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PowerPC TPREL16_HA/LO reloc optimization
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright (C) 1994-2017 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
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 #include "dwarf2.h"
38 #include "opcode/ppc.h"
39
40 typedef enum split16_format_type
41 {
42 split16a_type = 0,
43 split16d_type
44 }
45 split16_format_type;
46
47 /* RELA relocations are used here. */
48
49 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
50 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
51 static bfd_reloc_status_type ppc_elf_unhandled_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53
54 /* Branch prediction bit for branch taken relocs. */
55 #define BRANCH_PREDICT_BIT 0x200000
56 /* Mask to set RA in memory instructions. */
57 #define RA_REGISTER_MASK 0x001f0000
58 /* Value to shift register by to insert RA. */
59 #define RA_REGISTER_SHIFT 16
60
61 /* The name of the dynamic interpreter. This is put in the .interp
62 section. */
63 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
64
65 /* For old-style PLT. */
66 /* The number of single-slot PLT entries (the rest use two slots). */
67 #define PLT_NUM_SINGLE_ENTRIES 8192
68
69 /* For new-style .glink and .plt. */
70 #define GLINK_PLTRESOLVE 16*4
71 #define GLINK_ENTRY_SIZE 4*4
72 #define TLS_GET_ADDR_GLINK_SIZE 12*4
73
74 /* VxWorks uses its own plt layout, filled in by the static linker. */
75
76 /* The standard VxWorks PLT entry. */
77 #define VXWORKS_PLT_ENTRY_SIZE 32
78 static const bfd_vma ppc_elf_vxworks_plt_entry
79 [VXWORKS_PLT_ENTRY_SIZE / 4] =
80 {
81 0x3d800000, /* lis r12,0 */
82 0x818c0000, /* lwz r12,0(r12) */
83 0x7d8903a6, /* mtctr r12 */
84 0x4e800420, /* bctr */
85 0x39600000, /* li r11,0 */
86 0x48000000, /* b 14 <.PLT0resolve+0x4> */
87 0x60000000, /* nop */
88 0x60000000, /* nop */
89 };
90 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
91 [VXWORKS_PLT_ENTRY_SIZE / 4] =
92 {
93 0x3d9e0000, /* addis r12,r30,0 */
94 0x818c0000, /* lwz r12,0(r12) */
95 0x7d8903a6, /* mtctr r12 */
96 0x4e800420, /* bctr */
97 0x39600000, /* li r11,0 */
98 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
99 0x60000000, /* nop */
100 0x60000000, /* nop */
101 };
102
103 /* The initial VxWorks PLT entry. */
104 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
105 static const bfd_vma ppc_elf_vxworks_plt0_entry
106 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
107 {
108 0x3d800000, /* lis r12,0 */
109 0x398c0000, /* addi r12,r12,0 */
110 0x800c0008, /* lwz r0,8(r12) */
111 0x7c0903a6, /* mtctr r0 */
112 0x818c0004, /* lwz r12,4(r12) */
113 0x4e800420, /* bctr */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 };
117 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
118 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
119 {
120 0x819e0008, /* lwz r12,8(r30) */
121 0x7d8903a6, /* mtctr r12 */
122 0x819e0004, /* lwz r12,4(r30) */
123 0x4e800420, /* bctr */
124 0x60000000, /* nop */
125 0x60000000, /* nop */
126 0x60000000, /* nop */
127 0x60000000, /* nop */
128 };
129
130 /* For executables, we have some additional relocations in
131 .rela.plt.unloaded, for the kernel loader. */
132
133 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
134 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
135 /* The number of relocations in the PLTResolve slot. */
136 #define VXWORKS_PLTRESOLVE_RELOCS 2
137 /* The number of relocations in the PLTResolve slot when creating
138 a shared library. */
139 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
140
141 /* Some instructions. */
142 #define ADDIS_11_11 0x3d6b0000
143 #define ADDIS_11_30 0x3d7e0000
144 #define ADDIS_12_12 0x3d8c0000
145 #define ADDI_11_11 0x396b0000
146 #define ADD_0_11_11 0x7c0b5a14
147 #define ADD_3_12_2 0x7c6c1214
148 #define ADD_11_0_11 0x7d605a14
149 #define B 0x48000000
150 #define BA 0x48000002
151 #define BCL_20_31 0x429f0005
152 #define BCTR 0x4e800420
153 #define BEQLR 0x4d820020
154 #define CMPWI_11_0 0x2c0b0000
155 #define LIS_11 0x3d600000
156 #define LIS_12 0x3d800000
157 #define LWZU_0_12 0x840c0000
158 #define LWZ_0_12 0x800c0000
159 #define LWZ_11_3 0x81630000
160 #define LWZ_11_11 0x816b0000
161 #define LWZ_11_30 0x817e0000
162 #define LWZ_12_3 0x81830000
163 #define LWZ_12_12 0x818c0000
164 #define MR_0_3 0x7c601b78
165 #define MR_3_0 0x7c030378
166 #define MFLR_0 0x7c0802a6
167 #define MFLR_12 0x7d8802a6
168 #define MTCTR_0 0x7c0903a6
169 #define MTCTR_11 0x7d6903a6
170 #define MTLR_0 0x7c0803a6
171 #define NOP 0x60000000
172 #define SUB_11_11_12 0x7d6c5850
173
174 /* Offset of tp and dtp pointers from start of TLS block. */
175 #define TP_OFFSET 0x7000
176 #define DTP_OFFSET 0x8000
177
178 /* The value of a defined global symbol. */
179 #define SYM_VAL(SYM) \
180 ((SYM)->root.u.def.section->output_section->vma \
181 + (SYM)->root.u.def.section->output_offset \
182 + (SYM)->root.u.def.value)
183 \f
184 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
185
186 static reloc_howto_type ppc_elf_howto_raw[] = {
187 /* This reloc does nothing. */
188 HOWTO (R_PPC_NONE, /* type */
189 0, /* rightshift */
190 3, /* size (0 = byte, 1 = short, 2 = long) */
191 0, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_dont, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_PPC_NONE", /* name */
197 FALSE, /* partial_inplace */
198 0, /* src_mask */
199 0, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 /* A standard 32 bit relocation. */
203 HOWTO (R_PPC_ADDR32, /* type */
204 0, /* rightshift */
205 2, /* size (0 = byte, 1 = short, 2 = long) */
206 32, /* bitsize */
207 FALSE, /* pc_relative */
208 0, /* bitpos */
209 complain_overflow_dont, /* complain_on_overflow */
210 bfd_elf_generic_reloc, /* special_function */
211 "R_PPC_ADDR32", /* name */
212 FALSE, /* partial_inplace */
213 0, /* src_mask */
214 0xffffffff, /* dst_mask */
215 FALSE), /* pcrel_offset */
216
217 /* An absolute 26 bit branch; the lower two bits must be zero.
218 FIXME: we don't check that, we just clear them. */
219 HOWTO (R_PPC_ADDR24, /* type */
220 0, /* rightshift */
221 2, /* size (0 = byte, 1 = short, 2 = long) */
222 26, /* bitsize */
223 FALSE, /* pc_relative */
224 0, /* bitpos */
225 complain_overflow_signed, /* complain_on_overflow */
226 bfd_elf_generic_reloc, /* special_function */
227 "R_PPC_ADDR24", /* name */
228 FALSE, /* partial_inplace */
229 0, /* src_mask */
230 0x3fffffc, /* dst_mask */
231 FALSE), /* pcrel_offset */
232
233 /* A standard 16 bit relocation. */
234 HOWTO (R_PPC_ADDR16, /* type */
235 0, /* rightshift */
236 1, /* size (0 = byte, 1 = short, 2 = long) */
237 16, /* bitsize */
238 FALSE, /* pc_relative */
239 0, /* bitpos */
240 complain_overflow_bitfield, /* complain_on_overflow */
241 bfd_elf_generic_reloc, /* special_function */
242 "R_PPC_ADDR16", /* name */
243 FALSE, /* partial_inplace */
244 0, /* src_mask */
245 0xffff, /* dst_mask */
246 FALSE), /* pcrel_offset */
247
248 /* A 16 bit relocation without overflow. */
249 HOWTO (R_PPC_ADDR16_LO, /* type */
250 0, /* rightshift */
251 1, /* size (0 = byte, 1 = short, 2 = long) */
252 16, /* bitsize */
253 FALSE, /* pc_relative */
254 0, /* bitpos */
255 complain_overflow_dont,/* complain_on_overflow */
256 bfd_elf_generic_reloc, /* special_function */
257 "R_PPC_ADDR16_LO", /* name */
258 FALSE, /* partial_inplace */
259 0, /* src_mask */
260 0xffff, /* dst_mask */
261 FALSE), /* pcrel_offset */
262
263 /* The high order 16 bits of an address. */
264 HOWTO (R_PPC_ADDR16_HI, /* type */
265 16, /* rightshift */
266 1, /* size (0 = byte, 1 = short, 2 = long) */
267 16, /* bitsize */
268 FALSE, /* pc_relative */
269 0, /* bitpos */
270 complain_overflow_dont, /* complain_on_overflow */
271 bfd_elf_generic_reloc, /* special_function */
272 "R_PPC_ADDR16_HI", /* name */
273 FALSE, /* partial_inplace */
274 0, /* src_mask */
275 0xffff, /* dst_mask */
276 FALSE), /* pcrel_offset */
277
278 /* The high order 16 bits of an address, plus 1 if the contents of
279 the low 16 bits, treated as a signed number, is negative. */
280 HOWTO (R_PPC_ADDR16_HA, /* type */
281 16, /* rightshift */
282 1, /* size (0 = byte, 1 = short, 2 = long) */
283 16, /* bitsize */
284 FALSE, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_dont, /* complain_on_overflow */
287 ppc_elf_addr16_ha_reloc, /* special_function */
288 "R_PPC_ADDR16_HA", /* name */
289 FALSE, /* partial_inplace */
290 0, /* src_mask */
291 0xffff, /* dst_mask */
292 FALSE), /* pcrel_offset */
293
294 /* An absolute 16 bit branch; the lower two bits must be zero.
295 FIXME: we don't check that, we just clear them. */
296 HOWTO (R_PPC_ADDR14, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_signed, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14", /* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is expected to be taken. The lower two
312 bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_signed, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* An absolute 16 bit branch, for which bit 10 should be set to
328 indicate that the branch is not expected to be taken. The lower
329 two bits must be zero. */
330 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 16, /* bitsize */
334 FALSE, /* pc_relative */
335 0, /* bitpos */
336 complain_overflow_signed, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 "R_PPC_ADDR14_BRNTAKEN",/* name */
339 FALSE, /* partial_inplace */
340 0, /* src_mask */
341 0xfffc, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A relative 26 bit branch; the lower two bits must be zero. */
345 HOWTO (R_PPC_REL24, /* type */
346 0, /* rightshift */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
348 26, /* bitsize */
349 TRUE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_signed, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 "R_PPC_REL24", /* name */
354 FALSE, /* partial_inplace */
355 0, /* src_mask */
356 0x3fffffc, /* dst_mask */
357 TRUE), /* pcrel_offset */
358
359 /* A relative 16 bit branch; the lower two bits must be zero. */
360 HOWTO (R_PPC_REL14, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is expected to be taken. The lower two bits must be
376 zero. */
377 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRTAKEN", /* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* A relative 16 bit branch. Bit 10 should be set to indicate that
392 the branch is not expected to be taken. The lower two bits must
393 be zero. */
394 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
395 0, /* rightshift */
396 2, /* size (0 = byte, 1 = short, 2 = long) */
397 16, /* bitsize */
398 TRUE, /* pc_relative */
399 0, /* bitpos */
400 complain_overflow_signed, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 "R_PPC_REL14_BRNTAKEN",/* name */
403 FALSE, /* partial_inplace */
404 0, /* src_mask */
405 0xfffc, /* dst_mask */
406 TRUE), /* pcrel_offset */
407
408 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
409 symbol. */
410 HOWTO (R_PPC_GOT16, /* type */
411 0, /* rightshift */
412 1, /* size (0 = byte, 1 = short, 2 = long) */
413 16, /* bitsize */
414 FALSE, /* pc_relative */
415 0, /* bitpos */
416 complain_overflow_signed, /* complain_on_overflow */
417 ppc_elf_unhandled_reloc, /* special_function */
418 "R_PPC_GOT16", /* name */
419 FALSE, /* partial_inplace */
420 0, /* src_mask */
421 0xffff, /* dst_mask */
422 FALSE), /* pcrel_offset */
423
424 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
425 the symbol. */
426 HOWTO (R_PPC_GOT16_LO, /* type */
427 0, /* rightshift */
428 1, /* size (0 = byte, 1 = short, 2 = long) */
429 16, /* bitsize */
430 FALSE, /* pc_relative */
431 0, /* bitpos */
432 complain_overflow_dont, /* complain_on_overflow */
433 ppc_elf_unhandled_reloc, /* special_function */
434 "R_PPC_GOT16_LO", /* name */
435 FALSE, /* partial_inplace */
436 0, /* src_mask */
437 0xffff, /* dst_mask */
438 FALSE), /* pcrel_offset */
439
440 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
441 the symbol. */
442 HOWTO (R_PPC_GOT16_HI, /* type */
443 16, /* rightshift */
444 1, /* size (0 = byte, 1 = short, 2 = long) */
445 16, /* bitsize */
446 FALSE, /* pc_relative */
447 0, /* bitpos */
448 complain_overflow_dont, /* complain_on_overflow */
449 ppc_elf_unhandled_reloc, /* special_function */
450 "R_PPC_GOT16_HI", /* name */
451 FALSE, /* partial_inplace */
452 0, /* src_mask */
453 0xffff, /* dst_mask */
454 FALSE), /* pcrel_offset */
455
456 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
457 the symbol. */
458 HOWTO (R_PPC_GOT16_HA, /* type */
459 16, /* rightshift */
460 1, /* size (0 = byte, 1 = short, 2 = long) */
461 16, /* bitsize */
462 FALSE, /* pc_relative */
463 0, /* bitpos */
464 complain_overflow_dont, /* complain_on_overflow */
465 ppc_elf_unhandled_reloc, /* special_function */
466 "R_PPC_GOT16_HA", /* name */
467 FALSE, /* partial_inplace */
468 0, /* src_mask */
469 0xffff, /* dst_mask */
470 FALSE), /* pcrel_offset */
471
472 /* Like R_PPC_REL24, but referring to the procedure linkage table
473 entry for the symbol. */
474 HOWTO (R_PPC_PLTREL24, /* type */
475 0, /* rightshift */
476 2, /* size (0 = byte, 1 = short, 2 = long) */
477 26, /* bitsize */
478 TRUE, /* pc_relative */
479 0, /* bitpos */
480 complain_overflow_signed, /* complain_on_overflow */
481 ppc_elf_unhandled_reloc, /* special_function */
482 "R_PPC_PLTREL24", /* name */
483 FALSE, /* partial_inplace */
484 0, /* src_mask */
485 0x3fffffc, /* dst_mask */
486 TRUE), /* pcrel_offset */
487
488 /* This is used only by the dynamic linker. The symbol should exist
489 both in the object being run and in some shared library. The
490 dynamic linker copies the data addressed by the symbol from the
491 shared library into the object, because the object being
492 run has to have the data at some particular address. */
493 HOWTO (R_PPC_COPY, /* type */
494 0, /* rightshift */
495 2, /* size (0 = byte, 1 = short, 2 = long) */
496 32, /* bitsize */
497 FALSE, /* pc_relative */
498 0, /* bitpos */
499 complain_overflow_dont, /* complain_on_overflow */
500 ppc_elf_unhandled_reloc, /* special_function */
501 "R_PPC_COPY", /* name */
502 FALSE, /* partial_inplace */
503 0, /* src_mask */
504 0, /* dst_mask */
505 FALSE), /* pcrel_offset */
506
507 /* Like R_PPC_ADDR32, but used when setting global offset table
508 entries. */
509 HOWTO (R_PPC_GLOB_DAT, /* type */
510 0, /* rightshift */
511 2, /* size (0 = byte, 1 = short, 2 = long) */
512 32, /* bitsize */
513 FALSE, /* pc_relative */
514 0, /* bitpos */
515 complain_overflow_dont, /* complain_on_overflow */
516 ppc_elf_unhandled_reloc, /* special_function */
517 "R_PPC_GLOB_DAT", /* name */
518 FALSE, /* partial_inplace */
519 0, /* src_mask */
520 0xffffffff, /* dst_mask */
521 FALSE), /* pcrel_offset */
522
523 /* Marks a procedure linkage table entry for a symbol. */
524 HOWTO (R_PPC_JMP_SLOT, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_dont, /* complain_on_overflow */
531 ppc_elf_unhandled_reloc, /* special_function */
532 "R_PPC_JMP_SLOT", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Used only by the dynamic linker. When the object is run, this
539 longword is set to the load address of the object, plus the
540 addend. */
541 HOWTO (R_PPC_RELATIVE, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 32, /* bitsize */
545 FALSE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_dont, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_RELATIVE", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0xffffffff, /* dst_mask */
553 FALSE), /* pcrel_offset */
554
555 /* Like R_PPC_REL24, but uses the value of the symbol within the
556 object rather than the final value. Normally used for
557 _GLOBAL_OFFSET_TABLE_. */
558 HOWTO (R_PPC_LOCAL24PC, /* type */
559 0, /* rightshift */
560 2, /* size (0 = byte, 1 = short, 2 = long) */
561 26, /* bitsize */
562 TRUE, /* pc_relative */
563 0, /* bitpos */
564 complain_overflow_signed, /* complain_on_overflow */
565 bfd_elf_generic_reloc, /* special_function */
566 "R_PPC_LOCAL24PC", /* name */
567 FALSE, /* partial_inplace */
568 0, /* src_mask */
569 0x3fffffc, /* dst_mask */
570 TRUE), /* pcrel_offset */
571
572 /* Like R_PPC_ADDR32, but may be unaligned. */
573 HOWTO (R_PPC_UADDR32, /* type */
574 0, /* rightshift */
575 2, /* size (0 = byte, 1 = short, 2 = long) */
576 32, /* bitsize */
577 FALSE, /* pc_relative */
578 0, /* bitpos */
579 complain_overflow_dont, /* complain_on_overflow */
580 bfd_elf_generic_reloc, /* special_function */
581 "R_PPC_UADDR32", /* name */
582 FALSE, /* partial_inplace */
583 0, /* src_mask */
584 0xffffffff, /* dst_mask */
585 FALSE), /* pcrel_offset */
586
587 /* Like R_PPC_ADDR16, but may be unaligned. */
588 HOWTO (R_PPC_UADDR16, /* type */
589 0, /* rightshift */
590 1, /* size (0 = byte, 1 = short, 2 = long) */
591 16, /* bitsize */
592 FALSE, /* pc_relative */
593 0, /* bitpos */
594 complain_overflow_bitfield, /* complain_on_overflow */
595 bfd_elf_generic_reloc, /* special_function */
596 "R_PPC_UADDR16", /* name */
597 FALSE, /* partial_inplace */
598 0, /* src_mask */
599 0xffff, /* dst_mask */
600 FALSE), /* pcrel_offset */
601
602 /* 32-bit PC relative */
603 HOWTO (R_PPC_REL32, /* type */
604 0, /* rightshift */
605 2, /* size (0 = byte, 1 = short, 2 = long) */
606 32, /* bitsize */
607 TRUE, /* pc_relative */
608 0, /* bitpos */
609 complain_overflow_dont, /* complain_on_overflow */
610 bfd_elf_generic_reloc, /* special_function */
611 "R_PPC_REL32", /* name */
612 FALSE, /* partial_inplace */
613 0, /* src_mask */
614 0xffffffff, /* dst_mask */
615 TRUE), /* pcrel_offset */
616
617 /* 32-bit relocation to the symbol's procedure linkage table.
618 FIXME: not supported. */
619 HOWTO (R_PPC_PLT32, /* type */
620 0, /* rightshift */
621 2, /* size (0 = byte, 1 = short, 2 = long) */
622 32, /* bitsize */
623 FALSE, /* pc_relative */
624 0, /* bitpos */
625 complain_overflow_dont, /* complain_on_overflow */
626 ppc_elf_unhandled_reloc, /* special_function */
627 "R_PPC_PLT32", /* name */
628 FALSE, /* partial_inplace */
629 0, /* src_mask */
630 0, /* dst_mask */
631 FALSE), /* pcrel_offset */
632
633 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
634 FIXME: not supported. */
635 HOWTO (R_PPC_PLTREL32, /* type */
636 0, /* rightshift */
637 2, /* size (0 = byte, 1 = short, 2 = long) */
638 32, /* bitsize */
639 TRUE, /* pc_relative */
640 0, /* bitpos */
641 complain_overflow_dont, /* complain_on_overflow */
642 ppc_elf_unhandled_reloc, /* special_function */
643 "R_PPC_PLTREL32", /* name */
644 FALSE, /* partial_inplace */
645 0, /* src_mask */
646 0, /* dst_mask */
647 TRUE), /* pcrel_offset */
648
649 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
650 the symbol. */
651 HOWTO (R_PPC_PLT16_LO, /* type */
652 0, /* rightshift */
653 1, /* size (0 = byte, 1 = short, 2 = long) */
654 16, /* bitsize */
655 FALSE, /* pc_relative */
656 0, /* bitpos */
657 complain_overflow_dont, /* complain_on_overflow */
658 ppc_elf_unhandled_reloc, /* special_function */
659 "R_PPC_PLT16_LO", /* name */
660 FALSE, /* partial_inplace */
661 0, /* src_mask */
662 0xffff, /* dst_mask */
663 FALSE), /* pcrel_offset */
664
665 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
666 the symbol. */
667 HOWTO (R_PPC_PLT16_HI, /* type */
668 16, /* rightshift */
669 1, /* size (0 = byte, 1 = short, 2 = long) */
670 16, /* bitsize */
671 FALSE, /* pc_relative */
672 0, /* bitpos */
673 complain_overflow_dont, /* complain_on_overflow */
674 ppc_elf_unhandled_reloc, /* special_function */
675 "R_PPC_PLT16_HI", /* name */
676 FALSE, /* partial_inplace */
677 0, /* src_mask */
678 0xffff, /* dst_mask */
679 FALSE), /* pcrel_offset */
680
681 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
682 the symbol. */
683 HOWTO (R_PPC_PLT16_HA, /* type */
684 16, /* rightshift */
685 1, /* size (0 = byte, 1 = short, 2 = long) */
686 16, /* bitsize */
687 FALSE, /* pc_relative */
688 0, /* bitpos */
689 complain_overflow_dont, /* complain_on_overflow */
690 ppc_elf_unhandled_reloc, /* special_function */
691 "R_PPC_PLT16_HA", /* name */
692 FALSE, /* partial_inplace */
693 0, /* src_mask */
694 0xffff, /* dst_mask */
695 FALSE), /* pcrel_offset */
696
697 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
698 small data items. */
699 HOWTO (R_PPC_SDAREL16, /* type */
700 0, /* rightshift */
701 1, /* size (0 = byte, 1 = short, 2 = long) */
702 16, /* bitsize */
703 FALSE, /* pc_relative */
704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 ppc_elf_unhandled_reloc, /* special_function */
707 "R_PPC_SDAREL16", /* name */
708 FALSE, /* partial_inplace */
709 0, /* src_mask */
710 0xffff, /* dst_mask */
711 FALSE), /* pcrel_offset */
712
713 /* 16-bit section relative relocation. */
714 HOWTO (R_PPC_SECTOFF, /* type */
715 0, /* rightshift */
716 1, /* size (0 = byte, 1 = short, 2 = long) */
717 16, /* bitsize */
718 FALSE, /* pc_relative */
719 0, /* bitpos */
720 complain_overflow_signed, /* complain_on_overflow */
721 ppc_elf_unhandled_reloc, /* special_function */
722 "R_PPC_SECTOFF", /* name */
723 FALSE, /* partial_inplace */
724 0, /* src_mask */
725 0xffff, /* dst_mask */
726 FALSE), /* pcrel_offset */
727
728 /* 16-bit lower half section relative relocation. */
729 HOWTO (R_PPC_SECTOFF_LO, /* type */
730 0, /* rightshift */
731 1, /* size (0 = byte, 1 = short, 2 = long) */
732 16, /* bitsize */
733 FALSE, /* pc_relative */
734 0, /* bitpos */
735 complain_overflow_dont, /* complain_on_overflow */
736 ppc_elf_unhandled_reloc, /* special_function */
737 "R_PPC_SECTOFF_LO", /* name */
738 FALSE, /* partial_inplace */
739 0, /* src_mask */
740 0xffff, /* dst_mask */
741 FALSE), /* pcrel_offset */
742
743 /* 16-bit upper half section relative relocation. */
744 HOWTO (R_PPC_SECTOFF_HI, /* type */
745 16, /* rightshift */
746 1, /* size (0 = byte, 1 = short, 2 = long) */
747 16, /* bitsize */
748 FALSE, /* pc_relative */
749 0, /* bitpos */
750 complain_overflow_dont, /* complain_on_overflow */
751 ppc_elf_unhandled_reloc, /* special_function */
752 "R_PPC_SECTOFF_HI", /* name */
753 FALSE, /* partial_inplace */
754 0, /* src_mask */
755 0xffff, /* dst_mask */
756 FALSE), /* pcrel_offset */
757
758 /* 16-bit upper half adjusted section relative relocation. */
759 HOWTO (R_PPC_SECTOFF_HA, /* type */
760 16, /* rightshift */
761 1, /* size (0 = byte, 1 = short, 2 = long) */
762 16, /* bitsize */
763 FALSE, /* pc_relative */
764 0, /* bitpos */
765 complain_overflow_dont, /* complain_on_overflow */
766 ppc_elf_unhandled_reloc, /* special_function */
767 "R_PPC_SECTOFF_HA", /* name */
768 FALSE, /* partial_inplace */
769 0, /* src_mask */
770 0xffff, /* dst_mask */
771 FALSE), /* pcrel_offset */
772
773 /* Marker relocs for TLS. */
774 HOWTO (R_PPC_TLS,
775 0, /* rightshift */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
777 32, /* bitsize */
778 FALSE, /* pc_relative */
779 0, /* bitpos */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 "R_PPC_TLS", /* name */
783 FALSE, /* partial_inplace */
784 0, /* src_mask */
785 0, /* dst_mask */
786 FALSE), /* pcrel_offset */
787
788 HOWTO (R_PPC_TLSGD,
789 0, /* rightshift */
790 2, /* size (0 = byte, 1 = short, 2 = long) */
791 32, /* bitsize */
792 FALSE, /* pc_relative */
793 0, /* bitpos */
794 complain_overflow_dont, /* complain_on_overflow */
795 bfd_elf_generic_reloc, /* special_function */
796 "R_PPC_TLSGD", /* name */
797 FALSE, /* partial_inplace */
798 0, /* src_mask */
799 0, /* dst_mask */
800 FALSE), /* pcrel_offset */
801
802 HOWTO (R_PPC_TLSLD,
803 0, /* rightshift */
804 2, /* size (0 = byte, 1 = short, 2 = long) */
805 32, /* bitsize */
806 FALSE, /* pc_relative */
807 0, /* bitpos */
808 complain_overflow_dont, /* complain_on_overflow */
809 bfd_elf_generic_reloc, /* special_function */
810 "R_PPC_TLSLD", /* name */
811 FALSE, /* partial_inplace */
812 0, /* src_mask */
813 0, /* dst_mask */
814 FALSE), /* pcrel_offset */
815
816 /* Computes the load module index of the load module that contains the
817 definition of its TLS sym. */
818 HOWTO (R_PPC_DTPMOD32,
819 0, /* rightshift */
820 2, /* size (0 = byte, 1 = short, 2 = long) */
821 32, /* bitsize */
822 FALSE, /* pc_relative */
823 0, /* bitpos */
824 complain_overflow_dont, /* complain_on_overflow */
825 ppc_elf_unhandled_reloc, /* special_function */
826 "R_PPC_DTPMOD32", /* name */
827 FALSE, /* partial_inplace */
828 0, /* src_mask */
829 0xffffffff, /* dst_mask */
830 FALSE), /* pcrel_offset */
831
832 /* Computes a dtv-relative displacement, the difference between the value
833 of sym+add and the base address of the thread-local storage block that
834 contains the definition of sym, minus 0x8000. */
835 HOWTO (R_PPC_DTPREL32,
836 0, /* rightshift */
837 2, /* size (0 = byte, 1 = short, 2 = long) */
838 32, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL32", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffffffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* A 16 bit dtprel reloc. */
850 HOWTO (R_PPC_DTPREL16,
851 0, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_signed, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Like DTPREL16, but no overflow. */
865 HOWTO (R_PPC_DTPREL16_LO,
866 0, /* rightshift */
867 1, /* size (0 = byte, 1 = short, 2 = long) */
868 16, /* bitsize */
869 FALSE, /* pc_relative */
870 0, /* bitpos */
871 complain_overflow_dont, /* complain_on_overflow */
872 ppc_elf_unhandled_reloc, /* special_function */
873 "R_PPC_DTPREL16_LO", /* name */
874 FALSE, /* partial_inplace */
875 0, /* src_mask */
876 0xffff, /* dst_mask */
877 FALSE), /* pcrel_offset */
878
879 /* Like DTPREL16_LO, but next higher group of 16 bits. */
880 HOWTO (R_PPC_DTPREL16_HI,
881 16, /* rightshift */
882 1, /* size (0 = byte, 1 = short, 2 = long) */
883 16, /* bitsize */
884 FALSE, /* pc_relative */
885 0, /* bitpos */
886 complain_overflow_dont, /* complain_on_overflow */
887 ppc_elf_unhandled_reloc, /* special_function */
888 "R_PPC_DTPREL16_HI", /* name */
889 FALSE, /* partial_inplace */
890 0, /* src_mask */
891 0xffff, /* dst_mask */
892 FALSE), /* pcrel_offset */
893
894 /* Like DTPREL16_HI, but adjust for low 16 bits. */
895 HOWTO (R_PPC_DTPREL16_HA,
896 16, /* rightshift */
897 1, /* size (0 = byte, 1 = short, 2 = long) */
898 16, /* bitsize */
899 FALSE, /* pc_relative */
900 0, /* bitpos */
901 complain_overflow_dont, /* complain_on_overflow */
902 ppc_elf_unhandled_reloc, /* special_function */
903 "R_PPC_DTPREL16_HA", /* name */
904 FALSE, /* partial_inplace */
905 0, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
908
909 /* Computes a tp-relative displacement, the difference between the value of
910 sym+add and the value of the thread pointer (r13). */
911 HOWTO (R_PPC_TPREL32,
912 0, /* rightshift */
913 2, /* size (0 = byte, 1 = short, 2 = long) */
914 32, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL32", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffffffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* A 16 bit tprel reloc. */
926 HOWTO (R_PPC_TPREL16,
927 0, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_signed, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Like TPREL16, but no overflow. */
941 HOWTO (R_PPC_TPREL16_LO,
942 0, /* rightshift */
943 1, /* size (0 = byte, 1 = short, 2 = long) */
944 16, /* bitsize */
945 FALSE, /* pc_relative */
946 0, /* bitpos */
947 complain_overflow_dont, /* complain_on_overflow */
948 ppc_elf_unhandled_reloc, /* special_function */
949 "R_PPC_TPREL16_LO", /* name */
950 FALSE, /* partial_inplace */
951 0, /* src_mask */
952 0xffff, /* dst_mask */
953 FALSE), /* pcrel_offset */
954
955 /* Like TPREL16_LO, but next higher group of 16 bits. */
956 HOWTO (R_PPC_TPREL16_HI,
957 16, /* rightshift */
958 1, /* size (0 = byte, 1 = short, 2 = long) */
959 16, /* bitsize */
960 FALSE, /* pc_relative */
961 0, /* bitpos */
962 complain_overflow_dont, /* complain_on_overflow */
963 ppc_elf_unhandled_reloc, /* special_function */
964 "R_PPC_TPREL16_HI", /* name */
965 FALSE, /* partial_inplace */
966 0, /* src_mask */
967 0xffff, /* dst_mask */
968 FALSE), /* pcrel_offset */
969
970 /* Like TPREL16_HI, but adjust for low 16 bits. */
971 HOWTO (R_PPC_TPREL16_HA,
972 16, /* rightshift */
973 1, /* size (0 = byte, 1 = short, 2 = long) */
974 16, /* bitsize */
975 FALSE, /* pc_relative */
976 0, /* bitpos */
977 complain_overflow_dont, /* complain_on_overflow */
978 ppc_elf_unhandled_reloc, /* special_function */
979 "R_PPC_TPREL16_HA", /* name */
980 FALSE, /* partial_inplace */
981 0, /* src_mask */
982 0xffff, /* dst_mask */
983 FALSE), /* pcrel_offset */
984
985 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
986 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
987 to the first entry. */
988 HOWTO (R_PPC_GOT_TLSGD16,
989 0, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_signed, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Like GOT_TLSGD16, but no overflow. */
1003 HOWTO (R_PPC_GOT_TLSGD16_LO,
1004 0, /* rightshift */
1005 1, /* size (0 = byte, 1 = short, 2 = long) */
1006 16, /* bitsize */
1007 FALSE, /* pc_relative */
1008 0, /* bitpos */
1009 complain_overflow_dont, /* complain_on_overflow */
1010 ppc_elf_unhandled_reloc, /* special_function */
1011 "R_PPC_GOT_TLSGD16_LO", /* name */
1012 FALSE, /* partial_inplace */
1013 0, /* src_mask */
1014 0xffff, /* dst_mask */
1015 FALSE), /* pcrel_offset */
1016
1017 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1018 HOWTO (R_PPC_GOT_TLSGD16_HI,
1019 16, /* rightshift */
1020 1, /* size (0 = byte, 1 = short, 2 = long) */
1021 16, /* bitsize */
1022 FALSE, /* pc_relative */
1023 0, /* bitpos */
1024 complain_overflow_dont, /* complain_on_overflow */
1025 ppc_elf_unhandled_reloc, /* special_function */
1026 "R_PPC_GOT_TLSGD16_HI", /* name */
1027 FALSE, /* partial_inplace */
1028 0, /* src_mask */
1029 0xffff, /* dst_mask */
1030 FALSE), /* pcrel_offset */
1031
1032 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1033 HOWTO (R_PPC_GOT_TLSGD16_HA,
1034 16, /* rightshift */
1035 1, /* size (0 = byte, 1 = short, 2 = long) */
1036 16, /* bitsize */
1037 FALSE, /* pc_relative */
1038 0, /* bitpos */
1039 complain_overflow_dont, /* complain_on_overflow */
1040 ppc_elf_unhandled_reloc, /* special_function */
1041 "R_PPC_GOT_TLSGD16_HA", /* name */
1042 FALSE, /* partial_inplace */
1043 0, /* src_mask */
1044 0xffff, /* dst_mask */
1045 FALSE), /* pcrel_offset */
1046
1047 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1048 with values (sym+add)@dtpmod and zero, and computes the offset to the
1049 first entry. */
1050 HOWTO (R_PPC_GOT_TLSLD16,
1051 0, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_signed, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Like GOT_TLSLD16, but no overflow. */
1065 HOWTO (R_PPC_GOT_TLSLD16_LO,
1066 0, /* rightshift */
1067 1, /* size (0 = byte, 1 = short, 2 = long) */
1068 16, /* bitsize */
1069 FALSE, /* pc_relative */
1070 0, /* bitpos */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 ppc_elf_unhandled_reloc, /* special_function */
1073 "R_PPC_GOT_TLSLD16_LO", /* name */
1074 FALSE, /* partial_inplace */
1075 0, /* src_mask */
1076 0xffff, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1078
1079 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1080 HOWTO (R_PPC_GOT_TLSLD16_HI,
1081 16, /* rightshift */
1082 1, /* size (0 = byte, 1 = short, 2 = long) */
1083 16, /* bitsize */
1084 FALSE, /* pc_relative */
1085 0, /* bitpos */
1086 complain_overflow_dont, /* complain_on_overflow */
1087 ppc_elf_unhandled_reloc, /* special_function */
1088 "R_PPC_GOT_TLSLD16_HI", /* name */
1089 FALSE, /* partial_inplace */
1090 0, /* src_mask */
1091 0xffff, /* dst_mask */
1092 FALSE), /* pcrel_offset */
1093
1094 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1095 HOWTO (R_PPC_GOT_TLSLD16_HA,
1096 16, /* rightshift */
1097 1, /* size (0 = byte, 1 = short, 2 = long) */
1098 16, /* bitsize */
1099 FALSE, /* pc_relative */
1100 0, /* bitpos */
1101 complain_overflow_dont, /* complain_on_overflow */
1102 ppc_elf_unhandled_reloc, /* special_function */
1103 "R_PPC_GOT_TLSLD16_HA", /* name */
1104 FALSE, /* partial_inplace */
1105 0, /* src_mask */
1106 0xffff, /* dst_mask */
1107 FALSE), /* pcrel_offset */
1108
1109 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1110 the offset to the entry. */
1111 HOWTO (R_PPC_GOT_DTPREL16,
1112 0, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_signed, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Like GOT_DTPREL16, but no overflow. */
1126 HOWTO (R_PPC_GOT_DTPREL16_LO,
1127 0, /* rightshift */
1128 1, /* size (0 = byte, 1 = short, 2 = long) */
1129 16, /* bitsize */
1130 FALSE, /* pc_relative */
1131 0, /* bitpos */
1132 complain_overflow_dont, /* complain_on_overflow */
1133 ppc_elf_unhandled_reloc, /* special_function */
1134 "R_PPC_GOT_DTPREL16_LO", /* name */
1135 FALSE, /* partial_inplace */
1136 0, /* src_mask */
1137 0xffff, /* dst_mask */
1138 FALSE), /* pcrel_offset */
1139
1140 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1141 HOWTO (R_PPC_GOT_DTPREL16_HI,
1142 16, /* rightshift */
1143 1, /* size (0 = byte, 1 = short, 2 = long) */
1144 16, /* bitsize */
1145 FALSE, /* pc_relative */
1146 0, /* bitpos */
1147 complain_overflow_dont, /* complain_on_overflow */
1148 ppc_elf_unhandled_reloc, /* special_function */
1149 "R_PPC_GOT_DTPREL16_HI", /* name */
1150 FALSE, /* partial_inplace */
1151 0, /* src_mask */
1152 0xffff, /* dst_mask */
1153 FALSE), /* pcrel_offset */
1154
1155 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1156 HOWTO (R_PPC_GOT_DTPREL16_HA,
1157 16, /* rightshift */
1158 1, /* size (0 = byte, 1 = short, 2 = long) */
1159 16, /* bitsize */
1160 FALSE, /* pc_relative */
1161 0, /* bitpos */
1162 complain_overflow_dont, /* complain_on_overflow */
1163 ppc_elf_unhandled_reloc, /* special_function */
1164 "R_PPC_GOT_DTPREL16_HA", /* name */
1165 FALSE, /* partial_inplace */
1166 0, /* src_mask */
1167 0xffff, /* dst_mask */
1168 FALSE), /* pcrel_offset */
1169
1170 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1171 offset to the entry. */
1172 HOWTO (R_PPC_GOT_TPREL16,
1173 0, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_signed, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* Like GOT_TPREL16, but no overflow. */
1187 HOWTO (R_PPC_GOT_TPREL16_LO,
1188 0, /* rightshift */
1189 1, /* size (0 = byte, 1 = short, 2 = long) */
1190 16, /* bitsize */
1191 FALSE, /* pc_relative */
1192 0, /* bitpos */
1193 complain_overflow_dont, /* complain_on_overflow */
1194 ppc_elf_unhandled_reloc, /* special_function */
1195 "R_PPC_GOT_TPREL16_LO", /* name */
1196 FALSE, /* partial_inplace */
1197 0, /* src_mask */
1198 0xffff, /* dst_mask */
1199 FALSE), /* pcrel_offset */
1200
1201 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1202 HOWTO (R_PPC_GOT_TPREL16_HI,
1203 16, /* rightshift */
1204 1, /* size (0 = byte, 1 = short, 2 = long) */
1205 16, /* bitsize */
1206 FALSE, /* pc_relative */
1207 0, /* bitpos */
1208 complain_overflow_dont, /* complain_on_overflow */
1209 ppc_elf_unhandled_reloc, /* special_function */
1210 "R_PPC_GOT_TPREL16_HI", /* name */
1211 FALSE, /* partial_inplace */
1212 0, /* src_mask */
1213 0xffff, /* dst_mask */
1214 FALSE), /* pcrel_offset */
1215
1216 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1217 HOWTO (R_PPC_GOT_TPREL16_HA,
1218 16, /* rightshift */
1219 1, /* size (0 = byte, 1 = short, 2 = long) */
1220 16, /* bitsize */
1221 FALSE, /* pc_relative */
1222 0, /* bitpos */
1223 complain_overflow_dont, /* complain_on_overflow */
1224 ppc_elf_unhandled_reloc, /* special_function */
1225 "R_PPC_GOT_TPREL16_HA", /* name */
1226 FALSE, /* partial_inplace */
1227 0, /* src_mask */
1228 0xffff, /* dst_mask */
1229 FALSE), /* pcrel_offset */
1230
1231 /* The remaining relocs are from the Embedded ELF ABI, and are not
1232 in the SVR4 ELF ABI. */
1233
1234 /* 32 bit value resulting from the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR32, /* type */
1236 0, /* rightshift */
1237 2, /* size (0 = byte, 1 = short, 2 = long) */
1238 32, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 ppc_elf_unhandled_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR32", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffffffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* 16 bit value resulting from the addend minus the symbol. */
1250 HOWTO (R_PPC_EMB_NADDR16, /* type */
1251 0, /* rightshift */
1252 1, /* size (0 = byte, 1 = short, 2 = long) */
1253 16, /* bitsize */
1254 FALSE, /* pc_relative */
1255 0, /* bitpos */
1256 complain_overflow_signed, /* complain_on_overflow */
1257 ppc_elf_unhandled_reloc, /* special_function */
1258 "R_PPC_EMB_NADDR16", /* name */
1259 FALSE, /* partial_inplace */
1260 0, /* src_mask */
1261 0xffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1263
1264 /* 16 bit value resulting from the addend minus the symbol. */
1265 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1266 0, /* rightshift */
1267 1, /* size (0 = byte, 1 = short, 2 = long) */
1268 16, /* bitsize */
1269 FALSE, /* pc_relative */
1270 0, /* bitpos */
1271 complain_overflow_dont,/* complain_on_overflow */
1272 ppc_elf_unhandled_reloc, /* special_function */
1273 "R_PPC_EMB_ADDR16_LO", /* name */
1274 FALSE, /* partial_inplace */
1275 0, /* src_mask */
1276 0xffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1278
1279 /* The high order 16 bits of the addend minus the symbol. */
1280 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1281 16, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_dont, /* complain_on_overflow */
1287 ppc_elf_unhandled_reloc, /* special_function */
1288 "R_PPC_EMB_NADDR16_HI", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* The high order 16 bits of the result of the addend minus the address,
1295 plus 1 if the contents of the low 16 bits, treated as a signed number,
1296 is negative. */
1297 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1298 16, /* rightshift */
1299 1, /* size (0 = byte, 1 = short, 2 = long) */
1300 16, /* bitsize */
1301 FALSE, /* pc_relative */
1302 0, /* bitpos */
1303 complain_overflow_dont, /* complain_on_overflow */
1304 ppc_elf_unhandled_reloc, /* special_function */
1305 "R_PPC_EMB_NADDR16_HA", /* name */
1306 FALSE, /* partial_inplace */
1307 0, /* src_mask */
1308 0xffff, /* dst_mask */
1309 FALSE), /* pcrel_offset */
1310
1311 /* 16 bit value resulting from allocating a 4 byte word to hold an
1312 address in the .sdata section, and returning the offset from
1313 _SDA_BASE_ for that relocation. */
1314 HOWTO (R_PPC_EMB_SDAI16, /* type */
1315 0, /* rightshift */
1316 1, /* size (0 = byte, 1 = short, 2 = long) */
1317 16, /* bitsize */
1318 FALSE, /* pc_relative */
1319 0, /* bitpos */
1320 complain_overflow_signed, /* complain_on_overflow */
1321 ppc_elf_unhandled_reloc, /* special_function */
1322 "R_PPC_EMB_SDAI16", /* name */
1323 FALSE, /* partial_inplace */
1324 0, /* src_mask */
1325 0xffff, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1327
1328 /* 16 bit value resulting from allocating a 4 byte word to hold an
1329 address in the .sdata2 section, and returning the offset from
1330 _SDA2_BASE_ for that relocation. */
1331 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1332 0, /* rightshift */
1333 1, /* size (0 = byte, 1 = short, 2 = long) */
1334 16, /* bitsize */
1335 FALSE, /* pc_relative */
1336 0, /* bitpos */
1337 complain_overflow_signed, /* complain_on_overflow */
1338 ppc_elf_unhandled_reloc, /* special_function */
1339 "R_PPC_EMB_SDA2I16", /* name */
1340 FALSE, /* partial_inplace */
1341 0, /* src_mask */
1342 0xffff, /* dst_mask */
1343 FALSE), /* pcrel_offset */
1344
1345 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1346 small data items. */
1347 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1348 0, /* rightshift */
1349 1, /* size (0 = byte, 1 = short, 2 = long) */
1350 16, /* bitsize */
1351 FALSE, /* pc_relative */
1352 0, /* bitpos */
1353 complain_overflow_signed, /* complain_on_overflow */
1354 ppc_elf_unhandled_reloc, /* special_function */
1355 "R_PPC_EMB_SDA2REL", /* name */
1356 FALSE, /* partial_inplace */
1357 0, /* src_mask */
1358 0xffff, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1360
1361 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1362 signed offset from the appropriate base, and filling in the register
1363 field with the appropriate register (0, 2, or 13). */
1364 HOWTO (R_PPC_EMB_SDA21, /* type */
1365 0, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1367 16, /* bitsize */
1368 FALSE, /* pc_relative */
1369 0, /* bitpos */
1370 complain_overflow_signed, /* complain_on_overflow */
1371 ppc_elf_unhandled_reloc, /* special_function */
1372 "R_PPC_EMB_SDA21", /* name */
1373 FALSE, /* partial_inplace */
1374 0, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1377
1378 /* Relocation not handled: R_PPC_EMB_MRKREF */
1379 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1380 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1381 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1382 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1383 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1384
1385 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1386 in the 16 bit signed offset from the appropriate base, and filling in the
1387 register field with the appropriate register (0, 2, or 13). */
1388 HOWTO (R_PPC_EMB_RELSDA, /* type */
1389 0, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 FALSE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_signed, /* complain_on_overflow */
1395 ppc_elf_unhandled_reloc, /* special_function */
1396 "R_PPC_EMB_RELSDA", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 FALSE), /* pcrel_offset */
1401
1402 /* A relative 8 bit branch. */
1403 HOWTO (R_PPC_VLE_REL8, /* type */
1404 1, /* rightshift */
1405 1, /* size (0 = byte, 1 = short, 2 = long) */
1406 8, /* bitsize */
1407 TRUE, /* pc_relative */
1408 0, /* bitpos */
1409 complain_overflow_signed, /* complain_on_overflow */
1410 bfd_elf_generic_reloc, /* special_function */
1411 "R_PPC_VLE_REL8", /* name */
1412 FALSE, /* partial_inplace */
1413 0, /* src_mask */
1414 0xff, /* dst_mask */
1415 TRUE), /* pcrel_offset */
1416
1417 /* A relative 15 bit branch. */
1418 HOWTO (R_PPC_VLE_REL15, /* type */
1419 1, /* rightshift */
1420 2, /* size (0 = byte, 1 = short, 2 = long) */
1421 15, /* bitsize */
1422 TRUE, /* pc_relative */
1423 1, /* bitpos */
1424 complain_overflow_signed, /* complain_on_overflow */
1425 bfd_elf_generic_reloc, /* special_function */
1426 "R_PPC_VLE_REL15", /* name */
1427 FALSE, /* partial_inplace */
1428 0, /* src_mask */
1429 0xfffe, /* dst_mask */
1430 TRUE), /* pcrel_offset */
1431
1432 /* A relative 24 bit branch. */
1433 HOWTO (R_PPC_VLE_REL24, /* type */
1434 1, /* rightshift */
1435 2, /* size (0 = byte, 1 = short, 2 = long) */
1436 24, /* bitsize */
1437 TRUE, /* pc_relative */
1438 1, /* bitpos */
1439 complain_overflow_signed, /* complain_on_overflow */
1440 bfd_elf_generic_reloc, /* special_function */
1441 "R_PPC_VLE_REL24", /* name */
1442 FALSE, /* partial_inplace */
1443 0, /* src_mask */
1444 0x1fffffe, /* dst_mask */
1445 TRUE), /* pcrel_offset */
1446
1447 /* The 16 LSBS in split16a format. */
1448 HOWTO (R_PPC_VLE_LO16A, /* type */
1449 0, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1451 16, /* bitsize */
1452 FALSE, /* pc_relative */
1453 0, /* bitpos */
1454 complain_overflow_dont, /* complain_on_overflow */
1455 ppc_elf_unhandled_reloc, /* special_function */
1456 "R_PPC_VLE_LO16A", /* name */
1457 FALSE, /* partial_inplace */
1458 0, /* src_mask */
1459 0x1f07ff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1461
1462 /* The 16 LSBS in split16d format. */
1463 HOWTO (R_PPC_VLE_LO16D, /* type */
1464 0, /* rightshift */
1465 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 16, /* bitsize */
1467 FALSE, /* pc_relative */
1468 0, /* bitpos */
1469 complain_overflow_dont, /* complain_on_overflow */
1470 ppc_elf_unhandled_reloc, /* special_function */
1471 "R_PPC_VLE_LO16D", /* name */
1472 FALSE, /* partial_inplace */
1473 0, /* src_mask */
1474 0x3e007ff, /* dst_mask */
1475 FALSE), /* pcrel_offset */
1476
1477 /* Bits 16-31 split16a format. */
1478 HOWTO (R_PPC_VLE_HI16A, /* type */
1479 16, /* rightshift */
1480 2, /* size (0 = byte, 1 = short, 2 = long) */
1481 16, /* bitsize */
1482 FALSE, /* pc_relative */
1483 0, /* bitpos */
1484 complain_overflow_dont, /* complain_on_overflow */
1485 ppc_elf_unhandled_reloc, /* special_function */
1486 "R_PPC_VLE_HI16A", /* name */
1487 FALSE, /* partial_inplace */
1488 0, /* src_mask */
1489 0x1f07ff, /* dst_mask */
1490 FALSE), /* pcrel_offset */
1491
1492 /* Bits 16-31 split16d format. */
1493 HOWTO (R_PPC_VLE_HI16D, /* type */
1494 16, /* rightshift */
1495 2, /* size (0 = byte, 1 = short, 2 = long) */
1496 16, /* bitsize */
1497 FALSE, /* pc_relative */
1498 0, /* bitpos */
1499 complain_overflow_dont, /* complain_on_overflow */
1500 ppc_elf_unhandled_reloc, /* special_function */
1501 "R_PPC_VLE_HI16D", /* name */
1502 FALSE, /* partial_inplace */
1503 0, /* src_mask */
1504 0x3e007ff, /* dst_mask */
1505 FALSE), /* pcrel_offset */
1506
1507 /* Bits 16-31 (High Adjusted) in split16a format. */
1508 HOWTO (R_PPC_VLE_HA16A, /* type */
1509 16, /* rightshift */
1510 2, /* size (0 = byte, 1 = short, 2 = long) */
1511 16, /* bitsize */
1512 FALSE, /* pc_relative */
1513 0, /* bitpos */
1514 complain_overflow_dont, /* complain_on_overflow */
1515 ppc_elf_unhandled_reloc, /* special_function */
1516 "R_PPC_VLE_HA16A", /* name */
1517 FALSE, /* partial_inplace */
1518 0, /* src_mask */
1519 0x1f07ff, /* dst_mask */
1520 FALSE), /* pcrel_offset */
1521
1522 /* Bits 16-31 (High Adjusted) in split16d format. */
1523 HOWTO (R_PPC_VLE_HA16D, /* type */
1524 16, /* rightshift */
1525 2, /* size (0 = byte, 1 = short, 2 = long) */
1526 16, /* bitsize */
1527 FALSE, /* pc_relative */
1528 0, /* bitpos */
1529 complain_overflow_dont, /* complain_on_overflow */
1530 ppc_elf_unhandled_reloc, /* special_function */
1531 "R_PPC_VLE_HA16D", /* name */
1532 FALSE, /* partial_inplace */
1533 0, /* src_mask */
1534 0x3e007ff, /* dst_mask */
1535 FALSE), /* pcrel_offset */
1536
1537 /* This reloc is like R_PPC_EMB_SDA21 but only applies to e_add16i
1538 instructions. If the register base is 0 then the linker changes
1539 the e_add16i to an e_li instruction. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 16, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_signed, /* complain_on_overflow */
1547 ppc_elf_unhandled_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* Like R_PPC_VLE_SDA21 but ignore overflow. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 16, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_dont, /* complain_on_overflow */
1562 ppc_elf_unhandled_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0xffff, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 16, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_dont, /* complain_on_overflow */
1577 ppc_elf_unhandled_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f07ff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1586 0, /* rightshift */
1587 2, /* size (0 = byte, 1 = short, 2 = long) */
1588 16, /* bitsize */
1589 FALSE, /* pc_relative */
1590 0, /* bitpos */
1591 complain_overflow_dont, /* complain_on_overflow */
1592 ppc_elf_unhandled_reloc, /* special_function */
1593 "R_PPC_VLE_SDAREL_LO16D", /* name */
1594 FALSE, /* partial_inplace */
1595 0, /* src_mask */
1596 0x3e007ff, /* dst_mask */
1597 FALSE), /* pcrel_offset */
1598
1599 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1600 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1601 16, /* rightshift */
1602 2, /* size (0 = byte, 1 = short, 2 = long) */
1603 16, /* bitsize */
1604 FALSE, /* pc_relative */
1605 0, /* bitpos */
1606 complain_overflow_dont, /* complain_on_overflow */
1607 ppc_elf_unhandled_reloc, /* special_function */
1608 "R_PPC_VLE_SDAREL_HI16A", /* name */
1609 FALSE, /* partial_inplace */
1610 0, /* src_mask */
1611 0x1f07ff, /* dst_mask */
1612 FALSE), /* pcrel_offset */
1613
1614 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1615 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1616 16, /* rightshift */
1617 2, /* size (0 = byte, 1 = short, 2 = long) */
1618 16, /* bitsize */
1619 FALSE, /* pc_relative */
1620 0, /* bitpos */
1621 complain_overflow_dont, /* complain_on_overflow */
1622 ppc_elf_unhandled_reloc, /* special_function */
1623 "R_PPC_VLE_SDAREL_HI16D", /* name */
1624 FALSE, /* partial_inplace */
1625 0, /* src_mask */
1626 0x3e007ff, /* dst_mask */
1627 FALSE), /* pcrel_offset */
1628
1629 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1630 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1631 16, /* rightshift */
1632 2, /* size (0 = byte, 1 = short, 2 = long) */
1633 16, /* bitsize */
1634 FALSE, /* pc_relative */
1635 0, /* bitpos */
1636 complain_overflow_dont, /* complain_on_overflow */
1637 ppc_elf_unhandled_reloc, /* special_function */
1638 "R_PPC_VLE_SDAREL_HA16A", /* name */
1639 FALSE, /* partial_inplace */
1640 0, /* src_mask */
1641 0x1f07ff, /* dst_mask */
1642 FALSE), /* pcrel_offset */
1643
1644 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1645 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1646 16, /* rightshift */
1647 2, /* size (0 = byte, 1 = short, 2 = long) */
1648 16, /* bitsize */
1649 FALSE, /* pc_relative */
1650 0, /* bitpos */
1651 complain_overflow_dont, /* complain_on_overflow */
1652 ppc_elf_unhandled_reloc, /* special_function */
1653 "R_PPC_VLE_SDAREL_HA16D", /* name */
1654 FALSE, /* partial_inplace */
1655 0, /* src_mask */
1656 0x3e007ff, /* dst_mask */
1657 FALSE), /* pcrel_offset */
1658
1659 HOWTO (R_PPC_IRELATIVE, /* type */
1660 0, /* rightshift */
1661 2, /* size (0 = byte, 1 = short, 2 = long) */
1662 32, /* bitsize */
1663 FALSE, /* pc_relative */
1664 0, /* bitpos */
1665 complain_overflow_dont, /* complain_on_overflow */
1666 ppc_elf_unhandled_reloc, /* special_function */
1667 "R_PPC_IRELATIVE", /* name */
1668 FALSE, /* partial_inplace */
1669 0, /* src_mask */
1670 0xffffffff, /* dst_mask */
1671 FALSE), /* pcrel_offset */
1672
1673 /* A 16 bit relative relocation. */
1674 HOWTO (R_PPC_REL16, /* type */
1675 0, /* rightshift */
1676 1, /* size (0 = byte, 1 = short, 2 = long) */
1677 16, /* bitsize */
1678 TRUE, /* pc_relative */
1679 0, /* bitpos */
1680 complain_overflow_signed, /* complain_on_overflow */
1681 bfd_elf_generic_reloc, /* special_function */
1682 "R_PPC_REL16", /* name */
1683 FALSE, /* partial_inplace */
1684 0, /* src_mask */
1685 0xffff, /* dst_mask */
1686 TRUE), /* pcrel_offset */
1687
1688 /* A 16 bit relative relocation without overflow. */
1689 HOWTO (R_PPC_REL16_LO, /* type */
1690 0, /* rightshift */
1691 1, /* size (0 = byte, 1 = short, 2 = long) */
1692 16, /* bitsize */
1693 TRUE, /* pc_relative */
1694 0, /* bitpos */
1695 complain_overflow_dont,/* complain_on_overflow */
1696 bfd_elf_generic_reloc, /* special_function */
1697 "R_PPC_REL16_LO", /* name */
1698 FALSE, /* partial_inplace */
1699 0, /* src_mask */
1700 0xffff, /* dst_mask */
1701 TRUE), /* pcrel_offset */
1702
1703 /* The high order 16 bits of a relative address. */
1704 HOWTO (R_PPC_REL16_HI, /* type */
1705 16, /* rightshift */
1706 1, /* size (0 = byte, 1 = short, 2 = long) */
1707 16, /* bitsize */
1708 TRUE, /* pc_relative */
1709 0, /* bitpos */
1710 complain_overflow_dont, /* complain_on_overflow */
1711 bfd_elf_generic_reloc, /* special_function */
1712 "R_PPC_REL16_HI", /* name */
1713 FALSE, /* partial_inplace */
1714 0, /* src_mask */
1715 0xffff, /* dst_mask */
1716 TRUE), /* pcrel_offset */
1717
1718 /* The high order 16 bits of a relative address, plus 1 if the contents of
1719 the low 16 bits, treated as a signed number, is negative. */
1720 HOWTO (R_PPC_REL16_HA, /* type */
1721 16, /* rightshift */
1722 1, /* size (0 = byte, 1 = short, 2 = long) */
1723 16, /* bitsize */
1724 TRUE, /* pc_relative */
1725 0, /* bitpos */
1726 complain_overflow_dont, /* complain_on_overflow */
1727 ppc_elf_addr16_ha_reloc, /* special_function */
1728 "R_PPC_REL16_HA", /* name */
1729 FALSE, /* partial_inplace */
1730 0, /* src_mask */
1731 0xffff, /* dst_mask */
1732 TRUE), /* pcrel_offset */
1733
1734 /* Like R_PPC_REL16_HA but for split field in addpcis. */
1735 HOWTO (R_PPC_REL16DX_HA, /* type */
1736 16, /* rightshift */
1737 2, /* size (0 = byte, 1 = short, 2 = long) */
1738 16, /* bitsize */
1739 TRUE, /* pc_relative */
1740 0, /* bitpos */
1741 complain_overflow_signed, /* complain_on_overflow */
1742 ppc_elf_addr16_ha_reloc, /* special_function */
1743 "R_PPC_REL16DX_HA", /* name */
1744 FALSE, /* partial_inplace */
1745 0, /* src_mask */
1746 0x1fffc1, /* dst_mask */
1747 TRUE), /* pcrel_offset */
1748
1749 /* A split-field reloc for addpcis, non-relative (gas internal use only). */
1750 HOWTO (R_PPC_16DX_HA, /* type */
1751 16, /* rightshift */
1752 2, /* size (0 = byte, 1 = short, 2 = long) */
1753 16, /* bitsize */
1754 FALSE, /* pc_relative */
1755 0, /* bitpos */
1756 complain_overflow_signed, /* complain_on_overflow */
1757 ppc_elf_addr16_ha_reloc, /* special_function */
1758 "R_PPC_16DX_HA", /* name */
1759 FALSE, /* partial_inplace */
1760 0, /* src_mask */
1761 0x1fffc1, /* dst_mask */
1762 FALSE), /* pcrel_offset */
1763
1764 /* GNU extension to record C++ vtable hierarchy. */
1765 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1766 0, /* rightshift */
1767 0, /* size (0 = byte, 1 = short, 2 = long) */
1768 0, /* bitsize */
1769 FALSE, /* pc_relative */
1770 0, /* bitpos */
1771 complain_overflow_dont, /* complain_on_overflow */
1772 NULL, /* special_function */
1773 "R_PPC_GNU_VTINHERIT", /* name */
1774 FALSE, /* partial_inplace */
1775 0, /* src_mask */
1776 0, /* dst_mask */
1777 FALSE), /* pcrel_offset */
1778
1779 /* GNU extension to record C++ vtable member usage. */
1780 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1781 0, /* rightshift */
1782 0, /* size (0 = byte, 1 = short, 2 = long) */
1783 0, /* bitsize */
1784 FALSE, /* pc_relative */
1785 0, /* bitpos */
1786 complain_overflow_dont, /* complain_on_overflow */
1787 NULL, /* special_function */
1788 "R_PPC_GNU_VTENTRY", /* name */
1789 FALSE, /* partial_inplace */
1790 0, /* src_mask */
1791 0, /* dst_mask */
1792 FALSE), /* pcrel_offset */
1793
1794 /* Phony reloc to handle AIX style TOC entries. */
1795 HOWTO (R_PPC_TOC16, /* type */
1796 0, /* rightshift */
1797 1, /* size (0 = byte, 1 = short, 2 = long) */
1798 16, /* bitsize */
1799 FALSE, /* pc_relative */
1800 0, /* bitpos */
1801 complain_overflow_signed, /* complain_on_overflow */
1802 ppc_elf_unhandled_reloc, /* special_function */
1803 "R_PPC_TOC16", /* name */
1804 FALSE, /* partial_inplace */
1805 0, /* src_mask */
1806 0xffff, /* dst_mask */
1807 FALSE), /* pcrel_offset */
1808 };
1809
1810 /* External 32-bit PPC structure for PRPSINFO. This structure is
1811 ABI-defined, thus we choose to use char arrays here in order to
1812 avoid dealing with different types in different architectures.
1813
1814 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1815 most non-PPC architectures use `short int'.
1816
1817 This structure will ultimately be written in the corefile's note
1818 section, as the PRPSINFO. */
1819
1820 struct elf_external_ppc_linux_prpsinfo32
1821 {
1822 char pr_state; /* Numeric process state. */
1823 char pr_sname; /* Char for pr_state. */
1824 char pr_zomb; /* Zombie. */
1825 char pr_nice; /* Nice val. */
1826 char pr_flag[4]; /* Flags. */
1827 char pr_uid[4];
1828 char pr_gid[4];
1829 char pr_pid[4];
1830 char pr_ppid[4];
1831 char pr_pgrp[4];
1832 char pr_sid[4];
1833 char pr_fname[16]; /* Filename of executable. */
1834 char pr_psargs[80]; /* Initial part of arg list. */
1835 };
1836
1837 /* Helper function to copy an elf_internal_linux_prpsinfo in host
1838 endian to an elf_external_ppc_linux_prpsinfo32 in target endian. */
1839
1840 static inline void
1841 swap_ppc_linux_prpsinfo32_out (bfd *obfd,
1842 const struct elf_internal_linux_prpsinfo *from,
1843 struct elf_external_ppc_linux_prpsinfo32 *to)
1844 {
1845 bfd_put_8 (obfd, from->pr_state, &to->pr_state);
1846 bfd_put_8 (obfd, from->pr_sname, &to->pr_sname);
1847 bfd_put_8 (obfd, from->pr_zomb, &to->pr_zomb);
1848 bfd_put_8 (obfd, from->pr_nice, &to->pr_nice);
1849 bfd_put_32 (obfd, from->pr_flag, to->pr_flag);
1850 bfd_put_32 (obfd, from->pr_uid, to->pr_uid);
1851 bfd_put_32 (obfd, from->pr_gid, to->pr_gid);
1852 bfd_put_32 (obfd, from->pr_pid, to->pr_pid);
1853 bfd_put_32 (obfd, from->pr_ppid, to->pr_ppid);
1854 bfd_put_32 (obfd, from->pr_pgrp, to->pr_pgrp);
1855 bfd_put_32 (obfd, from->pr_sid, to->pr_sid);
1856 strncpy (to->pr_fname, from->pr_fname, sizeof (to->pr_fname));
1857 strncpy (to->pr_psargs, from->pr_psargs, sizeof (to->pr_psargs));
1858 }
1859 \f
1860 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1861
1862 static void
1863 ppc_elf_howto_init (void)
1864 {
1865 unsigned int i, type;
1866
1867 for (i = 0;
1868 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1869 i++)
1870 {
1871 type = ppc_elf_howto_raw[i].type;
1872 if (type >= (sizeof (ppc_elf_howto_table)
1873 / sizeof (ppc_elf_howto_table[0])))
1874 abort ();
1875 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1876 }
1877 }
1878
1879 static reloc_howto_type *
1880 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1881 bfd_reloc_code_real_type code)
1882 {
1883 enum elf_ppc_reloc_type r;
1884
1885 /* Initialize howto table if not already done. */
1886 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1887 ppc_elf_howto_init ();
1888
1889 switch (code)
1890 {
1891 default:
1892 return NULL;
1893
1894 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1895 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1896 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1897 case BFD_RELOC_PPC64_ADDR16_DS:
1898 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1899 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1900 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1901 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1902 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1903 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1904 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1905 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1906 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1907 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1908 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1909 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1910 case BFD_RELOC_PPC64_GOT16_DS:
1911 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1912 case BFD_RELOC_PPC64_GOT16_LO_DS:
1913 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1914 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1915 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1916 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1917 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1918 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1919 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1920 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1921 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1922 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1923 case BFD_RELOC_PPC64_PLT16_LO_DS:
1924 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1925 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1926 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1927 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1928 case BFD_RELOC_PPC64_SECTOFF_DS:
1929 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1930 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1931 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1932 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1933 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1934 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1935 case BFD_RELOC_PPC64_TOC16_DS:
1936 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1937 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1938 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1939 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1940 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1941 case BFD_RELOC_PPC64_TPREL16_DS:
1942 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1943 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1944 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1945 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1946 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1947 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1948 case BFD_RELOC_PPC64_DTPREL16_DS:
1949 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1950 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1951 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1952 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1953 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1954 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1955 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1956 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1957 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1958 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1959 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1960 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1961 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1962 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1963 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1964 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1965 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1966 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1967 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1968 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1969 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1970 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1971 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1972 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1973 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1974 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1975 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1976 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1977 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1978 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1979 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1980 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1981 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1982 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1983 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1984 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1985 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1986 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1987 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1988 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1989 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1990 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1991 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1992 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1993 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1994 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1995 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1996 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1997 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1998 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1999 r = R_PPC_VLE_SDAREL_LO16A;
2000 break;
2001 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
2002 r = R_PPC_VLE_SDAREL_LO16D;
2003 break;
2004 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
2005 r = R_PPC_VLE_SDAREL_HI16A;
2006 break;
2007 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
2008 r = R_PPC_VLE_SDAREL_HI16D;
2009 break;
2010 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
2011 r = R_PPC_VLE_SDAREL_HA16A;
2012 break;
2013 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
2014 r = R_PPC_VLE_SDAREL_HA16D;
2015 break;
2016 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
2017 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
2018 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
2019 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
2020 case BFD_RELOC_PPC_16DX_HA: r = R_PPC_16DX_HA; break;
2021 case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC_REL16DX_HA; break;
2022 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
2023 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
2024 }
2025
2026 return ppc_elf_howto_table[r];
2027 };
2028
2029 static reloc_howto_type *
2030 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2031 const char *r_name)
2032 {
2033 unsigned int i;
2034
2035 for (i = 0;
2036 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2037 i++)
2038 if (ppc_elf_howto_raw[i].name != NULL
2039 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2040 return &ppc_elf_howto_raw[i];
2041
2042 return NULL;
2043 }
2044
2045 /* Set the howto pointer for a PowerPC ELF reloc. */
2046
2047 static void
2048 ppc_elf_info_to_howto (bfd *abfd,
2049 arelent *cache_ptr,
2050 Elf_Internal_Rela *dst)
2051 {
2052 unsigned int r_type;
2053
2054 /* Initialize howto table if not already done. */
2055 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2056 ppc_elf_howto_init ();
2057
2058 r_type = ELF32_R_TYPE (dst->r_info);
2059 if (r_type >= R_PPC_max)
2060 {
2061 /* xgettext:c-format */
2062 _bfd_error_handler (_("%B: unrecognised PPC reloc number: %d"),
2063 abfd, r_type);
2064 bfd_set_error (bfd_error_bad_value);
2065 r_type = R_PPC_NONE;
2066 }
2067 cache_ptr->howto = ppc_elf_howto_table[r_type];
2068
2069 /* Just because the above assert didn't trigger doesn't mean that
2070 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2071 if (!cache_ptr->howto)
2072 {
2073 /* xgettext:c-format */
2074 _bfd_error_handler (_("%B: invalid relocation type %d"),
2075 abfd, r_type);
2076 bfd_set_error (bfd_error_bad_value);
2077
2078 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2079 }
2080 }
2081
2082 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2083
2084 static bfd_reloc_status_type
2085 ppc_elf_addr16_ha_reloc (bfd *abfd,
2086 arelent *reloc_entry,
2087 asymbol *symbol,
2088 void *data,
2089 asection *input_section,
2090 bfd *output_bfd,
2091 char **error_message ATTRIBUTE_UNUSED)
2092 {
2093 enum elf_ppc_reloc_type r_type;
2094 long insn;
2095 bfd_size_type octets;
2096 bfd_vma value;
2097
2098 if (output_bfd != NULL)
2099 {
2100 reloc_entry->address += input_section->output_offset;
2101 return bfd_reloc_ok;
2102 }
2103
2104 reloc_entry->addend += 0x8000;
2105 r_type = reloc_entry->howto->type;
2106 if (r_type != R_PPC_REL16DX_HA)
2107 return bfd_reloc_continue;
2108
2109 value = 0;
2110 if (!bfd_is_com_section (symbol->section))
2111 value = symbol->value;
2112 value += (reloc_entry->addend
2113 + symbol->section->output_offset
2114 + symbol->section->output_section->vma);
2115 value -= (reloc_entry->address
2116 + input_section->output_offset
2117 + input_section->output_section->vma);
2118 value >>= 16;
2119
2120 octets = reloc_entry->address * bfd_octets_per_byte (abfd);
2121 insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
2122 insn &= ~0x1fffc1;
2123 insn |= (value & 0xffc1) | ((value & 0x3e) << 15);
2124 bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
2125 return bfd_reloc_ok;
2126 }
2127
2128 static bfd_reloc_status_type
2129 ppc_elf_unhandled_reloc (bfd *abfd,
2130 arelent *reloc_entry,
2131 asymbol *symbol,
2132 void *data,
2133 asection *input_section,
2134 bfd *output_bfd,
2135 char **error_message)
2136 {
2137 /* If this is a relocatable link (output_bfd test tells us), just
2138 call the generic function. Any adjustment will be done at final
2139 link time. */
2140 if (output_bfd != NULL)
2141 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2142 input_section, output_bfd, error_message);
2143
2144 if (error_message != NULL)
2145 {
2146 static char buf[60];
2147 sprintf (buf, _("generic linker can't handle %s"),
2148 reloc_entry->howto->name);
2149 *error_message = buf;
2150 }
2151 return bfd_reloc_dangerous;
2152 }
2153 \f
2154 /* Sections created by the linker. */
2155
2156 typedef struct elf_linker_section
2157 {
2158 /* Pointer to the bfd section. */
2159 asection *section;
2160 /* Section name. */
2161 const char *name;
2162 /* Associated bss section name. */
2163 const char *bss_name;
2164 /* Associated symbol name. */
2165 const char *sym_name;
2166 /* Associated symbol. */
2167 struct elf_link_hash_entry *sym;
2168 } elf_linker_section_t;
2169
2170 /* Linked list of allocated pointer entries. This hangs off of the
2171 symbol lists, and provides allows us to return different pointers,
2172 based on different addend's. */
2173
2174 typedef struct elf_linker_section_pointers
2175 {
2176 /* next allocated pointer for this symbol */
2177 struct elf_linker_section_pointers *next;
2178 /* offset of pointer from beginning of section */
2179 bfd_vma offset;
2180 /* addend used */
2181 bfd_vma addend;
2182 /* which linker section this is */
2183 elf_linker_section_t *lsect;
2184 } elf_linker_section_pointers_t;
2185
2186 struct ppc_elf_obj_tdata
2187 {
2188 struct elf_obj_tdata elf;
2189
2190 /* A mapping from local symbols to offsets into the various linker
2191 sections added. This is index by the symbol index. */
2192 elf_linker_section_pointers_t **linker_section_pointers;
2193
2194 /* Flags used to auto-detect plt type. */
2195 unsigned int makes_plt_call : 1;
2196 unsigned int has_rel16 : 1;
2197 };
2198
2199 #define ppc_elf_tdata(bfd) \
2200 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2201
2202 #define elf_local_ptr_offsets(bfd) \
2203 (ppc_elf_tdata (bfd)->linker_section_pointers)
2204
2205 #define is_ppc_elf(bfd) \
2206 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2207 && elf_object_id (bfd) == PPC32_ELF_DATA)
2208
2209 /* Override the generic function because we store some extras. */
2210
2211 static bfd_boolean
2212 ppc_elf_mkobject (bfd *abfd)
2213 {
2214 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2215 PPC32_ELF_DATA);
2216 }
2217
2218 /* When defaulting arch/mach, decode apuinfo to find a better match. */
2219
2220 bfd_boolean
2221 _bfd_elf_ppc_set_arch (bfd *abfd)
2222 {
2223 unsigned long mach = 0;
2224 asection *s;
2225 unsigned char *contents;
2226
2227 if (abfd->arch_info->bits_per_word == 32
2228 && bfd_big_endian (abfd))
2229 {
2230
2231 for (s = abfd->sections; s != NULL; s = s->next)
2232 if ((elf_section_data (s)->this_hdr.sh_flags & SHF_PPC_VLE) != 0)
2233 break;
2234 if (s != NULL)
2235 mach = bfd_mach_ppc_vle;
2236 }
2237
2238 if (mach == 0)
2239 {
2240 s = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2241 if (s != NULL && bfd_malloc_and_get_section (abfd, s, &contents))
2242 {
2243 unsigned int apuinfo_size = bfd_get_32 (abfd, contents + 4);
2244 unsigned int i;
2245
2246 for (i = 20; i < apuinfo_size + 20 && i + 4 <= s->size; i += 4)
2247 {
2248 unsigned int val = bfd_get_32 (abfd, contents + i);
2249 switch (val >> 16)
2250 {
2251 case PPC_APUINFO_PMR:
2252 case PPC_APUINFO_RFMCI:
2253 if (mach == 0)
2254 mach = bfd_mach_ppc_titan;
2255 break;
2256
2257 case PPC_APUINFO_ISEL:
2258 case PPC_APUINFO_CACHELCK:
2259 if (mach == bfd_mach_ppc_titan)
2260 mach = bfd_mach_ppc_e500mc;
2261 break;
2262
2263 case PPC_APUINFO_SPE:
2264 case PPC_APUINFO_EFS:
2265 case PPC_APUINFO_BRLOCK:
2266 if (mach != bfd_mach_ppc_vle)
2267 mach = bfd_mach_ppc_e500;
2268 break;
2269
2270 case PPC_APUINFO_VLE:
2271 mach = bfd_mach_ppc_vle;
2272 break;
2273
2274 default:
2275 mach = -1ul;
2276 }
2277 }
2278 free (contents);
2279 }
2280 }
2281
2282 if (mach != 0 && mach != -1ul)
2283 {
2284 const bfd_arch_info_type *arch;
2285
2286 for (arch = abfd->arch_info->next; arch; arch = arch->next)
2287 if (arch->mach == mach)
2288 {
2289 abfd->arch_info = arch;
2290 break;
2291 }
2292 }
2293 return TRUE;
2294 }
2295
2296 /* Fix bad default arch selected for a 32 bit input bfd when the
2297 default is 64 bit. Also select arch based on apuinfo. */
2298
2299 static bfd_boolean
2300 ppc_elf_object_p (bfd *abfd)
2301 {
2302 if (!abfd->arch_info->the_default)
2303 return TRUE;
2304
2305 if (abfd->arch_info->bits_per_word == 64)
2306 {
2307 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2308
2309 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2310 {
2311 /* Relies on arch after 64 bit default being 32 bit default. */
2312 abfd->arch_info = abfd->arch_info->next;
2313 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2314 }
2315 }
2316 return _bfd_elf_ppc_set_arch (abfd);
2317 }
2318
2319 /* Function to set whether a module needs the -mrelocatable bit set. */
2320
2321 static bfd_boolean
2322 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2323 {
2324 BFD_ASSERT (!elf_flags_init (abfd)
2325 || elf_elfheader (abfd)->e_flags == flags);
2326
2327 elf_elfheader (abfd)->e_flags = flags;
2328 elf_flags_init (abfd) = TRUE;
2329 return TRUE;
2330 }
2331
2332 /* Support for core dump NOTE sections. */
2333
2334 static bfd_boolean
2335 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2336 {
2337 int offset;
2338 unsigned int size;
2339
2340 switch (note->descsz)
2341 {
2342 default:
2343 return FALSE;
2344
2345 case 268: /* Linux/PPC. */
2346 /* pr_cursig */
2347 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2348
2349 /* pr_pid */
2350 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2351
2352 /* pr_reg */
2353 offset = 72;
2354 size = 192;
2355
2356 break;
2357 }
2358
2359 /* Make a ".reg/999" section. */
2360 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2361 size, note->descpos + offset);
2362 }
2363
2364 static bfd_boolean
2365 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2366 {
2367 switch (note->descsz)
2368 {
2369 default:
2370 return FALSE;
2371
2372 case 128: /* Linux/PPC elf_prpsinfo. */
2373 elf_tdata (abfd)->core->pid
2374 = bfd_get_32 (abfd, note->descdata + 16);
2375 elf_tdata (abfd)->core->program
2376 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2377 elf_tdata (abfd)->core->command
2378 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2379 }
2380
2381 /* Note that for some reason, a spurious space is tacked
2382 onto the end of the args in some (at least one anyway)
2383 implementations, so strip it off if it exists. */
2384
2385 {
2386 char *command = elf_tdata (abfd)->core->command;
2387 int n = strlen (command);
2388
2389 if (0 < n && command[n - 1] == ' ')
2390 command[n - 1] = '\0';
2391 }
2392
2393 return TRUE;
2394 }
2395
2396 char *
2397 elfcore_write_ppc_linux_prpsinfo32
2398 (bfd *abfd,
2399 char *buf,
2400 int *bufsiz,
2401 const struct elf_internal_linux_prpsinfo *prpsinfo)
2402 {
2403 struct elf_external_ppc_linux_prpsinfo32 data;
2404
2405 swap_ppc_linux_prpsinfo32_out (abfd, prpsinfo, &data);
2406 return elfcore_write_note (abfd, buf, bufsiz,
2407 "CORE", NT_PRPSINFO, &data, sizeof (data));
2408 }
2409
2410 static char *
2411 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2412 {
2413 switch (note_type)
2414 {
2415 default:
2416 return NULL;
2417
2418 case NT_PRPSINFO:
2419 {
2420 char data[128];
2421 va_list ap;
2422
2423 va_start (ap, note_type);
2424 memset (data, 0, sizeof (data));
2425 strncpy (data + 32, va_arg (ap, const char *), 16);
2426 strncpy (data + 48, va_arg (ap, const char *), 80);
2427 va_end (ap);
2428 return elfcore_write_note (abfd, buf, bufsiz,
2429 "CORE", note_type, data, sizeof (data));
2430 }
2431
2432 case NT_PRSTATUS:
2433 {
2434 char data[268];
2435 va_list ap;
2436 long pid;
2437 int cursig;
2438 const void *greg;
2439
2440 va_start (ap, note_type);
2441 memset (data, 0, 72);
2442 pid = va_arg (ap, long);
2443 bfd_put_32 (abfd, pid, data + 24);
2444 cursig = va_arg (ap, int);
2445 bfd_put_16 (abfd, cursig, data + 12);
2446 greg = va_arg (ap, const void *);
2447 memcpy (data + 72, greg, 192);
2448 memset (data + 264, 0, 4);
2449 va_end (ap);
2450 return elfcore_write_note (abfd, buf, bufsiz,
2451 "CORE", note_type, data, sizeof (data));
2452 }
2453 }
2454 }
2455
2456 static flagword
2457 ppc_elf_lookup_section_flags (char *flag_name)
2458 {
2459
2460 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2461 return SHF_PPC_VLE;
2462
2463 return 0;
2464 }
2465
2466 /* Return address for Ith PLT stub in section PLT, for relocation REL
2467 or (bfd_vma) -1 if it should not be included. */
2468
2469 static bfd_vma
2470 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2471 const asection *plt ATTRIBUTE_UNUSED,
2472 const arelent *rel)
2473 {
2474 return rel->address;
2475 }
2476
2477 /* Handle a PowerPC specific section when reading an object file. This
2478 is called when bfd_section_from_shdr finds a section with an unknown
2479 type. */
2480
2481 static bfd_boolean
2482 ppc_elf_section_from_shdr (bfd *abfd,
2483 Elf_Internal_Shdr *hdr,
2484 const char *name,
2485 int shindex)
2486 {
2487 asection *newsect;
2488 flagword flags;
2489
2490 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2491 return FALSE;
2492
2493 newsect = hdr->bfd_section;
2494 flags = bfd_get_section_flags (abfd, newsect);
2495 if (hdr->sh_flags & SHF_EXCLUDE)
2496 flags |= SEC_EXCLUDE;
2497
2498 if (hdr->sh_type == SHT_ORDERED)
2499 flags |= SEC_SORT_ENTRIES;
2500
2501 bfd_set_section_flags (abfd, newsect, flags);
2502 return TRUE;
2503 }
2504
2505 /* Set up any other section flags and such that may be necessary. */
2506
2507 static bfd_boolean
2508 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2509 Elf_Internal_Shdr *shdr,
2510 asection *asect)
2511 {
2512 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2513 shdr->sh_type = SHT_ORDERED;
2514
2515 return TRUE;
2516 }
2517
2518 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2519 need to bump up the number of section headers. */
2520
2521 static int
2522 ppc_elf_additional_program_headers (bfd *abfd,
2523 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2524 {
2525 asection *s;
2526 int ret = 0;
2527
2528 s = bfd_get_section_by_name (abfd, ".sbss2");
2529 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2530 ++ret;
2531
2532 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2533 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2534 ++ret;
2535
2536 return ret;
2537 }
2538
2539 /* Modify the segment map for VLE executables. */
2540
2541 bfd_boolean
2542 ppc_elf_modify_segment_map (bfd *abfd,
2543 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2544 {
2545 struct elf_segment_map *m;
2546
2547 /* At this point in the link, output sections have already been sorted by
2548 LMA and assigned to segments. All that is left to do is to ensure
2549 there is no mixing of VLE & non-VLE sections in a text segment.
2550 If we find that case, we split the segment.
2551 We maintain the original output section order. */
2552
2553 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2554 {
2555 struct elf_segment_map *n;
2556 bfd_size_type amt;
2557 unsigned int j, k;
2558 unsigned int p_flags;
2559
2560 if (m->p_type != PT_LOAD || m->count == 0)
2561 continue;
2562
2563 for (p_flags = PF_R, j = 0; j != m->count; ++j)
2564 {
2565 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2566 p_flags |= PF_W;
2567 if ((m->sections[j]->flags & SEC_CODE) != 0)
2568 {
2569 p_flags |= PF_X;
2570 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2571 p_flags |= PF_PPC_VLE;
2572 break;
2573 }
2574 }
2575 if (j != m->count)
2576 while (++j != m->count)
2577 {
2578 unsigned int p_flags1 = PF_R;
2579
2580 if ((m->sections[j]->flags & SEC_READONLY) == 0)
2581 p_flags1 |= PF_W;
2582 if ((m->sections[j]->flags & SEC_CODE) != 0)
2583 {
2584 p_flags1 |= PF_X;
2585 if ((elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0)
2586 p_flags1 |= PF_PPC_VLE;
2587 if (((p_flags1 ^ p_flags) & PF_PPC_VLE) != 0)
2588 break;
2589 }
2590 p_flags |= p_flags1;
2591 }
2592 /* If we're splitting a segment which originally contained rw
2593 sections then those sections might now only be in one of the
2594 two parts. So always set p_flags if splitting, even if we
2595 are being called for objcopy with p_flags_valid set. */
2596 if (j != m->count || !m->p_flags_valid)
2597 {
2598 m->p_flags_valid = 1;
2599 m->p_flags = p_flags;
2600 }
2601 if (j == m->count)
2602 continue;
2603
2604 /* Sections 0..j-1 stay in this (current) segment,
2605 the remainder are put in a new segment.
2606 The scan resumes with the new segment. */
2607
2608 amt = sizeof (struct elf_segment_map);
2609 amt += (m->count - j - 1) * sizeof (asection *);
2610 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2611 if (n == NULL)
2612 return FALSE;
2613
2614 n->p_type = PT_LOAD;
2615 n->count = m->count - j;
2616 for (k = 0; k < n->count; ++k)
2617 n->sections[k] = m->sections[j + k];
2618 m->count = j;
2619 m->p_size_valid = 0;
2620 n->next = m->next;
2621 m->next = n;
2622 }
2623
2624 return TRUE;
2625 }
2626
2627 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2628 .PPC.EMB.sbss0 a normal section, and not a bss section so
2629 that the linker doesn't crater when trying to make more than
2630 2 sections. */
2631
2632 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2633 {
2634 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2635 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2636 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2637 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2638 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2639 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2640 { STRING_COMMA_LEN (APUINFO_SECTION_NAME), 0, SHT_NOTE, 0 },
2641 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2642 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2643 { NULL, 0, 0, 0, 0 }
2644 };
2645
2646 /* This is what we want for new plt/got. */
2647 static struct bfd_elf_special_section ppc_alt_plt =
2648 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2649
2650 static const struct bfd_elf_special_section *
2651 ppc_elf_get_sec_type_attr (bfd *abfd, asection *sec)
2652 {
2653 const struct bfd_elf_special_section *ssect;
2654
2655 /* See if this is one of the special sections. */
2656 if (sec->name == NULL)
2657 return NULL;
2658
2659 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2660 sec->use_rela_p);
2661 if (ssect != NULL)
2662 {
2663 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2664 ssect = &ppc_alt_plt;
2665 return ssect;
2666 }
2667
2668 return _bfd_elf_get_sec_type_attr (abfd, sec);
2669 }
2670 \f
2671 /* Very simple linked list structure for recording apuinfo values. */
2672 typedef struct apuinfo_list
2673 {
2674 struct apuinfo_list *next;
2675 unsigned long value;
2676 }
2677 apuinfo_list;
2678
2679 static apuinfo_list *head;
2680 static bfd_boolean apuinfo_set;
2681
2682 static void
2683 apuinfo_list_init (void)
2684 {
2685 head = NULL;
2686 apuinfo_set = FALSE;
2687 }
2688
2689 static void
2690 apuinfo_list_add (unsigned long value)
2691 {
2692 apuinfo_list *entry = head;
2693
2694 while (entry != NULL)
2695 {
2696 if (entry->value == value)
2697 return;
2698 entry = entry->next;
2699 }
2700
2701 entry = bfd_malloc (sizeof (* entry));
2702 if (entry == NULL)
2703 return;
2704
2705 entry->value = value;
2706 entry->next = head;
2707 head = entry;
2708 }
2709
2710 static unsigned
2711 apuinfo_list_length (void)
2712 {
2713 apuinfo_list *entry;
2714 unsigned long count;
2715
2716 for (entry = head, count = 0;
2717 entry;
2718 entry = entry->next)
2719 ++ count;
2720
2721 return count;
2722 }
2723
2724 static inline unsigned long
2725 apuinfo_list_element (unsigned long number)
2726 {
2727 apuinfo_list * entry;
2728
2729 for (entry = head;
2730 entry && number --;
2731 entry = entry->next)
2732 ;
2733
2734 return entry ? entry->value : 0;
2735 }
2736
2737 static void
2738 apuinfo_list_finish (void)
2739 {
2740 apuinfo_list *entry;
2741
2742 for (entry = head; entry;)
2743 {
2744 apuinfo_list *next = entry->next;
2745 free (entry);
2746 entry = next;
2747 }
2748
2749 head = NULL;
2750 }
2751
2752 /* Scan the input BFDs and create a linked list of
2753 the APUinfo values that will need to be emitted. */
2754
2755 static void
2756 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2757 {
2758 bfd *ibfd;
2759 asection *asec;
2760 char *buffer = NULL;
2761 bfd_size_type largest_input_size = 0;
2762 unsigned i;
2763 unsigned long length;
2764 const char *error_message = NULL;
2765
2766 if (link_info == NULL)
2767 return;
2768
2769 apuinfo_list_init ();
2770
2771 /* Read in the input sections contents. */
2772 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link.next)
2773 {
2774 unsigned long datum;
2775
2776 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2777 if (asec == NULL)
2778 continue;
2779
2780 /* xgettext:c-format */
2781 error_message = _("corrupt %s section in %B");
2782 length = asec->size;
2783 if (length < 20)
2784 goto fail;
2785
2786 apuinfo_set = TRUE;
2787 if (largest_input_size < asec->size)
2788 {
2789 if (buffer)
2790 free (buffer);
2791 largest_input_size = asec->size;
2792 buffer = bfd_malloc (largest_input_size);
2793 if (!buffer)
2794 return;
2795 }
2796
2797 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2798 || (bfd_bread (buffer, length, ibfd) != length))
2799 {
2800 /* xgettext:c-format */
2801 error_message = _("unable to read in %s section from %B");
2802 goto fail;
2803 }
2804
2805 /* Verify the contents of the header. Note - we have to
2806 extract the values this way in order to allow for a
2807 host whose endian-ness is different from the target. */
2808 datum = bfd_get_32 (ibfd, buffer);
2809 if (datum != sizeof APUINFO_LABEL)
2810 goto fail;
2811
2812 datum = bfd_get_32 (ibfd, buffer + 8);
2813 if (datum != 0x2)
2814 goto fail;
2815
2816 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2817 goto fail;
2818
2819 /* Get the number of bytes used for apuinfo entries. */
2820 datum = bfd_get_32 (ibfd, buffer + 4);
2821 if (datum + 20 != length)
2822 goto fail;
2823
2824 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2825 for (i = 0; i < datum; i += 4)
2826 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2827 }
2828
2829 error_message = NULL;
2830
2831 if (apuinfo_set)
2832 {
2833 /* Compute the size of the output section. */
2834 unsigned num_entries = apuinfo_list_length ();
2835
2836 /* Set the output section size, if it exists. */
2837 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2838
2839 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2840 {
2841 ibfd = abfd;
2842 /* xgettext:c-format */
2843 error_message = _("warning: unable to set size of %s section in %B");
2844 }
2845 }
2846
2847 fail:
2848 if (buffer)
2849 free (buffer);
2850
2851 if (error_message)
2852 _bfd_error_handler (error_message, APUINFO_SECTION_NAME, ibfd);
2853 }
2854
2855 /* Prevent the output section from accumulating the input sections'
2856 contents. We have already stored this in our linked list structure. */
2857
2858 static bfd_boolean
2859 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2860 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2861 asection *asec,
2862 bfd_byte *contents ATTRIBUTE_UNUSED)
2863 {
2864 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2865 }
2866
2867 /* Finally we can generate the output section. */
2868
2869 static void
2870 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2871 {
2872 bfd_byte *buffer;
2873 asection *asec;
2874 unsigned i;
2875 unsigned num_entries;
2876 bfd_size_type length;
2877
2878 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2879 if (asec == NULL)
2880 return;
2881
2882 if (!apuinfo_set)
2883 return;
2884
2885 length = asec->size;
2886 if (length < 20)
2887 return;
2888
2889 buffer = bfd_malloc (length);
2890 if (buffer == NULL)
2891 {
2892 _bfd_error_handler
2893 (_("failed to allocate space for new APUinfo section."));
2894 return;
2895 }
2896
2897 /* Create the apuinfo header. */
2898 num_entries = apuinfo_list_length ();
2899 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2900 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2901 bfd_put_32 (abfd, 0x2, buffer + 8);
2902 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2903
2904 length = 20;
2905 for (i = 0; i < num_entries; i++)
2906 {
2907 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2908 length += 4;
2909 }
2910
2911 if (length != asec->size)
2912 _bfd_error_handler (_("failed to compute new APUinfo section."));
2913
2914 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2915 _bfd_error_handler (_("failed to install new APUinfo section."));
2916
2917 free (buffer);
2918
2919 apuinfo_list_finish ();
2920 }
2921 \f
2922 static bfd_boolean
2923 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2924 {
2925 bfd_byte buf[GLINK_ENTRY_SIZE];
2926
2927 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2928 return FALSE;
2929
2930 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2931 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2932 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2933 && bfd_get_32 (abfd, buf + 12) == BCTR);
2934 }
2935
2936 static bfd_boolean
2937 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2938 {
2939 bfd_vma vma = *(bfd_vma *) ptr;
2940 return ((section->flags & SEC_ALLOC) != 0
2941 && section->vma <= vma
2942 && vma < section->vma + section->size);
2943 }
2944
2945 static long
2946 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2947 long dynsymcount, asymbol **dynsyms,
2948 asymbol **ret)
2949 {
2950 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2951 asection *plt, *relplt, *dynamic, *glink;
2952 bfd_vma glink_vma = 0;
2953 bfd_vma resolv_vma = 0;
2954 bfd_vma stub_vma;
2955 asymbol *s;
2956 arelent *p;
2957 long count, i;
2958 size_t size;
2959 char *names;
2960 bfd_byte buf[4];
2961
2962 *ret = NULL;
2963
2964 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2965 return 0;
2966
2967 if (dynsymcount <= 0)
2968 return 0;
2969
2970 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2971 if (relplt == NULL)
2972 return 0;
2973
2974 plt = bfd_get_section_by_name (abfd, ".plt");
2975 if (plt == NULL)
2976 return 0;
2977
2978 /* Call common code to handle old-style executable PLTs. */
2979 if (elf_section_flags (plt) & SHF_EXECINSTR)
2980 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2981 dynsymcount, dynsyms, ret);
2982
2983 /* If this object was prelinked, the prelinker stored the address
2984 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2985 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2986 if (dynamic != NULL)
2987 {
2988 bfd_byte *dynbuf, *extdyn, *extdynend;
2989 size_t extdynsize;
2990 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2991
2992 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2993 return -1;
2994
2995 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2996 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2997
2998 extdyn = dynbuf;
2999 extdynend = extdyn + dynamic->size;
3000 for (; extdyn < extdynend; extdyn += extdynsize)
3001 {
3002 Elf_Internal_Dyn dyn;
3003 (*swap_dyn_in) (abfd, extdyn, &dyn);
3004
3005 if (dyn.d_tag == DT_NULL)
3006 break;
3007
3008 if (dyn.d_tag == DT_PPC_GOT)
3009 {
3010 unsigned int g_o_t = dyn.d_un.d_val;
3011 asection *got = bfd_get_section_by_name (abfd, ".got");
3012 if (got != NULL
3013 && bfd_get_section_contents (abfd, got, buf,
3014 g_o_t - got->vma + 4, 4))
3015 glink_vma = bfd_get_32 (abfd, buf);
3016 break;
3017 }
3018 }
3019 free (dynbuf);
3020 }
3021
3022 /* Otherwise we read the first plt entry. */
3023 if (glink_vma == 0)
3024 {
3025 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
3026 glink_vma = bfd_get_32 (abfd, buf);
3027 }
3028
3029 if (glink_vma == 0)
3030 return 0;
3031
3032 /* The .glink section usually does not survive the final
3033 link; search for the section (usually .text) where the
3034 glink stubs now reside. */
3035 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
3036 if (glink == NULL)
3037 return 0;
3038
3039 /* Determine glink PLT resolver by reading the relative branch
3040 from the first glink stub. */
3041 if (bfd_get_section_contents (abfd, glink, buf,
3042 glink_vma - glink->vma, 4))
3043 {
3044 unsigned int insn = bfd_get_32 (abfd, buf);
3045
3046 /* The first glink stub may either branch to the resolver ... */
3047 insn ^= B;
3048 if ((insn & ~0x3fffffc) == 0)
3049 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
3050
3051 /* ... or fall through a bunch of NOPs. */
3052 else if ((insn ^ B ^ NOP) == 0)
3053 for (i = 4;
3054 bfd_get_section_contents (abfd, glink, buf,
3055 glink_vma - glink->vma + i, 4);
3056 i += 4)
3057 if (bfd_get_32 (abfd, buf) != NOP)
3058 {
3059 resolv_vma = glink_vma + i;
3060 break;
3061 }
3062 }
3063
3064 count = relplt->size / sizeof (Elf32_External_Rela);
3065 /* If the stubs are those for -shared/-pie then we might have
3066 multiple stubs for each plt entry. If that is the case then
3067 there is no way to associate stubs with their plt entries short
3068 of figuring out the GOT pointer value used in the stub. */
3069 if (!is_nonpic_glink_stub (abfd, glink,
3070 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
3071 return 0;
3072
3073 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
3074 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
3075 return -1;
3076
3077 size = count * sizeof (asymbol);
3078 p = relplt->relocation;
3079 for (i = 0; i < count; i++, p++)
3080 {
3081 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
3082 if (p->addend != 0)
3083 size += sizeof ("+0x") - 1 + 8;
3084 }
3085
3086 size += sizeof (asymbol) + sizeof ("__glink");
3087
3088 if (resolv_vma)
3089 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
3090
3091 s = *ret = bfd_malloc (size);
3092 if (s == NULL)
3093 return -1;
3094
3095 stub_vma = glink_vma;
3096 names = (char *) (s + count + 1 + (resolv_vma != 0));
3097 p = relplt->relocation + count - 1;
3098 for (i = 0; i < count; i++)
3099 {
3100 size_t len;
3101
3102 *s = **p->sym_ptr_ptr;
3103 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
3104 we are defining a symbol, ensure one of them is set. */
3105 if ((s->flags & BSF_LOCAL) == 0)
3106 s->flags |= BSF_GLOBAL;
3107 s->flags |= BSF_SYNTHETIC;
3108 s->section = glink;
3109 stub_vma -= 16;
3110 if (strcmp ((*p->sym_ptr_ptr)->name, "__tls_get_addr_opt") == 0)
3111 stub_vma -= 32;
3112 s->value = stub_vma - glink->vma;
3113 s->name = names;
3114 s->udata.p = NULL;
3115 len = strlen ((*p->sym_ptr_ptr)->name);
3116 memcpy (names, (*p->sym_ptr_ptr)->name, len);
3117 names += len;
3118 if (p->addend != 0)
3119 {
3120 memcpy (names, "+0x", sizeof ("+0x") - 1);
3121 names += sizeof ("+0x") - 1;
3122 bfd_sprintf_vma (abfd, names, p->addend);
3123 names += strlen (names);
3124 }
3125 memcpy (names, "@plt", sizeof ("@plt"));
3126 names += sizeof ("@plt");
3127 ++s;
3128 --p;
3129 }
3130
3131 /* Add a symbol at the start of the glink branch table. */
3132 memset (s, 0, sizeof *s);
3133 s->the_bfd = abfd;
3134 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3135 s->section = glink;
3136 s->value = glink_vma - glink->vma;
3137 s->name = names;
3138 memcpy (names, "__glink", sizeof ("__glink"));
3139 names += sizeof ("__glink");
3140 s++;
3141 count++;
3142
3143 if (resolv_vma)
3144 {
3145 /* Add a symbol for the glink PLT resolver. */
3146 memset (s, 0, sizeof *s);
3147 s->the_bfd = abfd;
3148 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3149 s->section = glink;
3150 s->value = resolv_vma - glink->vma;
3151 s->name = names;
3152 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3153 names += sizeof ("__glink_PLTresolve");
3154 s++;
3155 count++;
3156 }
3157
3158 return count;
3159 }
3160 \f
3161 /* The following functions are specific to the ELF linker, while
3162 functions above are used generally. They appear in this file more
3163 or less in the order in which they are called. eg.
3164 ppc_elf_check_relocs is called early in the link process,
3165 ppc_elf_finish_dynamic_sections is one of the last functions
3166 called. */
3167
3168 /* Track PLT entries needed for a given symbol. We might need more
3169 than one glink entry per symbol when generating a pic binary. */
3170 struct plt_entry
3171 {
3172 struct plt_entry *next;
3173
3174 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3175 This field stores the offset into .got2 used to initialise the
3176 GOT pointer reg. It will always be at least 32768. (Current
3177 gcc always uses an offset of 32768, but ld -r will pack .got2
3178 sections together resulting in larger offsets). */
3179 bfd_vma addend;
3180
3181 /* The .got2 section. */
3182 asection *sec;
3183
3184 /* PLT refcount or offset. */
3185 union
3186 {
3187 bfd_signed_vma refcount;
3188 bfd_vma offset;
3189 } plt;
3190
3191 /* .glink stub offset. */
3192 bfd_vma glink_offset;
3193 };
3194
3195 /* Of those relocs that might be copied as dynamic relocs, this
3196 function selects those that must be copied when linking a shared
3197 library or PIE, even when the symbol is local. */
3198
3199 static int
3200 must_be_dyn_reloc (struct bfd_link_info *info,
3201 enum elf_ppc_reloc_type r_type)
3202 {
3203 switch (r_type)
3204 {
3205 default:
3206 /* Only relative relocs can be resolved when the object load
3207 address isn't fixed. DTPREL32 is excluded because the
3208 dynamic linker needs to differentiate global dynamic from
3209 local dynamic __tls_index pairs when PPC_OPT_TLS is set. */
3210 return 1;
3211
3212 case R_PPC_REL24:
3213 case R_PPC_REL14:
3214 case R_PPC_REL14_BRTAKEN:
3215 case R_PPC_REL14_BRNTAKEN:
3216 case R_PPC_REL32:
3217 return 0;
3218
3219 case R_PPC_TPREL32:
3220 case R_PPC_TPREL16:
3221 case R_PPC_TPREL16_LO:
3222 case R_PPC_TPREL16_HI:
3223 case R_PPC_TPREL16_HA:
3224 /* These relocations are relative but in a shared library the
3225 linker doesn't know the thread pointer base. */
3226 return bfd_link_dll (info);
3227 }
3228 }
3229
3230 /* Whether an undefined weak symbol should resolve to its link-time
3231 value, even in PIC or PIE objects. */
3232 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
3233 ((H)->root.type == bfd_link_hash_undefweak \
3234 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
3235 || (INFO)->dynamic_undefined_weak == 0))
3236
3237 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3238 copying dynamic variables from a shared lib into an app's dynbss
3239 section, and instead use a dynamic relocation to point into the
3240 shared lib. */
3241 #define ELIMINATE_COPY_RELOCS 1
3242
3243 /* Used to track dynamic relocations for local symbols. */
3244 struct ppc_dyn_relocs
3245 {
3246 struct ppc_dyn_relocs *next;
3247
3248 /* The input section of the reloc. */
3249 asection *sec;
3250
3251 /* Total number of relocs copied for the input section. */
3252 unsigned int count : 31;
3253
3254 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3255 unsigned int ifunc : 1;
3256 };
3257
3258 /* PPC ELF linker hash entry. */
3259
3260 struct ppc_elf_link_hash_entry
3261 {
3262 struct elf_link_hash_entry elf;
3263
3264 /* If this symbol is used in the linker created sections, the processor
3265 specific backend uses this field to map the field into the offset
3266 from the beginning of the section. */
3267 elf_linker_section_pointers_t *linker_section_pointer;
3268
3269 /* Track dynamic relocs copied for this symbol. */
3270 struct elf_dyn_relocs *dyn_relocs;
3271
3272 /* Contexts in which symbol is used in the GOT (or TOC).
3273 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3274 corresponding relocs are encountered during check_relocs.
3275 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3276 indicate the corresponding GOT entry type is not needed. */
3277 #define TLS_GD 1 /* GD reloc. */
3278 #define TLS_LD 2 /* LD reloc. */
3279 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3280 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3281 #define TLS_TLS 16 /* Any TLS reloc. */
3282 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3283 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3284 char tls_mask;
3285
3286 /* Nonzero if we have seen a small data relocation referring to this
3287 symbol. */
3288 unsigned char has_sda_refs : 1;
3289
3290 /* Flag use of given relocations. */
3291 unsigned char has_addr16_ha : 1;
3292 unsigned char has_addr16_lo : 1;
3293 };
3294
3295 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3296
3297 /* PPC ELF linker hash table. */
3298
3299 struct ppc_elf_link_hash_table
3300 {
3301 struct elf_link_hash_table elf;
3302
3303 /* Various options passed from the linker. */
3304 struct ppc_elf_params *params;
3305
3306 /* Short-cuts to get to dynamic linker sections. */
3307 asection *glink;
3308 asection *dynsbss;
3309 asection *relsbss;
3310 elf_linker_section_t sdata[2];
3311 asection *sbss;
3312 asection *glink_eh_frame;
3313
3314 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3315 asection *srelplt2;
3316
3317 /* Shortcut to __tls_get_addr. */
3318 struct elf_link_hash_entry *tls_get_addr;
3319
3320 /* The bfd that forced an old-style PLT. */
3321 bfd *old_bfd;
3322
3323 /* TLS local dynamic got entry handling. */
3324 union {
3325 bfd_signed_vma refcount;
3326 bfd_vma offset;
3327 } tlsld_got;
3328
3329 /* Offset of branch table to PltResolve function in glink. */
3330 bfd_vma glink_pltresolve;
3331
3332 /* Size of reserved GOT entries. */
3333 unsigned int got_header_size;
3334 /* Non-zero if allocating the header left a gap. */
3335 unsigned int got_gap;
3336
3337 /* The type of PLT we have chosen to use. */
3338 enum ppc_elf_plt_type plt_type;
3339
3340 /* True if the target system is VxWorks. */
3341 unsigned int is_vxworks:1;
3342
3343 /* Whether there exist local gnu indirect function resolvers,
3344 referenced by dynamic relocations. */
3345 unsigned int local_ifunc_resolver:1;
3346 unsigned int maybe_local_ifunc_resolver:1;
3347
3348 /* Set if tls optimization is enabled. */
3349 unsigned int do_tls_opt:1;
3350
3351 /* The size of PLT entries. */
3352 int plt_entry_size;
3353 /* The distance between adjacent PLT slots. */
3354 int plt_slot_size;
3355 /* The size of the first PLT entry. */
3356 int plt_initial_entry_size;
3357
3358 /* Small local sym cache. */
3359 struct sym_cache sym_cache;
3360 };
3361
3362 /* Rename some of the generic section flags to better document how they
3363 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3364
3365 /* Nonzero if this section has TLS related relocations. */
3366 #define has_tls_reloc sec_flg0
3367
3368 /* Nonzero if this section has a call to __tls_get_addr. */
3369 #define has_tls_get_addr_call sec_flg1
3370
3371 /* Get the PPC ELF linker hash table from a link_info structure. */
3372
3373 #define ppc_elf_hash_table(p) \
3374 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3375 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3376
3377 /* Create an entry in a PPC ELF linker hash table. */
3378
3379 static struct bfd_hash_entry *
3380 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3381 struct bfd_hash_table *table,
3382 const char *string)
3383 {
3384 /* Allocate the structure if it has not already been allocated by a
3385 subclass. */
3386 if (entry == NULL)
3387 {
3388 entry = bfd_hash_allocate (table,
3389 sizeof (struct ppc_elf_link_hash_entry));
3390 if (entry == NULL)
3391 return entry;
3392 }
3393
3394 /* Call the allocation method of the superclass. */
3395 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3396 if (entry != NULL)
3397 {
3398 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3399 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3400 ppc_elf_hash_entry (entry)->tls_mask = 0;
3401 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3402 }
3403
3404 return entry;
3405 }
3406
3407 /* Create a PPC ELF linker hash table. */
3408
3409 static struct bfd_link_hash_table *
3410 ppc_elf_link_hash_table_create (bfd *abfd)
3411 {
3412 struct ppc_elf_link_hash_table *ret;
3413 static struct ppc_elf_params default_params
3414 = { PLT_OLD, 0, 1, 0, 0, 12, 0, 0, 0 };
3415
3416 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3417 if (ret == NULL)
3418 return NULL;
3419
3420 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3421 ppc_elf_link_hash_newfunc,
3422 sizeof (struct ppc_elf_link_hash_entry),
3423 PPC32_ELF_DATA))
3424 {
3425 free (ret);
3426 return NULL;
3427 }
3428
3429 ret->elf.init_plt_refcount.refcount = 0;
3430 ret->elf.init_plt_refcount.glist = NULL;
3431 ret->elf.init_plt_offset.offset = 0;
3432 ret->elf.init_plt_offset.glist = NULL;
3433
3434 ret->params = &default_params;
3435
3436 ret->sdata[0].name = ".sdata";
3437 ret->sdata[0].sym_name = "_SDA_BASE_";
3438 ret->sdata[0].bss_name = ".sbss";
3439
3440 ret->sdata[1].name = ".sdata2";
3441 ret->sdata[1].sym_name = "_SDA2_BASE_";
3442 ret->sdata[1].bss_name = ".sbss2";
3443
3444 ret->plt_entry_size = 12;
3445 ret->plt_slot_size = 8;
3446 ret->plt_initial_entry_size = 72;
3447
3448 return &ret->elf.root;
3449 }
3450
3451 /* Hook linker params into hash table. */
3452
3453 void
3454 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3455 {
3456 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3457
3458 if (htab)
3459 htab->params = params;
3460 params->pagesize_p2 = bfd_log2 (params->pagesize);
3461 }
3462
3463 /* Create .got and the related sections. */
3464
3465 static bfd_boolean
3466 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3467 {
3468 struct ppc_elf_link_hash_table *htab;
3469
3470 if (!_bfd_elf_create_got_section (abfd, info))
3471 return FALSE;
3472
3473 htab = ppc_elf_hash_table (info);
3474 if (!htab->is_vxworks)
3475 {
3476 /* The powerpc .got has a blrl instruction in it. Mark it
3477 executable. */
3478 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3479 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3480 if (!bfd_set_section_flags (abfd, htab->elf.sgot, flags))
3481 return FALSE;
3482 }
3483
3484 return TRUE;
3485 }
3486
3487 /* Create a special linker section, used for R_PPC_EMB_SDAI16 and
3488 R_PPC_EMB_SDA2I16 pointers. These sections become part of .sdata
3489 and .sdata2. Create _SDA_BASE_ and _SDA2_BASE too. */
3490
3491 static bfd_boolean
3492 ppc_elf_create_linker_section (bfd *abfd,
3493 struct bfd_link_info *info,
3494 flagword flags,
3495 elf_linker_section_t *lsect)
3496 {
3497 asection *s;
3498
3499 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3500 | SEC_LINKER_CREATED);
3501
3502 s = bfd_make_section_anyway_with_flags (abfd, lsect->name, flags);
3503 if (s == NULL)
3504 return FALSE;
3505 lsect->section = s;
3506
3507 /* Define the sym on the first section of this name. */
3508 s = bfd_get_section_by_name (abfd, lsect->name);
3509
3510 lsect->sym = _bfd_elf_define_linkage_sym (abfd, info, s, lsect->sym_name);
3511 if (lsect->sym == NULL)
3512 return FALSE;
3513 lsect->sym->root.u.def.value = 0x8000;
3514 return TRUE;
3515 }
3516
3517 static bfd_boolean
3518 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3519 {
3520 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3521 asection *s;
3522 flagword flags;
3523
3524 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3525 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3526 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3527 htab->glink = s;
3528 if (s == NULL
3529 || !bfd_set_section_alignment (abfd, s,
3530 htab->params->ppc476_workaround ? 6 : 4))
3531 return FALSE;
3532
3533 if (!info->no_ld_generated_unwind_info)
3534 {
3535 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3536 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3537 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3538 htab->glink_eh_frame = s;
3539 if (s == NULL
3540 || !bfd_set_section_alignment (abfd, s, 2))
3541 return FALSE;
3542 }
3543
3544 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3545 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3546 htab->elf.iplt = s;
3547 if (s == NULL
3548 || !bfd_set_section_alignment (abfd, s, 4))
3549 return FALSE;
3550
3551 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3552 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3553 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3554 htab->elf.irelplt = s;
3555 if (s == NULL
3556 || ! bfd_set_section_alignment (abfd, s, 2))
3557 return FALSE;
3558
3559 if (!ppc_elf_create_linker_section (abfd, info, 0,
3560 &htab->sdata[0]))
3561 return FALSE;
3562
3563 if (!ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3564 &htab->sdata[1]))
3565 return FALSE;
3566
3567 return TRUE;
3568 }
3569
3570 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3571 to output sections (just like _bfd_elf_create_dynamic_sections has
3572 to create .dynbss and .rela.bss). */
3573
3574 static bfd_boolean
3575 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3576 {
3577 struct ppc_elf_link_hash_table *htab;
3578 asection *s;
3579 flagword flags;
3580
3581 htab = ppc_elf_hash_table (info);
3582
3583 if (htab->elf.sgot == NULL
3584 && !ppc_elf_create_got (abfd, info))
3585 return FALSE;
3586
3587 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3588 return FALSE;
3589
3590 if (htab->glink == NULL
3591 && !ppc_elf_create_glink (abfd, info))
3592 return FALSE;
3593
3594 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3595 SEC_ALLOC | SEC_LINKER_CREATED);
3596 htab->dynsbss = s;
3597 if (s == NULL)
3598 return FALSE;
3599
3600 if (! bfd_link_pic (info))
3601 {
3602 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3603 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3604 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3605 htab->relsbss = s;
3606 if (s == NULL
3607 || ! bfd_set_section_alignment (abfd, s, 2))
3608 return FALSE;
3609 }
3610
3611 if (htab->is_vxworks
3612 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3613 return FALSE;
3614
3615 s = htab->elf.splt;
3616 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3617 if (htab->plt_type == PLT_VXWORKS)
3618 /* The VxWorks PLT is a loaded section with contents. */
3619 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3620 return bfd_set_section_flags (abfd, s, flags);
3621 }
3622
3623 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3624
3625 static void
3626 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3627 struct elf_link_hash_entry *dir,
3628 struct elf_link_hash_entry *ind)
3629 {
3630 struct ppc_elf_link_hash_entry *edir, *eind;
3631
3632 edir = (struct ppc_elf_link_hash_entry *) dir;
3633 eind = (struct ppc_elf_link_hash_entry *) ind;
3634
3635 edir->tls_mask |= eind->tls_mask;
3636 edir->has_sda_refs |= eind->has_sda_refs;
3637
3638 /* If called to transfer flags for a weakdef during processing
3639 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3640 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3641 if (!(ELIMINATE_COPY_RELOCS
3642 && eind->elf.root.type != bfd_link_hash_indirect
3643 && edir->elf.dynamic_adjusted))
3644 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3645
3646 if (edir->elf.versioned != versioned_hidden)
3647 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3648 edir->elf.ref_regular |= eind->elf.ref_regular;
3649 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3650 edir->elf.needs_plt |= eind->elf.needs_plt;
3651 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3652
3653 if (eind->dyn_relocs != NULL)
3654 {
3655 if (edir->dyn_relocs != NULL)
3656 {
3657 struct elf_dyn_relocs **pp;
3658 struct elf_dyn_relocs *p;
3659
3660 /* Add reloc counts against the indirect sym to the direct sym
3661 list. Merge any entries against the same section. */
3662 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3663 {
3664 struct elf_dyn_relocs *q;
3665
3666 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3667 if (q->sec == p->sec)
3668 {
3669 q->pc_count += p->pc_count;
3670 q->count += p->count;
3671 *pp = p->next;
3672 break;
3673 }
3674 if (q == NULL)
3675 pp = &p->next;
3676 }
3677 *pp = edir->dyn_relocs;
3678 }
3679
3680 edir->dyn_relocs = eind->dyn_relocs;
3681 eind->dyn_relocs = NULL;
3682 }
3683
3684 /* If we were called to copy over info for a weak sym, that's all.
3685 You might think dyn_relocs need not be copied over; After all,
3686 both syms will be dynamic or both non-dynamic so we're just
3687 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3688 code in ppc_elf_adjust_dynamic_symbol needs to check for
3689 dyn_relocs in read-only sections, and it does so on what is the
3690 DIR sym here. */
3691 if (eind->elf.root.type != bfd_link_hash_indirect)
3692 return;
3693
3694 /* Copy over the GOT refcount entries that we may have already seen to
3695 the symbol which just became indirect. */
3696 edir->elf.got.refcount += eind->elf.got.refcount;
3697 eind->elf.got.refcount = 0;
3698
3699 /* And plt entries. */
3700 if (eind->elf.plt.plist != NULL)
3701 {
3702 if (edir->elf.plt.plist != NULL)
3703 {
3704 struct plt_entry **entp;
3705 struct plt_entry *ent;
3706
3707 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3708 {
3709 struct plt_entry *dent;
3710
3711 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3712 if (dent->sec == ent->sec && dent->addend == ent->addend)
3713 {
3714 dent->plt.refcount += ent->plt.refcount;
3715 *entp = ent->next;
3716 break;
3717 }
3718 if (dent == NULL)
3719 entp = &ent->next;
3720 }
3721 *entp = edir->elf.plt.plist;
3722 }
3723
3724 edir->elf.plt.plist = eind->elf.plt.plist;
3725 eind->elf.plt.plist = NULL;
3726 }
3727
3728 if (eind->elf.dynindx != -1)
3729 {
3730 if (edir->elf.dynindx != -1)
3731 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3732 edir->elf.dynstr_index);
3733 edir->elf.dynindx = eind->elf.dynindx;
3734 edir->elf.dynstr_index = eind->elf.dynstr_index;
3735 eind->elf.dynindx = -1;
3736 eind->elf.dynstr_index = 0;
3737 }
3738 }
3739
3740 /* Hook called by the linker routine which adds symbols from an object
3741 file. We use it to put .comm items in .sbss, and not .bss. */
3742
3743 static bfd_boolean
3744 ppc_elf_add_symbol_hook (bfd *abfd,
3745 struct bfd_link_info *info,
3746 Elf_Internal_Sym *sym,
3747 const char **namep ATTRIBUTE_UNUSED,
3748 flagword *flagsp ATTRIBUTE_UNUSED,
3749 asection **secp,
3750 bfd_vma *valp)
3751 {
3752 if (sym->st_shndx == SHN_COMMON
3753 && !bfd_link_relocatable (info)
3754 && is_ppc_elf (info->output_bfd)
3755 && sym->st_size <= elf_gp_size (abfd))
3756 {
3757 /* Common symbols less than or equal to -G nn bytes are automatically
3758 put into .sbss. */
3759 struct ppc_elf_link_hash_table *htab;
3760
3761 htab = ppc_elf_hash_table (info);
3762 if (htab->sbss == NULL)
3763 {
3764 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3765
3766 if (!htab->elf.dynobj)
3767 htab->elf.dynobj = abfd;
3768
3769 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3770 ".sbss",
3771 flags);
3772 if (htab->sbss == NULL)
3773 return FALSE;
3774 }
3775
3776 *secp = htab->sbss;
3777 *valp = sym->st_size;
3778 }
3779
3780 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3781 && (abfd->flags & DYNAMIC) == 0
3782 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
3783 elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
3784
3785 return TRUE;
3786 }
3787 \f
3788 /* Find a linker generated pointer with a given addend and type. */
3789
3790 static elf_linker_section_pointers_t *
3791 elf_find_pointer_linker_section
3792 (elf_linker_section_pointers_t *linker_pointers,
3793 bfd_vma addend,
3794 elf_linker_section_t *lsect)
3795 {
3796 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3797 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3798 return linker_pointers;
3799
3800 return NULL;
3801 }
3802
3803 /* Allocate a pointer to live in a linker created section. */
3804
3805 static bfd_boolean
3806 elf_allocate_pointer_linker_section (bfd *abfd,
3807 elf_linker_section_t *lsect,
3808 struct elf_link_hash_entry *h,
3809 const Elf_Internal_Rela *rel)
3810 {
3811 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3812 elf_linker_section_pointers_t *linker_section_ptr;
3813 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3814 bfd_size_type amt;
3815
3816 BFD_ASSERT (lsect != NULL);
3817
3818 /* Is this a global symbol? */
3819 if (h != NULL)
3820 {
3821 struct ppc_elf_link_hash_entry *eh;
3822
3823 /* Has this symbol already been allocated? If so, our work is done. */
3824 eh = (struct ppc_elf_link_hash_entry *) h;
3825 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3826 rel->r_addend,
3827 lsect))
3828 return TRUE;
3829
3830 ptr_linker_section_ptr = &eh->linker_section_pointer;
3831 }
3832 else
3833 {
3834 BFD_ASSERT (is_ppc_elf (abfd));
3835
3836 /* Allocation of a pointer to a local symbol. */
3837 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3838
3839 /* Allocate a table to hold the local symbols if first time. */
3840 if (!ptr)
3841 {
3842 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3843
3844 amt = num_symbols;
3845 amt *= sizeof (elf_linker_section_pointers_t *);
3846 ptr = bfd_zalloc (abfd, amt);
3847
3848 if (!ptr)
3849 return FALSE;
3850
3851 elf_local_ptr_offsets (abfd) = ptr;
3852 }
3853
3854 /* Has this symbol already been allocated? If so, our work is done. */
3855 if (elf_find_pointer_linker_section (ptr[r_symndx],
3856 rel->r_addend,
3857 lsect))
3858 return TRUE;
3859
3860 ptr_linker_section_ptr = &ptr[r_symndx];
3861 }
3862
3863 /* Allocate space for a pointer in the linker section, and allocate
3864 a new pointer record from internal memory. */
3865 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3866 amt = sizeof (elf_linker_section_pointers_t);
3867 linker_section_ptr = bfd_alloc (abfd, amt);
3868
3869 if (!linker_section_ptr)
3870 return FALSE;
3871
3872 linker_section_ptr->next = *ptr_linker_section_ptr;
3873 linker_section_ptr->addend = rel->r_addend;
3874 linker_section_ptr->lsect = lsect;
3875 *ptr_linker_section_ptr = linker_section_ptr;
3876
3877 if (!bfd_set_section_alignment (lsect->section->owner, lsect->section, 2))
3878 return FALSE;
3879 linker_section_ptr->offset = lsect->section->size;
3880 lsect->section->size += 4;
3881
3882 #ifdef DEBUG
3883 fprintf (stderr,
3884 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3885 lsect->name, (long) linker_section_ptr->offset,
3886 (long) lsect->section->size);
3887 #endif
3888
3889 return TRUE;
3890 }
3891
3892 static struct plt_entry **
3893 update_local_sym_info (bfd *abfd,
3894 Elf_Internal_Shdr *symtab_hdr,
3895 unsigned long r_symndx,
3896 int tls_type)
3897 {
3898 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3899 struct plt_entry **local_plt;
3900 char *local_got_tls_masks;
3901
3902 if (local_got_refcounts == NULL)
3903 {
3904 bfd_size_type size = symtab_hdr->sh_info;
3905
3906 size *= (sizeof (*local_got_refcounts)
3907 + sizeof (*local_plt)
3908 + sizeof (*local_got_tls_masks));
3909 local_got_refcounts = bfd_zalloc (abfd, size);
3910 if (local_got_refcounts == NULL)
3911 return NULL;
3912 elf_local_got_refcounts (abfd) = local_got_refcounts;
3913 }
3914
3915 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3916 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3917 local_got_tls_masks[r_symndx] |= tls_type;
3918 if (tls_type != PLT_IFUNC)
3919 local_got_refcounts[r_symndx] += 1;
3920 return local_plt + r_symndx;
3921 }
3922
3923 static bfd_boolean
3924 update_plt_info (bfd *abfd, struct plt_entry **plist,
3925 asection *sec, bfd_vma addend)
3926 {
3927 struct plt_entry *ent;
3928
3929 if (addend < 32768)
3930 sec = NULL;
3931 for (ent = *plist; ent != NULL; ent = ent->next)
3932 if (ent->sec == sec && ent->addend == addend)
3933 break;
3934 if (ent == NULL)
3935 {
3936 bfd_size_type amt = sizeof (*ent);
3937 ent = bfd_alloc (abfd, amt);
3938 if (ent == NULL)
3939 return FALSE;
3940 ent->next = *plist;
3941 ent->sec = sec;
3942 ent->addend = addend;
3943 ent->plt.refcount = 0;
3944 *plist = ent;
3945 }
3946 ent->plt.refcount += 1;
3947 return TRUE;
3948 }
3949
3950 static struct plt_entry *
3951 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3952 {
3953 struct plt_entry *ent;
3954
3955 if (addend < 32768)
3956 sec = NULL;
3957 for (ent = *plist; ent != NULL; ent = ent->next)
3958 if (ent->sec == sec && ent->addend == addend)
3959 break;
3960 return ent;
3961 }
3962
3963 static bfd_boolean
3964 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3965 {
3966 return (r_type == R_PPC_PLTREL24
3967 || r_type == R_PPC_LOCAL24PC
3968 || r_type == R_PPC_REL24
3969 || r_type == R_PPC_REL14
3970 || r_type == R_PPC_REL14_BRTAKEN
3971 || r_type == R_PPC_REL14_BRNTAKEN
3972 || r_type == R_PPC_ADDR24
3973 || r_type == R_PPC_ADDR14
3974 || r_type == R_PPC_ADDR14_BRTAKEN
3975 || r_type == R_PPC_ADDR14_BRNTAKEN
3976 || r_type == R_PPC_VLE_REL24);
3977 }
3978
3979 static void
3980 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3981 {
3982 _bfd_error_handler
3983 /* xgettext:c-format */
3984 (_("%B: relocation %s cannot be used when making a shared object"),
3985 abfd,
3986 ppc_elf_howto_table[r_type]->name);
3987 bfd_set_error (bfd_error_bad_value);
3988 }
3989
3990 /* Look through the relocs for a section during the first phase, and
3991 allocate space in the global offset table or procedure linkage
3992 table. */
3993
3994 static bfd_boolean
3995 ppc_elf_check_relocs (bfd *abfd,
3996 struct bfd_link_info *info,
3997 asection *sec,
3998 const Elf_Internal_Rela *relocs)
3999 {
4000 struct ppc_elf_link_hash_table *htab;
4001 Elf_Internal_Shdr *symtab_hdr;
4002 struct elf_link_hash_entry **sym_hashes;
4003 const Elf_Internal_Rela *rel;
4004 const Elf_Internal_Rela *rel_end;
4005 asection *got2, *sreloc;
4006 struct elf_link_hash_entry *tga;
4007
4008 if (bfd_link_relocatable (info))
4009 return TRUE;
4010
4011 /* Don't do anything special with non-loaded, non-alloced sections.
4012 In particular, any relocs in such sections should not affect GOT
4013 and PLT reference counting (ie. we don't allow them to create GOT
4014 or PLT entries), there's no possibility or desire to optimize TLS
4015 relocs, and there's not much point in propagating relocs to shared
4016 libs that the dynamic linker won't relocate. */
4017 if ((sec->flags & SEC_ALLOC) == 0)
4018 return TRUE;
4019
4020 #ifdef DEBUG
4021 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
4022 sec, abfd);
4023 #endif
4024
4025 BFD_ASSERT (is_ppc_elf (abfd));
4026
4027 /* Initialize howto table if not already done. */
4028 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4029 ppc_elf_howto_init ();
4030
4031 htab = ppc_elf_hash_table (info);
4032 if (htab->glink == NULL)
4033 {
4034 if (htab->elf.dynobj == NULL)
4035 htab->elf.dynobj = abfd;
4036 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
4037 return FALSE;
4038 }
4039 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4040 FALSE, FALSE, TRUE);
4041 symtab_hdr = &elf_symtab_hdr (abfd);
4042 sym_hashes = elf_sym_hashes (abfd);
4043 got2 = bfd_get_section_by_name (abfd, ".got2");
4044 sreloc = NULL;
4045
4046 rel_end = relocs + sec->reloc_count;
4047 for (rel = relocs; rel < rel_end; rel++)
4048 {
4049 unsigned long r_symndx;
4050 enum elf_ppc_reloc_type r_type;
4051 struct elf_link_hash_entry *h;
4052 int tls_type;
4053 struct plt_entry **ifunc;
4054
4055 r_symndx = ELF32_R_SYM (rel->r_info);
4056 if (r_symndx < symtab_hdr->sh_info)
4057 h = NULL;
4058 else
4059 {
4060 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4061 while (h->root.type == bfd_link_hash_indirect
4062 || h->root.type == bfd_link_hash_warning)
4063 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4064
4065 /* PR15323, ref flags aren't set for references in the same
4066 object. */
4067 h->root.non_ir_ref_regular = 1;
4068 }
4069
4070 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
4071 This shows up in particular in an R_PPC_ADDR32 in the eabi
4072 startup code. */
4073 if (h != NULL
4074 && htab->elf.sgot == NULL
4075 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
4076 {
4077 if (htab->elf.dynobj == NULL)
4078 htab->elf.dynobj = abfd;
4079 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4080 return FALSE;
4081 BFD_ASSERT (h == htab->elf.hgot);
4082 }
4083
4084 tls_type = 0;
4085 r_type = ELF32_R_TYPE (rel->r_info);
4086 ifunc = NULL;
4087 if (h == NULL && !htab->is_vxworks)
4088 {
4089 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4090 abfd, r_symndx);
4091 if (isym == NULL)
4092 return FALSE;
4093
4094 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4095 {
4096 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
4097 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
4098 PLT_IFUNC);
4099 if (ifunc == NULL)
4100 return FALSE;
4101
4102 /* STT_GNU_IFUNC symbols must have a PLT entry;
4103 In a non-pie executable even when there are
4104 no plt calls. */
4105 if (!bfd_link_pic (info)
4106 || is_branch_reloc (r_type))
4107 {
4108 bfd_vma addend = 0;
4109 if (r_type == R_PPC_PLTREL24)
4110 {
4111 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4112 if (bfd_link_pic (info))
4113 addend = rel->r_addend;
4114 }
4115 if (!update_plt_info (abfd, ifunc, got2, addend))
4116 return FALSE;
4117 }
4118 }
4119 }
4120
4121 if (!htab->is_vxworks
4122 && is_branch_reloc (r_type)
4123 && h != NULL
4124 && h == tga)
4125 {
4126 if (rel != relocs
4127 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
4128 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
4129 /* We have a new-style __tls_get_addr call with a marker
4130 reloc. */
4131 ;
4132 else
4133 /* Mark this section as having an old-style call. */
4134 sec->has_tls_get_addr_call = 1;
4135 }
4136
4137 switch (r_type)
4138 {
4139 case R_PPC_TLSGD:
4140 case R_PPC_TLSLD:
4141 /* These special tls relocs tie a call to __tls_get_addr with
4142 its parameter symbol. */
4143 break;
4144
4145 case R_PPC_GOT_TLSLD16:
4146 case R_PPC_GOT_TLSLD16_LO:
4147 case R_PPC_GOT_TLSLD16_HI:
4148 case R_PPC_GOT_TLSLD16_HA:
4149 tls_type = TLS_TLS | TLS_LD;
4150 goto dogottls;
4151
4152 case R_PPC_GOT_TLSGD16:
4153 case R_PPC_GOT_TLSGD16_LO:
4154 case R_PPC_GOT_TLSGD16_HI:
4155 case R_PPC_GOT_TLSGD16_HA:
4156 tls_type = TLS_TLS | TLS_GD;
4157 goto dogottls;
4158
4159 case R_PPC_GOT_TPREL16:
4160 case R_PPC_GOT_TPREL16_LO:
4161 case R_PPC_GOT_TPREL16_HI:
4162 case R_PPC_GOT_TPREL16_HA:
4163 if (bfd_link_dll (info))
4164 info->flags |= DF_STATIC_TLS;
4165 tls_type = TLS_TLS | TLS_TPREL;
4166 goto dogottls;
4167
4168 case R_PPC_GOT_DTPREL16:
4169 case R_PPC_GOT_DTPREL16_LO:
4170 case R_PPC_GOT_DTPREL16_HI:
4171 case R_PPC_GOT_DTPREL16_HA:
4172 tls_type = TLS_TLS | TLS_DTPREL;
4173 dogottls:
4174 sec->has_tls_reloc = 1;
4175 /* Fall through. */
4176
4177 /* GOT16 relocations */
4178 case R_PPC_GOT16:
4179 case R_PPC_GOT16_LO:
4180 case R_PPC_GOT16_HI:
4181 case R_PPC_GOT16_HA:
4182 /* This symbol requires a global offset table entry. */
4183 if (htab->elf.sgot == NULL)
4184 {
4185 if (htab->elf.dynobj == NULL)
4186 htab->elf.dynobj = abfd;
4187 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4188 return FALSE;
4189 }
4190 if (h != NULL)
4191 {
4192 h->got.refcount += 1;
4193 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4194 }
4195 else
4196 /* This is a global offset table entry for a local symbol. */
4197 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4198 return FALSE;
4199
4200 /* We may also need a plt entry if the symbol turns out to be
4201 an ifunc. */
4202 if (h != NULL && !bfd_link_pic (info))
4203 {
4204 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4205 return FALSE;
4206 }
4207 break;
4208
4209 /* Indirect .sdata relocation. */
4210 case R_PPC_EMB_SDAI16:
4211 if (bfd_link_pic (info))
4212 {
4213 bad_shared_reloc (abfd, r_type);
4214 return FALSE;
4215 }
4216 htab->sdata[0].sym->ref_regular = 1;
4217 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[0],
4218 h, rel))
4219 return FALSE;
4220 if (h != NULL)
4221 {
4222 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4223 h->non_got_ref = TRUE;
4224 }
4225 break;
4226
4227 /* Indirect .sdata2 relocation. */
4228 case R_PPC_EMB_SDA2I16:
4229 if (bfd_link_pic (info))
4230 {
4231 bad_shared_reloc (abfd, r_type);
4232 return FALSE;
4233 }
4234 htab->sdata[1].sym->ref_regular = 1;
4235 if (!elf_allocate_pointer_linker_section (abfd, &htab->sdata[1],
4236 h, rel))
4237 return FALSE;
4238 if (h != NULL)
4239 {
4240 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4241 h->non_got_ref = TRUE;
4242 }
4243 break;
4244
4245 case R_PPC_SDAREL16:
4246 htab->sdata[0].sym->ref_regular = 1;
4247 /* Fall through. */
4248
4249 case R_PPC_VLE_SDAREL_LO16A:
4250 case R_PPC_VLE_SDAREL_LO16D:
4251 case R_PPC_VLE_SDAREL_HI16A:
4252 case R_PPC_VLE_SDAREL_HI16D:
4253 case R_PPC_VLE_SDAREL_HA16A:
4254 case R_PPC_VLE_SDAREL_HA16D:
4255 if (h != NULL)
4256 {
4257 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4258 h->non_got_ref = TRUE;
4259 }
4260 break;
4261
4262 case R_PPC_VLE_REL8:
4263 case R_PPC_VLE_REL15:
4264 case R_PPC_VLE_REL24:
4265 case R_PPC_VLE_LO16A:
4266 case R_PPC_VLE_LO16D:
4267 case R_PPC_VLE_HI16A:
4268 case R_PPC_VLE_HI16D:
4269 case R_PPC_VLE_HA16A:
4270 case R_PPC_VLE_HA16D:
4271 break;
4272
4273 case R_PPC_EMB_SDA2REL:
4274 if (bfd_link_pic (info))
4275 {
4276 bad_shared_reloc (abfd, r_type);
4277 return FALSE;
4278 }
4279 htab->sdata[1].sym->ref_regular = 1;
4280 if (h != NULL)
4281 {
4282 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4283 h->non_got_ref = TRUE;
4284 }
4285 break;
4286
4287 case R_PPC_VLE_SDA21_LO:
4288 case R_PPC_VLE_SDA21:
4289 case R_PPC_EMB_SDA21:
4290 case R_PPC_EMB_RELSDA:
4291 if (bfd_link_pic (info))
4292 {
4293 bad_shared_reloc (abfd, r_type);
4294 return FALSE;
4295 }
4296 if (h != NULL)
4297 {
4298 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4299 h->non_got_ref = TRUE;
4300 }
4301 break;
4302
4303 case R_PPC_EMB_NADDR32:
4304 case R_PPC_EMB_NADDR16:
4305 case R_PPC_EMB_NADDR16_LO:
4306 case R_PPC_EMB_NADDR16_HI:
4307 case R_PPC_EMB_NADDR16_HA:
4308 if (bfd_link_pic (info))
4309 {
4310 bad_shared_reloc (abfd, r_type);
4311 return FALSE;
4312 }
4313 if (h != NULL)
4314 h->non_got_ref = TRUE;
4315 break;
4316
4317 case R_PPC_PLTREL24:
4318 if (h == NULL)
4319 break;
4320 /* Fall through */
4321 case R_PPC_PLT32:
4322 case R_PPC_PLTREL32:
4323 case R_PPC_PLT16_LO:
4324 case R_PPC_PLT16_HI:
4325 case R_PPC_PLT16_HA:
4326 #ifdef DEBUG
4327 fprintf (stderr, "Reloc requires a PLT entry\n");
4328 #endif
4329 /* This symbol requires a procedure linkage table entry. */
4330 if (h == NULL)
4331 {
4332 if (ifunc == NULL)
4333 {
4334 /* It does not make sense to have a procedure linkage
4335 table entry for a non-ifunc local symbol. */
4336 info->callbacks->einfo
4337 /* xgettext:c-format */
4338 (_("%H: %s reloc against local symbol\n"),
4339 abfd, sec, rel->r_offset,
4340 ppc_elf_howto_table[r_type]->name);
4341 bfd_set_error (bfd_error_bad_value);
4342 return FALSE;
4343 }
4344 }
4345 else
4346 {
4347 bfd_vma addend = 0;
4348
4349 if (r_type == R_PPC_PLTREL24)
4350 {
4351 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4352 if (bfd_link_pic (info))
4353 addend = rel->r_addend;
4354 }
4355 h->needs_plt = 1;
4356 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4357 return FALSE;
4358 }
4359 break;
4360
4361 /* The following relocations don't need to propagate the
4362 relocation if linking a shared object since they are
4363 section relative. */
4364 case R_PPC_SECTOFF:
4365 case R_PPC_SECTOFF_LO:
4366 case R_PPC_SECTOFF_HI:
4367 case R_PPC_SECTOFF_HA:
4368 case R_PPC_DTPREL16:
4369 case R_PPC_DTPREL16_LO:
4370 case R_PPC_DTPREL16_HI:
4371 case R_PPC_DTPREL16_HA:
4372 case R_PPC_TOC16:
4373 break;
4374
4375 case R_PPC_REL16:
4376 case R_PPC_REL16_LO:
4377 case R_PPC_REL16_HI:
4378 case R_PPC_REL16_HA:
4379 case R_PPC_REL16DX_HA:
4380 ppc_elf_tdata (abfd)->has_rel16 = 1;
4381 break;
4382
4383 /* These are just markers. */
4384 case R_PPC_TLS:
4385 case R_PPC_EMB_MRKREF:
4386 case R_PPC_NONE:
4387 case R_PPC_max:
4388 case R_PPC_RELAX:
4389 case R_PPC_RELAX_PLT:
4390 case R_PPC_RELAX_PLTREL24:
4391 case R_PPC_16DX_HA:
4392 break;
4393
4394 /* These should only appear in dynamic objects. */
4395 case R_PPC_COPY:
4396 case R_PPC_GLOB_DAT:
4397 case R_PPC_JMP_SLOT:
4398 case R_PPC_RELATIVE:
4399 case R_PPC_IRELATIVE:
4400 break;
4401
4402 /* These aren't handled yet. We'll report an error later. */
4403 case R_PPC_ADDR30:
4404 case R_PPC_EMB_RELSEC16:
4405 case R_PPC_EMB_RELST_LO:
4406 case R_PPC_EMB_RELST_HI:
4407 case R_PPC_EMB_RELST_HA:
4408 case R_PPC_EMB_BIT_FLD:
4409 break;
4410
4411 /* This refers only to functions defined in the shared library. */
4412 case R_PPC_LOCAL24PC:
4413 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4414 {
4415 htab->plt_type = PLT_OLD;
4416 htab->old_bfd = abfd;
4417 }
4418 if (h != NULL && h->type == STT_GNU_IFUNC)
4419 {
4420 h->needs_plt = 1;
4421 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4422 return FALSE;
4423 }
4424 break;
4425
4426 /* This relocation describes the C++ object vtable hierarchy.
4427 Reconstruct it for later use during GC. */
4428 case R_PPC_GNU_VTINHERIT:
4429 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4430 return FALSE;
4431 break;
4432
4433 /* This relocation describes which C++ vtable entries are actually
4434 used. Record for later use during GC. */
4435 case R_PPC_GNU_VTENTRY:
4436 BFD_ASSERT (h != NULL);
4437 if (h != NULL
4438 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4439 return FALSE;
4440 break;
4441
4442 /* We shouldn't really be seeing TPREL32. */
4443 case R_PPC_TPREL32:
4444 case R_PPC_TPREL16:
4445 case R_PPC_TPREL16_LO:
4446 case R_PPC_TPREL16_HI:
4447 case R_PPC_TPREL16_HA:
4448 if (bfd_link_dll (info))
4449 info->flags |= DF_STATIC_TLS;
4450 goto dodyn;
4451
4452 /* Nor these. */
4453 case R_PPC_DTPMOD32:
4454 case R_PPC_DTPREL32:
4455 goto dodyn;
4456
4457 case R_PPC_REL32:
4458 if (h == NULL
4459 && got2 != NULL
4460 && (sec->flags & SEC_CODE) != 0
4461 && bfd_link_pic (info)
4462 && htab->plt_type == PLT_UNSET)
4463 {
4464 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4465 the start of a function, which assembles to a REL32
4466 reference to .got2. If we detect one of these, then
4467 force the old PLT layout because the linker cannot
4468 reliably deduce the GOT pointer value needed for
4469 PLT call stubs. */
4470 asection *s;
4471 Elf_Internal_Sym *isym;
4472
4473 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4474 abfd, r_symndx);
4475 if (isym == NULL)
4476 return FALSE;
4477
4478 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4479 if (s == got2)
4480 {
4481 htab->plt_type = PLT_OLD;
4482 htab->old_bfd = abfd;
4483 }
4484 }
4485 if (h == NULL || h == htab->elf.hgot)
4486 break;
4487 /* fall through */
4488
4489 case R_PPC_ADDR32:
4490 case R_PPC_ADDR16:
4491 case R_PPC_ADDR16_LO:
4492 case R_PPC_ADDR16_HI:
4493 case R_PPC_ADDR16_HA:
4494 case R_PPC_UADDR32:
4495 case R_PPC_UADDR16:
4496 if (h != NULL && !bfd_link_pic (info))
4497 {
4498 /* We may need a plt entry if the symbol turns out to be
4499 a function defined in a dynamic object. */
4500 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4501 return FALSE;
4502
4503 /* We may need a copy reloc too. */
4504 h->non_got_ref = 1;
4505 h->pointer_equality_needed = 1;
4506 if (r_type == R_PPC_ADDR16_HA)
4507 ppc_elf_hash_entry (h)->has_addr16_ha = 1;
4508 if (r_type == R_PPC_ADDR16_LO)
4509 ppc_elf_hash_entry (h)->has_addr16_lo = 1;
4510 }
4511 goto dodyn;
4512
4513 case R_PPC_REL24:
4514 case R_PPC_REL14:
4515 case R_PPC_REL14_BRTAKEN:
4516 case R_PPC_REL14_BRNTAKEN:
4517 if (h == NULL)
4518 break;
4519 if (h == htab->elf.hgot)
4520 {
4521 if (htab->plt_type == PLT_UNSET)
4522 {
4523 htab->plt_type = PLT_OLD;
4524 htab->old_bfd = abfd;
4525 }
4526 break;
4527 }
4528 /* fall through */
4529
4530 case R_PPC_ADDR24:
4531 case R_PPC_ADDR14:
4532 case R_PPC_ADDR14_BRTAKEN:
4533 case R_PPC_ADDR14_BRNTAKEN:
4534 if (h != NULL && !bfd_link_pic (info))
4535 {
4536 /* We may need a plt entry if the symbol turns out to be
4537 a function defined in a dynamic object. */
4538 h->needs_plt = 1;
4539 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4540 return FALSE;
4541 break;
4542 }
4543
4544 dodyn:
4545 /* If we are creating a shared library, and this is a reloc
4546 against a global symbol, or a non PC relative reloc
4547 against a local symbol, then we need to copy the reloc
4548 into the shared library. However, if we are linking with
4549 -Bsymbolic, we do not need to copy a reloc against a
4550 global symbol which is defined in an object we are
4551 including in the link (i.e., DEF_REGULAR is set). At
4552 this point we have not seen all the input files, so it is
4553 possible that DEF_REGULAR is not set now but will be set
4554 later (it is never cleared). In case of a weak definition,
4555 DEF_REGULAR may be cleared later by a strong definition in
4556 a shared library. We account for that possibility below by
4557 storing information in the dyn_relocs field of the hash
4558 table entry. A similar situation occurs when creating
4559 shared libraries and symbol visibility changes render the
4560 symbol local.
4561
4562 If on the other hand, we are creating an executable, we
4563 may need to keep relocations for symbols satisfied by a
4564 dynamic library if we manage to avoid copy relocs for the
4565 symbol. */
4566 if ((bfd_link_pic (info)
4567 && (must_be_dyn_reloc (info, r_type)
4568 || (h != NULL
4569 && (!SYMBOLIC_BIND (info, h)
4570 || h->root.type == bfd_link_hash_defweak
4571 || !h->def_regular))))
4572 || (ELIMINATE_COPY_RELOCS
4573 && !bfd_link_pic (info)
4574 && h != NULL
4575 && (h->root.type == bfd_link_hash_defweak
4576 || !h->def_regular)))
4577 {
4578 #ifdef DEBUG
4579 fprintf (stderr,
4580 "ppc_elf_check_relocs needs to "
4581 "create relocation for %s\n",
4582 (h && h->root.root.string
4583 ? h->root.root.string : "<unknown>"));
4584 #endif
4585 if (sreloc == NULL)
4586 {
4587 if (htab->elf.dynobj == NULL)
4588 htab->elf.dynobj = abfd;
4589
4590 sreloc = _bfd_elf_make_dynamic_reloc_section
4591 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4592
4593 if (sreloc == NULL)
4594 return FALSE;
4595 }
4596
4597 /* If this is a global symbol, we count the number of
4598 relocations we need for this symbol. */
4599 if (h != NULL)
4600 {
4601 struct elf_dyn_relocs *p;
4602 struct elf_dyn_relocs **rel_head;
4603
4604 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4605 p = *rel_head;
4606 if (p == NULL || p->sec != sec)
4607 {
4608 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4609 if (p == NULL)
4610 return FALSE;
4611 p->next = *rel_head;
4612 *rel_head = p;
4613 p->sec = sec;
4614 p->count = 0;
4615 p->pc_count = 0;
4616 }
4617 p->count += 1;
4618 if (!must_be_dyn_reloc (info, r_type))
4619 p->pc_count += 1;
4620 }
4621 else
4622 {
4623 /* Track dynamic relocs needed for local syms too.
4624 We really need local syms available to do this
4625 easily. Oh well. */
4626 struct ppc_dyn_relocs *p;
4627 struct ppc_dyn_relocs **rel_head;
4628 bfd_boolean is_ifunc;
4629 asection *s;
4630 void *vpp;
4631 Elf_Internal_Sym *isym;
4632
4633 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4634 abfd, r_symndx);
4635 if (isym == NULL)
4636 return FALSE;
4637
4638 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4639 if (s == NULL)
4640 s = sec;
4641
4642 vpp = &elf_section_data (s)->local_dynrel;
4643 rel_head = (struct ppc_dyn_relocs **) vpp;
4644 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4645 p = *rel_head;
4646 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4647 p = p->next;
4648 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4649 {
4650 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4651 if (p == NULL)
4652 return FALSE;
4653 p->next = *rel_head;
4654 *rel_head = p;
4655 p->sec = sec;
4656 p->ifunc = is_ifunc;
4657 p->count = 0;
4658 }
4659 p->count += 1;
4660 }
4661 }
4662
4663 break;
4664 }
4665 }
4666
4667 return TRUE;
4668 }
4669 \f
4670 /* Warn for conflicting Tag_GNU_Power_ABI_FP attributes between IBFD
4671 and OBFD, and merge non-conflicting ones. */
4672 void
4673 _bfd_elf_ppc_merge_fp_attributes (bfd *ibfd, struct bfd_link_info *info)
4674 {
4675 bfd *obfd = info->output_bfd;
4676 obj_attribute *in_attr, *in_attrs;
4677 obj_attribute *out_attr, *out_attrs;
4678
4679 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4680 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4681
4682 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4683 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4684
4685 if (in_attr->i != out_attr->i)
4686 {
4687 int in_fp = in_attr->i & 3;
4688 int out_fp = out_attr->i & 3;
4689
4690 if (in_fp == 0)
4691 ;
4692 else if (out_fp == 0)
4693 {
4694 out_attr->type = 1;
4695 out_attr->i ^= in_fp;
4696 }
4697 else if (out_fp != 2 && in_fp == 2)
4698 _bfd_error_handler
4699 /* xgettext:c-format */
4700 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4701 else if (out_fp == 2 && in_fp != 2)
4702 _bfd_error_handler
4703 /* xgettext:c-format */
4704 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4705 else if (out_fp == 1 && in_fp == 3)
4706 _bfd_error_handler
4707 /* xgettext:c-format */
4708 (_("Warning: %B uses double-precision hard float, "
4709 "%B uses single-precision hard float"), obfd, ibfd);
4710 else if (out_fp == 3 && in_fp == 1)
4711 _bfd_error_handler
4712 /* xgettext:c-format */
4713 (_("Warning: %B uses double-precision hard float, "
4714 "%B uses single-precision hard float"), ibfd, obfd);
4715
4716 in_fp = in_attr->i & 0xc;
4717 out_fp = out_attr->i & 0xc;
4718 if (in_fp == 0)
4719 ;
4720 else if (out_fp == 0)
4721 {
4722 out_attr->type = 1;
4723 out_attr->i ^= in_fp;
4724 }
4725 else if (out_fp != 2 * 4 && in_fp == 2 * 4)
4726 _bfd_error_handler
4727 /* xgettext:c-format */
4728 (_("Warning: %B uses 64-bit long double, "
4729 "%B uses 128-bit long double"), ibfd, obfd);
4730 else if (in_fp != 2 * 4 && out_fp == 2 * 4)
4731 _bfd_error_handler
4732 /* xgettext:c-format */
4733 (_("Warning: %B uses 64-bit long double, "
4734 "%B uses 128-bit long double"), obfd, ibfd);
4735 else if (out_fp == 1 * 4 && in_fp == 3 * 4)
4736 _bfd_error_handler
4737 /* xgettext:c-format */
4738 (_("Warning: %B uses IBM long double, "
4739 "%B uses IEEE long double"), ibfd, obfd);
4740 else if (out_fp == 3 * 4 && in_fp == 1 * 4)
4741 _bfd_error_handler
4742 /* xgettext:c-format */
4743 (_("Warning: %B uses IBM long double, "
4744 "%B uses IEEE long double"), obfd, ibfd);
4745 }
4746 }
4747
4748 /* Merge object attributes from IBFD into OBFD. Warn if
4749 there are conflicting attributes. */
4750 static bfd_boolean
4751 ppc_elf_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
4752 {
4753 bfd *obfd;
4754 obj_attribute *in_attr, *in_attrs;
4755 obj_attribute *out_attr, *out_attrs;
4756
4757 _bfd_elf_ppc_merge_fp_attributes (ibfd, info);
4758
4759 obfd = info->output_bfd;
4760 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4761 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4762
4763 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4764 merge non-conflicting ones. */
4765 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4766 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4767 if (in_attr->i != out_attr->i)
4768 {
4769 int in_vec = in_attr->i & 3;
4770 int out_vec = out_attr->i & 3;
4771
4772 if (in_vec == 0)
4773 ;
4774 else if (out_vec == 0)
4775 {
4776 out_attr->type = 1;
4777 out_attr->i = in_vec;
4778 }
4779 /* For now, allow generic to transition to AltiVec or SPE
4780 without a warning. If GCC marked files with their stack
4781 alignment and used don't-care markings for files which are
4782 not affected by the vector ABI, we could warn about this
4783 case too. */
4784 else if (in_vec == 1)
4785 ;
4786 else if (out_vec == 1)
4787 {
4788 out_attr->type = 1;
4789 out_attr->i = in_vec;
4790 }
4791 else if (out_vec < in_vec)
4792 _bfd_error_handler
4793 /* xgettext:c-format */
4794 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4795 obfd, ibfd);
4796 else if (out_vec > in_vec)
4797 _bfd_error_handler
4798 /* xgettext:c-format */
4799 (_("Warning: %B uses AltiVec vector ABI, %B uses SPE vector ABI"),
4800 ibfd, obfd);
4801 }
4802
4803 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4804 and merge non-conflicting ones. */
4805 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4806 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4807 if (in_attr->i != out_attr->i)
4808 {
4809 int in_struct = in_attr->i & 3;
4810 int out_struct = out_attr->i & 3;
4811
4812 if (in_struct == 0 || in_struct == 3)
4813 ;
4814 else if (out_struct == 0)
4815 {
4816 out_attr->type = 1;
4817 out_attr->i = in_struct;
4818 }
4819 else if (out_struct < in_struct)
4820 _bfd_error_handler
4821 /* xgettext:c-format */
4822 (_("Warning: %B uses r3/r4 for small structure returns, "
4823 "%B uses memory"), obfd, ibfd);
4824 else if (out_struct > in_struct)
4825 _bfd_error_handler
4826 /* xgettext:c-format */
4827 (_("Warning: %B uses r3/r4 for small structure returns, "
4828 "%B uses memory"), ibfd, obfd);
4829 }
4830
4831 /* Merge Tag_compatibility attributes and any common GNU ones. */
4832 _bfd_elf_merge_object_attributes (ibfd, info);
4833
4834 return TRUE;
4835 }
4836
4837 /* Merge backend specific data from an object file to the output
4838 object file when linking. */
4839
4840 static bfd_boolean
4841 ppc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4842 {
4843 bfd *obfd = info->output_bfd;
4844 flagword old_flags;
4845 flagword new_flags;
4846 bfd_boolean error;
4847
4848 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4849 return TRUE;
4850
4851 /* Check if we have the same endianness. */
4852 if (! _bfd_generic_verify_endian_match (ibfd, info))
4853 return FALSE;
4854
4855 if (!ppc_elf_merge_obj_attributes (ibfd, info))
4856 return FALSE;
4857
4858 new_flags = elf_elfheader (ibfd)->e_flags;
4859 old_flags = elf_elfheader (obfd)->e_flags;
4860 if (!elf_flags_init (obfd))
4861 {
4862 /* First call, no flags set. */
4863 elf_flags_init (obfd) = TRUE;
4864 elf_elfheader (obfd)->e_flags = new_flags;
4865 }
4866
4867 /* Compatible flags are ok. */
4868 else if (new_flags == old_flags)
4869 ;
4870
4871 /* Incompatible flags. */
4872 else
4873 {
4874 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4875 to be linked with either. */
4876 error = FALSE;
4877 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4878 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4879 {
4880 error = TRUE;
4881 _bfd_error_handler
4882 (_("%B: compiled with -mrelocatable and linked with "
4883 "modules compiled normally"), ibfd);
4884 }
4885 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4886 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4887 {
4888 error = TRUE;
4889 _bfd_error_handler
4890 (_("%B: compiled normally and linked with "
4891 "modules compiled with -mrelocatable"), ibfd);
4892 }
4893
4894 /* The output is -mrelocatable-lib iff both the input files are. */
4895 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4896 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4897
4898 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4899 but each input file is either -mrelocatable or -mrelocatable-lib. */
4900 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4901 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4902 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4903 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4904
4905 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4906 any module uses it. */
4907 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4908
4909 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4910 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4911
4912 /* Warn about any other mismatches. */
4913 if (new_flags != old_flags)
4914 {
4915 error = TRUE;
4916 _bfd_error_handler
4917 /* xgettext:c-format */
4918 (_("%B: uses different e_flags (%#x) fields "
4919 "than previous modules (%#x)"),
4920 ibfd, new_flags, old_flags);
4921 }
4922
4923 if (error)
4924 {
4925 bfd_set_error (bfd_error_bad_value);
4926 return FALSE;
4927 }
4928 }
4929
4930 return TRUE;
4931 }
4932
4933 static void
4934 ppc_elf_vle_split16 (bfd *input_bfd,
4935 asection *input_section,
4936 unsigned long offset,
4937 bfd_byte *loc,
4938 bfd_vma value,
4939 split16_format_type split16_format,
4940 bfd_boolean fixup)
4941 {
4942 unsigned int insn, opcode, top5;
4943
4944 insn = bfd_get_32 (input_bfd, loc);
4945 opcode = insn & 0xfc00f800;
4946 if (opcode == E_OR2I_INSN
4947 || opcode == E_AND2I_DOT_INSN
4948 || opcode == E_OR2IS_INSN
4949 || opcode == E_LIS_INSN
4950 || opcode == E_AND2IS_DOT_INSN)
4951 {
4952 if (split16_format != split16a_type)
4953 {
4954 if (fixup)
4955 split16_format = split16a_type;
4956 else
4957 _bfd_error_handler
4958 /* xgettext:c-format */
4959 (_("%B(%A+0x%lx): expected 16A style relocation on 0x%08x insn"),
4960 input_bfd, input_section, offset, opcode);
4961 }
4962 }
4963 else if (opcode == E_ADD2I_DOT_INSN
4964 || opcode == E_ADD2IS_INSN
4965 || opcode == E_CMP16I_INSN
4966 || opcode == E_MULL2I_INSN
4967 || opcode == E_CMPL16I_INSN
4968 || opcode == E_CMPH16I_INSN
4969 || opcode == E_CMPHL16I_INSN)
4970 {
4971 if (split16_format != split16d_type)
4972 {
4973 if (fixup)
4974 split16_format = split16d_type;
4975 else
4976 _bfd_error_handler
4977 /* xgettext:c-format */
4978 (_("%B(%A+0x%lx): expected 16D style relocation on 0x%08x insn"),
4979 input_bfd, input_section, offset, opcode);
4980 }
4981 }
4982 top5 = value & 0xf800;
4983 top5 = top5 << (split16_format == split16a_type ? 5 : 10);
4984 insn &= (split16_format == split16a_type ? ~0x1f07ff : ~0x3e007ff);
4985 insn |= top5;
4986 insn |= value & 0x7ff;
4987 bfd_put_32 (input_bfd, insn, loc);
4988 }
4989 \f
4990 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4991 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4992 int
4993 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4994 struct bfd_link_info *info)
4995 {
4996 struct ppc_elf_link_hash_table *htab;
4997 flagword flags;
4998
4999 htab = ppc_elf_hash_table (info);
5000
5001 if (htab->plt_type == PLT_UNSET)
5002 {
5003 struct elf_link_hash_entry *h;
5004
5005 if (htab->params->plt_style == PLT_OLD)
5006 htab->plt_type = PLT_OLD;
5007 else if (bfd_link_pic (info)
5008 && htab->elf.dynamic_sections_created
5009 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
5010 FALSE, FALSE, TRUE)) != NULL
5011 && (h->type == STT_FUNC
5012 || h->needs_plt)
5013 && h->ref_regular
5014 && !(SYMBOL_CALLS_LOCAL (info, h)
5015 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
5016 {
5017 /* Profiling of shared libs (and pies) is not supported with
5018 secure plt, because ppc32 does profiling before a
5019 function prologue and a secure plt pic call stubs needs
5020 r30 to be set up. */
5021 htab->plt_type = PLT_OLD;
5022 }
5023 else
5024 {
5025 bfd *ibfd;
5026 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
5027
5028 /* Look through the reloc flags left by ppc_elf_check_relocs.
5029 Use the old style bss plt if a file makes plt calls
5030 without using the new relocs, and if ld isn't given
5031 --secure-plt and we never see REL16 relocs. */
5032 if (plt_type == PLT_UNSET)
5033 plt_type = PLT_OLD;
5034 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
5035 if (is_ppc_elf (ibfd))
5036 {
5037 if (ppc_elf_tdata (ibfd)->has_rel16)
5038 plt_type = PLT_NEW;
5039 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
5040 {
5041 plt_type = PLT_OLD;
5042 htab->old_bfd = ibfd;
5043 break;
5044 }
5045 }
5046 htab->plt_type = plt_type;
5047 }
5048 }
5049 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
5050 {
5051 if (htab->old_bfd != NULL)
5052 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
5053 htab->old_bfd);
5054 else
5055 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
5056 }
5057
5058 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
5059
5060 if (htab->plt_type == PLT_NEW)
5061 {
5062 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
5063 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
5064
5065 /* The new PLT is a loaded section. */
5066 if (htab->elf.splt != NULL
5067 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.splt, flags))
5068 return -1;
5069
5070 /* The new GOT is not executable. */
5071 if (htab->elf.sgot != NULL
5072 && !bfd_set_section_flags (htab->elf.dynobj, htab->elf.sgot, flags))
5073 return -1;
5074 }
5075 else
5076 {
5077 /* Stop an unused .glink section from affecting .text alignment. */
5078 if (htab->glink != NULL
5079 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
5080 return -1;
5081 }
5082 return htab->plt_type == PLT_NEW;
5083 }
5084 \f
5085 /* Return the section that should be marked against GC for a given
5086 relocation. */
5087
5088 static asection *
5089 ppc_elf_gc_mark_hook (asection *sec,
5090 struct bfd_link_info *info,
5091 Elf_Internal_Rela *rel,
5092 struct elf_link_hash_entry *h,
5093 Elf_Internal_Sym *sym)
5094 {
5095 if (h != NULL)
5096 switch (ELF32_R_TYPE (rel->r_info))
5097 {
5098 case R_PPC_GNU_VTINHERIT:
5099 case R_PPC_GNU_VTENTRY:
5100 return NULL;
5101 }
5102
5103 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
5104 }
5105
5106 /* Update the got, plt and dynamic reloc reference counts for the
5107 section being removed. */
5108
5109 static bfd_boolean
5110 ppc_elf_gc_sweep_hook (bfd *abfd,
5111 struct bfd_link_info *info,
5112 asection *sec,
5113 const Elf_Internal_Rela *relocs)
5114 {
5115 struct ppc_elf_link_hash_table *htab;
5116 Elf_Internal_Shdr *symtab_hdr;
5117 struct elf_link_hash_entry **sym_hashes;
5118 bfd_signed_vma *local_got_refcounts;
5119 const Elf_Internal_Rela *rel, *relend;
5120 asection *got2;
5121
5122 if (bfd_link_relocatable (info))
5123 return TRUE;
5124
5125 if ((sec->flags & SEC_ALLOC) == 0)
5126 return TRUE;
5127
5128 elf_section_data (sec)->local_dynrel = NULL;
5129
5130 htab = ppc_elf_hash_table (info);
5131 symtab_hdr = &elf_symtab_hdr (abfd);
5132 sym_hashes = elf_sym_hashes (abfd);
5133 local_got_refcounts = elf_local_got_refcounts (abfd);
5134 got2 = bfd_get_section_by_name (abfd, ".got2");
5135
5136 relend = relocs + sec->reloc_count;
5137 for (rel = relocs; rel < relend; rel++)
5138 {
5139 unsigned long r_symndx;
5140 enum elf_ppc_reloc_type r_type;
5141 struct elf_link_hash_entry *h = NULL;
5142
5143 r_symndx = ELF32_R_SYM (rel->r_info);
5144 if (r_symndx >= symtab_hdr->sh_info)
5145 {
5146 struct elf_dyn_relocs **pp, *p;
5147 struct ppc_elf_link_hash_entry *eh;
5148
5149 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5150 while (h->root.type == bfd_link_hash_indirect
5151 || h->root.type == bfd_link_hash_warning)
5152 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5153 eh = (struct ppc_elf_link_hash_entry *) h;
5154
5155 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5156 if (p->sec == sec)
5157 {
5158 /* Everything must go for SEC. */
5159 *pp = p->next;
5160 break;
5161 }
5162 }
5163
5164 r_type = ELF32_R_TYPE (rel->r_info);
5165 if (!htab->is_vxworks
5166 && h == NULL
5167 && local_got_refcounts != NULL
5168 && (!bfd_link_pic (info)
5169 || is_branch_reloc (r_type)))
5170 {
5171 struct plt_entry **local_plt = (struct plt_entry **)
5172 (local_got_refcounts + symtab_hdr->sh_info);
5173 char *local_got_tls_masks = (char *)
5174 (local_plt + symtab_hdr->sh_info);
5175 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
5176 {
5177 struct plt_entry **ifunc = local_plt + r_symndx;
5178 bfd_vma addend = 0;
5179 struct plt_entry *ent;
5180
5181 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5182 addend = rel->r_addend;
5183 ent = find_plt_ent (ifunc, got2, addend);
5184 if (ent->plt.refcount > 0)
5185 ent->plt.refcount -= 1;
5186 continue;
5187 }
5188 }
5189
5190 switch (r_type)
5191 {
5192 case R_PPC_GOT_TLSLD16:
5193 case R_PPC_GOT_TLSLD16_LO:
5194 case R_PPC_GOT_TLSLD16_HI:
5195 case R_PPC_GOT_TLSLD16_HA:
5196 case R_PPC_GOT_TLSGD16:
5197 case R_PPC_GOT_TLSGD16_LO:
5198 case R_PPC_GOT_TLSGD16_HI:
5199 case R_PPC_GOT_TLSGD16_HA:
5200 case R_PPC_GOT_TPREL16:
5201 case R_PPC_GOT_TPREL16_LO:
5202 case R_PPC_GOT_TPREL16_HI:
5203 case R_PPC_GOT_TPREL16_HA:
5204 case R_PPC_GOT_DTPREL16:
5205 case R_PPC_GOT_DTPREL16_LO:
5206 case R_PPC_GOT_DTPREL16_HI:
5207 case R_PPC_GOT_DTPREL16_HA:
5208 case R_PPC_GOT16:
5209 case R_PPC_GOT16_LO:
5210 case R_PPC_GOT16_HI:
5211 case R_PPC_GOT16_HA:
5212 if (h != NULL)
5213 {
5214 if (h->got.refcount > 0)
5215 h->got.refcount--;
5216 if (!bfd_link_pic (info))
5217 {
5218 struct plt_entry *ent;
5219
5220 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5221 if (ent != NULL && ent->plt.refcount > 0)
5222 ent->plt.refcount -= 1;
5223 }
5224 }
5225 else if (local_got_refcounts != NULL)
5226 {
5227 if (local_got_refcounts[r_symndx] > 0)
5228 local_got_refcounts[r_symndx]--;
5229 }
5230 break;
5231
5232 case R_PPC_REL24:
5233 case R_PPC_REL14:
5234 case R_PPC_REL14_BRTAKEN:
5235 case R_PPC_REL14_BRNTAKEN:
5236 case R_PPC_REL32:
5237 if (h == NULL || h == htab->elf.hgot)
5238 break;
5239 /* Fall through. */
5240
5241 case R_PPC_ADDR32:
5242 case R_PPC_ADDR24:
5243 case R_PPC_ADDR16:
5244 case R_PPC_ADDR16_LO:
5245 case R_PPC_ADDR16_HI:
5246 case R_PPC_ADDR16_HA:
5247 case R_PPC_ADDR14:
5248 case R_PPC_ADDR14_BRTAKEN:
5249 case R_PPC_ADDR14_BRNTAKEN:
5250 case R_PPC_UADDR32:
5251 case R_PPC_UADDR16:
5252 if (bfd_link_pic (info))
5253 break;
5254 /* Fall through. */
5255
5256 case R_PPC_PLT32:
5257 case R_PPC_PLTREL24:
5258 case R_PPC_PLTREL32:
5259 case R_PPC_PLT16_LO:
5260 case R_PPC_PLT16_HI:
5261 case R_PPC_PLT16_HA:
5262 if (h != NULL)
5263 {
5264 bfd_vma addend = 0;
5265 struct plt_entry *ent;
5266
5267 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
5268 addend = rel->r_addend;
5269 ent = find_plt_ent (&h->plt.plist, got2, addend);
5270 if (ent != NULL && ent->plt.refcount > 0)
5271 ent->plt.refcount -= 1;
5272 }
5273 break;
5274
5275 default:
5276 break;
5277 }
5278 }
5279 return TRUE;
5280 }
5281 \f
5282 /* Set plt output section type, htab->tls_get_addr, and call the
5283 generic ELF tls_setup function. */
5284
5285 asection *
5286 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5287 {
5288 struct ppc_elf_link_hash_table *htab;
5289
5290 htab = ppc_elf_hash_table (info);
5291 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5292 FALSE, FALSE, TRUE);
5293 if (htab->plt_type != PLT_NEW)
5294 htab->params->no_tls_get_addr_opt = TRUE;
5295
5296 if (!htab->params->no_tls_get_addr_opt)
5297 {
5298 struct elf_link_hash_entry *opt, *tga;
5299 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5300 FALSE, FALSE, TRUE);
5301 if (opt != NULL
5302 && (opt->root.type == bfd_link_hash_defined
5303 || opt->root.type == bfd_link_hash_defweak))
5304 {
5305 /* If glibc supports an optimized __tls_get_addr call stub,
5306 signalled by the presence of __tls_get_addr_opt, and we'll
5307 be calling __tls_get_addr via a plt call stub, then
5308 make __tls_get_addr point to __tls_get_addr_opt. */
5309 tga = htab->tls_get_addr;
5310 if (htab->elf.dynamic_sections_created
5311 && tga != NULL
5312 && (tga->type == STT_FUNC
5313 || tga->needs_plt)
5314 && !(SYMBOL_CALLS_LOCAL (info, tga)
5315 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga)))
5316 {
5317 struct plt_entry *ent;
5318 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5319 if (ent->plt.refcount > 0)
5320 break;
5321 if (ent != NULL)
5322 {
5323 tga->root.type = bfd_link_hash_indirect;
5324 tga->root.u.i.link = &opt->root;
5325 ppc_elf_copy_indirect_symbol (info, opt, tga);
5326 opt->mark = 1;
5327 if (opt->dynindx != -1)
5328 {
5329 /* Use __tls_get_addr_opt in dynamic relocations. */
5330 opt->dynindx = -1;
5331 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5332 opt->dynstr_index);
5333 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5334 return FALSE;
5335 }
5336 htab->tls_get_addr = opt;
5337 }
5338 }
5339 }
5340 else
5341 htab->params->no_tls_get_addr_opt = TRUE;
5342 }
5343 if (htab->plt_type == PLT_NEW
5344 && htab->elf.splt != NULL
5345 && htab->elf.splt->output_section != NULL)
5346 {
5347 elf_section_type (htab->elf.splt->output_section) = SHT_PROGBITS;
5348 elf_section_flags (htab->elf.splt->output_section) = SHF_ALLOC + SHF_WRITE;
5349 }
5350
5351 return _bfd_elf_tls_setup (obfd, info);
5352 }
5353
5354 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5355 HASH. */
5356
5357 static bfd_boolean
5358 branch_reloc_hash_match (const bfd *ibfd,
5359 const Elf_Internal_Rela *rel,
5360 const struct elf_link_hash_entry *hash)
5361 {
5362 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5363 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5364 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5365
5366 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5367 {
5368 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5369 struct elf_link_hash_entry *h;
5370
5371 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5372 while (h->root.type == bfd_link_hash_indirect
5373 || h->root.type == bfd_link_hash_warning)
5374 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5375 if (h == hash)
5376 return TRUE;
5377 }
5378 return FALSE;
5379 }
5380
5381 /* Run through all the TLS relocs looking for optimization
5382 opportunities. */
5383
5384 bfd_boolean
5385 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5386 struct bfd_link_info *info)
5387 {
5388 bfd *ibfd;
5389 asection *sec;
5390 struct ppc_elf_link_hash_table *htab;
5391 int pass;
5392
5393 if (!bfd_link_executable (info))
5394 return TRUE;
5395
5396 htab = ppc_elf_hash_table (info);
5397 if (htab == NULL)
5398 return FALSE;
5399
5400 /* Make two passes through the relocs. First time check that tls
5401 relocs involved in setting up a tls_get_addr call are indeed
5402 followed by such a call. If they are not, don't do any tls
5403 optimization. On the second pass twiddle tls_mask flags to
5404 notify relocate_section that optimization can be done, and
5405 adjust got and plt refcounts. */
5406 for (pass = 0; pass < 2; ++pass)
5407 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
5408 {
5409 Elf_Internal_Sym *locsyms = NULL;
5410 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5411 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5412
5413 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5414 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5415 {
5416 Elf_Internal_Rela *relstart, *rel, *relend;
5417 int expecting_tls_get_addr = 0;
5418
5419 /* Read the relocations. */
5420 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5421 info->keep_memory);
5422 if (relstart == NULL)
5423 return FALSE;
5424
5425 relend = relstart + sec->reloc_count;
5426 for (rel = relstart; rel < relend; rel++)
5427 {
5428 enum elf_ppc_reloc_type r_type;
5429 unsigned long r_symndx;
5430 struct elf_link_hash_entry *h = NULL;
5431 char *tls_mask;
5432 char tls_set, tls_clear;
5433 bfd_boolean is_local;
5434 bfd_signed_vma *got_count;
5435
5436 r_symndx = ELF32_R_SYM (rel->r_info);
5437 if (r_symndx >= symtab_hdr->sh_info)
5438 {
5439 struct elf_link_hash_entry **sym_hashes;
5440
5441 sym_hashes = elf_sym_hashes (ibfd);
5442 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5443 while (h->root.type == bfd_link_hash_indirect
5444 || h->root.type == bfd_link_hash_warning)
5445 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5446 }
5447
5448 is_local = FALSE;
5449 if (h == NULL
5450 || !h->def_dynamic)
5451 is_local = TRUE;
5452
5453 r_type = ELF32_R_TYPE (rel->r_info);
5454 /* If this section has old-style __tls_get_addr calls
5455 without marker relocs, then check that each
5456 __tls_get_addr call reloc is preceded by a reloc
5457 that conceivably belongs to the __tls_get_addr arg
5458 setup insn. If we don't find matching arg setup
5459 relocs, don't do any tls optimization. */
5460 if (pass == 0
5461 && sec->has_tls_get_addr_call
5462 && h != NULL
5463 && h == htab->tls_get_addr
5464 && !expecting_tls_get_addr
5465 && is_branch_reloc (r_type))
5466 {
5467 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5468 "TLS optimization disabled\n",
5469 ibfd, sec, rel->r_offset);
5470 if (elf_section_data (sec)->relocs != relstart)
5471 free (relstart);
5472 return TRUE;
5473 }
5474
5475 expecting_tls_get_addr = 0;
5476 switch (r_type)
5477 {
5478 case R_PPC_GOT_TLSLD16:
5479 case R_PPC_GOT_TLSLD16_LO:
5480 expecting_tls_get_addr = 1;
5481 /* Fall through. */
5482
5483 case R_PPC_GOT_TLSLD16_HI:
5484 case R_PPC_GOT_TLSLD16_HA:
5485 /* These relocs should never be against a symbol
5486 defined in a shared lib. Leave them alone if
5487 that turns out to be the case. */
5488 if (!is_local)
5489 continue;
5490
5491 /* LD -> LE */
5492 tls_set = 0;
5493 tls_clear = TLS_LD;
5494 break;
5495
5496 case R_PPC_GOT_TLSGD16:
5497 case R_PPC_GOT_TLSGD16_LO:
5498 expecting_tls_get_addr = 1;
5499 /* Fall through. */
5500
5501 case R_PPC_GOT_TLSGD16_HI:
5502 case R_PPC_GOT_TLSGD16_HA:
5503 if (is_local)
5504 /* GD -> LE */
5505 tls_set = 0;
5506 else
5507 /* GD -> IE */
5508 tls_set = TLS_TLS | TLS_TPRELGD;
5509 tls_clear = TLS_GD;
5510 break;
5511
5512 case R_PPC_GOT_TPREL16:
5513 case R_PPC_GOT_TPREL16_LO:
5514 case R_PPC_GOT_TPREL16_HI:
5515 case R_PPC_GOT_TPREL16_HA:
5516 if (is_local)
5517 {
5518 /* IE -> LE */
5519 tls_set = 0;
5520 tls_clear = TLS_TPREL;
5521 break;
5522 }
5523 else
5524 continue;
5525
5526 case R_PPC_TLSGD:
5527 case R_PPC_TLSLD:
5528 expecting_tls_get_addr = 2;
5529 tls_set = 0;
5530 tls_clear = 0;
5531 break;
5532
5533 default:
5534 continue;
5535 }
5536
5537 if (pass == 0)
5538 {
5539 if (!expecting_tls_get_addr
5540 || (expecting_tls_get_addr == 1
5541 && !sec->has_tls_get_addr_call))
5542 continue;
5543
5544 if (rel + 1 < relend
5545 && branch_reloc_hash_match (ibfd, rel + 1,
5546 htab->tls_get_addr))
5547 continue;
5548
5549 /* Uh oh, we didn't find the expected call. We
5550 could just mark this symbol to exclude it
5551 from tls optimization but it's safer to skip
5552 the entire optimization. */
5553 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5554 "TLS optimization disabled\n"),
5555 ibfd, sec, rel->r_offset);
5556 if (elf_section_data (sec)->relocs != relstart)
5557 free (relstart);
5558 return TRUE;
5559 }
5560
5561 if (expecting_tls_get_addr)
5562 {
5563 struct plt_entry *ent;
5564 bfd_vma addend = 0;
5565
5566 if (bfd_link_pic (info)
5567 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5568 addend = rel[1].r_addend;
5569 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5570 got2, addend);
5571 if (ent != NULL && ent->plt.refcount > 0)
5572 ent->plt.refcount -= 1;
5573
5574 if (expecting_tls_get_addr == 2)
5575 continue;
5576 }
5577
5578 if (h != NULL)
5579 {
5580 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5581 got_count = &h->got.refcount;
5582 }
5583 else
5584 {
5585 bfd_signed_vma *lgot_refs;
5586 struct plt_entry **local_plt;
5587 char *lgot_masks;
5588
5589 if (locsyms == NULL)
5590 {
5591 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5592 if (locsyms == NULL)
5593 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5594 symtab_hdr->sh_info,
5595 0, NULL, NULL, NULL);
5596 if (locsyms == NULL)
5597 {
5598 if (elf_section_data (sec)->relocs != relstart)
5599 free (relstart);
5600 return FALSE;
5601 }
5602 }
5603 lgot_refs = elf_local_got_refcounts (ibfd);
5604 if (lgot_refs == NULL)
5605 abort ();
5606 local_plt = (struct plt_entry **)
5607 (lgot_refs + symtab_hdr->sh_info);
5608 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5609 tls_mask = &lgot_masks[r_symndx];
5610 got_count = &lgot_refs[r_symndx];
5611 }
5612
5613 if (tls_set == 0)
5614 {
5615 /* We managed to get rid of a got entry. */
5616 if (*got_count > 0)
5617 *got_count -= 1;
5618 }
5619
5620 *tls_mask |= tls_set;
5621 *tls_mask &= ~tls_clear;
5622 }
5623
5624 if (elf_section_data (sec)->relocs != relstart)
5625 free (relstart);
5626 }
5627
5628 if (locsyms != NULL
5629 && (symtab_hdr->contents != (unsigned char *) locsyms))
5630 {
5631 if (!info->keep_memory)
5632 free (locsyms);
5633 else
5634 symtab_hdr->contents = (unsigned char *) locsyms;
5635 }
5636 }
5637 htab->do_tls_opt = 1;
5638 return TRUE;
5639 }
5640 \f
5641 /* Return true if we have dynamic relocs that apply to read-only sections. */
5642
5643 static bfd_boolean
5644 readonly_dynrelocs (struct elf_link_hash_entry *h)
5645 {
5646 struct elf_dyn_relocs *p;
5647
5648 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5649 {
5650 asection *s = p->sec->output_section;
5651
5652 if (s != NULL
5653 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5654 == (SEC_READONLY | SEC_ALLOC)))
5655 return TRUE;
5656 }
5657 return FALSE;
5658 }
5659
5660 /* Adjust a symbol defined by a dynamic object and referenced by a
5661 regular object. The current definition is in some section of the
5662 dynamic object, but we're not including those sections. We have to
5663 change the definition to something the rest of the link can
5664 understand. */
5665
5666 static bfd_boolean
5667 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5668 struct elf_link_hash_entry *h)
5669 {
5670 struct ppc_elf_link_hash_table *htab;
5671 asection *s;
5672
5673 #ifdef DEBUG
5674 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5675 h->root.root.string);
5676 #endif
5677
5678 /* Make sure we know what is going on here. */
5679 htab = ppc_elf_hash_table (info);
5680 BFD_ASSERT (htab->elf.dynobj != NULL
5681 && (h->needs_plt
5682 || h->type == STT_GNU_IFUNC
5683 || h->u.weakdef != NULL
5684 || (h->def_dynamic
5685 && h->ref_regular
5686 && !h->def_regular)));
5687
5688 /* Deal with function syms. */
5689 if (h->type == STT_FUNC
5690 || h->type == STT_GNU_IFUNC
5691 || h->needs_plt)
5692 {
5693 /* Clear procedure linkage table information for any symbol that
5694 won't need a .plt entry. */
5695 struct plt_entry *ent;
5696 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5697 if (ent->plt.refcount > 0)
5698 break;
5699 if (ent == NULL
5700 || (h->type != STT_GNU_IFUNC
5701 && (SYMBOL_CALLS_LOCAL (info, h)
5702 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))))
5703 {
5704 /* A PLT entry is not required/allowed when:
5705
5706 1. We are not using ld.so; because then the PLT entry
5707 can't be set up, so we can't use one. In this case,
5708 ppc_elf_adjust_dynamic_symbol won't even be called.
5709
5710 2. GC has rendered the entry unused.
5711
5712 3. We know for certain that a call to this symbol
5713 will go to this object, or will remain undefined. */
5714 h->plt.plist = NULL;
5715 h->needs_plt = 0;
5716 h->pointer_equality_needed = 0;
5717 }
5718 else
5719 {
5720 /* Taking a function's address in a read/write section
5721 doesn't require us to define the function symbol in the
5722 executable on a plt call stub. A dynamic reloc can
5723 be used instead, giving better runtime performance.
5724 (Calls via that function pointer don't need to bounce
5725 through the plt call stub.) Similarly, use a dynamic
5726 reloc for a weak reference when possible, allowing the
5727 resolution of the symbol to be set at load time rather
5728 than link time. */
5729 if ((h->pointer_equality_needed
5730 || (!h->ref_regular_nonweak && h->non_got_ref))
5731 && !htab->is_vxworks
5732 && !ppc_elf_hash_entry (h)->has_sda_refs
5733 && !readonly_dynrelocs (h))
5734 {
5735 h->pointer_equality_needed = 0;
5736 /* After adjust_dynamic_symbol, non_got_ref set in the
5737 non-pic case means that dyn_relocs for this symbol
5738 should be discarded. */
5739 h->non_got_ref = 0;
5740 }
5741 }
5742 h->protected_def = 0;
5743 return TRUE;
5744 }
5745 else
5746 h->plt.plist = NULL;
5747
5748 /* If this is a weak symbol, and there is a real definition, the
5749 processor independent code will have arranged for us to see the
5750 real definition first, and we can just use the same value. */
5751 if (h->u.weakdef != NULL)
5752 {
5753 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5754 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5755 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5756 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5757 if (ELIMINATE_COPY_RELOCS)
5758 h->non_got_ref = h->u.weakdef->non_got_ref;
5759 return TRUE;
5760 }
5761
5762 /* This is a reference to a symbol defined by a dynamic object which
5763 is not a function. */
5764
5765 /* If we are creating a shared library, we must presume that the
5766 only references to the symbol are via the global offset table.
5767 For such cases we need not do anything here; the relocations will
5768 be handled correctly by relocate_section. */
5769 if (bfd_link_pic (info))
5770 {
5771 h->protected_def = 0;
5772 return TRUE;
5773 }
5774
5775 /* If there are no references to this symbol that do not use the
5776 GOT, we don't need to generate a copy reloc. */
5777 if (!h->non_got_ref)
5778 {
5779 h->protected_def = 0;
5780 return TRUE;
5781 }
5782
5783 /* Protected variables do not work with .dynbss. The copy in
5784 .dynbss won't be used by the shared library with the protected
5785 definition for the variable. Editing to PIC, or text relocations
5786 are preferable to an incorrect program. */
5787 if (h->protected_def)
5788 {
5789 if (ELIMINATE_COPY_RELOCS
5790 && ppc_elf_hash_entry (h)->has_addr16_ha
5791 && ppc_elf_hash_entry (h)->has_addr16_lo
5792 && htab->params->pic_fixup == 0
5793 && info->disable_target_specific_optimizations <= 1)
5794 htab->params->pic_fixup = 1;
5795 h->non_got_ref = 0;
5796 return TRUE;
5797 }
5798
5799 /* If -z nocopyreloc was given, we won't generate them either. */
5800 if (info->nocopyreloc)
5801 {
5802 h->non_got_ref = 0;
5803 return TRUE;
5804 }
5805
5806 /* If we didn't find any dynamic relocs in read-only sections, then
5807 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5808 We can't do this if there are any small data relocations. This
5809 doesn't work on VxWorks, where we can not have dynamic
5810 relocations (other than copy and jump slot relocations) in an
5811 executable. */
5812 if (ELIMINATE_COPY_RELOCS
5813 && !ppc_elf_hash_entry (h)->has_sda_refs
5814 && !htab->is_vxworks
5815 && !h->def_regular
5816 && !readonly_dynrelocs (h))
5817 {
5818 h->non_got_ref = 0;
5819 return TRUE;
5820 }
5821
5822 /* We must allocate the symbol in our .dynbss section, which will
5823 become part of the .bss section of the executable. There will be
5824 an entry for this symbol in the .dynsym section. The dynamic
5825 object will contain position independent code, so all references
5826 from the dynamic object to this symbol will go through the global
5827 offset table. The dynamic linker will use the .dynsym entry to
5828 determine the address it must put in the global offset table, so
5829 both the dynamic object and the regular object will refer to the
5830 same memory location for the variable.
5831
5832 Of course, if the symbol is referenced using SDAREL relocs, we
5833 must instead allocate it in .sbss. */
5834
5835 if (ppc_elf_hash_entry (h)->has_sda_refs)
5836 s = htab->dynsbss;
5837 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5838 s = htab->elf.sdynrelro;
5839 else
5840 s = htab->elf.sdynbss;
5841 BFD_ASSERT (s != NULL);
5842
5843 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5844 copy the initial value out of the dynamic object and into the
5845 runtime process image. We need to remember the offset into the
5846 .rela.bss section we are going to use. */
5847 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5848 {
5849 asection *srel;
5850
5851 if (ppc_elf_hash_entry (h)->has_sda_refs)
5852 srel = htab->relsbss;
5853 else if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
5854 srel = htab->elf.sreldynrelro;
5855 else
5856 srel = htab->elf.srelbss;
5857 BFD_ASSERT (srel != NULL);
5858 srel->size += sizeof (Elf32_External_Rela);
5859 h->needs_copy = 1;
5860 }
5861
5862 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5863 }
5864 \f
5865 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5866 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5867 specifying the addend on the plt relocation. For -fpic code, the sym
5868 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5869 xxxxxxxx.got2.plt_pic32.<callee>. */
5870
5871 static bfd_boolean
5872 add_stub_sym (struct plt_entry *ent,
5873 struct elf_link_hash_entry *h,
5874 struct bfd_link_info *info)
5875 {
5876 struct elf_link_hash_entry *sh;
5877 size_t len1, len2, len3;
5878 char *name;
5879 const char *stub;
5880 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5881
5882 if (bfd_link_pic (info))
5883 stub = ".plt_pic32.";
5884 else
5885 stub = ".plt_call32.";
5886
5887 len1 = strlen (h->root.root.string);
5888 len2 = strlen (stub);
5889 len3 = 0;
5890 if (ent->sec)
5891 len3 = strlen (ent->sec->name);
5892 name = bfd_malloc (len1 + len2 + len3 + 9);
5893 if (name == NULL)
5894 return FALSE;
5895 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5896 if (ent->sec)
5897 memcpy (name + 8, ent->sec->name, len3);
5898 memcpy (name + 8 + len3, stub, len2);
5899 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5900 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5901 if (sh == NULL)
5902 return FALSE;
5903 if (sh->root.type == bfd_link_hash_new)
5904 {
5905 sh->root.type = bfd_link_hash_defined;
5906 sh->root.u.def.section = htab->glink;
5907 sh->root.u.def.value = ent->glink_offset;
5908 sh->ref_regular = 1;
5909 sh->def_regular = 1;
5910 sh->ref_regular_nonweak = 1;
5911 sh->forced_local = 1;
5912 sh->non_elf = 0;
5913 sh->root.linker_def = 1;
5914 }
5915 return TRUE;
5916 }
5917
5918 /* Allocate NEED contiguous space in .got, and return the offset.
5919 Handles allocation of the got header when crossing 32k. */
5920
5921 static bfd_vma
5922 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5923 {
5924 bfd_vma where;
5925 unsigned int max_before_header;
5926
5927 if (htab->plt_type == PLT_VXWORKS)
5928 {
5929 where = htab->elf.sgot->size;
5930 htab->elf.sgot->size += need;
5931 }
5932 else
5933 {
5934 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5935 if (need <= htab->got_gap)
5936 {
5937 where = max_before_header - htab->got_gap;
5938 htab->got_gap -= need;
5939 }
5940 else
5941 {
5942 if (htab->elf.sgot->size + need > max_before_header
5943 && htab->elf.sgot->size <= max_before_header)
5944 {
5945 htab->got_gap = max_before_header - htab->elf.sgot->size;
5946 htab->elf.sgot->size = max_before_header + htab->got_header_size;
5947 }
5948 where = htab->elf.sgot->size;
5949 htab->elf.sgot->size += need;
5950 }
5951 }
5952 return where;
5953 }
5954
5955 /* If H is undefined, make it dynamic if that makes sense. */
5956
5957 static bfd_boolean
5958 ensure_undef_dynamic (struct bfd_link_info *info,
5959 struct elf_link_hash_entry *h)
5960 {
5961 struct elf_link_hash_table *htab = elf_hash_table (info);
5962
5963 if (htab->dynamic_sections_created
5964 && ((info->dynamic_undefined_weak != 0
5965 && h->root.type == bfd_link_hash_undefweak)
5966 || h->root.type == bfd_link_hash_undefined)
5967 && h->dynindx == -1
5968 && !h->forced_local
5969 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
5970 return bfd_elf_link_record_dynamic_symbol (info, h);
5971 return TRUE;
5972 }
5973
5974 /* Allocate space in associated reloc sections for dynamic relocs. */
5975
5976 static bfd_boolean
5977 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5978 {
5979 struct bfd_link_info *info = inf;
5980 struct ppc_elf_link_hash_entry *eh;
5981 struct ppc_elf_link_hash_table *htab;
5982 struct elf_dyn_relocs *p;
5983 bfd_boolean dyn;
5984
5985 if (h->root.type == bfd_link_hash_indirect)
5986 return TRUE;
5987
5988 htab = ppc_elf_hash_table (info);
5989 eh = (struct ppc_elf_link_hash_entry *) h;
5990 if (eh->elf.got.refcount > 0
5991 || (ELIMINATE_COPY_RELOCS
5992 && !eh->elf.def_regular
5993 && eh->elf.protected_def
5994 && eh->has_addr16_ha
5995 && eh->has_addr16_lo
5996 && htab->params->pic_fixup > 0))
5997 {
5998 unsigned int need;
5999
6000 /* Make sure this symbol is output as a dynamic symbol. */
6001 if (!ensure_undef_dynamic (info, &eh->elf))
6002 return FALSE;
6003
6004 need = 0;
6005 if ((eh->tls_mask & TLS_TLS) != 0)
6006 {
6007 if ((eh->tls_mask & TLS_LD) != 0)
6008 {
6009 if (!eh->elf.def_dynamic)
6010 /* We'll just use htab->tlsld_got.offset. This should
6011 always be the case. It's a little odd if we have
6012 a local dynamic reloc against a non-local symbol. */
6013 htab->tlsld_got.refcount += 1;
6014 else
6015 need += 8;
6016 }
6017 if ((eh->tls_mask & TLS_GD) != 0)
6018 need += 8;
6019 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
6020 need += 4;
6021 if ((eh->tls_mask & TLS_DTPREL) != 0)
6022 need += 4;
6023 }
6024 else
6025 need += 4;
6026 if (need == 0)
6027 eh->elf.got.offset = (bfd_vma) -1;
6028 else
6029 {
6030 eh->elf.got.offset = allocate_got (htab, need);
6031 if ((bfd_link_pic (info)
6032 || (htab->elf.dynamic_sections_created
6033 && eh->elf.dynindx != -1
6034 && !SYMBOL_REFERENCES_LOCAL (info, &eh->elf)))
6035 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &eh->elf))
6036 {
6037 asection *rsec = htab->elf.srelgot;
6038
6039 if (eh->elf.type == STT_GNU_IFUNC)
6040 rsec = htab->elf.irelplt;
6041 /* All the entries we allocated need relocs.
6042 Except LD only needs one. */
6043 if ((eh->tls_mask & TLS_LD) != 0
6044 && eh->elf.def_dynamic)
6045 need -= 4;
6046 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
6047 }
6048 }
6049 }
6050 else
6051 eh->elf.got.offset = (bfd_vma) -1;
6052
6053 /* If no dynamic sections we can't have dynamic relocs, except for
6054 IFUNCs which are handled even in static executables. */
6055 if (!htab->elf.dynamic_sections_created
6056 && h->type != STT_GNU_IFUNC)
6057 eh->dyn_relocs = NULL;
6058
6059 if (eh->dyn_relocs == NULL)
6060 ;
6061
6062 /* In the shared -Bsymbolic case, discard space allocated for
6063 dynamic pc-relative relocs against symbols which turn out to be
6064 defined in regular objects. For the normal shared case, discard
6065 space for relocs that have become local due to symbol visibility
6066 changes. */
6067 else if (bfd_link_pic (info))
6068 {
6069 /* Discard relocs on undefined symbols that must be local. */
6070 if (h->root.type == bfd_link_hash_undefined
6071 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6072 eh->dyn_relocs = NULL;
6073
6074 /* Also discard relocs on undefined weak syms with non-default
6075 visibility, or when dynamic_undefined_weak says so. */
6076 else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
6077 eh->dyn_relocs = NULL;
6078
6079 /* Relocs that use pc_count are those that appear on a call insn,
6080 or certain REL relocs (see must_be_dyn_reloc) that can be
6081 generated via assembly. We want calls to protected symbols to
6082 resolve directly to the function rather than going via the plt.
6083 If people want function pointer comparisons to work as expected
6084 then they should avoid writing weird assembly. */
6085 else if (SYMBOL_CALLS_LOCAL (info, h))
6086 {
6087 struct elf_dyn_relocs **pp;
6088
6089 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6090 {
6091 p->count -= p->pc_count;
6092 p->pc_count = 0;
6093 if (p->count == 0)
6094 *pp = p->next;
6095 else
6096 pp = &p->next;
6097 }
6098 }
6099
6100 if (htab->is_vxworks)
6101 {
6102 struct elf_dyn_relocs **pp;
6103
6104 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6105 {
6106 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6107 *pp = p->next;
6108 else
6109 pp = &p->next;
6110 }
6111 }
6112
6113 if (eh->dyn_relocs != NULL)
6114 {
6115 /* Make sure this symbol is output as a dynamic symbol. */
6116 if (!ensure_undef_dynamic (info, h))
6117 return FALSE;
6118 }
6119 }
6120 else if (ELIMINATE_COPY_RELOCS)
6121 {
6122 /* For the non-pic case, discard space for relocs against
6123 symbols which turn out to need copy relocs or are not
6124 dynamic. */
6125 if (!h->non_got_ref
6126 && !h->def_regular
6127 && !(h->protected_def
6128 && eh->has_addr16_ha
6129 && eh->has_addr16_lo
6130 && htab->params->pic_fixup > 0))
6131 {
6132 /* Make sure this symbol is output as a dynamic symbol. */
6133 if (!ensure_undef_dynamic (info, h))
6134 return FALSE;
6135
6136 if (h->dynindx == -1)
6137 eh->dyn_relocs = NULL;
6138 }
6139 else
6140 eh->dyn_relocs = NULL;
6141 }
6142
6143 /* Allocate space. */
6144 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6145 {
6146 asection *sreloc = elf_section_data (p->sec)->sreloc;
6147 if (eh->elf.type == STT_GNU_IFUNC)
6148 sreloc = htab->elf.irelplt;
6149 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6150 }
6151
6152 /* Handle PLT relocs. Done last, after dynindx has settled. */
6153 dyn = htab->elf.dynamic_sections_created && h->dynindx != -1;
6154 if (dyn || h->type == STT_GNU_IFUNC)
6155 {
6156 struct plt_entry *ent;
6157 bfd_boolean doneone = FALSE;
6158 bfd_vma plt_offset = 0, glink_offset = 0;
6159
6160 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6161 if (ent->plt.refcount > 0)
6162 {
6163 asection *s = htab->elf.splt;
6164
6165 if (!dyn)
6166 s = htab->elf.iplt;
6167
6168 if (htab->plt_type == PLT_NEW || !dyn)
6169 {
6170 if (!doneone)
6171 {
6172 plt_offset = s->size;
6173 s->size += 4;
6174 }
6175 ent->plt.offset = plt_offset;
6176
6177 s = htab->glink;
6178 if (!doneone || bfd_link_pic (info))
6179 {
6180 glink_offset = s->size;
6181 s->size += GLINK_ENTRY_SIZE;
6182 if (h == htab->tls_get_addr
6183 && !htab->params->no_tls_get_addr_opt)
6184 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
6185 }
6186 if (!doneone
6187 && !bfd_link_pic (info)
6188 && h->def_dynamic
6189 && !h->def_regular)
6190 {
6191 h->root.u.def.section = s;
6192 h->root.u.def.value = glink_offset;
6193 }
6194 ent->glink_offset = glink_offset;
6195
6196 if (htab->params->emit_stub_syms
6197 && !add_stub_sym (ent, h, info))
6198 return FALSE;
6199 }
6200 else
6201 {
6202 if (!doneone)
6203 {
6204 /* If this is the first .plt entry, make room
6205 for the special first entry. */
6206 if (s->size == 0)
6207 s->size += htab->plt_initial_entry_size;
6208
6209 /* The PowerPC PLT is actually composed of two
6210 parts, the first part is 2 words (for a load
6211 and a jump), and then there is a remaining
6212 word available at the end. */
6213 plt_offset = (htab->plt_initial_entry_size
6214 + (htab->plt_slot_size
6215 * ((s->size
6216 - htab->plt_initial_entry_size)
6217 / htab->plt_entry_size)));
6218
6219 /* If this symbol is not defined in a regular
6220 file, and we are not generating a shared
6221 library, then set the symbol to this location
6222 in the .plt. This is to avoid text
6223 relocations, and is required to make
6224 function pointers compare as equal between
6225 the normal executable and the shared library. */
6226 if (! bfd_link_pic (info)
6227 && h->def_dynamic
6228 && !h->def_regular)
6229 {
6230 h->root.u.def.section = s;
6231 h->root.u.def.value = plt_offset;
6232 }
6233
6234 /* Make room for this entry. */
6235 s->size += htab->plt_entry_size;
6236 /* After the 8192nd entry, room for two entries
6237 is allocated. */
6238 if (htab->plt_type == PLT_OLD
6239 && (s->size - htab->plt_initial_entry_size)
6240 / htab->plt_entry_size
6241 > PLT_NUM_SINGLE_ENTRIES)
6242 s->size += htab->plt_entry_size;
6243 }
6244 ent->plt.offset = plt_offset;
6245 }
6246
6247 /* We also need to make an entry in the .rela.plt section. */
6248 if (!doneone)
6249 {
6250 if (!dyn)
6251 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6252 else
6253 {
6254 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
6255
6256 if (htab->plt_type == PLT_VXWORKS)
6257 {
6258 /* Allocate space for the unloaded relocations. */
6259 if (!bfd_link_pic (info)
6260 && htab->elf.dynamic_sections_created)
6261 {
6262 if (ent->plt.offset
6263 == (bfd_vma) htab->plt_initial_entry_size)
6264 {
6265 htab->srelplt2->size
6266 += (sizeof (Elf32_External_Rela)
6267 * VXWORKS_PLTRESOLVE_RELOCS);
6268 }
6269
6270 htab->srelplt2->size
6271 += (sizeof (Elf32_External_Rela)
6272 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
6273 }
6274
6275 /* Every PLT entry has an associated GOT entry in
6276 .got.plt. */
6277 htab->elf.sgotplt->size += 4;
6278 }
6279 }
6280 doneone = TRUE;
6281 }
6282 }
6283 else
6284 ent->plt.offset = (bfd_vma) -1;
6285
6286 if (!doneone)
6287 {
6288 h->plt.plist = NULL;
6289 h->needs_plt = 0;
6290 }
6291 }
6292 else
6293 {
6294 h->plt.plist = NULL;
6295 h->needs_plt = 0;
6296 }
6297
6298 return TRUE;
6299 }
6300
6301 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6302 read-only sections. */
6303
6304 static bfd_boolean
6305 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6306 {
6307 if (h->root.type == bfd_link_hash_indirect)
6308 return TRUE;
6309
6310 if (readonly_dynrelocs (h))
6311 {
6312 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6313
6314 /* Not an error, just cut short the traversal. */
6315 return FALSE;
6316 }
6317 return TRUE;
6318 }
6319
6320 static const unsigned char glink_eh_frame_cie[] =
6321 {
6322 0, 0, 0, 16, /* length. */
6323 0, 0, 0, 0, /* id. */
6324 1, /* CIE version. */
6325 'z', 'R', 0, /* Augmentation string. */
6326 4, /* Code alignment. */
6327 0x7c, /* Data alignment. */
6328 65, /* RA reg. */
6329 1, /* Augmentation size. */
6330 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6331 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6332 };
6333
6334 /* Set the sizes of the dynamic sections. */
6335
6336 static bfd_boolean
6337 ppc_elf_size_dynamic_sections (bfd *output_bfd,
6338 struct bfd_link_info *info)
6339 {
6340 struct ppc_elf_link_hash_table *htab;
6341 asection *s;
6342 bfd_boolean relocs;
6343 bfd *ibfd;
6344
6345 #ifdef DEBUG
6346 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6347 #endif
6348
6349 htab = ppc_elf_hash_table (info);
6350 BFD_ASSERT (htab->elf.dynobj != NULL);
6351
6352 if (elf_hash_table (info)->dynamic_sections_created)
6353 {
6354 /* Set the contents of the .interp section to the interpreter. */
6355 if (bfd_link_executable (info) && !info->nointerp)
6356 {
6357 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6358 BFD_ASSERT (s != NULL);
6359 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6360 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6361 }
6362 }
6363
6364 if (htab->plt_type == PLT_OLD)
6365 htab->got_header_size = 16;
6366 else if (htab->plt_type == PLT_NEW)
6367 htab->got_header_size = 12;
6368
6369 /* Set up .got offsets for local syms, and space for local dynamic
6370 relocs. */
6371 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6372 {
6373 bfd_signed_vma *local_got;
6374 bfd_signed_vma *end_local_got;
6375 struct plt_entry **local_plt;
6376 struct plt_entry **end_local_plt;
6377 char *lgot_masks;
6378 bfd_size_type locsymcount;
6379 Elf_Internal_Shdr *symtab_hdr;
6380
6381 if (!is_ppc_elf (ibfd))
6382 continue;
6383
6384 for (s = ibfd->sections; s != NULL; s = s->next)
6385 {
6386 struct ppc_dyn_relocs *p;
6387
6388 for (p = ((struct ppc_dyn_relocs *)
6389 elf_section_data (s)->local_dynrel);
6390 p != NULL;
6391 p = p->next)
6392 {
6393 if (!bfd_is_abs_section (p->sec)
6394 && bfd_is_abs_section (p->sec->output_section))
6395 {
6396 /* Input section has been discarded, either because
6397 it is a copy of a linkonce section or due to
6398 linker script /DISCARD/, so we'll be discarding
6399 the relocs too. */
6400 }
6401 else if (htab->is_vxworks
6402 && strcmp (p->sec->output_section->name,
6403 ".tls_vars") == 0)
6404 {
6405 /* Relocations in vxworks .tls_vars sections are
6406 handled specially by the loader. */
6407 }
6408 else if (p->count != 0)
6409 {
6410 asection *sreloc = elf_section_data (p->sec)->sreloc;
6411 if (p->ifunc)
6412 sreloc = htab->elf.irelplt;
6413 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6414 if ((p->sec->output_section->flags
6415 & (SEC_READONLY | SEC_ALLOC))
6416 == (SEC_READONLY | SEC_ALLOC))
6417 info->flags |= DF_TEXTREL;
6418 }
6419 }
6420 }
6421
6422 local_got = elf_local_got_refcounts (ibfd);
6423 if (!local_got)
6424 continue;
6425
6426 symtab_hdr = &elf_symtab_hdr (ibfd);
6427 locsymcount = symtab_hdr->sh_info;
6428 end_local_got = local_got + locsymcount;
6429 local_plt = (struct plt_entry **) end_local_got;
6430 end_local_plt = local_plt + locsymcount;
6431 lgot_masks = (char *) end_local_plt;
6432
6433 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6434 if (*local_got > 0)
6435 {
6436 unsigned int need = 0;
6437 if ((*lgot_masks & TLS_TLS) != 0)
6438 {
6439 if ((*lgot_masks & TLS_GD) != 0)
6440 need += 8;
6441 if ((*lgot_masks & TLS_LD) != 0)
6442 htab->tlsld_got.refcount += 1;
6443 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6444 need += 4;
6445 if ((*lgot_masks & TLS_DTPREL) != 0)
6446 need += 4;
6447 }
6448 else
6449 need += 4;
6450 if (need == 0)
6451 *local_got = (bfd_vma) -1;
6452 else
6453 {
6454 *local_got = allocate_got (htab, need);
6455 if (bfd_link_pic (info))
6456 {
6457 asection *srel = htab->elf.srelgot;
6458 if ((*lgot_masks & PLT_IFUNC) != 0)
6459 srel = htab->elf.irelplt;
6460 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6461 }
6462 }
6463 }
6464 else
6465 *local_got = (bfd_vma) -1;
6466
6467 if (htab->is_vxworks)
6468 continue;
6469
6470 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6471 for (; local_plt < end_local_plt; ++local_plt)
6472 {
6473 struct plt_entry *ent;
6474 bfd_boolean doneone = FALSE;
6475 bfd_vma plt_offset = 0, glink_offset = 0;
6476
6477 for (ent = *local_plt; ent != NULL; ent = ent->next)
6478 if (ent->plt.refcount > 0)
6479 {
6480 s = htab->elf.iplt;
6481
6482 if (!doneone)
6483 {
6484 plt_offset = s->size;
6485 s->size += 4;
6486 }
6487 ent->plt.offset = plt_offset;
6488
6489 s = htab->glink;
6490 if (!doneone || bfd_link_pic (info))
6491 {
6492 glink_offset = s->size;
6493 s->size += GLINK_ENTRY_SIZE;
6494 }
6495 ent->glink_offset = glink_offset;
6496
6497 if (!doneone)
6498 {
6499 htab->elf.irelplt->size += sizeof (Elf32_External_Rela);
6500 doneone = TRUE;
6501 }
6502 }
6503 else
6504 ent->plt.offset = (bfd_vma) -1;
6505 }
6506 }
6507
6508 /* Allocate space for global sym dynamic relocs. */
6509 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6510
6511 if (htab->tlsld_got.refcount > 0)
6512 {
6513 htab->tlsld_got.offset = allocate_got (htab, 8);
6514 if (bfd_link_pic (info))
6515 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
6516 }
6517 else
6518 htab->tlsld_got.offset = (bfd_vma) -1;
6519
6520 if (htab->elf.sgot != NULL && htab->plt_type != PLT_VXWORKS)
6521 {
6522 unsigned int g_o_t = 32768;
6523
6524 /* If we haven't allocated the header, do so now. When we get here,
6525 for old plt/got the got size will be 0 to 32764 (not allocated),
6526 or 32780 to 65536 (header allocated). For new plt/got, the
6527 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6528 if (htab->elf.sgot->size <= 32768)
6529 {
6530 g_o_t = htab->elf.sgot->size;
6531 if (htab->plt_type == PLT_OLD)
6532 g_o_t += 4;
6533 htab->elf.sgot->size += htab->got_header_size;
6534 }
6535
6536 htab->elf.hgot->root.u.def.value = g_o_t;
6537 }
6538 if (bfd_link_pic (info))
6539 {
6540 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6541
6542 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6543 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6544 }
6545 if (info->emitrelocations)
6546 {
6547 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6548
6549 if (sda != NULL && sda->ref_regular)
6550 sda->root.u.def.section->flags |= SEC_KEEP;
6551 sda = htab->sdata[1].sym;
6552 if (sda != NULL && sda->ref_regular)
6553 sda->root.u.def.section->flags |= SEC_KEEP;
6554 }
6555
6556 if (htab->glink != NULL
6557 && htab->glink->size != 0
6558 && htab->elf.dynamic_sections_created)
6559 {
6560 htab->glink_pltresolve = htab->glink->size;
6561 /* Space for the branch table. ??? We don't need entries for
6562 non-dynamic symbols in this table. This case can arise with
6563 static ifuncs or forced local ifuncs. */
6564 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6565 /* Pad out to align the start of PLTresolve. */
6566 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6567 ? 63 : 15);
6568 htab->glink->size += GLINK_PLTRESOLVE;
6569
6570 if (htab->params->emit_stub_syms)
6571 {
6572 struct elf_link_hash_entry *sh;
6573 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6574 TRUE, FALSE, FALSE);
6575 if (sh == NULL)
6576 return FALSE;
6577 if (sh->root.type == bfd_link_hash_new)
6578 {
6579 sh->root.type = bfd_link_hash_defined;
6580 sh->root.u.def.section = htab->glink;
6581 sh->root.u.def.value = htab->glink_pltresolve;
6582 sh->ref_regular = 1;
6583 sh->def_regular = 1;
6584 sh->ref_regular_nonweak = 1;
6585 sh->forced_local = 1;
6586 sh->non_elf = 0;
6587 sh->root.linker_def = 1;
6588 }
6589 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6590 TRUE, FALSE, FALSE);
6591 if (sh == NULL)
6592 return FALSE;
6593 if (sh->root.type == bfd_link_hash_new)
6594 {
6595 sh->root.type = bfd_link_hash_defined;
6596 sh->root.u.def.section = htab->glink;
6597 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6598 sh->ref_regular = 1;
6599 sh->def_regular = 1;
6600 sh->ref_regular_nonweak = 1;
6601 sh->forced_local = 1;
6602 sh->non_elf = 0;
6603 sh->root.linker_def = 1;
6604 }
6605 }
6606 }
6607
6608 if (htab->glink != NULL
6609 && htab->glink->size != 0
6610 && htab->glink_eh_frame != NULL
6611 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6612 && _bfd_elf_eh_frame_present (info))
6613 {
6614 s = htab->glink_eh_frame;
6615 s->size = sizeof (glink_eh_frame_cie) + 20;
6616 if (bfd_link_pic (info))
6617 {
6618 s->size += 4;
6619 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6620 s->size += 4;
6621 }
6622 }
6623
6624 /* We've now determined the sizes of the various dynamic sections.
6625 Allocate memory for them. */
6626 relocs = FALSE;
6627 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6628 {
6629 bfd_boolean strip_section = TRUE;
6630
6631 if ((s->flags & SEC_LINKER_CREATED) == 0)
6632 continue;
6633
6634 if (s == htab->elf.splt
6635 || s == htab->elf.sgot)
6636 {
6637 /* We'd like to strip these sections if they aren't needed, but if
6638 we've exported dynamic symbols from them we must leave them.
6639 It's too late to tell BFD to get rid of the symbols. */
6640 if (htab->elf.hplt != NULL)
6641 strip_section = FALSE;
6642 /* Strip this section if we don't need it; see the
6643 comment below. */
6644 }
6645 else if (s == htab->elf.iplt
6646 || s == htab->glink
6647 || s == htab->glink_eh_frame
6648 || s == htab->elf.sgotplt
6649 || s == htab->sbss
6650 || s == htab->elf.sdynbss
6651 || s == htab->elf.sdynrelro
6652 || s == htab->dynsbss)
6653 {
6654 /* Strip these too. */
6655 }
6656 else if (s == htab->sdata[0].section
6657 || s == htab->sdata[1].section)
6658 {
6659 strip_section = (s->flags & SEC_KEEP) == 0;
6660 }
6661 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6662 ".rela"))
6663 {
6664 if (s->size != 0)
6665 {
6666 /* Remember whether there are any relocation sections. */
6667 relocs = TRUE;
6668
6669 /* We use the reloc_count field as a counter if we need
6670 to copy relocs into the output file. */
6671 s->reloc_count = 0;
6672 }
6673 }
6674 else
6675 {
6676 /* It's not one of our sections, so don't allocate space. */
6677 continue;
6678 }
6679
6680 if (s->size == 0 && strip_section)
6681 {
6682 /* If we don't need this section, strip it from the
6683 output file. This is mostly to handle .rela.bss and
6684 .rela.plt. We must create both sections in
6685 create_dynamic_sections, because they must be created
6686 before the linker maps input sections to output
6687 sections. The linker does that before
6688 adjust_dynamic_symbol is called, and it is that
6689 function which decides whether anything needs to go
6690 into these sections. */
6691 s->flags |= SEC_EXCLUDE;
6692 continue;
6693 }
6694
6695 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6696 continue;
6697
6698 /* Allocate memory for the section contents. */
6699 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6700 if (s->contents == NULL)
6701 return FALSE;
6702 }
6703
6704 if (htab->elf.dynamic_sections_created)
6705 {
6706 /* Add some entries to the .dynamic section. We fill in the
6707 values later, in ppc_elf_finish_dynamic_sections, but we
6708 must add the entries now so that we get the correct size for
6709 the .dynamic section. The DT_DEBUG entry is filled in by the
6710 dynamic linker and used by the debugger. */
6711 #define add_dynamic_entry(TAG, VAL) \
6712 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6713
6714 if (bfd_link_executable (info))
6715 {
6716 if (!add_dynamic_entry (DT_DEBUG, 0))
6717 return FALSE;
6718 }
6719
6720 if (htab->elf.splt != NULL && htab->elf.splt->size != 0)
6721 {
6722 if (!add_dynamic_entry (DT_PLTGOT, 0)
6723 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6724 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6725 || !add_dynamic_entry (DT_JMPREL, 0))
6726 return FALSE;
6727 }
6728
6729 if (htab->plt_type == PLT_NEW
6730 && htab->glink != NULL
6731 && htab->glink->size != 0)
6732 {
6733 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6734 return FALSE;
6735 if (!htab->params->no_tls_get_addr_opt
6736 && htab->tls_get_addr != NULL
6737 && htab->tls_get_addr->plt.plist != NULL
6738 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6739 return FALSE;
6740 }
6741
6742 if (relocs)
6743 {
6744 if (!add_dynamic_entry (DT_RELA, 0)
6745 || !add_dynamic_entry (DT_RELASZ, 0)
6746 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6747 return FALSE;
6748 }
6749
6750 /* If any dynamic relocs apply to a read-only section, then we
6751 need a DT_TEXTREL entry. */
6752 if ((info->flags & DF_TEXTREL) == 0)
6753 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6754 info);
6755
6756 if ((info->flags & DF_TEXTREL) != 0)
6757 {
6758 if (!add_dynamic_entry (DT_TEXTREL, 0))
6759 return FALSE;
6760 }
6761 if (htab->is_vxworks
6762 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6763 return FALSE;
6764 }
6765 #undef add_dynamic_entry
6766
6767 if (htab->glink_eh_frame != NULL
6768 && htab->glink_eh_frame->contents != NULL)
6769 {
6770 unsigned char *p = htab->glink_eh_frame->contents;
6771 bfd_vma val;
6772
6773 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6774 /* CIE length (rewrite in case little-endian). */
6775 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6776 p += sizeof (glink_eh_frame_cie);
6777 /* FDE length. */
6778 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6779 bfd_put_32 (htab->elf.dynobj, val, p);
6780 p += 4;
6781 /* CIE pointer. */
6782 val = p - htab->glink_eh_frame->contents;
6783 bfd_put_32 (htab->elf.dynobj, val, p);
6784 p += 4;
6785 /* Offset to .glink. Set later. */
6786 p += 4;
6787 /* .glink size. */
6788 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6789 p += 4;
6790 /* Augmentation. */
6791 p += 1;
6792
6793 if (bfd_link_pic (info)
6794 && htab->elf.dynamic_sections_created)
6795 {
6796 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6797 if (adv < 64)
6798 *p++ = DW_CFA_advance_loc + adv;
6799 else if (adv < 256)
6800 {
6801 *p++ = DW_CFA_advance_loc1;
6802 *p++ = adv;
6803 }
6804 else if (adv < 65536)
6805 {
6806 *p++ = DW_CFA_advance_loc2;
6807 bfd_put_16 (htab->elf.dynobj, adv, p);
6808 p += 2;
6809 }
6810 else
6811 {
6812 *p++ = DW_CFA_advance_loc4;
6813 bfd_put_32 (htab->elf.dynobj, adv, p);
6814 p += 4;
6815 }
6816 *p++ = DW_CFA_register;
6817 *p++ = 65;
6818 p++;
6819 *p++ = DW_CFA_advance_loc + 4;
6820 *p++ = DW_CFA_restore_extended;
6821 *p++ = 65;
6822 }
6823 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6824 == htab->glink_eh_frame->size);
6825 }
6826
6827 return TRUE;
6828 }
6829
6830 /* Arrange to have _SDA_BASE_ or _SDA2_BASE_ stripped from the output
6831 if it looks like nothing is using them. */
6832
6833 static void
6834 maybe_strip_sdasym (bfd *output_bfd, elf_linker_section_t *lsect)
6835 {
6836 struct elf_link_hash_entry *sda = lsect->sym;
6837
6838 if (sda != NULL && !sda->ref_regular && sda->dynindx == -1)
6839 {
6840 asection *s;
6841
6842 s = bfd_get_section_by_name (output_bfd, lsect->name);
6843 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6844 {
6845 s = bfd_get_section_by_name (output_bfd, lsect->bss_name);
6846 if (s == NULL || bfd_section_removed_from_list (output_bfd, s))
6847 {
6848 sda->def_regular = 0;
6849 /* This is somewhat magic. See elf_link_output_extsym. */
6850 sda->ref_dynamic = 1;
6851 sda->forced_local = 0;
6852 }
6853 }
6854 }
6855 }
6856
6857 void
6858 ppc_elf_maybe_strip_sdata_syms (struct bfd_link_info *info)
6859 {
6860 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
6861
6862 if (htab != NULL)
6863 {
6864 maybe_strip_sdasym (info->output_bfd, &htab->sdata[0]);
6865 maybe_strip_sdasym (info->output_bfd, &htab->sdata[1]);
6866 }
6867 }
6868
6869
6870 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6871
6872 static bfd_boolean
6873 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6874 {
6875 if (h->plt.plist != NULL
6876 && !h->def_regular
6877 && (!h->pointer_equality_needed
6878 || !h->ref_regular_nonweak))
6879 return FALSE;
6880
6881 return _bfd_elf_hash_symbol (h);
6882 }
6883 \f
6884 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6885
6886 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6887 used for some functions that are allowed to break the ABI). */
6888 static const int shared_stub_entry[] =
6889 {
6890 0x7c0802a6, /* mflr 0 */
6891 0x429f0005, /* bcl 20, 31, .Lxxx */
6892 0x7d8802a6, /* mflr 12 */
6893 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6894 0x398c0000, /* addi 12, 12, (xxx-.Lxxx)@l */
6895 0x7c0803a6, /* mtlr 0 */
6896 0x7d8903a6, /* mtctr 12 */
6897 0x4e800420, /* bctr */
6898 };
6899
6900 static const int stub_entry[] =
6901 {
6902 0x3d800000, /* lis 12,xxx@ha */
6903 0x398c0000, /* addi 12,12,xxx@l */
6904 0x7d8903a6, /* mtctr 12 */
6905 0x4e800420, /* bctr */
6906 };
6907
6908 struct ppc_elf_relax_info
6909 {
6910 unsigned int workaround_size;
6911 unsigned int picfixup_size;
6912 };
6913
6914 /* This function implements long branch trampolines, and the ppc476
6915 icache bug workaround. Any section needing trampolines or patch
6916 space for the workaround has its size extended so that we can
6917 add trampolines at the end of the section. */
6918
6919 static bfd_boolean
6920 ppc_elf_relax_section (bfd *abfd,
6921 asection *isec,
6922 struct bfd_link_info *link_info,
6923 bfd_boolean *again)
6924 {
6925 struct one_branch_fixup
6926 {
6927 struct one_branch_fixup *next;
6928 asection *tsec;
6929 /* Final link, can use the symbol offset. For a
6930 relocatable link we use the symbol's index. */
6931 bfd_vma toff;
6932 bfd_vma trampoff;
6933 };
6934
6935 Elf_Internal_Shdr *symtab_hdr;
6936 bfd_byte *contents = NULL;
6937 Elf_Internal_Sym *isymbuf = NULL;
6938 Elf_Internal_Rela *internal_relocs = NULL;
6939 Elf_Internal_Rela *irel, *irelend = NULL;
6940 struct one_branch_fixup *branch_fixups = NULL;
6941 struct ppc_elf_relax_info *relax_info = NULL;
6942 unsigned changes = 0;
6943 bfd_boolean workaround_change;
6944 struct ppc_elf_link_hash_table *htab;
6945 bfd_size_type trampbase, trampoff, newsize, picfixup_size;
6946 asection *got2;
6947 bfd_boolean maybe_pasted;
6948
6949 *again = FALSE;
6950
6951 /* No need to do anything with non-alloc or non-code sections. */
6952 if ((isec->flags & SEC_ALLOC) == 0
6953 || (isec->flags & SEC_CODE) == 0
6954 || (isec->flags & SEC_LINKER_CREATED) != 0
6955 || isec->size < 4)
6956 return TRUE;
6957
6958 /* We cannot represent the required PIC relocs in the output, so don't
6959 do anything. The linker doesn't support mixing -shared and -r
6960 anyway. */
6961 if (bfd_link_relocatable (link_info) && bfd_link_pic (link_info))
6962 return TRUE;
6963
6964 htab = ppc_elf_hash_table (link_info);
6965 if (htab == NULL)
6966 return TRUE;
6967
6968 isec->size = (isec->size + 3) & -4;
6969 if (isec->rawsize == 0)
6970 isec->rawsize = isec->size;
6971 trampbase = isec->size;
6972
6973 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE
6974 || isec->sec_info_type == SEC_INFO_TYPE_TARGET);
6975 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6976
6977 if (htab->params->ppc476_workaround
6978 || htab->params->pic_fixup > 0)
6979 {
6980 if (elf_section_data (isec)->sec_info == NULL)
6981 {
6982 elf_section_data (isec)->sec_info
6983 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6984 if (elf_section_data (isec)->sec_info == NULL)
6985 return FALSE;
6986 }
6987 relax_info = elf_section_data (isec)->sec_info;
6988 trampbase -= relax_info->workaround_size;
6989 }
6990
6991 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6992 || strcmp (isec->output_section->name, ".fini") == 0);
6993 /* Space for a branch around any trampolines. */
6994 trampoff = trampbase;
6995 if (maybe_pasted && trampbase == isec->rawsize)
6996 trampoff += 4;
6997
6998 symtab_hdr = &elf_symtab_hdr (abfd);
6999 picfixup_size = 0;
7000 if (htab->params->branch_trampolines
7001 || htab->params->pic_fixup > 0)
7002 {
7003 /* Get a copy of the native relocations. */
7004 if (isec->reloc_count != 0)
7005 {
7006 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
7007 link_info->keep_memory);
7008 if (internal_relocs == NULL)
7009 goto error_return;
7010 }
7011
7012 got2 = bfd_get_section_by_name (abfd, ".got2");
7013
7014 irelend = internal_relocs + isec->reloc_count;
7015 for (irel = internal_relocs; irel < irelend; irel++)
7016 {
7017 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
7018 bfd_vma toff, roff;
7019 asection *tsec;
7020 struct one_branch_fixup *f;
7021 size_t insn_offset = 0;
7022 bfd_vma max_branch_offset = 0, val;
7023 bfd_byte *hit_addr;
7024 unsigned long t0;
7025 struct elf_link_hash_entry *h;
7026 struct plt_entry **plist;
7027 unsigned char sym_type;
7028
7029 switch (r_type)
7030 {
7031 case R_PPC_REL24:
7032 case R_PPC_LOCAL24PC:
7033 case R_PPC_PLTREL24:
7034 max_branch_offset = 1 << 25;
7035 break;
7036
7037 case R_PPC_REL14:
7038 case R_PPC_REL14_BRTAKEN:
7039 case R_PPC_REL14_BRNTAKEN:
7040 max_branch_offset = 1 << 15;
7041 break;
7042
7043 case R_PPC_ADDR16_HA:
7044 if (htab->params->pic_fixup > 0)
7045 break;
7046 continue;
7047
7048 default:
7049 continue;
7050 }
7051
7052 /* Get the value of the symbol referred to by the reloc. */
7053 h = NULL;
7054 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
7055 {
7056 /* A local symbol. */
7057 Elf_Internal_Sym *isym;
7058
7059 /* Read this BFD's local symbols. */
7060 if (isymbuf == NULL)
7061 {
7062 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
7063 if (isymbuf == NULL)
7064 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
7065 symtab_hdr->sh_info, 0,
7066 NULL, NULL, NULL);
7067 if (isymbuf == 0)
7068 goto error_return;
7069 }
7070 isym = isymbuf + ELF32_R_SYM (irel->r_info);
7071 if (isym->st_shndx == SHN_UNDEF)
7072 tsec = bfd_und_section_ptr;
7073 else if (isym->st_shndx == SHN_ABS)
7074 tsec = bfd_abs_section_ptr;
7075 else if (isym->st_shndx == SHN_COMMON)
7076 tsec = bfd_com_section_ptr;
7077 else
7078 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
7079
7080 toff = isym->st_value;
7081 sym_type = ELF_ST_TYPE (isym->st_info);
7082 }
7083 else
7084 {
7085 /* Global symbol handling. */
7086 unsigned long indx;
7087
7088 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
7089 h = elf_sym_hashes (abfd)[indx];
7090
7091 while (h->root.type == bfd_link_hash_indirect
7092 || h->root.type == bfd_link_hash_warning)
7093 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7094
7095 if (h->root.type == bfd_link_hash_defined
7096 || h->root.type == bfd_link_hash_defweak)
7097 {
7098 tsec = h->root.u.def.section;
7099 toff = h->root.u.def.value;
7100 }
7101 else if (h->root.type == bfd_link_hash_undefined
7102 || h->root.type == bfd_link_hash_undefweak)
7103 {
7104 tsec = bfd_und_section_ptr;
7105 toff = bfd_link_relocatable (link_info) ? indx : 0;
7106 }
7107 else
7108 continue;
7109
7110 /* If this branch is to __tls_get_addr then we may later
7111 optimise away the call. We won't be needing a long-
7112 branch stub in that case. */
7113 if (bfd_link_executable (link_info)
7114 && h == htab->tls_get_addr
7115 && irel != internal_relocs)
7116 {
7117 unsigned long t_symndx = ELF32_R_SYM (irel[-1].r_info);
7118 unsigned long t_rtype = ELF32_R_TYPE (irel[-1].r_info);
7119 unsigned int tls_mask = 0;
7120
7121 /* The previous reloc should be one of R_PPC_TLSGD or
7122 R_PPC_TLSLD, or for older object files, a reloc
7123 on the __tls_get_addr arg setup insn. Get tls
7124 mask bits from the symbol on that reloc. */
7125 if (t_symndx < symtab_hdr->sh_info)
7126 {
7127 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7128
7129 if (local_got_offsets != NULL)
7130 {
7131 struct plt_entry **local_plt = (struct plt_entry **)
7132 (local_got_offsets + symtab_hdr->sh_info);
7133 char *lgot_masks = (char *)
7134 (local_plt + symtab_hdr->sh_info);
7135 tls_mask = lgot_masks[t_symndx];
7136 }
7137 }
7138 else
7139 {
7140 struct elf_link_hash_entry *th
7141 = elf_sym_hashes (abfd)[t_symndx - symtab_hdr->sh_info];
7142
7143 while (th->root.type == bfd_link_hash_indirect
7144 || th->root.type == bfd_link_hash_warning)
7145 th = (struct elf_link_hash_entry *) th->root.u.i.link;
7146
7147 tls_mask
7148 = ((struct ppc_elf_link_hash_entry *) th)->tls_mask;
7149 }
7150
7151 /* The mask bits tell us if the call will be
7152 optimised away. */
7153 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0
7154 && (t_rtype == R_PPC_TLSGD
7155 || t_rtype == R_PPC_GOT_TLSGD16
7156 || t_rtype == R_PPC_GOT_TLSGD16_LO))
7157 continue;
7158 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0
7159 && (t_rtype == R_PPC_TLSLD
7160 || t_rtype == R_PPC_GOT_TLSLD16
7161 || t_rtype == R_PPC_GOT_TLSLD16_LO))
7162 continue;
7163 }
7164
7165 sym_type = h->type;
7166 }
7167
7168 if (r_type == R_PPC_ADDR16_HA)
7169 {
7170 if (h != NULL
7171 && !h->def_regular
7172 && h->protected_def
7173 && ppc_elf_hash_entry (h)->has_addr16_ha
7174 && ppc_elf_hash_entry (h)->has_addr16_lo)
7175 picfixup_size += 12;
7176 continue;
7177 }
7178
7179 /* The condition here under which we call find_plt_ent must
7180 match that in relocate_section. If we call find_plt_ent here
7181 but not in relocate_section, or vice versa, then the branch
7182 destination used here may be incorrect. */
7183 plist = NULL;
7184 if (h != NULL)
7185 {
7186 /* We know is_branch_reloc (r_type) is true. */
7187 if (h->type == STT_GNU_IFUNC
7188 || r_type == R_PPC_PLTREL24)
7189 plist = &h->plt.plist;
7190 }
7191 else if (sym_type == STT_GNU_IFUNC
7192 && elf_local_got_offsets (abfd) != NULL)
7193 {
7194 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
7195 struct plt_entry **local_plt = (struct plt_entry **)
7196 (local_got_offsets + symtab_hdr->sh_info);
7197 plist = local_plt + ELF32_R_SYM (irel->r_info);
7198 }
7199 if (plist != NULL)
7200 {
7201 bfd_vma addend = 0;
7202 struct plt_entry *ent;
7203
7204 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (link_info))
7205 addend = irel->r_addend;
7206 ent = find_plt_ent (plist, got2, addend);
7207 if (ent != NULL)
7208 {
7209 if (htab->plt_type == PLT_NEW
7210 || h == NULL
7211 || !htab->elf.dynamic_sections_created
7212 || h->dynindx == -1)
7213 {
7214 tsec = htab->glink;
7215 toff = ent->glink_offset;
7216 }
7217 else
7218 {
7219 tsec = htab->elf.splt;
7220 toff = ent->plt.offset;
7221 }
7222 }
7223 }
7224
7225 /* If the branch and target are in the same section, you have
7226 no hope of adding stubs. We'll error out later should the
7227 branch overflow. */
7228 if (tsec == isec)
7229 continue;
7230
7231 /* There probably isn't any reason to handle symbols in
7232 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
7233 attribute for a code section, and we are only looking at
7234 branches. However, implement it correctly here as a
7235 reference for other target relax_section functions. */
7236 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
7237 {
7238 /* At this stage in linking, no SEC_MERGE symbol has been
7239 adjusted, so all references to such symbols need to be
7240 passed through _bfd_merged_section_offset. (Later, in
7241 relocate_section, all SEC_MERGE symbols *except* for
7242 section symbols have been adjusted.)
7243
7244 gas may reduce relocations against symbols in SEC_MERGE
7245 sections to a relocation against the section symbol when
7246 the original addend was zero. When the reloc is against
7247 a section symbol we should include the addend in the
7248 offset passed to _bfd_merged_section_offset, since the
7249 location of interest is the original symbol. On the
7250 other hand, an access to "sym+addend" where "sym" is not
7251 a section symbol should not include the addend; Such an
7252 access is presumed to be an offset from "sym"; The
7253 location of interest is just "sym". */
7254 if (sym_type == STT_SECTION)
7255 toff += irel->r_addend;
7256
7257 toff
7258 = _bfd_merged_section_offset (abfd, &tsec,
7259 elf_section_data (tsec)->sec_info,
7260 toff);
7261
7262 if (sym_type != STT_SECTION)
7263 toff += irel->r_addend;
7264 }
7265 /* PLTREL24 addends are special. */
7266 else if (r_type != R_PPC_PLTREL24)
7267 toff += irel->r_addend;
7268
7269 /* Attempted -shared link of non-pic code loses. */
7270 if ((!bfd_link_relocatable (link_info)
7271 && tsec == bfd_und_section_ptr)
7272 || tsec->output_section == NULL
7273 || (tsec->owner != NULL
7274 && (tsec->owner->flags & BFD_PLUGIN) != 0))
7275 continue;
7276
7277 roff = irel->r_offset;
7278
7279 /* If the branch is in range, no need to do anything. */
7280 if (tsec != bfd_und_section_ptr
7281 && (!bfd_link_relocatable (link_info)
7282 /* A relocatable link may have sections moved during
7283 final link, so do not presume they remain in range. */
7284 || tsec->output_section == isec->output_section))
7285 {
7286 bfd_vma symaddr, reladdr;
7287
7288 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
7289 reladdr = isec->output_section->vma + isec->output_offset + roff;
7290 if (symaddr - reladdr + max_branch_offset
7291 < 2 * max_branch_offset)
7292 continue;
7293 }
7294
7295 /* Look for an existing fixup to this address. */
7296 for (f = branch_fixups; f ; f = f->next)
7297 if (f->tsec == tsec && f->toff == toff)
7298 break;
7299
7300 if (f == NULL)
7301 {
7302 size_t size;
7303 unsigned long stub_rtype;
7304
7305 val = trampoff - roff;
7306 if (val >= max_branch_offset)
7307 /* Oh dear, we can't reach a trampoline. Don't try to add
7308 one. We'll report an error later. */
7309 continue;
7310
7311 if (bfd_link_pic (link_info))
7312 {
7313 size = 4 * ARRAY_SIZE (shared_stub_entry);
7314 insn_offset = 12;
7315 }
7316 else
7317 {
7318 size = 4 * ARRAY_SIZE (stub_entry);
7319 insn_offset = 0;
7320 }
7321 stub_rtype = R_PPC_RELAX;
7322 if (tsec == htab->elf.splt
7323 || tsec == htab->glink)
7324 {
7325 stub_rtype = R_PPC_RELAX_PLT;
7326 if (r_type == R_PPC_PLTREL24)
7327 stub_rtype = R_PPC_RELAX_PLTREL24;
7328 }
7329
7330 /* Hijack the old relocation. Since we need two
7331 relocations for this use a "composite" reloc. */
7332 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
7333 stub_rtype);
7334 irel->r_offset = trampoff + insn_offset;
7335 if (r_type == R_PPC_PLTREL24
7336 && stub_rtype != R_PPC_RELAX_PLTREL24)
7337 irel->r_addend = 0;
7338
7339 /* Record the fixup so we don't do it again this section. */
7340 f = bfd_malloc (sizeof (*f));
7341 f->next = branch_fixups;
7342 f->tsec = tsec;
7343 f->toff = toff;
7344 f->trampoff = trampoff;
7345 branch_fixups = f;
7346
7347 trampoff += size;
7348 changes++;
7349 }
7350 else
7351 {
7352 val = f->trampoff - roff;
7353 if (val >= max_branch_offset)
7354 continue;
7355
7356 /* Nop out the reloc, since we're finalizing things here. */
7357 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7358 }
7359
7360 /* Get the section contents. */
7361 if (contents == NULL)
7362 {
7363 /* Get cached copy if it exists. */
7364 if (elf_section_data (isec)->this_hdr.contents != NULL)
7365 contents = elf_section_data (isec)->this_hdr.contents;
7366 /* Go get them off disk. */
7367 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7368 goto error_return;
7369 }
7370
7371 /* Fix up the existing branch to hit the trampoline. */
7372 hit_addr = contents + roff;
7373 switch (r_type)
7374 {
7375 case R_PPC_REL24:
7376 case R_PPC_LOCAL24PC:
7377 case R_PPC_PLTREL24:
7378 t0 = bfd_get_32 (abfd, hit_addr);
7379 t0 &= ~0x3fffffc;
7380 t0 |= val & 0x3fffffc;
7381 bfd_put_32 (abfd, t0, hit_addr);
7382 break;
7383
7384 case R_PPC_REL14:
7385 case R_PPC_REL14_BRTAKEN:
7386 case R_PPC_REL14_BRNTAKEN:
7387 t0 = bfd_get_32 (abfd, hit_addr);
7388 t0 &= ~0xfffc;
7389 t0 |= val & 0xfffc;
7390 bfd_put_32 (abfd, t0, hit_addr);
7391 break;
7392 }
7393 }
7394
7395 while (branch_fixups != NULL)
7396 {
7397 struct one_branch_fixup *f = branch_fixups;
7398 branch_fixups = branch_fixups->next;
7399 free (f);
7400 }
7401 }
7402
7403 workaround_change = FALSE;
7404 newsize = trampoff;
7405 if (htab->params->ppc476_workaround
7406 && (!bfd_link_relocatable (link_info)
7407 || isec->output_section->alignment_power >= htab->params->pagesize_p2))
7408 {
7409 bfd_vma addr, end_addr;
7410 unsigned int crossings;
7411 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
7412
7413 addr = isec->output_section->vma + isec->output_offset;
7414 end_addr = addr + trampoff;
7415 addr &= -pagesize;
7416 crossings = ((end_addr & -pagesize) - addr) >> htab->params->pagesize_p2;
7417 if (crossings != 0)
7418 {
7419 /* Keep space aligned, to ensure the patch code itself does
7420 not cross a page. Don't decrease size calculated on a
7421 previous pass as otherwise we might never settle on a layout. */
7422 newsize = 15 - ((end_addr - 1) & 15);
7423 newsize += crossings * 16;
7424 if (relax_info->workaround_size < newsize)
7425 {
7426 relax_info->workaround_size = newsize;
7427 workaround_change = TRUE;
7428 }
7429 /* Ensure relocate_section is called. */
7430 isec->flags |= SEC_RELOC;
7431 }
7432 newsize = trampoff + relax_info->workaround_size;
7433 }
7434
7435 if (htab->params->pic_fixup > 0)
7436 {
7437 picfixup_size -= relax_info->picfixup_size;
7438 if (picfixup_size != 0)
7439 relax_info->picfixup_size += picfixup_size;
7440 newsize += relax_info->picfixup_size;
7441 }
7442
7443 if (changes != 0 || picfixup_size != 0 || workaround_change)
7444 isec->size = newsize;
7445
7446 if (isymbuf != NULL
7447 && symtab_hdr->contents != (unsigned char *) isymbuf)
7448 {
7449 if (! link_info->keep_memory)
7450 free (isymbuf);
7451 else
7452 {
7453 /* Cache the symbols for elf_link_input_bfd. */
7454 symtab_hdr->contents = (unsigned char *) isymbuf;
7455 }
7456 }
7457
7458 if (contents != NULL
7459 && elf_section_data (isec)->this_hdr.contents != contents)
7460 {
7461 if (!changes && !link_info->keep_memory)
7462 free (contents);
7463 else
7464 {
7465 /* Cache the section contents for elf_link_input_bfd. */
7466 elf_section_data (isec)->this_hdr.contents = contents;
7467 }
7468 }
7469
7470 changes += picfixup_size;
7471 if (changes != 0)
7472 {
7473 /* Append sufficient NOP relocs so we can write out relocation
7474 information for the trampolines. */
7475 Elf_Internal_Shdr *rel_hdr;
7476 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7477 * sizeof (*new_relocs));
7478 unsigned ix;
7479
7480 if (!new_relocs)
7481 goto error_return;
7482 memcpy (new_relocs, internal_relocs,
7483 isec->reloc_count * sizeof (*new_relocs));
7484 for (ix = changes; ix--;)
7485 {
7486 irel = new_relocs + ix + isec->reloc_count;
7487
7488 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7489 }
7490 if (internal_relocs != elf_section_data (isec)->relocs)
7491 free (internal_relocs);
7492 elf_section_data (isec)->relocs = new_relocs;
7493 isec->reloc_count += changes;
7494 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7495 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7496 }
7497 else if (internal_relocs != NULL
7498 && elf_section_data (isec)->relocs != internal_relocs)
7499 free (internal_relocs);
7500
7501 *again = changes != 0 || workaround_change;
7502 return TRUE;
7503
7504 error_return:
7505 while (branch_fixups != NULL)
7506 {
7507 struct one_branch_fixup *f = branch_fixups;
7508 branch_fixups = branch_fixups->next;
7509 free (f);
7510 }
7511 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7512 free (isymbuf);
7513 if (contents != NULL
7514 && elf_section_data (isec)->this_hdr.contents != contents)
7515 free (contents);
7516 if (internal_relocs != NULL
7517 && elf_section_data (isec)->relocs != internal_relocs)
7518 free (internal_relocs);
7519 return FALSE;
7520 }
7521 \f
7522 /* What to do when ld finds relocations against symbols defined in
7523 discarded sections. */
7524
7525 static unsigned int
7526 ppc_elf_action_discarded (asection *sec)
7527 {
7528 if (strcmp (".fixup", sec->name) == 0)
7529 return 0;
7530
7531 if (strcmp (".got2", sec->name) == 0)
7532 return 0;
7533
7534 return _bfd_elf_default_action_discarded (sec);
7535 }
7536 \f
7537 /* Fill in the address for a pointer generated in a linker section. */
7538
7539 static bfd_vma
7540 elf_finish_pointer_linker_section (bfd *input_bfd,
7541 elf_linker_section_t *lsect,
7542 struct elf_link_hash_entry *h,
7543 bfd_vma relocation,
7544 const Elf_Internal_Rela *rel)
7545 {
7546 elf_linker_section_pointers_t *linker_section_ptr;
7547
7548 BFD_ASSERT (lsect != NULL);
7549
7550 if (h != NULL)
7551 {
7552 /* Handle global symbol. */
7553 struct ppc_elf_link_hash_entry *eh;
7554
7555 eh = (struct ppc_elf_link_hash_entry *) h;
7556 BFD_ASSERT (eh->elf.def_regular);
7557 linker_section_ptr = eh->linker_section_pointer;
7558 }
7559 else
7560 {
7561 /* Handle local symbol. */
7562 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7563
7564 BFD_ASSERT (is_ppc_elf (input_bfd));
7565 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7566 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7567 }
7568
7569 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7570 rel->r_addend,
7571 lsect);
7572 BFD_ASSERT (linker_section_ptr != NULL);
7573
7574 /* Offset will always be a multiple of four, so use the bottom bit
7575 as a "written" flag. */
7576 if ((linker_section_ptr->offset & 1) == 0)
7577 {
7578 bfd_put_32 (lsect->section->owner,
7579 relocation + linker_section_ptr->addend,
7580 lsect->section->contents + linker_section_ptr->offset);
7581 linker_section_ptr->offset += 1;
7582 }
7583
7584 relocation = (lsect->section->output_section->vma
7585 + lsect->section->output_offset
7586 + linker_section_ptr->offset - 1
7587 - SYM_VAL (lsect->sym));
7588
7589 #ifdef DEBUG
7590 fprintf (stderr,
7591 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7592 lsect->name, (long) relocation, (long) relocation);
7593 #endif
7594
7595 return relocation;
7596 }
7597
7598 #define PPC_LO(v) ((v) & 0xffff)
7599 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7600 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7601
7602 static void
7603 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7604 struct bfd_link_info *info)
7605 {
7606 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7607 bfd *output_bfd = info->output_bfd;
7608 bfd_vma plt;
7609
7610 plt = ((ent->plt.offset & ~1)
7611 + plt_sec->output_section->vma
7612 + plt_sec->output_offset);
7613
7614 if (bfd_link_pic (info))
7615 {
7616 bfd_vma got = 0;
7617
7618 if (ent->addend >= 32768)
7619 got = (ent->addend
7620 + ent->sec->output_section->vma
7621 + ent->sec->output_offset);
7622 else if (htab->elf.hgot != NULL)
7623 got = SYM_VAL (htab->elf.hgot);
7624
7625 plt -= got;
7626
7627 if (plt + 0x8000 < 0x10000)
7628 {
7629 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7630 p += 4;
7631 bfd_put_32 (output_bfd, MTCTR_11, p);
7632 p += 4;
7633 bfd_put_32 (output_bfd, BCTR, p);
7634 p += 4;
7635 bfd_put_32 (output_bfd, htab->params->ppc476_workaround ? BA : NOP, p);
7636 p += 4;
7637 }
7638 else
7639 {
7640 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7641 p += 4;
7642 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7643 p += 4;
7644 bfd_put_32 (output_bfd, MTCTR_11, p);
7645 p += 4;
7646 bfd_put_32 (output_bfd, BCTR, p);
7647 p += 4;
7648 }
7649 }
7650 else
7651 {
7652 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7653 p += 4;
7654 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7655 p += 4;
7656 bfd_put_32 (output_bfd, MTCTR_11, p);
7657 p += 4;
7658 bfd_put_32 (output_bfd, BCTR, p);
7659 p += 4;
7660 }
7661 }
7662
7663 /* Return true if symbol is defined statically. */
7664
7665 static bfd_boolean
7666 is_static_defined (struct elf_link_hash_entry *h)
7667 {
7668 return ((h->root.type == bfd_link_hash_defined
7669 || h->root.type == bfd_link_hash_defweak)
7670 && h->root.u.def.section != NULL
7671 && h->root.u.def.section->output_section != NULL);
7672 }
7673
7674 /* If INSN is an opcode that may be used with an @tls operand, return
7675 the transformed insn for TLS optimisation, otherwise return 0. If
7676 REG is non-zero only match an insn with RB or RA equal to REG. */
7677
7678 unsigned int
7679 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7680 {
7681 unsigned int rtra;
7682
7683 if ((insn & (0x3f << 26)) != 31 << 26)
7684 return 0;
7685
7686 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7687 rtra = insn & ((1 << 26) - (1 << 16));
7688 else if (((insn >> 16) & 0x1f) == reg)
7689 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7690 else
7691 return 0;
7692
7693 if ((insn & (0x3ff << 1)) == 266 << 1)
7694 /* add -> addi. */
7695 insn = 14 << 26;
7696 else if ((insn & (0x1f << 1)) == 23 << 1
7697 && ((insn & (0x1f << 6)) < 14 << 6
7698 || ((insn & (0x1f << 6)) >= 16 << 6
7699 && (insn & (0x1f << 6)) < 24 << 6)))
7700 /* load and store indexed -> dform. */
7701 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7702 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7703 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7704 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7705 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7706 /* lwax -> lwa. */
7707 insn = (58 << 26) | 2;
7708 else
7709 return 0;
7710 insn |= rtra;
7711 return insn;
7712 }
7713
7714 /* If INSN is an opcode that may be used with an @tprel operand, return
7715 the transformed insn for an undefined weak symbol, ie. with the
7716 thread pointer REG operand removed. Otherwise return 0. */
7717
7718 unsigned int
7719 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7720 {
7721 if ((insn & (0x1f << 16)) == reg << 16
7722 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7723 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7724 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7725 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7726 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7727 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7728 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7729 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7730 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7731 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7732 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7733 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7734 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7735 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7736 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7737 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7738 && (insn & 3) != 1)
7739 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7740 && ((insn & 3) == 0 || (insn & 3) == 3))))
7741 {
7742 insn &= ~(0x1f << 16);
7743 }
7744 else if ((insn & (0x1f << 21)) == reg << 21
7745 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7746 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7747 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7748 {
7749 insn &= ~(0x1f << 21);
7750 insn |= (insn & (0x1f << 16)) << 5;
7751 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7752 insn -= 2 >> 26; /* convert to ori,oris */
7753 }
7754 else
7755 insn = 0;
7756 return insn;
7757 }
7758
7759 static bfd_boolean
7760 is_insn_ds_form (unsigned int insn)
7761 {
7762 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7763 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7764 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7765 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7766 }
7767
7768 static bfd_boolean
7769 is_insn_dq_form (unsigned int insn)
7770 {
7771 return ((insn & (0x3f << 26)) == 56u << 26 /* lq */
7772 || ((insn & (0x3f << 26)) == (61u << 26) /* lxv, stxv */
7773 && (insn & 3) == 1));
7774 }
7775
7776 /* The RELOCATE_SECTION function is called by the ELF backend linker
7777 to handle the relocations for a section.
7778
7779 The relocs are always passed as Rela structures; if the section
7780 actually uses Rel structures, the r_addend field will always be
7781 zero.
7782
7783 This function is responsible for adjust the section contents as
7784 necessary, and (if using Rela relocs and generating a
7785 relocatable output file) adjusting the reloc addend as
7786 necessary.
7787
7788 This function does not have to worry about setting the reloc
7789 address or the reloc symbol index.
7790
7791 LOCAL_SYMS is a pointer to the swapped in local symbols.
7792
7793 LOCAL_SECTIONS is an array giving the section in the input file
7794 corresponding to the st_shndx field of each local symbol.
7795
7796 The global hash table entry for the global symbols can be found
7797 via elf_sym_hashes (input_bfd).
7798
7799 When generating relocatable output, this function must handle
7800 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7801 going to be the section symbol corresponding to the output
7802 section, which means that the addend must be adjusted
7803 accordingly. */
7804
7805 static bfd_boolean
7806 ppc_elf_relocate_section (bfd *output_bfd,
7807 struct bfd_link_info *info,
7808 bfd *input_bfd,
7809 asection *input_section,
7810 bfd_byte *contents,
7811 Elf_Internal_Rela *relocs,
7812 Elf_Internal_Sym *local_syms,
7813 asection **local_sections)
7814 {
7815 Elf_Internal_Shdr *symtab_hdr;
7816 struct elf_link_hash_entry **sym_hashes;
7817 struct ppc_elf_link_hash_table *htab;
7818 Elf_Internal_Rela *rel;
7819 Elf_Internal_Rela *wrel;
7820 Elf_Internal_Rela *relend;
7821 Elf_Internal_Rela outrel;
7822 asection *got2;
7823 bfd_vma *local_got_offsets;
7824 bfd_boolean ret = TRUE;
7825 bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0);
7826 bfd_boolean is_vxworks_tls;
7827 unsigned int picfixup_size = 0;
7828 struct ppc_elf_relax_info *relax_info = NULL;
7829
7830 #ifdef DEBUG
7831 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7832 "%ld relocations%s",
7833 input_bfd, input_section,
7834 (long) input_section->reloc_count,
7835 (bfd_link_relocatable (info)) ? " (relocatable)" : "");
7836 #endif
7837
7838 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7839
7840 /* Initialize howto table if not already done. */
7841 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7842 ppc_elf_howto_init ();
7843
7844 htab = ppc_elf_hash_table (info);
7845 local_got_offsets = elf_local_got_offsets (input_bfd);
7846 symtab_hdr = &elf_symtab_hdr (input_bfd);
7847 sym_hashes = elf_sym_hashes (input_bfd);
7848 /* We have to handle relocations in vxworks .tls_vars sections
7849 specially, because the dynamic loader is 'weird'. */
7850 is_vxworks_tls = (htab->is_vxworks && bfd_link_pic (info)
7851 && !strcmp (input_section->output_section->name,
7852 ".tls_vars"));
7853 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
7854 relax_info = elf_section_data (input_section)->sec_info;
7855 rel = wrel = relocs;
7856 relend = relocs + input_section->reloc_count;
7857 for (; rel < relend; wrel++, rel++)
7858 {
7859 enum elf_ppc_reloc_type r_type;
7860 bfd_vma addend;
7861 bfd_reloc_status_type r;
7862 Elf_Internal_Sym *sym;
7863 asection *sec;
7864 struct elf_link_hash_entry *h;
7865 const char *sym_name;
7866 reloc_howto_type *howto;
7867 unsigned long r_symndx;
7868 bfd_vma relocation;
7869 bfd_vma branch_bit, from;
7870 bfd_boolean unresolved_reloc;
7871 bfd_boolean warned;
7872 unsigned int tls_type, tls_mask, tls_gd;
7873 struct plt_entry **ifunc;
7874 struct reloc_howto_struct alt_howto;
7875
7876 again:
7877 r_type = ELF32_R_TYPE (rel->r_info);
7878 sym = NULL;
7879 sec = NULL;
7880 h = NULL;
7881 unresolved_reloc = FALSE;
7882 warned = FALSE;
7883 r_symndx = ELF32_R_SYM (rel->r_info);
7884
7885 if (r_symndx < symtab_hdr->sh_info)
7886 {
7887 sym = local_syms + r_symndx;
7888 sec = local_sections[r_symndx];
7889 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7890
7891 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7892 }
7893 else
7894 {
7895 bfd_boolean ignored;
7896
7897 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7898 r_symndx, symtab_hdr, sym_hashes,
7899 h, sec, relocation,
7900 unresolved_reloc, warned, ignored);
7901
7902 sym_name = h->root.root.string;
7903 }
7904
7905 if (sec != NULL && discarded_section (sec))
7906 {
7907 /* For relocs against symbols from removed linkonce sections,
7908 or sections discarded by a linker script, we just want the
7909 section contents zeroed. Avoid any special processing. */
7910 howto = NULL;
7911 if (r_type < R_PPC_max)
7912 howto = ppc_elf_howto_table[r_type];
7913
7914 _bfd_clear_contents (howto, input_bfd, input_section,
7915 contents + rel->r_offset);
7916 wrel->r_offset = rel->r_offset;
7917 wrel->r_info = 0;
7918 wrel->r_addend = 0;
7919
7920 /* For ld -r, remove relocations in debug sections against
7921 sections defined in discarded sections. Not done for
7922 non-debug to preserve relocs in .eh_frame which the
7923 eh_frame editing code expects to be present. */
7924 if (bfd_link_relocatable (info)
7925 && (input_section->flags & SEC_DEBUGGING))
7926 wrel--;
7927
7928 continue;
7929 }
7930
7931 if (bfd_link_relocatable (info))
7932 {
7933 if (got2 != NULL
7934 && r_type == R_PPC_PLTREL24
7935 && rel->r_addend != 0)
7936 {
7937 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7938 addend specifies the GOT pointer offset within .got2. */
7939 rel->r_addend += got2->output_offset;
7940 }
7941 if (r_type != R_PPC_RELAX_PLT
7942 && r_type != R_PPC_RELAX_PLTREL24
7943 && r_type != R_PPC_RELAX)
7944 goto copy_reloc;
7945 }
7946
7947 /* TLS optimizations. Replace instruction sequences and relocs
7948 based on information we collected in tls_optimize. We edit
7949 RELOCS so that --emit-relocs will output something sensible
7950 for the final instruction stream. */
7951 tls_mask = 0;
7952 tls_gd = 0;
7953 if (h != NULL)
7954 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7955 else if (local_got_offsets != NULL)
7956 {
7957 struct plt_entry **local_plt;
7958 char *lgot_masks;
7959 local_plt
7960 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7961 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7962 tls_mask = lgot_masks[r_symndx];
7963 }
7964
7965 /* Ensure reloc mapping code below stays sane. */
7966 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7967 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7968 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7969 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7970 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7971 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7972 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7973 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7974 abort ();
7975 switch (r_type)
7976 {
7977 default:
7978 break;
7979
7980 case R_PPC_GOT_TPREL16:
7981 case R_PPC_GOT_TPREL16_LO:
7982 if ((tls_mask & TLS_TLS) != 0
7983 && (tls_mask & TLS_TPREL) == 0)
7984 {
7985 bfd_vma insn;
7986
7987 insn = bfd_get_32 (input_bfd,
7988 contents + rel->r_offset - d_offset);
7989 insn &= 31 << 21;
7990 insn |= 0x3c020000; /* addis 0,2,0 */
7991 bfd_put_32 (input_bfd, insn,
7992 contents + rel->r_offset - d_offset);
7993 r_type = R_PPC_TPREL16_HA;
7994 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7995 }
7996 break;
7997
7998 case R_PPC_TLS:
7999 if ((tls_mask & TLS_TLS) != 0
8000 && (tls_mask & TLS_TPREL) == 0)
8001 {
8002 bfd_vma insn;
8003
8004 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8005 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
8006 if (insn == 0)
8007 abort ();
8008 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8009 r_type = R_PPC_TPREL16_LO;
8010 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8011
8012 /* Was PPC_TLS which sits on insn boundary, now
8013 PPC_TPREL16_LO which is at low-order half-word. */
8014 rel->r_offset += d_offset;
8015 }
8016 break;
8017
8018 case R_PPC_GOT_TLSGD16_HI:
8019 case R_PPC_GOT_TLSGD16_HA:
8020 tls_gd = TLS_TPRELGD;
8021 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8022 goto tls_gdld_hi;
8023 break;
8024
8025 case R_PPC_GOT_TLSLD16_HI:
8026 case R_PPC_GOT_TLSLD16_HA:
8027 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8028 {
8029 tls_gdld_hi:
8030 if ((tls_mask & tls_gd) != 0)
8031 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8032 + R_PPC_GOT_TPREL16);
8033 else
8034 {
8035 rel->r_offset -= d_offset;
8036 bfd_put_32 (input_bfd, NOP, contents + rel->r_offset);
8037 r_type = R_PPC_NONE;
8038 }
8039 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8040 }
8041 break;
8042
8043 case R_PPC_GOT_TLSGD16:
8044 case R_PPC_GOT_TLSGD16_LO:
8045 tls_gd = TLS_TPRELGD;
8046 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8047 goto tls_ldgd_opt;
8048 break;
8049
8050 case R_PPC_GOT_TLSLD16:
8051 case R_PPC_GOT_TLSLD16_LO:
8052 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8053 {
8054 unsigned int insn1, insn2;
8055 bfd_vma offset;
8056
8057 tls_ldgd_opt:
8058 offset = (bfd_vma) -1;
8059 /* If not using the newer R_PPC_TLSGD/LD to mark
8060 __tls_get_addr calls, we must trust that the call
8061 stays with its arg setup insns, ie. that the next
8062 reloc is the __tls_get_addr call associated with
8063 the current reloc. Edit both insns. */
8064 if (input_section->has_tls_get_addr_call
8065 && rel + 1 < relend
8066 && branch_reloc_hash_match (input_bfd, rel + 1,
8067 htab->tls_get_addr))
8068 offset = rel[1].r_offset;
8069 /* We read the low GOT_TLS insn because we need to keep
8070 the destination reg. It may be something other than
8071 the usual r3, and moved to r3 before the call by
8072 intervening code. */
8073 insn1 = bfd_get_32 (input_bfd,
8074 contents + rel->r_offset - d_offset);
8075 if ((tls_mask & tls_gd) != 0)
8076 {
8077 /* IE */
8078 insn1 &= (0x1f << 21) | (0x1f << 16);
8079 insn1 |= 32 << 26; /* lwz */
8080 if (offset != (bfd_vma) -1)
8081 {
8082 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8083 insn2 = 0x7c631214; /* add 3,3,2 */
8084 bfd_put_32 (input_bfd, insn2, contents + offset);
8085 }
8086 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
8087 + R_PPC_GOT_TPREL16);
8088 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8089 }
8090 else
8091 {
8092 /* LE */
8093 insn1 &= 0x1f << 21;
8094 insn1 |= 0x3c020000; /* addis r,2,0 */
8095 if (tls_gd == 0)
8096 {
8097 /* Was an LD reloc. */
8098 for (r_symndx = 0;
8099 r_symndx < symtab_hdr->sh_info;
8100 r_symndx++)
8101 if (local_sections[r_symndx] == sec)
8102 break;
8103 if (r_symndx >= symtab_hdr->sh_info)
8104 r_symndx = STN_UNDEF;
8105 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8106 if (r_symndx != STN_UNDEF)
8107 rel->r_addend -= (local_syms[r_symndx].st_value
8108 + sec->output_offset
8109 + sec->output_section->vma);
8110 }
8111 r_type = R_PPC_TPREL16_HA;
8112 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8113 if (offset != (bfd_vma) -1)
8114 {
8115 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8116 rel[1].r_offset = offset + d_offset;
8117 rel[1].r_addend = rel->r_addend;
8118 insn2 = 0x38630000; /* addi 3,3,0 */
8119 bfd_put_32 (input_bfd, insn2, contents + offset);
8120 }
8121 }
8122 bfd_put_32 (input_bfd, insn1,
8123 contents + rel->r_offset - d_offset);
8124 if (tls_gd == 0)
8125 {
8126 /* We changed the symbol on an LD reloc. Start over
8127 in order to get h, sym, sec etc. right. */
8128 goto again;
8129 }
8130 }
8131 break;
8132
8133 case R_PPC_TLSGD:
8134 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
8135 {
8136 unsigned int insn2;
8137 bfd_vma offset = rel->r_offset;
8138
8139 if ((tls_mask & TLS_TPRELGD) != 0)
8140 {
8141 /* IE */
8142 r_type = R_PPC_NONE;
8143 insn2 = 0x7c631214; /* add 3,3,2 */
8144 }
8145 else
8146 {
8147 /* LE */
8148 r_type = R_PPC_TPREL16_LO;
8149 rel->r_offset += d_offset;
8150 insn2 = 0x38630000; /* addi 3,3,0 */
8151 }
8152 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
8153 bfd_put_32 (input_bfd, insn2, contents + offset);
8154 /* Zap the reloc on the _tls_get_addr call too. */
8155 BFD_ASSERT (offset == rel[1].r_offset);
8156 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8157 }
8158 break;
8159
8160 case R_PPC_TLSLD:
8161 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
8162 {
8163 unsigned int insn2;
8164
8165 for (r_symndx = 0;
8166 r_symndx < symtab_hdr->sh_info;
8167 r_symndx++)
8168 if (local_sections[r_symndx] == sec)
8169 break;
8170 if (r_symndx >= symtab_hdr->sh_info)
8171 r_symndx = STN_UNDEF;
8172 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
8173 if (r_symndx != STN_UNDEF)
8174 rel->r_addend -= (local_syms[r_symndx].st_value
8175 + sec->output_offset
8176 + sec->output_section->vma);
8177
8178 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
8179 rel->r_offset += d_offset;
8180 insn2 = 0x38630000; /* addi 3,3,0 */
8181 bfd_put_32 (input_bfd, insn2,
8182 contents + rel->r_offset - d_offset);
8183 /* Zap the reloc on the _tls_get_addr call too. */
8184 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
8185 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
8186 goto again;
8187 }
8188 break;
8189 }
8190
8191 /* Handle other relocations that tweak non-addend part of insn. */
8192 branch_bit = 0;
8193 switch (r_type)
8194 {
8195 default:
8196 break;
8197
8198 /* Branch taken prediction relocations. */
8199 case R_PPC_ADDR14_BRTAKEN:
8200 case R_PPC_REL14_BRTAKEN:
8201 branch_bit = BRANCH_PREDICT_BIT;
8202 /* Fall through. */
8203
8204 /* Branch not taken prediction relocations. */
8205 case R_PPC_ADDR14_BRNTAKEN:
8206 case R_PPC_REL14_BRNTAKEN:
8207 {
8208 bfd_vma insn;
8209
8210 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
8211 insn &= ~BRANCH_PREDICT_BIT;
8212 insn |= branch_bit;
8213
8214 from = (rel->r_offset
8215 + input_section->output_offset
8216 + input_section->output_section->vma);
8217
8218 /* Invert 'y' bit if not the default. */
8219 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
8220 insn ^= BRANCH_PREDICT_BIT;
8221
8222 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
8223 break;
8224 }
8225 }
8226
8227 if (ELIMINATE_COPY_RELOCS
8228 && h != NULL
8229 && !h->def_regular
8230 && h->protected_def
8231 && ppc_elf_hash_entry (h)->has_addr16_ha
8232 && ppc_elf_hash_entry (h)->has_addr16_lo
8233 && htab->params->pic_fixup > 0)
8234 {
8235 /* Convert lis;addi or lis;load/store accessing a protected
8236 variable defined in a shared library to PIC. */
8237 unsigned int insn;
8238
8239 if (r_type == R_PPC_ADDR16_HA)
8240 {
8241 insn = bfd_get_32 (input_bfd,
8242 contents + rel->r_offset - d_offset);
8243 if ((insn & (0x3f << 26)) == (15u << 26)
8244 && (insn & (0x1f << 16)) == 0 /* lis */)
8245 {
8246 bfd_byte *p;
8247 bfd_vma off;
8248 bfd_vma got_addr;
8249
8250 p = (contents + input_section->size
8251 - relax_info->workaround_size
8252 - relax_info->picfixup_size
8253 + picfixup_size);
8254 off = (p - contents) - (rel->r_offset - d_offset);
8255 if (off > 0x1fffffc || (off & 3) != 0)
8256 info->callbacks->einfo
8257 (_("%H: fixup branch overflow\n"),
8258 input_bfd, input_section, rel->r_offset);
8259
8260 bfd_put_32 (input_bfd, B | off,
8261 contents + rel->r_offset - d_offset);
8262 got_addr = (htab->elf.sgot->output_section->vma
8263 + htab->elf.sgot->output_offset
8264 + (h->got.offset & ~1));
8265 wrel->r_offset = (p - contents) + d_offset;
8266 wrel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_HA);
8267 wrel->r_addend = got_addr;
8268 insn &= ~0xffff;
8269 insn |= ((unsigned int) (got_addr + 0x8000) >> 16) & 0xffff;
8270 bfd_put_32 (input_bfd, insn, p);
8271
8272 /* Convert lis to lwz, loading address from GOT. */
8273 insn &= ~0xffff;
8274 insn ^= (32u ^ 15u) << 26;
8275 insn |= (insn & (0x1f << 21)) >> 5;
8276 insn |= got_addr & 0xffff;
8277 bfd_put_32 (input_bfd, insn, p + 4);
8278
8279 bfd_put_32 (input_bfd, B | ((-4 - off) & 0x3ffffff), p + 8);
8280 picfixup_size += 12;
8281
8282 /* Use one of the spare relocs, so --emit-relocs
8283 output is reasonable. */
8284 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8285 wrel++, rel++;
8286 rel->r_offset = wrel[-1].r_offset + 4;
8287 rel->r_info = ELF32_R_INFO (0, R_PPC_ADDR16_LO);
8288 rel->r_addend = wrel[-1].r_addend;
8289
8290 /* Continue on as if we had a got reloc, to output
8291 dynamic reloc. */
8292 r_type = R_PPC_GOT16_LO;
8293 }
8294 else
8295 _bfd_error_handler
8296 /* xgettext:c-format */
8297 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8298 input_bfd, input_section, rel->r_offset,
8299 "R_PPC_ADDR16_HA", insn);
8300 }
8301 else if (r_type == R_PPC_ADDR16_LO)
8302 {
8303 insn = bfd_get_32 (input_bfd,
8304 contents + rel->r_offset - d_offset);
8305 if ((insn & (0x3f << 26)) == 14u << 26 /* addi */
8306 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
8307 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
8308 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
8309 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
8310 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
8311 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
8312 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
8313 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
8314 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
8315 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
8316 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
8317 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
8318 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
8319 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
8320 && (insn & 3) != 1)
8321 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
8322 && ((insn & 3) == 0 || (insn & 3) == 3)))
8323 {
8324 /* Arrange to apply the reloc addend, if any. */
8325 relocation = 0;
8326 unresolved_reloc = FALSE;
8327 rel->r_info = ELF32_R_INFO (0, r_type);
8328 }
8329 else
8330 _bfd_error_handler
8331 /* xgettext:c-format */
8332 (_("%B(%A+%#Lx): error: %s with unexpected instruction %#x"),
8333 input_bfd, input_section, rel->r_offset,
8334 "R_PPC_ADDR16_LO", insn);
8335 }
8336 }
8337
8338 ifunc = NULL;
8339 if (!htab->is_vxworks)
8340 {
8341 struct plt_entry *ent;
8342
8343 if (h != NULL)
8344 {
8345 if (h->type == STT_GNU_IFUNC)
8346 ifunc = &h->plt.plist;
8347 }
8348 else if (local_got_offsets != NULL
8349 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
8350 {
8351 struct plt_entry **local_plt;
8352
8353 local_plt = (struct plt_entry **) (local_got_offsets
8354 + symtab_hdr->sh_info);
8355 ifunc = local_plt + r_symndx;
8356 }
8357
8358 ent = NULL;
8359 if (ifunc != NULL
8360 && (!bfd_link_pic (info)
8361 || is_branch_reloc (r_type)))
8362 {
8363 addend = 0;
8364 if (r_type == R_PPC_PLTREL24 && bfd_link_pic (info))
8365 addend = rel->r_addend;
8366 ent = find_plt_ent (ifunc, got2, addend);
8367 }
8368 if (ent != NULL)
8369 {
8370 if (bfd_link_pic (info)
8371 && ent->sec != got2
8372 && htab->plt_type != PLT_NEW
8373 && (!htab->elf.dynamic_sections_created
8374 || h == NULL
8375 || h->dynindx == -1))
8376 {
8377 /* Uh oh, we are going to create a pic glink stub
8378 for an ifunc (here for h == NULL and later in
8379 finish_dynamic_symbol for h != NULL), and
8380 apparently are using code compiled with
8381 -mbss-plt. The difficulty is that -mbss-plt code
8382 gives no indication via a magic PLTREL24 addend
8383 whether r30 is equal to _GLOBAL_OFFSET_TABLE_ or
8384 is pointing into a .got2 section (and how far
8385 into .got2). */
8386 info->callbacks->einfo
8387 /* xgettext:c-format */
8388 (_("%X%H: unsupported bss-plt -fPIC ifunc %s\n"),
8389 input_bfd, input_section, rel->r_offset, sym_name);
8390 }
8391 if (h == NULL && (ent->plt.offset & 1) == 0)
8392 {
8393 Elf_Internal_Rela rela;
8394 bfd_byte *loc;
8395
8396 rela.r_offset = (htab->elf.iplt->output_section->vma
8397 + htab->elf.iplt->output_offset
8398 + ent->plt.offset);
8399 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8400 rela.r_addend = relocation;
8401 loc = htab->elf.irelplt->contents;
8402 loc += (htab->elf.irelplt->reloc_count++
8403 * sizeof (Elf32_External_Rela));
8404 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
8405 htab->local_ifunc_resolver = 1;
8406
8407 ent->plt.offset |= 1;
8408 }
8409 if (h == NULL && (ent->glink_offset & 1) == 0)
8410 {
8411 unsigned char *p = ((unsigned char *) htab->glink->contents
8412 + ent->glink_offset);
8413 write_glink_stub (ent, htab->elf.iplt, p, info);
8414 ent->glink_offset |= 1;
8415 }
8416
8417 unresolved_reloc = FALSE;
8418 if (htab->plt_type == PLT_NEW
8419 || !htab->elf.dynamic_sections_created
8420 || h == NULL
8421 || h->dynindx == -1)
8422 relocation = (htab->glink->output_section->vma
8423 + htab->glink->output_offset
8424 + (ent->glink_offset & ~1));
8425 else
8426 relocation = (htab->elf.splt->output_section->vma
8427 + htab->elf.splt->output_offset
8428 + ent->plt.offset);
8429 }
8430 }
8431
8432 addend = rel->r_addend;
8433 howto = NULL;
8434 if (r_type < R_PPC_max)
8435 howto = ppc_elf_howto_table[r_type];
8436
8437 switch (r_type)
8438 {
8439 default:
8440 break;
8441
8442 case R_PPC_TPREL16_HA:
8443 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8444 {
8445 bfd_byte *p = contents + (rel->r_offset & ~3);
8446 unsigned int insn = bfd_get_32 (input_bfd, p);
8447 if ((insn & ((0x3f << 26) | 0x1f << 16))
8448 != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)
8449 /* xgettext:c-format */
8450 info->callbacks->minfo
8451 (_("%H: warning: %s unexpected insn %#x.\n"),
8452 input_bfd, input_section, rel->r_offset, howto->name, insn);
8453 else
8454 bfd_put_32 (input_bfd, NOP, p);
8455 }
8456 break;
8457
8458 case R_PPC_TPREL16_LO:
8459 if (htab->do_tls_opt && relocation + addend + 0x8000 < 0x10000)
8460 {
8461 bfd_byte *p = contents + (rel->r_offset & ~3);
8462 unsigned int insn = bfd_get_32 (input_bfd, p);
8463 insn &= ~(0x1f << 16);
8464 insn |= 2 << 16;
8465 bfd_put_32 (input_bfd, insn, p);
8466 }
8467 break;
8468 }
8469
8470 tls_type = 0;
8471 switch (r_type)
8472 {
8473 default:
8474 info->callbacks->einfo
8475 /* xgettext:c-format */
8476 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8477 input_bfd, (int) r_type, sym_name);
8478
8479 bfd_set_error (bfd_error_bad_value);
8480 ret = FALSE;
8481 goto copy_reloc;
8482
8483 case R_PPC_NONE:
8484 case R_PPC_TLS:
8485 case R_PPC_TLSGD:
8486 case R_PPC_TLSLD:
8487 case R_PPC_EMB_MRKREF:
8488 case R_PPC_GNU_VTINHERIT:
8489 case R_PPC_GNU_VTENTRY:
8490 goto copy_reloc;
8491
8492 /* GOT16 relocations. Like an ADDR16 using the symbol's
8493 address in the GOT as relocation value instead of the
8494 symbol's value itself. Also, create a GOT entry for the
8495 symbol and put the symbol value there. */
8496 case R_PPC_GOT_TLSGD16:
8497 case R_PPC_GOT_TLSGD16_LO:
8498 case R_PPC_GOT_TLSGD16_HI:
8499 case R_PPC_GOT_TLSGD16_HA:
8500 tls_type = TLS_TLS | TLS_GD;
8501 goto dogot;
8502
8503 case R_PPC_GOT_TLSLD16:
8504 case R_PPC_GOT_TLSLD16_LO:
8505 case R_PPC_GOT_TLSLD16_HI:
8506 case R_PPC_GOT_TLSLD16_HA:
8507 tls_type = TLS_TLS | TLS_LD;
8508 goto dogot;
8509
8510 case R_PPC_GOT_TPREL16:
8511 case R_PPC_GOT_TPREL16_LO:
8512 case R_PPC_GOT_TPREL16_HI:
8513 case R_PPC_GOT_TPREL16_HA:
8514 tls_type = TLS_TLS | TLS_TPREL;
8515 goto dogot;
8516
8517 case R_PPC_GOT_DTPREL16:
8518 case R_PPC_GOT_DTPREL16_LO:
8519 case R_PPC_GOT_DTPREL16_HI:
8520 case R_PPC_GOT_DTPREL16_HA:
8521 tls_type = TLS_TLS | TLS_DTPREL;
8522 goto dogot;
8523
8524 case R_PPC_GOT16:
8525 case R_PPC_GOT16_LO:
8526 case R_PPC_GOT16_HI:
8527 case R_PPC_GOT16_HA:
8528 tls_mask = 0;
8529 dogot:
8530 {
8531 /* Relocation is to the entry for this symbol in the global
8532 offset table. */
8533 bfd_vma off;
8534 bfd_vma *offp;
8535 unsigned long indx;
8536
8537 if (htab->elf.sgot == NULL)
8538 abort ();
8539
8540 indx = 0;
8541 if (tls_type == (TLS_TLS | TLS_LD)
8542 && (h == NULL
8543 || !h->def_dynamic))
8544 offp = &htab->tlsld_got.offset;
8545 else if (h != NULL)
8546 {
8547 if (!htab->elf.dynamic_sections_created
8548 || h->dynindx == -1
8549 || SYMBOL_REFERENCES_LOCAL (info, h)
8550 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
8551 /* This is actually a static link, or it is a
8552 -Bsymbolic link and the symbol is defined
8553 locally, or the symbol was forced to be local
8554 because of a version file. */
8555 ;
8556 else
8557 {
8558 indx = h->dynindx;
8559 unresolved_reloc = FALSE;
8560 }
8561 offp = &h->got.offset;
8562 }
8563 else
8564 {
8565 if (local_got_offsets == NULL)
8566 abort ();
8567 offp = &local_got_offsets[r_symndx];
8568 }
8569
8570 /* The offset must always be a multiple of 4. We use the
8571 least significant bit to record whether we have already
8572 processed this entry. */
8573 off = *offp;
8574 if ((off & 1) != 0)
8575 off &= ~1;
8576 else
8577 {
8578 unsigned int tls_m = (tls_mask
8579 & (TLS_LD | TLS_GD | TLS_DTPREL
8580 | TLS_TPREL | TLS_TPRELGD));
8581
8582 if (offp == &htab->tlsld_got.offset)
8583 tls_m = TLS_LD;
8584 else if (h == NULL
8585 || !h->def_dynamic)
8586 tls_m &= ~TLS_LD;
8587
8588 /* We might have multiple got entries for this sym.
8589 Initialize them all. */
8590 do
8591 {
8592 int tls_ty = 0;
8593
8594 if ((tls_m & TLS_LD) != 0)
8595 {
8596 tls_ty = TLS_TLS | TLS_LD;
8597 tls_m &= ~TLS_LD;
8598 }
8599 else if ((tls_m & TLS_GD) != 0)
8600 {
8601 tls_ty = TLS_TLS | TLS_GD;
8602 tls_m &= ~TLS_GD;
8603 }
8604 else if ((tls_m & TLS_DTPREL) != 0)
8605 {
8606 tls_ty = TLS_TLS | TLS_DTPREL;
8607 tls_m &= ~TLS_DTPREL;
8608 }
8609 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8610 {
8611 tls_ty = TLS_TLS | TLS_TPREL;
8612 tls_m = 0;
8613 }
8614
8615 /* Generate relocs for the dynamic linker. */
8616 if (indx != 0
8617 || (bfd_link_pic (info)
8618 && (h == NULL
8619 || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
8620 || offp == &htab->tlsld_got.offset)))
8621 {
8622 asection *rsec = htab->elf.srelgot;
8623 bfd_byte * loc;
8624
8625 if (ifunc != NULL)
8626 {
8627 rsec = htab->elf.irelplt;
8628 if (indx == 0)
8629 htab->local_ifunc_resolver = 1;
8630 else if (is_static_defined (h))
8631 htab->maybe_local_ifunc_resolver = 1;
8632 }
8633 outrel.r_offset = (htab->elf.sgot->output_section->vma
8634 + htab->elf.sgot->output_offset
8635 + off);
8636 outrel.r_addend = 0;
8637 if (tls_ty & (TLS_LD | TLS_GD))
8638 {
8639 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8640 if (tls_ty == (TLS_TLS | TLS_GD))
8641 {
8642 loc = rsec->contents;
8643 loc += (rsec->reloc_count++
8644 * sizeof (Elf32_External_Rela));
8645 bfd_elf32_swap_reloca_out (output_bfd,
8646 &outrel, loc);
8647 outrel.r_offset += 4;
8648 outrel.r_info
8649 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8650 }
8651 }
8652 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8653 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8654 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8655 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8656 else if (indx != 0)
8657 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8658 else if (ifunc != NULL)
8659 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8660 else
8661 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8662 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8663 {
8664 outrel.r_addend += relocation;
8665 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8666 {
8667 if (htab->elf.tls_sec == NULL)
8668 outrel.r_addend = 0;
8669 else
8670 outrel.r_addend -= htab->elf.tls_sec->vma;
8671 }
8672 }
8673 loc = rsec->contents;
8674 loc += (rsec->reloc_count++
8675 * sizeof (Elf32_External_Rela));
8676 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8677 }
8678
8679 /* Init the .got section contents if we're not
8680 emitting a reloc. */
8681 else
8682 {
8683 bfd_vma value = relocation;
8684
8685 if (tls_ty != 0)
8686 {
8687 if (htab->elf.tls_sec == NULL)
8688 value = 0;
8689 else
8690 {
8691 if (tls_ty & TLS_LD)
8692 value = 0;
8693 else
8694 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8695 if (tls_ty & TLS_TPREL)
8696 value += DTP_OFFSET - TP_OFFSET;
8697 }
8698
8699 if (tls_ty & (TLS_LD | TLS_GD))
8700 {
8701 bfd_put_32 (input_bfd, value,
8702 htab->elf.sgot->contents + off + 4);
8703 value = 1;
8704 }
8705 }
8706 bfd_put_32 (input_bfd, value,
8707 htab->elf.sgot->contents + off);
8708 }
8709
8710 off += 4;
8711 if (tls_ty & (TLS_LD | TLS_GD))
8712 off += 4;
8713 }
8714 while (tls_m != 0);
8715
8716 off = *offp;
8717 *offp = off | 1;
8718 }
8719
8720 if (off >= (bfd_vma) -2)
8721 abort ();
8722
8723 if ((tls_type & TLS_TLS) != 0)
8724 {
8725 if (tls_type != (TLS_TLS | TLS_LD))
8726 {
8727 if ((tls_mask & TLS_LD) != 0
8728 && !(h == NULL
8729 || !h->def_dynamic))
8730 off += 8;
8731 if (tls_type != (TLS_TLS | TLS_GD))
8732 {
8733 if ((tls_mask & TLS_GD) != 0)
8734 off += 8;
8735 if (tls_type != (TLS_TLS | TLS_DTPREL))
8736 {
8737 if ((tls_mask & TLS_DTPREL) != 0)
8738 off += 4;
8739 }
8740 }
8741 }
8742 }
8743
8744 /* If here for a picfixup, we're done. */
8745 if (r_type != ELF32_R_TYPE (rel->r_info))
8746 goto copy_reloc;
8747
8748 relocation = (htab->elf.sgot->output_section->vma
8749 + htab->elf.sgot->output_offset
8750 + off
8751 - SYM_VAL (htab->elf.hgot));
8752
8753 /* Addends on got relocations don't make much sense.
8754 x+off@got is actually x@got+off, and since the got is
8755 generated by a hash table traversal, the value in the
8756 got at entry m+n bears little relation to the entry m. */
8757 if (addend != 0)
8758 info->callbacks->einfo
8759 /* xgettext:c-format */
8760 (_("%H: non-zero addend on %s reloc against `%s'\n"),
8761 input_bfd, input_section, rel->r_offset,
8762 howto->name,
8763 sym_name);
8764 }
8765 break;
8766
8767 /* Relocations that need no special processing. */
8768 case R_PPC_LOCAL24PC:
8769 /* It makes no sense to point a local relocation
8770 at a symbol not in this object. */
8771 if (unresolved_reloc)
8772 {
8773 (*info->callbacks->undefined_symbol) (info,
8774 h->root.root.string,
8775 input_bfd,
8776 input_section,
8777 rel->r_offset,
8778 TRUE);
8779 goto copy_reloc;
8780 }
8781 if (h != NULL && h->type == STT_GNU_IFUNC && bfd_link_pic (info))
8782 {
8783 /* @local on an ifunc does not really make sense since
8784 the ifunc resolver can take you anywhere. More
8785 seriously, calls to ifuncs must go through a plt call
8786 stub, and for pic the plt call stubs uses r30 to
8787 access the PLT. The problem is that a call that is
8788 local won't have the +32k reloc addend trick marking
8789 -fPIC code, so the linker won't know whether r30 is
8790 _GLOBAL_OFFSET_TABLE_ or pointing into a .got2 section. */
8791 /* xgettext:c-format */
8792 info->callbacks->einfo (_("%X%H: @local call to ifunc %s\n"),
8793 input_bfd, input_section, rel->r_offset,
8794 h->root.root.string);
8795 }
8796 break;
8797
8798 case R_PPC_DTPREL16:
8799 case R_PPC_DTPREL16_LO:
8800 case R_PPC_DTPREL16_HI:
8801 case R_PPC_DTPREL16_HA:
8802 if (htab->elf.tls_sec != NULL)
8803 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8804 break;
8805
8806 /* Relocations that may need to be propagated if this is a shared
8807 object. */
8808 case R_PPC_TPREL16:
8809 case R_PPC_TPREL16_LO:
8810 case R_PPC_TPREL16_HI:
8811 case R_PPC_TPREL16_HA:
8812 if (h != NULL
8813 && h->root.type == bfd_link_hash_undefweak
8814 && h->dynindx == -1)
8815 {
8816 /* Make this relocation against an undefined weak symbol
8817 resolve to zero. This is really just a tweak, since
8818 code using weak externs ought to check that they are
8819 defined before using them. */
8820 bfd_byte *p = contents + rel->r_offset - d_offset;
8821 unsigned int insn = bfd_get_32 (input_bfd, p);
8822 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8823 if (insn != 0)
8824 bfd_put_32 (input_bfd, insn, p);
8825 break;
8826 }
8827 if (htab->elf.tls_sec != NULL)
8828 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8829 /* The TPREL16 relocs shouldn't really be used in shared
8830 libs or with non-local symbols as that will result in
8831 DT_TEXTREL being set, but support them anyway. */
8832 goto dodyn;
8833
8834 case R_PPC_TPREL32:
8835 if (htab->elf.tls_sec != NULL)
8836 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8837 goto dodyn;
8838
8839 case R_PPC_DTPREL32:
8840 if (htab->elf.tls_sec != NULL)
8841 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8842 goto dodyn;
8843
8844 case R_PPC_DTPMOD32:
8845 relocation = 1;
8846 addend = 0;
8847 goto dodyn;
8848
8849 case R_PPC_REL16:
8850 case R_PPC_REL16_LO:
8851 case R_PPC_REL16_HI:
8852 case R_PPC_REL16_HA:
8853 case R_PPC_REL16DX_HA:
8854 break;
8855
8856 case R_PPC_REL32:
8857 if (h == NULL || h == htab->elf.hgot)
8858 break;
8859 /* fall through */
8860
8861 case R_PPC_ADDR32:
8862 case R_PPC_ADDR16:
8863 case R_PPC_ADDR16_LO:
8864 case R_PPC_ADDR16_HI:
8865 case R_PPC_ADDR16_HA:
8866 case R_PPC_UADDR32:
8867 case R_PPC_UADDR16:
8868 goto dodyn;
8869
8870 case R_PPC_VLE_REL8:
8871 case R_PPC_VLE_REL15:
8872 case R_PPC_VLE_REL24:
8873 case R_PPC_REL24:
8874 case R_PPC_REL14:
8875 case R_PPC_REL14_BRTAKEN:
8876 case R_PPC_REL14_BRNTAKEN:
8877 /* If these relocations are not to a named symbol, they can be
8878 handled right here, no need to bother the dynamic linker. */
8879 if (SYMBOL_CALLS_LOCAL (info, h)
8880 || h == htab->elf.hgot)
8881 break;
8882 /* fall through */
8883
8884 case R_PPC_ADDR24:
8885 case R_PPC_ADDR14:
8886 case R_PPC_ADDR14_BRTAKEN:
8887 case R_PPC_ADDR14_BRNTAKEN:
8888 if (h != NULL && !bfd_link_pic (info))
8889 break;
8890 /* fall through */
8891
8892 dodyn:
8893 if ((input_section->flags & SEC_ALLOC) == 0
8894 || is_vxworks_tls)
8895 break;
8896
8897 if ((bfd_link_pic (info)
8898 && !(h != NULL
8899 && ((h->root.type == bfd_link_hash_undefined
8900 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8901 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
8902 && (must_be_dyn_reloc (info, r_type)
8903 || !SYMBOL_CALLS_LOCAL (info, h)))
8904 || (ELIMINATE_COPY_RELOCS
8905 && !bfd_link_pic (info)
8906 && h != NULL
8907 && h->dynindx != -1
8908 && !h->non_got_ref
8909 && !h->def_regular
8910 && !(h->protected_def
8911 && ppc_elf_hash_entry (h)->has_addr16_ha
8912 && ppc_elf_hash_entry (h)->has_addr16_lo
8913 && htab->params->pic_fixup > 0)))
8914 {
8915 int skip;
8916 bfd_byte *loc;
8917 asection *sreloc;
8918 long indx = 0;
8919
8920 #ifdef DEBUG
8921 fprintf (stderr, "ppc_elf_relocate_section needs to "
8922 "create relocation for %s\n",
8923 (h && h->root.root.string
8924 ? h->root.root.string : "<unknown>"));
8925 #endif
8926
8927 /* When generating a shared object, these relocations
8928 are copied into the output file to be resolved at run
8929 time. */
8930 skip = 0;
8931 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8932 input_section,
8933 rel->r_offset);
8934 if (outrel.r_offset == (bfd_vma) -1
8935 || outrel.r_offset == (bfd_vma) -2)
8936 skip = (int) outrel.r_offset;
8937 outrel.r_offset += (input_section->output_section->vma
8938 + input_section->output_offset);
8939
8940 if (skip)
8941 memset (&outrel, 0, sizeof outrel);
8942 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
8943 {
8944 indx = h->dynindx;
8945 BFD_ASSERT (indx != -1);
8946 unresolved_reloc = FALSE;
8947 outrel.r_info = ELF32_R_INFO (indx, r_type);
8948 outrel.r_addend = rel->r_addend;
8949 }
8950 else
8951 {
8952 outrel.r_addend = relocation + rel->r_addend;
8953
8954 if (r_type != R_PPC_ADDR32)
8955 {
8956 if (ifunc != NULL)
8957 {
8958 /* If we get here when building a static
8959 executable, then the libc startup function
8960 responsible for applying indirect function
8961 relocations is going to complain about
8962 the reloc type.
8963 If we get here when building a dynamic
8964 executable, it will be because we have
8965 a text relocation. The dynamic loader
8966 will set the text segment writable and
8967 non-executable to apply text relocations.
8968 So we'll segfault when trying to run the
8969 indirection function to resolve the reloc. */
8970 info->callbacks->einfo
8971 /* xgettext:c-format */
8972 (_("%H: relocation %s for indirect "
8973 "function %s unsupported\n"),
8974 input_bfd, input_section, rel->r_offset,
8975 howto->name,
8976 sym_name);
8977 ret = FALSE;
8978 }
8979 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8980 ;
8981 else if (sec == NULL || sec->owner == NULL)
8982 {
8983 bfd_set_error (bfd_error_bad_value);
8984 ret = FALSE;
8985 }
8986 else
8987 {
8988 asection *osec;
8989
8990 /* We are turning this relocation into one
8991 against a section symbol. It would be
8992 proper to subtract the symbol's value,
8993 osec->vma, from the emitted reloc addend,
8994 but ld.so expects buggy relocs.
8995 FIXME: Why not always use a zero index? */
8996 osec = sec->output_section;
8997 indx = elf_section_data (osec)->dynindx;
8998 if (indx == 0)
8999 {
9000 osec = htab->elf.text_index_section;
9001 indx = elf_section_data (osec)->dynindx;
9002 }
9003 BFD_ASSERT (indx != 0);
9004 #ifdef DEBUG
9005 if (indx == 0)
9006 printf ("indx=%ld section=%s flags=%08x name=%s\n",
9007 indx, osec->name, osec->flags,
9008 h->root.root.string);
9009 #endif
9010 }
9011
9012 outrel.r_info = ELF32_R_INFO (indx, r_type);
9013 }
9014 else if (ifunc != NULL)
9015 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9016 else
9017 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
9018 }
9019
9020 sreloc = elf_section_data (input_section)->sreloc;
9021 if (ifunc)
9022 {
9023 sreloc = htab->elf.irelplt;
9024 if (indx == 0)
9025 htab->local_ifunc_resolver = 1;
9026 else if (is_static_defined (h))
9027 htab->maybe_local_ifunc_resolver = 1;
9028 }
9029 if (sreloc == NULL)
9030 return FALSE;
9031
9032 loc = sreloc->contents;
9033 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
9034 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
9035
9036 if (skip == -1)
9037 goto copy_reloc;
9038
9039 /* This reloc will be computed at runtime. Clear the memory
9040 so that it contains a predictable value for prelink. */
9041 if (!skip)
9042 {
9043 relocation = howto->pc_relative ? outrel.r_offset : 0;
9044 addend = 0;
9045 break;
9046 }
9047 }
9048 break;
9049
9050 case R_PPC_RELAX_PLT:
9051 case R_PPC_RELAX_PLTREL24:
9052 if (h != NULL)
9053 {
9054 struct plt_entry *ent;
9055 bfd_vma got2_addend = 0;
9056
9057 if (r_type == R_PPC_RELAX_PLTREL24)
9058 {
9059 if (bfd_link_pic (info))
9060 got2_addend = addend;
9061 addend = 0;
9062 }
9063 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
9064 if (htab->plt_type == PLT_NEW)
9065 relocation = (htab->glink->output_section->vma
9066 + htab->glink->output_offset
9067 + ent->glink_offset);
9068 else
9069 relocation = (htab->elf.splt->output_section->vma
9070 + htab->elf.splt->output_offset
9071 + ent->plt.offset);
9072 }
9073 /* Fall through. */
9074
9075 case R_PPC_RELAX:
9076 {
9077 const int *stub;
9078 size_t size;
9079 size_t insn_offset = rel->r_offset;
9080 unsigned int insn;
9081
9082 if (bfd_link_pic (info))
9083 {
9084 relocation -= (input_section->output_section->vma
9085 + input_section->output_offset
9086 + rel->r_offset - 4);
9087 stub = shared_stub_entry;
9088 bfd_put_32 (input_bfd, stub[0], contents + insn_offset - 12);
9089 bfd_put_32 (input_bfd, stub[1], contents + insn_offset - 8);
9090 bfd_put_32 (input_bfd, stub[2], contents + insn_offset - 4);
9091 stub += 3;
9092 size = ARRAY_SIZE (shared_stub_entry) - 3;
9093 }
9094 else
9095 {
9096 stub = stub_entry;
9097 size = ARRAY_SIZE (stub_entry);
9098 }
9099
9100 relocation += addend;
9101 if (bfd_link_relocatable (info))
9102 relocation = 0;
9103
9104 /* First insn is HA, second is LO. */
9105 insn = *stub++;
9106 insn |= ((relocation + 0x8000) >> 16) & 0xffff;
9107 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9108 insn_offset += 4;
9109
9110 insn = *stub++;
9111 insn |= relocation & 0xffff;
9112 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9113 insn_offset += 4;
9114 size -= 2;
9115
9116 while (size != 0)
9117 {
9118 insn = *stub++;
9119 --size;
9120 bfd_put_32 (input_bfd, insn, contents + insn_offset);
9121 insn_offset += 4;
9122 }
9123
9124 /* Rewrite the reloc and convert one of the trailing nop
9125 relocs to describe this relocation. */
9126 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
9127 /* The relocs are at the bottom 2 bytes */
9128 wrel->r_offset = rel->r_offset + d_offset;
9129 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
9130 wrel->r_addend = rel->r_addend;
9131 memmove (wrel + 1, wrel, (relend - wrel - 1) * sizeof (*wrel));
9132 wrel++, rel++;
9133 wrel->r_offset += 4;
9134 wrel->r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
9135 }
9136 continue;
9137
9138 /* Indirect .sdata relocation. */
9139 case R_PPC_EMB_SDAI16:
9140 BFD_ASSERT (htab->sdata[0].section != NULL);
9141 if (!is_static_defined (htab->sdata[0].sym))
9142 {
9143 unresolved_reloc = TRUE;
9144 break;
9145 }
9146 relocation
9147 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
9148 h, relocation, rel);
9149 addend = 0;
9150 break;
9151
9152 /* Indirect .sdata2 relocation. */
9153 case R_PPC_EMB_SDA2I16:
9154 BFD_ASSERT (htab->sdata[1].section != NULL);
9155 if (!is_static_defined (htab->sdata[1].sym))
9156 {
9157 unresolved_reloc = TRUE;
9158 break;
9159 }
9160 relocation
9161 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
9162 h, relocation, rel);
9163 addend = 0;
9164 break;
9165
9166 /* Handle the TOC16 reloc. We want to use the offset within the .got
9167 section, not the actual VMA. This is appropriate when generating
9168 an embedded ELF object, for which the .got section acts like the
9169 AIX .toc section. */
9170 case R_PPC_TOC16: /* phony GOT16 relocations */
9171 if (sec == NULL || sec->output_section == NULL)
9172 {
9173 unresolved_reloc = TRUE;
9174 break;
9175 }
9176 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
9177 ".got") == 0
9178 || strcmp (bfd_get_section_name (sec->owner, sec),
9179 ".cgot") == 0);
9180
9181 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
9182 break;
9183
9184 case R_PPC_PLTREL24:
9185 if (h != NULL && ifunc == NULL)
9186 {
9187 struct plt_entry *ent;
9188
9189 ent = find_plt_ent (&h->plt.plist, got2,
9190 bfd_link_pic (info) ? addend : 0);
9191 if (ent == NULL
9192 || htab->elf.splt == NULL)
9193 {
9194 /* We didn't make a PLT entry for this symbol. This
9195 happens when statically linking PIC code, or when
9196 using -Bsymbolic. */
9197 }
9198 else
9199 {
9200 /* Relocation is to the entry for this symbol in the
9201 procedure linkage table. */
9202 unresolved_reloc = FALSE;
9203 if (htab->plt_type == PLT_NEW)
9204 relocation = (htab->glink->output_section->vma
9205 + htab->glink->output_offset
9206 + ent->glink_offset);
9207 else
9208 relocation = (htab->elf.splt->output_section->vma
9209 + htab->elf.splt->output_offset
9210 + ent->plt.offset);
9211 }
9212 }
9213
9214 /* R_PPC_PLTREL24 is rather special. If non-zero, the
9215 addend specifies the GOT pointer offset within .got2.
9216 Don't apply it to the relocation field. */
9217 addend = 0;
9218 break;
9219
9220 /* Relocate against _SDA_BASE_. */
9221 case R_PPC_SDAREL16:
9222 {
9223 const char *name;
9224 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
9225
9226 if (sec == NULL
9227 || sec->output_section == NULL
9228 || !is_static_defined (sda))
9229 {
9230 unresolved_reloc = TRUE;
9231 break;
9232 }
9233 addend -= SYM_VAL (sda);
9234
9235 name = bfd_get_section_name (output_bfd, sec->output_section);
9236 if (!(strcmp (name, ".sdata") == 0
9237 || strcmp (name, ".sbss") == 0))
9238 {
9239 info->callbacks->einfo
9240 /* xgettext:c-format */
9241 (_("%P: %B: the target (%s) of a %s relocation is "
9242 "in the wrong output section (%s)\n"),
9243 input_bfd,
9244 sym_name,
9245 howto->name,
9246 name);
9247 }
9248 }
9249 break;
9250
9251 /* Relocate against _SDA2_BASE_. */
9252 case R_PPC_EMB_SDA2REL:
9253 {
9254 const char *name;
9255 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
9256
9257 if (sec == NULL
9258 || sec->output_section == NULL
9259 || !is_static_defined (sda))
9260 {
9261 unresolved_reloc = TRUE;
9262 break;
9263 }
9264 addend -= SYM_VAL (sda);
9265
9266 name = bfd_get_section_name (output_bfd, sec->output_section);
9267 if (!(strcmp (name, ".sdata2") == 0
9268 || strcmp (name, ".sbss2") == 0))
9269 {
9270 info->callbacks->einfo
9271 /* xgettext:c-format */
9272 (_("%P: %B: the target (%s) of a %s relocation is "
9273 "in the wrong output section (%s)\n"),
9274 input_bfd,
9275 sym_name,
9276 howto->name,
9277 name);
9278 }
9279 }
9280 break;
9281
9282 case R_PPC_VLE_LO16A:
9283 relocation = relocation + addend;
9284 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9285 contents + rel->r_offset, relocation,
9286 split16a_type, htab->params->vle_reloc_fixup);
9287 goto copy_reloc;
9288
9289 case R_PPC_VLE_LO16D:
9290 relocation = relocation + addend;
9291 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9292 contents + rel->r_offset, relocation,
9293 split16d_type, htab->params->vle_reloc_fixup);
9294 goto copy_reloc;
9295
9296 case R_PPC_VLE_HI16A:
9297 relocation = (relocation + addend) >> 16;
9298 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9299 contents + rel->r_offset, relocation,
9300 split16a_type, htab->params->vle_reloc_fixup);
9301 goto copy_reloc;
9302
9303 case R_PPC_VLE_HI16D:
9304 relocation = (relocation + addend) >> 16;
9305 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9306 contents + rel->r_offset, relocation,
9307 split16d_type, htab->params->vle_reloc_fixup);
9308 goto copy_reloc;
9309
9310 case R_PPC_VLE_HA16A:
9311 relocation = (relocation + addend + 0x8000) >> 16;
9312 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9313 contents + rel->r_offset, relocation,
9314 split16a_type, htab->params->vle_reloc_fixup);
9315 goto copy_reloc;
9316
9317 case R_PPC_VLE_HA16D:
9318 relocation = (relocation + addend + 0x8000) >> 16;
9319 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9320 contents + rel->r_offset, relocation,
9321 split16d_type, htab->params->vle_reloc_fixup);
9322 goto copy_reloc;
9323
9324 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
9325 case R_PPC_EMB_SDA21:
9326 case R_PPC_VLE_SDA21:
9327 case R_PPC_EMB_RELSDA:
9328 case R_PPC_VLE_SDA21_LO:
9329 {
9330 const char *name;
9331 int reg;
9332 unsigned int insn;
9333 struct elf_link_hash_entry *sda = NULL;
9334
9335 if (sec == NULL || sec->output_section == NULL)
9336 {
9337 unresolved_reloc = TRUE;
9338 break;
9339 }
9340
9341 name = bfd_get_section_name (output_bfd, sec->output_section);
9342 if (strcmp (name, ".sdata") == 0
9343 || strcmp (name, ".sbss") == 0)
9344 {
9345 reg = 13;
9346 sda = htab->sdata[0].sym;
9347 }
9348 else if (strcmp (name, ".sdata2") == 0
9349 || strcmp (name, ".sbss2") == 0)
9350 {
9351 reg = 2;
9352 sda = htab->sdata[1].sym;
9353 }
9354 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
9355 || strcmp (name, ".PPC.EMB.sbss0") == 0)
9356 {
9357 reg = 0;
9358 }
9359 else
9360 {
9361 info->callbacks->einfo
9362 /* xgettext:c-format */
9363 (_("%P: %B: the target (%s) of a %s relocation is "
9364 "in the wrong output section (%s)\n"),
9365 input_bfd,
9366 sym_name,
9367 howto->name,
9368 name);
9369
9370 bfd_set_error (bfd_error_bad_value);
9371 ret = FALSE;
9372 goto copy_reloc;
9373 }
9374
9375 if (sda != NULL)
9376 {
9377 if (!is_static_defined (sda))
9378 {
9379 unresolved_reloc = TRUE;
9380 break;
9381 }
9382 addend -= SYM_VAL (sda);
9383 }
9384
9385 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9386 if (reg == 0
9387 && (r_type == R_PPC_VLE_SDA21
9388 || r_type == R_PPC_VLE_SDA21_LO))
9389 {
9390 relocation = relocation + addend;
9391 addend = 0;
9392
9393 /* Force e_li insn, keeping RT from original insn. */
9394 insn &= 0x1f << 21;
9395 insn |= 28u << 26;
9396
9397 /* We have an li20 field, bits 17..20, 11..15, 21..31. */
9398 /* Top 4 bits of value to 17..20. */
9399 insn |= (relocation & 0xf0000) >> 5;
9400 /* Next 5 bits of the value to 11..15. */
9401 insn |= (relocation & 0xf800) << 5;
9402 /* And the final 11 bits of the value to bits 21 to 31. */
9403 insn |= relocation & 0x7ff;
9404
9405 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9406
9407 if (r_type == R_PPC_VLE_SDA21
9408 && ((relocation + 0x80000) & 0xffffffff) > 0x100000)
9409 goto overflow;
9410 goto copy_reloc;
9411 }
9412 else if (r_type == R_PPC_EMB_SDA21
9413 || r_type == R_PPC_VLE_SDA21
9414 || r_type == R_PPC_VLE_SDA21_LO)
9415 {
9416 /* Fill in register field. */
9417 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
9418 }
9419 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9420 }
9421 break;
9422
9423 case R_PPC_VLE_SDAREL_LO16A:
9424 case R_PPC_VLE_SDAREL_LO16D:
9425 case R_PPC_VLE_SDAREL_HI16A:
9426 case R_PPC_VLE_SDAREL_HI16D:
9427 case R_PPC_VLE_SDAREL_HA16A:
9428 case R_PPC_VLE_SDAREL_HA16D:
9429 {
9430 bfd_vma value;
9431 const char *name;
9432 struct elf_link_hash_entry *sda = NULL;
9433
9434 if (sec == NULL || sec->output_section == NULL)
9435 {
9436 unresolved_reloc = TRUE;
9437 break;
9438 }
9439
9440 name = bfd_get_section_name (output_bfd, sec->output_section);
9441 if (strcmp (name, ".sdata") == 0
9442 || strcmp (name, ".sbss") == 0)
9443 sda = htab->sdata[0].sym;
9444 else if (strcmp (name, ".sdata2") == 0
9445 || strcmp (name, ".sbss2") == 0)
9446 sda = htab->sdata[1].sym;
9447 else
9448 {
9449 _bfd_error_handler
9450 /* xgettext:c-format */
9451 (_("%B: the target (%s) of a %s relocation is "
9452 "in the wrong output section (%s)"),
9453 input_bfd,
9454 sym_name,
9455 howto->name,
9456 name);
9457
9458 bfd_set_error (bfd_error_bad_value);
9459 ret = FALSE;
9460 goto copy_reloc;
9461 }
9462
9463 if (sda == NULL || !is_static_defined (sda))
9464 {
9465 unresolved_reloc = TRUE;
9466 break;
9467 }
9468 value = relocation + addend - SYM_VAL (sda);
9469
9470 if (r_type == R_PPC_VLE_SDAREL_LO16A)
9471 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9472 contents + rel->r_offset, value,
9473 split16a_type,
9474 htab->params->vle_reloc_fixup);
9475 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
9476 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9477 contents + rel->r_offset, value,
9478 split16d_type,
9479 htab->params->vle_reloc_fixup);
9480 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
9481 {
9482 value = value >> 16;
9483 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9484 contents + rel->r_offset, value,
9485 split16a_type,
9486 htab->params->vle_reloc_fixup);
9487 }
9488 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
9489 {
9490 value = value >> 16;
9491 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9492 contents + rel->r_offset, value,
9493 split16d_type,
9494 htab->params->vle_reloc_fixup);
9495 }
9496 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
9497 {
9498 value = (value + 0x8000) >> 16;
9499 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9500 contents + rel->r_offset, value,
9501 split16a_type,
9502 htab->params->vle_reloc_fixup);
9503 }
9504 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
9505 {
9506 value = (value + 0x8000) >> 16;
9507 ppc_elf_vle_split16 (input_bfd, input_section, rel->r_offset,
9508 contents + rel->r_offset, value,
9509 split16d_type,
9510 htab->params->vle_reloc_fixup);
9511 }
9512 }
9513 goto copy_reloc;
9514
9515 /* Relocate against the beginning of the section. */
9516 case R_PPC_SECTOFF:
9517 case R_PPC_SECTOFF_LO:
9518 case R_PPC_SECTOFF_HI:
9519 case R_PPC_SECTOFF_HA:
9520 if (sec == NULL || sec->output_section == NULL)
9521 {
9522 unresolved_reloc = TRUE;
9523 break;
9524 }
9525 addend -= sec->output_section->vma;
9526 break;
9527
9528 /* Negative relocations. */
9529 case R_PPC_EMB_NADDR32:
9530 case R_PPC_EMB_NADDR16:
9531 case R_PPC_EMB_NADDR16_LO:
9532 case R_PPC_EMB_NADDR16_HI:
9533 case R_PPC_EMB_NADDR16_HA:
9534 addend -= 2 * relocation;
9535 break;
9536
9537 case R_PPC_COPY:
9538 case R_PPC_GLOB_DAT:
9539 case R_PPC_JMP_SLOT:
9540 case R_PPC_RELATIVE:
9541 case R_PPC_IRELATIVE:
9542 case R_PPC_PLT32:
9543 case R_PPC_PLTREL32:
9544 case R_PPC_PLT16_LO:
9545 case R_PPC_PLT16_HI:
9546 case R_PPC_PLT16_HA:
9547 case R_PPC_ADDR30:
9548 case R_PPC_EMB_RELSEC16:
9549 case R_PPC_EMB_RELST_LO:
9550 case R_PPC_EMB_RELST_HI:
9551 case R_PPC_EMB_RELST_HA:
9552 case R_PPC_EMB_BIT_FLD:
9553 info->callbacks->einfo
9554 /* xgettext:c-format */
9555 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9556 input_bfd,
9557 howto->name,
9558 sym_name);
9559
9560 bfd_set_error (bfd_error_invalid_operation);
9561 ret = FALSE;
9562 goto copy_reloc;
9563 }
9564
9565 /* Do any further special processing. */
9566 switch (r_type)
9567 {
9568 default:
9569 break;
9570
9571 case R_PPC_ADDR16_HA:
9572 case R_PPC_REL16_HA:
9573 case R_PPC_REL16DX_HA:
9574 case R_PPC_SECTOFF_HA:
9575 case R_PPC_TPREL16_HA:
9576 case R_PPC_DTPREL16_HA:
9577 case R_PPC_EMB_NADDR16_HA:
9578 case R_PPC_EMB_RELST_HA:
9579 /* It's just possible that this symbol is a weak symbol
9580 that's not actually defined anywhere. In that case,
9581 'sec' would be NULL, and we should leave the symbol
9582 alone (it will be set to zero elsewhere in the link). */
9583 if (sec == NULL)
9584 break;
9585 /* Fall through. */
9586
9587 case R_PPC_PLT16_HA:
9588 case R_PPC_GOT16_HA:
9589 case R_PPC_GOT_TLSGD16_HA:
9590 case R_PPC_GOT_TLSLD16_HA:
9591 case R_PPC_GOT_TPREL16_HA:
9592 case R_PPC_GOT_DTPREL16_HA:
9593 /* Add 0x10000 if sign bit in 0:15 is set.
9594 Bits 0:15 are not used. */
9595 addend += 0x8000;
9596 break;
9597
9598 case R_PPC_ADDR16:
9599 case R_PPC_ADDR16_LO:
9600 case R_PPC_GOT16:
9601 case R_PPC_GOT16_LO:
9602 case R_PPC_SDAREL16:
9603 case R_PPC_SECTOFF:
9604 case R_PPC_SECTOFF_LO:
9605 case R_PPC_DTPREL16:
9606 case R_PPC_DTPREL16_LO:
9607 case R_PPC_TPREL16:
9608 case R_PPC_TPREL16_LO:
9609 case R_PPC_GOT_TLSGD16:
9610 case R_PPC_GOT_TLSGD16_LO:
9611 case R_PPC_GOT_TLSLD16:
9612 case R_PPC_GOT_TLSLD16_LO:
9613 case R_PPC_GOT_DTPREL16:
9614 case R_PPC_GOT_DTPREL16_LO:
9615 case R_PPC_GOT_TPREL16:
9616 case R_PPC_GOT_TPREL16_LO:
9617 {
9618 /* The 32-bit ABI lacks proper relocations to deal with
9619 certain 64-bit instructions. Prevent damage to bits
9620 that make up part of the insn opcode. */
9621 unsigned int insn, mask, lobit;
9622
9623 insn = bfd_get_32 (input_bfd,
9624 contents + rel->r_offset - d_offset);
9625 mask = 0;
9626 if (is_insn_ds_form (insn))
9627 mask = 3;
9628 else if (is_insn_dq_form (insn))
9629 mask = 15;
9630 else
9631 break;
9632 relocation += addend;
9633 addend = insn & mask;
9634 lobit = mask & relocation;
9635 if (lobit != 0)
9636 {
9637 relocation ^= lobit;
9638 info->callbacks->einfo
9639 /* xgettext:c-format */
9640 (_("%H: error: %s against `%s' not a multiple of %u\n"),
9641 input_bfd, input_section, rel->r_offset,
9642 howto->name, sym_name, mask + 1);
9643 bfd_set_error (bfd_error_bad_value);
9644 ret = FALSE;
9645 }
9646 }
9647 break;
9648 }
9649
9650 #ifdef DEBUG
9651 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9652 "offset = %ld, addend = %ld\n",
9653 howto->name,
9654 (int) r_type,
9655 sym_name,
9656 r_symndx,
9657 (long) rel->r_offset,
9658 (long) addend);
9659 #endif
9660
9661 if (unresolved_reloc
9662 && !((input_section->flags & SEC_DEBUGGING) != 0
9663 && h->def_dynamic)
9664 && _bfd_elf_section_offset (output_bfd, info, input_section,
9665 rel->r_offset) != (bfd_vma) -1)
9666 {
9667 info->callbacks->einfo
9668 /* xgettext:c-format */
9669 (_("%H: unresolvable %s relocation against symbol `%s'\n"),
9670 input_bfd, input_section, rel->r_offset,
9671 howto->name,
9672 sym_name);
9673 ret = FALSE;
9674 }
9675
9676 /* 16-bit fields in insns mostly have signed values, but a
9677 few insns have 16-bit unsigned values. Really, we should
9678 have different reloc types. */
9679 if (howto->complain_on_overflow != complain_overflow_dont
9680 && howto->dst_mask == 0xffff
9681 && (input_section->flags & SEC_CODE) != 0)
9682 {
9683 enum complain_overflow complain = complain_overflow_signed;
9684
9685 if ((elf_section_flags (input_section) & SHF_PPC_VLE) == 0)
9686 {
9687 unsigned int insn;
9688
9689 insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3));
9690 if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */)
9691 complain = complain_overflow_bitfield;
9692 else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */
9693 || (insn & (0x3f << 26)) == 24u << 26 /* ori */
9694 || (insn & (0x3f << 26)) == 26u << 26 /* xori */)
9695 complain = complain_overflow_unsigned;
9696 }
9697 if (howto->complain_on_overflow != complain)
9698 {
9699 alt_howto = *howto;
9700 alt_howto.complain_on_overflow = complain;
9701 howto = &alt_howto;
9702 }
9703 }
9704
9705 if (r_type == R_PPC_REL16DX_HA)
9706 {
9707 /* Split field reloc isn't handled by _bfd_final_link_relocate. */
9708 if (rel->r_offset + 4 > input_section->size)
9709 r = bfd_reloc_outofrange;
9710 else
9711 {
9712 unsigned int insn;
9713
9714 relocation += addend;
9715 relocation -= (rel->r_offset
9716 + input_section->output_offset
9717 + input_section->output_section->vma);
9718 relocation >>= 16;
9719 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
9720 insn &= ~0x1fffc1;
9721 insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15);
9722 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
9723 r = bfd_reloc_ok;
9724 }
9725 }
9726 else
9727 r = _bfd_final_link_relocate (howto, input_bfd, input_section, contents,
9728 rel->r_offset, relocation, addend);
9729
9730 if (r != bfd_reloc_ok)
9731 {
9732 if (r == bfd_reloc_overflow)
9733 {
9734 overflow:
9735 /* On code like "if (foo) foo();" don't report overflow
9736 on a branch to zero when foo is undefined. */
9737 if (!warned
9738 && !(h != NULL
9739 && (h->root.type == bfd_link_hash_undefweak
9740 || h->root.type == bfd_link_hash_undefined)
9741 && is_branch_reloc (r_type)))
9742 info->callbacks->reloc_overflow
9743 (info, (h ? &h->root : NULL), sym_name, howto->name,
9744 rel->r_addend, input_bfd, input_section, rel->r_offset);
9745 }
9746 else
9747 {
9748 info->callbacks->einfo
9749 /* xgettext:c-format */
9750 (_("%H: %s reloc against `%s': error %d\n"),
9751 input_bfd, input_section, rel->r_offset,
9752 howto->name, sym_name, (int) r);
9753 ret = FALSE;
9754 }
9755 }
9756 copy_reloc:
9757 if (wrel != rel)
9758 *wrel = *rel;
9759 }
9760
9761 if (wrel != rel)
9762 {
9763 Elf_Internal_Shdr *rel_hdr;
9764 size_t deleted = rel - wrel;
9765
9766 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
9767 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9768 if (rel_hdr->sh_size == 0)
9769 {
9770 /* It is too late to remove an empty reloc section. Leave
9771 one NONE reloc.
9772 ??? What is wrong with an empty section??? */
9773 rel_hdr->sh_size = rel_hdr->sh_entsize;
9774 deleted -= 1;
9775 wrel++;
9776 }
9777 relend = wrel;
9778 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
9779 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
9780 input_section->reloc_count -= deleted;
9781 }
9782
9783 #ifdef DEBUG
9784 fprintf (stderr, "\n");
9785 #endif
9786
9787 if (input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9788 && input_section->size != input_section->rawsize
9789 && (strcmp (input_section->output_section->name, ".init") == 0
9790 || strcmp (input_section->output_section->name, ".fini") == 0))
9791 {
9792 /* Branch around the trampolines. */
9793 unsigned int insn = B + input_section->size - input_section->rawsize;
9794 bfd_put_32 (input_bfd, insn, contents + input_section->rawsize);
9795 }
9796
9797 if (htab->params->ppc476_workaround
9798 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET
9799 && (!bfd_link_relocatable (info)
9800 || (input_section->output_section->alignment_power
9801 >= htab->params->pagesize_p2)))
9802 {
9803 bfd_vma start_addr, end_addr, addr;
9804 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
9805
9806 if (relax_info->workaround_size != 0)
9807 {
9808 bfd_byte *p;
9809 unsigned int n;
9810 bfd_byte fill[4];
9811
9812 bfd_put_32 (input_bfd, BA, fill);
9813 p = contents + input_section->size - relax_info->workaround_size;
9814 n = relax_info->workaround_size >> 2;
9815 while (n--)
9816 {
9817 memcpy (p, fill, 4);
9818 p += 4;
9819 }
9820 }
9821
9822 /* The idea is: Replace the last instruction on a page with a
9823 branch to a patch area. Put the insn there followed by a
9824 branch back to the next page. Complicated a little by
9825 needing to handle moved conditional branches, and by not
9826 wanting to touch data-in-text. */
9827
9828 start_addr = (input_section->output_section->vma
9829 + input_section->output_offset);
9830 end_addr = (start_addr + input_section->size
9831 - relax_info->workaround_size);
9832 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9833 addr < end_addr;
9834 addr += pagesize)
9835 {
9836 bfd_vma offset = addr - start_addr;
9837 Elf_Internal_Rela *lo, *hi;
9838 bfd_boolean is_data;
9839 bfd_vma patch_off, patch_addr;
9840 unsigned int insn;
9841
9842 /* Do we have a data reloc at this offset? If so, leave
9843 the word alone. */
9844 is_data = FALSE;
9845 lo = relocs;
9846 hi = relend;
9847 rel = NULL;
9848 while (lo < hi)
9849 {
9850 rel = lo + (hi - lo) / 2;
9851 if (rel->r_offset < offset)
9852 lo = rel + 1;
9853 else if (rel->r_offset > offset + 3)
9854 hi = rel;
9855 else
9856 {
9857 switch (ELF32_R_TYPE (rel->r_info))
9858 {
9859 case R_PPC_ADDR32:
9860 case R_PPC_UADDR32:
9861 case R_PPC_REL32:
9862 case R_PPC_ADDR30:
9863 is_data = TRUE;
9864 break;
9865 default:
9866 break;
9867 }
9868 break;
9869 }
9870 }
9871 if (is_data)
9872 continue;
9873
9874 /* Some instructions can be left alone too. Unconditional
9875 branches, except for bcctr with BO=0x14 (bctr, bctrl),
9876 avoid the icache failure.
9877
9878 The problem occurs due to prefetch across a page boundary
9879 where stale instructions can be fetched from the next
9880 page, and the mechanism for flushing these bad
9881 instructions fails under certain circumstances. The
9882 unconditional branches:
9883 1) Branch: b, bl, ba, bla,
9884 2) Branch Conditional: bc, bca, bcl, bcla,
9885 3) Branch Conditional to Link Register: bclr, bclrl,
9886 where (2) and (3) have BO=0x14 making them unconditional,
9887 prevent the bad prefetch because the prefetch itself is
9888 affected by these instructions. This happens even if the
9889 instruction is not executed.
9890
9891 A bctr example:
9892 .
9893 . lis 9,new_page@ha
9894 . addi 9,9,new_page@l
9895 . mtctr 9
9896 . bctr
9897 . nop
9898 . nop
9899 . new_page:
9900 .
9901 The bctr is not predicted taken due to ctr not being
9902 ready, so prefetch continues on past the bctr into the
9903 new page which might have stale instructions. If they
9904 fail to be flushed, then they will be executed after the
9905 bctr executes. Either of the following modifications
9906 prevent the bad prefetch from happening in the first
9907 place:
9908 .
9909 . lis 9,new_page@ha lis 9,new_page@ha
9910 . addi 9,9,new_page@l addi 9,9,new_page@l
9911 . mtctr 9 mtctr 9
9912 . bctr bctr
9913 . nop b somewhere_else
9914 . b somewhere_else nop
9915 . new_page: new_page:
9916 . */
9917 insn = bfd_get_32 (input_bfd, contents + offset);
9918 if ((insn & (0x3f << 26)) == (18u << 26) /* b,bl,ba,bla */
9919 || ((insn & (0x3f << 26)) == (16u << 26) /* bc,bcl,bca,bcla*/
9920 && (insn & (0x14 << 21)) == (0x14 << 21)) /* with BO=0x14 */
9921 || ((insn & (0x3f << 26)) == (19u << 26)
9922 && (insn & (0x3ff << 1)) == (16u << 1) /* bclr,bclrl */
9923 && (insn & (0x14 << 21)) == (0x14 << 21)))/* with BO=0x14 */
9924 continue;
9925
9926 patch_addr = (start_addr + input_section->size
9927 - relax_info->workaround_size);
9928 patch_addr = (patch_addr + 15) & -16;
9929 patch_off = patch_addr - start_addr;
9930 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9931
9932 if (rel != NULL
9933 && rel->r_offset >= offset
9934 && rel->r_offset < offset + 4)
9935 {
9936 asection *sreloc;
9937
9938 /* If the insn we are patching had a reloc, adjust the
9939 reloc r_offset so that the reloc applies to the moved
9940 location. This matters for -r and --emit-relocs. */
9941 if (rel + 1 != relend)
9942 {
9943 Elf_Internal_Rela tmp = *rel;
9944
9945 /* Keep the relocs sorted by r_offset. */
9946 memmove (rel, rel + 1, (relend - (rel + 1)) * sizeof (*rel));
9947 relend[-1] = tmp;
9948 }
9949 relend[-1].r_offset += patch_off - offset;
9950
9951 /* Adjust REL16 addends too. */
9952 switch (ELF32_R_TYPE (relend[-1].r_info))
9953 {
9954 case R_PPC_REL16:
9955 case R_PPC_REL16_LO:
9956 case R_PPC_REL16_HI:
9957 case R_PPC_REL16_HA:
9958 relend[-1].r_addend += patch_off - offset;
9959 break;
9960 default:
9961 break;
9962 }
9963
9964 /* If we are building a PIE or shared library with
9965 non-PIC objects, perhaps we had a dynamic reloc too?
9966 If so, the dynamic reloc must move with the insn. */
9967 sreloc = elf_section_data (input_section)->sreloc;
9968 if (sreloc != NULL)
9969 {
9970 Elf32_External_Rela *slo, *shi, *srelend;
9971 bfd_vma soffset;
9972
9973 slo = (Elf32_External_Rela *) sreloc->contents;
9974 shi = srelend = slo + sreloc->reloc_count;
9975 soffset = (offset + input_section->output_section->vma
9976 + input_section->output_offset);
9977 while (slo < shi)
9978 {
9979 Elf32_External_Rela *srel = slo + (shi - slo) / 2;
9980 bfd_elf32_swap_reloca_in (output_bfd, (bfd_byte *) srel,
9981 &outrel);
9982 if (outrel.r_offset < soffset)
9983 slo = srel + 1;
9984 else if (outrel.r_offset > soffset + 3)
9985 shi = srel;
9986 else
9987 {
9988 if (srel + 1 != srelend)
9989 {
9990 memmove (srel, srel + 1,
9991 (srelend - (srel + 1)) * sizeof (*srel));
9992 srel = srelend - 1;
9993 }
9994 outrel.r_offset += patch_off - offset;
9995 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
9996 (bfd_byte *) srel);
9997 break;
9998 }
9999 }
10000 }
10001 }
10002 else
10003 rel = NULL;
10004
10005 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
10006 && (insn & 2) == 0 /* relative */)
10007 {
10008 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
10009
10010 delta += offset - patch_off;
10011 if (bfd_link_relocatable (info) && rel != NULL)
10012 delta = 0;
10013 if (!bfd_link_relocatable (info) && rel != NULL)
10014 {
10015 enum elf_ppc_reloc_type r_type;
10016
10017 r_type = ELF32_R_TYPE (relend[-1].r_info);
10018 if (r_type == R_PPC_REL14_BRTAKEN)
10019 insn |= BRANCH_PREDICT_BIT;
10020 else if (r_type == R_PPC_REL14_BRNTAKEN)
10021 insn &= ~BRANCH_PREDICT_BIT;
10022 else
10023 BFD_ASSERT (r_type == R_PPC_REL14);
10024
10025 if ((r_type == R_PPC_REL14_BRTAKEN
10026 || r_type == R_PPC_REL14_BRNTAKEN)
10027 && delta + 0x8000 < 0x10000
10028 && (bfd_signed_vma) delta < 0)
10029 insn ^= BRANCH_PREDICT_BIT;
10030 }
10031 if (delta + 0x8000 < 0x10000)
10032 {
10033 bfd_put_32 (input_bfd,
10034 (insn & ~0xfffc) | (delta & 0xfffc),
10035 contents + patch_off);
10036 patch_off += 4;
10037 bfd_put_32 (input_bfd,
10038 B | ((offset + 4 - patch_off) & 0x3fffffc),
10039 contents + patch_off);
10040 patch_off += 4;
10041 }
10042 else
10043 {
10044 if (rel != NULL)
10045 {
10046 unsigned int r_sym = ELF32_R_SYM (relend[-1].r_info);
10047
10048 relend[-1].r_offset += 8;
10049 relend[-1].r_info = ELF32_R_INFO (r_sym, R_PPC_REL24);
10050 }
10051 bfd_put_32 (input_bfd,
10052 (insn & ~0xfffc) | 8,
10053 contents + patch_off);
10054 patch_off += 4;
10055 bfd_put_32 (input_bfd,
10056 B | ((offset + 4 - patch_off) & 0x3fffffc),
10057 contents + patch_off);
10058 patch_off += 4;
10059 bfd_put_32 (input_bfd,
10060 B | ((delta - 8) & 0x3fffffc),
10061 contents + patch_off);
10062 patch_off += 4;
10063 }
10064 }
10065 else
10066 {
10067 bfd_put_32 (input_bfd, insn, contents + patch_off);
10068 patch_off += 4;
10069 bfd_put_32 (input_bfd,
10070 B | ((offset + 4 - patch_off) & 0x3fffffc),
10071 contents + patch_off);
10072 patch_off += 4;
10073 }
10074 BFD_ASSERT (patch_off <= input_section->size);
10075 relax_info->workaround_size = input_section->size - patch_off;
10076 }
10077 }
10078
10079 return ret;
10080 }
10081 \f
10082 /* Finish up dynamic symbol handling. We set the contents of various
10083 dynamic sections here. */
10084
10085 static bfd_boolean
10086 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
10087 struct bfd_link_info *info,
10088 struct elf_link_hash_entry *h,
10089 Elf_Internal_Sym *sym)
10090 {
10091 struct ppc_elf_link_hash_table *htab;
10092 struct plt_entry *ent;
10093 bfd_boolean doneone;
10094
10095 #ifdef DEBUG
10096 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
10097 h->root.root.string);
10098 #endif
10099
10100 htab = ppc_elf_hash_table (info);
10101 BFD_ASSERT (htab->elf.dynobj != NULL);
10102
10103 doneone = FALSE;
10104 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
10105 if (ent->plt.offset != (bfd_vma) -1)
10106 {
10107 if (!doneone)
10108 {
10109 Elf_Internal_Rela rela;
10110 bfd_byte *loc;
10111 bfd_vma reloc_index;
10112
10113 if (htab->plt_type == PLT_NEW
10114 || !htab->elf.dynamic_sections_created
10115 || h->dynindx == -1)
10116 reloc_index = ent->plt.offset / 4;
10117 else
10118 {
10119 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
10120 / htab->plt_slot_size);
10121 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
10122 && htab->plt_type == PLT_OLD)
10123 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
10124 }
10125
10126 /* This symbol has an entry in the procedure linkage table.
10127 Set it up. */
10128 if (htab->plt_type == PLT_VXWORKS
10129 && htab->elf.dynamic_sections_created
10130 && h->dynindx != -1)
10131 {
10132 bfd_vma got_offset;
10133 const bfd_vma *plt_entry;
10134
10135 /* The first three entries in .got.plt are reserved. */
10136 got_offset = (reloc_index + 3) * 4;
10137
10138 /* Use the right PLT. */
10139 plt_entry = bfd_link_pic (info) ? ppc_elf_vxworks_pic_plt_entry
10140 : ppc_elf_vxworks_plt_entry;
10141
10142 /* Fill in the .plt on VxWorks. */
10143 if (bfd_link_pic (info))
10144 {
10145 bfd_put_32 (output_bfd,
10146 plt_entry[0] | PPC_HA (got_offset),
10147 htab->elf.splt->contents + ent->plt.offset + 0);
10148 bfd_put_32 (output_bfd,
10149 plt_entry[1] | PPC_LO (got_offset),
10150 htab->elf.splt->contents + ent->plt.offset + 4);
10151 }
10152 else
10153 {
10154 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
10155
10156 bfd_put_32 (output_bfd,
10157 plt_entry[0] | PPC_HA (got_loc),
10158 htab->elf.splt->contents + ent->plt.offset + 0);
10159 bfd_put_32 (output_bfd,
10160 plt_entry[1] | PPC_LO (got_loc),
10161 htab->elf.splt->contents + ent->plt.offset + 4);
10162 }
10163
10164 bfd_put_32 (output_bfd, plt_entry[2],
10165 htab->elf.splt->contents + ent->plt.offset + 8);
10166 bfd_put_32 (output_bfd, plt_entry[3],
10167 htab->elf.splt->contents + ent->plt.offset + 12);
10168
10169 /* This instruction is an immediate load. The value loaded is
10170 the byte offset of the R_PPC_JMP_SLOT relocation from the
10171 start of the .rela.plt section. The value is stored in the
10172 low-order 16 bits of the load instruction. */
10173 /* NOTE: It appears that this is now an index rather than a
10174 prescaled offset. */
10175 bfd_put_32 (output_bfd,
10176 plt_entry[4] | reloc_index,
10177 htab->elf.splt->contents + ent->plt.offset + 16);
10178 /* This instruction is a PC-relative branch whose target is
10179 the start of the PLT section. The address of this branch
10180 instruction is 20 bytes beyond the start of this PLT entry.
10181 The address is encoded in bits 6-29, inclusive. The value
10182 stored is right-shifted by two bits, permitting a 26-bit
10183 offset. */
10184 bfd_put_32 (output_bfd,
10185 (plt_entry[5]
10186 | (-(ent->plt.offset + 20) & 0x03fffffc)),
10187 htab->elf.splt->contents + ent->plt.offset + 20);
10188 bfd_put_32 (output_bfd, plt_entry[6],
10189 htab->elf.splt->contents + ent->plt.offset + 24);
10190 bfd_put_32 (output_bfd, plt_entry[7],
10191 htab->elf.splt->contents + ent->plt.offset + 28);
10192
10193 /* Fill in the GOT entry corresponding to this PLT slot with
10194 the address immediately after the "bctr" instruction
10195 in this PLT entry. */
10196 bfd_put_32 (output_bfd, (htab->elf.splt->output_section->vma
10197 + htab->elf.splt->output_offset
10198 + ent->plt.offset + 16),
10199 htab->elf.sgotplt->contents + got_offset);
10200
10201 if (!bfd_link_pic (info))
10202 {
10203 /* Fill in a couple of entries in .rela.plt.unloaded. */
10204 loc = htab->srelplt2->contents
10205 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
10206 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
10207 * sizeof (Elf32_External_Rela));
10208
10209 /* Provide the @ha relocation for the first instruction. */
10210 rela.r_offset = (htab->elf.splt->output_section->vma
10211 + htab->elf.splt->output_offset
10212 + ent->plt.offset + 2);
10213 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10214 R_PPC_ADDR16_HA);
10215 rela.r_addend = got_offset;
10216 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10217 loc += sizeof (Elf32_External_Rela);
10218
10219 /* Provide the @l relocation for the second instruction. */
10220 rela.r_offset = (htab->elf.splt->output_section->vma
10221 + htab->elf.splt->output_offset
10222 + ent->plt.offset + 6);
10223 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
10224 R_PPC_ADDR16_LO);
10225 rela.r_addend = got_offset;
10226 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10227 loc += sizeof (Elf32_External_Rela);
10228
10229 /* Provide a relocation for the GOT entry corresponding to this
10230 PLT slot. Point it at the middle of the .plt entry. */
10231 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10232 + htab->elf.sgotplt->output_offset
10233 + got_offset);
10234 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
10235 R_PPC_ADDR32);
10236 rela.r_addend = ent->plt.offset + 16;
10237 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10238 }
10239
10240 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
10241 In particular, the offset for the relocation is not the
10242 address of the PLT entry for this function, as specified
10243 by the ABI. Instead, the offset is set to the address of
10244 the GOT slot for this function. See EABI 4.4.4.1. */
10245 rela.r_offset = (htab->elf.sgotplt->output_section->vma
10246 + htab->elf.sgotplt->output_offset
10247 + got_offset);
10248
10249 }
10250 else
10251 {
10252 asection *splt = htab->elf.splt;
10253 if (!htab->elf.dynamic_sections_created
10254 || h->dynindx == -1)
10255 splt = htab->elf.iplt;
10256
10257 rela.r_offset = (splt->output_section->vma
10258 + splt->output_offset
10259 + ent->plt.offset);
10260 if (htab->plt_type == PLT_OLD
10261 || !htab->elf.dynamic_sections_created
10262 || h->dynindx == -1)
10263 {
10264 /* We don't need to fill in the .plt. The ppc dynamic
10265 linker will fill it in. */
10266 }
10267 else
10268 {
10269 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
10270 + htab->glink->output_section->vma
10271 + htab->glink->output_offset);
10272 bfd_put_32 (output_bfd, val,
10273 splt->contents + ent->plt.offset);
10274 }
10275 }
10276
10277 /* Fill in the entry in the .rela.plt section. */
10278 rela.r_addend = 0;
10279 if (!htab->elf.dynamic_sections_created
10280 || h->dynindx == -1)
10281 {
10282 BFD_ASSERT (h->type == STT_GNU_IFUNC
10283 && h->def_regular
10284 && (h->root.type == bfd_link_hash_defined
10285 || h->root.type == bfd_link_hash_defweak));
10286 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
10287 rela.r_addend = SYM_VAL (h);
10288 }
10289 else
10290 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
10291
10292 if (!htab->elf.dynamic_sections_created
10293 || h->dynindx == -1)
10294 {
10295 loc = (htab->elf.irelplt->contents
10296 + (htab->elf.irelplt->reloc_count++
10297 * sizeof (Elf32_External_Rela)));
10298 htab->local_ifunc_resolver = 1;
10299 }
10300 else
10301 {
10302 loc = (htab->elf.srelplt->contents
10303 + reloc_index * sizeof (Elf32_External_Rela));
10304 if (h->type == STT_GNU_IFUNC && is_static_defined (h))
10305 htab->maybe_local_ifunc_resolver = 1;
10306 }
10307 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10308
10309 if (!h->def_regular)
10310 {
10311 /* Mark the symbol as undefined, rather than as
10312 defined in the .plt section. Leave the value if
10313 there were any relocations where pointer equality
10314 matters (this is a clue for the dynamic linker, to
10315 make function pointer comparisons work between an
10316 application and shared library), otherwise set it
10317 to zero. */
10318 sym->st_shndx = SHN_UNDEF;
10319 if (!h->pointer_equality_needed)
10320 sym->st_value = 0;
10321 else if (!h->ref_regular_nonweak)
10322 {
10323 /* This breaks function pointer comparisons, but
10324 that is better than breaking tests for a NULL
10325 function pointer. */
10326 sym->st_value = 0;
10327 }
10328 }
10329 else if (h->type == STT_GNU_IFUNC
10330 && !bfd_link_pic (info))
10331 {
10332 /* Set the value of ifunc symbols in a non-pie
10333 executable to the glink entry. This is to avoid
10334 text relocations. We can't do this for ifunc in
10335 allocate_dynrelocs, as we do for normal dynamic
10336 function symbols with plt entries, because we need
10337 to keep the original value around for the ifunc
10338 relocation. */
10339 sym->st_shndx = (_bfd_elf_section_from_bfd_section
10340 (output_bfd, htab->glink->output_section));
10341 sym->st_value = (ent->glink_offset
10342 + htab->glink->output_offset
10343 + htab->glink->output_section->vma);
10344 }
10345 doneone = TRUE;
10346 }
10347
10348 if (htab->plt_type == PLT_NEW
10349 || !htab->elf.dynamic_sections_created
10350 || h->dynindx == -1)
10351 {
10352 unsigned char *p;
10353 asection *splt = htab->elf.splt;
10354 if (!htab->elf.dynamic_sections_created
10355 || h->dynindx == -1)
10356 splt = htab->elf.iplt;
10357
10358 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
10359
10360 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
10361 {
10362 bfd_put_32 (output_bfd, LWZ_11_3, p);
10363 p += 4;
10364 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
10365 p += 4;
10366 bfd_put_32 (output_bfd, MR_0_3, p);
10367 p += 4;
10368 bfd_put_32 (output_bfd, CMPWI_11_0, p);
10369 p += 4;
10370 bfd_put_32 (output_bfd, ADD_3_12_2, p);
10371 p += 4;
10372 bfd_put_32 (output_bfd, BEQLR, p);
10373 p += 4;
10374 bfd_put_32 (output_bfd, MR_3_0, p);
10375 p += 4;
10376 bfd_put_32 (output_bfd, NOP, p);
10377 p += 4;
10378 }
10379
10380 write_glink_stub (ent, splt, p, info);
10381
10382 if (!bfd_link_pic (info))
10383 /* We only need one non-PIC glink stub. */
10384 break;
10385 }
10386 else
10387 break;
10388 }
10389
10390 if (h->needs_copy)
10391 {
10392 asection *s;
10393 Elf_Internal_Rela rela;
10394 bfd_byte *loc;
10395
10396 /* This symbols needs a copy reloc. Set it up. */
10397
10398 #ifdef DEBUG
10399 fprintf (stderr, ", copy");
10400 #endif
10401
10402 BFD_ASSERT (h->dynindx != -1);
10403
10404 if (ppc_elf_hash_entry (h)->has_sda_refs)
10405 s = htab->relsbss;
10406 else if (h->root.u.def.section == htab->elf.sdynrelro)
10407 s = htab->elf.sreldynrelro;
10408 else
10409 s = htab->elf.srelbss;
10410 BFD_ASSERT (s != NULL);
10411
10412 rela.r_offset = SYM_VAL (h);
10413 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
10414 rela.r_addend = 0;
10415 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
10416 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10417 }
10418
10419 #ifdef DEBUG
10420 fprintf (stderr, "\n");
10421 #endif
10422
10423 return TRUE;
10424 }
10425 \f
10426 static enum elf_reloc_type_class
10427 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
10428 const asection *rel_sec,
10429 const Elf_Internal_Rela *rela)
10430 {
10431 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
10432
10433 if (rel_sec == htab->elf.irelplt)
10434 return reloc_class_ifunc;
10435
10436 switch (ELF32_R_TYPE (rela->r_info))
10437 {
10438 case R_PPC_RELATIVE:
10439 return reloc_class_relative;
10440 case R_PPC_JMP_SLOT:
10441 return reloc_class_plt;
10442 case R_PPC_COPY:
10443 return reloc_class_copy;
10444 default:
10445 return reloc_class_normal;
10446 }
10447 }
10448 \f
10449 /* Finish up the dynamic sections. */
10450
10451 static bfd_boolean
10452 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
10453 struct bfd_link_info *info)
10454 {
10455 asection *sdyn;
10456 struct ppc_elf_link_hash_table *htab;
10457 bfd_vma got;
10458 bfd *dynobj;
10459 bfd_boolean ret = TRUE;
10460
10461 #ifdef DEBUG
10462 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
10463 #endif
10464
10465 htab = ppc_elf_hash_table (info);
10466 dynobj = htab->elf.dynobj;
10467 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
10468
10469 got = 0;
10470 if (htab->elf.hgot != NULL)
10471 got = SYM_VAL (htab->elf.hgot);
10472
10473 if (htab->elf.dynamic_sections_created)
10474 {
10475 Elf32_External_Dyn *dyncon, *dynconend;
10476
10477 BFD_ASSERT (htab->elf.splt != NULL && sdyn != NULL);
10478
10479 dyncon = (Elf32_External_Dyn *) sdyn->contents;
10480 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
10481 for (; dyncon < dynconend; dyncon++)
10482 {
10483 Elf_Internal_Dyn dyn;
10484 asection *s;
10485
10486 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
10487
10488 switch (dyn.d_tag)
10489 {
10490 case DT_PLTGOT:
10491 if (htab->is_vxworks)
10492 s = htab->elf.sgotplt;
10493 else
10494 s = htab->elf.splt;
10495 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10496 break;
10497
10498 case DT_PLTRELSZ:
10499 dyn.d_un.d_val = htab->elf.srelplt->size;
10500 break;
10501
10502 case DT_JMPREL:
10503 s = htab->elf.srelplt;
10504 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
10505 break;
10506
10507 case DT_PPC_GOT:
10508 dyn.d_un.d_ptr = got;
10509 break;
10510
10511 case DT_TEXTREL:
10512 if (htab->local_ifunc_resolver)
10513 info->callbacks->einfo
10514 (_("%X%P: text relocations and GNU indirect "
10515 "functions will result in a segfault at runtime\n"));
10516 else if (htab->maybe_local_ifunc_resolver)
10517 info->callbacks->einfo
10518 (_("%P: warning: text relocations and GNU indirect "
10519 "functions may result in a segfault at runtime\n"));
10520 continue;
10521
10522 default:
10523 if (htab->is_vxworks
10524 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
10525 break;
10526 continue;
10527 }
10528
10529 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
10530 }
10531 }
10532
10533 if (htab->elf.sgot != NULL
10534 && htab->elf.sgot->output_section != bfd_abs_section_ptr)
10535 {
10536 if (htab->elf.hgot->root.u.def.section == htab->elf.sgot
10537 || htab->elf.hgot->root.u.def.section == htab->elf.sgotplt)
10538 {
10539 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
10540
10541 p += htab->elf.hgot->root.u.def.value;
10542 if (htab->plt_type == PLT_OLD)
10543 {
10544 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
10545 so that a function can easily find the address of
10546 _GLOBAL_OFFSET_TABLE_. */
10547 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
10548 < htab->elf.hgot->root.u.def.section->size);
10549 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
10550 }
10551
10552 if (sdyn != NULL)
10553 {
10554 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
10555 BFD_ASSERT (htab->elf.hgot->root.u.def.value
10556 < htab->elf.hgot->root.u.def.section->size);
10557 bfd_put_32 (output_bfd, val, p);
10558 }
10559 }
10560 else
10561 {
10562 /* xgettext:c-format */
10563 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
10564 htab->elf.hgot->root.root.string,
10565 (htab->elf.sgotplt != NULL
10566 ? htab->elf.sgotplt->name
10567 : htab->elf.sgot->name));
10568 bfd_set_error (bfd_error_bad_value);
10569 ret = FALSE;
10570 }
10571
10572 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
10573 }
10574
10575 /* Fill in the first entry in the VxWorks procedure linkage table. */
10576 if (htab->is_vxworks
10577 && htab->elf.splt != NULL
10578 && htab->elf.splt->size != 0
10579 && htab->elf.splt->output_section != bfd_abs_section_ptr)
10580 {
10581 asection *splt = htab->elf.splt;
10582 /* Use the right PLT. */
10583 const bfd_vma *plt_entry = (bfd_link_pic (info)
10584 ? ppc_elf_vxworks_pic_plt0_entry
10585 : ppc_elf_vxworks_plt0_entry);
10586
10587 if (!bfd_link_pic (info))
10588 {
10589 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
10590
10591 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
10592 splt->contents + 0);
10593 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
10594 splt->contents + 4);
10595 }
10596 else
10597 {
10598 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
10599 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
10600 }
10601 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
10602 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
10603 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
10604 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
10605 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
10606 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
10607
10608 if (! bfd_link_pic (info))
10609 {
10610 Elf_Internal_Rela rela;
10611 bfd_byte *loc;
10612
10613 loc = htab->srelplt2->contents;
10614
10615 /* Output the @ha relocation for the first instruction. */
10616 rela.r_offset = (htab->elf.splt->output_section->vma
10617 + htab->elf.splt->output_offset
10618 + 2);
10619 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10620 rela.r_addend = 0;
10621 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10622 loc += sizeof (Elf32_External_Rela);
10623
10624 /* Output the @l relocation for the second instruction. */
10625 rela.r_offset = (htab->elf.splt->output_section->vma
10626 + htab->elf.splt->output_offset
10627 + 6);
10628 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10629 rela.r_addend = 0;
10630 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
10631 loc += sizeof (Elf32_External_Rela);
10632
10633 /* Fix up the remaining relocations. They may have the wrong
10634 symbol index for _G_O_T_ or _P_L_T_ depending on the order
10635 in which symbols were output. */
10636 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
10637 {
10638 Elf_Internal_Rela rel;
10639
10640 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10641 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
10642 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10643 loc += sizeof (Elf32_External_Rela);
10644
10645 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10646 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
10647 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10648 loc += sizeof (Elf32_External_Rela);
10649
10650 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
10651 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
10652 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
10653 loc += sizeof (Elf32_External_Rela);
10654 }
10655 }
10656 }
10657
10658 if (htab->glink != NULL
10659 && htab->glink->contents != NULL
10660 && htab->elf.dynamic_sections_created)
10661 {
10662 unsigned char *p;
10663 unsigned char *endp;
10664 bfd_vma res0;
10665 unsigned int i;
10666
10667 /*
10668 * PIC glink code is the following:
10669 *
10670 * # ith PLT code stub.
10671 * addis 11,30,(plt+(i-1)*4-got)@ha
10672 * lwz 11,(plt+(i-1)*4-got)@l(11)
10673 * mtctr 11
10674 * bctr
10675 *
10676 * # A table of branches, one for each plt entry.
10677 * # The idea is that the plt call stub loads ctr and r11 with these
10678 * # addresses, so (r11 - res_0) gives the plt index * 4.
10679 * res_0: b PLTresolve
10680 * res_1: b PLTresolve
10681 * .
10682 * # Some number of entries towards the end can be nops
10683 * res_n_m3: nop
10684 * res_n_m2: nop
10685 * res_n_m1:
10686 *
10687 * PLTresolve:
10688 * addis 11,11,(1f-res_0)@ha
10689 * mflr 0
10690 * bcl 20,31,1f
10691 * 1: addi 11,11,(1b-res_0)@l
10692 * mflr 12
10693 * mtlr 0
10694 * sub 11,11,12 # r11 = index * 4
10695 * addis 12,12,(got+4-1b)@ha
10696 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
10697 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
10698 * mtctr 0
10699 * add 0,11,11
10700 * add 11,0,11 # r11 = index * 12 = reloc offset.
10701 * bctr
10702 */
10703 static const unsigned int pic_plt_resolve[] =
10704 {
10705 ADDIS_11_11,
10706 MFLR_0,
10707 BCL_20_31,
10708 ADDI_11_11,
10709 MFLR_12,
10710 MTLR_0,
10711 SUB_11_11_12,
10712 ADDIS_12_12,
10713 LWZ_0_12,
10714 LWZ_12_12,
10715 MTCTR_0,
10716 ADD_0_11_11,
10717 ADD_11_0_11,
10718 BCTR,
10719 NOP,
10720 NOP
10721 };
10722
10723 /*
10724 * Non-PIC glink code is a little simpler.
10725 *
10726 * # ith PLT code stub.
10727 * lis 11,(plt+(i-1)*4)@ha
10728 * lwz 11,(plt+(i-1)*4)@l(11)
10729 * mtctr 11
10730 * bctr
10731 *
10732 * The branch table is the same, then comes
10733 *
10734 * PLTresolve:
10735 * lis 12,(got+4)@ha
10736 * addis 11,11,(-res_0)@ha
10737 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
10738 * addi 11,11,(-res_0)@l # r11 = index * 4
10739 * mtctr 0
10740 * add 0,11,11
10741 * lwz 12,(got+8)@l(12) # got[2] contains the map address
10742 * add 11,0,11 # r11 = index * 12 = reloc offset.
10743 * bctr
10744 */
10745 static const unsigned int plt_resolve[] =
10746 {
10747 LIS_12,
10748 ADDIS_11_11,
10749 LWZ_0_12,
10750 ADDI_11_11,
10751 MTCTR_0,
10752 ADD_0_11_11,
10753 LWZ_12_12,
10754 ADD_11_0_11,
10755 BCTR,
10756 NOP,
10757 NOP,
10758 NOP,
10759 NOP,
10760 NOP,
10761 NOP,
10762 NOP
10763 };
10764
10765 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
10766 abort ();
10767 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
10768 abort ();
10769
10770 /* Build the branch table, one for each plt entry (less one),
10771 and perhaps some padding. */
10772 p = htab->glink->contents;
10773 p += htab->glink_pltresolve;
10774 endp = htab->glink->contents;
10775 endp += htab->glink->size - GLINK_PLTRESOLVE;
10776 while (p < endp - (htab->params->ppc476_workaround ? 0 : 8 * 4))
10777 {
10778 bfd_put_32 (output_bfd, B + endp - p, p);
10779 p += 4;
10780 }
10781 while (p < endp)
10782 {
10783 bfd_put_32 (output_bfd, NOP, p);
10784 p += 4;
10785 }
10786
10787 res0 = (htab->glink_pltresolve
10788 + htab->glink->output_section->vma
10789 + htab->glink->output_offset);
10790
10791 if (htab->params->ppc476_workaround)
10792 {
10793 /* Ensure that a call stub at the end of a page doesn't
10794 result in prefetch over the end of the page into the
10795 glink branch table. */
10796 bfd_vma pagesize = (bfd_vma) 1 << htab->params->pagesize_p2;
10797 bfd_vma page_addr;
10798 bfd_vma glink_start = (htab->glink->output_section->vma
10799 + htab->glink->output_offset);
10800
10801 for (page_addr = res0 & -pagesize;
10802 page_addr > glink_start;
10803 page_addr -= pagesize)
10804 {
10805 /* We have a plt call stub that may need fixing. */
10806 bfd_byte *loc;
10807 unsigned int insn;
10808
10809 loc = htab->glink->contents + page_addr - 4 - glink_start;
10810 insn = bfd_get_32 (output_bfd, loc);
10811 if (insn == BCTR)
10812 {
10813 /* By alignment, we know that there must be at least
10814 one other call stub before this one. */
10815 insn = bfd_get_32 (output_bfd, loc - 16);
10816 if (insn == BCTR)
10817 bfd_put_32 (output_bfd, B | (-16 & 0x3fffffc), loc);
10818 else
10819 bfd_put_32 (output_bfd, B | (-20 & 0x3fffffc), loc);
10820 }
10821 }
10822 }
10823
10824 /* Last comes the PLTresolve stub. */
10825 if (bfd_link_pic (info))
10826 {
10827 bfd_vma bcl;
10828
10829 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10830 {
10831 unsigned int insn = pic_plt_resolve[i];
10832
10833 if (htab->params->ppc476_workaround && insn == NOP)
10834 insn = BA + 0;
10835 bfd_put_32 (output_bfd, insn, p);
10836 p += 4;
10837 }
10838 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10839
10840 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10841 + htab->glink->output_section->vma
10842 + htab->glink->output_offset);
10843
10844 bfd_put_32 (output_bfd,
10845 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10846 bfd_put_32 (output_bfd,
10847 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10848 bfd_put_32 (output_bfd,
10849 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10850 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10851 {
10852 bfd_put_32 (output_bfd,
10853 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10854 bfd_put_32 (output_bfd,
10855 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10856 }
10857 else
10858 {
10859 bfd_put_32 (output_bfd,
10860 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10861 bfd_put_32 (output_bfd,
10862 LWZ_12_12 + 4, p + 9*4);
10863 }
10864 }
10865 else
10866 {
10867 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10868 {
10869 unsigned int insn = plt_resolve[i];
10870
10871 if (htab->params->ppc476_workaround && insn == NOP)
10872 insn = BA + 0;
10873 bfd_put_32 (output_bfd, insn, p);
10874 p += 4;
10875 }
10876 p -= 4 * ARRAY_SIZE (plt_resolve);
10877
10878 bfd_put_32 (output_bfd,
10879 LIS_12 + PPC_HA (got + 4), p + 0*4);
10880 bfd_put_32 (output_bfd,
10881 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10882 bfd_put_32 (output_bfd,
10883 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10884 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10885 {
10886 bfd_put_32 (output_bfd,
10887 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10888 bfd_put_32 (output_bfd,
10889 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10890 }
10891 else
10892 {
10893 bfd_put_32 (output_bfd,
10894 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10895 bfd_put_32 (output_bfd,
10896 LWZ_12_12 + 4, p + 6*4);
10897 }
10898 }
10899 }
10900
10901 if (htab->glink_eh_frame != NULL
10902 && htab->glink_eh_frame->contents != NULL)
10903 {
10904 unsigned char *p = htab->glink_eh_frame->contents;
10905 bfd_vma val;
10906
10907 p += sizeof (glink_eh_frame_cie);
10908 /* FDE length. */
10909 p += 4;
10910 /* CIE pointer. */
10911 p += 4;
10912 /* Offset to .glink. */
10913 val = (htab->glink->output_section->vma
10914 + htab->glink->output_offset);
10915 val -= (htab->glink_eh_frame->output_section->vma
10916 + htab->glink_eh_frame->output_offset);
10917 val -= p - htab->glink_eh_frame->contents;
10918 bfd_put_32 (htab->elf.dynobj, val, p);
10919
10920 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10921 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10922 htab->glink_eh_frame,
10923 htab->glink_eh_frame->contents))
10924 return FALSE;
10925 }
10926
10927 return ret;
10928 }
10929 \f
10930 #define TARGET_LITTLE_SYM powerpc_elf32_le_vec
10931 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10932 #define TARGET_BIG_SYM powerpc_elf32_vec
10933 #define TARGET_BIG_NAME "elf32-powerpc"
10934 #define ELF_ARCH bfd_arch_powerpc
10935 #define ELF_TARGET_ID PPC32_ELF_DATA
10936 #define ELF_MACHINE_CODE EM_PPC
10937 #ifdef __QNXTARGET__
10938 #define ELF_MAXPAGESIZE 0x1000
10939 #define ELF_COMMONPAGESIZE 0x1000
10940 #else
10941 #define ELF_MAXPAGESIZE 0x10000
10942 #define ELF_COMMONPAGESIZE 0x10000
10943 #endif
10944 #define ELF_MINPAGESIZE 0x1000
10945 #define elf_info_to_howto ppc_elf_info_to_howto
10946
10947 #ifdef EM_CYGNUS_POWERPC
10948 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10949 #endif
10950
10951 #ifdef EM_PPC_OLD
10952 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10953 #endif
10954
10955 #define elf_backend_plt_not_loaded 1
10956 #define elf_backend_want_dynrelro 1
10957 #define elf_backend_can_gc_sections 1
10958 #define elf_backend_can_refcount 1
10959 #define elf_backend_rela_normal 1
10960 #define elf_backend_caches_rawsize 1
10961
10962 #define bfd_elf32_mkobject ppc_elf_mkobject
10963 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10964 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10965 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10966 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10967 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10968 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10969 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10970
10971 #define elf_backend_object_p ppc_elf_object_p
10972 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10973 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10974 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10975 #define elf_backend_relocate_section ppc_elf_relocate_section
10976 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10977 #define elf_backend_check_relocs ppc_elf_check_relocs
10978 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10979 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10980 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10981 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10982 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10983 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10984 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10985 #define elf_backend_fake_sections ppc_elf_fake_sections
10986 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10987 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10988 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10989 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10990 #define elf_backend_write_core_note ppc_elf_write_core_note
10991 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10992 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10993 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10994 #define elf_backend_write_section ppc_elf_write_section
10995 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10996 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10997 #define elf_backend_action_discarded ppc_elf_action_discarded
10998 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10999 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
11000
11001 #include "elf32-target.h"
11002
11003 /* FreeBSD Target */
11004
11005 #undef TARGET_LITTLE_SYM
11006 #undef TARGET_LITTLE_NAME
11007
11008 #undef TARGET_BIG_SYM
11009 #define TARGET_BIG_SYM powerpc_elf32_fbsd_vec
11010 #undef TARGET_BIG_NAME
11011 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
11012
11013 #undef ELF_OSABI
11014 #define ELF_OSABI ELFOSABI_FREEBSD
11015
11016 #undef elf32_bed
11017 #define elf32_bed elf32_powerpc_fbsd_bed
11018
11019 #include "elf32-target.h"
11020
11021 /* VxWorks Target */
11022
11023 #undef TARGET_LITTLE_SYM
11024 #undef TARGET_LITTLE_NAME
11025
11026 #undef TARGET_BIG_SYM
11027 #define TARGET_BIG_SYM powerpc_elf32_vxworks_vec
11028 #undef TARGET_BIG_NAME
11029 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
11030
11031 #undef ELF_OSABI
11032
11033 /* VxWorks uses the elf default section flags for .plt. */
11034 static const struct bfd_elf_special_section *
11035 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd, asection *sec)
11036 {
11037 if (sec->name == NULL)
11038 return NULL;
11039
11040 if (strcmp (sec->name, ".plt") == 0)
11041 return _bfd_elf_get_sec_type_attr (abfd, sec);
11042
11043 return ppc_elf_get_sec_type_attr (abfd, sec);
11044 }
11045
11046 /* Like ppc_elf_link_hash_table_create, but overrides
11047 appropriately for VxWorks. */
11048 static struct bfd_link_hash_table *
11049 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
11050 {
11051 struct bfd_link_hash_table *ret;
11052
11053 ret = ppc_elf_link_hash_table_create (abfd);
11054 if (ret)
11055 {
11056 struct ppc_elf_link_hash_table *htab
11057 = (struct ppc_elf_link_hash_table *)ret;
11058 htab->is_vxworks = 1;
11059 htab->plt_type = PLT_VXWORKS;
11060 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
11061 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
11062 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
11063 }
11064 return ret;
11065 }
11066
11067 /* Tweak magic VxWorks symbols as they are loaded. */
11068 static bfd_boolean
11069 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
11070 struct bfd_link_info *info,
11071 Elf_Internal_Sym *sym,
11072 const char **namep,
11073 flagword *flagsp,
11074 asection **secp,
11075 bfd_vma *valp)
11076 {
11077 if (!elf_vxworks_add_symbol_hook (abfd, info, sym, namep, flagsp, secp,
11078 valp))
11079 return FALSE;
11080
11081 return ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp);
11082 }
11083
11084 static void
11085 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
11086 {
11087 ppc_elf_final_write_processing (abfd, linker);
11088 elf_vxworks_final_write_processing (abfd, linker);
11089 }
11090
11091 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
11092 define it. */
11093 #undef elf_backend_want_plt_sym
11094 #define elf_backend_want_plt_sym 1
11095 #undef elf_backend_want_got_plt
11096 #define elf_backend_want_got_plt 1
11097 #undef elf_backend_got_symbol_offset
11098 #define elf_backend_got_symbol_offset 0
11099 #undef elf_backend_plt_not_loaded
11100 #define elf_backend_plt_not_loaded 0
11101 #undef elf_backend_plt_readonly
11102 #define elf_backend_plt_readonly 1
11103 #undef elf_backend_got_header_size
11104 #define elf_backend_got_header_size 12
11105 #undef elf_backend_dtrel_excludes_plt
11106 #define elf_backend_dtrel_excludes_plt 1
11107
11108 #undef bfd_elf32_get_synthetic_symtab
11109
11110 #undef bfd_elf32_bfd_link_hash_table_create
11111 #define bfd_elf32_bfd_link_hash_table_create \
11112 ppc_elf_vxworks_link_hash_table_create
11113 #undef elf_backend_add_symbol_hook
11114 #define elf_backend_add_symbol_hook \
11115 ppc_elf_vxworks_add_symbol_hook
11116 #undef elf_backend_link_output_symbol_hook
11117 #define elf_backend_link_output_symbol_hook \
11118 elf_vxworks_link_output_symbol_hook
11119 #undef elf_backend_final_write_processing
11120 #define elf_backend_final_write_processing \
11121 ppc_elf_vxworks_final_write_processing
11122 #undef elf_backend_get_sec_type_attr
11123 #define elf_backend_get_sec_type_attr \
11124 ppc_elf_vxworks_get_sec_type_attr
11125 #undef elf_backend_emit_relocs
11126 #define elf_backend_emit_relocs \
11127 elf_vxworks_emit_relocs
11128
11129 #undef elf32_bed
11130 #define elf32_bed ppc_elf_vxworks_bed
11131 #undef elf_backend_post_process_headers
11132
11133 #include "elf32-target.h"
GDB Binutils - Deliverables
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