got_offset & 0x8000) >> 15);
6994
6995 bfd_put_32 (output_bfd,
6996 plt_entry[0] | (got_offset_hi & 0xffff),
6997 htab->plt->contents + ent->plt.offset + 0);
6998 bfd_put_32 (output_bfd,
6999 plt_entry[1] | (got_offset & 0xffff),
7000 htab->plt->contents + ent->plt.offset + 4);
7001 }
7002 else
7003 {
7004 bfd_vma got_loc
7005 = (got_offset
7006 + htab->elf.hgot->root.u.def.value
7007 + htab->elf.hgot->root.u.def.section->output_offset
7008 + htab->elf.hgot->root.u.def.section->output_section->vma);
7009 bfd_vma got_loc_hi = (got_loc >> 16)
7010 + ((got_loc & 0x8000) >> 15);
7011
7012 bfd_put_32 (output_bfd,
7013 plt_entry[0] | (got_loc_hi & 0xffff),
7014 htab->plt->contents + ent->plt.offset + 0);
7015 bfd_put_32 (output_bfd,
7016 plt_entry[1] | (got_loc & 0xffff),
7017 htab->plt->contents + ent->plt.offset + 4);
7018 }
7019
7020 bfd_put_32 (output_bfd, plt_entry[2],
7021 htab->plt->contents + ent->plt.offset + 8);
7022 bfd_put_32 (output_bfd, plt_entry[3],
7023 htab->plt->contents + ent->plt.offset + 12);
7024
7025 /* This instruction is an immediate load. The value loaded is
7026 the byte offset of the R_PPC_JMP_SLOT relocation from the
7027 start of the .rela.plt section. The value is stored in the
7028 low-order 16 bits of the load instruction. */
7029 /* NOTE: It appears that this is now an index rather than a
7030 prescaled offset. */
7031 bfd_put_32 (output_bfd,
7032 plt_entry[4] | reloc_index,
7033 htab->plt->contents + ent->plt.offset + 16);
7034 /* This instruction is a PC-relative branch whose target is
7035 the start of the PLT section. The address of this branch
7036 instruction is 20 bytes beyond the start of this PLT entry.
7037 The address is encoded in bits 6-29, inclusive. The value
7038 stored is right-shifted by two bits, permitting a 26-bit
7039 offset. */
7040 bfd_put_32 (output_bfd,
7041 (plt_entry[5]
7042 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7043 htab->plt->contents + ent->plt.offset + 20);
7044 bfd_put_32 (output_bfd, plt_entry[6],
7045 htab->plt->contents + ent->plt.offset + 24);
7046 bfd_put_32 (output_bfd, plt_entry[7],
7047 htab->plt->contents + ent->plt.offset + 28);
7048
7049 /* Fill in the GOT entry corresponding to this PLT slot with
7050 the address immediately after the the "bctr" instruction
7051 in this PLT entry. */
7052 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7053 + htab->plt->output_offset
7054 + ent->plt.offset + 16),
7055 htab->sgotplt->contents + got_offset);
7056
7057 if (!info->shared)
7058 {
7059 /* Fill in a couple of entries in .rela.plt.unloaded. */
7060 loc = htab->srelplt2->contents
7061 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7062 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7063 * sizeof (Elf32_External_Rela));
7064
7065 /* Provide the @ha relocation for the first instruction. */
7066 rela.r_offset = (htab->plt->output_section->vma
7067 + htab->plt->output_offset
7068 + ent->plt.offset + 2);
7069 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7070 R_PPC_ADDR16_HA);
7071 rela.r_addend = got_offset;
7072 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7073 loc += sizeof (Elf32_External_Rela);
7074
7075 /* Provide the @l relocation for the second instruction. */
7076 rela.r_offset = (htab->plt->output_section->vma
7077 + htab->plt->output_offset
7078 + ent->plt.offset + 6);
7079 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7080 R_PPC_ADDR16_LO);
7081 rela.r_addend = got_offset;
7082 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7083 loc += sizeof (Elf32_External_Rela);
7084
7085 /* Provide a relocation for the GOT entry corresponding to this
7086 PLT slot. Point it at the middle of the .plt entry. */
7087 rela.r_offset = (htab->sgotplt->output_section->vma
7088 + htab->sgotplt->output_offset
7089 + got_offset);
7090 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7091 R_PPC_ADDR32);
7092 rela.r_addend = ent->plt.offset + 16;
7093 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7094 }
7095
7096 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7097 In particular, the offset for the relocation is not the
7098 address of the PLT entry for this function, as specified
7099 by the ABI. Instead, the offset is set to the address of
7100 the GOT slot for this function. See EABI 4.4.4.1. */
7101 rela.r_offset = (htab->sgotplt->output_section->vma
7102 + htab->sgotplt->output_offset
7103 + got_offset);
7104
7105 }
7106 else
7107 {
7108 rela.r_offset = (htab->plt->output_section->vma
7109 + htab->plt->output_offset
7110 + ent->plt.offset);
7111 if (htab->plt_type == PLT_OLD)
7112 {
7113 /* We don't need to fill in the .plt. The ppc dynamic
7114 linker will fill it in. */
7115 }
7116 else
7117 {
7118 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7119 + htab->glink->output_section->vma
7120 + htab->glink->output_offset);
7121 bfd_put_32 (output_bfd, val,
7122 htab->plt->contents + ent->plt.offset);
7123 }
7124 }
7125
7126 /* Fill in the entry in the .rela.plt section. */
7127 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7128 rela.r_addend = 0;
7129
7130 loc = (htab->relplt->contents
7131 + reloc_index * sizeof (Elf32_External_Rela));
7132 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7133
7134 if (!h->def_regular)
7135 {
7136 /* Mark the symbol as undefined, rather than as defined in
7137 the .plt section. Leave the value alone. */
7138 sym->st_shndx = SHN_UNDEF;
7139 /* If the symbol is weak, we do need to clear the value.
7140 Otherwise, the PLT entry would provide a definition for
7141 the symbol even if the symbol wasn't defined anywhere,
7142 and so the symbol would never be NULL. */
7143 if (!h->ref_regular_nonweak)
7144 sym->st_value = 0;
7145 }
7146 doneone = TRUE;
7147 }
7148
7149 if (htab->plt_type == PLT_NEW)
7150 {
7151 bfd_vma plt;
7152 unsigned char *p;
7153
7154 plt = (ent->plt.offset
7155 + htab->plt->output_section->vma
7156 + htab->plt->output_offset);
7157 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7158
7159 if (info->shared || info->pie)
7160 {
7161 bfd_vma got = 0;
7162
7163 if (ent->addend >= 32768)
7164 got = (ent->addend
7165 + ent->sec->output_section->vma
7166 + ent->sec->output_offset);
7167 else if (htab->elf.hgot != NULL)
7168 got = (htab->elf.hgot->root.u.def.value
7169 + htab->elf.hgot->root.u.def.section->output_section->vma
7170 + htab->elf.hgot->root.u.def.section->output_offset);
7171
7172 plt -= got;
7173
7174 if (plt + 0x8000 < 0x10000)
7175 {
7176 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7177 p += 4;
7178 bfd_put_32 (output_bfd, MTCTR_11, p);
7179 p += 4;
7180 bfd_put_32 (output_bfd, BCTR, p);
7181 p += 4;
7182 bfd_put_32 (output_bfd, NOP, p);
7183 p += 4;
7184 }
7185 else
7186 {
7187 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7188 p += 4;
7189 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7190 p += 4;
7191 bfd_put_32 (output_bfd, MTCTR_11, p);
7192 p += 4;
7193 bfd_put_32 (output_bfd, BCTR, p);
7194 p += 4;
7195 }
7196 }
7197 else
7198 {
7199 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7200 p += 4;
7201 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7202 p += 4;
7203 bfd_put_32 (output_bfd, MTCTR_11, p);
7204 p += 4;
7205 bfd_put_32 (output_bfd, BCTR, p);
7206 p += 4;
7207
7208 /* We only need one non-PIC glink stub. */
7209 break;
7210 }
7211 }
7212 else
7213 break;
7214 }
7215
7216 if (h->needs_copy)
7217 {
7218 asection *s;
7219 Elf_Internal_Rela rela;
7220 bfd_byte *loc;
7221
7222 /* This symbols needs a copy reloc. Set it up. */
7223
7224 #ifdef DEBUG
7225 fprintf (stderr, ", copy");
7226 #endif
7227
7228 BFD_ASSERT (h->dynindx != -1);
7229
7230 if (ppc_elf_hash_entry (h)->has_sda_refs)
7231 s = htab->relsbss;
7232 else
7233 s = htab->relbss;
7234 BFD_ASSERT (s != NULL);
7235
7236 rela.r_offset = (h->root.u.def.value
7237 + h->root.u.def.section->output_section->vma
7238 + h->root.u.def.section->output_offset);
7239 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7240 rela.r_addend = 0;
7241 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7242 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7243 }
7244
7245 #ifdef DEBUG
7246 fprintf (stderr, "\n");
7247 #endif
7248
7249 /* Mark some specially defined symbols as absolute. */
7250 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7251 || (!htab->is_vxworks
7252 && (h == htab->elf.hgot
7253 || strcmp (h->root.root.string,
7254 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7255 sym->st_shndx = SHN_ABS;
7256
7257 return TRUE;
7258 }
7259 \f
7260 static enum elf_reloc_type_class
7261 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7262 {
7263 switch (ELF32_R_TYPE (rela->r_info))
7264 {
7265 case R_PPC_RELATIVE:
7266 return reloc_class_relative;
7267 case R_PPC_REL24:
7268 case R_PPC_ADDR24:
7269 case R_PPC_JMP_SLOT:
7270 return reloc_class_plt;
7271 case R_PPC_COPY:
7272 return reloc_class_copy;
7273 default:
7274 return reloc_class_normal;
7275 }
7276 }
7277 \f
7278 /* Finish up the dynamic sections. */
7279
7280 static bfd_boolean
7281 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7282 struct bfd_link_info *info)
7283 {
7284 asection *sdyn;
7285 asection *splt;
7286 struct ppc_elf_link_hash_table *htab;
7287 bfd_vma got;
7288 bfd * dynobj;
7289
7290 #ifdef DEBUG
7291 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7292 #endif
7293
7294 htab = ppc_elf_hash_table (info);
7295 dynobj = elf_hash_table (info)->dynobj;
7296 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7297 if (htab->is_vxworks)
7298 splt = bfd_get_section_by_name (dynobj, ".plt");
7299 else
7300 splt = NULL;
7301
7302 got = 0;
7303 if (htab->elf.hgot != NULL)
7304 got = (htab->elf.hgot->root.u.def.value
7305 + htab->elf.hgot->root.u.def.section->output_section->vma
7306 + htab->elf.hgot->root.u.def.section->output_offset);
7307
7308 if (htab->elf.dynamic_sections_created)
7309 {
7310 Elf32_External_Dyn *dyncon, *dynconend;
7311
7312 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7313
7314 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7315 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7316 for (; dyncon < dynconend; dyncon++)
7317 {
7318 Elf_Internal_Dyn dyn;
7319 asection *s;
7320
7321 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7322
7323 switch (dyn.d_tag)
7324 {
7325 case DT_PLTGOT:
7326 if (htab->is_vxworks)
7327 s = htab->sgotplt;
7328 else
7329 s = htab->plt;
7330 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7331 break;
7332
7333 case DT_PLTRELSZ:
7334 dyn.d_un.d_val = htab->relplt->size;
7335 break;
7336
7337 case DT_JMPREL:
7338 s = htab->relplt;
7339 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7340 break;
7341
7342 case DT_PPC_GOT:
7343 dyn.d_un.d_ptr = got;
7344 break;
7345
7346 case DT_RELASZ:
7347 if (htab->is_vxworks)
7348 {
7349 if (htab->relplt)
7350 dyn.d_un.d_ptr -= htab->relplt->size;
7351 break;
7352 }
7353 continue;
7354
7355 default:
7356 continue;
7357 }
7358
7359 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7360 }
7361 }
7362
7363 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7364 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7365 if (htab->got != NULL)
7366 {
7367 unsigned char *p = htab->got->contents;
7368 bfd_vma val;
7369
7370 p += htab->elf.hgot->root.u.def.value;
7371 if (htab->plt_type == PLT_OLD)
7372 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7373
7374 val = 0;
7375 if (sdyn != NULL)
7376 val = sdyn->output_section->vma + sdyn->output_offset;
7377 bfd_put_32 (output_bfd, val, p);
7378
7379 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7380 }
7381
7382 /* Fill in the first entry in the VxWorks procedure linkage table. */
7383 if (splt && splt->size > 0)
7384 {
7385 /* Use the right PLT. */
7386 static const bfd_vma *plt_entry = NULL;
7387 plt_entry = info->shared ?
7388 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7389
7390 if (!info->shared)
7391 {
7392 bfd_vma got_value =
7393 (htab->elf.hgot->root.u.def.section->output_section->vma
7394 + htab->elf.hgot->root.u.def.section->output_offset
7395 + htab->elf.hgot->root.u.def.value);
7396 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7397
7398 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7399 splt->contents + 0);
7400 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7401 splt->contents + 4);
7402 }
7403 else
7404 {
7405 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7406 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7407 }
7408 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7409 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7410 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7411 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7412 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7413 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7414
7415 if (! info->shared)
7416 {
7417 Elf_Internal_Rela rela;
7418 bfd_byte *loc;
7419
7420 loc = htab->srelplt2->contents;
7421
7422 /* Output the @ha relocation for the first instruction. */
7423 rela.r_offset = (htab->plt->output_section->vma
7424 + htab->plt->output_offset
7425 + 2);
7426 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7427 rela.r_addend = 0;
7428 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7429 loc += sizeof (Elf32_External_Rela);
7430
7431 /* Output the @l relocation for the second instruction. */
7432 rela.r_offset = (htab->plt->output_section->vma
7433 + htab->plt->output_offset
7434 + 6);
7435 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7436 rela.r_addend = 0;
7437 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7438 loc += sizeof (Elf32_External_Rela);
7439
7440 /* Fix up the remaining relocations. They may have the wrong
7441 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7442 in which symbols were output. */
7443 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7444 {
7445 Elf_Internal_Rela rel;
7446
7447 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7448 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7449 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7450 loc += sizeof (Elf32_External_Rela);
7451
7452 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7453 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7454 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7455 loc += sizeof (Elf32_External_Rela);
7456
7457 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7458 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7459 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7460 loc += sizeof (Elf32_External_Rela);
7461 }
7462 }
7463 }
7464
7465 if (htab->glink != NULL && htab->glink->contents != NULL)
7466 {
7467 unsigned char *p;
7468 unsigned char *endp;
7469 bfd_vma res0;
7470 unsigned int i;
7471
7472 /*
7473 * PIC glink code is the following:
7474 *
7475 * # ith PLT code stub.
7476 * addis 11,30,(plt+(i-1)*4-got)@ha
7477 * lwz 11,(plt+(i-1)*4-got)@l(11)
7478 * mtctr 11
7479 * bctr
7480 *
7481 * # A table of branches, one for each plt entry.
7482 * # The idea is that the plt call stub loads ctr (and r11) with these
7483 * # addresses, so (r11 - res_0) gives the plt index * 4.
7484 * res_0: b PLTresolve
7485 * res_1: b PLTresolve
7486 * .
7487 * # Some number of entries towards the end can be nops
7488 * res_n_m3: nop
7489 * res_n_m2: nop
7490 * res_n_m1:
7491 *
7492 * PLTresolve:
7493 * addis 11,11,(1f-res_0)@ha
7494 * mflr 0
7495 * bcl 20,31,1f
7496 * 1: addi 11,11,(1b-res_0)@l
7497 * mflr 12
7498 * mtlr 0
7499 * sub 11,11,12 # r11 = index * 4
7500 * addis 12,12,(got+4-1b)@ha
7501 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7502 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7503 * mtctr 0
7504 * add 0,11,11
7505 * add 11,0,11 # r11 = index * 12 = reloc offset.
7506 * bctr
7507 */
7508 static const unsigned int pic_plt_resolve[] =
7509 {
7510 ADDIS_11_11,
7511 MFLR_0,
7512 BCL_20_31,
7513 ADDI_11_11,
7514 MFLR_12,
7515 MTLR_0,
7516 SUB_11_11_12,
7517 ADDIS_12_12,
7518 LWZ_0_12,
7519 LWZ_12_12,
7520 MTCTR_0,
7521 ADD_0_11_11,
7522 ADD_11_0_11,
7523 BCTR,
7524 NOP,
7525 NOP
7526 };
7527
7528 static const unsigned int plt_resolve[] =
7529 {
7530 LIS_12,
7531 ADDIS_11_11,
7532 LWZ_0_12,
7533 ADDI_11_11,
7534 MTCTR_0,
7535 ADD_0_11_11,
7536 LWZ_12_12,
7537 ADD_11_0_11,
7538 BCTR,
7539 NOP,
7540 NOP,
7541 NOP,
7542 NOP,
7543 NOP,
7544 NOP,
7545 NOP
7546 };
7547
7548 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7549 abort ();
7550 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7551 abort ();
7552
7553 /* Build the branch table, one for each plt entry (less one),
7554 and perhaps some padding. */
7555 p = htab->glink->contents;
7556 p += htab->glink_pltresolve;
7557 endp = htab->glink->contents;
7558 endp += htab->glink->size - GLINK_PLTRESOLVE;
7559 while (p < endp - 8 * 4)
7560 {
7561 bfd_put_32 (output_bfd, B + endp - p, p);
7562 p += 4;
7563 }
7564 while (p < endp)
7565 {
7566 bfd_put_32 (output_bfd, NOP, p);
7567 p += 4;
7568 }
7569
7570 res0 = (htab->glink_pltresolve
7571 + htab->glink->output_section->vma
7572 + htab->glink->output_offset);
7573
7574 /* Last comes the PLTresolve stub. */
7575 if (info->shared || info->pie)
7576 {
7577 bfd_vma bcl;
7578
7579 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7580 {
7581 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7582 p += 4;
7583 }
7584 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7585
7586 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7587 + htab->glink->output_section->vma
7588 + htab->glink->output_offset);
7589
7590 bfd_put_32 (output_bfd,
7591 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7592 bfd_put_32 (output_bfd,
7593 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7594 bfd_put_32 (output_bfd,
7595 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7596 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7597 {
7598 bfd_put_32 (output_bfd,
7599 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7600 bfd_put_32 (output_bfd,
7601 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7602 }
7603 else
7604 {
7605 bfd_put_32 (output_bfd,
7606 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7607 bfd_put_32 (output_bfd,
7608 LWZ_12_12 + 4, p + 9*4);
7609 }
7610 }
7611 else
7612 {
7613 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7614 {
7615 bfd_put_32 (output_bfd, plt_resolve[i], p);
7616 p += 4;
7617 }
7618 p -= 4 * ARRAY_SIZE (plt_resolve);
7619
7620 bfd_put_32 (output_bfd,
7621 LIS_12 + PPC_HA (got + 4), p + 0*4);
7622 bfd_put_32 (output_bfd,
7623 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7624 bfd_put_32 (output_bfd,
7625 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7626 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7627 {
7628 bfd_put_32 (output_bfd,
7629 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7630 bfd_put_32 (output_bfd,
7631 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7632 }
7633 else
7634 {
7635 bfd_put_32 (output_bfd,
7636 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7637 bfd_put_32 (output_bfd,
7638 LWZ_12_12 + 4, p + 6*4);
7639 }
7640 }
7641 }
7642
7643 return TRUE;
7644 }
7645 \f
7646 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7647 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7648 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7649 #define TARGET_BIG_NAME "elf32-powerpc"
7650 #define ELF_ARCH bfd_arch_powerpc
7651 #define ELF_MACHINE_CODE EM_PPC
7652 #ifdef __QNXTARGET__
7653 #define ELF_MAXPAGESIZE 0x1000
7654 #else
7655 #define ELF_MAXPAGESIZE 0x10000
7656 #endif
7657 #define ELF_MINPAGESIZE 0x1000
7658 #define ELF_COMMONPAGESIZE 0x1000
7659 #define elf_info_to_howto ppc_elf_info_to_howto
7660
7661 #ifdef EM_CYGNUS_POWERPC
7662 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7663 #endif
7664
7665 #ifdef EM_PPC_OLD
7666 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7667 #endif
7668
7669 #define elf_backend_plt_not_loaded 1
7670 #define elf_backend_can_gc_sections 1
7671 #define elf_backend_can_refcount 1
7672 #define elf_backend_rela_normal 1
7673
7674 #define bfd_elf32_mkobject ppc_elf_mkobject
7675 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7676 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7677 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7678 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7679 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7680 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7681
7682 #define elf_backend_object_p ppc_elf_object_p
7683 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7684 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7685 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7686 #define elf_backend_relocate_section ppc_elf_relocate_section
7687 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7688 #define elf_backend_check_relocs ppc_elf_check_relocs
7689 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7690 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7691 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7692 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7693 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7694 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7695 #define elf_backend_fake_sections ppc_elf_fake_sections
7696 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7697 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7698 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7699 #define elf_backend_write_core_note ppc_elf_write_core_note
7700 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7701 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7702 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7703 #define elf_backend_write_section ppc_elf_write_section
7704 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7705 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7706 #define elf_backend_action_discarded ppc_elf_action_discarded
7707 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7708
7709 #include "elf32-target.h"
7710
7711 /* VxWorks Target */
7712
7713 #undef TARGET_LITTLE_SYM
7714 #undef TARGET_LITTLE_NAME
7715
7716 #undef TARGET_BIG_SYM
7717 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7718 #undef TARGET_BIG_NAME
7719 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7720
7721 /* VxWorks uses the elf default section flags for .plt. */
7722 static const struct bfd_elf_special_section *
7723 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7724 {
7725 if (sec->name == NULL)
7726 return NULL;
7727
7728 if (strcmp (sec->name, ".plt") == 0)
7729 return _bfd_elf_get_sec_type_attr (abfd, sec);
7730
7731 return ppc_elf_get_sec_type_attr (abfd, sec);
7732 }
7733
7734 /* Like ppc_elf_link_hash_table_create, but overrides
7735 appropriately for VxWorks. */
7736 static struct bfd_link_hash_table *
7737 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7738 {
7739 struct bfd_link_hash_table *ret;
7740
7741 ret = ppc_elf_link_hash_table_create (abfd);
7742 if (ret)
7743 {
7744 struct ppc_elf_link_hash_table *htab
7745 = (struct ppc_elf_link_hash_table *)ret;
7746 htab->is_vxworks = 1;
7747 htab->plt_type = PLT_VXWORKS;
7748 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7749 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7750 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7751 }
7752 return ret;
7753 }
7754
7755 /* Tweak magic VxWorks symbols as they are loaded. */
7756 static bfd_boolean
7757 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7758 struct bfd_link_info *info,
7759 Elf_Internal_Sym *sym,
7760 const char **namep ATTRIBUTE_UNUSED,
7761 flagword *flagsp ATTRIBUTE_UNUSED,
7762 asection **secp,
7763 bfd_vma *valp)
7764 {
7765 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7766 valp))
7767 return FALSE;
7768
7769 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7770 }
7771
7772 static void
7773 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7774 {
7775 ppc_elf_final_write_processing(abfd, linker);
7776 elf_vxworks_final_write_processing(abfd, linker);
7777 }
7778
7779 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7780 define it. */
7781 #undef elf_backend_want_plt_sym
7782 #define elf_backend_want_plt_sym 1
7783 #undef elf_backend_want_got_plt
7784 #define elf_backend_want_got_plt 1
7785 #undef elf_backend_got_symbol_offset
7786 #define elf_backend_got_symbol_offset 0
7787 #undef elf_backend_plt_not_loaded
7788 #define elf_backend_plt_not_loaded 0
7789 #undef elf_backend_plt_readonly
7790 #define elf_backend_plt_readonly 1
7791 #undef elf_backend_got_header_size
7792 #define elf_backend_got_header_size 12
7793
7794 #undef bfd_elf32_bfd_link_hash_table_create
7795 #define bfd_elf32_bfd_link_hash_table_create \
7796 ppc_elf_vxworks_link_hash_table_create
7797 #undef elf_backend_add_symbol_hook
7798 #define elf_backend_add_symbol_hook \
7799 ppc_elf_vxworks_add_symbol_hook
7800 #undef elf_backend_link_output_symbol_hook
7801 #define elf_backend_link_output_symbol_hook \
7802 elf_vxworks_link_output_symbol_hook
7803 #undef elf_backend_final_write_processing
7804 #define elf_backend_final_write_processing \
7805 ppc_elf_vxworks_final_write_processing
7806 #undef elf_backend_get_sec_type_attr
7807 #define elf_backend_get_sec_type_attr \
7808 ppc_elf_vxworks_get_sec_type_attr
7809 #undef elf_backend_emit_relocs
7810 #define elf_backend_emit_relocs \
7811 elf_vxworks_emit_relocs
7812
7813 #undef elf32_bed
7814 #define elf32_bed ppc_elf_vxworks_bed
7815
7816 #include "elf32-target.h"
GDB Binutils - Deliverables
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