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Fix spelling mistakes.
[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, 2011
4 Free Software Foundation, Inc.
5 Written by Ian Lance Taylor, Cygnus Support.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the
21 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
22 Boston, MA 02110-1301, USA. */
23
24
25 /* This file is based on a preliminary PowerPC ELF ABI. The
26 information may not match the final PowerPC ELF ABI. It includes
27 suggestions from the in-progress Embedded PowerPC ABI, and that
28 information may also not match. */
29
30 #include "sysdep.h"
31 #include <stdarg.h>
32 #include "bfd.h"
33 #include "bfdlink.h"
34 #include "libbfd.h"
35 #include "elf-bfd.h"
36 #include "elf/ppc.h"
37 #include "elf32-ppc.h"
38 #include "elf-vxworks.h"
39
40 /* RELA relocations are used here. */
41
42 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44 static bfd_reloc_status_type ppc_elf_unhandled_reloc
45 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
46
47 /* Branch prediction bit for branch taken relocs. */
48 #define BRANCH_PREDICT_BIT 0x200000
49 /* Mask to set RA in memory instructions. */
50 #define RA_REGISTER_MASK 0x001f0000
51 /* Value to shift register by to insert RA. */
52 #define RA_REGISTER_SHIFT 16
53
54 /* The name of the dynamic interpreter. This is put in the .interp
55 section. */
56 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
57
58 /* For old-style PLT. */
59 /* The number of single-slot PLT entries (the rest use two slots). */
60 #define PLT_NUM_SINGLE_ENTRIES 8192
61
62 /* For new-style .glink and .plt. */
63 #define GLINK_PLTRESOLVE 16*4
64 #define GLINK_ENTRY_SIZE 4*4
65 #define TLS_GET_ADDR_GLINK_SIZE 12*4
66
67 /* VxWorks uses its own plt layout, filled in by the static linker. */
68
69 /* The standard VxWorks PLT entry. */
70 #define VXWORKS_PLT_ENTRY_SIZE 32
71 static const bfd_vma ppc_elf_vxworks_plt_entry
72 [VXWORKS_PLT_ENTRY_SIZE / 4] =
73 {
74 0x3d800000, /* lis r12,0 */
75 0x818c0000, /* lwz r12,0(r12) */
76 0x7d8903a6, /* mtctr r12 */
77 0x4e800420, /* bctr */
78 0x39600000, /* li r11,0 */
79 0x48000000, /* b 14 <.PLT0resolve+0x4> */
80 0x60000000, /* nop */
81 0x60000000, /* nop */
82 };
83 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
84 [VXWORKS_PLT_ENTRY_SIZE / 4] =
85 {
86 0x3d9e0000, /* addis r12,r30,0 */
87 0x818c0000, /* lwz r12,0(r12) */
88 0x7d8903a6, /* mtctr r12 */
89 0x4e800420, /* bctr */
90 0x39600000, /* li r11,0 */
91 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
92 0x60000000, /* nop */
93 0x60000000, /* nop */
94 };
95
96 /* The initial VxWorks PLT entry. */
97 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
98 static const bfd_vma ppc_elf_vxworks_plt0_entry
99 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
100 {
101 0x3d800000, /* lis r12,0 */
102 0x398c0000, /* addi r12,r12,0 */
103 0x800c0008, /* lwz r0,8(r12) */
104 0x7c0903a6, /* mtctr r0 */
105 0x818c0004, /* lwz r12,4(r12) */
106 0x4e800420, /* bctr */
107 0x60000000, /* nop */
108 0x60000000, /* nop */
109 };
110 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
111 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
112 {
113 0x819e0008, /* lwz r12,8(r30) */
114 0x7d8903a6, /* mtctr r12 */
115 0x819e0004, /* lwz r12,4(r30) */
116 0x4e800420, /* bctr */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 0x60000000, /* nop */
120 0x60000000, /* nop */
121 };
122
123 /* For executables, we have some additional relocations in
124 .rela.plt.unloaded, for the kernel loader. */
125
126 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
127 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
128 /* The number of relocations in the PLTResolve slot. */
129 #define VXWORKS_PLTRESOLVE_RELOCS 2
130 /* The number of relocations in the PLTResolve slot when when creating
131 a shared library. */
132 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
133
134 /* Some instructions. */
135 #define ADDIS_11_11 0x3d6b0000
136 #define ADDIS_11_30 0x3d7e0000
137 #define ADDIS_12_12 0x3d8c0000
138 #define ADDI_11_11 0x396b0000
139 #define ADD_0_11_11 0x7c0b5a14
140 #define ADD_3_12_2 0x7c6c1214
141 #define ADD_11_0_11 0x7d605a14
142 #define B 0x48000000
143 #define BCL_20_31 0x429f0005
144 #define BCTR 0x4e800420
145 #define BEQLR 0x4d820020
146 #define CMPWI_11_0 0x2c0b0000
147 #define LIS_11 0x3d600000
148 #define LIS_12 0x3d800000
149 #define LWZU_0_12 0x840c0000
150 #define LWZ_0_12 0x800c0000
151 #define LWZ_11_3 0x81630000
152 #define LWZ_11_11 0x816b0000
153 #define LWZ_11_30 0x817e0000
154 #define LWZ_12_3 0x81830000
155 #define LWZ_12_12 0x818c0000
156 #define MR_0_3 0x7c601b78
157 #define MR_3_0 0x7c030378
158 #define MFLR_0 0x7c0802a6
159 #define MFLR_12 0x7d8802a6
160 #define MTCTR_0 0x7c0903a6
161 #define MTCTR_11 0x7d6903a6
162 #define MTLR_0 0x7c0803a6
163 #define NOP 0x60000000
164 #define SUB_11_11_12 0x7d6c5850
165
166 /* Offset of tp and dtp pointers from start of TLS block. */
167 #define TP_OFFSET 0x7000
168 #define DTP_OFFSET 0x8000
169
170 /* The value of a defined global symbol. */
171 #define SYM_VAL(SYM) \
172 ((SYM)->root.u.def.section->output_section->vma \
173 + (SYM)->root.u.def.section->output_offset \
174 + (SYM)->root.u.def.value)
175 \f
176 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
177
178 static reloc_howto_type ppc_elf_howto_raw[] = {
179 /* This reloc does nothing. */
180 HOWTO (R_PPC_NONE, /* type */
181 0, /* rightshift */
182 2, /* size (0 = byte, 1 = short, 2 = long) */
183 32, /* bitsize */
184 FALSE, /* pc_relative */
185 0, /* bitpos */
186 complain_overflow_bitfield, /* complain_on_overflow */
187 bfd_elf_generic_reloc, /* special_function */
188 "R_PPC_NONE", /* name */
189 FALSE, /* partial_inplace */
190 0, /* src_mask */
191 0, /* dst_mask */
192 FALSE), /* pcrel_offset */
193
194 /* A standard 32 bit relocation. */
195 HOWTO (R_PPC_ADDR32, /* type */
196 0, /* rightshift */
197 2, /* size (0 = byte, 1 = short, 2 = long) */
198 32, /* bitsize */
199 FALSE, /* pc_relative */
200 0, /* bitpos */
201 complain_overflow_bitfield, /* complain_on_overflow */
202 bfd_elf_generic_reloc, /* special_function */
203 "R_PPC_ADDR32", /* name */
204 FALSE, /* partial_inplace */
205 0, /* src_mask */
206 0xffffffff, /* dst_mask */
207 FALSE), /* pcrel_offset */
208
209 /* An absolute 26 bit branch; the lower two bits must be zero.
210 FIXME: we don't check that, we just clear them. */
211 HOWTO (R_PPC_ADDR24, /* type */
212 0, /* rightshift */
213 2, /* size (0 = byte, 1 = short, 2 = long) */
214 26, /* bitsize */
215 FALSE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_bitfield, /* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_PPC_ADDR24", /* name */
220 FALSE, /* partial_inplace */
221 0, /* src_mask */
222 0x3fffffc, /* dst_mask */
223 FALSE), /* pcrel_offset */
224
225 /* A standard 16 bit relocation. */
226 HOWTO (R_PPC_ADDR16, /* type */
227 0, /* rightshift */
228 1, /* size (0 = byte, 1 = short, 2 = long) */
229 16, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_bitfield, /* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_PPC_ADDR16", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0xffff, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* A 16 bit relocation without overflow. */
241 HOWTO (R_PPC_ADDR16_LO, /* type */
242 0, /* rightshift */
243 1, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_dont,/* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC_ADDR16_LO", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0xffff, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* The high order 16 bits of an address. */
256 HOWTO (R_PPC_ADDR16_HI, /* type */
257 16, /* rightshift */
258 1, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 0, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 bfd_elf_generic_reloc, /* special_function */
264 "R_PPC_ADDR16_HI", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0xffff, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* The high order 16 bits of an address, plus 1 if the contents of
271 the low 16 bits, treated as a signed number, is negative. */
272 HOWTO (R_PPC_ADDR16_HA, /* type */
273 16, /* rightshift */
274 1, /* size (0 = byte, 1 = short, 2 = long) */
275 16, /* bitsize */
276 FALSE, /* pc_relative */
277 0, /* bitpos */
278 complain_overflow_dont, /* complain_on_overflow */
279 ppc_elf_addr16_ha_reloc, /* special_function */
280 "R_PPC_ADDR16_HA", /* name */
281 FALSE, /* partial_inplace */
282 0, /* src_mask */
283 0xffff, /* dst_mask */
284 FALSE), /* pcrel_offset */
285
286 /* An absolute 16 bit branch; the lower two bits must be zero.
287 FIXME: we don't check that, we just clear them. */
288 HOWTO (R_PPC_ADDR14, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14", /* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is expected to be taken. The lower two
304 bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* An absolute 16 bit branch, for which bit 10 should be set to
320 indicate that the branch is not expected to be taken. The lower
321 two bits must be zero. */
322 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 16, /* bitsize */
326 FALSE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC_ADDR14_BRNTAKEN",/* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0xfffc, /* dst_mask */
334 FALSE), /* pcrel_offset */
335
336 /* A relative 26 bit branch; the lower two bits must be zero. */
337 HOWTO (R_PPC_REL24, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 26, /* bitsize */
341 TRUE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_signed, /* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_PPC_REL24", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0x3fffffc, /* dst_mask */
349 TRUE), /* pcrel_offset */
350
351 /* A relative 16 bit branch; the lower two bits must be zero. */
352 HOWTO (R_PPC_REL14, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is expected to be taken. The lower two bits must be
368 zero. */
369 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRTAKEN", /* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* A relative 16 bit branch. Bit 10 should be set to indicate that
384 the branch is not expected to be taken. The lower two bits must
385 be zero. */
386 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
387 0, /* rightshift */
388 2, /* size (0 = byte, 1 = short, 2 = long) */
389 16, /* bitsize */
390 TRUE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_signed, /* complain_on_overflow */
393 bfd_elf_generic_reloc, /* special_function */
394 "R_PPC_REL14_BRNTAKEN",/* name */
395 FALSE, /* partial_inplace */
396 0, /* src_mask */
397 0xfffc, /* dst_mask */
398 TRUE), /* pcrel_offset */
399
400 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
401 symbol. */
402 HOWTO (R_PPC_GOT16, /* type */
403 0, /* rightshift */
404 1, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
406 FALSE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_signed, /* complain_on_overflow */
409 bfd_elf_generic_reloc, /* special_function */
410 "R_PPC_GOT16", /* name */
411 FALSE, /* partial_inplace */
412 0, /* src_mask */
413 0xffff, /* dst_mask */
414 FALSE), /* pcrel_offset */
415
416 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
417 the symbol. */
418 HOWTO (R_PPC_GOT16_LO, /* type */
419 0, /* rightshift */
420 1, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 FALSE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_dont, /* complain_on_overflow */
425 bfd_elf_generic_reloc, /* special_function */
426 "R_PPC_GOT16_LO", /* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0xffff, /* dst_mask */
430 FALSE), /* pcrel_offset */
431
432 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
433 the symbol. */
434 HOWTO (R_PPC_GOT16_HI, /* type */
435 16, /* rightshift */
436 1, /* size (0 = byte, 1 = short, 2 = long) */
437 16, /* bitsize */
438 FALSE, /* pc_relative */
439 0, /* bitpos */
440 complain_overflow_bitfield, /* complain_on_overflow */
441 bfd_elf_generic_reloc, /* special_function */
442 "R_PPC_GOT16_HI", /* name */
443 FALSE, /* partial_inplace */
444 0, /* src_mask */
445 0xffff, /* dst_mask */
446 FALSE), /* pcrel_offset */
447
448 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
449 the symbol. */
450 HOWTO (R_PPC_GOT16_HA, /* type */
451 16, /* rightshift */
452 1, /* size (0 = byte, 1 = short, 2 = long) */
453 16, /* bitsize */
454 FALSE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_bitfield, /* complain_on_overflow */
457 ppc_elf_addr16_ha_reloc, /* special_function */
458 "R_PPC_GOT16_HA", /* name */
459 FALSE, /* partial_inplace */
460 0, /* src_mask */
461 0xffff, /* dst_mask */
462 FALSE), /* pcrel_offset */
463
464 /* Like R_PPC_REL24, but referring to the procedure linkage table
465 entry for the symbol. */
466 HOWTO (R_PPC_PLTREL24, /* type */
467 0, /* rightshift */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
469 26, /* bitsize */
470 TRUE, /* pc_relative */
471 0, /* bitpos */
472 complain_overflow_signed, /* complain_on_overflow */
473 bfd_elf_generic_reloc, /* special_function */
474 "R_PPC_PLTREL24", /* name */
475 FALSE, /* partial_inplace */
476 0, /* src_mask */
477 0x3fffffc, /* dst_mask */
478 TRUE), /* pcrel_offset */
479
480 /* This is used only by the dynamic linker. The symbol should exist
481 both in the object being run and in some shared library. The
482 dynamic linker copies the data addressed by the symbol from the
483 shared library into the object, because the object being
484 run has to have the data at some particular address. */
485 HOWTO (R_PPC_COPY, /* type */
486 0, /* rightshift */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
488 32, /* bitsize */
489 FALSE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_bitfield, /* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_PPC_COPY", /* name */
494 FALSE, /* partial_inplace */
495 0, /* src_mask */
496 0, /* dst_mask */
497 FALSE), /* pcrel_offset */
498
499 /* Like R_PPC_ADDR32, but used when setting global offset table
500 entries. */
501 HOWTO (R_PPC_GLOB_DAT, /* type */
502 0, /* rightshift */
503 2, /* size (0 = byte, 1 = short, 2 = long) */
504 32, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_bitfield, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_PPC_GLOB_DAT", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0xffffffff, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Marks a procedure linkage table entry for a symbol. */
516 HOWTO (R_PPC_JMP_SLOT, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_JMP_SLOT", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Used only by the dynamic linker. When the object is run, this
531 longword is set to the load address of the object, plus the
532 addend. */
533 HOWTO (R_PPC_RELATIVE, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 32, /* bitsize */
537 FALSE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_bitfield, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_RELATIVE", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0xffffffff, /* dst_mask */
545 FALSE), /* pcrel_offset */
546
547 /* Like R_PPC_REL24, but uses the value of the symbol within the
548 object rather than the final value. Normally used for
549 _GLOBAL_OFFSET_TABLE_. */
550 HOWTO (R_PPC_LOCAL24PC, /* type */
551 0, /* rightshift */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
553 26, /* bitsize */
554 TRUE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_signed, /* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_PPC_LOCAL24PC", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 0x3fffffc, /* dst_mask */
562 TRUE), /* pcrel_offset */
563
564 /* Like R_PPC_ADDR32, but may be unaligned. */
565 HOWTO (R_PPC_UADDR32, /* type */
566 0, /* rightshift */
567 2, /* size (0 = byte, 1 = short, 2 = long) */
568 32, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_bitfield, /* complain_on_overflow */
572 bfd_elf_generic_reloc, /* special_function */
573 "R_PPC_UADDR32", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0xffffffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* Like R_PPC_ADDR16, but may be unaligned. */
580 HOWTO (R_PPC_UADDR16, /* type */
581 0, /* rightshift */
582 1, /* size (0 = byte, 1 = short, 2 = long) */
583 16, /* bitsize */
584 FALSE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_bitfield, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 "R_PPC_UADDR16", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0xffff, /* dst_mask */
592 FALSE), /* pcrel_offset */
593
594 /* 32-bit PC relative */
595 HOWTO (R_PPC_REL32, /* type */
596 0, /* rightshift */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
598 32, /* bitsize */
599 TRUE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_bitfield, /* complain_on_overflow */
602 bfd_elf_generic_reloc, /* special_function */
603 "R_PPC_REL32", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0xffffffff, /* dst_mask */
607 TRUE), /* pcrel_offset */
608
609 /* 32-bit relocation to the symbol's procedure linkage table.
610 FIXME: not supported. */
611 HOWTO (R_PPC_PLT32, /* type */
612 0, /* rightshift */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
614 32, /* bitsize */
615 FALSE, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_bitfield, /* complain_on_overflow */
618 bfd_elf_generic_reloc, /* special_function */
619 "R_PPC_PLT32", /* name */
620 FALSE, /* partial_inplace */
621 0, /* src_mask */
622 0, /* dst_mask */
623 FALSE), /* pcrel_offset */
624
625 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
626 FIXME: not supported. */
627 HOWTO (R_PPC_PLTREL32, /* type */
628 0, /* rightshift */
629 2, /* size (0 = byte, 1 = short, 2 = long) */
630 32, /* bitsize */
631 TRUE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_bitfield, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC_PLTREL32", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0, /* dst_mask */
639 TRUE), /* pcrel_offset */
640
641 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
642 the symbol. */
643 HOWTO (R_PPC_PLT16_LO, /* type */
644 0, /* rightshift */
645 1, /* size (0 = byte, 1 = short, 2 = long) */
646 16, /* bitsize */
647 FALSE, /* pc_relative */
648 0, /* bitpos */
649 complain_overflow_dont, /* complain_on_overflow */
650 bfd_elf_generic_reloc, /* special_function */
651 "R_PPC_PLT16_LO", /* name */
652 FALSE, /* partial_inplace */
653 0, /* src_mask */
654 0xffff, /* dst_mask */
655 FALSE), /* pcrel_offset */
656
657 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
658 the symbol. */
659 HOWTO (R_PPC_PLT16_HI, /* type */
660 16, /* rightshift */
661 1, /* size (0 = byte, 1 = short, 2 = long) */
662 16, /* bitsize */
663 FALSE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_bitfield, /* complain_on_overflow */
666 bfd_elf_generic_reloc, /* special_function */
667 "R_PPC_PLT16_HI", /* name */
668 FALSE, /* partial_inplace */
669 0, /* src_mask */
670 0xffff, /* dst_mask */
671 FALSE), /* pcrel_offset */
672
673 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
674 the symbol. */
675 HOWTO (R_PPC_PLT16_HA, /* type */
676 16, /* rightshift */
677 1, /* size (0 = byte, 1 = short, 2 = long) */
678 16, /* bitsize */
679 FALSE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_bitfield, /* complain_on_overflow */
682 ppc_elf_addr16_ha_reloc, /* special_function */
683 "R_PPC_PLT16_HA", /* name */
684 FALSE, /* partial_inplace */
685 0, /* src_mask */
686 0xffff, /* dst_mask */
687 FALSE), /* pcrel_offset */
688
689 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
690 small data items. */
691 HOWTO (R_PPC_SDAREL16, /* type */
692 0, /* rightshift */
693 1, /* size (0 = byte, 1 = short, 2 = long) */
694 16, /* bitsize */
695 FALSE, /* pc_relative */
696 0, /* bitpos */
697 complain_overflow_signed, /* complain_on_overflow */
698 bfd_elf_generic_reloc, /* special_function */
699 "R_PPC_SDAREL16", /* name */
700 FALSE, /* partial_inplace */
701 0, /* src_mask */
702 0xffff, /* dst_mask */
703 FALSE), /* pcrel_offset */
704
705 /* 16-bit section relative relocation. */
706 HOWTO (R_PPC_SECTOFF, /* type */
707 0, /* rightshift */
708 1, /* size (0 = byte, 1 = short, 2 = long) */
709 16, /* bitsize */
710 FALSE, /* pc_relative */
711 0, /* bitpos */
712 complain_overflow_bitfield, /* complain_on_overflow */
713 bfd_elf_generic_reloc, /* special_function */
714 "R_PPC_SECTOFF", /* name */
715 FALSE, /* partial_inplace */
716 0, /* src_mask */
717 0xffff, /* dst_mask */
718 FALSE), /* pcrel_offset */
719
720 /* 16-bit lower half section relative relocation. */
721 HOWTO (R_PPC_SECTOFF_LO, /* type */
722 0, /* rightshift */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
724 16, /* bitsize */
725 FALSE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_dont, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 "R_PPC_SECTOFF_LO", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0xffff, /* dst_mask */
733 FALSE), /* pcrel_offset */
734
735 /* 16-bit upper half section relative relocation. */
736 HOWTO (R_PPC_SECTOFF_HI, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_bitfield, /* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 "R_PPC_SECTOFF_HI", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* 16-bit upper half adjusted section relative relocation. */
751 HOWTO (R_PPC_SECTOFF_HA, /* type */
752 16, /* rightshift */
753 1, /* size (0 = byte, 1 = short, 2 = long) */
754 16, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_bitfield, /* complain_on_overflow */
758 ppc_elf_addr16_ha_reloc, /* special_function */
759 "R_PPC_SECTOFF_HA", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0xffff, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Marker relocs for TLS. */
766 HOWTO (R_PPC_TLS,
767 0, /* rightshift */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
769 32, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 bfd_elf_generic_reloc, /* special_function */
774 "R_PPC_TLS", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 HOWTO (R_PPC_TLSGD,
781 0, /* rightshift */
782 2, /* size (0 = byte, 1 = short, 2 = long) */
783 32, /* bitsize */
784 FALSE, /* pc_relative */
785 0, /* bitpos */
786 complain_overflow_dont, /* complain_on_overflow */
787 bfd_elf_generic_reloc, /* special_function */
788 "R_PPC_TLSGD", /* name */
789 FALSE, /* partial_inplace */
790 0, /* src_mask */
791 0, /* dst_mask */
792 FALSE), /* pcrel_offset */
793
794 HOWTO (R_PPC_TLSLD,
795 0, /* rightshift */
796 2, /* size (0 = byte, 1 = short, 2 = long) */
797 32, /* bitsize */
798 FALSE, /* pc_relative */
799 0, /* bitpos */
800 complain_overflow_dont, /* complain_on_overflow */
801 bfd_elf_generic_reloc, /* special_function */
802 "R_PPC_TLSLD", /* name */
803 FALSE, /* partial_inplace */
804 0, /* src_mask */
805 0, /* dst_mask */
806 FALSE), /* pcrel_offset */
807
808 /* Computes the load module index of the load module that contains the
809 definition of its TLS sym. */
810 HOWTO (R_PPC_DTPMOD32,
811 0, /* rightshift */
812 2, /* size (0 = byte, 1 = short, 2 = long) */
813 32, /* bitsize */
814 FALSE, /* pc_relative */
815 0, /* bitpos */
816 complain_overflow_dont, /* complain_on_overflow */
817 ppc_elf_unhandled_reloc, /* special_function */
818 "R_PPC_DTPMOD32", /* name */
819 FALSE, /* partial_inplace */
820 0, /* src_mask */
821 0xffffffff, /* dst_mask */
822 FALSE), /* pcrel_offset */
823
824 /* Computes a dtv-relative displacement, the difference between the value
825 of sym+add and the base address of the thread-local storage block that
826 contains the definition of sym, minus 0x8000. */
827 HOWTO (R_PPC_DTPREL32,
828 0, /* rightshift */
829 2, /* size (0 = byte, 1 = short, 2 = long) */
830 32, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL32", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffffffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* A 16 bit dtprel reloc. */
842 HOWTO (R_PPC_DTPREL16,
843 0, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_signed, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Like DTPREL16, but no overflow. */
857 HOWTO (R_PPC_DTPREL16_LO,
858 0, /* rightshift */
859 1, /* size (0 = byte, 1 = short, 2 = long) */
860 16, /* bitsize */
861 FALSE, /* pc_relative */
862 0, /* bitpos */
863 complain_overflow_dont, /* complain_on_overflow */
864 ppc_elf_unhandled_reloc, /* special_function */
865 "R_PPC_DTPREL16_LO", /* name */
866 FALSE, /* partial_inplace */
867 0, /* src_mask */
868 0xffff, /* dst_mask */
869 FALSE), /* pcrel_offset */
870
871 /* Like DTPREL16_LO, but next higher group of 16 bits. */
872 HOWTO (R_PPC_DTPREL16_HI,
873 16, /* rightshift */
874 1, /* size (0 = byte, 1 = short, 2 = long) */
875 16, /* bitsize */
876 FALSE, /* pc_relative */
877 0, /* bitpos */
878 complain_overflow_dont, /* complain_on_overflow */
879 ppc_elf_unhandled_reloc, /* special_function */
880 "R_PPC_DTPREL16_HI", /* name */
881 FALSE, /* partial_inplace */
882 0, /* src_mask */
883 0xffff, /* dst_mask */
884 FALSE), /* pcrel_offset */
885
886 /* Like DTPREL16_HI, but adjust for low 16 bits. */
887 HOWTO (R_PPC_DTPREL16_HA,
888 16, /* rightshift */
889 1, /* size (0 = byte, 1 = short, 2 = long) */
890 16, /* bitsize */
891 FALSE, /* pc_relative */
892 0, /* bitpos */
893 complain_overflow_dont, /* complain_on_overflow */
894 ppc_elf_unhandled_reloc, /* special_function */
895 "R_PPC_DTPREL16_HA", /* name */
896 FALSE, /* partial_inplace */
897 0, /* src_mask */
898 0xffff, /* dst_mask */
899 FALSE), /* pcrel_offset */
900
901 /* Computes a tp-relative displacement, the difference between the value of
902 sym+add and the value of the thread pointer (r13). */
903 HOWTO (R_PPC_TPREL32,
904 0, /* rightshift */
905 2, /* size (0 = byte, 1 = short, 2 = long) */
906 32, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL32", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffffffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* A 16 bit tprel reloc. */
918 HOWTO (R_PPC_TPREL16,
919 0, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_signed, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Like TPREL16, but no overflow. */
933 HOWTO (R_PPC_TPREL16_LO,
934 0, /* rightshift */
935 1, /* size (0 = byte, 1 = short, 2 = long) */
936 16, /* bitsize */
937 FALSE, /* pc_relative */
938 0, /* bitpos */
939 complain_overflow_dont, /* complain_on_overflow */
940 ppc_elf_unhandled_reloc, /* special_function */
941 "R_PPC_TPREL16_LO", /* name */
942 FALSE, /* partial_inplace */
943 0, /* src_mask */
944 0xffff, /* dst_mask */
945 FALSE), /* pcrel_offset */
946
947 /* Like TPREL16_LO, but next higher group of 16 bits. */
948 HOWTO (R_PPC_TPREL16_HI,
949 16, /* rightshift */
950 1, /* size (0 = byte, 1 = short, 2 = long) */
951 16, /* bitsize */
952 FALSE, /* pc_relative */
953 0, /* bitpos */
954 complain_overflow_dont, /* complain_on_overflow */
955 ppc_elf_unhandled_reloc, /* special_function */
956 "R_PPC_TPREL16_HI", /* name */
957 FALSE, /* partial_inplace */
958 0, /* src_mask */
959 0xffff, /* dst_mask */
960 FALSE), /* pcrel_offset */
961
962 /* Like TPREL16_HI, but adjust for low 16 bits. */
963 HOWTO (R_PPC_TPREL16_HA,
964 16, /* rightshift */
965 1, /* size (0 = byte, 1 = short, 2 = long) */
966 16, /* bitsize */
967 FALSE, /* pc_relative */
968 0, /* bitpos */
969 complain_overflow_dont, /* complain_on_overflow */
970 ppc_elf_unhandled_reloc, /* special_function */
971 "R_PPC_TPREL16_HA", /* name */
972 FALSE, /* partial_inplace */
973 0, /* src_mask */
974 0xffff, /* dst_mask */
975 FALSE), /* pcrel_offset */
976
977 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
978 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
979 to the first entry. */
980 HOWTO (R_PPC_GOT_TLSGD16,
981 0, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_signed, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Like GOT_TLSGD16, but no overflow. */
995 HOWTO (R_PPC_GOT_TLSGD16_LO,
996 0, /* rightshift */
997 1, /* size (0 = byte, 1 = short, 2 = long) */
998 16, /* bitsize */
999 FALSE, /* pc_relative */
1000 0, /* bitpos */
1001 complain_overflow_dont, /* complain_on_overflow */
1002 ppc_elf_unhandled_reloc, /* special_function */
1003 "R_PPC_GOT_TLSGD16_LO", /* name */
1004 FALSE, /* partial_inplace */
1005 0, /* src_mask */
1006 0xffff, /* dst_mask */
1007 FALSE), /* pcrel_offset */
1008
1009 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1010 HOWTO (R_PPC_GOT_TLSGD16_HI,
1011 16, /* rightshift */
1012 1, /* size (0 = byte, 1 = short, 2 = long) */
1013 16, /* bitsize */
1014 FALSE, /* pc_relative */
1015 0, /* bitpos */
1016 complain_overflow_dont, /* complain_on_overflow */
1017 ppc_elf_unhandled_reloc, /* special_function */
1018 "R_PPC_GOT_TLSGD16_HI", /* name */
1019 FALSE, /* partial_inplace */
1020 0, /* src_mask */
1021 0xffff, /* dst_mask */
1022 FALSE), /* pcrel_offset */
1023
1024 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1025 HOWTO (R_PPC_GOT_TLSGD16_HA,
1026 16, /* rightshift */
1027 1, /* size (0 = byte, 1 = short, 2 = long) */
1028 16, /* bitsize */
1029 FALSE, /* pc_relative */
1030 0, /* bitpos */
1031 complain_overflow_dont, /* complain_on_overflow */
1032 ppc_elf_unhandled_reloc, /* special_function */
1033 "R_PPC_GOT_TLSGD16_HA", /* name */
1034 FALSE, /* partial_inplace */
1035 0, /* src_mask */
1036 0xffff, /* dst_mask */
1037 FALSE), /* pcrel_offset */
1038
1039 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1040 with values (sym+add)@dtpmod and zero, and computes the offset to the
1041 first entry. */
1042 HOWTO (R_PPC_GOT_TLSLD16,
1043 0, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_signed, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Like GOT_TLSLD16, but no overflow. */
1057 HOWTO (R_PPC_GOT_TLSLD16_LO,
1058 0, /* rightshift */
1059 1, /* size (0 = byte, 1 = short, 2 = long) */
1060 16, /* bitsize */
1061 FALSE, /* pc_relative */
1062 0, /* bitpos */
1063 complain_overflow_dont, /* complain_on_overflow */
1064 ppc_elf_unhandled_reloc, /* special_function */
1065 "R_PPC_GOT_TLSLD16_LO", /* name */
1066 FALSE, /* partial_inplace */
1067 0, /* src_mask */
1068 0xffff, /* dst_mask */
1069 FALSE), /* pcrel_offset */
1070
1071 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1072 HOWTO (R_PPC_GOT_TLSLD16_HI,
1073 16, /* rightshift */
1074 1, /* size (0 = byte, 1 = short, 2 = long) */
1075 16, /* bitsize */
1076 FALSE, /* pc_relative */
1077 0, /* bitpos */
1078 complain_overflow_dont, /* complain_on_overflow */
1079 ppc_elf_unhandled_reloc, /* special_function */
1080 "R_PPC_GOT_TLSLD16_HI", /* name */
1081 FALSE, /* partial_inplace */
1082 0, /* src_mask */
1083 0xffff, /* dst_mask */
1084 FALSE), /* pcrel_offset */
1085
1086 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1087 HOWTO (R_PPC_GOT_TLSLD16_HA,
1088 16, /* rightshift */
1089 1, /* size (0 = byte, 1 = short, 2 = long) */
1090 16, /* bitsize */
1091 FALSE, /* pc_relative */
1092 0, /* bitpos */
1093 complain_overflow_dont, /* complain_on_overflow */
1094 ppc_elf_unhandled_reloc, /* special_function */
1095 "R_PPC_GOT_TLSLD16_HA", /* name */
1096 FALSE, /* partial_inplace */
1097 0, /* src_mask */
1098 0xffff, /* dst_mask */
1099 FALSE), /* pcrel_offset */
1100
1101 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1102 the offset to the entry. */
1103 HOWTO (R_PPC_GOT_DTPREL16,
1104 0, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_signed, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Like GOT_DTPREL16, but no overflow. */
1118 HOWTO (R_PPC_GOT_DTPREL16_LO,
1119 0, /* rightshift */
1120 1, /* size (0 = byte, 1 = short, 2 = long) */
1121 16, /* bitsize */
1122 FALSE, /* pc_relative */
1123 0, /* bitpos */
1124 complain_overflow_dont, /* complain_on_overflow */
1125 ppc_elf_unhandled_reloc, /* special_function */
1126 "R_PPC_GOT_DTPREL16_LO", /* name */
1127 FALSE, /* partial_inplace */
1128 0, /* src_mask */
1129 0xffff, /* dst_mask */
1130 FALSE), /* pcrel_offset */
1131
1132 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1133 HOWTO (R_PPC_GOT_DTPREL16_HI,
1134 16, /* rightshift */
1135 1, /* size (0 = byte, 1 = short, 2 = long) */
1136 16, /* bitsize */
1137 FALSE, /* pc_relative */
1138 0, /* bitpos */
1139 complain_overflow_dont, /* complain_on_overflow */
1140 ppc_elf_unhandled_reloc, /* special_function */
1141 "R_PPC_GOT_DTPREL16_HI", /* name */
1142 FALSE, /* partial_inplace */
1143 0, /* src_mask */
1144 0xffff, /* dst_mask */
1145 FALSE), /* pcrel_offset */
1146
1147 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1148 HOWTO (R_PPC_GOT_DTPREL16_HA,
1149 16, /* rightshift */
1150 1, /* size (0 = byte, 1 = short, 2 = long) */
1151 16, /* bitsize */
1152 FALSE, /* pc_relative */
1153 0, /* bitpos */
1154 complain_overflow_dont, /* complain_on_overflow */
1155 ppc_elf_unhandled_reloc, /* special_function */
1156 "R_PPC_GOT_DTPREL16_HA", /* name */
1157 FALSE, /* partial_inplace */
1158 0, /* src_mask */
1159 0xffff, /* dst_mask */
1160 FALSE), /* pcrel_offset */
1161
1162 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1163 offset to the entry. */
1164 HOWTO (R_PPC_GOT_TPREL16,
1165 0, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_signed, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* Like GOT_TPREL16, but no overflow. */
1179 HOWTO (R_PPC_GOT_TPREL16_LO,
1180 0, /* rightshift */
1181 1, /* size (0 = byte, 1 = short, 2 = long) */
1182 16, /* bitsize */
1183 FALSE, /* pc_relative */
1184 0, /* bitpos */
1185 complain_overflow_dont, /* complain_on_overflow */
1186 ppc_elf_unhandled_reloc, /* special_function */
1187 "R_PPC_GOT_TPREL16_LO", /* name */
1188 FALSE, /* partial_inplace */
1189 0, /* src_mask */
1190 0xffff, /* dst_mask */
1191 FALSE), /* pcrel_offset */
1192
1193 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1194 HOWTO (R_PPC_GOT_TPREL16_HI,
1195 16, /* rightshift */
1196 1, /* size (0 = byte, 1 = short, 2 = long) */
1197 16, /* bitsize */
1198 FALSE, /* pc_relative */
1199 0, /* bitpos */
1200 complain_overflow_dont, /* complain_on_overflow */
1201 ppc_elf_unhandled_reloc, /* special_function */
1202 "R_PPC_GOT_TPREL16_HI", /* name */
1203 FALSE, /* partial_inplace */
1204 0, /* src_mask */
1205 0xffff, /* dst_mask */
1206 FALSE), /* pcrel_offset */
1207
1208 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1209 HOWTO (R_PPC_GOT_TPREL16_HA,
1210 16, /* rightshift */
1211 1, /* size (0 = byte, 1 = short, 2 = long) */
1212 16, /* bitsize */
1213 FALSE, /* pc_relative */
1214 0, /* bitpos */
1215 complain_overflow_dont, /* complain_on_overflow */
1216 ppc_elf_unhandled_reloc, /* special_function */
1217 "R_PPC_GOT_TPREL16_HA", /* name */
1218 FALSE, /* partial_inplace */
1219 0, /* src_mask */
1220 0xffff, /* dst_mask */
1221 FALSE), /* pcrel_offset */
1222
1223 /* The remaining relocs are from the Embedded ELF ABI, and are not
1224 in the SVR4 ELF ABI. */
1225
1226 /* 32 bit value resulting from the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR32, /* type */
1228 0, /* rightshift */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1230 32, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_bitfield, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR32", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffffffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* 16 bit value resulting from the addend minus the symbol. */
1242 HOWTO (R_PPC_EMB_NADDR16, /* type */
1243 0, /* rightshift */
1244 1, /* size (0 = byte, 1 = short, 2 = long) */
1245 16, /* bitsize */
1246 FALSE, /* pc_relative */
1247 0, /* bitpos */
1248 complain_overflow_bitfield, /* complain_on_overflow */
1249 bfd_elf_generic_reloc, /* special_function */
1250 "R_PPC_EMB_NADDR16", /* name */
1251 FALSE, /* partial_inplace */
1252 0, /* src_mask */
1253 0xffff, /* dst_mask */
1254 FALSE), /* pcrel_offset */
1255
1256 /* 16 bit value resulting from the addend minus the symbol. */
1257 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1258 0, /* rightshift */
1259 1, /* size (0 = byte, 1 = short, 2 = long) */
1260 16, /* bitsize */
1261 FALSE, /* pc_relative */
1262 0, /* bitpos */
1263 complain_overflow_dont,/* complain_on_overflow */
1264 bfd_elf_generic_reloc, /* special_function */
1265 "R_PPC_EMB_ADDR16_LO", /* name */
1266 FALSE, /* partial_inplace */
1267 0, /* src_mask */
1268 0xffff, /* dst_mask */
1269 FALSE), /* pcrel_offset */
1270
1271 /* The high order 16 bits of the addend minus the symbol. */
1272 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1273 16, /* rightshift */
1274 1, /* size (0 = byte, 1 = short, 2 = long) */
1275 16, /* bitsize */
1276 FALSE, /* pc_relative */
1277 0, /* bitpos */
1278 complain_overflow_dont, /* complain_on_overflow */
1279 bfd_elf_generic_reloc, /* special_function */
1280 "R_PPC_EMB_NADDR16_HI", /* name */
1281 FALSE, /* partial_inplace */
1282 0, /* src_mask */
1283 0xffff, /* dst_mask */
1284 FALSE), /* pcrel_offset */
1285
1286 /* The high order 16 bits of the result of the addend minus the address,
1287 plus 1 if the contents of the low 16 bits, treated as a signed number,
1288 is negative. */
1289 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1290 16, /* rightshift */
1291 1, /* size (0 = byte, 1 = short, 2 = long) */
1292 16, /* bitsize */
1293 FALSE, /* pc_relative */
1294 0, /* bitpos */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 ppc_elf_addr16_ha_reloc, /* special_function */
1297 "R_PPC_EMB_NADDR16_HA", /* name */
1298 FALSE, /* partial_inplace */
1299 0, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1302
1303 /* 16 bit value resulting from allocating a 4 byte word to hold an
1304 address in the .sdata section, and returning the offset from
1305 _SDA_BASE_ for that relocation. */
1306 HOWTO (R_PPC_EMB_SDAI16, /* type */
1307 0, /* rightshift */
1308 1, /* size (0 = byte, 1 = short, 2 = long) */
1309 16, /* bitsize */
1310 FALSE, /* pc_relative */
1311 0, /* bitpos */
1312 complain_overflow_signed, /* complain_on_overflow */
1313 bfd_elf_generic_reloc, /* special_function */
1314 "R_PPC_EMB_SDAI16", /* name */
1315 FALSE, /* partial_inplace */
1316 0, /* src_mask */
1317 0xffff, /* dst_mask */
1318 FALSE), /* pcrel_offset */
1319
1320 /* 16 bit value resulting from allocating a 4 byte word to hold an
1321 address in the .sdata2 section, and returning the offset from
1322 _SDA2_BASE_ for that relocation. */
1323 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1324 0, /* rightshift */
1325 1, /* size (0 = byte, 1 = short, 2 = long) */
1326 16, /* bitsize */
1327 FALSE, /* pc_relative */
1328 0, /* bitpos */
1329 complain_overflow_signed, /* complain_on_overflow */
1330 bfd_elf_generic_reloc, /* special_function */
1331 "R_PPC_EMB_SDA2I16", /* name */
1332 FALSE, /* partial_inplace */
1333 0, /* src_mask */
1334 0xffff, /* dst_mask */
1335 FALSE), /* pcrel_offset */
1336
1337 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1338 small data items. */
1339 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1340 0, /* rightshift */
1341 1, /* size (0 = byte, 1 = short, 2 = long) */
1342 16, /* bitsize */
1343 FALSE, /* pc_relative */
1344 0, /* bitpos */
1345 complain_overflow_signed, /* complain_on_overflow */
1346 bfd_elf_generic_reloc, /* special_function */
1347 "R_PPC_EMB_SDA2REL", /* name */
1348 FALSE, /* partial_inplace */
1349 0, /* src_mask */
1350 0xffff, /* dst_mask */
1351 FALSE), /* pcrel_offset */
1352
1353 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1354 signed offset from the appropriate base, and filling in the register
1355 field with the appropriate register (0, 2, or 13). */
1356 HOWTO (R_PPC_EMB_SDA21, /* type */
1357 0, /* rightshift */
1358 2, /* size (0 = byte, 1 = short, 2 = long) */
1359 16, /* bitsize */
1360 FALSE, /* pc_relative */
1361 0, /* bitpos */
1362 complain_overflow_signed, /* complain_on_overflow */
1363 bfd_elf_generic_reloc, /* special_function */
1364 "R_PPC_EMB_SDA21", /* name */
1365 FALSE, /* partial_inplace */
1366 0, /* src_mask */
1367 0xffff, /* dst_mask */
1368 FALSE), /* pcrel_offset */
1369
1370 /* Relocation not handled: R_PPC_EMB_MRKREF */
1371 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1372 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1373 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1374 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1375 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1376
1377 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1378 in the 16 bit signed offset from the appropriate base, and filling in the
1379 register field with the appropriate register (0, 2, or 13). */
1380 HOWTO (R_PPC_EMB_RELSDA, /* type */
1381 0, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 FALSE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_signed, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_EMB_RELSDA", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 FALSE), /* pcrel_offset */
1393
1394 HOWTO (R_PPC_IRELATIVE, /* type */
1395 0, /* rightshift */
1396 2, /* size (0 = byte, 1 = short, 2 = long) */
1397 32, /* bitsize */
1398 FALSE, /* pc_relative */
1399 0, /* bitpos */
1400 complain_overflow_bitfield, /* complain_on_overflow */
1401 bfd_elf_generic_reloc, /* special_function */
1402 "R_PPC_IRELATIVE", /* name */
1403 FALSE, /* partial_inplace */
1404 0, /* src_mask */
1405 0xffffffff, /* dst_mask */
1406 FALSE), /* pcrel_offset */
1407
1408 /* A 16 bit relative relocation. */
1409 HOWTO (R_PPC_REL16, /* type */
1410 0, /* rightshift */
1411 1, /* size (0 = byte, 1 = short, 2 = long) */
1412 16, /* bitsize */
1413 TRUE, /* pc_relative */
1414 0, /* bitpos */
1415 complain_overflow_bitfield, /* complain_on_overflow */
1416 bfd_elf_generic_reloc, /* special_function */
1417 "R_PPC_REL16", /* name */
1418 FALSE, /* partial_inplace */
1419 0, /* src_mask */
1420 0xffff, /* dst_mask */
1421 TRUE), /* pcrel_offset */
1422
1423 /* A 16 bit relative relocation without overflow. */
1424 HOWTO (R_PPC_REL16_LO, /* type */
1425 0, /* rightshift */
1426 1, /* size (0 = byte, 1 = short, 2 = long) */
1427 16, /* bitsize */
1428 TRUE, /* pc_relative */
1429 0, /* bitpos */
1430 complain_overflow_dont,/* complain_on_overflow */
1431 bfd_elf_generic_reloc, /* special_function */
1432 "R_PPC_REL16_LO", /* name */
1433 FALSE, /* partial_inplace */
1434 0, /* src_mask */
1435 0xffff, /* dst_mask */
1436 TRUE), /* pcrel_offset */
1437
1438 /* The high order 16 bits of a relative address. */
1439 HOWTO (R_PPC_REL16_HI, /* type */
1440 16, /* rightshift */
1441 1, /* size (0 = byte, 1 = short, 2 = long) */
1442 16, /* bitsize */
1443 TRUE, /* pc_relative */
1444 0, /* bitpos */
1445 complain_overflow_dont, /* complain_on_overflow */
1446 bfd_elf_generic_reloc, /* special_function */
1447 "R_PPC_REL16_HI", /* name */
1448 FALSE, /* partial_inplace */
1449 0, /* src_mask */
1450 0xffff, /* dst_mask */
1451 TRUE), /* pcrel_offset */
1452
1453 /* The high order 16 bits of a relative address, plus 1 if the contents of
1454 the low 16 bits, treated as a signed number, is negative. */
1455 HOWTO (R_PPC_REL16_HA, /* type */
1456 16, /* rightshift */
1457 1, /* size (0 = byte, 1 = short, 2 = long) */
1458 16, /* bitsize */
1459 TRUE, /* pc_relative */
1460 0, /* bitpos */
1461 complain_overflow_dont, /* complain_on_overflow */
1462 ppc_elf_addr16_ha_reloc, /* special_function */
1463 "R_PPC_REL16_HA", /* name */
1464 FALSE, /* partial_inplace */
1465 0, /* src_mask */
1466 0xffff, /* dst_mask */
1467 TRUE), /* pcrel_offset */
1468
1469 /* GNU extension to record C++ vtable hierarchy. */
1470 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1471 0, /* rightshift */
1472 0, /* size (0 = byte, 1 = short, 2 = long) */
1473 0, /* bitsize */
1474 FALSE, /* pc_relative */
1475 0, /* bitpos */
1476 complain_overflow_dont, /* complain_on_overflow */
1477 NULL, /* special_function */
1478 "R_PPC_GNU_VTINHERIT", /* name */
1479 FALSE, /* partial_inplace */
1480 0, /* src_mask */
1481 0, /* dst_mask */
1482 FALSE), /* pcrel_offset */
1483
1484 /* GNU extension to record C++ vtable member usage. */
1485 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1486 0, /* rightshift */
1487 0, /* size (0 = byte, 1 = short, 2 = long) */
1488 0, /* bitsize */
1489 FALSE, /* pc_relative */
1490 0, /* bitpos */
1491 complain_overflow_dont, /* complain_on_overflow */
1492 NULL, /* special_function */
1493 "R_PPC_GNU_VTENTRY", /* name */
1494 FALSE, /* partial_inplace */
1495 0, /* src_mask */
1496 0, /* dst_mask */
1497 FALSE), /* pcrel_offset */
1498
1499 /* Phony reloc to handle AIX style TOC entries. */
1500 HOWTO (R_PPC_TOC16, /* type */
1501 0, /* rightshift */
1502 1, /* size (0 = byte, 1 = short, 2 = long) */
1503 16, /* bitsize */
1504 FALSE, /* pc_relative */
1505 0, /* bitpos */
1506 complain_overflow_signed, /* complain_on_overflow */
1507 bfd_elf_generic_reloc, /* special_function */
1508 "R_PPC_TOC16", /* name */
1509 FALSE, /* partial_inplace */
1510 0, /* src_mask */
1511 0xffff, /* dst_mask */
1512 FALSE), /* pcrel_offset */
1513 };
1514 \f
1515 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1516
1517 static void
1518 ppc_elf_howto_init (void)
1519 {
1520 unsigned int i, type;
1521
1522 for (i = 0;
1523 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1524 i++)
1525 {
1526 type = ppc_elf_howto_raw[i].type;
1527 if (type >= (sizeof (ppc_elf_howto_table)
1528 / sizeof (ppc_elf_howto_table[0])))
1529 abort ();
1530 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1531 }
1532 }
1533
1534 static reloc_howto_type *
1535 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1536 bfd_reloc_code_real_type code)
1537 {
1538 enum elf_ppc_reloc_type r;
1539
1540 /* Initialize howto table if not already done. */
1541 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1542 ppc_elf_howto_init ();
1543
1544 switch (code)
1545 {
1546 default:
1547 return NULL;
1548
1549 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1550 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1551 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1552 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1553 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1554 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1555 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1556 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1557 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1558 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1559 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1560 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1561 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1562 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1563 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1564 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1565 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1566 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1567 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1568 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1569 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1570 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1571 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1572 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1573 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1574 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1575 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1576 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1577 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1578 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1579 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1580 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1581 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1582 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1583 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1584 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1585 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1586 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1587 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1588 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1589 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1590 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1591 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1592 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1593 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1594 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1595 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1596 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1597 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1598 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1599 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1600 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1601 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1602 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1603 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1604 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1605 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1606 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1607 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1608 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1609 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1610 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1611 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1612 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1613 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1614 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1615 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1616 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1617 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1618 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1619 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1620 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1621 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1622 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1623 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1624 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1625 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1626 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1627 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1628 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1629 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1630 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1631 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1632 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1633 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1634 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1635 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1636 }
1637
1638 return ppc_elf_howto_table[r];
1639 };
1640
1641 static reloc_howto_type *
1642 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1643 const char *r_name)
1644 {
1645 unsigned int i;
1646
1647 for (i = 0;
1648 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1649 i++)
1650 if (ppc_elf_howto_raw[i].name != NULL
1651 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1652 return &ppc_elf_howto_raw[i];
1653
1654 return NULL;
1655 }
1656
1657 /* Set the howto pointer for a PowerPC ELF reloc. */
1658
1659 static void
1660 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1661 arelent *cache_ptr,
1662 Elf_Internal_Rela *dst)
1663 {
1664 /* Initialize howto table if not already done. */
1665 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1666 ppc_elf_howto_init ();
1667
1668 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1669 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1670
1671 /* Just because the above assert didn't trigger doesn't mean that
1672 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1673 if (!cache_ptr->howto)
1674 {
1675 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1676 abfd, ELF32_R_TYPE (dst->r_info));
1677 bfd_set_error (bfd_error_bad_value);
1678
1679 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1680 }
1681 }
1682
1683 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1684
1685 static bfd_reloc_status_type
1686 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1687 arelent *reloc_entry,
1688 asymbol *symbol,
1689 void *data ATTRIBUTE_UNUSED,
1690 asection *input_section,
1691 bfd *output_bfd,
1692 char **error_message ATTRIBUTE_UNUSED)
1693 {
1694 bfd_vma relocation;
1695
1696 if (output_bfd != NULL)
1697 {
1698 reloc_entry->address += input_section->output_offset;
1699 return bfd_reloc_ok;
1700 }
1701
1702 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1703 return bfd_reloc_outofrange;
1704
1705 if (bfd_is_com_section (symbol->section))
1706 relocation = 0;
1707 else
1708 relocation = symbol->value;
1709
1710 relocation += symbol->section->output_section->vma;
1711 relocation += symbol->section->output_offset;
1712 relocation += reloc_entry->addend;
1713 if (reloc_entry->howto->pc_relative)
1714 relocation -= reloc_entry->address;
1715
1716 reloc_entry->addend += (relocation & 0x8000) << 1;
1717
1718 return bfd_reloc_continue;
1719 }
1720
1721 static bfd_reloc_status_type
1722 ppc_elf_unhandled_reloc (bfd *abfd,
1723 arelent *reloc_entry,
1724 asymbol *symbol,
1725 void *data,
1726 asection *input_section,
1727 bfd *output_bfd,
1728 char **error_message)
1729 {
1730 /* If this is a relocatable link (output_bfd test tells us), just
1731 call the generic function. Any adjustment will be done at final
1732 link time. */
1733 if (output_bfd != NULL)
1734 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1735 input_section, output_bfd, error_message);
1736
1737 if (error_message != NULL)
1738 {
1739 static char buf[60];
1740 sprintf (buf, _("generic linker can't handle %s"),
1741 reloc_entry->howto->name);
1742 *error_message = buf;
1743 }
1744 return bfd_reloc_dangerous;
1745 }
1746 \f
1747 /* Sections created by the linker. */
1748
1749 typedef struct elf_linker_section
1750 {
1751 /* Pointer to the bfd section. */
1752 asection *section;
1753 /* Section name. */
1754 const char *name;
1755 /* Associated bss section name. */
1756 const char *bss_name;
1757 /* Associated symbol name. */
1758 const char *sym_name;
1759 /* Associated symbol. */
1760 struct elf_link_hash_entry *sym;
1761 } elf_linker_section_t;
1762
1763 /* Linked list of allocated pointer entries. This hangs off of the
1764 symbol lists, and provides allows us to return different pointers,
1765 based on different addend's. */
1766
1767 typedef struct elf_linker_section_pointers
1768 {
1769 /* next allocated pointer for this symbol */
1770 struct elf_linker_section_pointers *next;
1771 /* offset of pointer from beginning of section */
1772 bfd_vma offset;
1773 /* addend used */
1774 bfd_vma addend;
1775 /* which linker section this is */
1776 elf_linker_section_t *lsect;
1777 } elf_linker_section_pointers_t;
1778
1779 struct ppc_elf_obj_tdata
1780 {
1781 struct elf_obj_tdata elf;
1782
1783 /* A mapping from local symbols to offsets into the various linker
1784 sections added. This is index by the symbol index. */
1785 elf_linker_section_pointers_t **linker_section_pointers;
1786
1787 /* Flags used to auto-detect plt type. */
1788 unsigned int makes_plt_call : 1;
1789 unsigned int has_rel16 : 1;
1790 };
1791
1792 #define ppc_elf_tdata(bfd) \
1793 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1794
1795 #define elf_local_ptr_offsets(bfd) \
1796 (ppc_elf_tdata (bfd)->linker_section_pointers)
1797
1798 #define is_ppc_elf(bfd) \
1799 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1800 && elf_object_id (bfd) == PPC32_ELF_DATA)
1801
1802 /* Override the generic function because we store some extras. */
1803
1804 static bfd_boolean
1805 ppc_elf_mkobject (bfd *abfd)
1806 {
1807 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1808 PPC32_ELF_DATA);
1809 }
1810
1811 /* Fix bad default arch selected for a 32 bit input bfd when the
1812 default is 64 bit. */
1813
1814 static bfd_boolean
1815 ppc_elf_object_p (bfd *abfd)
1816 {
1817 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1818 {
1819 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1820
1821 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1822 {
1823 /* Relies on arch after 64 bit default being 32 bit default. */
1824 abfd->arch_info = abfd->arch_info->next;
1825 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1826 }
1827 }
1828 return TRUE;
1829 }
1830
1831 /* Function to set whether a module needs the -mrelocatable bit set. */
1832
1833 static bfd_boolean
1834 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1835 {
1836 BFD_ASSERT (!elf_flags_init (abfd)
1837 || elf_elfheader (abfd)->e_flags == flags);
1838
1839 elf_elfheader (abfd)->e_flags = flags;
1840 elf_flags_init (abfd) = TRUE;
1841 return TRUE;
1842 }
1843
1844 /* Support for core dump NOTE sections. */
1845
1846 static bfd_boolean
1847 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1848 {
1849 int offset;
1850 unsigned int size;
1851
1852 switch (note->descsz)
1853 {
1854 default:
1855 return FALSE;
1856
1857 case 268: /* Linux/PPC. */
1858 /* pr_cursig */
1859 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1860
1861 /* pr_pid */
1862 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
1863
1864 /* pr_reg */
1865 offset = 72;
1866 size = 192;
1867
1868 break;
1869 }
1870
1871 /* Make a ".reg/999" section. */
1872 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1873 size, note->descpos + offset);
1874 }
1875
1876 static bfd_boolean
1877 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1878 {
1879 switch (note->descsz)
1880 {
1881 default:
1882 return FALSE;
1883
1884 case 128: /* Linux/PPC elf_prpsinfo. */
1885 elf_tdata (abfd)->core_pid
1886 = bfd_get_32 (abfd, note->descdata + 16);
1887 elf_tdata (abfd)->core_program
1888 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1889 elf_tdata (abfd)->core_command
1890 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1891 }
1892
1893 /* Note that for some reason, a spurious space is tacked
1894 onto the end of the args in some (at least one anyway)
1895 implementations, so strip it off if it exists. */
1896
1897 {
1898 char *command = elf_tdata (abfd)->core_command;
1899 int n = strlen (command);
1900
1901 if (0 < n && command[n - 1] == ' ')
1902 command[n - 1] = '\0';
1903 }
1904
1905 return TRUE;
1906 }
1907
1908 static char *
1909 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1910 {
1911 switch (note_type)
1912 {
1913 default:
1914 return NULL;
1915
1916 case NT_PRPSINFO:
1917 {
1918 char data[128];
1919 va_list ap;
1920
1921 va_start (ap, note_type);
1922 memset (data, 0, 32);
1923 strncpy (data + 32, va_arg (ap, const char *), 16);
1924 strncpy (data + 48, va_arg (ap, const char *), 80);
1925 va_end (ap);
1926 return elfcore_write_note (abfd, buf, bufsiz,
1927 "CORE", note_type, data, sizeof (data));
1928 }
1929
1930 case NT_PRSTATUS:
1931 {
1932 char data[268];
1933 va_list ap;
1934 long pid;
1935 int cursig;
1936 const void *greg;
1937
1938 va_start (ap, note_type);
1939 memset (data, 0, 72);
1940 pid = va_arg (ap, long);
1941 bfd_put_32 (abfd, pid, data + 24);
1942 cursig = va_arg (ap, int);
1943 bfd_put_16 (abfd, cursig, data + 12);
1944 greg = va_arg (ap, const void *);
1945 memcpy (data + 72, greg, 192);
1946 memset (data + 264, 0, 4);
1947 va_end (ap);
1948 return elfcore_write_note (abfd, buf, bufsiz,
1949 "CORE", note_type, data, sizeof (data));
1950 }
1951 }
1952 }
1953
1954 /* Return address for Ith PLT stub in section PLT, for relocation REL
1955 or (bfd_vma) -1 if it should not be included. */
1956
1957 static bfd_vma
1958 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1959 const asection *plt ATTRIBUTE_UNUSED,
1960 const arelent *rel)
1961 {
1962 return rel->address;
1963 }
1964
1965 /* Handle a PowerPC specific section when reading an object file. This
1966 is called when bfd_section_from_shdr finds a section with an unknown
1967 type. */
1968
1969 static bfd_boolean
1970 ppc_elf_section_from_shdr (bfd *abfd,
1971 Elf_Internal_Shdr *hdr,
1972 const char *name,
1973 int shindex)
1974 {
1975 asection *newsect;
1976 flagword flags;
1977
1978 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1979 return FALSE;
1980
1981 newsect = hdr->bfd_section;
1982 flags = bfd_get_section_flags (abfd, newsect);
1983 if (hdr->sh_flags & SHF_EXCLUDE)
1984 flags |= SEC_EXCLUDE;
1985
1986 if (hdr->sh_type == SHT_ORDERED)
1987 flags |= SEC_SORT_ENTRIES;
1988
1989 bfd_set_section_flags (abfd, newsect, flags);
1990 return TRUE;
1991 }
1992
1993 /* Set up any other section flags and such that may be necessary. */
1994
1995 static bfd_boolean
1996 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1997 Elf_Internal_Shdr *shdr,
1998 asection *asect)
1999 {
2000 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2001 shdr->sh_type = SHT_ORDERED;
2002
2003 return TRUE;
2004 }
2005
2006 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2007 need to bump up the number of section headers. */
2008
2009 static int
2010 ppc_elf_additional_program_headers (bfd *abfd,
2011 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2012 {
2013 asection *s;
2014 int ret = 0;
2015
2016 s = bfd_get_section_by_name (abfd, ".sbss2");
2017 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2018 ++ret;
2019
2020 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2021 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2022 ++ret;
2023
2024 return ret;
2025 }
2026
2027 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2028 .PPC.EMB.sbss0 a normal section, and not a bss section so
2029 that the linker doesn't crater when trying to make more than
2030 2 sections. */
2031
2032 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2033 {
2034 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2035 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2036 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2037 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2038 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2039 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2040 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2041 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2042 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2043 { NULL, 0, 0, 0, 0 }
2044 };
2045
2046 /* This is what we want for new plt/got. */
2047 static struct bfd_elf_special_section ppc_alt_plt =
2048 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2049
2050 static const struct bfd_elf_special_section *
2051 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2052 {
2053 const struct bfd_elf_special_section *ssect;
2054
2055 /* See if this is one of the special sections. */
2056 if (sec->name == NULL)
2057 return NULL;
2058
2059 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2060 sec->use_rela_p);
2061 if (ssect != NULL)
2062 {
2063 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2064 ssect = &ppc_alt_plt;
2065 return ssect;
2066 }
2067
2068 return _bfd_elf_get_sec_type_attr (abfd, sec);
2069 }
2070 \f
2071 /* Very simple linked list structure for recording apuinfo values. */
2072 typedef struct apuinfo_list
2073 {
2074 struct apuinfo_list *next;
2075 unsigned long value;
2076 }
2077 apuinfo_list;
2078
2079 static apuinfo_list *head;
2080 static bfd_boolean apuinfo_set;
2081
2082 static void
2083 apuinfo_list_init (void)
2084 {
2085 head = NULL;
2086 apuinfo_set = FALSE;
2087 }
2088
2089 static void
2090 apuinfo_list_add (unsigned long value)
2091 {
2092 apuinfo_list *entry = head;
2093
2094 while (entry != NULL)
2095 {
2096 if (entry->value == value)
2097 return;
2098 entry = entry->next;
2099 }
2100
2101 entry = bfd_malloc (sizeof (* entry));
2102 if (entry == NULL)
2103 return;
2104
2105 entry->value = value;
2106 entry->next = head;
2107 head = entry;
2108 }
2109
2110 static unsigned
2111 apuinfo_list_length (void)
2112 {
2113 apuinfo_list *entry;
2114 unsigned long count;
2115
2116 for (entry = head, count = 0;
2117 entry;
2118 entry = entry->next)
2119 ++ count;
2120
2121 return count;
2122 }
2123
2124 static inline unsigned long
2125 apuinfo_list_element (unsigned long number)
2126 {
2127 apuinfo_list * entry;
2128
2129 for (entry = head;
2130 entry && number --;
2131 entry = entry->next)
2132 ;
2133
2134 return entry ? entry->value : 0;
2135 }
2136
2137 static void
2138 apuinfo_list_finish (void)
2139 {
2140 apuinfo_list *entry;
2141
2142 for (entry = head; entry;)
2143 {
2144 apuinfo_list *next = entry->next;
2145 free (entry);
2146 entry = next;
2147 }
2148
2149 head = NULL;
2150 }
2151
2152 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2153 #define APUINFO_LABEL "APUinfo"
2154
2155 /* Scan the input BFDs and create a linked list of
2156 the APUinfo values that will need to be emitted. */
2157
2158 static void
2159 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2160 {
2161 bfd *ibfd;
2162 asection *asec;
2163 char *buffer = NULL;
2164 bfd_size_type largest_input_size = 0;
2165 unsigned i;
2166 unsigned long length;
2167 const char *error_message = NULL;
2168
2169 if (link_info == NULL)
2170 return;
2171
2172 apuinfo_list_init ();
2173
2174 /* Read in the input sections contents. */
2175 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2176 {
2177 unsigned long datum;
2178
2179 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2180 if (asec == NULL)
2181 continue;
2182
2183 error_message = _("corrupt %s section in %B");
2184 length = asec->size;
2185 if (length < 20)
2186 goto fail;
2187
2188 apuinfo_set = TRUE;
2189 if (largest_input_size < asec->size)
2190 {
2191 if (buffer)
2192 free (buffer);
2193 largest_input_size = asec->size;
2194 buffer = bfd_malloc (largest_input_size);
2195 if (!buffer)
2196 return;
2197 }
2198
2199 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2200 || (bfd_bread (buffer, length, ibfd) != length))
2201 {
2202 error_message = _("unable to read in %s section from %B");
2203 goto fail;
2204 }
2205
2206 /* Verify the contents of the header. Note - we have to
2207 extract the values this way in order to allow for a
2208 host whose endian-ness is different from the target. */
2209 datum = bfd_get_32 (ibfd, buffer);
2210 if (datum != sizeof APUINFO_LABEL)
2211 goto fail;
2212
2213 datum = bfd_get_32 (ibfd, buffer + 8);
2214 if (datum != 0x2)
2215 goto fail;
2216
2217 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2218 goto fail;
2219
2220 /* Get the number of bytes used for apuinfo entries. */
2221 datum = bfd_get_32 (ibfd, buffer + 4);
2222 if (datum + 20 != length)
2223 goto fail;
2224
2225 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2226 for (i = 0; i < datum; i += 4)
2227 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2228 }
2229
2230 error_message = NULL;
2231
2232 if (apuinfo_set)
2233 {
2234 /* Compute the size of the output section. */
2235 unsigned num_entries = apuinfo_list_length ();
2236
2237 /* Set the output section size, if it exists. */
2238 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2239
2240 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2241 {
2242 ibfd = abfd;
2243 error_message = _("warning: unable to set size of %s section in %B");
2244 }
2245 }
2246
2247 fail:
2248 if (buffer)
2249 free (buffer);
2250
2251 if (error_message)
2252 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2253 }
2254
2255 /* Prevent the output section from accumulating the input sections'
2256 contents. We have already stored this in our linked list structure. */
2257
2258 static bfd_boolean
2259 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2260 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2261 asection *asec,
2262 bfd_byte *contents ATTRIBUTE_UNUSED)
2263 {
2264 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2265 }
2266
2267 /* Finally we can generate the output section. */
2268
2269 static void
2270 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2271 {
2272 bfd_byte *buffer;
2273 asection *asec;
2274 unsigned i;
2275 unsigned num_entries;
2276 bfd_size_type length;
2277
2278 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2279 if (asec == NULL)
2280 return;
2281
2282 if (!apuinfo_set)
2283 return;
2284
2285 length = asec->size;
2286 if (length < 20)
2287 return;
2288
2289 buffer = bfd_malloc (length);
2290 if (buffer == NULL)
2291 {
2292 (*_bfd_error_handler)
2293 (_("failed to allocate space for new APUinfo section."));
2294 return;
2295 }
2296
2297 /* Create the apuinfo header. */
2298 num_entries = apuinfo_list_length ();
2299 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2300 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2301 bfd_put_32 (abfd, 0x2, buffer + 8);
2302 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2303
2304 length = 20;
2305 for (i = 0; i < num_entries; i++)
2306 {
2307 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2308 length += 4;
2309 }
2310
2311 if (length != asec->size)
2312 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2313
2314 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2315 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2316
2317 free (buffer);
2318
2319 apuinfo_list_finish ();
2320 }
2321 \f
2322 static bfd_boolean
2323 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2324 {
2325 bfd_byte buf[GLINK_ENTRY_SIZE];
2326
2327 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2328 return FALSE;
2329
2330 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2331 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2332 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2333 && bfd_get_32 (abfd, buf + 12) == BCTR);
2334 }
2335
2336 static bfd_boolean
2337 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2338 {
2339 bfd_vma vma = *(bfd_vma *) ptr;
2340 return ((section->flags & SEC_ALLOC) != 0
2341 && section->vma <= vma
2342 && vma < section->vma + section->size);
2343 }
2344
2345 static long
2346 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2347 long dynsymcount, asymbol **dynsyms,
2348 asymbol **ret)
2349 {
2350 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2351 asection *plt, *relplt, *dynamic, *glink;
2352 bfd_vma glink_vma = 0;
2353 bfd_vma resolv_vma = 0;
2354 bfd_vma stub_vma;
2355 asymbol *s;
2356 arelent *p;
2357 long count, i;
2358 size_t size;
2359 char *names;
2360 bfd_byte buf[4];
2361
2362 *ret = NULL;
2363
2364 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2365 return 0;
2366
2367 if (dynsymcount <= 0)
2368 return 0;
2369
2370 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2371 if (relplt == NULL)
2372 return 0;
2373
2374 plt = bfd_get_section_by_name (abfd, ".plt");
2375 if (plt == NULL)
2376 return 0;
2377
2378 /* Call common code to handle old-style executable PLTs. */
2379 if (elf_section_flags (plt) & SHF_EXECINSTR)
2380 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2381 dynsymcount, dynsyms, ret);
2382
2383 /* If this object was prelinked, the prelinker stored the address
2384 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2385 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2386 if (dynamic != NULL)
2387 {
2388 bfd_byte *dynbuf, *extdyn, *extdynend;
2389 size_t extdynsize;
2390 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2391
2392 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2393 return -1;
2394
2395 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2396 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2397
2398 extdyn = dynbuf;
2399 extdynend = extdyn + dynamic->size;
2400 for (; extdyn < extdynend; extdyn += extdynsize)
2401 {
2402 Elf_Internal_Dyn dyn;
2403 (*swap_dyn_in) (abfd, extdyn, &dyn);
2404
2405 if (dyn.d_tag == DT_NULL)
2406 break;
2407
2408 if (dyn.d_tag == DT_PPC_GOT)
2409 {
2410 unsigned int g_o_t = dyn.d_un.d_val;
2411 asection *got = bfd_get_section_by_name (abfd, ".got");
2412 if (got != NULL
2413 && bfd_get_section_contents (abfd, got, buf,
2414 g_o_t - got->vma + 4, 4))
2415 glink_vma = bfd_get_32 (abfd, buf);
2416 break;
2417 }
2418 }
2419 free (dynbuf);
2420 }
2421
2422 /* Otherwise we read the first plt entry. */
2423 if (glink_vma == 0)
2424 {
2425 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2426 glink_vma = bfd_get_32 (abfd, buf);
2427 }
2428
2429 if (glink_vma == 0)
2430 return 0;
2431
2432 /* The .glink section usually does not survive the final
2433 link; search for the section (usually .text) where the
2434 glink stubs now reside. */
2435 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2436 if (glink == NULL)
2437 return 0;
2438
2439 /* Determine glink PLT resolver by reading the relative branch
2440 from the first glink stub. */
2441 if (bfd_get_section_contents (abfd, glink, buf,
2442 glink_vma - glink->vma, 4))
2443 {
2444 unsigned int insn = bfd_get_32 (abfd, buf);
2445
2446 /* The first glink stub may either branch to the resolver ... */
2447 insn ^= B;
2448 if ((insn & ~0x3fffffc) == 0)
2449 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2450
2451 /* ... or fall through a bunch of NOPs. */
2452 else if ((insn ^ B ^ NOP) == 0)
2453 for (i = 4;
2454 bfd_get_section_contents (abfd, glink, buf,
2455 glink_vma - glink->vma + i, 4);
2456 i += 4)
2457 if (bfd_get_32 (abfd, buf) != NOP)
2458 {
2459 resolv_vma = glink_vma + i;
2460 break;
2461 }
2462 }
2463
2464 count = relplt->size / sizeof (Elf32_External_Rela);
2465 stub_vma = glink_vma - (bfd_vma) count * 16;
2466 /* If the stubs are those for -shared/-pie then we might have
2467 multiple stubs for each plt entry. If that is the case then
2468 there is no way to associate stubs with their plt entries short
2469 of figuring out the GOT pointer value used in the stub. */
2470 if (!is_nonpic_glink_stub (abfd, glink,
2471 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2472 return 0;
2473
2474 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2475 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2476 return -1;
2477
2478 size = count * sizeof (asymbol);
2479 p = relplt->relocation;
2480 for (i = 0; i < count; i++, p++)
2481 {
2482 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2483 if (p->addend != 0)
2484 size += sizeof ("+0x") - 1 + 8;
2485 }
2486
2487 size += sizeof (asymbol) + sizeof ("__glink");
2488
2489 if (resolv_vma)
2490 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2491
2492 s = *ret = bfd_malloc (size);
2493 if (s == NULL)
2494 return -1;
2495
2496 names = (char *) (s + count + 1 + (resolv_vma != 0));
2497 p = relplt->relocation;
2498 for (i = 0; i < count; i++, p++)
2499 {
2500 size_t len;
2501
2502 *s = **p->sym_ptr_ptr;
2503 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2504 we are defining a symbol, ensure one of them is set. */
2505 if ((s->flags & BSF_LOCAL) == 0)
2506 s->flags |= BSF_GLOBAL;
2507 s->flags |= BSF_SYNTHETIC;
2508 s->section = glink;
2509 s->value = stub_vma - glink->vma;
2510 s->name = names;
2511 s->udata.p = NULL;
2512 len = strlen ((*p->sym_ptr_ptr)->name);
2513 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2514 names += len;
2515 if (p->addend != 0)
2516 {
2517 memcpy (names, "+0x", sizeof ("+0x") - 1);
2518 names += sizeof ("+0x") - 1;
2519 bfd_sprintf_vma (abfd, names, p->addend);
2520 names += strlen (names);
2521 }
2522 memcpy (names, "@plt", sizeof ("@plt"));
2523 names += sizeof ("@plt");
2524 ++s;
2525 stub_vma += 16;
2526 }
2527
2528 /* Add a symbol at the start of the glink branch table. */
2529 memset (s, 0, sizeof *s);
2530 s->the_bfd = abfd;
2531 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2532 s->section = glink;
2533 s->value = glink_vma - glink->vma;
2534 s->name = names;
2535 memcpy (names, "__glink", sizeof ("__glink"));
2536 names += sizeof ("__glink");
2537 s++;
2538 count++;
2539
2540 if (resolv_vma)
2541 {
2542 /* Add a symbol for the glink PLT resolver. */
2543 memset (s, 0, sizeof *s);
2544 s->the_bfd = abfd;
2545 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2546 s->section = glink;
2547 s->value = resolv_vma - glink->vma;
2548 s->name = names;
2549 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2550 names += sizeof ("__glink_PLTresolve");
2551 s++;
2552 count++;
2553 }
2554
2555 return count;
2556 }
2557 \f
2558 /* The following functions are specific to the ELF linker, while
2559 functions above are used generally. They appear in this file more
2560 or less in the order in which they are called. eg.
2561 ppc_elf_check_relocs is called early in the link process,
2562 ppc_elf_finish_dynamic_sections is one of the last functions
2563 called. */
2564
2565 /* Track PLT entries needed for a given symbol. We might need more
2566 than one glink entry per symbol when generating a pic binary. */
2567 struct plt_entry
2568 {
2569 struct plt_entry *next;
2570
2571 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2572 This field stores the offset into .got2 used to initialise the
2573 GOT pointer reg. It will always be at least 32768. (Current
2574 gcc always uses an offset of 32768, but ld -r will pack .got2
2575 sections together resulting in larger offsets). */
2576 bfd_vma addend;
2577
2578 /* The .got2 section. */
2579 asection *sec;
2580
2581 /* PLT refcount or offset. */
2582 union
2583 {
2584 bfd_signed_vma refcount;
2585 bfd_vma offset;
2586 } plt;
2587
2588 /* .glink stub offset. */
2589 bfd_vma glink_offset;
2590 };
2591
2592 /* Of those relocs that might be copied as dynamic relocs, this function
2593 selects those that must be copied when linking a shared library,
2594 even when the symbol is local. */
2595
2596 static int
2597 must_be_dyn_reloc (struct bfd_link_info *info,
2598 enum elf_ppc_reloc_type r_type)
2599 {
2600 switch (r_type)
2601 {
2602 default:
2603 return 1;
2604
2605 case R_PPC_REL24:
2606 case R_PPC_REL14:
2607 case R_PPC_REL14_BRTAKEN:
2608 case R_PPC_REL14_BRNTAKEN:
2609 case R_PPC_REL32:
2610 return 0;
2611
2612 case R_PPC_TPREL32:
2613 case R_PPC_TPREL16:
2614 case R_PPC_TPREL16_LO:
2615 case R_PPC_TPREL16_HI:
2616 case R_PPC_TPREL16_HA:
2617 return !info->executable;
2618 }
2619 }
2620
2621 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2622 copying dynamic variables from a shared lib into an app's dynbss
2623 section, and instead use a dynamic relocation to point into the
2624 shared lib. */
2625 #define ELIMINATE_COPY_RELOCS 1
2626
2627 /* PPC ELF linker hash entry. */
2628
2629 struct ppc_elf_link_hash_entry
2630 {
2631 struct elf_link_hash_entry elf;
2632
2633 /* If this symbol is used in the linker created sections, the processor
2634 specific backend uses this field to map the field into the offset
2635 from the beginning of the section. */
2636 elf_linker_section_pointers_t *linker_section_pointer;
2637
2638 /* Track dynamic relocs copied for this symbol. */
2639 struct elf_dyn_relocs *dyn_relocs;
2640
2641 /* Contexts in which symbol is used in the GOT (or TOC).
2642 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2643 corresponding relocs are encountered during check_relocs.
2644 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2645 indicate the corresponding GOT entry type is not needed. */
2646 #define TLS_GD 1 /* GD reloc. */
2647 #define TLS_LD 2 /* LD reloc. */
2648 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2649 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2650 #define TLS_TLS 16 /* Any TLS reloc. */
2651 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2652 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
2653 char tls_mask;
2654
2655 /* Nonzero if we have seen a small data relocation referring to this
2656 symbol. */
2657 unsigned char has_sda_refs;
2658 };
2659
2660 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2661
2662 /* PPC ELF linker hash table. */
2663
2664 struct ppc_elf_link_hash_table
2665 {
2666 struct elf_link_hash_table elf;
2667
2668 /* Short-cuts to get to dynamic linker sections. */
2669 asection *got;
2670 asection *relgot;
2671 asection *glink;
2672 asection *plt;
2673 asection *relplt;
2674 asection *iplt;
2675 asection *reliplt;
2676 asection *dynbss;
2677 asection *relbss;
2678 asection *dynsbss;
2679 asection *relsbss;
2680 elf_linker_section_t sdata[2];
2681 asection *sbss;
2682
2683 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2684 asection *srelplt2;
2685
2686 /* The .got.plt section (VxWorks only)*/
2687 asection *sgotplt;
2688
2689 /* Shortcut to __tls_get_addr. */
2690 struct elf_link_hash_entry *tls_get_addr;
2691
2692 /* The bfd that forced an old-style PLT. */
2693 bfd *old_bfd;
2694
2695 /* TLS local dynamic got entry handling. */
2696 union {
2697 bfd_signed_vma refcount;
2698 bfd_vma offset;
2699 } tlsld_got;
2700
2701 /* Offset of branch table to PltResolve function in glink. */
2702 bfd_vma glink_pltresolve;
2703
2704 /* Size of reserved GOT entries. */
2705 unsigned int got_header_size;
2706 /* Non-zero if allocating the header left a gap. */
2707 unsigned int got_gap;
2708
2709 /* The type of PLT we have chosen to use. */
2710 enum ppc_elf_plt_type plt_type;
2711
2712 /* Set if we should emit symbols for stubs. */
2713 unsigned int emit_stub_syms:1;
2714
2715 /* Set if __tls_get_addr optimization should not be done. */
2716 unsigned int no_tls_get_addr_opt:1;
2717
2718 /* True if the target system is VxWorks. */
2719 unsigned int is_vxworks:1;
2720
2721 /* The size of PLT entries. */
2722 int plt_entry_size;
2723 /* The distance between adjacent PLT slots. */
2724 int plt_slot_size;
2725 /* The size of the first PLT entry. */
2726 int plt_initial_entry_size;
2727
2728 /* Small local sym cache. */
2729 struct sym_cache sym_cache;
2730 };
2731
2732 /* Rename some of the generic section flags to better document how they
2733 are used here. */
2734
2735 /* Nonzero if this section has TLS related relocations. */
2736 #define has_tls_reloc sec_flg0
2737
2738 /* Nonzero if this section has a call to __tls_get_addr. */
2739 #define has_tls_get_addr_call sec_flg1
2740
2741 /* Get the PPC ELF linker hash table from a link_info structure. */
2742
2743 #define ppc_elf_hash_table(p) \
2744 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
2745 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
2746
2747 /* Create an entry in a PPC ELF linker hash table. */
2748
2749 static struct bfd_hash_entry *
2750 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2751 struct bfd_hash_table *table,
2752 const char *string)
2753 {
2754 /* Allocate the structure if it has not already been allocated by a
2755 subclass. */
2756 if (entry == NULL)
2757 {
2758 entry = bfd_hash_allocate (table,
2759 sizeof (struct ppc_elf_link_hash_entry));
2760 if (entry == NULL)
2761 return entry;
2762 }
2763
2764 /* Call the allocation method of the superclass. */
2765 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2766 if (entry != NULL)
2767 {
2768 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2769 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2770 ppc_elf_hash_entry (entry)->tls_mask = 0;
2771 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
2772 }
2773
2774 return entry;
2775 }
2776
2777 /* Create a PPC ELF linker hash table. */
2778
2779 static struct bfd_link_hash_table *
2780 ppc_elf_link_hash_table_create (bfd *abfd)
2781 {
2782 struct ppc_elf_link_hash_table *ret;
2783
2784 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2785 if (ret == NULL)
2786 return NULL;
2787
2788 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2789 ppc_elf_link_hash_newfunc,
2790 sizeof (struct ppc_elf_link_hash_entry),
2791 PPC32_ELF_DATA))
2792 {
2793 free (ret);
2794 return NULL;
2795 }
2796
2797 ret->elf.init_plt_refcount.refcount = 0;
2798 ret->elf.init_plt_refcount.glist = NULL;
2799 ret->elf.init_plt_offset.offset = 0;
2800 ret->elf.init_plt_offset.glist = NULL;
2801
2802 ret->sdata[0].name = ".sdata";
2803 ret->sdata[0].sym_name = "_SDA_BASE_";
2804 ret->sdata[0].bss_name = ".sbss";
2805
2806 ret->sdata[1].name = ".sdata2";
2807 ret->sdata[1].sym_name = "_SDA2_BASE_";
2808 ret->sdata[1].bss_name = ".sbss2";
2809
2810 ret->plt_entry_size = 12;
2811 ret->plt_slot_size = 8;
2812 ret->plt_initial_entry_size = 72;
2813
2814 return &ret->elf.root;
2815 }
2816
2817 /* Create .got and the related sections. */
2818
2819 static bfd_boolean
2820 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2821 {
2822 struct ppc_elf_link_hash_table *htab;
2823 asection *s;
2824 flagword flags;
2825
2826 if (!_bfd_elf_create_got_section (abfd, info))
2827 return FALSE;
2828
2829 htab = ppc_elf_hash_table (info);
2830 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2831 if (s == NULL)
2832 abort ();
2833
2834 if (htab->is_vxworks)
2835 {
2836 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2837 if (!htab->sgotplt)
2838 abort ();
2839 }
2840 else
2841 {
2842 /* The powerpc .got has a blrl instruction in it. Mark it
2843 executable. */
2844 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2845 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2846 if (!bfd_set_section_flags (abfd, s, flags))
2847 return FALSE;
2848 }
2849
2850 htab->relgot = bfd_get_section_by_name (abfd, ".rela.got");
2851 if (!htab->relgot)
2852 abort ();
2853
2854 return TRUE;
2855 }
2856
2857 static bfd_boolean
2858 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
2859 {
2860 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2861 asection *s;
2862 flagword flags;
2863
2864 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
2865 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2866 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
2867 htab->glink = s;
2868 if (s == NULL
2869 || !bfd_set_section_alignment (abfd, s, 4))
2870 return FALSE;
2871
2872 flags = SEC_ALLOC | SEC_LINKER_CREATED;
2873 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
2874 htab->iplt = s;
2875 if (s == NULL
2876 || !bfd_set_section_alignment (abfd, s, 4))
2877 return FALSE;
2878
2879 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2880 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2881 s = bfd_make_section_with_flags (abfd, ".rela.iplt", flags);
2882 htab->reliplt = s;
2883 if (s == NULL
2884 || ! bfd_set_section_alignment (abfd, s, 2))
2885 return FALSE;
2886 return TRUE;
2887 }
2888
2889 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2890 to output sections (just like _bfd_elf_create_dynamic_sections has
2891 to create .dynbss and .rela.bss). */
2892
2893 static bfd_boolean
2894 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2895 {
2896 struct ppc_elf_link_hash_table *htab;
2897 asection *s;
2898 flagword flags;
2899
2900 htab = ppc_elf_hash_table (info);
2901
2902 if (htab->got == NULL
2903 && !ppc_elf_create_got (abfd, info))
2904 return FALSE;
2905
2906 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2907 return FALSE;
2908
2909 if (htab->glink == NULL
2910 && !ppc_elf_create_glink (abfd, info))
2911 return FALSE;
2912
2913 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2914 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2915 SEC_ALLOC | SEC_LINKER_CREATED);
2916 htab->dynsbss = s;
2917 if (s == NULL)
2918 return FALSE;
2919
2920 if (! info->shared)
2921 {
2922 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2923 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2924 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2925 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2926 htab->relsbss = s;
2927 if (s == NULL
2928 || ! bfd_set_section_alignment (abfd, s, 2))
2929 return FALSE;
2930 }
2931
2932 if (htab->is_vxworks
2933 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2934 return FALSE;
2935
2936 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2937 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2938 if (s == NULL)
2939 abort ();
2940
2941 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2942 if (htab->plt_type == PLT_VXWORKS)
2943 /* The VxWorks PLT is a loaded section with contents. */
2944 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2945 return bfd_set_section_flags (abfd, s, flags);
2946 }
2947
2948 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2949
2950 static void
2951 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2952 struct elf_link_hash_entry *dir,
2953 struct elf_link_hash_entry *ind)
2954 {
2955 struct ppc_elf_link_hash_entry *edir, *eind;
2956
2957 edir = (struct ppc_elf_link_hash_entry *) dir;
2958 eind = (struct ppc_elf_link_hash_entry *) ind;
2959
2960 if (eind->dyn_relocs != NULL)
2961 {
2962 if (edir->dyn_relocs != NULL)
2963 {
2964 struct elf_dyn_relocs **pp;
2965 struct elf_dyn_relocs *p;
2966
2967 /* Add reloc counts against the indirect sym to the direct sym
2968 list. Merge any entries against the same section. */
2969 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2970 {
2971 struct elf_dyn_relocs *q;
2972
2973 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2974 if (q->sec == p->sec)
2975 {
2976 q->pc_count += p->pc_count;
2977 q->count += p->count;
2978 *pp = p->next;
2979 break;
2980 }
2981 if (q == NULL)
2982 pp = &p->next;
2983 }
2984 *pp = edir->dyn_relocs;
2985 }
2986
2987 edir->dyn_relocs = eind->dyn_relocs;
2988 eind->dyn_relocs = NULL;
2989 }
2990
2991 edir->tls_mask |= eind->tls_mask;
2992 edir->has_sda_refs |= eind->has_sda_refs;
2993
2994 /* If called to transfer flags for a weakdef during processing
2995 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2996 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2997 if (!(ELIMINATE_COPY_RELOCS
2998 && eind->elf.root.type != bfd_link_hash_indirect
2999 && edir->elf.dynamic_adjusted))
3000 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3001
3002 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3003 edir->elf.ref_regular |= eind->elf.ref_regular;
3004 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3005 edir->elf.needs_plt |= eind->elf.needs_plt;
3006 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3007
3008 /* If we were called to copy over info for a weak sym, that's all. */
3009 if (eind->elf.root.type != bfd_link_hash_indirect)
3010 return;
3011
3012 /* Copy over the GOT refcount entries that we may have already seen to
3013 the symbol which just became indirect. */
3014 edir->elf.got.refcount += eind->elf.got.refcount;
3015 eind->elf.got.refcount = 0;
3016
3017 /* And plt entries. */
3018 if (eind->elf.plt.plist != NULL)
3019 {
3020 if (edir->elf.plt.plist != NULL)
3021 {
3022 struct plt_entry **entp;
3023 struct plt_entry *ent;
3024
3025 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3026 {
3027 struct plt_entry *dent;
3028
3029 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3030 if (dent->sec == ent->sec && dent->addend == ent->addend)
3031 {
3032 dent->plt.refcount += ent->plt.refcount;
3033 *entp = ent->next;
3034 break;
3035 }
3036 if (dent == NULL)
3037 entp = &ent->next;
3038 }
3039 *entp = edir->elf.plt.plist;
3040 }
3041
3042 edir->elf.plt.plist = eind->elf.plt.plist;
3043 eind->elf.plt.plist = NULL;
3044 }
3045
3046 if (eind->elf.dynindx != -1)
3047 {
3048 if (edir->elf.dynindx != -1)
3049 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3050 edir->elf.dynstr_index);
3051 edir->elf.dynindx = eind->elf.dynindx;
3052 edir->elf.dynstr_index = eind->elf.dynstr_index;
3053 eind->elf.dynindx = -1;
3054 eind->elf.dynstr_index = 0;
3055 }
3056 }
3057
3058 /* Hook called by the linker routine which adds symbols from an object
3059 file. We use it to put .comm items in .sbss, and not .bss. */
3060
3061 static bfd_boolean
3062 ppc_elf_add_symbol_hook (bfd *abfd,
3063 struct bfd_link_info *info,
3064 Elf_Internal_Sym *sym,
3065 const char **namep ATTRIBUTE_UNUSED,
3066 flagword *flagsp ATTRIBUTE_UNUSED,
3067 asection **secp,
3068 bfd_vma *valp)
3069 {
3070 if (sym->st_shndx == SHN_COMMON
3071 && !info->relocatable
3072 && is_ppc_elf (info->output_bfd)
3073 && sym->st_size <= elf_gp_size (abfd))
3074 {
3075 /* Common symbols less than or equal to -G nn bytes are automatically
3076 put into .sbss. */
3077 struct ppc_elf_link_hash_table *htab;
3078
3079 htab = ppc_elf_hash_table (info);
3080 if (htab->sbss == NULL)
3081 {
3082 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3083
3084 if (!htab->elf.dynobj)
3085 htab->elf.dynobj = abfd;
3086
3087 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3088 ".sbss",
3089 flags);
3090 if (htab->sbss == NULL)
3091 return FALSE;
3092 }
3093
3094 *secp = htab->sbss;
3095 *valp = sym->st_size;
3096 }
3097
3098 if ((abfd->flags & DYNAMIC) == 0
3099 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3100 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3101 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3102
3103 return TRUE;
3104 }
3105 \f
3106 static bfd_boolean
3107 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3108 {
3109 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3110
3111 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3112 TRUE, FALSE, TRUE);
3113 if (lsect->sym == NULL)
3114 return FALSE;
3115 if (lsect->sym->root.type == bfd_link_hash_new)
3116 lsect->sym->non_elf = 0;
3117 lsect->sym->ref_regular = 1;
3118 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3119 return TRUE;
3120 }
3121
3122 /* Create a special linker section. */
3123
3124 static bfd_boolean
3125 ppc_elf_create_linker_section (bfd *abfd,
3126 struct bfd_link_info *info,
3127 flagword flags,
3128 elf_linker_section_t *lsect)
3129 {
3130 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3131 asection *s;
3132
3133 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3134 | SEC_LINKER_CREATED);
3135
3136 /* Record the first bfd that needs the special sections. */
3137 if (!htab->elf.dynobj)
3138 htab->elf.dynobj = abfd;
3139
3140 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3141 lsect->name,
3142 flags);
3143 if (s == NULL
3144 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3145 return FALSE;
3146 lsect->section = s;
3147
3148 return create_sdata_sym (info, lsect);
3149 }
3150
3151 /* Find a linker generated pointer with a given addend and type. */
3152
3153 static elf_linker_section_pointers_t *
3154 elf_find_pointer_linker_section
3155 (elf_linker_section_pointers_t *linker_pointers,
3156 bfd_vma addend,
3157 elf_linker_section_t *lsect)
3158 {
3159 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3160 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3161 return linker_pointers;
3162
3163 return NULL;
3164 }
3165
3166 /* Allocate a pointer to live in a linker created section. */
3167
3168 static bfd_boolean
3169 elf_create_pointer_linker_section (bfd *abfd,
3170 elf_linker_section_t *lsect,
3171 struct elf_link_hash_entry *h,
3172 const Elf_Internal_Rela *rel)
3173 {
3174 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3175 elf_linker_section_pointers_t *linker_section_ptr;
3176 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3177 bfd_size_type amt;
3178
3179 BFD_ASSERT (lsect != NULL);
3180
3181 /* Is this a global symbol? */
3182 if (h != NULL)
3183 {
3184 struct ppc_elf_link_hash_entry *eh;
3185
3186 /* Has this symbol already been allocated? If so, our work is done. */
3187 eh = (struct ppc_elf_link_hash_entry *) h;
3188 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3189 rel->r_addend,
3190 lsect))
3191 return TRUE;
3192
3193 ptr_linker_section_ptr = &eh->linker_section_pointer;
3194 }
3195 else
3196 {
3197 BFD_ASSERT (is_ppc_elf (abfd));
3198
3199 /* Allocation of a pointer to a local symbol. */
3200 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3201
3202 /* Allocate a table to hold the local symbols if first time. */
3203 if (!ptr)
3204 {
3205 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3206
3207 amt = num_symbols;
3208 amt *= sizeof (elf_linker_section_pointers_t *);
3209 ptr = bfd_zalloc (abfd, amt);
3210
3211 if (!ptr)
3212 return FALSE;
3213
3214 elf_local_ptr_offsets (abfd) = ptr;
3215 }
3216
3217 /* Has this symbol already been allocated? If so, our work is done. */
3218 if (elf_find_pointer_linker_section (ptr[r_symndx],
3219 rel->r_addend,
3220 lsect))
3221 return TRUE;
3222
3223 ptr_linker_section_ptr = &ptr[r_symndx];
3224 }
3225
3226 /* Allocate space for a pointer in the linker section, and allocate
3227 a new pointer record from internal memory. */
3228 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3229 amt = sizeof (elf_linker_section_pointers_t);
3230 linker_section_ptr = bfd_alloc (abfd, amt);
3231
3232 if (!linker_section_ptr)
3233 return FALSE;
3234
3235 linker_section_ptr->next = *ptr_linker_section_ptr;
3236 linker_section_ptr->addend = rel->r_addend;
3237 linker_section_ptr->lsect = lsect;
3238 *ptr_linker_section_ptr = linker_section_ptr;
3239
3240 linker_section_ptr->offset = lsect->section->size;
3241 lsect->section->size += 4;
3242
3243 #ifdef DEBUG
3244 fprintf (stderr,
3245 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3246 lsect->name, (long) linker_section_ptr->offset,
3247 (long) lsect->section->size);
3248 #endif
3249
3250 return TRUE;
3251 }
3252
3253 static struct plt_entry **
3254 update_local_sym_info (bfd *abfd,
3255 Elf_Internal_Shdr *symtab_hdr,
3256 unsigned long r_symndx,
3257 int tls_type)
3258 {
3259 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3260 struct plt_entry **local_plt;
3261 char *local_got_tls_masks;
3262
3263 if (local_got_refcounts == NULL)
3264 {
3265 bfd_size_type size = symtab_hdr->sh_info;
3266
3267 size *= (sizeof (*local_got_refcounts)
3268 + sizeof (*local_plt)
3269 + sizeof (*local_got_tls_masks));
3270 local_got_refcounts = bfd_zalloc (abfd, size);
3271 if (local_got_refcounts == NULL)
3272 return NULL;
3273 elf_local_got_refcounts (abfd) = local_got_refcounts;
3274 }
3275
3276 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3277 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3278 local_got_tls_masks[r_symndx] |= tls_type;
3279 if (tls_type != PLT_IFUNC)
3280 local_got_refcounts[r_symndx] += 1;
3281 return local_plt + r_symndx;
3282 }
3283
3284 static bfd_boolean
3285 update_plt_info (bfd *abfd, struct plt_entry **plist,
3286 asection *sec, bfd_vma addend)
3287 {
3288 struct plt_entry *ent;
3289
3290 if (addend < 32768)
3291 sec = NULL;
3292 for (ent = *plist; ent != NULL; ent = ent->next)
3293 if (ent->sec == sec && ent->addend == addend)
3294 break;
3295 if (ent == NULL)
3296 {
3297 bfd_size_type amt = sizeof (*ent);
3298 ent = bfd_alloc (abfd, amt);
3299 if (ent == NULL)
3300 return FALSE;
3301 ent->next = *plist;
3302 ent->sec = sec;
3303 ent->addend = addend;
3304 ent->plt.refcount = 0;
3305 *plist = ent;
3306 }
3307 ent->plt.refcount += 1;
3308 return TRUE;
3309 }
3310
3311 static struct plt_entry *
3312 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3313 {
3314 struct plt_entry *ent;
3315
3316 if (addend < 32768)
3317 sec = NULL;
3318 for (ent = *plist; ent != NULL; ent = ent->next)
3319 if (ent->sec == sec && ent->addend == addend)
3320 break;
3321 return ent;
3322 }
3323
3324 static bfd_boolean
3325 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3326 {
3327 return (r_type == R_PPC_PLTREL24
3328 || r_type == R_PPC_LOCAL24PC
3329 || r_type == R_PPC_REL24
3330 || r_type == R_PPC_REL14
3331 || r_type == R_PPC_REL14_BRTAKEN
3332 || r_type == R_PPC_REL14_BRNTAKEN
3333 || r_type == R_PPC_ADDR24
3334 || r_type == R_PPC_ADDR14
3335 || r_type == R_PPC_ADDR14_BRTAKEN
3336 || r_type == R_PPC_ADDR14_BRNTAKEN);
3337 }
3338
3339 static void
3340 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3341 {
3342 (*_bfd_error_handler)
3343 (_("%B: relocation %s cannot be used when making a shared object"),
3344 abfd,
3345 ppc_elf_howto_table[r_type]->name);
3346 bfd_set_error (bfd_error_bad_value);
3347 }
3348
3349 /* Look through the relocs for a section during the first phase, and
3350 allocate space in the global offset table or procedure linkage
3351 table. */
3352
3353 static bfd_boolean
3354 ppc_elf_check_relocs (bfd *abfd,
3355 struct bfd_link_info *info,
3356 asection *sec,
3357 const Elf_Internal_Rela *relocs)
3358 {
3359 struct ppc_elf_link_hash_table *htab;
3360 Elf_Internal_Shdr *symtab_hdr;
3361 struct elf_link_hash_entry **sym_hashes;
3362 const Elf_Internal_Rela *rel;
3363 const Elf_Internal_Rela *rel_end;
3364 asection *got2, *sreloc;
3365 struct elf_link_hash_entry *tga;
3366
3367 if (info->relocatable)
3368 return TRUE;
3369
3370 /* Don't do anything special with non-loaded, non-alloced sections.
3371 In particular, any relocs in such sections should not affect GOT
3372 and PLT reference counting (ie. we don't allow them to create GOT
3373 or PLT entries), there's no possibility or desire to optimize TLS
3374 relocs, and there's not much point in propagating relocs to shared
3375 libs that the dynamic linker won't relocate. */
3376 if ((sec->flags & SEC_ALLOC) == 0)
3377 return TRUE;
3378
3379 #ifdef DEBUG
3380 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3381 sec, abfd);
3382 #endif
3383
3384 BFD_ASSERT (is_ppc_elf (abfd));
3385
3386 /* Initialize howto table if not already done. */
3387 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3388 ppc_elf_howto_init ();
3389
3390 htab = ppc_elf_hash_table (info);
3391 if (htab->glink == NULL)
3392 {
3393 if (htab->elf.dynobj == NULL)
3394 htab->elf.dynobj = abfd;
3395 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3396 return FALSE;
3397 }
3398 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3399 FALSE, FALSE, TRUE);
3400 symtab_hdr = &elf_symtab_hdr (abfd);
3401 sym_hashes = elf_sym_hashes (abfd);
3402 got2 = bfd_get_section_by_name (abfd, ".got2");
3403 sreloc = NULL;
3404
3405 rel_end = relocs + sec->reloc_count;
3406 for (rel = relocs; rel < rel_end; rel++)
3407 {
3408 unsigned long r_symndx;
3409 enum elf_ppc_reloc_type r_type;
3410 struct elf_link_hash_entry *h;
3411 int tls_type;
3412
3413 r_symndx = ELF32_R_SYM (rel->r_info);
3414 if (r_symndx < symtab_hdr->sh_info)
3415 h = NULL;
3416 else
3417 {
3418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3419 while (h->root.type == bfd_link_hash_indirect
3420 || h->root.type == bfd_link_hash_warning)
3421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3422 }
3423
3424 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3425 This shows up in particular in an R_PPC_ADDR32 in the eabi
3426 startup code. */
3427 if (h != NULL
3428 && htab->got == NULL
3429 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3430 {
3431 if (htab->elf.dynobj == NULL)
3432 htab->elf.dynobj = abfd;
3433 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3434 return FALSE;
3435 BFD_ASSERT (h == htab->elf.hgot);
3436 }
3437
3438 tls_type = 0;
3439 r_type = ELF32_R_TYPE (rel->r_info);
3440 if (h == NULL && !htab->is_vxworks)
3441 {
3442 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3443 abfd, r_symndx);
3444 if (isym == NULL)
3445 return FALSE;
3446
3447 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3448 && (!info->shared
3449 || is_branch_reloc (r_type)))
3450 {
3451 struct plt_entry **ifunc;
3452 bfd_vma addend;
3453
3454 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3455 PLT_IFUNC);
3456 if (ifunc == NULL)
3457 return FALSE;
3458
3459 /* STT_GNU_IFUNC symbols must have a PLT entry;
3460 In a non-pie executable even when there are
3461 no plt calls. */
3462 addend = 0;
3463 if (r_type == R_PPC_PLTREL24)
3464 {
3465 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3466 if (info->shared)
3467 addend = rel->r_addend;
3468 }
3469 if (!update_plt_info (abfd, ifunc, got2, addend))
3470 return FALSE;
3471 }
3472 }
3473
3474 if (!htab->is_vxworks
3475 && is_branch_reloc (r_type)
3476 && h != NULL
3477 && h == tga)
3478 {
3479 if (rel != relocs
3480 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3481 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3482 /* We have a new-style __tls_get_addr call with a marker
3483 reloc. */
3484 ;
3485 else
3486 /* Mark this section as having an old-style call. */
3487 sec->has_tls_get_addr_call = 1;
3488 }
3489
3490 switch (r_type)
3491 {
3492 case R_PPC_TLSGD:
3493 case R_PPC_TLSLD:
3494 /* These special tls relocs tie a call to __tls_get_addr with
3495 its parameter symbol. */
3496 break;
3497
3498 case R_PPC_GOT_TLSLD16:
3499 case R_PPC_GOT_TLSLD16_LO:
3500 case R_PPC_GOT_TLSLD16_HI:
3501 case R_PPC_GOT_TLSLD16_HA:
3502 tls_type = TLS_TLS | TLS_LD;
3503 goto dogottls;
3504
3505 case R_PPC_GOT_TLSGD16:
3506 case R_PPC_GOT_TLSGD16_LO:
3507 case R_PPC_GOT_TLSGD16_HI:
3508 case R_PPC_GOT_TLSGD16_HA:
3509 tls_type = TLS_TLS | TLS_GD;
3510 goto dogottls;
3511
3512 case R_PPC_GOT_TPREL16:
3513 case R_PPC_GOT_TPREL16_LO:
3514 case R_PPC_GOT_TPREL16_HI:
3515 case R_PPC_GOT_TPREL16_HA:
3516 if (!info->executable)
3517 info->flags |= DF_STATIC_TLS;
3518 tls_type = TLS_TLS | TLS_TPREL;
3519 goto dogottls;
3520
3521 case R_PPC_GOT_DTPREL16:
3522 case R_PPC_GOT_DTPREL16_LO:
3523 case R_PPC_GOT_DTPREL16_HI:
3524 case R_PPC_GOT_DTPREL16_HA:
3525 tls_type = TLS_TLS | TLS_DTPREL;
3526 dogottls:
3527 sec->has_tls_reloc = 1;
3528 /* Fall thru */
3529
3530 /* GOT16 relocations */
3531 case R_PPC_GOT16:
3532 case R_PPC_GOT16_LO:
3533 case R_PPC_GOT16_HI:
3534 case R_PPC_GOT16_HA:
3535 /* This symbol requires a global offset table entry. */
3536 if (htab->got == NULL)
3537 {
3538 if (htab->elf.dynobj == NULL)
3539 htab->elf.dynobj = abfd;
3540 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3541 return FALSE;
3542 }
3543 if (h != NULL)
3544 {
3545 h->got.refcount += 1;
3546 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3547 }
3548 else
3549 /* This is a global offset table entry for a local symbol. */
3550 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3551 return FALSE;
3552
3553 /* We may also need a plt entry if the symbol turns out to be
3554 an ifunc. */
3555 if (h != NULL && !info->shared)
3556 {
3557 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3558 return FALSE;
3559 }
3560 break;
3561
3562 /* Indirect .sdata relocation. */
3563 case R_PPC_EMB_SDAI16:
3564 if (info->shared)
3565 {
3566 bad_shared_reloc (abfd, r_type);
3567 return FALSE;
3568 }
3569 if (htab->sdata[0].section == NULL
3570 && !ppc_elf_create_linker_section (abfd, info, 0,
3571 &htab->sdata[0]))
3572 return FALSE;
3573 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3574 h, rel))
3575 return FALSE;
3576 if (h != NULL)
3577 {
3578 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3579 h->non_got_ref = TRUE;
3580 }
3581 break;
3582
3583 /* Indirect .sdata2 relocation. */
3584 case R_PPC_EMB_SDA2I16:
3585 if (info->shared)
3586 {
3587 bad_shared_reloc (abfd, r_type);
3588 return FALSE;
3589 }
3590 if (htab->sdata[1].section == NULL
3591 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3592 &htab->sdata[1]))
3593 return FALSE;
3594 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3595 h, rel))
3596 return FALSE;
3597 if (h != NULL)
3598 {
3599 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3600 h->non_got_ref = TRUE;
3601 }
3602 break;
3603
3604 case R_PPC_SDAREL16:
3605 if (htab->sdata[0].sym == NULL
3606 && !create_sdata_sym (info, &htab->sdata[0]))
3607 return FALSE;
3608 if (h != NULL)
3609 {
3610 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3611 h->non_got_ref = TRUE;
3612 }
3613 break;
3614
3615 case R_PPC_EMB_SDA2REL:
3616 if (info->shared)
3617 {
3618 bad_shared_reloc (abfd, r_type);
3619 return FALSE;
3620 }
3621 if (htab->sdata[1].sym == NULL
3622 && !create_sdata_sym (info, &htab->sdata[1]))
3623 return FALSE;
3624 if (h != NULL)
3625 {
3626 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3627 h->non_got_ref = TRUE;
3628 }
3629 break;
3630
3631 case R_PPC_EMB_SDA21:
3632 case R_PPC_EMB_RELSDA:
3633 if (info->shared)
3634 {
3635 bad_shared_reloc (abfd, r_type);
3636 return FALSE;
3637 }
3638 if (htab->sdata[0].sym == NULL
3639 && !create_sdata_sym (info, &htab->sdata[0]))
3640 return FALSE;
3641 if (htab->sdata[1].sym == NULL
3642 && !create_sdata_sym (info, &htab->sdata[1]))
3643 return FALSE;
3644 if (h != NULL)
3645 {
3646 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3647 h->non_got_ref = TRUE;
3648 }
3649 break;
3650
3651 case R_PPC_EMB_NADDR32:
3652 case R_PPC_EMB_NADDR16:
3653 case R_PPC_EMB_NADDR16_LO:
3654 case R_PPC_EMB_NADDR16_HI:
3655 case R_PPC_EMB_NADDR16_HA:
3656 if (info->shared)
3657 {
3658 bad_shared_reloc (abfd, r_type);
3659 return FALSE;
3660 }
3661 if (h != NULL)
3662 h->non_got_ref = TRUE;
3663 break;
3664
3665 case R_PPC_PLTREL24:
3666 if (h == NULL)
3667 break;
3668 /* Fall through */
3669 case R_PPC_PLT32:
3670 case R_PPC_PLTREL32:
3671 case R_PPC_PLT16_LO:
3672 case R_PPC_PLT16_HI:
3673 case R_PPC_PLT16_HA:
3674 #ifdef DEBUG
3675 fprintf (stderr, "Reloc requires a PLT entry\n");
3676 #endif
3677 /* This symbol requires a procedure linkage table entry. We
3678 actually build the entry in finish_dynamic_symbol,
3679 because this might be a case of linking PIC code without
3680 linking in any dynamic objects, in which case we don't
3681 need to generate a procedure linkage table after all. */
3682
3683 if (h == NULL)
3684 {
3685 /* It does not make sense to have a procedure linkage
3686 table entry for a local symbol. */
3687 info->callbacks->einfo (_("%H: %s reloc against local symbol\n"),
3688 abfd, sec, rel->r_offset,
3689 ppc_elf_howto_table[r_type]->name);
3690 bfd_set_error (bfd_error_bad_value);
3691 return FALSE;
3692 }
3693 else
3694 {
3695 bfd_vma addend = 0;
3696
3697 if (r_type == R_PPC_PLTREL24)
3698 {
3699 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3700 if (info->shared)
3701 addend = rel->r_addend;
3702 }
3703 h->needs_plt = 1;
3704 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
3705 return FALSE;
3706 }
3707 break;
3708
3709 /* The following relocations don't need to propagate the
3710 relocation if linking a shared object since they are
3711 section relative. */
3712 case R_PPC_SECTOFF:
3713 case R_PPC_SECTOFF_LO:
3714 case R_PPC_SECTOFF_HI:
3715 case R_PPC_SECTOFF_HA:
3716 case R_PPC_DTPREL16:
3717 case R_PPC_DTPREL16_LO:
3718 case R_PPC_DTPREL16_HI:
3719 case R_PPC_DTPREL16_HA:
3720 case R_PPC_TOC16:
3721 break;
3722
3723 case R_PPC_REL16:
3724 case R_PPC_REL16_LO:
3725 case R_PPC_REL16_HI:
3726 case R_PPC_REL16_HA:
3727 ppc_elf_tdata (abfd)->has_rel16 = 1;
3728 break;
3729
3730 /* These are just markers. */
3731 case R_PPC_TLS:
3732 case R_PPC_EMB_MRKREF:
3733 case R_PPC_NONE:
3734 case R_PPC_max:
3735 case R_PPC_RELAX:
3736 case R_PPC_RELAX_PLT:
3737 case R_PPC_RELAX_PLTREL24:
3738 break;
3739
3740 /* These should only appear in dynamic objects. */
3741 case R_PPC_COPY:
3742 case R_PPC_GLOB_DAT:
3743 case R_PPC_JMP_SLOT:
3744 case R_PPC_RELATIVE:
3745 case R_PPC_IRELATIVE:
3746 break;
3747
3748 /* These aren't handled yet. We'll report an error later. */
3749 case R_PPC_ADDR30:
3750 case R_PPC_EMB_RELSEC16:
3751 case R_PPC_EMB_RELST_LO:
3752 case R_PPC_EMB_RELST_HI:
3753 case R_PPC_EMB_RELST_HA:
3754 case R_PPC_EMB_BIT_FLD:
3755 break;
3756
3757 /* This refers only to functions defined in the shared library. */
3758 case R_PPC_LOCAL24PC:
3759 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3760 {
3761 htab->plt_type = PLT_OLD;
3762 htab->old_bfd = abfd;
3763 }
3764 break;
3765
3766 /* This relocation describes the C++ object vtable hierarchy.
3767 Reconstruct it for later use during GC. */
3768 case R_PPC_GNU_VTINHERIT:
3769 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3770 return FALSE;
3771 break;
3772
3773 /* This relocation describes which C++ vtable entries are actually
3774 used. Record for later use during GC. */
3775 case R_PPC_GNU_VTENTRY:
3776 BFD_ASSERT (h != NULL);
3777 if (h != NULL
3778 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3779 return FALSE;
3780 break;
3781
3782 /* We shouldn't really be seeing these. */
3783 case R_PPC_TPREL32:
3784 case R_PPC_TPREL16:
3785 case R_PPC_TPREL16_LO:
3786 case R_PPC_TPREL16_HI:
3787 case R_PPC_TPREL16_HA:
3788 if (!info->executable)
3789 info->flags |= DF_STATIC_TLS;
3790 goto dodyn;
3791
3792 /* Nor these. */
3793 case R_PPC_DTPMOD32:
3794 case R_PPC_DTPREL32:
3795 goto dodyn;
3796
3797 case R_PPC_REL32:
3798 if (h == NULL
3799 && got2 != NULL
3800 && (sec->flags & SEC_CODE) != 0
3801 && info->shared
3802 && htab->plt_type == PLT_UNSET)
3803 {
3804 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3805 the start of a function, which assembles to a REL32
3806 reference to .got2. If we detect one of these, then
3807 force the old PLT layout because the linker cannot
3808 reliably deduce the GOT pointer value needed for
3809 PLT call stubs. */
3810 asection *s;
3811 Elf_Internal_Sym *isym;
3812
3813 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3814 abfd, r_symndx);
3815 if (isym == NULL)
3816 return FALSE;
3817
3818 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3819 if (s == got2)
3820 {
3821 htab->plt_type = PLT_OLD;
3822 htab->old_bfd = abfd;
3823 }
3824 }
3825 if (h == NULL || h == htab->elf.hgot)
3826 break;
3827 /* fall through */
3828
3829 case R_PPC_ADDR32:
3830 case R_PPC_ADDR16:
3831 case R_PPC_ADDR16_LO:
3832 case R_PPC_ADDR16_HI:
3833 case R_PPC_ADDR16_HA:
3834 case R_PPC_UADDR32:
3835 case R_PPC_UADDR16:
3836 if (h != NULL && !info->shared)
3837 {
3838 /* We may need a plt entry if the symbol turns out to be
3839 a function defined in a dynamic object. */
3840 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3841 return FALSE;
3842
3843 /* We may need a copy reloc too. */
3844 h->non_got_ref = 1;
3845 h->pointer_equality_needed = 1;
3846 }
3847 goto dodyn;
3848
3849 case R_PPC_REL24:
3850 case R_PPC_REL14:
3851 case R_PPC_REL14_BRTAKEN:
3852 case R_PPC_REL14_BRNTAKEN:
3853 if (h == NULL)
3854 break;
3855 if (h == htab->elf.hgot)
3856 {
3857 if (htab->plt_type == PLT_UNSET)
3858 {
3859 htab->plt_type = PLT_OLD;
3860 htab->old_bfd = abfd;
3861 }
3862 break;
3863 }
3864 /* fall through */
3865
3866 case R_PPC_ADDR24:
3867 case R_PPC_ADDR14:
3868 case R_PPC_ADDR14_BRTAKEN:
3869 case R_PPC_ADDR14_BRNTAKEN:
3870 if (h != NULL && !info->shared)
3871 {
3872 /* We may need a plt entry if the symbol turns out to be
3873 a function defined in a dynamic object. */
3874 h->needs_plt = 1;
3875 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3876 return FALSE;
3877 break;
3878 }
3879
3880 dodyn:
3881 /* If we are creating a shared library, and this is a reloc
3882 against a global symbol, or a non PC relative reloc
3883 against a local symbol, then we need to copy the reloc
3884 into the shared library. However, if we are linking with
3885 -Bsymbolic, we do not need to copy a reloc against a
3886 global symbol which is defined in an object we are
3887 including in the link (i.e., DEF_REGULAR is set). At
3888 this point we have not seen all the input files, so it is
3889 possible that DEF_REGULAR is not set now but will be set
3890 later (it is never cleared). In case of a weak definition,
3891 DEF_REGULAR may be cleared later by a strong definition in
3892 a shared library. We account for that possibility below by
3893 storing information in the dyn_relocs field of the hash
3894 table entry. A similar situation occurs when creating
3895 shared libraries and symbol visibility changes render the
3896 symbol local.
3897
3898 If on the other hand, we are creating an executable, we
3899 may need to keep relocations for symbols satisfied by a
3900 dynamic library if we manage to avoid copy relocs for the
3901 symbol. */
3902 if ((info->shared
3903 && (must_be_dyn_reloc (info, r_type)
3904 || (h != NULL
3905 && (! info->symbolic
3906 || h->root.type == bfd_link_hash_defweak
3907 || !h->def_regular))))
3908 || (ELIMINATE_COPY_RELOCS
3909 && !info->shared
3910 && h != NULL
3911 && (h->root.type == bfd_link_hash_defweak
3912 || !h->def_regular)))
3913 {
3914 struct elf_dyn_relocs *p;
3915 struct elf_dyn_relocs **rel_head;
3916
3917 #ifdef DEBUG
3918 fprintf (stderr,
3919 "ppc_elf_check_relocs needs to "
3920 "create relocation for %s\n",
3921 (h && h->root.root.string
3922 ? h->root.root.string : "<unknown>"));
3923 #endif
3924 if (sreloc == NULL)
3925 {
3926 if (htab->elf.dynobj == NULL)
3927 htab->elf.dynobj = abfd;
3928
3929 sreloc = _bfd_elf_make_dynamic_reloc_section
3930 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3931
3932 if (sreloc == NULL)
3933 return FALSE;
3934 }
3935
3936 /* If this is a global symbol, we count the number of
3937 relocations we need for this symbol. */
3938 if (h != NULL)
3939 {
3940 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
3941 }
3942 else
3943 {
3944 /* Track dynamic relocs needed for local syms too.
3945 We really need local syms available to do this
3946 easily. Oh well. */
3947 asection *s;
3948 void *vpp;
3949 Elf_Internal_Sym *isym;
3950
3951 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3952 abfd, r_symndx);
3953 if (isym == NULL)
3954 return FALSE;
3955
3956 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
3957 if (s == NULL)
3958 s = sec;
3959
3960 vpp = &elf_section_data (s)->local_dynrel;
3961 rel_head = (struct elf_dyn_relocs **) vpp;
3962 }
3963
3964 p = *rel_head;
3965 if (p == NULL || p->sec != sec)
3966 {
3967 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3968 if (p == NULL)
3969 return FALSE;
3970 p->next = *rel_head;
3971 *rel_head = p;
3972 p->sec = sec;
3973 p->count = 0;
3974 p->pc_count = 0;
3975 }
3976
3977 p->count += 1;
3978 if (!must_be_dyn_reloc (info, r_type))
3979 p->pc_count += 1;
3980 }
3981
3982 break;
3983 }
3984 }
3985
3986 return TRUE;
3987 }
3988 \f
3989
3990 /* Merge object attributes from IBFD into OBFD. Raise an error if
3991 there are conflicting attributes. */
3992 static bfd_boolean
3993 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3994 {
3995 obj_attribute *in_attr, *in_attrs;
3996 obj_attribute *out_attr, *out_attrs;
3997
3998 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3999 {
4000 /* This is the first object. Copy the attributes. */
4001 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4002
4003 /* Use the Tag_null value to indicate the attributes have been
4004 initialized. */
4005 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4006
4007 return TRUE;
4008 }
4009
4010 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4011 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4012
4013 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4014 non-conflicting ones. */
4015 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4016 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4017 if (in_attr->i != out_attr->i)
4018 {
4019 out_attr->type = 1;
4020 if (out_attr->i == 0)
4021 out_attr->i = in_attr->i;
4022 else if (in_attr->i == 0)
4023 ;
4024 else if (out_attr->i == 1 && in_attr->i == 2)
4025 _bfd_error_handler
4026 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4027 else if (out_attr->i == 1 && in_attr->i == 3)
4028 _bfd_error_handler
4029 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4030 obfd, ibfd);
4031 else if (out_attr->i == 3 && in_attr->i == 1)
4032 _bfd_error_handler
4033 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4034 ibfd, obfd);
4035 else if (out_attr->i == 3 && in_attr->i == 2)
4036 _bfd_error_handler
4037 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4038 ibfd, obfd);
4039 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4040 _bfd_error_handler
4041 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4042 else if (in_attr->i > 3)
4043 _bfd_error_handler
4044 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4045 in_attr->i);
4046 else
4047 _bfd_error_handler
4048 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4049 out_attr->i);
4050 }
4051
4052 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4053 merge non-conflicting ones. */
4054 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4055 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4056 if (in_attr->i != out_attr->i)
4057 {
4058 const char *in_abi = NULL, *out_abi = NULL;
4059
4060 switch (in_attr->i)
4061 {
4062 case 1: in_abi = "generic"; break;
4063 case 2: in_abi = "AltiVec"; break;
4064 case 3: in_abi = "SPE"; break;
4065 }
4066
4067 switch (out_attr->i)
4068 {
4069 case 1: out_abi = "generic"; break;
4070 case 2: out_abi = "AltiVec"; break;
4071 case 3: out_abi = "SPE"; break;
4072 }
4073
4074 out_attr->type = 1;
4075 if (out_attr->i == 0)
4076 out_attr->i = in_attr->i;
4077 else if (in_attr->i == 0)
4078 ;
4079 /* For now, allow generic to transition to AltiVec or SPE
4080 without a warning. If GCC marked files with their stack
4081 alignment and used don't-care markings for files which are
4082 not affected by the vector ABI, we could warn about this
4083 case too. */
4084 else if (out_attr->i == 1)
4085 out_attr->i = in_attr->i;
4086 else if (in_attr->i == 1)
4087 ;
4088 else if (in_abi == NULL)
4089 _bfd_error_handler
4090 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4091 in_attr->i);
4092 else if (out_abi == NULL)
4093 _bfd_error_handler
4094 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4095 in_attr->i);
4096 else
4097 _bfd_error_handler
4098 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4099 ibfd, obfd, in_abi, out_abi);
4100 }
4101
4102 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4103 and merge non-conflicting ones. */
4104 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4105 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4106 if (in_attr->i != out_attr->i)
4107 {
4108 out_attr->type = 1;
4109 if (out_attr->i == 0)
4110 out_attr->i = in_attr->i;
4111 else if (in_attr->i == 0)
4112 ;
4113 else if (out_attr->i == 1 && in_attr->i == 2)
4114 _bfd_error_handler
4115 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4116 else if (out_attr->i == 2 && in_attr->i == 1)
4117 _bfd_error_handler
4118 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4119 else if (in_attr->i > 2)
4120 _bfd_error_handler
4121 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4122 in_attr->i);
4123 else
4124 _bfd_error_handler
4125 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4126 out_attr->i);
4127 }
4128
4129 /* Merge Tag_compatibility attributes and any common GNU ones. */
4130 _bfd_elf_merge_object_attributes (ibfd, obfd);
4131
4132 return TRUE;
4133 }
4134
4135 /* Merge backend specific data from an object file to the output
4136 object file when linking. */
4137
4138 static bfd_boolean
4139 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4140 {
4141 flagword old_flags;
4142 flagword new_flags;
4143 bfd_boolean error;
4144
4145 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4146 return TRUE;
4147
4148 /* Check if we have the same endianness. */
4149 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4150 return FALSE;
4151
4152 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4153 return FALSE;
4154
4155 new_flags = elf_elfheader (ibfd)->e_flags;
4156 old_flags = elf_elfheader (obfd)->e_flags;
4157 if (!elf_flags_init (obfd))
4158 {
4159 /* First call, no flags set. */
4160 elf_flags_init (obfd) = TRUE;
4161 elf_elfheader (obfd)->e_flags = new_flags;
4162 }
4163
4164 /* Compatible flags are ok. */
4165 else if (new_flags == old_flags)
4166 ;
4167
4168 /* Incompatible flags. */
4169 else
4170 {
4171 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4172 to be linked with either. */
4173 error = FALSE;
4174 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4175 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4176 {
4177 error = TRUE;
4178 (*_bfd_error_handler)
4179 (_("%B: compiled with -mrelocatable and linked with "
4180 "modules compiled normally"), ibfd);
4181 }
4182 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4183 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4184 {
4185 error = TRUE;
4186 (*_bfd_error_handler)
4187 (_("%B: compiled normally and linked with "
4188 "modules compiled with -mrelocatable"), ibfd);
4189 }
4190
4191 /* The output is -mrelocatable-lib iff both the input files are. */
4192 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4193 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4194
4195 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4196 but each input file is either -mrelocatable or -mrelocatable-lib. */
4197 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4198 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4199 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4200 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4201
4202 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4203 any module uses it. */
4204 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4205
4206 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4207 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4208
4209 /* Warn about any other mismatches. */
4210 if (new_flags != old_flags)
4211 {
4212 error = TRUE;
4213 (*_bfd_error_handler)
4214 (_("%B: uses different e_flags (0x%lx) fields "
4215 "than previous modules (0x%lx)"),
4216 ibfd, (long) new_flags, (long) old_flags);
4217 }
4218
4219 if (error)
4220 {
4221 bfd_set_error (bfd_error_bad_value);
4222 return FALSE;
4223 }
4224 }
4225
4226 return TRUE;
4227 }
4228 \f
4229 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4230 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4231 int
4232 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4233 struct bfd_link_info *info,
4234 enum ppc_elf_plt_type plt_style,
4235 int emit_stub_syms)
4236 {
4237 struct ppc_elf_link_hash_table *htab;
4238 flagword flags;
4239
4240 htab = ppc_elf_hash_table (info);
4241
4242 htab->emit_stub_syms = emit_stub_syms;
4243
4244 if (htab->plt_type == PLT_UNSET)
4245 {
4246 if (plt_style == PLT_OLD)
4247 htab->plt_type = PLT_OLD;
4248 else
4249 {
4250 bfd *ibfd;
4251 enum ppc_elf_plt_type plt_type = plt_style;
4252
4253 /* Look through the reloc flags left by ppc_elf_check_relocs.
4254 Use the old style bss plt if a file makes plt calls
4255 without using the new relocs, and if ld isn't given
4256 --secure-plt and we never see REL16 relocs. */
4257 if (plt_type == PLT_UNSET)
4258 plt_type = PLT_OLD;
4259 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4260 if (is_ppc_elf (ibfd))
4261 {
4262 if (ppc_elf_tdata (ibfd)->has_rel16)
4263 plt_type = PLT_NEW;
4264 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4265 {
4266 plt_type = PLT_OLD;
4267 htab->old_bfd = ibfd;
4268 break;
4269 }
4270 }
4271 htab->plt_type = plt_type;
4272 }
4273 }
4274 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4275 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4276
4277 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4278
4279 if (htab->plt_type == PLT_NEW)
4280 {
4281 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4282 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4283
4284 /* The new PLT is a loaded section. */
4285 if (htab->plt != NULL
4286 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4287 return -1;
4288
4289 /* The new GOT is not executable. */
4290 if (htab->got != NULL
4291 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4292 return -1;
4293 }
4294 else
4295 {
4296 /* Stop an unused .glink section from affecting .text alignment. */
4297 if (htab->glink != NULL
4298 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4299 return -1;
4300 }
4301 return htab->plt_type == PLT_NEW;
4302 }
4303 \f
4304 /* Return the section that should be marked against GC for a given
4305 relocation. */
4306
4307 static asection *
4308 ppc_elf_gc_mark_hook (asection *sec,
4309 struct bfd_link_info *info,
4310 Elf_Internal_Rela *rel,
4311 struct elf_link_hash_entry *h,
4312 Elf_Internal_Sym *sym)
4313 {
4314 if (h != NULL)
4315 switch (ELF32_R_TYPE (rel->r_info))
4316 {
4317 case R_PPC_GNU_VTINHERIT:
4318 case R_PPC_GNU_VTENTRY:
4319 return NULL;
4320 }
4321
4322 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4323 }
4324
4325 /* Update the got, plt and dynamic reloc reference counts for the
4326 section being removed. */
4327
4328 static bfd_boolean
4329 ppc_elf_gc_sweep_hook (bfd *abfd,
4330 struct bfd_link_info *info,
4331 asection *sec,
4332 const Elf_Internal_Rela *relocs)
4333 {
4334 struct ppc_elf_link_hash_table *htab;
4335 Elf_Internal_Shdr *symtab_hdr;
4336 struct elf_link_hash_entry **sym_hashes;
4337 bfd_signed_vma *local_got_refcounts;
4338 const Elf_Internal_Rela *rel, *relend;
4339 asection *got2;
4340
4341 if (info->relocatable)
4342 return TRUE;
4343
4344 if ((sec->flags & SEC_ALLOC) == 0)
4345 return TRUE;
4346
4347 elf_section_data (sec)->local_dynrel = NULL;
4348
4349 htab = ppc_elf_hash_table (info);
4350 symtab_hdr = &elf_symtab_hdr (abfd);
4351 sym_hashes = elf_sym_hashes (abfd);
4352 local_got_refcounts = elf_local_got_refcounts (abfd);
4353 got2 = bfd_get_section_by_name (abfd, ".got2");
4354
4355 relend = relocs + sec->reloc_count;
4356 for (rel = relocs; rel < relend; rel++)
4357 {
4358 unsigned long r_symndx;
4359 enum elf_ppc_reloc_type r_type;
4360 struct elf_link_hash_entry *h = NULL;
4361
4362 r_symndx = ELF32_R_SYM (rel->r_info);
4363 if (r_symndx >= symtab_hdr->sh_info)
4364 {
4365 struct elf_dyn_relocs **pp, *p;
4366 struct ppc_elf_link_hash_entry *eh;
4367
4368 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4369 while (h->root.type == bfd_link_hash_indirect
4370 || h->root.type == bfd_link_hash_warning)
4371 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4372 eh = (struct ppc_elf_link_hash_entry *) h;
4373
4374 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4375 if (p->sec == sec)
4376 {
4377 /* Everything must go for SEC. */
4378 *pp = p->next;
4379 break;
4380 }
4381 }
4382
4383 r_type = ELF32_R_TYPE (rel->r_info);
4384 if (!htab->is_vxworks
4385 && h == NULL
4386 && local_got_refcounts != NULL
4387 && (!info->shared
4388 || is_branch_reloc (r_type)))
4389 {
4390 struct plt_entry **local_plt = (struct plt_entry **)
4391 (local_got_refcounts + symtab_hdr->sh_info);
4392 char *local_got_tls_masks = (char *)
4393 (local_plt + symtab_hdr->sh_info);
4394 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4395 {
4396 struct plt_entry **ifunc = local_plt + r_symndx;
4397 bfd_vma addend = 0;
4398 struct plt_entry *ent;
4399
4400 if (r_type == R_PPC_PLTREL24 && info->shared)
4401 addend = rel->r_addend;
4402 ent = find_plt_ent (ifunc, got2, addend);
4403 if (ent->plt.refcount > 0)
4404 ent->plt.refcount -= 1;
4405 continue;
4406 }
4407 }
4408
4409 switch (r_type)
4410 {
4411 case R_PPC_GOT_TLSLD16:
4412 case R_PPC_GOT_TLSLD16_LO:
4413 case R_PPC_GOT_TLSLD16_HI:
4414 case R_PPC_GOT_TLSLD16_HA:
4415 case R_PPC_GOT_TLSGD16:
4416 case R_PPC_GOT_TLSGD16_LO:
4417 case R_PPC_GOT_TLSGD16_HI:
4418 case R_PPC_GOT_TLSGD16_HA:
4419 case R_PPC_GOT_TPREL16:
4420 case R_PPC_GOT_TPREL16_LO:
4421 case R_PPC_GOT_TPREL16_HI:
4422 case R_PPC_GOT_TPREL16_HA:
4423 case R_PPC_GOT_DTPREL16:
4424 case R_PPC_GOT_DTPREL16_LO:
4425 case R_PPC_GOT_DTPREL16_HI:
4426 case R_PPC_GOT_DTPREL16_HA:
4427 case R_PPC_GOT16:
4428 case R_PPC_GOT16_LO:
4429 case R_PPC_GOT16_HI:
4430 case R_PPC_GOT16_HA:
4431 if (h != NULL)
4432 {
4433 if (h->got.refcount > 0)
4434 h->got.refcount--;
4435 if (!info->shared)
4436 {
4437 struct plt_entry *ent;
4438
4439 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4440 if (ent != NULL && ent->plt.refcount > 0)
4441 ent->plt.refcount -= 1;
4442 }
4443 }
4444 else if (local_got_refcounts != NULL)
4445 {
4446 if (local_got_refcounts[r_symndx] > 0)
4447 local_got_refcounts[r_symndx]--;
4448 }
4449 break;
4450
4451 case R_PPC_REL24:
4452 case R_PPC_REL14:
4453 case R_PPC_REL14_BRTAKEN:
4454 case R_PPC_REL14_BRNTAKEN:
4455 case R_PPC_REL32:
4456 if (h == NULL || h == htab->elf.hgot)
4457 break;
4458 /* Fall thru */
4459
4460 case R_PPC_ADDR32:
4461 case R_PPC_ADDR24:
4462 case R_PPC_ADDR16:
4463 case R_PPC_ADDR16_LO:
4464 case R_PPC_ADDR16_HI:
4465 case R_PPC_ADDR16_HA:
4466 case R_PPC_ADDR14:
4467 case R_PPC_ADDR14_BRTAKEN:
4468 case R_PPC_ADDR14_BRNTAKEN:
4469 case R_PPC_UADDR32:
4470 case R_PPC_UADDR16:
4471 if (info->shared)
4472 break;
4473
4474 case R_PPC_PLT32:
4475 case R_PPC_PLTREL24:
4476 case R_PPC_PLTREL32:
4477 case R_PPC_PLT16_LO:
4478 case R_PPC_PLT16_HI:
4479 case R_PPC_PLT16_HA:
4480 if (h != NULL)
4481 {
4482 bfd_vma addend = 0;
4483 struct plt_entry *ent;
4484
4485 if (r_type == R_PPC_PLTREL24 && info->shared)
4486 addend = rel->r_addend;
4487 ent = find_plt_ent (&h->plt.plist, got2, addend);
4488 if (ent != NULL && ent->plt.refcount > 0)
4489 ent->plt.refcount -= 1;
4490 }
4491 break;
4492
4493 default:
4494 break;
4495 }
4496 }
4497 return TRUE;
4498 }
4499 \f
4500 /* Set plt output section type, htab->tls_get_addr, and call the
4501 generic ELF tls_setup function. */
4502
4503 asection *
4504 ppc_elf_tls_setup (bfd *obfd,
4505 struct bfd_link_info *info,
4506 int no_tls_get_addr_opt)
4507 {
4508 struct ppc_elf_link_hash_table *htab;
4509
4510 htab = ppc_elf_hash_table (info);
4511 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4512 FALSE, FALSE, TRUE);
4513 if (!no_tls_get_addr_opt)
4514 {
4515 struct elf_link_hash_entry *opt, *tga;
4516 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4517 FALSE, FALSE, TRUE);
4518 if (opt != NULL
4519 && (opt->root.type == bfd_link_hash_defined
4520 || opt->root.type == bfd_link_hash_defweak))
4521 {
4522 /* If glibc supports an optimized __tls_get_addr call stub,
4523 signalled by the presence of __tls_get_addr_opt, and we'll
4524 be calling __tls_get_addr via a plt call stub, then
4525 make __tls_get_addr point to __tls_get_addr_opt. */
4526 tga = htab->tls_get_addr;
4527 if (htab->elf.dynamic_sections_created
4528 && tga != NULL
4529 && (tga->type == STT_FUNC
4530 || tga->needs_plt)
4531 && !(SYMBOL_CALLS_LOCAL (info, tga)
4532 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
4533 && tga->root.type == bfd_link_hash_undefweak)))
4534 {
4535 struct plt_entry *ent;
4536 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
4537 if (ent->plt.refcount > 0)
4538 break;
4539 if (ent != NULL)
4540 {
4541 tga->root.type = bfd_link_hash_indirect;
4542 tga->root.u.i.link = &opt->root;
4543 ppc_elf_copy_indirect_symbol (info, opt, tga);
4544 if (opt->dynindx != -1)
4545 {
4546 /* Use __tls_get_addr_opt in dynamic relocations. */
4547 opt->dynindx = -1;
4548 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4549 opt->dynstr_index);
4550 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
4551 return FALSE;
4552 }
4553 htab->tls_get_addr = opt;
4554 }
4555 }
4556 }
4557 else
4558 no_tls_get_addr_opt = TRUE;
4559 }
4560 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
4561 if (htab->plt_type == PLT_NEW
4562 && htab->plt != NULL
4563 && htab->plt->output_section != NULL)
4564 {
4565 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4566 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4567 }
4568
4569 return _bfd_elf_tls_setup (obfd, info);
4570 }
4571
4572 /* Return TRUE iff REL is a branch reloc with a global symbol matching
4573 HASH. */
4574
4575 static bfd_boolean
4576 branch_reloc_hash_match (const bfd *ibfd,
4577 const Elf_Internal_Rela *rel,
4578 const struct elf_link_hash_entry *hash)
4579 {
4580 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4581 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
4582 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
4583
4584 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
4585 {
4586 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
4587 struct elf_link_hash_entry *h;
4588
4589 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4590 while (h->root.type == bfd_link_hash_indirect
4591 || h->root.type == bfd_link_hash_warning)
4592 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4593 if (h == hash)
4594 return TRUE;
4595 }
4596 return FALSE;
4597 }
4598
4599 /* Run through all the TLS relocs looking for optimization
4600 opportunities. */
4601
4602 bfd_boolean
4603 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4604 struct bfd_link_info *info)
4605 {
4606 bfd *ibfd;
4607 asection *sec;
4608 struct ppc_elf_link_hash_table *htab;
4609 int pass;
4610
4611 if (info->relocatable || !info->executable)
4612 return TRUE;
4613
4614 htab = ppc_elf_hash_table (info);
4615 if (htab == NULL)
4616 return FALSE;
4617
4618 /* Make two passes through the relocs. First time check that tls
4619 relocs involved in setting up a tls_get_addr call are indeed
4620 followed by such a call. If they are not, don't do any tls
4621 optimization. On the second pass twiddle tls_mask flags to
4622 notify relocate_section that optimization can be done, and
4623 adjust got and plt refcounts. */
4624 for (pass = 0; pass < 2; ++pass)
4625 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4626 {
4627 Elf_Internal_Sym *locsyms = NULL;
4628 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4629 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
4630
4631 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4632 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4633 {
4634 Elf_Internal_Rela *relstart, *rel, *relend;
4635 int expecting_tls_get_addr = 0;
4636
4637 /* Read the relocations. */
4638 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4639 info->keep_memory);
4640 if (relstart == NULL)
4641 return FALSE;
4642
4643 relend = relstart + sec->reloc_count;
4644 for (rel = relstart; rel < relend; rel++)
4645 {
4646 enum elf_ppc_reloc_type r_type;
4647 unsigned long r_symndx;
4648 struct elf_link_hash_entry *h = NULL;
4649 char *tls_mask;
4650 char tls_set, tls_clear;
4651 bfd_boolean is_local;
4652 bfd_signed_vma *got_count;
4653
4654 r_symndx = ELF32_R_SYM (rel->r_info);
4655 if (r_symndx >= symtab_hdr->sh_info)
4656 {
4657 struct elf_link_hash_entry **sym_hashes;
4658
4659 sym_hashes = elf_sym_hashes (ibfd);
4660 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4661 while (h->root.type == bfd_link_hash_indirect
4662 || h->root.type == bfd_link_hash_warning)
4663 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4664 }
4665
4666 is_local = FALSE;
4667 if (h == NULL
4668 || !h->def_dynamic)
4669 is_local = TRUE;
4670
4671 r_type = ELF32_R_TYPE (rel->r_info);
4672 /* If this section has old-style __tls_get_addr calls
4673 without marker relocs, then check that each
4674 __tls_get_addr call reloc is preceded by a reloc
4675 that conceivably belongs to the __tls_get_addr arg
4676 setup insn. If we don't find matching arg setup
4677 relocs, don't do any tls optimization. */
4678 if (pass == 0
4679 && sec->has_tls_get_addr_call
4680 && h != NULL
4681 && h == htab->tls_get_addr
4682 && !expecting_tls_get_addr
4683 && is_branch_reloc (r_type))
4684 {
4685 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
4686 "TLS optimization disabled\n",
4687 ibfd, sec, rel->r_offset);
4688 if (elf_section_data (sec)->relocs != relstart)
4689 free (relstart);
4690 return TRUE;
4691 }
4692
4693 expecting_tls_get_addr = 0;
4694 switch (r_type)
4695 {
4696 case R_PPC_GOT_TLSLD16:
4697 case R_PPC_GOT_TLSLD16_LO:
4698 expecting_tls_get_addr = 1;
4699 /* Fall thru */
4700
4701 case R_PPC_GOT_TLSLD16_HI:
4702 case R_PPC_GOT_TLSLD16_HA:
4703 /* These relocs should never be against a symbol
4704 defined in a shared lib. Leave them alone if
4705 that turns out to be the case. */
4706 if (!is_local)
4707 continue;
4708
4709 /* LD -> LE */
4710 tls_set = 0;
4711 tls_clear = TLS_LD;
4712 break;
4713
4714 case R_PPC_GOT_TLSGD16:
4715 case R_PPC_GOT_TLSGD16_LO:
4716 expecting_tls_get_addr = 1;
4717 /* Fall thru */
4718
4719 case R_PPC_GOT_TLSGD16_HI:
4720 case R_PPC_GOT_TLSGD16_HA:
4721 if (is_local)
4722 /* GD -> LE */
4723 tls_set = 0;
4724 else
4725 /* GD -> IE */
4726 tls_set = TLS_TLS | TLS_TPRELGD;
4727 tls_clear = TLS_GD;
4728 break;
4729
4730 case R_PPC_GOT_TPREL16:
4731 case R_PPC_GOT_TPREL16_LO:
4732 case R_PPC_GOT_TPREL16_HI:
4733 case R_PPC_GOT_TPREL16_HA:
4734 if (is_local)
4735 {
4736 /* IE -> LE */
4737 tls_set = 0;
4738 tls_clear = TLS_TPREL;
4739 break;
4740 }
4741 else
4742 continue;
4743
4744 case R_PPC_TLSGD:
4745 case R_PPC_TLSLD:
4746 expecting_tls_get_addr = 2;
4747 tls_set = 0;
4748 tls_clear = 0;
4749 break;
4750
4751 default:
4752 continue;
4753 }
4754
4755 if (pass == 0)
4756 {
4757 if (!expecting_tls_get_addr
4758 || (expecting_tls_get_addr == 1
4759 && !sec->has_tls_get_addr_call))
4760 continue;
4761
4762 if (rel + 1 < relend
4763 && branch_reloc_hash_match (ibfd, rel + 1,
4764 htab->tls_get_addr))
4765 continue;
4766
4767 /* Uh oh, we didn't find the expected call. We
4768 could just mark this symbol to exclude it
4769 from tls optimization but it's safer to skip
4770 the entire optimization. */
4771 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
4772 "TLS optimization disabled\n"),
4773 ibfd, sec, rel->r_offset);
4774 if (elf_section_data (sec)->relocs != relstart)
4775 free (relstart);
4776 return TRUE;
4777 }
4778
4779 if (expecting_tls_get_addr)
4780 {
4781 struct plt_entry *ent;
4782 bfd_vma addend = 0;
4783
4784 if (info->shared
4785 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
4786 addend = rel[1].r_addend;
4787 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
4788 got2, addend);
4789 if (ent != NULL && ent->plt.refcount > 0)
4790 ent->plt.refcount -= 1;
4791
4792 if (expecting_tls_get_addr == 2)
4793 continue;
4794 }
4795
4796 if (h != NULL)
4797 {
4798 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4799 got_count = &h->got.refcount;
4800 }
4801 else
4802 {
4803 bfd_signed_vma *lgot_refs;
4804 struct plt_entry **local_plt;
4805 char *lgot_masks;
4806
4807 if (locsyms == NULL)
4808 {
4809 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4810 if (locsyms == NULL)
4811 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4812 symtab_hdr->sh_info,
4813 0, NULL, NULL, NULL);
4814 if (locsyms == NULL)
4815 {
4816 if (elf_section_data (sec)->relocs != relstart)
4817 free (relstart);
4818 return FALSE;
4819 }
4820 }
4821 lgot_refs = elf_local_got_refcounts (ibfd);
4822 if (lgot_refs == NULL)
4823 abort ();
4824 local_plt = (struct plt_entry **)
4825 (lgot_refs + symtab_hdr->sh_info);
4826 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
4827 tls_mask = &lgot_masks[r_symndx];
4828 got_count = &lgot_refs[r_symndx];
4829 }
4830
4831 if (tls_set == 0)
4832 {
4833 /* We managed to get rid of a got entry. */
4834 if (*got_count > 0)
4835 *got_count -= 1;
4836 }
4837
4838 *tls_mask |= tls_set;
4839 *tls_mask &= ~tls_clear;
4840 }
4841
4842 if (elf_section_data (sec)->relocs != relstart)
4843 free (relstart);
4844 }
4845
4846 if (locsyms != NULL
4847 && (symtab_hdr->contents != (unsigned char *) locsyms))
4848 {
4849 if (!info->keep_memory)
4850 free (locsyms);
4851 else
4852 symtab_hdr->contents = (unsigned char *) locsyms;
4853 }
4854 }
4855 return TRUE;
4856 }
4857 \f
4858 /* Return true if we have dynamic relocs that apply to read-only sections. */
4859
4860 static bfd_boolean
4861 readonly_dynrelocs (struct elf_link_hash_entry *h)
4862 {
4863 struct elf_dyn_relocs *p;
4864
4865 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4866 {
4867 asection *s = p->sec->output_section;
4868
4869 if (s != NULL
4870 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4871 == (SEC_READONLY | SEC_ALLOC)))
4872 return TRUE;
4873 }
4874 return FALSE;
4875 }
4876
4877 /* Adjust a symbol defined by a dynamic object and referenced by a
4878 regular object. The current definition is in some section of the
4879 dynamic object, but we're not including those sections. We have to
4880 change the definition to something the rest of the link can
4881 understand. */
4882
4883 static bfd_boolean
4884 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4885 struct elf_link_hash_entry *h)
4886 {
4887 struct ppc_elf_link_hash_table *htab;
4888 asection *s;
4889
4890 #ifdef DEBUG
4891 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4892 h->root.root.string);
4893 #endif
4894
4895 /* Make sure we know what is going on here. */
4896 htab = ppc_elf_hash_table (info);
4897 BFD_ASSERT (htab->elf.dynobj != NULL
4898 && (h->needs_plt
4899 || h->type == STT_GNU_IFUNC
4900 || h->u.weakdef != NULL
4901 || (h->def_dynamic
4902 && h->ref_regular
4903 && !h->def_regular)));
4904
4905 /* Deal with function syms. */
4906 if (h->type == STT_FUNC
4907 || h->type == STT_GNU_IFUNC
4908 || h->needs_plt)
4909 {
4910 /* Clear procedure linkage table information for any symbol that
4911 won't need a .plt entry. */
4912 struct plt_entry *ent;
4913 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4914 if (ent->plt.refcount > 0)
4915 break;
4916 if (ent == NULL
4917 || (h->type != STT_GNU_IFUNC
4918 && (SYMBOL_CALLS_LOCAL (info, h)
4919 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4920 && h->root.type == bfd_link_hash_undefweak))))
4921 {
4922 /* A PLT entry is not required/allowed when:
4923
4924 1. We are not using ld.so; because then the PLT entry
4925 can't be set up, so we can't use one. In this case,
4926 ppc_elf_adjust_dynamic_symbol won't even be called.
4927
4928 2. GC has rendered the entry unused.
4929
4930 3. We know for certain that a call to this symbol
4931 will go to this object, or will remain undefined. */
4932 h->plt.plist = NULL;
4933 h->needs_plt = 0;
4934 }
4935 else
4936 {
4937 /* After adjust_dynamic_symbol, non_got_ref set in the
4938 non-shared case means that we have allocated space in
4939 .dynbss for the symbol and thus dyn_relocs for this
4940 symbol should be discarded.
4941 If we get here we know we are making a PLT entry for this
4942 symbol, and in an executable we'd normally resolve
4943 relocations against this symbol to the PLT entry. Allow
4944 dynamic relocs if the reference is weak, and the dynamic
4945 relocs will not cause text relocation. */
4946 if (!h->ref_regular_nonweak
4947 && h->non_got_ref
4948 && h->type != STT_GNU_IFUNC
4949 && !htab->is_vxworks
4950 && !ppc_elf_hash_entry (h)->has_sda_refs
4951 && !readonly_dynrelocs (h))
4952 h->non_got_ref = 0;
4953 }
4954 return TRUE;
4955 }
4956 else
4957 h->plt.plist = NULL;
4958
4959 /* If this is a weak symbol, and there is a real definition, the
4960 processor independent code will have arranged for us to see the
4961 real definition first, and we can just use the same value. */
4962 if (h->u.weakdef != NULL)
4963 {
4964 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4965 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4966 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4967 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4968 if (ELIMINATE_COPY_RELOCS)
4969 h->non_got_ref = h->u.weakdef->non_got_ref;
4970 return TRUE;
4971 }
4972
4973 /* This is a reference to a symbol defined by a dynamic object which
4974 is not a function. */
4975
4976 /* If we are creating a shared library, we must presume that the
4977 only references to the symbol are via the global offset table.
4978 For such cases we need not do anything here; the relocations will
4979 be handled correctly by relocate_section. */
4980 if (info->shared)
4981 return TRUE;
4982
4983 /* If there are no references to this symbol that do not use the
4984 GOT, we don't need to generate a copy reloc. */
4985 if (!h->non_got_ref)
4986 return TRUE;
4987
4988 /* If we didn't find any dynamic relocs in read-only sections, then
4989 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4990 We can't do this if there are any small data relocations. This
4991 doesn't work on VxWorks, where we can not have dynamic
4992 relocations (other than copy and jump slot relocations) in an
4993 executable. */
4994 if (ELIMINATE_COPY_RELOCS
4995 && !ppc_elf_hash_entry (h)->has_sda_refs
4996 && !htab->is_vxworks
4997 && !h->def_regular
4998 && !readonly_dynrelocs (h))
4999 {
5000 h->non_got_ref = 0;
5001 return TRUE;
5002 }
5003
5004 if (h->size == 0)
5005 {
5006 info->callbacks->einfo (_("dynamic variable `%s' is zero size\n"),
5007 h->root.root.string);
5008 return TRUE;
5009 }
5010
5011 /* We must allocate the symbol in our .dynbss section, which will
5012 become part of the .bss section of the executable. There will be
5013 an entry for this symbol in the .dynsym section. The dynamic
5014 object will contain position independent code, so all references
5015 from the dynamic object to this symbol will go through the global
5016 offset table. The dynamic linker will use the .dynsym entry to
5017 determine the address it must put in the global offset table, so
5018 both the dynamic object and the regular object will refer to the
5019 same memory location for the variable.
5020
5021 Of course, if the symbol is referenced using SDAREL relocs, we
5022 must instead allocate it in .sbss. */
5023
5024 if (ppc_elf_hash_entry (h)->has_sda_refs)
5025 s = htab->dynsbss;
5026 else
5027 s = htab->dynbss;
5028 BFD_ASSERT (s != NULL);
5029
5030 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5031 copy the initial value out of the dynamic object and into the
5032 runtime process image. We need to remember the offset into the
5033 .rela.bss section we are going to use. */
5034 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5035 {
5036 asection *srel;
5037
5038 if (ppc_elf_hash_entry (h)->has_sda_refs)
5039 srel = htab->relsbss;
5040 else
5041 srel = htab->relbss;
5042 BFD_ASSERT (srel != NULL);
5043 srel->size += sizeof (Elf32_External_Rela);
5044 h->needs_copy = 1;
5045 }
5046
5047 return _bfd_elf_adjust_dynamic_copy (h, s);
5048 }
5049 \f
5050 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5051 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5052 specifying the addend on the plt relocation. For -fpic code, the sym
5053 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5054 xxxxxxxx.got2.plt_pic32.<callee>. */
5055
5056 static bfd_boolean
5057 add_stub_sym (struct plt_entry *ent,
5058 struct elf_link_hash_entry *h,
5059 struct bfd_link_info *info)
5060 {
5061 struct elf_link_hash_entry *sh;
5062 size_t len1, len2, len3;
5063 char *name;
5064 const char *stub;
5065 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5066
5067 if (info->shared)
5068 stub = ".plt_pic32.";
5069 else
5070 stub = ".plt_call32.";
5071
5072 len1 = strlen (h->root.root.string);
5073 len2 = strlen (stub);
5074 len3 = 0;
5075 if (ent->sec)
5076 len3 = strlen (ent->sec->name);
5077 name = bfd_malloc (len1 + len2 + len3 + 9);
5078 if (name == NULL)
5079 return FALSE;
5080 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5081 if (ent->sec)
5082 memcpy (name + 8, ent->sec->name, len3);
5083 memcpy (name + 8 + len3, stub, len2);
5084 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5085 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5086 if (sh == NULL)
5087 return FALSE;
5088 if (sh->root.type == bfd_link_hash_new)
5089 {
5090 sh->root.type = bfd_link_hash_defined;
5091 sh->root.u.def.section = htab->glink;
5092 sh->root.u.def.value = ent->glink_offset;
5093 sh->ref_regular = 1;
5094 sh->def_regular = 1;
5095 sh->ref_regular_nonweak = 1;
5096 sh->forced_local = 1;
5097 sh->non_elf = 0;
5098 }
5099 return TRUE;
5100 }
5101
5102 /* Allocate NEED contiguous space in .got, and return the offset.
5103 Handles allocation of the got header when crossing 32k. */
5104
5105 static bfd_vma
5106 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5107 {
5108 bfd_vma where;
5109 unsigned int max_before_header;
5110
5111 if (htab->plt_type == PLT_VXWORKS)
5112 {
5113 where = htab->got->size;
5114 htab->got->size += need;
5115 }
5116 else
5117 {
5118 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5119 if (need <= htab->got_gap)
5120 {
5121 where = max_before_header - htab->got_gap;
5122 htab->got_gap -= need;
5123 }
5124 else
5125 {
5126 if (htab->got->size + need > max_before_header
5127 && htab->got->size <= max_before_header)
5128 {
5129 htab->got_gap = max_before_header - htab->got->size;
5130 htab->got->size = max_before_header + htab->got_header_size;
5131 }
5132 where = htab->got->size;
5133 htab->got->size += need;
5134 }
5135 }
5136 return where;
5137 }
5138
5139 /* Allocate space in associated reloc sections for dynamic relocs. */
5140
5141 static bfd_boolean
5142 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5143 {
5144 struct bfd_link_info *info = inf;
5145 struct ppc_elf_link_hash_entry *eh;
5146 struct ppc_elf_link_hash_table *htab;
5147 struct elf_dyn_relocs *p;
5148
5149 if (h->root.type == bfd_link_hash_indirect)
5150 return TRUE;
5151
5152 if (h->root.type == bfd_link_hash_warning)
5153 /* When warning symbols are created, they **replace** the "real"
5154 entry in the hash table, thus we never get to see the real
5155 symbol in a hash traversal. So look at it now. */
5156 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5157
5158 htab = ppc_elf_hash_table (info);
5159 if (htab->elf.dynamic_sections_created
5160 || h->type == STT_GNU_IFUNC)
5161 {
5162 struct plt_entry *ent;
5163 bfd_boolean doneone = FALSE;
5164 bfd_vma plt_offset = 0, glink_offset = 0;
5165 bfd_boolean dyn;
5166
5167 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5168 if (ent->plt.refcount > 0)
5169 {
5170 /* Make sure this symbol is output as a dynamic symbol. */
5171 if (h->dynindx == -1
5172 && !h->forced_local
5173 && !h->def_regular
5174 && htab->elf.dynamic_sections_created)
5175 {
5176 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5177 return FALSE;
5178 }
5179
5180 dyn = htab->elf.dynamic_sections_created;
5181 if (info->shared
5182 || h->type == STT_GNU_IFUNC
5183 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5184 {
5185 asection *s = htab->plt;
5186 if (!dyn || h->dynindx == -1)
5187 s = htab->iplt;
5188
5189 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5190 {
5191 if (!doneone)
5192 {
5193 plt_offset = s->size;
5194 s->size += 4;
5195 }
5196 ent->plt.offset = plt_offset;
5197
5198 s = htab->glink;
5199 if (!doneone || info->shared)
5200 {
5201 glink_offset = s->size;
5202 s->size += GLINK_ENTRY_SIZE;
5203 if (h == htab->tls_get_addr
5204 && !htab->no_tls_get_addr_opt)
5205 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5206 }
5207 if (!doneone
5208 && !info->shared
5209 && h->def_dynamic
5210 && !h->def_regular)
5211 {
5212 h->root.u.def.section = s;
5213 h->root.u.def.value = glink_offset;
5214 }
5215 ent->glink_offset = glink_offset;
5216
5217 if (htab->emit_stub_syms
5218 && !add_stub_sym (ent, h, info))
5219 return FALSE;
5220 }
5221 else
5222 {
5223 if (!doneone)
5224 {
5225 /* If this is the first .plt entry, make room
5226 for the special first entry. */
5227 if (s->size == 0)
5228 s->size += htab->plt_initial_entry_size;
5229
5230 /* The PowerPC PLT is actually composed of two
5231 parts, the first part is 2 words (for a load
5232 and a jump), and then there is a remaining
5233 word available at the end. */
5234 plt_offset = (htab->plt_initial_entry_size
5235 + (htab->plt_slot_size
5236 * ((s->size
5237 - htab->plt_initial_entry_size)
5238 / htab->plt_entry_size)));
5239
5240 /* If this symbol is not defined in a regular
5241 file, and we are not generating a shared
5242 library, then set the symbol to this location
5243 in the .plt. This is to avoid text
5244 relocations, and is required to make
5245 function pointers compare as equal between
5246 the normal executable and the shared library. */
5247 if (! info->shared
5248 && h->def_dynamic
5249 && !h->def_regular)
5250 {
5251 h->root.u.def.section = s;
5252 h->root.u.def.value = plt_offset;
5253 }
5254
5255 /* Make room for this entry. */
5256 s->size += htab->plt_entry_size;
5257 /* After the 8192nd entry, room for two entries
5258 is allocated. */
5259 if (htab->plt_type == PLT_OLD
5260 && (s->size - htab->plt_initial_entry_size)
5261 / htab->plt_entry_size
5262 > PLT_NUM_SINGLE_ENTRIES)
5263 s->size += htab->plt_entry_size;
5264 }
5265 ent->plt.offset = plt_offset;
5266 }
5267
5268 /* We also need to make an entry in the .rela.plt section. */
5269 if (!doneone)
5270 {
5271 if (!htab->elf.dynamic_sections_created
5272 || h->dynindx == -1)
5273 htab->reliplt->size += sizeof (Elf32_External_Rela);
5274 else
5275 {
5276 htab->relplt->size += sizeof (Elf32_External_Rela);
5277
5278 if (htab->plt_type == PLT_VXWORKS)
5279 {
5280 /* Allocate space for the unloaded relocations. */
5281 if (!info->shared
5282 && htab->elf.dynamic_sections_created)
5283 {
5284 if (ent->plt.offset
5285 == (bfd_vma) htab->plt_initial_entry_size)
5286 {
5287 htab->srelplt2->size
5288 += (sizeof (Elf32_External_Rela)
5289 * VXWORKS_PLTRESOLVE_RELOCS);
5290 }
5291
5292 htab->srelplt2->size
5293 += (sizeof (Elf32_External_Rela)
5294 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5295 }
5296
5297 /* Every PLT entry has an associated GOT entry in
5298 .got.plt. */
5299 htab->sgotplt->size += 4;
5300 }
5301 }
5302 doneone = TRUE;
5303 }
5304 }
5305 else
5306 ent->plt.offset = (bfd_vma) -1;
5307 }
5308 else
5309 ent->plt.offset = (bfd_vma) -1;
5310
5311 if (!doneone)
5312 {
5313 h->plt.plist = NULL;
5314 h->needs_plt = 0;
5315 }
5316 }
5317 else
5318 {
5319 h->plt.plist = NULL;
5320 h->needs_plt = 0;
5321 }
5322
5323 eh = (struct ppc_elf_link_hash_entry *) h;
5324 if (eh->elf.got.refcount > 0)
5325 {
5326 bfd_boolean dyn;
5327 unsigned int need;
5328
5329 /* Make sure this symbol is output as a dynamic symbol. */
5330 if (eh->elf.dynindx == -1
5331 && !eh->elf.forced_local
5332 && eh->elf.type != STT_GNU_IFUNC
5333 && htab->elf.dynamic_sections_created)
5334 {
5335 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5336 return FALSE;
5337 }
5338
5339 need = 0;
5340 if ((eh->tls_mask & TLS_TLS) != 0)
5341 {
5342 if ((eh->tls_mask & TLS_LD) != 0)
5343 {
5344 if (!eh->elf.def_dynamic)
5345 /* We'll just use htab->tlsld_got.offset. This should
5346 always be the case. It's a little odd if we have
5347 a local dynamic reloc against a non-local symbol. */
5348 htab->tlsld_got.refcount += 1;
5349 else
5350 need += 8;
5351 }
5352 if ((eh->tls_mask & TLS_GD) != 0)
5353 need += 8;
5354 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5355 need += 4;
5356 if ((eh->tls_mask & TLS_DTPREL) != 0)
5357 need += 4;
5358 }
5359 else
5360 need += 4;
5361 if (need == 0)
5362 eh->elf.got.offset = (bfd_vma) -1;
5363 else
5364 {
5365 eh->elf.got.offset = allocate_got (htab, need);
5366 dyn = htab->elf.dynamic_sections_created;
5367 if ((info->shared
5368 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5369 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5370 || eh->elf.root.type != bfd_link_hash_undefweak))
5371 {
5372 asection *rsec = htab->relgot;
5373 /* All the entries we allocated need relocs.
5374 Except LD only needs one. */
5375 if ((eh->tls_mask & TLS_LD) != 0
5376 && eh->elf.def_dynamic)
5377 need -= 4;
5378 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5379 }
5380 }
5381 }
5382 else
5383 eh->elf.got.offset = (bfd_vma) -1;
5384
5385 if (eh->dyn_relocs == NULL
5386 || !htab->elf.dynamic_sections_created)
5387 return TRUE;
5388
5389 /* In the shared -Bsymbolic case, discard space allocated for
5390 dynamic pc-relative relocs against symbols which turn out to be
5391 defined in regular objects. For the normal shared case, discard
5392 space for relocs that have become local due to symbol visibility
5393 changes. */
5394
5395 if (info->shared)
5396 {
5397 /* Relocs that use pc_count are those that appear on a call insn,
5398 or certain REL relocs (see must_be_dyn_reloc) that can be
5399 generated via assembly. We want calls to protected symbols to
5400 resolve directly to the function rather than going via the plt.
5401 If people want function pointer comparisons to work as expected
5402 then they should avoid writing weird assembly. */
5403 if (SYMBOL_CALLS_LOCAL (info, h))
5404 {
5405 struct elf_dyn_relocs **pp;
5406
5407 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5408 {
5409 p->count -= p->pc_count;
5410 p->pc_count = 0;
5411 if (p->count == 0)
5412 *pp = p->next;
5413 else
5414 pp = &p->next;
5415 }
5416 }
5417
5418 if (htab->is_vxworks)
5419 {
5420 struct elf_dyn_relocs **pp;
5421
5422 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5423 {
5424 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5425 *pp = p->next;
5426 else
5427 pp = &p->next;
5428 }
5429 }
5430
5431 /* Discard relocs on undefined symbols that must be local. */
5432 if (eh->dyn_relocs != NULL
5433 && h->root.type == bfd_link_hash_undefined
5434 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5435 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5436 eh->dyn_relocs = NULL;
5437
5438 /* Also discard relocs on undefined weak syms with non-default
5439 visibility. */
5440 if (eh->dyn_relocs != NULL
5441 && h->root.type == bfd_link_hash_undefweak)
5442 {
5443 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5444 eh->dyn_relocs = NULL;
5445
5446 /* Make sure undefined weak symbols are output as a dynamic
5447 symbol in PIEs. */
5448 else if (h->dynindx == -1
5449 && !h->forced_local
5450 && !h->def_regular)
5451 {
5452 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5453 return FALSE;
5454 }
5455 }
5456 }
5457 else if (ELIMINATE_COPY_RELOCS)
5458 {
5459 /* For the non-shared case, discard space for relocs against
5460 symbols which turn out to need copy relocs or are not
5461 dynamic. */
5462
5463 if (!h->non_got_ref
5464 && !h->def_regular)
5465 {
5466 /* Make sure this symbol is output as a dynamic symbol.
5467 Undefined weak syms won't yet be marked as dynamic. */
5468 if (h->dynindx == -1
5469 && !h->forced_local)
5470 {
5471 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5472 return FALSE;
5473 }
5474
5475 /* If that succeeded, we know we'll be keeping all the
5476 relocs. */
5477 if (h->dynindx != -1)
5478 goto keep;
5479 }
5480
5481 eh->dyn_relocs = NULL;
5482
5483 keep: ;
5484 }
5485
5486 /* Finally, allocate space. */
5487 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5488 {
5489 asection *sreloc = elf_section_data (p->sec)->sreloc;
5490 if (!htab->elf.dynamic_sections_created)
5491 sreloc = htab->reliplt;
5492 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5493 }
5494
5495 return TRUE;
5496 }
5497
5498 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5499 read-only sections. */
5500
5501 static bfd_boolean
5502 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5503 {
5504 if (h->root.type == bfd_link_hash_indirect)
5505 return TRUE;
5506
5507 if (h->root.type == bfd_link_hash_warning)
5508 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5509
5510 if (readonly_dynrelocs (h))
5511 {
5512 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5513
5514 /* Not an error, just cut short the traversal. */
5515 return FALSE;
5516 }
5517 return TRUE;
5518 }
5519
5520 /* Set the sizes of the dynamic sections. */
5521
5522 static bfd_boolean
5523 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5524 struct bfd_link_info *info)
5525 {
5526 struct ppc_elf_link_hash_table *htab;
5527 asection *s;
5528 bfd_boolean relocs;
5529 bfd *ibfd;
5530
5531 #ifdef DEBUG
5532 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5533 #endif
5534
5535 htab = ppc_elf_hash_table (info);
5536 BFD_ASSERT (htab->elf.dynobj != NULL);
5537
5538 if (elf_hash_table (info)->dynamic_sections_created)
5539 {
5540 /* Set the contents of the .interp section to the interpreter. */
5541 if (info->executable)
5542 {
5543 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5544 BFD_ASSERT (s != NULL);
5545 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5546 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5547 }
5548 }
5549
5550 if (htab->plt_type == PLT_OLD)
5551 htab->got_header_size = 16;
5552 else if (htab->plt_type == PLT_NEW)
5553 htab->got_header_size = 12;
5554
5555 /* Set up .got offsets for local syms, and space for local dynamic
5556 relocs. */
5557 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5558 {
5559 bfd_signed_vma *local_got;
5560 bfd_signed_vma *end_local_got;
5561 struct plt_entry **local_plt;
5562 struct plt_entry **end_local_plt;
5563 char *lgot_masks;
5564 bfd_size_type locsymcount;
5565 Elf_Internal_Shdr *symtab_hdr;
5566
5567 if (!is_ppc_elf (ibfd))
5568 continue;
5569
5570 for (s = ibfd->sections; s != NULL; s = s->next)
5571 {
5572 struct elf_dyn_relocs *p;
5573
5574 for (p = ((struct elf_dyn_relocs *)
5575 elf_section_data (s)->local_dynrel);
5576 p != NULL;
5577 p = p->next)
5578 {
5579 if (!bfd_is_abs_section (p->sec)
5580 && bfd_is_abs_section (p->sec->output_section))
5581 {
5582 /* Input section has been discarded, either because
5583 it is a copy of a linkonce section or due to
5584 linker script /DISCARD/, so we'll be discarding
5585 the relocs too. */
5586 }
5587 else if (htab->is_vxworks
5588 && strcmp (p->sec->output_section->name,
5589 ".tls_vars") == 0)
5590 {
5591 /* Relocations in vxworks .tls_vars sections are
5592 handled specially by the loader. */
5593 }
5594 else if (p->count != 0)
5595 {
5596 asection *sreloc = elf_section_data (p->sec)->sreloc;
5597 if (!htab->elf.dynamic_sections_created)
5598 sreloc = htab->reliplt;
5599 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5600 if ((p->sec->output_section->flags
5601 & (SEC_READONLY | SEC_ALLOC))
5602 == (SEC_READONLY | SEC_ALLOC))
5603 info->flags |= DF_TEXTREL;
5604 }
5605 }
5606 }
5607
5608 local_got = elf_local_got_refcounts (ibfd);
5609 if (!local_got)
5610 continue;
5611
5612 symtab_hdr = &elf_symtab_hdr (ibfd);
5613 locsymcount = symtab_hdr->sh_info;
5614 end_local_got = local_got + locsymcount;
5615 local_plt = (struct plt_entry **) end_local_got;
5616 end_local_plt = local_plt + locsymcount;
5617 lgot_masks = (char *) end_local_plt;
5618
5619 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5620 if (*local_got > 0)
5621 {
5622 unsigned int need = 0;
5623 if ((*lgot_masks & TLS_TLS) != 0)
5624 {
5625 if ((*lgot_masks & TLS_GD) != 0)
5626 need += 8;
5627 if ((*lgot_masks & TLS_LD) != 0)
5628 htab->tlsld_got.refcount += 1;
5629 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5630 need += 4;
5631 if ((*lgot_masks & TLS_DTPREL) != 0)
5632 need += 4;
5633 }
5634 else
5635 need += 4;
5636 if (need == 0)
5637 *local_got = (bfd_vma) -1;
5638 else
5639 {
5640 *local_got = allocate_got (htab, need);
5641 if (info->shared)
5642 htab->relgot->size += (need
5643 * (sizeof (Elf32_External_Rela) / 4));
5644 }
5645 }
5646 else
5647 *local_got = (bfd_vma) -1;
5648
5649 if (htab->is_vxworks)
5650 continue;
5651
5652 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
5653 for (; local_plt < end_local_plt; ++local_plt)
5654 {
5655 struct plt_entry *ent;
5656 bfd_boolean doneone = FALSE;
5657 bfd_vma plt_offset = 0, glink_offset = 0;
5658
5659 for (ent = *local_plt; ent != NULL; ent = ent->next)
5660 if (ent->plt.refcount > 0)
5661 {
5662 s = htab->iplt;
5663
5664 if (!doneone)
5665 {
5666 plt_offset = s->size;
5667 s->size += 4;
5668 }
5669 ent->plt.offset = plt_offset;
5670
5671 s = htab->glink;
5672 if (!doneone || info->shared)
5673 {
5674 glink_offset = s->size;
5675 s->size += GLINK_ENTRY_SIZE;
5676 }
5677 ent->glink_offset = glink_offset;
5678
5679 if (!doneone)
5680 {
5681 htab->reliplt->size += sizeof (Elf32_External_Rela);
5682 doneone = TRUE;
5683 }
5684 }
5685 else
5686 ent->plt.offset = (bfd_vma) -1;
5687 }
5688 }
5689
5690 /* Allocate space for global sym dynamic relocs. */
5691 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5692
5693 if (htab->tlsld_got.refcount > 0)
5694 {
5695 htab->tlsld_got.offset = allocate_got (htab, 8);
5696 if (info->shared)
5697 htab->relgot->size += sizeof (Elf32_External_Rela);
5698 }
5699 else
5700 htab->tlsld_got.offset = (bfd_vma) -1;
5701
5702 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5703 {
5704 unsigned int g_o_t = 32768;
5705
5706 /* If we haven't allocated the header, do so now. When we get here,
5707 for old plt/got the got size will be 0 to 32764 (not allocated),
5708 or 32780 to 65536 (header allocated). For new plt/got, the
5709 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5710 if (htab->got->size <= 32768)
5711 {
5712 g_o_t = htab->got->size;
5713 if (htab->plt_type == PLT_OLD)
5714 g_o_t += 4;
5715 htab->got->size += htab->got_header_size;
5716 }
5717
5718 htab->elf.hgot->root.u.def.value = g_o_t;
5719 }
5720 if (info->shared)
5721 {
5722 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
5723 if (sda != NULL
5724 && !(sda->root.type == bfd_link_hash_defined
5725 || sda->root.type == bfd_link_hash_defweak))
5726 {
5727 sda->root.type = bfd_link_hash_defined;
5728 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
5729 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
5730 }
5731 }
5732
5733 if (htab->glink != NULL
5734 && htab->glink->size != 0
5735 && htab->elf.dynamic_sections_created)
5736 {
5737 htab->glink_pltresolve = htab->glink->size;
5738 /* Space for the branch table. */
5739 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5740 /* Pad out to align the start of PLTresolve. */
5741 htab->glink->size += -htab->glink->size & 15;
5742 htab->glink->size += GLINK_PLTRESOLVE;
5743
5744 if (htab->emit_stub_syms)
5745 {
5746 struct elf_link_hash_entry *sh;
5747 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5748 TRUE, FALSE, FALSE);
5749 if (sh == NULL)
5750 return FALSE;
5751 if (sh->root.type == bfd_link_hash_new)
5752 {
5753 sh->root.type = bfd_link_hash_defined;
5754 sh->root.u.def.section = htab->glink;
5755 sh->root.u.def.value = htab->glink_pltresolve;
5756 sh->ref_regular = 1;
5757 sh->def_regular = 1;
5758 sh->ref_regular_nonweak = 1;
5759 sh->forced_local = 1;
5760 sh->non_elf = 0;
5761 }
5762 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5763 TRUE, FALSE, FALSE);
5764 if (sh == NULL)
5765 return FALSE;
5766 if (sh->root.type == bfd_link_hash_new)
5767 {
5768 sh->root.type = bfd_link_hash_defined;
5769 sh->root.u.def.section = htab->glink;
5770 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5771 sh->ref_regular = 1;
5772 sh->def_regular = 1;
5773 sh->ref_regular_nonweak = 1;
5774 sh->forced_local = 1;
5775 sh->non_elf = 0;
5776 }
5777 }
5778 }
5779
5780 /* We've now determined the sizes of the various dynamic sections.
5781 Allocate memory for them. */
5782 relocs = FALSE;
5783 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5784 {
5785 bfd_boolean strip_section = TRUE;
5786
5787 if ((s->flags & SEC_LINKER_CREATED) == 0)
5788 continue;
5789
5790 if (s == htab->plt
5791 || s == htab->got)
5792 {
5793 /* We'd like to strip these sections if they aren't needed, but if
5794 we've exported dynamic symbols from them we must leave them.
5795 It's too late to tell BFD to get rid of the symbols. */
5796 if (htab->elf.hplt != NULL)
5797 strip_section = FALSE;
5798 /* Strip this section if we don't need it; see the
5799 comment below. */
5800 }
5801 else if (s == htab->iplt
5802 || s == htab->glink
5803 || s == htab->sgotplt
5804 || s == htab->sbss
5805 || s == htab->dynbss
5806 || s == htab->dynsbss
5807 || s == htab->sdata[0].section
5808 || s == htab->sdata[1].section)
5809 {
5810 /* Strip these too. */
5811 }
5812 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5813 {
5814 if (s->size != 0)
5815 {
5816 /* Remember whether there are any relocation sections. */
5817 relocs = TRUE;
5818
5819 /* We use the reloc_count field as a counter if we need
5820 to copy relocs into the output file. */
5821 s->reloc_count = 0;
5822 }
5823 }
5824 else
5825 {
5826 /* It's not one of our sections, so don't allocate space. */
5827 continue;
5828 }
5829
5830 if (s->size == 0 && strip_section)
5831 {
5832 /* If we don't need this section, strip it from the
5833 output file. This is mostly to handle .rela.bss and
5834 .rela.plt. We must create both sections in
5835 create_dynamic_sections, because they must be created
5836 before the linker maps input sections to output
5837 sections. The linker does that before
5838 adjust_dynamic_symbol is called, and it is that
5839 function which decides whether anything needs to go
5840 into these sections. */
5841 s->flags |= SEC_EXCLUDE;
5842 continue;
5843 }
5844
5845 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5846 continue;
5847
5848 /* Allocate memory for the section contents. */
5849 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5850 if (s->contents == NULL)
5851 return FALSE;
5852 }
5853
5854 if (htab->elf.dynamic_sections_created)
5855 {
5856 /* Add some entries to the .dynamic section. We fill in the
5857 values later, in ppc_elf_finish_dynamic_sections, but we
5858 must add the entries now so that we get the correct size for
5859 the .dynamic section. The DT_DEBUG entry is filled in by the
5860 dynamic linker and used by the debugger. */
5861 #define add_dynamic_entry(TAG, VAL) \
5862 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5863
5864 if (info->executable)
5865 {
5866 if (!add_dynamic_entry (DT_DEBUG, 0))
5867 return FALSE;
5868 }
5869
5870 if (htab->plt != NULL && htab->plt->size != 0)
5871 {
5872 if (!add_dynamic_entry (DT_PLTGOT, 0)
5873 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5874 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5875 || !add_dynamic_entry (DT_JMPREL, 0))
5876 return FALSE;
5877 }
5878
5879 if (htab->glink != NULL && htab->glink->size != 0)
5880 {
5881 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5882 return FALSE;
5883 if (!htab->no_tls_get_addr_opt
5884 && htab->tls_get_addr != NULL
5885 && htab->tls_get_addr->plt.plist != NULL
5886 && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
5887 return FALSE;
5888 }
5889
5890 if (relocs)
5891 {
5892 if (!add_dynamic_entry (DT_RELA, 0)
5893 || !add_dynamic_entry (DT_RELASZ, 0)
5894 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5895 return FALSE;
5896 }
5897
5898 /* If any dynamic relocs apply to a read-only section, then we
5899 need a DT_TEXTREL entry. */
5900 if ((info->flags & DF_TEXTREL) == 0)
5901 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5902 info);
5903
5904 if ((info->flags & DF_TEXTREL) != 0)
5905 {
5906 if (!add_dynamic_entry (DT_TEXTREL, 0))
5907 return FALSE;
5908 }
5909 if (htab->is_vxworks
5910 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5911 return FALSE;
5912 }
5913 #undef add_dynamic_entry
5914
5915 return TRUE;
5916 }
5917
5918 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5919
5920 static bfd_boolean
5921 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5922 {
5923 if (h->plt.plist != NULL
5924 && !h->def_regular
5925 && (!h->pointer_equality_needed
5926 || !h->ref_regular_nonweak))
5927 return FALSE;
5928
5929 return _bfd_elf_hash_symbol (h);
5930 }
5931 \f
5932 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5933
5934 /* Relaxation trampolines. r12 is available for clobbering (r11, is
5935 used for some functions that are allowed to break the ABI). */
5936 static const int shared_stub_entry[] =
5937 {
5938 0x7c0802a6, /* mflr 0 */
5939 0x429f0005, /* bcl 20, 31, .Lxxx */
5940 0x7d8802a6, /* mflr 12 */
5941 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
5942 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
5943 0x7c0803a6, /* mtlr 0 */
5944 0x7d8903a6, /* mtctr 12 */
5945 0x4e800420, /* bctr */
5946 };
5947
5948 static const int stub_entry[] =
5949 {
5950 0x3d800000, /* lis 12,xxx@ha */
5951 0x398c0000, /* addi 12,12,xxx@l */
5952 0x7d8903a6, /* mtctr 12 */
5953 0x4e800420, /* bctr */
5954 };
5955
5956 static bfd_boolean
5957 ppc_elf_relax_section (bfd *abfd,
5958 asection *isec,
5959 struct bfd_link_info *link_info,
5960 bfd_boolean *again)
5961 {
5962 struct one_fixup
5963 {
5964 struct one_fixup *next;
5965 asection *tsec;
5966 /* Final link, can use the symbol offset. For a
5967 relocatable link we use the symbol's index. */
5968 bfd_vma toff;
5969 bfd_vma trampoff;
5970 };
5971
5972 Elf_Internal_Shdr *symtab_hdr;
5973 bfd_byte *contents = NULL;
5974 Elf_Internal_Sym *isymbuf = NULL;
5975 Elf_Internal_Rela *internal_relocs = NULL;
5976 Elf_Internal_Rela *irel, *irelend;
5977 struct one_fixup *fixups = NULL;
5978 unsigned changes = 0;
5979 struct ppc_elf_link_hash_table *htab;
5980 bfd_size_type trampoff;
5981 asection *got2;
5982 bfd_boolean maybe_pasted;
5983
5984 *again = FALSE;
5985
5986 /* Nothing to do if there are no relocations, and no need to do
5987 anything with non-alloc or non-code sections. */
5988 if ((isec->flags & SEC_ALLOC) == 0
5989 || (isec->flags & SEC_CODE) == 0
5990 || (isec->flags & SEC_RELOC) == 0
5991 || isec->reloc_count == 0)
5992 return TRUE;
5993
5994 /* We cannot represent the required PIC relocs in the output, so don't
5995 do anything. The linker doesn't support mixing -shared and -r
5996 anyway. */
5997 if (link_info->relocatable && link_info->shared)
5998 return TRUE;
5999
6000 trampoff = (isec->size + 3) & (bfd_vma) -4;
6001 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6002 || strcmp (isec->output_section->name, ".fini") == 0);
6003 /* Space for a branch around any trampolines. */
6004 if (maybe_pasted)
6005 trampoff += 4;
6006
6007 symtab_hdr = &elf_symtab_hdr (abfd);
6008
6009 /* Get a copy of the native relocations. */
6010 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6011 link_info->keep_memory);
6012 if (internal_relocs == NULL)
6013 goto error_return;
6014
6015 htab = ppc_elf_hash_table (link_info);
6016 got2 = bfd_get_section_by_name (abfd, ".got2");
6017
6018 irelend = internal_relocs + isec->reloc_count;
6019 for (irel = internal_relocs; irel < irelend; irel++)
6020 {
6021 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6022 bfd_vma toff, roff;
6023 asection *tsec;
6024 struct one_fixup *f;
6025 size_t insn_offset = 0;
6026 bfd_vma max_branch_offset, val;
6027 bfd_byte *hit_addr;
6028 unsigned long t0;
6029 struct elf_link_hash_entry *h;
6030 struct plt_entry **plist;
6031 unsigned char sym_type;
6032
6033 switch (r_type)
6034 {
6035 case R_PPC_REL24:
6036 case R_PPC_LOCAL24PC:
6037 case R_PPC_PLTREL24:
6038 max_branch_offset = 1 << 25;
6039 break;
6040
6041 case R_PPC_REL14:
6042 case R_PPC_REL14_BRTAKEN:
6043 case R_PPC_REL14_BRNTAKEN:
6044 max_branch_offset = 1 << 15;
6045 break;
6046
6047 default:
6048 continue;
6049 }
6050
6051 /* Get the value of the symbol referred to by the reloc. */
6052 h = NULL;
6053 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6054 {
6055 /* A local symbol. */
6056 Elf_Internal_Sym *isym;
6057
6058 /* Read this BFD's local symbols. */
6059 if (isymbuf == NULL)
6060 {
6061 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6062 if (isymbuf == NULL)
6063 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6064 symtab_hdr->sh_info, 0,
6065 NULL, NULL, NULL);
6066 if (isymbuf == 0)
6067 goto error_return;
6068 }
6069 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6070 if (isym->st_shndx == SHN_UNDEF)
6071 tsec = bfd_und_section_ptr;
6072 else if (isym->st_shndx == SHN_ABS)
6073 tsec = bfd_abs_section_ptr;
6074 else if (isym->st_shndx == SHN_COMMON)
6075 tsec = bfd_com_section_ptr;
6076 else
6077 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6078
6079 toff = isym->st_value;
6080 sym_type = ELF_ST_TYPE (isym->st_info);
6081 }
6082 else
6083 {
6084 /* Global symbol handling. */
6085 unsigned long indx;
6086
6087 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6088 h = elf_sym_hashes (abfd)[indx];
6089
6090 while (h->root.type == bfd_link_hash_indirect
6091 || h->root.type == bfd_link_hash_warning)
6092 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6093
6094 if (h->root.type == bfd_link_hash_defined
6095 || h->root.type == bfd_link_hash_defweak)
6096 {
6097 tsec = h->root.u.def.section;
6098 toff = h->root.u.def.value;
6099 }
6100 else if (h->root.type == bfd_link_hash_undefined
6101 || h->root.type == bfd_link_hash_undefweak)
6102 {
6103 tsec = bfd_und_section_ptr;
6104 toff = link_info->relocatable ? indx : 0;
6105 }
6106 else
6107 continue;
6108
6109 sym_type = h->type;
6110 }
6111
6112 /* The condition here under which we call find_plt_ent must
6113 match that in relocate_section. If we call find_plt_ent here
6114 but not in relocate_section, or vice versa, then the branch
6115 destination used here may be incorrect. */
6116 plist = NULL;
6117 if (h != NULL)
6118 {
6119 /* We know is_branch_reloc (r_type) is true. */
6120 if (h->type == STT_GNU_IFUNC
6121 || r_type == R_PPC_PLTREL24)
6122 plist = &h->plt.plist;
6123 }
6124 else if (sym_type == STT_GNU_IFUNC
6125 && elf_local_got_offsets (abfd) != NULL)
6126 {
6127 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6128 struct plt_entry **local_plt = (struct plt_entry **)
6129 (local_got_offsets + symtab_hdr->sh_info);
6130 plist = local_plt + ELF32_R_SYM (irel->r_info);
6131 }
6132 if (plist != NULL)
6133 {
6134 bfd_vma addend = 0;
6135 struct plt_entry *ent;
6136
6137 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6138 addend = irel->r_addend;
6139 ent = find_plt_ent (plist, got2, addend);
6140 if (ent != NULL)
6141 {
6142 if (htab->plt_type == PLT_NEW
6143 || h == NULL
6144 || !htab->elf.dynamic_sections_created
6145 || h->dynindx == -1)
6146 {
6147 tsec = htab->glink;
6148 toff = ent->glink_offset;
6149 }
6150 else
6151 {
6152 tsec = htab->plt;
6153 toff = ent->plt.offset;
6154 }
6155 }
6156 }
6157
6158 /* If the branch and target are in the same section, you have
6159 no hope of adding stubs. We'll error out later should the
6160 branch overflow. */
6161 if (tsec == isec)
6162 continue;
6163
6164 /* There probably isn't any reason to handle symbols in
6165 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6166 attribute for a code section, and we are only looking at
6167 branches. However, implement it correctly here as a
6168 reference for other target relax_section functions. */
6169 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
6170 {
6171 /* At this stage in linking, no SEC_MERGE symbol has been
6172 adjusted, so all references to such symbols need to be
6173 passed through _bfd_merged_section_offset. (Later, in
6174 relocate_section, all SEC_MERGE symbols *except* for
6175 section symbols have been adjusted.)
6176
6177 gas may reduce relocations against symbols in SEC_MERGE
6178 sections to a relocation against the section symbol when
6179 the original addend was zero. When the reloc is against
6180 a section symbol we should include the addend in the
6181 offset passed to _bfd_merged_section_offset, since the
6182 location of interest is the original symbol. On the
6183 other hand, an access to "sym+addend" where "sym" is not
6184 a section symbol should not include the addend; Such an
6185 access is presumed to be an offset from "sym"; The
6186 location of interest is just "sym". */
6187 if (sym_type == STT_SECTION)
6188 toff += irel->r_addend;
6189
6190 toff = _bfd_merged_section_offset (abfd, &tsec,
6191 elf_section_data (tsec)->sec_info,
6192 toff);
6193
6194 if (sym_type != STT_SECTION)
6195 toff += irel->r_addend;
6196 }
6197 /* PLTREL24 addends are special. */
6198 else if (r_type != R_PPC_PLTREL24)
6199 toff += irel->r_addend;
6200
6201 /* Attempted -shared link of non-pic code loses. */
6202 if (tsec->output_section == NULL)
6203 continue;
6204
6205 roff = irel->r_offset;
6206
6207 /* If the branch is in range, no need to do anything. */
6208 if (tsec != bfd_und_section_ptr
6209 && (!link_info->relocatable
6210 /* A relocatable link may have sections moved during
6211 final link, so do not presume they remain in range. */
6212 || tsec->output_section == isec->output_section))
6213 {
6214 bfd_vma symaddr, reladdr;
6215
6216 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6217 reladdr = isec->output_section->vma + isec->output_offset + roff;
6218 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6219 continue;
6220 }
6221
6222 /* Look for an existing fixup to this address. */
6223 for (f = fixups; f ; f = f->next)
6224 if (f->tsec == tsec && f->toff == toff)
6225 break;
6226
6227 if (f == NULL)
6228 {
6229 size_t size;
6230 unsigned long stub_rtype;
6231
6232 val = trampoff - roff;
6233 if (val >= max_branch_offset)
6234 /* Oh dear, we can't reach a trampoline. Don't try to add
6235 one. We'll report an error later. */
6236 continue;
6237
6238 if (link_info->shared)
6239 {
6240 size = 4 * ARRAY_SIZE (shared_stub_entry);
6241 insn_offset = 12;
6242 }
6243 else
6244 {
6245 size = 4 * ARRAY_SIZE (stub_entry);
6246 insn_offset = 0;
6247 }
6248 stub_rtype = R_PPC_RELAX;
6249 if (tsec == htab->plt
6250 || tsec == htab->glink)
6251 {
6252 stub_rtype = R_PPC_RELAX_PLT;
6253 if (r_type == R_PPC_PLTREL24)
6254 stub_rtype = R_PPC_RELAX_PLTREL24;
6255 }
6256
6257 /* Hijack the old relocation. Since we need two
6258 relocations for this use a "composite" reloc. */
6259 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6260 stub_rtype);
6261 irel->r_offset = trampoff + insn_offset;
6262 if (r_type == R_PPC_PLTREL24
6263 && stub_rtype != R_PPC_RELAX_PLTREL24)
6264 irel->r_addend = 0;
6265
6266 /* Record the fixup so we don't do it again this section. */
6267 f = bfd_malloc (sizeof (*f));
6268 f->next = fixups;
6269 f->tsec = tsec;
6270 f->toff = toff;
6271 f->trampoff = trampoff;
6272 fixups = f;
6273
6274 trampoff += size;
6275 changes++;
6276 }
6277 else
6278 {
6279 val = f->trampoff - roff;
6280 if (val >= max_branch_offset)
6281 continue;
6282
6283 /* Nop out the reloc, since we're finalizing things here. */
6284 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6285 }
6286
6287 /* Get the section contents. */
6288 if (contents == NULL)
6289 {
6290 /* Get cached copy if it exists. */
6291 if (elf_section_data (isec)->this_hdr.contents != NULL)
6292 contents = elf_section_data (isec)->this_hdr.contents;
6293 else
6294 {
6295 /* Go get them off disk. */
6296 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6297 goto error_return;
6298 }
6299 }
6300
6301 /* Fix up the existing branch to hit the trampoline. */
6302 hit_addr = contents + roff;
6303 switch (r_type)
6304 {
6305 case R_PPC_REL24:
6306 case R_PPC_LOCAL24PC:
6307 case R_PPC_PLTREL24:
6308 t0 = bfd_get_32 (abfd, hit_addr);
6309 t0 &= ~0x3fffffc;
6310 t0 |= val & 0x3fffffc;
6311 bfd_put_32 (abfd, t0, hit_addr);
6312 break;
6313
6314 case R_PPC_REL14:
6315 case R_PPC_REL14_BRTAKEN:
6316 case R_PPC_REL14_BRNTAKEN:
6317 t0 = bfd_get_32 (abfd, hit_addr);
6318 t0 &= ~0xfffc;
6319 t0 |= val & 0xfffc;
6320 bfd_put_32 (abfd, t0, hit_addr);
6321 break;
6322 }
6323 }
6324
6325 /* Write out the trampolines. */
6326 if (fixups != NULL)
6327 {
6328 const int *stub;
6329 bfd_byte *dest;
6330 int i, size;
6331
6332 do
6333 {
6334 struct one_fixup *f = fixups;
6335 fixups = fixups->next;
6336 free (f);
6337 }
6338 while (fixups);
6339
6340 contents = bfd_realloc_or_free (contents, trampoff);
6341 if (contents == NULL)
6342 goto error_return;
6343
6344 isec->size = (isec->size + 3) & (bfd_vma) -4;
6345 dest = contents + isec->size;
6346 /* Branch around the trampolines. */
6347 if (maybe_pasted)
6348 {
6349 bfd_vma val = B + trampoff - isec->size;
6350 bfd_put_32 (abfd, val, dest);
6351 dest += 4;
6352 }
6353 isec->size = trampoff;
6354
6355 if (link_info->shared)
6356 {
6357 stub = shared_stub_entry;
6358 size = ARRAY_SIZE (shared_stub_entry);
6359 }
6360 else
6361 {
6362 stub = stub_entry;
6363 size = ARRAY_SIZE (stub_entry);
6364 }
6365
6366 i = 0;
6367 while (dest < contents + trampoff)
6368 {
6369 bfd_put_32 (abfd, stub[i], dest);
6370 i++;
6371 if (i == size)
6372 i = 0;
6373 dest += 4;
6374 }
6375 BFD_ASSERT (i == 0);
6376 }
6377
6378 if (isymbuf != NULL
6379 && symtab_hdr->contents != (unsigned char *) isymbuf)
6380 {
6381 if (! link_info->keep_memory)
6382 free (isymbuf);
6383 else
6384 {
6385 /* Cache the symbols for elf_link_input_bfd. */
6386 symtab_hdr->contents = (unsigned char *) isymbuf;
6387 }
6388 }
6389
6390 if (contents != NULL
6391 && elf_section_data (isec)->this_hdr.contents != contents)
6392 {
6393 if (!changes && !link_info->keep_memory)
6394 free (contents);
6395 else
6396 {
6397 /* Cache the section contents for elf_link_input_bfd. */
6398 elf_section_data (isec)->this_hdr.contents = contents;
6399 }
6400 }
6401
6402 if (changes != 0)
6403 {
6404 /* Append sufficient NOP relocs so we can write out relocation
6405 information for the trampolines. */
6406 Elf_Internal_Shdr *rel_hdr;
6407 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6408 * sizeof (*new_relocs));
6409 unsigned ix;
6410
6411 if (!new_relocs)
6412 goto error_return;
6413 memcpy (new_relocs, internal_relocs,
6414 isec->reloc_count * sizeof (*new_relocs));
6415 for (ix = changes; ix--;)
6416 {
6417 irel = new_relocs + ix + isec->reloc_count;
6418
6419 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6420 }
6421 if (internal_relocs != elf_section_data (isec)->relocs)
6422 free (internal_relocs);
6423 elf_section_data (isec)->relocs = new_relocs;
6424 isec->reloc_count += changes;
6425 rel_hdr = _bfd_elf_single_rel_hdr (isec);
6426 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
6427 }
6428 else if (elf_section_data (isec)->relocs != internal_relocs)
6429 free (internal_relocs);
6430
6431 *again = changes != 0;
6432 if (!*again && link_info->relocatable)
6433 {
6434 /* Convert the internal relax relocs to external form. */
6435 for (irel = internal_relocs; irel < irelend; irel++)
6436 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
6437 {
6438 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6439
6440 /* Rewrite the reloc and convert one of the trailing nop
6441 relocs to describe this relocation. */
6442 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6443 /* The relocs are at the bottom 2 bytes */
6444 irel[0].r_offset += 2;
6445 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6446 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6447 irel[1].r_offset += 4;
6448 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6449 irel++;
6450 }
6451 }
6452
6453 return TRUE;
6454
6455 error_return:
6456 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6457 free (isymbuf);
6458 if (contents != NULL
6459 && elf_section_data (isec)->this_hdr.contents != contents)
6460 free (contents);
6461 if (internal_relocs != NULL
6462 && elf_section_data (isec)->relocs != internal_relocs)
6463 free (internal_relocs);
6464 return FALSE;
6465 }
6466 \f
6467 /* What to do when ld finds relocations against symbols defined in
6468 discarded sections. */
6469
6470 static unsigned int
6471 ppc_elf_action_discarded (asection *sec)
6472 {
6473 if (strcmp (".fixup", sec->name) == 0)
6474 return 0;
6475
6476 if (strcmp (".got2", sec->name) == 0)
6477 return 0;
6478
6479 return _bfd_elf_default_action_discarded (sec);
6480 }
6481 \f
6482 /* Fill in the address for a pointer generated in a linker section. */
6483
6484 static bfd_vma
6485 elf_finish_pointer_linker_section (bfd *input_bfd,
6486 elf_linker_section_t *lsect,
6487 struct elf_link_hash_entry *h,
6488 bfd_vma relocation,
6489 const Elf_Internal_Rela *rel)
6490 {
6491 elf_linker_section_pointers_t *linker_section_ptr;
6492
6493 BFD_ASSERT (lsect != NULL);
6494
6495 if (h != NULL)
6496 {
6497 /* Handle global symbol. */
6498 struct ppc_elf_link_hash_entry *eh;
6499
6500 eh = (struct ppc_elf_link_hash_entry *) h;
6501 BFD_ASSERT (eh->elf.def_regular);
6502 linker_section_ptr = eh->linker_section_pointer;
6503 }
6504 else
6505 {
6506 /* Handle local symbol. */
6507 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6508
6509 BFD_ASSERT (is_ppc_elf (input_bfd));
6510 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6511 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6512 }
6513
6514 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6515 rel->r_addend,
6516 lsect);
6517 BFD_ASSERT (linker_section_ptr != NULL);
6518
6519 /* Offset will always be a multiple of four, so use the bottom bit
6520 as a "written" flag. */
6521 if ((linker_section_ptr->offset & 1) == 0)
6522 {
6523 bfd_put_32 (lsect->section->owner,
6524 relocation + linker_section_ptr->addend,
6525 lsect->section->contents + linker_section_ptr->offset);
6526 linker_section_ptr->offset += 1;
6527 }
6528
6529 relocation = (lsect->section->output_section->vma
6530 + lsect->section->output_offset
6531 + linker_section_ptr->offset - 1
6532 - SYM_VAL (lsect->sym));
6533
6534 #ifdef DEBUG
6535 fprintf (stderr,
6536 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6537 lsect->name, (long) relocation, (long) relocation);
6538 #endif
6539
6540 return relocation;
6541 }
6542
6543 #define PPC_LO(v) ((v) & 0xffff)
6544 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6545 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6546
6547 static void
6548 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
6549 struct bfd_link_info *info)
6550 {
6551 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6552 bfd *output_bfd = info->output_bfd;
6553 bfd_vma plt;
6554
6555 plt = ((ent->plt.offset & ~1)
6556 + plt_sec->output_section->vma
6557 + plt_sec->output_offset);
6558
6559 if (info->shared)
6560 {
6561 bfd_vma got = 0;
6562
6563 if (ent->addend >= 32768)
6564 got = (ent->addend
6565 + ent->sec->output_section->vma
6566 + ent->sec->output_offset);
6567 else if (htab->elf.hgot != NULL)
6568 got = SYM_VAL (htab->elf.hgot);
6569
6570 plt -= got;
6571
6572 if (plt + 0x8000 < 0x10000)
6573 {
6574 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6575 p += 4;
6576 bfd_put_32 (output_bfd, MTCTR_11, p);
6577 p += 4;
6578 bfd_put_32 (output_bfd, BCTR, p);
6579 p += 4;
6580 bfd_put_32 (output_bfd, NOP, p);
6581 p += 4;
6582 }
6583 else
6584 {
6585 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6586 p += 4;
6587 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6588 p += 4;
6589 bfd_put_32 (output_bfd, MTCTR_11, p);
6590 p += 4;
6591 bfd_put_32 (output_bfd, BCTR, p);
6592 p += 4;
6593 }
6594 }
6595 else
6596 {
6597 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6598 p += 4;
6599 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6600 p += 4;
6601 bfd_put_32 (output_bfd, MTCTR_11, p);
6602 p += 4;
6603 bfd_put_32 (output_bfd, BCTR, p);
6604 p += 4;
6605 }
6606 }
6607
6608 /* Return true if symbol is defined statically. */
6609
6610 static bfd_boolean
6611 is_static_defined (struct elf_link_hash_entry *h)
6612 {
6613 return ((h->root.type == bfd_link_hash_defined
6614 || h->root.type == bfd_link_hash_defweak)
6615 && h->root.u.def.section != NULL
6616 && h->root.u.def.section->output_section != NULL);
6617 }
6618
6619 /* If INSN is an opcode that may be used with an @tls operand, return
6620 the transformed insn for TLS optimisation, otherwise return 0. If
6621 REG is non-zero only match an insn with RB or RA equal to REG. */
6622
6623 unsigned int
6624 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
6625 {
6626 unsigned int rtra;
6627
6628 if ((insn & (0x3f << 26)) != 31 << 26)
6629 return 0;
6630
6631 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
6632 rtra = insn & ((1 << 26) - (1 << 16));
6633 else if (((insn >> 16) & 0x1f) == reg)
6634 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
6635 else
6636 return 0;
6637
6638 if ((insn & (0x3ff << 1)) == 266 << 1)
6639 /* add -> addi. */
6640 insn = 14 << 26;
6641 else if ((insn & (0x1f << 1)) == 23 << 1
6642 && ((insn & (0x1f << 6)) < 14 << 6
6643 || ((insn & (0x1f << 6)) >= 16 << 6
6644 && (insn & (0x1f << 6)) < 24 << 6)))
6645 /* load and store indexed -> dform. */
6646 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
6647 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
6648 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6649 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
6650 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
6651 /* lwax -> lwa. */
6652 insn = (58 << 26) | 2;
6653 else
6654 return 0;
6655 insn |= rtra;
6656 return insn;
6657 }
6658
6659 /* If INSN is an opcode that may be used with an @tprel operand, return
6660 the transformed insn for an undefined weak symbol, ie. with the
6661 thread pointer REG operand removed. Otherwise return 0. */
6662
6663 unsigned int
6664 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
6665 {
6666 if ((insn & (0x1f << 16)) == reg << 16
6667 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
6668 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
6669 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
6670 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
6671 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
6672 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
6673 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
6674 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
6675 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
6676 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
6677 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
6678 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
6679 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
6680 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
6681 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
6682 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
6683 && (insn & 3) != 1)
6684 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
6685 && ((insn & 3) == 0 || (insn & 3) == 3))))
6686 {
6687 insn &= ~(0x1f << 16);
6688 }
6689 else if ((insn & (0x1f << 21)) == reg << 21
6690 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
6691 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
6692 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
6693 {
6694 insn &= ~(0x1f << 21);
6695 insn |= (insn & (0x1f << 16)) << 5;
6696 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
6697 insn -= 2 >> 26; /* convert to ori,oris */
6698 }
6699 else
6700 insn = 0;
6701 return insn;
6702 }
6703
6704 /* The RELOCATE_SECTION function is called by the ELF backend linker
6705 to handle the relocations for a section.
6706
6707 The relocs are always passed as Rela structures; if the section
6708 actually uses Rel structures, the r_addend field will always be
6709 zero.
6710
6711 This function is responsible for adjust the section contents as
6712 necessary, and (if using Rela relocs and generating a
6713 relocatable output file) adjusting the reloc addend as
6714 necessary.
6715
6716 This function does not have to worry about setting the reloc
6717 address or the reloc symbol index.
6718
6719 LOCAL_SYMS is a pointer to the swapped in local symbols.
6720
6721 LOCAL_SECTIONS is an array giving the section in the input file
6722 corresponding to the st_shndx field of each local symbol.
6723
6724 The global hash table entry for the global symbols can be found
6725 via elf_sym_hashes (input_bfd).
6726
6727 When generating relocatable output, this function must handle
6728 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6729 going to be the section symbol corresponding to the output
6730 section, which means that the addend must be adjusted
6731 accordingly. */
6732
6733 static bfd_boolean
6734 ppc_elf_relocate_section (bfd *output_bfd,
6735 struct bfd_link_info *info,
6736 bfd *input_bfd,
6737 asection *input_section,
6738 bfd_byte *contents,
6739 Elf_Internal_Rela *relocs,
6740 Elf_Internal_Sym *local_syms,
6741 asection **local_sections)
6742 {
6743 Elf_Internal_Shdr *symtab_hdr;
6744 struct elf_link_hash_entry **sym_hashes;
6745 struct ppc_elf_link_hash_table *htab;
6746 Elf_Internal_Rela *rel;
6747 Elf_Internal_Rela *relend;
6748 Elf_Internal_Rela outrel;
6749 asection *got2, *sreloc = NULL;
6750 bfd_vma *local_got_offsets;
6751 bfd_boolean ret = TRUE;
6752 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6753 bfd_boolean is_vxworks_tls;
6754
6755 #ifdef DEBUG
6756 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6757 "%ld relocations%s",
6758 input_bfd, input_section,
6759 (long) input_section->reloc_count,
6760 (info->relocatable) ? " (relocatable)" : "");
6761 #endif
6762
6763 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6764
6765 /* Initialize howto table if not already done. */
6766 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6767 ppc_elf_howto_init ();
6768
6769 htab = ppc_elf_hash_table (info);
6770 local_got_offsets = elf_local_got_offsets (input_bfd);
6771 symtab_hdr = &elf_symtab_hdr (input_bfd);
6772 sym_hashes = elf_sym_hashes (input_bfd);
6773 /* We have to handle relocations in vxworks .tls_vars sections
6774 specially, because the dynamic loader is 'weird'. */
6775 is_vxworks_tls = (htab->is_vxworks && info->shared
6776 && !strcmp (input_section->output_section->name,
6777 ".tls_vars"));
6778 rel = relocs;
6779 relend = relocs + input_section->reloc_count;
6780 for (; rel < relend; rel++)
6781 {
6782 enum elf_ppc_reloc_type r_type;
6783 bfd_vma addend;
6784 bfd_reloc_status_type r;
6785 Elf_Internal_Sym *sym;
6786 asection *sec;
6787 struct elf_link_hash_entry *h;
6788 const char *sym_name;
6789 reloc_howto_type *howto;
6790 unsigned long r_symndx;
6791 bfd_vma relocation;
6792 bfd_vma branch_bit, from;
6793 bfd_boolean unresolved_reloc;
6794 bfd_boolean warned;
6795 unsigned int tls_type, tls_mask, tls_gd;
6796 struct plt_entry **ifunc;
6797
6798 r_type = ELF32_R_TYPE (rel->r_info);
6799 sym = NULL;
6800 sec = NULL;
6801 h = NULL;
6802 unresolved_reloc = FALSE;
6803 warned = FALSE;
6804 r_symndx = ELF32_R_SYM (rel->r_info);
6805
6806 if (r_symndx < symtab_hdr->sh_info)
6807 {
6808 sym = local_syms + r_symndx;
6809 sec = local_sections[r_symndx];
6810 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6811
6812 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6813 }
6814 else
6815 {
6816 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6817 r_symndx, symtab_hdr, sym_hashes,
6818 h, sec, relocation,
6819 unresolved_reloc, warned);
6820
6821 sym_name = h->root.root.string;
6822 }
6823
6824 if (sec != NULL && elf_discarded_section (sec))
6825 {
6826 /* For relocs against symbols from removed linkonce sections,
6827 or sections discarded by a linker script, we just want the
6828 section contents zeroed. Avoid any special processing. */
6829 howto = NULL;
6830 if (r_type < R_PPC_max)
6831 howto = ppc_elf_howto_table[r_type];
6832 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
6833 rel, relend, howto, contents);
6834 }
6835
6836 if (info->relocatable)
6837 {
6838 if (got2 != NULL
6839 && r_type == R_PPC_PLTREL24
6840 && rel->r_addend >= 32768)
6841 {
6842 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6843 addend specifies the GOT pointer offset within .got2. */
6844 rel->r_addend += got2->output_offset;
6845 }
6846 continue;
6847 }
6848
6849 /* TLS optimizations. Replace instruction sequences and relocs
6850 based on information we collected in tls_optimize. We edit
6851 RELOCS so that --emit-relocs will output something sensible
6852 for the final instruction stream. */
6853 tls_mask = 0;
6854 tls_gd = 0;
6855 if (h != NULL)
6856 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6857 else if (local_got_offsets != NULL)
6858 {
6859 struct plt_entry **local_plt;
6860 char *lgot_masks;
6861 local_plt
6862 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
6863 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
6864 tls_mask = lgot_masks[r_symndx];
6865 }
6866
6867 /* Ensure reloc mapping code below stays sane. */
6868 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6869 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6870 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6871 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6872 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6873 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6874 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6875 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6876 abort ();
6877 switch (r_type)
6878 {
6879 default:
6880 break;
6881
6882 case R_PPC_GOT_TPREL16:
6883 case R_PPC_GOT_TPREL16_LO:
6884 if ((tls_mask & TLS_TLS) != 0
6885 && (tls_mask & TLS_TPREL) == 0)
6886 {
6887 bfd_vma insn;
6888
6889 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6890 insn &= 31 << 21;
6891 insn |= 0x3c020000; /* addis 0,2,0 */
6892 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6893 r_type = R_PPC_TPREL16_HA;
6894 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6895 }
6896 break;
6897
6898 case R_PPC_TLS:
6899 if ((tls_mask & TLS_TLS) != 0
6900 && (tls_mask & TLS_TPREL) == 0)
6901 {
6902 bfd_vma insn;
6903
6904 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6905 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
6906 if (insn == 0)
6907 abort ();
6908 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6909 r_type = R_PPC_TPREL16_LO;
6910 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6911
6912 /* Was PPC_TLS which sits on insn boundary, now
6913 PPC_TPREL16_LO which is at low-order half-word. */
6914 rel->r_offset += d_offset;
6915 }
6916 break;
6917
6918 case R_PPC_GOT_TLSGD16_HI:
6919 case R_PPC_GOT_TLSGD16_HA:
6920 tls_gd = TLS_TPRELGD;
6921 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6922 goto tls_gdld_hi;
6923 break;
6924
6925 case R_PPC_GOT_TLSLD16_HI:
6926 case R_PPC_GOT_TLSLD16_HA:
6927 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6928 {
6929 tls_gdld_hi:
6930 if ((tls_mask & tls_gd) != 0)
6931 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6932 + R_PPC_GOT_TPREL16);
6933 else
6934 {
6935 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6936 rel->r_offset -= d_offset;
6937 r_type = R_PPC_NONE;
6938 }
6939 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6940 }
6941 break;
6942
6943 case R_PPC_GOT_TLSGD16:
6944 case R_PPC_GOT_TLSGD16_LO:
6945 tls_gd = TLS_TPRELGD;
6946 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
6947 goto tls_ldgd_opt;
6948 break;
6949
6950 case R_PPC_GOT_TLSLD16:
6951 case R_PPC_GOT_TLSLD16_LO:
6952 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
6953 {
6954 unsigned int insn1, insn2;
6955 bfd_vma offset;
6956
6957 tls_ldgd_opt:
6958 offset = (bfd_vma) -1;
6959 /* If not using the newer R_PPC_TLSGD/LD to mark
6960 __tls_get_addr calls, we must trust that the call
6961 stays with its arg setup insns, ie. that the next
6962 reloc is the __tls_get_addr call associated with
6963 the current reloc. Edit both insns. */
6964 if (input_section->has_tls_get_addr_call
6965 && rel + 1 < relend
6966 && branch_reloc_hash_match (input_bfd, rel + 1,
6967 htab->tls_get_addr))
6968 offset = rel[1].r_offset;
6969 if ((tls_mask & tls_gd) != 0)
6970 {
6971 /* IE */
6972 insn1 = bfd_get_32 (output_bfd,
6973 contents + rel->r_offset - d_offset);
6974 insn1 &= (1 << 26) - 1;
6975 insn1 |= 32 << 26; /* lwz */
6976 if (offset != (bfd_vma) -1)
6977 {
6978 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
6979 insn2 = 0x7c631214; /* add 3,3,2 */
6980 bfd_put_32 (output_bfd, insn2, contents + offset);
6981 }
6982 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6983 + R_PPC_GOT_TPREL16);
6984 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6985 }
6986 else
6987 {
6988 /* LE */
6989 insn1 = 0x3c620000; /* addis 3,2,0 */
6990 if (tls_gd == 0)
6991 {
6992 /* Was an LD reloc. */
6993 for (r_symndx = 0;
6994 r_symndx < symtab_hdr->sh_info;
6995 r_symndx++)
6996 if (local_sections[r_symndx] == sec)
6997 break;
6998 if (r_symndx >= symtab_hdr->sh_info)
6999 r_symndx = STN_UNDEF;
7000 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7001 if (r_symndx != STN_UNDEF)
7002 rel->r_addend -= (local_syms[r_symndx].st_value
7003 + sec->output_offset
7004 + sec->output_section->vma);
7005 }
7006 r_type = R_PPC_TPREL16_HA;
7007 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7008 if (offset != (bfd_vma) -1)
7009 {
7010 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7011 rel[1].r_offset = offset + d_offset;
7012 rel[1].r_addend = rel->r_addend;
7013 insn2 = 0x38630000; /* addi 3,3,0 */
7014 bfd_put_32 (output_bfd, insn2, contents + offset);
7015 }
7016 }
7017 bfd_put_32 (output_bfd, insn1,
7018 contents + rel->r_offset - d_offset);
7019 if (tls_gd == 0)
7020 {
7021 /* We changed the symbol on an LD reloc. Start over
7022 in order to get h, sym, sec etc. right. */
7023 rel--;
7024 continue;
7025 }
7026 }
7027 break;
7028
7029 case R_PPC_TLSGD:
7030 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7031 {
7032 unsigned int insn2;
7033 bfd_vma offset = rel->r_offset;
7034
7035 if ((tls_mask & TLS_TPRELGD) != 0)
7036 {
7037 /* IE */
7038 r_type = R_PPC_NONE;
7039 insn2 = 0x7c631214; /* add 3,3,2 */
7040 }
7041 else
7042 {
7043 /* LE */
7044 r_type = R_PPC_TPREL16_LO;
7045 rel->r_offset += d_offset;
7046 insn2 = 0x38630000; /* addi 3,3,0 */
7047 }
7048 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7049 bfd_put_32 (output_bfd, insn2, contents + offset);
7050 /* Zap the reloc on the _tls_get_addr call too. */
7051 BFD_ASSERT (offset == rel[1].r_offset);
7052 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7053 }
7054 break;
7055
7056 case R_PPC_TLSLD:
7057 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7058 {
7059 unsigned int insn2;
7060
7061 for (r_symndx = 0;
7062 r_symndx < symtab_hdr->sh_info;
7063 r_symndx++)
7064 if (local_sections[r_symndx] == sec)
7065 break;
7066 if (r_symndx >= symtab_hdr->sh_info)
7067 r_symndx = STN_UNDEF;
7068 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7069 if (r_symndx != STN_UNDEF)
7070 rel->r_addend -= (local_syms[r_symndx].st_value
7071 + sec->output_offset
7072 + sec->output_section->vma);
7073
7074 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7075 rel->r_offset += d_offset;
7076 insn2 = 0x38630000; /* addi 3,3,0 */
7077 bfd_put_32 (output_bfd, insn2,
7078 contents + rel->r_offset - d_offset);
7079 /* Zap the reloc on the _tls_get_addr call too. */
7080 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7081 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7082 rel--;
7083 continue;
7084 }
7085 break;
7086 }
7087
7088 /* Handle other relocations that tweak non-addend part of insn. */
7089 branch_bit = 0;
7090 switch (r_type)
7091 {
7092 default:
7093 break;
7094
7095 /* Branch taken prediction relocations. */
7096 case R_PPC_ADDR14_BRTAKEN:
7097 case R_PPC_REL14_BRTAKEN:
7098 branch_bit = BRANCH_PREDICT_BIT;
7099 /* Fall thru */
7100
7101 /* Branch not taken prediction relocations. */
7102 case R_PPC_ADDR14_BRNTAKEN:
7103 case R_PPC_REL14_BRNTAKEN:
7104 {
7105 bfd_vma insn;
7106
7107 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7108 insn &= ~BRANCH_PREDICT_BIT;
7109 insn |= branch_bit;
7110
7111 from = (rel->r_offset
7112 + input_section->output_offset
7113 + input_section->output_section->vma);
7114
7115 /* Invert 'y' bit if not the default. */
7116 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7117 insn ^= BRANCH_PREDICT_BIT;
7118
7119 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7120 break;
7121 }
7122 }
7123
7124 ifunc = NULL;
7125 if (!htab->is_vxworks)
7126 {
7127 struct plt_entry *ent;
7128
7129 if (h != NULL)
7130 {
7131 if (h->type == STT_GNU_IFUNC)
7132 ifunc = &h->plt.plist;
7133 }
7134 else if (local_got_offsets != NULL
7135 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7136 {
7137 struct plt_entry **local_plt;
7138
7139 local_plt = (struct plt_entry **) (local_got_offsets
7140 + symtab_hdr->sh_info);
7141 ifunc = local_plt + r_symndx;
7142 }
7143
7144 ent = NULL;
7145 if (ifunc != NULL
7146 && (!info->shared
7147 || is_branch_reloc (r_type)))
7148 {
7149 addend = 0;
7150 if (r_type == R_PPC_PLTREL24 && info->shared)
7151 addend = rel->r_addend;
7152 ent = find_plt_ent (ifunc, got2, addend);
7153 }
7154 if (ent != NULL)
7155 {
7156 if (h == NULL && (ent->plt.offset & 1) == 0)
7157 {
7158 Elf_Internal_Rela rela;
7159 bfd_byte *loc;
7160
7161 rela.r_offset = (htab->iplt->output_section->vma
7162 + htab->iplt->output_offset
7163 + ent->plt.offset);
7164 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7165 rela.r_addend = relocation;
7166 loc = htab->reliplt->contents;
7167 loc += (htab->reliplt->reloc_count++
7168 * sizeof (Elf32_External_Rela));
7169 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7170
7171 ent->plt.offset |= 1;
7172 }
7173 if (h == NULL && (ent->glink_offset & 1) == 0)
7174 {
7175 unsigned char *p = ((unsigned char *) htab->glink->contents
7176 + ent->glink_offset);
7177 write_glink_stub (ent, htab->iplt, p, info);
7178 ent->glink_offset |= 1;
7179 }
7180
7181 unresolved_reloc = FALSE;
7182 if (htab->plt_type == PLT_NEW
7183 || !htab->elf.dynamic_sections_created
7184 || h == NULL)
7185 relocation = (htab->glink->output_section->vma
7186 + htab->glink->output_offset
7187 + (ent->glink_offset & ~1));
7188 else
7189 relocation = (htab->plt->output_section->vma
7190 + htab->plt->output_offset
7191 + ent->plt.offset);
7192 }
7193 }
7194
7195 addend = rel->r_addend;
7196 tls_type = 0;
7197 howto = NULL;
7198 if (r_type < R_PPC_max)
7199 howto = ppc_elf_howto_table[r_type];
7200 switch (r_type)
7201 {
7202 default:
7203 info->callbacks->einfo
7204 (_("%B: unknown relocation type %d for symbol %s\n"),
7205 input_bfd, (int) r_type, sym_name);
7206
7207 bfd_set_error (bfd_error_bad_value);
7208 ret = FALSE;
7209 continue;
7210
7211 case R_PPC_NONE:
7212 case R_PPC_TLS:
7213 case R_PPC_TLSGD:
7214 case R_PPC_TLSLD:
7215 case R_PPC_EMB_MRKREF:
7216 case R_PPC_GNU_VTINHERIT:
7217 case R_PPC_GNU_VTENTRY:
7218 continue;
7219
7220 /* GOT16 relocations. Like an ADDR16 using the symbol's
7221 address in the GOT as relocation value instead of the
7222 symbol's value itself. Also, create a GOT entry for the
7223 symbol and put the symbol value there. */
7224 case R_PPC_GOT_TLSGD16:
7225 case R_PPC_GOT_TLSGD16_LO:
7226 case R_PPC_GOT_TLSGD16_HI:
7227 case R_PPC_GOT_TLSGD16_HA:
7228 tls_type = TLS_TLS | TLS_GD;
7229 goto dogot;
7230
7231 case R_PPC_GOT_TLSLD16:
7232 case R_PPC_GOT_TLSLD16_LO:
7233 case R_PPC_GOT_TLSLD16_HI:
7234 case R_PPC_GOT_TLSLD16_HA:
7235 tls_type = TLS_TLS | TLS_LD;
7236 goto dogot;
7237
7238 case R_PPC_GOT_TPREL16:
7239 case R_PPC_GOT_TPREL16_LO:
7240 case R_PPC_GOT_TPREL16_HI:
7241 case R_PPC_GOT_TPREL16_HA:
7242 tls_type = TLS_TLS | TLS_TPREL;
7243 goto dogot;
7244
7245 case R_PPC_GOT_DTPREL16:
7246 case R_PPC_GOT_DTPREL16_LO:
7247 case R_PPC_GOT_DTPREL16_HI:
7248 case R_PPC_GOT_DTPREL16_HA:
7249 tls_type = TLS_TLS | TLS_DTPREL;
7250 goto dogot;
7251
7252 case R_PPC_GOT16:
7253 case R_PPC_GOT16_LO:
7254 case R_PPC_GOT16_HI:
7255 case R_PPC_GOT16_HA:
7256 tls_mask = 0;
7257 dogot:
7258 {
7259 /* Relocation is to the entry for this symbol in the global
7260 offset table. */
7261 bfd_vma off;
7262 bfd_vma *offp;
7263 unsigned long indx;
7264
7265 if (htab->got == NULL)
7266 abort ();
7267
7268 indx = 0;
7269 if (tls_type == (TLS_TLS | TLS_LD)
7270 && (h == NULL
7271 || !h->def_dynamic))
7272 offp = &htab->tlsld_got.offset;
7273 else if (h != NULL)
7274 {
7275 bfd_boolean dyn;
7276 dyn = htab->elf.dynamic_sections_created;
7277 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7278 || (info->shared
7279 && SYMBOL_REFERENCES_LOCAL (info, h)))
7280 /* This is actually a static link, or it is a
7281 -Bsymbolic link and the symbol is defined
7282 locally, or the symbol was forced to be local
7283 because of a version file. */
7284 ;
7285 else
7286 {
7287 indx = h->dynindx;
7288 unresolved_reloc = FALSE;
7289 }
7290 offp = &h->got.offset;
7291 }
7292 else
7293 {
7294 if (local_got_offsets == NULL)
7295 abort ();
7296 offp = &local_got_offsets[r_symndx];
7297 }
7298
7299 /* The offset must always be a multiple of 4. We use the
7300 least significant bit to record whether we have already
7301 processed this entry. */
7302 off = *offp;
7303 if ((off & 1) != 0)
7304 off &= ~1;
7305 else
7306 {
7307 unsigned int tls_m = (tls_mask
7308 & (TLS_LD | TLS_GD | TLS_DTPREL
7309 | TLS_TPREL | TLS_TPRELGD));
7310
7311 if (offp == &htab->tlsld_got.offset)
7312 tls_m = TLS_LD;
7313 else if (h == NULL
7314 || !h->def_dynamic)
7315 tls_m &= ~TLS_LD;
7316
7317 /* We might have multiple got entries for this sym.
7318 Initialize them all. */
7319 do
7320 {
7321 int tls_ty = 0;
7322
7323 if ((tls_m & TLS_LD) != 0)
7324 {
7325 tls_ty = TLS_TLS | TLS_LD;
7326 tls_m &= ~TLS_LD;
7327 }
7328 else if ((tls_m & TLS_GD) != 0)
7329 {
7330 tls_ty = TLS_TLS | TLS_GD;
7331 tls_m &= ~TLS_GD;
7332 }
7333 else if ((tls_m & TLS_DTPREL) != 0)
7334 {
7335 tls_ty = TLS_TLS | TLS_DTPREL;
7336 tls_m &= ~TLS_DTPREL;
7337 }
7338 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7339 {
7340 tls_ty = TLS_TLS | TLS_TPREL;
7341 tls_m = 0;
7342 }
7343
7344 /* Generate relocs for the dynamic linker. */
7345 if ((info->shared || indx != 0)
7346 && (offp == &htab->tlsld_got.offset
7347 || h == NULL
7348 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7349 || h->root.type != bfd_link_hash_undefweak))
7350 {
7351 asection *rsec = htab->relgot;
7352 bfd_byte * loc;
7353
7354 outrel.r_offset = (htab->got->output_section->vma
7355 + htab->got->output_offset
7356 + off);
7357 outrel.r_addend = 0;
7358 if (tls_ty & (TLS_LD | TLS_GD))
7359 {
7360 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7361 if (tls_ty == (TLS_TLS | TLS_GD))
7362 {
7363 loc = rsec->contents;
7364 loc += (rsec->reloc_count++
7365 * sizeof (Elf32_External_Rela));
7366 bfd_elf32_swap_reloca_out (output_bfd,
7367 &outrel, loc);
7368 outrel.r_offset += 4;
7369 outrel.r_info
7370 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7371 }
7372 }
7373 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7374 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7375 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7376 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7377 else if (indx != 0)
7378 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7379 else if (ifunc != NULL)
7380 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7381 else
7382 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7383 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7384 {
7385 outrel.r_addend += relocation;
7386 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7387 outrel.r_addend -= htab->elf.tls_sec->vma;
7388 }
7389 loc = rsec->contents;
7390 loc += (rsec->reloc_count++
7391 * sizeof (Elf32_External_Rela));
7392 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7393 }
7394
7395 /* Init the .got section contents if we're not
7396 emitting a reloc. */
7397 else
7398 {
7399 bfd_vma value = relocation;
7400
7401 if (tls_ty == (TLS_TLS | TLS_LD))
7402 value = 1;
7403 else if (tls_ty != 0)
7404 {
7405 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7406 if (tls_ty == (TLS_TLS | TLS_TPREL))
7407 value += DTP_OFFSET - TP_OFFSET;
7408
7409 if (tls_ty == (TLS_TLS | TLS_GD))
7410 {
7411 bfd_put_32 (output_bfd, value,
7412 htab->got->contents + off + 4);
7413 value = 1;
7414 }
7415 }
7416 bfd_put_32 (output_bfd, value,
7417 htab->got->contents + off);
7418 }
7419
7420 off += 4;
7421 if (tls_ty & (TLS_LD | TLS_GD))
7422 off += 4;
7423 }
7424 while (tls_m != 0);
7425
7426 off = *offp;
7427 *offp = off | 1;
7428 }
7429
7430 if (off >= (bfd_vma) -2)
7431 abort ();
7432
7433 if ((tls_type & TLS_TLS) != 0)
7434 {
7435 if (tls_type != (TLS_TLS | TLS_LD))
7436 {
7437 if ((tls_mask & TLS_LD) != 0
7438 && !(h == NULL
7439 || !h->def_dynamic))
7440 off += 8;
7441 if (tls_type != (TLS_TLS | TLS_GD))
7442 {
7443 if ((tls_mask & TLS_GD) != 0)
7444 off += 8;
7445 if (tls_type != (TLS_TLS | TLS_DTPREL))
7446 {
7447 if ((tls_mask & TLS_DTPREL) != 0)
7448 off += 4;
7449 }
7450 }
7451 }
7452 }
7453
7454 relocation = (htab->got->output_section->vma
7455 + htab->got->output_offset
7456 + off
7457 - SYM_VAL (htab->elf.hgot));
7458
7459 /* Addends on got relocations don't make much sense.
7460 x+off@got is actually x@got+off, and since the got is
7461 generated by a hash table traversal, the value in the
7462 got at entry m+n bears little relation to the entry m. */
7463 if (addend != 0)
7464 info->callbacks->einfo
7465 (_("%H: non-zero addend on %s reloc against `%s'\n"),
7466 input_bfd, input_section, rel->r_offset,
7467 howto->name,
7468 sym_name);
7469 }
7470 break;
7471
7472 /* Relocations that need no special processing. */
7473 case R_PPC_LOCAL24PC:
7474 /* It makes no sense to point a local relocation
7475 at a symbol not in this object. */
7476 if (unresolved_reloc)
7477 {
7478 if (! (*info->callbacks->undefined_symbol) (info,
7479 h->root.root.string,
7480 input_bfd,
7481 input_section,
7482 rel->r_offset,
7483 TRUE))
7484 return FALSE;
7485 continue;
7486 }
7487 break;
7488
7489 case R_PPC_DTPREL16:
7490 case R_PPC_DTPREL16_LO:
7491 case R_PPC_DTPREL16_HI:
7492 case R_PPC_DTPREL16_HA:
7493 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7494 break;
7495
7496 /* Relocations that may need to be propagated if this is a shared
7497 object. */
7498 case R_PPC_TPREL16:
7499 case R_PPC_TPREL16_LO:
7500 case R_PPC_TPREL16_HI:
7501 case R_PPC_TPREL16_HA:
7502 if (h != NULL
7503 && h->root.type == bfd_link_hash_undefweak
7504 && h->dynindx == -1)
7505 {
7506 /* Make this relocation against an undefined weak symbol
7507 resolve to zero. This is really just a tweak, since
7508 code using weak externs ought to check that they are
7509 defined before using them. */
7510 bfd_byte *p = contents + rel->r_offset - d_offset;
7511 unsigned int insn = bfd_get_32 (output_bfd, p);
7512 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
7513 if (insn != 0)
7514 bfd_put_32 (output_bfd, insn, p);
7515 break;
7516 }
7517 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7518 /* The TPREL16 relocs shouldn't really be used in shared
7519 libs as they will result in DT_TEXTREL being set, but
7520 support them anyway. */
7521 goto dodyn;
7522
7523 case R_PPC_TPREL32:
7524 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
7525 goto dodyn;
7526
7527 case R_PPC_DTPREL32:
7528 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
7529 goto dodyn;
7530
7531 case R_PPC_DTPMOD32:
7532 relocation = 1;
7533 addend = 0;
7534 goto dodyn;
7535
7536 case R_PPC_REL16:
7537 case R_PPC_REL16_LO:
7538 case R_PPC_REL16_HI:
7539 case R_PPC_REL16_HA:
7540 break;
7541
7542 case R_PPC_REL32:
7543 if (h == NULL || h == htab->elf.hgot)
7544 break;
7545 /* fall through */
7546
7547 case R_PPC_ADDR32:
7548 case R_PPC_ADDR16:
7549 case R_PPC_ADDR16_LO:
7550 case R_PPC_ADDR16_HI:
7551 case R_PPC_ADDR16_HA:
7552 case R_PPC_UADDR32:
7553 case R_PPC_UADDR16:
7554 goto dodyn;
7555
7556 case R_PPC_REL24:
7557 case R_PPC_REL14:
7558 case R_PPC_REL14_BRTAKEN:
7559 case R_PPC_REL14_BRNTAKEN:
7560 /* If these relocations are not to a named symbol, they can be
7561 handled right here, no need to bother the dynamic linker. */
7562 if (SYMBOL_CALLS_LOCAL (info, h)
7563 || h == htab->elf.hgot)
7564 break;
7565 /* fall through */
7566
7567 case R_PPC_ADDR24:
7568 case R_PPC_ADDR14:
7569 case R_PPC_ADDR14_BRTAKEN:
7570 case R_PPC_ADDR14_BRNTAKEN:
7571 if (h != NULL && !info->shared)
7572 break;
7573 /* fall through */
7574
7575 dodyn:
7576 if ((input_section->flags & SEC_ALLOC) == 0
7577 || is_vxworks_tls)
7578 break;
7579
7580 if ((info->shared
7581 && !(h != NULL
7582 && ((h->root.type == bfd_link_hash_undefined
7583 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
7584 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
7585 || (h->root.type == bfd_link_hash_undefweak
7586 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
7587 && (must_be_dyn_reloc (info, r_type)
7588 || !SYMBOL_CALLS_LOCAL (info, h)))
7589 || (ELIMINATE_COPY_RELOCS
7590 && !info->shared
7591 && h != NULL
7592 && h->dynindx != -1
7593 && !h->non_got_ref
7594 && !h->def_regular))
7595 {
7596 int skip;
7597 bfd_byte * loc;
7598 #ifdef DEBUG
7599 fprintf (stderr, "ppc_elf_relocate_section needs to "
7600 "create relocation for %s\n",
7601 (h && h->root.root.string
7602 ? h->root.root.string : "<unknown>"));
7603 #endif
7604
7605 /* When generating a shared object, these relocations
7606 are copied into the output file to be resolved at run
7607 time. */
7608 if (sreloc == NULL)
7609 {
7610 sreloc = elf_section_data (input_section)->sreloc;
7611 if (!htab->elf.dynamic_sections_created)
7612 sreloc = htab->reliplt;
7613 if (sreloc == NULL)
7614 return FALSE;
7615 }
7616
7617 skip = 0;
7618 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
7619 input_section,
7620 rel->r_offset);
7621 if (outrel.r_offset == (bfd_vma) -1
7622 || outrel.r_offset == (bfd_vma) -2)
7623 skip = (int) outrel.r_offset;
7624 outrel.r_offset += (input_section->output_section->vma
7625 + input_section->output_offset);
7626
7627 if (skip)
7628 memset (&outrel, 0, sizeof outrel);
7629 else if ((h != NULL
7630 && (h->root.type == bfd_link_hash_undefined
7631 || h->root.type == bfd_link_hash_undefweak))
7632 || !SYMBOL_REFERENCES_LOCAL (info, h))
7633 {
7634 unresolved_reloc = FALSE;
7635 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
7636 outrel.r_addend = rel->r_addend;
7637 }
7638 else
7639 {
7640 outrel.r_addend = relocation + rel->r_addend;
7641
7642 if (r_type != R_PPC_ADDR32)
7643 {
7644 long indx = 0;
7645
7646 if (ifunc != NULL)
7647 {
7648 /* If we get here when building a static
7649 executable, then the libc startup function
7650 responsible for applying indirect function
7651 relocations is going to complain about
7652 the reloc type.
7653 If we get here when building a dynamic
7654 executable, it will be because we have
7655 a text relocation. The dynamic loader
7656 will set the text segment writable and
7657 non-executable to apply text relocations.
7658 So we'll segfault when trying to run the
7659 indirection function to resolve the reloc. */
7660 info->callbacks->einfo
7661 (_("%H: relocation %s for indirect "
7662 "function %s unsupported\n"),
7663 input_bfd, input_section, rel->r_offset,
7664 howto->name,
7665 sym_name);
7666 ret = FALSE;
7667 }
7668 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
7669 ;
7670 else if (sec == NULL || sec->owner == NULL)
7671 {
7672 bfd_set_error (bfd_error_bad_value);
7673 ret = FALSE;
7674 }
7675 else
7676 {
7677 asection *osec;
7678
7679 /* We are turning this relocation into one
7680 against a section symbol. It would be
7681 proper to subtract the symbol's value,
7682 osec->vma, from the emitted reloc addend,
7683 but ld.so expects buggy relocs.
7684 FIXME: Why not always use a zero index? */
7685 osec = sec->output_section;
7686 indx = elf_section_data (osec)->dynindx;
7687 if (indx == 0)
7688 {
7689 osec = htab->elf.text_index_section;
7690 indx = elf_section_data (osec)->dynindx;
7691 }
7692 BFD_ASSERT (indx != 0);
7693 #ifdef DEBUG
7694 if (indx == 0)
7695 printf ("indx=%ld section=%s flags=%08x name=%s\n",
7696 indx, osec->name, osec->flags,
7697 h->root.root.string);
7698 #endif
7699 }
7700
7701 outrel.r_info = ELF32_R_INFO (indx, r_type);
7702 }
7703 else if (ifunc != NULL)
7704 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7705 else
7706 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7707 }
7708
7709 loc = sreloc->contents;
7710 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
7711 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7712
7713 if (skip == -1)
7714 continue;
7715
7716 /* This reloc will be computed at runtime. We clear the memory
7717 so that it contains predictable value. */
7718 if (! skip
7719 && ((input_section->flags & SEC_ALLOC) != 0
7720 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
7721 {
7722 relocation = howto->pc_relative ? outrel.r_offset : 0;
7723 addend = 0;
7724 break;
7725 }
7726 }
7727 break;
7728
7729 case R_PPC_RELAX_PLT:
7730 case R_PPC_RELAX_PLTREL24:
7731 if (h != NULL)
7732 {
7733 struct plt_entry *ent;
7734 bfd_vma got2_addend = 0;
7735
7736 if (r_type == R_PPC_RELAX_PLTREL24)
7737 {
7738 if (info->shared)
7739 got2_addend = addend;
7740 addend = 0;
7741 }
7742 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
7743 if (htab->plt_type == PLT_NEW)
7744 relocation = (htab->glink->output_section->vma
7745 + htab->glink->output_offset
7746 + ent->glink_offset);
7747 else
7748 relocation = (htab->plt->output_section->vma
7749 + htab->plt->output_offset
7750 + ent->plt.offset);
7751 }
7752 /* Fall thru */
7753
7754 case R_PPC_RELAX:
7755 if (info->shared)
7756 relocation -= (input_section->output_section->vma
7757 + input_section->output_offset
7758 + rel->r_offset - 4);
7759
7760 {
7761 unsigned long t0;
7762 unsigned long t1;
7763
7764 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
7765 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
7766
7767 /* We're clearing the bits for R_PPC_ADDR16_HA
7768 and R_PPC_ADDR16_LO here. */
7769 t0 &= ~0xffff;
7770 t1 &= ~0xffff;
7771
7772 /* t0 is HA, t1 is LO */
7773 relocation += addend;
7774 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
7775 t1 |= relocation & 0xffff;
7776
7777 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
7778 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
7779
7780 /* Rewrite the reloc and convert one of the trailing nop
7781 relocs to describe this relocation. */
7782 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
7783 /* The relocs are at the bottom 2 bytes */
7784 rel[0].r_offset += 2;
7785 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
7786 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7787 rel[1].r_offset += 4;
7788 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7789 rel++;
7790 }
7791 continue;
7792
7793 /* Indirect .sdata relocation. */
7794 case R_PPC_EMB_SDAI16:
7795 BFD_ASSERT (htab->sdata[0].section != NULL);
7796 if (!is_static_defined (htab->sdata[0].sym))
7797 {
7798 unresolved_reloc = TRUE;
7799 break;
7800 }
7801 relocation
7802 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
7803 h, relocation, rel);
7804 addend = 0;
7805 break;
7806
7807 /* Indirect .sdata2 relocation. */
7808 case R_PPC_EMB_SDA2I16:
7809 BFD_ASSERT (htab->sdata[1].section != NULL);
7810 if (!is_static_defined (htab->sdata[1].sym))
7811 {
7812 unresolved_reloc = TRUE;
7813 break;
7814 }
7815 relocation
7816 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7817 h, relocation, rel);
7818 addend = 0;
7819 break;
7820
7821 /* Handle the TOC16 reloc. We want to use the offset within the .got
7822 section, not the actual VMA. This is appropriate when generating
7823 an embedded ELF object, for which the .got section acts like the
7824 AIX .toc section. */
7825 case R_PPC_TOC16: /* phony GOT16 relocations */
7826 if (sec == NULL || sec->output_section == NULL)
7827 {
7828 unresolved_reloc = TRUE;
7829 break;
7830 }
7831 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7832 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7833
7834 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7835 break;
7836
7837 case R_PPC_PLTREL24:
7838 if (h == NULL || ifunc != NULL)
7839 break;
7840 /* Relocation is to the entry for this symbol in the
7841 procedure linkage table. */
7842 {
7843 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
7844 info->shared ? addend : 0);
7845 addend = 0;
7846 if (ent == NULL
7847 || htab->plt == NULL)
7848 {
7849 /* We didn't make a PLT entry for this symbol. This
7850 happens when statically linking PIC code, or when
7851 using -Bsymbolic. */
7852 break;
7853 }
7854
7855 unresolved_reloc = FALSE;
7856 if (htab->plt_type == PLT_NEW)
7857 relocation = (htab->glink->output_section->vma
7858 + htab->glink->output_offset
7859 + ent->glink_offset);
7860 else
7861 relocation = (htab->plt->output_section->vma
7862 + htab->plt->output_offset
7863 + ent->plt.offset);
7864 }
7865 break;
7866
7867 /* Relocate against _SDA_BASE_. */
7868 case R_PPC_SDAREL16:
7869 {
7870 const char *name;
7871 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
7872
7873 if (sec == NULL
7874 || sec->output_section == NULL
7875 || !is_static_defined (sda))
7876 {
7877 unresolved_reloc = TRUE;
7878 break;
7879 }
7880 addend -= SYM_VAL (sda);
7881
7882 name = bfd_get_section_name (abfd, sec->output_section);
7883 if (! ((CONST_STRNEQ (name, ".sdata")
7884 && (name[6] == 0 || name[6] == '.'))
7885 || (CONST_STRNEQ (name, ".sbss")
7886 && (name[5] == 0 || name[5] == '.'))))
7887 {
7888 info->callbacks->einfo
7889 (_("%B: the target (%s) of a %s relocation is "
7890 "in the wrong output section (%s)\n"),
7891 input_bfd,
7892 sym_name,
7893 howto->name,
7894 name);
7895 }
7896 }
7897 break;
7898
7899 /* Relocate against _SDA2_BASE_. */
7900 case R_PPC_EMB_SDA2REL:
7901 {
7902 const char *name;
7903 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
7904
7905 if (sec == NULL
7906 || sec->output_section == NULL
7907 || !is_static_defined (sda))
7908 {
7909 unresolved_reloc = TRUE;
7910 break;
7911 }
7912 addend -= SYM_VAL (sda);
7913
7914 name = bfd_get_section_name (abfd, sec->output_section);
7915 if (! (CONST_STRNEQ (name, ".sdata2")
7916 || CONST_STRNEQ (name, ".sbss2")))
7917 {
7918 info->callbacks->einfo
7919 (_("%B: the target (%s) of a %s relocation is "
7920 "in the wrong output section (%s)\n"),
7921 input_bfd,
7922 sym_name,
7923 howto->name,
7924 name);
7925 }
7926 }
7927 break;
7928
7929 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7930 case R_PPC_EMB_SDA21:
7931 case R_PPC_EMB_RELSDA:
7932 {
7933 const char *name;
7934 int reg;
7935 struct elf_link_hash_entry *sda = NULL;
7936
7937 if (sec == NULL || sec->output_section == NULL)
7938 {
7939 unresolved_reloc = TRUE;
7940 break;
7941 }
7942
7943 name = bfd_get_section_name (abfd, sec->output_section);
7944 if (((CONST_STRNEQ (name, ".sdata")
7945 && (name[6] == 0 || name[6] == '.'))
7946 || (CONST_STRNEQ (name, ".sbss")
7947 && (name[5] == 0 || name[5] == '.'))))
7948 {
7949 reg = 13;
7950 sda = htab->sdata[0].sym;
7951 }
7952 else if (CONST_STRNEQ (name, ".sdata2")
7953 || CONST_STRNEQ (name, ".sbss2"))
7954 {
7955 reg = 2;
7956 sda = htab->sdata[1].sym;
7957 }
7958 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7959 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7960 {
7961 reg = 0;
7962 }
7963 else
7964 {
7965 info->callbacks->einfo
7966 (_("%B: the target (%s) of a %s relocation is "
7967 "in the wrong output section (%s)\n"),
7968 input_bfd,
7969 sym_name,
7970 howto->name,
7971 name);
7972
7973 bfd_set_error (bfd_error_bad_value);
7974 ret = FALSE;
7975 continue;
7976 }
7977
7978 if (sda != NULL)
7979 {
7980 if (!is_static_defined (sda))
7981 {
7982 unresolved_reloc = TRUE;
7983 break;
7984 }
7985 addend -= SYM_VAL (sda);
7986 }
7987
7988 if (r_type == R_PPC_EMB_SDA21)
7989 {
7990 bfd_vma insn; /* Fill in register field. */
7991
7992 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7993 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7994 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7995 }
7996 }
7997 break;
7998
7999 /* Relocate against the beginning of the section. */
8000 case R_PPC_SECTOFF:
8001 case R_PPC_SECTOFF_LO:
8002 case R_PPC_SECTOFF_HI:
8003 case R_PPC_SECTOFF_HA:
8004 if (sec == NULL || sec->output_section == NULL)
8005 {
8006 unresolved_reloc = TRUE;
8007 break;
8008 }
8009 addend -= sec->output_section->vma;
8010 break;
8011
8012 /* Negative relocations. */
8013 case R_PPC_EMB_NADDR32:
8014 case R_PPC_EMB_NADDR16:
8015 case R_PPC_EMB_NADDR16_LO:
8016 case R_PPC_EMB_NADDR16_HI:
8017 case R_PPC_EMB_NADDR16_HA:
8018 addend -= 2 * relocation;
8019 break;
8020
8021 case R_PPC_COPY:
8022 case R_PPC_GLOB_DAT:
8023 case R_PPC_JMP_SLOT:
8024 case R_PPC_RELATIVE:
8025 case R_PPC_IRELATIVE:
8026 case R_PPC_PLT32:
8027 case R_PPC_PLTREL32:
8028 case R_PPC_PLT16_LO:
8029 case R_PPC_PLT16_HI:
8030 case R_PPC_PLT16_HA:
8031 case R_PPC_ADDR30:
8032 case R_PPC_EMB_RELSEC16:
8033 case R_PPC_EMB_RELST_LO:
8034 case R_PPC_EMB_RELST_HI:
8035 case R_PPC_EMB_RELST_HA:
8036 case R_PPC_EMB_BIT_FLD:
8037 info->callbacks->einfo
8038 (_("%B: relocation %s is not yet supported for symbol %s\n"),
8039 input_bfd,
8040 howto->name,
8041 sym_name);
8042
8043 bfd_set_error (bfd_error_invalid_operation);
8044 ret = FALSE;
8045 continue;
8046 }
8047
8048 /* Do any further special processing. */
8049 switch (r_type)
8050 {
8051 default:
8052 break;
8053
8054 case R_PPC_ADDR16_HA:
8055 case R_PPC_REL16_HA:
8056 case R_PPC_SECTOFF_HA:
8057 case R_PPC_TPREL16_HA:
8058 case R_PPC_DTPREL16_HA:
8059 case R_PPC_EMB_NADDR16_HA:
8060 case R_PPC_EMB_RELST_HA:
8061 /* It's just possible that this symbol is a weak symbol
8062 that's not actually defined anywhere. In that case,
8063 'sec' would be NULL, and we should leave the symbol
8064 alone (it will be set to zero elsewhere in the link). */
8065 if (sec == NULL)
8066 break;
8067 /* Fall thru */
8068
8069 case R_PPC_PLT16_HA:
8070 case R_PPC_GOT16_HA:
8071 case R_PPC_GOT_TLSGD16_HA:
8072 case R_PPC_GOT_TLSLD16_HA:
8073 case R_PPC_GOT_TPREL16_HA:
8074 case R_PPC_GOT_DTPREL16_HA:
8075 /* Add 0x10000 if sign bit in 0:15 is set.
8076 Bits 0:15 are not used. */
8077 addend += 0x8000;
8078 break;
8079 }
8080
8081 #ifdef DEBUG
8082 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8083 "offset = %ld, addend = %ld\n",
8084 howto->name,
8085 (int) r_type,
8086 sym_name,
8087 r_symndx,
8088 (long) rel->r_offset,
8089 (long) addend);
8090 #endif
8091
8092 if (unresolved_reloc
8093 && !((input_section->flags & SEC_DEBUGGING) != 0
8094 && h->def_dynamic))
8095 {
8096 info->callbacks->einfo
8097 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
8098 input_bfd, input_section, rel->r_offset,
8099 howto->name,
8100 sym_name);
8101 ret = FALSE;
8102 }
8103
8104 r = _bfd_final_link_relocate (howto,
8105 input_bfd,
8106 input_section,
8107 contents,
8108 rel->r_offset,
8109 relocation,
8110 addend);
8111
8112 if (r != bfd_reloc_ok)
8113 {
8114 if (r == bfd_reloc_overflow)
8115 {
8116 if (warned)
8117 continue;
8118 if (h != NULL
8119 && h->root.type == bfd_link_hash_undefweak
8120 && howto->pc_relative)
8121 {
8122 /* Assume this is a call protected by other code that
8123 detect the symbol is undefined. If this is the case,
8124 we can safely ignore the overflow. If not, the
8125 program is hosed anyway, and a little warning isn't
8126 going to help. */
8127
8128 continue;
8129 }
8130
8131 if (! (*info->callbacks->reloc_overflow) (info,
8132 (h ? &h->root : NULL),
8133 sym_name,
8134 howto->name,
8135 rel->r_addend,
8136 input_bfd,
8137 input_section,
8138 rel->r_offset))
8139 return FALSE;
8140 }
8141 else
8142 {
8143 info->callbacks->einfo
8144 (_("%H: %s reloc against `%s': error %d\n"),
8145 input_bfd, input_section, rel->r_offset,
8146 howto->name, sym_name, (int) r);
8147 ret = FALSE;
8148 }
8149 }
8150 }
8151
8152 #ifdef DEBUG
8153 fprintf (stderr, "\n");
8154 #endif
8155
8156 return ret;
8157 }
8158 \f
8159 /* Finish up dynamic symbol handling. We set the contents of various
8160 dynamic sections here. */
8161
8162 static bfd_boolean
8163 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
8164 struct bfd_link_info *info,
8165 struct elf_link_hash_entry *h,
8166 Elf_Internal_Sym *sym)
8167 {
8168 struct ppc_elf_link_hash_table *htab;
8169 struct plt_entry *ent;
8170 bfd_boolean doneone;
8171
8172 #ifdef DEBUG
8173 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
8174 h->root.root.string);
8175 #endif
8176
8177 htab = ppc_elf_hash_table (info);
8178 BFD_ASSERT (htab->elf.dynobj != NULL);
8179
8180 doneone = FALSE;
8181 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8182 if (ent->plt.offset != (bfd_vma) -1)
8183 {
8184 if (!doneone)
8185 {
8186 Elf_Internal_Rela rela;
8187 bfd_byte *loc;
8188 bfd_vma reloc_index;
8189
8190 if (htab->plt_type == PLT_NEW
8191 || !htab->elf.dynamic_sections_created
8192 || h->dynindx == -1)
8193 reloc_index = ent->plt.offset / 4;
8194 else
8195 {
8196 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
8197 / htab->plt_slot_size);
8198 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8199 && htab->plt_type == PLT_OLD)
8200 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8201 }
8202
8203 /* This symbol has an entry in the procedure linkage table.
8204 Set it up. */
8205 if (htab->plt_type == PLT_VXWORKS
8206 && htab->elf.dynamic_sections_created
8207 && h->dynindx != -1)
8208 {
8209 bfd_vma got_offset;
8210 const bfd_vma *plt_entry;
8211
8212 /* The first three entries in .got.plt are reserved. */
8213 got_offset = (reloc_index + 3) * 4;
8214
8215 /* Use the right PLT. */
8216 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8217 : ppc_elf_vxworks_plt_entry;
8218
8219 /* Fill in the .plt on VxWorks. */
8220 if (info->shared)
8221 {
8222 bfd_put_32 (output_bfd,
8223 plt_entry[0] | PPC_HA (got_offset),
8224 htab->plt->contents + ent->plt.offset + 0);
8225 bfd_put_32 (output_bfd,
8226 plt_entry[1] | PPC_LO (got_offset),
8227 htab->plt->contents + ent->plt.offset + 4);
8228 }
8229 else
8230 {
8231 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8232
8233 bfd_put_32 (output_bfd,
8234 plt_entry[0] | PPC_HA (got_loc),
8235 htab->plt->contents + ent->plt.offset + 0);
8236 bfd_put_32 (output_bfd,
8237 plt_entry[1] | PPC_LO (got_loc),
8238 htab->plt->contents + ent->plt.offset + 4);
8239 }
8240
8241 bfd_put_32 (output_bfd, plt_entry[2],
8242 htab->plt->contents + ent->plt.offset + 8);
8243 bfd_put_32 (output_bfd, plt_entry[3],
8244 htab->plt->contents + ent->plt.offset + 12);
8245
8246 /* This instruction is an immediate load. The value loaded is
8247 the byte offset of the R_PPC_JMP_SLOT relocation from the
8248 start of the .rela.plt section. The value is stored in the
8249 low-order 16 bits of the load instruction. */
8250 /* NOTE: It appears that this is now an index rather than a
8251 prescaled offset. */
8252 bfd_put_32 (output_bfd,
8253 plt_entry[4] | reloc_index,
8254 htab->plt->contents + ent->plt.offset + 16);
8255 /* This instruction is a PC-relative branch whose target is
8256 the start of the PLT section. The address of this branch
8257 instruction is 20 bytes beyond the start of this PLT entry.
8258 The address is encoded in bits 6-29, inclusive. The value
8259 stored is right-shifted by two bits, permitting a 26-bit
8260 offset. */
8261 bfd_put_32 (output_bfd,
8262 (plt_entry[5]
8263 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8264 htab->plt->contents + ent->plt.offset + 20);
8265 bfd_put_32 (output_bfd, plt_entry[6],
8266 htab->plt->contents + ent->plt.offset + 24);
8267 bfd_put_32 (output_bfd, plt_entry[7],
8268 htab->plt->contents + ent->plt.offset + 28);
8269
8270 /* Fill in the GOT entry corresponding to this PLT slot with
8271 the address immediately after the the "bctr" instruction
8272 in this PLT entry. */
8273 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8274 + htab->plt->output_offset
8275 + ent->plt.offset + 16),
8276 htab->sgotplt->contents + got_offset);
8277
8278 if (!info->shared)
8279 {
8280 /* Fill in a couple of entries in .rela.plt.unloaded. */
8281 loc = htab->srelplt2->contents
8282 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8283 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8284 * sizeof (Elf32_External_Rela));
8285
8286 /* Provide the @ha relocation for the first instruction. */
8287 rela.r_offset = (htab->plt->output_section->vma
8288 + htab->plt->output_offset
8289 + ent->plt.offset + 2);
8290 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8291 R_PPC_ADDR16_HA);
8292 rela.r_addend = got_offset;
8293 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8294 loc += sizeof (Elf32_External_Rela);
8295
8296 /* Provide the @l relocation for the second instruction. */
8297 rela.r_offset = (htab->plt->output_section->vma
8298 + htab->plt->output_offset
8299 + ent->plt.offset + 6);
8300 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
8301 R_PPC_ADDR16_LO);
8302 rela.r_addend = got_offset;
8303 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8304 loc += sizeof (Elf32_External_Rela);
8305
8306 /* Provide a relocation for the GOT entry corresponding to this
8307 PLT slot. Point it at the middle of the .plt entry. */
8308 rela.r_offset = (htab->sgotplt->output_section->vma
8309 + htab->sgotplt->output_offset
8310 + got_offset);
8311 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
8312 R_PPC_ADDR32);
8313 rela.r_addend = ent->plt.offset + 16;
8314 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8315 }
8316
8317 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
8318 In particular, the offset for the relocation is not the
8319 address of the PLT entry for this function, as specified
8320 by the ABI. Instead, the offset is set to the address of
8321 the GOT slot for this function. See EABI 4.4.4.1. */
8322 rela.r_offset = (htab->sgotplt->output_section->vma
8323 + htab->sgotplt->output_offset
8324 + got_offset);
8325
8326 }
8327 else
8328 {
8329 asection *splt = htab->plt;
8330 if (!htab->elf.dynamic_sections_created
8331 || h->dynindx == -1)
8332 splt = htab->iplt;
8333
8334 rela.r_offset = (splt->output_section->vma
8335 + splt->output_offset
8336 + ent->plt.offset);
8337 if (htab->plt_type == PLT_OLD
8338 || !htab->elf.dynamic_sections_created
8339 || h->dynindx == -1)
8340 {
8341 /* We don't need to fill in the .plt. The ppc dynamic
8342 linker will fill it in. */
8343 }
8344 else
8345 {
8346 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
8347 + htab->glink->output_section->vma
8348 + htab->glink->output_offset);
8349 bfd_put_32 (output_bfd, val,
8350 splt->contents + ent->plt.offset);
8351 }
8352 }
8353
8354 /* Fill in the entry in the .rela.plt section. */
8355 rela.r_addend = 0;
8356 if (!htab->elf.dynamic_sections_created
8357 || h->dynindx == -1)
8358 {
8359 BFD_ASSERT (h->type == STT_GNU_IFUNC
8360 && h->def_regular
8361 && (h->root.type == bfd_link_hash_defined
8362 || h->root.type == bfd_link_hash_defweak));
8363 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8364 rela.r_addend = SYM_VAL (h);
8365 }
8366 else
8367 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
8368
8369 if (!htab->elf.dynamic_sections_created
8370 || h->dynindx == -1)
8371 loc = (htab->reliplt->contents
8372 + (htab->reliplt->reloc_count++
8373 * sizeof (Elf32_External_Rela)));
8374 else
8375 loc = (htab->relplt->contents
8376 + reloc_index * sizeof (Elf32_External_Rela));
8377 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8378
8379 if (!h->def_regular)
8380 {
8381 /* Mark the symbol as undefined, rather than as
8382 defined in the .plt section. Leave the value if
8383 there were any relocations where pointer equality
8384 matters (this is a clue for the dynamic linker, to
8385 make function pointer comparisons work between an
8386 application and shared library), otherwise set it
8387 to zero. */
8388 sym->st_shndx = SHN_UNDEF;
8389 if (!h->pointer_equality_needed)
8390 sym->st_value = 0;
8391 else if (!h->ref_regular_nonweak)
8392 {
8393 /* This breaks function pointer comparisons, but
8394 that is better than breaking tests for a NULL
8395 function pointer. */
8396 sym->st_value = 0;
8397 }
8398 }
8399 else if (h->type == STT_GNU_IFUNC
8400 && !info->shared)
8401 {
8402 /* Set the value of ifunc symbols in a non-pie
8403 executable to the glink entry. This is to avoid
8404 text relocations. We can't do this for ifunc in
8405 allocate_dynrelocs, as we do for normal dynamic
8406 function symbols with plt entries, because we need
8407 to keep the original value around for the ifunc
8408 relocation. */
8409 sym->st_shndx = (_bfd_elf_section_from_bfd_section
8410 (output_bfd, htab->glink->output_section));
8411 sym->st_value = (ent->glink_offset
8412 + htab->glink->output_offset
8413 + htab->glink->output_section->vma);
8414 }
8415 doneone = TRUE;
8416 }
8417
8418 if (htab->plt_type == PLT_NEW
8419 || !htab->elf.dynamic_sections_created
8420 || h->dynindx == -1)
8421 {
8422 unsigned char *p;
8423 asection *splt = htab->plt;
8424 if (!htab->elf.dynamic_sections_created
8425 || h->dynindx == -1)
8426 splt = htab->iplt;
8427
8428 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
8429
8430 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
8431 {
8432 bfd_put_32 (output_bfd, LWZ_11_3, p);
8433 p += 4;
8434 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
8435 p += 4;
8436 bfd_put_32 (output_bfd, MR_0_3, p);
8437 p += 4;
8438 bfd_put_32 (output_bfd, CMPWI_11_0, p);
8439 p += 4;
8440 bfd_put_32 (output_bfd, ADD_3_12_2, p);
8441 p += 4;
8442 bfd_put_32 (output_bfd, BEQLR, p);
8443 p += 4;
8444 bfd_put_32 (output_bfd, MR_3_0, p);
8445 p += 4;
8446 bfd_put_32 (output_bfd, NOP, p);
8447 p += 4;
8448 }
8449
8450 write_glink_stub (ent, splt, p, info);
8451
8452 if (!info->shared)
8453 /* We only need one non-PIC glink stub. */
8454 break;
8455 }
8456 else
8457 break;
8458 }
8459
8460 if (h->needs_copy)
8461 {
8462 asection *s;
8463 Elf_Internal_Rela rela;
8464 bfd_byte *loc;
8465
8466 /* This symbols needs a copy reloc. Set it up. */
8467
8468 #ifdef DEBUG
8469 fprintf (stderr, ", copy");
8470 #endif
8471
8472 BFD_ASSERT (h->dynindx != -1);
8473
8474 if (ppc_elf_hash_entry (h)->has_sda_refs)
8475 s = htab->relsbss;
8476 else
8477 s = htab->relbss;
8478 BFD_ASSERT (s != NULL);
8479
8480 rela.r_offset = SYM_VAL (h);
8481 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
8482 rela.r_addend = 0;
8483 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
8484 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8485 }
8486
8487 #ifdef DEBUG
8488 fprintf (stderr, "\n");
8489 #endif
8490
8491 /* Mark some specially defined symbols as absolute. */
8492 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
8493 || (!htab->is_vxworks
8494 && (h == htab->elf.hgot
8495 || strcmp (h->root.root.string,
8496 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
8497 sym->st_shndx = SHN_ABS;
8498
8499 return TRUE;
8500 }
8501 \f
8502 static enum elf_reloc_type_class
8503 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
8504 {
8505 switch (ELF32_R_TYPE (rela->r_info))
8506 {
8507 case R_PPC_RELATIVE:
8508 return reloc_class_relative;
8509 case R_PPC_REL24:
8510 case R_PPC_ADDR24:
8511 case R_PPC_JMP_SLOT:
8512 return reloc_class_plt;
8513 case R_PPC_COPY:
8514 return reloc_class_copy;
8515 default:
8516 return reloc_class_normal;
8517 }
8518 }
8519 \f
8520 /* Finish up the dynamic sections. */
8521
8522 static bfd_boolean
8523 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
8524 struct bfd_link_info *info)
8525 {
8526 asection *sdyn;
8527 asection *splt;
8528 struct ppc_elf_link_hash_table *htab;
8529 bfd_vma got;
8530 bfd *dynobj;
8531 bfd_boolean ret = TRUE;
8532
8533 #ifdef DEBUG
8534 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
8535 #endif
8536
8537 htab = ppc_elf_hash_table (info);
8538 dynobj = elf_hash_table (info)->dynobj;
8539 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
8540 if (htab->is_vxworks)
8541 splt = bfd_get_section_by_name (dynobj, ".plt");
8542 else
8543 splt = NULL;
8544
8545 got = 0;
8546 if (htab->elf.hgot != NULL)
8547 got = SYM_VAL (htab->elf.hgot);
8548
8549 if (htab->elf.dynamic_sections_created)
8550 {
8551 Elf32_External_Dyn *dyncon, *dynconend;
8552
8553 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
8554
8555 dyncon = (Elf32_External_Dyn *) sdyn->contents;
8556 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
8557 for (; dyncon < dynconend; dyncon++)
8558 {
8559 Elf_Internal_Dyn dyn;
8560 asection *s;
8561
8562 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
8563
8564 switch (dyn.d_tag)
8565 {
8566 case DT_PLTGOT:
8567 if (htab->is_vxworks)
8568 s = htab->sgotplt;
8569 else
8570 s = htab->plt;
8571 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8572 break;
8573
8574 case DT_PLTRELSZ:
8575 dyn.d_un.d_val = htab->relplt->size;
8576 break;
8577
8578 case DT_JMPREL:
8579 s = htab->relplt;
8580 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8581 break;
8582
8583 case DT_PPC_GOT:
8584 dyn.d_un.d_ptr = got;
8585 break;
8586
8587 case DT_RELASZ:
8588 if (htab->is_vxworks)
8589 {
8590 if (htab->relplt)
8591 dyn.d_un.d_ptr -= htab->relplt->size;
8592 break;
8593 }
8594 continue;
8595
8596 default:
8597 if (htab->is_vxworks
8598 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
8599 break;
8600 continue;
8601 }
8602
8603 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
8604 }
8605 }
8606
8607 if (htab->got != NULL)
8608 {
8609 if (htab->elf.hgot->root.u.def.section == htab->got
8610 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
8611 {
8612 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
8613
8614 p += htab->elf.hgot->root.u.def.value;
8615 if (htab->plt_type == PLT_OLD)
8616 {
8617 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
8618 so that a function can easily find the address of
8619 _GLOBAL_OFFSET_TABLE_. */
8620 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
8621 < htab->elf.hgot->root.u.def.section->size);
8622 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
8623 }
8624
8625 if (sdyn != NULL)
8626 {
8627 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
8628 BFD_ASSERT (htab->elf.hgot->root.u.def.value
8629 < htab->elf.hgot->root.u.def.section->size);
8630 bfd_put_32 (output_bfd, val, p);
8631 }
8632 }
8633 else
8634 {
8635 info->callbacks->einfo (_("%s not defined in linker created %s\n"),
8636 htab->elf.hgot->root.root.string,
8637 (htab->sgotplt != NULL
8638 ? htab->sgotplt->name : htab->got->name));
8639 bfd_set_error (bfd_error_bad_value);
8640 ret = FALSE;
8641 }
8642
8643 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
8644 }
8645
8646 /* Fill in the first entry in the VxWorks procedure linkage table. */
8647 if (splt && splt->size > 0)
8648 {
8649 /* Use the right PLT. */
8650 const bfd_vma *plt_entry = (info->shared
8651 ? ppc_elf_vxworks_pic_plt0_entry
8652 : ppc_elf_vxworks_plt0_entry);
8653
8654 if (!info->shared)
8655 {
8656 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
8657
8658 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
8659 splt->contents + 0);
8660 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
8661 splt->contents + 4);
8662 }
8663 else
8664 {
8665 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
8666 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
8667 }
8668 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
8669 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
8670 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
8671 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
8672 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
8673 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
8674
8675 if (! info->shared)
8676 {
8677 Elf_Internal_Rela rela;
8678 bfd_byte *loc;
8679
8680 loc = htab->srelplt2->contents;
8681
8682 /* Output the @ha relocation for the first instruction. */
8683 rela.r_offset = (htab->plt->output_section->vma
8684 + htab->plt->output_offset
8685 + 2);
8686 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8687 rela.r_addend = 0;
8688 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8689 loc += sizeof (Elf32_External_Rela);
8690
8691 /* Output the @l relocation for the second instruction. */
8692 rela.r_offset = (htab->plt->output_section->vma
8693 + htab->plt->output_offset
8694 + 6);
8695 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8696 rela.r_addend = 0;
8697 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8698 loc += sizeof (Elf32_External_Rela);
8699
8700 /* Fix up the remaining relocations. They may have the wrong
8701 symbol index for _G_O_T_ or _P_L_T_ depending on the order
8702 in which symbols were output. */
8703 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
8704 {
8705 Elf_Internal_Rela rel;
8706
8707 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8708 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
8709 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8710 loc += sizeof (Elf32_External_Rela);
8711
8712 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8713 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
8714 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8715 loc += sizeof (Elf32_External_Rela);
8716
8717 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
8718 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
8719 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
8720 loc += sizeof (Elf32_External_Rela);
8721 }
8722 }
8723 }
8724
8725 if (htab->glink != NULL
8726 && htab->glink->contents != NULL
8727 && htab->elf.dynamic_sections_created)
8728 {
8729 unsigned char *p;
8730 unsigned char *endp;
8731 bfd_vma res0;
8732 unsigned int i;
8733
8734 /*
8735 * PIC glink code is the following:
8736 *
8737 * # ith PLT code stub.
8738 * addis 11,30,(plt+(i-1)*4-got)@ha
8739 * lwz 11,(plt+(i-1)*4-got)@l(11)
8740 * mtctr 11
8741 * bctr
8742 *
8743 * # A table of branches, one for each plt entry.
8744 * # The idea is that the plt call stub loads ctr and r11 with these
8745 * # addresses, so (r11 - res_0) gives the plt index * 4.
8746 * res_0: b PLTresolve
8747 * res_1: b PLTresolve
8748 * .
8749 * # Some number of entries towards the end can be nops
8750 * res_n_m3: nop
8751 * res_n_m2: nop
8752 * res_n_m1:
8753 *
8754 * PLTresolve:
8755 * addis 11,11,(1f-res_0)@ha
8756 * mflr 0
8757 * bcl 20,31,1f
8758 * 1: addi 11,11,(1b-res_0)@l
8759 * mflr 12
8760 * mtlr 0
8761 * sub 11,11,12 # r11 = index * 4
8762 * addis 12,12,(got+4-1b)@ha
8763 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
8764 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
8765 * mtctr 0
8766 * add 0,11,11
8767 * add 11,0,11 # r11 = index * 12 = reloc offset.
8768 * bctr
8769 */
8770 static const unsigned int pic_plt_resolve[] =
8771 {
8772 ADDIS_11_11,
8773 MFLR_0,
8774 BCL_20_31,
8775 ADDI_11_11,
8776 MFLR_12,
8777 MTLR_0,
8778 SUB_11_11_12,
8779 ADDIS_12_12,
8780 LWZ_0_12,
8781 LWZ_12_12,
8782 MTCTR_0,
8783 ADD_0_11_11,
8784 ADD_11_0_11,
8785 BCTR,
8786 NOP,
8787 NOP
8788 };
8789
8790 /*
8791 * Non-PIC glink code is a little simpler.
8792 *
8793 * # ith PLT code stub.
8794 * lis 11,(plt+(i-1)*4)@ha
8795 * lwz 11,(plt+(i-1)*4)@l(11)
8796 * mtctr 11
8797 * bctr
8798 *
8799 * The branch table is the same, then comes
8800 *
8801 * PLTresolve:
8802 * lis 12,(got+4)@ha
8803 * addis 11,11,(-res_0)@ha
8804 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
8805 * addi 11,11,(-res_0)@l # r11 = index * 4
8806 * mtctr 0
8807 * add 0,11,11
8808 * lwz 12,(got+8)@l(12) # got[2] contains the map address
8809 * add 11,0,11 # r11 = index * 12 = reloc offset.
8810 * bctr
8811 */
8812 static const unsigned int plt_resolve[] =
8813 {
8814 LIS_12,
8815 ADDIS_11_11,
8816 LWZ_0_12,
8817 ADDI_11_11,
8818 MTCTR_0,
8819 ADD_0_11_11,
8820 LWZ_12_12,
8821 ADD_11_0_11,
8822 BCTR,
8823 NOP,
8824 NOP,
8825 NOP,
8826 NOP,
8827 NOP,
8828 NOP,
8829 NOP
8830 };
8831
8832 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
8833 abort ();
8834 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
8835 abort ();
8836
8837 /* Build the branch table, one for each plt entry (less one),
8838 and perhaps some padding. */
8839 p = htab->glink->contents;
8840 p += htab->glink_pltresolve;
8841 endp = htab->glink->contents;
8842 endp += htab->glink->size - GLINK_PLTRESOLVE;
8843 while (p < endp - 8 * 4)
8844 {
8845 bfd_put_32 (output_bfd, B + endp - p, p);
8846 p += 4;
8847 }
8848 while (p < endp)
8849 {
8850 bfd_put_32 (output_bfd, NOP, p);
8851 p += 4;
8852 }
8853
8854 res0 = (htab->glink_pltresolve
8855 + htab->glink->output_section->vma
8856 + htab->glink->output_offset);
8857
8858 /* Last comes the PLTresolve stub. */
8859 if (info->shared)
8860 {
8861 bfd_vma bcl;
8862
8863 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8864 {
8865 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8866 p += 4;
8867 }
8868 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8869
8870 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8871 + htab->glink->output_section->vma
8872 + htab->glink->output_offset);
8873
8874 bfd_put_32 (output_bfd,
8875 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8876 bfd_put_32 (output_bfd,
8877 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8878 bfd_put_32 (output_bfd,
8879 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8880 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8881 {
8882 bfd_put_32 (output_bfd,
8883 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8884 bfd_put_32 (output_bfd,
8885 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8886 }
8887 else
8888 {
8889 bfd_put_32 (output_bfd,
8890 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8891 bfd_put_32 (output_bfd,
8892 LWZ_12_12 + 4, p + 9*4);
8893 }
8894 }
8895 else
8896 {
8897 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8898 {
8899 bfd_put_32 (output_bfd, plt_resolve[i], p);
8900 p += 4;
8901 }
8902 p -= 4 * ARRAY_SIZE (plt_resolve);
8903
8904 bfd_put_32 (output_bfd,
8905 LIS_12 + PPC_HA (got + 4), p + 0*4);
8906 bfd_put_32 (output_bfd,
8907 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8908 bfd_put_32 (output_bfd,
8909 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8910 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8911 {
8912 bfd_put_32 (output_bfd,
8913 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8914 bfd_put_32 (output_bfd,
8915 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8916 }
8917 else
8918 {
8919 bfd_put_32 (output_bfd,
8920 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8921 bfd_put_32 (output_bfd,
8922 LWZ_12_12 + 4, p + 6*4);
8923 }
8924 }
8925 }
8926
8927 return ret;
8928 }
8929 \f
8930 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8931 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8932 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8933 #define TARGET_BIG_NAME "elf32-powerpc"
8934 #define ELF_ARCH bfd_arch_powerpc
8935 #define ELF_TARGET_ID PPC32_ELF_DATA
8936 #define ELF_MACHINE_CODE EM_PPC
8937 #ifdef __QNXTARGET__
8938 #define ELF_MAXPAGESIZE 0x1000
8939 #else
8940 #define ELF_MAXPAGESIZE 0x10000
8941 #endif
8942 #define ELF_MINPAGESIZE 0x1000
8943 #define ELF_COMMONPAGESIZE 0x1000
8944 #define elf_info_to_howto ppc_elf_info_to_howto
8945
8946 #ifdef EM_CYGNUS_POWERPC
8947 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8948 #endif
8949
8950 #ifdef EM_PPC_OLD
8951 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8952 #endif
8953
8954 #define elf_backend_plt_not_loaded 1
8955 #define elf_backend_can_gc_sections 1
8956 #define elf_backend_can_refcount 1
8957 #define elf_backend_rela_normal 1
8958
8959 #define bfd_elf32_mkobject ppc_elf_mkobject
8960 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8961 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8962 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8963 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8964 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8965 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8966 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8967
8968 #define elf_backend_object_p ppc_elf_object_p
8969 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8970 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8971 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8972 #define elf_backend_relocate_section ppc_elf_relocate_section
8973 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8974 #define elf_backend_check_relocs ppc_elf_check_relocs
8975 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8976 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8977 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8978 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8979 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8980 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8981 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8982 #define elf_backend_fake_sections ppc_elf_fake_sections
8983 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8984 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8985 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8986 #define elf_backend_write_core_note ppc_elf_write_core_note
8987 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8988 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8989 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8990 #define elf_backend_write_section ppc_elf_write_section
8991 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8992 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8993 #define elf_backend_action_discarded ppc_elf_action_discarded
8994 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8995 #define elf_backend_post_process_headers _bfd_elf_set_osabi
8996
8997 #include "elf32-target.h"
8998
8999 /* VxWorks Target */
9000
9001 #undef TARGET_LITTLE_SYM
9002 #undef TARGET_LITTLE_NAME
9003
9004 #undef TARGET_BIG_SYM
9005 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
9006 #undef TARGET_BIG_NAME
9007 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
9008
9009 /* VxWorks uses the elf default section flags for .plt. */
9010 static const struct bfd_elf_special_section *
9011 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9012 {
9013 if (sec->name == NULL)
9014 return NULL;
9015
9016 if (strcmp (sec->name, ".plt") == 0)
9017 return _bfd_elf_get_sec_type_attr (abfd, sec);
9018
9019 return ppc_elf_get_sec_type_attr (abfd, sec);
9020 }
9021
9022 /* Like ppc_elf_link_hash_table_create, but overrides
9023 appropriately for VxWorks. */
9024 static struct bfd_link_hash_table *
9025 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9026 {
9027 struct bfd_link_hash_table *ret;
9028
9029 ret = ppc_elf_link_hash_table_create (abfd);
9030 if (ret)
9031 {
9032 struct ppc_elf_link_hash_table *htab
9033 = (struct ppc_elf_link_hash_table *)ret;
9034 htab->is_vxworks = 1;
9035 htab->plt_type = PLT_VXWORKS;
9036 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
9037 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
9038 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
9039 }
9040 return ret;
9041 }
9042
9043 /* Tweak magic VxWorks symbols as they are loaded. */
9044 static bfd_boolean
9045 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
9046 struct bfd_link_info *info,
9047 Elf_Internal_Sym *sym,
9048 const char **namep ATTRIBUTE_UNUSED,
9049 flagword *flagsp ATTRIBUTE_UNUSED,
9050 asection **secp,
9051 bfd_vma *valp)
9052 {
9053 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
9054 valp))
9055 return FALSE;
9056
9057 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
9058 }
9059
9060 static void
9061 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
9062 {
9063 ppc_elf_final_write_processing(abfd, linker);
9064 elf_vxworks_final_write_processing(abfd, linker);
9065 }
9066
9067 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
9068 define it. */
9069 #undef elf_backend_want_plt_sym
9070 #define elf_backend_want_plt_sym 1
9071 #undef elf_backend_want_got_plt
9072 #define elf_backend_want_got_plt 1
9073 #undef elf_backend_got_symbol_offset
9074 #define elf_backend_got_symbol_offset 0
9075 #undef elf_backend_plt_not_loaded
9076 #define elf_backend_plt_not_loaded 0
9077 #undef elf_backend_plt_readonly
9078 #define elf_backend_plt_readonly 1
9079 #undef elf_backend_got_header_size
9080 #define elf_backend_got_header_size 12
9081
9082 #undef bfd_elf32_get_synthetic_symtab
9083
9084 #undef bfd_elf32_bfd_link_hash_table_create
9085 #define bfd_elf32_bfd_link_hash_table_create \
9086 ppc_elf_vxworks_link_hash_table_create
9087 #undef elf_backend_add_symbol_hook
9088 #define elf_backend_add_symbol_hook \
9089 ppc_elf_vxworks_add_symbol_hook
9090 #undef elf_backend_link_output_symbol_hook
9091 #define elf_backend_link_output_symbol_hook \
9092 elf_vxworks_link_output_symbol_hook
9093 #undef elf_backend_final_write_processing
9094 #define elf_backend_final_write_processing \
9095 ppc_elf_vxworks_final_write_processing
9096 #undef elf_backend_get_sec_type_attr
9097 #define elf_backend_get_sec_type_attr \
9098 ppc_elf_vxworks_get_sec_type_attr
9099 #undef elf_backend_emit_relocs
9100 #define elf_backend_emit_relocs \
9101 elf_vxworks_emit_relocs
9102
9103 #undef elf32_bed
9104 #define elf32_bed ppc_elf_vxworks_bed
9105 #undef elf_backend_post_process_headers
9106
9107 #include "elf32-target.h"
GDB Binutils - Deliverables
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