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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, 2009 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
161 /* The value of a defined global symbol. */
162 #define SYM_VAL(SYM) \
163 ((SYM)->root.u.def.section->output_section->vma \
164 + (SYM)->root.u.def.section->output_offset \
165 + (SYM)->root.u.def.value)
166 \f
167 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
168
169 static reloc_howto_type ppc_elf_howto_raw[] = {
170 /* This reloc does nothing. */
171 HOWTO (R_PPC_NONE, /* type */
172 0, /* rightshift */
173 2, /* size (0 = byte, 1 = short, 2 = long) */
174 32, /* bitsize */
175 FALSE, /* pc_relative */
176 0, /* bitpos */
177 complain_overflow_bitfield, /* complain_on_overflow */
178 bfd_elf_generic_reloc, /* special_function */
179 "R_PPC_NONE", /* name */
180 FALSE, /* partial_inplace */
181 0, /* src_mask */
182 0, /* dst_mask */
183 FALSE), /* pcrel_offset */
184
185 /* A standard 32 bit relocation. */
186 HOWTO (R_PPC_ADDR32, /* type */
187 0, /* rightshift */
188 2, /* size (0 = byte, 1 = short, 2 = long) */
189 32, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_bitfield, /* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_PPC_ADDR32", /* name */
195 FALSE, /* partial_inplace */
196 0, /* src_mask */
197 0xffffffff, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 /* An absolute 26 bit branch; the lower two bits must be zero.
201 FIXME: we don't check that, we just clear them. */
202 HOWTO (R_PPC_ADDR24, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 26, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_bitfield, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC_ADDR24", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0x3fffffc, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* A standard 16 bit relocation. */
217 HOWTO (R_PPC_ADDR16, /* type */
218 0, /* rightshift */
219 1, /* size (0 = byte, 1 = short, 2 = long) */
220 16, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_bitfield, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC_ADDR16", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0xffff, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A 16 bit relocation without overflow. */
232 HOWTO (R_PPC_ADDR16_LO, /* type */
233 0, /* rightshift */
234 1, /* size (0 = byte, 1 = short, 2 = long) */
235 16, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_dont,/* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC_ADDR16_LO", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* The high order 16 bits of an address. */
247 HOWTO (R_PPC_ADDR16_HI, /* type */
248 16, /* rightshift */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
250 16, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_PPC_ADDR16_HI", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* The high order 16 bits of an address, plus 1 if the contents of
262 the low 16 bits, treated as a signed number, is negative. */
263 HOWTO (R_PPC_ADDR16_HA, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 ppc_elf_addr16_ha_reloc, /* special_function */
271 "R_PPC_ADDR16_HA", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* An absolute 16 bit branch; the lower two bits must be zero.
278 FIXME: we don't check that, we just clear them. */
279 HOWTO (R_PPC_ADDR14, /* type */
280 0, /* rightshift */
281 2, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_bitfield, /* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_PPC_ADDR14", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xfffc, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch, for which bit 10 should be set to
294 indicate that the branch is expected to be taken. The lower two
295 bits must be zero. */
296 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_bitfield, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14_BRTAKEN",/* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is not expected to be taken. The lower
312 two bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRNTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* A relative 26 bit branch; the lower two bits must be zero. */
328 HOWTO (R_PPC_REL24, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 26, /* bitsize */
332 TRUE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_signed, /* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 "R_PPC_REL24", /* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x3fffffc, /* dst_mask */
340 TRUE), /* pcrel_offset */
341
342 /* A relative 16 bit branch; the lower two bits must be zero. */
343 HOWTO (R_PPC_REL14, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 16, /* bitsize */
347 TRUE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_signed, /* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_PPC_REL14", /* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0xfffc, /* dst_mask */
355 TRUE), /* pcrel_offset */
356
357 /* A relative 16 bit branch. Bit 10 should be set to indicate that
358 the branch is expected to be taken. The lower two bits must be
359 zero. */
360 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14_BRTAKEN", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is not expected to be taken. The lower two bits must
376 be zero. */
377 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRNTAKEN",/* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
392 symbol. */
393 HOWTO (R_PPC_GOT16, /* type */
394 0, /* rightshift */
395 1, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 FALSE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_PPC_GOT16", /* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0xffff, /* dst_mask */
405 FALSE), /* pcrel_offset */
406
407 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
408 the symbol. */
409 HOWTO (R_PPC_GOT16_LO, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_dont, /* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_PPC_GOT16_LO", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC_GOT16_HI, /* type */
426 16, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_bitfield, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 "R_PPC_GOT16_HI", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC_GOT16_HA, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_bitfield, /* complain_on_overflow */
448 ppc_elf_addr16_ha_reloc, /* special_function */
449 "R_PPC_GOT16_HA", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC_REL24, but referring to the procedure linkage table
456 entry for the symbol. */
457 HOWTO (R_PPC_PLTREL24, /* type */
458 0, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 26, /* bitsize */
461 TRUE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_signed, /* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_PPC_PLTREL24", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0x3fffffc, /* dst_mask */
469 TRUE), /* pcrel_offset */
470
471 /* This is used only by the dynamic linker. The symbol should exist
472 both in the object being run and in some shared library. The
473 dynamic linker copies the data addressed by the symbol from the
474 shared library into the object, because the object being
475 run has to have the data at some particular address. */
476 HOWTO (R_PPC_COPY, /* type */
477 0, /* rightshift */
478 2, /* size (0 = byte, 1 = short, 2 = long) */
479 32, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_bitfield, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_COPY", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC_ADDR32, but used when setting global offset table
491 entries. */
492 HOWTO (R_PPC_GLOB_DAT, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_bitfield, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_PPC_GLOB_DAT", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffffffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Marks a procedure linkage table entry for a symbol. */
507 HOWTO (R_PPC_JMP_SLOT, /* type */
508 0, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 32, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_bitfield, /* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_PPC_JMP_SLOT", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Used only by the dynamic linker. When the object is run, this
522 longword is set to the load address of the object, plus the
523 addend. */
524 HOWTO (R_PPC_RELATIVE, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_bitfield, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_RELATIVE", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0xffffffff, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Like R_PPC_REL24, but uses the value of the symbol within the
539 object rather than the final value. Normally used for
540 _GLOBAL_OFFSET_TABLE_. */
541 HOWTO (R_PPC_LOCAL24PC, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 26, /* bitsize */
545 TRUE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_signed, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_LOCAL24PC", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0x3fffffc, /* dst_mask */
553 TRUE), /* pcrel_offset */
554
555 /* Like R_PPC_ADDR32, but may be unaligned. */
556 HOWTO (R_PPC_UADDR32, /* type */
557 0, /* rightshift */
558 2, /* size (0 = byte, 1 = short, 2 = long) */
559 32, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_bitfield, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC_UADDR32", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 0xffffffff, /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* Like R_PPC_ADDR16, but may be unaligned. */
571 HOWTO (R_PPC_UADDR16, /* type */
572 0, /* rightshift */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
574 16, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC_UADDR16", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* 32-bit PC relative */
586 HOWTO (R_PPC_REL32, /* type */
587 0, /* rightshift */
588 2, /* size (0 = byte, 1 = short, 2 = long) */
589 32, /* bitsize */
590 TRUE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC_REL32", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffffffff, /* dst_mask */
598 TRUE), /* pcrel_offset */
599
600 /* 32-bit relocation to the symbol's procedure linkage table.
601 FIXME: not supported. */
602 HOWTO (R_PPC_PLT32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 FALSE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_bitfield, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_PLT32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0, /* dst_mask */
614 FALSE), /* pcrel_offset */
615
616 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
617 FIXME: not supported. */
618 HOWTO (R_PPC_PLTREL32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 TRUE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 bfd_elf_generic_reloc, /* special_function */
626 "R_PPC_PLTREL32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 TRUE), /* pcrel_offset */
631
632 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
633 the symbol. */
634 HOWTO (R_PPC_PLT16_LO, /* type */
635 0, /* rightshift */
636 1, /* size (0 = byte, 1 = short, 2 = long) */
637 16, /* bitsize */
638 FALSE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC_PLT16_LO", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffff, /* dst_mask */
646 FALSE), /* pcrel_offset */
647
648 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC_PLT16_HI, /* type */
651 16, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_bitfield, /* complain_on_overflow */
657 bfd_elf_generic_reloc, /* special_function */
658 "R_PPC_PLT16_HI", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC_PLT16_HA, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_bitfield, /* complain_on_overflow */
673 ppc_elf_addr16_ha_reloc, /* special_function */
674 "R_PPC_PLT16_HA", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
681 small data items. */
682 HOWTO (R_PPC_SDAREL16, /* type */
683 0, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_signed, /* complain_on_overflow */
689 bfd_elf_generic_reloc, /* special_function */
690 "R_PPC_SDAREL16", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 bfd_elf_generic_reloc, /* special_function */
705 "R_PPC_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* 16-bit lower half section relative relocation. */
712 HOWTO (R_PPC_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 bfd_elf_generic_reloc, /* special_function */
720 "R_PPC_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_bitfield, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_PPC_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_bitfield, /* complain_on_overflow */
749 ppc_elf_addr16_ha_reloc, /* special_function */
750 "R_PPC_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Marker relocs for TLS. */
757 HOWTO (R_PPC_TLS,
758 0, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 32, /* bitsize */
761 FALSE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC_TLS", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0, /* dst_mask */
769 FALSE), /* pcrel_offset */
770
771 HOWTO (R_PPC_TLSGD,
772 0, /* rightshift */
773 2, /* size (0 = byte, 1 = short, 2 = long) */
774 32, /* bitsize */
775 FALSE, /* pc_relative */
776 0, /* bitpos */
777 complain_overflow_dont, /* complain_on_overflow */
778 bfd_elf_generic_reloc, /* special_function */
779 "R_PPC_TLSGD", /* name */
780 FALSE, /* partial_inplace */
781 0, /* src_mask */
782 0, /* dst_mask */
783 FALSE), /* pcrel_offset */
784
785 HOWTO (R_PPC_TLSLD,
786 0, /* rightshift */
787 2, /* size (0 = byte, 1 = short, 2 = long) */
788 32, /* bitsize */
789 FALSE, /* pc_relative */
790 0, /* bitpos */
791 complain_overflow_dont, /* complain_on_overflow */
792 bfd_elf_generic_reloc, /* special_function */
793 "R_PPC_TLSLD", /* name */
794 FALSE, /* partial_inplace */
795 0, /* src_mask */
796 0, /* dst_mask */
797 FALSE), /* pcrel_offset */
798
799 /* Computes the load module index of the load module that contains the
800 definition of its TLS sym. */
801 HOWTO (R_PPC_DTPMOD32,
802 0, /* rightshift */
803 2, /* size (0 = byte, 1 = short, 2 = long) */
804 32, /* bitsize */
805 FALSE, /* pc_relative */
806 0, /* bitpos */
807 complain_overflow_dont, /* complain_on_overflow */
808 ppc_elf_unhandled_reloc, /* special_function */
809 "R_PPC_DTPMOD32", /* name */
810 FALSE, /* partial_inplace */
811 0, /* src_mask */
812 0xffffffff, /* dst_mask */
813 FALSE), /* pcrel_offset */
814
815 /* Computes a dtv-relative displacement, the difference between the value
816 of sym+add and the base address of the thread-local storage block that
817 contains the definition of sym, minus 0x8000. */
818 HOWTO (R_PPC_DTPREL32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPREL32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* A 16 bit dtprel reloc. */
833 HOWTO (R_PPC_DTPREL16,
834 0, /* rightshift */
835 1, /* size (0 = byte, 1 = short, 2 = long) */
836 16, /* bitsize */
837 FALSE, /* pc_relative */
838 0, /* bitpos */
839 complain_overflow_signed, /* complain_on_overflow */
840 ppc_elf_unhandled_reloc, /* special_function */
841 "R_PPC_DTPREL16", /* name */
842 FALSE, /* partial_inplace */
843 0, /* src_mask */
844 0xffff, /* dst_mask */
845 FALSE), /* pcrel_offset */
846
847 /* Like DTPREL16, but no overflow. */
848 HOWTO (R_PPC_DTPREL16_LO,
849 0, /* rightshift */
850 1, /* size (0 = byte, 1 = short, 2 = long) */
851 16, /* bitsize */
852 FALSE, /* pc_relative */
853 0, /* bitpos */
854 complain_overflow_dont, /* complain_on_overflow */
855 ppc_elf_unhandled_reloc, /* special_function */
856 "R_PPC_DTPREL16_LO", /* name */
857 FALSE, /* partial_inplace */
858 0, /* src_mask */
859 0xffff, /* dst_mask */
860 FALSE), /* pcrel_offset */
861
862 /* Like DTPREL16_LO, but next higher group of 16 bits. */
863 HOWTO (R_PPC_DTPREL16_HI,
864 16, /* rightshift */
865 1, /* size (0 = byte, 1 = short, 2 = long) */
866 16, /* bitsize */
867 FALSE, /* pc_relative */
868 0, /* bitpos */
869 complain_overflow_dont, /* complain_on_overflow */
870 ppc_elf_unhandled_reloc, /* special_function */
871 "R_PPC_DTPREL16_HI", /* name */
872 FALSE, /* partial_inplace */
873 0, /* src_mask */
874 0xffff, /* dst_mask */
875 FALSE), /* pcrel_offset */
876
877 /* Like DTPREL16_HI, but adjust for low 16 bits. */
878 HOWTO (R_PPC_DTPREL16_HA,
879 16, /* rightshift */
880 1, /* size (0 = byte, 1 = short, 2 = long) */
881 16, /* bitsize */
882 FALSE, /* pc_relative */
883 0, /* bitpos */
884 complain_overflow_dont, /* complain_on_overflow */
885 ppc_elf_unhandled_reloc, /* special_function */
886 "R_PPC_DTPREL16_HA", /* name */
887 FALSE, /* partial_inplace */
888 0, /* src_mask */
889 0xffff, /* dst_mask */
890 FALSE), /* pcrel_offset */
891
892 /* Computes a tp-relative displacement, the difference between the value of
893 sym+add and the value of the thread pointer (r13). */
894 HOWTO (R_PPC_TPREL32,
895 0, /* rightshift */
896 2, /* size (0 = byte, 1 = short, 2 = long) */
897 32, /* bitsize */
898 FALSE, /* pc_relative */
899 0, /* bitpos */
900 complain_overflow_dont, /* complain_on_overflow */
901 ppc_elf_unhandled_reloc, /* special_function */
902 "R_PPC_TPREL32", /* name */
903 FALSE, /* partial_inplace */
904 0, /* src_mask */
905 0xffffffff, /* dst_mask */
906 FALSE), /* pcrel_offset */
907
908 /* A 16 bit tprel reloc. */
909 HOWTO (R_PPC_TPREL16,
910 0, /* rightshift */
911 1, /* size (0 = byte, 1 = short, 2 = long) */
912 16, /* bitsize */
913 FALSE, /* pc_relative */
914 0, /* bitpos */
915 complain_overflow_signed, /* complain_on_overflow */
916 ppc_elf_unhandled_reloc, /* special_function */
917 "R_PPC_TPREL16", /* name */
918 FALSE, /* partial_inplace */
919 0, /* src_mask */
920 0xffff, /* dst_mask */
921 FALSE), /* pcrel_offset */
922
923 /* Like TPREL16, but no overflow. */
924 HOWTO (R_PPC_TPREL16_LO,
925 0, /* rightshift */
926 1, /* size (0 = byte, 1 = short, 2 = long) */
927 16, /* bitsize */
928 FALSE, /* pc_relative */
929 0, /* bitpos */
930 complain_overflow_dont, /* complain_on_overflow */
931 ppc_elf_unhandled_reloc, /* special_function */
932 "R_PPC_TPREL16_LO", /* name */
933 FALSE, /* partial_inplace */
934 0, /* src_mask */
935 0xffff, /* dst_mask */
936 FALSE), /* pcrel_offset */
937
938 /* Like TPREL16_LO, but next higher group of 16 bits. */
939 HOWTO (R_PPC_TPREL16_HI,
940 16, /* rightshift */
941 1, /* size (0 = byte, 1 = short, 2 = long) */
942 16, /* bitsize */
943 FALSE, /* pc_relative */
944 0, /* bitpos */
945 complain_overflow_dont, /* complain_on_overflow */
946 ppc_elf_unhandled_reloc, /* special_function */
947 "R_PPC_TPREL16_HI", /* name */
948 FALSE, /* partial_inplace */
949 0, /* src_mask */
950 0xffff, /* dst_mask */
951 FALSE), /* pcrel_offset */
952
953 /* Like TPREL16_HI, but adjust for low 16 bits. */
954 HOWTO (R_PPC_TPREL16_HA,
955 16, /* rightshift */
956 1, /* size (0 = byte, 1 = short, 2 = long) */
957 16, /* bitsize */
958 FALSE, /* pc_relative */
959 0, /* bitpos */
960 complain_overflow_dont, /* complain_on_overflow */
961 ppc_elf_unhandled_reloc, /* special_function */
962 "R_PPC_TPREL16_HA", /* name */
963 FALSE, /* partial_inplace */
964 0, /* src_mask */
965 0xffff, /* dst_mask */
966 FALSE), /* pcrel_offset */
967
968 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
969 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
970 to the first entry. */
971 HOWTO (R_PPC_GOT_TLSGD16,
972 0, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_signed, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_GOT_TLSGD16", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Like GOT_TLSGD16, but no overflow. */
986 HOWTO (R_PPC_GOT_TLSGD16_LO,
987 0, /* rightshift */
988 1, /* size (0 = byte, 1 = short, 2 = long) */
989 16, /* bitsize */
990 FALSE, /* pc_relative */
991 0, /* bitpos */
992 complain_overflow_dont, /* complain_on_overflow */
993 ppc_elf_unhandled_reloc, /* special_function */
994 "R_PPC_GOT_TLSGD16_LO", /* name */
995 FALSE, /* partial_inplace */
996 0, /* src_mask */
997 0xffff, /* dst_mask */
998 FALSE), /* pcrel_offset */
999
1000 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1001 HOWTO (R_PPC_GOT_TLSGD16_HI,
1002 16, /* rightshift */
1003 1, /* size (0 = byte, 1 = short, 2 = long) */
1004 16, /* bitsize */
1005 FALSE, /* pc_relative */
1006 0, /* bitpos */
1007 complain_overflow_dont, /* complain_on_overflow */
1008 ppc_elf_unhandled_reloc, /* special_function */
1009 "R_PPC_GOT_TLSGD16_HI", /* name */
1010 FALSE, /* partial_inplace */
1011 0, /* src_mask */
1012 0xffff, /* dst_mask */
1013 FALSE), /* pcrel_offset */
1014
1015 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1016 HOWTO (R_PPC_GOT_TLSGD16_HA,
1017 16, /* rightshift */
1018 1, /* size (0 = byte, 1 = short, 2 = long) */
1019 16, /* bitsize */
1020 FALSE, /* pc_relative */
1021 0, /* bitpos */
1022 complain_overflow_dont, /* complain_on_overflow */
1023 ppc_elf_unhandled_reloc, /* special_function */
1024 "R_PPC_GOT_TLSGD16_HA", /* name */
1025 FALSE, /* partial_inplace */
1026 0, /* src_mask */
1027 0xffff, /* dst_mask */
1028 FALSE), /* pcrel_offset */
1029
1030 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1031 with values (sym+add)@dtpmod and zero, and computes the offset to the
1032 first entry. */
1033 HOWTO (R_PPC_GOT_TLSLD16,
1034 0, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_signed, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSLD16", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Like GOT_TLSLD16, but no overflow. */
1048 HOWTO (R_PPC_GOT_TLSLD16_LO,
1049 0, /* rightshift */
1050 1, /* size (0 = byte, 1 = short, 2 = long) */
1051 16, /* bitsize */
1052 FALSE, /* pc_relative */
1053 0, /* bitpos */
1054 complain_overflow_dont, /* complain_on_overflow */
1055 ppc_elf_unhandled_reloc, /* special_function */
1056 "R_PPC_GOT_TLSLD16_LO", /* name */
1057 FALSE, /* partial_inplace */
1058 0, /* src_mask */
1059 0xffff, /* dst_mask */
1060 FALSE), /* pcrel_offset */
1061
1062 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1063 HOWTO (R_PPC_GOT_TLSLD16_HI,
1064 16, /* rightshift */
1065 1, /* size (0 = byte, 1 = short, 2 = long) */
1066 16, /* bitsize */
1067 FALSE, /* pc_relative */
1068 0, /* bitpos */
1069 complain_overflow_dont, /* complain_on_overflow */
1070 ppc_elf_unhandled_reloc, /* special_function */
1071 "R_PPC_GOT_TLSLD16_HI", /* name */
1072 FALSE, /* partial_inplace */
1073 0, /* src_mask */
1074 0xffff, /* dst_mask */
1075 FALSE), /* pcrel_offset */
1076
1077 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1078 HOWTO (R_PPC_GOT_TLSLD16_HA,
1079 16, /* rightshift */
1080 1, /* size (0 = byte, 1 = short, 2 = long) */
1081 16, /* bitsize */
1082 FALSE, /* pc_relative */
1083 0, /* bitpos */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 ppc_elf_unhandled_reloc, /* special_function */
1086 "R_PPC_GOT_TLSLD16_HA", /* name */
1087 FALSE, /* partial_inplace */
1088 0, /* src_mask */
1089 0xffff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1091
1092 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1093 the offset to the entry. */
1094 HOWTO (R_PPC_GOT_DTPREL16,
1095 0, /* rightshift */
1096 1, /* size (0 = byte, 1 = short, 2 = long) */
1097 16, /* bitsize */
1098 FALSE, /* pc_relative */
1099 0, /* bitpos */
1100 complain_overflow_signed, /* complain_on_overflow */
1101 ppc_elf_unhandled_reloc, /* special_function */
1102 "R_PPC_GOT_DTPREL16", /* name */
1103 FALSE, /* partial_inplace */
1104 0, /* src_mask */
1105 0xffff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1107
1108 /* Like GOT_DTPREL16, but no overflow. */
1109 HOWTO (R_PPC_GOT_DTPREL16_LO,
1110 0, /* rightshift */
1111 1, /* size (0 = byte, 1 = short, 2 = long) */
1112 16, /* bitsize */
1113 FALSE, /* pc_relative */
1114 0, /* bitpos */
1115 complain_overflow_dont, /* complain_on_overflow */
1116 ppc_elf_unhandled_reloc, /* special_function */
1117 "R_PPC_GOT_DTPREL16_LO", /* name */
1118 FALSE, /* partial_inplace */
1119 0, /* src_mask */
1120 0xffff, /* dst_mask */
1121 FALSE), /* pcrel_offset */
1122
1123 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1124 HOWTO (R_PPC_GOT_DTPREL16_HI,
1125 16, /* rightshift */
1126 1, /* size (0 = byte, 1 = short, 2 = long) */
1127 16, /* bitsize */
1128 FALSE, /* pc_relative */
1129 0, /* bitpos */
1130 complain_overflow_dont, /* complain_on_overflow */
1131 ppc_elf_unhandled_reloc, /* special_function */
1132 "R_PPC_GOT_DTPREL16_HI", /* name */
1133 FALSE, /* partial_inplace */
1134 0, /* src_mask */
1135 0xffff, /* dst_mask */
1136 FALSE), /* pcrel_offset */
1137
1138 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1139 HOWTO (R_PPC_GOT_DTPREL16_HA,
1140 16, /* rightshift */
1141 1, /* size (0 = byte, 1 = short, 2 = long) */
1142 16, /* bitsize */
1143 FALSE, /* pc_relative */
1144 0, /* bitpos */
1145 complain_overflow_dont, /* complain_on_overflow */
1146 ppc_elf_unhandled_reloc, /* special_function */
1147 "R_PPC_GOT_DTPREL16_HA", /* name */
1148 FALSE, /* partial_inplace */
1149 0, /* src_mask */
1150 0xffff, /* dst_mask */
1151 FALSE), /* pcrel_offset */
1152
1153 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1154 offset to the entry. */
1155 HOWTO (R_PPC_GOT_TPREL16,
1156 0, /* rightshift */
1157 1, /* size (0 = byte, 1 = short, 2 = long) */
1158 16, /* bitsize */
1159 FALSE, /* pc_relative */
1160 0, /* bitpos */
1161 complain_overflow_signed, /* complain_on_overflow */
1162 ppc_elf_unhandled_reloc, /* special_function */
1163 "R_PPC_GOT_TPREL16", /* name */
1164 FALSE, /* partial_inplace */
1165 0, /* src_mask */
1166 0xffff, /* dst_mask */
1167 FALSE), /* pcrel_offset */
1168
1169 /* Like GOT_TPREL16, but no overflow. */
1170 HOWTO (R_PPC_GOT_TPREL16_LO,
1171 0, /* rightshift */
1172 1, /* size (0 = byte, 1 = short, 2 = long) */
1173 16, /* bitsize */
1174 FALSE, /* pc_relative */
1175 0, /* bitpos */
1176 complain_overflow_dont, /* complain_on_overflow */
1177 ppc_elf_unhandled_reloc, /* special_function */
1178 "R_PPC_GOT_TPREL16_LO", /* name */
1179 FALSE, /* partial_inplace */
1180 0, /* src_mask */
1181 0xffff, /* dst_mask */
1182 FALSE), /* pcrel_offset */
1183
1184 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1185 HOWTO (R_PPC_GOT_TPREL16_HI,
1186 16, /* rightshift */
1187 1, /* size (0 = byte, 1 = short, 2 = long) */
1188 16, /* bitsize */
1189 FALSE, /* pc_relative */
1190 0, /* bitpos */
1191 complain_overflow_dont, /* complain_on_overflow */
1192 ppc_elf_unhandled_reloc, /* special_function */
1193 "R_PPC_GOT_TPREL16_HI", /* name */
1194 FALSE, /* partial_inplace */
1195 0, /* src_mask */
1196 0xffff, /* dst_mask */
1197 FALSE), /* pcrel_offset */
1198
1199 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1200 HOWTO (R_PPC_GOT_TPREL16_HA,
1201 16, /* rightshift */
1202 1, /* size (0 = byte, 1 = short, 2 = long) */
1203 16, /* bitsize */
1204 FALSE, /* pc_relative */
1205 0, /* bitpos */
1206 complain_overflow_dont, /* complain_on_overflow */
1207 ppc_elf_unhandled_reloc, /* special_function */
1208 "R_PPC_GOT_TPREL16_HA", /* name */
1209 FALSE, /* partial_inplace */
1210 0, /* src_mask */
1211 0xffff, /* dst_mask */
1212 FALSE), /* pcrel_offset */
1213
1214 /* The remaining relocs are from the Embedded ELF ABI, and are not
1215 in the SVR4 ELF ABI. */
1216
1217 /* 32 bit value resulting from the addend minus the symbol. */
1218 HOWTO (R_PPC_EMB_NADDR32, /* type */
1219 0, /* rightshift */
1220 2, /* size (0 = byte, 1 = short, 2 = long) */
1221 32, /* bitsize */
1222 FALSE, /* pc_relative */
1223 0, /* bitpos */
1224 complain_overflow_bitfield, /* complain_on_overflow */
1225 bfd_elf_generic_reloc, /* special_function */
1226 "R_PPC_EMB_NADDR32", /* name */
1227 FALSE, /* partial_inplace */
1228 0, /* src_mask */
1229 0xffffffff, /* dst_mask */
1230 FALSE), /* pcrel_offset */
1231
1232 /* 16 bit value resulting from the addend minus the symbol. */
1233 HOWTO (R_PPC_EMB_NADDR16, /* type */
1234 0, /* rightshift */
1235 1, /* size (0 = byte, 1 = short, 2 = long) */
1236 16, /* bitsize */
1237 FALSE, /* pc_relative */
1238 0, /* bitpos */
1239 complain_overflow_bitfield, /* complain_on_overflow */
1240 bfd_elf_generic_reloc, /* special_function */
1241 "R_PPC_EMB_NADDR16", /* name */
1242 FALSE, /* partial_inplace */
1243 0, /* src_mask */
1244 0xffff, /* dst_mask */
1245 FALSE), /* pcrel_offset */
1246
1247 /* 16 bit value resulting from the addend minus the symbol. */
1248 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1249 0, /* rightshift */
1250 1, /* size (0 = byte, 1 = short, 2 = long) */
1251 16, /* bitsize */
1252 FALSE, /* pc_relative */
1253 0, /* bitpos */
1254 complain_overflow_dont,/* complain_on_overflow */
1255 bfd_elf_generic_reloc, /* special_function */
1256 "R_PPC_EMB_ADDR16_LO", /* name */
1257 FALSE, /* partial_inplace */
1258 0, /* src_mask */
1259 0xffff, /* dst_mask */
1260 FALSE), /* pcrel_offset */
1261
1262 /* The high order 16 bits of the addend minus the symbol. */
1263 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1264 16, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_dont, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_PPC_EMB_NADDR16_HI", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xffff, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* The high order 16 bits of the result of the addend minus the address,
1278 plus 1 if the contents of the low 16 bits, treated as a signed number,
1279 is negative. */
1280 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_addr16_ha_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HA", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* 16 bit value resulting from allocating a 4 byte word to hold an
1295 address in the .sdata section, and returning the offset from
1296 _SDA_BASE_ for that relocation. */
1297 HOWTO (R_PPC_EMB_SDAI16, /* type */
1298 0, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_bitfield, /* complain_on_overflow */
1304 bfd_elf_generic_reloc, /* special_function */
1305 "R_PPC_EMB_SDAI16", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata2 section, and returning the offset from
1313 _SDA2_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_bitfield, /* complain_on_overflow */
1321 bfd_elf_generic_reloc, /* special_function */
1322 "R_PPC_EMB_SDA2I16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1329 small data items. */
1330 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1331 0, /* rightshift */
1332 1, /* size (0 = byte, 1 = short, 2 = long) */
1333 16, /* bitsize */
1334 FALSE, /* pc_relative */
1335 0, /* bitpos */
1336 complain_overflow_signed, /* complain_on_overflow */
1337 bfd_elf_generic_reloc, /* special_function */
1338 "R_PPC_EMB_SDA2REL", /* name */
1339 FALSE, /* partial_inplace */
1340 0, /* src_mask */
1341 0xffff, /* dst_mask */
1342 FALSE), /* pcrel_offset */
1343
1344 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1345 signed offset from the appropriate base, and filling in the register
1346 field with the appropriate register (0, 2, or 13). */
1347 HOWTO (R_PPC_EMB_SDA21, /* type */
1348 0, /* rightshift */
1349 2, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 bfd_elf_generic_reloc, /* special_function */
1355 "R_PPC_EMB_SDA21", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocation not handled: R_PPC_EMB_MRKREF */
1362 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1363 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1364 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1365 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1366 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1367
1368 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1369 in the 16 bit signed offset from the appropriate base, and filling in the
1370 register field with the appropriate register (0, 2, or 13). */
1371 HOWTO (R_PPC_EMB_RELSDA, /* type */
1372 0, /* rightshift */
1373 1, /* size (0 = byte, 1 = short, 2 = long) */
1374 16, /* bitsize */
1375 TRUE, /* pc_relative */
1376 0, /* bitpos */
1377 complain_overflow_signed, /* complain_on_overflow */
1378 bfd_elf_generic_reloc, /* special_function */
1379 "R_PPC_EMB_RELSDA", /* name */
1380 FALSE, /* partial_inplace */
1381 0, /* src_mask */
1382 0xffff, /* dst_mask */
1383 FALSE), /* pcrel_offset */
1384
1385 /* A 16 bit relative relocation. */
1386 HOWTO (R_PPC_REL16, /* type */
1387 0, /* rightshift */
1388 1, /* size (0 = byte, 1 = short, 2 = long) */
1389 16, /* bitsize */
1390 TRUE, /* pc_relative */
1391 0, /* bitpos */
1392 complain_overflow_bitfield, /* complain_on_overflow */
1393 bfd_elf_generic_reloc, /* special_function */
1394 "R_PPC_REL16", /* name */
1395 FALSE, /* partial_inplace */
1396 0, /* src_mask */
1397 0xffff, /* dst_mask */
1398 TRUE), /* pcrel_offset */
1399
1400 /* A 16 bit relative relocation without overflow. */
1401 HOWTO (R_PPC_REL16_LO, /* type */
1402 0, /* rightshift */
1403 1, /* size (0 = byte, 1 = short, 2 = long) */
1404 16, /* bitsize */
1405 TRUE, /* pc_relative */
1406 0, /* bitpos */
1407 complain_overflow_dont,/* complain_on_overflow */
1408 bfd_elf_generic_reloc, /* special_function */
1409 "R_PPC_REL16_LO", /* name */
1410 FALSE, /* partial_inplace */
1411 0, /* src_mask */
1412 0xffff, /* dst_mask */
1413 TRUE), /* pcrel_offset */
1414
1415 /* The high order 16 bits of a relative address. */
1416 HOWTO (R_PPC_REL16_HI, /* type */
1417 16, /* rightshift */
1418 1, /* size (0 = byte, 1 = short, 2 = long) */
1419 16, /* bitsize */
1420 TRUE, /* pc_relative */
1421 0, /* bitpos */
1422 complain_overflow_dont, /* complain_on_overflow */
1423 bfd_elf_generic_reloc, /* special_function */
1424 "R_PPC_REL16_HI", /* name */
1425 FALSE, /* partial_inplace */
1426 0, /* src_mask */
1427 0xffff, /* dst_mask */
1428 TRUE), /* pcrel_offset */
1429
1430 /* The high order 16 bits of a relative address, plus 1 if the contents of
1431 the low 16 bits, treated as a signed number, is negative. */
1432 HOWTO (R_PPC_REL16_HA, /* type */
1433 16, /* rightshift */
1434 1, /* size (0 = byte, 1 = short, 2 = long) */
1435 16, /* bitsize */
1436 TRUE, /* pc_relative */
1437 0, /* bitpos */
1438 complain_overflow_dont, /* complain_on_overflow */
1439 ppc_elf_addr16_ha_reloc, /* special_function */
1440 "R_PPC_REL16_HA", /* name */
1441 FALSE, /* partial_inplace */
1442 0, /* src_mask */
1443 0xffff, /* dst_mask */
1444 TRUE), /* pcrel_offset */
1445
1446 /* GNU extension to record C++ vtable hierarchy. */
1447 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1448 0, /* rightshift */
1449 0, /* size (0 = byte, 1 = short, 2 = long) */
1450 0, /* bitsize */
1451 FALSE, /* pc_relative */
1452 0, /* bitpos */
1453 complain_overflow_dont, /* complain_on_overflow */
1454 NULL, /* special_function */
1455 "R_PPC_GNU_VTINHERIT", /* name */
1456 FALSE, /* partial_inplace */
1457 0, /* src_mask */
1458 0, /* dst_mask */
1459 FALSE), /* pcrel_offset */
1460
1461 /* GNU extension to record C++ vtable member usage. */
1462 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1463 0, /* rightshift */
1464 0, /* size (0 = byte, 1 = short, 2 = long) */
1465 0, /* bitsize */
1466 FALSE, /* pc_relative */
1467 0, /* bitpos */
1468 complain_overflow_dont, /* complain_on_overflow */
1469 NULL, /* special_function */
1470 "R_PPC_GNU_VTENTRY", /* name */
1471 FALSE, /* partial_inplace */
1472 0, /* src_mask */
1473 0, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1475
1476 /* Phony reloc to handle AIX style TOC entries. */
1477 HOWTO (R_PPC_TOC16, /* type */
1478 0, /* rightshift */
1479 1, /* size (0 = byte, 1 = short, 2 = long) */
1480 16, /* bitsize */
1481 FALSE, /* pc_relative */
1482 0, /* bitpos */
1483 complain_overflow_signed, /* complain_on_overflow */
1484 bfd_elf_generic_reloc, /* special_function */
1485 "R_PPC_TOC16", /* name */
1486 FALSE, /* partial_inplace */
1487 0, /* src_mask */
1488 0xffff, /* dst_mask */
1489 FALSE), /* pcrel_offset */
1490 };
1491 \f
1492 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1493
1494 static void
1495 ppc_elf_howto_init (void)
1496 {
1497 unsigned int i, type;
1498
1499 for (i = 0;
1500 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1501 i++)
1502 {
1503 type = ppc_elf_howto_raw[i].type;
1504 if (type >= (sizeof (ppc_elf_howto_table)
1505 / sizeof (ppc_elf_howto_table[0])))
1506 abort ();
1507 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1508 }
1509 }
1510
1511 static reloc_howto_type *
1512 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1513 bfd_reloc_code_real_type code)
1514 {
1515 enum elf_ppc_reloc_type r;
1516
1517 /* Initialize howto table if not already done. */
1518 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1519 ppc_elf_howto_init ();
1520
1521 switch (code)
1522 {
1523 default:
1524 return NULL;
1525
1526 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1527 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1528 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1529 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1530 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1531 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1532 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1533 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1534 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1535 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1536 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1537 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1538 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1539 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1540 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1541 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1542 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1543 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1544 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1545 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1546 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1547 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1548 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1549 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1550 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1551 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1552 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1553 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1554 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1555 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1556 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1557 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1558 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1559 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1560 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1561 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1562 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1563 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1564 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1565 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1566 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1567 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1568 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1569 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1570 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1571 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1572 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1573 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1574 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1575 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1576 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1577 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1578 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1579 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1580 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1581 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1582 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1583 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1584 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1585 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1586 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1587 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1588 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1589 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1590 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1591 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1592 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1593 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1594 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1595 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1596 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1597 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1598 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1599 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1600 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1601 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1602 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1603 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1604 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1605 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1606 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1607 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1608 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1609 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1610 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1611 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1612 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1613 }
1614
1615 return ppc_elf_howto_table[r];
1616 };
1617
1618 static reloc_howto_type *
1619 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1620 const char *r_name)
1621 {
1622 unsigned int i;
1623
1624 for (i = 0;
1625 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1626 i++)
1627 if (ppc_elf_howto_raw[i].name != NULL
1628 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1629 return &ppc_elf_howto_raw[i];
1630
1631 return NULL;
1632 }
1633
1634 /* Set the howto pointer for a PowerPC ELF reloc. */
1635
1636 static void
1637 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1638 arelent *cache_ptr,
1639 Elf_Internal_Rela *dst)
1640 {
1641 /* Initialize howto table if not already done. */
1642 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1643 ppc_elf_howto_init ();
1644
1645 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1646 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1647
1648 /* Just because the above assert didn't trigger doesn't mean that
1649 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1650 if (!cache_ptr->howto)
1651 {
1652 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1653 abfd, ELF32_R_TYPE (dst->r_info));
1654 bfd_set_error (bfd_error_bad_value);
1655
1656 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1657 }
1658 }
1659
1660 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1661
1662 static bfd_reloc_status_type
1663 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1664 arelent *reloc_entry,
1665 asymbol *symbol,
1666 void *data ATTRIBUTE_UNUSED,
1667 asection *input_section,
1668 bfd *output_bfd,
1669 char **error_message ATTRIBUTE_UNUSED)
1670 {
1671 bfd_vma relocation;
1672
1673 if (output_bfd != NULL)
1674 {
1675 reloc_entry->address += input_section->output_offset;
1676 return bfd_reloc_ok;
1677 }
1678
1679 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1680 return bfd_reloc_outofrange;
1681
1682 if (bfd_is_com_section (symbol->section))
1683 relocation = 0;
1684 else
1685 relocation = symbol->value;
1686
1687 relocation += symbol->section->output_section->vma;
1688 relocation += symbol->section->output_offset;
1689 relocation += reloc_entry->addend;
1690 if (reloc_entry->howto->pc_relative)
1691 relocation -= reloc_entry->address;
1692
1693 reloc_entry->addend += (relocation & 0x8000) << 1;
1694
1695 return bfd_reloc_continue;
1696 }
1697
1698 static bfd_reloc_status_type
1699 ppc_elf_unhandled_reloc (bfd *abfd,
1700 arelent *reloc_entry,
1701 asymbol *symbol,
1702 void *data,
1703 asection *input_section,
1704 bfd *output_bfd,
1705 char **error_message)
1706 {
1707 /* If this is a relocatable link (output_bfd test tells us), just
1708 call the generic function. Any adjustment will be done at final
1709 link time. */
1710 if (output_bfd != NULL)
1711 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1712 input_section, output_bfd, error_message);
1713
1714 if (error_message != NULL)
1715 {
1716 static char buf[60];
1717 sprintf (buf, _("generic linker can't handle %s"),
1718 reloc_entry->howto->name);
1719 *error_message = buf;
1720 }
1721 return bfd_reloc_dangerous;
1722 }
1723 \f
1724 /* Sections created by the linker. */
1725
1726 typedef struct elf_linker_section
1727 {
1728 /* Pointer to the bfd section. */
1729 asection *section;
1730 /* Section name. */
1731 const char *name;
1732 /* Associated bss section name. */
1733 const char *bss_name;
1734 /* Associated symbol name. */
1735 const char *sym_name;
1736 /* Associated symbol. */
1737 struct elf_link_hash_entry *sym;
1738 } elf_linker_section_t;
1739
1740 /* Linked list of allocated pointer entries. This hangs off of the
1741 symbol lists, and provides allows us to return different pointers,
1742 based on different addend's. */
1743
1744 typedef struct elf_linker_section_pointers
1745 {
1746 /* next allocated pointer for this symbol */
1747 struct elf_linker_section_pointers *next;
1748 /* offset of pointer from beginning of section */
1749 bfd_vma offset;
1750 /* addend used */
1751 bfd_vma addend;
1752 /* which linker section this is */
1753 elf_linker_section_t *lsect;
1754 } elf_linker_section_pointers_t;
1755
1756 struct ppc_elf_obj_tdata
1757 {
1758 struct elf_obj_tdata elf;
1759
1760 /* A mapping from local symbols to offsets into the various linker
1761 sections added. This is index by the symbol index. */
1762 elf_linker_section_pointers_t **linker_section_pointers;
1763
1764 /* Flags used to auto-detect plt type. */
1765 unsigned int makes_plt_call : 1;
1766 unsigned int has_rel16 : 1;
1767 };
1768
1769 #define ppc_elf_tdata(bfd) \
1770 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1771
1772 #define elf_local_ptr_offsets(bfd) \
1773 (ppc_elf_tdata (bfd)->linker_section_pointers)
1774
1775 #define is_ppc_elf(bfd) \
1776 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1777 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1778
1779 /* Override the generic function because we store some extras. */
1780
1781 static bfd_boolean
1782 ppc_elf_mkobject (bfd *abfd)
1783 {
1784 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1785 PPC32_ELF_TDATA);
1786 }
1787
1788 /* Fix bad default arch selected for a 32 bit input bfd when the
1789 default is 64 bit. */
1790
1791 static bfd_boolean
1792 ppc_elf_object_p (bfd *abfd)
1793 {
1794 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1795 {
1796 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1797
1798 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1799 {
1800 /* Relies on arch after 64 bit default being 32 bit default. */
1801 abfd->arch_info = abfd->arch_info->next;
1802 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1803 }
1804 }
1805 return TRUE;
1806 }
1807
1808 /* Function to set whether a module needs the -mrelocatable bit set. */
1809
1810 static bfd_boolean
1811 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1812 {
1813 BFD_ASSERT (!elf_flags_init (abfd)
1814 || elf_elfheader (abfd)->e_flags == flags);
1815
1816 elf_elfheader (abfd)->e_flags = flags;
1817 elf_flags_init (abfd) = TRUE;
1818 return TRUE;
1819 }
1820
1821 /* Support for core dump NOTE sections. */
1822
1823 static bfd_boolean
1824 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1825 {
1826 int offset;
1827 unsigned int size;
1828
1829 switch (note->descsz)
1830 {
1831 default:
1832 return FALSE;
1833
1834 case 268: /* Linux/PPC. */
1835 /* pr_cursig */
1836 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1837
1838 /* pr_pid */
1839 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1840
1841 /* pr_reg */
1842 offset = 72;
1843 size = 192;
1844
1845 break;
1846 }
1847
1848 /* Make a ".reg/999" section. */
1849 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1850 size, note->descpos + offset);
1851 }
1852
1853 static bfd_boolean
1854 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1855 {
1856 switch (note->descsz)
1857 {
1858 default:
1859 return FALSE;
1860
1861 case 128: /* Linux/PPC elf_prpsinfo. */
1862 elf_tdata (abfd)->core_program
1863 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1864 elf_tdata (abfd)->core_command
1865 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1866 }
1867
1868 /* Note that for some reason, a spurious space is tacked
1869 onto the end of the args in some (at least one anyway)
1870 implementations, so strip it off if it exists. */
1871
1872 {
1873 char *command = elf_tdata (abfd)->core_command;
1874 int n = strlen (command);
1875
1876 if (0 < n && command[n - 1] == ' ')
1877 command[n - 1] = '\0';
1878 }
1879
1880 return TRUE;
1881 }
1882
1883 static char *
1884 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1885 {
1886 switch (note_type)
1887 {
1888 default:
1889 return NULL;
1890
1891 case NT_PRPSINFO:
1892 {
1893 char data[128];
1894 va_list ap;
1895
1896 va_start (ap, note_type);
1897 memset (data, 0, 32);
1898 strncpy (data + 32, va_arg (ap, const char *), 16);
1899 strncpy (data + 48, va_arg (ap, const char *), 80);
1900 va_end (ap);
1901 return elfcore_write_note (abfd, buf, bufsiz,
1902 "CORE", note_type, data, sizeof (data));
1903 }
1904
1905 case NT_PRSTATUS:
1906 {
1907 char data[268];
1908 va_list ap;
1909 long pid;
1910 int cursig;
1911 const void *greg;
1912
1913 va_start (ap, note_type);
1914 memset (data, 0, 72);
1915 pid = va_arg (ap, long);
1916 bfd_put_32 (abfd, pid, data + 24);
1917 cursig = va_arg (ap, int);
1918 bfd_put_16 (abfd, cursig, data + 12);
1919 greg = va_arg (ap, const void *);
1920 memcpy (data + 72, greg, 192);
1921 memset (data + 264, 0, 4);
1922 va_end (ap);
1923 return elfcore_write_note (abfd, buf, bufsiz,
1924 "CORE", note_type, data, sizeof (data));
1925 }
1926 }
1927 }
1928
1929 /* Return address for Ith PLT stub in section PLT, for relocation REL
1930 or (bfd_vma) -1 if it should not be included. */
1931
1932 static bfd_vma
1933 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1934 const asection *plt ATTRIBUTE_UNUSED,
1935 const arelent *rel)
1936 {
1937 return rel->address;
1938 }
1939
1940 /* Handle a PowerPC specific section when reading an object file. This
1941 is called when bfd_section_from_shdr finds a section with an unknown
1942 type. */
1943
1944 static bfd_boolean
1945 ppc_elf_section_from_shdr (bfd *abfd,
1946 Elf_Internal_Shdr *hdr,
1947 const char *name,
1948 int shindex)
1949 {
1950 asection *newsect;
1951 flagword flags;
1952
1953 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1954 return FALSE;
1955
1956 newsect = hdr->bfd_section;
1957 flags = bfd_get_section_flags (abfd, newsect);
1958 if (hdr->sh_flags & SHF_EXCLUDE)
1959 flags |= SEC_EXCLUDE;
1960
1961 if (hdr->sh_type == SHT_ORDERED)
1962 flags |= SEC_SORT_ENTRIES;
1963
1964 bfd_set_section_flags (abfd, newsect, flags);
1965 return TRUE;
1966 }
1967
1968 /* Set up any other section flags and such that may be necessary. */
1969
1970 static bfd_boolean
1971 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1972 Elf_Internal_Shdr *shdr,
1973 asection *asect)
1974 {
1975 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1976 shdr->sh_flags |= SHF_EXCLUDE;
1977
1978 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1979 shdr->sh_type = SHT_ORDERED;
1980
1981 return TRUE;
1982 }
1983
1984 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1985 need to bump up the number of section headers. */
1986
1987 static int
1988 ppc_elf_additional_program_headers (bfd *abfd,
1989 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1990 {
1991 asection *s;
1992 int ret = 0;
1993
1994 s = bfd_get_section_by_name (abfd, ".sbss2");
1995 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1996 ++ret;
1997
1998 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1999 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2000 ++ret;
2001
2002 return ret;
2003 }
2004
2005 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2006 .PPC.EMB.sbss0 a normal section, and not a bss section so
2007 that the linker doesn't crater when trying to make more than
2008 2 sections. */
2009
2010 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2011 {
2012 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2013 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2014 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2015 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2016 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2017 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2018 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2019 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2020 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2021 { NULL, 0, 0, 0, 0 }
2022 };
2023
2024 /* This is what we want for new plt/got. */
2025 static struct bfd_elf_special_section ppc_alt_plt =
2026 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2027
2028 static const struct bfd_elf_special_section *
2029 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2030 {
2031 const struct bfd_elf_special_section *ssect;
2032
2033 /* See if this is one of the special sections. */
2034 if (sec->name == NULL)
2035 return NULL;
2036
2037 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2038 sec->use_rela_p);
2039 if (ssect != NULL)
2040 {
2041 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2042 ssect = &ppc_alt_plt;
2043 return ssect;
2044 }
2045
2046 return _bfd_elf_get_sec_type_attr (abfd, sec);
2047 }
2048 \f
2049 /* Very simple linked list structure for recording apuinfo values. */
2050 typedef struct apuinfo_list
2051 {
2052 struct apuinfo_list *next;
2053 unsigned long value;
2054 }
2055 apuinfo_list;
2056
2057 static apuinfo_list *head;
2058
2059
2060 static void
2061 apuinfo_list_init (void)
2062 {
2063 head = NULL;
2064 }
2065
2066 static void
2067 apuinfo_list_add (unsigned long value)
2068 {
2069 apuinfo_list *entry = head;
2070
2071 while (entry != NULL)
2072 {
2073 if (entry->value == value)
2074 return;
2075 entry = entry->next;
2076 }
2077
2078 entry = bfd_malloc (sizeof (* entry));
2079 if (entry == NULL)
2080 return;
2081
2082 entry->value = value;
2083 entry->next = head;
2084 head = entry;
2085 }
2086
2087 static unsigned
2088 apuinfo_list_length (void)
2089 {
2090 apuinfo_list *entry;
2091 unsigned long count;
2092
2093 for (entry = head, count = 0;
2094 entry;
2095 entry = entry->next)
2096 ++ count;
2097
2098 return count;
2099 }
2100
2101 static inline unsigned long
2102 apuinfo_list_element (unsigned long number)
2103 {
2104 apuinfo_list * entry;
2105
2106 for (entry = head;
2107 entry && number --;
2108 entry = entry->next)
2109 ;
2110
2111 return entry ? entry->value : 0;
2112 }
2113
2114 static void
2115 apuinfo_list_finish (void)
2116 {
2117 apuinfo_list *entry;
2118
2119 for (entry = head; entry;)
2120 {
2121 apuinfo_list *next = entry->next;
2122 free (entry);
2123 entry = next;
2124 }
2125
2126 head = NULL;
2127 }
2128
2129 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2130 #define APUINFO_LABEL "APUinfo"
2131
2132 /* Scan the input BFDs and create a linked list of
2133 the APUinfo values that will need to be emitted. */
2134
2135 static void
2136 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2137 {
2138 bfd *ibfd;
2139 asection *asec;
2140 char *buffer;
2141 unsigned num_input_sections;
2142 bfd_size_type output_section_size;
2143 unsigned i;
2144 unsigned num_entries;
2145 unsigned long offset;
2146 unsigned long length;
2147 const char *error_message = NULL;
2148
2149 if (link_info == NULL)
2150 return;
2151
2152 /* Scan the input bfds, looking for apuinfo sections. */
2153 num_input_sections = 0;
2154 output_section_size = 0;
2155
2156 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2157 {
2158 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2159 if (asec)
2160 {
2161 ++ num_input_sections;
2162 output_section_size += asec->size;
2163 }
2164 }
2165
2166 /* We need at least one input sections
2167 in order to make merging worthwhile. */
2168 if (num_input_sections < 1)
2169 return;
2170
2171 /* Just make sure that the output section exists as well. */
2172 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2173 if (asec == NULL)
2174 return;
2175
2176 /* Allocate a buffer for the contents of the input sections. */
2177 buffer = bfd_malloc (output_section_size);
2178 if (buffer == NULL)
2179 return;
2180
2181 offset = 0;
2182 apuinfo_list_init ();
2183
2184 /* Read in the input sections contents. */
2185 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2186 {
2187 unsigned long datum;
2188 char *ptr;
2189
2190 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2191 if (asec == NULL)
2192 continue;
2193
2194 length = asec->size;
2195 if (length < 24)
2196 {
2197 error_message = _("corrupt or empty %s section in %B");
2198 goto fail;
2199 }
2200
2201 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2202 || (bfd_bread (buffer + offset, length, ibfd) != length))
2203 {
2204 error_message = _("unable to read in %s section from %B");
2205 goto fail;
2206 }
2207
2208 /* Process the contents of the section. */
2209 ptr = buffer + offset;
2210 error_message = _("corrupt %s section in %B");
2211
2212 /* Verify the contents of the header. Note - we have to
2213 extract the values this way in order to allow for a
2214 host whose endian-ness is different from the target. */
2215 datum = bfd_get_32 (ibfd, ptr);
2216 if (datum != sizeof APUINFO_LABEL)
2217 goto fail;
2218
2219 datum = bfd_get_32 (ibfd, ptr + 8);
2220 if (datum != 0x2)
2221 goto fail;
2222
2223 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2224 goto fail;
2225
2226 /* Get the number of bytes used for apuinfo entries. */
2227 datum = bfd_get_32 (ibfd, ptr + 4);
2228 if (datum + 20 != length)
2229 goto fail;
2230
2231 /* Make sure that we do not run off the end of the section. */
2232 if (offset + length > output_section_size)
2233 goto fail;
2234
2235 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2236 for (i = 0; i < datum; i += 4)
2237 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2238
2239 /* Update the offset. */
2240 offset += length;
2241 }
2242
2243 error_message = NULL;
2244
2245 /* Compute the size of the output section. */
2246 num_entries = apuinfo_list_length ();
2247 output_section_size = 20 + num_entries * 4;
2248
2249 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2250
2251 if (! bfd_set_section_size (abfd, asec, output_section_size))
2252 ibfd = abfd,
2253 error_message = _("warning: unable to set size of %s section in %B");
2254
2255 fail:
2256 free (buffer);
2257
2258 if (error_message)
2259 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2260 }
2261
2262 /* Prevent the output section from accumulating the input sections'
2263 contents. We have already stored this in our linked list structure. */
2264
2265 static bfd_boolean
2266 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2267 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2268 asection *asec,
2269 bfd_byte *contents ATTRIBUTE_UNUSED)
2270 {
2271 return (apuinfo_list_length ()
2272 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2273 }
2274
2275 /* Finally we can generate the output section. */
2276
2277 static void
2278 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2279 {
2280 bfd_byte *buffer;
2281 asection *asec;
2282 unsigned i;
2283 unsigned num_entries;
2284 bfd_size_type length;
2285
2286 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2287 if (asec == NULL)
2288 return;
2289
2290 if (apuinfo_list_length () == 0)
2291 return;
2292
2293 length = asec->size;
2294 if (length < 20)
2295 return;
2296
2297 buffer = bfd_malloc (length);
2298 if (buffer == NULL)
2299 {
2300 (*_bfd_error_handler)
2301 (_("failed to allocate space for new APUinfo section."));
2302 return;
2303 }
2304
2305 /* Create the apuinfo header. */
2306 num_entries = apuinfo_list_length ();
2307 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2308 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2309 bfd_put_32 (abfd, 0x2, buffer + 8);
2310 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2311
2312 length = 20;
2313 for (i = 0; i < num_entries; i++)
2314 {
2315 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2316 length += 4;
2317 }
2318
2319 if (length != asec->size)
2320 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2321
2322 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2323 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2324
2325 free (buffer);
2326
2327 apuinfo_list_finish ();
2328 }
2329 \f
2330 static bfd_boolean
2331 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2332 {
2333 bfd_byte buf[GLINK_ENTRY_SIZE];
2334
2335 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2336 return FALSE;
2337
2338 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2339 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2340 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2341 && bfd_get_32 (abfd, buf + 12) == BCTR);
2342 }
2343
2344 static bfd_boolean
2345 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2346 {
2347 bfd_vma vma = *(bfd_vma *) ptr;
2348 return ((section->flags & SEC_ALLOC) != 0
2349 && section->vma <= vma
2350 && vma < section->vma + section->size);
2351 }
2352
2353 static long
2354 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2355 long dynsymcount, asymbol **dynsyms,
2356 asymbol **ret)
2357 {
2358 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2359 asection *plt, *relplt, *dynamic, *glink;
2360 bfd_vma glink_vma = 0;
2361 bfd_vma resolv_vma = 0;
2362 bfd_vma stub_vma;
2363 asymbol *s;
2364 arelent *p;
2365 long count, i;
2366 size_t size;
2367 char *names;
2368 bfd_byte buf[4];
2369
2370 *ret = NULL;
2371
2372 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2373 return 0;
2374
2375 if (dynsymcount <= 0)
2376 return 0;
2377
2378 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2379 if (relplt == NULL)
2380 return 0;
2381
2382 plt = bfd_get_section_by_name (abfd, ".plt");
2383 if (plt == NULL)
2384 return 0;
2385
2386 /* Call common code to handle old-style executable PLTs. */
2387 if (elf_section_flags (plt) & SHF_EXECINSTR)
2388 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2389 dynsymcount, dynsyms, ret);
2390
2391 /* If this object was prelinked, the prelinker stored the address
2392 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2393 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2394 if (dynamic != NULL)
2395 {
2396 bfd_byte *dynbuf, *extdyn, *extdynend;
2397 size_t extdynsize;
2398 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2399
2400 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2401 return -1;
2402
2403 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2404 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2405
2406 extdyn = dynbuf;
2407 extdynend = extdyn + dynamic->size;
2408 for (; extdyn < extdynend; extdyn += extdynsize)
2409 {
2410 Elf_Internal_Dyn dyn;
2411 (*swap_dyn_in) (abfd, extdyn, &dyn);
2412
2413 if (dyn.d_tag == DT_NULL)
2414 break;
2415
2416 if (dyn.d_tag == DT_PPC_GOT)
2417 {
2418 unsigned int g_o_t = dyn.d_un.d_val;
2419 asection *got = bfd_get_section_by_name (abfd, ".got");
2420 if (got != NULL
2421 && bfd_get_section_contents (abfd, got, buf,
2422 g_o_t - got->vma + 4, 4))
2423 glink_vma = bfd_get_32 (abfd, buf);
2424 break;
2425 }
2426 }
2427 free (dynbuf);
2428 }
2429
2430 /* Otherwise we read the first plt entry. */
2431 if (glink_vma == 0)
2432 {
2433 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2434 glink_vma = bfd_get_32 (abfd, buf);
2435 }
2436
2437 if (glink_vma == 0)
2438 return 0;
2439
2440 /* The .glink section usually does not survive the final
2441 link; search for the section (usually .text) where the
2442 glink stubs now reside. */
2443 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2444 if (glink == NULL)
2445 return 0;
2446
2447 /* Determine glink PLT resolver by reading the relative branch
2448 from the first glink stub. */
2449 if (bfd_get_section_contents (abfd, glink, buf,
2450 glink_vma - glink->vma, 4))
2451 {
2452 unsigned int insn = bfd_get_32 (abfd, buf);
2453
2454 /* The first glink stub may either branch to the resolver ... */
2455 insn ^= B;
2456 if ((insn & ~0x3fffffc) == 0)
2457 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2458
2459 /* ... or fall through a bunch of NOPs. */
2460 else if ((insn ^ B ^ NOP) == 0)
2461 for (i = 4;
2462 bfd_get_section_contents (abfd, glink, buf,
2463 glink_vma - glink->vma + i, 4);
2464 i += 4)
2465 if (bfd_get_32 (abfd, buf) != NOP)
2466 {
2467 resolv_vma = glink_vma + i;
2468 break;
2469 }
2470 }
2471
2472 count = relplt->size / sizeof (Elf32_External_Rela);
2473 stub_vma = glink_vma - (bfd_vma) count * 16;
2474 /* If the stubs are those for -shared/-pie then we might have
2475 multiple stubs for each plt entry. If that is the case then
2476 there is no way to associate stubs with their plt entries short
2477 of figuring out the GOT pointer value used in the stub. */
2478 if (!is_nonpic_glink_stub (abfd, glink,
2479 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2480 return 0;
2481
2482 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2483 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2484 return -1;
2485
2486 size = count * sizeof (asymbol);
2487 p = relplt->relocation;
2488 for (i = 0; i < count; i++, p++)
2489 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2490
2491 size += sizeof (asymbol) + sizeof ("__glink");
2492
2493 if (resolv_vma)
2494 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2495
2496 s = *ret = bfd_malloc (size);
2497 if (s == NULL)
2498 return -1;
2499
2500 names = (char *) (s + count + 1 + (resolv_vma != 0));
2501 p = relplt->relocation;
2502 for (i = 0; i < count; i++, p++)
2503 {
2504 size_t len;
2505
2506 *s = **p->sym_ptr_ptr;
2507 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2508 we are defining a symbol, ensure one of them is set. */
2509 if ((s->flags & BSF_LOCAL) == 0)
2510 s->flags |= BSF_GLOBAL;
2511 s->flags |= BSF_SYNTHETIC;
2512 s->section = glink;
2513 s->value = stub_vma - glink->vma;
2514 s->name = names;
2515 s->udata.p = NULL;
2516 len = strlen ((*p->sym_ptr_ptr)->name);
2517 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2518 names += len;
2519 memcpy (names, "@plt", sizeof ("@plt"));
2520 names += sizeof ("@plt");
2521 ++s;
2522 stub_vma += 16;
2523 }
2524
2525 /* Add a symbol at the start of the glink branch table. */
2526 memset (s, 0, sizeof *s);
2527 s->the_bfd = abfd;
2528 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2529 s->section = glink;
2530 s->value = glink_vma - glink->vma;
2531 s->name = names;
2532 memcpy (names, "__glink", sizeof ("__glink"));
2533 names += sizeof ("__glink");
2534 s++;
2535 count++;
2536
2537 if (resolv_vma)
2538 {
2539 /* Add a symbol for the glink PLT resolver. */
2540 memset (s, 0, sizeof *s);
2541 s->the_bfd = abfd;
2542 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2543 s->section = glink;
2544 s->value = resolv_vma - glink->vma;
2545 s->name = names;
2546 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2547 names += sizeof ("__glink_PLTresolve");
2548 s++;
2549 count++;
2550 }
2551
2552 return count;
2553 }
2554 \f
2555 /* The following functions are specific to the ELF linker, while
2556 functions above are used generally. They appear in this file more
2557 or less in the order in which they are called. eg.
2558 ppc_elf_check_relocs is called early in the link process,
2559 ppc_elf_finish_dynamic_sections is one of the last functions
2560 called. */
2561
2562 /* The PPC linker needs to keep track of the number of relocs that it
2563 decides to copy as dynamic relocs in check_relocs for each symbol.
2564 This is so that it can later discard them if they are found to be
2565 unnecessary. We store the information in a field extending the
2566 regular ELF linker hash table. */
2567
2568 struct ppc_elf_dyn_relocs
2569 {
2570 struct ppc_elf_dyn_relocs *next;
2571
2572 /* The input section of the reloc. */
2573 asection *sec;
2574
2575 /* Total number of relocs copied for the input section. */
2576 bfd_size_type count;
2577
2578 /* Number of pc-relative relocs copied for the input section. */
2579 bfd_size_type pc_count;
2580 };
2581
2582 /* Track PLT entries needed for a given symbol. We might need more
2583 than one glink entry per symbol. */
2584 struct plt_entry
2585 {
2586 struct plt_entry *next;
2587
2588 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2589 This field stores the offset into .got2 used to initialise the
2590 GOT pointer reg. It will always be at least 32768 (and for
2591 current gcc this is the only offset used). */
2592 bfd_vma addend;
2593
2594 /* The .got2 section. */
2595 asection *sec;
2596
2597 /* PLT refcount or offset. */
2598 union
2599 {
2600 bfd_signed_vma refcount;
2601 bfd_vma offset;
2602 } plt;
2603
2604 /* .glink stub offset. */
2605 bfd_vma glink_offset;
2606 };
2607
2608 /* Of those relocs that might be copied as dynamic relocs, this function
2609 selects those that must be copied when linking a shared library,
2610 even when the symbol is local. */
2611
2612 static int
2613 must_be_dyn_reloc (struct bfd_link_info *info,
2614 enum elf_ppc_reloc_type r_type)
2615 {
2616 switch (r_type)
2617 {
2618 default:
2619 return 1;
2620
2621 case R_PPC_REL24:
2622 case R_PPC_REL14:
2623 case R_PPC_REL14_BRTAKEN:
2624 case R_PPC_REL14_BRNTAKEN:
2625 case R_PPC_REL32:
2626 return 0;
2627
2628 case R_PPC_TPREL32:
2629 case R_PPC_TPREL16:
2630 case R_PPC_TPREL16_LO:
2631 case R_PPC_TPREL16_HI:
2632 case R_PPC_TPREL16_HA:
2633 return !info->executable;
2634 }
2635 }
2636
2637 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2638 copying dynamic variables from a shared lib into an app's dynbss
2639 section, and instead use a dynamic relocation to point into the
2640 shared lib. */
2641 #define ELIMINATE_COPY_RELOCS 1
2642
2643 /* PPC ELF linker hash entry. */
2644
2645 struct ppc_elf_link_hash_entry
2646 {
2647 struct elf_link_hash_entry elf;
2648
2649 /* If this symbol is used in the linker created sections, the processor
2650 specific backend uses this field to map the field into the offset
2651 from the beginning of the section. */
2652 elf_linker_section_pointers_t *linker_section_pointer;
2653
2654 /* Track dynamic relocs copied for this symbol. */
2655 struct ppc_elf_dyn_relocs *dyn_relocs;
2656
2657 /* Contexts in which symbol is used in the GOT (or TOC).
2658 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2659 corresponding relocs are encountered during check_relocs.
2660 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2661 indicate the corresponding GOT entry type is not needed. */
2662 #define TLS_GD 1 /* GD reloc. */
2663 #define TLS_LD 2 /* LD reloc. */
2664 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2665 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2666 #define TLS_TLS 16 /* Any TLS reloc. */
2667 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2668 char tls_mask;
2669
2670 /* Nonzero if we have seen a small data relocation referring to this
2671 symbol. */
2672 unsigned char has_sda_refs;
2673 };
2674
2675 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2676
2677 /* PPC ELF linker hash table. */
2678
2679 struct ppc_elf_link_hash_table
2680 {
2681 struct elf_link_hash_table elf;
2682
2683 /* Short-cuts to get to dynamic linker sections. */
2684 asection *got;
2685 asection *relgot;
2686 asection *glink;
2687 asection *plt;
2688 asection *relplt;
2689 asection *dynbss;
2690 asection *relbss;
2691 asection *dynsbss;
2692 asection *relsbss;
2693 elf_linker_section_t sdata[2];
2694 asection *sbss;
2695
2696 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2697 asection *srelplt2;
2698
2699 /* The .got.plt section (VxWorks only)*/
2700 asection *sgotplt;
2701
2702 /* Shortcut to __tls_get_addr. */
2703 struct elf_link_hash_entry *tls_get_addr;
2704
2705 /* The bfd that forced an old-style PLT. */
2706 bfd *old_bfd;
2707
2708 /* TLS local dynamic got entry handling. */
2709 union {
2710 bfd_signed_vma refcount;
2711 bfd_vma offset;
2712 } tlsld_got;
2713
2714 /* Offset of branch table to PltResolve function in glink. */
2715 bfd_vma glink_pltresolve;
2716
2717 /* Size of reserved GOT entries. */
2718 unsigned int got_header_size;
2719 /* Non-zero if allocating the header left a gap. */
2720 unsigned int got_gap;
2721
2722 /* The type of PLT we have chosen to use. */
2723 enum ppc_elf_plt_type plt_type;
2724
2725 /* Set if we should emit symbols for stubs. */
2726 unsigned int emit_stub_syms:1;
2727
2728 /* True if the target system is VxWorks. */
2729 unsigned int is_vxworks:1;
2730
2731 /* The size of PLT entries. */
2732 int plt_entry_size;
2733 /* The distance between adjacent PLT slots. */
2734 int plt_slot_size;
2735 /* The size of the first PLT entry. */
2736 int plt_initial_entry_size;
2737
2738 /* Small local sym to section mapping cache. */
2739 struct sym_sec_cache sym_sec;
2740 };
2741
2742 /* Get the PPC ELF linker hash table from a link_info structure. */
2743
2744 #define ppc_elf_hash_table(p) \
2745 ((struct ppc_elf_link_hash_table *) (p)->hash)
2746
2747 /* Create an entry in a PPC ELF linker hash table. */
2748
2749 static struct bfd_hash_entry *
2750 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2751 struct bfd_hash_table *table,
2752 const char *string)
2753 {
2754 /* Allocate the structure if it has not already been allocated by a
2755 subclass. */
2756 if (entry == NULL)
2757 {
2758 entry = bfd_hash_allocate (table,
2759 sizeof (struct ppc_elf_link_hash_entry));
2760 if (entry == NULL)
2761 return entry;
2762 }
2763
2764 /* Call the allocation method of the superclass. */
2765 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2766 if (entry != NULL)
2767 {
2768 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2769 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2770 ppc_elf_hash_entry (entry)->tls_mask = 0;
2771 }
2772
2773 return entry;
2774 }
2775
2776 /* Create a PPC ELF linker hash table. */
2777
2778 static struct bfd_link_hash_table *
2779 ppc_elf_link_hash_table_create (bfd *abfd)
2780 {
2781 struct ppc_elf_link_hash_table *ret;
2782
2783 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2784 if (ret == NULL)
2785 return NULL;
2786
2787 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2788 ppc_elf_link_hash_newfunc,
2789 sizeof (struct ppc_elf_link_hash_entry)))
2790 {
2791 free (ret);
2792 return NULL;
2793 }
2794
2795 ret->elf.init_plt_refcount.refcount = 0;
2796 ret->elf.init_plt_refcount.glist = NULL;
2797 ret->elf.init_plt_offset.offset = 0;
2798 ret->elf.init_plt_offset.glist = NULL;
2799
2800 ret->sdata[0].name = ".sdata";
2801 ret->sdata[0].sym_name = "_SDA_BASE_";
2802 ret->sdata[0].bss_name = ".sbss";
2803
2804 ret->sdata[1].name = ".sdata2";
2805 ret->sdata[1].sym_name = "_SDA2_BASE_";
2806 ret->sdata[1].bss_name = ".sbss2";
2807
2808 ret->plt_entry_size = 12;
2809 ret->plt_slot_size = 8;
2810 ret->plt_initial_entry_size = 72;
2811
2812 return &ret->elf.root;
2813 }
2814
2815 /* Create .got and the related sections. */
2816
2817 static bfd_boolean
2818 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2819 {
2820 struct ppc_elf_link_hash_table *htab;
2821 asection *s;
2822 flagword flags;
2823
2824 if (!_bfd_elf_create_got_section (abfd, info))
2825 return FALSE;
2826
2827 htab = ppc_elf_hash_table (info);
2828 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2829 if (s == NULL)
2830 abort ();
2831
2832 if (htab->is_vxworks)
2833 {
2834 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2835 if (!htab->sgotplt)
2836 abort ();
2837 }
2838 else
2839 {
2840 /* The powerpc .got has a blrl instruction in it. Mark it
2841 executable. */
2842 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2843 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2844 if (!bfd_set_section_flags (abfd, s, flags))
2845 return FALSE;
2846 }
2847
2848 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2849 | SEC_LINKER_CREATED | SEC_READONLY);
2850 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2851 if (!htab->relgot
2852 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2853 return FALSE;
2854
2855 return TRUE;
2856 }
2857
2858 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2859 to output sections (just like _bfd_elf_create_dynamic_sections has
2860 to create .dynbss and .rela.bss). */
2861
2862 static bfd_boolean
2863 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2864 {
2865 struct ppc_elf_link_hash_table *htab;
2866 asection *s;
2867 flagword flags;
2868
2869 htab = ppc_elf_hash_table (info);
2870
2871 if (htab->got == NULL
2872 && !ppc_elf_create_got (abfd, info))
2873 return FALSE;
2874
2875 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2876 return FALSE;
2877
2878 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2879 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2880
2881 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2882 htab->glink = s;
2883 if (s == NULL
2884 || !bfd_set_section_alignment (abfd, s, 4))
2885 return FALSE;
2886
2887 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2888 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2889 SEC_ALLOC | SEC_LINKER_CREATED);
2890 htab->dynsbss = s;
2891 if (s == NULL)
2892 return FALSE;
2893
2894 if (! info->shared)
2895 {
2896 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2897 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2898 htab->relsbss = s;
2899 if (s == NULL
2900 || ! bfd_set_section_alignment (abfd, s, 2))
2901 return FALSE;
2902 }
2903
2904 if (htab->is_vxworks
2905 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2906 return FALSE;
2907
2908 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2909 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2910 if (s == NULL)
2911 abort ();
2912
2913 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2914 if (htab->plt_type == PLT_VXWORKS)
2915 /* The VxWorks PLT is a loaded section with contents. */
2916 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2917 return bfd_set_section_flags (abfd, s, flags);
2918 }
2919
2920 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2921
2922 static void
2923 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2924 struct elf_link_hash_entry *dir,
2925 struct elf_link_hash_entry *ind)
2926 {
2927 struct ppc_elf_link_hash_entry *edir, *eind;
2928
2929 edir = (struct ppc_elf_link_hash_entry *) dir;
2930 eind = (struct ppc_elf_link_hash_entry *) ind;
2931
2932 if (eind->dyn_relocs != NULL)
2933 {
2934 if (edir->dyn_relocs != NULL)
2935 {
2936 struct ppc_elf_dyn_relocs **pp;
2937 struct ppc_elf_dyn_relocs *p;
2938
2939 /* Add reloc counts against the indirect sym to the direct sym
2940 list. Merge any entries against the same section. */
2941 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2942 {
2943 struct ppc_elf_dyn_relocs *q;
2944
2945 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2946 if (q->sec == p->sec)
2947 {
2948 q->pc_count += p->pc_count;
2949 q->count += p->count;
2950 *pp = p->next;
2951 break;
2952 }
2953 if (q == NULL)
2954 pp = &p->next;
2955 }
2956 *pp = edir->dyn_relocs;
2957 }
2958
2959 edir->dyn_relocs = eind->dyn_relocs;
2960 eind->dyn_relocs = NULL;
2961 }
2962
2963 edir->tls_mask |= eind->tls_mask;
2964 edir->has_sda_refs |= eind->has_sda_refs;
2965
2966 /* If called to transfer flags for a weakdef during processing
2967 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2968 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2969 if (!(ELIMINATE_COPY_RELOCS
2970 && eind->elf.root.type != bfd_link_hash_indirect
2971 && edir->elf.dynamic_adjusted))
2972 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2973
2974 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2975 edir->elf.ref_regular |= eind->elf.ref_regular;
2976 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2977 edir->elf.needs_plt |= eind->elf.needs_plt;
2978 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2979
2980 /* If we were called to copy over info for a weak sym, that's all. */
2981 if (eind->elf.root.type != bfd_link_hash_indirect)
2982 return;
2983
2984 /* Copy over the GOT refcount entries that we may have already seen to
2985 the symbol which just became indirect. */
2986 edir->elf.got.refcount += eind->elf.got.refcount;
2987 eind->elf.got.refcount = 0;
2988
2989 /* And plt entries. */
2990 if (eind->elf.plt.plist != NULL)
2991 {
2992 if (edir->elf.plt.plist != NULL)
2993 {
2994 struct plt_entry **entp;
2995 struct plt_entry *ent;
2996
2997 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2998 {
2999 struct plt_entry *dent;
3000
3001 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3002 if (dent->sec == ent->sec && dent->addend == ent->addend)
3003 {
3004 dent->plt.refcount += ent->plt.refcount;
3005 *entp = ent->next;
3006 break;
3007 }
3008 if (dent == NULL)
3009 entp = &ent->next;
3010 }
3011 *entp = edir->elf.plt.plist;
3012 }
3013
3014 edir->elf.plt.plist = eind->elf.plt.plist;
3015 eind->elf.plt.plist = NULL;
3016 }
3017
3018 if (eind->elf.dynindx != -1)
3019 {
3020 if (edir->elf.dynindx != -1)
3021 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3022 edir->elf.dynstr_index);
3023 edir->elf.dynindx = eind->elf.dynindx;
3024 edir->elf.dynstr_index = eind->elf.dynstr_index;
3025 eind->elf.dynindx = -1;
3026 eind->elf.dynstr_index = 0;
3027 }
3028 }
3029
3030 /* Hook called by the linker routine which adds symbols from an object
3031 file. We use it to put .comm items in .sbss, and not .bss. */
3032
3033 static bfd_boolean
3034 ppc_elf_add_symbol_hook (bfd *abfd,
3035 struct bfd_link_info *info,
3036 Elf_Internal_Sym *sym,
3037 const char **namep ATTRIBUTE_UNUSED,
3038 flagword *flagsp ATTRIBUTE_UNUSED,
3039 asection **secp,
3040 bfd_vma *valp)
3041 {
3042 if (sym->st_shndx == SHN_COMMON
3043 && !info->relocatable
3044 && is_ppc_elf (info->output_bfd)
3045 && sym->st_size <= elf_gp_size (abfd))
3046 {
3047 /* Common symbols less than or equal to -G nn bytes are automatically
3048 put into .sbss. */
3049 struct ppc_elf_link_hash_table *htab;
3050
3051 htab = ppc_elf_hash_table (info);
3052 if (htab->sbss == NULL)
3053 {
3054 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3055
3056 if (!htab->elf.dynobj)
3057 htab->elf.dynobj = abfd;
3058
3059 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3060 ".sbss",
3061 flags);
3062 if (htab->sbss == NULL)
3063 return FALSE;
3064 }
3065
3066 *secp = htab->sbss;
3067 *valp = sym->st_size;
3068 }
3069
3070 return TRUE;
3071 }
3072 \f
3073 static bfd_boolean
3074 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
3075 elf_linker_section_t *lsect)
3076 {
3077 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3078 TRUE, FALSE, TRUE);
3079 if (lsect->sym == NULL)
3080 return FALSE;
3081 if (lsect->sym->root.type == bfd_link_hash_new)
3082 lsect->sym->non_elf = 0;
3083 lsect->sym->ref_regular = 1;
3084 return TRUE;
3085 }
3086
3087 /* Create a special linker section. */
3088
3089 static bfd_boolean
3090 ppc_elf_create_linker_section (bfd *abfd,
3091 struct bfd_link_info *info,
3092 flagword flags,
3093 elf_linker_section_t *lsect)
3094 {
3095 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3096 asection *s;
3097
3098 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3099 | SEC_LINKER_CREATED);
3100
3101 /* Record the first bfd that needs the special sections. */
3102 if (!htab->elf.dynobj)
3103 htab->elf.dynobj = abfd;
3104
3105 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3106 lsect->name,
3107 flags);
3108 if (s == NULL
3109 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3110 return FALSE;
3111 lsect->section = s;
3112
3113 return create_sdata_sym (htab, lsect);
3114 }
3115
3116 /* Find a linker generated pointer with a given addend and type. */
3117
3118 static elf_linker_section_pointers_t *
3119 elf_find_pointer_linker_section
3120 (elf_linker_section_pointers_t *linker_pointers,
3121 bfd_vma addend,
3122 elf_linker_section_t *lsect)
3123 {
3124 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3125 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3126 return linker_pointers;
3127
3128 return NULL;
3129 }
3130
3131 /* Allocate a pointer to live in a linker created section. */
3132
3133 static bfd_boolean
3134 elf_create_pointer_linker_section (bfd *abfd,
3135 elf_linker_section_t *lsect,
3136 struct elf_link_hash_entry *h,
3137 const Elf_Internal_Rela *rel)
3138 {
3139 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3140 elf_linker_section_pointers_t *linker_section_ptr;
3141 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3142 bfd_size_type amt;
3143
3144 BFD_ASSERT (lsect != NULL);
3145
3146 /* Is this a global symbol? */
3147 if (h != NULL)
3148 {
3149 struct ppc_elf_link_hash_entry *eh;
3150
3151 /* Has this symbol already been allocated? If so, our work is done. */
3152 eh = (struct ppc_elf_link_hash_entry *) h;
3153 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3154 rel->r_addend,
3155 lsect))
3156 return TRUE;
3157
3158 ptr_linker_section_ptr = &eh->linker_section_pointer;
3159 }
3160 else
3161 {
3162 BFD_ASSERT (is_ppc_elf (abfd));
3163
3164 /* Allocation of a pointer to a local symbol. */
3165 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3166
3167 /* Allocate a table to hold the local symbols if first time. */
3168 if (!ptr)
3169 {
3170 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3171
3172 amt = num_symbols;
3173 amt *= sizeof (elf_linker_section_pointers_t *);
3174 ptr = bfd_zalloc (abfd, amt);
3175
3176 if (!ptr)
3177 return FALSE;
3178
3179 elf_local_ptr_offsets (abfd) = ptr;
3180 }
3181
3182 /* Has this symbol already been allocated? If so, our work is done. */
3183 if (elf_find_pointer_linker_section (ptr[r_symndx],
3184 rel->r_addend,
3185 lsect))
3186 return TRUE;
3187
3188 ptr_linker_section_ptr = &ptr[r_symndx];
3189 }
3190
3191 /* Allocate space for a pointer in the linker section, and allocate
3192 a new pointer record from internal memory. */
3193 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3194 amt = sizeof (elf_linker_section_pointers_t);
3195 linker_section_ptr = bfd_alloc (abfd, amt);
3196
3197 if (!linker_section_ptr)
3198 return FALSE;
3199
3200 linker_section_ptr->next = *ptr_linker_section_ptr;
3201 linker_section_ptr->addend = rel->r_addend;
3202 linker_section_ptr->lsect = lsect;
3203 *ptr_linker_section_ptr = linker_section_ptr;
3204
3205 linker_section_ptr->offset = lsect->section->size;
3206 lsect->section->size += 4;
3207
3208 #ifdef DEBUG
3209 fprintf (stderr,
3210 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3211 lsect->name, (long) linker_section_ptr->offset,
3212 (long) lsect->section->size);
3213 #endif
3214
3215 return TRUE;
3216 }
3217
3218 static bfd_boolean
3219 update_local_sym_info (bfd *abfd,
3220 Elf_Internal_Shdr *symtab_hdr,
3221 unsigned long r_symndx,
3222 int tls_type)
3223 {
3224 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3225 char *local_got_tls_masks;
3226
3227 if (local_got_refcounts == NULL)
3228 {
3229 bfd_size_type size = symtab_hdr->sh_info;
3230
3231 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3232 local_got_refcounts = bfd_zalloc (abfd, size);
3233 if (local_got_refcounts == NULL)
3234 return FALSE;
3235 elf_local_got_refcounts (abfd) = local_got_refcounts;
3236 }
3237
3238 local_got_refcounts[r_symndx] += 1;
3239 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3240 local_got_tls_masks[r_symndx] |= tls_type;
3241 return TRUE;
3242 }
3243
3244 static bfd_boolean
3245 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
3246 asection *sec, bfd_vma addend)
3247 {
3248 struct plt_entry *ent;
3249
3250 if (addend < 32768)
3251 sec = NULL;
3252 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3253 if (ent->sec == sec && ent->addend == addend)
3254 break;
3255 if (ent == NULL)
3256 {
3257 bfd_size_type amt = sizeof (*ent);
3258 ent = bfd_alloc (abfd, amt);
3259 if (ent == NULL)
3260 return FALSE;
3261 ent->next = h->plt.plist;
3262 ent->sec = sec;
3263 ent->addend = addend;
3264 ent->plt.refcount = 0;
3265 h->plt.plist = ent;
3266 }
3267 ent->plt.refcount += 1;
3268 return TRUE;
3269 }
3270
3271 static struct plt_entry *
3272 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3273 {
3274 struct plt_entry *ent;
3275
3276 if (addend < 32768)
3277 sec = NULL;
3278 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3279 if (ent->sec == sec && ent->addend == addend)
3280 break;
3281 return ent;
3282 }
3283
3284 static void
3285 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3286 {
3287 (*_bfd_error_handler)
3288 (_("%B: relocation %s cannot be used when making a shared object"),
3289 abfd,
3290 ppc_elf_howto_table[r_type]->name);
3291 bfd_set_error (bfd_error_bad_value);
3292 }
3293
3294 /* Look through the relocs for a section during the first phase, and
3295 allocate space in the global offset table or procedure linkage
3296 table. */
3297
3298 static bfd_boolean
3299 ppc_elf_check_relocs (bfd *abfd,
3300 struct bfd_link_info *info,
3301 asection *sec,
3302 const Elf_Internal_Rela *relocs)
3303 {
3304 struct ppc_elf_link_hash_table *htab;
3305 Elf_Internal_Shdr *symtab_hdr;
3306 struct elf_link_hash_entry **sym_hashes;
3307 const Elf_Internal_Rela *rel;
3308 const Elf_Internal_Rela *rel_end;
3309 asection *got2, *sreloc;
3310 struct elf_link_hash_entry *tga;
3311
3312 if (info->relocatable)
3313 return TRUE;
3314
3315 /* Don't do anything special with non-loaded, non-alloced sections.
3316 In particular, any relocs in such sections should not affect GOT
3317 and PLT reference counting (ie. we don't allow them to create GOT
3318 or PLT entries), there's no possibility or desire to optimize TLS
3319 relocs, and there's not much point in propagating relocs to shared
3320 libs that the dynamic linker won't relocate. */
3321 if ((sec->flags & SEC_ALLOC) == 0)
3322 return TRUE;
3323
3324 #ifdef DEBUG
3325 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3326 sec, abfd);
3327 #endif
3328
3329 BFD_ASSERT (is_ppc_elf (abfd));
3330
3331 /* Initialize howto table if not already done. */
3332 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3333 ppc_elf_howto_init ();
3334
3335 htab = ppc_elf_hash_table (info);
3336 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3337 FALSE, FALSE, TRUE);
3338 symtab_hdr = &elf_symtab_hdr (abfd);
3339 sym_hashes = elf_sym_hashes (abfd);
3340 got2 = bfd_get_section_by_name (abfd, ".got2");
3341 sreloc = NULL;
3342
3343 rel_end = relocs + sec->reloc_count;
3344 for (rel = relocs; rel < rel_end; rel++)
3345 {
3346 unsigned long r_symndx;
3347 enum elf_ppc_reloc_type r_type;
3348 struct elf_link_hash_entry *h;
3349 int tls_type;
3350
3351 r_symndx = ELF32_R_SYM (rel->r_info);
3352 if (r_symndx < symtab_hdr->sh_info)
3353 h = NULL;
3354 else
3355 {
3356 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3357 while (h->root.type == bfd_link_hash_indirect
3358 || h->root.type == bfd_link_hash_warning)
3359 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3360 }
3361
3362 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3363 This shows up in particular in an R_PPC_ADDR32 in the eabi
3364 startup code. */
3365 if (h != NULL
3366 && htab->got == NULL
3367 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3368 {
3369 if (htab->elf.dynobj == NULL)
3370 htab->elf.dynobj = abfd;
3371 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3372 return FALSE;
3373 BFD_ASSERT (h == htab->elf.hgot);
3374 }
3375
3376 tls_type = 0;
3377 r_type = ELF32_R_TYPE (rel->r_info);
3378 if (h != NULL && h == tga)
3379 switch (r_type)
3380 {
3381 default:
3382 break;
3383
3384 case R_PPC_PLTREL24:
3385 case R_PPC_LOCAL24PC:
3386 case R_PPC_REL24:
3387 case R_PPC_REL14:
3388 case R_PPC_REL14_BRTAKEN:
3389 case R_PPC_REL14_BRNTAKEN:
3390 case R_PPC_ADDR24:
3391 case R_PPC_ADDR14:
3392 case R_PPC_ADDR14_BRTAKEN:
3393 case R_PPC_ADDR14_BRNTAKEN:
3394 if (rel != relocs
3395 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3396 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3397 /* We have a new-style __tls_get_addr call with a marker
3398 reloc. */
3399 ;
3400 else
3401 /* Mark this section as having an old-style call. */
3402 sec->has_tls_get_addr_call = 1;
3403 break;
3404 }
3405
3406 switch (r_type)
3407 {
3408 case R_PPC_TLSGD:
3409 case R_PPC_TLSLD:
3410 /* These special tls relocs tie a call to __tls_get_addr with
3411 its parameter symbol. */
3412 break;
3413
3414 case R_PPC_GOT_TLSLD16:
3415 case R_PPC_GOT_TLSLD16_LO:
3416 case R_PPC_GOT_TLSLD16_HI:
3417 case R_PPC_GOT_TLSLD16_HA:
3418 tls_type = TLS_TLS | TLS_LD;
3419 goto dogottls;
3420
3421 case R_PPC_GOT_TLSGD16:
3422 case R_PPC_GOT_TLSGD16_LO:
3423 case R_PPC_GOT_TLSGD16_HI:
3424 case R_PPC_GOT_TLSGD16_HA:
3425 tls_type = TLS_TLS | TLS_GD;
3426 goto dogottls;
3427
3428 case R_PPC_GOT_TPREL16:
3429 case R_PPC_GOT_TPREL16_LO:
3430 case R_PPC_GOT_TPREL16_HI:
3431 case R_PPC_GOT_TPREL16_HA:
3432 if (!info->executable)
3433 info->flags |= DF_STATIC_TLS;
3434 tls_type = TLS_TLS | TLS_TPREL;
3435 goto dogottls;
3436
3437 case R_PPC_GOT_DTPREL16:
3438 case R_PPC_GOT_DTPREL16_LO:
3439 case R_PPC_GOT_DTPREL16_HI:
3440 case R_PPC_GOT_DTPREL16_HA:
3441 tls_type = TLS_TLS | TLS_DTPREL;
3442 dogottls:
3443 sec->has_tls_reloc = 1;
3444 /* Fall thru */
3445
3446 /* GOT16 relocations */
3447 case R_PPC_GOT16:
3448 case R_PPC_GOT16_LO:
3449 case R_PPC_GOT16_HI:
3450 case R_PPC_GOT16_HA:
3451 /* This symbol requires a global offset table entry. */
3452 if (htab->got == NULL)
3453 {
3454 if (htab->elf.dynobj == NULL)
3455 htab->elf.dynobj = abfd;
3456 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3457 return FALSE;
3458 }
3459 if (h != NULL)
3460 {
3461 h->got.refcount += 1;
3462 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3463 }
3464 else
3465 /* This is a global offset table entry for a local symbol. */
3466 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3467 return FALSE;
3468 break;
3469
3470 /* Indirect .sdata relocation. */
3471 case R_PPC_EMB_SDAI16:
3472 if (info->shared)
3473 {
3474 bad_shared_reloc (abfd, r_type);
3475 return FALSE;
3476 }
3477 if (htab->sdata[0].section == NULL
3478 && !ppc_elf_create_linker_section (abfd, info, 0,
3479 &htab->sdata[0]))
3480 return FALSE;
3481 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3482 h, rel))
3483 return FALSE;
3484 if (h != NULL)
3485 {
3486 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3487 h->non_got_ref = TRUE;
3488 }
3489 break;
3490
3491 /* Indirect .sdata2 relocation. */
3492 case R_PPC_EMB_SDA2I16:
3493 if (info->shared)
3494 {
3495 bad_shared_reloc (abfd, r_type);
3496 return FALSE;
3497 }
3498 if (htab->sdata[1].section == NULL
3499 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3500 &htab->sdata[1]))
3501 return FALSE;
3502 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3503 h, rel))
3504 return FALSE;
3505 if (h != NULL)
3506 {
3507 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3508 h->non_got_ref = TRUE;
3509 }
3510 break;
3511
3512 case R_PPC_SDAREL16:
3513 if (info->shared)
3514 {
3515 bad_shared_reloc (abfd, r_type);
3516 return FALSE;
3517 }
3518 if (htab->sdata[0].sym == NULL
3519 && !create_sdata_sym (htab, &htab->sdata[0]))
3520 return FALSE;
3521 if (h != NULL)
3522 {
3523 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3524 h->non_got_ref = TRUE;
3525 }
3526 break;
3527
3528 case R_PPC_EMB_SDA2REL:
3529 if (info->shared)
3530 {
3531 bad_shared_reloc (abfd, r_type);
3532 return FALSE;
3533 }
3534 if (htab->sdata[1].sym == NULL
3535 && !create_sdata_sym (htab, &htab->sdata[1]))
3536 return FALSE;
3537 if (h != NULL)
3538 {
3539 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3540 h->non_got_ref = TRUE;
3541 }
3542 break;
3543
3544 case R_PPC_EMB_SDA21:
3545 case R_PPC_EMB_RELSDA:
3546 if (info->shared)
3547 {
3548 bad_shared_reloc (abfd, r_type);
3549 return FALSE;
3550 }
3551 if (htab->sdata[0].sym == NULL
3552 && !create_sdata_sym (htab, &htab->sdata[0]))
3553 return FALSE;
3554 if (htab->sdata[1].sym == NULL
3555 && !create_sdata_sym (htab, &htab->sdata[1]))
3556 return FALSE;
3557 if (h != NULL)
3558 {
3559 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3560 h->non_got_ref = TRUE;
3561 }
3562 break;
3563
3564 case R_PPC_EMB_NADDR32:
3565 case R_PPC_EMB_NADDR16:
3566 case R_PPC_EMB_NADDR16_LO:
3567 case R_PPC_EMB_NADDR16_HI:
3568 case R_PPC_EMB_NADDR16_HA:
3569 if (info->shared)
3570 {
3571 bad_shared_reloc (abfd, r_type);
3572 return FALSE;
3573 }
3574 if (h != NULL)
3575 h->non_got_ref = TRUE;
3576 break;
3577
3578 case R_PPC_PLT32:
3579 case R_PPC_PLTREL24:
3580 case R_PPC_PLTREL32:
3581 case R_PPC_PLT16_LO:
3582 case R_PPC_PLT16_HI:
3583 case R_PPC_PLT16_HA:
3584 #ifdef DEBUG
3585 fprintf (stderr, "Reloc requires a PLT entry\n");
3586 #endif
3587 /* This symbol requires a procedure linkage table entry. We
3588 actually build the entry in finish_dynamic_symbol,
3589 because this might be a case of linking PIC code without
3590 linking in any dynamic objects, in which case we don't
3591 need to generate a procedure linkage table after all. */
3592
3593 if (h == NULL)
3594 {
3595 /* It does not make sense to have a procedure linkage
3596 table entry for a local symbol. */
3597 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3598 "local symbol"),
3599 abfd,
3600 sec,
3601 (long) rel->r_offset,
3602 ppc_elf_howto_table[r_type]->name);
3603 bfd_set_error (bfd_error_bad_value);
3604 return FALSE;
3605 }
3606 else
3607 {
3608 bfd_vma addend = 0;
3609
3610 if (r_type == R_PPC_PLTREL24)
3611 {
3612 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3613 addend = rel->r_addend;
3614 }
3615 h->needs_plt = 1;
3616 if (!update_plt_info (abfd, h, got2, addend))
3617 return FALSE;
3618 }
3619 break;
3620
3621 /* The following relocations don't need to propagate the
3622 relocation if linking a shared object since they are
3623 section relative. */
3624 case R_PPC_SECTOFF:
3625 case R_PPC_SECTOFF_LO:
3626 case R_PPC_SECTOFF_HI:
3627 case R_PPC_SECTOFF_HA:
3628 case R_PPC_DTPREL16:
3629 case R_PPC_DTPREL16_LO:
3630 case R_PPC_DTPREL16_HI:
3631 case R_PPC_DTPREL16_HA:
3632 case R_PPC_TOC16:
3633 break;
3634
3635 case R_PPC_REL16:
3636 case R_PPC_REL16_LO:
3637 case R_PPC_REL16_HI:
3638 case R_PPC_REL16_HA:
3639 ppc_elf_tdata (abfd)->has_rel16 = 1;
3640 break;
3641
3642 /* These are just markers. */
3643 case R_PPC_TLS:
3644 case R_PPC_EMB_MRKREF:
3645 case R_PPC_NONE:
3646 case R_PPC_max:
3647 break;
3648
3649 /* These should only appear in dynamic objects. */
3650 case R_PPC_COPY:
3651 case R_PPC_GLOB_DAT:
3652 case R_PPC_JMP_SLOT:
3653 case R_PPC_RELATIVE:
3654 break;
3655
3656 /* These aren't handled yet. We'll report an error later. */
3657 case R_PPC_ADDR30:
3658 case R_PPC_EMB_RELSEC16:
3659 case R_PPC_EMB_RELST_LO:
3660 case R_PPC_EMB_RELST_HI:
3661 case R_PPC_EMB_RELST_HA:
3662 case R_PPC_EMB_BIT_FLD:
3663 break;
3664
3665 /* This refers only to functions defined in the shared library. */
3666 case R_PPC_LOCAL24PC:
3667 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3668 {
3669 htab->plt_type = PLT_OLD;
3670 htab->old_bfd = abfd;
3671 }
3672 break;
3673
3674 /* This relocation describes the C++ object vtable hierarchy.
3675 Reconstruct it for later use during GC. */
3676 case R_PPC_GNU_VTINHERIT:
3677 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3678 return FALSE;
3679 break;
3680
3681 /* This relocation describes which C++ vtable entries are actually
3682 used. Record for later use during GC. */
3683 case R_PPC_GNU_VTENTRY:
3684 BFD_ASSERT (h != NULL);
3685 if (h != NULL
3686 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3687 return FALSE;
3688 break;
3689
3690 /* We shouldn't really be seeing these. */
3691 case R_PPC_TPREL32:
3692 case R_PPC_TPREL16:
3693 case R_PPC_TPREL16_LO:
3694 case R_PPC_TPREL16_HI:
3695 case R_PPC_TPREL16_HA:
3696 if (!info->executable)
3697 info->flags |= DF_STATIC_TLS;
3698 goto dodyn;
3699
3700 /* Nor these. */
3701 case R_PPC_DTPMOD32:
3702 case R_PPC_DTPREL32:
3703 goto dodyn;
3704
3705 case R_PPC_REL32:
3706 if (h == NULL
3707 && got2 != NULL
3708 && (sec->flags & SEC_CODE) != 0
3709 && (info->shared || info->pie)
3710 && htab->plt_type == PLT_UNSET)
3711 {
3712 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3713 the start of a function, which assembles to a REL32
3714 reference to .got2. If we detect one of these, then
3715 force the old PLT layout because the linker cannot
3716 reliably deduce the GOT pointer value needed for
3717 PLT call stubs. */
3718 asection *s;
3719
3720 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3721 r_symndx);
3722 if (s == got2)
3723 {
3724 htab->plt_type = PLT_OLD;
3725 htab->old_bfd = abfd;
3726 }
3727 }
3728 if (h == NULL || h == htab->elf.hgot)
3729 break;
3730 /* fall through */
3731
3732 case R_PPC_ADDR32:
3733 case R_PPC_ADDR16:
3734 case R_PPC_ADDR16_LO:
3735 case R_PPC_ADDR16_HI:
3736 case R_PPC_ADDR16_HA:
3737 case R_PPC_UADDR32:
3738 case R_PPC_UADDR16:
3739 if (h != NULL && !info->shared)
3740 {
3741 /* We may need a plt entry if the symbol turns out to be
3742 a function defined in a dynamic object. */
3743 if (!update_plt_info (abfd, h, NULL, 0))
3744 return FALSE;
3745
3746 /* We may need a copy reloc too. */
3747 h->non_got_ref = 1;
3748 h->pointer_equality_needed = 1;
3749 }
3750 goto dodyn;
3751
3752 case R_PPC_REL24:
3753 case R_PPC_REL14:
3754 case R_PPC_REL14_BRTAKEN:
3755 case R_PPC_REL14_BRNTAKEN:
3756 if (h == NULL)
3757 break;
3758 if (h == htab->elf.hgot)
3759 {
3760 if (htab->plt_type == PLT_UNSET)
3761 {
3762 htab->plt_type = PLT_OLD;
3763 htab->old_bfd = abfd;
3764 }
3765 break;
3766 }
3767 /* fall through */
3768
3769 case R_PPC_ADDR24:
3770 case R_PPC_ADDR14:
3771 case R_PPC_ADDR14_BRTAKEN:
3772 case R_PPC_ADDR14_BRNTAKEN:
3773 if (h != NULL && !info->shared)
3774 {
3775 /* We may need a plt entry if the symbol turns out to be
3776 a function defined in a dynamic object. */
3777 if (!update_plt_info (abfd, h, NULL, 0))
3778 return FALSE;
3779 break;
3780 }
3781
3782 dodyn:
3783 /* If we are creating a shared library, and this is a reloc
3784 against a global symbol, or a non PC relative reloc
3785 against a local symbol, then we need to copy the reloc
3786 into the shared library. However, if we are linking with
3787 -Bsymbolic, we do not need to copy a reloc against a
3788 global symbol which is defined in an object we are
3789 including in the link (i.e., DEF_REGULAR is set). At
3790 this point we have not seen all the input files, so it is
3791 possible that DEF_REGULAR is not set now but will be set
3792 later (it is never cleared). In case of a weak definition,
3793 DEF_REGULAR may be cleared later by a strong definition in
3794 a shared library. We account for that possibility below by
3795 storing information in the dyn_relocs field of the hash
3796 table entry. A similar situation occurs when creating
3797 shared libraries and symbol visibility changes render the
3798 symbol local.
3799
3800 If on the other hand, we are creating an executable, we
3801 may need to keep relocations for symbols satisfied by a
3802 dynamic library if we manage to avoid copy relocs for the
3803 symbol. */
3804 if ((info->shared
3805 && (must_be_dyn_reloc (info, r_type)
3806 || (h != NULL
3807 && (! info->symbolic
3808 || h->root.type == bfd_link_hash_defweak
3809 || !h->def_regular))))
3810 || (ELIMINATE_COPY_RELOCS
3811 && !info->shared
3812 && h != NULL
3813 && (h->root.type == bfd_link_hash_defweak
3814 || !h->def_regular)))
3815 {
3816 struct ppc_elf_dyn_relocs *p;
3817 struct ppc_elf_dyn_relocs **head;
3818
3819 #ifdef DEBUG
3820 fprintf (stderr,
3821 "ppc_elf_check_relocs needs to "
3822 "create relocation for %s\n",
3823 (h && h->root.root.string
3824 ? h->root.root.string : "<unknown>"));
3825 #endif
3826 if (sreloc == NULL)
3827 {
3828 if (htab->elf.dynobj == NULL)
3829 htab->elf.dynobj = abfd;
3830
3831 sreloc = _bfd_elf_make_dynamic_reloc_section
3832 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3833
3834 if (sreloc == NULL)
3835 return FALSE;
3836 }
3837
3838 /* If this is a global symbol, we count the number of
3839 relocations we need for this symbol. */
3840 if (h != NULL)
3841 {
3842 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3843 }
3844 else
3845 {
3846 /* Track dynamic relocs needed for local syms too.
3847 We really need local syms available to do this
3848 easily. Oh well. */
3849
3850 asection *s;
3851 void *vpp;
3852
3853 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3854 sec, r_symndx);
3855 if (s == NULL)
3856 return FALSE;
3857
3858 vpp = &elf_section_data (s)->local_dynrel;
3859 head = (struct ppc_elf_dyn_relocs **) vpp;
3860 }
3861
3862 p = *head;
3863 if (p == NULL || p->sec != sec)
3864 {
3865 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3866 if (p == NULL)
3867 return FALSE;
3868 p->next = *head;
3869 *head = p;
3870 p->sec = sec;
3871 p->count = 0;
3872 p->pc_count = 0;
3873 }
3874
3875 p->count += 1;
3876 if (!must_be_dyn_reloc (info, r_type))
3877 p->pc_count += 1;
3878 }
3879
3880 break;
3881 }
3882 }
3883
3884 return TRUE;
3885 }
3886 \f
3887
3888 /* Merge object attributes from IBFD into OBFD. Raise an error if
3889 there are conflicting attributes. */
3890 static bfd_boolean
3891 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3892 {
3893 obj_attribute *in_attr, *in_attrs;
3894 obj_attribute *out_attr, *out_attrs;
3895
3896 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3897 {
3898 /* This is the first object. Copy the attributes. */
3899 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3900
3901 /* Use the Tag_null value to indicate the attributes have been
3902 initialized. */
3903 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3904
3905 return TRUE;
3906 }
3907
3908 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3909 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3910
3911 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3912 non-conflicting ones. */
3913 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3914 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3915 if (in_attr->i != out_attr->i)
3916 {
3917 out_attr->type = 1;
3918 if (out_attr->i == 0)
3919 out_attr->i = in_attr->i;
3920 else if (in_attr->i == 0)
3921 ;
3922 else if (out_attr->i == 1 && in_attr->i == 2)
3923 _bfd_error_handler
3924 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3925 else if (out_attr->i == 1 && in_attr->i == 3)
3926 _bfd_error_handler
3927 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3928 obfd, ibfd);
3929 else if (out_attr->i == 3 && in_attr->i == 1)
3930 _bfd_error_handler
3931 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3932 ibfd, obfd);
3933 else if (out_attr->i == 3 && in_attr->i == 2)
3934 _bfd_error_handler
3935 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
3936 ibfd, obfd);
3937 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
3938 _bfd_error_handler
3939 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3940 else if (in_attr->i > 3)
3941 _bfd_error_handler
3942 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3943 in_attr->i);
3944 else
3945 _bfd_error_handler
3946 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3947 out_attr->i);
3948 }
3949
3950 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3951 merge non-conflicting ones. */
3952 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3953 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3954 if (in_attr->i != out_attr->i)
3955 {
3956 const char *in_abi = NULL, *out_abi = NULL;
3957
3958 switch (in_attr->i)
3959 {
3960 case 1: in_abi = "generic"; break;
3961 case 2: in_abi = "AltiVec"; break;
3962 case 3: in_abi = "SPE"; break;
3963 }
3964
3965 switch (out_attr->i)
3966 {
3967 case 1: out_abi = "generic"; break;
3968 case 2: out_abi = "AltiVec"; break;
3969 case 3: out_abi = "SPE"; break;
3970 }
3971
3972 out_attr->type = 1;
3973 if (out_attr->i == 0)
3974 out_attr->i = in_attr->i;
3975 else if (in_attr->i == 0)
3976 ;
3977 /* For now, allow generic to transition to AltiVec or SPE
3978 without a warning. If GCC marked files with their stack
3979 alignment and used don't-care markings for files which are
3980 not affected by the vector ABI, we could warn about this
3981 case too. */
3982 else if (out_attr->i == 1)
3983 out_attr->i = in_attr->i;
3984 else if (in_attr->i == 1)
3985 ;
3986 else if (in_abi == NULL)
3987 _bfd_error_handler
3988 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3989 in_attr->i);
3990 else if (out_abi == NULL)
3991 _bfd_error_handler
3992 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3993 in_attr->i);
3994 else
3995 _bfd_error_handler
3996 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3997 ibfd, obfd, in_abi, out_abi);
3998 }
3999
4000 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4001 and merge non-conflicting ones. */
4002 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4003 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4004 if (in_attr->i != out_attr->i)
4005 {
4006 out_attr->type = 1;
4007 if (out_attr->i == 0)
4008 out_attr->i = in_attr->i;
4009 else if (in_attr->i == 0)
4010 ;
4011 else if (out_attr->i == 1 && in_attr->i == 2)
4012 _bfd_error_handler
4013 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4014 else if (out_attr->i == 2 && in_attr->i == 1)
4015 _bfd_error_handler
4016 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4017 else if (in_attr->i > 2)
4018 _bfd_error_handler
4019 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4020 in_attr->i);
4021 else
4022 _bfd_error_handler
4023 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4024 out_attr->i);
4025 }
4026
4027 /* Merge Tag_compatibility attributes and any common GNU ones. */
4028 _bfd_elf_merge_object_attributes (ibfd, obfd);
4029
4030 return TRUE;
4031 }
4032
4033 /* Merge backend specific data from an object file to the output
4034 object file when linking. */
4035
4036 static bfd_boolean
4037 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4038 {
4039 flagword old_flags;
4040 flagword new_flags;
4041 bfd_boolean error;
4042
4043 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4044 return TRUE;
4045
4046 /* Check if we have the same endianess. */
4047 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4048 return FALSE;
4049
4050 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4051 return FALSE;
4052
4053 new_flags = elf_elfheader (ibfd)->e_flags;
4054 old_flags = elf_elfheader (obfd)->e_flags;
4055 if (!elf_flags_init (obfd))
4056 {
4057 /* First call, no flags set. */
4058 elf_flags_init (obfd) = TRUE;
4059 elf_elfheader (obfd)->e_flags = new_flags;
4060 }
4061
4062 /* Compatible flags are ok. */
4063 else if (new_flags == old_flags)
4064 ;
4065
4066 /* Incompatible flags. */
4067 else
4068 {
4069 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4070 to be linked with either. */
4071 error = FALSE;
4072 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4073 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4074 {
4075 error = TRUE;
4076 (*_bfd_error_handler)
4077 (_("%B: compiled with -mrelocatable and linked with "
4078 "modules compiled normally"), ibfd);
4079 }
4080 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4081 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4082 {
4083 error = TRUE;
4084 (*_bfd_error_handler)
4085 (_("%B: compiled normally and linked with "
4086 "modules compiled with -mrelocatable"), ibfd);
4087 }
4088
4089 /* The output is -mrelocatable-lib iff both the input files are. */
4090 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4091 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4092
4093 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4094 but each input file is either -mrelocatable or -mrelocatable-lib. */
4095 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4096 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4097 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4098 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4099
4100 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4101 any module uses it. */
4102 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4103
4104 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4105 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4106
4107 /* Warn about any other mismatches. */
4108 if (new_flags != old_flags)
4109 {
4110 error = TRUE;
4111 (*_bfd_error_handler)
4112 (_("%B: uses different e_flags (0x%lx) fields "
4113 "than previous modules (0x%lx)"),
4114 ibfd, (long) new_flags, (long) old_flags);
4115 }
4116
4117 if (error)
4118 {
4119 bfd_set_error (bfd_error_bad_value);
4120 return FALSE;
4121 }
4122 }
4123
4124 return TRUE;
4125 }
4126 \f
4127 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4128 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4129 int
4130 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4131 struct bfd_link_info *info,
4132 enum ppc_elf_plt_type plt_style,
4133 int emit_stub_syms)
4134 {
4135 struct ppc_elf_link_hash_table *htab;
4136 flagword flags;
4137
4138 htab = ppc_elf_hash_table (info);
4139
4140 if (htab->plt_type == PLT_UNSET)
4141 {
4142 if (plt_style == PLT_OLD)
4143 htab->plt_type = PLT_OLD;
4144 else
4145 {
4146 bfd *ibfd;
4147 enum ppc_elf_plt_type plt_type = plt_style;
4148
4149 /* Look through the reloc flags left by ppc_elf_check_relocs.
4150 Use the old style bss plt if a file makes plt calls
4151 without using the new relocs, and if ld isn't given
4152 --secure-plt and we never see REL16 relocs. */
4153 if (plt_type == PLT_UNSET)
4154 plt_type = PLT_OLD;
4155 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4156 if (is_ppc_elf (ibfd))
4157 {
4158 if (ppc_elf_tdata (ibfd)->has_rel16)
4159 plt_type = PLT_NEW;
4160 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4161 {
4162 plt_type = PLT_OLD;
4163 htab->old_bfd = ibfd;
4164 break;
4165 }
4166 }
4167 htab->plt_type = plt_type;
4168 }
4169 }
4170 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4171 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4172
4173 htab->emit_stub_syms = emit_stub_syms;
4174
4175 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4176
4177 if (htab->plt_type == PLT_NEW)
4178 {
4179 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4180 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4181
4182 /* The new PLT is a loaded section. */
4183 if (htab->plt != NULL
4184 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4185 return -1;
4186
4187 /* The new GOT is not executable. */
4188 if (htab->got != NULL
4189 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4190 return -1;
4191 }
4192 else
4193 {
4194 /* Stop an unused .glink section from affecting .text alignment. */
4195 if (htab->glink != NULL
4196 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4197 return -1;
4198 }
4199 return htab->plt_type == PLT_NEW;
4200 }
4201 \f
4202 /* Return the section that should be marked against GC for a given
4203 relocation. */
4204
4205 static asection *
4206 ppc_elf_gc_mark_hook (asection *sec,
4207 struct bfd_link_info *info,
4208 Elf_Internal_Rela *rel,
4209 struct elf_link_hash_entry *h,
4210 Elf_Internal_Sym *sym)
4211 {
4212 if (h != NULL)
4213 switch (ELF32_R_TYPE (rel->r_info))
4214 {
4215 case R_PPC_GNU_VTINHERIT:
4216 case R_PPC_GNU_VTENTRY:
4217 return NULL;
4218 }
4219
4220 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4221 }
4222
4223 /* Update the got, plt and dynamic reloc reference counts for the
4224 section being removed. */
4225
4226 static bfd_boolean
4227 ppc_elf_gc_sweep_hook (bfd *abfd,
4228 struct bfd_link_info *info,
4229 asection *sec,
4230 const Elf_Internal_Rela *relocs)
4231 {
4232 struct ppc_elf_link_hash_table *htab;
4233 Elf_Internal_Shdr *symtab_hdr;
4234 struct elf_link_hash_entry **sym_hashes;
4235 bfd_signed_vma *local_got_refcounts;
4236 const Elf_Internal_Rela *rel, *relend;
4237 asection *got2;
4238
4239 if (info->relocatable)
4240 return TRUE;
4241
4242 if ((sec->flags & SEC_ALLOC) == 0)
4243 return TRUE;
4244
4245 elf_section_data (sec)->local_dynrel = NULL;
4246
4247 htab = ppc_elf_hash_table (info);
4248 symtab_hdr = &elf_symtab_hdr (abfd);
4249 sym_hashes = elf_sym_hashes (abfd);
4250 local_got_refcounts = elf_local_got_refcounts (abfd);
4251 got2 = bfd_get_section_by_name (abfd, ".got2");
4252
4253 relend = relocs + sec->reloc_count;
4254 for (rel = relocs; rel < relend; rel++)
4255 {
4256 unsigned long r_symndx;
4257 enum elf_ppc_reloc_type r_type;
4258 struct elf_link_hash_entry *h = NULL;
4259
4260 r_symndx = ELF32_R_SYM (rel->r_info);
4261 if (r_symndx >= symtab_hdr->sh_info)
4262 {
4263 struct ppc_elf_dyn_relocs **pp, *p;
4264 struct ppc_elf_link_hash_entry *eh;
4265
4266 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4267 while (h->root.type == bfd_link_hash_indirect
4268 || h->root.type == bfd_link_hash_warning)
4269 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4270 eh = (struct ppc_elf_link_hash_entry *) h;
4271
4272 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4273 if (p->sec == sec)
4274 {
4275 /* Everything must go for SEC. */
4276 *pp = p->next;
4277 break;
4278 }
4279 }
4280
4281 r_type = ELF32_R_TYPE (rel->r_info);
4282 switch (r_type)
4283 {
4284 case R_PPC_GOT_TLSLD16:
4285 case R_PPC_GOT_TLSLD16_LO:
4286 case R_PPC_GOT_TLSLD16_HI:
4287 case R_PPC_GOT_TLSLD16_HA:
4288 case R_PPC_GOT_TLSGD16:
4289 case R_PPC_GOT_TLSGD16_LO:
4290 case R_PPC_GOT_TLSGD16_HI:
4291 case R_PPC_GOT_TLSGD16_HA:
4292 case R_PPC_GOT_TPREL16:
4293 case R_PPC_GOT_TPREL16_LO:
4294 case R_PPC_GOT_TPREL16_HI:
4295 case R_PPC_GOT_TPREL16_HA:
4296 case R_PPC_GOT_DTPREL16:
4297 case R_PPC_GOT_DTPREL16_LO:
4298 case R_PPC_GOT_DTPREL16_HI:
4299 case R_PPC_GOT_DTPREL16_HA:
4300 case R_PPC_GOT16:
4301 case R_PPC_GOT16_LO:
4302 case R_PPC_GOT16_HI:
4303 case R_PPC_GOT16_HA:
4304 if (h != NULL)
4305 {
4306 if (h->got.refcount > 0)
4307 h->got.refcount--;
4308 }
4309 else if (local_got_refcounts != NULL)
4310 {
4311 if (local_got_refcounts[r_symndx] > 0)
4312 local_got_refcounts[r_symndx]--;
4313 }
4314 break;
4315
4316 case R_PPC_REL24:
4317 case R_PPC_REL14:
4318 case R_PPC_REL14_BRTAKEN:
4319 case R_PPC_REL14_BRNTAKEN:
4320 case R_PPC_REL32:
4321 if (h == NULL || h == htab->elf.hgot)
4322 break;
4323 /* Fall thru */
4324
4325 case R_PPC_ADDR32:
4326 case R_PPC_ADDR24:
4327 case R_PPC_ADDR16:
4328 case R_PPC_ADDR16_LO:
4329 case R_PPC_ADDR16_HI:
4330 case R_PPC_ADDR16_HA:
4331 case R_PPC_ADDR14:
4332 case R_PPC_ADDR14_BRTAKEN:
4333 case R_PPC_ADDR14_BRNTAKEN:
4334 case R_PPC_UADDR32:
4335 case R_PPC_UADDR16:
4336 if (info->shared)
4337 break;
4338
4339 case R_PPC_PLT32:
4340 case R_PPC_PLTREL24:
4341 case R_PPC_PLTREL32:
4342 case R_PPC_PLT16_LO:
4343 case R_PPC_PLT16_HI:
4344 case R_PPC_PLT16_HA:
4345 if (h != NULL)
4346 {
4347 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4348 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4349 if (ent->plt.refcount > 0)
4350 ent->plt.refcount -= 1;
4351 }
4352 break;
4353
4354 default:
4355 break;
4356 }
4357 }
4358 return TRUE;
4359 }
4360 \f
4361 /* Set plt output section type, htab->tls_get_addr, and call the
4362 generic ELF tls_setup function. */
4363
4364 asection *
4365 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4366 {
4367 struct ppc_elf_link_hash_table *htab;
4368
4369 htab = ppc_elf_hash_table (info);
4370 if (htab->plt_type == PLT_NEW
4371 && htab->plt != NULL
4372 && htab->plt->output_section != NULL)
4373 {
4374 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4375 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4376 }
4377
4378 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4379 FALSE, FALSE, TRUE);
4380 return _bfd_elf_tls_setup (obfd, info);
4381 }
4382
4383 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4384 HASH. */
4385
4386 static bfd_boolean
4387 branch_reloc_hash_match (const bfd *ibfd,
4388 const Elf_Internal_Rela *rel,
4389 const struct elf_link_hash_entry *hash)
4390 {
4391 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4392 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4393 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4394
4395 if (r_symndx >= symtab_hdr->sh_info
4396 && (r_type == R_PPC_PLTREL24
4397 || r_type == R_PPC_LOCAL24PC
4398 || r_type == R_PPC_REL14
4399 || r_type == R_PPC_REL14_BRTAKEN
4400 || r_type == R_PPC_REL14_BRNTAKEN
4401 || r_type == R_PPC_REL24
4402 || r_type == R_PPC_ADDR24
4403 || r_type == R_PPC_ADDR14
4404 || r_type == R_PPC_ADDR14_BRTAKEN
4405 || r_type == R_PPC_ADDR14_BRNTAKEN))
4406 {
4407 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4408 struct elf_link_hash_entry *h;
4409
4410 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4411 while (h->root.type == bfd_link_hash_indirect
4412 || h->root.type == bfd_link_hash_warning)
4413 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4414 if (h == hash)
4415 return TRUE;
4416 }
4417 return FALSE;
4418 }
4419
4420 /* Run through all the TLS relocs looking for optimization
4421 opportunities. */
4422
4423 bfd_boolean
4424 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4425 struct bfd_link_info *info)
4426 {
4427 bfd *ibfd;
4428 asection *sec;
4429 struct ppc_elf_link_hash_table *htab;
4430 int pass;
4431
4432 if (info->relocatable || !info->executable)
4433 return TRUE;
4434
4435 htab = ppc_elf_hash_table (info);
4436 /* Make two passes through the relocs. First time check that tls
4437 relocs involved in setting up a tls_get_addr call are indeed
4438 followed by such a call. If they are not, exclude them from
4439 the optimizations done on the second pass. */
4440 for (pass = 0; pass < 2; ++pass)
4441 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4442 {
4443 Elf_Internal_Sym *locsyms = NULL;
4444 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4445
4446 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4447 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4448 {
4449 Elf_Internal_Rela *relstart, *rel, *relend;
4450
4451 /* Read the relocations. */
4452 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4453 info->keep_memory);
4454 if (relstart == NULL)
4455 return FALSE;
4456
4457 relend = relstart + sec->reloc_count;
4458 for (rel = relstart; rel < relend; rel++)
4459 {
4460 enum elf_ppc_reloc_type r_type;
4461 unsigned long r_symndx;
4462 struct elf_link_hash_entry *h = NULL;
4463 char *tls_mask;
4464 char tls_set, tls_clear;
4465 bfd_boolean is_local;
4466 int expecting_tls_get_addr;
4467 bfd_signed_vma *got_count;
4468
4469 r_symndx = ELF32_R_SYM (rel->r_info);
4470 if (r_symndx >= symtab_hdr->sh_info)
4471 {
4472 struct elf_link_hash_entry **sym_hashes;
4473
4474 sym_hashes = elf_sym_hashes (ibfd);
4475 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4476 while (h->root.type == bfd_link_hash_indirect
4477 || h->root.type == bfd_link_hash_warning)
4478 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4479 }
4480
4481 expecting_tls_get_addr = 0;
4482 is_local = FALSE;
4483 if (h == NULL
4484 || !h->def_dynamic)
4485 is_local = TRUE;
4486
4487 r_type = ELF32_R_TYPE (rel->r_info);
4488 switch (r_type)
4489 {
4490 case R_PPC_GOT_TLSLD16:
4491 case R_PPC_GOT_TLSLD16_LO:
4492 expecting_tls_get_addr = 1;
4493 /* Fall thru */
4494
4495 case R_PPC_GOT_TLSLD16_HI:
4496 case R_PPC_GOT_TLSLD16_HA:
4497 /* These relocs should never be against a symbol
4498 defined in a shared lib. Leave them alone if
4499 that turns out to be the case. */
4500 if (!is_local)
4501 continue;
4502
4503 /* LD -> LE */
4504 tls_set = 0;
4505 tls_clear = TLS_LD;
4506 break;
4507
4508 case R_PPC_GOT_TLSGD16:
4509 case R_PPC_GOT_TLSGD16_LO:
4510 expecting_tls_get_addr = 1;
4511 /* Fall thru */
4512
4513 case R_PPC_GOT_TLSGD16_HI:
4514 case R_PPC_GOT_TLSGD16_HA:
4515 if (is_local)
4516 /* GD -> LE */
4517 tls_set = 0;
4518 else
4519 /* GD -> IE */
4520 tls_set = TLS_TLS | TLS_TPRELGD;
4521 tls_clear = TLS_GD;
4522 break;
4523
4524 case R_PPC_GOT_TPREL16:
4525 case R_PPC_GOT_TPREL16_LO:
4526 case R_PPC_GOT_TPREL16_HI:
4527 case R_PPC_GOT_TPREL16_HA:
4528 if (is_local)
4529 {
4530 /* IE -> LE */
4531 tls_set = 0;
4532 tls_clear = TLS_TPREL;
4533 break;
4534 }
4535 else
4536 continue;
4537
4538 default:
4539 continue;
4540 }
4541
4542 if (pass == 0)
4543 {
4544 if (!expecting_tls_get_addr
4545 || !sec->has_tls_get_addr_call)
4546 continue;
4547
4548 if (rel + 1 < relend
4549 && branch_reloc_hash_match (ibfd, rel + 1,
4550 htab->tls_get_addr))
4551 continue;
4552
4553 /* Uh oh, we didn't find the expected call. We
4554 could just mark this symbol to exclude it
4555 from tls optimization but it's safer to skip
4556 the entire section. */
4557 sec->has_tls_reloc = 0;
4558 break;
4559 }
4560
4561 if (h != NULL)
4562 {
4563 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4564 got_count = &h->got.refcount;
4565 }
4566 else
4567 {
4568 Elf_Internal_Sym *sym;
4569 bfd_signed_vma *lgot_refs;
4570 char *lgot_masks;
4571
4572 if (locsyms == NULL)
4573 {
4574 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4575 if (locsyms == NULL)
4576 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4577 symtab_hdr->sh_info,
4578 0, NULL, NULL, NULL);
4579 if (locsyms == NULL)
4580 {
4581 if (elf_section_data (sec)->relocs != relstart)
4582 free (relstart);
4583 return FALSE;
4584 }
4585 }
4586 sym = locsyms + r_symndx;
4587 lgot_refs = elf_local_got_refcounts (ibfd);
4588 if (lgot_refs == NULL)
4589 abort ();
4590 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4591 tls_mask = &lgot_masks[r_symndx];
4592 got_count = &lgot_refs[r_symndx];
4593 }
4594
4595 if (tls_set == 0)
4596 {
4597 /* We managed to get rid of a got entry. */
4598 if (*got_count > 0)
4599 *got_count -= 1;
4600 }
4601
4602 if (expecting_tls_get_addr)
4603 {
4604 struct plt_entry *ent;
4605
4606 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4607 if (ent != NULL && ent->plt.refcount > 0)
4608 ent->plt.refcount -= 1;
4609 }
4610
4611 *tls_mask |= tls_set;
4612 *tls_mask &= ~tls_clear;
4613 }
4614
4615 if (elf_section_data (sec)->relocs != relstart)
4616 free (relstart);
4617 }
4618
4619 if (locsyms != NULL
4620 && (symtab_hdr->contents != (unsigned char *) locsyms))
4621 {
4622 if (!info->keep_memory)
4623 free (locsyms);
4624 else
4625 symtab_hdr->contents = (unsigned char *) locsyms;
4626 }
4627 }
4628 return TRUE;
4629 }
4630 \f
4631 /* Return true if we have dynamic relocs that apply to read-only sections. */
4632
4633 static bfd_boolean
4634 readonly_dynrelocs (struct elf_link_hash_entry *h)
4635 {
4636 struct ppc_elf_dyn_relocs *p;
4637
4638 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4639 {
4640 asection *s = p->sec->output_section;
4641
4642 if (s != NULL
4643 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4644 == (SEC_READONLY | SEC_ALLOC)))
4645 return TRUE;
4646 }
4647 return FALSE;
4648 }
4649
4650 /* Adjust a symbol defined by a dynamic object and referenced by a
4651 regular object. The current definition is in some section of the
4652 dynamic object, but we're not including those sections. We have to
4653 change the definition to something the rest of the link can
4654 understand. */
4655
4656 static bfd_boolean
4657 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4658 struct elf_link_hash_entry *h)
4659 {
4660 struct ppc_elf_link_hash_table *htab;
4661 asection *s;
4662
4663 #ifdef DEBUG
4664 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4665 h->root.root.string);
4666 #endif
4667
4668 /* Make sure we know what is going on here. */
4669 htab = ppc_elf_hash_table (info);
4670 BFD_ASSERT (htab->elf.dynobj != NULL
4671 && (h->needs_plt
4672 || h->u.weakdef != NULL
4673 || (h->def_dynamic
4674 && h->ref_regular
4675 && !h->def_regular)));
4676
4677 /* Deal with function syms. */
4678 if (h->type == STT_FUNC
4679 || h->needs_plt)
4680 {
4681 /* Clear procedure linkage table information for any symbol that
4682 won't need a .plt entry. */
4683 struct plt_entry *ent;
4684 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4685 if (ent->plt.refcount > 0)
4686 break;
4687 if (ent == NULL
4688 || SYMBOL_CALLS_LOCAL (info, h)
4689 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4690 && h->root.type == bfd_link_hash_undefweak))
4691 {
4692 /* A PLT entry is not required/allowed when:
4693
4694 1. We are not using ld.so; because then the PLT entry
4695 can't be set up, so we can't use one. In this case,
4696 ppc_elf_adjust_dynamic_symbol won't even be called.
4697
4698 2. GC has rendered the entry unused.
4699
4700 3. We know for certain that a call to this symbol
4701 will go to this object, or will remain undefined. */
4702 h->plt.plist = NULL;
4703 h->needs_plt = 0;
4704 }
4705 else
4706 {
4707 /* After adjust_dynamic_symbol, non_got_ref set means that
4708 dyn_relocs for this symbol should be discarded.
4709 If we get here we know we are making a PLT entry for this
4710 symbol, and in an executable we'd normally resolve
4711 relocations against this symbol to the PLT entry. Allow
4712 dynamic relocs if the reference is weak, and the dynamic
4713 relocs will not cause text relocation. */
4714 if (!h->ref_regular_nonweak
4715 && h->non_got_ref
4716 && !htab->is_vxworks
4717 && !ppc_elf_hash_entry (h)->has_sda_refs
4718 && !readonly_dynrelocs (h))
4719 h->non_got_ref = 0;
4720 }
4721 return TRUE;
4722 }
4723 else
4724 h->plt.plist = NULL;
4725
4726 /* If this is a weak symbol, and there is a real definition, the
4727 processor independent code will have arranged for us to see the
4728 real definition first, and we can just use the same value. */
4729 if (h->u.weakdef != NULL)
4730 {
4731 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4732 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4733 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4734 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4735 if (ELIMINATE_COPY_RELOCS)
4736 h->non_got_ref = h->u.weakdef->non_got_ref;
4737 return TRUE;
4738 }
4739
4740 /* This is a reference to a symbol defined by a dynamic object which
4741 is not a function. */
4742
4743 /* If we are creating a shared library, we must presume that the
4744 only references to the symbol are via the global offset table.
4745 For such cases we need not do anything here; the relocations will
4746 be handled correctly by relocate_section. */
4747 if (info->shared)
4748 return TRUE;
4749
4750 /* If there are no references to this symbol that do not use the
4751 GOT, we don't need to generate a copy reloc. */
4752 if (!h->non_got_ref)
4753 return TRUE;
4754
4755 /* If we didn't find any dynamic relocs in read-only sections, then
4756 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4757 We can't do this if there are any small data relocations. This
4758 doesn't work on VxWorks, where we can not have dynamic
4759 relocations (other than copy and jump slot relocations) in an
4760 executable. */
4761 if (ELIMINATE_COPY_RELOCS
4762 && !ppc_elf_hash_entry (h)->has_sda_refs
4763 && !htab->is_vxworks
4764 && !h->def_regular
4765 && !readonly_dynrelocs (h))
4766 {
4767 h->non_got_ref = 0;
4768 return TRUE;
4769 }
4770
4771 if (h->size == 0)
4772 {
4773 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4774 h->root.root.string);
4775 return TRUE;
4776 }
4777
4778 /* We must allocate the symbol in our .dynbss section, which will
4779 become part of the .bss section of the executable. There will be
4780 an entry for this symbol in the .dynsym section. The dynamic
4781 object will contain position independent code, so all references
4782 from the dynamic object to this symbol will go through the global
4783 offset table. The dynamic linker will use the .dynsym entry to
4784 determine the address it must put in the global offset table, so
4785 both the dynamic object and the regular object will refer to the
4786 same memory location for the variable.
4787
4788 Of course, if the symbol is referenced using SDAREL relocs, we
4789 must instead allocate it in .sbss. */
4790
4791 if (ppc_elf_hash_entry (h)->has_sda_refs)
4792 s = htab->dynsbss;
4793 else
4794 s = htab->dynbss;
4795 BFD_ASSERT (s != NULL);
4796
4797 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4798 copy the initial value out of the dynamic object and into the
4799 runtime process image. We need to remember the offset into the
4800 .rela.bss section we are going to use. */
4801 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4802 {
4803 asection *srel;
4804
4805 if (ppc_elf_hash_entry (h)->has_sda_refs)
4806 srel = htab->relsbss;
4807 else
4808 srel = htab->relbss;
4809 BFD_ASSERT (srel != NULL);
4810 srel->size += sizeof (Elf32_External_Rela);
4811 h->needs_copy = 1;
4812 }
4813
4814 return _bfd_elf_adjust_dynamic_copy (h, s);
4815 }
4816 \f
4817 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4818 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4819 specifying the addend on the plt relocation. For -fpic code, the sym
4820 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4821 xxxxxxxx.got2.plt_pic32.<callee>. */
4822
4823 static bfd_boolean
4824 add_stub_sym (struct plt_entry *ent,
4825 struct elf_link_hash_entry *h,
4826 struct bfd_link_info *info)
4827 {
4828 struct elf_link_hash_entry *sh;
4829 size_t len1, len2, len3;
4830 char *name;
4831 const char *stub;
4832 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4833
4834 if (info->shared || info->pie)
4835 stub = ".plt_pic32.";
4836 else
4837 stub = ".plt_call32.";
4838
4839 len1 = strlen (h->root.root.string);
4840 len2 = strlen (stub);
4841 len3 = 0;
4842 if (ent->sec)
4843 len3 = strlen (ent->sec->name);
4844 name = bfd_malloc (len1 + len2 + len3 + 9);
4845 if (name == NULL)
4846 return FALSE;
4847 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4848 if (ent->sec)
4849 memcpy (name + 8, ent->sec->name, len3);
4850 memcpy (name + 8 + len3, stub, len2);
4851 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4852 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4853 if (sh == NULL)
4854 return FALSE;
4855 if (sh->root.type == bfd_link_hash_new)
4856 {
4857 sh->root.type = bfd_link_hash_defined;
4858 sh->root.u.def.section = htab->glink;
4859 sh->root.u.def.value = ent->glink_offset;
4860 sh->ref_regular = 1;
4861 sh->def_regular = 1;
4862 sh->ref_regular_nonweak = 1;
4863 sh->forced_local = 1;
4864 sh->non_elf = 0;
4865 }
4866 return TRUE;
4867 }
4868
4869 /* Allocate NEED contiguous space in .got, and return the offset.
4870 Handles allocation of the got header when crossing 32k. */
4871
4872 static bfd_vma
4873 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4874 {
4875 bfd_vma where;
4876 unsigned int max_before_header;
4877
4878 if (htab->plt_type == PLT_VXWORKS)
4879 {
4880 where = htab->got->size;
4881 htab->got->size += need;
4882 }
4883 else
4884 {
4885 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4886 if (need <= htab->got_gap)
4887 {
4888 where = max_before_header - htab->got_gap;
4889 htab->got_gap -= need;
4890 }
4891 else
4892 {
4893 if (htab->got->size + need > max_before_header
4894 && htab->got->size <= max_before_header)
4895 {
4896 htab->got_gap = max_before_header - htab->got->size;
4897 htab->got->size = max_before_header + htab->got_header_size;
4898 }
4899 where = htab->got->size;
4900 htab->got->size += need;
4901 }
4902 }
4903 return where;
4904 }
4905
4906 /* Allocate space in associated reloc sections for dynamic relocs. */
4907
4908 static bfd_boolean
4909 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4910 {
4911 struct bfd_link_info *info = inf;
4912 struct ppc_elf_link_hash_entry *eh;
4913 struct ppc_elf_link_hash_table *htab;
4914 struct ppc_elf_dyn_relocs *p;
4915
4916 if (h->root.type == bfd_link_hash_indirect)
4917 return TRUE;
4918
4919 if (h->root.type == bfd_link_hash_warning)
4920 /* When warning symbols are created, they **replace** the "real"
4921 entry in the hash table, thus we never get to see the real
4922 symbol in a hash traversal. So look at it now. */
4923 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4924
4925 htab = ppc_elf_hash_table (info);
4926 if (htab->elf.dynamic_sections_created)
4927 {
4928 struct plt_entry *ent;
4929 bfd_boolean doneone = FALSE;
4930 bfd_vma plt_offset = 0, glink_offset = 0;
4931
4932 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4933 if (ent->plt.refcount > 0)
4934 {
4935 /* Make sure this symbol is output as a dynamic symbol. */
4936 if (h->dynindx == -1
4937 && !h->forced_local)
4938 {
4939 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4940 return FALSE;
4941 }
4942
4943 if (info->shared
4944 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4945 {
4946 asection *s = htab->plt;
4947
4948 if (htab->plt_type == PLT_NEW)
4949 {
4950 if (!doneone)
4951 {
4952 plt_offset = s->size;
4953 s->size += 4;
4954 }
4955 ent->plt.offset = plt_offset;
4956
4957 s = htab->glink;
4958 if (!doneone || info->shared || info->pie)
4959 {
4960 glink_offset = s->size;
4961 s->size += GLINK_ENTRY_SIZE;
4962 }
4963 if (!doneone
4964 && !info->shared
4965 && h->def_dynamic
4966 && !h->def_regular)
4967 {
4968 h->root.u.def.section = s;
4969 h->root.u.def.value = glink_offset;
4970 }
4971 ent->glink_offset = glink_offset;
4972
4973 if (htab->emit_stub_syms
4974 && !add_stub_sym (ent, h, info))
4975 return FALSE;
4976 }
4977 else
4978 {
4979 if (!doneone)
4980 {
4981 /* If this is the first .plt entry, make room
4982 for the special first entry. */
4983 if (s->size == 0)
4984 s->size += htab->plt_initial_entry_size;
4985
4986 /* The PowerPC PLT is actually composed of two
4987 parts, the first part is 2 words (for a load
4988 and a jump), and then there is a remaining
4989 word available at the end. */
4990 plt_offset = (htab->plt_initial_entry_size
4991 + (htab->plt_slot_size
4992 * ((s->size
4993 - htab->plt_initial_entry_size)
4994 / htab->plt_entry_size)));
4995
4996 /* If this symbol is not defined in a regular
4997 file, and we are not generating a shared
4998 library, then set the symbol to this location
4999 in the .plt. This is required to make
5000 function pointers compare as equal between
5001 the normal executable and the shared library. */
5002 if (! info->shared
5003 && h->def_dynamic
5004 && !h->def_regular)
5005 {
5006 h->root.u.def.section = s;
5007 h->root.u.def.value = plt_offset;
5008 }
5009
5010 /* Make room for this entry. */
5011 s->size += htab->plt_entry_size;
5012 /* After the 8192nd entry, room for two entries
5013 is allocated. */
5014 if (htab->plt_type == PLT_OLD
5015 && (s->size - htab->plt_initial_entry_size)
5016 / htab->plt_entry_size
5017 > PLT_NUM_SINGLE_ENTRIES)
5018 s->size += htab->plt_entry_size;
5019 }
5020 ent->plt.offset = plt_offset;
5021 }
5022
5023 /* We also need to make an entry in the .rela.plt section. */
5024 if (!doneone)
5025 {
5026 htab->relplt->size += sizeof (Elf32_External_Rela);
5027
5028 if (htab->plt_type == PLT_VXWORKS)
5029 {
5030 /* Allocate space for the unloaded relocations. */
5031 if (!info->shared)
5032 {
5033 if (ent->plt.offset
5034 == (bfd_vma) htab->plt_initial_entry_size)
5035 {
5036 htab->srelplt2->size
5037 += sizeof (Elf32_External_Rela)
5038 * VXWORKS_PLTRESOLVE_RELOCS;
5039 }
5040
5041 htab->srelplt2->size
5042 += sizeof (Elf32_External_Rela)
5043 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
5044 }
5045
5046 /* Every PLT entry has an associated GOT entry in
5047 .got.plt. */
5048 htab->sgotplt->size += 4;
5049 }
5050 doneone = TRUE;
5051 }
5052 }
5053 else
5054 ent->plt.offset = (bfd_vma) -1;
5055 }
5056 else
5057 ent->plt.offset = (bfd_vma) -1;
5058
5059 if (!doneone)
5060 {
5061 h->plt.plist = NULL;
5062 h->needs_plt = 0;
5063 }
5064 }
5065 else
5066 {
5067 h->plt.plist = NULL;
5068 h->needs_plt = 0;
5069 }
5070
5071 eh = (struct ppc_elf_link_hash_entry *) h;
5072 if (eh->elf.got.refcount > 0)
5073 {
5074 bfd_boolean dyn;
5075 unsigned int need;
5076
5077 /* Make sure this symbol is output as a dynamic symbol. */
5078 if (eh->elf.dynindx == -1
5079 && !eh->elf.forced_local
5080 && htab->elf.dynamic_sections_created)
5081 {
5082 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5083 return FALSE;
5084 }
5085
5086 need = 0;
5087 if ((eh->tls_mask & TLS_TLS) != 0)
5088 {
5089 if ((eh->tls_mask & TLS_LD) != 0)
5090 {
5091 if (!eh->elf.def_dynamic)
5092 /* We'll just use htab->tlsld_got.offset. This should
5093 always be the case. It's a little odd if we have
5094 a local dynamic reloc against a non-local symbol. */
5095 htab->tlsld_got.refcount += 1;
5096 else
5097 need += 8;
5098 }
5099 if ((eh->tls_mask & TLS_GD) != 0)
5100 need += 8;
5101 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5102 need += 4;
5103 if ((eh->tls_mask & TLS_DTPREL) != 0)
5104 need += 4;
5105 }
5106 else
5107 need += 4;
5108 if (need == 0)
5109 eh->elf.got.offset = (bfd_vma) -1;
5110 else
5111 {
5112 eh->elf.got.offset = allocate_got (htab, need);
5113 dyn = htab->elf.dynamic_sections_created;
5114 if ((info->shared
5115 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5116 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5117 || eh->elf.root.type != bfd_link_hash_undefweak))
5118 {
5119 /* All the entries we allocated need relocs.
5120 Except LD only needs one. */
5121 if ((eh->tls_mask & TLS_LD) != 0
5122 && eh->elf.def_dynamic)
5123 need -= 4;
5124 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
5125 }
5126 }
5127 }
5128 else
5129 eh->elf.got.offset = (bfd_vma) -1;
5130
5131 if (eh->dyn_relocs == NULL
5132 || !htab->elf.dynamic_sections_created)
5133 return TRUE;
5134
5135 /* In the shared -Bsymbolic case, discard space allocated for
5136 dynamic pc-relative relocs against symbols which turn out to be
5137 defined in regular objects. For the normal shared case, discard
5138 space for relocs that have become local due to symbol visibility
5139 changes. */
5140
5141 if (info->shared)
5142 {
5143 /* Relocs that use pc_count are those that appear on a call insn,
5144 or certain REL relocs (see must_be_dyn_reloc) that can be
5145 generated via assembly. We want calls to protected symbols to
5146 resolve directly to the function rather than going via the plt.
5147 If people want function pointer comparisons to work as expected
5148 then they should avoid writing weird assembly. */
5149 if (SYMBOL_CALLS_LOCAL (info, h))
5150 {
5151 struct ppc_elf_dyn_relocs **pp;
5152
5153 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5154 {
5155 p->count -= p->pc_count;
5156 p->pc_count = 0;
5157 if (p->count == 0)
5158 *pp = p->next;
5159 else
5160 pp = &p->next;
5161 }
5162 }
5163
5164 if (htab->is_vxworks)
5165 {
5166 struct ppc_elf_dyn_relocs **pp;
5167
5168 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5169 {
5170 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5171 *pp = p->next;
5172 else
5173 pp = &p->next;
5174 }
5175 }
5176
5177 /* Discard relocs on undefined symbols that must be local. */
5178 if (eh->dyn_relocs != NULL
5179 && h->root.type == bfd_link_hash_undefined
5180 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5181 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5182 eh->dyn_relocs = NULL;
5183
5184 /* Also discard relocs on undefined weak syms with non-default
5185 visibility. */
5186 if (eh->dyn_relocs != NULL
5187 && h->root.type == bfd_link_hash_undefweak)
5188 {
5189 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5190 eh->dyn_relocs = NULL;
5191
5192 /* Make sure undefined weak symbols are output as a dynamic
5193 symbol in PIEs. */
5194 else if (h->dynindx == -1
5195 && !h->forced_local)
5196 {
5197 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5198 return FALSE;
5199 }
5200 }
5201 }
5202 else if (ELIMINATE_COPY_RELOCS)
5203 {
5204 /* For the non-shared case, discard space for relocs against
5205 symbols which turn out to need copy relocs or are not
5206 dynamic. */
5207
5208 if (!h->non_got_ref
5209 && !h->def_regular)
5210 {
5211 /* Make sure this symbol is output as a dynamic symbol.
5212 Undefined weak syms won't yet be marked as dynamic. */
5213 if (h->dynindx == -1
5214 && !h->forced_local)
5215 {
5216 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5217 return FALSE;
5218 }
5219
5220 /* If that succeeded, we know we'll be keeping all the
5221 relocs. */
5222 if (h->dynindx != -1)
5223 goto keep;
5224 }
5225
5226 eh->dyn_relocs = NULL;
5227
5228 keep: ;
5229 }
5230
5231 /* Finally, allocate space. */
5232 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5233 {
5234 asection *sreloc = elf_section_data (p->sec)->sreloc;
5235 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5236 }
5237
5238 return TRUE;
5239 }
5240
5241 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5242 read-only sections. */
5243
5244 static bfd_boolean
5245 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5246 {
5247 if (h->root.type == bfd_link_hash_indirect)
5248 return TRUE;
5249
5250 if (h->root.type == bfd_link_hash_warning)
5251 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5252
5253 if (readonly_dynrelocs (h))
5254 {
5255 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5256
5257 /* Not an error, just cut short the traversal. */
5258 return FALSE;
5259 }
5260 return TRUE;
5261 }
5262
5263 /* Set the sizes of the dynamic sections. */
5264
5265 static bfd_boolean
5266 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5267 struct bfd_link_info *info)
5268 {
5269 struct ppc_elf_link_hash_table *htab;
5270 asection *s;
5271 bfd_boolean relocs;
5272 bfd *ibfd;
5273
5274 #ifdef DEBUG
5275 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5276 #endif
5277
5278 htab = ppc_elf_hash_table (info);
5279 BFD_ASSERT (htab->elf.dynobj != NULL);
5280
5281 if (elf_hash_table (info)->dynamic_sections_created)
5282 {
5283 /* Set the contents of the .interp section to the interpreter. */
5284 if (info->executable)
5285 {
5286 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5287 BFD_ASSERT (s != NULL);
5288 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5289 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5290 }
5291 }
5292
5293 if (htab->plt_type == PLT_OLD)
5294 htab->got_header_size = 16;
5295 else if (htab->plt_type == PLT_NEW)
5296 htab->got_header_size = 12;
5297
5298 /* Set up .got offsets for local syms, and space for local dynamic
5299 relocs. */
5300 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5301 {
5302 bfd_signed_vma *local_got;
5303 bfd_signed_vma *end_local_got;
5304 char *lgot_masks;
5305 bfd_size_type locsymcount;
5306 Elf_Internal_Shdr *symtab_hdr;
5307
5308 if (!is_ppc_elf (ibfd))
5309 continue;
5310
5311 for (s = ibfd->sections; s != NULL; s = s->next)
5312 {
5313 struct ppc_elf_dyn_relocs *p;
5314
5315 for (p = ((struct ppc_elf_dyn_relocs *)
5316 elf_section_data (s)->local_dynrel);
5317 p != NULL;
5318 p = p->next)
5319 {
5320 if (!bfd_is_abs_section (p->sec)
5321 && bfd_is_abs_section (p->sec->output_section))
5322 {
5323 /* Input section has been discarded, either because
5324 it is a copy of a linkonce section or due to
5325 linker script /DISCARD/, so we'll be discarding
5326 the relocs too. */
5327 }
5328 else if (htab->is_vxworks
5329 && strcmp (p->sec->output_section->name,
5330 ".tls_vars") == 0)
5331 {
5332 /* Relocations in vxworks .tls_vars sections are
5333 handled specially by the loader. */
5334 }
5335 else if (p->count != 0)
5336 {
5337 elf_section_data (p->sec)->sreloc->size
5338 += p->count * sizeof (Elf32_External_Rela);
5339 if ((p->sec->output_section->flags
5340 & (SEC_READONLY | SEC_ALLOC))
5341 == (SEC_READONLY | SEC_ALLOC))
5342 info->flags |= DF_TEXTREL;
5343 }
5344 }
5345 }
5346
5347 local_got = elf_local_got_refcounts (ibfd);
5348 if (!local_got)
5349 continue;
5350
5351 symtab_hdr = &elf_symtab_hdr (ibfd);
5352 locsymcount = symtab_hdr->sh_info;
5353 end_local_got = local_got + locsymcount;
5354 lgot_masks = (char *) end_local_got;
5355 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5356 if (*local_got > 0)
5357 {
5358 unsigned int need = 0;
5359 if ((*lgot_masks & TLS_TLS) != 0)
5360 {
5361 if ((*lgot_masks & TLS_GD) != 0)
5362 need += 8;
5363 if ((*lgot_masks & TLS_LD) != 0)
5364 htab->tlsld_got.refcount += 1;
5365 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5366 need += 4;
5367 if ((*lgot_masks & TLS_DTPREL) != 0)
5368 need += 4;
5369 }
5370 else
5371 need += 4;
5372 if (need == 0)
5373 *local_got = (bfd_vma) -1;
5374 else
5375 {
5376 *local_got = allocate_got (htab, need);
5377 if (info->shared)
5378 htab->relgot->size += (need
5379 * (sizeof (Elf32_External_Rela) / 4));
5380 }
5381 }
5382 else
5383 *local_got = (bfd_vma) -1;
5384 }
5385
5386 /* Allocate space for global sym dynamic relocs. */
5387 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5388
5389 if (htab->tlsld_got.refcount > 0)
5390 {
5391 htab->tlsld_got.offset = allocate_got (htab, 8);
5392 if (info->shared)
5393 htab->relgot->size += sizeof (Elf32_External_Rela);
5394 }
5395 else
5396 htab->tlsld_got.offset = (bfd_vma) -1;
5397
5398 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5399 {
5400 unsigned int g_o_t = 32768;
5401
5402 /* If we haven't allocated the header, do so now. When we get here,
5403 for old plt/got the got size will be 0 to 32764 (not allocated),
5404 or 32780 to 65536 (header allocated). For new plt/got, the
5405 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5406 if (htab->got->size <= 32768)
5407 {
5408 g_o_t = htab->got->size;
5409 if (htab->plt_type == PLT_OLD)
5410 g_o_t += 4;
5411 htab->got->size += htab->got_header_size;
5412 }
5413
5414 htab->elf.hgot->root.u.def.value = g_o_t;
5415 }
5416
5417 if (htab->glink != NULL && htab->glink->size != 0)
5418 {
5419 htab->glink_pltresolve = htab->glink->size;
5420 /* Space for the branch table. */
5421 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5422 /* Pad out to align the start of PLTresolve. */
5423 htab->glink->size += -htab->glink->size & 15;
5424 htab->glink->size += GLINK_PLTRESOLVE;
5425
5426 if (htab->emit_stub_syms)
5427 {
5428 struct elf_link_hash_entry *sh;
5429 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5430 TRUE, FALSE, FALSE);
5431 if (sh == NULL)
5432 return FALSE;
5433 if (sh->root.type == bfd_link_hash_new)
5434 {
5435 sh->root.type = bfd_link_hash_defined;
5436 sh->root.u.def.section = htab->glink;
5437 sh->root.u.def.value = htab->glink_pltresolve;
5438 sh->ref_regular = 1;
5439 sh->def_regular = 1;
5440 sh->ref_regular_nonweak = 1;
5441 sh->forced_local = 1;
5442 sh->non_elf = 0;
5443 }
5444 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5445 TRUE, FALSE, FALSE);
5446 if (sh == NULL)
5447 return FALSE;
5448 if (sh->root.type == bfd_link_hash_new)
5449 {
5450 sh->root.type = bfd_link_hash_defined;
5451 sh->root.u.def.section = htab->glink;
5452 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5453 sh->ref_regular = 1;
5454 sh->def_regular = 1;
5455 sh->ref_regular_nonweak = 1;
5456 sh->forced_local = 1;
5457 sh->non_elf = 0;
5458 }
5459 }
5460 }
5461
5462 /* We've now determined the sizes of the various dynamic sections.
5463 Allocate memory for them. */
5464 relocs = FALSE;
5465 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5466 {
5467 bfd_boolean strip_section = TRUE;
5468
5469 if ((s->flags & SEC_LINKER_CREATED) == 0)
5470 continue;
5471
5472 if (s == htab->plt
5473 || s == htab->glink
5474 || s == htab->got
5475 || s == htab->sgotplt
5476 || s == htab->sbss
5477 || s == htab->dynbss
5478 || s == htab->dynsbss)
5479 {
5480 /* We'd like to strip these sections if they aren't needed, but if
5481 we've exported dynamic symbols from them we must leave them.
5482 It's too late to tell BFD to get rid of the symbols. */
5483 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5484 strip_section = FALSE;
5485 /* Strip this section if we don't need it; see the
5486 comment below. */
5487 }
5488 else if (s == htab->sdata[0].section
5489 || s == htab->sdata[1].section)
5490 {
5491 /* Strip these too. */
5492 }
5493 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5494 {
5495 if (s->size != 0)
5496 {
5497 /* Remember whether there are any relocation sections. */
5498 relocs = TRUE;
5499
5500 /* We use the reloc_count field as a counter if we need
5501 to copy relocs into the output file. */
5502 s->reloc_count = 0;
5503 }
5504 }
5505 else
5506 {
5507 /* It's not one of our sections, so don't allocate space. */
5508 continue;
5509 }
5510
5511 if (s->size == 0 && strip_section)
5512 {
5513 /* If we don't need this section, strip it from the
5514 output file. This is mostly to handle .rela.bss and
5515 .rela.plt. We must create both sections in
5516 create_dynamic_sections, because they must be created
5517 before the linker maps input sections to output
5518 sections. The linker does that before
5519 adjust_dynamic_symbol is called, and it is that
5520 function which decides whether anything needs to go
5521 into these sections. */
5522 s->flags |= SEC_EXCLUDE;
5523 continue;
5524 }
5525
5526 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5527 continue;
5528
5529 /* Allocate memory for the section contents. */
5530 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5531 if (s->contents == NULL)
5532 return FALSE;
5533 }
5534
5535 if (htab->elf.dynamic_sections_created)
5536 {
5537 /* Add some entries to the .dynamic section. We fill in the
5538 values later, in ppc_elf_finish_dynamic_sections, but we
5539 must add the entries now so that we get the correct size for
5540 the .dynamic section. The DT_DEBUG entry is filled in by the
5541 dynamic linker and used by the debugger. */
5542 #define add_dynamic_entry(TAG, VAL) \
5543 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5544
5545 if (info->executable)
5546 {
5547 if (!add_dynamic_entry (DT_DEBUG, 0))
5548 return FALSE;
5549 }
5550
5551 if (htab->plt != NULL && htab->plt->size != 0)
5552 {
5553 if (!add_dynamic_entry (DT_PLTGOT, 0)
5554 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5555 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5556 || !add_dynamic_entry (DT_JMPREL, 0))
5557 return FALSE;
5558 }
5559
5560 if (htab->glink != NULL && htab->glink->size != 0)
5561 {
5562 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5563 return FALSE;
5564 }
5565
5566 if (relocs)
5567 {
5568 if (!add_dynamic_entry (DT_RELA, 0)
5569 || !add_dynamic_entry (DT_RELASZ, 0)
5570 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5571 return FALSE;
5572 }
5573
5574 /* If any dynamic relocs apply to a read-only section, then we
5575 need a DT_TEXTREL entry. */
5576 if ((info->flags & DF_TEXTREL) == 0)
5577 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5578 info);
5579
5580 if ((info->flags & DF_TEXTREL) != 0)
5581 {
5582 if (!add_dynamic_entry (DT_TEXTREL, 0))
5583 return FALSE;
5584 }
5585 if (htab->is_vxworks
5586 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5587 return FALSE;
5588 }
5589 #undef add_dynamic_entry
5590
5591 return TRUE;
5592 }
5593
5594 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5595
5596 static bfd_boolean
5597 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5598 {
5599 if (h->plt.plist != NULL
5600 && !h->def_regular
5601 && (!h->pointer_equality_needed
5602 || !h->ref_regular_nonweak))
5603 return FALSE;
5604
5605 return _bfd_elf_hash_symbol (h);
5606 }
5607 \f
5608 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5609
5610 static const int shared_stub_entry[] =
5611 {
5612 0x7c0802a6, /* mflr 0 */
5613 0x429f0005, /* bcl 20, 31, .Lxxx */
5614 0x7d6802a6, /* mflr 11 */
5615 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5616 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5617 0x7c0803a6, /* mtlr 0 */
5618 0x7d6903a6, /* mtctr 11 */
5619 0x4e800420, /* bctr */
5620 };
5621
5622 static const int stub_entry[] =
5623 {
5624 0x3d600000, /* lis 11,xxx@ha */
5625 0x396b0000, /* addi 11,11,xxx@l */
5626 0x7d6903a6, /* mtctr 11 */
5627 0x4e800420, /* bctr */
5628 };
5629
5630 static bfd_boolean
5631 ppc_elf_relax_section (bfd *abfd,
5632 asection *isec,
5633 struct bfd_link_info *link_info,
5634 bfd_boolean *again)
5635 {
5636 struct one_fixup
5637 {
5638 struct one_fixup *next;
5639 asection *tsec;
5640 bfd_vma toff;
5641 bfd_vma trampoff;
5642 };
5643
5644 Elf_Internal_Shdr *symtab_hdr;
5645 bfd_byte *contents = NULL;
5646 Elf_Internal_Sym *isymbuf = NULL;
5647 Elf_Internal_Rela *internal_relocs = NULL;
5648 Elf_Internal_Rela *irel, *irelend;
5649 struct one_fixup *fixups = NULL;
5650 unsigned changes = 0;
5651 struct ppc_elf_link_hash_table *htab;
5652 bfd_size_type trampoff;
5653 asection *got2;
5654
5655 *again = FALSE;
5656
5657 /* Nothing to do if there are no relocations, and no need to do
5658 anything with non-alloc sections. */
5659 if ((isec->flags & SEC_ALLOC) == 0
5660 || (isec->flags & SEC_RELOC) == 0
5661 || isec->reloc_count == 0)
5662 return TRUE;
5663
5664 /* We cannot represent the required PIC relocs in the output, so don't
5665 do anything. The linker doesn't support mixing -shared and -r
5666 anyway. */
5667 if (link_info->relocatable && link_info->shared)
5668 return TRUE;
5669
5670 trampoff = (isec->size + 3) & (bfd_vma) -4;
5671 /* Space for a branch around any trampolines. */
5672 trampoff += 4;
5673
5674 symtab_hdr = &elf_symtab_hdr (abfd);
5675
5676 /* Get a copy of the native relocations. */
5677 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5678 link_info->keep_memory);
5679 if (internal_relocs == NULL)
5680 goto error_return;
5681
5682 htab = ppc_elf_hash_table (link_info);
5683 got2 = bfd_get_section_by_name (abfd, ".got2");
5684
5685 irelend = internal_relocs + isec->reloc_count;
5686 for (irel = internal_relocs; irel < irelend; irel++)
5687 {
5688 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5689 bfd_vma symaddr, reladdr, toff, roff;
5690 asection *tsec;
5691 struct one_fixup *f;
5692 size_t insn_offset = 0;
5693 bfd_vma max_branch_offset, val;
5694 bfd_byte *hit_addr;
5695 unsigned long t0;
5696 unsigned char sym_type;
5697
5698 switch (r_type)
5699 {
5700 case R_PPC_REL24:
5701 case R_PPC_LOCAL24PC:
5702 case R_PPC_PLTREL24:
5703 max_branch_offset = 1 << 25;
5704 break;
5705
5706 case R_PPC_REL14:
5707 case R_PPC_REL14_BRTAKEN:
5708 case R_PPC_REL14_BRNTAKEN:
5709 max_branch_offset = 1 << 15;
5710 break;
5711
5712 default:
5713 continue;
5714 }
5715
5716 /* Get the value of the symbol referred to by the reloc. */
5717 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5718 {
5719 /* A local symbol. */
5720 Elf_Internal_Sym *isym;
5721
5722 /* Read this BFD's local symbols. */
5723 if (isymbuf == NULL)
5724 {
5725 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5726 if (isymbuf == NULL)
5727 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5728 symtab_hdr->sh_info, 0,
5729 NULL, NULL, NULL);
5730 if (isymbuf == 0)
5731 goto error_return;
5732 }
5733 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5734 if (isym->st_shndx == SHN_UNDEF)
5735 tsec = bfd_und_section_ptr;
5736 else if (isym->st_shndx == SHN_ABS)
5737 tsec = bfd_abs_section_ptr;
5738 else if (isym->st_shndx == SHN_COMMON)
5739 tsec = bfd_com_section_ptr;
5740 else
5741 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5742
5743 toff = isym->st_value;
5744 sym_type = ELF_ST_TYPE (isym->st_info);
5745 }
5746 else
5747 {
5748 /* Global symbol handling. */
5749 unsigned long indx;
5750 struct elf_link_hash_entry *h;
5751
5752 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5753 h = elf_sym_hashes (abfd)[indx];
5754
5755 while (h->root.type == bfd_link_hash_indirect
5756 || h->root.type == bfd_link_hash_warning)
5757 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5758
5759 tsec = NULL;
5760 toff = 0;
5761 if (r_type == R_PPC_PLTREL24
5762 && htab->plt != NULL)
5763 {
5764 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5765
5766 if (ent != NULL)
5767 {
5768 if (htab->plt_type == PLT_NEW)
5769 {
5770 tsec = htab->glink;
5771 toff = ent->glink_offset;
5772 }
5773 else
5774 {
5775 tsec = htab->plt;
5776 toff = ent->plt.offset;
5777 }
5778 }
5779 }
5780 if (tsec != NULL)
5781 ;
5782 else if (h->root.type == bfd_link_hash_defined
5783 || h->root.type == bfd_link_hash_defweak)
5784 {
5785 tsec = h->root.u.def.section;
5786 toff = h->root.u.def.value;
5787 }
5788 else if (h->root.type == bfd_link_hash_undefined
5789 || h->root.type == bfd_link_hash_undefweak)
5790 {
5791 tsec = bfd_und_section_ptr;
5792 toff = 0;
5793 }
5794 else
5795 continue;
5796
5797 sym_type = h->type;
5798 }
5799
5800 /* If the branch and target are in the same section, you have
5801 no hope of adding stubs. We'll error out later should the
5802 branch overflow. */
5803 if (tsec == isec)
5804 continue;
5805
5806 /* There probably isn't any reason to handle symbols in
5807 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5808 attribute for a code section, and we are only looking at
5809 branches. However, implement it correctly here as a
5810 reference for other target relax_section functions. */
5811 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5812 {
5813 /* At this stage in linking, no SEC_MERGE symbol has been
5814 adjusted, so all references to such symbols need to be
5815 passed through _bfd_merged_section_offset. (Later, in
5816 relocate_section, all SEC_MERGE symbols *except* for
5817 section symbols have been adjusted.)
5818
5819 gas may reduce relocations against symbols in SEC_MERGE
5820 sections to a relocation against the section symbol when
5821 the original addend was zero. When the reloc is against
5822 a section symbol we should include the addend in the
5823 offset passed to _bfd_merged_section_offset, since the
5824 location of interest is the original symbol. On the
5825 other hand, an access to "sym+addend" where "sym" is not
5826 a section symbol should not include the addend; Such an
5827 access is presumed to be an offset from "sym"; The
5828 location of interest is just "sym". */
5829 if (sym_type == STT_SECTION)
5830 toff += irel->r_addend;
5831
5832 toff = _bfd_merged_section_offset (abfd, &tsec,
5833 elf_section_data (tsec)->sec_info,
5834 toff);
5835
5836 if (sym_type != STT_SECTION)
5837 toff += irel->r_addend;
5838 }
5839 /* PLTREL24 addends are special. */
5840 else if (r_type != R_PPC_PLTREL24)
5841 toff += irel->r_addend;
5842
5843 /* Attempted -shared link of non-pic code loses. */
5844 if (tsec->output_section == NULL)
5845 continue;
5846
5847 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5848
5849 roff = irel->r_offset;
5850 reladdr = isec->output_section->vma + isec->output_offset + roff;
5851
5852 /* If the branch is in range, no need to do anything. */
5853 if (tsec != bfd_und_section_ptr
5854 && (!link_info->relocatable
5855 /* A relocatable link may have sections moved during
5856 final link, so do not presume they remain in range. */
5857 || tsec->output_section == isec->output_section)
5858 && symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5859 continue;
5860
5861 /* Look for an existing fixup to this address. */
5862 for (f = fixups; f ; f = f->next)
5863 if (f->tsec == tsec && f->toff == toff)
5864 break;
5865
5866 if (f == NULL)
5867 {
5868 size_t size;
5869 unsigned long stub_rtype;
5870
5871 val = trampoff - roff;
5872 if (val >= max_branch_offset)
5873 /* Oh dear, we can't reach a trampoline. Don't try to add
5874 one. We'll report an error later. */
5875 continue;
5876
5877 if (link_info->shared)
5878 {
5879 size = 4 * ARRAY_SIZE (shared_stub_entry);
5880 insn_offset = 12;
5881 stub_rtype = R_PPC_RELAX32PC;
5882 }
5883 else
5884 {
5885 size = 4 * ARRAY_SIZE (stub_entry);
5886 insn_offset = 0;
5887 stub_rtype = R_PPC_RELAX32;
5888 }
5889
5890 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5891 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5892 abort ();
5893 if (tsec == htab->plt
5894 || tsec == htab->glink)
5895 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5896
5897 /* Hijack the old relocation. Since we need two
5898 relocations for this use a "composite" reloc. */
5899 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5900 stub_rtype);
5901 irel->r_offset = trampoff + insn_offset;
5902 if (r_type == R_PPC_PLTREL24)
5903 irel->r_addend = 0;
5904
5905 /* Record the fixup so we don't do it again this section. */
5906 f = bfd_malloc (sizeof (*f));
5907 f->next = fixups;
5908 f->tsec = tsec;
5909 f->toff = toff;
5910 f->trampoff = trampoff;
5911 fixups = f;
5912
5913 trampoff += size;
5914 changes++;
5915 }
5916 else
5917 {
5918 val = f->trampoff - roff;
5919 if (val >= max_branch_offset)
5920 continue;
5921
5922 /* Nop out the reloc, since we're finalizing things here. */
5923 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5924 }
5925
5926 /* Get the section contents. */
5927 if (contents == NULL)
5928 {
5929 /* Get cached copy if it exists. */
5930 if (elf_section_data (isec)->this_hdr.contents != NULL)
5931 contents = elf_section_data (isec)->this_hdr.contents;
5932 else
5933 {
5934 /* Go get them off disk. */
5935 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5936 goto error_return;
5937 }
5938 }
5939
5940 /* Fix up the existing branch to hit the trampoline. */
5941 hit_addr = contents + roff;
5942 switch (r_type)
5943 {
5944 case R_PPC_REL24:
5945 case R_PPC_LOCAL24PC:
5946 case R_PPC_PLTREL24:
5947 t0 = bfd_get_32 (abfd, hit_addr);
5948 t0 &= ~0x3fffffc;
5949 t0 |= val & 0x3fffffc;
5950 bfd_put_32 (abfd, t0, hit_addr);
5951 break;
5952
5953 case R_PPC_REL14:
5954 case R_PPC_REL14_BRTAKEN:
5955 case R_PPC_REL14_BRNTAKEN:
5956 t0 = bfd_get_32 (abfd, hit_addr);
5957 t0 &= ~0xfffc;
5958 t0 |= val & 0xfffc;
5959 bfd_put_32 (abfd, t0, hit_addr);
5960 break;
5961 }
5962 }
5963
5964 /* Write out the trampolines. */
5965 if (fixups != NULL)
5966 {
5967 const int *stub;
5968 bfd_byte *dest;
5969 bfd_vma val;
5970 int i, size;
5971
5972 do
5973 {
5974 struct one_fixup *f = fixups;
5975 fixups = fixups->next;
5976 free (f);
5977 }
5978 while (fixups);
5979
5980 contents = bfd_realloc_or_free (contents, trampoff);
5981 if (contents == NULL)
5982 goto error_return;
5983
5984 isec->size = (isec->size + 3) & (bfd_vma) -4;
5985 /* Branch around the trampolines. */
5986 val = B + trampoff - isec->size;
5987 dest = contents + isec->size;
5988 isec->size = trampoff;
5989 bfd_put_32 (abfd, val, dest);
5990 dest += 4;
5991
5992 if (link_info->shared)
5993 {
5994 stub = shared_stub_entry;
5995 size = ARRAY_SIZE (shared_stub_entry);
5996 }
5997 else
5998 {
5999 stub = stub_entry;
6000 size = ARRAY_SIZE (stub_entry);
6001 }
6002
6003 i = 0;
6004 while (dest < contents + trampoff)
6005 {
6006 bfd_put_32 (abfd, stub[i], dest);
6007 i++;
6008 if (i == size)
6009 i = 0;
6010 dest += 4;
6011 }
6012 BFD_ASSERT (i == 0);
6013 }
6014
6015 if (isymbuf != NULL
6016 && symtab_hdr->contents != (unsigned char *) isymbuf)
6017 {
6018 if (! link_info->keep_memory)
6019 free (isymbuf);
6020 else
6021 {
6022 /* Cache the symbols for elf_link_input_bfd. */
6023 symtab_hdr->contents = (unsigned char *) isymbuf;
6024 }
6025 }
6026
6027 if (contents != NULL
6028 && elf_section_data (isec)->this_hdr.contents != contents)
6029 {
6030 if (!changes && !link_info->keep_memory)
6031 free (contents);
6032 else
6033 {
6034 /* Cache the section contents for elf_link_input_bfd. */
6035 elf_section_data (isec)->this_hdr.contents = contents;
6036 }
6037 }
6038
6039 if (changes != 0)
6040 {
6041 /* Append sufficient NOP relocs so we can write out relocation
6042 information for the trampolines. */
6043 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6044 * sizeof (*new_relocs));
6045 unsigned ix;
6046
6047 if (!new_relocs)
6048 goto error_return;
6049 memcpy (new_relocs, internal_relocs,
6050 isec->reloc_count * sizeof (*new_relocs));
6051 for (ix = changes; ix--;)
6052 {
6053 irel = new_relocs + ix + isec->reloc_count;
6054
6055 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6056 }
6057 if (internal_relocs != elf_section_data (isec)->relocs)
6058 free (internal_relocs);
6059 elf_section_data (isec)->relocs = new_relocs;
6060 isec->reloc_count += changes;
6061 elf_section_data (isec)->rel_hdr.sh_size
6062 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
6063 }
6064 else if (elf_section_data (isec)->relocs != internal_relocs)
6065 free (internal_relocs);
6066
6067 *again = changes != 0;
6068 if (!*again && link_info->relocatable)
6069 {
6070 /* Convert the internal relax relocs to external form. */
6071 for (irel = internal_relocs; irel < irelend; irel++)
6072 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX32)
6073 {
6074 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6075
6076 /* Rewrite the reloc and convert one of the trailing nop
6077 relocs to describe this relocation. */
6078 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6079 /* The relocs are at the bottom 2 bytes */
6080 irel[0].r_offset += 2;
6081 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6082 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6083 irel[1].r_offset += 4;
6084 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6085 irel++;
6086 }
6087 }
6088
6089 return TRUE;
6090
6091 error_return:
6092 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6093 free (isymbuf);
6094 if (contents != NULL
6095 && elf_section_data (isec)->this_hdr.contents != contents)
6096 free (contents);
6097 if (internal_relocs != NULL
6098 && elf_section_data (isec)->relocs != internal_relocs)
6099 free (internal_relocs);
6100 return FALSE;
6101 }
6102 \f
6103 /* What to do when ld finds relocations against symbols defined in
6104 discarded sections. */
6105
6106 static unsigned int
6107 ppc_elf_action_discarded (asection *sec)
6108 {
6109 if (strcmp (".fixup", sec->name) == 0)
6110 return 0;
6111
6112 if (strcmp (".got2", sec->name) == 0)
6113 return 0;
6114
6115 return _bfd_elf_default_action_discarded (sec);
6116 }
6117 \f
6118 /* Fill in the address for a pointer generated in a linker section. */
6119
6120 static bfd_vma
6121 elf_finish_pointer_linker_section (bfd *input_bfd,
6122 elf_linker_section_t *lsect,
6123 struct elf_link_hash_entry *h,
6124 bfd_vma relocation,
6125 const Elf_Internal_Rela *rel)
6126 {
6127 elf_linker_section_pointers_t *linker_section_ptr;
6128
6129 BFD_ASSERT (lsect != NULL);
6130
6131 if (h != NULL)
6132 {
6133 /* Handle global symbol. */
6134 struct ppc_elf_link_hash_entry *eh;
6135
6136 eh = (struct ppc_elf_link_hash_entry *) h;
6137 BFD_ASSERT (eh->elf.def_regular);
6138 linker_section_ptr = eh->linker_section_pointer;
6139 }
6140 else
6141 {
6142 /* Handle local symbol. */
6143 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6144
6145 BFD_ASSERT (is_ppc_elf (input_bfd));
6146 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6147 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6148 }
6149
6150 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6151 rel->r_addend,
6152 lsect);
6153 BFD_ASSERT (linker_section_ptr != NULL);
6154
6155 /* Offset will always be a multiple of four, so use the bottom bit
6156 as a "written" flag. */
6157 if ((linker_section_ptr->offset & 1) == 0)
6158 {
6159 bfd_put_32 (lsect->section->owner,
6160 relocation + linker_section_ptr->addend,
6161 lsect->section->contents + linker_section_ptr->offset);
6162 linker_section_ptr->offset += 1;
6163 }
6164
6165 relocation = (lsect->section->output_offset
6166 + linker_section_ptr->offset - 1
6167 - 0x8000);
6168
6169 #ifdef DEBUG
6170 fprintf (stderr,
6171 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6172 lsect->name, (long) relocation, (long) relocation);
6173 #endif
6174
6175 /* Subtract out the addend, because it will get added back in by the normal
6176 processing. */
6177 return relocation - linker_section_ptr->addend;
6178 }
6179
6180 /* The RELOCATE_SECTION function is called by the ELF backend linker
6181 to handle the relocations for a section.
6182
6183 The relocs are always passed as Rela structures; if the section
6184 actually uses Rel structures, the r_addend field will always be
6185 zero.
6186
6187 This function is responsible for adjust the section contents as
6188 necessary, and (if using Rela relocs and generating a
6189 relocatable output file) adjusting the reloc addend as
6190 necessary.
6191
6192 This function does not have to worry about setting the reloc
6193 address or the reloc symbol index.
6194
6195 LOCAL_SYMS is a pointer to the swapped in local symbols.
6196
6197 LOCAL_SECTIONS is an array giving the section in the input file
6198 corresponding to the st_shndx field of each local symbol.
6199
6200 The global hash table entry for the global symbols can be found
6201 via elf_sym_hashes (input_bfd).
6202
6203 When generating relocatable output, this function must handle
6204 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6205 going to be the section symbol corresponding to the output
6206 section, which means that the addend must be adjusted
6207 accordingly. */
6208
6209 static bfd_boolean
6210 ppc_elf_relocate_section (bfd *output_bfd,
6211 struct bfd_link_info *info,
6212 bfd *input_bfd,
6213 asection *input_section,
6214 bfd_byte *contents,
6215 Elf_Internal_Rela *relocs,
6216 Elf_Internal_Sym *local_syms,
6217 asection **local_sections)
6218 {
6219 Elf_Internal_Shdr *symtab_hdr;
6220 struct elf_link_hash_entry **sym_hashes;
6221 struct ppc_elf_link_hash_table *htab;
6222 Elf_Internal_Rela *rel;
6223 Elf_Internal_Rela *relend;
6224 Elf_Internal_Rela outrel;
6225 bfd_byte *loc;
6226 asection *got2, *sreloc = NULL;
6227 bfd_vma *local_got_offsets;
6228 bfd_boolean ret = TRUE;
6229 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6230 bfd_boolean is_vxworks_tls;
6231
6232 #ifdef DEBUG
6233 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6234 "%ld relocations%s",
6235 input_bfd, input_section,
6236 (long) input_section->reloc_count,
6237 (info->relocatable) ? " (relocatable)" : "");
6238 #endif
6239
6240 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6241
6242 /* Initialize howto table if not already done. */
6243 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6244 ppc_elf_howto_init ();
6245
6246 htab = ppc_elf_hash_table (info);
6247 local_got_offsets = elf_local_got_offsets (input_bfd);
6248 symtab_hdr = &elf_symtab_hdr (input_bfd);
6249 sym_hashes = elf_sym_hashes (input_bfd);
6250 /* We have to handle relocations in vxworks .tls_vars sections
6251 specially, because the dynamic loader is 'weird'. */
6252 is_vxworks_tls = (htab->is_vxworks && info->shared
6253 && !strcmp (input_section->output_section->name,
6254 ".tls_vars"));
6255 rel = relocs;
6256 relend = relocs + input_section->reloc_count;
6257 for (; rel < relend; rel++)
6258 {
6259 enum elf_ppc_reloc_type r_type;
6260 bfd_vma addend;
6261 bfd_reloc_status_type r;
6262 Elf_Internal_Sym *sym;
6263 asection *sec;
6264 struct elf_link_hash_entry *h;
6265 const char *sym_name;
6266 reloc_howto_type *howto;
6267 unsigned long r_symndx;
6268 bfd_vma relocation;
6269 bfd_vma branch_bit, insn, from;
6270 bfd_boolean unresolved_reloc;
6271 bfd_boolean warned;
6272 unsigned int tls_type, tls_mask, tls_gd;
6273
6274 r_type = ELF32_R_TYPE (rel->r_info);
6275 sym = NULL;
6276 sec = NULL;
6277 h = NULL;
6278 unresolved_reloc = FALSE;
6279 warned = FALSE;
6280 r_symndx = ELF32_R_SYM (rel->r_info);
6281
6282 if (r_symndx < symtab_hdr->sh_info)
6283 {
6284 sym = local_syms + r_symndx;
6285 sec = local_sections[r_symndx];
6286 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6287
6288 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6289 }
6290 else
6291 {
6292 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6293 r_symndx, symtab_hdr, sym_hashes,
6294 h, sec, relocation,
6295 unresolved_reloc, warned);
6296
6297 sym_name = h->root.root.string;
6298 }
6299
6300 if (sec != NULL && elf_discarded_section (sec))
6301 {
6302 /* For relocs against symbols from removed linkonce sections,
6303 or sections discarded by a linker script, we just want the
6304 section contents zeroed. Avoid any special processing. */
6305 howto = NULL;
6306 if (r_type < R_PPC_max)
6307 howto = ppc_elf_howto_table[r_type];
6308 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6309 rel->r_info = 0;
6310 rel->r_addend = 0;
6311 continue;
6312 }
6313
6314 if (info->relocatable)
6315 {
6316 if (got2 != NULL
6317 && r_type == R_PPC_PLTREL24
6318 && rel->r_addend >= 32768)
6319 {
6320 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6321 addend specifies the GOT pointer offset within .got2. */
6322 rel->r_addend += got2->output_offset;
6323 }
6324 continue;
6325 }
6326
6327 /* TLS optimizations. Replace instruction sequences and relocs
6328 based on information we collected in tls_optimize. We edit
6329 RELOCS so that --emit-relocs will output something sensible
6330 for the final instruction stream. */
6331 tls_mask = 0;
6332 tls_gd = 0;
6333 if (h != NULL)
6334 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6335 else if (local_got_offsets != NULL)
6336 {
6337 char *lgot_masks;
6338 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
6339 tls_mask = lgot_masks[r_symndx];
6340 }
6341
6342 /* Ensure reloc mapping code below stays sane. */
6343 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6344 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6345 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6346 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6347 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6348 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6349 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6350 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6351 abort ();
6352 switch (r_type)
6353 {
6354 default:
6355 break;
6356
6357 case R_PPC_GOT_TPREL16:
6358 case R_PPC_GOT_TPREL16_LO:
6359 if (tls_mask != 0
6360 && (tls_mask & TLS_TPREL) == 0)
6361 {
6362 bfd_vma insn;
6363 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6364 insn &= 31 << 21;
6365 insn |= 0x3c020000; /* addis 0,2,0 */
6366 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6367 r_type = R_PPC_TPREL16_HA;
6368 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6369 }
6370 break;
6371
6372 case R_PPC_TLS:
6373 if (tls_mask != 0
6374 && (tls_mask & TLS_TPREL) == 0)
6375 {
6376 bfd_vma insn, rtra;
6377 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6378 if ((insn & ((31 << 26) | (31 << 11)))
6379 == ((31 << 26) | (2 << 11)))
6380 rtra = insn & ((1 << 26) - (1 << 16));
6381 else if ((insn & ((31 << 26) | (31 << 16)))
6382 == ((31 << 26) | (2 << 16)))
6383 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6384 else
6385 abort ();
6386 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6387 /* add -> addi. */
6388 insn = 14 << 26;
6389 else if ((insn & (31 << 1)) == 23 << 1
6390 && ((insn & (31 << 6)) < 14 << 6
6391 || ((insn & (31 << 6)) >= 16 << 6
6392 && (insn & (31 << 6)) < 24 << 6)))
6393 /* load and store indexed -> dform. */
6394 insn = (32 | ((insn >> 6) & 31)) << 26;
6395 else if ((insn & (31 << 1)) == 21 << 1
6396 && (insn & (0x1a << 6)) == 0)
6397 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6398 insn = (((58 | ((insn >> 6) & 4)) << 26)
6399 | ((insn >> 6) & 1));
6400 else if ((insn & (31 << 1)) == 21 << 1
6401 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6402 /* lwax -> lwa. */
6403 insn = (58 << 26) | 2;
6404 else
6405 abort ();
6406 insn |= rtra;
6407 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6408 r_type = R_PPC_TPREL16_LO;
6409 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6410
6411 /* Was PPC_TLS which sits on insn boundary, now
6412 PPC_TPREL16_LO which is at low-order half-word. */
6413 rel->r_offset += d_offset;
6414 }
6415 break;
6416
6417 case R_PPC_GOT_TLSGD16_HI:
6418 case R_PPC_GOT_TLSGD16_HA:
6419 tls_gd = TLS_TPRELGD;
6420 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6421 goto tls_gdld_hi;
6422 break;
6423
6424 case R_PPC_GOT_TLSLD16_HI:
6425 case R_PPC_GOT_TLSLD16_HA:
6426 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6427 {
6428 tls_gdld_hi:
6429 if ((tls_mask & tls_gd) != 0)
6430 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6431 + R_PPC_GOT_TPREL16);
6432 else
6433 {
6434 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6435 rel->r_offset -= d_offset;
6436 r_type = R_PPC_NONE;
6437 }
6438 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6439 }
6440 break;
6441
6442 case R_PPC_GOT_TLSGD16:
6443 case R_PPC_GOT_TLSGD16_LO:
6444 tls_gd = TLS_TPRELGD;
6445 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6446 goto tls_ldgd_opt;
6447 break;
6448
6449 case R_PPC_GOT_TLSLD16:
6450 case R_PPC_GOT_TLSLD16_LO:
6451 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6452 {
6453 unsigned int insn1, insn2;
6454 bfd_vma offset;
6455
6456 tls_ldgd_opt:
6457 offset = (bfd_vma) -1;
6458 /* If not using the newer R_PPC_TLSGD/LD to mark
6459 __tls_get_addr calls, we must trust that the call
6460 stays with its arg setup insns, ie. that the next
6461 reloc is the __tls_get_addr call associated with
6462 the current reloc. Edit both insns. */
6463 if (input_section->has_tls_get_addr_call
6464 && rel + 1 < relend
6465 && branch_reloc_hash_match (input_bfd, rel + 1,
6466 htab->tls_get_addr))
6467 offset = rel[1].r_offset;
6468 if ((tls_mask & tls_gd) != 0)
6469 {
6470 /* IE */
6471 insn1 = bfd_get_32 (output_bfd,
6472 contents + rel->r_offset - d_offset);
6473 insn1 &= (1 << 26) - 1;
6474 insn1 |= 32 << 26; /* lwz */
6475 if (offset != (bfd_vma) -1)
6476 {
6477 rel[1].r_info
6478 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6479 R_PPC_NONE);
6480 insn2 = 0x7c631214; /* add 3,3,2 */
6481 bfd_put_32 (output_bfd, insn2, contents + offset);
6482 }
6483 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6484 + R_PPC_GOT_TPREL16);
6485 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6486 }
6487 else
6488 {
6489 /* LE */
6490 insn1 = 0x3c620000; /* addis 3,2,0 */
6491 if (tls_gd == 0)
6492 {
6493 /* Was an LD reloc. */
6494 for (r_symndx = 0;
6495 r_symndx < symtab_hdr->sh_info;
6496 r_symndx++)
6497 if (local_sections[r_symndx] == sec)
6498 break;
6499 if (r_symndx >= symtab_hdr->sh_info)
6500 r_symndx = 0;
6501 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6502 if (r_symndx != 0)
6503 rel->r_addend -= (local_syms[r_symndx].st_value
6504 + sec->output_offset
6505 + sec->output_section->vma);
6506 }
6507 r_type = R_PPC_TPREL16_HA;
6508 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6509 if (offset != (bfd_vma) -1)
6510 {
6511 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6512 rel[1].r_offset = offset + d_offset;
6513 rel[1].r_addend = rel->r_addend;
6514 insn2 = 0x38630000; /* addi 3,3,0 */
6515 bfd_put_32 (output_bfd, insn2, contents + offset);
6516 }
6517 }
6518 bfd_put_32 (output_bfd, insn1,
6519 contents + rel->r_offset - d_offset);
6520 if (tls_gd == 0)
6521 {
6522 /* We changed the symbol on an LD reloc. Start over
6523 in order to get h, sym, sec etc. right. */
6524 rel--;
6525 continue;
6526 }
6527 }
6528 break;
6529
6530 case R_PPC_TLSGD:
6531 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6532 {
6533 unsigned int insn2;
6534 bfd_vma offset = rel->r_offset;
6535
6536 if ((tls_mask & TLS_TPRELGD) != 0)
6537 {
6538 /* IE */
6539 r_type = R_PPC_NONE;
6540 insn2 = 0x7c631214; /* add 3,3,2 */
6541 }
6542 else
6543 {
6544 /* LE */
6545 r_type = R_PPC_TPREL16_LO;
6546 rel->r_offset += d_offset;
6547 insn2 = 0x38630000; /* addi 3,3,0 */
6548 }
6549 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6550 bfd_put_32 (output_bfd, insn2, contents + offset);
6551 /* Zap the reloc on the _tls_get_addr call too. */
6552 BFD_ASSERT (offset == rel[1].r_offset);
6553 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6554 R_PPC_NONE);
6555 }
6556 break;
6557
6558 case R_PPC_TLSLD:
6559 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6560 {
6561 unsigned int insn2;
6562
6563 for (r_symndx = 0;
6564 r_symndx < symtab_hdr->sh_info;
6565 r_symndx++)
6566 if (local_sections[r_symndx] == sec)
6567 break;
6568 if (r_symndx >= symtab_hdr->sh_info)
6569 r_symndx = 0;
6570 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6571 if (r_symndx != 0)
6572 rel->r_addend -= (local_syms[r_symndx].st_value
6573 + sec->output_offset
6574 + sec->output_section->vma);
6575
6576 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
6577 rel->r_offset += d_offset;
6578 insn2 = 0x38630000; /* addi 3,3,0 */
6579 bfd_put_32 (output_bfd, insn2,
6580 contents + rel->r_offset - d_offset);
6581 /* Zap the reloc on the _tls_get_addr call too. */
6582 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
6583 rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
6584 R_PPC_NONE);
6585 rel--;
6586 continue;
6587 }
6588 break;
6589 }
6590
6591 /* Handle other relocations that tweak non-addend part of insn. */
6592 branch_bit = 0;
6593 switch (r_type)
6594 {
6595 default:
6596 break;
6597
6598 /* Branch taken prediction relocations. */
6599 case R_PPC_ADDR14_BRTAKEN:
6600 case R_PPC_REL14_BRTAKEN:
6601 branch_bit = BRANCH_PREDICT_BIT;
6602 /* Fall thru */
6603
6604 /* Branch not taken prediction relocations. */
6605 case R_PPC_ADDR14_BRNTAKEN:
6606 case R_PPC_REL14_BRNTAKEN:
6607 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6608 insn &= ~BRANCH_PREDICT_BIT;
6609 insn |= branch_bit;
6610
6611 from = (rel->r_offset
6612 + input_section->output_offset
6613 + input_section->output_section->vma);
6614
6615 /* Invert 'y' bit if not the default. */
6616 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6617 insn ^= BRANCH_PREDICT_BIT;
6618
6619 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6620 break;
6621 }
6622
6623 addend = rel->r_addend;
6624 tls_type = 0;
6625 howto = NULL;
6626 if (r_type < R_PPC_max)
6627 howto = ppc_elf_howto_table[r_type];
6628 switch (r_type)
6629 {
6630 default:
6631 (*_bfd_error_handler)
6632 (_("%B: unknown relocation type %d for symbol %s"),
6633 input_bfd, (int) r_type, sym_name);
6634
6635 bfd_set_error (bfd_error_bad_value);
6636 ret = FALSE;
6637 continue;
6638
6639 case R_PPC_NONE:
6640 case R_PPC_TLS:
6641 case R_PPC_TLSGD:
6642 case R_PPC_TLSLD:
6643 case R_PPC_EMB_MRKREF:
6644 case R_PPC_GNU_VTINHERIT:
6645 case R_PPC_GNU_VTENTRY:
6646 continue;
6647
6648 /* GOT16 relocations. Like an ADDR16 using the symbol's
6649 address in the GOT as relocation value instead of the
6650 symbol's value itself. Also, create a GOT entry for the
6651 symbol and put the symbol value there. */
6652 case R_PPC_GOT_TLSGD16:
6653 case R_PPC_GOT_TLSGD16_LO:
6654 case R_PPC_GOT_TLSGD16_HI:
6655 case R_PPC_GOT_TLSGD16_HA:
6656 tls_type = TLS_TLS | TLS_GD;
6657 goto dogot;
6658
6659 case R_PPC_GOT_TLSLD16:
6660 case R_PPC_GOT_TLSLD16_LO:
6661 case R_PPC_GOT_TLSLD16_HI:
6662 case R_PPC_GOT_TLSLD16_HA:
6663 tls_type = TLS_TLS | TLS_LD;
6664 goto dogot;
6665
6666 case R_PPC_GOT_TPREL16:
6667 case R_PPC_GOT_TPREL16_LO:
6668 case R_PPC_GOT_TPREL16_HI:
6669 case R_PPC_GOT_TPREL16_HA:
6670 tls_type = TLS_TLS | TLS_TPREL;
6671 goto dogot;
6672
6673 case R_PPC_GOT_DTPREL16:
6674 case R_PPC_GOT_DTPREL16_LO:
6675 case R_PPC_GOT_DTPREL16_HI:
6676 case R_PPC_GOT_DTPREL16_HA:
6677 tls_type = TLS_TLS | TLS_DTPREL;
6678 goto dogot;
6679
6680 case R_PPC_GOT16:
6681 case R_PPC_GOT16_LO:
6682 case R_PPC_GOT16_HI:
6683 case R_PPC_GOT16_HA:
6684 tls_mask = 0;
6685 dogot:
6686 {
6687 /* Relocation is to the entry for this symbol in the global
6688 offset table. */
6689 bfd_vma off;
6690 bfd_vma *offp;
6691 unsigned long indx;
6692
6693 if (htab->got == NULL)
6694 abort ();
6695
6696 indx = 0;
6697 if (tls_type == (TLS_TLS | TLS_LD)
6698 && (h == NULL
6699 || !h->def_dynamic))
6700 offp = &htab->tlsld_got.offset;
6701 else if (h != NULL)
6702 {
6703 bfd_boolean dyn;
6704 dyn = htab->elf.dynamic_sections_created;
6705 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6706 || (info->shared
6707 && SYMBOL_REFERENCES_LOCAL (info, h)))
6708 /* This is actually a static link, or it is a
6709 -Bsymbolic link and the symbol is defined
6710 locally, or the symbol was forced to be local
6711 because of a version file. */
6712 ;
6713 else
6714 {
6715 indx = h->dynindx;
6716 unresolved_reloc = FALSE;
6717 }
6718 offp = &h->got.offset;
6719 }
6720 else
6721 {
6722 if (local_got_offsets == NULL)
6723 abort ();
6724 offp = &local_got_offsets[r_symndx];
6725 }
6726
6727 /* The offset must always be a multiple of 4. We use the
6728 least significant bit to record whether we have already
6729 processed this entry. */
6730 off = *offp;
6731 if ((off & 1) != 0)
6732 off &= ~1;
6733 else
6734 {
6735 unsigned int tls_m = (tls_mask
6736 & (TLS_LD | TLS_GD | TLS_DTPREL
6737 | TLS_TPREL | TLS_TPRELGD));
6738
6739 if (offp == &htab->tlsld_got.offset)
6740 tls_m = TLS_LD;
6741 else if (h == NULL
6742 || !h->def_dynamic)
6743 tls_m &= ~TLS_LD;
6744
6745 /* We might have multiple got entries for this sym.
6746 Initialize them all. */
6747 do
6748 {
6749 int tls_ty = 0;
6750
6751 if ((tls_m & TLS_LD) != 0)
6752 {
6753 tls_ty = TLS_TLS | TLS_LD;
6754 tls_m &= ~TLS_LD;
6755 }
6756 else if ((tls_m & TLS_GD) != 0)
6757 {
6758 tls_ty = TLS_TLS | TLS_GD;
6759 tls_m &= ~TLS_GD;
6760 }
6761 else if ((tls_m & TLS_DTPREL) != 0)
6762 {
6763 tls_ty = TLS_TLS | TLS_DTPREL;
6764 tls_m &= ~TLS_DTPREL;
6765 }
6766 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6767 {
6768 tls_ty = TLS_TLS | TLS_TPREL;
6769 tls_m = 0;
6770 }
6771
6772 /* Generate relocs for the dynamic linker. */
6773 if ((info->shared || indx != 0)
6774 && (offp == &htab->tlsld_got.offset
6775 || h == NULL
6776 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6777 || h->root.type != bfd_link_hash_undefweak))
6778 {
6779 outrel.r_offset = (htab->got->output_section->vma
6780 + htab->got->output_offset
6781 + off);
6782 outrel.r_addend = 0;
6783 if (tls_ty & (TLS_LD | TLS_GD))
6784 {
6785 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6786 if (tls_ty == (TLS_TLS | TLS_GD))
6787 {
6788 loc = htab->relgot->contents;
6789 loc += (htab->relgot->reloc_count++
6790 * sizeof (Elf32_External_Rela));
6791 bfd_elf32_swap_reloca_out (output_bfd,
6792 &outrel, loc);
6793 outrel.r_offset += 4;
6794 outrel.r_info
6795 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6796 }
6797 }
6798 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6799 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6800 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6801 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6802 else if (indx == 0)
6803 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6804 else
6805 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6806 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
6807 {
6808 outrel.r_addend += relocation;
6809 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6810 outrel.r_addend -= htab->elf.tls_sec->vma;
6811 }
6812 loc = htab->relgot->contents;
6813 loc += (htab->relgot->reloc_count++
6814 * sizeof (Elf32_External_Rela));
6815 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6816 }
6817
6818 /* Init the .got section contents if we're not
6819 emitting a reloc. */
6820 else
6821 {
6822 bfd_vma value = relocation;
6823
6824 if (tls_ty == (TLS_TLS | TLS_LD))
6825 value = 1;
6826 else if (tls_ty != 0)
6827 {
6828 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6829 if (tls_ty == (TLS_TLS | TLS_TPREL))
6830 value += DTP_OFFSET - TP_OFFSET;
6831
6832 if (tls_ty == (TLS_TLS | TLS_GD))
6833 {
6834 bfd_put_32 (output_bfd, value,
6835 htab->got->contents + off + 4);
6836 value = 1;
6837 }
6838 }
6839 bfd_put_32 (output_bfd, value,
6840 htab->got->contents + off);
6841 }
6842
6843 off += 4;
6844 if (tls_ty & (TLS_LD | TLS_GD))
6845 off += 4;
6846 }
6847 while (tls_m != 0);
6848
6849 off = *offp;
6850 *offp = off | 1;
6851 }
6852
6853 if (off >= (bfd_vma) -2)
6854 abort ();
6855
6856 if ((tls_type & TLS_TLS) != 0)
6857 {
6858 if (tls_type != (TLS_TLS | TLS_LD))
6859 {
6860 if ((tls_mask & TLS_LD) != 0
6861 && !(h == NULL
6862 || !h->def_dynamic))
6863 off += 8;
6864 if (tls_type != (TLS_TLS | TLS_GD))
6865 {
6866 if ((tls_mask & TLS_GD) != 0)
6867 off += 8;
6868 if (tls_type != (TLS_TLS | TLS_DTPREL))
6869 {
6870 if ((tls_mask & TLS_DTPREL) != 0)
6871 off += 4;
6872 }
6873 }
6874 }
6875 }
6876
6877 relocation = (htab->got->output_section->vma
6878 + htab->got->output_offset
6879 + off
6880 - SYM_VAL (htab->elf.hgot));
6881
6882 /* Addends on got relocations don't make much sense.
6883 x+off@got is actually x@got+off, and since the got is
6884 generated by a hash table traversal, the value in the
6885 got at entry m+n bears little relation to the entry m. */
6886 if (addend != 0)
6887 (*_bfd_error_handler)
6888 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6889 input_bfd,
6890 input_section,
6891 (long) rel->r_offset,
6892 howto->name,
6893 sym_name);
6894 }
6895 break;
6896
6897 /* Relocations that need no special processing. */
6898 case R_PPC_LOCAL24PC:
6899 /* It makes no sense to point a local relocation
6900 at a symbol not in this object. */
6901 if (unresolved_reloc)
6902 {
6903 if (! (*info->callbacks->undefined_symbol) (info,
6904 h->root.root.string,
6905 input_bfd,
6906 input_section,
6907 rel->r_offset,
6908 TRUE))
6909 return FALSE;
6910 continue;
6911 }
6912 break;
6913
6914 case R_PPC_DTPREL16:
6915 case R_PPC_DTPREL16_LO:
6916 case R_PPC_DTPREL16_HI:
6917 case R_PPC_DTPREL16_HA:
6918 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6919 break;
6920
6921 /* Relocations that may need to be propagated if this is a shared
6922 object. */
6923 case R_PPC_TPREL16:
6924 case R_PPC_TPREL16_LO:
6925 case R_PPC_TPREL16_HI:
6926 case R_PPC_TPREL16_HA:
6927 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6928 /* The TPREL16 relocs shouldn't really be used in shared
6929 libs as they will result in DT_TEXTREL being set, but
6930 support them anyway. */
6931 goto dodyn;
6932
6933 case R_PPC_TPREL32:
6934 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6935 goto dodyn;
6936
6937 case R_PPC_DTPREL32:
6938 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6939 goto dodyn;
6940
6941 case R_PPC_DTPMOD32:
6942 relocation = 1;
6943 addend = 0;
6944 goto dodyn;
6945
6946 case R_PPC_REL16:
6947 case R_PPC_REL16_LO:
6948 case R_PPC_REL16_HI:
6949 case R_PPC_REL16_HA:
6950 break;
6951
6952 case R_PPC_REL32:
6953 if (h == NULL || h == htab->elf.hgot)
6954 break;
6955 /* fall through */
6956
6957 case R_PPC_ADDR32:
6958 case R_PPC_ADDR16:
6959 case R_PPC_ADDR16_LO:
6960 case R_PPC_ADDR16_HI:
6961 case R_PPC_ADDR16_HA:
6962 case R_PPC_UADDR32:
6963 case R_PPC_UADDR16:
6964 goto dodyn;
6965
6966 case R_PPC_REL24:
6967 case R_PPC_REL14:
6968 case R_PPC_REL14_BRTAKEN:
6969 case R_PPC_REL14_BRNTAKEN:
6970 /* If these relocations are not to a named symbol, they can be
6971 handled right here, no need to bother the dynamic linker. */
6972 if (SYMBOL_CALLS_LOCAL (info, h)
6973 || h == htab->elf.hgot)
6974 break;
6975 /* fall through */
6976
6977 case R_PPC_ADDR24:
6978 case R_PPC_ADDR14:
6979 case R_PPC_ADDR14_BRTAKEN:
6980 case R_PPC_ADDR14_BRNTAKEN:
6981 if (h != NULL && !info->shared)
6982 break;
6983 /* fall through */
6984
6985 dodyn:
6986 if ((input_section->flags & SEC_ALLOC) == 0
6987 || is_vxworks_tls)
6988 break;
6989
6990 if ((info->shared
6991 && !(h != NULL
6992 && ((h->root.type == bfd_link_hash_undefined
6993 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6994 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6995 || (h->root.type == bfd_link_hash_undefweak
6996 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
6997 && (must_be_dyn_reloc (info, r_type)
6998 || !SYMBOL_CALLS_LOCAL (info, h)))
6999 || (ELIMINATE_COPY_RELOCS
7000 && !info->shared
7001 && h != NULL
7002 && h->dynindx != -1
7003 && !h->non_got_ref
7004 && !h->def_regular))
7005 {
7006 int skip;
7007
7008 #ifdef DEBUG
7009 fprintf (stderr, "ppc_elf_relocate_section needs to "
7010 "create relocation for %s\n",
7011 (h && h->root.root.string
7012 ? h->root.root.string : "<unknown>"));
7013 #endif
7014
7015 /* When generating a shared object, these relocations
7016 are copied into the output file to be resolved at run
7017 time. */
7018 if (sreloc == NULL)
7019 {
7020 sreloc = _bfd_elf_get_dynamic_reloc_section
7021 (input_bfd, input_section, /*rela?*/ TRUE);
7022 if (sreloc == NULL)
7023 return FALSE;
7024 }
7025
7026 skip = 0;
7027 outrel.r_offset =
7028 _bfd_elf_section_offset (output_bfd, info, input_section,
7029 rel->r_offset);
7030 if (outrel.r_offset == (bfd_vma) -1
7031 || outrel.r_offset == (bfd_vma) -2)
7032 skip = (int) outrel.r_offset;
7033 outrel.r_offset += (input_section->output_section->vma
7034 + input_section->output_offset);
7035
7036 if (skip)
7037 memset (&outrel, 0, sizeof outrel);
7038 else if ((h != NULL
7039 && (h->root.type == bfd_link_hash_undefined
7040 || h->root.type == bfd_link_hash_undefweak))
7041 || !SYMBOL_REFERENCES_LOCAL (info, h))
7042 {
7043 unresolved_reloc = FALSE;
7044 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7045 outrel.r_addend = rel->r_addend;
7046 }
7047 else
7048 {
7049 outrel.r_addend = relocation + rel->r_addend;
7050
7051 if (r_type == R_PPC_ADDR32)
7052 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7053 else
7054 {
7055 long indx = 0;
7056
7057 if (r_symndx == 0 || bfd_is_abs_section (sec))
7058 ;
7059 else if (sec == NULL || sec->owner == NULL)
7060 {
7061 bfd_set_error (bfd_error_bad_value);
7062 ret = FALSE;
7063 }
7064 else
7065 {
7066 asection *osec;
7067
7068 /* We are turning this relocation into one
7069 against a section symbol. It would be
7070 proper to subtract the symbol's value,
7071 osec->vma, from the emitted reloc addend,
7072 but ld.so expects buggy relocs. */
7073 osec = sec->output_section;
7074 indx = elf_section_data (osec)->dynindx;
7075 if (indx == 0)
7076 {
7077 osec = htab->elf.text_index_section;
7078 indx = elf_section_data (osec)->dynindx;
7079 }
7080 BFD_ASSERT (indx != 0);
7081 #ifdef DEBUG
7082 if (indx == 0)
7083 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7084 indx, osec->name, osec->flags,
7085 h->root.root.string);
7086 #endif
7087 }
7088
7089 outrel.r_info = ELF32_R_INFO (indx, r_type);
7090 }
7091 }
7092
7093 loc = sreloc->contents;
7094 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7095 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7096
7097 if (skip == -1)
7098 continue;
7099
7100 /* This reloc will be computed at runtime. We clear the memory
7101 so that it contains predictable value. */
7102 if (! skip
7103 && ((input_section->flags & SEC_ALLOC) != 0
7104 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7105 {
7106 relocation = howto->pc_relative ? outrel.r_offset : 0;
7107 addend = 0;
7108 break;
7109 }
7110 }
7111 break;
7112
7113 case R_PPC_RELAX32PC_PLT:
7114 case R_PPC_RELAX32_PLT:
7115 {
7116 struct plt_entry *ent = find_plt_ent (h, got2, addend);
7117
7118 if (htab->plt_type == PLT_NEW)
7119 relocation = (htab->glink->output_section->vma
7120 + htab->glink->output_offset
7121 + ent->glink_offset);
7122 else
7123 relocation = (htab->plt->output_section->vma
7124 + htab->plt->output_offset
7125 + ent->plt.offset);
7126 }
7127 if (r_type == R_PPC_RELAX32_PLT)
7128 goto relax32;
7129 /* Fall thru */
7130
7131 case R_PPC_RELAX32PC:
7132 relocation -= (input_section->output_section->vma
7133 + input_section->output_offset
7134 + rel->r_offset - 4);
7135 /* Fall thru */
7136
7137 case R_PPC_RELAX32:
7138 relax32:
7139 {
7140 unsigned long t0;
7141 unsigned long t1;
7142
7143 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7144 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7145
7146 /* We're clearing the bits for R_PPC_ADDR16_HA
7147 and R_PPC_ADDR16_LO here. */
7148 t0 &= ~0xffff;
7149 t1 &= ~0xffff;
7150
7151 /* t0 is HA, t1 is LO */
7152 relocation += addend;
7153 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7154 t1 |= relocation & 0xffff;
7155
7156 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7157 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7158
7159 /* Rewrite the reloc and convert one of the trailing nop
7160 relocs to describe this relocation. */
7161 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7162 /* The relocs are at the bottom 2 bytes */
7163 rel[0].r_offset += 2;
7164 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7165 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7166 rel[1].r_offset += 4;
7167 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7168 rel++;
7169 }
7170 continue;
7171
7172 /* Indirect .sdata relocation. */
7173 case R_PPC_EMB_SDAI16:
7174 BFD_ASSERT (htab->sdata[0].section != NULL);
7175 relocation
7176 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7177 h, relocation, rel);
7178 break;
7179
7180 /* Indirect .sdata2 relocation. */
7181 case R_PPC_EMB_SDA2I16:
7182 BFD_ASSERT (htab->sdata[1].section != NULL);
7183 relocation
7184 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7185 h, relocation, rel);
7186 break;
7187
7188 /* Handle the TOC16 reloc. We want to use the offset within the .got
7189 section, not the actual VMA. This is appropriate when generating
7190 an embedded ELF object, for which the .got section acts like the
7191 AIX .toc section. */
7192 case R_PPC_TOC16: /* phony GOT16 relocations */
7193 if (sec == NULL || sec->output_section == NULL)
7194 {
7195 unresolved_reloc = TRUE;
7196 break;
7197 }
7198 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7199 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7200
7201 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7202 break;
7203
7204 case R_PPC_PLTREL24:
7205 /* Relocation is to the entry for this symbol in the
7206 procedure linkage table. */
7207 {
7208 struct plt_entry *ent = find_plt_ent (h, got2, addend);
7209
7210 addend = 0;
7211 if (ent == NULL
7212 || htab->plt == NULL)
7213 {
7214 /* We didn't make a PLT entry for this symbol. This
7215 happens when statically linking PIC code, or when
7216 using -Bsymbolic. */
7217 break;
7218 }
7219
7220 unresolved_reloc = FALSE;
7221 if (htab->plt_type == PLT_NEW)
7222 relocation = (htab->glink->output_section->vma
7223 + htab->glink->output_offset
7224 + ent->glink_offset);
7225 else
7226 relocation = (htab->plt->output_section->vma
7227 + htab->plt->output_offset
7228 + ent->plt.offset);
7229 }
7230 break;
7231
7232 /* Relocate against _SDA_BASE_. */
7233 case R_PPC_SDAREL16:
7234 {
7235 const char *name;
7236
7237 if (sec == NULL || sec->output_section == NULL)
7238 {
7239 unresolved_reloc = TRUE;
7240 break;
7241 }
7242
7243 name = bfd_get_section_name (abfd, sec->output_section);
7244 if (! ((CONST_STRNEQ (name, ".sdata")
7245 && (name[6] == 0 || name[6] == '.'))
7246 || (CONST_STRNEQ (name, ".sbss")
7247 && (name[5] == 0 || name[5] == '.'))))
7248 {
7249 (*_bfd_error_handler)
7250 (_("%B: the target (%s) of a %s relocation is "
7251 "in the wrong output section (%s)"),
7252 input_bfd,
7253 sym_name,
7254 howto->name,
7255 name);
7256 }
7257 addend -= SYM_VAL (htab->sdata[0].sym);
7258 }
7259 break;
7260
7261 /* Relocate against _SDA2_BASE_. */
7262 case R_PPC_EMB_SDA2REL:
7263 {
7264 const char *name;
7265
7266 if (sec == NULL || sec->output_section == NULL)
7267 {
7268 unresolved_reloc = TRUE;
7269 break;
7270 }
7271
7272 name = bfd_get_section_name (abfd, sec->output_section);
7273 if (! (CONST_STRNEQ (name, ".sdata2")
7274 || CONST_STRNEQ (name, ".sbss2")))
7275 {
7276 (*_bfd_error_handler)
7277 (_("%B: the target (%s) of a %s relocation is "
7278 "in the wrong output section (%s)"),
7279 input_bfd,
7280 sym_name,
7281 howto->name,
7282 name);
7283
7284 bfd_set_error (bfd_error_bad_value);
7285 ret = FALSE;
7286 continue;
7287 }
7288 addend -= SYM_VAL (htab->sdata[1].sym);
7289 }
7290 break;
7291
7292 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7293 case R_PPC_EMB_SDA21:
7294 case R_PPC_EMB_RELSDA:
7295 {
7296 const char *name;
7297 int reg;
7298
7299 if (sec == NULL || sec->output_section == NULL)
7300 {
7301 unresolved_reloc = TRUE;
7302 break;
7303 }
7304
7305 name = bfd_get_section_name (abfd, sec->output_section);
7306 if (((CONST_STRNEQ (name, ".sdata")
7307 && (name[6] == 0 || name[6] == '.'))
7308 || (CONST_STRNEQ (name, ".sbss")
7309 && (name[5] == 0 || name[5] == '.'))))
7310 {
7311 reg = 13;
7312 addend -= SYM_VAL (htab->sdata[0].sym);
7313 }
7314 else if (CONST_STRNEQ (name, ".sdata2")
7315 || CONST_STRNEQ (name, ".sbss2"))
7316 {
7317 reg = 2;
7318 addend -= SYM_VAL (htab->sdata[1].sym);
7319 }
7320 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7321 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7322 {
7323 reg = 0;
7324 }
7325 else
7326 {
7327 (*_bfd_error_handler)
7328 (_("%B: the target (%s) of a %s relocation is "
7329 "in the wrong output section (%s)"),
7330 input_bfd,
7331 sym_name,
7332 howto->name,
7333 name);
7334
7335 bfd_set_error (bfd_error_bad_value);
7336 ret = FALSE;
7337 continue;
7338 }
7339
7340 if (r_type == R_PPC_EMB_SDA21)
7341 { /* fill in register field */
7342 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7343 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7344 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7345 }
7346 }
7347 break;
7348
7349 /* Relocate against the beginning of the section. */
7350 case R_PPC_SECTOFF:
7351 case R_PPC_SECTOFF_LO:
7352 case R_PPC_SECTOFF_HI:
7353 case R_PPC_SECTOFF_HA:
7354 if (sec == NULL || sec->output_section == NULL)
7355 {
7356 unresolved_reloc = TRUE;
7357 break;
7358 }
7359 addend -= sec->output_section->vma;
7360 break;
7361
7362 /* Negative relocations. */
7363 case R_PPC_EMB_NADDR32:
7364 case R_PPC_EMB_NADDR16:
7365 case R_PPC_EMB_NADDR16_LO:
7366 case R_PPC_EMB_NADDR16_HI:
7367 case R_PPC_EMB_NADDR16_HA:
7368 addend -= 2 * relocation;
7369 break;
7370
7371 case R_PPC_COPY:
7372 case R_PPC_GLOB_DAT:
7373 case R_PPC_JMP_SLOT:
7374 case R_PPC_RELATIVE:
7375 case R_PPC_PLT32:
7376 case R_PPC_PLTREL32:
7377 case R_PPC_PLT16_LO:
7378 case R_PPC_PLT16_HI:
7379 case R_PPC_PLT16_HA:
7380 case R_PPC_ADDR30:
7381 case R_PPC_EMB_RELSEC16:
7382 case R_PPC_EMB_RELST_LO:
7383 case R_PPC_EMB_RELST_HI:
7384 case R_PPC_EMB_RELST_HA:
7385 case R_PPC_EMB_BIT_FLD:
7386 (*_bfd_error_handler)
7387 (_("%B: relocation %s is not yet supported for symbol %s."),
7388 input_bfd,
7389 howto->name,
7390 sym_name);
7391
7392 bfd_set_error (bfd_error_invalid_operation);
7393 ret = FALSE;
7394 continue;
7395 }
7396
7397 /* Do any further special processing. */
7398 switch (r_type)
7399 {
7400 default:
7401 break;
7402
7403 case R_PPC_ADDR16_HA:
7404 case R_PPC_REL16_HA:
7405 case R_PPC_SECTOFF_HA:
7406 case R_PPC_TPREL16_HA:
7407 case R_PPC_DTPREL16_HA:
7408 case R_PPC_EMB_NADDR16_HA:
7409 case R_PPC_EMB_RELST_HA:
7410 /* It's just possible that this symbol is a weak symbol
7411 that's not actually defined anywhere. In that case,
7412 'sec' would be NULL, and we should leave the symbol
7413 alone (it will be set to zero elsewhere in the link). */
7414 if (sec == NULL)
7415 break;
7416 /* Fall thru */
7417
7418 case R_PPC_PLT16_HA:
7419 case R_PPC_GOT16_HA:
7420 case R_PPC_GOT_TLSGD16_HA:
7421 case R_PPC_GOT_TLSLD16_HA:
7422 case R_PPC_GOT_TPREL16_HA:
7423 case R_PPC_GOT_DTPREL16_HA:
7424 /* Add 0x10000 if sign bit in 0:15 is set.
7425 Bits 0:15 are not used. */
7426 addend += 0x8000;
7427 break;
7428 }
7429
7430 #ifdef DEBUG
7431 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7432 "offset = %ld, addend = %ld\n",
7433 howto->name,
7434 (int) r_type,
7435 sym_name,
7436 r_symndx,
7437 (long) rel->r_offset,
7438 (long) addend);
7439 #endif
7440
7441 if (unresolved_reloc
7442 && !((input_section->flags & SEC_DEBUGGING) != 0
7443 && h->def_dynamic))
7444 {
7445 (*_bfd_error_handler)
7446 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7447 input_bfd,
7448 input_section,
7449 (long) rel->r_offset,
7450 howto->name,
7451 sym_name);
7452 ret = FALSE;
7453 }
7454
7455 r = _bfd_final_link_relocate (howto,
7456 input_bfd,
7457 input_section,
7458 contents,
7459 rel->r_offset,
7460 relocation,
7461 addend);
7462
7463 if (r != bfd_reloc_ok)
7464 {
7465 if (r == bfd_reloc_overflow)
7466 {
7467 if (warned)
7468 continue;
7469 if (h != NULL
7470 && h->root.type == bfd_link_hash_undefweak
7471 && howto->pc_relative)
7472 {
7473 /* Assume this is a call protected by other code that
7474 detect the symbol is undefined. If this is the case,
7475 we can safely ignore the overflow. If not, the
7476 program is hosed anyway, and a little warning isn't
7477 going to help. */
7478
7479 continue;
7480 }
7481
7482 if (! (*info->callbacks->reloc_overflow) (info,
7483 (h ? &h->root : NULL),
7484 sym_name,
7485 howto->name,
7486 rel->r_addend,
7487 input_bfd,
7488 input_section,
7489 rel->r_offset))
7490 return FALSE;
7491 }
7492 else
7493 {
7494 (*_bfd_error_handler)
7495 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
7496 input_bfd, input_section,
7497 (long) rel->r_offset, howto->name, sym_name, (int) r);
7498 ret = FALSE;
7499 }
7500 }
7501 }
7502
7503 #ifdef DEBUG
7504 fprintf (stderr, "\n");
7505 #endif
7506
7507 return ret;
7508 }
7509 \f
7510 #define PPC_LO(v) ((v) & 0xffff)
7511 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7512 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7513
7514 /* Finish up dynamic symbol handling. We set the contents of various
7515 dynamic sections here. */
7516
7517 static bfd_boolean
7518 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7519 struct bfd_link_info *info,
7520 struct elf_link_hash_entry *h,
7521 Elf_Internal_Sym *sym)
7522 {
7523 struct ppc_elf_link_hash_table *htab;
7524 struct plt_entry *ent;
7525 bfd_boolean doneone;
7526
7527 #ifdef DEBUG
7528 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7529 h->root.root.string);
7530 #endif
7531
7532 htab = ppc_elf_hash_table (info);
7533 BFD_ASSERT (htab->elf.dynobj != NULL);
7534
7535 doneone = FALSE;
7536 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7537 if (ent->plt.offset != (bfd_vma) -1)
7538 {
7539 if (!doneone)
7540 {
7541 Elf_Internal_Rela rela;
7542 bfd_byte *loc;
7543 bfd_vma reloc_index;
7544
7545 if (htab->plt_type == PLT_NEW)
7546 reloc_index = ent->plt.offset / 4;
7547 else
7548 {
7549 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7550 / htab->plt_slot_size);
7551 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7552 && htab->plt_type == PLT_OLD)
7553 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7554 }
7555
7556 /* This symbol has an entry in the procedure linkage table.
7557 Set it up. */
7558 if (htab->plt_type == PLT_VXWORKS)
7559 {
7560 bfd_vma got_offset;
7561 const bfd_vma *plt_entry;
7562
7563 /* The first three entries in .got.plt are reserved. */
7564 got_offset = (reloc_index + 3) * 4;
7565
7566 /* Use the right PLT. */
7567 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7568 : ppc_elf_vxworks_plt_entry;
7569
7570 /* Fill in the .plt on VxWorks. */
7571 if (info->shared)
7572 {
7573 bfd_put_32 (output_bfd,
7574 plt_entry[0] | PPC_HA (got_offset),
7575 htab->plt->contents + ent->plt.offset + 0);
7576 bfd_put_32 (output_bfd,
7577 plt_entry[1] | PPC_LO (got_offset),
7578 htab->plt->contents + ent->plt.offset + 4);
7579 }
7580 else
7581 {
7582 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
7583
7584 bfd_put_32 (output_bfd,
7585 plt_entry[0] | PPC_HA (got_loc),
7586 htab->plt->contents + ent->plt.offset + 0);
7587 bfd_put_32 (output_bfd,
7588 plt_entry[1] | PPC_LO (got_loc),
7589 htab->plt->contents + ent->plt.offset + 4);
7590 }
7591
7592 bfd_put_32 (output_bfd, plt_entry[2],
7593 htab->plt->contents + ent->plt.offset + 8);
7594 bfd_put_32 (output_bfd, plt_entry[3],
7595 htab->plt->contents + ent->plt.offset + 12);
7596
7597 /* This instruction is an immediate load. The value loaded is
7598 the byte offset of the R_PPC_JMP_SLOT relocation from the
7599 start of the .rela.plt section. The value is stored in the
7600 low-order 16 bits of the load instruction. */
7601 /* NOTE: It appears that this is now an index rather than a
7602 prescaled offset. */
7603 bfd_put_32 (output_bfd,
7604 plt_entry[4] | reloc_index,
7605 htab->plt->contents + ent->plt.offset + 16);
7606 /* This instruction is a PC-relative branch whose target is
7607 the start of the PLT section. The address of this branch
7608 instruction is 20 bytes beyond the start of this PLT entry.
7609 The address is encoded in bits 6-29, inclusive. The value
7610 stored is right-shifted by two bits, permitting a 26-bit
7611 offset. */
7612 bfd_put_32 (output_bfd,
7613 (plt_entry[5]
7614 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7615 htab->plt->contents + ent->plt.offset + 20);
7616 bfd_put_32 (output_bfd, plt_entry[6],
7617 htab->plt->contents + ent->plt.offset + 24);
7618 bfd_put_32 (output_bfd, plt_entry[7],
7619 htab->plt->contents + ent->plt.offset + 28);
7620
7621 /* Fill in the GOT entry corresponding to this PLT slot with
7622 the address immediately after the the "bctr" instruction
7623 in this PLT entry. */
7624 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7625 + htab->plt->output_offset
7626 + ent->plt.offset + 16),
7627 htab->sgotplt->contents + got_offset);
7628
7629 if (!info->shared)
7630 {
7631 /* Fill in a couple of entries in .rela.plt.unloaded. */
7632 loc = htab->srelplt2->contents
7633 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7634 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7635 * sizeof (Elf32_External_Rela));
7636
7637 /* Provide the @ha relocation for the first instruction. */
7638 rela.r_offset = (htab->plt->output_section->vma
7639 + htab->plt->output_offset
7640 + ent->plt.offset + 2);
7641 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7642 R_PPC_ADDR16_HA);
7643 rela.r_addend = got_offset;
7644 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7645 loc += sizeof (Elf32_External_Rela);
7646
7647 /* Provide the @l relocation for the second instruction. */
7648 rela.r_offset = (htab->plt->output_section->vma
7649 + htab->plt->output_offset
7650 + ent->plt.offset + 6);
7651 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7652 R_PPC_ADDR16_LO);
7653 rela.r_addend = got_offset;
7654 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7655 loc += sizeof (Elf32_External_Rela);
7656
7657 /* Provide a relocation for the GOT entry corresponding to this
7658 PLT slot. Point it at the middle of the .plt entry. */
7659 rela.r_offset = (htab->sgotplt->output_section->vma
7660 + htab->sgotplt->output_offset
7661 + got_offset);
7662 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7663 R_PPC_ADDR32);
7664 rela.r_addend = ent->plt.offset + 16;
7665 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7666 }
7667
7668 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7669 In particular, the offset for the relocation is not the
7670 address of the PLT entry for this function, as specified
7671 by the ABI. Instead, the offset is set to the address of
7672 the GOT slot for this function. See EABI 4.4.4.1. */
7673 rela.r_offset = (htab->sgotplt->output_section->vma
7674 + htab->sgotplt->output_offset
7675 + got_offset);
7676
7677 }
7678 else
7679 {
7680 rela.r_offset = (htab->plt->output_section->vma
7681 + htab->plt->output_offset
7682 + ent->plt.offset);
7683 if (htab->plt_type == PLT_OLD)
7684 {
7685 /* We don't need to fill in the .plt. The ppc dynamic
7686 linker will fill it in. */
7687 }
7688 else
7689 {
7690 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7691 + htab->glink->output_section->vma
7692 + htab->glink->output_offset);
7693 bfd_put_32 (output_bfd, val,
7694 htab->plt->contents + ent->plt.offset);
7695 }
7696 }
7697
7698 /* Fill in the entry in the .rela.plt section. */
7699 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7700 rela.r_addend = 0;
7701
7702 loc = (htab->relplt->contents
7703 + reloc_index * sizeof (Elf32_External_Rela));
7704 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7705
7706 if (!h->def_regular)
7707 {
7708 /* Mark the symbol as undefined, rather than as
7709 defined in the .plt section. Leave the value if
7710 there were any relocations where pointer equality
7711 matters (this is a clue for the dynamic linker, to
7712 make function pointer comparisons work between an
7713 application and shared library), otherwise set it
7714 to zero. */
7715 sym->st_shndx = SHN_UNDEF;
7716 if (!h->pointer_equality_needed)
7717 sym->st_value = 0;
7718 else if (!h->ref_regular_nonweak)
7719 {
7720 /* This breaks function pointer comparisons, but
7721 that is better than breaking tests for a NULL
7722 function pointer. */
7723 sym->st_value = 0;
7724 }
7725 }
7726 doneone = TRUE;
7727 }
7728
7729 if (htab->plt_type == PLT_NEW)
7730 {
7731 bfd_vma plt;
7732 unsigned char *p;
7733
7734 plt = (ent->plt.offset
7735 + htab->plt->output_section->vma
7736 + htab->plt->output_offset);
7737 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7738
7739 if (info->shared || info->pie)
7740 {
7741 bfd_vma got = 0;
7742
7743 if (ent->addend >= 32768)
7744 got = (ent->addend
7745 + ent->sec->output_section->vma
7746 + ent->sec->output_offset);
7747 else if (htab->elf.hgot != NULL)
7748 got = SYM_VAL (htab->elf.hgot);
7749
7750 plt -= got;
7751
7752 if (plt + 0x8000 < 0x10000)
7753 {
7754 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7755 p += 4;
7756 bfd_put_32 (output_bfd, MTCTR_11, p);
7757 p += 4;
7758 bfd_put_32 (output_bfd, BCTR, p);
7759 p += 4;
7760 bfd_put_32 (output_bfd, NOP, p);
7761 p += 4;
7762 }
7763 else
7764 {
7765 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7766 p += 4;
7767 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7768 p += 4;
7769 bfd_put_32 (output_bfd, MTCTR_11, p);
7770 p += 4;
7771 bfd_put_32 (output_bfd, BCTR, p);
7772 p += 4;
7773 }
7774 }
7775 else
7776 {
7777 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7778 p += 4;
7779 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7780 p += 4;
7781 bfd_put_32 (output_bfd, MTCTR_11, p);
7782 p += 4;
7783 bfd_put_32 (output_bfd, BCTR, p);
7784 p += 4;
7785
7786 /* We only need one non-PIC glink stub. */
7787 break;
7788 }
7789 }
7790 else
7791 break;
7792 }
7793
7794 if (h->needs_copy)
7795 {
7796 asection *s;
7797 Elf_Internal_Rela rela;
7798 bfd_byte *loc;
7799
7800 /* This symbols needs a copy reloc. Set it up. */
7801
7802 #ifdef DEBUG
7803 fprintf (stderr, ", copy");
7804 #endif
7805
7806 BFD_ASSERT (h->dynindx != -1);
7807
7808 if (ppc_elf_hash_entry (h)->has_sda_refs)
7809 s = htab->relsbss;
7810 else
7811 s = htab->relbss;
7812 BFD_ASSERT (s != NULL);
7813
7814 rela.r_offset = SYM_VAL (h);
7815 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7816 rela.r_addend = 0;
7817 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7818 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7819 }
7820
7821 #ifdef DEBUG
7822 fprintf (stderr, "\n");
7823 #endif
7824
7825 /* Mark some specially defined symbols as absolute. */
7826 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7827 || (!htab->is_vxworks
7828 && (h == htab->elf.hgot
7829 || strcmp (h->root.root.string,
7830 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7831 sym->st_shndx = SHN_ABS;
7832
7833 return TRUE;
7834 }
7835 \f
7836 static enum elf_reloc_type_class
7837 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7838 {
7839 switch (ELF32_R_TYPE (rela->r_info))
7840 {
7841 case R_PPC_RELATIVE:
7842 return reloc_class_relative;
7843 case R_PPC_REL24:
7844 case R_PPC_ADDR24:
7845 case R_PPC_JMP_SLOT:
7846 return reloc_class_plt;
7847 case R_PPC_COPY:
7848 return reloc_class_copy;
7849 default:
7850 return reloc_class_normal;
7851 }
7852 }
7853 \f
7854 /* Finish up the dynamic sections. */
7855
7856 static bfd_boolean
7857 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7858 struct bfd_link_info *info)
7859 {
7860 asection *sdyn;
7861 asection *splt;
7862 struct ppc_elf_link_hash_table *htab;
7863 bfd_vma got;
7864 bfd *dynobj;
7865 bfd_boolean ret = TRUE;
7866
7867 #ifdef DEBUG
7868 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7869 #endif
7870
7871 htab = ppc_elf_hash_table (info);
7872 dynobj = elf_hash_table (info)->dynobj;
7873 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7874 if (htab->is_vxworks)
7875 splt = bfd_get_section_by_name (dynobj, ".plt");
7876 else
7877 splt = NULL;
7878
7879 got = 0;
7880 if (htab->elf.hgot != NULL)
7881 got = SYM_VAL (htab->elf.hgot);
7882
7883 if (htab->elf.dynamic_sections_created)
7884 {
7885 Elf32_External_Dyn *dyncon, *dynconend;
7886
7887 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7888
7889 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7890 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7891 for (; dyncon < dynconend; dyncon++)
7892 {
7893 Elf_Internal_Dyn dyn;
7894 asection *s;
7895
7896 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7897
7898 switch (dyn.d_tag)
7899 {
7900 case DT_PLTGOT:
7901 if (htab->is_vxworks)
7902 s = htab->sgotplt;
7903 else
7904 s = htab->plt;
7905 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7906 break;
7907
7908 case DT_PLTRELSZ:
7909 dyn.d_un.d_val = htab->relplt->size;
7910 break;
7911
7912 case DT_JMPREL:
7913 s = htab->relplt;
7914 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7915 break;
7916
7917 case DT_PPC_GOT:
7918 dyn.d_un.d_ptr = got;
7919 break;
7920
7921 case DT_RELASZ:
7922 if (htab->is_vxworks)
7923 {
7924 if (htab->relplt)
7925 dyn.d_un.d_ptr -= htab->relplt->size;
7926 break;
7927 }
7928 continue;
7929
7930 default:
7931 if (htab->is_vxworks
7932 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7933 break;
7934 continue;
7935 }
7936
7937 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7938 }
7939 }
7940
7941 if (htab->got != NULL)
7942 {
7943 if (htab->elf.hgot->root.u.def.section == htab->got
7944 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
7945 {
7946 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
7947
7948 p += htab->elf.hgot->root.u.def.value;
7949 if (htab->plt_type == PLT_OLD)
7950 {
7951 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
7952 so that a function can easily find the address of
7953 _GLOBAL_OFFSET_TABLE_. */
7954 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
7955 < htab->elf.hgot->root.u.def.section->size);
7956 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
7957 }
7958
7959 if (sdyn != NULL)
7960 {
7961 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
7962 BFD_ASSERT (htab->elf.hgot->root.u.def.value
7963 < htab->elf.hgot->root.u.def.section->size);
7964 bfd_put_32 (output_bfd, val, p);
7965 }
7966 }
7967 else
7968 {
7969 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
7970 htab->elf.hgot->root.root.string,
7971 (htab->sgotplt != NULL
7972 ? htab->sgotplt->name : htab->got->name));
7973 bfd_set_error (bfd_error_bad_value);
7974 ret = FALSE;
7975 }
7976
7977 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7978 }
7979
7980 /* Fill in the first entry in the VxWorks procedure linkage table. */
7981 if (splt && splt->size > 0)
7982 {
7983 /* Use the right PLT. */
7984 static const bfd_vma *plt_entry = NULL;
7985 plt_entry = info->shared ?
7986 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7987
7988 if (!info->shared)
7989 {
7990 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
7991
7992 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
7993 splt->contents + 0);
7994 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
7995 splt->contents + 4);
7996 }
7997 else
7998 {
7999 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8000 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8001 }
8002 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8003 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8004 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8005 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8006 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8007 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8008
8009 if (! info->shared)
8010 {
8011 Elf_Internal_Rela rela;
8012 bfd_byte *loc;
8013
8014 loc = htab->srelplt2->contents;
8015
8016 /* Output the @ha relocation for the first instruction. */
8017 rela.r_offset = (htab->plt->output_section->vma
8018 + htab->plt->output_offset
8019 + 2);
8020 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8021 rela.r_addend = 0;
8022 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8023 loc += sizeof (Elf32_External_Rela);
8024
8025 /* Output the @l relocation for the second instruction. */
8026 rela.r_offset = (htab->plt->output_section->vma
8027 + htab->plt->output_offset
8028 + 6);
8029 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8030 rela.r_addend = 0;
8031 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8032 loc += sizeof (Elf32_External_Rela);
8033
8034 /* Fix up the remaining relocations. They may have the wrong
8035 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8036 in which symbols were output. */
8037 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8038 {
8039 Elf_Internal_Rela rel;
8040
8041 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8042 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8043 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8044 loc += sizeof (Elf32_External_Rela);
8045
8046 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8047 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8048 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8049 loc += sizeof (Elf32_External_Rela);
8050
8051 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8052 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8053 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8054 loc += sizeof (Elf32_External_Rela);
8055 }
8056 }
8057 }
8058
8059 if (htab->glink != NULL && htab->glink->contents != NULL)
8060 {
8061 unsigned char *p;
8062 unsigned char *endp;
8063 bfd_vma res0;
8064 unsigned int i;
8065
8066 /*
8067 * PIC glink code is the following:
8068 *
8069 * # ith PLT code stub.
8070 * addis 11,30,(plt+(i-1)*4-got)@ha
8071 * lwz 11,(plt+(i-1)*4-got)@l(11)
8072 * mtctr 11
8073 * bctr
8074 *
8075 * # A table of branches, one for each plt entry.
8076 * # The idea is that the plt call stub loads ctr and r11 with these
8077 * # addresses, so (r11 - res_0) gives the plt index * 4.
8078 * res_0: b PLTresolve
8079 * res_1: b PLTresolve
8080 * .
8081 * # Some number of entries towards the end can be nops
8082 * res_n_m3: nop
8083 * res_n_m2: nop
8084 * res_n_m1:
8085 *
8086 * PLTresolve:
8087 * addis 11,11,(1f-res_0)@ha
8088 * mflr 0
8089 * bcl 20,31,1f
8090 * 1: addi 11,11,(1b-res_0)@l
8091 * mflr 12
8092 * mtlr 0
8093 * sub 11,11,12 # r11 = index * 4
8094 * addis 12,12,(got+4-1b)@ha
8095 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8096 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8097 * mtctr 0
8098 * add 0,11,11
8099 * add 11,0,11 # r11 = index * 12 = reloc offset.
8100 * bctr
8101 */
8102 static const unsigned int pic_plt_resolve[] =
8103 {
8104 ADDIS_11_11,
8105 MFLR_0,
8106 BCL_20_31,
8107 ADDI_11_11,
8108 MFLR_12,
8109 MTLR_0,
8110 SUB_11_11_12,
8111 ADDIS_12_12,
8112 LWZ_0_12,
8113 LWZ_12_12,
8114 MTCTR_0,
8115 ADD_0_11_11,
8116 ADD_11_0_11,
8117 BCTR,
8118 NOP,
8119 NOP
8120 };
8121
8122 /*
8123 * Non-PIC glink code is a little simpler.
8124 *
8125 * # ith PLT code stub.
8126 * lis 11,(plt+(i-1)*4)@ha
8127 * lwz 11,(plt+(i-1)*4)@l(11)
8128 * mtctr 11
8129 * bctr
8130 *
8131 * The branch table is the same, then comes
8132 *
8133 * PLTresolve:
8134 * lis 12,(got+4)@ha
8135 * addis 11,11,(-res_0)@ha
8136 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8137 * addi 11,11,(-res_0)@l # r11 = index * 4
8138 * mtctr 0
8139 * add 0,11,11
8140 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8141 * add 11,0,11 # r11 = index * 12 = reloc offset.
8142 * bctr
8143 */
8144 static const unsigned int plt_resolve[] =
8145 {
8146 LIS_12,
8147 ADDIS_11_11,
8148 LWZ_0_12,
8149 ADDI_11_11,
8150 MTCTR_0,
8151 ADD_0_11_11,
8152 LWZ_12_12,
8153 ADD_11_0_11,
8154 BCTR,
8155 NOP,
8156 NOP,
8157 NOP,
8158 NOP,
8159 NOP,
8160 NOP,
8161 NOP
8162 };
8163
8164 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8165 abort ();
8166 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8167 abort ();
8168
8169 /* Build the branch table, one for each plt entry (less one),
8170 and perhaps some padding. */
8171 p = htab->glink->contents;
8172 p += htab->glink_pltresolve;
8173 endp = htab->glink->contents;
8174 endp += htab->glink->size - GLINK_PLTRESOLVE;
8175 while (p < endp - 8 * 4)
8176 {
8177 bfd_put_32 (output_bfd, B + endp - p, p);
8178 p += 4;
8179 }
8180 while (p < endp)
8181 {
8182 bfd_put_32 (output_bfd, NOP, p);
8183 p += 4;
8184 }
8185
8186 res0 = (htab->glink_pltresolve
8187 + htab->glink->output_section->vma
8188 + htab->glink->output_offset);
8189
8190 /* Last comes the PLTresolve stub. */
8191 if (info->shared || info->pie)
8192 {
8193 bfd_vma bcl;
8194
8195 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8196 {
8197 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8198 p += 4;
8199 }
8200 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8201
8202 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8203 + htab->glink->output_section->vma
8204 + htab->glink->output_offset);
8205
8206 bfd_put_32 (output_bfd,
8207 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8208 bfd_put_32 (output_bfd,
8209 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8210 bfd_put_32 (output_bfd,
8211 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8212 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8213 {
8214 bfd_put_32 (output_bfd,
8215 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8216 bfd_put_32 (output_bfd,
8217 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8218 }
8219 else
8220 {
8221 bfd_put_32 (output_bfd,
8222 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8223 bfd_put_32 (output_bfd,
8224 LWZ_12_12 + 4, p + 9*4);
8225 }
8226 }
8227 else
8228 {
8229 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8230 {
8231 bfd_put_32 (output_bfd, plt_resolve[i], p);
8232 p += 4;
8233 }
8234 p -= 4 * ARRAY_SIZE (plt_resolve);
8235
8236 bfd_put_32 (output_bfd,
8237 LIS_12 + PPC_HA (got + 4), p + 0*4);
8238 bfd_put_32 (output_bfd,
8239 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8240 bfd_put_32 (output_bfd,
8241 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8242 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8243 {
8244 bfd_put_32 (output_bfd,
8245 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8246 bfd_put_32 (output_bfd,
8247 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8248 }
8249 else
8250 {
8251 bfd_put_32 (output_bfd,
8252 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8253 bfd_put_32 (output_bfd,
8254 LWZ_12_12 + 4, p + 6*4);
8255 }
8256 }
8257 }
8258
8259 return ret;
8260 }
8261 \f
8262 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8263 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8264 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8265 #define TARGET_BIG_NAME "elf32-powerpc"
8266 #define ELF_ARCH bfd_arch_powerpc
8267 #define ELF_MACHINE_CODE EM_PPC
8268 #ifdef __QNXTARGET__
8269 #define ELF_MAXPAGESIZE 0x1000
8270 #else
8271 #define ELF_MAXPAGESIZE 0x10000
8272 #endif
8273 #define ELF_MINPAGESIZE 0x1000
8274 #define ELF_COMMONPAGESIZE 0x1000
8275 #define elf_info_to_howto ppc_elf_info_to_howto
8276
8277 #ifdef EM_CYGNUS_POWERPC
8278 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8279 #endif
8280
8281 #ifdef EM_PPC_OLD
8282 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8283 #endif
8284
8285 #define elf_backend_plt_not_loaded 1
8286 #define elf_backend_can_gc_sections 1
8287 #define elf_backend_can_refcount 1
8288 #define elf_backend_rela_normal 1
8289
8290 #define bfd_elf32_mkobject ppc_elf_mkobject
8291 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8292 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8293 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8294 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8295 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8296 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8297 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8298
8299 #define elf_backend_object_p ppc_elf_object_p
8300 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8301 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8302 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8303 #define elf_backend_relocate_section ppc_elf_relocate_section
8304 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8305 #define elf_backend_check_relocs ppc_elf_check_relocs
8306 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8307 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8308 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8309 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8310 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8311 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8312 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8313 #define elf_backend_fake_sections ppc_elf_fake_sections
8314 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8315 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8316 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8317 #define elf_backend_write_core_note ppc_elf_write_core_note
8318 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8319 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8320 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8321 #define elf_backend_write_section ppc_elf_write_section
8322 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8323 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8324 #define elf_backend_action_discarded ppc_elf_action_discarded
8325 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8326
8327 #include "elf32-target.h"
8328
8329 /* VxWorks Target */
8330
8331 #undef TARGET_LITTLE_SYM
8332 #undef TARGET_LITTLE_NAME
8333
8334 #undef TARGET_BIG_SYM
8335 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8336 #undef TARGET_BIG_NAME
8337 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8338
8339 /* VxWorks uses the elf default section flags for .plt. */
8340 static const struct bfd_elf_special_section *
8341 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8342 {
8343 if (sec->name == NULL)
8344 return NULL;
8345
8346 if (strcmp (sec->name, ".plt") == 0)
8347 return _bfd_elf_get_sec_type_attr (abfd, sec);
8348
8349 return ppc_elf_get_sec_type_attr (abfd, sec);
8350 }
8351
8352 /* Like ppc_elf_link_hash_table_create, but overrides
8353 appropriately for VxWorks. */
8354 static struct bfd_link_hash_table *
8355 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8356 {
8357 struct bfd_link_hash_table *ret;
8358
8359 ret = ppc_elf_link_hash_table_create (abfd);
8360 if (ret)
8361 {
8362 struct ppc_elf_link_hash_table *htab
8363 = (struct ppc_elf_link_hash_table *)ret;
8364 htab->is_vxworks = 1;
8365 htab->plt_type = PLT_VXWORKS;
8366 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8367 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8368 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8369 }
8370 return ret;
8371 }
8372
8373 /* Tweak magic VxWorks symbols as they are loaded. */
8374 static bfd_boolean
8375 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8376 struct bfd_link_info *info,
8377 Elf_Internal_Sym *sym,
8378 const char **namep ATTRIBUTE_UNUSED,
8379 flagword *flagsp ATTRIBUTE_UNUSED,
8380 asection **secp,
8381 bfd_vma *valp)
8382 {
8383 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8384 valp))
8385 return FALSE;
8386
8387 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8388 }
8389
8390 static void
8391 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8392 {
8393 ppc_elf_final_write_processing(abfd, linker);
8394 elf_vxworks_final_write_processing(abfd, linker);
8395 }
8396
8397 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8398 define it. */
8399 #undef elf_backend_want_plt_sym
8400 #define elf_backend_want_plt_sym 1
8401 #undef elf_backend_want_got_plt
8402 #define elf_backend_want_got_plt 1
8403 #undef elf_backend_got_symbol_offset
8404 #define elf_backend_got_symbol_offset 0
8405 #undef elf_backend_plt_not_loaded
8406 #define elf_backend_plt_not_loaded 0
8407 #undef elf_backend_plt_readonly
8408 #define elf_backend_plt_readonly 1
8409 #undef elf_backend_got_header_size
8410 #define elf_backend_got_header_size 12
8411
8412 #undef bfd_elf32_get_synthetic_symtab
8413
8414 #undef bfd_elf32_bfd_link_hash_table_create
8415 #define bfd_elf32_bfd_link_hash_table_create \
8416 ppc_elf_vxworks_link_hash_table_create
8417 #undef elf_backend_add_symbol_hook
8418 #define elf_backend_add_symbol_hook \
8419 ppc_elf_vxworks_add_symbol_hook
8420 #undef elf_backend_link_output_symbol_hook
8421 #define elf_backend_link_output_symbol_hook \
8422 elf_vxworks_link_output_symbol_hook
8423 #undef elf_backend_final_write_processing
8424 #define elf_backend_final_write_processing \
8425 ppc_elf_vxworks_final_write_processing
8426 #undef elf_backend_get_sec_type_attr
8427 #define elf_backend_get_sec_type_attr \
8428 ppc_elf_vxworks_get_sec_type_attr
8429 #undef elf_backend_emit_relocs
8430 #define elf_backend_emit_relocs \
8431 elf_vxworks_emit_relocs
8432
8433 #undef elf32_bed
8434 #define elf32_bed ppc_elf_vxworks_bed
8435
8436 #include "elf32-target.h"
GDB Binutils - Deliverables
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