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2007-06-28 Roland McGrath <roland@frob.com>
[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 "sysdep.h"
29 #include <stdarg.h>
30 #include "bfd.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 /* Flags used to auto-detect plt type. */
1717 unsigned int makes_plt_call : 1;
1718 unsigned int has_rel16 : 1;
1719 };
1720
1721 #define ppc_elf_tdata(bfd) \
1722 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1723
1724 #define elf_local_ptr_offsets(bfd) \
1725 (ppc_elf_tdata (bfd)->linker_section_pointers)
1726
1727 /* Override the generic function because we store some extras. */
1728
1729 static bfd_boolean
1730 ppc_elf_mkobject (bfd *abfd)
1731 {
1732 if (abfd->tdata.any == NULL)
1733 {
1734 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1735 abfd->tdata.any = bfd_zalloc (abfd, amt);
1736 if (abfd->tdata.any == NULL)
1737 return FALSE;
1738 }
1739 return bfd_elf_mkobject (abfd);
1740 }
1741
1742 /* Fix bad default arch selected for a 32 bit input bfd when the
1743 default is 64 bit. */
1744
1745 static bfd_boolean
1746 ppc_elf_object_p (bfd *abfd)
1747 {
1748 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1749 {
1750 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1751
1752 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1753 {
1754 /* Relies on arch after 64 bit default being 32 bit default. */
1755 abfd->arch_info = abfd->arch_info->next;
1756 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1757 }
1758 }
1759 return TRUE;
1760 }
1761
1762 /* Function to set whether a module needs the -mrelocatable bit set. */
1763
1764 static bfd_boolean
1765 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1766 {
1767 BFD_ASSERT (!elf_flags_init (abfd)
1768 || elf_elfheader (abfd)->e_flags == flags);
1769
1770 elf_elfheader (abfd)->e_flags = flags;
1771 elf_flags_init (abfd) = TRUE;
1772 return TRUE;
1773 }
1774
1775 /* Support for core dump NOTE sections. */
1776
1777 static bfd_boolean
1778 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1779 {
1780 int offset;
1781 unsigned int size;
1782
1783 switch (note->descsz)
1784 {
1785 default:
1786 return FALSE;
1787
1788 case 268: /* Linux/PPC. */
1789 /* pr_cursig */
1790 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1791
1792 /* pr_pid */
1793 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1794
1795 /* pr_reg */
1796 offset = 72;
1797 size = 192;
1798
1799 break;
1800 }
1801
1802 /* Make a ".reg/999" section. */
1803 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1804 size, note->descpos + offset);
1805 }
1806
1807 static bfd_boolean
1808 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1809 {
1810 switch (note->descsz)
1811 {
1812 default:
1813 return FALSE;
1814
1815 case 128: /* Linux/PPC elf_prpsinfo. */
1816 elf_tdata (abfd)->core_program
1817 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1818 elf_tdata (abfd)->core_command
1819 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1820 }
1821
1822 /* Note that for some reason, a spurious space is tacked
1823 onto the end of the args in some (at least one anyway)
1824 implementations, so strip it off if it exists. */
1825
1826 {
1827 char *command = elf_tdata (abfd)->core_command;
1828 int n = strlen (command);
1829
1830 if (0 < n && command[n - 1] == ' ')
1831 command[n - 1] = '\0';
1832 }
1833
1834 return TRUE;
1835 }
1836
1837 static char *
1838 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1839 {
1840 switch (note_type)
1841 {
1842 default:
1843 return NULL;
1844
1845 case NT_PRPSINFO:
1846 {
1847 char data[128];
1848 va_list ap;
1849
1850 va_start (ap, note_type);
1851 memset (data, 0, 32);
1852 strncpy (data + 32, va_arg (ap, const char *), 16);
1853 strncpy (data + 48, va_arg (ap, const char *), 80);
1854 va_end (ap);
1855 return elfcore_write_note (abfd, buf, bufsiz,
1856 "CORE", note_type, data, sizeof (data));
1857 }
1858
1859 case NT_PRSTATUS:
1860 {
1861 char data[268];
1862 va_list ap;
1863 long pid;
1864 int cursig;
1865 const void *greg;
1866
1867 va_start (ap, note_type);
1868 memset (data, 0, 72);
1869 pid = va_arg (ap, long);
1870 bfd_put_32 (abfd, pid, data + 24);
1871 cursig = va_arg (ap, int);
1872 bfd_put_16 (abfd, cursig, data + 12);
1873 greg = va_arg (ap, const void *);
1874 memcpy (data + 72, greg, 192);
1875 memset (data + 264, 0, 4);
1876 va_end (ap);
1877 return elfcore_write_note (abfd, buf, bufsiz,
1878 "CORE", note_type, data, sizeof (data));
1879 }
1880 }
1881 }
1882
1883 /* Return address for Ith PLT stub in section PLT, for relocation REL
1884 or (bfd_vma) -1 if it should not be included. */
1885
1886 static bfd_vma
1887 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1888 const asection *plt ATTRIBUTE_UNUSED,
1889 const arelent *rel)
1890 {
1891 return rel->address;
1892 }
1893
1894 /* Handle a PowerPC specific section when reading an object file. This
1895 is called when bfd_section_from_shdr finds a section with an unknown
1896 type. */
1897
1898 static bfd_boolean
1899 ppc_elf_section_from_shdr (bfd *abfd,
1900 Elf_Internal_Shdr *hdr,
1901 const char *name,
1902 int shindex)
1903 {
1904 asection *newsect;
1905 flagword flags;
1906
1907 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1908 return FALSE;
1909
1910 newsect = hdr->bfd_section;
1911 flags = bfd_get_section_flags (abfd, newsect);
1912 if (hdr->sh_flags & SHF_EXCLUDE)
1913 flags |= SEC_EXCLUDE;
1914
1915 if (hdr->sh_type == SHT_ORDERED)
1916 flags |= SEC_SORT_ENTRIES;
1917
1918 bfd_set_section_flags (abfd, newsect, flags);
1919 return TRUE;
1920 }
1921
1922 /* Set up any other section flags and such that may be necessary. */
1923
1924 static bfd_boolean
1925 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1926 Elf_Internal_Shdr *shdr,
1927 asection *asect)
1928 {
1929 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1930 shdr->sh_flags |= SHF_EXCLUDE;
1931
1932 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1933 shdr->sh_type = SHT_ORDERED;
1934
1935 return TRUE;
1936 }
1937
1938 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1939 need to bump up the number of section headers. */
1940
1941 static int
1942 ppc_elf_additional_program_headers (bfd *abfd,
1943 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1944 {
1945 asection *s;
1946 int ret = 0;
1947
1948 s = bfd_get_section_by_name (abfd, ".sbss2");
1949 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1950 ++ret;
1951
1952 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1953 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1954 ++ret;
1955
1956 return ret;
1957 }
1958
1959 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1960 .PPC.EMB.sbss0 a normal section, and not a bss section so
1961 that the linker doesn't crater when trying to make more than
1962 2 sections. */
1963
1964 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1965 {
1966 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1967 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1968 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1969 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1970 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1971 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1972 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1973 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1974 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1975 { NULL, 0, 0, 0, 0 }
1976 };
1977
1978 /* This is what we want for new plt/got. */
1979 static struct bfd_elf_special_section ppc_alt_plt =
1980 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1981
1982 static const struct bfd_elf_special_section *
1983 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1984 {
1985 const struct bfd_elf_special_section *ssect;
1986
1987 /* See if this is one of the special sections. */
1988 if (sec->name == NULL)
1989 return NULL;
1990
1991 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1992 sec->use_rela_p);
1993 if (ssect != NULL)
1994 {
1995 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1996 ssect = &ppc_alt_plt;
1997 return ssect;
1998 }
1999
2000 return _bfd_elf_get_sec_type_attr (abfd, sec);
2001 }
2002 \f
2003 /* Very simple linked list structure for recording apuinfo values. */
2004 typedef struct apuinfo_list
2005 {
2006 struct apuinfo_list *next;
2007 unsigned long value;
2008 }
2009 apuinfo_list;
2010
2011 static apuinfo_list *head;
2012
2013
2014 static void
2015 apuinfo_list_init (void)
2016 {
2017 head = NULL;
2018 }
2019
2020 static void
2021 apuinfo_list_add (unsigned long value)
2022 {
2023 apuinfo_list *entry = head;
2024
2025 while (entry != NULL)
2026 {
2027 if (entry->value == value)
2028 return;
2029 entry = entry->next;
2030 }
2031
2032 entry = bfd_malloc (sizeof (* entry));
2033 if (entry == NULL)
2034 return;
2035
2036 entry->value = value;
2037 entry->next = head;
2038 head = entry;
2039 }
2040
2041 static unsigned
2042 apuinfo_list_length (void)
2043 {
2044 apuinfo_list *entry;
2045 unsigned long count;
2046
2047 for (entry = head, count = 0;
2048 entry;
2049 entry = entry->next)
2050 ++ count;
2051
2052 return count;
2053 }
2054
2055 static inline unsigned long
2056 apuinfo_list_element (unsigned long number)
2057 {
2058 apuinfo_list * entry;
2059
2060 for (entry = head;
2061 entry && number --;
2062 entry = entry->next)
2063 ;
2064
2065 return entry ? entry->value : 0;
2066 }
2067
2068 static void
2069 apuinfo_list_finish (void)
2070 {
2071 apuinfo_list *entry;
2072
2073 for (entry = head; entry;)
2074 {
2075 apuinfo_list *next = entry->next;
2076 free (entry);
2077 entry = next;
2078 }
2079
2080 head = NULL;
2081 }
2082
2083 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2084 #define APUINFO_LABEL "APUinfo"
2085
2086 /* Scan the input BFDs and create a linked list of
2087 the APUinfo values that will need to be emitted. */
2088
2089 static void
2090 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2091 {
2092 bfd *ibfd;
2093 asection *asec;
2094 char *buffer;
2095 unsigned num_input_sections;
2096 bfd_size_type output_section_size;
2097 unsigned i;
2098 unsigned num_entries;
2099 unsigned long offset;
2100 unsigned long length;
2101 const char *error_message = NULL;
2102
2103 if (link_info == NULL)
2104 return;
2105
2106 /* Scan the input bfds, looking for apuinfo sections. */
2107 num_input_sections = 0;
2108 output_section_size = 0;
2109
2110 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2111 {
2112 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2113 if (asec)
2114 {
2115 ++ num_input_sections;
2116 output_section_size += asec->size;
2117 }
2118 }
2119
2120 /* We need at least one input sections
2121 in order to make merging worthwhile. */
2122 if (num_input_sections < 1)
2123 return;
2124
2125 /* Just make sure that the output section exists as well. */
2126 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2127 if (asec == NULL)
2128 return;
2129
2130 /* Allocate a buffer for the contents of the input sections. */
2131 buffer = bfd_malloc (output_section_size);
2132 if (buffer == NULL)
2133 return;
2134
2135 offset = 0;
2136 apuinfo_list_init ();
2137
2138 /* Read in the input sections contents. */
2139 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2140 {
2141 unsigned long datum;
2142 char *ptr;
2143
2144 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2145 if (asec == NULL)
2146 continue;
2147
2148 length = asec->size;
2149 if (length < 24)
2150 {
2151 error_message = _("corrupt or empty %s section in %B");
2152 goto fail;
2153 }
2154
2155 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2156 || (bfd_bread (buffer + offset, length, ibfd) != length))
2157 {
2158 error_message = _("unable to read in %s section from %B");
2159 goto fail;
2160 }
2161
2162 /* Process the contents of the section. */
2163 ptr = buffer + offset;
2164 error_message = _("corrupt %s section in %B");
2165
2166 /* Verify the contents of the header. Note - we have to
2167 extract the values this way in order to allow for a
2168 host whose endian-ness is different from the target. */
2169 datum = bfd_get_32 (ibfd, ptr);
2170 if (datum != sizeof APUINFO_LABEL)
2171 goto fail;
2172
2173 datum = bfd_get_32 (ibfd, ptr + 8);
2174 if (datum != 0x2)
2175 goto fail;
2176
2177 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2178 goto fail;
2179
2180 /* Get the number of bytes used for apuinfo entries. */
2181 datum = bfd_get_32 (ibfd, ptr + 4);
2182 if (datum + 20 != length)
2183 goto fail;
2184
2185 /* Make sure that we do not run off the end of the section. */
2186 if (offset + length > output_section_size)
2187 goto fail;
2188
2189 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2190 for (i = 0; i < datum; i += 4)
2191 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2192
2193 /* Update the offset. */
2194 offset += length;
2195 }
2196
2197 error_message = NULL;
2198
2199 /* Compute the size of the output section. */
2200 num_entries = apuinfo_list_length ();
2201 output_section_size = 20 + num_entries * 4;
2202
2203 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2204
2205 if (! bfd_set_section_size (abfd, asec, output_section_size))
2206 ibfd = abfd,
2207 error_message = _("warning: unable to set size of %s section in %B");
2208
2209 fail:
2210 free (buffer);
2211
2212 if (error_message)
2213 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2214 }
2215
2216 /* Prevent the output section from accumulating the input sections'
2217 contents. We have already stored this in our linked list structure. */
2218
2219 static bfd_boolean
2220 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2221 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2222 asection *asec,
2223 bfd_byte *contents ATTRIBUTE_UNUSED)
2224 {
2225 return (apuinfo_list_length ()
2226 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2227 }
2228
2229 /* Finally we can generate the output section. */
2230
2231 static void
2232 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2233 {
2234 bfd_byte *buffer;
2235 asection *asec;
2236 unsigned i;
2237 unsigned num_entries;
2238 bfd_size_type length;
2239
2240 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2241 if (asec == NULL)
2242 return;
2243
2244 if (apuinfo_list_length () == 0)
2245 return;
2246
2247 length = asec->size;
2248 if (length < 20)
2249 return;
2250
2251 buffer = bfd_malloc (length);
2252 if (buffer == NULL)
2253 {
2254 (*_bfd_error_handler)
2255 (_("failed to allocate space for new APUinfo section."));
2256 return;
2257 }
2258
2259 /* Create the apuinfo header. */
2260 num_entries = apuinfo_list_length ();
2261 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2262 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2263 bfd_put_32 (abfd, 0x2, buffer + 8);
2264 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2265
2266 length = 20;
2267 for (i = 0; i < num_entries; i++)
2268 {
2269 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2270 length += 4;
2271 }
2272
2273 if (length != asec->size)
2274 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2275
2276 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2277 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2278
2279 free (buffer);
2280
2281 apuinfo_list_finish ();
2282 }
2283 \f
2284 /* The following functions are specific to the ELF linker, while
2285 functions above are used generally. They appear in this file more
2286 or less in the order in which they are called. eg.
2287 ppc_elf_check_relocs is called early in the link process,
2288 ppc_elf_finish_dynamic_sections is one of the last functions
2289 called. */
2290
2291 /* The PPC linker needs to keep track of the number of relocs that it
2292 decides to copy as dynamic relocs in check_relocs for each symbol.
2293 This is so that it can later discard them if they are found to be
2294 unnecessary. We store the information in a field extending the
2295 regular ELF linker hash table. */
2296
2297 struct ppc_elf_dyn_relocs
2298 {
2299 struct ppc_elf_dyn_relocs *next;
2300
2301 /* The input section of the reloc. */
2302 asection *sec;
2303
2304 /* Total number of relocs copied for the input section. */
2305 bfd_size_type count;
2306
2307 /* Number of pc-relative relocs copied for the input section. */
2308 bfd_size_type pc_count;
2309 };
2310
2311 /* Track PLT entries needed for a given symbol. We might need more
2312 than one glink entry per symbol. */
2313 struct plt_entry
2314 {
2315 struct plt_entry *next;
2316
2317 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2318 This field stores the offset into .got2 used to initialise the
2319 GOT pointer reg. It will always be at least 32768 (and for
2320 current gcc this is the only offset used). */
2321 bfd_vma addend;
2322
2323 /* The .got2 section. */
2324 asection *sec;
2325
2326 /* PLT refcount or offset. */
2327 union
2328 {
2329 bfd_signed_vma refcount;
2330 bfd_vma offset;
2331 } plt;
2332
2333 /* .glink stub offset. */
2334 bfd_vma glink_offset;
2335 };
2336
2337 /* Of those relocs that might be copied as dynamic relocs, this macro
2338 selects those that must be copied when linking a shared library,
2339 even when the symbol is local. */
2340
2341 #define MUST_BE_DYN_RELOC(RTYPE) \
2342 ((RTYPE) != R_PPC_REL24 \
2343 && (RTYPE) != R_PPC_REL14 \
2344 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2345 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2346 && (RTYPE) != R_PPC_REL32)
2347
2348 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2349 copying dynamic variables from a shared lib into an app's dynbss
2350 section, and instead use a dynamic relocation to point into the
2351 shared lib. */
2352 #define ELIMINATE_COPY_RELOCS 1
2353
2354 /* PPC ELF linker hash entry. */
2355
2356 struct ppc_elf_link_hash_entry
2357 {
2358 struct elf_link_hash_entry elf;
2359
2360 /* If this symbol is used in the linker created sections, the processor
2361 specific backend uses this field to map the field into the offset
2362 from the beginning of the section. */
2363 elf_linker_section_pointers_t *linker_section_pointer;
2364
2365 /* Track dynamic relocs copied for this symbol. */
2366 struct ppc_elf_dyn_relocs *dyn_relocs;
2367
2368 /* Contexts in which symbol is used in the GOT (or TOC).
2369 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2370 corresponding relocs are encountered during check_relocs.
2371 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2372 indicate the corresponding GOT entry type is not needed. */
2373 #define TLS_GD 1 /* GD reloc. */
2374 #define TLS_LD 2 /* LD reloc. */
2375 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2376 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2377 #define TLS_TLS 16 /* Any TLS reloc. */
2378 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2379 char tls_mask;
2380
2381 /* Nonzero if we have seen a small data relocation referring to this
2382 symbol. */
2383 unsigned char has_sda_refs;
2384 };
2385
2386 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2387
2388 /* PPC ELF linker hash table. */
2389
2390 struct ppc_elf_link_hash_table
2391 {
2392 struct elf_link_hash_table elf;
2393
2394 /* Short-cuts to get to dynamic linker sections. */
2395 asection *got;
2396 asection *relgot;
2397 asection *glink;
2398 asection *plt;
2399 asection *relplt;
2400 asection *dynbss;
2401 asection *relbss;
2402 asection *dynsbss;
2403 asection *relsbss;
2404 elf_linker_section_t sdata[2];
2405 asection *sbss;
2406
2407 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2408 asection *srelplt2;
2409
2410 /* The .got.plt section (VxWorks only)*/
2411 asection *sgotplt;
2412
2413 /* Shortcut to .__tls_get_addr. */
2414 struct elf_link_hash_entry *tls_get_addr;
2415
2416 /* The bfd that forced an old-style PLT. */
2417 bfd *old_bfd;
2418
2419 /* TLS local dynamic got entry handling. */
2420 union {
2421 bfd_signed_vma refcount;
2422 bfd_vma offset;
2423 } tlsld_got;
2424
2425 /* Offset of PltResolve function in glink. */
2426 bfd_vma glink_pltresolve;
2427
2428 /* Size of reserved GOT entries. */
2429 unsigned int got_header_size;
2430 /* Non-zero if allocating the header left a gap. */
2431 unsigned int got_gap;
2432
2433 /* The type of PLT we have chosen to use. */
2434 enum ppc_elf_plt_type plt_type;
2435
2436 /* Set if we should emit symbols for stubs. */
2437 unsigned int emit_stub_syms:1;
2438
2439 /* True if the target system is VxWorks. */
2440 unsigned int is_vxworks:1;
2441
2442 /* The size of PLT entries. */
2443 int plt_entry_size;
2444 /* The distance between adjacent PLT slots. */
2445 int plt_slot_size;
2446 /* The size of the first PLT entry. */
2447 int plt_initial_entry_size;
2448
2449 /* Small local sym to section mapping cache. */
2450 struct sym_sec_cache sym_sec;
2451 };
2452
2453 /* Get the PPC ELF linker hash table from a link_info structure. */
2454
2455 #define ppc_elf_hash_table(p) \
2456 ((struct ppc_elf_link_hash_table *) (p)->hash)
2457
2458 /* Create an entry in a PPC ELF linker hash table. */
2459
2460 static struct bfd_hash_entry *
2461 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2462 struct bfd_hash_table *table,
2463 const char *string)
2464 {
2465 /* Allocate the structure if it has not already been allocated by a
2466 subclass. */
2467 if (entry == NULL)
2468 {
2469 entry = bfd_hash_allocate (table,
2470 sizeof (struct ppc_elf_link_hash_entry));
2471 if (entry == NULL)
2472 return entry;
2473 }
2474
2475 /* Call the allocation method of the superclass. */
2476 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2477 if (entry != NULL)
2478 {
2479 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2480 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2481 ppc_elf_hash_entry (entry)->tls_mask = 0;
2482 }
2483
2484 return entry;
2485 }
2486
2487 /* Create a PPC ELF linker hash table. */
2488
2489 static struct bfd_link_hash_table *
2490 ppc_elf_link_hash_table_create (bfd *abfd)
2491 {
2492 struct ppc_elf_link_hash_table *ret;
2493
2494 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2495 if (ret == NULL)
2496 return NULL;
2497
2498 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2499 ppc_elf_link_hash_newfunc,
2500 sizeof (struct ppc_elf_link_hash_entry)))
2501 {
2502 free (ret);
2503 return NULL;
2504 }
2505
2506 ret->elf.init_plt_refcount.refcount = 0;
2507 ret->elf.init_plt_refcount.glist = NULL;
2508 ret->elf.init_plt_offset.offset = 0;
2509 ret->elf.init_plt_offset.glist = NULL;
2510
2511 ret->sdata[0].name = ".sdata";
2512 ret->sdata[0].sym_name = "_SDA_BASE_";
2513 ret->sdata[0].bss_name = ".sbss";
2514
2515 ret->sdata[1].name = ".sdata2";
2516 ret->sdata[1].sym_name = "_SDA2_BASE_";
2517 ret->sdata[1].bss_name = ".sbss2";
2518
2519 ret->plt_entry_size = 12;
2520 ret->plt_slot_size = 8;
2521 ret->plt_initial_entry_size = 72;
2522
2523 return &ret->elf.root;
2524 }
2525
2526 /* Create .got and the related sections. */
2527
2528 static bfd_boolean
2529 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2530 {
2531 struct ppc_elf_link_hash_table *htab;
2532 asection *s;
2533 flagword flags;
2534
2535 if (!_bfd_elf_create_got_section (abfd, info))
2536 return FALSE;
2537
2538 htab = ppc_elf_hash_table (info);
2539 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2540 if (s == NULL)
2541 abort ();
2542
2543 if (htab->is_vxworks)
2544 {
2545 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2546 if (!htab->sgotplt)
2547 abort ();
2548 }
2549 else
2550 {
2551 /* The powerpc .got has a blrl instruction in it. Mark it
2552 executable. */
2553 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2554 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2555 if (!bfd_set_section_flags (abfd, s, flags))
2556 return FALSE;
2557 }
2558
2559 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2560 | SEC_LINKER_CREATED | SEC_READONLY);
2561 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2562 if (!htab->relgot
2563 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2564 return FALSE;
2565
2566 return TRUE;
2567 }
2568
2569 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2570 to output sections (just like _bfd_elf_create_dynamic_sections has
2571 to create .dynbss and .rela.bss). */
2572
2573 static bfd_boolean
2574 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2575 {
2576 struct ppc_elf_link_hash_table *htab;
2577 asection *s;
2578 flagword flags;
2579
2580 htab = ppc_elf_hash_table (info);
2581
2582 if (htab->got == NULL
2583 && !ppc_elf_create_got (abfd, info))
2584 return FALSE;
2585
2586 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2587 return FALSE;
2588
2589 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2590 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2591
2592 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2593 htab->glink = s;
2594 if (s == NULL
2595 || !bfd_set_section_alignment (abfd, s, 4))
2596 return FALSE;
2597
2598 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2599 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2600 SEC_ALLOC | SEC_LINKER_CREATED);
2601 htab->dynsbss = s;
2602 if (s == NULL)
2603 return FALSE;
2604
2605 if (! info->shared)
2606 {
2607 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2608 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2609 htab->relsbss = s;
2610 if (s == NULL
2611 || ! bfd_set_section_alignment (abfd, s, 2))
2612 return FALSE;
2613 }
2614
2615 if (htab->is_vxworks
2616 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2617 return FALSE;
2618
2619 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2620 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2621 if (s == NULL)
2622 abort ();
2623
2624 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2625 if (htab->plt_type == PLT_VXWORKS)
2626 /* The VxWorks PLT is a loaded section with contents. */
2627 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2628 return bfd_set_section_flags (abfd, s, flags);
2629 }
2630
2631 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2632
2633 static void
2634 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2635 struct elf_link_hash_entry *dir,
2636 struct elf_link_hash_entry *ind)
2637 {
2638 struct ppc_elf_link_hash_entry *edir, *eind;
2639
2640 edir = (struct ppc_elf_link_hash_entry *) dir;
2641 eind = (struct ppc_elf_link_hash_entry *) ind;
2642
2643 if (eind->dyn_relocs != NULL)
2644 {
2645 if (edir->dyn_relocs != NULL)
2646 {
2647 struct ppc_elf_dyn_relocs **pp;
2648 struct ppc_elf_dyn_relocs *p;
2649
2650 /* Add reloc counts against the indirect sym to the direct sym
2651 list. Merge any entries against the same section. */
2652 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2653 {
2654 struct ppc_elf_dyn_relocs *q;
2655
2656 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2657 if (q->sec == p->sec)
2658 {
2659 q->pc_count += p->pc_count;
2660 q->count += p->count;
2661 *pp = p->next;
2662 break;
2663 }
2664 if (q == NULL)
2665 pp = &p->next;
2666 }
2667 *pp = edir->dyn_relocs;
2668 }
2669
2670 edir->dyn_relocs = eind->dyn_relocs;
2671 eind->dyn_relocs = NULL;
2672 }
2673
2674 edir->tls_mask |= eind->tls_mask;
2675 edir->has_sda_refs |= eind->has_sda_refs;
2676
2677 /* If called to transfer flags for a weakdef during processing
2678 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2679 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2680 if (!(ELIMINATE_COPY_RELOCS
2681 && eind->elf.root.type != bfd_link_hash_indirect
2682 && edir->elf.dynamic_adjusted))
2683 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2684
2685 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2686 edir->elf.ref_regular |= eind->elf.ref_regular;
2687 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2688 edir->elf.needs_plt |= eind->elf.needs_plt;
2689
2690 /* If we were called to copy over info for a weak sym, that's all. */
2691 if (eind->elf.root.type != bfd_link_hash_indirect)
2692 return;
2693
2694 /* Copy over the GOT refcount entries that we may have already seen to
2695 the symbol which just became indirect. */
2696 edir->elf.got.refcount += eind->elf.got.refcount;
2697 eind->elf.got.refcount = 0;
2698
2699 /* And plt entries. */
2700 if (eind->elf.plt.plist != NULL)
2701 {
2702 if (edir->elf.plt.plist != NULL)
2703 {
2704 struct plt_entry **entp;
2705 struct plt_entry *ent;
2706
2707 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2708 {
2709 struct plt_entry *dent;
2710
2711 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2712 if (dent->sec == ent->sec && dent->addend == ent->addend)
2713 {
2714 dent->plt.refcount += ent->plt.refcount;
2715 *entp = ent->next;
2716 break;
2717 }
2718 if (dent == NULL)
2719 entp = &ent->next;
2720 }
2721 *entp = edir->elf.plt.plist;
2722 }
2723
2724 edir->elf.plt.plist = eind->elf.plt.plist;
2725 eind->elf.plt.plist = NULL;
2726 }
2727
2728 if (eind->elf.dynindx != -1)
2729 {
2730 if (edir->elf.dynindx != -1)
2731 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2732 edir->elf.dynstr_index);
2733 edir->elf.dynindx = eind->elf.dynindx;
2734 edir->elf.dynstr_index = eind->elf.dynstr_index;
2735 eind->elf.dynindx = -1;
2736 eind->elf.dynstr_index = 0;
2737 }
2738 }
2739
2740 /* Return 1 if target is one of ours. */
2741
2742 static bfd_boolean
2743 is_ppc_elf_target (const struct bfd_target *targ)
2744 {
2745 extern const bfd_target bfd_elf32_powerpc_vec;
2746 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2747 extern const bfd_target bfd_elf32_powerpcle_vec;
2748
2749 return (targ == &bfd_elf32_powerpc_vec
2750 || targ == &bfd_elf32_powerpc_vxworks_vec
2751 || targ == &bfd_elf32_powerpcle_vec);
2752 }
2753
2754 /* Hook called by the linker routine which adds symbols from an object
2755 file. We use it to put .comm items in .sbss, and not .bss. */
2756
2757 static bfd_boolean
2758 ppc_elf_add_symbol_hook (bfd *abfd,
2759 struct bfd_link_info *info,
2760 Elf_Internal_Sym *sym,
2761 const char **namep ATTRIBUTE_UNUSED,
2762 flagword *flagsp ATTRIBUTE_UNUSED,
2763 asection **secp,
2764 bfd_vma *valp)
2765 {
2766 if (sym->st_shndx == SHN_COMMON
2767 && !info->relocatable
2768 && sym->st_size <= elf_gp_size (abfd)
2769 && is_ppc_elf_target (info->hash->creator))
2770 {
2771 /* Common symbols less than or equal to -G nn bytes are automatically
2772 put into .sbss. */
2773 struct ppc_elf_link_hash_table *htab;
2774
2775 htab = ppc_elf_hash_table (info);
2776 if (htab->sbss == NULL)
2777 {
2778 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2779
2780 if (!htab->elf.dynobj)
2781 htab->elf.dynobj = abfd;
2782
2783 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2784 ".sbss",
2785 flags);
2786 if (htab->sbss == NULL)
2787 return FALSE;
2788 }
2789
2790 *secp = htab->sbss;
2791 *valp = sym->st_size;
2792 }
2793
2794 return TRUE;
2795 }
2796 \f
2797 static bfd_boolean
2798 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2799 elf_linker_section_t *lsect)
2800 {
2801 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2802 TRUE, FALSE, TRUE);
2803 if (lsect->sym == NULL)
2804 return FALSE;
2805 if (lsect->sym->root.type == bfd_link_hash_new)
2806 lsect->sym->non_elf = 0;
2807 lsect->sym->ref_regular = 1;
2808 return TRUE;
2809 }
2810
2811 /* Create a special linker section. */
2812
2813 static bfd_boolean
2814 ppc_elf_create_linker_section (bfd *abfd,
2815 struct bfd_link_info *info,
2816 flagword flags,
2817 elf_linker_section_t *lsect)
2818 {
2819 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2820 asection *s;
2821
2822 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2823 | SEC_LINKER_CREATED);
2824
2825 /* Record the first bfd that needs the special sections. */
2826 if (!htab->elf.dynobj)
2827 htab->elf.dynobj = abfd;
2828
2829 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2830 lsect->name,
2831 flags);
2832 if (s == NULL
2833 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2834 return FALSE;
2835 lsect->section = s;
2836
2837 return create_sdata_sym (htab, lsect);
2838 }
2839
2840 /* Find a linker generated pointer with a given addend and type. */
2841
2842 static elf_linker_section_pointers_t *
2843 elf_find_pointer_linker_section
2844 (elf_linker_section_pointers_t *linker_pointers,
2845 bfd_vma addend,
2846 elf_linker_section_t *lsect)
2847 {
2848 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2849 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2850 return linker_pointers;
2851
2852 return NULL;
2853 }
2854
2855 /* Allocate a pointer to live in a linker created section. */
2856
2857 static bfd_boolean
2858 elf_create_pointer_linker_section (bfd *abfd,
2859 elf_linker_section_t *lsect,
2860 struct elf_link_hash_entry *h,
2861 const Elf_Internal_Rela *rel)
2862 {
2863 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2864 elf_linker_section_pointers_t *linker_section_ptr;
2865 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2866 bfd_size_type amt;
2867
2868 BFD_ASSERT (lsect != NULL);
2869
2870 /* Is this a global symbol? */
2871 if (h != NULL)
2872 {
2873 struct ppc_elf_link_hash_entry *eh;
2874
2875 /* Has this symbol already been allocated? If so, our work is done. */
2876 eh = (struct ppc_elf_link_hash_entry *) h;
2877 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2878 rel->r_addend,
2879 lsect))
2880 return TRUE;
2881
2882 ptr_linker_section_ptr = &eh->linker_section_pointer;
2883 }
2884 else
2885 {
2886 /* Allocation of a pointer to a local symbol. */
2887 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2888
2889 /* Allocate a table to hold the local symbols if first time. */
2890 if (!ptr)
2891 {
2892 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2893
2894 amt = num_symbols;
2895 amt *= sizeof (elf_linker_section_pointers_t *);
2896 ptr = bfd_zalloc (abfd, amt);
2897
2898 if (!ptr)
2899 return FALSE;
2900
2901 elf_local_ptr_offsets (abfd) = ptr;
2902 }
2903
2904 /* Has this symbol already been allocated? If so, our work is done. */
2905 if (elf_find_pointer_linker_section (ptr[r_symndx],
2906 rel->r_addend,
2907 lsect))
2908 return TRUE;
2909
2910 ptr_linker_section_ptr = &ptr[r_symndx];
2911 }
2912
2913 /* Allocate space for a pointer in the linker section, and allocate
2914 a new pointer record from internal memory. */
2915 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2916 amt = sizeof (elf_linker_section_pointers_t);
2917 linker_section_ptr = bfd_alloc (abfd, amt);
2918
2919 if (!linker_section_ptr)
2920 return FALSE;
2921
2922 linker_section_ptr->next = *ptr_linker_section_ptr;
2923 linker_section_ptr->addend = rel->r_addend;
2924 linker_section_ptr->lsect = lsect;
2925 *ptr_linker_section_ptr = linker_section_ptr;
2926
2927 linker_section_ptr->offset = lsect->section->size;
2928 lsect->section->size += 4;
2929
2930 #ifdef DEBUG
2931 fprintf (stderr,
2932 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2933 lsect->name, (long) linker_section_ptr->offset,
2934 (long) lsect->section->size);
2935 #endif
2936
2937 return TRUE;
2938 }
2939
2940 static bfd_boolean
2941 update_local_sym_info (bfd *abfd,
2942 Elf_Internal_Shdr *symtab_hdr,
2943 unsigned long r_symndx,
2944 int tls_type)
2945 {
2946 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2947 char *local_got_tls_masks;
2948
2949 if (local_got_refcounts == NULL)
2950 {
2951 bfd_size_type size = symtab_hdr->sh_info;
2952
2953 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2954 local_got_refcounts = bfd_zalloc (abfd, size);
2955 if (local_got_refcounts == NULL)
2956 return FALSE;
2957 elf_local_got_refcounts (abfd) = local_got_refcounts;
2958 }
2959
2960 local_got_refcounts[r_symndx] += 1;
2961 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2962 local_got_tls_masks[r_symndx] |= tls_type;
2963 return TRUE;
2964 }
2965
2966 static bfd_boolean
2967 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2968 asection *sec, bfd_vma addend)
2969 {
2970 struct plt_entry *ent;
2971
2972 if (addend < 32768)
2973 sec = NULL;
2974 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2975 if (ent->sec == sec && ent->addend == addend)
2976 break;
2977 if (ent == NULL)
2978 {
2979 bfd_size_type amt = sizeof (*ent);
2980 ent = bfd_alloc (abfd, amt);
2981 if (ent == NULL)
2982 return FALSE;
2983 ent->next = h->plt.plist;
2984 ent->sec = sec;
2985 ent->addend = addend;
2986 ent->plt.refcount = 0;
2987 h->plt.plist = ent;
2988 }
2989 ent->plt.refcount += 1;
2990 return TRUE;
2991 }
2992
2993 static struct plt_entry *
2994 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2995 {
2996 struct plt_entry *ent;
2997
2998 if (addend < 32768)
2999 sec = NULL;
3000 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3001 if (ent->sec == sec && ent->addend == addend)
3002 break;
3003 return ent;
3004 }
3005
3006 static void
3007 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3008 {
3009 (*_bfd_error_handler)
3010 (_("%B: relocation %s cannot be used when making a shared object"),
3011 abfd,
3012 ppc_elf_howto_table[r_type]->name);
3013 bfd_set_error (bfd_error_bad_value);
3014 }
3015
3016 /* Look through the relocs for a section during the first phase, and
3017 allocate space in the global offset table or procedure linkage
3018 table. */
3019
3020 static bfd_boolean
3021 ppc_elf_check_relocs (bfd *abfd,
3022 struct bfd_link_info *info,
3023 asection *sec,
3024 const Elf_Internal_Rela *relocs)
3025 {
3026 struct ppc_elf_link_hash_table *htab;
3027 Elf_Internal_Shdr *symtab_hdr;
3028 struct elf_link_hash_entry **sym_hashes;
3029 const Elf_Internal_Rela *rel;
3030 const Elf_Internal_Rela *rel_end;
3031 asection *got2, *sreloc;
3032
3033 if (info->relocatable)
3034 return TRUE;
3035
3036 /* Don't do anything special with non-loaded, non-alloced sections.
3037 In particular, any relocs in such sections should not affect GOT
3038 and PLT reference counting (ie. we don't allow them to create GOT
3039 or PLT entries), there's no possibility or desire to optimize TLS
3040 relocs, and there's not much point in propagating relocs to shared
3041 libs that the dynamic linker won't relocate. */
3042 if ((sec->flags & SEC_ALLOC) == 0)
3043 return TRUE;
3044
3045 #ifdef DEBUG
3046 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3047 sec, abfd);
3048 #endif
3049
3050 /* Initialize howto table if not already done. */
3051 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3052 ppc_elf_howto_init ();
3053
3054 htab = ppc_elf_hash_table (info);
3055 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3056 sym_hashes = elf_sym_hashes (abfd);
3057 got2 = bfd_get_section_by_name (abfd, ".got2");
3058 sreloc = NULL;
3059
3060 rel_end = relocs + sec->reloc_count;
3061 for (rel = relocs; rel < rel_end; rel++)
3062 {
3063 unsigned long r_symndx;
3064 enum elf_ppc_reloc_type r_type;
3065 struct elf_link_hash_entry *h;
3066 int tls_type = 0;
3067
3068 r_symndx = ELF32_R_SYM (rel->r_info);
3069 if (r_symndx < symtab_hdr->sh_info)
3070 h = NULL;
3071 else
3072 {
3073 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3074 while (h->root.type == bfd_link_hash_indirect
3075 || h->root.type == bfd_link_hash_warning)
3076 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3077 }
3078
3079 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3080 This shows up in particular in an R_PPC_ADDR32 in the eabi
3081 startup code. */
3082 if (h != NULL
3083 && htab->got == NULL
3084 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3085 {
3086 if (htab->elf.dynobj == NULL)
3087 htab->elf.dynobj = abfd;
3088 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3089 return FALSE;
3090 BFD_ASSERT (h == htab->elf.hgot);
3091 }
3092
3093 r_type = ELF32_R_TYPE (rel->r_info);
3094 switch (r_type)
3095 {
3096 case R_PPC_GOT_TLSLD16:
3097 case R_PPC_GOT_TLSLD16_LO:
3098 case R_PPC_GOT_TLSLD16_HI:
3099 case R_PPC_GOT_TLSLD16_HA:
3100 htab->tlsld_got.refcount += 1;
3101 tls_type = TLS_TLS | TLS_LD;
3102 goto dogottls;
3103
3104 case R_PPC_GOT_TLSGD16:
3105 case R_PPC_GOT_TLSGD16_LO:
3106 case R_PPC_GOT_TLSGD16_HI:
3107 case R_PPC_GOT_TLSGD16_HA:
3108 tls_type = TLS_TLS | TLS_GD;
3109 goto dogottls;
3110
3111 case R_PPC_GOT_TPREL16:
3112 case R_PPC_GOT_TPREL16_LO:
3113 case R_PPC_GOT_TPREL16_HI:
3114 case R_PPC_GOT_TPREL16_HA:
3115 if (info->shared)
3116 info->flags |= DF_STATIC_TLS;
3117 tls_type = TLS_TLS | TLS_TPREL;
3118 goto dogottls;
3119
3120 case R_PPC_GOT_DTPREL16:
3121 case R_PPC_GOT_DTPREL16_LO:
3122 case R_PPC_GOT_DTPREL16_HI:
3123 case R_PPC_GOT_DTPREL16_HA:
3124 tls_type = TLS_TLS | TLS_DTPREL;
3125 dogottls:
3126 sec->has_tls_reloc = 1;
3127 /* Fall thru */
3128
3129 /* GOT16 relocations */
3130 case R_PPC_GOT16:
3131 case R_PPC_GOT16_LO:
3132 case R_PPC_GOT16_HI:
3133 case R_PPC_GOT16_HA:
3134 /* This symbol requires a global offset table entry. */
3135 if (htab->got == NULL)
3136 {
3137 if (htab->elf.dynobj == NULL)
3138 htab->elf.dynobj = abfd;
3139 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3140 return FALSE;
3141 }
3142 if (h != NULL)
3143 {
3144 h->got.refcount += 1;
3145 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3146 }
3147 else
3148 /* This is a global offset table entry for a local symbol. */
3149 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3150 return FALSE;
3151 break;
3152
3153 /* Indirect .sdata relocation. */
3154 case R_PPC_EMB_SDAI16:
3155 if (info->shared)
3156 {
3157 bad_shared_reloc (abfd, r_type);
3158 return FALSE;
3159 }
3160 if (htab->sdata[0].section == NULL
3161 && !ppc_elf_create_linker_section (abfd, info, 0,
3162 &htab->sdata[0]))
3163 return FALSE;
3164 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3165 h, rel))
3166 return FALSE;
3167 if (h != NULL)
3168 {
3169 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3170 h->non_got_ref = TRUE;
3171 }
3172 break;
3173
3174 /* Indirect .sdata2 relocation. */
3175 case R_PPC_EMB_SDA2I16:
3176 if (info->shared)
3177 {
3178 bad_shared_reloc (abfd, r_type);
3179 return FALSE;
3180 }
3181 if (htab->sdata[1].section == NULL
3182 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3183 &htab->sdata[1]))
3184 return FALSE;
3185 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3186 h, rel))
3187 return FALSE;
3188 if (h != NULL)
3189 {
3190 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3191 h->non_got_ref = TRUE;
3192 }
3193 break;
3194
3195 case R_PPC_SDAREL16:
3196 if (info->shared)
3197 {
3198 bad_shared_reloc (abfd, r_type);
3199 return FALSE;
3200 }
3201 if (htab->sdata[0].sym == NULL
3202 && !create_sdata_sym (htab, &htab->sdata[0]))
3203 return FALSE;
3204 if (h != NULL)
3205 {
3206 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3207 h->non_got_ref = TRUE;
3208 }
3209 break;
3210
3211 case R_PPC_EMB_SDA2REL:
3212 if (info->shared)
3213 {
3214 bad_shared_reloc (abfd, r_type);
3215 return FALSE;
3216 }
3217 if (htab->sdata[1].sym == NULL
3218 && !create_sdata_sym (htab, &htab->sdata[1]))
3219 return FALSE;
3220 if (h != NULL)
3221 {
3222 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3223 h->non_got_ref = TRUE;
3224 }
3225 break;
3226
3227 case R_PPC_EMB_SDA21:
3228 case R_PPC_EMB_RELSDA:
3229 if (info->shared)
3230 {
3231 bad_shared_reloc (abfd, r_type);
3232 return FALSE;
3233 }
3234 if (htab->sdata[0].sym == NULL
3235 && !create_sdata_sym (htab, &htab->sdata[0]))
3236 return FALSE;
3237 if (htab->sdata[1].sym == NULL
3238 && !create_sdata_sym (htab, &htab->sdata[1]))
3239 return FALSE;
3240 if (h != NULL)
3241 {
3242 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3243 h->non_got_ref = TRUE;
3244 }
3245 break;
3246
3247 case R_PPC_EMB_NADDR32:
3248 case R_PPC_EMB_NADDR16:
3249 case R_PPC_EMB_NADDR16_LO:
3250 case R_PPC_EMB_NADDR16_HI:
3251 case R_PPC_EMB_NADDR16_HA:
3252 if (info->shared)
3253 {
3254 bad_shared_reloc (abfd, r_type);
3255 return FALSE;
3256 }
3257 if (h != NULL)
3258 h->non_got_ref = TRUE;
3259 break;
3260
3261 case R_PPC_PLT32:
3262 case R_PPC_PLTREL24:
3263 case R_PPC_PLTREL32:
3264 case R_PPC_PLT16_LO:
3265 case R_PPC_PLT16_HI:
3266 case R_PPC_PLT16_HA:
3267 #ifdef DEBUG
3268 fprintf (stderr, "Reloc requires a PLT entry\n");
3269 #endif
3270 /* This symbol requires a procedure linkage table entry. We
3271 actually build the entry in finish_dynamic_symbol,
3272 because this might be a case of linking PIC code without
3273 linking in any dynamic objects, in which case we don't
3274 need to generate a procedure linkage table after all. */
3275
3276 if (h == NULL)
3277 {
3278 /* It does not make sense to have a procedure linkage
3279 table entry for a local symbol. */
3280 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3281 "local symbol"),
3282 abfd,
3283 sec,
3284 (long) rel->r_offset,
3285 ppc_elf_howto_table[r_type]->name);
3286 bfd_set_error (bfd_error_bad_value);
3287 return FALSE;
3288 }
3289 else
3290 {
3291 bfd_vma addend = 0;
3292
3293 if (r_type == R_PPC_PLTREL24)
3294 {
3295 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3296 addend = rel->r_addend;
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 ppc_elf_tdata (abfd)->has_rel16 = 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 {
3352 htab->plt_type = PLT_OLD;
3353 htab->old_bfd = abfd;
3354 }
3355 break;
3356
3357 /* This relocation describes the C++ object vtable hierarchy.
3358 Reconstruct it for later use during GC. */
3359 case R_PPC_GNU_VTINHERIT:
3360 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3361 return FALSE;
3362 break;
3363
3364 /* This relocation describes which C++ vtable entries are actually
3365 used. Record for later use during GC. */
3366 case R_PPC_GNU_VTENTRY:
3367 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3368 return FALSE;
3369 break;
3370
3371 /* We shouldn't really be seeing these. */
3372 case R_PPC_TPREL32:
3373 if (info->shared)
3374 info->flags |= DF_STATIC_TLS;
3375 goto dodyn;
3376
3377 /* Nor these. */
3378 case R_PPC_DTPMOD32:
3379 case R_PPC_DTPREL32:
3380 goto dodyn;
3381
3382 case R_PPC_TPREL16:
3383 case R_PPC_TPREL16_LO:
3384 case R_PPC_TPREL16_HI:
3385 case R_PPC_TPREL16_HA:
3386 if (info->shared)
3387 info->flags |= DF_STATIC_TLS;
3388 goto dodyn;
3389
3390 case R_PPC_REL32:
3391 if (h == NULL
3392 && got2 != NULL
3393 && (sec->flags & SEC_CODE) != 0
3394 && (info->shared || info->pie)
3395 && htab->plt_type == PLT_UNSET)
3396 {
3397 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3398 the start of a function, which assembles to a REL32
3399 reference to .got2. If we detect one of these, then
3400 force the old PLT layout because the linker cannot
3401 reliably deduce the GOT pointer value needed for
3402 PLT call stubs. */
3403 asection *s;
3404
3405 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3406 r_symndx);
3407 if (s == got2)
3408 {
3409 htab->plt_type = PLT_OLD;
3410 htab->old_bfd = abfd;
3411 }
3412 }
3413 if (h == NULL || h == htab->elf.hgot)
3414 break;
3415 goto dodyn1;
3416
3417 case R_PPC_REL24:
3418 case R_PPC_REL14:
3419 case R_PPC_REL14_BRTAKEN:
3420 case R_PPC_REL14_BRNTAKEN:
3421 if (h == NULL)
3422 break;
3423 if (h == htab->elf.hgot)
3424 {
3425 if (htab->plt_type == PLT_UNSET)
3426 {
3427 htab->plt_type = PLT_OLD;
3428 htab->old_bfd = abfd;
3429 }
3430 break;
3431 }
3432 /* fall through */
3433
3434 case R_PPC_ADDR32:
3435 case R_PPC_ADDR24:
3436 case R_PPC_ADDR16:
3437 case R_PPC_ADDR16_LO:
3438 case R_PPC_ADDR16_HI:
3439 case R_PPC_ADDR16_HA:
3440 case R_PPC_ADDR14:
3441 case R_PPC_ADDR14_BRTAKEN:
3442 case R_PPC_ADDR14_BRNTAKEN:
3443 case R_PPC_UADDR32:
3444 case R_PPC_UADDR16:
3445 dodyn1:
3446 if (h != NULL && !info->shared)
3447 {
3448 /* We may need a plt entry if the symbol turns out to be
3449 a function defined in a dynamic object. */
3450 if (!update_plt_info (abfd, h, NULL, 0))
3451 return FALSE;
3452
3453 /* We may need a copy reloc too. */
3454 h->non_got_ref = 1;
3455 }
3456
3457 dodyn:
3458 /* If we are creating a shared library, and this is a reloc
3459 against a global symbol, or a non PC relative reloc
3460 against a local symbol, then we need to copy the reloc
3461 into the shared library. However, if we are linking with
3462 -Bsymbolic, we do not need to copy a reloc against a
3463 global symbol which is defined in an object we are
3464 including in the link (i.e., DEF_REGULAR is set). At
3465 this point we have not seen all the input files, so it is
3466 possible that DEF_REGULAR is not set now but will be set
3467 later (it is never cleared). In case of a weak definition,
3468 DEF_REGULAR may be cleared later by a strong definition in
3469 a shared library. We account for that possibility below by
3470 storing information in the dyn_relocs field of the hash
3471 table entry. A similar situation occurs when creating
3472 shared libraries and symbol visibility changes render the
3473 symbol local.
3474
3475 If on the other hand, we are creating an executable, we
3476 may need to keep relocations for symbols satisfied by a
3477 dynamic library if we manage to avoid copy relocs for the
3478 symbol. */
3479 if ((info->shared
3480 && (MUST_BE_DYN_RELOC (r_type)
3481 || (h != NULL
3482 && (! info->symbolic
3483 || h->root.type == bfd_link_hash_defweak
3484 || !h->def_regular))))
3485 || (ELIMINATE_COPY_RELOCS
3486 && !info->shared
3487 && h != NULL
3488 && (h->root.type == bfd_link_hash_defweak
3489 || !h->def_regular)))
3490 {
3491 struct ppc_elf_dyn_relocs *p;
3492 struct ppc_elf_dyn_relocs **head;
3493
3494 #ifdef DEBUG
3495 fprintf (stderr,
3496 "ppc_elf_check_relocs needs to "
3497 "create relocation for %s\n",
3498 (h && h->root.root.string
3499 ? h->root.root.string : "<unknown>"));
3500 #endif
3501 if (sreloc == NULL)
3502 {
3503 const char *name;
3504
3505 name = (bfd_elf_string_from_elf_section
3506 (abfd,
3507 elf_elfheader (abfd)->e_shstrndx,
3508 elf_section_data (sec)->rel_hdr.sh_name));
3509 if (name == NULL)
3510 return FALSE;
3511
3512 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3513 && strcmp (bfd_get_section_name (abfd, sec),
3514 name + 5) == 0);
3515
3516 if (htab->elf.dynobj == NULL)
3517 htab->elf.dynobj = abfd;
3518 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3519 if (sreloc == NULL)
3520 {
3521 flagword flags;
3522
3523 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3524 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3525 | SEC_ALLOC | SEC_LOAD);
3526 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3527 name,
3528 flags);
3529 if (sreloc == NULL
3530 || ! bfd_set_section_alignment (htab->elf.dynobj,
3531 sreloc, 2))
3532 return FALSE;
3533 }
3534 elf_section_data (sec)->sreloc = sreloc;
3535 }
3536
3537 /* If this is a global symbol, we count the number of
3538 relocations we need for this symbol. */
3539 if (h != NULL)
3540 {
3541 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3542 }
3543 else
3544 {
3545 /* Track dynamic relocs needed for local syms too.
3546 We really need local syms available to do this
3547 easily. Oh well. */
3548
3549 asection *s;
3550 void *vpp;
3551
3552 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3553 sec, r_symndx);
3554 if (s == NULL)
3555 return FALSE;
3556
3557 vpp = &elf_section_data (s)->local_dynrel;
3558 head = (struct ppc_elf_dyn_relocs **) vpp;
3559 }
3560
3561 p = *head;
3562 if (p == NULL || p->sec != sec)
3563 {
3564 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3565 if (p == NULL)
3566 return FALSE;
3567 p->next = *head;
3568 *head = p;
3569 p->sec = sec;
3570 p->count = 0;
3571 p->pc_count = 0;
3572 }
3573
3574 p->count += 1;
3575 if (!MUST_BE_DYN_RELOC (r_type))
3576 p->pc_count += 1;
3577 }
3578
3579 break;
3580 }
3581 }
3582
3583 return TRUE;
3584 }
3585 \f
3586 /* Merge backend specific data from an object file to the output
3587 object file when linking. */
3588
3589 static bfd_boolean
3590 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3591 {
3592 flagword old_flags;
3593 flagword new_flags;
3594 bfd_boolean error;
3595
3596 if (!is_ppc_elf_target (ibfd->xvec)
3597 || !is_ppc_elf_target (obfd->xvec))
3598 return TRUE;
3599
3600 /* Check if we have the same endianess. */
3601 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3602 return FALSE;
3603
3604 new_flags = elf_elfheader (ibfd)->e_flags;
3605 old_flags = elf_elfheader (obfd)->e_flags;
3606 if (!elf_flags_init (obfd))
3607 {
3608 /* First call, no flags set. */
3609 elf_flags_init (obfd) = TRUE;
3610 elf_elfheader (obfd)->e_flags = new_flags;
3611 }
3612
3613 /* Compatible flags are ok. */
3614 else if (new_flags == old_flags)
3615 ;
3616
3617 /* Incompatible flags. */
3618 else
3619 {
3620 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3621 to be linked with either. */
3622 error = FALSE;
3623 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3624 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3625 {
3626 error = TRUE;
3627 (*_bfd_error_handler)
3628 (_("%B: compiled with -mrelocatable and linked with "
3629 "modules compiled normally"), ibfd);
3630 }
3631 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3632 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3633 {
3634 error = TRUE;
3635 (*_bfd_error_handler)
3636 (_("%B: compiled normally and linked with "
3637 "modules compiled with -mrelocatable"), ibfd);
3638 }
3639
3640 /* The output is -mrelocatable-lib iff both the input files are. */
3641 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3642 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3643
3644 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3645 but each input file is either -mrelocatable or -mrelocatable-lib. */
3646 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3647 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3648 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3649 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3650
3651 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3652 any module uses it. */
3653 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3654
3655 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3656 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3657
3658 /* Warn about any other mismatches. */
3659 if (new_flags != old_flags)
3660 {
3661 error = TRUE;
3662 (*_bfd_error_handler)
3663 (_("%B: uses different e_flags (0x%lx) fields "
3664 "than previous modules (0x%lx)"),
3665 ibfd, (long) new_flags, (long) old_flags);
3666 }
3667
3668 if (error)
3669 {
3670 bfd_set_error (bfd_error_bad_value);
3671 return FALSE;
3672 }
3673 }
3674
3675 return TRUE;
3676 }
3677 \f
3678 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3679 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3680 int
3681 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3682 struct bfd_link_info *info,
3683 enum ppc_elf_plt_type plt_style,
3684 int emit_stub_syms)
3685 {
3686 struct ppc_elf_link_hash_table *htab;
3687 flagword flags;
3688
3689 htab = ppc_elf_hash_table (info);
3690
3691 if (htab->plt_type == PLT_UNSET)
3692 {
3693 if (plt_style == PLT_OLD)
3694 htab->plt_type = PLT_OLD;
3695 else
3696 {
3697 bfd *ibfd;
3698 enum ppc_elf_plt_type plt_type = plt_style;
3699
3700 /* Look through the reloc flags left by ppc_elf_check_relocs.
3701 Use the old style bss plt if a file makes plt calls
3702 without using the new relocs, and if ld isn't given
3703 --secure-plt and we never see REL16 relocs. */
3704 if (plt_type == PLT_UNSET)
3705 plt_type = PLT_OLD;
3706 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3707 if (is_ppc_elf_target (ibfd->xvec))
3708 {
3709 if (ppc_elf_tdata (ibfd)->has_rel16)
3710 plt_type = PLT_NEW;
3711 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3712 {
3713 plt_type = PLT_OLD;
3714 htab->old_bfd = ibfd;
3715 break;
3716 }
3717 }
3718 htab->plt_type = plt_type;
3719 }
3720 }
3721 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3722 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3723
3724 htab->emit_stub_syms = emit_stub_syms;
3725
3726 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3727
3728 if (htab->plt_type == PLT_NEW)
3729 {
3730 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3731 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3732
3733 /* The new PLT is a loaded section. */
3734 if (htab->plt != NULL
3735 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3736 return -1;
3737
3738 /* The new GOT is not executable. */
3739 if (htab->got != NULL
3740 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3741 return -1;
3742 }
3743 else
3744 {
3745 /* Stop an unused .glink section from affecting .text alignment. */
3746 if (htab->glink != NULL
3747 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3748 return -1;
3749 }
3750 return htab->plt_type == PLT_NEW;
3751 }
3752 \f
3753 /* Return the section that should be marked against GC for a given
3754 relocation. */
3755
3756 static asection *
3757 ppc_elf_gc_mark_hook (asection *sec,
3758 struct bfd_link_info *info,
3759 Elf_Internal_Rela *rel,
3760 struct elf_link_hash_entry *h,
3761 Elf_Internal_Sym *sym)
3762 {
3763 if (h != NULL)
3764 switch (ELF32_R_TYPE (rel->r_info))
3765 {
3766 case R_PPC_GNU_VTINHERIT:
3767 case R_PPC_GNU_VTENTRY:
3768 return NULL;
3769 }
3770
3771 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3772 }
3773
3774 /* Update the got, plt and dynamic reloc reference counts for the
3775 section being removed. */
3776
3777 static bfd_boolean
3778 ppc_elf_gc_sweep_hook (bfd *abfd,
3779 struct bfd_link_info *info,
3780 asection *sec,
3781 const Elf_Internal_Rela *relocs)
3782 {
3783 struct ppc_elf_link_hash_table *htab;
3784 Elf_Internal_Shdr *symtab_hdr;
3785 struct elf_link_hash_entry **sym_hashes;
3786 bfd_signed_vma *local_got_refcounts;
3787 const Elf_Internal_Rela *rel, *relend;
3788 asection *got2;
3789
3790 if ((sec->flags & SEC_ALLOC) == 0)
3791 return TRUE;
3792
3793 elf_section_data (sec)->local_dynrel = NULL;
3794
3795 htab = ppc_elf_hash_table (info);
3796 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3797 sym_hashes = elf_sym_hashes (abfd);
3798 local_got_refcounts = elf_local_got_refcounts (abfd);
3799 got2 = bfd_get_section_by_name (abfd, ".got2");
3800
3801 relend = relocs + sec->reloc_count;
3802 for (rel = relocs; rel < relend; rel++)
3803 {
3804 unsigned long r_symndx;
3805 enum elf_ppc_reloc_type r_type;
3806 struct elf_link_hash_entry *h = NULL;
3807
3808 r_symndx = ELF32_R_SYM (rel->r_info);
3809 if (r_symndx >= symtab_hdr->sh_info)
3810 {
3811 struct ppc_elf_dyn_relocs **pp, *p;
3812 struct ppc_elf_link_hash_entry *eh;
3813
3814 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3815 while (h->root.type == bfd_link_hash_indirect
3816 || h->root.type == bfd_link_hash_warning)
3817 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3818 eh = (struct ppc_elf_link_hash_entry *) h;
3819
3820 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3821 if (p->sec == sec)
3822 {
3823 /* Everything must go for SEC. */
3824 *pp = p->next;
3825 break;
3826 }
3827 }
3828
3829 r_type = ELF32_R_TYPE (rel->r_info);
3830 switch (r_type)
3831 {
3832 case R_PPC_GOT_TLSLD16:
3833 case R_PPC_GOT_TLSLD16_LO:
3834 case R_PPC_GOT_TLSLD16_HI:
3835 case R_PPC_GOT_TLSLD16_HA:
3836 htab->tlsld_got.refcount -= 1;
3837 /* Fall thru */
3838
3839 case R_PPC_GOT_TLSGD16:
3840 case R_PPC_GOT_TLSGD16_LO:
3841 case R_PPC_GOT_TLSGD16_HI:
3842 case R_PPC_GOT_TLSGD16_HA:
3843 case R_PPC_GOT_TPREL16:
3844 case R_PPC_GOT_TPREL16_LO:
3845 case R_PPC_GOT_TPREL16_HI:
3846 case R_PPC_GOT_TPREL16_HA:
3847 case R_PPC_GOT_DTPREL16:
3848 case R_PPC_GOT_DTPREL16_LO:
3849 case R_PPC_GOT_DTPREL16_HI:
3850 case R_PPC_GOT_DTPREL16_HA:
3851 case R_PPC_GOT16:
3852 case R_PPC_GOT16_LO:
3853 case R_PPC_GOT16_HI:
3854 case R_PPC_GOT16_HA:
3855 if (h != NULL)
3856 {
3857 if (h->got.refcount > 0)
3858 h->got.refcount--;
3859 }
3860 else if (local_got_refcounts != NULL)
3861 {
3862 if (local_got_refcounts[r_symndx] > 0)
3863 local_got_refcounts[r_symndx]--;
3864 }
3865 break;
3866
3867 case R_PPC_REL24:
3868 case R_PPC_REL14:
3869 case R_PPC_REL14_BRTAKEN:
3870 case R_PPC_REL14_BRNTAKEN:
3871 case R_PPC_REL32:
3872 if (h == NULL || h == htab->elf.hgot)
3873 break;
3874 /* Fall thru */
3875
3876 case R_PPC_ADDR32:
3877 case R_PPC_ADDR24:
3878 case R_PPC_ADDR16:
3879 case R_PPC_ADDR16_LO:
3880 case R_PPC_ADDR16_HI:
3881 case R_PPC_ADDR16_HA:
3882 case R_PPC_ADDR14:
3883 case R_PPC_ADDR14_BRTAKEN:
3884 case R_PPC_ADDR14_BRNTAKEN:
3885 case R_PPC_UADDR32:
3886 case R_PPC_UADDR16:
3887 if (info->shared)
3888 break;
3889
3890 case R_PPC_PLT32:
3891 case R_PPC_PLTREL24:
3892 case R_PPC_PLTREL32:
3893 case R_PPC_PLT16_LO:
3894 case R_PPC_PLT16_HI:
3895 case R_PPC_PLT16_HA:
3896 if (h != NULL)
3897 {
3898 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3899 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3900 if (ent->plt.refcount > 0)
3901 ent->plt.refcount -= 1;
3902 }
3903 break;
3904
3905 default:
3906 break;
3907 }
3908 }
3909 return TRUE;
3910 }
3911 \f
3912 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3913
3914 asection *
3915 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3916 {
3917 struct ppc_elf_link_hash_table *htab;
3918
3919 htab = ppc_elf_hash_table (info);
3920 if (htab->plt_type == PLT_NEW
3921 && htab->plt != NULL
3922 && htab->plt->output_section != NULL)
3923 {
3924 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3925 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3926 }
3927
3928 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3929 FALSE, FALSE, TRUE);
3930 return _bfd_elf_tls_setup (obfd, info);
3931 }
3932
3933 /* Run through all the TLS relocs looking for optimization
3934 opportunities. */
3935
3936 bfd_boolean
3937 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3938 struct bfd_link_info *info)
3939 {
3940 bfd *ibfd;
3941 asection *sec;
3942 struct ppc_elf_link_hash_table *htab;
3943
3944 if (info->relocatable || info->shared)
3945 return TRUE;
3946
3947 htab = ppc_elf_hash_table (info);
3948 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3949 {
3950 Elf_Internal_Sym *locsyms = NULL;
3951 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3952
3953 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3954 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3955 {
3956 Elf_Internal_Rela *relstart, *rel, *relend;
3957 int expecting_tls_get_addr;
3958
3959 /* Read the relocations. */
3960 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3961 info->keep_memory);
3962 if (relstart == NULL)
3963 return FALSE;
3964
3965 expecting_tls_get_addr = 0;
3966 relend = relstart + sec->reloc_count;
3967 for (rel = relstart; rel < relend; rel++)
3968 {
3969 enum elf_ppc_reloc_type r_type;
3970 unsigned long r_symndx;
3971 struct elf_link_hash_entry *h = NULL;
3972 char *tls_mask;
3973 char tls_set, tls_clear;
3974 bfd_boolean is_local;
3975
3976 r_symndx = ELF32_R_SYM (rel->r_info);
3977 if (r_symndx >= symtab_hdr->sh_info)
3978 {
3979 struct elf_link_hash_entry **sym_hashes;
3980
3981 sym_hashes = elf_sym_hashes (ibfd);
3982 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3983 while (h->root.type == bfd_link_hash_indirect
3984 || h->root.type == bfd_link_hash_warning)
3985 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3986 }
3987
3988 is_local = FALSE;
3989 if (h == NULL
3990 || !h->def_dynamic)
3991 is_local = TRUE;
3992
3993 r_type = ELF32_R_TYPE (rel->r_info);
3994 switch (r_type)
3995 {
3996 case R_PPC_GOT_TLSLD16:
3997 case R_PPC_GOT_TLSLD16_LO:
3998 case R_PPC_GOT_TLSLD16_HI:
3999 case R_PPC_GOT_TLSLD16_HA:
4000 /* These relocs should never be against a symbol
4001 defined in a shared lib. Leave them alone if
4002 that turns out to be the case. */
4003 expecting_tls_get_addr = 0;
4004 htab->tlsld_got.refcount -= 1;
4005 if (!is_local)
4006 continue;
4007
4008 /* LD -> LE */
4009 tls_set = 0;
4010 tls_clear = TLS_LD;
4011 expecting_tls_get_addr = 1;
4012 break;
4013
4014 case R_PPC_GOT_TLSGD16:
4015 case R_PPC_GOT_TLSGD16_LO:
4016 case R_PPC_GOT_TLSGD16_HI:
4017 case R_PPC_GOT_TLSGD16_HA:
4018 if (is_local)
4019 /* GD -> LE */
4020 tls_set = 0;
4021 else
4022 /* GD -> IE */
4023 tls_set = TLS_TLS | TLS_TPRELGD;
4024 tls_clear = TLS_GD;
4025 expecting_tls_get_addr = 1;
4026 break;
4027
4028 case R_PPC_GOT_TPREL16:
4029 case R_PPC_GOT_TPREL16_LO:
4030 case R_PPC_GOT_TPREL16_HI:
4031 case R_PPC_GOT_TPREL16_HA:
4032 expecting_tls_get_addr = 0;
4033 if (is_local)
4034 {
4035 /* IE -> LE */
4036 tls_set = 0;
4037 tls_clear = TLS_TPREL;
4038 break;
4039 }
4040 else
4041 continue;
4042
4043 case R_PPC_REL14:
4044 case R_PPC_REL14_BRTAKEN:
4045 case R_PPC_REL14_BRNTAKEN:
4046 case R_PPC_REL24:
4047 if (expecting_tls_get_addr
4048 && h != NULL
4049 && h == htab->tls_get_addr)
4050 {
4051 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
4052 if (ent != NULL && ent->plt.refcount > 0)
4053 ent->plt.refcount -= 1;
4054 }
4055 expecting_tls_get_addr = 0;
4056 continue;
4057
4058 default:
4059 expecting_tls_get_addr = 0;
4060 continue;
4061 }
4062
4063 if (h != NULL)
4064 {
4065 if (tls_set == 0)
4066 {
4067 /* We managed to get rid of a got entry. */
4068 if (h->got.refcount > 0)
4069 h->got.refcount -= 1;
4070 }
4071 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4072 }
4073 else
4074 {
4075 Elf_Internal_Sym *sym;
4076 bfd_signed_vma *lgot_refs;
4077 char *lgot_masks;
4078
4079 if (locsyms == NULL)
4080 {
4081 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4082 if (locsyms == NULL)
4083 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4084 symtab_hdr->sh_info,
4085 0, NULL, NULL, NULL);
4086 if (locsyms == NULL)
4087 {
4088 if (elf_section_data (sec)->relocs != relstart)
4089 free (relstart);
4090 return FALSE;
4091 }
4092 }
4093 sym = locsyms + r_symndx;
4094 lgot_refs = elf_local_got_refcounts (ibfd);
4095 if (lgot_refs == NULL)
4096 abort ();
4097 if (tls_set == 0)
4098 {
4099 /* We managed to get rid of a got entry. */
4100 if (lgot_refs[r_symndx] > 0)
4101 lgot_refs[r_symndx] -= 1;
4102 }
4103 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4104 tls_mask = &lgot_masks[r_symndx];
4105 }
4106
4107 *tls_mask |= tls_set;
4108 *tls_mask &= ~tls_clear;
4109 }
4110
4111 if (elf_section_data (sec)->relocs != relstart)
4112 free (relstart);
4113 }
4114
4115 if (locsyms != NULL
4116 && (symtab_hdr->contents != (unsigned char *) locsyms))
4117 {
4118 if (!info->keep_memory)
4119 free (locsyms);
4120 else
4121 symtab_hdr->contents = (unsigned char *) locsyms;
4122 }
4123 }
4124 return TRUE;
4125 }
4126 \f
4127 /* Adjust a symbol defined by a dynamic object and referenced by a
4128 regular object. The current definition is in some section of the
4129 dynamic object, but we're not including those sections. We have to
4130 change the definition to something the rest of the link can
4131 understand. */
4132
4133 static bfd_boolean
4134 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4135 struct elf_link_hash_entry *h)
4136 {
4137 struct ppc_elf_link_hash_table *htab;
4138 asection *s;
4139
4140 #ifdef DEBUG
4141 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4142 h->root.root.string);
4143 #endif
4144
4145 /* Make sure we know what is going on here. */
4146 htab = ppc_elf_hash_table (info);
4147 BFD_ASSERT (htab->elf.dynobj != NULL
4148 && (h->needs_plt
4149 || h->u.weakdef != NULL
4150 || (h->def_dynamic
4151 && h->ref_regular
4152 && !h->def_regular)));
4153
4154 /* Deal with function syms. */
4155 if (h->type == STT_FUNC
4156 || h->needs_plt)
4157 {
4158 /* Clear procedure linkage table information for any symbol that
4159 won't need a .plt entry. */
4160 struct plt_entry *ent;
4161 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4162 if (ent->plt.refcount > 0)
4163 break;
4164 if (ent == NULL
4165 || SYMBOL_CALLS_LOCAL (info, h)
4166 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4167 && h->root.type == bfd_link_hash_undefweak))
4168 {
4169 /* A PLT entry is not required/allowed when:
4170
4171 1. We are not using ld.so; because then the PLT entry
4172 can't be set up, so we can't use one. In this case,
4173 ppc_elf_adjust_dynamic_symbol won't even be called.
4174
4175 2. GC has rendered the entry unused.
4176
4177 3. We know for certain that a call to this symbol
4178 will go to this object, or will remain undefined. */
4179 h->plt.plist = NULL;
4180 h->needs_plt = 0;
4181 }
4182 return TRUE;
4183 }
4184 else
4185 h->plt.plist = NULL;
4186
4187 /* If this is a weak symbol, and there is a real definition, the
4188 processor independent code will have arranged for us to see the
4189 real definition first, and we can just use the same value. */
4190 if (h->u.weakdef != NULL)
4191 {
4192 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4193 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4194 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4195 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4196 if (ELIMINATE_COPY_RELOCS)
4197 h->non_got_ref = h->u.weakdef->non_got_ref;
4198 return TRUE;
4199 }
4200
4201 /* This is a reference to a symbol defined by a dynamic object which
4202 is not a function. */
4203
4204 /* If we are creating a shared library, we must presume that the
4205 only references to the symbol are via the global offset table.
4206 For such cases we need not do anything here; the relocations will
4207 be handled correctly by relocate_section. */
4208 if (info->shared)
4209 return TRUE;
4210
4211 /* If there are no references to this symbol that do not use the
4212 GOT, we don't need to generate a copy reloc. */
4213 if (!h->non_got_ref)
4214 return TRUE;
4215
4216 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4217 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4218 do this if there are any small data relocations. */
4219 if (ELIMINATE_COPY_RELOCS
4220 && !ppc_elf_hash_entry (h)->has_sda_refs)
4221 {
4222 struct ppc_elf_dyn_relocs *p;
4223 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4224 {
4225 s = p->sec->output_section;
4226 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4227 break;
4228 }
4229
4230 if (p == NULL)
4231 {
4232 h->non_got_ref = 0;
4233 return TRUE;
4234 }
4235 }
4236
4237 if (h->size == 0)
4238 {
4239 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4240 h->root.root.string);
4241 return TRUE;
4242 }
4243
4244 /* We must allocate the symbol in our .dynbss section, which will
4245 become part of the .bss section of the executable. There will be
4246 an entry for this symbol in the .dynsym section. The dynamic
4247 object will contain position independent code, so all references
4248 from the dynamic object to this symbol will go through the global
4249 offset table. The dynamic linker will use the .dynsym entry to
4250 determine the address it must put in the global offset table, so
4251 both the dynamic object and the regular object will refer to the
4252 same memory location for the variable.
4253
4254 Of course, if the symbol is referenced using SDAREL relocs, we
4255 must instead allocate it in .sbss. */
4256
4257 if (ppc_elf_hash_entry (h)->has_sda_refs)
4258 s = htab->dynsbss;
4259 else
4260 s = htab->dynbss;
4261 BFD_ASSERT (s != NULL);
4262
4263 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4264 copy the initial value out of the dynamic object and into the
4265 runtime process image. We need to remember the offset into the
4266 .rela.bss section we are going to use. */
4267 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4268 {
4269 asection *srel;
4270
4271 if (ppc_elf_hash_entry (h)->has_sda_refs)
4272 srel = htab->relsbss;
4273 else
4274 srel = htab->relbss;
4275 BFD_ASSERT (srel != NULL);
4276 srel->size += sizeof (Elf32_External_Rela);
4277 h->needs_copy = 1;
4278 }
4279
4280 return _bfd_elf_adjust_dynamic_copy (h, s);
4281 }
4282 \f
4283 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4284 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4285 specifying the addend on the plt relocation. For -fpic code, the sym
4286 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4287 xxxxxxxx.got2.plt_pic32.<callee>. */
4288
4289 static bfd_boolean
4290 add_stub_sym (struct plt_entry *ent,
4291 struct elf_link_hash_entry *h,
4292 struct bfd_link_info *info)
4293 {
4294 struct elf_link_hash_entry *sh;
4295 size_t len1, len2, len3;
4296 char *name;
4297 const char *stub;
4298 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4299
4300 if (info->shared || info->pie)
4301 stub = ".plt_pic32.";
4302 else
4303 stub = ".plt_call32.";
4304
4305 len1 = strlen (h->root.root.string);
4306 len2 = strlen (stub);
4307 len3 = 0;
4308 if (ent->sec)
4309 len3 = strlen (ent->sec->name);
4310 name = bfd_malloc (len1 + len2 + len3 + 9);
4311 if (name == NULL)
4312 return FALSE;
4313 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4314 if (ent->sec)
4315 memcpy (name + 8, ent->sec->name, len3);
4316 memcpy (name + 8 + len3, stub, len2);
4317 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4318 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4319 if (sh == NULL)
4320 return FALSE;
4321 if (sh->root.type == bfd_link_hash_new)
4322 {
4323 sh->root.type = bfd_link_hash_defined;
4324 sh->root.u.def.section = htab->glink;
4325 sh->root.u.def.value = ent->glink_offset;
4326 sh->ref_regular = 1;
4327 sh->def_regular = 1;
4328 sh->ref_regular_nonweak = 1;
4329 sh->forced_local = 1;
4330 sh->non_elf = 0;
4331 }
4332 return TRUE;
4333 }
4334
4335 /* Allocate NEED contiguous space in .got, and return the offset.
4336 Handles allocation of the got header when crossing 32k. */
4337
4338 static bfd_vma
4339 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4340 {
4341 bfd_vma where;
4342 unsigned int max_before_header;
4343
4344 if (htab->plt_type == PLT_VXWORKS)
4345 {
4346 where = htab->got->size;
4347 htab->got->size += need;
4348 }
4349 else
4350 {
4351 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4352 if (need <= htab->got_gap)
4353 {
4354 where = max_before_header - htab->got_gap;
4355 htab->got_gap -= need;
4356 }
4357 else
4358 {
4359 if (htab->got->size + need > max_before_header
4360 && htab->got->size <= max_before_header)
4361 {
4362 htab->got_gap = max_before_header - htab->got->size;
4363 htab->got->size = max_before_header + htab->got_header_size;
4364 }
4365 where = htab->got->size;
4366 htab->got->size += need;
4367 }
4368 }
4369 return where;
4370 }
4371
4372 /* Allocate space in associated reloc sections for dynamic relocs. */
4373
4374 static bfd_boolean
4375 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4376 {
4377 struct bfd_link_info *info = inf;
4378 struct ppc_elf_link_hash_entry *eh;
4379 struct ppc_elf_link_hash_table *htab;
4380 struct ppc_elf_dyn_relocs *p;
4381
4382 if (h->root.type == bfd_link_hash_indirect)
4383 return TRUE;
4384
4385 if (h->root.type == bfd_link_hash_warning)
4386 /* When warning symbols are created, they **replace** the "real"
4387 entry in the hash table, thus we never get to see the real
4388 symbol in a hash traversal. So look at it now. */
4389 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4390
4391 htab = ppc_elf_hash_table (info);
4392 if (htab->elf.dynamic_sections_created)
4393 {
4394 struct plt_entry *ent;
4395 bfd_boolean doneone = FALSE;
4396 bfd_vma plt_offset = 0, glink_offset = 0;
4397
4398 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4399 if (ent->plt.refcount > 0)
4400 {
4401 /* Make sure this symbol is output as a dynamic symbol. */
4402 if (h->dynindx == -1
4403 && !h->forced_local)
4404 {
4405 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4406 return FALSE;
4407 }
4408
4409 if (info->shared
4410 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4411 {
4412 asection *s = htab->plt;
4413
4414 if (htab->plt_type == PLT_NEW)
4415 {
4416 if (!doneone)
4417 {
4418 plt_offset = s->size;
4419 s->size += 4;
4420 }
4421 ent->plt.offset = plt_offset;
4422
4423 s = htab->glink;
4424 if (!doneone || info->shared || info->pie)
4425 {
4426 glink_offset = s->size;
4427 s->size += GLINK_ENTRY_SIZE;
4428 }
4429 if (!doneone
4430 && !info->shared
4431 && !h->def_regular)
4432 {
4433 h->root.u.def.section = s;
4434 h->root.u.def.value = glink_offset;
4435 }
4436 ent->glink_offset = glink_offset;
4437
4438 if (htab->emit_stub_syms
4439 && !add_stub_sym (ent, h, info))
4440 return FALSE;
4441 }
4442 else
4443 {
4444 if (!doneone)
4445 {
4446 /* If this is the first .plt entry, make room
4447 for the special first entry. */
4448 if (s->size == 0)
4449 s->size += htab->plt_initial_entry_size;
4450
4451 /* The PowerPC PLT is actually composed of two
4452 parts, the first part is 2 words (for a load
4453 and a jump), and then there is a remaining
4454 word available at the end. */
4455 plt_offset = (htab->plt_initial_entry_size
4456 + (htab->plt_slot_size
4457 * ((s->size
4458 - htab->plt_initial_entry_size)
4459 / htab->plt_entry_size)));
4460
4461 /* If this symbol is not defined in a regular
4462 file, and we are not generating a shared
4463 library, then set the symbol to this location
4464 in the .plt. This is required to make
4465 function pointers compare as equal between
4466 the normal executable and the shared library. */
4467 if (! info->shared
4468 && !h->def_regular)
4469 {
4470 h->root.u.def.section = s;
4471 h->root.u.def.value = plt_offset;
4472 }
4473
4474 /* Make room for this entry. */
4475 s->size += htab->plt_entry_size;
4476 /* After the 8192nd entry, room for two entries
4477 is allocated. */
4478 if (htab->plt_type == PLT_OLD
4479 && (s->size - htab->plt_initial_entry_size)
4480 / htab->plt_entry_size
4481 > PLT_NUM_SINGLE_ENTRIES)
4482 s->size += htab->plt_entry_size;
4483 }
4484 ent->plt.offset = plt_offset;
4485 }
4486
4487 /* We also need to make an entry in the .rela.plt section. */
4488 if (!doneone)
4489 {
4490 htab->relplt->size += sizeof (Elf32_External_Rela);
4491
4492 if (htab->plt_type == PLT_VXWORKS)
4493 {
4494 /* Allocate space for the unloaded relocations. */
4495 if (!info->shared)
4496 {
4497 if (ent->plt.offset
4498 == (bfd_vma) htab->plt_initial_entry_size)
4499 {
4500 htab->srelplt2->size
4501 += sizeof (Elf32_External_Rela)
4502 * VXWORKS_PLTRESOLVE_RELOCS;
4503 }
4504
4505 htab->srelplt2->size
4506 += sizeof (Elf32_External_Rela)
4507 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4508 }
4509
4510 /* Every PLT entry has an associated GOT entry in
4511 .got.plt. */
4512 htab->sgotplt->size += 4;
4513 }
4514 doneone = TRUE;
4515 }
4516 }
4517 else
4518 ent->plt.offset = (bfd_vma) -1;
4519 }
4520 else
4521 ent->plt.offset = (bfd_vma) -1;
4522
4523 if (!doneone)
4524 {
4525 h->plt.plist = NULL;
4526 h->needs_plt = 0;
4527 }
4528 }
4529 else
4530 {
4531 h->plt.plist = NULL;
4532 h->needs_plt = 0;
4533 }
4534
4535 eh = (struct ppc_elf_link_hash_entry *) h;
4536 if (eh->elf.got.refcount > 0)
4537 {
4538 /* Make sure this symbol is output as a dynamic symbol. */
4539 if (eh->elf.dynindx == -1
4540 && !eh->elf.forced_local)
4541 {
4542 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4543 return FALSE;
4544 }
4545
4546 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4547 && !eh->elf.def_dynamic)
4548 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4549 eh->elf.got.offset = (bfd_vma) -1;
4550 else
4551 {
4552 bfd_boolean dyn;
4553 unsigned int need = 0;
4554 if ((eh->tls_mask & TLS_TLS) != 0)
4555 {
4556 if ((eh->tls_mask & TLS_LD) != 0)
4557 need += 8;
4558 if ((eh->tls_mask & TLS_GD) != 0)
4559 need += 8;
4560 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4561 need += 4;
4562 if ((eh->tls_mask & TLS_DTPREL) != 0)
4563 need += 4;
4564 }
4565 else
4566 need += 4;
4567 eh->elf.got.offset = allocate_got (htab, need);
4568 dyn = htab->elf.dynamic_sections_created;
4569 if ((info->shared
4570 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4571 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4572 || eh->elf.root.type != bfd_link_hash_undefweak))
4573 {
4574 /* All the entries we allocated need relocs.
4575 Except LD only needs one. */
4576 if ((eh->tls_mask & TLS_LD) != 0)
4577 need -= 4;
4578 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4579 }
4580 }
4581 }
4582 else
4583 eh->elf.got.offset = (bfd_vma) -1;
4584
4585 if (eh->dyn_relocs == NULL)
4586 return TRUE;
4587
4588 /* In the shared -Bsymbolic case, discard space allocated for
4589 dynamic pc-relative relocs against symbols which turn out to be
4590 defined in regular objects. For the normal shared case, discard
4591 space for relocs that have become local due to symbol visibility
4592 changes. */
4593
4594 if (info->shared)
4595 {
4596 /* Relocs that use pc_count are those that appear on a call insn,
4597 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4598 generated via assembly. We want calls to protected symbols to
4599 resolve directly to the function rather than going via the plt.
4600 If people want function pointer comparisons to work as expected
4601 then they should avoid writing weird assembly. */
4602 if (SYMBOL_CALLS_LOCAL (info, h))
4603 {
4604 struct ppc_elf_dyn_relocs **pp;
4605
4606 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4607 {
4608 p->count -= p->pc_count;
4609 p->pc_count = 0;
4610 if (p->count == 0)
4611 *pp = p->next;
4612 else
4613 pp = &p->next;
4614 }
4615 }
4616
4617 /* Also discard relocs on undefined weak syms with non-default
4618 visibility. */
4619 if (eh->dyn_relocs != NULL
4620 && h->root.type == bfd_link_hash_undefweak)
4621 {
4622 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4623 eh->dyn_relocs = NULL;
4624
4625 /* Make sure undefined weak symbols are output as a dynamic
4626 symbol in PIEs. */
4627 else if (h->dynindx == -1
4628 && !h->forced_local)
4629 {
4630 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4631 return FALSE;
4632 }
4633 }
4634 }
4635 else if (ELIMINATE_COPY_RELOCS)
4636 {
4637 /* For the non-shared case, discard space for relocs against
4638 symbols which turn out to need copy relocs or are not
4639 dynamic. */
4640
4641 if (!h->non_got_ref
4642 && h->def_dynamic
4643 && !h->def_regular)
4644 {
4645 /* Make sure this symbol is output as a dynamic symbol.
4646 Undefined weak syms won't yet be marked as dynamic. */
4647 if (h->dynindx == -1
4648 && !h->forced_local)
4649 {
4650 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4651 return FALSE;
4652 }
4653
4654 /* If that succeeded, we know we'll be keeping all the
4655 relocs. */
4656 if (h->dynindx != -1)
4657 goto keep;
4658 }
4659
4660 eh->dyn_relocs = NULL;
4661
4662 keep: ;
4663 }
4664
4665 /* Finally, allocate space. */
4666 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4667 {
4668 asection *sreloc = elf_section_data (p->sec)->sreloc;
4669 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4670 }
4671
4672 return TRUE;
4673 }
4674
4675 /* Find any dynamic relocs that apply to read-only sections. */
4676
4677 static bfd_boolean
4678 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4679 {
4680 struct ppc_elf_dyn_relocs *p;
4681
4682 if (h->root.type == bfd_link_hash_indirect)
4683 return TRUE;
4684
4685 if (h->root.type == bfd_link_hash_warning)
4686 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4687
4688 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4689 {
4690 asection *s = p->sec->output_section;
4691
4692 if (s != NULL
4693 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4694 == (SEC_READONLY | SEC_ALLOC)))
4695 {
4696 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4697
4698 /* Not an error, just cut short the traversal. */
4699 return FALSE;
4700 }
4701 }
4702 return TRUE;
4703 }
4704
4705 /* Set the sizes of the dynamic sections. */
4706
4707 static bfd_boolean
4708 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4709 struct bfd_link_info *info)
4710 {
4711 struct ppc_elf_link_hash_table *htab;
4712 asection *s;
4713 bfd_boolean relocs;
4714 bfd *ibfd;
4715
4716 #ifdef DEBUG
4717 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4718 #endif
4719
4720 htab = ppc_elf_hash_table (info);
4721 BFD_ASSERT (htab->elf.dynobj != NULL);
4722
4723 if (elf_hash_table (info)->dynamic_sections_created)
4724 {
4725 /* Set the contents of the .interp section to the interpreter. */
4726 if (info->executable)
4727 {
4728 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4729 BFD_ASSERT (s != NULL);
4730 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4731 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4732 }
4733 }
4734
4735 if (htab->plt_type == PLT_OLD)
4736 htab->got_header_size = 16;
4737 else if (htab->plt_type == PLT_NEW)
4738 htab->got_header_size = 12;
4739
4740 /* Set up .got offsets for local syms, and space for local dynamic
4741 relocs. */
4742 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4743 {
4744 bfd_signed_vma *local_got;
4745 bfd_signed_vma *end_local_got;
4746 char *lgot_masks;
4747 bfd_size_type locsymcount;
4748 Elf_Internal_Shdr *symtab_hdr;
4749
4750 if (!is_ppc_elf_target (ibfd->xvec))
4751 continue;
4752
4753 for (s = ibfd->sections; s != NULL; s = s->next)
4754 {
4755 struct ppc_elf_dyn_relocs *p;
4756
4757 for (p = ((struct ppc_elf_dyn_relocs *)
4758 elf_section_data (s)->local_dynrel);
4759 p != NULL;
4760 p = p->next)
4761 {
4762 if (!bfd_is_abs_section (p->sec)
4763 && bfd_is_abs_section (p->sec->output_section))
4764 {
4765 /* Input section has been discarded, either because
4766 it is a copy of a linkonce section or due to
4767 linker script /DISCARD/, so we'll be discarding
4768 the relocs too. */
4769 }
4770 else if (p->count != 0)
4771 {
4772 elf_section_data (p->sec)->sreloc->size
4773 += p->count * sizeof (Elf32_External_Rela);
4774 if ((p->sec->output_section->flags
4775 & (SEC_READONLY | SEC_ALLOC))
4776 == (SEC_READONLY | SEC_ALLOC))
4777 info->flags |= DF_TEXTREL;
4778 }
4779 }
4780 }
4781
4782 local_got = elf_local_got_refcounts (ibfd);
4783 if (!local_got)
4784 continue;
4785
4786 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4787 locsymcount = symtab_hdr->sh_info;
4788 end_local_got = local_got + locsymcount;
4789 lgot_masks = (char *) end_local_got;
4790 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4791 if (*local_got > 0)
4792 {
4793 if (*lgot_masks == (TLS_TLS | TLS_LD))
4794 {
4795 /* If just an LD reloc, we'll just use
4796 htab->tlsld_got.offset. */
4797 htab->tlsld_got.refcount += 1;
4798 *local_got = (bfd_vma) -1;
4799 }
4800 else
4801 {
4802 unsigned int need = 0;
4803 if ((*lgot_masks & TLS_TLS) != 0)
4804 {
4805 if ((*lgot_masks & TLS_GD) != 0)
4806 need += 8;
4807 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4808 need += 4;
4809 if ((*lgot_masks & TLS_DTPREL) != 0)
4810 need += 4;
4811 }
4812 else
4813 need += 4;
4814 *local_got = allocate_got (htab, need);
4815 if (info->shared)
4816 htab->relgot->size += (need
4817 * (sizeof (Elf32_External_Rela) / 4));
4818 }
4819 }
4820 else
4821 *local_got = (bfd_vma) -1;
4822 }
4823
4824 if (htab->tlsld_got.refcount > 0)
4825 {
4826 htab->tlsld_got.offset = allocate_got (htab, 8);
4827 if (info->shared)
4828 htab->relgot->size += sizeof (Elf32_External_Rela);
4829 }
4830 else
4831 htab->tlsld_got.offset = (bfd_vma) -1;
4832
4833 /* Allocate space for global sym dynamic relocs. */
4834 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4835
4836 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4837 {
4838 unsigned int g_o_t = 32768;
4839
4840 /* If we haven't allocated the header, do so now. When we get here,
4841 for old plt/got the got size will be 0 to 32764 (not allocated),
4842 or 32780 to 65536 (header allocated). For new plt/got, the
4843 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4844 if (htab->got->size <= 32768)
4845 {
4846 g_o_t = htab->got->size;
4847 if (htab->plt_type == PLT_OLD)
4848 g_o_t += 4;
4849 htab->got->size += htab->got_header_size;
4850 }
4851
4852 htab->elf.hgot->root.u.def.value = g_o_t;
4853 }
4854
4855 if (htab->glink != NULL && htab->glink->size != 0)
4856 {
4857 htab->glink_pltresolve = htab->glink->size;
4858 /* Space for the branch table. */
4859 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4860 /* Pad out to align the start of PLTresolve. */
4861 htab->glink->size += -htab->glink->size & 15;
4862 htab->glink->size += GLINK_PLTRESOLVE;
4863
4864 if (htab->emit_stub_syms)
4865 {
4866 struct elf_link_hash_entry *sh;
4867 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4868 TRUE, FALSE, FALSE);
4869 if (sh == NULL)
4870 return FALSE;
4871 if (sh->root.type == bfd_link_hash_new)
4872 {
4873 sh->root.type = bfd_link_hash_defined;
4874 sh->root.u.def.section = htab->glink;
4875 sh->root.u.def.value = htab->glink_pltresolve;
4876 sh->ref_regular = 1;
4877 sh->def_regular = 1;
4878 sh->ref_regular_nonweak = 1;
4879 sh->forced_local = 1;
4880 sh->non_elf = 0;
4881 }
4882 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4883 TRUE, FALSE, FALSE);
4884 if (sh == NULL)
4885 return FALSE;
4886 if (sh->root.type == bfd_link_hash_new)
4887 {
4888 sh->root.type = bfd_link_hash_defined;
4889 sh->root.u.def.section = htab->glink;
4890 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4891 sh->ref_regular = 1;
4892 sh->def_regular = 1;
4893 sh->ref_regular_nonweak = 1;
4894 sh->forced_local = 1;
4895 sh->non_elf = 0;
4896 }
4897 }
4898 }
4899
4900 /* We've now determined the sizes of the various dynamic sections.
4901 Allocate memory for them. */
4902 relocs = FALSE;
4903 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4904 {
4905 bfd_boolean strip_section = TRUE;
4906
4907 if ((s->flags & SEC_LINKER_CREATED) == 0)
4908 continue;
4909
4910 if (s == htab->plt
4911 || s == htab->glink
4912 || s == htab->got
4913 || s == htab->sgotplt
4914 || s == htab->sbss
4915 || s == htab->dynbss
4916 || s == htab->dynsbss)
4917 {
4918 /* We'd like to strip these sections if they aren't needed, but if
4919 we've exported dynamic symbols from them we must leave them.
4920 It's too late to tell BFD to get rid of the symbols. */
4921 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
4922 strip_section = FALSE;
4923 /* Strip this section if we don't need it; see the
4924 comment below. */
4925 }
4926 else if (s == htab->sdata[0].section
4927 || s == htab->sdata[1].section)
4928 {
4929 /* Strip these too. */
4930 }
4931 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
4932 {
4933 if (s->size != 0)
4934 {
4935 /* Remember whether there are any relocation sections. */
4936 relocs = TRUE;
4937
4938 /* We use the reloc_count field as a counter if we need
4939 to copy relocs into the output file. */
4940 s->reloc_count = 0;
4941 }
4942 }
4943 else
4944 {
4945 /* It's not one of our sections, so don't allocate space. */
4946 continue;
4947 }
4948
4949 if (s->size == 0 && strip_section)
4950 {
4951 /* If we don't need this section, strip it from the
4952 output file. This is mostly to handle .rela.bss and
4953 .rela.plt. We must create both sections in
4954 create_dynamic_sections, because they must be created
4955 before the linker maps input sections to output
4956 sections. The linker does that before
4957 adjust_dynamic_symbol is called, and it is that
4958 function which decides whether anything needs to go
4959 into these sections. */
4960 s->flags |= SEC_EXCLUDE;
4961 continue;
4962 }
4963
4964 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4965 continue;
4966
4967 /* Allocate memory for the section contents. */
4968 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4969 if (s->contents == NULL)
4970 return FALSE;
4971 }
4972
4973 if (htab->elf.dynamic_sections_created)
4974 {
4975 /* Add some entries to the .dynamic section. We fill in the
4976 values later, in ppc_elf_finish_dynamic_sections, but we
4977 must add the entries now so that we get the correct size for
4978 the .dynamic section. The DT_DEBUG entry is filled in by the
4979 dynamic linker and used by the debugger. */
4980 #define add_dynamic_entry(TAG, VAL) \
4981 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4982
4983 if (info->executable)
4984 {
4985 if (!add_dynamic_entry (DT_DEBUG, 0))
4986 return FALSE;
4987 }
4988
4989 if (htab->plt != NULL && htab->plt->size != 0)
4990 {
4991 if (!add_dynamic_entry (DT_PLTGOT, 0)
4992 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4993 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4994 || !add_dynamic_entry (DT_JMPREL, 0))
4995 return FALSE;
4996 }
4997
4998 if (htab->glink != NULL && htab->glink->size != 0)
4999 {
5000 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5001 return FALSE;
5002 }
5003
5004 if (relocs)
5005 {
5006 if (!add_dynamic_entry (DT_RELA, 0)
5007 || !add_dynamic_entry (DT_RELASZ, 0)
5008 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5009 return FALSE;
5010 }
5011
5012 /* If any dynamic relocs apply to a read-only section, then we
5013 need a DT_TEXTREL entry. */
5014 if ((info->flags & DF_TEXTREL) == 0)
5015 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
5016 info);
5017
5018 if ((info->flags & DF_TEXTREL) != 0)
5019 {
5020 if (!add_dynamic_entry (DT_TEXTREL, 0))
5021 return FALSE;
5022 }
5023 }
5024 #undef add_dynamic_entry
5025
5026 return TRUE;
5027 }
5028 \f
5029 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5030
5031 static const int shared_stub_entry[] =
5032 {
5033 0x7c0802a6, /* mflr 0 */
5034 0x429f0005, /* bcl 20, 31, .Lxxx */
5035 0x7d6802a6, /* mflr 11 */
5036 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5037 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5038 0x7c0803a6, /* mtlr 0 */
5039 0x7d6903a6, /* mtctr 11 */
5040 0x4e800420, /* bctr */
5041 };
5042
5043 static const int stub_entry[] =
5044 {
5045 0x3d600000, /* lis 11,xxx@ha */
5046 0x396b0000, /* addi 11,11,xxx@l */
5047 0x7d6903a6, /* mtctr 11 */
5048 0x4e800420, /* bctr */
5049 };
5050
5051 static bfd_boolean
5052 ppc_elf_relax_section (bfd *abfd,
5053 asection *isec,
5054 struct bfd_link_info *link_info,
5055 bfd_boolean *again)
5056 {
5057 struct one_fixup
5058 {
5059 struct one_fixup *next;
5060 asection *tsec;
5061 bfd_vma toff;
5062 bfd_vma trampoff;
5063 };
5064
5065 Elf_Internal_Shdr *symtab_hdr;
5066 bfd_byte *contents = NULL;
5067 Elf_Internal_Sym *isymbuf = NULL;
5068 Elf_Internal_Rela *internal_relocs = NULL;
5069 Elf_Internal_Rela *irel, *irelend;
5070 struct one_fixup *fixups = NULL;
5071 bfd_boolean changed;
5072 struct ppc_elf_link_hash_table *htab;
5073 bfd_size_type trampoff;
5074 asection *got2;
5075
5076 *again = FALSE;
5077
5078 /* Nothing to do if there are no relocations, and no need to do
5079 anything with non-alloc sections. */
5080 if ((isec->flags & SEC_ALLOC) == 0
5081 || (isec->flags & SEC_RELOC) == 0
5082 || isec->reloc_count == 0)
5083 return TRUE;
5084
5085 trampoff = (isec->size + 3) & (bfd_vma) -4;
5086 /* Space for a branch around any trampolines. */
5087 trampoff += 4;
5088
5089 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5090
5091 /* Get a copy of the native relocations. */
5092 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5093 link_info->keep_memory);
5094 if (internal_relocs == NULL)
5095 goto error_return;
5096
5097 htab = ppc_elf_hash_table (link_info);
5098 got2 = bfd_get_section_by_name (abfd, ".got2");
5099
5100 irelend = internal_relocs + isec->reloc_count;
5101 for (irel = internal_relocs; irel < irelend; irel++)
5102 {
5103 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5104 bfd_vma symaddr, reladdr, toff, roff;
5105 asection *tsec;
5106 struct one_fixup *f;
5107 size_t insn_offset = 0;
5108 bfd_vma max_branch_offset, val;
5109 bfd_byte *hit_addr;
5110 unsigned long t0;
5111 unsigned char sym_type;
5112
5113 switch (r_type)
5114 {
5115 case R_PPC_REL24:
5116 case R_PPC_LOCAL24PC:
5117 case R_PPC_PLTREL24:
5118 max_branch_offset = 1 << 25;
5119 break;
5120
5121 case R_PPC_REL14:
5122 case R_PPC_REL14_BRTAKEN:
5123 case R_PPC_REL14_BRNTAKEN:
5124 max_branch_offset = 1 << 15;
5125 break;
5126
5127 default:
5128 continue;
5129 }
5130
5131 /* Get the value of the symbol referred to by the reloc. */
5132 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5133 {
5134 /* A local symbol. */
5135 Elf_Internal_Sym *isym;
5136
5137 /* Read this BFD's local symbols. */
5138 if (isymbuf == NULL)
5139 {
5140 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5141 if (isymbuf == NULL)
5142 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5143 symtab_hdr->sh_info, 0,
5144 NULL, NULL, NULL);
5145 if (isymbuf == 0)
5146 goto error_return;
5147 }
5148 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5149 if (isym->st_shndx == SHN_UNDEF)
5150 continue; /* We can't do anything with undefined symbols. */
5151 else if (isym->st_shndx == SHN_ABS)
5152 tsec = bfd_abs_section_ptr;
5153 else if (isym->st_shndx == SHN_COMMON)
5154 tsec = bfd_com_section_ptr;
5155 else
5156 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5157
5158 toff = isym->st_value;
5159 sym_type = ELF_ST_TYPE (isym->st_info);
5160 }
5161 else
5162 {
5163 /* Global symbol handling. */
5164 unsigned long indx;
5165 struct elf_link_hash_entry *h;
5166
5167 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5168 h = elf_sym_hashes (abfd)[indx];
5169
5170 while (h->root.type == bfd_link_hash_indirect
5171 || h->root.type == bfd_link_hash_warning)
5172 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5173
5174 tsec = NULL;
5175 toff = 0;
5176 if (r_type == R_PPC_PLTREL24
5177 && htab->plt != NULL)
5178 {
5179 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5180
5181 if (ent != NULL)
5182 {
5183 if (htab->plt_type == PLT_NEW)
5184 {
5185 tsec = htab->glink;
5186 toff = ent->glink_offset;
5187 }
5188 else
5189 {
5190 tsec = htab->plt;
5191 toff = ent->plt.offset;
5192 }
5193 }
5194 }
5195 if (tsec != NULL)
5196 ;
5197 else if (h->root.type == bfd_link_hash_defined
5198 || h->root.type == bfd_link_hash_defweak)
5199 {
5200 tsec = h->root.u.def.section;
5201 toff = h->root.u.def.value;
5202 }
5203 else
5204 continue;
5205
5206 sym_type = h->type;
5207 }
5208
5209 /* If the branch and target are in the same section, you have
5210 no hope of adding stubs. We'll error out later should the
5211 branch overflow. */
5212 if (tsec == isec)
5213 continue;
5214
5215 /* There probably isn't any reason to handle symbols in
5216 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5217 attribute for a code section, and we are only looking at
5218 branches. However, implement it correctly here as a
5219 reference for other target relax_section functions. */
5220 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5221 {
5222 /* At this stage in linking, no SEC_MERGE symbol has been
5223 adjusted, so all references to such symbols need to be
5224 passed through _bfd_merged_section_offset. (Later, in
5225 relocate_section, all SEC_MERGE symbols *except* for
5226 section symbols have been adjusted.)
5227
5228 gas may reduce relocations against symbols in SEC_MERGE
5229 sections to a relocation against the section symbol when
5230 the original addend was zero. When the reloc is against
5231 a section symbol we should include the addend in the
5232 offset passed to _bfd_merged_section_offset, since the
5233 location of interest is the original symbol. On the
5234 other hand, an access to "sym+addend" where "sym" is not
5235 a section symbol should not include the addend; Such an
5236 access is presumed to be an offset from "sym"; The
5237 location of interest is just "sym". */
5238 if (sym_type == STT_SECTION)
5239 toff += irel->r_addend;
5240
5241 toff = _bfd_merged_section_offset (abfd, &tsec,
5242 elf_section_data (tsec)->sec_info,
5243 toff);
5244
5245 if (sym_type != STT_SECTION)
5246 toff += irel->r_addend;
5247 }
5248 /* PLTREL24 addends are special. */
5249 else if (r_type != R_PPC_PLTREL24)
5250 toff += irel->r_addend;
5251
5252 /* Attempted -shared link of non-pic code loses. */
5253 if (tsec->output_section == NULL)
5254 continue;
5255
5256 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5257
5258 roff = irel->r_offset;
5259 reladdr = isec->output_section->vma + isec->output_offset + roff;
5260
5261 /* If the branch is in range, no need to do anything. */
5262 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5263 continue;
5264
5265 /* Look for an existing fixup to this address. */
5266 for (f = fixups; f ; f = f->next)
5267 if (f->tsec == tsec && f->toff == toff)
5268 break;
5269
5270 if (f == NULL)
5271 {
5272 size_t size;
5273 unsigned long stub_rtype;
5274
5275 val = trampoff - roff;
5276 if (val >= max_branch_offset)
5277 /* Oh dear, we can't reach a trampoline. Don't try to add
5278 one. We'll report an error later. */
5279 continue;
5280
5281 if (link_info->shared)
5282 {
5283 size = 4 * ARRAY_SIZE (shared_stub_entry);
5284 insn_offset = 12;
5285 stub_rtype = R_PPC_RELAX32PC;
5286 }
5287 else
5288 {
5289 size = 4 * ARRAY_SIZE (stub_entry);
5290 insn_offset = 0;
5291 stub_rtype = R_PPC_RELAX32;
5292 }
5293
5294 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5295 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5296 abort ();
5297 if (tsec == htab->plt
5298 || tsec == htab->glink)
5299 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5300
5301 /* Hijack the old relocation. Since we need two
5302 relocations for this use a "composite" reloc. */
5303 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5304 stub_rtype);
5305 irel->r_offset = trampoff + insn_offset;
5306
5307 /* Record the fixup so we don't do it again this section. */
5308 f = bfd_malloc (sizeof (*f));
5309 f->next = fixups;
5310 f->tsec = tsec;
5311 f->toff = toff;
5312 f->trampoff = trampoff;
5313 fixups = f;
5314
5315 trampoff += size;
5316 }
5317 else
5318 {
5319 val = f->trampoff - roff;
5320 if (val >= max_branch_offset)
5321 continue;
5322
5323 /* Nop out the reloc, since we're finalizing things here. */
5324 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5325 }
5326
5327 /* Get the section contents. */
5328 if (contents == NULL)
5329 {
5330 /* Get cached copy if it exists. */
5331 if (elf_section_data (isec)->this_hdr.contents != NULL)
5332 contents = elf_section_data (isec)->this_hdr.contents;
5333 else
5334 {
5335 /* Go get them off disk. */
5336 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5337 goto error_return;
5338 }
5339 }
5340
5341 /* Fix up the existing branch to hit the trampoline. */
5342 hit_addr = contents + roff;
5343 switch (r_type)
5344 {
5345 case R_PPC_REL24:
5346 case R_PPC_LOCAL24PC:
5347 case R_PPC_PLTREL24:
5348 t0 = bfd_get_32 (abfd, hit_addr);
5349 t0 &= ~0x3fffffc;
5350 t0 |= val & 0x3fffffc;
5351 bfd_put_32 (abfd, t0, hit_addr);
5352 break;
5353
5354 case R_PPC_REL14:
5355 case R_PPC_REL14_BRTAKEN:
5356 case R_PPC_REL14_BRNTAKEN:
5357 t0 = bfd_get_32 (abfd, hit_addr);
5358 t0 &= ~0xfffc;
5359 t0 |= val & 0xfffc;
5360 bfd_put_32 (abfd, t0, hit_addr);
5361 break;
5362 }
5363 }
5364
5365 /* Write out the trampolines. */
5366 changed = fixups != NULL;
5367 if (fixups != NULL)
5368 {
5369 const int *stub;
5370 bfd_byte *dest;
5371 bfd_vma val;
5372 int i, size;
5373
5374 do
5375 {
5376 struct one_fixup *f = fixups;
5377 fixups = fixups->next;
5378 free (f);
5379 }
5380 while (fixups);
5381
5382 contents = bfd_realloc (contents, trampoff);
5383 if (contents == NULL)
5384 goto error_return;
5385
5386 isec->size = (isec->size + 3) & (bfd_vma) -4;
5387 /* Branch around the trampolines. */
5388 val = trampoff - isec->size + 0x48000000;
5389 dest = contents + isec->size;
5390 isec->size = trampoff;
5391 bfd_put_32 (abfd, val, dest);
5392 dest += 4;
5393
5394 if (link_info->shared)
5395 {
5396 stub = shared_stub_entry;
5397 size = ARRAY_SIZE (shared_stub_entry);
5398 }
5399 else
5400 {
5401 stub = stub_entry;
5402 size = ARRAY_SIZE (stub_entry);
5403 }
5404
5405 i = 0;
5406 while (dest < contents + trampoff)
5407 {
5408 bfd_put_32 (abfd, stub[i], dest);
5409 i++;
5410 if (i == size)
5411 i = 0;
5412 dest += 4;
5413 }
5414 BFD_ASSERT (i == 0);
5415 }
5416
5417 if (isymbuf != NULL
5418 && symtab_hdr->contents != (unsigned char *) isymbuf)
5419 {
5420 if (! link_info->keep_memory)
5421 free (isymbuf);
5422 else
5423 {
5424 /* Cache the symbols for elf_link_input_bfd. */
5425 symtab_hdr->contents = (unsigned char *) isymbuf;
5426 }
5427 }
5428
5429 if (contents != NULL
5430 && elf_section_data (isec)->this_hdr.contents != contents)
5431 {
5432 if (!changed && !link_info->keep_memory)
5433 free (contents);
5434 else
5435 {
5436 /* Cache the section contents for elf_link_input_bfd. */
5437 elf_section_data (isec)->this_hdr.contents = contents;
5438 }
5439 }
5440
5441 if (elf_section_data (isec)->relocs != internal_relocs)
5442 {
5443 if (!changed)
5444 free (internal_relocs);
5445 else
5446 elf_section_data (isec)->relocs = internal_relocs;
5447 }
5448
5449 *again = changed;
5450 return TRUE;
5451
5452 error_return:
5453 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5454 free (isymbuf);
5455 if (contents != NULL
5456 && elf_section_data (isec)->this_hdr.contents != contents)
5457 free (contents);
5458 if (internal_relocs != NULL
5459 && elf_section_data (isec)->relocs != internal_relocs)
5460 free (internal_relocs);
5461 return FALSE;
5462 }
5463 \f
5464 /* What to do when ld finds relocations against symbols defined in
5465 discarded sections. */
5466
5467 static unsigned int
5468 ppc_elf_action_discarded (asection *sec)
5469 {
5470 if (strcmp (".fixup", sec->name) == 0)
5471 return 0;
5472
5473 if (strcmp (".got2", sec->name) == 0)
5474 return 0;
5475
5476 return _bfd_elf_default_action_discarded (sec);
5477 }
5478 \f
5479 /* Fill in the address for a pointer generated in a linker section. */
5480
5481 static bfd_vma
5482 elf_finish_pointer_linker_section (bfd *input_bfd,
5483 elf_linker_section_t *lsect,
5484 struct elf_link_hash_entry *h,
5485 bfd_vma relocation,
5486 const Elf_Internal_Rela *rel)
5487 {
5488 elf_linker_section_pointers_t *linker_section_ptr;
5489
5490 BFD_ASSERT (lsect != NULL);
5491
5492 if (h != NULL)
5493 {
5494 /* Handle global symbol. */
5495 struct ppc_elf_link_hash_entry *eh;
5496
5497 eh = (struct ppc_elf_link_hash_entry *) h;
5498 BFD_ASSERT (eh->elf.def_regular);
5499 linker_section_ptr = eh->linker_section_pointer;
5500 }
5501 else
5502 {
5503 /* Handle local symbol. */
5504 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5505
5506 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5507 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5508 }
5509
5510 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5511 rel->r_addend,
5512 lsect);
5513 BFD_ASSERT (linker_section_ptr != NULL);
5514
5515 /* Offset will always be a multiple of four, so use the bottom bit
5516 as a "written" flag. */
5517 if ((linker_section_ptr->offset & 1) == 0)
5518 {
5519 bfd_put_32 (lsect->section->owner,
5520 relocation + linker_section_ptr->addend,
5521 lsect->section->contents + linker_section_ptr->offset);
5522 linker_section_ptr->offset += 1;
5523 }
5524
5525 relocation = (lsect->section->output_offset
5526 + linker_section_ptr->offset - 1
5527 - 0x8000);
5528
5529 #ifdef DEBUG
5530 fprintf (stderr,
5531 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5532 lsect->name, (long) relocation, (long) relocation);
5533 #endif
5534
5535 /* Subtract out the addend, because it will get added back in by the normal
5536 processing. */
5537 return relocation - linker_section_ptr->addend;
5538 }
5539
5540 /* The RELOCATE_SECTION function is called by the ELF backend linker
5541 to handle the relocations for a section.
5542
5543 The relocs are always passed as Rela structures; if the section
5544 actually uses Rel structures, the r_addend field will always be
5545 zero.
5546
5547 This function is responsible for adjust the section contents as
5548 necessary, and (if using Rela relocs and generating a
5549 relocatable output file) adjusting the reloc addend as
5550 necessary.
5551
5552 This function does not have to worry about setting the reloc
5553 address or the reloc symbol index.
5554
5555 LOCAL_SYMS is a pointer to the swapped in local symbols.
5556
5557 LOCAL_SECTIONS is an array giving the section in the input file
5558 corresponding to the st_shndx field of each local symbol.
5559
5560 The global hash table entry for the global symbols can be found
5561 via elf_sym_hashes (input_bfd).
5562
5563 When generating relocatable output, this function must handle
5564 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5565 going to be the section symbol corresponding to the output
5566 section, which means that the addend must be adjusted
5567 accordingly. */
5568
5569 static bfd_boolean
5570 ppc_elf_relocate_section (bfd *output_bfd,
5571 struct bfd_link_info *info,
5572 bfd *input_bfd,
5573 asection *input_section,
5574 bfd_byte *contents,
5575 Elf_Internal_Rela *relocs,
5576 Elf_Internal_Sym *local_syms,
5577 asection **local_sections)
5578 {
5579 Elf_Internal_Shdr *symtab_hdr;
5580 struct elf_link_hash_entry **sym_hashes;
5581 struct ppc_elf_link_hash_table *htab;
5582 Elf_Internal_Rela *rel;
5583 Elf_Internal_Rela *relend;
5584 Elf_Internal_Rela outrel;
5585 bfd_byte *loc;
5586 asection *got2, *sreloc = NULL;
5587 bfd_vma *local_got_offsets;
5588 bfd_boolean ret = TRUE;
5589 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5590
5591 #ifdef DEBUG
5592 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5593 "%ld relocations%s",
5594 input_bfd, input_section,
5595 (long) input_section->reloc_count,
5596 (info->relocatable) ? " (relocatable)" : "");
5597 #endif
5598
5599 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5600
5601 /* Initialize howto table if not already done. */
5602 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5603 ppc_elf_howto_init ();
5604
5605 htab = ppc_elf_hash_table (info);
5606 local_got_offsets = elf_local_got_offsets (input_bfd);
5607 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5608 sym_hashes = elf_sym_hashes (input_bfd);
5609 rel = relocs;
5610 relend = relocs + input_section->reloc_count;
5611 for (; rel < relend; rel++)
5612 {
5613 enum elf_ppc_reloc_type r_type;
5614 bfd_vma addend;
5615 bfd_reloc_status_type r;
5616 Elf_Internal_Sym *sym;
5617 asection *sec;
5618 struct elf_link_hash_entry *h;
5619 const char *sym_name;
5620 reloc_howto_type *howto;
5621 unsigned long r_symndx;
5622 bfd_vma relocation;
5623 bfd_vma branch_bit, insn, from;
5624 bfd_boolean unresolved_reloc;
5625 bfd_boolean warned;
5626 unsigned int tls_type, tls_mask, tls_gd;
5627
5628 r_type = ELF32_R_TYPE (rel->r_info);
5629 sym = NULL;
5630 sec = NULL;
5631 h = NULL;
5632 unresolved_reloc = FALSE;
5633 warned = FALSE;
5634 r_symndx = ELF32_R_SYM (rel->r_info);
5635
5636 if (r_symndx < symtab_hdr->sh_info)
5637 {
5638 sym = local_syms + r_symndx;
5639 sec = local_sections[r_symndx];
5640 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5641
5642 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5643 }
5644 else
5645 {
5646 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5647 r_symndx, symtab_hdr, sym_hashes,
5648 h, sec, relocation,
5649 unresolved_reloc, warned);
5650
5651 sym_name = h->root.root.string;
5652 }
5653
5654 if (sec != NULL && elf_discarded_section (sec))
5655 {
5656 /* For relocs against symbols from removed linkonce sections,
5657 or sections discarded by a linker script, we just want the
5658 section contents zeroed. Avoid any special processing. */
5659 howto = NULL;
5660 if (r_type < R_PPC_max)
5661 howto = ppc_elf_howto_table[r_type];
5662 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5663 rel->r_info = 0;
5664 rel->r_addend = 0;
5665 continue;
5666 }
5667
5668 if (info->relocatable)
5669 {
5670 if (got2 != NULL
5671 && r_type == R_PPC_PLTREL24
5672 && rel->r_addend >= 32768)
5673 {
5674 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5675 addend specifies the GOT pointer offset within .got2. */
5676 rel->r_addend += got2->output_offset;
5677 }
5678 continue;
5679 }
5680
5681 /* TLS optimizations. Replace instruction sequences and relocs
5682 based on information we collected in tls_optimize. We edit
5683 RELOCS so that --emit-relocs will output something sensible
5684 for the final instruction stream. */
5685 tls_mask = 0;
5686 tls_gd = 0;
5687 if (IS_PPC_TLS_RELOC (r_type))
5688 {
5689 if (h != NULL)
5690 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5691 else if (local_got_offsets != NULL)
5692 {
5693 char *lgot_masks;
5694 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5695 tls_mask = lgot_masks[r_symndx];
5696 }
5697 }
5698
5699 /* Ensure reloc mapping code below stays sane. */
5700 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5701 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5702 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5703 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5704 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5705 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5706 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5707 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5708 abort ();
5709 switch (r_type)
5710 {
5711 default:
5712 break;
5713
5714 case R_PPC_GOT_TPREL16:
5715 case R_PPC_GOT_TPREL16_LO:
5716 if (tls_mask != 0
5717 && (tls_mask & TLS_TPREL) == 0)
5718 {
5719 bfd_vma insn;
5720 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5721 insn &= 31 << 21;
5722 insn |= 0x3c020000; /* addis 0,2,0 */
5723 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5724 r_type = R_PPC_TPREL16_HA;
5725 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5726 }
5727 break;
5728
5729 case R_PPC_TLS:
5730 if (tls_mask != 0
5731 && (tls_mask & TLS_TPREL) == 0)
5732 {
5733 bfd_vma insn, rtra;
5734 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5735 if ((insn & ((31 << 26) | (31 << 11)))
5736 == ((31 << 26) | (2 << 11)))
5737 rtra = insn & ((1 << 26) - (1 << 16));
5738 else if ((insn & ((31 << 26) | (31 << 16)))
5739 == ((31 << 26) | (2 << 16)))
5740 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5741 else
5742 abort ();
5743 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5744 /* add -> addi. */
5745 insn = 14 << 26;
5746 else if ((insn & (31 << 1)) == 23 << 1
5747 && ((insn & (31 << 6)) < 14 << 6
5748 || ((insn & (31 << 6)) >= 16 << 6
5749 && (insn & (31 << 6)) < 24 << 6)))
5750 /* load and store indexed -> dform. */
5751 insn = (32 | ((insn >> 6) & 31)) << 26;
5752 else if ((insn & (31 << 1)) == 21 << 1
5753 && (insn & (0x1a << 6)) == 0)
5754 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5755 insn = (((58 | ((insn >> 6) & 4)) << 26)
5756 | ((insn >> 6) & 1));
5757 else if ((insn & (31 << 1)) == 21 << 1
5758 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5759 /* lwax -> lwa. */
5760 insn = (58 << 26) | 2;
5761 else
5762 abort ();
5763 insn |= rtra;
5764 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5765 r_type = R_PPC_TPREL16_LO;
5766 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5767
5768 /* Was PPC_TLS which sits on insn boundary, now
5769 PPC_TPREL16_LO which is at low-order half-word. */
5770 rel->r_offset += d_offset;
5771 }
5772 break;
5773
5774 case R_PPC_GOT_TLSGD16_HI:
5775 case R_PPC_GOT_TLSGD16_HA:
5776 tls_gd = TLS_TPRELGD;
5777 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5778 goto tls_gdld_hi;
5779 break;
5780
5781 case R_PPC_GOT_TLSLD16_HI:
5782 case R_PPC_GOT_TLSLD16_HA:
5783 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5784 {
5785 tls_gdld_hi:
5786 if ((tls_mask & tls_gd) != 0)
5787 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5788 + R_PPC_GOT_TPREL16);
5789 else
5790 {
5791 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5792 rel->r_offset -= d_offset;
5793 r_type = R_PPC_NONE;
5794 }
5795 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5796 }
5797 break;
5798
5799 case R_PPC_GOT_TLSGD16:
5800 case R_PPC_GOT_TLSGD16_LO:
5801 tls_gd = TLS_TPRELGD;
5802 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5803 goto tls_get_addr_check;
5804 break;
5805
5806 case R_PPC_GOT_TLSLD16:
5807 case R_PPC_GOT_TLSLD16_LO:
5808 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5809 {
5810 tls_get_addr_check:
5811 if (rel + 1 < relend)
5812 {
5813 enum elf_ppc_reloc_type r_type2;
5814 unsigned long r_symndx2;
5815 struct elf_link_hash_entry *h2;
5816 bfd_vma insn1, insn2;
5817 bfd_vma offset;
5818
5819 /* The next instruction should be a call to
5820 __tls_get_addr. Peek at the reloc to be sure. */
5821 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5822 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5823 if (r_symndx2 < symtab_hdr->sh_info
5824 || (r_type2 != R_PPC_REL14
5825 && r_type2 != R_PPC_REL14_BRTAKEN
5826 && r_type2 != R_PPC_REL14_BRNTAKEN
5827 && r_type2 != R_PPC_REL24
5828 && r_type2 != R_PPC_PLTREL24))
5829 break;
5830
5831 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5832 while (h2->root.type == bfd_link_hash_indirect
5833 || h2->root.type == bfd_link_hash_warning)
5834 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5835 if (h2 == NULL || h2 != htab->tls_get_addr)
5836 break;
5837
5838 /* OK, it checks out. Replace the call. */
5839 offset = rel[1].r_offset;
5840 insn1 = bfd_get_32 (output_bfd,
5841 contents + rel->r_offset - d_offset);
5842 if ((tls_mask & tls_gd) != 0)
5843 {
5844 /* IE */
5845 insn1 &= (1 << 26) - 1;
5846 insn1 |= 32 << 26; /* lwz */
5847 insn2 = 0x7c631214; /* add 3,3,2 */
5848 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5849 rel[1].r_addend = 0;
5850 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5851 + R_PPC_GOT_TPREL16);
5852 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5853 }
5854 else
5855 {
5856 /* LE */
5857 insn1 = 0x3c620000; /* addis 3,2,0 */
5858 insn2 = 0x38630000; /* addi 3,3,0 */
5859 if (tls_gd == 0)
5860 {
5861 /* Was an LD reloc. */
5862 r_symndx = 0;
5863 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5864 }
5865 r_type = R_PPC_TPREL16_HA;
5866 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5867 rel[1].r_info = ELF32_R_INFO (r_symndx,
5868 R_PPC_TPREL16_LO);
5869 rel[1].r_offset += d_offset;
5870 rel[1].r_addend = rel->r_addend;
5871 }
5872 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
5873 bfd_put_32 (output_bfd, insn2, contents + offset);
5874 if (tls_gd == 0)
5875 {
5876 /* We changed the symbol on an LD reloc. Start over
5877 in order to get h, sym, sec etc. right. */
5878 rel--;
5879 continue;
5880 }
5881 }
5882 }
5883 break;
5884 }
5885
5886 /* Handle other relocations that tweak non-addend part of insn. */
5887 branch_bit = 0;
5888 switch (r_type)
5889 {
5890 default:
5891 break;
5892
5893 /* Branch taken prediction relocations. */
5894 case R_PPC_ADDR14_BRTAKEN:
5895 case R_PPC_REL14_BRTAKEN:
5896 branch_bit = BRANCH_PREDICT_BIT;
5897 /* Fall thru */
5898
5899 /* Branch not taken prediction relocations. */
5900 case R_PPC_ADDR14_BRNTAKEN:
5901 case R_PPC_REL14_BRNTAKEN:
5902 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5903 insn &= ~BRANCH_PREDICT_BIT;
5904 insn |= branch_bit;
5905
5906 from = (rel->r_offset
5907 + input_section->output_offset
5908 + input_section->output_section->vma);
5909
5910 /* Invert 'y' bit if not the default. */
5911 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5912 insn ^= BRANCH_PREDICT_BIT;
5913
5914 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5915 break;
5916 }
5917
5918 addend = rel->r_addend;
5919 tls_type = 0;
5920 howto = NULL;
5921 if (r_type < R_PPC_max)
5922 howto = ppc_elf_howto_table[r_type];
5923 switch (r_type)
5924 {
5925 default:
5926 (*_bfd_error_handler)
5927 (_("%B: unknown relocation type %d for symbol %s"),
5928 input_bfd, (int) r_type, sym_name);
5929
5930 bfd_set_error (bfd_error_bad_value);
5931 ret = FALSE;
5932 continue;
5933
5934 case R_PPC_NONE:
5935 case R_PPC_TLS:
5936 case R_PPC_EMB_MRKREF:
5937 case R_PPC_GNU_VTINHERIT:
5938 case R_PPC_GNU_VTENTRY:
5939 continue;
5940
5941 /* GOT16 relocations. Like an ADDR16 using the symbol's
5942 address in the GOT as relocation value instead of the
5943 symbol's value itself. Also, create a GOT entry for the
5944 symbol and put the symbol value there. */
5945 case R_PPC_GOT_TLSGD16:
5946 case R_PPC_GOT_TLSGD16_LO:
5947 case R_PPC_GOT_TLSGD16_HI:
5948 case R_PPC_GOT_TLSGD16_HA:
5949 tls_type = TLS_TLS | TLS_GD;
5950 goto dogot;
5951
5952 case R_PPC_GOT_TLSLD16:
5953 case R_PPC_GOT_TLSLD16_LO:
5954 case R_PPC_GOT_TLSLD16_HI:
5955 case R_PPC_GOT_TLSLD16_HA:
5956 tls_type = TLS_TLS | TLS_LD;
5957 goto dogot;
5958
5959 case R_PPC_GOT_TPREL16:
5960 case R_PPC_GOT_TPREL16_LO:
5961 case R_PPC_GOT_TPREL16_HI:
5962 case R_PPC_GOT_TPREL16_HA:
5963 tls_type = TLS_TLS | TLS_TPREL;
5964 goto dogot;
5965
5966 case R_PPC_GOT_DTPREL16:
5967 case R_PPC_GOT_DTPREL16_LO:
5968 case R_PPC_GOT_DTPREL16_HI:
5969 case R_PPC_GOT_DTPREL16_HA:
5970 tls_type = TLS_TLS | TLS_DTPREL;
5971 goto dogot;
5972
5973 case R_PPC_GOT16:
5974 case R_PPC_GOT16_LO:
5975 case R_PPC_GOT16_HI:
5976 case R_PPC_GOT16_HA:
5977 dogot:
5978 {
5979 /* Relocation is to the entry for this symbol in the global
5980 offset table. */
5981 bfd_vma off;
5982 bfd_vma *offp;
5983 unsigned long indx;
5984
5985 if (htab->got == NULL)
5986 abort ();
5987
5988 indx = 0;
5989 if (tls_type == (TLS_TLS | TLS_LD)
5990 && (h == NULL
5991 || !h->def_dynamic))
5992 offp = &htab->tlsld_got.offset;
5993 else if (h != NULL)
5994 {
5995 bfd_boolean dyn;
5996 dyn = htab->elf.dynamic_sections_created;
5997 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5998 || (info->shared
5999 && SYMBOL_REFERENCES_LOCAL (info, h)))
6000 /* This is actually a static link, or it is a
6001 -Bsymbolic link and the symbol is defined
6002 locally, or the symbol was forced to be local
6003 because of a version file. */
6004 ;
6005 else
6006 {
6007 indx = h->dynindx;
6008 unresolved_reloc = FALSE;
6009 }
6010 offp = &h->got.offset;
6011 }
6012 else
6013 {
6014 if (local_got_offsets == NULL)
6015 abort ();
6016 offp = &local_got_offsets[r_symndx];
6017 }
6018
6019 /* The offset must always be a multiple of 4. We use the
6020 least significant bit to record whether we have already
6021 processed this entry. */
6022 off = *offp;
6023 if ((off & 1) != 0)
6024 off &= ~1;
6025 else
6026 {
6027 unsigned int tls_m = (tls_mask
6028 & (TLS_LD | TLS_GD | TLS_DTPREL
6029 | TLS_TPREL | TLS_TPRELGD));
6030
6031 if (offp == &htab->tlsld_got.offset)
6032 tls_m = TLS_LD;
6033 else if (h == NULL
6034 || !h->def_dynamic)
6035 tls_m &= ~TLS_LD;
6036
6037 /* We might have multiple got entries for this sym.
6038 Initialize them all. */
6039 do
6040 {
6041 int tls_ty = 0;
6042
6043 if ((tls_m & TLS_LD) != 0)
6044 {
6045 tls_ty = TLS_TLS | TLS_LD;
6046 tls_m &= ~TLS_LD;
6047 }
6048 else if ((tls_m & TLS_GD) != 0)
6049 {
6050 tls_ty = TLS_TLS | TLS_GD;
6051 tls_m &= ~TLS_GD;
6052 }
6053 else if ((tls_m & TLS_DTPREL) != 0)
6054 {
6055 tls_ty = TLS_TLS | TLS_DTPREL;
6056 tls_m &= ~TLS_DTPREL;
6057 }
6058 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6059 {
6060 tls_ty = TLS_TLS | TLS_TPREL;
6061 tls_m = 0;
6062 }
6063
6064 /* Generate relocs for the dynamic linker. */
6065 if ((info->shared || indx != 0)
6066 && (h == NULL
6067 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6068 || h->root.type != bfd_link_hash_undefweak))
6069 {
6070 outrel.r_offset = (htab->got->output_section->vma
6071 + htab->got->output_offset
6072 + off);
6073 outrel.r_addend = 0;
6074 if (tls_ty & (TLS_LD | TLS_GD))
6075 {
6076 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6077 if (tls_ty == (TLS_TLS | TLS_GD))
6078 {
6079 loc = htab->relgot->contents;
6080 loc += (htab->relgot->reloc_count++
6081 * sizeof (Elf32_External_Rela));
6082 bfd_elf32_swap_reloca_out (output_bfd,
6083 &outrel, loc);
6084 outrel.r_offset += 4;
6085 outrel.r_info
6086 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6087 }
6088 }
6089 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6090 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6091 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6092 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6093 else if (indx == 0)
6094 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6095 else
6096 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6097 if (indx == 0)
6098 {
6099 outrel.r_addend += relocation;
6100 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6101 outrel.r_addend -= htab->elf.tls_sec->vma;
6102 }
6103 loc = htab->relgot->contents;
6104 loc += (htab->relgot->reloc_count++
6105 * sizeof (Elf32_External_Rela));
6106 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6107 }
6108
6109 /* Init the .got section contents if we're not
6110 emitting a reloc. */
6111 else
6112 {
6113 bfd_vma value = relocation;
6114
6115 if (tls_ty == (TLS_TLS | TLS_LD))
6116 value = 1;
6117 else if (tls_ty != 0)
6118 {
6119 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6120 if (tls_ty == (TLS_TLS | TLS_TPREL))
6121 value += DTP_OFFSET - TP_OFFSET;
6122
6123 if (tls_ty == (TLS_TLS | TLS_GD))
6124 {
6125 bfd_put_32 (output_bfd, value,
6126 htab->got->contents + off + 4);
6127 value = 1;
6128 }
6129 }
6130 bfd_put_32 (output_bfd, value,
6131 htab->got->contents + off);
6132 }
6133
6134 off += 4;
6135 if (tls_ty & (TLS_LD | TLS_GD))
6136 off += 4;
6137 }
6138 while (tls_m != 0);
6139
6140 off = *offp;
6141 *offp = off | 1;
6142 }
6143
6144 if (off >= (bfd_vma) -2)
6145 abort ();
6146
6147 if ((tls_type & TLS_TLS) != 0)
6148 {
6149 if (tls_type != (TLS_TLS | TLS_LD))
6150 {
6151 if ((tls_mask & TLS_LD) != 0
6152 && !(h == NULL
6153 || !h->def_dynamic))
6154 off += 8;
6155 if (tls_type != (TLS_TLS | TLS_GD))
6156 {
6157 if ((tls_mask & TLS_GD) != 0)
6158 off += 8;
6159 if (tls_type != (TLS_TLS | TLS_DTPREL))
6160 {
6161 if ((tls_mask & TLS_DTPREL) != 0)
6162 off += 4;
6163 }
6164 }
6165 }
6166 }
6167
6168 relocation = htab->got->output_offset + off;
6169 relocation -= htab->elf.hgot->root.u.def.value;
6170
6171 /* Addends on got relocations don't make much sense.
6172 x+off@got is actually x@got+off, and since the got is
6173 generated by a hash table traversal, the value in the
6174 got at entry m+n bears little relation to the entry m. */
6175 if (addend != 0)
6176 (*_bfd_error_handler)
6177 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6178 input_bfd,
6179 input_section,
6180 (long) rel->r_offset,
6181 howto->name,
6182 sym_name);
6183 }
6184 break;
6185
6186 /* Relocations that need no special processing. */
6187 case R_PPC_LOCAL24PC:
6188 /* It makes no sense to point a local relocation
6189 at a symbol not in this object. */
6190 if (unresolved_reloc)
6191 {
6192 if (! (*info->callbacks->undefined_symbol) (info,
6193 h->root.root.string,
6194 input_bfd,
6195 input_section,
6196 rel->r_offset,
6197 TRUE))
6198 return FALSE;
6199 continue;
6200 }
6201 break;
6202
6203 case R_PPC_DTPREL16:
6204 case R_PPC_DTPREL16_LO:
6205 case R_PPC_DTPREL16_HI:
6206 case R_PPC_DTPREL16_HA:
6207 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6208 break;
6209
6210 /* Relocations that may need to be propagated if this is a shared
6211 object. */
6212 case R_PPC_TPREL16:
6213 case R_PPC_TPREL16_LO:
6214 case R_PPC_TPREL16_HI:
6215 case R_PPC_TPREL16_HA:
6216 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6217 /* The TPREL16 relocs shouldn't really be used in shared
6218 libs as they will result in DT_TEXTREL being set, but
6219 support them anyway. */
6220 goto dodyn;
6221
6222 case R_PPC_TPREL32:
6223 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6224 goto dodyn;
6225
6226 case R_PPC_DTPREL32:
6227 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6228 goto dodyn;
6229
6230 case R_PPC_DTPMOD32:
6231 relocation = 1;
6232 addend = 0;
6233 goto dodyn;
6234
6235 case R_PPC_REL16:
6236 case R_PPC_REL16_LO:
6237 case R_PPC_REL16_HI:
6238 case R_PPC_REL16_HA:
6239 break;
6240
6241 case R_PPC_REL24:
6242 case R_PPC_REL32:
6243 case R_PPC_REL14:
6244 case R_PPC_REL14_BRTAKEN:
6245 case R_PPC_REL14_BRNTAKEN:
6246 /* If these relocations are not to a named symbol, they can be
6247 handled right here, no need to bother the dynamic linker. */
6248 if (SYMBOL_REFERENCES_LOCAL (info, h)
6249 || h == htab->elf.hgot)
6250 break;
6251 /* fall through */
6252
6253 /* Relocations that always need to be propagated if this is a shared
6254 object. */
6255 case R_PPC_ADDR32:
6256 case R_PPC_ADDR24:
6257 case R_PPC_ADDR16:
6258 case R_PPC_ADDR16_LO:
6259 case R_PPC_ADDR16_HI:
6260 case R_PPC_ADDR16_HA:
6261 case R_PPC_ADDR14:
6262 case R_PPC_ADDR14_BRTAKEN:
6263 case R_PPC_ADDR14_BRNTAKEN:
6264 case R_PPC_UADDR32:
6265 case R_PPC_UADDR16:
6266 dodyn:
6267 if ((input_section->flags & SEC_ALLOC) == 0)
6268 break;
6269 /* Fall thru. */
6270
6271 if ((info->shared
6272 && (h == NULL
6273 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6274 || h->root.type != bfd_link_hash_undefweak)
6275 && (MUST_BE_DYN_RELOC (r_type)
6276 || !SYMBOL_CALLS_LOCAL (info, h)))
6277 || (ELIMINATE_COPY_RELOCS
6278 && !info->shared
6279 && h != NULL
6280 && h->dynindx != -1
6281 && !h->non_got_ref
6282 && h->def_dynamic
6283 && !h->def_regular))
6284 {
6285 int skip;
6286
6287 #ifdef DEBUG
6288 fprintf (stderr, "ppc_elf_relocate_section needs to "
6289 "create relocation for %s\n",
6290 (h && h->root.root.string
6291 ? h->root.root.string : "<unknown>"));
6292 #endif
6293
6294 /* When generating a shared object, these relocations
6295 are copied into the output file to be resolved at run
6296 time. */
6297 if (sreloc == NULL)
6298 {
6299 const char *name;
6300
6301 name = (bfd_elf_string_from_elf_section
6302 (input_bfd,
6303 elf_elfheader (input_bfd)->e_shstrndx,
6304 elf_section_data (input_section)->rel_hdr.sh_name));
6305 if (name == NULL)
6306 return FALSE;
6307
6308 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6309 && strcmp (bfd_get_section_name (input_bfd,
6310 input_section),
6311 name + 5) == 0);
6312
6313 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6314 BFD_ASSERT (sreloc != NULL);
6315 }
6316
6317 skip = 0;
6318
6319 outrel.r_offset =
6320 _bfd_elf_section_offset (output_bfd, info, input_section,
6321 rel->r_offset);
6322 if (outrel.r_offset == (bfd_vma) -1
6323 || outrel.r_offset == (bfd_vma) -2)
6324 skip = (int) outrel.r_offset;
6325 outrel.r_offset += (input_section->output_section->vma
6326 + input_section->output_offset);
6327
6328 if (skip)
6329 memset (&outrel, 0, sizeof outrel);
6330 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6331 {
6332 unresolved_reloc = FALSE;
6333 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6334 outrel.r_addend = rel->r_addend;
6335 }
6336 else
6337 {
6338 outrel.r_addend = relocation + rel->r_addend;
6339
6340 if (r_type == R_PPC_ADDR32)
6341 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6342 else
6343 {
6344 long indx;
6345
6346 if (bfd_is_abs_section (sec))
6347 indx = 0;
6348 else if (sec == NULL || sec->owner == NULL)
6349 {
6350 bfd_set_error (bfd_error_bad_value);
6351 return FALSE;
6352 }
6353 else
6354 {
6355 asection *osec;
6356
6357 /* We are turning this relocation into one
6358 against a section symbol. It would be
6359 proper to subtract the symbol's value,
6360 osec->vma, from the emitted reloc addend,
6361 but ld.so expects buggy relocs. */
6362 osec = sec->output_section;
6363 indx = elf_section_data (osec)->dynindx;
6364 if (indx == 0)
6365 {
6366 osec = htab->elf.text_index_section;
6367 indx = elf_section_data (osec)->dynindx;
6368 }
6369 BFD_ASSERT (indx != 0);
6370 #ifdef DEBUG
6371 if (indx == 0)
6372 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6373 indx, osec->name, osec->flags,
6374 h->root.root.string);
6375 #endif
6376 }
6377
6378 outrel.r_info = ELF32_R_INFO (indx, r_type);
6379 }
6380 }
6381
6382 loc = sreloc->contents;
6383 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6384 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6385
6386 if (skip == -1)
6387 continue;
6388
6389 /* This reloc will be computed at runtime. We clear the memory
6390 so that it contains predictable value. */
6391 if (! skip
6392 && ((input_section->flags & SEC_ALLOC) != 0
6393 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6394 {
6395 relocation = howto->pc_relative ? outrel.r_offset : 0;
6396 addend = 0;
6397 break;
6398 }
6399 }
6400 break;
6401
6402 case R_PPC_RELAX32PC_PLT:
6403 case R_PPC_RELAX32_PLT:
6404 {
6405 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6406
6407 if (htab->plt_type == PLT_NEW)
6408 relocation = (htab->glink->output_section->vma
6409 + htab->glink->output_offset
6410 + ent->glink_offset);
6411 else
6412 relocation = (htab->plt->output_section->vma
6413 + htab->plt->output_offset
6414 + ent->plt.offset);
6415 addend = 0;
6416 }
6417 if (r_type == R_PPC_RELAX32_PLT)
6418 goto relax32;
6419 /* Fall thru */
6420
6421 case R_PPC_RELAX32PC:
6422 relocation -= (input_section->output_section->vma
6423 + input_section->output_offset
6424 + rel->r_offset - 4);
6425 /* Fall thru */
6426
6427 case R_PPC_RELAX32:
6428 relax32:
6429 {
6430 unsigned long t0;
6431 unsigned long t1;
6432
6433 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6434 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6435
6436 /* We're clearing the bits for R_PPC_ADDR16_HA
6437 and R_PPC_ADDR16_LO here. */
6438 t0 &= ~0xffff;
6439 t1 &= ~0xffff;
6440
6441 /* t0 is HA, t1 is LO */
6442 relocation += addend;
6443 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6444 t1 |= relocation & 0xffff;
6445
6446 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6447 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6448 }
6449 continue;
6450
6451 /* Indirect .sdata relocation. */
6452 case R_PPC_EMB_SDAI16:
6453 BFD_ASSERT (htab->sdata[0].section != NULL);
6454 relocation
6455 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6456 h, relocation, rel);
6457 break;
6458
6459 /* Indirect .sdata2 relocation. */
6460 case R_PPC_EMB_SDA2I16:
6461 BFD_ASSERT (htab->sdata[1].section != NULL);
6462 relocation
6463 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6464 h, relocation, rel);
6465 break;
6466
6467 /* Handle the TOC16 reloc. We want to use the offset within the .got
6468 section, not the actual VMA. This is appropriate when generating
6469 an embedded ELF object, for which the .got section acts like the
6470 AIX .toc section. */
6471 case R_PPC_TOC16: /* phony GOT16 relocations */
6472 BFD_ASSERT (sec != NULL);
6473 BFD_ASSERT (bfd_is_und_section (sec)
6474 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6475 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6476
6477 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6478 break;
6479
6480 case R_PPC_PLTREL24:
6481 /* Relocation is to the entry for this symbol in the
6482 procedure linkage table. */
6483 {
6484 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6485
6486 addend = 0;
6487 if (ent == NULL
6488 || htab->plt == NULL)
6489 {
6490 /* We didn't make a PLT entry for this symbol. This
6491 happens when statically linking PIC code, or when
6492 using -Bsymbolic. */
6493 break;
6494 }
6495
6496 unresolved_reloc = FALSE;
6497 if (htab->plt_type == PLT_NEW)
6498 relocation = (htab->glink->output_section->vma
6499 + htab->glink->output_offset
6500 + ent->glink_offset);
6501 else
6502 relocation = (htab->plt->output_section->vma
6503 + htab->plt->output_offset
6504 + ent->plt.offset);
6505 }
6506 break;
6507
6508 /* Relocate against _SDA_BASE_. */
6509 case R_PPC_SDAREL16:
6510 {
6511 const char *name;
6512 struct elf_link_hash_entry *sh;
6513
6514 BFD_ASSERT (sec != NULL);
6515 name = bfd_get_section_name (abfd, sec->output_section);
6516 if (! ((CONST_STRNEQ (name, ".sdata")
6517 && (name[6] == 0 || name[6] == '.'))
6518 || (CONST_STRNEQ (name, ".sbss")
6519 && (name[5] == 0 || name[5] == '.'))))
6520 {
6521 (*_bfd_error_handler)
6522 (_("%B: the target (%s) of a %s relocation is "
6523 "in the wrong output section (%s)"),
6524 input_bfd,
6525 sym_name,
6526 howto->name,
6527 name);
6528 }
6529 sh = htab->sdata[0].sym;
6530 addend -= (sh->root.u.def.value
6531 + sh->root.u.def.section->output_offset
6532 + sh->root.u.def.section->output_section->vma);
6533 }
6534 break;
6535
6536 /* Relocate against _SDA2_BASE_. */
6537 case R_PPC_EMB_SDA2REL:
6538 {
6539 const char *name;
6540 struct elf_link_hash_entry *sh;
6541
6542 BFD_ASSERT (sec != NULL);
6543 name = bfd_get_section_name (abfd, sec->output_section);
6544 if (! (CONST_STRNEQ (name, ".sdata2")
6545 || CONST_STRNEQ (name, ".sbss2")))
6546 {
6547 (*_bfd_error_handler)
6548 (_("%B: the target (%s) of a %s relocation is "
6549 "in the wrong output section (%s)"),
6550 input_bfd,
6551 sym_name,
6552 howto->name,
6553 name);
6554
6555 bfd_set_error (bfd_error_bad_value);
6556 ret = FALSE;
6557 continue;
6558 }
6559 sh = htab->sdata[1].sym;
6560 addend -= (sh->root.u.def.value
6561 + sh->root.u.def.section->output_offset
6562 + sh->root.u.def.section->output_section->vma);
6563 }
6564 break;
6565
6566 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6567 case R_PPC_EMB_SDA21:
6568 case R_PPC_EMB_RELSDA:
6569 {
6570 const char *name;
6571 int reg;
6572 struct elf_link_hash_entry *sh;
6573
6574 BFD_ASSERT (sec != NULL);
6575 name = bfd_get_section_name (abfd, sec->output_section);
6576 if (((CONST_STRNEQ (name, ".sdata")
6577 && (name[6] == 0 || name[6] == '.'))
6578 || (CONST_STRNEQ (name, ".sbss")
6579 && (name[5] == 0 || name[5] == '.'))))
6580 {
6581 reg = 13;
6582 sh = htab->sdata[0].sym;
6583 addend -= (sh->root.u.def.value
6584 + sh->root.u.def.section->output_offset
6585 + sh->root.u.def.section->output_section->vma);
6586 }
6587
6588 else if (CONST_STRNEQ (name, ".sdata2")
6589 || CONST_STRNEQ (name, ".sbss2"))
6590 {
6591 reg = 2;
6592 sh = htab->sdata[1].sym;
6593 addend -= (sh->root.u.def.value
6594 + sh->root.u.def.section->output_offset
6595 + sh->root.u.def.section->output_section->vma);
6596 }
6597
6598 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6599 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6600 {
6601 reg = 0;
6602 }
6603
6604 else
6605 {
6606 (*_bfd_error_handler)
6607 (_("%B: the target (%s) of a %s relocation is "
6608 "in the wrong output section (%s)"),
6609 input_bfd,
6610 sym_name,
6611 howto->name,
6612 name);
6613
6614 bfd_set_error (bfd_error_bad_value);
6615 ret = FALSE;
6616 continue;
6617 }
6618
6619 if (r_type == R_PPC_EMB_SDA21)
6620 { /* fill in register field */
6621 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6622 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6623 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6624 }
6625 }
6626 break;
6627
6628 /* Relocate against the beginning of the section. */
6629 case R_PPC_SECTOFF:
6630 case R_PPC_SECTOFF_LO:
6631 case R_PPC_SECTOFF_HI:
6632 case R_PPC_SECTOFF_HA:
6633 BFD_ASSERT (sec != NULL);
6634 addend -= sec->output_section->vma;
6635 break;
6636
6637 /* Negative relocations. */
6638 case R_PPC_EMB_NADDR32:
6639 case R_PPC_EMB_NADDR16:
6640 case R_PPC_EMB_NADDR16_LO:
6641 case R_PPC_EMB_NADDR16_HI:
6642 case R_PPC_EMB_NADDR16_HA:
6643 addend -= 2 * relocation;
6644 break;
6645
6646 case R_PPC_COPY:
6647 case R_PPC_GLOB_DAT:
6648 case R_PPC_JMP_SLOT:
6649 case R_PPC_RELATIVE:
6650 case R_PPC_PLT32:
6651 case R_PPC_PLTREL32:
6652 case R_PPC_PLT16_LO:
6653 case R_PPC_PLT16_HI:
6654 case R_PPC_PLT16_HA:
6655 case R_PPC_ADDR30:
6656 case R_PPC_EMB_RELSEC16:
6657 case R_PPC_EMB_RELST_LO:
6658 case R_PPC_EMB_RELST_HI:
6659 case R_PPC_EMB_RELST_HA:
6660 case R_PPC_EMB_BIT_FLD:
6661 (*_bfd_error_handler)
6662 (_("%B: relocation %s is not yet supported for symbol %s."),
6663 input_bfd,
6664 howto->name,
6665 sym_name);
6666
6667 bfd_set_error (bfd_error_invalid_operation);
6668 ret = FALSE;
6669 continue;
6670 }
6671
6672 /* Do any further special processing. */
6673 switch (r_type)
6674 {
6675 default:
6676 break;
6677
6678 case R_PPC_ADDR16_HA:
6679 case R_PPC_REL16_HA:
6680 case R_PPC_SECTOFF_HA:
6681 case R_PPC_TPREL16_HA:
6682 case R_PPC_DTPREL16_HA:
6683 case R_PPC_EMB_NADDR16_HA:
6684 case R_PPC_EMB_RELST_HA:
6685 /* It's just possible that this symbol is a weak symbol
6686 that's not actually defined anywhere. In that case,
6687 'sec' would be NULL, and we should leave the symbol
6688 alone (it will be set to zero elsewhere in the link). */
6689 if (sec == NULL)
6690 break;
6691 /* Fall thru */
6692
6693 case R_PPC_PLT16_HA:
6694 case R_PPC_GOT16_HA:
6695 case R_PPC_GOT_TLSGD16_HA:
6696 case R_PPC_GOT_TLSLD16_HA:
6697 case R_PPC_GOT_TPREL16_HA:
6698 case R_PPC_GOT_DTPREL16_HA:
6699 /* Add 0x10000 if sign bit in 0:15 is set.
6700 Bits 0:15 are not used. */
6701 addend += 0x8000;
6702 break;
6703 }
6704
6705 #ifdef DEBUG
6706 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6707 "offset = %ld, addend = %ld\n",
6708 howto->name,
6709 (int) r_type,
6710 sym_name,
6711 r_symndx,
6712 (long) rel->r_offset,
6713 (long) addend);
6714 #endif
6715
6716 if (unresolved_reloc
6717 && !((input_section->flags & SEC_DEBUGGING) != 0
6718 && h->def_dynamic))
6719 {
6720 (*_bfd_error_handler)
6721 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6722 input_bfd,
6723 input_section,
6724 (long) rel->r_offset,
6725 howto->name,
6726 sym_name);
6727 ret = FALSE;
6728 }
6729
6730 r = _bfd_final_link_relocate (howto,
6731 input_bfd,
6732 input_section,
6733 contents,
6734 rel->r_offset,
6735 relocation,
6736 addend);
6737
6738 if (r != bfd_reloc_ok)
6739 {
6740 if (r == bfd_reloc_overflow)
6741 {
6742 if (warned)
6743 continue;
6744 if (h != NULL
6745 && h->root.type == bfd_link_hash_undefweak
6746 && howto->pc_relative)
6747 {
6748 /* Assume this is a call protected by other code that
6749 detect the symbol is undefined. If this is the case,
6750 we can safely ignore the overflow. If not, the
6751 program is hosed anyway, and a little warning isn't
6752 going to help. */
6753
6754 continue;
6755 }
6756
6757 if (! (*info->callbacks->reloc_overflow) (info,
6758 (h ? &h->root : NULL),
6759 sym_name,
6760 howto->name,
6761 rel->r_addend,
6762 input_bfd,
6763 input_section,
6764 rel->r_offset))
6765 return FALSE;
6766 }
6767 else
6768 {
6769 (*_bfd_error_handler)
6770 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6771 input_bfd, input_section,
6772 (long) rel->r_offset, howto->name, sym_name, (int) r);
6773 ret = FALSE;
6774 }
6775 }
6776 }
6777
6778 #ifdef DEBUG
6779 fprintf (stderr, "\n");
6780 #endif
6781
6782 return ret;
6783 }
6784 \f
6785 #define PPC_LO(v) ((v) & 0xffff)
6786 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6787 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6788
6789 /* Finish up dynamic symbol handling. We set the contents of various
6790 dynamic sections here. */
6791
6792 static bfd_boolean
6793 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6794 struct bfd_link_info *info,
6795 struct elf_link_hash_entry *h,
6796 Elf_Internal_Sym *sym)
6797 {
6798 struct ppc_elf_link_hash_table *htab;
6799 struct plt_entry *ent;
6800 bfd_boolean doneone;
6801
6802 #ifdef DEBUG
6803 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6804 h->root.root.string);
6805 #endif
6806
6807 htab = ppc_elf_hash_table (info);
6808 BFD_ASSERT (htab->elf.dynobj != NULL);
6809
6810 doneone = FALSE;
6811 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6812 if (ent->plt.offset != (bfd_vma) -1)
6813 {
6814 if (!doneone)
6815 {
6816 Elf_Internal_Rela rela;
6817 bfd_byte *loc;
6818 bfd_vma reloc_index;
6819
6820 if (htab->plt_type == PLT_NEW)
6821 reloc_index = ent->plt.offset / 4;
6822 else
6823 {
6824 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6825 / htab->plt_slot_size);
6826 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6827 && htab->plt_type == PLT_OLD)
6828 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6829 }
6830
6831 /* This symbol has an entry in the procedure linkage table.
6832 Set it up. */
6833 if (htab->plt_type == PLT_VXWORKS)
6834 {
6835 bfd_vma got_offset;
6836 const bfd_vma *plt_entry;
6837
6838 /* The first three entries in .got.plt are reserved. */
6839 got_offset = (reloc_index + 3) * 4;
6840
6841 /* Use the right PLT. */
6842 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6843 : ppc_elf_vxworks_plt_entry;
6844
6845 /* Fill in the .plt on VxWorks. */
6846 if (info->shared)
6847 {
6848 bfd_vma got_offset_hi = (got_offset >> 16)
6849 + ((got_offset & 0x8000) >> 15);
6850
6851 bfd_put_32 (output_bfd,
6852 plt_entry[0] | (got_offset_hi & 0xffff),
6853 htab->plt->contents + ent->plt.offset + 0);
6854 bfd_put_32 (output_bfd,
6855 plt_entry[1] | (got_offset & 0xffff),
6856 htab->plt->contents + ent->plt.offset + 4);
6857 }
6858 else
6859 {
6860 bfd_vma got_loc
6861 = (got_offset
6862 + htab->elf.hgot->root.u.def.value
6863 + htab->elf.hgot->root.u.def.section->output_offset
6864 + htab->elf.hgot->root.u.def.section->output_section->vma);
6865 bfd_vma got_loc_hi = (got_loc >> 16)
6866 + ((got_loc & 0x8000) >> 15);
6867
6868 bfd_put_32 (output_bfd,
6869 plt_entry[0] | (got_loc_hi & 0xffff),
6870 htab->plt->contents + ent->plt.offset + 0);
6871 bfd_put_32 (output_bfd,
6872 plt_entry[1] | (got_loc & 0xffff),
6873 htab->plt->contents + ent->plt.offset + 4);
6874 }
6875
6876 bfd_put_32 (output_bfd, plt_entry[2],
6877 htab->plt->contents + ent->plt.offset + 8);
6878 bfd_put_32 (output_bfd, plt_entry[3],
6879 htab->plt->contents + ent->plt.offset + 12);
6880
6881 /* This instruction is an immediate load. The value loaded is
6882 the byte offset of the R_PPC_JMP_SLOT relocation from the
6883 start of the .rela.plt section. The value is stored in the
6884 low-order 16 bits of the load instruction. */
6885 /* NOTE: It appears that this is now an index rather than a
6886 prescaled offset. */
6887 bfd_put_32 (output_bfd,
6888 plt_entry[4] | reloc_index,
6889 htab->plt->contents + ent->plt.offset + 16);
6890 /* This instruction is a PC-relative branch whose target is
6891 the start of the PLT section. The address of this branch
6892 instruction is 20 bytes beyond the start of this PLT entry.
6893 The address is encoded in bits 6-29, inclusive. The value
6894 stored is right-shifted by two bits, permitting a 26-bit
6895 offset. */
6896 bfd_put_32 (output_bfd,
6897 (plt_entry[5]
6898 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6899 htab->plt->contents + ent->plt.offset + 20);
6900 bfd_put_32 (output_bfd, plt_entry[6],
6901 htab->plt->contents + ent->plt.offset + 24);
6902 bfd_put_32 (output_bfd, plt_entry[7],
6903 htab->plt->contents + ent->plt.offset + 28);
6904
6905 /* Fill in the GOT entry corresponding to this PLT slot with
6906 the address immediately after the the "bctr" instruction
6907 in this PLT entry. */
6908 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6909 + htab->plt->output_offset
6910 + ent->plt.offset + 16),
6911 htab->sgotplt->contents + got_offset);
6912
6913 if (!info->shared)
6914 {
6915 /* Fill in a couple of entries in .rela.plt.unloaded. */
6916 loc = htab->srelplt2->contents
6917 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6918 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6919 * sizeof (Elf32_External_Rela));
6920
6921 /* Provide the @ha relocation for the first instruction. */
6922 rela.r_offset = (htab->plt->output_section->vma
6923 + htab->plt->output_offset
6924 + ent->plt.offset + 2);
6925 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6926 R_PPC_ADDR16_HA);
6927 rela.r_addend = got_offset;
6928 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6929 loc += sizeof (Elf32_External_Rela);
6930
6931 /* Provide the @l relocation for the second instruction. */
6932 rela.r_offset = (htab->plt->output_section->vma
6933 + htab->plt->output_offset
6934 + ent->plt.offset + 6);
6935 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6936 R_PPC_ADDR16_LO);
6937 rela.r_addend = got_offset;
6938 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6939 loc += sizeof (Elf32_External_Rela);
6940
6941 /* Provide a relocation for the GOT entry corresponding to this
6942 PLT slot. Point it at the middle of the .plt entry. */
6943 rela.r_offset = (htab->sgotplt->output_section->vma
6944 + htab->sgotplt->output_offset
6945 + got_offset);
6946 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6947 R_PPC_ADDR32);
6948 rela.r_addend = ent->plt.offset + 16;
6949 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6950 }
6951
6952 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6953 In particular, the offset for the relocation is not the
6954 address of the PLT entry for this function, as specified
6955 by the ABI. Instead, the offset is set to the address of
6956 the GOT slot for this function. See EABI 4.4.4.1. */
6957 rela.r_offset = (htab->sgotplt->output_section->vma
6958 + htab->sgotplt->output_offset
6959 + got_offset);
6960
6961 }
6962 else
6963 {
6964 rela.r_offset = (htab->plt->output_section->vma
6965 + htab->plt->output_offset
6966 + ent->plt.offset);
6967 if (htab->plt_type == PLT_OLD)
6968 {
6969 /* We don't need to fill in the .plt. The ppc dynamic
6970 linker will fill it in. */
6971 }
6972 else
6973 {
6974 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6975 + htab->glink->output_section->vma
6976 + htab->glink->output_offset);
6977 bfd_put_32 (output_bfd, val,
6978 htab->plt->contents + ent->plt.offset);
6979 }
6980 }
6981
6982 /* Fill in the entry in the .rela.plt section. */
6983 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6984 rela.r_addend = 0;
6985
6986 loc = (htab->relplt->contents
6987 + reloc_index * sizeof (Elf32_External_Rela));
6988 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6989
6990 if (!h->def_regular)
6991 {
6992 /* Mark the symbol as undefined, rather than as defined in
6993 the .plt section. Leave the value alone. */
6994 sym->st_shndx = SHN_UNDEF;
6995 /* If the symbol is weak, we do need to clear the value.
6996 Otherwise, the PLT entry would provide a definition for
6997 the symbol even if the symbol wasn't defined anywhere,
6998 and so the symbol would never be NULL. */
6999 if (!h->ref_regular_nonweak)
7000 sym->st_value = 0;
7001 }
7002 doneone = TRUE;
7003 }
7004
7005 if (htab->plt_type == PLT_NEW)
7006 {
7007 bfd_vma plt;
7008 unsigned char *p;
7009
7010 plt = (ent->plt.offset
7011 + htab->plt->output_section->vma
7012 + htab->plt->output_offset);
7013 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7014
7015 if (info->shared || info->pie)
7016 {
7017 bfd_vma got = 0;
7018
7019 if (ent->addend >= 32768)
7020 got = (ent->addend
7021 + ent->sec->output_section->vma
7022 + ent->sec->output_offset);
7023 else if (htab->elf.hgot != NULL)
7024 got = (htab->elf.hgot->root.u.def.value
7025 + htab->elf.hgot->root.u.def.section->output_section->vma
7026 + htab->elf.hgot->root.u.def.section->output_offset);
7027
7028 plt -= got;
7029
7030 if (plt + 0x8000 < 0x10000)
7031 {
7032 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7033 p += 4;
7034 bfd_put_32 (output_bfd, MTCTR_11, p);
7035 p += 4;
7036 bfd_put_32 (output_bfd, BCTR, p);
7037 p += 4;
7038 bfd_put_32 (output_bfd, NOP, p);
7039 p += 4;
7040 }
7041 else
7042 {
7043 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7044 p += 4;
7045 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7046 p += 4;
7047 bfd_put_32 (output_bfd, MTCTR_11, p);
7048 p += 4;
7049 bfd_put_32 (output_bfd, BCTR, p);
7050 p += 4;
7051 }
7052 }
7053 else
7054 {
7055 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7056 p += 4;
7057 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7058 p += 4;
7059 bfd_put_32 (output_bfd, MTCTR_11, p);
7060 p += 4;
7061 bfd_put_32 (output_bfd, BCTR, p);
7062 p += 4;
7063
7064 /* We only need one non-PIC glink stub. */
7065 break;
7066 }
7067 }
7068 else
7069 break;
7070 }
7071
7072 if (h->needs_copy)
7073 {
7074 asection *s;
7075 Elf_Internal_Rela rela;
7076 bfd_byte *loc;
7077
7078 /* This symbols needs a copy reloc. Set it up. */
7079
7080 #ifdef DEBUG
7081 fprintf (stderr, ", copy");
7082 #endif
7083
7084 BFD_ASSERT (h->dynindx != -1);
7085
7086 if (ppc_elf_hash_entry (h)->has_sda_refs)
7087 s = htab->relsbss;
7088 else
7089 s = htab->relbss;
7090 BFD_ASSERT (s != NULL);
7091
7092 rela.r_offset = (h->root.u.def.value
7093 + h->root.u.def.section->output_section->vma
7094 + h->root.u.def.section->output_offset);
7095 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7096 rela.r_addend = 0;
7097 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7098 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7099 }
7100
7101 #ifdef DEBUG
7102 fprintf (stderr, "\n");
7103 #endif
7104
7105 /* Mark some specially defined symbols as absolute. */
7106 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7107 || (!htab->is_vxworks
7108 && (h == htab->elf.hgot
7109 || strcmp (h->root.root.string,
7110 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7111 sym->st_shndx = SHN_ABS;
7112
7113 return TRUE;
7114 }
7115 \f
7116 static enum elf_reloc_type_class
7117 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7118 {
7119 switch (ELF32_R_TYPE (rela->r_info))
7120 {
7121 case R_PPC_RELATIVE:
7122 return reloc_class_relative;
7123 case R_PPC_REL24:
7124 case R_PPC_ADDR24:
7125 case R_PPC_JMP_SLOT:
7126 return reloc_class_plt;
7127 case R_PPC_COPY:
7128 return reloc_class_copy;
7129 default:
7130 return reloc_class_normal;
7131 }
7132 }
7133 \f
7134 /* Finish up the dynamic sections. */
7135
7136 static bfd_boolean
7137 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7138 struct bfd_link_info *info)
7139 {
7140 asection *sdyn;
7141 asection *splt;
7142 struct ppc_elf_link_hash_table *htab;
7143 bfd_vma got;
7144 bfd * dynobj;
7145
7146 #ifdef DEBUG
7147 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7148 #endif
7149
7150 htab = ppc_elf_hash_table (info);
7151 dynobj = elf_hash_table (info)->dynobj;
7152 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7153 if (htab->is_vxworks)
7154 splt = bfd_get_section_by_name (dynobj, ".plt");
7155 else
7156 splt = NULL;
7157
7158 got = 0;
7159 if (htab->elf.hgot != NULL)
7160 got = (htab->elf.hgot->root.u.def.value
7161 + htab->elf.hgot->root.u.def.section->output_section->vma
7162 + htab->elf.hgot->root.u.def.section->output_offset);
7163
7164 if (htab->elf.dynamic_sections_created)
7165 {
7166 Elf32_External_Dyn *dyncon, *dynconend;
7167
7168 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7169
7170 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7171 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7172 for (; dyncon < dynconend; dyncon++)
7173 {
7174 Elf_Internal_Dyn dyn;
7175 asection *s;
7176
7177 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7178
7179 switch (dyn.d_tag)
7180 {
7181 case DT_PLTGOT:
7182 if (htab->is_vxworks)
7183 s = htab->sgotplt;
7184 else
7185 s = htab->plt;
7186 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7187 break;
7188
7189 case DT_PLTRELSZ:
7190 dyn.d_un.d_val = htab->relplt->size;
7191 break;
7192
7193 case DT_JMPREL:
7194 s = htab->relplt;
7195 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7196 break;
7197
7198 case DT_PPC_GOT:
7199 dyn.d_un.d_ptr = got;
7200 break;
7201
7202 case DT_RELASZ:
7203 if (htab->is_vxworks)
7204 {
7205 if (htab->relplt)
7206 dyn.d_un.d_ptr -= htab->relplt->size;
7207 break;
7208 }
7209 continue;
7210
7211 default:
7212 continue;
7213 }
7214
7215 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7216 }
7217 }
7218
7219 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7220 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7221 if (htab->got != NULL)
7222 {
7223 unsigned char *p = htab->got->contents;
7224 bfd_vma val;
7225
7226 p += htab->elf.hgot->root.u.def.value;
7227 if (htab->plt_type == PLT_OLD)
7228 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7229
7230 val = 0;
7231 if (sdyn != NULL)
7232 val = sdyn->output_section->vma + sdyn->output_offset;
7233 bfd_put_32 (output_bfd, val, p);
7234
7235 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7236 }
7237
7238 /* Fill in the first entry in the VxWorks procedure linkage table. */
7239 if (splt && splt->size > 0)
7240 {
7241 /* Use the right PLT. */
7242 static const bfd_vma *plt_entry = NULL;
7243 plt_entry = info->shared ?
7244 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7245
7246 if (!info->shared)
7247 {
7248 bfd_vma got_value =
7249 (htab->elf.hgot->root.u.def.section->output_section->vma
7250 + htab->elf.hgot->root.u.def.section->output_offset
7251 + htab->elf.hgot->root.u.def.value);
7252 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7253
7254 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7255 splt->contents + 0);
7256 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7257 splt->contents + 4);
7258 }
7259 else
7260 {
7261 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7262 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7263 }
7264 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7265 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7266 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7267 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7268 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7269 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7270
7271 if (! info->shared)
7272 {
7273 Elf_Internal_Rela rela;
7274 bfd_byte *loc;
7275
7276 loc = htab->srelplt2->contents;
7277
7278 /* Output the @ha relocation for the first instruction. */
7279 rela.r_offset = (htab->plt->output_section->vma
7280 + htab->plt->output_offset
7281 + 2);
7282 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7283 rela.r_addend = 0;
7284 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7285 loc += sizeof (Elf32_External_Rela);
7286
7287 /* Output the @l relocation for the second instruction. */
7288 rela.r_offset = (htab->plt->output_section->vma
7289 + htab->plt->output_offset
7290 + 6);
7291 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7292 rela.r_addend = 0;
7293 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7294 loc += sizeof (Elf32_External_Rela);
7295
7296 /* Fix up the remaining relocations. They may have the wrong
7297 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7298 in which symbols were output. */
7299 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7300 {
7301 Elf_Internal_Rela rel;
7302
7303 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7304 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7305 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7306 loc += sizeof (Elf32_External_Rela);
7307
7308 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7309 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7310 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7311 loc += sizeof (Elf32_External_Rela);
7312
7313 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7314 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7315 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7316 loc += sizeof (Elf32_External_Rela);
7317 }
7318 }
7319 }
7320
7321 if (htab->glink != NULL && htab->glink->contents != NULL)
7322 {
7323 unsigned char *p;
7324 unsigned char *endp;
7325 bfd_vma res0;
7326 unsigned int i;
7327
7328 /*
7329 * PIC glink code is the following:
7330 *
7331 * # ith PLT code stub.
7332 * addis 11,30,(plt+(i-1)*4-got)@ha
7333 * lwz 11,(plt+(i-1)*4-got)@l(11)
7334 * mtctr 11
7335 * bctr
7336 *
7337 * # A table of branches, one for each plt entry.
7338 * # The idea is that the plt call stub loads ctr (and r11) with these
7339 * # addresses, so (r11 - res_0) gives the plt index * 4.
7340 * res_0: b PLTresolve
7341 * res_1: b PLTresolve
7342 * .
7343 * # Some number of entries towards the end can be nops
7344 * res_n_m3: nop
7345 * res_n_m2: nop
7346 * res_n_m1:
7347 *
7348 * PLTresolve:
7349 * addis 11,11,(1f-res_0)@ha
7350 * mflr 0
7351 * bcl 20,31,1f
7352 * 1: addi 11,11,(1b-res_0)@l
7353 * mflr 12
7354 * mtlr 0
7355 * sub 11,11,12 # r11 = index * 4
7356 * addis 12,12,(got+4-1b)@ha
7357 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7358 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7359 * mtctr 0
7360 * add 0,11,11
7361 * add 11,0,11 # r11 = index * 12 = reloc offset.
7362 * bctr
7363 */
7364 static const unsigned int pic_plt_resolve[] =
7365 {
7366 ADDIS_11_11,
7367 MFLR_0,
7368 BCL_20_31,
7369 ADDI_11_11,
7370 MFLR_12,
7371 MTLR_0,
7372 SUB_11_11_12,
7373 ADDIS_12_12,
7374 LWZ_0_12,
7375 LWZ_12_12,
7376 MTCTR_0,
7377 ADD_0_11_11,
7378 ADD_11_0_11,
7379 BCTR,
7380 NOP,
7381 NOP
7382 };
7383
7384 static const unsigned int plt_resolve[] =
7385 {
7386 LIS_12,
7387 ADDIS_11_11,
7388 LWZ_0_12,
7389 ADDI_11_11,
7390 MTCTR_0,
7391 ADD_0_11_11,
7392 LWZ_12_12,
7393 ADD_11_0_11,
7394 BCTR,
7395 NOP,
7396 NOP,
7397 NOP,
7398 NOP,
7399 NOP,
7400 NOP,
7401 NOP
7402 };
7403
7404 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7405 abort ();
7406 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7407 abort ();
7408
7409 /* Build the branch table, one for each plt entry (less one),
7410 and perhaps some padding. */
7411 p = htab->glink->contents;
7412 p += htab->glink_pltresolve;
7413 endp = htab->glink->contents;
7414 endp += htab->glink->size - GLINK_PLTRESOLVE;
7415 while (p < endp - 8 * 4)
7416 {
7417 bfd_put_32 (output_bfd, B + endp - p, p);
7418 p += 4;
7419 }
7420 while (p < endp)
7421 {
7422 bfd_put_32 (output_bfd, NOP, p);
7423 p += 4;
7424 }
7425
7426 res0 = (htab->glink_pltresolve
7427 + htab->glink->output_section->vma
7428 + htab->glink->output_offset);
7429
7430 /* Last comes the PLTresolve stub. */
7431 if (info->shared || info->pie)
7432 {
7433 bfd_vma bcl;
7434
7435 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7436 {
7437 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7438 p += 4;
7439 }
7440 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7441
7442 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7443 + htab->glink->output_section->vma
7444 + htab->glink->output_offset);
7445
7446 bfd_put_32 (output_bfd,
7447 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7448 bfd_put_32 (output_bfd,
7449 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7450 bfd_put_32 (output_bfd,
7451 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7452 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7453 {
7454 bfd_put_32 (output_bfd,
7455 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7456 bfd_put_32 (output_bfd,
7457 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7458 }
7459 else
7460 {
7461 bfd_put_32 (output_bfd,
7462 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7463 bfd_put_32 (output_bfd,
7464 LWZ_12_12 + 4, p + 9*4);
7465 }
7466 }
7467 else
7468 {
7469 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7470 {
7471 bfd_put_32 (output_bfd, plt_resolve[i], p);
7472 p += 4;
7473 }
7474 p -= 4 * ARRAY_SIZE (plt_resolve);
7475
7476 bfd_put_32 (output_bfd,
7477 LIS_12 + PPC_HA (got + 4), p + 0*4);
7478 bfd_put_32 (output_bfd,
7479 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7480 bfd_put_32 (output_bfd,
7481 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7482 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7483 {
7484 bfd_put_32 (output_bfd,
7485 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7486 bfd_put_32 (output_bfd,
7487 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7488 }
7489 else
7490 {
7491 bfd_put_32 (output_bfd,
7492 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7493 bfd_put_32 (output_bfd,
7494 LWZ_12_12 + 4, p + 6*4);
7495 }
7496 }
7497 }
7498
7499 return TRUE;
7500 }
7501 \f
7502 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7503 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7504 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7505 #define TARGET_BIG_NAME "elf32-powerpc"
7506 #define ELF_ARCH bfd_arch_powerpc
7507 #define ELF_MACHINE_CODE EM_PPC
7508 #ifdef __QNXTARGET__
7509 #define ELF_MAXPAGESIZE 0x1000
7510 #else
7511 #define ELF_MAXPAGESIZE 0x10000
7512 #endif
7513 #define ELF_MINPAGESIZE 0x1000
7514 #define ELF_COMMONPAGESIZE 0x1000
7515 #define elf_info_to_howto ppc_elf_info_to_howto
7516
7517 #ifdef EM_CYGNUS_POWERPC
7518 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7519 #endif
7520
7521 #ifdef EM_PPC_OLD
7522 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7523 #endif
7524
7525 #define elf_backend_plt_not_loaded 1
7526 #define elf_backend_can_gc_sections 1
7527 #define elf_backend_can_refcount 1
7528 #define elf_backend_rela_normal 1
7529
7530 #define bfd_elf32_mkobject ppc_elf_mkobject
7531 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7532 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7533 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7534 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7535 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7536 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7537
7538 #define elf_backend_object_p ppc_elf_object_p
7539 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7540 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7541 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7542 #define elf_backend_relocate_section ppc_elf_relocate_section
7543 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7544 #define elf_backend_check_relocs ppc_elf_check_relocs
7545 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7546 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7547 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7548 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7549 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7550 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7551 #define elf_backend_fake_sections ppc_elf_fake_sections
7552 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7553 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7554 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7555 #define elf_backend_write_core_note ppc_elf_write_core_note
7556 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7557 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7558 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7559 #define elf_backend_write_section ppc_elf_write_section
7560 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7561 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7562 #define elf_backend_action_discarded ppc_elf_action_discarded
7563 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7564
7565 #include "elf32-target.h"
7566
7567 /* VxWorks Target */
7568
7569 #undef TARGET_LITTLE_SYM
7570 #undef TARGET_LITTLE_NAME
7571
7572 #undef TARGET_BIG_SYM
7573 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7574 #undef TARGET_BIG_NAME
7575 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7576
7577 /* VxWorks uses the elf default section flags for .plt. */
7578 static const struct bfd_elf_special_section *
7579 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7580 {
7581 if (sec->name == NULL)
7582 return NULL;
7583
7584 if (strcmp (sec->name, ".plt") == 0)
7585 return _bfd_elf_get_sec_type_attr (abfd, sec);
7586
7587 return ppc_elf_get_sec_type_attr (abfd, sec);
7588 }
7589
7590 /* Like ppc_elf_link_hash_table_create, but overrides
7591 appropriately for VxWorks. */
7592 static struct bfd_link_hash_table *
7593 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7594 {
7595 struct bfd_link_hash_table *ret;
7596
7597 ret = ppc_elf_link_hash_table_create (abfd);
7598 if (ret)
7599 {
7600 struct ppc_elf_link_hash_table *htab
7601 = (struct ppc_elf_link_hash_table *)ret;
7602 htab->is_vxworks = 1;
7603 htab->plt_type = PLT_VXWORKS;
7604 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7605 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7606 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7607 }
7608 return ret;
7609 }
7610
7611 /* Tweak magic VxWorks symbols as they are loaded. */
7612 static bfd_boolean
7613 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7614 struct bfd_link_info *info,
7615 Elf_Internal_Sym *sym,
7616 const char **namep ATTRIBUTE_UNUSED,
7617 flagword *flagsp ATTRIBUTE_UNUSED,
7618 asection **secp,
7619 bfd_vma *valp)
7620 {
7621 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7622 valp))
7623 return FALSE;
7624
7625 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7626 }
7627
7628 static void
7629 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7630 {
7631 ppc_elf_final_write_processing(abfd, linker);
7632 elf_vxworks_final_write_processing(abfd, linker);
7633 }
7634
7635 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7636 define it. */
7637 #undef elf_backend_want_plt_sym
7638 #define elf_backend_want_plt_sym 1
7639 #undef elf_backend_want_got_plt
7640 #define elf_backend_want_got_plt 1
7641 #undef elf_backend_got_symbol_offset
7642 #define elf_backend_got_symbol_offset 0
7643 #undef elf_backend_plt_not_loaded
7644 #define elf_backend_plt_not_loaded 0
7645 #undef elf_backend_plt_readonly
7646 #define elf_backend_plt_readonly 1
7647 #undef elf_backend_got_header_size
7648 #define elf_backend_got_header_size 12
7649
7650 #undef bfd_elf32_bfd_link_hash_table_create
7651 #define bfd_elf32_bfd_link_hash_table_create \
7652 ppc_elf_vxworks_link_hash_table_create
7653 #undef elf_backend_add_symbol_hook
7654 #define elf_backend_add_symbol_hook \
7655 ppc_elf_vxworks_add_symbol_hook
7656 #undef elf_backend_link_output_symbol_hook
7657 #define elf_backend_link_output_symbol_hook \
7658 elf_vxworks_link_output_symbol_hook
7659 #undef elf_backend_final_write_processing
7660 #define elf_backend_final_write_processing \
7661 ppc_elf_vxworks_final_write_processing
7662 #undef elf_backend_get_sec_type_attr
7663 #define elf_backend_get_sec_type_attr \
7664 ppc_elf_vxworks_get_sec_type_attr
7665 #undef elf_backend_emit_relocs
7666 #define elf_backend_emit_relocs \
7667 elf_vxworks_emit_relocs
7668
7669 #undef elf32_bed
7670 #define elf32_bed ppc_elf_vxworks_bed
7671
7672 #include "elf32-target.h"
GDB Binutils - Deliverables
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