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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 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 2 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 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35 #include "elf-vxworks.h"
36
37 /* RELA relocations are used here. */
38
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
50
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
58
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
62
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
64
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
68 [VXWORKS_PLT_ENTRY_SIZE / 4] =
69 {
70 0x3d800000, /* lis r12,0 */
71 0x818c0000, /* lwz r12,0(r12) */
72 0x7d8903a6, /* mtctr r12 */
73 0x4e800420, /* bctr */
74 0x39600000, /* li r11,0 */
75 0x48000000, /* b 14 <.PLT0resolve+0x4> */
76 0x60000000, /* nop */
77 0x60000000, /* nop */
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
80 [VXWORKS_PLT_ENTRY_SIZE / 4] =
81 {
82 0x3d9e0000, /* addis r12,r30,0 */
83 0x818c0000, /* lwz r12,0(r12) */
84 0x7d8903a6, /* mtctr r12 */
85 0x4e800420, /* bctr */
86 0x39600000, /* li r11,0 */
87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
88 0x60000000, /* nop */
89 0x60000000, /* nop */
90 };
91
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
96 {
97 0x3d800000, /* lis r12,0 */
98 0x398c0000, /* addi r12,r12,0 */
99 0x800c0008, /* lwz r0,8(r12) */
100 0x7c0903a6, /* mtctr r0 */
101 0x818c0004, /* lwz r12,4(r12) */
102 0x4e800420, /* bctr */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
108 {
109 0x819e0008, /* lwz r12,8(r30) */
110 0x7d8903a6, /* mtctr r12 */
111 0x819e0004, /* lwz r12,4(r30) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 };
118
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
121
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
129
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
154
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158 \f
159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
160
161 static reloc_howto_type ppc_elf_howto_raw[] = {
162 /* This reloc does nothing. */
163 HOWTO (R_PPC_NONE, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_PPC_NONE", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 /* A standard 32 bit relocation. */
178 HOWTO (R_PPC_ADDR32, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_PPC_ADDR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
194 HOWTO (R_PPC_ADDR24, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 26, /* 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_ADDR24", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0x3fffffc, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* A standard 16 bit relocation. */
209 HOWTO (R_PPC_ADDR16, /* type */
210 0, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC_ADDR16", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 /* A 16 bit relocation without overflow. */
224 HOWTO (R_PPC_ADDR16_LO, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR16_LO", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* The high order 16 bits of an address. */
239 HOWTO (R_PPC_ADDR16_HI, /* type */
240 16, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16_HI", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
255 HOWTO (R_PPC_ADDR16_HA, /* 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 ppc_elf_addr16_ha_reloc, /* special_function */
263 "R_PPC_ADDR16_HA", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
271 HOWTO (R_PPC_ADDR14, /* type */
272 0, /* rightshift */
273 2, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC_ADDR14", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xfffc, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14_BRTAKEN",/* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRNTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A relative 26 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL24, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 26, /* bitsize */
324 TRUE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_signed, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC_REL24", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x3fffffc, /* dst_mask */
332 TRUE), /* pcrel_offset */
333
334 /* A relative 16 bit branch; the lower two bits must be zero. */
335 HOWTO (R_PPC_REL14, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 TRUE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_REL14", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 TRUE), /* pcrel_offset */
348
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14_BRTAKEN", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRNTAKEN",/* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
385 HOWTO (R_PPC_GOT16, /* type */
386 0, /* rightshift */
387 1, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_GOT16", /* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
401 HOWTO (R_PPC_GOT16_LO, /* 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_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16_LO", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_HI, /* type */
418 16, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_HI", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HA, /* 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 ppc_elf_addr16_ha_reloc, /* special_function */
441 "R_PPC_GOT16_HA", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
449 HOWTO (R_PPC_PLTREL24, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 26, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_PPC_PLTREL24", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x3fffffc, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
468 HOWTO (R_PPC_COPY, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_PPC_COPY", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
484 HOWTO (R_PPC_GLOB_DAT, /* 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_GLOB_DAT", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffffffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Marks a procedure linkage table entry for a symbol. */
499 HOWTO (R_PPC_JMP_SLOT, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC_JMP_SLOT", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
516 HOWTO (R_PPC_RELATIVE, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
533 HOWTO (R_PPC_LOCAL24PC, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 26, /* bitsize */
537 TRUE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_signed, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_LOCAL24PC", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0x3fffffc, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 /* Like R_PPC_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative */
578 HOWTO (R_PPC_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_REL32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
591
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
594 HOWTO (R_PPC_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC_PLT16_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HA, /* 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 ppc_elf_addr16_ha_reloc, /* special_function */
666 "R_PPC_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
674 HOWTO (R_PPC_SDAREL16, /* type */
675 0, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_PPC_SDAREL16", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 16-bit section relative relocation. */
689 HOWTO (R_PPC_SECTOFF, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_bitfield, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC_SECTOFF", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* 16-bit lower half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_SECTOFF_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit upper half section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_bitfield, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_SECTOFF_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit upper half adjusted section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_HA, /* type */
735 16, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 ppc_elf_addr16_ha_reloc, /* special_function */
742 "R_PPC_SECTOFF_HA", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Marker reloc for TLS. */
749 HOWTO (R_PPC_TLS,
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_TLS", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
765 HOWTO (R_PPC_DTPMOD32,
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 ppc_elf_unhandled_reloc, /* special_function */
773 "R_PPC_DTPMOD32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
782 HOWTO (R_PPC_DTPREL32,
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc_elf_unhandled_reloc, /* special_function */
790 "R_PPC_DTPREL32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* A 16 bit dtprel reloc. */
797 HOWTO (R_PPC_DTPREL16,
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed, /* complain_on_overflow */
804 ppc_elf_unhandled_reloc, /* special_function */
805 "R_PPC_DTPREL16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* Like DTPREL16, but no overflow. */
812 HOWTO (R_PPC_DTPREL16_LO,
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc_elf_unhandled_reloc, /* special_function */
820 "R_PPC_DTPREL16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
827 HOWTO (R_PPC_DTPREL16_HI,
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
842 HOWTO (R_PPC_DTPREL16_HA,
843 16, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16_HA", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
858 HOWTO (R_PPC_TPREL32,
859 0, /* rightshift */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
861 32, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc_elf_unhandled_reloc, /* special_function */
866 "R_PPC_TPREL32", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffffffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* A 16 bit tprel reloc. */
873 HOWTO (R_PPC_TPREL16,
874 0, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_signed, /* complain_on_overflow */
880 ppc_elf_unhandled_reloc, /* special_function */
881 "R_PPC_TPREL16", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Like TPREL16, but no overflow. */
888 HOWTO (R_PPC_TPREL16_LO,
889 0, /* rightshift */
890 1, /* size (0 = byte, 1 = short, 2 = long) */
891 16, /* bitsize */
892 FALSE, /* pc_relative */
893 0, /* bitpos */
894 complain_overflow_dont, /* complain_on_overflow */
895 ppc_elf_unhandled_reloc, /* special_function */
896 "R_PPC_TPREL16_LO", /* name */
897 FALSE, /* partial_inplace */
898 0, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
901
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
903 HOWTO (R_PPC_TPREL16_HI,
904 16, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL16_HI", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
918 HOWTO (R_PPC_TPREL16_HA,
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16_HA", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
935 HOWTO (R_PPC_GOT_TLSGD16,
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_signed, /* complain_on_overflow */
942 ppc_elf_unhandled_reloc, /* special_function */
943 "R_PPC_GOT_TLSGD16", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like GOT_TLSGD16, but no overflow. */
950 HOWTO (R_PPC_GOT_TLSGD16_LO,
951 0, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_GOT_TLSGD16_LO", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
965 HOWTO (R_PPC_GOT_TLSGD16_HI,
966 16, /* rightshift */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
968 16, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 ppc_elf_unhandled_reloc, /* special_function */
973 "R_PPC_GOT_TLSGD16_HI", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
980 HOWTO (R_PPC_GOT_TLSGD16_HA,
981 16, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16_HA", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
997 HOWTO (R_PPC_GOT_TLSLD16,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_signed, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_GOT_TLSLD16", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like GOT_TLSLD16, but no overflow. */
1012 HOWTO (R_PPC_GOT_TLSLD16_LO,
1013 0, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_GOT_TLSLD16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1027 HOWTO (R_PPC_GOT_TLSLD16_HI,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_GOT_TLSLD16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1042 HOWTO (R_PPC_GOT_TLSLD16_HA,
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16_HA", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1058 HOWTO (R_PPC_GOT_DTPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_GOT_DTPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like GOT_DTPREL16, but no overflow. */
1073 HOWTO (R_PPC_GOT_DTPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_GOT_DTPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_GOT_DTPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_GOT_DTPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_GOT_DTPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1119 HOWTO (R_PPC_GOT_TPREL16,
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_signed, /* complain_on_overflow */
1126 ppc_elf_unhandled_reloc, /* special_function */
1127 "R_PPC_GOT_TPREL16", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like GOT_TPREL16, but no overflow. */
1134 HOWTO (R_PPC_GOT_TPREL16_LO,
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc_elf_unhandled_reloc, /* special_function */
1142 "R_PPC_GOT_TPREL16_LO", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xffff, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1149 HOWTO (R_PPC_GOT_TPREL16_HI,
1150 16, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc_elf_unhandled_reloc, /* special_function */
1157 "R_PPC_GOT_TPREL16_HI", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xffff, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1164 HOWTO (R_PPC_GOT_TPREL16_HA,
1165 16, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16_HA", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1180
1181 /* 32 bit value resulting from the addend minus the symbol. */
1182 HOWTO (R_PPC_EMB_NADDR32, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 32, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield, /* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_PPC_EMB_NADDR32", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffffffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* 16 bit value resulting from the addend minus the symbol. */
1197 HOWTO (R_PPC_EMB_NADDR16, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_bitfield, /* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_PPC_EMB_NADDR16", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* 16 bit value resulting from the addend minus the symbol. */
1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC_EMB_ADDR16_LO", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* The high order 16 bits of the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR16_HI", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1245 16, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc_elf_addr16_ha_reloc, /* special_function */
1252 "R_PPC_EMB_NADDR16_HA", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1261 HOWTO (R_PPC_EMB_SDAI16, /* type */
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_bitfield, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 "R_PPC_EMB_SDAI16", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC_EMB_SDA2I16", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xffff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_signed, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC_EMB_SDA2REL", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1311 HOWTO (R_PPC_EMB_SDA21, /* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_signed, /* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_PPC_EMB_SDA21", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1331
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1335 HOWTO (R_PPC_EMB_RELSDA, /* type */
1336 0, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 TRUE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_signed, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC_EMB_RELSDA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* A 16 bit relative relocation. */
1350 HOWTO (R_PPC_REL16, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 TRUE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_bitfield, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_REL16", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 TRUE), /* pcrel_offset */
1363
1364 /* A 16 bit relative relocation without overflow. */
1365 HOWTO (R_PPC_REL16_LO, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 TRUE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_PPC_REL16_LO", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 TRUE), /* pcrel_offset */
1378
1379 /* The high order 16 bits of a relative address. */
1380 HOWTO (R_PPC_REL16_HI, /* type */
1381 16, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 TRUE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_REL16_HI", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 TRUE), /* pcrel_offset */
1393
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1396 HOWTO (R_PPC_REL16_HA, /* type */
1397 16, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 TRUE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_dont, /* complain_on_overflow */
1403 ppc_elf_addr16_ha_reloc, /* special_function */
1404 "R_PPC_REL16_HA", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xffff, /* dst_mask */
1408 TRUE), /* pcrel_offset */
1409
1410 /* GNU extension to record C++ vtable hierarchy. */
1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1412 0, /* rightshift */
1413 0, /* size (0 = byte, 1 = short, 2 = long) */
1414 0, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 NULL, /* special_function */
1419 "R_PPC_GNU_VTINHERIT", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* GNU extension to record C++ vtable member usage. */
1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1427 0, /* rightshift */
1428 0, /* size (0 = byte, 1 = short, 2 = long) */
1429 0, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 NULL, /* special_function */
1434 "R_PPC_GNU_VTENTRY", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Phony reloc to handle AIX style TOC entries. */
1441 HOWTO (R_PPC_TOC16, /* type */
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 bfd_elf_generic_reloc, /* special_function */
1449 "R_PPC_TOC16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454 };
1455 \f
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1457
1458 static void
1459 ppc_elf_howto_init (void)
1460 {
1461 unsigned int i, type;
1462
1463 for (i = 0;
1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1465 i++)
1466 {
1467 type = ppc_elf_howto_raw[i].type;
1468 if (type >= (sizeof (ppc_elf_howto_table)
1469 / sizeof (ppc_elf_howto_table[0])))
1470 abort ();
1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1472 }
1473 }
1474
1475 static reloc_howto_type *
1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1477 bfd_reloc_code_real_type code)
1478 {
1479 enum elf_ppc_reloc_type r;
1480
1481 /* Initialize howto table if not already done. */
1482 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1483 ppc_elf_howto_init ();
1484
1485 switch (code)
1486 {
1487 default:
1488 return NULL;
1489
1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1575 }
1576
1577 return ppc_elf_howto_table[r];
1578 };
1579
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1581
1582 static void
1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1584 arelent *cache_ptr,
1585 Elf_Internal_Rela *dst)
1586 {
1587 /* Initialize howto table if not already done. */
1588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1589 ppc_elf_howto_init ();
1590
1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1593 }
1594
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1596
1597 static bfd_reloc_status_type
1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1599 arelent *reloc_entry,
1600 asymbol *symbol,
1601 void *data ATTRIBUTE_UNUSED,
1602 asection *input_section,
1603 bfd *output_bfd,
1604 char **error_message ATTRIBUTE_UNUSED)
1605 {
1606 bfd_vma relocation;
1607
1608 if (output_bfd != NULL)
1609 {
1610 reloc_entry->address += input_section->output_offset;
1611 return bfd_reloc_ok;
1612 }
1613
1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1615 return bfd_reloc_outofrange;
1616
1617 if (bfd_is_com_section (symbol->section))
1618 relocation = 0;
1619 else
1620 relocation = symbol->value;
1621
1622 relocation += symbol->section->output_section->vma;
1623 relocation += symbol->section->output_offset;
1624 relocation += reloc_entry->addend;
1625 if (reloc_entry->howto->pc_relative)
1626 relocation -= reloc_entry->address;
1627
1628 reloc_entry->addend += (relocation & 0x8000) << 1;
1629
1630 return bfd_reloc_continue;
1631 }
1632
1633 static bfd_reloc_status_type
1634 ppc_elf_unhandled_reloc (bfd *abfd,
1635 arelent *reloc_entry,
1636 asymbol *symbol,
1637 void *data,
1638 asection *input_section,
1639 bfd *output_bfd,
1640 char **error_message)
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1645 if (output_bfd != NULL)
1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1647 input_section, output_bfd, error_message);
1648
1649 if (error_message != NULL)
1650 {
1651 static char buf[60];
1652 sprintf (buf, _("generic linker can't handle %s"),
1653 reloc_entry->howto->name);
1654 *error_message = buf;
1655 }
1656 return bfd_reloc_dangerous;
1657 }
1658 \f
1659 /* Sections created by the linker. */
1660
1661 typedef struct elf_linker_section
1662 {
1663 /* Pointer to the bfd section. */
1664 asection *section;
1665 /* Section name. */
1666 const char *name;
1667 /* Associated bss section name. */
1668 const char *bss_name;
1669 /* Associated symbol name. */
1670 const char *sym_name;
1671 /* Associated symbol. */
1672 struct elf_link_hash_entry *sym;
1673 } elf_linker_section_t;
1674
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1678
1679 typedef struct elf_linker_section_pointers
1680 {
1681 /* next allocated pointer for this symbol */
1682 struct elf_linker_section_pointers *next;
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1688 elf_linker_section_t *lsect;
1689 } elf_linker_section_pointers_t;
1690
1691 struct ppc_elf_obj_tdata
1692 {
1693 struct elf_obj_tdata elf;
1694
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1697 elf_linker_section_pointers_t **linker_section_pointers;
1698 };
1699
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1702
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1705
1706 /* Override the generic function because we store some extras. */
1707
1708 static bfd_boolean
1709 ppc_elf_mkobject (bfd *abfd)
1710 {
1711 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1712 abfd->tdata.any = bfd_zalloc (abfd, amt);
1713 if (abfd->tdata.any == NULL)
1714 return FALSE;
1715 return TRUE;
1716 }
1717
1718 /* Fix bad default arch selected for a 32 bit input bfd when the
1719 default is 64 bit. */
1720
1721 static bfd_boolean
1722 ppc_elf_object_p (bfd *abfd)
1723 {
1724 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1725 {
1726 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1727
1728 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1729 {
1730 /* Relies on arch after 64 bit default being 32 bit default. */
1731 abfd->arch_info = abfd->arch_info->next;
1732 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1733 }
1734 }
1735 return TRUE;
1736 }
1737
1738 /* Function to set whether a module needs the -mrelocatable bit set. */
1739
1740 static bfd_boolean
1741 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1742 {
1743 BFD_ASSERT (!elf_flags_init (abfd)
1744 || elf_elfheader (abfd)->e_flags == flags);
1745
1746 elf_elfheader (abfd)->e_flags = flags;
1747 elf_flags_init (abfd) = TRUE;
1748 return TRUE;
1749 }
1750
1751 /* Support for core dump NOTE sections. */
1752
1753 static bfd_boolean
1754 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1755 {
1756 int offset;
1757 unsigned int size;
1758
1759 switch (note->descsz)
1760 {
1761 default:
1762 return FALSE;
1763
1764 case 268: /* Linux/PPC. */
1765 /* pr_cursig */
1766 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1767
1768 /* pr_pid */
1769 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1770
1771 /* pr_reg */
1772 offset = 72;
1773 size = 192;
1774
1775 break;
1776 }
1777
1778 /* Make a ".reg/999" section. */
1779 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1780 size, note->descpos + offset);
1781 }
1782
1783 static bfd_boolean
1784 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1785 {
1786 switch (note->descsz)
1787 {
1788 default:
1789 return FALSE;
1790
1791 case 128: /* Linux/PPC elf_prpsinfo. */
1792 elf_tdata (abfd)->core_program
1793 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1794 elf_tdata (abfd)->core_command
1795 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1796 }
1797
1798 /* Note that for some reason, a spurious space is tacked
1799 onto the end of the args in some (at least one anyway)
1800 implementations, so strip it off if it exists. */
1801
1802 {
1803 char *command = elf_tdata (abfd)->core_command;
1804 int n = strlen (command);
1805
1806 if (0 < n && command[n - 1] == ' ')
1807 command[n - 1] = '\0';
1808 }
1809
1810 return TRUE;
1811 }
1812
1813 /* Return address for Ith PLT stub in section PLT, for relocation REL
1814 or (bfd_vma) -1 if it should not be included. */
1815
1816 static bfd_vma
1817 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1818 const asection *plt ATTRIBUTE_UNUSED,
1819 const arelent *rel)
1820 {
1821 return rel->address;
1822 }
1823
1824 /* Handle a PowerPC specific section when reading an object file. This
1825 is called when bfd_section_from_shdr finds a section with an unknown
1826 type. */
1827
1828 static bfd_boolean
1829 ppc_elf_section_from_shdr (bfd *abfd,
1830 Elf_Internal_Shdr *hdr,
1831 const char *name,
1832 int shindex)
1833 {
1834 asection *newsect;
1835 flagword flags;
1836
1837 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1838 return FALSE;
1839
1840 newsect = hdr->bfd_section;
1841 flags = bfd_get_section_flags (abfd, newsect);
1842 if (hdr->sh_flags & SHF_EXCLUDE)
1843 flags |= SEC_EXCLUDE;
1844
1845 if (hdr->sh_type == SHT_ORDERED)
1846 flags |= SEC_SORT_ENTRIES;
1847
1848 bfd_set_section_flags (abfd, newsect, flags);
1849 return TRUE;
1850 }
1851
1852 /* Set up any other section flags and such that may be necessary. */
1853
1854 static bfd_boolean
1855 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1856 Elf_Internal_Shdr *shdr,
1857 asection *asect)
1858 {
1859 if ((asect->flags & SEC_EXCLUDE) != 0)
1860 shdr->sh_flags |= SHF_EXCLUDE;
1861
1862 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1863 shdr->sh_type = SHT_ORDERED;
1864
1865 return TRUE;
1866 }
1867
1868 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1869 need to bump up the number of section headers. */
1870
1871 static int
1872 ppc_elf_additional_program_headers (bfd *abfd)
1873 {
1874 asection *s;
1875 int ret = 0;
1876
1877 s = bfd_get_section_by_name (abfd, ".sbss2");
1878 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1879 ++ret;
1880
1881 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 return ret;
1886 }
1887
1888 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1889 .PPC.EMB.sbss0 a normal section, and not a bss section so
1890 that the linker doesn't crater when trying to make more than
1891 2 sections. */
1892
1893 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1894 {
1895 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1896 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1897 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1898 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1899 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1900 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1901 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1902 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1903 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1904 { NULL, 0, 0, 0, 0 }
1905 };
1906
1907 /* This is what we want for new plt/got. */
1908 static struct bfd_elf_special_section ppc_alt_plt =
1909 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
1910
1911 static const struct bfd_elf_special_section *
1912 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1913 {
1914 const struct bfd_elf_special_section *ssect;
1915
1916 /* See if this is one of the special sections. */
1917 if (sec->name == NULL)
1918 return NULL;
1919
1920 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1921 sec->use_rela_p);
1922 if (ssect != NULL)
1923 {
1924 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1925 ssect = &ppc_alt_plt;
1926 return ssect;
1927 }
1928
1929 return _bfd_elf_get_sec_type_attr (abfd, sec);
1930 }
1931 \f
1932 /* Very simple linked list structure for recording apuinfo values. */
1933 typedef struct apuinfo_list
1934 {
1935 struct apuinfo_list *next;
1936 unsigned long value;
1937 }
1938 apuinfo_list;
1939
1940 static apuinfo_list *head;
1941
1942
1943 static void
1944 apuinfo_list_init (void)
1945 {
1946 head = NULL;
1947 }
1948
1949 static void
1950 apuinfo_list_add (unsigned long value)
1951 {
1952 apuinfo_list *entry = head;
1953
1954 while (entry != NULL)
1955 {
1956 if (entry->value == value)
1957 return;
1958 entry = entry->next;
1959 }
1960
1961 entry = bfd_malloc (sizeof (* entry));
1962 if (entry == NULL)
1963 return;
1964
1965 entry->value = value;
1966 entry->next = head;
1967 head = entry;
1968 }
1969
1970 static unsigned
1971 apuinfo_list_length (void)
1972 {
1973 apuinfo_list *entry;
1974 unsigned long count;
1975
1976 for (entry = head, count = 0;
1977 entry;
1978 entry = entry->next)
1979 ++ count;
1980
1981 return count;
1982 }
1983
1984 static inline unsigned long
1985 apuinfo_list_element (unsigned long number)
1986 {
1987 apuinfo_list * entry;
1988
1989 for (entry = head;
1990 entry && number --;
1991 entry = entry->next)
1992 ;
1993
1994 return entry ? entry->value : 0;
1995 }
1996
1997 static void
1998 apuinfo_list_finish (void)
1999 {
2000 apuinfo_list *entry;
2001
2002 for (entry = head; entry;)
2003 {
2004 apuinfo_list *next = entry->next;
2005 free (entry);
2006 entry = next;
2007 }
2008
2009 head = NULL;
2010 }
2011
2012 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2013 #define APUINFO_LABEL "APUinfo"
2014
2015 /* Scan the input BFDs and create a linked list of
2016 the APUinfo values that will need to be emitted. */
2017
2018 static void
2019 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2020 {
2021 bfd *ibfd;
2022 asection *asec;
2023 char *buffer;
2024 unsigned num_input_sections;
2025 bfd_size_type output_section_size;
2026 unsigned i;
2027 unsigned num_entries;
2028 unsigned long offset;
2029 unsigned long length;
2030 const char *error_message = NULL;
2031
2032 if (link_info == NULL)
2033 return;
2034
2035 /* Scan the input bfds, looking for apuinfo sections. */
2036 num_input_sections = 0;
2037 output_section_size = 0;
2038
2039 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2040 {
2041 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2042 if (asec)
2043 {
2044 ++ num_input_sections;
2045 output_section_size += asec->size;
2046 }
2047 }
2048
2049 /* We need at least one input sections
2050 in order to make merging worthwhile. */
2051 if (num_input_sections < 1)
2052 return;
2053
2054 /* Just make sure that the output section exists as well. */
2055 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2056 if (asec == NULL)
2057 return;
2058
2059 /* Allocate a buffer for the contents of the input sections. */
2060 buffer = bfd_malloc (output_section_size);
2061 if (buffer == NULL)
2062 return;
2063
2064 offset = 0;
2065 apuinfo_list_init ();
2066
2067 /* Read in the input sections contents. */
2068 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2069 {
2070 unsigned long datum;
2071 char *ptr;
2072
2073 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2074 if (asec == NULL)
2075 continue;
2076
2077 length = asec->size;
2078 if (length < 24)
2079 {
2080 error_message = _("corrupt or empty %s section in %B");
2081 goto fail;
2082 }
2083
2084 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2085 || (bfd_bread (buffer + offset, length, ibfd) != length))
2086 {
2087 error_message = _("unable to read in %s section from %B");
2088 goto fail;
2089 }
2090
2091 /* Process the contents of the section. */
2092 ptr = buffer + offset;
2093 error_message = _("corrupt %s section in %B");
2094
2095 /* Verify the contents of the header. Note - we have to
2096 extract the values this way in order to allow for a
2097 host whose endian-ness is different from the target. */
2098 datum = bfd_get_32 (ibfd, ptr);
2099 if (datum != sizeof APUINFO_LABEL)
2100 goto fail;
2101
2102 datum = bfd_get_32 (ibfd, ptr + 8);
2103 if (datum != 0x2)
2104 goto fail;
2105
2106 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2107 goto fail;
2108
2109 /* Get the number of bytes used for apuinfo entries. */
2110 datum = bfd_get_32 (ibfd, ptr + 4);
2111 if (datum + 20 != length)
2112 goto fail;
2113
2114 /* Make sure that we do not run off the end of the section. */
2115 if (offset + length > output_section_size)
2116 goto fail;
2117
2118 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2119 for (i = 0; i < datum; i += 4)
2120 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2121
2122 /* Update the offset. */
2123 offset += length;
2124 }
2125
2126 error_message = NULL;
2127
2128 /* Compute the size of the output section. */
2129 num_entries = apuinfo_list_length ();
2130 output_section_size = 20 + num_entries * 4;
2131
2132 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2133
2134 if (! bfd_set_section_size (abfd, asec, output_section_size))
2135 ibfd = abfd,
2136 error_message = _("warning: unable to set size of %s section in %B");
2137
2138 fail:
2139 free (buffer);
2140
2141 if (error_message)
2142 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2143 }
2144
2145 /* Prevent the output section from accumulating the input sections'
2146 contents. We have already stored this in our linked list structure. */
2147
2148 static bfd_boolean
2149 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2150 asection *asec,
2151 bfd_byte *contents ATTRIBUTE_UNUSED)
2152 {
2153 return (apuinfo_list_length ()
2154 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2155 }
2156
2157 /* Finally we can generate the output section. */
2158
2159 static void
2160 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2161 {
2162 bfd_byte *buffer;
2163 asection *asec;
2164 unsigned i;
2165 unsigned num_entries;
2166 bfd_size_type length;
2167
2168 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2169 if (asec == NULL)
2170 return;
2171
2172 if (apuinfo_list_length () == 0)
2173 return;
2174
2175 length = asec->size;
2176 if (length < 20)
2177 return;
2178
2179 buffer = bfd_malloc (length);
2180 if (buffer == NULL)
2181 {
2182 (*_bfd_error_handler)
2183 (_("failed to allocate space for new APUinfo section."));
2184 return;
2185 }
2186
2187 /* Create the apuinfo header. */
2188 num_entries = apuinfo_list_length ();
2189 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2190 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2191 bfd_put_32 (abfd, 0x2, buffer + 8);
2192 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2193
2194 length = 20;
2195 for (i = 0; i < num_entries; i++)
2196 {
2197 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2198 length += 4;
2199 }
2200
2201 if (length != asec->size)
2202 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2203
2204 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2205 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2206
2207 free (buffer);
2208
2209 apuinfo_list_finish ();
2210 }
2211 \f
2212 /* The following functions are specific to the ELF linker, while
2213 functions above are used generally. They appear in this file more
2214 or less in the order in which they are called. eg.
2215 ppc_elf_check_relocs is called early in the link process,
2216 ppc_elf_finish_dynamic_sections is one of the last functions
2217 called. */
2218
2219 /* The PPC linker needs to keep track of the number of relocs that it
2220 decides to copy as dynamic relocs in check_relocs for each symbol.
2221 This is so that it can later discard them if they are found to be
2222 unnecessary. We store the information in a field extending the
2223 regular ELF linker hash table. */
2224
2225 struct ppc_elf_dyn_relocs
2226 {
2227 struct ppc_elf_dyn_relocs *next;
2228
2229 /* The input section of the reloc. */
2230 asection *sec;
2231
2232 /* Total number of relocs copied for the input section. */
2233 bfd_size_type count;
2234
2235 /* Number of pc-relative relocs copied for the input section. */
2236 bfd_size_type pc_count;
2237 };
2238
2239 /* Track PLT entries needed for a given symbol. We might need more
2240 than one glink entry per symbol. */
2241 struct plt_entry
2242 {
2243 struct plt_entry *next;
2244
2245 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2246 This field stores the offset into .got2 used to initialise the
2247 GOT pointer reg. It will always be at least 32768 (and for
2248 current gcc this is the only offset used). */
2249 bfd_vma addend;
2250
2251 /* The .got2 section. */
2252 asection *sec;
2253
2254 /* PLT refcount or offset. */
2255 union
2256 {
2257 bfd_signed_vma refcount;
2258 bfd_vma offset;
2259 } plt;
2260
2261 /* .glink stub offset. */
2262 bfd_vma glink_offset;
2263 };
2264
2265 /* Of those relocs that might be copied as dynamic relocs, this macro
2266 selects those that must be copied when linking a shared library,
2267 even when the symbol is local. */
2268
2269 #define MUST_BE_DYN_RELOC(RTYPE) \
2270 ((RTYPE) != R_PPC_REL24 \
2271 && (RTYPE) != R_PPC_REL14 \
2272 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2273 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2274 && (RTYPE) != R_PPC_REL32)
2275
2276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2277 copying dynamic variables from a shared lib into an app's dynbss
2278 section, and instead use a dynamic relocation to point into the
2279 shared lib. */
2280 #define ELIMINATE_COPY_RELOCS 1
2281
2282 /* PPC ELF linker hash entry. */
2283
2284 struct ppc_elf_link_hash_entry
2285 {
2286 struct elf_link_hash_entry elf;
2287
2288 /* If this symbol is used in the linker created sections, the processor
2289 specific backend uses this field to map the field into the offset
2290 from the beginning of the section. */
2291 elf_linker_section_pointers_t *linker_section_pointer;
2292
2293 /* Track dynamic relocs copied for this symbol. */
2294 struct ppc_elf_dyn_relocs *dyn_relocs;
2295
2296 /* Contexts in which symbol is used in the GOT (or TOC).
2297 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2298 corresponding relocs are encountered during check_relocs.
2299 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2300 indicate the corresponding GOT entry type is not needed. */
2301 #define TLS_GD 1 /* GD reloc. */
2302 #define TLS_LD 2 /* LD reloc. */
2303 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2304 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2305 #define TLS_TLS 16 /* Any TLS reloc. */
2306 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2307 char tls_mask;
2308
2309 /* Nonzero if we have seen a small data relocation referring to this
2310 symbol. */
2311 unsigned char has_sda_refs;
2312 };
2313
2314 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2315
2316 /* PPC ELF linker hash table. */
2317
2318 struct ppc_elf_link_hash_table
2319 {
2320 struct elf_link_hash_table elf;
2321
2322 /* Short-cuts to get to dynamic linker sections. */
2323 asection *got;
2324 asection *relgot;
2325 asection *glink;
2326 asection *plt;
2327 asection *relplt;
2328 asection *dynbss;
2329 asection *relbss;
2330 asection *dynsbss;
2331 asection *relsbss;
2332 elf_linker_section_t sdata[2];
2333 asection *sbss;
2334
2335 /* Shortcut to .__tls_get_addr. */
2336 struct elf_link_hash_entry *tls_get_addr;
2337
2338 /* TLS local dynamic got entry handling. */
2339 union {
2340 bfd_signed_vma refcount;
2341 bfd_vma offset;
2342 } tlsld_got;
2343
2344 /* Offset of PltResolve function in glink. */
2345 bfd_vma glink_pltresolve;
2346
2347 /* Size of reserved GOT entries. */
2348 unsigned int got_header_size;
2349 /* Non-zero if allocating the header left a gap. */
2350 unsigned int got_gap;
2351
2352 /* Whether to use new plt/got layout or not. */
2353 unsigned int new_plt:1;
2354 unsigned int old_plt:1;
2355
2356 /* Small local sym to section mapping cache. */
2357 struct sym_sec_cache sym_sec;
2358
2359 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2360 asection *srelplt2;
2361
2362 /* The .got.plt section (VxWorks only)*/
2363 asection *sgotplt;
2364
2365 /* Short-cuts to frequently used symbols on VxWorks targets. */
2366 struct elf_link_hash_entry *hplt;
2367
2368 /* True if the target system is VxWorks. */
2369 int is_vxworks;
2370
2371 /* The size of PLT entries. */
2372 int plt_entry_size;
2373 /* The distance between adjacent PLT slots. */
2374 int plt_slot_size;
2375 /* The size of the first PLT entry. */
2376 int plt_initial_entry_size;
2377 };
2378
2379 /* Get the PPC ELF linker hash table from a link_info structure. */
2380
2381 #define ppc_elf_hash_table(p) \
2382 ((struct ppc_elf_link_hash_table *) (p)->hash)
2383
2384 /* Create an entry in a PPC ELF linker hash table. */
2385
2386 static struct bfd_hash_entry *
2387 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2388 struct bfd_hash_table *table,
2389 const char *string)
2390 {
2391 /* Allocate the structure if it has not already been allocated by a
2392 subclass. */
2393 if (entry == NULL)
2394 {
2395 entry = bfd_hash_allocate (table,
2396 sizeof (struct ppc_elf_link_hash_entry));
2397 if (entry == NULL)
2398 return entry;
2399 }
2400
2401 /* Call the allocation method of the superclass. */
2402 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2403 if (entry != NULL)
2404 {
2405 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2406 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2407 ppc_elf_hash_entry (entry)->tls_mask = 0;
2408 }
2409
2410 return entry;
2411 }
2412
2413 /* Create a PPC ELF linker hash table. */
2414
2415 static struct bfd_link_hash_table *
2416 ppc_elf_link_hash_table_create (bfd *abfd)
2417 {
2418 struct ppc_elf_link_hash_table *ret;
2419
2420 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2421 if (ret == NULL)
2422 return NULL;
2423
2424 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2425 ppc_elf_link_hash_newfunc))
2426 {
2427 free (ret);
2428 return NULL;
2429 }
2430
2431 ret->elf.init_plt_refcount.refcount = 0;
2432 ret->elf.init_plt_refcount.glist = NULL;
2433 ret->elf.init_plt_offset.offset = 0;
2434 ret->elf.init_plt_offset.glist = NULL;
2435
2436 ret->sdata[0].name = ".sdata";
2437 ret->sdata[0].sym_name = "_SDA_BASE_";
2438 ret->sdata[0].bss_name = ".sbss";
2439
2440 ret->sdata[1].name = ".sdata2";
2441 ret->sdata[1].sym_name = "_SDA2_BASE_";
2442 ret->sdata[1].bss_name = ".sbss2";
2443
2444 ret->plt_entry_size = 12;
2445 ret->plt_slot_size = 8;
2446 ret->plt_initial_entry_size = 72;
2447
2448 ret->is_vxworks = 0;
2449
2450 return &ret->elf.root;
2451 }
2452
2453 /* Create .got and the related sections. */
2454
2455 static bfd_boolean
2456 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2457 {
2458 struct ppc_elf_link_hash_table *htab;
2459 asection *s;
2460 flagword flags;
2461
2462 if (!_bfd_elf_create_got_section (abfd, info))
2463 return FALSE;
2464
2465 htab = ppc_elf_hash_table (info);
2466 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2467 if (s == NULL)
2468 abort ();
2469
2470 if (htab->is_vxworks)
2471 {
2472 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2473 if (!htab->sgotplt)
2474 abort ();
2475 }
2476 else
2477 {
2478 /* The powerpc .got has a blrl instruction in it. Mark it
2479 executable. */
2480 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2481 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2482 if (!bfd_set_section_flags (abfd, s, flags))
2483 return FALSE;
2484 }
2485
2486 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2487 | SEC_LINKER_CREATED | SEC_READONLY);
2488 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2489 if (!htab->relgot
2490 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2491 return FALSE;
2492
2493 return TRUE;
2494 }
2495
2496 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2497 to output sections (just like _bfd_elf_create_dynamic_sections has
2498 to create .dynbss and .rela.bss). */
2499
2500 static bfd_boolean
2501 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2502 {
2503 struct ppc_elf_link_hash_table *htab;
2504 asection *s;
2505 flagword flags;
2506
2507 htab = ppc_elf_hash_table (info);
2508
2509 if (htab->got == NULL
2510 && !ppc_elf_create_got (abfd, info))
2511 return FALSE;
2512
2513 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2514 return FALSE;
2515
2516 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2517 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2518
2519 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2520 htab->glink = s;
2521 if (s == NULL
2522 || !bfd_set_section_alignment (abfd, s, 4))
2523 return FALSE;
2524
2525 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2526 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2527 SEC_ALLOC | SEC_LINKER_CREATED);
2528 htab->dynsbss = s;
2529 if (s == NULL)
2530 return FALSE;
2531
2532 if (! info->shared)
2533 {
2534 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2535 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2536 htab->relsbss = s;
2537 if (s == NULL
2538 || ! bfd_set_section_alignment (abfd, s, 2))
2539 return FALSE;
2540 }
2541
2542 /* Create the section for VxWorks static plt relocations. */
2543 if (htab->is_vxworks && !info->shared)
2544 {
2545 s = bfd_make_section (abfd, ".rela.plt.unloaded");
2546 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY
2547 | SEC_LINKER_CREATED);
2548 if (s == NULL
2549 || ! bfd_set_section_flags (abfd, s, flags)
2550 || ! bfd_set_section_alignment (abfd, s,
2551 get_elf_backend_data (abfd)->s->log_file_align))
2552 return FALSE;
2553 htab->srelplt2 = s;
2554 }
2555
2556 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2557 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2558 if (s == NULL)
2559 abort ();
2560
2561 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2562 return bfd_set_section_flags (abfd, s, flags);
2563 }
2564
2565 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2566
2567 static void
2568 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
2569 struct elf_link_hash_entry *dir,
2570 struct elf_link_hash_entry *ind)
2571 {
2572 struct ppc_elf_link_hash_entry *edir, *eind;
2573 bfd_signed_vma tmp;
2574
2575 edir = (struct ppc_elf_link_hash_entry *) dir;
2576 eind = (struct ppc_elf_link_hash_entry *) ind;
2577
2578 if (eind->dyn_relocs != NULL)
2579 {
2580 if (edir->dyn_relocs != NULL)
2581 {
2582 struct ppc_elf_dyn_relocs **pp;
2583 struct ppc_elf_dyn_relocs *p;
2584
2585 if (ind->root.type == bfd_link_hash_indirect)
2586 abort ();
2587
2588 /* Add reloc counts against the weak sym to the strong sym
2589 list. Merge any entries against the same section. */
2590 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2591 {
2592 struct ppc_elf_dyn_relocs *q;
2593
2594 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2595 if (q->sec == p->sec)
2596 {
2597 q->pc_count += p->pc_count;
2598 q->count += p->count;
2599 *pp = p->next;
2600 break;
2601 }
2602 if (q == NULL)
2603 pp = &p->next;
2604 }
2605 *pp = edir->dyn_relocs;
2606 }
2607
2608 edir->dyn_relocs = eind->dyn_relocs;
2609 eind->dyn_relocs = NULL;
2610 }
2611
2612 edir->tls_mask |= eind->tls_mask;
2613 edir->has_sda_refs |= eind->has_sda_refs;
2614
2615 /* If called to transfer flags for a weakdef during processing
2616 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2617 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2618 if (!(ELIMINATE_COPY_RELOCS
2619 && eind->elf.root.type != bfd_link_hash_indirect
2620 && edir->elf.dynamic_adjusted))
2621 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2622
2623 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2624 edir->elf.ref_regular |= eind->elf.ref_regular;
2625 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2626 edir->elf.needs_plt |= eind->elf.needs_plt;
2627
2628 /* If we were called to copy over info for a weak sym, that's all. */
2629 if (eind->elf.root.type != bfd_link_hash_indirect)
2630 return;
2631
2632 /* Copy over the GOT refcount entries that we may have already seen to
2633 the symbol which just became indirect. */
2634 tmp = edir->elf.got.refcount;
2635 if (tmp < 1)
2636 {
2637 edir->elf.got.refcount = eind->elf.got.refcount;
2638 eind->elf.got.refcount = tmp;
2639 }
2640 else
2641 BFD_ASSERT (eind->elf.got.refcount < 1);
2642
2643 /* And plt entries. */
2644 if (eind->elf.plt.plist != NULL)
2645 {
2646 if (edir->elf.plt.plist != NULL)
2647 {
2648 struct plt_entry **entp;
2649 struct plt_entry *ent;
2650
2651 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2652 {
2653 struct plt_entry *dent;
2654
2655 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2656 if (dent->sec == ent->sec && dent->addend == ent->addend)
2657 {
2658 dent->plt.refcount += ent->plt.refcount;
2659 *entp = ent->next;
2660 break;
2661 }
2662 if (dent == NULL)
2663 entp = &ent->next;
2664 }
2665 *entp = edir->elf.plt.plist;
2666 }
2667
2668 edir->elf.plt.plist = eind->elf.plt.plist;
2669 eind->elf.plt.plist = NULL;
2670 }
2671
2672 if (edir->elf.dynindx == -1)
2673 {
2674 edir->elf.dynindx = eind->elf.dynindx;
2675 edir->elf.dynstr_index = eind->elf.dynstr_index;
2676 eind->elf.dynindx = -1;
2677 eind->elf.dynstr_index = 0;
2678 }
2679 else
2680 BFD_ASSERT (eind->elf.dynindx == -1);
2681 }
2682
2683 /* Return 1 if target is one of ours. */
2684
2685 static bfd_boolean
2686 is_ppc_elf_target (const struct bfd_target *targ)
2687 {
2688 extern const bfd_target bfd_elf32_powerpc_vec;
2689 extern const bfd_target bfd_elf32_powerpcle_vec;
2690
2691 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2692 }
2693
2694 /* Hook called by the linker routine which adds symbols from an object
2695 file. We use it to put .comm items in .sbss, and not .bss. */
2696
2697 static bfd_boolean
2698 ppc_elf_add_symbol_hook (bfd *abfd,
2699 struct bfd_link_info *info,
2700 Elf_Internal_Sym *sym,
2701 const char **namep ATTRIBUTE_UNUSED,
2702 flagword *flagsp ATTRIBUTE_UNUSED,
2703 asection **secp,
2704 bfd_vma *valp)
2705 {
2706 if (sym->st_shndx == SHN_COMMON
2707 && !info->relocatable
2708 && sym->st_size <= elf_gp_size (abfd)
2709 && is_ppc_elf_target (info->hash->creator))
2710 {
2711 /* Common symbols less than or equal to -G nn bytes are automatically
2712 put into .sbss. */
2713 struct ppc_elf_link_hash_table *htab;
2714
2715 htab = ppc_elf_hash_table (info);
2716 if (htab->sbss == NULL)
2717 {
2718 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2719
2720 if (!htab->elf.dynobj)
2721 htab->elf.dynobj = abfd;
2722
2723 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2724 ".sbss",
2725 flags);
2726 if (htab->sbss == NULL)
2727 return FALSE;
2728 }
2729
2730 *secp = htab->sbss;
2731 *valp = sym->st_size;
2732 }
2733
2734 return TRUE;
2735 }
2736 \f
2737 static bfd_boolean
2738 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2739 elf_linker_section_t *lsect)
2740 {
2741 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2742 TRUE, FALSE, TRUE);
2743 if (lsect->sym == NULL)
2744 return FALSE;
2745 if (lsect->sym->root.type == bfd_link_hash_new)
2746 lsect->sym->non_elf = 0;
2747 lsect->sym->ref_regular = 1;
2748 return TRUE;
2749 }
2750
2751 /* Create a special linker section. */
2752
2753 static bfd_boolean
2754 ppc_elf_create_linker_section (bfd *abfd,
2755 struct bfd_link_info *info,
2756 flagword flags,
2757 elf_linker_section_t *lsect)
2758 {
2759 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2760 asection *s;
2761
2762 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2763 | SEC_LINKER_CREATED);
2764
2765 /* Record the first bfd that needs the special sections. */
2766 if (!htab->elf.dynobj)
2767 htab->elf.dynobj = abfd;
2768
2769 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2770 lsect->name,
2771 flags);
2772 if (s == NULL
2773 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2774 return FALSE;
2775 lsect->section = s;
2776
2777 return create_sdata_sym (htab, lsect);
2778 }
2779
2780 /* Find a linker generated pointer with a given addend and type. */
2781
2782 static elf_linker_section_pointers_t *
2783 elf_find_pointer_linker_section
2784 (elf_linker_section_pointers_t *linker_pointers,
2785 bfd_vma addend,
2786 elf_linker_section_t *lsect)
2787 {
2788 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2789 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2790 return linker_pointers;
2791
2792 return NULL;
2793 }
2794
2795 /* Allocate a pointer to live in a linker created section. */
2796
2797 static bfd_boolean
2798 elf_create_pointer_linker_section (bfd *abfd,
2799 elf_linker_section_t *lsect,
2800 struct elf_link_hash_entry *h,
2801 const Elf_Internal_Rela *rel)
2802 {
2803 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2804 elf_linker_section_pointers_t *linker_section_ptr;
2805 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2806 bfd_size_type amt;
2807
2808 BFD_ASSERT (lsect != NULL);
2809
2810 /* Is this a global symbol? */
2811 if (h != NULL)
2812 {
2813 struct ppc_elf_link_hash_entry *eh;
2814
2815 /* Has this symbol already been allocated? If so, our work is done. */
2816 eh = (struct ppc_elf_link_hash_entry *) h;
2817 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2818 rel->r_addend,
2819 lsect))
2820 return TRUE;
2821
2822 ptr_linker_section_ptr = &eh->linker_section_pointer;
2823 }
2824 else
2825 {
2826 /* Allocation of a pointer to a local symbol. */
2827 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2828
2829 /* Allocate a table to hold the local symbols if first time. */
2830 if (!ptr)
2831 {
2832 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2833
2834 amt = num_symbols;
2835 amt *= sizeof (elf_linker_section_pointers_t *);
2836 ptr = bfd_zalloc (abfd, amt);
2837
2838 if (!ptr)
2839 return FALSE;
2840
2841 elf_local_ptr_offsets (abfd) = ptr;
2842 }
2843
2844 /* Has this symbol already been allocated? If so, our work is done. */
2845 if (elf_find_pointer_linker_section (ptr[r_symndx],
2846 rel->r_addend,
2847 lsect))
2848 return TRUE;
2849
2850 ptr_linker_section_ptr = &ptr[r_symndx];
2851 }
2852
2853 /* Allocate space for a pointer in the linker section, and allocate
2854 a new pointer record from internal memory. */
2855 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2856 amt = sizeof (elf_linker_section_pointers_t);
2857 linker_section_ptr = bfd_alloc (abfd, amt);
2858
2859 if (!linker_section_ptr)
2860 return FALSE;
2861
2862 linker_section_ptr->next = *ptr_linker_section_ptr;
2863 linker_section_ptr->addend = rel->r_addend;
2864 linker_section_ptr->lsect = lsect;
2865 *ptr_linker_section_ptr = linker_section_ptr;
2866
2867 linker_section_ptr->offset = lsect->section->size;
2868 lsect->section->size += 4;
2869
2870 #ifdef DEBUG
2871 fprintf (stderr,
2872 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2873 lsect->name, (long) linker_section_ptr->offset,
2874 (long) lsect->section->size);
2875 #endif
2876
2877 return TRUE;
2878 }
2879
2880 static bfd_boolean
2881 update_local_sym_info (bfd *abfd,
2882 Elf_Internal_Shdr *symtab_hdr,
2883 unsigned long r_symndx,
2884 int tls_type)
2885 {
2886 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2887 char *local_got_tls_masks;
2888
2889 if (local_got_refcounts == NULL)
2890 {
2891 bfd_size_type size = symtab_hdr->sh_info;
2892
2893 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2894 local_got_refcounts = bfd_zalloc (abfd, size);
2895 if (local_got_refcounts == NULL)
2896 return FALSE;
2897 elf_local_got_refcounts (abfd) = local_got_refcounts;
2898 }
2899
2900 local_got_refcounts[r_symndx] += 1;
2901 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2902 local_got_tls_masks[r_symndx] |= tls_type;
2903 return TRUE;
2904 }
2905
2906 static bfd_boolean
2907 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2908 asection *sec, bfd_vma addend)
2909 {
2910 struct plt_entry *ent;
2911
2912 if (addend < 32768)
2913 sec = NULL;
2914 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2915 if (ent->sec == sec && ent->addend == addend)
2916 break;
2917 if (ent == NULL)
2918 {
2919 bfd_size_type amt = sizeof (*ent);
2920 ent = bfd_alloc (abfd, amt);
2921 if (ent == NULL)
2922 return FALSE;
2923 ent->next = h->plt.plist;
2924 ent->sec = sec;
2925 ent->addend = addend;
2926 ent->plt.refcount = 0;
2927 h->plt.plist = ent;
2928 }
2929 ent->plt.refcount += 1;
2930 return TRUE;
2931 }
2932
2933 static struct plt_entry *
2934 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2935 {
2936 struct plt_entry *ent;
2937
2938 if (addend < 32768)
2939 sec = NULL;
2940 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2941 if (ent->sec == sec && ent->addend == addend)
2942 break;
2943 return ent;
2944 }
2945
2946 static void
2947 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2948 {
2949 (*_bfd_error_handler)
2950 (_("%B: relocation %s cannot be used when making a shared object"),
2951 abfd,
2952 ppc_elf_howto_table[r_type]->name);
2953 bfd_set_error (bfd_error_bad_value);
2954 }
2955
2956 /* Look through the relocs for a section during the first phase, and
2957 allocate space in the global offset table or procedure linkage
2958 table. */
2959
2960 static bfd_boolean
2961 ppc_elf_check_relocs (bfd *abfd,
2962 struct bfd_link_info *info,
2963 asection *sec,
2964 const Elf_Internal_Rela *relocs)
2965 {
2966 struct ppc_elf_link_hash_table *htab;
2967 Elf_Internal_Shdr *symtab_hdr;
2968 struct elf_link_hash_entry **sym_hashes;
2969 const Elf_Internal_Rela *rel;
2970 const Elf_Internal_Rela *rel_end;
2971 asection *got2, *sreloc;
2972
2973 if (info->relocatable)
2974 return TRUE;
2975
2976 /* Don't do anything special with non-loaded, non-alloced sections.
2977 In particular, any relocs in such sections should not affect GOT
2978 and PLT reference counting (ie. we don't allow them to create GOT
2979 or PLT entries), there's no possibility or desire to optimize TLS
2980 relocs, and there's not much point in propagating relocs to shared
2981 libs that the dynamic linker won't relocate. */
2982 if ((sec->flags & SEC_ALLOC) == 0)
2983 return TRUE;
2984
2985 #ifdef DEBUG
2986 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2987 sec, abfd);
2988 #endif
2989
2990 /* Initialize howto table if not already done. */
2991 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2992 ppc_elf_howto_init ();
2993
2994 htab = ppc_elf_hash_table (info);
2995 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2996 sym_hashes = elf_sym_hashes (abfd);
2997 got2 = bfd_get_section_by_name (abfd, ".got2");
2998 sreloc = NULL;
2999
3000 rel_end = relocs + sec->reloc_count;
3001 for (rel = relocs; rel < rel_end; rel++)
3002 {
3003 unsigned long r_symndx;
3004 enum elf_ppc_reloc_type r_type;
3005 struct elf_link_hash_entry *h;
3006 int tls_type = 0;
3007
3008 r_symndx = ELF32_R_SYM (rel->r_info);
3009 if (r_symndx < symtab_hdr->sh_info)
3010 h = NULL;
3011 else
3012 {
3013 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3014 while (h->root.type == bfd_link_hash_indirect
3015 || h->root.type == bfd_link_hash_warning)
3016 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3017 }
3018
3019 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3020 This shows up in particular in an R_PPC_ADDR32 in the eabi
3021 startup code. */
3022 if (h != NULL
3023 && htab->got == NULL
3024 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3025 {
3026 if (htab->elf.dynobj == NULL)
3027 htab->elf.dynobj = abfd;
3028 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3029 return FALSE;
3030 BFD_ASSERT (h == htab->elf.hgot);
3031 }
3032
3033 r_type = ELF32_R_TYPE (rel->r_info);
3034 switch (r_type)
3035 {
3036 case R_PPC_GOT_TLSLD16:
3037 case R_PPC_GOT_TLSLD16_LO:
3038 case R_PPC_GOT_TLSLD16_HI:
3039 case R_PPC_GOT_TLSLD16_HA:
3040 htab->tlsld_got.refcount += 1;
3041 tls_type = TLS_TLS | TLS_LD;
3042 goto dogottls;
3043
3044 case R_PPC_GOT_TLSGD16:
3045 case R_PPC_GOT_TLSGD16_LO:
3046 case R_PPC_GOT_TLSGD16_HI:
3047 case R_PPC_GOT_TLSGD16_HA:
3048 tls_type = TLS_TLS | TLS_GD;
3049 goto dogottls;
3050
3051 case R_PPC_GOT_TPREL16:
3052 case R_PPC_GOT_TPREL16_LO:
3053 case R_PPC_GOT_TPREL16_HI:
3054 case R_PPC_GOT_TPREL16_HA:
3055 if (info->shared)
3056 info->flags |= DF_STATIC_TLS;
3057 tls_type = TLS_TLS | TLS_TPREL;
3058 goto dogottls;
3059
3060 case R_PPC_GOT_DTPREL16:
3061 case R_PPC_GOT_DTPREL16_LO:
3062 case R_PPC_GOT_DTPREL16_HI:
3063 case R_PPC_GOT_DTPREL16_HA:
3064 tls_type = TLS_TLS | TLS_DTPREL;
3065 dogottls:
3066 sec->has_tls_reloc = 1;
3067 /* Fall thru */
3068
3069 /* GOT16 relocations */
3070 case R_PPC_GOT16:
3071 case R_PPC_GOT16_LO:
3072 case R_PPC_GOT16_HI:
3073 case R_PPC_GOT16_HA:
3074 /* This symbol requires a global offset table entry. */
3075 if (htab->got == NULL)
3076 {
3077 if (htab->elf.dynobj == NULL)
3078 htab->elf.dynobj = abfd;
3079 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3080 return FALSE;
3081 }
3082 if (h != NULL)
3083 {
3084 h->got.refcount += 1;
3085 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3086 }
3087 else
3088 /* This is a global offset table entry for a local symbol. */
3089 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3090 return FALSE;
3091 break;
3092
3093 /* Indirect .sdata relocation. */
3094 case R_PPC_EMB_SDAI16:
3095 if (info->shared)
3096 {
3097 bad_shared_reloc (abfd, r_type);
3098 return FALSE;
3099 }
3100 if (htab->sdata[0].section == NULL
3101 && !ppc_elf_create_linker_section (abfd, info, 0,
3102 &htab->sdata[0]))
3103 return FALSE;
3104 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3105 h, rel))
3106 return FALSE;
3107 if (h != NULL)
3108 {
3109 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3110 h->non_got_ref = TRUE;
3111 }
3112 break;
3113
3114 /* Indirect .sdata2 relocation. */
3115 case R_PPC_EMB_SDA2I16:
3116 if (info->shared)
3117 {
3118 bad_shared_reloc (abfd, r_type);
3119 return FALSE;
3120 }
3121 if (htab->sdata[1].section == NULL
3122 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3123 &htab->sdata[1]))
3124 return FALSE;
3125 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3126 h, rel))
3127 return FALSE;
3128 if (h != NULL)
3129 {
3130 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3131 h->non_got_ref = TRUE;
3132 }
3133 break;
3134
3135 case R_PPC_SDAREL16:
3136 if (info->shared)
3137 {
3138 bad_shared_reloc (abfd, r_type);
3139 return FALSE;
3140 }
3141 if (htab->sdata[0].sym == NULL
3142 && !create_sdata_sym (htab, &htab->sdata[0]))
3143 return FALSE;
3144 if (h != NULL)
3145 {
3146 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3147 h->non_got_ref = TRUE;
3148 }
3149 break;
3150
3151 case R_PPC_EMB_SDA2REL:
3152 if (info->shared)
3153 {
3154 bad_shared_reloc (abfd, r_type);
3155 return FALSE;
3156 }
3157 if (htab->sdata[1].sym == NULL
3158 && !create_sdata_sym (htab, &htab->sdata[1]))
3159 return FALSE;
3160 if (h != NULL)
3161 {
3162 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3163 h->non_got_ref = TRUE;
3164 }
3165 break;
3166
3167 case R_PPC_EMB_SDA21:
3168 case R_PPC_EMB_RELSDA:
3169 if (info->shared)
3170 {
3171 bad_shared_reloc (abfd, r_type);
3172 return FALSE;
3173 }
3174 if (htab->sdata[0].sym == NULL
3175 && !create_sdata_sym (htab, &htab->sdata[0]))
3176 return FALSE;
3177 if (htab->sdata[1].sym == NULL
3178 && !create_sdata_sym (htab, &htab->sdata[1]))
3179 return FALSE;
3180 if (h != NULL)
3181 {
3182 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3183 h->non_got_ref = TRUE;
3184 }
3185 break;
3186
3187 case R_PPC_EMB_NADDR32:
3188 case R_PPC_EMB_NADDR16:
3189 case R_PPC_EMB_NADDR16_LO:
3190 case R_PPC_EMB_NADDR16_HI:
3191 case R_PPC_EMB_NADDR16_HA:
3192 if (info->shared)
3193 {
3194 bad_shared_reloc (abfd, r_type);
3195 return FALSE;
3196 }
3197 if (h != NULL)
3198 h->non_got_ref = TRUE;
3199 break;
3200
3201 case R_PPC_PLT32:
3202 case R_PPC_PLTREL24:
3203 case R_PPC_PLTREL32:
3204 case R_PPC_PLT16_LO:
3205 case R_PPC_PLT16_HI:
3206 case R_PPC_PLT16_HA:
3207 #ifdef DEBUG
3208 fprintf (stderr, "Reloc requires a PLT entry\n");
3209 #endif
3210 /* This symbol requires a procedure linkage table entry. We
3211 actually build the entry in finish_dynamic_symbol,
3212 because this might be a case of linking PIC code without
3213 linking in any dynamic objects, in which case we don't
3214 need to generate a procedure linkage table after all. */
3215
3216 if (h == NULL)
3217 {
3218 /* It does not make sense to have a procedure linkage
3219 table entry for a local symbol. */
3220 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3221 "local symbol"),
3222 abfd,
3223 sec,
3224 (long) rel->r_offset,
3225 ppc_elf_howto_table[r_type]->name);
3226 bfd_set_error (bfd_error_bad_value);
3227 return FALSE;
3228 }
3229 else
3230 {
3231 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3232
3233 h->needs_plt = 1;
3234 if (!update_plt_info (abfd, h, got2, addend))
3235 return FALSE;
3236 }
3237 break;
3238
3239 /* The following relocations don't need to propagate the
3240 relocation if linking a shared object since they are
3241 section relative. */
3242 case R_PPC_SECTOFF:
3243 case R_PPC_SECTOFF_LO:
3244 case R_PPC_SECTOFF_HI:
3245 case R_PPC_SECTOFF_HA:
3246 case R_PPC_DTPREL16:
3247 case R_PPC_DTPREL16_LO:
3248 case R_PPC_DTPREL16_HI:
3249 case R_PPC_DTPREL16_HA:
3250 case R_PPC_TOC16:
3251 break;
3252
3253 case R_PPC_REL16:
3254 case R_PPC_REL16_LO:
3255 case R_PPC_REL16_HI:
3256 case R_PPC_REL16_HA:
3257 htab->new_plt = 1;
3258 break;
3259
3260 /* These are just markers. */
3261 case R_PPC_TLS:
3262 case R_PPC_EMB_MRKREF:
3263 case R_PPC_NONE:
3264 case R_PPC_max:
3265 break;
3266
3267 /* These should only appear in dynamic objects. */
3268 case R_PPC_COPY:
3269 case R_PPC_GLOB_DAT:
3270 case R_PPC_JMP_SLOT:
3271 case R_PPC_RELATIVE:
3272 break;
3273
3274 /* These aren't handled yet. We'll report an error later. */
3275 case R_PPC_ADDR30:
3276 case R_PPC_EMB_RELSEC16:
3277 case R_PPC_EMB_RELST_LO:
3278 case R_PPC_EMB_RELST_HI:
3279 case R_PPC_EMB_RELST_HA:
3280 case R_PPC_EMB_BIT_FLD:
3281 break;
3282
3283 /* This refers only to functions defined in the shared library. */
3284 case R_PPC_LOCAL24PC:
3285 if (h && h == htab->elf.hgot)
3286 htab->old_plt = 1;
3287 break;
3288
3289 /* This relocation describes the C++ object vtable hierarchy.
3290 Reconstruct it for later use during GC. */
3291 case R_PPC_GNU_VTINHERIT:
3292 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3293 return FALSE;
3294 break;
3295
3296 /* This relocation describes which C++ vtable entries are actually
3297 used. Record for later use during GC. */
3298 case R_PPC_GNU_VTENTRY:
3299 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3300 return FALSE;
3301 break;
3302
3303 /* We shouldn't really be seeing these. */
3304 case R_PPC_TPREL32:
3305 if (info->shared)
3306 info->flags |= DF_STATIC_TLS;
3307 goto dodyn;
3308
3309 /* Nor these. */
3310 case R_PPC_DTPMOD32:
3311 case R_PPC_DTPREL32:
3312 goto dodyn;
3313
3314 case R_PPC_TPREL16:
3315 case R_PPC_TPREL16_LO:
3316 case R_PPC_TPREL16_HI:
3317 case R_PPC_TPREL16_HA:
3318 if (info->shared)
3319 info->flags |= DF_STATIC_TLS;
3320 goto dodyn;
3321
3322 case R_PPC_REL32:
3323 if (h == NULL
3324 && got2 != NULL
3325 && (sec->flags & SEC_CODE) != 0
3326 && (info->shared || info->pie)
3327 && !htab->old_plt)
3328 {
3329 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3330 the start of a function, which assembles to a REL32
3331 reference to .got2. If we detect one of these, then
3332 force the old PLT layout because the linker cannot
3333 reliably deduce the GOT pointer value needed for
3334 PLT call stubs. */
3335 asection *s;
3336
3337 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3338 r_symndx);
3339 if (s == got2)
3340 htab->old_plt = 1;
3341 }
3342 /* fall through */
3343
3344 case R_PPC_REL24:
3345 case R_PPC_REL14:
3346 case R_PPC_REL14_BRTAKEN:
3347 case R_PPC_REL14_BRNTAKEN:
3348 if (h == NULL)
3349 break;
3350 if (h == htab->elf.hgot)
3351 {
3352 htab->old_plt = 1;
3353 break;
3354 }
3355 /* fall through */
3356
3357 case R_PPC_ADDR32:
3358 case R_PPC_ADDR24:
3359 case R_PPC_ADDR16:
3360 case R_PPC_ADDR16_LO:
3361 case R_PPC_ADDR16_HI:
3362 case R_PPC_ADDR16_HA:
3363 case R_PPC_ADDR14:
3364 case R_PPC_ADDR14_BRTAKEN:
3365 case R_PPC_ADDR14_BRNTAKEN:
3366 case R_PPC_UADDR32:
3367 case R_PPC_UADDR16:
3368 if (h != NULL && !info->shared)
3369 {
3370 /* We may need a plt entry if the symbol turns out to be
3371 a function defined in a dynamic object. */
3372 if (!update_plt_info (abfd, h, NULL, 0))
3373 return FALSE;
3374
3375 /* We may need a copy reloc too. */
3376 h->non_got_ref = 1;
3377 }
3378
3379 dodyn:
3380 /* If we are creating a shared library, and this is a reloc
3381 against a global symbol, or a non PC relative reloc
3382 against a local symbol, then we need to copy the reloc
3383 into the shared library. However, if we are linking with
3384 -Bsymbolic, we do not need to copy a reloc against a
3385 global symbol which is defined in an object we are
3386 including in the link (i.e., DEF_REGULAR is set). At
3387 this point we have not seen all the input files, so it is
3388 possible that DEF_REGULAR is not set now but will be set
3389 later (it is never cleared). In case of a weak definition,
3390 DEF_REGULAR may be cleared later by a strong definition in
3391 a shared library. We account for that possibility below by
3392 storing information in the dyn_relocs field of the hash
3393 table entry. A similar situation occurs when creating
3394 shared libraries and symbol visibility changes render the
3395 symbol local.
3396
3397 If on the other hand, we are creating an executable, we
3398 may need to keep relocations for symbols satisfied by a
3399 dynamic library if we manage to avoid copy relocs for the
3400 symbol. */
3401 if ((info->shared
3402 && (MUST_BE_DYN_RELOC (r_type)
3403 || (h != NULL
3404 && (! info->symbolic
3405 || h->root.type == bfd_link_hash_defweak
3406 || !h->def_regular))))
3407 || (ELIMINATE_COPY_RELOCS
3408 && !info->shared
3409 && h != NULL
3410 && (h->root.type == bfd_link_hash_defweak
3411 || !h->def_regular)))
3412 {
3413 struct ppc_elf_dyn_relocs *p;
3414 struct ppc_elf_dyn_relocs **head;
3415
3416 #ifdef DEBUG
3417 fprintf (stderr,
3418 "ppc_elf_check_relocs needs to "
3419 "create relocation for %s\n",
3420 (h && h->root.root.string
3421 ? h->root.root.string : "<unknown>"));
3422 #endif
3423 if (sreloc == NULL)
3424 {
3425 const char *name;
3426
3427 name = (bfd_elf_string_from_elf_section
3428 (abfd,
3429 elf_elfheader (abfd)->e_shstrndx,
3430 elf_section_data (sec)->rel_hdr.sh_name));
3431 if (name == NULL)
3432 return FALSE;
3433
3434 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3435 && strcmp (bfd_get_section_name (abfd, sec),
3436 name + 5) == 0);
3437
3438 if (htab->elf.dynobj == NULL)
3439 htab->elf.dynobj = abfd;
3440 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3441 if (sreloc == NULL)
3442 {
3443 flagword flags;
3444
3445 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3446 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3447 | SEC_ALLOC | SEC_LOAD);
3448 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3449 name,
3450 flags);
3451 if (sreloc == NULL
3452 || ! bfd_set_section_alignment (htab->elf.dynobj,
3453 sreloc, 2))
3454 return FALSE;
3455 }
3456 elf_section_data (sec)->sreloc = sreloc;
3457 }
3458
3459 /* If this is a global symbol, we count the number of
3460 relocations we need for this symbol. */
3461 if (h != NULL)
3462 {
3463 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3464 }
3465 else
3466 {
3467 /* Track dynamic relocs needed for local syms too.
3468 We really need local syms available to do this
3469 easily. Oh well. */
3470
3471 asection *s;
3472 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3473 sec, r_symndx);
3474 if (s == NULL)
3475 return FALSE;
3476
3477 head = ((struct ppc_elf_dyn_relocs **)
3478 &elf_section_data (s)->local_dynrel);
3479 }
3480
3481 p = *head;
3482 if (p == NULL || p->sec != sec)
3483 {
3484 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3485 if (p == NULL)
3486 return FALSE;
3487 p->next = *head;
3488 *head = p;
3489 p->sec = sec;
3490 p->count = 0;
3491 p->pc_count = 0;
3492 }
3493
3494 p->count += 1;
3495 if (!MUST_BE_DYN_RELOC (r_type))
3496 p->pc_count += 1;
3497 }
3498
3499 break;
3500 }
3501 }
3502
3503 return TRUE;
3504 }
3505 \f
3506 /* Merge backend specific data from an object file to the output
3507 object file when linking. */
3508
3509 static bfd_boolean
3510 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3511 {
3512 flagword old_flags;
3513 flagword new_flags;
3514 bfd_boolean error;
3515
3516 if (!is_ppc_elf_target (ibfd->xvec)
3517 || !is_ppc_elf_target (obfd->xvec))
3518 return TRUE;
3519
3520 /* Check if we have the same endianess. */
3521 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3522 return FALSE;
3523
3524 new_flags = elf_elfheader (ibfd)->e_flags;
3525 old_flags = elf_elfheader (obfd)->e_flags;
3526 if (!elf_flags_init (obfd))
3527 {
3528 /* First call, no flags set. */
3529 elf_flags_init (obfd) = TRUE;
3530 elf_elfheader (obfd)->e_flags = new_flags;
3531 }
3532
3533 /* Compatible flags are ok. */
3534 else if (new_flags == old_flags)
3535 ;
3536
3537 /* Incompatible flags. */
3538 else
3539 {
3540 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3541 to be linked with either. */
3542 error = FALSE;
3543 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3544 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3545 {
3546 error = TRUE;
3547 (*_bfd_error_handler)
3548 (_("%B: compiled with -mrelocatable and linked with "
3549 "modules compiled normally"), ibfd);
3550 }
3551 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3552 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3553 {
3554 error = TRUE;
3555 (*_bfd_error_handler)
3556 (_("%B: compiled normally and linked with "
3557 "modules compiled with -mrelocatable"), ibfd);
3558 }
3559
3560 /* The output is -mrelocatable-lib iff both the input files are. */
3561 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3562 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3563
3564 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3565 but each input file is either -mrelocatable or -mrelocatable-lib. */
3566 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3567 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3568 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3569 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3570
3571 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3572 any module uses it. */
3573 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3574
3575 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3576 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3577
3578 /* Warn about any other mismatches. */
3579 if (new_flags != old_flags)
3580 {
3581 error = TRUE;
3582 (*_bfd_error_handler)
3583 (_("%B: uses different e_flags (0x%lx) fields "
3584 "than previous modules (0x%lx)"),
3585 ibfd, (long) new_flags, (long) old_flags);
3586 }
3587
3588 if (error)
3589 {
3590 bfd_set_error (bfd_error_bad_value);
3591 return FALSE;
3592 }
3593 }
3594
3595 return TRUE;
3596 }
3597 \f
3598 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3599 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3600 int
3601 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3602 struct bfd_link_info *info,
3603 int force_old_plt)
3604 {
3605 struct ppc_elf_link_hash_table *htab;
3606 flagword flags;
3607
3608 htab = ppc_elf_hash_table (info);
3609 if (force_old_plt || !htab->new_plt)
3610 htab->old_plt = 1;
3611
3612 if (htab->is_vxworks)
3613 {
3614 /* The VxWorks PLT is a loaded section with contents. */
3615 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED
3616 | SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3617
3618 if (htab->plt != NULL
3619 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3620 return -1;
3621 }
3622 else if (!htab->old_plt)
3623 {
3624 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3625 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3626
3627 /* The new PLT is a loaded section. */
3628 if (htab->plt != NULL
3629 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3630 return -1;
3631
3632 /* The new GOT is not executable. */
3633 if (htab->got != NULL
3634 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3635 return -1;
3636 }
3637 else
3638 {
3639 /* Stop an unused .glink section from affecting .text alignment. */
3640 if (htab->glink != NULL
3641 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3642 return -1;
3643 }
3644 return !htab->old_plt;
3645 }
3646 \f
3647 /* Return the section that should be marked against GC for a given
3648 relocation. */
3649
3650 static asection *
3651 ppc_elf_gc_mark_hook (asection *sec,
3652 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3653 Elf_Internal_Rela *rel,
3654 struct elf_link_hash_entry *h,
3655 Elf_Internal_Sym *sym)
3656 {
3657 if (h != NULL)
3658 {
3659 switch (ELF32_R_TYPE (rel->r_info))
3660 {
3661 case R_PPC_GNU_VTINHERIT:
3662 case R_PPC_GNU_VTENTRY:
3663 break;
3664
3665 default:
3666 switch (h->root.type)
3667 {
3668 case bfd_link_hash_defined:
3669 case bfd_link_hash_defweak:
3670 return h->root.u.def.section;
3671
3672 case bfd_link_hash_common:
3673 return h->root.u.c.p->section;
3674
3675 default:
3676 break;
3677 }
3678 }
3679 }
3680 else
3681 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3682
3683 return NULL;
3684 }
3685
3686 /* Update the got, plt and dynamic reloc reference counts for the
3687 section being removed. */
3688
3689 static bfd_boolean
3690 ppc_elf_gc_sweep_hook (bfd *abfd,
3691 struct bfd_link_info *info,
3692 asection *sec,
3693 const Elf_Internal_Rela *relocs)
3694 {
3695 struct ppc_elf_link_hash_table *htab;
3696 Elf_Internal_Shdr *symtab_hdr;
3697 struct elf_link_hash_entry **sym_hashes;
3698 bfd_signed_vma *local_got_refcounts;
3699 const Elf_Internal_Rela *rel, *relend;
3700 asection *got2;
3701
3702 if ((sec->flags & SEC_ALLOC) == 0)
3703 return TRUE;
3704
3705 elf_section_data (sec)->local_dynrel = NULL;
3706
3707 htab = ppc_elf_hash_table (info);
3708 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3709 sym_hashes = elf_sym_hashes (abfd);
3710 local_got_refcounts = elf_local_got_refcounts (abfd);
3711 got2 = bfd_get_section_by_name (abfd, ".got2");
3712
3713 relend = relocs + sec->reloc_count;
3714 for (rel = relocs; rel < relend; rel++)
3715 {
3716 unsigned long r_symndx;
3717 enum elf_ppc_reloc_type r_type;
3718 struct elf_link_hash_entry *h = NULL;
3719
3720 r_symndx = ELF32_R_SYM (rel->r_info);
3721 if (r_symndx >= symtab_hdr->sh_info)
3722 {
3723 struct ppc_elf_dyn_relocs **pp, *p;
3724 struct ppc_elf_link_hash_entry *eh;
3725
3726 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3727 while (h->root.type == bfd_link_hash_indirect
3728 || h->root.type == bfd_link_hash_warning)
3729 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3730 eh = (struct ppc_elf_link_hash_entry *) h;
3731
3732 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3733 if (p->sec == sec)
3734 {
3735 /* Everything must go for SEC. */
3736 *pp = p->next;
3737 break;
3738 }
3739 }
3740
3741 r_type = ELF32_R_TYPE (rel->r_info);
3742 switch (r_type)
3743 {
3744 case R_PPC_GOT_TLSLD16:
3745 case R_PPC_GOT_TLSLD16_LO:
3746 case R_PPC_GOT_TLSLD16_HI:
3747 case R_PPC_GOT_TLSLD16_HA:
3748 htab->tlsld_got.refcount -= 1;
3749 /* Fall thru */
3750
3751 case R_PPC_GOT_TLSGD16:
3752 case R_PPC_GOT_TLSGD16_LO:
3753 case R_PPC_GOT_TLSGD16_HI:
3754 case R_PPC_GOT_TLSGD16_HA:
3755 case R_PPC_GOT_TPREL16:
3756 case R_PPC_GOT_TPREL16_LO:
3757 case R_PPC_GOT_TPREL16_HI:
3758 case R_PPC_GOT_TPREL16_HA:
3759 case R_PPC_GOT_DTPREL16:
3760 case R_PPC_GOT_DTPREL16_LO:
3761 case R_PPC_GOT_DTPREL16_HI:
3762 case R_PPC_GOT_DTPREL16_HA:
3763 case R_PPC_GOT16:
3764 case R_PPC_GOT16_LO:
3765 case R_PPC_GOT16_HI:
3766 case R_PPC_GOT16_HA:
3767 if (h != NULL)
3768 {
3769 if (h->got.refcount > 0)
3770 h->got.refcount--;
3771 }
3772 else if (local_got_refcounts != NULL)
3773 {
3774 if (local_got_refcounts[r_symndx] > 0)
3775 local_got_refcounts[r_symndx]--;
3776 }
3777 break;
3778
3779 case R_PPC_REL24:
3780 case R_PPC_REL14:
3781 case R_PPC_REL14_BRTAKEN:
3782 case R_PPC_REL14_BRNTAKEN:
3783 case R_PPC_REL32:
3784 if (h == NULL || h == htab->elf.hgot)
3785 break;
3786 /* Fall thru */
3787
3788 case R_PPC_ADDR32:
3789 case R_PPC_ADDR24:
3790 case R_PPC_ADDR16:
3791 case R_PPC_ADDR16_LO:
3792 case R_PPC_ADDR16_HI:
3793 case R_PPC_ADDR16_HA:
3794 case R_PPC_ADDR14:
3795 case R_PPC_ADDR14_BRTAKEN:
3796 case R_PPC_ADDR14_BRNTAKEN:
3797 case R_PPC_UADDR32:
3798 case R_PPC_UADDR16:
3799 if (info->shared)
3800 break;
3801
3802 case R_PPC_PLT32:
3803 case R_PPC_PLTREL24:
3804 case R_PPC_PLTREL32:
3805 case R_PPC_PLT16_LO:
3806 case R_PPC_PLT16_HI:
3807 case R_PPC_PLT16_HA:
3808 if (h != NULL)
3809 {
3810 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3811 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3812 if (ent->plt.refcount > 0)
3813 ent->plt.refcount -= 1;
3814 }
3815 break;
3816
3817 default:
3818 break;
3819 }
3820 }
3821 return TRUE;
3822 }
3823 \f
3824 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3825
3826 asection *
3827 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3828 {
3829 struct ppc_elf_link_hash_table *htab;
3830
3831 htab = ppc_elf_hash_table (info);
3832 if (!htab->old_plt
3833 && htab->plt != NULL
3834 && htab->plt->output_section != NULL)
3835 {
3836 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3837 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3838 }
3839
3840 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3841 FALSE, FALSE, TRUE);
3842 return _bfd_elf_tls_setup (obfd, info);
3843 }
3844
3845 /* Run through all the TLS relocs looking for optimization
3846 opportunities. */
3847
3848 bfd_boolean
3849 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3850 struct bfd_link_info *info)
3851 {
3852 bfd *ibfd;
3853 asection *sec;
3854 struct ppc_elf_link_hash_table *htab;
3855
3856 if (info->relocatable || info->shared)
3857 return TRUE;
3858
3859 htab = ppc_elf_hash_table (info);
3860 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3861 {
3862 Elf_Internal_Sym *locsyms = NULL;
3863 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3864
3865 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3866 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3867 {
3868 Elf_Internal_Rela *relstart, *rel, *relend;
3869 int expecting_tls_get_addr;
3870
3871 /* Read the relocations. */
3872 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3873 info->keep_memory);
3874 if (relstart == NULL)
3875 return FALSE;
3876
3877 expecting_tls_get_addr = 0;
3878 relend = relstart + sec->reloc_count;
3879 for (rel = relstart; rel < relend; rel++)
3880 {
3881 enum elf_ppc_reloc_type r_type;
3882 unsigned long r_symndx;
3883 struct elf_link_hash_entry *h = NULL;
3884 char *tls_mask;
3885 char tls_set, tls_clear;
3886 bfd_boolean is_local;
3887
3888 r_symndx = ELF32_R_SYM (rel->r_info);
3889 if (r_symndx >= symtab_hdr->sh_info)
3890 {
3891 struct elf_link_hash_entry **sym_hashes;
3892
3893 sym_hashes = elf_sym_hashes (ibfd);
3894 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3895 while (h->root.type == bfd_link_hash_indirect
3896 || h->root.type == bfd_link_hash_warning)
3897 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3898 }
3899
3900 is_local = FALSE;
3901 if (h == NULL
3902 || !h->def_dynamic)
3903 is_local = TRUE;
3904
3905 r_type = ELF32_R_TYPE (rel->r_info);
3906 switch (r_type)
3907 {
3908 case R_PPC_GOT_TLSLD16:
3909 case R_PPC_GOT_TLSLD16_LO:
3910 case R_PPC_GOT_TLSLD16_HI:
3911 case R_PPC_GOT_TLSLD16_HA:
3912 /* These relocs should never be against a symbol
3913 defined in a shared lib. Leave them alone if
3914 that turns out to be the case. */
3915 expecting_tls_get_addr = 0;
3916 htab->tlsld_got.refcount -= 1;
3917 if (!is_local)
3918 continue;
3919
3920 /* LD -> LE */
3921 tls_set = 0;
3922 tls_clear = TLS_LD;
3923 expecting_tls_get_addr = 1;
3924 break;
3925
3926 case R_PPC_GOT_TLSGD16:
3927 case R_PPC_GOT_TLSGD16_LO:
3928 case R_PPC_GOT_TLSGD16_HI:
3929 case R_PPC_GOT_TLSGD16_HA:
3930 if (is_local)
3931 /* GD -> LE */
3932 tls_set = 0;
3933 else
3934 /* GD -> IE */
3935 tls_set = TLS_TLS | TLS_TPRELGD;
3936 tls_clear = TLS_GD;
3937 expecting_tls_get_addr = 1;
3938 break;
3939
3940 case R_PPC_GOT_TPREL16:
3941 case R_PPC_GOT_TPREL16_LO:
3942 case R_PPC_GOT_TPREL16_HI:
3943 case R_PPC_GOT_TPREL16_HA:
3944 expecting_tls_get_addr = 0;
3945 if (is_local)
3946 {
3947 /* IE -> LE */
3948 tls_set = 0;
3949 tls_clear = TLS_TPREL;
3950 break;
3951 }
3952 else
3953 continue;
3954
3955 case R_PPC_REL14:
3956 case R_PPC_REL14_BRTAKEN:
3957 case R_PPC_REL14_BRNTAKEN:
3958 case R_PPC_REL24:
3959 if (expecting_tls_get_addr
3960 && h != NULL
3961 && h == htab->tls_get_addr)
3962 {
3963 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3964 if (ent != NULL && ent->plt.refcount > 0)
3965 ent->plt.refcount -= 1;
3966 }
3967 expecting_tls_get_addr = 0;
3968 continue;
3969
3970 default:
3971 expecting_tls_get_addr = 0;
3972 continue;
3973 }
3974
3975 if (h != NULL)
3976 {
3977 if (tls_set == 0)
3978 {
3979 /* We managed to get rid of a got entry. */
3980 if (h->got.refcount > 0)
3981 h->got.refcount -= 1;
3982 }
3983 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3984 }
3985 else
3986 {
3987 Elf_Internal_Sym *sym;
3988 bfd_signed_vma *lgot_refs;
3989 char *lgot_masks;
3990
3991 if (locsyms == NULL)
3992 {
3993 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3994 if (locsyms == NULL)
3995 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3996 symtab_hdr->sh_info,
3997 0, NULL, NULL, NULL);
3998 if (locsyms == NULL)
3999 {
4000 if (elf_section_data (sec)->relocs != relstart)
4001 free (relstart);
4002 return FALSE;
4003 }
4004 }
4005 sym = locsyms + r_symndx;
4006 lgot_refs = elf_local_got_refcounts (ibfd);
4007 if (lgot_refs == NULL)
4008 abort ();
4009 if (tls_set == 0)
4010 {
4011 /* We managed to get rid of a got entry. */
4012 if (lgot_refs[r_symndx] > 0)
4013 lgot_refs[r_symndx] -= 1;
4014 }
4015 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4016 tls_mask = &lgot_masks[r_symndx];
4017 }
4018
4019 *tls_mask |= tls_set;
4020 *tls_mask &= ~tls_clear;
4021 }
4022
4023 if (elf_section_data (sec)->relocs != relstart)
4024 free (relstart);
4025 }
4026
4027 if (locsyms != NULL
4028 && (symtab_hdr->contents != (unsigned char *) locsyms))
4029 {
4030 if (!info->keep_memory)
4031 free (locsyms);
4032 else
4033 symtab_hdr->contents = (unsigned char *) locsyms;
4034 }
4035 }
4036 return TRUE;
4037 }
4038 \f
4039 /* Adjust a symbol defined by a dynamic object and referenced by a
4040 regular object. The current definition is in some section of the
4041 dynamic object, but we're not including those sections. We have to
4042 change the definition to something the rest of the link can
4043 understand. */
4044
4045 static bfd_boolean
4046 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4047 struct elf_link_hash_entry *h)
4048 {
4049 struct ppc_elf_link_hash_table *htab;
4050 asection *s;
4051 unsigned int power_of_two;
4052
4053 #ifdef DEBUG
4054 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4055 h->root.root.string);
4056 #endif
4057
4058 /* Make sure we know what is going on here. */
4059 htab = ppc_elf_hash_table (info);
4060 BFD_ASSERT (htab->elf.dynobj != NULL
4061 && (h->needs_plt
4062 || h->u.weakdef != NULL
4063 || (h->def_dynamic
4064 && h->ref_regular
4065 && !h->def_regular)));
4066
4067 /* Deal with function syms. */
4068 if (h->type == STT_FUNC
4069 || h->needs_plt)
4070 {
4071 /* Clear procedure linkage table information for any symbol that
4072 won't need a .plt entry. */
4073 struct plt_entry *ent;
4074 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4075 if (ent->plt.refcount > 0)
4076 break;
4077 if (ent == NULL
4078 || SYMBOL_CALLS_LOCAL (info, h)
4079 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4080 && h->root.type == bfd_link_hash_undefweak))
4081 {
4082 /* A PLT entry is not required/allowed when:
4083
4084 1. We are not using ld.so; because then the PLT entry
4085 can't be set up, so we can't use one. In this case,
4086 ppc_elf_adjust_dynamic_symbol won't even be called.
4087
4088 2. GC has rendered the entry unused.
4089
4090 3. We know for certain that a call to this symbol
4091 will go to this object, or will remain undefined. */
4092 h->plt.plist = NULL;
4093 h->needs_plt = 0;
4094 }
4095 return TRUE;
4096 }
4097 else
4098 h->plt.plist = NULL;
4099
4100 /* If this is a weak symbol, and there is a real definition, the
4101 processor independent code will have arranged for us to see the
4102 real definition first, and we can just use the same value. */
4103 if (h->u.weakdef != NULL)
4104 {
4105 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4106 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4107 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4108 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4109 if (ELIMINATE_COPY_RELOCS)
4110 h->non_got_ref = h->u.weakdef->non_got_ref;
4111 return TRUE;
4112 }
4113
4114 /* This is a reference to a symbol defined by a dynamic object which
4115 is not a function. */
4116
4117 /* If we are creating a shared library, we must presume that the
4118 only references to the symbol are via the global offset table.
4119 For such cases we need not do anything here; the relocations will
4120 be handled correctly by relocate_section. */
4121 if (info->shared)
4122 return TRUE;
4123
4124 /* If there are no references to this symbol that do not use the
4125 GOT, we don't need to generate a copy reloc. */
4126 if (!h->non_got_ref)
4127 return TRUE;
4128
4129 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4130 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4131 do this if there are any small data relocations. */
4132 if (ELIMINATE_COPY_RELOCS
4133 && !ppc_elf_hash_entry (h)->has_sda_refs)
4134 {
4135 struct ppc_elf_dyn_relocs *p;
4136 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4137 {
4138 s = p->sec->output_section;
4139 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4140 break;
4141 }
4142
4143 if (p == NULL)
4144 {
4145 h->non_got_ref = 0;
4146 return TRUE;
4147 }
4148 }
4149
4150 if (h->size == 0)
4151 {
4152 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4153 h->root.root.string);
4154 return TRUE;
4155 }
4156
4157 /* We must allocate the symbol in our .dynbss section, which will
4158 become part of the .bss section of the executable. There will be
4159 an entry for this symbol in the .dynsym section. The dynamic
4160 object will contain position independent code, so all references
4161 from the dynamic object to this symbol will go through the global
4162 offset table. The dynamic linker will use the .dynsym entry to
4163 determine the address it must put in the global offset table, so
4164 both the dynamic object and the regular object will refer to the
4165 same memory location for the variable.
4166
4167 Of course, if the symbol is referenced using SDAREL relocs, we
4168 must instead allocate it in .sbss. */
4169
4170 if (ppc_elf_hash_entry (h)->has_sda_refs)
4171 s = htab->dynsbss;
4172 else
4173 s = htab->dynbss;
4174 BFD_ASSERT (s != NULL);
4175
4176 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4177 copy the initial value out of the dynamic object and into the
4178 runtime process image. We need to remember the offset into the
4179 .rela.bss section we are going to use. */
4180 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4181 {
4182 asection *srel;
4183
4184 if (ppc_elf_hash_entry (h)->has_sda_refs)
4185 srel = htab->relsbss;
4186 else
4187 srel = htab->relbss;
4188 BFD_ASSERT (srel != NULL);
4189 srel->size += sizeof (Elf32_External_Rela);
4190 h->needs_copy = 1;
4191 }
4192
4193 /* We need to figure out the alignment required for this symbol. I
4194 have no idea how ELF linkers handle this. */
4195 power_of_two = bfd_log2 (h->size);
4196 if (power_of_two > 4)
4197 power_of_two = 4;
4198
4199 /* Apply the required alignment. */
4200 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4201 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4202 {
4203 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4204 return FALSE;
4205 }
4206
4207 /* Define the symbol as being at this point in the section. */
4208 h->root.u.def.section = s;
4209 h->root.u.def.value = s->size;
4210
4211 /* Increment the section size to make room for the symbol. */
4212 s->size += h->size;
4213
4214 return TRUE;
4215 }
4216 \f
4217 /* Allocate NEED contiguous space in .got, and return the offset.
4218 Handles allocation of the got header when crossing 32k. */
4219
4220 static bfd_vma
4221 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4222 {
4223 bfd_vma where;
4224 unsigned int max_before_header = 32768;
4225
4226 if (htab->old_plt)
4227 max_before_header = 32764;
4228
4229 if (htab->is_vxworks)
4230 {
4231 where = htab->got->size;
4232 htab->got->size += need;
4233 }
4234 else if (need <= htab->got_gap)
4235 {
4236 where = max_before_header - htab->got_gap;
4237 htab->got_gap -= need;
4238 }
4239 else
4240 {
4241 if (htab->got->size + need > max_before_header
4242 && htab->got->size <= max_before_header)
4243 {
4244 htab->got_gap = max_before_header - htab->got->size;
4245 htab->got->size = max_before_header + htab->got_header_size;
4246 }
4247 where = htab->got->size;
4248 htab->got->size += need;
4249 }
4250 return where;
4251 }
4252
4253 /* Allocate space in associated reloc sections for dynamic relocs. */
4254
4255 static bfd_boolean
4256 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4257 {
4258 struct bfd_link_info *info = inf;
4259 struct ppc_elf_link_hash_entry *eh;
4260 struct ppc_elf_link_hash_table *htab;
4261 struct ppc_elf_dyn_relocs *p;
4262
4263 if (h->root.type == bfd_link_hash_indirect)
4264 return TRUE;
4265
4266 if (h->root.type == bfd_link_hash_warning)
4267 /* When warning symbols are created, they **replace** the "real"
4268 entry in the hash table, thus we never get to see the real
4269 symbol in a hash traversal. So look at it now. */
4270 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4271
4272 htab = ppc_elf_hash_table (info);
4273 if (htab->elf.dynamic_sections_created)
4274 {
4275 struct plt_entry *ent;
4276 bfd_boolean doneone = FALSE;
4277 bfd_vma plt_offset = 0, glink_offset = 0;
4278
4279 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4280 if (ent->plt.refcount > 0)
4281 {
4282 /* Make sure this symbol is output as a dynamic symbol. */
4283 if (h->dynindx == -1
4284 && !h->forced_local)
4285 {
4286 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4287 return FALSE;
4288 }
4289
4290 if (info->shared
4291 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4292 {
4293 asection *s = htab->plt;
4294
4295 if (!(htab->old_plt || htab->is_vxworks))
4296 {
4297 if (!doneone)
4298 {
4299 plt_offset = s->size;
4300 s->size += 4;
4301 }
4302 ent->plt.offset = plt_offset;
4303
4304 s = htab->glink;
4305 if (!doneone || info->shared || info->pie)
4306 {
4307 glink_offset = s->size;
4308 s->size += GLINK_ENTRY_SIZE;
4309 }
4310 if (!doneone
4311 && !info->shared
4312 && !h->def_regular)
4313 {
4314 h->root.u.def.section = s;
4315 h->root.u.def.value = glink_offset;
4316 }
4317 ent->glink_offset = glink_offset;
4318 }
4319 else
4320 {
4321 if (!doneone)
4322 {
4323 /* If this is the first .plt entry, make room
4324 for the special first entry. */
4325 if (s->size == 0)
4326 s->size += htab->plt_initial_entry_size;
4327
4328 /* The PowerPC PLT is actually composed of two
4329 parts, the first part is 2 words (for a load
4330 and a jump), and then there is a remaining
4331 word available at the end. */
4332 plt_offset = (htab->plt_initial_entry_size
4333 + (htab->plt_slot_size
4334 * ((s->size
4335 - htab->plt_initial_entry_size)
4336 / htab->plt_entry_size)));
4337
4338 /* If this symbol is not defined in a regular
4339 file, and we are not generating a shared
4340 library, then set the symbol to this location
4341 in the .plt. This is required to make
4342 function pointers compare as equal between
4343 the normal executable and the shared library. */
4344 if (! info->shared
4345 && !h->def_regular)
4346 {
4347 h->root.u.def.section = s;
4348 h->root.u.def.value = plt_offset;
4349 }
4350
4351 /* Make room for this entry. */
4352 s->size += htab->plt_entry_size;
4353 /* After the 8192nd entry, room for two entries
4354 is allocated. */
4355 if (!htab->is_vxworks
4356 && (s->size - htab->plt_initial_entry_size)
4357 / htab->plt_entry_size
4358 > PLT_NUM_SINGLE_ENTRIES)
4359 s->size += htab->plt_entry_size;
4360 }
4361 ent->plt.offset = plt_offset;
4362 }
4363
4364 /* We also need to make an entry in the .rela.plt section. */
4365 if (!doneone)
4366 {
4367 htab->relplt->size += sizeof (Elf32_External_Rela);
4368
4369 if (htab->is_vxworks)
4370 {
4371 /* Allocate space for the unloaded relocations. */
4372 if (!info->shared)
4373 {
4374 if (ent->plt.offset
4375 == (bfd_vma) htab->plt_initial_entry_size)
4376 {
4377 htab->srelplt2->size
4378 += sizeof (Elf32_External_Rela)
4379 * VXWORKS_PLTRESOLVE_RELOCS;
4380 }
4381
4382 htab->srelplt2->size
4383 += sizeof (Elf32_External_Rela)
4384 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4385 }
4386
4387 /* Every PLT entry has an associated GOT entry in
4388 .got.plt. */
4389 htab->sgotplt->size += 4;
4390 }
4391 doneone = TRUE;
4392 }
4393 }
4394 else
4395 ent->plt.offset = (bfd_vma) -1;
4396
4397 if (!doneone)
4398 {
4399 h->plt.plist = NULL;
4400 h->needs_plt = 0;
4401 }
4402 }
4403 }
4404 else
4405 {
4406 h->plt.plist = NULL;
4407 h->needs_plt = 0;
4408 }
4409
4410 eh = (struct ppc_elf_link_hash_entry *) h;
4411 if (eh->elf.got.refcount > 0)
4412 {
4413 /* Make sure this symbol is output as a dynamic symbol. */
4414 if (eh->elf.dynindx == -1
4415 && !eh->elf.forced_local)
4416 {
4417 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4418 return FALSE;
4419 }
4420
4421 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4422 && !eh->elf.def_dynamic)
4423 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4424 eh->elf.got.offset = (bfd_vma) -1;
4425 else
4426 {
4427 bfd_boolean dyn;
4428 unsigned int need = 0;
4429 if ((eh->tls_mask & TLS_TLS) != 0)
4430 {
4431 if ((eh->tls_mask & TLS_LD) != 0)
4432 need += 8;
4433 if ((eh->tls_mask & TLS_GD) != 0)
4434 need += 8;
4435 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4436 need += 4;
4437 if ((eh->tls_mask & TLS_DTPREL) != 0)
4438 need += 4;
4439 }
4440 else
4441 need += 4;
4442 eh->elf.got.offset = allocate_got (htab, need);
4443 dyn = htab->elf.dynamic_sections_created;
4444 if ((info->shared
4445 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4446 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4447 || eh->elf.root.type != bfd_link_hash_undefweak))
4448 {
4449 /* All the entries we allocated need relocs.
4450 Except LD only needs one. */
4451 if ((eh->tls_mask & TLS_LD) != 0)
4452 need -= 4;
4453 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4454 }
4455 }
4456 }
4457 else
4458 eh->elf.got.offset = (bfd_vma) -1;
4459
4460 if (eh->dyn_relocs == NULL)
4461 return TRUE;
4462
4463 /* In the shared -Bsymbolic case, discard space allocated for
4464 dynamic pc-relative relocs against symbols which turn out to be
4465 defined in regular objects. For the normal shared case, discard
4466 space for relocs that have become local due to symbol visibility
4467 changes. */
4468
4469 if (info->shared)
4470 {
4471 /* Relocs that use pc_count are those that appear on a call insn,
4472 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4473 generated via assembly. We want calls to protected symbols to
4474 resolve directly to the function rather than going via the plt.
4475 If people want function pointer comparisons to work as expected
4476 then they should avoid writing weird assembly. */
4477 if (SYMBOL_CALLS_LOCAL (info, h))
4478 {
4479 struct ppc_elf_dyn_relocs **pp;
4480
4481 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4482 {
4483 p->count -= p->pc_count;
4484 p->pc_count = 0;
4485 if (p->count == 0)
4486 *pp = p->next;
4487 else
4488 pp = &p->next;
4489 }
4490 }
4491
4492 /* Also discard relocs on undefined weak syms with non-default
4493 visibility. */
4494 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4495 && h->root.type == bfd_link_hash_undefweak)
4496 eh->dyn_relocs = NULL;
4497
4498 /* Make sure undefined weak symbols are output as a dynamic symbol
4499 in PIEs. */
4500 if (info->pie
4501 && eh->dyn_relocs != NULL
4502 && h->dynindx == -1
4503 && h->root.type == bfd_link_hash_undefweak
4504 && !h->forced_local)
4505 {
4506 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4507 return FALSE;
4508 }
4509 }
4510 else if (ELIMINATE_COPY_RELOCS)
4511 {
4512 /* For the non-shared case, discard space for relocs against
4513 symbols which turn out to need copy relocs or are not
4514 dynamic. */
4515
4516 if (!h->non_got_ref
4517 && h->def_dynamic
4518 && !h->def_regular)
4519 {
4520 /* Make sure this symbol is output as a dynamic symbol.
4521 Undefined weak syms won't yet be marked as dynamic. */
4522 if (h->dynindx == -1
4523 && !h->forced_local)
4524 {
4525 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4526 return FALSE;
4527 }
4528
4529 /* If that succeeded, we know we'll be keeping all the
4530 relocs. */
4531 if (h->dynindx != -1)
4532 goto keep;
4533 }
4534
4535 eh->dyn_relocs = NULL;
4536
4537 keep: ;
4538 }
4539
4540 /* Finally, allocate space. */
4541 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4542 {
4543 asection *sreloc = elf_section_data (p->sec)->sreloc;
4544 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4545 }
4546
4547 return TRUE;
4548 }
4549
4550 /* Find any dynamic relocs that apply to read-only sections. */
4551
4552 static bfd_boolean
4553 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4554 {
4555 struct ppc_elf_dyn_relocs *p;
4556
4557 if (h->root.type == bfd_link_hash_indirect)
4558 return TRUE;
4559
4560 if (h->root.type == bfd_link_hash_warning)
4561 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4562
4563 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4564 {
4565 asection *s = p->sec->output_section;
4566
4567 if (s != NULL
4568 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4569 == (SEC_READONLY | SEC_ALLOC)))
4570 {
4571 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4572
4573 /* Not an error, just cut short the traversal. */
4574 return FALSE;
4575 }
4576 }
4577 return TRUE;
4578 }
4579
4580 /* Set the sizes of the dynamic sections. */
4581
4582 static bfd_boolean
4583 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4584 struct bfd_link_info *info)
4585 {
4586 struct ppc_elf_link_hash_table *htab;
4587 asection *s;
4588 bfd_boolean relocs;
4589 bfd *ibfd;
4590
4591 #ifdef DEBUG
4592 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4593 #endif
4594
4595 htab = ppc_elf_hash_table (info);
4596 BFD_ASSERT (htab->elf.dynobj != NULL);
4597
4598 if (elf_hash_table (info)->dynamic_sections_created)
4599 {
4600 /* Set the contents of the .interp section to the interpreter. */
4601 if (info->executable)
4602 {
4603 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4604 BFD_ASSERT (s != NULL);
4605 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4606 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4607 }
4608 }
4609
4610 if (htab->old_plt)
4611 htab->got_header_size = 16;
4612 else
4613 htab->got_header_size = 12;
4614
4615 /* Set up .got offsets for local syms, and space for local dynamic
4616 relocs. */
4617 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4618 {
4619 bfd_signed_vma *local_got;
4620 bfd_signed_vma *end_local_got;
4621 char *lgot_masks;
4622 bfd_size_type locsymcount;
4623 Elf_Internal_Shdr *symtab_hdr;
4624
4625 if (!is_ppc_elf_target (ibfd->xvec))
4626 continue;
4627
4628 for (s = ibfd->sections; s != NULL; s = s->next)
4629 {
4630 struct ppc_elf_dyn_relocs *p;
4631
4632 for (p = ((struct ppc_elf_dyn_relocs *)
4633 elf_section_data (s)->local_dynrel);
4634 p != NULL;
4635 p = p->next)
4636 {
4637 if (!bfd_is_abs_section (p->sec)
4638 && bfd_is_abs_section (p->sec->output_section))
4639 {
4640 /* Input section has been discarded, either because
4641 it is a copy of a linkonce section or due to
4642 linker script /DISCARD/, so we'll be discarding
4643 the relocs too. */
4644 }
4645 else if (p->count != 0)
4646 {
4647 elf_section_data (p->sec)->sreloc->size
4648 += p->count * sizeof (Elf32_External_Rela);
4649 if ((p->sec->output_section->flags
4650 & (SEC_READONLY | SEC_ALLOC))
4651 == (SEC_READONLY | SEC_ALLOC))
4652 info->flags |= DF_TEXTREL;
4653 }
4654 }
4655 }
4656
4657 local_got = elf_local_got_refcounts (ibfd);
4658 if (!local_got)
4659 continue;
4660
4661 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4662 locsymcount = symtab_hdr->sh_info;
4663 end_local_got = local_got + locsymcount;
4664 lgot_masks = (char *) end_local_got;
4665 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4666 if (*local_got > 0)
4667 {
4668 if (*lgot_masks == (TLS_TLS | TLS_LD))
4669 {
4670 /* If just an LD reloc, we'll just use
4671 htab->tlsld_got.offset. */
4672 htab->tlsld_got.refcount += 1;
4673 *local_got = (bfd_vma) -1;
4674 }
4675 else
4676 {
4677 unsigned int need = 0;
4678 if ((*lgot_masks & TLS_TLS) != 0)
4679 {
4680 if ((*lgot_masks & TLS_GD) != 0)
4681 need += 8;
4682 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4683 need += 4;
4684 if ((*lgot_masks & TLS_DTPREL) != 0)
4685 need += 4;
4686 }
4687 else
4688 need += 4;
4689 *local_got = allocate_got (htab, need);
4690 if (info->shared)
4691 htab->relgot->size += (need
4692 * (sizeof (Elf32_External_Rela) / 4));
4693 }
4694 }
4695 else
4696 *local_got = (bfd_vma) -1;
4697 }
4698
4699 if (htab->tlsld_got.refcount > 0)
4700 {
4701 htab->tlsld_got.offset = allocate_got (htab, 8);
4702 if (info->shared)
4703 htab->relgot->size += sizeof (Elf32_External_Rela);
4704 }
4705 else
4706 htab->tlsld_got.offset = (bfd_vma) -1;
4707
4708 if (htab->is_vxworks)
4709 {
4710 /* Save the PLT symbol in the hash table for easy access.
4711 Mark GOT and PLT syms as having relocations; they might not,
4712 but we won't know for sure until we build the GOT in
4713 finish_dynamic_symbol. */
4714
4715 if (htab->elf.hgot)
4716 htab->elf.hgot->indx = -2;
4717 htab->hplt = elf_link_hash_lookup (elf_hash_table (info),
4718 "_PROCEDURE_LINKAGE_TABLE_",
4719 FALSE, FALSE, FALSE);
4720 if (htab->hplt)
4721 htab->hplt->indx = -2;
4722 /* If the PLT is executable then give the symbol function type. */
4723 if (htab->hplt && htab->plt->flags & SEC_CODE)
4724 htab->hplt->type = STT_FUNC;
4725 }
4726
4727 /* Allocate space for global sym dynamic relocs. */
4728 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4729
4730 if (htab->got != NULL && !htab->is_vxworks)
4731 {
4732 unsigned int g_o_t = 32768;
4733
4734 /* If we haven't allocated the header, do so now. When we get here,
4735 for old plt/got the got size will be 0 to 32764 (not allocated),
4736 or 32780 to 65536 (header allocated). For new plt/got, the
4737 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4738 if (htab->got->size <= 32768)
4739 {
4740 g_o_t = htab->got->size;
4741 if (htab->old_plt)
4742 g_o_t += 4;
4743 htab->got->size += htab->got_header_size;
4744 }
4745
4746 htab->elf.hgot->root.u.def.value = g_o_t;
4747 }
4748
4749 if (htab->glink != NULL && htab->glink->size != 0)
4750 {
4751 htab->glink_pltresolve = htab->glink->size;
4752 /* Space for the branch table. */
4753 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4754 /* Pad out to align the start of PLTresolve. */
4755 htab->glink->size += -htab->glink->size & 15;
4756 htab->glink->size += GLINK_PLTRESOLVE;
4757 }
4758
4759 /* We've now determined the sizes of the various dynamic sections.
4760 Allocate memory for them. */
4761 relocs = FALSE;
4762 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4763 {
4764 bfd_boolean strip_section = TRUE;
4765
4766 if ((s->flags & SEC_LINKER_CREATED) == 0)
4767 continue;
4768
4769 if (s == htab->plt
4770 || s == htab->glink
4771 || s == htab->got
4772 || s == htab->sgotplt
4773 || s == htab->sbss
4774 || s == htab->dynbss
4775 || s == htab->dynsbss)
4776 {
4777 /* We'd like to strip these sections if they aren't needed, but if
4778 we've exported dynamic symbols from them we must leave them.
4779 It's too late to tell BFD to get rid of the symbols. */
4780 if ((s == htab->plt || s == htab->got) && htab->hplt != NULL)
4781 strip_section = FALSE;
4782 /* Strip this section if we don't need it; see the
4783 comment below. */
4784 }
4785 else if (s == htab->sdata[0].section
4786 || s == htab->sdata[1].section)
4787 {
4788 /* Strip these too. */
4789 }
4790 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4791 {
4792 if (s->size != 0)
4793 {
4794 /* Remember whether there are any relocation sections. */
4795 relocs = TRUE;
4796
4797 /* We use the reloc_count field as a counter if we need
4798 to copy relocs into the output file. */
4799 s->reloc_count = 0;
4800 }
4801 }
4802 else
4803 {
4804 /* It's not one of our sections, so don't allocate space. */
4805 continue;
4806 }
4807
4808 if (s->size == 0 && strip_section)
4809 {
4810 /* If we don't need this section, strip it from the
4811 output file. This is mostly to handle .rela.bss and
4812 .rela.plt. We must create both sections in
4813 create_dynamic_sections, because they must be created
4814 before the linker maps input sections to output
4815 sections. The linker does that before
4816 adjust_dynamic_symbol is called, and it is that
4817 function which decides whether anything needs to go
4818 into these sections. */
4819 s->flags |= SEC_EXCLUDE;
4820 continue;
4821 }
4822
4823 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4824 continue;
4825
4826 /* Allocate memory for the section contents. */
4827 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4828 if (s->contents == NULL)
4829 return FALSE;
4830 }
4831
4832 if (htab->elf.dynamic_sections_created)
4833 {
4834 /* Add some entries to the .dynamic section. We fill in the
4835 values later, in ppc_elf_finish_dynamic_sections, but we
4836 must add the entries now so that we get the correct size for
4837 the .dynamic section. The DT_DEBUG entry is filled in by the
4838 dynamic linker and used by the debugger. */
4839 #define add_dynamic_entry(TAG, VAL) \
4840 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4841
4842 if (info->executable)
4843 {
4844 if (!add_dynamic_entry (DT_DEBUG, 0))
4845 return FALSE;
4846 }
4847
4848 if (htab->plt != NULL && htab->plt->size != 0)
4849 {
4850 if (!add_dynamic_entry (DT_PLTGOT, 0)
4851 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4852 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4853 || !add_dynamic_entry (DT_JMPREL, 0))
4854 return FALSE;
4855 }
4856
4857 if (htab->glink != NULL && htab->glink->size != 0)
4858 {
4859 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4860 return FALSE;
4861 }
4862
4863 if (relocs)
4864 {
4865 if (!add_dynamic_entry (DT_RELA, 0)
4866 || !add_dynamic_entry (DT_RELASZ, 0)
4867 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4868 return FALSE;
4869 }
4870
4871 /* If any dynamic relocs apply to a read-only section, then we
4872 need a DT_TEXTREL entry. */
4873 if ((info->flags & DF_TEXTREL) == 0)
4874 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4875 info);
4876
4877 if ((info->flags & DF_TEXTREL) != 0)
4878 {
4879 if (!add_dynamic_entry (DT_TEXTREL, 0))
4880 return FALSE;
4881 }
4882 }
4883 #undef add_dynamic_entry
4884
4885 return TRUE;
4886 }
4887 \f
4888 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4889
4890 static const int shared_stub_entry[] =
4891 {
4892 0x7c0802a6, /* mflr 0 */
4893 0x429f0005, /* bcl 20, 31, .Lxxx */
4894 0x7d6802a6, /* mflr 11 */
4895 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4896 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4897 0x7c0803a6, /* mtlr 0 */
4898 0x7d6903a6, /* mtctr 11 */
4899 0x4e800420, /* bctr */
4900 };
4901
4902 static const int stub_entry[] =
4903 {
4904 0x3d600000, /* lis 11,xxx@ha */
4905 0x396b0000, /* addi 11,11,xxx@l */
4906 0x7d6903a6, /* mtctr 11 */
4907 0x4e800420, /* bctr */
4908 };
4909
4910 static bfd_boolean
4911 ppc_elf_relax_section (bfd *abfd,
4912 asection *isec,
4913 struct bfd_link_info *link_info,
4914 bfd_boolean *again)
4915 {
4916 struct one_fixup
4917 {
4918 struct one_fixup *next;
4919 asection *tsec;
4920 bfd_vma toff;
4921 bfd_vma trampoff;
4922 };
4923
4924 Elf_Internal_Shdr *symtab_hdr;
4925 bfd_byte *contents = NULL;
4926 Elf_Internal_Sym *isymbuf = NULL;
4927 Elf_Internal_Rela *internal_relocs = NULL;
4928 Elf_Internal_Rela *irel, *irelend;
4929 struct one_fixup *fixups = NULL;
4930 bfd_boolean changed;
4931 struct ppc_elf_link_hash_table *htab;
4932 bfd_size_type trampoff;
4933 asection *got2;
4934
4935 *again = FALSE;
4936
4937 /* Nothing to do if there are no relocations, and no need to do
4938 anything with non-alloc sections. */
4939 if ((isec->flags & SEC_ALLOC) == 0
4940 || (isec->flags & SEC_RELOC) == 0
4941 || isec->reloc_count == 0)
4942 return TRUE;
4943
4944 trampoff = (isec->size + 3) & (bfd_vma) -4;
4945 /* Space for a branch around any trampolines. */
4946 trampoff += 4;
4947
4948 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4949
4950 /* Get a copy of the native relocations. */
4951 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
4952 link_info->keep_memory);
4953 if (internal_relocs == NULL)
4954 goto error_return;
4955
4956 htab = ppc_elf_hash_table (link_info);
4957 got2 = bfd_get_section_by_name (abfd, ".got2");
4958
4959 irelend = internal_relocs + isec->reloc_count;
4960 for (irel = internal_relocs; irel < irelend; irel++)
4961 {
4962 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
4963 bfd_vma symaddr, reladdr, toff, roff;
4964 asection *tsec;
4965 struct one_fixup *f;
4966 size_t insn_offset = 0;
4967 bfd_vma max_branch_offset, val;
4968 bfd_byte *hit_addr;
4969 unsigned long t0;
4970 unsigned char sym_type;
4971
4972 switch (r_type)
4973 {
4974 case R_PPC_REL24:
4975 case R_PPC_LOCAL24PC:
4976 case R_PPC_PLTREL24:
4977 max_branch_offset = 1 << 25;
4978 break;
4979
4980 case R_PPC_REL14:
4981 case R_PPC_REL14_BRTAKEN:
4982 case R_PPC_REL14_BRNTAKEN:
4983 max_branch_offset = 1 << 15;
4984 break;
4985
4986 default:
4987 continue;
4988 }
4989
4990 /* Get the value of the symbol referred to by the reloc. */
4991 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4992 {
4993 /* A local symbol. */
4994 Elf_Internal_Sym *isym;
4995
4996 /* Read this BFD's local symbols. */
4997 if (isymbuf == NULL)
4998 {
4999 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5000 if (isymbuf == NULL)
5001 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5002 symtab_hdr->sh_info, 0,
5003 NULL, NULL, NULL);
5004 if (isymbuf == 0)
5005 goto error_return;
5006 }
5007 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5008 if (isym->st_shndx == SHN_UNDEF)
5009 continue; /* We can't do anything with undefined symbols. */
5010 else if (isym->st_shndx == SHN_ABS)
5011 tsec = bfd_abs_section_ptr;
5012 else if (isym->st_shndx == SHN_COMMON)
5013 tsec = bfd_com_section_ptr;
5014 else
5015 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5016
5017 toff = isym->st_value;
5018 sym_type = ELF_ST_TYPE (isym->st_info);
5019 }
5020 else
5021 {
5022 /* Global symbol handling. */
5023 unsigned long indx;
5024 struct elf_link_hash_entry *h;
5025
5026 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5027 h = elf_sym_hashes (abfd)[indx];
5028
5029 while (h->root.type == bfd_link_hash_indirect
5030 || h->root.type == bfd_link_hash_warning)
5031 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5032
5033 tsec = NULL;
5034 toff = 0;
5035 if (r_type == R_PPC_PLTREL24
5036 && htab->plt != NULL)
5037 {
5038 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5039
5040 if (ent != NULL)
5041 {
5042 if (!htab->old_plt)
5043 {
5044 tsec = htab->glink;
5045 toff = ent->glink_offset;
5046 }
5047 else
5048 {
5049 tsec = htab->plt;
5050 toff = ent->plt.offset;
5051 }
5052 }
5053 }
5054 if (tsec != NULL)
5055 ;
5056 else if (h->root.type == bfd_link_hash_defined
5057 || h->root.type == bfd_link_hash_defweak)
5058 {
5059 tsec = h->root.u.def.section;
5060 toff = h->root.u.def.value;
5061 }
5062 else
5063 continue;
5064
5065 sym_type = h->type;
5066 }
5067
5068 /* If the branch and target are in the same section, you have
5069 no hope of adding stubs. We'll error out later should the
5070 branch overflow. */
5071 if (tsec == isec)
5072 continue;
5073
5074 /* There probably isn't any reason to handle symbols in
5075 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5076 attribute for a code section, and we are only looking at
5077 branches. However, implement it correctly here as a
5078 reference for other target relax_section functions. */
5079 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5080 {
5081 /* At this stage in linking, no SEC_MERGE symbol has been
5082 adjusted, so all references to such symbols need to be
5083 passed through _bfd_merged_section_offset. (Later, in
5084 relocate_section, all SEC_MERGE symbols *except* for
5085 section symbols have been adjusted.)
5086
5087 gas may reduce relocations against symbols in SEC_MERGE
5088 sections to a relocation against the section symbol when
5089 the original addend was zero. When the reloc is against
5090 a section symbol we should include the addend in the
5091 offset passed to _bfd_merged_section_offset, since the
5092 location of interest is the original symbol. On the
5093 other hand, an access to "sym+addend" where "sym" is not
5094 a section symbol should not include the addend; Such an
5095 access is presumed to be an offset from "sym"; The
5096 location of interest is just "sym". */
5097 if (sym_type == STT_SECTION)
5098 toff += irel->r_addend;
5099
5100 toff = _bfd_merged_section_offset (abfd, &tsec,
5101 elf_section_data (tsec)->sec_info,
5102 toff);
5103
5104 if (sym_type != STT_SECTION)
5105 toff += irel->r_addend;
5106 }
5107 /* PLTREL24 addends are special. */
5108 else if (r_type != R_PPC_PLTREL24)
5109 toff += irel->r_addend;
5110
5111 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5112
5113 roff = irel->r_offset;
5114 reladdr = isec->output_section->vma + isec->output_offset + roff;
5115
5116 /* If the branch is in range, no need to do anything. */
5117 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5118 continue;
5119
5120 /* Look for an existing fixup to this address. */
5121 for (f = fixups; f ; f = f->next)
5122 if (f->tsec == tsec && f->toff == toff)
5123 break;
5124
5125 if (f == NULL)
5126 {
5127 size_t size;
5128 unsigned long stub_rtype;
5129
5130 val = trampoff - roff;
5131 if (val >= max_branch_offset)
5132 /* Oh dear, we can't reach a trampoline. Don't try to add
5133 one. We'll report an error later. */
5134 continue;
5135
5136 if (link_info->shared)
5137 {
5138 size = 4 * ARRAY_SIZE (shared_stub_entry);
5139 insn_offset = 12;
5140 stub_rtype = R_PPC_RELAX32PC;
5141 }
5142 else
5143 {
5144 size = 4 * ARRAY_SIZE (stub_entry);
5145 insn_offset = 0;
5146 stub_rtype = R_PPC_RELAX32;
5147 }
5148
5149 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5150 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5151 abort ();
5152 if (tsec == htab->plt
5153 || tsec == htab->glink)
5154 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5155
5156 /* Hijack the old relocation. Since we need two
5157 relocations for this use a "composite" reloc. */
5158 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5159 stub_rtype);
5160 irel->r_offset = trampoff + insn_offset;
5161
5162 /* Record the fixup so we don't do it again this section. */
5163 f = bfd_malloc (sizeof (*f));
5164 f->next = fixups;
5165 f->tsec = tsec;
5166 f->toff = toff;
5167 f->trampoff = trampoff;
5168 fixups = f;
5169
5170 trampoff += size;
5171 }
5172 else
5173 {
5174 val = f->trampoff - roff;
5175 if (val >= max_branch_offset)
5176 continue;
5177
5178 /* Nop out the reloc, since we're finalizing things here. */
5179 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5180 }
5181
5182 /* Get the section contents. */
5183 if (contents == NULL)
5184 {
5185 /* Get cached copy if it exists. */
5186 if (elf_section_data (isec)->this_hdr.contents != NULL)
5187 contents = elf_section_data (isec)->this_hdr.contents;
5188 else
5189 {
5190 /* Go get them off disk. */
5191 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5192 goto error_return;
5193 }
5194 }
5195
5196 /* Fix up the existing branch to hit the trampoline. */
5197 hit_addr = contents + roff;
5198 switch (r_type)
5199 {
5200 case R_PPC_REL24:
5201 case R_PPC_LOCAL24PC:
5202 case R_PPC_PLTREL24:
5203 t0 = bfd_get_32 (abfd, hit_addr);
5204 t0 &= ~0x3fffffc;
5205 t0 |= val & 0x3fffffc;
5206 bfd_put_32 (abfd, t0, hit_addr);
5207 break;
5208
5209 case R_PPC_REL14:
5210 case R_PPC_REL14_BRTAKEN:
5211 case R_PPC_REL14_BRNTAKEN:
5212 t0 = bfd_get_32 (abfd, hit_addr);
5213 t0 &= ~0xfffc;
5214 t0 |= val & 0xfffc;
5215 bfd_put_32 (abfd, t0, hit_addr);
5216 break;
5217 }
5218 }
5219
5220 /* Write out the trampolines. */
5221 changed = fixups != NULL;
5222 if (fixups != NULL)
5223 {
5224 const int *stub;
5225 bfd_byte *dest;
5226 bfd_vma val;
5227 int i, size;
5228
5229 do
5230 {
5231 struct one_fixup *f = fixups;
5232 fixups = fixups->next;
5233 free (f);
5234 }
5235 while (fixups);
5236
5237 contents = bfd_realloc (contents, trampoff);
5238 if (contents == NULL)
5239 goto error_return;
5240
5241 isec->size = (isec->size + 3) & (bfd_vma) -4;
5242 /* Branch around the trampolines. */
5243 val = trampoff - isec->size + 0x48000000;
5244 dest = contents + isec->size;
5245 isec->size = trampoff;
5246 bfd_put_32 (abfd, val, dest);
5247 dest += 4;
5248
5249 if (link_info->shared)
5250 {
5251 stub = shared_stub_entry;
5252 size = ARRAY_SIZE (shared_stub_entry);
5253 }
5254 else
5255 {
5256 stub = stub_entry;
5257 size = ARRAY_SIZE (stub_entry);
5258 }
5259
5260 i = 0;
5261 while (dest < contents + trampoff)
5262 {
5263 bfd_put_32 (abfd, stub[i], dest);
5264 i++;
5265 if (i == size)
5266 i = 0;
5267 dest += 4;
5268 }
5269 BFD_ASSERT (i == 0);
5270 }
5271
5272 if (isymbuf != NULL
5273 && symtab_hdr->contents != (unsigned char *) isymbuf)
5274 {
5275 if (! link_info->keep_memory)
5276 free (isymbuf);
5277 else
5278 {
5279 /* Cache the symbols for elf_link_input_bfd. */
5280 symtab_hdr->contents = (unsigned char *) isymbuf;
5281 }
5282 }
5283
5284 if (contents != NULL
5285 && elf_section_data (isec)->this_hdr.contents != contents)
5286 {
5287 if (!changed && !link_info->keep_memory)
5288 free (contents);
5289 else
5290 {
5291 /* Cache the section contents for elf_link_input_bfd. */
5292 elf_section_data (isec)->this_hdr.contents = contents;
5293 }
5294 }
5295
5296 if (elf_section_data (isec)->relocs != internal_relocs)
5297 {
5298 if (!changed)
5299 free (internal_relocs);
5300 else
5301 elf_section_data (isec)->relocs = internal_relocs;
5302 }
5303
5304 *again = changed;
5305 return TRUE;
5306
5307 error_return:
5308 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5309 free (isymbuf);
5310 if (contents != NULL
5311 && elf_section_data (isec)->this_hdr.contents != contents)
5312 free (contents);
5313 if (internal_relocs != NULL
5314 && elf_section_data (isec)->relocs != internal_relocs)
5315 free (internal_relocs);
5316 return FALSE;
5317 }
5318 \f
5319 /* What to do when ld finds relocations against symbols defined in
5320 discarded sections. */
5321
5322 static unsigned int
5323 ppc_elf_action_discarded (asection *sec)
5324 {
5325 if (strcmp (".fixup", sec->name) == 0)
5326 return 0;
5327
5328 if (strcmp (".got2", sec->name) == 0)
5329 return 0;
5330
5331 return _bfd_elf_default_action_discarded (sec);
5332 }
5333 \f
5334 /* Fill in the address for a pointer generated in a linker section. */
5335
5336 static bfd_vma
5337 elf_finish_pointer_linker_section (bfd *input_bfd,
5338 elf_linker_section_t *lsect,
5339 struct elf_link_hash_entry *h,
5340 bfd_vma relocation,
5341 const Elf_Internal_Rela *rel)
5342 {
5343 elf_linker_section_pointers_t *linker_section_ptr;
5344
5345 BFD_ASSERT (lsect != NULL);
5346
5347 if (h != NULL)
5348 {
5349 /* Handle global symbol. */
5350 struct ppc_elf_link_hash_entry *eh;
5351
5352 eh = (struct ppc_elf_link_hash_entry *) h;
5353 BFD_ASSERT (eh->elf.def_regular);
5354 linker_section_ptr = eh->linker_section_pointer;
5355 }
5356 else
5357 {
5358 /* Handle local symbol. */
5359 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5360
5361 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5362 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5363 }
5364
5365 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5366 rel->r_addend,
5367 lsect);
5368 BFD_ASSERT (linker_section_ptr != NULL);
5369
5370 /* Offset will always be a multiple of four, so use the bottom bit
5371 as a "written" flag. */
5372 if ((linker_section_ptr->offset & 1) == 0)
5373 {
5374 bfd_put_32 (lsect->section->owner,
5375 relocation + linker_section_ptr->addend,
5376 lsect->section->contents + linker_section_ptr->offset);
5377 linker_section_ptr->offset += 1;
5378 }
5379
5380 relocation = (lsect->section->output_offset
5381 + linker_section_ptr->offset - 1
5382 - 0x8000);
5383
5384 #ifdef DEBUG
5385 fprintf (stderr,
5386 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5387 lsect->name, (long) relocation, (long) relocation);
5388 #endif
5389
5390 /* Subtract out the addend, because it will get added back in by the normal
5391 processing. */
5392 return relocation - linker_section_ptr->addend;
5393 }
5394
5395 /* The RELOCATE_SECTION function is called by the ELF backend linker
5396 to handle the relocations for a section.
5397
5398 The relocs are always passed as Rela structures; if the section
5399 actually uses Rel structures, the r_addend field will always be
5400 zero.
5401
5402 This function is responsible for adjust the section contents as
5403 necessary, and (if using Rela relocs and generating a
5404 relocatable output file) adjusting the reloc addend as
5405 necessary.
5406
5407 This function does not have to worry about setting the reloc
5408 address or the reloc symbol index.
5409
5410 LOCAL_SYMS is a pointer to the swapped in local symbols.
5411
5412 LOCAL_SECTIONS is an array giving the section in the input file
5413 corresponding to the st_shndx field of each local symbol.
5414
5415 The global hash table entry for the global symbols can be found
5416 via elf_sym_hashes (input_bfd).
5417
5418 When generating relocatable output, this function must handle
5419 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5420 going to be the section symbol corresponding to the output
5421 section, which means that the addend must be adjusted
5422 accordingly. */
5423
5424 static bfd_boolean
5425 ppc_elf_relocate_section (bfd *output_bfd,
5426 struct bfd_link_info *info,
5427 bfd *input_bfd,
5428 asection *input_section,
5429 bfd_byte *contents,
5430 Elf_Internal_Rela *relocs,
5431 Elf_Internal_Sym *local_syms,
5432 asection **local_sections)
5433 {
5434 Elf_Internal_Shdr *symtab_hdr;
5435 struct elf_link_hash_entry **sym_hashes;
5436 struct ppc_elf_link_hash_table *htab;
5437 Elf_Internal_Rela *rel;
5438 Elf_Internal_Rela *relend;
5439 Elf_Internal_Rela outrel;
5440 bfd_byte *loc;
5441 asection *got2, *sreloc = NULL;
5442 bfd_vma *local_got_offsets;
5443 bfd_boolean ret = TRUE;
5444
5445 #ifdef DEBUG
5446 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5447 "%ld relocations%s",
5448 input_bfd, input_section,
5449 (long) input_section->reloc_count,
5450 (info->relocatable) ? " (relocatable)" : "");
5451 #endif
5452
5453 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5454
5455 if (info->relocatable)
5456 {
5457 if (got2 == NULL)
5458 return TRUE;
5459
5460 rel = relocs;
5461 relend = relocs + input_section->reloc_count;
5462 for (; rel < relend; rel++)
5463 {
5464 enum elf_ppc_reloc_type r_type;
5465
5466 r_type = ELF32_R_TYPE (rel->r_info);
5467 if (r_type == R_PPC_PLTREL24
5468 && rel->r_addend >= 32768)
5469 {
5470 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5471 addend specifies the GOT pointer offset within .got2. */
5472 rel->r_addend += got2->output_offset;
5473 }
5474 }
5475 return TRUE;
5476 }
5477
5478 /* Initialize howto table if not already done. */
5479 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5480 ppc_elf_howto_init ();
5481
5482 htab = ppc_elf_hash_table (info);
5483 local_got_offsets = elf_local_got_offsets (input_bfd);
5484 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5485 sym_hashes = elf_sym_hashes (input_bfd);
5486 rel = relocs;
5487 relend = relocs + input_section->reloc_count;
5488 for (; rel < relend; rel++)
5489 {
5490 enum elf_ppc_reloc_type r_type;
5491 bfd_vma addend;
5492 bfd_reloc_status_type r;
5493 Elf_Internal_Sym *sym;
5494 asection *sec;
5495 struct elf_link_hash_entry *h;
5496 const char *sym_name;
5497 reloc_howto_type *howto;
5498 unsigned long r_symndx;
5499 bfd_vma relocation;
5500 bfd_vma branch_bit, insn, from;
5501 bfd_boolean unresolved_reloc;
5502 bfd_boolean warned;
5503 unsigned int tls_type, tls_mask, tls_gd;
5504
5505 r_type = ELF32_R_TYPE (rel->r_info);
5506 sym = NULL;
5507 sec = NULL;
5508 h = NULL;
5509 unresolved_reloc = FALSE;
5510 warned = FALSE;
5511 r_symndx = ELF32_R_SYM (rel->r_info);
5512
5513 if (r_symndx < symtab_hdr->sh_info)
5514 {
5515 sym = local_syms + r_symndx;
5516 sec = local_sections[r_symndx];
5517 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5518
5519 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5520 }
5521 else
5522 {
5523 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5524 r_symndx, symtab_hdr, sym_hashes,
5525 h, sec, relocation,
5526 unresolved_reloc, warned);
5527
5528 sym_name = h->root.root.string;
5529 }
5530
5531 /* TLS optimizations. Replace instruction sequences and relocs
5532 based on information we collected in tls_optimize. We edit
5533 RELOCS so that --emit-relocs will output something sensible
5534 for the final instruction stream. */
5535 tls_mask = 0;
5536 tls_gd = 0;
5537 if (IS_PPC_TLS_RELOC (r_type))
5538 {
5539 if (h != NULL)
5540 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5541 else if (local_got_offsets != NULL)
5542 {
5543 char *lgot_masks;
5544 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5545 tls_mask = lgot_masks[r_symndx];
5546 }
5547 }
5548
5549 /* Ensure reloc mapping code below stays sane. */
5550 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5551 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5552 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5553 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5554 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5555 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5556 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5557 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5558 abort ();
5559 switch (r_type)
5560 {
5561 default:
5562 break;
5563
5564 case R_PPC_GOT_TPREL16:
5565 case R_PPC_GOT_TPREL16_LO:
5566 if (tls_mask != 0
5567 && (tls_mask & TLS_TPREL) == 0)
5568 {
5569 bfd_vma insn;
5570 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5571 insn &= 31 << 21;
5572 insn |= 0x3c020000; /* addis 0,2,0 */
5573 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5574 r_type = R_PPC_TPREL16_HA;
5575 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5576 }
5577 break;
5578
5579 case R_PPC_TLS:
5580 if (tls_mask != 0
5581 && (tls_mask & TLS_TPREL) == 0)
5582 {
5583 bfd_vma insn, rtra;
5584 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5585 if ((insn & ((31 << 26) | (31 << 11)))
5586 == ((31 << 26) | (2 << 11)))
5587 rtra = insn & ((1 << 26) - (1 << 16));
5588 else if ((insn & ((31 << 26) | (31 << 16)))
5589 == ((31 << 26) | (2 << 16)))
5590 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5591 else
5592 abort ();
5593 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5594 /* add -> addi. */
5595 insn = 14 << 26;
5596 else if ((insn & (31 << 1)) == 23 << 1
5597 && ((insn & (31 << 6)) < 14 << 6
5598 || ((insn & (31 << 6)) >= 16 << 6
5599 && (insn & (31 << 6)) < 24 << 6)))
5600 /* load and store indexed -> dform. */
5601 insn = (32 | ((insn >> 6) & 31)) << 26;
5602 else if ((insn & (31 << 1)) == 21 << 1
5603 && (insn & (0x1a << 6)) == 0)
5604 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5605 insn = (((58 | ((insn >> 6) & 4)) << 26)
5606 | ((insn >> 6) & 1));
5607 else if ((insn & (31 << 1)) == 21 << 1
5608 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5609 /* lwax -> lwa. */
5610 insn = (58 << 26) | 2;
5611 else
5612 abort ();
5613 insn |= rtra;
5614 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5615 r_type = R_PPC_TPREL16_LO;
5616 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5617 /* Was PPC_TLS which sits on insn boundary, now
5618 PPC_TPREL16_LO which is at insn+2. */
5619 rel->r_offset += 2;
5620 }
5621 break;
5622
5623 case R_PPC_GOT_TLSGD16_HI:
5624 case R_PPC_GOT_TLSGD16_HA:
5625 tls_gd = TLS_TPRELGD;
5626 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5627 goto tls_gdld_hi;
5628 break;
5629
5630 case R_PPC_GOT_TLSLD16_HI:
5631 case R_PPC_GOT_TLSLD16_HA:
5632 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5633 {
5634 tls_gdld_hi:
5635 if ((tls_mask & tls_gd) != 0)
5636 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5637 + R_PPC_GOT_TPREL16);
5638 else
5639 {
5640 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5641 rel->r_offset -= 2;
5642 r_type = R_PPC_NONE;
5643 }
5644 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5645 }
5646 break;
5647
5648 case R_PPC_GOT_TLSGD16:
5649 case R_PPC_GOT_TLSGD16_LO:
5650 tls_gd = TLS_TPRELGD;
5651 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5652 goto tls_get_addr_check;
5653 break;
5654
5655 case R_PPC_GOT_TLSLD16:
5656 case R_PPC_GOT_TLSLD16_LO:
5657 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5658 {
5659 tls_get_addr_check:
5660 if (rel + 1 < relend)
5661 {
5662 enum elf_ppc_reloc_type r_type2;
5663 unsigned long r_symndx2;
5664 struct elf_link_hash_entry *h2;
5665 bfd_vma insn1, insn2;
5666 bfd_vma offset;
5667
5668 /* The next instruction should be a call to
5669 __tls_get_addr. Peek at the reloc to be sure. */
5670 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5671 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5672 if (r_symndx2 < symtab_hdr->sh_info
5673 || (r_type2 != R_PPC_REL14
5674 && r_type2 != R_PPC_REL14_BRTAKEN
5675 && r_type2 != R_PPC_REL14_BRNTAKEN
5676 && r_type2 != R_PPC_REL24
5677 && r_type2 != R_PPC_PLTREL24))
5678 break;
5679
5680 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5681 while (h2->root.type == bfd_link_hash_indirect
5682 || h2->root.type == bfd_link_hash_warning)
5683 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5684 if (h2 == NULL || h2 != htab->tls_get_addr)
5685 break;
5686
5687 /* OK, it checks out. Replace the call. */
5688 offset = rel[1].r_offset;
5689 insn1 = bfd_get_32 (output_bfd,
5690 contents + rel->r_offset - 2);
5691 if ((tls_mask & tls_gd) != 0)
5692 {
5693 /* IE */
5694 insn1 &= (1 << 26) - 1;
5695 insn1 |= 32 << 26; /* lwz */
5696 insn2 = 0x7c631214; /* add 3,3,2 */
5697 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5698 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5699 + R_PPC_GOT_TPREL16);
5700 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5701 }
5702 else
5703 {
5704 /* LE */
5705 insn1 = 0x3c620000; /* addis 3,2,0 */
5706 insn2 = 0x38630000; /* addi 3,3,0 */
5707 if (tls_gd == 0)
5708 {
5709 /* Was an LD reloc. */
5710 r_symndx = 0;
5711 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5712 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5713 }
5714 r_type = R_PPC_TPREL16_HA;
5715 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5716 rel[1].r_info = ELF32_R_INFO (r_symndx,
5717 R_PPC_TPREL16_LO);
5718 rel[1].r_offset += 2;
5719 }
5720 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5721 bfd_put_32 (output_bfd, insn2, contents + offset);
5722 if (tls_gd == 0)
5723 {
5724 /* We changed the symbol on an LD reloc. Start over
5725 in order to get h, sym, sec etc. right. */
5726 rel--;
5727 continue;
5728 }
5729 }
5730 }
5731 break;
5732 }
5733
5734 /* Handle other relocations that tweak non-addend part of insn. */
5735 branch_bit = 0;
5736 switch (r_type)
5737 {
5738 default:
5739 break;
5740
5741 /* Branch taken prediction relocations. */
5742 case R_PPC_ADDR14_BRTAKEN:
5743 case R_PPC_REL14_BRTAKEN:
5744 branch_bit = BRANCH_PREDICT_BIT;
5745 /* Fall thru */
5746
5747 /* Branch not taken prediction relocations. */
5748 case R_PPC_ADDR14_BRNTAKEN:
5749 case R_PPC_REL14_BRNTAKEN:
5750 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5751 insn &= ~BRANCH_PREDICT_BIT;
5752 insn |= branch_bit;
5753
5754 from = (rel->r_offset
5755 + input_section->output_offset
5756 + input_section->output_section->vma);
5757
5758 /* Invert 'y' bit if not the default. */
5759 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5760 insn ^= BRANCH_PREDICT_BIT;
5761
5762 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5763 break;
5764 }
5765
5766 addend = rel->r_addend;
5767 tls_type = 0;
5768 howto = NULL;
5769 if (r_type < R_PPC_max)
5770 howto = ppc_elf_howto_table[r_type];
5771 switch (r_type)
5772 {
5773 default:
5774 (*_bfd_error_handler)
5775 (_("%B: unknown relocation type %d for symbol %s"),
5776 input_bfd, (int) r_type, sym_name);
5777
5778 bfd_set_error (bfd_error_bad_value);
5779 ret = FALSE;
5780 continue;
5781
5782 case R_PPC_NONE:
5783 case R_PPC_TLS:
5784 case R_PPC_EMB_MRKREF:
5785 case R_PPC_GNU_VTINHERIT:
5786 case R_PPC_GNU_VTENTRY:
5787 continue;
5788
5789 /* GOT16 relocations. Like an ADDR16 using the symbol's
5790 address in the GOT as relocation value instead of the
5791 symbol's value itself. Also, create a GOT entry for the
5792 symbol and put the symbol value there. */
5793 case R_PPC_GOT_TLSGD16:
5794 case R_PPC_GOT_TLSGD16_LO:
5795 case R_PPC_GOT_TLSGD16_HI:
5796 case R_PPC_GOT_TLSGD16_HA:
5797 tls_type = TLS_TLS | TLS_GD;
5798 goto dogot;
5799
5800 case R_PPC_GOT_TLSLD16:
5801 case R_PPC_GOT_TLSLD16_LO:
5802 case R_PPC_GOT_TLSLD16_HI:
5803 case R_PPC_GOT_TLSLD16_HA:
5804 tls_type = TLS_TLS | TLS_LD;
5805 goto dogot;
5806
5807 case R_PPC_GOT_TPREL16:
5808 case R_PPC_GOT_TPREL16_LO:
5809 case R_PPC_GOT_TPREL16_HI:
5810 case R_PPC_GOT_TPREL16_HA:
5811 tls_type = TLS_TLS | TLS_TPREL;
5812 goto dogot;
5813
5814 case R_PPC_GOT_DTPREL16:
5815 case R_PPC_GOT_DTPREL16_LO:
5816 case R_PPC_GOT_DTPREL16_HI:
5817 case R_PPC_GOT_DTPREL16_HA:
5818 tls_type = TLS_TLS | TLS_DTPREL;
5819 goto dogot;
5820
5821 case R_PPC_GOT16:
5822 case R_PPC_GOT16_LO:
5823 case R_PPC_GOT16_HI:
5824 case R_PPC_GOT16_HA:
5825 dogot:
5826 {
5827 /* Relocation is to the entry for this symbol in the global
5828 offset table. */
5829 bfd_vma off;
5830 bfd_vma *offp;
5831 unsigned long indx;
5832
5833 if (htab->got == NULL)
5834 abort ();
5835
5836 indx = 0;
5837 if (tls_type == (TLS_TLS | TLS_LD)
5838 && (h == NULL
5839 || !h->def_dynamic))
5840 offp = &htab->tlsld_got.offset;
5841 else if (h != NULL)
5842 {
5843 bfd_boolean dyn;
5844 dyn = htab->elf.dynamic_sections_created;
5845 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5846 || (info->shared
5847 && SYMBOL_REFERENCES_LOCAL (info, h)))
5848 /* This is actually a static link, or it is a
5849 -Bsymbolic link and the symbol is defined
5850 locally, or the symbol was forced to be local
5851 because of a version file. */
5852 ;
5853 else
5854 {
5855 indx = h->dynindx;
5856 unresolved_reloc = FALSE;
5857 }
5858 offp = &h->got.offset;
5859 }
5860 else
5861 {
5862 if (local_got_offsets == NULL)
5863 abort ();
5864 offp = &local_got_offsets[r_symndx];
5865 }
5866
5867 /* The offset must always be a multiple of 4. We use the
5868 least significant bit to record whether we have already
5869 processed this entry. */
5870 off = *offp;
5871 if ((off & 1) != 0)
5872 off &= ~1;
5873 else
5874 {
5875 unsigned int tls_m = (tls_mask
5876 & (TLS_LD | TLS_GD | TLS_DTPREL
5877 | TLS_TPREL | TLS_TPRELGD));
5878
5879 if (offp == &htab->tlsld_got.offset)
5880 tls_m = TLS_LD;
5881 else if (h == NULL
5882 || !h->def_dynamic)
5883 tls_m &= ~TLS_LD;
5884
5885 /* We might have multiple got entries for this sym.
5886 Initialize them all. */
5887 do
5888 {
5889 int tls_ty = 0;
5890
5891 if ((tls_m & TLS_LD) != 0)
5892 {
5893 tls_ty = TLS_TLS | TLS_LD;
5894 tls_m &= ~TLS_LD;
5895 }
5896 else if ((tls_m & TLS_GD) != 0)
5897 {
5898 tls_ty = TLS_TLS | TLS_GD;
5899 tls_m &= ~TLS_GD;
5900 }
5901 else if ((tls_m & TLS_DTPREL) != 0)
5902 {
5903 tls_ty = TLS_TLS | TLS_DTPREL;
5904 tls_m &= ~TLS_DTPREL;
5905 }
5906 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5907 {
5908 tls_ty = TLS_TLS | TLS_TPREL;
5909 tls_m = 0;
5910 }
5911
5912 /* Generate relocs for the dynamic linker. */
5913 if ((info->shared || indx != 0)
5914 && (h == NULL
5915 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5916 || h->root.type != bfd_link_hash_undefweak))
5917 {
5918 outrel.r_offset = (htab->got->output_section->vma
5919 + htab->got->output_offset
5920 + off);
5921 outrel.r_addend = 0;
5922 if (tls_ty & (TLS_LD | TLS_GD))
5923 {
5924 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5925 if (tls_ty == (TLS_TLS | TLS_GD))
5926 {
5927 loc = htab->relgot->contents;
5928 loc += (htab->relgot->reloc_count++
5929 * sizeof (Elf32_External_Rela));
5930 bfd_elf32_swap_reloca_out (output_bfd,
5931 &outrel, loc);
5932 outrel.r_offset += 4;
5933 outrel.r_info
5934 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5935 }
5936 }
5937 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5938 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5939 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5940 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5941 else if (indx == 0)
5942 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5943 else
5944 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5945 if (indx == 0)
5946 {
5947 outrel.r_addend += relocation;
5948 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5949 outrel.r_addend -= htab->elf.tls_sec->vma;
5950 }
5951 loc = htab->relgot->contents;
5952 loc += (htab->relgot->reloc_count++
5953 * sizeof (Elf32_External_Rela));
5954 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5955 }
5956
5957 /* Init the .got section contents if we're not
5958 emitting a reloc. */
5959 else
5960 {
5961 bfd_vma value = relocation;
5962
5963 if (tls_ty == (TLS_TLS | TLS_LD))
5964 value = 1;
5965 else if (tls_ty != 0)
5966 {
5967 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5968 if (tls_ty == (TLS_TLS | TLS_TPREL))
5969 value += DTP_OFFSET - TP_OFFSET;
5970
5971 if (tls_ty == (TLS_TLS | TLS_GD))
5972 {
5973 bfd_put_32 (output_bfd, value,
5974 htab->got->contents + off + 4);
5975 value = 1;
5976 }
5977 }
5978 bfd_put_32 (output_bfd, value,
5979 htab->got->contents + off);
5980 }
5981
5982 off += 4;
5983 if (tls_ty & (TLS_LD | TLS_GD))
5984 off += 4;
5985 }
5986 while (tls_m != 0);
5987
5988 off = *offp;
5989 *offp = off | 1;
5990 }
5991
5992 if (off >= (bfd_vma) -2)
5993 abort ();
5994
5995 if ((tls_type & TLS_TLS) != 0)
5996 {
5997 if (tls_type != (TLS_TLS | TLS_LD))
5998 {
5999 if ((tls_mask & TLS_LD) != 0
6000 && !(h == NULL
6001 || !h->def_dynamic))
6002 off += 8;
6003 if (tls_type != (TLS_TLS | TLS_GD))
6004 {
6005 if ((tls_mask & TLS_GD) != 0)
6006 off += 8;
6007 if (tls_type != (TLS_TLS | TLS_DTPREL))
6008 {
6009 if ((tls_mask & TLS_DTPREL) != 0)
6010 off += 4;
6011 }
6012 }
6013 }
6014 }
6015
6016 relocation = htab->got->output_offset + off;
6017 relocation -= htab->elf.hgot->root.u.def.value;
6018
6019 /* Addends on got relocations don't make much sense.
6020 x+off@got is actually x@got+off, and since the got is
6021 generated by a hash table traversal, the value in the
6022 got at entry m+n bears little relation to the entry m. */
6023 if (addend != 0)
6024 (*_bfd_error_handler)
6025 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6026 input_bfd,
6027 input_section,
6028 (long) rel->r_offset,
6029 howto->name,
6030 sym_name);
6031 }
6032 break;
6033
6034 /* Relocations that need no special processing. */
6035 case R_PPC_LOCAL24PC:
6036 /* It makes no sense to point a local relocation
6037 at a symbol not in this object. */
6038 if (unresolved_reloc)
6039 {
6040 if (! (*info->callbacks->undefined_symbol) (info,
6041 h->root.root.string,
6042 input_bfd,
6043 input_section,
6044 rel->r_offset,
6045 TRUE))
6046 return FALSE;
6047 continue;
6048 }
6049 break;
6050
6051 case R_PPC_DTPREL16:
6052 case R_PPC_DTPREL16_LO:
6053 case R_PPC_DTPREL16_HI:
6054 case R_PPC_DTPREL16_HA:
6055 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6056 break;
6057
6058 /* Relocations that may need to be propagated if this is a shared
6059 object. */
6060 case R_PPC_TPREL16:
6061 case R_PPC_TPREL16_LO:
6062 case R_PPC_TPREL16_HI:
6063 case R_PPC_TPREL16_HA:
6064 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6065 /* The TPREL16 relocs shouldn't really be used in shared
6066 libs as they will result in DT_TEXTREL being set, but
6067 support them anyway. */
6068 goto dodyn;
6069
6070 case R_PPC_TPREL32:
6071 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6072 goto dodyn;
6073
6074 case R_PPC_DTPREL32:
6075 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6076 goto dodyn;
6077
6078 case R_PPC_DTPMOD32:
6079 relocation = 1;
6080 addend = 0;
6081 goto dodyn;
6082
6083 case R_PPC_REL16:
6084 case R_PPC_REL16_LO:
6085 case R_PPC_REL16_HI:
6086 case R_PPC_REL16_HA:
6087 break;
6088
6089 case R_PPC_REL24:
6090 case R_PPC_REL32:
6091 case R_PPC_REL14:
6092 case R_PPC_REL14_BRTAKEN:
6093 case R_PPC_REL14_BRNTAKEN:
6094 /* If these relocations are not to a named symbol, they can be
6095 handled right here, no need to bother the dynamic linker. */
6096 if (SYMBOL_REFERENCES_LOCAL (info, h)
6097 || h == htab->elf.hgot)
6098 break;
6099 /* fall through */
6100
6101 /* Relocations that always need to be propagated if this is a shared
6102 object. */
6103 case R_PPC_ADDR32:
6104 case R_PPC_ADDR24:
6105 case R_PPC_ADDR16:
6106 case R_PPC_ADDR16_LO:
6107 case R_PPC_ADDR16_HI:
6108 case R_PPC_ADDR16_HA:
6109 case R_PPC_ADDR14:
6110 case R_PPC_ADDR14_BRTAKEN:
6111 case R_PPC_ADDR14_BRNTAKEN:
6112 case R_PPC_UADDR32:
6113 case R_PPC_UADDR16:
6114 /* r_symndx will be zero only for relocs against symbols
6115 from removed linkonce sections, or sections discarded by
6116 a linker script. */
6117 dodyn:
6118 if (r_symndx == 0)
6119 break;
6120 /* Fall thru. */
6121
6122 if ((input_section->flags & SEC_ALLOC) == 0)
6123 break;
6124 /* Fall thru. */
6125
6126 if ((info->shared
6127 && (h == NULL
6128 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6129 || h->root.type != bfd_link_hash_undefweak)
6130 && (MUST_BE_DYN_RELOC (r_type)
6131 || !SYMBOL_CALLS_LOCAL (info, h)))
6132 || (ELIMINATE_COPY_RELOCS
6133 && !info->shared
6134 && h != NULL
6135 && h->dynindx != -1
6136 && !h->non_got_ref
6137 && h->def_dynamic
6138 && !h->def_regular))
6139 {
6140 int skip;
6141
6142 #ifdef DEBUG
6143 fprintf (stderr, "ppc_elf_relocate_section needs to "
6144 "create relocation for %s\n",
6145 (h && h->root.root.string
6146 ? h->root.root.string : "<unknown>"));
6147 #endif
6148
6149 /* When generating a shared object, these relocations
6150 are copied into the output file to be resolved at run
6151 time. */
6152 if (sreloc == NULL)
6153 {
6154 const char *name;
6155
6156 name = (bfd_elf_string_from_elf_section
6157 (input_bfd,
6158 elf_elfheader (input_bfd)->e_shstrndx,
6159 elf_section_data (input_section)->rel_hdr.sh_name));
6160 if (name == NULL)
6161 return FALSE;
6162
6163 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6164 && strcmp (bfd_get_section_name (input_bfd,
6165 input_section),
6166 name + 5) == 0);
6167
6168 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6169 BFD_ASSERT (sreloc != NULL);
6170 }
6171
6172 skip = 0;
6173
6174 outrel.r_offset =
6175 _bfd_elf_section_offset (output_bfd, info, input_section,
6176 rel->r_offset);
6177 if (outrel.r_offset == (bfd_vma) -1
6178 || outrel.r_offset == (bfd_vma) -2)
6179 skip = (int) outrel.r_offset;
6180 outrel.r_offset += (input_section->output_section->vma
6181 + input_section->output_offset);
6182
6183 if (skip)
6184 memset (&outrel, 0, sizeof outrel);
6185 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6186 {
6187 unresolved_reloc = FALSE;
6188 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6189 outrel.r_addend = rel->r_addend;
6190 }
6191 else
6192 {
6193 outrel.r_addend = relocation + rel->r_addend;
6194
6195 if (r_type == R_PPC_ADDR32)
6196 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6197 else
6198 {
6199 long indx;
6200
6201 if (bfd_is_abs_section (sec))
6202 indx = 0;
6203 else if (sec == NULL || sec->owner == NULL)
6204 {
6205 bfd_set_error (bfd_error_bad_value);
6206 return FALSE;
6207 }
6208 else
6209 {
6210 asection *osec;
6211
6212 /* We are turning this relocation into one
6213 against a section symbol. It would be
6214 proper to subtract the symbol's value,
6215 osec->vma, from the emitted reloc addend,
6216 but ld.so expects buggy relocs. */
6217 osec = sec->output_section;
6218 indx = elf_section_data (osec)->dynindx;
6219 BFD_ASSERT (indx > 0);
6220 #ifdef DEBUG
6221 if (indx <= 0)
6222 printf ("indx=%d section=%s flags=%08x name=%s\n",
6223 indx, osec->name, osec->flags,
6224 h->root.root.string);
6225 #endif
6226 }
6227
6228 outrel.r_info = ELF32_R_INFO (indx, r_type);
6229 }
6230 }
6231
6232 loc = sreloc->contents;
6233 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6234 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6235
6236 if (skip == -1)
6237 continue;
6238
6239 /* This reloc will be computed at runtime. We clear the memory
6240 so that it contains predictable value. */
6241 if (! skip
6242 && ((input_section->flags & SEC_ALLOC) != 0
6243 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6244 {
6245 relocation = howto->pc_relative ? outrel.r_offset : 0;
6246 addend = 0;
6247 break;
6248 }
6249 }
6250 break;
6251
6252 case R_PPC_RELAX32PC_PLT:
6253 case R_PPC_RELAX32_PLT:
6254 {
6255 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6256
6257 if (!htab->old_plt)
6258 relocation = (htab->glink->output_section->vma
6259 + htab->glink->output_offset
6260 + ent->glink_offset);
6261 else
6262 relocation = (htab->plt->output_section->vma
6263 + htab->plt->output_offset
6264 + ent->plt.offset);
6265 addend = 0;
6266 }
6267 if (r_type == R_PPC_RELAX32_PLT)
6268 goto relax32;
6269 /* Fall thru */
6270
6271 case R_PPC_RELAX32PC:
6272 relocation -= (input_section->output_section->vma
6273 + input_section->output_offset
6274 + rel->r_offset - 4);
6275 /* Fall thru */
6276
6277 case R_PPC_RELAX32:
6278 relax32:
6279 {
6280 unsigned long t0;
6281 unsigned long t1;
6282
6283 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6284 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6285
6286 /* We're clearing the bits for R_PPC_ADDR16_HA
6287 and R_PPC_ADDR16_LO here. */
6288 t0 &= ~0xffff;
6289 t1 &= ~0xffff;
6290
6291 /* t0 is HA, t1 is LO */
6292 relocation += addend;
6293 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6294 t1 |= relocation & 0xffff;
6295
6296 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6297 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6298 }
6299 continue;
6300
6301 /* Indirect .sdata relocation. */
6302 case R_PPC_EMB_SDAI16:
6303 BFD_ASSERT (htab->sdata[0].section != NULL);
6304 relocation
6305 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6306 h, relocation, rel);
6307 break;
6308
6309 /* Indirect .sdata2 relocation. */
6310 case R_PPC_EMB_SDA2I16:
6311 BFD_ASSERT (htab->sdata[1].section != NULL);
6312 relocation
6313 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6314 h, relocation, rel);
6315 break;
6316
6317 /* Handle the TOC16 reloc. We want to use the offset within the .got
6318 section, not the actual VMA. This is appropriate when generating
6319 an embedded ELF object, for which the .got section acts like the
6320 AIX .toc section. */
6321 case R_PPC_TOC16: /* phony GOT16 relocations */
6322 BFD_ASSERT (sec != NULL);
6323 BFD_ASSERT (bfd_is_und_section (sec)
6324 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6325 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6326
6327 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6328 break;
6329
6330 case R_PPC_PLTREL24:
6331 /* Relocation is to the entry for this symbol in the
6332 procedure linkage table. */
6333 {
6334 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6335
6336 addend = 0;
6337 if (ent == NULL
6338 || htab->plt == NULL)
6339 {
6340 /* We didn't make a PLT entry for this symbol. This
6341 happens when statically linking PIC code, or when
6342 using -Bsymbolic. */
6343 break;
6344 }
6345
6346 unresolved_reloc = FALSE;
6347 if (!htab->old_plt)
6348 relocation = (htab->glink->output_section->vma
6349 + htab->glink->output_offset
6350 + ent->glink_offset);
6351 else
6352 relocation = (htab->plt->output_section->vma
6353 + htab->plt->output_offset
6354 + ent->plt.offset);
6355 }
6356 break;
6357
6358 /* Relocate against _SDA_BASE_. */
6359 case R_PPC_SDAREL16:
6360 {
6361 const char *name;
6362 struct elf_link_hash_entry *sh;
6363
6364 BFD_ASSERT (sec != NULL);
6365 name = bfd_get_section_name (abfd, sec->output_section);
6366 if (! ((strncmp (name, ".sdata", 6) == 0
6367 && (name[6] == 0 || name[6] == '.'))
6368 || (strncmp (name, ".sbss", 5) == 0
6369 && (name[5] == 0 || name[5] == '.'))))
6370 {
6371 (*_bfd_error_handler)
6372 (_("%B: the target (%s) of a %s relocation is "
6373 "in the wrong output section (%s)"),
6374 input_bfd,
6375 sym_name,
6376 howto->name,
6377 name);
6378 }
6379 sh = htab->sdata[0].sym;
6380 addend -= (sh->root.u.def.value
6381 + sh->root.u.def.section->output_offset
6382 + sh->root.u.def.section->output_section->vma);
6383 }
6384 break;
6385
6386 /* Relocate against _SDA2_BASE_. */
6387 case R_PPC_EMB_SDA2REL:
6388 {
6389 const char *name;
6390 struct elf_link_hash_entry *sh;
6391
6392 BFD_ASSERT (sec != NULL);
6393 name = bfd_get_section_name (abfd, sec->output_section);
6394 if (! (strncmp (name, ".sdata2", 7) == 0
6395 || strncmp (name, ".sbss2", 6) == 0))
6396 {
6397 (*_bfd_error_handler)
6398 (_("%B: the target (%s) of a %s relocation is "
6399 "in the wrong output section (%s)"),
6400 input_bfd,
6401 sym_name,
6402 howto->name,
6403 name);
6404
6405 bfd_set_error (bfd_error_bad_value);
6406 ret = FALSE;
6407 continue;
6408 }
6409 sh = htab->sdata[1].sym;
6410 addend -= (sh->root.u.def.value
6411 + sh->root.u.def.section->output_offset
6412 + sh->root.u.def.section->output_section->vma);
6413 }
6414 break;
6415
6416 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6417 case R_PPC_EMB_SDA21:
6418 case R_PPC_EMB_RELSDA:
6419 {
6420 const char *name;
6421 int reg;
6422 struct elf_link_hash_entry *sh;
6423
6424 BFD_ASSERT (sec != NULL);
6425 name = bfd_get_section_name (abfd, sec->output_section);
6426 if (((strncmp (name, ".sdata", 6) == 0
6427 && (name[6] == 0 || name[6] == '.'))
6428 || (strncmp (name, ".sbss", 5) == 0
6429 && (name[5] == 0 || name[5] == '.'))))
6430 {
6431 reg = 13;
6432 sh = htab->sdata[0].sym;
6433 addend -= (sh->root.u.def.value
6434 + sh->root.u.def.section->output_offset
6435 + sh->root.u.def.section->output_section->vma);
6436 }
6437
6438 else if (strncmp (name, ".sdata2", 7) == 0
6439 || strncmp (name, ".sbss2", 6) == 0)
6440 {
6441 reg = 2;
6442 sh = htab->sdata[1].sym;
6443 addend -= (sh->root.u.def.value
6444 + sh->root.u.def.section->output_offset
6445 + sh->root.u.def.section->output_section->vma);
6446 }
6447
6448 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6449 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6450 {
6451 reg = 0;
6452 }
6453
6454 else
6455 {
6456 (*_bfd_error_handler)
6457 (_("%B: the target (%s) of a %s relocation is "
6458 "in the wrong output section (%s)"),
6459 input_bfd,
6460 sym_name,
6461 howto->name,
6462 name);
6463
6464 bfd_set_error (bfd_error_bad_value);
6465 ret = FALSE;
6466 continue;
6467 }
6468
6469 if (r_type == R_PPC_EMB_SDA21)
6470 { /* fill in register field */
6471 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6472 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6473 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6474 }
6475 }
6476 break;
6477
6478 /* Relocate against the beginning of the section. */
6479 case R_PPC_SECTOFF:
6480 case R_PPC_SECTOFF_LO:
6481 case R_PPC_SECTOFF_HI:
6482 case R_PPC_SECTOFF_HA:
6483 BFD_ASSERT (sec != NULL);
6484 addend -= sec->output_section->vma;
6485 break;
6486
6487 /* Negative relocations. */
6488 case R_PPC_EMB_NADDR32:
6489 case R_PPC_EMB_NADDR16:
6490 case R_PPC_EMB_NADDR16_LO:
6491 case R_PPC_EMB_NADDR16_HI:
6492 case R_PPC_EMB_NADDR16_HA:
6493 addend -= 2 * relocation;
6494 break;
6495
6496 case R_PPC_COPY:
6497 case R_PPC_GLOB_DAT:
6498 case R_PPC_JMP_SLOT:
6499 case R_PPC_RELATIVE:
6500 case R_PPC_PLT32:
6501 case R_PPC_PLTREL32:
6502 case R_PPC_PLT16_LO:
6503 case R_PPC_PLT16_HI:
6504 case R_PPC_PLT16_HA:
6505 case R_PPC_ADDR30:
6506 case R_PPC_EMB_RELSEC16:
6507 case R_PPC_EMB_RELST_LO:
6508 case R_PPC_EMB_RELST_HI:
6509 case R_PPC_EMB_RELST_HA:
6510 case R_PPC_EMB_BIT_FLD:
6511 (*_bfd_error_handler)
6512 (_("%B: relocation %s is not yet supported for symbol %s."),
6513 input_bfd,
6514 howto->name,
6515 sym_name);
6516
6517 bfd_set_error (bfd_error_invalid_operation);
6518 ret = FALSE;
6519 continue;
6520 }
6521
6522 /* Do any further special processing. */
6523 switch (r_type)
6524 {
6525 default:
6526 break;
6527
6528 case R_PPC_ADDR16_HA:
6529 case R_PPC_REL16_HA:
6530 case R_PPC_GOT16_HA:
6531 case R_PPC_PLT16_HA:
6532 case R_PPC_SECTOFF_HA:
6533 case R_PPC_TPREL16_HA:
6534 case R_PPC_DTPREL16_HA:
6535 case R_PPC_GOT_TLSGD16_HA:
6536 case R_PPC_GOT_TLSLD16_HA:
6537 case R_PPC_GOT_TPREL16_HA:
6538 case R_PPC_GOT_DTPREL16_HA:
6539 case R_PPC_EMB_NADDR16_HA:
6540 case R_PPC_EMB_RELST_HA:
6541 /* It's just possible that this symbol is a weak symbol
6542 that's not actually defined anywhere. In that case,
6543 'sec' would be NULL, and we should leave the symbol
6544 alone (it will be set to zero elsewhere in the link). */
6545 if (sec != NULL)
6546 /* Add 0x10000 if sign bit in 0:15 is set.
6547 Bits 0:15 are not used. */
6548 addend += 0x8000;
6549 break;
6550 }
6551
6552 #ifdef DEBUG
6553 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6554 "offset = %ld, addend = %ld\n",
6555 howto->name,
6556 (int) r_type,
6557 sym_name,
6558 r_symndx,
6559 (long) rel->r_offset,
6560 (long) addend);
6561 #endif
6562
6563 if (unresolved_reloc
6564 && !((input_section->flags & SEC_DEBUGGING) != 0
6565 && h->def_dynamic))
6566 {
6567 (*_bfd_error_handler)
6568 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6569 input_bfd,
6570 input_section,
6571 (long) rel->r_offset,
6572 howto->name,
6573 sym_name);
6574 ret = FALSE;
6575 }
6576
6577 r = _bfd_final_link_relocate (howto,
6578 input_bfd,
6579 input_section,
6580 contents,
6581 rel->r_offset,
6582 relocation,
6583 addend);
6584
6585 if (r != bfd_reloc_ok)
6586 {
6587 if (r == bfd_reloc_overflow)
6588 {
6589 if (warned)
6590 continue;
6591 if (h != NULL
6592 && h->root.type == bfd_link_hash_undefweak
6593 && howto->pc_relative)
6594 {
6595 /* Assume this is a call protected by other code that
6596 detect the symbol is undefined. If this is the case,
6597 we can safely ignore the overflow. If not, the
6598 program is hosed anyway, and a little warning isn't
6599 going to help. */
6600
6601 continue;
6602 }
6603
6604 if (! (*info->callbacks->reloc_overflow) (info,
6605 (h ? &h->root : NULL),
6606 sym_name,
6607 howto->name,
6608 rel->r_addend,
6609 input_bfd,
6610 input_section,
6611 rel->r_offset))
6612 return FALSE;
6613 }
6614 else
6615 {
6616 (*_bfd_error_handler)
6617 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6618 input_bfd, input_section,
6619 (long) rel->r_offset, howto->name, sym_name, (int) r);
6620 ret = FALSE;
6621 }
6622 }
6623 }
6624
6625 #ifdef DEBUG
6626 fprintf (stderr, "\n");
6627 #endif
6628
6629 return ret;
6630 }
6631 \f
6632 #define PPC_LO(v) ((v) & 0xffff)
6633 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6634 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6635
6636 /* Finish up dynamic symbol handling. We set the contents of various
6637 dynamic sections here. */
6638
6639 static bfd_boolean
6640 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6641 struct bfd_link_info *info,
6642 struct elf_link_hash_entry *h,
6643 Elf_Internal_Sym *sym)
6644 {
6645 struct ppc_elf_link_hash_table *htab;
6646 struct plt_entry *ent;
6647 bfd_boolean doneone;
6648
6649 #ifdef DEBUG
6650 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6651 h->root.root.string);
6652 #endif
6653
6654 htab = ppc_elf_hash_table (info);
6655 BFD_ASSERT (htab->elf.dynobj != NULL);
6656
6657 doneone = FALSE;
6658 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6659 if (ent->plt.offset != (bfd_vma) -1)
6660 {
6661 if (!doneone)
6662 {
6663 Elf_Internal_Rela rela;
6664 bfd_byte *loc;
6665 bfd_vma reloc_index;
6666
6667 if (!(htab->old_plt || htab->is_vxworks))
6668 reloc_index = ent->plt.offset / 4;
6669 else
6670 {
6671 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6672 / htab->plt_slot_size);
6673 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6674 && !htab->is_vxworks)
6675 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6676 }
6677
6678 /* This symbol has an entry in the procedure linkage table.
6679 Set it up. */
6680 if (htab->is_vxworks)
6681 {
6682 bfd_vma got_offset;
6683 const bfd_vma *plt_entry;
6684
6685 /* The first three entries in .got.plt are reserved. */
6686 got_offset = (reloc_index + 3) * 4;
6687
6688 /* Use the right PLT. */
6689 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6690 : ppc_elf_vxworks_plt_entry;
6691
6692 /* Fill in the .plt on VxWorks. */
6693 if (info->shared)
6694 {
6695 bfd_vma got_offset_hi = (got_offset >> 16)
6696 + ((got_offset & 0x8000) >> 15);
6697
6698 bfd_put_32 (output_bfd,
6699 plt_entry[0] | (got_offset_hi & 0xffff),
6700 htab->plt->contents + ent->plt.offset + 0);
6701 bfd_put_32 (output_bfd,
6702 plt_entry[1] | (got_offset & 0xffff),
6703 htab->plt->contents + ent->plt.offset + 4);
6704 }
6705 else
6706 {
6707 bfd_vma got_loc
6708 = (got_offset
6709 + htab->elf.hgot->root.u.def.value
6710 + htab->elf.hgot->root.u.def.section->output_offset
6711 + htab->elf.hgot->root.u.def.section->output_section->vma);
6712 bfd_vma got_loc_hi = (got_loc >> 16)
6713 + ((got_loc & 0x8000) >> 15);
6714
6715 bfd_put_32 (output_bfd,
6716 plt_entry[0] | (got_loc_hi & 0xffff),
6717 htab->plt->contents + ent->plt.offset + 0);
6718 bfd_put_32 (output_bfd,
6719 plt_entry[1] | (got_loc & 0xffff),
6720 htab->plt->contents + ent->plt.offset + 4);
6721 }
6722
6723 bfd_put_32 (output_bfd, plt_entry[2],
6724 htab->plt->contents + ent->plt.offset + 8);
6725 bfd_put_32 (output_bfd, plt_entry[3],
6726 htab->plt->contents + ent->plt.offset + 12);
6727
6728 /* This instruction is an immediate load. The value loaded is
6729 the byte offset of the R_PPC_JMP_SLOT relocation from the
6730 start of the .rela.plt section. The value is stored in the
6731 low-order 16 bits of the load instruction. */
6732 /* NOTE: It appears that this is now an index rather than a
6733 prescaled offset. */
6734 bfd_put_32 (output_bfd,
6735 plt_entry[4] | reloc_index,
6736 htab->plt->contents + ent->plt.offset + 16);
6737 /* This instruction is a PC-relative branch whose target is
6738 the start of the PLT section. The address of this branch
6739 instruction is 20 bytes beyond the start of this PLT entry.
6740 The address is encoded in bits 6-29, inclusive. The value
6741 stored is right-shifted by two bits, permitting a 26-bit
6742 offset. */
6743 bfd_put_32 (output_bfd,
6744 (plt_entry[5]
6745 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6746 htab->plt->contents + ent->plt.offset + 20);
6747 bfd_put_32 (output_bfd, plt_entry[6],
6748 htab->plt->contents + ent->plt.offset + 24);
6749 bfd_put_32 (output_bfd, plt_entry[7],
6750 htab->plt->contents + ent->plt.offset + 28);
6751
6752 /* Fill in the GOT entry corresponding to this PLT slot with
6753 the address immediately after the the "bctr" instruction
6754 in this PLT entry. */
6755 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6756 + htab->plt->output_offset
6757 + ent->plt.offset + 16),
6758 htab->sgotplt->contents + got_offset);
6759
6760 if (!info->shared)
6761 {
6762 /* Fill in a couple of entries in .rela.plt.unloaded. */
6763 loc = htab->srelplt2->contents
6764 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6765 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6766 * sizeof (Elf32_External_Rela));
6767
6768 /* Provide the @ha relocation for the first instruction. */
6769 rela.r_offset = (htab->plt->output_section->vma
6770 + htab->plt->output_offset
6771 + ent->plt.offset + 2);
6772 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6773 R_PPC_ADDR16_HA);
6774 rela.r_addend = got_offset;
6775 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6776 loc += sizeof (Elf32_External_Rela);
6777
6778 /* Provide the @l relocation for the second instruction. */
6779 rela.r_offset = (htab->plt->output_section->vma
6780 + htab->plt->output_offset
6781 + ent->plt.offset + 6);
6782 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6783 R_PPC_ADDR16_LO);
6784 rela.r_addend = got_offset;
6785 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6786 loc += sizeof (Elf32_External_Rela);
6787
6788 /* Provide a relocation for the GOT entry corresponding to this
6789 PLT slot. Point it at the middle of the .plt entry. */
6790 rela.r_offset = (htab->sgotplt->output_section->vma
6791 + htab->sgotplt->output_offset
6792 + got_offset);
6793 rela.r_info = ELF32_R_INFO (htab->hplt->indx,
6794 R_PPC_ADDR32);
6795 rela.r_addend = ent->plt.offset + 16;
6796 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6797 }
6798
6799 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6800 In particular, the offset for the relocation is not the
6801 address of the PLT entry for this function, as specified
6802 by the ABI. Instead, the offset is set to the address of
6803 the GOT slot for this function. See EABI 4.4.4.1. */
6804 rela.r_offset = (htab->sgotplt->output_section->vma
6805 + htab->sgotplt->output_offset
6806 + got_offset);
6807
6808 }
6809 else
6810 {
6811 rela.r_offset = (htab->plt->output_section->vma
6812 + htab->plt->output_offset
6813 + ent->plt.offset);
6814 if (htab->old_plt)
6815 {
6816 /* We don't need to fill in the .plt. The ppc dynamic
6817 linker will fill it in. */
6818 }
6819 else
6820 {
6821 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6822 + htab->glink->output_section->vma
6823 + htab->glink->output_offset);
6824 bfd_put_32 (output_bfd, val,
6825 htab->plt->contents + ent->plt.offset);
6826 }
6827 }
6828
6829 /* Fill in the entry in the .rela.plt section. */
6830 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6831 rela.r_addend = 0;
6832
6833 loc = (htab->relplt->contents
6834 + reloc_index * sizeof (Elf32_External_Rela));
6835 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6836
6837 if (!h->def_regular)
6838 {
6839 /* Mark the symbol as undefined, rather than as defined in
6840 the .plt section. Leave the value alone. */
6841 sym->st_shndx = SHN_UNDEF;
6842 /* If the symbol is weak, we do need to clear the value.
6843 Otherwise, the PLT entry would provide a definition for
6844 the symbol even if the symbol wasn't defined anywhere,
6845 and so the symbol would never be NULL. */
6846 if (!h->ref_regular_nonweak)
6847 sym->st_value = 0;
6848 }
6849 doneone = TRUE;
6850 }
6851
6852 if (!htab->old_plt)
6853 {
6854 bfd_vma plt;
6855 unsigned char *p;
6856
6857 plt = (ent->plt.offset
6858 + htab->plt->output_section->vma
6859 + htab->plt->output_offset);
6860 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6861
6862 if (info->shared || info->pie)
6863 {
6864 bfd_vma got = 0;
6865
6866 if (ent->addend >= 32768)
6867 got = (ent->addend
6868 + ent->sec->output_section->vma
6869 + ent->sec->output_offset);
6870 else if (htab->elf.hgot != NULL)
6871 got = (htab->elf.hgot->root.u.def.value
6872 + htab->elf.hgot->root.u.def.section->output_section->vma
6873 + htab->elf.hgot->root.u.def.section->output_offset);
6874
6875 plt -= got;
6876
6877 if (plt + 0x8000 < 0x10000)
6878 {
6879 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6880 p += 4;
6881 bfd_put_32 (output_bfd, MTCTR_11, p);
6882 p += 4;
6883 bfd_put_32 (output_bfd, BCTR, p);
6884 p += 4;
6885 bfd_put_32 (output_bfd, NOP, p);
6886 p += 4;
6887 }
6888 else
6889 {
6890 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6891 p += 4;
6892 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6893 p += 4;
6894 bfd_put_32 (output_bfd, MTCTR_11, p);
6895 p += 4;
6896 bfd_put_32 (output_bfd, BCTR, p);
6897 p += 4;
6898 }
6899 }
6900 else
6901 {
6902 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6903 p += 4;
6904 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6905 p += 4;
6906 bfd_put_32 (output_bfd, MTCTR_11, p);
6907 p += 4;
6908 bfd_put_32 (output_bfd, BCTR, p);
6909 p += 4;
6910
6911 /* We only need one non-PIC glink stub. */
6912 break;
6913 }
6914 }
6915 else
6916 break;
6917 }
6918
6919 if (h->needs_copy)
6920 {
6921 asection *s;
6922 Elf_Internal_Rela rela;
6923 bfd_byte *loc;
6924
6925 /* This symbols needs a copy reloc. Set it up. */
6926
6927 #ifdef DEBUG
6928 fprintf (stderr, ", copy");
6929 #endif
6930
6931 BFD_ASSERT (h->dynindx != -1);
6932
6933 if (ppc_elf_hash_entry (h)->has_sda_refs)
6934 s = htab->relsbss;
6935 else
6936 s = htab->relbss;
6937 BFD_ASSERT (s != NULL);
6938
6939 rela.r_offset = (h->root.u.def.value
6940 + h->root.u.def.section->output_section->vma
6941 + h->root.u.def.section->output_offset);
6942 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
6943 rela.r_addend = 0;
6944 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
6945 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6946 }
6947
6948 #ifdef DEBUG
6949 fprintf (stderr, "\n");
6950 #endif
6951
6952 /* Mark some specially defined symbols as absolute. */
6953 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
6954 || (!htab->is_vxworks
6955 && (h == htab->elf.hgot
6956 || strcmp (h->root.root.string,
6957 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
6958 sym->st_shndx = SHN_ABS;
6959
6960 return TRUE;
6961 }
6962 \f
6963 static enum elf_reloc_type_class
6964 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
6965 {
6966 switch (ELF32_R_TYPE (rela->r_info))
6967 {
6968 case R_PPC_RELATIVE:
6969 return reloc_class_relative;
6970 case R_PPC_REL24:
6971 case R_PPC_ADDR24:
6972 case R_PPC_JMP_SLOT:
6973 return reloc_class_plt;
6974 case R_PPC_COPY:
6975 return reloc_class_copy;
6976 default:
6977 return reloc_class_normal;
6978 }
6979 }
6980 \f
6981 /* Finish up the dynamic sections. */
6982
6983 static bfd_boolean
6984 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
6985 struct bfd_link_info *info)
6986 {
6987 asection *sdyn;
6988 asection *splt;
6989 struct ppc_elf_link_hash_table *htab;
6990 bfd_vma got;
6991 bfd * dynobj;
6992
6993 #ifdef DEBUG
6994 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
6995 #endif
6996
6997 htab = ppc_elf_hash_table (info);
6998 dynobj = elf_hash_table (info)->dynobj;
6999 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7000 if (htab->is_vxworks)
7001 splt = bfd_get_section_by_name (dynobj, ".plt");
7002 else
7003 splt = NULL;
7004
7005 got = 0;
7006 if (htab->elf.hgot != NULL)
7007 got = (htab->elf.hgot->root.u.def.value
7008 + htab->elf.hgot->root.u.def.section->output_section->vma
7009 + htab->elf.hgot->root.u.def.section->output_offset);
7010
7011 if (htab->elf.dynamic_sections_created)
7012 {
7013 Elf32_External_Dyn *dyncon, *dynconend;
7014
7015 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7016
7017 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7018 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7019 for (; dyncon < dynconend; dyncon++)
7020 {
7021 Elf_Internal_Dyn dyn;
7022 asection *s;
7023
7024 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7025
7026 switch (dyn.d_tag)
7027 {
7028 case DT_PLTGOT:
7029 if (htab->is_vxworks)
7030 s = htab->sgotplt;
7031 else
7032 s = htab->plt;
7033 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7034 break;
7035
7036 case DT_PLTRELSZ:
7037 dyn.d_un.d_val = htab->relplt->size;
7038 break;
7039
7040 case DT_JMPREL:
7041 s = htab->relplt;
7042 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7043 break;
7044
7045 case DT_PPC_GOT:
7046 dyn.d_un.d_ptr = got;
7047 break;
7048
7049 case DT_RELASZ:
7050 if (htab->is_vxworks)
7051 {
7052 if (htab->relplt)
7053 dyn.d_un.d_ptr -= htab->relplt->size;
7054 break;
7055 }
7056 continue;
7057
7058 default:
7059 continue;
7060 }
7061
7062 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7063 }
7064 }
7065
7066 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7067 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7068 if (htab->got != NULL)
7069 {
7070 unsigned char *p = htab->got->contents;
7071 bfd_vma val;
7072
7073 p += htab->elf.hgot->root.u.def.value;
7074 if (htab->old_plt && !htab->is_vxworks)
7075 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7076
7077 val = 0;
7078 if (sdyn != NULL)
7079 val = sdyn->output_section->vma + sdyn->output_offset;
7080 bfd_put_32 (output_bfd, val, p);
7081
7082 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7083 }
7084
7085 /* Fill in the first entry in the VxWorks procedure linkage table. */
7086 if (splt && splt->size > 0)
7087 {
7088 /* Use the right PLT. */
7089 static const bfd_vma *plt_entry = NULL;
7090 plt_entry = info->shared ?
7091 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7092
7093 if (!info->shared)
7094 {
7095 bfd_vma got_value =
7096 (htab->elf.hgot->root.u.def.section->output_section->vma
7097 + htab->elf.hgot->root.u.def.section->output_offset
7098 + htab->elf.hgot->root.u.def.value);
7099 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7100
7101 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7102 splt->contents + 0);
7103 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7104 splt->contents + 4);
7105 }
7106 else
7107 {
7108 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7109 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7110 }
7111 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7112 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7113 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7114 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7115 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7116 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7117
7118 if (! info->shared)
7119 {
7120 Elf_Internal_Rela rela;
7121 bfd_byte *loc;
7122
7123 loc = htab->srelplt2->contents;
7124
7125 /* Output the @ha relocation for the first instruction. */
7126 rela.r_offset = (htab->plt->output_section->vma
7127 + htab->plt->output_offset
7128 + 2);
7129 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7130 rela.r_addend = 0;
7131 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7132 loc += sizeof (Elf32_External_Rela);
7133
7134 /* Output the @l relocation for the second instruction. */
7135 rela.r_offset = (htab->plt->output_section->vma
7136 + htab->plt->output_offset
7137 + 6);
7138 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7139 rela.r_addend = 0;
7140 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7141 loc += sizeof (Elf32_External_Rela);
7142
7143 /* Fix up the remaining relocations. They may have the wrong
7144 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7145 in which symbols were output. */
7146 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7147 {
7148 Elf_Internal_Rela rel;
7149
7150 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7151 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7152 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7153 loc += sizeof (Elf32_External_Rela);
7154
7155 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7156 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7157 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7158 loc += sizeof (Elf32_External_Rela);
7159
7160 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7161 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_PPC_ADDR32);
7162 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7163 loc += sizeof (Elf32_External_Rela);
7164 }
7165 }
7166 }
7167
7168 if (htab->glink != NULL && htab->glink->contents != NULL)
7169 {
7170 unsigned char *p;
7171 unsigned char *endp;
7172 bfd_vma res0;
7173 unsigned int i;
7174
7175 /*
7176 * PIC glink code is the following:
7177 *
7178 * # ith PLT code stub.
7179 * addis 11,30,(plt+(i-1)*4-got)@ha
7180 * lwz 11,(plt+(i-1)*4-got)@l(11)
7181 * mtctr 11
7182 * bctr
7183 *
7184 * # A table of branches, one for each plt entry.
7185 * # The idea is that the plt call stub loads ctr (and r11) with these
7186 * # addresses, so (r11 - res_0) gives the plt index * 4.
7187 * res_0: b PLTresolve
7188 * res_1: b PLTresolve
7189 * .
7190 * # Some number of entries towards the end can be nops
7191 * res_n_m3: nop
7192 * res_n_m2: nop
7193 * res_n_m1:
7194 *
7195 * PLTresolve:
7196 * addis 11,11,(1f-res_0)@ha
7197 * mflr 0
7198 * bcl 20,31,1f
7199 * 1: addi 11,11,(1b-res_0)@l
7200 * mflr 12
7201 * mtlr 0
7202 * sub 11,11,12 # r11 = index * 4
7203 * addis 12,12,(got+4-1b)@ha
7204 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7205 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7206 * mtctr 0
7207 * add 0,11,11
7208 * add 11,0,11 # r11 = index * 12 = reloc offset.
7209 * bctr
7210 */
7211 static const unsigned int pic_plt_resolve[] =
7212 {
7213 ADDIS_11_11,
7214 MFLR_0,
7215 BCL_20_31,
7216 ADDI_11_11,
7217 MFLR_12,
7218 MTLR_0,
7219 SUB_11_11_12,
7220 ADDIS_12_12,
7221 LWZ_0_12,
7222 LWZ_12_12,
7223 MTCTR_0,
7224 ADD_0_11_11,
7225 ADD_11_0_11,
7226 BCTR,
7227 NOP,
7228 NOP
7229 };
7230
7231 static const unsigned int plt_resolve[] =
7232 {
7233 LIS_12,
7234 ADDIS_11_11,
7235 LWZ_0_12,
7236 ADDI_11_11,
7237 MTCTR_0,
7238 ADD_0_11_11,
7239 LWZ_12_12,
7240 ADD_11_0_11,
7241 BCTR,
7242 NOP,
7243 NOP,
7244 NOP,
7245 NOP,
7246 NOP,
7247 NOP,
7248 NOP
7249 };
7250
7251 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7252 abort ();
7253 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7254 abort ();
7255
7256 /* Build the branch table, one for each plt entry (less one),
7257 and perhaps some padding. */
7258 p = htab->glink->contents;
7259 p += htab->glink_pltresolve;
7260 endp = htab->glink->contents;
7261 endp += htab->glink->size - GLINK_PLTRESOLVE;
7262 while (p < endp - 8 * 4)
7263 {
7264 bfd_put_32 (output_bfd, B + endp - p, p);
7265 p += 4;
7266 }
7267 while (p < endp)
7268 {
7269 bfd_put_32 (output_bfd, NOP, p);
7270 p += 4;
7271 }
7272
7273 res0 = (htab->glink_pltresolve
7274 + htab->glink->output_section->vma
7275 + htab->glink->output_offset);
7276
7277 /* Last comes the PLTresolve stub. */
7278 if (info->shared || info->pie)
7279 {
7280 bfd_vma bcl;
7281
7282 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7283 {
7284 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7285 p += 4;
7286 }
7287 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7288
7289 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7290 + htab->glink->output_section->vma
7291 + htab->glink->output_offset);
7292
7293 bfd_put_32 (output_bfd,
7294 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7295 bfd_put_32 (output_bfd,
7296 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7297 bfd_put_32 (output_bfd,
7298 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7299 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7300 {
7301 bfd_put_32 (output_bfd,
7302 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7303 bfd_put_32 (output_bfd,
7304 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7305 }
7306 else
7307 {
7308 bfd_put_32 (output_bfd,
7309 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7310 bfd_put_32 (output_bfd,
7311 LWZ_12_12 + 4, p + 9*4);
7312 }
7313 }
7314 else
7315 {
7316 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7317 {
7318 bfd_put_32 (output_bfd, plt_resolve[i], p);
7319 p += 4;
7320 }
7321 p -= 4 * ARRAY_SIZE (plt_resolve);
7322
7323 bfd_put_32 (output_bfd,
7324 LIS_12 + PPC_HA (got + 4), p + 0*4);
7325 bfd_put_32 (output_bfd,
7326 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7327 bfd_put_32 (output_bfd,
7328 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7329 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7330 {
7331 bfd_put_32 (output_bfd,
7332 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7333 bfd_put_32 (output_bfd,
7334 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7335 }
7336 else
7337 {
7338 bfd_put_32 (output_bfd,
7339 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7340 bfd_put_32 (output_bfd,
7341 LWZ_12_12 + 4, p + 6*4);
7342 }
7343 }
7344 }
7345
7346 return TRUE;
7347 }
7348 \f
7349 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7350 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7351 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7352 #define TARGET_BIG_NAME "elf32-powerpc"
7353 #define ELF_ARCH bfd_arch_powerpc
7354 #define ELF_MACHINE_CODE EM_PPC
7355 #ifdef __QNXTARGET__
7356 #define ELF_MAXPAGESIZE 0x1000
7357 #else
7358 #define ELF_MAXPAGESIZE 0x10000
7359 #endif
7360 #define ELF_MINPAGESIZE 0x1000
7361 #define elf_info_to_howto ppc_elf_info_to_howto
7362
7363 #ifdef EM_CYGNUS_POWERPC
7364 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7365 #endif
7366
7367 #ifdef EM_PPC_OLD
7368 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7369 #endif
7370
7371 #define elf_backend_plt_not_loaded 1
7372 #define elf_backend_can_gc_sections 1
7373 #define elf_backend_can_refcount 1
7374 #define elf_backend_rela_normal 1
7375
7376 #define bfd_elf32_mkobject ppc_elf_mkobject
7377 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7378 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7379 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7380 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7381 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7382
7383 #define elf_backend_object_p ppc_elf_object_p
7384 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7385 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7386 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7387 #define elf_backend_relocate_section ppc_elf_relocate_section
7388 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7389 #define elf_backend_check_relocs ppc_elf_check_relocs
7390 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7391 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7392 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7393 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7394 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7395 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7396 #define elf_backend_fake_sections ppc_elf_fake_sections
7397 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7398 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7399 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7400 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7401 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7402 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7403 #define elf_backend_write_section ppc_elf_write_section
7404 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7405 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7406 #define elf_backend_action_discarded ppc_elf_action_discarded
7407
7408 #include "elf32-target.h"
7409
7410 /* VxWorks Target */
7411
7412 #undef TARGET_LITTLE_SYM
7413 #undef TARGET_LITTLE_NAME
7414
7415 #undef TARGET_BIG_SYM
7416 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7417 #undef TARGET_BIG_NAME
7418 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7419
7420 /* VxWorks uses the elf default section flags for .plt. */
7421 static const struct bfd_elf_special_section *
7422 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7423 {
7424 if (sec->name == NULL)
7425 return NULL;
7426
7427 if (strcmp (sec->name, ".plt") == 0)
7428 return _bfd_elf_get_sec_type_attr (abfd, sec);
7429
7430 return ppc_elf_get_sec_type_attr (abfd, sec);
7431 }
7432
7433 /* Like ppc_elf_link_hash_table_create, but overrides
7434 appropriately for VxWorks. */
7435 static struct bfd_link_hash_table *
7436 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7437 {
7438 struct bfd_link_hash_table *ret;
7439
7440 ret = ppc_elf_link_hash_table_create (abfd);
7441 if (ret)
7442 {
7443 struct ppc_elf_link_hash_table *htab
7444 = (struct ppc_elf_link_hash_table *)ret;
7445 htab->is_vxworks = 1;
7446 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7447 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7448 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7449 }
7450 return ret;
7451 }
7452
7453 /* Tweak magic VxWorks symbols as they are loaded. */
7454 static bfd_boolean
7455 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7456 struct bfd_link_info *info,
7457 Elf_Internal_Sym *sym,
7458 const char **namep ATTRIBUTE_UNUSED,
7459 flagword *flagsp ATTRIBUTE_UNUSED,
7460 asection **secp,
7461 bfd_vma *valp)
7462 {
7463 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7464 valp))
7465 return FALSE;
7466
7467 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7468 }
7469
7470 /* Tweak magic VxWorks symbols as they are written to the output file. */
7471 static bfd_boolean
7472 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
7473 ATTRIBUTE_UNUSED,
7474 const char *name,
7475 Elf_Internal_Sym *sym,
7476 asection *input_sec ATTRIBUTE_UNUSED,
7477 struct elf_link_hash_entry *h
7478 ATTRIBUTE_UNUSED)
7479 {
7480 /* Ignore the first dummy symbol. */
7481 if (!name)
7482 return TRUE;
7483
7484 return elf_vxworks_link_output_symbol_hook (name, sym);
7485 }
7486
7487 static void
7488 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7489 {
7490 ppc_elf_final_write_processing(abfd, linker);
7491 elf_vxworks_final_write_processing(abfd, linker);
7492 }
7493
7494 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7495 define it. */
7496 #undef elf_backend_want_plt_sym
7497 #define elf_backend_want_plt_sym 1
7498 #undef elf_backend_want_got_plt
7499 #define elf_backend_want_got_plt 1
7500 #undef elf_backend_got_symbol_offset
7501 #define elf_backend_got_symbol_offset 0
7502 #undef elf_backend_plt_not_loaded
7503 #define elf_backend_plt_not_loaded 0
7504 #undef elf_backend_plt_readonly
7505 #define elf_backend_plt_readonly 1
7506 #undef elf_backend_got_header_size
7507 #define elf_backend_got_header_size 12
7508
7509 #undef bfd_elf32_bfd_link_hash_table_create
7510 #define bfd_elf32_bfd_link_hash_table_create \
7511 ppc_elf_vxworks_link_hash_table_create
7512 #undef elf_backend_add_symbol_hook
7513 #define elf_backend_add_symbol_hook \
7514 ppc_elf_vxworks_add_symbol_hook
7515 #undef elf_backend_link_output_symbol_hook
7516 #define elf_backend_link_output_symbol_hook \
7517 elf_i386_vxworks_link_output_symbol_hook
7518 #undef elf_backend_final_write_processing
7519 #define elf_backend_final_write_processing \
7520 ppc_elf_vxworks_final_write_processing
7521 #undef elf_backend_get_sec_type_attr
7522 #define elf_backend_get_sec_type_attr \
7523 ppc_elf_vxworks_get_sec_type_attr
7524 #undef elf_backend_emit_relocs
7525 #define elf_backend_emit_relocs \
7526 elf_vxworks_emit_relocs
7527
7528 #undef elf32_bed
7529 #define elf32_bed ppc_elf_vxworks_bed
7530
7531 #include "elf32-target.h"
GDB Binutils - Deliverables
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