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PR ld/11217
[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, 2010 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 #define TLS_GET_ADDR_GLINK_SIZE 12*4
65
66 /* VxWorks uses its own plt layout, filled in by the static linker. */
67
68 /* The standard VxWorks PLT entry. */
69 #define VXWORKS_PLT_ENTRY_SIZE 32
70 static const bfd_vma ppc_elf_vxworks_plt_entry
71 [VXWORKS_PLT_ENTRY_SIZE / 4] =
72 {
73 0x3d800000, /* lis r12,0 */
74 0x818c0000, /* lwz r12,0(r12) */
75 0x7d8903a6, /* mtctr r12 */
76 0x4e800420, /* bctr */
77 0x39600000, /* li r11,0 */
78 0x48000000, /* b 14 <.PLT0resolve+0x4> */
79 0x60000000, /* nop */
80 0x60000000, /* nop */
81 };
82 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
83 [VXWORKS_PLT_ENTRY_SIZE / 4] =
84 {
85 0x3d9e0000, /* addis r12,r30,0 */
86 0x818c0000, /* lwz r12,0(r12) */
87 0x7d8903a6, /* mtctr r12 */
88 0x4e800420, /* bctr */
89 0x39600000, /* li r11,0 */
90 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
91 0x60000000, /* nop */
92 0x60000000, /* nop */
93 };
94
95 /* The initial VxWorks PLT entry. */
96 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
97 static const bfd_vma ppc_elf_vxworks_plt0_entry
98 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
99 {
100 0x3d800000, /* lis r12,0 */
101 0x398c0000, /* addi r12,r12,0 */
102 0x800c0008, /* lwz r0,8(r12) */
103 0x7c0903a6, /* mtctr r0 */
104 0x818c0004, /* lwz r12,4(r12) */
105 0x4e800420, /* bctr */
106 0x60000000, /* nop */
107 0x60000000, /* nop */
108 };
109 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
110 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
111 {
112 0x819e0008, /* lwz r12,8(r30) */
113 0x7d8903a6, /* mtctr r12 */
114 0x819e0004, /* lwz r12,4(r30) */
115 0x4e800420, /* bctr */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 0x60000000, /* nop */
120 };
121
122 /* For executables, we have some additional relocations in
123 .rela.plt.unloaded, for the kernel loader. */
124
125 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
126 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
127 /* The number of relocations in the PLTResolve slot. */
128 #define VXWORKS_PLTRESOLVE_RELOCS 2
129 /* The number of relocations in the PLTResolve slot when when creating
130 a shared library. */
131 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
132
133 /* Some instructions. */
134 #define ADDIS_11_11 0x3d6b0000
135 #define ADDIS_11_30 0x3d7e0000
136 #define ADDIS_12_12 0x3d8c0000
137 #define ADDI_11_11 0x396b0000
138 #define ADD_0_11_11 0x7c0b5a14
139 #define ADD_3_12_2 0x7c6c1214
140 #define ADD_11_0_11 0x7d605a14
141 #define B 0x48000000
142 #define BCL_20_31 0x429f0005
143 #define BCTR 0x4e800420
144 #define BEQLR 0x4d820020
145 #define CMPWI_11_0 0x2c0b0000
146 #define LIS_11 0x3d600000
147 #define LIS_12 0x3d800000
148 #define LWZU_0_12 0x840c0000
149 #define LWZ_0_12 0x800c0000
150 #define LWZ_11_3 0x81630000
151 #define LWZ_11_11 0x816b0000
152 #define LWZ_11_30 0x817e0000
153 #define LWZ_12_3 0x81830000
154 #define LWZ_12_12 0x818c0000
155 #define MR_0_3 0x7c601b78
156 #define MR_3_0 0x7c030378
157 #define MFLR_0 0x7c0802a6
158 #define MFLR_12 0x7d8802a6
159 #define MTCTR_0 0x7c0903a6
160 #define MTCTR_11 0x7d6903a6
161 #define MTLR_0 0x7c0803a6
162 #define NOP 0x60000000
163 #define SUB_11_11_12 0x7d6c5850
164
165 /* Offset of tp and dtp pointers from start of TLS block. */
166 #define TP_OFFSET 0x7000
167 #define DTP_OFFSET 0x8000
168
169 /* The value of a defined global symbol. */
170 #define SYM_VAL(SYM) \
171 ((SYM)->root.u.def.section->output_section->vma \
172 + (SYM)->root.u.def.section->output_offset \
173 + (SYM)->root.u.def.value)
174 \f
175 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
176
177 static reloc_howto_type ppc_elf_howto_raw[] = {
178 /* This reloc does nothing. */
179 HOWTO (R_PPC_NONE, /* type */
180 0, /* rightshift */
181 2, /* size (0 = byte, 1 = short, 2 = long) */
182 32, /* bitsize */
183 FALSE, /* pc_relative */
184 0, /* bitpos */
185 complain_overflow_bitfield, /* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_PPC_NONE", /* name */
188 FALSE, /* partial_inplace */
189 0, /* src_mask */
190 0, /* dst_mask */
191 FALSE), /* pcrel_offset */
192
193 /* A standard 32 bit relocation. */
194 HOWTO (R_PPC_ADDR32, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 32, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC_ADDR32", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0xffffffff, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* An absolute 26 bit branch; the lower two bits must be zero.
209 FIXME: we don't check that, we just clear them. */
210 HOWTO (R_PPC_ADDR24, /* type */
211 0, /* rightshift */
212 2, /* size (0 = byte, 1 = short, 2 = long) */
213 26, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_bitfield, /* complain_on_overflow */
217 bfd_elf_generic_reloc, /* special_function */
218 "R_PPC_ADDR24", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0x3fffffc, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 /* A standard 16 bit relocation. */
225 HOWTO (R_PPC_ADDR16, /* type */
226 0, /* rightshift */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
228 16, /* bitsize */
229 FALSE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_bitfield, /* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_PPC_ADDR16", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 0xffff, /* dst_mask */
237 FALSE), /* pcrel_offset */
238
239 /* A 16 bit relocation without overflow. */
240 HOWTO (R_PPC_ADDR16_LO, /* type */
241 0, /* rightshift */
242 1, /* size (0 = byte, 1 = short, 2 = long) */
243 16, /* bitsize */
244 FALSE, /* pc_relative */
245 0, /* bitpos */
246 complain_overflow_dont,/* complain_on_overflow */
247 bfd_elf_generic_reloc, /* special_function */
248 "R_PPC_ADDR16_LO", /* name */
249 FALSE, /* partial_inplace */
250 0, /* src_mask */
251 0xffff, /* dst_mask */
252 FALSE), /* pcrel_offset */
253
254 /* The high order 16 bits of an address. */
255 HOWTO (R_PPC_ADDR16_HI, /* type */
256 16, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 FALSE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 bfd_elf_generic_reloc, /* special_function */
263 "R_PPC_ADDR16_HI", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* The high order 16 bits of an address, plus 1 if the contents of
270 the low 16 bits, treated as a signed number, is negative. */
271 HOWTO (R_PPC_ADDR16_HA, /* type */
272 16, /* rightshift */
273 1, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_dont, /* complain_on_overflow */
278 ppc_elf_addr16_ha_reloc, /* special_function */
279 "R_PPC_ADDR16_HA", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xffff, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch; the lower two bits must be zero.
286 FIXME: we don't check that, we just clear them. */
287 HOWTO (R_PPC_ADDR14, /* type */
288 0, /* rightshift */
289 2, /* size (0 = byte, 1 = short, 2 = long) */
290 16, /* bitsize */
291 FALSE, /* pc_relative */
292 0, /* bitpos */
293 complain_overflow_bitfield, /* complain_on_overflow */
294 bfd_elf_generic_reloc, /* special_function */
295 "R_PPC_ADDR14", /* name */
296 FALSE, /* partial_inplace */
297 0, /* src_mask */
298 0xfffc, /* dst_mask */
299 FALSE), /* pcrel_offset */
300
301 /* An absolute 16 bit branch, for which bit 10 should be set to
302 indicate that the branch is expected to be taken. The lower two
303 bits must be zero. */
304 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
305 0, /* rightshift */
306 2, /* size (0 = byte, 1 = short, 2 = long) */
307 16, /* bitsize */
308 FALSE, /* pc_relative */
309 0, /* bitpos */
310 complain_overflow_bitfield, /* complain_on_overflow */
311 bfd_elf_generic_reloc, /* special_function */
312 "R_PPC_ADDR14_BRTAKEN",/* name */
313 FALSE, /* partial_inplace */
314 0, /* src_mask */
315 0xfffc, /* dst_mask */
316 FALSE), /* pcrel_offset */
317
318 /* An absolute 16 bit branch, for which bit 10 should be set to
319 indicate that the branch is not expected to be taken. The lower
320 two bits must be zero. */
321 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
322 0, /* rightshift */
323 2, /* size (0 = byte, 1 = short, 2 = long) */
324 16, /* bitsize */
325 FALSE, /* pc_relative */
326 0, /* bitpos */
327 complain_overflow_bitfield, /* complain_on_overflow */
328 bfd_elf_generic_reloc, /* special_function */
329 "R_PPC_ADDR14_BRNTAKEN",/* name */
330 FALSE, /* partial_inplace */
331 0, /* src_mask */
332 0xfffc, /* dst_mask */
333 FALSE), /* pcrel_offset */
334
335 /* A relative 26 bit branch; the lower two bits must be zero. */
336 HOWTO (R_PPC_REL24, /* type */
337 0, /* rightshift */
338 2, /* size (0 = byte, 1 = short, 2 = long) */
339 26, /* bitsize */
340 TRUE, /* pc_relative */
341 0, /* bitpos */
342 complain_overflow_signed, /* complain_on_overflow */
343 bfd_elf_generic_reloc, /* special_function */
344 "R_PPC_REL24", /* name */
345 FALSE, /* partial_inplace */
346 0, /* src_mask */
347 0x3fffffc, /* dst_mask */
348 TRUE), /* pcrel_offset */
349
350 /* A relative 16 bit branch; the lower two bits must be zero. */
351 HOWTO (R_PPC_REL14, /* type */
352 0, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 16, /* bitsize */
355 TRUE, /* pc_relative */
356 0, /* bitpos */
357 complain_overflow_signed, /* complain_on_overflow */
358 bfd_elf_generic_reloc, /* special_function */
359 "R_PPC_REL14", /* name */
360 FALSE, /* partial_inplace */
361 0, /* src_mask */
362 0xfffc, /* dst_mask */
363 TRUE), /* pcrel_offset */
364
365 /* A relative 16 bit branch. Bit 10 should be set to indicate that
366 the branch is expected to be taken. The lower two bits must be
367 zero. */
368 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
369 0, /* rightshift */
370 2, /* size (0 = byte, 1 = short, 2 = long) */
371 16, /* bitsize */
372 TRUE, /* pc_relative */
373 0, /* bitpos */
374 complain_overflow_signed, /* complain_on_overflow */
375 bfd_elf_generic_reloc, /* special_function */
376 "R_PPC_REL14_BRTAKEN", /* name */
377 FALSE, /* partial_inplace */
378 0, /* src_mask */
379 0xfffc, /* dst_mask */
380 TRUE), /* pcrel_offset */
381
382 /* A relative 16 bit branch. Bit 10 should be set to indicate that
383 the branch is not expected to be taken. The lower two bits must
384 be zero. */
385 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
386 0, /* rightshift */
387 2, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 TRUE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_REL14_BRNTAKEN",/* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xfffc, /* dst_mask */
397 TRUE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
400 symbol. */
401 HOWTO (R_PPC_GOT16, /* type */
402 0, /* rightshift */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_signed, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_LO, /* type */
418 0, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_dont, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_LO", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HI, /* type */
434 16, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield, /* complain_on_overflow */
440 bfd_elf_generic_reloc, /* special_function */
441 "R_PPC_GOT16_HI", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
448 the symbol. */
449 HOWTO (R_PPC_GOT16_HA, /* type */
450 16, /* rightshift */
451 1, /* size (0 = byte, 1 = short, 2 = long) */
452 16, /* bitsize */
453 FALSE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_bitfield, /* complain_on_overflow */
456 ppc_elf_addr16_ha_reloc, /* special_function */
457 "R_PPC_GOT16_HA", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0xffff, /* dst_mask */
461 FALSE), /* pcrel_offset */
462
463 /* Like R_PPC_REL24, but referring to the procedure linkage table
464 entry for the symbol. */
465 HOWTO (R_PPC_PLTREL24, /* type */
466 0, /* rightshift */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
468 26, /* bitsize */
469 TRUE, /* pc_relative */
470 0, /* bitpos */
471 complain_overflow_signed, /* complain_on_overflow */
472 bfd_elf_generic_reloc, /* special_function */
473 "R_PPC_PLTREL24", /* name */
474 FALSE, /* partial_inplace */
475 0, /* src_mask */
476 0x3fffffc, /* dst_mask */
477 TRUE), /* pcrel_offset */
478
479 /* This is used only by the dynamic linker. The symbol should exist
480 both in the object being run and in some shared library. The
481 dynamic linker copies the data addressed by the symbol from the
482 shared library into the object, because the object being
483 run has to have the data at some particular address. */
484 HOWTO (R_PPC_COPY, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 32, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_PPC_COPY", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Like R_PPC_ADDR32, but used when setting global offset table
499 entries. */
500 HOWTO (R_PPC_GLOB_DAT, /* type */
501 0, /* rightshift */
502 2, /* size (0 = byte, 1 = short, 2 = long) */
503 32, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_bitfield, /* complain_on_overflow */
507 bfd_elf_generic_reloc, /* special_function */
508 "R_PPC_GLOB_DAT", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0xffffffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Marks a procedure linkage table entry for a symbol. */
515 HOWTO (R_PPC_JMP_SLOT, /* type */
516 0, /* rightshift */
517 2, /* size (0 = byte, 1 = short, 2 = long) */
518 32, /* bitsize */
519 FALSE, /* pc_relative */
520 0, /* bitpos */
521 complain_overflow_bitfield, /* complain_on_overflow */
522 bfd_elf_generic_reloc, /* special_function */
523 "R_PPC_JMP_SLOT", /* name */
524 FALSE, /* partial_inplace */
525 0, /* src_mask */
526 0, /* dst_mask */
527 FALSE), /* pcrel_offset */
528
529 /* Used only by the dynamic linker. When the object is run, this
530 longword is set to the load address of the object, plus the
531 addend. */
532 HOWTO (R_PPC_RELATIVE, /* type */
533 0, /* rightshift */
534 2, /* size (0 = byte, 1 = short, 2 = long) */
535 32, /* bitsize */
536 FALSE, /* pc_relative */
537 0, /* bitpos */
538 complain_overflow_bitfield, /* complain_on_overflow */
539 bfd_elf_generic_reloc, /* special_function */
540 "R_PPC_RELATIVE", /* name */
541 FALSE, /* partial_inplace */
542 0, /* src_mask */
543 0xffffffff, /* dst_mask */
544 FALSE), /* pcrel_offset */
545
546 /* Like R_PPC_REL24, but uses the value of the symbol within the
547 object rather than the final value. Normally used for
548 _GLOBAL_OFFSET_TABLE_. */
549 HOWTO (R_PPC_LOCAL24PC, /* type */
550 0, /* rightshift */
551 2, /* size (0 = byte, 1 = short, 2 = long) */
552 26, /* bitsize */
553 TRUE, /* pc_relative */
554 0, /* bitpos */
555 complain_overflow_signed, /* complain_on_overflow */
556 bfd_elf_generic_reloc, /* special_function */
557 "R_PPC_LOCAL24PC", /* name */
558 FALSE, /* partial_inplace */
559 0, /* src_mask */
560 0x3fffffc, /* dst_mask */
561 TRUE), /* pcrel_offset */
562
563 /* Like R_PPC_ADDR32, but may be unaligned. */
564 HOWTO (R_PPC_UADDR32, /* type */
565 0, /* rightshift */
566 2, /* size (0 = byte, 1 = short, 2 = long) */
567 32, /* bitsize */
568 FALSE, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_bitfield, /* complain_on_overflow */
571 bfd_elf_generic_reloc, /* special_function */
572 "R_PPC_UADDR32", /* name */
573 FALSE, /* partial_inplace */
574 0, /* src_mask */
575 0xffffffff, /* dst_mask */
576 FALSE), /* pcrel_offset */
577
578 /* Like R_PPC_ADDR16, but may be unaligned. */
579 HOWTO (R_PPC_UADDR16, /* type */
580 0, /* rightshift */
581 1, /* size (0 = byte, 1 = short, 2 = long) */
582 16, /* bitsize */
583 FALSE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_bitfield, /* complain_on_overflow */
586 bfd_elf_generic_reloc, /* special_function */
587 "R_PPC_UADDR16", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 0xffff, /* dst_mask */
591 FALSE), /* pcrel_offset */
592
593 /* 32-bit PC relative */
594 HOWTO (R_PPC_REL32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 TRUE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_REL32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0xffffffff, /* dst_mask */
606 TRUE), /* pcrel_offset */
607
608 /* 32-bit relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLT32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 FALSE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLT32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 FALSE), /* pcrel_offset */
623
624 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
625 FIXME: not supported. */
626 HOWTO (R_PPC_PLTREL32, /* type */
627 0, /* rightshift */
628 2, /* size (0 = byte, 1 = short, 2 = long) */
629 32, /* bitsize */
630 TRUE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_bitfield, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLTREL32", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0, /* dst_mask */
638 TRUE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_LO, /* type */
643 0, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_dont, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_LO", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HI, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_bitfield, /* complain_on_overflow */
665 bfd_elf_generic_reloc, /* special_function */
666 "R_PPC_PLT16_HI", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
673 the symbol. */
674 HOWTO (R_PPC_PLT16_HA, /* type */
675 16, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_bitfield, /* complain_on_overflow */
681 ppc_elf_addr16_ha_reloc, /* special_function */
682 "R_PPC_PLT16_HA", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
689 small data items. */
690 HOWTO (R_PPC_SDAREL16, /* type */
691 0, /* rightshift */
692 1, /* size (0 = byte, 1 = short, 2 = long) */
693 16, /* bitsize */
694 FALSE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_signed, /* complain_on_overflow */
697 bfd_elf_generic_reloc, /* special_function */
698 "R_PPC_SDAREL16", /* name */
699 FALSE, /* partial_inplace */
700 0, /* src_mask */
701 0xffff, /* dst_mask */
702 FALSE), /* pcrel_offset */
703
704 /* 16-bit section relative relocation. */
705 HOWTO (R_PPC_SECTOFF, /* type */
706 0, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_bitfield, /* complain_on_overflow */
712 bfd_elf_generic_reloc, /* special_function */
713 "R_PPC_SECTOFF", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* 16-bit lower half section relative relocation. */
720 HOWTO (R_PPC_SECTOFF_LO, /* type */
721 0, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_dont, /* complain_on_overflow */
727 bfd_elf_generic_reloc, /* special_function */
728 "R_PPC_SECTOFF_LO", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* 16-bit upper half section relative relocation. */
735 HOWTO (R_PPC_SECTOFF_HI, /* type */
736 16, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_bitfield, /* complain_on_overflow */
742 bfd_elf_generic_reloc, /* special_function */
743 "R_PPC_SECTOFF_HI", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* 16-bit upper half adjusted section relative relocation. */
750 HOWTO (R_PPC_SECTOFF_HA, /* type */
751 16, /* rightshift */
752 1, /* size (0 = byte, 1 = short, 2 = long) */
753 16, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_bitfield, /* complain_on_overflow */
757 ppc_elf_addr16_ha_reloc, /* special_function */
758 "R_PPC_SECTOFF_HA", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0xffff, /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 /* Marker relocs for TLS. */
765 HOWTO (R_PPC_TLS,
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 bfd_elf_generic_reloc, /* special_function */
773 "R_PPC_TLS", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 HOWTO (R_PPC_TLSGD,
780 0, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 32, /* bitsize */
783 FALSE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont, /* complain_on_overflow */
786 bfd_elf_generic_reloc, /* special_function */
787 "R_PPC_TLSGD", /* name */
788 FALSE, /* partial_inplace */
789 0, /* src_mask */
790 0, /* dst_mask */
791 FALSE), /* pcrel_offset */
792
793 HOWTO (R_PPC_TLSLD,
794 0, /* rightshift */
795 2, /* size (0 = byte, 1 = short, 2 = long) */
796 32, /* bitsize */
797 FALSE, /* pc_relative */
798 0, /* bitpos */
799 complain_overflow_dont, /* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 "R_PPC_TLSLD", /* name */
802 FALSE, /* partial_inplace */
803 0, /* src_mask */
804 0, /* dst_mask */
805 FALSE), /* pcrel_offset */
806
807 /* Computes the load module index of the load module that contains the
808 definition of its TLS sym. */
809 HOWTO (R_PPC_DTPMOD32,
810 0, /* rightshift */
811 2, /* size (0 = byte, 1 = short, 2 = long) */
812 32, /* bitsize */
813 FALSE, /* pc_relative */
814 0, /* bitpos */
815 complain_overflow_dont, /* complain_on_overflow */
816 ppc_elf_unhandled_reloc, /* special_function */
817 "R_PPC_DTPMOD32", /* name */
818 FALSE, /* partial_inplace */
819 0, /* src_mask */
820 0xffffffff, /* dst_mask */
821 FALSE), /* pcrel_offset */
822
823 /* Computes a dtv-relative displacement, the difference between the value
824 of sym+add and the base address of the thread-local storage block that
825 contains the definition of sym, minus 0x8000. */
826 HOWTO (R_PPC_DTPREL32,
827 0, /* rightshift */
828 2, /* size (0 = byte, 1 = short, 2 = long) */
829 32, /* bitsize */
830 FALSE, /* pc_relative */
831 0, /* bitpos */
832 complain_overflow_dont, /* complain_on_overflow */
833 ppc_elf_unhandled_reloc, /* special_function */
834 "R_PPC_DTPREL32", /* name */
835 FALSE, /* partial_inplace */
836 0, /* src_mask */
837 0xffffffff, /* dst_mask */
838 FALSE), /* pcrel_offset */
839
840 /* A 16 bit dtprel reloc. */
841 HOWTO (R_PPC_DTPREL16,
842 0, /* rightshift */
843 1, /* size (0 = byte, 1 = short, 2 = long) */
844 16, /* bitsize */
845 FALSE, /* pc_relative */
846 0, /* bitpos */
847 complain_overflow_signed, /* complain_on_overflow */
848 ppc_elf_unhandled_reloc, /* special_function */
849 "R_PPC_DTPREL16", /* name */
850 FALSE, /* partial_inplace */
851 0, /* src_mask */
852 0xffff, /* dst_mask */
853 FALSE), /* pcrel_offset */
854
855 /* Like DTPREL16, but no overflow. */
856 HOWTO (R_PPC_DTPREL16_LO,
857 0, /* rightshift */
858 1, /* size (0 = byte, 1 = short, 2 = long) */
859 16, /* bitsize */
860 FALSE, /* pc_relative */
861 0, /* bitpos */
862 complain_overflow_dont, /* complain_on_overflow */
863 ppc_elf_unhandled_reloc, /* special_function */
864 "R_PPC_DTPREL16_LO", /* name */
865 FALSE, /* partial_inplace */
866 0, /* src_mask */
867 0xffff, /* dst_mask */
868 FALSE), /* pcrel_offset */
869
870 /* Like DTPREL16_LO, but next higher group of 16 bits. */
871 HOWTO (R_PPC_DTPREL16_HI,
872 16, /* rightshift */
873 1, /* size (0 = byte, 1 = short, 2 = long) */
874 16, /* bitsize */
875 FALSE, /* pc_relative */
876 0, /* bitpos */
877 complain_overflow_dont, /* complain_on_overflow */
878 ppc_elf_unhandled_reloc, /* special_function */
879 "R_PPC_DTPREL16_HI", /* name */
880 FALSE, /* partial_inplace */
881 0, /* src_mask */
882 0xffff, /* dst_mask */
883 FALSE), /* pcrel_offset */
884
885 /* Like DTPREL16_HI, but adjust for low 16 bits. */
886 HOWTO (R_PPC_DTPREL16_HA,
887 16, /* rightshift */
888 1, /* size (0 = byte, 1 = short, 2 = long) */
889 16, /* bitsize */
890 FALSE, /* pc_relative */
891 0, /* bitpos */
892 complain_overflow_dont, /* complain_on_overflow */
893 ppc_elf_unhandled_reloc, /* special_function */
894 "R_PPC_DTPREL16_HA", /* name */
895 FALSE, /* partial_inplace */
896 0, /* src_mask */
897 0xffff, /* dst_mask */
898 FALSE), /* pcrel_offset */
899
900 /* Computes a tp-relative displacement, the difference between the value of
901 sym+add and the value of the thread pointer (r13). */
902 HOWTO (R_PPC_TPREL32,
903 0, /* rightshift */
904 2, /* size (0 = byte, 1 = short, 2 = long) */
905 32, /* bitsize */
906 FALSE, /* pc_relative */
907 0, /* bitpos */
908 complain_overflow_dont, /* complain_on_overflow */
909 ppc_elf_unhandled_reloc, /* special_function */
910 "R_PPC_TPREL32", /* name */
911 FALSE, /* partial_inplace */
912 0, /* src_mask */
913 0xffffffff, /* dst_mask */
914 FALSE), /* pcrel_offset */
915
916 /* A 16 bit tprel reloc. */
917 HOWTO (R_PPC_TPREL16,
918 0, /* rightshift */
919 1, /* size (0 = byte, 1 = short, 2 = long) */
920 16, /* bitsize */
921 FALSE, /* pc_relative */
922 0, /* bitpos */
923 complain_overflow_signed, /* complain_on_overflow */
924 ppc_elf_unhandled_reloc, /* special_function */
925 "R_PPC_TPREL16", /* name */
926 FALSE, /* partial_inplace */
927 0, /* src_mask */
928 0xffff, /* dst_mask */
929 FALSE), /* pcrel_offset */
930
931 /* Like TPREL16, but no overflow. */
932 HOWTO (R_PPC_TPREL16_LO,
933 0, /* rightshift */
934 1, /* size (0 = byte, 1 = short, 2 = long) */
935 16, /* bitsize */
936 FALSE, /* pc_relative */
937 0, /* bitpos */
938 complain_overflow_dont, /* complain_on_overflow */
939 ppc_elf_unhandled_reloc, /* special_function */
940 "R_PPC_TPREL16_LO", /* name */
941 FALSE, /* partial_inplace */
942 0, /* src_mask */
943 0xffff, /* dst_mask */
944 FALSE), /* pcrel_offset */
945
946 /* Like TPREL16_LO, but next higher group of 16 bits. */
947 HOWTO (R_PPC_TPREL16_HI,
948 16, /* rightshift */
949 1, /* size (0 = byte, 1 = short, 2 = long) */
950 16, /* bitsize */
951 FALSE, /* pc_relative */
952 0, /* bitpos */
953 complain_overflow_dont, /* complain_on_overflow */
954 ppc_elf_unhandled_reloc, /* special_function */
955 "R_PPC_TPREL16_HI", /* name */
956 FALSE, /* partial_inplace */
957 0, /* src_mask */
958 0xffff, /* dst_mask */
959 FALSE), /* pcrel_offset */
960
961 /* Like TPREL16_HI, but adjust for low 16 bits. */
962 HOWTO (R_PPC_TPREL16_HA,
963 16, /* rightshift */
964 1, /* size (0 = byte, 1 = short, 2 = long) */
965 16, /* bitsize */
966 FALSE, /* pc_relative */
967 0, /* bitpos */
968 complain_overflow_dont, /* complain_on_overflow */
969 ppc_elf_unhandled_reloc, /* special_function */
970 "R_PPC_TPREL16_HA", /* name */
971 FALSE, /* partial_inplace */
972 0, /* src_mask */
973 0xffff, /* dst_mask */
974 FALSE), /* pcrel_offset */
975
976 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
977 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
978 to the first entry. */
979 HOWTO (R_PPC_GOT_TLSGD16,
980 0, /* rightshift */
981 1, /* size (0 = byte, 1 = short, 2 = long) */
982 16, /* bitsize */
983 FALSE, /* pc_relative */
984 0, /* bitpos */
985 complain_overflow_signed, /* complain_on_overflow */
986 ppc_elf_unhandled_reloc, /* special_function */
987 "R_PPC_GOT_TLSGD16", /* name */
988 FALSE, /* partial_inplace */
989 0, /* src_mask */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
992
993 /* Like GOT_TLSGD16, but no overflow. */
994 HOWTO (R_PPC_GOT_TLSGD16_LO,
995 0, /* rightshift */
996 1, /* size (0 = byte, 1 = short, 2 = long) */
997 16, /* bitsize */
998 FALSE, /* pc_relative */
999 0, /* bitpos */
1000 complain_overflow_dont, /* complain_on_overflow */
1001 ppc_elf_unhandled_reloc, /* special_function */
1002 "R_PPC_GOT_TLSGD16_LO", /* name */
1003 FALSE, /* partial_inplace */
1004 0, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1007
1008 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1009 HOWTO (R_PPC_GOT_TLSGD16_HI,
1010 16, /* rightshift */
1011 1, /* size (0 = byte, 1 = short, 2 = long) */
1012 16, /* bitsize */
1013 FALSE, /* pc_relative */
1014 0, /* bitpos */
1015 complain_overflow_dont, /* complain_on_overflow */
1016 ppc_elf_unhandled_reloc, /* special_function */
1017 "R_PPC_GOT_TLSGD16_HI", /* name */
1018 FALSE, /* partial_inplace */
1019 0, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1022
1023 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1024 HOWTO (R_PPC_GOT_TLSGD16_HA,
1025 16, /* rightshift */
1026 1, /* size (0 = byte, 1 = short, 2 = long) */
1027 16, /* bitsize */
1028 FALSE, /* pc_relative */
1029 0, /* bitpos */
1030 complain_overflow_dont, /* complain_on_overflow */
1031 ppc_elf_unhandled_reloc, /* special_function */
1032 "R_PPC_GOT_TLSGD16_HA", /* name */
1033 FALSE, /* partial_inplace */
1034 0, /* src_mask */
1035 0xffff, /* dst_mask */
1036 FALSE), /* pcrel_offset */
1037
1038 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1039 with values (sym+add)@dtpmod and zero, and computes the offset to the
1040 first entry. */
1041 HOWTO (R_PPC_GOT_TLSLD16,
1042 0, /* rightshift */
1043 1, /* size (0 = byte, 1 = short, 2 = long) */
1044 16, /* bitsize */
1045 FALSE, /* pc_relative */
1046 0, /* bitpos */
1047 complain_overflow_signed, /* complain_on_overflow */
1048 ppc_elf_unhandled_reloc, /* special_function */
1049 "R_PPC_GOT_TLSLD16", /* name */
1050 FALSE, /* partial_inplace */
1051 0, /* src_mask */
1052 0xffff, /* dst_mask */
1053 FALSE), /* pcrel_offset */
1054
1055 /* Like GOT_TLSLD16, but no overflow. */
1056 HOWTO (R_PPC_GOT_TLSLD16_LO,
1057 0, /* rightshift */
1058 1, /* size (0 = byte, 1 = short, 2 = long) */
1059 16, /* bitsize */
1060 FALSE, /* pc_relative */
1061 0, /* bitpos */
1062 complain_overflow_dont, /* complain_on_overflow */
1063 ppc_elf_unhandled_reloc, /* special_function */
1064 "R_PPC_GOT_TLSLD16_LO", /* name */
1065 FALSE, /* partial_inplace */
1066 0, /* src_mask */
1067 0xffff, /* dst_mask */
1068 FALSE), /* pcrel_offset */
1069
1070 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1071 HOWTO (R_PPC_GOT_TLSLD16_HI,
1072 16, /* rightshift */
1073 1, /* size (0 = byte, 1 = short, 2 = long) */
1074 16, /* bitsize */
1075 FALSE, /* pc_relative */
1076 0, /* bitpos */
1077 complain_overflow_dont, /* complain_on_overflow */
1078 ppc_elf_unhandled_reloc, /* special_function */
1079 "R_PPC_GOT_TLSLD16_HI", /* name */
1080 FALSE, /* partial_inplace */
1081 0, /* src_mask */
1082 0xffff, /* dst_mask */
1083 FALSE), /* pcrel_offset */
1084
1085 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1086 HOWTO (R_PPC_GOT_TLSLD16_HA,
1087 16, /* rightshift */
1088 1, /* size (0 = byte, 1 = short, 2 = long) */
1089 16, /* bitsize */
1090 FALSE, /* pc_relative */
1091 0, /* bitpos */
1092 complain_overflow_dont, /* complain_on_overflow */
1093 ppc_elf_unhandled_reloc, /* special_function */
1094 "R_PPC_GOT_TLSLD16_HA", /* name */
1095 FALSE, /* partial_inplace */
1096 0, /* src_mask */
1097 0xffff, /* dst_mask */
1098 FALSE), /* pcrel_offset */
1099
1100 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1101 the offset to the entry. */
1102 HOWTO (R_PPC_GOT_DTPREL16,
1103 0, /* rightshift */
1104 1, /* size (0 = byte, 1 = short, 2 = long) */
1105 16, /* bitsize */
1106 FALSE, /* pc_relative */
1107 0, /* bitpos */
1108 complain_overflow_signed, /* complain_on_overflow */
1109 ppc_elf_unhandled_reloc, /* special_function */
1110 "R_PPC_GOT_DTPREL16", /* name */
1111 FALSE, /* partial_inplace */
1112 0, /* src_mask */
1113 0xffff, /* dst_mask */
1114 FALSE), /* pcrel_offset */
1115
1116 /* Like GOT_DTPREL16, but no overflow. */
1117 HOWTO (R_PPC_GOT_DTPREL16_LO,
1118 0, /* rightshift */
1119 1, /* size (0 = byte, 1 = short, 2 = long) */
1120 16, /* bitsize */
1121 FALSE, /* pc_relative */
1122 0, /* bitpos */
1123 complain_overflow_dont, /* complain_on_overflow */
1124 ppc_elf_unhandled_reloc, /* special_function */
1125 "R_PPC_GOT_DTPREL16_LO", /* name */
1126 FALSE, /* partial_inplace */
1127 0, /* src_mask */
1128 0xffff, /* dst_mask */
1129 FALSE), /* pcrel_offset */
1130
1131 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1132 HOWTO (R_PPC_GOT_DTPREL16_HI,
1133 16, /* rightshift */
1134 1, /* size (0 = byte, 1 = short, 2 = long) */
1135 16, /* bitsize */
1136 FALSE, /* pc_relative */
1137 0, /* bitpos */
1138 complain_overflow_dont, /* complain_on_overflow */
1139 ppc_elf_unhandled_reloc, /* special_function */
1140 "R_PPC_GOT_DTPREL16_HI", /* name */
1141 FALSE, /* partial_inplace */
1142 0, /* src_mask */
1143 0xffff, /* dst_mask */
1144 FALSE), /* pcrel_offset */
1145
1146 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1147 HOWTO (R_PPC_GOT_DTPREL16_HA,
1148 16, /* rightshift */
1149 1, /* size (0 = byte, 1 = short, 2 = long) */
1150 16, /* bitsize */
1151 FALSE, /* pc_relative */
1152 0, /* bitpos */
1153 complain_overflow_dont, /* complain_on_overflow */
1154 ppc_elf_unhandled_reloc, /* special_function */
1155 "R_PPC_GOT_DTPREL16_HA", /* name */
1156 FALSE, /* partial_inplace */
1157 0, /* src_mask */
1158 0xffff, /* dst_mask */
1159 FALSE), /* pcrel_offset */
1160
1161 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1162 offset to the entry. */
1163 HOWTO (R_PPC_GOT_TPREL16,
1164 0, /* rightshift */
1165 1, /* size (0 = byte, 1 = short, 2 = long) */
1166 16, /* bitsize */
1167 FALSE, /* pc_relative */
1168 0, /* bitpos */
1169 complain_overflow_signed, /* complain_on_overflow */
1170 ppc_elf_unhandled_reloc, /* special_function */
1171 "R_PPC_GOT_TPREL16", /* name */
1172 FALSE, /* partial_inplace */
1173 0, /* src_mask */
1174 0xffff, /* dst_mask */
1175 FALSE), /* pcrel_offset */
1176
1177 /* Like GOT_TPREL16, but no overflow. */
1178 HOWTO (R_PPC_GOT_TPREL16_LO,
1179 0, /* rightshift */
1180 1, /* size (0 = byte, 1 = short, 2 = long) */
1181 16, /* bitsize */
1182 FALSE, /* pc_relative */
1183 0, /* bitpos */
1184 complain_overflow_dont, /* complain_on_overflow */
1185 ppc_elf_unhandled_reloc, /* special_function */
1186 "R_PPC_GOT_TPREL16_LO", /* name */
1187 FALSE, /* partial_inplace */
1188 0, /* src_mask */
1189 0xffff, /* dst_mask */
1190 FALSE), /* pcrel_offset */
1191
1192 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1193 HOWTO (R_PPC_GOT_TPREL16_HI,
1194 16, /* rightshift */
1195 1, /* size (0 = byte, 1 = short, 2 = long) */
1196 16, /* bitsize */
1197 FALSE, /* pc_relative */
1198 0, /* bitpos */
1199 complain_overflow_dont, /* complain_on_overflow */
1200 ppc_elf_unhandled_reloc, /* special_function */
1201 "R_PPC_GOT_TPREL16_HI", /* name */
1202 FALSE, /* partial_inplace */
1203 0, /* src_mask */
1204 0xffff, /* dst_mask */
1205 FALSE), /* pcrel_offset */
1206
1207 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1208 HOWTO (R_PPC_GOT_TPREL16_HA,
1209 16, /* rightshift */
1210 1, /* size (0 = byte, 1 = short, 2 = long) */
1211 16, /* bitsize */
1212 FALSE, /* pc_relative */
1213 0, /* bitpos */
1214 complain_overflow_dont, /* complain_on_overflow */
1215 ppc_elf_unhandled_reloc, /* special_function */
1216 "R_PPC_GOT_TPREL16_HA", /* name */
1217 FALSE, /* partial_inplace */
1218 0, /* src_mask */
1219 0xffff, /* dst_mask */
1220 FALSE), /* pcrel_offset */
1221
1222 /* The remaining relocs are from the Embedded ELF ABI, and are not
1223 in the SVR4 ELF ABI. */
1224
1225 /* 32 bit value resulting from the addend minus the symbol. */
1226 HOWTO (R_PPC_EMB_NADDR32, /* type */
1227 0, /* rightshift */
1228 2, /* size (0 = byte, 1 = short, 2 = long) */
1229 32, /* bitsize */
1230 FALSE, /* pc_relative */
1231 0, /* bitpos */
1232 complain_overflow_bitfield, /* complain_on_overflow */
1233 bfd_elf_generic_reloc, /* special_function */
1234 "R_PPC_EMB_NADDR32", /* name */
1235 FALSE, /* partial_inplace */
1236 0, /* src_mask */
1237 0xffffffff, /* dst_mask */
1238 FALSE), /* pcrel_offset */
1239
1240 /* 16 bit value resulting from the addend minus the symbol. */
1241 HOWTO (R_PPC_EMB_NADDR16, /* type */
1242 0, /* rightshift */
1243 1, /* size (0 = byte, 1 = short, 2 = long) */
1244 16, /* bitsize */
1245 FALSE, /* pc_relative */
1246 0, /* bitpos */
1247 complain_overflow_bitfield, /* complain_on_overflow */
1248 bfd_elf_generic_reloc, /* special_function */
1249 "R_PPC_EMB_NADDR16", /* name */
1250 FALSE, /* partial_inplace */
1251 0, /* src_mask */
1252 0xffff, /* dst_mask */
1253 FALSE), /* pcrel_offset */
1254
1255 /* 16 bit value resulting from the addend minus the symbol. */
1256 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1257 0, /* rightshift */
1258 1, /* size (0 = byte, 1 = short, 2 = long) */
1259 16, /* bitsize */
1260 FALSE, /* pc_relative */
1261 0, /* bitpos */
1262 complain_overflow_dont,/* complain_on_overflow */
1263 bfd_elf_generic_reloc, /* special_function */
1264 "R_PPC_EMB_ADDR16_LO", /* name */
1265 FALSE, /* partial_inplace */
1266 0, /* src_mask */
1267 0xffff, /* dst_mask */
1268 FALSE), /* pcrel_offset */
1269
1270 /* The high order 16 bits of the addend minus the symbol. */
1271 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1272 16, /* rightshift */
1273 1, /* size (0 = byte, 1 = short, 2 = long) */
1274 16, /* bitsize */
1275 FALSE, /* pc_relative */
1276 0, /* bitpos */
1277 complain_overflow_dont, /* complain_on_overflow */
1278 bfd_elf_generic_reloc, /* special_function */
1279 "R_PPC_EMB_NADDR16_HI", /* name */
1280 FALSE, /* partial_inplace */
1281 0, /* src_mask */
1282 0xffff, /* dst_mask */
1283 FALSE), /* pcrel_offset */
1284
1285 /* The high order 16 bits of the result of the addend minus the address,
1286 plus 1 if the contents of the low 16 bits, treated as a signed number,
1287 is negative. */
1288 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1289 16, /* rightshift */
1290 1, /* size (0 = byte, 1 = short, 2 = long) */
1291 16, /* bitsize */
1292 FALSE, /* pc_relative */
1293 0, /* bitpos */
1294 complain_overflow_dont, /* complain_on_overflow */
1295 ppc_elf_addr16_ha_reloc, /* special_function */
1296 "R_PPC_EMB_NADDR16_HA", /* name */
1297 FALSE, /* partial_inplace */
1298 0, /* src_mask */
1299 0xffff, /* dst_mask */
1300 FALSE), /* pcrel_offset */
1301
1302 /* 16 bit value resulting from allocating a 4 byte word to hold an
1303 address in the .sdata section, and returning the offset from
1304 _SDA_BASE_ for that relocation. */
1305 HOWTO (R_PPC_EMB_SDAI16, /* type */
1306 0, /* rightshift */
1307 1, /* size (0 = byte, 1 = short, 2 = long) */
1308 16, /* bitsize */
1309 FALSE, /* pc_relative */
1310 0, /* bitpos */
1311 complain_overflow_signed, /* complain_on_overflow */
1312 bfd_elf_generic_reloc, /* special_function */
1313 "R_PPC_EMB_SDAI16", /* name */
1314 FALSE, /* partial_inplace */
1315 0, /* src_mask */
1316 0xffff, /* dst_mask */
1317 FALSE), /* pcrel_offset */
1318
1319 /* 16 bit value resulting from allocating a 4 byte word to hold an
1320 address in the .sdata2 section, and returning the offset from
1321 _SDA2_BASE_ for that relocation. */
1322 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1323 0, /* rightshift */
1324 1, /* size (0 = byte, 1 = short, 2 = long) */
1325 16, /* bitsize */
1326 FALSE, /* pc_relative */
1327 0, /* bitpos */
1328 complain_overflow_signed, /* complain_on_overflow */
1329 bfd_elf_generic_reloc, /* special_function */
1330 "R_PPC_EMB_SDA2I16", /* name */
1331 FALSE, /* partial_inplace */
1332 0, /* src_mask */
1333 0xffff, /* dst_mask */
1334 FALSE), /* pcrel_offset */
1335
1336 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1337 small data items. */
1338 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1339 0, /* rightshift */
1340 1, /* size (0 = byte, 1 = short, 2 = long) */
1341 16, /* bitsize */
1342 FALSE, /* pc_relative */
1343 0, /* bitpos */
1344 complain_overflow_signed, /* complain_on_overflow */
1345 bfd_elf_generic_reloc, /* special_function */
1346 "R_PPC_EMB_SDA2REL", /* name */
1347 FALSE, /* partial_inplace */
1348 0, /* src_mask */
1349 0xffff, /* dst_mask */
1350 FALSE), /* pcrel_offset */
1351
1352 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1353 signed offset from the appropriate base, and filling in the register
1354 field with the appropriate register (0, 2, or 13). */
1355 HOWTO (R_PPC_EMB_SDA21, /* type */
1356 0, /* rightshift */
1357 2, /* size (0 = byte, 1 = short, 2 = long) */
1358 16, /* bitsize */
1359 FALSE, /* pc_relative */
1360 0, /* bitpos */
1361 complain_overflow_signed, /* complain_on_overflow */
1362 bfd_elf_generic_reloc, /* special_function */
1363 "R_PPC_EMB_SDA21", /* name */
1364 FALSE, /* partial_inplace */
1365 0, /* src_mask */
1366 0xffff, /* dst_mask */
1367 FALSE), /* pcrel_offset */
1368
1369 /* Relocation not handled: R_PPC_EMB_MRKREF */
1370 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1371 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1372 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1373 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1374 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1375
1376 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1377 in the 16 bit signed offset from the appropriate base, and filling in the
1378 register field with the appropriate register (0, 2, or 13). */
1379 HOWTO (R_PPC_EMB_RELSDA, /* type */
1380 0, /* rightshift */
1381 1, /* size (0 = byte, 1 = short, 2 = long) */
1382 16, /* bitsize */
1383 TRUE, /* pc_relative */
1384 0, /* bitpos */
1385 complain_overflow_signed, /* complain_on_overflow */
1386 bfd_elf_generic_reloc, /* special_function */
1387 "R_PPC_EMB_RELSDA", /* name */
1388 FALSE, /* partial_inplace */
1389 0, /* src_mask */
1390 0xffff, /* dst_mask */
1391 FALSE), /* pcrel_offset */
1392
1393 HOWTO (R_PPC_IRELATIVE, /* type */
1394 0, /* rightshift */
1395 2, /* size (0 = byte, 1 = short, 2 = long) */
1396 32, /* bitsize */
1397 FALSE, /* pc_relative */
1398 0, /* bitpos */
1399 complain_overflow_bitfield, /* complain_on_overflow */
1400 bfd_elf_generic_reloc, /* special_function */
1401 "R_PPC_IRELATIVE", /* name */
1402 FALSE, /* partial_inplace */
1403 0, /* src_mask */
1404 0xffffffff, /* dst_mask */
1405 FALSE), /* pcrel_offset */
1406
1407 /* A 16 bit relative relocation. */
1408 HOWTO (R_PPC_REL16, /* type */
1409 0, /* rightshift */
1410 1, /* size (0 = byte, 1 = short, 2 = long) */
1411 16, /* bitsize */
1412 TRUE, /* pc_relative */
1413 0, /* bitpos */
1414 complain_overflow_bitfield, /* complain_on_overflow */
1415 bfd_elf_generic_reloc, /* special_function */
1416 "R_PPC_REL16", /* name */
1417 FALSE, /* partial_inplace */
1418 0, /* src_mask */
1419 0xffff, /* dst_mask */
1420 TRUE), /* pcrel_offset */
1421
1422 /* A 16 bit relative relocation without overflow. */
1423 HOWTO (R_PPC_REL16_LO, /* type */
1424 0, /* rightshift */
1425 1, /* size (0 = byte, 1 = short, 2 = long) */
1426 16, /* bitsize */
1427 TRUE, /* pc_relative */
1428 0, /* bitpos */
1429 complain_overflow_dont,/* complain_on_overflow */
1430 bfd_elf_generic_reloc, /* special_function */
1431 "R_PPC_REL16_LO", /* name */
1432 FALSE, /* partial_inplace */
1433 0, /* src_mask */
1434 0xffff, /* dst_mask */
1435 TRUE), /* pcrel_offset */
1436
1437 /* The high order 16 bits of a relative address. */
1438 HOWTO (R_PPC_REL16_HI, /* type */
1439 16, /* rightshift */
1440 1, /* size (0 = byte, 1 = short, 2 = long) */
1441 16, /* bitsize */
1442 TRUE, /* pc_relative */
1443 0, /* bitpos */
1444 complain_overflow_dont, /* complain_on_overflow */
1445 bfd_elf_generic_reloc, /* special_function */
1446 "R_PPC_REL16_HI", /* name */
1447 FALSE, /* partial_inplace */
1448 0, /* src_mask */
1449 0xffff, /* dst_mask */
1450 TRUE), /* pcrel_offset */
1451
1452 /* The high order 16 bits of a relative address, plus 1 if the contents of
1453 the low 16 bits, treated as a signed number, is negative. */
1454 HOWTO (R_PPC_REL16_HA, /* type */
1455 16, /* rightshift */
1456 1, /* size (0 = byte, 1 = short, 2 = long) */
1457 16, /* bitsize */
1458 TRUE, /* pc_relative */
1459 0, /* bitpos */
1460 complain_overflow_dont, /* complain_on_overflow */
1461 ppc_elf_addr16_ha_reloc, /* special_function */
1462 "R_PPC_REL16_HA", /* name */
1463 FALSE, /* partial_inplace */
1464 0, /* src_mask */
1465 0xffff, /* dst_mask */
1466 TRUE), /* pcrel_offset */
1467
1468 /* GNU extension to record C++ vtable hierarchy. */
1469 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1470 0, /* rightshift */
1471 0, /* size (0 = byte, 1 = short, 2 = long) */
1472 0, /* bitsize */
1473 FALSE, /* pc_relative */
1474 0, /* bitpos */
1475 complain_overflow_dont, /* complain_on_overflow */
1476 NULL, /* special_function */
1477 "R_PPC_GNU_VTINHERIT", /* name */
1478 FALSE, /* partial_inplace */
1479 0, /* src_mask */
1480 0, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1482
1483 /* GNU extension to record C++ vtable member usage. */
1484 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1485 0, /* rightshift */
1486 0, /* size (0 = byte, 1 = short, 2 = long) */
1487 0, /* bitsize */
1488 FALSE, /* pc_relative */
1489 0, /* bitpos */
1490 complain_overflow_dont, /* complain_on_overflow */
1491 NULL, /* special_function */
1492 "R_PPC_GNU_VTENTRY", /* name */
1493 FALSE, /* partial_inplace */
1494 0, /* src_mask */
1495 0, /* dst_mask */
1496 FALSE), /* pcrel_offset */
1497
1498 /* Phony reloc to handle AIX style TOC entries. */
1499 HOWTO (R_PPC_TOC16, /* type */
1500 0, /* rightshift */
1501 1, /* size (0 = byte, 1 = short, 2 = long) */
1502 16, /* bitsize */
1503 FALSE, /* pc_relative */
1504 0, /* bitpos */
1505 complain_overflow_signed, /* complain_on_overflow */
1506 bfd_elf_generic_reloc, /* special_function */
1507 "R_PPC_TOC16", /* name */
1508 FALSE, /* partial_inplace */
1509 0, /* src_mask */
1510 0xffff, /* dst_mask */
1511 FALSE), /* pcrel_offset */
1512 };
1513 \f
1514 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1515
1516 static void
1517 ppc_elf_howto_init (void)
1518 {
1519 unsigned int i, type;
1520
1521 for (i = 0;
1522 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1523 i++)
1524 {
1525 type = ppc_elf_howto_raw[i].type;
1526 if (type >= (sizeof (ppc_elf_howto_table)
1527 / sizeof (ppc_elf_howto_table[0])))
1528 abort ();
1529 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1530 }
1531 }
1532
1533 static reloc_howto_type *
1534 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1535 bfd_reloc_code_real_type code)
1536 {
1537 enum elf_ppc_reloc_type r;
1538
1539 /* Initialize howto table if not already done. */
1540 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1541 ppc_elf_howto_init ();
1542
1543 switch (code)
1544 {
1545 default:
1546 return NULL;
1547
1548 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1549 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1550 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1551 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1552 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1553 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1554 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1555 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1556 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1557 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1558 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1559 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1560 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1561 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1562 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1563 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1564 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1565 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1566 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1567 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1568 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1569 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1570 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1571 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1572 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1573 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1574 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1575 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1576 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1577 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1578 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1579 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1580 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1581 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1582 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1583 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1584 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1585 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1586 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1587 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1588 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1589 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1590 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1591 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1592 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1593 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1594 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1595 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1596 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1597 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1598 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1599 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1600 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1601 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1602 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1603 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1604 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1605 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1606 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1607 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1608 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1609 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1610 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1611 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1612 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1613 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1614 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1615 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1616 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1617 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1618 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1619 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1620 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1621 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1622 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1623 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1624 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1625 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1626 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1627 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1628 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1629 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1630 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1631 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1632 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1633 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1634 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1635 }
1636
1637 return ppc_elf_howto_table[r];
1638 };
1639
1640 static reloc_howto_type *
1641 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1642 const char *r_name)
1643 {
1644 unsigned int i;
1645
1646 for (i = 0;
1647 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1648 i++)
1649 if (ppc_elf_howto_raw[i].name != NULL
1650 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1651 return &ppc_elf_howto_raw[i];
1652
1653 return NULL;
1654 }
1655
1656 /* Set the howto pointer for a PowerPC ELF reloc. */
1657
1658 static void
1659 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1660 arelent *cache_ptr,
1661 Elf_Internal_Rela *dst)
1662 {
1663 /* Initialize howto table if not already done. */
1664 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1665 ppc_elf_howto_init ();
1666
1667 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1668 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1669
1670 /* Just because the above assert didn't trigger doesn't mean that
1671 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1672 if (!cache_ptr->howto)
1673 {
1674 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1675 abfd, ELF32_R_TYPE (dst->r_info));
1676 bfd_set_error (bfd_error_bad_value);
1677
1678 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1679 }
1680 }
1681
1682 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1683
1684 static bfd_reloc_status_type
1685 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1686 arelent *reloc_entry,
1687 asymbol *symbol,
1688 void *data ATTRIBUTE_UNUSED,
1689 asection *input_section,
1690 bfd *output_bfd,
1691 char **error_message ATTRIBUTE_UNUSED)
1692 {
1693 bfd_vma relocation;
1694
1695 if (output_bfd != NULL)
1696 {
1697 reloc_entry->address += input_section->output_offset;
1698 return bfd_reloc_ok;
1699 }
1700
1701 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1702 return bfd_reloc_outofrange;
1703
1704 if (bfd_is_com_section (symbol->section))
1705 relocation = 0;
1706 else
1707 relocation = symbol->value;
1708
1709 relocation += symbol->section->output_section->vma;
1710 relocation += symbol->section->output_offset;
1711 relocation += reloc_entry->addend;
1712 if (reloc_entry->howto->pc_relative)
1713 relocation -= reloc_entry->address;
1714
1715 reloc_entry->addend += (relocation & 0x8000) << 1;
1716
1717 return bfd_reloc_continue;
1718 }
1719
1720 static bfd_reloc_status_type
1721 ppc_elf_unhandled_reloc (bfd *abfd,
1722 arelent *reloc_entry,
1723 asymbol *symbol,
1724 void *data,
1725 asection *input_section,
1726 bfd *output_bfd,
1727 char **error_message)
1728 {
1729 /* If this is a relocatable link (output_bfd test tells us), just
1730 call the generic function. Any adjustment will be done at final
1731 link time. */
1732 if (output_bfd != NULL)
1733 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1734 input_section, output_bfd, error_message);
1735
1736 if (error_message != NULL)
1737 {
1738 static char buf[60];
1739 sprintf (buf, _("generic linker can't handle %s"),
1740 reloc_entry->howto->name);
1741 *error_message = buf;
1742 }
1743 return bfd_reloc_dangerous;
1744 }
1745 \f
1746 /* Sections created by the linker. */
1747
1748 typedef struct elf_linker_section
1749 {
1750 /* Pointer to the bfd section. */
1751 asection *section;
1752 /* Section name. */
1753 const char *name;
1754 /* Associated bss section name. */
1755 const char *bss_name;
1756 /* Associated symbol name. */
1757 const char *sym_name;
1758 /* Associated symbol. */
1759 struct elf_link_hash_entry *sym;
1760 } elf_linker_section_t;
1761
1762 /* Linked list of allocated pointer entries. This hangs off of the
1763 symbol lists, and provides allows us to return different pointers,
1764 based on different addend's. */
1765
1766 typedef struct elf_linker_section_pointers
1767 {
1768 /* next allocated pointer for this symbol */
1769 struct elf_linker_section_pointers *next;
1770 /* offset of pointer from beginning of section */
1771 bfd_vma offset;
1772 /* addend used */
1773 bfd_vma addend;
1774 /* which linker section this is */
1775 elf_linker_section_t *lsect;
1776 } elf_linker_section_pointers_t;
1777
1778 struct ppc_elf_obj_tdata
1779 {
1780 struct elf_obj_tdata elf;
1781
1782 /* A mapping from local symbols to offsets into the various linker
1783 sections added. This is index by the symbol index. */
1784 elf_linker_section_pointers_t **linker_section_pointers;
1785
1786 /* Flags used to auto-detect plt type. */
1787 unsigned int makes_plt_call : 1;
1788 unsigned int has_rel16 : 1;
1789 };
1790
1791 #define ppc_elf_tdata(bfd) \
1792 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1793
1794 #define elf_local_ptr_offsets(bfd) \
1795 (ppc_elf_tdata (bfd)->linker_section_pointers)
1796
1797 #define is_ppc_elf(bfd) \
1798 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1799 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1800
1801 /* Override the generic function because we store some extras. */
1802
1803 static bfd_boolean
1804 ppc_elf_mkobject (bfd *abfd)
1805 {
1806 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1807 PPC32_ELF_TDATA);
1808 }
1809
1810 /* Fix bad default arch selected for a 32 bit input bfd when the
1811 default is 64 bit. */
1812
1813 static bfd_boolean
1814 ppc_elf_object_p (bfd *abfd)
1815 {
1816 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1817 {
1818 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1819
1820 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1821 {
1822 /* Relies on arch after 64 bit default being 32 bit default. */
1823 abfd->arch_info = abfd->arch_info->next;
1824 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1825 }
1826 }
1827 return TRUE;
1828 }
1829
1830 /* Function to set whether a module needs the -mrelocatable bit set. */
1831
1832 static bfd_boolean
1833 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1834 {
1835 BFD_ASSERT (!elf_flags_init (abfd)
1836 || elf_elfheader (abfd)->e_flags == flags);
1837
1838 elf_elfheader (abfd)->e_flags = flags;
1839 elf_flags_init (abfd) = TRUE;
1840 return TRUE;
1841 }
1842
1843 /* Support for core dump NOTE sections. */
1844
1845 static bfd_boolean
1846 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1847 {
1848 int offset;
1849 unsigned int size;
1850
1851 switch (note->descsz)
1852 {
1853 default:
1854 return FALSE;
1855
1856 case 268: /* Linux/PPC. */
1857 /* pr_cursig */
1858 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1859
1860 /* pr_pid */
1861 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1862
1863 /* pr_reg */
1864 offset = 72;
1865 size = 192;
1866
1867 break;
1868 }
1869
1870 /* Make a ".reg/999" section. */
1871 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1872 size, note->descpos + offset);
1873 }
1874
1875 static bfd_boolean
1876 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1877 {
1878 switch (note->descsz)
1879 {
1880 default:
1881 return FALSE;
1882
1883 case 128: /* Linux/PPC elf_prpsinfo. */
1884 elf_tdata (abfd)->core_program
1885 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1886 elf_tdata (abfd)->core_command
1887 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1888 }
1889
1890 /* Note that for some reason, a spurious space is tacked
1891 onto the end of the args in some (at least one anyway)
1892 implementations, so strip it off if it exists. */
1893
1894 {
1895 char *command = elf_tdata (abfd)->core_command;
1896 int n = strlen (command);
1897
1898 if (0 < n && command[n - 1] == ' ')
1899 command[n - 1] = '\0';
1900 }
1901
1902 return TRUE;
1903 }
1904
1905 static char *
1906 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1907 {
1908 switch (note_type)
1909 {
1910 default:
1911 return NULL;
1912
1913 case NT_PRPSINFO:
1914 {
1915 char data[128];
1916 va_list ap;
1917
1918 va_start (ap, note_type);
1919 memset (data, 0, 32);
1920 strncpy (data + 32, va_arg (ap, const char *), 16);
1921 strncpy (data + 48, va_arg (ap, const char *), 80);
1922 va_end (ap);
1923 return elfcore_write_note (abfd, buf, bufsiz,
1924 "CORE", note_type, data, sizeof (data));
1925 }
1926
1927 case NT_PRSTATUS:
1928 {
1929 char data[268];
1930 va_list ap;
1931 long pid;
1932 int cursig;
1933 const void *greg;
1934
1935 va_start (ap, note_type);
1936 memset (data, 0, 72);
1937 pid = va_arg (ap, long);
1938 bfd_put_32 (abfd, pid, data + 24);
1939 cursig = va_arg (ap, int);
1940 bfd_put_16 (abfd, cursig, data + 12);
1941 greg = va_arg (ap, const void *);
1942 memcpy (data + 72, greg, 192);
1943 memset (data + 264, 0, 4);
1944 va_end (ap);
1945 return elfcore_write_note (abfd, buf, bufsiz,
1946 "CORE", note_type, data, sizeof (data));
1947 }
1948 }
1949 }
1950
1951 /* Return address for Ith PLT stub in section PLT, for relocation REL
1952 or (bfd_vma) -1 if it should not be included. */
1953
1954 static bfd_vma
1955 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1956 const asection *plt ATTRIBUTE_UNUSED,
1957 const arelent *rel)
1958 {
1959 return rel->address;
1960 }
1961
1962 /* Handle a PowerPC specific section when reading an object file. This
1963 is called when bfd_section_from_shdr finds a section with an unknown
1964 type. */
1965
1966 static bfd_boolean
1967 ppc_elf_section_from_shdr (bfd *abfd,
1968 Elf_Internal_Shdr *hdr,
1969 const char *name,
1970 int shindex)
1971 {
1972 asection *newsect;
1973 flagword flags;
1974
1975 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1976 return FALSE;
1977
1978 newsect = hdr->bfd_section;
1979 flags = bfd_get_section_flags (abfd, newsect);
1980 if (hdr->sh_flags & SHF_EXCLUDE)
1981 flags |= SEC_EXCLUDE;
1982
1983 if (hdr->sh_type == SHT_ORDERED)
1984 flags |= SEC_SORT_ENTRIES;
1985
1986 bfd_set_section_flags (abfd, newsect, flags);
1987 return TRUE;
1988 }
1989
1990 /* Set up any other section flags and such that may be necessary. */
1991
1992 static bfd_boolean
1993 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1994 Elf_Internal_Shdr *shdr,
1995 asection *asect)
1996 {
1997 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1998 shdr->sh_flags |= SHF_EXCLUDE;
1999
2000 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2001 shdr->sh_type = SHT_ORDERED;
2002
2003 return TRUE;
2004 }
2005
2006 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2007 need to bump up the number of section headers. */
2008
2009 static int
2010 ppc_elf_additional_program_headers (bfd *abfd,
2011 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2012 {
2013 asection *s;
2014 int ret = 0;
2015
2016 s = bfd_get_section_by_name (abfd, ".sbss2");
2017 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2018 ++ret;
2019
2020 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2021 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2022 ++ret;
2023
2024 return ret;
2025 }
2026
2027 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2028 .PPC.EMB.sbss0 a normal section, and not a bss section so
2029 that the linker doesn't crater when trying to make more than
2030 2 sections. */
2031
2032 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2033 {
2034 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2035 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2036 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2037 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2038 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2039 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2040 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2041 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2042 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2043 { NULL, 0, 0, 0, 0 }
2044 };
2045
2046 /* This is what we want for new plt/got. */
2047 static struct bfd_elf_special_section ppc_alt_plt =
2048 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2049
2050 static const struct bfd_elf_special_section *
2051 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2052 {
2053 const struct bfd_elf_special_section *ssect;
2054
2055 /* See if this is one of the special sections. */
2056 if (sec->name == NULL)
2057 return NULL;
2058
2059 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2060 sec->use_rela_p);
2061 if (ssect != NULL)
2062 {
2063 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2064 ssect = &ppc_alt_plt;
2065 return ssect;
2066 }
2067
2068 return _bfd_elf_get_sec_type_attr (abfd, sec);
2069 }
2070 \f
2071 /* Very simple linked list structure for recording apuinfo values. */
2072 typedef struct apuinfo_list
2073 {
2074 struct apuinfo_list *next;
2075 unsigned long value;
2076 }
2077 apuinfo_list;
2078
2079 static apuinfo_list *head;
2080
2081
2082 static void
2083 apuinfo_list_init (void)
2084 {
2085 head = NULL;
2086 }
2087
2088 static void
2089 apuinfo_list_add (unsigned long value)
2090 {
2091 apuinfo_list *entry = head;
2092
2093 while (entry != NULL)
2094 {
2095 if (entry->value == value)
2096 return;
2097 entry = entry->next;
2098 }
2099
2100 entry = bfd_malloc (sizeof (* entry));
2101 if (entry == NULL)
2102 return;
2103
2104 entry->value = value;
2105 entry->next = head;
2106 head = entry;
2107 }
2108
2109 static unsigned
2110 apuinfo_list_length (void)
2111 {
2112 apuinfo_list *entry;
2113 unsigned long count;
2114
2115 for (entry = head, count = 0;
2116 entry;
2117 entry = entry->next)
2118 ++ count;
2119
2120 return count;
2121 }
2122
2123 static inline unsigned long
2124 apuinfo_list_element (unsigned long number)
2125 {
2126 apuinfo_list * entry;
2127
2128 for (entry = head;
2129 entry && number --;
2130 entry = entry->next)
2131 ;
2132
2133 return entry ? entry->value : 0;
2134 }
2135
2136 static void
2137 apuinfo_list_finish (void)
2138 {
2139 apuinfo_list *entry;
2140
2141 for (entry = head; entry;)
2142 {
2143 apuinfo_list *next = entry->next;
2144 free (entry);
2145 entry = next;
2146 }
2147
2148 head = NULL;
2149 }
2150
2151 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2152 #define APUINFO_LABEL "APUinfo"
2153
2154 /* Scan the input BFDs and create a linked list of
2155 the APUinfo values that will need to be emitted. */
2156
2157 static void
2158 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2159 {
2160 bfd *ibfd;
2161 asection *asec;
2162 char *buffer;
2163 unsigned num_input_sections;
2164 bfd_size_type output_section_size;
2165 unsigned i;
2166 unsigned num_entries;
2167 unsigned long offset;
2168 unsigned long length;
2169 const char *error_message = NULL;
2170
2171 if (link_info == NULL)
2172 return;
2173
2174 /* Scan the input bfds, looking for apuinfo sections. */
2175 num_input_sections = 0;
2176 output_section_size = 0;
2177
2178 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2179 {
2180 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2181 if (asec)
2182 {
2183 ++ num_input_sections;
2184 output_section_size += asec->size;
2185 }
2186 }
2187
2188 /* We need at least one input sections
2189 in order to make merging worthwhile. */
2190 if (num_input_sections < 1)
2191 return;
2192
2193 /* Just make sure that the output section exists as well. */
2194 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2195 if (asec == NULL)
2196 return;
2197
2198 /* Allocate a buffer for the contents of the input sections. */
2199 buffer = bfd_malloc (output_section_size);
2200 if (buffer == NULL)
2201 return;
2202
2203 offset = 0;
2204 apuinfo_list_init ();
2205
2206 /* Read in the input sections contents. */
2207 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2208 {
2209 unsigned long datum;
2210 char *ptr;
2211
2212 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2213 if (asec == NULL)
2214 continue;
2215
2216 length = asec->size;
2217 if (length < 24)
2218 {
2219 error_message = _("corrupt or empty %s section in %B");
2220 goto fail;
2221 }
2222
2223 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2224 || (bfd_bread (buffer + offset, length, ibfd) != length))
2225 {
2226 error_message = _("unable to read in %s section from %B");
2227 goto fail;
2228 }
2229
2230 /* Process the contents of the section. */
2231 ptr = buffer + offset;
2232 error_message = _("corrupt %s section in %B");
2233
2234 /* Verify the contents of the header. Note - we have to
2235 extract the values this way in order to allow for a
2236 host whose endian-ness is different from the target. */
2237 datum = bfd_get_32 (ibfd, ptr);
2238 if (datum != sizeof APUINFO_LABEL)
2239 goto fail;
2240
2241 datum = bfd_get_32 (ibfd, ptr + 8);
2242 if (datum != 0x2)
2243 goto fail;
2244
2245 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2246 goto fail;
2247
2248 /* Get the number of bytes used for apuinfo entries. */
2249 datum = bfd_get_32 (ibfd, ptr + 4);
2250 if (datum + 20 != length)
2251 goto fail;
2252
2253 /* Make sure that we do not run off the end of the section. */
2254 if (offset + length > output_section_size)
2255 goto fail;
2256
2257 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2258 for (i = 0; i < datum; i += 4)
2259 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2260
2261 /* Update the offset. */
2262 offset += length;
2263 }
2264
2265 error_message = NULL;
2266
2267 /* Compute the size of the output section. */
2268 num_entries = apuinfo_list_length ();
2269 output_section_size = 20 + num_entries * 4;
2270
2271 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2272
2273 if (! bfd_set_section_size (abfd, asec, output_section_size))
2274 ibfd = abfd,
2275 error_message = _("warning: unable to set size of %s section in %B");
2276
2277 fail:
2278 free (buffer);
2279
2280 if (error_message)
2281 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2282 }
2283
2284 /* Prevent the output section from accumulating the input sections'
2285 contents. We have already stored this in our linked list structure. */
2286
2287 static bfd_boolean
2288 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2289 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2290 asection *asec,
2291 bfd_byte *contents ATTRIBUTE_UNUSED)
2292 {
2293 return (apuinfo_list_length ()
2294 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2295 }
2296
2297 /* Finally we can generate the output section. */
2298
2299 static void
2300 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2301 {
2302 bfd_byte *buffer;
2303 asection *asec;
2304 unsigned i;
2305 unsigned num_entries;
2306 bfd_size_type length;
2307
2308 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2309 if (asec == NULL)
2310 return;
2311
2312 if (apuinfo_list_length () == 0)
2313 return;
2314
2315 length = asec->size;
2316 if (length < 20)
2317 return;
2318
2319 buffer = bfd_malloc (length);
2320 if (buffer == NULL)
2321 {
2322 (*_bfd_error_handler)
2323 (_("failed to allocate space for new APUinfo section."));
2324 return;
2325 }
2326
2327 /* Create the apuinfo header. */
2328 num_entries = apuinfo_list_length ();
2329 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2330 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2331 bfd_put_32 (abfd, 0x2, buffer + 8);
2332 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2333
2334 length = 20;
2335 for (i = 0; i < num_entries; i++)
2336 {
2337 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2338 length += 4;
2339 }
2340
2341 if (length != asec->size)
2342 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2343
2344 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2345 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2346
2347 free (buffer);
2348
2349 apuinfo_list_finish ();
2350 }
2351 \f
2352 static bfd_boolean
2353 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2354 {
2355 bfd_byte buf[GLINK_ENTRY_SIZE];
2356
2357 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2358 return FALSE;
2359
2360 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2361 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2362 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2363 && bfd_get_32 (abfd, buf + 12) == BCTR);
2364 }
2365
2366 static bfd_boolean
2367 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2368 {
2369 bfd_vma vma = *(bfd_vma *) ptr;
2370 return ((section->flags & SEC_ALLOC) != 0
2371 && section->vma <= vma
2372 && vma < section->vma + section->size);
2373 }
2374
2375 static long
2376 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2377 long dynsymcount, asymbol **dynsyms,
2378 asymbol **ret)
2379 {
2380 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2381 asection *plt, *relplt, *dynamic, *glink;
2382 bfd_vma glink_vma = 0;
2383 bfd_vma resolv_vma = 0;
2384 bfd_vma stub_vma;
2385 asymbol *s;
2386 arelent *p;
2387 long count, i;
2388 size_t size;
2389 char *names;
2390 bfd_byte buf[4];
2391
2392 *ret = NULL;
2393
2394 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2395 return 0;
2396
2397 if (dynsymcount <= 0)
2398 return 0;
2399
2400 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2401 if (relplt == NULL)
2402 return 0;
2403
2404 plt = bfd_get_section_by_name (abfd, ".plt");
2405 if (plt == NULL)
2406 return 0;
2407
2408 /* Call common code to handle old-style executable PLTs. */
2409 if (elf_section_flags (plt) & SHF_EXECINSTR)
2410 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2411 dynsymcount, dynsyms, ret);
2412
2413 /* If this object was prelinked, the prelinker stored the address
2414 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2415 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2416 if (dynamic != NULL)
2417 {
2418 bfd_byte *dynbuf, *extdyn, *extdynend;
2419 size_t extdynsize;
2420 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2421
2422 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2423 return -1;
2424
2425 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2426 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2427
2428 extdyn = dynbuf;
2429 extdynend = extdyn + dynamic->size;
2430 for (; extdyn < extdynend; extdyn += extdynsize)
2431 {
2432 Elf_Internal_Dyn dyn;
2433 (*swap_dyn_in) (abfd, extdyn, &dyn);
2434
2435 if (dyn.d_tag == DT_NULL)
2436 break;
2437
2438 if (dyn.d_tag == DT_PPC_GOT)
2439 {
2440 unsigned int g_o_t = dyn.d_un.d_val;
2441 asection *got = bfd_get_section_by_name (abfd, ".got");
2442 if (got != NULL
2443 && bfd_get_section_contents (abfd, got, buf,
2444 g_o_t - got->vma + 4, 4))
2445 glink_vma = bfd_get_32 (abfd, buf);
2446 break;
2447 }
2448 }
2449 free (dynbuf);
2450 }
2451
2452 /* Otherwise we read the first plt entry. */
2453 if (glink_vma == 0)
2454 {
2455 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2456 glink_vma = bfd_get_32 (abfd, buf);
2457 }
2458
2459 if (glink_vma == 0)
2460 return 0;
2461
2462 /* The .glink section usually does not survive the final
2463 link; search for the section (usually .text) where the
2464 glink stubs now reside. */
2465 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2466 if (glink == NULL)
2467 return 0;
2468
2469 /* Determine glink PLT resolver by reading the relative branch
2470 from the first glink stub. */
2471 if (bfd_get_section_contents (abfd, glink, buf,
2472 glink_vma - glink->vma, 4))
2473 {
2474 unsigned int insn = bfd_get_32 (abfd, buf);
2475
2476 /* The first glink stub may either branch to the resolver ... */
2477 insn ^= B;
2478 if ((insn & ~0x3fffffc) == 0)
2479 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2480
2481 /* ... or fall through a bunch of NOPs. */
2482 else if ((insn ^ B ^ NOP) == 0)
2483 for (i = 4;
2484 bfd_get_section_contents (abfd, glink, buf,
2485 glink_vma - glink->vma + i, 4);
2486 i += 4)
2487 if (bfd_get_32 (abfd, buf) != NOP)
2488 {
2489 resolv_vma = glink_vma + i;
2490 break;
2491 }
2492 }
2493
2494 count = relplt->size / sizeof (Elf32_External_Rela);
2495 stub_vma = glink_vma - (bfd_vma) count * 16;
2496 /* If the stubs are those for -shared/-pie then we might have
2497 multiple stubs for each plt entry. If that is the case then
2498 there is no way to associate stubs with their plt entries short
2499 of figuring out the GOT pointer value used in the stub. */
2500 if (!is_nonpic_glink_stub (abfd, glink,
2501 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2502 return 0;
2503
2504 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2505 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2506 return -1;
2507
2508 size = count * sizeof (asymbol);
2509 p = relplt->relocation;
2510 for (i = 0; i < count; i++, p++)
2511 {
2512 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2513 if (p->addend != 0)
2514 size += sizeof ("+0x") - 1 + 8;
2515 }
2516
2517 size += sizeof (asymbol) + sizeof ("__glink");
2518
2519 if (resolv_vma)
2520 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2521
2522 s = *ret = bfd_malloc (size);
2523 if (s == NULL)
2524 return -1;
2525
2526 names = (char *) (s + count + 1 + (resolv_vma != 0));
2527 p = relplt->relocation;
2528 for (i = 0; i < count; i++, p++)
2529 {
2530 size_t len;
2531
2532 *s = **p->sym_ptr_ptr;
2533 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2534 we are defining a symbol, ensure one of them is set. */
2535 if ((s->flags & BSF_LOCAL) == 0)
2536 s->flags |= BSF_GLOBAL;
2537 s->flags |= BSF_SYNTHETIC;
2538 s->section = glink;
2539 s->value = stub_vma - glink->vma;
2540 s->name = names;
2541 s->udata.p = NULL;
2542 len = strlen ((*p->sym_ptr_ptr)->name);
2543 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2544 names += len;
2545 if (p->addend != 0)
2546 {
2547 memcpy (names, "+0x", sizeof ("+0x") - 1);
2548 names += sizeof ("+0x") - 1;
2549 bfd_sprintf_vma (abfd, names, p->addend);
2550 names += strlen (names);
2551 }
2552 memcpy (names, "@plt", sizeof ("@plt"));
2553 names += sizeof ("@plt");
2554 ++s;
2555 stub_vma += 16;
2556 }
2557
2558 /* Add a symbol at the start of the glink branch table. */
2559 memset (s, 0, sizeof *s);
2560 s->the_bfd = abfd;
2561 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2562 s->section = glink;
2563 s->value = glink_vma - glink->vma;
2564 s->name = names;
2565 memcpy (names, "__glink", sizeof ("__glink"));
2566 names += sizeof ("__glink");
2567 s++;
2568 count++;
2569
2570 if (resolv_vma)
2571 {
2572 /* Add a symbol for the glink PLT resolver. */
2573 memset (s, 0, sizeof *s);
2574 s->the_bfd = abfd;
2575 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2576 s->section = glink;
2577 s->value = resolv_vma - glink->vma;
2578 s->name = names;
2579 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2580 names += sizeof ("__glink_PLTresolve");
2581 s++;
2582 count++;
2583 }
2584
2585 return count;
2586 }
2587 \f
2588 /* The following functions are specific to the ELF linker, while
2589 functions above are used generally. They appear in this file more
2590 or less in the order in which they are called. eg.
2591 ppc_elf_check_relocs is called early in the link process,
2592 ppc_elf_finish_dynamic_sections is one of the last functions
2593 called. */
2594
2595 /* The PPC linker needs to keep track of the number of relocs that it
2596 decides to copy as dynamic relocs in check_relocs for each symbol.
2597 This is so that it can later discard them if they are found to be
2598 unnecessary. We store the information in a field extending the
2599 regular ELF linker hash table. */
2600
2601 struct ppc_elf_dyn_relocs
2602 {
2603 struct ppc_elf_dyn_relocs *next;
2604
2605 /* The input section of the reloc. */
2606 asection *sec;
2607
2608 /* Total number of relocs copied for the input section. */
2609 bfd_size_type count;
2610
2611 /* Number of pc-relative relocs copied for the input section. */
2612 bfd_size_type pc_count;
2613 };
2614
2615 /* Track PLT entries needed for a given symbol. We might need more
2616 than one glink entry per symbol when generating a pic binary. */
2617 struct plt_entry
2618 {
2619 struct plt_entry *next;
2620
2621 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2622 This field stores the offset into .got2 used to initialise the
2623 GOT pointer reg. It will always be at least 32768. (Current
2624 gcc always uses an offset of 32768, but ld -r will pack .got2
2625 sections together resulting in larger offsets). */
2626 bfd_vma addend;
2627
2628 /* The .got2 section. */
2629 asection *sec;
2630
2631 /* PLT refcount or offset. */
2632 union
2633 {
2634 bfd_signed_vma refcount;
2635 bfd_vma offset;
2636 } plt;
2637
2638 /* .glink stub offset. */
2639 bfd_vma glink_offset;
2640 };
2641
2642 /* Of those relocs that might be copied as dynamic relocs, this function
2643 selects those that must be copied when linking a shared library,
2644 even when the symbol is local. */
2645
2646 static int
2647 must_be_dyn_reloc (struct bfd_link_info *info,
2648 enum elf_ppc_reloc_type r_type)
2649 {
2650 switch (r_type)
2651 {
2652 default:
2653 return 1;
2654
2655 case R_PPC_REL24:
2656 case R_PPC_REL14:
2657 case R_PPC_REL14_BRTAKEN:
2658 case R_PPC_REL14_BRNTAKEN:
2659 case R_PPC_REL32:
2660 return 0;
2661
2662 case R_PPC_TPREL32:
2663 case R_PPC_TPREL16:
2664 case R_PPC_TPREL16_LO:
2665 case R_PPC_TPREL16_HI:
2666 case R_PPC_TPREL16_HA:
2667 return !info->executable;
2668 }
2669 }
2670
2671 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2672 copying dynamic variables from a shared lib into an app's dynbss
2673 section, and instead use a dynamic relocation to point into the
2674 shared lib. */
2675 #define ELIMINATE_COPY_RELOCS 1
2676
2677 /* PPC ELF linker hash entry. */
2678
2679 struct ppc_elf_link_hash_entry
2680 {
2681 struct elf_link_hash_entry elf;
2682
2683 /* If this symbol is used in the linker created sections, the processor
2684 specific backend uses this field to map the field into the offset
2685 from the beginning of the section. */
2686 elf_linker_section_pointers_t *linker_section_pointer;
2687
2688 /* Track dynamic relocs copied for this symbol. */
2689 struct ppc_elf_dyn_relocs *dyn_relocs;
2690
2691 /* Contexts in which symbol is used in the GOT (or TOC).
2692 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2693 corresponding relocs are encountered during check_relocs.
2694 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2695 indicate the corresponding GOT entry type is not needed. */
2696 #define TLS_GD 1 /* GD reloc. */
2697 #define TLS_LD 2 /* LD reloc. */
2698 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2699 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2700 #define TLS_TLS 16 /* Any TLS reloc. */
2701 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2702 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
2703 char tls_mask;
2704
2705 /* Nonzero if we have seen a small data relocation referring to this
2706 symbol. */
2707 unsigned char has_sda_refs;
2708 };
2709
2710 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2711
2712 /* PPC ELF linker hash table. */
2713
2714 struct ppc_elf_link_hash_table
2715 {
2716 struct elf_link_hash_table elf;
2717
2718 /* Short-cuts to get to dynamic linker sections. */
2719 asection *got;
2720 asection *relgot;
2721 asection *glink;
2722 asection *plt;
2723 asection *relplt;
2724 asection *iplt;
2725 asection *reliplt;
2726 asection *dynbss;
2727 asection *relbss;
2728 asection *dynsbss;
2729 asection *relsbss;
2730 elf_linker_section_t sdata[2];
2731 asection *sbss;
2732
2733 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2734 asection *srelplt2;
2735
2736 /* The .got.plt section (VxWorks only)*/
2737 asection *sgotplt;
2738
2739 /* Shortcut to __tls_get_addr. */
2740 struct elf_link_hash_entry *tls_get_addr;
2741
2742 /* The bfd that forced an old-style PLT. */
2743 bfd *old_bfd;
2744
2745 /* TLS local dynamic got entry handling. */
2746 union {
2747 bfd_signed_vma refcount;
2748 bfd_vma offset;
2749 } tlsld_got;
2750
2751 /* Offset of branch table to PltResolve function in glink. */
2752 bfd_vma glink_pltresolve;
2753
2754 /* Size of reserved GOT entries. */
2755 unsigned int got_header_size;
2756 /* Non-zero if allocating the header left a gap. */
2757 unsigned int got_gap;
2758
2759 /* The type of PLT we have chosen to use. */
2760 enum ppc_elf_plt_type plt_type;
2761
2762 /* Set if we should emit symbols for stubs. */
2763 unsigned int emit_stub_syms:1;
2764
2765 /* Set if __tls_get_addr optimization should not be done. */
2766 unsigned int no_tls_get_addr_opt:1;
2767
2768 /* True if the target system is VxWorks. */
2769 unsigned int is_vxworks:1;
2770
2771 /* The size of PLT entries. */
2772 int plt_entry_size;
2773 /* The distance between adjacent PLT slots. */
2774 int plt_slot_size;
2775 /* The size of the first PLT entry. */
2776 int plt_initial_entry_size;
2777
2778 /* Small local sym cache. */
2779 struct sym_cache sym_cache;
2780 };
2781
2782 /* Get the PPC ELF linker hash table from a link_info structure. */
2783
2784 #define ppc_elf_hash_table(p) \
2785 ((struct ppc_elf_link_hash_table *) (p)->hash)
2786
2787 /* Create an entry in a PPC ELF linker hash table. */
2788
2789 static struct bfd_hash_entry *
2790 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2791 struct bfd_hash_table *table,
2792 const char *string)
2793 {
2794 /* Allocate the structure if it has not already been allocated by a
2795 subclass. */
2796 if (entry == NULL)
2797 {
2798 entry = bfd_hash_allocate (table,
2799 sizeof (struct ppc_elf_link_hash_entry));
2800 if (entry == NULL)
2801 return entry;
2802 }
2803
2804 /* Call the allocation method of the superclass. */
2805 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2806 if (entry != NULL)
2807 {
2808 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2809 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2810 ppc_elf_hash_entry (entry)->tls_mask = 0;
2811 }
2812
2813 return entry;
2814 }
2815
2816 /* Create a PPC ELF linker hash table. */
2817
2818 static struct bfd_link_hash_table *
2819 ppc_elf_link_hash_table_create (bfd *abfd)
2820 {
2821 struct ppc_elf_link_hash_table *ret;
2822
2823 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2824 if (ret == NULL)
2825 return NULL;
2826
2827 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2828 ppc_elf_link_hash_newfunc,
2829 sizeof (struct ppc_elf_link_hash_entry)))
2830 {
2831 free (ret);
2832 return NULL;
2833 }
2834
2835 ret->elf.init_plt_refcount.refcount = 0;
2836 ret->elf.init_plt_refcount.glist = NULL;
2837 ret->elf.init_plt_offset.offset = 0;
2838 ret->elf.init_plt_offset.glist = NULL;
2839
2840 ret->sdata[0].name = ".sdata";
2841 ret->sdata[0].sym_name = "_SDA_BASE_";
2842 ret->sdata[0].bss_name = ".sbss";
2843
2844 ret->sdata[1].name = ".sdata2";
2845 ret->sdata[1].sym_name = "_SDA2_BASE_";
2846 ret->sdata[1].bss_name = ".sbss2";
2847
2848 ret->plt_entry_size = 12;
2849 ret->plt_slot_size = 8;
2850 ret->plt_initial_entry_size = 72;
2851
2852 return &ret->elf.root;
2853 }
2854
2855 /* Create .got and the related sections. */
2856
2857 static bfd_boolean
2858 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2859 {
2860 struct ppc_elf_link_hash_table *htab;
2861 asection *s;
2862 flagword flags;
2863
2864 if (!_bfd_elf_create_got_section (abfd, info))
2865 return FALSE;
2866
2867 htab = ppc_elf_hash_table (info);
2868 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2869 if (s == NULL)
2870 abort ();
2871
2872 if (htab->is_vxworks)
2873 {
2874 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2875 if (!htab->sgotplt)
2876 abort ();
2877 }
2878 else
2879 {
2880 /* The powerpc .got has a blrl instruction in it. Mark it
2881 executable. */
2882 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2883 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2884 if (!bfd_set_section_flags (abfd, s, flags))
2885 return FALSE;
2886 }
2887
2888 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2889 if (!htab->relgot)
2890 abort ();
2891
2892 return TRUE;
2893 }
2894
2895 static bfd_boolean
2896 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2897 {
2898 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2899 asection *s;
2900 flagword flags;
2901
2902 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2903 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2904 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2905 htab->glink = s;
2906 if (s == NULL
2907 || !bfd_set_section_alignment (abfd, s, 4))
2908 return FALSE;
2909
2910 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2911 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2912 htab->iplt = s;
2913 if (s == NULL
2914 || !bfd_set_section_alignment (abfd, s, 4))
2915 return FALSE;
2916
2917 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2918 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2919 s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags);
2920 htab->reliplt = s;
2921 if (s == NULL
2922 || ! bfd_set_section_alignment (abfd, s, 2))
2923 return FALSE;
2924 return TRUE;
2925 }
2926
2927 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2928 to output sections (just like _bfd_elf_create_dynamic_sections has
2929 to create .dynbss and .rela.bss). */
2930
2931 static bfd_boolean
2932 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2933 {
2934 struct ppc_elf_link_hash_table *htab;
2935 asection *s;
2936 flagword flags;
2937
2938 htab = ppc_elf_hash_table (info);
2939
2940 if (htab->got == NULL
2941 && !ppc_elf_create_got (abfd, info))
2942 return FALSE;
2943
2944 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2945 return FALSE;
2946
2947 if (htab->glink == NULL
2948 && !ppc_elf_create_glink (abfd, info))
2949 return FALSE;
2950
2951 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2952 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2953 SEC_ALLOC | SEC_LINKER_CREATED);
2954 htab->dynsbss = s;
2955 if (s == NULL)
2956 return FALSE;
2957
2958 if (! info->shared)
2959 {
2960 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2961 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2962 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2963 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2964 htab->relsbss = s;
2965 if (s == NULL
2966 || ! bfd_set_section_alignment (abfd, s, 2))
2967 return FALSE;
2968 }
2969
2970 if (htab->is_vxworks
2971 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2972 return FALSE;
2973
2974 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2975 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2976 if (s == NULL)
2977 abort ();
2978
2979 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2980 if (htab->plt_type == PLT_VXWORKS)
2981 /* The VxWorks PLT is a loaded section with contents. */
2982 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2983 return bfd_set_section_flags (abfd, s, flags);
2984 }
2985
2986 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2987
2988 static void
2989 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2990 struct elf_link_hash_entry *dir,
2991 struct elf_link_hash_entry *ind)
2992 {
2993 struct ppc_elf_link_hash_entry *edir, *eind;
2994
2995 edir = (struct ppc_elf_link_hash_entry *) dir;
2996 eind = (struct ppc_elf_link_hash_entry *) ind;
2997
2998 if (eind->dyn_relocs != NULL)
2999 {
3000 if (edir->dyn_relocs != NULL)
3001 {
3002 struct ppc_elf_dyn_relocs **pp;
3003 struct ppc_elf_dyn_relocs *p;
3004
3005 /* Add reloc counts against the indirect sym to the direct sym
3006 list. Merge any entries against the same section. */
3007 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3008 {
3009 struct ppc_elf_dyn_relocs *q;
3010
3011 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3012 if (q->sec == p->sec)
3013 {
3014 q->pc_count += p->pc_count;
3015 q->count += p->count;
3016 *pp = p->next;
3017 break;
3018 }
3019 if (q == NULL)
3020 pp = &p->next;
3021 }
3022 *pp = edir->dyn_relocs;
3023 }
3024
3025 edir->dyn_relocs = eind->dyn_relocs;
3026 eind->dyn_relocs = NULL;
3027 }
3028
3029 edir->tls_mask |= eind->tls_mask;
3030 edir->has_sda_refs |= eind->has_sda_refs;
3031
3032 /* If called to transfer flags for a weakdef during processing
3033 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3034 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3035 if (!(ELIMINATE_COPY_RELOCS
3036 && eind->elf.root.type != bfd_link_hash_indirect
3037 && edir->elf.dynamic_adjusted))
3038 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3039
3040 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3041 edir->elf.ref_regular |= eind->elf.ref_regular;
3042 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3043 edir->elf.needs_plt |= eind->elf.needs_plt;
3044 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3045
3046 /* If we were called to copy over info for a weak sym, that's all. */
3047 if (eind->elf.root.type != bfd_link_hash_indirect)
3048 return;
3049
3050 /* Copy over the GOT refcount entries that we may have already seen to
3051 the symbol which just became indirect. */
3052 edir->elf.got.refcount += eind->elf.got.refcount;
3053 eind->elf.got.refcount = 0;
3054
3055 /* And plt entries. */
3056 if (eind->elf.plt.plist != NULL)
3057 {
3058 if (edir->elf.plt.plist != NULL)
3059 {
3060 struct plt_entry **entp;
3061 struct plt_entry *ent;
3062
3063 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3064 {
3065 struct plt_entry *dent;
3066
3067 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3068 if (dent->sec == ent->sec && dent->addend == ent->addend)
3069 {
3070 dent->plt.refcount += ent->plt.refcount;
3071 *entp = ent->next;
3072 break;
3073 }
3074 if (dent == NULL)
3075 entp = &ent->next;
3076 }
3077 *entp = edir->elf.plt.plist;
3078 }
3079
3080 edir->elf.plt.plist = eind->elf.plt.plist;
3081 eind->elf.plt.plist = NULL;
3082 }
3083
3084 if (eind->elf.dynindx != -1)
3085 {
3086 if (edir->elf.dynindx != -1)
3087 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3088 edir->elf.dynstr_index);
3089 edir->elf.dynindx = eind->elf.dynindx;
3090 edir->elf.dynstr_index = eind->elf.dynstr_index;
3091 eind->elf.dynindx = -1;
3092 eind->elf.dynstr_index = 0;
3093 }
3094 }
3095
3096 /* Hook called by the linker routine which adds symbols from an object
3097 file. We use it to put .comm items in .sbss, and not .bss. */
3098
3099 static bfd_boolean
3100 ppc_elf_add_symbol_hook (bfd *abfd,
3101 struct bfd_link_info *info,
3102 Elf_Internal_Sym *sym,
3103 const char **namep ATTRIBUTE_UNUSED,
3104 flagword *flagsp ATTRIBUTE_UNUSED,
3105 asection **secp,
3106 bfd_vma *valp)
3107 {
3108 if (sym->st_shndx == SHN_COMMON
3109 && !info->relocatable
3110 && is_ppc_elf (info->output_bfd)
3111 && sym->st_size <= elf_gp_size (abfd))
3112 {
3113 /* Common symbols less than or equal to -G nn bytes are automatically
3114 put into .sbss. */
3115 struct ppc_elf_link_hash_table *htab;
3116
3117 htab = ppc_elf_hash_table (info);
3118 if (htab->sbss == NULL)
3119 {
3120 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3121
3122 if (!htab->elf.dynobj)
3123 htab->elf.dynobj = abfd;
3124
3125 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3126 ".sbss",
3127 flags);
3128 if (htab->sbss == NULL)
3129 return FALSE;
3130 }
3131
3132 *secp = htab->sbss;
3133 *valp = sym->st_size;
3134 }
3135
3136 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3137 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
3138
3139 return TRUE;
3140 }
3141 \f
3142 static bfd_boolean
3143 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3144 {
3145 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3146
3147 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3148 TRUE, FALSE, TRUE);
3149 if (lsect->sym == NULL)
3150 return FALSE;
3151 if (lsect->sym->root.type == bfd_link_hash_new)
3152 lsect->sym->non_elf = 0;
3153 lsect->sym->ref_regular = 1;
3154 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3155 return TRUE;
3156 }
3157
3158 /* Create a special linker section. */
3159
3160 static bfd_boolean
3161 ppc_elf_create_linker_section (bfd *abfd,
3162 struct bfd_link_info *info,
3163 flagword flags,
3164 elf_linker_section_t *lsect)
3165 {
3166 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3167 asection *s;
3168
3169 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3170 | SEC_LINKER_CREATED);
3171
3172 /* Record the first bfd that needs the special sections. */
3173 if (!htab->elf.dynobj)
3174 htab->elf.dynobj = abfd;
3175
3176 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3177 lsect->name,
3178 flags);
3179 if (s == NULL
3180 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3181 return FALSE;
3182 lsect->section = s;
3183
3184 return create_sdata_sym (info, lsect);
3185 }
3186
3187 /* Find a linker generated pointer with a given addend and type. */
3188
3189 static elf_linker_section_pointers_t *
3190 elf_find_pointer_linker_section
3191 (elf_linker_section_pointers_t *linker_pointers,
3192 bfd_vma addend,
3193 elf_linker_section_t *lsect)
3194 {
3195 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3196 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3197 return linker_pointers;
3198
3199 return NULL;
3200 }
3201
3202 /* Allocate a pointer to live in a linker created section. */
3203
3204 static bfd_boolean
3205 elf_create_pointer_linker_section (bfd *abfd,
3206 elf_linker_section_t *lsect,
3207 struct elf_link_hash_entry *h,
3208 const Elf_Internal_Rela *rel)
3209 {
3210 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3211 elf_linker_section_pointers_t *linker_section_ptr;
3212 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3213 bfd_size_type amt;
3214
3215 BFD_ASSERT (lsect != NULL);
3216
3217 /* Is this a global symbol? */
3218 if (h != NULL)
3219 {
3220 struct ppc_elf_link_hash_entry *eh;
3221
3222 /* Has this symbol already been allocated? If so, our work is done. */
3223 eh = (struct ppc_elf_link_hash_entry *) h;
3224 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3225 rel->r_addend,
3226 lsect))
3227 return TRUE;
3228
3229 ptr_linker_section_ptr = &eh->linker_section_pointer;
3230 }
3231 else
3232 {
3233 BFD_ASSERT (is_ppc_elf (abfd));
3234
3235 /* Allocation of a pointer to a local symbol. */
3236 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3237
3238 /* Allocate a table to hold the local symbols if first time. */
3239 if (!ptr)
3240 {
3241 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3242
3243 amt = num_symbols;
3244 amt *= sizeof (elf_linker_section_pointers_t *);
3245 ptr = bfd_zalloc (abfd, amt);
3246
3247 if (!ptr)
3248 return FALSE;
3249
3250 elf_local_ptr_offsets (abfd) = ptr;
3251 }
3252
3253 /* Has this symbol already been allocated? If so, our work is done. */
3254 if (elf_find_pointer_linker_section (ptr[r_symndx],
3255 rel->r_addend,
3256 lsect))
3257 return TRUE;
3258
3259 ptr_linker_section_ptr = &ptr[r_symndx];
3260 }
3261
3262 /* Allocate space for a pointer in the linker section, and allocate
3263 a new pointer record from internal memory. */
3264 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3265 amt = sizeof (elf_linker_section_pointers_t);
3266 linker_section_ptr = bfd_alloc (abfd, amt);
3267
3268 if (!linker_section_ptr)
3269 return FALSE;
3270
3271 linker_section_ptr->next = *ptr_linker_section_ptr;
3272 linker_section_ptr->addend = rel->r_addend;
3273 linker_section_ptr->lsect = lsect;
3274 *ptr_linker_section_ptr = linker_section_ptr;
3275
3276 linker_section_ptr->offset = lsect->section->size;
3277 lsect->section->size += 4;
3278
3279 #ifdef DEBUG
3280 fprintf (stderr,
3281 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3282 lsect->name, (long) linker_section_ptr->offset,
3283 (long) lsect->section->size);
3284 #endif
3285
3286 return TRUE;
3287 }
3288
3289 static struct plt_entry **
3290 update_local_sym_info (bfd *abfd,
3291 Elf_Internal_Shdr *symtab_hdr,
3292 unsigned long r_symndx,
3293 int tls_type)
3294 {
3295 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3296 struct plt_entry **local_plt;
3297 char *local_got_tls_masks;
3298
3299 if (local_got_refcounts == NULL)
3300 {
3301 bfd_size_type size = symtab_hdr->sh_info;
3302
3303 size *= (sizeof (*local_got_refcounts)
3304 + sizeof (*local_plt)
3305 + sizeof (*local_got_tls_masks));
3306 local_got_refcounts = bfd_zalloc (abfd, size);
3307 if (local_got_refcounts == NULL)
3308 return NULL;
3309 elf_local_got_refcounts (abfd) = local_got_refcounts;
3310 }
3311
3312 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3313 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3314 local_got_tls_masks[r_symndx] |= tls_type;
3315 if (tls_type != PLT_IFUNC)
3316 local_got_refcounts[r_symndx] += 1;
3317 return local_plt + r_symndx;
3318 }
3319
3320 static bfd_boolean
3321 update_plt_info (bfd *abfd, struct plt_entry **plist,
3322 asection *sec, bfd_vma addend)
3323 {
3324 struct plt_entry *ent;
3325
3326 if (addend < 32768)
3327 sec = NULL;
3328 for (ent = *plist; ent != NULL; ent = ent->next)
3329 if (ent->sec == sec && ent->addend == addend)
3330 break;
3331 if (ent == NULL)
3332 {
3333 bfd_size_type amt = sizeof (*ent);
3334 ent = bfd_alloc (abfd, amt);
3335 if (ent == NULL)
3336 return FALSE;
3337 ent->next = *plist;
3338 ent->sec = sec;
3339 ent->addend = addend;
3340 ent->plt.refcount = 0;
3341 *plist = ent;
3342 }
3343 ent->plt.refcount += 1;
3344 return TRUE;
3345 }
3346
3347 static struct plt_entry *
3348 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3349 {
3350 struct plt_entry *ent;
3351
3352 if (addend < 32768)
3353 sec = NULL;
3354 for (ent = *plist; ent != NULL; ent = ent->next)
3355 if (ent->sec == sec && ent->addend == addend)
3356 break;
3357 return ent;
3358 }
3359
3360 static bfd_boolean
3361 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3362 {
3363 return (r_type == R_PPC_PLTREL24
3364 || r_type == R_PPC_LOCAL24PC
3365 || r_type == R_PPC_REL24
3366 || r_type == R_PPC_REL14
3367 || r_type == R_PPC_REL14_BRTAKEN
3368 || r_type == R_PPC_REL14_BRNTAKEN
3369 || r_type == R_PPC_ADDR24
3370 || r_type == R_PPC_ADDR14
3371 || r_type == R_PPC_ADDR14_BRTAKEN
3372 || r_type == R_PPC_ADDR14_BRNTAKEN);
3373 }
3374
3375 static void
3376 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3377 {
3378 (*_bfd_error_handler)
3379 (_("%B: relocation %s cannot be used when making a shared object"),
3380 abfd,
3381 ppc_elf_howto_table[r_type]->name);
3382 bfd_set_error (bfd_error_bad_value);
3383 }
3384
3385 /* Look through the relocs for a section during the first phase, and
3386 allocate space in the global offset table or procedure linkage
3387 table. */
3388
3389 static bfd_boolean
3390 ppc_elf_check_relocs (bfd *abfd,
3391 struct bfd_link_info *info,
3392 asection *sec,
3393 const Elf_Internal_Rela *relocs)
3394 {
3395 struct ppc_elf_link_hash_table *htab;
3396 Elf_Internal_Shdr *symtab_hdr;
3397 struct elf_link_hash_entry **sym_hashes;
3398 const Elf_Internal_Rela *rel;
3399 const Elf_Internal_Rela *rel_end;
3400 asection *got2, *sreloc;
3401 struct elf_link_hash_entry *tga;
3402
3403 if (info->relocatable)
3404 return TRUE;
3405
3406 /* Don't do anything special with non-loaded, non-alloced sections.
3407 In particular, any relocs in such sections should not affect GOT
3408 and PLT reference counting (ie. we don't allow them to create GOT
3409 or PLT entries), there's no possibility or desire to optimize TLS
3410 relocs, and there's not much point in propagating relocs to shared
3411 libs that the dynamic linker won't relocate. */
3412 if ((sec->flags & SEC_ALLOC) == 0)
3413 return TRUE;
3414
3415 #ifdef DEBUG
3416 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3417 sec, abfd);
3418 #endif
3419
3420 BFD_ASSERT (is_ppc_elf (abfd));
3421
3422 /* Initialize howto table if not already done. */
3423 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3424 ppc_elf_howto_init ();
3425
3426 htab = ppc_elf_hash_table (info);
3427 if (htab->glink == NULL)
3428 {
3429 if (htab->elf.dynobj == NULL)
3430 htab->elf.dynobj = abfd;
3431 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3432 return FALSE;
3433 }
3434 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3435 FALSE, FALSE, TRUE);
3436 symtab_hdr = &elf_symtab_hdr (abfd);
3437 sym_hashes = elf_sym_hashes (abfd);
3438 got2 = bfd_get_section_by_name (abfd, ".got2");
3439 sreloc = NULL;
3440
3441 rel_end = relocs + sec->reloc_count;
3442 for (rel = relocs; rel < rel_end; rel++)
3443 {
3444 unsigned long r_symndx;
3445 enum elf_ppc_reloc_type r_type;
3446 struct elf_link_hash_entry *h;
3447 int tls_type;
3448 struct plt_entry **ifunc;
3449
3450 r_symndx = ELF32_R_SYM (rel->r_info);
3451 if (r_symndx < symtab_hdr->sh_info)
3452 h = NULL;
3453 else
3454 {
3455 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3456 while (h->root.type == bfd_link_hash_indirect
3457 || h->root.type == bfd_link_hash_warning)
3458 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3459 }
3460
3461 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3462 This shows up in particular in an R_PPC_ADDR32 in the eabi
3463 startup code. */
3464 if (h != NULL
3465 && htab->got == NULL
3466 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3467 {
3468 if (htab->elf.dynobj == NULL)
3469 htab->elf.dynobj = abfd;
3470 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3471 return FALSE;
3472 BFD_ASSERT (h == htab->elf.hgot);
3473 }
3474
3475 tls_type = 0;
3476 ifunc = NULL;
3477 r_type = ELF32_R_TYPE (rel->r_info);
3478 if (!htab->is_vxworks)
3479 {
3480 if (h != NULL)
3481 {
3482 if (h->type == STT_GNU_IFUNC)
3483 ifunc = &h->plt.plist;
3484 }
3485 else
3486 {
3487 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3488 abfd, r_symndx);
3489 if (isym == NULL)
3490 return FALSE;
3491
3492 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3493 && (!info->shared
3494 || is_branch_reloc (r_type)))
3495 {
3496 bfd_vma addend;
3497
3498 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3499 PLT_IFUNC);
3500 if (ifunc == NULL)
3501 return FALSE;
3502
3503 /* STT_GNU_IFUNC symbols must have a PLT entry;
3504 In a non-pie executable even when there are
3505 no plt calls. */
3506 addend = 0;
3507 if (r_type == R_PPC_PLTREL24)
3508 {
3509 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3510 if (info->shared)
3511 addend = rel->r_addend;
3512 }
3513 if (!update_plt_info (abfd, ifunc, got2, addend))
3514 return FALSE;
3515 }
3516 }
3517 }
3518
3519 if (!htab->is_vxworks
3520 && is_branch_reloc (r_type)
3521 && h != NULL
3522 && h == tga)
3523 {
3524 if (rel != relocs
3525 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3526 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3527 /* We have a new-style __tls_get_addr call with a marker
3528 reloc. */
3529 ;
3530 else
3531 /* Mark this section as having an old-style call. */
3532 sec->has_tls_get_addr_call = 1;
3533 }
3534
3535 switch (r_type)
3536 {
3537 case R_PPC_TLSGD:
3538 case R_PPC_TLSLD:
3539 /* These special tls relocs tie a call to __tls_get_addr with
3540 its parameter symbol. */
3541 break;
3542
3543 case R_PPC_GOT_TLSLD16:
3544 case R_PPC_GOT_TLSLD16_LO:
3545 case R_PPC_GOT_TLSLD16_HI:
3546 case R_PPC_GOT_TLSLD16_HA:
3547 tls_type = TLS_TLS | TLS_LD;
3548 goto dogottls;
3549
3550 case R_PPC_GOT_TLSGD16:
3551 case R_PPC_GOT_TLSGD16_LO:
3552 case R_PPC_GOT_TLSGD16_HI:
3553 case R_PPC_GOT_TLSGD16_HA:
3554 tls_type = TLS_TLS | TLS_GD;
3555 goto dogottls;
3556
3557 case R_PPC_GOT_TPREL16:
3558 case R_PPC_GOT_TPREL16_LO:
3559 case R_PPC_GOT_TPREL16_HI:
3560 case R_PPC_GOT_TPREL16_HA:
3561 if (!info->executable)
3562 info->flags |= DF_STATIC_TLS;
3563 tls_type = TLS_TLS | TLS_TPREL;
3564 goto dogottls;
3565
3566 case R_PPC_GOT_DTPREL16:
3567 case R_PPC_GOT_DTPREL16_LO:
3568 case R_PPC_GOT_DTPREL16_HI:
3569 case R_PPC_GOT_DTPREL16_HA:
3570 tls_type = TLS_TLS | TLS_DTPREL;
3571 dogottls:
3572 sec->has_tls_reloc = 1;
3573 /* Fall thru */
3574
3575 /* GOT16 relocations */
3576 case R_PPC_GOT16:
3577 case R_PPC_GOT16_LO:
3578 case R_PPC_GOT16_HI:
3579 case R_PPC_GOT16_HA:
3580 /* This symbol requires a global offset table entry. */
3581 if (htab->got == NULL)
3582 {
3583 if (htab->elf.dynobj == NULL)
3584 htab->elf.dynobj = abfd;
3585 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3586 return FALSE;
3587 }
3588 if (h != NULL)
3589 {
3590 h->got.refcount += 1;
3591 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3592 }
3593 else
3594 /* This is a global offset table entry for a local symbol. */
3595 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3596 return FALSE;
3597
3598 /* We may also need a plt entry if the symbol turns out to be
3599 an ifunc. */
3600 if (h != NULL && !info->shared)
3601 {
3602 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3603 return FALSE;
3604 }
3605 break;
3606
3607 /* Indirect .sdata relocation. */
3608 case R_PPC_EMB_SDAI16:
3609 if (info->shared)
3610 {
3611 bad_shared_reloc (abfd, r_type);
3612 return FALSE;
3613 }
3614 if (htab->sdata[0].section == NULL
3615 && !ppc_elf_create_linker_section (abfd, info, 0,
3616 &htab->sdata[0]))
3617 return FALSE;
3618 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3619 h, rel))
3620 return FALSE;
3621 if (h != NULL)
3622 {
3623 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3624 h->non_got_ref = TRUE;
3625 }
3626 break;
3627
3628 /* Indirect .sdata2 relocation. */
3629 case R_PPC_EMB_SDA2I16:
3630 if (info->shared)
3631 {
3632 bad_shared_reloc (abfd, r_type);
3633 return FALSE;
3634 }
3635 if (htab->sdata[1].section == NULL
3636 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3637 &htab->sdata[1]))
3638 return FALSE;
3639 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3640 h, rel))
3641 return FALSE;
3642 if (h != NULL)
3643 {
3644 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3645 h->non_got_ref = TRUE;
3646 }
3647 break;
3648
3649 case R_PPC_SDAREL16:
3650 if (htab->sdata[0].sym == NULL
3651 && !create_sdata_sym (info, &htab->sdata[0]))
3652 return FALSE;
3653 if (h != NULL)
3654 {
3655 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3656 h->non_got_ref = TRUE;
3657 }
3658 break;
3659
3660 case R_PPC_EMB_SDA2REL:
3661 if (info->shared)
3662 {
3663 bad_shared_reloc (abfd, r_type);
3664 return FALSE;
3665 }
3666 if (htab->sdata[1].sym == NULL
3667 && !create_sdata_sym (info, &htab->sdata[1]))
3668 return FALSE;
3669 if (h != NULL)
3670 {
3671 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3672 h->non_got_ref = TRUE;
3673 }
3674 break;
3675
3676 case R_PPC_EMB_SDA21:
3677 case R_PPC_EMB_RELSDA:
3678 if (info->shared)
3679 {
3680 bad_shared_reloc (abfd, r_type);
3681 return FALSE;
3682 }
3683 if (htab->sdata[0].sym == NULL
3684 && !create_sdata_sym (info, &htab->sdata[0]))
3685 return FALSE;
3686 if (htab->sdata[1].sym == NULL
3687 && !create_sdata_sym (info, &htab->sdata[1]))
3688 return FALSE;
3689 if (h != NULL)
3690 {
3691 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3692 h->non_got_ref = TRUE;
3693 }
3694 break;
3695
3696 case R_PPC_EMB_NADDR32:
3697 case R_PPC_EMB_NADDR16:
3698 case R_PPC_EMB_NADDR16_LO:
3699 case R_PPC_EMB_NADDR16_HI:
3700 case R_PPC_EMB_NADDR16_HA:
3701 if (info->shared)
3702 {
3703 bad_shared_reloc (abfd, r_type);
3704 return FALSE;
3705 }
3706 if (h != NULL)
3707 h->non_got_ref = TRUE;
3708 break;
3709
3710 case R_PPC_PLTREL24:
3711 if (h == NULL)
3712 break;
3713 /* Fall through */
3714 case R_PPC_PLT32:
3715 case R_PPC_PLTREL32:
3716 case R_PPC_PLT16_LO:
3717 case R_PPC_PLT16_HI:
3718 case R_PPC_PLT16_HA:
3719 #ifdef DEBUG
3720 fprintf (stderr, "Reloc requires a PLT entry\n");
3721 #endif
3722 /* This symbol requires a procedure linkage table entry. We
3723 actually build the entry in finish_dynamic_symbol,
3724 because this might be a case of linking PIC code without
3725 linking in any dynamic objects, in which case we don't
3726 need to generate a procedure linkage table after all. */
3727
3728 if (h == NULL)
3729 {
3730 /* It does not make sense to have a procedure linkage
3731 table entry for a local symbol. */
3732 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3733 "local symbol"),
3734 abfd,
3735 sec,
3736 (long) rel->r_offset,
3737 ppc_elf_howto_table[r_type]->name);
3738 bfd_set_error (bfd_error_bad_value);
3739 return FALSE;
3740 }
3741 else
3742 {
3743 bfd_vma addend = 0;
3744
3745 if (r_type == R_PPC_PLTREL24)
3746 {
3747 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3748 if (info->shared)
3749 addend = rel->r_addend;
3750 }
3751 h->needs_plt = 1;
3752 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
3753 return FALSE;
3754 }
3755 break;
3756
3757 /* The following relocations don't need to propagate the
3758 relocation if linking a shared object since they are
3759 section relative. */
3760 case R_PPC_SECTOFF:
3761 case R_PPC_SECTOFF_LO:
3762 case R_PPC_SECTOFF_HI:
3763 case R_PPC_SECTOFF_HA:
3764 case R_PPC_DTPREL16:
3765 case R_PPC_DTPREL16_LO:
3766 case R_PPC_DTPREL16_HI:
3767 case R_PPC_DTPREL16_HA:
3768 case R_PPC_TOC16:
3769 break;
3770
3771 case R_PPC_REL16:
3772 case R_PPC_REL16_LO:
3773 case R_PPC_REL16_HI:
3774 case R_PPC_REL16_HA:
3775 ppc_elf_tdata (abfd)->has_rel16 = 1;
3776 break;
3777
3778 /* These are just markers. */
3779 case R_PPC_TLS:
3780 case R_PPC_EMB_MRKREF:
3781 case R_PPC_NONE:
3782 case R_PPC_max:
3783 case R_PPC_RELAX:
3784 case R_PPC_RELAX_PLT:
3785 case R_PPC_RELAX_PLTREL24:
3786 break;
3787
3788 /* These should only appear in dynamic objects. */
3789 case R_PPC_COPY:
3790 case R_PPC_GLOB_DAT:
3791 case R_PPC_JMP_SLOT:
3792 case R_PPC_RELATIVE:
3793 case R_PPC_IRELATIVE:
3794 break;
3795
3796 /* These aren't handled yet. We'll report an error later. */
3797 case R_PPC_ADDR30:
3798 case R_PPC_EMB_RELSEC16:
3799 case R_PPC_EMB_RELST_LO:
3800 case R_PPC_EMB_RELST_HI:
3801 case R_PPC_EMB_RELST_HA:
3802 case R_PPC_EMB_BIT_FLD:
3803 break;
3804
3805 /* This refers only to functions defined in the shared library. */
3806 case R_PPC_LOCAL24PC:
3807 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3808 {
3809 htab->plt_type = PLT_OLD;
3810 htab->old_bfd = abfd;
3811 }
3812 break;
3813
3814 /* This relocation describes the C++ object vtable hierarchy.
3815 Reconstruct it for later use during GC. */
3816 case R_PPC_GNU_VTINHERIT:
3817 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3818 return FALSE;
3819 break;
3820
3821 /* This relocation describes which C++ vtable entries are actually
3822 used. Record for later use during GC. */
3823 case R_PPC_GNU_VTENTRY:
3824 BFD_ASSERT (h != NULL);
3825 if (h != NULL
3826 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3827 return FALSE;
3828 break;
3829
3830 /* We shouldn't really be seeing these. */
3831 case R_PPC_TPREL32:
3832 case R_PPC_TPREL16:
3833 case R_PPC_TPREL16_LO:
3834 case R_PPC_TPREL16_HI:
3835 case R_PPC_TPREL16_HA:
3836 if (!info->executable)
3837 info->flags |= DF_STATIC_TLS;
3838 goto dodyn;
3839
3840 /* Nor these. */
3841 case R_PPC_DTPMOD32:
3842 case R_PPC_DTPREL32:
3843 goto dodyn;
3844
3845 case R_PPC_REL32:
3846 if (h == NULL
3847 && got2 != NULL
3848 && (sec->flags & SEC_CODE) != 0
3849 && info->shared
3850 && htab->plt_type == PLT_UNSET)
3851 {
3852 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3853 the start of a function, which assembles to a REL32
3854 reference to .got2. If we detect one of these, then
3855 force the old PLT layout because the linker cannot
3856 reliably deduce the GOT pointer value needed for
3857 PLT call stubs. */
3858 asection *s;
3859 Elf_Internal_Sym *isym;
3860
3861 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3862 abfd, r_symndx);
3863 if (isym == NULL)
3864 return FALSE;
3865
3866 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3867 if (s == got2)
3868 {
3869 htab->plt_type = PLT_OLD;
3870 htab->old_bfd = abfd;
3871 }
3872 }
3873 if (h == NULL || h == htab->elf.hgot)
3874 break;
3875 /* fall through */
3876
3877 case R_PPC_ADDR32:
3878 case R_PPC_ADDR16:
3879 case R_PPC_ADDR16_LO:
3880 case R_PPC_ADDR16_HI:
3881 case R_PPC_ADDR16_HA:
3882 case R_PPC_UADDR32:
3883 case R_PPC_UADDR16:
3884 if (h != NULL && !info->shared)
3885 {
3886 /* We may need a plt entry if the symbol turns out to be
3887 a function defined in a dynamic object. */
3888 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3889 return FALSE;
3890
3891 /* We may need a copy reloc too. */
3892 h->non_got_ref = 1;
3893 h->pointer_equality_needed = 1;
3894 }
3895 goto dodyn;
3896
3897 case R_PPC_REL24:
3898 case R_PPC_REL14:
3899 case R_PPC_REL14_BRTAKEN:
3900 case R_PPC_REL14_BRNTAKEN:
3901 if (h == NULL)
3902 break;
3903 if (h == htab->elf.hgot)
3904 {
3905 if (htab->plt_type == PLT_UNSET)
3906 {
3907 htab->plt_type = PLT_OLD;
3908 htab->old_bfd = abfd;
3909 }
3910 break;
3911 }
3912 /* fall through */
3913
3914 case R_PPC_ADDR24:
3915 case R_PPC_ADDR14:
3916 case R_PPC_ADDR14_BRTAKEN:
3917 case R_PPC_ADDR14_BRNTAKEN:
3918 if (h != NULL && !info->shared)
3919 {
3920 /* We may need a plt entry if the symbol turns out to be
3921 a function defined in a dynamic object. */
3922 h->needs_plt = 1;
3923 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3924 return FALSE;
3925 break;
3926 }
3927
3928 dodyn:
3929 /* If we are creating a shared library, and this is a reloc
3930 against a global symbol, or a non PC relative reloc
3931 against a local symbol, then we need to copy the reloc
3932 into the shared library. However, if we are linking with
3933 -Bsymbolic, we do not need to copy a reloc against a
3934 global symbol which is defined in an object we are
3935 including in the link (i.e., DEF_REGULAR is set). At
3936 this point we have not seen all the input files, so it is
3937 possible that DEF_REGULAR is not set now but will be set
3938 later (it is never cleared). In case of a weak definition,
3939 DEF_REGULAR may be cleared later by a strong definition in
3940 a shared library. We account for that possibility below by
3941 storing information in the dyn_relocs field of the hash
3942 table entry. A similar situation occurs when creating
3943 shared libraries and symbol visibility changes render the
3944 symbol local.
3945
3946 If on the other hand, we are creating an executable, we
3947 may need to keep relocations for symbols satisfied by a
3948 dynamic library if we manage to avoid copy relocs for the
3949 symbol. */
3950 if ((info->shared
3951 && (must_be_dyn_reloc (info, r_type)
3952 || (h != NULL
3953 && (! info->symbolic
3954 || h->root.type == bfd_link_hash_defweak
3955 || !h->def_regular))))
3956 || (ELIMINATE_COPY_RELOCS
3957 && !info->shared
3958 && h != NULL
3959 && (h->root.type == bfd_link_hash_defweak
3960 || !h->def_regular)))
3961 {
3962 struct ppc_elf_dyn_relocs *p;
3963 struct ppc_elf_dyn_relocs **rel_head;
3964
3965 #ifdef DEBUG
3966 fprintf (stderr,
3967 "ppc_elf_check_relocs needs to "
3968 "create relocation for %s\n",
3969 (h && h->root.root.string
3970 ? h->root.root.string : "<unknown>"));
3971 #endif
3972 if (sreloc == NULL)
3973 {
3974 if (htab->elf.dynobj == NULL)
3975 htab->elf.dynobj = abfd;
3976
3977 sreloc = _bfd_elf_make_dynamic_reloc_section
3978 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3979
3980 if (sreloc == NULL)
3981 return FALSE;
3982 }
3983
3984 /* If this is a global symbol, we count the number of
3985 relocations we need for this symbol. */
3986 if (h != NULL)
3987 {
3988 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
3989 }
3990 else
3991 {
3992 /* Track dynamic relocs needed for local syms too.
3993 We really need local syms available to do this
3994 easily. Oh well. */
3995 asection *s;
3996 void *vpp;
3997 Elf_Internal_Sym *isym;
3998
3999 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4000 abfd, r_symndx);
4001 if (isym == NULL)
4002 return FALSE;
4003
4004 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4005 if (s == NULL)
4006 s = sec;
4007
4008 vpp = &elf_section_data (s)->local_dynrel;
4009 rel_head = (struct ppc_elf_dyn_relocs **) vpp;
4010 }
4011
4012 p = *rel_head;
4013 if (p == NULL || p->sec != sec)
4014 {
4015 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4016 if (p == NULL)
4017 return FALSE;
4018 p->next = *rel_head;
4019 *rel_head = p;
4020 p->sec = sec;
4021 p->count = 0;
4022 p->pc_count = 0;
4023 }
4024
4025 p->count += 1;
4026 if (!must_be_dyn_reloc (info, r_type))
4027 p->pc_count += 1;
4028 }
4029
4030 break;
4031 }
4032 }
4033
4034 return TRUE;
4035 }
4036 \f
4037
4038 /* Merge object attributes from IBFD into OBFD. Raise an error if
4039 there are conflicting attributes. */
4040 static bfd_boolean
4041 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4042 {
4043 obj_attribute *in_attr, *in_attrs;
4044 obj_attribute *out_attr, *out_attrs;
4045
4046 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4047 {
4048 /* This is the first object. Copy the attributes. */
4049 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4050
4051 /* Use the Tag_null value to indicate the attributes have been
4052 initialized. */
4053 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4054
4055 return TRUE;
4056 }
4057
4058 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4059 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4060
4061 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4062 non-conflicting ones. */
4063 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4064 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4065 if (in_attr->i != out_attr->i)
4066 {
4067 out_attr->type = 1;
4068 if (out_attr->i == 0)
4069 out_attr->i = in_attr->i;
4070 else if (in_attr->i == 0)
4071 ;
4072 else if (out_attr->i == 1 && in_attr->i == 2)
4073 _bfd_error_handler
4074 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4075 else if (out_attr->i == 1 && in_attr->i == 3)
4076 _bfd_error_handler
4077 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4078 obfd, ibfd);
4079 else if (out_attr->i == 3 && in_attr->i == 1)
4080 _bfd_error_handler
4081 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4082 ibfd, obfd);
4083 else if (out_attr->i == 3 && in_attr->i == 2)
4084 _bfd_error_handler
4085 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4086 ibfd, obfd);
4087 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4088 _bfd_error_handler
4089 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4090 else if (in_attr->i > 3)
4091 _bfd_error_handler
4092 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4093 in_attr->i);
4094 else
4095 _bfd_error_handler
4096 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4097 out_attr->i);
4098 }
4099
4100 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4101 merge non-conflicting ones. */
4102 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4103 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4104 if (in_attr->i != out_attr->i)
4105 {
4106 const char *in_abi = NULL, *out_abi = NULL;
4107
4108 switch (in_attr->i)
4109 {
4110 case 1: in_abi = "generic"; break;
4111 case 2: in_abi = "AltiVec"; break;
4112 case 3: in_abi = "SPE"; break;
4113 }
4114
4115 switch (out_attr->i)
4116 {
4117 case 1: out_abi = "generic"; break;
4118 case 2: out_abi = "AltiVec"; break;
4119 case 3: out_abi = "SPE"; break;
4120 }
4121
4122 out_attr->type = 1;
4123 if (out_attr->i == 0)
4124 out_attr->i = in_attr->i;
4125 else if (in_attr->i == 0)
4126 ;
4127 /* For now, allow generic to transition to AltiVec or SPE
4128 without a warning. If GCC marked files with their stack
4129 alignment and used don't-care markings for files which are
4130 not affected by the vector ABI, we could warn about this
4131 case too. */
4132 else if (out_attr->i == 1)
4133 out_attr->i = in_attr->i;
4134 else if (in_attr->i == 1)
4135 ;
4136 else if (in_abi == NULL)
4137 _bfd_error_handler
4138 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4139 in_attr->i);
4140 else if (out_abi == NULL)
4141 _bfd_error_handler
4142 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4143 in_attr->i);
4144 else
4145 _bfd_error_handler
4146 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4147 ibfd, obfd, in_abi, out_abi);
4148 }
4149
4150 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4151 and merge non-conflicting ones. */
4152 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4153 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4154 if (in_attr->i != out_attr->i)
4155 {
4156 out_attr->type = 1;
4157 if (out_attr->i == 0)
4158 out_attr->i = in_attr->i;
4159 else if (in_attr->i == 0)
4160 ;
4161 else if (out_attr->i == 1 && in_attr->i == 2)
4162 _bfd_error_handler
4163 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4164 else if (out_attr->i == 2 && in_attr->i == 1)
4165 _bfd_error_handler
4166 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4167 else if (in_attr->i > 2)
4168 _bfd_error_handler
4169 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4170 in_attr->i);
4171 else
4172 _bfd_error_handler
4173 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4174 out_attr->i);
4175 }
4176
4177 /* Merge Tag_compatibility attributes and any common GNU ones. */
4178 _bfd_elf_merge_object_attributes (ibfd, obfd);
4179
4180 return TRUE;
4181 }
4182
4183 /* Merge backend specific data from an object file to the output
4184 object file when linking. */
4185
4186 static bfd_boolean
4187 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4188 {
4189 flagword old_flags;
4190 flagword new_flags;
4191 bfd_boolean error;
4192
4193 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4194 return TRUE;
4195
4196 /* Check if we have the same endianess. */
4197 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4198 return FALSE;
4199
4200 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4201 return FALSE;
4202
4203 new_flags = elf_elfheader (ibfd)->e_flags;
4204 old_flags = elf_elfheader (obfd)->e_flags;
4205 if (!elf_flags_init (obfd))
4206 {
4207 /* First call, no flags set. */
4208 elf_flags_init (obfd) = TRUE;
4209 elf_elfheader (obfd)->e_flags = new_flags;
4210 }
4211
4212 /* Compatible flags are ok. */
4213 else if (new_flags == old_flags)
4214 ;
4215
4216 /* Incompatible flags. */
4217 else
4218 {
4219 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4220 to be linked with either. */
4221 error = FALSE;
4222 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4223 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4224 {
4225 error = TRUE;
4226 (*_bfd_error_handler)
4227 (_("%B: compiled with -mrelocatable and linked with "
4228 "modules compiled normally"), ibfd);
4229 }
4230 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4231 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4232 {
4233 error = TRUE;
4234 (*_bfd_error_handler)
4235 (_("%B: compiled normally and linked with "
4236 "modules compiled with -mrelocatable"), ibfd);
4237 }
4238
4239 /* The output is -mrelocatable-lib iff both the input files are. */
4240 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4241 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4242
4243 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4244 but each input file is either -mrelocatable or -mrelocatable-lib. */
4245 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4246 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4247 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4248 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4249
4250 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4251 any module uses it. */
4252 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4253
4254 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4255 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4256
4257 /* Warn about any other mismatches. */
4258 if (new_flags != old_flags)
4259 {
4260 error = TRUE;
4261 (*_bfd_error_handler)
4262 (_("%B: uses different e_flags (0x%lx) fields "
4263 "than previous modules (0x%lx)"),
4264 ibfd, (long) new_flags, (long) old_flags);
4265 }
4266
4267 if (error)
4268 {
4269 bfd_set_error (bfd_error_bad_value);
4270 return FALSE;
4271 }
4272 }
4273
4274 return TRUE;
4275 }
4276 \f
4277 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4278 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4279 int
4280 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4281 struct bfd_link_info *info,
4282 enum ppc_elf_plt_type plt_style,
4283 int emit_stub_syms)
4284 {
4285 struct ppc_elf_link_hash_table *htab;
4286 flagword flags;
4287
4288 htab = ppc_elf_hash_table (info);
4289
4290 htab->emit_stub_syms = emit_stub_syms;
4291
4292 if (htab->plt_type == PLT_UNSET)
4293 {
4294 if (plt_style == PLT_OLD)
4295 htab->plt_type = PLT_OLD;
4296 else
4297 {
4298 bfd *ibfd;
4299 enum ppc_elf_plt_type plt_type = plt_style;
4300
4301 /* Look through the reloc flags left by ppc_elf_check_relocs.
4302 Use the old style bss plt if a file makes plt calls
4303 without using the new relocs, and if ld isn't given
4304 --secure-plt and we never see REL16 relocs. */
4305 if (plt_type == PLT_UNSET)
4306 plt_type = PLT_OLD;
4307 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4308 if (is_ppc_elf (ibfd))
4309 {
4310 if (ppc_elf_tdata (ibfd)->has_rel16)
4311 plt_type = PLT_NEW;
4312 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4313 {
4314 plt_type = PLT_OLD;
4315 htab->old_bfd = ibfd;
4316 break;
4317 }
4318 }
4319 htab->plt_type = plt_type;
4320 }
4321 }
4322 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4323 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4324
4325 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4326
4327 if (htab->plt_type == PLT_NEW)
4328 {
4329 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4330 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4331
4332 /* The new PLT is a loaded section. */
4333 if (htab->plt != NULL
4334 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4335 return -1;
4336
4337 /* The new GOT is not executable. */
4338 if (htab->got != NULL
4339 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4340 return -1;
4341 }
4342 else
4343 {
4344 /* Stop an unused .glink section from affecting .text alignment. */
4345 if (htab->glink != NULL
4346 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4347 return -1;
4348 }
4349 return htab->plt_type == PLT_NEW;
4350 }
4351 \f
4352 /* Return the section that should be marked against GC for a given
4353 relocation. */
4354
4355 static asection *
4356 ppc_elf_gc_mark_hook (asection *sec,
4357 struct bfd_link_info *info,
4358 Elf_Internal_Rela *rel,
4359 struct elf_link_hash_entry *h,
4360 Elf_Internal_Sym *sym)
4361 {
4362 if (h != NULL)
4363 switch (ELF32_R_TYPE (rel->r_info))
4364 {
4365 case R_PPC_GNU_VTINHERIT:
4366 case R_PPC_GNU_VTENTRY:
4367 return NULL;
4368 }
4369
4370 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4371 }
4372
4373 /* Update the got, plt and dynamic reloc reference counts for the
4374 section being removed. */
4375
4376 static bfd_boolean
4377 ppc_elf_gc_sweep_hook (bfd *abfd,
4378 struct bfd_link_info *info,
4379 asection *sec,
4380 const Elf_Internal_Rela *relocs)
4381 {
4382 struct ppc_elf_link_hash_table *htab;
4383 Elf_Internal_Shdr *symtab_hdr;
4384 struct elf_link_hash_entry **sym_hashes;
4385 bfd_signed_vma *local_got_refcounts;
4386 const Elf_Internal_Rela *rel, *relend;
4387 asection *got2;
4388
4389 if (info->relocatable)
4390 return TRUE;
4391
4392 if ((sec->flags & SEC_ALLOC) == 0)
4393 return TRUE;
4394
4395 elf_section_data (sec)->local_dynrel = NULL;
4396
4397 htab = ppc_elf_hash_table (info);
4398 symtab_hdr = &elf_symtab_hdr (abfd);
4399 sym_hashes = elf_sym_hashes (abfd);
4400 local_got_refcounts = elf_local_got_refcounts (abfd);
4401 got2 = bfd_get_section_by_name (abfd, ".got2");
4402
4403 relend = relocs + sec->reloc_count;
4404 for (rel = relocs; rel < relend; rel++)
4405 {
4406 unsigned long r_symndx;
4407 enum elf_ppc_reloc_type r_type;
4408 struct elf_link_hash_entry *h = NULL;
4409
4410 r_symndx = ELF32_R_SYM (rel->r_info);
4411 if (r_symndx >= symtab_hdr->sh_info)
4412 {
4413 struct ppc_elf_dyn_relocs **pp, *p;
4414 struct ppc_elf_link_hash_entry *eh;
4415
4416 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4417 while (h->root.type == bfd_link_hash_indirect
4418 || h->root.type == bfd_link_hash_warning)
4419 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4420 eh = (struct ppc_elf_link_hash_entry *) h;
4421
4422 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4423 if (p->sec == sec)
4424 {
4425 /* Everything must go for SEC. */
4426 *pp = p->next;
4427 break;
4428 }
4429 }
4430
4431 r_type = ELF32_R_TYPE (rel->r_info);
4432 if (!htab->is_vxworks
4433 && h == NULL
4434 && local_got_refcounts != NULL
4435 && (!info->shared
4436 || is_branch_reloc (r_type)))
4437 {
4438 struct plt_entry **local_plt = (struct plt_entry **)
4439 (local_got_refcounts + symtab_hdr->sh_info);
4440 char *local_got_tls_masks = (char *)
4441 (local_plt + symtab_hdr->sh_info);
4442 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4443 {
4444 struct plt_entry **ifunc = local_plt + r_symndx;
4445 bfd_vma addend = 0;
4446 struct plt_entry *ent;
4447
4448 if (r_type == R_PPC_PLTREL24 && info->shared)
4449 addend = rel->r_addend;
4450 ent = find_plt_ent (ifunc, got2, addend);
4451 if (ent->plt.refcount > 0)
4452 ent->plt.refcount -= 1;
4453 continue;
4454 }
4455 }
4456
4457 switch (r_type)
4458 {
4459 case R_PPC_GOT_TLSLD16:
4460 case R_PPC_GOT_TLSLD16_LO:
4461 case R_PPC_GOT_TLSLD16_HI:
4462 case R_PPC_GOT_TLSLD16_HA:
4463 case R_PPC_GOT_TLSGD16:
4464 case R_PPC_GOT_TLSGD16_LO:
4465 case R_PPC_GOT_TLSGD16_HI:
4466 case R_PPC_GOT_TLSGD16_HA:
4467 case R_PPC_GOT_TPREL16:
4468 case R_PPC_GOT_TPREL16_LO:
4469 case R_PPC_GOT_TPREL16_HI:
4470 case R_PPC_GOT_TPREL16_HA:
4471 case R_PPC_GOT_DTPREL16:
4472 case R_PPC_GOT_DTPREL16_LO:
4473 case R_PPC_GOT_DTPREL16_HI:
4474 case R_PPC_GOT_DTPREL16_HA:
4475 case R_PPC_GOT16:
4476 case R_PPC_GOT16_LO:
4477 case R_PPC_GOT16_HI:
4478 case R_PPC_GOT16_HA:
4479 if (h != NULL)
4480 {
4481 if (h->got.refcount > 0)
4482 h->got.refcount--;
4483 if (!info->shared)
4484 {
4485 struct plt_entry *ent;
4486
4487 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4488 if (ent != NULL && ent->plt.refcount > 0)
4489 ent->plt.refcount -= 1;
4490 }
4491 }
4492 else if (local_got_refcounts != NULL)
4493 {
4494 if (local_got_refcounts[r_symndx] > 0)
4495 local_got_refcounts[r_symndx]--;
4496 }
4497 break;
4498
4499 case R_PPC_REL24:
4500 case R_PPC_REL14:
4501 case R_PPC_REL14_BRTAKEN:
4502 case R_PPC_REL14_BRNTAKEN:
4503 case R_PPC_REL32:
4504 if (h == NULL || h == htab->elf.hgot)
4505 break;
4506 /* Fall thru */
4507
4508 case R_PPC_ADDR32:
4509 case R_PPC_ADDR24:
4510 case R_PPC_ADDR16:
4511 case R_PPC_ADDR16_LO:
4512 case R_PPC_ADDR16_HI:
4513 case R_PPC_ADDR16_HA:
4514 case R_PPC_ADDR14:
4515 case R_PPC_ADDR14_BRTAKEN:
4516 case R_PPC_ADDR14_BRNTAKEN:
4517 case R_PPC_UADDR32:
4518 case R_PPC_UADDR16:
4519 if (info->shared)
4520 break;
4521
4522 case R_PPC_PLT32:
4523 case R_PPC_PLTREL24:
4524 case R_PPC_PLTREL32:
4525 case R_PPC_PLT16_LO:
4526 case R_PPC_PLT16_HI:
4527 case R_PPC_PLT16_HA:
4528 if (h != NULL)
4529 {
4530 bfd_vma addend = 0;
4531 struct plt_entry *ent;
4532
4533 if (r_type == R_PPC_PLTREL24 && info->shared)
4534 addend = rel->r_addend;
4535 ent = find_plt_ent (&h->plt.plist, got2, addend);
4536 if (ent != NULL && ent->plt.refcount > 0)
4537 ent->plt.refcount -= 1;
4538 }
4539 break;
4540
4541 default:
4542 break;
4543 }
4544 }
4545 return TRUE;
4546 }
4547 \f
4548 /* Set plt output section type, htab->tls_get_addr, and call the
4549 generic ELF tls_setup function. */
4550
4551 asection *
4552 ppc_elf_tls_setup (bfd *obfd,
4553 struct bfd_link_info *info,
4554 int no_tls_get_addr_opt)
4555 {
4556 struct ppc_elf_link_hash_table *htab;
4557
4558 htab = ppc_elf_hash_table (info);
4559 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4560 FALSE, FALSE, TRUE);
4561 if (!no_tls_get_addr_opt)
4562 {
4563 struct elf_link_hash_entry *opt, *tga;
4564 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4565 FALSE, FALSE, TRUE);
4566 if (opt != NULL
4567 && (opt->root.type == bfd_link_hash_defined
4568 || opt->root.type == bfd_link_hash_defweak))
4569 {
4570 /* If glibc supports an optimized __tls_get_addr call stub,
4571 signalled by the presence of __tls_get_addr_opt, and we'll
4572 be calling __tls_get_addr via a plt call stub, then
4573 make __tls_get_addr point to __tls_get_addr_opt. */
4574 tga = htab->tls_get_addr;
4575 if (htab->elf.dynamic_sections_created
4576 && tga != NULL
4577 && (tga->type == STT_FUNC
4578 || tga->needs_plt)
4579 && !(SYMBOL_CALLS_LOCAL (info, tga)
4580 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
4581 && tga->root.type == bfd_link_hash_undefweak)))
4582 {
4583 struct plt_entry *ent;
4584 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
4585 if (ent->plt.refcount > 0)
4586 break;
4587 if (ent != NULL)
4588 {
4589 tga->root.type = bfd_link_hash_indirect;
4590 tga->root.u.i.link = &opt->root;
4591 ppc_elf_copy_indirect_symbol (info, opt, tga);
4592 if (opt->dynindx != -1)
4593 {
4594 /* Use __tls_get_addr_opt in dynamic relocations. */
4595 opt->dynindx = -1;
4596 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4597 opt->dynstr_index);
4598 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
4599 return FALSE;
4600 }
4601 htab->tls_get_addr = opt;
4602 }
4603 }
4604 }
4605 else
4606 no_tls_get_addr_opt = TRUE;
4607 }
4608 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
4609 if (htab->plt_type == PLT_NEW
4610 && htab->plt != NULL
4611 && htab->plt->output_section != NULL)
4612 {
4613 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4614 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4615 }
4616
4617 return _bfd_elf_tls_setup (obfd, info);
4618 }
4619
4620 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4621 HASH. */
4622
4623 static bfd_boolean
4624 branch_reloc_hash_match (const bfd *ibfd,
4625 const Elf_Internal_Rela *rel,
4626 const struct elf_link_hash_entry *hash)
4627 {
4628 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4629 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4630 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4631
4632 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4633 {
4634 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4635 struct elf_link_hash_entry *h;
4636
4637 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4638 while (h->root.type == bfd_link_hash_indirect
4639 || h->root.type == bfd_link_hash_warning)
4640 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4641 if (h == hash)
4642 return TRUE;
4643 }
4644 return FALSE;
4645 }
4646
4647 /* Run through all the TLS relocs looking for optimization
4648 opportunities. */
4649
4650 bfd_boolean
4651 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4652 struct bfd_link_info *info)
4653 {
4654 bfd *ibfd;
4655 asection *sec;
4656 struct ppc_elf_link_hash_table *htab;
4657 int pass;
4658
4659 if (info->relocatable || !info->executable)
4660 return TRUE;
4661
4662 htab = ppc_elf_hash_table (info);
4663 /* Make two passes through the relocs. First time check that tls
4664 relocs involved in setting up a tls_get_addr call are indeed
4665 followed by such a call. If they are not, exclude them from
4666 the optimizations done on the second pass. */
4667 for (pass = 0; pass < 2; ++pass)
4668 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4669 {
4670 Elf_Internal_Sym *locsyms = NULL;
4671 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4672 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
4673
4674 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4675 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4676 {
4677 Elf_Internal_Rela *relstart, *rel, *relend;
4678
4679 /* Read the relocations. */
4680 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4681 info->keep_memory);
4682 if (relstart == NULL)
4683 return FALSE;
4684
4685 relend = relstart + sec->reloc_count;
4686 for (rel = relstart; rel < relend; rel++)
4687 {
4688 enum elf_ppc_reloc_type r_type;
4689 unsigned long r_symndx;
4690 struct elf_link_hash_entry *h = NULL;
4691 char *tls_mask;
4692 char tls_set, tls_clear;
4693 bfd_boolean is_local;
4694 int expecting_tls_get_addr;
4695 bfd_signed_vma *got_count;
4696
4697 r_symndx = ELF32_R_SYM (rel->r_info);
4698 if (r_symndx >= symtab_hdr->sh_info)
4699 {
4700 struct elf_link_hash_entry **sym_hashes;
4701
4702 sym_hashes = elf_sym_hashes (ibfd);
4703 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4704 while (h->root.type == bfd_link_hash_indirect
4705 || h->root.type == bfd_link_hash_warning)
4706 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4707 }
4708
4709 expecting_tls_get_addr = 0;
4710 is_local = FALSE;
4711 if (h == NULL
4712 || !h->def_dynamic)
4713 is_local = TRUE;
4714
4715 r_type = ELF32_R_TYPE (rel->r_info);
4716 switch (r_type)
4717 {
4718 case R_PPC_GOT_TLSLD16:
4719 case R_PPC_GOT_TLSLD16_LO:
4720 expecting_tls_get_addr = 1;
4721 /* Fall thru */
4722
4723 case R_PPC_GOT_TLSLD16_HI:
4724 case R_PPC_GOT_TLSLD16_HA:
4725 /* These relocs should never be against a symbol
4726 defined in a shared lib. Leave them alone if
4727 that turns out to be the case. */
4728 if (!is_local)
4729 continue;
4730
4731 /* LD -> LE */
4732 tls_set = 0;
4733 tls_clear = TLS_LD;
4734 break;
4735
4736 case R_PPC_GOT_TLSGD16:
4737 case R_PPC_GOT_TLSGD16_LO:
4738 expecting_tls_get_addr = 1;
4739 /* Fall thru */
4740
4741 case R_PPC_GOT_TLSGD16_HI:
4742 case R_PPC_GOT_TLSGD16_HA:
4743 if (is_local)
4744 /* GD -> LE */
4745 tls_set = 0;
4746 else
4747 /* GD -> IE */
4748 tls_set = TLS_TLS | TLS_TPRELGD;
4749 tls_clear = TLS_GD;
4750 break;
4751
4752 case R_PPC_GOT_TPREL16:
4753 case R_PPC_GOT_TPREL16_LO:
4754 case R_PPC_GOT_TPREL16_HI:
4755 case R_PPC_GOT_TPREL16_HA:
4756 if (is_local)
4757 {
4758 /* IE -> LE */
4759 tls_set = 0;
4760 tls_clear = TLS_TPREL;
4761 break;
4762 }
4763 else
4764 continue;
4765
4766 case R_PPC_TLSGD:
4767 case R_PPC_TLSLD:
4768 expecting_tls_get_addr = 2;
4769 tls_set = 0;
4770 tls_clear = 0;
4771 break;
4772
4773 default:
4774 continue;
4775 }
4776
4777 if (pass == 0)
4778 {
4779 if (!expecting_tls_get_addr
4780 || (expecting_tls_get_addr == 1
4781 && !sec->has_tls_get_addr_call))
4782 continue;
4783
4784 if (rel + 1 < relend
4785 && branch_reloc_hash_match (ibfd, rel + 1,
4786 htab->tls_get_addr))
4787 continue;
4788
4789 /* Uh oh, we didn't find the expected call. We
4790 could just mark this symbol to exclude it
4791 from tls optimization but it's safer to skip
4792 the entire section. */
4793 sec->has_tls_reloc = 0;
4794 break;
4795 }
4796
4797 if (expecting_tls_get_addr)
4798 {
4799 struct plt_entry *ent;
4800 bfd_vma addend = 0;
4801
4802 if (info->shared
4803 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
4804 addend = rel[1].r_addend;
4805 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4806 got2, addend);
4807 if (ent != NULL && ent->plt.refcount > 0)
4808 ent->plt.refcount -= 1;
4809
4810 if (expecting_tls_get_addr == 2)
4811 continue;
4812 }
4813
4814 if (h != NULL)
4815 {
4816 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4817 got_count = &h->got.refcount;
4818 }
4819 else
4820 {
4821 Elf_Internal_Sym *sym;
4822 bfd_signed_vma *lgot_refs;
4823 struct plt_entry **local_plt;
4824 char *lgot_masks;
4825
4826 if (locsyms == NULL)
4827 {
4828 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4829 if (locsyms == NULL)
4830 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4831 symtab_hdr->sh_info,
4832 0, NULL, NULL, NULL);
4833 if (locsyms == NULL)
4834 {
4835 if (elf_section_data (sec)->relocs != relstart)
4836 free (relstart);
4837 return FALSE;
4838 }
4839 }
4840 sym = locsyms + r_symndx;
4841 lgot_refs = elf_local_got_refcounts (ibfd);
4842 if (lgot_refs == NULL)
4843 abort ();
4844 local_plt = (struct plt_entry **)
4845 (lgot_refs + symtab_hdr->sh_info);
4846 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
4847 tls_mask = &lgot_masks[r_symndx];
4848 got_count = &lgot_refs[r_symndx];
4849 }
4850
4851 if (tls_set == 0)
4852 {
4853 /* We managed to get rid of a got entry. */
4854 if (*got_count > 0)
4855 *got_count -= 1;
4856 }
4857
4858 *tls_mask |= tls_set;
4859 *tls_mask &= ~tls_clear;
4860 }
4861
4862 if (elf_section_data (sec)->relocs != relstart)
4863 free (relstart);
4864 }
4865
4866 if (locsyms != NULL
4867 && (symtab_hdr->contents != (unsigned char *) locsyms))
4868 {
4869 if (!info->keep_memory)
4870 free (locsyms);
4871 else
4872 symtab_hdr->contents = (unsigned char *) locsyms;
4873 }
4874 }
4875 return TRUE;
4876 }
4877 \f
4878 /* Return true if we have dynamic relocs that apply to read-only sections. */
4879
4880 static bfd_boolean
4881 readonly_dynrelocs (struct elf_link_hash_entry *h)
4882 {
4883 struct ppc_elf_dyn_relocs *p;
4884
4885 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4886 {
4887 asection *s = p->sec->output_section;
4888
4889 if (s != NULL
4890 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4891 == (SEC_READONLY | SEC_ALLOC)))
4892 return TRUE;
4893 }
4894 return FALSE;
4895 }
4896
4897 /* Adjust a symbol defined by a dynamic object and referenced by a
4898 regular object. The current definition is in some section of the
4899 dynamic object, but we're not including those sections. We have to
4900 change the definition to something the rest of the link can
4901 understand. */
4902
4903 static bfd_boolean
4904 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4905 struct elf_link_hash_entry *h)
4906 {
4907 struct ppc_elf_link_hash_table *htab;
4908 asection *s;
4909
4910 #ifdef DEBUG
4911 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4912 h->root.root.string);
4913 #endif
4914
4915 /* Make sure we know what is going on here. */
4916 htab = ppc_elf_hash_table (info);
4917 BFD_ASSERT (htab->elf.dynobj != NULL
4918 && (h->needs_plt
4919 || h->type == STT_GNU_IFUNC
4920 || h->u.weakdef != NULL
4921 || (h->def_dynamic
4922 && h->ref_regular
4923 && !h->def_regular)));
4924
4925 /* Deal with function syms. */
4926 if (h->type == STT_FUNC
4927 || h->type == STT_GNU_IFUNC
4928 || h->needs_plt)
4929 {
4930 /* Clear procedure linkage table information for any symbol that
4931 won't need a .plt entry. */
4932 struct plt_entry *ent;
4933 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4934 if (ent->plt.refcount > 0)
4935 break;
4936 if (ent == NULL
4937 || (h->type != STT_GNU_IFUNC
4938 && (SYMBOL_CALLS_LOCAL (info, h)
4939 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4940 && h->root.type == bfd_link_hash_undefweak))))
4941 {
4942 /* A PLT entry is not required/allowed when:
4943
4944 1. We are not using ld.so; because then the PLT entry
4945 can't be set up, so we can't use one. In this case,
4946 ppc_elf_adjust_dynamic_symbol won't even be called.
4947
4948 2. GC has rendered the entry unused.
4949
4950 3. We know for certain that a call to this symbol
4951 will go to this object, or will remain undefined. */
4952 h->plt.plist = NULL;
4953 h->needs_plt = 0;
4954 }
4955 else
4956 {
4957 /* After adjust_dynamic_symbol, non_got_ref set in the
4958 non-shared case means that we have allocated space in
4959 .dynbss for the symbol and thus dyn_relocs for this
4960 symbol should be discarded.
4961 If we get here we know we are making a PLT entry for this
4962 symbol, and in an executable we'd normally resolve
4963 relocations against this symbol to the PLT entry. Allow
4964 dynamic relocs if the reference is weak, and the dynamic
4965 relocs will not cause text relocation. */
4966 if (!h->ref_regular_nonweak
4967 && h->non_got_ref
4968 && h->type != STT_GNU_IFUNC
4969 && !htab->is_vxworks
4970 && !ppc_elf_hash_entry (h)->has_sda_refs
4971 && !readonly_dynrelocs (h))
4972 h->non_got_ref = 0;
4973 }
4974 return TRUE;
4975 }
4976 else
4977 h->plt.plist = NULL;
4978
4979 /* If this is a weak symbol, and there is a real definition, the
4980 processor independent code will have arranged for us to see the
4981 real definition first, and we can just use the same value. */
4982 if (h->u.weakdef != NULL)
4983 {
4984 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4985 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4986 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4987 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4988 if (ELIMINATE_COPY_RELOCS)
4989 h->non_got_ref = h->u.weakdef->non_got_ref;
4990 return TRUE;
4991 }
4992
4993 /* This is a reference to a symbol defined by a dynamic object which
4994 is not a function. */
4995
4996 /* If we are creating a shared library, we must presume that the
4997 only references to the symbol are via the global offset table.
4998 For such cases we need not do anything here; the relocations will
4999 be handled correctly by relocate_section. */
5000 if (info->shared)
5001 return TRUE;
5002
5003 /* If there are no references to this symbol that do not use the
5004 GOT, we don't need to generate a copy reloc. */
5005 if (!h->non_got_ref)
5006 return TRUE;
5007
5008 /* If we didn't find any dynamic relocs in read-only sections, then
5009 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5010 We can't do this if there are any small data relocations. This
5011 doesn't work on VxWorks, where we can not have dynamic
5012 relocations (other than copy and jump slot relocations) in an
5013 executable. */
5014 if (ELIMINATE_COPY_RELOCS
5015 && !ppc_elf_hash_entry (h)->has_sda_refs
5016 && !htab->is_vxworks
5017 && !h->def_regular
5018 && !readonly_dynrelocs (h))
5019 {
5020 h->non_got_ref = 0;
5021 return TRUE;
5022 }
5023
5024 if (h->size == 0)
5025 {
5026 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
5027 h->root.root.string);
5028 return TRUE;
5029 }
5030
5031 /* We must allocate the symbol in our .dynbss section, which will
5032 become part of the .bss section of the executable. There will be
5033 an entry for this symbol in the .dynsym section. The dynamic
5034 object will contain position independent code, so all references
5035 from the dynamic object to this symbol will go through the global
5036 offset table. The dynamic linker will use the .dynsym entry to
5037 determine the address it must put in the global offset table, so
5038 both the dynamic object and the regular object will refer to the
5039 same memory location for the variable.
5040
5041 Of course, if the symbol is referenced using SDAREL relocs, we
5042 must instead allocate it in .sbss. */
5043
5044 if (ppc_elf_hash_entry (h)->has_sda_refs)
5045 s = htab->dynsbss;
5046 else
5047 s = htab->dynbss;
5048 BFD_ASSERT (s != NULL);
5049
5050 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5051 copy the initial value out of the dynamic object and into the
5052 runtime process image. We need to remember the offset into the
5053 .rela.bss section we are going to use. */
5054 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5055 {
5056 asection *srel;
5057
5058 if (ppc_elf_hash_entry (h)->has_sda_refs)
5059 srel = htab->relsbss;
5060 else
5061 srel = htab->relbss;
5062 BFD_ASSERT (srel != NULL);
5063 srel->size += sizeof (Elf32_External_Rela);
5064 h->needs_copy = 1;
5065 }
5066
5067 return _bfd_elf_adjust_dynamic_copy (h, s);
5068 }
5069 \f
5070 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5071 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5072 specifying the addend on the plt relocation. For -fpic code, the sym
5073 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5074 xxxxxxxx.got2.plt_pic32.<callee>. */
5075
5076 static bfd_boolean
5077 add_stub_sym (struct plt_entry *ent,
5078 struct elf_link_hash_entry *h,
5079 struct bfd_link_info *info)
5080 {
5081 struct elf_link_hash_entry *sh;
5082 size_t len1, len2, len3;
5083 char *name;
5084 const char *stub;
5085 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5086
5087 if (info->shared)
5088 stub = ".plt_pic32.";
5089 else
5090 stub = ".plt_call32.";
5091
5092 len1 = strlen (h->root.root.string);
5093 len2 = strlen (stub);
5094 len3 = 0;
5095 if (ent->sec)
5096 len3 = strlen (ent->sec->name);
5097 name = bfd_malloc (len1 + len2 + len3 + 9);
5098 if (name == NULL)
5099 return FALSE;
5100 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5101 if (ent->sec)
5102 memcpy (name + 8, ent->sec->name, len3);
5103 memcpy (name + 8 + len3, stub, len2);
5104 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5105 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5106 if (sh == NULL)
5107 return FALSE;
5108 if (sh->root.type == bfd_link_hash_new)
5109 {
5110 sh->root.type = bfd_link_hash_defined;
5111 sh->root.u.def.section = htab->glink;
5112 sh->root.u.def.value = ent->glink_offset;
5113 sh->ref_regular = 1;
5114 sh->def_regular = 1;
5115 sh->ref_regular_nonweak = 1;
5116 sh->forced_local = 1;
5117 sh->non_elf = 0;
5118 }
5119 return TRUE;
5120 }
5121
5122 /* Allocate NEED contiguous space in .got, and return the offset.
5123 Handles allocation of the got header when crossing 32k. */
5124
5125 static bfd_vma
5126 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5127 {
5128 bfd_vma where;
5129 unsigned int max_before_header;
5130
5131 if (htab->plt_type == PLT_VXWORKS)
5132 {
5133 where = htab->got->size;
5134 htab->got->size += need;
5135 }
5136 else
5137 {
5138 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5139 if (need <= htab->got_gap)
5140 {
5141 where = max_before_header - htab->got_gap;
5142 htab->got_gap -= need;
5143 }
5144 else
5145 {
5146 if (htab->got->size + need > max_before_header
5147 && htab->got->size <= max_before_header)
5148 {
5149 htab->got_gap = max_before_header - htab->got->size;
5150 htab->got->size = max_before_header + htab->got_header_size;
5151 }
5152 where = htab->got->size;
5153 htab->got->size += need;
5154 }
5155 }
5156 return where;
5157 }
5158
5159 /* Allocate space in associated reloc sections for dynamic relocs. */
5160
5161 static bfd_boolean
5162 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5163 {
5164 struct bfd_link_info *info = inf;
5165 struct ppc_elf_link_hash_entry *eh;
5166 struct ppc_elf_link_hash_table *htab;
5167 struct ppc_elf_dyn_relocs *p;
5168
5169 if (h->root.type == bfd_link_hash_indirect)
5170 return TRUE;
5171
5172 if (h->root.type == bfd_link_hash_warning)
5173 /* When warning symbols are created, they **replace** the "real"
5174 entry in the hash table, thus we never get to see the real
5175 symbol in a hash traversal. So look at it now. */
5176 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5177
5178 htab = ppc_elf_hash_table (info);
5179 if (htab->elf.dynamic_sections_created
5180 || h->type == STT_GNU_IFUNC)
5181 {
5182 struct plt_entry *ent;
5183 bfd_boolean doneone = FALSE;
5184 bfd_vma plt_offset = 0, glink_offset = 0;
5185 bfd_boolean dyn;
5186
5187 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5188 if (ent->plt.refcount > 0)
5189 {
5190 /* Make sure this symbol is output as a dynamic symbol. */
5191 if (h->dynindx == -1
5192 && !h->forced_local
5193 && !h->def_regular
5194 && htab->elf.dynamic_sections_created)
5195 {
5196 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5197 return FALSE;
5198 }
5199
5200 dyn = htab->elf.dynamic_sections_created;
5201 if (info->shared
5202 || h->type == STT_GNU_IFUNC
5203 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5204 {
5205 asection *s = htab->plt;
5206 if (!dyn || h->dynindx == -1)
5207 s = htab->iplt;
5208
5209 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5210 {
5211 if (!doneone)
5212 {
5213 plt_offset = s->size;
5214 s->size += 4;
5215 }
5216 ent->plt.offset = plt_offset;
5217
5218 s = htab->glink;
5219 if (!doneone || info->shared)
5220 {
5221 glink_offset = s->size;
5222 s->size += GLINK_ENTRY_SIZE;
5223 if (h == htab->tls_get_addr
5224 && !htab->no_tls_get_addr_opt)
5225 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5226 }
5227 if (!doneone
5228 && !info->shared
5229 && h->def_dynamic
5230 && !h->def_regular)
5231 {
5232 h->root.u.def.section = s;
5233 h->root.u.def.value = glink_offset;
5234 }
5235 ent->glink_offset = glink_offset;
5236
5237 if (htab->emit_stub_syms
5238 && !add_stub_sym (ent, h, info))
5239 return FALSE;
5240 }
5241 else
5242 {
5243 if (!doneone)
5244 {
5245 /* If this is the first .plt entry, make room
5246 for the special first entry. */
5247 if (s->size == 0)
5248 s->size += htab->plt_initial_entry_size;
5249
5250 /* The PowerPC PLT is actually composed of two
5251 parts, the first part is 2 words (for a load
5252 and a jump), and then there is a remaining
5253 word available at the end. */
5254 plt_offset = (htab->plt_initial_entry_size
5255 + (htab->plt_slot_size
5256 * ((s->size
5257 - htab->plt_initial_entry_size)
5258 / htab->plt_entry_size)));
5259
5260 /* If this symbol is not defined in a regular
5261 file, and we are not generating a shared
5262 library, then set the symbol to this location
5263 in the .plt. This is to avoid text
5264 relocations, and is required to make
5265 function pointers compare as equal between
5266 the normal executable and the shared library. */
5267 if (! info->shared
5268 && h->def_dynamic
5269 && !h->def_regular)
5270 {
5271 h->root.u.def.section = s;
5272 h->root.u.def.value = plt_offset;
5273 }
5274
5275 /* Make room for this entry. */
5276 s->size += htab->plt_entry_size;
5277 /* After the 8192nd entry, room for two entries
5278 is allocated. */
5279 if (htab->plt_type == PLT_OLD
5280 && (s->size - htab->plt_initial_entry_size)
5281 / htab->plt_entry_size
5282 > PLT_NUM_SINGLE_ENTRIES)
5283 s->size += htab->plt_entry_size;
5284 }
5285 ent->plt.offset = plt_offset;
5286 }
5287
5288 /* We also need to make an entry in the .rela.plt section. */
5289 if (!doneone)
5290 {
5291 if (!htab->elf.dynamic_sections_created
5292 || h->dynindx == -1)
5293 htab->reliplt->size += sizeof (Elf32_External_Rela);
5294 else
5295 {
5296 htab->relplt->size += sizeof (Elf32_External_Rela);
5297
5298 if (htab->plt_type == PLT_VXWORKS)
5299 {
5300 /* Allocate space for the unloaded relocations. */
5301 if (!info->shared
5302 && htab->elf.dynamic_sections_created)
5303 {
5304 if (ent->plt.offset
5305 == (bfd_vma) htab->plt_initial_entry_size)
5306 {
5307 htab->srelplt2->size
5308 += (sizeof (Elf32_External_Rela)
5309 * VXWORKS_PLTRESOLVE_RELOCS);
5310 }
5311
5312 htab->srelplt2->size
5313 += (sizeof (Elf32_External_Rela)
5314 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5315 }
5316
5317 /* Every PLT entry has an associated GOT entry in
5318 .got.plt. */
5319 htab->sgotplt->size += 4;
5320 }
5321 }
5322 doneone = TRUE;
5323 }
5324 }
5325 else
5326 ent->plt.offset = (bfd_vma) -1;
5327 }
5328 else
5329 ent->plt.offset = (bfd_vma) -1;
5330
5331 if (!doneone)
5332 {
5333 h->plt.plist = NULL;
5334 h->needs_plt = 0;
5335 }
5336 }
5337 else
5338 {
5339 h->plt.plist = NULL;
5340 h->needs_plt = 0;
5341 }
5342
5343 eh = (struct ppc_elf_link_hash_entry *) h;
5344 if (eh->elf.got.refcount > 0)
5345 {
5346 bfd_boolean dyn;
5347 unsigned int need;
5348
5349 /* Make sure this symbol is output as a dynamic symbol. */
5350 if (eh->elf.dynindx == -1
5351 && !eh->elf.forced_local
5352 && eh->elf.type != STT_GNU_IFUNC
5353 && htab->elf.dynamic_sections_created)
5354 {
5355 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5356 return FALSE;
5357 }
5358
5359 need = 0;
5360 if ((eh->tls_mask & TLS_TLS) != 0)
5361 {
5362 if ((eh->tls_mask & TLS_LD) != 0)
5363 {
5364 if (!eh->elf.def_dynamic)
5365 /* We'll just use htab->tlsld_got.offset. This should
5366 always be the case. It's a little odd if we have
5367 a local dynamic reloc against a non-local symbol. */
5368 htab->tlsld_got.refcount += 1;
5369 else
5370 need += 8;
5371 }
5372 if ((eh->tls_mask & TLS_GD) != 0)
5373 need += 8;
5374 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5375 need += 4;
5376 if ((eh->tls_mask & TLS_DTPREL) != 0)
5377 need += 4;
5378 }
5379 else
5380 need += 4;
5381 if (need == 0)
5382 eh->elf.got.offset = (bfd_vma) -1;
5383 else
5384 {
5385 eh->elf.got.offset = allocate_got (htab, need);
5386 dyn = htab->elf.dynamic_sections_created;
5387 if ((info->shared
5388 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5389 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5390 || eh->elf.root.type != bfd_link_hash_undefweak))
5391 {
5392 asection *rsec = htab->relgot;
5393 /* All the entries we allocated need relocs.
5394 Except LD only needs one. */
5395 if ((eh->tls_mask & TLS_LD) != 0
5396 && eh->elf.def_dynamic)
5397 need -= 4;
5398 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5399 }
5400 }
5401 }
5402 else
5403 eh->elf.got.offset = (bfd_vma) -1;
5404
5405 if (eh->dyn_relocs == NULL
5406 || !htab->elf.dynamic_sections_created)
5407 return TRUE;
5408
5409 /* In the shared -Bsymbolic case, discard space allocated for
5410 dynamic pc-relative relocs against symbols which turn out to be
5411 defined in regular objects. For the normal shared case, discard
5412 space for relocs that have become local due to symbol visibility
5413 changes. */
5414
5415 if (info->shared)
5416 {
5417 /* Relocs that use pc_count are those that appear on a call insn,
5418 or certain REL relocs (see must_be_dyn_reloc) that can be
5419 generated via assembly. We want calls to protected symbols to
5420 resolve directly to the function rather than going via the plt.
5421 If people want function pointer comparisons to work as expected
5422 then they should avoid writing weird assembly. */
5423 if (SYMBOL_CALLS_LOCAL (info, h))
5424 {
5425 struct ppc_elf_dyn_relocs **pp;
5426
5427 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5428 {
5429 p->count -= p->pc_count;
5430 p->pc_count = 0;
5431 if (p->count == 0)
5432 *pp = p->next;
5433 else
5434 pp = &p->next;
5435 }
5436 }
5437
5438 if (htab->is_vxworks)
5439 {
5440 struct ppc_elf_dyn_relocs **pp;
5441
5442 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5443 {
5444 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5445 *pp = p->next;
5446 else
5447 pp = &p->next;
5448 }
5449 }
5450
5451 /* Discard relocs on undefined symbols that must be local. */
5452 if (eh->dyn_relocs != NULL
5453 && h->root.type == bfd_link_hash_undefined
5454 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5455 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5456 eh->dyn_relocs = NULL;
5457
5458 /* Also discard relocs on undefined weak syms with non-default
5459 visibility. */
5460 if (eh->dyn_relocs != NULL
5461 && h->root.type == bfd_link_hash_undefweak)
5462 {
5463 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5464 eh->dyn_relocs = NULL;
5465
5466 /* Make sure undefined weak symbols are output as a dynamic
5467 symbol in PIEs. */
5468 else if (h->dynindx == -1
5469 && !h->forced_local
5470 && !h->def_regular)
5471 {
5472 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5473 return FALSE;
5474 }
5475 }
5476 }
5477 else if (ELIMINATE_COPY_RELOCS)
5478 {
5479 /* For the non-shared case, discard space for relocs against
5480 symbols which turn out to need copy relocs or are not
5481 dynamic. */
5482
5483 if (!h->non_got_ref
5484 && !h->def_regular)
5485 {
5486 /* Make sure this symbol is output as a dynamic symbol.
5487 Undefined weak syms won't yet be marked as dynamic. */
5488 if (h->dynindx == -1
5489 && !h->forced_local)
5490 {
5491 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5492 return FALSE;
5493 }
5494
5495 /* If that succeeded, we know we'll be keeping all the
5496 relocs. */
5497 if (h->dynindx != -1)
5498 goto keep;
5499 }
5500
5501 eh->dyn_relocs = NULL;
5502
5503 keep: ;
5504 }
5505
5506 /* Finally, allocate space. */
5507 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5508 {
5509 asection *sreloc = elf_section_data (p->sec)->sreloc;
5510 if (!htab->elf.dynamic_sections_created)
5511 sreloc = htab->reliplt;
5512 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5513 }
5514
5515 return TRUE;
5516 }
5517
5518 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5519 read-only sections. */
5520
5521 static bfd_boolean
5522 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5523 {
5524 if (h->root.type == bfd_link_hash_indirect)
5525 return TRUE;
5526
5527 if (h->root.type == bfd_link_hash_warning)
5528 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5529
5530 if (readonly_dynrelocs (h))
5531 {
5532 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5533
5534 /* Not an error, just cut short the traversal. */
5535 return FALSE;
5536 }
5537 return TRUE;
5538 }
5539
5540 /* Set the sizes of the dynamic sections. */
5541
5542 static bfd_boolean
5543 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5544 struct bfd_link_info *info)
5545 {
5546 struct ppc_elf_link_hash_table *htab;
5547 asection *s;
5548 bfd_boolean relocs;
5549 bfd *ibfd;
5550
5551 #ifdef DEBUG
5552 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5553 #endif
5554
5555 htab = ppc_elf_hash_table (info);
5556 BFD_ASSERT (htab->elf.dynobj != NULL);
5557
5558 if (elf_hash_table (info)->dynamic_sections_created)
5559 {
5560 /* Set the contents of the .interp section to the interpreter. */
5561 if (info->executable)
5562 {
5563 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5564 BFD_ASSERT (s != NULL);
5565 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5566 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5567 }
5568 }
5569
5570 if (htab->plt_type == PLT_OLD)
5571 htab->got_header_size = 16;
5572 else if (htab->plt_type == PLT_NEW)
5573 htab->got_header_size = 12;
5574
5575 /* Set up .got offsets for local syms, and space for local dynamic
5576 relocs. */
5577 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5578 {
5579 bfd_signed_vma *local_got;
5580 bfd_signed_vma *end_local_got;
5581 struct plt_entry **local_plt;
5582 struct plt_entry **end_local_plt;
5583 char *lgot_masks;
5584 bfd_size_type locsymcount;
5585 Elf_Internal_Shdr *symtab_hdr;
5586
5587 if (!is_ppc_elf (ibfd))
5588 continue;
5589
5590 for (s = ibfd->sections; s != NULL; s = s->next)
5591 {
5592 struct ppc_elf_dyn_relocs *p;
5593
5594 for (p = ((struct ppc_elf_dyn_relocs *)
5595 elf_section_data (s)->local_dynrel);
5596 p != NULL;
5597 p = p->next)
5598 {
5599 if (!bfd_is_abs_section (p->sec)
5600 && bfd_is_abs_section (p->sec->output_section))
5601 {
5602 /* Input section has been discarded, either because
5603 it is a copy of a linkonce section or due to
5604 linker script /DISCARD/, so we'll be discarding
5605 the relocs too. */
5606 }
5607 else if (htab->is_vxworks
5608 && strcmp (p->sec->output_section->name,
5609 ".tls_vars") == 0)
5610 {
5611 /* Relocations in vxworks .tls_vars sections are
5612 handled specially by the loader. */
5613 }
5614 else if (p->count != 0)
5615 {
5616 asection *sreloc = elf_section_data (p->sec)->sreloc;
5617 if (!htab->elf.dynamic_sections_created)
5618 sreloc = htab->reliplt;
5619 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5620 if ((p->sec->output_section->flags
5621 & (SEC_READONLY | SEC_ALLOC))
5622 == (SEC_READONLY | SEC_ALLOC))
5623 info->flags |= DF_TEXTREL;
5624 }
5625 }
5626 }
5627
5628 local_got = elf_local_got_refcounts (ibfd);
5629 if (!local_got)
5630 continue;
5631
5632 symtab_hdr = &elf_symtab_hdr (ibfd);
5633 locsymcount = symtab_hdr->sh_info;
5634 end_local_got = local_got + locsymcount;
5635 local_plt = (struct plt_entry **) end_local_got;
5636 end_local_plt = local_plt + locsymcount;
5637 lgot_masks = (char *) end_local_plt;
5638
5639 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5640 if (*local_got > 0)
5641 {
5642 unsigned int need = 0;
5643 if ((*lgot_masks & TLS_TLS) != 0)
5644 {
5645 if ((*lgot_masks & TLS_GD) != 0)
5646 need += 8;
5647 if ((*lgot_masks & TLS_LD) != 0)
5648 htab->tlsld_got.refcount += 1;
5649 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5650 need += 4;
5651 if ((*lgot_masks & TLS_DTPREL) != 0)
5652 need += 4;
5653 }
5654 else
5655 need += 4;
5656 if (need == 0)
5657 *local_got = (bfd_vma) -1;
5658 else
5659 {
5660 *local_got = allocate_got (htab, need);
5661 if (info->shared)
5662 htab->relgot->size += (need
5663 * (sizeof (Elf32_External_Rela) / 4));
5664 }
5665 }
5666 else
5667 *local_got = (bfd_vma) -1;
5668
5669 if (htab->is_vxworks)
5670 continue;
5671
5672 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5673 for (; local_plt < end_local_plt; ++local_plt)
5674 {
5675 struct plt_entry *ent;
5676 bfd_boolean doneone = FALSE;
5677 bfd_vma plt_offset = 0, glink_offset = 0;
5678
5679 for (ent = *local_plt; ent != NULL; ent = ent->next)
5680 if (ent->plt.refcount > 0)
5681 {
5682 s = htab->iplt;
5683
5684 if (!doneone)
5685 {
5686 plt_offset = s->size;
5687 s->size += 4;
5688 }
5689 ent->plt.offset = plt_offset;
5690
5691 s = htab->glink;
5692 if (!doneone || info->shared)
5693 {
5694 glink_offset = s->size;
5695 s->size += GLINK_ENTRY_SIZE;
5696 }
5697 ent->glink_offset = glink_offset;
5698
5699 if (!doneone)
5700 {
5701 htab->reliplt->size += sizeof (Elf32_External_Rela);
5702 doneone = TRUE;
5703 }
5704 }
5705 else
5706 ent->plt.offset = (bfd_vma) -1;
5707 }
5708 }
5709
5710 /* Allocate space for global sym dynamic relocs. */
5711 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5712
5713 if (htab->tlsld_got.refcount > 0)
5714 {
5715 htab->tlsld_got.offset = allocate_got (htab, 8);
5716 if (info->shared)
5717 htab->relgot->size += sizeof (Elf32_External_Rela);
5718 }
5719 else
5720 htab->tlsld_got.offset = (bfd_vma) -1;
5721
5722 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5723 {
5724 unsigned int g_o_t = 32768;
5725
5726 /* If we haven't allocated the header, do so now. When we get here,
5727 for old plt/got the got size will be 0 to 32764 (not allocated),
5728 or 32780 to 65536 (header allocated). For new plt/got, the
5729 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5730 if (htab->got->size <= 32768)
5731 {
5732 g_o_t = htab->got->size;
5733 if (htab->plt_type == PLT_OLD)
5734 g_o_t += 4;
5735 htab->got->size += htab->got_header_size;
5736 }
5737
5738 htab->elf.hgot->root.u.def.value = g_o_t;
5739 }
5740 if (info->shared)
5741 {
5742 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5743 if (sda != NULL
5744 && !(sda->root.type == bfd_link_hash_defined
5745 || sda->root.type == bfd_link_hash_defweak))
5746 {
5747 sda->root.type = bfd_link_hash_defined;
5748 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
5749 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
5750 }
5751 }
5752
5753 if (htab->glink != NULL
5754 && htab->glink->size != 0
5755 && htab->elf.dynamic_sections_created)
5756 {
5757 htab->glink_pltresolve = htab->glink->size;
5758 /* Space for the branch table. */
5759 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5760 /* Pad out to align the start of PLTresolve. */
5761 htab->glink->size += -htab->glink->size & 15;
5762 htab->glink->size += GLINK_PLTRESOLVE;
5763
5764 if (htab->emit_stub_syms)
5765 {
5766 struct elf_link_hash_entry *sh;
5767 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5768 TRUE, FALSE, FALSE);
5769 if (sh == NULL)
5770 return FALSE;
5771 if (sh->root.type == bfd_link_hash_new)
5772 {
5773 sh->root.type = bfd_link_hash_defined;
5774 sh->root.u.def.section = htab->glink;
5775 sh->root.u.def.value = htab->glink_pltresolve;
5776 sh->ref_regular = 1;
5777 sh->def_regular = 1;
5778 sh->ref_regular_nonweak = 1;
5779 sh->forced_local = 1;
5780 sh->non_elf = 0;
5781 }
5782 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5783 TRUE, FALSE, FALSE);
5784 if (sh == NULL)
5785 return FALSE;
5786 if (sh->root.type == bfd_link_hash_new)
5787 {
5788 sh->root.type = bfd_link_hash_defined;
5789 sh->root.u.def.section = htab->glink;
5790 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5791 sh->ref_regular = 1;
5792 sh->def_regular = 1;
5793 sh->ref_regular_nonweak = 1;
5794 sh->forced_local = 1;
5795 sh->non_elf = 0;
5796 }
5797 }
5798 }
5799
5800 /* We've now determined the sizes of the various dynamic sections.
5801 Allocate memory for them. */
5802 relocs = FALSE;
5803 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5804 {
5805 bfd_boolean strip_section = TRUE;
5806
5807 if ((s->flags & SEC_LINKER_CREATED) == 0)
5808 continue;
5809
5810 if (s == htab->plt
5811 || s == htab->got)
5812 {
5813 /* We'd like to strip these sections if they aren't needed, but if
5814 we've exported dynamic symbols from them we must leave them.
5815 It's too late to tell BFD to get rid of the symbols. */
5816 if (htab->elf.hplt != NULL)
5817 strip_section = FALSE;
5818 /* Strip this section if we don't need it; see the
5819 comment below. */
5820 }
5821 else if (s == htab->iplt
5822 || s == htab->glink
5823 || s == htab->sgotplt
5824 || s == htab->sbss
5825 || s == htab->dynbss
5826 || s == htab->dynsbss
5827 || s == htab->sdata[0].section
5828 || s == htab->sdata[1].section)
5829 {
5830 /* Strip these too. */
5831 }
5832 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5833 {
5834 if (s->size != 0)
5835 {
5836 /* Remember whether there are any relocation sections. */
5837 relocs = TRUE;
5838
5839 /* We use the reloc_count field as a counter if we need
5840 to copy relocs into the output file. */
5841 s->reloc_count = 0;
5842 }
5843 }
5844 else
5845 {
5846 /* It's not one of our sections, so don't allocate space. */
5847 continue;
5848 }
5849
5850 if (s->size == 0 && strip_section)
5851 {
5852 /* If we don't need this section, strip it from the
5853 output file. This is mostly to handle .rela.bss and
5854 .rela.plt. We must create both sections in
5855 create_dynamic_sections, because they must be created
5856 before the linker maps input sections to output
5857 sections. The linker does that before
5858 adjust_dynamic_symbol is called, and it is that
5859 function which decides whether anything needs to go
5860 into these sections. */
5861 s->flags |= SEC_EXCLUDE;
5862 continue;
5863 }
5864
5865 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5866 continue;
5867
5868 /* Allocate memory for the section contents. */
5869 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5870 if (s->contents == NULL)
5871 return FALSE;
5872 }
5873
5874 if (htab->elf.dynamic_sections_created)
5875 {
5876 /* Add some entries to the .dynamic section. We fill in the
5877 values later, in ppc_elf_finish_dynamic_sections, but we
5878 must add the entries now so that we get the correct size for
5879 the .dynamic section. The DT_DEBUG entry is filled in by the
5880 dynamic linker and used by the debugger. */
5881 #define add_dynamic_entry(TAG, VAL) \
5882 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5883
5884 if (info->executable)
5885 {
5886 if (!add_dynamic_entry (DT_DEBUG, 0))
5887 return FALSE;
5888 }
5889
5890 if (htab->plt != NULL && htab->plt->size != 0)
5891 {
5892 if (!add_dynamic_entry (DT_PLTGOT, 0)
5893 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5894 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5895 || !add_dynamic_entry (DT_JMPREL, 0))
5896 return FALSE;
5897 }
5898
5899 if (htab->glink != NULL && htab->glink->size != 0)
5900 {
5901 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5902 return FALSE;
5903 if (!htab->no_tls_get_addr_opt
5904 && htab->tls_get_addr != NULL
5905 && htab->tls_get_addr->plt.plist != NULL
5906 && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
5907 return FALSE;
5908 }
5909
5910 if (relocs)
5911 {
5912 if (!add_dynamic_entry (DT_RELA, 0)
5913 || !add_dynamic_entry (DT_RELASZ, 0)
5914 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5915 return FALSE;
5916 }
5917
5918 /* If any dynamic relocs apply to a read-only section, then we
5919 need a DT_TEXTREL entry. */
5920 if ((info->flags & DF_TEXTREL) == 0)
5921 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5922 info);
5923
5924 if ((info->flags & DF_TEXTREL) != 0)
5925 {
5926 if (!add_dynamic_entry (DT_TEXTREL, 0))
5927 return FALSE;
5928 }
5929 if (htab->is_vxworks
5930 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5931 return FALSE;
5932 }
5933 #undef add_dynamic_entry
5934
5935 return TRUE;
5936 }
5937
5938 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5939
5940 static bfd_boolean
5941 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5942 {
5943 if (h->plt.plist != NULL
5944 && !h->def_regular
5945 && (!h->pointer_equality_needed
5946 || !h->ref_regular_nonweak))
5947 return FALSE;
5948
5949 return _bfd_elf_hash_symbol (h);
5950 }
5951 \f
5952 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5953
5954 /* Relaxation trampolines. r12 is available for clobbering (r11, is
5955 used for some functions that are allowed to break the ABI). */
5956 static const int shared_stub_entry[] =
5957 {
5958 0x7c0802a6, /* mflr 0 */
5959 0x429f0005, /* bcl 20, 31, .Lxxx */
5960 0x7d8802a6, /* mflr 12 */
5961 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
5962 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
5963 0x7c0803a6, /* mtlr 0 */
5964 0x7d8903a6, /* mtctr 12 */
5965 0x4e800420, /* bctr */
5966 };
5967
5968 static const int stub_entry[] =
5969 {
5970 0x3d800000, /* lis 12,xxx@ha */
5971 0x398c0000, /* addi 12,12,xxx@l */
5972 0x7d8903a6, /* mtctr 12 */
5973 0x4e800420, /* bctr */
5974 };
5975
5976 static bfd_boolean
5977 ppc_elf_relax_section (bfd *abfd,
5978 asection *isec,
5979 struct bfd_link_info *link_info,
5980 bfd_boolean *again)
5981 {
5982 struct one_fixup
5983 {
5984 struct one_fixup *next;
5985 asection *tsec;
5986 /* Final link, can use the symbol offset. For a
5987 relocatable link we use the symbol's index. */
5988 bfd_vma toff;
5989 bfd_vma trampoff;
5990 };
5991
5992 Elf_Internal_Shdr *symtab_hdr;
5993 bfd_byte *contents = NULL;
5994 Elf_Internal_Sym *isymbuf = NULL;
5995 Elf_Internal_Rela *internal_relocs = NULL;
5996 Elf_Internal_Rela *irel, *irelend;
5997 struct one_fixup *fixups = NULL;
5998 unsigned changes = 0;
5999 struct ppc_elf_link_hash_table *htab;
6000 bfd_size_type trampoff;
6001 asection *got2;
6002
6003 *again = FALSE;
6004
6005 /* Nothing to do if there are no relocations, and no need to do
6006 anything with non-alloc or non-code sections. */
6007 if ((isec->flags & SEC_ALLOC) == 0
6008 || (isec->flags & SEC_CODE) == 0
6009 || (isec->flags & SEC_RELOC) == 0
6010 || isec->reloc_count == 0)
6011 return TRUE;
6012
6013 /* We cannot represent the required PIC relocs in the output, so don't
6014 do anything. The linker doesn't support mixing -shared and -r
6015 anyway. */
6016 if (link_info->relocatable && link_info->shared)
6017 return TRUE;
6018
6019 trampoff = (isec->size + 3) & (bfd_vma) -4;
6020 /* Space for a branch around any trampolines. */
6021 trampoff += 4;
6022
6023 symtab_hdr = &elf_symtab_hdr (abfd);
6024
6025 /* Get a copy of the native relocations. */
6026 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6027 link_info->keep_memory);
6028 if (internal_relocs == NULL)
6029 goto error_return;
6030
6031 htab = ppc_elf_hash_table (link_info);
6032 got2 = bfd_get_section_by_name (abfd, ".got2");
6033
6034 irelend = internal_relocs + isec->reloc_count;
6035 for (irel = internal_relocs; irel < irelend; irel++)
6036 {
6037 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6038 bfd_vma toff, roff;
6039 asection *tsec;
6040 struct one_fixup *f;
6041 size_t insn_offset = 0;
6042 bfd_vma max_branch_offset, val;
6043 bfd_byte *hit_addr;
6044 unsigned long t0;
6045 struct elf_link_hash_entry *h;
6046 struct plt_entry **plist;
6047 unsigned char sym_type;
6048
6049 switch (r_type)
6050 {
6051 case R_PPC_REL24:
6052 case R_PPC_LOCAL24PC:
6053 case R_PPC_PLTREL24:
6054 max_branch_offset = 1 << 25;
6055 break;
6056
6057 case R_PPC_REL14:
6058 case R_PPC_REL14_BRTAKEN:
6059 case R_PPC_REL14_BRNTAKEN:
6060 max_branch_offset = 1 << 15;
6061 break;
6062
6063 default:
6064 continue;
6065 }
6066
6067 /* Get the value of the symbol referred to by the reloc. */
6068 h = NULL;
6069 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6070 {
6071 /* A local symbol. */
6072 Elf_Internal_Sym *isym;
6073
6074 /* Read this BFD's local symbols. */
6075 if (isymbuf == NULL)
6076 {
6077 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6078 if (isymbuf == NULL)
6079 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6080 symtab_hdr->sh_info, 0,
6081 NULL, NULL, NULL);
6082 if (isymbuf == 0)
6083 goto error_return;
6084 }
6085 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6086 if (isym->st_shndx == SHN_UNDEF)
6087 tsec = bfd_und_section_ptr;
6088 else if (isym->st_shndx == SHN_ABS)
6089 tsec = bfd_abs_section_ptr;
6090 else if (isym->st_shndx == SHN_COMMON)
6091 tsec = bfd_com_section_ptr;
6092 else
6093 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6094
6095 toff = isym->st_value;
6096 sym_type = ELF_ST_TYPE (isym->st_info);
6097 }
6098 else
6099 {
6100 /* Global symbol handling. */
6101 unsigned long indx;
6102
6103 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6104 h = elf_sym_hashes (abfd)[indx];
6105
6106 while (h->root.type == bfd_link_hash_indirect
6107 || h->root.type == bfd_link_hash_warning)
6108 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6109
6110 if (h->root.type == bfd_link_hash_defined
6111 || h->root.type == bfd_link_hash_defweak)
6112 {
6113 tsec = h->root.u.def.section;
6114 toff = h->root.u.def.value;
6115 }
6116 else if (h->root.type == bfd_link_hash_undefined
6117 || h->root.type == bfd_link_hash_undefweak)
6118 {
6119 tsec = bfd_und_section_ptr;
6120 toff = link_info->relocatable ? indx : 0;
6121 }
6122 else
6123 continue;
6124
6125 sym_type = h->type;
6126 }
6127
6128 /* The condition here under which we call find_plt_ent must
6129 match that in relocate_section. If we call find_plt_ent here
6130 but not in relocate_section, or vice versa, then the branch
6131 destination used here may be incorrect. */
6132 plist = NULL;
6133 if (h != NULL)
6134 {
6135 /* We know is_branch_reloc (r_type) is true. */
6136 if (h->type == STT_GNU_IFUNC
6137 || r_type == R_PPC_PLTREL24)
6138 plist = &h->plt.plist;
6139 }
6140 else if (sym_type == STT_GNU_IFUNC
6141 && elf_local_got_offsets (abfd) != NULL)
6142 {
6143 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6144 struct plt_entry **local_plt = (struct plt_entry **)
6145 (local_got_offsets + symtab_hdr->sh_info);
6146 plist = local_plt + ELF32_R_SYM (irel->r_info);
6147 }
6148 if (plist != NULL)
6149 {
6150 bfd_vma addend = 0;
6151 struct plt_entry *ent;
6152
6153 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6154 addend = irel->r_addend;
6155 ent = find_plt_ent (plist, got2, addend);
6156 if (ent != NULL)
6157 {
6158 if (htab->plt_type == PLT_NEW
6159 || h == NULL
6160 || !htab->elf.dynamic_sections_created
6161 || h->dynindx == -1)
6162 {
6163 tsec = htab->glink;
6164 toff = ent->glink_offset;
6165 }
6166 else
6167 {
6168 tsec = htab->plt;
6169 toff = ent->plt.offset;
6170 }
6171 }
6172 }
6173
6174 /* If the branch and target are in the same section, you have
6175 no hope of adding stubs. We'll error out later should the
6176 branch overflow. */
6177 if (tsec == isec)
6178 continue;
6179
6180 /* There probably isn't any reason to handle symbols in
6181 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6182 attribute for a code section, and we are only looking at
6183 branches. However, implement it correctly here as a
6184 reference for other target relax_section functions. */
6185 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6186 {
6187 /* At this stage in linking, no SEC_MERGE symbol has been
6188 adjusted, so all references to such symbols need to be
6189 passed through _bfd_merged_section_offset. (Later, in
6190 relocate_section, all SEC_MERGE symbols *except* for
6191 section symbols have been adjusted.)
6192
6193 gas may reduce relocations against symbols in SEC_MERGE
6194 sections to a relocation against the section symbol when
6195 the original addend was zero. When the reloc is against
6196 a section symbol we should include the addend in the
6197 offset passed to _bfd_merged_section_offset, since the
6198 location of interest is the original symbol. On the
6199 other hand, an access to "sym+addend" where "sym" is not
6200 a section symbol should not include the addend; Such an
6201 access is presumed to be an offset from "sym"; The
6202 location of interest is just "sym". */
6203 if (sym_type == STT_SECTION)
6204 toff += irel->r_addend;
6205
6206 toff = _bfd_merged_section_offset (abfd, &tsec,
6207 elf_section_data (tsec)->sec_info,
6208 toff);
6209
6210 if (sym_type != STT_SECTION)
6211 toff += irel->r_addend;
6212 }
6213 /* PLTREL24 addends are special. */
6214 else if (r_type != R_PPC_PLTREL24)
6215 toff += irel->r_addend;
6216
6217 /* Attempted -shared link of non-pic code loses. */
6218 if (tsec->output_section == NULL)
6219 continue;
6220
6221 roff = irel->r_offset;
6222
6223 /* If the branch is in range, no need to do anything. */
6224 if (tsec != bfd_und_section_ptr
6225 && (!link_info->relocatable
6226 /* A relocatable link may have sections moved during
6227 final link, so do not presume they remain in range. */
6228 || tsec->output_section == isec->output_section))
6229 {
6230 bfd_vma symaddr, reladdr;
6231
6232 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6233 reladdr = isec->output_section->vma + isec->output_offset + roff;
6234 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6235 continue;
6236 }
6237
6238 /* Look for an existing fixup to this address. */
6239 for (f = fixups; f ; f = f->next)
6240 if (f->tsec == tsec && f->toff == toff)
6241 break;
6242
6243 if (f == NULL)
6244 {
6245 size_t size;
6246 unsigned long stub_rtype;
6247
6248 val = trampoff - roff;
6249 if (val >= max_branch_offset)
6250 /* Oh dear, we can't reach a trampoline. Don't try to add
6251 one. We'll report an error later. */
6252 continue;
6253
6254 if (link_info->shared)
6255 {
6256 size = 4 * ARRAY_SIZE (shared_stub_entry);
6257 insn_offset = 12;
6258 }
6259 else
6260 {
6261 size = 4 * ARRAY_SIZE (stub_entry);
6262 insn_offset = 0;
6263 }
6264 stub_rtype = R_PPC_RELAX;
6265 if (tsec == htab->plt
6266 || tsec == htab->glink)
6267 {
6268 stub_rtype = R_PPC_RELAX_PLT;
6269 if (r_type == R_PPC_PLTREL24)
6270 stub_rtype = R_PPC_RELAX_PLTREL24;
6271 }
6272
6273 /* Hijack the old relocation. Since we need two
6274 relocations for this use a "composite" reloc. */
6275 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6276 stub_rtype);
6277 irel->r_offset = trampoff + insn_offset;
6278 if (r_type == R_PPC_PLTREL24
6279 && stub_rtype != R_PPC_RELAX_PLTREL24)
6280 irel->r_addend = 0;
6281
6282 /* Record the fixup so we don't do it again this section. */
6283 f = bfd_malloc (sizeof (*f));
6284 f->next = fixups;
6285 f->tsec = tsec;
6286 f->toff = toff;
6287 f->trampoff = trampoff;
6288 fixups = f;
6289
6290 trampoff += size;
6291 changes++;
6292 }
6293 else
6294 {
6295 val = f->trampoff - roff;
6296 if (val >= max_branch_offset)
6297 continue;
6298
6299 /* Nop out the reloc, since we're finalizing things here. */
6300 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6301 }
6302
6303 /* Get the section contents. */
6304 if (contents == NULL)
6305 {
6306 /* Get cached copy if it exists. */
6307 if (elf_section_data (isec)->this_hdr.contents != NULL)
6308 contents = elf_section_data (isec)->this_hdr.contents;
6309 else
6310 {
6311 /* Go get them off disk. */
6312 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6313 goto error_return;
6314 }
6315 }
6316
6317 /* Fix up the existing branch to hit the trampoline. */
6318 hit_addr = contents + roff;
6319 switch (r_type)
6320 {
6321 case R_PPC_REL24:
6322 case R_PPC_LOCAL24PC:
6323 case R_PPC_PLTREL24:
6324 t0 = bfd_get_32 (abfd, hit_addr);
6325 t0 &= ~0x3fffffc;
6326 t0 |= val & 0x3fffffc;
6327 bfd_put_32 (abfd, t0, hit_addr);
6328 break;
6329
6330 case R_PPC_REL14:
6331 case R_PPC_REL14_BRTAKEN:
6332 case R_PPC_REL14_BRNTAKEN:
6333 t0 = bfd_get_32 (abfd, hit_addr);
6334 t0 &= ~0xfffc;
6335 t0 |= val & 0xfffc;
6336 bfd_put_32 (abfd, t0, hit_addr);
6337 break;
6338 }
6339 }
6340
6341 /* Write out the trampolines. */
6342 if (fixups != NULL)
6343 {
6344 const int *stub;
6345 bfd_byte *dest;
6346 bfd_vma val;
6347 int i, size;
6348
6349 do
6350 {
6351 struct one_fixup *f = fixups;
6352 fixups = fixups->next;
6353 free (f);
6354 }
6355 while (fixups);
6356
6357 contents = bfd_realloc_or_free (contents, trampoff);
6358 if (contents == NULL)
6359 goto error_return;
6360
6361 isec->size = (isec->size + 3) & (bfd_vma) -4;
6362 /* Branch around the trampolines. */
6363 val = B + trampoff - isec->size;
6364 dest = contents + isec->size;
6365 isec->size = trampoff;
6366 bfd_put_32 (abfd, val, dest);
6367 dest += 4;
6368
6369 if (link_info->shared)
6370 {
6371 stub = shared_stub_entry;
6372 size = ARRAY_SIZE (shared_stub_entry);
6373 }
6374 else
6375 {
6376 stub = stub_entry;
6377 size = ARRAY_SIZE (stub_entry);
6378 }
6379
6380 i = 0;
6381 while (dest < contents + trampoff)
6382 {
6383 bfd_put_32 (abfd, stub[i], dest);
6384 i++;
6385 if (i == size)
6386 i = 0;
6387 dest += 4;
6388 }
6389 BFD_ASSERT (i == 0);
6390 }
6391
6392 if (isymbuf != NULL
6393 && symtab_hdr->contents != (unsigned char *) isymbuf)
6394 {
6395 if (! link_info->keep_memory)
6396 free (isymbuf);
6397 else
6398 {
6399 /* Cache the symbols for elf_link_input_bfd. */
6400 symtab_hdr->contents = (unsigned char *) isymbuf;
6401 }
6402 }
6403
6404 if (contents != NULL
6405 && elf_section_data (isec)->this_hdr.contents != contents)
6406 {
6407 if (!changes && !link_info->keep_memory)
6408 free (contents);
6409 else
6410 {
6411 /* Cache the section contents for elf_link_input_bfd. */
6412 elf_section_data (isec)->this_hdr.contents = contents;
6413 }
6414 }
6415
6416 if (changes != 0)
6417 {
6418 /* Append sufficient NOP relocs so we can write out relocation
6419 information for the trampolines. */
6420 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6421 * sizeof (*new_relocs));
6422 unsigned ix;
6423
6424 if (!new_relocs)
6425 goto error_return;
6426 memcpy (new_relocs, internal_relocs,
6427 isec->reloc_count * sizeof (*new_relocs));
6428 for (ix = changes; ix--;)
6429 {
6430 irel = new_relocs + ix + isec->reloc_count;
6431
6432 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6433 }
6434 if (internal_relocs != elf_section_data (isec)->relocs)
6435 free (internal_relocs);
6436 elf_section_data (isec)->relocs = new_relocs;
6437 isec->reloc_count += changes;
6438 elf_section_data (isec)->rel_hdr.sh_size
6439 += changes * elf_section_data (isec)->rel_hdr.sh_entsize;
6440 }
6441 else if (elf_section_data (isec)->relocs != internal_relocs)
6442 free (internal_relocs);
6443
6444 *again = changes != 0;
6445 if (!*again && link_info->relocatable)
6446 {
6447 /* Convert the internal relax relocs to external form. */
6448 for (irel = internal_relocs; irel < irelend; irel++)
6449 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
6450 {
6451 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6452
6453 /* Rewrite the reloc and convert one of the trailing nop
6454 relocs to describe this relocation. */
6455 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6456 /* The relocs are at the bottom 2 bytes */
6457 irel[0].r_offset += 2;
6458 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6459 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6460 irel[1].r_offset += 4;
6461 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6462 irel++;
6463 }
6464 }
6465
6466 return TRUE;
6467
6468 error_return:
6469 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6470 free (isymbuf);
6471 if (contents != NULL
6472 && elf_section_data (isec)->this_hdr.contents != contents)
6473 free (contents);
6474 if (internal_relocs != NULL
6475 && elf_section_data (isec)->relocs != internal_relocs)
6476 free (internal_relocs);
6477 return FALSE;
6478 }
6479 \f
6480 /* What to do when ld finds relocations against symbols defined in
6481 discarded sections. */
6482
6483 static unsigned int
6484 ppc_elf_action_discarded (asection *sec)
6485 {
6486 if (strcmp (".fixup", sec->name) == 0)
6487 return 0;
6488
6489 if (strcmp (".got2", sec->name) == 0)
6490 return 0;
6491
6492 return _bfd_elf_default_action_discarded (sec);
6493 }
6494 \f
6495 /* Fill in the address for a pointer generated in a linker section. */
6496
6497 static bfd_vma
6498 elf_finish_pointer_linker_section (bfd *input_bfd,
6499 elf_linker_section_t *lsect,
6500 struct elf_link_hash_entry *h,
6501 bfd_vma relocation,
6502 const Elf_Internal_Rela *rel)
6503 {
6504 elf_linker_section_pointers_t *linker_section_ptr;
6505
6506 BFD_ASSERT (lsect != NULL);
6507
6508 if (h != NULL)
6509 {
6510 /* Handle global symbol. */
6511 struct ppc_elf_link_hash_entry *eh;
6512
6513 eh = (struct ppc_elf_link_hash_entry *) h;
6514 BFD_ASSERT (eh->elf.def_regular);
6515 linker_section_ptr = eh->linker_section_pointer;
6516 }
6517 else
6518 {
6519 /* Handle local symbol. */
6520 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6521
6522 BFD_ASSERT (is_ppc_elf (input_bfd));
6523 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6524 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6525 }
6526
6527 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6528 rel->r_addend,
6529 lsect);
6530 BFD_ASSERT (linker_section_ptr != NULL);
6531
6532 /* Offset will always be a multiple of four, so use the bottom bit
6533 as a "written" flag. */
6534 if ((linker_section_ptr->offset & 1) == 0)
6535 {
6536 bfd_put_32 (lsect->section->owner,
6537 relocation + linker_section_ptr->addend,
6538 lsect->section->contents + linker_section_ptr->offset);
6539 linker_section_ptr->offset += 1;
6540 }
6541
6542 relocation = (lsect->section->output_section->vma
6543 + lsect->section->output_offset
6544 + linker_section_ptr->offset - 1
6545 - SYM_VAL (lsect->sym));
6546
6547 #ifdef DEBUG
6548 fprintf (stderr,
6549 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6550 lsect->name, (long) relocation, (long) relocation);
6551 #endif
6552
6553 return relocation;
6554 }
6555
6556 #define PPC_LO(v) ((v) & 0xffff)
6557 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6558 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6559
6560 static void
6561 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
6562 struct bfd_link_info *info)
6563 {
6564 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6565 bfd *output_bfd = info->output_bfd;
6566 bfd_vma plt;
6567
6568 plt = ((ent->plt.offset & ~1)
6569 + plt_sec->output_section->vma
6570 + plt_sec->output_offset);
6571
6572 if (info->shared)
6573 {
6574 bfd_vma got = 0;
6575
6576 if (ent->addend >= 32768)
6577 got = (ent->addend
6578 + ent->sec->output_section->vma
6579 + ent->sec->output_offset);
6580 else if (htab->elf.hgot != NULL)
6581 got = SYM_VAL (htab->elf.hgot);
6582
6583 plt -= got;
6584
6585 if (plt + 0x8000 < 0x10000)
6586 {
6587 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6588 p += 4;
6589 bfd_put_32 (output_bfd, MTCTR_11, p);
6590 p += 4;
6591 bfd_put_32 (output_bfd, BCTR, p);
6592 p += 4;
6593 bfd_put_32 (output_bfd, NOP, p);
6594 p += 4;
6595 }
6596 else
6597 {
6598 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6599 p += 4;
6600 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6601 p += 4;
6602 bfd_put_32 (output_bfd, MTCTR_11, p);
6603 p += 4;
6604 bfd_put_32 (output_bfd, BCTR, p);
6605 p += 4;
6606 }
6607 }
6608 else
6609 {
6610 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6611 p += 4;
6612 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6613 p += 4;
6614 bfd_put_32 (output_bfd, MTCTR_11, p);
6615 p += 4;
6616 bfd_put_32 (output_bfd, BCTR, p);
6617 p += 4;
6618 }
6619 }
6620
6621 /* Return true if symbol is defined statically. */
6622
6623 static bfd_boolean
6624 is_static_defined (struct elf_link_hash_entry *h)
6625 {
6626 return ((h->root.type == bfd_link_hash_defined
6627 || h->root.type == bfd_link_hash_defweak)
6628 && h->root.u.def.section != NULL
6629 && h->root.u.def.section->output_section != NULL);
6630 }
6631
6632 /* If INSN is an opcode that may be used with an @tls operand, return
6633 the transformed insn for TLS optimisation, otherwise return 0. If
6634 REG is non-zero only match an insn with RB or RA equal to REG. */
6635
6636 unsigned int
6637 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
6638 {
6639 unsigned int rtra;
6640
6641 if ((insn & (0x3f << 26)) != 31 << 26)
6642 return 0;
6643
6644 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
6645 rtra = insn & ((1 << 26) - (1 << 16));
6646 else if (((insn >> 16) & 0x1f) == reg)
6647 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
6648 else
6649 return 0;
6650
6651 if ((insn & (0x3ff << 1)) == 266 << 1)
6652 /* add -> addi. */
6653 insn = 14 << 26;
6654 else if ((insn & (0x1f << 1)) == 23 << 1
6655 && ((insn & (0x1f << 6)) < 14 << 6
6656 || ((insn & (0x1f << 6)) >= 16 << 6
6657 && (insn & (0x1f << 6)) < 24 << 6)))
6658 /* load and store indexed -> dform. */
6659 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
6660 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
6661 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6662 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
6663 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
6664 /* lwax -> lwa. */
6665 insn = (58 << 26) | 2;
6666 else
6667 return 0;
6668 insn |= rtra;
6669 return insn;
6670 }
6671
6672 /* If INSN is an opcode that may be used with an @tprel operand, return
6673 the transformed insn for an undefined weak symbol, ie. with the
6674 thread pointer REG operand removed. Otherwise return 0. */
6675
6676 unsigned int
6677 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
6678 {
6679 if ((insn & (0x1f << 16)) == reg << 16
6680 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6681 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
6682 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6683 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6684 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6685 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6686 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6687 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6688 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6689 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6690 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6691 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6692 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6693 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6694 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6695 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6696 && (insn & 3) != 1)
6697 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6698 && ((insn & 3) == 0 || (insn & 3) == 3))))
6699 {
6700 insn &= ~(0x1f << 16);
6701 }
6702 else if ((insn & (0x1f << 21)) == reg << 21
6703 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
6704 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
6705 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
6706 {
6707 insn &= ~(0x1f << 21);
6708 insn |= (insn & (0x1f << 16)) << 5;
6709 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
6710 insn -= 2 >> 26; /* convert to ori,oris */
6711 }
6712 else
6713 insn = 0;
6714 return insn;
6715 }
6716
6717 /* The RELOCATE_SECTION function is called by the ELF backend linker
6718 to handle the relocations for a section.
6719
6720 The relocs are always passed as Rela structures; if the section
6721 actually uses Rel structures, the r_addend field will always be
6722 zero.
6723
6724 This function is responsible for adjust the section contents as
6725 necessary, and (if using Rela relocs and generating a
6726 relocatable output file) adjusting the reloc addend as
6727 necessary.
6728
6729 This function does not have to worry about setting the reloc
6730 address or the reloc symbol index.
6731
6732 LOCAL_SYMS is a pointer to the swapped in local symbols.
6733
6734 LOCAL_SECTIONS is an array giving the section in the input file
6735 corresponding to the st_shndx field of each local symbol.
6736
6737 The global hash table entry for the global symbols can be found
6738 via elf_sym_hashes (input_bfd).
6739
6740 When generating relocatable output, this function must handle
6741 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6742 going to be the section symbol corresponding to the output
6743 section, which means that the addend must be adjusted
6744 accordingly. */
6745
6746 static bfd_boolean
6747 ppc_elf_relocate_section (bfd *output_bfd,
6748 struct bfd_link_info *info,
6749 bfd *input_bfd,
6750 asection *input_section,
6751 bfd_byte *contents,
6752 Elf_Internal_Rela *relocs,
6753 Elf_Internal_Sym *local_syms,
6754 asection **local_sections)
6755 {
6756 Elf_Internal_Shdr *symtab_hdr;
6757 struct elf_link_hash_entry **sym_hashes;
6758 struct ppc_elf_link_hash_table *htab;
6759 Elf_Internal_Rela *rel;
6760 Elf_Internal_Rela *relend;
6761 Elf_Internal_Rela outrel;
6762 asection *got2, *sreloc = NULL;
6763 bfd_vma *local_got_offsets;
6764 bfd_boolean ret = TRUE;
6765 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6766 bfd_boolean is_vxworks_tls;
6767
6768 #ifdef DEBUG
6769 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6770 "%ld relocations%s",
6771 input_bfd, input_section,
6772 (long) input_section->reloc_count,
6773 (info->relocatable) ? " (relocatable)" : "");
6774 #endif
6775
6776 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6777
6778 /* Initialize howto table if not already done. */
6779 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6780 ppc_elf_howto_init ();
6781
6782 htab = ppc_elf_hash_table (info);
6783 local_got_offsets = elf_local_got_offsets (input_bfd);
6784 symtab_hdr = &elf_symtab_hdr (input_bfd);
6785 sym_hashes = elf_sym_hashes (input_bfd);
6786 /* We have to handle relocations in vxworks .tls_vars sections
6787 specially, because the dynamic loader is 'weird'. */
6788 is_vxworks_tls = (htab->is_vxworks && info->shared
6789 && !strcmp (input_section->output_section->name,
6790 ".tls_vars"));
6791 rel = relocs;
6792 relend = relocs + input_section->reloc_count;
6793 for (; rel < relend; rel++)
6794 {
6795 enum elf_ppc_reloc_type r_type;
6796 bfd_vma addend;
6797 bfd_reloc_status_type r;
6798 Elf_Internal_Sym *sym;
6799 asection *sec;
6800 struct elf_link_hash_entry *h;
6801 const char *sym_name;
6802 reloc_howto_type *howto;
6803 unsigned long r_symndx;
6804 bfd_vma relocation;
6805 bfd_vma branch_bit, from;
6806 bfd_boolean unresolved_reloc;
6807 bfd_boolean warned;
6808 unsigned int tls_type, tls_mask, tls_gd;
6809 struct plt_entry **ifunc;
6810
6811 r_type = ELF32_R_TYPE (rel->r_info);
6812 sym = NULL;
6813 sec = NULL;
6814 h = NULL;
6815 unresolved_reloc = FALSE;
6816 warned = FALSE;
6817 r_symndx = ELF32_R_SYM (rel->r_info);
6818
6819 if (r_symndx < symtab_hdr->sh_info)
6820 {
6821 sym = local_syms + r_symndx;
6822 sec = local_sections[r_symndx];
6823 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6824
6825 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6826 }
6827 else
6828 {
6829 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6830 r_symndx, symtab_hdr, sym_hashes,
6831 h, sec, relocation,
6832 unresolved_reloc, warned);
6833
6834 sym_name = h->root.root.string;
6835 }
6836
6837 if (sec != NULL && elf_discarded_section (sec))
6838 {
6839 /* For relocs against symbols from removed linkonce sections,
6840 or sections discarded by a linker script, we just want the
6841 section contents zeroed. Avoid any special processing. */
6842 howto = NULL;
6843 if (r_type < R_PPC_max)
6844 howto = ppc_elf_howto_table[r_type];
6845 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6846 rel->r_info = 0;
6847 rel->r_addend = 0;
6848 continue;
6849 }
6850
6851 if (info->relocatable)
6852 {
6853 if (got2 != NULL
6854 && r_type == R_PPC_PLTREL24
6855 && rel->r_addend >= 32768)
6856 {
6857 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6858 addend specifies the GOT pointer offset within .got2. */
6859 rel->r_addend += got2->output_offset;
6860 }
6861 continue;
6862 }
6863
6864 /* TLS optimizations. Replace instruction sequences and relocs
6865 based on information we collected in tls_optimize. We edit
6866 RELOCS so that --emit-relocs will output something sensible
6867 for the final instruction stream. */
6868 tls_mask = 0;
6869 tls_gd = 0;
6870 if (h != NULL)
6871 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6872 else if (local_got_offsets != NULL)
6873 {
6874 struct plt_entry **local_plt;
6875 char *lgot_masks;
6876 local_plt
6877 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6878 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6879 tls_mask = lgot_masks[r_symndx];
6880 }
6881
6882 /* Ensure reloc mapping code below stays sane. */
6883 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6884 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6885 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6886 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6887 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6888 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6889 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6890 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6891 abort ();
6892 switch (r_type)
6893 {
6894 default:
6895 break;
6896
6897 case R_PPC_GOT_TPREL16:
6898 case R_PPC_GOT_TPREL16_LO:
6899 if ((tls_mask & TLS_TLS) != 0
6900 && (tls_mask & TLS_TPREL) == 0)
6901 {
6902 bfd_vma insn;
6903
6904 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6905 insn &= 31 << 21;
6906 insn |= 0x3c020000; /* addis 0,2,0 */
6907 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6908 r_type = R_PPC_TPREL16_HA;
6909 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6910 }
6911 break;
6912
6913 case R_PPC_TLS:
6914 if ((tls_mask & TLS_TLS) != 0
6915 && (tls_mask & TLS_TPREL) == 0)
6916 {
6917 bfd_vma insn;
6918
6919 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6920 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
6921 if (insn == 0)
6922 abort ();
6923 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6924 r_type = R_PPC_TPREL16_LO;
6925 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6926
6927 /* Was PPC_TLS which sits on insn boundary, now
6928 PPC_TPREL16_LO which is at low-order half-word. */
6929 rel->r_offset += d_offset;
6930 }
6931 break;
6932
6933 case R_PPC_GOT_TLSGD16_HI:
6934 case R_PPC_GOT_TLSGD16_HA:
6935 tls_gd = TLS_TPRELGD;
6936 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6937 goto tls_gdld_hi;
6938 break;
6939
6940 case R_PPC_GOT_TLSLD16_HI:
6941 case R_PPC_GOT_TLSLD16_HA:
6942 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6943 {
6944 tls_gdld_hi:
6945 if ((tls_mask & tls_gd) != 0)
6946 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6947 + R_PPC_GOT_TPREL16);
6948 else
6949 {
6950 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6951 rel->r_offset -= d_offset;
6952 r_type = R_PPC_NONE;
6953 }
6954 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6955 }
6956 break;
6957
6958 case R_PPC_GOT_TLSGD16:
6959 case R_PPC_GOT_TLSGD16_LO:
6960 tls_gd = TLS_TPRELGD;
6961 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6962 goto tls_ldgd_opt;
6963 break;
6964
6965 case R_PPC_GOT_TLSLD16:
6966 case R_PPC_GOT_TLSLD16_LO:
6967 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6968 {
6969 unsigned int insn1, insn2;
6970 bfd_vma offset;
6971
6972 tls_ldgd_opt:
6973 offset = (bfd_vma) -1;
6974 /* If not using the newer R_PPC_TLSGD/LD to mark
6975 __tls_get_addr calls, we must trust that the call
6976 stays with its arg setup insns, ie. that the next
6977 reloc is the __tls_get_addr call associated with
6978 the current reloc. Edit both insns. */
6979 if (input_section->has_tls_get_addr_call
6980 && rel + 1 < relend
6981 && branch_reloc_hash_match (input_bfd, rel + 1,
6982 htab->tls_get_addr))
6983 offset = rel[1].r_offset;
6984 if ((tls_mask & tls_gd) != 0)
6985 {
6986 /* IE */
6987 insn1 = bfd_get_32 (output_bfd,
6988 contents + rel->r_offset - d_offset);
6989 insn1 &= (1 << 26) - 1;
6990 insn1 |= 32 << 26; /* lwz */
6991 if (offset != (bfd_vma) -1)
6992 {
6993 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
6994 insn2 = 0x7c631214; /* add 3,3,2 */
6995 bfd_put_32 (output_bfd, insn2, contents + offset);
6996 }
6997 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6998 + R_PPC_GOT_TPREL16);
6999 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7000 }
7001 else
7002 {
7003 /* LE */
7004 insn1 = 0x3c620000; /* addis 3,2,0 */
7005 if (tls_gd == 0)
7006 {
7007 /* Was an LD reloc. */
7008 for (r_symndx = 0;
7009 r_symndx < symtab_hdr->sh_info;
7010 r_symndx++)
7011 if (local_sections[r_symndx] == sec)
7012 break;
7013 if (r_symndx >= symtab_hdr->sh_info)
7014 r_symndx = 0;
7015 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7016 if (r_symndx != 0)
7017 rel->r_addend -= (local_syms[r_symndx].st_value
7018 + sec->output_offset
7019 + sec->output_section->vma);
7020 }
7021 r_type = R_PPC_TPREL16_HA;
7022 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7023 if (offset != (bfd_vma) -1)
7024 {
7025 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7026 rel[1].r_offset = offset + d_offset;
7027 rel[1].r_addend = rel->r_addend;
7028 insn2 = 0x38630000; /* addi 3,3,0 */
7029 bfd_put_32 (output_bfd, insn2, contents + offset);
7030 }
7031 }
7032 bfd_put_32 (output_bfd, insn1,
7033 contents + rel->r_offset - d_offset);
7034 if (tls_gd == 0)
7035 {
7036 /* We changed the symbol on an LD reloc. Start over
7037 in order to get h, sym, sec etc. right. */
7038 rel--;
7039 continue;
7040 }
7041 }
7042 break;
7043
7044 case R_PPC_TLSGD:
7045 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7046 {
7047 unsigned int insn2;
7048 bfd_vma offset = rel->r_offset;
7049
7050 if ((tls_mask & TLS_TPRELGD) != 0)
7051 {
7052 /* IE */
7053 r_type = R_PPC_NONE;
7054 insn2 = 0x7c631214; /* add 3,3,2 */
7055 }
7056 else
7057 {
7058 /* LE */
7059 r_type = R_PPC_TPREL16_LO;
7060 rel->r_offset += d_offset;
7061 insn2 = 0x38630000; /* addi 3,3,0 */
7062 }
7063 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7064 bfd_put_32 (output_bfd, insn2, contents + offset);
7065 /* Zap the reloc on the _tls_get_addr call too. */
7066 BFD_ASSERT (offset == rel[1].r_offset);
7067 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7068 }
7069 break;
7070
7071 case R_PPC_TLSLD:
7072 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7073 {
7074 unsigned int insn2;
7075
7076 for (r_symndx = 0;
7077 r_symndx < symtab_hdr->sh_info;
7078 r_symndx++)
7079 if (local_sections[r_symndx] == sec)
7080 break;
7081 if (r_symndx >= symtab_hdr->sh_info)
7082 r_symndx = 0;
7083 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7084 if (r_symndx != 0)
7085 rel->r_addend -= (local_syms[r_symndx].st_value
7086 + sec->output_offset
7087 + sec->output_section->vma);
7088
7089 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7090 rel->r_offset += d_offset;
7091 insn2 = 0x38630000; /* addi 3,3,0 */
7092 bfd_put_32 (output_bfd, insn2,
7093 contents + rel->r_offset - d_offset);
7094 /* Zap the reloc on the _tls_get_addr call too. */
7095 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7096 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7097 rel--;
7098 continue;
7099 }
7100 break;
7101 }
7102
7103 /* Handle other relocations that tweak non-addend part of insn. */
7104 branch_bit = 0;
7105 switch (r_type)
7106 {
7107 default:
7108 break;
7109
7110 /* Branch taken prediction relocations. */
7111 case R_PPC_ADDR14_BRTAKEN:
7112 case R_PPC_REL14_BRTAKEN:
7113 branch_bit = BRANCH_PREDICT_BIT;
7114 /* Fall thru */
7115
7116 /* Branch not taken prediction relocations. */
7117 case R_PPC_ADDR14_BRNTAKEN:
7118 case R_PPC_REL14_BRNTAKEN:
7119 {
7120 bfd_vma insn;
7121
7122 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7123 insn &= ~BRANCH_PREDICT_BIT;
7124 insn |= branch_bit;
7125
7126 from = (rel->r_offset
7127 + input_section->output_offset
7128 + input_section->output_section->vma);
7129
7130 /* Invert 'y' bit if not the default. */
7131 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7132 insn ^= BRANCH_PREDICT_BIT;
7133
7134 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7135 break;
7136 }
7137 }
7138
7139 ifunc = NULL;
7140 if (!htab->is_vxworks)
7141 {
7142 struct plt_entry *ent;
7143
7144 if (h != NULL)
7145 {
7146 if (h->type == STT_GNU_IFUNC)
7147 ifunc = &h->plt.plist;
7148 }
7149 else if (local_got_offsets != NULL
7150 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7151 {
7152 struct plt_entry **local_plt;
7153
7154 local_plt = (struct plt_entry **) (local_got_offsets
7155 + symtab_hdr->sh_info);
7156 ifunc = local_plt + r_symndx;
7157 }
7158
7159 ent = NULL;
7160 if (ifunc != NULL
7161 && (!info->shared
7162 || is_branch_reloc (r_type)))
7163 {
7164 addend = 0;
7165 if (r_type == R_PPC_PLTREL24 && info->shared)
7166 addend = rel->r_addend;
7167 ent = find_plt_ent (ifunc, got2, addend);
7168 }
7169 if (ent != NULL)
7170 {
7171 if (h == NULL && (ent->plt.offset & 1) == 0)
7172 {
7173 Elf_Internal_Rela rela;
7174 bfd_byte *loc;
7175
7176 rela.r_offset = (htab->iplt->output_section->vma
7177 + htab->iplt->output_offset
7178 + ent->plt.offset);
7179 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7180 rela.r_addend = relocation;
7181 loc = htab->reliplt->contents;
7182 loc += (htab->reliplt->reloc_count++
7183 * sizeof (Elf32_External_Rela));
7184 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7185
7186 ent->plt.offset |= 1;
7187 }
7188 if (h == NULL && (ent->glink_offset & 1) == 0)
7189 {
7190 unsigned char *p = ((unsigned char *) htab->glink->contents
7191 + ent->glink_offset);
7192 write_glink_stub (ent, htab->iplt, p, info);
7193 ent->glink_offset |= 1;
7194 }
7195
7196 unresolved_reloc = FALSE;
7197 if (htab->plt_type == PLT_NEW
7198 || !htab->elf.dynamic_sections_created
7199 || h == NULL)
7200 relocation = (htab->glink->output_section->vma
7201 + htab->glink->output_offset
7202 + (ent->glink_offset & ~1));
7203 else
7204 relocation = (htab->plt->output_section->vma
7205 + htab->plt->output_offset
7206 + ent->plt.offset);
7207 }
7208 }
7209
7210 addend = rel->r_addend;
7211 tls_type = 0;
7212 howto = NULL;
7213 if (r_type < R_PPC_max)
7214 howto = ppc_elf_howto_table[r_type];
7215 switch (r_type)
7216 {
7217 default:
7218 (*_bfd_error_handler)
7219 (_("%B: unknown relocation type %d for symbol %s"),
7220 input_bfd, (int) r_type, sym_name);
7221
7222 bfd_set_error (bfd_error_bad_value);
7223 ret = FALSE;
7224 continue;
7225
7226 case R_PPC_NONE:
7227 case R_PPC_TLS:
7228 case R_PPC_TLSGD:
7229 case R_PPC_TLSLD:
7230 case R_PPC_EMB_MRKREF:
7231 case R_PPC_GNU_VTINHERIT:
7232 case R_PPC_GNU_VTENTRY:
7233 continue;
7234
7235 /* GOT16 relocations. Like an ADDR16 using the symbol's
7236 address in the GOT as relocation value instead of the
7237 symbol's value itself. Also, create a GOT entry for the
7238 symbol and put the symbol value there. */
7239 case R_PPC_GOT_TLSGD16:
7240 case R_PPC_GOT_TLSGD16_LO:
7241 case R_PPC_GOT_TLSGD16_HI:
7242 case R_PPC_GOT_TLSGD16_HA:
7243 tls_type = TLS_TLS | TLS_GD;
7244 goto dogot;
7245
7246 case R_PPC_GOT_TLSLD16:
7247 case R_PPC_GOT_TLSLD16_LO:
7248 case R_PPC_GOT_TLSLD16_HI:
7249 case R_PPC_GOT_TLSLD16_HA:
7250 tls_type = TLS_TLS | TLS_LD;
7251 goto dogot;
7252
7253 case R_PPC_GOT_TPREL16:
7254 case R_PPC_GOT_TPREL16_LO:
7255 case R_PPC_GOT_TPREL16_HI:
7256 case R_PPC_GOT_TPREL16_HA:
7257 tls_type = TLS_TLS | TLS_TPREL;
7258 goto dogot;
7259
7260 case R_PPC_GOT_DTPREL16:
7261 case R_PPC_GOT_DTPREL16_LO:
7262 case R_PPC_GOT_DTPREL16_HI:
7263 case R_PPC_GOT_DTPREL16_HA:
7264 tls_type = TLS_TLS | TLS_DTPREL;
7265 goto dogot;
7266
7267 case R_PPC_GOT16:
7268 case R_PPC_GOT16_LO:
7269 case R_PPC_GOT16_HI:
7270 case R_PPC_GOT16_HA:
7271 tls_mask = 0;
7272 dogot:
7273 {
7274 /* Relocation is to the entry for this symbol in the global
7275 offset table. */
7276 bfd_vma off;
7277 bfd_vma *offp;
7278 unsigned long indx;
7279
7280 if (htab->got == NULL)
7281 abort ();
7282
7283 indx = 0;
7284 if (tls_type == (TLS_TLS | TLS_LD)
7285 && (h == NULL
7286 || !h->def_dynamic))
7287 offp = &htab->tlsld_got.offset;
7288 else if (h != NULL)
7289 {
7290 bfd_boolean dyn;
7291 dyn = htab->elf.dynamic_sections_created;
7292 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7293 || (info->shared
7294 && SYMBOL_REFERENCES_LOCAL (info, h)))
7295 /* This is actually a static link, or it is a
7296 -Bsymbolic link and the symbol is defined
7297 locally, or the symbol was forced to be local
7298 because of a version file. */
7299 ;
7300 else
7301 {
7302 indx = h->dynindx;
7303 unresolved_reloc = FALSE;
7304 }
7305 offp = &h->got.offset;
7306 }
7307 else
7308 {
7309 if (local_got_offsets == NULL)
7310 abort ();
7311 offp = &local_got_offsets[r_symndx];
7312 }
7313
7314 /* The offset must always be a multiple of 4. We use the
7315 least significant bit to record whether we have already
7316 processed this entry. */
7317 off = *offp;
7318 if ((off & 1) != 0)
7319 off &= ~1;
7320 else
7321 {
7322 unsigned int tls_m = (tls_mask
7323 & (TLS_LD | TLS_GD | TLS_DTPREL
7324 | TLS_TPREL | TLS_TPRELGD));
7325
7326 if (offp == &htab->tlsld_got.offset)
7327 tls_m = TLS_LD;
7328 else if (h == NULL
7329 || !h->def_dynamic)
7330 tls_m &= ~TLS_LD;
7331
7332 /* We might have multiple got entries for this sym.
7333 Initialize them all. */
7334 do
7335 {
7336 int tls_ty = 0;
7337
7338 if ((tls_m & TLS_LD) != 0)
7339 {
7340 tls_ty = TLS_TLS | TLS_LD;
7341 tls_m &= ~TLS_LD;
7342 }
7343 else if ((tls_m & TLS_GD) != 0)
7344 {
7345 tls_ty = TLS_TLS | TLS_GD;
7346 tls_m &= ~TLS_GD;
7347 }
7348 else if ((tls_m & TLS_DTPREL) != 0)
7349 {
7350 tls_ty = TLS_TLS | TLS_DTPREL;
7351 tls_m &= ~TLS_DTPREL;
7352 }
7353 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7354 {
7355 tls_ty = TLS_TLS | TLS_TPREL;
7356 tls_m = 0;
7357 }
7358
7359 /* Generate relocs for the dynamic linker. */
7360 if ((info->shared || indx != 0)
7361 && (offp == &htab->tlsld_got.offset
7362 || h == NULL
7363 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7364 || h->root.type != bfd_link_hash_undefweak))
7365 {
7366 asection *rsec = htab->relgot;
7367 bfd_byte * loc;
7368
7369 outrel.r_offset = (htab->got->output_section->vma
7370 + htab->got->output_offset
7371 + off);
7372 outrel.r_addend = 0;
7373 if (tls_ty & (TLS_LD | TLS_GD))
7374 {
7375 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7376 if (tls_ty == (TLS_TLS | TLS_GD))
7377 {
7378 loc = rsec->contents;
7379 loc += (rsec->reloc_count++
7380 * sizeof (Elf32_External_Rela));
7381 bfd_elf32_swap_reloca_out (output_bfd,
7382 &outrel, loc);
7383 outrel.r_offset += 4;
7384 outrel.r_info
7385 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7386 }
7387 }
7388 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7389 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7390 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7391 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7392 else if (indx != 0)
7393 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7394 else if (ifunc != NULL)
7395 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7396 else
7397 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7398 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7399 {
7400 outrel.r_addend += relocation;
7401 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7402 outrel.r_addend -= htab->elf.tls_sec->vma;
7403 }
7404 loc = rsec->contents;
7405 loc += (rsec->reloc_count++
7406 * sizeof (Elf32_External_Rela));
7407 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7408 }
7409
7410 /* Init the .got section contents if we're not
7411 emitting a reloc. */
7412 else
7413 {
7414 bfd_vma value = relocation;
7415
7416 if (tls_ty == (TLS_TLS | TLS_LD))
7417 value = 1;
7418 else if (tls_ty != 0)
7419 {
7420 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7421 if (tls_ty == (TLS_TLS | TLS_TPREL))
7422 value += DTP_OFFSET - TP_OFFSET;
7423
7424 if (tls_ty == (TLS_TLS | TLS_GD))
7425 {
7426 bfd_put_32 (output_bfd, value,
7427 htab->got->contents + off + 4);
7428 value = 1;
7429 }
7430 }
7431 bfd_put_32 (output_bfd, value,
7432 htab->got->contents + off);
7433 }
7434
7435 off += 4;
7436 if (tls_ty & (TLS_LD | TLS_GD))
7437 off += 4;
7438 }
7439 while (tls_m != 0);
7440
7441 off = *offp;
7442 *offp = off | 1;
7443 }
7444
7445 if (off >= (bfd_vma) -2)
7446 abort ();
7447
7448 if ((tls_type & TLS_TLS) != 0)
7449 {
7450 if (tls_type != (TLS_TLS | TLS_LD))
7451 {
7452 if ((tls_mask & TLS_LD) != 0
7453 && !(h == NULL
7454 || !h->def_dynamic))
7455 off += 8;
7456 if (tls_type != (TLS_TLS | TLS_GD))
7457 {
7458 if ((tls_mask & TLS_GD) != 0)
7459 off += 8;
7460 if (tls_type != (TLS_TLS | TLS_DTPREL))
7461 {
7462 if ((tls_mask & TLS_DTPREL) != 0)
7463 off += 4;
7464 }
7465 }
7466 }
7467 }
7468
7469 relocation = (htab->got->output_section->vma
7470 + htab->got->output_offset
7471 + off
7472 - SYM_VAL (htab->elf.hgot));
7473
7474 /* Addends on got relocations don't make much sense.
7475 x+off@got is actually x@got+off, and since the got is
7476 generated by a hash table traversal, the value in the
7477 got at entry m+n bears little relation to the entry m. */
7478 if (addend != 0)
7479 (*_bfd_error_handler)
7480 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
7481 input_bfd,
7482 input_section,
7483 (long) rel->r_offset,
7484 howto->name,
7485 sym_name);
7486 }
7487 break;
7488
7489 /* Relocations that need no special processing. */
7490 case R_PPC_LOCAL24PC:
7491 /* It makes no sense to point a local relocation
7492 at a symbol not in this object. */
7493 if (unresolved_reloc)
7494 {
7495 if (! (*info->callbacks->undefined_symbol) (info,
7496 h->root.root.string,
7497 input_bfd,
7498 input_section,
7499 rel->r_offset,
7500 TRUE))
7501 return FALSE;
7502 continue;
7503 }
7504 break;
7505
7506 case R_PPC_DTPREL16:
7507 case R_PPC_DTPREL16_LO:
7508 case R_PPC_DTPREL16_HI:
7509 case R_PPC_DTPREL16_HA:
7510 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7511 break;
7512
7513 /* Relocations that may need to be propagated if this is a shared
7514 object. */
7515 case R_PPC_TPREL16:
7516 case R_PPC_TPREL16_LO:
7517 case R_PPC_TPREL16_HI:
7518 case R_PPC_TPREL16_HA:
7519 if (h != NULL
7520 && h->root.type == bfd_link_hash_undefweak
7521 && h->dynindx == -1)
7522 {
7523 /* Make this relocation against an undefined weak symbol
7524 resolve to zero. This is really just a tweak, since
7525 code using weak externs ought to check that they are
7526 defined before using them. */
7527 bfd_byte *p = contents + rel->r_offset - d_offset;
7528 unsigned int insn = bfd_get_32 (output_bfd, p);
7529 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
7530 if (insn != 0)
7531 bfd_put_32 (output_bfd, insn, p);
7532 break;
7533 }
7534 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7535 /* The TPREL16 relocs shouldn't really be used in shared
7536 libs as they will result in DT_TEXTREL being set, but
7537 support them anyway. */
7538 goto dodyn;
7539
7540 case R_PPC_TPREL32:
7541 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7542 goto dodyn;
7543
7544 case R_PPC_DTPREL32:
7545 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7546 goto dodyn;
7547
7548 case R_PPC_DTPMOD32:
7549 relocation = 1;
7550 addend = 0;
7551 goto dodyn;
7552
7553 case R_PPC_REL16:
7554 case R_PPC_REL16_LO:
7555 case R_PPC_REL16_HI:
7556 case R_PPC_REL16_HA:
7557 break;
7558
7559 case R_PPC_REL32:
7560 if (h == NULL || h == htab->elf.hgot)
7561 break;
7562 /* fall through */
7563
7564 case R_PPC_ADDR32:
7565 case R_PPC_ADDR16:
7566 case R_PPC_ADDR16_LO:
7567 case R_PPC_ADDR16_HI:
7568 case R_PPC_ADDR16_HA:
7569 case R_PPC_UADDR32:
7570 case R_PPC_UADDR16:
7571 goto dodyn;
7572
7573 case R_PPC_REL24:
7574 case R_PPC_REL14:
7575 case R_PPC_REL14_BRTAKEN:
7576 case R_PPC_REL14_BRNTAKEN:
7577 /* If these relocations are not to a named symbol, they can be
7578 handled right here, no need to bother the dynamic linker. */
7579 if (SYMBOL_CALLS_LOCAL (info, h)
7580 || h == htab->elf.hgot)
7581 break;
7582 /* fall through */
7583
7584 case R_PPC_ADDR24:
7585 case R_PPC_ADDR14:
7586 case R_PPC_ADDR14_BRTAKEN:
7587 case R_PPC_ADDR14_BRNTAKEN:
7588 if (h != NULL && !info->shared)
7589 break;
7590 /* fall through */
7591
7592 dodyn:
7593 if ((input_section->flags & SEC_ALLOC) == 0
7594 || is_vxworks_tls)
7595 break;
7596
7597 if ((info->shared
7598 && !(h != NULL
7599 && ((h->root.type == bfd_link_hash_undefined
7600 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7601 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7602 || (h->root.type == bfd_link_hash_undefweak
7603 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7604 && (must_be_dyn_reloc (info, r_type)
7605 || !SYMBOL_CALLS_LOCAL (info, h)))
7606 || (ELIMINATE_COPY_RELOCS
7607 && !info->shared
7608 && h != NULL
7609 && h->dynindx != -1
7610 && !h->non_got_ref
7611 && !h->def_regular))
7612 {
7613 int skip;
7614 bfd_byte * loc;
7615 #ifdef DEBUG
7616 fprintf (stderr, "ppc_elf_relocate_section needs to "
7617 "create relocation for %s\n",
7618 (h && h->root.root.string
7619 ? h->root.root.string : "<unknown>"));
7620 #endif
7621
7622 /* When generating a shared object, these relocations
7623 are copied into the output file to be resolved at run
7624 time. */
7625 if (sreloc == NULL)
7626 {
7627 sreloc = elf_section_data (input_section)->sreloc;
7628 if (!htab->elf.dynamic_sections_created)
7629 sreloc = htab->reliplt;
7630 if (sreloc == NULL)
7631 return FALSE;
7632 }
7633
7634 skip = 0;
7635 outrel.r_offset =
7636 _bfd_elf_section_offset (output_bfd, info, input_section,
7637 rel->r_offset);
7638 if (outrel.r_offset == (bfd_vma) -1
7639 || outrel.r_offset == (bfd_vma) -2)
7640 skip = (int) outrel.r_offset;
7641 outrel.r_offset += (input_section->output_section->vma
7642 + input_section->output_offset);
7643
7644 if (skip)
7645 memset (&outrel, 0, sizeof outrel);
7646 else if ((h != NULL
7647 && (h->root.type == bfd_link_hash_undefined
7648 || h->root.type == bfd_link_hash_undefweak))
7649 || !SYMBOL_REFERENCES_LOCAL (info, h))
7650 {
7651 unresolved_reloc = FALSE;
7652 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7653 outrel.r_addend = rel->r_addend;
7654 }
7655 else
7656 {
7657 outrel.r_addend = relocation + rel->r_addend;
7658
7659 if (r_type != R_PPC_ADDR32)
7660 {
7661 long indx = 0;
7662
7663 if (ifunc != NULL)
7664 {
7665 /* If we get here when building a static
7666 executable, then the libc startup function
7667 responsible for applying indirect function
7668 relocations is going to complain about
7669 the reloc type.
7670 If we get here when building a dynamic
7671 executable, it will be because we have
7672 a text relocation. The dynamic loader
7673 will set the text segment writable and
7674 non-executable to apply text relocations.
7675 So we'll segfault when trying to run the
7676 indirection function to resolve the reloc. */
7677 (*_bfd_error_handler)
7678 (_("%B(%A+0x%lx): relocation %s for indirect "
7679 "function %s unsupported"),
7680 input_bfd,
7681 input_section,
7682 (long) rel->r_offset,
7683 howto->name,
7684 sym_name);
7685 ret = FALSE;
7686 }
7687 else if (r_symndx == 0 || bfd_is_abs_section (sec))
7688 ;
7689 else if (sec == NULL || sec->owner == NULL)
7690 {
7691 bfd_set_error (bfd_error_bad_value);
7692 ret = FALSE;
7693 }
7694 else
7695 {
7696 asection *osec;
7697
7698 /* We are turning this relocation into one
7699 against a section symbol. It would be
7700 proper to subtract the symbol's value,
7701 osec->vma, from the emitted reloc addend,
7702 but ld.so expects buggy relocs.
7703 FIXME: Why not always use a zero index? */
7704 osec = sec->output_section;
7705 indx = elf_section_data (osec)->dynindx;
7706 if (indx == 0)
7707 {
7708 osec = htab->elf.text_index_section;
7709 indx = elf_section_data (osec)->dynindx;
7710 }
7711 BFD_ASSERT (indx != 0);
7712 #ifdef DEBUG
7713 if (indx == 0)
7714 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7715 indx, osec->name, osec->flags,
7716 h->root.root.string);
7717 #endif
7718 }
7719
7720 outrel.r_info = ELF32_R_INFO (indx, r_type);
7721 }
7722 else if (ifunc != NULL)
7723 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7724 else
7725 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7726 }
7727
7728 loc = sreloc->contents;
7729 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7730 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7731
7732 if (skip == -1)
7733 continue;
7734
7735 /* This reloc will be computed at runtime. We clear the memory
7736 so that it contains predictable value. */
7737 if (! skip
7738 && ((input_section->flags & SEC_ALLOC) != 0
7739 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7740 {
7741 relocation = howto->pc_relative ? outrel.r_offset : 0;
7742 addend = 0;
7743 break;
7744 }
7745 }
7746 break;
7747
7748 case R_PPC_RELAX_PLT:
7749 case R_PPC_RELAX_PLTREL24:
7750 if (h != NULL)
7751 {
7752 struct plt_entry *ent;
7753 bfd_vma got2_addend = 0;
7754
7755 if (r_type == R_PPC_RELAX_PLTREL24)
7756 {
7757 if (info->shared)
7758 got2_addend = addend;
7759 addend = 0;
7760 }
7761 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
7762 if (htab->plt_type == PLT_NEW)
7763 relocation = (htab->glink->output_section->vma
7764 + htab->glink->output_offset
7765 + ent->glink_offset);
7766 else
7767 relocation = (htab->plt->output_section->vma
7768 + htab->plt->output_offset
7769 + ent->plt.offset);
7770 }
7771 /* Fall thru */
7772
7773 case R_PPC_RELAX:
7774 if (info->shared)
7775 relocation -= (input_section->output_section->vma
7776 + input_section->output_offset
7777 + rel->r_offset - 4);
7778
7779 {
7780 unsigned long t0;
7781 unsigned long t1;
7782
7783 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7784 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7785
7786 /* We're clearing the bits for R_PPC_ADDR16_HA
7787 and R_PPC_ADDR16_LO here. */
7788 t0 &= ~0xffff;
7789 t1 &= ~0xffff;
7790
7791 /* t0 is HA, t1 is LO */
7792 relocation += addend;
7793 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7794 t1 |= relocation & 0xffff;
7795
7796 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7797 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7798
7799 /* Rewrite the reloc and convert one of the trailing nop
7800 relocs to describe this relocation. */
7801 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7802 /* The relocs are at the bottom 2 bytes */
7803 rel[0].r_offset += 2;
7804 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7805 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7806 rel[1].r_offset += 4;
7807 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7808 rel++;
7809 }
7810 continue;
7811
7812 /* Indirect .sdata relocation. */
7813 case R_PPC_EMB_SDAI16:
7814 BFD_ASSERT (htab->sdata[0].section != NULL);
7815 if (!is_static_defined (htab->sdata[0].sym))
7816 {
7817 unresolved_reloc = TRUE;
7818 break;
7819 }
7820 relocation
7821 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7822 h, relocation, rel);
7823 addend = 0;
7824 break;
7825
7826 /* Indirect .sdata2 relocation. */
7827 case R_PPC_EMB_SDA2I16:
7828 BFD_ASSERT (htab->sdata[1].section != NULL);
7829 if (!is_static_defined (htab->sdata[1].sym))
7830 {
7831 unresolved_reloc = TRUE;
7832 break;
7833 }
7834 relocation
7835 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7836 h, relocation, rel);
7837 addend = 0;
7838 break;
7839
7840 /* Handle the TOC16 reloc. We want to use the offset within the .got
7841 section, not the actual VMA. This is appropriate when generating
7842 an embedded ELF object, for which the .got section acts like the
7843 AIX .toc section. */
7844 case R_PPC_TOC16: /* phony GOT16 relocations */
7845 if (sec == NULL || sec->output_section == NULL)
7846 {
7847 unresolved_reloc = TRUE;
7848 break;
7849 }
7850 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7851 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7852
7853 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7854 break;
7855
7856 case R_PPC_PLTREL24:
7857 if (h == NULL || ifunc != NULL)
7858 break;
7859 /* Relocation is to the entry for this symbol in the
7860 procedure linkage table. */
7861 {
7862 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7863 info->shared ? addend : 0);
7864 addend = 0;
7865 if (ent == NULL
7866 || htab->plt == NULL)
7867 {
7868 /* We didn't make a PLT entry for this symbol. This
7869 happens when statically linking PIC code, or when
7870 using -Bsymbolic. */
7871 break;
7872 }
7873
7874 unresolved_reloc = FALSE;
7875 if (htab->plt_type == PLT_NEW)
7876 relocation = (htab->glink->output_section->vma
7877 + htab->glink->output_offset
7878 + ent->glink_offset);
7879 else
7880 relocation = (htab->plt->output_section->vma
7881 + htab->plt->output_offset
7882 + ent->plt.offset);
7883 }
7884 break;
7885
7886 /* Relocate against _SDA_BASE_. */
7887 case R_PPC_SDAREL16:
7888 {
7889 const char *name;
7890 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
7891
7892 if (sec == NULL
7893 || sec->output_section == NULL
7894 || !is_static_defined (sda))
7895 {
7896 unresolved_reloc = TRUE;
7897 break;
7898 }
7899 addend -= SYM_VAL (sda);
7900
7901 name = bfd_get_section_name (abfd, sec->output_section);
7902 if (! ((CONST_STRNEQ (name, ".sdata")
7903 && (name[6] == 0 || name[6] == '.'))
7904 || (CONST_STRNEQ (name, ".sbss")
7905 && (name[5] == 0 || name[5] == '.'))))
7906 {
7907 (*_bfd_error_handler)
7908 (_("%B: the target (%s) of a %s relocation is "
7909 "in the wrong output section (%s)"),
7910 input_bfd,
7911 sym_name,
7912 howto->name,
7913 name);
7914 }
7915 }
7916 break;
7917
7918 /* Relocate against _SDA2_BASE_. */
7919 case R_PPC_EMB_SDA2REL:
7920 {
7921 const char *name;
7922 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
7923
7924 if (sec == NULL
7925 || sec->output_section == NULL
7926 || !is_static_defined (sda))
7927 {
7928 unresolved_reloc = TRUE;
7929 break;
7930 }
7931 addend -= SYM_VAL (sda);
7932
7933 name = bfd_get_section_name (abfd, sec->output_section);
7934 if (! (CONST_STRNEQ (name, ".sdata2")
7935 || CONST_STRNEQ (name, ".sbss2")))
7936 {
7937 (*_bfd_error_handler)
7938 (_("%B: the target (%s) of a %s relocation is "
7939 "in the wrong output section (%s)"),
7940 input_bfd,
7941 sym_name,
7942 howto->name,
7943 name);
7944 }
7945 }
7946 break;
7947
7948 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7949 case R_PPC_EMB_SDA21:
7950 case R_PPC_EMB_RELSDA:
7951 {
7952 const char *name;
7953 int reg;
7954 struct elf_link_hash_entry *sda = NULL;
7955
7956 if (sec == NULL || sec->output_section == NULL)
7957 {
7958 unresolved_reloc = TRUE;
7959 break;
7960 }
7961
7962 name = bfd_get_section_name (abfd, sec->output_section);
7963 if (((CONST_STRNEQ (name, ".sdata")
7964 && (name[6] == 0 || name[6] == '.'))
7965 || (CONST_STRNEQ (name, ".sbss")
7966 && (name[5] == 0 || name[5] == '.'))))
7967 {
7968 reg = 13;
7969 sda = htab->sdata[0].sym;
7970 }
7971 else if (CONST_STRNEQ (name, ".sdata2")
7972 || CONST_STRNEQ (name, ".sbss2"))
7973 {
7974 reg = 2;
7975 sda = htab->sdata[1].sym;
7976 }
7977 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7978 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7979 {
7980 reg = 0;
7981 }
7982 else
7983 {
7984 (*_bfd_error_handler)
7985 (_("%B: the target (%s) of a %s relocation is "
7986 "in the wrong output section (%s)"),
7987 input_bfd,
7988 sym_name,
7989 howto->name,
7990 name);
7991
7992 bfd_set_error (bfd_error_bad_value);
7993 ret = FALSE;
7994 continue;
7995 }
7996
7997 if (sda != NULL)
7998 {
7999 if (!is_static_defined (sda))
8000 {
8001 unresolved_reloc = TRUE;
8002 break;
8003 }
8004 addend -= SYM_VAL (sda);
8005 }
8006
8007 if (r_type == R_PPC_EMB_SDA21)
8008 {
8009 bfd_vma insn; /* Fill in register field. */
8010
8011 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8012 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8013 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8014 }
8015 }
8016 break;
8017
8018 /* Relocate against the beginning of the section. */
8019 case R_PPC_SECTOFF:
8020 case R_PPC_SECTOFF_LO:
8021 case R_PPC_SECTOFF_HI:
8022 case R_PPC_SECTOFF_HA:
8023 if (sec == NULL || sec->output_section == NULL)
8024 {
8025 unresolved_reloc = TRUE;
8026 break;
8027 }
8028 addend -= sec->output_section->vma;
8029 break;
8030
8031 /* Negative relocations. */
8032 case R_PPC_EMB_NADDR32:
8033 case R_PPC_EMB_NADDR16:
8034 case R_PPC_EMB_NADDR16_LO:
8035 case R_PPC_EMB_NADDR16_HI:
8036 case R_PPC_EMB_NADDR16_HA:
8037 addend -= 2 * relocation;
8038 break;
8039
8040 case R_PPC_COPY:
8041 case R_PPC_GLOB_DAT:
8042 case R_PPC_JMP_SLOT:
8043 case R_PPC_RELATIVE:
8044 case R_PPC_IRELATIVE:
8045 case R_PPC_PLT32:
8046 case R_PPC_PLTREL32:
8047 case R_PPC_PLT16_LO:
8048 case R_PPC_PLT16_HI:
8049 case R_PPC_PLT16_HA:
8050 case R_PPC_ADDR30:
8051 case R_PPC_EMB_RELSEC16:
8052 case R_PPC_EMB_RELST_LO:
8053 case R_PPC_EMB_RELST_HI:
8054 case R_PPC_EMB_RELST_HA:
8055 case R_PPC_EMB_BIT_FLD:
8056 (*_bfd_error_handler)
8057 (_("%B: relocation %s is not yet supported for symbol %s."),
8058 input_bfd,
8059 howto->name,
8060 sym_name);
8061
8062 bfd_set_error (bfd_error_invalid_operation);
8063 ret = FALSE;
8064 continue;
8065 }
8066
8067 /* Do any further special processing. */
8068 switch (r_type)
8069 {
8070 default:
8071 break;
8072
8073 case R_PPC_ADDR16_HA:
8074 case R_PPC_REL16_HA:
8075 case R_PPC_SECTOFF_HA:
8076 case R_PPC_TPREL16_HA:
8077 case R_PPC_DTPREL16_HA:
8078 case R_PPC_EMB_NADDR16_HA:
8079 case R_PPC_EMB_RELST_HA:
8080 /* It's just possible that this symbol is a weak symbol
8081 that's not actually defined anywhere. In that case,
8082 'sec' would be NULL, and we should leave the symbol
8083 alone (it will be set to zero elsewhere in the link). */
8084 if (sec == NULL)
8085 break;
8086 /* Fall thru */
8087
8088 case R_PPC_PLT16_HA:
8089 case R_PPC_GOT16_HA:
8090 case R_PPC_GOT_TLSGD16_HA:
8091 case R_PPC_GOT_TLSLD16_HA:
8092 case R_PPC_GOT_TPREL16_HA:
8093 case R_PPC_GOT_DTPREL16_HA:
8094 /* Add 0x10000 if sign bit in 0:15 is set.
8095 Bits 0:15 are not used. */
8096 addend += 0x8000;
8097 break;
8098 }
8099
8100 #ifdef DEBUG
8101 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8102 "offset = %ld, addend = %ld\n",
8103 howto->name,
8104 (int) r_type,
8105 sym_name,
8106 r_symndx,
8107 (long) rel->r_offset,
8108 (long) addend);
8109 #endif
8110
8111 if (unresolved_reloc
8112 && !((input_section->flags & SEC_DEBUGGING) != 0
8113 && h->def_dynamic))
8114 {
8115 (*_bfd_error_handler)
8116 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
8117 input_bfd,
8118 input_section,
8119 (long) rel->r_offset,
8120 howto->name,
8121 sym_name);
8122 ret = FALSE;
8123 }
8124
8125 r = _bfd_final_link_relocate (howto,
8126 input_bfd,
8127 input_section,
8128 contents,
8129 rel->r_offset,
8130 relocation,
8131 addend);
8132
8133 if (r != bfd_reloc_ok)
8134 {
8135 if (r == bfd_reloc_overflow)
8136 {
8137 if (warned)
8138 continue;
8139 if (h != NULL
8140 && h->root.type == bfd_link_hash_undefweak
8141 && howto->pc_relative)
8142 {
8143 /* Assume this is a call protected by other code that
8144 detect the symbol is undefined. If this is the case,
8145 we can safely ignore the overflow. If not, the
8146 program is hosed anyway, and a little warning isn't
8147 going to help. */
8148
8149 continue;
8150 }
8151
8152 if (! (*info->callbacks->reloc_overflow) (info,
8153 (h ? &h->root : NULL),
8154 sym_name,
8155 howto->name,
8156 rel->r_addend,
8157 input_bfd,
8158 input_section,
8159 rel->r_offset))
8160 return FALSE;
8161 }
8162 else
8163 {
8164 (*_bfd_error_handler)
8165 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
8166 input_bfd, input_section,
8167 (long) rel->r_offset, howto->name, sym_name, (int) r);
8168 ret = FALSE;
8169 }
8170 }
8171 }
8172
8173 #ifdef DEBUG
8174 fprintf (stderr, "\n");
8175 #endif
8176
8177 return ret;
8178 }
8179 \f
8180 /* Finish up dynamic symbol handling. We set the contents of various
8181 dynamic sections here. */
8182
8183 static bfd_boolean
8184 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
8185 struct bfd_link_info *info,
8186 struct elf_link_hash_entry *h,
8187 Elf_Internal_Sym *sym)
8188 {
8189 struct ppc_elf_link_hash_table *htab;
8190 struct plt_entry *ent;
8191 bfd_boolean doneone;
8192
8193 #ifdef DEBUG
8194 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
8195 h->root.root.string);
8196 #endif
8197
8198 htab = ppc_elf_hash_table (info);
8199 BFD_ASSERT (htab->elf.dynobj != NULL);
8200
8201 doneone = FALSE;
8202 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8203 if (ent->plt.offset != (bfd_vma) -1)
8204 {
8205 if (!doneone)
8206 {
8207 Elf_Internal_Rela rela;
8208 bfd_byte *loc;
8209 bfd_vma reloc_index;
8210
8211 if (htab->plt_type == PLT_NEW
8212 || !htab->elf.dynamic_sections_created
8213 || h->dynindx == -1)
8214 reloc_index = ent->plt.offset / 4;
8215 else
8216 {
8217 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
8218 / htab->plt_slot_size);
8219 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8220 && htab->plt_type == PLT_OLD)
8221 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8222 }
8223
8224 /* This symbol has an entry in the procedure linkage table.
8225 Set it up. */
8226 if (htab->plt_type == PLT_VXWORKS
8227 && htab->elf.dynamic_sections_created
8228 && h->dynindx != -1)
8229 {
8230 bfd_vma got_offset;
8231 const bfd_vma *plt_entry;
8232
8233 /* The first three entries in .got.plt are reserved. */
8234 got_offset = (reloc_index + 3) * 4;
8235
8236 /* Use the right PLT. */
8237 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8238 : ppc_elf_vxworks_plt_entry;
8239
8240 /* Fill in the .plt on VxWorks. */
8241 if (info->shared)
8242 {
8243 bfd_put_32 (output_bfd,
8244 plt_entry[0] | PPC_HA (got_offset),
8245 htab->plt->contents + ent->plt.offset + 0);
8246 bfd_put_32 (output_bfd,
8247 plt_entry[1] | PPC_LO (got_offset),
8248 htab->plt->contents + ent->plt.offset + 4);
8249 }
8250 else
8251 {
8252 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8253
8254 bfd_put_32 (output_bfd,
8255 plt_entry[0] | PPC_HA (got_loc),
8256 htab->plt->contents + ent->plt.offset + 0);
8257 bfd_put_32 (output_bfd,
8258 plt_entry[1] | PPC_LO (got_loc),
8259 htab->plt->contents + ent->plt.offset + 4);
8260 }
8261
8262 bfd_put_32 (output_bfd, plt_entry[2],
8263 htab->plt->contents + ent->plt.offset + 8);
8264 bfd_put_32 (output_bfd, plt_entry[3],
8265 htab->plt->contents + ent->plt.offset + 12);
8266
8267 /* This instruction is an immediate load. The value loaded is
8268 the byte offset of the R_PPC_JMP_SLOT relocation from the
8269 start of the .rela.plt section. The value is stored in the
8270 low-order 16 bits of the load instruction. */
8271 /* NOTE: It appears that this is now an index rather than a
8272 prescaled offset. */
8273 bfd_put_32 (output_bfd,
8274 plt_entry[4] | reloc_index,
8275 htab->plt->contents + ent->plt.offset + 16);
8276 /* This instruction is a PC-relative branch whose target is
8277 the start of the PLT section. The address of this branch
8278 instruction is 20 bytes beyond the start of this PLT entry.
8279 The address is encoded in bits 6-29, inclusive. The value
8280 stored is right-shifted by two bits, permitting a 26-bit
8281 offset. */
8282 bfd_put_32 (output_bfd,
8283 (plt_entry[5]
8284 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8285 htab->plt->contents + ent->plt.offset + 20);
8286 bfd_put_32 (output_bfd, plt_entry[6],
8287 htab->plt->contents + ent->plt.offset + 24);
8288 bfd_put_32 (output_bfd, plt_entry[7],
8289 htab->plt->contents + ent->plt.offset + 28);
8290
8291 /* Fill in the GOT entry corresponding to this PLT slot with
8292 the address immediately after the the "bctr" instruction
8293 in this PLT entry. */
8294 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8295 + htab->plt->output_offset
8296 + ent->plt.offset + 16),
8297 htab->sgotplt->contents + got_offset);
8298
8299 if (!info->shared)
8300 {
8301 /* Fill in a couple of entries in .rela.plt.unloaded. */
8302 loc = htab->srelplt2->contents
8303 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8304 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8305 * sizeof (Elf32_External_Rela));
8306
8307 /* Provide the @ha relocation for the first instruction. */
8308 rela.r_offset = (htab->plt->output_section->vma
8309 + htab->plt->output_offset
8310 + ent->plt.offset + 2);
8311 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8312 R_PPC_ADDR16_HA);
8313 rela.r_addend = got_offset;
8314 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8315 loc += sizeof (Elf32_External_Rela);
8316
8317 /* Provide the @l relocation for the second instruction. */
8318 rela.r_offset = (htab->plt->output_section->vma
8319 + htab->plt->output_offset
8320 + ent->plt.offset + 6);
8321 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8322 R_PPC_ADDR16_LO);
8323 rela.r_addend = got_offset;
8324 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8325 loc += sizeof (Elf32_External_Rela);
8326
8327 /* Provide a relocation for the GOT entry corresponding to this
8328 PLT slot. Point it at the middle of the .plt entry. */
8329 rela.r_offset = (htab->sgotplt->output_section->vma
8330 + htab->sgotplt->output_offset
8331 + got_offset);
8332 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8333 R_PPC_ADDR32);
8334 rela.r_addend = ent->plt.offset + 16;
8335 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8336 }
8337
8338 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8339 In particular, the offset for the relocation is not the
8340 address of the PLT entry for this function, as specified
8341 by the ABI. Instead, the offset is set to the address of
8342 the GOT slot for this function. See EABI 4.4.4.1. */
8343 rela.r_offset = (htab->sgotplt->output_section->vma
8344 + htab->sgotplt->output_offset
8345 + got_offset);
8346
8347 }
8348 else
8349 {
8350 asection *splt = htab->plt;
8351 if (!htab->elf.dynamic_sections_created
8352 || h->dynindx == -1)
8353 splt = htab->iplt;
8354
8355 rela.r_offset = (splt->output_section->vma
8356 + splt->output_offset
8357 + ent->plt.offset);
8358 if (htab->plt_type == PLT_OLD
8359 || !htab->elf.dynamic_sections_created
8360 || h->dynindx == -1)
8361 {
8362 /* We don't need to fill in the .plt. The ppc dynamic
8363 linker will fill it in. */
8364 }
8365 else
8366 {
8367 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8368 + htab->glink->output_section->vma
8369 + htab->glink->output_offset);
8370 bfd_put_32 (output_bfd, val,
8371 splt->contents + ent->plt.offset);
8372 }
8373 }
8374
8375 /* Fill in the entry in the .rela.plt section. */
8376 rela.r_addend = 0;
8377 if (!htab->elf.dynamic_sections_created
8378 || h->dynindx == -1)
8379 {
8380 BFD_ASSERT (h->type == STT_GNU_IFUNC
8381 && h->def_regular
8382 && (h->root.type == bfd_link_hash_defined
8383 || h->root.type == bfd_link_hash_defweak));
8384 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8385 rela.r_addend = SYM_VAL (h);
8386 }
8387 else
8388 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8389
8390 if (!htab->elf.dynamic_sections_created
8391 || h->dynindx == -1)
8392 loc = (htab->reliplt->contents
8393 + (htab->reliplt->reloc_count++
8394 * sizeof (Elf32_External_Rela)));
8395 else
8396 loc = (htab->relplt->contents
8397 + reloc_index * sizeof (Elf32_External_Rela));
8398 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8399
8400 if (!h->def_regular)
8401 {
8402 /* Mark the symbol as undefined, rather than as
8403 defined in the .plt section. Leave the value if
8404 there were any relocations where pointer equality
8405 matters (this is a clue for the dynamic linker, to
8406 make function pointer comparisons work between an
8407 application and shared library), otherwise set it
8408 to zero. */
8409 sym->st_shndx = SHN_UNDEF;
8410 if (!h->pointer_equality_needed)
8411 sym->st_value = 0;
8412 else if (!h->ref_regular_nonweak)
8413 {
8414 /* This breaks function pointer comparisons, but
8415 that is better than breaking tests for a NULL
8416 function pointer. */
8417 sym->st_value = 0;
8418 }
8419 }
8420 else if (h->type == STT_GNU_IFUNC
8421 && !info->shared)
8422 {
8423 /* Set the value of ifunc symbols in a non-pie
8424 executable to the glink entry. This is to avoid
8425 text relocations. We can't do this for ifunc in
8426 allocate_dynrelocs, as we do for normal dynamic
8427 function symbols with plt entries, because we need
8428 to keep the original value around for the ifunc
8429 relocation. */
8430 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8431 (output_bfd, htab->glink->output_section));
8432 sym->st_value = (ent->glink_offset +
8433 htab->glink->output_offset
8434 + htab->glink->output_section->vma);
8435 }
8436 doneone = TRUE;
8437 }
8438
8439 if (htab->plt_type == PLT_NEW
8440 || !htab->elf.dynamic_sections_created
8441 || h->dynindx == -1)
8442 {
8443 unsigned char *p;
8444 asection *splt = htab->plt;
8445 if (!htab->elf.dynamic_sections_created
8446 || h->dynindx == -1)
8447 splt = htab->iplt;
8448
8449 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
8450
8451 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
8452 {
8453 bfd_put_32 (output_bfd, LWZ_11_3, p);
8454 p += 4;
8455 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
8456 p += 4;
8457 bfd_put_32 (output_bfd, MR_0_3, p);
8458 p += 4;
8459 bfd_put_32 (output_bfd, CMPWI_11_0, p);
8460 p += 4;
8461 bfd_put_32 (output_bfd, ADD_3_12_2, p);
8462 p += 4;
8463 bfd_put_32 (output_bfd, BEQLR, p);
8464 p += 4;
8465 bfd_put_32 (output_bfd, MR_3_0, p);
8466 p += 4;
8467 bfd_put_32 (output_bfd, NOP, p);
8468 p += 4;
8469 }
8470
8471 write_glink_stub (ent, splt, p, info);
8472
8473 if (!info->shared)
8474 /* We only need one non-PIC glink stub. */
8475 break;
8476 }
8477 else
8478 break;
8479 }
8480
8481 if (h->needs_copy)
8482 {
8483 asection *s;
8484 Elf_Internal_Rela rela;
8485 bfd_byte *loc;
8486
8487 /* This symbols needs a copy reloc. Set it up. */
8488
8489 #ifdef DEBUG
8490 fprintf (stderr, ", copy");
8491 #endif
8492
8493 BFD_ASSERT (h->dynindx != -1);
8494
8495 if (ppc_elf_hash_entry (h)->has_sda_refs)
8496 s = htab->relsbss;
8497 else
8498 s = htab->relbss;
8499 BFD_ASSERT (s != NULL);
8500
8501 rela.r_offset = SYM_VAL (h);
8502 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8503 rela.r_addend = 0;
8504 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8505 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8506 }
8507
8508 #ifdef DEBUG
8509 fprintf (stderr, "\n");
8510 #endif
8511
8512 /* Mark some specially defined symbols as absolute. */
8513 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8514 || (!htab->is_vxworks
8515 && (h == htab->elf.hgot
8516 || strcmp (h->root.root.string,
8517 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8518 sym->st_shndx = SHN_ABS;
8519
8520 return TRUE;
8521 }
8522 \f
8523 static enum elf_reloc_type_class
8524 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8525 {
8526 switch (ELF32_R_TYPE (rela->r_info))
8527 {
8528 case R_PPC_RELATIVE:
8529 return reloc_class_relative;
8530 case R_PPC_REL24:
8531 case R_PPC_ADDR24:
8532 case R_PPC_JMP_SLOT:
8533 return reloc_class_plt;
8534 case R_PPC_COPY:
8535 return reloc_class_copy;
8536 default:
8537 return reloc_class_normal;
8538 }
8539 }
8540 \f
8541 /* Finish up the dynamic sections. */
8542
8543 static bfd_boolean
8544 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8545 struct bfd_link_info *info)
8546 {
8547 asection *sdyn;
8548 asection *splt;
8549 struct ppc_elf_link_hash_table *htab;
8550 bfd_vma got;
8551 bfd *dynobj;
8552 bfd_boolean ret = TRUE;
8553
8554 #ifdef DEBUG
8555 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8556 #endif
8557
8558 htab = ppc_elf_hash_table (info);
8559 dynobj = elf_hash_table (info)->dynobj;
8560 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8561 if (htab->is_vxworks)
8562 splt = bfd_get_section_by_name (dynobj, ".plt");
8563 else
8564 splt = NULL;
8565
8566 got = 0;
8567 if (htab->elf.hgot != NULL)
8568 got = SYM_VAL (htab->elf.hgot);
8569
8570 if (htab->elf.dynamic_sections_created)
8571 {
8572 Elf32_External_Dyn *dyncon, *dynconend;
8573
8574 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8575
8576 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8577 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8578 for (; dyncon < dynconend; dyncon++)
8579 {
8580 Elf_Internal_Dyn dyn;
8581 asection *s;
8582
8583 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8584
8585 switch (dyn.d_tag)
8586 {
8587 case DT_PLTGOT:
8588 if (htab->is_vxworks)
8589 s = htab->sgotplt;
8590 else
8591 s = htab->plt;
8592 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8593 break;
8594
8595 case DT_PLTRELSZ:
8596 dyn.d_un.d_val = htab->relplt->size;
8597 break;
8598
8599 case DT_JMPREL:
8600 s = htab->relplt;
8601 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8602 break;
8603
8604 case DT_PPC_GOT:
8605 dyn.d_un.d_ptr = got;
8606 break;
8607
8608 case DT_RELASZ:
8609 if (htab->is_vxworks)
8610 {
8611 if (htab->relplt)
8612 dyn.d_un.d_ptr -= htab->relplt->size;
8613 break;
8614 }
8615 continue;
8616
8617 default:
8618 if (htab->is_vxworks
8619 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8620 break;
8621 continue;
8622 }
8623
8624 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8625 }
8626 }
8627
8628 if (htab->got != NULL)
8629 {
8630 if (htab->elf.hgot->root.u.def.section == htab->got
8631 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8632 {
8633 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8634
8635 p += htab->elf.hgot->root.u.def.value;
8636 if (htab->plt_type == PLT_OLD)
8637 {
8638 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8639 so that a function can easily find the address of
8640 _GLOBAL_OFFSET_TABLE_. */
8641 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8642 < htab->elf.hgot->root.u.def.section->size);
8643 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8644 }
8645
8646 if (sdyn != NULL)
8647 {
8648 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8649 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8650 < htab->elf.hgot->root.u.def.section->size);
8651 bfd_put_32 (output_bfd, val, p);
8652 }
8653 }
8654 else
8655 {
8656 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
8657 htab->elf.hgot->root.root.string,
8658 (htab->sgotplt != NULL
8659 ? htab->sgotplt->name : htab->got->name));
8660 bfd_set_error (bfd_error_bad_value);
8661 ret = FALSE;
8662 }
8663
8664 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8665 }
8666
8667 /* Fill in the first entry in the VxWorks procedure linkage table. */
8668 if (splt && splt->size > 0)
8669 {
8670 /* Use the right PLT. */
8671 static const bfd_vma *plt_entry = NULL;
8672 plt_entry = info->shared ?
8673 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
8674
8675 if (!info->shared)
8676 {
8677 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8678
8679 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8680 splt->contents + 0);
8681 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8682 splt->contents + 4);
8683 }
8684 else
8685 {
8686 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8687 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8688 }
8689 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8690 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8691 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8692 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8693 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8694 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8695
8696 if (! info->shared)
8697 {
8698 Elf_Internal_Rela rela;
8699 bfd_byte *loc;
8700
8701 loc = htab->srelplt2->contents;
8702
8703 /* Output the @ha relocation for the first instruction. */
8704 rela.r_offset = (htab->plt->output_section->vma
8705 + htab->plt->output_offset
8706 + 2);
8707 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8708 rela.r_addend = 0;
8709 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8710 loc += sizeof (Elf32_External_Rela);
8711
8712 /* Output the @l relocation for the second instruction. */
8713 rela.r_offset = (htab->plt->output_section->vma
8714 + htab->plt->output_offset
8715 + 6);
8716 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8717 rela.r_addend = 0;
8718 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8719 loc += sizeof (Elf32_External_Rela);
8720
8721 /* Fix up the remaining relocations. They may have the wrong
8722 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8723 in which symbols were output. */
8724 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8725 {
8726 Elf_Internal_Rela rel;
8727
8728 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8729 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8730 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8731 loc += sizeof (Elf32_External_Rela);
8732
8733 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8734 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8735 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8736 loc += sizeof (Elf32_External_Rela);
8737
8738 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8739 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8740 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8741 loc += sizeof (Elf32_External_Rela);
8742 }
8743 }
8744 }
8745
8746 if (htab->glink != NULL
8747 && htab->glink->contents != NULL
8748 && htab->elf.dynamic_sections_created)
8749 {
8750 unsigned char *p;
8751 unsigned char *endp;
8752 bfd_vma res0;
8753 unsigned int i;
8754
8755 /*
8756 * PIC glink code is the following:
8757 *
8758 * # ith PLT code stub.
8759 * addis 11,30,(plt+(i-1)*4-got)@ha
8760 * lwz 11,(plt+(i-1)*4-got)@l(11)
8761 * mtctr 11
8762 * bctr
8763 *
8764 * # A table of branches, one for each plt entry.
8765 * # The idea is that the plt call stub loads ctr and r11 with these
8766 * # addresses, so (r11 - res_0) gives the plt index * 4.
8767 * res_0: b PLTresolve
8768 * res_1: b PLTresolve
8769 * .
8770 * # Some number of entries towards the end can be nops
8771 * res_n_m3: nop
8772 * res_n_m2: nop
8773 * res_n_m1:
8774 *
8775 * PLTresolve:
8776 * addis 11,11,(1f-res_0)@ha
8777 * mflr 0
8778 * bcl 20,31,1f
8779 * 1: addi 11,11,(1b-res_0)@l
8780 * mflr 12
8781 * mtlr 0
8782 * sub 11,11,12 # r11 = index * 4
8783 * addis 12,12,(got+4-1b)@ha
8784 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8785 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8786 * mtctr 0
8787 * add 0,11,11
8788 * add 11,0,11 # r11 = index * 12 = reloc offset.
8789 * bctr
8790 */
8791 static const unsigned int pic_plt_resolve[] =
8792 {
8793 ADDIS_11_11,
8794 MFLR_0,
8795 BCL_20_31,
8796 ADDI_11_11,
8797 MFLR_12,
8798 MTLR_0,
8799 SUB_11_11_12,
8800 ADDIS_12_12,
8801 LWZ_0_12,
8802 LWZ_12_12,
8803 MTCTR_0,
8804 ADD_0_11_11,
8805 ADD_11_0_11,
8806 BCTR,
8807 NOP,
8808 NOP
8809 };
8810
8811 /*
8812 * Non-PIC glink code is a little simpler.
8813 *
8814 * # ith PLT code stub.
8815 * lis 11,(plt+(i-1)*4)@ha
8816 * lwz 11,(plt+(i-1)*4)@l(11)
8817 * mtctr 11
8818 * bctr
8819 *
8820 * The branch table is the same, then comes
8821 *
8822 * PLTresolve:
8823 * lis 12,(got+4)@ha
8824 * addis 11,11,(-res_0)@ha
8825 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8826 * addi 11,11,(-res_0)@l # r11 = index * 4
8827 * mtctr 0
8828 * add 0,11,11
8829 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8830 * add 11,0,11 # r11 = index * 12 = reloc offset.
8831 * bctr
8832 */
8833 static const unsigned int plt_resolve[] =
8834 {
8835 LIS_12,
8836 ADDIS_11_11,
8837 LWZ_0_12,
8838 ADDI_11_11,
8839 MTCTR_0,
8840 ADD_0_11_11,
8841 LWZ_12_12,
8842 ADD_11_0_11,
8843 BCTR,
8844 NOP,
8845 NOP,
8846 NOP,
8847 NOP,
8848 NOP,
8849 NOP,
8850 NOP
8851 };
8852
8853 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8854 abort ();
8855 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8856 abort ();
8857
8858 /* Build the branch table, one for each plt entry (less one),
8859 and perhaps some padding. */
8860 p = htab->glink->contents;
8861 p += htab->glink_pltresolve;
8862 endp = htab->glink->contents;
8863 endp += htab->glink->size - GLINK_PLTRESOLVE;
8864 while (p < endp - 8 * 4)
8865 {
8866 bfd_put_32 (output_bfd, B + endp - p, p);
8867 p += 4;
8868 }
8869 while (p < endp)
8870 {
8871 bfd_put_32 (output_bfd, NOP, p);
8872 p += 4;
8873 }
8874
8875 res0 = (htab->glink_pltresolve
8876 + htab->glink->output_section->vma
8877 + htab->glink->output_offset);
8878
8879 /* Last comes the PLTresolve stub. */
8880 if (info->shared)
8881 {
8882 bfd_vma bcl;
8883
8884 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8885 {
8886 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8887 p += 4;
8888 }
8889 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8890
8891 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8892 + htab->glink->output_section->vma
8893 + htab->glink->output_offset);
8894
8895 bfd_put_32 (output_bfd,
8896 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8897 bfd_put_32 (output_bfd,
8898 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8899 bfd_put_32 (output_bfd,
8900 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8901 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8902 {
8903 bfd_put_32 (output_bfd,
8904 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8905 bfd_put_32 (output_bfd,
8906 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8907 }
8908 else
8909 {
8910 bfd_put_32 (output_bfd,
8911 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8912 bfd_put_32 (output_bfd,
8913 LWZ_12_12 + 4, p + 9*4);
8914 }
8915 }
8916 else
8917 {
8918 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8919 {
8920 bfd_put_32 (output_bfd, plt_resolve[i], p);
8921 p += 4;
8922 }
8923 p -= 4 * ARRAY_SIZE (plt_resolve);
8924
8925 bfd_put_32 (output_bfd,
8926 LIS_12 + PPC_HA (got + 4), p + 0*4);
8927 bfd_put_32 (output_bfd,
8928 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8929 bfd_put_32 (output_bfd,
8930 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8931 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8932 {
8933 bfd_put_32 (output_bfd,
8934 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8935 bfd_put_32 (output_bfd,
8936 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8937 }
8938 else
8939 {
8940 bfd_put_32 (output_bfd,
8941 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8942 bfd_put_32 (output_bfd,
8943 LWZ_12_12 + 4, p + 6*4);
8944 }
8945 }
8946 }
8947
8948 return ret;
8949 }
8950 \f
8951 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8952 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8953 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8954 #define TARGET_BIG_NAME "elf32-powerpc"
8955 #define ELF_ARCH bfd_arch_powerpc
8956 #define ELF_MACHINE_CODE EM_PPC
8957 #ifdef __QNXTARGET__
8958 #define ELF_MAXPAGESIZE 0x1000
8959 #else
8960 #define ELF_MAXPAGESIZE 0x10000
8961 #endif
8962 #define ELF_MINPAGESIZE 0x1000
8963 #define ELF_COMMONPAGESIZE 0x1000
8964 #define elf_info_to_howto ppc_elf_info_to_howto
8965
8966 #ifdef EM_CYGNUS_POWERPC
8967 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8968 #endif
8969
8970 #ifdef EM_PPC_OLD
8971 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8972 #endif
8973
8974 #define elf_backend_plt_not_loaded 1
8975 #define elf_backend_can_gc_sections 1
8976 #define elf_backend_can_refcount 1
8977 #define elf_backend_rela_normal 1
8978
8979 #define bfd_elf32_mkobject ppc_elf_mkobject
8980 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8981 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8982 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8983 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8984 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8985 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8986 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8987
8988 #define elf_backend_object_p ppc_elf_object_p
8989 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8990 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8991 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8992 #define elf_backend_relocate_section ppc_elf_relocate_section
8993 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8994 #define elf_backend_check_relocs ppc_elf_check_relocs
8995 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8996 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8997 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8998 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8999 #define elf_backend_hash_symbol ppc_elf_hash_symbol
9000 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
9001 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
9002 #define elf_backend_fake_sections ppc_elf_fake_sections
9003 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
9004 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
9005 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
9006 #define elf_backend_write_core_note ppc_elf_write_core_note
9007 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
9008 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
9009 #define elf_backend_final_write_processing ppc_elf_final_write_processing
9010 #define elf_backend_write_section ppc_elf_write_section
9011 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
9012 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
9013 #define elf_backend_action_discarded ppc_elf_action_discarded
9014 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
9015 #define elf_backend_post_process_headers _bfd_elf_set_osabi
9016
9017 #include "elf32-target.h"
9018
9019 /* VxWorks Target */
9020
9021 #undef TARGET_LITTLE_SYM
9022 #undef TARGET_LITTLE_NAME
9023
9024 #undef TARGET_BIG_SYM
9025 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
9026 #undef TARGET_BIG_NAME
9027 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
9028
9029 /* VxWorks uses the elf default section flags for .plt. */
9030 static const struct bfd_elf_special_section *
9031 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9032 {
9033 if (sec->name == NULL)
9034 return NULL;
9035
9036 if (strcmp (sec->name, ".plt") == 0)
9037 return _bfd_elf_get_sec_type_attr (abfd, sec);
9038
9039 return ppc_elf_get_sec_type_attr (abfd, sec);
9040 }
9041
9042 /* Like ppc_elf_link_hash_table_create, but overrides
9043 appropriately for VxWorks. */
9044 static struct bfd_link_hash_table *
9045 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9046 {
9047 struct bfd_link_hash_table *ret;
9048
9049 ret = ppc_elf_link_hash_table_create (abfd);
9050 if (ret)
9051 {
9052 struct ppc_elf_link_hash_table *htab
9053 = (struct ppc_elf_link_hash_table *)ret;
9054 htab->is_vxworks = 1;
9055 htab->plt_type = PLT_VXWORKS;
9056 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
9057 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
9058 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
9059 }
9060 return ret;
9061 }
9062
9063 /* Tweak magic VxWorks symbols as they are loaded. */
9064 static bfd_boolean
9065 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
9066 struct bfd_link_info *info,
9067 Elf_Internal_Sym *sym,
9068 const char **namep ATTRIBUTE_UNUSED,
9069 flagword *flagsp ATTRIBUTE_UNUSED,
9070 asection **secp,
9071 bfd_vma *valp)
9072 {
9073 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
9074 valp))
9075 return FALSE;
9076
9077 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
9078 }
9079
9080 static void
9081 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
9082 {
9083 ppc_elf_final_write_processing(abfd, linker);
9084 elf_vxworks_final_write_processing(abfd, linker);
9085 }
9086
9087 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
9088 define it. */
9089 #undef elf_backend_want_plt_sym
9090 #define elf_backend_want_plt_sym 1
9091 #undef elf_backend_want_got_plt
9092 #define elf_backend_want_got_plt 1
9093 #undef elf_backend_got_symbol_offset
9094 #define elf_backend_got_symbol_offset 0
9095 #undef elf_backend_plt_not_loaded
9096 #define elf_backend_plt_not_loaded 0
9097 #undef elf_backend_plt_readonly
9098 #define elf_backend_plt_readonly 1
9099 #undef elf_backend_got_header_size
9100 #define elf_backend_got_header_size 12
9101
9102 #undef bfd_elf32_get_synthetic_symtab
9103
9104 #undef bfd_elf32_bfd_link_hash_table_create
9105 #define bfd_elf32_bfd_link_hash_table_create \
9106 ppc_elf_vxworks_link_hash_table_create
9107 #undef elf_backend_add_symbol_hook
9108 #define elf_backend_add_symbol_hook \
9109 ppc_elf_vxworks_add_symbol_hook
9110 #undef elf_backend_link_output_symbol_hook
9111 #define elf_backend_link_output_symbol_hook \
9112 elf_vxworks_link_output_symbol_hook
9113 #undef elf_backend_final_write_processing
9114 #define elf_backend_final_write_processing \
9115 ppc_elf_vxworks_final_write_processing
9116 #undef elf_backend_get_sec_type_attr
9117 #define elf_backend_get_sec_type_attr \
9118 ppc_elf_vxworks_get_sec_type_attr
9119 #undef elf_backend_emit_relocs
9120 #define elf_backend_emit_relocs \
9121 elf_vxworks_emit_relocs
9122
9123 #undef elf32_bed
9124 #define elf32_bed ppc_elf_vxworks_bed
9125 #undef elf_backend_post_process_headers
9126
9127 #include "elf32-target.h"
GDB Binutils - Deliverables
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