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