Revert the value change of DT_ENCODING from 2003-01-17. Luckily (and
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007 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 <stdarg.h>
29 #include "bfd.h"
30 #include "sysdep.h"
31 #include "bfdlink.h"
32 #include "libbfd.h"
33 #include "elf-bfd.h"
34 #include "elf/ppc.h"
35 #include "elf32-ppc.h"
36 #include "elf-vxworks.h"
37
38 /* RELA relocations are used here. */
39
40 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
41 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
42 static bfd_reloc_status_type ppc_elf_unhandled_reloc
43 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
44
45 /* Branch prediction bit for branch taken relocs. */
46 #define BRANCH_PREDICT_BIT 0x200000
47 /* Mask to set RA in memory instructions. */
48 #define RA_REGISTER_MASK 0x001f0000
49 /* Value to shift register by to insert RA. */
50 #define RA_REGISTER_SHIFT 16
51
52 /* The name of the dynamic interpreter. This is put in the .interp
53 section. */
54 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
55
56 /* For old-style PLT. */
57 /* The number of single-slot PLT entries (the rest use two slots). */
58 #define PLT_NUM_SINGLE_ENTRIES 8192
59
60 /* For new-style .glink and .plt. */
61 #define GLINK_PLTRESOLVE 16*4
62 #define GLINK_ENTRY_SIZE 4*4
63
64 /* VxWorks uses its own plt layout, filled in by the static linker. */
65
66 /* The standard VxWorks PLT entry. */
67 #define VXWORKS_PLT_ENTRY_SIZE 32
68 static const bfd_vma ppc_elf_vxworks_plt_entry
69 [VXWORKS_PLT_ENTRY_SIZE / 4] =
70 {
71 0x3d800000, /* lis r12,0 */
72 0x818c0000, /* lwz r12,0(r12) */
73 0x7d8903a6, /* mtctr r12 */
74 0x4e800420, /* bctr */
75 0x39600000, /* li r11,0 */
76 0x48000000, /* b 14 <.PLT0resolve+0x4> */
77 0x60000000, /* nop */
78 0x60000000, /* nop */
79 };
80 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
81 [VXWORKS_PLT_ENTRY_SIZE / 4] =
82 {
83 0x3d9e0000, /* addis r12,r30,0 */
84 0x818c0000, /* lwz r12,0(r12) */
85 0x7d8903a6, /* mtctr r12 */
86 0x4e800420, /* bctr */
87 0x39600000, /* li r11,0 */
88 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
89 0x60000000, /* nop */
90 0x60000000, /* nop */
91 };
92
93 /* The initial VxWorks PLT entry. */
94 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
95 static const bfd_vma ppc_elf_vxworks_plt0_entry
96 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
97 {
98 0x3d800000, /* lis r12,0 */
99 0x398c0000, /* addi r12,r12,0 */
100 0x800c0008, /* lwz r0,8(r12) */
101 0x7c0903a6, /* mtctr r0 */
102 0x818c0004, /* lwz r12,4(r12) */
103 0x4e800420, /* bctr */
104 0x60000000, /* nop */
105 0x60000000, /* nop */
106 };
107 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
108 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
109 {
110 0x819e0008, /* lwz r12,8(r30) */
111 0x7d8903a6, /* mtctr r12 */
112 0x819e0004, /* lwz r12,4(r30) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 };
119
120 /* For executables, we have some additional relocations in
121 .rela.plt.unloaded, for the kernel loader. */
122
123 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
124 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
125 /* The number of relocations in the PLTResolve slot. */
126 #define VXWORKS_PLTRESOLVE_RELOCS 2
127 /* The number of relocations in the PLTResolve slot when when creating
128 a shared library. */
129 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
130
131 /* Some instructions. */
132 #define ADDIS_11_11 0x3d6b0000
133 #define ADDIS_11_30 0x3d7e0000
134 #define ADDIS_12_12 0x3d8c0000
135 #define ADDI_11_11 0x396b0000
136 #define ADD_0_11_11 0x7c0b5a14
137 #define ADD_11_0_11 0x7d605a14
138 #define B 0x48000000
139 #define BCL_20_31 0x429f0005
140 #define BCTR 0x4e800420
141 #define LIS_11 0x3d600000
142 #define LIS_12 0x3d800000
143 #define LWZU_0_12 0x840c0000
144 #define LWZ_0_12 0x800c0000
145 #define LWZ_11_11 0x816b0000
146 #define LWZ_11_30 0x817e0000
147 #define LWZ_12_12 0x818c0000
148 #define MFLR_0 0x7c0802a6
149 #define MFLR_12 0x7d8802a6
150 #define MTCTR_0 0x7c0903a6
151 #define MTCTR_11 0x7d6903a6
152 #define MTLR_0 0x7c0803a6
153 #define NOP 0x60000000
154 #define SUB_11_11_12 0x7d6c5850
155
156 /* Offset of tp and dtp pointers from start of TLS block. */
157 #define TP_OFFSET 0x7000
158 #define DTP_OFFSET 0x8000
159 \f
160 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
161
162 static reloc_howto_type ppc_elf_howto_raw[] = {
163 /* This reloc does nothing. */
164 HOWTO (R_PPC_NONE, /* type */
165 0, /* rightshift */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
167 32, /* bitsize */
168 FALSE, /* pc_relative */
169 0, /* bitpos */
170 complain_overflow_bitfield, /* complain_on_overflow */
171 bfd_elf_generic_reloc, /* special_function */
172 "R_PPC_NONE", /* name */
173 FALSE, /* partial_inplace */
174 0, /* src_mask */
175 0, /* dst_mask */
176 FALSE), /* pcrel_offset */
177
178 /* A standard 32 bit relocation. */
179 HOWTO (R_PPC_ADDR32, /* type */
180 0, /* rightshift */
181 2, /* size (0 = byte, 1 = short, 2 = long) */
182 32, /* bitsize */
183 FALSE, /* pc_relative */
184 0, /* bitpos */
185 complain_overflow_bitfield, /* complain_on_overflow */
186 bfd_elf_generic_reloc, /* special_function */
187 "R_PPC_ADDR32", /* name */
188 FALSE, /* partial_inplace */
189 0, /* src_mask */
190 0xffffffff, /* dst_mask */
191 FALSE), /* pcrel_offset */
192
193 /* An absolute 26 bit branch; the lower two bits must be zero.
194 FIXME: we don't check that, we just clear them. */
195 HOWTO (R_PPC_ADDR24, /* type */
196 0, /* rightshift */
197 2, /* size (0 = byte, 1 = short, 2 = long) */
198 26, /* bitsize */
199 FALSE, /* pc_relative */
200 0, /* bitpos */
201 complain_overflow_bitfield, /* complain_on_overflow */
202 bfd_elf_generic_reloc, /* special_function */
203 "R_PPC_ADDR24", /* name */
204 FALSE, /* partial_inplace */
205 0, /* src_mask */
206 0x3fffffc, /* dst_mask */
207 FALSE), /* pcrel_offset */
208
209 /* A standard 16 bit relocation. */
210 HOWTO (R_PPC_ADDR16, /* type */
211 0, /* rightshift */
212 1, /* size (0 = byte, 1 = short, 2 = long) */
213 16, /* bitsize */
214 FALSE, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_bitfield, /* complain_on_overflow */
217 bfd_elf_generic_reloc, /* special_function */
218 "R_PPC_ADDR16", /* name */
219 FALSE, /* partial_inplace */
220 0, /* src_mask */
221 0xffff, /* dst_mask */
222 FALSE), /* pcrel_offset */
223
224 /* A 16 bit relocation without overflow. */
225 HOWTO (R_PPC_ADDR16_LO, /* type */
226 0, /* rightshift */
227 1, /* size (0 = byte, 1 = short, 2 = long) */
228 16, /* bitsize */
229 FALSE, /* pc_relative */
230 0, /* bitpos */
231 complain_overflow_dont,/* complain_on_overflow */
232 bfd_elf_generic_reloc, /* special_function */
233 "R_PPC_ADDR16_LO", /* name */
234 FALSE, /* partial_inplace */
235 0, /* src_mask */
236 0xffff, /* dst_mask */
237 FALSE), /* pcrel_offset */
238
239 /* The high order 16 bits of an address. */
240 HOWTO (R_PPC_ADDR16_HI, /* type */
241 16, /* rightshift */
242 1, /* size (0 = byte, 1 = short, 2 = long) */
243 16, /* bitsize */
244 FALSE, /* pc_relative */
245 0, /* bitpos */
246 complain_overflow_dont, /* complain_on_overflow */
247 bfd_elf_generic_reloc, /* special_function */
248 "R_PPC_ADDR16_HI", /* name */
249 FALSE, /* partial_inplace */
250 0, /* src_mask */
251 0xffff, /* dst_mask */
252 FALSE), /* pcrel_offset */
253
254 /* The high order 16 bits of an address, plus 1 if the contents of
255 the low 16 bits, treated as a signed number, is negative. */
256 HOWTO (R_PPC_ADDR16_HA, /* type */
257 16, /* rightshift */
258 1, /* size (0 = byte, 1 = short, 2 = long) */
259 16, /* bitsize */
260 FALSE, /* pc_relative */
261 0, /* bitpos */
262 complain_overflow_dont, /* complain_on_overflow */
263 ppc_elf_addr16_ha_reloc, /* special_function */
264 "R_PPC_ADDR16_HA", /* name */
265 FALSE, /* partial_inplace */
266 0, /* src_mask */
267 0xffff, /* dst_mask */
268 FALSE), /* pcrel_offset */
269
270 /* An absolute 16 bit branch; the lower two bits must be zero.
271 FIXME: we don't check that, we just clear them. */
272 HOWTO (R_PPC_ADDR14, /* type */
273 0, /* rightshift */
274 2, /* size (0 = byte, 1 = short, 2 = long) */
275 16, /* bitsize */
276 FALSE, /* pc_relative */
277 0, /* bitpos */
278 complain_overflow_bitfield, /* complain_on_overflow */
279 bfd_elf_generic_reloc, /* special_function */
280 "R_PPC_ADDR14", /* name */
281 FALSE, /* partial_inplace */
282 0, /* src_mask */
283 0xfffc, /* dst_mask */
284 FALSE), /* pcrel_offset */
285
286 /* An absolute 16 bit branch, for which bit 10 should be set to
287 indicate that the branch is expected to be taken. The lower two
288 bits must be zero. */
289 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
290 0, /* rightshift */
291 2, /* size (0 = byte, 1 = short, 2 = long) */
292 16, /* bitsize */
293 FALSE, /* pc_relative */
294 0, /* bitpos */
295 complain_overflow_bitfield, /* complain_on_overflow */
296 bfd_elf_generic_reloc, /* special_function */
297 "R_PPC_ADDR14_BRTAKEN",/* name */
298 FALSE, /* partial_inplace */
299 0, /* src_mask */
300 0xfffc, /* dst_mask */
301 FALSE), /* pcrel_offset */
302
303 /* An absolute 16 bit branch, for which bit 10 should be set to
304 indicate that the branch is not expected to be taken. The lower
305 two bits must be zero. */
306 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
307 0, /* rightshift */
308 2, /* size (0 = byte, 1 = short, 2 = long) */
309 16, /* bitsize */
310 FALSE, /* pc_relative */
311 0, /* bitpos */
312 complain_overflow_bitfield, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_PPC_ADDR14_BRNTAKEN",/* name */
315 FALSE, /* partial_inplace */
316 0, /* src_mask */
317 0xfffc, /* dst_mask */
318 FALSE), /* pcrel_offset */
319
320 /* A relative 26 bit branch; the lower two bits must be zero. */
321 HOWTO (R_PPC_REL24, /* type */
322 0, /* rightshift */
323 2, /* size (0 = byte, 1 = short, 2 = long) */
324 26, /* bitsize */
325 TRUE, /* pc_relative */
326 0, /* bitpos */
327 complain_overflow_signed, /* complain_on_overflow */
328 bfd_elf_generic_reloc, /* special_function */
329 "R_PPC_REL24", /* name */
330 FALSE, /* partial_inplace */
331 0, /* src_mask */
332 0x3fffffc, /* dst_mask */
333 TRUE), /* pcrel_offset */
334
335 /* A relative 16 bit branch; the lower two bits must be zero. */
336 HOWTO (R_PPC_REL14, /* type */
337 0, /* rightshift */
338 2, /* size (0 = byte, 1 = short, 2 = long) */
339 16, /* bitsize */
340 TRUE, /* pc_relative */
341 0, /* bitpos */
342 complain_overflow_signed, /* complain_on_overflow */
343 bfd_elf_generic_reloc, /* special_function */
344 "R_PPC_REL14", /* name */
345 FALSE, /* partial_inplace */
346 0, /* src_mask */
347 0xfffc, /* dst_mask */
348 TRUE), /* pcrel_offset */
349
350 /* A relative 16 bit branch. Bit 10 should be set to indicate that
351 the branch is expected to be taken. The lower two bits must be
352 zero. */
353 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
354 0, /* rightshift */
355 2, /* size (0 = byte, 1 = short, 2 = long) */
356 16, /* bitsize */
357 TRUE, /* pc_relative */
358 0, /* bitpos */
359 complain_overflow_signed, /* complain_on_overflow */
360 bfd_elf_generic_reloc, /* special_function */
361 "R_PPC_REL14_BRTAKEN", /* name */
362 FALSE, /* partial_inplace */
363 0, /* src_mask */
364 0xfffc, /* dst_mask */
365 TRUE), /* pcrel_offset */
366
367 /* A relative 16 bit branch. Bit 10 should be set to indicate that
368 the branch is not expected to be taken. The lower two bits must
369 be zero. */
370 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
371 0, /* rightshift */
372 2, /* size (0 = byte, 1 = short, 2 = long) */
373 16, /* bitsize */
374 TRUE, /* pc_relative */
375 0, /* bitpos */
376 complain_overflow_signed, /* complain_on_overflow */
377 bfd_elf_generic_reloc, /* special_function */
378 "R_PPC_REL14_BRNTAKEN",/* name */
379 FALSE, /* partial_inplace */
380 0, /* src_mask */
381 0xfffc, /* dst_mask */
382 TRUE), /* pcrel_offset */
383
384 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
385 symbol. */
386 HOWTO (R_PPC_GOT16, /* type */
387 0, /* rightshift */
388 1, /* size (0 = byte, 1 = short, 2 = long) */
389 16, /* bitsize */
390 FALSE, /* pc_relative */
391 0, /* bitpos */
392 complain_overflow_signed, /* complain_on_overflow */
393 bfd_elf_generic_reloc, /* special_function */
394 "R_PPC_GOT16", /* name */
395 FALSE, /* partial_inplace */
396 0, /* src_mask */
397 0xffff, /* dst_mask */
398 FALSE), /* pcrel_offset */
399
400 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
401 the symbol. */
402 HOWTO (R_PPC_GOT16_LO, /* type */
403 0, /* rightshift */
404 1, /* size (0 = byte, 1 = short, 2 = long) */
405 16, /* bitsize */
406 FALSE, /* pc_relative */
407 0, /* bitpos */
408 complain_overflow_dont, /* complain_on_overflow */
409 bfd_elf_generic_reloc, /* special_function */
410 "R_PPC_GOT16_LO", /* name */
411 FALSE, /* partial_inplace */
412 0, /* src_mask */
413 0xffff, /* dst_mask */
414 FALSE), /* pcrel_offset */
415
416 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
417 the symbol. */
418 HOWTO (R_PPC_GOT16_HI, /* type */
419 16, /* rightshift */
420 1, /* size (0 = byte, 1 = short, 2 = long) */
421 16, /* bitsize */
422 FALSE, /* pc_relative */
423 0, /* bitpos */
424 complain_overflow_bitfield, /* complain_on_overflow */
425 bfd_elf_generic_reloc, /* special_function */
426 "R_PPC_GOT16_HI", /* name */
427 FALSE, /* partial_inplace */
428 0, /* src_mask */
429 0xffff, /* dst_mask */
430 FALSE), /* pcrel_offset */
431
432 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
433 the symbol. */
434 HOWTO (R_PPC_GOT16_HA, /* type */
435 16, /* rightshift */
436 1, /* size (0 = byte, 1 = short, 2 = long) */
437 16, /* bitsize */
438 FALSE, /* pc_relative */
439 0, /* bitpos */
440 complain_overflow_bitfield, /* complain_on_overflow */
441 ppc_elf_addr16_ha_reloc, /* special_function */
442 "R_PPC_GOT16_HA", /* name */
443 FALSE, /* partial_inplace */
444 0, /* src_mask */
445 0xffff, /* dst_mask */
446 FALSE), /* pcrel_offset */
447
448 /* Like R_PPC_REL24, but referring to the procedure linkage table
449 entry for the symbol. */
450 HOWTO (R_PPC_PLTREL24, /* type */
451 0, /* rightshift */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
453 26, /* bitsize */
454 TRUE, /* pc_relative */
455 0, /* bitpos */
456 complain_overflow_signed, /* complain_on_overflow */
457 bfd_elf_generic_reloc, /* special_function */
458 "R_PPC_PLTREL24", /* name */
459 FALSE, /* partial_inplace */
460 0, /* src_mask */
461 0x3fffffc, /* dst_mask */
462 TRUE), /* pcrel_offset */
463
464 /* This is used only by the dynamic linker. The symbol should exist
465 both in the object being run and in some shared library. The
466 dynamic linker copies the data addressed by the symbol from the
467 shared library into the object, because the object being
468 run has to have the data at some particular address. */
469 HOWTO (R_PPC_COPY, /* type */
470 0, /* rightshift */
471 2, /* size (0 = byte, 1 = short, 2 = long) */
472 32, /* bitsize */
473 FALSE, /* pc_relative */
474 0, /* bitpos */
475 complain_overflow_bitfield, /* complain_on_overflow */
476 bfd_elf_generic_reloc, /* special_function */
477 "R_PPC_COPY", /* name */
478 FALSE, /* partial_inplace */
479 0, /* src_mask */
480 0, /* dst_mask */
481 FALSE), /* pcrel_offset */
482
483 /* Like R_PPC_ADDR32, but used when setting global offset table
484 entries. */
485 HOWTO (R_PPC_GLOB_DAT, /* type */
486 0, /* rightshift */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
488 32, /* bitsize */
489 FALSE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_bitfield, /* complain_on_overflow */
492 bfd_elf_generic_reloc, /* special_function */
493 "R_PPC_GLOB_DAT", /* name */
494 FALSE, /* partial_inplace */
495 0, /* src_mask */
496 0xffffffff, /* dst_mask */
497 FALSE), /* pcrel_offset */
498
499 /* Marks a procedure linkage table entry for a symbol. */
500 HOWTO (R_PPC_JMP_SLOT, /* type */
501 0, /* rightshift */
502 2, /* size (0 = byte, 1 = short, 2 = long) */
503 32, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_bitfield, /* complain_on_overflow */
507 bfd_elf_generic_reloc, /* special_function */
508 "R_PPC_JMP_SLOT", /* name */
509 FALSE, /* partial_inplace */
510 0, /* src_mask */
511 0, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Used only by the dynamic linker. When the object is run, this
515 longword is set to the load address of the object, plus the
516 addend. */
517 HOWTO (R_PPC_RELATIVE, /* type */
518 0, /* rightshift */
519 2, /* size (0 = byte, 1 = short, 2 = long) */
520 32, /* bitsize */
521 FALSE, /* pc_relative */
522 0, /* bitpos */
523 complain_overflow_bitfield, /* complain_on_overflow */
524 bfd_elf_generic_reloc, /* special_function */
525 "R_PPC_RELATIVE", /* name */
526 FALSE, /* partial_inplace */
527 0, /* src_mask */
528 0xffffffff, /* dst_mask */
529 FALSE), /* pcrel_offset */
530
531 /* Like R_PPC_REL24, but uses the value of the symbol within the
532 object rather than the final value. Normally used for
533 _GLOBAL_OFFSET_TABLE_. */
534 HOWTO (R_PPC_LOCAL24PC, /* type */
535 0, /* rightshift */
536 2, /* size (0 = byte, 1 = short, 2 = long) */
537 26, /* bitsize */
538 TRUE, /* pc_relative */
539 0, /* bitpos */
540 complain_overflow_signed, /* complain_on_overflow */
541 bfd_elf_generic_reloc, /* special_function */
542 "R_PPC_LOCAL24PC", /* name */
543 FALSE, /* partial_inplace */
544 0, /* src_mask */
545 0x3fffffc, /* dst_mask */
546 TRUE), /* pcrel_offset */
547
548 /* Like R_PPC_ADDR32, but may be unaligned. */
549 HOWTO (R_PPC_UADDR32, /* type */
550 0, /* rightshift */
551 2, /* size (0 = byte, 1 = short, 2 = long) */
552 32, /* bitsize */
553 FALSE, /* pc_relative */
554 0, /* bitpos */
555 complain_overflow_bitfield, /* complain_on_overflow */
556 bfd_elf_generic_reloc, /* special_function */
557 "R_PPC_UADDR32", /* name */
558 FALSE, /* partial_inplace */
559 0, /* src_mask */
560 0xffffffff, /* dst_mask */
561 FALSE), /* pcrel_offset */
562
563 /* Like R_PPC_ADDR16, but may be unaligned. */
564 HOWTO (R_PPC_UADDR16, /* type */
565 0, /* rightshift */
566 1, /* size (0 = byte, 1 = short, 2 = long) */
567 16, /* bitsize */
568 FALSE, /* pc_relative */
569 0, /* bitpos */
570 complain_overflow_bitfield, /* complain_on_overflow */
571 bfd_elf_generic_reloc, /* special_function */
572 "R_PPC_UADDR16", /* name */
573 FALSE, /* partial_inplace */
574 0, /* src_mask */
575 0xffff, /* dst_mask */
576 FALSE), /* pcrel_offset */
577
578 /* 32-bit PC relative */
579 HOWTO (R_PPC_REL32, /* type */
580 0, /* rightshift */
581 2, /* size (0 = byte, 1 = short, 2 = long) */
582 32, /* bitsize */
583 TRUE, /* pc_relative */
584 0, /* bitpos */
585 complain_overflow_bitfield, /* complain_on_overflow */
586 bfd_elf_generic_reloc, /* special_function */
587 "R_PPC_REL32", /* name */
588 FALSE, /* partial_inplace */
589 0, /* src_mask */
590 0xffffffff, /* dst_mask */
591 TRUE), /* pcrel_offset */
592
593 /* 32-bit relocation to the symbol's procedure linkage table.
594 FIXME: not supported. */
595 HOWTO (R_PPC_PLT32, /* type */
596 0, /* rightshift */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
598 32, /* bitsize */
599 FALSE, /* pc_relative */
600 0, /* bitpos */
601 complain_overflow_bitfield, /* complain_on_overflow */
602 bfd_elf_generic_reloc, /* special_function */
603 "R_PPC_PLT32", /* name */
604 FALSE, /* partial_inplace */
605 0, /* src_mask */
606 0, /* dst_mask */
607 FALSE), /* pcrel_offset */
608
609 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
610 FIXME: not supported. */
611 HOWTO (R_PPC_PLTREL32, /* type */
612 0, /* rightshift */
613 2, /* size (0 = byte, 1 = short, 2 = long) */
614 32, /* bitsize */
615 TRUE, /* pc_relative */
616 0, /* bitpos */
617 complain_overflow_bitfield, /* complain_on_overflow */
618 bfd_elf_generic_reloc, /* special_function */
619 "R_PPC_PLTREL32", /* name */
620 FALSE, /* partial_inplace */
621 0, /* src_mask */
622 0, /* dst_mask */
623 TRUE), /* pcrel_offset */
624
625 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
626 the symbol. */
627 HOWTO (R_PPC_PLT16_LO, /* type */
628 0, /* rightshift */
629 1, /* size (0 = byte, 1 = short, 2 = long) */
630 16, /* bitsize */
631 FALSE, /* pc_relative */
632 0, /* bitpos */
633 complain_overflow_dont, /* complain_on_overflow */
634 bfd_elf_generic_reloc, /* special_function */
635 "R_PPC_PLT16_LO", /* name */
636 FALSE, /* partial_inplace */
637 0, /* src_mask */
638 0xffff, /* dst_mask */
639 FALSE), /* pcrel_offset */
640
641 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
642 the symbol. */
643 HOWTO (R_PPC_PLT16_HI, /* type */
644 16, /* rightshift */
645 1, /* size (0 = byte, 1 = short, 2 = long) */
646 16, /* bitsize */
647 FALSE, /* pc_relative */
648 0, /* bitpos */
649 complain_overflow_bitfield, /* complain_on_overflow */
650 bfd_elf_generic_reloc, /* special_function */
651 "R_PPC_PLT16_HI", /* name */
652 FALSE, /* partial_inplace */
653 0, /* src_mask */
654 0xffff, /* dst_mask */
655 FALSE), /* pcrel_offset */
656
657 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
658 the symbol. */
659 HOWTO (R_PPC_PLT16_HA, /* type */
660 16, /* rightshift */
661 1, /* size (0 = byte, 1 = short, 2 = long) */
662 16, /* bitsize */
663 FALSE, /* pc_relative */
664 0, /* bitpos */
665 complain_overflow_bitfield, /* complain_on_overflow */
666 ppc_elf_addr16_ha_reloc, /* special_function */
667 "R_PPC_PLT16_HA", /* name */
668 FALSE, /* partial_inplace */
669 0, /* src_mask */
670 0xffff, /* dst_mask */
671 FALSE), /* pcrel_offset */
672
673 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
674 small data items. */
675 HOWTO (R_PPC_SDAREL16, /* type */
676 0, /* rightshift */
677 1, /* size (0 = byte, 1 = short, 2 = long) */
678 16, /* bitsize */
679 FALSE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_signed, /* complain_on_overflow */
682 bfd_elf_generic_reloc, /* special_function */
683 "R_PPC_SDAREL16", /* name */
684 FALSE, /* partial_inplace */
685 0, /* src_mask */
686 0xffff, /* dst_mask */
687 FALSE), /* pcrel_offset */
688
689 /* 16-bit section relative relocation. */
690 HOWTO (R_PPC_SECTOFF, /* type */
691 0, /* rightshift */
692 1, /* size (0 = byte, 1 = short, 2 = long) */
693 16, /* bitsize */
694 FALSE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_bitfield, /* complain_on_overflow */
697 bfd_elf_generic_reloc, /* special_function */
698 "R_PPC_SECTOFF", /* name */
699 FALSE, /* partial_inplace */
700 0, /* src_mask */
701 0xffff, /* dst_mask */
702 FALSE), /* pcrel_offset */
703
704 /* 16-bit lower half section relative relocation. */
705 HOWTO (R_PPC_SECTOFF_LO, /* type */
706 0, /* rightshift */
707 1, /* size (0 = byte, 1 = short, 2 = long) */
708 16, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_dont, /* complain_on_overflow */
712 bfd_elf_generic_reloc, /* special_function */
713 "R_PPC_SECTOFF_LO", /* name */
714 FALSE, /* partial_inplace */
715 0, /* src_mask */
716 0xffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718
719 /* 16-bit upper half section relative relocation. */
720 HOWTO (R_PPC_SECTOFF_HI, /* type */
721 16, /* rightshift */
722 1, /* size (0 = byte, 1 = short, 2 = long) */
723 16, /* bitsize */
724 FALSE, /* pc_relative */
725 0, /* bitpos */
726 complain_overflow_bitfield, /* complain_on_overflow */
727 bfd_elf_generic_reloc, /* special_function */
728 "R_PPC_SECTOFF_HI", /* name */
729 FALSE, /* partial_inplace */
730 0, /* src_mask */
731 0xffff, /* dst_mask */
732 FALSE), /* pcrel_offset */
733
734 /* 16-bit upper half adjusted section relative relocation. */
735 HOWTO (R_PPC_SECTOFF_HA, /* type */
736 16, /* rightshift */
737 1, /* size (0 = byte, 1 = short, 2 = long) */
738 16, /* bitsize */
739 FALSE, /* pc_relative */
740 0, /* bitpos */
741 complain_overflow_bitfield, /* complain_on_overflow */
742 ppc_elf_addr16_ha_reloc, /* special_function */
743 "R_PPC_SECTOFF_HA", /* name */
744 FALSE, /* partial_inplace */
745 0, /* src_mask */
746 0xffff, /* dst_mask */
747 FALSE), /* pcrel_offset */
748
749 /* Marker reloc for TLS. */
750 HOWTO (R_PPC_TLS,
751 0, /* rightshift */
752 2, /* size (0 = byte, 1 = short, 2 = long) */
753 32, /* bitsize */
754 FALSE, /* pc_relative */
755 0, /* bitpos */
756 complain_overflow_dont, /* complain_on_overflow */
757 bfd_elf_generic_reloc, /* special_function */
758 "R_PPC_TLS", /* name */
759 FALSE, /* partial_inplace */
760 0, /* src_mask */
761 0, /* dst_mask */
762 FALSE), /* pcrel_offset */
763
764 /* Computes the load module index of the load module that contains the
765 definition of its TLS sym. */
766 HOWTO (R_PPC_DTPMOD32,
767 0, /* rightshift */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
769 32, /* bitsize */
770 FALSE, /* pc_relative */
771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 ppc_elf_unhandled_reloc, /* special_function */
774 "R_PPC_DTPMOD32", /* name */
775 FALSE, /* partial_inplace */
776 0, /* src_mask */
777 0xffffffff, /* dst_mask */
778 FALSE), /* pcrel_offset */
779
780 /* Computes a dtv-relative displacement, the difference between the value
781 of sym+add and the base address of the thread-local storage block that
782 contains the definition of sym, minus 0x8000. */
783 HOWTO (R_PPC_DTPREL32,
784 0, /* rightshift */
785 2, /* size (0 = byte, 1 = short, 2 = long) */
786 32, /* bitsize */
787 FALSE, /* pc_relative */
788 0, /* bitpos */
789 complain_overflow_dont, /* complain_on_overflow */
790 ppc_elf_unhandled_reloc, /* special_function */
791 "R_PPC_DTPREL32", /* name */
792 FALSE, /* partial_inplace */
793 0, /* src_mask */
794 0xffffffff, /* dst_mask */
795 FALSE), /* pcrel_offset */
796
797 /* A 16 bit dtprel reloc. */
798 HOWTO (R_PPC_DTPREL16,
799 0, /* rightshift */
800 1, /* size (0 = byte, 1 = short, 2 = long) */
801 16, /* bitsize */
802 FALSE, /* pc_relative */
803 0, /* bitpos */
804 complain_overflow_signed, /* complain_on_overflow */
805 ppc_elf_unhandled_reloc, /* special_function */
806 "R_PPC_DTPREL16", /* name */
807 FALSE, /* partial_inplace */
808 0, /* src_mask */
809 0xffff, /* dst_mask */
810 FALSE), /* pcrel_offset */
811
812 /* Like DTPREL16, but no overflow. */
813 HOWTO (R_PPC_DTPREL16_LO,
814 0, /* rightshift */
815 1, /* size (0 = byte, 1 = short, 2 = long) */
816 16, /* bitsize */
817 FALSE, /* pc_relative */
818 0, /* bitpos */
819 complain_overflow_dont, /* complain_on_overflow */
820 ppc_elf_unhandled_reloc, /* special_function */
821 "R_PPC_DTPREL16_LO", /* name */
822 FALSE, /* partial_inplace */
823 0, /* src_mask */
824 0xffff, /* dst_mask */
825 FALSE), /* pcrel_offset */
826
827 /* Like DTPREL16_LO, but next higher group of 16 bits. */
828 HOWTO (R_PPC_DTPREL16_HI,
829 16, /* rightshift */
830 1, /* size (0 = byte, 1 = short, 2 = long) */
831 16, /* bitsize */
832 FALSE, /* pc_relative */
833 0, /* bitpos */
834 complain_overflow_dont, /* complain_on_overflow */
835 ppc_elf_unhandled_reloc, /* special_function */
836 "R_PPC_DTPREL16_HI", /* name */
837 FALSE, /* partial_inplace */
838 0, /* src_mask */
839 0xffff, /* dst_mask */
840 FALSE), /* pcrel_offset */
841
842 /* Like DTPREL16_HI, but adjust for low 16 bits. */
843 HOWTO (R_PPC_DTPREL16_HA,
844 16, /* rightshift */
845 1, /* size (0 = byte, 1 = short, 2 = long) */
846 16, /* bitsize */
847 FALSE, /* pc_relative */
848 0, /* bitpos */
849 complain_overflow_dont, /* complain_on_overflow */
850 ppc_elf_unhandled_reloc, /* special_function */
851 "R_PPC_DTPREL16_HA", /* name */
852 FALSE, /* partial_inplace */
853 0, /* src_mask */
854 0xffff, /* dst_mask */
855 FALSE), /* pcrel_offset */
856
857 /* Computes a tp-relative displacement, the difference between the value of
858 sym+add and the value of the thread pointer (r13). */
859 HOWTO (R_PPC_TPREL32,
860 0, /* rightshift */
861 2, /* size (0 = byte, 1 = short, 2 = long) */
862 32, /* bitsize */
863 FALSE, /* pc_relative */
864 0, /* bitpos */
865 complain_overflow_dont, /* complain_on_overflow */
866 ppc_elf_unhandled_reloc, /* special_function */
867 "R_PPC_TPREL32", /* name */
868 FALSE, /* partial_inplace */
869 0, /* src_mask */
870 0xffffffff, /* dst_mask */
871 FALSE), /* pcrel_offset */
872
873 /* A 16 bit tprel reloc. */
874 HOWTO (R_PPC_TPREL16,
875 0, /* rightshift */
876 1, /* size (0 = byte, 1 = short, 2 = long) */
877 16, /* bitsize */
878 FALSE, /* pc_relative */
879 0, /* bitpos */
880 complain_overflow_signed, /* complain_on_overflow */
881 ppc_elf_unhandled_reloc, /* special_function */
882 "R_PPC_TPREL16", /* name */
883 FALSE, /* partial_inplace */
884 0, /* src_mask */
885 0xffff, /* dst_mask */
886 FALSE), /* pcrel_offset */
887
888 /* Like TPREL16, but no overflow. */
889 HOWTO (R_PPC_TPREL16_LO,
890 0, /* rightshift */
891 1, /* size (0 = byte, 1 = short, 2 = long) */
892 16, /* bitsize */
893 FALSE, /* pc_relative */
894 0, /* bitpos */
895 complain_overflow_dont, /* complain_on_overflow */
896 ppc_elf_unhandled_reloc, /* special_function */
897 "R_PPC_TPREL16_LO", /* name */
898 FALSE, /* partial_inplace */
899 0, /* src_mask */
900 0xffff, /* dst_mask */
901 FALSE), /* pcrel_offset */
902
903 /* Like TPREL16_LO, but next higher group of 16 bits. */
904 HOWTO (R_PPC_TPREL16_HI,
905 16, /* rightshift */
906 1, /* size (0 = byte, 1 = short, 2 = long) */
907 16, /* bitsize */
908 FALSE, /* pc_relative */
909 0, /* bitpos */
910 complain_overflow_dont, /* complain_on_overflow */
911 ppc_elf_unhandled_reloc, /* special_function */
912 "R_PPC_TPREL16_HI", /* name */
913 FALSE, /* partial_inplace */
914 0, /* src_mask */
915 0xffff, /* dst_mask */
916 FALSE), /* pcrel_offset */
917
918 /* Like TPREL16_HI, but adjust for low 16 bits. */
919 HOWTO (R_PPC_TPREL16_HA,
920 16, /* rightshift */
921 1, /* size (0 = byte, 1 = short, 2 = long) */
922 16, /* bitsize */
923 FALSE, /* pc_relative */
924 0, /* bitpos */
925 complain_overflow_dont, /* complain_on_overflow */
926 ppc_elf_unhandled_reloc, /* special_function */
927 "R_PPC_TPREL16_HA", /* name */
928 FALSE, /* partial_inplace */
929 0, /* src_mask */
930 0xffff, /* dst_mask */
931 FALSE), /* pcrel_offset */
932
933 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
934 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
935 to the first entry. */
936 HOWTO (R_PPC_GOT_TLSGD16,
937 0, /* rightshift */
938 1, /* size (0 = byte, 1 = short, 2 = long) */
939 16, /* bitsize */
940 FALSE, /* pc_relative */
941 0, /* bitpos */
942 complain_overflow_signed, /* complain_on_overflow */
943 ppc_elf_unhandled_reloc, /* special_function */
944 "R_PPC_GOT_TLSGD16", /* name */
945 FALSE, /* partial_inplace */
946 0, /* src_mask */
947 0xffff, /* dst_mask */
948 FALSE), /* pcrel_offset */
949
950 /* Like GOT_TLSGD16, but no overflow. */
951 HOWTO (R_PPC_GOT_TLSGD16_LO,
952 0, /* rightshift */
953 1, /* size (0 = byte, 1 = short, 2 = long) */
954 16, /* bitsize */
955 FALSE, /* pc_relative */
956 0, /* bitpos */
957 complain_overflow_dont, /* complain_on_overflow */
958 ppc_elf_unhandled_reloc, /* special_function */
959 "R_PPC_GOT_TLSGD16_LO", /* name */
960 FALSE, /* partial_inplace */
961 0, /* src_mask */
962 0xffff, /* dst_mask */
963 FALSE), /* pcrel_offset */
964
965 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
966 HOWTO (R_PPC_GOT_TLSGD16_HI,
967 16, /* rightshift */
968 1, /* size (0 = byte, 1 = short, 2 = long) */
969 16, /* bitsize */
970 FALSE, /* pc_relative */
971 0, /* bitpos */
972 complain_overflow_dont, /* complain_on_overflow */
973 ppc_elf_unhandled_reloc, /* special_function */
974 "R_PPC_GOT_TLSGD16_HI", /* name */
975 FALSE, /* partial_inplace */
976 0, /* src_mask */
977 0xffff, /* dst_mask */
978 FALSE), /* pcrel_offset */
979
980 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
981 HOWTO (R_PPC_GOT_TLSGD16_HA,
982 16, /* rightshift */
983 1, /* size (0 = byte, 1 = short, 2 = long) */
984 16, /* bitsize */
985 FALSE, /* pc_relative */
986 0, /* bitpos */
987 complain_overflow_dont, /* complain_on_overflow */
988 ppc_elf_unhandled_reloc, /* special_function */
989 "R_PPC_GOT_TLSGD16_HA", /* name */
990 FALSE, /* partial_inplace */
991 0, /* src_mask */
992 0xffff, /* dst_mask */
993 FALSE), /* pcrel_offset */
994
995 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
996 with values (sym+add)@dtpmod and zero, and computes the offset to the
997 first entry. */
998 HOWTO (R_PPC_GOT_TLSLD16,
999 0, /* rightshift */
1000 1, /* size (0 = byte, 1 = short, 2 = long) */
1001 16, /* bitsize */
1002 FALSE, /* pc_relative */
1003 0, /* bitpos */
1004 complain_overflow_signed, /* complain_on_overflow */
1005 ppc_elf_unhandled_reloc, /* special_function */
1006 "R_PPC_GOT_TLSLD16", /* name */
1007 FALSE, /* partial_inplace */
1008 0, /* src_mask */
1009 0xffff, /* dst_mask */
1010 FALSE), /* pcrel_offset */
1011
1012 /* Like GOT_TLSLD16, but no overflow. */
1013 HOWTO (R_PPC_GOT_TLSLD16_LO,
1014 0, /* rightshift */
1015 1, /* size (0 = byte, 1 = short, 2 = long) */
1016 16, /* bitsize */
1017 FALSE, /* pc_relative */
1018 0, /* bitpos */
1019 complain_overflow_dont, /* complain_on_overflow */
1020 ppc_elf_unhandled_reloc, /* special_function */
1021 "R_PPC_GOT_TLSLD16_LO", /* name */
1022 FALSE, /* partial_inplace */
1023 0, /* src_mask */
1024 0xffff, /* dst_mask */
1025 FALSE), /* pcrel_offset */
1026
1027 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1028 HOWTO (R_PPC_GOT_TLSLD16_HI,
1029 16, /* rightshift */
1030 1, /* size (0 = byte, 1 = short, 2 = long) */
1031 16, /* bitsize */
1032 FALSE, /* pc_relative */
1033 0, /* bitpos */
1034 complain_overflow_dont, /* complain_on_overflow */
1035 ppc_elf_unhandled_reloc, /* special_function */
1036 "R_PPC_GOT_TLSLD16_HI", /* name */
1037 FALSE, /* partial_inplace */
1038 0, /* src_mask */
1039 0xffff, /* dst_mask */
1040 FALSE), /* pcrel_offset */
1041
1042 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1043 HOWTO (R_PPC_GOT_TLSLD16_HA,
1044 16, /* rightshift */
1045 1, /* size (0 = byte, 1 = short, 2 = long) */
1046 16, /* bitsize */
1047 FALSE, /* pc_relative */
1048 0, /* bitpos */
1049 complain_overflow_dont, /* complain_on_overflow */
1050 ppc_elf_unhandled_reloc, /* special_function */
1051 "R_PPC_GOT_TLSLD16_HA", /* name */
1052 FALSE, /* partial_inplace */
1053 0, /* src_mask */
1054 0xffff, /* dst_mask */
1055 FALSE), /* pcrel_offset */
1056
1057 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1058 the offset to the entry. */
1059 HOWTO (R_PPC_GOT_DTPREL16,
1060 0, /* rightshift */
1061 1, /* size (0 = byte, 1 = short, 2 = long) */
1062 16, /* bitsize */
1063 FALSE, /* pc_relative */
1064 0, /* bitpos */
1065 complain_overflow_signed, /* complain_on_overflow */
1066 ppc_elf_unhandled_reloc, /* special_function */
1067 "R_PPC_GOT_DTPREL16", /* name */
1068 FALSE, /* partial_inplace */
1069 0, /* src_mask */
1070 0xffff, /* dst_mask */
1071 FALSE), /* pcrel_offset */
1072
1073 /* Like GOT_DTPREL16, but no overflow. */
1074 HOWTO (R_PPC_GOT_DTPREL16_LO,
1075 0, /* rightshift */
1076 1, /* size (0 = byte, 1 = short, 2 = long) */
1077 16, /* bitsize */
1078 FALSE, /* pc_relative */
1079 0, /* bitpos */
1080 complain_overflow_dont, /* complain_on_overflow */
1081 ppc_elf_unhandled_reloc, /* special_function */
1082 "R_PPC_GOT_DTPREL16_LO", /* name */
1083 FALSE, /* partial_inplace */
1084 0, /* src_mask */
1085 0xffff, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1087
1088 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1089 HOWTO (R_PPC_GOT_DTPREL16_HI,
1090 16, /* rightshift */
1091 1, /* size (0 = byte, 1 = short, 2 = long) */
1092 16, /* bitsize */
1093 FALSE, /* pc_relative */
1094 0, /* bitpos */
1095 complain_overflow_dont, /* complain_on_overflow */
1096 ppc_elf_unhandled_reloc, /* special_function */
1097 "R_PPC_GOT_DTPREL16_HI", /* name */
1098 FALSE, /* partial_inplace */
1099 0, /* src_mask */
1100 0xffff, /* dst_mask */
1101 FALSE), /* pcrel_offset */
1102
1103 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1104 HOWTO (R_PPC_GOT_DTPREL16_HA,
1105 16, /* rightshift */
1106 1, /* size (0 = byte, 1 = short, 2 = long) */
1107 16, /* bitsize */
1108 FALSE, /* pc_relative */
1109 0, /* bitpos */
1110 complain_overflow_dont, /* complain_on_overflow */
1111 ppc_elf_unhandled_reloc, /* special_function */
1112 "R_PPC_GOT_DTPREL16_HA", /* name */
1113 FALSE, /* partial_inplace */
1114 0, /* src_mask */
1115 0xffff, /* dst_mask */
1116 FALSE), /* pcrel_offset */
1117
1118 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1119 offset to the entry. */
1120 HOWTO (R_PPC_GOT_TPREL16,
1121 0, /* rightshift */
1122 1, /* size (0 = byte, 1 = short, 2 = long) */
1123 16, /* bitsize */
1124 FALSE, /* pc_relative */
1125 0, /* bitpos */
1126 complain_overflow_signed, /* complain_on_overflow */
1127 ppc_elf_unhandled_reloc, /* special_function */
1128 "R_PPC_GOT_TPREL16", /* name */
1129 FALSE, /* partial_inplace */
1130 0, /* src_mask */
1131 0xffff, /* dst_mask */
1132 FALSE), /* pcrel_offset */
1133
1134 /* Like GOT_TPREL16, but no overflow. */
1135 HOWTO (R_PPC_GOT_TPREL16_LO,
1136 0, /* rightshift */
1137 1, /* size (0 = byte, 1 = short, 2 = long) */
1138 16, /* bitsize */
1139 FALSE, /* pc_relative */
1140 0, /* bitpos */
1141 complain_overflow_dont, /* complain_on_overflow */
1142 ppc_elf_unhandled_reloc, /* special_function */
1143 "R_PPC_GOT_TPREL16_LO", /* name */
1144 FALSE, /* partial_inplace */
1145 0, /* src_mask */
1146 0xffff, /* dst_mask */
1147 FALSE), /* pcrel_offset */
1148
1149 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1150 HOWTO (R_PPC_GOT_TPREL16_HI,
1151 16, /* rightshift */
1152 1, /* size (0 = byte, 1 = short, 2 = long) */
1153 16, /* bitsize */
1154 FALSE, /* pc_relative */
1155 0, /* bitpos */
1156 complain_overflow_dont, /* complain_on_overflow */
1157 ppc_elf_unhandled_reloc, /* special_function */
1158 "R_PPC_GOT_TPREL16_HI", /* name */
1159 FALSE, /* partial_inplace */
1160 0, /* src_mask */
1161 0xffff, /* dst_mask */
1162 FALSE), /* pcrel_offset */
1163
1164 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1165 HOWTO (R_PPC_GOT_TPREL16_HA,
1166 16, /* rightshift */
1167 1, /* size (0 = byte, 1 = short, 2 = long) */
1168 16, /* bitsize */
1169 FALSE, /* pc_relative */
1170 0, /* bitpos */
1171 complain_overflow_dont, /* complain_on_overflow */
1172 ppc_elf_unhandled_reloc, /* special_function */
1173 "R_PPC_GOT_TPREL16_HA", /* name */
1174 FALSE, /* partial_inplace */
1175 0, /* src_mask */
1176 0xffff, /* dst_mask */
1177 FALSE), /* pcrel_offset */
1178
1179 /* The remaining relocs are from the Embedded ELF ABI, and are not
1180 in the SVR4 ELF ABI. */
1181
1182 /* 32 bit value resulting from the addend minus the symbol. */
1183 HOWTO (R_PPC_EMB_NADDR32, /* type */
1184 0, /* rightshift */
1185 2, /* size (0 = byte, 1 = short, 2 = long) */
1186 32, /* bitsize */
1187 FALSE, /* pc_relative */
1188 0, /* bitpos */
1189 complain_overflow_bitfield, /* complain_on_overflow */
1190 bfd_elf_generic_reloc, /* special_function */
1191 "R_PPC_EMB_NADDR32", /* name */
1192 FALSE, /* partial_inplace */
1193 0, /* src_mask */
1194 0xffffffff, /* dst_mask */
1195 FALSE), /* pcrel_offset */
1196
1197 /* 16 bit value resulting from the addend minus the symbol. */
1198 HOWTO (R_PPC_EMB_NADDR16, /* type */
1199 0, /* rightshift */
1200 1, /* size (0 = byte, 1 = short, 2 = long) */
1201 16, /* bitsize */
1202 FALSE, /* pc_relative */
1203 0, /* bitpos */
1204 complain_overflow_bitfield, /* complain_on_overflow */
1205 bfd_elf_generic_reloc, /* special_function */
1206 "R_PPC_EMB_NADDR16", /* name */
1207 FALSE, /* partial_inplace */
1208 0, /* src_mask */
1209 0xffff, /* dst_mask */
1210 FALSE), /* pcrel_offset */
1211
1212 /* 16 bit value resulting from the addend minus the symbol. */
1213 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1214 0, /* rightshift */
1215 1, /* size (0 = byte, 1 = short, 2 = long) */
1216 16, /* bitsize */
1217 FALSE, /* pc_relative */
1218 0, /* bitpos */
1219 complain_overflow_dont,/* complain_on_overflow */
1220 bfd_elf_generic_reloc, /* special_function */
1221 "R_PPC_EMB_ADDR16_LO", /* name */
1222 FALSE, /* partial_inplace */
1223 0, /* src_mask */
1224 0xffff, /* dst_mask */
1225 FALSE), /* pcrel_offset */
1226
1227 /* The high order 16 bits of the addend minus the symbol. */
1228 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1229 16, /* rightshift */
1230 1, /* size (0 = byte, 1 = short, 2 = long) */
1231 16, /* bitsize */
1232 FALSE, /* pc_relative */
1233 0, /* bitpos */
1234 complain_overflow_dont, /* complain_on_overflow */
1235 bfd_elf_generic_reloc, /* special_function */
1236 "R_PPC_EMB_NADDR16_HI", /* name */
1237 FALSE, /* partial_inplace */
1238 0, /* src_mask */
1239 0xffff, /* dst_mask */
1240 FALSE), /* pcrel_offset */
1241
1242 /* The high order 16 bits of the result of the addend minus the address,
1243 plus 1 if the contents of the low 16 bits, treated as a signed number,
1244 is negative. */
1245 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1246 16, /* rightshift */
1247 1, /* size (0 = byte, 1 = short, 2 = long) */
1248 16, /* bitsize */
1249 FALSE, /* pc_relative */
1250 0, /* bitpos */
1251 complain_overflow_dont, /* complain_on_overflow */
1252 ppc_elf_addr16_ha_reloc, /* special_function */
1253 "R_PPC_EMB_NADDR16_HA", /* name */
1254 FALSE, /* partial_inplace */
1255 0, /* src_mask */
1256 0xffff, /* dst_mask */
1257 FALSE), /* pcrel_offset */
1258
1259 /* 16 bit value resulting from allocating a 4 byte word to hold an
1260 address in the .sdata section, and returning the offset from
1261 _SDA_BASE_ for that relocation. */
1262 HOWTO (R_PPC_EMB_SDAI16, /* type */
1263 0, /* rightshift */
1264 1, /* size (0 = byte, 1 = short, 2 = long) */
1265 16, /* bitsize */
1266 FALSE, /* pc_relative */
1267 0, /* bitpos */
1268 complain_overflow_bitfield, /* complain_on_overflow */
1269 bfd_elf_generic_reloc, /* special_function */
1270 "R_PPC_EMB_SDAI16", /* name */
1271 FALSE, /* partial_inplace */
1272 0, /* src_mask */
1273 0xffff, /* dst_mask */
1274 FALSE), /* pcrel_offset */
1275
1276 /* 16 bit value resulting from allocating a 4 byte word to hold an
1277 address in the .sdata2 section, and returning the offset from
1278 _SDA2_BASE_ for that relocation. */
1279 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1280 0, /* rightshift */
1281 1, /* size (0 = byte, 1 = short, 2 = long) */
1282 16, /* bitsize */
1283 FALSE, /* pc_relative */
1284 0, /* bitpos */
1285 complain_overflow_bitfield, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 "R_PPC_EMB_SDA2I16", /* name */
1288 FALSE, /* partial_inplace */
1289 0, /* src_mask */
1290 0xffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1292
1293 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1294 small data items. */
1295 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1296 0, /* rightshift */
1297 1, /* size (0 = byte, 1 = short, 2 = long) */
1298 16, /* bitsize */
1299 FALSE, /* pc_relative */
1300 0, /* bitpos */
1301 complain_overflow_signed, /* complain_on_overflow */
1302 bfd_elf_generic_reloc, /* special_function */
1303 "R_PPC_EMB_SDA2REL", /* name */
1304 FALSE, /* partial_inplace */
1305 0, /* src_mask */
1306 0xffff, /* dst_mask */
1307 FALSE), /* pcrel_offset */
1308
1309 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1310 signed offset from the appropriate base, and filling in the register
1311 field with the appropriate register (0, 2, or 13). */
1312 HOWTO (R_PPC_EMB_SDA21, /* type */
1313 0, /* rightshift */
1314 2, /* size (0 = byte, 1 = short, 2 = long) */
1315 16, /* bitsize */
1316 FALSE, /* pc_relative */
1317 0, /* bitpos */
1318 complain_overflow_signed, /* complain_on_overflow */
1319 bfd_elf_generic_reloc, /* special_function */
1320 "R_PPC_EMB_SDA21", /* name */
1321 FALSE, /* partial_inplace */
1322 0, /* src_mask */
1323 0xffff, /* dst_mask */
1324 FALSE), /* pcrel_offset */
1325
1326 /* Relocation not handled: R_PPC_EMB_MRKREF */
1327 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1328 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1330 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1331 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1332
1333 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1334 in the 16 bit signed offset from the appropriate base, and filling in the
1335 register field with the appropriate register (0, 2, or 13). */
1336 HOWTO (R_PPC_EMB_RELSDA, /* type */
1337 0, /* rightshift */
1338 1, /* size (0 = byte, 1 = short, 2 = long) */
1339 16, /* bitsize */
1340 TRUE, /* pc_relative */
1341 0, /* bitpos */
1342 complain_overflow_signed, /* complain_on_overflow */
1343 bfd_elf_generic_reloc, /* special_function */
1344 "R_PPC_EMB_RELSDA", /* name */
1345 FALSE, /* partial_inplace */
1346 0, /* src_mask */
1347 0xffff, /* dst_mask */
1348 FALSE), /* pcrel_offset */
1349
1350 /* A 16 bit relative relocation. */
1351 HOWTO (R_PPC_REL16, /* type */
1352 0, /* rightshift */
1353 1, /* size (0 = byte, 1 = short, 2 = long) */
1354 16, /* bitsize */
1355 TRUE, /* pc_relative */
1356 0, /* bitpos */
1357 complain_overflow_bitfield, /* complain_on_overflow */
1358 bfd_elf_generic_reloc, /* special_function */
1359 "R_PPC_REL16", /* name */
1360 FALSE, /* partial_inplace */
1361 0, /* src_mask */
1362 0xffff, /* dst_mask */
1363 TRUE), /* pcrel_offset */
1364
1365 /* A 16 bit relative relocation without overflow. */
1366 HOWTO (R_PPC_REL16_LO, /* type */
1367 0, /* rightshift */
1368 1, /* size (0 = byte, 1 = short, 2 = long) */
1369 16, /* bitsize */
1370 TRUE, /* pc_relative */
1371 0, /* bitpos */
1372 complain_overflow_dont,/* complain_on_overflow */
1373 bfd_elf_generic_reloc, /* special_function */
1374 "R_PPC_REL16_LO", /* name */
1375 FALSE, /* partial_inplace */
1376 0, /* src_mask */
1377 0xffff, /* dst_mask */
1378 TRUE), /* pcrel_offset */
1379
1380 /* The high order 16 bits of a relative address. */
1381 HOWTO (R_PPC_REL16_HI, /* type */
1382 16, /* rightshift */
1383 1, /* size (0 = byte, 1 = short, 2 = long) */
1384 16, /* bitsize */
1385 TRUE, /* pc_relative */
1386 0, /* bitpos */
1387 complain_overflow_dont, /* complain_on_overflow */
1388 bfd_elf_generic_reloc, /* special_function */
1389 "R_PPC_REL16_HI", /* name */
1390 FALSE, /* partial_inplace */
1391 0, /* src_mask */
1392 0xffff, /* dst_mask */
1393 TRUE), /* pcrel_offset */
1394
1395 /* The high order 16 bits of a relative address, plus 1 if the contents of
1396 the low 16 bits, treated as a signed number, is negative. */
1397 HOWTO (R_PPC_REL16_HA, /* type */
1398 16, /* rightshift */
1399 1, /* size (0 = byte, 1 = short, 2 = long) */
1400 16, /* bitsize */
1401 TRUE, /* pc_relative */
1402 0, /* bitpos */
1403 complain_overflow_dont, /* complain_on_overflow */
1404 ppc_elf_addr16_ha_reloc, /* special_function */
1405 "R_PPC_REL16_HA", /* name */
1406 FALSE, /* partial_inplace */
1407 0, /* src_mask */
1408 0xffff, /* dst_mask */
1409 TRUE), /* pcrel_offset */
1410
1411 /* GNU extension to record C++ vtable hierarchy. */
1412 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1413 0, /* rightshift */
1414 0, /* size (0 = byte, 1 = short, 2 = long) */
1415 0, /* bitsize */
1416 FALSE, /* pc_relative */
1417 0, /* bitpos */
1418 complain_overflow_dont, /* complain_on_overflow */
1419 NULL, /* special_function */
1420 "R_PPC_GNU_VTINHERIT", /* name */
1421 FALSE, /* partial_inplace */
1422 0, /* src_mask */
1423 0, /* dst_mask */
1424 FALSE), /* pcrel_offset */
1425
1426 /* GNU extension to record C++ vtable member usage. */
1427 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1428 0, /* rightshift */
1429 0, /* size (0 = byte, 1 = short, 2 = long) */
1430 0, /* bitsize */
1431 FALSE, /* pc_relative */
1432 0, /* bitpos */
1433 complain_overflow_dont, /* complain_on_overflow */
1434 NULL, /* special_function */
1435 "R_PPC_GNU_VTENTRY", /* name */
1436 FALSE, /* partial_inplace */
1437 0, /* src_mask */
1438 0, /* dst_mask */
1439 FALSE), /* pcrel_offset */
1440
1441 /* Phony reloc to handle AIX style TOC entries. */
1442 HOWTO (R_PPC_TOC16, /* type */
1443 0, /* rightshift */
1444 1, /* size (0 = byte, 1 = short, 2 = long) */
1445 16, /* bitsize */
1446 FALSE, /* pc_relative */
1447 0, /* bitpos */
1448 complain_overflow_signed, /* complain_on_overflow */
1449 bfd_elf_generic_reloc, /* special_function */
1450 "R_PPC_TOC16", /* name */
1451 FALSE, /* partial_inplace */
1452 0, /* src_mask */
1453 0xffff, /* dst_mask */
1454 FALSE), /* pcrel_offset */
1455 };
1456 \f
1457 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1458
1459 static void
1460 ppc_elf_howto_init (void)
1461 {
1462 unsigned int i, type;
1463
1464 for (i = 0;
1465 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1466 i++)
1467 {
1468 type = ppc_elf_howto_raw[i].type;
1469 if (type >= (sizeof (ppc_elf_howto_table)
1470 / sizeof (ppc_elf_howto_table[0])))
1471 abort ();
1472 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1473 }
1474 }
1475
1476 static reloc_howto_type *
1477 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1478 bfd_reloc_code_real_type code)
1479 {
1480 enum elf_ppc_reloc_type r;
1481
1482 /* Initialize howto table if not already done. */
1483 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1484 ppc_elf_howto_init ();
1485
1486 switch (code)
1487 {
1488 default:
1489 return NULL;
1490
1491 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1492 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1493 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1494 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1495 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1496 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1497 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1498 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1499 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1500 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1501 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1502 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1503 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1504 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1505 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1506 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1507 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1508 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1509 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1510 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1511 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1512 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1513 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1514 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1515 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1516 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1517 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1518 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1519 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1520 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1521 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1522 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1523 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1524 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1525 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1526 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1527 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1528 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1529 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1530 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1531 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1532 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1533 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1534 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1535 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1536 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1537 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1541 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1545 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1549 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1553 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1554 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1558 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1559 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1561 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1562 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1563 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1564 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1565 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1567 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1568 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1569 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1570 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1571 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1572 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1573 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1574 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1575 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1576 }
1577
1578 return ppc_elf_howto_table[r];
1579 };
1580
1581 static reloc_howto_type *
1582 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1583 const char *r_name)
1584 {
1585 unsigned int i;
1586
1587 for (i = 0;
1588 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1589 i++)
1590 if (ppc_elf_howto_raw[i].name != NULL
1591 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1592 return &ppc_elf_howto_raw[i];
1593
1594 return NULL;
1595 }
1596
1597 /* Set the howto pointer for a PowerPC ELF reloc. */
1598
1599 static void
1600 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1601 arelent *cache_ptr,
1602 Elf_Internal_Rela *dst)
1603 {
1604 /* Initialize howto table if not already done. */
1605 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1606 ppc_elf_howto_init ();
1607
1608 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1609 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1610 }
1611
1612 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1613
1614 static bfd_reloc_status_type
1615 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1616 arelent *reloc_entry,
1617 asymbol *symbol,
1618 void *data ATTRIBUTE_UNUSED,
1619 asection *input_section,
1620 bfd *output_bfd,
1621 char **error_message ATTRIBUTE_UNUSED)
1622 {
1623 bfd_vma relocation;
1624
1625 if (output_bfd != NULL)
1626 {
1627 reloc_entry->address += input_section->output_offset;
1628 return bfd_reloc_ok;
1629 }
1630
1631 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1632 return bfd_reloc_outofrange;
1633
1634 if (bfd_is_com_section (symbol->section))
1635 relocation = 0;
1636 else
1637 relocation = symbol->value;
1638
1639 relocation += symbol->section->output_section->vma;
1640 relocation += symbol->section->output_offset;
1641 relocation += reloc_entry->addend;
1642 if (reloc_entry->howto->pc_relative)
1643 relocation -= reloc_entry->address;
1644
1645 reloc_entry->addend += (relocation & 0x8000) << 1;
1646
1647 return bfd_reloc_continue;
1648 }
1649
1650 static bfd_reloc_status_type
1651 ppc_elf_unhandled_reloc (bfd *abfd,
1652 arelent *reloc_entry,
1653 asymbol *symbol,
1654 void *data,
1655 asection *input_section,
1656 bfd *output_bfd,
1657 char **error_message)
1658 {
1659 /* If this is a relocatable link (output_bfd test tells us), just
1660 call the generic function. Any adjustment will be done at final
1661 link time. */
1662 if (output_bfd != NULL)
1663 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1664 input_section, output_bfd, error_message);
1665
1666 if (error_message != NULL)
1667 {
1668 static char buf[60];
1669 sprintf (buf, _("generic linker can't handle %s"),
1670 reloc_entry->howto->name);
1671 *error_message = buf;
1672 }
1673 return bfd_reloc_dangerous;
1674 }
1675 \f
1676 /* Sections created by the linker. */
1677
1678 typedef struct elf_linker_section
1679 {
1680 /* Pointer to the bfd section. */
1681 asection *section;
1682 /* Section name. */
1683 const char *name;
1684 /* Associated bss section name. */
1685 const char *bss_name;
1686 /* Associated symbol name. */
1687 const char *sym_name;
1688 /* Associated symbol. */
1689 struct elf_link_hash_entry *sym;
1690 } elf_linker_section_t;
1691
1692 /* Linked list of allocated pointer entries. This hangs off of the
1693 symbol lists, and provides allows us to return different pointers,
1694 based on different addend's. */
1695
1696 typedef struct elf_linker_section_pointers
1697 {
1698 /* next allocated pointer for this symbol */
1699 struct elf_linker_section_pointers *next;
1700 /* offset of pointer from beginning of section */
1701 bfd_vma offset;
1702 /* addend used */
1703 bfd_vma addend;
1704 /* which linker section this is */
1705 elf_linker_section_t *lsect;
1706 } elf_linker_section_pointers_t;
1707
1708 struct ppc_elf_obj_tdata
1709 {
1710 struct elf_obj_tdata elf;
1711
1712 /* A mapping from local symbols to offsets into the various linker
1713 sections added. This is index by the symbol index. */
1714 elf_linker_section_pointers_t **linker_section_pointers;
1715 };
1716
1717 #define ppc_elf_tdata(bfd) \
1718 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1719
1720 #define elf_local_ptr_offsets(bfd) \
1721 (ppc_elf_tdata (bfd)->linker_section_pointers)
1722
1723 /* Override the generic function because we store some extras. */
1724
1725 static bfd_boolean
1726 ppc_elf_mkobject (bfd *abfd)
1727 {
1728 if (abfd->tdata.any == NULL)
1729 {
1730 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1731 abfd->tdata.any = bfd_zalloc (abfd, amt);
1732 if (abfd->tdata.any == NULL)
1733 return FALSE;
1734 }
1735 return bfd_elf_mkobject (abfd);
1736 }
1737
1738 /* Fix bad default arch selected for a 32 bit input bfd when the
1739 default is 64 bit. */
1740
1741 static bfd_boolean
1742 ppc_elf_object_p (bfd *abfd)
1743 {
1744 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1745 {
1746 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1747
1748 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1749 {
1750 /* Relies on arch after 64 bit default being 32 bit default. */
1751 abfd->arch_info = abfd->arch_info->next;
1752 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1753 }
1754 }
1755 return TRUE;
1756 }
1757
1758 /* Function to set whether a module needs the -mrelocatable bit set. */
1759
1760 static bfd_boolean
1761 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1762 {
1763 BFD_ASSERT (!elf_flags_init (abfd)
1764 || elf_elfheader (abfd)->e_flags == flags);
1765
1766 elf_elfheader (abfd)->e_flags = flags;
1767 elf_flags_init (abfd) = TRUE;
1768 return TRUE;
1769 }
1770
1771 /* Support for core dump NOTE sections. */
1772
1773 static bfd_boolean
1774 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1775 {
1776 int offset;
1777 unsigned int size;
1778
1779 switch (note->descsz)
1780 {
1781 default:
1782 return FALSE;
1783
1784 case 268: /* Linux/PPC. */
1785 /* pr_cursig */
1786 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1787
1788 /* pr_pid */
1789 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1790
1791 /* pr_reg */
1792 offset = 72;
1793 size = 192;
1794
1795 break;
1796 }
1797
1798 /* Make a ".reg/999" section. */
1799 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1800 size, note->descpos + offset);
1801 }
1802
1803 static bfd_boolean
1804 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1805 {
1806 switch (note->descsz)
1807 {
1808 default:
1809 return FALSE;
1810
1811 case 128: /* Linux/PPC elf_prpsinfo. */
1812 elf_tdata (abfd)->core_program
1813 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1814 elf_tdata (abfd)->core_command
1815 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1816 }
1817
1818 /* Note that for some reason, a spurious space is tacked
1819 onto the end of the args in some (at least one anyway)
1820 implementations, so strip it off if it exists. */
1821
1822 {
1823 char *command = elf_tdata (abfd)->core_command;
1824 int n = strlen (command);
1825
1826 if (0 < n && command[n - 1] == ' ')
1827 command[n - 1] = '\0';
1828 }
1829
1830 return TRUE;
1831 }
1832
1833 static char *
1834 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1835 {
1836 switch (note_type)
1837 {
1838 default:
1839 return NULL;
1840
1841 case NT_PRPSINFO:
1842 {
1843 char data[128];
1844 va_list ap;
1845
1846 va_start (ap, note_type);
1847 memset (data, 0, 32);
1848 strncpy (data + 32, va_arg (ap, const char *), 16);
1849 strncpy (data + 48, va_arg (ap, const char *), 80);
1850 va_end (ap);
1851 return elfcore_write_note (abfd, buf, bufsiz,
1852 "CORE", note_type, data, sizeof (data));
1853 }
1854
1855 case NT_PRSTATUS:
1856 {
1857 char data[268];
1858 va_list ap;
1859 long pid;
1860 int cursig;
1861 const void *greg;
1862
1863 va_start (ap, note_type);
1864 memset (data, 0, 72);
1865 pid = va_arg (ap, long);
1866 bfd_put_32 (abfd, pid, data + 24);
1867 cursig = va_arg (ap, int);
1868 bfd_put_16 (abfd, cursig, data + 12);
1869 greg = va_arg (ap, const void *);
1870 memcpy (data + 72, greg, 192);
1871 memset (data + 264, 0, 4);
1872 va_end (ap);
1873 return elfcore_write_note (abfd, buf, bufsiz,
1874 "CORE", note_type, data, sizeof (data));
1875 }
1876 }
1877 }
1878
1879 /* Return address for Ith PLT stub in section PLT, for relocation REL
1880 or (bfd_vma) -1 if it should not be included. */
1881
1882 static bfd_vma
1883 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1884 const asection *plt ATTRIBUTE_UNUSED,
1885 const arelent *rel)
1886 {
1887 return rel->address;
1888 }
1889
1890 /* Handle a PowerPC specific section when reading an object file. This
1891 is called when bfd_section_from_shdr finds a section with an unknown
1892 type. */
1893
1894 static bfd_boolean
1895 ppc_elf_section_from_shdr (bfd *abfd,
1896 Elf_Internal_Shdr *hdr,
1897 const char *name,
1898 int shindex)
1899 {
1900 asection *newsect;
1901 flagword flags;
1902
1903 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1904 return FALSE;
1905
1906 newsect = hdr->bfd_section;
1907 flags = bfd_get_section_flags (abfd, newsect);
1908 if (hdr->sh_flags & SHF_EXCLUDE)
1909 flags |= SEC_EXCLUDE;
1910
1911 if (hdr->sh_type == SHT_ORDERED)
1912 flags |= SEC_SORT_ENTRIES;
1913
1914 bfd_set_section_flags (abfd, newsect, flags);
1915 return TRUE;
1916 }
1917
1918 /* Set up any other section flags and such that may be necessary. */
1919
1920 static bfd_boolean
1921 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1922 Elf_Internal_Shdr *shdr,
1923 asection *asect)
1924 {
1925 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1926 shdr->sh_flags |= SHF_EXCLUDE;
1927
1928 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1929 shdr->sh_type = SHT_ORDERED;
1930
1931 return TRUE;
1932 }
1933
1934 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1935 need to bump up the number of section headers. */
1936
1937 static int
1938 ppc_elf_additional_program_headers (bfd *abfd,
1939 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1940 {
1941 asection *s;
1942 int ret = 0;
1943
1944 s = bfd_get_section_by_name (abfd, ".sbss2");
1945 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1946 ++ret;
1947
1948 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1949 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1950 ++ret;
1951
1952 return ret;
1953 }
1954
1955 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1956 .PPC.EMB.sbss0 a normal section, and not a bss section so
1957 that the linker doesn't crater when trying to make more than
1958 2 sections. */
1959
1960 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1961 {
1962 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1963 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1964 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1965 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1966 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1967 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1968 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1969 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1970 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1971 { NULL, 0, 0, 0, 0 }
1972 };
1973
1974 /* This is what we want for new plt/got. */
1975 static struct bfd_elf_special_section ppc_alt_plt =
1976 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1977
1978 static const struct bfd_elf_special_section *
1979 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1980 {
1981 const struct bfd_elf_special_section *ssect;
1982
1983 /* See if this is one of the special sections. */
1984 if (sec->name == NULL)
1985 return NULL;
1986
1987 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1988 sec->use_rela_p);
1989 if (ssect != NULL)
1990 {
1991 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1992 ssect = &ppc_alt_plt;
1993 return ssect;
1994 }
1995
1996 return _bfd_elf_get_sec_type_attr (abfd, sec);
1997 }
1998 \f
1999 /* Very simple linked list structure for recording apuinfo values. */
2000 typedef struct apuinfo_list
2001 {
2002 struct apuinfo_list *next;
2003 unsigned long value;
2004 }
2005 apuinfo_list;
2006
2007 static apuinfo_list *head;
2008
2009
2010 static void
2011 apuinfo_list_init (void)
2012 {
2013 head = NULL;
2014 }
2015
2016 static void
2017 apuinfo_list_add (unsigned long value)
2018 {
2019 apuinfo_list *entry = head;
2020
2021 while (entry != NULL)
2022 {
2023 if (entry->value == value)
2024 return;
2025 entry = entry->next;
2026 }
2027
2028 entry = bfd_malloc (sizeof (* entry));
2029 if (entry == NULL)
2030 return;
2031
2032 entry->value = value;
2033 entry->next = head;
2034 head = entry;
2035 }
2036
2037 static unsigned
2038 apuinfo_list_length (void)
2039 {
2040 apuinfo_list *entry;
2041 unsigned long count;
2042
2043 for (entry = head, count = 0;
2044 entry;
2045 entry = entry->next)
2046 ++ count;
2047
2048 return count;
2049 }
2050
2051 static inline unsigned long
2052 apuinfo_list_element (unsigned long number)
2053 {
2054 apuinfo_list * entry;
2055
2056 for (entry = head;
2057 entry && number --;
2058 entry = entry->next)
2059 ;
2060
2061 return entry ? entry->value : 0;
2062 }
2063
2064 static void
2065 apuinfo_list_finish (void)
2066 {
2067 apuinfo_list *entry;
2068
2069 for (entry = head; entry;)
2070 {
2071 apuinfo_list *next = entry->next;
2072 free (entry);
2073 entry = next;
2074 }
2075
2076 head = NULL;
2077 }
2078
2079 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2080 #define APUINFO_LABEL "APUinfo"
2081
2082 /* Scan the input BFDs and create a linked list of
2083 the APUinfo values that will need to be emitted. */
2084
2085 static void
2086 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2087 {
2088 bfd *ibfd;
2089 asection *asec;
2090 char *buffer;
2091 unsigned num_input_sections;
2092 bfd_size_type output_section_size;
2093 unsigned i;
2094 unsigned num_entries;
2095 unsigned long offset;
2096 unsigned long length;
2097 const char *error_message = NULL;
2098
2099 if (link_info == NULL)
2100 return;
2101
2102 /* Scan the input bfds, looking for apuinfo sections. */
2103 num_input_sections = 0;
2104 output_section_size = 0;
2105
2106 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2107 {
2108 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2109 if (asec)
2110 {
2111 ++ num_input_sections;
2112 output_section_size += asec->size;
2113 }
2114 }
2115
2116 /* We need at least one input sections
2117 in order to make merging worthwhile. */
2118 if (num_input_sections < 1)
2119 return;
2120
2121 /* Just make sure that the output section exists as well. */
2122 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2123 if (asec == NULL)
2124 return;
2125
2126 /* Allocate a buffer for the contents of the input sections. */
2127 buffer = bfd_malloc (output_section_size);
2128 if (buffer == NULL)
2129 return;
2130
2131 offset = 0;
2132 apuinfo_list_init ();
2133
2134 /* Read in the input sections contents. */
2135 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2136 {
2137 unsigned long datum;
2138 char *ptr;
2139
2140 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2141 if (asec == NULL)
2142 continue;
2143
2144 length = asec->size;
2145 if (length < 24)
2146 {
2147 error_message = _("corrupt or empty %s section in %B");
2148 goto fail;
2149 }
2150
2151 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2152 || (bfd_bread (buffer + offset, length, ibfd) != length))
2153 {
2154 error_message = _("unable to read in %s section from %B");
2155 goto fail;
2156 }
2157
2158 /* Process the contents of the section. */
2159 ptr = buffer + offset;
2160 error_message = _("corrupt %s section in %B");
2161
2162 /* Verify the contents of the header. Note - we have to
2163 extract the values this way in order to allow for a
2164 host whose endian-ness is different from the target. */
2165 datum = bfd_get_32 (ibfd, ptr);
2166 if (datum != sizeof APUINFO_LABEL)
2167 goto fail;
2168
2169 datum = bfd_get_32 (ibfd, ptr + 8);
2170 if (datum != 0x2)
2171 goto fail;
2172
2173 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2174 goto fail;
2175
2176 /* Get the number of bytes used for apuinfo entries. */
2177 datum = bfd_get_32 (ibfd, ptr + 4);
2178 if (datum + 20 != length)
2179 goto fail;
2180
2181 /* Make sure that we do not run off the end of the section. */
2182 if (offset + length > output_section_size)
2183 goto fail;
2184
2185 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2186 for (i = 0; i < datum; i += 4)
2187 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2188
2189 /* Update the offset. */
2190 offset += length;
2191 }
2192
2193 error_message = NULL;
2194
2195 /* Compute the size of the output section. */
2196 num_entries = apuinfo_list_length ();
2197 output_section_size = 20 + num_entries * 4;
2198
2199 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2200
2201 if (! bfd_set_section_size (abfd, asec, output_section_size))
2202 ibfd = abfd,
2203 error_message = _("warning: unable to set size of %s section in %B");
2204
2205 fail:
2206 free (buffer);
2207
2208 if (error_message)
2209 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2210 }
2211
2212 /* Prevent the output section from accumulating the input sections'
2213 contents. We have already stored this in our linked list structure. */
2214
2215 static bfd_boolean
2216 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2217 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2218 asection *asec,
2219 bfd_byte *contents ATTRIBUTE_UNUSED)
2220 {
2221 return (apuinfo_list_length ()
2222 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2223 }
2224
2225 /* Finally we can generate the output section. */
2226
2227 static void
2228 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2229 {
2230 bfd_byte *buffer;
2231 asection *asec;
2232 unsigned i;
2233 unsigned num_entries;
2234 bfd_size_type length;
2235
2236 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2237 if (asec == NULL)
2238 return;
2239
2240 if (apuinfo_list_length () == 0)
2241 return;
2242
2243 length = asec->size;
2244 if (length < 20)
2245 return;
2246
2247 buffer = bfd_malloc (length);
2248 if (buffer == NULL)
2249 {
2250 (*_bfd_error_handler)
2251 (_("failed to allocate space for new APUinfo section."));
2252 return;
2253 }
2254
2255 /* Create the apuinfo header. */
2256 num_entries = apuinfo_list_length ();
2257 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2258 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2259 bfd_put_32 (abfd, 0x2, buffer + 8);
2260 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2261
2262 length = 20;
2263 for (i = 0; i < num_entries; i++)
2264 {
2265 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2266 length += 4;
2267 }
2268
2269 if (length != asec->size)
2270 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2271
2272 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2273 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2274
2275 free (buffer);
2276
2277 apuinfo_list_finish ();
2278 }
2279 \f
2280 /* The following functions are specific to the ELF linker, while
2281 functions above are used generally. They appear in this file more
2282 or less in the order in which they are called. eg.
2283 ppc_elf_check_relocs is called early in the link process,
2284 ppc_elf_finish_dynamic_sections is one of the last functions
2285 called. */
2286
2287 /* The PPC linker needs to keep track of the number of relocs that it
2288 decides to copy as dynamic relocs in check_relocs for each symbol.
2289 This is so that it can later discard them if they are found to be
2290 unnecessary. We store the information in a field extending the
2291 regular ELF linker hash table. */
2292
2293 struct ppc_elf_dyn_relocs
2294 {
2295 struct ppc_elf_dyn_relocs *next;
2296
2297 /* The input section of the reloc. */
2298 asection *sec;
2299
2300 /* Total number of relocs copied for the input section. */
2301 bfd_size_type count;
2302
2303 /* Number of pc-relative relocs copied for the input section. */
2304 bfd_size_type pc_count;
2305 };
2306
2307 /* Track PLT entries needed for a given symbol. We might need more
2308 than one glink entry per symbol. */
2309 struct plt_entry
2310 {
2311 struct plt_entry *next;
2312
2313 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2314 This field stores the offset into .got2 used to initialise the
2315 GOT pointer reg. It will always be at least 32768 (and for
2316 current gcc this is the only offset used). */
2317 bfd_vma addend;
2318
2319 /* The .got2 section. */
2320 asection *sec;
2321
2322 /* PLT refcount or offset. */
2323 union
2324 {
2325 bfd_signed_vma refcount;
2326 bfd_vma offset;
2327 } plt;
2328
2329 /* .glink stub offset. */
2330 bfd_vma glink_offset;
2331 };
2332
2333 /* Of those relocs that might be copied as dynamic relocs, this macro
2334 selects those that must be copied when linking a shared library,
2335 even when the symbol is local. */
2336
2337 #define MUST_BE_DYN_RELOC(RTYPE) \
2338 ((RTYPE) != R_PPC_REL24 \
2339 && (RTYPE) != R_PPC_REL14 \
2340 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2341 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2342 && (RTYPE) != R_PPC_REL32)
2343
2344 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2345 copying dynamic variables from a shared lib into an app's dynbss
2346 section, and instead use a dynamic relocation to point into the
2347 shared lib. */
2348 #define ELIMINATE_COPY_RELOCS 1
2349
2350 /* PPC ELF linker hash entry. */
2351
2352 struct ppc_elf_link_hash_entry
2353 {
2354 struct elf_link_hash_entry elf;
2355
2356 /* If this symbol is used in the linker created sections, the processor
2357 specific backend uses this field to map the field into the offset
2358 from the beginning of the section. */
2359 elf_linker_section_pointers_t *linker_section_pointer;
2360
2361 /* Track dynamic relocs copied for this symbol. */
2362 struct ppc_elf_dyn_relocs *dyn_relocs;
2363
2364 /* Contexts in which symbol is used in the GOT (or TOC).
2365 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2366 corresponding relocs are encountered during check_relocs.
2367 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2368 indicate the corresponding GOT entry type is not needed. */
2369 #define TLS_GD 1 /* GD reloc. */
2370 #define TLS_LD 2 /* LD reloc. */
2371 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2372 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2373 #define TLS_TLS 16 /* Any TLS reloc. */
2374 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2375 char tls_mask;
2376
2377 /* Nonzero if we have seen a small data relocation referring to this
2378 symbol. */
2379 unsigned char has_sda_refs;
2380 };
2381
2382 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2383
2384 enum ppc_elf_plt_type {
2385 PLT_UNSET,
2386 PLT_OLD,
2387 PLT_NEW,
2388 PLT_VXWORKS
2389 };
2390
2391 /* PPC ELF linker hash table. */
2392
2393 struct ppc_elf_link_hash_table
2394 {
2395 struct elf_link_hash_table elf;
2396
2397 /* Short-cuts to get to dynamic linker sections. */
2398 asection *got;
2399 asection *relgot;
2400 asection *glink;
2401 asection *plt;
2402 asection *relplt;
2403 asection *dynbss;
2404 asection *relbss;
2405 asection *dynsbss;
2406 asection *relsbss;
2407 elf_linker_section_t sdata[2];
2408 asection *sbss;
2409
2410 /* Shortcut to .__tls_get_addr. */
2411 struct elf_link_hash_entry *tls_get_addr;
2412
2413 /* TLS local dynamic got entry handling. */
2414 union {
2415 bfd_signed_vma refcount;
2416 bfd_vma offset;
2417 } tlsld_got;
2418
2419 /* Offset of PltResolve function in glink. */
2420 bfd_vma glink_pltresolve;
2421
2422 /* Size of reserved GOT entries. */
2423 unsigned int got_header_size;
2424 /* Non-zero if allocating the header left a gap. */
2425 unsigned int got_gap;
2426
2427 /* The type of PLT we have chosen to use. */
2428 enum ppc_elf_plt_type plt_type;
2429
2430 /* Whether we can use the new PLT layout. */
2431 unsigned int can_use_new_plt:1;
2432
2433 /* Set if we should emit symbols for stubs. */
2434 unsigned int emit_stub_syms:1;
2435
2436 /* Small local sym to section mapping cache. */
2437 struct sym_sec_cache sym_sec;
2438
2439 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2440 asection *srelplt2;
2441
2442 /* The .got.plt section (VxWorks only)*/
2443 asection *sgotplt;
2444
2445 /* True if the target system is VxWorks. */
2446 int is_vxworks;
2447
2448 /* The size of PLT entries. */
2449 int plt_entry_size;
2450 /* The distance between adjacent PLT slots. */
2451 int plt_slot_size;
2452 /* The size of the first PLT entry. */
2453 int plt_initial_entry_size;
2454 };
2455
2456 /* Get the PPC ELF linker hash table from a link_info structure. */
2457
2458 #define ppc_elf_hash_table(p) \
2459 ((struct ppc_elf_link_hash_table *) (p)->hash)
2460
2461 /* Create an entry in a PPC ELF linker hash table. */
2462
2463 static struct bfd_hash_entry *
2464 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2465 struct bfd_hash_table *table,
2466 const char *string)
2467 {
2468 /* Allocate the structure if it has not already been allocated by a
2469 subclass. */
2470 if (entry == NULL)
2471 {
2472 entry = bfd_hash_allocate (table,
2473 sizeof (struct ppc_elf_link_hash_entry));
2474 if (entry == NULL)
2475 return entry;
2476 }
2477
2478 /* Call the allocation method of the superclass. */
2479 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2480 if (entry != NULL)
2481 {
2482 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2483 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2484 ppc_elf_hash_entry (entry)->tls_mask = 0;
2485 }
2486
2487 return entry;
2488 }
2489
2490 /* Create a PPC ELF linker hash table. */
2491
2492 static struct bfd_link_hash_table *
2493 ppc_elf_link_hash_table_create (bfd *abfd)
2494 {
2495 struct ppc_elf_link_hash_table *ret;
2496
2497 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2498 if (ret == NULL)
2499 return NULL;
2500
2501 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2502 ppc_elf_link_hash_newfunc,
2503 sizeof (struct ppc_elf_link_hash_entry)))
2504 {
2505 free (ret);
2506 return NULL;
2507 }
2508
2509 ret->elf.init_plt_refcount.refcount = 0;
2510 ret->elf.init_plt_refcount.glist = NULL;
2511 ret->elf.init_plt_offset.offset = 0;
2512 ret->elf.init_plt_offset.glist = NULL;
2513
2514 ret->sdata[0].name = ".sdata";
2515 ret->sdata[0].sym_name = "_SDA_BASE_";
2516 ret->sdata[0].bss_name = ".sbss";
2517
2518 ret->sdata[1].name = ".sdata2";
2519 ret->sdata[1].sym_name = "_SDA2_BASE_";
2520 ret->sdata[1].bss_name = ".sbss2";
2521
2522 ret->plt_entry_size = 12;
2523 ret->plt_slot_size = 8;
2524 ret->plt_initial_entry_size = 72;
2525
2526 ret->is_vxworks = 0;
2527
2528 return &ret->elf.root;
2529 }
2530
2531 /* Create .got and the related sections. */
2532
2533 static bfd_boolean
2534 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2535 {
2536 struct ppc_elf_link_hash_table *htab;
2537 asection *s;
2538 flagword flags;
2539
2540 if (!_bfd_elf_create_got_section (abfd, info))
2541 return FALSE;
2542
2543 htab = ppc_elf_hash_table (info);
2544 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2545 if (s == NULL)
2546 abort ();
2547
2548 if (htab->is_vxworks)
2549 {
2550 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2551 if (!htab->sgotplt)
2552 abort ();
2553 }
2554 else
2555 {
2556 /* The powerpc .got has a blrl instruction in it. Mark it
2557 executable. */
2558 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2559 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2560 if (!bfd_set_section_flags (abfd, s, flags))
2561 return FALSE;
2562 }
2563
2564 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2565 | SEC_LINKER_CREATED | SEC_READONLY);
2566 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2567 if (!htab->relgot
2568 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2569 return FALSE;
2570
2571 return TRUE;
2572 }
2573
2574 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2575 to output sections (just like _bfd_elf_create_dynamic_sections has
2576 to create .dynbss and .rela.bss). */
2577
2578 static bfd_boolean
2579 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2580 {
2581 struct ppc_elf_link_hash_table *htab;
2582 asection *s;
2583 flagword flags;
2584
2585 htab = ppc_elf_hash_table (info);
2586
2587 if (htab->got == NULL
2588 && !ppc_elf_create_got (abfd, info))
2589 return FALSE;
2590
2591 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2592 return FALSE;
2593
2594 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2595 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2596
2597 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2598 htab->glink = s;
2599 if (s == NULL
2600 || !bfd_set_section_alignment (abfd, s, 4))
2601 return FALSE;
2602
2603 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2604 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2605 SEC_ALLOC | SEC_LINKER_CREATED);
2606 htab->dynsbss = s;
2607 if (s == NULL)
2608 return FALSE;
2609
2610 if (! info->shared)
2611 {
2612 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2613 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2614 htab->relsbss = s;
2615 if (s == NULL
2616 || ! bfd_set_section_alignment (abfd, s, 2))
2617 return FALSE;
2618 }
2619
2620 if (htab->is_vxworks
2621 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2622 return FALSE;
2623
2624 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2625 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2626 if (s == NULL)
2627 abort ();
2628
2629 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2630 if (htab->plt_type == PLT_VXWORKS)
2631 /* The VxWorks PLT is a loaded section with contents. */
2632 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2633 return bfd_set_section_flags (abfd, s, flags);
2634 }
2635
2636 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2637
2638 static void
2639 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2640 struct elf_link_hash_entry *dir,
2641 struct elf_link_hash_entry *ind)
2642 {
2643 struct ppc_elf_link_hash_entry *edir, *eind;
2644
2645 edir = (struct ppc_elf_link_hash_entry *) dir;
2646 eind = (struct ppc_elf_link_hash_entry *) ind;
2647
2648 if (eind->dyn_relocs != NULL)
2649 {
2650 if (edir->dyn_relocs != NULL)
2651 {
2652 struct ppc_elf_dyn_relocs **pp;
2653 struct ppc_elf_dyn_relocs *p;
2654
2655 /* Add reloc counts against the indirect sym to the direct sym
2656 list. Merge any entries against the same section. */
2657 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2658 {
2659 struct ppc_elf_dyn_relocs *q;
2660
2661 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2662 if (q->sec == p->sec)
2663 {
2664 q->pc_count += p->pc_count;
2665 q->count += p->count;
2666 *pp = p->next;
2667 break;
2668 }
2669 if (q == NULL)
2670 pp = &p->next;
2671 }
2672 *pp = edir->dyn_relocs;
2673 }
2674
2675 edir->dyn_relocs = eind->dyn_relocs;
2676 eind->dyn_relocs = NULL;
2677 }
2678
2679 edir->tls_mask |= eind->tls_mask;
2680 edir->has_sda_refs |= eind->has_sda_refs;
2681
2682 /* If called to transfer flags for a weakdef during processing
2683 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2684 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2685 if (!(ELIMINATE_COPY_RELOCS
2686 && eind->elf.root.type != bfd_link_hash_indirect
2687 && edir->elf.dynamic_adjusted))
2688 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2689
2690 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2691 edir->elf.ref_regular |= eind->elf.ref_regular;
2692 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2693 edir->elf.needs_plt |= eind->elf.needs_plt;
2694
2695 /* If we were called to copy over info for a weak sym, that's all. */
2696 if (eind->elf.root.type != bfd_link_hash_indirect)
2697 return;
2698
2699 /* Copy over the GOT refcount entries that we may have already seen to
2700 the symbol which just became indirect. */
2701 edir->elf.got.refcount += eind->elf.got.refcount;
2702 eind->elf.got.refcount = 0;
2703
2704 /* And plt entries. */
2705 if (eind->elf.plt.plist != NULL)
2706 {
2707 if (edir->elf.plt.plist != NULL)
2708 {
2709 struct plt_entry **entp;
2710 struct plt_entry *ent;
2711
2712 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2713 {
2714 struct plt_entry *dent;
2715
2716 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2717 if (dent->sec == ent->sec && dent->addend == ent->addend)
2718 {
2719 dent->plt.refcount += ent->plt.refcount;
2720 *entp = ent->next;
2721 break;
2722 }
2723 if (dent == NULL)
2724 entp = &ent->next;
2725 }
2726 *entp = edir->elf.plt.plist;
2727 }
2728
2729 edir->elf.plt.plist = eind->elf.plt.plist;
2730 eind->elf.plt.plist = NULL;
2731 }
2732
2733 if (eind->elf.dynindx != -1)
2734 {
2735 if (edir->elf.dynindx != -1)
2736 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2737 edir->elf.dynstr_index);
2738 edir->elf.dynindx = eind->elf.dynindx;
2739 edir->elf.dynstr_index = eind->elf.dynstr_index;
2740 eind->elf.dynindx = -1;
2741 eind->elf.dynstr_index = 0;
2742 }
2743 }
2744
2745 /* Return 1 if target is one of ours. */
2746
2747 static bfd_boolean
2748 is_ppc_elf_target (const struct bfd_target *targ)
2749 {
2750 extern const bfd_target bfd_elf32_powerpc_vec;
2751 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2752 extern const bfd_target bfd_elf32_powerpcle_vec;
2753
2754 return (targ == &bfd_elf32_powerpc_vec
2755 || targ == &bfd_elf32_powerpc_vxworks_vec
2756 || targ == &bfd_elf32_powerpcle_vec);
2757 }
2758
2759 /* Hook called by the linker routine which adds symbols from an object
2760 file. We use it to put .comm items in .sbss, and not .bss. */
2761
2762 static bfd_boolean
2763 ppc_elf_add_symbol_hook (bfd *abfd,
2764 struct bfd_link_info *info,
2765 Elf_Internal_Sym *sym,
2766 const char **namep ATTRIBUTE_UNUSED,
2767 flagword *flagsp ATTRIBUTE_UNUSED,
2768 asection **secp,
2769 bfd_vma *valp)
2770 {
2771 if (sym->st_shndx == SHN_COMMON
2772 && !info->relocatable
2773 && sym->st_size <= elf_gp_size (abfd)
2774 && is_ppc_elf_target (info->hash->creator))
2775 {
2776 /* Common symbols less than or equal to -G nn bytes are automatically
2777 put into .sbss. */
2778 struct ppc_elf_link_hash_table *htab;
2779
2780 htab = ppc_elf_hash_table (info);
2781 if (htab->sbss == NULL)
2782 {
2783 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2784
2785 if (!htab->elf.dynobj)
2786 htab->elf.dynobj = abfd;
2787
2788 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2789 ".sbss",
2790 flags);
2791 if (htab->sbss == NULL)
2792 return FALSE;
2793 }
2794
2795 *secp = htab->sbss;
2796 *valp = sym->st_size;
2797 }
2798
2799 return TRUE;
2800 }
2801 \f
2802 static bfd_boolean
2803 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2804 elf_linker_section_t *lsect)
2805 {
2806 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2807 TRUE, FALSE, TRUE);
2808 if (lsect->sym == NULL)
2809 return FALSE;
2810 if (lsect->sym->root.type == bfd_link_hash_new)
2811 lsect->sym->non_elf = 0;
2812 lsect->sym->ref_regular = 1;
2813 return TRUE;
2814 }
2815
2816 /* Create a special linker section. */
2817
2818 static bfd_boolean
2819 ppc_elf_create_linker_section (bfd *abfd,
2820 struct bfd_link_info *info,
2821 flagword flags,
2822 elf_linker_section_t *lsect)
2823 {
2824 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2825 asection *s;
2826
2827 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2828 | SEC_LINKER_CREATED);
2829
2830 /* Record the first bfd that needs the special sections. */
2831 if (!htab->elf.dynobj)
2832 htab->elf.dynobj = abfd;
2833
2834 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2835 lsect->name,
2836 flags);
2837 if (s == NULL
2838 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2839 return FALSE;
2840 lsect->section = s;
2841
2842 return create_sdata_sym (htab, lsect);
2843 }
2844
2845 /* Find a linker generated pointer with a given addend and type. */
2846
2847 static elf_linker_section_pointers_t *
2848 elf_find_pointer_linker_section
2849 (elf_linker_section_pointers_t *linker_pointers,
2850 bfd_vma addend,
2851 elf_linker_section_t *lsect)
2852 {
2853 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2854 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2855 return linker_pointers;
2856
2857 return NULL;
2858 }
2859
2860 /* Allocate a pointer to live in a linker created section. */
2861
2862 static bfd_boolean
2863 elf_create_pointer_linker_section (bfd *abfd,
2864 elf_linker_section_t *lsect,
2865 struct elf_link_hash_entry *h,
2866 const Elf_Internal_Rela *rel)
2867 {
2868 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2869 elf_linker_section_pointers_t *linker_section_ptr;
2870 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2871 bfd_size_type amt;
2872
2873 BFD_ASSERT (lsect != NULL);
2874
2875 /* Is this a global symbol? */
2876 if (h != NULL)
2877 {
2878 struct ppc_elf_link_hash_entry *eh;
2879
2880 /* Has this symbol already been allocated? If so, our work is done. */
2881 eh = (struct ppc_elf_link_hash_entry *) h;
2882 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2883 rel->r_addend,
2884 lsect))
2885 return TRUE;
2886
2887 ptr_linker_section_ptr = &eh->linker_section_pointer;
2888 }
2889 else
2890 {
2891 /* Allocation of a pointer to a local symbol. */
2892 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2893
2894 /* Allocate a table to hold the local symbols if first time. */
2895 if (!ptr)
2896 {
2897 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2898
2899 amt = num_symbols;
2900 amt *= sizeof (elf_linker_section_pointers_t *);
2901 ptr = bfd_zalloc (abfd, amt);
2902
2903 if (!ptr)
2904 return FALSE;
2905
2906 elf_local_ptr_offsets (abfd) = ptr;
2907 }
2908
2909 /* Has this symbol already been allocated? If so, our work is done. */
2910 if (elf_find_pointer_linker_section (ptr[r_symndx],
2911 rel->r_addend,
2912 lsect))
2913 return TRUE;
2914
2915 ptr_linker_section_ptr = &ptr[r_symndx];
2916 }
2917
2918 /* Allocate space for a pointer in the linker section, and allocate
2919 a new pointer record from internal memory. */
2920 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2921 amt = sizeof (elf_linker_section_pointers_t);
2922 linker_section_ptr = bfd_alloc (abfd, amt);
2923
2924 if (!linker_section_ptr)
2925 return FALSE;
2926
2927 linker_section_ptr->next = *ptr_linker_section_ptr;
2928 linker_section_ptr->addend = rel->r_addend;
2929 linker_section_ptr->lsect = lsect;
2930 *ptr_linker_section_ptr = linker_section_ptr;
2931
2932 linker_section_ptr->offset = lsect->section->size;
2933 lsect->section->size += 4;
2934
2935 #ifdef DEBUG
2936 fprintf (stderr,
2937 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2938 lsect->name, (long) linker_section_ptr->offset,
2939 (long) lsect->section->size);
2940 #endif
2941
2942 return TRUE;
2943 }
2944
2945 static bfd_boolean
2946 update_local_sym_info (bfd *abfd,
2947 Elf_Internal_Shdr *symtab_hdr,
2948 unsigned long r_symndx,
2949 int tls_type)
2950 {
2951 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2952 char *local_got_tls_masks;
2953
2954 if (local_got_refcounts == NULL)
2955 {
2956 bfd_size_type size = symtab_hdr->sh_info;
2957
2958 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2959 local_got_refcounts = bfd_zalloc (abfd, size);
2960 if (local_got_refcounts == NULL)
2961 return FALSE;
2962 elf_local_got_refcounts (abfd) = local_got_refcounts;
2963 }
2964
2965 local_got_refcounts[r_symndx] += 1;
2966 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2967 local_got_tls_masks[r_symndx] |= tls_type;
2968 return TRUE;
2969 }
2970
2971 static bfd_boolean
2972 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2973 asection *sec, bfd_vma addend)
2974 {
2975 struct plt_entry *ent;
2976
2977 if (addend < 32768)
2978 sec = NULL;
2979 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2980 if (ent->sec == sec && ent->addend == addend)
2981 break;
2982 if (ent == NULL)
2983 {
2984 bfd_size_type amt = sizeof (*ent);
2985 ent = bfd_alloc (abfd, amt);
2986 if (ent == NULL)
2987 return FALSE;
2988 ent->next = h->plt.plist;
2989 ent->sec = sec;
2990 ent->addend = addend;
2991 ent->plt.refcount = 0;
2992 h->plt.plist = ent;
2993 }
2994 ent->plt.refcount += 1;
2995 return TRUE;
2996 }
2997
2998 static struct plt_entry *
2999 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3000 {
3001 struct plt_entry *ent;
3002
3003 if (addend < 32768)
3004 sec = NULL;
3005 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3006 if (ent->sec == sec && ent->addend == addend)
3007 break;
3008 return ent;
3009 }
3010
3011 static void
3012 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3013 {
3014 (*_bfd_error_handler)
3015 (_("%B: relocation %s cannot be used when making a shared object"),
3016 abfd,
3017 ppc_elf_howto_table[r_type]->name);
3018 bfd_set_error (bfd_error_bad_value);
3019 }
3020
3021 /* Look through the relocs for a section during the first phase, and
3022 allocate space in the global offset table or procedure linkage
3023 table. */
3024
3025 static bfd_boolean
3026 ppc_elf_check_relocs (bfd *abfd,
3027 struct bfd_link_info *info,
3028 asection *sec,
3029 const Elf_Internal_Rela *relocs)
3030 {
3031 struct ppc_elf_link_hash_table *htab;
3032 Elf_Internal_Shdr *symtab_hdr;
3033 struct elf_link_hash_entry **sym_hashes;
3034 const Elf_Internal_Rela *rel;
3035 const Elf_Internal_Rela *rel_end;
3036 asection *got2, *sreloc;
3037
3038 if (info->relocatable)
3039 return TRUE;
3040
3041 /* Don't do anything special with non-loaded, non-alloced sections.
3042 In particular, any relocs in such sections should not affect GOT
3043 and PLT reference counting (ie. we don't allow them to create GOT
3044 or PLT entries), there's no possibility or desire to optimize TLS
3045 relocs, and there's not much point in propagating relocs to shared
3046 libs that the dynamic linker won't relocate. */
3047 if ((sec->flags & SEC_ALLOC) == 0)
3048 return TRUE;
3049
3050 #ifdef DEBUG
3051 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3052 sec, abfd);
3053 #endif
3054
3055 /* Initialize howto table if not already done. */
3056 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3057 ppc_elf_howto_init ();
3058
3059 htab = ppc_elf_hash_table (info);
3060 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3061 sym_hashes = elf_sym_hashes (abfd);
3062 got2 = bfd_get_section_by_name (abfd, ".got2");
3063 sreloc = NULL;
3064
3065 rel_end = relocs + sec->reloc_count;
3066 for (rel = relocs; rel < rel_end; rel++)
3067 {
3068 unsigned long r_symndx;
3069 enum elf_ppc_reloc_type r_type;
3070 struct elf_link_hash_entry *h;
3071 int tls_type = 0;
3072
3073 r_symndx = ELF32_R_SYM (rel->r_info);
3074 if (r_symndx < symtab_hdr->sh_info)
3075 h = NULL;
3076 else
3077 {
3078 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3079 while (h->root.type == bfd_link_hash_indirect
3080 || h->root.type == bfd_link_hash_warning)
3081 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3082 }
3083
3084 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3085 This shows up in particular in an R_PPC_ADDR32 in the eabi
3086 startup code. */
3087 if (h != NULL
3088 && htab->got == NULL
3089 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3090 {
3091 if (htab->elf.dynobj == NULL)
3092 htab->elf.dynobj = abfd;
3093 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3094 return FALSE;
3095 BFD_ASSERT (h == htab->elf.hgot);
3096 }
3097
3098 r_type = ELF32_R_TYPE (rel->r_info);
3099 switch (r_type)
3100 {
3101 case R_PPC_GOT_TLSLD16:
3102 case R_PPC_GOT_TLSLD16_LO:
3103 case R_PPC_GOT_TLSLD16_HI:
3104 case R_PPC_GOT_TLSLD16_HA:
3105 htab->tlsld_got.refcount += 1;
3106 tls_type = TLS_TLS | TLS_LD;
3107 goto dogottls;
3108
3109 case R_PPC_GOT_TLSGD16:
3110 case R_PPC_GOT_TLSGD16_LO:
3111 case R_PPC_GOT_TLSGD16_HI:
3112 case R_PPC_GOT_TLSGD16_HA:
3113 tls_type = TLS_TLS | TLS_GD;
3114 goto dogottls;
3115
3116 case R_PPC_GOT_TPREL16:
3117 case R_PPC_GOT_TPREL16_LO:
3118 case R_PPC_GOT_TPREL16_HI:
3119 case R_PPC_GOT_TPREL16_HA:
3120 if (info->shared)
3121 info->flags |= DF_STATIC_TLS;
3122 tls_type = TLS_TLS | TLS_TPREL;
3123 goto dogottls;
3124
3125 case R_PPC_GOT_DTPREL16:
3126 case R_PPC_GOT_DTPREL16_LO:
3127 case R_PPC_GOT_DTPREL16_HI:
3128 case R_PPC_GOT_DTPREL16_HA:
3129 tls_type = TLS_TLS | TLS_DTPREL;
3130 dogottls:
3131 sec->has_tls_reloc = 1;
3132 /* Fall thru */
3133
3134 /* GOT16 relocations */
3135 case R_PPC_GOT16:
3136 case R_PPC_GOT16_LO:
3137 case R_PPC_GOT16_HI:
3138 case R_PPC_GOT16_HA:
3139 /* This symbol requires a global offset table entry. */
3140 if (htab->got == NULL)
3141 {
3142 if (htab->elf.dynobj == NULL)
3143 htab->elf.dynobj = abfd;
3144 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3145 return FALSE;
3146 }
3147 if (h != NULL)
3148 {
3149 h->got.refcount += 1;
3150 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3151 }
3152 else
3153 /* This is a global offset table entry for a local symbol. */
3154 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3155 return FALSE;
3156 break;
3157
3158 /* Indirect .sdata relocation. */
3159 case R_PPC_EMB_SDAI16:
3160 if (info->shared)
3161 {
3162 bad_shared_reloc (abfd, r_type);
3163 return FALSE;
3164 }
3165 if (htab->sdata[0].section == NULL
3166 && !ppc_elf_create_linker_section (abfd, info, 0,
3167 &htab->sdata[0]))
3168 return FALSE;
3169 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3170 h, rel))
3171 return FALSE;
3172 if (h != NULL)
3173 {
3174 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3175 h->non_got_ref = TRUE;
3176 }
3177 break;
3178
3179 /* Indirect .sdata2 relocation. */
3180 case R_PPC_EMB_SDA2I16:
3181 if (info->shared)
3182 {
3183 bad_shared_reloc (abfd, r_type);
3184 return FALSE;
3185 }
3186 if (htab->sdata[1].section == NULL
3187 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3188 &htab->sdata[1]))
3189 return FALSE;
3190 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3191 h, rel))
3192 return FALSE;
3193 if (h != NULL)
3194 {
3195 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3196 h->non_got_ref = TRUE;
3197 }
3198 break;
3199
3200 case R_PPC_SDAREL16:
3201 if (info->shared)
3202 {
3203 bad_shared_reloc (abfd, r_type);
3204 return FALSE;
3205 }
3206 if (htab->sdata[0].sym == NULL
3207 && !create_sdata_sym (htab, &htab->sdata[0]))
3208 return FALSE;
3209 if (h != NULL)
3210 {
3211 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3212 h->non_got_ref = TRUE;
3213 }
3214 break;
3215
3216 case R_PPC_EMB_SDA2REL:
3217 if (info->shared)
3218 {
3219 bad_shared_reloc (abfd, r_type);
3220 return FALSE;
3221 }
3222 if (htab->sdata[1].sym == NULL
3223 && !create_sdata_sym (htab, &htab->sdata[1]))
3224 return FALSE;
3225 if (h != NULL)
3226 {
3227 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3228 h->non_got_ref = TRUE;
3229 }
3230 break;
3231
3232 case R_PPC_EMB_SDA21:
3233 case R_PPC_EMB_RELSDA:
3234 if (info->shared)
3235 {
3236 bad_shared_reloc (abfd, r_type);
3237 return FALSE;
3238 }
3239 if (htab->sdata[0].sym == NULL
3240 && !create_sdata_sym (htab, &htab->sdata[0]))
3241 return FALSE;
3242 if (htab->sdata[1].sym == NULL
3243 && !create_sdata_sym (htab, &htab->sdata[1]))
3244 return FALSE;
3245 if (h != NULL)
3246 {
3247 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3248 h->non_got_ref = TRUE;
3249 }
3250 break;
3251
3252 case R_PPC_EMB_NADDR32:
3253 case R_PPC_EMB_NADDR16:
3254 case R_PPC_EMB_NADDR16_LO:
3255 case R_PPC_EMB_NADDR16_HI:
3256 case R_PPC_EMB_NADDR16_HA:
3257 if (info->shared)
3258 {
3259 bad_shared_reloc (abfd, r_type);
3260 return FALSE;
3261 }
3262 if (h != NULL)
3263 h->non_got_ref = TRUE;
3264 break;
3265
3266 case R_PPC_PLT32:
3267 case R_PPC_PLTREL24:
3268 case R_PPC_PLTREL32:
3269 case R_PPC_PLT16_LO:
3270 case R_PPC_PLT16_HI:
3271 case R_PPC_PLT16_HA:
3272 #ifdef DEBUG
3273 fprintf (stderr, "Reloc requires a PLT entry\n");
3274 #endif
3275 /* This symbol requires a procedure linkage table entry. We
3276 actually build the entry in finish_dynamic_symbol,
3277 because this might be a case of linking PIC code without
3278 linking in any dynamic objects, in which case we don't
3279 need to generate a procedure linkage table after all. */
3280
3281 if (h == NULL)
3282 {
3283 /* It does not make sense to have a procedure linkage
3284 table entry for a local symbol. */
3285 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3286 "local symbol"),
3287 abfd,
3288 sec,
3289 (long) rel->r_offset,
3290 ppc_elf_howto_table[r_type]->name);
3291 bfd_set_error (bfd_error_bad_value);
3292 return FALSE;
3293 }
3294 else
3295 {
3296 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3297
3298 h->needs_plt = 1;
3299 if (!update_plt_info (abfd, h, got2, addend))
3300 return FALSE;
3301 }
3302 break;
3303
3304 /* The following relocations don't need to propagate the
3305 relocation if linking a shared object since they are
3306 section relative. */
3307 case R_PPC_SECTOFF:
3308 case R_PPC_SECTOFF_LO:
3309 case R_PPC_SECTOFF_HI:
3310 case R_PPC_SECTOFF_HA:
3311 case R_PPC_DTPREL16:
3312 case R_PPC_DTPREL16_LO:
3313 case R_PPC_DTPREL16_HI:
3314 case R_PPC_DTPREL16_HA:
3315 case R_PPC_TOC16:
3316 break;
3317
3318 case R_PPC_REL16:
3319 case R_PPC_REL16_LO:
3320 case R_PPC_REL16_HI:
3321 case R_PPC_REL16_HA:
3322 htab->can_use_new_plt = 1;
3323 break;
3324
3325 /* These are just markers. */
3326 case R_PPC_TLS:
3327 case R_PPC_EMB_MRKREF:
3328 case R_PPC_NONE:
3329 case R_PPC_max:
3330 break;
3331
3332 /* These should only appear in dynamic objects. */
3333 case R_PPC_COPY:
3334 case R_PPC_GLOB_DAT:
3335 case R_PPC_JMP_SLOT:
3336 case R_PPC_RELATIVE:
3337 break;
3338
3339 /* These aren't handled yet. We'll report an error later. */
3340 case R_PPC_ADDR30:
3341 case R_PPC_EMB_RELSEC16:
3342 case R_PPC_EMB_RELST_LO:
3343 case R_PPC_EMB_RELST_HI:
3344 case R_PPC_EMB_RELST_HA:
3345 case R_PPC_EMB_BIT_FLD:
3346 break;
3347
3348 /* This refers only to functions defined in the shared library. */
3349 case R_PPC_LOCAL24PC:
3350 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3351 htab->plt_type = PLT_OLD;
3352 break;
3353
3354 /* This relocation describes the C++ object vtable hierarchy.
3355 Reconstruct it for later use during GC. */
3356 case R_PPC_GNU_VTINHERIT:
3357 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3358 return FALSE;
3359 break;
3360
3361 /* This relocation describes which C++ vtable entries are actually
3362 used. Record for later use during GC. */
3363 case R_PPC_GNU_VTENTRY:
3364 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3365 return FALSE;
3366 break;
3367
3368 /* We shouldn't really be seeing these. */
3369 case R_PPC_TPREL32:
3370 if (info->shared)
3371 info->flags |= DF_STATIC_TLS;
3372 goto dodyn;
3373
3374 /* Nor these. */
3375 case R_PPC_DTPMOD32:
3376 case R_PPC_DTPREL32:
3377 goto dodyn;
3378
3379 case R_PPC_TPREL16:
3380 case R_PPC_TPREL16_LO:
3381 case R_PPC_TPREL16_HI:
3382 case R_PPC_TPREL16_HA:
3383 if (info->shared)
3384 info->flags |= DF_STATIC_TLS;
3385 goto dodyn;
3386
3387 case R_PPC_REL32:
3388 if (h == NULL
3389 && got2 != NULL
3390 && (sec->flags & SEC_CODE) != 0
3391 && (info->shared || info->pie)
3392 && htab->plt_type == PLT_UNSET)
3393 {
3394 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3395 the start of a function, which assembles to a REL32
3396 reference to .got2. If we detect one of these, then
3397 force the old PLT layout because the linker cannot
3398 reliably deduce the GOT pointer value needed for
3399 PLT call stubs. */
3400 asection *s;
3401
3402 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3403 r_symndx);
3404 if (s == got2)
3405 htab->plt_type = PLT_OLD;
3406 }
3407 if (h == NULL || h == htab->elf.hgot)
3408 break;
3409 goto dodyn1;
3410
3411 case R_PPC_REL24:
3412 case R_PPC_REL14:
3413 case R_PPC_REL14_BRTAKEN:
3414 case R_PPC_REL14_BRNTAKEN:
3415 if (h == NULL)
3416 break;
3417 if (h == htab->elf.hgot)
3418 {
3419 if (htab->plt_type == PLT_UNSET)
3420 htab->plt_type = PLT_OLD;
3421 break;
3422 }
3423 /* fall through */
3424
3425 case R_PPC_ADDR32:
3426 case R_PPC_ADDR24:
3427 case R_PPC_ADDR16:
3428 case R_PPC_ADDR16_LO:
3429 case R_PPC_ADDR16_HI:
3430 case R_PPC_ADDR16_HA:
3431 case R_PPC_ADDR14:
3432 case R_PPC_ADDR14_BRTAKEN:
3433 case R_PPC_ADDR14_BRNTAKEN:
3434 case R_PPC_UADDR32:
3435 case R_PPC_UADDR16:
3436 dodyn1:
3437 if (h != NULL && !info->shared)
3438 {
3439 /* We may need a plt entry if the symbol turns out to be
3440 a function defined in a dynamic object. */
3441 if (!update_plt_info (abfd, h, NULL, 0))
3442 return FALSE;
3443
3444 /* We may need a copy reloc too. */
3445 h->non_got_ref = 1;
3446 }
3447
3448 dodyn:
3449 /* If we are creating a shared library, and this is a reloc
3450 against a global symbol, or a non PC relative reloc
3451 against a local symbol, then we need to copy the reloc
3452 into the shared library. However, if we are linking with
3453 -Bsymbolic, we do not need to copy a reloc against a
3454 global symbol which is defined in an object we are
3455 including in the link (i.e., DEF_REGULAR is set). At
3456 this point we have not seen all the input files, so it is
3457 possible that DEF_REGULAR is not set now but will be set
3458 later (it is never cleared). In case of a weak definition,
3459 DEF_REGULAR may be cleared later by a strong definition in
3460 a shared library. We account for that possibility below by
3461 storing information in the dyn_relocs field of the hash
3462 table entry. A similar situation occurs when creating
3463 shared libraries and symbol visibility changes render the
3464 symbol local.
3465
3466 If on the other hand, we are creating an executable, we
3467 may need to keep relocations for symbols satisfied by a
3468 dynamic library if we manage to avoid copy relocs for the
3469 symbol. */
3470 if ((info->shared
3471 && (MUST_BE_DYN_RELOC (r_type)
3472 || (h != NULL
3473 && (! info->symbolic
3474 || h->root.type == bfd_link_hash_defweak
3475 || !h->def_regular))))
3476 || (ELIMINATE_COPY_RELOCS
3477 && !info->shared
3478 && h != NULL
3479 && (h->root.type == bfd_link_hash_defweak
3480 || !h->def_regular)))
3481 {
3482 struct ppc_elf_dyn_relocs *p;
3483 struct ppc_elf_dyn_relocs **head;
3484
3485 #ifdef DEBUG
3486 fprintf (stderr,
3487 "ppc_elf_check_relocs needs to "
3488 "create relocation for %s\n",
3489 (h && h->root.root.string
3490 ? h->root.root.string : "<unknown>"));
3491 #endif
3492 if (sreloc == NULL)
3493 {
3494 const char *name;
3495
3496 name = (bfd_elf_string_from_elf_section
3497 (abfd,
3498 elf_elfheader (abfd)->e_shstrndx,
3499 elf_section_data (sec)->rel_hdr.sh_name));
3500 if (name == NULL)
3501 return FALSE;
3502
3503 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3504 && strcmp (bfd_get_section_name (abfd, sec),
3505 name + 5) == 0);
3506
3507 if (htab->elf.dynobj == NULL)
3508 htab->elf.dynobj = abfd;
3509 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3510 if (sreloc == NULL)
3511 {
3512 flagword flags;
3513
3514 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3515 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3516 | SEC_ALLOC | SEC_LOAD);
3517 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3518 name,
3519 flags);
3520 if (sreloc == NULL
3521 || ! bfd_set_section_alignment (htab->elf.dynobj,
3522 sreloc, 2))
3523 return FALSE;
3524 }
3525 elf_section_data (sec)->sreloc = sreloc;
3526 }
3527
3528 /* If this is a global symbol, we count the number of
3529 relocations we need for this symbol. */
3530 if (h != NULL)
3531 {
3532 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3533 }
3534 else
3535 {
3536 /* Track dynamic relocs needed for local syms too.
3537 We really need local syms available to do this
3538 easily. Oh well. */
3539
3540 asection *s;
3541 void *vpp;
3542
3543 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3544 sec, r_symndx);
3545 if (s == NULL)
3546 return FALSE;
3547
3548 vpp = &elf_section_data (s)->local_dynrel;
3549 head = (struct ppc_elf_dyn_relocs **) vpp;
3550 }
3551
3552 p = *head;
3553 if (p == NULL || p->sec != sec)
3554 {
3555 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3556 if (p == NULL)
3557 return FALSE;
3558 p->next = *head;
3559 *head = p;
3560 p->sec = sec;
3561 p->count = 0;
3562 p->pc_count = 0;
3563 }
3564
3565 p->count += 1;
3566 if (!MUST_BE_DYN_RELOC (r_type))
3567 p->pc_count += 1;
3568 }
3569
3570 break;
3571 }
3572 }
3573
3574 return TRUE;
3575 }
3576 \f
3577 /* Merge backend specific data from an object file to the output
3578 object file when linking. */
3579
3580 static bfd_boolean
3581 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3582 {
3583 flagword old_flags;
3584 flagword new_flags;
3585 bfd_boolean error;
3586
3587 if (!is_ppc_elf_target (ibfd->xvec)
3588 || !is_ppc_elf_target (obfd->xvec))
3589 return TRUE;
3590
3591 /* Check if we have the same endianess. */
3592 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3593 return FALSE;
3594
3595 new_flags = elf_elfheader (ibfd)->e_flags;
3596 old_flags = elf_elfheader (obfd)->e_flags;
3597 if (!elf_flags_init (obfd))
3598 {
3599 /* First call, no flags set. */
3600 elf_flags_init (obfd) = TRUE;
3601 elf_elfheader (obfd)->e_flags = new_flags;
3602 }
3603
3604 /* Compatible flags are ok. */
3605 else if (new_flags == old_flags)
3606 ;
3607
3608 /* Incompatible flags. */
3609 else
3610 {
3611 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3612 to be linked with either. */
3613 error = FALSE;
3614 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3615 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3616 {
3617 error = TRUE;
3618 (*_bfd_error_handler)
3619 (_("%B: compiled with -mrelocatable and linked with "
3620 "modules compiled normally"), ibfd);
3621 }
3622 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3623 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3624 {
3625 error = TRUE;
3626 (*_bfd_error_handler)
3627 (_("%B: compiled normally and linked with "
3628 "modules compiled with -mrelocatable"), ibfd);
3629 }
3630
3631 /* The output is -mrelocatable-lib iff both the input files are. */
3632 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3633 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3634
3635 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3636 but each input file is either -mrelocatable or -mrelocatable-lib. */
3637 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3638 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3639 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3640 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3641
3642 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3643 any module uses it. */
3644 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3645
3646 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3647 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3648
3649 /* Warn about any other mismatches. */
3650 if (new_flags != old_flags)
3651 {
3652 error = TRUE;
3653 (*_bfd_error_handler)
3654 (_("%B: uses different e_flags (0x%lx) fields "
3655 "than previous modules (0x%lx)"),
3656 ibfd, (long) new_flags, (long) old_flags);
3657 }
3658
3659 if (error)
3660 {
3661 bfd_set_error (bfd_error_bad_value);
3662 return FALSE;
3663 }
3664 }
3665
3666 return TRUE;
3667 }
3668 \f
3669 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3670 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3671 int
3672 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3673 struct bfd_link_info *info,
3674 int force_old_plt,
3675 int emit_stub_syms)
3676 {
3677 struct ppc_elf_link_hash_table *htab;
3678 flagword flags;
3679
3680 htab = ppc_elf_hash_table (info);
3681
3682 if (htab->plt_type == PLT_UNSET)
3683 htab->plt_type = (force_old_plt || !htab->can_use_new_plt
3684 ? PLT_OLD : PLT_NEW);
3685
3686 htab->emit_stub_syms = emit_stub_syms;
3687
3688 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3689
3690 if (htab->plt_type == PLT_NEW)
3691 {
3692 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3693 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3694
3695 /* The new PLT is a loaded section. */
3696 if (htab->plt != NULL
3697 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3698 return -1;
3699
3700 /* The new GOT is not executable. */
3701 if (htab->got != NULL
3702 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3703 return -1;
3704 }
3705 else
3706 {
3707 /* Stop an unused .glink section from affecting .text alignment. */
3708 if (htab->glink != NULL
3709 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3710 return -1;
3711 }
3712 return htab->plt_type == PLT_NEW;
3713 }
3714 \f
3715 /* Return the section that should be marked against GC for a given
3716 relocation. */
3717
3718 static asection *
3719 ppc_elf_gc_mark_hook (asection *sec,
3720 struct bfd_link_info *info,
3721 Elf_Internal_Rela *rel,
3722 struct elf_link_hash_entry *h,
3723 Elf_Internal_Sym *sym)
3724 {
3725 if (h != NULL)
3726 switch (ELF32_R_TYPE (rel->r_info))
3727 {
3728 case R_PPC_GNU_VTINHERIT:
3729 case R_PPC_GNU_VTENTRY:
3730 return NULL;
3731 }
3732
3733 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3734 }
3735
3736 /* Update the got, plt and dynamic reloc reference counts for the
3737 section being removed. */
3738
3739 static bfd_boolean
3740 ppc_elf_gc_sweep_hook (bfd *abfd,
3741 struct bfd_link_info *info,
3742 asection *sec,
3743 const Elf_Internal_Rela *relocs)
3744 {
3745 struct ppc_elf_link_hash_table *htab;
3746 Elf_Internal_Shdr *symtab_hdr;
3747 struct elf_link_hash_entry **sym_hashes;
3748 bfd_signed_vma *local_got_refcounts;
3749 const Elf_Internal_Rela *rel, *relend;
3750 asection *got2;
3751
3752 if ((sec->flags & SEC_ALLOC) == 0)
3753 return TRUE;
3754
3755 elf_section_data (sec)->local_dynrel = NULL;
3756
3757 htab = ppc_elf_hash_table (info);
3758 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3759 sym_hashes = elf_sym_hashes (abfd);
3760 local_got_refcounts = elf_local_got_refcounts (abfd);
3761 got2 = bfd_get_section_by_name (abfd, ".got2");
3762
3763 relend = relocs + sec->reloc_count;
3764 for (rel = relocs; rel < relend; rel++)
3765 {
3766 unsigned long r_symndx;
3767 enum elf_ppc_reloc_type r_type;
3768 struct elf_link_hash_entry *h = NULL;
3769
3770 r_symndx = ELF32_R_SYM (rel->r_info);
3771 if (r_symndx >= symtab_hdr->sh_info)
3772 {
3773 struct ppc_elf_dyn_relocs **pp, *p;
3774 struct ppc_elf_link_hash_entry *eh;
3775
3776 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3777 while (h->root.type == bfd_link_hash_indirect
3778 || h->root.type == bfd_link_hash_warning)
3779 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3780 eh = (struct ppc_elf_link_hash_entry *) h;
3781
3782 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3783 if (p->sec == sec)
3784 {
3785 /* Everything must go for SEC. */
3786 *pp = p->next;
3787 break;
3788 }
3789 }
3790
3791 r_type = ELF32_R_TYPE (rel->r_info);
3792 switch (r_type)
3793 {
3794 case R_PPC_GOT_TLSLD16:
3795 case R_PPC_GOT_TLSLD16_LO:
3796 case R_PPC_GOT_TLSLD16_HI:
3797 case R_PPC_GOT_TLSLD16_HA:
3798 htab->tlsld_got.refcount -= 1;
3799 /* Fall thru */
3800
3801 case R_PPC_GOT_TLSGD16:
3802 case R_PPC_GOT_TLSGD16_LO:
3803 case R_PPC_GOT_TLSGD16_HI:
3804 case R_PPC_GOT_TLSGD16_HA:
3805 case R_PPC_GOT_TPREL16:
3806 case R_PPC_GOT_TPREL16_LO:
3807 case R_PPC_GOT_TPREL16_HI:
3808 case R_PPC_GOT_TPREL16_HA:
3809 case R_PPC_GOT_DTPREL16:
3810 case R_PPC_GOT_DTPREL16_LO:
3811 case R_PPC_GOT_DTPREL16_HI:
3812 case R_PPC_GOT_DTPREL16_HA:
3813 case R_PPC_GOT16:
3814 case R_PPC_GOT16_LO:
3815 case R_PPC_GOT16_HI:
3816 case R_PPC_GOT16_HA:
3817 if (h != NULL)
3818 {
3819 if (h->got.refcount > 0)
3820 h->got.refcount--;
3821 }
3822 else if (local_got_refcounts != NULL)
3823 {
3824 if (local_got_refcounts[r_symndx] > 0)
3825 local_got_refcounts[r_symndx]--;
3826 }
3827 break;
3828
3829 case R_PPC_REL24:
3830 case R_PPC_REL14:
3831 case R_PPC_REL14_BRTAKEN:
3832 case R_PPC_REL14_BRNTAKEN:
3833 case R_PPC_REL32:
3834 if (h == NULL || h == htab->elf.hgot)
3835 break;
3836 /* Fall thru */
3837
3838 case R_PPC_ADDR32:
3839 case R_PPC_ADDR24:
3840 case R_PPC_ADDR16:
3841 case R_PPC_ADDR16_LO:
3842 case R_PPC_ADDR16_HI:
3843 case R_PPC_ADDR16_HA:
3844 case R_PPC_ADDR14:
3845 case R_PPC_ADDR14_BRTAKEN:
3846 case R_PPC_ADDR14_BRNTAKEN:
3847 case R_PPC_UADDR32:
3848 case R_PPC_UADDR16:
3849 if (info->shared)
3850 break;
3851
3852 case R_PPC_PLT32:
3853 case R_PPC_PLTREL24:
3854 case R_PPC_PLTREL32:
3855 case R_PPC_PLT16_LO:
3856 case R_PPC_PLT16_HI:
3857 case R_PPC_PLT16_HA:
3858 if (h != NULL)
3859 {
3860 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3861 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3862 if (ent->plt.refcount > 0)
3863 ent->plt.refcount -= 1;
3864 }
3865 break;
3866
3867 default:
3868 break;
3869 }
3870 }
3871 return TRUE;
3872 }
3873 \f
3874 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3875
3876 asection *
3877 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3878 {
3879 struct ppc_elf_link_hash_table *htab;
3880
3881 htab = ppc_elf_hash_table (info);
3882 if (htab->plt_type == PLT_NEW
3883 && htab->plt != NULL
3884 && htab->plt->output_section != NULL)
3885 {
3886 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3887 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3888 }
3889
3890 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3891 FALSE, FALSE, TRUE);
3892 return _bfd_elf_tls_setup (obfd, info);
3893 }
3894
3895 /* Run through all the TLS relocs looking for optimization
3896 opportunities. */
3897
3898 bfd_boolean
3899 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3900 struct bfd_link_info *info)
3901 {
3902 bfd *ibfd;
3903 asection *sec;
3904 struct ppc_elf_link_hash_table *htab;
3905
3906 if (info->relocatable || info->shared)
3907 return TRUE;
3908
3909 htab = ppc_elf_hash_table (info);
3910 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3911 {
3912 Elf_Internal_Sym *locsyms = NULL;
3913 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3914
3915 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3916 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3917 {
3918 Elf_Internal_Rela *relstart, *rel, *relend;
3919 int expecting_tls_get_addr;
3920
3921 /* Read the relocations. */
3922 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3923 info->keep_memory);
3924 if (relstart == NULL)
3925 return FALSE;
3926
3927 expecting_tls_get_addr = 0;
3928 relend = relstart + sec->reloc_count;
3929 for (rel = relstart; rel < relend; rel++)
3930 {
3931 enum elf_ppc_reloc_type r_type;
3932 unsigned long r_symndx;
3933 struct elf_link_hash_entry *h = NULL;
3934 char *tls_mask;
3935 char tls_set, tls_clear;
3936 bfd_boolean is_local;
3937
3938 r_symndx = ELF32_R_SYM (rel->r_info);
3939 if (r_symndx >= symtab_hdr->sh_info)
3940 {
3941 struct elf_link_hash_entry **sym_hashes;
3942
3943 sym_hashes = elf_sym_hashes (ibfd);
3944 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3945 while (h->root.type == bfd_link_hash_indirect
3946 || h->root.type == bfd_link_hash_warning)
3947 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3948 }
3949
3950 is_local = FALSE;
3951 if (h == NULL
3952 || !h->def_dynamic)
3953 is_local = TRUE;
3954
3955 r_type = ELF32_R_TYPE (rel->r_info);
3956 switch (r_type)
3957 {
3958 case R_PPC_GOT_TLSLD16:
3959 case R_PPC_GOT_TLSLD16_LO:
3960 case R_PPC_GOT_TLSLD16_HI:
3961 case R_PPC_GOT_TLSLD16_HA:
3962 /* These relocs should never be against a symbol
3963 defined in a shared lib. Leave them alone if
3964 that turns out to be the case. */
3965 expecting_tls_get_addr = 0;
3966 htab->tlsld_got.refcount -= 1;
3967 if (!is_local)
3968 continue;
3969
3970 /* LD -> LE */
3971 tls_set = 0;
3972 tls_clear = TLS_LD;
3973 expecting_tls_get_addr = 1;
3974 break;
3975
3976 case R_PPC_GOT_TLSGD16:
3977 case R_PPC_GOT_TLSGD16_LO:
3978 case R_PPC_GOT_TLSGD16_HI:
3979 case R_PPC_GOT_TLSGD16_HA:
3980 if (is_local)
3981 /* GD -> LE */
3982 tls_set = 0;
3983 else
3984 /* GD -> IE */
3985 tls_set = TLS_TLS | TLS_TPRELGD;
3986 tls_clear = TLS_GD;
3987 expecting_tls_get_addr = 1;
3988 break;
3989
3990 case R_PPC_GOT_TPREL16:
3991 case R_PPC_GOT_TPREL16_LO:
3992 case R_PPC_GOT_TPREL16_HI:
3993 case R_PPC_GOT_TPREL16_HA:
3994 expecting_tls_get_addr = 0;
3995 if (is_local)
3996 {
3997 /* IE -> LE */
3998 tls_set = 0;
3999 tls_clear = TLS_TPREL;
4000 break;
4001 }
4002 else
4003 continue;
4004
4005 case R_PPC_REL14:
4006 case R_PPC_REL14_BRTAKEN:
4007 case R_PPC_REL14_BRNTAKEN:
4008 case R_PPC_REL24:
4009 if (expecting_tls_get_addr
4010 && h != NULL
4011 && h == htab->tls_get_addr)
4012 {
4013 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
4014 if (ent != NULL && ent->plt.refcount > 0)
4015 ent->plt.refcount -= 1;
4016 }
4017 expecting_tls_get_addr = 0;
4018 continue;
4019
4020 default:
4021 expecting_tls_get_addr = 0;
4022 continue;
4023 }
4024
4025 if (h != NULL)
4026 {
4027 if (tls_set == 0)
4028 {
4029 /* We managed to get rid of a got entry. */
4030 if (h->got.refcount > 0)
4031 h->got.refcount -= 1;
4032 }
4033 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4034 }
4035 else
4036 {
4037 Elf_Internal_Sym *sym;
4038 bfd_signed_vma *lgot_refs;
4039 char *lgot_masks;
4040
4041 if (locsyms == NULL)
4042 {
4043 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4044 if (locsyms == NULL)
4045 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4046 symtab_hdr->sh_info,
4047 0, NULL, NULL, NULL);
4048 if (locsyms == NULL)
4049 {
4050 if (elf_section_data (sec)->relocs != relstart)
4051 free (relstart);
4052 return FALSE;
4053 }
4054 }
4055 sym = locsyms + r_symndx;
4056 lgot_refs = elf_local_got_refcounts (ibfd);
4057 if (lgot_refs == NULL)
4058 abort ();
4059 if (tls_set == 0)
4060 {
4061 /* We managed to get rid of a got entry. */
4062 if (lgot_refs[r_symndx] > 0)
4063 lgot_refs[r_symndx] -= 1;
4064 }
4065 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4066 tls_mask = &lgot_masks[r_symndx];
4067 }
4068
4069 *tls_mask |= tls_set;
4070 *tls_mask &= ~tls_clear;
4071 }
4072
4073 if (elf_section_data (sec)->relocs != relstart)
4074 free (relstart);
4075 }
4076
4077 if (locsyms != NULL
4078 && (symtab_hdr->contents != (unsigned char *) locsyms))
4079 {
4080 if (!info->keep_memory)
4081 free (locsyms);
4082 else
4083 symtab_hdr->contents = (unsigned char *) locsyms;
4084 }
4085 }
4086 return TRUE;
4087 }
4088 \f
4089 /* Adjust a symbol defined by a dynamic object and referenced by a
4090 regular object. The current definition is in some section of the
4091 dynamic object, but we're not including those sections. We have to
4092 change the definition to something the rest of the link can
4093 understand. */
4094
4095 static bfd_boolean
4096 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4097 struct elf_link_hash_entry *h)
4098 {
4099 struct ppc_elf_link_hash_table *htab;
4100 asection *s;
4101 unsigned int power_of_two;
4102
4103 #ifdef DEBUG
4104 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4105 h->root.root.string);
4106 #endif
4107
4108 /* Make sure we know what is going on here. */
4109 htab = ppc_elf_hash_table (info);
4110 BFD_ASSERT (htab->elf.dynobj != NULL
4111 && (h->needs_plt
4112 || h->u.weakdef != NULL
4113 || (h->def_dynamic
4114 && h->ref_regular
4115 && !h->def_regular)));
4116
4117 /* Deal with function syms. */
4118 if (h->type == STT_FUNC
4119 || h->needs_plt)
4120 {
4121 /* Clear procedure linkage table information for any symbol that
4122 won't need a .plt entry. */
4123 struct plt_entry *ent;
4124 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4125 if (ent->plt.refcount > 0)
4126 break;
4127 if (ent == NULL
4128 || SYMBOL_CALLS_LOCAL (info, h)
4129 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4130 && h->root.type == bfd_link_hash_undefweak))
4131 {
4132 /* A PLT entry is not required/allowed when:
4133
4134 1. We are not using ld.so; because then the PLT entry
4135 can't be set up, so we can't use one. In this case,
4136 ppc_elf_adjust_dynamic_symbol won't even be called.
4137
4138 2. GC has rendered the entry unused.
4139
4140 3. We know for certain that a call to this symbol
4141 will go to this object, or will remain undefined. */
4142 h->plt.plist = NULL;
4143 h->needs_plt = 0;
4144 }
4145 return TRUE;
4146 }
4147 else
4148 h->plt.plist = NULL;
4149
4150 /* If this is a weak symbol, and there is a real definition, the
4151 processor independent code will have arranged for us to see the
4152 real definition first, and we can just use the same value. */
4153 if (h->u.weakdef != NULL)
4154 {
4155 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4156 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4157 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4158 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4159 if (ELIMINATE_COPY_RELOCS)
4160 h->non_got_ref = h->u.weakdef->non_got_ref;
4161 return TRUE;
4162 }
4163
4164 /* This is a reference to a symbol defined by a dynamic object which
4165 is not a function. */
4166
4167 /* If we are creating a shared library, we must presume that the
4168 only references to the symbol are via the global offset table.
4169 For such cases we need not do anything here; the relocations will
4170 be handled correctly by relocate_section. */
4171 if (info->shared)
4172 return TRUE;
4173
4174 /* If there are no references to this symbol that do not use the
4175 GOT, we don't need to generate a copy reloc. */
4176 if (!h->non_got_ref)
4177 return TRUE;
4178
4179 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4180 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4181 do this if there are any small data relocations. */
4182 if (ELIMINATE_COPY_RELOCS
4183 && !ppc_elf_hash_entry (h)->has_sda_refs)
4184 {
4185 struct ppc_elf_dyn_relocs *p;
4186 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4187 {
4188 s = p->sec->output_section;
4189 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4190 break;
4191 }
4192
4193 if (p == NULL)
4194 {
4195 h->non_got_ref = 0;
4196 return TRUE;
4197 }
4198 }
4199
4200 if (h->size == 0)
4201 {
4202 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4203 h->root.root.string);
4204 return TRUE;
4205 }
4206
4207 /* We must allocate the symbol in our .dynbss section, which will
4208 become part of the .bss section of the executable. There will be
4209 an entry for this symbol in the .dynsym section. The dynamic
4210 object will contain position independent code, so all references
4211 from the dynamic object to this symbol will go through the global
4212 offset table. The dynamic linker will use the .dynsym entry to
4213 determine the address it must put in the global offset table, so
4214 both the dynamic object and the regular object will refer to the
4215 same memory location for the variable.
4216
4217 Of course, if the symbol is referenced using SDAREL relocs, we
4218 must instead allocate it in .sbss. */
4219
4220 if (ppc_elf_hash_entry (h)->has_sda_refs)
4221 s = htab->dynsbss;
4222 else
4223 s = htab->dynbss;
4224 BFD_ASSERT (s != NULL);
4225
4226 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4227 copy the initial value out of the dynamic object and into the
4228 runtime process image. We need to remember the offset into the
4229 .rela.bss section we are going to use. */
4230 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4231 {
4232 asection *srel;
4233
4234 if (ppc_elf_hash_entry (h)->has_sda_refs)
4235 srel = htab->relsbss;
4236 else
4237 srel = htab->relbss;
4238 BFD_ASSERT (srel != NULL);
4239 srel->size += sizeof (Elf32_External_Rela);
4240 h->needs_copy = 1;
4241 }
4242
4243 /* We need to figure out the alignment required for this symbol. I
4244 have no idea how ELF linkers handle this. */
4245 power_of_two = bfd_log2 (h->size);
4246 if (power_of_two > 4)
4247 power_of_two = 4;
4248
4249 /* Apply the required alignment. */
4250 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4251 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4252 {
4253 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4254 return FALSE;
4255 }
4256
4257 /* Define the symbol as being at this point in the section. */
4258 h->root.u.def.section = s;
4259 h->root.u.def.value = s->size;
4260
4261 /* Increment the section size to make room for the symbol. */
4262 s->size += h->size;
4263
4264 return TRUE;
4265 }
4266 \f
4267 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4268 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4269 specifying the addend on the plt relocation. For -fpic code, the sym
4270 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4271 xxxxxxxx.got2.plt_pic32.<callee>. */
4272
4273 static bfd_boolean
4274 add_stub_sym (struct plt_entry *ent,
4275 struct elf_link_hash_entry *h,
4276 struct bfd_link_info *info)
4277 {
4278 struct elf_link_hash_entry *sh;
4279 size_t len1, len2, len3;
4280 char *name;
4281 const char *stub;
4282 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4283
4284 if (info->shared || info->pie)
4285 stub = ".plt_pic32.";
4286 else
4287 stub = ".plt_call32.";
4288
4289 len1 = strlen (h->root.root.string);
4290 len2 = strlen (stub);
4291 len3 = 0;
4292 if (ent->sec)
4293 len3 = strlen (ent->sec->name);
4294 name = bfd_malloc (len1 + len2 + len3 + 9);
4295 if (name == NULL)
4296 return FALSE;
4297 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4298 if (ent->sec)
4299 memcpy (name + 8, ent->sec->name, len3);
4300 memcpy (name + 8 + len3, stub, len2);
4301 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4302 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4303 if (sh == NULL)
4304 return FALSE;
4305 if (sh->root.type == bfd_link_hash_new)
4306 {
4307 sh->root.type = bfd_link_hash_defined;
4308 sh->root.u.def.section = htab->glink;
4309 sh->root.u.def.value = ent->glink_offset;
4310 sh->ref_regular = 1;
4311 sh->def_regular = 1;
4312 sh->ref_regular_nonweak = 1;
4313 sh->forced_local = 1;
4314 sh->non_elf = 0;
4315 }
4316 return TRUE;
4317 }
4318
4319 /* Allocate NEED contiguous space in .got, and return the offset.
4320 Handles allocation of the got header when crossing 32k. */
4321
4322 static bfd_vma
4323 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4324 {
4325 bfd_vma where;
4326 unsigned int max_before_header;
4327
4328 if (htab->plt_type == PLT_VXWORKS)
4329 {
4330 where = htab->got->size;
4331 htab->got->size += need;
4332 }
4333 else
4334 {
4335 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4336 if (need <= htab->got_gap)
4337 {
4338 where = max_before_header - htab->got_gap;
4339 htab->got_gap -= need;
4340 }
4341 else
4342 {
4343 if (htab->got->size + need > max_before_header
4344 && htab->got->size <= max_before_header)
4345 {
4346 htab->got_gap = max_before_header - htab->got->size;
4347 htab->got->size = max_before_header + htab->got_header_size;
4348 }
4349 where = htab->got->size;
4350 htab->got->size += need;
4351 }
4352 }
4353 return where;
4354 }
4355
4356 /* Allocate space in associated reloc sections for dynamic relocs. */
4357
4358 static bfd_boolean
4359 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4360 {
4361 struct bfd_link_info *info = inf;
4362 struct ppc_elf_link_hash_entry *eh;
4363 struct ppc_elf_link_hash_table *htab;
4364 struct ppc_elf_dyn_relocs *p;
4365
4366 if (h->root.type == bfd_link_hash_indirect)
4367 return TRUE;
4368
4369 if (h->root.type == bfd_link_hash_warning)
4370 /* When warning symbols are created, they **replace** the "real"
4371 entry in the hash table, thus we never get to see the real
4372 symbol in a hash traversal. So look at it now. */
4373 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4374
4375 htab = ppc_elf_hash_table (info);
4376 if (htab->elf.dynamic_sections_created)
4377 {
4378 struct plt_entry *ent;
4379 bfd_boolean doneone = FALSE;
4380 bfd_vma plt_offset = 0, glink_offset = 0;
4381
4382 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4383 if (ent->plt.refcount > 0)
4384 {
4385 /* Make sure this symbol is output as a dynamic symbol. */
4386 if (h->dynindx == -1
4387 && !h->forced_local)
4388 {
4389 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4390 return FALSE;
4391 }
4392
4393 if (info->shared
4394 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4395 {
4396 asection *s = htab->plt;
4397
4398 if (htab->plt_type == PLT_NEW)
4399 {
4400 if (!doneone)
4401 {
4402 plt_offset = s->size;
4403 s->size += 4;
4404 }
4405 ent->plt.offset = plt_offset;
4406
4407 s = htab->glink;
4408 if (!doneone || info->shared || info->pie)
4409 {
4410 glink_offset = s->size;
4411 s->size += GLINK_ENTRY_SIZE;
4412 }
4413 if (!doneone
4414 && !info->shared
4415 && !h->def_regular)
4416 {
4417 h->root.u.def.section = s;
4418 h->root.u.def.value = glink_offset;
4419 }
4420 ent->glink_offset = glink_offset;
4421
4422 if (htab->emit_stub_syms
4423 && !add_stub_sym (ent, h, info))
4424 return FALSE;
4425 }
4426 else
4427 {
4428 if (!doneone)
4429 {
4430 /* If this is the first .plt entry, make room
4431 for the special first entry. */
4432 if (s->size == 0)
4433 s->size += htab->plt_initial_entry_size;
4434
4435 /* The PowerPC PLT is actually composed of two
4436 parts, the first part is 2 words (for a load
4437 and a jump), and then there is a remaining
4438 word available at the end. */
4439 plt_offset = (htab->plt_initial_entry_size
4440 + (htab->plt_slot_size
4441 * ((s->size
4442 - htab->plt_initial_entry_size)
4443 / htab->plt_entry_size)));
4444
4445 /* If this symbol is not defined in a regular
4446 file, and we are not generating a shared
4447 library, then set the symbol to this location
4448 in the .plt. This is required to make
4449 function pointers compare as equal between
4450 the normal executable and the shared library. */
4451 if (! info->shared
4452 && !h->def_regular)
4453 {
4454 h->root.u.def.section = s;
4455 h->root.u.def.value = plt_offset;
4456 }
4457
4458 /* Make room for this entry. */
4459 s->size += htab->plt_entry_size;
4460 /* After the 8192nd entry, room for two entries
4461 is allocated. */
4462 if (htab->plt_type == PLT_OLD
4463 && (s->size - htab->plt_initial_entry_size)
4464 / htab->plt_entry_size
4465 > PLT_NUM_SINGLE_ENTRIES)
4466 s->size += htab->plt_entry_size;
4467 }
4468 ent->plt.offset = plt_offset;
4469 }
4470
4471 /* We also need to make an entry in the .rela.plt section. */
4472 if (!doneone)
4473 {
4474 htab->relplt->size += sizeof (Elf32_External_Rela);
4475
4476 if (htab->plt_type == PLT_VXWORKS)
4477 {
4478 /* Allocate space for the unloaded relocations. */
4479 if (!info->shared)
4480 {
4481 if (ent->plt.offset
4482 == (bfd_vma) htab->plt_initial_entry_size)
4483 {
4484 htab->srelplt2->size
4485 += sizeof (Elf32_External_Rela)
4486 * VXWORKS_PLTRESOLVE_RELOCS;
4487 }
4488
4489 htab->srelplt2->size
4490 += sizeof (Elf32_External_Rela)
4491 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4492 }
4493
4494 /* Every PLT entry has an associated GOT entry in
4495 .got.plt. */
4496 htab->sgotplt->size += 4;
4497 }
4498 doneone = TRUE;
4499 }
4500 }
4501 else
4502 ent->plt.offset = (bfd_vma) -1;
4503 }
4504 else
4505 ent->plt.offset = (bfd_vma) -1;
4506
4507 if (!doneone)
4508 {
4509 h->plt.plist = NULL;
4510 h->needs_plt = 0;
4511 }
4512 }
4513 else
4514 {
4515 h->plt.plist = NULL;
4516 h->needs_plt = 0;
4517 }
4518
4519 eh = (struct ppc_elf_link_hash_entry *) h;
4520 if (eh->elf.got.refcount > 0)
4521 {
4522 /* Make sure this symbol is output as a dynamic symbol. */
4523 if (eh->elf.dynindx == -1
4524 && !eh->elf.forced_local)
4525 {
4526 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4527 return FALSE;
4528 }
4529
4530 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4531 && !eh->elf.def_dynamic)
4532 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4533 eh->elf.got.offset = (bfd_vma) -1;
4534 else
4535 {
4536 bfd_boolean dyn;
4537 unsigned int need = 0;
4538 if ((eh->tls_mask & TLS_TLS) != 0)
4539 {
4540 if ((eh->tls_mask & TLS_LD) != 0)
4541 need += 8;
4542 if ((eh->tls_mask & TLS_GD) != 0)
4543 need += 8;
4544 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4545 need += 4;
4546 if ((eh->tls_mask & TLS_DTPREL) != 0)
4547 need += 4;
4548 }
4549 else
4550 need += 4;
4551 eh->elf.got.offset = allocate_got (htab, need);
4552 dyn = htab->elf.dynamic_sections_created;
4553 if ((info->shared
4554 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4555 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4556 || eh->elf.root.type != bfd_link_hash_undefweak))
4557 {
4558 /* All the entries we allocated need relocs.
4559 Except LD only needs one. */
4560 if ((eh->tls_mask & TLS_LD) != 0)
4561 need -= 4;
4562 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4563 }
4564 }
4565 }
4566 else
4567 eh->elf.got.offset = (bfd_vma) -1;
4568
4569 if (eh->dyn_relocs == NULL)
4570 return TRUE;
4571
4572 /* In the shared -Bsymbolic case, discard space allocated for
4573 dynamic pc-relative relocs against symbols which turn out to be
4574 defined in regular objects. For the normal shared case, discard
4575 space for relocs that have become local due to symbol visibility
4576 changes. */
4577
4578 if (info->shared)
4579 {
4580 /* Relocs that use pc_count are those that appear on a call insn,
4581 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4582 generated via assembly. We want calls to protected symbols to
4583 resolve directly to the function rather than going via the plt.
4584 If people want function pointer comparisons to work as expected
4585 then they should avoid writing weird assembly. */
4586 if (SYMBOL_CALLS_LOCAL (info, h))
4587 {
4588 struct ppc_elf_dyn_relocs **pp;
4589
4590 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4591 {
4592 p->count -= p->pc_count;
4593 p->pc_count = 0;
4594 if (p->count == 0)
4595 *pp = p->next;
4596 else
4597 pp = &p->next;
4598 }
4599 }
4600
4601 /* Also discard relocs on undefined weak syms with non-default
4602 visibility. */
4603 if (eh->dyn_relocs != NULL
4604 && h->root.type == bfd_link_hash_undefweak)
4605 {
4606 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4607 eh->dyn_relocs = NULL;
4608
4609 /* Make sure undefined weak symbols are output as a dynamic
4610 symbol in PIEs. */
4611 else if (h->dynindx == -1
4612 && !h->forced_local)
4613 {
4614 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4615 return FALSE;
4616 }
4617 }
4618 }
4619 else if (ELIMINATE_COPY_RELOCS)
4620 {
4621 /* For the non-shared case, discard space for relocs against
4622 symbols which turn out to need copy relocs or are not
4623 dynamic. */
4624
4625 if (!h->non_got_ref
4626 && h->def_dynamic
4627 && !h->def_regular)
4628 {
4629 /* Make sure this symbol is output as a dynamic symbol.
4630 Undefined weak syms won't yet be marked as dynamic. */
4631 if (h->dynindx == -1
4632 && !h->forced_local)
4633 {
4634 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4635 return FALSE;
4636 }
4637
4638 /* If that succeeded, we know we'll be keeping all the
4639 relocs. */
4640 if (h->dynindx != -1)
4641 goto keep;
4642 }
4643
4644 eh->dyn_relocs = NULL;
4645
4646 keep: ;
4647 }
4648
4649 /* Finally, allocate space. */
4650 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4651 {
4652 asection *sreloc = elf_section_data (p->sec)->sreloc;
4653 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4654 }
4655
4656 return TRUE;
4657 }
4658
4659 /* Find any dynamic relocs that apply to read-only sections. */
4660
4661 static bfd_boolean
4662 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4663 {
4664 struct ppc_elf_dyn_relocs *p;
4665
4666 if (h->root.type == bfd_link_hash_indirect)
4667 return TRUE;
4668
4669 if (h->root.type == bfd_link_hash_warning)
4670 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4671
4672 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4673 {
4674 asection *s = p->sec->output_section;
4675
4676 if (s != NULL
4677 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4678 == (SEC_READONLY | SEC_ALLOC)))
4679 {
4680 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4681
4682 /* Not an error, just cut short the traversal. */
4683 return FALSE;
4684 }
4685 }
4686 return TRUE;
4687 }
4688
4689 /* Set the sizes of the dynamic sections. */
4690
4691 static bfd_boolean
4692 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4693 struct bfd_link_info *info)
4694 {
4695 struct ppc_elf_link_hash_table *htab;
4696 asection *s;
4697 bfd_boolean relocs;
4698 bfd *ibfd;
4699
4700 #ifdef DEBUG
4701 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4702 #endif
4703
4704 htab = ppc_elf_hash_table (info);
4705 BFD_ASSERT (htab->elf.dynobj != NULL);
4706
4707 if (elf_hash_table (info)->dynamic_sections_created)
4708 {
4709 /* Set the contents of the .interp section to the interpreter. */
4710 if (info->executable)
4711 {
4712 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4713 BFD_ASSERT (s != NULL);
4714 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4715 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4716 }
4717 }
4718
4719 if (htab->plt_type == PLT_OLD)
4720 htab->got_header_size = 16;
4721 else if (htab->plt_type == PLT_NEW)
4722 htab->got_header_size = 12;
4723
4724 /* Set up .got offsets for local syms, and space for local dynamic
4725 relocs. */
4726 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4727 {
4728 bfd_signed_vma *local_got;
4729 bfd_signed_vma *end_local_got;
4730 char *lgot_masks;
4731 bfd_size_type locsymcount;
4732 Elf_Internal_Shdr *symtab_hdr;
4733
4734 if (!is_ppc_elf_target (ibfd->xvec))
4735 continue;
4736
4737 for (s = ibfd->sections; s != NULL; s = s->next)
4738 {
4739 struct ppc_elf_dyn_relocs *p;
4740
4741 for (p = ((struct ppc_elf_dyn_relocs *)
4742 elf_section_data (s)->local_dynrel);
4743 p != NULL;
4744 p = p->next)
4745 {
4746 if (!bfd_is_abs_section (p->sec)
4747 && bfd_is_abs_section (p->sec->output_section))
4748 {
4749 /* Input section has been discarded, either because
4750 it is a copy of a linkonce section or due to
4751 linker script /DISCARD/, so we'll be discarding
4752 the relocs too. */
4753 }
4754 else if (p->count != 0)
4755 {
4756 elf_section_data (p->sec)->sreloc->size
4757 += p->count * sizeof (Elf32_External_Rela);
4758 if ((p->sec->output_section->flags
4759 & (SEC_READONLY | SEC_ALLOC))
4760 == (SEC_READONLY | SEC_ALLOC))
4761 info->flags |= DF_TEXTREL;
4762 }
4763 }
4764 }
4765
4766 local_got = elf_local_got_refcounts (ibfd);
4767 if (!local_got)
4768 continue;
4769
4770 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4771 locsymcount = symtab_hdr->sh_info;
4772 end_local_got = local_got + locsymcount;
4773 lgot_masks = (char *) end_local_got;
4774 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4775 if (*local_got > 0)
4776 {
4777 if (*lgot_masks == (TLS_TLS | TLS_LD))
4778 {
4779 /* If just an LD reloc, we'll just use
4780 htab->tlsld_got.offset. */
4781 htab->tlsld_got.refcount += 1;
4782 *local_got = (bfd_vma) -1;
4783 }
4784 else
4785 {
4786 unsigned int need = 0;
4787 if ((*lgot_masks & TLS_TLS) != 0)
4788 {
4789 if ((*lgot_masks & TLS_GD) != 0)
4790 need += 8;
4791 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4792 need += 4;
4793 if ((*lgot_masks & TLS_DTPREL) != 0)
4794 need += 4;
4795 }
4796 else
4797 need += 4;
4798 *local_got = allocate_got (htab, need);
4799 if (info->shared)
4800 htab->relgot->size += (need
4801 * (sizeof (Elf32_External_Rela) / 4));
4802 }
4803 }
4804 else
4805 *local_got = (bfd_vma) -1;
4806 }
4807
4808 if (htab->tlsld_got.refcount > 0)
4809 {
4810 htab->tlsld_got.offset = allocate_got (htab, 8);
4811 if (info->shared)
4812 htab->relgot->size += sizeof (Elf32_External_Rela);
4813 }
4814 else
4815 htab->tlsld_got.offset = (bfd_vma) -1;
4816
4817 /* Allocate space for global sym dynamic relocs. */
4818 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4819
4820 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4821 {
4822 unsigned int g_o_t = 32768;
4823
4824 /* If we haven't allocated the header, do so now. When we get here,
4825 for old plt/got the got size will be 0 to 32764 (not allocated),
4826 or 32780 to 65536 (header allocated). For new plt/got, the
4827 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4828 if (htab->got->size <= 32768)
4829 {
4830 g_o_t = htab->got->size;
4831 if (htab->plt_type == PLT_OLD)
4832 g_o_t += 4;
4833 htab->got->size += htab->got_header_size;
4834 }
4835
4836 htab->elf.hgot->root.u.def.value = g_o_t;
4837 }
4838
4839 if (htab->glink != NULL && htab->glink->size != 0)
4840 {
4841 htab->glink_pltresolve = htab->glink->size;
4842 /* Space for the branch table. */
4843 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4844 /* Pad out to align the start of PLTresolve. */
4845 htab->glink->size += -htab->glink->size & 15;
4846 htab->glink->size += GLINK_PLTRESOLVE;
4847
4848 if (htab->emit_stub_syms)
4849 {
4850 struct elf_link_hash_entry *sh;
4851 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4852 TRUE, FALSE, FALSE);
4853 if (sh == NULL)
4854 return FALSE;
4855 if (sh->root.type == bfd_link_hash_new)
4856 {
4857 sh->root.type = bfd_link_hash_defined;
4858 sh->root.u.def.section = htab->glink;
4859 sh->root.u.def.value = htab->glink_pltresolve;
4860 sh->ref_regular = 1;
4861 sh->def_regular = 1;
4862 sh->ref_regular_nonweak = 1;
4863 sh->forced_local = 1;
4864 sh->non_elf = 0;
4865 }
4866 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4867 TRUE, FALSE, FALSE);
4868 if (sh == NULL)
4869 return FALSE;
4870 if (sh->root.type == bfd_link_hash_new)
4871 {
4872 sh->root.type = bfd_link_hash_defined;
4873 sh->root.u.def.section = htab->glink;
4874 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4875 sh->ref_regular = 1;
4876 sh->def_regular = 1;
4877 sh->ref_regular_nonweak = 1;
4878 sh->forced_local = 1;
4879 sh->non_elf = 0;
4880 }
4881 }
4882 }
4883
4884 /* We've now determined the sizes of the various dynamic sections.
4885 Allocate memory for them. */
4886 relocs = FALSE;
4887 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4888 {
4889 bfd_boolean strip_section = TRUE;
4890
4891 if ((s->flags & SEC_LINKER_CREATED) == 0)
4892 continue;
4893
4894 if (s == htab->plt
4895 || s == htab->glink
4896 || s == htab->got
4897 || s == htab->sgotplt
4898 || s == htab->sbss
4899 || s == htab->dynbss
4900 || s == htab->dynsbss)
4901 {
4902 /* We'd like to strip these sections if they aren't needed, but if
4903 we've exported dynamic symbols from them we must leave them.
4904 It's too late to tell BFD to get rid of the symbols. */
4905 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4906 strip_section = FALSE;
4907 /* Strip this section if we don't need it; see the
4908 comment below. */
4909 }
4910 else if (s == htab->sdata[0].section
4911 || s == htab->sdata[1].section)
4912 {
4913 /* Strip these too. */
4914 }
4915 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
4916 {
4917 if (s->size != 0)
4918 {
4919 /* Remember whether there are any relocation sections. */
4920 relocs = TRUE;
4921
4922 /* We use the reloc_count field as a counter if we need
4923 to copy relocs into the output file. */
4924 s->reloc_count = 0;
4925 }
4926 }
4927 else
4928 {
4929 /* It's not one of our sections, so don't allocate space. */
4930 continue;
4931 }
4932
4933 if (s->size == 0 && strip_section)
4934 {
4935 /* If we don't need this section, strip it from the
4936 output file. This is mostly to handle .rela.bss and
4937 .rela.plt. We must create both sections in
4938 create_dynamic_sections, because they must be created
4939 before the linker maps input sections to output
4940 sections. The linker does that before
4941 adjust_dynamic_symbol is called, and it is that
4942 function which decides whether anything needs to go
4943 into these sections. */
4944 s->flags |= SEC_EXCLUDE;
4945 continue;
4946 }
4947
4948 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4949 continue;
4950
4951 /* Allocate memory for the section contents. */
4952 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4953 if (s->contents == NULL)
4954 return FALSE;
4955 }
4956
4957 if (htab->elf.dynamic_sections_created)
4958 {
4959 /* Add some entries to the .dynamic section. We fill in the
4960 values later, in ppc_elf_finish_dynamic_sections, but we
4961 must add the entries now so that we get the correct size for
4962 the .dynamic section. The DT_DEBUG entry is filled in by the
4963 dynamic linker and used by the debugger. */
4964 #define add_dynamic_entry(TAG, VAL) \
4965 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4966
4967 if (info->executable)
4968 {
4969 if (!add_dynamic_entry (DT_DEBUG, 0))
4970 return FALSE;
4971 }
4972
4973 if (htab->plt != NULL && htab->plt->size != 0)
4974 {
4975 if (!add_dynamic_entry (DT_PLTGOT, 0)
4976 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4977 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4978 || !add_dynamic_entry (DT_JMPREL, 0))
4979 return FALSE;
4980 }
4981
4982 if (htab->glink != NULL && htab->glink->size != 0)
4983 {
4984 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4985 return FALSE;
4986 }
4987
4988 if (relocs)
4989 {
4990 if (!add_dynamic_entry (DT_RELA, 0)
4991 || !add_dynamic_entry (DT_RELASZ, 0)
4992 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4993 return FALSE;
4994 }
4995
4996 /* If any dynamic relocs apply to a read-only section, then we
4997 need a DT_TEXTREL entry. */
4998 if ((info->flags & DF_TEXTREL) == 0)
4999 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
5000 info);
5001
5002 if ((info->flags & DF_TEXTREL) != 0)
5003 {
5004 if (!add_dynamic_entry (DT_TEXTREL, 0))
5005 return FALSE;
5006 }
5007 }
5008 #undef add_dynamic_entry
5009
5010 return TRUE;
5011 }
5012 \f
5013 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5014
5015 static const int shared_stub_entry[] =
5016 {
5017 0x7c0802a6, /* mflr 0 */
5018 0x429f0005, /* bcl 20, 31, .Lxxx */
5019 0x7d6802a6, /* mflr 11 */
5020 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5021 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5022 0x7c0803a6, /* mtlr 0 */
5023 0x7d6903a6, /* mtctr 11 */
5024 0x4e800420, /* bctr */
5025 };
5026
5027 static const int stub_entry[] =
5028 {
5029 0x3d600000, /* lis 11,xxx@ha */
5030 0x396b0000, /* addi 11,11,xxx@l */
5031 0x7d6903a6, /* mtctr 11 */
5032 0x4e800420, /* bctr */
5033 };
5034
5035 static bfd_boolean
5036 ppc_elf_relax_section (bfd *abfd,
5037 asection *isec,
5038 struct bfd_link_info *link_info,
5039 bfd_boolean *again)
5040 {
5041 struct one_fixup
5042 {
5043 struct one_fixup *next;
5044 asection *tsec;
5045 bfd_vma toff;
5046 bfd_vma trampoff;
5047 };
5048
5049 Elf_Internal_Shdr *symtab_hdr;
5050 bfd_byte *contents = NULL;
5051 Elf_Internal_Sym *isymbuf = NULL;
5052 Elf_Internal_Rela *internal_relocs = NULL;
5053 Elf_Internal_Rela *irel, *irelend;
5054 struct one_fixup *fixups = NULL;
5055 bfd_boolean changed;
5056 struct ppc_elf_link_hash_table *htab;
5057 bfd_size_type trampoff;
5058 asection *got2;
5059
5060 *again = FALSE;
5061
5062 /* Nothing to do if there are no relocations, and no need to do
5063 anything with non-alloc sections. */
5064 if ((isec->flags & SEC_ALLOC) == 0
5065 || (isec->flags & SEC_RELOC) == 0
5066 || isec->reloc_count == 0)
5067 return TRUE;
5068
5069 trampoff = (isec->size + 3) & (bfd_vma) -4;
5070 /* Space for a branch around any trampolines. */
5071 trampoff += 4;
5072
5073 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5074
5075 /* Get a copy of the native relocations. */
5076 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5077 link_info->keep_memory);
5078 if (internal_relocs == NULL)
5079 goto error_return;
5080
5081 htab = ppc_elf_hash_table (link_info);
5082 got2 = bfd_get_section_by_name (abfd, ".got2");
5083
5084 irelend = internal_relocs + isec->reloc_count;
5085 for (irel = internal_relocs; irel < irelend; irel++)
5086 {
5087 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5088 bfd_vma symaddr, reladdr, toff, roff;
5089 asection *tsec;
5090 struct one_fixup *f;
5091 size_t insn_offset = 0;
5092 bfd_vma max_branch_offset, val;
5093 bfd_byte *hit_addr;
5094 unsigned long t0;
5095 unsigned char sym_type;
5096
5097 switch (r_type)
5098 {
5099 case R_PPC_REL24:
5100 case R_PPC_LOCAL24PC:
5101 case R_PPC_PLTREL24:
5102 max_branch_offset = 1 << 25;
5103 break;
5104
5105 case R_PPC_REL14:
5106 case R_PPC_REL14_BRTAKEN:
5107 case R_PPC_REL14_BRNTAKEN:
5108 max_branch_offset = 1 << 15;
5109 break;
5110
5111 default:
5112 continue;
5113 }
5114
5115 /* Get the value of the symbol referred to by the reloc. */
5116 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5117 {
5118 /* A local symbol. */
5119 Elf_Internal_Sym *isym;
5120
5121 /* Read this BFD's local symbols. */
5122 if (isymbuf == NULL)
5123 {
5124 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5125 if (isymbuf == NULL)
5126 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5127 symtab_hdr->sh_info, 0,
5128 NULL, NULL, NULL);
5129 if (isymbuf == 0)
5130 goto error_return;
5131 }
5132 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5133 if (isym->st_shndx == SHN_UNDEF)
5134 continue; /* We can't do anything with undefined symbols. */
5135 else if (isym->st_shndx == SHN_ABS)
5136 tsec = bfd_abs_section_ptr;
5137 else if (isym->st_shndx == SHN_COMMON)
5138 tsec = bfd_com_section_ptr;
5139 else
5140 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5141
5142 toff = isym->st_value;
5143 sym_type = ELF_ST_TYPE (isym->st_info);
5144 }
5145 else
5146 {
5147 /* Global symbol handling. */
5148 unsigned long indx;
5149 struct elf_link_hash_entry *h;
5150
5151 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5152 h = elf_sym_hashes (abfd)[indx];
5153
5154 while (h->root.type == bfd_link_hash_indirect
5155 || h->root.type == bfd_link_hash_warning)
5156 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5157
5158 tsec = NULL;
5159 toff = 0;
5160 if (r_type == R_PPC_PLTREL24
5161 && htab->plt != NULL)
5162 {
5163 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5164
5165 if (ent != NULL)
5166 {
5167 if (htab->plt_type == PLT_NEW)
5168 {
5169 tsec = htab->glink;
5170 toff = ent->glink_offset;
5171 }
5172 else
5173 {
5174 tsec = htab->plt;
5175 toff = ent->plt.offset;
5176 }
5177 }
5178 }
5179 if (tsec != NULL)
5180 ;
5181 else if (h->root.type == bfd_link_hash_defined
5182 || h->root.type == bfd_link_hash_defweak)
5183 {
5184 tsec = h->root.u.def.section;
5185 toff = h->root.u.def.value;
5186 }
5187 else
5188 continue;
5189
5190 sym_type = h->type;
5191 }
5192
5193 /* If the branch and target are in the same section, you have
5194 no hope of adding stubs. We'll error out later should the
5195 branch overflow. */
5196 if (tsec == isec)
5197 continue;
5198
5199 /* There probably isn't any reason to handle symbols in
5200 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5201 attribute for a code section, and we are only looking at
5202 branches. However, implement it correctly here as a
5203 reference for other target relax_section functions. */
5204 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5205 {
5206 /* At this stage in linking, no SEC_MERGE symbol has been
5207 adjusted, so all references to such symbols need to be
5208 passed through _bfd_merged_section_offset. (Later, in
5209 relocate_section, all SEC_MERGE symbols *except* for
5210 section symbols have been adjusted.)
5211
5212 gas may reduce relocations against symbols in SEC_MERGE
5213 sections to a relocation against the section symbol when
5214 the original addend was zero. When the reloc is against
5215 a section symbol we should include the addend in the
5216 offset passed to _bfd_merged_section_offset, since the
5217 location of interest is the original symbol. On the
5218 other hand, an access to "sym+addend" where "sym" is not
5219 a section symbol should not include the addend; Such an
5220 access is presumed to be an offset from "sym"; The
5221 location of interest is just "sym". */
5222 if (sym_type == STT_SECTION)
5223 toff += irel->r_addend;
5224
5225 toff = _bfd_merged_section_offset (abfd, &tsec,
5226 elf_section_data (tsec)->sec_info,
5227 toff);
5228
5229 if (sym_type != STT_SECTION)
5230 toff += irel->r_addend;
5231 }
5232 /* PLTREL24 addends are special. */
5233 else if (r_type != R_PPC_PLTREL24)
5234 toff += irel->r_addend;
5235
5236 /* Attempted -shared link of non-pic code loses. */
5237 if (tsec->output_section == NULL)
5238 continue;
5239
5240 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5241
5242 roff = irel->r_offset;
5243 reladdr = isec->output_section->vma + isec->output_offset + roff;
5244
5245 /* If the branch is in range, no need to do anything. */
5246 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5247 continue;
5248
5249 /* Look for an existing fixup to this address. */
5250 for (f = fixups; f ; f = f->next)
5251 if (f->tsec == tsec && f->toff == toff)
5252 break;
5253
5254 if (f == NULL)
5255 {
5256 size_t size;
5257 unsigned long stub_rtype;
5258
5259 val = trampoff - roff;
5260 if (val >= max_branch_offset)
5261 /* Oh dear, we can't reach a trampoline. Don't try to add
5262 one. We'll report an error later. */
5263 continue;
5264
5265 if (link_info->shared)
5266 {
5267 size = 4 * ARRAY_SIZE (shared_stub_entry);
5268 insn_offset = 12;
5269 stub_rtype = R_PPC_RELAX32PC;
5270 }
5271 else
5272 {
5273 size = 4 * ARRAY_SIZE (stub_entry);
5274 insn_offset = 0;
5275 stub_rtype = R_PPC_RELAX32;
5276 }
5277
5278 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5279 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5280 abort ();
5281 if (tsec == htab->plt
5282 || tsec == htab->glink)
5283 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5284
5285 /* Hijack the old relocation. Since we need two
5286 relocations for this use a "composite" reloc. */
5287 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5288 stub_rtype);
5289 irel->r_offset = trampoff + insn_offset;
5290
5291 /* Record the fixup so we don't do it again this section. */
5292 f = bfd_malloc (sizeof (*f));
5293 f->next = fixups;
5294 f->tsec = tsec;
5295 f->toff = toff;
5296 f->trampoff = trampoff;
5297 fixups = f;
5298
5299 trampoff += size;
5300 }
5301 else
5302 {
5303 val = f->trampoff - roff;
5304 if (val >= max_branch_offset)
5305 continue;
5306
5307 /* Nop out the reloc, since we're finalizing things here. */
5308 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5309 }
5310
5311 /* Get the section contents. */
5312 if (contents == NULL)
5313 {
5314 /* Get cached copy if it exists. */
5315 if (elf_section_data (isec)->this_hdr.contents != NULL)
5316 contents = elf_section_data (isec)->this_hdr.contents;
5317 else
5318 {
5319 /* Go get them off disk. */
5320 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5321 goto error_return;
5322 }
5323 }
5324
5325 /* Fix up the existing branch to hit the trampoline. */
5326 hit_addr = contents + roff;
5327 switch (r_type)
5328 {
5329 case R_PPC_REL24:
5330 case R_PPC_LOCAL24PC:
5331 case R_PPC_PLTREL24:
5332 t0 = bfd_get_32 (abfd, hit_addr);
5333 t0 &= ~0x3fffffc;
5334 t0 |= val & 0x3fffffc;
5335 bfd_put_32 (abfd, t0, hit_addr);
5336 break;
5337
5338 case R_PPC_REL14:
5339 case R_PPC_REL14_BRTAKEN:
5340 case R_PPC_REL14_BRNTAKEN:
5341 t0 = bfd_get_32 (abfd, hit_addr);
5342 t0 &= ~0xfffc;
5343 t0 |= val & 0xfffc;
5344 bfd_put_32 (abfd, t0, hit_addr);
5345 break;
5346 }
5347 }
5348
5349 /* Write out the trampolines. */
5350 changed = fixups != NULL;
5351 if (fixups != NULL)
5352 {
5353 const int *stub;
5354 bfd_byte *dest;
5355 bfd_vma val;
5356 int i, size;
5357
5358 do
5359 {
5360 struct one_fixup *f = fixups;
5361 fixups = fixups->next;
5362 free (f);
5363 }
5364 while (fixups);
5365
5366 contents = bfd_realloc (contents, trampoff);
5367 if (contents == NULL)
5368 goto error_return;
5369
5370 isec->size = (isec->size + 3) & (bfd_vma) -4;
5371 /* Branch around the trampolines. */
5372 val = trampoff - isec->size + 0x48000000;
5373 dest = contents + isec->size;
5374 isec->size = trampoff;
5375 bfd_put_32 (abfd, val, dest);
5376 dest += 4;
5377
5378 if (link_info->shared)
5379 {
5380 stub = shared_stub_entry;
5381 size = ARRAY_SIZE (shared_stub_entry);
5382 }
5383 else
5384 {
5385 stub = stub_entry;
5386 size = ARRAY_SIZE (stub_entry);
5387 }
5388
5389 i = 0;
5390 while (dest < contents + trampoff)
5391 {
5392 bfd_put_32 (abfd, stub[i], dest);
5393 i++;
5394 if (i == size)
5395 i = 0;
5396 dest += 4;
5397 }
5398 BFD_ASSERT (i == 0);
5399 }
5400
5401 if (isymbuf != NULL
5402 && symtab_hdr->contents != (unsigned char *) isymbuf)
5403 {
5404 if (! link_info->keep_memory)
5405 free (isymbuf);
5406 else
5407 {
5408 /* Cache the symbols for elf_link_input_bfd. */
5409 symtab_hdr->contents = (unsigned char *) isymbuf;
5410 }
5411 }
5412
5413 if (contents != NULL
5414 && elf_section_data (isec)->this_hdr.contents != contents)
5415 {
5416 if (!changed && !link_info->keep_memory)
5417 free (contents);
5418 else
5419 {
5420 /* Cache the section contents for elf_link_input_bfd. */
5421 elf_section_data (isec)->this_hdr.contents = contents;
5422 }
5423 }
5424
5425 if (elf_section_data (isec)->relocs != internal_relocs)
5426 {
5427 if (!changed)
5428 free (internal_relocs);
5429 else
5430 elf_section_data (isec)->relocs = internal_relocs;
5431 }
5432
5433 *again = changed;
5434 return TRUE;
5435
5436 error_return:
5437 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5438 free (isymbuf);
5439 if (contents != NULL
5440 && elf_section_data (isec)->this_hdr.contents != contents)
5441 free (contents);
5442 if (internal_relocs != NULL
5443 && elf_section_data (isec)->relocs != internal_relocs)
5444 free (internal_relocs);
5445 return FALSE;
5446 }
5447 \f
5448 /* What to do when ld finds relocations against symbols defined in
5449 discarded sections. */
5450
5451 static unsigned int
5452 ppc_elf_action_discarded (asection *sec)
5453 {
5454 if (strcmp (".fixup", sec->name) == 0)
5455 return 0;
5456
5457 if (strcmp (".got2", sec->name) == 0)
5458 return 0;
5459
5460 return _bfd_elf_default_action_discarded (sec);
5461 }
5462 \f
5463 /* Fill in the address for a pointer generated in a linker section. */
5464
5465 static bfd_vma
5466 elf_finish_pointer_linker_section (bfd *input_bfd,
5467 elf_linker_section_t *lsect,
5468 struct elf_link_hash_entry *h,
5469 bfd_vma relocation,
5470 const Elf_Internal_Rela *rel)
5471 {
5472 elf_linker_section_pointers_t *linker_section_ptr;
5473
5474 BFD_ASSERT (lsect != NULL);
5475
5476 if (h != NULL)
5477 {
5478 /* Handle global symbol. */
5479 struct ppc_elf_link_hash_entry *eh;
5480
5481 eh = (struct ppc_elf_link_hash_entry *) h;
5482 BFD_ASSERT (eh->elf.def_regular);
5483 linker_section_ptr = eh->linker_section_pointer;
5484 }
5485 else
5486 {
5487 /* Handle local symbol. */
5488 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5489
5490 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5491 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5492 }
5493
5494 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5495 rel->r_addend,
5496 lsect);
5497 BFD_ASSERT (linker_section_ptr != NULL);
5498
5499 /* Offset will always be a multiple of four, so use the bottom bit
5500 as a "written" flag. */
5501 if ((linker_section_ptr->offset & 1) == 0)
5502 {
5503 bfd_put_32 (lsect->section->owner,
5504 relocation + linker_section_ptr->addend,
5505 lsect->section->contents + linker_section_ptr->offset);
5506 linker_section_ptr->offset += 1;
5507 }
5508
5509 relocation = (lsect->section->output_offset
5510 + linker_section_ptr->offset - 1
5511 - 0x8000);
5512
5513 #ifdef DEBUG
5514 fprintf (stderr,
5515 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5516 lsect->name, (long) relocation, (long) relocation);
5517 #endif
5518
5519 /* Subtract out the addend, because it will get added back in by the normal
5520 processing. */
5521 return relocation - linker_section_ptr->addend;
5522 }
5523
5524 /* The RELOCATE_SECTION function is called by the ELF backend linker
5525 to handle the relocations for a section.
5526
5527 The relocs are always passed as Rela structures; if the section
5528 actually uses Rel structures, the r_addend field will always be
5529 zero.
5530
5531 This function is responsible for adjust the section contents as
5532 necessary, and (if using Rela relocs and generating a
5533 relocatable output file) adjusting the reloc addend as
5534 necessary.
5535
5536 This function does not have to worry about setting the reloc
5537 address or the reloc symbol index.
5538
5539 LOCAL_SYMS is a pointer to the swapped in local symbols.
5540
5541 LOCAL_SECTIONS is an array giving the section in the input file
5542 corresponding to the st_shndx field of each local symbol.
5543
5544 The global hash table entry for the global symbols can be found
5545 via elf_sym_hashes (input_bfd).
5546
5547 When generating relocatable output, this function must handle
5548 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5549 going to be the section symbol corresponding to the output
5550 section, which means that the addend must be adjusted
5551 accordingly. */
5552
5553 static bfd_boolean
5554 ppc_elf_relocate_section (bfd *output_bfd,
5555 struct bfd_link_info *info,
5556 bfd *input_bfd,
5557 asection *input_section,
5558 bfd_byte *contents,
5559 Elf_Internal_Rela *relocs,
5560 Elf_Internal_Sym *local_syms,
5561 asection **local_sections)
5562 {
5563 Elf_Internal_Shdr *symtab_hdr;
5564 struct elf_link_hash_entry **sym_hashes;
5565 struct ppc_elf_link_hash_table *htab;
5566 Elf_Internal_Rela *rel;
5567 Elf_Internal_Rela *relend;
5568 Elf_Internal_Rela outrel;
5569 bfd_byte *loc;
5570 asection *got2, *sreloc = NULL;
5571 bfd_vma *local_got_offsets;
5572 bfd_boolean ret = TRUE;
5573 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5574
5575 #ifdef DEBUG
5576 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5577 "%ld relocations%s",
5578 input_bfd, input_section,
5579 (long) input_section->reloc_count,
5580 (info->relocatable) ? " (relocatable)" : "");
5581 #endif
5582
5583 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5584
5585 /* Initialize howto table if not already done. */
5586 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5587 ppc_elf_howto_init ();
5588
5589 htab = ppc_elf_hash_table (info);
5590 local_got_offsets = elf_local_got_offsets (input_bfd);
5591 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5592 sym_hashes = elf_sym_hashes (input_bfd);
5593 rel = relocs;
5594 relend = relocs + input_section->reloc_count;
5595 for (; rel < relend; rel++)
5596 {
5597 enum elf_ppc_reloc_type r_type;
5598 bfd_vma addend;
5599 bfd_reloc_status_type r;
5600 Elf_Internal_Sym *sym;
5601 asection *sec;
5602 struct elf_link_hash_entry *h;
5603 const char *sym_name;
5604 reloc_howto_type *howto;
5605 unsigned long r_symndx;
5606 bfd_vma relocation;
5607 bfd_vma branch_bit, insn, from;
5608 bfd_boolean unresolved_reloc;
5609 bfd_boolean warned;
5610 unsigned int tls_type, tls_mask, tls_gd;
5611
5612 r_type = ELF32_R_TYPE (rel->r_info);
5613 sym = NULL;
5614 sec = NULL;
5615 h = NULL;
5616 unresolved_reloc = FALSE;
5617 warned = FALSE;
5618 r_symndx = ELF32_R_SYM (rel->r_info);
5619
5620 if (r_symndx < symtab_hdr->sh_info)
5621 {
5622 sym = local_syms + r_symndx;
5623 sec = local_sections[r_symndx];
5624 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5625
5626 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5627 }
5628 else
5629 {
5630 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5631 r_symndx, symtab_hdr, sym_hashes,
5632 h, sec, relocation,
5633 unresolved_reloc, warned);
5634
5635 sym_name = h->root.root.string;
5636 }
5637
5638 if (sec != NULL && elf_discarded_section (sec))
5639 {
5640 /* For relocs against symbols from removed linkonce sections,
5641 or sections discarded by a linker script, we just want the
5642 section contents zeroed. Avoid any special processing. */
5643 howto = NULL;
5644 if (r_type < R_PPC_max)
5645 howto = ppc_elf_howto_table[r_type];
5646 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5647 rel->r_info = 0;
5648 rel->r_addend = 0;
5649 continue;
5650 }
5651
5652 if (info->relocatable)
5653 {
5654 if (got2 != NULL
5655 && r_type == R_PPC_PLTREL24
5656 && rel->r_addend >= 32768)
5657 {
5658 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5659 addend specifies the GOT pointer offset within .got2. */
5660 rel->r_addend += got2->output_offset;
5661 }
5662 continue;
5663 }
5664
5665 /* TLS optimizations. Replace instruction sequences and relocs
5666 based on information we collected in tls_optimize. We edit
5667 RELOCS so that --emit-relocs will output something sensible
5668 for the final instruction stream. */
5669 tls_mask = 0;
5670 tls_gd = 0;
5671 if (IS_PPC_TLS_RELOC (r_type))
5672 {
5673 if (h != NULL)
5674 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5675 else if (local_got_offsets != NULL)
5676 {
5677 char *lgot_masks;
5678 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5679 tls_mask = lgot_masks[r_symndx];
5680 }
5681 }
5682
5683 /* Ensure reloc mapping code below stays sane. */
5684 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5685 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5686 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5687 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5688 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5689 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5690 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5691 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5692 abort ();
5693 switch (r_type)
5694 {
5695 default:
5696 break;
5697
5698 case R_PPC_GOT_TPREL16:
5699 case R_PPC_GOT_TPREL16_LO:
5700 if (tls_mask != 0
5701 && (tls_mask & TLS_TPREL) == 0)
5702 {
5703 bfd_vma insn;
5704 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5705 insn &= 31 << 21;
5706 insn |= 0x3c020000; /* addis 0,2,0 */
5707 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5708 r_type = R_PPC_TPREL16_HA;
5709 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5710 }
5711 break;
5712
5713 case R_PPC_TLS:
5714 if (tls_mask != 0
5715 && (tls_mask & TLS_TPREL) == 0)
5716 {
5717 bfd_vma insn, rtra;
5718 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5719 if ((insn & ((31 << 26) | (31 << 11)))
5720 == ((31 << 26) | (2 << 11)))
5721 rtra = insn & ((1 << 26) - (1 << 16));
5722 else if ((insn & ((31 << 26) | (31 << 16)))
5723 == ((31 << 26) | (2 << 16)))
5724 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5725 else
5726 abort ();
5727 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5728 /* add -> addi. */
5729 insn = 14 << 26;
5730 else if ((insn & (31 << 1)) == 23 << 1
5731 && ((insn & (31 << 6)) < 14 << 6
5732 || ((insn & (31 << 6)) >= 16 << 6
5733 && (insn & (31 << 6)) < 24 << 6)))
5734 /* load and store indexed -> dform. */
5735 insn = (32 | ((insn >> 6) & 31)) << 26;
5736 else if ((insn & (31 << 1)) == 21 << 1
5737 && (insn & (0x1a << 6)) == 0)
5738 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5739 insn = (((58 | ((insn >> 6) & 4)) << 26)
5740 | ((insn >> 6) & 1));
5741 else if ((insn & (31 << 1)) == 21 << 1
5742 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5743 /* lwax -> lwa. */
5744 insn = (58 << 26) | 2;
5745 else
5746 abort ();
5747 insn |= rtra;
5748 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5749 r_type = R_PPC_TPREL16_LO;
5750 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5751
5752 /* Was PPC_TLS which sits on insn boundary, now
5753 PPC_TPREL16_LO which is at low-order half-word. */
5754 rel->r_offset += d_offset;
5755 }
5756 break;
5757
5758 case R_PPC_GOT_TLSGD16_HI:
5759 case R_PPC_GOT_TLSGD16_HA:
5760 tls_gd = TLS_TPRELGD;
5761 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5762 goto tls_gdld_hi;
5763 break;
5764
5765 case R_PPC_GOT_TLSLD16_HI:
5766 case R_PPC_GOT_TLSLD16_HA:
5767 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5768 {
5769 tls_gdld_hi:
5770 if ((tls_mask & tls_gd) != 0)
5771 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5772 + R_PPC_GOT_TPREL16);
5773 else
5774 {
5775 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5776 rel->r_offset -= d_offset;
5777 r_type = R_PPC_NONE;
5778 }
5779 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5780 }
5781 break;
5782
5783 case R_PPC_GOT_TLSGD16:
5784 case R_PPC_GOT_TLSGD16_LO:
5785 tls_gd = TLS_TPRELGD;
5786 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5787 goto tls_get_addr_check;
5788 break;
5789
5790 case R_PPC_GOT_TLSLD16:
5791 case R_PPC_GOT_TLSLD16_LO:
5792 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5793 {
5794 tls_get_addr_check:
5795 if (rel + 1 < relend)
5796 {
5797 enum elf_ppc_reloc_type r_type2;
5798 unsigned long r_symndx2;
5799 struct elf_link_hash_entry *h2;
5800 bfd_vma insn1, insn2;
5801 bfd_vma offset;
5802
5803 /* The next instruction should be a call to
5804 __tls_get_addr. Peek at the reloc to be sure. */
5805 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5806 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5807 if (r_symndx2 < symtab_hdr->sh_info
5808 || (r_type2 != R_PPC_REL14
5809 && r_type2 != R_PPC_REL14_BRTAKEN
5810 && r_type2 != R_PPC_REL14_BRNTAKEN
5811 && r_type2 != R_PPC_REL24
5812 && r_type2 != R_PPC_PLTREL24))
5813 break;
5814
5815 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5816 while (h2->root.type == bfd_link_hash_indirect
5817 || h2->root.type == bfd_link_hash_warning)
5818 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5819 if (h2 == NULL || h2 != htab->tls_get_addr)
5820 break;
5821
5822 /* OK, it checks out. Replace the call. */
5823 offset = rel[1].r_offset;
5824 insn1 = bfd_get_32 (output_bfd,
5825 contents + rel->r_offset - d_offset);
5826 if ((tls_mask & tls_gd) != 0)
5827 {
5828 /* IE */
5829 insn1 &= (1 << 26) - 1;
5830 insn1 |= 32 << 26; /* lwz */
5831 insn2 = 0x7c631214; /* add 3,3,2 */
5832 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5833 rel[1].r_addend = 0;
5834 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5835 + R_PPC_GOT_TPREL16);
5836 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5837 }
5838 else
5839 {
5840 /* LE */
5841 insn1 = 0x3c620000; /* addis 3,2,0 */
5842 insn2 = 0x38630000; /* addi 3,3,0 */
5843 if (tls_gd == 0)
5844 {
5845 /* Was an LD reloc. */
5846 r_symndx = 0;
5847 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5848 }
5849 r_type = R_PPC_TPREL16_HA;
5850 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5851 rel[1].r_info = ELF32_R_INFO (r_symndx,
5852 R_PPC_TPREL16_LO);
5853 rel[1].r_offset += d_offset;
5854 rel[1].r_addend = rel->r_addend;
5855 }
5856 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
5857 bfd_put_32 (output_bfd, insn2, contents + offset);
5858 if (tls_gd == 0)
5859 {
5860 /* We changed the symbol on an LD reloc. Start over
5861 in order to get h, sym, sec etc. right. */
5862 rel--;
5863 continue;
5864 }
5865 }
5866 }
5867 break;
5868 }
5869
5870 /* Handle other relocations that tweak non-addend part of insn. */
5871 branch_bit = 0;
5872 switch (r_type)
5873 {
5874 default:
5875 break;
5876
5877 /* Branch taken prediction relocations. */
5878 case R_PPC_ADDR14_BRTAKEN:
5879 case R_PPC_REL14_BRTAKEN:
5880 branch_bit = BRANCH_PREDICT_BIT;
5881 /* Fall thru */
5882
5883 /* Branch not taken prediction relocations. */
5884 case R_PPC_ADDR14_BRNTAKEN:
5885 case R_PPC_REL14_BRNTAKEN:
5886 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5887 insn &= ~BRANCH_PREDICT_BIT;
5888 insn |= branch_bit;
5889
5890 from = (rel->r_offset
5891 + input_section->output_offset
5892 + input_section->output_section->vma);
5893
5894 /* Invert 'y' bit if not the default. */
5895 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5896 insn ^= BRANCH_PREDICT_BIT;
5897
5898 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5899 break;
5900 }
5901
5902 addend = rel->r_addend;
5903 tls_type = 0;
5904 howto = NULL;
5905 if (r_type < R_PPC_max)
5906 howto = ppc_elf_howto_table[r_type];
5907 switch (r_type)
5908 {
5909 default:
5910 (*_bfd_error_handler)
5911 (_("%B: unknown relocation type %d for symbol %s"),
5912 input_bfd, (int) r_type, sym_name);
5913
5914 bfd_set_error (bfd_error_bad_value);
5915 ret = FALSE;
5916 continue;
5917
5918 case R_PPC_NONE:
5919 case R_PPC_TLS:
5920 case R_PPC_EMB_MRKREF:
5921 case R_PPC_GNU_VTINHERIT:
5922 case R_PPC_GNU_VTENTRY:
5923 continue;
5924
5925 /* GOT16 relocations. Like an ADDR16 using the symbol's
5926 address in the GOT as relocation value instead of the
5927 symbol's value itself. Also, create a GOT entry for the
5928 symbol and put the symbol value there. */
5929 case R_PPC_GOT_TLSGD16:
5930 case R_PPC_GOT_TLSGD16_LO:
5931 case R_PPC_GOT_TLSGD16_HI:
5932 case R_PPC_GOT_TLSGD16_HA:
5933 tls_type = TLS_TLS | TLS_GD;
5934 goto dogot;
5935
5936 case R_PPC_GOT_TLSLD16:
5937 case R_PPC_GOT_TLSLD16_LO:
5938 case R_PPC_GOT_TLSLD16_HI:
5939 case R_PPC_GOT_TLSLD16_HA:
5940 tls_type = TLS_TLS | TLS_LD;
5941 goto dogot;
5942
5943 case R_PPC_GOT_TPREL16:
5944 case R_PPC_GOT_TPREL16_LO:
5945 case R_PPC_GOT_TPREL16_HI:
5946 case R_PPC_GOT_TPREL16_HA:
5947 tls_type = TLS_TLS | TLS_TPREL;
5948 goto dogot;
5949
5950 case R_PPC_GOT_DTPREL16:
5951 case R_PPC_GOT_DTPREL16_LO:
5952 case R_PPC_GOT_DTPREL16_HI:
5953 case R_PPC_GOT_DTPREL16_HA:
5954 tls_type = TLS_TLS | TLS_DTPREL;
5955 goto dogot;
5956
5957 case R_PPC_GOT16:
5958 case R_PPC_GOT16_LO:
5959 case R_PPC_GOT16_HI:
5960 case R_PPC_GOT16_HA:
5961 dogot:
5962 {
5963 /* Relocation is to the entry for this symbol in the global
5964 offset table. */
5965 bfd_vma off;
5966 bfd_vma *offp;
5967 unsigned long indx;
5968
5969 if (htab->got == NULL)
5970 abort ();
5971
5972 indx = 0;
5973 if (tls_type == (TLS_TLS | TLS_LD)
5974 && (h == NULL
5975 || !h->def_dynamic))
5976 offp = &htab->tlsld_got.offset;
5977 else if (h != NULL)
5978 {
5979 bfd_boolean dyn;
5980 dyn = htab->elf.dynamic_sections_created;
5981 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5982 || (info->shared
5983 && SYMBOL_REFERENCES_LOCAL (info, h)))
5984 /* This is actually a static link, or it is a
5985 -Bsymbolic link and the symbol is defined
5986 locally, or the symbol was forced to be local
5987 because of a version file. */
5988 ;
5989 else
5990 {
5991 indx = h->dynindx;
5992 unresolved_reloc = FALSE;
5993 }
5994 offp = &h->got.offset;
5995 }
5996 else
5997 {
5998 if (local_got_offsets == NULL)
5999 abort ();
6000 offp = &local_got_offsets[r_symndx];
6001 }
6002
6003 /* The offset must always be a multiple of 4. We use the
6004 least significant bit to record whether we have already
6005 processed this entry. */
6006 off = *offp;
6007 if ((off & 1) != 0)
6008 off &= ~1;
6009 else
6010 {
6011 unsigned int tls_m = (tls_mask
6012 & (TLS_LD | TLS_GD | TLS_DTPREL
6013 | TLS_TPREL | TLS_TPRELGD));
6014
6015 if (offp == &htab->tlsld_got.offset)
6016 tls_m = TLS_LD;
6017 else if (h == NULL
6018 || !h->def_dynamic)
6019 tls_m &= ~TLS_LD;
6020
6021 /* We might have multiple got entries for this sym.
6022 Initialize them all. */
6023 do
6024 {
6025 int tls_ty = 0;
6026
6027 if ((tls_m & TLS_LD) != 0)
6028 {
6029 tls_ty = TLS_TLS | TLS_LD;
6030 tls_m &= ~TLS_LD;
6031 }
6032 else if ((tls_m & TLS_GD) != 0)
6033 {
6034 tls_ty = TLS_TLS | TLS_GD;
6035 tls_m &= ~TLS_GD;
6036 }
6037 else if ((tls_m & TLS_DTPREL) != 0)
6038 {
6039 tls_ty = TLS_TLS | TLS_DTPREL;
6040 tls_m &= ~TLS_DTPREL;
6041 }
6042 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6043 {
6044 tls_ty = TLS_TLS | TLS_TPREL;
6045 tls_m = 0;
6046 }
6047
6048 /* Generate relocs for the dynamic linker. */
6049 if ((info->shared || indx != 0)
6050 && (h == NULL
6051 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6052 || h->root.type != bfd_link_hash_undefweak))
6053 {
6054 outrel.r_offset = (htab->got->output_section->vma
6055 + htab->got->output_offset
6056 + off);
6057 outrel.r_addend = 0;
6058 if (tls_ty & (TLS_LD | TLS_GD))
6059 {
6060 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6061 if (tls_ty == (TLS_TLS | TLS_GD))
6062 {
6063 loc = htab->relgot->contents;
6064 loc += (htab->relgot->reloc_count++
6065 * sizeof (Elf32_External_Rela));
6066 bfd_elf32_swap_reloca_out (output_bfd,
6067 &outrel, loc);
6068 outrel.r_offset += 4;
6069 outrel.r_info
6070 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6071 }
6072 }
6073 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6074 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6075 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6076 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6077 else if (indx == 0)
6078 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6079 else
6080 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6081 if (indx == 0)
6082 {
6083 outrel.r_addend += relocation;
6084 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6085 outrel.r_addend -= htab->elf.tls_sec->vma;
6086 }
6087 loc = htab->relgot->contents;
6088 loc += (htab->relgot->reloc_count++
6089 * sizeof (Elf32_External_Rela));
6090 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6091 }
6092
6093 /* Init the .got section contents if we're not
6094 emitting a reloc. */
6095 else
6096 {
6097 bfd_vma value = relocation;
6098
6099 if (tls_ty == (TLS_TLS | TLS_LD))
6100 value = 1;
6101 else if (tls_ty != 0)
6102 {
6103 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6104 if (tls_ty == (TLS_TLS | TLS_TPREL))
6105 value += DTP_OFFSET - TP_OFFSET;
6106
6107 if (tls_ty == (TLS_TLS | TLS_GD))
6108 {
6109 bfd_put_32 (output_bfd, value,
6110 htab->got->contents + off + 4);
6111 value = 1;
6112 }
6113 }
6114 bfd_put_32 (output_bfd, value,
6115 htab->got->contents + off);
6116 }
6117
6118 off += 4;
6119 if (tls_ty & (TLS_LD | TLS_GD))
6120 off += 4;
6121 }
6122 while (tls_m != 0);
6123
6124 off = *offp;
6125 *offp = off | 1;
6126 }
6127
6128 if (off >= (bfd_vma) -2)
6129 abort ();
6130
6131 if ((tls_type & TLS_TLS) != 0)
6132 {
6133 if (tls_type != (TLS_TLS | TLS_LD))
6134 {
6135 if ((tls_mask & TLS_LD) != 0
6136 && !(h == NULL
6137 || !h->def_dynamic))
6138 off += 8;
6139 if (tls_type != (TLS_TLS | TLS_GD))
6140 {
6141 if ((tls_mask & TLS_GD) != 0)
6142 off += 8;
6143 if (tls_type != (TLS_TLS | TLS_DTPREL))
6144 {
6145 if ((tls_mask & TLS_DTPREL) != 0)
6146 off += 4;
6147 }
6148 }
6149 }
6150 }
6151
6152 relocation = htab->got->output_offset + off;
6153 relocation -= htab->elf.hgot->root.u.def.value;
6154
6155 /* Addends on got relocations don't make much sense.
6156 x+off@got is actually x@got+off, and since the got is
6157 generated by a hash table traversal, the value in the
6158 got at entry m+n bears little relation to the entry m. */
6159 if (addend != 0)
6160 (*_bfd_error_handler)
6161 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6162 input_bfd,
6163 input_section,
6164 (long) rel->r_offset,
6165 howto->name,
6166 sym_name);
6167 }
6168 break;
6169
6170 /* Relocations that need no special processing. */
6171 case R_PPC_LOCAL24PC:
6172 /* It makes no sense to point a local relocation
6173 at a symbol not in this object. */
6174 if (unresolved_reloc)
6175 {
6176 if (! (*info->callbacks->undefined_symbol) (info,
6177 h->root.root.string,
6178 input_bfd,
6179 input_section,
6180 rel->r_offset,
6181 TRUE))
6182 return FALSE;
6183 continue;
6184 }
6185 break;
6186
6187 case R_PPC_DTPREL16:
6188 case R_PPC_DTPREL16_LO:
6189 case R_PPC_DTPREL16_HI:
6190 case R_PPC_DTPREL16_HA:
6191 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6192 break;
6193
6194 /* Relocations that may need to be propagated if this is a shared
6195 object. */
6196 case R_PPC_TPREL16:
6197 case R_PPC_TPREL16_LO:
6198 case R_PPC_TPREL16_HI:
6199 case R_PPC_TPREL16_HA:
6200 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6201 /* The TPREL16 relocs shouldn't really be used in shared
6202 libs as they will result in DT_TEXTREL being set, but
6203 support them anyway. */
6204 goto dodyn;
6205
6206 case R_PPC_TPREL32:
6207 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6208 goto dodyn;
6209
6210 case R_PPC_DTPREL32:
6211 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6212 goto dodyn;
6213
6214 case R_PPC_DTPMOD32:
6215 relocation = 1;
6216 addend = 0;
6217 goto dodyn;
6218
6219 case R_PPC_REL16:
6220 case R_PPC_REL16_LO:
6221 case R_PPC_REL16_HI:
6222 case R_PPC_REL16_HA:
6223 break;
6224
6225 case R_PPC_REL24:
6226 case R_PPC_REL32:
6227 case R_PPC_REL14:
6228 case R_PPC_REL14_BRTAKEN:
6229 case R_PPC_REL14_BRNTAKEN:
6230 /* If these relocations are not to a named symbol, they can be
6231 handled right here, no need to bother the dynamic linker. */
6232 if (SYMBOL_REFERENCES_LOCAL (info, h)
6233 || h == htab->elf.hgot)
6234 break;
6235 /* fall through */
6236
6237 /* Relocations that always need to be propagated if this is a shared
6238 object. */
6239 case R_PPC_ADDR32:
6240 case R_PPC_ADDR24:
6241 case R_PPC_ADDR16:
6242 case R_PPC_ADDR16_LO:
6243 case R_PPC_ADDR16_HI:
6244 case R_PPC_ADDR16_HA:
6245 case R_PPC_ADDR14:
6246 case R_PPC_ADDR14_BRTAKEN:
6247 case R_PPC_ADDR14_BRNTAKEN:
6248 case R_PPC_UADDR32:
6249 case R_PPC_UADDR16:
6250 dodyn:
6251 if ((input_section->flags & SEC_ALLOC) == 0)
6252 break;
6253 /* Fall thru. */
6254
6255 if ((info->shared
6256 && (h == NULL
6257 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6258 || h->root.type != bfd_link_hash_undefweak)
6259 && (MUST_BE_DYN_RELOC (r_type)
6260 || !SYMBOL_CALLS_LOCAL (info, h)))
6261 || (ELIMINATE_COPY_RELOCS
6262 && !info->shared
6263 && h != NULL
6264 && h->dynindx != -1
6265 && !h->non_got_ref
6266 && h->def_dynamic
6267 && !h->def_regular))
6268 {
6269 int skip;
6270
6271 #ifdef DEBUG
6272 fprintf (stderr, "ppc_elf_relocate_section needs to "
6273 "create relocation for %s\n",
6274 (h && h->root.root.string
6275 ? h->root.root.string : "<unknown>"));
6276 #endif
6277
6278 /* When generating a shared object, these relocations
6279 are copied into the output file to be resolved at run
6280 time. */
6281 if (sreloc == NULL)
6282 {
6283 const char *name;
6284
6285 name = (bfd_elf_string_from_elf_section
6286 (input_bfd,
6287 elf_elfheader (input_bfd)->e_shstrndx,
6288 elf_section_data (input_section)->rel_hdr.sh_name));
6289 if (name == NULL)
6290 return FALSE;
6291
6292 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6293 && strcmp (bfd_get_section_name (input_bfd,
6294 input_section),
6295 name + 5) == 0);
6296
6297 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6298 BFD_ASSERT (sreloc != NULL);
6299 }
6300
6301 skip = 0;
6302
6303 outrel.r_offset =
6304 _bfd_elf_section_offset (output_bfd, info, input_section,
6305 rel->r_offset);
6306 if (outrel.r_offset == (bfd_vma) -1
6307 || outrel.r_offset == (bfd_vma) -2)
6308 skip = (int) outrel.r_offset;
6309 outrel.r_offset += (input_section->output_section->vma
6310 + input_section->output_offset);
6311
6312 if (skip)
6313 memset (&outrel, 0, sizeof outrel);
6314 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6315 {
6316 unresolved_reloc = FALSE;
6317 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6318 outrel.r_addend = rel->r_addend;
6319 }
6320 else
6321 {
6322 outrel.r_addend = relocation + rel->r_addend;
6323
6324 if (r_type == R_PPC_ADDR32)
6325 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6326 else
6327 {
6328 long indx;
6329
6330 if (bfd_is_abs_section (sec))
6331 indx = 0;
6332 else if (sec == NULL || sec->owner == NULL)
6333 {
6334 bfd_set_error (bfd_error_bad_value);
6335 return FALSE;
6336 }
6337 else
6338 {
6339 asection *osec;
6340
6341 /* We are turning this relocation into one
6342 against a section symbol. It would be
6343 proper to subtract the symbol's value,
6344 osec->vma, from the emitted reloc addend,
6345 but ld.so expects buggy relocs. */
6346 osec = sec->output_section;
6347 indx = elf_section_data (osec)->dynindx;
6348 if (indx == 0)
6349 {
6350 osec = htab->elf.text_index_section;
6351 indx = elf_section_data (osec)->dynindx;
6352 }
6353 BFD_ASSERT (indx != 0);
6354 #ifdef DEBUG
6355 if (indx == 0)
6356 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6357 indx, osec->name, osec->flags,
6358 h->root.root.string);
6359 #endif
6360 }
6361
6362 outrel.r_info = ELF32_R_INFO (indx, r_type);
6363 }
6364 }
6365
6366 loc = sreloc->contents;
6367 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6368 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6369
6370 if (skip == -1)
6371 continue;
6372
6373 /* This reloc will be computed at runtime. We clear the memory
6374 so that it contains predictable value. */
6375 if (! skip
6376 && ((input_section->flags & SEC_ALLOC) != 0
6377 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6378 {
6379 relocation = howto->pc_relative ? outrel.r_offset : 0;
6380 addend = 0;
6381 break;
6382 }
6383 }
6384 break;
6385
6386 case R_PPC_RELAX32PC_PLT:
6387 case R_PPC_RELAX32_PLT:
6388 {
6389 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6390
6391 if (htab->plt_type == PLT_NEW)
6392 relocation = (htab->glink->output_section->vma
6393 + htab->glink->output_offset
6394 + ent->glink_offset);
6395 else
6396 relocation = (htab->plt->output_section->vma
6397 + htab->plt->output_offset
6398 + ent->plt.offset);
6399 addend = 0;
6400 }
6401 if (r_type == R_PPC_RELAX32_PLT)
6402 goto relax32;
6403 /* Fall thru */
6404
6405 case R_PPC_RELAX32PC:
6406 relocation -= (input_section->output_section->vma
6407 + input_section->output_offset
6408 + rel->r_offset - 4);
6409 /* Fall thru */
6410
6411 case R_PPC_RELAX32:
6412 relax32:
6413 {
6414 unsigned long t0;
6415 unsigned long t1;
6416
6417 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6418 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6419
6420 /* We're clearing the bits for R_PPC_ADDR16_HA
6421 and R_PPC_ADDR16_LO here. */
6422 t0 &= ~0xffff;
6423 t1 &= ~0xffff;
6424
6425 /* t0 is HA, t1 is LO */
6426 relocation += addend;
6427 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6428 t1 |= relocation & 0xffff;
6429
6430 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6431 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6432 }
6433 continue;
6434
6435 /* Indirect .sdata relocation. */
6436 case R_PPC_EMB_SDAI16:
6437 BFD_ASSERT (htab->sdata[0].section != NULL);
6438 relocation
6439 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6440 h, relocation, rel);
6441 break;
6442
6443 /* Indirect .sdata2 relocation. */
6444 case R_PPC_EMB_SDA2I16:
6445 BFD_ASSERT (htab->sdata[1].section != NULL);
6446 relocation
6447 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6448 h, relocation, rel);
6449 break;
6450
6451 /* Handle the TOC16 reloc. We want to use the offset within the .got
6452 section, not the actual VMA. This is appropriate when generating
6453 an embedded ELF object, for which the .got section acts like the
6454 AIX .toc section. */
6455 case R_PPC_TOC16: /* phony GOT16 relocations */
6456 BFD_ASSERT (sec != NULL);
6457 BFD_ASSERT (bfd_is_und_section (sec)
6458 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6459 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6460
6461 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6462 break;
6463
6464 case R_PPC_PLTREL24:
6465 /* Relocation is to the entry for this symbol in the
6466 procedure linkage table. */
6467 {
6468 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6469
6470 addend = 0;
6471 if (ent == NULL
6472 || htab->plt == NULL)
6473 {
6474 /* We didn't make a PLT entry for this symbol. This
6475 happens when statically linking PIC code, or when
6476 using -Bsymbolic. */
6477 break;
6478 }
6479
6480 unresolved_reloc = FALSE;
6481 if (htab->plt_type == PLT_NEW)
6482 relocation = (htab->glink->output_section->vma
6483 + htab->glink->output_offset
6484 + ent->glink_offset);
6485 else
6486 relocation = (htab->plt->output_section->vma
6487 + htab->plt->output_offset
6488 + ent->plt.offset);
6489 }
6490 break;
6491
6492 /* Relocate against _SDA_BASE_. */
6493 case R_PPC_SDAREL16:
6494 {
6495 const char *name;
6496 struct elf_link_hash_entry *sh;
6497
6498 BFD_ASSERT (sec != NULL);
6499 name = bfd_get_section_name (abfd, sec->output_section);
6500 if (! ((CONST_STRNEQ (name, ".sdata")
6501 && (name[6] == 0 || name[6] == '.'))
6502 || (CONST_STRNEQ (name, ".sbss")
6503 && (name[5] == 0 || name[5] == '.'))))
6504 {
6505 (*_bfd_error_handler)
6506 (_("%B: the target (%s) of a %s relocation is "
6507 "in the wrong output section (%s)"),
6508 input_bfd,
6509 sym_name,
6510 howto->name,
6511 name);
6512 }
6513 sh = htab->sdata[0].sym;
6514 addend -= (sh->root.u.def.value
6515 + sh->root.u.def.section->output_offset
6516 + sh->root.u.def.section->output_section->vma);
6517 }
6518 break;
6519
6520 /* Relocate against _SDA2_BASE_. */
6521 case R_PPC_EMB_SDA2REL:
6522 {
6523 const char *name;
6524 struct elf_link_hash_entry *sh;
6525
6526 BFD_ASSERT (sec != NULL);
6527 name = bfd_get_section_name (abfd, sec->output_section);
6528 if (! (CONST_STRNEQ (name, ".sdata2")
6529 || CONST_STRNEQ (name, ".sbss2")))
6530 {
6531 (*_bfd_error_handler)
6532 (_("%B: the target (%s) of a %s relocation is "
6533 "in the wrong output section (%s)"),
6534 input_bfd,
6535 sym_name,
6536 howto->name,
6537 name);
6538
6539 bfd_set_error (bfd_error_bad_value);
6540 ret = FALSE;
6541 continue;
6542 }
6543 sh = htab->sdata[1].sym;
6544 addend -= (sh->root.u.def.value
6545 + sh->root.u.def.section->output_offset
6546 + sh->root.u.def.section->output_section->vma);
6547 }
6548 break;
6549
6550 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6551 case R_PPC_EMB_SDA21:
6552 case R_PPC_EMB_RELSDA:
6553 {
6554 const char *name;
6555 int reg;
6556 struct elf_link_hash_entry *sh;
6557
6558 BFD_ASSERT (sec != NULL);
6559 name = bfd_get_section_name (abfd, sec->output_section);
6560 if (((CONST_STRNEQ (name, ".sdata")
6561 && (name[6] == 0 || name[6] == '.'))
6562 || (CONST_STRNEQ (name, ".sbss")
6563 && (name[5] == 0 || name[5] == '.'))))
6564 {
6565 reg = 13;
6566 sh = htab->sdata[0].sym;
6567 addend -= (sh->root.u.def.value
6568 + sh->root.u.def.section->output_offset
6569 + sh->root.u.def.section->output_section->vma);
6570 }
6571
6572 else if (CONST_STRNEQ (name, ".sdata2")
6573 || CONST_STRNEQ (name, ".sbss2"))
6574 {
6575 reg = 2;
6576 sh = htab->sdata[1].sym;
6577 addend -= (sh->root.u.def.value
6578 + sh->root.u.def.section->output_offset
6579 + sh->root.u.def.section->output_section->vma);
6580 }
6581
6582 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6583 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6584 {
6585 reg = 0;
6586 }
6587
6588 else
6589 {
6590 (*_bfd_error_handler)
6591 (_("%B: the target (%s) of a %s relocation is "
6592 "in the wrong output section (%s)"),
6593 input_bfd,
6594 sym_name,
6595 howto->name,
6596 name);
6597
6598 bfd_set_error (bfd_error_bad_value);
6599 ret = FALSE;
6600 continue;
6601 }
6602
6603 if (r_type == R_PPC_EMB_SDA21)
6604 { /* fill in register field */
6605 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6606 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6607 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6608 }
6609 }
6610 break;
6611
6612 /* Relocate against the beginning of the section. */
6613 case R_PPC_SECTOFF:
6614 case R_PPC_SECTOFF_LO:
6615 case R_PPC_SECTOFF_HI:
6616 case R_PPC_SECTOFF_HA:
6617 BFD_ASSERT (sec != NULL);
6618 addend -= sec->output_section->vma;
6619 break;
6620
6621 /* Negative relocations. */
6622 case R_PPC_EMB_NADDR32:
6623 case R_PPC_EMB_NADDR16:
6624 case R_PPC_EMB_NADDR16_LO:
6625 case R_PPC_EMB_NADDR16_HI:
6626 case R_PPC_EMB_NADDR16_HA:
6627 addend -= 2 * relocation;
6628 break;
6629
6630 case R_PPC_COPY:
6631 case R_PPC_GLOB_DAT:
6632 case R_PPC_JMP_SLOT:
6633 case R_PPC_RELATIVE:
6634 case R_PPC_PLT32:
6635 case R_PPC_PLTREL32:
6636 case R_PPC_PLT16_LO:
6637 case R_PPC_PLT16_HI:
6638 case R_PPC_PLT16_HA:
6639 case R_PPC_ADDR30:
6640 case R_PPC_EMB_RELSEC16:
6641 case R_PPC_EMB_RELST_LO:
6642 case R_PPC_EMB_RELST_HI:
6643 case R_PPC_EMB_RELST_HA:
6644 case R_PPC_EMB_BIT_FLD:
6645 (*_bfd_error_handler)
6646 (_("%B: relocation %s is not yet supported for symbol %s."),
6647 input_bfd,
6648 howto->name,
6649 sym_name);
6650
6651 bfd_set_error (bfd_error_invalid_operation);
6652 ret = FALSE;
6653 continue;
6654 }
6655
6656 /* Do any further special processing. */
6657 switch (r_type)
6658 {
6659 default:
6660 break;
6661
6662 case R_PPC_ADDR16_HA:
6663 case R_PPC_REL16_HA:
6664 case R_PPC_SECTOFF_HA:
6665 case R_PPC_TPREL16_HA:
6666 case R_PPC_DTPREL16_HA:
6667 case R_PPC_EMB_NADDR16_HA:
6668 case R_PPC_EMB_RELST_HA:
6669 /* It's just possible that this symbol is a weak symbol
6670 that's not actually defined anywhere. In that case,
6671 'sec' would be NULL, and we should leave the symbol
6672 alone (it will be set to zero elsewhere in the link). */
6673 if (sec == NULL)
6674 break;
6675 /* Fall thru */
6676
6677 case R_PPC_PLT16_HA:
6678 case R_PPC_GOT16_HA:
6679 case R_PPC_GOT_TLSGD16_HA:
6680 case R_PPC_GOT_TLSLD16_HA:
6681 case R_PPC_GOT_TPREL16_HA:
6682 case R_PPC_GOT_DTPREL16_HA:
6683 /* Add 0x10000 if sign bit in 0:15 is set.
6684 Bits 0:15 are not used. */
6685 addend += 0x8000;
6686 break;
6687 }
6688
6689 #ifdef DEBUG
6690 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6691 "offset = %ld, addend = %ld\n",
6692 howto->name,
6693 (int) r_type,
6694 sym_name,
6695 r_symndx,
6696 (long) rel->r_offset,
6697 (long) addend);
6698 #endif
6699
6700 if (unresolved_reloc
6701 && !((input_section->flags & SEC_DEBUGGING) != 0
6702 && h->def_dynamic))
6703 {
6704 (*_bfd_error_handler)
6705 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6706 input_bfd,
6707 input_section,
6708 (long) rel->r_offset,
6709 howto->name,
6710 sym_name);
6711 ret = FALSE;
6712 }
6713
6714 r = _bfd_final_link_relocate (howto,
6715 input_bfd,
6716 input_section,
6717 contents,
6718 rel->r_offset,
6719 relocation,
6720 addend);
6721
6722 if (r != bfd_reloc_ok)
6723 {
6724 if (r == bfd_reloc_overflow)
6725 {
6726 if (warned)
6727 continue;
6728 if (h != NULL
6729 && h->root.type == bfd_link_hash_undefweak
6730 && howto->pc_relative)
6731 {
6732 /* Assume this is a call protected by other code that
6733 detect the symbol is undefined. If this is the case,
6734 we can safely ignore the overflow. If not, the
6735 program is hosed anyway, and a little warning isn't
6736 going to help. */
6737
6738 continue;
6739 }
6740
6741 if (! (*info->callbacks->reloc_overflow) (info,
6742 (h ? &h->root : NULL),
6743 sym_name,
6744 howto->name,
6745 rel->r_addend,
6746 input_bfd,
6747 input_section,
6748 rel->r_offset))
6749 return FALSE;
6750 }
6751 else
6752 {
6753 (*_bfd_error_handler)
6754 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6755 input_bfd, input_section,
6756 (long) rel->r_offset, howto->name, sym_name, (int) r);
6757 ret = FALSE;
6758 }
6759 }
6760 }
6761
6762 #ifdef DEBUG
6763 fprintf (stderr, "\n");
6764 #endif
6765
6766 return ret;
6767 }
6768 \f
6769 #define PPC_LO(v) ((v) & 0xffff)
6770 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6771 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6772
6773 /* Finish up dynamic symbol handling. We set the contents of various
6774 dynamic sections here. */
6775
6776 static bfd_boolean
6777 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6778 struct bfd_link_info *info,
6779 struct elf_link_hash_entry *h,
6780 Elf_Internal_Sym *sym)
6781 {
6782 struct ppc_elf_link_hash_table *htab;
6783 struct plt_entry *ent;
6784 bfd_boolean doneone;
6785
6786 #ifdef DEBUG
6787 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6788 h->root.root.string);
6789 #endif
6790
6791 htab = ppc_elf_hash_table (info);
6792 BFD_ASSERT (htab->elf.dynobj != NULL);
6793
6794 doneone = FALSE;
6795 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6796 if (ent->plt.offset != (bfd_vma) -1)
6797 {
6798 if (!doneone)
6799 {
6800 Elf_Internal_Rela rela;
6801 bfd_byte *loc;
6802 bfd_vma reloc_index;
6803
6804 if (htab->plt_type == PLT_NEW)
6805 reloc_index = ent->plt.offset / 4;
6806 else
6807 {
6808 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6809 / htab->plt_slot_size);
6810 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6811 && htab->plt_type == PLT_OLD)
6812 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6813 }
6814
6815 /* This symbol has an entry in the procedure linkage table.
6816 Set it up. */
6817 if (htab->plt_type == PLT_VXWORKS)
6818 {
6819 bfd_vma got_offset;
6820 const bfd_vma *plt_entry;
6821
6822 /* The first three entries in .got.plt are reserved. */
6823 got_offset = (reloc_index + 3) * 4;
6824
6825 /* Use the right PLT. */
6826 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6827 : ppc_elf_vxworks_plt_entry;
6828
6829 /* Fill in the .plt on VxWorks. */
6830 if (info->shared)
6831 {
6832 bfd_vma got_offset_hi = (got_offset >> 16)
6833 + ((got_offset & 0x8000) >> 15);
6834
6835 bfd_put_32 (output_bfd,
6836 plt_entry[0] | (got_offset_hi & 0xffff),
6837 htab->plt->contents + ent->plt.offset + 0);
6838 bfd_put_32 (output_bfd,
6839 plt_entry[1] | (got_offset & 0xffff),
6840 htab->plt->contents + ent->plt.offset + 4);
6841 }
6842 else
6843 {
6844 bfd_vma got_loc
6845 = (got_offset
6846 + htab->elf.hgot->root.u.def.value
6847 + htab->elf.hgot->root.u.def.section->output_offset
6848 + htab->elf.hgot->root.u.def.section->output_section->vma);
6849 bfd_vma got_loc_hi = (got_loc >> 16)
6850 + ((got_loc & 0x8000) >> 15);
6851
6852 bfd_put_32 (output_bfd,
6853 plt_entry[0] | (got_loc_hi & 0xffff),
6854 htab->plt->contents + ent->plt.offset + 0);
6855 bfd_put_32 (output_bfd,
6856 plt_entry[1] | (got_loc & 0xffff),
6857 htab->plt->contents + ent->plt.offset + 4);
6858 }
6859
6860 bfd_put_32 (output_bfd, plt_entry[2],
6861 htab->plt->contents + ent->plt.offset + 8);
6862 bfd_put_32 (output_bfd, plt_entry[3],
6863 htab->plt->contents + ent->plt.offset + 12);
6864
6865 /* This instruction is an immediate load. The value loaded is
6866 the byte offset of the R_PPC_JMP_SLOT relocation from the
6867 start of the .rela.plt section. The value is stored in the
6868 low-order 16 bits of the load instruction. */
6869 /* NOTE: It appears that this is now an index rather than a
6870 prescaled offset. */
6871 bfd_put_32 (output_bfd,
6872 plt_entry[4] | reloc_index,
6873 htab->plt->contents + ent->plt.offset + 16);
6874 /* This instruction is a PC-relative branch whose target is
6875 the start of the PLT section. The address of this branch
6876 instruction is 20 bytes beyond the start of this PLT entry.
6877 The address is encoded in bits 6-29, inclusive. The value
6878 stored is right-shifted by two bits, permitting a 26-bit
6879 offset. */
6880 bfd_put_32 (output_bfd,
6881 (plt_entry[5]
6882 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6883 htab->plt->contents + ent->plt.offset + 20);
6884 bfd_put_32 (output_bfd, plt_entry[6],
6885 htab->plt->contents + ent->plt.offset + 24);
6886 bfd_put_32 (output_bfd, plt_entry[7],
6887 htab->plt->contents + ent->plt.offset + 28);
6888
6889 /* Fill in the GOT entry corresponding to this PLT slot with
6890 the address immediately after the the "bctr" instruction
6891 in this PLT entry. */
6892 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6893 + htab->plt->output_offset
6894 + ent->plt.offset + 16),
6895 htab->sgotplt->contents + got_offset);
6896
6897 if (!info->shared)
6898 {
6899 /* Fill in a couple of entries in .rela.plt.unloaded. */
6900 loc = htab->srelplt2->contents
6901 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6902 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6903 * sizeof (Elf32_External_Rela));
6904
6905 /* Provide the @ha relocation for the first instruction. */
6906 rela.r_offset = (htab->plt->output_section->vma
6907 + htab->plt->output_offset
6908 + ent->plt.offset + 2);
6909 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6910 R_PPC_ADDR16_HA);
6911 rela.r_addend = got_offset;
6912 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6913 loc += sizeof (Elf32_External_Rela);
6914
6915 /* Provide the @l relocation for the second instruction. */
6916 rela.r_offset = (htab->plt->output_section->vma
6917 + htab->plt->output_offset
6918 + ent->plt.offset + 6);
6919 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6920 R_PPC_ADDR16_LO);
6921 rela.r_addend = got_offset;
6922 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6923 loc += sizeof (Elf32_External_Rela);
6924
6925 /* Provide a relocation for the GOT entry corresponding to this
6926 PLT slot. Point it at the middle of the .plt entry. */
6927 rela.r_offset = (htab->sgotplt->output_section->vma
6928 + htab->sgotplt->output_offset
6929 + got_offset);
6930 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6931 R_PPC_ADDR32);
6932 rela.r_addend = ent->plt.offset + 16;
6933 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6934 }
6935
6936 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6937 In particular, the offset for the relocation is not the
6938 address of the PLT entry for this function, as specified
6939 by the ABI. Instead, the offset is set to the address of
6940 the GOT slot for this function. See EABI 4.4.4.1. */
6941 rela.r_offset = (htab->sgotplt->output_section->vma
6942 + htab->sgotplt->output_offset
6943 + got_offset);
6944
6945 }
6946 else
6947 {
6948 rela.r_offset = (htab->plt->output_section->vma
6949 + htab->plt->output_offset
6950 + ent->plt.offset);
6951 if (htab->plt_type == PLT_OLD)
6952 {
6953 /* We don't need to fill in the .plt. The ppc dynamic
6954 linker will fill it in. */
6955 }
6956 else
6957 {
6958 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6959 + htab->glink->output_section->vma
6960 + htab->glink->output_offset);
6961 bfd_put_32 (output_bfd, val,
6962 htab->plt->contents + ent->plt.offset);
6963 }
6964 }
6965
6966 /* Fill in the entry in the .rela.plt section. */
6967 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6968 rela.r_addend = 0;
6969
6970 loc = (htab->relplt->contents
6971 + reloc_index * sizeof (Elf32_External_Rela));
6972 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6973
6974 if (!h->def_regular)
6975 {
6976 /* Mark the symbol as undefined, rather than as defined in
6977 the .plt section. Leave the value alone. */
6978 sym->st_shndx = SHN_UNDEF;
6979 /* If the symbol is weak, we do need to clear the value.
6980 Otherwise, the PLT entry would provide a definition for
6981 the symbol even if the symbol wasn't defined anywhere,
6982 and so the symbol would never be NULL. */
6983 if (!h->ref_regular_nonweak)
6984 sym->st_value = 0;
6985 }
6986 doneone = TRUE;
6987 }
6988
6989 if (htab->plt_type == PLT_NEW)
6990 {
6991 bfd_vma plt;
6992 unsigned char *p;
6993
6994 plt = (ent->plt.offset
6995 + htab->plt->output_section->vma
6996 + htab->plt->output_offset);
6997 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6998
6999 if (info->shared || info->pie)
7000 {
7001 bfd_vma got = 0;
7002
7003 if (ent->addend >= 32768)
7004 got = (ent->addend
7005 + ent->sec->output_section->vma
7006 + ent->sec->output_offset);
7007 else if (htab->elf.hgot != NULL)
7008 got = (htab->elf.hgot->root.u.def.value
7009 + htab->elf.hgot->root.u.def.section->output_section->vma
7010 + htab->elf.hgot->root.u.def.section->output_offset);
7011
7012 plt -= got;
7013
7014 if (plt + 0x8000 < 0x10000)
7015 {
7016 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7017 p += 4;
7018 bfd_put_32 (output_bfd, MTCTR_11, p);
7019 p += 4;
7020 bfd_put_32 (output_bfd, BCTR, p);
7021 p += 4;
7022 bfd_put_32 (output_bfd, NOP, p);
7023 p += 4;
7024 }
7025 else
7026 {
7027 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7028 p += 4;
7029 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7030 p += 4;
7031 bfd_put_32 (output_bfd, MTCTR_11, p);
7032 p += 4;
7033 bfd_put_32 (output_bfd, BCTR, p);
7034 p += 4;
7035 }
7036 }
7037 else
7038 {
7039 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7040 p += 4;
7041 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7042 p += 4;
7043 bfd_put_32 (output_bfd, MTCTR_11, p);
7044 p += 4;
7045 bfd_put_32 (output_bfd, BCTR, p);
7046 p += 4;
7047
7048 /* We only need one non-PIC glink stub. */
7049 break;
7050 }
7051 }
7052 else
7053 break;
7054 }
7055
7056 if (h->needs_copy)
7057 {
7058 asection *s;
7059 Elf_Internal_Rela rela;
7060 bfd_byte *loc;
7061
7062 /* This symbols needs a copy reloc. Set it up. */
7063
7064 #ifdef DEBUG
7065 fprintf (stderr, ", copy");
7066 #endif
7067
7068 BFD_ASSERT (h->dynindx != -1);
7069
7070 if (ppc_elf_hash_entry (h)->has_sda_refs)
7071 s = htab->relsbss;
7072 else
7073 s = htab->relbss;
7074 BFD_ASSERT (s != NULL);
7075
7076 rela.r_offset = (h->root.u.def.value
7077 + h->root.u.def.section->output_section->vma
7078 + h->root.u.def.section->output_offset);
7079 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7080 rela.r_addend = 0;
7081 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7082 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7083 }
7084
7085 #ifdef DEBUG
7086 fprintf (stderr, "\n");
7087 #endif
7088
7089 /* Mark some specially defined symbols as absolute. */
7090 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7091 || (!htab->is_vxworks
7092 && (h == htab->elf.hgot
7093 || strcmp (h->root.root.string,
7094 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7095 sym->st_shndx = SHN_ABS;
7096
7097 return TRUE;
7098 }
7099 \f
7100 static enum elf_reloc_type_class
7101 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7102 {
7103 switch (ELF32_R_TYPE (rela->r_info))
7104 {
7105 case R_PPC_RELATIVE:
7106 return reloc_class_relative;
7107 case R_PPC_REL24:
7108 case R_PPC_ADDR24:
7109 case R_PPC_JMP_SLOT:
7110 return reloc_class_plt;
7111 case R_PPC_COPY:
7112 return reloc_class_copy;
7113 default:
7114 return reloc_class_normal;
7115 }
7116 }
7117 \f
7118 /* Finish up the dynamic sections. */
7119
7120 static bfd_boolean
7121 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7122 struct bfd_link_info *info)
7123 {
7124 asection *sdyn;
7125 asection *splt;
7126 struct ppc_elf_link_hash_table *htab;
7127 bfd_vma got;
7128 bfd * dynobj;
7129
7130 #ifdef DEBUG
7131 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7132 #endif
7133
7134 htab = ppc_elf_hash_table (info);
7135 dynobj = elf_hash_table (info)->dynobj;
7136 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7137 if (htab->is_vxworks)
7138 splt = bfd_get_section_by_name (dynobj, ".plt");
7139 else
7140 splt = NULL;
7141
7142 got = 0;
7143 if (htab->elf.hgot != NULL)
7144 got = (htab->elf.hgot->root.u.def.value
7145 + htab->elf.hgot->root.u.def.section->output_section->vma
7146 + htab->elf.hgot->root.u.def.section->output_offset);
7147
7148 if (htab->elf.dynamic_sections_created)
7149 {
7150 Elf32_External_Dyn *dyncon, *dynconend;
7151
7152 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7153
7154 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7155 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7156 for (; dyncon < dynconend; dyncon++)
7157 {
7158 Elf_Internal_Dyn dyn;
7159 asection *s;
7160
7161 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7162
7163 switch (dyn.d_tag)
7164 {
7165 case DT_PLTGOT:
7166 if (htab->is_vxworks)
7167 s = htab->sgotplt;
7168 else
7169 s = htab->plt;
7170 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7171 break;
7172
7173 case DT_PLTRELSZ:
7174 dyn.d_un.d_val = htab->relplt->size;
7175 break;
7176
7177 case DT_JMPREL:
7178 s = htab->relplt;
7179 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7180 break;
7181
7182 case DT_PPC_GOT:
7183 dyn.d_un.d_ptr = got;
7184 break;
7185
7186 case DT_RELASZ:
7187 if (htab->is_vxworks)
7188 {
7189 if (htab->relplt)
7190 dyn.d_un.d_ptr -= htab->relplt->size;
7191 break;
7192 }
7193 continue;
7194
7195 default:
7196 continue;
7197 }
7198
7199 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7200 }
7201 }
7202
7203 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7204 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7205 if (htab->got != NULL)
7206 {
7207 unsigned char *p = htab->got->contents;
7208 bfd_vma val;
7209
7210 p += htab->elf.hgot->root.u.def.value;
7211 if (htab->plt_type == PLT_OLD)
7212 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7213
7214 val = 0;
7215 if (sdyn != NULL)
7216 val = sdyn->output_section->vma + sdyn->output_offset;
7217 bfd_put_32 (output_bfd, val, p);
7218
7219 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7220 }
7221
7222 /* Fill in the first entry in the VxWorks procedure linkage table. */
7223 if (splt && splt->size > 0)
7224 {
7225 /* Use the right PLT. */
7226 static const bfd_vma *plt_entry = NULL;
7227 plt_entry = info->shared ?
7228 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7229
7230 if (!info->shared)
7231 {
7232 bfd_vma got_value =
7233 (htab->elf.hgot->root.u.def.section->output_section->vma
7234 + htab->elf.hgot->root.u.def.section->output_offset
7235 + htab->elf.hgot->root.u.def.value);
7236 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7237
7238 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7239 splt->contents + 0);
7240 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7241 splt->contents + 4);
7242 }
7243 else
7244 {
7245 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7246 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7247 }
7248 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7249 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7250 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7251 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7252 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7253 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7254
7255 if (! info->shared)
7256 {
7257 Elf_Internal_Rela rela;
7258 bfd_byte *loc;
7259
7260 loc = htab->srelplt2->contents;
7261
7262 /* Output the @ha relocation for the first instruction. */
7263 rela.r_offset = (htab->plt->output_section->vma
7264 + htab->plt->output_offset
7265 + 2);
7266 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7267 rela.r_addend = 0;
7268 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7269 loc += sizeof (Elf32_External_Rela);
7270
7271 /* Output the @l relocation for the second instruction. */
7272 rela.r_offset = (htab->plt->output_section->vma
7273 + htab->plt->output_offset
7274 + 6);
7275 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7276 rela.r_addend = 0;
7277 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7278 loc += sizeof (Elf32_External_Rela);
7279
7280 /* Fix up the remaining relocations. They may have the wrong
7281 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7282 in which symbols were output. */
7283 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7284 {
7285 Elf_Internal_Rela rel;
7286
7287 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7288 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7289 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7290 loc += sizeof (Elf32_External_Rela);
7291
7292 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7293 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7294 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7295 loc += sizeof (Elf32_External_Rela);
7296
7297 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7298 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7299 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7300 loc += sizeof (Elf32_External_Rela);
7301 }
7302 }
7303 }
7304
7305 if (htab->glink != NULL && htab->glink->contents != NULL)
7306 {
7307 unsigned char *p;
7308 unsigned char *endp;
7309 bfd_vma res0;
7310 unsigned int i;
7311
7312 /*
7313 * PIC glink code is the following:
7314 *
7315 * # ith PLT code stub.
7316 * addis 11,30,(plt+(i-1)*4-got)@ha
7317 * lwz 11,(plt+(i-1)*4-got)@l(11)
7318 * mtctr 11
7319 * bctr
7320 *
7321 * # A table of branches, one for each plt entry.
7322 * # The idea is that the plt call stub loads ctr (and r11) with these
7323 * # addresses, so (r11 - res_0) gives the plt index * 4.
7324 * res_0: b PLTresolve
7325 * res_1: b PLTresolve
7326 * .
7327 * # Some number of entries towards the end can be nops
7328 * res_n_m3: nop
7329 * res_n_m2: nop
7330 * res_n_m1:
7331 *
7332 * PLTresolve:
7333 * addis 11,11,(1f-res_0)@ha
7334 * mflr 0
7335 * bcl 20,31,1f
7336 * 1: addi 11,11,(1b-res_0)@l
7337 * mflr 12
7338 * mtlr 0
7339 * sub 11,11,12 # r11 = index * 4
7340 * addis 12,12,(got+4-1b)@ha
7341 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7342 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7343 * mtctr 0
7344 * add 0,11,11
7345 * add 11,0,11 # r11 = index * 12 = reloc offset.
7346 * bctr
7347 */
7348 static const unsigned int pic_plt_resolve[] =
7349 {
7350 ADDIS_11_11,
7351 MFLR_0,
7352 BCL_20_31,
7353 ADDI_11_11,
7354 MFLR_12,
7355 MTLR_0,
7356 SUB_11_11_12,
7357 ADDIS_12_12,
7358 LWZ_0_12,
7359 LWZ_12_12,
7360 MTCTR_0,
7361 ADD_0_11_11,
7362 ADD_11_0_11,
7363 BCTR,
7364 NOP,
7365 NOP
7366 };
7367
7368 static const unsigned int plt_resolve[] =
7369 {
7370 LIS_12,
7371 ADDIS_11_11,
7372 LWZ_0_12,
7373 ADDI_11_11,
7374 MTCTR_0,
7375 ADD_0_11_11,
7376 LWZ_12_12,
7377 ADD_11_0_11,
7378 BCTR,
7379 NOP,
7380 NOP,
7381 NOP,
7382 NOP,
7383 NOP,
7384 NOP,
7385 NOP
7386 };
7387
7388 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7389 abort ();
7390 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7391 abort ();
7392
7393 /* Build the branch table, one for each plt entry (less one),
7394 and perhaps some padding. */
7395 p = htab->glink->contents;
7396 p += htab->glink_pltresolve;
7397 endp = htab->glink->contents;
7398 endp += htab->glink->size - GLINK_PLTRESOLVE;
7399 while (p < endp - 8 * 4)
7400 {
7401 bfd_put_32 (output_bfd, B + endp - p, p);
7402 p += 4;
7403 }
7404 while (p < endp)
7405 {
7406 bfd_put_32 (output_bfd, NOP, p);
7407 p += 4;
7408 }
7409
7410 res0 = (htab->glink_pltresolve
7411 + htab->glink->output_section->vma
7412 + htab->glink->output_offset);
7413
7414 /* Last comes the PLTresolve stub. */
7415 if (info->shared || info->pie)
7416 {
7417 bfd_vma bcl;
7418
7419 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7420 {
7421 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7422 p += 4;
7423 }
7424 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7425
7426 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7427 + htab->glink->output_section->vma
7428 + htab->glink->output_offset);
7429
7430 bfd_put_32 (output_bfd,
7431 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7432 bfd_put_32 (output_bfd,
7433 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7434 bfd_put_32 (output_bfd,
7435 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7436 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7437 {
7438 bfd_put_32 (output_bfd,
7439 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7440 bfd_put_32 (output_bfd,
7441 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7442 }
7443 else
7444 {
7445 bfd_put_32 (output_bfd,
7446 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7447 bfd_put_32 (output_bfd,
7448 LWZ_12_12 + 4, p + 9*4);
7449 }
7450 }
7451 else
7452 {
7453 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7454 {
7455 bfd_put_32 (output_bfd, plt_resolve[i], p);
7456 p += 4;
7457 }
7458 p -= 4 * ARRAY_SIZE (plt_resolve);
7459
7460 bfd_put_32 (output_bfd,
7461 LIS_12 + PPC_HA (got + 4), p + 0*4);
7462 bfd_put_32 (output_bfd,
7463 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7464 bfd_put_32 (output_bfd,
7465 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7466 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7467 {
7468 bfd_put_32 (output_bfd,
7469 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7470 bfd_put_32 (output_bfd,
7471 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7472 }
7473 else
7474 {
7475 bfd_put_32 (output_bfd,
7476 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7477 bfd_put_32 (output_bfd,
7478 LWZ_12_12 + 4, p + 6*4);
7479 }
7480 }
7481 }
7482
7483 return TRUE;
7484 }
7485 \f
7486 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7487 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7488 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7489 #define TARGET_BIG_NAME "elf32-powerpc"
7490 #define ELF_ARCH bfd_arch_powerpc
7491 #define ELF_MACHINE_CODE EM_PPC
7492 #ifdef __QNXTARGET__
7493 #define ELF_MAXPAGESIZE 0x1000
7494 #else
7495 #define ELF_MAXPAGESIZE 0x10000
7496 #endif
7497 #define ELF_MINPAGESIZE 0x1000
7498 #define ELF_COMMONPAGESIZE 0x1000
7499 #define elf_info_to_howto ppc_elf_info_to_howto
7500
7501 #ifdef EM_CYGNUS_POWERPC
7502 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7503 #endif
7504
7505 #ifdef EM_PPC_OLD
7506 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7507 #endif
7508
7509 #define elf_backend_plt_not_loaded 1
7510 #define elf_backend_can_gc_sections 1
7511 #define elf_backend_can_refcount 1
7512 #define elf_backend_rela_normal 1
7513
7514 #define bfd_elf32_mkobject ppc_elf_mkobject
7515 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7516 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7517 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7518 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7519 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7520 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7521
7522 #define elf_backend_object_p ppc_elf_object_p
7523 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7524 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7525 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7526 #define elf_backend_relocate_section ppc_elf_relocate_section
7527 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7528 #define elf_backend_check_relocs ppc_elf_check_relocs
7529 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7530 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7531 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7532 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7533 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7534 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7535 #define elf_backend_fake_sections ppc_elf_fake_sections
7536 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7537 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7538 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7539 #define elf_backend_write_core_note ppc_elf_write_core_note
7540 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7541 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7542 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7543 #define elf_backend_write_section ppc_elf_write_section
7544 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7545 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7546 #define elf_backend_action_discarded ppc_elf_action_discarded
7547 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7548
7549 #include "elf32-target.h"
7550
7551 /* VxWorks Target */
7552
7553 #undef TARGET_LITTLE_SYM
7554 #undef TARGET_LITTLE_NAME
7555
7556 #undef TARGET_BIG_SYM
7557 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7558 #undef TARGET_BIG_NAME
7559 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7560
7561 /* VxWorks uses the elf default section flags for .plt. */
7562 static const struct bfd_elf_special_section *
7563 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7564 {
7565 if (sec->name == NULL)
7566 return NULL;
7567
7568 if (strcmp (sec->name, ".plt") == 0)
7569 return _bfd_elf_get_sec_type_attr (abfd, sec);
7570
7571 return ppc_elf_get_sec_type_attr (abfd, sec);
7572 }
7573
7574 /* Like ppc_elf_link_hash_table_create, but overrides
7575 appropriately for VxWorks. */
7576 static struct bfd_link_hash_table *
7577 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7578 {
7579 struct bfd_link_hash_table *ret;
7580
7581 ret = ppc_elf_link_hash_table_create (abfd);
7582 if (ret)
7583 {
7584 struct ppc_elf_link_hash_table *htab
7585 = (struct ppc_elf_link_hash_table *)ret;
7586 htab->is_vxworks = 1;
7587 htab->plt_type = PLT_VXWORKS;
7588 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7589 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7590 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7591 }
7592 return ret;
7593 }
7594
7595 /* Tweak magic VxWorks symbols as they are loaded. */
7596 static bfd_boolean
7597 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7598 struct bfd_link_info *info,
7599 Elf_Internal_Sym *sym,
7600 const char **namep ATTRIBUTE_UNUSED,
7601 flagword *flagsp ATTRIBUTE_UNUSED,
7602 asection **secp,
7603 bfd_vma *valp)
7604 {
7605 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7606 valp))
7607 return FALSE;
7608
7609 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7610 }
7611
7612 static void
7613 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7614 {
7615 ppc_elf_final_write_processing(abfd, linker);
7616 elf_vxworks_final_write_processing(abfd, linker);
7617 }
7618
7619 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7620 define it. */
7621 #undef elf_backend_want_plt_sym
7622 #define elf_backend_want_plt_sym 1
7623 #undef elf_backend_want_got_plt
7624 #define elf_backend_want_got_plt 1
7625 #undef elf_backend_got_symbol_offset
7626 #define elf_backend_got_symbol_offset 0
7627 #undef elf_backend_plt_not_loaded
7628 #define elf_backend_plt_not_loaded 0
7629 #undef elf_backend_plt_readonly
7630 #define elf_backend_plt_readonly 1
7631 #undef elf_backend_got_header_size
7632 #define elf_backend_got_header_size 12
7633
7634 #undef bfd_elf32_bfd_link_hash_table_create
7635 #define bfd_elf32_bfd_link_hash_table_create \
7636 ppc_elf_vxworks_link_hash_table_create
7637 #undef elf_backend_add_symbol_hook
7638 #define elf_backend_add_symbol_hook \
7639 ppc_elf_vxworks_add_symbol_hook
7640 #undef elf_backend_link_output_symbol_hook
7641 #define elf_backend_link_output_symbol_hook \
7642 elf_vxworks_link_output_symbol_hook
7643 #undef elf_backend_final_write_processing
7644 #define elf_backend_final_write_processing \
7645 ppc_elf_vxworks_final_write_processing
7646 #undef elf_backend_get_sec_type_attr
7647 #define elf_backend_get_sec_type_attr \
7648 ppc_elf_vxworks_get_sec_type_attr
7649 #undef elf_backend_emit_relocs
7650 #define elf_backend_emit_relocs \
7651 elf_vxworks_emit_relocs
7652
7653 #undef elf32_bed
7654 #define elf32_bed ppc_elf_vxworks_bed
7655
7656 #include "elf32-target.h"
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