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* elf-bfd.h (enum elf_reloc_type_class): Add reloc_class_ifunc.
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Written by Ian Lance Taylor, Cygnus Support.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the
21 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
22 Boston, MA 02110-1301, USA. */
23
24
25 /* This file is based on a preliminary PowerPC ELF ABI. The
26 information may not match the final PowerPC ELF ABI. It includes
27 suggestions from the in-progress Embedded PowerPC ABI, and that
28 information may also not match. */
29
30 #include "sysdep.h"
31 #include <stdarg.h>
32 #include "bfd.h"
33 #include "bfdlink.h"
34 #include "libbfd.h"
35 #include "elf-bfd.h"
36 #include "elf/ppc.h"
37 #include "elf32-ppc.h"
38 #include "elf-vxworks.h"
39 #include "dwarf2.h"
40 #include "elf-linux-psinfo.h"
41
42 typedef enum split16_format_type
43 {
44 split16a_type = 0,
45 split16d_type
46 }
47 split16_format_type;
48
49 /* RELA relocations are used here. */
50
51 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc_elf_unhandled_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static void ppc_elf_vle_split16
56 (bfd *, bfd_byte *, bfd_vma, bfd_vma, split16_format_type);
57
58 /* Branch prediction bit for branch taken relocs. */
59 #define BRANCH_PREDICT_BIT 0x200000
60 /* Mask to set RA in memory instructions. */
61 #define RA_REGISTER_MASK 0x001f0000
62 /* Value to shift register by to insert RA. */
63 #define RA_REGISTER_SHIFT 16
64
65 /* The name of the dynamic interpreter. This is put in the .interp
66 section. */
67 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
68
69 /* For old-style PLT. */
70 /* The number of single-slot PLT entries (the rest use two slots). */
71 #define PLT_NUM_SINGLE_ENTRIES 8192
72
73 /* For new-style .glink and .plt. */
74 #define GLINK_PLTRESOLVE 16*4
75 #define GLINK_ENTRY_SIZE 4*4
76 #define TLS_GET_ADDR_GLINK_SIZE 12*4
77
78 /* VxWorks uses its own plt layout, filled in by the static linker. */
79
80 /* The standard VxWorks PLT entry. */
81 #define VXWORKS_PLT_ENTRY_SIZE 32
82 static const bfd_vma ppc_elf_vxworks_plt_entry
83 [VXWORKS_PLT_ENTRY_SIZE / 4] =
84 {
85 0x3d800000, /* lis r12,0 */
86 0x818c0000, /* lwz r12,0(r12) */
87 0x7d8903a6, /* mtctr r12 */
88 0x4e800420, /* bctr */
89 0x39600000, /* li r11,0 */
90 0x48000000, /* b 14 <.PLT0resolve+0x4> */
91 0x60000000, /* nop */
92 0x60000000, /* nop */
93 };
94 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
95 [VXWORKS_PLT_ENTRY_SIZE / 4] =
96 {
97 0x3d9e0000, /* addis r12,r30,0 */
98 0x818c0000, /* lwz r12,0(r12) */
99 0x7d8903a6, /* mtctr r12 */
100 0x4e800420, /* bctr */
101 0x39600000, /* li r11,0 */
102 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106
107 /* The initial VxWorks PLT entry. */
108 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
109 static const bfd_vma ppc_elf_vxworks_plt0_entry
110 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
111 {
112 0x3d800000, /* lis r12,0 */
113 0x398c0000, /* addi r12,r12,0 */
114 0x800c0008, /* lwz r0,8(r12) */
115 0x7c0903a6, /* mtctr r0 */
116 0x818c0004, /* lwz r12,4(r12) */
117 0x4e800420, /* bctr */
118 0x60000000, /* nop */
119 0x60000000, /* nop */
120 };
121 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
122 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
123 {
124 0x819e0008, /* lwz r12,8(r30) */
125 0x7d8903a6, /* mtctr r12 */
126 0x819e0004, /* lwz r12,4(r30) */
127 0x4e800420, /* bctr */
128 0x60000000, /* nop */
129 0x60000000, /* nop */
130 0x60000000, /* nop */
131 0x60000000, /* nop */
132 };
133
134 /* For executables, we have some additional relocations in
135 .rela.plt.unloaded, for the kernel loader. */
136
137 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
138 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
139 /* The number of relocations in the PLTResolve slot. */
140 #define VXWORKS_PLTRESOLVE_RELOCS 2
141 /* The number of relocations in the PLTResolve slot when when creating
142 a shared library. */
143 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
144
145 /* Some instructions. */
146 #define ADDIS_11_11 0x3d6b0000
147 #define ADDIS_11_30 0x3d7e0000
148 #define ADDIS_12_12 0x3d8c0000
149 #define ADDI_11_11 0x396b0000
150 #define ADD_0_11_11 0x7c0b5a14
151 #define ADD_3_12_2 0x7c6c1214
152 #define ADD_11_0_11 0x7d605a14
153 #define B 0x48000000
154 #define BCL_20_31 0x429f0005
155 #define BCTR 0x4e800420
156 #define BEQLR 0x4d820020
157 #define CMPWI_11_0 0x2c0b0000
158 #define LIS_11 0x3d600000
159 #define LIS_12 0x3d800000
160 #define LWZU_0_12 0x840c0000
161 #define LWZ_0_12 0x800c0000
162 #define LWZ_11_3 0x81630000
163 #define LWZ_11_11 0x816b0000
164 #define LWZ_11_30 0x817e0000
165 #define LWZ_12_3 0x81830000
166 #define LWZ_12_12 0x818c0000
167 #define MR_0_3 0x7c601b78
168 #define MR_3_0 0x7c030378
169 #define MFLR_0 0x7c0802a6
170 #define MFLR_12 0x7d8802a6
171 #define MTCTR_0 0x7c0903a6
172 #define MTCTR_11 0x7d6903a6
173 #define MTLR_0 0x7c0803a6
174 #define NOP 0x60000000
175 #define SUB_11_11_12 0x7d6c5850
176
177 /* Offset of tp and dtp pointers from start of TLS block. */
178 #define TP_OFFSET 0x7000
179 #define DTP_OFFSET 0x8000
180
181 /* The value of a defined global symbol. */
182 #define SYM_VAL(SYM) \
183 ((SYM)->root.u.def.section->output_section->vma \
184 + (SYM)->root.u.def.section->output_offset \
185 + (SYM)->root.u.def.value)
186 \f
187 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
188
189 static reloc_howto_type ppc_elf_howto_raw[] = {
190 /* This reloc does nothing. */
191 HOWTO (R_PPC_NONE, /* type */
192 0, /* rightshift */
193 2, /* size (0 = byte, 1 = short, 2 = long) */
194 32, /* bitsize */
195 FALSE, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_bitfield, /* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_PPC_NONE", /* name */
200 FALSE, /* partial_inplace */
201 0, /* src_mask */
202 0, /* dst_mask */
203 FALSE), /* pcrel_offset */
204
205 /* A standard 32 bit relocation. */
206 HOWTO (R_PPC_ADDR32, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_bitfield, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_PPC_ADDR32", /* name */
215 FALSE, /* partial_inplace */
216 0, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* An absolute 26 bit branch; the lower two bits must be zero.
221 FIXME: we don't check that, we just clear them. */
222 HOWTO (R_PPC_ADDR24, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 26, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_bitfield, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC_ADDR24", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0x3fffffc, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 16 bit relocation. */
237 HOWTO (R_PPC_ADDR16, /* type */
238 0, /* rightshift */
239 1, /* size (0 = byte, 1 = short, 2 = long) */
240 16, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC_ADDR16", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* A 16 bit relocation without overflow. */
252 HOWTO (R_PPC_ADDR16_LO, /* type */
253 0, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_dont,/* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC_ADDR16_LO", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0xffff, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* The high order 16 bits of an address. */
267 HOWTO (R_PPC_ADDR16_HI, /* type */
268 16, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC_ADDR16_HI", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* The high order 16 bits of an address, plus 1 if the contents of
282 the low 16 bits, treated as a signed number, is negative. */
283 HOWTO (R_PPC_ADDR16_HA, /* type */
284 16, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont, /* complain_on_overflow */
290 ppc_elf_addr16_ha_reloc, /* special_function */
291 "R_PPC_ADDR16_HA", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* An absolute 16 bit branch; the lower two bits must be zero.
298 FIXME: we don't check that, we just clear them. */
299 HOWTO (R_PPC_ADDR14, /* type */
300 0, /* rightshift */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
302 16, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_bitfield, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_PPC_ADDR14", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0xfffc, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 /* An absolute 16 bit branch, for which bit 10 should be set to
314 indicate that the branch is expected to be taken. The lower two
315 bits must be zero. */
316 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 0, /* bitpos */
322 complain_overflow_bitfield, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_PPC_ADDR14_BRTAKEN",/* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0xfffc, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* An absolute 16 bit branch, for which bit 10 should be set to
331 indicate that the branch is not expected to be taken. The lower
332 two bits must be zero. */
333 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 16, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* special_function */
341 "R_PPC_ADDR14_BRNTAKEN",/* name */
342 FALSE, /* partial_inplace */
343 0, /* src_mask */
344 0xfffc, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 /* A relative 26 bit branch; the lower two bits must be zero. */
348 HOWTO (R_PPC_REL24, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 26, /* bitsize */
352 TRUE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_signed, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_PPC_REL24", /* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0x3fffffc, /* dst_mask */
360 TRUE), /* pcrel_offset */
361
362 /* A relative 16 bit branch; the lower two bits must be zero. */
363 HOWTO (R_PPC_REL14, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 16, /* bitsize */
367 TRUE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_signed, /* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_PPC_REL14", /* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0xfffc, /* dst_mask */
375 TRUE), /* pcrel_offset */
376
377 /* A relative 16 bit branch. Bit 10 should be set to indicate that
378 the branch is expected to be taken. The lower two bits must be
379 zero. */
380 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
381 0, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 TRUE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_signed, /* complain_on_overflow */
387 bfd_elf_generic_reloc, /* special_function */
388 "R_PPC_REL14_BRTAKEN", /* name */
389 FALSE, /* partial_inplace */
390 0, /* src_mask */
391 0xfffc, /* dst_mask */
392 TRUE), /* pcrel_offset */
393
394 /* A relative 16 bit branch. Bit 10 should be set to indicate that
395 the branch is not expected to be taken. The lower two bits must
396 be zero. */
397 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
398 0, /* rightshift */
399 2, /* size (0 = byte, 1 = short, 2 = long) */
400 16, /* bitsize */
401 TRUE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_signed, /* complain_on_overflow */
404 bfd_elf_generic_reloc, /* special_function */
405 "R_PPC_REL14_BRNTAKEN",/* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0xfffc, /* dst_mask */
409 TRUE), /* pcrel_offset */
410
411 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
412 symbol. */
413 HOWTO (R_PPC_GOT16, /* type */
414 0, /* rightshift */
415 1, /* size (0 = byte, 1 = short, 2 = long) */
416 16, /* bitsize */
417 FALSE, /* pc_relative */
418 0, /* bitpos */
419 complain_overflow_signed, /* complain_on_overflow */
420 bfd_elf_generic_reloc, /* special_function */
421 "R_PPC_GOT16", /* name */
422 FALSE, /* partial_inplace */
423 0, /* src_mask */
424 0xffff, /* dst_mask */
425 FALSE), /* pcrel_offset */
426
427 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
428 the symbol. */
429 HOWTO (R_PPC_GOT16_LO, /* type */
430 0, /* rightshift */
431 1, /* size (0 = byte, 1 = short, 2 = long) */
432 16, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
435 complain_overflow_dont, /* complain_on_overflow */
436 bfd_elf_generic_reloc, /* special_function */
437 "R_PPC_GOT16_LO", /* name */
438 FALSE, /* partial_inplace */
439 0, /* src_mask */
440 0xffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
442
443 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
444 the symbol. */
445 HOWTO (R_PPC_GOT16_HI, /* type */
446 16, /* rightshift */
447 1, /* size (0 = byte, 1 = short, 2 = long) */
448 16, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_bitfield, /* complain_on_overflow */
452 bfd_elf_generic_reloc, /* special_function */
453 "R_PPC_GOT16_HI", /* name */
454 FALSE, /* partial_inplace */
455 0, /* src_mask */
456 0xffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
460 the symbol. */
461 HOWTO (R_PPC_GOT16_HA, /* type */
462 16, /* rightshift */
463 1, /* size (0 = byte, 1 = short, 2 = long) */
464 16, /* bitsize */
465 FALSE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_bitfield, /* complain_on_overflow */
468 ppc_elf_addr16_ha_reloc, /* special_function */
469 "R_PPC_GOT16_HA", /* name */
470 FALSE, /* partial_inplace */
471 0, /* src_mask */
472 0xffff, /* dst_mask */
473 FALSE), /* pcrel_offset */
474
475 /* Like R_PPC_REL24, but referring to the procedure linkage table
476 entry for the symbol. */
477 HOWTO (R_PPC_PLTREL24, /* type */
478 0, /* rightshift */
479 2, /* size (0 = byte, 1 = short, 2 = long) */
480 26, /* bitsize */
481 TRUE, /* pc_relative */
482 0, /* bitpos */
483 complain_overflow_signed, /* complain_on_overflow */
484 bfd_elf_generic_reloc, /* special_function */
485 "R_PPC_PLTREL24", /* name */
486 FALSE, /* partial_inplace */
487 0, /* src_mask */
488 0x3fffffc, /* dst_mask */
489 TRUE), /* pcrel_offset */
490
491 /* This is used only by the dynamic linker. The symbol should exist
492 both in the object being run and in some shared library. The
493 dynamic linker copies the data addressed by the symbol from the
494 shared library into the object, because the object being
495 run has to have the data at some particular address. */
496 HOWTO (R_PPC_COPY, /* type */
497 0, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 32, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_PPC_COPY", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC_ADDR32, but used when setting global offset table
511 entries. */
512 HOWTO (R_PPC_GLOB_DAT, /* type */
513 0, /* rightshift */
514 2, /* size (0 = byte, 1 = short, 2 = long) */
515 32, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_bitfield, /* complain_on_overflow */
519 bfd_elf_generic_reloc, /* special_function */
520 "R_PPC_GLOB_DAT", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffffffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Marks a procedure linkage table entry for a symbol. */
527 HOWTO (R_PPC_JMP_SLOT, /* type */
528 0, /* rightshift */
529 2, /* size (0 = byte, 1 = short, 2 = long) */
530 32, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_bitfield, /* complain_on_overflow */
534 bfd_elf_generic_reloc, /* special_function */
535 "R_PPC_JMP_SLOT", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 0, /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Used only by the dynamic linker. When the object is run, this
542 longword is set to the load address of the object, plus the
543 addend. */
544 HOWTO (R_PPC_RELATIVE, /* type */
545 0, /* rightshift */
546 2, /* size (0 = byte, 1 = short, 2 = long) */
547 32, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_bitfield, /* complain_on_overflow */
551 bfd_elf_generic_reloc, /* special_function */
552 "R_PPC_RELATIVE", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffffffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* Like R_PPC_REL24, but uses the value of the symbol within the
559 object rather than the final value. Normally used for
560 _GLOBAL_OFFSET_TABLE_. */
561 HOWTO (R_PPC_LOCAL24PC, /* type */
562 0, /* rightshift */
563 2, /* size (0 = byte, 1 = short, 2 = long) */
564 26, /* bitsize */
565 TRUE, /* pc_relative */
566 0, /* bitpos */
567 complain_overflow_signed, /* complain_on_overflow */
568 bfd_elf_generic_reloc, /* special_function */
569 "R_PPC_LOCAL24PC", /* name */
570 FALSE, /* partial_inplace */
571 0, /* src_mask */
572 0x3fffffc, /* dst_mask */
573 TRUE), /* pcrel_offset */
574
575 /* Like R_PPC_ADDR32, but may be unaligned. */
576 HOWTO (R_PPC_UADDR32, /* type */
577 0, /* rightshift */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
579 32, /* bitsize */
580 FALSE, /* pc_relative */
581 0, /* bitpos */
582 complain_overflow_bitfield, /* complain_on_overflow */
583 bfd_elf_generic_reloc, /* special_function */
584 "R_PPC_UADDR32", /* name */
585 FALSE, /* partial_inplace */
586 0, /* src_mask */
587 0xffffffff, /* dst_mask */
588 FALSE), /* pcrel_offset */
589
590 /* Like R_PPC_ADDR16, but may be unaligned. */
591 HOWTO (R_PPC_UADDR16, /* type */
592 0, /* rightshift */
593 1, /* size (0 = byte, 1 = short, 2 = long) */
594 16, /* bitsize */
595 FALSE, /* pc_relative */
596 0, /* bitpos */
597 complain_overflow_bitfield, /* complain_on_overflow */
598 bfd_elf_generic_reloc, /* special_function */
599 "R_PPC_UADDR16", /* name */
600 FALSE, /* partial_inplace */
601 0, /* src_mask */
602 0xffff, /* dst_mask */
603 FALSE), /* pcrel_offset */
604
605 /* 32-bit PC relative */
606 HOWTO (R_PPC_REL32, /* type */
607 0, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 32, /* bitsize */
610 TRUE, /* pc_relative */
611 0, /* bitpos */
612 complain_overflow_bitfield, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC_REL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* 32-bit relocation to the symbol's procedure linkage table.
621 FIXME: not supported. */
622 HOWTO (R_PPC_PLT32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC_PLT32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
637 FIXME: not supported. */
638 HOWTO (R_PPC_PLTREL32, /* type */
639 0, /* rightshift */
640 2, /* size (0 = byte, 1 = short, 2 = long) */
641 32, /* bitsize */
642 TRUE, /* pc_relative */
643 0, /* bitpos */
644 complain_overflow_bitfield, /* complain_on_overflow */
645 bfd_elf_generic_reloc, /* special_function */
646 "R_PPC_PLTREL32", /* name */
647 FALSE, /* partial_inplace */
648 0, /* src_mask */
649 0, /* dst_mask */
650 TRUE), /* pcrel_offset */
651
652 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
653 the symbol. */
654 HOWTO (R_PPC_PLT16_LO, /* type */
655 0, /* rightshift */
656 1, /* size (0 = byte, 1 = short, 2 = long) */
657 16, /* bitsize */
658 FALSE, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_dont, /* complain_on_overflow */
661 bfd_elf_generic_reloc, /* special_function */
662 "R_PPC_PLT16_LO", /* name */
663 FALSE, /* partial_inplace */
664 0, /* src_mask */
665 0xffff, /* dst_mask */
666 FALSE), /* pcrel_offset */
667
668 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
669 the symbol. */
670 HOWTO (R_PPC_PLT16_HI, /* type */
671 16, /* rightshift */
672 1, /* size (0 = byte, 1 = short, 2 = long) */
673 16, /* bitsize */
674 FALSE, /* pc_relative */
675 0, /* bitpos */
676 complain_overflow_bitfield, /* complain_on_overflow */
677 bfd_elf_generic_reloc, /* special_function */
678 "R_PPC_PLT16_HI", /* name */
679 FALSE, /* partial_inplace */
680 0, /* src_mask */
681 0xffff, /* dst_mask */
682 FALSE), /* pcrel_offset */
683
684 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
685 the symbol. */
686 HOWTO (R_PPC_PLT16_HA, /* type */
687 16, /* rightshift */
688 1, /* size (0 = byte, 1 = short, 2 = long) */
689 16, /* bitsize */
690 FALSE, /* pc_relative */
691 0, /* bitpos */
692 complain_overflow_bitfield, /* complain_on_overflow */
693 ppc_elf_addr16_ha_reloc, /* special_function */
694 "R_PPC_PLT16_HA", /* name */
695 FALSE, /* partial_inplace */
696 0, /* src_mask */
697 0xffff, /* dst_mask */
698 FALSE), /* pcrel_offset */
699
700 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
701 small data items. */
702 HOWTO (R_PPC_SDAREL16, /* type */
703 0, /* rightshift */
704 1, /* size (0 = byte, 1 = short, 2 = long) */
705 16, /* bitsize */
706 FALSE, /* pc_relative */
707 0, /* bitpos */
708 complain_overflow_signed, /* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 "R_PPC_SDAREL16", /* name */
711 FALSE, /* partial_inplace */
712 0, /* src_mask */
713 0xffff, /* dst_mask */
714 FALSE), /* pcrel_offset */
715
716 /* 16-bit section relative relocation. */
717 HOWTO (R_PPC_SECTOFF, /* type */
718 0, /* rightshift */
719 1, /* size (0 = byte, 1 = short, 2 = long) */
720 16, /* bitsize */
721 FALSE, /* pc_relative */
722 0, /* bitpos */
723 complain_overflow_bitfield, /* complain_on_overflow */
724 bfd_elf_generic_reloc, /* special_function */
725 "R_PPC_SECTOFF", /* name */
726 FALSE, /* partial_inplace */
727 0, /* src_mask */
728 0xffff, /* dst_mask */
729 FALSE), /* pcrel_offset */
730
731 /* 16-bit lower half section relative relocation. */
732 HOWTO (R_PPC_SECTOFF_LO, /* type */
733 0, /* rightshift */
734 1, /* size (0 = byte, 1 = short, 2 = long) */
735 16, /* bitsize */
736 FALSE, /* pc_relative */
737 0, /* bitpos */
738 complain_overflow_dont, /* complain_on_overflow */
739 bfd_elf_generic_reloc, /* special_function */
740 "R_PPC_SECTOFF_LO", /* name */
741 FALSE, /* partial_inplace */
742 0, /* src_mask */
743 0xffff, /* dst_mask */
744 FALSE), /* pcrel_offset */
745
746 /* 16-bit upper half section relative relocation. */
747 HOWTO (R_PPC_SECTOFF_HI, /* type */
748 16, /* rightshift */
749 1, /* size (0 = byte, 1 = short, 2 = long) */
750 16, /* bitsize */
751 FALSE, /* pc_relative */
752 0, /* bitpos */
753 complain_overflow_bitfield, /* complain_on_overflow */
754 bfd_elf_generic_reloc, /* special_function */
755 "R_PPC_SECTOFF_HI", /* name */
756 FALSE, /* partial_inplace */
757 0, /* src_mask */
758 0xffff, /* dst_mask */
759 FALSE), /* pcrel_offset */
760
761 /* 16-bit upper half adjusted section relative relocation. */
762 HOWTO (R_PPC_SECTOFF_HA, /* type */
763 16, /* rightshift */
764 1, /* size (0 = byte, 1 = short, 2 = long) */
765 16, /* bitsize */
766 FALSE, /* pc_relative */
767 0, /* bitpos */
768 complain_overflow_bitfield, /* complain_on_overflow */
769 ppc_elf_addr16_ha_reloc, /* special_function */
770 "R_PPC_SECTOFF_HA", /* name */
771 FALSE, /* partial_inplace */
772 0, /* src_mask */
773 0xffff, /* dst_mask */
774 FALSE), /* pcrel_offset */
775
776 /* Marker relocs for TLS. */
777 HOWTO (R_PPC_TLS,
778 0, /* rightshift */
779 2, /* size (0 = byte, 1 = short, 2 = long) */
780 32, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_PPC_TLS", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 0, /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 HOWTO (R_PPC_TLSGD,
792 0, /* rightshift */
793 2, /* size (0 = byte, 1 = short, 2 = long) */
794 32, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_PPC_TLSGD", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 HOWTO (R_PPC_TLSLD,
806 0, /* rightshift */
807 2, /* size (0 = byte, 1 = short, 2 = long) */
808 32, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 bfd_elf_generic_reloc, /* special_function */
813 "R_PPC_TLSLD", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* Computes the load module index of the load module that contains the
820 definition of its TLS sym. */
821 HOWTO (R_PPC_DTPMOD32,
822 0, /* rightshift */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
824 32, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 ppc_elf_unhandled_reloc, /* special_function */
829 "R_PPC_DTPMOD32", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* Computes a dtv-relative displacement, the difference between the value
836 of sym+add and the base address of the thread-local storage block that
837 contains the definition of sym, minus 0x8000. */
838 HOWTO (R_PPC_DTPREL32,
839 0, /* rightshift */
840 2, /* size (0 = byte, 1 = short, 2 = long) */
841 32, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 ppc_elf_unhandled_reloc, /* special_function */
846 "R_PPC_DTPREL32", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffffffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* A 16 bit dtprel reloc. */
853 HOWTO (R_PPC_DTPREL16,
854 0, /* rightshift */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
856 16, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_signed, /* complain_on_overflow */
860 ppc_elf_unhandled_reloc, /* special_function */
861 "R_PPC_DTPREL16", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* Like DTPREL16, but no overflow. */
868 HOWTO (R_PPC_DTPREL16_LO,
869 0, /* rightshift */
870 1, /* size (0 = byte, 1 = short, 2 = long) */
871 16, /* bitsize */
872 FALSE, /* pc_relative */
873 0, /* bitpos */
874 complain_overflow_dont, /* complain_on_overflow */
875 ppc_elf_unhandled_reloc, /* special_function */
876 "R_PPC_DTPREL16_LO", /* name */
877 FALSE, /* partial_inplace */
878 0, /* src_mask */
879 0xffff, /* dst_mask */
880 FALSE), /* pcrel_offset */
881
882 /* Like DTPREL16_LO, but next higher group of 16 bits. */
883 HOWTO (R_PPC_DTPREL16_HI,
884 16, /* rightshift */
885 1, /* size (0 = byte, 1 = short, 2 = long) */
886 16, /* bitsize */
887 FALSE, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc_elf_unhandled_reloc, /* special_function */
891 "R_PPC_DTPREL16_HI", /* name */
892 FALSE, /* partial_inplace */
893 0, /* src_mask */
894 0xffff, /* dst_mask */
895 FALSE), /* pcrel_offset */
896
897 /* Like DTPREL16_HI, but adjust for low 16 bits. */
898 HOWTO (R_PPC_DTPREL16_HA,
899 16, /* rightshift */
900 1, /* size (0 = byte, 1 = short, 2 = long) */
901 16, /* bitsize */
902 FALSE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc_elf_unhandled_reloc, /* special_function */
906 "R_PPC_DTPREL16_HA", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 0xffff, /* dst_mask */
910 FALSE), /* pcrel_offset */
911
912 /* Computes a tp-relative displacement, the difference between the value of
913 sym+add and the value of the thread pointer (r13). */
914 HOWTO (R_PPC_TPREL32,
915 0, /* rightshift */
916 2, /* size (0 = byte, 1 = short, 2 = long) */
917 32, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont, /* complain_on_overflow */
921 ppc_elf_unhandled_reloc, /* special_function */
922 "R_PPC_TPREL32", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffffffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* A 16 bit tprel reloc. */
929 HOWTO (R_PPC_TPREL16,
930 0, /* rightshift */
931 1, /* size (0 = byte, 1 = short, 2 = long) */
932 16, /* bitsize */
933 FALSE, /* pc_relative */
934 0, /* bitpos */
935 complain_overflow_signed, /* complain_on_overflow */
936 ppc_elf_unhandled_reloc, /* special_function */
937 "R_PPC_TPREL16", /* name */
938 FALSE, /* partial_inplace */
939 0, /* src_mask */
940 0xffff, /* dst_mask */
941 FALSE), /* pcrel_offset */
942
943 /* Like TPREL16, but no overflow. */
944 HOWTO (R_PPC_TPREL16_LO,
945 0, /* rightshift */
946 1, /* size (0 = byte, 1 = short, 2 = long) */
947 16, /* bitsize */
948 FALSE, /* pc_relative */
949 0, /* bitpos */
950 complain_overflow_dont, /* complain_on_overflow */
951 ppc_elf_unhandled_reloc, /* special_function */
952 "R_PPC_TPREL16_LO", /* name */
953 FALSE, /* partial_inplace */
954 0, /* src_mask */
955 0xffff, /* dst_mask */
956 FALSE), /* pcrel_offset */
957
958 /* Like TPREL16_LO, but next higher group of 16 bits. */
959 HOWTO (R_PPC_TPREL16_HI,
960 16, /* rightshift */
961 1, /* size (0 = byte, 1 = short, 2 = long) */
962 16, /* bitsize */
963 FALSE, /* pc_relative */
964 0, /* bitpos */
965 complain_overflow_dont, /* complain_on_overflow */
966 ppc_elf_unhandled_reloc, /* special_function */
967 "R_PPC_TPREL16_HI", /* name */
968 FALSE, /* partial_inplace */
969 0, /* src_mask */
970 0xffff, /* dst_mask */
971 FALSE), /* pcrel_offset */
972
973 /* Like TPREL16_HI, but adjust for low 16 bits. */
974 HOWTO (R_PPC_TPREL16_HA,
975 16, /* rightshift */
976 1, /* size (0 = byte, 1 = short, 2 = long) */
977 16, /* bitsize */
978 FALSE, /* pc_relative */
979 0, /* bitpos */
980 complain_overflow_dont, /* complain_on_overflow */
981 ppc_elf_unhandled_reloc, /* special_function */
982 "R_PPC_TPREL16_HA", /* name */
983 FALSE, /* partial_inplace */
984 0, /* src_mask */
985 0xffff, /* dst_mask */
986 FALSE), /* pcrel_offset */
987
988 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
989 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
990 to the first entry. */
991 HOWTO (R_PPC_GOT_TLSGD16,
992 0, /* rightshift */
993 1, /* size (0 = byte, 1 = short, 2 = long) */
994 16, /* bitsize */
995 FALSE, /* pc_relative */
996 0, /* bitpos */
997 complain_overflow_signed, /* complain_on_overflow */
998 ppc_elf_unhandled_reloc, /* special_function */
999 "R_PPC_GOT_TLSGD16", /* name */
1000 FALSE, /* partial_inplace */
1001 0, /* src_mask */
1002 0xffff, /* dst_mask */
1003 FALSE), /* pcrel_offset */
1004
1005 /* Like GOT_TLSGD16, but no overflow. */
1006 HOWTO (R_PPC_GOT_TLSGD16_LO,
1007 0, /* rightshift */
1008 1, /* size (0 = byte, 1 = short, 2 = long) */
1009 16, /* bitsize */
1010 FALSE, /* pc_relative */
1011 0, /* bitpos */
1012 complain_overflow_dont, /* complain_on_overflow */
1013 ppc_elf_unhandled_reloc, /* special_function */
1014 "R_PPC_GOT_TLSGD16_LO", /* name */
1015 FALSE, /* partial_inplace */
1016 0, /* src_mask */
1017 0xffff, /* dst_mask */
1018 FALSE), /* pcrel_offset */
1019
1020 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1021 HOWTO (R_PPC_GOT_TLSGD16_HI,
1022 16, /* rightshift */
1023 1, /* size (0 = byte, 1 = short, 2 = long) */
1024 16, /* bitsize */
1025 FALSE, /* pc_relative */
1026 0, /* bitpos */
1027 complain_overflow_dont, /* complain_on_overflow */
1028 ppc_elf_unhandled_reloc, /* special_function */
1029 "R_PPC_GOT_TLSGD16_HI", /* name */
1030 FALSE, /* partial_inplace */
1031 0, /* src_mask */
1032 0xffff, /* dst_mask */
1033 FALSE), /* pcrel_offset */
1034
1035 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1036 HOWTO (R_PPC_GOT_TLSGD16_HA,
1037 16, /* rightshift */
1038 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 16, /* bitsize */
1040 FALSE, /* pc_relative */
1041 0, /* bitpos */
1042 complain_overflow_dont, /* complain_on_overflow */
1043 ppc_elf_unhandled_reloc, /* special_function */
1044 "R_PPC_GOT_TLSGD16_HA", /* name */
1045 FALSE, /* partial_inplace */
1046 0, /* src_mask */
1047 0xffff, /* dst_mask */
1048 FALSE), /* pcrel_offset */
1049
1050 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1051 with values (sym+add)@dtpmod and zero, and computes the offset to the
1052 first entry. */
1053 HOWTO (R_PPC_GOT_TLSLD16,
1054 0, /* rightshift */
1055 1, /* size (0 = byte, 1 = short, 2 = long) */
1056 16, /* bitsize */
1057 FALSE, /* pc_relative */
1058 0, /* bitpos */
1059 complain_overflow_signed, /* complain_on_overflow */
1060 ppc_elf_unhandled_reloc, /* special_function */
1061 "R_PPC_GOT_TLSLD16", /* name */
1062 FALSE, /* partial_inplace */
1063 0, /* src_mask */
1064 0xffff, /* dst_mask */
1065 FALSE), /* pcrel_offset */
1066
1067 /* Like GOT_TLSLD16, but no overflow. */
1068 HOWTO (R_PPC_GOT_TLSLD16_LO,
1069 0, /* rightshift */
1070 1, /* size (0 = byte, 1 = short, 2 = long) */
1071 16, /* bitsize */
1072 FALSE, /* pc_relative */
1073 0, /* bitpos */
1074 complain_overflow_dont, /* complain_on_overflow */
1075 ppc_elf_unhandled_reloc, /* special_function */
1076 "R_PPC_GOT_TLSLD16_LO", /* name */
1077 FALSE, /* partial_inplace */
1078 0, /* src_mask */
1079 0xffff, /* dst_mask */
1080 FALSE), /* pcrel_offset */
1081
1082 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1083 HOWTO (R_PPC_GOT_TLSLD16_HI,
1084 16, /* rightshift */
1085 1, /* size (0 = byte, 1 = short, 2 = long) */
1086 16, /* bitsize */
1087 FALSE, /* pc_relative */
1088 0, /* bitpos */
1089 complain_overflow_dont, /* complain_on_overflow */
1090 ppc_elf_unhandled_reloc, /* special_function */
1091 "R_PPC_GOT_TLSLD16_HI", /* name */
1092 FALSE, /* partial_inplace */
1093 0, /* src_mask */
1094 0xffff, /* dst_mask */
1095 FALSE), /* pcrel_offset */
1096
1097 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1098 HOWTO (R_PPC_GOT_TLSLD16_HA,
1099 16, /* rightshift */
1100 1, /* size (0 = byte, 1 = short, 2 = long) */
1101 16, /* bitsize */
1102 FALSE, /* pc_relative */
1103 0, /* bitpos */
1104 complain_overflow_dont, /* complain_on_overflow */
1105 ppc_elf_unhandled_reloc, /* special_function */
1106 "R_PPC_GOT_TLSLD16_HA", /* name */
1107 FALSE, /* partial_inplace */
1108 0, /* src_mask */
1109 0xffff, /* dst_mask */
1110 FALSE), /* pcrel_offset */
1111
1112 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1113 the offset to the entry. */
1114 HOWTO (R_PPC_GOT_DTPREL16,
1115 0, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc_elf_unhandled_reloc, /* special_function */
1122 "R_PPC_GOT_DTPREL16", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like GOT_DTPREL16, but no overflow. */
1129 HOWTO (R_PPC_GOT_DTPREL16_LO,
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc_elf_unhandled_reloc, /* special_function */
1137 "R_PPC_GOT_DTPREL16_LO", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xffff, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1144 HOWTO (R_PPC_GOT_DTPREL16_HI,
1145 16, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc_elf_unhandled_reloc, /* special_function */
1152 "R_PPC_GOT_DTPREL16_HI", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xffff, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1159 HOWTO (R_PPC_GOT_DTPREL16_HA,
1160 16, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_dont, /* complain_on_overflow */
1166 ppc_elf_unhandled_reloc, /* special_function */
1167 "R_PPC_GOT_DTPREL16_HA", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xffff, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1174 offset to the entry. */
1175 HOWTO (R_PPC_GOT_TPREL16,
1176 0, /* rightshift */
1177 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 16, /* bitsize */
1179 FALSE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_signed, /* complain_on_overflow */
1182 ppc_elf_unhandled_reloc, /* special_function */
1183 "R_PPC_GOT_TPREL16", /* name */
1184 FALSE, /* partial_inplace */
1185 0, /* src_mask */
1186 0xffff, /* dst_mask */
1187 FALSE), /* pcrel_offset */
1188
1189 /* Like GOT_TPREL16, but no overflow. */
1190 HOWTO (R_PPC_GOT_TPREL16_LO,
1191 0, /* rightshift */
1192 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 16, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_dont, /* complain_on_overflow */
1197 ppc_elf_unhandled_reloc, /* special_function */
1198 "R_PPC_GOT_TPREL16_LO", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1205 HOWTO (R_PPC_GOT_TPREL16_HI,
1206 16, /* rightshift */
1207 1, /* size (0 = byte, 1 = short, 2 = long) */
1208 16, /* bitsize */
1209 FALSE, /* pc_relative */
1210 0, /* bitpos */
1211 complain_overflow_dont, /* complain_on_overflow */
1212 ppc_elf_unhandled_reloc, /* special_function */
1213 "R_PPC_GOT_TPREL16_HI", /* name */
1214 FALSE, /* partial_inplace */
1215 0, /* src_mask */
1216 0xffff, /* dst_mask */
1217 FALSE), /* pcrel_offset */
1218
1219 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1220 HOWTO (R_PPC_GOT_TPREL16_HA,
1221 16, /* rightshift */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 FALSE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_dont, /* complain_on_overflow */
1227 ppc_elf_unhandled_reloc, /* special_function */
1228 "R_PPC_GOT_TPREL16_HA", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0xffff, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1233
1234 /* The remaining relocs are from the Embedded ELF ABI, and are not
1235 in the SVR4 ELF ABI. */
1236
1237 /* 32 bit value resulting from the addend minus the symbol. */
1238 HOWTO (R_PPC_EMB_NADDR32, /* type */
1239 0, /* rightshift */
1240 2, /* size (0 = byte, 1 = short, 2 = long) */
1241 32, /* bitsize */
1242 FALSE, /* pc_relative */
1243 0, /* bitpos */
1244 complain_overflow_bitfield, /* complain_on_overflow */
1245 bfd_elf_generic_reloc, /* special_function */
1246 "R_PPC_EMB_NADDR32", /* name */
1247 FALSE, /* partial_inplace */
1248 0, /* src_mask */
1249 0xffffffff, /* dst_mask */
1250 FALSE), /* pcrel_offset */
1251
1252 /* 16 bit value resulting from the addend minus the symbol. */
1253 HOWTO (R_PPC_EMB_NADDR16, /* type */
1254 0, /* rightshift */
1255 1, /* size (0 = byte, 1 = short, 2 = long) */
1256 16, /* bitsize */
1257 FALSE, /* pc_relative */
1258 0, /* bitpos */
1259 complain_overflow_bitfield, /* complain_on_overflow */
1260 bfd_elf_generic_reloc, /* special_function */
1261 "R_PPC_EMB_NADDR16", /* name */
1262 FALSE, /* partial_inplace */
1263 0, /* src_mask */
1264 0xffff, /* dst_mask */
1265 FALSE), /* pcrel_offset */
1266
1267 /* 16 bit value resulting from the addend minus the symbol. */
1268 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1269 0, /* rightshift */
1270 1, /* size (0 = byte, 1 = short, 2 = long) */
1271 16, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont,/* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC_EMB_ADDR16_LO", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0xffff, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* The high order 16 bits of the addend minus the symbol. */
1283 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1284 16, /* rightshift */
1285 1, /* size (0 = byte, 1 = short, 2 = long) */
1286 16, /* bitsize */
1287 FALSE, /* pc_relative */
1288 0, /* bitpos */
1289 complain_overflow_dont, /* complain_on_overflow */
1290 bfd_elf_generic_reloc, /* special_function */
1291 "R_PPC_EMB_NADDR16_HI", /* name */
1292 FALSE, /* partial_inplace */
1293 0, /* src_mask */
1294 0xffff, /* dst_mask */
1295 FALSE), /* pcrel_offset */
1296
1297 /* The high order 16 bits of the result of the addend minus the address,
1298 plus 1 if the contents of the low 16 bits, treated as a signed number,
1299 is negative. */
1300 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1301 16, /* rightshift */
1302 1, /* size (0 = byte, 1 = short, 2 = long) */
1303 16, /* bitsize */
1304 FALSE, /* pc_relative */
1305 0, /* bitpos */
1306 complain_overflow_dont, /* complain_on_overflow */
1307 ppc_elf_addr16_ha_reloc, /* special_function */
1308 "R_PPC_EMB_NADDR16_HA", /* name */
1309 FALSE, /* partial_inplace */
1310 0, /* src_mask */
1311 0xffff, /* dst_mask */
1312 FALSE), /* pcrel_offset */
1313
1314 /* 16 bit value resulting from allocating a 4 byte word to hold an
1315 address in the .sdata section, and returning the offset from
1316 _SDA_BASE_ for that relocation. */
1317 HOWTO (R_PPC_EMB_SDAI16, /* type */
1318 0, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_signed, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC_EMB_SDAI16", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* 16 bit value resulting from allocating a 4 byte word to hold an
1332 address in the .sdata2 section, and returning the offset from
1333 _SDA2_BASE_ for that relocation. */
1334 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1335 0, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_signed, /* complain_on_overflow */
1341 bfd_elf_generic_reloc, /* special_function */
1342 "R_PPC_EMB_SDA2I16", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1349 small data items. */
1350 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_signed, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_EMB_SDA2REL", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1365 signed offset from the appropriate base, and filling in the register
1366 field with the appropriate register (0, 2, or 13). */
1367 HOWTO (R_PPC_EMB_SDA21, /* type */
1368 0, /* rightshift */
1369 2, /* size (0 = byte, 1 = short, 2 = long) */
1370 16, /* bitsize */
1371 FALSE, /* pc_relative */
1372 0, /* bitpos */
1373 complain_overflow_signed, /* complain_on_overflow */
1374 bfd_elf_generic_reloc, /* special_function */
1375 "R_PPC_EMB_SDA21", /* name */
1376 FALSE, /* partial_inplace */
1377 0, /* src_mask */
1378 0xffff, /* dst_mask */
1379 FALSE), /* pcrel_offset */
1380
1381 /* Relocation not handled: R_PPC_EMB_MRKREF */
1382 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1383 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1384 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1385 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1386 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1387
1388 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1389 in the 16 bit signed offset from the appropriate base, and filling in the
1390 register field with the appropriate register (0, 2, or 13). */
1391 HOWTO (R_PPC_EMB_RELSDA, /* type */
1392 0, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_signed, /* complain_on_overflow */
1398 bfd_elf_generic_reloc, /* special_function */
1399 "R_PPC_EMB_RELSDA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* A relative 8 bit branch. */
1406 HOWTO (R_PPC_VLE_REL8, /* type */
1407 1, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 8, /* bitsize */
1410 TRUE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_signed, /* complain_on_overflow */
1413 bfd_elf_generic_reloc, /* special_function */
1414 "R_PPC_VLE_REL8", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xff, /* dst_mask */
1418 TRUE), /* pcrel_offset */
1419
1420 /* A relative 15 bit branch. */
1421 HOWTO (R_PPC_VLE_REL15, /* type */
1422 1, /* rightshift */
1423 2, /* size (0 = byte, 1 = short, 2 = long) */
1424 15, /* bitsize */
1425 TRUE, /* pc_relative */
1426 1, /* bitpos */
1427 complain_overflow_signed, /* complain_on_overflow */
1428 bfd_elf_generic_reloc, /* special_function */
1429 "R_PPC_VLE_REL15", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xfe, /* dst_mask */
1433 TRUE), /* pcrel_offset */
1434
1435 /* A relative 24 bit branch. */
1436 HOWTO (R_PPC_VLE_REL24, /* type */
1437 1, /* rightshift */
1438 2, /* size (0 = byte, 1 = short, 2 = long) */
1439 24, /* bitsize */
1440 TRUE, /* pc_relative */
1441 1, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 bfd_elf_generic_reloc, /* special_function */
1444 "R_PPC_VLE_REL24", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0x1fffffe, /* dst_mask */
1448 TRUE), /* pcrel_offset */
1449
1450 /* The 16 LSBS in split16a format. */
1451 HOWTO (R_PPC_VLE_LO16A, /* type */
1452 0, /* rightshift */
1453 2, /* size (0 = byte, 1 = short, 2 = long) */
1454 32, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_bitfield, /* complain_on_overflow */
1458 bfd_elf_generic_reloc, /* special_function */
1459 "R_PPC_VLE_LO16A", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0x1f007ff, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* The 16 LSBS in split16d format. */
1466 HOWTO (R_PPC_VLE_LO16D, /* type */
1467 0, /* rightshift */
1468 2, /* size (0 = byte, 1 = short, 2 = long) */
1469 32, /* bitsize */
1470 FALSE, /* pc_relative */
1471 0, /* bitpos */
1472 complain_overflow_bitfield, /* complain_on_overflow */
1473 bfd_elf_generic_reloc, /* special_function */
1474 "R_PPC_VLE_LO16D", /* name */
1475 FALSE, /* partial_inplace */
1476 0, /* src_mask */
1477 0x1f07ff, /* dst_mask */
1478 FALSE), /* pcrel_offset */
1479
1480 /* Bits 16-31 split16a format. */
1481 HOWTO (R_PPC_VLE_HI16A, /* type */
1482 0, /* rightshift */
1483 2, /* size (0 = byte, 1 = short, 2 = long) */
1484 32, /* bitsize */
1485 FALSE, /* pc_relative */
1486 0, /* bitpos */
1487 complain_overflow_bitfield, /* complain_on_overflow */
1488 bfd_elf_generic_reloc, /* special_function */
1489 "R_PPC_VLE_HI16A", /* name */
1490 FALSE, /* partial_inplace */
1491 0, /* src_mask */
1492 0x1f007ff, /* dst_mask */
1493 FALSE), /* pcrel_offset */
1494
1495 /* Bits 16-31 split16d format. */
1496 HOWTO (R_PPC_VLE_HI16D, /* type */
1497 0, /* rightshift */
1498 2, /* size (0 = byte, 1 = short, 2 = long) */
1499 32, /* bitsize */
1500 FALSE, /* pc_relative */
1501 0, /* bitpos */
1502 complain_overflow_bitfield, /* complain_on_overflow */
1503 bfd_elf_generic_reloc, /* special_function */
1504 "R_PPC_VLE_HI16D", /* name */
1505 FALSE, /* partial_inplace */
1506 0, /* src_mask */
1507 0x1f07ff, /* dst_mask */
1508 FALSE), /* pcrel_offset */
1509
1510 /* Bits 16-31 (High Adjusted) in split16a format. */
1511 HOWTO (R_PPC_VLE_HA16A, /* type */
1512 0, /* rightshift */
1513 2, /* size (0 = byte, 1 = short, 2 = long) */
1514 32, /* bitsize */
1515 FALSE, /* pc_relative */
1516 0, /* bitpos */
1517 complain_overflow_bitfield, /* complain_on_overflow */
1518 bfd_elf_generic_reloc, /* special_function */
1519 "R_PPC_VLE_HA16A", /* name */
1520 FALSE, /* partial_inplace */
1521 0, /* src_mask */
1522 0x1f007ff, /* dst_mask */
1523 FALSE), /* pcrel_offset */
1524
1525 /* Bits 16-31 (High Adjusted) in split16d format. */
1526 HOWTO (R_PPC_VLE_HA16D, /* type */
1527 0, /* rightshift */
1528 2, /* size (0 = byte, 1 = short, 2 = long) */
1529 32, /* bitsize */
1530 FALSE, /* pc_relative */
1531 0, /* bitpos */
1532 complain_overflow_bitfield, /* complain_on_overflow */
1533 bfd_elf_generic_reloc, /* special_function */
1534 "R_PPC_VLE_HA16D", /* name */
1535 FALSE, /* partial_inplace */
1536 0, /* src_mask */
1537 0x1f07ff, /* dst_mask */
1538 FALSE), /* pcrel_offset */
1539
1540 /* This reloc does nothing. */
1541 HOWTO (R_PPC_VLE_SDA21, /* type */
1542 0, /* rightshift */
1543 2, /* size (0 = byte, 1 = short, 2 = long) */
1544 32, /* bitsize */
1545 FALSE, /* pc_relative */
1546 0, /* bitpos */
1547 complain_overflow_bitfield, /* complain_on_overflow */
1548 bfd_elf_generic_reloc, /* special_function */
1549 "R_PPC_VLE_SDA21", /* name */
1550 FALSE, /* partial_inplace */
1551 0, /* src_mask */
1552 0xffff, /* dst_mask */
1553 FALSE), /* pcrel_offset */
1554
1555 /* This reloc does nothing. */
1556 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1557 0, /* rightshift */
1558 2, /* size (0 = byte, 1 = short, 2 = long) */
1559 32, /* bitsize */
1560 FALSE, /* pc_relative */
1561 0, /* bitpos */
1562 complain_overflow_bitfield, /* complain_on_overflow */
1563 bfd_elf_generic_reloc, /* special_function */
1564 "R_PPC_VLE_SDA21_LO", /* name */
1565 FALSE, /* partial_inplace */
1566 0, /* src_mask */
1567 0, /* dst_mask */
1568 FALSE), /* pcrel_offset */
1569
1570 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1571 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1572 0, /* rightshift */
1573 2, /* size (0 = byte, 1 = short, 2 = long) */
1574 32, /* bitsize */
1575 FALSE, /* pc_relative */
1576 0, /* bitpos */
1577 complain_overflow_bitfield, /* complain_on_overflow */
1578 bfd_elf_generic_reloc, /* special_function */
1579 "R_PPC_VLE_SDAREL_LO16A", /* name */
1580 FALSE, /* partial_inplace */
1581 0, /* src_mask */
1582 0x1f007ff, /* dst_mask */
1583 FALSE), /* pcrel_offset */
1584
1585 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1586 /* This reloc does nothing. */
1587 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1588 0, /* rightshift */
1589 2, /* size (0 = byte, 1 = short, 2 = long) */
1590 32, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_bitfield, /* complain_on_overflow */
1594 bfd_elf_generic_reloc, /* special_function */
1595 "R_PPC_VLE_SDAREL_LO16D", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0x1f07ff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1602 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1603 0, /* rightshift */
1604 2, /* size (0 = byte, 1 = short, 2 = long) */
1605 32, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_bitfield, /* complain_on_overflow */
1609 bfd_elf_generic_reloc, /* special_function */
1610 "R_PPC_VLE_SDAREL_HI16A", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0x1f007ff, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1617 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1618 0, /* rightshift */
1619 2, /* size (0 = byte, 1 = short, 2 = long) */
1620 32, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_bitfield, /* complain_on_overflow */
1624 bfd_elf_generic_reloc, /* special_function */
1625 "R_PPC_VLE_SDAREL_HI16D", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0x1f07ff, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1632 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1633 0, /* rightshift */
1634 2, /* size (0 = byte, 1 = short, 2 = long) */
1635 32, /* bitsize */
1636 FALSE, /* pc_relative */
1637 0, /* bitpos */
1638 complain_overflow_bitfield, /* complain_on_overflow */
1639 bfd_elf_generic_reloc, /* special_function */
1640 "R_PPC_VLE_SDAREL_HA16A", /* name */
1641 FALSE, /* partial_inplace */
1642 0, /* src_mask */
1643 0x1f007ff, /* dst_mask */
1644 FALSE), /* pcrel_offset */
1645
1646 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1647 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1648 0, /* rightshift */
1649 2, /* size (0 = byte, 1 = short, 2 = long) */
1650 32, /* bitsize */
1651 FALSE, /* pc_relative */
1652 0, /* bitpos */
1653 complain_overflow_bitfield, /* complain_on_overflow */
1654 bfd_elf_generic_reloc, /* special_function */
1655 "R_PPC_VLE_SDAREL_HA16D", /* name */
1656 FALSE, /* partial_inplace */
1657 0, /* src_mask */
1658 0x1f07ff, /* dst_mask */
1659 FALSE), /* pcrel_offset */
1660
1661 HOWTO (R_PPC_IRELATIVE, /* type */
1662 0, /* rightshift */
1663 2, /* size (0 = byte, 1 = short, 2 = long) */
1664 32, /* bitsize */
1665 FALSE, /* pc_relative */
1666 0, /* bitpos */
1667 complain_overflow_bitfield, /* complain_on_overflow */
1668 bfd_elf_generic_reloc, /* special_function */
1669 "R_PPC_IRELATIVE", /* name */
1670 FALSE, /* partial_inplace */
1671 0, /* src_mask */
1672 0xffffffff, /* dst_mask */
1673 FALSE), /* pcrel_offset */
1674
1675 /* A 16 bit relative relocation. */
1676 HOWTO (R_PPC_REL16, /* type */
1677 0, /* rightshift */
1678 1, /* size (0 = byte, 1 = short, 2 = long) */
1679 16, /* bitsize */
1680 TRUE, /* pc_relative */
1681 0, /* bitpos */
1682 complain_overflow_bitfield, /* complain_on_overflow */
1683 bfd_elf_generic_reloc, /* special_function */
1684 "R_PPC_REL16", /* name */
1685 FALSE, /* partial_inplace */
1686 0, /* src_mask */
1687 0xffff, /* dst_mask */
1688 TRUE), /* pcrel_offset */
1689
1690 /* A 16 bit relative relocation without overflow. */
1691 HOWTO (R_PPC_REL16_LO, /* type */
1692 0, /* rightshift */
1693 1, /* size (0 = byte, 1 = short, 2 = long) */
1694 16, /* bitsize */
1695 TRUE, /* pc_relative */
1696 0, /* bitpos */
1697 complain_overflow_dont,/* complain_on_overflow */
1698 bfd_elf_generic_reloc, /* special_function */
1699 "R_PPC_REL16_LO", /* name */
1700 FALSE, /* partial_inplace */
1701 0, /* src_mask */
1702 0xffff, /* dst_mask */
1703 TRUE), /* pcrel_offset */
1704
1705 /* The high order 16 bits of a relative address. */
1706 HOWTO (R_PPC_REL16_HI, /* type */
1707 16, /* rightshift */
1708 1, /* size (0 = byte, 1 = short, 2 = long) */
1709 16, /* bitsize */
1710 TRUE, /* pc_relative */
1711 0, /* bitpos */
1712 complain_overflow_dont, /* complain_on_overflow */
1713 bfd_elf_generic_reloc, /* special_function */
1714 "R_PPC_REL16_HI", /* name */
1715 FALSE, /* partial_inplace */
1716 0, /* src_mask */
1717 0xffff, /* dst_mask */
1718 TRUE), /* pcrel_offset */
1719
1720 /* The high order 16 bits of a relative address, plus 1 if the contents of
1721 the low 16 bits, treated as a signed number, is negative. */
1722 HOWTO (R_PPC_REL16_HA, /* type */
1723 16, /* rightshift */
1724 1, /* size (0 = byte, 1 = short, 2 = long) */
1725 16, /* bitsize */
1726 TRUE, /* pc_relative */
1727 0, /* bitpos */
1728 complain_overflow_dont, /* complain_on_overflow */
1729 ppc_elf_addr16_ha_reloc, /* special_function */
1730 "R_PPC_REL16_HA", /* name */
1731 FALSE, /* partial_inplace */
1732 0, /* src_mask */
1733 0xffff, /* dst_mask */
1734 TRUE), /* pcrel_offset */
1735
1736 /* GNU extension to record C++ vtable hierarchy. */
1737 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1738 0, /* rightshift */
1739 0, /* size (0 = byte, 1 = short, 2 = long) */
1740 0, /* bitsize */
1741 FALSE, /* pc_relative */
1742 0, /* bitpos */
1743 complain_overflow_dont, /* complain_on_overflow */
1744 NULL, /* special_function */
1745 "R_PPC_GNU_VTINHERIT", /* name */
1746 FALSE, /* partial_inplace */
1747 0, /* src_mask */
1748 0, /* dst_mask */
1749 FALSE), /* pcrel_offset */
1750
1751 /* GNU extension to record C++ vtable member usage. */
1752 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1753 0, /* rightshift */
1754 0, /* size (0 = byte, 1 = short, 2 = long) */
1755 0, /* bitsize */
1756 FALSE, /* pc_relative */
1757 0, /* bitpos */
1758 complain_overflow_dont, /* complain_on_overflow */
1759 NULL, /* special_function */
1760 "R_PPC_GNU_VTENTRY", /* name */
1761 FALSE, /* partial_inplace */
1762 0, /* src_mask */
1763 0, /* dst_mask */
1764 FALSE), /* pcrel_offset */
1765
1766 /* Phony reloc to handle AIX style TOC entries. */
1767 HOWTO (R_PPC_TOC16, /* type */
1768 0, /* rightshift */
1769 1, /* size (0 = byte, 1 = short, 2 = long) */
1770 16, /* bitsize */
1771 FALSE, /* pc_relative */
1772 0, /* bitpos */
1773 complain_overflow_signed, /* complain_on_overflow */
1774 bfd_elf_generic_reloc, /* special_function */
1775 "R_PPC_TOC16", /* name */
1776 FALSE, /* partial_inplace */
1777 0, /* src_mask */
1778 0xffff, /* dst_mask */
1779 FALSE), /* pcrel_offset */
1780 };
1781
1782 /* External 32-bit PPC structure for PRPSINFO. This structure is
1783 ABI-defined, thus we choose to use char arrays here in order to
1784 avoid dealing with different types in different architectures.
1785
1786 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1787 most non-PPC architectures use `short int'.
1788
1789 This structure will ultimately be written in the corefile's note
1790 section, as the PRPSINFO. */
1791
1792 struct elf_external_ppc_linux_prpsinfo32
1793 {
1794 char pr_state; /* Numeric process state. */
1795 char pr_sname; /* Char for pr_state. */
1796 char pr_zomb; /* Zombie. */
1797 char pr_nice; /* Nice val. */
1798 char pr_flag[4]; /* Flags. */
1799 char pr_uid[4];
1800 char pr_gid[4];
1801 char pr_pid[4];
1802 char pr_ppid[4];
1803 char pr_pgrp[4];
1804 char pr_sid[4];
1805 char pr_fname[16]; /* Filename of executable. */
1806 char pr_psargs[80]; /* Initial part of arg list. */
1807 };
1808
1809 /* Helper macro to swap (properly handling endianess) things from the
1810 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32'
1811 structure.
1812
1813 Note that FROM should be a pointer, and TO should be the explicit type. */
1814
1815 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \
1816 do \
1817 { \
1818 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \
1819 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \
1820 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \
1821 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \
1822 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \
1823 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \
1824 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \
1825 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \
1826 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \
1827 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \
1828 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \
1829 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \
1830 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \
1831 } while (0)
1832
1833 \f
1834 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1835
1836 static void
1837 ppc_elf_howto_init (void)
1838 {
1839 unsigned int i, type;
1840
1841 for (i = 0;
1842 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1843 i++)
1844 {
1845 type = ppc_elf_howto_raw[i].type;
1846 if (type >= (sizeof (ppc_elf_howto_table)
1847 / sizeof (ppc_elf_howto_table[0])))
1848 abort ();
1849 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1850 }
1851 }
1852
1853 static reloc_howto_type *
1854 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1855 bfd_reloc_code_real_type code)
1856 {
1857 enum elf_ppc_reloc_type r;
1858
1859 /* Initialize howto table if not already done. */
1860 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1861 ppc_elf_howto_init ();
1862
1863 switch (code)
1864 {
1865 default:
1866 return NULL;
1867
1868 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1869 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1870 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1871 case BFD_RELOC_PPC64_ADDR16_DS:
1872 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1873 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1874 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1875 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1876 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1877 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1878 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1879 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1880 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1881 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1882 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1883 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1884 case BFD_RELOC_PPC64_GOT16_DS:
1885 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1886 case BFD_RELOC_PPC64_GOT16_LO_DS:
1887 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1888 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1889 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1890 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1891 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1892 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1893 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1894 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1895 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1896 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1897 case BFD_RELOC_PPC64_PLT16_LO_DS:
1898 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1899 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1900 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1901 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1902 case BFD_RELOC_PPC64_SECTOFF_DS:
1903 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1904 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1905 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1906 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1907 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1908 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1909 case BFD_RELOC_PPC64_TOC16_DS:
1910 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1911 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1912 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1913 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1914 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1915 case BFD_RELOC_PPC64_TPREL16_DS:
1916 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1917 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1918 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1919 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1920 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1921 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1922 case BFD_RELOC_PPC64_DTPREL16_DS:
1923 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1924 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1925 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1926 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1927 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1928 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1929 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1930 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1931 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1932 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1933 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1934 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1935 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1936 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1937 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1938 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1939 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1940 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1941 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1942 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1943 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1944 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1945 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1946 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1947 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1948 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1949 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1950 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1951 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1952 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1953 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1954 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1955 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1956 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1957 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1958 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1959 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1960 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1961 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1962 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1963 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1964 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1965 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1966 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1967 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1968 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1969 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1970 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1971 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1972 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1973 r = R_PPC_VLE_SDAREL_LO16A;
1974 break;
1975 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1976 r = R_PPC_VLE_SDAREL_LO16D;
1977 break;
1978 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1979 r = R_PPC_VLE_SDAREL_HI16A;
1980 break;
1981 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1982 r = R_PPC_VLE_SDAREL_HI16D;
1983 break;
1984 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1985 r = R_PPC_VLE_SDAREL_HA16A;
1986 break;
1987 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1988 r = R_PPC_VLE_SDAREL_HA16D;
1989 break;
1990 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1991 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1992 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1993 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1994 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1995 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1996 }
1997
1998 return ppc_elf_howto_table[r];
1999 };
2000
2001 static reloc_howto_type *
2002 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2003 const char *r_name)
2004 {
2005 unsigned int i;
2006
2007 for (i = 0;
2008 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2009 i++)
2010 if (ppc_elf_howto_raw[i].name != NULL
2011 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2012 return &ppc_elf_howto_raw[i];
2013
2014 return NULL;
2015 }
2016
2017 /* Set the howto pointer for a PowerPC ELF reloc. */
2018
2019 static void
2020 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2021 arelent *cache_ptr,
2022 Elf_Internal_Rela *dst)
2023 {
2024 /* Initialize howto table if not already done. */
2025 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2026 ppc_elf_howto_init ();
2027
2028 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2029 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2030
2031 /* Just because the above assert didn't trigger doesn't mean that
2032 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2033 if (!cache_ptr->howto)
2034 {
2035 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2036 abfd, ELF32_R_TYPE (dst->r_info));
2037 bfd_set_error (bfd_error_bad_value);
2038
2039 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2040 }
2041 }
2042
2043 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2044
2045 static bfd_reloc_status_type
2046 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2047 arelent *reloc_entry,
2048 asymbol *symbol,
2049 void *data ATTRIBUTE_UNUSED,
2050 asection *input_section,
2051 bfd *output_bfd,
2052 char **error_message ATTRIBUTE_UNUSED)
2053 {
2054 bfd_vma relocation;
2055
2056 if (output_bfd != NULL)
2057 {
2058 reloc_entry->address += input_section->output_offset;
2059 return bfd_reloc_ok;
2060 }
2061
2062 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2063 return bfd_reloc_outofrange;
2064
2065 if (bfd_is_com_section (symbol->section))
2066 relocation = 0;
2067 else
2068 relocation = symbol->value;
2069
2070 relocation += symbol->section->output_section->vma;
2071 relocation += symbol->section->output_offset;
2072 relocation += reloc_entry->addend;
2073 if (reloc_entry->howto->pc_relative)
2074 relocation -= reloc_entry->address;
2075
2076 reloc_entry->addend += (relocation & 0x8000) << 1;
2077
2078 return bfd_reloc_continue;
2079 }
2080
2081 static bfd_reloc_status_type
2082 ppc_elf_unhandled_reloc (bfd *abfd,
2083 arelent *reloc_entry,
2084 asymbol *symbol,
2085 void *data,
2086 asection *input_section,
2087 bfd *output_bfd,
2088 char **error_message)
2089 {
2090 /* If this is a relocatable link (output_bfd test tells us), just
2091 call the generic function. Any adjustment will be done at final
2092 link time. */
2093 if (output_bfd != NULL)
2094 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2095 input_section, output_bfd, error_message);
2096
2097 if (error_message != NULL)
2098 {
2099 static char buf[60];
2100 sprintf (buf, _("generic linker can't handle %s"),
2101 reloc_entry->howto->name);
2102 *error_message = buf;
2103 }
2104 return bfd_reloc_dangerous;
2105 }
2106 \f
2107 /* Sections created by the linker. */
2108
2109 typedef struct elf_linker_section
2110 {
2111 /* Pointer to the bfd section. */
2112 asection *section;
2113 /* Section name. */
2114 const char *name;
2115 /* Associated bss section name. */
2116 const char *bss_name;
2117 /* Associated symbol name. */
2118 const char *sym_name;
2119 /* Associated symbol. */
2120 struct elf_link_hash_entry *sym;
2121 } elf_linker_section_t;
2122
2123 /* Linked list of allocated pointer entries. This hangs off of the
2124 symbol lists, and provides allows us to return different pointers,
2125 based on different addend's. */
2126
2127 typedef struct elf_linker_section_pointers
2128 {
2129 /* next allocated pointer for this symbol */
2130 struct elf_linker_section_pointers *next;
2131 /* offset of pointer from beginning of section */
2132 bfd_vma offset;
2133 /* addend used */
2134 bfd_vma addend;
2135 /* which linker section this is */
2136 elf_linker_section_t *lsect;
2137 } elf_linker_section_pointers_t;
2138
2139 struct ppc_elf_obj_tdata
2140 {
2141 struct elf_obj_tdata elf;
2142
2143 /* A mapping from local symbols to offsets into the various linker
2144 sections added. This is index by the symbol index. */
2145 elf_linker_section_pointers_t **linker_section_pointers;
2146
2147 /* Flags used to auto-detect plt type. */
2148 unsigned int makes_plt_call : 1;
2149 unsigned int has_rel16 : 1;
2150 };
2151
2152 #define ppc_elf_tdata(bfd) \
2153 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2154
2155 #define elf_local_ptr_offsets(bfd) \
2156 (ppc_elf_tdata (bfd)->linker_section_pointers)
2157
2158 #define is_ppc_elf(bfd) \
2159 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2160 && elf_object_id (bfd) == PPC32_ELF_DATA)
2161
2162 /* Override the generic function because we store some extras. */
2163
2164 static bfd_boolean
2165 ppc_elf_mkobject (bfd *abfd)
2166 {
2167 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2168 PPC32_ELF_DATA);
2169 }
2170
2171 /* Fix bad default arch selected for a 32 bit input bfd when the
2172 default is 64 bit. */
2173
2174 static bfd_boolean
2175 ppc_elf_object_p (bfd *abfd)
2176 {
2177 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2178 {
2179 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2180
2181 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2182 {
2183 /* Relies on arch after 64 bit default being 32 bit default. */
2184 abfd->arch_info = abfd->arch_info->next;
2185 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2186 }
2187 }
2188 return TRUE;
2189 }
2190
2191 /* Function to set whether a module needs the -mrelocatable bit set. */
2192
2193 static bfd_boolean
2194 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2195 {
2196 BFD_ASSERT (!elf_flags_init (abfd)
2197 || elf_elfheader (abfd)->e_flags == flags);
2198
2199 elf_elfheader (abfd)->e_flags = flags;
2200 elf_flags_init (abfd) = TRUE;
2201 return TRUE;
2202 }
2203
2204 /* Support for core dump NOTE sections. */
2205
2206 static bfd_boolean
2207 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2208 {
2209 int offset;
2210 unsigned int size;
2211
2212 switch (note->descsz)
2213 {
2214 default:
2215 return FALSE;
2216
2217 case 268: /* Linux/PPC. */
2218 /* pr_cursig */
2219 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2220
2221 /* pr_pid */
2222 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2223
2224 /* pr_reg */
2225 offset = 72;
2226 size = 192;
2227
2228 break;
2229 }
2230
2231 /* Make a ".reg/999" section. */
2232 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2233 size, note->descpos + offset);
2234 }
2235
2236 static bfd_boolean
2237 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2238 {
2239 switch (note->descsz)
2240 {
2241 default:
2242 return FALSE;
2243
2244 case 128: /* Linux/PPC elf_prpsinfo. */
2245 elf_tdata (abfd)->core->pid
2246 = bfd_get_32 (abfd, note->descdata + 16);
2247 elf_tdata (abfd)->core->program
2248 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2249 elf_tdata (abfd)->core->command
2250 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2251 }
2252
2253 /* Note that for some reason, a spurious space is tacked
2254 onto the end of the args in some (at least one anyway)
2255 implementations, so strip it off if it exists. */
2256
2257 {
2258 char *command = elf_tdata (abfd)->core->command;
2259 int n = strlen (command);
2260
2261 if (0 < n && command[n - 1] == ' ')
2262 command[n - 1] = '\0';
2263 }
2264
2265 return TRUE;
2266 }
2267
2268 char *
2269 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2270 const struct elf_internal_linux_prpsinfo *prpsinfo)
2271 {
2272 struct elf_external_ppc_linux_prpsinfo32 data;
2273
2274 memset (&data, 0, sizeof (data));
2275 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2276
2277 return elfcore_write_note (abfd, buf, bufsiz,
2278 "CORE", NT_PRPSINFO, &data, sizeof (data));
2279 }
2280
2281 static char *
2282 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2283 {
2284 switch (note_type)
2285 {
2286 default:
2287 return NULL;
2288
2289 case NT_PRPSINFO:
2290 {
2291 char data[128];
2292 va_list ap;
2293
2294 va_start (ap, note_type);
2295 memset (data, 0, sizeof (data));
2296 strncpy (data + 32, va_arg (ap, const char *), 16);
2297 strncpy (data + 48, va_arg (ap, const char *), 80);
2298 va_end (ap);
2299 return elfcore_write_note (abfd, buf, bufsiz,
2300 "CORE", note_type, data, sizeof (data));
2301 }
2302
2303 case NT_PRSTATUS:
2304 {
2305 char data[268];
2306 va_list ap;
2307 long pid;
2308 int cursig;
2309 const void *greg;
2310
2311 va_start (ap, note_type);
2312 memset (data, 0, 72);
2313 pid = va_arg (ap, long);
2314 bfd_put_32 (abfd, pid, data + 24);
2315 cursig = va_arg (ap, int);
2316 bfd_put_16 (abfd, cursig, data + 12);
2317 greg = va_arg (ap, const void *);
2318 memcpy (data + 72, greg, 192);
2319 memset (data + 264, 0, 4);
2320 va_end (ap);
2321 return elfcore_write_note (abfd, buf, bufsiz,
2322 "CORE", note_type, data, sizeof (data));
2323 }
2324 }
2325 }
2326
2327 static flagword
2328 ppc_elf_lookup_section_flags (char *flag_name)
2329 {
2330
2331 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2332 return SHF_PPC_VLE;
2333
2334 return 0;
2335 }
2336
2337 /* Add the VLE flag if required. */
2338
2339 bfd_boolean
2340 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2341 {
2342 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2343 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2344 shdr->sh_flags |= SHF_PPC_VLE;
2345
2346 return TRUE;
2347 }
2348
2349 /* Return address for Ith PLT stub in section PLT, for relocation REL
2350 or (bfd_vma) -1 if it should not be included. */
2351
2352 static bfd_vma
2353 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2354 const asection *plt ATTRIBUTE_UNUSED,
2355 const arelent *rel)
2356 {
2357 return rel->address;
2358 }
2359
2360 /* Handle a PowerPC specific section when reading an object file. This
2361 is called when bfd_section_from_shdr finds a section with an unknown
2362 type. */
2363
2364 static bfd_boolean
2365 ppc_elf_section_from_shdr (bfd *abfd,
2366 Elf_Internal_Shdr *hdr,
2367 const char *name,
2368 int shindex)
2369 {
2370 asection *newsect;
2371 flagword flags;
2372
2373 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2374 return FALSE;
2375
2376 newsect = hdr->bfd_section;
2377 flags = bfd_get_section_flags (abfd, newsect);
2378 if (hdr->sh_flags & SHF_EXCLUDE)
2379 flags |= SEC_EXCLUDE;
2380
2381 if (hdr->sh_type == SHT_ORDERED)
2382 flags |= SEC_SORT_ENTRIES;
2383
2384 bfd_set_section_flags (abfd, newsect, flags);
2385 return TRUE;
2386 }
2387
2388 /* Set up any other section flags and such that may be necessary. */
2389
2390 static bfd_boolean
2391 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2392 Elf_Internal_Shdr *shdr,
2393 asection *asect)
2394 {
2395 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2396 shdr->sh_type = SHT_ORDERED;
2397
2398 return TRUE;
2399 }
2400
2401 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2402 need to bump up the number of section headers. */
2403
2404 static int
2405 ppc_elf_additional_program_headers (bfd *abfd,
2406 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2407 {
2408 asection *s;
2409 int ret = 0;
2410
2411 s = bfd_get_section_by_name (abfd, ".sbss2");
2412 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2413 ++ret;
2414
2415 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2416 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2417 ++ret;
2418
2419 return ret;
2420 }
2421
2422 /* Modify the segment map for VLE executables. */
2423
2424 bfd_boolean
2425 ppc_elf_modify_segment_map (bfd *abfd,
2426 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2427 {
2428 struct elf_segment_map *m, *n;
2429 bfd_size_type amt;
2430 unsigned int j, k;
2431 bfd_boolean sect0_vle, sectj_vle;
2432
2433 /* At this point in the link, output sections have already been sorted by
2434 LMA and assigned to segments. All that is left to do is to ensure
2435 there is no mixing of VLE & non-VLE sections in a text segment.
2436 If we find that case, we split the segment.
2437 We maintain the original output section order. */
2438
2439 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2440 {
2441 if (m->count == 0)
2442 continue;
2443
2444 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2445 for (j = 1; j < m->count; ++j)
2446 {
2447 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2448
2449 if (sectj_vle != sect0_vle)
2450 break;
2451 }
2452 if (j >= m->count)
2453 continue;
2454
2455 /* sections 0..j-1 stay in this (current) segment,
2456 the remainder are put in a new segment.
2457 The scan resumes with the new segment. */
2458
2459 /* Fix the new segment. */
2460 amt = sizeof (struct elf_segment_map);
2461 amt += (m->count - j - 1) * sizeof (asection *);
2462 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2463 if (n == NULL)
2464 return FALSE;
2465
2466 n->p_type = PT_LOAD;
2467 n->p_flags = PF_X | PF_R;
2468 if (sectj_vle)
2469 n->p_flags |= PF_PPC_VLE;
2470 n->count = m->count - j;
2471 for (k = 0; k < n->count; ++k)
2472 {
2473 n->sections[k] = m->sections[j+k];
2474 m->sections[j+k] = NULL;
2475 }
2476 n->next = m->next;
2477 m->next = n;
2478
2479 /* Fix the current segment */
2480 m->count = j;
2481 }
2482
2483 return TRUE;
2484 }
2485
2486 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2487 .PPC.EMB.sbss0 a normal section, and not a bss section so
2488 that the linker doesn't crater when trying to make more than
2489 2 sections. */
2490
2491 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2492 {
2493 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2494 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2495 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2496 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2497 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2498 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2499 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2500 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2501 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2502 { NULL, 0, 0, 0, 0 }
2503 };
2504
2505 /* This is what we want for new plt/got. */
2506 static struct bfd_elf_special_section ppc_alt_plt =
2507 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2508
2509 static const struct bfd_elf_special_section *
2510 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2511 {
2512 const struct bfd_elf_special_section *ssect;
2513
2514 /* See if this is one of the special sections. */
2515 if (sec->name == NULL)
2516 return NULL;
2517
2518 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2519 sec->use_rela_p);
2520 if (ssect != NULL)
2521 {
2522 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2523 ssect = &ppc_alt_plt;
2524 return ssect;
2525 }
2526
2527 return _bfd_elf_get_sec_type_attr (abfd, sec);
2528 }
2529 \f
2530 /* Very simple linked list structure for recording apuinfo values. */
2531 typedef struct apuinfo_list
2532 {
2533 struct apuinfo_list *next;
2534 unsigned long value;
2535 }
2536 apuinfo_list;
2537
2538 static apuinfo_list *head;
2539 static bfd_boolean apuinfo_set;
2540
2541 static void
2542 apuinfo_list_init (void)
2543 {
2544 head = NULL;
2545 apuinfo_set = FALSE;
2546 }
2547
2548 static void
2549 apuinfo_list_add (unsigned long value)
2550 {
2551 apuinfo_list *entry = head;
2552
2553 while (entry != NULL)
2554 {
2555 if (entry->value == value)
2556 return;
2557 entry = entry->next;
2558 }
2559
2560 entry = bfd_malloc (sizeof (* entry));
2561 if (entry == NULL)
2562 return;
2563
2564 entry->value = value;
2565 entry->next = head;
2566 head = entry;
2567 }
2568
2569 static unsigned
2570 apuinfo_list_length (void)
2571 {
2572 apuinfo_list *entry;
2573 unsigned long count;
2574
2575 for (entry = head, count = 0;
2576 entry;
2577 entry = entry->next)
2578 ++ count;
2579
2580 return count;
2581 }
2582
2583 static inline unsigned long
2584 apuinfo_list_element (unsigned long number)
2585 {
2586 apuinfo_list * entry;
2587
2588 for (entry = head;
2589 entry && number --;
2590 entry = entry->next)
2591 ;
2592
2593 return entry ? entry->value : 0;
2594 }
2595
2596 static void
2597 apuinfo_list_finish (void)
2598 {
2599 apuinfo_list *entry;
2600
2601 for (entry = head; entry;)
2602 {
2603 apuinfo_list *next = entry->next;
2604 free (entry);
2605 entry = next;
2606 }
2607
2608 head = NULL;
2609 }
2610
2611 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2612 #define APUINFO_LABEL "APUinfo"
2613
2614 /* Scan the input BFDs and create a linked list of
2615 the APUinfo values that will need to be emitted. */
2616
2617 static void
2618 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2619 {
2620 bfd *ibfd;
2621 asection *asec;
2622 char *buffer = NULL;
2623 bfd_size_type largest_input_size = 0;
2624 unsigned i;
2625 unsigned long length;
2626 const char *error_message = NULL;
2627
2628 if (link_info == NULL)
2629 return;
2630
2631 apuinfo_list_init ();
2632
2633 /* Read in the input sections contents. */
2634 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2635 {
2636 unsigned long datum;
2637
2638 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2639 if (asec == NULL)
2640 continue;
2641
2642 error_message = _("corrupt %s section in %B");
2643 length = asec->size;
2644 if (length < 20)
2645 goto fail;
2646
2647 apuinfo_set = TRUE;
2648 if (largest_input_size < asec->size)
2649 {
2650 if (buffer)
2651 free (buffer);
2652 largest_input_size = asec->size;
2653 buffer = bfd_malloc (largest_input_size);
2654 if (!buffer)
2655 return;
2656 }
2657
2658 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2659 || (bfd_bread (buffer, length, ibfd) != length))
2660 {
2661 error_message = _("unable to read in %s section from %B");
2662 goto fail;
2663 }
2664
2665 /* Verify the contents of the header. Note - we have to
2666 extract the values this way in order to allow for a
2667 host whose endian-ness is different from the target. */
2668 datum = bfd_get_32 (ibfd, buffer);
2669 if (datum != sizeof APUINFO_LABEL)
2670 goto fail;
2671
2672 datum = bfd_get_32 (ibfd, buffer + 8);
2673 if (datum != 0x2)
2674 goto fail;
2675
2676 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2677 goto fail;
2678
2679 /* Get the number of bytes used for apuinfo entries. */
2680 datum = bfd_get_32 (ibfd, buffer + 4);
2681 if (datum + 20 != length)
2682 goto fail;
2683
2684 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2685 for (i = 0; i < datum; i += 4)
2686 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2687 }
2688
2689 error_message = NULL;
2690
2691 if (apuinfo_set)
2692 {
2693 /* Compute the size of the output section. */
2694 unsigned num_entries = apuinfo_list_length ();
2695
2696 /* Set the output section size, if it exists. */
2697 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2698
2699 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2700 {
2701 ibfd = abfd;
2702 error_message = _("warning: unable to set size of %s section in %B");
2703 }
2704 }
2705
2706 fail:
2707 if (buffer)
2708 free (buffer);
2709
2710 if (error_message)
2711 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2712 }
2713
2714 /* Prevent the output section from accumulating the input sections'
2715 contents. We have already stored this in our linked list structure. */
2716
2717 static bfd_boolean
2718 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2719 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2720 asection *asec,
2721 bfd_byte *contents ATTRIBUTE_UNUSED)
2722 {
2723 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2724 }
2725
2726 /* Finally we can generate the output section. */
2727
2728 static void
2729 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2730 {
2731 bfd_byte *buffer;
2732 asection *asec;
2733 unsigned i;
2734 unsigned num_entries;
2735 bfd_size_type length;
2736
2737 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2738 if (asec == NULL)
2739 return;
2740
2741 if (!apuinfo_set)
2742 return;
2743
2744 length = asec->size;
2745 if (length < 20)
2746 return;
2747
2748 buffer = bfd_malloc (length);
2749 if (buffer == NULL)
2750 {
2751 (*_bfd_error_handler)
2752 (_("failed to allocate space for new APUinfo section."));
2753 return;
2754 }
2755
2756 /* Create the apuinfo header. */
2757 num_entries = apuinfo_list_length ();
2758 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2759 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2760 bfd_put_32 (abfd, 0x2, buffer + 8);
2761 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2762
2763 length = 20;
2764 for (i = 0; i < num_entries; i++)
2765 {
2766 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2767 length += 4;
2768 }
2769
2770 if (length != asec->size)
2771 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2772
2773 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2774 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2775
2776 free (buffer);
2777
2778 apuinfo_list_finish ();
2779 }
2780 \f
2781 static bfd_boolean
2782 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2783 {
2784 bfd_byte buf[GLINK_ENTRY_SIZE];
2785
2786 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2787 return FALSE;
2788
2789 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2790 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2791 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2792 && bfd_get_32 (abfd, buf + 12) == BCTR);
2793 }
2794
2795 static bfd_boolean
2796 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2797 {
2798 bfd_vma vma = *(bfd_vma *) ptr;
2799 return ((section->flags & SEC_ALLOC) != 0
2800 && section->vma <= vma
2801 && vma < section->vma + section->size);
2802 }
2803
2804 static long
2805 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2806 long dynsymcount, asymbol **dynsyms,
2807 asymbol **ret)
2808 {
2809 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2810 asection *plt, *relplt, *dynamic, *glink;
2811 bfd_vma glink_vma = 0;
2812 bfd_vma resolv_vma = 0;
2813 bfd_vma stub_vma;
2814 asymbol *s;
2815 arelent *p;
2816 long count, i;
2817 size_t size;
2818 char *names;
2819 bfd_byte buf[4];
2820
2821 *ret = NULL;
2822
2823 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2824 return 0;
2825
2826 if (dynsymcount <= 0)
2827 return 0;
2828
2829 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2830 if (relplt == NULL)
2831 return 0;
2832
2833 plt = bfd_get_section_by_name (abfd, ".plt");
2834 if (plt == NULL)
2835 return 0;
2836
2837 /* Call common code to handle old-style executable PLTs. */
2838 if (elf_section_flags (plt) & SHF_EXECINSTR)
2839 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2840 dynsymcount, dynsyms, ret);
2841
2842 /* If this object was prelinked, the prelinker stored the address
2843 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2844 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2845 if (dynamic != NULL)
2846 {
2847 bfd_byte *dynbuf, *extdyn, *extdynend;
2848 size_t extdynsize;
2849 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2850
2851 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2852 return -1;
2853
2854 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2855 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2856
2857 extdyn = dynbuf;
2858 extdynend = extdyn + dynamic->size;
2859 for (; extdyn < extdynend; extdyn += extdynsize)
2860 {
2861 Elf_Internal_Dyn dyn;
2862 (*swap_dyn_in) (abfd, extdyn, &dyn);
2863
2864 if (dyn.d_tag == DT_NULL)
2865 break;
2866
2867 if (dyn.d_tag == DT_PPC_GOT)
2868 {
2869 unsigned int g_o_t = dyn.d_un.d_val;
2870 asection *got = bfd_get_section_by_name (abfd, ".got");
2871 if (got != NULL
2872 && bfd_get_section_contents (abfd, got, buf,
2873 g_o_t - got->vma + 4, 4))
2874 glink_vma = bfd_get_32 (abfd, buf);
2875 break;
2876 }
2877 }
2878 free (dynbuf);
2879 }
2880
2881 /* Otherwise we read the first plt entry. */
2882 if (glink_vma == 0)
2883 {
2884 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2885 glink_vma = bfd_get_32 (abfd, buf);
2886 }
2887
2888 if (glink_vma == 0)
2889 return 0;
2890
2891 /* The .glink section usually does not survive the final
2892 link; search for the section (usually .text) where the
2893 glink stubs now reside. */
2894 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2895 if (glink == NULL)
2896 return 0;
2897
2898 /* Determine glink PLT resolver by reading the relative branch
2899 from the first glink stub. */
2900 if (bfd_get_section_contents (abfd, glink, buf,
2901 glink_vma - glink->vma, 4))
2902 {
2903 unsigned int insn = bfd_get_32 (abfd, buf);
2904
2905 /* The first glink stub may either branch to the resolver ... */
2906 insn ^= B;
2907 if ((insn & ~0x3fffffc) == 0)
2908 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2909
2910 /* ... or fall through a bunch of NOPs. */
2911 else if ((insn ^ B ^ NOP) == 0)
2912 for (i = 4;
2913 bfd_get_section_contents (abfd, glink, buf,
2914 glink_vma - glink->vma + i, 4);
2915 i += 4)
2916 if (bfd_get_32 (abfd, buf) != NOP)
2917 {
2918 resolv_vma = glink_vma + i;
2919 break;
2920 }
2921 }
2922
2923 count = relplt->size / sizeof (Elf32_External_Rela);
2924 stub_vma = glink_vma - (bfd_vma) count * 16;
2925 /* If the stubs are those for -shared/-pie then we might have
2926 multiple stubs for each plt entry. If that is the case then
2927 there is no way to associate stubs with their plt entries short
2928 of figuring out the GOT pointer value used in the stub. */
2929 if (!is_nonpic_glink_stub (abfd, glink,
2930 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2931 return 0;
2932
2933 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2934 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2935 return -1;
2936
2937 size = count * sizeof (asymbol);
2938 p = relplt->relocation;
2939 for (i = 0; i < count; i++, p++)
2940 {
2941 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2942 if (p->addend != 0)
2943 size += sizeof ("+0x") - 1 + 8;
2944 }
2945
2946 size += sizeof (asymbol) + sizeof ("__glink");
2947
2948 if (resolv_vma)
2949 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2950
2951 s = *ret = bfd_malloc (size);
2952 if (s == NULL)
2953 return -1;
2954
2955 names = (char *) (s + count + 1 + (resolv_vma != 0));
2956 p = relplt->relocation;
2957 for (i = 0; i < count; i++, p++)
2958 {
2959 size_t len;
2960
2961 *s = **p->sym_ptr_ptr;
2962 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2963 we are defining a symbol, ensure one of them is set. */
2964 if ((s->flags & BSF_LOCAL) == 0)
2965 s->flags |= BSF_GLOBAL;
2966 s->flags |= BSF_SYNTHETIC;
2967 s->section = glink;
2968 s->value = stub_vma - glink->vma;
2969 s->name = names;
2970 s->udata.p = NULL;
2971 len = strlen ((*p->sym_ptr_ptr)->name);
2972 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2973 names += len;
2974 if (p->addend != 0)
2975 {
2976 memcpy (names, "+0x", sizeof ("+0x") - 1);
2977 names += sizeof ("+0x") - 1;
2978 bfd_sprintf_vma (abfd, names, p->addend);
2979 names += strlen (names);
2980 }
2981 memcpy (names, "@plt", sizeof ("@plt"));
2982 names += sizeof ("@plt");
2983 ++s;
2984 stub_vma += 16;
2985 }
2986
2987 /* Add a symbol at the start of the glink branch table. */
2988 memset (s, 0, sizeof *s);
2989 s->the_bfd = abfd;
2990 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2991 s->section = glink;
2992 s->value = glink_vma - glink->vma;
2993 s->name = names;
2994 memcpy (names, "__glink", sizeof ("__glink"));
2995 names += sizeof ("__glink");
2996 s++;
2997 count++;
2998
2999 if (resolv_vma)
3000 {
3001 /* Add a symbol for the glink PLT resolver. */
3002 memset (s, 0, sizeof *s);
3003 s->the_bfd = abfd;
3004 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3005 s->section = glink;
3006 s->value = resolv_vma - glink->vma;
3007 s->name = names;
3008 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3009 names += sizeof ("__glink_PLTresolve");
3010 s++;
3011 count++;
3012 }
3013
3014 return count;
3015 }
3016 \f
3017 /* The following functions are specific to the ELF linker, while
3018 functions above are used generally. They appear in this file more
3019 or less in the order in which they are called. eg.
3020 ppc_elf_check_relocs is called early in the link process,
3021 ppc_elf_finish_dynamic_sections is one of the last functions
3022 called. */
3023
3024 /* Track PLT entries needed for a given symbol. We might need more
3025 than one glink entry per symbol when generating a pic binary. */
3026 struct plt_entry
3027 {
3028 struct plt_entry *next;
3029
3030 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3031 This field stores the offset into .got2 used to initialise the
3032 GOT pointer reg. It will always be at least 32768. (Current
3033 gcc always uses an offset of 32768, but ld -r will pack .got2
3034 sections together resulting in larger offsets). */
3035 bfd_vma addend;
3036
3037 /* The .got2 section. */
3038 asection *sec;
3039
3040 /* PLT refcount or offset. */
3041 union
3042 {
3043 bfd_signed_vma refcount;
3044 bfd_vma offset;
3045 } plt;
3046
3047 /* .glink stub offset. */
3048 bfd_vma glink_offset;
3049 };
3050
3051 /* Of those relocs that might be copied as dynamic relocs, this function
3052 selects those that must be copied when linking a shared library,
3053 even when the symbol is local. */
3054
3055 static int
3056 must_be_dyn_reloc (struct bfd_link_info *info,
3057 enum elf_ppc_reloc_type r_type)
3058 {
3059 switch (r_type)
3060 {
3061 default:
3062 return 1;
3063
3064 case R_PPC_REL24:
3065 case R_PPC_REL14:
3066 case R_PPC_REL14_BRTAKEN:
3067 case R_PPC_REL14_BRNTAKEN:
3068 case R_PPC_REL32:
3069 return 0;
3070
3071 case R_PPC_TPREL32:
3072 case R_PPC_TPREL16:
3073 case R_PPC_TPREL16_LO:
3074 case R_PPC_TPREL16_HI:
3075 case R_PPC_TPREL16_HA:
3076 return !info->executable;
3077 }
3078 }
3079
3080 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3081 copying dynamic variables from a shared lib into an app's dynbss
3082 section, and instead use a dynamic relocation to point into the
3083 shared lib. */
3084 #define ELIMINATE_COPY_RELOCS 1
3085
3086 /* PPC ELF linker hash entry. */
3087
3088 struct ppc_elf_link_hash_entry
3089 {
3090 struct elf_link_hash_entry elf;
3091
3092 /* If this symbol is used in the linker created sections, the processor
3093 specific backend uses this field to map the field into the offset
3094 from the beginning of the section. */
3095 elf_linker_section_pointers_t *linker_section_pointer;
3096
3097 /* Track dynamic relocs copied for this symbol. */
3098 struct elf_dyn_relocs *dyn_relocs;
3099
3100 /* Contexts in which symbol is used in the GOT (or TOC).
3101 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3102 corresponding relocs are encountered during check_relocs.
3103 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3104 indicate the corresponding GOT entry type is not needed. */
3105 #define TLS_GD 1 /* GD reloc. */
3106 #define TLS_LD 2 /* LD reloc. */
3107 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3108 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3109 #define TLS_TLS 16 /* Any TLS reloc. */
3110 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3111 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3112 char tls_mask;
3113
3114 /* Nonzero if we have seen a small data relocation referring to this
3115 symbol. */
3116 unsigned char has_sda_refs;
3117 };
3118
3119 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3120
3121 /* PPC ELF linker hash table. */
3122
3123 struct ppc_elf_link_hash_table
3124 {
3125 struct elf_link_hash_table elf;
3126
3127 /* Short-cuts to get to dynamic linker sections. */
3128 asection *got;
3129 asection *relgot;
3130 asection *glink;
3131 asection *plt;
3132 asection *relplt;
3133 asection *iplt;
3134 asection *reliplt;
3135 asection *dynbss;
3136 asection *relbss;
3137 asection *dynsbss;
3138 asection *relsbss;
3139 elf_linker_section_t sdata[2];
3140 asection *sbss;
3141 asection *glink_eh_frame;
3142
3143 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3144 asection *srelplt2;
3145
3146 /* The .got.plt section (VxWorks only)*/
3147 asection *sgotplt;
3148
3149 /* Shortcut to __tls_get_addr. */
3150 struct elf_link_hash_entry *tls_get_addr;
3151
3152 /* The bfd that forced an old-style PLT. */
3153 bfd *old_bfd;
3154
3155 /* TLS local dynamic got entry handling. */
3156 union {
3157 bfd_signed_vma refcount;
3158 bfd_vma offset;
3159 } tlsld_got;
3160
3161 /* Offset of branch table to PltResolve function in glink. */
3162 bfd_vma glink_pltresolve;
3163
3164 /* Size of reserved GOT entries. */
3165 unsigned int got_header_size;
3166 /* Non-zero if allocating the header left a gap. */
3167 unsigned int got_gap;
3168
3169 /* The type of PLT we have chosen to use. */
3170 enum ppc_elf_plt_type plt_type;
3171
3172 /* Set if we should emit symbols for stubs. */
3173 unsigned int emit_stub_syms:1;
3174
3175 /* Set if __tls_get_addr optimization should not be done. */
3176 unsigned int no_tls_get_addr_opt:1;
3177
3178 /* True if the target system is VxWorks. */
3179 unsigned int is_vxworks:1;
3180
3181 /* The size of PLT entries. */
3182 int plt_entry_size;
3183 /* The distance between adjacent PLT slots. */
3184 int plt_slot_size;
3185 /* The size of the first PLT entry. */
3186 int plt_initial_entry_size;
3187
3188 /* Small local sym cache. */
3189 struct sym_cache sym_cache;
3190 };
3191
3192 /* Rename some of the generic section flags to better document how they
3193 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3194
3195 /* Nonzero if this section has TLS related relocations. */
3196 #define has_tls_reloc sec_flg0
3197
3198 /* Nonzero if this section has a call to __tls_get_addr. */
3199 #define has_tls_get_addr_call sec_flg1
3200
3201 /* Get the PPC ELF linker hash table from a link_info structure. */
3202
3203 #define ppc_elf_hash_table(p) \
3204 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3205 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3206
3207 /* Create an entry in a PPC ELF linker hash table. */
3208
3209 static struct bfd_hash_entry *
3210 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3211 struct bfd_hash_table *table,
3212 const char *string)
3213 {
3214 /* Allocate the structure if it has not already been allocated by a
3215 subclass. */
3216 if (entry == NULL)
3217 {
3218 entry = bfd_hash_allocate (table,
3219 sizeof (struct ppc_elf_link_hash_entry));
3220 if (entry == NULL)
3221 return entry;
3222 }
3223
3224 /* Call the allocation method of the superclass. */
3225 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3226 if (entry != NULL)
3227 {
3228 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3229 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3230 ppc_elf_hash_entry (entry)->tls_mask = 0;
3231 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3232 }
3233
3234 return entry;
3235 }
3236
3237 /* Create a PPC ELF linker hash table. */
3238
3239 static struct bfd_link_hash_table *
3240 ppc_elf_link_hash_table_create (bfd *abfd)
3241 {
3242 struct ppc_elf_link_hash_table *ret;
3243
3244 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3245 if (ret == NULL)
3246 return NULL;
3247
3248 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3249 ppc_elf_link_hash_newfunc,
3250 sizeof (struct ppc_elf_link_hash_entry),
3251 PPC32_ELF_DATA))
3252 {
3253 free (ret);
3254 return NULL;
3255 }
3256
3257 ret->elf.init_plt_refcount.refcount = 0;
3258 ret->elf.init_plt_refcount.glist = NULL;
3259 ret->elf.init_plt_offset.offset = 0;
3260 ret->elf.init_plt_offset.glist = NULL;
3261
3262 ret->sdata[0].name = ".sdata";
3263 ret->sdata[0].sym_name = "_SDA_BASE_";
3264 ret->sdata[0].bss_name = ".sbss";
3265
3266 ret->sdata[1].name = ".sdata2";
3267 ret->sdata[1].sym_name = "_SDA2_BASE_";
3268 ret->sdata[1].bss_name = ".sbss2";
3269
3270 ret->plt_entry_size = 12;
3271 ret->plt_slot_size = 8;
3272 ret->plt_initial_entry_size = 72;
3273
3274 return &ret->elf.root;
3275 }
3276
3277 /* Create .got and the related sections. */
3278
3279 static bfd_boolean
3280 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3281 {
3282 struct ppc_elf_link_hash_table *htab;
3283 asection *s;
3284 flagword flags;
3285
3286 if (!_bfd_elf_create_got_section (abfd, info))
3287 return FALSE;
3288
3289 htab = ppc_elf_hash_table (info);
3290 htab->got = s = bfd_get_linker_section (abfd, ".got");
3291 if (s == NULL)
3292 abort ();
3293
3294 if (htab->is_vxworks)
3295 {
3296 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3297 if (!htab->sgotplt)
3298 abort ();
3299 }
3300 else
3301 {
3302 /* The powerpc .got has a blrl instruction in it. Mark it
3303 executable. */
3304 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3305 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3306 if (!bfd_set_section_flags (abfd, s, flags))
3307 return FALSE;
3308 }
3309
3310 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3311 if (!htab->relgot)
3312 abort ();
3313
3314 return TRUE;
3315 }
3316
3317 static bfd_boolean
3318 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3319 {
3320 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3321 asection *s;
3322 flagword flags;
3323
3324 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3325 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3326 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3327 htab->glink = s;
3328 if (s == NULL
3329 || !bfd_set_section_alignment (abfd, s, 4))
3330 return FALSE;
3331
3332 if (!info->no_ld_generated_unwind_info)
3333 {
3334 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3335 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3336 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3337 htab->glink_eh_frame = s;
3338 if (s == NULL
3339 || !bfd_set_section_alignment (abfd, s, 2))
3340 return FALSE;
3341 }
3342
3343 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3344 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3345 htab->iplt = s;
3346 if (s == NULL
3347 || !bfd_set_section_alignment (abfd, s, 4))
3348 return FALSE;
3349
3350 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3351 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3352 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3353 htab->reliplt = s;
3354 if (s == NULL
3355 || ! bfd_set_section_alignment (abfd, s, 2))
3356 return FALSE;
3357 return TRUE;
3358 }
3359
3360 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3361 to output sections (just like _bfd_elf_create_dynamic_sections has
3362 to create .dynbss and .rela.bss). */
3363
3364 static bfd_boolean
3365 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3366 {
3367 struct ppc_elf_link_hash_table *htab;
3368 asection *s;
3369 flagword flags;
3370
3371 htab = ppc_elf_hash_table (info);
3372
3373 if (htab->got == NULL
3374 && !ppc_elf_create_got (abfd, info))
3375 return FALSE;
3376
3377 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3378 return FALSE;
3379
3380 if (htab->glink == NULL
3381 && !ppc_elf_create_glink (abfd, info))
3382 return FALSE;
3383
3384 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3385 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3386 SEC_ALLOC | SEC_LINKER_CREATED);
3387 htab->dynsbss = s;
3388 if (s == NULL)
3389 return FALSE;
3390
3391 if (! info->shared)
3392 {
3393 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3394 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3395 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3396 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3397 htab->relsbss = s;
3398 if (s == NULL
3399 || ! bfd_set_section_alignment (abfd, s, 2))
3400 return FALSE;
3401 }
3402
3403 if (htab->is_vxworks
3404 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3405 return FALSE;
3406
3407 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3408 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3409 if (s == NULL)
3410 abort ();
3411
3412 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3413 if (htab->plt_type == PLT_VXWORKS)
3414 /* The VxWorks PLT is a loaded section with contents. */
3415 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3416 return bfd_set_section_flags (abfd, s, flags);
3417 }
3418
3419 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3420
3421 static void
3422 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3423 struct elf_link_hash_entry *dir,
3424 struct elf_link_hash_entry *ind)
3425 {
3426 struct ppc_elf_link_hash_entry *edir, *eind;
3427
3428 edir = (struct ppc_elf_link_hash_entry *) dir;
3429 eind = (struct ppc_elf_link_hash_entry *) ind;
3430
3431 edir->tls_mask |= eind->tls_mask;
3432 edir->has_sda_refs |= eind->has_sda_refs;
3433
3434 /* If called to transfer flags for a weakdef during processing
3435 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3436 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3437 if (!(ELIMINATE_COPY_RELOCS
3438 && eind->elf.root.type != bfd_link_hash_indirect
3439 && edir->elf.dynamic_adjusted))
3440 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3441
3442 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3443 edir->elf.ref_regular |= eind->elf.ref_regular;
3444 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3445 edir->elf.needs_plt |= eind->elf.needs_plt;
3446 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3447
3448 if (eind->dyn_relocs != NULL)
3449 {
3450 if (edir->dyn_relocs != NULL)
3451 {
3452 struct elf_dyn_relocs **pp;
3453 struct elf_dyn_relocs *p;
3454
3455 /* Add reloc counts against the indirect sym to the direct sym
3456 list. Merge any entries against the same section. */
3457 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3458 {
3459 struct elf_dyn_relocs *q;
3460
3461 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3462 if (q->sec == p->sec)
3463 {
3464 q->pc_count += p->pc_count;
3465 q->count += p->count;
3466 *pp = p->next;
3467 break;
3468 }
3469 if (q == NULL)
3470 pp = &p->next;
3471 }
3472 *pp = edir->dyn_relocs;
3473 }
3474
3475 edir->dyn_relocs = eind->dyn_relocs;
3476 eind->dyn_relocs = NULL;
3477 }
3478
3479 /* If we were called to copy over info for a weak sym, that's all.
3480 You might think dyn_relocs need not be copied over; After all,
3481 both syms will be dynamic or both non-dynamic so we're just
3482 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3483 code in ppc_elf_adjust_dynamic_symbol needs to check for
3484 dyn_relocs in read-only sections, and it does so on what is the
3485 DIR sym here. */
3486 if (eind->elf.root.type != bfd_link_hash_indirect)
3487 return;
3488
3489 /* Copy over the GOT refcount entries that we may have already seen to
3490 the symbol which just became indirect. */
3491 edir->elf.got.refcount += eind->elf.got.refcount;
3492 eind->elf.got.refcount = 0;
3493
3494 /* And plt entries. */
3495 if (eind->elf.plt.plist != NULL)
3496 {
3497 if (edir->elf.plt.plist != NULL)
3498 {
3499 struct plt_entry **entp;
3500 struct plt_entry *ent;
3501
3502 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3503 {
3504 struct plt_entry *dent;
3505
3506 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3507 if (dent->sec == ent->sec && dent->addend == ent->addend)
3508 {
3509 dent->plt.refcount += ent->plt.refcount;
3510 *entp = ent->next;
3511 break;
3512 }
3513 if (dent == NULL)
3514 entp = &ent->next;
3515 }
3516 *entp = edir->elf.plt.plist;
3517 }
3518
3519 edir->elf.plt.plist = eind->elf.plt.plist;
3520 eind->elf.plt.plist = NULL;
3521 }
3522
3523 if (eind->elf.dynindx != -1)
3524 {
3525 if (edir->elf.dynindx != -1)
3526 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3527 edir->elf.dynstr_index);
3528 edir->elf.dynindx = eind->elf.dynindx;
3529 edir->elf.dynstr_index = eind->elf.dynstr_index;
3530 eind->elf.dynindx = -1;
3531 eind->elf.dynstr_index = 0;
3532 }
3533 }
3534
3535 /* Hook called by the linker routine which adds symbols from an object
3536 file. We use it to put .comm items in .sbss, and not .bss. */
3537
3538 static bfd_boolean
3539 ppc_elf_add_symbol_hook (bfd *abfd,
3540 struct bfd_link_info *info,
3541 Elf_Internal_Sym *sym,
3542 const char **namep ATTRIBUTE_UNUSED,
3543 flagword *flagsp ATTRIBUTE_UNUSED,
3544 asection **secp,
3545 bfd_vma *valp)
3546 {
3547 if (sym->st_shndx == SHN_COMMON
3548 && !info->relocatable
3549 && is_ppc_elf (info->output_bfd)
3550 && sym->st_size <= elf_gp_size (abfd))
3551 {
3552 /* Common symbols less than or equal to -G nn bytes are automatically
3553 put into .sbss. */
3554 struct ppc_elf_link_hash_table *htab;
3555
3556 htab = ppc_elf_hash_table (info);
3557 if (htab->sbss == NULL)
3558 {
3559 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3560
3561 if (!htab->elf.dynobj)
3562 htab->elf.dynobj = abfd;
3563
3564 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3565 ".sbss",
3566 flags);
3567 if (htab->sbss == NULL)
3568 return FALSE;
3569 }
3570
3571 *secp = htab->sbss;
3572 *valp = sym->st_size;
3573 }
3574
3575 if ((abfd->flags & DYNAMIC) == 0
3576 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3577 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3578 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3579
3580 return TRUE;
3581 }
3582 \f
3583 static bfd_boolean
3584 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3585 {
3586 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3587
3588 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3589 TRUE, FALSE, TRUE);
3590 if (lsect->sym == NULL)
3591 return FALSE;
3592 if (lsect->sym->root.type == bfd_link_hash_new)
3593 lsect->sym->non_elf = 0;
3594 lsect->sym->ref_regular = 1;
3595 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3596 return TRUE;
3597 }
3598
3599 /* Create a special linker section. */
3600
3601 static bfd_boolean
3602 ppc_elf_create_linker_section (bfd *abfd,
3603 struct bfd_link_info *info,
3604 flagword flags,
3605 elf_linker_section_t *lsect)
3606 {
3607 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3608 asection *s;
3609
3610 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3611 | SEC_LINKER_CREATED);
3612
3613 /* Record the first bfd that needs the special sections. */
3614 if (!htab->elf.dynobj)
3615 htab->elf.dynobj = abfd;
3616
3617 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3618 lsect->name,
3619 flags);
3620 if (s == NULL
3621 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3622 return FALSE;
3623 lsect->section = s;
3624
3625 return create_sdata_sym (info, lsect);
3626 }
3627
3628 /* Find a linker generated pointer with a given addend and type. */
3629
3630 static elf_linker_section_pointers_t *
3631 elf_find_pointer_linker_section
3632 (elf_linker_section_pointers_t *linker_pointers,
3633 bfd_vma addend,
3634 elf_linker_section_t *lsect)
3635 {
3636 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3637 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3638 return linker_pointers;
3639
3640 return NULL;
3641 }
3642
3643 /* Allocate a pointer to live in a linker created section. */
3644
3645 static bfd_boolean
3646 elf_create_pointer_linker_section (bfd *abfd,
3647 elf_linker_section_t *lsect,
3648 struct elf_link_hash_entry *h,
3649 const Elf_Internal_Rela *rel)
3650 {
3651 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3652 elf_linker_section_pointers_t *linker_section_ptr;
3653 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3654 bfd_size_type amt;
3655
3656 BFD_ASSERT (lsect != NULL);
3657
3658 /* Is this a global symbol? */
3659 if (h != NULL)
3660 {
3661 struct ppc_elf_link_hash_entry *eh;
3662
3663 /* Has this symbol already been allocated? If so, our work is done. */
3664 eh = (struct ppc_elf_link_hash_entry *) h;
3665 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3666 rel->r_addend,
3667 lsect))
3668 return TRUE;
3669
3670 ptr_linker_section_ptr = &eh->linker_section_pointer;
3671 }
3672 else
3673 {
3674 BFD_ASSERT (is_ppc_elf (abfd));
3675
3676 /* Allocation of a pointer to a local symbol. */
3677 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3678
3679 /* Allocate a table to hold the local symbols if first time. */
3680 if (!ptr)
3681 {
3682 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3683
3684 amt = num_symbols;
3685 amt *= sizeof (elf_linker_section_pointers_t *);
3686 ptr = bfd_zalloc (abfd, amt);
3687
3688 if (!ptr)
3689 return FALSE;
3690
3691 elf_local_ptr_offsets (abfd) = ptr;
3692 }
3693
3694 /* Has this symbol already been allocated? If so, our work is done. */
3695 if (elf_find_pointer_linker_section (ptr[r_symndx],
3696 rel->r_addend,
3697 lsect))
3698 return TRUE;
3699
3700 ptr_linker_section_ptr = &ptr[r_symndx];
3701 }
3702
3703 /* Allocate space for a pointer in the linker section, and allocate
3704 a new pointer record from internal memory. */
3705 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3706 amt = sizeof (elf_linker_section_pointers_t);
3707 linker_section_ptr = bfd_alloc (abfd, amt);
3708
3709 if (!linker_section_ptr)
3710 return FALSE;
3711
3712 linker_section_ptr->next = *ptr_linker_section_ptr;
3713 linker_section_ptr->addend = rel->r_addend;
3714 linker_section_ptr->lsect = lsect;
3715 *ptr_linker_section_ptr = linker_section_ptr;
3716
3717 linker_section_ptr->offset = lsect->section->size;
3718 lsect->section->size += 4;
3719
3720 #ifdef DEBUG
3721 fprintf (stderr,
3722 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3723 lsect->name, (long) linker_section_ptr->offset,
3724 (long) lsect->section->size);
3725 #endif
3726
3727 return TRUE;
3728 }
3729
3730 static struct plt_entry **
3731 update_local_sym_info (bfd *abfd,
3732 Elf_Internal_Shdr *symtab_hdr,
3733 unsigned long r_symndx,
3734 int tls_type)
3735 {
3736 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3737 struct plt_entry **local_plt;
3738 char *local_got_tls_masks;
3739
3740 if (local_got_refcounts == NULL)
3741 {
3742 bfd_size_type size = symtab_hdr->sh_info;
3743
3744 size *= (sizeof (*local_got_refcounts)
3745 + sizeof (*local_plt)
3746 + sizeof (*local_got_tls_masks));
3747 local_got_refcounts = bfd_zalloc (abfd, size);
3748 if (local_got_refcounts == NULL)
3749 return NULL;
3750 elf_local_got_refcounts (abfd) = local_got_refcounts;
3751 }
3752
3753 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3754 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3755 local_got_tls_masks[r_symndx] |= tls_type;
3756 if (tls_type != PLT_IFUNC)
3757 local_got_refcounts[r_symndx] += 1;
3758 return local_plt + r_symndx;
3759 }
3760
3761 static bfd_boolean
3762 update_plt_info (bfd *abfd, struct plt_entry **plist,
3763 asection *sec, bfd_vma addend)
3764 {
3765 struct plt_entry *ent;
3766
3767 if (addend < 32768)
3768 sec = NULL;
3769 for (ent = *plist; ent != NULL; ent = ent->next)
3770 if (ent->sec == sec && ent->addend == addend)
3771 break;
3772 if (ent == NULL)
3773 {
3774 bfd_size_type amt = sizeof (*ent);
3775 ent = bfd_alloc (abfd, amt);
3776 if (ent == NULL)
3777 return FALSE;
3778 ent->next = *plist;
3779 ent->sec = sec;
3780 ent->addend = addend;
3781 ent->plt.refcount = 0;
3782 *plist = ent;
3783 }
3784 ent->plt.refcount += 1;
3785 return TRUE;
3786 }
3787
3788 static struct plt_entry *
3789 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3790 {
3791 struct plt_entry *ent;
3792
3793 if (addend < 32768)
3794 sec = NULL;
3795 for (ent = *plist; ent != NULL; ent = ent->next)
3796 if (ent->sec == sec && ent->addend == addend)
3797 break;
3798 return ent;
3799 }
3800
3801 static bfd_boolean
3802 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3803 {
3804 return (r_type == R_PPC_PLTREL24
3805 || r_type == R_PPC_LOCAL24PC
3806 || r_type == R_PPC_REL24
3807 || r_type == R_PPC_REL14
3808 || r_type == R_PPC_REL14_BRTAKEN
3809 || r_type == R_PPC_REL14_BRNTAKEN
3810 || r_type == R_PPC_ADDR24
3811 || r_type == R_PPC_ADDR14
3812 || r_type == R_PPC_ADDR14_BRTAKEN
3813 || r_type == R_PPC_ADDR14_BRNTAKEN);
3814 }
3815
3816 static void
3817 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3818 {
3819 (*_bfd_error_handler)
3820 (_("%B: relocation %s cannot be used when making a shared object"),
3821 abfd,
3822 ppc_elf_howto_table[r_type]->name);
3823 bfd_set_error (bfd_error_bad_value);
3824 }
3825
3826 /* Look through the relocs for a section during the first phase, and
3827 allocate space in the global offset table or procedure linkage
3828 table. */
3829
3830 static bfd_boolean
3831 ppc_elf_check_relocs (bfd *abfd,
3832 struct bfd_link_info *info,
3833 asection *sec,
3834 const Elf_Internal_Rela *relocs)
3835 {
3836 struct ppc_elf_link_hash_table *htab;
3837 Elf_Internal_Shdr *symtab_hdr;
3838 struct elf_link_hash_entry **sym_hashes;
3839 const Elf_Internal_Rela *rel;
3840 const Elf_Internal_Rela *rel_end;
3841 asection *got2, *sreloc;
3842 struct elf_link_hash_entry *tga;
3843
3844 if (info->relocatable)
3845 return TRUE;
3846
3847 /* Don't do anything special with non-loaded, non-alloced sections.
3848 In particular, any relocs in such sections should not affect GOT
3849 and PLT reference counting (ie. we don't allow them to create GOT
3850 or PLT entries), there's no possibility or desire to optimize TLS
3851 relocs, and there's not much point in propagating relocs to shared
3852 libs that the dynamic linker won't relocate. */
3853 if ((sec->flags & SEC_ALLOC) == 0)
3854 return TRUE;
3855
3856 #ifdef DEBUG
3857 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3858 sec, abfd);
3859 #endif
3860
3861 BFD_ASSERT (is_ppc_elf (abfd));
3862
3863 /* Initialize howto table if not already done. */
3864 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3865 ppc_elf_howto_init ();
3866
3867 htab = ppc_elf_hash_table (info);
3868 if (htab->glink == NULL)
3869 {
3870 if (htab->elf.dynobj == NULL)
3871 htab->elf.dynobj = abfd;
3872 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3873 return FALSE;
3874 }
3875 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3876 FALSE, FALSE, TRUE);
3877 symtab_hdr = &elf_symtab_hdr (abfd);
3878 sym_hashes = elf_sym_hashes (abfd);
3879 got2 = bfd_get_section_by_name (abfd, ".got2");
3880 sreloc = NULL;
3881
3882 rel_end = relocs + sec->reloc_count;
3883 for (rel = relocs; rel < rel_end; rel++)
3884 {
3885 unsigned long r_symndx;
3886 enum elf_ppc_reloc_type r_type;
3887 struct elf_link_hash_entry *h;
3888 int tls_type;
3889
3890 r_symndx = ELF32_R_SYM (rel->r_info);
3891 if (r_symndx < symtab_hdr->sh_info)
3892 h = NULL;
3893 else
3894 {
3895 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3896 while (h->root.type == bfd_link_hash_indirect
3897 || h->root.type == bfd_link_hash_warning)
3898 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3899 }
3900
3901 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3902 This shows up in particular in an R_PPC_ADDR32 in the eabi
3903 startup code. */
3904 if (h != NULL
3905 && htab->got == NULL
3906 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3907 {
3908 if (htab->elf.dynobj == NULL)
3909 htab->elf.dynobj = abfd;
3910 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3911 return FALSE;
3912 BFD_ASSERT (h == htab->elf.hgot);
3913 }
3914
3915 tls_type = 0;
3916 r_type = ELF32_R_TYPE (rel->r_info);
3917 if (h == NULL && !htab->is_vxworks)
3918 {
3919 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3920 abfd, r_symndx);
3921 if (isym == NULL)
3922 return FALSE;
3923
3924 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3925 {
3926 struct plt_entry **ifunc;
3927
3928 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3929 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3930 PLT_IFUNC);
3931 if (ifunc == NULL)
3932 return FALSE;
3933
3934 /* STT_GNU_IFUNC symbols must have a PLT entry;
3935 In a non-pie executable even when there are
3936 no plt calls. */
3937 if (!info->shared
3938 || is_branch_reloc (r_type))
3939 {
3940 bfd_vma addend = 0;
3941 if (r_type == R_PPC_PLTREL24)
3942 {
3943 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3944 if (info->shared)
3945 addend = rel->r_addend;
3946 }
3947 if (!update_plt_info (abfd, ifunc, got2, addend))
3948 return FALSE;
3949 }
3950 }
3951 }
3952
3953 if (!htab->is_vxworks
3954 && is_branch_reloc (r_type)
3955 && h != NULL
3956 && h == tga)
3957 {
3958 if (rel != relocs
3959 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3960 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3961 /* We have a new-style __tls_get_addr call with a marker
3962 reloc. */
3963 ;
3964 else
3965 /* Mark this section as having an old-style call. */
3966 sec->has_tls_get_addr_call = 1;
3967 }
3968
3969 switch (r_type)
3970 {
3971 case R_PPC_TLSGD:
3972 case R_PPC_TLSLD:
3973 /* These special tls relocs tie a call to __tls_get_addr with
3974 its parameter symbol. */
3975 break;
3976
3977 case R_PPC_GOT_TLSLD16:
3978 case R_PPC_GOT_TLSLD16_LO:
3979 case R_PPC_GOT_TLSLD16_HI:
3980 case R_PPC_GOT_TLSLD16_HA:
3981 tls_type = TLS_TLS | TLS_LD;
3982 goto dogottls;
3983
3984 case R_PPC_GOT_TLSGD16:
3985 case R_PPC_GOT_TLSGD16_LO:
3986 case R_PPC_GOT_TLSGD16_HI:
3987 case R_PPC_GOT_TLSGD16_HA:
3988 tls_type = TLS_TLS | TLS_GD;
3989 goto dogottls;
3990
3991 case R_PPC_GOT_TPREL16:
3992 case R_PPC_GOT_TPREL16_LO:
3993 case R_PPC_GOT_TPREL16_HI:
3994 case R_PPC_GOT_TPREL16_HA:
3995 if (!info->executable)
3996 info->flags |= DF_STATIC_TLS;
3997 tls_type = TLS_TLS | TLS_TPREL;
3998 goto dogottls;
3999
4000 case R_PPC_GOT_DTPREL16:
4001 case R_PPC_GOT_DTPREL16_LO:
4002 case R_PPC_GOT_DTPREL16_HI:
4003 case R_PPC_GOT_DTPREL16_HA:
4004 tls_type = TLS_TLS | TLS_DTPREL;
4005 dogottls:
4006 sec->has_tls_reloc = 1;
4007 /* Fall thru */
4008
4009 /* GOT16 relocations */
4010 case R_PPC_GOT16:
4011 case R_PPC_GOT16_LO:
4012 case R_PPC_GOT16_HI:
4013 case R_PPC_GOT16_HA:
4014 /* This symbol requires a global offset table entry. */
4015 if (htab->got == NULL)
4016 {
4017 if (htab->elf.dynobj == NULL)
4018 htab->elf.dynobj = abfd;
4019 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4020 return FALSE;
4021 }
4022 if (h != NULL)
4023 {
4024 h->got.refcount += 1;
4025 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4026 }
4027 else
4028 /* This is a global offset table entry for a local symbol. */
4029 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4030 return FALSE;
4031
4032 /* We may also need a plt entry if the symbol turns out to be
4033 an ifunc. */
4034 if (h != NULL && !info->shared)
4035 {
4036 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4037 return FALSE;
4038 }
4039 break;
4040
4041 /* Indirect .sdata relocation. */
4042 case R_PPC_EMB_SDAI16:
4043 if (info->shared)
4044 {
4045 bad_shared_reloc (abfd, r_type);
4046 return FALSE;
4047 }
4048 if (htab->sdata[0].section == NULL
4049 && !ppc_elf_create_linker_section (abfd, info, 0,
4050 &htab->sdata[0]))
4051 return FALSE;
4052 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
4053 h, rel))
4054 return FALSE;
4055 if (h != NULL)
4056 {
4057 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4058 h->non_got_ref = TRUE;
4059 }
4060 break;
4061
4062 /* Indirect .sdata2 relocation. */
4063 case R_PPC_EMB_SDA2I16:
4064 if (info->shared)
4065 {
4066 bad_shared_reloc (abfd, r_type);
4067 return FALSE;
4068 }
4069 if (htab->sdata[1].section == NULL
4070 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
4071 &htab->sdata[1]))
4072 return FALSE;
4073 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
4074 h, rel))
4075 return FALSE;
4076 if (h != NULL)
4077 {
4078 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4079 h->non_got_ref = TRUE;
4080 }
4081 break;
4082
4083 case R_PPC_VLE_SDAREL_LO16A:
4084 case R_PPC_VLE_SDAREL_LO16D:
4085 case R_PPC_VLE_SDAREL_HI16A:
4086 case R_PPC_VLE_SDAREL_HI16D:
4087 case R_PPC_VLE_SDAREL_HA16A:
4088 case R_PPC_VLE_SDAREL_HA16D:
4089 case R_PPC_SDAREL16:
4090 if (htab->sdata[0].sym == NULL
4091 && !create_sdata_sym (info, &htab->sdata[0]))
4092 return FALSE;
4093
4094 if (htab->sdata[1].sym == NULL
4095 && !create_sdata_sym (info, &htab->sdata[1]))
4096 return FALSE;
4097
4098 if (h != NULL)
4099 {
4100 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4101 h->non_got_ref = TRUE;
4102 }
4103 break;
4104
4105 case R_PPC_VLE_REL8:
4106 case R_PPC_VLE_REL15:
4107 case R_PPC_VLE_REL24:
4108 case R_PPC_VLE_LO16A:
4109 case R_PPC_VLE_LO16D:
4110 case R_PPC_VLE_HI16A:
4111 case R_PPC_VLE_HI16D:
4112 case R_PPC_VLE_HA16A:
4113 case R_PPC_VLE_HA16D:
4114 break;
4115
4116 case R_PPC_EMB_SDA2REL:
4117 if (info->shared)
4118 {
4119 bad_shared_reloc (abfd, r_type);
4120 return FALSE;
4121 }
4122 if (htab->sdata[1].sym == NULL
4123 && !create_sdata_sym (info, &htab->sdata[1]))
4124 return FALSE;
4125 if (h != NULL)
4126 {
4127 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4128 h->non_got_ref = TRUE;
4129 }
4130 break;
4131
4132 case R_PPC_VLE_SDA21_LO:
4133 case R_PPC_VLE_SDA21:
4134 case R_PPC_EMB_SDA21:
4135 case R_PPC_EMB_RELSDA:
4136 if (info->shared)
4137 {
4138 bad_shared_reloc (abfd, r_type);
4139 return FALSE;
4140 }
4141 if (htab->sdata[0].sym == NULL
4142 && !create_sdata_sym (info, &htab->sdata[0]))
4143 return FALSE;
4144 if (htab->sdata[1].sym == NULL
4145 && !create_sdata_sym (info, &htab->sdata[1]))
4146 return FALSE;
4147 if (h != NULL)
4148 {
4149 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4150 h->non_got_ref = TRUE;
4151 }
4152 break;
4153
4154 case R_PPC_EMB_NADDR32:
4155 case R_PPC_EMB_NADDR16:
4156 case R_PPC_EMB_NADDR16_LO:
4157 case R_PPC_EMB_NADDR16_HI:
4158 case R_PPC_EMB_NADDR16_HA:
4159 if (info->shared)
4160 {
4161 bad_shared_reloc (abfd, r_type);
4162 return FALSE;
4163 }
4164 if (h != NULL)
4165 h->non_got_ref = TRUE;
4166 break;
4167
4168 case R_PPC_PLTREL24:
4169 if (h == NULL)
4170 break;
4171 /* Fall through */
4172 case R_PPC_PLT32:
4173 case R_PPC_PLTREL32:
4174 case R_PPC_PLT16_LO:
4175 case R_PPC_PLT16_HI:
4176 case R_PPC_PLT16_HA:
4177 #ifdef DEBUG
4178 fprintf (stderr, "Reloc requires a PLT entry\n");
4179 #endif
4180 /* This symbol requires a procedure linkage table entry. We
4181 actually build the entry in finish_dynamic_symbol,
4182 because this might be a case of linking PIC code without
4183 linking in any dynamic objects, in which case we don't
4184 need to generate a procedure linkage table after all. */
4185
4186 if (h == NULL)
4187 {
4188 /* It does not make sense to have a procedure linkage
4189 table entry for a local symbol. */
4190 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4191 abfd, sec, rel->r_offset,
4192 ppc_elf_howto_table[r_type]->name);
4193 bfd_set_error (bfd_error_bad_value);
4194 return FALSE;
4195 }
4196 else
4197 {
4198 bfd_vma addend = 0;
4199
4200 if (r_type == R_PPC_PLTREL24)
4201 {
4202 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4203 if (info->shared)
4204 addend = rel->r_addend;
4205 }
4206 h->needs_plt = 1;
4207 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4208 return FALSE;
4209 }
4210 break;
4211
4212 /* The following relocations don't need to propagate the
4213 relocation if linking a shared object since they are
4214 section relative. */
4215 case R_PPC_SECTOFF:
4216 case R_PPC_SECTOFF_LO:
4217 case R_PPC_SECTOFF_HI:
4218 case R_PPC_SECTOFF_HA:
4219 case R_PPC_DTPREL16:
4220 case R_PPC_DTPREL16_LO:
4221 case R_PPC_DTPREL16_HI:
4222 case R_PPC_DTPREL16_HA:
4223 case R_PPC_TOC16:
4224 break;
4225
4226 case R_PPC_REL16:
4227 case R_PPC_REL16_LO:
4228 case R_PPC_REL16_HI:
4229 case R_PPC_REL16_HA:
4230 ppc_elf_tdata (abfd)->has_rel16 = 1;
4231 break;
4232
4233 /* These are just markers. */
4234 case R_PPC_TLS:
4235 case R_PPC_EMB_MRKREF:
4236 case R_PPC_NONE:
4237 case R_PPC_max:
4238 case R_PPC_RELAX:
4239 case R_PPC_RELAX_PLT:
4240 case R_PPC_RELAX_PLTREL24:
4241 break;
4242
4243 /* These should only appear in dynamic objects. */
4244 case R_PPC_COPY:
4245 case R_PPC_GLOB_DAT:
4246 case R_PPC_JMP_SLOT:
4247 case R_PPC_RELATIVE:
4248 case R_PPC_IRELATIVE:
4249 break;
4250
4251 /* These aren't handled yet. We'll report an error later. */
4252 case R_PPC_ADDR30:
4253 case R_PPC_EMB_RELSEC16:
4254 case R_PPC_EMB_RELST_LO:
4255 case R_PPC_EMB_RELST_HI:
4256 case R_PPC_EMB_RELST_HA:
4257 case R_PPC_EMB_BIT_FLD:
4258 break;
4259
4260 /* This refers only to functions defined in the shared library. */
4261 case R_PPC_LOCAL24PC:
4262 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4263 {
4264 htab->plt_type = PLT_OLD;
4265 htab->old_bfd = abfd;
4266 }
4267 break;
4268
4269 /* This relocation describes the C++ object vtable hierarchy.
4270 Reconstruct it for later use during GC. */
4271 case R_PPC_GNU_VTINHERIT:
4272 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4273 return FALSE;
4274 break;
4275
4276 /* This relocation describes which C++ vtable entries are actually
4277 used. Record for later use during GC. */
4278 case R_PPC_GNU_VTENTRY:
4279 BFD_ASSERT (h != NULL);
4280 if (h != NULL
4281 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4282 return FALSE;
4283 break;
4284
4285 /* We shouldn't really be seeing these. */
4286 case R_PPC_TPREL32:
4287 case R_PPC_TPREL16:
4288 case R_PPC_TPREL16_LO:
4289 case R_PPC_TPREL16_HI:
4290 case R_PPC_TPREL16_HA:
4291 if (!info->executable)
4292 info->flags |= DF_STATIC_TLS;
4293 goto dodyn;
4294
4295 /* Nor these. */
4296 case R_PPC_DTPMOD32:
4297 case R_PPC_DTPREL32:
4298 goto dodyn;
4299
4300 case R_PPC_REL32:
4301 if (h == NULL
4302 && got2 != NULL
4303 && (sec->flags & SEC_CODE) != 0
4304 && info->shared
4305 && htab->plt_type == PLT_UNSET)
4306 {
4307 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4308 the start of a function, which assembles to a REL32
4309 reference to .got2. If we detect one of these, then
4310 force the old PLT layout because the linker cannot
4311 reliably deduce the GOT pointer value needed for
4312 PLT call stubs. */
4313 asection *s;
4314 Elf_Internal_Sym *isym;
4315
4316 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4317 abfd, r_symndx);
4318 if (isym == NULL)
4319 return FALSE;
4320
4321 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4322 if (s == got2)
4323 {
4324 htab->plt_type = PLT_OLD;
4325 htab->old_bfd = abfd;
4326 }
4327 }
4328 if (h == NULL || h == htab->elf.hgot)
4329 break;
4330 /* fall through */
4331
4332 case R_PPC_ADDR32:
4333 case R_PPC_ADDR16:
4334 case R_PPC_ADDR16_LO:
4335 case R_PPC_ADDR16_HI:
4336 case R_PPC_ADDR16_HA:
4337 case R_PPC_UADDR32:
4338 case R_PPC_UADDR16:
4339 if (h != NULL && !info->shared)
4340 {
4341 /* We may need a plt entry if the symbol turns out to be
4342 a function defined in a dynamic object. */
4343 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4344 return FALSE;
4345
4346 /* We may need a copy reloc too. */
4347 h->non_got_ref = 1;
4348 h->pointer_equality_needed = 1;
4349 }
4350 goto dodyn;
4351
4352 case R_PPC_REL24:
4353 case R_PPC_REL14:
4354 case R_PPC_REL14_BRTAKEN:
4355 case R_PPC_REL14_BRNTAKEN:
4356 if (h == NULL)
4357 break;
4358 if (h == htab->elf.hgot)
4359 {
4360 if (htab->plt_type == PLT_UNSET)
4361 {
4362 htab->plt_type = PLT_OLD;
4363 htab->old_bfd = abfd;
4364 }
4365 break;
4366 }
4367 /* fall through */
4368
4369 case R_PPC_ADDR24:
4370 case R_PPC_ADDR14:
4371 case R_PPC_ADDR14_BRTAKEN:
4372 case R_PPC_ADDR14_BRNTAKEN:
4373 if (h != NULL && !info->shared)
4374 {
4375 /* We may need a plt entry if the symbol turns out to be
4376 a function defined in a dynamic object. */
4377 h->needs_plt = 1;
4378 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4379 return FALSE;
4380 break;
4381 }
4382
4383 dodyn:
4384 /* If we are creating a shared library, and this is a reloc
4385 against a global symbol, or a non PC relative reloc
4386 against a local symbol, then we need to copy the reloc
4387 into the shared library. However, if we are linking with
4388 -Bsymbolic, we do not need to copy a reloc against a
4389 global symbol which is defined in an object we are
4390 including in the link (i.e., DEF_REGULAR is set). At
4391 this point we have not seen all the input files, so it is
4392 possible that DEF_REGULAR is not set now but will be set
4393 later (it is never cleared). In case of a weak definition,
4394 DEF_REGULAR may be cleared later by a strong definition in
4395 a shared library. We account for that possibility below by
4396 storing information in the dyn_relocs field of the hash
4397 table entry. A similar situation occurs when creating
4398 shared libraries and symbol visibility changes render the
4399 symbol local.
4400
4401 If on the other hand, we are creating an executable, we
4402 may need to keep relocations for symbols satisfied by a
4403 dynamic library if we manage to avoid copy relocs for the
4404 symbol. */
4405 if ((info->shared
4406 && (must_be_dyn_reloc (info, r_type)
4407 || (h != NULL
4408 && (! info->symbolic
4409 || h->root.type == bfd_link_hash_defweak
4410 || !h->def_regular))))
4411 || (ELIMINATE_COPY_RELOCS
4412 && !info->shared
4413 && h != NULL
4414 && (h->root.type == bfd_link_hash_defweak
4415 || !h->def_regular)))
4416 {
4417 struct elf_dyn_relocs *p;
4418 struct elf_dyn_relocs **rel_head;
4419
4420 #ifdef DEBUG
4421 fprintf (stderr,
4422 "ppc_elf_check_relocs needs to "
4423 "create relocation for %s\n",
4424 (h && h->root.root.string
4425 ? h->root.root.string : "<unknown>"));
4426 #endif
4427 if (sreloc == NULL)
4428 {
4429 if (htab->elf.dynobj == NULL)
4430 htab->elf.dynobj = abfd;
4431
4432 sreloc = _bfd_elf_make_dynamic_reloc_section
4433 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4434
4435 if (sreloc == NULL)
4436 return FALSE;
4437 }
4438
4439 /* If this is a global symbol, we count the number of
4440 relocations we need for this symbol. */
4441 if (h != NULL)
4442 {
4443 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4444 }
4445 else
4446 {
4447 /* Track dynamic relocs needed for local syms too.
4448 We really need local syms available to do this
4449 easily. Oh well. */
4450 asection *s;
4451 void *vpp;
4452 Elf_Internal_Sym *isym;
4453
4454 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4455 abfd, r_symndx);
4456 if (isym == NULL)
4457 return FALSE;
4458
4459 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4460 if (s == NULL)
4461 s = sec;
4462
4463 vpp = &elf_section_data (s)->local_dynrel;
4464 rel_head = (struct elf_dyn_relocs **) vpp;
4465 }
4466
4467 p = *rel_head;
4468 if (p == NULL || p->sec != sec)
4469 {
4470 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4471 if (p == NULL)
4472 return FALSE;
4473 p->next = *rel_head;
4474 *rel_head = p;
4475 p->sec = sec;
4476 p->count = 0;
4477 p->pc_count = 0;
4478 }
4479
4480 p->count += 1;
4481 if (!must_be_dyn_reloc (info, r_type))
4482 p->pc_count += 1;
4483 }
4484
4485 break;
4486 }
4487 }
4488
4489 return TRUE;
4490 }
4491 \f
4492
4493 /* Merge object attributes from IBFD into OBFD. Raise an error if
4494 there are conflicting attributes. */
4495 static bfd_boolean
4496 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4497 {
4498 obj_attribute *in_attr, *in_attrs;
4499 obj_attribute *out_attr, *out_attrs;
4500
4501 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4502 {
4503 /* This is the first object. Copy the attributes. */
4504 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4505
4506 /* Use the Tag_null value to indicate the attributes have been
4507 initialized. */
4508 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4509
4510 return TRUE;
4511 }
4512
4513 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4514 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4515
4516 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4517 non-conflicting ones. */
4518 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4519 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4520 if (in_attr->i != out_attr->i)
4521 {
4522 out_attr->type = 1;
4523 if (out_attr->i == 0)
4524 out_attr->i = in_attr->i;
4525 else if (in_attr->i == 0)
4526 ;
4527 else if (out_attr->i == 1 && in_attr->i == 2)
4528 _bfd_error_handler
4529 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4530 else if (out_attr->i == 1 && in_attr->i == 3)
4531 _bfd_error_handler
4532 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4533 obfd, ibfd);
4534 else if (out_attr->i == 3 && in_attr->i == 1)
4535 _bfd_error_handler
4536 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4537 ibfd, obfd);
4538 else if (out_attr->i == 3 && in_attr->i == 2)
4539 _bfd_error_handler
4540 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4541 ibfd, obfd);
4542 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4543 _bfd_error_handler
4544 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4545 else if (in_attr->i > 3)
4546 _bfd_error_handler
4547 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4548 in_attr->i);
4549 else
4550 _bfd_error_handler
4551 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4552 out_attr->i);
4553 }
4554
4555 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4556 merge non-conflicting ones. */
4557 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4558 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4559 if (in_attr->i != out_attr->i)
4560 {
4561 const char *in_abi = NULL, *out_abi = NULL;
4562
4563 switch (in_attr->i)
4564 {
4565 case 1: in_abi = "generic"; break;
4566 case 2: in_abi = "AltiVec"; break;
4567 case 3: in_abi = "SPE"; break;
4568 }
4569
4570 switch (out_attr->i)
4571 {
4572 case 1: out_abi = "generic"; break;
4573 case 2: out_abi = "AltiVec"; break;
4574 case 3: out_abi = "SPE"; break;
4575 }
4576
4577 out_attr->type = 1;
4578 if (out_attr->i == 0)
4579 out_attr->i = in_attr->i;
4580 else if (in_attr->i == 0)
4581 ;
4582 /* For now, allow generic to transition to AltiVec or SPE
4583 without a warning. If GCC marked files with their stack
4584 alignment and used don't-care markings for files which are
4585 not affected by the vector ABI, we could warn about this
4586 case too. */
4587 else if (out_attr->i == 1)
4588 out_attr->i = in_attr->i;
4589 else if (in_attr->i == 1)
4590 ;
4591 else if (in_abi == NULL)
4592 _bfd_error_handler
4593 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4594 in_attr->i);
4595 else if (out_abi == NULL)
4596 _bfd_error_handler
4597 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4598 in_attr->i);
4599 else
4600 _bfd_error_handler
4601 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4602 ibfd, obfd, in_abi, out_abi);
4603 }
4604
4605 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4606 and merge non-conflicting ones. */
4607 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4608 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4609 if (in_attr->i != out_attr->i)
4610 {
4611 out_attr->type = 1;
4612 if (out_attr->i == 0)
4613 out_attr->i = in_attr->i;
4614 else if (in_attr->i == 0)
4615 ;
4616 else if (out_attr->i == 1 && in_attr->i == 2)
4617 _bfd_error_handler
4618 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4619 else if (out_attr->i == 2 && in_attr->i == 1)
4620 _bfd_error_handler
4621 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4622 else if (in_attr->i > 2)
4623 _bfd_error_handler
4624 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4625 in_attr->i);
4626 else
4627 _bfd_error_handler
4628 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4629 out_attr->i);
4630 }
4631
4632 /* Merge Tag_compatibility attributes and any common GNU ones. */
4633 _bfd_elf_merge_object_attributes (ibfd, obfd);
4634
4635 return TRUE;
4636 }
4637
4638 /* Merge backend specific data from an object file to the output
4639 object file when linking. */
4640
4641 static bfd_boolean
4642 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4643 {
4644 flagword old_flags;
4645 flagword new_flags;
4646 bfd_boolean error;
4647
4648 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4649 return TRUE;
4650
4651 /* Check if we have the same endianness. */
4652 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4653 return FALSE;
4654
4655 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4656 return FALSE;
4657
4658 new_flags = elf_elfheader (ibfd)->e_flags;
4659 old_flags = elf_elfheader (obfd)->e_flags;
4660 if (!elf_flags_init (obfd))
4661 {
4662 /* First call, no flags set. */
4663 elf_flags_init (obfd) = TRUE;
4664 elf_elfheader (obfd)->e_flags = new_flags;
4665 }
4666
4667 /* Compatible flags are ok. */
4668 else if (new_flags == old_flags)
4669 ;
4670
4671 /* Incompatible flags. */
4672 else
4673 {
4674 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4675 to be linked with either. */
4676 error = FALSE;
4677 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4678 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4679 {
4680 error = TRUE;
4681 (*_bfd_error_handler)
4682 (_("%B: compiled with -mrelocatable and linked with "
4683 "modules compiled normally"), ibfd);
4684 }
4685 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4686 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4687 {
4688 error = TRUE;
4689 (*_bfd_error_handler)
4690 (_("%B: compiled normally and linked with "
4691 "modules compiled with -mrelocatable"), ibfd);
4692 }
4693
4694 /* The output is -mrelocatable-lib iff both the input files are. */
4695 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4696 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4697
4698 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4699 but each input file is either -mrelocatable or -mrelocatable-lib. */
4700 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4701 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4702 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4703 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4704
4705 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4706 any module uses it. */
4707 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4708
4709 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4710 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4711
4712 /* Warn about any other mismatches. */
4713 if (new_flags != old_flags)
4714 {
4715 error = TRUE;
4716 (*_bfd_error_handler)
4717 (_("%B: uses different e_flags (0x%lx) fields "
4718 "than previous modules (0x%lx)"),
4719 ibfd, (long) new_flags, (long) old_flags);
4720 }
4721
4722 if (error)
4723 {
4724 bfd_set_error (bfd_error_bad_value);
4725 return FALSE;
4726 }
4727 }
4728
4729 return TRUE;
4730 }
4731
4732 static void
4733 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *contents,
4734 bfd_vma offset, bfd_vma relocation,
4735 split16_format_type split16_format)
4736
4737 {
4738 bfd_vma insn, top5, bottom11;
4739
4740 insn = bfd_get_32 (output_bfd, contents + offset);
4741 top5 = relocation >> 11;
4742 top5 = top5 << (split16_format == split16a_type ? 20 : 16);
4743 bottom11 = relocation & 0x7ff;
4744 insn |= top5;
4745 insn |= bottom11;
4746 bfd_put_32 (output_bfd, insn, contents + offset);
4747 }
4748
4749 \f
4750 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4751 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4752 int
4753 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4754 struct bfd_link_info *info,
4755 enum ppc_elf_plt_type plt_style,
4756 int emit_stub_syms)
4757 {
4758 struct ppc_elf_link_hash_table *htab;
4759 flagword flags;
4760
4761 htab = ppc_elf_hash_table (info);
4762
4763 htab->emit_stub_syms = emit_stub_syms;
4764
4765 if (htab->plt_type == PLT_UNSET)
4766 {
4767 struct elf_link_hash_entry *h;
4768
4769 if (plt_style == PLT_OLD)
4770 htab->plt_type = PLT_OLD;
4771 else if (info->shared
4772 && htab->elf.dynamic_sections_created
4773 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4774 FALSE, FALSE, TRUE)) != NULL
4775 && (h->type == STT_FUNC
4776 || h->needs_plt)
4777 && h->ref_regular
4778 && !(SYMBOL_CALLS_LOCAL (info, h)
4779 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4780 && h->root.type == bfd_link_hash_undefweak)))
4781 {
4782 /* Profiling of shared libs (and pies) is not supported with
4783 secure plt, because ppc32 does profiling before a
4784 function prologue and a secure plt pic call stubs needs
4785 r30 to be set up. */
4786 htab->plt_type = PLT_OLD;
4787 }
4788 else
4789 {
4790 bfd *ibfd;
4791 enum ppc_elf_plt_type plt_type = plt_style;
4792
4793 /* Look through the reloc flags left by ppc_elf_check_relocs.
4794 Use the old style bss plt if a file makes plt calls
4795 without using the new relocs, and if ld isn't given
4796 --secure-plt and we never see REL16 relocs. */
4797 if (plt_type == PLT_UNSET)
4798 plt_type = PLT_OLD;
4799 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4800 if (is_ppc_elf (ibfd))
4801 {
4802 if (ppc_elf_tdata (ibfd)->has_rel16)
4803 plt_type = PLT_NEW;
4804 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4805 {
4806 plt_type = PLT_OLD;
4807 htab->old_bfd = ibfd;
4808 break;
4809 }
4810 }
4811 htab->plt_type = plt_type;
4812 }
4813 }
4814 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4815 {
4816 if (htab->old_bfd != NULL)
4817 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4818 htab->old_bfd);
4819 else
4820 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4821 }
4822
4823 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4824
4825 if (htab->plt_type == PLT_NEW)
4826 {
4827 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4828 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4829
4830 /* The new PLT is a loaded section. */
4831 if (htab->plt != NULL
4832 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4833 return -1;
4834
4835 /* The new GOT is not executable. */
4836 if (htab->got != NULL
4837 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4838 return -1;
4839 }
4840 else
4841 {
4842 /* Stop an unused .glink section from affecting .text alignment. */
4843 if (htab->glink != NULL
4844 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4845 return -1;
4846 }
4847 return htab->plt_type == PLT_NEW;
4848 }
4849 \f
4850 /* Return the section that should be marked against GC for a given
4851 relocation. */
4852
4853 static asection *
4854 ppc_elf_gc_mark_hook (asection *sec,
4855 struct bfd_link_info *info,
4856 Elf_Internal_Rela *rel,
4857 struct elf_link_hash_entry *h,
4858 Elf_Internal_Sym *sym)
4859 {
4860 if (h != NULL)
4861 switch (ELF32_R_TYPE (rel->r_info))
4862 {
4863 case R_PPC_GNU_VTINHERIT:
4864 case R_PPC_GNU_VTENTRY:
4865 return NULL;
4866 }
4867
4868 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4869 }
4870
4871 /* Update the got, plt and dynamic reloc reference counts for the
4872 section being removed. */
4873
4874 static bfd_boolean
4875 ppc_elf_gc_sweep_hook (bfd *abfd,
4876 struct bfd_link_info *info,
4877 asection *sec,
4878 const Elf_Internal_Rela *relocs)
4879 {
4880 struct ppc_elf_link_hash_table *htab;
4881 Elf_Internal_Shdr *symtab_hdr;
4882 struct elf_link_hash_entry **sym_hashes;
4883 bfd_signed_vma *local_got_refcounts;
4884 const Elf_Internal_Rela *rel, *relend;
4885 asection *got2;
4886
4887 if (info->relocatable)
4888 return TRUE;
4889
4890 if ((sec->flags & SEC_ALLOC) == 0)
4891 return TRUE;
4892
4893 elf_section_data (sec)->local_dynrel = NULL;
4894
4895 htab = ppc_elf_hash_table (info);
4896 symtab_hdr = &elf_symtab_hdr (abfd);
4897 sym_hashes = elf_sym_hashes (abfd);
4898 local_got_refcounts = elf_local_got_refcounts (abfd);
4899 got2 = bfd_get_section_by_name (abfd, ".got2");
4900
4901 relend = relocs + sec->reloc_count;
4902 for (rel = relocs; rel < relend; rel++)
4903 {
4904 unsigned long r_symndx;
4905 enum elf_ppc_reloc_type r_type;
4906 struct elf_link_hash_entry *h = NULL;
4907
4908 r_symndx = ELF32_R_SYM (rel->r_info);
4909 if (r_symndx >= symtab_hdr->sh_info)
4910 {
4911 struct elf_dyn_relocs **pp, *p;
4912 struct ppc_elf_link_hash_entry *eh;
4913
4914 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4915 while (h->root.type == bfd_link_hash_indirect
4916 || h->root.type == bfd_link_hash_warning)
4917 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4918 eh = (struct ppc_elf_link_hash_entry *) h;
4919
4920 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4921 if (p->sec == sec)
4922 {
4923 /* Everything must go for SEC. */
4924 *pp = p->next;
4925 break;
4926 }
4927 }
4928
4929 r_type = ELF32_R_TYPE (rel->r_info);
4930 if (!htab->is_vxworks
4931 && h == NULL
4932 && local_got_refcounts != NULL
4933 && (!info->shared
4934 || is_branch_reloc (r_type)))
4935 {
4936 struct plt_entry **local_plt = (struct plt_entry **)
4937 (local_got_refcounts + symtab_hdr->sh_info);
4938 char *local_got_tls_masks = (char *)
4939 (local_plt + symtab_hdr->sh_info);
4940 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4941 {
4942 struct plt_entry **ifunc = local_plt + r_symndx;
4943 bfd_vma addend = 0;
4944 struct plt_entry *ent;
4945
4946 if (r_type == R_PPC_PLTREL24 && info->shared)
4947 addend = rel->r_addend;
4948 ent = find_plt_ent (ifunc, got2, addend);
4949 if (ent->plt.refcount > 0)
4950 ent->plt.refcount -= 1;
4951 continue;
4952 }
4953 }
4954
4955 switch (r_type)
4956 {
4957 case R_PPC_GOT_TLSLD16:
4958 case R_PPC_GOT_TLSLD16_LO:
4959 case R_PPC_GOT_TLSLD16_HI:
4960 case R_PPC_GOT_TLSLD16_HA:
4961 case R_PPC_GOT_TLSGD16:
4962 case R_PPC_GOT_TLSGD16_LO:
4963 case R_PPC_GOT_TLSGD16_HI:
4964 case R_PPC_GOT_TLSGD16_HA:
4965 case R_PPC_GOT_TPREL16:
4966 case R_PPC_GOT_TPREL16_LO:
4967 case R_PPC_GOT_TPREL16_HI:
4968 case R_PPC_GOT_TPREL16_HA:
4969 case R_PPC_GOT_DTPREL16:
4970 case R_PPC_GOT_DTPREL16_LO:
4971 case R_PPC_GOT_DTPREL16_HI:
4972 case R_PPC_GOT_DTPREL16_HA:
4973 case R_PPC_GOT16:
4974 case R_PPC_GOT16_LO:
4975 case R_PPC_GOT16_HI:
4976 case R_PPC_GOT16_HA:
4977 if (h != NULL)
4978 {
4979 if (h->got.refcount > 0)
4980 h->got.refcount--;
4981 if (!info->shared)
4982 {
4983 struct plt_entry *ent;
4984
4985 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4986 if (ent != NULL && ent->plt.refcount > 0)
4987 ent->plt.refcount -= 1;
4988 }
4989 }
4990 else if (local_got_refcounts != NULL)
4991 {
4992 if (local_got_refcounts[r_symndx] > 0)
4993 local_got_refcounts[r_symndx]--;
4994 }
4995 break;
4996
4997 case R_PPC_REL24:
4998 case R_PPC_REL14:
4999 case R_PPC_REL14_BRTAKEN:
5000 case R_PPC_REL14_BRNTAKEN:
5001 case R_PPC_REL32:
5002 if (h == NULL || h == htab->elf.hgot)
5003 break;
5004 /* Fall thru */
5005
5006 case R_PPC_ADDR32:
5007 case R_PPC_ADDR24:
5008 case R_PPC_ADDR16:
5009 case R_PPC_ADDR16_LO:
5010 case R_PPC_ADDR16_HI:
5011 case R_PPC_ADDR16_HA:
5012 case R_PPC_ADDR14:
5013 case R_PPC_ADDR14_BRTAKEN:
5014 case R_PPC_ADDR14_BRNTAKEN:
5015 case R_PPC_UADDR32:
5016 case R_PPC_UADDR16:
5017 if (info->shared)
5018 break;
5019
5020 case R_PPC_PLT32:
5021 case R_PPC_PLTREL24:
5022 case R_PPC_PLTREL32:
5023 case R_PPC_PLT16_LO:
5024 case R_PPC_PLT16_HI:
5025 case R_PPC_PLT16_HA:
5026 if (h != NULL)
5027 {
5028 bfd_vma addend = 0;
5029 struct plt_entry *ent;
5030
5031 if (r_type == R_PPC_PLTREL24 && info->shared)
5032 addend = rel->r_addend;
5033 ent = find_plt_ent (&h->plt.plist, got2, addend);
5034 if (ent != NULL && ent->plt.refcount > 0)
5035 ent->plt.refcount -= 1;
5036 }
5037 break;
5038
5039 default:
5040 break;
5041 }
5042 }
5043 return TRUE;
5044 }
5045 \f
5046 /* Set plt output section type, htab->tls_get_addr, and call the
5047 generic ELF tls_setup function. */
5048
5049 asection *
5050 ppc_elf_tls_setup (bfd *obfd,
5051 struct bfd_link_info *info,
5052 int no_tls_get_addr_opt)
5053 {
5054 struct ppc_elf_link_hash_table *htab;
5055
5056 htab = ppc_elf_hash_table (info);
5057 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5058 FALSE, FALSE, TRUE);
5059 if (!no_tls_get_addr_opt)
5060 {
5061 struct elf_link_hash_entry *opt, *tga;
5062 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5063 FALSE, FALSE, TRUE);
5064 if (opt != NULL
5065 && (opt->root.type == bfd_link_hash_defined
5066 || opt->root.type == bfd_link_hash_defweak))
5067 {
5068 /* If glibc supports an optimized __tls_get_addr call stub,
5069 signalled by the presence of __tls_get_addr_opt, and we'll
5070 be calling __tls_get_addr via a plt call stub, then
5071 make __tls_get_addr point to __tls_get_addr_opt. */
5072 tga = htab->tls_get_addr;
5073 if (htab->elf.dynamic_sections_created
5074 && tga != NULL
5075 && (tga->type == STT_FUNC
5076 || tga->needs_plt)
5077 && !(SYMBOL_CALLS_LOCAL (info, tga)
5078 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5079 && tga->root.type == bfd_link_hash_undefweak)))
5080 {
5081 struct plt_entry *ent;
5082 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5083 if (ent->plt.refcount > 0)
5084 break;
5085 if (ent != NULL)
5086 {
5087 tga->root.type = bfd_link_hash_indirect;
5088 tga->root.u.i.link = &opt->root;
5089 ppc_elf_copy_indirect_symbol (info, opt, tga);
5090 if (opt->dynindx != -1)
5091 {
5092 /* Use __tls_get_addr_opt in dynamic relocations. */
5093 opt->dynindx = -1;
5094 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5095 opt->dynstr_index);
5096 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5097 return FALSE;
5098 }
5099 htab->tls_get_addr = opt;
5100 }
5101 }
5102 }
5103 else
5104 no_tls_get_addr_opt = TRUE;
5105 }
5106 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
5107 if (htab->plt_type == PLT_NEW
5108 && htab->plt != NULL
5109 && htab->plt->output_section != NULL)
5110 {
5111 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5112 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5113 }
5114
5115 return _bfd_elf_tls_setup (obfd, info);
5116 }
5117
5118 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5119 HASH. */
5120
5121 static bfd_boolean
5122 branch_reloc_hash_match (const bfd *ibfd,
5123 const Elf_Internal_Rela *rel,
5124 const struct elf_link_hash_entry *hash)
5125 {
5126 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5127 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5128 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5129
5130 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5131 {
5132 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5133 struct elf_link_hash_entry *h;
5134
5135 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5136 while (h->root.type == bfd_link_hash_indirect
5137 || h->root.type == bfd_link_hash_warning)
5138 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5139 if (h == hash)
5140 return TRUE;
5141 }
5142 return FALSE;
5143 }
5144
5145 /* Run through all the TLS relocs looking for optimization
5146 opportunities. */
5147
5148 bfd_boolean
5149 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5150 struct bfd_link_info *info)
5151 {
5152 bfd *ibfd;
5153 asection *sec;
5154 struct ppc_elf_link_hash_table *htab;
5155 int pass;
5156
5157 if (info->relocatable || !info->executable)
5158 return TRUE;
5159
5160 htab = ppc_elf_hash_table (info);
5161 if (htab == NULL)
5162 return FALSE;
5163
5164 /* Make two passes through the relocs. First time check that tls
5165 relocs involved in setting up a tls_get_addr call are indeed
5166 followed by such a call. If they are not, don't do any tls
5167 optimization. On the second pass twiddle tls_mask flags to
5168 notify relocate_section that optimization can be done, and
5169 adjust got and plt refcounts. */
5170 for (pass = 0; pass < 2; ++pass)
5171 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5172 {
5173 Elf_Internal_Sym *locsyms = NULL;
5174 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5175 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5176
5177 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5178 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5179 {
5180 Elf_Internal_Rela *relstart, *rel, *relend;
5181 int expecting_tls_get_addr = 0;
5182
5183 /* Read the relocations. */
5184 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5185 info->keep_memory);
5186 if (relstart == NULL)
5187 return FALSE;
5188
5189 relend = relstart + sec->reloc_count;
5190 for (rel = relstart; rel < relend; rel++)
5191 {
5192 enum elf_ppc_reloc_type r_type;
5193 unsigned long r_symndx;
5194 struct elf_link_hash_entry *h = NULL;
5195 char *tls_mask;
5196 char tls_set, tls_clear;
5197 bfd_boolean is_local;
5198 bfd_signed_vma *got_count;
5199
5200 r_symndx = ELF32_R_SYM (rel->r_info);
5201 if (r_symndx >= symtab_hdr->sh_info)
5202 {
5203 struct elf_link_hash_entry **sym_hashes;
5204
5205 sym_hashes = elf_sym_hashes (ibfd);
5206 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5207 while (h->root.type == bfd_link_hash_indirect
5208 || h->root.type == bfd_link_hash_warning)
5209 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5210 }
5211
5212 is_local = FALSE;
5213 if (h == NULL
5214 || !h->def_dynamic)
5215 is_local = TRUE;
5216
5217 r_type = ELF32_R_TYPE (rel->r_info);
5218 /* If this section has old-style __tls_get_addr calls
5219 without marker relocs, then check that each
5220 __tls_get_addr call reloc is preceded by a reloc
5221 that conceivably belongs to the __tls_get_addr arg
5222 setup insn. If we don't find matching arg setup
5223 relocs, don't do any tls optimization. */
5224 if (pass == 0
5225 && sec->has_tls_get_addr_call
5226 && h != NULL
5227 && h == htab->tls_get_addr
5228 && !expecting_tls_get_addr
5229 && is_branch_reloc (r_type))
5230 {
5231 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5232 "TLS optimization disabled\n",
5233 ibfd, sec, rel->r_offset);
5234 if (elf_section_data (sec)->relocs != relstart)
5235 free (relstart);
5236 return TRUE;
5237 }
5238
5239 expecting_tls_get_addr = 0;
5240 switch (r_type)
5241 {
5242 case R_PPC_GOT_TLSLD16:
5243 case R_PPC_GOT_TLSLD16_LO:
5244 expecting_tls_get_addr = 1;
5245 /* Fall thru */
5246
5247 case R_PPC_GOT_TLSLD16_HI:
5248 case R_PPC_GOT_TLSLD16_HA:
5249 /* These relocs should never be against a symbol
5250 defined in a shared lib. Leave them alone if
5251 that turns out to be the case. */
5252 if (!is_local)
5253 continue;
5254
5255 /* LD -> LE */
5256 tls_set = 0;
5257 tls_clear = TLS_LD;
5258 break;
5259
5260 case R_PPC_GOT_TLSGD16:
5261 case R_PPC_GOT_TLSGD16_LO:
5262 expecting_tls_get_addr = 1;
5263 /* Fall thru */
5264
5265 case R_PPC_GOT_TLSGD16_HI:
5266 case R_PPC_GOT_TLSGD16_HA:
5267 if (is_local)
5268 /* GD -> LE */
5269 tls_set = 0;
5270 else
5271 /* GD -> IE */
5272 tls_set = TLS_TLS | TLS_TPRELGD;
5273 tls_clear = TLS_GD;
5274 break;
5275
5276 case R_PPC_GOT_TPREL16:
5277 case R_PPC_GOT_TPREL16_LO:
5278 case R_PPC_GOT_TPREL16_HI:
5279 case R_PPC_GOT_TPREL16_HA:
5280 if (is_local)
5281 {
5282 /* IE -> LE */
5283 tls_set = 0;
5284 tls_clear = TLS_TPREL;
5285 break;
5286 }
5287 else
5288 continue;
5289
5290 case R_PPC_TLSGD:
5291 case R_PPC_TLSLD:
5292 expecting_tls_get_addr = 2;
5293 tls_set = 0;
5294 tls_clear = 0;
5295 break;
5296
5297 default:
5298 continue;
5299 }
5300
5301 if (pass == 0)
5302 {
5303 if (!expecting_tls_get_addr
5304 || (expecting_tls_get_addr == 1
5305 && !sec->has_tls_get_addr_call))
5306 continue;
5307
5308 if (rel + 1 < relend
5309 && branch_reloc_hash_match (ibfd, rel + 1,
5310 htab->tls_get_addr))
5311 continue;
5312
5313 /* Uh oh, we didn't find the expected call. We
5314 could just mark this symbol to exclude it
5315 from tls optimization but it's safer to skip
5316 the entire optimization. */
5317 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5318 "TLS optimization disabled\n"),
5319 ibfd, sec, rel->r_offset);
5320 if (elf_section_data (sec)->relocs != relstart)
5321 free (relstart);
5322 return TRUE;
5323 }
5324
5325 if (expecting_tls_get_addr)
5326 {
5327 struct plt_entry *ent;
5328 bfd_vma addend = 0;
5329
5330 if (info->shared
5331 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5332 addend = rel[1].r_addend;
5333 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5334 got2, addend);
5335 if (ent != NULL && ent->plt.refcount > 0)
5336 ent->plt.refcount -= 1;
5337
5338 if (expecting_tls_get_addr == 2)
5339 continue;
5340 }
5341
5342 if (h != NULL)
5343 {
5344 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5345 got_count = &h->got.refcount;
5346 }
5347 else
5348 {
5349 bfd_signed_vma *lgot_refs;
5350 struct plt_entry **local_plt;
5351 char *lgot_masks;
5352
5353 if (locsyms == NULL)
5354 {
5355 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5356 if (locsyms == NULL)
5357 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5358 symtab_hdr->sh_info,
5359 0, NULL, NULL, NULL);
5360 if (locsyms == NULL)
5361 {
5362 if (elf_section_data (sec)->relocs != relstart)
5363 free (relstart);
5364 return FALSE;
5365 }
5366 }
5367 lgot_refs = elf_local_got_refcounts (ibfd);
5368 if (lgot_refs == NULL)
5369 abort ();
5370 local_plt = (struct plt_entry **)
5371 (lgot_refs + symtab_hdr->sh_info);
5372 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5373 tls_mask = &lgot_masks[r_symndx];
5374 got_count = &lgot_refs[r_symndx];
5375 }
5376
5377 if (tls_set == 0)
5378 {
5379 /* We managed to get rid of a got entry. */
5380 if (*got_count > 0)
5381 *got_count -= 1;
5382 }
5383
5384 *tls_mask |= tls_set;
5385 *tls_mask &= ~tls_clear;
5386 }
5387
5388 if (elf_section_data (sec)->relocs != relstart)
5389 free (relstart);
5390 }
5391
5392 if (locsyms != NULL
5393 && (symtab_hdr->contents != (unsigned char *) locsyms))
5394 {
5395 if (!info->keep_memory)
5396 free (locsyms);
5397 else
5398 symtab_hdr->contents = (unsigned char *) locsyms;
5399 }
5400 }
5401 return TRUE;
5402 }
5403 \f
5404 /* Return true if we have dynamic relocs that apply to read-only sections. */
5405
5406 static bfd_boolean
5407 readonly_dynrelocs (struct elf_link_hash_entry *h)
5408 {
5409 struct elf_dyn_relocs *p;
5410
5411 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5412 {
5413 asection *s = p->sec->output_section;
5414
5415 if (s != NULL
5416 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5417 == (SEC_READONLY | SEC_ALLOC)))
5418 return TRUE;
5419 }
5420 return FALSE;
5421 }
5422
5423 /* Adjust a symbol defined by a dynamic object and referenced by a
5424 regular object. The current definition is in some section of the
5425 dynamic object, but we're not including those sections. We have to
5426 change the definition to something the rest of the link can
5427 understand. */
5428
5429 static bfd_boolean
5430 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5431 struct elf_link_hash_entry *h)
5432 {
5433 struct ppc_elf_link_hash_table *htab;
5434 asection *s;
5435
5436 #ifdef DEBUG
5437 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5438 h->root.root.string);
5439 #endif
5440
5441 /* Make sure we know what is going on here. */
5442 htab = ppc_elf_hash_table (info);
5443 BFD_ASSERT (htab->elf.dynobj != NULL
5444 && (h->needs_plt
5445 || h->type == STT_GNU_IFUNC
5446 || h->u.weakdef != NULL
5447 || (h->def_dynamic
5448 && h->ref_regular
5449 && !h->def_regular)));
5450
5451 /* Deal with function syms. */
5452 if (h->type == STT_FUNC
5453 || h->type == STT_GNU_IFUNC
5454 || h->needs_plt)
5455 {
5456 /* Clear procedure linkage table information for any symbol that
5457 won't need a .plt entry. */
5458 struct plt_entry *ent;
5459 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5460 if (ent->plt.refcount > 0)
5461 break;
5462 if (ent == NULL
5463 || (h->type != STT_GNU_IFUNC
5464 && (SYMBOL_CALLS_LOCAL (info, h)
5465 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5466 && h->root.type == bfd_link_hash_undefweak))))
5467 {
5468 /* A PLT entry is not required/allowed when:
5469
5470 1. We are not using ld.so; because then the PLT entry
5471 can't be set up, so we can't use one. In this case,
5472 ppc_elf_adjust_dynamic_symbol won't even be called.
5473
5474 2. GC has rendered the entry unused.
5475
5476 3. We know for certain that a call to this symbol
5477 will go to this object, or will remain undefined. */
5478 h->plt.plist = NULL;
5479 h->needs_plt = 0;
5480 }
5481 else
5482 {
5483 /* After adjust_dynamic_symbol, non_got_ref set in the
5484 non-shared case means that we have allocated space in
5485 .dynbss for the symbol and thus dyn_relocs for this
5486 symbol should be discarded.
5487 If we get here we know we are making a PLT entry for this
5488 symbol, and in an executable we'd normally resolve
5489 relocations against this symbol to the PLT entry. Allow
5490 dynamic relocs if the reference is weak, and the dynamic
5491 relocs will not cause text relocation. */
5492 if (!h->ref_regular_nonweak
5493 && h->non_got_ref
5494 && h->type != STT_GNU_IFUNC
5495 && !htab->is_vxworks
5496 && !ppc_elf_hash_entry (h)->has_sda_refs
5497 && !readonly_dynrelocs (h))
5498 h->non_got_ref = 0;
5499 }
5500 return TRUE;
5501 }
5502 else
5503 h->plt.plist = NULL;
5504
5505 /* If this is a weak symbol, and there is a real definition, the
5506 processor independent code will have arranged for us to see the
5507 real definition first, and we can just use the same value. */
5508 if (h->u.weakdef != NULL)
5509 {
5510 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5511 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5512 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5513 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5514 if (ELIMINATE_COPY_RELOCS)
5515 h->non_got_ref = h->u.weakdef->non_got_ref;
5516 return TRUE;
5517 }
5518
5519 /* This is a reference to a symbol defined by a dynamic object which
5520 is not a function. */
5521
5522 /* If we are creating a shared library, we must presume that the
5523 only references to the symbol are via the global offset table.
5524 For such cases we need not do anything here; the relocations will
5525 be handled correctly by relocate_section. */
5526 if (info->shared)
5527 return TRUE;
5528
5529 /* If there are no references to this symbol that do not use the
5530 GOT, we don't need to generate a copy reloc. */
5531 if (!h->non_got_ref)
5532 return TRUE;
5533
5534 /* If we didn't find any dynamic relocs in read-only sections, then
5535 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5536 We can't do this if there are any small data relocations. This
5537 doesn't work on VxWorks, where we can not have dynamic
5538 relocations (other than copy and jump slot relocations) in an
5539 executable. */
5540 if (ELIMINATE_COPY_RELOCS
5541 && !ppc_elf_hash_entry (h)->has_sda_refs
5542 && !htab->is_vxworks
5543 && !h->def_regular
5544 && !readonly_dynrelocs (h))
5545 {
5546 h->non_got_ref = 0;
5547 return TRUE;
5548 }
5549
5550 /* We must allocate the symbol in our .dynbss section, which will
5551 become part of the .bss section of the executable. There will be
5552 an entry for this symbol in the .dynsym section. The dynamic
5553 object will contain position independent code, so all references
5554 from the dynamic object to this symbol will go through the global
5555 offset table. The dynamic linker will use the .dynsym entry to
5556 determine the address it must put in the global offset table, so
5557 both the dynamic object and the regular object will refer to the
5558 same memory location for the variable.
5559
5560 Of course, if the symbol is referenced using SDAREL relocs, we
5561 must instead allocate it in .sbss. */
5562
5563 if (ppc_elf_hash_entry (h)->has_sda_refs)
5564 s = htab->dynsbss;
5565 else
5566 s = htab->dynbss;
5567 BFD_ASSERT (s != NULL);
5568
5569 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5570 copy the initial value out of the dynamic object and into the
5571 runtime process image. We need to remember the offset into the
5572 .rela.bss section we are going to use. */
5573 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5574 {
5575 asection *srel;
5576
5577 if (ppc_elf_hash_entry (h)->has_sda_refs)
5578 srel = htab->relsbss;
5579 else
5580 srel = htab->relbss;
5581 BFD_ASSERT (srel != NULL);
5582 srel->size += sizeof (Elf32_External_Rela);
5583 h->needs_copy = 1;
5584 }
5585
5586 return _bfd_elf_adjust_dynamic_copy (h, s);
5587 }
5588 \f
5589 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5590 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5591 specifying the addend on the plt relocation. For -fpic code, the sym
5592 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5593 xxxxxxxx.got2.plt_pic32.<callee>. */
5594
5595 static bfd_boolean
5596 add_stub_sym (struct plt_entry *ent,
5597 struct elf_link_hash_entry *h,
5598 struct bfd_link_info *info)
5599 {
5600 struct elf_link_hash_entry *sh;
5601 size_t len1, len2, len3;
5602 char *name;
5603 const char *stub;
5604 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5605
5606 if (info->shared)
5607 stub = ".plt_pic32.";
5608 else
5609 stub = ".plt_call32.";
5610
5611 len1 = strlen (h->root.root.string);
5612 len2 = strlen (stub);
5613 len3 = 0;
5614 if (ent->sec)
5615 len3 = strlen (ent->sec->name);
5616 name = bfd_malloc (len1 + len2 + len3 + 9);
5617 if (name == NULL)
5618 return FALSE;
5619 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5620 if (ent->sec)
5621 memcpy (name + 8, ent->sec->name, len3);
5622 memcpy (name + 8 + len3, stub, len2);
5623 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5624 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5625 if (sh == NULL)
5626 return FALSE;
5627 if (sh->root.type == bfd_link_hash_new)
5628 {
5629 sh->root.type = bfd_link_hash_defined;
5630 sh->root.u.def.section = htab->glink;
5631 sh->root.u.def.value = ent->glink_offset;
5632 sh->ref_regular = 1;
5633 sh->def_regular = 1;
5634 sh->ref_regular_nonweak = 1;
5635 sh->forced_local = 1;
5636 sh->non_elf = 0;
5637 }
5638 return TRUE;
5639 }
5640
5641 /* Allocate NEED contiguous space in .got, and return the offset.
5642 Handles allocation of the got header when crossing 32k. */
5643
5644 static bfd_vma
5645 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5646 {
5647 bfd_vma where;
5648 unsigned int max_before_header;
5649
5650 if (htab->plt_type == PLT_VXWORKS)
5651 {
5652 where = htab->got->size;
5653 htab->got->size += need;
5654 }
5655 else
5656 {
5657 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5658 if (need <= htab->got_gap)
5659 {
5660 where = max_before_header - htab->got_gap;
5661 htab->got_gap -= need;
5662 }
5663 else
5664 {
5665 if (htab->got->size + need > max_before_header
5666 && htab->got->size <= max_before_header)
5667 {
5668 htab->got_gap = max_before_header - htab->got->size;
5669 htab->got->size = max_before_header + htab->got_header_size;
5670 }
5671 where = htab->got->size;
5672 htab->got->size += need;
5673 }
5674 }
5675 return where;
5676 }
5677
5678 /* Allocate space in associated reloc sections for dynamic relocs. */
5679
5680 static bfd_boolean
5681 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5682 {
5683 struct bfd_link_info *info = inf;
5684 struct ppc_elf_link_hash_entry *eh;
5685 struct ppc_elf_link_hash_table *htab;
5686 struct elf_dyn_relocs *p;
5687
5688 if (h->root.type == bfd_link_hash_indirect)
5689 return TRUE;
5690
5691 htab = ppc_elf_hash_table (info);
5692 if (htab->elf.dynamic_sections_created
5693 || h->type == STT_GNU_IFUNC)
5694 {
5695 struct plt_entry *ent;
5696 bfd_boolean doneone = FALSE;
5697 bfd_vma plt_offset = 0, glink_offset = 0;
5698 bfd_boolean dyn;
5699
5700 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5701 if (ent->plt.refcount > 0)
5702 {
5703 /* Make sure this symbol is output as a dynamic symbol. */
5704 if (h->dynindx == -1
5705 && !h->forced_local
5706 && !h->def_regular
5707 && htab->elf.dynamic_sections_created)
5708 {
5709 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5710 return FALSE;
5711 }
5712
5713 dyn = htab->elf.dynamic_sections_created;
5714 if (info->shared
5715 || h->type == STT_GNU_IFUNC
5716 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5717 {
5718 asection *s = htab->plt;
5719 if (!dyn || h->dynindx == -1)
5720 s = htab->iplt;
5721
5722 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5723 {
5724 if (!doneone)
5725 {
5726 plt_offset = s->size;
5727 s->size += 4;
5728 }
5729 ent->plt.offset = plt_offset;
5730
5731 s = htab->glink;
5732 if (!doneone || info->shared)
5733 {
5734 glink_offset = s->size;
5735 s->size += GLINK_ENTRY_SIZE;
5736 if (h == htab->tls_get_addr
5737 && !htab->no_tls_get_addr_opt)
5738 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5739 }
5740 if (!doneone
5741 && !info->shared
5742 && h->def_dynamic
5743 && !h->def_regular)
5744 {
5745 h->root.u.def.section = s;
5746 h->root.u.def.value = glink_offset;
5747 }
5748 ent->glink_offset = glink_offset;
5749
5750 if (htab->emit_stub_syms
5751 && !add_stub_sym (ent, h, info))
5752 return FALSE;
5753 }
5754 else
5755 {
5756 if (!doneone)
5757 {
5758 /* If this is the first .plt entry, make room
5759 for the special first entry. */
5760 if (s->size == 0)
5761 s->size += htab->plt_initial_entry_size;
5762
5763 /* The PowerPC PLT is actually composed of two
5764 parts, the first part is 2 words (for a load
5765 and a jump), and then there is a remaining
5766 word available at the end. */
5767 plt_offset = (htab->plt_initial_entry_size
5768 + (htab->plt_slot_size
5769 * ((s->size
5770 - htab->plt_initial_entry_size)
5771 / htab->plt_entry_size)));
5772
5773 /* If this symbol is not defined in a regular
5774 file, and we are not generating a shared
5775 library, then set the symbol to this location
5776 in the .plt. This is to avoid text
5777 relocations, and is required to make
5778 function pointers compare as equal between
5779 the normal executable and the shared library. */
5780 if (! info->shared
5781 && h->def_dynamic
5782 && !h->def_regular)
5783 {
5784 h->root.u.def.section = s;
5785 h->root.u.def.value = plt_offset;
5786 }
5787
5788 /* Make room for this entry. */
5789 s->size += htab->plt_entry_size;
5790 /* After the 8192nd entry, room for two entries
5791 is allocated. */
5792 if (htab->plt_type == PLT_OLD
5793 && (s->size - htab->plt_initial_entry_size)
5794 / htab->plt_entry_size
5795 > PLT_NUM_SINGLE_ENTRIES)
5796 s->size += htab->plt_entry_size;
5797 }
5798 ent->plt.offset = plt_offset;
5799 }
5800
5801 /* We also need to make an entry in the .rela.plt section. */
5802 if (!doneone)
5803 {
5804 if (!htab->elf.dynamic_sections_created
5805 || h->dynindx == -1)
5806 htab->reliplt->size += sizeof (Elf32_External_Rela);
5807 else
5808 {
5809 htab->relplt->size += sizeof (Elf32_External_Rela);
5810
5811 if (htab->plt_type == PLT_VXWORKS)
5812 {
5813 /* Allocate space for the unloaded relocations. */
5814 if (!info->shared
5815 && htab->elf.dynamic_sections_created)
5816 {
5817 if (ent->plt.offset
5818 == (bfd_vma) htab->plt_initial_entry_size)
5819 {
5820 htab->srelplt2->size
5821 += (sizeof (Elf32_External_Rela)
5822 * VXWORKS_PLTRESOLVE_RELOCS);
5823 }
5824
5825 htab->srelplt2->size
5826 += (sizeof (Elf32_External_Rela)
5827 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5828 }
5829
5830 /* Every PLT entry has an associated GOT entry in
5831 .got.plt. */
5832 htab->sgotplt->size += 4;
5833 }
5834 }
5835 doneone = TRUE;
5836 }
5837 }
5838 else
5839 ent->plt.offset = (bfd_vma) -1;
5840 }
5841 else
5842 ent->plt.offset = (bfd_vma) -1;
5843
5844 if (!doneone)
5845 {
5846 h->plt.plist = NULL;
5847 h->needs_plt = 0;
5848 }
5849 }
5850 else
5851 {
5852 h->plt.plist = NULL;
5853 h->needs_plt = 0;
5854 }
5855
5856 eh = (struct ppc_elf_link_hash_entry *) h;
5857 if (eh->elf.got.refcount > 0)
5858 {
5859 bfd_boolean dyn;
5860 unsigned int need;
5861
5862 /* Make sure this symbol is output as a dynamic symbol. */
5863 if (eh->elf.dynindx == -1
5864 && !eh->elf.forced_local
5865 && eh->elf.type != STT_GNU_IFUNC
5866 && htab->elf.dynamic_sections_created)
5867 {
5868 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5869 return FALSE;
5870 }
5871
5872 need = 0;
5873 if ((eh->tls_mask & TLS_TLS) != 0)
5874 {
5875 if ((eh->tls_mask & TLS_LD) != 0)
5876 {
5877 if (!eh->elf.def_dynamic)
5878 /* We'll just use htab->tlsld_got.offset. This should
5879 always be the case. It's a little odd if we have
5880 a local dynamic reloc against a non-local symbol. */
5881 htab->tlsld_got.refcount += 1;
5882 else
5883 need += 8;
5884 }
5885 if ((eh->tls_mask & TLS_GD) != 0)
5886 need += 8;
5887 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5888 need += 4;
5889 if ((eh->tls_mask & TLS_DTPREL) != 0)
5890 need += 4;
5891 }
5892 else
5893 need += 4;
5894 if (need == 0)
5895 eh->elf.got.offset = (bfd_vma) -1;
5896 else
5897 {
5898 eh->elf.got.offset = allocate_got (htab, need);
5899 dyn = htab->elf.dynamic_sections_created;
5900 if ((info->shared
5901 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5902 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5903 || eh->elf.root.type != bfd_link_hash_undefweak))
5904 {
5905 asection *rsec = htab->relgot;
5906
5907 if (eh->elf.type == STT_GNU_IFUNC)
5908 rsec = htab->reliplt;
5909 /* All the entries we allocated need relocs.
5910 Except LD only needs one. */
5911 if ((eh->tls_mask & TLS_LD) != 0
5912 && eh->elf.def_dynamic)
5913 need -= 4;
5914 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5915 }
5916 }
5917 }
5918 else
5919 eh->elf.got.offset = (bfd_vma) -1;
5920
5921 if (eh->dyn_relocs == NULL
5922 || !htab->elf.dynamic_sections_created)
5923 return TRUE;
5924
5925 /* In the shared -Bsymbolic case, discard space allocated for
5926 dynamic pc-relative relocs against symbols which turn out to be
5927 defined in regular objects. For the normal shared case, discard
5928 space for relocs that have become local due to symbol visibility
5929 changes. */
5930
5931 if (info->shared)
5932 {
5933 /* Relocs that use pc_count are those that appear on a call insn,
5934 or certain REL relocs (see must_be_dyn_reloc) that can be
5935 generated via assembly. We want calls to protected symbols to
5936 resolve directly to the function rather than going via the plt.
5937 If people want function pointer comparisons to work as expected
5938 then they should avoid writing weird assembly. */
5939 if (SYMBOL_CALLS_LOCAL (info, h))
5940 {
5941 struct elf_dyn_relocs **pp;
5942
5943 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5944 {
5945 p->count -= p->pc_count;
5946 p->pc_count = 0;
5947 if (p->count == 0)
5948 *pp = p->next;
5949 else
5950 pp = &p->next;
5951 }
5952 }
5953
5954 if (htab->is_vxworks)
5955 {
5956 struct elf_dyn_relocs **pp;
5957
5958 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5959 {
5960 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5961 *pp = p->next;
5962 else
5963 pp = &p->next;
5964 }
5965 }
5966
5967 /* Discard relocs on undefined symbols that must be local. */
5968 if (eh->dyn_relocs != NULL
5969 && h->root.type == bfd_link_hash_undefined
5970 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5971 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5972 eh->dyn_relocs = NULL;
5973
5974 /* Also discard relocs on undefined weak syms with non-default
5975 visibility. */
5976 if (eh->dyn_relocs != NULL
5977 && h->root.type == bfd_link_hash_undefweak)
5978 {
5979 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5980 eh->dyn_relocs = NULL;
5981
5982 /* Make sure undefined weak symbols are output as a dynamic
5983 symbol in PIEs. */
5984 else if (h->dynindx == -1
5985 && !h->forced_local
5986 && !h->def_regular)
5987 {
5988 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5989 return FALSE;
5990 }
5991 }
5992 }
5993 else if (ELIMINATE_COPY_RELOCS)
5994 {
5995 /* For the non-shared case, discard space for relocs against
5996 symbols which turn out to need copy relocs or are not
5997 dynamic. */
5998
5999 if (!h->non_got_ref
6000 && !h->def_regular)
6001 {
6002 /* Make sure this symbol is output as a dynamic symbol.
6003 Undefined weak syms won't yet be marked as dynamic. */
6004 if (h->dynindx == -1
6005 && !h->forced_local)
6006 {
6007 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6008 return FALSE;
6009 }
6010
6011 /* If that succeeded, we know we'll be keeping all the
6012 relocs. */
6013 if (h->dynindx != -1)
6014 goto keep;
6015 }
6016
6017 eh->dyn_relocs = NULL;
6018
6019 keep: ;
6020 }
6021
6022 /* Finally, allocate space. */
6023 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6024 {
6025 asection *sreloc = elf_section_data (p->sec)->sreloc;
6026 if (!htab->elf.dynamic_sections_created)
6027 sreloc = htab->reliplt;
6028 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6029 }
6030
6031 return TRUE;
6032 }
6033
6034 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6035 read-only sections. */
6036
6037 static bfd_boolean
6038 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6039 {
6040 if (h->root.type == bfd_link_hash_indirect)
6041 return TRUE;
6042
6043 if (readonly_dynrelocs (h))
6044 {
6045 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6046
6047 /* Not an error, just cut short the traversal. */
6048 return FALSE;
6049 }
6050 return TRUE;
6051 }
6052
6053 static const unsigned char glink_eh_frame_cie[] =
6054 {
6055 0, 0, 0, 16, /* length. */
6056 0, 0, 0, 0, /* id. */
6057 1, /* CIE version. */
6058 'z', 'R', 0, /* Augmentation string. */
6059 4, /* Code alignment. */
6060 0x7c, /* Data alignment. */
6061 65, /* RA reg. */
6062 1, /* Augmentation size. */
6063 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6064 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6065 };
6066
6067 /* Set the sizes of the dynamic sections. */
6068
6069 static bfd_boolean
6070 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6071 struct bfd_link_info *info)
6072 {
6073 struct ppc_elf_link_hash_table *htab;
6074 asection *s;
6075 bfd_boolean relocs;
6076 bfd *ibfd;
6077
6078 #ifdef DEBUG
6079 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6080 #endif
6081
6082 htab = ppc_elf_hash_table (info);
6083 BFD_ASSERT (htab->elf.dynobj != NULL);
6084
6085 if (elf_hash_table (info)->dynamic_sections_created)
6086 {
6087 /* Set the contents of the .interp section to the interpreter. */
6088 if (info->executable)
6089 {
6090 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6091 BFD_ASSERT (s != NULL);
6092 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6093 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6094 }
6095 }
6096
6097 if (htab->plt_type == PLT_OLD)
6098 htab->got_header_size = 16;
6099 else if (htab->plt_type == PLT_NEW)
6100 htab->got_header_size = 12;
6101
6102 /* Set up .got offsets for local syms, and space for local dynamic
6103 relocs. */
6104 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6105 {
6106 bfd_signed_vma *local_got;
6107 bfd_signed_vma *end_local_got;
6108 struct plt_entry **local_plt;
6109 struct plt_entry **end_local_plt;
6110 char *lgot_masks;
6111 bfd_size_type locsymcount;
6112 Elf_Internal_Shdr *symtab_hdr;
6113
6114 if (!is_ppc_elf (ibfd))
6115 continue;
6116
6117 for (s = ibfd->sections; s != NULL; s = s->next)
6118 {
6119 struct elf_dyn_relocs *p;
6120
6121 for (p = ((struct elf_dyn_relocs *)
6122 elf_section_data (s)->local_dynrel);
6123 p != NULL;
6124 p = p->next)
6125 {
6126 if (!bfd_is_abs_section (p->sec)
6127 && bfd_is_abs_section (p->sec->output_section))
6128 {
6129 /* Input section has been discarded, either because
6130 it is a copy of a linkonce section or due to
6131 linker script /DISCARD/, so we'll be discarding
6132 the relocs too. */
6133 }
6134 else if (htab->is_vxworks
6135 && strcmp (p->sec->output_section->name,
6136 ".tls_vars") == 0)
6137 {
6138 /* Relocations in vxworks .tls_vars sections are
6139 handled specially by the loader. */
6140 }
6141 else if (p->count != 0)
6142 {
6143 asection *sreloc = elf_section_data (p->sec)->sreloc;
6144 if (!htab->elf.dynamic_sections_created)
6145 sreloc = htab->reliplt;
6146 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6147 if ((p->sec->output_section->flags
6148 & (SEC_READONLY | SEC_ALLOC))
6149 == (SEC_READONLY | SEC_ALLOC))
6150 info->flags |= DF_TEXTREL;
6151 }
6152 }
6153 }
6154
6155 local_got = elf_local_got_refcounts (ibfd);
6156 if (!local_got)
6157 continue;
6158
6159 symtab_hdr = &elf_symtab_hdr (ibfd);
6160 locsymcount = symtab_hdr->sh_info;
6161 end_local_got = local_got + locsymcount;
6162 local_plt = (struct plt_entry **) end_local_got;
6163 end_local_plt = local_plt + locsymcount;
6164 lgot_masks = (char *) end_local_plt;
6165
6166 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6167 if (*local_got > 0)
6168 {
6169 unsigned int need = 0;
6170 if ((*lgot_masks & TLS_TLS) != 0)
6171 {
6172 if ((*lgot_masks & TLS_GD) != 0)
6173 need += 8;
6174 if ((*lgot_masks & TLS_LD) != 0)
6175 htab->tlsld_got.refcount += 1;
6176 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6177 need += 4;
6178 if ((*lgot_masks & TLS_DTPREL) != 0)
6179 need += 4;
6180 }
6181 else
6182 need += 4;
6183 if (need == 0)
6184 *local_got = (bfd_vma) -1;
6185 else
6186 {
6187 *local_got = allocate_got (htab, need);
6188 if (info->shared)
6189 {
6190 asection *srel = htab->relgot;
6191 if ((*lgot_masks & PLT_IFUNC) != 0)
6192 srel = htab->reliplt;
6193 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6194 }
6195 }
6196 }
6197 else
6198 *local_got = (bfd_vma) -1;
6199
6200 if (htab->is_vxworks)
6201 continue;
6202
6203 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6204 for (; local_plt < end_local_plt; ++local_plt)
6205 {
6206 struct plt_entry *ent;
6207 bfd_boolean doneone = FALSE;
6208 bfd_vma plt_offset = 0, glink_offset = 0;
6209
6210 for (ent = *local_plt; ent != NULL; ent = ent->next)
6211 if (ent->plt.refcount > 0)
6212 {
6213 s = htab->iplt;
6214
6215 if (!doneone)
6216 {
6217 plt_offset = s->size;
6218 s->size += 4;
6219 }
6220 ent->plt.offset = plt_offset;
6221
6222 s = htab->glink;
6223 if (!doneone || info->shared)
6224 {
6225 glink_offset = s->size;
6226 s->size += GLINK_ENTRY_SIZE;
6227 }
6228 ent->glink_offset = glink_offset;
6229
6230 if (!doneone)
6231 {
6232 htab->reliplt->size += sizeof (Elf32_External_Rela);
6233 doneone = TRUE;
6234 }
6235 }
6236 else
6237 ent->plt.offset = (bfd_vma) -1;
6238 }
6239 }
6240
6241 /* Allocate space for global sym dynamic relocs. */
6242 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6243
6244 if (htab->tlsld_got.refcount > 0)
6245 {
6246 htab->tlsld_got.offset = allocate_got (htab, 8);
6247 if (info->shared)
6248 htab->relgot->size += sizeof (Elf32_External_Rela);
6249 }
6250 else
6251 htab->tlsld_got.offset = (bfd_vma) -1;
6252
6253 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6254 {
6255 unsigned int g_o_t = 32768;
6256
6257 /* If we haven't allocated the header, do so now. When we get here,
6258 for old plt/got the got size will be 0 to 32764 (not allocated),
6259 or 32780 to 65536 (header allocated). For new plt/got, the
6260 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6261 if (htab->got->size <= 32768)
6262 {
6263 g_o_t = htab->got->size;
6264 if (htab->plt_type == PLT_OLD)
6265 g_o_t += 4;
6266 htab->got->size += htab->got_header_size;
6267 }
6268
6269 htab->elf.hgot->root.u.def.value = g_o_t;
6270 }
6271 if (info->shared)
6272 {
6273 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6274 if (sda != NULL
6275 && !(sda->root.type == bfd_link_hash_defined
6276 || sda->root.type == bfd_link_hash_defweak))
6277 {
6278 sda->root.type = bfd_link_hash_defined;
6279 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6280 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6281 }
6282 }
6283
6284 if (htab->glink != NULL
6285 && htab->glink->size != 0
6286 && htab->elf.dynamic_sections_created)
6287 {
6288 htab->glink_pltresolve = htab->glink->size;
6289 /* Space for the branch table. */
6290 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6291 /* Pad out to align the start of PLTresolve. */
6292 htab->glink->size += -htab->glink->size & 15;
6293 htab->glink->size += GLINK_PLTRESOLVE;
6294
6295 if (htab->emit_stub_syms)
6296 {
6297 struct elf_link_hash_entry *sh;
6298 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6299 TRUE, FALSE, FALSE);
6300 if (sh == NULL)
6301 return FALSE;
6302 if (sh->root.type == bfd_link_hash_new)
6303 {
6304 sh->root.type = bfd_link_hash_defined;
6305 sh->root.u.def.section = htab->glink;
6306 sh->root.u.def.value = htab->glink_pltresolve;
6307 sh->ref_regular = 1;
6308 sh->def_regular = 1;
6309 sh->ref_regular_nonweak = 1;
6310 sh->forced_local = 1;
6311 sh->non_elf = 0;
6312 }
6313 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6314 TRUE, FALSE, FALSE);
6315 if (sh == NULL)
6316 return FALSE;
6317 if (sh->root.type == bfd_link_hash_new)
6318 {
6319 sh->root.type = bfd_link_hash_defined;
6320 sh->root.u.def.section = htab->glink;
6321 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6322 sh->ref_regular = 1;
6323 sh->def_regular = 1;
6324 sh->ref_regular_nonweak = 1;
6325 sh->forced_local = 1;
6326 sh->non_elf = 0;
6327 }
6328 }
6329 }
6330
6331 if (htab->glink != NULL
6332 && htab->glink->size != 0
6333 && htab->glink_eh_frame != NULL
6334 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6335 && _bfd_elf_eh_frame_present (info))
6336 {
6337 s = htab->glink_eh_frame;
6338 s->size = sizeof (glink_eh_frame_cie) + 20;
6339 if (info->shared)
6340 {
6341 s->size += 4;
6342 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6343 s->size += 4;
6344 }
6345 }
6346
6347 /* We've now determined the sizes of the various dynamic sections.
6348 Allocate memory for them. */
6349 relocs = FALSE;
6350 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6351 {
6352 bfd_boolean strip_section = TRUE;
6353
6354 if ((s->flags & SEC_LINKER_CREATED) == 0)
6355 continue;
6356
6357 if (s == htab->plt
6358 || s == htab->got)
6359 {
6360 /* We'd like to strip these sections if they aren't needed, but if
6361 we've exported dynamic symbols from them we must leave them.
6362 It's too late to tell BFD to get rid of the symbols. */
6363 if (htab->elf.hplt != NULL)
6364 strip_section = FALSE;
6365 /* Strip this section if we don't need it; see the
6366 comment below. */
6367 }
6368 else if (s == htab->iplt
6369 || s == htab->glink
6370 || s == htab->glink_eh_frame
6371 || s == htab->sgotplt
6372 || s == htab->sbss
6373 || s == htab->dynbss
6374 || s == htab->dynsbss
6375 || s == htab->sdata[0].section
6376 || s == htab->sdata[1].section)
6377 {
6378 /* Strip these too. */
6379 }
6380 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6381 ".rela"))
6382 {
6383 if (s->size != 0)
6384 {
6385 /* Remember whether there are any relocation sections. */
6386 relocs = TRUE;
6387
6388 /* We use the reloc_count field as a counter if we need
6389 to copy relocs into the output file. */
6390 s->reloc_count = 0;
6391 }
6392 }
6393 else
6394 {
6395 /* It's not one of our sections, so don't allocate space. */
6396 continue;
6397 }
6398
6399 if (s->size == 0 && strip_section)
6400 {
6401 /* If we don't need this section, strip it from the
6402 output file. This is mostly to handle .rela.bss and
6403 .rela.plt. We must create both sections in
6404 create_dynamic_sections, because they must be created
6405 before the linker maps input sections to output
6406 sections. The linker does that before
6407 adjust_dynamic_symbol is called, and it is that
6408 function which decides whether anything needs to go
6409 into these sections. */
6410 s->flags |= SEC_EXCLUDE;
6411 continue;
6412 }
6413
6414 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6415 continue;
6416
6417 /* Allocate memory for the section contents. */
6418 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6419 if (s->contents == NULL)
6420 return FALSE;
6421 }
6422
6423 if (htab->elf.dynamic_sections_created)
6424 {
6425 /* Add some entries to the .dynamic section. We fill in the
6426 values later, in ppc_elf_finish_dynamic_sections, but we
6427 must add the entries now so that we get the correct size for
6428 the .dynamic section. The DT_DEBUG entry is filled in by the
6429 dynamic linker and used by the debugger. */
6430 #define add_dynamic_entry(TAG, VAL) \
6431 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6432
6433 if (info->executable)
6434 {
6435 if (!add_dynamic_entry (DT_DEBUG, 0))
6436 return FALSE;
6437 }
6438
6439 if (htab->plt != NULL && htab->plt->size != 0)
6440 {
6441 if (!add_dynamic_entry (DT_PLTGOT, 0)
6442 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6443 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6444 || !add_dynamic_entry (DT_JMPREL, 0))
6445 return FALSE;
6446 }
6447
6448 if (htab->glink != NULL && htab->glink->size != 0)
6449 {
6450 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6451 return FALSE;
6452 if (!htab->no_tls_get_addr_opt
6453 && htab->tls_get_addr != NULL
6454 && htab->tls_get_addr->plt.plist != NULL
6455 && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
6456 return FALSE;
6457 }
6458
6459 if (relocs)
6460 {
6461 if (!add_dynamic_entry (DT_RELA, 0)
6462 || !add_dynamic_entry (DT_RELASZ, 0)
6463 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6464 return FALSE;
6465 }
6466
6467 /* If any dynamic relocs apply to a read-only section, then we
6468 need a DT_TEXTREL entry. */
6469 if ((info->flags & DF_TEXTREL) == 0)
6470 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6471 info);
6472
6473 if ((info->flags & DF_TEXTREL) != 0)
6474 {
6475 if (!add_dynamic_entry (DT_TEXTREL, 0))
6476 return FALSE;
6477 }
6478 if (htab->is_vxworks
6479 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6480 return FALSE;
6481 }
6482 #undef add_dynamic_entry
6483
6484 if (htab->glink_eh_frame != NULL
6485 && htab->glink_eh_frame->contents != NULL)
6486 {
6487 unsigned char *p = htab->glink_eh_frame->contents;
6488 bfd_vma val;
6489
6490 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6491 /* CIE length (rewrite in case little-endian). */
6492 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6493 p += sizeof (glink_eh_frame_cie);
6494 /* FDE length. */
6495 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6496 bfd_put_32 (htab->elf.dynobj, val, p);
6497 p += 4;
6498 /* CIE pointer. */
6499 val = p - htab->glink_eh_frame->contents;
6500 bfd_put_32 (htab->elf.dynobj, val, p);
6501 p += 4;
6502 /* Offset to .glink. Set later. */
6503 p += 4;
6504 /* .glink size. */
6505 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6506 p += 4;
6507 /* Augmentation. */
6508 p += 1;
6509
6510 if (info->shared
6511 && htab->elf.dynamic_sections_created)
6512 {
6513 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6514 if (adv < 64)
6515 *p++ = DW_CFA_advance_loc + adv;
6516 else if (adv < 256)
6517 {
6518 *p++ = DW_CFA_advance_loc1;
6519 *p++ = adv;
6520 }
6521 else if (adv < 65536)
6522 {
6523 *p++ = DW_CFA_advance_loc2;
6524 bfd_put_16 (htab->elf.dynobj, adv, p);
6525 p += 2;
6526 }
6527 else
6528 {
6529 *p++ = DW_CFA_advance_loc4;
6530 bfd_put_32 (htab->elf.dynobj, adv, p);
6531 p += 4;
6532 }
6533 *p++ = DW_CFA_register;
6534 *p++ = 65;
6535 p++;
6536 *p++ = DW_CFA_advance_loc + 4;
6537 *p++ = DW_CFA_restore_extended;
6538 *p++ = 65;
6539 }
6540 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6541 == htab->glink_eh_frame->size);
6542 }
6543
6544 return TRUE;
6545 }
6546
6547 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6548
6549 static bfd_boolean
6550 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6551 {
6552 if (h->plt.plist != NULL
6553 && !h->def_regular
6554 && (!h->pointer_equality_needed
6555 || !h->ref_regular_nonweak))
6556 return FALSE;
6557
6558 return _bfd_elf_hash_symbol (h);
6559 }
6560 \f
6561 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6562
6563 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6564 used for some functions that are allowed to break the ABI). */
6565 static const int shared_stub_entry[] =
6566 {
6567 0x7c0802a6, /* mflr 0 */
6568 0x429f0005, /* bcl 20, 31, .Lxxx */
6569 0x7d8802a6, /* mflr 12 */
6570 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6571 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
6572 0x7c0803a6, /* mtlr 0 */
6573 0x7d8903a6, /* mtctr 12 */
6574 0x4e800420, /* bctr */
6575 };
6576
6577 static const int stub_entry[] =
6578 {
6579 0x3d800000, /* lis 12,xxx@ha */
6580 0x398c0000, /* addi 12,12,xxx@l */
6581 0x7d8903a6, /* mtctr 12 */
6582 0x4e800420, /* bctr */
6583 };
6584
6585 static bfd_boolean
6586 ppc_elf_relax_section (bfd *abfd,
6587 asection *isec,
6588 struct bfd_link_info *link_info,
6589 bfd_boolean *again)
6590 {
6591 struct one_fixup
6592 {
6593 struct one_fixup *next;
6594 asection *tsec;
6595 /* Final link, can use the symbol offset. For a
6596 relocatable link we use the symbol's index. */
6597 bfd_vma toff;
6598 bfd_vma trampoff;
6599 };
6600
6601 Elf_Internal_Shdr *symtab_hdr;
6602 bfd_byte *contents = NULL;
6603 Elf_Internal_Sym *isymbuf = NULL;
6604 Elf_Internal_Rela *internal_relocs = NULL;
6605 Elf_Internal_Rela *irel, *irelend;
6606 struct one_fixup *fixups = NULL;
6607 unsigned changes = 0;
6608 struct ppc_elf_link_hash_table *htab;
6609 bfd_size_type trampoff;
6610 asection *got2;
6611 bfd_boolean maybe_pasted;
6612
6613 *again = FALSE;
6614
6615 /* Nothing to do if there are no relocations, and no need to do
6616 anything with non-alloc or non-code sections. */
6617 if ((isec->flags & SEC_ALLOC) == 0
6618 || (isec->flags & SEC_CODE) == 0
6619 || (isec->flags & SEC_RELOC) == 0
6620 || isec->reloc_count == 0)
6621 return TRUE;
6622
6623 /* We cannot represent the required PIC relocs in the output, so don't
6624 do anything. The linker doesn't support mixing -shared and -r
6625 anyway. */
6626 if (link_info->relocatable && link_info->shared)
6627 return TRUE;
6628
6629 trampoff = (isec->size + 3) & (bfd_vma) -4;
6630 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6631 || strcmp (isec->output_section->name, ".fini") == 0);
6632 /* Space for a branch around any trampolines. */
6633 if (maybe_pasted)
6634 trampoff += 4;
6635
6636 symtab_hdr = &elf_symtab_hdr (abfd);
6637
6638 /* Get a copy of the native relocations. */
6639 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6640 link_info->keep_memory);
6641 if (internal_relocs == NULL)
6642 goto error_return;
6643
6644 htab = ppc_elf_hash_table (link_info);
6645 got2 = bfd_get_section_by_name (abfd, ".got2");
6646
6647 irelend = internal_relocs + isec->reloc_count;
6648 for (irel = internal_relocs; irel < irelend; irel++)
6649 {
6650 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6651 bfd_vma toff, roff;
6652 asection *tsec;
6653 struct one_fixup *f;
6654 size_t insn_offset = 0;
6655 bfd_vma max_branch_offset, val;
6656 bfd_byte *hit_addr;
6657 unsigned long t0;
6658 struct elf_link_hash_entry *h;
6659 struct plt_entry **plist;
6660 unsigned char sym_type;
6661
6662 switch (r_type)
6663 {
6664 case R_PPC_REL24:
6665 case R_PPC_LOCAL24PC:
6666 case R_PPC_PLTREL24:
6667 max_branch_offset = 1 << 25;
6668 break;
6669
6670 case R_PPC_REL14:
6671 case R_PPC_REL14_BRTAKEN:
6672 case R_PPC_REL14_BRNTAKEN:
6673 max_branch_offset = 1 << 15;
6674 break;
6675
6676 default:
6677 continue;
6678 }
6679
6680 /* Get the value of the symbol referred to by the reloc. */
6681 h = NULL;
6682 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6683 {
6684 /* A local symbol. */
6685 Elf_Internal_Sym *isym;
6686
6687 /* Read this BFD's local symbols. */
6688 if (isymbuf == NULL)
6689 {
6690 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6691 if (isymbuf == NULL)
6692 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6693 symtab_hdr->sh_info, 0,
6694 NULL, NULL, NULL);
6695 if (isymbuf == 0)
6696 goto error_return;
6697 }
6698 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6699 if (isym->st_shndx == SHN_UNDEF)
6700 tsec = bfd_und_section_ptr;
6701 else if (isym->st_shndx == SHN_ABS)
6702 tsec = bfd_abs_section_ptr;
6703 else if (isym->st_shndx == SHN_COMMON)
6704 tsec = bfd_com_section_ptr;
6705 else
6706 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6707
6708 toff = isym->st_value;
6709 sym_type = ELF_ST_TYPE (isym->st_info);
6710 }
6711 else
6712 {
6713 /* Global symbol handling. */
6714 unsigned long indx;
6715
6716 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6717 h = elf_sym_hashes (abfd)[indx];
6718
6719 while (h->root.type == bfd_link_hash_indirect
6720 || h->root.type == bfd_link_hash_warning)
6721 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6722
6723 if (h->root.type == bfd_link_hash_defined
6724 || h->root.type == bfd_link_hash_defweak)
6725 {
6726 tsec = h->root.u.def.section;
6727 toff = h->root.u.def.value;
6728 }
6729 else if (h->root.type == bfd_link_hash_undefined
6730 || h->root.type == bfd_link_hash_undefweak)
6731 {
6732 tsec = bfd_und_section_ptr;
6733 toff = link_info->relocatable ? indx : 0;
6734 }
6735 else
6736 continue;
6737
6738 sym_type = h->type;
6739 }
6740
6741 /* The condition here under which we call find_plt_ent must
6742 match that in relocate_section. If we call find_plt_ent here
6743 but not in relocate_section, or vice versa, then the branch
6744 destination used here may be incorrect. */
6745 plist = NULL;
6746 if (h != NULL)
6747 {
6748 /* We know is_branch_reloc (r_type) is true. */
6749 if (h->type == STT_GNU_IFUNC
6750 || r_type == R_PPC_PLTREL24)
6751 plist = &h->plt.plist;
6752 }
6753 else if (sym_type == STT_GNU_IFUNC
6754 && elf_local_got_offsets (abfd) != NULL)
6755 {
6756 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6757 struct plt_entry **local_plt = (struct plt_entry **)
6758 (local_got_offsets + symtab_hdr->sh_info);
6759 plist = local_plt + ELF32_R_SYM (irel->r_info);
6760 }
6761 if (plist != NULL)
6762 {
6763 bfd_vma addend = 0;
6764 struct plt_entry *ent;
6765
6766 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6767 addend = irel->r_addend;
6768 ent = find_plt_ent (plist, got2, addend);
6769 if (ent != NULL)
6770 {
6771 if (htab->plt_type == PLT_NEW
6772 || h == NULL
6773 || !htab->elf.dynamic_sections_created
6774 || h->dynindx == -1)
6775 {
6776 tsec = htab->glink;
6777 toff = ent->glink_offset;
6778 }
6779 else
6780 {
6781 tsec = htab->plt;
6782 toff = ent->plt.offset;
6783 }
6784 }
6785 }
6786
6787 /* If the branch and target are in the same section, you have
6788 no hope of adding stubs. We'll error out later should the
6789 branch overflow. */
6790 if (tsec == isec)
6791 continue;
6792
6793 /* There probably isn't any reason to handle symbols in
6794 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6795 attribute for a code section, and we are only looking at
6796 branches. However, implement it correctly here as a
6797 reference for other target relax_section functions. */
6798 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6799 {
6800 /* At this stage in linking, no SEC_MERGE symbol has been
6801 adjusted, so all references to such symbols need to be
6802 passed through _bfd_merged_section_offset. (Later, in
6803 relocate_section, all SEC_MERGE symbols *except* for
6804 section symbols have been adjusted.)
6805
6806 gas may reduce relocations against symbols in SEC_MERGE
6807 sections to a relocation against the section symbol when
6808 the original addend was zero. When the reloc is against
6809 a section symbol we should include the addend in the
6810 offset passed to _bfd_merged_section_offset, since the
6811 location of interest is the original symbol. On the
6812 other hand, an access to "sym+addend" where "sym" is not
6813 a section symbol should not include the addend; Such an
6814 access is presumed to be an offset from "sym"; The
6815 location of interest is just "sym". */
6816 if (sym_type == STT_SECTION)
6817 toff += irel->r_addend;
6818
6819 toff = _bfd_merged_section_offset (abfd, &tsec,
6820 elf_section_data (tsec)->sec_info,
6821 toff);
6822
6823 if (sym_type != STT_SECTION)
6824 toff += irel->r_addend;
6825 }
6826 /* PLTREL24 addends are special. */
6827 else if (r_type != R_PPC_PLTREL24)
6828 toff += irel->r_addend;
6829
6830 /* Attempted -shared link of non-pic code loses. */
6831 if (tsec->output_section == NULL)
6832 continue;
6833
6834 roff = irel->r_offset;
6835
6836 /* If the branch is in range, no need to do anything. */
6837 if (tsec != bfd_und_section_ptr
6838 && (!link_info->relocatable
6839 /* A relocatable link may have sections moved during
6840 final link, so do not presume they remain in range. */
6841 || tsec->output_section == isec->output_section))
6842 {
6843 bfd_vma symaddr, reladdr;
6844
6845 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6846 reladdr = isec->output_section->vma + isec->output_offset + roff;
6847 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6848 continue;
6849 }
6850
6851 /* Look for an existing fixup to this address. */
6852 for (f = fixups; f ; f = f->next)
6853 if (f->tsec == tsec && f->toff == toff)
6854 break;
6855
6856 if (f == NULL)
6857 {
6858 size_t size;
6859 unsigned long stub_rtype;
6860
6861 val = trampoff - roff;
6862 if (val >= max_branch_offset)
6863 /* Oh dear, we can't reach a trampoline. Don't try to add
6864 one. We'll report an error later. */
6865 continue;
6866
6867 if (link_info->shared)
6868 {
6869 size = 4 * ARRAY_SIZE (shared_stub_entry);
6870 insn_offset = 12;
6871 }
6872 else
6873 {
6874 size = 4 * ARRAY_SIZE (stub_entry);
6875 insn_offset = 0;
6876 }
6877 stub_rtype = R_PPC_RELAX;
6878 if (tsec == htab->plt
6879 || tsec == htab->glink)
6880 {
6881 stub_rtype = R_PPC_RELAX_PLT;
6882 if (r_type == R_PPC_PLTREL24)
6883 stub_rtype = R_PPC_RELAX_PLTREL24;
6884 }
6885
6886 /* Hijack the old relocation. Since we need two
6887 relocations for this use a "composite" reloc. */
6888 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6889 stub_rtype);
6890 irel->r_offset = trampoff + insn_offset;
6891 if (r_type == R_PPC_PLTREL24
6892 && stub_rtype != R_PPC_RELAX_PLTREL24)
6893 irel->r_addend = 0;
6894
6895 /* Record the fixup so we don't do it again this section. */
6896 f = bfd_malloc (sizeof (*f));
6897 f->next = fixups;
6898 f->tsec = tsec;
6899 f->toff = toff;
6900 f->trampoff = trampoff;
6901 fixups = f;
6902
6903 trampoff += size;
6904 changes++;
6905 }
6906 else
6907 {
6908 val = f->trampoff - roff;
6909 if (val >= max_branch_offset)
6910 continue;
6911
6912 /* Nop out the reloc, since we're finalizing things here. */
6913 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6914 }
6915
6916 /* Get the section contents. */
6917 if (contents == NULL)
6918 {
6919 /* Get cached copy if it exists. */
6920 if (elf_section_data (isec)->this_hdr.contents != NULL)
6921 contents = elf_section_data (isec)->this_hdr.contents;
6922 else
6923 {
6924 /* Go get them off disk. */
6925 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6926 goto error_return;
6927 }
6928 }
6929
6930 /* Fix up the existing branch to hit the trampoline. */
6931 hit_addr = contents + roff;
6932 switch (r_type)
6933 {
6934 case R_PPC_REL24:
6935 case R_PPC_LOCAL24PC:
6936 case R_PPC_PLTREL24:
6937 t0 = bfd_get_32 (abfd, hit_addr);
6938 t0 &= ~0x3fffffc;
6939 t0 |= val & 0x3fffffc;
6940 bfd_put_32 (abfd, t0, hit_addr);
6941 break;
6942
6943 case R_PPC_REL14:
6944 case R_PPC_REL14_BRTAKEN:
6945 case R_PPC_REL14_BRNTAKEN:
6946 t0 = bfd_get_32 (abfd, hit_addr);
6947 t0 &= ~0xfffc;
6948 t0 |= val & 0xfffc;
6949 bfd_put_32 (abfd, t0, hit_addr);
6950 break;
6951 }
6952 }
6953
6954 /* Write out the trampolines. */
6955 if (fixups != NULL)
6956 {
6957 const int *stub;
6958 bfd_byte *dest;
6959 int i, size;
6960
6961 do
6962 {
6963 struct one_fixup *f = fixups;
6964 fixups = fixups->next;
6965 free (f);
6966 }
6967 while (fixups);
6968
6969 contents = bfd_realloc_or_free (contents, trampoff);
6970 if (contents == NULL)
6971 goto error_return;
6972
6973 isec->size = (isec->size + 3) & (bfd_vma) -4;
6974 dest = contents + isec->size;
6975 /* Branch around the trampolines. */
6976 if (maybe_pasted)
6977 {
6978 bfd_vma val = B + trampoff - isec->size;
6979 bfd_put_32 (abfd, val, dest);
6980 dest += 4;
6981 }
6982 isec->size = trampoff;
6983
6984 if (link_info->shared)
6985 {
6986 stub = shared_stub_entry;
6987 size = ARRAY_SIZE (shared_stub_entry);
6988 }
6989 else
6990 {
6991 stub = stub_entry;
6992 size = ARRAY_SIZE (stub_entry);
6993 }
6994
6995 i = 0;
6996 while (dest < contents + trampoff)
6997 {
6998 bfd_put_32 (abfd, stub[i], dest);
6999 i++;
7000 if (i == size)
7001 i = 0;
7002 dest += 4;
7003 }
7004 BFD_ASSERT (i == 0);
7005 }
7006
7007 if (isymbuf != NULL
7008 && symtab_hdr->contents != (unsigned char *) isymbuf)
7009 {
7010 if (! link_info->keep_memory)
7011 free (isymbuf);
7012 else
7013 {
7014 /* Cache the symbols for elf_link_input_bfd. */
7015 symtab_hdr->contents = (unsigned char *) isymbuf;
7016 }
7017 }
7018
7019 if (contents != NULL
7020 && elf_section_data (isec)->this_hdr.contents != contents)
7021 {
7022 if (!changes && !link_info->keep_memory)
7023 free (contents);
7024 else
7025 {
7026 /* Cache the section contents for elf_link_input_bfd. */
7027 elf_section_data (isec)->this_hdr.contents = contents;
7028 }
7029 }
7030
7031 if (changes != 0)
7032 {
7033 /* Append sufficient NOP relocs so we can write out relocation
7034 information for the trampolines. */
7035 Elf_Internal_Shdr *rel_hdr;
7036 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7037 * sizeof (*new_relocs));
7038 unsigned ix;
7039
7040 if (!new_relocs)
7041 goto error_return;
7042 memcpy (new_relocs, internal_relocs,
7043 isec->reloc_count * sizeof (*new_relocs));
7044 for (ix = changes; ix--;)
7045 {
7046 irel = new_relocs + ix + isec->reloc_count;
7047
7048 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7049 }
7050 if (internal_relocs != elf_section_data (isec)->relocs)
7051 free (internal_relocs);
7052 elf_section_data (isec)->relocs = new_relocs;
7053 isec->reloc_count += changes;
7054 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7055 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7056 }
7057 else if (elf_section_data (isec)->relocs != internal_relocs)
7058 free (internal_relocs);
7059
7060 *again = changes != 0;
7061 if (!*again && link_info->relocatable)
7062 {
7063 /* Convert the internal relax relocs to external form. */
7064 for (irel = internal_relocs; irel < irelend; irel++)
7065 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
7066 {
7067 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
7068
7069 /* Rewrite the reloc and convert one of the trailing nop
7070 relocs to describe this relocation. */
7071 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
7072 /* The relocs are at the bottom 2 bytes */
7073 irel[0].r_offset += 2;
7074 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
7075 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7076 irel[1].r_offset += 4;
7077 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7078 irel++;
7079 }
7080 }
7081
7082 return TRUE;
7083
7084 error_return:
7085 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7086 free (isymbuf);
7087 if (contents != NULL
7088 && elf_section_data (isec)->this_hdr.contents != contents)
7089 free (contents);
7090 if (internal_relocs != NULL
7091 && elf_section_data (isec)->relocs != internal_relocs)
7092 free (internal_relocs);
7093 return FALSE;
7094 }
7095 \f
7096 /* What to do when ld finds relocations against symbols defined in
7097 discarded sections. */
7098
7099 static unsigned int
7100 ppc_elf_action_discarded (asection *sec)
7101 {
7102 if (strcmp (".fixup", sec->name) == 0)
7103 return 0;
7104
7105 if (strcmp (".got2", sec->name) == 0)
7106 return 0;
7107
7108 return _bfd_elf_default_action_discarded (sec);
7109 }
7110 \f
7111 /* Fill in the address for a pointer generated in a linker section. */
7112
7113 static bfd_vma
7114 elf_finish_pointer_linker_section (bfd *input_bfd,
7115 elf_linker_section_t *lsect,
7116 struct elf_link_hash_entry *h,
7117 bfd_vma relocation,
7118 const Elf_Internal_Rela *rel)
7119 {
7120 elf_linker_section_pointers_t *linker_section_ptr;
7121
7122 BFD_ASSERT (lsect != NULL);
7123
7124 if (h != NULL)
7125 {
7126 /* Handle global symbol. */
7127 struct ppc_elf_link_hash_entry *eh;
7128
7129 eh = (struct ppc_elf_link_hash_entry *) h;
7130 BFD_ASSERT (eh->elf.def_regular);
7131 linker_section_ptr = eh->linker_section_pointer;
7132 }
7133 else
7134 {
7135 /* Handle local symbol. */
7136 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7137
7138 BFD_ASSERT (is_ppc_elf (input_bfd));
7139 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7140 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7141 }
7142
7143 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7144 rel->r_addend,
7145 lsect);
7146 BFD_ASSERT (linker_section_ptr != NULL);
7147
7148 /* Offset will always be a multiple of four, so use the bottom bit
7149 as a "written" flag. */
7150 if ((linker_section_ptr->offset & 1) == 0)
7151 {
7152 bfd_put_32 (lsect->section->owner,
7153 relocation + linker_section_ptr->addend,
7154 lsect->section->contents + linker_section_ptr->offset);
7155 linker_section_ptr->offset += 1;
7156 }
7157
7158 relocation = (lsect->section->output_section->vma
7159 + lsect->section->output_offset
7160 + linker_section_ptr->offset - 1
7161 - SYM_VAL (lsect->sym));
7162
7163 #ifdef DEBUG
7164 fprintf (stderr,
7165 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7166 lsect->name, (long) relocation, (long) relocation);
7167 #endif
7168
7169 return relocation;
7170 }
7171
7172 #define PPC_LO(v) ((v) & 0xffff)
7173 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7174 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7175
7176 static void
7177 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7178 struct bfd_link_info *info)
7179 {
7180 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7181 bfd *output_bfd = info->output_bfd;
7182 bfd_vma plt;
7183
7184 plt = ((ent->plt.offset & ~1)
7185 + plt_sec->output_section->vma
7186 + plt_sec->output_offset);
7187
7188 if (info->shared)
7189 {
7190 bfd_vma got = 0;
7191
7192 if (ent->addend >= 32768)
7193 got = (ent->addend
7194 + ent->sec->output_section->vma
7195 + ent->sec->output_offset);
7196 else if (htab->elf.hgot != NULL)
7197 got = SYM_VAL (htab->elf.hgot);
7198
7199 plt -= got;
7200
7201 if (plt + 0x8000 < 0x10000)
7202 {
7203 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7204 p += 4;
7205 bfd_put_32 (output_bfd, MTCTR_11, p);
7206 p += 4;
7207 bfd_put_32 (output_bfd, BCTR, p);
7208 p += 4;
7209 bfd_put_32 (output_bfd, NOP, p);
7210 p += 4;
7211 }
7212 else
7213 {
7214 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7215 p += 4;
7216 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7217 p += 4;
7218 bfd_put_32 (output_bfd, MTCTR_11, p);
7219 p += 4;
7220 bfd_put_32 (output_bfd, BCTR, p);
7221 p += 4;
7222 }
7223 }
7224 else
7225 {
7226 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7227 p += 4;
7228 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7229 p += 4;
7230 bfd_put_32 (output_bfd, MTCTR_11, p);
7231 p += 4;
7232 bfd_put_32 (output_bfd, BCTR, p);
7233 p += 4;
7234 }
7235 }
7236
7237 /* Return true if symbol is defined statically. */
7238
7239 static bfd_boolean
7240 is_static_defined (struct elf_link_hash_entry *h)
7241 {
7242 return ((h->root.type == bfd_link_hash_defined
7243 || h->root.type == bfd_link_hash_defweak)
7244 && h->root.u.def.section != NULL
7245 && h->root.u.def.section->output_section != NULL);
7246 }
7247
7248 /* If INSN is an opcode that may be used with an @tls operand, return
7249 the transformed insn for TLS optimisation, otherwise return 0. If
7250 REG is non-zero only match an insn with RB or RA equal to REG. */
7251
7252 unsigned int
7253 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7254 {
7255 unsigned int rtra;
7256
7257 if ((insn & (0x3f << 26)) != 31 << 26)
7258 return 0;
7259
7260 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7261 rtra = insn & ((1 << 26) - (1 << 16));
7262 else if (((insn >> 16) & 0x1f) == reg)
7263 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7264 else
7265 return 0;
7266
7267 if ((insn & (0x3ff << 1)) == 266 << 1)
7268 /* add -> addi. */
7269 insn = 14 << 26;
7270 else if ((insn & (0x1f << 1)) == 23 << 1
7271 && ((insn & (0x1f << 6)) < 14 << 6
7272 || ((insn & (0x1f << 6)) >= 16 << 6
7273 && (insn & (0x1f << 6)) < 24 << 6)))
7274 /* load and store indexed -> dform. */
7275 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7276 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7277 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7278 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7279 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7280 /* lwax -> lwa. */
7281 insn = (58 << 26) | 2;
7282 else
7283 return 0;
7284 insn |= rtra;
7285 return insn;
7286 }
7287
7288 /* If INSN is an opcode that may be used with an @tprel operand, return
7289 the transformed insn for an undefined weak symbol, ie. with the
7290 thread pointer REG operand removed. Otherwise return 0. */
7291
7292 unsigned int
7293 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7294 {
7295 if ((insn & (0x1f << 16)) == reg << 16
7296 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7297 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7298 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7299 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7300 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7301 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7302 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7303 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7304 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7305 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7306 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7307 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7308 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7309 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7310 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7311 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7312 && (insn & 3) != 1)
7313 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7314 && ((insn & 3) == 0 || (insn & 3) == 3))))
7315 {
7316 insn &= ~(0x1f << 16);
7317 }
7318 else if ((insn & (0x1f << 21)) == reg << 21
7319 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7320 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7321 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7322 {
7323 insn &= ~(0x1f << 21);
7324 insn |= (insn & (0x1f << 16)) << 5;
7325 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7326 insn -= 2 >> 26; /* convert to ori,oris */
7327 }
7328 else
7329 insn = 0;
7330 return insn;
7331 }
7332
7333 static bfd_boolean
7334 is_insn_ds_form (unsigned int insn)
7335 {
7336 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7337 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7338 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7339 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7340 }
7341
7342 static bfd_boolean
7343 is_insn_dq_form (unsigned int insn)
7344 {
7345 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7346 }
7347
7348 /* The RELOCATE_SECTION function is called by the ELF backend linker
7349 to handle the relocations for a section.
7350
7351 The relocs are always passed as Rela structures; if the section
7352 actually uses Rel structures, the r_addend field will always be
7353 zero.
7354
7355 This function is responsible for adjust the section contents as
7356 necessary, and (if using Rela relocs and generating a
7357 relocatable output file) adjusting the reloc addend as
7358 necessary.
7359
7360 This function does not have to worry about setting the reloc
7361 address or the reloc symbol index.
7362
7363 LOCAL_SYMS is a pointer to the swapped in local symbols.
7364
7365 LOCAL_SECTIONS is an array giving the section in the input file
7366 corresponding to the st_shndx field of each local symbol.
7367
7368 The global hash table entry for the global symbols can be found
7369 via elf_sym_hashes (input_bfd).
7370
7371 When generating relocatable output, this function must handle
7372 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7373 going to be the section symbol corresponding to the output
7374 section, which means that the addend must be adjusted
7375 accordingly. */
7376
7377 static bfd_boolean
7378 ppc_elf_relocate_section (bfd *output_bfd,
7379 struct bfd_link_info *info,
7380 bfd *input_bfd,
7381 asection *input_section,
7382 bfd_byte *contents,
7383 Elf_Internal_Rela *relocs,
7384 Elf_Internal_Sym *local_syms,
7385 asection **local_sections)
7386 {
7387 Elf_Internal_Shdr *symtab_hdr;
7388 struct elf_link_hash_entry **sym_hashes;
7389 struct ppc_elf_link_hash_table *htab;
7390 Elf_Internal_Rela *rel;
7391 Elf_Internal_Rela *relend;
7392 Elf_Internal_Rela outrel;
7393 asection *got2, *sreloc = NULL;
7394 bfd_vma *local_got_offsets;
7395 bfd_boolean ret = TRUE;
7396 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7397 bfd_boolean is_vxworks_tls;
7398
7399 #ifdef DEBUG
7400 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7401 "%ld relocations%s",
7402 input_bfd, input_section,
7403 (long) input_section->reloc_count,
7404 (info->relocatable) ? " (relocatable)" : "");
7405 #endif
7406
7407 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7408
7409 /* Initialize howto table if not already done. */
7410 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7411 ppc_elf_howto_init ();
7412
7413 htab = ppc_elf_hash_table (info);
7414 local_got_offsets = elf_local_got_offsets (input_bfd);
7415 symtab_hdr = &elf_symtab_hdr (input_bfd);
7416 sym_hashes = elf_sym_hashes (input_bfd);
7417 /* We have to handle relocations in vxworks .tls_vars sections
7418 specially, because the dynamic loader is 'weird'. */
7419 is_vxworks_tls = (htab->is_vxworks && info->shared
7420 && !strcmp (input_section->output_section->name,
7421 ".tls_vars"));
7422 rel = relocs;
7423 relend = relocs + input_section->reloc_count;
7424 for (; rel < relend; rel++)
7425 {
7426 enum elf_ppc_reloc_type r_type;
7427 bfd_vma addend;
7428 bfd_reloc_status_type r;
7429 Elf_Internal_Sym *sym;
7430 asection *sec;
7431 struct elf_link_hash_entry *h;
7432 const char *sym_name;
7433 reloc_howto_type *howto;
7434 unsigned long r_symndx;
7435 bfd_vma relocation;
7436 bfd_vma branch_bit, from;
7437 bfd_boolean unresolved_reloc;
7438 bfd_boolean warned;
7439 unsigned int tls_type, tls_mask, tls_gd;
7440 struct plt_entry **ifunc;
7441
7442 r_type = ELF32_R_TYPE (rel->r_info);
7443 sym = NULL;
7444 sec = NULL;
7445 h = NULL;
7446 unresolved_reloc = FALSE;
7447 warned = FALSE;
7448 r_symndx = ELF32_R_SYM (rel->r_info);
7449
7450 if (r_symndx < symtab_hdr->sh_info)
7451 {
7452 sym = local_syms + r_symndx;
7453 sec = local_sections[r_symndx];
7454 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7455
7456 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7457 }
7458 else
7459 {
7460 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7461 r_symndx, symtab_hdr, sym_hashes,
7462 h, sec, relocation,
7463 unresolved_reloc, warned);
7464
7465 sym_name = h->root.root.string;
7466 }
7467
7468 if (sec != NULL && discarded_section (sec))
7469 {
7470 /* For relocs against symbols from removed linkonce sections,
7471 or sections discarded by a linker script, we just want the
7472 section contents zeroed. Avoid any special processing. */
7473 howto = NULL;
7474 if (r_type < R_PPC_max)
7475 howto = ppc_elf_howto_table[r_type];
7476 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7477 rel, 1, relend, howto, 0, contents);
7478 }
7479
7480 if (info->relocatable)
7481 {
7482 if (got2 != NULL
7483 && r_type == R_PPC_PLTREL24
7484 && rel->r_addend != 0)
7485 {
7486 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7487 addend specifies the GOT pointer offset within .got2. */
7488 rel->r_addend += got2->output_offset;
7489 }
7490 continue;
7491 }
7492
7493 /* TLS optimizations. Replace instruction sequences and relocs
7494 based on information we collected in tls_optimize. We edit
7495 RELOCS so that --emit-relocs will output something sensible
7496 for the final instruction stream. */
7497 tls_mask = 0;
7498 tls_gd = 0;
7499 if (h != NULL)
7500 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7501 else if (local_got_offsets != NULL)
7502 {
7503 struct plt_entry **local_plt;
7504 char *lgot_masks;
7505 local_plt
7506 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7507 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7508 tls_mask = lgot_masks[r_symndx];
7509 }
7510
7511 /* Ensure reloc mapping code below stays sane. */
7512 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7513 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7514 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7515 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7516 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7517 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7518 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7519 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7520 abort ();
7521 switch (r_type)
7522 {
7523 default:
7524 break;
7525
7526 case R_PPC_GOT_TPREL16:
7527 case R_PPC_GOT_TPREL16_LO:
7528 if ((tls_mask & TLS_TLS) != 0
7529 && (tls_mask & TLS_TPREL) == 0)
7530 {
7531 bfd_vma insn;
7532
7533 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7534 insn &= 31 << 21;
7535 insn |= 0x3c020000; /* addis 0,2,0 */
7536 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7537 r_type = R_PPC_TPREL16_HA;
7538 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7539 }
7540 break;
7541
7542 case R_PPC_TLS:
7543 if ((tls_mask & TLS_TLS) != 0
7544 && (tls_mask & TLS_TPREL) == 0)
7545 {
7546 bfd_vma insn;
7547
7548 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7549 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7550 if (insn == 0)
7551 abort ();
7552 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7553 r_type = R_PPC_TPREL16_LO;
7554 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7555
7556 /* Was PPC_TLS which sits on insn boundary, now
7557 PPC_TPREL16_LO which is at low-order half-word. */
7558 rel->r_offset += d_offset;
7559 }
7560 break;
7561
7562 case R_PPC_GOT_TLSGD16_HI:
7563 case R_PPC_GOT_TLSGD16_HA:
7564 tls_gd = TLS_TPRELGD;
7565 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7566 goto tls_gdld_hi;
7567 break;
7568
7569 case R_PPC_GOT_TLSLD16_HI:
7570 case R_PPC_GOT_TLSLD16_HA:
7571 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7572 {
7573 tls_gdld_hi:
7574 if ((tls_mask & tls_gd) != 0)
7575 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7576 + R_PPC_GOT_TPREL16);
7577 else
7578 {
7579 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7580 rel->r_offset -= d_offset;
7581 r_type = R_PPC_NONE;
7582 }
7583 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7584 }
7585 break;
7586
7587 case R_PPC_GOT_TLSGD16:
7588 case R_PPC_GOT_TLSGD16_LO:
7589 tls_gd = TLS_TPRELGD;
7590 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7591 goto tls_ldgd_opt;
7592 break;
7593
7594 case R_PPC_GOT_TLSLD16:
7595 case R_PPC_GOT_TLSLD16_LO:
7596 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7597 {
7598 unsigned int insn1, insn2;
7599 bfd_vma offset;
7600
7601 tls_ldgd_opt:
7602 offset = (bfd_vma) -1;
7603 /* If not using the newer R_PPC_TLSGD/LD to mark
7604 __tls_get_addr calls, we must trust that the call
7605 stays with its arg setup insns, ie. that the next
7606 reloc is the __tls_get_addr call associated with
7607 the current reloc. Edit both insns. */
7608 if (input_section->has_tls_get_addr_call
7609 && rel + 1 < relend
7610 && branch_reloc_hash_match (input_bfd, rel + 1,
7611 htab->tls_get_addr))
7612 offset = rel[1].r_offset;
7613 if ((tls_mask & tls_gd) != 0)
7614 {
7615 /* IE */
7616 insn1 = bfd_get_32 (output_bfd,
7617 contents + rel->r_offset - d_offset);
7618 insn1 &= (1 << 26) - 1;
7619 insn1 |= 32 << 26; /* lwz */
7620 if (offset != (bfd_vma) -1)
7621 {
7622 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7623 insn2 = 0x7c631214; /* add 3,3,2 */
7624 bfd_put_32 (output_bfd, insn2, contents + offset);
7625 }
7626 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7627 + R_PPC_GOT_TPREL16);
7628 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7629 }
7630 else
7631 {
7632 /* LE */
7633 insn1 = 0x3c620000; /* addis 3,2,0 */
7634 if (tls_gd == 0)
7635 {
7636 /* Was an LD reloc. */
7637 for (r_symndx = 0;
7638 r_symndx < symtab_hdr->sh_info;
7639 r_symndx++)
7640 if (local_sections[r_symndx] == sec)
7641 break;
7642 if (r_symndx >= symtab_hdr->sh_info)
7643 r_symndx = STN_UNDEF;
7644 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7645 if (r_symndx != STN_UNDEF)
7646 rel->r_addend -= (local_syms[r_symndx].st_value
7647 + sec->output_offset
7648 + sec->output_section->vma);
7649 }
7650 r_type = R_PPC_TPREL16_HA;
7651 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7652 if (offset != (bfd_vma) -1)
7653 {
7654 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7655 rel[1].r_offset = offset + d_offset;
7656 rel[1].r_addend = rel->r_addend;
7657 insn2 = 0x38630000; /* addi 3,3,0 */
7658 bfd_put_32 (output_bfd, insn2, contents + offset);
7659 }
7660 }
7661 bfd_put_32 (output_bfd, insn1,
7662 contents + rel->r_offset - d_offset);
7663 if (tls_gd == 0)
7664 {
7665 /* We changed the symbol on an LD reloc. Start over
7666 in order to get h, sym, sec etc. right. */
7667 rel--;
7668 continue;
7669 }
7670 }
7671 break;
7672
7673 case R_PPC_TLSGD:
7674 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7675 {
7676 unsigned int insn2;
7677 bfd_vma offset = rel->r_offset;
7678
7679 if ((tls_mask & TLS_TPRELGD) != 0)
7680 {
7681 /* IE */
7682 r_type = R_PPC_NONE;
7683 insn2 = 0x7c631214; /* add 3,3,2 */
7684 }
7685 else
7686 {
7687 /* LE */
7688 r_type = R_PPC_TPREL16_LO;
7689 rel->r_offset += d_offset;
7690 insn2 = 0x38630000; /* addi 3,3,0 */
7691 }
7692 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7693 bfd_put_32 (output_bfd, insn2, contents + offset);
7694 /* Zap the reloc on the _tls_get_addr call too. */
7695 BFD_ASSERT (offset == rel[1].r_offset);
7696 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7697 }
7698 break;
7699
7700 case R_PPC_TLSLD:
7701 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7702 {
7703 unsigned int insn2;
7704
7705 for (r_symndx = 0;
7706 r_symndx < symtab_hdr->sh_info;
7707 r_symndx++)
7708 if (local_sections[r_symndx] == sec)
7709 break;
7710 if (r_symndx >= symtab_hdr->sh_info)
7711 r_symndx = STN_UNDEF;
7712 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7713 if (r_symndx != STN_UNDEF)
7714 rel->r_addend -= (local_syms[r_symndx].st_value
7715 + sec->output_offset
7716 + sec->output_section->vma);
7717
7718 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7719 rel->r_offset += d_offset;
7720 insn2 = 0x38630000; /* addi 3,3,0 */
7721 bfd_put_32 (output_bfd, insn2,
7722 contents + rel->r_offset - d_offset);
7723 /* Zap the reloc on the _tls_get_addr call too. */
7724 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7725 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7726 rel--;
7727 continue;
7728 }
7729 break;
7730 }
7731
7732 /* Handle other relocations that tweak non-addend part of insn. */
7733 branch_bit = 0;
7734 switch (r_type)
7735 {
7736 default:
7737 break;
7738
7739 /* Branch taken prediction relocations. */
7740 case R_PPC_ADDR14_BRTAKEN:
7741 case R_PPC_REL14_BRTAKEN:
7742 branch_bit = BRANCH_PREDICT_BIT;
7743 /* Fall thru */
7744
7745 /* Branch not taken prediction relocations. */
7746 case R_PPC_ADDR14_BRNTAKEN:
7747 case R_PPC_REL14_BRNTAKEN:
7748 {
7749 bfd_vma insn;
7750
7751 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7752 insn &= ~BRANCH_PREDICT_BIT;
7753 insn |= branch_bit;
7754
7755 from = (rel->r_offset
7756 + input_section->output_offset
7757 + input_section->output_section->vma);
7758
7759 /* Invert 'y' bit if not the default. */
7760 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7761 insn ^= BRANCH_PREDICT_BIT;
7762
7763 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7764 break;
7765 }
7766 }
7767
7768 ifunc = NULL;
7769 if (!htab->is_vxworks)
7770 {
7771 struct plt_entry *ent;
7772
7773 if (h != NULL)
7774 {
7775 if (h->type == STT_GNU_IFUNC)
7776 ifunc = &h->plt.plist;
7777 }
7778 else if (local_got_offsets != NULL
7779 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7780 {
7781 struct plt_entry **local_plt;
7782
7783 local_plt = (struct plt_entry **) (local_got_offsets
7784 + symtab_hdr->sh_info);
7785 ifunc = local_plt + r_symndx;
7786 }
7787
7788 ent = NULL;
7789 if (ifunc != NULL
7790 && (!info->shared
7791 || is_branch_reloc (r_type)))
7792 {
7793 addend = 0;
7794 if (r_type == R_PPC_PLTREL24 && info->shared)
7795 addend = rel->r_addend;
7796 ent = find_plt_ent (ifunc, got2, addend);
7797 }
7798 if (ent != NULL)
7799 {
7800 if (h == NULL && (ent->plt.offset & 1) == 0)
7801 {
7802 Elf_Internal_Rela rela;
7803 bfd_byte *loc;
7804
7805 rela.r_offset = (htab->iplt->output_section->vma
7806 + htab->iplt->output_offset
7807 + ent->plt.offset);
7808 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7809 rela.r_addend = relocation;
7810 loc = htab->reliplt->contents;
7811 loc += (htab->reliplt->reloc_count++
7812 * sizeof (Elf32_External_Rela));
7813 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7814
7815 ent->plt.offset |= 1;
7816 }
7817 if (h == NULL && (ent->glink_offset & 1) == 0)
7818 {
7819 unsigned char *p = ((unsigned char *) htab->glink->contents
7820 + ent->glink_offset);
7821 write_glink_stub (ent, htab->iplt, p, info);
7822 ent->glink_offset |= 1;
7823 }
7824
7825 unresolved_reloc = FALSE;
7826 if (htab->plt_type == PLT_NEW
7827 || !htab->elf.dynamic_sections_created
7828 || h == NULL)
7829 relocation = (htab->glink->output_section->vma
7830 + htab->glink->output_offset
7831 + (ent->glink_offset & ~1));
7832 else
7833 relocation = (htab->plt->output_section->vma
7834 + htab->plt->output_offset
7835 + ent->plt.offset);
7836 }
7837 }
7838
7839 addend = rel->r_addend;
7840 tls_type = 0;
7841 howto = NULL;
7842 if (r_type < R_PPC_max)
7843 howto = ppc_elf_howto_table[r_type];
7844 switch (r_type)
7845 {
7846 default:
7847 info->callbacks->einfo
7848 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
7849 input_bfd, (int) r_type, sym_name);
7850
7851 bfd_set_error (bfd_error_bad_value);
7852 ret = FALSE;
7853 continue;
7854
7855 case R_PPC_NONE:
7856 case R_PPC_TLS:
7857 case R_PPC_TLSGD:
7858 case R_PPC_TLSLD:
7859 case R_PPC_EMB_MRKREF:
7860 case R_PPC_GNU_VTINHERIT:
7861 case R_PPC_GNU_VTENTRY:
7862 continue;
7863
7864 /* GOT16 relocations. Like an ADDR16 using the symbol's
7865 address in the GOT as relocation value instead of the
7866 symbol's value itself. Also, create a GOT entry for the
7867 symbol and put the symbol value there. */
7868 case R_PPC_GOT_TLSGD16:
7869 case R_PPC_GOT_TLSGD16_LO:
7870 case R_PPC_GOT_TLSGD16_HI:
7871 case R_PPC_GOT_TLSGD16_HA:
7872 tls_type = TLS_TLS | TLS_GD;
7873 goto dogot;
7874
7875 case R_PPC_GOT_TLSLD16:
7876 case R_PPC_GOT_TLSLD16_LO:
7877 case R_PPC_GOT_TLSLD16_HI:
7878 case R_PPC_GOT_TLSLD16_HA:
7879 tls_type = TLS_TLS | TLS_LD;
7880 goto dogot;
7881
7882 case R_PPC_GOT_TPREL16:
7883 case R_PPC_GOT_TPREL16_LO:
7884 case R_PPC_GOT_TPREL16_HI:
7885 case R_PPC_GOT_TPREL16_HA:
7886 tls_type = TLS_TLS | TLS_TPREL;
7887 goto dogot;
7888
7889 case R_PPC_GOT_DTPREL16:
7890 case R_PPC_GOT_DTPREL16_LO:
7891 case R_PPC_GOT_DTPREL16_HI:
7892 case R_PPC_GOT_DTPREL16_HA:
7893 tls_type = TLS_TLS | TLS_DTPREL;
7894 goto dogot;
7895
7896 case R_PPC_GOT16:
7897 case R_PPC_GOT16_LO:
7898 case R_PPC_GOT16_HI:
7899 case R_PPC_GOT16_HA:
7900 tls_mask = 0;
7901 dogot:
7902 {
7903 /* Relocation is to the entry for this symbol in the global
7904 offset table. */
7905 bfd_vma off;
7906 bfd_vma *offp;
7907 unsigned long indx;
7908
7909 if (htab->got == NULL)
7910 abort ();
7911
7912 indx = 0;
7913 if (tls_type == (TLS_TLS | TLS_LD)
7914 && (h == NULL
7915 || !h->def_dynamic))
7916 offp = &htab->tlsld_got.offset;
7917 else if (h != NULL)
7918 {
7919 bfd_boolean dyn;
7920 dyn = htab->elf.dynamic_sections_created;
7921 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7922 || (info->shared
7923 && SYMBOL_REFERENCES_LOCAL (info, h)))
7924 /* This is actually a static link, or it is a
7925 -Bsymbolic link and the symbol is defined
7926 locally, or the symbol was forced to be local
7927 because of a version file. */
7928 ;
7929 else
7930 {
7931 BFD_ASSERT (h->dynindx != -1);
7932 indx = h->dynindx;
7933 unresolved_reloc = FALSE;
7934 }
7935 offp = &h->got.offset;
7936 }
7937 else
7938 {
7939 if (local_got_offsets == NULL)
7940 abort ();
7941 offp = &local_got_offsets[r_symndx];
7942 }
7943
7944 /* The offset must always be a multiple of 4. We use the
7945 least significant bit to record whether we have already
7946 processed this entry. */
7947 off = *offp;
7948 if ((off & 1) != 0)
7949 off &= ~1;
7950 else
7951 {
7952 unsigned int tls_m = (tls_mask
7953 & (TLS_LD | TLS_GD | TLS_DTPREL
7954 | TLS_TPREL | TLS_TPRELGD));
7955
7956 if (offp == &htab->tlsld_got.offset)
7957 tls_m = TLS_LD;
7958 else if (h == NULL
7959 || !h->def_dynamic)
7960 tls_m &= ~TLS_LD;
7961
7962 /* We might have multiple got entries for this sym.
7963 Initialize them all. */
7964 do
7965 {
7966 int tls_ty = 0;
7967
7968 if ((tls_m & TLS_LD) != 0)
7969 {
7970 tls_ty = TLS_TLS | TLS_LD;
7971 tls_m &= ~TLS_LD;
7972 }
7973 else if ((tls_m & TLS_GD) != 0)
7974 {
7975 tls_ty = TLS_TLS | TLS_GD;
7976 tls_m &= ~TLS_GD;
7977 }
7978 else if ((tls_m & TLS_DTPREL) != 0)
7979 {
7980 tls_ty = TLS_TLS | TLS_DTPREL;
7981 tls_m &= ~TLS_DTPREL;
7982 }
7983 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7984 {
7985 tls_ty = TLS_TLS | TLS_TPREL;
7986 tls_m = 0;
7987 }
7988
7989 /* Generate relocs for the dynamic linker. */
7990 if ((info->shared || indx != 0)
7991 && (offp == &htab->tlsld_got.offset
7992 || h == NULL
7993 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7994 || h->root.type != bfd_link_hash_undefweak))
7995 {
7996 asection *rsec = htab->relgot;
7997 bfd_byte * loc;
7998
7999 if (ifunc != NULL)
8000 rsec = htab->reliplt;
8001 outrel.r_offset = (htab->got->output_section->vma
8002 + htab->got->output_offset
8003 + off);
8004 outrel.r_addend = 0;
8005 if (tls_ty & (TLS_LD | TLS_GD))
8006 {
8007 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8008 if (tls_ty == (TLS_TLS | TLS_GD))
8009 {
8010 loc = rsec->contents;
8011 loc += (rsec->reloc_count++
8012 * sizeof (Elf32_External_Rela));
8013 bfd_elf32_swap_reloca_out (output_bfd,
8014 &outrel, loc);
8015 outrel.r_offset += 4;
8016 outrel.r_info
8017 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8018 }
8019 }
8020 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8021 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8022 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8023 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8024 else if (indx != 0)
8025 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8026 else if (ifunc != NULL)
8027 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8028 else
8029 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8030 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8031 {
8032 outrel.r_addend += relocation;
8033 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8034 outrel.r_addend -= htab->elf.tls_sec->vma;
8035 }
8036 loc = rsec->contents;
8037 loc += (rsec->reloc_count++
8038 * sizeof (Elf32_External_Rela));
8039 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8040 }
8041
8042 /* Init the .got section contents if we're not
8043 emitting a reloc. */
8044 else
8045 {
8046 bfd_vma value = relocation;
8047
8048 if (tls_ty == (TLS_TLS | TLS_LD))
8049 value = 1;
8050 else if (tls_ty != 0)
8051 {
8052 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8053 if (tls_ty == (TLS_TLS | TLS_TPREL))
8054 value += DTP_OFFSET - TP_OFFSET;
8055
8056 if (tls_ty == (TLS_TLS | TLS_GD))
8057 {
8058 bfd_put_32 (output_bfd, value,
8059 htab->got->contents + off + 4);
8060 value = 1;
8061 }
8062 }
8063 bfd_put_32 (output_bfd, value,
8064 htab->got->contents + off);
8065 }
8066
8067 off += 4;
8068 if (tls_ty & (TLS_LD | TLS_GD))
8069 off += 4;
8070 }
8071 while (tls_m != 0);
8072
8073 off = *offp;
8074 *offp = off | 1;
8075 }
8076
8077 if (off >= (bfd_vma) -2)
8078 abort ();
8079
8080 if ((tls_type & TLS_TLS) != 0)
8081 {
8082 if (tls_type != (TLS_TLS | TLS_LD))
8083 {
8084 if ((tls_mask & TLS_LD) != 0
8085 && !(h == NULL
8086 || !h->def_dynamic))
8087 off += 8;
8088 if (tls_type != (TLS_TLS | TLS_GD))
8089 {
8090 if ((tls_mask & TLS_GD) != 0)
8091 off += 8;
8092 if (tls_type != (TLS_TLS | TLS_DTPREL))
8093 {
8094 if ((tls_mask & TLS_DTPREL) != 0)
8095 off += 4;
8096 }
8097 }
8098 }
8099 }
8100
8101 relocation = (htab->got->output_section->vma
8102 + htab->got->output_offset
8103 + off
8104 - SYM_VAL (htab->elf.hgot));
8105
8106 /* Addends on got relocations don't make much sense.
8107 x+off@got is actually x@got+off, and since the got is
8108 generated by a hash table traversal, the value in the
8109 got at entry m+n bears little relation to the entry m. */
8110 if (addend != 0)
8111 info->callbacks->einfo
8112 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8113 input_bfd, input_section, rel->r_offset,
8114 howto->name,
8115 sym_name);
8116 }
8117 break;
8118
8119 /* Relocations that need no special processing. */
8120 case R_PPC_LOCAL24PC:
8121 /* It makes no sense to point a local relocation
8122 at a symbol not in this object. */
8123 if (unresolved_reloc)
8124 {
8125 if (! (*info->callbacks->undefined_symbol) (info,
8126 h->root.root.string,
8127 input_bfd,
8128 input_section,
8129 rel->r_offset,
8130 TRUE))
8131 return FALSE;
8132 continue;
8133 }
8134 break;
8135
8136 case R_PPC_DTPREL16:
8137 case R_PPC_DTPREL16_LO:
8138 case R_PPC_DTPREL16_HI:
8139 case R_PPC_DTPREL16_HA:
8140 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8141 break;
8142
8143 /* Relocations that may need to be propagated if this is a shared
8144 object. */
8145 case R_PPC_TPREL16:
8146 case R_PPC_TPREL16_LO:
8147 case R_PPC_TPREL16_HI:
8148 case R_PPC_TPREL16_HA:
8149 if (h != NULL
8150 && h->root.type == bfd_link_hash_undefweak
8151 && h->dynindx == -1)
8152 {
8153 /* Make this relocation against an undefined weak symbol
8154 resolve to zero. This is really just a tweak, since
8155 code using weak externs ought to check that they are
8156 defined before using them. */
8157 bfd_byte *p = contents + rel->r_offset - d_offset;
8158 unsigned int insn = bfd_get_32 (output_bfd, p);
8159 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8160 if (insn != 0)
8161 bfd_put_32 (output_bfd, insn, p);
8162 break;
8163 }
8164 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8165 /* The TPREL16 relocs shouldn't really be used in shared
8166 libs as they will result in DT_TEXTREL being set, but
8167 support them anyway. */
8168 goto dodyn;
8169
8170 case R_PPC_TPREL32:
8171 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8172 goto dodyn;
8173
8174 case R_PPC_DTPREL32:
8175 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8176 goto dodyn;
8177
8178 case R_PPC_DTPMOD32:
8179 relocation = 1;
8180 addend = 0;
8181 goto dodyn;
8182
8183 case R_PPC_REL16:
8184 case R_PPC_REL16_LO:
8185 case R_PPC_REL16_HI:
8186 case R_PPC_REL16_HA:
8187 break;
8188
8189 case R_PPC_REL32:
8190 if (h == NULL || h == htab->elf.hgot)
8191 break;
8192 /* fall through */
8193
8194 case R_PPC_ADDR32:
8195 case R_PPC_ADDR16:
8196 case R_PPC_ADDR16_LO:
8197 case R_PPC_ADDR16_HI:
8198 case R_PPC_ADDR16_HA:
8199 case R_PPC_UADDR32:
8200 case R_PPC_UADDR16:
8201 goto dodyn;
8202
8203 case R_PPC_VLE_REL8:
8204 case R_PPC_VLE_REL15:
8205 case R_PPC_VLE_REL24:
8206 case R_PPC_REL24:
8207 case R_PPC_REL14:
8208 case R_PPC_REL14_BRTAKEN:
8209 case R_PPC_REL14_BRNTAKEN:
8210 /* If these relocations are not to a named symbol, they can be
8211 handled right here, no need to bother the dynamic linker. */
8212 if (SYMBOL_CALLS_LOCAL (info, h)
8213 || h == htab->elf.hgot)
8214 break;
8215 /* fall through */
8216
8217 case R_PPC_ADDR24:
8218 case R_PPC_ADDR14:
8219 case R_PPC_ADDR14_BRTAKEN:
8220 case R_PPC_ADDR14_BRNTAKEN:
8221 if (h != NULL && !info->shared)
8222 break;
8223 /* fall through */
8224
8225 dodyn:
8226 if ((input_section->flags & SEC_ALLOC) == 0
8227 || is_vxworks_tls)
8228 break;
8229
8230 if ((info->shared
8231 && !(h != NULL
8232 && ((h->root.type == bfd_link_hash_undefined
8233 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8234 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8235 || (h->root.type == bfd_link_hash_undefweak
8236 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8237 && (must_be_dyn_reloc (info, r_type)
8238 || !SYMBOL_CALLS_LOCAL (info, h)))
8239 || (ELIMINATE_COPY_RELOCS
8240 && !info->shared
8241 && h != NULL
8242 && h->dynindx != -1
8243 && !h->non_got_ref
8244 && !h->def_regular))
8245 {
8246 int skip;
8247 bfd_byte * loc;
8248 #ifdef DEBUG
8249 fprintf (stderr, "ppc_elf_relocate_section needs to "
8250 "create relocation for %s\n",
8251 (h && h->root.root.string
8252 ? h->root.root.string : "<unknown>"));
8253 #endif
8254
8255 /* When generating a shared object, these relocations
8256 are copied into the output file to be resolved at run
8257 time. */
8258 if (sreloc == NULL)
8259 {
8260 sreloc = elf_section_data (input_section)->sreloc;
8261 if (!htab->elf.dynamic_sections_created)
8262 sreloc = htab->reliplt;
8263 if (sreloc == NULL)
8264 return FALSE;
8265 }
8266
8267 skip = 0;
8268 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8269 input_section,
8270 rel->r_offset);
8271 if (outrel.r_offset == (bfd_vma) -1
8272 || outrel.r_offset == (bfd_vma) -2)
8273 skip = (int) outrel.r_offset;
8274 outrel.r_offset += (input_section->output_section->vma
8275 + input_section->output_offset);
8276
8277 if (skip)
8278 memset (&outrel, 0, sizeof outrel);
8279 else if ((h != NULL
8280 && (h->root.type == bfd_link_hash_undefined
8281 || h->root.type == bfd_link_hash_undefweak))
8282 || !SYMBOL_REFERENCES_LOCAL (info, h))
8283 {
8284 BFD_ASSERT (h->dynindx != -1);
8285 unresolved_reloc = FALSE;
8286 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8287 outrel.r_addend = rel->r_addend;
8288 }
8289 else
8290 {
8291 outrel.r_addend = relocation + rel->r_addend;
8292
8293 if (r_type != R_PPC_ADDR32)
8294 {
8295 long indx = 0;
8296
8297 if (ifunc != NULL)
8298 {
8299 /* If we get here when building a static
8300 executable, then the libc startup function
8301 responsible for applying indirect function
8302 relocations is going to complain about
8303 the reloc type.
8304 If we get here when building a dynamic
8305 executable, it will be because we have
8306 a text relocation. The dynamic loader
8307 will set the text segment writable and
8308 non-executable to apply text relocations.
8309 So we'll segfault when trying to run the
8310 indirection function to resolve the reloc. */
8311 info->callbacks->einfo
8312 (_("%P: %H: relocation %s for indirect "
8313 "function %s unsupported\n"),
8314 input_bfd, input_section, rel->r_offset,
8315 howto->name,
8316 sym_name);
8317 ret = FALSE;
8318 }
8319 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8320 ;
8321 else if (sec == NULL || sec->owner == NULL)
8322 {
8323 bfd_set_error (bfd_error_bad_value);
8324 ret = FALSE;
8325 }
8326 else
8327 {
8328 asection *osec;
8329
8330 /* We are turning this relocation into one
8331 against a section symbol. It would be
8332 proper to subtract the symbol's value,
8333 osec->vma, from the emitted reloc addend,
8334 but ld.so expects buggy relocs.
8335 FIXME: Why not always use a zero index? */
8336 osec = sec->output_section;
8337 indx = elf_section_data (osec)->dynindx;
8338 if (indx == 0)
8339 {
8340 osec = htab->elf.text_index_section;
8341 indx = elf_section_data (osec)->dynindx;
8342 }
8343 BFD_ASSERT (indx != 0);
8344 #ifdef DEBUG
8345 if (indx == 0)
8346 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8347 indx, osec->name, osec->flags,
8348 h->root.root.string);
8349 #endif
8350 }
8351
8352 outrel.r_info = ELF32_R_INFO (indx, r_type);
8353 }
8354 else if (ifunc != NULL)
8355 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8356 else
8357 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8358 }
8359
8360 loc = sreloc->contents;
8361 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8362 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8363
8364 if (skip == -1)
8365 continue;
8366
8367 /* This reloc will be computed at runtime. We clear the memory
8368 so that it contains predictable value. */
8369 if (! skip
8370 && ((input_section->flags & SEC_ALLOC) != 0
8371 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8372 {
8373 relocation = howto->pc_relative ? outrel.r_offset : 0;
8374 addend = 0;
8375 break;
8376 }
8377 }
8378 break;
8379
8380 case R_PPC_RELAX_PLT:
8381 case R_PPC_RELAX_PLTREL24:
8382 if (h != NULL)
8383 {
8384 struct plt_entry *ent;
8385 bfd_vma got2_addend = 0;
8386
8387 if (r_type == R_PPC_RELAX_PLTREL24)
8388 {
8389 if (info->shared)
8390 got2_addend = addend;
8391 addend = 0;
8392 }
8393 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8394 if (htab->plt_type == PLT_NEW)
8395 relocation = (htab->glink->output_section->vma
8396 + htab->glink->output_offset
8397 + ent->glink_offset);
8398 else
8399 relocation = (htab->plt->output_section->vma
8400 + htab->plt->output_offset
8401 + ent->plt.offset);
8402 }
8403 /* Fall thru */
8404
8405 case R_PPC_RELAX:
8406 if (info->shared)
8407 relocation -= (input_section->output_section->vma
8408 + input_section->output_offset
8409 + rel->r_offset - 4);
8410
8411 {
8412 unsigned long t0;
8413 unsigned long t1;
8414
8415 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
8416 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
8417
8418 /* We're clearing the bits for R_PPC_ADDR16_HA
8419 and R_PPC_ADDR16_LO here. */
8420 t0 &= ~0xffff;
8421 t1 &= ~0xffff;
8422
8423 /* t0 is HA, t1 is LO */
8424 relocation += addend;
8425 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
8426 t1 |= relocation & 0xffff;
8427
8428 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
8429 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
8430
8431 /* Rewrite the reloc and convert one of the trailing nop
8432 relocs to describe this relocation. */
8433 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8434 /* The relocs are at the bottom 2 bytes */
8435 rel[0].r_offset += 2;
8436 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8437 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8438 rel[1].r_offset += 4;
8439 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8440 rel++;
8441 }
8442 continue;
8443
8444 /* Indirect .sdata relocation. */
8445 case R_PPC_EMB_SDAI16:
8446 BFD_ASSERT (htab->sdata[0].section != NULL);
8447 if (!is_static_defined (htab->sdata[0].sym))
8448 {
8449 unresolved_reloc = TRUE;
8450 break;
8451 }
8452 relocation
8453 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8454 h, relocation, rel);
8455 addend = 0;
8456 break;
8457
8458 /* Indirect .sdata2 relocation. */
8459 case R_PPC_EMB_SDA2I16:
8460 BFD_ASSERT (htab->sdata[1].section != NULL);
8461 if (!is_static_defined (htab->sdata[1].sym))
8462 {
8463 unresolved_reloc = TRUE;
8464 break;
8465 }
8466 relocation
8467 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8468 h, relocation, rel);
8469 addend = 0;
8470 break;
8471
8472 /* Handle the TOC16 reloc. We want to use the offset within the .got
8473 section, not the actual VMA. This is appropriate when generating
8474 an embedded ELF object, for which the .got section acts like the
8475 AIX .toc section. */
8476 case R_PPC_TOC16: /* phony GOT16 relocations */
8477 if (sec == NULL || sec->output_section == NULL)
8478 {
8479 unresolved_reloc = TRUE;
8480 break;
8481 }
8482 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8483 ".got") == 0
8484 || strcmp (bfd_get_section_name (sec->owner, sec),
8485 ".cgot") == 0);
8486
8487 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8488 break;
8489
8490 case R_PPC_PLTREL24:
8491 if (h != NULL && ifunc == NULL)
8492 {
8493 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8494 info->shared ? addend : 0);
8495 if (ent == NULL
8496 || htab->plt == NULL)
8497 {
8498 /* We didn't make a PLT entry for this symbol. This
8499 happens when statically linking PIC code, or when
8500 using -Bsymbolic. */
8501 }
8502 else
8503 {
8504 /* Relocation is to the entry for this symbol in the
8505 procedure linkage table. */
8506 unresolved_reloc = FALSE;
8507 if (htab->plt_type == PLT_NEW)
8508 relocation = (htab->glink->output_section->vma
8509 + htab->glink->output_offset
8510 + ent->glink_offset);
8511 else
8512 relocation = (htab->plt->output_section->vma
8513 + htab->plt->output_offset
8514 + ent->plt.offset);
8515 }
8516 }
8517
8518 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8519 addend specifies the GOT pointer offset within .got2.
8520 Don't apply it to the relocation field. */
8521 addend = 0;
8522 break;
8523
8524 /* Relocate against _SDA_BASE_. */
8525 case R_PPC_SDAREL16:
8526 {
8527 const char *name;
8528 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8529
8530 if (sec == NULL
8531 || sec->output_section == NULL
8532 || !is_static_defined (sda))
8533 {
8534 unresolved_reloc = TRUE;
8535 break;
8536 }
8537 addend -= SYM_VAL (sda);
8538
8539 name = bfd_get_section_name (output_bfd, sec->output_section);
8540 if (! ((CONST_STRNEQ (name, ".sdata")
8541 && (name[6] == 0 || name[6] == '.'))
8542 || (CONST_STRNEQ (name, ".sbss")
8543 && (name[5] == 0 || name[5] == '.'))))
8544 {
8545 info->callbacks->einfo
8546 (_("%P: %B: the target (%s) of a %s relocation is "
8547 "in the wrong output section (%s)\n"),
8548 input_bfd,
8549 sym_name,
8550 howto->name,
8551 name);
8552 }
8553 }
8554 break;
8555
8556 /* Relocate against _SDA2_BASE_. */
8557 case R_PPC_EMB_SDA2REL:
8558 {
8559 const char *name;
8560 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8561
8562 if (sec == NULL
8563 || sec->output_section == NULL
8564 || !is_static_defined (sda))
8565 {
8566 unresolved_reloc = TRUE;
8567 break;
8568 }
8569 addend -= SYM_VAL (sda);
8570
8571 name = bfd_get_section_name (output_bfd, sec->output_section);
8572 if (! (CONST_STRNEQ (name, ".sdata2")
8573 || CONST_STRNEQ (name, ".sbss2")))
8574 {
8575 info->callbacks->einfo
8576 (_("%P: %B: the target (%s) of a %s relocation is "
8577 "in the wrong output section (%s)\n"),
8578 input_bfd,
8579 sym_name,
8580 howto->name,
8581 name);
8582 }
8583 }
8584 break;
8585
8586 case R_PPC_VLE_LO16A:
8587 relocation = (relocation + addend) & 0xffff;
8588 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8589 relocation, split16a_type);
8590 continue;
8591
8592 case R_PPC_VLE_LO16D:
8593 relocation = (relocation + addend) & 0xffff;
8594 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8595 relocation, split16d_type);
8596 continue;
8597
8598 case R_PPC_VLE_HI16A:
8599 relocation = ((relocation + addend) >> 16) & 0xffff;
8600 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8601 relocation, split16a_type);
8602 continue;
8603
8604 case R_PPC_VLE_HI16D:
8605 relocation = ((relocation + addend) >> 16) & 0xffff;
8606 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8607 relocation, split16d_type);
8608 continue;
8609
8610 case R_PPC_VLE_HA16A:
8611 {
8612 bfd_vma value = relocation + addend;
8613 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8614 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8615 value, split16a_type);
8616 }
8617 continue;
8618
8619 case R_PPC_VLE_HA16D:
8620 {
8621 bfd_vma value = relocation + addend;
8622 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8623 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8624 value, split16d_type);
8625 }
8626 continue;
8627
8628 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8629 case R_PPC_EMB_SDA21:
8630 case R_PPC_VLE_SDA21:
8631 case R_PPC_EMB_RELSDA:
8632 case R_PPC_VLE_SDA21_LO:
8633 {
8634 const char *name;
8635 int reg;
8636 struct elf_link_hash_entry *sda = NULL;
8637
8638 if (sec == NULL || sec->output_section == NULL)
8639 {
8640 unresolved_reloc = TRUE;
8641 break;
8642 }
8643
8644 name = bfd_get_section_name (output_bfd, sec->output_section);
8645 if (((CONST_STRNEQ (name, ".sdata")
8646 && (name[6] == 0 || name[6] == '.'))
8647 || (CONST_STRNEQ (name, ".sbss")
8648 && (name[5] == 0 || name[5] == '.'))))
8649 {
8650 reg = 13;
8651 sda = htab->sdata[0].sym;
8652 }
8653 else if (CONST_STRNEQ (name, ".sdata2")
8654 || CONST_STRNEQ (name, ".sbss2"))
8655 {
8656 reg = 2;
8657 sda = htab->sdata[1].sym;
8658 }
8659 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8660 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8661 {
8662 reg = 0;
8663 }
8664 else
8665 {
8666 info->callbacks->einfo
8667 (_("%P: %B: the target (%s) of a %s relocation is "
8668 "in the wrong output section (%s)\n"),
8669 input_bfd,
8670 sym_name,
8671 howto->name,
8672 name);
8673
8674 bfd_set_error (bfd_error_bad_value);
8675 ret = FALSE;
8676 continue;
8677 }
8678
8679 if (sda != NULL)
8680 {
8681 if (!is_static_defined (sda))
8682 {
8683 unresolved_reloc = TRUE;
8684 break;
8685 }
8686 addend -= SYM_VAL (sda);
8687 }
8688
8689 if (reg == 0
8690 && (r_type == R_PPC_VLE_SDA21
8691 || r_type == R_PPC_VLE_SDA21_LO))
8692 {
8693 /* Use the split20 format. */
8694 bfd_vma insn, bits12to15, bits21to31;
8695 bfd_vma value = (relocation + rel->r_offset) & 0xffff;
8696 /* Propagate sign bit, if necessary. */
8697 insn = (value & 0x8000) ? 0x70107800 : 0x70000000;
8698 bits12to15 = value & 0x700;
8699 bits21to31 = value & 0x7ff;
8700 insn |= bits12to15;
8701 insn |= bits21to31;
8702 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8703 continue;
8704 }
8705 else if (r_type == R_PPC_EMB_SDA21
8706 || r_type == R_PPC_VLE_SDA21
8707 || r_type == R_PPC_VLE_SDA21_LO)
8708 {
8709 bfd_vma insn; /* Fill in register field. */
8710
8711 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8712 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8713 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8714 }
8715 }
8716 break;
8717
8718 case R_PPC_VLE_SDAREL_LO16A:
8719 case R_PPC_VLE_SDAREL_LO16D:
8720 case R_PPC_VLE_SDAREL_HI16A:
8721 case R_PPC_VLE_SDAREL_HI16D:
8722 case R_PPC_VLE_SDAREL_HA16A:
8723 case R_PPC_VLE_SDAREL_HA16D:
8724 {
8725 bfd_vma value;
8726 const char *name;
8727 //int reg;
8728 struct elf_link_hash_entry *sda = NULL;
8729
8730 if (sec == NULL || sec->output_section == NULL)
8731 {
8732 unresolved_reloc = TRUE;
8733 break;
8734 }
8735
8736 name = bfd_get_section_name (output_bfd, sec->output_section);
8737 if (((CONST_STRNEQ (name, ".sdata")
8738 && (name[6] == 0 || name[6] == '.'))
8739 || (CONST_STRNEQ (name, ".sbss")
8740 && (name[5] == 0 || name[5] == '.'))))
8741 {
8742 //reg = 13;
8743 sda = htab->sdata[0].sym;
8744 }
8745 else if (CONST_STRNEQ (name, ".sdata2")
8746 || CONST_STRNEQ (name, ".sbss2"))
8747 {
8748 //reg = 2;
8749 sda = htab->sdata[1].sym;
8750 }
8751 else
8752 {
8753 (*_bfd_error_handler)
8754 (_("%B: the target (%s) of a %s relocation is "
8755 "in the wrong output section (%s)"),
8756 input_bfd,
8757 sym_name,
8758 howto->name,
8759 name);
8760
8761 bfd_set_error (bfd_error_bad_value);
8762 ret = FALSE;
8763 continue;
8764 }
8765
8766 if (sda != NULL)
8767 {
8768 if (!is_static_defined (sda))
8769 {
8770 unresolved_reloc = TRUE;
8771 break;
8772 }
8773 }
8774
8775 value = sda->root.u.def.section->output_section->vma
8776 + sda->root.u.def.section->output_offset;
8777
8778 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8779 {
8780 value = (value + addend) & 0xffff;
8781 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8782 value, split16a_type);
8783 }
8784 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8785 {
8786 value = (value + addend) & 0xffff;
8787 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8788 value, split16d_type);
8789 }
8790 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8791 {
8792 value = ((value + addend) >> 16) & 0xffff;
8793 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8794 value, split16a_type);
8795 }
8796 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8797 {
8798 value = ((value + addend) >> 16) & 0xffff;
8799 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8800 value, split16d_type);
8801 }
8802 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8803 {
8804 value += addend;
8805 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8806 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8807 value, split16a_type);
8808 }
8809 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8810 {
8811 value += addend;
8812 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8813 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8814 value, split16d_type);
8815 }
8816 }
8817 continue;
8818
8819 /* Relocate against the beginning of the section. */
8820 case R_PPC_SECTOFF:
8821 case R_PPC_SECTOFF_LO:
8822 case R_PPC_SECTOFF_HI:
8823 case R_PPC_SECTOFF_HA:
8824 if (sec == NULL || sec->output_section == NULL)
8825 {
8826 unresolved_reloc = TRUE;
8827 break;
8828 }
8829 addend -= sec->output_section->vma;
8830 break;
8831
8832 /* Negative relocations. */
8833 case R_PPC_EMB_NADDR32:
8834 case R_PPC_EMB_NADDR16:
8835 case R_PPC_EMB_NADDR16_LO:
8836 case R_PPC_EMB_NADDR16_HI:
8837 case R_PPC_EMB_NADDR16_HA:
8838 addend -= 2 * relocation;
8839 break;
8840
8841 case R_PPC_COPY:
8842 case R_PPC_GLOB_DAT:
8843 case R_PPC_JMP_SLOT:
8844 case R_PPC_RELATIVE:
8845 case R_PPC_IRELATIVE:
8846 case R_PPC_PLT32:
8847 case R_PPC_PLTREL32:
8848 case R_PPC_PLT16_LO:
8849 case R_PPC_PLT16_HI:
8850 case R_PPC_PLT16_HA:
8851 case R_PPC_ADDR30:
8852 case R_PPC_EMB_RELSEC16:
8853 case R_PPC_EMB_RELST_LO:
8854 case R_PPC_EMB_RELST_HI:
8855 case R_PPC_EMB_RELST_HA:
8856 case R_PPC_EMB_BIT_FLD:
8857 info->callbacks->einfo
8858 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
8859 input_bfd,
8860 howto->name,
8861 sym_name);
8862
8863 bfd_set_error (bfd_error_invalid_operation);
8864 ret = FALSE;
8865 continue;
8866 }
8867
8868 /* Do any further special processing. */
8869 switch (r_type)
8870 {
8871 default:
8872 break;
8873
8874 case R_PPC_ADDR16_HA:
8875 case R_PPC_REL16_HA:
8876 case R_PPC_SECTOFF_HA:
8877 case R_PPC_TPREL16_HA:
8878 case R_PPC_DTPREL16_HA:
8879 case R_PPC_EMB_NADDR16_HA:
8880 case R_PPC_EMB_RELST_HA:
8881 /* It's just possible that this symbol is a weak symbol
8882 that's not actually defined anywhere. In that case,
8883 'sec' would be NULL, and we should leave the symbol
8884 alone (it will be set to zero elsewhere in the link). */
8885 if (sec == NULL)
8886 break;
8887 /* Fall thru */
8888
8889 case R_PPC_PLT16_HA:
8890 case R_PPC_GOT16_HA:
8891 case R_PPC_GOT_TLSGD16_HA:
8892 case R_PPC_GOT_TLSLD16_HA:
8893 case R_PPC_GOT_TPREL16_HA:
8894 case R_PPC_GOT_DTPREL16_HA:
8895 /* Add 0x10000 if sign bit in 0:15 is set.
8896 Bits 0:15 are not used. */
8897 addend += 0x8000;
8898 break;
8899
8900 case R_PPC_ADDR16:
8901 case R_PPC_ADDR16_LO:
8902 case R_PPC_GOT16:
8903 case R_PPC_GOT16_LO:
8904 case R_PPC_SDAREL16:
8905 case R_PPC_SECTOFF:
8906 case R_PPC_SECTOFF_LO:
8907 case R_PPC_DTPREL16:
8908 case R_PPC_DTPREL16_LO:
8909 case R_PPC_TPREL16:
8910 case R_PPC_TPREL16_LO:
8911 case R_PPC_GOT_TLSGD16:
8912 case R_PPC_GOT_TLSGD16_LO:
8913 case R_PPC_GOT_TLSLD16:
8914 case R_PPC_GOT_TLSLD16_LO:
8915 case R_PPC_GOT_DTPREL16:
8916 case R_PPC_GOT_DTPREL16_LO:
8917 case R_PPC_GOT_TPREL16:
8918 case R_PPC_GOT_TPREL16_LO:
8919 {
8920 /* The 32-bit ABI lacks proper relocations to deal with
8921 certain 64-bit instructions. Prevent damage to bits
8922 that make up part of the insn opcode. */
8923 unsigned int insn, mask, lobit;
8924
8925 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
8926 mask = 0;
8927 if (is_insn_ds_form (insn))
8928 mask = 3;
8929 else if (is_insn_dq_form (insn))
8930 mask = 15;
8931 else
8932 break;
8933 lobit = mask & (relocation + addend);
8934 if (lobit != 0)
8935 {
8936 addend -= lobit;
8937 info->callbacks->einfo
8938 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
8939 input_bfd, input_section, rel->r_offset,
8940 howto->name, sym_name, mask + 1);
8941 bfd_set_error (bfd_error_bad_value);
8942 ret = FALSE;
8943 }
8944 addend += insn & mask;
8945 }
8946 break;
8947 }
8948
8949 #ifdef DEBUG
8950 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8951 "offset = %ld, addend = %ld\n",
8952 howto->name,
8953 (int) r_type,
8954 sym_name,
8955 r_symndx,
8956 (long) rel->r_offset,
8957 (long) addend);
8958 #endif
8959
8960 if (unresolved_reloc
8961 && !((input_section->flags & SEC_DEBUGGING) != 0
8962 && h->def_dynamic)
8963 && _bfd_elf_section_offset (output_bfd, info, input_section,
8964 rel->r_offset) != (bfd_vma) -1)
8965 {
8966 info->callbacks->einfo
8967 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
8968 input_bfd, input_section, rel->r_offset,
8969 howto->name,
8970 sym_name);
8971 ret = FALSE;
8972 }
8973
8974 r = _bfd_final_link_relocate (howto,
8975 input_bfd,
8976 input_section,
8977 contents,
8978 rel->r_offset,
8979 relocation,
8980 addend);
8981
8982 if (r != bfd_reloc_ok)
8983 {
8984 if (r == bfd_reloc_overflow)
8985 {
8986 if (warned)
8987 continue;
8988 if (h != NULL
8989 && h->root.type == bfd_link_hash_undefweak
8990 && howto->pc_relative)
8991 {
8992 /* Assume this is a call protected by other code that
8993 detect the symbol is undefined. If this is the case,
8994 we can safely ignore the overflow. If not, the
8995 program is hosed anyway, and a little warning isn't
8996 going to help. */
8997
8998 continue;
8999 }
9000
9001 if (! (*info->callbacks->reloc_overflow) (info,
9002 (h ? &h->root : NULL),
9003 sym_name,
9004 howto->name,
9005 rel->r_addend,
9006 input_bfd,
9007 input_section,
9008 rel->r_offset))
9009 return FALSE;
9010 }
9011 else
9012 {
9013 info->callbacks->einfo
9014 (_("%P: %H: %s reloc against `%s': error %d\n"),
9015 input_bfd, input_section, rel->r_offset,
9016 howto->name, sym_name, (int) r);
9017 ret = FALSE;
9018 }
9019 }
9020 }
9021
9022 #ifdef DEBUG
9023 fprintf (stderr, "\n");
9024 #endif
9025
9026 return ret;
9027 }
9028 \f
9029 /* Finish up dynamic symbol handling. We set the contents of various
9030 dynamic sections here. */
9031
9032 static bfd_boolean
9033 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9034 struct bfd_link_info *info,
9035 struct elf_link_hash_entry *h,
9036 Elf_Internal_Sym *sym)
9037 {
9038 struct ppc_elf_link_hash_table *htab;
9039 struct plt_entry *ent;
9040 bfd_boolean doneone;
9041
9042 #ifdef DEBUG
9043 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9044 h->root.root.string);
9045 #endif
9046
9047 htab = ppc_elf_hash_table (info);
9048 BFD_ASSERT (htab->elf.dynobj != NULL);
9049
9050 doneone = FALSE;
9051 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9052 if (ent->plt.offset != (bfd_vma) -1)
9053 {
9054 if (!doneone)
9055 {
9056 Elf_Internal_Rela rela;
9057 bfd_byte *loc;
9058 bfd_vma reloc_index;
9059
9060 if (htab->plt_type == PLT_NEW
9061 || !htab->elf.dynamic_sections_created
9062 || h->dynindx == -1)
9063 reloc_index = ent->plt.offset / 4;
9064 else
9065 {
9066 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9067 / htab->plt_slot_size);
9068 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9069 && htab->plt_type == PLT_OLD)
9070 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9071 }
9072
9073 /* This symbol has an entry in the procedure linkage table.
9074 Set it up. */
9075 if (htab->plt_type == PLT_VXWORKS
9076 && htab->elf.dynamic_sections_created
9077 && h->dynindx != -1)
9078 {
9079 bfd_vma got_offset;
9080 const bfd_vma *plt_entry;
9081
9082 /* The first three entries in .got.plt are reserved. */
9083 got_offset = (reloc_index + 3) * 4;
9084
9085 /* Use the right PLT. */
9086 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9087 : ppc_elf_vxworks_plt_entry;
9088
9089 /* Fill in the .plt on VxWorks. */
9090 if (info->shared)
9091 {
9092 bfd_put_32 (output_bfd,
9093 plt_entry[0] | PPC_HA (got_offset),
9094 htab->plt->contents + ent->plt.offset + 0);
9095 bfd_put_32 (output_bfd,
9096 plt_entry[1] | PPC_LO (got_offset),
9097 htab->plt->contents + ent->plt.offset + 4);
9098 }
9099 else
9100 {
9101 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9102
9103 bfd_put_32 (output_bfd,
9104 plt_entry[0] | PPC_HA (got_loc),
9105 htab->plt->contents + ent->plt.offset + 0);
9106 bfd_put_32 (output_bfd,
9107 plt_entry[1] | PPC_LO (got_loc),
9108 htab->plt->contents + ent->plt.offset + 4);
9109 }
9110
9111 bfd_put_32 (output_bfd, plt_entry[2],
9112 htab->plt->contents + ent->plt.offset + 8);
9113 bfd_put_32 (output_bfd, plt_entry[3],
9114 htab->plt->contents + ent->plt.offset + 12);
9115
9116 /* This instruction is an immediate load. The value loaded is
9117 the byte offset of the R_PPC_JMP_SLOT relocation from the
9118 start of the .rela.plt section. The value is stored in the
9119 low-order 16 bits of the load instruction. */
9120 /* NOTE: It appears that this is now an index rather than a
9121 prescaled offset. */
9122 bfd_put_32 (output_bfd,
9123 plt_entry[4] | reloc_index,
9124 htab->plt->contents + ent->plt.offset + 16);
9125 /* This instruction is a PC-relative branch whose target is
9126 the start of the PLT section. The address of this branch
9127 instruction is 20 bytes beyond the start of this PLT entry.
9128 The address is encoded in bits 6-29, inclusive. The value
9129 stored is right-shifted by two bits, permitting a 26-bit
9130 offset. */
9131 bfd_put_32 (output_bfd,
9132 (plt_entry[5]
9133 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9134 htab->plt->contents + ent->plt.offset + 20);
9135 bfd_put_32 (output_bfd, plt_entry[6],
9136 htab->plt->contents + ent->plt.offset + 24);
9137 bfd_put_32 (output_bfd, plt_entry[7],
9138 htab->plt->contents + ent->plt.offset + 28);
9139
9140 /* Fill in the GOT entry corresponding to this PLT slot with
9141 the address immediately after the "bctr" instruction
9142 in this PLT entry. */
9143 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9144 + htab->plt->output_offset
9145 + ent->plt.offset + 16),
9146 htab->sgotplt->contents + got_offset);
9147
9148 if (!info->shared)
9149 {
9150 /* Fill in a couple of entries in .rela.plt.unloaded. */
9151 loc = htab->srelplt2->contents
9152 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9153 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9154 * sizeof (Elf32_External_Rela));
9155
9156 /* Provide the @ha relocation for the first instruction. */
9157 rela.r_offset = (htab->plt->output_section->vma
9158 + htab->plt->output_offset
9159 + ent->plt.offset + 2);
9160 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9161 R_PPC_ADDR16_HA);
9162 rela.r_addend = got_offset;
9163 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9164 loc += sizeof (Elf32_External_Rela);
9165
9166 /* Provide the @l relocation for the second instruction. */
9167 rela.r_offset = (htab->plt->output_section->vma
9168 + htab->plt->output_offset
9169 + ent->plt.offset + 6);
9170 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9171 R_PPC_ADDR16_LO);
9172 rela.r_addend = got_offset;
9173 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9174 loc += sizeof (Elf32_External_Rela);
9175
9176 /* Provide a relocation for the GOT entry corresponding to this
9177 PLT slot. Point it at the middle of the .plt entry. */
9178 rela.r_offset = (htab->sgotplt->output_section->vma
9179 + htab->sgotplt->output_offset
9180 + got_offset);
9181 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9182 R_PPC_ADDR32);
9183 rela.r_addend = ent->plt.offset + 16;
9184 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9185 }
9186
9187 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9188 In particular, the offset for the relocation is not the
9189 address of the PLT entry for this function, as specified
9190 by the ABI. Instead, the offset is set to the address of
9191 the GOT slot for this function. See EABI 4.4.4.1. */
9192 rela.r_offset = (htab->sgotplt->output_section->vma
9193 + htab->sgotplt->output_offset
9194 + got_offset);
9195
9196 }
9197 else
9198 {
9199 asection *splt = htab->plt;
9200 if (!htab->elf.dynamic_sections_created
9201 || h->dynindx == -1)
9202 splt = htab->iplt;
9203
9204 rela.r_offset = (splt->output_section->vma
9205 + splt->output_offset
9206 + ent->plt.offset);
9207 if (htab->plt_type == PLT_OLD
9208 || !htab->elf.dynamic_sections_created
9209 || h->dynindx == -1)
9210 {
9211 /* We don't need to fill in the .plt. The ppc dynamic
9212 linker will fill it in. */
9213 }
9214 else
9215 {
9216 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9217 + htab->glink->output_section->vma
9218 + htab->glink->output_offset);
9219 bfd_put_32 (output_bfd, val,
9220 splt->contents + ent->plt.offset);
9221 }
9222 }
9223
9224 /* Fill in the entry in the .rela.plt section. */
9225 rela.r_addend = 0;
9226 if (!htab->elf.dynamic_sections_created
9227 || h->dynindx == -1)
9228 {
9229 BFD_ASSERT (h->type == STT_GNU_IFUNC
9230 && h->def_regular
9231 && (h->root.type == bfd_link_hash_defined
9232 || h->root.type == bfd_link_hash_defweak));
9233 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9234 rela.r_addend = SYM_VAL (h);
9235 }
9236 else
9237 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9238
9239 if (!htab->elf.dynamic_sections_created
9240 || h->dynindx == -1)
9241 loc = (htab->reliplt->contents
9242 + (htab->reliplt->reloc_count++
9243 * sizeof (Elf32_External_Rela)));
9244 else
9245 loc = (htab->relplt->contents
9246 + reloc_index * sizeof (Elf32_External_Rela));
9247 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9248
9249 if (!h->def_regular)
9250 {
9251 /* Mark the symbol as undefined, rather than as
9252 defined in the .plt section. Leave the value if
9253 there were any relocations where pointer equality
9254 matters (this is a clue for the dynamic linker, to
9255 make function pointer comparisons work between an
9256 application and shared library), otherwise set it
9257 to zero. */
9258 sym->st_shndx = SHN_UNDEF;
9259 if (!h->pointer_equality_needed)
9260 sym->st_value = 0;
9261 else if (!h->ref_regular_nonweak)
9262 {
9263 /* This breaks function pointer comparisons, but
9264 that is better than breaking tests for a NULL
9265 function pointer. */
9266 sym->st_value = 0;
9267 }
9268 }
9269 else if (h->type == STT_GNU_IFUNC
9270 && !info->shared)
9271 {
9272 /* Set the value of ifunc symbols in a non-pie
9273 executable to the glink entry. This is to avoid
9274 text relocations. We can't do this for ifunc in
9275 allocate_dynrelocs, as we do for normal dynamic
9276 function symbols with plt entries, because we need
9277 to keep the original value around for the ifunc
9278 relocation. */
9279 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9280 (output_bfd, htab->glink->output_section));
9281 sym->st_value = (ent->glink_offset
9282 + htab->glink->output_offset
9283 + htab->glink->output_section->vma);
9284 }
9285 doneone = TRUE;
9286 }
9287
9288 if (htab->plt_type == PLT_NEW
9289 || !htab->elf.dynamic_sections_created
9290 || h->dynindx == -1)
9291 {
9292 unsigned char *p;
9293 asection *splt = htab->plt;
9294 if (!htab->elf.dynamic_sections_created
9295 || h->dynindx == -1)
9296 splt = htab->iplt;
9297
9298 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9299
9300 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
9301 {
9302 bfd_put_32 (output_bfd, LWZ_11_3, p);
9303 p += 4;
9304 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9305 p += 4;
9306 bfd_put_32 (output_bfd, MR_0_3, p);
9307 p += 4;
9308 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9309 p += 4;
9310 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9311 p += 4;
9312 bfd_put_32 (output_bfd, BEQLR, p);
9313 p += 4;
9314 bfd_put_32 (output_bfd, MR_3_0, p);
9315 p += 4;
9316 bfd_put_32 (output_bfd, NOP, p);
9317 p += 4;
9318 }
9319
9320 write_glink_stub (ent, splt, p, info);
9321
9322 if (!info->shared)
9323 /* We only need one non-PIC glink stub. */
9324 break;
9325 }
9326 else
9327 break;
9328 }
9329
9330 if (h->needs_copy)
9331 {
9332 asection *s;
9333 Elf_Internal_Rela rela;
9334 bfd_byte *loc;
9335
9336 /* This symbols needs a copy reloc. Set it up. */
9337
9338 #ifdef DEBUG
9339 fprintf (stderr, ", copy");
9340 #endif
9341
9342 BFD_ASSERT (h->dynindx != -1);
9343
9344 if (ppc_elf_hash_entry (h)->has_sda_refs)
9345 s = htab->relsbss;
9346 else
9347 s = htab->relbss;
9348 BFD_ASSERT (s != NULL);
9349
9350 rela.r_offset = SYM_VAL (h);
9351 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9352 rela.r_addend = 0;
9353 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9354 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9355 }
9356
9357 #ifdef DEBUG
9358 fprintf (stderr, "\n");
9359 #endif
9360
9361 return TRUE;
9362 }
9363 \f
9364 static enum elf_reloc_type_class
9365 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9366 const asection *rel_sec,
9367 const Elf_Internal_Rela *rela)
9368 {
9369 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9370
9371 if (rel_sec == htab->reliplt)
9372 return reloc_class_ifunc;
9373
9374 switch (ELF32_R_TYPE (rela->r_info))
9375 {
9376 case R_PPC_RELATIVE:
9377 return reloc_class_relative;
9378 case R_PPC_JMP_SLOT:
9379 return reloc_class_plt;
9380 case R_PPC_COPY:
9381 return reloc_class_copy;
9382 default:
9383 return reloc_class_normal;
9384 }
9385 }
9386 \f
9387 /* Finish up the dynamic sections. */
9388
9389 static bfd_boolean
9390 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9391 struct bfd_link_info *info)
9392 {
9393 asection *sdyn;
9394 asection *splt;
9395 struct ppc_elf_link_hash_table *htab;
9396 bfd_vma got;
9397 bfd *dynobj;
9398 bfd_boolean ret = TRUE;
9399
9400 #ifdef DEBUG
9401 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9402 #endif
9403
9404 htab = ppc_elf_hash_table (info);
9405 dynobj = elf_hash_table (info)->dynobj;
9406 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9407 if (htab->is_vxworks)
9408 splt = bfd_get_linker_section (dynobj, ".plt");
9409 else
9410 splt = NULL;
9411
9412 got = 0;
9413 if (htab->elf.hgot != NULL)
9414 got = SYM_VAL (htab->elf.hgot);
9415
9416 if (htab->elf.dynamic_sections_created)
9417 {
9418 Elf32_External_Dyn *dyncon, *dynconend;
9419
9420 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9421
9422 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9423 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9424 for (; dyncon < dynconend; dyncon++)
9425 {
9426 Elf_Internal_Dyn dyn;
9427 asection *s;
9428
9429 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9430
9431 switch (dyn.d_tag)
9432 {
9433 case DT_PLTGOT:
9434 if (htab->is_vxworks)
9435 s = htab->sgotplt;
9436 else
9437 s = htab->plt;
9438 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9439 break;
9440
9441 case DT_PLTRELSZ:
9442 dyn.d_un.d_val = htab->relplt->size;
9443 break;
9444
9445 case DT_JMPREL:
9446 s = htab->relplt;
9447 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9448 break;
9449
9450 case DT_PPC_GOT:
9451 dyn.d_un.d_ptr = got;
9452 break;
9453
9454 case DT_RELASZ:
9455 if (htab->is_vxworks)
9456 {
9457 if (htab->relplt)
9458 dyn.d_un.d_ptr -= htab->relplt->size;
9459 break;
9460 }
9461 continue;
9462
9463 default:
9464 if (htab->is_vxworks
9465 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9466 break;
9467 continue;
9468 }
9469
9470 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9471 }
9472 }
9473
9474 if (htab->got != NULL)
9475 {
9476 if (htab->elf.hgot->root.u.def.section == htab->got
9477 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9478 {
9479 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9480
9481 p += htab->elf.hgot->root.u.def.value;
9482 if (htab->plt_type == PLT_OLD)
9483 {
9484 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9485 so that a function can easily find the address of
9486 _GLOBAL_OFFSET_TABLE_. */
9487 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9488 < htab->elf.hgot->root.u.def.section->size);
9489 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9490 }
9491
9492 if (sdyn != NULL)
9493 {
9494 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9495 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9496 < htab->elf.hgot->root.u.def.section->size);
9497 bfd_put_32 (output_bfd, val, p);
9498 }
9499 }
9500 else
9501 {
9502 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9503 htab->elf.hgot->root.root.string,
9504 (htab->sgotplt != NULL
9505 ? htab->sgotplt->name : htab->got->name));
9506 bfd_set_error (bfd_error_bad_value);
9507 ret = FALSE;
9508 }
9509
9510 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9511 }
9512
9513 /* Fill in the first entry in the VxWorks procedure linkage table. */
9514 if (splt && splt->size > 0)
9515 {
9516 /* Use the right PLT. */
9517 const bfd_vma *plt_entry = (info->shared
9518 ? ppc_elf_vxworks_pic_plt0_entry
9519 : ppc_elf_vxworks_plt0_entry);
9520
9521 if (!info->shared)
9522 {
9523 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9524
9525 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9526 splt->contents + 0);
9527 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9528 splt->contents + 4);
9529 }
9530 else
9531 {
9532 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9533 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9534 }
9535 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9536 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9537 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9538 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9539 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9540 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9541
9542 if (! info->shared)
9543 {
9544 Elf_Internal_Rela rela;
9545 bfd_byte *loc;
9546
9547 loc = htab->srelplt2->contents;
9548
9549 /* Output the @ha relocation for the first instruction. */
9550 rela.r_offset = (htab->plt->output_section->vma
9551 + htab->plt->output_offset
9552 + 2);
9553 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9554 rela.r_addend = 0;
9555 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9556 loc += sizeof (Elf32_External_Rela);
9557
9558 /* Output the @l relocation for the second instruction. */
9559 rela.r_offset = (htab->plt->output_section->vma
9560 + htab->plt->output_offset
9561 + 6);
9562 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9563 rela.r_addend = 0;
9564 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9565 loc += sizeof (Elf32_External_Rela);
9566
9567 /* Fix up the remaining relocations. They may have the wrong
9568 symbol index for _G_O_T_ or _P_L_T_ depending on the order
9569 in which symbols were output. */
9570 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
9571 {
9572 Elf_Internal_Rela rel;
9573
9574 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9575 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9576 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9577 loc += sizeof (Elf32_External_Rela);
9578
9579 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9580 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9581 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9582 loc += sizeof (Elf32_External_Rela);
9583
9584 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9585 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
9586 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9587 loc += sizeof (Elf32_External_Rela);
9588 }
9589 }
9590 }
9591
9592 if (htab->glink != NULL
9593 && htab->glink->contents != NULL
9594 && htab->elf.dynamic_sections_created)
9595 {
9596 unsigned char *p;
9597 unsigned char *endp;
9598 bfd_vma res0;
9599 unsigned int i;
9600
9601 /*
9602 * PIC glink code is the following:
9603 *
9604 * # ith PLT code stub.
9605 * addis 11,30,(plt+(i-1)*4-got)@ha
9606 * lwz 11,(plt+(i-1)*4-got)@l(11)
9607 * mtctr 11
9608 * bctr
9609 *
9610 * # A table of branches, one for each plt entry.
9611 * # The idea is that the plt call stub loads ctr and r11 with these
9612 * # addresses, so (r11 - res_0) gives the plt index * 4.
9613 * res_0: b PLTresolve
9614 * res_1: b PLTresolve
9615 * .
9616 * # Some number of entries towards the end can be nops
9617 * res_n_m3: nop
9618 * res_n_m2: nop
9619 * res_n_m1:
9620 *
9621 * PLTresolve:
9622 * addis 11,11,(1f-res_0)@ha
9623 * mflr 0
9624 * bcl 20,31,1f
9625 * 1: addi 11,11,(1b-res_0)@l
9626 * mflr 12
9627 * mtlr 0
9628 * sub 11,11,12 # r11 = index * 4
9629 * addis 12,12,(got+4-1b)@ha
9630 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
9631 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
9632 * mtctr 0
9633 * add 0,11,11
9634 * add 11,0,11 # r11 = index * 12 = reloc offset.
9635 * bctr
9636 */
9637 static const unsigned int pic_plt_resolve[] =
9638 {
9639 ADDIS_11_11,
9640 MFLR_0,
9641 BCL_20_31,
9642 ADDI_11_11,
9643 MFLR_12,
9644 MTLR_0,
9645 SUB_11_11_12,
9646 ADDIS_12_12,
9647 LWZ_0_12,
9648 LWZ_12_12,
9649 MTCTR_0,
9650 ADD_0_11_11,
9651 ADD_11_0_11,
9652 BCTR,
9653 NOP,
9654 NOP
9655 };
9656
9657 /*
9658 * Non-PIC glink code is a little simpler.
9659 *
9660 * # ith PLT code stub.
9661 * lis 11,(plt+(i-1)*4)@ha
9662 * lwz 11,(plt+(i-1)*4)@l(11)
9663 * mtctr 11
9664 * bctr
9665 *
9666 * The branch table is the same, then comes
9667 *
9668 * PLTresolve:
9669 * lis 12,(got+4)@ha
9670 * addis 11,11,(-res_0)@ha
9671 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
9672 * addi 11,11,(-res_0)@l # r11 = index * 4
9673 * mtctr 0
9674 * add 0,11,11
9675 * lwz 12,(got+8)@l(12) # got[2] contains the map address
9676 * add 11,0,11 # r11 = index * 12 = reloc offset.
9677 * bctr
9678 */
9679 static const unsigned int plt_resolve[] =
9680 {
9681 LIS_12,
9682 ADDIS_11_11,
9683 LWZ_0_12,
9684 ADDI_11_11,
9685 MTCTR_0,
9686 ADD_0_11_11,
9687 LWZ_12_12,
9688 ADD_11_0_11,
9689 BCTR,
9690 NOP,
9691 NOP,
9692 NOP,
9693 NOP,
9694 NOP,
9695 NOP,
9696 NOP
9697 };
9698
9699 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
9700 abort ();
9701 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
9702 abort ();
9703
9704 /* Build the branch table, one for each plt entry (less one),
9705 and perhaps some padding. */
9706 p = htab->glink->contents;
9707 p += htab->glink_pltresolve;
9708 endp = htab->glink->contents;
9709 endp += htab->glink->size - GLINK_PLTRESOLVE;
9710 while (p < endp - 8 * 4)
9711 {
9712 bfd_put_32 (output_bfd, B + endp - p, p);
9713 p += 4;
9714 }
9715 while (p < endp)
9716 {
9717 bfd_put_32 (output_bfd, NOP, p);
9718 p += 4;
9719 }
9720
9721 res0 = (htab->glink_pltresolve
9722 + htab->glink->output_section->vma
9723 + htab->glink->output_offset);
9724
9725 /* Last comes the PLTresolve stub. */
9726 if (info->shared)
9727 {
9728 bfd_vma bcl;
9729
9730 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
9731 {
9732 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
9733 p += 4;
9734 }
9735 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
9736
9737 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
9738 + htab->glink->output_section->vma
9739 + htab->glink->output_offset);
9740
9741 bfd_put_32 (output_bfd,
9742 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
9743 bfd_put_32 (output_bfd,
9744 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
9745 bfd_put_32 (output_bfd,
9746 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
9747 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
9748 {
9749 bfd_put_32 (output_bfd,
9750 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
9751 bfd_put_32 (output_bfd,
9752 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
9753 }
9754 else
9755 {
9756 bfd_put_32 (output_bfd,
9757 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
9758 bfd_put_32 (output_bfd,
9759 LWZ_12_12 + 4, p + 9*4);
9760 }
9761 }
9762 else
9763 {
9764 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
9765 {
9766 bfd_put_32 (output_bfd, plt_resolve[i], p);
9767 p += 4;
9768 }
9769 p -= 4 * ARRAY_SIZE (plt_resolve);
9770
9771 bfd_put_32 (output_bfd,
9772 LIS_12 + PPC_HA (got + 4), p + 0*4);
9773 bfd_put_32 (output_bfd,
9774 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
9775 bfd_put_32 (output_bfd,
9776 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
9777 if (PPC_HA (got + 4) == PPC_HA (got + 8))
9778 {
9779 bfd_put_32 (output_bfd,
9780 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
9781 bfd_put_32 (output_bfd,
9782 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
9783 }
9784 else
9785 {
9786 bfd_put_32 (output_bfd,
9787 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
9788 bfd_put_32 (output_bfd,
9789 LWZ_12_12 + 4, p + 6*4);
9790 }
9791 }
9792 }
9793
9794 if (htab->glink_eh_frame != NULL
9795 && htab->glink_eh_frame->contents != NULL)
9796 {
9797 unsigned char *p = htab->glink_eh_frame->contents;
9798 bfd_vma val;
9799
9800 p += sizeof (glink_eh_frame_cie);
9801 /* FDE length. */
9802 p += 4;
9803 /* CIE pointer. */
9804 p += 4;
9805 /* Offset to .glink. */
9806 val = (htab->glink->output_section->vma
9807 + htab->glink->output_offset);
9808 val -= (htab->glink_eh_frame->output_section->vma
9809 + htab->glink_eh_frame->output_offset);
9810 val -= p - htab->glink_eh_frame->contents;
9811 bfd_put_32 (htab->elf.dynobj, val, p);
9812
9813 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
9814 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
9815 htab->glink_eh_frame,
9816 htab->glink_eh_frame->contents))
9817 return FALSE;
9818 }
9819
9820 return ret;
9821 }
9822 \f
9823 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
9824 #define TARGET_LITTLE_NAME "elf32-powerpcle"
9825 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
9826 #define TARGET_BIG_NAME "elf32-powerpc"
9827 #define ELF_ARCH bfd_arch_powerpc
9828 #define ELF_TARGET_ID PPC32_ELF_DATA
9829 #define ELF_MACHINE_CODE EM_PPC
9830 #ifdef __QNXTARGET__
9831 #define ELF_MAXPAGESIZE 0x1000
9832 #else
9833 #define ELF_MAXPAGESIZE 0x10000
9834 #endif
9835 #define ELF_MINPAGESIZE 0x1000
9836 #define ELF_COMMONPAGESIZE 0x1000
9837 #define elf_info_to_howto ppc_elf_info_to_howto
9838
9839 #ifdef EM_CYGNUS_POWERPC
9840 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
9841 #endif
9842
9843 #ifdef EM_PPC_OLD
9844 #define ELF_MACHINE_ALT2 EM_PPC_OLD
9845 #endif
9846
9847 #define elf_backend_plt_not_loaded 1
9848 #define elf_backend_can_gc_sections 1
9849 #define elf_backend_can_refcount 1
9850 #define elf_backend_rela_normal 1
9851
9852 #define bfd_elf32_mkobject ppc_elf_mkobject
9853 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
9854 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
9855 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
9856 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
9857 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
9858 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
9859 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
9860
9861 #define elf_backend_object_p ppc_elf_object_p
9862 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
9863 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
9864 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
9865 #define elf_backend_relocate_section ppc_elf_relocate_section
9866 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
9867 #define elf_backend_check_relocs ppc_elf_check_relocs
9868 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
9869 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
9870 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
9871 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
9872 #define elf_backend_hash_symbol ppc_elf_hash_symbol
9873 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
9874 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
9875 #define elf_backend_fake_sections ppc_elf_fake_sections
9876 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
9877 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
9878 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
9879 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
9880 #define elf_backend_write_core_note ppc_elf_write_core_note
9881 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
9882 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
9883 #define elf_backend_final_write_processing ppc_elf_final_write_processing
9884 #define elf_backend_write_section ppc_elf_write_section
9885 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
9886 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
9887 #define elf_backend_action_discarded ppc_elf_action_discarded
9888 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
9889 #define elf_backend_post_process_headers _bfd_elf_set_osabi
9890 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
9891 #define elf_backend_section_processing ppc_elf_section_processing
9892
9893 #include "elf32-target.h"
9894
9895 /* FreeBSD Target */
9896
9897 #undef TARGET_LITTLE_SYM
9898 #undef TARGET_LITTLE_NAME
9899
9900 #undef TARGET_BIG_SYM
9901 #define TARGET_BIG_SYM bfd_elf32_powerpc_freebsd_vec
9902 #undef TARGET_BIG_NAME
9903 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
9904
9905 #undef ELF_OSABI
9906 #define ELF_OSABI ELFOSABI_FREEBSD
9907
9908 #undef elf32_bed
9909 #define elf32_bed elf32_powerpc_fbsd_bed
9910
9911 #include "elf32-target.h"
9912
9913 /* VxWorks Target */
9914
9915 #undef TARGET_LITTLE_SYM
9916 #undef TARGET_LITTLE_NAME
9917
9918 #undef TARGET_BIG_SYM
9919 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
9920 #undef TARGET_BIG_NAME
9921 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
9922
9923 #undef ELF_OSABI
9924
9925 /* VxWorks uses the elf default section flags for .plt. */
9926 static const struct bfd_elf_special_section *
9927 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9928 {
9929 if (sec->name == NULL)
9930 return NULL;
9931
9932 if (strcmp (sec->name, ".plt") == 0)
9933 return _bfd_elf_get_sec_type_attr (abfd, sec);
9934
9935 return ppc_elf_get_sec_type_attr (abfd, sec);
9936 }
9937
9938 /* Like ppc_elf_link_hash_table_create, but overrides
9939 appropriately for VxWorks. */
9940 static struct bfd_link_hash_table *
9941 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9942 {
9943 struct bfd_link_hash_table *ret;
9944
9945 ret = ppc_elf_link_hash_table_create (abfd);
9946 if (ret)
9947 {
9948 struct ppc_elf_link_hash_table *htab
9949 = (struct ppc_elf_link_hash_table *)ret;
9950 htab->is_vxworks = 1;
9951 htab->plt_type = PLT_VXWORKS;
9952 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
9953 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
9954 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
9955 }
9956 return ret;
9957 }
9958
9959 /* Tweak magic VxWorks symbols as they are loaded. */
9960 static bfd_boolean
9961 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
9962 struct bfd_link_info *info,
9963 Elf_Internal_Sym *sym,
9964 const char **namep ATTRIBUTE_UNUSED,
9965 flagword *flagsp ATTRIBUTE_UNUSED,
9966 asection **secp,
9967 bfd_vma *valp)
9968 {
9969 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
9970 valp))
9971 return FALSE;
9972
9973 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
9974 }
9975
9976 static void
9977 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
9978 {
9979 ppc_elf_final_write_processing(abfd, linker);
9980 elf_vxworks_final_write_processing(abfd, linker);
9981 }
9982
9983 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
9984 define it. */
9985 #undef elf_backend_want_plt_sym
9986 #define elf_backend_want_plt_sym 1
9987 #undef elf_backend_want_got_plt
9988 #define elf_backend_want_got_plt 1
9989 #undef elf_backend_got_symbol_offset
9990 #define elf_backend_got_symbol_offset 0
9991 #undef elf_backend_plt_not_loaded
9992 #define elf_backend_plt_not_loaded 0
9993 #undef elf_backend_plt_readonly
9994 #define elf_backend_plt_readonly 1
9995 #undef elf_backend_got_header_size
9996 #define elf_backend_got_header_size 12
9997
9998 #undef bfd_elf32_get_synthetic_symtab
9999
10000 #undef bfd_elf32_bfd_link_hash_table_create
10001 #define bfd_elf32_bfd_link_hash_table_create \
10002 ppc_elf_vxworks_link_hash_table_create
10003 #undef elf_backend_add_symbol_hook
10004 #define elf_backend_add_symbol_hook \
10005 ppc_elf_vxworks_add_symbol_hook
10006 #undef elf_backend_link_output_symbol_hook
10007 #define elf_backend_link_output_symbol_hook \
10008 elf_vxworks_link_output_symbol_hook
10009 #undef elf_backend_final_write_processing
10010 #define elf_backend_final_write_processing \
10011 ppc_elf_vxworks_final_write_processing
10012 #undef elf_backend_get_sec_type_attr
10013 #define elf_backend_get_sec_type_attr \
10014 ppc_elf_vxworks_get_sec_type_attr
10015 #undef elf_backend_emit_relocs
10016 #define elf_backend_emit_relocs \
10017 elf_vxworks_emit_relocs
10018
10019 #undef elf32_bed
10020 #define elf32_bed ppc_elf_vxworks_bed
10021 #undef elf_backend_post_process_headers
10022
10023 #include "elf32-target.h"
GDB Binutils - Deliverables
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