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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, 2008 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 #define is_ppc_elf(bfd) \
1740 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1741 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1742
1743 /* Override the generic function because we store some extras. */
1744
1745 static bfd_boolean
1746 ppc_elf_mkobject (bfd *abfd)
1747 {
1748 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1749 PPC32_ELF_TDATA);
1750 }
1751
1752 /* Fix bad default arch selected for a 32 bit input bfd when the
1753 default is 64 bit. */
1754
1755 static bfd_boolean
1756 ppc_elf_object_p (bfd *abfd)
1757 {
1758 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1759 {
1760 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1761
1762 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1763 {
1764 /* Relies on arch after 64 bit default being 32 bit default. */
1765 abfd->arch_info = abfd->arch_info->next;
1766 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1767 }
1768 }
1769 return TRUE;
1770 }
1771
1772 /* Function to set whether a module needs the -mrelocatable bit set. */
1773
1774 static bfd_boolean
1775 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1776 {
1777 BFD_ASSERT (!elf_flags_init (abfd)
1778 || elf_elfheader (abfd)->e_flags == flags);
1779
1780 elf_elfheader (abfd)->e_flags = flags;
1781 elf_flags_init (abfd) = TRUE;
1782 return TRUE;
1783 }
1784
1785 /* Support for core dump NOTE sections. */
1786
1787 static bfd_boolean
1788 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1789 {
1790 int offset;
1791 unsigned int size;
1792
1793 switch (note->descsz)
1794 {
1795 default:
1796 return FALSE;
1797
1798 case 268: /* Linux/PPC. */
1799 /* pr_cursig */
1800 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1801
1802 /* pr_pid */
1803 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1804
1805 /* pr_reg */
1806 offset = 72;
1807 size = 192;
1808
1809 break;
1810 }
1811
1812 /* Make a ".reg/999" section. */
1813 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1814 size, note->descpos + offset);
1815 }
1816
1817 static bfd_boolean
1818 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1819 {
1820 switch (note->descsz)
1821 {
1822 default:
1823 return FALSE;
1824
1825 case 128: /* Linux/PPC elf_prpsinfo. */
1826 elf_tdata (abfd)->core_program
1827 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1828 elf_tdata (abfd)->core_command
1829 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1830 }
1831
1832 /* Note that for some reason, a spurious space is tacked
1833 onto the end of the args in some (at least one anyway)
1834 implementations, so strip it off if it exists. */
1835
1836 {
1837 char *command = elf_tdata (abfd)->core_command;
1838 int n = strlen (command);
1839
1840 if (0 < n && command[n - 1] == ' ')
1841 command[n - 1] = '\0';
1842 }
1843
1844 return TRUE;
1845 }
1846
1847 static char *
1848 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1849 {
1850 switch (note_type)
1851 {
1852 default:
1853 return NULL;
1854
1855 case NT_PRPSINFO:
1856 {
1857 char data[128];
1858 va_list ap;
1859
1860 va_start (ap, note_type);
1861 memset (data, 0, 32);
1862 strncpy (data + 32, va_arg (ap, const char *), 16);
1863 strncpy (data + 48, va_arg (ap, const char *), 80);
1864 va_end (ap);
1865 return elfcore_write_note (abfd, buf, bufsiz,
1866 "CORE", note_type, data, sizeof (data));
1867 }
1868
1869 case NT_PRSTATUS:
1870 {
1871 char data[268];
1872 va_list ap;
1873 long pid;
1874 int cursig;
1875 const void *greg;
1876
1877 va_start (ap, note_type);
1878 memset (data, 0, 72);
1879 pid = va_arg (ap, long);
1880 bfd_put_32 (abfd, pid, data + 24);
1881 cursig = va_arg (ap, int);
1882 bfd_put_16 (abfd, cursig, data + 12);
1883 greg = va_arg (ap, const void *);
1884 memcpy (data + 72, greg, 192);
1885 memset (data + 264, 0, 4);
1886 va_end (ap);
1887 return elfcore_write_note (abfd, buf, bufsiz,
1888 "CORE", note_type, data, sizeof (data));
1889 }
1890 }
1891 }
1892
1893 /* Return address for Ith PLT stub in section PLT, for relocation REL
1894 or (bfd_vma) -1 if it should not be included. */
1895
1896 static bfd_vma
1897 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1898 const asection *plt ATTRIBUTE_UNUSED,
1899 const arelent *rel)
1900 {
1901 return rel->address;
1902 }
1903
1904 /* Handle a PowerPC specific section when reading an object file. This
1905 is called when bfd_section_from_shdr finds a section with an unknown
1906 type. */
1907
1908 static bfd_boolean
1909 ppc_elf_section_from_shdr (bfd *abfd,
1910 Elf_Internal_Shdr *hdr,
1911 const char *name,
1912 int shindex)
1913 {
1914 asection *newsect;
1915 flagword flags;
1916
1917 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1918 return FALSE;
1919
1920 newsect = hdr->bfd_section;
1921 flags = bfd_get_section_flags (abfd, newsect);
1922 if (hdr->sh_flags & SHF_EXCLUDE)
1923 flags |= SEC_EXCLUDE;
1924
1925 if (hdr->sh_type == SHT_ORDERED)
1926 flags |= SEC_SORT_ENTRIES;
1927
1928 bfd_set_section_flags (abfd, newsect, flags);
1929 return TRUE;
1930 }
1931
1932 /* Set up any other section flags and such that may be necessary. */
1933
1934 static bfd_boolean
1935 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1936 Elf_Internal_Shdr *shdr,
1937 asection *asect)
1938 {
1939 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1940 shdr->sh_flags |= SHF_EXCLUDE;
1941
1942 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1943 shdr->sh_type = SHT_ORDERED;
1944
1945 return TRUE;
1946 }
1947
1948 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1949 need to bump up the number of section headers. */
1950
1951 static int
1952 ppc_elf_additional_program_headers (bfd *abfd,
1953 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1954 {
1955 asection *s;
1956 int ret = 0;
1957
1958 s = bfd_get_section_by_name (abfd, ".sbss2");
1959 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1960 ++ret;
1961
1962 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1963 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1964 ++ret;
1965
1966 return ret;
1967 }
1968
1969 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1970 .PPC.EMB.sbss0 a normal section, and not a bss section so
1971 that the linker doesn't crater when trying to make more than
1972 2 sections. */
1973
1974 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1975 {
1976 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1977 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1978 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1979 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1980 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1981 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1982 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1983 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1984 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1985 { NULL, 0, 0, 0, 0 }
1986 };
1987
1988 /* This is what we want for new plt/got. */
1989 static struct bfd_elf_special_section ppc_alt_plt =
1990 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1991
1992 static const struct bfd_elf_special_section *
1993 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1994 {
1995 const struct bfd_elf_special_section *ssect;
1996
1997 /* See if this is one of the special sections. */
1998 if (sec->name == NULL)
1999 return NULL;
2000
2001 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2002 sec->use_rela_p);
2003 if (ssect != NULL)
2004 {
2005 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2006 ssect = &ppc_alt_plt;
2007 return ssect;
2008 }
2009
2010 return _bfd_elf_get_sec_type_attr (abfd, sec);
2011 }
2012 \f
2013 /* Very simple linked list structure for recording apuinfo values. */
2014 typedef struct apuinfo_list
2015 {
2016 struct apuinfo_list *next;
2017 unsigned long value;
2018 }
2019 apuinfo_list;
2020
2021 static apuinfo_list *head;
2022
2023
2024 static void
2025 apuinfo_list_init (void)
2026 {
2027 head = NULL;
2028 }
2029
2030 static void
2031 apuinfo_list_add (unsigned long value)
2032 {
2033 apuinfo_list *entry = head;
2034
2035 while (entry != NULL)
2036 {
2037 if (entry->value == value)
2038 return;
2039 entry = entry->next;
2040 }
2041
2042 entry = bfd_malloc (sizeof (* entry));
2043 if (entry == NULL)
2044 return;
2045
2046 entry->value = value;
2047 entry->next = head;
2048 head = entry;
2049 }
2050
2051 static unsigned
2052 apuinfo_list_length (void)
2053 {
2054 apuinfo_list *entry;
2055 unsigned long count;
2056
2057 for (entry = head, count = 0;
2058 entry;
2059 entry = entry->next)
2060 ++ count;
2061
2062 return count;
2063 }
2064
2065 static inline unsigned long
2066 apuinfo_list_element (unsigned long number)
2067 {
2068 apuinfo_list * entry;
2069
2070 for (entry = head;
2071 entry && number --;
2072 entry = entry->next)
2073 ;
2074
2075 return entry ? entry->value : 0;
2076 }
2077
2078 static void
2079 apuinfo_list_finish (void)
2080 {
2081 apuinfo_list *entry;
2082
2083 for (entry = head; entry;)
2084 {
2085 apuinfo_list *next = entry->next;
2086 free (entry);
2087 entry = next;
2088 }
2089
2090 head = NULL;
2091 }
2092
2093 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2094 #define APUINFO_LABEL "APUinfo"
2095
2096 /* Scan the input BFDs and create a linked list of
2097 the APUinfo values that will need to be emitted. */
2098
2099 static void
2100 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2101 {
2102 bfd *ibfd;
2103 asection *asec;
2104 char *buffer;
2105 unsigned num_input_sections;
2106 bfd_size_type output_section_size;
2107 unsigned i;
2108 unsigned num_entries;
2109 unsigned long offset;
2110 unsigned long length;
2111 const char *error_message = NULL;
2112
2113 if (link_info == NULL)
2114 return;
2115
2116 /* Scan the input bfds, looking for apuinfo sections. */
2117 num_input_sections = 0;
2118 output_section_size = 0;
2119
2120 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2121 {
2122 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2123 if (asec)
2124 {
2125 ++ num_input_sections;
2126 output_section_size += asec->size;
2127 }
2128 }
2129
2130 /* We need at least one input sections
2131 in order to make merging worthwhile. */
2132 if (num_input_sections < 1)
2133 return;
2134
2135 /* Just make sure that the output section exists as well. */
2136 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2137 if (asec == NULL)
2138 return;
2139
2140 /* Allocate a buffer for the contents of the input sections. */
2141 buffer = bfd_malloc (output_section_size);
2142 if (buffer == NULL)
2143 return;
2144
2145 offset = 0;
2146 apuinfo_list_init ();
2147
2148 /* Read in the input sections contents. */
2149 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2150 {
2151 unsigned long datum;
2152 char *ptr;
2153
2154 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2155 if (asec == NULL)
2156 continue;
2157
2158 length = asec->size;
2159 if (length < 24)
2160 {
2161 error_message = _("corrupt or empty %s section in %B");
2162 goto fail;
2163 }
2164
2165 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2166 || (bfd_bread (buffer + offset, length, ibfd) != length))
2167 {
2168 error_message = _("unable to read in %s section from %B");
2169 goto fail;
2170 }
2171
2172 /* Process the contents of the section. */
2173 ptr = buffer + offset;
2174 error_message = _("corrupt %s section in %B");
2175
2176 /* Verify the contents of the header. Note - we have to
2177 extract the values this way in order to allow for a
2178 host whose endian-ness is different from the target. */
2179 datum = bfd_get_32 (ibfd, ptr);
2180 if (datum != sizeof APUINFO_LABEL)
2181 goto fail;
2182
2183 datum = bfd_get_32 (ibfd, ptr + 8);
2184 if (datum != 0x2)
2185 goto fail;
2186
2187 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2188 goto fail;
2189
2190 /* Get the number of bytes used for apuinfo entries. */
2191 datum = bfd_get_32 (ibfd, ptr + 4);
2192 if (datum + 20 != length)
2193 goto fail;
2194
2195 /* Make sure that we do not run off the end of the section. */
2196 if (offset + length > output_section_size)
2197 goto fail;
2198
2199 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2200 for (i = 0; i < datum; i += 4)
2201 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2202
2203 /* Update the offset. */
2204 offset += length;
2205 }
2206
2207 error_message = NULL;
2208
2209 /* Compute the size of the output section. */
2210 num_entries = apuinfo_list_length ();
2211 output_section_size = 20 + num_entries * 4;
2212
2213 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2214
2215 if (! bfd_set_section_size (abfd, asec, output_section_size))
2216 ibfd = abfd,
2217 error_message = _("warning: unable to set size of %s section in %B");
2218
2219 fail:
2220 free (buffer);
2221
2222 if (error_message)
2223 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2224 }
2225
2226 /* Prevent the output section from accumulating the input sections'
2227 contents. We have already stored this in our linked list structure. */
2228
2229 static bfd_boolean
2230 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2231 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2232 asection *asec,
2233 bfd_byte *contents ATTRIBUTE_UNUSED)
2234 {
2235 return (apuinfo_list_length ()
2236 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2237 }
2238
2239 /* Finally we can generate the output section. */
2240
2241 static void
2242 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2243 {
2244 bfd_byte *buffer;
2245 asection *asec;
2246 unsigned i;
2247 unsigned num_entries;
2248 bfd_size_type length;
2249
2250 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2251 if (asec == NULL)
2252 return;
2253
2254 if (apuinfo_list_length () == 0)
2255 return;
2256
2257 length = asec->size;
2258 if (length < 20)
2259 return;
2260
2261 buffer = bfd_malloc (length);
2262 if (buffer == NULL)
2263 {
2264 (*_bfd_error_handler)
2265 (_("failed to allocate space for new APUinfo section."));
2266 return;
2267 }
2268
2269 /* Create the apuinfo header. */
2270 num_entries = apuinfo_list_length ();
2271 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2272 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2273 bfd_put_32 (abfd, 0x2, buffer + 8);
2274 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2275
2276 length = 20;
2277 for (i = 0; i < num_entries; i++)
2278 {
2279 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2280 length += 4;
2281 }
2282
2283 if (length != asec->size)
2284 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2285
2286 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2287 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2288
2289 free (buffer);
2290
2291 apuinfo_list_finish ();
2292 }
2293 \f
2294 /* The following functions are specific to the ELF linker, while
2295 functions above are used generally. They appear in this file more
2296 or less in the order in which they are called. eg.
2297 ppc_elf_check_relocs is called early in the link process,
2298 ppc_elf_finish_dynamic_sections is one of the last functions
2299 called. */
2300
2301 /* The PPC linker needs to keep track of the number of relocs that it
2302 decides to copy as dynamic relocs in check_relocs for each symbol.
2303 This is so that it can later discard them if they are found to be
2304 unnecessary. We store the information in a field extending the
2305 regular ELF linker hash table. */
2306
2307 struct ppc_elf_dyn_relocs
2308 {
2309 struct ppc_elf_dyn_relocs *next;
2310
2311 /* The input section of the reloc. */
2312 asection *sec;
2313
2314 /* Total number of relocs copied for the input section. */
2315 bfd_size_type count;
2316
2317 /* Number of pc-relative relocs copied for the input section. */
2318 bfd_size_type pc_count;
2319 };
2320
2321 /* Track PLT entries needed for a given symbol. We might need more
2322 than one glink entry per symbol. */
2323 struct plt_entry
2324 {
2325 struct plt_entry *next;
2326
2327 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2328 This field stores the offset into .got2 used to initialise the
2329 GOT pointer reg. It will always be at least 32768 (and for
2330 current gcc this is the only offset used). */
2331 bfd_vma addend;
2332
2333 /* The .got2 section. */
2334 asection *sec;
2335
2336 /* PLT refcount or offset. */
2337 union
2338 {
2339 bfd_signed_vma refcount;
2340 bfd_vma offset;
2341 } plt;
2342
2343 /* .glink stub offset. */
2344 bfd_vma glink_offset;
2345 };
2346
2347 /* Of those relocs that might be copied as dynamic relocs, this macro
2348 selects those that must be copied when linking a shared library,
2349 even when the symbol is local. */
2350
2351 #define MUST_BE_DYN_RELOC(RTYPE) \
2352 ((RTYPE) != R_PPC_REL24 \
2353 && (RTYPE) != R_PPC_REL14 \
2354 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2355 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2356 && (RTYPE) != R_PPC_REL32)
2357
2358 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2359 copying dynamic variables from a shared lib into an app's dynbss
2360 section, and instead use a dynamic relocation to point into the
2361 shared lib. */
2362 #define ELIMINATE_COPY_RELOCS 1
2363
2364 /* PPC ELF linker hash entry. */
2365
2366 struct ppc_elf_link_hash_entry
2367 {
2368 struct elf_link_hash_entry elf;
2369
2370 /* If this symbol is used in the linker created sections, the processor
2371 specific backend uses this field to map the field into the offset
2372 from the beginning of the section. */
2373 elf_linker_section_pointers_t *linker_section_pointer;
2374
2375 /* Track dynamic relocs copied for this symbol. */
2376 struct ppc_elf_dyn_relocs *dyn_relocs;
2377
2378 /* Contexts in which symbol is used in the GOT (or TOC).
2379 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2380 corresponding relocs are encountered during check_relocs.
2381 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2382 indicate the corresponding GOT entry type is not needed. */
2383 #define TLS_GD 1 /* GD reloc. */
2384 #define TLS_LD 2 /* LD reloc. */
2385 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2386 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2387 #define TLS_TLS 16 /* Any TLS reloc. */
2388 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2389 char tls_mask;
2390
2391 /* Nonzero if we have seen a small data relocation referring to this
2392 symbol. */
2393 unsigned char has_sda_refs;
2394 };
2395
2396 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2397
2398 /* PPC ELF linker hash table. */
2399
2400 struct ppc_elf_link_hash_table
2401 {
2402 struct elf_link_hash_table elf;
2403
2404 /* Short-cuts to get to dynamic linker sections. */
2405 asection *got;
2406 asection *relgot;
2407 asection *glink;
2408 asection *plt;
2409 asection *relplt;
2410 asection *dynbss;
2411 asection *relbss;
2412 asection *dynsbss;
2413 asection *relsbss;
2414 elf_linker_section_t sdata[2];
2415 asection *sbss;
2416
2417 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2418 asection *srelplt2;
2419
2420 /* The .got.plt section (VxWorks only)*/
2421 asection *sgotplt;
2422
2423 /* Shortcut to .__tls_get_addr. */
2424 struct elf_link_hash_entry *tls_get_addr;
2425
2426 /* The bfd that forced an old-style PLT. */
2427 bfd *old_bfd;
2428
2429 /* TLS local dynamic got entry handling. */
2430 union {
2431 bfd_signed_vma refcount;
2432 bfd_vma offset;
2433 } tlsld_got;
2434
2435 /* Offset of PltResolve function in glink. */
2436 bfd_vma glink_pltresolve;
2437
2438 /* Size of reserved GOT entries. */
2439 unsigned int got_header_size;
2440 /* Non-zero if allocating the header left a gap. */
2441 unsigned int got_gap;
2442
2443 /* The type of PLT we have chosen to use. */
2444 enum ppc_elf_plt_type plt_type;
2445
2446 /* Set if we should emit symbols for stubs. */
2447 unsigned int emit_stub_syms:1;
2448
2449 /* True if the target system is VxWorks. */
2450 unsigned int is_vxworks:1;
2451
2452 /* The size of PLT entries. */
2453 int plt_entry_size;
2454 /* The distance between adjacent PLT slots. */
2455 int plt_slot_size;
2456 /* The size of the first PLT entry. */
2457 int plt_initial_entry_size;
2458
2459 /* Small local sym to section mapping cache. */
2460 struct sym_sec_cache sym_sec;
2461 };
2462
2463 /* Get the PPC ELF linker hash table from a link_info structure. */
2464
2465 #define ppc_elf_hash_table(p) \
2466 ((struct ppc_elf_link_hash_table *) (p)->hash)
2467
2468 /* Create an entry in a PPC ELF linker hash table. */
2469
2470 static struct bfd_hash_entry *
2471 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2472 struct bfd_hash_table *table,
2473 const char *string)
2474 {
2475 /* Allocate the structure if it has not already been allocated by a
2476 subclass. */
2477 if (entry == NULL)
2478 {
2479 entry = bfd_hash_allocate (table,
2480 sizeof (struct ppc_elf_link_hash_entry));
2481 if (entry == NULL)
2482 return entry;
2483 }
2484
2485 /* Call the allocation method of the superclass. */
2486 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2487 if (entry != NULL)
2488 {
2489 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2490 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2491 ppc_elf_hash_entry (entry)->tls_mask = 0;
2492 }
2493
2494 return entry;
2495 }
2496
2497 /* Create a PPC ELF linker hash table. */
2498
2499 static struct bfd_link_hash_table *
2500 ppc_elf_link_hash_table_create (bfd *abfd)
2501 {
2502 struct ppc_elf_link_hash_table *ret;
2503
2504 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2505 if (ret == NULL)
2506 return NULL;
2507
2508 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2509 ppc_elf_link_hash_newfunc,
2510 sizeof (struct ppc_elf_link_hash_entry)))
2511 {
2512 free (ret);
2513 return NULL;
2514 }
2515
2516 ret->elf.init_plt_refcount.refcount = 0;
2517 ret->elf.init_plt_refcount.glist = NULL;
2518 ret->elf.init_plt_offset.offset = 0;
2519 ret->elf.init_plt_offset.glist = NULL;
2520
2521 ret->sdata[0].name = ".sdata";
2522 ret->sdata[0].sym_name = "_SDA_BASE_";
2523 ret->sdata[0].bss_name = ".sbss";
2524
2525 ret->sdata[1].name = ".sdata2";
2526 ret->sdata[1].sym_name = "_SDA2_BASE_";
2527 ret->sdata[1].bss_name = ".sbss2";
2528
2529 ret->plt_entry_size = 12;
2530 ret->plt_slot_size = 8;
2531 ret->plt_initial_entry_size = 72;
2532
2533 return &ret->elf.root;
2534 }
2535
2536 /* Create .got and the related sections. */
2537
2538 static bfd_boolean
2539 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2540 {
2541 struct ppc_elf_link_hash_table *htab;
2542 asection *s;
2543 flagword flags;
2544
2545 if (!_bfd_elf_create_got_section (abfd, info))
2546 return FALSE;
2547
2548 htab = ppc_elf_hash_table (info);
2549 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2550 if (s == NULL)
2551 abort ();
2552
2553 if (htab->is_vxworks)
2554 {
2555 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2556 if (!htab->sgotplt)
2557 abort ();
2558 }
2559 else
2560 {
2561 /* The powerpc .got has a blrl instruction in it. Mark it
2562 executable. */
2563 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2564 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2565 if (!bfd_set_section_flags (abfd, s, flags))
2566 return FALSE;
2567 }
2568
2569 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2570 | SEC_LINKER_CREATED | SEC_READONLY);
2571 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2572 if (!htab->relgot
2573 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2574 return FALSE;
2575
2576 return TRUE;
2577 }
2578
2579 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2580 to output sections (just like _bfd_elf_create_dynamic_sections has
2581 to create .dynbss and .rela.bss). */
2582
2583 static bfd_boolean
2584 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2585 {
2586 struct ppc_elf_link_hash_table *htab;
2587 asection *s;
2588 flagword flags;
2589
2590 htab = ppc_elf_hash_table (info);
2591
2592 if (htab->got == NULL
2593 && !ppc_elf_create_got (abfd, info))
2594 return FALSE;
2595
2596 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2597 return FALSE;
2598
2599 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2600 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2601
2602 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2603 htab->glink = s;
2604 if (s == NULL
2605 || !bfd_set_section_alignment (abfd, s, 4))
2606 return FALSE;
2607
2608 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2609 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2610 SEC_ALLOC | SEC_LINKER_CREATED);
2611 htab->dynsbss = s;
2612 if (s == NULL)
2613 return FALSE;
2614
2615 if (! info->shared)
2616 {
2617 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2618 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2619 htab->relsbss = s;
2620 if (s == NULL
2621 || ! bfd_set_section_alignment (abfd, s, 2))
2622 return FALSE;
2623 }
2624
2625 if (htab->is_vxworks
2626 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2627 return FALSE;
2628
2629 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2630 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2631 if (s == NULL)
2632 abort ();
2633
2634 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2635 if (htab->plt_type == PLT_VXWORKS)
2636 /* The VxWorks PLT is a loaded section with contents. */
2637 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2638 return bfd_set_section_flags (abfd, s, flags);
2639 }
2640
2641 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2642
2643 static void
2644 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2645 struct elf_link_hash_entry *dir,
2646 struct elf_link_hash_entry *ind)
2647 {
2648 struct ppc_elf_link_hash_entry *edir, *eind;
2649
2650 edir = (struct ppc_elf_link_hash_entry *) dir;
2651 eind = (struct ppc_elf_link_hash_entry *) ind;
2652
2653 if (eind->dyn_relocs != NULL)
2654 {
2655 if (edir->dyn_relocs != NULL)
2656 {
2657 struct ppc_elf_dyn_relocs **pp;
2658 struct ppc_elf_dyn_relocs *p;
2659
2660 /* Add reloc counts against the indirect sym to the direct sym
2661 list. Merge any entries against the same section. */
2662 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2663 {
2664 struct ppc_elf_dyn_relocs *q;
2665
2666 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2667 if (q->sec == p->sec)
2668 {
2669 q->pc_count += p->pc_count;
2670 q->count += p->count;
2671 *pp = p->next;
2672 break;
2673 }
2674 if (q == NULL)
2675 pp = &p->next;
2676 }
2677 *pp = edir->dyn_relocs;
2678 }
2679
2680 edir->dyn_relocs = eind->dyn_relocs;
2681 eind->dyn_relocs = NULL;
2682 }
2683
2684 edir->tls_mask |= eind->tls_mask;
2685 edir->has_sda_refs |= eind->has_sda_refs;
2686
2687 /* If called to transfer flags for a weakdef during processing
2688 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2689 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2690 if (!(ELIMINATE_COPY_RELOCS
2691 && eind->elf.root.type != bfd_link_hash_indirect
2692 && edir->elf.dynamic_adjusted))
2693 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2694
2695 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2696 edir->elf.ref_regular |= eind->elf.ref_regular;
2697 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2698 edir->elf.needs_plt |= eind->elf.needs_plt;
2699 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2700
2701 /* If we were called to copy over info for a weak sym, that's all. */
2702 if (eind->elf.root.type != bfd_link_hash_indirect)
2703 return;
2704
2705 /* Copy over the GOT refcount entries that we may have already seen to
2706 the symbol which just became indirect. */
2707 edir->elf.got.refcount += eind->elf.got.refcount;
2708 eind->elf.got.refcount = 0;
2709
2710 /* And plt entries. */
2711 if (eind->elf.plt.plist != NULL)
2712 {
2713 if (edir->elf.plt.plist != NULL)
2714 {
2715 struct plt_entry **entp;
2716 struct plt_entry *ent;
2717
2718 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2719 {
2720 struct plt_entry *dent;
2721
2722 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2723 if (dent->sec == ent->sec && dent->addend == ent->addend)
2724 {
2725 dent->plt.refcount += ent->plt.refcount;
2726 *entp = ent->next;
2727 break;
2728 }
2729 if (dent == NULL)
2730 entp = &ent->next;
2731 }
2732 *entp = edir->elf.plt.plist;
2733 }
2734
2735 edir->elf.plt.plist = eind->elf.plt.plist;
2736 eind->elf.plt.plist = NULL;
2737 }
2738
2739 if (eind->elf.dynindx != -1)
2740 {
2741 if (edir->elf.dynindx != -1)
2742 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2743 edir->elf.dynstr_index);
2744 edir->elf.dynindx = eind->elf.dynindx;
2745 edir->elf.dynstr_index = eind->elf.dynstr_index;
2746 eind->elf.dynindx = -1;
2747 eind->elf.dynstr_index = 0;
2748 }
2749 }
2750
2751 /* Hook called by the linker routine which adds symbols from an object
2752 file. We use it to put .comm items in .sbss, and not .bss. */
2753
2754 static bfd_boolean
2755 ppc_elf_add_symbol_hook (bfd *abfd,
2756 struct bfd_link_info *info,
2757 Elf_Internal_Sym *sym,
2758 const char **namep ATTRIBUTE_UNUSED,
2759 flagword *flagsp ATTRIBUTE_UNUSED,
2760 asection **secp,
2761 bfd_vma *valp)
2762 {
2763 if (sym->st_shndx == SHN_COMMON
2764 && !info->relocatable
2765 && is_ppc_elf (info->output_bfd)
2766 && sym->st_size <= elf_gp_size (abfd))
2767 {
2768 /* Common symbols less than or equal to -G nn bytes are automatically
2769 put into .sbss. */
2770 struct ppc_elf_link_hash_table *htab;
2771
2772 htab = ppc_elf_hash_table (info);
2773 if (htab->sbss == NULL)
2774 {
2775 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2776
2777 if (!htab->elf.dynobj)
2778 htab->elf.dynobj = abfd;
2779
2780 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2781 ".sbss",
2782 flags);
2783 if (htab->sbss == NULL)
2784 return FALSE;
2785 }
2786
2787 *secp = htab->sbss;
2788 *valp = sym->st_size;
2789 }
2790
2791 return TRUE;
2792 }
2793 \f
2794 static bfd_boolean
2795 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2796 elf_linker_section_t *lsect)
2797 {
2798 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2799 TRUE, FALSE, TRUE);
2800 if (lsect->sym == NULL)
2801 return FALSE;
2802 if (lsect->sym->root.type == bfd_link_hash_new)
2803 lsect->sym->non_elf = 0;
2804 lsect->sym->ref_regular = 1;
2805 return TRUE;
2806 }
2807
2808 /* Create a special linker section. */
2809
2810 static bfd_boolean
2811 ppc_elf_create_linker_section (bfd *abfd,
2812 struct bfd_link_info *info,
2813 flagword flags,
2814 elf_linker_section_t *lsect)
2815 {
2816 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2817 asection *s;
2818
2819 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2820 | SEC_LINKER_CREATED);
2821
2822 /* Record the first bfd that needs the special sections. */
2823 if (!htab->elf.dynobj)
2824 htab->elf.dynobj = abfd;
2825
2826 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2827 lsect->name,
2828 flags);
2829 if (s == NULL
2830 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2831 return FALSE;
2832 lsect->section = s;
2833
2834 return create_sdata_sym (htab, lsect);
2835 }
2836
2837 /* Find a linker generated pointer with a given addend and type. */
2838
2839 static elf_linker_section_pointers_t *
2840 elf_find_pointer_linker_section
2841 (elf_linker_section_pointers_t *linker_pointers,
2842 bfd_vma addend,
2843 elf_linker_section_t *lsect)
2844 {
2845 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2846 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2847 return linker_pointers;
2848
2849 return NULL;
2850 }
2851
2852 /* Allocate a pointer to live in a linker created section. */
2853
2854 static bfd_boolean
2855 elf_create_pointer_linker_section (bfd *abfd,
2856 elf_linker_section_t *lsect,
2857 struct elf_link_hash_entry *h,
2858 const Elf_Internal_Rela *rel)
2859 {
2860 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2861 elf_linker_section_pointers_t *linker_section_ptr;
2862 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2863 bfd_size_type amt;
2864
2865 BFD_ASSERT (lsect != NULL);
2866
2867 /* Is this a global symbol? */
2868 if (h != NULL)
2869 {
2870 struct ppc_elf_link_hash_entry *eh;
2871
2872 /* Has this symbol already been allocated? If so, our work is done. */
2873 eh = (struct ppc_elf_link_hash_entry *) h;
2874 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2875 rel->r_addend,
2876 lsect))
2877 return TRUE;
2878
2879 ptr_linker_section_ptr = &eh->linker_section_pointer;
2880 }
2881 else
2882 {
2883 BFD_ASSERT (is_ppc_elf (abfd));
2884
2885 /* Allocation of a pointer to a local symbol. */
2886 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2887
2888 /* Allocate a table to hold the local symbols if first time. */
2889 if (!ptr)
2890 {
2891 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
2892
2893 amt = num_symbols;
2894 amt *= sizeof (elf_linker_section_pointers_t *);
2895 ptr = bfd_zalloc (abfd, amt);
2896
2897 if (!ptr)
2898 return FALSE;
2899
2900 elf_local_ptr_offsets (abfd) = ptr;
2901 }
2902
2903 /* Has this symbol already been allocated? If so, our work is done. */
2904 if (elf_find_pointer_linker_section (ptr[r_symndx],
2905 rel->r_addend,
2906 lsect))
2907 return TRUE;
2908
2909 ptr_linker_section_ptr = &ptr[r_symndx];
2910 }
2911
2912 /* Allocate space for a pointer in the linker section, and allocate
2913 a new pointer record from internal memory. */
2914 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2915 amt = sizeof (elf_linker_section_pointers_t);
2916 linker_section_ptr = bfd_alloc (abfd, amt);
2917
2918 if (!linker_section_ptr)
2919 return FALSE;
2920
2921 linker_section_ptr->next = *ptr_linker_section_ptr;
2922 linker_section_ptr->addend = rel->r_addend;
2923 linker_section_ptr->lsect = lsect;
2924 *ptr_linker_section_ptr = linker_section_ptr;
2925
2926 linker_section_ptr->offset = lsect->section->size;
2927 lsect->section->size += 4;
2928
2929 #ifdef DEBUG
2930 fprintf (stderr,
2931 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2932 lsect->name, (long) linker_section_ptr->offset,
2933 (long) lsect->section->size);
2934 #endif
2935
2936 return TRUE;
2937 }
2938
2939 static bfd_boolean
2940 update_local_sym_info (bfd *abfd,
2941 Elf_Internal_Shdr *symtab_hdr,
2942 unsigned long r_symndx,
2943 int tls_type)
2944 {
2945 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2946 char *local_got_tls_masks;
2947
2948 if (local_got_refcounts == NULL)
2949 {
2950 bfd_size_type size = symtab_hdr->sh_info;
2951
2952 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2953 local_got_refcounts = bfd_zalloc (abfd, size);
2954 if (local_got_refcounts == NULL)
2955 return FALSE;
2956 elf_local_got_refcounts (abfd) = local_got_refcounts;
2957 }
2958
2959 local_got_refcounts[r_symndx] += 1;
2960 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2961 local_got_tls_masks[r_symndx] |= tls_type;
2962 return TRUE;
2963 }
2964
2965 static bfd_boolean
2966 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2967 asection *sec, bfd_vma addend)
2968 {
2969 struct plt_entry *ent;
2970
2971 if (addend < 32768)
2972 sec = NULL;
2973 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2974 if (ent->sec == sec && ent->addend == addend)
2975 break;
2976 if (ent == NULL)
2977 {
2978 bfd_size_type amt = sizeof (*ent);
2979 ent = bfd_alloc (abfd, amt);
2980 if (ent == NULL)
2981 return FALSE;
2982 ent->next = h->plt.plist;
2983 ent->sec = sec;
2984 ent->addend = addend;
2985 ent->plt.refcount = 0;
2986 h->plt.plist = ent;
2987 }
2988 ent->plt.refcount += 1;
2989 return TRUE;
2990 }
2991
2992 static struct plt_entry *
2993 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2994 {
2995 struct plt_entry *ent;
2996
2997 if (addend < 32768)
2998 sec = NULL;
2999 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3000 if (ent->sec == sec && ent->addend == addend)
3001 break;
3002 return ent;
3003 }
3004
3005 static void
3006 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3007 {
3008 (*_bfd_error_handler)
3009 (_("%B: relocation %s cannot be used when making a shared object"),
3010 abfd,
3011 ppc_elf_howto_table[r_type]->name);
3012 bfd_set_error (bfd_error_bad_value);
3013 }
3014
3015 /* Look through the relocs for a section during the first phase, and
3016 allocate space in the global offset table or procedure linkage
3017 table. */
3018
3019 static bfd_boolean
3020 ppc_elf_check_relocs (bfd *abfd,
3021 struct bfd_link_info *info,
3022 asection *sec,
3023 const Elf_Internal_Rela *relocs)
3024 {
3025 struct ppc_elf_link_hash_table *htab;
3026 Elf_Internal_Shdr *symtab_hdr;
3027 struct elf_link_hash_entry **sym_hashes;
3028 const Elf_Internal_Rela *rel;
3029 const Elf_Internal_Rela *rel_end;
3030 asection *got2, *sreloc;
3031
3032 if (info->relocatable)
3033 return TRUE;
3034
3035 /* Don't do anything special with non-loaded, non-alloced sections.
3036 In particular, any relocs in such sections should not affect GOT
3037 and PLT reference counting (ie. we don't allow them to create GOT
3038 or PLT entries), there's no possibility or desire to optimize TLS
3039 relocs, and there's not much point in propagating relocs to shared
3040 libs that the dynamic linker won't relocate. */
3041 if ((sec->flags & SEC_ALLOC) == 0)
3042 return TRUE;
3043
3044 #ifdef DEBUG
3045 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3046 sec, abfd);
3047 #endif
3048
3049 BFD_ASSERT (is_ppc_elf (abfd));
3050
3051 /* Initialize howto table if not already done. */
3052 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3053 ppc_elf_howto_init ();
3054
3055 htab = ppc_elf_hash_table (info);
3056 symtab_hdr = &elf_symtab_hdr (abfd);
3057 sym_hashes = elf_sym_hashes (abfd);
3058 got2 = bfd_get_section_by_name (abfd, ".got2");
3059 sreloc = NULL;
3060
3061 rel_end = relocs + sec->reloc_count;
3062 for (rel = relocs; rel < rel_end; rel++)
3063 {
3064 unsigned long r_symndx;
3065 enum elf_ppc_reloc_type r_type;
3066 struct elf_link_hash_entry *h;
3067 int tls_type = 0;
3068
3069 r_symndx = ELF32_R_SYM (rel->r_info);
3070 if (r_symndx < symtab_hdr->sh_info)
3071 h = NULL;
3072 else
3073 {
3074 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3075 while (h->root.type == bfd_link_hash_indirect
3076 || h->root.type == bfd_link_hash_warning)
3077 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3078 }
3079
3080 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3081 This shows up in particular in an R_PPC_ADDR32 in the eabi
3082 startup code. */
3083 if (h != NULL
3084 && htab->got == NULL
3085 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3086 {
3087 if (htab->elf.dynobj == NULL)
3088 htab->elf.dynobj = abfd;
3089 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3090 return FALSE;
3091 BFD_ASSERT (h == htab->elf.hgot);
3092 }
3093
3094 r_type = ELF32_R_TYPE (rel->r_info);
3095 switch (r_type)
3096 {
3097 case R_PPC_GOT_TLSLD16:
3098 case R_PPC_GOT_TLSLD16_LO:
3099 case R_PPC_GOT_TLSLD16_HI:
3100 case R_PPC_GOT_TLSLD16_HA:
3101 tls_type = TLS_TLS | TLS_LD;
3102 goto dogottls;
3103
3104 case R_PPC_GOT_TLSGD16:
3105 case R_PPC_GOT_TLSGD16_LO:
3106 case R_PPC_GOT_TLSGD16_HI:
3107 case R_PPC_GOT_TLSGD16_HA:
3108 tls_type = TLS_TLS | TLS_GD;
3109 goto dogottls;
3110
3111 case R_PPC_GOT_TPREL16:
3112 case R_PPC_GOT_TPREL16_LO:
3113 case R_PPC_GOT_TPREL16_HI:
3114 case R_PPC_GOT_TPREL16_HA:
3115 if (info->shared)
3116 info->flags |= DF_STATIC_TLS;
3117 tls_type = TLS_TLS | TLS_TPREL;
3118 goto dogottls;
3119
3120 case R_PPC_GOT_DTPREL16:
3121 case R_PPC_GOT_DTPREL16_LO:
3122 case R_PPC_GOT_DTPREL16_HI:
3123 case R_PPC_GOT_DTPREL16_HA:
3124 tls_type = TLS_TLS | TLS_DTPREL;
3125 dogottls:
3126 sec->has_tls_reloc = 1;
3127 /* Fall thru */
3128
3129 /* GOT16 relocations */
3130 case R_PPC_GOT16:
3131 case R_PPC_GOT16_LO:
3132 case R_PPC_GOT16_HI:
3133 case R_PPC_GOT16_HA:
3134 /* This symbol requires a global offset table entry. */
3135 if (htab->got == NULL)
3136 {
3137 if (htab->elf.dynobj == NULL)
3138 htab->elf.dynobj = abfd;
3139 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3140 return FALSE;
3141 }
3142 if (h != NULL)
3143 {
3144 h->got.refcount += 1;
3145 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3146 }
3147 else
3148 /* This is a global offset table entry for a local symbol. */
3149 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3150 return FALSE;
3151 break;
3152
3153 /* Indirect .sdata relocation. */
3154 case R_PPC_EMB_SDAI16:
3155 if (info->shared)
3156 {
3157 bad_shared_reloc (abfd, r_type);
3158 return FALSE;
3159 }
3160 if (htab->sdata[0].section == NULL
3161 && !ppc_elf_create_linker_section (abfd, info, 0,
3162 &htab->sdata[0]))
3163 return FALSE;
3164 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3165 h, rel))
3166 return FALSE;
3167 if (h != NULL)
3168 {
3169 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3170 h->non_got_ref = TRUE;
3171 }
3172 break;
3173
3174 /* Indirect .sdata2 relocation. */
3175 case R_PPC_EMB_SDA2I16:
3176 if (info->shared)
3177 {
3178 bad_shared_reloc (abfd, r_type);
3179 return FALSE;
3180 }
3181 if (htab->sdata[1].section == NULL
3182 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3183 &htab->sdata[1]))
3184 return FALSE;
3185 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3186 h, rel))
3187 return FALSE;
3188 if (h != NULL)
3189 {
3190 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3191 h->non_got_ref = TRUE;
3192 }
3193 break;
3194
3195 case R_PPC_SDAREL16:
3196 if (info->shared)
3197 {
3198 bad_shared_reloc (abfd, r_type);
3199 return FALSE;
3200 }
3201 if (htab->sdata[0].sym == NULL
3202 && !create_sdata_sym (htab, &htab->sdata[0]))
3203 return FALSE;
3204 if (h != NULL)
3205 {
3206 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3207 h->non_got_ref = TRUE;
3208 }
3209 break;
3210
3211 case R_PPC_EMB_SDA2REL:
3212 if (info->shared)
3213 {
3214 bad_shared_reloc (abfd, r_type);
3215 return FALSE;
3216 }
3217 if (htab->sdata[1].sym == NULL
3218 && !create_sdata_sym (htab, &htab->sdata[1]))
3219 return FALSE;
3220 if (h != NULL)
3221 {
3222 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3223 h->non_got_ref = TRUE;
3224 }
3225 break;
3226
3227 case R_PPC_EMB_SDA21:
3228 case R_PPC_EMB_RELSDA:
3229 if (info->shared)
3230 {
3231 bad_shared_reloc (abfd, r_type);
3232 return FALSE;
3233 }
3234 if (htab->sdata[0].sym == NULL
3235 && !create_sdata_sym (htab, &htab->sdata[0]))
3236 return FALSE;
3237 if (htab->sdata[1].sym == NULL
3238 && !create_sdata_sym (htab, &htab->sdata[1]))
3239 return FALSE;
3240 if (h != NULL)
3241 {
3242 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3243 h->non_got_ref = TRUE;
3244 }
3245 break;
3246
3247 case R_PPC_EMB_NADDR32:
3248 case R_PPC_EMB_NADDR16:
3249 case R_PPC_EMB_NADDR16_LO:
3250 case R_PPC_EMB_NADDR16_HI:
3251 case R_PPC_EMB_NADDR16_HA:
3252 if (info->shared)
3253 {
3254 bad_shared_reloc (abfd, r_type);
3255 return FALSE;
3256 }
3257 if (h != NULL)
3258 h->non_got_ref = TRUE;
3259 break;
3260
3261 case R_PPC_PLT32:
3262 case R_PPC_PLTREL24:
3263 case R_PPC_PLTREL32:
3264 case R_PPC_PLT16_LO:
3265 case R_PPC_PLT16_HI:
3266 case R_PPC_PLT16_HA:
3267 #ifdef DEBUG
3268 fprintf (stderr, "Reloc requires a PLT entry\n");
3269 #endif
3270 /* This symbol requires a procedure linkage table entry. We
3271 actually build the entry in finish_dynamic_symbol,
3272 because this might be a case of linking PIC code without
3273 linking in any dynamic objects, in which case we don't
3274 need to generate a procedure linkage table after all. */
3275
3276 if (h == NULL)
3277 {
3278 /* It does not make sense to have a procedure linkage
3279 table entry for a local symbol. */
3280 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3281 "local symbol"),
3282 abfd,
3283 sec,
3284 (long) rel->r_offset,
3285 ppc_elf_howto_table[r_type]->name);
3286 bfd_set_error (bfd_error_bad_value);
3287 return FALSE;
3288 }
3289 else
3290 {
3291 bfd_vma addend = 0;
3292
3293 if (r_type == R_PPC_PLTREL24)
3294 {
3295 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3296 addend = rel->r_addend;
3297 }
3298 h->needs_plt = 1;
3299 if (!update_plt_info (abfd, h, got2, addend))
3300 return FALSE;
3301 }
3302 break;
3303
3304 /* The following relocations don't need to propagate the
3305 relocation if linking a shared object since they are
3306 section relative. */
3307 case R_PPC_SECTOFF:
3308 case R_PPC_SECTOFF_LO:
3309 case R_PPC_SECTOFF_HI:
3310 case R_PPC_SECTOFF_HA:
3311 case R_PPC_DTPREL16:
3312 case R_PPC_DTPREL16_LO:
3313 case R_PPC_DTPREL16_HI:
3314 case R_PPC_DTPREL16_HA:
3315 case R_PPC_TOC16:
3316 break;
3317
3318 case R_PPC_REL16:
3319 case R_PPC_REL16_LO:
3320 case R_PPC_REL16_HI:
3321 case R_PPC_REL16_HA:
3322 ppc_elf_tdata (abfd)->has_rel16 = 1;
3323 break;
3324
3325 /* These are just markers. */
3326 case R_PPC_TLS:
3327 case R_PPC_EMB_MRKREF:
3328 case R_PPC_NONE:
3329 case R_PPC_max:
3330 break;
3331
3332 /* These should only appear in dynamic objects. */
3333 case R_PPC_COPY:
3334 case R_PPC_GLOB_DAT:
3335 case R_PPC_JMP_SLOT:
3336 case R_PPC_RELATIVE:
3337 break;
3338
3339 /* These aren't handled yet. We'll report an error later. */
3340 case R_PPC_ADDR30:
3341 case R_PPC_EMB_RELSEC16:
3342 case R_PPC_EMB_RELST_LO:
3343 case R_PPC_EMB_RELST_HI:
3344 case R_PPC_EMB_RELST_HA:
3345 case R_PPC_EMB_BIT_FLD:
3346 break;
3347
3348 /* This refers only to functions defined in the shared library. */
3349 case R_PPC_LOCAL24PC:
3350 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3351 {
3352 htab->plt_type = PLT_OLD;
3353 htab->old_bfd = abfd;
3354 }
3355 break;
3356
3357 /* This relocation describes the C++ object vtable hierarchy.
3358 Reconstruct it for later use during GC. */
3359 case R_PPC_GNU_VTINHERIT:
3360 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3361 return FALSE;
3362 break;
3363
3364 /* This relocation describes which C++ vtable entries are actually
3365 used. Record for later use during GC. */
3366 case R_PPC_GNU_VTENTRY:
3367 BFD_ASSERT (h != NULL);
3368 if (h != NULL
3369 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3370 return FALSE;
3371 break;
3372
3373 /* We shouldn't really be seeing these. */
3374 case R_PPC_TPREL32:
3375 if (info->shared)
3376 info->flags |= DF_STATIC_TLS;
3377 goto dodyn;
3378
3379 /* Nor these. */
3380 case R_PPC_DTPMOD32:
3381 case R_PPC_DTPREL32:
3382 goto dodyn;
3383
3384 case R_PPC_TPREL16:
3385 case R_PPC_TPREL16_LO:
3386 case R_PPC_TPREL16_HI:
3387 case R_PPC_TPREL16_HA:
3388 if (info->shared)
3389 info->flags |= DF_STATIC_TLS;
3390 goto dodyn;
3391
3392 case R_PPC_REL32:
3393 if (h == NULL
3394 && got2 != NULL
3395 && (sec->flags & SEC_CODE) != 0
3396 && (info->shared || info->pie)
3397 && htab->plt_type == PLT_UNSET)
3398 {
3399 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3400 the start of a function, which assembles to a REL32
3401 reference to .got2. If we detect one of these, then
3402 force the old PLT layout because the linker cannot
3403 reliably deduce the GOT pointer value needed for
3404 PLT call stubs. */
3405 asection *s;
3406
3407 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3408 r_symndx);
3409 if (s == got2)
3410 {
3411 htab->plt_type = PLT_OLD;
3412 htab->old_bfd = abfd;
3413 }
3414 }
3415 if (h == NULL || h == htab->elf.hgot)
3416 break;
3417 /* fall through */
3418
3419 case R_PPC_ADDR32:
3420 case R_PPC_ADDR16:
3421 case R_PPC_ADDR16_LO:
3422 case R_PPC_ADDR16_HI:
3423 case R_PPC_ADDR16_HA:
3424 case R_PPC_UADDR32:
3425 case R_PPC_UADDR16:
3426 if (h != NULL && !info->shared)
3427 {
3428 /* We may need a plt entry if the symbol turns out to be
3429 a function defined in a dynamic object. */
3430 if (!update_plt_info (abfd, h, NULL, 0))
3431 return FALSE;
3432
3433 /* We may need a copy reloc too. */
3434 h->non_got_ref = 1;
3435 h->pointer_equality_needed = 1;
3436 }
3437 goto dodyn;
3438
3439 case R_PPC_REL24:
3440 case R_PPC_REL14:
3441 case R_PPC_REL14_BRTAKEN:
3442 case R_PPC_REL14_BRNTAKEN:
3443 if (h == NULL)
3444 break;
3445 if (h == htab->elf.hgot)
3446 {
3447 if (htab->plt_type == PLT_UNSET)
3448 {
3449 htab->plt_type = PLT_OLD;
3450 htab->old_bfd = abfd;
3451 }
3452 break;
3453 }
3454 /* fall through */
3455
3456 case R_PPC_ADDR24:
3457 case R_PPC_ADDR14:
3458 case R_PPC_ADDR14_BRTAKEN:
3459 case R_PPC_ADDR14_BRNTAKEN:
3460 if (h != NULL && !info->shared)
3461 {
3462 /* We may need a plt entry if the symbol turns out to be
3463 a function defined in a dynamic object. */
3464 if (!update_plt_info (abfd, h, NULL, 0))
3465 return FALSE;
3466 break;
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, *in_attrs;
3605 obj_attribute *out_attr, *out_attrs;
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 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3620 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3621
3622 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3623 non-conflicting ones. */
3624 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3625 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3626 if (in_attr->i != out_attr->i)
3627 {
3628 out_attr->type = 1;
3629 if (out_attr->i == 0)
3630 out_attr->i = in_attr->i;
3631 else if (in_attr->i == 0)
3632 ;
3633 else if (out_attr->i == 1 && in_attr->i == 2)
3634 _bfd_error_handler
3635 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3636 else if (out_attr->i == 2 && in_attr->i == 1)
3637 _bfd_error_handler
3638 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3639 else if (in_attr->i > 2)
3640 _bfd_error_handler
3641 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3642 in_attr->i);
3643 else
3644 _bfd_error_handler
3645 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3646 out_attr->i);
3647 }
3648
3649 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3650 merge non-conflicting ones. */
3651 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3652 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3653 if (in_attr->i != out_attr->i)
3654 {
3655 const char *in_abi = NULL, *out_abi = NULL;
3656
3657 switch (in_attr->i)
3658 {
3659 case 1: in_abi = "generic"; break;
3660 case 2: in_abi = "AltiVec"; break;
3661 case 3: in_abi = "SPE"; break;
3662 }
3663
3664 switch (out_attr->i)
3665 {
3666 case 1: out_abi = "generic"; break;
3667 case 2: out_abi = "AltiVec"; break;
3668 case 3: out_abi = "SPE"; break;
3669 }
3670
3671 out_attr->type = 1;
3672 if (out_attr->i == 0)
3673 out_attr->i = in_attr->i;
3674 else if (in_attr->i == 0)
3675 ;
3676 /* For now, allow generic to transition to AltiVec or SPE
3677 without a warning. If GCC marked files with their stack
3678 alignment and used don't-care markings for files which are
3679 not affected by the vector ABI, we could warn about this
3680 case too. */
3681 else if (out_attr->i == 1)
3682 out_attr->i = in_attr->i;
3683 else if (in_attr->i == 1)
3684 ;
3685 else if (in_abi == NULL)
3686 _bfd_error_handler
3687 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3688 in_attr->i);
3689 else if (out_abi == NULL)
3690 _bfd_error_handler
3691 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3692 in_attr->i);
3693 else
3694 _bfd_error_handler
3695 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3696 ibfd, obfd, in_abi, out_abi);
3697 }
3698
3699 /* Merge Tag_compatibility attributes and any common GNU ones. */
3700 _bfd_elf_merge_object_attributes (ibfd, obfd);
3701
3702 return TRUE;
3703 }
3704
3705 /* Merge backend specific data from an object file to the output
3706 object file when linking. */
3707
3708 static bfd_boolean
3709 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3710 {
3711 flagword old_flags;
3712 flagword new_flags;
3713 bfd_boolean error;
3714
3715 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3716 return TRUE;
3717
3718 /* Check if we have the same endianess. */
3719 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3720 return FALSE;
3721
3722 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3723 return FALSE;
3724
3725 new_flags = elf_elfheader (ibfd)->e_flags;
3726 old_flags = elf_elfheader (obfd)->e_flags;
3727 if (!elf_flags_init (obfd))
3728 {
3729 /* First call, no flags set. */
3730 elf_flags_init (obfd) = TRUE;
3731 elf_elfheader (obfd)->e_flags = new_flags;
3732 }
3733
3734 /* Compatible flags are ok. */
3735 else if (new_flags == old_flags)
3736 ;
3737
3738 /* Incompatible flags. */
3739 else
3740 {
3741 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3742 to be linked with either. */
3743 error = FALSE;
3744 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3745 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3746 {
3747 error = TRUE;
3748 (*_bfd_error_handler)
3749 (_("%B: compiled with -mrelocatable and linked with "
3750 "modules compiled normally"), ibfd);
3751 }
3752 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3753 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3754 {
3755 error = TRUE;
3756 (*_bfd_error_handler)
3757 (_("%B: compiled normally and linked with "
3758 "modules compiled with -mrelocatable"), ibfd);
3759 }
3760
3761 /* The output is -mrelocatable-lib iff both the input files are. */
3762 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3763 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3764
3765 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3766 but each input file is either -mrelocatable or -mrelocatable-lib. */
3767 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3768 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3769 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3770 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3771
3772 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3773 any module uses it. */
3774 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3775
3776 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3777 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3778
3779 /* Warn about any other mismatches. */
3780 if (new_flags != old_flags)
3781 {
3782 error = TRUE;
3783 (*_bfd_error_handler)
3784 (_("%B: uses different e_flags (0x%lx) fields "
3785 "than previous modules (0x%lx)"),
3786 ibfd, (long) new_flags, (long) old_flags);
3787 }
3788
3789 if (error)
3790 {
3791 bfd_set_error (bfd_error_bad_value);
3792 return FALSE;
3793 }
3794 }
3795
3796 return TRUE;
3797 }
3798 \f
3799 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3800 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3801 int
3802 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3803 struct bfd_link_info *info,
3804 enum ppc_elf_plt_type plt_style,
3805 int emit_stub_syms)
3806 {
3807 struct ppc_elf_link_hash_table *htab;
3808 flagword flags;
3809
3810 htab = ppc_elf_hash_table (info);
3811
3812 if (htab->plt_type == PLT_UNSET)
3813 {
3814 if (plt_style == PLT_OLD)
3815 htab->plt_type = PLT_OLD;
3816 else
3817 {
3818 bfd *ibfd;
3819 enum ppc_elf_plt_type plt_type = plt_style;
3820
3821 /* Look through the reloc flags left by ppc_elf_check_relocs.
3822 Use the old style bss plt if a file makes plt calls
3823 without using the new relocs, and if ld isn't given
3824 --secure-plt and we never see REL16 relocs. */
3825 if (plt_type == PLT_UNSET)
3826 plt_type = PLT_OLD;
3827 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3828 if (is_ppc_elf (ibfd))
3829 {
3830 if (ppc_elf_tdata (ibfd)->has_rel16)
3831 plt_type = PLT_NEW;
3832 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3833 {
3834 plt_type = PLT_OLD;
3835 htab->old_bfd = ibfd;
3836 break;
3837 }
3838 }
3839 htab->plt_type = plt_type;
3840 }
3841 }
3842 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3843 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3844
3845 htab->emit_stub_syms = emit_stub_syms;
3846
3847 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3848
3849 if (htab->plt_type == PLT_NEW)
3850 {
3851 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3852 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3853
3854 /* The new PLT is a loaded section. */
3855 if (htab->plt != NULL
3856 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3857 return -1;
3858
3859 /* The new GOT is not executable. */
3860 if (htab->got != NULL
3861 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3862 return -1;
3863 }
3864 else
3865 {
3866 /* Stop an unused .glink section from affecting .text alignment. */
3867 if (htab->glink != NULL
3868 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3869 return -1;
3870 }
3871 return htab->plt_type == PLT_NEW;
3872 }
3873 \f
3874 /* Return the section that should be marked against GC for a given
3875 relocation. */
3876
3877 static asection *
3878 ppc_elf_gc_mark_hook (asection *sec,
3879 struct bfd_link_info *info,
3880 Elf_Internal_Rela *rel,
3881 struct elf_link_hash_entry *h,
3882 Elf_Internal_Sym *sym)
3883 {
3884 if (h != NULL)
3885 switch (ELF32_R_TYPE (rel->r_info))
3886 {
3887 case R_PPC_GNU_VTINHERIT:
3888 case R_PPC_GNU_VTENTRY:
3889 return NULL;
3890 }
3891
3892 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3893 }
3894
3895 /* Update the got, plt and dynamic reloc reference counts for the
3896 section being removed. */
3897
3898 static bfd_boolean
3899 ppc_elf_gc_sweep_hook (bfd *abfd,
3900 struct bfd_link_info *info,
3901 asection *sec,
3902 const Elf_Internal_Rela *relocs)
3903 {
3904 struct ppc_elf_link_hash_table *htab;
3905 Elf_Internal_Shdr *symtab_hdr;
3906 struct elf_link_hash_entry **sym_hashes;
3907 bfd_signed_vma *local_got_refcounts;
3908 const Elf_Internal_Rela *rel, *relend;
3909 asection *got2;
3910
3911 if (info->relocatable)
3912 return TRUE;
3913
3914 if ((sec->flags & SEC_ALLOC) == 0)
3915 return TRUE;
3916
3917 elf_section_data (sec)->local_dynrel = NULL;
3918
3919 htab = ppc_elf_hash_table (info);
3920 symtab_hdr = &elf_symtab_hdr (abfd);
3921 sym_hashes = elf_sym_hashes (abfd);
3922 local_got_refcounts = elf_local_got_refcounts (abfd);
3923 got2 = bfd_get_section_by_name (abfd, ".got2");
3924
3925 relend = relocs + sec->reloc_count;
3926 for (rel = relocs; rel < relend; rel++)
3927 {
3928 unsigned long r_symndx;
3929 enum elf_ppc_reloc_type r_type;
3930 struct elf_link_hash_entry *h = NULL;
3931
3932 r_symndx = ELF32_R_SYM (rel->r_info);
3933 if (r_symndx >= symtab_hdr->sh_info)
3934 {
3935 struct ppc_elf_dyn_relocs **pp, *p;
3936 struct ppc_elf_link_hash_entry *eh;
3937
3938 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3939 while (h->root.type == bfd_link_hash_indirect
3940 || h->root.type == bfd_link_hash_warning)
3941 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3942 eh = (struct ppc_elf_link_hash_entry *) h;
3943
3944 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3945 if (p->sec == sec)
3946 {
3947 /* Everything must go for SEC. */
3948 *pp = p->next;
3949 break;
3950 }
3951 }
3952
3953 r_type = ELF32_R_TYPE (rel->r_info);
3954 switch (r_type)
3955 {
3956 case R_PPC_GOT_TLSLD16:
3957 case R_PPC_GOT_TLSLD16_LO:
3958 case R_PPC_GOT_TLSLD16_HI:
3959 case R_PPC_GOT_TLSLD16_HA:
3960 case R_PPC_GOT_TLSGD16:
3961 case R_PPC_GOT_TLSGD16_LO:
3962 case R_PPC_GOT_TLSGD16_HI:
3963 case R_PPC_GOT_TLSGD16_HA:
3964 case R_PPC_GOT_TPREL16:
3965 case R_PPC_GOT_TPREL16_LO:
3966 case R_PPC_GOT_TPREL16_HI:
3967 case R_PPC_GOT_TPREL16_HA:
3968 case R_PPC_GOT_DTPREL16:
3969 case R_PPC_GOT_DTPREL16_LO:
3970 case R_PPC_GOT_DTPREL16_HI:
3971 case R_PPC_GOT_DTPREL16_HA:
3972 case R_PPC_GOT16:
3973 case R_PPC_GOT16_LO:
3974 case R_PPC_GOT16_HI:
3975 case R_PPC_GOT16_HA:
3976 if (h != NULL)
3977 {
3978 if (h->got.refcount > 0)
3979 h->got.refcount--;
3980 }
3981 else if (local_got_refcounts != NULL)
3982 {
3983 if (local_got_refcounts[r_symndx] > 0)
3984 local_got_refcounts[r_symndx]--;
3985 }
3986 break;
3987
3988 case R_PPC_REL24:
3989 case R_PPC_REL14:
3990 case R_PPC_REL14_BRTAKEN:
3991 case R_PPC_REL14_BRNTAKEN:
3992 case R_PPC_REL32:
3993 if (h == NULL || h == htab->elf.hgot)
3994 break;
3995 /* Fall thru */
3996
3997 case R_PPC_ADDR32:
3998 case R_PPC_ADDR24:
3999 case R_PPC_ADDR16:
4000 case R_PPC_ADDR16_LO:
4001 case R_PPC_ADDR16_HI:
4002 case R_PPC_ADDR16_HA:
4003 case R_PPC_ADDR14:
4004 case R_PPC_ADDR14_BRTAKEN:
4005 case R_PPC_ADDR14_BRNTAKEN:
4006 case R_PPC_UADDR32:
4007 case R_PPC_UADDR16:
4008 if (info->shared)
4009 break;
4010
4011 case R_PPC_PLT32:
4012 case R_PPC_PLTREL24:
4013 case R_PPC_PLTREL32:
4014 case R_PPC_PLT16_LO:
4015 case R_PPC_PLT16_HI:
4016 case R_PPC_PLT16_HA:
4017 if (h != NULL)
4018 {
4019 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4020 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4021 if (ent->plt.refcount > 0)
4022 ent->plt.refcount -= 1;
4023 }
4024 break;
4025
4026 default:
4027 break;
4028 }
4029 }
4030 return TRUE;
4031 }
4032 \f
4033 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4034
4035 asection *
4036 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4037 {
4038 struct ppc_elf_link_hash_table *htab;
4039
4040 htab = ppc_elf_hash_table (info);
4041 if (htab->plt_type == PLT_NEW
4042 && htab->plt != NULL
4043 && htab->plt->output_section != NULL)
4044 {
4045 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4046 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4047 }
4048
4049 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4050 FALSE, FALSE, TRUE);
4051 return _bfd_elf_tls_setup (obfd, info);
4052 }
4053
4054 /* Run through all the TLS relocs looking for optimization
4055 opportunities. */
4056
4057 bfd_boolean
4058 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4059 struct bfd_link_info *info)
4060 {
4061 bfd *ibfd;
4062 asection *sec;
4063 struct ppc_elf_link_hash_table *htab;
4064 int pass;
4065
4066 if (info->relocatable || info->shared)
4067 return TRUE;
4068
4069 htab = ppc_elf_hash_table (info);
4070 /* Make two passes through the relocs. First time check that tls
4071 relocs involved in setting up a tls_get_addr call are indeed
4072 followed by such a call. If they are not, exclude them from
4073 the optimizations done on the second pass. */
4074 for (pass = 0; pass < 2; ++pass)
4075 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4076 {
4077 Elf_Internal_Sym *locsyms = NULL;
4078 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4079
4080 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4081 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4082 {
4083 Elf_Internal_Rela *relstart, *rel, *relend;
4084
4085 /* Read the relocations. */
4086 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4087 info->keep_memory);
4088 if (relstart == NULL)
4089 return FALSE;
4090
4091 relend = relstart + sec->reloc_count;
4092 for (rel = relstart; rel < relend; rel++)
4093 {
4094 enum elf_ppc_reloc_type r_type;
4095 unsigned long r_symndx;
4096 struct elf_link_hash_entry *h = NULL;
4097 char *tls_mask;
4098 char tls_set, tls_clear;
4099 bfd_boolean is_local;
4100 int expecting_tls_get_addr;
4101 bfd_signed_vma *got_count;
4102
4103 r_symndx = ELF32_R_SYM (rel->r_info);
4104 if (r_symndx >= symtab_hdr->sh_info)
4105 {
4106 struct elf_link_hash_entry **sym_hashes;
4107
4108 sym_hashes = elf_sym_hashes (ibfd);
4109 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4110 while (h->root.type == bfd_link_hash_indirect
4111 || h->root.type == bfd_link_hash_warning)
4112 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4113 }
4114
4115 expecting_tls_get_addr = 0;
4116 is_local = FALSE;
4117 if (h == NULL
4118 || !h->def_dynamic)
4119 is_local = TRUE;
4120
4121 r_type = ELF32_R_TYPE (rel->r_info);
4122 switch (r_type)
4123 {
4124 case R_PPC_GOT_TLSLD16:
4125 case R_PPC_GOT_TLSLD16_LO:
4126 expecting_tls_get_addr = 1;
4127 /* Fall thru */
4128
4129 case R_PPC_GOT_TLSLD16_HI:
4130 case R_PPC_GOT_TLSLD16_HA:
4131 /* These relocs should never be against a symbol
4132 defined in a shared lib. Leave them alone if
4133 that turns out to be the case. */
4134 if (!is_local)
4135 continue;
4136
4137 /* LD -> LE */
4138 tls_set = 0;
4139 tls_clear = TLS_LD;
4140 break;
4141
4142 case R_PPC_GOT_TLSGD16:
4143 case R_PPC_GOT_TLSGD16_LO:
4144 expecting_tls_get_addr = 1;
4145 /* Fall thru */
4146
4147 case R_PPC_GOT_TLSGD16_HI:
4148 case R_PPC_GOT_TLSGD16_HA:
4149 if (is_local)
4150 /* GD -> LE */
4151 tls_set = 0;
4152 else
4153 /* GD -> IE */
4154 tls_set = TLS_TLS | TLS_TPRELGD;
4155 tls_clear = TLS_GD;
4156 break;
4157
4158 case R_PPC_GOT_TPREL16:
4159 case R_PPC_GOT_TPREL16_LO:
4160 case R_PPC_GOT_TPREL16_HI:
4161 case R_PPC_GOT_TPREL16_HA:
4162 if (is_local)
4163 {
4164 /* IE -> LE */
4165 tls_set = 0;
4166 tls_clear = TLS_TPREL;
4167 break;
4168 }
4169 else
4170 continue;
4171
4172 default:
4173 continue;
4174 }
4175
4176 if (pass == 0)
4177 {
4178 if (!expecting_tls_get_addr)
4179 continue;
4180
4181 if (rel + 1 < relend)
4182 {
4183 enum elf_ppc_reloc_type r_type2;
4184 unsigned long r_symndx2;
4185 struct elf_link_hash_entry *h2;
4186
4187 /* The next instruction should be a call to
4188 __tls_get_addr. Peek at the reloc to be sure. */
4189 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4190 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4191 if (r_symndx2 >= symtab_hdr->sh_info
4192 && (r_type2 == R_PPC_REL14
4193 || r_type2 == R_PPC_REL14_BRTAKEN
4194 || r_type2 == R_PPC_REL14_BRNTAKEN
4195 || r_type2 == R_PPC_REL24
4196 || r_type2 == R_PPC_PLTREL24))
4197 {
4198 struct elf_link_hash_entry **sym_hashes;
4199
4200 sym_hashes = elf_sym_hashes (ibfd);
4201 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4202 while (h2->root.type == bfd_link_hash_indirect
4203 || h2->root.type == bfd_link_hash_warning)
4204 h2 = ((struct elf_link_hash_entry *)
4205 h2->root.u.i.link);
4206 if (h2 == htab->tls_get_addr)
4207 continue;
4208 }
4209 }
4210
4211 /* Uh oh, we didn't find the expected call. We
4212 could just mark this symbol to exclude it
4213 from tls optimization but it's safer to skip
4214 the entire section. */
4215 sec->has_tls_reloc = 0;
4216 break;
4217 }
4218
4219 if (h != NULL)
4220 {
4221 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4222 got_count = &h->got.refcount;
4223 }
4224 else
4225 {
4226 Elf_Internal_Sym *sym;
4227 bfd_signed_vma *lgot_refs;
4228 char *lgot_masks;
4229
4230 if (locsyms == NULL)
4231 {
4232 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4233 if (locsyms == NULL)
4234 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4235 symtab_hdr->sh_info,
4236 0, NULL, NULL, NULL);
4237 if (locsyms == NULL)
4238 {
4239 if (elf_section_data (sec)->relocs != relstart)
4240 free (relstart);
4241 return FALSE;
4242 }
4243 }
4244 sym = locsyms + r_symndx;
4245 lgot_refs = elf_local_got_refcounts (ibfd);
4246 if (lgot_refs == NULL)
4247 abort ();
4248 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4249 tls_mask = &lgot_masks[r_symndx];
4250 got_count = &lgot_refs[r_symndx];
4251 }
4252
4253 if (tls_set == 0)
4254 {
4255 /* We managed to get rid of a got entry. */
4256 if (*got_count > 0)
4257 *got_count -= 1;
4258 }
4259
4260 if (expecting_tls_get_addr)
4261 {
4262 struct plt_entry *ent;
4263
4264 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4265 if (ent != NULL && ent->plt.refcount > 0)
4266 ent->plt.refcount -= 1;
4267 }
4268
4269 *tls_mask |= tls_set;
4270 *tls_mask &= ~tls_clear;
4271 }
4272
4273 if (elf_section_data (sec)->relocs != relstart)
4274 free (relstart);
4275 }
4276
4277 if (locsyms != NULL
4278 && (symtab_hdr->contents != (unsigned char *) locsyms))
4279 {
4280 if (!info->keep_memory)
4281 free (locsyms);
4282 else
4283 symtab_hdr->contents = (unsigned char *) locsyms;
4284 }
4285 }
4286 return TRUE;
4287 }
4288 \f
4289 /* Return true if we have dynamic relocs that apply to read-only sections. */
4290
4291 static bfd_boolean
4292 readonly_dynrelocs (struct elf_link_hash_entry *h)
4293 {
4294 struct ppc_elf_dyn_relocs *p;
4295
4296 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4297 {
4298 asection *s = p->sec->output_section;
4299
4300 if (s != NULL
4301 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4302 == (SEC_READONLY | SEC_ALLOC)))
4303 return TRUE;
4304 }
4305 return FALSE;
4306 }
4307
4308 /* Adjust a symbol defined by a dynamic object and referenced by a
4309 regular object. The current definition is in some section of the
4310 dynamic object, but we're not including those sections. We have to
4311 change the definition to something the rest of the link can
4312 understand. */
4313
4314 static bfd_boolean
4315 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4316 struct elf_link_hash_entry *h)
4317 {
4318 struct ppc_elf_link_hash_table *htab;
4319 asection *s;
4320
4321 #ifdef DEBUG
4322 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4323 h->root.root.string);
4324 #endif
4325
4326 /* Make sure we know what is going on here. */
4327 htab = ppc_elf_hash_table (info);
4328 BFD_ASSERT (htab->elf.dynobj != NULL
4329 && (h->needs_plt
4330 || h->u.weakdef != NULL
4331 || (h->def_dynamic
4332 && h->ref_regular
4333 && !h->def_regular)));
4334
4335 /* Deal with function syms. */
4336 if (h->type == STT_FUNC
4337 || h->needs_plt)
4338 {
4339 /* Clear procedure linkage table information for any symbol that
4340 won't need a .plt entry. */
4341 struct plt_entry *ent;
4342 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4343 if (ent->plt.refcount > 0)
4344 break;
4345 if (ent == NULL
4346 || SYMBOL_CALLS_LOCAL (info, h)
4347 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4348 && h->root.type == bfd_link_hash_undefweak))
4349 {
4350 /* A PLT entry is not required/allowed when:
4351
4352 1. We are not using ld.so; because then the PLT entry
4353 can't be set up, so we can't use one. In this case,
4354 ppc_elf_adjust_dynamic_symbol won't even be called.
4355
4356 2. GC has rendered the entry unused.
4357
4358 3. We know for certain that a call to this symbol
4359 will go to this object, or will remain undefined. */
4360 h->plt.plist = NULL;
4361 h->needs_plt = 0;
4362 }
4363 else
4364 {
4365 /* After adjust_dynamic_symbol, non_got_ref set means that
4366 dyn_relocs for this symbol should be discarded.
4367 If we get here we know we are making a PLT entry for this
4368 symbol, and in an executable we'd normally resolve
4369 relocations against this symbol to the PLT entry. Allow
4370 dynamic relocs if the reference is weak, and the dynamic
4371 relocs will not cause text relocation. */
4372 if (!h->ref_regular_nonweak
4373 && h->non_got_ref
4374 && !htab->is_vxworks
4375 && !ppc_elf_hash_entry (h)->has_sda_refs
4376 && !readonly_dynrelocs (h))
4377 h->non_got_ref = 0;
4378 }
4379 return TRUE;
4380 }
4381 else
4382 h->plt.plist = NULL;
4383
4384 /* If this is a weak symbol, and there is a real definition, the
4385 processor independent code will have arranged for us to see the
4386 real definition first, and we can just use the same value. */
4387 if (h->u.weakdef != NULL)
4388 {
4389 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4390 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4391 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4392 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4393 if (ELIMINATE_COPY_RELOCS)
4394 h->non_got_ref = h->u.weakdef->non_got_ref;
4395 return TRUE;
4396 }
4397
4398 /* This is a reference to a symbol defined by a dynamic object which
4399 is not a function. */
4400
4401 /* If we are creating a shared library, we must presume that the
4402 only references to the symbol are via the global offset table.
4403 For such cases we need not do anything here; the relocations will
4404 be handled correctly by relocate_section. */
4405 if (info->shared)
4406 return TRUE;
4407
4408 /* If there are no references to this symbol that do not use the
4409 GOT, we don't need to generate a copy reloc. */
4410 if (!h->non_got_ref)
4411 return TRUE;
4412
4413 /* If we didn't find any dynamic relocs in read-only sections, then
4414 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4415 We can't do this if there are any small data relocations. This
4416 doesn't work on VxWorks, where we can not have dynamic
4417 relocations (other than copy and jump slot relocations) in an
4418 executable. */
4419 if (ELIMINATE_COPY_RELOCS
4420 && !ppc_elf_hash_entry (h)->has_sda_refs
4421 && !htab->is_vxworks
4422 && !h->def_regular
4423 && !readonly_dynrelocs (h))
4424 {
4425 h->non_got_ref = 0;
4426 return TRUE;
4427 }
4428
4429 if (h->size == 0)
4430 {
4431 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4432 h->root.root.string);
4433 return TRUE;
4434 }
4435
4436 /* We must allocate the symbol in our .dynbss section, which will
4437 become part of the .bss section of the executable. There will be
4438 an entry for this symbol in the .dynsym section. The dynamic
4439 object will contain position independent code, so all references
4440 from the dynamic object to this symbol will go through the global
4441 offset table. The dynamic linker will use the .dynsym entry to
4442 determine the address it must put in the global offset table, so
4443 both the dynamic object and the regular object will refer to the
4444 same memory location for the variable.
4445
4446 Of course, if the symbol is referenced using SDAREL relocs, we
4447 must instead allocate it in .sbss. */
4448
4449 if (ppc_elf_hash_entry (h)->has_sda_refs)
4450 s = htab->dynsbss;
4451 else
4452 s = htab->dynbss;
4453 BFD_ASSERT (s != NULL);
4454
4455 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4456 copy the initial value out of the dynamic object and into the
4457 runtime process image. We need to remember the offset into the
4458 .rela.bss section we are going to use. */
4459 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4460 {
4461 asection *srel;
4462
4463 if (ppc_elf_hash_entry (h)->has_sda_refs)
4464 srel = htab->relsbss;
4465 else
4466 srel = htab->relbss;
4467 BFD_ASSERT (srel != NULL);
4468 srel->size += sizeof (Elf32_External_Rela);
4469 h->needs_copy = 1;
4470 }
4471
4472 return _bfd_elf_adjust_dynamic_copy (h, s);
4473 }
4474 \f
4475 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4476 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4477 specifying the addend on the plt relocation. For -fpic code, the sym
4478 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4479 xxxxxxxx.got2.plt_pic32.<callee>. */
4480
4481 static bfd_boolean
4482 add_stub_sym (struct plt_entry *ent,
4483 struct elf_link_hash_entry *h,
4484 struct bfd_link_info *info)
4485 {
4486 struct elf_link_hash_entry *sh;
4487 size_t len1, len2, len3;
4488 char *name;
4489 const char *stub;
4490 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4491
4492 if (info->shared || info->pie)
4493 stub = ".plt_pic32.";
4494 else
4495 stub = ".plt_call32.";
4496
4497 len1 = strlen (h->root.root.string);
4498 len2 = strlen (stub);
4499 len3 = 0;
4500 if (ent->sec)
4501 len3 = strlen (ent->sec->name);
4502 name = bfd_malloc (len1 + len2 + len3 + 9);
4503 if (name == NULL)
4504 return FALSE;
4505 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4506 if (ent->sec)
4507 memcpy (name + 8, ent->sec->name, len3);
4508 memcpy (name + 8 + len3, stub, len2);
4509 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4510 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4511 if (sh == NULL)
4512 return FALSE;
4513 if (sh->root.type == bfd_link_hash_new)
4514 {
4515 sh->root.type = bfd_link_hash_defined;
4516 sh->root.u.def.section = htab->glink;
4517 sh->root.u.def.value = ent->glink_offset;
4518 sh->ref_regular = 1;
4519 sh->def_regular = 1;
4520 sh->ref_regular_nonweak = 1;
4521 sh->forced_local = 1;
4522 sh->non_elf = 0;
4523 }
4524 return TRUE;
4525 }
4526
4527 /* Allocate NEED contiguous space in .got, and return the offset.
4528 Handles allocation of the got header when crossing 32k. */
4529
4530 static bfd_vma
4531 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4532 {
4533 bfd_vma where;
4534 unsigned int max_before_header;
4535
4536 if (htab->plt_type == PLT_VXWORKS)
4537 {
4538 where = htab->got->size;
4539 htab->got->size += need;
4540 }
4541 else
4542 {
4543 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4544 if (need <= htab->got_gap)
4545 {
4546 where = max_before_header - htab->got_gap;
4547 htab->got_gap -= need;
4548 }
4549 else
4550 {
4551 if (htab->got->size + need > max_before_header
4552 && htab->got->size <= max_before_header)
4553 {
4554 htab->got_gap = max_before_header - htab->got->size;
4555 htab->got->size = max_before_header + htab->got_header_size;
4556 }
4557 where = htab->got->size;
4558 htab->got->size += need;
4559 }
4560 }
4561 return where;
4562 }
4563
4564 /* Allocate space in associated reloc sections for dynamic relocs. */
4565
4566 static bfd_boolean
4567 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4568 {
4569 struct bfd_link_info *info = inf;
4570 struct ppc_elf_link_hash_entry *eh;
4571 struct ppc_elf_link_hash_table *htab;
4572 struct ppc_elf_dyn_relocs *p;
4573
4574 if (h->root.type == bfd_link_hash_indirect)
4575 return TRUE;
4576
4577 if (h->root.type == bfd_link_hash_warning)
4578 /* When warning symbols are created, they **replace** the "real"
4579 entry in the hash table, thus we never get to see the real
4580 symbol in a hash traversal. So look at it now. */
4581 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4582
4583 htab = ppc_elf_hash_table (info);
4584 if (htab->elf.dynamic_sections_created)
4585 {
4586 struct plt_entry *ent;
4587 bfd_boolean doneone = FALSE;
4588 bfd_vma plt_offset = 0, glink_offset = 0;
4589
4590 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4591 if (ent->plt.refcount > 0)
4592 {
4593 /* Make sure this symbol is output as a dynamic symbol. */
4594 if (h->dynindx == -1
4595 && !h->forced_local)
4596 {
4597 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4598 return FALSE;
4599 }
4600
4601 if (info->shared
4602 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4603 {
4604 asection *s = htab->plt;
4605
4606 if (htab->plt_type == PLT_NEW)
4607 {
4608 if (!doneone)
4609 {
4610 plt_offset = s->size;
4611 s->size += 4;
4612 }
4613 ent->plt.offset = plt_offset;
4614
4615 s = htab->glink;
4616 if (!doneone || info->shared || info->pie)
4617 {
4618 glink_offset = s->size;
4619 s->size += GLINK_ENTRY_SIZE;
4620 }
4621 if (!doneone
4622 && !info->shared
4623 && h->def_dynamic
4624 && !h->def_regular)
4625 {
4626 h->root.u.def.section = s;
4627 h->root.u.def.value = glink_offset;
4628 }
4629 ent->glink_offset = glink_offset;
4630
4631 if (htab->emit_stub_syms
4632 && !add_stub_sym (ent, h, info))
4633 return FALSE;
4634 }
4635 else
4636 {
4637 if (!doneone)
4638 {
4639 /* If this is the first .plt entry, make room
4640 for the special first entry. */
4641 if (s->size == 0)
4642 s->size += htab->plt_initial_entry_size;
4643
4644 /* The PowerPC PLT is actually composed of two
4645 parts, the first part is 2 words (for a load
4646 and a jump), and then there is a remaining
4647 word available at the end. */
4648 plt_offset = (htab->plt_initial_entry_size
4649 + (htab->plt_slot_size
4650 * ((s->size
4651 - htab->plt_initial_entry_size)
4652 / htab->plt_entry_size)));
4653
4654 /* If this symbol is not defined in a regular
4655 file, and we are not generating a shared
4656 library, then set the symbol to this location
4657 in the .plt. This is required to make
4658 function pointers compare as equal between
4659 the normal executable and the shared library. */
4660 if (! info->shared
4661 && h->def_dynamic
4662 && !h->def_regular)
4663 {
4664 h->root.u.def.section = s;
4665 h->root.u.def.value = plt_offset;
4666 }
4667
4668 /* Make room for this entry. */
4669 s->size += htab->plt_entry_size;
4670 /* After the 8192nd entry, room for two entries
4671 is allocated. */
4672 if (htab->plt_type == PLT_OLD
4673 && (s->size - htab->plt_initial_entry_size)
4674 / htab->plt_entry_size
4675 > PLT_NUM_SINGLE_ENTRIES)
4676 s->size += htab->plt_entry_size;
4677 }
4678 ent->plt.offset = plt_offset;
4679 }
4680
4681 /* We also need to make an entry in the .rela.plt section. */
4682 if (!doneone)
4683 {
4684 htab->relplt->size += sizeof (Elf32_External_Rela);
4685
4686 if (htab->plt_type == PLT_VXWORKS)
4687 {
4688 /* Allocate space for the unloaded relocations. */
4689 if (!info->shared)
4690 {
4691 if (ent->plt.offset
4692 == (bfd_vma) htab->plt_initial_entry_size)
4693 {
4694 htab->srelplt2->size
4695 += sizeof (Elf32_External_Rela)
4696 * VXWORKS_PLTRESOLVE_RELOCS;
4697 }
4698
4699 htab->srelplt2->size
4700 += sizeof (Elf32_External_Rela)
4701 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4702 }
4703
4704 /* Every PLT entry has an associated GOT entry in
4705 .got.plt. */
4706 htab->sgotplt->size += 4;
4707 }
4708 doneone = TRUE;
4709 }
4710 }
4711 else
4712 ent->plt.offset = (bfd_vma) -1;
4713 }
4714 else
4715 ent->plt.offset = (bfd_vma) -1;
4716
4717 if (!doneone)
4718 {
4719 h->plt.plist = NULL;
4720 h->needs_plt = 0;
4721 }
4722 }
4723 else
4724 {
4725 h->plt.plist = NULL;
4726 h->needs_plt = 0;
4727 }
4728
4729 eh = (struct ppc_elf_link_hash_entry *) h;
4730 if (eh->elf.got.refcount > 0)
4731 {
4732 /* Make sure this symbol is output as a dynamic symbol. */
4733 if (eh->elf.dynindx == -1
4734 && !eh->elf.forced_local)
4735 {
4736 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4737 return FALSE;
4738 }
4739
4740 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4741 && !eh->elf.def_dynamic)
4742 {
4743 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4744 htab->tlsld_got.refcount += 1;
4745 eh->elf.got.offset = (bfd_vma) -1;
4746 }
4747 else
4748 {
4749 bfd_boolean dyn;
4750 unsigned int need = 0;
4751 if ((eh->tls_mask & TLS_TLS) != 0)
4752 {
4753 if ((eh->tls_mask & TLS_LD) != 0)
4754 need += 8;
4755 if ((eh->tls_mask & TLS_GD) != 0)
4756 need += 8;
4757 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4758 need += 4;
4759 if ((eh->tls_mask & TLS_DTPREL) != 0)
4760 need += 4;
4761 }
4762 else
4763 need += 4;
4764 eh->elf.got.offset = allocate_got (htab, need);
4765 dyn = htab->elf.dynamic_sections_created;
4766 if ((info->shared
4767 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4768 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4769 || eh->elf.root.type != bfd_link_hash_undefweak))
4770 {
4771 /* All the entries we allocated need relocs.
4772 Except LD only needs one. */
4773 if ((eh->tls_mask & TLS_LD) != 0)
4774 need -= 4;
4775 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4776 }
4777 }
4778 }
4779 else
4780 eh->elf.got.offset = (bfd_vma) -1;
4781
4782 if (eh->dyn_relocs == NULL)
4783 return TRUE;
4784
4785 /* In the shared -Bsymbolic case, discard space allocated for
4786 dynamic pc-relative relocs against symbols which turn out to be
4787 defined in regular objects. For the normal shared case, discard
4788 space for relocs that have become local due to symbol visibility
4789 changes. */
4790
4791 if (info->shared)
4792 {
4793 /* Relocs that use pc_count are those that appear on a call insn,
4794 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4795 generated via assembly. We want calls to protected symbols to
4796 resolve directly to the function rather than going via the plt.
4797 If people want function pointer comparisons to work as expected
4798 then they should avoid writing weird assembly. */
4799 if (SYMBOL_CALLS_LOCAL (info, h))
4800 {
4801 struct ppc_elf_dyn_relocs **pp;
4802
4803 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4804 {
4805 p->count -= p->pc_count;
4806 p->pc_count = 0;
4807 if (p->count == 0)
4808 *pp = p->next;
4809 else
4810 pp = &p->next;
4811 }
4812 }
4813
4814 if (htab->is_vxworks)
4815 {
4816 struct ppc_elf_dyn_relocs **pp;
4817
4818 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4819 {
4820 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
4821 *pp = p->next;
4822 else
4823 pp = &p->next;
4824 }
4825 }
4826
4827 /* Discard relocs on undefined symbols that must be local. */
4828 if (eh->dyn_relocs != NULL
4829 && h->root.type == bfd_link_hash_undefined
4830 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
4831 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
4832 eh->dyn_relocs = NULL;
4833
4834 /* Also discard relocs on undefined weak syms with non-default
4835 visibility. */
4836 if (eh->dyn_relocs != NULL
4837 && h->root.type == bfd_link_hash_undefweak)
4838 {
4839 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4840 eh->dyn_relocs = NULL;
4841
4842 /* Make sure undefined weak symbols are output as a dynamic
4843 symbol in PIEs. */
4844 else if (h->dynindx == -1
4845 && !h->forced_local)
4846 {
4847 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4848 return FALSE;
4849 }
4850 }
4851 }
4852 else if (ELIMINATE_COPY_RELOCS)
4853 {
4854 /* For the non-shared case, discard space for relocs against
4855 symbols which turn out to need copy relocs or are not
4856 dynamic. */
4857
4858 if (!h->non_got_ref
4859 && !h->def_regular)
4860 {
4861 /* Make sure this symbol is output as a dynamic symbol.
4862 Undefined weak syms won't yet be marked as dynamic. */
4863 if (h->dynindx == -1
4864 && !h->forced_local)
4865 {
4866 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4867 return FALSE;
4868 }
4869
4870 /* If that succeeded, we know we'll be keeping all the
4871 relocs. */
4872 if (h->dynindx != -1)
4873 goto keep;
4874 }
4875
4876 eh->dyn_relocs = NULL;
4877
4878 keep: ;
4879 }
4880
4881 /* Finally, allocate space. */
4882 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4883 {
4884 asection *sreloc = elf_section_data (p->sec)->sreloc;
4885 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4886 }
4887
4888 return TRUE;
4889 }
4890
4891 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
4892 read-only sections. */
4893
4894 static bfd_boolean
4895 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
4896 {
4897 if (h->root.type == bfd_link_hash_indirect)
4898 return TRUE;
4899
4900 if (h->root.type == bfd_link_hash_warning)
4901 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4902
4903 if (readonly_dynrelocs (h))
4904 {
4905 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4906
4907 /* Not an error, just cut short the traversal. */
4908 return FALSE;
4909 }
4910 return TRUE;
4911 }
4912
4913 /* Set the sizes of the dynamic sections. */
4914
4915 static bfd_boolean
4916 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4917 struct bfd_link_info *info)
4918 {
4919 struct ppc_elf_link_hash_table *htab;
4920 asection *s;
4921 bfd_boolean relocs;
4922 bfd *ibfd;
4923
4924 #ifdef DEBUG
4925 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4926 #endif
4927
4928 htab = ppc_elf_hash_table (info);
4929 BFD_ASSERT (htab->elf.dynobj != NULL);
4930
4931 if (elf_hash_table (info)->dynamic_sections_created)
4932 {
4933 /* Set the contents of the .interp section to the interpreter. */
4934 if (info->executable)
4935 {
4936 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4937 BFD_ASSERT (s != NULL);
4938 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4939 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4940 }
4941 }
4942
4943 if (htab->plt_type == PLT_OLD)
4944 htab->got_header_size = 16;
4945 else if (htab->plt_type == PLT_NEW)
4946 htab->got_header_size = 12;
4947
4948 /* Set up .got offsets for local syms, and space for local dynamic
4949 relocs. */
4950 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4951 {
4952 bfd_signed_vma *local_got;
4953 bfd_signed_vma *end_local_got;
4954 char *lgot_masks;
4955 bfd_size_type locsymcount;
4956 Elf_Internal_Shdr *symtab_hdr;
4957
4958 if (!is_ppc_elf (ibfd))
4959 continue;
4960
4961 for (s = ibfd->sections; s != NULL; s = s->next)
4962 {
4963 struct ppc_elf_dyn_relocs *p;
4964
4965 for (p = ((struct ppc_elf_dyn_relocs *)
4966 elf_section_data (s)->local_dynrel);
4967 p != NULL;
4968 p = p->next)
4969 {
4970 if (!bfd_is_abs_section (p->sec)
4971 && bfd_is_abs_section (p->sec->output_section))
4972 {
4973 /* Input section has been discarded, either because
4974 it is a copy of a linkonce section or due to
4975 linker script /DISCARD/, so we'll be discarding
4976 the relocs too. */
4977 }
4978 else if (htab->is_vxworks
4979 && strcmp (p->sec->output_section->name,
4980 ".tls_vars") == 0)
4981 {
4982 /* Relocations in vxworks .tls_vars sections are
4983 handled specially by the loader. */
4984 }
4985 else if (p->count != 0)
4986 {
4987 elf_section_data (p->sec)->sreloc->size
4988 += p->count * sizeof (Elf32_External_Rela);
4989 if ((p->sec->output_section->flags
4990 & (SEC_READONLY | SEC_ALLOC))
4991 == (SEC_READONLY | SEC_ALLOC))
4992 info->flags |= DF_TEXTREL;
4993 }
4994 }
4995 }
4996
4997 local_got = elf_local_got_refcounts (ibfd);
4998 if (!local_got)
4999 continue;
5000
5001 symtab_hdr = &elf_symtab_hdr (ibfd);
5002 locsymcount = symtab_hdr->sh_info;
5003 end_local_got = local_got + locsymcount;
5004 lgot_masks = (char *) end_local_got;
5005 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5006 if (*local_got > 0)
5007 {
5008 if (*lgot_masks == (TLS_TLS | TLS_LD))
5009 {
5010 /* If just an LD reloc, we'll just use
5011 htab->tlsld_got.offset. */
5012 htab->tlsld_got.refcount += 1;
5013 *local_got = (bfd_vma) -1;
5014 }
5015 else
5016 {
5017 unsigned int need = 0;
5018 if ((*lgot_masks & TLS_TLS) != 0)
5019 {
5020 if ((*lgot_masks & TLS_GD) != 0)
5021 need += 8;
5022 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5023 need += 4;
5024 if ((*lgot_masks & TLS_DTPREL) != 0)
5025 need += 4;
5026 }
5027 else
5028 need += 4;
5029 *local_got = allocate_got (htab, need);
5030 if (info->shared)
5031 htab->relgot->size += (need
5032 * (sizeof (Elf32_External_Rela) / 4));
5033 }
5034 }
5035 else
5036 *local_got = (bfd_vma) -1;
5037 }
5038
5039 /* Allocate space for global sym dynamic relocs. */
5040 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5041
5042 if (htab->tlsld_got.refcount > 0)
5043 {
5044 htab->tlsld_got.offset = allocate_got (htab, 8);
5045 if (info->shared)
5046 htab->relgot->size += sizeof (Elf32_External_Rela);
5047 }
5048 else
5049 htab->tlsld_got.offset = (bfd_vma) -1;
5050
5051 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5052 {
5053 unsigned int g_o_t = 32768;
5054
5055 /* If we haven't allocated the header, do so now. When we get here,
5056 for old plt/got the got size will be 0 to 32764 (not allocated),
5057 or 32780 to 65536 (header allocated). For new plt/got, the
5058 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5059 if (htab->got->size <= 32768)
5060 {
5061 g_o_t = htab->got->size;
5062 if (htab->plt_type == PLT_OLD)
5063 g_o_t += 4;
5064 htab->got->size += htab->got_header_size;
5065 }
5066
5067 htab->elf.hgot->root.u.def.value = g_o_t;
5068 }
5069
5070 if (htab->glink != NULL && htab->glink->size != 0)
5071 {
5072 htab->glink_pltresolve = htab->glink->size;
5073 /* Space for the branch table. */
5074 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5075 /* Pad out to align the start of PLTresolve. */
5076 htab->glink->size += -htab->glink->size & 15;
5077 htab->glink->size += GLINK_PLTRESOLVE;
5078
5079 if (htab->emit_stub_syms)
5080 {
5081 struct elf_link_hash_entry *sh;
5082 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5083 TRUE, FALSE, FALSE);
5084 if (sh == NULL)
5085 return FALSE;
5086 if (sh->root.type == bfd_link_hash_new)
5087 {
5088 sh->root.type = bfd_link_hash_defined;
5089 sh->root.u.def.section = htab->glink;
5090 sh->root.u.def.value = htab->glink_pltresolve;
5091 sh->ref_regular = 1;
5092 sh->def_regular = 1;
5093 sh->ref_regular_nonweak = 1;
5094 sh->forced_local = 1;
5095 sh->non_elf = 0;
5096 }
5097 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5098 TRUE, FALSE, FALSE);
5099 if (sh == NULL)
5100 return FALSE;
5101 if (sh->root.type == bfd_link_hash_new)
5102 {
5103 sh->root.type = bfd_link_hash_defined;
5104 sh->root.u.def.section = htab->glink;
5105 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5106 sh->ref_regular = 1;
5107 sh->def_regular = 1;
5108 sh->ref_regular_nonweak = 1;
5109 sh->forced_local = 1;
5110 sh->non_elf = 0;
5111 }
5112 }
5113 }
5114
5115 /* We've now determined the sizes of the various dynamic sections.
5116 Allocate memory for them. */
5117 relocs = FALSE;
5118 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5119 {
5120 bfd_boolean strip_section = TRUE;
5121
5122 if ((s->flags & SEC_LINKER_CREATED) == 0)
5123 continue;
5124
5125 if (s == htab->plt
5126 || s == htab->glink
5127 || s == htab->got
5128 || s == htab->sgotplt
5129 || s == htab->sbss
5130 || s == htab->dynbss
5131 || s == htab->dynsbss)
5132 {
5133 /* We'd like to strip these sections if they aren't needed, but if
5134 we've exported dynamic symbols from them we must leave them.
5135 It's too late to tell BFD to get rid of the symbols. */
5136 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5137 strip_section = FALSE;
5138 /* Strip this section if we don't need it; see the
5139 comment below. */
5140 }
5141 else if (s == htab->sdata[0].section
5142 || s == htab->sdata[1].section)
5143 {
5144 /* Strip these too. */
5145 }
5146 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5147 {
5148 if (s->size != 0)
5149 {
5150 /* Remember whether there are any relocation sections. */
5151 relocs = TRUE;
5152
5153 /* We use the reloc_count field as a counter if we need
5154 to copy relocs into the output file. */
5155 s->reloc_count = 0;
5156 }
5157 }
5158 else
5159 {
5160 /* It's not one of our sections, so don't allocate space. */
5161 continue;
5162 }
5163
5164 if (s->size == 0 && strip_section)
5165 {
5166 /* If we don't need this section, strip it from the
5167 output file. This is mostly to handle .rela.bss and
5168 .rela.plt. We must create both sections in
5169 create_dynamic_sections, because they must be created
5170 before the linker maps input sections to output
5171 sections. The linker does that before
5172 adjust_dynamic_symbol is called, and it is that
5173 function which decides whether anything needs to go
5174 into these sections. */
5175 s->flags |= SEC_EXCLUDE;
5176 continue;
5177 }
5178
5179 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5180 continue;
5181
5182 /* Allocate memory for the section contents. */
5183 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5184 if (s->contents == NULL)
5185 return FALSE;
5186 }
5187
5188 if (htab->elf.dynamic_sections_created)
5189 {
5190 /* Add some entries to the .dynamic section. We fill in the
5191 values later, in ppc_elf_finish_dynamic_sections, but we
5192 must add the entries now so that we get the correct size for
5193 the .dynamic section. The DT_DEBUG entry is filled in by the
5194 dynamic linker and used by the debugger. */
5195 #define add_dynamic_entry(TAG, VAL) \
5196 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5197
5198 if (info->executable)
5199 {
5200 if (!add_dynamic_entry (DT_DEBUG, 0))
5201 return FALSE;
5202 }
5203
5204 if (htab->plt != NULL && htab->plt->size != 0)
5205 {
5206 if (!add_dynamic_entry (DT_PLTGOT, 0)
5207 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5208 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5209 || !add_dynamic_entry (DT_JMPREL, 0))
5210 return FALSE;
5211 }
5212
5213 if (htab->glink != NULL && htab->glink->size != 0)
5214 {
5215 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5216 return FALSE;
5217 }
5218
5219 if (relocs)
5220 {
5221 if (!add_dynamic_entry (DT_RELA, 0)
5222 || !add_dynamic_entry (DT_RELASZ, 0)
5223 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5224 return FALSE;
5225 }
5226
5227 /* If any dynamic relocs apply to a read-only section, then we
5228 need a DT_TEXTREL entry. */
5229 if ((info->flags & DF_TEXTREL) == 0)
5230 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5231 info);
5232
5233 if ((info->flags & DF_TEXTREL) != 0)
5234 {
5235 if (!add_dynamic_entry (DT_TEXTREL, 0))
5236 return FALSE;
5237 }
5238 if (htab->is_vxworks
5239 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5240 return FALSE;
5241 }
5242 #undef add_dynamic_entry
5243
5244 return TRUE;
5245 }
5246
5247 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5248
5249 static bfd_boolean
5250 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5251 {
5252 if (h->plt.plist != NULL
5253 && !h->def_regular
5254 && (!h->pointer_equality_needed
5255 || !h->ref_regular_nonweak))
5256 return FALSE;
5257
5258 return _bfd_elf_hash_symbol (h);
5259 }
5260 \f
5261 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5262
5263 static const int shared_stub_entry[] =
5264 {
5265 0x7c0802a6, /* mflr 0 */
5266 0x429f0005, /* bcl 20, 31, .Lxxx */
5267 0x7d6802a6, /* mflr 11 */
5268 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5269 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5270 0x7c0803a6, /* mtlr 0 */
5271 0x7d6903a6, /* mtctr 11 */
5272 0x4e800420, /* bctr */
5273 };
5274
5275 static const int stub_entry[] =
5276 {
5277 0x3d600000, /* lis 11,xxx@ha */
5278 0x396b0000, /* addi 11,11,xxx@l */
5279 0x7d6903a6, /* mtctr 11 */
5280 0x4e800420, /* bctr */
5281 };
5282
5283 static bfd_boolean
5284 ppc_elf_relax_section (bfd *abfd,
5285 asection *isec,
5286 struct bfd_link_info *link_info,
5287 bfd_boolean *again)
5288 {
5289 struct one_fixup
5290 {
5291 struct one_fixup *next;
5292 asection *tsec;
5293 bfd_vma toff;
5294 bfd_vma trampoff;
5295 };
5296
5297 Elf_Internal_Shdr *symtab_hdr;
5298 bfd_byte *contents = NULL;
5299 Elf_Internal_Sym *isymbuf = NULL;
5300 Elf_Internal_Rela *internal_relocs = NULL;
5301 Elf_Internal_Rela *irel, *irelend;
5302 struct one_fixup *fixups = NULL;
5303 bfd_boolean changed;
5304 struct ppc_elf_link_hash_table *htab;
5305 bfd_size_type trampoff;
5306 asection *got2;
5307
5308 *again = FALSE;
5309
5310 /* Nothing to do if there are no relocations, and no need to do
5311 anything with non-alloc sections. */
5312 if ((isec->flags & SEC_ALLOC) == 0
5313 || (isec->flags & SEC_RELOC) == 0
5314 || isec->reloc_count == 0)
5315 return TRUE;
5316
5317 trampoff = (isec->size + 3) & (bfd_vma) -4;
5318 /* Space for a branch around any trampolines. */
5319 trampoff += 4;
5320
5321 symtab_hdr = &elf_symtab_hdr (abfd);
5322
5323 /* Get a copy of the native relocations. */
5324 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5325 link_info->keep_memory);
5326 if (internal_relocs == NULL)
5327 goto error_return;
5328
5329 htab = ppc_elf_hash_table (link_info);
5330 got2 = bfd_get_section_by_name (abfd, ".got2");
5331
5332 irelend = internal_relocs + isec->reloc_count;
5333 for (irel = internal_relocs; irel < irelend; irel++)
5334 {
5335 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5336 bfd_vma symaddr, reladdr, toff, roff;
5337 asection *tsec;
5338 struct one_fixup *f;
5339 size_t insn_offset = 0;
5340 bfd_vma max_branch_offset, val;
5341 bfd_byte *hit_addr;
5342 unsigned long t0;
5343 unsigned char sym_type;
5344
5345 switch (r_type)
5346 {
5347 case R_PPC_REL24:
5348 case R_PPC_LOCAL24PC:
5349 case R_PPC_PLTREL24:
5350 max_branch_offset = 1 << 25;
5351 break;
5352
5353 case R_PPC_REL14:
5354 case R_PPC_REL14_BRTAKEN:
5355 case R_PPC_REL14_BRNTAKEN:
5356 max_branch_offset = 1 << 15;
5357 break;
5358
5359 default:
5360 continue;
5361 }
5362
5363 /* Get the value of the symbol referred to by the reloc. */
5364 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5365 {
5366 /* A local symbol. */
5367 Elf_Internal_Sym *isym;
5368
5369 /* Read this BFD's local symbols. */
5370 if (isymbuf == NULL)
5371 {
5372 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5373 if (isymbuf == NULL)
5374 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5375 symtab_hdr->sh_info, 0,
5376 NULL, NULL, NULL);
5377 if (isymbuf == 0)
5378 goto error_return;
5379 }
5380 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5381 if (isym->st_shndx == SHN_UNDEF)
5382 continue; /* We can't do anything with undefined symbols. */
5383 else if (isym->st_shndx == SHN_ABS)
5384 tsec = bfd_abs_section_ptr;
5385 else if (isym->st_shndx == SHN_COMMON)
5386 tsec = bfd_com_section_ptr;
5387 else
5388 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5389
5390 toff = isym->st_value;
5391 sym_type = ELF_ST_TYPE (isym->st_info);
5392 }
5393 else
5394 {
5395 /* Global symbol handling. */
5396 unsigned long indx;
5397 struct elf_link_hash_entry *h;
5398
5399 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5400 h = elf_sym_hashes (abfd)[indx];
5401
5402 while (h->root.type == bfd_link_hash_indirect
5403 || h->root.type == bfd_link_hash_warning)
5404 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5405
5406 tsec = NULL;
5407 toff = 0;
5408 if (r_type == R_PPC_PLTREL24
5409 && htab->plt != NULL)
5410 {
5411 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5412
5413 if (ent != NULL)
5414 {
5415 if (htab->plt_type == PLT_NEW)
5416 {
5417 tsec = htab->glink;
5418 toff = ent->glink_offset;
5419 }
5420 else
5421 {
5422 tsec = htab->plt;
5423 toff = ent->plt.offset;
5424 }
5425 }
5426 }
5427 if (tsec != NULL)
5428 ;
5429 else if (h->root.type == bfd_link_hash_defined
5430 || h->root.type == bfd_link_hash_defweak)
5431 {
5432 tsec = h->root.u.def.section;
5433 toff = h->root.u.def.value;
5434 }
5435 else
5436 continue;
5437
5438 sym_type = h->type;
5439 }
5440
5441 /* If the branch and target are in the same section, you have
5442 no hope of adding stubs. We'll error out later should the
5443 branch overflow. */
5444 if (tsec == isec)
5445 continue;
5446
5447 /* There probably isn't any reason to handle symbols in
5448 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5449 attribute for a code section, and we are only looking at
5450 branches. However, implement it correctly here as a
5451 reference for other target relax_section functions. */
5452 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5453 {
5454 /* At this stage in linking, no SEC_MERGE symbol has been
5455 adjusted, so all references to such symbols need to be
5456 passed through _bfd_merged_section_offset. (Later, in
5457 relocate_section, all SEC_MERGE symbols *except* for
5458 section symbols have been adjusted.)
5459
5460 gas may reduce relocations against symbols in SEC_MERGE
5461 sections to a relocation against the section symbol when
5462 the original addend was zero. When the reloc is against
5463 a section symbol we should include the addend in the
5464 offset passed to _bfd_merged_section_offset, since the
5465 location of interest is the original symbol. On the
5466 other hand, an access to "sym+addend" where "sym" is not
5467 a section symbol should not include the addend; Such an
5468 access is presumed to be an offset from "sym"; The
5469 location of interest is just "sym". */
5470 if (sym_type == STT_SECTION)
5471 toff += irel->r_addend;
5472
5473 toff = _bfd_merged_section_offset (abfd, &tsec,
5474 elf_section_data (tsec)->sec_info,
5475 toff);
5476
5477 if (sym_type != STT_SECTION)
5478 toff += irel->r_addend;
5479 }
5480 /* PLTREL24 addends are special. */
5481 else if (r_type != R_PPC_PLTREL24)
5482 toff += irel->r_addend;
5483
5484 /* Attempted -shared link of non-pic code loses. */
5485 if (tsec->output_section == NULL)
5486 continue;
5487
5488 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5489
5490 roff = irel->r_offset;
5491 reladdr = isec->output_section->vma + isec->output_offset + roff;
5492
5493 /* If the branch is in range, no need to do anything. */
5494 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5495 continue;
5496
5497 /* Look for an existing fixup to this address. */
5498 for (f = fixups; f ; f = f->next)
5499 if (f->tsec == tsec && f->toff == toff)
5500 break;
5501
5502 if (f == NULL)
5503 {
5504 size_t size;
5505 unsigned long stub_rtype;
5506
5507 val = trampoff - roff;
5508 if (val >= max_branch_offset)
5509 /* Oh dear, we can't reach a trampoline. Don't try to add
5510 one. We'll report an error later. */
5511 continue;
5512
5513 if (link_info->shared)
5514 {
5515 size = 4 * ARRAY_SIZE (shared_stub_entry);
5516 insn_offset = 12;
5517 stub_rtype = R_PPC_RELAX32PC;
5518 }
5519 else
5520 {
5521 size = 4 * ARRAY_SIZE (stub_entry);
5522 insn_offset = 0;
5523 stub_rtype = R_PPC_RELAX32;
5524 }
5525
5526 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5527 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5528 abort ();
5529 if (tsec == htab->plt
5530 || tsec == htab->glink)
5531 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5532
5533 /* Hijack the old relocation. Since we need two
5534 relocations for this use a "composite" reloc. */
5535 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5536 stub_rtype);
5537 irel->r_offset = trampoff + insn_offset;
5538
5539 /* Record the fixup so we don't do it again this section. */
5540 f = bfd_malloc (sizeof (*f));
5541 f->next = fixups;
5542 f->tsec = tsec;
5543 f->toff = toff;
5544 f->trampoff = trampoff;
5545 fixups = f;
5546
5547 trampoff += size;
5548 }
5549 else
5550 {
5551 val = f->trampoff - roff;
5552 if (val >= max_branch_offset)
5553 continue;
5554
5555 /* Nop out the reloc, since we're finalizing things here. */
5556 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5557 }
5558
5559 /* Get the section contents. */
5560 if (contents == NULL)
5561 {
5562 /* Get cached copy if it exists. */
5563 if (elf_section_data (isec)->this_hdr.contents != NULL)
5564 contents = elf_section_data (isec)->this_hdr.contents;
5565 else
5566 {
5567 /* Go get them off disk. */
5568 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5569 goto error_return;
5570 }
5571 }
5572
5573 /* Fix up the existing branch to hit the trampoline. */
5574 hit_addr = contents + roff;
5575 switch (r_type)
5576 {
5577 case R_PPC_REL24:
5578 case R_PPC_LOCAL24PC:
5579 case R_PPC_PLTREL24:
5580 t0 = bfd_get_32 (abfd, hit_addr);
5581 t0 &= ~0x3fffffc;
5582 t0 |= val & 0x3fffffc;
5583 bfd_put_32 (abfd, t0, hit_addr);
5584 break;
5585
5586 case R_PPC_REL14:
5587 case R_PPC_REL14_BRTAKEN:
5588 case R_PPC_REL14_BRNTAKEN:
5589 t0 = bfd_get_32 (abfd, hit_addr);
5590 t0 &= ~0xfffc;
5591 t0 |= val & 0xfffc;
5592 bfd_put_32 (abfd, t0, hit_addr);
5593 break;
5594 }
5595 }
5596
5597 /* Write out the trampolines. */
5598 changed = fixups != NULL;
5599 if (fixups != NULL)
5600 {
5601 const int *stub;
5602 bfd_byte *dest;
5603 bfd_vma val;
5604 int i, size;
5605
5606 do
5607 {
5608 struct one_fixup *f = fixups;
5609 fixups = fixups->next;
5610 free (f);
5611 }
5612 while (fixups);
5613
5614 contents = bfd_realloc_or_free (contents, trampoff);
5615 if (contents == NULL)
5616 goto error_return;
5617
5618 isec->size = (isec->size + 3) & (bfd_vma) -4;
5619 /* Branch around the trampolines. */
5620 val = trampoff - isec->size + 0x48000000;
5621 dest = contents + isec->size;
5622 isec->size = trampoff;
5623 bfd_put_32 (abfd, val, dest);
5624 dest += 4;
5625
5626 if (link_info->shared)
5627 {
5628 stub = shared_stub_entry;
5629 size = ARRAY_SIZE (shared_stub_entry);
5630 }
5631 else
5632 {
5633 stub = stub_entry;
5634 size = ARRAY_SIZE (stub_entry);
5635 }
5636
5637 i = 0;
5638 while (dest < contents + trampoff)
5639 {
5640 bfd_put_32 (abfd, stub[i], dest);
5641 i++;
5642 if (i == size)
5643 i = 0;
5644 dest += 4;
5645 }
5646 BFD_ASSERT (i == 0);
5647 }
5648
5649 if (isymbuf != NULL
5650 && symtab_hdr->contents != (unsigned char *) isymbuf)
5651 {
5652 if (! link_info->keep_memory)
5653 free (isymbuf);
5654 else
5655 {
5656 /* Cache the symbols for elf_link_input_bfd. */
5657 symtab_hdr->contents = (unsigned char *) isymbuf;
5658 }
5659 }
5660
5661 if (contents != NULL
5662 && elf_section_data (isec)->this_hdr.contents != contents)
5663 {
5664 if (!changed && !link_info->keep_memory)
5665 free (contents);
5666 else
5667 {
5668 /* Cache the section contents for elf_link_input_bfd. */
5669 elf_section_data (isec)->this_hdr.contents = contents;
5670 }
5671 }
5672
5673 if (elf_section_data (isec)->relocs != internal_relocs)
5674 {
5675 if (!changed)
5676 free (internal_relocs);
5677 else
5678 elf_section_data (isec)->relocs = internal_relocs;
5679 }
5680
5681 *again = changed;
5682 return TRUE;
5683
5684 error_return:
5685 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5686 free (isymbuf);
5687 if (contents != NULL
5688 && elf_section_data (isec)->this_hdr.contents != contents)
5689 free (contents);
5690 if (internal_relocs != NULL
5691 && elf_section_data (isec)->relocs != internal_relocs)
5692 free (internal_relocs);
5693 return FALSE;
5694 }
5695 \f
5696 /* What to do when ld finds relocations against symbols defined in
5697 discarded sections. */
5698
5699 static unsigned int
5700 ppc_elf_action_discarded (asection *sec)
5701 {
5702 if (strcmp (".fixup", sec->name) == 0)
5703 return 0;
5704
5705 if (strcmp (".got2", sec->name) == 0)
5706 return 0;
5707
5708 return _bfd_elf_default_action_discarded (sec);
5709 }
5710 \f
5711 /* Fill in the address for a pointer generated in a linker section. */
5712
5713 static bfd_vma
5714 elf_finish_pointer_linker_section (bfd *input_bfd,
5715 elf_linker_section_t *lsect,
5716 struct elf_link_hash_entry *h,
5717 bfd_vma relocation,
5718 const Elf_Internal_Rela *rel)
5719 {
5720 elf_linker_section_pointers_t *linker_section_ptr;
5721
5722 BFD_ASSERT (lsect != NULL);
5723
5724 if (h != NULL)
5725 {
5726 /* Handle global symbol. */
5727 struct ppc_elf_link_hash_entry *eh;
5728
5729 eh = (struct ppc_elf_link_hash_entry *) h;
5730 BFD_ASSERT (eh->elf.def_regular);
5731 linker_section_ptr = eh->linker_section_pointer;
5732 }
5733 else
5734 {
5735 /* Handle local symbol. */
5736 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5737
5738 BFD_ASSERT (is_ppc_elf (input_bfd));
5739 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5740 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5741 }
5742
5743 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5744 rel->r_addend,
5745 lsect);
5746 BFD_ASSERT (linker_section_ptr != NULL);
5747
5748 /* Offset will always be a multiple of four, so use the bottom bit
5749 as a "written" flag. */
5750 if ((linker_section_ptr->offset & 1) == 0)
5751 {
5752 bfd_put_32 (lsect->section->owner,
5753 relocation + linker_section_ptr->addend,
5754 lsect->section->contents + linker_section_ptr->offset);
5755 linker_section_ptr->offset += 1;
5756 }
5757
5758 relocation = (lsect->section->output_offset
5759 + linker_section_ptr->offset - 1
5760 - 0x8000);
5761
5762 #ifdef DEBUG
5763 fprintf (stderr,
5764 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5765 lsect->name, (long) relocation, (long) relocation);
5766 #endif
5767
5768 /* Subtract out the addend, because it will get added back in by the normal
5769 processing. */
5770 return relocation - linker_section_ptr->addend;
5771 }
5772
5773 /* The RELOCATE_SECTION function is called by the ELF backend linker
5774 to handle the relocations for a section.
5775
5776 The relocs are always passed as Rela structures; if the section
5777 actually uses Rel structures, the r_addend field will always be
5778 zero.
5779
5780 This function is responsible for adjust the section contents as
5781 necessary, and (if using Rela relocs and generating a
5782 relocatable output file) adjusting the reloc addend as
5783 necessary.
5784
5785 This function does not have to worry about setting the reloc
5786 address or the reloc symbol index.
5787
5788 LOCAL_SYMS is a pointer to the swapped in local symbols.
5789
5790 LOCAL_SECTIONS is an array giving the section in the input file
5791 corresponding to the st_shndx field of each local symbol.
5792
5793 The global hash table entry for the global symbols can be found
5794 via elf_sym_hashes (input_bfd).
5795
5796 When generating relocatable output, this function must handle
5797 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5798 going to be the section symbol corresponding to the output
5799 section, which means that the addend must be adjusted
5800 accordingly. */
5801
5802 static bfd_boolean
5803 ppc_elf_relocate_section (bfd *output_bfd,
5804 struct bfd_link_info *info,
5805 bfd *input_bfd,
5806 asection *input_section,
5807 bfd_byte *contents,
5808 Elf_Internal_Rela *relocs,
5809 Elf_Internal_Sym *local_syms,
5810 asection **local_sections)
5811 {
5812 Elf_Internal_Shdr *symtab_hdr;
5813 struct elf_link_hash_entry **sym_hashes;
5814 struct ppc_elf_link_hash_table *htab;
5815 Elf_Internal_Rela *rel;
5816 Elf_Internal_Rela *relend;
5817 Elf_Internal_Rela outrel;
5818 bfd_byte *loc;
5819 asection *got2, *sreloc = NULL;
5820 bfd_vma *local_got_offsets;
5821 bfd_boolean ret = TRUE;
5822 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5823 bfd_boolean is_vxworks_tls;
5824
5825 #ifdef DEBUG
5826 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5827 "%ld relocations%s",
5828 input_bfd, input_section,
5829 (long) input_section->reloc_count,
5830 (info->relocatable) ? " (relocatable)" : "");
5831 #endif
5832
5833 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5834
5835 /* Initialize howto table if not already done. */
5836 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5837 ppc_elf_howto_init ();
5838
5839 htab = ppc_elf_hash_table (info);
5840 local_got_offsets = elf_local_got_offsets (input_bfd);
5841 symtab_hdr = &elf_symtab_hdr (input_bfd);
5842 sym_hashes = elf_sym_hashes (input_bfd);
5843 /* We have to handle relocations in vxworks .tls_vars sections
5844 specially, because the dynamic loader is 'weird'. */
5845 is_vxworks_tls = (htab->is_vxworks && info->shared
5846 && !strcmp (input_section->output_section->name,
5847 ".tls_vars"));
5848 rel = relocs;
5849 relend = relocs + input_section->reloc_count;
5850 for (; rel < relend; rel++)
5851 {
5852 enum elf_ppc_reloc_type r_type;
5853 bfd_vma addend;
5854 bfd_reloc_status_type r;
5855 Elf_Internal_Sym *sym;
5856 asection *sec;
5857 struct elf_link_hash_entry *h;
5858 const char *sym_name;
5859 reloc_howto_type *howto;
5860 unsigned long r_symndx;
5861 bfd_vma relocation;
5862 bfd_vma branch_bit, insn, from;
5863 bfd_boolean unresolved_reloc;
5864 bfd_boolean warned;
5865 unsigned int tls_type, tls_mask, tls_gd;
5866
5867 r_type = ELF32_R_TYPE (rel->r_info);
5868 sym = NULL;
5869 sec = NULL;
5870 h = NULL;
5871 unresolved_reloc = FALSE;
5872 warned = FALSE;
5873 r_symndx = ELF32_R_SYM (rel->r_info);
5874
5875 if (r_symndx < symtab_hdr->sh_info)
5876 {
5877 sym = local_syms + r_symndx;
5878 sec = local_sections[r_symndx];
5879 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5880
5881 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5882 }
5883 else
5884 {
5885 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5886 r_symndx, symtab_hdr, sym_hashes,
5887 h, sec, relocation,
5888 unresolved_reloc, warned);
5889
5890 sym_name = h->root.root.string;
5891 }
5892
5893 if (sec != NULL && elf_discarded_section (sec))
5894 {
5895 /* For relocs against symbols from removed linkonce sections,
5896 or sections discarded by a linker script, we just want the
5897 section contents zeroed. Avoid any special processing. */
5898 howto = NULL;
5899 if (r_type < R_PPC_max)
5900 howto = ppc_elf_howto_table[r_type];
5901 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5902 rel->r_info = 0;
5903 rel->r_addend = 0;
5904 continue;
5905 }
5906
5907 if (info->relocatable)
5908 {
5909 if (got2 != NULL
5910 && r_type == R_PPC_PLTREL24
5911 && rel->r_addend >= 32768)
5912 {
5913 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5914 addend specifies the GOT pointer offset within .got2. */
5915 rel->r_addend += got2->output_offset;
5916 }
5917 continue;
5918 }
5919
5920 /* TLS optimizations. Replace instruction sequences and relocs
5921 based on information we collected in tls_optimize. We edit
5922 RELOCS so that --emit-relocs will output something sensible
5923 for the final instruction stream. */
5924 tls_mask = 0;
5925 tls_gd = 0;
5926 if (IS_PPC_TLS_RELOC (r_type))
5927 {
5928 if (h != NULL)
5929 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5930 else if (local_got_offsets != NULL)
5931 {
5932 char *lgot_masks;
5933 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5934 tls_mask = lgot_masks[r_symndx];
5935 }
5936 }
5937
5938 /* Ensure reloc mapping code below stays sane. */
5939 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5940 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5941 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5942 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5943 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5944 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5945 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5946 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5947 abort ();
5948 switch (r_type)
5949 {
5950 default:
5951 break;
5952
5953 case R_PPC_GOT_TPREL16:
5954 case R_PPC_GOT_TPREL16_LO:
5955 if (tls_mask != 0
5956 && (tls_mask & TLS_TPREL) == 0)
5957 {
5958 bfd_vma insn;
5959 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5960 insn &= 31 << 21;
5961 insn |= 0x3c020000; /* addis 0,2,0 */
5962 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5963 r_type = R_PPC_TPREL16_HA;
5964 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5965 }
5966 break;
5967
5968 case R_PPC_TLS:
5969 if (tls_mask != 0
5970 && (tls_mask & TLS_TPREL) == 0)
5971 {
5972 bfd_vma insn, rtra;
5973 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5974 if ((insn & ((31 << 26) | (31 << 11)))
5975 == ((31 << 26) | (2 << 11)))
5976 rtra = insn & ((1 << 26) - (1 << 16));
5977 else if ((insn & ((31 << 26) | (31 << 16)))
5978 == ((31 << 26) | (2 << 16)))
5979 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5980 else
5981 abort ();
5982 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5983 /* add -> addi. */
5984 insn = 14 << 26;
5985 else if ((insn & (31 << 1)) == 23 << 1
5986 && ((insn & (31 << 6)) < 14 << 6
5987 || ((insn & (31 << 6)) >= 16 << 6
5988 && (insn & (31 << 6)) < 24 << 6)))
5989 /* load and store indexed -> dform. */
5990 insn = (32 | ((insn >> 6) & 31)) << 26;
5991 else if ((insn & (31 << 1)) == 21 << 1
5992 && (insn & (0x1a << 6)) == 0)
5993 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5994 insn = (((58 | ((insn >> 6) & 4)) << 26)
5995 | ((insn >> 6) & 1));
5996 else if ((insn & (31 << 1)) == 21 << 1
5997 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5998 /* lwax -> lwa. */
5999 insn = (58 << 26) | 2;
6000 else
6001 abort ();
6002 insn |= rtra;
6003 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6004 r_type = R_PPC_TPREL16_LO;
6005 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6006
6007 /* Was PPC_TLS which sits on insn boundary, now
6008 PPC_TPREL16_LO which is at low-order half-word. */
6009 rel->r_offset += d_offset;
6010 }
6011 break;
6012
6013 case R_PPC_GOT_TLSGD16_HI:
6014 case R_PPC_GOT_TLSGD16_HA:
6015 tls_gd = TLS_TPRELGD;
6016 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6017 goto tls_gdld_hi;
6018 break;
6019
6020 case R_PPC_GOT_TLSLD16_HI:
6021 case R_PPC_GOT_TLSLD16_HA:
6022 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6023 {
6024 tls_gdld_hi:
6025 if ((tls_mask & tls_gd) != 0)
6026 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6027 + R_PPC_GOT_TPREL16);
6028 else
6029 {
6030 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6031 rel->r_offset -= d_offset;
6032 r_type = R_PPC_NONE;
6033 }
6034 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6035 }
6036 break;
6037
6038 case R_PPC_GOT_TLSGD16:
6039 case R_PPC_GOT_TLSGD16_LO:
6040 tls_gd = TLS_TPRELGD;
6041 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6042 goto tls_ldgd_opt;
6043 break;
6044
6045 case R_PPC_GOT_TLSLD16:
6046 case R_PPC_GOT_TLSLD16_LO:
6047 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6048 {
6049 bfd_vma insn1, insn2;
6050 bfd_vma offset;
6051
6052 tls_ldgd_opt:
6053 offset = rel[1].r_offset;
6054 insn1 = bfd_get_32 (output_bfd,
6055 contents + rel->r_offset - d_offset);
6056 if ((tls_mask & tls_gd) != 0)
6057 {
6058 /* IE */
6059 insn1 &= (1 << 26) - 1;
6060 insn1 |= 32 << 26; /* lwz */
6061 insn2 = 0x7c631214; /* add 3,3,2 */
6062 rel[1].r_info
6063 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6064 rel[1].r_addend = 0;
6065 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6066 + R_PPC_GOT_TPREL16);
6067 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6068 }
6069 else
6070 {
6071 /* LE */
6072 insn1 = 0x3c620000; /* addis 3,2,0 */
6073 insn2 = 0x38630000; /* addi 3,3,0 */
6074 if (tls_gd == 0)
6075 {
6076 /* Was an LD reloc. */
6077 r_symndx = 0;
6078 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6079 }
6080 r_type = R_PPC_TPREL16_HA;
6081 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6082 rel[1].r_info = ELF32_R_INFO (r_symndx,
6083 R_PPC_TPREL16_LO);
6084 rel[1].r_offset += d_offset;
6085 rel[1].r_addend = rel->r_addend;
6086 }
6087 bfd_put_32 (output_bfd, insn1,
6088 contents + rel->r_offset - d_offset);
6089 bfd_put_32 (output_bfd, insn2, contents + offset);
6090 if (tls_gd == 0)
6091 {
6092 /* We changed the symbol on an LD reloc. Start over
6093 in order to get h, sym, sec etc. right. */
6094 rel--;
6095 continue;
6096 }
6097 }
6098 break;
6099 }
6100
6101 /* Handle other relocations that tweak non-addend part of insn. */
6102 branch_bit = 0;
6103 switch (r_type)
6104 {
6105 default:
6106 break;
6107
6108 /* Branch taken prediction relocations. */
6109 case R_PPC_ADDR14_BRTAKEN:
6110 case R_PPC_REL14_BRTAKEN:
6111 branch_bit = BRANCH_PREDICT_BIT;
6112 /* Fall thru */
6113
6114 /* Branch not taken prediction relocations. */
6115 case R_PPC_ADDR14_BRNTAKEN:
6116 case R_PPC_REL14_BRNTAKEN:
6117 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6118 insn &= ~BRANCH_PREDICT_BIT;
6119 insn |= branch_bit;
6120
6121 from = (rel->r_offset
6122 + input_section->output_offset
6123 + input_section->output_section->vma);
6124
6125 /* Invert 'y' bit if not the default. */
6126 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6127 insn ^= BRANCH_PREDICT_BIT;
6128
6129 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6130 break;
6131 }
6132
6133 addend = rel->r_addend;
6134 tls_type = 0;
6135 howto = NULL;
6136 if (r_type < R_PPC_max)
6137 howto = ppc_elf_howto_table[r_type];
6138 switch (r_type)
6139 {
6140 default:
6141 (*_bfd_error_handler)
6142 (_("%B: unknown relocation type %d for symbol %s"),
6143 input_bfd, (int) r_type, sym_name);
6144
6145 bfd_set_error (bfd_error_bad_value);
6146 ret = FALSE;
6147 continue;
6148
6149 case R_PPC_NONE:
6150 case R_PPC_TLS:
6151 case R_PPC_EMB_MRKREF:
6152 case R_PPC_GNU_VTINHERIT:
6153 case R_PPC_GNU_VTENTRY:
6154 continue;
6155
6156 /* GOT16 relocations. Like an ADDR16 using the symbol's
6157 address in the GOT as relocation value instead of the
6158 symbol's value itself. Also, create a GOT entry for the
6159 symbol and put the symbol value there. */
6160 case R_PPC_GOT_TLSGD16:
6161 case R_PPC_GOT_TLSGD16_LO:
6162 case R_PPC_GOT_TLSGD16_HI:
6163 case R_PPC_GOT_TLSGD16_HA:
6164 tls_type = TLS_TLS | TLS_GD;
6165 goto dogot;
6166
6167 case R_PPC_GOT_TLSLD16:
6168 case R_PPC_GOT_TLSLD16_LO:
6169 case R_PPC_GOT_TLSLD16_HI:
6170 case R_PPC_GOT_TLSLD16_HA:
6171 tls_type = TLS_TLS | TLS_LD;
6172 goto dogot;
6173
6174 case R_PPC_GOT_TPREL16:
6175 case R_PPC_GOT_TPREL16_LO:
6176 case R_PPC_GOT_TPREL16_HI:
6177 case R_PPC_GOT_TPREL16_HA:
6178 tls_type = TLS_TLS | TLS_TPREL;
6179 goto dogot;
6180
6181 case R_PPC_GOT_DTPREL16:
6182 case R_PPC_GOT_DTPREL16_LO:
6183 case R_PPC_GOT_DTPREL16_HI:
6184 case R_PPC_GOT_DTPREL16_HA:
6185 tls_type = TLS_TLS | TLS_DTPREL;
6186 goto dogot;
6187
6188 case R_PPC_GOT16:
6189 case R_PPC_GOT16_LO:
6190 case R_PPC_GOT16_HI:
6191 case R_PPC_GOT16_HA:
6192 dogot:
6193 {
6194 /* Relocation is to the entry for this symbol in the global
6195 offset table. */
6196 bfd_vma off;
6197 bfd_vma *offp;
6198 unsigned long indx;
6199
6200 if (htab->got == NULL)
6201 abort ();
6202
6203 indx = 0;
6204 if (tls_type == (TLS_TLS | TLS_LD)
6205 && (h == NULL
6206 || !h->def_dynamic))
6207 offp = &htab->tlsld_got.offset;
6208 else if (h != NULL)
6209 {
6210 bfd_boolean dyn;
6211 dyn = htab->elf.dynamic_sections_created;
6212 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6213 || (info->shared
6214 && SYMBOL_REFERENCES_LOCAL (info, h)))
6215 /* This is actually a static link, or it is a
6216 -Bsymbolic link and the symbol is defined
6217 locally, or the symbol was forced to be local
6218 because of a version file. */
6219 ;
6220 else
6221 {
6222 indx = h->dynindx;
6223 unresolved_reloc = FALSE;
6224 }
6225 offp = &h->got.offset;
6226 }
6227 else
6228 {
6229 if (local_got_offsets == NULL)
6230 abort ();
6231 offp = &local_got_offsets[r_symndx];
6232 }
6233
6234 /* The offset must always be a multiple of 4. We use the
6235 least significant bit to record whether we have already
6236 processed this entry. */
6237 off = *offp;
6238 if ((off & 1) != 0)
6239 off &= ~1;
6240 else
6241 {
6242 unsigned int tls_m = (tls_mask
6243 & (TLS_LD | TLS_GD | TLS_DTPREL
6244 | TLS_TPREL | TLS_TPRELGD));
6245
6246 if (offp == &htab->tlsld_got.offset)
6247 tls_m = TLS_LD;
6248 else if (h == NULL
6249 || !h->def_dynamic)
6250 tls_m &= ~TLS_LD;
6251
6252 /* We might have multiple got entries for this sym.
6253 Initialize them all. */
6254 do
6255 {
6256 int tls_ty = 0;
6257
6258 if ((tls_m & TLS_LD) != 0)
6259 {
6260 tls_ty = TLS_TLS | TLS_LD;
6261 tls_m &= ~TLS_LD;
6262 }
6263 else if ((tls_m & TLS_GD) != 0)
6264 {
6265 tls_ty = TLS_TLS | TLS_GD;
6266 tls_m &= ~TLS_GD;
6267 }
6268 else if ((tls_m & TLS_DTPREL) != 0)
6269 {
6270 tls_ty = TLS_TLS | TLS_DTPREL;
6271 tls_m &= ~TLS_DTPREL;
6272 }
6273 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6274 {
6275 tls_ty = TLS_TLS | TLS_TPREL;
6276 tls_m = 0;
6277 }
6278
6279 /* Generate relocs for the dynamic linker. */
6280 if ((info->shared || indx != 0)
6281 && (h == NULL
6282 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6283 || h->root.type != bfd_link_hash_undefweak))
6284 {
6285 outrel.r_offset = (htab->got->output_section->vma
6286 + htab->got->output_offset
6287 + off);
6288 outrel.r_addend = 0;
6289 if (tls_ty & (TLS_LD | TLS_GD))
6290 {
6291 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6292 if (tls_ty == (TLS_TLS | TLS_GD))
6293 {
6294 loc = htab->relgot->contents;
6295 loc += (htab->relgot->reloc_count++
6296 * sizeof (Elf32_External_Rela));
6297 bfd_elf32_swap_reloca_out (output_bfd,
6298 &outrel, loc);
6299 outrel.r_offset += 4;
6300 outrel.r_info
6301 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6302 }
6303 }
6304 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6305 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6306 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6307 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6308 else if (indx == 0)
6309 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6310 else
6311 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6312 if (indx == 0)
6313 {
6314 outrel.r_addend += relocation;
6315 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6316 outrel.r_addend -= htab->elf.tls_sec->vma;
6317 }
6318 loc = htab->relgot->contents;
6319 loc += (htab->relgot->reloc_count++
6320 * sizeof (Elf32_External_Rela));
6321 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6322 }
6323
6324 /* Init the .got section contents if we're not
6325 emitting a reloc. */
6326 else
6327 {
6328 bfd_vma value = relocation;
6329
6330 if (tls_ty == (TLS_TLS | TLS_LD))
6331 value = 1;
6332 else if (tls_ty != 0)
6333 {
6334 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6335 if (tls_ty == (TLS_TLS | TLS_TPREL))
6336 value += DTP_OFFSET - TP_OFFSET;
6337
6338 if (tls_ty == (TLS_TLS | TLS_GD))
6339 {
6340 bfd_put_32 (output_bfd, value,
6341 htab->got->contents + off + 4);
6342 value = 1;
6343 }
6344 }
6345 bfd_put_32 (output_bfd, value,
6346 htab->got->contents + off);
6347 }
6348
6349 off += 4;
6350 if (tls_ty & (TLS_LD | TLS_GD))
6351 off += 4;
6352 }
6353 while (tls_m != 0);
6354
6355 off = *offp;
6356 *offp = off | 1;
6357 }
6358
6359 if (off >= (bfd_vma) -2)
6360 abort ();
6361
6362 if ((tls_type & TLS_TLS) != 0)
6363 {
6364 if (tls_type != (TLS_TLS | TLS_LD))
6365 {
6366 if ((tls_mask & TLS_LD) != 0
6367 && !(h == NULL
6368 || !h->def_dynamic))
6369 off += 8;
6370 if (tls_type != (TLS_TLS | TLS_GD))
6371 {
6372 if ((tls_mask & TLS_GD) != 0)
6373 off += 8;
6374 if (tls_type != (TLS_TLS | TLS_DTPREL))
6375 {
6376 if ((tls_mask & TLS_DTPREL) != 0)
6377 off += 4;
6378 }
6379 }
6380 }
6381 }
6382
6383 relocation = htab->got->output_offset + off;
6384 relocation -= htab->elf.hgot->root.u.def.value;
6385
6386 /* Addends on got relocations don't make much sense.
6387 x+off@got is actually x@got+off, and since the got is
6388 generated by a hash table traversal, the value in the
6389 got at entry m+n bears little relation to the entry m. */
6390 if (addend != 0)
6391 (*_bfd_error_handler)
6392 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6393 input_bfd,
6394 input_section,
6395 (long) rel->r_offset,
6396 howto->name,
6397 sym_name);
6398 }
6399 break;
6400
6401 /* Relocations that need no special processing. */
6402 case R_PPC_LOCAL24PC:
6403 /* It makes no sense to point a local relocation
6404 at a symbol not in this object. */
6405 if (unresolved_reloc)
6406 {
6407 if (! (*info->callbacks->undefined_symbol) (info,
6408 h->root.root.string,
6409 input_bfd,
6410 input_section,
6411 rel->r_offset,
6412 TRUE))
6413 return FALSE;
6414 continue;
6415 }
6416 break;
6417
6418 case R_PPC_DTPREL16:
6419 case R_PPC_DTPREL16_LO:
6420 case R_PPC_DTPREL16_HI:
6421 case R_PPC_DTPREL16_HA:
6422 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6423 break;
6424
6425 /* Relocations that may need to be propagated if this is a shared
6426 object. */
6427 case R_PPC_TPREL16:
6428 case R_PPC_TPREL16_LO:
6429 case R_PPC_TPREL16_HI:
6430 case R_PPC_TPREL16_HA:
6431 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6432 /* The TPREL16 relocs shouldn't really be used in shared
6433 libs as they will result in DT_TEXTREL being set, but
6434 support them anyway. */
6435 goto dodyn;
6436
6437 case R_PPC_TPREL32:
6438 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6439 goto dodyn;
6440
6441 case R_PPC_DTPREL32:
6442 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6443 goto dodyn;
6444
6445 case R_PPC_DTPMOD32:
6446 relocation = 1;
6447 addend = 0;
6448 goto dodyn;
6449
6450 case R_PPC_REL16:
6451 case R_PPC_REL16_LO:
6452 case R_PPC_REL16_HI:
6453 case R_PPC_REL16_HA:
6454 break;
6455
6456 case R_PPC_REL32:
6457 if (h == NULL || h == htab->elf.hgot)
6458 break;
6459 /* fall through */
6460
6461 case R_PPC_ADDR32:
6462 case R_PPC_ADDR16:
6463 case R_PPC_ADDR16_LO:
6464 case R_PPC_ADDR16_HI:
6465 case R_PPC_ADDR16_HA:
6466 case R_PPC_UADDR32:
6467 case R_PPC_UADDR16:
6468 goto dodyn;
6469
6470 case R_PPC_REL24:
6471 case R_PPC_REL14:
6472 case R_PPC_REL14_BRTAKEN:
6473 case R_PPC_REL14_BRNTAKEN:
6474 /* If these relocations are not to a named symbol, they can be
6475 handled right here, no need to bother the dynamic linker. */
6476 if (SYMBOL_CALLS_LOCAL (info, h)
6477 || h == htab->elf.hgot)
6478 break;
6479 /* fall through */
6480
6481 case R_PPC_ADDR24:
6482 case R_PPC_ADDR14:
6483 case R_PPC_ADDR14_BRTAKEN:
6484 case R_PPC_ADDR14_BRNTAKEN:
6485 if (h != NULL && !info->shared)
6486 break;
6487 /* fall through */
6488
6489 dodyn:
6490 if ((input_section->flags & SEC_ALLOC) == 0
6491 || is_vxworks_tls)
6492 break;
6493
6494 if ((info->shared
6495 && !(h != NULL
6496 && ((h->root.type == bfd_link_hash_undefined
6497 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6498 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6499 || (h->root.type == bfd_link_hash_undefweak
6500 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
6501 && (MUST_BE_DYN_RELOC (r_type)
6502 || !SYMBOL_CALLS_LOCAL (info, h)))
6503 || (ELIMINATE_COPY_RELOCS
6504 && !info->shared
6505 && h != NULL
6506 && h->dynindx != -1
6507 && !h->non_got_ref
6508 && !h->def_regular))
6509 {
6510 int skip;
6511
6512 #ifdef DEBUG
6513 fprintf (stderr, "ppc_elf_relocate_section needs to "
6514 "create relocation for %s\n",
6515 (h && h->root.root.string
6516 ? h->root.root.string : "<unknown>"));
6517 #endif
6518
6519 /* When generating a shared object, these relocations
6520 are copied into the output file to be resolved at run
6521 time. */
6522 if (sreloc == NULL)
6523 {
6524 const char *name;
6525
6526 name = (bfd_elf_string_from_elf_section
6527 (input_bfd,
6528 elf_elfheader (input_bfd)->e_shstrndx,
6529 elf_section_data (input_section)->rel_hdr.sh_name));
6530 if (name == NULL)
6531 return FALSE;
6532
6533 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6534 && strcmp (bfd_get_section_name (input_bfd,
6535 input_section),
6536 name + 5) == 0);
6537
6538 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6539 BFD_ASSERT (sreloc != NULL);
6540 }
6541
6542 skip = 0;
6543 outrel.r_offset =
6544 _bfd_elf_section_offset (output_bfd, info, input_section,
6545 rel->r_offset);
6546 if (outrel.r_offset == (bfd_vma) -1
6547 || outrel.r_offset == (bfd_vma) -2)
6548 skip = (int) outrel.r_offset;
6549 outrel.r_offset += (input_section->output_section->vma
6550 + input_section->output_offset);
6551
6552 if (skip)
6553 memset (&outrel, 0, sizeof outrel);
6554 else if ((h != NULL
6555 && (h->root.type == bfd_link_hash_undefined
6556 || h->root.type == bfd_link_hash_undefweak))
6557 || !SYMBOL_REFERENCES_LOCAL (info, h))
6558 {
6559 unresolved_reloc = FALSE;
6560 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6561 outrel.r_addend = rel->r_addend;
6562 }
6563 else
6564 {
6565 outrel.r_addend = relocation + rel->r_addend;
6566
6567 if (r_type == R_PPC_ADDR32)
6568 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6569 else
6570 {
6571 long indx = 0;
6572
6573 if (bfd_is_abs_section (sec))
6574 ;
6575 else if (sec == NULL || sec->owner == NULL)
6576 {
6577 bfd_set_error (bfd_error_bad_value);
6578 ret = FALSE;
6579 }
6580 else
6581 {
6582 asection *osec;
6583
6584 /* We are turning this relocation into one
6585 against a section symbol. It would be
6586 proper to subtract the symbol's value,
6587 osec->vma, from the emitted reloc addend,
6588 but ld.so expects buggy relocs. */
6589 osec = sec->output_section;
6590 indx = elf_section_data (osec)->dynindx;
6591 if (indx == 0)
6592 {
6593 osec = htab->elf.text_index_section;
6594 indx = elf_section_data (osec)->dynindx;
6595 }
6596 BFD_ASSERT (indx != 0);
6597 #ifdef DEBUG
6598 if (indx == 0)
6599 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6600 indx, osec->name, osec->flags,
6601 h->root.root.string);
6602 #endif
6603 }
6604
6605 outrel.r_info = ELF32_R_INFO (indx, r_type);
6606 }
6607 }
6608
6609 loc = sreloc->contents;
6610 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6611 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6612
6613 if (skip == -1)
6614 continue;
6615
6616 /* This reloc will be computed at runtime. We clear the memory
6617 so that it contains predictable value. */
6618 if (! skip
6619 && ((input_section->flags & SEC_ALLOC) != 0
6620 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6621 {
6622 relocation = howto->pc_relative ? outrel.r_offset : 0;
6623 addend = 0;
6624 break;
6625 }
6626 }
6627 break;
6628
6629 case R_PPC_RELAX32PC_PLT:
6630 case R_PPC_RELAX32_PLT:
6631 {
6632 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6633
6634 if (htab->plt_type == PLT_NEW)
6635 relocation = (htab->glink->output_section->vma
6636 + htab->glink->output_offset
6637 + ent->glink_offset);
6638 else
6639 relocation = (htab->plt->output_section->vma
6640 + htab->plt->output_offset
6641 + ent->plt.offset);
6642 addend = 0;
6643 }
6644 if (r_type == R_PPC_RELAX32_PLT)
6645 goto relax32;
6646 /* Fall thru */
6647
6648 case R_PPC_RELAX32PC:
6649 relocation -= (input_section->output_section->vma
6650 + input_section->output_offset
6651 + rel->r_offset - 4);
6652 /* Fall thru */
6653
6654 case R_PPC_RELAX32:
6655 relax32:
6656 {
6657 unsigned long t0;
6658 unsigned long t1;
6659
6660 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6661 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6662
6663 /* We're clearing the bits for R_PPC_ADDR16_HA
6664 and R_PPC_ADDR16_LO here. */
6665 t0 &= ~0xffff;
6666 t1 &= ~0xffff;
6667
6668 /* t0 is HA, t1 is LO */
6669 relocation += addend;
6670 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6671 t1 |= relocation & 0xffff;
6672
6673 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6674 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6675 }
6676 continue;
6677
6678 /* Indirect .sdata relocation. */
6679 case R_PPC_EMB_SDAI16:
6680 BFD_ASSERT (htab->sdata[0].section != NULL);
6681 relocation
6682 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6683 h, relocation, rel);
6684 break;
6685
6686 /* Indirect .sdata2 relocation. */
6687 case R_PPC_EMB_SDA2I16:
6688 BFD_ASSERT (htab->sdata[1].section != NULL);
6689 relocation
6690 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6691 h, relocation, rel);
6692 break;
6693
6694 /* Handle the TOC16 reloc. We want to use the offset within the .got
6695 section, not the actual VMA. This is appropriate when generating
6696 an embedded ELF object, for which the .got section acts like the
6697 AIX .toc section. */
6698 case R_PPC_TOC16: /* phony GOT16 relocations */
6699 BFD_ASSERT (sec != NULL);
6700 BFD_ASSERT (bfd_is_und_section (sec)
6701 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6702 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6703
6704 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6705 break;
6706
6707 case R_PPC_PLTREL24:
6708 /* Relocation is to the entry for this symbol in the
6709 procedure linkage table. */
6710 {
6711 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6712
6713 addend = 0;
6714 if (ent == NULL
6715 || htab->plt == NULL)
6716 {
6717 /* We didn't make a PLT entry for this symbol. This
6718 happens when statically linking PIC code, or when
6719 using -Bsymbolic. */
6720 break;
6721 }
6722
6723 unresolved_reloc = FALSE;
6724 if (htab->plt_type == PLT_NEW)
6725 relocation = (htab->glink->output_section->vma
6726 + htab->glink->output_offset
6727 + ent->glink_offset);
6728 else
6729 relocation = (htab->plt->output_section->vma
6730 + htab->plt->output_offset
6731 + ent->plt.offset);
6732 }
6733 break;
6734
6735 /* Relocate against _SDA_BASE_. */
6736 case R_PPC_SDAREL16:
6737 {
6738 const char *name;
6739 struct elf_link_hash_entry *sh;
6740
6741 BFD_ASSERT (sec != NULL);
6742 name = bfd_get_section_name (abfd, sec->output_section);
6743 if (! ((CONST_STRNEQ (name, ".sdata")
6744 && (name[6] == 0 || name[6] == '.'))
6745 || (CONST_STRNEQ (name, ".sbss")
6746 && (name[5] == 0 || name[5] == '.'))))
6747 {
6748 (*_bfd_error_handler)
6749 (_("%B: the target (%s) of a %s relocation is "
6750 "in the wrong output section (%s)"),
6751 input_bfd,
6752 sym_name,
6753 howto->name,
6754 name);
6755 }
6756 sh = htab->sdata[0].sym;
6757 addend -= (sh->root.u.def.value
6758 + sh->root.u.def.section->output_offset
6759 + sh->root.u.def.section->output_section->vma);
6760 }
6761 break;
6762
6763 /* Relocate against _SDA2_BASE_. */
6764 case R_PPC_EMB_SDA2REL:
6765 {
6766 const char *name;
6767 struct elf_link_hash_entry *sh;
6768
6769 BFD_ASSERT (sec != NULL);
6770 name = bfd_get_section_name (abfd, sec->output_section);
6771 if (! (CONST_STRNEQ (name, ".sdata2")
6772 || CONST_STRNEQ (name, ".sbss2")))
6773 {
6774 (*_bfd_error_handler)
6775 (_("%B: the target (%s) of a %s relocation is "
6776 "in the wrong output section (%s)"),
6777 input_bfd,
6778 sym_name,
6779 howto->name,
6780 name);
6781
6782 bfd_set_error (bfd_error_bad_value);
6783 ret = FALSE;
6784 continue;
6785 }
6786 sh = htab->sdata[1].sym;
6787 addend -= (sh->root.u.def.value
6788 + sh->root.u.def.section->output_offset
6789 + sh->root.u.def.section->output_section->vma);
6790 }
6791 break;
6792
6793 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6794 case R_PPC_EMB_SDA21:
6795 case R_PPC_EMB_RELSDA:
6796 {
6797 const char *name;
6798 int reg;
6799 struct elf_link_hash_entry *sh;
6800
6801 BFD_ASSERT (sec != NULL);
6802 name = bfd_get_section_name (abfd, sec->output_section);
6803 if (((CONST_STRNEQ (name, ".sdata")
6804 && (name[6] == 0 || name[6] == '.'))
6805 || (CONST_STRNEQ (name, ".sbss")
6806 && (name[5] == 0 || name[5] == '.'))))
6807 {
6808 reg = 13;
6809 sh = htab->sdata[0].sym;
6810 addend -= (sh->root.u.def.value
6811 + sh->root.u.def.section->output_offset
6812 + sh->root.u.def.section->output_section->vma);
6813 }
6814
6815 else if (CONST_STRNEQ (name, ".sdata2")
6816 || CONST_STRNEQ (name, ".sbss2"))
6817 {
6818 reg = 2;
6819 sh = htab->sdata[1].sym;
6820 addend -= (sh->root.u.def.value
6821 + sh->root.u.def.section->output_offset
6822 + sh->root.u.def.section->output_section->vma);
6823 }
6824
6825 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6826 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6827 {
6828 reg = 0;
6829 }
6830
6831 else
6832 {
6833 (*_bfd_error_handler)
6834 (_("%B: the target (%s) of a %s relocation is "
6835 "in the wrong output section (%s)"),
6836 input_bfd,
6837 sym_name,
6838 howto->name,
6839 name);
6840
6841 bfd_set_error (bfd_error_bad_value);
6842 ret = FALSE;
6843 continue;
6844 }
6845
6846 if (r_type == R_PPC_EMB_SDA21)
6847 { /* fill in register field */
6848 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6849 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6850 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6851 }
6852 }
6853 break;
6854
6855 /* Relocate against the beginning of the section. */
6856 case R_PPC_SECTOFF:
6857 case R_PPC_SECTOFF_LO:
6858 case R_PPC_SECTOFF_HI:
6859 case R_PPC_SECTOFF_HA:
6860 BFD_ASSERT (sec != NULL);
6861 addend -= sec->output_section->vma;
6862 break;
6863
6864 /* Negative relocations. */
6865 case R_PPC_EMB_NADDR32:
6866 case R_PPC_EMB_NADDR16:
6867 case R_PPC_EMB_NADDR16_LO:
6868 case R_PPC_EMB_NADDR16_HI:
6869 case R_PPC_EMB_NADDR16_HA:
6870 addend -= 2 * relocation;
6871 break;
6872
6873 case R_PPC_COPY:
6874 case R_PPC_GLOB_DAT:
6875 case R_PPC_JMP_SLOT:
6876 case R_PPC_RELATIVE:
6877 case R_PPC_PLT32:
6878 case R_PPC_PLTREL32:
6879 case R_PPC_PLT16_LO:
6880 case R_PPC_PLT16_HI:
6881 case R_PPC_PLT16_HA:
6882 case R_PPC_ADDR30:
6883 case R_PPC_EMB_RELSEC16:
6884 case R_PPC_EMB_RELST_LO:
6885 case R_PPC_EMB_RELST_HI:
6886 case R_PPC_EMB_RELST_HA:
6887 case R_PPC_EMB_BIT_FLD:
6888 (*_bfd_error_handler)
6889 (_("%B: relocation %s is not yet supported for symbol %s."),
6890 input_bfd,
6891 howto->name,
6892 sym_name);
6893
6894 bfd_set_error (bfd_error_invalid_operation);
6895 ret = FALSE;
6896 continue;
6897 }
6898
6899 /* Do any further special processing. */
6900 switch (r_type)
6901 {
6902 default:
6903 break;
6904
6905 case R_PPC_ADDR16_HA:
6906 case R_PPC_REL16_HA:
6907 case R_PPC_SECTOFF_HA:
6908 case R_PPC_TPREL16_HA:
6909 case R_PPC_DTPREL16_HA:
6910 case R_PPC_EMB_NADDR16_HA:
6911 case R_PPC_EMB_RELST_HA:
6912 /* It's just possible that this symbol is a weak symbol
6913 that's not actually defined anywhere. In that case,
6914 'sec' would be NULL, and we should leave the symbol
6915 alone (it will be set to zero elsewhere in the link). */
6916 if (sec == NULL)
6917 break;
6918 /* Fall thru */
6919
6920 case R_PPC_PLT16_HA:
6921 case R_PPC_GOT16_HA:
6922 case R_PPC_GOT_TLSGD16_HA:
6923 case R_PPC_GOT_TLSLD16_HA:
6924 case R_PPC_GOT_TPREL16_HA:
6925 case R_PPC_GOT_DTPREL16_HA:
6926 /* Add 0x10000 if sign bit in 0:15 is set.
6927 Bits 0:15 are not used. */
6928 addend += 0x8000;
6929 break;
6930 }
6931
6932 #ifdef DEBUG
6933 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6934 "offset = %ld, addend = %ld\n",
6935 howto->name,
6936 (int) r_type,
6937 sym_name,
6938 r_symndx,
6939 (long) rel->r_offset,
6940 (long) addend);
6941 #endif
6942
6943 if (unresolved_reloc
6944 && !((input_section->flags & SEC_DEBUGGING) != 0
6945 && h->def_dynamic))
6946 {
6947 (*_bfd_error_handler)
6948 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6949 input_bfd,
6950 input_section,
6951 (long) rel->r_offset,
6952 howto->name,
6953 sym_name);
6954 ret = FALSE;
6955 }
6956
6957 r = _bfd_final_link_relocate (howto,
6958 input_bfd,
6959 input_section,
6960 contents,
6961 rel->r_offset,
6962 relocation,
6963 addend);
6964
6965 if (r != bfd_reloc_ok)
6966 {
6967 if (r == bfd_reloc_overflow)
6968 {
6969 if (warned)
6970 continue;
6971 if (h != NULL
6972 && h->root.type == bfd_link_hash_undefweak
6973 && howto->pc_relative)
6974 {
6975 /* Assume this is a call protected by other code that
6976 detect the symbol is undefined. If this is the case,
6977 we can safely ignore the overflow. If not, the
6978 program is hosed anyway, and a little warning isn't
6979 going to help. */
6980
6981 continue;
6982 }
6983
6984 if (! (*info->callbacks->reloc_overflow) (info,
6985 (h ? &h->root : NULL),
6986 sym_name,
6987 howto->name,
6988 rel->r_addend,
6989 input_bfd,
6990 input_section,
6991 rel->r_offset))
6992 return FALSE;
6993 }
6994 else
6995 {
6996 (*_bfd_error_handler)
6997 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6998 input_bfd, input_section,
6999 (long) rel->r_offset, howto->name, sym_name, (int) r);
7000 ret = FALSE;
7001 }
7002 }
7003 }
7004
7005 #ifdef DEBUG
7006 fprintf (stderr, "\n");
7007 #endif
7008
7009 return ret;
7010 }
7011 \f
7012 #define PPC_LO(v) ((v) & 0xffff)
7013 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7014 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7015
7016 /* Finish up dynamic symbol handling. We set the contents of various
7017 dynamic sections here. */
7018
7019 static bfd_boolean
7020 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7021 struct bfd_link_info *info,
7022 struct elf_link_hash_entry *h,
7023 Elf_Internal_Sym *sym)
7024 {
7025 struct ppc_elf_link_hash_table *htab;
7026 struct plt_entry *ent;
7027 bfd_boolean doneone;
7028
7029 #ifdef DEBUG
7030 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7031 h->root.root.string);
7032 #endif
7033
7034 htab = ppc_elf_hash_table (info);
7035 BFD_ASSERT (htab->elf.dynobj != NULL);
7036
7037 doneone = FALSE;
7038 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7039 if (ent->plt.offset != (bfd_vma) -1)
7040 {
7041 if (!doneone)
7042 {
7043 Elf_Internal_Rela rela;
7044 bfd_byte *loc;
7045 bfd_vma reloc_index;
7046
7047 if (htab->plt_type == PLT_NEW)
7048 reloc_index = ent->plt.offset / 4;
7049 else
7050 {
7051 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7052 / htab->plt_slot_size);
7053 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7054 && htab->plt_type == PLT_OLD)
7055 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7056 }
7057
7058 /* This symbol has an entry in the procedure linkage table.
7059 Set it up. */
7060 if (htab->plt_type == PLT_VXWORKS)
7061 {
7062 bfd_vma got_offset;
7063 const bfd_vma *plt_entry;
7064
7065 /* The first three entries in .got.plt are reserved. */
7066 got_offset = (reloc_index + 3) * 4;
7067
7068 /* Use the right PLT. */
7069 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7070 : ppc_elf_vxworks_plt_entry;
7071
7072 /* Fill in the .plt on VxWorks. */
7073 if (info->shared)
7074 {
7075 bfd_vma got_offset_hi = (got_offset >> 16)
7076 + ((got_offset & 0x8000) >> 15);
7077
7078 bfd_put_32 (output_bfd,
7079 plt_entry[0] | (got_offset_hi & 0xffff),
7080 htab->plt->contents + ent->plt.offset + 0);
7081 bfd_put_32 (output_bfd,
7082 plt_entry[1] | (got_offset & 0xffff),
7083 htab->plt->contents + ent->plt.offset + 4);
7084 }
7085 else
7086 {
7087 bfd_vma got_loc
7088 = (got_offset
7089 + htab->elf.hgot->root.u.def.value
7090 + htab->elf.hgot->root.u.def.section->output_offset
7091 + htab->elf.hgot->root.u.def.section->output_section->vma);
7092 bfd_vma got_loc_hi = (got_loc >> 16)
7093 + ((got_loc & 0x8000) >> 15);
7094
7095 bfd_put_32 (output_bfd,
7096 plt_entry[0] | (got_loc_hi & 0xffff),
7097 htab->plt->contents + ent->plt.offset + 0);
7098 bfd_put_32 (output_bfd,
7099 plt_entry[1] | (got_loc & 0xffff),
7100 htab->plt->contents + ent->plt.offset + 4);
7101 }
7102
7103 bfd_put_32 (output_bfd, plt_entry[2],
7104 htab->plt->contents + ent->plt.offset + 8);
7105 bfd_put_32 (output_bfd, plt_entry[3],
7106 htab->plt->contents + ent->plt.offset + 12);
7107
7108 /* This instruction is an immediate load. The value loaded is
7109 the byte offset of the R_PPC_JMP_SLOT relocation from the
7110 start of the .rela.plt section. The value is stored in the
7111 low-order 16 bits of the load instruction. */
7112 /* NOTE: It appears that this is now an index rather than a
7113 prescaled offset. */
7114 bfd_put_32 (output_bfd,
7115 plt_entry[4] | reloc_index,
7116 htab->plt->contents + ent->plt.offset + 16);
7117 /* This instruction is a PC-relative branch whose target is
7118 the start of the PLT section. The address of this branch
7119 instruction is 20 bytes beyond the start of this PLT entry.
7120 The address is encoded in bits 6-29, inclusive. The value
7121 stored is right-shifted by two bits, permitting a 26-bit
7122 offset. */
7123 bfd_put_32 (output_bfd,
7124 (plt_entry[5]
7125 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7126 htab->plt->contents + ent->plt.offset + 20);
7127 bfd_put_32 (output_bfd, plt_entry[6],
7128 htab->plt->contents + ent->plt.offset + 24);
7129 bfd_put_32 (output_bfd, plt_entry[7],
7130 htab->plt->contents + ent->plt.offset + 28);
7131
7132 /* Fill in the GOT entry corresponding to this PLT slot with
7133 the address immediately after the the "bctr" instruction
7134 in this PLT entry. */
7135 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7136 + htab->plt->output_offset
7137 + ent->plt.offset + 16),
7138 htab->sgotplt->contents + got_offset);
7139
7140 if (!info->shared)
7141 {
7142 /* Fill in a couple of entries in .rela.plt.unloaded. */
7143 loc = htab->srelplt2->contents
7144 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7145 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7146 * sizeof (Elf32_External_Rela));
7147
7148 /* Provide the @ha relocation for the first instruction. */
7149 rela.r_offset = (htab->plt->output_section->vma
7150 + htab->plt->output_offset
7151 + ent->plt.offset + 2);
7152 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7153 R_PPC_ADDR16_HA);
7154 rela.r_addend = got_offset;
7155 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7156 loc += sizeof (Elf32_External_Rela);
7157
7158 /* Provide the @l relocation for the second instruction. */
7159 rela.r_offset = (htab->plt->output_section->vma
7160 + htab->plt->output_offset
7161 + ent->plt.offset + 6);
7162 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7163 R_PPC_ADDR16_LO);
7164 rela.r_addend = got_offset;
7165 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7166 loc += sizeof (Elf32_External_Rela);
7167
7168 /* Provide a relocation for the GOT entry corresponding to this
7169 PLT slot. Point it at the middle of the .plt entry. */
7170 rela.r_offset = (htab->sgotplt->output_section->vma
7171 + htab->sgotplt->output_offset
7172 + got_offset);
7173 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7174 R_PPC_ADDR32);
7175 rela.r_addend = ent->plt.offset + 16;
7176 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7177 }
7178
7179 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7180 In particular, the offset for the relocation is not the
7181 address of the PLT entry for this function, as specified
7182 by the ABI. Instead, the offset is set to the address of
7183 the GOT slot for this function. See EABI 4.4.4.1. */
7184 rela.r_offset = (htab->sgotplt->output_section->vma
7185 + htab->sgotplt->output_offset
7186 + got_offset);
7187
7188 }
7189 else
7190 {
7191 rela.r_offset = (htab->plt->output_section->vma
7192 + htab->plt->output_offset
7193 + ent->plt.offset);
7194 if (htab->plt_type == PLT_OLD)
7195 {
7196 /* We don't need to fill in the .plt. The ppc dynamic
7197 linker will fill it in. */
7198 }
7199 else
7200 {
7201 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7202 + htab->glink->output_section->vma
7203 + htab->glink->output_offset);
7204 bfd_put_32 (output_bfd, val,
7205 htab->plt->contents + ent->plt.offset);
7206 }
7207 }
7208
7209 /* Fill in the entry in the .rela.plt section. */
7210 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7211 rela.r_addend = 0;
7212
7213 loc = (htab->relplt->contents
7214 + reloc_index * sizeof (Elf32_External_Rela));
7215 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7216
7217 if (!h->def_regular)
7218 {
7219 /* Mark the symbol as undefined, rather than as
7220 defined in the .plt section. Leave the value if
7221 there were any relocations where pointer equality
7222 matters (this is a clue for the dynamic linker, to
7223 make function pointer comparisons work between an
7224 application and shared library), otherwise set it
7225 to zero. */
7226 sym->st_shndx = SHN_UNDEF;
7227 if (!h->pointer_equality_needed)
7228 sym->st_value = 0;
7229 else if (!h->ref_regular_nonweak)
7230 {
7231 /* This breaks function pointer comparisons, but
7232 that is better than breaking tests for a NULL
7233 function pointer. */
7234 sym->st_value = 0;
7235 }
7236 }
7237 doneone = TRUE;
7238 }
7239
7240 if (htab->plt_type == PLT_NEW)
7241 {
7242 bfd_vma plt;
7243 unsigned char *p;
7244
7245 plt = (ent->plt.offset
7246 + htab->plt->output_section->vma
7247 + htab->plt->output_offset);
7248 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7249
7250 if (info->shared || info->pie)
7251 {
7252 bfd_vma got = 0;
7253
7254 if (ent->addend >= 32768)
7255 got = (ent->addend
7256 + ent->sec->output_section->vma
7257 + ent->sec->output_offset);
7258 else if (htab->elf.hgot != NULL)
7259 got = (htab->elf.hgot->root.u.def.value
7260 + htab->elf.hgot->root.u.def.section->output_section->vma
7261 + htab->elf.hgot->root.u.def.section->output_offset);
7262
7263 plt -= got;
7264
7265 if (plt + 0x8000 < 0x10000)
7266 {
7267 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7268 p += 4;
7269 bfd_put_32 (output_bfd, MTCTR_11, p);
7270 p += 4;
7271 bfd_put_32 (output_bfd, BCTR, p);
7272 p += 4;
7273 bfd_put_32 (output_bfd, NOP, p);
7274 p += 4;
7275 }
7276 else
7277 {
7278 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7279 p += 4;
7280 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7281 p += 4;
7282 bfd_put_32 (output_bfd, MTCTR_11, p);
7283 p += 4;
7284 bfd_put_32 (output_bfd, BCTR, p);
7285 p += 4;
7286 }
7287 }
7288 else
7289 {
7290 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7291 p += 4;
7292 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7293 p += 4;
7294 bfd_put_32 (output_bfd, MTCTR_11, p);
7295 p += 4;
7296 bfd_put_32 (output_bfd, BCTR, p);
7297 p += 4;
7298
7299 /* We only need one non-PIC glink stub. */
7300 break;
7301 }
7302 }
7303 else
7304 break;
7305 }
7306
7307 if (h->needs_copy)
7308 {
7309 asection *s;
7310 Elf_Internal_Rela rela;
7311 bfd_byte *loc;
7312
7313 /* This symbols needs a copy reloc. Set it up. */
7314
7315 #ifdef DEBUG
7316 fprintf (stderr, ", copy");
7317 #endif
7318
7319 BFD_ASSERT (h->dynindx != -1);
7320
7321 if (ppc_elf_hash_entry (h)->has_sda_refs)
7322 s = htab->relsbss;
7323 else
7324 s = htab->relbss;
7325 BFD_ASSERT (s != NULL);
7326
7327 rela.r_offset = (h->root.u.def.value
7328 + h->root.u.def.section->output_section->vma
7329 + h->root.u.def.section->output_offset);
7330 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7331 rela.r_addend = 0;
7332 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7333 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7334 }
7335
7336 #ifdef DEBUG
7337 fprintf (stderr, "\n");
7338 #endif
7339
7340 /* Mark some specially defined symbols as absolute. */
7341 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7342 || (!htab->is_vxworks
7343 && (h == htab->elf.hgot
7344 || strcmp (h->root.root.string,
7345 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7346 sym->st_shndx = SHN_ABS;
7347
7348 return TRUE;
7349 }
7350 \f
7351 static enum elf_reloc_type_class
7352 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7353 {
7354 switch (ELF32_R_TYPE (rela->r_info))
7355 {
7356 case R_PPC_RELATIVE:
7357 return reloc_class_relative;
7358 case R_PPC_REL24:
7359 case R_PPC_ADDR24:
7360 case R_PPC_JMP_SLOT:
7361 return reloc_class_plt;
7362 case R_PPC_COPY:
7363 return reloc_class_copy;
7364 default:
7365 return reloc_class_normal;
7366 }
7367 }
7368 \f
7369 /* Finish up the dynamic sections. */
7370
7371 static bfd_boolean
7372 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7373 struct bfd_link_info *info)
7374 {
7375 asection *sdyn;
7376 asection *splt;
7377 struct ppc_elf_link_hash_table *htab;
7378 bfd_vma got;
7379 bfd * dynobj;
7380
7381 #ifdef DEBUG
7382 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7383 #endif
7384
7385 htab = ppc_elf_hash_table (info);
7386 dynobj = elf_hash_table (info)->dynobj;
7387 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7388 if (htab->is_vxworks)
7389 splt = bfd_get_section_by_name (dynobj, ".plt");
7390 else
7391 splt = NULL;
7392
7393 got = 0;
7394 if (htab->elf.hgot != NULL)
7395 got = (htab->elf.hgot->root.u.def.value
7396 + htab->elf.hgot->root.u.def.section->output_section->vma
7397 + htab->elf.hgot->root.u.def.section->output_offset);
7398
7399 if (htab->elf.dynamic_sections_created)
7400 {
7401 Elf32_External_Dyn *dyncon, *dynconend;
7402
7403 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7404
7405 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7406 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7407 for (; dyncon < dynconend; dyncon++)
7408 {
7409 Elf_Internal_Dyn dyn;
7410 asection *s;
7411
7412 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7413
7414 switch (dyn.d_tag)
7415 {
7416 case DT_PLTGOT:
7417 if (htab->is_vxworks)
7418 s = htab->sgotplt;
7419 else
7420 s = htab->plt;
7421 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7422 break;
7423
7424 case DT_PLTRELSZ:
7425 dyn.d_un.d_val = htab->relplt->size;
7426 break;
7427
7428 case DT_JMPREL:
7429 s = htab->relplt;
7430 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7431 break;
7432
7433 case DT_PPC_GOT:
7434 dyn.d_un.d_ptr = got;
7435 break;
7436
7437 case DT_RELASZ:
7438 if (htab->is_vxworks)
7439 {
7440 if (htab->relplt)
7441 dyn.d_un.d_ptr -= htab->relplt->size;
7442 break;
7443 }
7444 continue;
7445
7446 default:
7447 if (htab->is_vxworks
7448 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7449 break;
7450 continue;
7451 }
7452
7453 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7454 }
7455 }
7456
7457 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7458 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7459 if (htab->got != NULL)
7460 {
7461 unsigned char *p = htab->got->contents;
7462 bfd_vma val;
7463
7464 p += htab->elf.hgot->root.u.def.value;
7465 if (htab->plt_type == PLT_OLD)
7466 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7467
7468 val = 0;
7469 if (sdyn != NULL)
7470 val = sdyn->output_section->vma + sdyn->output_offset;
7471 bfd_put_32 (output_bfd, val, p);
7472
7473 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7474 }
7475
7476 /* Fill in the first entry in the VxWorks procedure linkage table. */
7477 if (splt && splt->size > 0)
7478 {
7479 /* Use the right PLT. */
7480 static const bfd_vma *plt_entry = NULL;
7481 plt_entry = info->shared ?
7482 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7483
7484 if (!info->shared)
7485 {
7486 bfd_vma got_value =
7487 (htab->elf.hgot->root.u.def.section->output_section->vma
7488 + htab->elf.hgot->root.u.def.section->output_offset
7489 + htab->elf.hgot->root.u.def.value);
7490 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7491
7492 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7493 splt->contents + 0);
7494 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7495 splt->contents + 4);
7496 }
7497 else
7498 {
7499 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7500 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7501 }
7502 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7503 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7504 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7505 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7506 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7507 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7508
7509 if (! info->shared)
7510 {
7511 Elf_Internal_Rela rela;
7512 bfd_byte *loc;
7513
7514 loc = htab->srelplt2->contents;
7515
7516 /* Output the @ha relocation for the first instruction. */
7517 rela.r_offset = (htab->plt->output_section->vma
7518 + htab->plt->output_offset
7519 + 2);
7520 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7521 rela.r_addend = 0;
7522 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7523 loc += sizeof (Elf32_External_Rela);
7524
7525 /* Output the @l relocation for the second instruction. */
7526 rela.r_offset = (htab->plt->output_section->vma
7527 + htab->plt->output_offset
7528 + 6);
7529 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7530 rela.r_addend = 0;
7531 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7532 loc += sizeof (Elf32_External_Rela);
7533
7534 /* Fix up the remaining relocations. They may have the wrong
7535 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7536 in which symbols were output. */
7537 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7538 {
7539 Elf_Internal_Rela rel;
7540
7541 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7542 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7543 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7544 loc += sizeof (Elf32_External_Rela);
7545
7546 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7547 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7548 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7549 loc += sizeof (Elf32_External_Rela);
7550
7551 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7552 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7553 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7554 loc += sizeof (Elf32_External_Rela);
7555 }
7556 }
7557 }
7558
7559 if (htab->glink != NULL && htab->glink->contents != NULL)
7560 {
7561 unsigned char *p;
7562 unsigned char *endp;
7563 bfd_vma res0;
7564 unsigned int i;
7565
7566 /*
7567 * PIC glink code is the following:
7568 *
7569 * # ith PLT code stub.
7570 * addis 11,30,(plt+(i-1)*4-got)@ha
7571 * lwz 11,(plt+(i-1)*4-got)@l(11)
7572 * mtctr 11
7573 * bctr
7574 *
7575 * # A table of branches, one for each plt entry.
7576 * # The idea is that the plt call stub loads ctr and r11 with these
7577 * # addresses, so (r11 - res_0) gives the plt index * 4.
7578 * res_0: b PLTresolve
7579 * res_1: b PLTresolve
7580 * .
7581 * # Some number of entries towards the end can be nops
7582 * res_n_m3: nop
7583 * res_n_m2: nop
7584 * res_n_m1:
7585 *
7586 * PLTresolve:
7587 * addis 11,11,(1f-res_0)@ha
7588 * mflr 0
7589 * bcl 20,31,1f
7590 * 1: addi 11,11,(1b-res_0)@l
7591 * mflr 12
7592 * mtlr 0
7593 * sub 11,11,12 # r11 = index * 4
7594 * addis 12,12,(got+4-1b)@ha
7595 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7596 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7597 * mtctr 0
7598 * add 0,11,11
7599 * add 11,0,11 # r11 = index * 12 = reloc offset.
7600 * bctr
7601 */
7602 static const unsigned int pic_plt_resolve[] =
7603 {
7604 ADDIS_11_11,
7605 MFLR_0,
7606 BCL_20_31,
7607 ADDI_11_11,
7608 MFLR_12,
7609 MTLR_0,
7610 SUB_11_11_12,
7611 ADDIS_12_12,
7612 LWZ_0_12,
7613 LWZ_12_12,
7614 MTCTR_0,
7615 ADD_0_11_11,
7616 ADD_11_0_11,
7617 BCTR,
7618 NOP,
7619 NOP
7620 };
7621
7622 /*
7623 * Non-PIC glink code is a little simpler.
7624 *
7625 * # ith PLT code stub.
7626 * lis 11,(plt+(i-1)*4)@ha
7627 * lwz 11,(plt+(i-1)*4)@l(11)
7628 * mtctr 11
7629 * bctr
7630 *
7631 * The branch table is the same, then comes
7632 *
7633 * PLTresolve:
7634 * lis 12,(got+4)@ha
7635 * addis 11,11,(-res_0)@ha
7636 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
7637 * addi 11,11,(-res_0)@l # r11 = index * 4
7638 * mtctr 0
7639 * add 0,11,11
7640 * lwz 12,(got+8)@l(12) # got[2] contains the map address
7641 * add 11,0,11 # r11 = index * 12 = reloc offset.
7642 * bctr
7643 */
7644 static const unsigned int plt_resolve[] =
7645 {
7646 LIS_12,
7647 ADDIS_11_11,
7648 LWZ_0_12,
7649 ADDI_11_11,
7650 MTCTR_0,
7651 ADD_0_11_11,
7652 LWZ_12_12,
7653 ADD_11_0_11,
7654 BCTR,
7655 NOP,
7656 NOP,
7657 NOP,
7658 NOP,
7659 NOP,
7660 NOP,
7661 NOP
7662 };
7663
7664 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7665 abort ();
7666 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7667 abort ();
7668
7669 /* Build the branch table, one for each plt entry (less one),
7670 and perhaps some padding. */
7671 p = htab->glink->contents;
7672 p += htab->glink_pltresolve;
7673 endp = htab->glink->contents;
7674 endp += htab->glink->size - GLINK_PLTRESOLVE;
7675 while (p < endp - 8 * 4)
7676 {
7677 bfd_put_32 (output_bfd, B + endp - p, p);
7678 p += 4;
7679 }
7680 while (p < endp)
7681 {
7682 bfd_put_32 (output_bfd, NOP, p);
7683 p += 4;
7684 }
7685
7686 res0 = (htab->glink_pltresolve
7687 + htab->glink->output_section->vma
7688 + htab->glink->output_offset);
7689
7690 /* Last comes the PLTresolve stub. */
7691 if (info->shared || info->pie)
7692 {
7693 bfd_vma bcl;
7694
7695 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7696 {
7697 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7698 p += 4;
7699 }
7700 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7701
7702 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7703 + htab->glink->output_section->vma
7704 + htab->glink->output_offset);
7705
7706 bfd_put_32 (output_bfd,
7707 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7708 bfd_put_32 (output_bfd,
7709 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7710 bfd_put_32 (output_bfd,
7711 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7712 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7713 {
7714 bfd_put_32 (output_bfd,
7715 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7716 bfd_put_32 (output_bfd,
7717 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7718 }
7719 else
7720 {
7721 bfd_put_32 (output_bfd,
7722 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7723 bfd_put_32 (output_bfd,
7724 LWZ_12_12 + 4, p + 9*4);
7725 }
7726 }
7727 else
7728 {
7729 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7730 {
7731 bfd_put_32 (output_bfd, plt_resolve[i], p);
7732 p += 4;
7733 }
7734 p -= 4 * ARRAY_SIZE (plt_resolve);
7735
7736 bfd_put_32 (output_bfd,
7737 LIS_12 + PPC_HA (got + 4), p + 0*4);
7738 bfd_put_32 (output_bfd,
7739 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7740 bfd_put_32 (output_bfd,
7741 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7742 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7743 {
7744 bfd_put_32 (output_bfd,
7745 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7746 bfd_put_32 (output_bfd,
7747 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7748 }
7749 else
7750 {
7751 bfd_put_32 (output_bfd,
7752 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7753 bfd_put_32 (output_bfd,
7754 LWZ_12_12 + 4, p + 6*4);
7755 }
7756 }
7757 }
7758
7759 return TRUE;
7760 }
7761 \f
7762 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7763 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7764 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7765 #define TARGET_BIG_NAME "elf32-powerpc"
7766 #define ELF_ARCH bfd_arch_powerpc
7767 #define ELF_MACHINE_CODE EM_PPC
7768 #ifdef __QNXTARGET__
7769 #define ELF_MAXPAGESIZE 0x1000
7770 #else
7771 #define ELF_MAXPAGESIZE 0x10000
7772 #endif
7773 #define ELF_MINPAGESIZE 0x1000
7774 #define ELF_COMMONPAGESIZE 0x1000
7775 #define elf_info_to_howto ppc_elf_info_to_howto
7776
7777 #ifdef EM_CYGNUS_POWERPC
7778 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7779 #endif
7780
7781 #ifdef EM_PPC_OLD
7782 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7783 #endif
7784
7785 #define elf_backend_plt_not_loaded 1
7786 #define elf_backend_can_gc_sections 1
7787 #define elf_backend_can_refcount 1
7788 #define elf_backend_rela_normal 1
7789
7790 #define bfd_elf32_mkobject ppc_elf_mkobject
7791 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7792 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7793 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7794 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7795 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7796 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7797
7798 #define elf_backend_object_p ppc_elf_object_p
7799 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7800 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7801 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7802 #define elf_backend_relocate_section ppc_elf_relocate_section
7803 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7804 #define elf_backend_check_relocs ppc_elf_check_relocs
7805 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7806 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7807 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7808 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7809 #define elf_backend_hash_symbol ppc_elf_hash_symbol
7810 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7811 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7812 #define elf_backend_fake_sections ppc_elf_fake_sections
7813 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7814 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7815 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7816 #define elf_backend_write_core_note ppc_elf_write_core_note
7817 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7818 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7819 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7820 #define elf_backend_write_section ppc_elf_write_section
7821 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7822 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7823 #define elf_backend_action_discarded ppc_elf_action_discarded
7824 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7825
7826 #include "elf32-target.h"
7827
7828 /* VxWorks Target */
7829
7830 #undef TARGET_LITTLE_SYM
7831 #undef TARGET_LITTLE_NAME
7832
7833 #undef TARGET_BIG_SYM
7834 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7835 #undef TARGET_BIG_NAME
7836 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7837
7838 /* VxWorks uses the elf default section flags for .plt. */
7839 static const struct bfd_elf_special_section *
7840 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7841 {
7842 if (sec->name == NULL)
7843 return NULL;
7844
7845 if (strcmp (sec->name, ".plt") == 0)
7846 return _bfd_elf_get_sec_type_attr (abfd, sec);
7847
7848 return ppc_elf_get_sec_type_attr (abfd, sec);
7849 }
7850
7851 /* Like ppc_elf_link_hash_table_create, but overrides
7852 appropriately for VxWorks. */
7853 static struct bfd_link_hash_table *
7854 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7855 {
7856 struct bfd_link_hash_table *ret;
7857
7858 ret = ppc_elf_link_hash_table_create (abfd);
7859 if (ret)
7860 {
7861 struct ppc_elf_link_hash_table *htab
7862 = (struct ppc_elf_link_hash_table *)ret;
7863 htab->is_vxworks = 1;
7864 htab->plt_type = PLT_VXWORKS;
7865 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7866 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7867 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7868 }
7869 return ret;
7870 }
7871
7872 /* Tweak magic VxWorks symbols as they are loaded. */
7873 static bfd_boolean
7874 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7875 struct bfd_link_info *info,
7876 Elf_Internal_Sym *sym,
7877 const char **namep ATTRIBUTE_UNUSED,
7878 flagword *flagsp ATTRIBUTE_UNUSED,
7879 asection **secp,
7880 bfd_vma *valp)
7881 {
7882 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7883 valp))
7884 return FALSE;
7885
7886 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7887 }
7888
7889 static void
7890 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7891 {
7892 ppc_elf_final_write_processing(abfd, linker);
7893 elf_vxworks_final_write_processing(abfd, linker);
7894 }
7895
7896 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7897 define it. */
7898 #undef elf_backend_want_plt_sym
7899 #define elf_backend_want_plt_sym 1
7900 #undef elf_backend_want_got_plt
7901 #define elf_backend_want_got_plt 1
7902 #undef elf_backend_got_symbol_offset
7903 #define elf_backend_got_symbol_offset 0
7904 #undef elf_backend_plt_not_loaded
7905 #define elf_backend_plt_not_loaded 0
7906 #undef elf_backend_plt_readonly
7907 #define elf_backend_plt_readonly 1
7908 #undef elf_backend_got_header_size
7909 #define elf_backend_got_header_size 12
7910
7911 #undef bfd_elf32_bfd_link_hash_table_create
7912 #define bfd_elf32_bfd_link_hash_table_create \
7913 ppc_elf_vxworks_link_hash_table_create
7914 #undef elf_backend_add_symbol_hook
7915 #define elf_backend_add_symbol_hook \
7916 ppc_elf_vxworks_add_symbol_hook
7917 #undef elf_backend_link_output_symbol_hook
7918 #define elf_backend_link_output_symbol_hook \
7919 elf_vxworks_link_output_symbol_hook
7920 #undef elf_backend_final_write_processing
7921 #define elf_backend_final_write_processing \
7922 ppc_elf_vxworks_final_write_processing
7923 #undef elf_backend_get_sec_type_attr
7924 #define elf_backend_get_sec_type_attr \
7925 ppc_elf_vxworks_get_sec_type_attr
7926 #undef elf_backend_emit_relocs
7927 #define elf_backend_emit_relocs \
7928 elf_vxworks_emit_relocs
7929
7930 #undef elf32_bed
7931 #define elf32_bed ppc_elf_vxworks_bed
7932
7933 #include "elf32-target.h"
GDB Binutils - Deliverables
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