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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 htab->tlsld_got.refcount += 1;
3113 tls_type = TLS_TLS | TLS_LD;
3114 goto dogottls;
3115
3116 case R_PPC_GOT_TLSGD16:
3117 case R_PPC_GOT_TLSGD16_LO:
3118 case R_PPC_GOT_TLSGD16_HI:
3119 case R_PPC_GOT_TLSGD16_HA:
3120 tls_type = TLS_TLS | TLS_GD;
3121 goto dogottls;
3122
3123 case R_PPC_GOT_TPREL16:
3124 case R_PPC_GOT_TPREL16_LO:
3125 case R_PPC_GOT_TPREL16_HI:
3126 case R_PPC_GOT_TPREL16_HA:
3127 if (info->shared)
3128 info->flags |= DF_STATIC_TLS;
3129 tls_type = TLS_TLS | TLS_TPREL;
3130 goto dogottls;
3131
3132 case R_PPC_GOT_DTPREL16:
3133 case R_PPC_GOT_DTPREL16_LO:
3134 case R_PPC_GOT_DTPREL16_HI:
3135 case R_PPC_GOT_DTPREL16_HA:
3136 tls_type = TLS_TLS | TLS_DTPREL;
3137 dogottls:
3138 sec->has_tls_reloc = 1;
3139 /* Fall thru */
3140
3141 /* GOT16 relocations */
3142 case R_PPC_GOT16:
3143 case R_PPC_GOT16_LO:
3144 case R_PPC_GOT16_HI:
3145 case R_PPC_GOT16_HA:
3146 /* This symbol requires a global offset table entry. */
3147 if (htab->got == NULL)
3148 {
3149 if (htab->elf.dynobj == NULL)
3150 htab->elf.dynobj = abfd;
3151 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3152 return FALSE;
3153 }
3154 if (h != NULL)
3155 {
3156 h->got.refcount += 1;
3157 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3158 }
3159 else
3160 /* This is a global offset table entry for a local symbol. */
3161 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3162 return FALSE;
3163 break;
3164
3165 /* Indirect .sdata relocation. */
3166 case R_PPC_EMB_SDAI16:
3167 if (info->shared)
3168 {
3169 bad_shared_reloc (abfd, r_type);
3170 return FALSE;
3171 }
3172 if (htab->sdata[0].section == NULL
3173 && !ppc_elf_create_linker_section (abfd, info, 0,
3174 &htab->sdata[0]))
3175 return FALSE;
3176 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3177 h, rel))
3178 return FALSE;
3179 if (h != NULL)
3180 {
3181 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3182 h->non_got_ref = TRUE;
3183 }
3184 break;
3185
3186 /* Indirect .sdata2 relocation. */
3187 case R_PPC_EMB_SDA2I16:
3188 if (info->shared)
3189 {
3190 bad_shared_reloc (abfd, r_type);
3191 return FALSE;
3192 }
3193 if (htab->sdata[1].section == NULL
3194 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3195 &htab->sdata[1]))
3196 return FALSE;
3197 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3198 h, rel))
3199 return FALSE;
3200 if (h != NULL)
3201 {
3202 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3203 h->non_got_ref = TRUE;
3204 }
3205 break;
3206
3207 case R_PPC_SDAREL16:
3208 if (info->shared)
3209 {
3210 bad_shared_reloc (abfd, r_type);
3211 return FALSE;
3212 }
3213 if (htab->sdata[0].sym == NULL
3214 && !create_sdata_sym (htab, &htab->sdata[0]))
3215 return FALSE;
3216 if (h != NULL)
3217 {
3218 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3219 h->non_got_ref = TRUE;
3220 }
3221 break;
3222
3223 case R_PPC_EMB_SDA2REL:
3224 if (info->shared)
3225 {
3226 bad_shared_reloc (abfd, r_type);
3227 return FALSE;
3228 }
3229 if (htab->sdata[1].sym == NULL
3230 && !create_sdata_sym (htab, &htab->sdata[1]))
3231 return FALSE;
3232 if (h != NULL)
3233 {
3234 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3235 h->non_got_ref = TRUE;
3236 }
3237 break;
3238
3239 case R_PPC_EMB_SDA21:
3240 case R_PPC_EMB_RELSDA:
3241 if (info->shared)
3242 {
3243 bad_shared_reloc (abfd, r_type);
3244 return FALSE;
3245 }
3246 if (htab->sdata[0].sym == NULL
3247 && !create_sdata_sym (htab, &htab->sdata[0]))
3248 return FALSE;
3249 if (htab->sdata[1].sym == NULL
3250 && !create_sdata_sym (htab, &htab->sdata[1]))
3251 return FALSE;
3252 if (h != NULL)
3253 {
3254 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3255 h->non_got_ref = TRUE;
3256 }
3257 break;
3258
3259 case R_PPC_EMB_NADDR32:
3260 case R_PPC_EMB_NADDR16:
3261 case R_PPC_EMB_NADDR16_LO:
3262 case R_PPC_EMB_NADDR16_HI:
3263 case R_PPC_EMB_NADDR16_HA:
3264 if (info->shared)
3265 {
3266 bad_shared_reloc (abfd, r_type);
3267 return FALSE;
3268 }
3269 if (h != NULL)
3270 h->non_got_ref = TRUE;
3271 break;
3272
3273 case R_PPC_PLT32:
3274 case R_PPC_PLTREL24:
3275 case R_PPC_PLTREL32:
3276 case R_PPC_PLT16_LO:
3277 case R_PPC_PLT16_HI:
3278 case R_PPC_PLT16_HA:
3279 #ifdef DEBUG
3280 fprintf (stderr, "Reloc requires a PLT entry\n");
3281 #endif
3282 /* This symbol requires a procedure linkage table entry. We
3283 actually build the entry in finish_dynamic_symbol,
3284 because this might be a case of linking PIC code without
3285 linking in any dynamic objects, in which case we don't
3286 need to generate a procedure linkage table after all. */
3287
3288 if (h == NULL)
3289 {
3290 /* It does not make sense to have a procedure linkage
3291 table entry for a local symbol. */
3292 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3293 "local symbol"),
3294 abfd,
3295 sec,
3296 (long) rel->r_offset,
3297 ppc_elf_howto_table[r_type]->name);
3298 bfd_set_error (bfd_error_bad_value);
3299 return FALSE;
3300 }
3301 else
3302 {
3303 bfd_vma addend = 0;
3304
3305 if (r_type == R_PPC_PLTREL24)
3306 {
3307 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3308 addend = rel->r_addend;
3309 }
3310 h->needs_plt = 1;
3311 if (!update_plt_info (abfd, h, got2, addend))
3312 return FALSE;
3313 }
3314 break;
3315
3316 /* The following relocations don't need to propagate the
3317 relocation if linking a shared object since they are
3318 section relative. */
3319 case R_PPC_SECTOFF:
3320 case R_PPC_SECTOFF_LO:
3321 case R_PPC_SECTOFF_HI:
3322 case R_PPC_SECTOFF_HA:
3323 case R_PPC_DTPREL16:
3324 case R_PPC_DTPREL16_LO:
3325 case R_PPC_DTPREL16_HI:
3326 case R_PPC_DTPREL16_HA:
3327 case R_PPC_TOC16:
3328 break;
3329
3330 case R_PPC_REL16:
3331 case R_PPC_REL16_LO:
3332 case R_PPC_REL16_HI:
3333 case R_PPC_REL16_HA:
3334 ppc_elf_tdata (abfd)->has_rel16 = 1;
3335 break;
3336
3337 /* These are just markers. */
3338 case R_PPC_TLS:
3339 case R_PPC_EMB_MRKREF:
3340 case R_PPC_NONE:
3341 case R_PPC_max:
3342 break;
3343
3344 /* These should only appear in dynamic objects. */
3345 case R_PPC_COPY:
3346 case R_PPC_GLOB_DAT:
3347 case R_PPC_JMP_SLOT:
3348 case R_PPC_RELATIVE:
3349 break;
3350
3351 /* These aren't handled yet. We'll report an error later. */
3352 case R_PPC_ADDR30:
3353 case R_PPC_EMB_RELSEC16:
3354 case R_PPC_EMB_RELST_LO:
3355 case R_PPC_EMB_RELST_HI:
3356 case R_PPC_EMB_RELST_HA:
3357 case R_PPC_EMB_BIT_FLD:
3358 break;
3359
3360 /* This refers only to functions defined in the shared library. */
3361 case R_PPC_LOCAL24PC:
3362 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3363 {
3364 htab->plt_type = PLT_OLD;
3365 htab->old_bfd = abfd;
3366 }
3367 break;
3368
3369 /* This relocation describes the C++ object vtable hierarchy.
3370 Reconstruct it for later use during GC. */
3371 case R_PPC_GNU_VTINHERIT:
3372 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3373 return FALSE;
3374 break;
3375
3376 /* This relocation describes which C++ vtable entries are actually
3377 used. Record for later use during GC. */
3378 case R_PPC_GNU_VTENTRY:
3379 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3380 return FALSE;
3381 break;
3382
3383 /* We shouldn't really be seeing these. */
3384 case R_PPC_TPREL32:
3385 if (info->shared)
3386 info->flags |= DF_STATIC_TLS;
3387 goto dodyn;
3388
3389 /* Nor these. */
3390 case R_PPC_DTPMOD32:
3391 case R_PPC_DTPREL32:
3392 goto dodyn;
3393
3394 case R_PPC_TPREL16:
3395 case R_PPC_TPREL16_LO:
3396 case R_PPC_TPREL16_HI:
3397 case R_PPC_TPREL16_HA:
3398 if (info->shared)
3399 info->flags |= DF_STATIC_TLS;
3400 goto dodyn;
3401
3402 case R_PPC_REL32:
3403 if (h == NULL
3404 && got2 != NULL
3405 && (sec->flags & SEC_CODE) != 0
3406 && (info->shared || info->pie)
3407 && htab->plt_type == PLT_UNSET)
3408 {
3409 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3410 the start of a function, which assembles to a REL32
3411 reference to .got2. If we detect one of these, then
3412 force the old PLT layout because the linker cannot
3413 reliably deduce the GOT pointer value needed for
3414 PLT call stubs. */
3415 asection *s;
3416
3417 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3418 r_symndx);
3419 if (s == got2)
3420 {
3421 htab->plt_type = PLT_OLD;
3422 htab->old_bfd = abfd;
3423 }
3424 }
3425 if (h == NULL || h == htab->elf.hgot)
3426 break;
3427 goto dodyn1;
3428
3429 case R_PPC_REL24:
3430 case R_PPC_REL14:
3431 case R_PPC_REL14_BRTAKEN:
3432 case R_PPC_REL14_BRNTAKEN:
3433 if (h == NULL)
3434 break;
3435 if (h == htab->elf.hgot)
3436 {
3437 if (htab->plt_type == PLT_UNSET)
3438 {
3439 htab->plt_type = PLT_OLD;
3440 htab->old_bfd = abfd;
3441 }
3442 break;
3443 }
3444 /* fall through */
3445
3446 case R_PPC_ADDR32:
3447 case R_PPC_ADDR24:
3448 case R_PPC_ADDR16:
3449 case R_PPC_ADDR16_LO:
3450 case R_PPC_ADDR16_HI:
3451 case R_PPC_ADDR16_HA:
3452 case R_PPC_ADDR14:
3453 case R_PPC_ADDR14_BRTAKEN:
3454 case R_PPC_ADDR14_BRNTAKEN:
3455 case R_PPC_UADDR32:
3456 case R_PPC_UADDR16:
3457 dodyn1:
3458 if (h != NULL && !info->shared)
3459 {
3460 /* We may need a plt entry if the symbol turns out to be
3461 a function defined in a dynamic object. */
3462 if (!update_plt_info (abfd, h, NULL, 0))
3463 return FALSE;
3464
3465 /* We may need a copy reloc too. */
3466 h->non_got_ref = 1;
3467 }
3468
3469 dodyn:
3470 /* If we are creating a shared library, and this is a reloc
3471 against a global symbol, or a non PC relative reloc
3472 against a local symbol, then we need to copy the reloc
3473 into the shared library. However, if we are linking with
3474 -Bsymbolic, we do not need to copy a reloc against a
3475 global symbol which is defined in an object we are
3476 including in the link (i.e., DEF_REGULAR is set). At
3477 this point we have not seen all the input files, so it is
3478 possible that DEF_REGULAR is not set now but will be set
3479 later (it is never cleared). In case of a weak definition,
3480 DEF_REGULAR may be cleared later by a strong definition in
3481 a shared library. We account for that possibility below by
3482 storing information in the dyn_relocs field of the hash
3483 table entry. A similar situation occurs when creating
3484 shared libraries and symbol visibility changes render the
3485 symbol local.
3486
3487 If on the other hand, we are creating an executable, we
3488 may need to keep relocations for symbols satisfied by a
3489 dynamic library if we manage to avoid copy relocs for the
3490 symbol. */
3491 if ((info->shared
3492 && (MUST_BE_DYN_RELOC (r_type)
3493 || (h != NULL
3494 && (! info->symbolic
3495 || h->root.type == bfd_link_hash_defweak
3496 || !h->def_regular))))
3497 || (ELIMINATE_COPY_RELOCS
3498 && !info->shared
3499 && h != NULL
3500 && (h->root.type == bfd_link_hash_defweak
3501 || !h->def_regular)))
3502 {
3503 struct ppc_elf_dyn_relocs *p;
3504 struct ppc_elf_dyn_relocs **head;
3505
3506 #ifdef DEBUG
3507 fprintf (stderr,
3508 "ppc_elf_check_relocs needs to "
3509 "create relocation for %s\n",
3510 (h && h->root.root.string
3511 ? h->root.root.string : "<unknown>"));
3512 #endif
3513 if (sreloc == NULL)
3514 {
3515 const char *name;
3516
3517 name = (bfd_elf_string_from_elf_section
3518 (abfd,
3519 elf_elfheader (abfd)->e_shstrndx,
3520 elf_section_data (sec)->rel_hdr.sh_name));
3521 if (name == NULL)
3522 return FALSE;
3523
3524 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3525 && strcmp (bfd_get_section_name (abfd, sec),
3526 name + 5) == 0);
3527
3528 if (htab->elf.dynobj == NULL)
3529 htab->elf.dynobj = abfd;
3530 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3531 if (sreloc == NULL)
3532 {
3533 flagword flags;
3534
3535 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3536 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3537 | SEC_ALLOC | SEC_LOAD);
3538 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3539 name,
3540 flags);
3541 if (sreloc == NULL
3542 || ! bfd_set_section_alignment (htab->elf.dynobj,
3543 sreloc, 2))
3544 return FALSE;
3545 }
3546 elf_section_data (sec)->sreloc = sreloc;
3547 }
3548
3549 /* If this is a global symbol, we count the number of
3550 relocations we need for this symbol. */
3551 if (h != NULL)
3552 {
3553 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3554 }
3555 else
3556 {
3557 /* Track dynamic relocs needed for local syms too.
3558 We really need local syms available to do this
3559 easily. Oh well. */
3560
3561 asection *s;
3562 void *vpp;
3563
3564 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3565 sec, r_symndx);
3566 if (s == NULL)
3567 return FALSE;
3568
3569 vpp = &elf_section_data (s)->local_dynrel;
3570 head = (struct ppc_elf_dyn_relocs **) vpp;
3571 }
3572
3573 p = *head;
3574 if (p == NULL || p->sec != sec)
3575 {
3576 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3577 if (p == NULL)
3578 return FALSE;
3579 p->next = *head;
3580 *head = p;
3581 p->sec = sec;
3582 p->count = 0;
3583 p->pc_count = 0;
3584 }
3585
3586 p->count += 1;
3587 if (!MUST_BE_DYN_RELOC (r_type))
3588 p->pc_count += 1;
3589 }
3590
3591 break;
3592 }
3593 }
3594
3595 return TRUE;
3596 }
3597 \f
3598
3599 /* Merge object attributes from IBFD into OBFD. Raise an error if
3600 there are conflicting attributes. */
3601 static bfd_boolean
3602 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3603 {
3604 obj_attribute *in_attr;
3605 obj_attribute *out_attr;
3606
3607 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3608 {
3609 /* This is the first object. Copy the attributes. */
3610 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3611
3612 /* Use the Tag_null value to indicate the attributes have been
3613 initialized. */
3614 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3615
3616 return TRUE;
3617 }
3618
3619 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3620 non-conflicting ones. */
3621 in_attr = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3622 out_attr = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3623 if (in_attr[Tag_GNU_Power_ABI_FP].i != out_attr[Tag_GNU_Power_ABI_FP].i)
3624 {
3625 out_attr[Tag_GNU_Power_ABI_FP].type = 1;
3626 if (out_attr[Tag_GNU_Power_ABI_FP].i == 0)
3627 out_attr[Tag_GNU_Power_ABI_FP].i = in_attr[Tag_GNU_Power_ABI_FP].i;
3628 else if (in_attr[Tag_GNU_Power_ABI_FP].i == 0)
3629 ;
3630 else if (out_attr[Tag_GNU_Power_ABI_FP].i == 1
3631 && in_attr[Tag_GNU_Power_ABI_FP].i == 2)
3632 _bfd_error_handler
3633 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3634 else if (out_attr[Tag_GNU_Power_ABI_FP].i == 2
3635 && in_attr[Tag_GNU_Power_ABI_FP].i == 1)
3636 _bfd_error_handler
3637 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3638 else if (in_attr[Tag_GNU_Power_ABI_FP].i > 2)
3639 _bfd_error_handler
3640 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3641 in_attr[Tag_GNU_Power_ABI_FP].i);
3642 else
3643 _bfd_error_handler
3644 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3645 out_attr[Tag_GNU_Power_ABI_FP].i);
3646 }
3647
3648 /* Merge Tag_compatibility attributes and any common GNU ones. */
3649 _bfd_elf_merge_object_attributes (ibfd, obfd);
3650
3651 return TRUE;
3652 }
3653
3654 /* Merge backend specific data from an object file to the output
3655 object file when linking. */
3656
3657 static bfd_boolean
3658 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3659 {
3660 flagword old_flags;
3661 flagword new_flags;
3662 bfd_boolean error;
3663
3664 if (!is_ppc_elf_target (ibfd->xvec)
3665 || !is_ppc_elf_target (obfd->xvec))
3666 return TRUE;
3667
3668 /* Check if we have the same endianess. */
3669 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3670 return FALSE;
3671
3672 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3673 return FALSE;
3674
3675 new_flags = elf_elfheader (ibfd)->e_flags;
3676 old_flags = elf_elfheader (obfd)->e_flags;
3677 if (!elf_flags_init (obfd))
3678 {
3679 /* First call, no flags set. */
3680 elf_flags_init (obfd) = TRUE;
3681 elf_elfheader (obfd)->e_flags = new_flags;
3682 }
3683
3684 /* Compatible flags are ok. */
3685 else if (new_flags == old_flags)
3686 ;
3687
3688 /* Incompatible flags. */
3689 else
3690 {
3691 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3692 to be linked with either. */
3693 error = FALSE;
3694 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3695 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3696 {
3697 error = TRUE;
3698 (*_bfd_error_handler)
3699 (_("%B: compiled with -mrelocatable and linked with "
3700 "modules compiled normally"), ibfd);
3701 }
3702 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3703 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3704 {
3705 error = TRUE;
3706 (*_bfd_error_handler)
3707 (_("%B: compiled normally and linked with "
3708 "modules compiled with -mrelocatable"), ibfd);
3709 }
3710
3711 /* The output is -mrelocatable-lib iff both the input files are. */
3712 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3713 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3714
3715 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3716 but each input file is either -mrelocatable or -mrelocatable-lib. */
3717 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3718 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3719 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3720 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3721
3722 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3723 any module uses it. */
3724 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3725
3726 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3727 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3728
3729 /* Warn about any other mismatches. */
3730 if (new_flags != old_flags)
3731 {
3732 error = TRUE;
3733 (*_bfd_error_handler)
3734 (_("%B: uses different e_flags (0x%lx) fields "
3735 "than previous modules (0x%lx)"),
3736 ibfd, (long) new_flags, (long) old_flags);
3737 }
3738
3739 if (error)
3740 {
3741 bfd_set_error (bfd_error_bad_value);
3742 return FALSE;
3743 }
3744 }
3745
3746 return TRUE;
3747 }
3748 \f
3749 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3750 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3751 int
3752 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3753 struct bfd_link_info *info,
3754 enum ppc_elf_plt_type plt_style,
3755 int emit_stub_syms)
3756 {
3757 struct ppc_elf_link_hash_table *htab;
3758 flagword flags;
3759
3760 htab = ppc_elf_hash_table (info);
3761
3762 if (htab->plt_type == PLT_UNSET)
3763 {
3764 if (plt_style == PLT_OLD)
3765 htab->plt_type = PLT_OLD;
3766 else
3767 {
3768 bfd *ibfd;
3769 enum ppc_elf_plt_type plt_type = plt_style;
3770
3771 /* Look through the reloc flags left by ppc_elf_check_relocs.
3772 Use the old style bss plt if a file makes plt calls
3773 without using the new relocs, and if ld isn't given
3774 --secure-plt and we never see REL16 relocs. */
3775 if (plt_type == PLT_UNSET)
3776 plt_type = PLT_OLD;
3777 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3778 if (is_ppc_elf_target (ibfd->xvec))
3779 {
3780 if (ppc_elf_tdata (ibfd)->has_rel16)
3781 plt_type = PLT_NEW;
3782 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3783 {
3784 plt_type = PLT_OLD;
3785 htab->old_bfd = ibfd;
3786 break;
3787 }
3788 }
3789 htab->plt_type = plt_type;
3790 }
3791 }
3792 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3793 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3794
3795 htab->emit_stub_syms = emit_stub_syms;
3796
3797 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3798
3799 if (htab->plt_type == PLT_NEW)
3800 {
3801 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3802 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3803
3804 /* The new PLT is a loaded section. */
3805 if (htab->plt != NULL
3806 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3807 return -1;
3808
3809 /* The new GOT is not executable. */
3810 if (htab->got != NULL
3811 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3812 return -1;
3813 }
3814 else
3815 {
3816 /* Stop an unused .glink section from affecting .text alignment. */
3817 if (htab->glink != NULL
3818 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3819 return -1;
3820 }
3821 return htab->plt_type == PLT_NEW;
3822 }
3823 \f
3824 /* Return the section that should be marked against GC for a given
3825 relocation. */
3826
3827 static asection *
3828 ppc_elf_gc_mark_hook (asection *sec,
3829 struct bfd_link_info *info,
3830 Elf_Internal_Rela *rel,
3831 struct elf_link_hash_entry *h,
3832 Elf_Internal_Sym *sym)
3833 {
3834 if (h != NULL)
3835 switch (ELF32_R_TYPE (rel->r_info))
3836 {
3837 case R_PPC_GNU_VTINHERIT:
3838 case R_PPC_GNU_VTENTRY:
3839 return NULL;
3840 }
3841
3842 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3843 }
3844
3845 /* Update the got, plt and dynamic reloc reference counts for the
3846 section being removed. */
3847
3848 static bfd_boolean
3849 ppc_elf_gc_sweep_hook (bfd *abfd,
3850 struct bfd_link_info *info,
3851 asection *sec,
3852 const Elf_Internal_Rela *relocs)
3853 {
3854 struct ppc_elf_link_hash_table *htab;
3855 Elf_Internal_Shdr *symtab_hdr;
3856 struct elf_link_hash_entry **sym_hashes;
3857 bfd_signed_vma *local_got_refcounts;
3858 const Elf_Internal_Rela *rel, *relend;
3859 asection *got2;
3860
3861 if ((sec->flags & SEC_ALLOC) == 0)
3862 return TRUE;
3863
3864 elf_section_data (sec)->local_dynrel = NULL;
3865
3866 htab = ppc_elf_hash_table (info);
3867 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3868 sym_hashes = elf_sym_hashes (abfd);
3869 local_got_refcounts = elf_local_got_refcounts (abfd);
3870 got2 = bfd_get_section_by_name (abfd, ".got2");
3871
3872 relend = relocs + sec->reloc_count;
3873 for (rel = relocs; rel < relend; rel++)
3874 {
3875 unsigned long r_symndx;
3876 enum elf_ppc_reloc_type r_type;
3877 struct elf_link_hash_entry *h = NULL;
3878
3879 r_symndx = ELF32_R_SYM (rel->r_info);
3880 if (r_symndx >= symtab_hdr->sh_info)
3881 {
3882 struct ppc_elf_dyn_relocs **pp, *p;
3883 struct ppc_elf_link_hash_entry *eh;
3884
3885 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3886 while (h->root.type == bfd_link_hash_indirect
3887 || h->root.type == bfd_link_hash_warning)
3888 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3889 eh = (struct ppc_elf_link_hash_entry *) h;
3890
3891 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3892 if (p->sec == sec)
3893 {
3894 /* Everything must go for SEC. */
3895 *pp = p->next;
3896 break;
3897 }
3898 }
3899
3900 r_type = ELF32_R_TYPE (rel->r_info);
3901 switch (r_type)
3902 {
3903 case R_PPC_GOT_TLSLD16:
3904 case R_PPC_GOT_TLSLD16_LO:
3905 case R_PPC_GOT_TLSLD16_HI:
3906 case R_PPC_GOT_TLSLD16_HA:
3907 htab->tlsld_got.refcount -= 1;
3908 /* Fall thru */
3909
3910 case R_PPC_GOT_TLSGD16:
3911 case R_PPC_GOT_TLSGD16_LO:
3912 case R_PPC_GOT_TLSGD16_HI:
3913 case R_PPC_GOT_TLSGD16_HA:
3914 case R_PPC_GOT_TPREL16:
3915 case R_PPC_GOT_TPREL16_LO:
3916 case R_PPC_GOT_TPREL16_HI:
3917 case R_PPC_GOT_TPREL16_HA:
3918 case R_PPC_GOT_DTPREL16:
3919 case R_PPC_GOT_DTPREL16_LO:
3920 case R_PPC_GOT_DTPREL16_HI:
3921 case R_PPC_GOT_DTPREL16_HA:
3922 case R_PPC_GOT16:
3923 case R_PPC_GOT16_LO:
3924 case R_PPC_GOT16_HI:
3925 case R_PPC_GOT16_HA:
3926 if (h != NULL)
3927 {
3928 if (h->got.refcount > 0)
3929 h->got.refcount--;
3930 }
3931 else if (local_got_refcounts != NULL)
3932 {
3933 if (local_got_refcounts[r_symndx] > 0)
3934 local_got_refcounts[r_symndx]--;
3935 }
3936 break;
3937
3938 case R_PPC_REL24:
3939 case R_PPC_REL14:
3940 case R_PPC_REL14_BRTAKEN:
3941 case R_PPC_REL14_BRNTAKEN:
3942 case R_PPC_REL32:
3943 if (h == NULL || h == htab->elf.hgot)
3944 break;
3945 /* Fall thru */
3946
3947 case R_PPC_ADDR32:
3948 case R_PPC_ADDR24:
3949 case R_PPC_ADDR16:
3950 case R_PPC_ADDR16_LO:
3951 case R_PPC_ADDR16_HI:
3952 case R_PPC_ADDR16_HA:
3953 case R_PPC_ADDR14:
3954 case R_PPC_ADDR14_BRTAKEN:
3955 case R_PPC_ADDR14_BRNTAKEN:
3956 case R_PPC_UADDR32:
3957 case R_PPC_UADDR16:
3958 if (info->shared)
3959 break;
3960
3961 case R_PPC_PLT32:
3962 case R_PPC_PLTREL24:
3963 case R_PPC_PLTREL32:
3964 case R_PPC_PLT16_LO:
3965 case R_PPC_PLT16_HI:
3966 case R_PPC_PLT16_HA:
3967 if (h != NULL)
3968 {
3969 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3970 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3971 if (ent->plt.refcount > 0)
3972 ent->plt.refcount -= 1;
3973 }
3974 break;
3975
3976 default:
3977 break;
3978 }
3979 }
3980 return TRUE;
3981 }
3982 \f
3983 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3984
3985 asection *
3986 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3987 {
3988 struct ppc_elf_link_hash_table *htab;
3989
3990 htab = ppc_elf_hash_table (info);
3991 if (htab->plt_type == PLT_NEW
3992 && htab->plt != NULL
3993 && htab->plt->output_section != NULL)
3994 {
3995 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3996 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3997 }
3998
3999 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4000 FALSE, FALSE, TRUE);
4001 return _bfd_elf_tls_setup (obfd, info);
4002 }
4003
4004 /* Run through all the TLS relocs looking for optimization
4005 opportunities. */
4006
4007 bfd_boolean
4008 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4009 struct bfd_link_info *info)
4010 {
4011 bfd *ibfd;
4012 asection *sec;
4013 struct ppc_elf_link_hash_table *htab;
4014
4015 if (info->relocatable || info->shared)
4016 return TRUE;
4017
4018 htab = ppc_elf_hash_table (info);
4019 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4020 {
4021 Elf_Internal_Sym *locsyms = NULL;
4022 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4023
4024 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4025 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4026 {
4027 Elf_Internal_Rela *relstart, *rel, *relend;
4028 int expecting_tls_get_addr;
4029
4030 /* Read the relocations. */
4031 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4032 info->keep_memory);
4033 if (relstart == NULL)
4034 return FALSE;
4035
4036 expecting_tls_get_addr = 0;
4037 relend = relstart + sec->reloc_count;
4038 for (rel = relstart; rel < relend; rel++)
4039 {
4040 enum elf_ppc_reloc_type r_type;
4041 unsigned long r_symndx;
4042 struct elf_link_hash_entry *h = NULL;
4043 char *tls_mask;
4044 char tls_set, tls_clear;
4045 bfd_boolean is_local;
4046
4047 r_symndx = ELF32_R_SYM (rel->r_info);
4048 if (r_symndx >= symtab_hdr->sh_info)
4049 {
4050 struct elf_link_hash_entry **sym_hashes;
4051
4052 sym_hashes = elf_sym_hashes (ibfd);
4053 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4054 while (h->root.type == bfd_link_hash_indirect
4055 || h->root.type == bfd_link_hash_warning)
4056 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4057 }
4058
4059 is_local = FALSE;
4060 if (h == NULL
4061 || !h->def_dynamic)
4062 is_local = TRUE;
4063
4064 r_type = ELF32_R_TYPE (rel->r_info);
4065 switch (r_type)
4066 {
4067 case R_PPC_GOT_TLSLD16:
4068 case R_PPC_GOT_TLSLD16_LO:
4069 case R_PPC_GOT_TLSLD16_HI:
4070 case R_PPC_GOT_TLSLD16_HA:
4071 /* These relocs should never be against a symbol
4072 defined in a shared lib. Leave them alone if
4073 that turns out to be the case. */
4074 expecting_tls_get_addr = 0;
4075 htab->tlsld_got.refcount -= 1;
4076 if (!is_local)
4077 continue;
4078
4079 /* LD -> LE */
4080 tls_set = 0;
4081 tls_clear = TLS_LD;
4082 expecting_tls_get_addr = 1;
4083 break;
4084
4085 case R_PPC_GOT_TLSGD16:
4086 case R_PPC_GOT_TLSGD16_LO:
4087 case R_PPC_GOT_TLSGD16_HI:
4088 case R_PPC_GOT_TLSGD16_HA:
4089 if (is_local)
4090 /* GD -> LE */
4091 tls_set = 0;
4092 else
4093 /* GD -> IE */
4094 tls_set = TLS_TLS | TLS_TPRELGD;
4095 tls_clear = TLS_GD;
4096 expecting_tls_get_addr = 1;
4097 break;
4098
4099 case R_PPC_GOT_TPREL16:
4100 case R_PPC_GOT_TPREL16_LO:
4101 case R_PPC_GOT_TPREL16_HI:
4102 case R_PPC_GOT_TPREL16_HA:
4103 expecting_tls_get_addr = 0;
4104 if (is_local)
4105 {
4106 /* IE -> LE */
4107 tls_set = 0;
4108 tls_clear = TLS_TPREL;
4109 break;
4110 }
4111 else
4112 continue;
4113
4114 case R_PPC_REL14:
4115 case R_PPC_REL14_BRTAKEN:
4116 case R_PPC_REL14_BRNTAKEN:
4117 case R_PPC_REL24:
4118 if (expecting_tls_get_addr
4119 && h != NULL
4120 && h == htab->tls_get_addr)
4121 {
4122 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
4123 if (ent != NULL && ent->plt.refcount > 0)
4124 ent->plt.refcount -= 1;
4125 }
4126 expecting_tls_get_addr = 0;
4127 continue;
4128
4129 default:
4130 expecting_tls_get_addr = 0;
4131 continue;
4132 }
4133
4134 if (h != NULL)
4135 {
4136 if (tls_set == 0)
4137 {
4138 /* We managed to get rid of a got entry. */
4139 if (h->got.refcount > 0)
4140 h->got.refcount -= 1;
4141 }
4142 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4143 }
4144 else
4145 {
4146 Elf_Internal_Sym *sym;
4147 bfd_signed_vma *lgot_refs;
4148 char *lgot_masks;
4149
4150 if (locsyms == NULL)
4151 {
4152 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4153 if (locsyms == NULL)
4154 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4155 symtab_hdr->sh_info,
4156 0, NULL, NULL, NULL);
4157 if (locsyms == NULL)
4158 {
4159 if (elf_section_data (sec)->relocs != relstart)
4160 free (relstart);
4161 return FALSE;
4162 }
4163 }
4164 sym = locsyms + r_symndx;
4165 lgot_refs = elf_local_got_refcounts (ibfd);
4166 if (lgot_refs == NULL)
4167 abort ();
4168 if (tls_set == 0)
4169 {
4170 /* We managed to get rid of a got entry. */
4171 if (lgot_refs[r_symndx] > 0)
4172 lgot_refs[r_symndx] -= 1;
4173 }
4174 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4175 tls_mask = &lgot_masks[r_symndx];
4176 }
4177
4178 *tls_mask |= tls_set;
4179 *tls_mask &= ~tls_clear;
4180 }
4181
4182 if (elf_section_data (sec)->relocs != relstart)
4183 free (relstart);
4184 }
4185
4186 if (locsyms != NULL
4187 && (symtab_hdr->contents != (unsigned char *) locsyms))
4188 {
4189 if (!info->keep_memory)
4190 free (locsyms);
4191 else
4192 symtab_hdr->contents = (unsigned char *) locsyms;
4193 }
4194 }
4195 return TRUE;
4196 }
4197 \f
4198 /* Adjust a symbol defined by a dynamic object and referenced by a
4199 regular object. The current definition is in some section of the
4200 dynamic object, but we're not including those sections. We have to
4201 change the definition to something the rest of the link can
4202 understand. */
4203
4204 static bfd_boolean
4205 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4206 struct elf_link_hash_entry *h)
4207 {
4208 struct ppc_elf_link_hash_table *htab;
4209 asection *s;
4210
4211 #ifdef DEBUG
4212 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4213 h->root.root.string);
4214 #endif
4215
4216 /* Make sure we know what is going on here. */
4217 htab = ppc_elf_hash_table (info);
4218 BFD_ASSERT (htab->elf.dynobj != NULL
4219 && (h->needs_plt
4220 || h->u.weakdef != NULL
4221 || (h->def_dynamic
4222 && h->ref_regular
4223 && !h->def_regular)));
4224
4225 /* Deal with function syms. */
4226 if (h->type == STT_FUNC
4227 || h->needs_plt)
4228 {
4229 /* Clear procedure linkage table information for any symbol that
4230 won't need a .plt entry. */
4231 struct plt_entry *ent;
4232 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4233 if (ent->plt.refcount > 0)
4234 break;
4235 if (ent == NULL
4236 || SYMBOL_CALLS_LOCAL (info, h)
4237 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4238 && h->root.type == bfd_link_hash_undefweak))
4239 {
4240 /* A PLT entry is not required/allowed when:
4241
4242 1. We are not using ld.so; because then the PLT entry
4243 can't be set up, so we can't use one. In this case,
4244 ppc_elf_adjust_dynamic_symbol won't even be called.
4245
4246 2. GC has rendered the entry unused.
4247
4248 3. We know for certain that a call to this symbol
4249 will go to this object, or will remain undefined. */
4250 h->plt.plist = NULL;
4251 h->needs_plt = 0;
4252 }
4253 return TRUE;
4254 }
4255 else
4256 h->plt.plist = NULL;
4257
4258 /* If this is a weak symbol, and there is a real definition, the
4259 processor independent code will have arranged for us to see the
4260 real definition first, and we can just use the same value. */
4261 if (h->u.weakdef != NULL)
4262 {
4263 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4264 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4265 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4266 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4267 if (ELIMINATE_COPY_RELOCS)
4268 h->non_got_ref = h->u.weakdef->non_got_ref;
4269 return TRUE;
4270 }
4271
4272 /* This is a reference to a symbol defined by a dynamic object which
4273 is not a function. */
4274
4275 /* If we are creating a shared library, we must presume that the
4276 only references to the symbol are via the global offset table.
4277 For such cases we need not do anything here; the relocations will
4278 be handled correctly by relocate_section. */
4279 if (info->shared)
4280 return TRUE;
4281
4282 /* If there are no references to this symbol that do not use the
4283 GOT, we don't need to generate a copy reloc. */
4284 if (!h->non_got_ref)
4285 return TRUE;
4286
4287 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4288 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4289 do this if there are any small data relocations. */
4290 if (ELIMINATE_COPY_RELOCS
4291 && !ppc_elf_hash_entry (h)->has_sda_refs)
4292 {
4293 struct ppc_elf_dyn_relocs *p;
4294 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4295 {
4296 s = p->sec->output_section;
4297 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4298 break;
4299 }
4300
4301 if (p == NULL)
4302 {
4303 h->non_got_ref = 0;
4304 return TRUE;
4305 }
4306 }
4307
4308 if (h->size == 0)
4309 {
4310 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4311 h->root.root.string);
4312 return TRUE;
4313 }
4314
4315 /* We must allocate the symbol in our .dynbss section, which will
4316 become part of the .bss section of the executable. There will be
4317 an entry for this symbol in the .dynsym section. The dynamic
4318 object will contain position independent code, so all references
4319 from the dynamic object to this symbol will go through the global
4320 offset table. The dynamic linker will use the .dynsym entry to
4321 determine the address it must put in the global offset table, so
4322 both the dynamic object and the regular object will refer to the
4323 same memory location for the variable.
4324
4325 Of course, if the symbol is referenced using SDAREL relocs, we
4326 must instead allocate it in .sbss. */
4327
4328 if (ppc_elf_hash_entry (h)->has_sda_refs)
4329 s = htab->dynsbss;
4330 else
4331 s = htab->dynbss;
4332 BFD_ASSERT (s != NULL);
4333
4334 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4335 copy the initial value out of the dynamic object and into the
4336 runtime process image. We need to remember the offset into the
4337 .rela.bss section we are going to use. */
4338 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4339 {
4340 asection *srel;
4341
4342 if (ppc_elf_hash_entry (h)->has_sda_refs)
4343 srel = htab->relsbss;
4344 else
4345 srel = htab->relbss;
4346 BFD_ASSERT (srel != NULL);
4347 srel->size += sizeof (Elf32_External_Rela);
4348 h->needs_copy = 1;
4349 }
4350
4351 return _bfd_elf_adjust_dynamic_copy (h, s);
4352 }
4353 \f
4354 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4355 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4356 specifying the addend on the plt relocation. For -fpic code, the sym
4357 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4358 xxxxxxxx.got2.plt_pic32.<callee>. */
4359
4360 static bfd_boolean
4361 add_stub_sym (struct plt_entry *ent,
4362 struct elf_link_hash_entry *h,
4363 struct bfd_link_info *info)
4364 {
4365 struct elf_link_hash_entry *sh;
4366 size_t len1, len2, len3;
4367 char *name;
4368 const char *stub;
4369 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4370
4371 if (info->shared || info->pie)
4372 stub = ".plt_pic32.";
4373 else
4374 stub = ".plt_call32.";
4375
4376 len1 = strlen (h->root.root.string);
4377 len2 = strlen (stub);
4378 len3 = 0;
4379 if (ent->sec)
4380 len3 = strlen (ent->sec->name);
4381 name = bfd_malloc (len1 + len2 + len3 + 9);
4382 if (name == NULL)
4383 return FALSE;
4384 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4385 if (ent->sec)
4386 memcpy (name + 8, ent->sec->name, len3);
4387 memcpy (name + 8 + len3, stub, len2);
4388 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4389 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4390 if (sh == NULL)
4391 return FALSE;
4392 if (sh->root.type == bfd_link_hash_new)
4393 {
4394 sh->root.type = bfd_link_hash_defined;
4395 sh->root.u.def.section = htab->glink;
4396 sh->root.u.def.value = ent->glink_offset;
4397 sh->ref_regular = 1;
4398 sh->def_regular = 1;
4399 sh->ref_regular_nonweak = 1;
4400 sh->forced_local = 1;
4401 sh->non_elf = 0;
4402 }
4403 return TRUE;
4404 }
4405
4406 /* Allocate NEED contiguous space in .got, and return the offset.
4407 Handles allocation of the got header when crossing 32k. */
4408
4409 static bfd_vma
4410 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4411 {
4412 bfd_vma where;
4413 unsigned int max_before_header;
4414
4415 if (htab->plt_type == PLT_VXWORKS)
4416 {
4417 where = htab->got->size;
4418 htab->got->size += need;
4419 }
4420 else
4421 {
4422 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4423 if (need <= htab->got_gap)
4424 {
4425 where = max_before_header - htab->got_gap;
4426 htab->got_gap -= need;
4427 }
4428 else
4429 {
4430 if (htab->got->size + need > max_before_header
4431 && htab->got->size <= max_before_header)
4432 {
4433 htab->got_gap = max_before_header - htab->got->size;
4434 htab->got->size = max_before_header + htab->got_header_size;
4435 }
4436 where = htab->got->size;
4437 htab->got->size += need;
4438 }
4439 }
4440 return where;
4441 }
4442
4443 /* Allocate space in associated reloc sections for dynamic relocs. */
4444
4445 static bfd_boolean
4446 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4447 {
4448 struct bfd_link_info *info = inf;
4449 struct ppc_elf_link_hash_entry *eh;
4450 struct ppc_elf_link_hash_table *htab;
4451 struct ppc_elf_dyn_relocs *p;
4452
4453 if (h->root.type == bfd_link_hash_indirect)
4454 return TRUE;
4455
4456 if (h->root.type == bfd_link_hash_warning)
4457 /* When warning symbols are created, they **replace** the "real"
4458 entry in the hash table, thus we never get to see the real
4459 symbol in a hash traversal. So look at it now. */
4460 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4461
4462 htab = ppc_elf_hash_table (info);
4463 if (htab->elf.dynamic_sections_created)
4464 {
4465 struct plt_entry *ent;
4466 bfd_boolean doneone = FALSE;
4467 bfd_vma plt_offset = 0, glink_offset = 0;
4468
4469 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4470 if (ent->plt.refcount > 0)
4471 {
4472 /* Make sure this symbol is output as a dynamic symbol. */
4473 if (h->dynindx == -1
4474 && !h->forced_local)
4475 {
4476 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4477 return FALSE;
4478 }
4479
4480 if (info->shared
4481 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4482 {
4483 asection *s = htab->plt;
4484
4485 if (htab->plt_type == PLT_NEW)
4486 {
4487 if (!doneone)
4488 {
4489 plt_offset = s->size;
4490 s->size += 4;
4491 }
4492 ent->plt.offset = plt_offset;
4493
4494 s = htab->glink;
4495 if (!doneone || info->shared || info->pie)
4496 {
4497 glink_offset = s->size;
4498 s->size += GLINK_ENTRY_SIZE;
4499 }
4500 if (!doneone
4501 && !info->shared
4502 && !h->def_regular)
4503 {
4504 h->root.u.def.section = s;
4505 h->root.u.def.value = glink_offset;
4506 }
4507 ent->glink_offset = glink_offset;
4508
4509 if (htab->emit_stub_syms
4510 && !add_stub_sym (ent, h, info))
4511 return FALSE;
4512 }
4513 else
4514 {
4515 if (!doneone)
4516 {
4517 /* If this is the first .plt entry, make room
4518 for the special first entry. */
4519 if (s->size == 0)
4520 s->size += htab->plt_initial_entry_size;
4521
4522 /* The PowerPC PLT is actually composed of two
4523 parts, the first part is 2 words (for a load
4524 and a jump), and then there is a remaining
4525 word available at the end. */
4526 plt_offset = (htab->plt_initial_entry_size
4527 + (htab->plt_slot_size
4528 * ((s->size
4529 - htab->plt_initial_entry_size)
4530 / htab->plt_entry_size)));
4531
4532 /* If this symbol is not defined in a regular
4533 file, and we are not generating a shared
4534 library, then set the symbol to this location
4535 in the .plt. This is required to make
4536 function pointers compare as equal between
4537 the normal executable and the shared library. */
4538 if (! info->shared
4539 && !h->def_regular)
4540 {
4541 h->root.u.def.section = s;
4542 h->root.u.def.value = plt_offset;
4543 }
4544
4545 /* Make room for this entry. */
4546 s->size += htab->plt_entry_size;
4547 /* After the 8192nd entry, room for two entries
4548 is allocated. */
4549 if (htab->plt_type == PLT_OLD
4550 && (s->size - htab->plt_initial_entry_size)
4551 / htab->plt_entry_size
4552 > PLT_NUM_SINGLE_ENTRIES)
4553 s->size += htab->plt_entry_size;
4554 }
4555 ent->plt.offset = plt_offset;
4556 }
4557
4558 /* We also need to make an entry in the .rela.plt section. */
4559 if (!doneone)
4560 {
4561 htab->relplt->size += sizeof (Elf32_External_Rela);
4562
4563 if (htab->plt_type == PLT_VXWORKS)
4564 {
4565 /* Allocate space for the unloaded relocations. */
4566 if (!info->shared)
4567 {
4568 if (ent->plt.offset
4569 == (bfd_vma) htab->plt_initial_entry_size)
4570 {
4571 htab->srelplt2->size
4572 += sizeof (Elf32_External_Rela)
4573 * VXWORKS_PLTRESOLVE_RELOCS;
4574 }
4575
4576 htab->srelplt2->size
4577 += sizeof (Elf32_External_Rela)
4578 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4579 }
4580
4581 /* Every PLT entry has an associated GOT entry in
4582 .got.plt. */
4583 htab->sgotplt->size += 4;
4584 }
4585 doneone = TRUE;
4586 }
4587 }
4588 else
4589 ent->plt.offset = (bfd_vma) -1;
4590 }
4591 else
4592 ent->plt.offset = (bfd_vma) -1;
4593
4594 if (!doneone)
4595 {
4596 h->plt.plist = NULL;
4597 h->needs_plt = 0;
4598 }
4599 }
4600 else
4601 {
4602 h->plt.plist = NULL;
4603 h->needs_plt = 0;
4604 }
4605
4606 eh = (struct ppc_elf_link_hash_entry *) h;
4607 if (eh->elf.got.refcount > 0)
4608 {
4609 /* Make sure this symbol is output as a dynamic symbol. */
4610 if (eh->elf.dynindx == -1
4611 && !eh->elf.forced_local)
4612 {
4613 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4614 return FALSE;
4615 }
4616
4617 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4618 && !eh->elf.def_dynamic)
4619 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4620 eh->elf.got.offset = (bfd_vma) -1;
4621 else
4622 {
4623 bfd_boolean dyn;
4624 unsigned int need = 0;
4625 if ((eh->tls_mask & TLS_TLS) != 0)
4626 {
4627 if ((eh->tls_mask & TLS_LD) != 0)
4628 need += 8;
4629 if ((eh->tls_mask & TLS_GD) != 0)
4630 need += 8;
4631 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4632 need += 4;
4633 if ((eh->tls_mask & TLS_DTPREL) != 0)
4634 need += 4;
4635 }
4636 else
4637 need += 4;
4638 eh->elf.got.offset = allocate_got (htab, need);
4639 dyn = htab->elf.dynamic_sections_created;
4640 if ((info->shared
4641 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4642 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4643 || eh->elf.root.type != bfd_link_hash_undefweak))
4644 {
4645 /* All the entries we allocated need relocs.
4646 Except LD only needs one. */
4647 if ((eh->tls_mask & TLS_LD) != 0)
4648 need -= 4;
4649 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4650 }
4651 }
4652 }
4653 else
4654 eh->elf.got.offset = (bfd_vma) -1;
4655
4656 if (eh->dyn_relocs == NULL)
4657 return TRUE;
4658
4659 /* In the shared -Bsymbolic case, discard space allocated for
4660 dynamic pc-relative relocs against symbols which turn out to be
4661 defined in regular objects. For the normal shared case, discard
4662 space for relocs that have become local due to symbol visibility
4663 changes. */
4664
4665 if (info->shared)
4666 {
4667 /* Relocs that use pc_count are those that appear on a call insn,
4668 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4669 generated via assembly. We want calls to protected symbols to
4670 resolve directly to the function rather than going via the plt.
4671 If people want function pointer comparisons to work as expected
4672 then they should avoid writing weird assembly. */
4673 if (SYMBOL_CALLS_LOCAL (info, h))
4674 {
4675 struct ppc_elf_dyn_relocs **pp;
4676
4677 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4678 {
4679 p->count -= p->pc_count;
4680 p->pc_count = 0;
4681 if (p->count == 0)
4682 *pp = p->next;
4683 else
4684 pp = &p->next;
4685 }
4686 }
4687
4688 /* Also discard relocs on undefined weak syms with non-default
4689 visibility. */
4690 if (eh->dyn_relocs != NULL
4691 && h->root.type == bfd_link_hash_undefweak)
4692 {
4693 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4694 eh->dyn_relocs = NULL;
4695
4696 /* Make sure undefined weak symbols are output as a dynamic
4697 symbol in PIEs. */
4698 else if (h->dynindx == -1
4699 && !h->forced_local)
4700 {
4701 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4702 return FALSE;
4703 }
4704 }
4705 }
4706 else if (ELIMINATE_COPY_RELOCS)
4707 {
4708 /* For the non-shared case, discard space for relocs against
4709 symbols which turn out to need copy relocs or are not
4710 dynamic. */
4711
4712 if (!h->non_got_ref
4713 && h->def_dynamic
4714 && !h->def_regular)
4715 {
4716 /* Make sure this symbol is output as a dynamic symbol.
4717 Undefined weak syms won't yet be marked as dynamic. */
4718 if (h->dynindx == -1
4719 && !h->forced_local)
4720 {
4721 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4722 return FALSE;
4723 }
4724
4725 /* If that succeeded, we know we'll be keeping all the
4726 relocs. */
4727 if (h->dynindx != -1)
4728 goto keep;
4729 }
4730
4731 eh->dyn_relocs = NULL;
4732
4733 keep: ;
4734 }
4735
4736 /* Finally, allocate space. */
4737 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4738 {
4739 asection *sreloc = elf_section_data (p->sec)->sreloc;
4740 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4741 }
4742
4743 return TRUE;
4744 }
4745
4746 /* Find any dynamic relocs that apply to read-only sections. */
4747
4748 static bfd_boolean
4749 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4750 {
4751 struct ppc_elf_dyn_relocs *p;
4752
4753 if (h->root.type == bfd_link_hash_indirect)
4754 return TRUE;
4755
4756 if (h->root.type == bfd_link_hash_warning)
4757 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4758
4759 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4760 {
4761 asection *s = p->sec->output_section;
4762
4763 if (s != NULL
4764 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4765 == (SEC_READONLY | SEC_ALLOC)))
4766 {
4767 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4768
4769 /* Not an error, just cut short the traversal. */
4770 return FALSE;
4771 }
4772 }
4773 return TRUE;
4774 }
4775
4776 /* Set the sizes of the dynamic sections. */
4777
4778 static bfd_boolean
4779 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4780 struct bfd_link_info *info)
4781 {
4782 struct ppc_elf_link_hash_table *htab;
4783 asection *s;
4784 bfd_boolean relocs;
4785 bfd *ibfd;
4786
4787 #ifdef DEBUG
4788 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4789 #endif
4790
4791 htab = ppc_elf_hash_table (info);
4792 BFD_ASSERT (htab->elf.dynobj != NULL);
4793
4794 if (elf_hash_table (info)->dynamic_sections_created)
4795 {
4796 /* Set the contents of the .interp section to the interpreter. */
4797 if (info->executable)
4798 {
4799 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4800 BFD_ASSERT (s != NULL);
4801 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4802 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4803 }
4804 }
4805
4806 if (htab->plt_type == PLT_OLD)
4807 htab->got_header_size = 16;
4808 else if (htab->plt_type == PLT_NEW)
4809 htab->got_header_size = 12;
4810
4811 /* Set up .got offsets for local syms, and space for local dynamic
4812 relocs. */
4813 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4814 {
4815 bfd_signed_vma *local_got;
4816 bfd_signed_vma *end_local_got;
4817 char *lgot_masks;
4818 bfd_size_type locsymcount;
4819 Elf_Internal_Shdr *symtab_hdr;
4820
4821 if (!is_ppc_elf_target (ibfd->xvec))
4822 continue;
4823
4824 for (s = ibfd->sections; s != NULL; s = s->next)
4825 {
4826 struct ppc_elf_dyn_relocs *p;
4827
4828 for (p = ((struct ppc_elf_dyn_relocs *)
4829 elf_section_data (s)->local_dynrel);
4830 p != NULL;
4831 p = p->next)
4832 {
4833 if (!bfd_is_abs_section (p->sec)
4834 && bfd_is_abs_section (p->sec->output_section))
4835 {
4836 /* Input section has been discarded, either because
4837 it is a copy of a linkonce section or due to
4838 linker script /DISCARD/, so we'll be discarding
4839 the relocs too. */
4840 }
4841 else if (p->count != 0)
4842 {
4843 elf_section_data (p->sec)->sreloc->size
4844 += p->count * sizeof (Elf32_External_Rela);
4845 if ((p->sec->output_section->flags
4846 & (SEC_READONLY | SEC_ALLOC))
4847 == (SEC_READONLY | SEC_ALLOC))
4848 info->flags |= DF_TEXTREL;
4849 }
4850 }
4851 }
4852
4853 local_got = elf_local_got_refcounts (ibfd);
4854 if (!local_got)
4855 continue;
4856
4857 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4858 locsymcount = symtab_hdr->sh_info;
4859 end_local_got = local_got + locsymcount;
4860 lgot_masks = (char *) end_local_got;
4861 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4862 if (*local_got > 0)
4863 {
4864 if (*lgot_masks == (TLS_TLS | TLS_LD))
4865 {
4866 /* If just an LD reloc, we'll just use
4867 htab->tlsld_got.offset. */
4868 htab->tlsld_got.refcount += 1;
4869 *local_got = (bfd_vma) -1;
4870 }
4871 else
4872 {
4873 unsigned int need = 0;
4874 if ((*lgot_masks & TLS_TLS) != 0)
4875 {
4876 if ((*lgot_masks & TLS_GD) != 0)
4877 need += 8;
4878 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4879 need += 4;
4880 if ((*lgot_masks & TLS_DTPREL) != 0)
4881 need += 4;
4882 }
4883 else
4884 need += 4;
4885 *local_got = allocate_got (htab, need);
4886 if (info->shared)
4887 htab->relgot->size += (need
4888 * (sizeof (Elf32_External_Rela) / 4));
4889 }
4890 }
4891 else
4892 *local_got = (bfd_vma) -1;
4893 }
4894
4895 if (htab->tlsld_got.refcount > 0)
4896 {
4897 htab->tlsld_got.offset = allocate_got (htab, 8);
4898 if (info->shared)
4899 htab->relgot->size += sizeof (Elf32_External_Rela);
4900 }
4901 else
4902 htab->tlsld_got.offset = (bfd_vma) -1;
4903
4904 /* Allocate space for global sym dynamic relocs. */
4905 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4906
4907 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4908 {
4909 unsigned int g_o_t = 32768;
4910
4911 /* If we haven't allocated the header, do so now. When we get here,
4912 for old plt/got the got size will be 0 to 32764 (not allocated),
4913 or 32780 to 65536 (header allocated). For new plt/got, the
4914 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4915 if (htab->got->size <= 32768)
4916 {
4917 g_o_t = htab->got->size;
4918 if (htab->plt_type == PLT_OLD)
4919 g_o_t += 4;
4920 htab->got->size += htab->got_header_size;
4921 }
4922
4923 htab->elf.hgot->root.u.def.value = g_o_t;
4924 }
4925
4926 if (htab->glink != NULL && htab->glink->size != 0)
4927 {
4928 htab->glink_pltresolve = htab->glink->size;
4929 /* Space for the branch table. */
4930 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4931 /* Pad out to align the start of PLTresolve. */
4932 htab->glink->size += -htab->glink->size & 15;
4933 htab->glink->size += GLINK_PLTRESOLVE;
4934
4935 if (htab->emit_stub_syms)
4936 {
4937 struct elf_link_hash_entry *sh;
4938 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4939 TRUE, FALSE, FALSE);
4940 if (sh == NULL)
4941 return FALSE;
4942 if (sh->root.type == bfd_link_hash_new)
4943 {
4944 sh->root.type = bfd_link_hash_defined;
4945 sh->root.u.def.section = htab->glink;
4946 sh->root.u.def.value = htab->glink_pltresolve;
4947 sh->ref_regular = 1;
4948 sh->def_regular = 1;
4949 sh->ref_regular_nonweak = 1;
4950 sh->forced_local = 1;
4951 sh->non_elf = 0;
4952 }
4953 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4954 TRUE, FALSE, FALSE);
4955 if (sh == NULL)
4956 return FALSE;
4957 if (sh->root.type == bfd_link_hash_new)
4958 {
4959 sh->root.type = bfd_link_hash_defined;
4960 sh->root.u.def.section = htab->glink;
4961 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4962 sh->ref_regular = 1;
4963 sh->def_regular = 1;
4964 sh->ref_regular_nonweak = 1;
4965 sh->forced_local = 1;
4966 sh->non_elf = 0;
4967 }
4968 }
4969 }
4970
4971 /* We've now determined the sizes of the various dynamic sections.
4972 Allocate memory for them. */
4973 relocs = FALSE;
4974 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4975 {
4976 bfd_boolean strip_section = TRUE;
4977
4978 if ((s->flags & SEC_LINKER_CREATED) == 0)
4979 continue;
4980
4981 if (s == htab->plt
4982 || s == htab->glink
4983 || s == htab->got
4984 || s == htab->sgotplt
4985 || s == htab->sbss
4986 || s == htab->dynbss
4987 || s == htab->dynsbss)
4988 {
4989 /* We'd like to strip these sections if they aren't needed, but if
4990 we've exported dynamic symbols from them we must leave them.
4991 It's too late to tell BFD to get rid of the symbols. */
4992 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4993 strip_section = FALSE;
4994 /* Strip this section if we don't need it; see the
4995 comment below. */
4996 }
4997 else if (s == htab->sdata[0].section
4998 || s == htab->sdata[1].section)
4999 {
5000 /* Strip these too. */
5001 }
5002 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5003 {
5004 if (s->size != 0)
5005 {
5006 /* Remember whether there are any relocation sections. */
5007 relocs = TRUE;
5008
5009 /* We use the reloc_count field as a counter if we need
5010 to copy relocs into the output file. */
5011 s->reloc_count = 0;
5012 }
5013 }
5014 else
5015 {
5016 /* It's not one of our sections, so don't allocate space. */
5017 continue;
5018 }
5019
5020 if (s->size == 0 && strip_section)
5021 {
5022 /* If we don't need this section, strip it from the
5023 output file. This is mostly to handle .rela.bss and
5024 .rela.plt. We must create both sections in
5025 create_dynamic_sections, because they must be created
5026 before the linker maps input sections to output
5027 sections. The linker does that before
5028 adjust_dynamic_symbol is called, and it is that
5029 function which decides whether anything needs to go
5030 into these sections. */
5031 s->flags |= SEC_EXCLUDE;
5032 continue;
5033 }
5034
5035 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5036 continue;
5037
5038 /* Allocate memory for the section contents. */
5039 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5040 if (s->contents == NULL)
5041 return FALSE;
5042 }
5043
5044 if (htab->elf.dynamic_sections_created)
5045 {
5046 /* Add some entries to the .dynamic section. We fill in the
5047 values later, in ppc_elf_finish_dynamic_sections, but we
5048 must add the entries now so that we get the correct size for
5049 the .dynamic section. The DT_DEBUG entry is filled in by the
5050 dynamic linker and used by the debugger. */
5051 #define add_dynamic_entry(TAG, VAL) \
5052 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5053
5054 if (info->executable)
5055 {
5056 if (!add_dynamic_entry (DT_DEBUG, 0))
5057 return FALSE;
5058 }
5059
5060 if (htab->plt != NULL && htab->plt->size != 0)
5061 {
5062 if (!add_dynamic_entry (DT_PLTGOT, 0)
5063 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5064 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5065 || !add_dynamic_entry (DT_JMPREL, 0))
5066 return FALSE;
5067 }
5068
5069 if (htab->glink != NULL && htab->glink->size != 0)
5070 {
5071 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5072 return FALSE;
5073 }
5074
5075 if (relocs)
5076 {
5077 if (!add_dynamic_entry (DT_RELA, 0)
5078 || !add_dynamic_entry (DT_RELASZ, 0)
5079 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5080 return FALSE;
5081 }
5082
5083 /* If any dynamic relocs apply to a read-only section, then we
5084 need a DT_TEXTREL entry. */
5085 if ((info->flags & DF_TEXTREL) == 0)
5086 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
5087 info);
5088
5089 if ((info->flags & DF_TEXTREL) != 0)
5090 {
5091 if (!add_dynamic_entry (DT_TEXTREL, 0))
5092 return FALSE;
5093 }
5094 }
5095 #undef add_dynamic_entry
5096
5097 return TRUE;
5098 }
5099 \f
5100 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5101
5102 static const int shared_stub_entry[] =
5103 {
5104 0x7c0802a6, /* mflr 0 */
5105 0x429f0005, /* bcl 20, 31, .Lxxx */
5106 0x7d6802a6, /* mflr 11 */
5107 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5108 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5109 0x7c0803a6, /* mtlr 0 */
5110 0x7d6903a6, /* mtctr 11 */
5111 0x4e800420, /* bctr */
5112 };
5113
5114 static const int stub_entry[] =
5115 {
5116 0x3d600000, /* lis 11,xxx@ha */
5117 0x396b0000, /* addi 11,11,xxx@l */
5118 0x7d6903a6, /* mtctr 11 */
5119 0x4e800420, /* bctr */
5120 };
5121
5122 static bfd_boolean
5123 ppc_elf_relax_section (bfd *abfd,
5124 asection *isec,
5125 struct bfd_link_info *link_info,
5126 bfd_boolean *again)
5127 {
5128 struct one_fixup
5129 {
5130 struct one_fixup *next;
5131 asection *tsec;
5132 bfd_vma toff;
5133 bfd_vma trampoff;
5134 };
5135
5136 Elf_Internal_Shdr *symtab_hdr;
5137 bfd_byte *contents = NULL;
5138 Elf_Internal_Sym *isymbuf = NULL;
5139 Elf_Internal_Rela *internal_relocs = NULL;
5140 Elf_Internal_Rela *irel, *irelend;
5141 struct one_fixup *fixups = NULL;
5142 bfd_boolean changed;
5143 struct ppc_elf_link_hash_table *htab;
5144 bfd_size_type trampoff;
5145 asection *got2;
5146
5147 *again = FALSE;
5148
5149 /* Nothing to do if there are no relocations, and no need to do
5150 anything with non-alloc sections. */
5151 if ((isec->flags & SEC_ALLOC) == 0
5152 || (isec->flags & SEC_RELOC) == 0
5153 || isec->reloc_count == 0)
5154 return TRUE;
5155
5156 trampoff = (isec->size + 3) & (bfd_vma) -4;
5157 /* Space for a branch around any trampolines. */
5158 trampoff += 4;
5159
5160 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5161
5162 /* Get a copy of the native relocations. */
5163 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5164 link_info->keep_memory);
5165 if (internal_relocs == NULL)
5166 goto error_return;
5167
5168 htab = ppc_elf_hash_table (link_info);
5169 got2 = bfd_get_section_by_name (abfd, ".got2");
5170
5171 irelend = internal_relocs + isec->reloc_count;
5172 for (irel = internal_relocs; irel < irelend; irel++)
5173 {
5174 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5175 bfd_vma symaddr, reladdr, toff, roff;
5176 asection *tsec;
5177 struct one_fixup *f;
5178 size_t insn_offset = 0;
5179 bfd_vma max_branch_offset, val;
5180 bfd_byte *hit_addr;
5181 unsigned long t0;
5182 unsigned char sym_type;
5183
5184 switch (r_type)
5185 {
5186 case R_PPC_REL24:
5187 case R_PPC_LOCAL24PC:
5188 case R_PPC_PLTREL24:
5189 max_branch_offset = 1 << 25;
5190 break;
5191
5192 case R_PPC_REL14:
5193 case R_PPC_REL14_BRTAKEN:
5194 case R_PPC_REL14_BRNTAKEN:
5195 max_branch_offset = 1 << 15;
5196 break;
5197
5198 default:
5199 continue;
5200 }
5201
5202 /* Get the value of the symbol referred to by the reloc. */
5203 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5204 {
5205 /* A local symbol. */
5206 Elf_Internal_Sym *isym;
5207
5208 /* Read this BFD's local symbols. */
5209 if (isymbuf == NULL)
5210 {
5211 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5212 if (isymbuf == NULL)
5213 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5214 symtab_hdr->sh_info, 0,
5215 NULL, NULL, NULL);
5216 if (isymbuf == 0)
5217 goto error_return;
5218 }
5219 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5220 if (isym->st_shndx == SHN_UNDEF)
5221 continue; /* We can't do anything with undefined symbols. */
5222 else if (isym->st_shndx == SHN_ABS)
5223 tsec = bfd_abs_section_ptr;
5224 else if (isym->st_shndx == SHN_COMMON)
5225 tsec = bfd_com_section_ptr;
5226 else
5227 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5228
5229 toff = isym->st_value;
5230 sym_type = ELF_ST_TYPE (isym->st_info);
5231 }
5232 else
5233 {
5234 /* Global symbol handling. */
5235 unsigned long indx;
5236 struct elf_link_hash_entry *h;
5237
5238 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5239 h = elf_sym_hashes (abfd)[indx];
5240
5241 while (h->root.type == bfd_link_hash_indirect
5242 || h->root.type == bfd_link_hash_warning)
5243 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5244
5245 tsec = NULL;
5246 toff = 0;
5247 if (r_type == R_PPC_PLTREL24
5248 && htab->plt != NULL)
5249 {
5250 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5251
5252 if (ent != NULL)
5253 {
5254 if (htab->plt_type == PLT_NEW)
5255 {
5256 tsec = htab->glink;
5257 toff = ent->glink_offset;
5258 }
5259 else
5260 {
5261 tsec = htab->plt;
5262 toff = ent->plt.offset;
5263 }
5264 }
5265 }
5266 if (tsec != NULL)
5267 ;
5268 else if (h->root.type == bfd_link_hash_defined
5269 || h->root.type == bfd_link_hash_defweak)
5270 {
5271 tsec = h->root.u.def.section;
5272 toff = h->root.u.def.value;
5273 }
5274 else
5275 continue;
5276
5277 sym_type = h->type;
5278 }
5279
5280 /* If the branch and target are in the same section, you have
5281 no hope of adding stubs. We'll error out later should the
5282 branch overflow. */
5283 if (tsec == isec)
5284 continue;
5285
5286 /* There probably isn't any reason to handle symbols in
5287 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5288 attribute for a code section, and we are only looking at
5289 branches. However, implement it correctly here as a
5290 reference for other target relax_section functions. */
5291 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5292 {
5293 /* At this stage in linking, no SEC_MERGE symbol has been
5294 adjusted, so all references to such symbols need to be
5295 passed through _bfd_merged_section_offset. (Later, in
5296 relocate_section, all SEC_MERGE symbols *except* for
5297 section symbols have been adjusted.)
5298
5299 gas may reduce relocations against symbols in SEC_MERGE
5300 sections to a relocation against the section symbol when
5301 the original addend was zero. When the reloc is against
5302 a section symbol we should include the addend in the
5303 offset passed to _bfd_merged_section_offset, since the
5304 location of interest is the original symbol. On the
5305 other hand, an access to "sym+addend" where "sym" is not
5306 a section symbol should not include the addend; Such an
5307 access is presumed to be an offset from "sym"; The
5308 location of interest is just "sym". */
5309 if (sym_type == STT_SECTION)
5310 toff += irel->r_addend;
5311
5312 toff = _bfd_merged_section_offset (abfd, &tsec,
5313 elf_section_data (tsec)->sec_info,
5314 toff);
5315
5316 if (sym_type != STT_SECTION)
5317 toff += irel->r_addend;
5318 }
5319 /* PLTREL24 addends are special. */
5320 else if (r_type != R_PPC_PLTREL24)
5321 toff += irel->r_addend;
5322
5323 /* Attempted -shared link of non-pic code loses. */
5324 if (tsec->output_section == NULL)
5325 continue;
5326
5327 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5328
5329 roff = irel->r_offset;
5330 reladdr = isec->output_section->vma + isec->output_offset + roff;
5331
5332 /* If the branch is in range, no need to do anything. */
5333 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5334 continue;
5335
5336 /* Look for an existing fixup to this address. */
5337 for (f = fixups; f ; f = f->next)
5338 if (f->tsec == tsec && f->toff == toff)
5339 break;
5340
5341 if (f == NULL)
5342 {
5343 size_t size;
5344 unsigned long stub_rtype;
5345
5346 val = trampoff - roff;
5347 if (val >= max_branch_offset)
5348 /* Oh dear, we can't reach a trampoline. Don't try to add
5349 one. We'll report an error later. */
5350 continue;
5351
5352 if (link_info->shared)
5353 {
5354 size = 4 * ARRAY_SIZE (shared_stub_entry);
5355 insn_offset = 12;
5356 stub_rtype = R_PPC_RELAX32PC;
5357 }
5358 else
5359 {
5360 size = 4 * ARRAY_SIZE (stub_entry);
5361 insn_offset = 0;
5362 stub_rtype = R_PPC_RELAX32;
5363 }
5364
5365 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5366 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5367 abort ();
5368 if (tsec == htab->plt
5369 || tsec == htab->glink)
5370 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5371
5372 /* Hijack the old relocation. Since we need two
5373 relocations for this use a "composite" reloc. */
5374 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5375 stub_rtype);
5376 irel->r_offset = trampoff + insn_offset;
5377
5378 /* Record the fixup so we don't do it again this section. */
5379 f = bfd_malloc (sizeof (*f));
5380 f->next = fixups;
5381 f->tsec = tsec;
5382 f->toff = toff;
5383 f->trampoff = trampoff;
5384 fixups = f;
5385
5386 trampoff += size;
5387 }
5388 else
5389 {
5390 val = f->trampoff - roff;
5391 if (val >= max_branch_offset)
5392 continue;
5393
5394 /* Nop out the reloc, since we're finalizing things here. */
5395 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5396 }
5397
5398 /* Get the section contents. */
5399 if (contents == NULL)
5400 {
5401 /* Get cached copy if it exists. */
5402 if (elf_section_data (isec)->this_hdr.contents != NULL)
5403 contents = elf_section_data (isec)->this_hdr.contents;
5404 else
5405 {
5406 /* Go get them off disk. */
5407 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5408 goto error_return;
5409 }
5410 }
5411
5412 /* Fix up the existing branch to hit the trampoline. */
5413 hit_addr = contents + roff;
5414 switch (r_type)
5415 {
5416 case R_PPC_REL24:
5417 case R_PPC_LOCAL24PC:
5418 case R_PPC_PLTREL24:
5419 t0 = bfd_get_32 (abfd, hit_addr);
5420 t0 &= ~0x3fffffc;
5421 t0 |= val & 0x3fffffc;
5422 bfd_put_32 (abfd, t0, hit_addr);
5423 break;
5424
5425 case R_PPC_REL14:
5426 case R_PPC_REL14_BRTAKEN:
5427 case R_PPC_REL14_BRNTAKEN:
5428 t0 = bfd_get_32 (abfd, hit_addr);
5429 t0 &= ~0xfffc;
5430 t0 |= val & 0xfffc;
5431 bfd_put_32 (abfd, t0, hit_addr);
5432 break;
5433 }
5434 }
5435
5436 /* Write out the trampolines. */
5437 changed = fixups != NULL;
5438 if (fixups != NULL)
5439 {
5440 const int *stub;
5441 bfd_byte *dest;
5442 bfd_vma val;
5443 int i, size;
5444
5445 do
5446 {
5447 struct one_fixup *f = fixups;
5448 fixups = fixups->next;
5449 free (f);
5450 }
5451 while (fixups);
5452
5453 contents = bfd_realloc (contents, trampoff);
5454 if (contents == NULL)
5455 goto error_return;
5456
5457 isec->size = (isec->size + 3) & (bfd_vma) -4;
5458 /* Branch around the trampolines. */
5459 val = trampoff - isec->size + 0x48000000;
5460 dest = contents + isec->size;
5461 isec->size = trampoff;
5462 bfd_put_32 (abfd, val, dest);
5463 dest += 4;
5464
5465 if (link_info->shared)
5466 {
5467 stub = shared_stub_entry;
5468 size = ARRAY_SIZE (shared_stub_entry);
5469 }
5470 else
5471 {
5472 stub = stub_entry;
5473 size = ARRAY_SIZE (stub_entry);
5474 }
5475
5476 i = 0;
5477 while (dest < contents + trampoff)
5478 {
5479 bfd_put_32 (abfd, stub[i], dest);
5480 i++;
5481 if (i == size)
5482 i = 0;
5483 dest += 4;
5484 }
5485 BFD_ASSERT (i == 0);
5486 }
5487
5488 if (isymbuf != NULL
5489 && symtab_hdr->contents != (unsigned char *) isymbuf)
5490 {
5491 if (! link_info->keep_memory)
5492 free (isymbuf);
5493 else
5494 {
5495 /* Cache the symbols for elf_link_input_bfd. */
5496 symtab_hdr->contents = (unsigned char *) isymbuf;
5497 }
5498 }
5499
5500 if (contents != NULL
5501 && elf_section_data (isec)->this_hdr.contents != contents)
5502 {
5503 if (!changed && !link_info->keep_memory)
5504 free (contents);
5505 else
5506 {
5507 /* Cache the section contents for elf_link_input_bfd. */
5508 elf_section_data (isec)->this_hdr.contents = contents;
5509 }
5510 }
5511
5512 if (elf_section_data (isec)->relocs != internal_relocs)
5513 {
5514 if (!changed)
5515 free (internal_relocs);
5516 else
5517 elf_section_data (isec)->relocs = internal_relocs;
5518 }
5519
5520 *again = changed;
5521 return TRUE;
5522
5523 error_return:
5524 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5525 free (isymbuf);
5526 if (contents != NULL
5527 && elf_section_data (isec)->this_hdr.contents != contents)
5528 free (contents);
5529 if (internal_relocs != NULL
5530 && elf_section_data (isec)->relocs != internal_relocs)
5531 free (internal_relocs);
5532 return FALSE;
5533 }
5534 \f
5535 /* What to do when ld finds relocations against symbols defined in
5536 discarded sections. */
5537
5538 static unsigned int
5539 ppc_elf_action_discarded (asection *sec)
5540 {
5541 if (strcmp (".fixup", sec->name) == 0)
5542 return 0;
5543
5544 if (strcmp (".got2", sec->name) == 0)
5545 return 0;
5546
5547 return _bfd_elf_default_action_discarded (sec);
5548 }
5549 \f
5550 /* Fill in the address for a pointer generated in a linker section. */
5551
5552 static bfd_vma
5553 elf_finish_pointer_linker_section (bfd *input_bfd,
5554 elf_linker_section_t *lsect,
5555 struct elf_link_hash_entry *h,
5556 bfd_vma relocation,
5557 const Elf_Internal_Rela *rel)
5558 {
5559 elf_linker_section_pointers_t *linker_section_ptr;
5560
5561 BFD_ASSERT (lsect != NULL);
5562
5563 if (h != NULL)
5564 {
5565 /* Handle global symbol. */
5566 struct ppc_elf_link_hash_entry *eh;
5567
5568 eh = (struct ppc_elf_link_hash_entry *) h;
5569 BFD_ASSERT (eh->elf.def_regular);
5570 linker_section_ptr = eh->linker_section_pointer;
5571 }
5572 else
5573 {
5574 /* Handle local symbol. */
5575 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5576
5577 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5578 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5579 }
5580
5581 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5582 rel->r_addend,
5583 lsect);
5584 BFD_ASSERT (linker_section_ptr != NULL);
5585
5586 /* Offset will always be a multiple of four, so use the bottom bit
5587 as a "written" flag. */
5588 if ((linker_section_ptr->offset & 1) == 0)
5589 {
5590 bfd_put_32 (lsect->section->owner,
5591 relocation + linker_section_ptr->addend,
5592 lsect->section->contents + linker_section_ptr->offset);
5593 linker_section_ptr->offset += 1;
5594 }
5595
5596 relocation = (lsect->section->output_offset
5597 + linker_section_ptr->offset - 1
5598 - 0x8000);
5599
5600 #ifdef DEBUG
5601 fprintf (stderr,
5602 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5603 lsect->name, (long) relocation, (long) relocation);
5604 #endif
5605
5606 /* Subtract out the addend, because it will get added back in by the normal
5607 processing. */
5608 return relocation - linker_section_ptr->addend;
5609 }
5610
5611 /* The RELOCATE_SECTION function is called by the ELF backend linker
5612 to handle the relocations for a section.
5613
5614 The relocs are always passed as Rela structures; if the section
5615 actually uses Rel structures, the r_addend field will always be
5616 zero.
5617
5618 This function is responsible for adjust the section contents as
5619 necessary, and (if using Rela relocs and generating a
5620 relocatable output file) adjusting the reloc addend as
5621 necessary.
5622
5623 This function does not have to worry about setting the reloc
5624 address or the reloc symbol index.
5625
5626 LOCAL_SYMS is a pointer to the swapped in local symbols.
5627
5628 LOCAL_SECTIONS is an array giving the section in the input file
5629 corresponding to the st_shndx field of each local symbol.
5630
5631 The global hash table entry for the global symbols can be found
5632 via elf_sym_hashes (input_bfd).
5633
5634 When generating relocatable output, this function must handle
5635 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5636 going to be the section symbol corresponding to the output
5637 section, which means that the addend must be adjusted
5638 accordingly. */
5639
5640 static bfd_boolean
5641 ppc_elf_relocate_section (bfd *output_bfd,
5642 struct bfd_link_info *info,
5643 bfd *input_bfd,
5644 asection *input_section,
5645 bfd_byte *contents,
5646 Elf_Internal_Rela *relocs,
5647 Elf_Internal_Sym *local_syms,
5648 asection **local_sections)
5649 {
5650 Elf_Internal_Shdr *symtab_hdr;
5651 struct elf_link_hash_entry **sym_hashes;
5652 struct ppc_elf_link_hash_table *htab;
5653 Elf_Internal_Rela *rel;
5654 Elf_Internal_Rela *relend;
5655 Elf_Internal_Rela outrel;
5656 bfd_byte *loc;
5657 asection *got2, *sreloc = NULL;
5658 bfd_vma *local_got_offsets;
5659 bfd_boolean ret = TRUE;
5660 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5661
5662 #ifdef DEBUG
5663 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5664 "%ld relocations%s",
5665 input_bfd, input_section,
5666 (long) input_section->reloc_count,
5667 (info->relocatable) ? " (relocatable)" : "");
5668 #endif
5669
5670 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5671
5672 /* Initialize howto table if not already done. */
5673 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5674 ppc_elf_howto_init ();
5675
5676 htab = ppc_elf_hash_table (info);
5677 local_got_offsets = elf_local_got_offsets (input_bfd);
5678 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5679 sym_hashes = elf_sym_hashes (input_bfd);
5680 rel = relocs;
5681 relend = relocs + input_section->reloc_count;
5682 for (; rel < relend; rel++)
5683 {
5684 enum elf_ppc_reloc_type r_type;
5685 bfd_vma addend;
5686 bfd_reloc_status_type r;
5687 Elf_Internal_Sym *sym;
5688 asection *sec;
5689 struct elf_link_hash_entry *h;
5690 const char *sym_name;
5691 reloc_howto_type *howto;
5692 unsigned long r_symndx;
5693 bfd_vma relocation;
5694 bfd_vma branch_bit, insn, from;
5695 bfd_boolean unresolved_reloc;
5696 bfd_boolean warned;
5697 unsigned int tls_type, tls_mask, tls_gd;
5698
5699 r_type = ELF32_R_TYPE (rel->r_info);
5700 sym = NULL;
5701 sec = NULL;
5702 h = NULL;
5703 unresolved_reloc = FALSE;
5704 warned = FALSE;
5705 r_symndx = ELF32_R_SYM (rel->r_info);
5706
5707 if (r_symndx < symtab_hdr->sh_info)
5708 {
5709 sym = local_syms + r_symndx;
5710 sec = local_sections[r_symndx];
5711 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5712
5713 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5714 }
5715 else
5716 {
5717 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5718 r_symndx, symtab_hdr, sym_hashes,
5719 h, sec, relocation,
5720 unresolved_reloc, warned);
5721
5722 sym_name = h->root.root.string;
5723 }
5724
5725 if (sec != NULL && elf_discarded_section (sec))
5726 {
5727 /* For relocs against symbols from removed linkonce sections,
5728 or sections discarded by a linker script, we just want the
5729 section contents zeroed. Avoid any special processing. */
5730 howto = NULL;
5731 if (r_type < R_PPC_max)
5732 howto = ppc_elf_howto_table[r_type];
5733 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5734 rel->r_info = 0;
5735 rel->r_addend = 0;
5736 continue;
5737 }
5738
5739 if (info->relocatable)
5740 {
5741 if (got2 != NULL
5742 && r_type == R_PPC_PLTREL24
5743 && rel->r_addend >= 32768)
5744 {
5745 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5746 addend specifies the GOT pointer offset within .got2. */
5747 rel->r_addend += got2->output_offset;
5748 }
5749 continue;
5750 }
5751
5752 /* TLS optimizations. Replace instruction sequences and relocs
5753 based on information we collected in tls_optimize. We edit
5754 RELOCS so that --emit-relocs will output something sensible
5755 for the final instruction stream. */
5756 tls_mask = 0;
5757 tls_gd = 0;
5758 if (IS_PPC_TLS_RELOC (r_type))
5759 {
5760 if (h != NULL)
5761 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5762 else if (local_got_offsets != NULL)
5763 {
5764 char *lgot_masks;
5765 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5766 tls_mask = lgot_masks[r_symndx];
5767 }
5768 }
5769
5770 /* Ensure reloc mapping code below stays sane. */
5771 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5772 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5773 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5774 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5775 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5776 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5777 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5778 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5779 abort ();
5780 switch (r_type)
5781 {
5782 default:
5783 break;
5784
5785 case R_PPC_GOT_TPREL16:
5786 case R_PPC_GOT_TPREL16_LO:
5787 if (tls_mask != 0
5788 && (tls_mask & TLS_TPREL) == 0)
5789 {
5790 bfd_vma insn;
5791 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5792 insn &= 31 << 21;
5793 insn |= 0x3c020000; /* addis 0,2,0 */
5794 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5795 r_type = R_PPC_TPREL16_HA;
5796 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5797 }
5798 break;
5799
5800 case R_PPC_TLS:
5801 if (tls_mask != 0
5802 && (tls_mask & TLS_TPREL) == 0)
5803 {
5804 bfd_vma insn, rtra;
5805 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5806 if ((insn & ((31 << 26) | (31 << 11)))
5807 == ((31 << 26) | (2 << 11)))
5808 rtra = insn & ((1 << 26) - (1 << 16));
5809 else if ((insn & ((31 << 26) | (31 << 16)))
5810 == ((31 << 26) | (2 << 16)))
5811 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5812 else
5813 abort ();
5814 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5815 /* add -> addi. */
5816 insn = 14 << 26;
5817 else if ((insn & (31 << 1)) == 23 << 1
5818 && ((insn & (31 << 6)) < 14 << 6
5819 || ((insn & (31 << 6)) >= 16 << 6
5820 && (insn & (31 << 6)) < 24 << 6)))
5821 /* load and store indexed -> dform. */
5822 insn = (32 | ((insn >> 6) & 31)) << 26;
5823 else if ((insn & (31 << 1)) == 21 << 1
5824 && (insn & (0x1a << 6)) == 0)
5825 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5826 insn = (((58 | ((insn >> 6) & 4)) << 26)
5827 | ((insn >> 6) & 1));
5828 else if ((insn & (31 << 1)) == 21 << 1
5829 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5830 /* lwax -> lwa. */
5831 insn = (58 << 26) | 2;
5832 else
5833 abort ();
5834 insn |= rtra;
5835 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5836 r_type = R_PPC_TPREL16_LO;
5837 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5838
5839 /* Was PPC_TLS which sits on insn boundary, now
5840 PPC_TPREL16_LO which is at low-order half-word. */
5841 rel->r_offset += d_offset;
5842 }
5843 break;
5844
5845 case R_PPC_GOT_TLSGD16_HI:
5846 case R_PPC_GOT_TLSGD16_HA:
5847 tls_gd = TLS_TPRELGD;
5848 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5849 goto tls_gdld_hi;
5850 break;
5851
5852 case R_PPC_GOT_TLSLD16_HI:
5853 case R_PPC_GOT_TLSLD16_HA:
5854 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5855 {
5856 tls_gdld_hi:
5857 if ((tls_mask & tls_gd) != 0)
5858 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5859 + R_PPC_GOT_TPREL16);
5860 else
5861 {
5862 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5863 rel->r_offset -= d_offset;
5864 r_type = R_PPC_NONE;
5865 }
5866 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5867 }
5868 break;
5869
5870 case R_PPC_GOT_TLSGD16:
5871 case R_PPC_GOT_TLSGD16_LO:
5872 tls_gd = TLS_TPRELGD;
5873 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5874 goto tls_get_addr_check;
5875 break;
5876
5877 case R_PPC_GOT_TLSLD16:
5878 case R_PPC_GOT_TLSLD16_LO:
5879 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5880 {
5881 tls_get_addr_check:
5882 if (rel + 1 < relend)
5883 {
5884 enum elf_ppc_reloc_type r_type2;
5885 unsigned long r_symndx2;
5886 struct elf_link_hash_entry *h2;
5887 bfd_vma insn1, insn2;
5888 bfd_vma offset;
5889
5890 /* The next instruction should be a call to
5891 __tls_get_addr. Peek at the reloc to be sure. */
5892 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5893 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5894 if (r_symndx2 < symtab_hdr->sh_info
5895 || (r_type2 != R_PPC_REL14
5896 && r_type2 != R_PPC_REL14_BRTAKEN
5897 && r_type2 != R_PPC_REL14_BRNTAKEN
5898 && r_type2 != R_PPC_REL24
5899 && r_type2 != R_PPC_PLTREL24))
5900 break;
5901
5902 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5903 while (h2->root.type == bfd_link_hash_indirect
5904 || h2->root.type == bfd_link_hash_warning)
5905 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5906 if (h2 == NULL || h2 != htab->tls_get_addr)
5907 break;
5908
5909 /* OK, it checks out. Replace the call. */
5910 offset = rel[1].r_offset;
5911 insn1 = bfd_get_32 (output_bfd,
5912 contents + rel->r_offset - d_offset);
5913 if ((tls_mask & tls_gd) != 0)
5914 {
5915 /* IE */
5916 insn1 &= (1 << 26) - 1;
5917 insn1 |= 32 << 26; /* lwz */
5918 insn2 = 0x7c631214; /* add 3,3,2 */
5919 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5920 rel[1].r_addend = 0;
5921 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5922 + R_PPC_GOT_TPREL16);
5923 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5924 }
5925 else
5926 {
5927 /* LE */
5928 insn1 = 0x3c620000; /* addis 3,2,0 */
5929 insn2 = 0x38630000; /* addi 3,3,0 */
5930 if (tls_gd == 0)
5931 {
5932 /* Was an LD reloc. */
5933 r_symndx = 0;
5934 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5935 }
5936 r_type = R_PPC_TPREL16_HA;
5937 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5938 rel[1].r_info = ELF32_R_INFO (r_symndx,
5939 R_PPC_TPREL16_LO);
5940 rel[1].r_offset += d_offset;
5941 rel[1].r_addend = rel->r_addend;
5942 }
5943 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
5944 bfd_put_32 (output_bfd, insn2, contents + offset);
5945 if (tls_gd == 0)
5946 {
5947 /* We changed the symbol on an LD reloc. Start over
5948 in order to get h, sym, sec etc. right. */
5949 rel--;
5950 continue;
5951 }
5952 }
5953 }
5954 break;
5955 }
5956
5957 /* Handle other relocations that tweak non-addend part of insn. */
5958 branch_bit = 0;
5959 switch (r_type)
5960 {
5961 default:
5962 break;
5963
5964 /* Branch taken prediction relocations. */
5965 case R_PPC_ADDR14_BRTAKEN:
5966 case R_PPC_REL14_BRTAKEN:
5967 branch_bit = BRANCH_PREDICT_BIT;
5968 /* Fall thru */
5969
5970 /* Branch not taken prediction relocations. */
5971 case R_PPC_ADDR14_BRNTAKEN:
5972 case R_PPC_REL14_BRNTAKEN:
5973 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5974 insn &= ~BRANCH_PREDICT_BIT;
5975 insn |= branch_bit;
5976
5977 from = (rel->r_offset
5978 + input_section->output_offset
5979 + input_section->output_section->vma);
5980
5981 /* Invert 'y' bit if not the default. */
5982 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5983 insn ^= BRANCH_PREDICT_BIT;
5984
5985 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5986 break;
5987 }
5988
5989 addend = rel->r_addend;
5990 tls_type = 0;
5991 howto = NULL;
5992 if (r_type < R_PPC_max)
5993 howto = ppc_elf_howto_table[r_type];
5994 switch (r_type)
5995 {
5996 default:
5997 (*_bfd_error_handler)
5998 (_("%B: unknown relocation type %d for symbol %s"),
5999 input_bfd, (int) r_type, sym_name);
6000
6001 bfd_set_error (bfd_error_bad_value);
6002 ret = FALSE;
6003 continue;
6004
6005 case R_PPC_NONE:
6006 case R_PPC_TLS:
6007 case R_PPC_EMB_MRKREF:
6008 case R_PPC_GNU_VTINHERIT:
6009 case R_PPC_GNU_VTENTRY:
6010 continue;
6011
6012 /* GOT16 relocations. Like an ADDR16 using the symbol's
6013 address in the GOT as relocation value instead of the
6014 symbol's value itself. Also, create a GOT entry for the
6015 symbol and put the symbol value there. */
6016 case R_PPC_GOT_TLSGD16:
6017 case R_PPC_GOT_TLSGD16_LO:
6018 case R_PPC_GOT_TLSGD16_HI:
6019 case R_PPC_GOT_TLSGD16_HA:
6020 tls_type = TLS_TLS | TLS_GD;
6021 goto dogot;
6022
6023 case R_PPC_GOT_TLSLD16:
6024 case R_PPC_GOT_TLSLD16_LO:
6025 case R_PPC_GOT_TLSLD16_HI:
6026 case R_PPC_GOT_TLSLD16_HA:
6027 tls_type = TLS_TLS | TLS_LD;
6028 goto dogot;
6029
6030 case R_PPC_GOT_TPREL16:
6031 case R_PPC_GOT_TPREL16_LO:
6032 case R_PPC_GOT_TPREL16_HI:
6033 case R_PPC_GOT_TPREL16_HA:
6034 tls_type = TLS_TLS | TLS_TPREL;
6035 goto dogot;
6036
6037 case R_PPC_GOT_DTPREL16:
6038 case R_PPC_GOT_DTPREL16_LO:
6039 case R_PPC_GOT_DTPREL16_HI:
6040 case R_PPC_GOT_DTPREL16_HA:
6041 tls_type = TLS_TLS | TLS_DTPREL;
6042 goto dogot;
6043
6044 case R_PPC_GOT16:
6045 case R_PPC_GOT16_LO:
6046 case R_PPC_GOT16_HI:
6047 case R_PPC_GOT16_HA:
6048 dogot:
6049 {
6050 /* Relocation is to the entry for this symbol in the global
6051 offset table. */
6052 bfd_vma off;
6053 bfd_vma *offp;
6054 unsigned long indx;
6055
6056 if (htab->got == NULL)
6057 abort ();
6058
6059 indx = 0;
6060 if (tls_type == (TLS_TLS | TLS_LD)
6061 && (h == NULL
6062 || !h->def_dynamic))
6063 offp = &htab->tlsld_got.offset;
6064 else if (h != NULL)
6065 {
6066 bfd_boolean dyn;
6067 dyn = htab->elf.dynamic_sections_created;
6068 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6069 || (info->shared
6070 && SYMBOL_REFERENCES_LOCAL (info, h)))
6071 /* This is actually a static link, or it is a
6072 -Bsymbolic link and the symbol is defined
6073 locally, or the symbol was forced to be local
6074 because of a version file. */
6075 ;
6076 else
6077 {
6078 indx = h->dynindx;
6079 unresolved_reloc = FALSE;
6080 }
6081 offp = &h->got.offset;
6082 }
6083 else
6084 {
6085 if (local_got_offsets == NULL)
6086 abort ();
6087 offp = &local_got_offsets[r_symndx];
6088 }
6089
6090 /* The offset must always be a multiple of 4. We use the
6091 least significant bit to record whether we have already
6092 processed this entry. */
6093 off = *offp;
6094 if ((off & 1) != 0)
6095 off &= ~1;
6096 else
6097 {
6098 unsigned int tls_m = (tls_mask
6099 & (TLS_LD | TLS_GD | TLS_DTPREL
6100 | TLS_TPREL | TLS_TPRELGD));
6101
6102 if (offp == &htab->tlsld_got.offset)
6103 tls_m = TLS_LD;
6104 else if (h == NULL
6105 || !h->def_dynamic)
6106 tls_m &= ~TLS_LD;
6107
6108 /* We might have multiple got entries for this sym.
6109 Initialize them all. */
6110 do
6111 {
6112 int tls_ty = 0;
6113
6114 if ((tls_m & TLS_LD) != 0)
6115 {
6116 tls_ty = TLS_TLS | TLS_LD;
6117 tls_m &= ~TLS_LD;
6118 }
6119 else if ((tls_m & TLS_GD) != 0)
6120 {
6121 tls_ty = TLS_TLS | TLS_GD;
6122 tls_m &= ~TLS_GD;
6123 }
6124 else if ((tls_m & TLS_DTPREL) != 0)
6125 {
6126 tls_ty = TLS_TLS | TLS_DTPREL;
6127 tls_m &= ~TLS_DTPREL;
6128 }
6129 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6130 {
6131 tls_ty = TLS_TLS | TLS_TPREL;
6132 tls_m = 0;
6133 }
6134
6135 /* Generate relocs for the dynamic linker. */
6136 if ((info->shared || indx != 0)
6137 && (h == NULL
6138 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6139 || h->root.type != bfd_link_hash_undefweak))
6140 {
6141 outrel.r_offset = (htab->got->output_section->vma
6142 + htab->got->output_offset
6143 + off);
6144 outrel.r_addend = 0;
6145 if (tls_ty & (TLS_LD | TLS_GD))
6146 {
6147 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6148 if (tls_ty == (TLS_TLS | TLS_GD))
6149 {
6150 loc = htab->relgot->contents;
6151 loc += (htab->relgot->reloc_count++
6152 * sizeof (Elf32_External_Rela));
6153 bfd_elf32_swap_reloca_out (output_bfd,
6154 &outrel, loc);
6155 outrel.r_offset += 4;
6156 outrel.r_info
6157 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6158 }
6159 }
6160 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6161 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6162 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6163 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6164 else if (indx == 0)
6165 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6166 else
6167 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6168 if (indx == 0)
6169 {
6170 outrel.r_addend += relocation;
6171 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6172 outrel.r_addend -= htab->elf.tls_sec->vma;
6173 }
6174 loc = htab->relgot->contents;
6175 loc += (htab->relgot->reloc_count++
6176 * sizeof (Elf32_External_Rela));
6177 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6178 }
6179
6180 /* Init the .got section contents if we're not
6181 emitting a reloc. */
6182 else
6183 {
6184 bfd_vma value = relocation;
6185
6186 if (tls_ty == (TLS_TLS | TLS_LD))
6187 value = 1;
6188 else if (tls_ty != 0)
6189 {
6190 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6191 if (tls_ty == (TLS_TLS | TLS_TPREL))
6192 value += DTP_OFFSET - TP_OFFSET;
6193
6194 if (tls_ty == (TLS_TLS | TLS_GD))
6195 {
6196 bfd_put_32 (output_bfd, value,
6197 htab->got->contents + off + 4);
6198 value = 1;
6199 }
6200 }
6201 bfd_put_32 (output_bfd, value,
6202 htab->got->contents + off);
6203 }
6204
6205 off += 4;
6206 if (tls_ty & (TLS_LD | TLS_GD))
6207 off += 4;
6208 }
6209 while (tls_m != 0);
6210
6211 off = *offp;
6212 *offp = off | 1;
6213 }
6214
6215 if (off >= (bfd_vma) -2)
6216 abort ();
6217
6218 if ((tls_type & TLS_TLS) != 0)
6219 {
6220 if (tls_type != (TLS_TLS | TLS_LD))
6221 {
6222 if ((tls_mask & TLS_LD) != 0
6223 && !(h == NULL
6224 || !h->def_dynamic))
6225 off += 8;
6226 if (tls_type != (TLS_TLS | TLS_GD))
6227 {
6228 if ((tls_mask & TLS_GD) != 0)
6229 off += 8;
6230 if (tls_type != (TLS_TLS | TLS_DTPREL))
6231 {
6232 if ((tls_mask & TLS_DTPREL) != 0)
6233 off += 4;
6234 }
6235 }
6236 }
6237 }
6238
6239 relocation = htab->got->output_offset + off;
6240 relocation -= htab->elf.hgot->root.u.def.value;
6241
6242 /* Addends on got relocations don't make much sense.
6243 x+off@got is actually x@got+off, and since the got is
6244 generated by a hash table traversal, the value in the
6245 got at entry m+n bears little relation to the entry m. */
6246 if (addend != 0)
6247 (*_bfd_error_handler)
6248 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6249 input_bfd,
6250 input_section,
6251 (long) rel->r_offset,
6252 howto->name,
6253 sym_name);
6254 }
6255 break;
6256
6257 /* Relocations that need no special processing. */
6258 case R_PPC_LOCAL24PC:
6259 /* It makes no sense to point a local relocation
6260 at a symbol not in this object. */
6261 if (unresolved_reloc)
6262 {
6263 if (! (*info->callbacks->undefined_symbol) (info,
6264 h->root.root.string,
6265 input_bfd,
6266 input_section,
6267 rel->r_offset,
6268 TRUE))
6269 return FALSE;
6270 continue;
6271 }
6272 break;
6273
6274 case R_PPC_DTPREL16:
6275 case R_PPC_DTPREL16_LO:
6276 case R_PPC_DTPREL16_HI:
6277 case R_PPC_DTPREL16_HA:
6278 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6279 break;
6280
6281 /* Relocations that may need to be propagated if this is a shared
6282 object. */
6283 case R_PPC_TPREL16:
6284 case R_PPC_TPREL16_LO:
6285 case R_PPC_TPREL16_HI:
6286 case R_PPC_TPREL16_HA:
6287 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6288 /* The TPREL16 relocs shouldn't really be used in shared
6289 libs as they will result in DT_TEXTREL being set, but
6290 support them anyway. */
6291 goto dodyn;
6292
6293 case R_PPC_TPREL32:
6294 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6295 goto dodyn;
6296
6297 case R_PPC_DTPREL32:
6298 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6299 goto dodyn;
6300
6301 case R_PPC_DTPMOD32:
6302 relocation = 1;
6303 addend = 0;
6304 goto dodyn;
6305
6306 case R_PPC_REL16:
6307 case R_PPC_REL16_LO:
6308 case R_PPC_REL16_HI:
6309 case R_PPC_REL16_HA:
6310 break;
6311
6312 case R_PPC_REL24:
6313 case R_PPC_REL32:
6314 case R_PPC_REL14:
6315 case R_PPC_REL14_BRTAKEN:
6316 case R_PPC_REL14_BRNTAKEN:
6317 /* If these relocations are not to a named symbol, they can be
6318 handled right here, no need to bother the dynamic linker. */
6319 if (SYMBOL_REFERENCES_LOCAL (info, h)
6320 || h == htab->elf.hgot)
6321 break;
6322 /* fall through */
6323
6324 /* Relocations that always need to be propagated if this is a shared
6325 object. */
6326 case R_PPC_ADDR32:
6327 case R_PPC_ADDR24:
6328 case R_PPC_ADDR16:
6329 case R_PPC_ADDR16_LO:
6330 case R_PPC_ADDR16_HI:
6331 case R_PPC_ADDR16_HA:
6332 case R_PPC_ADDR14:
6333 case R_PPC_ADDR14_BRTAKEN:
6334 case R_PPC_ADDR14_BRNTAKEN:
6335 case R_PPC_UADDR32:
6336 case R_PPC_UADDR16:
6337 dodyn:
6338 if ((input_section->flags & SEC_ALLOC) == 0)
6339 break;
6340 /* Fall thru. */
6341
6342 if ((info->shared
6343 && (h == NULL
6344 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6345 || h->root.type != bfd_link_hash_undefweak)
6346 && (MUST_BE_DYN_RELOC (r_type)
6347 || !SYMBOL_CALLS_LOCAL (info, h)))
6348 || (ELIMINATE_COPY_RELOCS
6349 && !info->shared
6350 && h != NULL
6351 && h->dynindx != -1
6352 && !h->non_got_ref
6353 && h->def_dynamic
6354 && !h->def_regular))
6355 {
6356 int skip;
6357
6358 #ifdef DEBUG
6359 fprintf (stderr, "ppc_elf_relocate_section needs to "
6360 "create relocation for %s\n",
6361 (h && h->root.root.string
6362 ? h->root.root.string : "<unknown>"));
6363 #endif
6364
6365 /* When generating a shared object, these relocations
6366 are copied into the output file to be resolved at run
6367 time. */
6368 if (sreloc == NULL)
6369 {
6370 const char *name;
6371
6372 name = (bfd_elf_string_from_elf_section
6373 (input_bfd,
6374 elf_elfheader (input_bfd)->e_shstrndx,
6375 elf_section_data (input_section)->rel_hdr.sh_name));
6376 if (name == NULL)
6377 return FALSE;
6378
6379 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6380 && strcmp (bfd_get_section_name (input_bfd,
6381 input_section),
6382 name + 5) == 0);
6383
6384 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6385 BFD_ASSERT (sreloc != NULL);
6386 }
6387
6388 skip = 0;
6389
6390 outrel.r_offset =
6391 _bfd_elf_section_offset (output_bfd, info, input_section,
6392 rel->r_offset);
6393 if (outrel.r_offset == (bfd_vma) -1
6394 || outrel.r_offset == (bfd_vma) -2)
6395 skip = (int) outrel.r_offset;
6396 outrel.r_offset += (input_section->output_section->vma
6397 + input_section->output_offset);
6398
6399 if (skip)
6400 memset (&outrel, 0, sizeof outrel);
6401 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6402 {
6403 unresolved_reloc = FALSE;
6404 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6405 outrel.r_addend = rel->r_addend;
6406 }
6407 else
6408 {
6409 outrel.r_addend = relocation + rel->r_addend;
6410
6411 if (r_type == R_PPC_ADDR32)
6412 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6413 else
6414 {
6415 long indx;
6416
6417 if (bfd_is_abs_section (sec))
6418 indx = 0;
6419 else if (sec == NULL || sec->owner == NULL)
6420 {
6421 bfd_set_error (bfd_error_bad_value);
6422 return FALSE;
6423 }
6424 else
6425 {
6426 asection *osec;
6427
6428 /* We are turning this relocation into one
6429 against a section symbol. It would be
6430 proper to subtract the symbol's value,
6431 osec->vma, from the emitted reloc addend,
6432 but ld.so expects buggy relocs. */
6433 osec = sec->output_section;
6434 indx = elf_section_data (osec)->dynindx;
6435 if (indx == 0)
6436 {
6437 osec = htab->elf.text_index_section;
6438 indx = elf_section_data (osec)->dynindx;
6439 }
6440 BFD_ASSERT (indx != 0);
6441 #ifdef DEBUG
6442 if (indx == 0)
6443 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6444 indx, osec->name, osec->flags,
6445 h->root.root.string);
6446 #endif
6447 }
6448
6449 outrel.r_info = ELF32_R_INFO (indx, r_type);
6450 }
6451 }
6452
6453 loc = sreloc->contents;
6454 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6455 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6456
6457 if (skip == -1)
6458 continue;
6459
6460 /* This reloc will be computed at runtime. We clear the memory
6461 so that it contains predictable value. */
6462 if (! skip
6463 && ((input_section->flags & SEC_ALLOC) != 0
6464 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6465 {
6466 relocation = howto->pc_relative ? outrel.r_offset : 0;
6467 addend = 0;
6468 break;
6469 }
6470 }
6471 break;
6472
6473 case R_PPC_RELAX32PC_PLT:
6474 case R_PPC_RELAX32_PLT:
6475 {
6476 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6477
6478 if (htab->plt_type == PLT_NEW)
6479 relocation = (htab->glink->output_section->vma
6480 + htab->glink->output_offset
6481 + ent->glink_offset);
6482 else
6483 relocation = (htab->plt->output_section->vma
6484 + htab->plt->output_offset
6485 + ent->plt.offset);
6486 addend = 0;
6487 }
6488 if (r_type == R_PPC_RELAX32_PLT)
6489 goto relax32;
6490 /* Fall thru */
6491
6492 case R_PPC_RELAX32PC:
6493 relocation -= (input_section->output_section->vma
6494 + input_section->output_offset
6495 + rel->r_offset - 4);
6496 /* Fall thru */
6497
6498 case R_PPC_RELAX32:
6499 relax32:
6500 {
6501 unsigned long t0;
6502 unsigned long t1;
6503
6504 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6505 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6506
6507 /* We're clearing the bits for R_PPC_ADDR16_HA
6508 and R_PPC_ADDR16_LO here. */
6509 t0 &= ~0xffff;
6510 t1 &= ~0xffff;
6511
6512 /* t0 is HA, t1 is LO */
6513 relocation += addend;
6514 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6515 t1 |= relocation & 0xffff;
6516
6517 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6518 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6519 }
6520 continue;
6521
6522 /* Indirect .sdata relocation. */
6523 case R_PPC_EMB_SDAI16:
6524 BFD_ASSERT (htab->sdata[0].section != NULL);
6525 relocation
6526 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6527 h, relocation, rel);
6528 break;
6529
6530 /* Indirect .sdata2 relocation. */
6531 case R_PPC_EMB_SDA2I16:
6532 BFD_ASSERT (htab->sdata[1].section != NULL);
6533 relocation
6534 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6535 h, relocation, rel);
6536 break;
6537
6538 /* Handle the TOC16 reloc. We want to use the offset within the .got
6539 section, not the actual VMA. This is appropriate when generating
6540 an embedded ELF object, for which the .got section acts like the
6541 AIX .toc section. */
6542 case R_PPC_TOC16: /* phony GOT16 relocations */
6543 BFD_ASSERT (sec != NULL);
6544 BFD_ASSERT (bfd_is_und_section (sec)
6545 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6546 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6547
6548 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6549 break;
6550
6551 case R_PPC_PLTREL24:
6552 /* Relocation is to the entry for this symbol in the
6553 procedure linkage table. */
6554 {
6555 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6556
6557 addend = 0;
6558 if (ent == NULL
6559 || htab->plt == NULL)
6560 {
6561 /* We didn't make a PLT entry for this symbol. This
6562 happens when statically linking PIC code, or when
6563 using -Bsymbolic. */
6564 break;
6565 }
6566
6567 unresolved_reloc = FALSE;
6568 if (htab->plt_type == PLT_NEW)
6569 relocation = (htab->glink->output_section->vma
6570 + htab->glink->output_offset
6571 + ent->glink_offset);
6572 else
6573 relocation = (htab->plt->output_section->vma
6574 + htab->plt->output_offset
6575 + ent->plt.offset);
6576 }
6577 break;
6578
6579 /* Relocate against _SDA_BASE_. */
6580 case R_PPC_SDAREL16:
6581 {
6582 const char *name;
6583 struct elf_link_hash_entry *sh;
6584
6585 BFD_ASSERT (sec != NULL);
6586 name = bfd_get_section_name (abfd, sec->output_section);
6587 if (! ((CONST_STRNEQ (name, ".sdata")
6588 && (name[6] == 0 || name[6] == '.'))
6589 || (CONST_STRNEQ (name, ".sbss")
6590 && (name[5] == 0 || name[5] == '.'))))
6591 {
6592 (*_bfd_error_handler)
6593 (_("%B: the target (%s) of a %s relocation is "
6594 "in the wrong output section (%s)"),
6595 input_bfd,
6596 sym_name,
6597 howto->name,
6598 name);
6599 }
6600 sh = htab->sdata[0].sym;
6601 addend -= (sh->root.u.def.value
6602 + sh->root.u.def.section->output_offset
6603 + sh->root.u.def.section->output_section->vma);
6604 }
6605 break;
6606
6607 /* Relocate against _SDA2_BASE_. */
6608 case R_PPC_EMB_SDA2REL:
6609 {
6610 const char *name;
6611 struct elf_link_hash_entry *sh;
6612
6613 BFD_ASSERT (sec != NULL);
6614 name = bfd_get_section_name (abfd, sec->output_section);
6615 if (! (CONST_STRNEQ (name, ".sdata2")
6616 || CONST_STRNEQ (name, ".sbss2")))
6617 {
6618 (*_bfd_error_handler)
6619 (_("%B: the target (%s) of a %s relocation is "
6620 "in the wrong output section (%s)"),
6621 input_bfd,
6622 sym_name,
6623 howto->name,
6624 name);
6625
6626 bfd_set_error (bfd_error_bad_value);
6627 ret = FALSE;
6628 continue;
6629 }
6630 sh = htab->sdata[1].sym;
6631 addend -= (sh->root.u.def.value
6632 + sh->root.u.def.section->output_offset
6633 + sh->root.u.def.section->output_section->vma);
6634 }
6635 break;
6636
6637 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6638 case R_PPC_EMB_SDA21:
6639 case R_PPC_EMB_RELSDA:
6640 {
6641 const char *name;
6642 int reg;
6643 struct elf_link_hash_entry *sh;
6644
6645 BFD_ASSERT (sec != NULL);
6646 name = bfd_get_section_name (abfd, sec->output_section);
6647 if (((CONST_STRNEQ (name, ".sdata")
6648 && (name[6] == 0 || name[6] == '.'))
6649 || (CONST_STRNEQ (name, ".sbss")
6650 && (name[5] == 0 || name[5] == '.'))))
6651 {
6652 reg = 13;
6653 sh = htab->sdata[0].sym;
6654 addend -= (sh->root.u.def.value
6655 + sh->root.u.def.section->output_offset
6656 + sh->root.u.def.section->output_section->vma);
6657 }
6658
6659 else if (CONST_STRNEQ (name, ".sdata2")
6660 || CONST_STRNEQ (name, ".sbss2"))
6661 {
6662 reg = 2;
6663 sh = htab->sdata[1].sym;
6664 addend -= (sh->root.u.def.value
6665 + sh->root.u.def.section->output_offset
6666 + sh->root.u.def.section->output_section->vma);
6667 }
6668
6669 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6670 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6671 {
6672 reg = 0;
6673 }
6674
6675 else
6676 {
6677 (*_bfd_error_handler)
6678 (_("%B: the target (%s) of a %s relocation is "
6679 "in the wrong output section (%s)"),
6680 input_bfd,
6681 sym_name,
6682 howto->name,
6683 name);
6684
6685 bfd_set_error (bfd_error_bad_value);
6686 ret = FALSE;
6687 continue;
6688 }
6689
6690 if (r_type == R_PPC_EMB_SDA21)
6691 { /* fill in register field */
6692 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6693 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6694 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6695 }
6696 }
6697 break;
6698
6699 /* Relocate against the beginning of the section. */
6700 case R_PPC_SECTOFF:
6701 case R_PPC_SECTOFF_LO:
6702 case R_PPC_SECTOFF_HI:
6703 case R_PPC_SECTOFF_HA:
6704 BFD_ASSERT (sec != NULL);
6705 addend -= sec->output_section->vma;
6706 break;
6707
6708 /* Negative relocations. */
6709 case R_PPC_EMB_NADDR32:
6710 case R_PPC_EMB_NADDR16:
6711 case R_PPC_EMB_NADDR16_LO:
6712 case R_PPC_EMB_NADDR16_HI:
6713 case R_PPC_EMB_NADDR16_HA:
6714 addend -= 2 * relocation;
6715 break;
6716
6717 case R_PPC_COPY:
6718 case R_PPC_GLOB_DAT:
6719 case R_PPC_JMP_SLOT:
6720 case R_PPC_RELATIVE:
6721 case R_PPC_PLT32:
6722 case R_PPC_PLTREL32:
6723 case R_PPC_PLT16_LO:
6724 case R_PPC_PLT16_HI:
6725 case R_PPC_PLT16_HA:
6726 case R_PPC_ADDR30:
6727 case R_PPC_EMB_RELSEC16:
6728 case R_PPC_EMB_RELST_LO:
6729 case R_PPC_EMB_RELST_HI:
6730 case R_PPC_EMB_RELST_HA:
6731 case R_PPC_EMB_BIT_FLD:
6732 (*_bfd_error_handler)
6733 (_("%B: relocation %s is not yet supported for symbol %s."),
6734 input_bfd,
6735 howto->name,
6736 sym_name);
6737
6738 bfd_set_error (bfd_error_invalid_operation);
6739 ret = FALSE;
6740 continue;
6741 }
6742
6743 /* Do any further special processing. */
6744 switch (r_type)
6745 {
6746 default:
6747 break;
6748
6749 case R_PPC_ADDR16_HA:
6750 case R_PPC_REL16_HA:
6751 case R_PPC_SECTOFF_HA:
6752 case R_PPC_TPREL16_HA:
6753 case R_PPC_DTPREL16_HA:
6754 case R_PPC_EMB_NADDR16_HA:
6755 case R_PPC_EMB_RELST_HA:
6756 /* It's just possible that this symbol is a weak symbol
6757 that's not actually defined anywhere. In that case,
6758 'sec' would be NULL, and we should leave the symbol
6759 alone (it will be set to zero elsewhere in the link). */
6760 if (sec == NULL)
6761 break;
6762 /* Fall thru */
6763
6764 case R_PPC_PLT16_HA:
6765 case R_PPC_GOT16_HA:
6766 case R_PPC_GOT_TLSGD16_HA:
6767 case R_PPC_GOT_TLSLD16_HA:
6768 case R_PPC_GOT_TPREL16_HA:
6769 case R_PPC_GOT_DTPREL16_HA:
6770 /* Add 0x10000 if sign bit in 0:15 is set.
6771 Bits 0:15 are not used. */
6772 addend += 0x8000;
6773 break;
6774 }
6775
6776 #ifdef DEBUG
6777 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6778 "offset = %ld, addend = %ld\n",
6779 howto->name,
6780 (int) r_type,
6781 sym_name,
6782 r_symndx,
6783 (long) rel->r_offset,
6784 (long) addend);
6785 #endif
6786
6787 if (unresolved_reloc
6788 && !((input_section->flags & SEC_DEBUGGING) != 0
6789 && h->def_dynamic))
6790 {
6791 (*_bfd_error_handler)
6792 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6793 input_bfd,
6794 input_section,
6795 (long) rel->r_offset,
6796 howto->name,
6797 sym_name);
6798 ret = FALSE;
6799 }
6800
6801 r = _bfd_final_link_relocate (howto,
6802 input_bfd,
6803 input_section,
6804 contents,
6805 rel->r_offset,
6806 relocation,
6807 addend);
6808
6809 if (r != bfd_reloc_ok)
6810 {
6811 if (r == bfd_reloc_overflow)
6812 {
6813 if (warned)
6814 continue;
6815 if (h != NULL
6816 && h->root.type == bfd_link_hash_undefweak
6817 && howto->pc_relative)
6818 {
6819 /* Assume this is a call protected by other code that
6820 detect the symbol is undefined. If this is the case,
6821 we can safely ignore the overflow. If not, the
6822 program is hosed anyway, and a little warning isn't
6823 going to help. */
6824
6825 continue;
6826 }
6827
6828 if (! (*info->callbacks->reloc_overflow) (info,
6829 (h ? &h->root : NULL),
6830 sym_name,
6831 howto->name,
6832 rel->r_addend,
6833 input_bfd,
6834 input_section,
6835 rel->r_offset))
6836 return FALSE;
6837 }
6838 else
6839 {
6840 (*_bfd_error_handler)
6841 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6842 input_bfd, input_section,
6843 (long) rel->r_offset, howto->name, sym_name, (int) r);
6844 ret = FALSE;
6845 }
6846 }
6847 }
6848
6849 #ifdef DEBUG
6850 fprintf (stderr, "\n");
6851 #endif
6852
6853 return ret;
6854 }
6855 \f
6856 #define PPC_LO(v) ((v) & 0xffff)
6857 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6858 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6859
6860 /* Finish up dynamic symbol handling. We set the contents of various
6861 dynamic sections here. */
6862
6863 static bfd_boolean
6864 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6865 struct bfd_link_info *info,
6866 struct elf_link_hash_entry *h,
6867 Elf_Internal_Sym *sym)
6868 {
6869 struct ppc_elf_link_hash_table *htab;
6870 struct plt_entry *ent;
6871 bfd_boolean doneone;
6872
6873 #ifdef DEBUG
6874 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6875 h->root.root.string);
6876 #endif
6877
6878 htab = ppc_elf_hash_table (info);
6879 BFD_ASSERT (htab->elf.dynobj != NULL);
6880
6881 doneone = FALSE;
6882 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6883 if (ent->plt.offset != (bfd_vma) -1)
6884 {
6885 if (!doneone)
6886 {
6887 Elf_Internal_Rela rela;
6888 bfd_byte *loc;
6889 bfd_vma reloc_index;
6890
6891 if (htab->plt_type == PLT_NEW)
6892 reloc_index = ent->plt.offset / 4;
6893 else
6894 {
6895 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6896 / htab->plt_slot_size);
6897 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6898 && htab->plt_type == PLT_OLD)
6899 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6900 }
6901
6902 /* This symbol has an entry in the procedure linkage table.
6903 Set it up. */
6904 if (htab->plt_type == PLT_VXWORKS)
6905 {
6906 bfd_vma got_offset;
6907 const bfd_vma *plt_entry;
6908
6909 /* The first three entries in .got.plt are reserved. */
6910 got_offset = (reloc_index + 3) * 4;
6911
6912 /* Use the right PLT. */
6913 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6914 : ppc_elf_vxworks_plt_entry;
6915
6916 /* Fill in the .plt on VxWorks. */
6917 if (info->shared)
6918 {
6919 bfd_vma got_offset_hi = (got_offset >> 16)
6920 + ((got_offset & 0x8000) >> 15);
6921
6922 bfd_put_32 (output_bfd,
6923 plt_entry[0] | (got_offset_hi & 0xffff),
6924 htab->plt->contents + ent->plt.offset + 0);
6925 bfd_put_32 (output_bfd,
6926 plt_entry[1] | (got_offset & 0xffff),
6927 htab->plt->contents + ent->plt.offset + 4);
6928 }
6929 else
6930 {
6931 bfd_vma got_loc
6932 = (got_offset
6933 + htab->elf.hgot->root.u.def.value
6934 + htab->elf.hgot->root.u.def.section->output_offset
6935 + htab->elf.hgot->root.u.def.section->output_section->vma);
6936 bfd_vma got_loc_hi = (got_loc >> 16)
6937 + ((got_loc & 0x8000) >> 15);
6938
6939 bfd_put_32 (output_bfd,
6940 plt_entry[0] | (got_loc_hi & 0xffff),
6941 htab->plt->contents + ent->plt.offset + 0);
6942 bfd_put_32 (output_bfd,
6943 plt_entry[1] | (got_loc & 0xffff),
6944 htab->plt->contents + ent->plt.offset + 4);
6945 }
6946
6947 bfd_put_32 (output_bfd, plt_entry[2],
6948 htab->plt->contents + ent->plt.offset + 8);
6949 bfd_put_32 (output_bfd, plt_entry[3],
6950 htab->plt->contents + ent->plt.offset + 12);
6951
6952 /* This instruction is an immediate load. The value loaded is
6953 the byte offset of the R_PPC_JMP_SLOT relocation from the
6954 start of the .rela.plt section. The value is stored in the
6955 low-order 16 bits of the load instruction. */
6956 /* NOTE: It appears that this is now an index rather than a
6957 prescaled offset. */
6958 bfd_put_32 (output_bfd,
6959 plt_entry[4] | reloc_index,
6960 htab->plt->contents + ent->plt.offset + 16);
6961 /* This instruction is a PC-relative branch whose target is
6962 the start of the PLT section. The address of this branch
6963 instruction is 20 bytes beyond the start of this PLT entry.
6964 The address is encoded in bits 6-29, inclusive. The value
6965 stored is right-shifted by two bits, permitting a 26-bit
6966 offset. */
6967 bfd_put_32 (output_bfd,
6968 (plt_entry[5]
6969 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6970 htab->plt->contents + ent->plt.offset + 20);
6971 bfd_put_32 (output_bfd, plt_entry[6],
6972 htab->plt->contents + ent->plt.offset + 24);
6973 bfd_put_32 (output_bfd, plt_entry[7],
6974 htab->plt->contents + ent->plt.offset + 28);
6975
6976 /* Fill in the GOT entry corresponding to this PLT slot with
6977 the address immediately after the the "bctr" instruction
6978 in this PLT entry. */
6979 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6980 + htab->plt->output_offset
6981 + ent->plt.offset + 16),
6982 htab->sgotplt->contents + got_offset);
6983
6984 if (!info->shared)
6985 {
6986 /* Fill in a couple of entries in .rela.plt.unloaded. */
6987 loc = htab->srelplt2->contents
6988 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6989 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6990 * sizeof (Elf32_External_Rela));
6991
6992 /* Provide the @ha relocation for the first instruction. */
6993 rela.r_offset = (htab->plt->output_section->vma
6994 + htab->plt->output_offset
6995 + ent->plt.offset + 2);
6996 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6997 R_PPC_ADDR16_HA);
6998 rela.r_addend = got_offset;
6999 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7000 loc += sizeof (Elf32_External_Rela);
7001
7002 /* Provide the @l relocation for the second instruction. */
7003 rela.r_offset = (htab->plt->output_section->vma
7004 + htab->plt->output_offset
7005 + ent->plt.offset + 6);
7006 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7007 R_PPC_ADDR16_LO);
7008 rela.r_addend = got_offset;
7009 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7010 loc += sizeof (Elf32_External_Rela);
7011
7012 /* Provide a relocation for the GOT entry corresponding to this
7013 PLT slot. Point it at the middle of the .plt entry. */
7014 rela.r_offset = (htab->sgotplt->output_section->vma
7015 + htab->sgotplt->output_offset
7016 + got_offset);
7017 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7018 R_PPC_ADDR32);
7019 rela.r_addend = ent->plt.offset + 16;
7020 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7021 }
7022
7023 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7024 In particular, the offset for the relocation is not the
7025 address of the PLT entry for this function, as specified
7026 by the ABI. Instead, the offset is set to the address of
7027 the GOT slot for this function. See EABI 4.4.4.1. */
7028 rela.r_offset = (htab->sgotplt->output_section->vma
7029 + htab->sgotplt->output_offset
7030 + got_offset);
7031
7032 }
7033 else
7034 {
7035 rela.r_offset = (htab->plt->output_section->vma
7036 + htab->plt->output_offset
7037 + ent->plt.offset);
7038 if (htab->plt_type == PLT_OLD)
7039 {
7040 /* We don't need to fill in the .plt. The ppc dynamic
7041 linker will fill it in. */
7042 }
7043 else
7044 {
7045 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7046 + htab->glink->output_section->vma
7047 + htab->glink->output_offset);
7048 bfd_put_32 (output_bfd, val,
7049 htab->plt->contents + ent->plt.offset);
7050 }
7051 }
7052
7053 /* Fill in the entry in the .rela.plt section. */
7054 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7055 rela.r_addend = 0;
7056
7057 loc = (htab->relplt->contents
7058 + reloc_index * sizeof (Elf32_External_Rela));
7059 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7060
7061 if (!h->def_regular)
7062 {
7063 /* Mark the symbol as undefined, rather than as defined in
7064 the .plt section. Leave the value alone. */
7065 sym->st_shndx = SHN_UNDEF;
7066 /* If the symbol is weak, we do need to clear the value.
7067 Otherwise, the PLT entry would provide a definition for
7068 the symbol even if the symbol wasn't defined anywhere,
7069 and so the symbol would never be NULL. */
7070 if (!h->ref_regular_nonweak)
7071 sym->st_value = 0;
7072 }
7073 doneone = TRUE;
7074 }
7075
7076 if (htab->plt_type == PLT_NEW)
7077 {
7078 bfd_vma plt;
7079 unsigned char *p;
7080
7081 plt = (ent->plt.offset
7082 + htab->plt->output_section->vma
7083 + htab->plt->output_offset);
7084 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7085
7086 if (info->shared || info->pie)
7087 {
7088 bfd_vma got = 0;
7089
7090 if (ent->addend >= 32768)
7091 got = (ent->addend
7092 + ent->sec->output_section->vma
7093 + ent->sec->output_offset);
7094 else if (htab->elf.hgot != NULL)
7095 got = (htab->elf.hgot->root.u.def.value
7096 + htab->elf.hgot->root.u.def.section->output_section->vma
7097 + htab->elf.hgot->root.u.def.section->output_offset);
7098
7099 plt -= got;
7100
7101 if (plt + 0x8000 < 0x10000)
7102 {
7103 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7104 p += 4;
7105 bfd_put_32 (output_bfd, MTCTR_11, p);
7106 p += 4;
7107 bfd_put_32 (output_bfd, BCTR, p);
7108 p += 4;
7109 bfd_put_32 (output_bfd, NOP, p);
7110 p += 4;
7111 }
7112 else
7113 {
7114 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7115 p += 4;
7116 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7117 p += 4;
7118 bfd_put_32 (output_bfd, MTCTR_11, p);
7119 p += 4;
7120 bfd_put_32 (output_bfd, BCTR, p);
7121 p += 4;
7122 }
7123 }
7124 else
7125 {
7126 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7127 p += 4;
7128 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7129 p += 4;
7130 bfd_put_32 (output_bfd, MTCTR_11, p);
7131 p += 4;
7132 bfd_put_32 (output_bfd, BCTR, p);
7133 p += 4;
7134
7135 /* We only need one non-PIC glink stub. */
7136 break;
7137 }
7138 }
7139 else
7140 break;
7141 }
7142
7143 if (h->needs_copy)
7144 {
7145 asection *s;
7146 Elf_Internal_Rela rela;
7147 bfd_byte *loc;
7148
7149 /* This symbols needs a copy reloc. Set it up. */
7150
7151 #ifdef DEBUG
7152 fprintf (stderr, ", copy");
7153 #endif
7154
7155 BFD_ASSERT (h->dynindx != -1);
7156
7157 if (ppc_elf_hash_entry (h)->has_sda_refs)
7158 s = htab->relsbss;
7159 else
7160 s = htab->relbss;
7161 BFD_ASSERT (s != NULL);
7162
7163 rela.r_offset = (h->root.u.def.value
7164 + h->root.u.def.section->output_section->vma
7165 + h->root.u.def.section->output_offset);
7166 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7167 rela.r_addend = 0;
7168 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7169 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7170 }
7171
7172 #ifdef DEBUG
7173 fprintf (stderr, "\n");
7174 #endif
7175
7176 /* Mark some specially defined symbols as absolute. */
7177 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7178 || (!htab->is_vxworks
7179 && (h == htab->elf.hgot
7180 || strcmp (h->root.root.string,
7181 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7182 sym->st_shndx = SHN_ABS;
7183
7184 return TRUE;
7185 }
7186 \f
7187 static enum elf_reloc_type_class
7188 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7189 {
7190 switch (ELF32_R_TYPE (rela->r_info))
7191 {
7192 case R_PPC_RELATIVE:
7193 return reloc_class_relative;
7194 case R_PPC_REL24:
7195 case R_PPC_ADDR24:
7196 case R_PPC_JMP_SLOT:
7197 return reloc_class_plt;
7198 case R_PPC_COPY:
7199 return reloc_class_copy;
7200 default:
7201 return reloc_class_normal;
7202 }
7203 }
7204 \f
7205 /* Finish up the dynamic sections. */
7206
7207 static bfd_boolean
7208 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7209 struct bfd_link_info *info)
7210 {
7211 asection *sdyn;
7212 asection *splt;
7213 struct ppc_elf_link_hash_table *htab;
7214 bfd_vma got;
7215 bfd * dynobj;
7216
7217 #ifdef DEBUG
7218 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7219 #endif
7220
7221 htab = ppc_elf_hash_table (info);
7222 dynobj = elf_hash_table (info)->dynobj;
7223 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7224 if (htab->is_vxworks)
7225 splt = bfd_get_section_by_name (dynobj, ".plt");
7226 else
7227 splt = NULL;
7228
7229 got = 0;
7230 if (htab->elf.hgot != NULL)
7231 got = (htab->elf.hgot->root.u.def.value
7232 + htab->elf.hgot->root.u.def.section->output_section->vma
7233 + htab->elf.hgot->root.u.def.section->output_offset);
7234
7235 if (htab->elf.dynamic_sections_created)
7236 {
7237 Elf32_External_Dyn *dyncon, *dynconend;
7238
7239 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7240
7241 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7242 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7243 for (; dyncon < dynconend; dyncon++)
7244 {
7245 Elf_Internal_Dyn dyn;
7246 asection *s;
7247
7248 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7249
7250 switch (dyn.d_tag)
7251 {
7252 case DT_PLTGOT:
7253 if (htab->is_vxworks)
7254 s = htab->sgotplt;
7255 else
7256 s = htab->plt;
7257 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7258 break;
7259
7260 case DT_PLTRELSZ:
7261 dyn.d_un.d_val = htab->relplt->size;
7262 break;
7263
7264 case DT_JMPREL:
7265 s = htab->relplt;
7266 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7267 break;
7268
7269 case DT_PPC_GOT:
7270 dyn.d_un.d_ptr = got;
7271 break;
7272
7273 case DT_RELASZ:
7274 if (htab->is_vxworks)
7275 {
7276 if (htab->relplt)
7277 dyn.d_un.d_ptr -= htab->relplt->size;
7278 break;
7279 }
7280 continue;
7281
7282 default:
7283 continue;
7284 }
7285
7286 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7287 }
7288 }
7289
7290 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7291 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7292 if (htab->got != NULL)
7293 {
7294 unsigned char *p = htab->got->contents;
7295 bfd_vma val;
7296
7297 p += htab->elf.hgot->root.u.def.value;
7298 if (htab->plt_type == PLT_OLD)
7299 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7300
7301 val = 0;
7302 if (sdyn != NULL)
7303 val = sdyn->output_section->vma + sdyn->output_offset;
7304 bfd_put_32 (output_bfd, val, p);
7305
7306 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7307 }
7308
7309 /* Fill in the first entry in the VxWorks procedure linkage table. */
7310 if (splt && splt->size > 0)
7311 {
7312 /* Use the right PLT. */
7313 static const bfd_vma *plt_entry = NULL;
7314 plt_entry = info->shared ?
7315 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7316
7317 if (!info->shared)
7318 {
7319 bfd_vma got_value =
7320 (htab->elf.hgot->root.u.def.section->output_section->vma
7321 + htab->elf.hgot->root.u.def.section->output_offset
7322 + htab->elf.hgot->root.u.def.value);
7323 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7324
7325 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7326 splt->contents + 0);
7327 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7328 splt->contents + 4);
7329 }
7330 else
7331 {
7332 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7333 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7334 }
7335 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7336 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7337 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7338 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7339 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7340 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7341
7342 if (! info->shared)
7343 {
7344 Elf_Internal_Rela rela;
7345 bfd_byte *loc;
7346
7347 loc = htab->srelplt2->contents;
7348
7349 /* Output the @ha relocation for the first instruction. */
7350 rela.r_offset = (htab->plt->output_section->vma
7351 + htab->plt->output_offset
7352 + 2);
7353 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7354 rela.r_addend = 0;
7355 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7356 loc += sizeof (Elf32_External_Rela);
7357
7358 /* Output the @l relocation for the second instruction. */
7359 rela.r_offset = (htab->plt->output_section->vma
7360 + htab->plt->output_offset
7361 + 6);
7362 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7363 rela.r_addend = 0;
7364 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7365 loc += sizeof (Elf32_External_Rela);
7366
7367 /* Fix up the remaining relocations. They may have the wrong
7368 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7369 in which symbols were output. */
7370 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7371 {
7372 Elf_Internal_Rela rel;
7373
7374 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7375 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7376 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7377 loc += sizeof (Elf32_External_Rela);
7378
7379 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7380 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7381 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7382 loc += sizeof (Elf32_External_Rela);
7383
7384 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7385 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7386 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7387 loc += sizeof (Elf32_External_Rela);
7388 }
7389 }
7390 }
7391
7392 if (htab->glink != NULL && htab->glink->contents != NULL)
7393 {
7394 unsigned char *p;
7395 unsigned char *endp;
7396 bfd_vma res0;
7397 unsigned int i;
7398
7399 /*
7400 * PIC glink code is the following:
7401 *
7402 * # ith PLT code stub.
7403 * addis 11,30,(plt+(i-1)*4-got)@ha
7404 * lwz 11,(plt+(i-1)*4-got)@l(11)
7405 * mtctr 11
7406 * bctr
7407 *
7408 * # A table of branches, one for each plt entry.
7409 * # The idea is that the plt call stub loads ctr (and r11) with these
7410 * # addresses, so (r11 - res_0) gives the plt index * 4.
7411 * res_0: b PLTresolve
7412 * res_1: b PLTresolve
7413 * .
7414 * # Some number of entries towards the end can be nops
7415 * res_n_m3: nop
7416 * res_n_m2: nop
7417 * res_n_m1:
7418 *
7419 * PLTresolve:
7420 * addis 11,11,(1f-res_0)@ha
7421 * mflr 0
7422 * bcl 20,31,1f
7423 * 1: addi 11,11,(1b-res_0)@l
7424 * mflr 12
7425 * mtlr 0
7426 * sub 11,11,12 # r11 = index * 4
7427 * addis 12,12,(got+4-1b)@ha
7428 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7429 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7430 * mtctr 0
7431 * add 0,11,11
7432 * add 11,0,11 # r11 = index * 12 = reloc offset.
7433 * bctr
7434 */
7435 static const unsigned int pic_plt_resolve[] =
7436 {
7437 ADDIS_11_11,
7438 MFLR_0,
7439 BCL_20_31,
7440 ADDI_11_11,
7441 MFLR_12,
7442 MTLR_0,
7443 SUB_11_11_12,
7444 ADDIS_12_12,
7445 LWZ_0_12,
7446 LWZ_12_12,
7447 MTCTR_0,
7448 ADD_0_11_11,
7449 ADD_11_0_11,
7450 BCTR,
7451 NOP,
7452 NOP
7453 };
7454
7455 static const unsigned int plt_resolve[] =
7456 {
7457 LIS_12,
7458 ADDIS_11_11,
7459 LWZ_0_12,
7460 ADDI_11_11,
7461 MTCTR_0,
7462 ADD_0_11_11,
7463 LWZ_12_12,
7464 ADD_11_0_11,
7465 BCTR,
7466 NOP,
7467 NOP,
7468 NOP,
7469 NOP,
7470 NOP,
7471 NOP,
7472 NOP
7473 };
7474
7475 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7476 abort ();
7477 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7478 abort ();
7479
7480 /* Build the branch table, one for each plt entry (less one),
7481 and perhaps some padding. */
7482 p = htab->glink->contents;
7483 p += htab->glink_pltresolve;
7484 endp = htab->glink->contents;
7485 endp += htab->glink->size - GLINK_PLTRESOLVE;
7486 while (p < endp - 8 * 4)
7487 {
7488 bfd_put_32 (output_bfd, B + endp - p, p);
7489 p += 4;
7490 }
7491 while (p < endp)
7492 {
7493 bfd_put_32 (output_bfd, NOP, p);
7494 p += 4;
7495 }
7496
7497 res0 = (htab->glink_pltresolve
7498 + htab->glink->output_section->vma
7499 + htab->glink->output_offset);
7500
7501 /* Last comes the PLTresolve stub. */
7502 if (info->shared || info->pie)
7503 {
7504 bfd_vma bcl;
7505
7506 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7507 {
7508 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7509 p += 4;
7510 }
7511 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7512
7513 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7514 + htab->glink->output_section->vma
7515 + htab->glink->output_offset);
7516
7517 bfd_put_32 (output_bfd,
7518 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7519 bfd_put_32 (output_bfd,
7520 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7521 bfd_put_32 (output_bfd,
7522 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7523 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7524 {
7525 bfd_put_32 (output_bfd,
7526 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7527 bfd_put_32 (output_bfd,
7528 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7529 }
7530 else
7531 {
7532 bfd_put_32 (output_bfd,
7533 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7534 bfd_put_32 (output_bfd,
7535 LWZ_12_12 + 4, p + 9*4);
7536 }
7537 }
7538 else
7539 {
7540 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7541 {
7542 bfd_put_32 (output_bfd, plt_resolve[i], p);
7543 p += 4;
7544 }
7545 p -= 4 * ARRAY_SIZE (plt_resolve);
7546
7547 bfd_put_32 (output_bfd,
7548 LIS_12 + PPC_HA (got + 4), p + 0*4);
7549 bfd_put_32 (output_bfd,
7550 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7551 bfd_put_32 (output_bfd,
7552 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7553 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7554 {
7555 bfd_put_32 (output_bfd,
7556 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7557 bfd_put_32 (output_bfd,
7558 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7559 }
7560 else
7561 {
7562 bfd_put_32 (output_bfd,
7563 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7564 bfd_put_32 (output_bfd,
7565 LWZ_12_12 + 4, p + 6*4);
7566 }
7567 }
7568 }
7569
7570 return TRUE;
7571 }
7572 \f
7573 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7574 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7575 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7576 #define TARGET_BIG_NAME "elf32-powerpc"
7577 #define ELF_ARCH bfd_arch_powerpc
7578 #define ELF_MACHINE_CODE EM_PPC
7579 #ifdef __QNXTARGET__
7580 #define ELF_MAXPAGESIZE 0x1000
7581 #else
7582 #define ELF_MAXPAGESIZE 0x10000
7583 #endif
7584 #define ELF_MINPAGESIZE 0x1000
7585 #define ELF_COMMONPAGESIZE 0x1000
7586 #define elf_info_to_howto ppc_elf_info_to_howto
7587
7588 #ifdef EM_CYGNUS_POWERPC
7589 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7590 #endif
7591
7592 #ifdef EM_PPC_OLD
7593 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7594 #endif
7595
7596 #define elf_backend_plt_not_loaded 1
7597 #define elf_backend_can_gc_sections 1
7598 #define elf_backend_can_refcount 1
7599 #define elf_backend_rela_normal 1
7600
7601 #define bfd_elf32_mkobject ppc_elf_mkobject
7602 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7603 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7604 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7605 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7606 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7607 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7608
7609 #define elf_backend_object_p ppc_elf_object_p
7610 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7611 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7612 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7613 #define elf_backend_relocate_section ppc_elf_relocate_section
7614 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7615 #define elf_backend_check_relocs ppc_elf_check_relocs
7616 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7617 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7618 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7619 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7620 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7621 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7622 #define elf_backend_fake_sections ppc_elf_fake_sections
7623 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7624 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7625 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7626 #define elf_backend_write_core_note ppc_elf_write_core_note
7627 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7628 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7629 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7630 #define elf_backend_write_section ppc_elf_write_section
7631 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7632 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7633 #define elf_backend_action_discarded ppc_elf_action_discarded
7634 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7635
7636 #include "elf32-target.h"
7637
7638 /* VxWorks Target */
7639
7640 #undef TARGET_LITTLE_SYM
7641 #undef TARGET_LITTLE_NAME
7642
7643 #undef TARGET_BIG_SYM
7644 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7645 #undef TARGET_BIG_NAME
7646 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7647
7648 /* VxWorks uses the elf default section flags for .plt. */
7649 static const struct bfd_elf_special_section *
7650 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7651 {
7652 if (sec->name == NULL)
7653 return NULL;
7654
7655 if (strcmp (sec->name, ".plt") == 0)
7656 return _bfd_elf_get_sec_type_attr (abfd, sec);
7657
7658 return ppc_elf_get_sec_type_attr (abfd, sec);
7659 }
7660
7661 /* Like ppc_elf_link_hash_table_create, but overrides
7662 appropriately for VxWorks. */
7663 static struct bfd_link_hash_table *
7664 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7665 {
7666 struct bfd_link_hash_table *ret;
7667
7668 ret = ppc_elf_link_hash_table_create (abfd);
7669 if (ret)
7670 {
7671 struct ppc_elf_link_hash_table *htab
7672 = (struct ppc_elf_link_hash_table *)ret;
7673 htab->is_vxworks = 1;
7674 htab->plt_type = PLT_VXWORKS;
7675 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7676 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7677 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7678 }
7679 return ret;
7680 }
7681
7682 /* Tweak magic VxWorks symbols as they are loaded. */
7683 static bfd_boolean
7684 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7685 struct bfd_link_info *info,
7686 Elf_Internal_Sym *sym,
7687 const char **namep ATTRIBUTE_UNUSED,
7688 flagword *flagsp ATTRIBUTE_UNUSED,
7689 asection **secp,
7690 bfd_vma *valp)
7691 {
7692 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7693 valp))
7694 return FALSE;
7695
7696 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7697 }
7698
7699 static void
7700 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7701 {
7702 ppc_elf_final_write_processing(abfd, linker);
7703 elf_vxworks_final_write_processing(abfd, linker);
7704 }
7705
7706 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7707 define it. */
7708 #undef elf_backend_want_plt_sym
7709 #define elf_backend_want_plt_sym 1
7710 #undef elf_backend_want_got_plt
7711 #define elf_backend_want_got_plt 1
7712 #undef elf_backend_got_symbol_offset
7713 #define elf_backend_got_symbol_offset 0
7714 #undef elf_backend_plt_not_loaded
7715 #define elf_backend_plt_not_loaded 0
7716 #undef elf_backend_plt_readonly
7717 #define elf_backend_plt_readonly 1
7718 #undef elf_backend_got_header_size
7719 #define elf_backend_got_header_size 12
7720
7721 #undef bfd_elf32_bfd_link_hash_table_create
7722 #define bfd_elf32_bfd_link_hash_table_create \
7723 ppc_elf_vxworks_link_hash_table_create
7724 #undef elf_backend_add_symbol_hook
7725 #define elf_backend_add_symbol_hook \
7726 ppc_elf_vxworks_add_symbol_hook
7727 #undef elf_backend_link_output_symbol_hook
7728 #define elf_backend_link_output_symbol_hook \
7729 elf_vxworks_link_output_symbol_hook
7730 #undef elf_backend_final_write_processing
7731 #define elf_backend_final_write_processing \
7732 ppc_elf_vxworks_final_write_processing
7733 #undef elf_backend_get_sec_type_attr
7734 #define elf_backend_get_sec_type_attr \
7735 ppc_elf_vxworks_get_sec_type_attr
7736 #undef elf_backend_emit_relocs
7737 #define elf_backend_emit_relocs \
7738 elf_vxworks_emit_relocs
7739
7740 #undef elf32_bed
7741 #define elf32_bed ppc_elf_vxworks_bed
7742
7743 #include "elf32-target.h"
GDB Binutils - Deliverables
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