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* dw2gencfi.c (tc_cfi_endproc): Avoid "set but not used" error.
[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 FALSE, /* 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_DATA)
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_DATA);
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_lwpid = 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_SORT_ENTRIES) != 0)
1998 shdr->sh_type = SHT_ORDERED;
1999
2000 return TRUE;
2001 }
2002
2003 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2004 need to bump up the number of section headers. */
2005
2006 static int
2007 ppc_elf_additional_program_headers (bfd *abfd,
2008 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2009 {
2010 asection *s;
2011 int ret = 0;
2012
2013 s = bfd_get_section_by_name (abfd, ".sbss2");
2014 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2015 ++ret;
2016
2017 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2018 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2019 ++ret;
2020
2021 return ret;
2022 }
2023
2024 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2025 .PPC.EMB.sbss0 a normal section, and not a bss section so
2026 that the linker doesn't crater when trying to make more than
2027 2 sections. */
2028
2029 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2030 {
2031 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2032 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2033 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2034 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2035 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2036 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2037 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2038 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2039 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2040 { NULL, 0, 0, 0, 0 }
2041 };
2042
2043 /* This is what we want for new plt/got. */
2044 static struct bfd_elf_special_section ppc_alt_plt =
2045 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2046
2047 static const struct bfd_elf_special_section *
2048 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2049 {
2050 const struct bfd_elf_special_section *ssect;
2051
2052 /* See if this is one of the special sections. */
2053 if (sec->name == NULL)
2054 return NULL;
2055
2056 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2057 sec->use_rela_p);
2058 if (ssect != NULL)
2059 {
2060 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2061 ssect = &ppc_alt_plt;
2062 return ssect;
2063 }
2064
2065 return _bfd_elf_get_sec_type_attr (abfd, sec);
2066 }
2067 \f
2068 /* Very simple linked list structure for recording apuinfo values. */
2069 typedef struct apuinfo_list
2070 {
2071 struct apuinfo_list *next;
2072 unsigned long value;
2073 }
2074 apuinfo_list;
2075
2076 static apuinfo_list *head;
2077 static bfd_boolean apuinfo_set;
2078
2079 static void
2080 apuinfo_list_init (void)
2081 {
2082 head = NULL;
2083 apuinfo_set = FALSE;
2084 }
2085
2086 static void
2087 apuinfo_list_add (unsigned long value)
2088 {
2089 apuinfo_list *entry = head;
2090
2091 while (entry != NULL)
2092 {
2093 if (entry->value == value)
2094 return;
2095 entry = entry->next;
2096 }
2097
2098 entry = bfd_malloc (sizeof (* entry));
2099 if (entry == NULL)
2100 return;
2101
2102 entry->value = value;
2103 entry->next = head;
2104 head = entry;
2105 }
2106
2107 static unsigned
2108 apuinfo_list_length (void)
2109 {
2110 apuinfo_list *entry;
2111 unsigned long count;
2112
2113 for (entry = head, count = 0;
2114 entry;
2115 entry = entry->next)
2116 ++ count;
2117
2118 return count;
2119 }
2120
2121 static inline unsigned long
2122 apuinfo_list_element (unsigned long number)
2123 {
2124 apuinfo_list * entry;
2125
2126 for (entry = head;
2127 entry && number --;
2128 entry = entry->next)
2129 ;
2130
2131 return entry ? entry->value : 0;
2132 }
2133
2134 static void
2135 apuinfo_list_finish (void)
2136 {
2137 apuinfo_list *entry;
2138
2139 for (entry = head; entry;)
2140 {
2141 apuinfo_list *next = entry->next;
2142 free (entry);
2143 entry = next;
2144 }
2145
2146 head = NULL;
2147 }
2148
2149 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2150 #define APUINFO_LABEL "APUinfo"
2151
2152 /* Scan the input BFDs and create a linked list of
2153 the APUinfo values that will need to be emitted. */
2154
2155 static void
2156 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2157 {
2158 bfd *ibfd;
2159 asection *asec;
2160 char *buffer = NULL;
2161 bfd_size_type largest_input_size = 0;
2162 unsigned i;
2163 unsigned long length;
2164 const char *error_message = NULL;
2165
2166 if (link_info == NULL)
2167 return;
2168
2169 apuinfo_list_init ();
2170
2171 /* Read in the input sections contents. */
2172 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2173 {
2174 unsigned long datum;
2175
2176 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2177 if (asec == NULL)
2178 continue;
2179
2180 error_message = _("corrupt %s section in %B");
2181 length = asec->size;
2182 if (length < 20)
2183 goto fail;
2184
2185 apuinfo_set = TRUE;
2186 if (largest_input_size < asec->size)
2187 {
2188 if (buffer)
2189 free (buffer);
2190 largest_input_size = asec->size;
2191 buffer = bfd_malloc (largest_input_size);
2192 if (!buffer)
2193 return;
2194 }
2195
2196 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2197 || (bfd_bread (buffer, length, ibfd) != length))
2198 {
2199 error_message = _("unable to read in %s section from %B");
2200 goto fail;
2201 }
2202
2203 /* Verify the contents of the header. Note - we have to
2204 extract the values this way in order to allow for a
2205 host whose endian-ness is different from the target. */
2206 datum = bfd_get_32 (ibfd, buffer);
2207 if (datum != sizeof APUINFO_LABEL)
2208 goto fail;
2209
2210 datum = bfd_get_32 (ibfd, buffer + 8);
2211 if (datum != 0x2)
2212 goto fail;
2213
2214 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2215 goto fail;
2216
2217 /* Get the number of bytes used for apuinfo entries. */
2218 datum = bfd_get_32 (ibfd, buffer + 4);
2219 if (datum + 20 != length)
2220 goto fail;
2221
2222 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2223 for (i = 0; i < datum; i += 4)
2224 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2225 }
2226
2227 error_message = NULL;
2228
2229 if (apuinfo_set)
2230 {
2231 /* Compute the size of the output section. */
2232 unsigned num_entries = apuinfo_list_length ();
2233
2234 /* Set the output section size, if it exists. */
2235 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2236
2237 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2238 {
2239 ibfd = abfd;
2240 error_message = _("warning: unable to set size of %s section in %B");
2241 }
2242 }
2243
2244 fail:
2245 if (buffer)
2246 free (buffer);
2247
2248 if (error_message)
2249 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2250 }
2251
2252 /* Prevent the output section from accumulating the input sections'
2253 contents. We have already stored this in our linked list structure. */
2254
2255 static bfd_boolean
2256 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2257 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2258 asection *asec,
2259 bfd_byte *contents ATTRIBUTE_UNUSED)
2260 {
2261 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2262 }
2263
2264 /* Finally we can generate the output section. */
2265
2266 static void
2267 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2268 {
2269 bfd_byte *buffer;
2270 asection *asec;
2271 unsigned i;
2272 unsigned num_entries;
2273 bfd_size_type length;
2274
2275 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2276 if (asec == NULL)
2277 return;
2278
2279 if (!apuinfo_set)
2280 return;
2281
2282 length = asec->size;
2283 if (length < 20)
2284 return;
2285
2286 buffer = bfd_malloc (length);
2287 if (buffer == NULL)
2288 {
2289 (*_bfd_error_handler)
2290 (_("failed to allocate space for new APUinfo section."));
2291 return;
2292 }
2293
2294 /* Create the apuinfo header. */
2295 num_entries = apuinfo_list_length ();
2296 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2297 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2298 bfd_put_32 (abfd, 0x2, buffer + 8);
2299 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2300
2301 length = 20;
2302 for (i = 0; i < num_entries; i++)
2303 {
2304 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2305 length += 4;
2306 }
2307
2308 if (length != asec->size)
2309 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2310
2311 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2312 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2313
2314 free (buffer);
2315
2316 apuinfo_list_finish ();
2317 }
2318 \f
2319 static bfd_boolean
2320 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2321 {
2322 bfd_byte buf[GLINK_ENTRY_SIZE];
2323
2324 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2325 return FALSE;
2326
2327 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2328 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2329 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2330 && bfd_get_32 (abfd, buf + 12) == BCTR);
2331 }
2332
2333 static bfd_boolean
2334 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2335 {
2336 bfd_vma vma = *(bfd_vma *) ptr;
2337 return ((section->flags & SEC_ALLOC) != 0
2338 && section->vma <= vma
2339 && vma < section->vma + section->size);
2340 }
2341
2342 static long
2343 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2344 long dynsymcount, asymbol **dynsyms,
2345 asymbol **ret)
2346 {
2347 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2348 asection *plt, *relplt, *dynamic, *glink;
2349 bfd_vma glink_vma = 0;
2350 bfd_vma resolv_vma = 0;
2351 bfd_vma stub_vma;
2352 asymbol *s;
2353 arelent *p;
2354 long count, i;
2355 size_t size;
2356 char *names;
2357 bfd_byte buf[4];
2358
2359 *ret = NULL;
2360
2361 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2362 return 0;
2363
2364 if (dynsymcount <= 0)
2365 return 0;
2366
2367 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2368 if (relplt == NULL)
2369 return 0;
2370
2371 plt = bfd_get_section_by_name (abfd, ".plt");
2372 if (plt == NULL)
2373 return 0;
2374
2375 /* Call common code to handle old-style executable PLTs. */
2376 if (elf_section_flags (plt) & SHF_EXECINSTR)
2377 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2378 dynsymcount, dynsyms, ret);
2379
2380 /* If this object was prelinked, the prelinker stored the address
2381 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2382 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2383 if (dynamic != NULL)
2384 {
2385 bfd_byte *dynbuf, *extdyn, *extdynend;
2386 size_t extdynsize;
2387 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2388
2389 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2390 return -1;
2391
2392 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2393 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2394
2395 extdyn = dynbuf;
2396 extdynend = extdyn + dynamic->size;
2397 for (; extdyn < extdynend; extdyn += extdynsize)
2398 {
2399 Elf_Internal_Dyn dyn;
2400 (*swap_dyn_in) (abfd, extdyn, &dyn);
2401
2402 if (dyn.d_tag == DT_NULL)
2403 break;
2404
2405 if (dyn.d_tag == DT_PPC_GOT)
2406 {
2407 unsigned int g_o_t = dyn.d_un.d_val;
2408 asection *got = bfd_get_section_by_name (abfd, ".got");
2409 if (got != NULL
2410 && bfd_get_section_contents (abfd, got, buf,
2411 g_o_t - got->vma + 4, 4))
2412 glink_vma = bfd_get_32 (abfd, buf);
2413 break;
2414 }
2415 }
2416 free (dynbuf);
2417 }
2418
2419 /* Otherwise we read the first plt entry. */
2420 if (glink_vma == 0)
2421 {
2422 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2423 glink_vma = bfd_get_32 (abfd, buf);
2424 }
2425
2426 if (glink_vma == 0)
2427 return 0;
2428
2429 /* The .glink section usually does not survive the final
2430 link; search for the section (usually .text) where the
2431 glink stubs now reside. */
2432 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2433 if (glink == NULL)
2434 return 0;
2435
2436 /* Determine glink PLT resolver by reading the relative branch
2437 from the first glink stub. */
2438 if (bfd_get_section_contents (abfd, glink, buf,
2439 glink_vma - glink->vma, 4))
2440 {
2441 unsigned int insn = bfd_get_32 (abfd, buf);
2442
2443 /* The first glink stub may either branch to the resolver ... */
2444 insn ^= B;
2445 if ((insn & ~0x3fffffc) == 0)
2446 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2447
2448 /* ... or fall through a bunch of NOPs. */
2449 else if ((insn ^ B ^ NOP) == 0)
2450 for (i = 4;
2451 bfd_get_section_contents (abfd, glink, buf,
2452 glink_vma - glink->vma + i, 4);
2453 i += 4)
2454 if (bfd_get_32 (abfd, buf) != NOP)
2455 {
2456 resolv_vma = glink_vma + i;
2457 break;
2458 }
2459 }
2460
2461 count = relplt->size / sizeof (Elf32_External_Rela);
2462 stub_vma = glink_vma - (bfd_vma) count * 16;
2463 /* If the stubs are those for -shared/-pie then we might have
2464 multiple stubs for each plt entry. If that is the case then
2465 there is no way to associate stubs with their plt entries short
2466 of figuring out the GOT pointer value used in the stub. */
2467 if (!is_nonpic_glink_stub (abfd, glink,
2468 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2469 return 0;
2470
2471 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2472 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2473 return -1;
2474
2475 size = count * sizeof (asymbol);
2476 p = relplt->relocation;
2477 for (i = 0; i < count; i++, p++)
2478 {
2479 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2480 if (p->addend != 0)
2481 size += sizeof ("+0x") - 1 + 8;
2482 }
2483
2484 size += sizeof (asymbol) + sizeof ("__glink");
2485
2486 if (resolv_vma)
2487 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2488
2489 s = *ret = bfd_malloc (size);
2490 if (s == NULL)
2491 return -1;
2492
2493 names = (char *) (s + count + 1 + (resolv_vma != 0));
2494 p = relplt->relocation;
2495 for (i = 0; i < count; i++, p++)
2496 {
2497 size_t len;
2498
2499 *s = **p->sym_ptr_ptr;
2500 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2501 we are defining a symbol, ensure one of them is set. */
2502 if ((s->flags & BSF_LOCAL) == 0)
2503 s->flags |= BSF_GLOBAL;
2504 s->flags |= BSF_SYNTHETIC;
2505 s->section = glink;
2506 s->value = stub_vma - glink->vma;
2507 s->name = names;
2508 s->udata.p = NULL;
2509 len = strlen ((*p->sym_ptr_ptr)->name);
2510 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2511 names += len;
2512 if (p->addend != 0)
2513 {
2514 memcpy (names, "+0x", sizeof ("+0x") - 1);
2515 names += sizeof ("+0x") - 1;
2516 bfd_sprintf_vma (abfd, names, p->addend);
2517 names += strlen (names);
2518 }
2519 memcpy (names, "@plt", sizeof ("@plt"));
2520 names += sizeof ("@plt");
2521 ++s;
2522 stub_vma += 16;
2523 }
2524
2525 /* Add a symbol at the start of the glink branch table. */
2526 memset (s, 0, sizeof *s);
2527 s->the_bfd = abfd;
2528 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2529 s->section = glink;
2530 s->value = glink_vma - glink->vma;
2531 s->name = names;
2532 memcpy (names, "__glink", sizeof ("__glink"));
2533 names += sizeof ("__glink");
2534 s++;
2535 count++;
2536
2537 if (resolv_vma)
2538 {
2539 /* Add a symbol for the glink PLT resolver. */
2540 memset (s, 0, sizeof *s);
2541 s->the_bfd = abfd;
2542 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2543 s->section = glink;
2544 s->value = resolv_vma - glink->vma;
2545 s->name = names;
2546 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2547 names += sizeof ("__glink_PLTresolve");
2548 s++;
2549 count++;
2550 }
2551
2552 return count;
2553 }
2554 \f
2555 /* The following functions are specific to the ELF linker, while
2556 functions above are used generally. They appear in this file more
2557 or less in the order in which they are called. eg.
2558 ppc_elf_check_relocs is called early in the link process,
2559 ppc_elf_finish_dynamic_sections is one of the last functions
2560 called. */
2561
2562 /* The PPC linker needs to keep track of the number of relocs that it
2563 decides to copy as dynamic relocs in check_relocs for each symbol.
2564 This is so that it can later discard them if they are found to be
2565 unnecessary. We store the information in a field extending the
2566 regular ELF linker hash table. */
2567
2568 struct ppc_elf_dyn_relocs
2569 {
2570 struct ppc_elf_dyn_relocs *next;
2571
2572 /* The input section of the reloc. */
2573 asection *sec;
2574
2575 /* Total number of relocs copied for the input section. */
2576 bfd_size_type count;
2577
2578 /* Number of pc-relative relocs copied for the input section. */
2579 bfd_size_type pc_count;
2580 };
2581
2582 /* Track PLT entries needed for a given symbol. We might need more
2583 than one glink entry per symbol when generating a pic binary. */
2584 struct plt_entry
2585 {
2586 struct plt_entry *next;
2587
2588 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2589 This field stores the offset into .got2 used to initialise the
2590 GOT pointer reg. It will always be at least 32768. (Current
2591 gcc always uses an offset of 32768, but ld -r will pack .got2
2592 sections together resulting in larger offsets). */
2593 bfd_vma addend;
2594
2595 /* The .got2 section. */
2596 asection *sec;
2597
2598 /* PLT refcount or offset. */
2599 union
2600 {
2601 bfd_signed_vma refcount;
2602 bfd_vma offset;
2603 } plt;
2604
2605 /* .glink stub offset. */
2606 bfd_vma glink_offset;
2607 };
2608
2609 /* Of those relocs that might be copied as dynamic relocs, this function
2610 selects those that must be copied when linking a shared library,
2611 even when the symbol is local. */
2612
2613 static int
2614 must_be_dyn_reloc (struct bfd_link_info *info,
2615 enum elf_ppc_reloc_type r_type)
2616 {
2617 switch (r_type)
2618 {
2619 default:
2620 return 1;
2621
2622 case R_PPC_REL24:
2623 case R_PPC_REL14:
2624 case R_PPC_REL14_BRTAKEN:
2625 case R_PPC_REL14_BRNTAKEN:
2626 case R_PPC_REL32:
2627 return 0;
2628
2629 case R_PPC_TPREL32:
2630 case R_PPC_TPREL16:
2631 case R_PPC_TPREL16_LO:
2632 case R_PPC_TPREL16_HI:
2633 case R_PPC_TPREL16_HA:
2634 return !info->executable;
2635 }
2636 }
2637
2638 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2639 copying dynamic variables from a shared lib into an app's dynbss
2640 section, and instead use a dynamic relocation to point into the
2641 shared lib. */
2642 #define ELIMINATE_COPY_RELOCS 1
2643
2644 /* PPC ELF linker hash entry. */
2645
2646 struct ppc_elf_link_hash_entry
2647 {
2648 struct elf_link_hash_entry elf;
2649
2650 /* If this symbol is used in the linker created sections, the processor
2651 specific backend uses this field to map the field into the offset
2652 from the beginning of the section. */
2653 elf_linker_section_pointers_t *linker_section_pointer;
2654
2655 /* Track dynamic relocs copied for this symbol. */
2656 struct ppc_elf_dyn_relocs *dyn_relocs;
2657
2658 /* Contexts in which symbol is used in the GOT (or TOC).
2659 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2660 corresponding relocs are encountered during check_relocs.
2661 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2662 indicate the corresponding GOT entry type is not needed. */
2663 #define TLS_GD 1 /* GD reloc. */
2664 #define TLS_LD 2 /* LD reloc. */
2665 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2666 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2667 #define TLS_TLS 16 /* Any TLS reloc. */
2668 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2669 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
2670 char tls_mask;
2671
2672 /* Nonzero if we have seen a small data relocation referring to this
2673 symbol. */
2674 unsigned char has_sda_refs;
2675 };
2676
2677 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2678
2679 /* PPC ELF linker hash table. */
2680
2681 struct ppc_elf_link_hash_table
2682 {
2683 struct elf_link_hash_table elf;
2684
2685 /* Short-cuts to get to dynamic linker sections. */
2686 asection *got;
2687 asection *relgot;
2688 asection *glink;
2689 asection *plt;
2690 asection *relplt;
2691 asection *iplt;
2692 asection *reliplt;
2693 asection *dynbss;
2694 asection *relbss;
2695 asection *dynsbss;
2696 asection *relsbss;
2697 elf_linker_section_t sdata[2];
2698 asection *sbss;
2699
2700 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2701 asection *srelplt2;
2702
2703 /* The .got.plt section (VxWorks only)*/
2704 asection *sgotplt;
2705
2706 /* Shortcut to __tls_get_addr. */
2707 struct elf_link_hash_entry *tls_get_addr;
2708
2709 /* The bfd that forced an old-style PLT. */
2710 bfd *old_bfd;
2711
2712 /* TLS local dynamic got entry handling. */
2713 union {
2714 bfd_signed_vma refcount;
2715 bfd_vma offset;
2716 } tlsld_got;
2717
2718 /* Offset of branch table to PltResolve function in glink. */
2719 bfd_vma glink_pltresolve;
2720
2721 /* Size of reserved GOT entries. */
2722 unsigned int got_header_size;
2723 /* Non-zero if allocating the header left a gap. */
2724 unsigned int got_gap;
2725
2726 /* The type of PLT we have chosen to use. */
2727 enum ppc_elf_plt_type plt_type;
2728
2729 /* Set if we should emit symbols for stubs. */
2730 unsigned int emit_stub_syms:1;
2731
2732 /* Set if __tls_get_addr optimization should not be done. */
2733 unsigned int no_tls_get_addr_opt:1;
2734
2735 /* True if the target system is VxWorks. */
2736 unsigned int is_vxworks:1;
2737
2738 /* The size of PLT entries. */
2739 int plt_entry_size;
2740 /* The distance between adjacent PLT slots. */
2741 int plt_slot_size;
2742 /* The size of the first PLT entry. */
2743 int plt_initial_entry_size;
2744
2745 /* Small local sym cache. */
2746 struct sym_cache sym_cache;
2747 };
2748
2749 /* Rename some of the generic section flags to better document how they
2750 are used here. */
2751
2752 /* Nonzero if this section has TLS related relocations. */
2753 #define has_tls_reloc sec_flg0
2754
2755 /* Nonzero if this section has a call to __tls_get_addr. */
2756 #define has_tls_get_addr_call sec_flg1
2757
2758 /* Get the PPC ELF linker hash table from a link_info structure. */
2759
2760 #define ppc_elf_hash_table(p) \
2761 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
2762 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
2763
2764 /* Create an entry in a PPC ELF linker hash table. */
2765
2766 static struct bfd_hash_entry *
2767 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2768 struct bfd_hash_table *table,
2769 const char *string)
2770 {
2771 /* Allocate the structure if it has not already been allocated by a
2772 subclass. */
2773 if (entry == NULL)
2774 {
2775 entry = bfd_hash_allocate (table,
2776 sizeof (struct ppc_elf_link_hash_entry));
2777 if (entry == NULL)
2778 return entry;
2779 }
2780
2781 /* Call the allocation method of the superclass. */
2782 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2783 if (entry != NULL)
2784 {
2785 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2786 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2787 ppc_elf_hash_entry (entry)->tls_mask = 0;
2788 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
2789 }
2790
2791 return entry;
2792 }
2793
2794 /* Create a PPC ELF linker hash table. */
2795
2796 static struct bfd_link_hash_table *
2797 ppc_elf_link_hash_table_create (bfd *abfd)
2798 {
2799 struct ppc_elf_link_hash_table *ret;
2800
2801 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2802 if (ret == NULL)
2803 return NULL;
2804
2805 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2806 ppc_elf_link_hash_newfunc,
2807 sizeof (struct ppc_elf_link_hash_entry),
2808 PPC32_ELF_DATA))
2809 {
2810 free (ret);
2811 return NULL;
2812 }
2813
2814 ret->elf.init_plt_refcount.refcount = 0;
2815 ret->elf.init_plt_refcount.glist = NULL;
2816 ret->elf.init_plt_offset.offset = 0;
2817 ret->elf.init_plt_offset.glist = NULL;
2818
2819 ret->sdata[0].name = ".sdata";
2820 ret->sdata[0].sym_name = "_SDA_BASE_";
2821 ret->sdata[0].bss_name = ".sbss";
2822
2823 ret->sdata[1].name = ".sdata2";
2824 ret->sdata[1].sym_name = "_SDA2_BASE_";
2825 ret->sdata[1].bss_name = ".sbss2";
2826
2827 ret->plt_entry_size = 12;
2828 ret->plt_slot_size = 8;
2829 ret->plt_initial_entry_size = 72;
2830
2831 return &ret->elf.root;
2832 }
2833
2834 /* Create .got and the related sections. */
2835
2836 static bfd_boolean
2837 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2838 {
2839 struct ppc_elf_link_hash_table *htab;
2840 asection *s;
2841 flagword flags;
2842
2843 if (!_bfd_elf_create_got_section (abfd, info))
2844 return FALSE;
2845
2846 htab = ppc_elf_hash_table (info);
2847 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2848 if (s == NULL)
2849 abort ();
2850
2851 if (htab->is_vxworks)
2852 {
2853 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2854 if (!htab->sgotplt)
2855 abort ();
2856 }
2857 else
2858 {
2859 /* The powerpc .got has a blrl instruction in it. Mark it
2860 executable. */
2861 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2862 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2863 if (!bfd_set_section_flags (abfd, s, flags))
2864 return FALSE;
2865 }
2866
2867 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2868 if (!htab->relgot)
2869 abort ();
2870
2871 return TRUE;
2872 }
2873
2874 static bfd_boolean
2875 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2876 {
2877 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2878 asection *s;
2879 flagword flags;
2880
2881 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2882 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2883 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2884 htab->glink = s;
2885 if (s == NULL
2886 || !bfd_set_section_alignment (abfd, s, 4))
2887 return FALSE;
2888
2889 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2890 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2891 htab->iplt = s;
2892 if (s == NULL
2893 || !bfd_set_section_alignment (abfd, s, 4))
2894 return FALSE;
2895
2896 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2897 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2898 s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags);
2899 htab->reliplt = s;
2900 if (s == NULL
2901 || ! bfd_set_section_alignment (abfd, s, 2))
2902 return FALSE;
2903 return TRUE;
2904 }
2905
2906 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2907 to output sections (just like _bfd_elf_create_dynamic_sections has
2908 to create .dynbss and .rela.bss). */
2909
2910 static bfd_boolean
2911 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2912 {
2913 struct ppc_elf_link_hash_table *htab;
2914 asection *s;
2915 flagword flags;
2916
2917 htab = ppc_elf_hash_table (info);
2918
2919 if (htab->got == NULL
2920 && !ppc_elf_create_got (abfd, info))
2921 return FALSE;
2922
2923 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2924 return FALSE;
2925
2926 if (htab->glink == NULL
2927 && !ppc_elf_create_glink (abfd, info))
2928 return FALSE;
2929
2930 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2931 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2932 SEC_ALLOC | SEC_LINKER_CREATED);
2933 htab->dynsbss = s;
2934 if (s == NULL)
2935 return FALSE;
2936
2937 if (! info->shared)
2938 {
2939 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2940 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2941 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2942 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2943 htab->relsbss = s;
2944 if (s == NULL
2945 || ! bfd_set_section_alignment (abfd, s, 2))
2946 return FALSE;
2947 }
2948
2949 if (htab->is_vxworks
2950 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2951 return FALSE;
2952
2953 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2954 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2955 if (s == NULL)
2956 abort ();
2957
2958 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2959 if (htab->plt_type == PLT_VXWORKS)
2960 /* The VxWorks PLT is a loaded section with contents. */
2961 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2962 return bfd_set_section_flags (abfd, s, flags);
2963 }
2964
2965 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2966
2967 static void
2968 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2969 struct elf_link_hash_entry *dir,
2970 struct elf_link_hash_entry *ind)
2971 {
2972 struct ppc_elf_link_hash_entry *edir, *eind;
2973
2974 edir = (struct ppc_elf_link_hash_entry *) dir;
2975 eind = (struct ppc_elf_link_hash_entry *) ind;
2976
2977 if (eind->dyn_relocs != NULL)
2978 {
2979 if (edir->dyn_relocs != NULL)
2980 {
2981 struct ppc_elf_dyn_relocs **pp;
2982 struct ppc_elf_dyn_relocs *p;
2983
2984 /* Add reloc counts against the indirect sym to the direct sym
2985 list. Merge any entries against the same section. */
2986 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2987 {
2988 struct ppc_elf_dyn_relocs *q;
2989
2990 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2991 if (q->sec == p->sec)
2992 {
2993 q->pc_count += p->pc_count;
2994 q->count += p->count;
2995 *pp = p->next;
2996 break;
2997 }
2998 if (q == NULL)
2999 pp = &p->next;
3000 }
3001 *pp = edir->dyn_relocs;
3002 }
3003
3004 edir->dyn_relocs = eind->dyn_relocs;
3005 eind->dyn_relocs = NULL;
3006 }
3007
3008 edir->tls_mask |= eind->tls_mask;
3009 edir->has_sda_refs |= eind->has_sda_refs;
3010
3011 /* If called to transfer flags for a weakdef during processing
3012 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3013 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3014 if (!(ELIMINATE_COPY_RELOCS
3015 && eind->elf.root.type != bfd_link_hash_indirect
3016 && edir->elf.dynamic_adjusted))
3017 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3018
3019 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3020 edir->elf.ref_regular |= eind->elf.ref_regular;
3021 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3022 edir->elf.needs_plt |= eind->elf.needs_plt;
3023 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3024
3025 /* If we were called to copy over info for a weak sym, that's all. */
3026 if (eind->elf.root.type != bfd_link_hash_indirect)
3027 return;
3028
3029 /* Copy over the GOT refcount entries that we may have already seen to
3030 the symbol which just became indirect. */
3031 edir->elf.got.refcount += eind->elf.got.refcount;
3032 eind->elf.got.refcount = 0;
3033
3034 /* And plt entries. */
3035 if (eind->elf.plt.plist != NULL)
3036 {
3037 if (edir->elf.plt.plist != NULL)
3038 {
3039 struct plt_entry **entp;
3040 struct plt_entry *ent;
3041
3042 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3043 {
3044 struct plt_entry *dent;
3045
3046 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3047 if (dent->sec == ent->sec && dent->addend == ent->addend)
3048 {
3049 dent->plt.refcount += ent->plt.refcount;
3050 *entp = ent->next;
3051 break;
3052 }
3053 if (dent == NULL)
3054 entp = &ent->next;
3055 }
3056 *entp = edir->elf.plt.plist;
3057 }
3058
3059 edir->elf.plt.plist = eind->elf.plt.plist;
3060 eind->elf.plt.plist = NULL;
3061 }
3062
3063 if (eind->elf.dynindx != -1)
3064 {
3065 if (edir->elf.dynindx != -1)
3066 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3067 edir->elf.dynstr_index);
3068 edir->elf.dynindx = eind->elf.dynindx;
3069 edir->elf.dynstr_index = eind->elf.dynstr_index;
3070 eind->elf.dynindx = -1;
3071 eind->elf.dynstr_index = 0;
3072 }
3073 }
3074
3075 /* Hook called by the linker routine which adds symbols from an object
3076 file. We use it to put .comm items in .sbss, and not .bss. */
3077
3078 static bfd_boolean
3079 ppc_elf_add_symbol_hook (bfd *abfd,
3080 struct bfd_link_info *info,
3081 Elf_Internal_Sym *sym,
3082 const char **namep ATTRIBUTE_UNUSED,
3083 flagword *flagsp ATTRIBUTE_UNUSED,
3084 asection **secp,
3085 bfd_vma *valp)
3086 {
3087 if (sym->st_shndx == SHN_COMMON
3088 && !info->relocatable
3089 && is_ppc_elf (info->output_bfd)
3090 && sym->st_size <= elf_gp_size (abfd))
3091 {
3092 /* Common symbols less than or equal to -G nn bytes are automatically
3093 put into .sbss. */
3094 struct ppc_elf_link_hash_table *htab;
3095
3096 htab = ppc_elf_hash_table (info);
3097 if (htab->sbss == NULL)
3098 {
3099 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3100
3101 if (!htab->elf.dynobj)
3102 htab->elf.dynobj = abfd;
3103
3104 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3105 ".sbss",
3106 flags);
3107 if (htab->sbss == NULL)
3108 return FALSE;
3109 }
3110
3111 *secp = htab->sbss;
3112 *valp = sym->st_size;
3113 }
3114
3115 if ((abfd->flags & DYNAMIC) == 0
3116 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3117 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3118 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3119
3120 return TRUE;
3121 }
3122 \f
3123 static bfd_boolean
3124 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3125 {
3126 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3127
3128 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3129 TRUE, FALSE, TRUE);
3130 if (lsect->sym == NULL)
3131 return FALSE;
3132 if (lsect->sym->root.type == bfd_link_hash_new)
3133 lsect->sym->non_elf = 0;
3134 lsect->sym->ref_regular = 1;
3135 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3136 return TRUE;
3137 }
3138
3139 /* Create a special linker section. */
3140
3141 static bfd_boolean
3142 ppc_elf_create_linker_section (bfd *abfd,
3143 struct bfd_link_info *info,
3144 flagword flags,
3145 elf_linker_section_t *lsect)
3146 {
3147 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3148 asection *s;
3149
3150 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3151 | SEC_LINKER_CREATED);
3152
3153 /* Record the first bfd that needs the special sections. */
3154 if (!htab->elf.dynobj)
3155 htab->elf.dynobj = abfd;
3156
3157 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3158 lsect->name,
3159 flags);
3160 if (s == NULL
3161 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3162 return FALSE;
3163 lsect->section = s;
3164
3165 return create_sdata_sym (info, lsect);
3166 }
3167
3168 /* Find a linker generated pointer with a given addend and type. */
3169
3170 static elf_linker_section_pointers_t *
3171 elf_find_pointer_linker_section
3172 (elf_linker_section_pointers_t *linker_pointers,
3173 bfd_vma addend,
3174 elf_linker_section_t *lsect)
3175 {
3176 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3177 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3178 return linker_pointers;
3179
3180 return NULL;
3181 }
3182
3183 /* Allocate a pointer to live in a linker created section. */
3184
3185 static bfd_boolean
3186 elf_create_pointer_linker_section (bfd *abfd,
3187 elf_linker_section_t *lsect,
3188 struct elf_link_hash_entry *h,
3189 const Elf_Internal_Rela *rel)
3190 {
3191 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3192 elf_linker_section_pointers_t *linker_section_ptr;
3193 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3194 bfd_size_type amt;
3195
3196 BFD_ASSERT (lsect != NULL);
3197
3198 /* Is this a global symbol? */
3199 if (h != NULL)
3200 {
3201 struct ppc_elf_link_hash_entry *eh;
3202
3203 /* Has this symbol already been allocated? If so, our work is done. */
3204 eh = (struct ppc_elf_link_hash_entry *) h;
3205 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3206 rel->r_addend,
3207 lsect))
3208 return TRUE;
3209
3210 ptr_linker_section_ptr = &eh->linker_section_pointer;
3211 }
3212 else
3213 {
3214 BFD_ASSERT (is_ppc_elf (abfd));
3215
3216 /* Allocation of a pointer to a local symbol. */
3217 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3218
3219 /* Allocate a table to hold the local symbols if first time. */
3220 if (!ptr)
3221 {
3222 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3223
3224 amt = num_symbols;
3225 amt *= sizeof (elf_linker_section_pointers_t *);
3226 ptr = bfd_zalloc (abfd, amt);
3227
3228 if (!ptr)
3229 return FALSE;
3230
3231 elf_local_ptr_offsets (abfd) = ptr;
3232 }
3233
3234 /* Has this symbol already been allocated? If so, our work is done. */
3235 if (elf_find_pointer_linker_section (ptr[r_symndx],
3236 rel->r_addend,
3237 lsect))
3238 return TRUE;
3239
3240 ptr_linker_section_ptr = &ptr[r_symndx];
3241 }
3242
3243 /* Allocate space for a pointer in the linker section, and allocate
3244 a new pointer record from internal memory. */
3245 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3246 amt = sizeof (elf_linker_section_pointers_t);
3247 linker_section_ptr = bfd_alloc (abfd, amt);
3248
3249 if (!linker_section_ptr)
3250 return FALSE;
3251
3252 linker_section_ptr->next = *ptr_linker_section_ptr;
3253 linker_section_ptr->addend = rel->r_addend;
3254 linker_section_ptr->lsect = lsect;
3255 *ptr_linker_section_ptr = linker_section_ptr;
3256
3257 linker_section_ptr->offset = lsect->section->size;
3258 lsect->section->size += 4;
3259
3260 #ifdef DEBUG
3261 fprintf (stderr,
3262 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3263 lsect->name, (long) linker_section_ptr->offset,
3264 (long) lsect->section->size);
3265 #endif
3266
3267 return TRUE;
3268 }
3269
3270 static struct plt_entry **
3271 update_local_sym_info (bfd *abfd,
3272 Elf_Internal_Shdr *symtab_hdr,
3273 unsigned long r_symndx,
3274 int tls_type)
3275 {
3276 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3277 struct plt_entry **local_plt;
3278 char *local_got_tls_masks;
3279
3280 if (local_got_refcounts == NULL)
3281 {
3282 bfd_size_type size = symtab_hdr->sh_info;
3283
3284 size *= (sizeof (*local_got_refcounts)
3285 + sizeof (*local_plt)
3286 + sizeof (*local_got_tls_masks));
3287 local_got_refcounts = bfd_zalloc (abfd, size);
3288 if (local_got_refcounts == NULL)
3289 return NULL;
3290 elf_local_got_refcounts (abfd) = local_got_refcounts;
3291 }
3292
3293 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3294 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3295 local_got_tls_masks[r_symndx] |= tls_type;
3296 if (tls_type != PLT_IFUNC)
3297 local_got_refcounts[r_symndx] += 1;
3298 return local_plt + r_symndx;
3299 }
3300
3301 static bfd_boolean
3302 update_plt_info (bfd *abfd, struct plt_entry **plist,
3303 asection *sec, bfd_vma addend)
3304 {
3305 struct plt_entry *ent;
3306
3307 if (addend < 32768)
3308 sec = NULL;
3309 for (ent = *plist; ent != NULL; ent = ent->next)
3310 if (ent->sec == sec && ent->addend == addend)
3311 break;
3312 if (ent == NULL)
3313 {
3314 bfd_size_type amt = sizeof (*ent);
3315 ent = bfd_alloc (abfd, amt);
3316 if (ent == NULL)
3317 return FALSE;
3318 ent->next = *plist;
3319 ent->sec = sec;
3320 ent->addend = addend;
3321 ent->plt.refcount = 0;
3322 *plist = ent;
3323 }
3324 ent->plt.refcount += 1;
3325 return TRUE;
3326 }
3327
3328 static struct plt_entry *
3329 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3330 {
3331 struct plt_entry *ent;
3332
3333 if (addend < 32768)
3334 sec = NULL;
3335 for (ent = *plist; ent != NULL; ent = ent->next)
3336 if (ent->sec == sec && ent->addend == addend)
3337 break;
3338 return ent;
3339 }
3340
3341 static bfd_boolean
3342 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3343 {
3344 return (r_type == R_PPC_PLTREL24
3345 || r_type == R_PPC_LOCAL24PC
3346 || r_type == R_PPC_REL24
3347 || r_type == R_PPC_REL14
3348 || r_type == R_PPC_REL14_BRTAKEN
3349 || r_type == R_PPC_REL14_BRNTAKEN
3350 || r_type == R_PPC_ADDR24
3351 || r_type == R_PPC_ADDR14
3352 || r_type == R_PPC_ADDR14_BRTAKEN
3353 || r_type == R_PPC_ADDR14_BRNTAKEN);
3354 }
3355
3356 static void
3357 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3358 {
3359 (*_bfd_error_handler)
3360 (_("%B: relocation %s cannot be used when making a shared object"),
3361 abfd,
3362 ppc_elf_howto_table[r_type]->name);
3363 bfd_set_error (bfd_error_bad_value);
3364 }
3365
3366 /* Look through the relocs for a section during the first phase, and
3367 allocate space in the global offset table or procedure linkage
3368 table. */
3369
3370 static bfd_boolean
3371 ppc_elf_check_relocs (bfd *abfd,
3372 struct bfd_link_info *info,
3373 asection *sec,
3374 const Elf_Internal_Rela *relocs)
3375 {
3376 struct ppc_elf_link_hash_table *htab;
3377 Elf_Internal_Shdr *symtab_hdr;
3378 struct elf_link_hash_entry **sym_hashes;
3379 const Elf_Internal_Rela *rel;
3380 const Elf_Internal_Rela *rel_end;
3381 asection *got2, *sreloc;
3382 struct elf_link_hash_entry *tga;
3383
3384 if (info->relocatable)
3385 return TRUE;
3386
3387 /* Don't do anything special with non-loaded, non-alloced sections.
3388 In particular, any relocs in such sections should not affect GOT
3389 and PLT reference counting (ie. we don't allow them to create GOT
3390 or PLT entries), there's no possibility or desire to optimize TLS
3391 relocs, and there's not much point in propagating relocs to shared
3392 libs that the dynamic linker won't relocate. */
3393 if ((sec->flags & SEC_ALLOC) == 0)
3394 return TRUE;
3395
3396 #ifdef DEBUG
3397 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3398 sec, abfd);
3399 #endif
3400
3401 BFD_ASSERT (is_ppc_elf (abfd));
3402
3403 /* Initialize howto table if not already done. */
3404 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3405 ppc_elf_howto_init ();
3406
3407 htab = ppc_elf_hash_table (info);
3408 if (htab->glink == NULL)
3409 {
3410 if (htab->elf.dynobj == NULL)
3411 htab->elf.dynobj = abfd;
3412 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3413 return FALSE;
3414 }
3415 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3416 FALSE, FALSE, TRUE);
3417 symtab_hdr = &elf_symtab_hdr (abfd);
3418 sym_hashes = elf_sym_hashes (abfd);
3419 got2 = bfd_get_section_by_name (abfd, ".got2");
3420 sreloc = NULL;
3421
3422 rel_end = relocs + sec->reloc_count;
3423 for (rel = relocs; rel < rel_end; rel++)
3424 {
3425 unsigned long r_symndx;
3426 enum elf_ppc_reloc_type r_type;
3427 struct elf_link_hash_entry *h;
3428 int tls_type;
3429
3430 r_symndx = ELF32_R_SYM (rel->r_info);
3431 if (r_symndx < symtab_hdr->sh_info)
3432 h = NULL;
3433 else
3434 {
3435 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3436 while (h->root.type == bfd_link_hash_indirect
3437 || h->root.type == bfd_link_hash_warning)
3438 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3439 }
3440
3441 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3442 This shows up in particular in an R_PPC_ADDR32 in the eabi
3443 startup code. */
3444 if (h != NULL
3445 && htab->got == NULL
3446 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3447 {
3448 if (htab->elf.dynobj == NULL)
3449 htab->elf.dynobj = abfd;
3450 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3451 return FALSE;
3452 BFD_ASSERT (h == htab->elf.hgot);
3453 }
3454
3455 tls_type = 0;
3456 r_type = ELF32_R_TYPE (rel->r_info);
3457 if (h == NULL && !htab->is_vxworks)
3458 {
3459 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3460 abfd, r_symndx);
3461 if (isym == NULL)
3462 return FALSE;
3463
3464 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3465 && (!info->shared
3466 || is_branch_reloc (r_type)))
3467 {
3468 struct plt_entry **ifunc;
3469 bfd_vma addend;
3470
3471 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3472 PLT_IFUNC);
3473 if (ifunc == NULL)
3474 return FALSE;
3475
3476 /* STT_GNU_IFUNC symbols must have a PLT entry;
3477 In a non-pie executable even when there are
3478 no plt calls. */
3479 addend = 0;
3480 if (r_type == R_PPC_PLTREL24)
3481 {
3482 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3483 if (info->shared)
3484 addend = rel->r_addend;
3485 }
3486 if (!update_plt_info (abfd, ifunc, got2, addend))
3487 return FALSE;
3488 }
3489 }
3490
3491 if (!htab->is_vxworks
3492 && is_branch_reloc (r_type)
3493 && h != NULL
3494 && h == tga)
3495 {
3496 if (rel != relocs
3497 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3498 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3499 /* We have a new-style __tls_get_addr call with a marker
3500 reloc. */
3501 ;
3502 else
3503 /* Mark this section as having an old-style call. */
3504 sec->has_tls_get_addr_call = 1;
3505 }
3506
3507 switch (r_type)
3508 {
3509 case R_PPC_TLSGD:
3510 case R_PPC_TLSLD:
3511 /* These special tls relocs tie a call to __tls_get_addr with
3512 its parameter symbol. */
3513 break;
3514
3515 case R_PPC_GOT_TLSLD16:
3516 case R_PPC_GOT_TLSLD16_LO:
3517 case R_PPC_GOT_TLSLD16_HI:
3518 case R_PPC_GOT_TLSLD16_HA:
3519 tls_type = TLS_TLS | TLS_LD;
3520 goto dogottls;
3521
3522 case R_PPC_GOT_TLSGD16:
3523 case R_PPC_GOT_TLSGD16_LO:
3524 case R_PPC_GOT_TLSGD16_HI:
3525 case R_PPC_GOT_TLSGD16_HA:
3526 tls_type = TLS_TLS | TLS_GD;
3527 goto dogottls;
3528
3529 case R_PPC_GOT_TPREL16:
3530 case R_PPC_GOT_TPREL16_LO:
3531 case R_PPC_GOT_TPREL16_HI:
3532 case R_PPC_GOT_TPREL16_HA:
3533 if (!info->executable)
3534 info->flags |= DF_STATIC_TLS;
3535 tls_type = TLS_TLS | TLS_TPREL;
3536 goto dogottls;
3537
3538 case R_PPC_GOT_DTPREL16:
3539 case R_PPC_GOT_DTPREL16_LO:
3540 case R_PPC_GOT_DTPREL16_HI:
3541 case R_PPC_GOT_DTPREL16_HA:
3542 tls_type = TLS_TLS | TLS_DTPREL;
3543 dogottls:
3544 sec->has_tls_reloc = 1;
3545 /* Fall thru */
3546
3547 /* GOT16 relocations */
3548 case R_PPC_GOT16:
3549 case R_PPC_GOT16_LO:
3550 case R_PPC_GOT16_HI:
3551 case R_PPC_GOT16_HA:
3552 /* This symbol requires a global offset table entry. */
3553 if (htab->got == NULL)
3554 {
3555 if (htab->elf.dynobj == NULL)
3556 htab->elf.dynobj = abfd;
3557 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3558 return FALSE;
3559 }
3560 if (h != NULL)
3561 {
3562 h->got.refcount += 1;
3563 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3564 }
3565 else
3566 /* This is a global offset table entry for a local symbol. */
3567 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3568 return FALSE;
3569
3570 /* We may also need a plt entry if the symbol turns out to be
3571 an ifunc. */
3572 if (h != NULL && !info->shared)
3573 {
3574 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3575 return FALSE;
3576 }
3577 break;
3578
3579 /* Indirect .sdata relocation. */
3580 case R_PPC_EMB_SDAI16:
3581 if (info->shared)
3582 {
3583 bad_shared_reloc (abfd, r_type);
3584 return FALSE;
3585 }
3586 if (htab->sdata[0].section == NULL
3587 && !ppc_elf_create_linker_section (abfd, info, 0,
3588 &htab->sdata[0]))
3589 return FALSE;
3590 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3591 h, rel))
3592 return FALSE;
3593 if (h != NULL)
3594 {
3595 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3596 h->non_got_ref = TRUE;
3597 }
3598 break;
3599
3600 /* Indirect .sdata2 relocation. */
3601 case R_PPC_EMB_SDA2I16:
3602 if (info->shared)
3603 {
3604 bad_shared_reloc (abfd, r_type);
3605 return FALSE;
3606 }
3607 if (htab->sdata[1].section == NULL
3608 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3609 &htab->sdata[1]))
3610 return FALSE;
3611 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3612 h, rel))
3613 return FALSE;
3614 if (h != NULL)
3615 {
3616 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3617 h->non_got_ref = TRUE;
3618 }
3619 break;
3620
3621 case R_PPC_SDAREL16:
3622 if (htab->sdata[0].sym == NULL
3623 && !create_sdata_sym (info, &htab->sdata[0]))
3624 return FALSE;
3625 if (h != NULL)
3626 {
3627 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3628 h->non_got_ref = TRUE;
3629 }
3630 break;
3631
3632 case R_PPC_EMB_SDA2REL:
3633 if (info->shared)
3634 {
3635 bad_shared_reloc (abfd, r_type);
3636 return FALSE;
3637 }
3638 if (htab->sdata[1].sym == NULL
3639 && !create_sdata_sym (info, &htab->sdata[1]))
3640 return FALSE;
3641 if (h != NULL)
3642 {
3643 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3644 h->non_got_ref = TRUE;
3645 }
3646 break;
3647
3648 case R_PPC_EMB_SDA21:
3649 case R_PPC_EMB_RELSDA:
3650 if (info->shared)
3651 {
3652 bad_shared_reloc (abfd, r_type);
3653 return FALSE;
3654 }
3655 if (htab->sdata[0].sym == NULL
3656 && !create_sdata_sym (info, &htab->sdata[0]))
3657 return FALSE;
3658 if (htab->sdata[1].sym == NULL
3659 && !create_sdata_sym (info, &htab->sdata[1]))
3660 return FALSE;
3661 if (h != NULL)
3662 {
3663 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3664 h->non_got_ref = TRUE;
3665 }
3666 break;
3667
3668 case R_PPC_EMB_NADDR32:
3669 case R_PPC_EMB_NADDR16:
3670 case R_PPC_EMB_NADDR16_LO:
3671 case R_PPC_EMB_NADDR16_HI:
3672 case R_PPC_EMB_NADDR16_HA:
3673 if (info->shared)
3674 {
3675 bad_shared_reloc (abfd, r_type);
3676 return FALSE;
3677 }
3678 if (h != NULL)
3679 h->non_got_ref = TRUE;
3680 break;
3681
3682 case R_PPC_PLTREL24:
3683 if (h == NULL)
3684 break;
3685 /* Fall through */
3686 case R_PPC_PLT32:
3687 case R_PPC_PLTREL32:
3688 case R_PPC_PLT16_LO:
3689 case R_PPC_PLT16_HI:
3690 case R_PPC_PLT16_HA:
3691 #ifdef DEBUG
3692 fprintf (stderr, "Reloc requires a PLT entry\n");
3693 #endif
3694 /* This symbol requires a procedure linkage table entry. We
3695 actually build the entry in finish_dynamic_symbol,
3696 because this might be a case of linking PIC code without
3697 linking in any dynamic objects, in which case we don't
3698 need to generate a procedure linkage table after all. */
3699
3700 if (h == NULL)
3701 {
3702 /* It does not make sense to have a procedure linkage
3703 table entry for a local symbol. */
3704 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3705 "local symbol"),
3706 abfd,
3707 sec,
3708 (long) rel->r_offset,
3709 ppc_elf_howto_table[r_type]->name);
3710 bfd_set_error (bfd_error_bad_value);
3711 return FALSE;
3712 }
3713 else
3714 {
3715 bfd_vma addend = 0;
3716
3717 if (r_type == R_PPC_PLTREL24)
3718 {
3719 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3720 if (info->shared)
3721 addend = rel->r_addend;
3722 }
3723 h->needs_plt = 1;
3724 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
3725 return FALSE;
3726 }
3727 break;
3728
3729 /* The following relocations don't need to propagate the
3730 relocation if linking a shared object since they are
3731 section relative. */
3732 case R_PPC_SECTOFF:
3733 case R_PPC_SECTOFF_LO:
3734 case R_PPC_SECTOFF_HI:
3735 case R_PPC_SECTOFF_HA:
3736 case R_PPC_DTPREL16:
3737 case R_PPC_DTPREL16_LO:
3738 case R_PPC_DTPREL16_HI:
3739 case R_PPC_DTPREL16_HA:
3740 case R_PPC_TOC16:
3741 break;
3742
3743 case R_PPC_REL16:
3744 case R_PPC_REL16_LO:
3745 case R_PPC_REL16_HI:
3746 case R_PPC_REL16_HA:
3747 ppc_elf_tdata (abfd)->has_rel16 = 1;
3748 break;
3749
3750 /* These are just markers. */
3751 case R_PPC_TLS:
3752 case R_PPC_EMB_MRKREF:
3753 case R_PPC_NONE:
3754 case R_PPC_max:
3755 case R_PPC_RELAX:
3756 case R_PPC_RELAX_PLT:
3757 case R_PPC_RELAX_PLTREL24:
3758 break;
3759
3760 /* These should only appear in dynamic objects. */
3761 case R_PPC_COPY:
3762 case R_PPC_GLOB_DAT:
3763 case R_PPC_JMP_SLOT:
3764 case R_PPC_RELATIVE:
3765 case R_PPC_IRELATIVE:
3766 break;
3767
3768 /* These aren't handled yet. We'll report an error later. */
3769 case R_PPC_ADDR30:
3770 case R_PPC_EMB_RELSEC16:
3771 case R_PPC_EMB_RELST_LO:
3772 case R_PPC_EMB_RELST_HI:
3773 case R_PPC_EMB_RELST_HA:
3774 case R_PPC_EMB_BIT_FLD:
3775 break;
3776
3777 /* This refers only to functions defined in the shared library. */
3778 case R_PPC_LOCAL24PC:
3779 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3780 {
3781 htab->plt_type = PLT_OLD;
3782 htab->old_bfd = abfd;
3783 }
3784 break;
3785
3786 /* This relocation describes the C++ object vtable hierarchy.
3787 Reconstruct it for later use during GC. */
3788 case R_PPC_GNU_VTINHERIT:
3789 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3790 return FALSE;
3791 break;
3792
3793 /* This relocation describes which C++ vtable entries are actually
3794 used. Record for later use during GC. */
3795 case R_PPC_GNU_VTENTRY:
3796 BFD_ASSERT (h != NULL);
3797 if (h != NULL
3798 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3799 return FALSE;
3800 break;
3801
3802 /* We shouldn't really be seeing these. */
3803 case R_PPC_TPREL32:
3804 case R_PPC_TPREL16:
3805 case R_PPC_TPREL16_LO:
3806 case R_PPC_TPREL16_HI:
3807 case R_PPC_TPREL16_HA:
3808 if (!info->executable)
3809 info->flags |= DF_STATIC_TLS;
3810 goto dodyn;
3811
3812 /* Nor these. */
3813 case R_PPC_DTPMOD32:
3814 case R_PPC_DTPREL32:
3815 goto dodyn;
3816
3817 case R_PPC_REL32:
3818 if (h == NULL
3819 && got2 != NULL
3820 && (sec->flags & SEC_CODE) != 0
3821 && info->shared
3822 && htab->plt_type == PLT_UNSET)
3823 {
3824 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3825 the start of a function, which assembles to a REL32
3826 reference to .got2. If we detect one of these, then
3827 force the old PLT layout because the linker cannot
3828 reliably deduce the GOT pointer value needed for
3829 PLT call stubs. */
3830 asection *s;
3831 Elf_Internal_Sym *isym;
3832
3833 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3834 abfd, r_symndx);
3835 if (isym == NULL)
3836 return FALSE;
3837
3838 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3839 if (s == got2)
3840 {
3841 htab->plt_type = PLT_OLD;
3842 htab->old_bfd = abfd;
3843 }
3844 }
3845 if (h == NULL || h == htab->elf.hgot)
3846 break;
3847 /* fall through */
3848
3849 case R_PPC_ADDR32:
3850 case R_PPC_ADDR16:
3851 case R_PPC_ADDR16_LO:
3852 case R_PPC_ADDR16_HI:
3853 case R_PPC_ADDR16_HA:
3854 case R_PPC_UADDR32:
3855 case R_PPC_UADDR16:
3856 if (h != NULL && !info->shared)
3857 {
3858 /* We may need a plt entry if the symbol turns out to be
3859 a function defined in a dynamic object. */
3860 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3861 return FALSE;
3862
3863 /* We may need a copy reloc too. */
3864 h->non_got_ref = 1;
3865 h->pointer_equality_needed = 1;
3866 }
3867 goto dodyn;
3868
3869 case R_PPC_REL24:
3870 case R_PPC_REL14:
3871 case R_PPC_REL14_BRTAKEN:
3872 case R_PPC_REL14_BRNTAKEN:
3873 if (h == NULL)
3874 break;
3875 if (h == htab->elf.hgot)
3876 {
3877 if (htab->plt_type == PLT_UNSET)
3878 {
3879 htab->plt_type = PLT_OLD;
3880 htab->old_bfd = abfd;
3881 }
3882 break;
3883 }
3884 /* fall through */
3885
3886 case R_PPC_ADDR24:
3887 case R_PPC_ADDR14:
3888 case R_PPC_ADDR14_BRTAKEN:
3889 case R_PPC_ADDR14_BRNTAKEN:
3890 if (h != NULL && !info->shared)
3891 {
3892 /* We may need a plt entry if the symbol turns out to be
3893 a function defined in a dynamic object. */
3894 h->needs_plt = 1;
3895 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3896 return FALSE;
3897 break;
3898 }
3899
3900 dodyn:
3901 /* If we are creating a shared library, and this is a reloc
3902 against a global symbol, or a non PC relative reloc
3903 against a local symbol, then we need to copy the reloc
3904 into the shared library. However, if we are linking with
3905 -Bsymbolic, we do not need to copy a reloc against a
3906 global symbol which is defined in an object we are
3907 including in the link (i.e., DEF_REGULAR is set). At
3908 this point we have not seen all the input files, so it is
3909 possible that DEF_REGULAR is not set now but will be set
3910 later (it is never cleared). In case of a weak definition,
3911 DEF_REGULAR may be cleared later by a strong definition in
3912 a shared library. We account for that possibility below by
3913 storing information in the dyn_relocs field of the hash
3914 table entry. A similar situation occurs when creating
3915 shared libraries and symbol visibility changes render the
3916 symbol local.
3917
3918 If on the other hand, we are creating an executable, we
3919 may need to keep relocations for symbols satisfied by a
3920 dynamic library if we manage to avoid copy relocs for the
3921 symbol. */
3922 if ((info->shared
3923 && (must_be_dyn_reloc (info, r_type)
3924 || (h != NULL
3925 && (! info->symbolic
3926 || h->root.type == bfd_link_hash_defweak
3927 || !h->def_regular))))
3928 || (ELIMINATE_COPY_RELOCS
3929 && !info->shared
3930 && h != NULL
3931 && (h->root.type == bfd_link_hash_defweak
3932 || !h->def_regular)))
3933 {
3934 struct ppc_elf_dyn_relocs *p;
3935 struct ppc_elf_dyn_relocs **rel_head;
3936
3937 #ifdef DEBUG
3938 fprintf (stderr,
3939 "ppc_elf_check_relocs needs to "
3940 "create relocation for %s\n",
3941 (h && h->root.root.string
3942 ? h->root.root.string : "<unknown>"));
3943 #endif
3944 if (sreloc == NULL)
3945 {
3946 if (htab->elf.dynobj == NULL)
3947 htab->elf.dynobj = abfd;
3948
3949 sreloc = _bfd_elf_make_dynamic_reloc_section
3950 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3951
3952 if (sreloc == NULL)
3953 return FALSE;
3954 }
3955
3956 /* If this is a global symbol, we count the number of
3957 relocations we need for this symbol. */
3958 if (h != NULL)
3959 {
3960 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
3961 }
3962 else
3963 {
3964 /* Track dynamic relocs needed for local syms too.
3965 We really need local syms available to do this
3966 easily. Oh well. */
3967 asection *s;
3968 void *vpp;
3969 Elf_Internal_Sym *isym;
3970
3971 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3972 abfd, r_symndx);
3973 if (isym == NULL)
3974 return FALSE;
3975
3976 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3977 if (s == NULL)
3978 s = sec;
3979
3980 vpp = &elf_section_data (s)->local_dynrel;
3981 rel_head = (struct ppc_elf_dyn_relocs **) vpp;
3982 }
3983
3984 p = *rel_head;
3985 if (p == NULL || p->sec != sec)
3986 {
3987 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3988 if (p == NULL)
3989 return FALSE;
3990 p->next = *rel_head;
3991 *rel_head = p;
3992 p->sec = sec;
3993 p->count = 0;
3994 p->pc_count = 0;
3995 }
3996
3997 p->count += 1;
3998 if (!must_be_dyn_reloc (info, r_type))
3999 p->pc_count += 1;
4000 }
4001
4002 break;
4003 }
4004 }
4005
4006 return TRUE;
4007 }
4008 \f
4009
4010 /* Merge object attributes from IBFD into OBFD. Raise an error if
4011 there are conflicting attributes. */
4012 static bfd_boolean
4013 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4014 {
4015 obj_attribute *in_attr, *in_attrs;
4016 obj_attribute *out_attr, *out_attrs;
4017
4018 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4019 {
4020 /* This is the first object. Copy the attributes. */
4021 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4022
4023 /* Use the Tag_null value to indicate the attributes have been
4024 initialized. */
4025 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4026
4027 return TRUE;
4028 }
4029
4030 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4031 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4032
4033 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4034 non-conflicting ones. */
4035 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4036 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4037 if (in_attr->i != out_attr->i)
4038 {
4039 out_attr->type = 1;
4040 if (out_attr->i == 0)
4041 out_attr->i = in_attr->i;
4042 else if (in_attr->i == 0)
4043 ;
4044 else if (out_attr->i == 1 && in_attr->i == 2)
4045 _bfd_error_handler
4046 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4047 else if (out_attr->i == 1 && in_attr->i == 3)
4048 _bfd_error_handler
4049 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4050 obfd, ibfd);
4051 else if (out_attr->i == 3 && in_attr->i == 1)
4052 _bfd_error_handler
4053 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4054 ibfd, obfd);
4055 else if (out_attr->i == 3 && in_attr->i == 2)
4056 _bfd_error_handler
4057 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4058 ibfd, obfd);
4059 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4060 _bfd_error_handler
4061 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4062 else if (in_attr->i > 3)
4063 _bfd_error_handler
4064 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4065 in_attr->i);
4066 else
4067 _bfd_error_handler
4068 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4069 out_attr->i);
4070 }
4071
4072 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4073 merge non-conflicting ones. */
4074 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4075 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4076 if (in_attr->i != out_attr->i)
4077 {
4078 const char *in_abi = NULL, *out_abi = NULL;
4079
4080 switch (in_attr->i)
4081 {
4082 case 1: in_abi = "generic"; break;
4083 case 2: in_abi = "AltiVec"; break;
4084 case 3: in_abi = "SPE"; break;
4085 }
4086
4087 switch (out_attr->i)
4088 {
4089 case 1: out_abi = "generic"; break;
4090 case 2: out_abi = "AltiVec"; break;
4091 case 3: out_abi = "SPE"; break;
4092 }
4093
4094 out_attr->type = 1;
4095 if (out_attr->i == 0)
4096 out_attr->i = in_attr->i;
4097 else if (in_attr->i == 0)
4098 ;
4099 /* For now, allow generic to transition to AltiVec or SPE
4100 without a warning. If GCC marked files with their stack
4101 alignment and used don't-care markings for files which are
4102 not affected by the vector ABI, we could warn about this
4103 case too. */
4104 else if (out_attr->i == 1)
4105 out_attr->i = in_attr->i;
4106 else if (in_attr->i == 1)
4107 ;
4108 else if (in_abi == NULL)
4109 _bfd_error_handler
4110 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4111 in_attr->i);
4112 else if (out_abi == NULL)
4113 _bfd_error_handler
4114 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4115 in_attr->i);
4116 else
4117 _bfd_error_handler
4118 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4119 ibfd, obfd, in_abi, out_abi);
4120 }
4121
4122 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4123 and merge non-conflicting ones. */
4124 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4125 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4126 if (in_attr->i != out_attr->i)
4127 {
4128 out_attr->type = 1;
4129 if (out_attr->i == 0)
4130 out_attr->i = in_attr->i;
4131 else if (in_attr->i == 0)
4132 ;
4133 else if (out_attr->i == 1 && in_attr->i == 2)
4134 _bfd_error_handler
4135 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4136 else if (out_attr->i == 2 && in_attr->i == 1)
4137 _bfd_error_handler
4138 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4139 else if (in_attr->i > 2)
4140 _bfd_error_handler
4141 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4142 in_attr->i);
4143 else
4144 _bfd_error_handler
4145 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4146 out_attr->i);
4147 }
4148
4149 /* Merge Tag_compatibility attributes and any common GNU ones. */
4150 _bfd_elf_merge_object_attributes (ibfd, obfd);
4151
4152 return TRUE;
4153 }
4154
4155 /* Merge backend specific data from an object file to the output
4156 object file when linking. */
4157
4158 static bfd_boolean
4159 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4160 {
4161 flagword old_flags;
4162 flagword new_flags;
4163 bfd_boolean error;
4164
4165 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4166 return TRUE;
4167
4168 /* Check if we have the same endianess. */
4169 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4170 return FALSE;
4171
4172 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4173 return FALSE;
4174
4175 new_flags = elf_elfheader (ibfd)->e_flags;
4176 old_flags = elf_elfheader (obfd)->e_flags;
4177 if (!elf_flags_init (obfd))
4178 {
4179 /* First call, no flags set. */
4180 elf_flags_init (obfd) = TRUE;
4181 elf_elfheader (obfd)->e_flags = new_flags;
4182 }
4183
4184 /* Compatible flags are ok. */
4185 else if (new_flags == old_flags)
4186 ;
4187
4188 /* Incompatible flags. */
4189 else
4190 {
4191 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4192 to be linked with either. */
4193 error = FALSE;
4194 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4195 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4196 {
4197 error = TRUE;
4198 (*_bfd_error_handler)
4199 (_("%B: compiled with -mrelocatable and linked with "
4200 "modules compiled normally"), ibfd);
4201 }
4202 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4203 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4204 {
4205 error = TRUE;
4206 (*_bfd_error_handler)
4207 (_("%B: compiled normally and linked with "
4208 "modules compiled with -mrelocatable"), ibfd);
4209 }
4210
4211 /* The output is -mrelocatable-lib iff both the input files are. */
4212 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4213 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4214
4215 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4216 but each input file is either -mrelocatable or -mrelocatable-lib. */
4217 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4218 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4219 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4220 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4221
4222 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4223 any module uses it. */
4224 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4225
4226 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4227 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4228
4229 /* Warn about any other mismatches. */
4230 if (new_flags != old_flags)
4231 {
4232 error = TRUE;
4233 (*_bfd_error_handler)
4234 (_("%B: uses different e_flags (0x%lx) fields "
4235 "than previous modules (0x%lx)"),
4236 ibfd, (long) new_flags, (long) old_flags);
4237 }
4238
4239 if (error)
4240 {
4241 bfd_set_error (bfd_error_bad_value);
4242 return FALSE;
4243 }
4244 }
4245
4246 return TRUE;
4247 }
4248 \f
4249 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4250 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4251 int
4252 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4253 struct bfd_link_info *info,
4254 enum ppc_elf_plt_type plt_style,
4255 int emit_stub_syms)
4256 {
4257 struct ppc_elf_link_hash_table *htab;
4258 flagword flags;
4259
4260 htab = ppc_elf_hash_table (info);
4261
4262 htab->emit_stub_syms = emit_stub_syms;
4263
4264 if (htab->plt_type == PLT_UNSET)
4265 {
4266 if (plt_style == PLT_OLD)
4267 htab->plt_type = PLT_OLD;
4268 else
4269 {
4270 bfd *ibfd;
4271 enum ppc_elf_plt_type plt_type = plt_style;
4272
4273 /* Look through the reloc flags left by ppc_elf_check_relocs.
4274 Use the old style bss plt if a file makes plt calls
4275 without using the new relocs, and if ld isn't given
4276 --secure-plt and we never see REL16 relocs. */
4277 if (plt_type == PLT_UNSET)
4278 plt_type = PLT_OLD;
4279 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4280 if (is_ppc_elf (ibfd))
4281 {
4282 if (ppc_elf_tdata (ibfd)->has_rel16)
4283 plt_type = PLT_NEW;
4284 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4285 {
4286 plt_type = PLT_OLD;
4287 htab->old_bfd = ibfd;
4288 break;
4289 }
4290 }
4291 htab->plt_type = plt_type;
4292 }
4293 }
4294 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4295 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4296
4297 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4298
4299 if (htab->plt_type == PLT_NEW)
4300 {
4301 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4302 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4303
4304 /* The new PLT is a loaded section. */
4305 if (htab->plt != NULL
4306 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4307 return -1;
4308
4309 /* The new GOT is not executable. */
4310 if (htab->got != NULL
4311 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4312 return -1;
4313 }
4314 else
4315 {
4316 /* Stop an unused .glink section from affecting .text alignment. */
4317 if (htab->glink != NULL
4318 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4319 return -1;
4320 }
4321 return htab->plt_type == PLT_NEW;
4322 }
4323 \f
4324 /* Return the section that should be marked against GC for a given
4325 relocation. */
4326
4327 static asection *
4328 ppc_elf_gc_mark_hook (asection *sec,
4329 struct bfd_link_info *info,
4330 Elf_Internal_Rela *rel,
4331 struct elf_link_hash_entry *h,
4332 Elf_Internal_Sym *sym)
4333 {
4334 if (h != NULL)
4335 switch (ELF32_R_TYPE (rel->r_info))
4336 {
4337 case R_PPC_GNU_VTINHERIT:
4338 case R_PPC_GNU_VTENTRY:
4339 return NULL;
4340 }
4341
4342 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4343 }
4344
4345 /* Update the got, plt and dynamic reloc reference counts for the
4346 section being removed. */
4347
4348 static bfd_boolean
4349 ppc_elf_gc_sweep_hook (bfd *abfd,
4350 struct bfd_link_info *info,
4351 asection *sec,
4352 const Elf_Internal_Rela *relocs)
4353 {
4354 struct ppc_elf_link_hash_table *htab;
4355 Elf_Internal_Shdr *symtab_hdr;
4356 struct elf_link_hash_entry **sym_hashes;
4357 bfd_signed_vma *local_got_refcounts;
4358 const Elf_Internal_Rela *rel, *relend;
4359 asection *got2;
4360
4361 if (info->relocatable)
4362 return TRUE;
4363
4364 if ((sec->flags & SEC_ALLOC) == 0)
4365 return TRUE;
4366
4367 elf_section_data (sec)->local_dynrel = NULL;
4368
4369 htab = ppc_elf_hash_table (info);
4370 symtab_hdr = &elf_symtab_hdr (abfd);
4371 sym_hashes = elf_sym_hashes (abfd);
4372 local_got_refcounts = elf_local_got_refcounts (abfd);
4373 got2 = bfd_get_section_by_name (abfd, ".got2");
4374
4375 relend = relocs + sec->reloc_count;
4376 for (rel = relocs; rel < relend; rel++)
4377 {
4378 unsigned long r_symndx;
4379 enum elf_ppc_reloc_type r_type;
4380 struct elf_link_hash_entry *h = NULL;
4381
4382 r_symndx = ELF32_R_SYM (rel->r_info);
4383 if (r_symndx >= symtab_hdr->sh_info)
4384 {
4385 struct ppc_elf_dyn_relocs **pp, *p;
4386 struct ppc_elf_link_hash_entry *eh;
4387
4388 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4389 while (h->root.type == bfd_link_hash_indirect
4390 || h->root.type == bfd_link_hash_warning)
4391 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4392 eh = (struct ppc_elf_link_hash_entry *) h;
4393
4394 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4395 if (p->sec == sec)
4396 {
4397 /* Everything must go for SEC. */
4398 *pp = p->next;
4399 break;
4400 }
4401 }
4402
4403 r_type = ELF32_R_TYPE (rel->r_info);
4404 if (!htab->is_vxworks
4405 && h == NULL
4406 && local_got_refcounts != NULL
4407 && (!info->shared
4408 || is_branch_reloc (r_type)))
4409 {
4410 struct plt_entry **local_plt = (struct plt_entry **)
4411 (local_got_refcounts + symtab_hdr->sh_info);
4412 char *local_got_tls_masks = (char *)
4413 (local_plt + symtab_hdr->sh_info);
4414 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4415 {
4416 struct plt_entry **ifunc = local_plt + r_symndx;
4417 bfd_vma addend = 0;
4418 struct plt_entry *ent;
4419
4420 if (r_type == R_PPC_PLTREL24 && info->shared)
4421 addend = rel->r_addend;
4422 ent = find_plt_ent (ifunc, got2, addend);
4423 if (ent->plt.refcount > 0)
4424 ent->plt.refcount -= 1;
4425 continue;
4426 }
4427 }
4428
4429 switch (r_type)
4430 {
4431 case R_PPC_GOT_TLSLD16:
4432 case R_PPC_GOT_TLSLD16_LO:
4433 case R_PPC_GOT_TLSLD16_HI:
4434 case R_PPC_GOT_TLSLD16_HA:
4435 case R_PPC_GOT_TLSGD16:
4436 case R_PPC_GOT_TLSGD16_LO:
4437 case R_PPC_GOT_TLSGD16_HI:
4438 case R_PPC_GOT_TLSGD16_HA:
4439 case R_PPC_GOT_TPREL16:
4440 case R_PPC_GOT_TPREL16_LO:
4441 case R_PPC_GOT_TPREL16_HI:
4442 case R_PPC_GOT_TPREL16_HA:
4443 case R_PPC_GOT_DTPREL16:
4444 case R_PPC_GOT_DTPREL16_LO:
4445 case R_PPC_GOT_DTPREL16_HI:
4446 case R_PPC_GOT_DTPREL16_HA:
4447 case R_PPC_GOT16:
4448 case R_PPC_GOT16_LO:
4449 case R_PPC_GOT16_HI:
4450 case R_PPC_GOT16_HA:
4451 if (h != NULL)
4452 {
4453 if (h->got.refcount > 0)
4454 h->got.refcount--;
4455 if (!info->shared)
4456 {
4457 struct plt_entry *ent;
4458
4459 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4460 if (ent != NULL && ent->plt.refcount > 0)
4461 ent->plt.refcount -= 1;
4462 }
4463 }
4464 else if (local_got_refcounts != NULL)
4465 {
4466 if (local_got_refcounts[r_symndx] > 0)
4467 local_got_refcounts[r_symndx]--;
4468 }
4469 break;
4470
4471 case R_PPC_REL24:
4472 case R_PPC_REL14:
4473 case R_PPC_REL14_BRTAKEN:
4474 case R_PPC_REL14_BRNTAKEN:
4475 case R_PPC_REL32:
4476 if (h == NULL || h == htab->elf.hgot)
4477 break;
4478 /* Fall thru */
4479
4480 case R_PPC_ADDR32:
4481 case R_PPC_ADDR24:
4482 case R_PPC_ADDR16:
4483 case R_PPC_ADDR16_LO:
4484 case R_PPC_ADDR16_HI:
4485 case R_PPC_ADDR16_HA:
4486 case R_PPC_ADDR14:
4487 case R_PPC_ADDR14_BRTAKEN:
4488 case R_PPC_ADDR14_BRNTAKEN:
4489 case R_PPC_UADDR32:
4490 case R_PPC_UADDR16:
4491 if (info->shared)
4492 break;
4493
4494 case R_PPC_PLT32:
4495 case R_PPC_PLTREL24:
4496 case R_PPC_PLTREL32:
4497 case R_PPC_PLT16_LO:
4498 case R_PPC_PLT16_HI:
4499 case R_PPC_PLT16_HA:
4500 if (h != NULL)
4501 {
4502 bfd_vma addend = 0;
4503 struct plt_entry *ent;
4504
4505 if (r_type == R_PPC_PLTREL24 && info->shared)
4506 addend = rel->r_addend;
4507 ent = find_plt_ent (&h->plt.plist, got2, addend);
4508 if (ent != NULL && ent->plt.refcount > 0)
4509 ent->plt.refcount -= 1;
4510 }
4511 break;
4512
4513 default:
4514 break;
4515 }
4516 }
4517 return TRUE;
4518 }
4519 \f
4520 /* Set plt output section type, htab->tls_get_addr, and call the
4521 generic ELF tls_setup function. */
4522
4523 asection *
4524 ppc_elf_tls_setup (bfd *obfd,
4525 struct bfd_link_info *info,
4526 int no_tls_get_addr_opt)
4527 {
4528 struct ppc_elf_link_hash_table *htab;
4529
4530 htab = ppc_elf_hash_table (info);
4531 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4532 FALSE, FALSE, TRUE);
4533 if (!no_tls_get_addr_opt)
4534 {
4535 struct elf_link_hash_entry *opt, *tga;
4536 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4537 FALSE, FALSE, TRUE);
4538 if (opt != NULL
4539 && (opt->root.type == bfd_link_hash_defined
4540 || opt->root.type == bfd_link_hash_defweak))
4541 {
4542 /* If glibc supports an optimized __tls_get_addr call stub,
4543 signalled by the presence of __tls_get_addr_opt, and we'll
4544 be calling __tls_get_addr via a plt call stub, then
4545 make __tls_get_addr point to __tls_get_addr_opt. */
4546 tga = htab->tls_get_addr;
4547 if (htab->elf.dynamic_sections_created
4548 && tga != NULL
4549 && (tga->type == STT_FUNC
4550 || tga->needs_plt)
4551 && !(SYMBOL_CALLS_LOCAL (info, tga)
4552 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
4553 && tga->root.type == bfd_link_hash_undefweak)))
4554 {
4555 struct plt_entry *ent;
4556 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
4557 if (ent->plt.refcount > 0)
4558 break;
4559 if (ent != NULL)
4560 {
4561 tga->root.type = bfd_link_hash_indirect;
4562 tga->root.u.i.link = &opt->root;
4563 ppc_elf_copy_indirect_symbol (info, opt, tga);
4564 if (opt->dynindx != -1)
4565 {
4566 /* Use __tls_get_addr_opt in dynamic relocations. */
4567 opt->dynindx = -1;
4568 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4569 opt->dynstr_index);
4570 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
4571 return FALSE;
4572 }
4573 htab->tls_get_addr = opt;
4574 }
4575 }
4576 }
4577 else
4578 no_tls_get_addr_opt = TRUE;
4579 }
4580 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
4581 if (htab->plt_type == PLT_NEW
4582 && htab->plt != NULL
4583 && htab->plt->output_section != NULL)
4584 {
4585 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4586 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4587 }
4588
4589 return _bfd_elf_tls_setup (obfd, info);
4590 }
4591
4592 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4593 HASH. */
4594
4595 static bfd_boolean
4596 branch_reloc_hash_match (const bfd *ibfd,
4597 const Elf_Internal_Rela *rel,
4598 const struct elf_link_hash_entry *hash)
4599 {
4600 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4601 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4602 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4603
4604 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4605 {
4606 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4607 struct elf_link_hash_entry *h;
4608
4609 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4610 while (h->root.type == bfd_link_hash_indirect
4611 || h->root.type == bfd_link_hash_warning)
4612 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4613 if (h == hash)
4614 return TRUE;
4615 }
4616 return FALSE;
4617 }
4618
4619 /* Run through all the TLS relocs looking for optimization
4620 opportunities. */
4621
4622 bfd_boolean
4623 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4624 struct bfd_link_info *info)
4625 {
4626 bfd *ibfd;
4627 asection *sec;
4628 struct ppc_elf_link_hash_table *htab;
4629 int pass;
4630
4631 if (info->relocatable || !info->executable)
4632 return TRUE;
4633
4634 htab = ppc_elf_hash_table (info);
4635 if (htab == NULL)
4636 return FALSE;
4637
4638 /* Make two passes through the relocs. First time check that tls
4639 relocs involved in setting up a tls_get_addr call are indeed
4640 followed by such a call. If they are not, don't do any tls
4641 optimization. On the second pass twiddle tls_mask flags to
4642 notify relocate_section that optimization can be done, and
4643 adjust got and plt refcounts. */
4644 for (pass = 0; pass < 2; ++pass)
4645 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4646 {
4647 Elf_Internal_Sym *locsyms = NULL;
4648 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4649 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
4650
4651 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4652 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4653 {
4654 Elf_Internal_Rela *relstart, *rel, *relend;
4655 int expecting_tls_get_addr = 0;
4656
4657 /* Read the relocations. */
4658 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4659 info->keep_memory);
4660 if (relstart == NULL)
4661 return FALSE;
4662
4663 relend = relstart + sec->reloc_count;
4664 for (rel = relstart; rel < relend; rel++)
4665 {
4666 enum elf_ppc_reloc_type r_type;
4667 unsigned long r_symndx;
4668 struct elf_link_hash_entry *h = NULL;
4669 char *tls_mask;
4670 char tls_set, tls_clear;
4671 bfd_boolean is_local;
4672 bfd_signed_vma *got_count;
4673
4674 r_symndx = ELF32_R_SYM (rel->r_info);
4675 if (r_symndx >= symtab_hdr->sh_info)
4676 {
4677 struct elf_link_hash_entry **sym_hashes;
4678
4679 sym_hashes = elf_sym_hashes (ibfd);
4680 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4681 while (h->root.type == bfd_link_hash_indirect
4682 || h->root.type == bfd_link_hash_warning)
4683 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4684 }
4685
4686 is_local = FALSE;
4687 if (h == NULL
4688 || !h->def_dynamic)
4689 is_local = TRUE;
4690
4691 r_type = ELF32_R_TYPE (rel->r_info);
4692 /* If this section has old-style __tls_get_addr calls
4693 without marker relocs, then check that each
4694 __tls_get_addr call reloc is preceded by a reloc
4695 that conceivably belongs to the __tls_get_addr arg
4696 setup insn. If we don't find matching arg setup
4697 relocs, don't do any tls optimization. */
4698 if (pass == 0
4699 && sec->has_tls_get_addr_call
4700 && h != NULL
4701 && h == htab->tls_get_addr
4702 && !expecting_tls_get_addr
4703 && is_branch_reloc (r_type))
4704 {
4705 info->callbacks->minfo ("%C __tls_get_addr lost arg, "
4706 "TLS optimization disabled\n",
4707 ibfd, sec, rel->r_offset);
4708 if (elf_section_data (sec)->relocs != relstart)
4709 free (relstart);
4710 return TRUE;
4711 }
4712
4713 expecting_tls_get_addr = 0;
4714 switch (r_type)
4715 {
4716 case R_PPC_GOT_TLSLD16:
4717 case R_PPC_GOT_TLSLD16_LO:
4718 expecting_tls_get_addr = 1;
4719 /* Fall thru */
4720
4721 case R_PPC_GOT_TLSLD16_HI:
4722 case R_PPC_GOT_TLSLD16_HA:
4723 /* These relocs should never be against a symbol
4724 defined in a shared lib. Leave them alone if
4725 that turns out to be the case. */
4726 if (!is_local)
4727 continue;
4728
4729 /* LD -> LE */
4730 tls_set = 0;
4731 tls_clear = TLS_LD;
4732 break;
4733
4734 case R_PPC_GOT_TLSGD16:
4735 case R_PPC_GOT_TLSGD16_LO:
4736 expecting_tls_get_addr = 1;
4737 /* Fall thru */
4738
4739 case R_PPC_GOT_TLSGD16_HI:
4740 case R_PPC_GOT_TLSGD16_HA:
4741 if (is_local)
4742 /* GD -> LE */
4743 tls_set = 0;
4744 else
4745 /* GD -> IE */
4746 tls_set = TLS_TLS | TLS_TPRELGD;
4747 tls_clear = TLS_GD;
4748 break;
4749
4750 case R_PPC_GOT_TPREL16:
4751 case R_PPC_GOT_TPREL16_LO:
4752 case R_PPC_GOT_TPREL16_HI:
4753 case R_PPC_GOT_TPREL16_HA:
4754 if (is_local)
4755 {
4756 /* IE -> LE */
4757 tls_set = 0;
4758 tls_clear = TLS_TPREL;
4759 break;
4760 }
4761 else
4762 continue;
4763
4764 case R_PPC_TLSGD:
4765 case R_PPC_TLSLD:
4766 expecting_tls_get_addr = 2;
4767 tls_set = 0;
4768 tls_clear = 0;
4769 break;
4770
4771 default:
4772 continue;
4773 }
4774
4775 if (pass == 0)
4776 {
4777 if (!expecting_tls_get_addr
4778 || (expecting_tls_get_addr == 1
4779 && !sec->has_tls_get_addr_call))
4780 continue;
4781
4782 if (rel + 1 < relend
4783 && branch_reloc_hash_match (ibfd, rel + 1,
4784 htab->tls_get_addr))
4785 continue;
4786
4787 /* Uh oh, we didn't find the expected call. We
4788 could just mark this symbol to exclude it
4789 from tls optimization but it's safer to skip
4790 the entire optimization. */
4791 info->callbacks->minfo (_("%C arg lost __tls_get_addr, "
4792 "TLS optimization disabled\n"),
4793 ibfd, sec, rel->r_offset);
4794 if (elf_section_data (sec)->relocs != relstart)
4795 free (relstart);
4796 return TRUE;
4797 }
4798
4799 if (expecting_tls_get_addr)
4800 {
4801 struct plt_entry *ent;
4802 bfd_vma addend = 0;
4803
4804 if (info->shared
4805 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
4806 addend = rel[1].r_addend;
4807 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4808 got2, addend);
4809 if (ent != NULL && ent->plt.refcount > 0)
4810 ent->plt.refcount -= 1;
4811
4812 if (expecting_tls_get_addr == 2)
4813 continue;
4814 }
4815
4816 if (h != NULL)
4817 {
4818 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4819 got_count = &h->got.refcount;
4820 }
4821 else
4822 {
4823 bfd_signed_vma *lgot_refs;
4824 struct plt_entry **local_plt;
4825 char *lgot_masks;
4826
4827 if (locsyms == NULL)
4828 {
4829 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4830 if (locsyms == NULL)
4831 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4832 symtab_hdr->sh_info,
4833 0, NULL, NULL, NULL);
4834 if (locsyms == NULL)
4835 {
4836 if (elf_section_data (sec)->relocs != relstart)
4837 free (relstart);
4838 return FALSE;
4839 }
4840 }
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 bfd_boolean maybe_pasted;
6003
6004 *again = FALSE;
6005
6006 /* Nothing to do if there are no relocations, and no need to do
6007 anything with non-alloc or non-code sections. */
6008 if ((isec->flags & SEC_ALLOC) == 0
6009 || (isec->flags & SEC_CODE) == 0
6010 || (isec->flags & SEC_RELOC) == 0
6011 || isec->reloc_count == 0)
6012 return TRUE;
6013
6014 /* We cannot represent the required PIC relocs in the output, so don't
6015 do anything. The linker doesn't support mixing -shared and -r
6016 anyway. */
6017 if (link_info->relocatable && link_info->shared)
6018 return TRUE;
6019
6020 trampoff = (isec->size + 3) & (bfd_vma) -4;
6021 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6022 || strcmp (isec->output_section->name, ".fini") == 0);
6023 /* Space for a branch around any trampolines. */
6024 if (maybe_pasted)
6025 trampoff += 4;
6026
6027 symtab_hdr = &elf_symtab_hdr (abfd);
6028
6029 /* Get a copy of the native relocations. */
6030 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6031 link_info->keep_memory);
6032 if (internal_relocs == NULL)
6033 goto error_return;
6034
6035 htab = ppc_elf_hash_table (link_info);
6036 got2 = bfd_get_section_by_name (abfd, ".got2");
6037
6038 irelend = internal_relocs + isec->reloc_count;
6039 for (irel = internal_relocs; irel < irelend; irel++)
6040 {
6041 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6042 bfd_vma toff, roff;
6043 asection *tsec;
6044 struct one_fixup *f;
6045 size_t insn_offset = 0;
6046 bfd_vma max_branch_offset, val;
6047 bfd_byte *hit_addr;
6048 unsigned long t0;
6049 struct elf_link_hash_entry *h;
6050 struct plt_entry **plist;
6051 unsigned char sym_type;
6052
6053 switch (r_type)
6054 {
6055 case R_PPC_REL24:
6056 case R_PPC_LOCAL24PC:
6057 case R_PPC_PLTREL24:
6058 max_branch_offset = 1 << 25;
6059 break;
6060
6061 case R_PPC_REL14:
6062 case R_PPC_REL14_BRTAKEN:
6063 case R_PPC_REL14_BRNTAKEN:
6064 max_branch_offset = 1 << 15;
6065 break;
6066
6067 default:
6068 continue;
6069 }
6070
6071 /* Get the value of the symbol referred to by the reloc. */
6072 h = NULL;
6073 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6074 {
6075 /* A local symbol. */
6076 Elf_Internal_Sym *isym;
6077
6078 /* Read this BFD's local symbols. */
6079 if (isymbuf == NULL)
6080 {
6081 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6082 if (isymbuf == NULL)
6083 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6084 symtab_hdr->sh_info, 0,
6085 NULL, NULL, NULL);
6086 if (isymbuf == 0)
6087 goto error_return;
6088 }
6089 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6090 if (isym->st_shndx == SHN_UNDEF)
6091 tsec = bfd_und_section_ptr;
6092 else if (isym->st_shndx == SHN_ABS)
6093 tsec = bfd_abs_section_ptr;
6094 else if (isym->st_shndx == SHN_COMMON)
6095 tsec = bfd_com_section_ptr;
6096 else
6097 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6098
6099 toff = isym->st_value;
6100 sym_type = ELF_ST_TYPE (isym->st_info);
6101 }
6102 else
6103 {
6104 /* Global symbol handling. */
6105 unsigned long indx;
6106
6107 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6108 h = elf_sym_hashes (abfd)[indx];
6109
6110 while (h->root.type == bfd_link_hash_indirect
6111 || h->root.type == bfd_link_hash_warning)
6112 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6113
6114 if (h->root.type == bfd_link_hash_defined
6115 || h->root.type == bfd_link_hash_defweak)
6116 {
6117 tsec = h->root.u.def.section;
6118 toff = h->root.u.def.value;
6119 }
6120 else if (h->root.type == bfd_link_hash_undefined
6121 || h->root.type == bfd_link_hash_undefweak)
6122 {
6123 tsec = bfd_und_section_ptr;
6124 toff = link_info->relocatable ? indx : 0;
6125 }
6126 else
6127 continue;
6128
6129 sym_type = h->type;
6130 }
6131
6132 /* The condition here under which we call find_plt_ent must
6133 match that in relocate_section. If we call find_plt_ent here
6134 but not in relocate_section, or vice versa, then the branch
6135 destination used here may be incorrect. */
6136 plist = NULL;
6137 if (h != NULL)
6138 {
6139 /* We know is_branch_reloc (r_type) is true. */
6140 if (h->type == STT_GNU_IFUNC
6141 || r_type == R_PPC_PLTREL24)
6142 plist = &h->plt.plist;
6143 }
6144 else if (sym_type == STT_GNU_IFUNC
6145 && elf_local_got_offsets (abfd) != NULL)
6146 {
6147 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6148 struct plt_entry **local_plt = (struct plt_entry **)
6149 (local_got_offsets + symtab_hdr->sh_info);
6150 plist = local_plt + ELF32_R_SYM (irel->r_info);
6151 }
6152 if (plist != NULL)
6153 {
6154 bfd_vma addend = 0;
6155 struct plt_entry *ent;
6156
6157 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6158 addend = irel->r_addend;
6159 ent = find_plt_ent (plist, got2, addend);
6160 if (ent != NULL)
6161 {
6162 if (htab->plt_type == PLT_NEW
6163 || h == NULL
6164 || !htab->elf.dynamic_sections_created
6165 || h->dynindx == -1)
6166 {
6167 tsec = htab->glink;
6168 toff = ent->glink_offset;
6169 }
6170 else
6171 {
6172 tsec = htab->plt;
6173 toff = ent->plt.offset;
6174 }
6175 }
6176 }
6177
6178 /* If the branch and target are in the same section, you have
6179 no hope of adding stubs. We'll error out later should the
6180 branch overflow. */
6181 if (tsec == isec)
6182 continue;
6183
6184 /* There probably isn't any reason to handle symbols in
6185 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6186 attribute for a code section, and we are only looking at
6187 branches. However, implement it correctly here as a
6188 reference for other target relax_section functions. */
6189 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6190 {
6191 /* At this stage in linking, no SEC_MERGE symbol has been
6192 adjusted, so all references to such symbols need to be
6193 passed through _bfd_merged_section_offset. (Later, in
6194 relocate_section, all SEC_MERGE symbols *except* for
6195 section symbols have been adjusted.)
6196
6197 gas may reduce relocations against symbols in SEC_MERGE
6198 sections to a relocation against the section symbol when
6199 the original addend was zero. When the reloc is against
6200 a section symbol we should include the addend in the
6201 offset passed to _bfd_merged_section_offset, since the
6202 location of interest is the original symbol. On the
6203 other hand, an access to "sym+addend" where "sym" is not
6204 a section symbol should not include the addend; Such an
6205 access is presumed to be an offset from "sym"; The
6206 location of interest is just "sym". */
6207 if (sym_type == STT_SECTION)
6208 toff += irel->r_addend;
6209
6210 toff = _bfd_merged_section_offset (abfd, &tsec,
6211 elf_section_data (tsec)->sec_info,
6212 toff);
6213
6214 if (sym_type != STT_SECTION)
6215 toff += irel->r_addend;
6216 }
6217 /* PLTREL24 addends are special. */
6218 else if (r_type != R_PPC_PLTREL24)
6219 toff += irel->r_addend;
6220
6221 /* Attempted -shared link of non-pic code loses. */
6222 if (tsec->output_section == NULL)
6223 continue;
6224
6225 roff = irel->r_offset;
6226
6227 /* If the branch is in range, no need to do anything. */
6228 if (tsec != bfd_und_section_ptr
6229 && (!link_info->relocatable
6230 /* A relocatable link may have sections moved during
6231 final link, so do not presume they remain in range. */
6232 || tsec->output_section == isec->output_section))
6233 {
6234 bfd_vma symaddr, reladdr;
6235
6236 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6237 reladdr = isec->output_section->vma + isec->output_offset + roff;
6238 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6239 continue;
6240 }
6241
6242 /* Look for an existing fixup to this address. */
6243 for (f = fixups; f ; f = f->next)
6244 if (f->tsec == tsec && f->toff == toff)
6245 break;
6246
6247 if (f == NULL)
6248 {
6249 size_t size;
6250 unsigned long stub_rtype;
6251
6252 val = trampoff - roff;
6253 if (val >= max_branch_offset)
6254 /* Oh dear, we can't reach a trampoline. Don't try to add
6255 one. We'll report an error later. */
6256 continue;
6257
6258 if (link_info->shared)
6259 {
6260 size = 4 * ARRAY_SIZE (shared_stub_entry);
6261 insn_offset = 12;
6262 }
6263 else
6264 {
6265 size = 4 * ARRAY_SIZE (stub_entry);
6266 insn_offset = 0;
6267 }
6268 stub_rtype = R_PPC_RELAX;
6269 if (tsec == htab->plt
6270 || tsec == htab->glink)
6271 {
6272 stub_rtype = R_PPC_RELAX_PLT;
6273 if (r_type == R_PPC_PLTREL24)
6274 stub_rtype = R_PPC_RELAX_PLTREL24;
6275 }
6276
6277 /* Hijack the old relocation. Since we need two
6278 relocations for this use a "composite" reloc. */
6279 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6280 stub_rtype);
6281 irel->r_offset = trampoff + insn_offset;
6282 if (r_type == R_PPC_PLTREL24
6283 && stub_rtype != R_PPC_RELAX_PLTREL24)
6284 irel->r_addend = 0;
6285
6286 /* Record the fixup so we don't do it again this section. */
6287 f = bfd_malloc (sizeof (*f));
6288 f->next = fixups;
6289 f->tsec = tsec;
6290 f->toff = toff;
6291 f->trampoff = trampoff;
6292 fixups = f;
6293
6294 trampoff += size;
6295 changes++;
6296 }
6297 else
6298 {
6299 val = f->trampoff - roff;
6300 if (val >= max_branch_offset)
6301 continue;
6302
6303 /* Nop out the reloc, since we're finalizing things here. */
6304 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6305 }
6306
6307 /* Get the section contents. */
6308 if (contents == NULL)
6309 {
6310 /* Get cached copy if it exists. */
6311 if (elf_section_data (isec)->this_hdr.contents != NULL)
6312 contents = elf_section_data (isec)->this_hdr.contents;
6313 else
6314 {
6315 /* Go get them off disk. */
6316 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6317 goto error_return;
6318 }
6319 }
6320
6321 /* Fix up the existing branch to hit the trampoline. */
6322 hit_addr = contents + roff;
6323 switch (r_type)
6324 {
6325 case R_PPC_REL24:
6326 case R_PPC_LOCAL24PC:
6327 case R_PPC_PLTREL24:
6328 t0 = bfd_get_32 (abfd, hit_addr);
6329 t0 &= ~0x3fffffc;
6330 t0 |= val & 0x3fffffc;
6331 bfd_put_32 (abfd, t0, hit_addr);
6332 break;
6333
6334 case R_PPC_REL14:
6335 case R_PPC_REL14_BRTAKEN:
6336 case R_PPC_REL14_BRNTAKEN:
6337 t0 = bfd_get_32 (abfd, hit_addr);
6338 t0 &= ~0xfffc;
6339 t0 |= val & 0xfffc;
6340 bfd_put_32 (abfd, t0, hit_addr);
6341 break;
6342 }
6343 }
6344
6345 /* Write out the trampolines. */
6346 if (fixups != NULL)
6347 {
6348 const int *stub;
6349 bfd_byte *dest;
6350 int i, size;
6351
6352 do
6353 {
6354 struct one_fixup *f = fixups;
6355 fixups = fixups->next;
6356 free (f);
6357 }
6358 while (fixups);
6359
6360 contents = bfd_realloc_or_free (contents, trampoff);
6361 if (contents == NULL)
6362 goto error_return;
6363
6364 isec->size = (isec->size + 3) & (bfd_vma) -4;
6365 dest = contents + isec->size;
6366 /* Branch around the trampolines. */
6367 if (maybe_pasted)
6368 {
6369 bfd_vma val = B + trampoff - isec->size;
6370 bfd_put_32 (abfd, val, dest);
6371 dest += 4;
6372 }
6373 isec->size = trampoff;
6374
6375 if (link_info->shared)
6376 {
6377 stub = shared_stub_entry;
6378 size = ARRAY_SIZE (shared_stub_entry);
6379 }
6380 else
6381 {
6382 stub = stub_entry;
6383 size = ARRAY_SIZE (stub_entry);
6384 }
6385
6386 i = 0;
6387 while (dest < contents + trampoff)
6388 {
6389 bfd_put_32 (abfd, stub[i], dest);
6390 i++;
6391 if (i == size)
6392 i = 0;
6393 dest += 4;
6394 }
6395 BFD_ASSERT (i == 0);
6396 }
6397
6398 if (isymbuf != NULL
6399 && symtab_hdr->contents != (unsigned char *) isymbuf)
6400 {
6401 if (! link_info->keep_memory)
6402 free (isymbuf);
6403 else
6404 {
6405 /* Cache the symbols for elf_link_input_bfd. */
6406 symtab_hdr->contents = (unsigned char *) isymbuf;
6407 }
6408 }
6409
6410 if (contents != NULL
6411 && elf_section_data (isec)->this_hdr.contents != contents)
6412 {
6413 if (!changes && !link_info->keep_memory)
6414 free (contents);
6415 else
6416 {
6417 /* Cache the section contents for elf_link_input_bfd. */
6418 elf_section_data (isec)->this_hdr.contents = contents;
6419 }
6420 }
6421
6422 if (changes != 0)
6423 {
6424 /* Append sufficient NOP relocs so we can write out relocation
6425 information for the trampolines. */
6426 Elf_Internal_Shdr *rel_hdr;
6427 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6428 * sizeof (*new_relocs));
6429 unsigned ix;
6430
6431 if (!new_relocs)
6432 goto error_return;
6433 memcpy (new_relocs, internal_relocs,
6434 isec->reloc_count * sizeof (*new_relocs));
6435 for (ix = changes; ix--;)
6436 {
6437 irel = new_relocs + ix + isec->reloc_count;
6438
6439 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6440 }
6441 if (internal_relocs != elf_section_data (isec)->relocs)
6442 free (internal_relocs);
6443 elf_section_data (isec)->relocs = new_relocs;
6444 isec->reloc_count += changes;
6445 rel_hdr = _bfd_elf_single_rel_hdr (isec);
6446 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
6447 }
6448 else if (elf_section_data (isec)->relocs != internal_relocs)
6449 free (internal_relocs);
6450
6451 *again = changes != 0;
6452 if (!*again && link_info->relocatable)
6453 {
6454 /* Convert the internal relax relocs to external form. */
6455 for (irel = internal_relocs; irel < irelend; irel++)
6456 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
6457 {
6458 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6459
6460 /* Rewrite the reloc and convert one of the trailing nop
6461 relocs to describe this relocation. */
6462 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6463 /* The relocs are at the bottom 2 bytes */
6464 irel[0].r_offset += 2;
6465 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6466 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6467 irel[1].r_offset += 4;
6468 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6469 irel++;
6470 }
6471 }
6472
6473 return TRUE;
6474
6475 error_return:
6476 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6477 free (isymbuf);
6478 if (contents != NULL
6479 && elf_section_data (isec)->this_hdr.contents != contents)
6480 free (contents);
6481 if (internal_relocs != NULL
6482 && elf_section_data (isec)->relocs != internal_relocs)
6483 free (internal_relocs);
6484 return FALSE;
6485 }
6486 \f
6487 /* What to do when ld finds relocations against symbols defined in
6488 discarded sections. */
6489
6490 static unsigned int
6491 ppc_elf_action_discarded (asection *sec)
6492 {
6493 if (strcmp (".fixup", sec->name) == 0)
6494 return 0;
6495
6496 if (strcmp (".got2", sec->name) == 0)
6497 return 0;
6498
6499 return _bfd_elf_default_action_discarded (sec);
6500 }
6501 \f
6502 /* Fill in the address for a pointer generated in a linker section. */
6503
6504 static bfd_vma
6505 elf_finish_pointer_linker_section (bfd *input_bfd,
6506 elf_linker_section_t *lsect,
6507 struct elf_link_hash_entry *h,
6508 bfd_vma relocation,
6509 const Elf_Internal_Rela *rel)
6510 {
6511 elf_linker_section_pointers_t *linker_section_ptr;
6512
6513 BFD_ASSERT (lsect != NULL);
6514
6515 if (h != NULL)
6516 {
6517 /* Handle global symbol. */
6518 struct ppc_elf_link_hash_entry *eh;
6519
6520 eh = (struct ppc_elf_link_hash_entry *) h;
6521 BFD_ASSERT (eh->elf.def_regular);
6522 linker_section_ptr = eh->linker_section_pointer;
6523 }
6524 else
6525 {
6526 /* Handle local symbol. */
6527 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6528
6529 BFD_ASSERT (is_ppc_elf (input_bfd));
6530 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6531 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6532 }
6533
6534 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6535 rel->r_addend,
6536 lsect);
6537 BFD_ASSERT (linker_section_ptr != NULL);
6538
6539 /* Offset will always be a multiple of four, so use the bottom bit
6540 as a "written" flag. */
6541 if ((linker_section_ptr->offset & 1) == 0)
6542 {
6543 bfd_put_32 (lsect->section->owner,
6544 relocation + linker_section_ptr->addend,
6545 lsect->section->contents + linker_section_ptr->offset);
6546 linker_section_ptr->offset += 1;
6547 }
6548
6549 relocation = (lsect->section->output_section->vma
6550 + lsect->section->output_offset
6551 + linker_section_ptr->offset - 1
6552 - SYM_VAL (lsect->sym));
6553
6554 #ifdef DEBUG
6555 fprintf (stderr,
6556 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6557 lsect->name, (long) relocation, (long) relocation);
6558 #endif
6559
6560 return relocation;
6561 }
6562
6563 #define PPC_LO(v) ((v) & 0xffff)
6564 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6565 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6566
6567 static void
6568 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
6569 struct bfd_link_info *info)
6570 {
6571 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6572 bfd *output_bfd = info->output_bfd;
6573 bfd_vma plt;
6574
6575 plt = ((ent->plt.offset & ~1)
6576 + plt_sec->output_section->vma
6577 + plt_sec->output_offset);
6578
6579 if (info->shared)
6580 {
6581 bfd_vma got = 0;
6582
6583 if (ent->addend >= 32768)
6584 got = (ent->addend
6585 + ent->sec->output_section->vma
6586 + ent->sec->output_offset);
6587 else if (htab->elf.hgot != NULL)
6588 got = SYM_VAL (htab->elf.hgot);
6589
6590 plt -= got;
6591
6592 if (plt + 0x8000 < 0x10000)
6593 {
6594 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6595 p += 4;
6596 bfd_put_32 (output_bfd, MTCTR_11, p);
6597 p += 4;
6598 bfd_put_32 (output_bfd, BCTR, p);
6599 p += 4;
6600 bfd_put_32 (output_bfd, NOP, p);
6601 p += 4;
6602 }
6603 else
6604 {
6605 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6606 p += 4;
6607 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6608 p += 4;
6609 bfd_put_32 (output_bfd, MTCTR_11, p);
6610 p += 4;
6611 bfd_put_32 (output_bfd, BCTR, p);
6612 p += 4;
6613 }
6614 }
6615 else
6616 {
6617 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6618 p += 4;
6619 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6620 p += 4;
6621 bfd_put_32 (output_bfd, MTCTR_11, p);
6622 p += 4;
6623 bfd_put_32 (output_bfd, BCTR, p);
6624 p += 4;
6625 }
6626 }
6627
6628 /* Return true if symbol is defined statically. */
6629
6630 static bfd_boolean
6631 is_static_defined (struct elf_link_hash_entry *h)
6632 {
6633 return ((h->root.type == bfd_link_hash_defined
6634 || h->root.type == bfd_link_hash_defweak)
6635 && h->root.u.def.section != NULL
6636 && h->root.u.def.section->output_section != NULL);
6637 }
6638
6639 /* If INSN is an opcode that may be used with an @tls operand, return
6640 the transformed insn for TLS optimisation, otherwise return 0. If
6641 REG is non-zero only match an insn with RB or RA equal to REG. */
6642
6643 unsigned int
6644 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
6645 {
6646 unsigned int rtra;
6647
6648 if ((insn & (0x3f << 26)) != 31 << 26)
6649 return 0;
6650
6651 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
6652 rtra = insn & ((1 << 26) - (1 << 16));
6653 else if (((insn >> 16) & 0x1f) == reg)
6654 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
6655 else
6656 return 0;
6657
6658 if ((insn & (0x3ff << 1)) == 266 << 1)
6659 /* add -> addi. */
6660 insn = 14 << 26;
6661 else if ((insn & (0x1f << 1)) == 23 << 1
6662 && ((insn & (0x1f << 6)) < 14 << 6
6663 || ((insn & (0x1f << 6)) >= 16 << 6
6664 && (insn & (0x1f << 6)) < 24 << 6)))
6665 /* load and store indexed -> dform. */
6666 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
6667 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
6668 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6669 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
6670 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
6671 /* lwax -> lwa. */
6672 insn = (58 << 26) | 2;
6673 else
6674 return 0;
6675 insn |= rtra;
6676 return insn;
6677 }
6678
6679 /* If INSN is an opcode that may be used with an @tprel operand, return
6680 the transformed insn for an undefined weak symbol, ie. with the
6681 thread pointer REG operand removed. Otherwise return 0. */
6682
6683 unsigned int
6684 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
6685 {
6686 if ((insn & (0x1f << 16)) == reg << 16
6687 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6688 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
6689 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6690 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6691 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6692 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6693 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6694 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6695 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6696 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6697 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6698 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6699 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6700 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6701 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6702 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6703 && (insn & 3) != 1)
6704 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6705 && ((insn & 3) == 0 || (insn & 3) == 3))))
6706 {
6707 insn &= ~(0x1f << 16);
6708 }
6709 else if ((insn & (0x1f << 21)) == reg << 21
6710 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
6711 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
6712 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
6713 {
6714 insn &= ~(0x1f << 21);
6715 insn |= (insn & (0x1f << 16)) << 5;
6716 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
6717 insn -= 2 >> 26; /* convert to ori,oris */
6718 }
6719 else
6720 insn = 0;
6721 return insn;
6722 }
6723
6724 /* The RELOCATE_SECTION function is called by the ELF backend linker
6725 to handle the relocations for a section.
6726
6727 The relocs are always passed as Rela structures; if the section
6728 actually uses Rel structures, the r_addend field will always be
6729 zero.
6730
6731 This function is responsible for adjust the section contents as
6732 necessary, and (if using Rela relocs and generating a
6733 relocatable output file) adjusting the reloc addend as
6734 necessary.
6735
6736 This function does not have to worry about setting the reloc
6737 address or the reloc symbol index.
6738
6739 LOCAL_SYMS is a pointer to the swapped in local symbols.
6740
6741 LOCAL_SECTIONS is an array giving the section in the input file
6742 corresponding to the st_shndx field of each local symbol.
6743
6744 The global hash table entry for the global symbols can be found
6745 via elf_sym_hashes (input_bfd).
6746
6747 When generating relocatable output, this function must handle
6748 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6749 going to be the section symbol corresponding to the output
6750 section, which means that the addend must be adjusted
6751 accordingly. */
6752
6753 static bfd_boolean
6754 ppc_elf_relocate_section (bfd *output_bfd,
6755 struct bfd_link_info *info,
6756 bfd *input_bfd,
6757 asection *input_section,
6758 bfd_byte *contents,
6759 Elf_Internal_Rela *relocs,
6760 Elf_Internal_Sym *local_syms,
6761 asection **local_sections)
6762 {
6763 Elf_Internal_Shdr *symtab_hdr;
6764 struct elf_link_hash_entry **sym_hashes;
6765 struct ppc_elf_link_hash_table *htab;
6766 Elf_Internal_Rela *rel;
6767 Elf_Internal_Rela *relend;
6768 Elf_Internal_Rela outrel;
6769 asection *got2, *sreloc = NULL;
6770 bfd_vma *local_got_offsets;
6771 bfd_boolean ret = TRUE;
6772 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6773 bfd_boolean is_vxworks_tls;
6774
6775 #ifdef DEBUG
6776 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6777 "%ld relocations%s",
6778 input_bfd, input_section,
6779 (long) input_section->reloc_count,
6780 (info->relocatable) ? " (relocatable)" : "");
6781 #endif
6782
6783 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6784
6785 /* Initialize howto table if not already done. */
6786 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6787 ppc_elf_howto_init ();
6788
6789 htab = ppc_elf_hash_table (info);
6790 local_got_offsets = elf_local_got_offsets (input_bfd);
6791 symtab_hdr = &elf_symtab_hdr (input_bfd);
6792 sym_hashes = elf_sym_hashes (input_bfd);
6793 /* We have to handle relocations in vxworks .tls_vars sections
6794 specially, because the dynamic loader is 'weird'. */
6795 is_vxworks_tls = (htab->is_vxworks && info->shared
6796 && !strcmp (input_section->output_section->name,
6797 ".tls_vars"));
6798 rel = relocs;
6799 relend = relocs + input_section->reloc_count;
6800 for (; rel < relend; rel++)
6801 {
6802 enum elf_ppc_reloc_type r_type;
6803 bfd_vma addend;
6804 bfd_reloc_status_type r;
6805 Elf_Internal_Sym *sym;
6806 asection *sec;
6807 struct elf_link_hash_entry *h;
6808 const char *sym_name;
6809 reloc_howto_type *howto;
6810 unsigned long r_symndx;
6811 bfd_vma relocation;
6812 bfd_vma branch_bit, from;
6813 bfd_boolean unresolved_reloc;
6814 bfd_boolean warned;
6815 unsigned int tls_type, tls_mask, tls_gd;
6816 struct plt_entry **ifunc;
6817
6818 r_type = ELF32_R_TYPE (rel->r_info);
6819 sym = NULL;
6820 sec = NULL;
6821 h = NULL;
6822 unresolved_reloc = FALSE;
6823 warned = FALSE;
6824 r_symndx = ELF32_R_SYM (rel->r_info);
6825
6826 if (r_symndx < symtab_hdr->sh_info)
6827 {
6828 sym = local_syms + r_symndx;
6829 sec = local_sections[r_symndx];
6830 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6831
6832 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6833 }
6834 else
6835 {
6836 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6837 r_symndx, symtab_hdr, sym_hashes,
6838 h, sec, relocation,
6839 unresolved_reloc, warned);
6840
6841 sym_name = h->root.root.string;
6842 }
6843
6844 if (sec != NULL && elf_discarded_section (sec))
6845 {
6846 /* For relocs against symbols from removed linkonce sections,
6847 or sections discarded by a linker script, we just want the
6848 section contents zeroed. Avoid any special processing. */
6849 howto = NULL;
6850 if (r_type < R_PPC_max)
6851 howto = ppc_elf_howto_table[r_type];
6852 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
6853 rel, relend, howto, contents);
6854 }
6855
6856 if (info->relocatable)
6857 {
6858 if (got2 != NULL
6859 && r_type == R_PPC_PLTREL24
6860 && rel->r_addend >= 32768)
6861 {
6862 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6863 addend specifies the GOT pointer offset within .got2. */
6864 rel->r_addend += got2->output_offset;
6865 }
6866 continue;
6867 }
6868
6869 /* TLS optimizations. Replace instruction sequences and relocs
6870 based on information we collected in tls_optimize. We edit
6871 RELOCS so that --emit-relocs will output something sensible
6872 for the final instruction stream. */
6873 tls_mask = 0;
6874 tls_gd = 0;
6875 if (h != NULL)
6876 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6877 else if (local_got_offsets != NULL)
6878 {
6879 struct plt_entry **local_plt;
6880 char *lgot_masks;
6881 local_plt
6882 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6883 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6884 tls_mask = lgot_masks[r_symndx];
6885 }
6886
6887 /* Ensure reloc mapping code below stays sane. */
6888 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6889 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6890 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6891 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6892 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6893 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6894 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6895 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6896 abort ();
6897 switch (r_type)
6898 {
6899 default:
6900 break;
6901
6902 case R_PPC_GOT_TPREL16:
6903 case R_PPC_GOT_TPREL16_LO:
6904 if ((tls_mask & TLS_TLS) != 0
6905 && (tls_mask & TLS_TPREL) == 0)
6906 {
6907 bfd_vma insn;
6908
6909 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6910 insn &= 31 << 21;
6911 insn |= 0x3c020000; /* addis 0,2,0 */
6912 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6913 r_type = R_PPC_TPREL16_HA;
6914 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6915 }
6916 break;
6917
6918 case R_PPC_TLS:
6919 if ((tls_mask & TLS_TLS) != 0
6920 && (tls_mask & TLS_TPREL) == 0)
6921 {
6922 bfd_vma insn;
6923
6924 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6925 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
6926 if (insn == 0)
6927 abort ();
6928 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6929 r_type = R_PPC_TPREL16_LO;
6930 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6931
6932 /* Was PPC_TLS which sits on insn boundary, now
6933 PPC_TPREL16_LO which is at low-order half-word. */
6934 rel->r_offset += d_offset;
6935 }
6936 break;
6937
6938 case R_PPC_GOT_TLSGD16_HI:
6939 case R_PPC_GOT_TLSGD16_HA:
6940 tls_gd = TLS_TPRELGD;
6941 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6942 goto tls_gdld_hi;
6943 break;
6944
6945 case R_PPC_GOT_TLSLD16_HI:
6946 case R_PPC_GOT_TLSLD16_HA:
6947 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6948 {
6949 tls_gdld_hi:
6950 if ((tls_mask & tls_gd) != 0)
6951 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6952 + R_PPC_GOT_TPREL16);
6953 else
6954 {
6955 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6956 rel->r_offset -= d_offset;
6957 r_type = R_PPC_NONE;
6958 }
6959 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6960 }
6961 break;
6962
6963 case R_PPC_GOT_TLSGD16:
6964 case R_PPC_GOT_TLSGD16_LO:
6965 tls_gd = TLS_TPRELGD;
6966 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6967 goto tls_ldgd_opt;
6968 break;
6969
6970 case R_PPC_GOT_TLSLD16:
6971 case R_PPC_GOT_TLSLD16_LO:
6972 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6973 {
6974 unsigned int insn1, insn2;
6975 bfd_vma offset;
6976
6977 tls_ldgd_opt:
6978 offset = (bfd_vma) -1;
6979 /* If not using the newer R_PPC_TLSGD/LD to mark
6980 __tls_get_addr calls, we must trust that the call
6981 stays with its arg setup insns, ie. that the next
6982 reloc is the __tls_get_addr call associated with
6983 the current reloc. Edit both insns. */
6984 if (input_section->has_tls_get_addr_call
6985 && rel + 1 < relend
6986 && branch_reloc_hash_match (input_bfd, rel + 1,
6987 htab->tls_get_addr))
6988 offset = rel[1].r_offset;
6989 if ((tls_mask & tls_gd) != 0)
6990 {
6991 /* IE */
6992 insn1 = bfd_get_32 (output_bfd,
6993 contents + rel->r_offset - d_offset);
6994 insn1 &= (1 << 26) - 1;
6995 insn1 |= 32 << 26; /* lwz */
6996 if (offset != (bfd_vma) -1)
6997 {
6998 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
6999 insn2 = 0x7c631214; /* add 3,3,2 */
7000 bfd_put_32 (output_bfd, insn2, contents + offset);
7001 }
7002 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7003 + R_PPC_GOT_TPREL16);
7004 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7005 }
7006 else
7007 {
7008 /* LE */
7009 insn1 = 0x3c620000; /* addis 3,2,0 */
7010 if (tls_gd == 0)
7011 {
7012 /* Was an LD reloc. */
7013 for (r_symndx = 0;
7014 r_symndx < symtab_hdr->sh_info;
7015 r_symndx++)
7016 if (local_sections[r_symndx] == sec)
7017 break;
7018 if (r_symndx >= symtab_hdr->sh_info)
7019 r_symndx = STN_UNDEF;
7020 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7021 if (r_symndx != STN_UNDEF)
7022 rel->r_addend -= (local_syms[r_symndx].st_value
7023 + sec->output_offset
7024 + sec->output_section->vma);
7025 }
7026 r_type = R_PPC_TPREL16_HA;
7027 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7028 if (offset != (bfd_vma) -1)
7029 {
7030 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7031 rel[1].r_offset = offset + d_offset;
7032 rel[1].r_addend = rel->r_addend;
7033 insn2 = 0x38630000; /* addi 3,3,0 */
7034 bfd_put_32 (output_bfd, insn2, contents + offset);
7035 }
7036 }
7037 bfd_put_32 (output_bfd, insn1,
7038 contents + rel->r_offset - d_offset);
7039 if (tls_gd == 0)
7040 {
7041 /* We changed the symbol on an LD reloc. Start over
7042 in order to get h, sym, sec etc. right. */
7043 rel--;
7044 continue;
7045 }
7046 }
7047 break;
7048
7049 case R_PPC_TLSGD:
7050 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7051 {
7052 unsigned int insn2;
7053 bfd_vma offset = rel->r_offset;
7054
7055 if ((tls_mask & TLS_TPRELGD) != 0)
7056 {
7057 /* IE */
7058 r_type = R_PPC_NONE;
7059 insn2 = 0x7c631214; /* add 3,3,2 */
7060 }
7061 else
7062 {
7063 /* LE */
7064 r_type = R_PPC_TPREL16_LO;
7065 rel->r_offset += d_offset;
7066 insn2 = 0x38630000; /* addi 3,3,0 */
7067 }
7068 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7069 bfd_put_32 (output_bfd, insn2, contents + offset);
7070 /* Zap the reloc on the _tls_get_addr call too. */
7071 BFD_ASSERT (offset == rel[1].r_offset);
7072 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7073 }
7074 break;
7075
7076 case R_PPC_TLSLD:
7077 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7078 {
7079 unsigned int insn2;
7080
7081 for (r_symndx = 0;
7082 r_symndx < symtab_hdr->sh_info;
7083 r_symndx++)
7084 if (local_sections[r_symndx] == sec)
7085 break;
7086 if (r_symndx >= symtab_hdr->sh_info)
7087 r_symndx = STN_UNDEF;
7088 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7089 if (r_symndx != STN_UNDEF)
7090 rel->r_addend -= (local_syms[r_symndx].st_value
7091 + sec->output_offset
7092 + sec->output_section->vma);
7093
7094 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7095 rel->r_offset += d_offset;
7096 insn2 = 0x38630000; /* addi 3,3,0 */
7097 bfd_put_32 (output_bfd, insn2,
7098 contents + rel->r_offset - d_offset);
7099 /* Zap the reloc on the _tls_get_addr call too. */
7100 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7101 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7102 rel--;
7103 continue;
7104 }
7105 break;
7106 }
7107
7108 /* Handle other relocations that tweak non-addend part of insn. */
7109 branch_bit = 0;
7110 switch (r_type)
7111 {
7112 default:
7113 break;
7114
7115 /* Branch taken prediction relocations. */
7116 case R_PPC_ADDR14_BRTAKEN:
7117 case R_PPC_REL14_BRTAKEN:
7118 branch_bit = BRANCH_PREDICT_BIT;
7119 /* Fall thru */
7120
7121 /* Branch not taken prediction relocations. */
7122 case R_PPC_ADDR14_BRNTAKEN:
7123 case R_PPC_REL14_BRNTAKEN:
7124 {
7125 bfd_vma insn;
7126
7127 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7128 insn &= ~BRANCH_PREDICT_BIT;
7129 insn |= branch_bit;
7130
7131 from = (rel->r_offset
7132 + input_section->output_offset
7133 + input_section->output_section->vma);
7134
7135 /* Invert 'y' bit if not the default. */
7136 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7137 insn ^= BRANCH_PREDICT_BIT;
7138
7139 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7140 break;
7141 }
7142 }
7143
7144 ifunc = NULL;
7145 if (!htab->is_vxworks)
7146 {
7147 struct plt_entry *ent;
7148
7149 if (h != NULL)
7150 {
7151 if (h->type == STT_GNU_IFUNC)
7152 ifunc = &h->plt.plist;
7153 }
7154 else if (local_got_offsets != NULL
7155 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7156 {
7157 struct plt_entry **local_plt;
7158
7159 local_plt = (struct plt_entry **) (local_got_offsets
7160 + symtab_hdr->sh_info);
7161 ifunc = local_plt + r_symndx;
7162 }
7163
7164 ent = NULL;
7165 if (ifunc != NULL
7166 && (!info->shared
7167 || is_branch_reloc (r_type)))
7168 {
7169 addend = 0;
7170 if (r_type == R_PPC_PLTREL24 && info->shared)
7171 addend = rel->r_addend;
7172 ent = find_plt_ent (ifunc, got2, addend);
7173 }
7174 if (ent != NULL)
7175 {
7176 if (h == NULL && (ent->plt.offset & 1) == 0)
7177 {
7178 Elf_Internal_Rela rela;
7179 bfd_byte *loc;
7180
7181 rela.r_offset = (htab->iplt->output_section->vma
7182 + htab->iplt->output_offset
7183 + ent->plt.offset);
7184 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7185 rela.r_addend = relocation;
7186 loc = htab->reliplt->contents;
7187 loc += (htab->reliplt->reloc_count++
7188 * sizeof (Elf32_External_Rela));
7189 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7190
7191 ent->plt.offset |= 1;
7192 }
7193 if (h == NULL && (ent->glink_offset & 1) == 0)
7194 {
7195 unsigned char *p = ((unsigned char *) htab->glink->contents
7196 + ent->glink_offset);
7197 write_glink_stub (ent, htab->iplt, p, info);
7198 ent->glink_offset |= 1;
7199 }
7200
7201 unresolved_reloc = FALSE;
7202 if (htab->plt_type == PLT_NEW
7203 || !htab->elf.dynamic_sections_created
7204 || h == NULL)
7205 relocation = (htab->glink->output_section->vma
7206 + htab->glink->output_offset
7207 + (ent->glink_offset & ~1));
7208 else
7209 relocation = (htab->plt->output_section->vma
7210 + htab->plt->output_offset
7211 + ent->plt.offset);
7212 }
7213 }
7214
7215 addend = rel->r_addend;
7216 tls_type = 0;
7217 howto = NULL;
7218 if (r_type < R_PPC_max)
7219 howto = ppc_elf_howto_table[r_type];
7220 switch (r_type)
7221 {
7222 default:
7223 (*_bfd_error_handler)
7224 (_("%B: unknown relocation type %d for symbol %s"),
7225 input_bfd, (int) r_type, sym_name);
7226
7227 bfd_set_error (bfd_error_bad_value);
7228 ret = FALSE;
7229 continue;
7230
7231 case R_PPC_NONE:
7232 case R_PPC_TLS:
7233 case R_PPC_TLSGD:
7234 case R_PPC_TLSLD:
7235 case R_PPC_EMB_MRKREF:
7236 case R_PPC_GNU_VTINHERIT:
7237 case R_PPC_GNU_VTENTRY:
7238 continue;
7239
7240 /* GOT16 relocations. Like an ADDR16 using the symbol's
7241 address in the GOT as relocation value instead of the
7242 symbol's value itself. Also, create a GOT entry for the
7243 symbol and put the symbol value there. */
7244 case R_PPC_GOT_TLSGD16:
7245 case R_PPC_GOT_TLSGD16_LO:
7246 case R_PPC_GOT_TLSGD16_HI:
7247 case R_PPC_GOT_TLSGD16_HA:
7248 tls_type = TLS_TLS | TLS_GD;
7249 goto dogot;
7250
7251 case R_PPC_GOT_TLSLD16:
7252 case R_PPC_GOT_TLSLD16_LO:
7253 case R_PPC_GOT_TLSLD16_HI:
7254 case R_PPC_GOT_TLSLD16_HA:
7255 tls_type = TLS_TLS | TLS_LD;
7256 goto dogot;
7257
7258 case R_PPC_GOT_TPREL16:
7259 case R_PPC_GOT_TPREL16_LO:
7260 case R_PPC_GOT_TPREL16_HI:
7261 case R_PPC_GOT_TPREL16_HA:
7262 tls_type = TLS_TLS | TLS_TPREL;
7263 goto dogot;
7264
7265 case R_PPC_GOT_DTPREL16:
7266 case R_PPC_GOT_DTPREL16_LO:
7267 case R_PPC_GOT_DTPREL16_HI:
7268 case R_PPC_GOT_DTPREL16_HA:
7269 tls_type = TLS_TLS | TLS_DTPREL;
7270 goto dogot;
7271
7272 case R_PPC_GOT16:
7273 case R_PPC_GOT16_LO:
7274 case R_PPC_GOT16_HI:
7275 case R_PPC_GOT16_HA:
7276 tls_mask = 0;
7277 dogot:
7278 {
7279 /* Relocation is to the entry for this symbol in the global
7280 offset table. */
7281 bfd_vma off;
7282 bfd_vma *offp;
7283 unsigned long indx;
7284
7285 if (htab->got == NULL)
7286 abort ();
7287
7288 indx = 0;
7289 if (tls_type == (TLS_TLS | TLS_LD)
7290 && (h == NULL
7291 || !h->def_dynamic))
7292 offp = &htab->tlsld_got.offset;
7293 else if (h != NULL)
7294 {
7295 bfd_boolean dyn;
7296 dyn = htab->elf.dynamic_sections_created;
7297 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7298 || (info->shared
7299 && SYMBOL_REFERENCES_LOCAL (info, h)))
7300 /* This is actually a static link, or it is a
7301 -Bsymbolic link and the symbol is defined
7302 locally, or the symbol was forced to be local
7303 because of a version file. */
7304 ;
7305 else
7306 {
7307 indx = h->dynindx;
7308 unresolved_reloc = FALSE;
7309 }
7310 offp = &h->got.offset;
7311 }
7312 else
7313 {
7314 if (local_got_offsets == NULL)
7315 abort ();
7316 offp = &local_got_offsets[r_symndx];
7317 }
7318
7319 /* The offset must always be a multiple of 4. We use the
7320 least significant bit to record whether we have already
7321 processed this entry. */
7322 off = *offp;
7323 if ((off & 1) != 0)
7324 off &= ~1;
7325 else
7326 {
7327 unsigned int tls_m = (tls_mask
7328 & (TLS_LD | TLS_GD | TLS_DTPREL
7329 | TLS_TPREL | TLS_TPRELGD));
7330
7331 if (offp == &htab->tlsld_got.offset)
7332 tls_m = TLS_LD;
7333 else if (h == NULL
7334 || !h->def_dynamic)
7335 tls_m &= ~TLS_LD;
7336
7337 /* We might have multiple got entries for this sym.
7338 Initialize them all. */
7339 do
7340 {
7341 int tls_ty = 0;
7342
7343 if ((tls_m & TLS_LD) != 0)
7344 {
7345 tls_ty = TLS_TLS | TLS_LD;
7346 tls_m &= ~TLS_LD;
7347 }
7348 else if ((tls_m & TLS_GD) != 0)
7349 {
7350 tls_ty = TLS_TLS | TLS_GD;
7351 tls_m &= ~TLS_GD;
7352 }
7353 else if ((tls_m & TLS_DTPREL) != 0)
7354 {
7355 tls_ty = TLS_TLS | TLS_DTPREL;
7356 tls_m &= ~TLS_DTPREL;
7357 }
7358 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7359 {
7360 tls_ty = TLS_TLS | TLS_TPREL;
7361 tls_m = 0;
7362 }
7363
7364 /* Generate relocs for the dynamic linker. */
7365 if ((info->shared || indx != 0)
7366 && (offp == &htab->tlsld_got.offset
7367 || h == NULL
7368 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7369 || h->root.type != bfd_link_hash_undefweak))
7370 {
7371 asection *rsec = htab->relgot;
7372 bfd_byte * loc;
7373
7374 outrel.r_offset = (htab->got->output_section->vma
7375 + htab->got->output_offset
7376 + off);
7377 outrel.r_addend = 0;
7378 if (tls_ty & (TLS_LD | TLS_GD))
7379 {
7380 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7381 if (tls_ty == (TLS_TLS | TLS_GD))
7382 {
7383 loc = rsec->contents;
7384 loc += (rsec->reloc_count++
7385 * sizeof (Elf32_External_Rela));
7386 bfd_elf32_swap_reloca_out (output_bfd,
7387 &outrel, loc);
7388 outrel.r_offset += 4;
7389 outrel.r_info
7390 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7391 }
7392 }
7393 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7394 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7395 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7396 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7397 else if (indx != 0)
7398 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7399 else if (ifunc != NULL)
7400 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7401 else
7402 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7403 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7404 {
7405 outrel.r_addend += relocation;
7406 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7407 outrel.r_addend -= htab->elf.tls_sec->vma;
7408 }
7409 loc = rsec->contents;
7410 loc += (rsec->reloc_count++
7411 * sizeof (Elf32_External_Rela));
7412 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7413 }
7414
7415 /* Init the .got section contents if we're not
7416 emitting a reloc. */
7417 else
7418 {
7419 bfd_vma value = relocation;
7420
7421 if (tls_ty == (TLS_TLS | TLS_LD))
7422 value = 1;
7423 else if (tls_ty != 0)
7424 {
7425 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7426 if (tls_ty == (TLS_TLS | TLS_TPREL))
7427 value += DTP_OFFSET - TP_OFFSET;
7428
7429 if (tls_ty == (TLS_TLS | TLS_GD))
7430 {
7431 bfd_put_32 (output_bfd, value,
7432 htab->got->contents + off + 4);
7433 value = 1;
7434 }
7435 }
7436 bfd_put_32 (output_bfd, value,
7437 htab->got->contents + off);
7438 }
7439
7440 off += 4;
7441 if (tls_ty & (TLS_LD | TLS_GD))
7442 off += 4;
7443 }
7444 while (tls_m != 0);
7445
7446 off = *offp;
7447 *offp = off | 1;
7448 }
7449
7450 if (off >= (bfd_vma) -2)
7451 abort ();
7452
7453 if ((tls_type & TLS_TLS) != 0)
7454 {
7455 if (tls_type != (TLS_TLS | TLS_LD))
7456 {
7457 if ((tls_mask & TLS_LD) != 0
7458 && !(h == NULL
7459 || !h->def_dynamic))
7460 off += 8;
7461 if (tls_type != (TLS_TLS | TLS_GD))
7462 {
7463 if ((tls_mask & TLS_GD) != 0)
7464 off += 8;
7465 if (tls_type != (TLS_TLS | TLS_DTPREL))
7466 {
7467 if ((tls_mask & TLS_DTPREL) != 0)
7468 off += 4;
7469 }
7470 }
7471 }
7472 }
7473
7474 relocation = (htab->got->output_section->vma
7475 + htab->got->output_offset
7476 + off
7477 - SYM_VAL (htab->elf.hgot));
7478
7479 /* Addends on got relocations don't make much sense.
7480 x+off@got is actually x@got+off, and since the got is
7481 generated by a hash table traversal, the value in the
7482 got at entry m+n bears little relation to the entry m. */
7483 if (addend != 0)
7484 (*_bfd_error_handler)
7485 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
7486 input_bfd,
7487 input_section,
7488 (long) rel->r_offset,
7489 howto->name,
7490 sym_name);
7491 }
7492 break;
7493
7494 /* Relocations that need no special processing. */
7495 case R_PPC_LOCAL24PC:
7496 /* It makes no sense to point a local relocation
7497 at a symbol not in this object. */
7498 if (unresolved_reloc)
7499 {
7500 if (! (*info->callbacks->undefined_symbol) (info,
7501 h->root.root.string,
7502 input_bfd,
7503 input_section,
7504 rel->r_offset,
7505 TRUE))
7506 return FALSE;
7507 continue;
7508 }
7509 break;
7510
7511 case R_PPC_DTPREL16:
7512 case R_PPC_DTPREL16_LO:
7513 case R_PPC_DTPREL16_HI:
7514 case R_PPC_DTPREL16_HA:
7515 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7516 break;
7517
7518 /* Relocations that may need to be propagated if this is a shared
7519 object. */
7520 case R_PPC_TPREL16:
7521 case R_PPC_TPREL16_LO:
7522 case R_PPC_TPREL16_HI:
7523 case R_PPC_TPREL16_HA:
7524 if (h != NULL
7525 && h->root.type == bfd_link_hash_undefweak
7526 && h->dynindx == -1)
7527 {
7528 /* Make this relocation against an undefined weak symbol
7529 resolve to zero. This is really just a tweak, since
7530 code using weak externs ought to check that they are
7531 defined before using them. */
7532 bfd_byte *p = contents + rel->r_offset - d_offset;
7533 unsigned int insn = bfd_get_32 (output_bfd, p);
7534 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
7535 if (insn != 0)
7536 bfd_put_32 (output_bfd, insn, p);
7537 break;
7538 }
7539 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7540 /* The TPREL16 relocs shouldn't really be used in shared
7541 libs as they will result in DT_TEXTREL being set, but
7542 support them anyway. */
7543 goto dodyn;
7544
7545 case R_PPC_TPREL32:
7546 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7547 goto dodyn;
7548
7549 case R_PPC_DTPREL32:
7550 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7551 goto dodyn;
7552
7553 case R_PPC_DTPMOD32:
7554 relocation = 1;
7555 addend = 0;
7556 goto dodyn;
7557
7558 case R_PPC_REL16:
7559 case R_PPC_REL16_LO:
7560 case R_PPC_REL16_HI:
7561 case R_PPC_REL16_HA:
7562 break;
7563
7564 case R_PPC_REL32:
7565 if (h == NULL || h == htab->elf.hgot)
7566 break;
7567 /* fall through */
7568
7569 case R_PPC_ADDR32:
7570 case R_PPC_ADDR16:
7571 case R_PPC_ADDR16_LO:
7572 case R_PPC_ADDR16_HI:
7573 case R_PPC_ADDR16_HA:
7574 case R_PPC_UADDR32:
7575 case R_PPC_UADDR16:
7576 goto dodyn;
7577
7578 case R_PPC_REL24:
7579 case R_PPC_REL14:
7580 case R_PPC_REL14_BRTAKEN:
7581 case R_PPC_REL14_BRNTAKEN:
7582 /* If these relocations are not to a named symbol, they can be
7583 handled right here, no need to bother the dynamic linker. */
7584 if (SYMBOL_CALLS_LOCAL (info, h)
7585 || h == htab->elf.hgot)
7586 break;
7587 /* fall through */
7588
7589 case R_PPC_ADDR24:
7590 case R_PPC_ADDR14:
7591 case R_PPC_ADDR14_BRTAKEN:
7592 case R_PPC_ADDR14_BRNTAKEN:
7593 if (h != NULL && !info->shared)
7594 break;
7595 /* fall through */
7596
7597 dodyn:
7598 if ((input_section->flags & SEC_ALLOC) == 0
7599 || is_vxworks_tls)
7600 break;
7601
7602 if ((info->shared
7603 && !(h != NULL
7604 && ((h->root.type == bfd_link_hash_undefined
7605 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7606 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7607 || (h->root.type == bfd_link_hash_undefweak
7608 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7609 && (must_be_dyn_reloc (info, r_type)
7610 || !SYMBOL_CALLS_LOCAL (info, h)))
7611 || (ELIMINATE_COPY_RELOCS
7612 && !info->shared
7613 && h != NULL
7614 && h->dynindx != -1
7615 && !h->non_got_ref
7616 && !h->def_regular))
7617 {
7618 int skip;
7619 bfd_byte * loc;
7620 #ifdef DEBUG
7621 fprintf (stderr, "ppc_elf_relocate_section needs to "
7622 "create relocation for %s\n",
7623 (h && h->root.root.string
7624 ? h->root.root.string : "<unknown>"));
7625 #endif
7626
7627 /* When generating a shared object, these relocations
7628 are copied into the output file to be resolved at run
7629 time. */
7630 if (sreloc == NULL)
7631 {
7632 sreloc = elf_section_data (input_section)->sreloc;
7633 if (!htab->elf.dynamic_sections_created)
7634 sreloc = htab->reliplt;
7635 if (sreloc == NULL)
7636 return FALSE;
7637 }
7638
7639 skip = 0;
7640 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
7641 input_section,
7642 rel->r_offset);
7643 if (outrel.r_offset == (bfd_vma) -1
7644 || outrel.r_offset == (bfd_vma) -2)
7645 skip = (int) outrel.r_offset;
7646 outrel.r_offset += (input_section->output_section->vma
7647 + input_section->output_offset);
7648
7649 if (skip)
7650 memset (&outrel, 0, sizeof outrel);
7651 else if ((h != NULL
7652 && (h->root.type == bfd_link_hash_undefined
7653 || h->root.type == bfd_link_hash_undefweak))
7654 || !SYMBOL_REFERENCES_LOCAL (info, h))
7655 {
7656 unresolved_reloc = FALSE;
7657 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7658 outrel.r_addend = rel->r_addend;
7659 }
7660 else
7661 {
7662 outrel.r_addend = relocation + rel->r_addend;
7663
7664 if (r_type != R_PPC_ADDR32)
7665 {
7666 long indx = 0;
7667
7668 if (ifunc != NULL)
7669 {
7670 /* If we get here when building a static
7671 executable, then the libc startup function
7672 responsible for applying indirect function
7673 relocations is going to complain about
7674 the reloc type.
7675 If we get here when building a dynamic
7676 executable, it will be because we have
7677 a text relocation. The dynamic loader
7678 will set the text segment writable and
7679 non-executable to apply text relocations.
7680 So we'll segfault when trying to run the
7681 indirection function to resolve the reloc. */
7682 (*_bfd_error_handler)
7683 (_("%B(%A+0x%lx): relocation %s for indirect "
7684 "function %s unsupported"),
7685 input_bfd,
7686 input_section,
7687 (long) rel->r_offset,
7688 howto->name,
7689 sym_name);
7690 ret = FALSE;
7691 }
7692 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
7693 ;
7694 else if (sec == NULL || sec->owner == NULL)
7695 {
7696 bfd_set_error (bfd_error_bad_value);
7697 ret = FALSE;
7698 }
7699 else
7700 {
7701 asection *osec;
7702
7703 /* We are turning this relocation into one
7704 against a section symbol. It would be
7705 proper to subtract the symbol's value,
7706 osec->vma, from the emitted reloc addend,
7707 but ld.so expects buggy relocs.
7708 FIXME: Why not always use a zero index? */
7709 osec = sec->output_section;
7710 indx = elf_section_data (osec)->dynindx;
7711 if (indx == 0)
7712 {
7713 osec = htab->elf.text_index_section;
7714 indx = elf_section_data (osec)->dynindx;
7715 }
7716 BFD_ASSERT (indx != 0);
7717 #ifdef DEBUG
7718 if (indx == 0)
7719 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7720 indx, osec->name, osec->flags,
7721 h->root.root.string);
7722 #endif
7723 }
7724
7725 outrel.r_info = ELF32_R_INFO (indx, r_type);
7726 }
7727 else if (ifunc != NULL)
7728 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7729 else
7730 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7731 }
7732
7733 loc = sreloc->contents;
7734 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7735 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7736
7737 if (skip == -1)
7738 continue;
7739
7740 /* This reloc will be computed at runtime. We clear the memory
7741 so that it contains predictable value. */
7742 if (! skip
7743 && ((input_section->flags & SEC_ALLOC) != 0
7744 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7745 {
7746 relocation = howto->pc_relative ? outrel.r_offset : 0;
7747 addend = 0;
7748 break;
7749 }
7750 }
7751 break;
7752
7753 case R_PPC_RELAX_PLT:
7754 case R_PPC_RELAX_PLTREL24:
7755 if (h != NULL)
7756 {
7757 struct plt_entry *ent;
7758 bfd_vma got2_addend = 0;
7759
7760 if (r_type == R_PPC_RELAX_PLTREL24)
7761 {
7762 if (info->shared)
7763 got2_addend = addend;
7764 addend = 0;
7765 }
7766 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
7767 if (htab->plt_type == PLT_NEW)
7768 relocation = (htab->glink->output_section->vma
7769 + htab->glink->output_offset
7770 + ent->glink_offset);
7771 else
7772 relocation = (htab->plt->output_section->vma
7773 + htab->plt->output_offset
7774 + ent->plt.offset);
7775 }
7776 /* Fall thru */
7777
7778 case R_PPC_RELAX:
7779 if (info->shared)
7780 relocation -= (input_section->output_section->vma
7781 + input_section->output_offset
7782 + rel->r_offset - 4);
7783
7784 {
7785 unsigned long t0;
7786 unsigned long t1;
7787
7788 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7789 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7790
7791 /* We're clearing the bits for R_PPC_ADDR16_HA
7792 and R_PPC_ADDR16_LO here. */
7793 t0 &= ~0xffff;
7794 t1 &= ~0xffff;
7795
7796 /* t0 is HA, t1 is LO */
7797 relocation += addend;
7798 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7799 t1 |= relocation & 0xffff;
7800
7801 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7802 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7803
7804 /* Rewrite the reloc and convert one of the trailing nop
7805 relocs to describe this relocation. */
7806 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7807 /* The relocs are at the bottom 2 bytes */
7808 rel[0].r_offset += 2;
7809 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7810 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7811 rel[1].r_offset += 4;
7812 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7813 rel++;
7814 }
7815 continue;
7816
7817 /* Indirect .sdata relocation. */
7818 case R_PPC_EMB_SDAI16:
7819 BFD_ASSERT (htab->sdata[0].section != NULL);
7820 if (!is_static_defined (htab->sdata[0].sym))
7821 {
7822 unresolved_reloc = TRUE;
7823 break;
7824 }
7825 relocation
7826 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7827 h, relocation, rel);
7828 addend = 0;
7829 break;
7830
7831 /* Indirect .sdata2 relocation. */
7832 case R_PPC_EMB_SDA2I16:
7833 BFD_ASSERT (htab->sdata[1].section != NULL);
7834 if (!is_static_defined (htab->sdata[1].sym))
7835 {
7836 unresolved_reloc = TRUE;
7837 break;
7838 }
7839 relocation
7840 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7841 h, relocation, rel);
7842 addend = 0;
7843 break;
7844
7845 /* Handle the TOC16 reloc. We want to use the offset within the .got
7846 section, not the actual VMA. This is appropriate when generating
7847 an embedded ELF object, for which the .got section acts like the
7848 AIX .toc section. */
7849 case R_PPC_TOC16: /* phony GOT16 relocations */
7850 if (sec == NULL || sec->output_section == NULL)
7851 {
7852 unresolved_reloc = TRUE;
7853 break;
7854 }
7855 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7856 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7857
7858 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7859 break;
7860
7861 case R_PPC_PLTREL24:
7862 if (h == NULL || ifunc != NULL)
7863 break;
7864 /* Relocation is to the entry for this symbol in the
7865 procedure linkage table. */
7866 {
7867 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7868 info->shared ? addend : 0);
7869 addend = 0;
7870 if (ent == NULL
7871 || htab->plt == NULL)
7872 {
7873 /* We didn't make a PLT entry for this symbol. This
7874 happens when statically linking PIC code, or when
7875 using -Bsymbolic. */
7876 break;
7877 }
7878
7879 unresolved_reloc = FALSE;
7880 if (htab->plt_type == PLT_NEW)
7881 relocation = (htab->glink->output_section->vma
7882 + htab->glink->output_offset
7883 + ent->glink_offset);
7884 else
7885 relocation = (htab->plt->output_section->vma
7886 + htab->plt->output_offset
7887 + ent->plt.offset);
7888 }
7889 break;
7890
7891 /* Relocate against _SDA_BASE_. */
7892 case R_PPC_SDAREL16:
7893 {
7894 const char *name;
7895 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
7896
7897 if (sec == NULL
7898 || sec->output_section == NULL
7899 || !is_static_defined (sda))
7900 {
7901 unresolved_reloc = TRUE;
7902 break;
7903 }
7904 addend -= SYM_VAL (sda);
7905
7906 name = bfd_get_section_name (abfd, sec->output_section);
7907 if (! ((CONST_STRNEQ (name, ".sdata")
7908 && (name[6] == 0 || name[6] == '.'))
7909 || (CONST_STRNEQ (name, ".sbss")
7910 && (name[5] == 0 || name[5] == '.'))))
7911 {
7912 (*_bfd_error_handler)
7913 (_("%B: the target (%s) of a %s relocation is "
7914 "in the wrong output section (%s)"),
7915 input_bfd,
7916 sym_name,
7917 howto->name,
7918 name);
7919 }
7920 }
7921 break;
7922
7923 /* Relocate against _SDA2_BASE_. */
7924 case R_PPC_EMB_SDA2REL:
7925 {
7926 const char *name;
7927 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
7928
7929 if (sec == NULL
7930 || sec->output_section == NULL
7931 || !is_static_defined (sda))
7932 {
7933 unresolved_reloc = TRUE;
7934 break;
7935 }
7936 addend -= SYM_VAL (sda);
7937
7938 name = bfd_get_section_name (abfd, sec->output_section);
7939 if (! (CONST_STRNEQ (name, ".sdata2")
7940 || CONST_STRNEQ (name, ".sbss2")))
7941 {
7942 (*_bfd_error_handler)
7943 (_("%B: the target (%s) of a %s relocation is "
7944 "in the wrong output section (%s)"),
7945 input_bfd,
7946 sym_name,
7947 howto->name,
7948 name);
7949 }
7950 }
7951 break;
7952
7953 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7954 case R_PPC_EMB_SDA21:
7955 case R_PPC_EMB_RELSDA:
7956 {
7957 const char *name;
7958 int reg;
7959 struct elf_link_hash_entry *sda = NULL;
7960
7961 if (sec == NULL || sec->output_section == NULL)
7962 {
7963 unresolved_reloc = TRUE;
7964 break;
7965 }
7966
7967 name = bfd_get_section_name (abfd, sec->output_section);
7968 if (((CONST_STRNEQ (name, ".sdata")
7969 && (name[6] == 0 || name[6] == '.'))
7970 || (CONST_STRNEQ (name, ".sbss")
7971 && (name[5] == 0 || name[5] == '.'))))
7972 {
7973 reg = 13;
7974 sda = htab->sdata[0].sym;
7975 }
7976 else if (CONST_STRNEQ (name, ".sdata2")
7977 || CONST_STRNEQ (name, ".sbss2"))
7978 {
7979 reg = 2;
7980 sda = htab->sdata[1].sym;
7981 }
7982 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7983 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7984 {
7985 reg = 0;
7986 }
7987 else
7988 {
7989 (*_bfd_error_handler)
7990 (_("%B: the target (%s) of a %s relocation is "
7991 "in the wrong output section (%s)"),
7992 input_bfd,
7993 sym_name,
7994 howto->name,
7995 name);
7996
7997 bfd_set_error (bfd_error_bad_value);
7998 ret = FALSE;
7999 continue;
8000 }
8001
8002 if (sda != NULL)
8003 {
8004 if (!is_static_defined (sda))
8005 {
8006 unresolved_reloc = TRUE;
8007 break;
8008 }
8009 addend -= SYM_VAL (sda);
8010 }
8011
8012 if (r_type == R_PPC_EMB_SDA21)
8013 {
8014 bfd_vma insn; /* Fill in register field. */
8015
8016 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8017 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8018 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8019 }
8020 }
8021 break;
8022
8023 /* Relocate against the beginning of the section. */
8024 case R_PPC_SECTOFF:
8025 case R_PPC_SECTOFF_LO:
8026 case R_PPC_SECTOFF_HI:
8027 case R_PPC_SECTOFF_HA:
8028 if (sec == NULL || sec->output_section == NULL)
8029 {
8030 unresolved_reloc = TRUE;
8031 break;
8032 }
8033 addend -= sec->output_section->vma;
8034 break;
8035
8036 /* Negative relocations. */
8037 case R_PPC_EMB_NADDR32:
8038 case R_PPC_EMB_NADDR16:
8039 case R_PPC_EMB_NADDR16_LO:
8040 case R_PPC_EMB_NADDR16_HI:
8041 case R_PPC_EMB_NADDR16_HA:
8042 addend -= 2 * relocation;
8043 break;
8044
8045 case R_PPC_COPY:
8046 case R_PPC_GLOB_DAT:
8047 case R_PPC_JMP_SLOT:
8048 case R_PPC_RELATIVE:
8049 case R_PPC_IRELATIVE:
8050 case R_PPC_PLT32:
8051 case R_PPC_PLTREL32:
8052 case R_PPC_PLT16_LO:
8053 case R_PPC_PLT16_HI:
8054 case R_PPC_PLT16_HA:
8055 case R_PPC_ADDR30:
8056 case R_PPC_EMB_RELSEC16:
8057 case R_PPC_EMB_RELST_LO:
8058 case R_PPC_EMB_RELST_HI:
8059 case R_PPC_EMB_RELST_HA:
8060 case R_PPC_EMB_BIT_FLD:
8061 (*_bfd_error_handler)
8062 (_("%B: relocation %s is not yet supported for symbol %s."),
8063 input_bfd,
8064 howto->name,
8065 sym_name);
8066
8067 bfd_set_error (bfd_error_invalid_operation);
8068 ret = FALSE;
8069 continue;
8070 }
8071
8072 /* Do any further special processing. */
8073 switch (r_type)
8074 {
8075 default:
8076 break;
8077
8078 case R_PPC_ADDR16_HA:
8079 case R_PPC_REL16_HA:
8080 case R_PPC_SECTOFF_HA:
8081 case R_PPC_TPREL16_HA:
8082 case R_PPC_DTPREL16_HA:
8083 case R_PPC_EMB_NADDR16_HA:
8084 case R_PPC_EMB_RELST_HA:
8085 /* It's just possible that this symbol is a weak symbol
8086 that's not actually defined anywhere. In that case,
8087 'sec' would be NULL, and we should leave the symbol
8088 alone (it will be set to zero elsewhere in the link). */
8089 if (sec == NULL)
8090 break;
8091 /* Fall thru */
8092
8093 case R_PPC_PLT16_HA:
8094 case R_PPC_GOT16_HA:
8095 case R_PPC_GOT_TLSGD16_HA:
8096 case R_PPC_GOT_TLSLD16_HA:
8097 case R_PPC_GOT_TPREL16_HA:
8098 case R_PPC_GOT_DTPREL16_HA:
8099 /* Add 0x10000 if sign bit in 0:15 is set.
8100 Bits 0:15 are not used. */
8101 addend += 0x8000;
8102 break;
8103 }
8104
8105 #ifdef DEBUG
8106 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8107 "offset = %ld, addend = %ld\n",
8108 howto->name,
8109 (int) r_type,
8110 sym_name,
8111 r_symndx,
8112 (long) rel->r_offset,
8113 (long) addend);
8114 #endif
8115
8116 if (unresolved_reloc
8117 && !((input_section->flags & SEC_DEBUGGING) != 0
8118 && h->def_dynamic))
8119 {
8120 (*_bfd_error_handler)
8121 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
8122 input_bfd,
8123 input_section,
8124 (long) rel->r_offset,
8125 howto->name,
8126 sym_name);
8127 ret = FALSE;
8128 }
8129
8130 r = _bfd_final_link_relocate (howto,
8131 input_bfd,
8132 input_section,
8133 contents,
8134 rel->r_offset,
8135 relocation,
8136 addend);
8137
8138 if (r != bfd_reloc_ok)
8139 {
8140 if (r == bfd_reloc_overflow)
8141 {
8142 if (warned)
8143 continue;
8144 if (h != NULL
8145 && h->root.type == bfd_link_hash_undefweak
8146 && howto->pc_relative)
8147 {
8148 /* Assume this is a call protected by other code that
8149 detect the symbol is undefined. If this is the case,
8150 we can safely ignore the overflow. If not, the
8151 program is hosed anyway, and a little warning isn't
8152 going to help. */
8153
8154 continue;
8155 }
8156
8157 if (! (*info->callbacks->reloc_overflow) (info,
8158 (h ? &h->root : NULL),
8159 sym_name,
8160 howto->name,
8161 rel->r_addend,
8162 input_bfd,
8163 input_section,
8164 rel->r_offset))
8165 return FALSE;
8166 }
8167 else
8168 {
8169 (*_bfd_error_handler)
8170 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
8171 input_bfd, input_section,
8172 (long) rel->r_offset, howto->name, sym_name, (int) r);
8173 ret = FALSE;
8174 }
8175 }
8176 }
8177
8178 #ifdef DEBUG
8179 fprintf (stderr, "\n");
8180 #endif
8181
8182 return ret;
8183 }
8184 \f
8185 /* Finish up dynamic symbol handling. We set the contents of various
8186 dynamic sections here. */
8187
8188 static bfd_boolean
8189 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
8190 struct bfd_link_info *info,
8191 struct elf_link_hash_entry *h,
8192 Elf_Internal_Sym *sym)
8193 {
8194 struct ppc_elf_link_hash_table *htab;
8195 struct plt_entry *ent;
8196 bfd_boolean doneone;
8197
8198 #ifdef DEBUG
8199 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
8200 h->root.root.string);
8201 #endif
8202
8203 htab = ppc_elf_hash_table (info);
8204 BFD_ASSERT (htab->elf.dynobj != NULL);
8205
8206 doneone = FALSE;
8207 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8208 if (ent->plt.offset != (bfd_vma) -1)
8209 {
8210 if (!doneone)
8211 {
8212 Elf_Internal_Rela rela;
8213 bfd_byte *loc;
8214 bfd_vma reloc_index;
8215
8216 if (htab->plt_type == PLT_NEW
8217 || !htab->elf.dynamic_sections_created
8218 || h->dynindx == -1)
8219 reloc_index = ent->plt.offset / 4;
8220 else
8221 {
8222 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
8223 / htab->plt_slot_size);
8224 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8225 && htab->plt_type == PLT_OLD)
8226 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8227 }
8228
8229 /* This symbol has an entry in the procedure linkage table.
8230 Set it up. */
8231 if (htab->plt_type == PLT_VXWORKS
8232 && htab->elf.dynamic_sections_created
8233 && h->dynindx != -1)
8234 {
8235 bfd_vma got_offset;
8236 const bfd_vma *plt_entry;
8237
8238 /* The first three entries in .got.plt are reserved. */
8239 got_offset = (reloc_index + 3) * 4;
8240
8241 /* Use the right PLT. */
8242 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8243 : ppc_elf_vxworks_plt_entry;
8244
8245 /* Fill in the .plt on VxWorks. */
8246 if (info->shared)
8247 {
8248 bfd_put_32 (output_bfd,
8249 plt_entry[0] | PPC_HA (got_offset),
8250 htab->plt->contents + ent->plt.offset + 0);
8251 bfd_put_32 (output_bfd,
8252 plt_entry[1] | PPC_LO (got_offset),
8253 htab->plt->contents + ent->plt.offset + 4);
8254 }
8255 else
8256 {
8257 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8258
8259 bfd_put_32 (output_bfd,
8260 plt_entry[0] | PPC_HA (got_loc),
8261 htab->plt->contents + ent->plt.offset + 0);
8262 bfd_put_32 (output_bfd,
8263 plt_entry[1] | PPC_LO (got_loc),
8264 htab->plt->contents + ent->plt.offset + 4);
8265 }
8266
8267 bfd_put_32 (output_bfd, plt_entry[2],
8268 htab->plt->contents + ent->plt.offset + 8);
8269 bfd_put_32 (output_bfd, plt_entry[3],
8270 htab->plt->contents + ent->plt.offset + 12);
8271
8272 /* This instruction is an immediate load. The value loaded is
8273 the byte offset of the R_PPC_JMP_SLOT relocation from the
8274 start of the .rela.plt section. The value is stored in the
8275 low-order 16 bits of the load instruction. */
8276 /* NOTE: It appears that this is now an index rather than a
8277 prescaled offset. */
8278 bfd_put_32 (output_bfd,
8279 plt_entry[4] | reloc_index,
8280 htab->plt->contents + ent->plt.offset + 16);
8281 /* This instruction is a PC-relative branch whose target is
8282 the start of the PLT section. The address of this branch
8283 instruction is 20 bytes beyond the start of this PLT entry.
8284 The address is encoded in bits 6-29, inclusive. The value
8285 stored is right-shifted by two bits, permitting a 26-bit
8286 offset. */
8287 bfd_put_32 (output_bfd,
8288 (plt_entry[5]
8289 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8290 htab->plt->contents + ent->plt.offset + 20);
8291 bfd_put_32 (output_bfd, plt_entry[6],
8292 htab->plt->contents + ent->plt.offset + 24);
8293 bfd_put_32 (output_bfd, plt_entry[7],
8294 htab->plt->contents + ent->plt.offset + 28);
8295
8296 /* Fill in the GOT entry corresponding to this PLT slot with
8297 the address immediately after the the "bctr" instruction
8298 in this PLT entry. */
8299 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8300 + htab->plt->output_offset
8301 + ent->plt.offset + 16),
8302 htab->sgotplt->contents + got_offset);
8303
8304 if (!info->shared)
8305 {
8306 /* Fill in a couple of entries in .rela.plt.unloaded. */
8307 loc = htab->srelplt2->contents
8308 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8309 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8310 * sizeof (Elf32_External_Rela));
8311
8312 /* Provide the @ha relocation for the first instruction. */
8313 rela.r_offset = (htab->plt->output_section->vma
8314 + htab->plt->output_offset
8315 + ent->plt.offset + 2);
8316 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8317 R_PPC_ADDR16_HA);
8318 rela.r_addend = got_offset;
8319 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8320 loc += sizeof (Elf32_External_Rela);
8321
8322 /* Provide the @l relocation for the second instruction. */
8323 rela.r_offset = (htab->plt->output_section->vma
8324 + htab->plt->output_offset
8325 + ent->plt.offset + 6);
8326 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8327 R_PPC_ADDR16_LO);
8328 rela.r_addend = got_offset;
8329 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8330 loc += sizeof (Elf32_External_Rela);
8331
8332 /* Provide a relocation for the GOT entry corresponding to this
8333 PLT slot. Point it at the middle of the .plt entry. */
8334 rela.r_offset = (htab->sgotplt->output_section->vma
8335 + htab->sgotplt->output_offset
8336 + got_offset);
8337 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8338 R_PPC_ADDR32);
8339 rela.r_addend = ent->plt.offset + 16;
8340 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8341 }
8342
8343 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8344 In particular, the offset for the relocation is not the
8345 address of the PLT entry for this function, as specified
8346 by the ABI. Instead, the offset is set to the address of
8347 the GOT slot for this function. See EABI 4.4.4.1. */
8348 rela.r_offset = (htab->sgotplt->output_section->vma
8349 + htab->sgotplt->output_offset
8350 + got_offset);
8351
8352 }
8353 else
8354 {
8355 asection *splt = htab->plt;
8356 if (!htab->elf.dynamic_sections_created
8357 || h->dynindx == -1)
8358 splt = htab->iplt;
8359
8360 rela.r_offset = (splt->output_section->vma
8361 + splt->output_offset
8362 + ent->plt.offset);
8363 if (htab->plt_type == PLT_OLD
8364 || !htab->elf.dynamic_sections_created
8365 || h->dynindx == -1)
8366 {
8367 /* We don't need to fill in the .plt. The ppc dynamic
8368 linker will fill it in. */
8369 }
8370 else
8371 {
8372 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8373 + htab->glink->output_section->vma
8374 + htab->glink->output_offset);
8375 bfd_put_32 (output_bfd, val,
8376 splt->contents + ent->plt.offset);
8377 }
8378 }
8379
8380 /* Fill in the entry in the .rela.plt section. */
8381 rela.r_addend = 0;
8382 if (!htab->elf.dynamic_sections_created
8383 || h->dynindx == -1)
8384 {
8385 BFD_ASSERT (h->type == STT_GNU_IFUNC
8386 && h->def_regular
8387 && (h->root.type == bfd_link_hash_defined
8388 || h->root.type == bfd_link_hash_defweak));
8389 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8390 rela.r_addend = SYM_VAL (h);
8391 }
8392 else
8393 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8394
8395 if (!htab->elf.dynamic_sections_created
8396 || h->dynindx == -1)
8397 loc = (htab->reliplt->contents
8398 + (htab->reliplt->reloc_count++
8399 * sizeof (Elf32_External_Rela)));
8400 else
8401 loc = (htab->relplt->contents
8402 + reloc_index * sizeof (Elf32_External_Rela));
8403 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8404
8405 if (!h->def_regular)
8406 {
8407 /* Mark the symbol as undefined, rather than as
8408 defined in the .plt section. Leave the value if
8409 there were any relocations where pointer equality
8410 matters (this is a clue for the dynamic linker, to
8411 make function pointer comparisons work between an
8412 application and shared library), otherwise set it
8413 to zero. */
8414 sym->st_shndx = SHN_UNDEF;
8415 if (!h->pointer_equality_needed)
8416 sym->st_value = 0;
8417 else if (!h->ref_regular_nonweak)
8418 {
8419 /* This breaks function pointer comparisons, but
8420 that is better than breaking tests for a NULL
8421 function pointer. */
8422 sym->st_value = 0;
8423 }
8424 }
8425 else if (h->type == STT_GNU_IFUNC
8426 && !info->shared)
8427 {
8428 /* Set the value of ifunc symbols in a non-pie
8429 executable to the glink entry. This is to avoid
8430 text relocations. We can't do this for ifunc in
8431 allocate_dynrelocs, as we do for normal dynamic
8432 function symbols with plt entries, because we need
8433 to keep the original value around for the ifunc
8434 relocation. */
8435 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8436 (output_bfd, htab->glink->output_section));
8437 sym->st_value = (ent->glink_offset
8438 + htab->glink->output_offset
8439 + htab->glink->output_section->vma);
8440 }
8441 doneone = TRUE;
8442 }
8443
8444 if (htab->plt_type == PLT_NEW
8445 || !htab->elf.dynamic_sections_created
8446 || h->dynindx == -1)
8447 {
8448 unsigned char *p;
8449 asection *splt = htab->plt;
8450 if (!htab->elf.dynamic_sections_created
8451 || h->dynindx == -1)
8452 splt = htab->iplt;
8453
8454 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
8455
8456 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
8457 {
8458 bfd_put_32 (output_bfd, LWZ_11_3, p);
8459 p += 4;
8460 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
8461 p += 4;
8462 bfd_put_32 (output_bfd, MR_0_3, p);
8463 p += 4;
8464 bfd_put_32 (output_bfd, CMPWI_11_0, p);
8465 p += 4;
8466 bfd_put_32 (output_bfd, ADD_3_12_2, p);
8467 p += 4;
8468 bfd_put_32 (output_bfd, BEQLR, p);
8469 p += 4;
8470 bfd_put_32 (output_bfd, MR_3_0, p);
8471 p += 4;
8472 bfd_put_32 (output_bfd, NOP, p);
8473 p += 4;
8474 }
8475
8476 write_glink_stub (ent, splt, p, info);
8477
8478 if (!info->shared)
8479 /* We only need one non-PIC glink stub. */
8480 break;
8481 }
8482 else
8483 break;
8484 }
8485
8486 if (h->needs_copy)
8487 {
8488 asection *s;
8489 Elf_Internal_Rela rela;
8490 bfd_byte *loc;
8491
8492 /* This symbols needs a copy reloc. Set it up. */
8493
8494 #ifdef DEBUG
8495 fprintf (stderr, ", copy");
8496 #endif
8497
8498 BFD_ASSERT (h->dynindx != -1);
8499
8500 if (ppc_elf_hash_entry (h)->has_sda_refs)
8501 s = htab->relsbss;
8502 else
8503 s = htab->relbss;
8504 BFD_ASSERT (s != NULL);
8505
8506 rela.r_offset = SYM_VAL (h);
8507 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8508 rela.r_addend = 0;
8509 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8510 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8511 }
8512
8513 #ifdef DEBUG
8514 fprintf (stderr, "\n");
8515 #endif
8516
8517 /* Mark some specially defined symbols as absolute. */
8518 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8519 || (!htab->is_vxworks
8520 && (h == htab->elf.hgot
8521 || strcmp (h->root.root.string,
8522 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8523 sym->st_shndx = SHN_ABS;
8524
8525 return TRUE;
8526 }
8527 \f
8528 static enum elf_reloc_type_class
8529 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8530 {
8531 switch (ELF32_R_TYPE (rela->r_info))
8532 {
8533 case R_PPC_RELATIVE:
8534 return reloc_class_relative;
8535 case R_PPC_REL24:
8536 case R_PPC_ADDR24:
8537 case R_PPC_JMP_SLOT:
8538 return reloc_class_plt;
8539 case R_PPC_COPY:
8540 return reloc_class_copy;
8541 default:
8542 return reloc_class_normal;
8543 }
8544 }
8545 \f
8546 /* Finish up the dynamic sections. */
8547
8548 static bfd_boolean
8549 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8550 struct bfd_link_info *info)
8551 {
8552 asection *sdyn;
8553 asection *splt;
8554 struct ppc_elf_link_hash_table *htab;
8555 bfd_vma got;
8556 bfd *dynobj;
8557 bfd_boolean ret = TRUE;
8558
8559 #ifdef DEBUG
8560 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8561 #endif
8562
8563 htab = ppc_elf_hash_table (info);
8564 dynobj = elf_hash_table (info)->dynobj;
8565 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8566 if (htab->is_vxworks)
8567 splt = bfd_get_section_by_name (dynobj, ".plt");
8568 else
8569 splt = NULL;
8570
8571 got = 0;
8572 if (htab->elf.hgot != NULL)
8573 got = SYM_VAL (htab->elf.hgot);
8574
8575 if (htab->elf.dynamic_sections_created)
8576 {
8577 Elf32_External_Dyn *dyncon, *dynconend;
8578
8579 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8580
8581 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8582 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8583 for (; dyncon < dynconend; dyncon++)
8584 {
8585 Elf_Internal_Dyn dyn;
8586 asection *s;
8587
8588 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8589
8590 switch (dyn.d_tag)
8591 {
8592 case DT_PLTGOT:
8593 if (htab->is_vxworks)
8594 s = htab->sgotplt;
8595 else
8596 s = htab->plt;
8597 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8598 break;
8599
8600 case DT_PLTRELSZ:
8601 dyn.d_un.d_val = htab->relplt->size;
8602 break;
8603
8604 case DT_JMPREL:
8605 s = htab->relplt;
8606 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8607 break;
8608
8609 case DT_PPC_GOT:
8610 dyn.d_un.d_ptr = got;
8611 break;
8612
8613 case DT_RELASZ:
8614 if (htab->is_vxworks)
8615 {
8616 if (htab->relplt)
8617 dyn.d_un.d_ptr -= htab->relplt->size;
8618 break;
8619 }
8620 continue;
8621
8622 default:
8623 if (htab->is_vxworks
8624 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8625 break;
8626 continue;
8627 }
8628
8629 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8630 }
8631 }
8632
8633 if (htab->got != NULL)
8634 {
8635 if (htab->elf.hgot->root.u.def.section == htab->got
8636 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8637 {
8638 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8639
8640 p += htab->elf.hgot->root.u.def.value;
8641 if (htab->plt_type == PLT_OLD)
8642 {
8643 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8644 so that a function can easily find the address of
8645 _GLOBAL_OFFSET_TABLE_. */
8646 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8647 < htab->elf.hgot->root.u.def.section->size);
8648 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8649 }
8650
8651 if (sdyn != NULL)
8652 {
8653 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8654 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8655 < htab->elf.hgot->root.u.def.section->size);
8656 bfd_put_32 (output_bfd, val, p);
8657 }
8658 }
8659 else
8660 {
8661 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
8662 htab->elf.hgot->root.root.string,
8663 (htab->sgotplt != NULL
8664 ? htab->sgotplt->name : htab->got->name));
8665 bfd_set_error (bfd_error_bad_value);
8666 ret = FALSE;
8667 }
8668
8669 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8670 }
8671
8672 /* Fill in the first entry in the VxWorks procedure linkage table. */
8673 if (splt && splt->size > 0)
8674 {
8675 /* Use the right PLT. */
8676 const bfd_vma *plt_entry = (info->shared
8677 ? ppc_elf_vxworks_pic_plt0_entry
8678 : ppc_elf_vxworks_plt0_entry);
8679
8680 if (!info->shared)
8681 {
8682 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8683
8684 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8685 splt->contents + 0);
8686 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8687 splt->contents + 4);
8688 }
8689 else
8690 {
8691 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8692 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8693 }
8694 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8695 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8696 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8697 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8698 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8699 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8700
8701 if (! info->shared)
8702 {
8703 Elf_Internal_Rela rela;
8704 bfd_byte *loc;
8705
8706 loc = htab->srelplt2->contents;
8707
8708 /* Output the @ha relocation for the first instruction. */
8709 rela.r_offset = (htab->plt->output_section->vma
8710 + htab->plt->output_offset
8711 + 2);
8712 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8713 rela.r_addend = 0;
8714 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8715 loc += sizeof (Elf32_External_Rela);
8716
8717 /* Output the @l relocation for the second instruction. */
8718 rela.r_offset = (htab->plt->output_section->vma
8719 + htab->plt->output_offset
8720 + 6);
8721 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8722 rela.r_addend = 0;
8723 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8724 loc += sizeof (Elf32_External_Rela);
8725
8726 /* Fix up the remaining relocations. They may have the wrong
8727 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8728 in which symbols were output. */
8729 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8730 {
8731 Elf_Internal_Rela rel;
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_HA);
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.hgot->indx, R_PPC_ADDR16_LO);
8740 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8741 loc += sizeof (Elf32_External_Rela);
8742
8743 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8744 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8745 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8746 loc += sizeof (Elf32_External_Rela);
8747 }
8748 }
8749 }
8750
8751 if (htab->glink != NULL
8752 && htab->glink->contents != NULL
8753 && htab->elf.dynamic_sections_created)
8754 {
8755 unsigned char *p;
8756 unsigned char *endp;
8757 bfd_vma res0;
8758 unsigned int i;
8759
8760 /*
8761 * PIC glink code is the following:
8762 *
8763 * # ith PLT code stub.
8764 * addis 11,30,(plt+(i-1)*4-got)@ha
8765 * lwz 11,(plt+(i-1)*4-got)@l(11)
8766 * mtctr 11
8767 * bctr
8768 *
8769 * # A table of branches, one for each plt entry.
8770 * # The idea is that the plt call stub loads ctr and r11 with these
8771 * # addresses, so (r11 - res_0) gives the plt index * 4.
8772 * res_0: b PLTresolve
8773 * res_1: b PLTresolve
8774 * .
8775 * # Some number of entries towards the end can be nops
8776 * res_n_m3: nop
8777 * res_n_m2: nop
8778 * res_n_m1:
8779 *
8780 * PLTresolve:
8781 * addis 11,11,(1f-res_0)@ha
8782 * mflr 0
8783 * bcl 20,31,1f
8784 * 1: addi 11,11,(1b-res_0)@l
8785 * mflr 12
8786 * mtlr 0
8787 * sub 11,11,12 # r11 = index * 4
8788 * addis 12,12,(got+4-1b)@ha
8789 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8790 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8791 * mtctr 0
8792 * add 0,11,11
8793 * add 11,0,11 # r11 = index * 12 = reloc offset.
8794 * bctr
8795 */
8796 static const unsigned int pic_plt_resolve[] =
8797 {
8798 ADDIS_11_11,
8799 MFLR_0,
8800 BCL_20_31,
8801 ADDI_11_11,
8802 MFLR_12,
8803 MTLR_0,
8804 SUB_11_11_12,
8805 ADDIS_12_12,
8806 LWZ_0_12,
8807 LWZ_12_12,
8808 MTCTR_0,
8809 ADD_0_11_11,
8810 ADD_11_0_11,
8811 BCTR,
8812 NOP,
8813 NOP
8814 };
8815
8816 /*
8817 * Non-PIC glink code is a little simpler.
8818 *
8819 * # ith PLT code stub.
8820 * lis 11,(plt+(i-1)*4)@ha
8821 * lwz 11,(plt+(i-1)*4)@l(11)
8822 * mtctr 11
8823 * bctr
8824 *
8825 * The branch table is the same, then comes
8826 *
8827 * PLTresolve:
8828 * lis 12,(got+4)@ha
8829 * addis 11,11,(-res_0)@ha
8830 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8831 * addi 11,11,(-res_0)@l # r11 = index * 4
8832 * mtctr 0
8833 * add 0,11,11
8834 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8835 * add 11,0,11 # r11 = index * 12 = reloc offset.
8836 * bctr
8837 */
8838 static const unsigned int plt_resolve[] =
8839 {
8840 LIS_12,
8841 ADDIS_11_11,
8842 LWZ_0_12,
8843 ADDI_11_11,
8844 MTCTR_0,
8845 ADD_0_11_11,
8846 LWZ_12_12,
8847 ADD_11_0_11,
8848 BCTR,
8849 NOP,
8850 NOP,
8851 NOP,
8852 NOP,
8853 NOP,
8854 NOP,
8855 NOP
8856 };
8857
8858 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8859 abort ();
8860 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8861 abort ();
8862
8863 /* Build the branch table, one for each plt entry (less one),
8864 and perhaps some padding. */
8865 p = htab->glink->contents;
8866 p += htab->glink_pltresolve;
8867 endp = htab->glink->contents;
8868 endp += htab->glink->size - GLINK_PLTRESOLVE;
8869 while (p < endp - 8 * 4)
8870 {
8871 bfd_put_32 (output_bfd, B + endp - p, p);
8872 p += 4;
8873 }
8874 while (p < endp)
8875 {
8876 bfd_put_32 (output_bfd, NOP, p);
8877 p += 4;
8878 }
8879
8880 res0 = (htab->glink_pltresolve
8881 + htab->glink->output_section->vma
8882 + htab->glink->output_offset);
8883
8884 /* Last comes the PLTresolve stub. */
8885 if (info->shared)
8886 {
8887 bfd_vma bcl;
8888
8889 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8890 {
8891 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8892 p += 4;
8893 }
8894 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8895
8896 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8897 + htab->glink->output_section->vma
8898 + htab->glink->output_offset);
8899
8900 bfd_put_32 (output_bfd,
8901 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8902 bfd_put_32 (output_bfd,
8903 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8904 bfd_put_32 (output_bfd,
8905 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8906 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8907 {
8908 bfd_put_32 (output_bfd,
8909 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8910 bfd_put_32 (output_bfd,
8911 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8912 }
8913 else
8914 {
8915 bfd_put_32 (output_bfd,
8916 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8917 bfd_put_32 (output_bfd,
8918 LWZ_12_12 + 4, p + 9*4);
8919 }
8920 }
8921 else
8922 {
8923 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8924 {
8925 bfd_put_32 (output_bfd, plt_resolve[i], p);
8926 p += 4;
8927 }
8928 p -= 4 * ARRAY_SIZE (plt_resolve);
8929
8930 bfd_put_32 (output_bfd,
8931 LIS_12 + PPC_HA (got + 4), p + 0*4);
8932 bfd_put_32 (output_bfd,
8933 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8934 bfd_put_32 (output_bfd,
8935 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8936 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8937 {
8938 bfd_put_32 (output_bfd,
8939 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8940 bfd_put_32 (output_bfd,
8941 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8942 }
8943 else
8944 {
8945 bfd_put_32 (output_bfd,
8946 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8947 bfd_put_32 (output_bfd,
8948 LWZ_12_12 + 4, p + 6*4);
8949 }
8950 }
8951 }
8952
8953 return ret;
8954 }
8955 \f
8956 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8957 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8958 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8959 #define TARGET_BIG_NAME "elf32-powerpc"
8960 #define ELF_ARCH bfd_arch_powerpc
8961 #define ELF_TARGET_ID PPC32_ELF_DATA
8962 #define ELF_MACHINE_CODE EM_PPC
8963 #ifdef __QNXTARGET__
8964 #define ELF_MAXPAGESIZE 0x1000
8965 #else
8966 #define ELF_MAXPAGESIZE 0x10000
8967 #endif
8968 #define ELF_MINPAGESIZE 0x1000
8969 #define ELF_COMMONPAGESIZE 0x1000
8970 #define elf_info_to_howto ppc_elf_info_to_howto
8971
8972 #ifdef EM_CYGNUS_POWERPC
8973 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8974 #endif
8975
8976 #ifdef EM_PPC_OLD
8977 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8978 #endif
8979
8980 #define elf_backend_plt_not_loaded 1
8981 #define elf_backend_can_gc_sections 1
8982 #define elf_backend_can_refcount 1
8983 #define elf_backend_rela_normal 1
8984
8985 #define bfd_elf32_mkobject ppc_elf_mkobject
8986 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8987 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8988 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8989 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8990 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8991 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8992 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8993
8994 #define elf_backend_object_p ppc_elf_object_p
8995 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8996 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8997 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8998 #define elf_backend_relocate_section ppc_elf_relocate_section
8999 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
9000 #define elf_backend_check_relocs ppc_elf_check_relocs
9001 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
9002 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
9003 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
9004 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
9005 #define elf_backend_hash_symbol ppc_elf_hash_symbol
9006 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
9007 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
9008 #define elf_backend_fake_sections ppc_elf_fake_sections
9009 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
9010 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
9011 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
9012 #define elf_backend_write_core_note ppc_elf_write_core_note
9013 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
9014 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
9015 #define elf_backend_final_write_processing ppc_elf_final_write_processing
9016 #define elf_backend_write_section ppc_elf_write_section
9017 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
9018 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
9019 #define elf_backend_action_discarded ppc_elf_action_discarded
9020 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
9021 #define elf_backend_post_process_headers _bfd_elf_set_osabi
9022
9023 #include "elf32-target.h"
9024
9025 /* VxWorks Target */
9026
9027 #undef TARGET_LITTLE_SYM
9028 #undef TARGET_LITTLE_NAME
9029
9030 #undef TARGET_BIG_SYM
9031 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
9032 #undef TARGET_BIG_NAME
9033 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
9034
9035 /* VxWorks uses the elf default section flags for .plt. */
9036 static const struct bfd_elf_special_section *
9037 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9038 {
9039 if (sec->name == NULL)
9040 return NULL;
9041
9042 if (strcmp (sec->name, ".plt") == 0)
9043 return _bfd_elf_get_sec_type_attr (abfd, sec);
9044
9045 return ppc_elf_get_sec_type_attr (abfd, sec);
9046 }
9047
9048 /* Like ppc_elf_link_hash_table_create, but overrides
9049 appropriately for VxWorks. */
9050 static struct bfd_link_hash_table *
9051 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9052 {
9053 struct bfd_link_hash_table *ret;
9054
9055 ret = ppc_elf_link_hash_table_create (abfd);
9056 if (ret)
9057 {
9058 struct ppc_elf_link_hash_table *htab
9059 = (struct ppc_elf_link_hash_table *)ret;
9060 htab->is_vxworks = 1;
9061 htab->plt_type = PLT_VXWORKS;
9062 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
9063 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
9064 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
9065 }
9066 return ret;
9067 }
9068
9069 /* Tweak magic VxWorks symbols as they are loaded. */
9070 static bfd_boolean
9071 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
9072 struct bfd_link_info *info,
9073 Elf_Internal_Sym *sym,
9074 const char **namep ATTRIBUTE_UNUSED,
9075 flagword *flagsp ATTRIBUTE_UNUSED,
9076 asection **secp,
9077 bfd_vma *valp)
9078 {
9079 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
9080 valp))
9081 return FALSE;
9082
9083 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
9084 }
9085
9086 static void
9087 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
9088 {
9089 ppc_elf_final_write_processing(abfd, linker);
9090 elf_vxworks_final_write_processing(abfd, linker);
9091 }
9092
9093 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
9094 define it. */
9095 #undef elf_backend_want_plt_sym
9096 #define elf_backend_want_plt_sym 1
9097 #undef elf_backend_want_got_plt
9098 #define elf_backend_want_got_plt 1
9099 #undef elf_backend_got_symbol_offset
9100 #define elf_backend_got_symbol_offset 0
9101 #undef elf_backend_plt_not_loaded
9102 #define elf_backend_plt_not_loaded 0
9103 #undef elf_backend_plt_readonly
9104 #define elf_backend_plt_readonly 1
9105 #undef elf_backend_got_header_size
9106 #define elf_backend_got_header_size 12
9107
9108 #undef bfd_elf32_get_synthetic_symtab
9109
9110 #undef bfd_elf32_bfd_link_hash_table_create
9111 #define bfd_elf32_bfd_link_hash_table_create \
9112 ppc_elf_vxworks_link_hash_table_create
9113 #undef elf_backend_add_symbol_hook
9114 #define elf_backend_add_symbol_hook \
9115 ppc_elf_vxworks_add_symbol_hook
9116 #undef elf_backend_link_output_symbol_hook
9117 #define elf_backend_link_output_symbol_hook \
9118 elf_vxworks_link_output_symbol_hook
9119 #undef elf_backend_final_write_processing
9120 #define elf_backend_final_write_processing \
9121 ppc_elf_vxworks_final_write_processing
9122 #undef elf_backend_get_sec_type_attr
9123 #define elf_backend_get_sec_type_attr \
9124 ppc_elf_vxworks_get_sec_type_attr
9125 #undef elf_backend_emit_relocs
9126 #define elf_backend_emit_relocs \
9127 elf_vxworks_emit_relocs
9128
9129 #undef elf32_bed
9130 #define elf32_bed ppc_elf_vxworks_bed
9131 #undef elf_backend_post_process_headers
9132
9133 #include "elf32-target.h"
GDB Binutils - Deliverables
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