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c1b53146a37c8b9178607886b468274ad6f6f9b0
[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 /* Used to track dynamic relocations for local symbols. */
3087 struct ppc_dyn_relocs
3088 {
3089 struct ppc_dyn_relocs *next;
3090
3091 /* The input section of the reloc. */
3092 asection *sec;
3093
3094 /* Total number of relocs copied for the input section. */
3095 unsigned int count : 31;
3096
3097 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3098 unsigned int ifunc : 1;
3099 };
3100
3101 /* PPC ELF linker hash entry. */
3102
3103 struct ppc_elf_link_hash_entry
3104 {
3105 struct elf_link_hash_entry elf;
3106
3107 /* If this symbol is used in the linker created sections, the processor
3108 specific backend uses this field to map the field into the offset
3109 from the beginning of the section. */
3110 elf_linker_section_pointers_t *linker_section_pointer;
3111
3112 /* Track dynamic relocs copied for this symbol. */
3113 struct elf_dyn_relocs *dyn_relocs;
3114
3115 /* Contexts in which symbol is used in the GOT (or TOC).
3116 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3117 corresponding relocs are encountered during check_relocs.
3118 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3119 indicate the corresponding GOT entry type is not needed. */
3120 #define TLS_GD 1 /* GD reloc. */
3121 #define TLS_LD 2 /* LD reloc. */
3122 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3123 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3124 #define TLS_TLS 16 /* Any TLS reloc. */
3125 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3126 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3127 char tls_mask;
3128
3129 /* Nonzero if we have seen a small data relocation referring to this
3130 symbol. */
3131 unsigned char has_sda_refs;
3132 };
3133
3134 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3135
3136 /* PPC ELF linker hash table. */
3137
3138 struct ppc_elf_link_hash_table
3139 {
3140 struct elf_link_hash_table elf;
3141
3142 /* Short-cuts to get to dynamic linker sections. */
3143 asection *got;
3144 asection *relgot;
3145 asection *glink;
3146 asection *plt;
3147 asection *relplt;
3148 asection *iplt;
3149 asection *reliplt;
3150 asection *dynbss;
3151 asection *relbss;
3152 asection *dynsbss;
3153 asection *relsbss;
3154 elf_linker_section_t sdata[2];
3155 asection *sbss;
3156 asection *glink_eh_frame;
3157
3158 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3159 asection *srelplt2;
3160
3161 /* The .got.plt section (VxWorks only)*/
3162 asection *sgotplt;
3163
3164 /* Shortcut to __tls_get_addr. */
3165 struct elf_link_hash_entry *tls_get_addr;
3166
3167 /* The bfd that forced an old-style PLT. */
3168 bfd *old_bfd;
3169
3170 /* TLS local dynamic got entry handling. */
3171 union {
3172 bfd_signed_vma refcount;
3173 bfd_vma offset;
3174 } tlsld_got;
3175
3176 /* Offset of branch table to PltResolve function in glink. */
3177 bfd_vma glink_pltresolve;
3178
3179 /* Size of reserved GOT entries. */
3180 unsigned int got_header_size;
3181 /* Non-zero if allocating the header left a gap. */
3182 unsigned int got_gap;
3183
3184 /* The type of PLT we have chosen to use. */
3185 enum ppc_elf_plt_type plt_type;
3186
3187 /* Set if we should emit symbols for stubs. */
3188 unsigned int emit_stub_syms:1;
3189
3190 /* Set if __tls_get_addr optimization should not be done. */
3191 unsigned int no_tls_get_addr_opt:1;
3192
3193 /* True if the target system is VxWorks. */
3194 unsigned int is_vxworks:1;
3195
3196 /* The size of PLT entries. */
3197 int plt_entry_size;
3198 /* The distance between adjacent PLT slots. */
3199 int plt_slot_size;
3200 /* The size of the first PLT entry. */
3201 int plt_initial_entry_size;
3202
3203 /* Small local sym cache. */
3204 struct sym_cache sym_cache;
3205 };
3206
3207 /* Rename some of the generic section flags to better document how they
3208 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3209
3210 /* Nonzero if this section has TLS related relocations. */
3211 #define has_tls_reloc sec_flg0
3212
3213 /* Nonzero if this section has a call to __tls_get_addr. */
3214 #define has_tls_get_addr_call sec_flg1
3215
3216 /* Get the PPC ELF linker hash table from a link_info structure. */
3217
3218 #define ppc_elf_hash_table(p) \
3219 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3220 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3221
3222 /* Create an entry in a PPC ELF linker hash table. */
3223
3224 static struct bfd_hash_entry *
3225 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3226 struct bfd_hash_table *table,
3227 const char *string)
3228 {
3229 /* Allocate the structure if it has not already been allocated by a
3230 subclass. */
3231 if (entry == NULL)
3232 {
3233 entry = bfd_hash_allocate (table,
3234 sizeof (struct ppc_elf_link_hash_entry));
3235 if (entry == NULL)
3236 return entry;
3237 }
3238
3239 /* Call the allocation method of the superclass. */
3240 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3241 if (entry != NULL)
3242 {
3243 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3244 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3245 ppc_elf_hash_entry (entry)->tls_mask = 0;
3246 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3247 }
3248
3249 return entry;
3250 }
3251
3252 /* Create a PPC ELF linker hash table. */
3253
3254 static struct bfd_link_hash_table *
3255 ppc_elf_link_hash_table_create (bfd *abfd)
3256 {
3257 struct ppc_elf_link_hash_table *ret;
3258
3259 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3260 if (ret == NULL)
3261 return NULL;
3262
3263 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3264 ppc_elf_link_hash_newfunc,
3265 sizeof (struct ppc_elf_link_hash_entry),
3266 PPC32_ELF_DATA))
3267 {
3268 free (ret);
3269 return NULL;
3270 }
3271
3272 ret->elf.init_plt_refcount.refcount = 0;
3273 ret->elf.init_plt_refcount.glist = NULL;
3274 ret->elf.init_plt_offset.offset = 0;
3275 ret->elf.init_plt_offset.glist = NULL;
3276
3277 ret->sdata[0].name = ".sdata";
3278 ret->sdata[0].sym_name = "_SDA_BASE_";
3279 ret->sdata[0].bss_name = ".sbss";
3280
3281 ret->sdata[1].name = ".sdata2";
3282 ret->sdata[1].sym_name = "_SDA2_BASE_";
3283 ret->sdata[1].bss_name = ".sbss2";
3284
3285 ret->plt_entry_size = 12;
3286 ret->plt_slot_size = 8;
3287 ret->plt_initial_entry_size = 72;
3288
3289 return &ret->elf.root;
3290 }
3291
3292 /* Create .got and the related sections. */
3293
3294 static bfd_boolean
3295 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3296 {
3297 struct ppc_elf_link_hash_table *htab;
3298 asection *s;
3299 flagword flags;
3300
3301 if (!_bfd_elf_create_got_section (abfd, info))
3302 return FALSE;
3303
3304 htab = ppc_elf_hash_table (info);
3305 htab->got = s = bfd_get_linker_section (abfd, ".got");
3306 if (s == NULL)
3307 abort ();
3308
3309 if (htab->is_vxworks)
3310 {
3311 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3312 if (!htab->sgotplt)
3313 abort ();
3314 }
3315 else
3316 {
3317 /* The powerpc .got has a blrl instruction in it. Mark it
3318 executable. */
3319 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3320 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3321 if (!bfd_set_section_flags (abfd, s, flags))
3322 return FALSE;
3323 }
3324
3325 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3326 if (!htab->relgot)
3327 abort ();
3328
3329 return TRUE;
3330 }
3331
3332 static bfd_boolean
3333 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3334 {
3335 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3336 asection *s;
3337 flagword flags;
3338
3339 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3340 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3341 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3342 htab->glink = s;
3343 if (s == NULL
3344 || !bfd_set_section_alignment (abfd, s, 4))
3345 return FALSE;
3346
3347 if (!info->no_ld_generated_unwind_info)
3348 {
3349 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3350 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3351 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3352 htab->glink_eh_frame = s;
3353 if (s == NULL
3354 || !bfd_set_section_alignment (abfd, s, 2))
3355 return FALSE;
3356 }
3357
3358 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3359 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3360 htab->iplt = s;
3361 if (s == NULL
3362 || !bfd_set_section_alignment (abfd, s, 4))
3363 return FALSE;
3364
3365 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3366 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3367 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3368 htab->reliplt = s;
3369 if (s == NULL
3370 || ! bfd_set_section_alignment (abfd, s, 2))
3371 return FALSE;
3372 return TRUE;
3373 }
3374
3375 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3376 to output sections (just like _bfd_elf_create_dynamic_sections has
3377 to create .dynbss and .rela.bss). */
3378
3379 static bfd_boolean
3380 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3381 {
3382 struct ppc_elf_link_hash_table *htab;
3383 asection *s;
3384 flagword flags;
3385
3386 htab = ppc_elf_hash_table (info);
3387
3388 if (htab->got == NULL
3389 && !ppc_elf_create_got (abfd, info))
3390 return FALSE;
3391
3392 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3393 return FALSE;
3394
3395 if (htab->glink == NULL
3396 && !ppc_elf_create_glink (abfd, info))
3397 return FALSE;
3398
3399 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3400 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3401 SEC_ALLOC | SEC_LINKER_CREATED);
3402 htab->dynsbss = s;
3403 if (s == NULL)
3404 return FALSE;
3405
3406 if (! info->shared)
3407 {
3408 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3409 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3410 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3411 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3412 htab->relsbss = s;
3413 if (s == NULL
3414 || ! bfd_set_section_alignment (abfd, s, 2))
3415 return FALSE;
3416 }
3417
3418 if (htab->is_vxworks
3419 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3420 return FALSE;
3421
3422 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3423 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3424 if (s == NULL)
3425 abort ();
3426
3427 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3428 if (htab->plt_type == PLT_VXWORKS)
3429 /* The VxWorks PLT is a loaded section with contents. */
3430 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3431 return bfd_set_section_flags (abfd, s, flags);
3432 }
3433
3434 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3435
3436 static void
3437 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3438 struct elf_link_hash_entry *dir,
3439 struct elf_link_hash_entry *ind)
3440 {
3441 struct ppc_elf_link_hash_entry *edir, *eind;
3442
3443 edir = (struct ppc_elf_link_hash_entry *) dir;
3444 eind = (struct ppc_elf_link_hash_entry *) ind;
3445
3446 edir->tls_mask |= eind->tls_mask;
3447 edir->has_sda_refs |= eind->has_sda_refs;
3448
3449 /* If called to transfer flags for a weakdef during processing
3450 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3451 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3452 if (!(ELIMINATE_COPY_RELOCS
3453 && eind->elf.root.type != bfd_link_hash_indirect
3454 && edir->elf.dynamic_adjusted))
3455 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3456
3457 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3458 edir->elf.ref_regular |= eind->elf.ref_regular;
3459 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3460 edir->elf.needs_plt |= eind->elf.needs_plt;
3461 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3462
3463 if (eind->dyn_relocs != NULL)
3464 {
3465 if (edir->dyn_relocs != NULL)
3466 {
3467 struct elf_dyn_relocs **pp;
3468 struct elf_dyn_relocs *p;
3469
3470 /* Add reloc counts against the indirect sym to the direct sym
3471 list. Merge any entries against the same section. */
3472 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3473 {
3474 struct elf_dyn_relocs *q;
3475
3476 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3477 if (q->sec == p->sec)
3478 {
3479 q->pc_count += p->pc_count;
3480 q->count += p->count;
3481 *pp = p->next;
3482 break;
3483 }
3484 if (q == NULL)
3485 pp = &p->next;
3486 }
3487 *pp = edir->dyn_relocs;
3488 }
3489
3490 edir->dyn_relocs = eind->dyn_relocs;
3491 eind->dyn_relocs = NULL;
3492 }
3493
3494 /* If we were called to copy over info for a weak sym, that's all.
3495 You might think dyn_relocs need not be copied over; After all,
3496 both syms will be dynamic or both non-dynamic so we're just
3497 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3498 code in ppc_elf_adjust_dynamic_symbol needs to check for
3499 dyn_relocs in read-only sections, and it does so on what is the
3500 DIR sym here. */
3501 if (eind->elf.root.type != bfd_link_hash_indirect)
3502 return;
3503
3504 /* Copy over the GOT refcount entries that we may have already seen to
3505 the symbol which just became indirect. */
3506 edir->elf.got.refcount += eind->elf.got.refcount;
3507 eind->elf.got.refcount = 0;
3508
3509 /* And plt entries. */
3510 if (eind->elf.plt.plist != NULL)
3511 {
3512 if (edir->elf.plt.plist != NULL)
3513 {
3514 struct plt_entry **entp;
3515 struct plt_entry *ent;
3516
3517 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3518 {
3519 struct plt_entry *dent;
3520
3521 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3522 if (dent->sec == ent->sec && dent->addend == ent->addend)
3523 {
3524 dent->plt.refcount += ent->plt.refcount;
3525 *entp = ent->next;
3526 break;
3527 }
3528 if (dent == NULL)
3529 entp = &ent->next;
3530 }
3531 *entp = edir->elf.plt.plist;
3532 }
3533
3534 edir->elf.plt.plist = eind->elf.plt.plist;
3535 eind->elf.plt.plist = NULL;
3536 }
3537
3538 if (eind->elf.dynindx != -1)
3539 {
3540 if (edir->elf.dynindx != -1)
3541 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3542 edir->elf.dynstr_index);
3543 edir->elf.dynindx = eind->elf.dynindx;
3544 edir->elf.dynstr_index = eind->elf.dynstr_index;
3545 eind->elf.dynindx = -1;
3546 eind->elf.dynstr_index = 0;
3547 }
3548 }
3549
3550 /* Hook called by the linker routine which adds symbols from an object
3551 file. We use it to put .comm items in .sbss, and not .bss. */
3552
3553 static bfd_boolean
3554 ppc_elf_add_symbol_hook (bfd *abfd,
3555 struct bfd_link_info *info,
3556 Elf_Internal_Sym *sym,
3557 const char **namep ATTRIBUTE_UNUSED,
3558 flagword *flagsp ATTRIBUTE_UNUSED,
3559 asection **secp,
3560 bfd_vma *valp)
3561 {
3562 if (sym->st_shndx == SHN_COMMON
3563 && !info->relocatable
3564 && is_ppc_elf (info->output_bfd)
3565 && sym->st_size <= elf_gp_size (abfd))
3566 {
3567 /* Common symbols less than or equal to -G nn bytes are automatically
3568 put into .sbss. */
3569 struct ppc_elf_link_hash_table *htab;
3570
3571 htab = ppc_elf_hash_table (info);
3572 if (htab->sbss == NULL)
3573 {
3574 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3575
3576 if (!htab->elf.dynobj)
3577 htab->elf.dynobj = abfd;
3578
3579 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3580 ".sbss",
3581 flags);
3582 if (htab->sbss == NULL)
3583 return FALSE;
3584 }
3585
3586 *secp = htab->sbss;
3587 *valp = sym->st_size;
3588 }
3589
3590 if ((abfd->flags & DYNAMIC) == 0
3591 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3592 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3593 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3594
3595 return TRUE;
3596 }
3597 \f
3598 static bfd_boolean
3599 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3600 {
3601 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3602
3603 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3604 TRUE, FALSE, TRUE);
3605 if (lsect->sym == NULL)
3606 return FALSE;
3607 if (lsect->sym->root.type == bfd_link_hash_new)
3608 lsect->sym->non_elf = 0;
3609 lsect->sym->ref_regular = 1;
3610 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3611 return TRUE;
3612 }
3613
3614 /* Create a special linker section. */
3615
3616 static bfd_boolean
3617 ppc_elf_create_linker_section (bfd *abfd,
3618 struct bfd_link_info *info,
3619 flagword flags,
3620 elf_linker_section_t *lsect)
3621 {
3622 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3623 asection *s;
3624
3625 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3626 | SEC_LINKER_CREATED);
3627
3628 /* Record the first bfd that needs the special sections. */
3629 if (!htab->elf.dynobj)
3630 htab->elf.dynobj = abfd;
3631
3632 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3633 lsect->name,
3634 flags);
3635 if (s == NULL
3636 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3637 return FALSE;
3638 lsect->section = s;
3639
3640 return create_sdata_sym (info, lsect);
3641 }
3642
3643 /* Find a linker generated pointer with a given addend and type. */
3644
3645 static elf_linker_section_pointers_t *
3646 elf_find_pointer_linker_section
3647 (elf_linker_section_pointers_t *linker_pointers,
3648 bfd_vma addend,
3649 elf_linker_section_t *lsect)
3650 {
3651 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3652 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3653 return linker_pointers;
3654
3655 return NULL;
3656 }
3657
3658 /* Allocate a pointer to live in a linker created section. */
3659
3660 static bfd_boolean
3661 elf_create_pointer_linker_section (bfd *abfd,
3662 elf_linker_section_t *lsect,
3663 struct elf_link_hash_entry *h,
3664 const Elf_Internal_Rela *rel)
3665 {
3666 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3667 elf_linker_section_pointers_t *linker_section_ptr;
3668 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3669 bfd_size_type amt;
3670
3671 BFD_ASSERT (lsect != NULL);
3672
3673 /* Is this a global symbol? */
3674 if (h != NULL)
3675 {
3676 struct ppc_elf_link_hash_entry *eh;
3677
3678 /* Has this symbol already been allocated? If so, our work is done. */
3679 eh = (struct ppc_elf_link_hash_entry *) h;
3680 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3681 rel->r_addend,
3682 lsect))
3683 return TRUE;
3684
3685 ptr_linker_section_ptr = &eh->linker_section_pointer;
3686 }
3687 else
3688 {
3689 BFD_ASSERT (is_ppc_elf (abfd));
3690
3691 /* Allocation of a pointer to a local symbol. */
3692 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3693
3694 /* Allocate a table to hold the local symbols if first time. */
3695 if (!ptr)
3696 {
3697 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3698
3699 amt = num_symbols;
3700 amt *= sizeof (elf_linker_section_pointers_t *);
3701 ptr = bfd_zalloc (abfd, amt);
3702
3703 if (!ptr)
3704 return FALSE;
3705
3706 elf_local_ptr_offsets (abfd) = ptr;
3707 }
3708
3709 /* Has this symbol already been allocated? If so, our work is done. */
3710 if (elf_find_pointer_linker_section (ptr[r_symndx],
3711 rel->r_addend,
3712 lsect))
3713 return TRUE;
3714
3715 ptr_linker_section_ptr = &ptr[r_symndx];
3716 }
3717
3718 /* Allocate space for a pointer in the linker section, and allocate
3719 a new pointer record from internal memory. */
3720 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3721 amt = sizeof (elf_linker_section_pointers_t);
3722 linker_section_ptr = bfd_alloc (abfd, amt);
3723
3724 if (!linker_section_ptr)
3725 return FALSE;
3726
3727 linker_section_ptr->next = *ptr_linker_section_ptr;
3728 linker_section_ptr->addend = rel->r_addend;
3729 linker_section_ptr->lsect = lsect;
3730 *ptr_linker_section_ptr = linker_section_ptr;
3731
3732 linker_section_ptr->offset = lsect->section->size;
3733 lsect->section->size += 4;
3734
3735 #ifdef DEBUG
3736 fprintf (stderr,
3737 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3738 lsect->name, (long) linker_section_ptr->offset,
3739 (long) lsect->section->size);
3740 #endif
3741
3742 return TRUE;
3743 }
3744
3745 static struct plt_entry **
3746 update_local_sym_info (bfd *abfd,
3747 Elf_Internal_Shdr *symtab_hdr,
3748 unsigned long r_symndx,
3749 int tls_type)
3750 {
3751 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3752 struct plt_entry **local_plt;
3753 char *local_got_tls_masks;
3754
3755 if (local_got_refcounts == NULL)
3756 {
3757 bfd_size_type size = symtab_hdr->sh_info;
3758
3759 size *= (sizeof (*local_got_refcounts)
3760 + sizeof (*local_plt)
3761 + sizeof (*local_got_tls_masks));
3762 local_got_refcounts = bfd_zalloc (abfd, size);
3763 if (local_got_refcounts == NULL)
3764 return NULL;
3765 elf_local_got_refcounts (abfd) = local_got_refcounts;
3766 }
3767
3768 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3769 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3770 local_got_tls_masks[r_symndx] |= tls_type;
3771 if (tls_type != PLT_IFUNC)
3772 local_got_refcounts[r_symndx] += 1;
3773 return local_plt + r_symndx;
3774 }
3775
3776 static bfd_boolean
3777 update_plt_info (bfd *abfd, struct plt_entry **plist,
3778 asection *sec, bfd_vma addend)
3779 {
3780 struct plt_entry *ent;
3781
3782 if (addend < 32768)
3783 sec = NULL;
3784 for (ent = *plist; ent != NULL; ent = ent->next)
3785 if (ent->sec == sec && ent->addend == addend)
3786 break;
3787 if (ent == NULL)
3788 {
3789 bfd_size_type amt = sizeof (*ent);
3790 ent = bfd_alloc (abfd, amt);
3791 if (ent == NULL)
3792 return FALSE;
3793 ent->next = *plist;
3794 ent->sec = sec;
3795 ent->addend = addend;
3796 ent->plt.refcount = 0;
3797 *plist = ent;
3798 }
3799 ent->plt.refcount += 1;
3800 return TRUE;
3801 }
3802
3803 static struct plt_entry *
3804 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3805 {
3806 struct plt_entry *ent;
3807
3808 if (addend < 32768)
3809 sec = NULL;
3810 for (ent = *plist; ent != NULL; ent = ent->next)
3811 if (ent->sec == sec && ent->addend == addend)
3812 break;
3813 return ent;
3814 }
3815
3816 static bfd_boolean
3817 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3818 {
3819 return (r_type == R_PPC_PLTREL24
3820 || r_type == R_PPC_LOCAL24PC
3821 || r_type == R_PPC_REL24
3822 || r_type == R_PPC_REL14
3823 || r_type == R_PPC_REL14_BRTAKEN
3824 || r_type == R_PPC_REL14_BRNTAKEN
3825 || r_type == R_PPC_ADDR24
3826 || r_type == R_PPC_ADDR14
3827 || r_type == R_PPC_ADDR14_BRTAKEN
3828 || r_type == R_PPC_ADDR14_BRNTAKEN);
3829 }
3830
3831 static void
3832 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3833 {
3834 (*_bfd_error_handler)
3835 (_("%B: relocation %s cannot be used when making a shared object"),
3836 abfd,
3837 ppc_elf_howto_table[r_type]->name);
3838 bfd_set_error (bfd_error_bad_value);
3839 }
3840
3841 /* Look through the relocs for a section during the first phase, and
3842 allocate space in the global offset table or procedure linkage
3843 table. */
3844
3845 static bfd_boolean
3846 ppc_elf_check_relocs (bfd *abfd,
3847 struct bfd_link_info *info,
3848 asection *sec,
3849 const Elf_Internal_Rela *relocs)
3850 {
3851 struct ppc_elf_link_hash_table *htab;
3852 Elf_Internal_Shdr *symtab_hdr;
3853 struct elf_link_hash_entry **sym_hashes;
3854 const Elf_Internal_Rela *rel;
3855 const Elf_Internal_Rela *rel_end;
3856 asection *got2, *sreloc;
3857 struct elf_link_hash_entry *tga;
3858
3859 if (info->relocatable)
3860 return TRUE;
3861
3862 /* Don't do anything special with non-loaded, non-alloced sections.
3863 In particular, any relocs in such sections should not affect GOT
3864 and PLT reference counting (ie. we don't allow them to create GOT
3865 or PLT entries), there's no possibility or desire to optimize TLS
3866 relocs, and there's not much point in propagating relocs to shared
3867 libs that the dynamic linker won't relocate. */
3868 if ((sec->flags & SEC_ALLOC) == 0)
3869 return TRUE;
3870
3871 #ifdef DEBUG
3872 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3873 sec, abfd);
3874 #endif
3875
3876 BFD_ASSERT (is_ppc_elf (abfd));
3877
3878 /* Initialize howto table if not already done. */
3879 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3880 ppc_elf_howto_init ();
3881
3882 htab = ppc_elf_hash_table (info);
3883 if (htab->glink == NULL)
3884 {
3885 if (htab->elf.dynobj == NULL)
3886 htab->elf.dynobj = abfd;
3887 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3888 return FALSE;
3889 }
3890 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3891 FALSE, FALSE, TRUE);
3892 symtab_hdr = &elf_symtab_hdr (abfd);
3893 sym_hashes = elf_sym_hashes (abfd);
3894 got2 = bfd_get_section_by_name (abfd, ".got2");
3895 sreloc = NULL;
3896
3897 rel_end = relocs + sec->reloc_count;
3898 for (rel = relocs; rel < rel_end; rel++)
3899 {
3900 unsigned long r_symndx;
3901 enum elf_ppc_reloc_type r_type;
3902 struct elf_link_hash_entry *h;
3903 int tls_type;
3904
3905 r_symndx = ELF32_R_SYM (rel->r_info);
3906 if (r_symndx < symtab_hdr->sh_info)
3907 h = NULL;
3908 else
3909 {
3910 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3911 while (h->root.type == bfd_link_hash_indirect
3912 || h->root.type == bfd_link_hash_warning)
3913 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3914 }
3915
3916 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3917 This shows up in particular in an R_PPC_ADDR32 in the eabi
3918 startup code. */
3919 if (h != NULL
3920 && htab->got == NULL
3921 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3922 {
3923 if (htab->elf.dynobj == NULL)
3924 htab->elf.dynobj = abfd;
3925 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3926 return FALSE;
3927 BFD_ASSERT (h == htab->elf.hgot);
3928 }
3929
3930 tls_type = 0;
3931 r_type = ELF32_R_TYPE (rel->r_info);
3932 if (h == NULL && !htab->is_vxworks)
3933 {
3934 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3935 abfd, r_symndx);
3936 if (isym == NULL)
3937 return FALSE;
3938
3939 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3940 {
3941 struct plt_entry **ifunc;
3942
3943 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3944 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3945 PLT_IFUNC);
3946 if (ifunc == NULL)
3947 return FALSE;
3948
3949 /* STT_GNU_IFUNC symbols must have a PLT entry;
3950 In a non-pie executable even when there are
3951 no plt calls. */
3952 if (!info->shared
3953 || is_branch_reloc (r_type))
3954 {
3955 bfd_vma addend = 0;
3956 if (r_type == R_PPC_PLTREL24)
3957 {
3958 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3959 if (info->shared)
3960 addend = rel->r_addend;
3961 }
3962 if (!update_plt_info (abfd, ifunc, got2, addend))
3963 return FALSE;
3964 }
3965 }
3966 }
3967
3968 if (!htab->is_vxworks
3969 && is_branch_reloc (r_type)
3970 && h != NULL
3971 && h == tga)
3972 {
3973 if (rel != relocs
3974 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3975 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3976 /* We have a new-style __tls_get_addr call with a marker
3977 reloc. */
3978 ;
3979 else
3980 /* Mark this section as having an old-style call. */
3981 sec->has_tls_get_addr_call = 1;
3982 }
3983
3984 switch (r_type)
3985 {
3986 case R_PPC_TLSGD:
3987 case R_PPC_TLSLD:
3988 /* These special tls relocs tie a call to __tls_get_addr with
3989 its parameter symbol. */
3990 break;
3991
3992 case R_PPC_GOT_TLSLD16:
3993 case R_PPC_GOT_TLSLD16_LO:
3994 case R_PPC_GOT_TLSLD16_HI:
3995 case R_PPC_GOT_TLSLD16_HA:
3996 tls_type = TLS_TLS | TLS_LD;
3997 goto dogottls;
3998
3999 case R_PPC_GOT_TLSGD16:
4000 case R_PPC_GOT_TLSGD16_LO:
4001 case R_PPC_GOT_TLSGD16_HI:
4002 case R_PPC_GOT_TLSGD16_HA:
4003 tls_type = TLS_TLS | TLS_GD;
4004 goto dogottls;
4005
4006 case R_PPC_GOT_TPREL16:
4007 case R_PPC_GOT_TPREL16_LO:
4008 case R_PPC_GOT_TPREL16_HI:
4009 case R_PPC_GOT_TPREL16_HA:
4010 if (!info->executable)
4011 info->flags |= DF_STATIC_TLS;
4012 tls_type = TLS_TLS | TLS_TPREL;
4013 goto dogottls;
4014
4015 case R_PPC_GOT_DTPREL16:
4016 case R_PPC_GOT_DTPREL16_LO:
4017 case R_PPC_GOT_DTPREL16_HI:
4018 case R_PPC_GOT_DTPREL16_HA:
4019 tls_type = TLS_TLS | TLS_DTPREL;
4020 dogottls:
4021 sec->has_tls_reloc = 1;
4022 /* Fall thru */
4023
4024 /* GOT16 relocations */
4025 case R_PPC_GOT16:
4026 case R_PPC_GOT16_LO:
4027 case R_PPC_GOT16_HI:
4028 case R_PPC_GOT16_HA:
4029 /* This symbol requires a global offset table entry. */
4030 if (htab->got == NULL)
4031 {
4032 if (htab->elf.dynobj == NULL)
4033 htab->elf.dynobj = abfd;
4034 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4035 return FALSE;
4036 }
4037 if (h != NULL)
4038 {
4039 h->got.refcount += 1;
4040 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4041 }
4042 else
4043 /* This is a global offset table entry for a local symbol. */
4044 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4045 return FALSE;
4046
4047 /* We may also need a plt entry if the symbol turns out to be
4048 an ifunc. */
4049 if (h != NULL && !info->shared)
4050 {
4051 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4052 return FALSE;
4053 }
4054 break;
4055
4056 /* Indirect .sdata relocation. */
4057 case R_PPC_EMB_SDAI16:
4058 if (info->shared)
4059 {
4060 bad_shared_reloc (abfd, r_type);
4061 return FALSE;
4062 }
4063 if (htab->sdata[0].section == NULL
4064 && !ppc_elf_create_linker_section (abfd, info, 0,
4065 &htab->sdata[0]))
4066 return FALSE;
4067 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
4068 h, rel))
4069 return FALSE;
4070 if (h != NULL)
4071 {
4072 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4073 h->non_got_ref = TRUE;
4074 }
4075 break;
4076
4077 /* Indirect .sdata2 relocation. */
4078 case R_PPC_EMB_SDA2I16:
4079 if (info->shared)
4080 {
4081 bad_shared_reloc (abfd, r_type);
4082 return FALSE;
4083 }
4084 if (htab->sdata[1].section == NULL
4085 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
4086 &htab->sdata[1]))
4087 return FALSE;
4088 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
4089 h, rel))
4090 return FALSE;
4091 if (h != NULL)
4092 {
4093 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4094 h->non_got_ref = TRUE;
4095 }
4096 break;
4097
4098 case R_PPC_VLE_SDAREL_LO16A:
4099 case R_PPC_VLE_SDAREL_LO16D:
4100 case R_PPC_VLE_SDAREL_HI16A:
4101 case R_PPC_VLE_SDAREL_HI16D:
4102 case R_PPC_VLE_SDAREL_HA16A:
4103 case R_PPC_VLE_SDAREL_HA16D:
4104 case R_PPC_SDAREL16:
4105 if (htab->sdata[0].sym == NULL
4106 && !create_sdata_sym (info, &htab->sdata[0]))
4107 return FALSE;
4108
4109 if (htab->sdata[1].sym == NULL
4110 && !create_sdata_sym (info, &htab->sdata[1]))
4111 return FALSE;
4112
4113 if (h != NULL)
4114 {
4115 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4116 h->non_got_ref = TRUE;
4117 }
4118 break;
4119
4120 case R_PPC_VLE_REL8:
4121 case R_PPC_VLE_REL15:
4122 case R_PPC_VLE_REL24:
4123 case R_PPC_VLE_LO16A:
4124 case R_PPC_VLE_LO16D:
4125 case R_PPC_VLE_HI16A:
4126 case R_PPC_VLE_HI16D:
4127 case R_PPC_VLE_HA16A:
4128 case R_PPC_VLE_HA16D:
4129 break;
4130
4131 case R_PPC_EMB_SDA2REL:
4132 if (info->shared)
4133 {
4134 bad_shared_reloc (abfd, r_type);
4135 return FALSE;
4136 }
4137 if (htab->sdata[1].sym == NULL
4138 && !create_sdata_sym (info, &htab->sdata[1]))
4139 return FALSE;
4140 if (h != NULL)
4141 {
4142 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4143 h->non_got_ref = TRUE;
4144 }
4145 break;
4146
4147 case R_PPC_VLE_SDA21_LO:
4148 case R_PPC_VLE_SDA21:
4149 case R_PPC_EMB_SDA21:
4150 case R_PPC_EMB_RELSDA:
4151 if (info->shared)
4152 {
4153 bad_shared_reloc (abfd, r_type);
4154 return FALSE;
4155 }
4156 if (htab->sdata[0].sym == NULL
4157 && !create_sdata_sym (info, &htab->sdata[0]))
4158 return FALSE;
4159 if (htab->sdata[1].sym == NULL
4160 && !create_sdata_sym (info, &htab->sdata[1]))
4161 return FALSE;
4162 if (h != NULL)
4163 {
4164 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4165 h->non_got_ref = TRUE;
4166 }
4167 break;
4168
4169 case R_PPC_EMB_NADDR32:
4170 case R_PPC_EMB_NADDR16:
4171 case R_PPC_EMB_NADDR16_LO:
4172 case R_PPC_EMB_NADDR16_HI:
4173 case R_PPC_EMB_NADDR16_HA:
4174 if (info->shared)
4175 {
4176 bad_shared_reloc (abfd, r_type);
4177 return FALSE;
4178 }
4179 if (h != NULL)
4180 h->non_got_ref = TRUE;
4181 break;
4182
4183 case R_PPC_PLTREL24:
4184 if (h == NULL)
4185 break;
4186 /* Fall through */
4187 case R_PPC_PLT32:
4188 case R_PPC_PLTREL32:
4189 case R_PPC_PLT16_LO:
4190 case R_PPC_PLT16_HI:
4191 case R_PPC_PLT16_HA:
4192 #ifdef DEBUG
4193 fprintf (stderr, "Reloc requires a PLT entry\n");
4194 #endif
4195 /* This symbol requires a procedure linkage table entry. We
4196 actually build the entry in finish_dynamic_symbol,
4197 because this might be a case of linking PIC code without
4198 linking in any dynamic objects, in which case we don't
4199 need to generate a procedure linkage table after all. */
4200
4201 if (h == NULL)
4202 {
4203 /* It does not make sense to have a procedure linkage
4204 table entry for a local symbol. */
4205 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4206 abfd, sec, rel->r_offset,
4207 ppc_elf_howto_table[r_type]->name);
4208 bfd_set_error (bfd_error_bad_value);
4209 return FALSE;
4210 }
4211 else
4212 {
4213 bfd_vma addend = 0;
4214
4215 if (r_type == R_PPC_PLTREL24)
4216 {
4217 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4218 if (info->shared)
4219 addend = rel->r_addend;
4220 }
4221 h->needs_plt = 1;
4222 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4223 return FALSE;
4224 }
4225 break;
4226
4227 /* The following relocations don't need to propagate the
4228 relocation if linking a shared object since they are
4229 section relative. */
4230 case R_PPC_SECTOFF:
4231 case R_PPC_SECTOFF_LO:
4232 case R_PPC_SECTOFF_HI:
4233 case R_PPC_SECTOFF_HA:
4234 case R_PPC_DTPREL16:
4235 case R_PPC_DTPREL16_LO:
4236 case R_PPC_DTPREL16_HI:
4237 case R_PPC_DTPREL16_HA:
4238 case R_PPC_TOC16:
4239 break;
4240
4241 case R_PPC_REL16:
4242 case R_PPC_REL16_LO:
4243 case R_PPC_REL16_HI:
4244 case R_PPC_REL16_HA:
4245 ppc_elf_tdata (abfd)->has_rel16 = 1;
4246 break;
4247
4248 /* These are just markers. */
4249 case R_PPC_TLS:
4250 case R_PPC_EMB_MRKREF:
4251 case R_PPC_NONE:
4252 case R_PPC_max:
4253 case R_PPC_RELAX:
4254 case R_PPC_RELAX_PLT:
4255 case R_PPC_RELAX_PLTREL24:
4256 break;
4257
4258 /* These should only appear in dynamic objects. */
4259 case R_PPC_COPY:
4260 case R_PPC_GLOB_DAT:
4261 case R_PPC_JMP_SLOT:
4262 case R_PPC_RELATIVE:
4263 case R_PPC_IRELATIVE:
4264 break;
4265
4266 /* These aren't handled yet. We'll report an error later. */
4267 case R_PPC_ADDR30:
4268 case R_PPC_EMB_RELSEC16:
4269 case R_PPC_EMB_RELST_LO:
4270 case R_PPC_EMB_RELST_HI:
4271 case R_PPC_EMB_RELST_HA:
4272 case R_PPC_EMB_BIT_FLD:
4273 break;
4274
4275 /* This refers only to functions defined in the shared library. */
4276 case R_PPC_LOCAL24PC:
4277 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4278 {
4279 htab->plt_type = PLT_OLD;
4280 htab->old_bfd = abfd;
4281 }
4282 break;
4283
4284 /* This relocation describes the C++ object vtable hierarchy.
4285 Reconstruct it for later use during GC. */
4286 case R_PPC_GNU_VTINHERIT:
4287 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4288 return FALSE;
4289 break;
4290
4291 /* This relocation describes which C++ vtable entries are actually
4292 used. Record for later use during GC. */
4293 case R_PPC_GNU_VTENTRY:
4294 BFD_ASSERT (h != NULL);
4295 if (h != NULL
4296 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4297 return FALSE;
4298 break;
4299
4300 /* We shouldn't really be seeing these. */
4301 case R_PPC_TPREL32:
4302 case R_PPC_TPREL16:
4303 case R_PPC_TPREL16_LO:
4304 case R_PPC_TPREL16_HI:
4305 case R_PPC_TPREL16_HA:
4306 if (!info->executable)
4307 info->flags |= DF_STATIC_TLS;
4308 goto dodyn;
4309
4310 /* Nor these. */
4311 case R_PPC_DTPMOD32:
4312 case R_PPC_DTPREL32:
4313 goto dodyn;
4314
4315 case R_PPC_REL32:
4316 if (h == NULL
4317 && got2 != NULL
4318 && (sec->flags & SEC_CODE) != 0
4319 && info->shared
4320 && htab->plt_type == PLT_UNSET)
4321 {
4322 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4323 the start of a function, which assembles to a REL32
4324 reference to .got2. If we detect one of these, then
4325 force the old PLT layout because the linker cannot
4326 reliably deduce the GOT pointer value needed for
4327 PLT call stubs. */
4328 asection *s;
4329 Elf_Internal_Sym *isym;
4330
4331 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4332 abfd, r_symndx);
4333 if (isym == NULL)
4334 return FALSE;
4335
4336 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4337 if (s == got2)
4338 {
4339 htab->plt_type = PLT_OLD;
4340 htab->old_bfd = abfd;
4341 }
4342 }
4343 if (h == NULL || h == htab->elf.hgot)
4344 break;
4345 /* fall through */
4346
4347 case R_PPC_ADDR32:
4348 case R_PPC_ADDR16:
4349 case R_PPC_ADDR16_LO:
4350 case R_PPC_ADDR16_HI:
4351 case R_PPC_ADDR16_HA:
4352 case R_PPC_UADDR32:
4353 case R_PPC_UADDR16:
4354 if (h != NULL && !info->shared)
4355 {
4356 /* We may need a plt entry if the symbol turns out to be
4357 a function defined in a dynamic object. */
4358 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4359 return FALSE;
4360
4361 /* We may need a copy reloc too. */
4362 h->non_got_ref = 1;
4363 h->pointer_equality_needed = 1;
4364 }
4365 goto dodyn;
4366
4367 case R_PPC_REL24:
4368 case R_PPC_REL14:
4369 case R_PPC_REL14_BRTAKEN:
4370 case R_PPC_REL14_BRNTAKEN:
4371 if (h == NULL)
4372 break;
4373 if (h == htab->elf.hgot)
4374 {
4375 if (htab->plt_type == PLT_UNSET)
4376 {
4377 htab->plt_type = PLT_OLD;
4378 htab->old_bfd = abfd;
4379 }
4380 break;
4381 }
4382 /* fall through */
4383
4384 case R_PPC_ADDR24:
4385 case R_PPC_ADDR14:
4386 case R_PPC_ADDR14_BRTAKEN:
4387 case R_PPC_ADDR14_BRNTAKEN:
4388 if (h != NULL && !info->shared)
4389 {
4390 /* We may need a plt entry if the symbol turns out to be
4391 a function defined in a dynamic object. */
4392 h->needs_plt = 1;
4393 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4394 return FALSE;
4395 break;
4396 }
4397
4398 dodyn:
4399 /* If we are creating a shared library, and this is a reloc
4400 against a global symbol, or a non PC relative reloc
4401 against a local symbol, then we need to copy the reloc
4402 into the shared library. However, if we are linking with
4403 -Bsymbolic, we do not need to copy a reloc against a
4404 global symbol which is defined in an object we are
4405 including in the link (i.e., DEF_REGULAR is set). At
4406 this point we have not seen all the input files, so it is
4407 possible that DEF_REGULAR is not set now but will be set
4408 later (it is never cleared). In case of a weak definition,
4409 DEF_REGULAR may be cleared later by a strong definition in
4410 a shared library. We account for that possibility below by
4411 storing information in the dyn_relocs field of the hash
4412 table entry. A similar situation occurs when creating
4413 shared libraries and symbol visibility changes render the
4414 symbol local.
4415
4416 If on the other hand, we are creating an executable, we
4417 may need to keep relocations for symbols satisfied by a
4418 dynamic library if we manage to avoid copy relocs for the
4419 symbol. */
4420 if ((info->shared
4421 && (must_be_dyn_reloc (info, r_type)
4422 || (h != NULL
4423 && (! info->symbolic
4424 || h->root.type == bfd_link_hash_defweak
4425 || !h->def_regular))))
4426 || (ELIMINATE_COPY_RELOCS
4427 && !info->shared
4428 && h != NULL
4429 && (h->root.type == bfd_link_hash_defweak
4430 || !h->def_regular)))
4431 {
4432 #ifdef DEBUG
4433 fprintf (stderr,
4434 "ppc_elf_check_relocs needs to "
4435 "create relocation for %s\n",
4436 (h && h->root.root.string
4437 ? h->root.root.string : "<unknown>"));
4438 #endif
4439 if (sreloc == NULL)
4440 {
4441 if (htab->elf.dynobj == NULL)
4442 htab->elf.dynobj = abfd;
4443
4444 sreloc = _bfd_elf_make_dynamic_reloc_section
4445 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4446
4447 if (sreloc == NULL)
4448 return FALSE;
4449 }
4450
4451 /* If this is a global symbol, we count the number of
4452 relocations we need for this symbol. */
4453 if (h != NULL)
4454 {
4455 struct elf_dyn_relocs *p;
4456 struct elf_dyn_relocs **rel_head;
4457
4458 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4459 p = *rel_head;
4460 if (p == NULL || p->sec != sec)
4461 {
4462 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4463 if (p == NULL)
4464 return FALSE;
4465 p->next = *rel_head;
4466 *rel_head = p;
4467 p->sec = sec;
4468 p->count = 0;
4469 p->pc_count = 0;
4470 }
4471 p->count += 1;
4472 if (!must_be_dyn_reloc (info, r_type))
4473 p->pc_count += 1;
4474 }
4475 else
4476 {
4477 /* Track dynamic relocs needed for local syms too.
4478 We really need local syms available to do this
4479 easily. Oh well. */
4480 struct ppc_dyn_relocs *p;
4481 struct ppc_dyn_relocs **rel_head;
4482 bfd_boolean is_ifunc;
4483 asection *s;
4484 void *vpp;
4485 Elf_Internal_Sym *isym;
4486
4487 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4488 abfd, r_symndx);
4489 if (isym == NULL)
4490 return FALSE;
4491
4492 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4493 if (s == NULL)
4494 s = sec;
4495
4496 vpp = &elf_section_data (s)->local_dynrel;
4497 rel_head = (struct ppc_dyn_relocs **) vpp;
4498 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4499 p = *rel_head;
4500 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4501 p = p->next;
4502 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4503 {
4504 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4505 if (p == NULL)
4506 return FALSE;
4507 p->next = *rel_head;
4508 *rel_head = p;
4509 p->sec = sec;
4510 p->ifunc = is_ifunc;
4511 p->count = 0;
4512 }
4513 p->count += 1;
4514 }
4515 }
4516
4517 break;
4518 }
4519 }
4520
4521 return TRUE;
4522 }
4523 \f
4524
4525 /* Merge object attributes from IBFD into OBFD. Raise an error if
4526 there are conflicting attributes. */
4527 static bfd_boolean
4528 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4529 {
4530 obj_attribute *in_attr, *in_attrs;
4531 obj_attribute *out_attr, *out_attrs;
4532
4533 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4534 {
4535 /* This is the first object. Copy the attributes. */
4536 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4537
4538 /* Use the Tag_null value to indicate the attributes have been
4539 initialized. */
4540 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4541
4542 return TRUE;
4543 }
4544
4545 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4546 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4547
4548 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4549 non-conflicting ones. */
4550 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4551 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4552 if (in_attr->i != out_attr->i)
4553 {
4554 out_attr->type = 1;
4555 if (out_attr->i == 0)
4556 out_attr->i = in_attr->i;
4557 else if (in_attr->i == 0)
4558 ;
4559 else if (out_attr->i == 1 && in_attr->i == 2)
4560 _bfd_error_handler
4561 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4562 else if (out_attr->i == 1 && in_attr->i == 3)
4563 _bfd_error_handler
4564 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4565 obfd, ibfd);
4566 else if (out_attr->i == 3 && in_attr->i == 1)
4567 _bfd_error_handler
4568 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4569 ibfd, obfd);
4570 else if (out_attr->i == 3 && in_attr->i == 2)
4571 _bfd_error_handler
4572 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4573 ibfd, obfd);
4574 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4575 _bfd_error_handler
4576 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4577 else if (in_attr->i > 3)
4578 _bfd_error_handler
4579 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4580 in_attr->i);
4581 else
4582 _bfd_error_handler
4583 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4584 out_attr->i);
4585 }
4586
4587 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4588 merge non-conflicting ones. */
4589 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4590 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4591 if (in_attr->i != out_attr->i)
4592 {
4593 const char *in_abi = NULL, *out_abi = NULL;
4594
4595 switch (in_attr->i)
4596 {
4597 case 1: in_abi = "generic"; break;
4598 case 2: in_abi = "AltiVec"; break;
4599 case 3: in_abi = "SPE"; break;
4600 }
4601
4602 switch (out_attr->i)
4603 {
4604 case 1: out_abi = "generic"; break;
4605 case 2: out_abi = "AltiVec"; break;
4606 case 3: out_abi = "SPE"; break;
4607 }
4608
4609 out_attr->type = 1;
4610 if (out_attr->i == 0)
4611 out_attr->i = in_attr->i;
4612 else if (in_attr->i == 0)
4613 ;
4614 /* For now, allow generic to transition to AltiVec or SPE
4615 without a warning. If GCC marked files with their stack
4616 alignment and used don't-care markings for files which are
4617 not affected by the vector ABI, we could warn about this
4618 case too. */
4619 else if (out_attr->i == 1)
4620 out_attr->i = in_attr->i;
4621 else if (in_attr->i == 1)
4622 ;
4623 else if (in_abi == NULL)
4624 _bfd_error_handler
4625 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4626 in_attr->i);
4627 else if (out_abi == NULL)
4628 _bfd_error_handler
4629 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4630 in_attr->i);
4631 else
4632 _bfd_error_handler
4633 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4634 ibfd, obfd, in_abi, out_abi);
4635 }
4636
4637 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4638 and merge non-conflicting ones. */
4639 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4640 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4641 if (in_attr->i != out_attr->i)
4642 {
4643 out_attr->type = 1;
4644 if (out_attr->i == 0)
4645 out_attr->i = in_attr->i;
4646 else if (in_attr->i == 0)
4647 ;
4648 else if (out_attr->i == 1 && in_attr->i == 2)
4649 _bfd_error_handler
4650 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4651 else if (out_attr->i == 2 && in_attr->i == 1)
4652 _bfd_error_handler
4653 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4654 else if (in_attr->i > 2)
4655 _bfd_error_handler
4656 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4657 in_attr->i);
4658 else
4659 _bfd_error_handler
4660 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4661 out_attr->i);
4662 }
4663
4664 /* Merge Tag_compatibility attributes and any common GNU ones. */
4665 _bfd_elf_merge_object_attributes (ibfd, obfd);
4666
4667 return TRUE;
4668 }
4669
4670 /* Merge backend specific data from an object file to the output
4671 object file when linking. */
4672
4673 static bfd_boolean
4674 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4675 {
4676 flagword old_flags;
4677 flagword new_flags;
4678 bfd_boolean error;
4679
4680 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4681 return TRUE;
4682
4683 /* Check if we have the same endianness. */
4684 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4685 return FALSE;
4686
4687 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4688 return FALSE;
4689
4690 new_flags = elf_elfheader (ibfd)->e_flags;
4691 old_flags = elf_elfheader (obfd)->e_flags;
4692 if (!elf_flags_init (obfd))
4693 {
4694 /* First call, no flags set. */
4695 elf_flags_init (obfd) = TRUE;
4696 elf_elfheader (obfd)->e_flags = new_flags;
4697 }
4698
4699 /* Compatible flags are ok. */
4700 else if (new_flags == old_flags)
4701 ;
4702
4703 /* Incompatible flags. */
4704 else
4705 {
4706 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4707 to be linked with either. */
4708 error = FALSE;
4709 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4710 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4711 {
4712 error = TRUE;
4713 (*_bfd_error_handler)
4714 (_("%B: compiled with -mrelocatable and linked with "
4715 "modules compiled normally"), ibfd);
4716 }
4717 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4718 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4719 {
4720 error = TRUE;
4721 (*_bfd_error_handler)
4722 (_("%B: compiled normally and linked with "
4723 "modules compiled with -mrelocatable"), ibfd);
4724 }
4725
4726 /* The output is -mrelocatable-lib iff both the input files are. */
4727 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4728 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4729
4730 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4731 but each input file is either -mrelocatable or -mrelocatable-lib. */
4732 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4733 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4734 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4735 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4736
4737 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4738 any module uses it. */
4739 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4740
4741 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4742 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4743
4744 /* Warn about any other mismatches. */
4745 if (new_flags != old_flags)
4746 {
4747 error = TRUE;
4748 (*_bfd_error_handler)
4749 (_("%B: uses different e_flags (0x%lx) fields "
4750 "than previous modules (0x%lx)"),
4751 ibfd, (long) new_flags, (long) old_flags);
4752 }
4753
4754 if (error)
4755 {
4756 bfd_set_error (bfd_error_bad_value);
4757 return FALSE;
4758 }
4759 }
4760
4761 return TRUE;
4762 }
4763
4764 static void
4765 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *contents,
4766 bfd_vma offset, bfd_vma relocation,
4767 split16_format_type split16_format)
4768
4769 {
4770 bfd_vma insn, top5, bottom11;
4771
4772 insn = bfd_get_32 (output_bfd, contents + offset);
4773 top5 = relocation >> 11;
4774 top5 = top5 << (split16_format == split16a_type ? 20 : 16);
4775 bottom11 = relocation & 0x7ff;
4776 insn |= top5;
4777 insn |= bottom11;
4778 bfd_put_32 (output_bfd, insn, contents + offset);
4779 }
4780
4781 \f
4782 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4783 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4784 int
4785 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4786 struct bfd_link_info *info,
4787 enum ppc_elf_plt_type plt_style,
4788 int emit_stub_syms)
4789 {
4790 struct ppc_elf_link_hash_table *htab;
4791 flagword flags;
4792
4793 htab = ppc_elf_hash_table (info);
4794
4795 htab->emit_stub_syms = emit_stub_syms;
4796
4797 if (htab->plt_type == PLT_UNSET)
4798 {
4799 struct elf_link_hash_entry *h;
4800
4801 if (plt_style == PLT_OLD)
4802 htab->plt_type = PLT_OLD;
4803 else if (info->shared
4804 && htab->elf.dynamic_sections_created
4805 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4806 FALSE, FALSE, TRUE)) != NULL
4807 && (h->type == STT_FUNC
4808 || h->needs_plt)
4809 && h->ref_regular
4810 && !(SYMBOL_CALLS_LOCAL (info, h)
4811 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4812 && h->root.type == bfd_link_hash_undefweak)))
4813 {
4814 /* Profiling of shared libs (and pies) is not supported with
4815 secure plt, because ppc32 does profiling before a
4816 function prologue and a secure plt pic call stubs needs
4817 r30 to be set up. */
4818 htab->plt_type = PLT_OLD;
4819 }
4820 else
4821 {
4822 bfd *ibfd;
4823 enum ppc_elf_plt_type plt_type = plt_style;
4824
4825 /* Look through the reloc flags left by ppc_elf_check_relocs.
4826 Use the old style bss plt if a file makes plt calls
4827 without using the new relocs, and if ld isn't given
4828 --secure-plt and we never see REL16 relocs. */
4829 if (plt_type == PLT_UNSET)
4830 plt_type = PLT_OLD;
4831 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4832 if (is_ppc_elf (ibfd))
4833 {
4834 if (ppc_elf_tdata (ibfd)->has_rel16)
4835 plt_type = PLT_NEW;
4836 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4837 {
4838 plt_type = PLT_OLD;
4839 htab->old_bfd = ibfd;
4840 break;
4841 }
4842 }
4843 htab->plt_type = plt_type;
4844 }
4845 }
4846 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4847 {
4848 if (htab->old_bfd != NULL)
4849 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4850 htab->old_bfd);
4851 else
4852 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4853 }
4854
4855 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4856
4857 if (htab->plt_type == PLT_NEW)
4858 {
4859 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4860 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4861
4862 /* The new PLT is a loaded section. */
4863 if (htab->plt != NULL
4864 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4865 return -1;
4866
4867 /* The new GOT is not executable. */
4868 if (htab->got != NULL
4869 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4870 return -1;
4871 }
4872 else
4873 {
4874 /* Stop an unused .glink section from affecting .text alignment. */
4875 if (htab->glink != NULL
4876 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4877 return -1;
4878 }
4879 return htab->plt_type == PLT_NEW;
4880 }
4881 \f
4882 /* Return the section that should be marked against GC for a given
4883 relocation. */
4884
4885 static asection *
4886 ppc_elf_gc_mark_hook (asection *sec,
4887 struct bfd_link_info *info,
4888 Elf_Internal_Rela *rel,
4889 struct elf_link_hash_entry *h,
4890 Elf_Internal_Sym *sym)
4891 {
4892 if (h != NULL)
4893 switch (ELF32_R_TYPE (rel->r_info))
4894 {
4895 case R_PPC_GNU_VTINHERIT:
4896 case R_PPC_GNU_VTENTRY:
4897 return NULL;
4898 }
4899
4900 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4901 }
4902
4903 /* Update the got, plt and dynamic reloc reference counts for the
4904 section being removed. */
4905
4906 static bfd_boolean
4907 ppc_elf_gc_sweep_hook (bfd *abfd,
4908 struct bfd_link_info *info,
4909 asection *sec,
4910 const Elf_Internal_Rela *relocs)
4911 {
4912 struct ppc_elf_link_hash_table *htab;
4913 Elf_Internal_Shdr *symtab_hdr;
4914 struct elf_link_hash_entry **sym_hashes;
4915 bfd_signed_vma *local_got_refcounts;
4916 const Elf_Internal_Rela *rel, *relend;
4917 asection *got2;
4918
4919 if (info->relocatable)
4920 return TRUE;
4921
4922 if ((sec->flags & SEC_ALLOC) == 0)
4923 return TRUE;
4924
4925 elf_section_data (sec)->local_dynrel = NULL;
4926
4927 htab = ppc_elf_hash_table (info);
4928 symtab_hdr = &elf_symtab_hdr (abfd);
4929 sym_hashes = elf_sym_hashes (abfd);
4930 local_got_refcounts = elf_local_got_refcounts (abfd);
4931 got2 = bfd_get_section_by_name (abfd, ".got2");
4932
4933 relend = relocs + sec->reloc_count;
4934 for (rel = relocs; rel < relend; rel++)
4935 {
4936 unsigned long r_symndx;
4937 enum elf_ppc_reloc_type r_type;
4938 struct elf_link_hash_entry *h = NULL;
4939
4940 r_symndx = ELF32_R_SYM (rel->r_info);
4941 if (r_symndx >= symtab_hdr->sh_info)
4942 {
4943 struct elf_dyn_relocs **pp, *p;
4944 struct ppc_elf_link_hash_entry *eh;
4945
4946 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4947 while (h->root.type == bfd_link_hash_indirect
4948 || h->root.type == bfd_link_hash_warning)
4949 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4950 eh = (struct ppc_elf_link_hash_entry *) h;
4951
4952 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4953 if (p->sec == sec)
4954 {
4955 /* Everything must go for SEC. */
4956 *pp = p->next;
4957 break;
4958 }
4959 }
4960
4961 r_type = ELF32_R_TYPE (rel->r_info);
4962 if (!htab->is_vxworks
4963 && h == NULL
4964 && local_got_refcounts != NULL
4965 && (!info->shared
4966 || is_branch_reloc (r_type)))
4967 {
4968 struct plt_entry **local_plt = (struct plt_entry **)
4969 (local_got_refcounts + symtab_hdr->sh_info);
4970 char *local_got_tls_masks = (char *)
4971 (local_plt + symtab_hdr->sh_info);
4972 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4973 {
4974 struct plt_entry **ifunc = local_plt + r_symndx;
4975 bfd_vma addend = 0;
4976 struct plt_entry *ent;
4977
4978 if (r_type == R_PPC_PLTREL24 && info->shared)
4979 addend = rel->r_addend;
4980 ent = find_plt_ent (ifunc, got2, addend);
4981 if (ent->plt.refcount > 0)
4982 ent->plt.refcount -= 1;
4983 continue;
4984 }
4985 }
4986
4987 switch (r_type)
4988 {
4989 case R_PPC_GOT_TLSLD16:
4990 case R_PPC_GOT_TLSLD16_LO:
4991 case R_PPC_GOT_TLSLD16_HI:
4992 case R_PPC_GOT_TLSLD16_HA:
4993 case R_PPC_GOT_TLSGD16:
4994 case R_PPC_GOT_TLSGD16_LO:
4995 case R_PPC_GOT_TLSGD16_HI:
4996 case R_PPC_GOT_TLSGD16_HA:
4997 case R_PPC_GOT_TPREL16:
4998 case R_PPC_GOT_TPREL16_LO:
4999 case R_PPC_GOT_TPREL16_HI:
5000 case R_PPC_GOT_TPREL16_HA:
5001 case R_PPC_GOT_DTPREL16:
5002 case R_PPC_GOT_DTPREL16_LO:
5003 case R_PPC_GOT_DTPREL16_HI:
5004 case R_PPC_GOT_DTPREL16_HA:
5005 case R_PPC_GOT16:
5006 case R_PPC_GOT16_LO:
5007 case R_PPC_GOT16_HI:
5008 case R_PPC_GOT16_HA:
5009 if (h != NULL)
5010 {
5011 if (h->got.refcount > 0)
5012 h->got.refcount--;
5013 if (!info->shared)
5014 {
5015 struct plt_entry *ent;
5016
5017 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5018 if (ent != NULL && ent->plt.refcount > 0)
5019 ent->plt.refcount -= 1;
5020 }
5021 }
5022 else if (local_got_refcounts != NULL)
5023 {
5024 if (local_got_refcounts[r_symndx] > 0)
5025 local_got_refcounts[r_symndx]--;
5026 }
5027 break;
5028
5029 case R_PPC_REL24:
5030 case R_PPC_REL14:
5031 case R_PPC_REL14_BRTAKEN:
5032 case R_PPC_REL14_BRNTAKEN:
5033 case R_PPC_REL32:
5034 if (h == NULL || h == htab->elf.hgot)
5035 break;
5036 /* Fall thru */
5037
5038 case R_PPC_ADDR32:
5039 case R_PPC_ADDR24:
5040 case R_PPC_ADDR16:
5041 case R_PPC_ADDR16_LO:
5042 case R_PPC_ADDR16_HI:
5043 case R_PPC_ADDR16_HA:
5044 case R_PPC_ADDR14:
5045 case R_PPC_ADDR14_BRTAKEN:
5046 case R_PPC_ADDR14_BRNTAKEN:
5047 case R_PPC_UADDR32:
5048 case R_PPC_UADDR16:
5049 if (info->shared)
5050 break;
5051
5052 case R_PPC_PLT32:
5053 case R_PPC_PLTREL24:
5054 case R_PPC_PLTREL32:
5055 case R_PPC_PLT16_LO:
5056 case R_PPC_PLT16_HI:
5057 case R_PPC_PLT16_HA:
5058 if (h != NULL)
5059 {
5060 bfd_vma addend = 0;
5061 struct plt_entry *ent;
5062
5063 if (r_type == R_PPC_PLTREL24 && info->shared)
5064 addend = rel->r_addend;
5065 ent = find_plt_ent (&h->plt.plist, got2, addend);
5066 if (ent != NULL && ent->plt.refcount > 0)
5067 ent->plt.refcount -= 1;
5068 }
5069 break;
5070
5071 default:
5072 break;
5073 }
5074 }
5075 return TRUE;
5076 }
5077 \f
5078 /* Set plt output section type, htab->tls_get_addr, and call the
5079 generic ELF tls_setup function. */
5080
5081 asection *
5082 ppc_elf_tls_setup (bfd *obfd,
5083 struct bfd_link_info *info,
5084 int no_tls_get_addr_opt)
5085 {
5086 struct ppc_elf_link_hash_table *htab;
5087
5088 htab = ppc_elf_hash_table (info);
5089 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5090 FALSE, FALSE, TRUE);
5091 if (!no_tls_get_addr_opt)
5092 {
5093 struct elf_link_hash_entry *opt, *tga;
5094 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5095 FALSE, FALSE, TRUE);
5096 if (opt != NULL
5097 && (opt->root.type == bfd_link_hash_defined
5098 || opt->root.type == bfd_link_hash_defweak))
5099 {
5100 /* If glibc supports an optimized __tls_get_addr call stub,
5101 signalled by the presence of __tls_get_addr_opt, and we'll
5102 be calling __tls_get_addr via a plt call stub, then
5103 make __tls_get_addr point to __tls_get_addr_opt. */
5104 tga = htab->tls_get_addr;
5105 if (htab->elf.dynamic_sections_created
5106 && tga != NULL
5107 && (tga->type == STT_FUNC
5108 || tga->needs_plt)
5109 && !(SYMBOL_CALLS_LOCAL (info, tga)
5110 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5111 && tga->root.type == bfd_link_hash_undefweak)))
5112 {
5113 struct plt_entry *ent;
5114 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5115 if (ent->plt.refcount > 0)
5116 break;
5117 if (ent != NULL)
5118 {
5119 tga->root.type = bfd_link_hash_indirect;
5120 tga->root.u.i.link = &opt->root;
5121 ppc_elf_copy_indirect_symbol (info, opt, tga);
5122 if (opt->dynindx != -1)
5123 {
5124 /* Use __tls_get_addr_opt in dynamic relocations. */
5125 opt->dynindx = -1;
5126 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5127 opt->dynstr_index);
5128 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5129 return FALSE;
5130 }
5131 htab->tls_get_addr = opt;
5132 }
5133 }
5134 }
5135 else
5136 no_tls_get_addr_opt = TRUE;
5137 }
5138 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
5139 if (htab->plt_type == PLT_NEW
5140 && htab->plt != NULL
5141 && htab->plt->output_section != NULL)
5142 {
5143 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5144 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5145 }
5146
5147 return _bfd_elf_tls_setup (obfd, info);
5148 }
5149
5150 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5151 HASH. */
5152
5153 static bfd_boolean
5154 branch_reloc_hash_match (const bfd *ibfd,
5155 const Elf_Internal_Rela *rel,
5156 const struct elf_link_hash_entry *hash)
5157 {
5158 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5159 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5160 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5161
5162 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5163 {
5164 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5165 struct elf_link_hash_entry *h;
5166
5167 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5168 while (h->root.type == bfd_link_hash_indirect
5169 || h->root.type == bfd_link_hash_warning)
5170 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5171 if (h == hash)
5172 return TRUE;
5173 }
5174 return FALSE;
5175 }
5176
5177 /* Run through all the TLS relocs looking for optimization
5178 opportunities. */
5179
5180 bfd_boolean
5181 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5182 struct bfd_link_info *info)
5183 {
5184 bfd *ibfd;
5185 asection *sec;
5186 struct ppc_elf_link_hash_table *htab;
5187 int pass;
5188
5189 if (info->relocatable || !info->executable)
5190 return TRUE;
5191
5192 htab = ppc_elf_hash_table (info);
5193 if (htab == NULL)
5194 return FALSE;
5195
5196 /* Make two passes through the relocs. First time check that tls
5197 relocs involved in setting up a tls_get_addr call are indeed
5198 followed by such a call. If they are not, don't do any tls
5199 optimization. On the second pass twiddle tls_mask flags to
5200 notify relocate_section that optimization can be done, and
5201 adjust got and plt refcounts. */
5202 for (pass = 0; pass < 2; ++pass)
5203 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5204 {
5205 Elf_Internal_Sym *locsyms = NULL;
5206 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5207 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5208
5209 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5210 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5211 {
5212 Elf_Internal_Rela *relstart, *rel, *relend;
5213 int expecting_tls_get_addr = 0;
5214
5215 /* Read the relocations. */
5216 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5217 info->keep_memory);
5218 if (relstart == NULL)
5219 return FALSE;
5220
5221 relend = relstart + sec->reloc_count;
5222 for (rel = relstart; rel < relend; rel++)
5223 {
5224 enum elf_ppc_reloc_type r_type;
5225 unsigned long r_symndx;
5226 struct elf_link_hash_entry *h = NULL;
5227 char *tls_mask;
5228 char tls_set, tls_clear;
5229 bfd_boolean is_local;
5230 bfd_signed_vma *got_count;
5231
5232 r_symndx = ELF32_R_SYM (rel->r_info);
5233 if (r_symndx >= symtab_hdr->sh_info)
5234 {
5235 struct elf_link_hash_entry **sym_hashes;
5236
5237 sym_hashes = elf_sym_hashes (ibfd);
5238 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5239 while (h->root.type == bfd_link_hash_indirect
5240 || h->root.type == bfd_link_hash_warning)
5241 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5242 }
5243
5244 is_local = FALSE;
5245 if (h == NULL
5246 || !h->def_dynamic)
5247 is_local = TRUE;
5248
5249 r_type = ELF32_R_TYPE (rel->r_info);
5250 /* If this section has old-style __tls_get_addr calls
5251 without marker relocs, then check that each
5252 __tls_get_addr call reloc is preceded by a reloc
5253 that conceivably belongs to the __tls_get_addr arg
5254 setup insn. If we don't find matching arg setup
5255 relocs, don't do any tls optimization. */
5256 if (pass == 0
5257 && sec->has_tls_get_addr_call
5258 && h != NULL
5259 && h == htab->tls_get_addr
5260 && !expecting_tls_get_addr
5261 && is_branch_reloc (r_type))
5262 {
5263 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5264 "TLS optimization disabled\n",
5265 ibfd, sec, rel->r_offset);
5266 if (elf_section_data (sec)->relocs != relstart)
5267 free (relstart);
5268 return TRUE;
5269 }
5270
5271 expecting_tls_get_addr = 0;
5272 switch (r_type)
5273 {
5274 case R_PPC_GOT_TLSLD16:
5275 case R_PPC_GOT_TLSLD16_LO:
5276 expecting_tls_get_addr = 1;
5277 /* Fall thru */
5278
5279 case R_PPC_GOT_TLSLD16_HI:
5280 case R_PPC_GOT_TLSLD16_HA:
5281 /* These relocs should never be against a symbol
5282 defined in a shared lib. Leave them alone if
5283 that turns out to be the case. */
5284 if (!is_local)
5285 continue;
5286
5287 /* LD -> LE */
5288 tls_set = 0;
5289 tls_clear = TLS_LD;
5290 break;
5291
5292 case R_PPC_GOT_TLSGD16:
5293 case R_PPC_GOT_TLSGD16_LO:
5294 expecting_tls_get_addr = 1;
5295 /* Fall thru */
5296
5297 case R_PPC_GOT_TLSGD16_HI:
5298 case R_PPC_GOT_TLSGD16_HA:
5299 if (is_local)
5300 /* GD -> LE */
5301 tls_set = 0;
5302 else
5303 /* GD -> IE */
5304 tls_set = TLS_TLS | TLS_TPRELGD;
5305 tls_clear = TLS_GD;
5306 break;
5307
5308 case R_PPC_GOT_TPREL16:
5309 case R_PPC_GOT_TPREL16_LO:
5310 case R_PPC_GOT_TPREL16_HI:
5311 case R_PPC_GOT_TPREL16_HA:
5312 if (is_local)
5313 {
5314 /* IE -> LE */
5315 tls_set = 0;
5316 tls_clear = TLS_TPREL;
5317 break;
5318 }
5319 else
5320 continue;
5321
5322 case R_PPC_TLSGD:
5323 case R_PPC_TLSLD:
5324 expecting_tls_get_addr = 2;
5325 tls_set = 0;
5326 tls_clear = 0;
5327 break;
5328
5329 default:
5330 continue;
5331 }
5332
5333 if (pass == 0)
5334 {
5335 if (!expecting_tls_get_addr
5336 || (expecting_tls_get_addr == 1
5337 && !sec->has_tls_get_addr_call))
5338 continue;
5339
5340 if (rel + 1 < relend
5341 && branch_reloc_hash_match (ibfd, rel + 1,
5342 htab->tls_get_addr))
5343 continue;
5344
5345 /* Uh oh, we didn't find the expected call. We
5346 could just mark this symbol to exclude it
5347 from tls optimization but it's safer to skip
5348 the entire optimization. */
5349 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5350 "TLS optimization disabled\n"),
5351 ibfd, sec, rel->r_offset);
5352 if (elf_section_data (sec)->relocs != relstart)
5353 free (relstart);
5354 return TRUE;
5355 }
5356
5357 if (expecting_tls_get_addr)
5358 {
5359 struct plt_entry *ent;
5360 bfd_vma addend = 0;
5361
5362 if (info->shared
5363 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5364 addend = rel[1].r_addend;
5365 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5366 got2, addend);
5367 if (ent != NULL && ent->plt.refcount > 0)
5368 ent->plt.refcount -= 1;
5369
5370 if (expecting_tls_get_addr == 2)
5371 continue;
5372 }
5373
5374 if (h != NULL)
5375 {
5376 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5377 got_count = &h->got.refcount;
5378 }
5379 else
5380 {
5381 bfd_signed_vma *lgot_refs;
5382 struct plt_entry **local_plt;
5383 char *lgot_masks;
5384
5385 if (locsyms == NULL)
5386 {
5387 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5388 if (locsyms == NULL)
5389 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5390 symtab_hdr->sh_info,
5391 0, NULL, NULL, NULL);
5392 if (locsyms == NULL)
5393 {
5394 if (elf_section_data (sec)->relocs != relstart)
5395 free (relstart);
5396 return FALSE;
5397 }
5398 }
5399 lgot_refs = elf_local_got_refcounts (ibfd);
5400 if (lgot_refs == NULL)
5401 abort ();
5402 local_plt = (struct plt_entry **)
5403 (lgot_refs + symtab_hdr->sh_info);
5404 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5405 tls_mask = &lgot_masks[r_symndx];
5406 got_count = &lgot_refs[r_symndx];
5407 }
5408
5409 if (tls_set == 0)
5410 {
5411 /* We managed to get rid of a got entry. */
5412 if (*got_count > 0)
5413 *got_count -= 1;
5414 }
5415
5416 *tls_mask |= tls_set;
5417 *tls_mask &= ~tls_clear;
5418 }
5419
5420 if (elf_section_data (sec)->relocs != relstart)
5421 free (relstart);
5422 }
5423
5424 if (locsyms != NULL
5425 && (symtab_hdr->contents != (unsigned char *) locsyms))
5426 {
5427 if (!info->keep_memory)
5428 free (locsyms);
5429 else
5430 symtab_hdr->contents = (unsigned char *) locsyms;
5431 }
5432 }
5433 return TRUE;
5434 }
5435 \f
5436 /* Return true if we have dynamic relocs that apply to read-only sections. */
5437
5438 static bfd_boolean
5439 readonly_dynrelocs (struct elf_link_hash_entry *h)
5440 {
5441 struct elf_dyn_relocs *p;
5442
5443 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5444 {
5445 asection *s = p->sec->output_section;
5446
5447 if (s != NULL
5448 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5449 == (SEC_READONLY | SEC_ALLOC)))
5450 return TRUE;
5451 }
5452 return FALSE;
5453 }
5454
5455 /* Adjust a symbol defined by a dynamic object and referenced by a
5456 regular object. The current definition is in some section of the
5457 dynamic object, but we're not including those sections. We have to
5458 change the definition to something the rest of the link can
5459 understand. */
5460
5461 static bfd_boolean
5462 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5463 struct elf_link_hash_entry *h)
5464 {
5465 struct ppc_elf_link_hash_table *htab;
5466 asection *s;
5467
5468 #ifdef DEBUG
5469 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5470 h->root.root.string);
5471 #endif
5472
5473 /* Make sure we know what is going on here. */
5474 htab = ppc_elf_hash_table (info);
5475 BFD_ASSERT (htab->elf.dynobj != NULL
5476 && (h->needs_plt
5477 || h->type == STT_GNU_IFUNC
5478 || h->u.weakdef != NULL
5479 || (h->def_dynamic
5480 && h->ref_regular
5481 && !h->def_regular)));
5482
5483 /* Deal with function syms. */
5484 if (h->type == STT_FUNC
5485 || h->type == STT_GNU_IFUNC
5486 || h->needs_plt)
5487 {
5488 /* Clear procedure linkage table information for any symbol that
5489 won't need a .plt entry. */
5490 struct plt_entry *ent;
5491 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5492 if (ent->plt.refcount > 0)
5493 break;
5494 if (ent == NULL
5495 || (h->type != STT_GNU_IFUNC
5496 && (SYMBOL_CALLS_LOCAL (info, h)
5497 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5498 && h->root.type == bfd_link_hash_undefweak))))
5499 {
5500 /* A PLT entry is not required/allowed when:
5501
5502 1. We are not using ld.so; because then the PLT entry
5503 can't be set up, so we can't use one. In this case,
5504 ppc_elf_adjust_dynamic_symbol won't even be called.
5505
5506 2. GC has rendered the entry unused.
5507
5508 3. We know for certain that a call to this symbol
5509 will go to this object, or will remain undefined. */
5510 h->plt.plist = NULL;
5511 h->needs_plt = 0;
5512 }
5513 else
5514 {
5515 /* After adjust_dynamic_symbol, non_got_ref set in the
5516 non-shared case means that we have allocated space in
5517 .dynbss for the symbol and thus dyn_relocs for this
5518 symbol should be discarded.
5519 If we get here we know we are making a PLT entry for this
5520 symbol, and in an executable we'd normally resolve
5521 relocations against this symbol to the PLT entry. Allow
5522 dynamic relocs if the reference is weak, and the dynamic
5523 relocs will not cause text relocation. */
5524 if (!h->ref_regular_nonweak
5525 && h->non_got_ref
5526 && h->type != STT_GNU_IFUNC
5527 && !htab->is_vxworks
5528 && !ppc_elf_hash_entry (h)->has_sda_refs
5529 && !readonly_dynrelocs (h))
5530 h->non_got_ref = 0;
5531 }
5532 return TRUE;
5533 }
5534 else
5535 h->plt.plist = NULL;
5536
5537 /* If this is a weak symbol, and there is a real definition, the
5538 processor independent code will have arranged for us to see the
5539 real definition first, and we can just use the same value. */
5540 if (h->u.weakdef != NULL)
5541 {
5542 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5543 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5544 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5545 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5546 if (ELIMINATE_COPY_RELOCS)
5547 h->non_got_ref = h->u.weakdef->non_got_ref;
5548 return TRUE;
5549 }
5550
5551 /* This is a reference to a symbol defined by a dynamic object which
5552 is not a function. */
5553
5554 /* If we are creating a shared library, we must presume that the
5555 only references to the symbol are via the global offset table.
5556 For such cases we need not do anything here; the relocations will
5557 be handled correctly by relocate_section. */
5558 if (info->shared)
5559 return TRUE;
5560
5561 /* If there are no references to this symbol that do not use the
5562 GOT, we don't need to generate a copy reloc. */
5563 if (!h->non_got_ref)
5564 return TRUE;
5565
5566 /* If we didn't find any dynamic relocs in read-only sections, then
5567 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5568 We can't do this if there are any small data relocations. This
5569 doesn't work on VxWorks, where we can not have dynamic
5570 relocations (other than copy and jump slot relocations) in an
5571 executable. */
5572 if (ELIMINATE_COPY_RELOCS
5573 && !ppc_elf_hash_entry (h)->has_sda_refs
5574 && !htab->is_vxworks
5575 && !h->def_regular
5576 && !readonly_dynrelocs (h))
5577 {
5578 h->non_got_ref = 0;
5579 return TRUE;
5580 }
5581
5582 /* We must allocate the symbol in our .dynbss section, which will
5583 become part of the .bss section of the executable. There will be
5584 an entry for this symbol in the .dynsym section. The dynamic
5585 object will contain position independent code, so all references
5586 from the dynamic object to this symbol will go through the global
5587 offset table. The dynamic linker will use the .dynsym entry to
5588 determine the address it must put in the global offset table, so
5589 both the dynamic object and the regular object will refer to the
5590 same memory location for the variable.
5591
5592 Of course, if the symbol is referenced using SDAREL relocs, we
5593 must instead allocate it in .sbss. */
5594
5595 if (ppc_elf_hash_entry (h)->has_sda_refs)
5596 s = htab->dynsbss;
5597 else
5598 s = htab->dynbss;
5599 BFD_ASSERT (s != NULL);
5600
5601 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5602 copy the initial value out of the dynamic object and into the
5603 runtime process image. We need to remember the offset into the
5604 .rela.bss section we are going to use. */
5605 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5606 {
5607 asection *srel;
5608
5609 if (ppc_elf_hash_entry (h)->has_sda_refs)
5610 srel = htab->relsbss;
5611 else
5612 srel = htab->relbss;
5613 BFD_ASSERT (srel != NULL);
5614 srel->size += sizeof (Elf32_External_Rela);
5615 h->needs_copy = 1;
5616 }
5617
5618 return _bfd_elf_adjust_dynamic_copy (h, s);
5619 }
5620 \f
5621 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5622 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5623 specifying the addend on the plt relocation. For -fpic code, the sym
5624 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5625 xxxxxxxx.got2.plt_pic32.<callee>. */
5626
5627 static bfd_boolean
5628 add_stub_sym (struct plt_entry *ent,
5629 struct elf_link_hash_entry *h,
5630 struct bfd_link_info *info)
5631 {
5632 struct elf_link_hash_entry *sh;
5633 size_t len1, len2, len3;
5634 char *name;
5635 const char *stub;
5636 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5637
5638 if (info->shared)
5639 stub = ".plt_pic32.";
5640 else
5641 stub = ".plt_call32.";
5642
5643 len1 = strlen (h->root.root.string);
5644 len2 = strlen (stub);
5645 len3 = 0;
5646 if (ent->sec)
5647 len3 = strlen (ent->sec->name);
5648 name = bfd_malloc (len1 + len2 + len3 + 9);
5649 if (name == NULL)
5650 return FALSE;
5651 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5652 if (ent->sec)
5653 memcpy (name + 8, ent->sec->name, len3);
5654 memcpy (name + 8 + len3, stub, len2);
5655 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5656 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5657 if (sh == NULL)
5658 return FALSE;
5659 if (sh->root.type == bfd_link_hash_new)
5660 {
5661 sh->root.type = bfd_link_hash_defined;
5662 sh->root.u.def.section = htab->glink;
5663 sh->root.u.def.value = ent->glink_offset;
5664 sh->ref_regular = 1;
5665 sh->def_regular = 1;
5666 sh->ref_regular_nonweak = 1;
5667 sh->forced_local = 1;
5668 sh->non_elf = 0;
5669 }
5670 return TRUE;
5671 }
5672
5673 /* Allocate NEED contiguous space in .got, and return the offset.
5674 Handles allocation of the got header when crossing 32k. */
5675
5676 static bfd_vma
5677 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5678 {
5679 bfd_vma where;
5680 unsigned int max_before_header;
5681
5682 if (htab->plt_type == PLT_VXWORKS)
5683 {
5684 where = htab->got->size;
5685 htab->got->size += need;
5686 }
5687 else
5688 {
5689 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5690 if (need <= htab->got_gap)
5691 {
5692 where = max_before_header - htab->got_gap;
5693 htab->got_gap -= need;
5694 }
5695 else
5696 {
5697 if (htab->got->size + need > max_before_header
5698 && htab->got->size <= max_before_header)
5699 {
5700 htab->got_gap = max_before_header - htab->got->size;
5701 htab->got->size = max_before_header + htab->got_header_size;
5702 }
5703 where = htab->got->size;
5704 htab->got->size += need;
5705 }
5706 }
5707 return where;
5708 }
5709
5710 /* Allocate space in associated reloc sections for dynamic relocs. */
5711
5712 static bfd_boolean
5713 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5714 {
5715 struct bfd_link_info *info = inf;
5716 struct ppc_elf_link_hash_entry *eh;
5717 struct ppc_elf_link_hash_table *htab;
5718 struct elf_dyn_relocs *p;
5719
5720 if (h->root.type == bfd_link_hash_indirect)
5721 return TRUE;
5722
5723 htab = ppc_elf_hash_table (info);
5724 if (htab->elf.dynamic_sections_created
5725 || h->type == STT_GNU_IFUNC)
5726 {
5727 struct plt_entry *ent;
5728 bfd_boolean doneone = FALSE;
5729 bfd_vma plt_offset = 0, glink_offset = 0;
5730 bfd_boolean dyn;
5731
5732 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5733 if (ent->plt.refcount > 0)
5734 {
5735 /* Make sure this symbol is output as a dynamic symbol. */
5736 if (h->dynindx == -1
5737 && !h->forced_local
5738 && !h->def_regular
5739 && htab->elf.dynamic_sections_created)
5740 {
5741 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5742 return FALSE;
5743 }
5744
5745 dyn = htab->elf.dynamic_sections_created;
5746 if (info->shared
5747 || h->type == STT_GNU_IFUNC
5748 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5749 {
5750 asection *s = htab->plt;
5751 if (!dyn || h->dynindx == -1)
5752 s = htab->iplt;
5753
5754 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5755 {
5756 if (!doneone)
5757 {
5758 plt_offset = s->size;
5759 s->size += 4;
5760 }
5761 ent->plt.offset = plt_offset;
5762
5763 s = htab->glink;
5764 if (!doneone || info->shared)
5765 {
5766 glink_offset = s->size;
5767 s->size += GLINK_ENTRY_SIZE;
5768 if (h == htab->tls_get_addr
5769 && !htab->no_tls_get_addr_opt)
5770 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5771 }
5772 if (!doneone
5773 && !info->shared
5774 && h->def_dynamic
5775 && !h->def_regular)
5776 {
5777 h->root.u.def.section = s;
5778 h->root.u.def.value = glink_offset;
5779 }
5780 ent->glink_offset = glink_offset;
5781
5782 if (htab->emit_stub_syms
5783 && !add_stub_sym (ent, h, info))
5784 return FALSE;
5785 }
5786 else
5787 {
5788 if (!doneone)
5789 {
5790 /* If this is the first .plt entry, make room
5791 for the special first entry. */
5792 if (s->size == 0)
5793 s->size += htab->plt_initial_entry_size;
5794
5795 /* The PowerPC PLT is actually composed of two
5796 parts, the first part is 2 words (for a load
5797 and a jump), and then there is a remaining
5798 word available at the end. */
5799 plt_offset = (htab->plt_initial_entry_size
5800 + (htab->plt_slot_size
5801 * ((s->size
5802 - htab->plt_initial_entry_size)
5803 / htab->plt_entry_size)));
5804
5805 /* If this symbol is not defined in a regular
5806 file, and we are not generating a shared
5807 library, then set the symbol to this location
5808 in the .plt. This is to avoid text
5809 relocations, and is required to make
5810 function pointers compare as equal between
5811 the normal executable and the shared library. */
5812 if (! info->shared
5813 && h->def_dynamic
5814 && !h->def_regular)
5815 {
5816 h->root.u.def.section = s;
5817 h->root.u.def.value = plt_offset;
5818 }
5819
5820 /* Make room for this entry. */
5821 s->size += htab->plt_entry_size;
5822 /* After the 8192nd entry, room for two entries
5823 is allocated. */
5824 if (htab->plt_type == PLT_OLD
5825 && (s->size - htab->plt_initial_entry_size)
5826 / htab->plt_entry_size
5827 > PLT_NUM_SINGLE_ENTRIES)
5828 s->size += htab->plt_entry_size;
5829 }
5830 ent->plt.offset = plt_offset;
5831 }
5832
5833 /* We also need to make an entry in the .rela.plt section. */
5834 if (!doneone)
5835 {
5836 if (!htab->elf.dynamic_sections_created
5837 || h->dynindx == -1)
5838 htab->reliplt->size += sizeof (Elf32_External_Rela);
5839 else
5840 {
5841 htab->relplt->size += sizeof (Elf32_External_Rela);
5842
5843 if (htab->plt_type == PLT_VXWORKS)
5844 {
5845 /* Allocate space for the unloaded relocations. */
5846 if (!info->shared
5847 && htab->elf.dynamic_sections_created)
5848 {
5849 if (ent->plt.offset
5850 == (bfd_vma) htab->plt_initial_entry_size)
5851 {
5852 htab->srelplt2->size
5853 += (sizeof (Elf32_External_Rela)
5854 * VXWORKS_PLTRESOLVE_RELOCS);
5855 }
5856
5857 htab->srelplt2->size
5858 += (sizeof (Elf32_External_Rela)
5859 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5860 }
5861
5862 /* Every PLT entry has an associated GOT entry in
5863 .got.plt. */
5864 htab->sgotplt->size += 4;
5865 }
5866 }
5867 doneone = TRUE;
5868 }
5869 }
5870 else
5871 ent->plt.offset = (bfd_vma) -1;
5872 }
5873 else
5874 ent->plt.offset = (bfd_vma) -1;
5875
5876 if (!doneone)
5877 {
5878 h->plt.plist = NULL;
5879 h->needs_plt = 0;
5880 }
5881 }
5882 else
5883 {
5884 h->plt.plist = NULL;
5885 h->needs_plt = 0;
5886 }
5887
5888 eh = (struct ppc_elf_link_hash_entry *) h;
5889 if (eh->elf.got.refcount > 0)
5890 {
5891 bfd_boolean dyn;
5892 unsigned int need;
5893
5894 /* Make sure this symbol is output as a dynamic symbol. */
5895 if (eh->elf.dynindx == -1
5896 && !eh->elf.forced_local
5897 && eh->elf.type != STT_GNU_IFUNC
5898 && htab->elf.dynamic_sections_created)
5899 {
5900 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5901 return FALSE;
5902 }
5903
5904 need = 0;
5905 if ((eh->tls_mask & TLS_TLS) != 0)
5906 {
5907 if ((eh->tls_mask & TLS_LD) != 0)
5908 {
5909 if (!eh->elf.def_dynamic)
5910 /* We'll just use htab->tlsld_got.offset. This should
5911 always be the case. It's a little odd if we have
5912 a local dynamic reloc against a non-local symbol. */
5913 htab->tlsld_got.refcount += 1;
5914 else
5915 need += 8;
5916 }
5917 if ((eh->tls_mask & TLS_GD) != 0)
5918 need += 8;
5919 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5920 need += 4;
5921 if ((eh->tls_mask & TLS_DTPREL) != 0)
5922 need += 4;
5923 }
5924 else
5925 need += 4;
5926 if (need == 0)
5927 eh->elf.got.offset = (bfd_vma) -1;
5928 else
5929 {
5930 eh->elf.got.offset = allocate_got (htab, need);
5931 dyn = htab->elf.dynamic_sections_created;
5932 if ((info->shared
5933 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5934 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5935 || eh->elf.root.type != bfd_link_hash_undefweak))
5936 {
5937 asection *rsec = htab->relgot;
5938
5939 if (eh->elf.type == STT_GNU_IFUNC)
5940 rsec = htab->reliplt;
5941 /* All the entries we allocated need relocs.
5942 Except LD only needs one. */
5943 if ((eh->tls_mask & TLS_LD) != 0
5944 && eh->elf.def_dynamic)
5945 need -= 4;
5946 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5947 }
5948 }
5949 }
5950 else
5951 eh->elf.got.offset = (bfd_vma) -1;
5952
5953 if (eh->dyn_relocs == NULL
5954 || !htab->elf.dynamic_sections_created)
5955 return TRUE;
5956
5957 /* In the shared -Bsymbolic case, discard space allocated for
5958 dynamic pc-relative relocs against symbols which turn out to be
5959 defined in regular objects. For the normal shared case, discard
5960 space for relocs that have become local due to symbol visibility
5961 changes. */
5962
5963 if (info->shared)
5964 {
5965 /* Relocs that use pc_count are those that appear on a call insn,
5966 or certain REL relocs (see must_be_dyn_reloc) that can be
5967 generated via assembly. We want calls to protected symbols to
5968 resolve directly to the function rather than going via the plt.
5969 If people want function pointer comparisons to work as expected
5970 then they should avoid writing weird assembly. */
5971 if (SYMBOL_CALLS_LOCAL (info, h))
5972 {
5973 struct elf_dyn_relocs **pp;
5974
5975 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5976 {
5977 p->count -= p->pc_count;
5978 p->pc_count = 0;
5979 if (p->count == 0)
5980 *pp = p->next;
5981 else
5982 pp = &p->next;
5983 }
5984 }
5985
5986 if (htab->is_vxworks)
5987 {
5988 struct elf_dyn_relocs **pp;
5989
5990 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5991 {
5992 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5993 *pp = p->next;
5994 else
5995 pp = &p->next;
5996 }
5997 }
5998
5999 /* Discard relocs on undefined symbols that must be local. */
6000 if (eh->dyn_relocs != NULL
6001 && h->root.type == bfd_link_hash_undefined
6002 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6003 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6004 eh->dyn_relocs = NULL;
6005
6006 /* Also discard relocs on undefined weak syms with non-default
6007 visibility. */
6008 if (eh->dyn_relocs != NULL
6009 && h->root.type == bfd_link_hash_undefweak)
6010 {
6011 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6012 eh->dyn_relocs = NULL;
6013
6014 /* Make sure undefined weak symbols are output as a dynamic
6015 symbol in PIEs. */
6016 else if (h->dynindx == -1
6017 && !h->forced_local
6018 && !h->def_regular)
6019 {
6020 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6021 return FALSE;
6022 }
6023 }
6024 }
6025 else if (ELIMINATE_COPY_RELOCS)
6026 {
6027 /* For the non-shared case, discard space for relocs against
6028 symbols which turn out to need copy relocs or are not
6029 dynamic. */
6030
6031 if (!h->non_got_ref
6032 && !h->def_regular)
6033 {
6034 /* Make sure this symbol is output as a dynamic symbol.
6035 Undefined weak syms won't yet be marked as dynamic. */
6036 if (h->dynindx == -1
6037 && !h->forced_local)
6038 {
6039 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6040 return FALSE;
6041 }
6042
6043 /* If that succeeded, we know we'll be keeping all the
6044 relocs. */
6045 if (h->dynindx != -1)
6046 goto keep;
6047 }
6048
6049 eh->dyn_relocs = NULL;
6050
6051 keep: ;
6052 }
6053
6054 /* Finally, allocate space. */
6055 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6056 {
6057 asection *sreloc = elf_section_data (p->sec)->sreloc;
6058 if (eh->elf.type == STT_GNU_IFUNC)
6059 sreloc = htab->reliplt;
6060 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6061 }
6062
6063 return TRUE;
6064 }
6065
6066 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6067 read-only sections. */
6068
6069 static bfd_boolean
6070 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6071 {
6072 if (h->root.type == bfd_link_hash_indirect)
6073 return TRUE;
6074
6075 if (readonly_dynrelocs (h))
6076 {
6077 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6078
6079 /* Not an error, just cut short the traversal. */
6080 return FALSE;
6081 }
6082 return TRUE;
6083 }
6084
6085 static const unsigned char glink_eh_frame_cie[] =
6086 {
6087 0, 0, 0, 16, /* length. */
6088 0, 0, 0, 0, /* id. */
6089 1, /* CIE version. */
6090 'z', 'R', 0, /* Augmentation string. */
6091 4, /* Code alignment. */
6092 0x7c, /* Data alignment. */
6093 65, /* RA reg. */
6094 1, /* Augmentation size. */
6095 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6096 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6097 };
6098
6099 /* Set the sizes of the dynamic sections. */
6100
6101 static bfd_boolean
6102 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6103 struct bfd_link_info *info)
6104 {
6105 struct ppc_elf_link_hash_table *htab;
6106 asection *s;
6107 bfd_boolean relocs;
6108 bfd *ibfd;
6109
6110 #ifdef DEBUG
6111 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6112 #endif
6113
6114 htab = ppc_elf_hash_table (info);
6115 BFD_ASSERT (htab->elf.dynobj != NULL);
6116
6117 if (elf_hash_table (info)->dynamic_sections_created)
6118 {
6119 /* Set the contents of the .interp section to the interpreter. */
6120 if (info->executable)
6121 {
6122 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6123 BFD_ASSERT (s != NULL);
6124 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6125 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6126 }
6127 }
6128
6129 if (htab->plt_type == PLT_OLD)
6130 htab->got_header_size = 16;
6131 else if (htab->plt_type == PLT_NEW)
6132 htab->got_header_size = 12;
6133
6134 /* Set up .got offsets for local syms, and space for local dynamic
6135 relocs. */
6136 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6137 {
6138 bfd_signed_vma *local_got;
6139 bfd_signed_vma *end_local_got;
6140 struct plt_entry **local_plt;
6141 struct plt_entry **end_local_plt;
6142 char *lgot_masks;
6143 bfd_size_type locsymcount;
6144 Elf_Internal_Shdr *symtab_hdr;
6145
6146 if (!is_ppc_elf (ibfd))
6147 continue;
6148
6149 for (s = ibfd->sections; s != NULL; s = s->next)
6150 {
6151 struct ppc_dyn_relocs *p;
6152
6153 for (p = ((struct ppc_dyn_relocs *)
6154 elf_section_data (s)->local_dynrel);
6155 p != NULL;
6156 p = p->next)
6157 {
6158 if (!bfd_is_abs_section (p->sec)
6159 && bfd_is_abs_section (p->sec->output_section))
6160 {
6161 /* Input section has been discarded, either because
6162 it is a copy of a linkonce section or due to
6163 linker script /DISCARD/, so we'll be discarding
6164 the relocs too. */
6165 }
6166 else if (htab->is_vxworks
6167 && strcmp (p->sec->output_section->name,
6168 ".tls_vars") == 0)
6169 {
6170 /* Relocations in vxworks .tls_vars sections are
6171 handled specially by the loader. */
6172 }
6173 else if (p->count != 0)
6174 {
6175 asection *sreloc = elf_section_data (p->sec)->sreloc;
6176 if (p->ifunc)
6177 sreloc = htab->reliplt;
6178 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6179 if ((p->sec->output_section->flags
6180 & (SEC_READONLY | SEC_ALLOC))
6181 == (SEC_READONLY | SEC_ALLOC))
6182 info->flags |= DF_TEXTREL;
6183 }
6184 }
6185 }
6186
6187 local_got = elf_local_got_refcounts (ibfd);
6188 if (!local_got)
6189 continue;
6190
6191 symtab_hdr = &elf_symtab_hdr (ibfd);
6192 locsymcount = symtab_hdr->sh_info;
6193 end_local_got = local_got + locsymcount;
6194 local_plt = (struct plt_entry **) end_local_got;
6195 end_local_plt = local_plt + locsymcount;
6196 lgot_masks = (char *) end_local_plt;
6197
6198 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6199 if (*local_got > 0)
6200 {
6201 unsigned int need = 0;
6202 if ((*lgot_masks & TLS_TLS) != 0)
6203 {
6204 if ((*lgot_masks & TLS_GD) != 0)
6205 need += 8;
6206 if ((*lgot_masks & TLS_LD) != 0)
6207 htab->tlsld_got.refcount += 1;
6208 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6209 need += 4;
6210 if ((*lgot_masks & TLS_DTPREL) != 0)
6211 need += 4;
6212 }
6213 else
6214 need += 4;
6215 if (need == 0)
6216 *local_got = (bfd_vma) -1;
6217 else
6218 {
6219 *local_got = allocate_got (htab, need);
6220 if (info->shared)
6221 {
6222 asection *srel = htab->relgot;
6223 if ((*lgot_masks & PLT_IFUNC) != 0)
6224 srel = htab->reliplt;
6225 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6226 }
6227 }
6228 }
6229 else
6230 *local_got = (bfd_vma) -1;
6231
6232 if (htab->is_vxworks)
6233 continue;
6234
6235 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6236 for (; local_plt < end_local_plt; ++local_plt)
6237 {
6238 struct plt_entry *ent;
6239 bfd_boolean doneone = FALSE;
6240 bfd_vma plt_offset = 0, glink_offset = 0;
6241
6242 for (ent = *local_plt; ent != NULL; ent = ent->next)
6243 if (ent->plt.refcount > 0)
6244 {
6245 s = htab->iplt;
6246
6247 if (!doneone)
6248 {
6249 plt_offset = s->size;
6250 s->size += 4;
6251 }
6252 ent->plt.offset = plt_offset;
6253
6254 s = htab->glink;
6255 if (!doneone || info->shared)
6256 {
6257 glink_offset = s->size;
6258 s->size += GLINK_ENTRY_SIZE;
6259 }
6260 ent->glink_offset = glink_offset;
6261
6262 if (!doneone)
6263 {
6264 htab->reliplt->size += sizeof (Elf32_External_Rela);
6265 doneone = TRUE;
6266 }
6267 }
6268 else
6269 ent->plt.offset = (bfd_vma) -1;
6270 }
6271 }
6272
6273 /* Allocate space for global sym dynamic relocs. */
6274 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6275
6276 if (htab->tlsld_got.refcount > 0)
6277 {
6278 htab->tlsld_got.offset = allocate_got (htab, 8);
6279 if (info->shared)
6280 htab->relgot->size += sizeof (Elf32_External_Rela);
6281 }
6282 else
6283 htab->tlsld_got.offset = (bfd_vma) -1;
6284
6285 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6286 {
6287 unsigned int g_o_t = 32768;
6288
6289 /* If we haven't allocated the header, do so now. When we get here,
6290 for old plt/got the got size will be 0 to 32764 (not allocated),
6291 or 32780 to 65536 (header allocated). For new plt/got, the
6292 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6293 if (htab->got->size <= 32768)
6294 {
6295 g_o_t = htab->got->size;
6296 if (htab->plt_type == PLT_OLD)
6297 g_o_t += 4;
6298 htab->got->size += htab->got_header_size;
6299 }
6300
6301 htab->elf.hgot->root.u.def.value = g_o_t;
6302 }
6303 if (info->shared)
6304 {
6305 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6306 if (sda != NULL
6307 && !(sda->root.type == bfd_link_hash_defined
6308 || sda->root.type == bfd_link_hash_defweak))
6309 {
6310 sda->root.type = bfd_link_hash_defined;
6311 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6312 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6313 }
6314 }
6315
6316 if (htab->glink != NULL
6317 && htab->glink->size != 0
6318 && htab->elf.dynamic_sections_created)
6319 {
6320 htab->glink_pltresolve = htab->glink->size;
6321 /* Space for the branch table. */
6322 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6323 /* Pad out to align the start of PLTresolve. */
6324 htab->glink->size += -htab->glink->size & 15;
6325 htab->glink->size += GLINK_PLTRESOLVE;
6326
6327 if (htab->emit_stub_syms)
6328 {
6329 struct elf_link_hash_entry *sh;
6330 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6331 TRUE, FALSE, FALSE);
6332 if (sh == NULL)
6333 return FALSE;
6334 if (sh->root.type == bfd_link_hash_new)
6335 {
6336 sh->root.type = bfd_link_hash_defined;
6337 sh->root.u.def.section = htab->glink;
6338 sh->root.u.def.value = htab->glink_pltresolve;
6339 sh->ref_regular = 1;
6340 sh->def_regular = 1;
6341 sh->ref_regular_nonweak = 1;
6342 sh->forced_local = 1;
6343 sh->non_elf = 0;
6344 }
6345 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6346 TRUE, FALSE, FALSE);
6347 if (sh == NULL)
6348 return FALSE;
6349 if (sh->root.type == bfd_link_hash_new)
6350 {
6351 sh->root.type = bfd_link_hash_defined;
6352 sh->root.u.def.section = htab->glink;
6353 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6354 sh->ref_regular = 1;
6355 sh->def_regular = 1;
6356 sh->ref_regular_nonweak = 1;
6357 sh->forced_local = 1;
6358 sh->non_elf = 0;
6359 }
6360 }
6361 }
6362
6363 if (htab->glink != NULL
6364 && htab->glink->size != 0
6365 && htab->glink_eh_frame != NULL
6366 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6367 && _bfd_elf_eh_frame_present (info))
6368 {
6369 s = htab->glink_eh_frame;
6370 s->size = sizeof (glink_eh_frame_cie) + 20;
6371 if (info->shared)
6372 {
6373 s->size += 4;
6374 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6375 s->size += 4;
6376 }
6377 }
6378
6379 /* We've now determined the sizes of the various dynamic sections.
6380 Allocate memory for them. */
6381 relocs = FALSE;
6382 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6383 {
6384 bfd_boolean strip_section = TRUE;
6385
6386 if ((s->flags & SEC_LINKER_CREATED) == 0)
6387 continue;
6388
6389 if (s == htab->plt
6390 || s == htab->got)
6391 {
6392 /* We'd like to strip these sections if they aren't needed, but if
6393 we've exported dynamic symbols from them we must leave them.
6394 It's too late to tell BFD to get rid of the symbols. */
6395 if (htab->elf.hplt != NULL)
6396 strip_section = FALSE;
6397 /* Strip this section if we don't need it; see the
6398 comment below. */
6399 }
6400 else if (s == htab->iplt
6401 || s == htab->glink
6402 || s == htab->glink_eh_frame
6403 || s == htab->sgotplt
6404 || s == htab->sbss
6405 || s == htab->dynbss
6406 || s == htab->dynsbss
6407 || s == htab->sdata[0].section
6408 || s == htab->sdata[1].section)
6409 {
6410 /* Strip these too. */
6411 }
6412 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6413 ".rela"))
6414 {
6415 if (s->size != 0)
6416 {
6417 /* Remember whether there are any relocation sections. */
6418 relocs = TRUE;
6419
6420 /* We use the reloc_count field as a counter if we need
6421 to copy relocs into the output file. */
6422 s->reloc_count = 0;
6423 }
6424 }
6425 else
6426 {
6427 /* It's not one of our sections, so don't allocate space. */
6428 continue;
6429 }
6430
6431 if (s->size == 0 && strip_section)
6432 {
6433 /* If we don't need this section, strip it from the
6434 output file. This is mostly to handle .rela.bss and
6435 .rela.plt. We must create both sections in
6436 create_dynamic_sections, because they must be created
6437 before the linker maps input sections to output
6438 sections. The linker does that before
6439 adjust_dynamic_symbol is called, and it is that
6440 function which decides whether anything needs to go
6441 into these sections. */
6442 s->flags |= SEC_EXCLUDE;
6443 continue;
6444 }
6445
6446 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6447 continue;
6448
6449 /* Allocate memory for the section contents. */
6450 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6451 if (s->contents == NULL)
6452 return FALSE;
6453 }
6454
6455 if (htab->elf.dynamic_sections_created)
6456 {
6457 /* Add some entries to the .dynamic section. We fill in the
6458 values later, in ppc_elf_finish_dynamic_sections, but we
6459 must add the entries now so that we get the correct size for
6460 the .dynamic section. The DT_DEBUG entry is filled in by the
6461 dynamic linker and used by the debugger. */
6462 #define add_dynamic_entry(TAG, VAL) \
6463 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6464
6465 if (info->executable)
6466 {
6467 if (!add_dynamic_entry (DT_DEBUG, 0))
6468 return FALSE;
6469 }
6470
6471 if (htab->plt != NULL && htab->plt->size != 0)
6472 {
6473 if (!add_dynamic_entry (DT_PLTGOT, 0)
6474 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6475 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6476 || !add_dynamic_entry (DT_JMPREL, 0))
6477 return FALSE;
6478 }
6479
6480 if (htab->glink != NULL && htab->glink->size != 0)
6481 {
6482 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6483 return FALSE;
6484 if (!htab->no_tls_get_addr_opt
6485 && htab->tls_get_addr != NULL
6486 && htab->tls_get_addr->plt.plist != NULL
6487 && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
6488 return FALSE;
6489 }
6490
6491 if (relocs)
6492 {
6493 if (!add_dynamic_entry (DT_RELA, 0)
6494 || !add_dynamic_entry (DT_RELASZ, 0)
6495 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6496 return FALSE;
6497 }
6498
6499 /* If any dynamic relocs apply to a read-only section, then we
6500 need a DT_TEXTREL entry. */
6501 if ((info->flags & DF_TEXTREL) == 0)
6502 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6503 info);
6504
6505 if ((info->flags & DF_TEXTREL) != 0)
6506 {
6507 if (!add_dynamic_entry (DT_TEXTREL, 0))
6508 return FALSE;
6509 }
6510 if (htab->is_vxworks
6511 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6512 return FALSE;
6513 }
6514 #undef add_dynamic_entry
6515
6516 if (htab->glink_eh_frame != NULL
6517 && htab->glink_eh_frame->contents != NULL)
6518 {
6519 unsigned char *p = htab->glink_eh_frame->contents;
6520 bfd_vma val;
6521
6522 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6523 /* CIE length (rewrite in case little-endian). */
6524 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6525 p += sizeof (glink_eh_frame_cie);
6526 /* FDE length. */
6527 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6528 bfd_put_32 (htab->elf.dynobj, val, p);
6529 p += 4;
6530 /* CIE pointer. */
6531 val = p - htab->glink_eh_frame->contents;
6532 bfd_put_32 (htab->elf.dynobj, val, p);
6533 p += 4;
6534 /* Offset to .glink. Set later. */
6535 p += 4;
6536 /* .glink size. */
6537 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6538 p += 4;
6539 /* Augmentation. */
6540 p += 1;
6541
6542 if (info->shared
6543 && htab->elf.dynamic_sections_created)
6544 {
6545 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6546 if (adv < 64)
6547 *p++ = DW_CFA_advance_loc + adv;
6548 else if (adv < 256)
6549 {
6550 *p++ = DW_CFA_advance_loc1;
6551 *p++ = adv;
6552 }
6553 else if (adv < 65536)
6554 {
6555 *p++ = DW_CFA_advance_loc2;
6556 bfd_put_16 (htab->elf.dynobj, adv, p);
6557 p += 2;
6558 }
6559 else
6560 {
6561 *p++ = DW_CFA_advance_loc4;
6562 bfd_put_32 (htab->elf.dynobj, adv, p);
6563 p += 4;
6564 }
6565 *p++ = DW_CFA_register;
6566 *p++ = 65;
6567 p++;
6568 *p++ = DW_CFA_advance_loc + 4;
6569 *p++ = DW_CFA_restore_extended;
6570 *p++ = 65;
6571 }
6572 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6573 == htab->glink_eh_frame->size);
6574 }
6575
6576 return TRUE;
6577 }
6578
6579 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6580
6581 static bfd_boolean
6582 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6583 {
6584 if (h->plt.plist != NULL
6585 && !h->def_regular
6586 && (!h->pointer_equality_needed
6587 || !h->ref_regular_nonweak))
6588 return FALSE;
6589
6590 return _bfd_elf_hash_symbol (h);
6591 }
6592 \f
6593 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6594
6595 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6596 used for some functions that are allowed to break the ABI). */
6597 static const int shared_stub_entry[] =
6598 {
6599 0x7c0802a6, /* mflr 0 */
6600 0x429f0005, /* bcl 20, 31, .Lxxx */
6601 0x7d8802a6, /* mflr 12 */
6602 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6603 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
6604 0x7c0803a6, /* mtlr 0 */
6605 0x7d8903a6, /* mtctr 12 */
6606 0x4e800420, /* bctr */
6607 };
6608
6609 static const int stub_entry[] =
6610 {
6611 0x3d800000, /* lis 12,xxx@ha */
6612 0x398c0000, /* addi 12,12,xxx@l */
6613 0x7d8903a6, /* mtctr 12 */
6614 0x4e800420, /* bctr */
6615 };
6616
6617 static bfd_boolean
6618 ppc_elf_relax_section (bfd *abfd,
6619 asection *isec,
6620 struct bfd_link_info *link_info,
6621 bfd_boolean *again)
6622 {
6623 struct one_fixup
6624 {
6625 struct one_fixup *next;
6626 asection *tsec;
6627 /* Final link, can use the symbol offset. For a
6628 relocatable link we use the symbol's index. */
6629 bfd_vma toff;
6630 bfd_vma trampoff;
6631 };
6632
6633 Elf_Internal_Shdr *symtab_hdr;
6634 bfd_byte *contents = NULL;
6635 Elf_Internal_Sym *isymbuf = NULL;
6636 Elf_Internal_Rela *internal_relocs = NULL;
6637 Elf_Internal_Rela *irel, *irelend;
6638 struct one_fixup *fixups = NULL;
6639 unsigned changes = 0;
6640 struct ppc_elf_link_hash_table *htab;
6641 bfd_size_type trampoff;
6642 asection *got2;
6643 bfd_boolean maybe_pasted;
6644
6645 *again = FALSE;
6646
6647 /* Nothing to do if there are no relocations, and no need to do
6648 anything with non-alloc or non-code sections. */
6649 if ((isec->flags & SEC_ALLOC) == 0
6650 || (isec->flags & SEC_CODE) == 0
6651 || (isec->flags & SEC_RELOC) == 0
6652 || isec->reloc_count == 0)
6653 return TRUE;
6654
6655 /* We cannot represent the required PIC relocs in the output, so don't
6656 do anything. The linker doesn't support mixing -shared and -r
6657 anyway. */
6658 if (link_info->relocatable && link_info->shared)
6659 return TRUE;
6660
6661 trampoff = (isec->size + 3) & (bfd_vma) -4;
6662 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6663 || strcmp (isec->output_section->name, ".fini") == 0);
6664 /* Space for a branch around any trampolines. */
6665 if (maybe_pasted)
6666 trampoff += 4;
6667
6668 symtab_hdr = &elf_symtab_hdr (abfd);
6669
6670 /* Get a copy of the native relocations. */
6671 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6672 link_info->keep_memory);
6673 if (internal_relocs == NULL)
6674 goto error_return;
6675
6676 htab = ppc_elf_hash_table (link_info);
6677 got2 = bfd_get_section_by_name (abfd, ".got2");
6678
6679 irelend = internal_relocs + isec->reloc_count;
6680 for (irel = internal_relocs; irel < irelend; irel++)
6681 {
6682 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6683 bfd_vma toff, roff;
6684 asection *tsec;
6685 struct one_fixup *f;
6686 size_t insn_offset = 0;
6687 bfd_vma max_branch_offset, val;
6688 bfd_byte *hit_addr;
6689 unsigned long t0;
6690 struct elf_link_hash_entry *h;
6691 struct plt_entry **plist;
6692 unsigned char sym_type;
6693
6694 switch (r_type)
6695 {
6696 case R_PPC_REL24:
6697 case R_PPC_LOCAL24PC:
6698 case R_PPC_PLTREL24:
6699 max_branch_offset = 1 << 25;
6700 break;
6701
6702 case R_PPC_REL14:
6703 case R_PPC_REL14_BRTAKEN:
6704 case R_PPC_REL14_BRNTAKEN:
6705 max_branch_offset = 1 << 15;
6706 break;
6707
6708 default:
6709 continue;
6710 }
6711
6712 /* Get the value of the symbol referred to by the reloc. */
6713 h = NULL;
6714 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6715 {
6716 /* A local symbol. */
6717 Elf_Internal_Sym *isym;
6718
6719 /* Read this BFD's local symbols. */
6720 if (isymbuf == NULL)
6721 {
6722 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6723 if (isymbuf == NULL)
6724 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6725 symtab_hdr->sh_info, 0,
6726 NULL, NULL, NULL);
6727 if (isymbuf == 0)
6728 goto error_return;
6729 }
6730 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6731 if (isym->st_shndx == SHN_UNDEF)
6732 tsec = bfd_und_section_ptr;
6733 else if (isym->st_shndx == SHN_ABS)
6734 tsec = bfd_abs_section_ptr;
6735 else if (isym->st_shndx == SHN_COMMON)
6736 tsec = bfd_com_section_ptr;
6737 else
6738 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6739
6740 toff = isym->st_value;
6741 sym_type = ELF_ST_TYPE (isym->st_info);
6742 }
6743 else
6744 {
6745 /* Global symbol handling. */
6746 unsigned long indx;
6747
6748 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6749 h = elf_sym_hashes (abfd)[indx];
6750
6751 while (h->root.type == bfd_link_hash_indirect
6752 || h->root.type == bfd_link_hash_warning)
6753 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6754
6755 if (h->root.type == bfd_link_hash_defined
6756 || h->root.type == bfd_link_hash_defweak)
6757 {
6758 tsec = h->root.u.def.section;
6759 toff = h->root.u.def.value;
6760 }
6761 else if (h->root.type == bfd_link_hash_undefined
6762 || h->root.type == bfd_link_hash_undefweak)
6763 {
6764 tsec = bfd_und_section_ptr;
6765 toff = link_info->relocatable ? indx : 0;
6766 }
6767 else
6768 continue;
6769
6770 sym_type = h->type;
6771 }
6772
6773 /* The condition here under which we call find_plt_ent must
6774 match that in relocate_section. If we call find_plt_ent here
6775 but not in relocate_section, or vice versa, then the branch
6776 destination used here may be incorrect. */
6777 plist = NULL;
6778 if (h != NULL)
6779 {
6780 /* We know is_branch_reloc (r_type) is true. */
6781 if (h->type == STT_GNU_IFUNC
6782 || r_type == R_PPC_PLTREL24)
6783 plist = &h->plt.plist;
6784 }
6785 else if (sym_type == STT_GNU_IFUNC
6786 && elf_local_got_offsets (abfd) != NULL)
6787 {
6788 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6789 struct plt_entry **local_plt = (struct plt_entry **)
6790 (local_got_offsets + symtab_hdr->sh_info);
6791 plist = local_plt + ELF32_R_SYM (irel->r_info);
6792 }
6793 if (plist != NULL)
6794 {
6795 bfd_vma addend = 0;
6796 struct plt_entry *ent;
6797
6798 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6799 addend = irel->r_addend;
6800 ent = find_plt_ent (plist, got2, addend);
6801 if (ent != NULL)
6802 {
6803 if (htab->plt_type == PLT_NEW
6804 || h == NULL
6805 || !htab->elf.dynamic_sections_created
6806 || h->dynindx == -1)
6807 {
6808 tsec = htab->glink;
6809 toff = ent->glink_offset;
6810 }
6811 else
6812 {
6813 tsec = htab->plt;
6814 toff = ent->plt.offset;
6815 }
6816 }
6817 }
6818
6819 /* If the branch and target are in the same section, you have
6820 no hope of adding stubs. We'll error out later should the
6821 branch overflow. */
6822 if (tsec == isec)
6823 continue;
6824
6825 /* There probably isn't any reason to handle symbols in
6826 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6827 attribute for a code section, and we are only looking at
6828 branches. However, implement it correctly here as a
6829 reference for other target relax_section functions. */
6830 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6831 {
6832 /* At this stage in linking, no SEC_MERGE symbol has been
6833 adjusted, so all references to such symbols need to be
6834 passed through _bfd_merged_section_offset. (Later, in
6835 relocate_section, all SEC_MERGE symbols *except* for
6836 section symbols have been adjusted.)
6837
6838 gas may reduce relocations against symbols in SEC_MERGE
6839 sections to a relocation against the section symbol when
6840 the original addend was zero. When the reloc is against
6841 a section symbol we should include the addend in the
6842 offset passed to _bfd_merged_section_offset, since the
6843 location of interest is the original symbol. On the
6844 other hand, an access to "sym+addend" where "sym" is not
6845 a section symbol should not include the addend; Such an
6846 access is presumed to be an offset from "sym"; The
6847 location of interest is just "sym". */
6848 if (sym_type == STT_SECTION)
6849 toff += irel->r_addend;
6850
6851 toff = _bfd_merged_section_offset (abfd, &tsec,
6852 elf_section_data (tsec)->sec_info,
6853 toff);
6854
6855 if (sym_type != STT_SECTION)
6856 toff += irel->r_addend;
6857 }
6858 /* PLTREL24 addends are special. */
6859 else if (r_type != R_PPC_PLTREL24)
6860 toff += irel->r_addend;
6861
6862 /* Attempted -shared link of non-pic code loses. */
6863 if (tsec->output_section == NULL)
6864 continue;
6865
6866 roff = irel->r_offset;
6867
6868 /* If the branch is in range, no need to do anything. */
6869 if (tsec != bfd_und_section_ptr
6870 && (!link_info->relocatable
6871 /* A relocatable link may have sections moved during
6872 final link, so do not presume they remain in range. */
6873 || tsec->output_section == isec->output_section))
6874 {
6875 bfd_vma symaddr, reladdr;
6876
6877 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6878 reladdr = isec->output_section->vma + isec->output_offset + roff;
6879 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6880 continue;
6881 }
6882
6883 /* Look for an existing fixup to this address. */
6884 for (f = fixups; f ; f = f->next)
6885 if (f->tsec == tsec && f->toff == toff)
6886 break;
6887
6888 if (f == NULL)
6889 {
6890 size_t size;
6891 unsigned long stub_rtype;
6892
6893 val = trampoff - roff;
6894 if (val >= max_branch_offset)
6895 /* Oh dear, we can't reach a trampoline. Don't try to add
6896 one. We'll report an error later. */
6897 continue;
6898
6899 if (link_info->shared)
6900 {
6901 size = 4 * ARRAY_SIZE (shared_stub_entry);
6902 insn_offset = 12;
6903 }
6904 else
6905 {
6906 size = 4 * ARRAY_SIZE (stub_entry);
6907 insn_offset = 0;
6908 }
6909 stub_rtype = R_PPC_RELAX;
6910 if (tsec == htab->plt
6911 || tsec == htab->glink)
6912 {
6913 stub_rtype = R_PPC_RELAX_PLT;
6914 if (r_type == R_PPC_PLTREL24)
6915 stub_rtype = R_PPC_RELAX_PLTREL24;
6916 }
6917
6918 /* Hijack the old relocation. Since we need two
6919 relocations for this use a "composite" reloc. */
6920 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6921 stub_rtype);
6922 irel->r_offset = trampoff + insn_offset;
6923 if (r_type == R_PPC_PLTREL24
6924 && stub_rtype != R_PPC_RELAX_PLTREL24)
6925 irel->r_addend = 0;
6926
6927 /* Record the fixup so we don't do it again this section. */
6928 f = bfd_malloc (sizeof (*f));
6929 f->next = fixups;
6930 f->tsec = tsec;
6931 f->toff = toff;
6932 f->trampoff = trampoff;
6933 fixups = f;
6934
6935 trampoff += size;
6936 changes++;
6937 }
6938 else
6939 {
6940 val = f->trampoff - roff;
6941 if (val >= max_branch_offset)
6942 continue;
6943
6944 /* Nop out the reloc, since we're finalizing things here. */
6945 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6946 }
6947
6948 /* Get the section contents. */
6949 if (contents == NULL)
6950 {
6951 /* Get cached copy if it exists. */
6952 if (elf_section_data (isec)->this_hdr.contents != NULL)
6953 contents = elf_section_data (isec)->this_hdr.contents;
6954 else
6955 {
6956 /* Go get them off disk. */
6957 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6958 goto error_return;
6959 }
6960 }
6961
6962 /* Fix up the existing branch to hit the trampoline. */
6963 hit_addr = contents + roff;
6964 switch (r_type)
6965 {
6966 case R_PPC_REL24:
6967 case R_PPC_LOCAL24PC:
6968 case R_PPC_PLTREL24:
6969 t0 = bfd_get_32 (abfd, hit_addr);
6970 t0 &= ~0x3fffffc;
6971 t0 |= val & 0x3fffffc;
6972 bfd_put_32 (abfd, t0, hit_addr);
6973 break;
6974
6975 case R_PPC_REL14:
6976 case R_PPC_REL14_BRTAKEN:
6977 case R_PPC_REL14_BRNTAKEN:
6978 t0 = bfd_get_32 (abfd, hit_addr);
6979 t0 &= ~0xfffc;
6980 t0 |= val & 0xfffc;
6981 bfd_put_32 (abfd, t0, hit_addr);
6982 break;
6983 }
6984 }
6985
6986 /* Write out the trampolines. */
6987 if (fixups != NULL)
6988 {
6989 const int *stub;
6990 bfd_byte *dest;
6991 int i, size;
6992
6993 do
6994 {
6995 struct one_fixup *f = fixups;
6996 fixups = fixups->next;
6997 free (f);
6998 }
6999 while (fixups);
7000
7001 contents = bfd_realloc_or_free (contents, trampoff);
7002 if (contents == NULL)
7003 goto error_return;
7004
7005 isec->size = (isec->size + 3) & (bfd_vma) -4;
7006 dest = contents + isec->size;
7007 /* Branch around the trampolines. */
7008 if (maybe_pasted)
7009 {
7010 bfd_vma val = B + trampoff - isec->size;
7011 bfd_put_32 (abfd, val, dest);
7012 dest += 4;
7013 }
7014 isec->size = trampoff;
7015
7016 if (link_info->shared)
7017 {
7018 stub = shared_stub_entry;
7019 size = ARRAY_SIZE (shared_stub_entry);
7020 }
7021 else
7022 {
7023 stub = stub_entry;
7024 size = ARRAY_SIZE (stub_entry);
7025 }
7026
7027 i = 0;
7028 while (dest < contents + trampoff)
7029 {
7030 bfd_put_32 (abfd, stub[i], dest);
7031 i++;
7032 if (i == size)
7033 i = 0;
7034 dest += 4;
7035 }
7036 BFD_ASSERT (i == 0);
7037 }
7038
7039 if (isymbuf != NULL
7040 && symtab_hdr->contents != (unsigned char *) isymbuf)
7041 {
7042 if (! link_info->keep_memory)
7043 free (isymbuf);
7044 else
7045 {
7046 /* Cache the symbols for elf_link_input_bfd. */
7047 symtab_hdr->contents = (unsigned char *) isymbuf;
7048 }
7049 }
7050
7051 if (contents != NULL
7052 && elf_section_data (isec)->this_hdr.contents != contents)
7053 {
7054 if (!changes && !link_info->keep_memory)
7055 free (contents);
7056 else
7057 {
7058 /* Cache the section contents for elf_link_input_bfd. */
7059 elf_section_data (isec)->this_hdr.contents = contents;
7060 }
7061 }
7062
7063 if (changes != 0)
7064 {
7065 /* Append sufficient NOP relocs so we can write out relocation
7066 information for the trampolines. */
7067 Elf_Internal_Shdr *rel_hdr;
7068 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7069 * sizeof (*new_relocs));
7070 unsigned ix;
7071
7072 if (!new_relocs)
7073 goto error_return;
7074 memcpy (new_relocs, internal_relocs,
7075 isec->reloc_count * sizeof (*new_relocs));
7076 for (ix = changes; ix--;)
7077 {
7078 irel = new_relocs + ix + isec->reloc_count;
7079
7080 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7081 }
7082 if (internal_relocs != elf_section_data (isec)->relocs)
7083 free (internal_relocs);
7084 elf_section_data (isec)->relocs = new_relocs;
7085 isec->reloc_count += changes;
7086 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7087 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7088 }
7089 else if (elf_section_data (isec)->relocs != internal_relocs)
7090 free (internal_relocs);
7091
7092 *again = changes != 0;
7093 if (!*again && link_info->relocatable)
7094 {
7095 /* Convert the internal relax relocs to external form. */
7096 for (irel = internal_relocs; irel < irelend; irel++)
7097 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
7098 {
7099 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
7100
7101 /* Rewrite the reloc and convert one of the trailing nop
7102 relocs to describe this relocation. */
7103 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
7104 /* The relocs are at the bottom 2 bytes */
7105 irel[0].r_offset += 2;
7106 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
7107 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7108 irel[1].r_offset += 4;
7109 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7110 irel++;
7111 }
7112 }
7113
7114 return TRUE;
7115
7116 error_return:
7117 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7118 free (isymbuf);
7119 if (contents != NULL
7120 && elf_section_data (isec)->this_hdr.contents != contents)
7121 free (contents);
7122 if (internal_relocs != NULL
7123 && elf_section_data (isec)->relocs != internal_relocs)
7124 free (internal_relocs);
7125 return FALSE;
7126 }
7127 \f
7128 /* What to do when ld finds relocations against symbols defined in
7129 discarded sections. */
7130
7131 static unsigned int
7132 ppc_elf_action_discarded (asection *sec)
7133 {
7134 if (strcmp (".fixup", sec->name) == 0)
7135 return 0;
7136
7137 if (strcmp (".got2", sec->name) == 0)
7138 return 0;
7139
7140 return _bfd_elf_default_action_discarded (sec);
7141 }
7142 \f
7143 /* Fill in the address for a pointer generated in a linker section. */
7144
7145 static bfd_vma
7146 elf_finish_pointer_linker_section (bfd *input_bfd,
7147 elf_linker_section_t *lsect,
7148 struct elf_link_hash_entry *h,
7149 bfd_vma relocation,
7150 const Elf_Internal_Rela *rel)
7151 {
7152 elf_linker_section_pointers_t *linker_section_ptr;
7153
7154 BFD_ASSERT (lsect != NULL);
7155
7156 if (h != NULL)
7157 {
7158 /* Handle global symbol. */
7159 struct ppc_elf_link_hash_entry *eh;
7160
7161 eh = (struct ppc_elf_link_hash_entry *) h;
7162 BFD_ASSERT (eh->elf.def_regular);
7163 linker_section_ptr = eh->linker_section_pointer;
7164 }
7165 else
7166 {
7167 /* Handle local symbol. */
7168 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7169
7170 BFD_ASSERT (is_ppc_elf (input_bfd));
7171 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7172 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7173 }
7174
7175 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7176 rel->r_addend,
7177 lsect);
7178 BFD_ASSERT (linker_section_ptr != NULL);
7179
7180 /* Offset will always be a multiple of four, so use the bottom bit
7181 as a "written" flag. */
7182 if ((linker_section_ptr->offset & 1) == 0)
7183 {
7184 bfd_put_32 (lsect->section->owner,
7185 relocation + linker_section_ptr->addend,
7186 lsect->section->contents + linker_section_ptr->offset);
7187 linker_section_ptr->offset += 1;
7188 }
7189
7190 relocation = (lsect->section->output_section->vma
7191 + lsect->section->output_offset
7192 + linker_section_ptr->offset - 1
7193 - SYM_VAL (lsect->sym));
7194
7195 #ifdef DEBUG
7196 fprintf (stderr,
7197 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7198 lsect->name, (long) relocation, (long) relocation);
7199 #endif
7200
7201 return relocation;
7202 }
7203
7204 #define PPC_LO(v) ((v) & 0xffff)
7205 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7206 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7207
7208 static void
7209 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7210 struct bfd_link_info *info)
7211 {
7212 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7213 bfd *output_bfd = info->output_bfd;
7214 bfd_vma plt;
7215
7216 plt = ((ent->plt.offset & ~1)
7217 + plt_sec->output_section->vma
7218 + plt_sec->output_offset);
7219
7220 if (info->shared)
7221 {
7222 bfd_vma got = 0;
7223
7224 if (ent->addend >= 32768)
7225 got = (ent->addend
7226 + ent->sec->output_section->vma
7227 + ent->sec->output_offset);
7228 else if (htab->elf.hgot != NULL)
7229 got = SYM_VAL (htab->elf.hgot);
7230
7231 plt -= got;
7232
7233 if (plt + 0x8000 < 0x10000)
7234 {
7235 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7236 p += 4;
7237 bfd_put_32 (output_bfd, MTCTR_11, p);
7238 p += 4;
7239 bfd_put_32 (output_bfd, BCTR, p);
7240 p += 4;
7241 bfd_put_32 (output_bfd, NOP, p);
7242 p += 4;
7243 }
7244 else
7245 {
7246 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7247 p += 4;
7248 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7249 p += 4;
7250 bfd_put_32 (output_bfd, MTCTR_11, p);
7251 p += 4;
7252 bfd_put_32 (output_bfd, BCTR, p);
7253 p += 4;
7254 }
7255 }
7256 else
7257 {
7258 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7259 p += 4;
7260 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7261 p += 4;
7262 bfd_put_32 (output_bfd, MTCTR_11, p);
7263 p += 4;
7264 bfd_put_32 (output_bfd, BCTR, p);
7265 p += 4;
7266 }
7267 }
7268
7269 /* Return true if symbol is defined statically. */
7270
7271 static bfd_boolean
7272 is_static_defined (struct elf_link_hash_entry *h)
7273 {
7274 return ((h->root.type == bfd_link_hash_defined
7275 || h->root.type == bfd_link_hash_defweak)
7276 && h->root.u.def.section != NULL
7277 && h->root.u.def.section->output_section != NULL);
7278 }
7279
7280 /* If INSN is an opcode that may be used with an @tls operand, return
7281 the transformed insn for TLS optimisation, otherwise return 0. If
7282 REG is non-zero only match an insn with RB or RA equal to REG. */
7283
7284 unsigned int
7285 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7286 {
7287 unsigned int rtra;
7288
7289 if ((insn & (0x3f << 26)) != 31 << 26)
7290 return 0;
7291
7292 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7293 rtra = insn & ((1 << 26) - (1 << 16));
7294 else if (((insn >> 16) & 0x1f) == reg)
7295 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7296 else
7297 return 0;
7298
7299 if ((insn & (0x3ff << 1)) == 266 << 1)
7300 /* add -> addi. */
7301 insn = 14 << 26;
7302 else if ((insn & (0x1f << 1)) == 23 << 1
7303 && ((insn & (0x1f << 6)) < 14 << 6
7304 || ((insn & (0x1f << 6)) >= 16 << 6
7305 && (insn & (0x1f << 6)) < 24 << 6)))
7306 /* load and store indexed -> dform. */
7307 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7308 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7309 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7310 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7311 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7312 /* lwax -> lwa. */
7313 insn = (58 << 26) | 2;
7314 else
7315 return 0;
7316 insn |= rtra;
7317 return insn;
7318 }
7319
7320 /* If INSN is an opcode that may be used with an @tprel operand, return
7321 the transformed insn for an undefined weak symbol, ie. with the
7322 thread pointer REG operand removed. Otherwise return 0. */
7323
7324 unsigned int
7325 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7326 {
7327 if ((insn & (0x1f << 16)) == reg << 16
7328 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7329 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7330 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7331 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7332 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7333 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7334 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7335 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7336 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7337 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7338 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7339 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7340 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7341 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7342 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7343 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7344 && (insn & 3) != 1)
7345 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7346 && ((insn & 3) == 0 || (insn & 3) == 3))))
7347 {
7348 insn &= ~(0x1f << 16);
7349 }
7350 else if ((insn & (0x1f << 21)) == reg << 21
7351 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7352 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7353 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7354 {
7355 insn &= ~(0x1f << 21);
7356 insn |= (insn & (0x1f << 16)) << 5;
7357 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7358 insn -= 2 >> 26; /* convert to ori,oris */
7359 }
7360 else
7361 insn = 0;
7362 return insn;
7363 }
7364
7365 static bfd_boolean
7366 is_insn_ds_form (unsigned int insn)
7367 {
7368 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7369 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7370 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7371 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7372 }
7373
7374 static bfd_boolean
7375 is_insn_dq_form (unsigned int insn)
7376 {
7377 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7378 }
7379
7380 /* The RELOCATE_SECTION function is called by the ELF backend linker
7381 to handle the relocations for a section.
7382
7383 The relocs are always passed as Rela structures; if the section
7384 actually uses Rel structures, the r_addend field will always be
7385 zero.
7386
7387 This function is responsible for adjust the section contents as
7388 necessary, and (if using Rela relocs and generating a
7389 relocatable output file) adjusting the reloc addend as
7390 necessary.
7391
7392 This function does not have to worry about setting the reloc
7393 address or the reloc symbol index.
7394
7395 LOCAL_SYMS is a pointer to the swapped in local symbols.
7396
7397 LOCAL_SECTIONS is an array giving the section in the input file
7398 corresponding to the st_shndx field of each local symbol.
7399
7400 The global hash table entry for the global symbols can be found
7401 via elf_sym_hashes (input_bfd).
7402
7403 When generating relocatable output, this function must handle
7404 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7405 going to be the section symbol corresponding to the output
7406 section, which means that the addend must be adjusted
7407 accordingly. */
7408
7409 static bfd_boolean
7410 ppc_elf_relocate_section (bfd *output_bfd,
7411 struct bfd_link_info *info,
7412 bfd *input_bfd,
7413 asection *input_section,
7414 bfd_byte *contents,
7415 Elf_Internal_Rela *relocs,
7416 Elf_Internal_Sym *local_syms,
7417 asection **local_sections)
7418 {
7419 Elf_Internal_Shdr *symtab_hdr;
7420 struct elf_link_hash_entry **sym_hashes;
7421 struct ppc_elf_link_hash_table *htab;
7422 Elf_Internal_Rela *rel;
7423 Elf_Internal_Rela *relend;
7424 Elf_Internal_Rela outrel;
7425 asection *got2;
7426 bfd_vma *local_got_offsets;
7427 bfd_boolean ret = TRUE;
7428 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7429 bfd_boolean is_vxworks_tls;
7430
7431 #ifdef DEBUG
7432 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7433 "%ld relocations%s",
7434 input_bfd, input_section,
7435 (long) input_section->reloc_count,
7436 (info->relocatable) ? " (relocatable)" : "");
7437 #endif
7438
7439 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7440
7441 /* Initialize howto table if not already done. */
7442 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7443 ppc_elf_howto_init ();
7444
7445 htab = ppc_elf_hash_table (info);
7446 local_got_offsets = elf_local_got_offsets (input_bfd);
7447 symtab_hdr = &elf_symtab_hdr (input_bfd);
7448 sym_hashes = elf_sym_hashes (input_bfd);
7449 /* We have to handle relocations in vxworks .tls_vars sections
7450 specially, because the dynamic loader is 'weird'. */
7451 is_vxworks_tls = (htab->is_vxworks && info->shared
7452 && !strcmp (input_section->output_section->name,
7453 ".tls_vars"));
7454 rel = relocs;
7455 relend = relocs + input_section->reloc_count;
7456 for (; rel < relend; rel++)
7457 {
7458 enum elf_ppc_reloc_type r_type;
7459 bfd_vma addend;
7460 bfd_reloc_status_type r;
7461 Elf_Internal_Sym *sym;
7462 asection *sec;
7463 struct elf_link_hash_entry *h;
7464 const char *sym_name;
7465 reloc_howto_type *howto;
7466 unsigned long r_symndx;
7467 bfd_vma relocation;
7468 bfd_vma branch_bit, from;
7469 bfd_boolean unresolved_reloc;
7470 bfd_boolean warned;
7471 unsigned int tls_type, tls_mask, tls_gd;
7472 struct plt_entry **ifunc;
7473
7474 r_type = ELF32_R_TYPE (rel->r_info);
7475 sym = NULL;
7476 sec = NULL;
7477 h = NULL;
7478 unresolved_reloc = FALSE;
7479 warned = FALSE;
7480 r_symndx = ELF32_R_SYM (rel->r_info);
7481
7482 if (r_symndx < symtab_hdr->sh_info)
7483 {
7484 sym = local_syms + r_symndx;
7485 sec = local_sections[r_symndx];
7486 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7487
7488 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7489 }
7490 else
7491 {
7492 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7493 r_symndx, symtab_hdr, sym_hashes,
7494 h, sec, relocation,
7495 unresolved_reloc, warned);
7496
7497 sym_name = h->root.root.string;
7498 }
7499
7500 if (sec != NULL && discarded_section (sec))
7501 {
7502 /* For relocs against symbols from removed linkonce sections,
7503 or sections discarded by a linker script, we just want the
7504 section contents zeroed. Avoid any special processing. */
7505 howto = NULL;
7506 if (r_type < R_PPC_max)
7507 howto = ppc_elf_howto_table[r_type];
7508 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7509 rel, 1, relend, howto, 0, contents);
7510 }
7511
7512 if (info->relocatable)
7513 {
7514 if (got2 != NULL
7515 && r_type == R_PPC_PLTREL24
7516 && rel->r_addend != 0)
7517 {
7518 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7519 addend specifies the GOT pointer offset within .got2. */
7520 rel->r_addend += got2->output_offset;
7521 }
7522 continue;
7523 }
7524
7525 /* TLS optimizations. Replace instruction sequences and relocs
7526 based on information we collected in tls_optimize. We edit
7527 RELOCS so that --emit-relocs will output something sensible
7528 for the final instruction stream. */
7529 tls_mask = 0;
7530 tls_gd = 0;
7531 if (h != NULL)
7532 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7533 else if (local_got_offsets != NULL)
7534 {
7535 struct plt_entry **local_plt;
7536 char *lgot_masks;
7537 local_plt
7538 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7539 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7540 tls_mask = lgot_masks[r_symndx];
7541 }
7542
7543 /* Ensure reloc mapping code below stays sane. */
7544 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7545 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7546 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7547 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7548 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7549 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7550 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7551 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7552 abort ();
7553 switch (r_type)
7554 {
7555 default:
7556 break;
7557
7558 case R_PPC_GOT_TPREL16:
7559 case R_PPC_GOT_TPREL16_LO:
7560 if ((tls_mask & TLS_TLS) != 0
7561 && (tls_mask & TLS_TPREL) == 0)
7562 {
7563 bfd_vma insn;
7564
7565 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7566 insn &= 31 << 21;
7567 insn |= 0x3c020000; /* addis 0,2,0 */
7568 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7569 r_type = R_PPC_TPREL16_HA;
7570 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7571 }
7572 break;
7573
7574 case R_PPC_TLS:
7575 if ((tls_mask & TLS_TLS) != 0
7576 && (tls_mask & TLS_TPREL) == 0)
7577 {
7578 bfd_vma insn;
7579
7580 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7581 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7582 if (insn == 0)
7583 abort ();
7584 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7585 r_type = R_PPC_TPREL16_LO;
7586 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7587
7588 /* Was PPC_TLS which sits on insn boundary, now
7589 PPC_TPREL16_LO which is at low-order half-word. */
7590 rel->r_offset += d_offset;
7591 }
7592 break;
7593
7594 case R_PPC_GOT_TLSGD16_HI:
7595 case R_PPC_GOT_TLSGD16_HA:
7596 tls_gd = TLS_TPRELGD;
7597 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7598 goto tls_gdld_hi;
7599 break;
7600
7601 case R_PPC_GOT_TLSLD16_HI:
7602 case R_PPC_GOT_TLSLD16_HA:
7603 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7604 {
7605 tls_gdld_hi:
7606 if ((tls_mask & tls_gd) != 0)
7607 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7608 + R_PPC_GOT_TPREL16);
7609 else
7610 {
7611 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7612 rel->r_offset -= d_offset;
7613 r_type = R_PPC_NONE;
7614 }
7615 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7616 }
7617 break;
7618
7619 case R_PPC_GOT_TLSGD16:
7620 case R_PPC_GOT_TLSGD16_LO:
7621 tls_gd = TLS_TPRELGD;
7622 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7623 goto tls_ldgd_opt;
7624 break;
7625
7626 case R_PPC_GOT_TLSLD16:
7627 case R_PPC_GOT_TLSLD16_LO:
7628 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7629 {
7630 unsigned int insn1, insn2;
7631 bfd_vma offset;
7632
7633 tls_ldgd_opt:
7634 offset = (bfd_vma) -1;
7635 /* If not using the newer R_PPC_TLSGD/LD to mark
7636 __tls_get_addr calls, we must trust that the call
7637 stays with its arg setup insns, ie. that the next
7638 reloc is the __tls_get_addr call associated with
7639 the current reloc. Edit both insns. */
7640 if (input_section->has_tls_get_addr_call
7641 && rel + 1 < relend
7642 && branch_reloc_hash_match (input_bfd, rel + 1,
7643 htab->tls_get_addr))
7644 offset = rel[1].r_offset;
7645 if ((tls_mask & tls_gd) != 0)
7646 {
7647 /* IE */
7648 insn1 = bfd_get_32 (output_bfd,
7649 contents + rel->r_offset - d_offset);
7650 insn1 &= (1 << 26) - 1;
7651 insn1 |= 32 << 26; /* lwz */
7652 if (offset != (bfd_vma) -1)
7653 {
7654 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7655 insn2 = 0x7c631214; /* add 3,3,2 */
7656 bfd_put_32 (output_bfd, insn2, contents + offset);
7657 }
7658 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7659 + R_PPC_GOT_TPREL16);
7660 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7661 }
7662 else
7663 {
7664 /* LE */
7665 insn1 = 0x3c620000; /* addis 3,2,0 */
7666 if (tls_gd == 0)
7667 {
7668 /* Was an LD reloc. */
7669 for (r_symndx = 0;
7670 r_symndx < symtab_hdr->sh_info;
7671 r_symndx++)
7672 if (local_sections[r_symndx] == sec)
7673 break;
7674 if (r_symndx >= symtab_hdr->sh_info)
7675 r_symndx = STN_UNDEF;
7676 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7677 if (r_symndx != STN_UNDEF)
7678 rel->r_addend -= (local_syms[r_symndx].st_value
7679 + sec->output_offset
7680 + sec->output_section->vma);
7681 }
7682 r_type = R_PPC_TPREL16_HA;
7683 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7684 if (offset != (bfd_vma) -1)
7685 {
7686 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7687 rel[1].r_offset = offset + d_offset;
7688 rel[1].r_addend = rel->r_addend;
7689 insn2 = 0x38630000; /* addi 3,3,0 */
7690 bfd_put_32 (output_bfd, insn2, contents + offset);
7691 }
7692 }
7693 bfd_put_32 (output_bfd, insn1,
7694 contents + rel->r_offset - d_offset);
7695 if (tls_gd == 0)
7696 {
7697 /* We changed the symbol on an LD reloc. Start over
7698 in order to get h, sym, sec etc. right. */
7699 rel--;
7700 continue;
7701 }
7702 }
7703 break;
7704
7705 case R_PPC_TLSGD:
7706 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7707 {
7708 unsigned int insn2;
7709 bfd_vma offset = rel->r_offset;
7710
7711 if ((tls_mask & TLS_TPRELGD) != 0)
7712 {
7713 /* IE */
7714 r_type = R_PPC_NONE;
7715 insn2 = 0x7c631214; /* add 3,3,2 */
7716 }
7717 else
7718 {
7719 /* LE */
7720 r_type = R_PPC_TPREL16_LO;
7721 rel->r_offset += d_offset;
7722 insn2 = 0x38630000; /* addi 3,3,0 */
7723 }
7724 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7725 bfd_put_32 (output_bfd, insn2, contents + offset);
7726 /* Zap the reloc on the _tls_get_addr call too. */
7727 BFD_ASSERT (offset == rel[1].r_offset);
7728 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7729 }
7730 break;
7731
7732 case R_PPC_TLSLD:
7733 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7734 {
7735 unsigned int insn2;
7736
7737 for (r_symndx = 0;
7738 r_symndx < symtab_hdr->sh_info;
7739 r_symndx++)
7740 if (local_sections[r_symndx] == sec)
7741 break;
7742 if (r_symndx >= symtab_hdr->sh_info)
7743 r_symndx = STN_UNDEF;
7744 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7745 if (r_symndx != STN_UNDEF)
7746 rel->r_addend -= (local_syms[r_symndx].st_value
7747 + sec->output_offset
7748 + sec->output_section->vma);
7749
7750 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7751 rel->r_offset += d_offset;
7752 insn2 = 0x38630000; /* addi 3,3,0 */
7753 bfd_put_32 (output_bfd, insn2,
7754 contents + rel->r_offset - d_offset);
7755 /* Zap the reloc on the _tls_get_addr call too. */
7756 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7757 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7758 rel--;
7759 continue;
7760 }
7761 break;
7762 }
7763
7764 /* Handle other relocations that tweak non-addend part of insn. */
7765 branch_bit = 0;
7766 switch (r_type)
7767 {
7768 default:
7769 break;
7770
7771 /* Branch taken prediction relocations. */
7772 case R_PPC_ADDR14_BRTAKEN:
7773 case R_PPC_REL14_BRTAKEN:
7774 branch_bit = BRANCH_PREDICT_BIT;
7775 /* Fall thru */
7776
7777 /* Branch not taken prediction relocations. */
7778 case R_PPC_ADDR14_BRNTAKEN:
7779 case R_PPC_REL14_BRNTAKEN:
7780 {
7781 bfd_vma insn;
7782
7783 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7784 insn &= ~BRANCH_PREDICT_BIT;
7785 insn |= branch_bit;
7786
7787 from = (rel->r_offset
7788 + input_section->output_offset
7789 + input_section->output_section->vma);
7790
7791 /* Invert 'y' bit if not the default. */
7792 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7793 insn ^= BRANCH_PREDICT_BIT;
7794
7795 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7796 break;
7797 }
7798 }
7799
7800 ifunc = NULL;
7801 if (!htab->is_vxworks)
7802 {
7803 struct plt_entry *ent;
7804
7805 if (h != NULL)
7806 {
7807 if (h->type == STT_GNU_IFUNC)
7808 ifunc = &h->plt.plist;
7809 }
7810 else if (local_got_offsets != NULL
7811 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7812 {
7813 struct plt_entry **local_plt;
7814
7815 local_plt = (struct plt_entry **) (local_got_offsets
7816 + symtab_hdr->sh_info);
7817 ifunc = local_plt + r_symndx;
7818 }
7819
7820 ent = NULL;
7821 if (ifunc != NULL
7822 && (!info->shared
7823 || is_branch_reloc (r_type)))
7824 {
7825 addend = 0;
7826 if (r_type == R_PPC_PLTREL24 && info->shared)
7827 addend = rel->r_addend;
7828 ent = find_plt_ent (ifunc, got2, addend);
7829 }
7830 if (ent != NULL)
7831 {
7832 if (h == NULL && (ent->plt.offset & 1) == 0)
7833 {
7834 Elf_Internal_Rela rela;
7835 bfd_byte *loc;
7836
7837 rela.r_offset = (htab->iplt->output_section->vma
7838 + htab->iplt->output_offset
7839 + ent->plt.offset);
7840 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7841 rela.r_addend = relocation;
7842 loc = htab->reliplt->contents;
7843 loc += (htab->reliplt->reloc_count++
7844 * sizeof (Elf32_External_Rela));
7845 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7846
7847 ent->plt.offset |= 1;
7848 }
7849 if (h == NULL && (ent->glink_offset & 1) == 0)
7850 {
7851 unsigned char *p = ((unsigned char *) htab->glink->contents
7852 + ent->glink_offset);
7853 write_glink_stub (ent, htab->iplt, p, info);
7854 ent->glink_offset |= 1;
7855 }
7856
7857 unresolved_reloc = FALSE;
7858 if (htab->plt_type == PLT_NEW
7859 || !htab->elf.dynamic_sections_created
7860 || h == NULL)
7861 relocation = (htab->glink->output_section->vma
7862 + htab->glink->output_offset
7863 + (ent->glink_offset & ~1));
7864 else
7865 relocation = (htab->plt->output_section->vma
7866 + htab->plt->output_offset
7867 + ent->plt.offset);
7868 }
7869 }
7870
7871 addend = rel->r_addend;
7872 tls_type = 0;
7873 howto = NULL;
7874 if (r_type < R_PPC_max)
7875 howto = ppc_elf_howto_table[r_type];
7876 switch (r_type)
7877 {
7878 default:
7879 info->callbacks->einfo
7880 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
7881 input_bfd, (int) r_type, sym_name);
7882
7883 bfd_set_error (bfd_error_bad_value);
7884 ret = FALSE;
7885 continue;
7886
7887 case R_PPC_NONE:
7888 case R_PPC_TLS:
7889 case R_PPC_TLSGD:
7890 case R_PPC_TLSLD:
7891 case R_PPC_EMB_MRKREF:
7892 case R_PPC_GNU_VTINHERIT:
7893 case R_PPC_GNU_VTENTRY:
7894 continue;
7895
7896 /* GOT16 relocations. Like an ADDR16 using the symbol's
7897 address in the GOT as relocation value instead of the
7898 symbol's value itself. Also, create a GOT entry for the
7899 symbol and put the symbol value there. */
7900 case R_PPC_GOT_TLSGD16:
7901 case R_PPC_GOT_TLSGD16_LO:
7902 case R_PPC_GOT_TLSGD16_HI:
7903 case R_PPC_GOT_TLSGD16_HA:
7904 tls_type = TLS_TLS | TLS_GD;
7905 goto dogot;
7906
7907 case R_PPC_GOT_TLSLD16:
7908 case R_PPC_GOT_TLSLD16_LO:
7909 case R_PPC_GOT_TLSLD16_HI:
7910 case R_PPC_GOT_TLSLD16_HA:
7911 tls_type = TLS_TLS | TLS_LD;
7912 goto dogot;
7913
7914 case R_PPC_GOT_TPREL16:
7915 case R_PPC_GOT_TPREL16_LO:
7916 case R_PPC_GOT_TPREL16_HI:
7917 case R_PPC_GOT_TPREL16_HA:
7918 tls_type = TLS_TLS | TLS_TPREL;
7919 goto dogot;
7920
7921 case R_PPC_GOT_DTPREL16:
7922 case R_PPC_GOT_DTPREL16_LO:
7923 case R_PPC_GOT_DTPREL16_HI:
7924 case R_PPC_GOT_DTPREL16_HA:
7925 tls_type = TLS_TLS | TLS_DTPREL;
7926 goto dogot;
7927
7928 case R_PPC_GOT16:
7929 case R_PPC_GOT16_LO:
7930 case R_PPC_GOT16_HI:
7931 case R_PPC_GOT16_HA:
7932 tls_mask = 0;
7933 dogot:
7934 {
7935 /* Relocation is to the entry for this symbol in the global
7936 offset table. */
7937 bfd_vma off;
7938 bfd_vma *offp;
7939 unsigned long indx;
7940
7941 if (htab->got == NULL)
7942 abort ();
7943
7944 indx = 0;
7945 if (tls_type == (TLS_TLS | TLS_LD)
7946 && (h == NULL
7947 || !h->def_dynamic))
7948 offp = &htab->tlsld_got.offset;
7949 else if (h != NULL)
7950 {
7951 bfd_boolean dyn;
7952 dyn = htab->elf.dynamic_sections_created;
7953 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7954 || (info->shared
7955 && SYMBOL_REFERENCES_LOCAL (info, h)))
7956 /* This is actually a static link, or it is a
7957 -Bsymbolic link and the symbol is defined
7958 locally, or the symbol was forced to be local
7959 because of a version file. */
7960 ;
7961 else
7962 {
7963 BFD_ASSERT (h->dynindx != -1);
7964 indx = h->dynindx;
7965 unresolved_reloc = FALSE;
7966 }
7967 offp = &h->got.offset;
7968 }
7969 else
7970 {
7971 if (local_got_offsets == NULL)
7972 abort ();
7973 offp = &local_got_offsets[r_symndx];
7974 }
7975
7976 /* The offset must always be a multiple of 4. We use the
7977 least significant bit to record whether we have already
7978 processed this entry. */
7979 off = *offp;
7980 if ((off & 1) != 0)
7981 off &= ~1;
7982 else
7983 {
7984 unsigned int tls_m = (tls_mask
7985 & (TLS_LD | TLS_GD | TLS_DTPREL
7986 | TLS_TPREL | TLS_TPRELGD));
7987
7988 if (offp == &htab->tlsld_got.offset)
7989 tls_m = TLS_LD;
7990 else if (h == NULL
7991 || !h->def_dynamic)
7992 tls_m &= ~TLS_LD;
7993
7994 /* We might have multiple got entries for this sym.
7995 Initialize them all. */
7996 do
7997 {
7998 int tls_ty = 0;
7999
8000 if ((tls_m & TLS_LD) != 0)
8001 {
8002 tls_ty = TLS_TLS | TLS_LD;
8003 tls_m &= ~TLS_LD;
8004 }
8005 else if ((tls_m & TLS_GD) != 0)
8006 {
8007 tls_ty = TLS_TLS | TLS_GD;
8008 tls_m &= ~TLS_GD;
8009 }
8010 else if ((tls_m & TLS_DTPREL) != 0)
8011 {
8012 tls_ty = TLS_TLS | TLS_DTPREL;
8013 tls_m &= ~TLS_DTPREL;
8014 }
8015 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8016 {
8017 tls_ty = TLS_TLS | TLS_TPREL;
8018 tls_m = 0;
8019 }
8020
8021 /* Generate relocs for the dynamic linker. */
8022 if ((info->shared || indx != 0)
8023 && (offp == &htab->tlsld_got.offset
8024 || h == NULL
8025 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8026 || h->root.type != bfd_link_hash_undefweak))
8027 {
8028 asection *rsec = htab->relgot;
8029 bfd_byte * loc;
8030
8031 if (ifunc != NULL)
8032 rsec = htab->reliplt;
8033 outrel.r_offset = (htab->got->output_section->vma
8034 + htab->got->output_offset
8035 + off);
8036 outrel.r_addend = 0;
8037 if (tls_ty & (TLS_LD | TLS_GD))
8038 {
8039 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8040 if (tls_ty == (TLS_TLS | TLS_GD))
8041 {
8042 loc = rsec->contents;
8043 loc += (rsec->reloc_count++
8044 * sizeof (Elf32_External_Rela));
8045 bfd_elf32_swap_reloca_out (output_bfd,
8046 &outrel, loc);
8047 outrel.r_offset += 4;
8048 outrel.r_info
8049 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8050 }
8051 }
8052 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8053 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8054 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8055 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8056 else if (indx != 0)
8057 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8058 else if (ifunc != NULL)
8059 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8060 else
8061 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8062 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8063 {
8064 outrel.r_addend += relocation;
8065 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8066 outrel.r_addend -= htab->elf.tls_sec->vma;
8067 }
8068 loc = rsec->contents;
8069 loc += (rsec->reloc_count++
8070 * sizeof (Elf32_External_Rela));
8071 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8072 }
8073
8074 /* Init the .got section contents if we're not
8075 emitting a reloc. */
8076 else
8077 {
8078 bfd_vma value = relocation;
8079
8080 if (tls_ty == (TLS_TLS | TLS_LD))
8081 value = 1;
8082 else if (tls_ty != 0)
8083 {
8084 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8085 if (tls_ty == (TLS_TLS | TLS_TPREL))
8086 value += DTP_OFFSET - TP_OFFSET;
8087
8088 if (tls_ty == (TLS_TLS | TLS_GD))
8089 {
8090 bfd_put_32 (output_bfd, value,
8091 htab->got->contents + off + 4);
8092 value = 1;
8093 }
8094 }
8095 bfd_put_32 (output_bfd, value,
8096 htab->got->contents + off);
8097 }
8098
8099 off += 4;
8100 if (tls_ty & (TLS_LD | TLS_GD))
8101 off += 4;
8102 }
8103 while (tls_m != 0);
8104
8105 off = *offp;
8106 *offp = off | 1;
8107 }
8108
8109 if (off >= (bfd_vma) -2)
8110 abort ();
8111
8112 if ((tls_type & TLS_TLS) != 0)
8113 {
8114 if (tls_type != (TLS_TLS | TLS_LD))
8115 {
8116 if ((tls_mask & TLS_LD) != 0
8117 && !(h == NULL
8118 || !h->def_dynamic))
8119 off += 8;
8120 if (tls_type != (TLS_TLS | TLS_GD))
8121 {
8122 if ((tls_mask & TLS_GD) != 0)
8123 off += 8;
8124 if (tls_type != (TLS_TLS | TLS_DTPREL))
8125 {
8126 if ((tls_mask & TLS_DTPREL) != 0)
8127 off += 4;
8128 }
8129 }
8130 }
8131 }
8132
8133 relocation = (htab->got->output_section->vma
8134 + htab->got->output_offset
8135 + off
8136 - SYM_VAL (htab->elf.hgot));
8137
8138 /* Addends on got relocations don't make much sense.
8139 x+off@got is actually x@got+off, and since the got is
8140 generated by a hash table traversal, the value in the
8141 got at entry m+n bears little relation to the entry m. */
8142 if (addend != 0)
8143 info->callbacks->einfo
8144 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8145 input_bfd, input_section, rel->r_offset,
8146 howto->name,
8147 sym_name);
8148 }
8149 break;
8150
8151 /* Relocations that need no special processing. */
8152 case R_PPC_LOCAL24PC:
8153 /* It makes no sense to point a local relocation
8154 at a symbol not in this object. */
8155 if (unresolved_reloc)
8156 {
8157 if (! (*info->callbacks->undefined_symbol) (info,
8158 h->root.root.string,
8159 input_bfd,
8160 input_section,
8161 rel->r_offset,
8162 TRUE))
8163 return FALSE;
8164 continue;
8165 }
8166 break;
8167
8168 case R_PPC_DTPREL16:
8169 case R_PPC_DTPREL16_LO:
8170 case R_PPC_DTPREL16_HI:
8171 case R_PPC_DTPREL16_HA:
8172 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8173 break;
8174
8175 /* Relocations that may need to be propagated if this is a shared
8176 object. */
8177 case R_PPC_TPREL16:
8178 case R_PPC_TPREL16_LO:
8179 case R_PPC_TPREL16_HI:
8180 case R_PPC_TPREL16_HA:
8181 if (h != NULL
8182 && h->root.type == bfd_link_hash_undefweak
8183 && h->dynindx == -1)
8184 {
8185 /* Make this relocation against an undefined weak symbol
8186 resolve to zero. This is really just a tweak, since
8187 code using weak externs ought to check that they are
8188 defined before using them. */
8189 bfd_byte *p = contents + rel->r_offset - d_offset;
8190 unsigned int insn = bfd_get_32 (output_bfd, p);
8191 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8192 if (insn != 0)
8193 bfd_put_32 (output_bfd, insn, p);
8194 break;
8195 }
8196 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8197 /* The TPREL16 relocs shouldn't really be used in shared
8198 libs as they will result in DT_TEXTREL being set, but
8199 support them anyway. */
8200 goto dodyn;
8201
8202 case R_PPC_TPREL32:
8203 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8204 goto dodyn;
8205
8206 case R_PPC_DTPREL32:
8207 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8208 goto dodyn;
8209
8210 case R_PPC_DTPMOD32:
8211 relocation = 1;
8212 addend = 0;
8213 goto dodyn;
8214
8215 case R_PPC_REL16:
8216 case R_PPC_REL16_LO:
8217 case R_PPC_REL16_HI:
8218 case R_PPC_REL16_HA:
8219 break;
8220
8221 case R_PPC_REL32:
8222 if (h == NULL || h == htab->elf.hgot)
8223 break;
8224 /* fall through */
8225
8226 case R_PPC_ADDR32:
8227 case R_PPC_ADDR16:
8228 case R_PPC_ADDR16_LO:
8229 case R_PPC_ADDR16_HI:
8230 case R_PPC_ADDR16_HA:
8231 case R_PPC_UADDR32:
8232 case R_PPC_UADDR16:
8233 goto dodyn;
8234
8235 case R_PPC_VLE_REL8:
8236 case R_PPC_VLE_REL15:
8237 case R_PPC_VLE_REL24:
8238 case R_PPC_REL24:
8239 case R_PPC_REL14:
8240 case R_PPC_REL14_BRTAKEN:
8241 case R_PPC_REL14_BRNTAKEN:
8242 /* If these relocations are not to a named symbol, they can be
8243 handled right here, no need to bother the dynamic linker. */
8244 if (SYMBOL_CALLS_LOCAL (info, h)
8245 || h == htab->elf.hgot)
8246 break;
8247 /* fall through */
8248
8249 case R_PPC_ADDR24:
8250 case R_PPC_ADDR14:
8251 case R_PPC_ADDR14_BRTAKEN:
8252 case R_PPC_ADDR14_BRNTAKEN:
8253 if (h != NULL && !info->shared)
8254 break;
8255 /* fall through */
8256
8257 dodyn:
8258 if ((input_section->flags & SEC_ALLOC) == 0
8259 || is_vxworks_tls)
8260 break;
8261
8262 if ((info->shared
8263 && !(h != NULL
8264 && ((h->root.type == bfd_link_hash_undefined
8265 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8266 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8267 || (h->root.type == bfd_link_hash_undefweak
8268 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8269 && (must_be_dyn_reloc (info, r_type)
8270 || !SYMBOL_CALLS_LOCAL (info, h)))
8271 || (ELIMINATE_COPY_RELOCS
8272 && !info->shared
8273 && h != NULL
8274 && h->dynindx != -1
8275 && !h->non_got_ref
8276 && !h->def_regular))
8277 {
8278 int skip;
8279 bfd_byte *loc;
8280 asection *sreloc;
8281 #ifdef DEBUG
8282 fprintf (stderr, "ppc_elf_relocate_section needs to "
8283 "create relocation for %s\n",
8284 (h && h->root.root.string
8285 ? h->root.root.string : "<unknown>"));
8286 #endif
8287
8288 /* When generating a shared object, these relocations
8289 are copied into the output file to be resolved at run
8290 time. */
8291 sreloc = elf_section_data (input_section)->sreloc;
8292 if (ifunc)
8293 sreloc = htab->reliplt;
8294 if (sreloc == NULL)
8295 return FALSE;
8296
8297 skip = 0;
8298 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8299 input_section,
8300 rel->r_offset);
8301 if (outrel.r_offset == (bfd_vma) -1
8302 || outrel.r_offset == (bfd_vma) -2)
8303 skip = (int) outrel.r_offset;
8304 outrel.r_offset += (input_section->output_section->vma
8305 + input_section->output_offset);
8306
8307 if (skip)
8308 memset (&outrel, 0, sizeof outrel);
8309 else if ((h != NULL
8310 && (h->root.type == bfd_link_hash_undefined
8311 || h->root.type == bfd_link_hash_undefweak))
8312 || !SYMBOL_REFERENCES_LOCAL (info, h))
8313 {
8314 BFD_ASSERT (h->dynindx != -1);
8315 unresolved_reloc = FALSE;
8316 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8317 outrel.r_addend = rel->r_addend;
8318 }
8319 else
8320 {
8321 outrel.r_addend = relocation + rel->r_addend;
8322
8323 if (r_type != R_PPC_ADDR32)
8324 {
8325 long indx = 0;
8326
8327 if (ifunc != NULL)
8328 {
8329 /* If we get here when building a static
8330 executable, then the libc startup function
8331 responsible for applying indirect function
8332 relocations is going to complain about
8333 the reloc type.
8334 If we get here when building a dynamic
8335 executable, it will be because we have
8336 a text relocation. The dynamic loader
8337 will set the text segment writable and
8338 non-executable to apply text relocations.
8339 So we'll segfault when trying to run the
8340 indirection function to resolve the reloc. */
8341 info->callbacks->einfo
8342 (_("%P: %H: relocation %s for indirect "
8343 "function %s unsupported\n"),
8344 input_bfd, input_section, rel->r_offset,
8345 howto->name,
8346 sym_name);
8347 ret = FALSE;
8348 }
8349 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8350 ;
8351 else if (sec == NULL || sec->owner == NULL)
8352 {
8353 bfd_set_error (bfd_error_bad_value);
8354 ret = FALSE;
8355 }
8356 else
8357 {
8358 asection *osec;
8359
8360 /* We are turning this relocation into one
8361 against a section symbol. It would be
8362 proper to subtract the symbol's value,
8363 osec->vma, from the emitted reloc addend,
8364 but ld.so expects buggy relocs.
8365 FIXME: Why not always use a zero index? */
8366 osec = sec->output_section;
8367 indx = elf_section_data (osec)->dynindx;
8368 if (indx == 0)
8369 {
8370 osec = htab->elf.text_index_section;
8371 indx = elf_section_data (osec)->dynindx;
8372 }
8373 BFD_ASSERT (indx != 0);
8374 #ifdef DEBUG
8375 if (indx == 0)
8376 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8377 indx, osec->name, osec->flags,
8378 h->root.root.string);
8379 #endif
8380 }
8381
8382 outrel.r_info = ELF32_R_INFO (indx, r_type);
8383 }
8384 else if (ifunc != NULL)
8385 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8386 else
8387 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8388 }
8389
8390 loc = sreloc->contents;
8391 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8392 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8393
8394 if (skip == -1)
8395 continue;
8396
8397 /* This reloc will be computed at runtime. We clear the memory
8398 so that it contains predictable value. */
8399 if (! skip
8400 && ((input_section->flags & SEC_ALLOC) != 0
8401 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8402 {
8403 relocation = howto->pc_relative ? outrel.r_offset : 0;
8404 addend = 0;
8405 break;
8406 }
8407 }
8408 break;
8409
8410 case R_PPC_RELAX_PLT:
8411 case R_PPC_RELAX_PLTREL24:
8412 if (h != NULL)
8413 {
8414 struct plt_entry *ent;
8415 bfd_vma got2_addend = 0;
8416
8417 if (r_type == R_PPC_RELAX_PLTREL24)
8418 {
8419 if (info->shared)
8420 got2_addend = addend;
8421 addend = 0;
8422 }
8423 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8424 if (htab->plt_type == PLT_NEW)
8425 relocation = (htab->glink->output_section->vma
8426 + htab->glink->output_offset
8427 + ent->glink_offset);
8428 else
8429 relocation = (htab->plt->output_section->vma
8430 + htab->plt->output_offset
8431 + ent->plt.offset);
8432 }
8433 /* Fall thru */
8434
8435 case R_PPC_RELAX:
8436 if (info->shared)
8437 relocation -= (input_section->output_section->vma
8438 + input_section->output_offset
8439 + rel->r_offset - 4);
8440
8441 {
8442 unsigned long t0;
8443 unsigned long t1;
8444
8445 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
8446 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
8447
8448 /* We're clearing the bits for R_PPC_ADDR16_HA
8449 and R_PPC_ADDR16_LO here. */
8450 t0 &= ~0xffff;
8451 t1 &= ~0xffff;
8452
8453 /* t0 is HA, t1 is LO */
8454 relocation += addend;
8455 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
8456 t1 |= relocation & 0xffff;
8457
8458 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
8459 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
8460
8461 /* Rewrite the reloc and convert one of the trailing nop
8462 relocs to describe this relocation. */
8463 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8464 /* The relocs are at the bottom 2 bytes */
8465 rel[0].r_offset += 2;
8466 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8467 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8468 rel[1].r_offset += 4;
8469 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8470 rel++;
8471 }
8472 continue;
8473
8474 /* Indirect .sdata relocation. */
8475 case R_PPC_EMB_SDAI16:
8476 BFD_ASSERT (htab->sdata[0].section != NULL);
8477 if (!is_static_defined (htab->sdata[0].sym))
8478 {
8479 unresolved_reloc = TRUE;
8480 break;
8481 }
8482 relocation
8483 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8484 h, relocation, rel);
8485 addend = 0;
8486 break;
8487
8488 /* Indirect .sdata2 relocation. */
8489 case R_PPC_EMB_SDA2I16:
8490 BFD_ASSERT (htab->sdata[1].section != NULL);
8491 if (!is_static_defined (htab->sdata[1].sym))
8492 {
8493 unresolved_reloc = TRUE;
8494 break;
8495 }
8496 relocation
8497 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8498 h, relocation, rel);
8499 addend = 0;
8500 break;
8501
8502 /* Handle the TOC16 reloc. We want to use the offset within the .got
8503 section, not the actual VMA. This is appropriate when generating
8504 an embedded ELF object, for which the .got section acts like the
8505 AIX .toc section. */
8506 case R_PPC_TOC16: /* phony GOT16 relocations */
8507 if (sec == NULL || sec->output_section == NULL)
8508 {
8509 unresolved_reloc = TRUE;
8510 break;
8511 }
8512 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8513 ".got") == 0
8514 || strcmp (bfd_get_section_name (sec->owner, sec),
8515 ".cgot") == 0);
8516
8517 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8518 break;
8519
8520 case R_PPC_PLTREL24:
8521 if (h != NULL && ifunc == NULL)
8522 {
8523 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8524 info->shared ? addend : 0);
8525 if (ent == NULL
8526 || htab->plt == NULL)
8527 {
8528 /* We didn't make a PLT entry for this symbol. This
8529 happens when statically linking PIC code, or when
8530 using -Bsymbolic. */
8531 }
8532 else
8533 {
8534 /* Relocation is to the entry for this symbol in the
8535 procedure linkage table. */
8536 unresolved_reloc = FALSE;
8537 if (htab->plt_type == PLT_NEW)
8538 relocation = (htab->glink->output_section->vma
8539 + htab->glink->output_offset
8540 + ent->glink_offset);
8541 else
8542 relocation = (htab->plt->output_section->vma
8543 + htab->plt->output_offset
8544 + ent->plt.offset);
8545 }
8546 }
8547
8548 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8549 addend specifies the GOT pointer offset within .got2.
8550 Don't apply it to the relocation field. */
8551 addend = 0;
8552 break;
8553
8554 /* Relocate against _SDA_BASE_. */
8555 case R_PPC_SDAREL16:
8556 {
8557 const char *name;
8558 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8559
8560 if (sec == NULL
8561 || sec->output_section == NULL
8562 || !is_static_defined (sda))
8563 {
8564 unresolved_reloc = TRUE;
8565 break;
8566 }
8567 addend -= SYM_VAL (sda);
8568
8569 name = bfd_get_section_name (output_bfd, sec->output_section);
8570 if (! ((CONST_STRNEQ (name, ".sdata")
8571 && (name[6] == 0 || name[6] == '.'))
8572 || (CONST_STRNEQ (name, ".sbss")
8573 && (name[5] == 0 || name[5] == '.'))))
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 /* Relocate against _SDA2_BASE_. */
8587 case R_PPC_EMB_SDA2REL:
8588 {
8589 const char *name;
8590 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8591
8592 if (sec == NULL
8593 || sec->output_section == NULL
8594 || !is_static_defined (sda))
8595 {
8596 unresolved_reloc = TRUE;
8597 break;
8598 }
8599 addend -= SYM_VAL (sda);
8600
8601 name = bfd_get_section_name (output_bfd, sec->output_section);
8602 if (! (CONST_STRNEQ (name, ".sdata2")
8603 || CONST_STRNEQ (name, ".sbss2")))
8604 {
8605 info->callbacks->einfo
8606 (_("%P: %B: the target (%s) of a %s relocation is "
8607 "in the wrong output section (%s)\n"),
8608 input_bfd,
8609 sym_name,
8610 howto->name,
8611 name);
8612 }
8613 }
8614 break;
8615
8616 case R_PPC_VLE_LO16A:
8617 relocation = (relocation + addend) & 0xffff;
8618 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8619 relocation, split16a_type);
8620 continue;
8621
8622 case R_PPC_VLE_LO16D:
8623 relocation = (relocation + addend) & 0xffff;
8624 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8625 relocation, split16d_type);
8626 continue;
8627
8628 case R_PPC_VLE_HI16A:
8629 relocation = ((relocation + addend) >> 16) & 0xffff;
8630 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8631 relocation, split16a_type);
8632 continue;
8633
8634 case R_PPC_VLE_HI16D:
8635 relocation = ((relocation + addend) >> 16) & 0xffff;
8636 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8637 relocation, split16d_type);
8638 continue;
8639
8640 case R_PPC_VLE_HA16A:
8641 {
8642 bfd_vma value = relocation + addend;
8643 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8644 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8645 value, split16a_type);
8646 }
8647 continue;
8648
8649 case R_PPC_VLE_HA16D:
8650 {
8651 bfd_vma value = relocation + addend;
8652 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8653 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8654 value, split16d_type);
8655 }
8656 continue;
8657
8658 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8659 case R_PPC_EMB_SDA21:
8660 case R_PPC_VLE_SDA21:
8661 case R_PPC_EMB_RELSDA:
8662 case R_PPC_VLE_SDA21_LO:
8663 {
8664 const char *name;
8665 int reg;
8666 struct elf_link_hash_entry *sda = NULL;
8667
8668 if (sec == NULL || sec->output_section == NULL)
8669 {
8670 unresolved_reloc = TRUE;
8671 break;
8672 }
8673
8674 name = bfd_get_section_name (output_bfd, sec->output_section);
8675 if (((CONST_STRNEQ (name, ".sdata")
8676 && (name[6] == 0 || name[6] == '.'))
8677 || (CONST_STRNEQ (name, ".sbss")
8678 && (name[5] == 0 || name[5] == '.'))))
8679 {
8680 reg = 13;
8681 sda = htab->sdata[0].sym;
8682 }
8683 else if (CONST_STRNEQ (name, ".sdata2")
8684 || CONST_STRNEQ (name, ".sbss2"))
8685 {
8686 reg = 2;
8687 sda = htab->sdata[1].sym;
8688 }
8689 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8690 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8691 {
8692 reg = 0;
8693 }
8694 else
8695 {
8696 info->callbacks->einfo
8697 (_("%P: %B: the target (%s) of a %s relocation is "
8698 "in the wrong output section (%s)\n"),
8699 input_bfd,
8700 sym_name,
8701 howto->name,
8702 name);
8703
8704 bfd_set_error (bfd_error_bad_value);
8705 ret = FALSE;
8706 continue;
8707 }
8708
8709 if (sda != NULL)
8710 {
8711 if (!is_static_defined (sda))
8712 {
8713 unresolved_reloc = TRUE;
8714 break;
8715 }
8716 addend -= SYM_VAL (sda);
8717 }
8718
8719 if (reg == 0
8720 && (r_type == R_PPC_VLE_SDA21
8721 || r_type == R_PPC_VLE_SDA21_LO))
8722 {
8723 /* Use the split20 format. */
8724 bfd_vma insn, bits12to15, bits21to31;
8725 bfd_vma value = (relocation + rel->r_offset) & 0xffff;
8726 /* Propagate sign bit, if necessary. */
8727 insn = (value & 0x8000) ? 0x70107800 : 0x70000000;
8728 bits12to15 = value & 0x700;
8729 bits21to31 = value & 0x7ff;
8730 insn |= bits12to15;
8731 insn |= bits21to31;
8732 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8733 continue;
8734 }
8735 else if (r_type == R_PPC_EMB_SDA21
8736 || r_type == R_PPC_VLE_SDA21
8737 || r_type == R_PPC_VLE_SDA21_LO)
8738 {
8739 bfd_vma insn; /* Fill in register field. */
8740
8741 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8742 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8743 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8744 }
8745 }
8746 break;
8747
8748 case R_PPC_VLE_SDAREL_LO16A:
8749 case R_PPC_VLE_SDAREL_LO16D:
8750 case R_PPC_VLE_SDAREL_HI16A:
8751 case R_PPC_VLE_SDAREL_HI16D:
8752 case R_PPC_VLE_SDAREL_HA16A:
8753 case R_PPC_VLE_SDAREL_HA16D:
8754 {
8755 bfd_vma value;
8756 const char *name;
8757 //int reg;
8758 struct elf_link_hash_entry *sda = NULL;
8759
8760 if (sec == NULL || sec->output_section == NULL)
8761 {
8762 unresolved_reloc = TRUE;
8763 break;
8764 }
8765
8766 name = bfd_get_section_name (output_bfd, sec->output_section);
8767 if (((CONST_STRNEQ (name, ".sdata")
8768 && (name[6] == 0 || name[6] == '.'))
8769 || (CONST_STRNEQ (name, ".sbss")
8770 && (name[5] == 0 || name[5] == '.'))))
8771 {
8772 //reg = 13;
8773 sda = htab->sdata[0].sym;
8774 }
8775 else if (CONST_STRNEQ (name, ".sdata2")
8776 || CONST_STRNEQ (name, ".sbss2"))
8777 {
8778 //reg = 2;
8779 sda = htab->sdata[1].sym;
8780 }
8781 else
8782 {
8783 (*_bfd_error_handler)
8784 (_("%B: the target (%s) of a %s relocation is "
8785 "in the wrong output section (%s)"),
8786 input_bfd,
8787 sym_name,
8788 howto->name,
8789 name);
8790
8791 bfd_set_error (bfd_error_bad_value);
8792 ret = FALSE;
8793 continue;
8794 }
8795
8796 if (sda != NULL)
8797 {
8798 if (!is_static_defined (sda))
8799 {
8800 unresolved_reloc = TRUE;
8801 break;
8802 }
8803 }
8804
8805 value = sda->root.u.def.section->output_section->vma
8806 + sda->root.u.def.section->output_offset;
8807
8808 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8809 {
8810 value = (value + addend) & 0xffff;
8811 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8812 value, split16a_type);
8813 }
8814 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8815 {
8816 value = (value + addend) & 0xffff;
8817 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8818 value, split16d_type);
8819 }
8820 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8821 {
8822 value = ((value + addend) >> 16) & 0xffff;
8823 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8824 value, split16a_type);
8825 }
8826 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8827 {
8828 value = ((value + addend) >> 16) & 0xffff;
8829 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8830 value, split16d_type);
8831 }
8832 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8833 {
8834 value += addend;
8835 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8836 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8837 value, split16a_type);
8838 }
8839 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8840 {
8841 value += addend;
8842 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8843 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8844 value, split16d_type);
8845 }
8846 }
8847 continue;
8848
8849 /* Relocate against the beginning of the section. */
8850 case R_PPC_SECTOFF:
8851 case R_PPC_SECTOFF_LO:
8852 case R_PPC_SECTOFF_HI:
8853 case R_PPC_SECTOFF_HA:
8854 if (sec == NULL || sec->output_section == NULL)
8855 {
8856 unresolved_reloc = TRUE;
8857 break;
8858 }
8859 addend -= sec->output_section->vma;
8860 break;
8861
8862 /* Negative relocations. */
8863 case R_PPC_EMB_NADDR32:
8864 case R_PPC_EMB_NADDR16:
8865 case R_PPC_EMB_NADDR16_LO:
8866 case R_PPC_EMB_NADDR16_HI:
8867 case R_PPC_EMB_NADDR16_HA:
8868 addend -= 2 * relocation;
8869 break;
8870
8871 case R_PPC_COPY:
8872 case R_PPC_GLOB_DAT:
8873 case R_PPC_JMP_SLOT:
8874 case R_PPC_RELATIVE:
8875 case R_PPC_IRELATIVE:
8876 case R_PPC_PLT32:
8877 case R_PPC_PLTREL32:
8878 case R_PPC_PLT16_LO:
8879 case R_PPC_PLT16_HI:
8880 case R_PPC_PLT16_HA:
8881 case R_PPC_ADDR30:
8882 case R_PPC_EMB_RELSEC16:
8883 case R_PPC_EMB_RELST_LO:
8884 case R_PPC_EMB_RELST_HI:
8885 case R_PPC_EMB_RELST_HA:
8886 case R_PPC_EMB_BIT_FLD:
8887 info->callbacks->einfo
8888 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
8889 input_bfd,
8890 howto->name,
8891 sym_name);
8892
8893 bfd_set_error (bfd_error_invalid_operation);
8894 ret = FALSE;
8895 continue;
8896 }
8897
8898 /* Do any further special processing. */
8899 switch (r_type)
8900 {
8901 default:
8902 break;
8903
8904 case R_PPC_ADDR16_HA:
8905 case R_PPC_REL16_HA:
8906 case R_PPC_SECTOFF_HA:
8907 case R_PPC_TPREL16_HA:
8908 case R_PPC_DTPREL16_HA:
8909 case R_PPC_EMB_NADDR16_HA:
8910 case R_PPC_EMB_RELST_HA:
8911 /* It's just possible that this symbol is a weak symbol
8912 that's not actually defined anywhere. In that case,
8913 'sec' would be NULL, and we should leave the symbol
8914 alone (it will be set to zero elsewhere in the link). */
8915 if (sec == NULL)
8916 break;
8917 /* Fall thru */
8918
8919 case R_PPC_PLT16_HA:
8920 case R_PPC_GOT16_HA:
8921 case R_PPC_GOT_TLSGD16_HA:
8922 case R_PPC_GOT_TLSLD16_HA:
8923 case R_PPC_GOT_TPREL16_HA:
8924 case R_PPC_GOT_DTPREL16_HA:
8925 /* Add 0x10000 if sign bit in 0:15 is set.
8926 Bits 0:15 are not used. */
8927 addend += 0x8000;
8928 break;
8929
8930 case R_PPC_ADDR16:
8931 case R_PPC_ADDR16_LO:
8932 case R_PPC_GOT16:
8933 case R_PPC_GOT16_LO:
8934 case R_PPC_SDAREL16:
8935 case R_PPC_SECTOFF:
8936 case R_PPC_SECTOFF_LO:
8937 case R_PPC_DTPREL16:
8938 case R_PPC_DTPREL16_LO:
8939 case R_PPC_TPREL16:
8940 case R_PPC_TPREL16_LO:
8941 case R_PPC_GOT_TLSGD16:
8942 case R_PPC_GOT_TLSGD16_LO:
8943 case R_PPC_GOT_TLSLD16:
8944 case R_PPC_GOT_TLSLD16_LO:
8945 case R_PPC_GOT_DTPREL16:
8946 case R_PPC_GOT_DTPREL16_LO:
8947 case R_PPC_GOT_TPREL16:
8948 case R_PPC_GOT_TPREL16_LO:
8949 {
8950 /* The 32-bit ABI lacks proper relocations to deal with
8951 certain 64-bit instructions. Prevent damage to bits
8952 that make up part of the insn opcode. */
8953 unsigned int insn, mask, lobit;
8954
8955 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
8956 mask = 0;
8957 if (is_insn_ds_form (insn))
8958 mask = 3;
8959 else if (is_insn_dq_form (insn))
8960 mask = 15;
8961 else
8962 break;
8963 lobit = mask & (relocation + addend);
8964 if (lobit != 0)
8965 {
8966 addend -= lobit;
8967 info->callbacks->einfo
8968 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
8969 input_bfd, input_section, rel->r_offset,
8970 howto->name, sym_name, mask + 1);
8971 bfd_set_error (bfd_error_bad_value);
8972 ret = FALSE;
8973 }
8974 addend += insn & mask;
8975 }
8976 break;
8977 }
8978
8979 #ifdef DEBUG
8980 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8981 "offset = %ld, addend = %ld\n",
8982 howto->name,
8983 (int) r_type,
8984 sym_name,
8985 r_symndx,
8986 (long) rel->r_offset,
8987 (long) addend);
8988 #endif
8989
8990 if (unresolved_reloc
8991 && !((input_section->flags & SEC_DEBUGGING) != 0
8992 && h->def_dynamic)
8993 && _bfd_elf_section_offset (output_bfd, info, input_section,
8994 rel->r_offset) != (bfd_vma) -1)
8995 {
8996 info->callbacks->einfo
8997 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
8998 input_bfd, input_section, rel->r_offset,
8999 howto->name,
9000 sym_name);
9001 ret = FALSE;
9002 }
9003
9004 r = _bfd_final_link_relocate (howto,
9005 input_bfd,
9006 input_section,
9007 contents,
9008 rel->r_offset,
9009 relocation,
9010 addend);
9011
9012 if (r != bfd_reloc_ok)
9013 {
9014 if (r == bfd_reloc_overflow)
9015 {
9016 if (warned)
9017 continue;
9018 if (h != NULL
9019 && h->root.type == bfd_link_hash_undefweak
9020 && howto->pc_relative)
9021 {
9022 /* Assume this is a call protected by other code that
9023 detect the symbol is undefined. If this is the case,
9024 we can safely ignore the overflow. If not, the
9025 program is hosed anyway, and a little warning isn't
9026 going to help. */
9027
9028 continue;
9029 }
9030
9031 if (! (*info->callbacks->reloc_overflow) (info,
9032 (h ? &h->root : NULL),
9033 sym_name,
9034 howto->name,
9035 rel->r_addend,
9036 input_bfd,
9037 input_section,
9038 rel->r_offset))
9039 return FALSE;
9040 }
9041 else
9042 {
9043 info->callbacks->einfo
9044 (_("%P: %H: %s reloc against `%s': error %d\n"),
9045 input_bfd, input_section, rel->r_offset,
9046 howto->name, sym_name, (int) r);
9047 ret = FALSE;
9048 }
9049 }
9050 }
9051
9052 #ifdef DEBUG
9053 fprintf (stderr, "\n");
9054 #endif
9055
9056 return ret;
9057 }
9058 \f
9059 /* Finish up dynamic symbol handling. We set the contents of various
9060 dynamic sections here. */
9061
9062 static bfd_boolean
9063 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9064 struct bfd_link_info *info,
9065 struct elf_link_hash_entry *h,
9066 Elf_Internal_Sym *sym)
9067 {
9068 struct ppc_elf_link_hash_table *htab;
9069 struct plt_entry *ent;
9070 bfd_boolean doneone;
9071
9072 #ifdef DEBUG
9073 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9074 h->root.root.string);
9075 #endif
9076
9077 htab = ppc_elf_hash_table (info);
9078 BFD_ASSERT (htab->elf.dynobj != NULL);
9079
9080 doneone = FALSE;
9081 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9082 if (ent->plt.offset != (bfd_vma) -1)
9083 {
9084 if (!doneone)
9085 {
9086 Elf_Internal_Rela rela;
9087 bfd_byte *loc;
9088 bfd_vma reloc_index;
9089
9090 if (htab->plt_type == PLT_NEW
9091 || !htab->elf.dynamic_sections_created
9092 || h->dynindx == -1)
9093 reloc_index = ent->plt.offset / 4;
9094 else
9095 {
9096 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9097 / htab->plt_slot_size);
9098 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9099 && htab->plt_type == PLT_OLD)
9100 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9101 }
9102
9103 /* This symbol has an entry in the procedure linkage table.
9104 Set it up. */
9105 if (htab->plt_type == PLT_VXWORKS
9106 && htab->elf.dynamic_sections_created
9107 && h->dynindx != -1)
9108 {
9109 bfd_vma got_offset;
9110 const bfd_vma *plt_entry;
9111
9112 /* The first three entries in .got.plt are reserved. */
9113 got_offset = (reloc_index + 3) * 4;
9114
9115 /* Use the right PLT. */
9116 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9117 : ppc_elf_vxworks_plt_entry;
9118
9119 /* Fill in the .plt on VxWorks. */
9120 if (info->shared)
9121 {
9122 bfd_put_32 (output_bfd,
9123 plt_entry[0] | PPC_HA (got_offset),
9124 htab->plt->contents + ent->plt.offset + 0);
9125 bfd_put_32 (output_bfd,
9126 plt_entry[1] | PPC_LO (got_offset),
9127 htab->plt->contents + ent->plt.offset + 4);
9128 }
9129 else
9130 {
9131 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9132
9133 bfd_put_32 (output_bfd,
9134 plt_entry[0] | PPC_HA (got_loc),
9135 htab->plt->contents + ent->plt.offset + 0);
9136 bfd_put_32 (output_bfd,
9137 plt_entry[1] | PPC_LO (got_loc),
9138 htab->plt->contents + ent->plt.offset + 4);
9139 }
9140
9141 bfd_put_32 (output_bfd, plt_entry[2],
9142 htab->plt->contents + ent->plt.offset + 8);
9143 bfd_put_32 (output_bfd, plt_entry[3],
9144 htab->plt->contents + ent->plt.offset + 12);
9145
9146 /* This instruction is an immediate load. The value loaded is
9147 the byte offset of the R_PPC_JMP_SLOT relocation from the
9148 start of the .rela.plt section. The value is stored in the
9149 low-order 16 bits of the load instruction. */
9150 /* NOTE: It appears that this is now an index rather than a
9151 prescaled offset. */
9152 bfd_put_32 (output_bfd,
9153 plt_entry[4] | reloc_index,
9154 htab->plt->contents + ent->plt.offset + 16);
9155 /* This instruction is a PC-relative branch whose target is
9156 the start of the PLT section. The address of this branch
9157 instruction is 20 bytes beyond the start of this PLT entry.
9158 The address is encoded in bits 6-29, inclusive. The value
9159 stored is right-shifted by two bits, permitting a 26-bit
9160 offset. */
9161 bfd_put_32 (output_bfd,
9162 (plt_entry[5]
9163 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9164 htab->plt->contents + ent->plt.offset + 20);
9165 bfd_put_32 (output_bfd, plt_entry[6],
9166 htab->plt->contents + ent->plt.offset + 24);
9167 bfd_put_32 (output_bfd, plt_entry[7],
9168 htab->plt->contents + ent->plt.offset + 28);
9169
9170 /* Fill in the GOT entry corresponding to this PLT slot with
9171 the address immediately after the "bctr" instruction
9172 in this PLT entry. */
9173 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9174 + htab->plt->output_offset
9175 + ent->plt.offset + 16),
9176 htab->sgotplt->contents + got_offset);
9177
9178 if (!info->shared)
9179 {
9180 /* Fill in a couple of entries in .rela.plt.unloaded. */
9181 loc = htab->srelplt2->contents
9182 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9183 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9184 * sizeof (Elf32_External_Rela));
9185
9186 /* Provide the @ha relocation for the first instruction. */
9187 rela.r_offset = (htab->plt->output_section->vma
9188 + htab->plt->output_offset
9189 + ent->plt.offset + 2);
9190 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9191 R_PPC_ADDR16_HA);
9192 rela.r_addend = got_offset;
9193 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9194 loc += sizeof (Elf32_External_Rela);
9195
9196 /* Provide the @l relocation for the second instruction. */
9197 rela.r_offset = (htab->plt->output_section->vma
9198 + htab->plt->output_offset
9199 + ent->plt.offset + 6);
9200 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9201 R_PPC_ADDR16_LO);
9202 rela.r_addend = got_offset;
9203 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9204 loc += sizeof (Elf32_External_Rela);
9205
9206 /* Provide a relocation for the GOT entry corresponding to this
9207 PLT slot. Point it at the middle of the .plt entry. */
9208 rela.r_offset = (htab->sgotplt->output_section->vma
9209 + htab->sgotplt->output_offset
9210 + got_offset);
9211 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9212 R_PPC_ADDR32);
9213 rela.r_addend = ent->plt.offset + 16;
9214 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9215 }
9216
9217 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9218 In particular, the offset for the relocation is not the
9219 address of the PLT entry for this function, as specified
9220 by the ABI. Instead, the offset is set to the address of
9221 the GOT slot for this function. See EABI 4.4.4.1. */
9222 rela.r_offset = (htab->sgotplt->output_section->vma
9223 + htab->sgotplt->output_offset
9224 + got_offset);
9225
9226 }
9227 else
9228 {
9229 asection *splt = htab->plt;
9230 if (!htab->elf.dynamic_sections_created
9231 || h->dynindx == -1)
9232 splt = htab->iplt;
9233
9234 rela.r_offset = (splt->output_section->vma
9235 + splt->output_offset
9236 + ent->plt.offset);
9237 if (htab->plt_type == PLT_OLD
9238 || !htab->elf.dynamic_sections_created
9239 || h->dynindx == -1)
9240 {
9241 /* We don't need to fill in the .plt. The ppc dynamic
9242 linker will fill it in. */
9243 }
9244 else
9245 {
9246 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9247 + htab->glink->output_section->vma
9248 + htab->glink->output_offset);
9249 bfd_put_32 (output_bfd, val,
9250 splt->contents + ent->plt.offset);
9251 }
9252 }
9253
9254 /* Fill in the entry in the .rela.plt section. */
9255 rela.r_addend = 0;
9256 if (!htab->elf.dynamic_sections_created
9257 || h->dynindx == -1)
9258 {
9259 BFD_ASSERT (h->type == STT_GNU_IFUNC
9260 && h->def_regular
9261 && (h->root.type == bfd_link_hash_defined
9262 || h->root.type == bfd_link_hash_defweak));
9263 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9264 rela.r_addend = SYM_VAL (h);
9265 }
9266 else
9267 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9268
9269 if (!htab->elf.dynamic_sections_created
9270 || h->dynindx == -1)
9271 loc = (htab->reliplt->contents
9272 + (htab->reliplt->reloc_count++
9273 * sizeof (Elf32_External_Rela)));
9274 else
9275 loc = (htab->relplt->contents
9276 + reloc_index * sizeof (Elf32_External_Rela));
9277 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9278
9279 if (!h->def_regular)
9280 {
9281 /* Mark the symbol as undefined, rather than as
9282 defined in the .plt section. Leave the value if
9283 there were any relocations where pointer equality
9284 matters (this is a clue for the dynamic linker, to
9285 make function pointer comparisons work between an
9286 application and shared library), otherwise set it
9287 to zero. */
9288 sym->st_shndx = SHN_UNDEF;
9289 if (!h->pointer_equality_needed)
9290 sym->st_value = 0;
9291 else if (!h->ref_regular_nonweak)
9292 {
9293 /* This breaks function pointer comparisons, but
9294 that is better than breaking tests for a NULL
9295 function pointer. */
9296 sym->st_value = 0;
9297 }
9298 }
9299 else if (h->type == STT_GNU_IFUNC
9300 && !info->shared)
9301 {
9302 /* Set the value of ifunc symbols in a non-pie
9303 executable to the glink entry. This is to avoid
9304 text relocations. We can't do this for ifunc in
9305 allocate_dynrelocs, as we do for normal dynamic
9306 function symbols with plt entries, because we need
9307 to keep the original value around for the ifunc
9308 relocation. */
9309 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9310 (output_bfd, htab->glink->output_section));
9311 sym->st_value = (ent->glink_offset
9312 + htab->glink->output_offset
9313 + htab->glink->output_section->vma);
9314 }
9315 doneone = TRUE;
9316 }
9317
9318 if (htab->plt_type == PLT_NEW
9319 || !htab->elf.dynamic_sections_created
9320 || h->dynindx == -1)
9321 {
9322 unsigned char *p;
9323 asection *splt = htab->plt;
9324 if (!htab->elf.dynamic_sections_created
9325 || h->dynindx == -1)
9326 splt = htab->iplt;
9327
9328 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9329
9330 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
9331 {
9332 bfd_put_32 (output_bfd, LWZ_11_3, p);
9333 p += 4;
9334 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9335 p += 4;
9336 bfd_put_32 (output_bfd, MR_0_3, p);
9337 p += 4;
9338 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9339 p += 4;
9340 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9341 p += 4;
9342 bfd_put_32 (output_bfd, BEQLR, p);
9343 p += 4;
9344 bfd_put_32 (output_bfd, MR_3_0, p);
9345 p += 4;
9346 bfd_put_32 (output_bfd, NOP, p);
9347 p += 4;
9348 }
9349
9350 write_glink_stub (ent, splt, p, info);
9351
9352 if (!info->shared)
9353 /* We only need one non-PIC glink stub. */
9354 break;
9355 }
9356 else
9357 break;
9358 }
9359
9360 if (h->needs_copy)
9361 {
9362 asection *s;
9363 Elf_Internal_Rela rela;
9364 bfd_byte *loc;
9365
9366 /* This symbols needs a copy reloc. Set it up. */
9367
9368 #ifdef DEBUG
9369 fprintf (stderr, ", copy");
9370 #endif
9371
9372 BFD_ASSERT (h->dynindx != -1);
9373
9374 if (ppc_elf_hash_entry (h)->has_sda_refs)
9375 s = htab->relsbss;
9376 else
9377 s = htab->relbss;
9378 BFD_ASSERT (s != NULL);
9379
9380 rela.r_offset = SYM_VAL (h);
9381 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9382 rela.r_addend = 0;
9383 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9384 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9385 }
9386
9387 #ifdef DEBUG
9388 fprintf (stderr, "\n");
9389 #endif
9390
9391 return TRUE;
9392 }
9393 \f
9394 static enum elf_reloc_type_class
9395 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9396 const asection *rel_sec,
9397 const Elf_Internal_Rela *rela)
9398 {
9399 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9400
9401 if (rel_sec == htab->reliplt)
9402 return reloc_class_ifunc;
9403
9404 switch (ELF32_R_TYPE (rela->r_info))
9405 {
9406 case R_PPC_RELATIVE:
9407 return reloc_class_relative;
9408 case R_PPC_JMP_SLOT:
9409 return reloc_class_plt;
9410 case R_PPC_COPY:
9411 return reloc_class_copy;
9412 default:
9413 return reloc_class_normal;
9414 }
9415 }
9416 \f
9417 /* Finish up the dynamic sections. */
9418
9419 static bfd_boolean
9420 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9421 struct bfd_link_info *info)
9422 {
9423 asection *sdyn;
9424 asection *splt;
9425 struct ppc_elf_link_hash_table *htab;
9426 bfd_vma got;
9427 bfd *dynobj;
9428 bfd_boolean ret = TRUE;
9429
9430 #ifdef DEBUG
9431 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9432 #endif
9433
9434 htab = ppc_elf_hash_table (info);
9435 dynobj = elf_hash_table (info)->dynobj;
9436 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9437 if (htab->is_vxworks)
9438 splt = bfd_get_linker_section (dynobj, ".plt");
9439 else
9440 splt = NULL;
9441
9442 got = 0;
9443 if (htab->elf.hgot != NULL)
9444 got = SYM_VAL (htab->elf.hgot);
9445
9446 if (htab->elf.dynamic_sections_created)
9447 {
9448 Elf32_External_Dyn *dyncon, *dynconend;
9449
9450 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9451
9452 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9453 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9454 for (; dyncon < dynconend; dyncon++)
9455 {
9456 Elf_Internal_Dyn dyn;
9457 asection *s;
9458
9459 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9460
9461 switch (dyn.d_tag)
9462 {
9463 case DT_PLTGOT:
9464 if (htab->is_vxworks)
9465 s = htab->sgotplt;
9466 else
9467 s = htab->plt;
9468 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9469 break;
9470
9471 case DT_PLTRELSZ:
9472 dyn.d_un.d_val = htab->relplt->size;
9473 break;
9474
9475 case DT_JMPREL:
9476 s = htab->relplt;
9477 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9478 break;
9479
9480 case DT_PPC_GOT:
9481 dyn.d_un.d_ptr = got;
9482 break;
9483
9484 case DT_RELASZ:
9485 if (htab->is_vxworks)
9486 {
9487 if (htab->relplt)
9488 dyn.d_un.d_ptr -= htab->relplt->size;
9489 break;
9490 }
9491 continue;
9492
9493 default:
9494 if (htab->is_vxworks
9495 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9496 break;
9497 continue;
9498 }
9499
9500 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9501 }
9502 }
9503
9504 if (htab->got != NULL)
9505 {
9506 if (htab->elf.hgot->root.u.def.section == htab->got
9507 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9508 {
9509 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9510
9511 p += htab->elf.hgot->root.u.def.value;
9512 if (htab->plt_type == PLT_OLD)
9513 {
9514 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9515 so that a function can easily find the address of
9516 _GLOBAL_OFFSET_TABLE_. */
9517 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9518 < htab->elf.hgot->root.u.def.section->size);
9519 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9520 }
9521
9522 if (sdyn != NULL)
9523 {
9524 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9525 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9526 < htab->elf.hgot->root.u.def.section->size);
9527 bfd_put_32 (output_bfd, val, p);
9528 }
9529 }
9530 else
9531 {
9532 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9533 htab->elf.hgot->root.root.string,
9534 (htab->sgotplt != NULL
9535 ? htab->sgotplt->name : htab->got->name));
9536 bfd_set_error (bfd_error_bad_value);
9537 ret = FALSE;
9538 }
9539
9540 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9541 }
9542
9543 /* Fill in the first entry in the VxWorks procedure linkage table. */
9544 if (splt && splt->size > 0)
9545 {
9546 /* Use the right PLT. */
9547 const bfd_vma *plt_entry = (info->shared
9548 ? ppc_elf_vxworks_pic_plt0_entry
9549 : ppc_elf_vxworks_plt0_entry);
9550
9551 if (!info->shared)
9552 {
9553 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9554
9555 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9556 splt->contents + 0);
9557 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9558 splt->contents + 4);
9559 }
9560 else
9561 {
9562 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9563 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9564 }
9565 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9566 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9567 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9568 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9569 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9570 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9571
9572 if (! info->shared)
9573 {
9574 Elf_Internal_Rela rela;
9575 bfd_byte *loc;
9576
9577 loc = htab->srelplt2->contents;
9578
9579 /* Output the @ha relocation for the first instruction. */
9580 rela.r_offset = (htab->plt->output_section->vma
9581 + htab->plt->output_offset
9582 + 2);
9583 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9584 rela.r_addend = 0;
9585 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9586 loc += sizeof (Elf32_External_Rela);
9587
9588 /* Output the @l relocation for the second instruction. */
9589 rela.r_offset = (htab->plt->output_section->vma
9590 + htab->plt->output_offset
9591 + 6);
9592 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9593 rela.r_addend = 0;
9594 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9595 loc += sizeof (Elf32_External_Rela);
9596
9597 /* Fix up the remaining relocations. They may have the wrong
9598 symbol index for _G_O_T_ or _P_L_T_ depending on the order
9599 in which symbols were output. */
9600 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
9601 {
9602 Elf_Internal_Rela rel;
9603
9604 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9605 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9606 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9607 loc += sizeof (Elf32_External_Rela);
9608
9609 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9610 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9611 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9612 loc += sizeof (Elf32_External_Rela);
9613
9614 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9615 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
9616 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9617 loc += sizeof (Elf32_External_Rela);
9618 }
9619 }
9620 }
9621
9622 if (htab->glink != NULL
9623 && htab->glink->contents != NULL
9624 && htab->elf.dynamic_sections_created)
9625 {
9626 unsigned char *p;
9627 unsigned char *endp;
9628 bfd_vma res0;
9629 unsigned int i;
9630
9631 /*
9632 * PIC glink code is the following:
9633 *
9634 * # ith PLT code stub.
9635 * addis 11,30,(plt+(i-1)*4-got)@ha
9636 * lwz 11,(plt+(i-1)*4-got)@l(11)
9637 * mtctr 11
9638 * bctr
9639 *
9640 * # A table of branches, one for each plt entry.
9641 * # The idea is that the plt call stub loads ctr and r11 with these
9642 * # addresses, so (r11 - res_0) gives the plt index * 4.
9643 * res_0: b PLTresolve
9644 * res_1: b PLTresolve
9645 * .
9646 * # Some number of entries towards the end can be nops
9647 * res_n_m3: nop
9648 * res_n_m2: nop
9649 * res_n_m1:
9650 *
9651 * PLTresolve:
9652 * addis 11,11,(1f-res_0)@ha
9653 * mflr 0
9654 * bcl 20,31,1f
9655 * 1: addi 11,11,(1b-res_0)@l
9656 * mflr 12
9657 * mtlr 0
9658 * sub 11,11,12 # r11 = index * 4
9659 * addis 12,12,(got+4-1b)@ha
9660 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
9661 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
9662 * mtctr 0
9663 * add 0,11,11
9664 * add 11,0,11 # r11 = index * 12 = reloc offset.
9665 * bctr
9666 */
9667 static const unsigned int pic_plt_resolve[] =
9668 {
9669 ADDIS_11_11,
9670 MFLR_0,
9671 BCL_20_31,
9672 ADDI_11_11,
9673 MFLR_12,
9674 MTLR_0,
9675 SUB_11_11_12,
9676 ADDIS_12_12,
9677 LWZ_0_12,
9678 LWZ_12_12,
9679 MTCTR_0,
9680 ADD_0_11_11,
9681 ADD_11_0_11,
9682 BCTR,
9683 NOP,
9684 NOP
9685 };
9686
9687 /*
9688 * Non-PIC glink code is a little simpler.
9689 *
9690 * # ith PLT code stub.
9691 * lis 11,(plt+(i-1)*4)@ha
9692 * lwz 11,(plt+(i-1)*4)@l(11)
9693 * mtctr 11
9694 * bctr
9695 *
9696 * The branch table is the same, then comes
9697 *
9698 * PLTresolve:
9699 * lis 12,(got+4)@ha
9700 * addis 11,11,(-res_0)@ha
9701 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
9702 * addi 11,11,(-res_0)@l # r11 = index * 4
9703 * mtctr 0
9704 * add 0,11,11
9705 * lwz 12,(got+8)@l(12) # got[2] contains the map address
9706 * add 11,0,11 # r11 = index * 12 = reloc offset.
9707 * bctr
9708 */
9709 static const unsigned int plt_resolve[] =
9710 {
9711 LIS_12,
9712 ADDIS_11_11,
9713 LWZ_0_12,
9714 ADDI_11_11,
9715 MTCTR_0,
9716 ADD_0_11_11,
9717 LWZ_12_12,
9718 ADD_11_0_11,
9719 BCTR,
9720 NOP,
9721 NOP,
9722 NOP,
9723 NOP,
9724 NOP,
9725 NOP,
9726 NOP
9727 };
9728
9729 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
9730 abort ();
9731 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
9732 abort ();
9733
9734 /* Build the branch table, one for each plt entry (less one),
9735 and perhaps some padding. */
9736 p = htab->glink->contents;
9737 p += htab->glink_pltresolve;
9738 endp = htab->glink->contents;
9739 endp += htab->glink->size - GLINK_PLTRESOLVE;
9740 while (p < endp - 8 * 4)
9741 {
9742 bfd_put_32 (output_bfd, B + endp - p, p);
9743 p += 4;
9744 }
9745 while (p < endp)
9746 {
9747 bfd_put_32 (output_bfd, NOP, p);
9748 p += 4;
9749 }
9750
9751 res0 = (htab->glink_pltresolve
9752 + htab->glink->output_section->vma
9753 + htab->glink->output_offset);
9754
9755 /* Last comes the PLTresolve stub. */
9756 if (info->shared)
9757 {
9758 bfd_vma bcl;
9759
9760 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
9761 {
9762 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
9763 p += 4;
9764 }
9765 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
9766
9767 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
9768 + htab->glink->output_section->vma
9769 + htab->glink->output_offset);
9770
9771 bfd_put_32 (output_bfd,
9772 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
9773 bfd_put_32 (output_bfd,
9774 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
9775 bfd_put_32 (output_bfd,
9776 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
9777 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
9778 {
9779 bfd_put_32 (output_bfd,
9780 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
9781 bfd_put_32 (output_bfd,
9782 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
9783 }
9784 else
9785 {
9786 bfd_put_32 (output_bfd,
9787 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
9788 bfd_put_32 (output_bfd,
9789 LWZ_12_12 + 4, p + 9*4);
9790 }
9791 }
9792 else
9793 {
9794 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
9795 {
9796 bfd_put_32 (output_bfd, plt_resolve[i], p);
9797 p += 4;
9798 }
9799 p -= 4 * ARRAY_SIZE (plt_resolve);
9800
9801 bfd_put_32 (output_bfd,
9802 LIS_12 + PPC_HA (got + 4), p + 0*4);
9803 bfd_put_32 (output_bfd,
9804 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
9805 bfd_put_32 (output_bfd,
9806 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
9807 if (PPC_HA (got + 4) == PPC_HA (got + 8))
9808 {
9809 bfd_put_32 (output_bfd,
9810 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
9811 bfd_put_32 (output_bfd,
9812 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
9813 }
9814 else
9815 {
9816 bfd_put_32 (output_bfd,
9817 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
9818 bfd_put_32 (output_bfd,
9819 LWZ_12_12 + 4, p + 6*4);
9820 }
9821 }
9822 }
9823
9824 if (htab->glink_eh_frame != NULL
9825 && htab->glink_eh_frame->contents != NULL)
9826 {
9827 unsigned char *p = htab->glink_eh_frame->contents;
9828 bfd_vma val;
9829
9830 p += sizeof (glink_eh_frame_cie);
9831 /* FDE length. */
9832 p += 4;
9833 /* CIE pointer. */
9834 p += 4;
9835 /* Offset to .glink. */
9836 val = (htab->glink->output_section->vma
9837 + htab->glink->output_offset);
9838 val -= (htab->glink_eh_frame->output_section->vma
9839 + htab->glink_eh_frame->output_offset);
9840 val -= p - htab->glink_eh_frame->contents;
9841 bfd_put_32 (htab->elf.dynobj, val, p);
9842
9843 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
9844 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
9845 htab->glink_eh_frame,
9846 htab->glink_eh_frame->contents))
9847 return FALSE;
9848 }
9849
9850 return ret;
9851 }
9852 \f
9853 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
9854 #define TARGET_LITTLE_NAME "elf32-powerpcle"
9855 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
9856 #define TARGET_BIG_NAME "elf32-powerpc"
9857 #define ELF_ARCH bfd_arch_powerpc
9858 #define ELF_TARGET_ID PPC32_ELF_DATA
9859 #define ELF_MACHINE_CODE EM_PPC
9860 #ifdef __QNXTARGET__
9861 #define ELF_MAXPAGESIZE 0x1000
9862 #else
9863 #define ELF_MAXPAGESIZE 0x10000
9864 #endif
9865 #define ELF_MINPAGESIZE 0x1000
9866 #define ELF_COMMONPAGESIZE 0x1000
9867 #define elf_info_to_howto ppc_elf_info_to_howto
9868
9869 #ifdef EM_CYGNUS_POWERPC
9870 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
9871 #endif
9872
9873 #ifdef EM_PPC_OLD
9874 #define ELF_MACHINE_ALT2 EM_PPC_OLD
9875 #endif
9876
9877 #define elf_backend_plt_not_loaded 1
9878 #define elf_backend_can_gc_sections 1
9879 #define elf_backend_can_refcount 1
9880 #define elf_backend_rela_normal 1
9881
9882 #define bfd_elf32_mkobject ppc_elf_mkobject
9883 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
9884 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
9885 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
9886 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
9887 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
9888 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
9889 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
9890
9891 #define elf_backend_object_p ppc_elf_object_p
9892 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
9893 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
9894 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
9895 #define elf_backend_relocate_section ppc_elf_relocate_section
9896 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
9897 #define elf_backend_check_relocs ppc_elf_check_relocs
9898 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
9899 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
9900 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
9901 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
9902 #define elf_backend_hash_symbol ppc_elf_hash_symbol
9903 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
9904 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
9905 #define elf_backend_fake_sections ppc_elf_fake_sections
9906 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
9907 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
9908 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
9909 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
9910 #define elf_backend_write_core_note ppc_elf_write_core_note
9911 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
9912 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
9913 #define elf_backend_final_write_processing ppc_elf_final_write_processing
9914 #define elf_backend_write_section ppc_elf_write_section
9915 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
9916 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
9917 #define elf_backend_action_discarded ppc_elf_action_discarded
9918 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
9919 #define elf_backend_post_process_headers _bfd_elf_set_osabi
9920 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
9921 #define elf_backend_section_processing ppc_elf_section_processing
9922
9923 #include "elf32-target.h"
9924
9925 /* FreeBSD Target */
9926
9927 #undef TARGET_LITTLE_SYM
9928 #undef TARGET_LITTLE_NAME
9929
9930 #undef TARGET_BIG_SYM
9931 #define TARGET_BIG_SYM bfd_elf32_powerpc_freebsd_vec
9932 #undef TARGET_BIG_NAME
9933 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
9934
9935 #undef ELF_OSABI
9936 #define ELF_OSABI ELFOSABI_FREEBSD
9937
9938 #undef elf32_bed
9939 #define elf32_bed elf32_powerpc_fbsd_bed
9940
9941 #include "elf32-target.h"
9942
9943 /* VxWorks Target */
9944
9945 #undef TARGET_LITTLE_SYM
9946 #undef TARGET_LITTLE_NAME
9947
9948 #undef TARGET_BIG_SYM
9949 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
9950 #undef TARGET_BIG_NAME
9951 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
9952
9953 #undef ELF_OSABI
9954
9955 /* VxWorks uses the elf default section flags for .plt. */
9956 static const struct bfd_elf_special_section *
9957 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9958 {
9959 if (sec->name == NULL)
9960 return NULL;
9961
9962 if (strcmp (sec->name, ".plt") == 0)
9963 return _bfd_elf_get_sec_type_attr (abfd, sec);
9964
9965 return ppc_elf_get_sec_type_attr (abfd, sec);
9966 }
9967
9968 /* Like ppc_elf_link_hash_table_create, but overrides
9969 appropriately for VxWorks. */
9970 static struct bfd_link_hash_table *
9971 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9972 {
9973 struct bfd_link_hash_table *ret;
9974
9975 ret = ppc_elf_link_hash_table_create (abfd);
9976 if (ret)
9977 {
9978 struct ppc_elf_link_hash_table *htab
9979 = (struct ppc_elf_link_hash_table *)ret;
9980 htab->is_vxworks = 1;
9981 htab->plt_type = PLT_VXWORKS;
9982 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
9983 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
9984 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
9985 }
9986 return ret;
9987 }
9988
9989 /* Tweak magic VxWorks symbols as they are loaded. */
9990 static bfd_boolean
9991 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
9992 struct bfd_link_info *info,
9993 Elf_Internal_Sym *sym,
9994 const char **namep ATTRIBUTE_UNUSED,
9995 flagword *flagsp ATTRIBUTE_UNUSED,
9996 asection **secp,
9997 bfd_vma *valp)
9998 {
9999 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10000 valp))
10001 return FALSE;
10002
10003 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10004 }
10005
10006 static void
10007 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10008 {
10009 ppc_elf_final_write_processing(abfd, linker);
10010 elf_vxworks_final_write_processing(abfd, linker);
10011 }
10012
10013 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10014 define it. */
10015 #undef elf_backend_want_plt_sym
10016 #define elf_backend_want_plt_sym 1
10017 #undef elf_backend_want_got_plt
10018 #define elf_backend_want_got_plt 1
10019 #undef elf_backend_got_symbol_offset
10020 #define elf_backend_got_symbol_offset 0
10021 #undef elf_backend_plt_not_loaded
10022 #define elf_backend_plt_not_loaded 0
10023 #undef elf_backend_plt_readonly
10024 #define elf_backend_plt_readonly 1
10025 #undef elf_backend_got_header_size
10026 #define elf_backend_got_header_size 12
10027
10028 #undef bfd_elf32_get_synthetic_symtab
10029
10030 #undef bfd_elf32_bfd_link_hash_table_create
10031 #define bfd_elf32_bfd_link_hash_table_create \
10032 ppc_elf_vxworks_link_hash_table_create
10033 #undef elf_backend_add_symbol_hook
10034 #define elf_backend_add_symbol_hook \
10035 ppc_elf_vxworks_add_symbol_hook
10036 #undef elf_backend_link_output_symbol_hook
10037 #define elf_backend_link_output_symbol_hook \
10038 elf_vxworks_link_output_symbol_hook
10039 #undef elf_backend_final_write_processing
10040 #define elf_backend_final_write_processing \
10041 ppc_elf_vxworks_final_write_processing
10042 #undef elf_backend_get_sec_type_attr
10043 #define elf_backend_get_sec_type_attr \
10044 ppc_elf_vxworks_get_sec_type_attr
10045 #undef elf_backend_emit_relocs
10046 #define elf_backend_emit_relocs \
10047 elf_vxworks_emit_relocs
10048
10049 #undef elf32_bed
10050 #define elf32_bed ppc_elf_vxworks_bed
10051 #undef elf_backend_post_process_headers
10052
10053 #include "elf32-target.h"