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[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Written by Ian Lance Taylor, Cygnus Support.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the
21 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
22 Boston, MA 02110-1301, USA. */
23
24
25 /* This file is based on a preliminary PowerPC ELF ABI. The
26 information may not match the final PowerPC ELF ABI. It includes
27 suggestions from the in-progress Embedded PowerPC ABI, and that
28 information may also not match. */
29
30 #include "sysdep.h"
31 #include <stdarg.h>
32 #include "bfd.h"
33 #include "bfdlink.h"
34 #include "libbfd.h"
35 #include "elf-bfd.h"
36 #include "elf/ppc.h"
37 #include "elf32-ppc.h"
38 #include "elf-vxworks.h"
39 #include "dwarf2.h"
40
41 typedef enum split16_format_type
42 {
43 split16a_type = 0,
44 split16d_type
45 }
46 split16_format_type;
47
48 /* RELA relocations are used here. */
49
50 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
51 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
52 static bfd_reloc_status_type ppc_elf_unhandled_reloc
53 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
54 static void ppc_elf_vle_split16
55 (bfd *, bfd_byte *, bfd_vma, bfd_vma, split16_format_type);
56
57 /* Branch prediction bit for branch taken relocs. */
58 #define BRANCH_PREDICT_BIT 0x200000
59 /* Mask to set RA in memory instructions. */
60 #define RA_REGISTER_MASK 0x001f0000
61 /* Value to shift register by to insert RA. */
62 #define RA_REGISTER_SHIFT 16
63
64 /* The name of the dynamic interpreter. This is put in the .interp
65 section. */
66 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
67
68 /* For old-style PLT. */
69 /* The number of single-slot PLT entries (the rest use two slots). */
70 #define PLT_NUM_SINGLE_ENTRIES 8192
71
72 /* For new-style .glink and .plt. */
73 #define GLINK_PLTRESOLVE 16*4
74 #define GLINK_ENTRY_SIZE 4*4
75 #define TLS_GET_ADDR_GLINK_SIZE 12*4
76
77 /* VxWorks uses its own plt layout, filled in by the static linker. */
78
79 /* The standard VxWorks PLT entry. */
80 #define VXWORKS_PLT_ENTRY_SIZE 32
81 static const bfd_vma ppc_elf_vxworks_plt_entry
82 [VXWORKS_PLT_ENTRY_SIZE / 4] =
83 {
84 0x3d800000, /* lis r12,0 */
85 0x818c0000, /* lwz r12,0(r12) */
86 0x7d8903a6, /* mtctr r12 */
87 0x4e800420, /* bctr */
88 0x39600000, /* li r11,0 */
89 0x48000000, /* b 14 <.PLT0resolve+0x4> */
90 0x60000000, /* nop */
91 0x60000000, /* nop */
92 };
93 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
94 [VXWORKS_PLT_ENTRY_SIZE / 4] =
95 {
96 0x3d9e0000, /* addis r12,r30,0 */
97 0x818c0000, /* lwz r12,0(r12) */
98 0x7d8903a6, /* mtctr r12 */
99 0x4e800420, /* bctr */
100 0x39600000, /* li r11,0 */
101 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
102 0x60000000, /* nop */
103 0x60000000, /* nop */
104 };
105
106 /* The initial VxWorks PLT entry. */
107 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
108 static const bfd_vma ppc_elf_vxworks_plt0_entry
109 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
110 {
111 0x3d800000, /* lis r12,0 */
112 0x398c0000, /* addi r12,r12,0 */
113 0x800c0008, /* lwz r0,8(r12) */
114 0x7c0903a6, /* mtctr r0 */
115 0x818c0004, /* lwz r12,4(r12) */
116 0x4e800420, /* bctr */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 };
120 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
121 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
122 {
123 0x819e0008, /* lwz r12,8(r30) */
124 0x7d8903a6, /* mtctr r12 */
125 0x819e0004, /* lwz r12,4(r30) */
126 0x4e800420, /* bctr */
127 0x60000000, /* nop */
128 0x60000000, /* nop */
129 0x60000000, /* nop */
130 0x60000000, /* nop */
131 };
132
133 /* For executables, we have some additional relocations in
134 .rela.plt.unloaded, for the kernel loader. */
135
136 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
137 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
138 /* The number of relocations in the PLTResolve slot. */
139 #define VXWORKS_PLTRESOLVE_RELOCS 2
140 /* The number of relocations in the PLTResolve slot when when creating
141 a shared library. */
142 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
143
144 /* Some instructions. */
145 #define ADDIS_11_11 0x3d6b0000
146 #define ADDIS_11_30 0x3d7e0000
147 #define ADDIS_12_12 0x3d8c0000
148 #define ADDI_11_11 0x396b0000
149 #define ADD_0_11_11 0x7c0b5a14
150 #define ADD_3_12_2 0x7c6c1214
151 #define ADD_11_0_11 0x7d605a14
152 #define B 0x48000000
153 #define BCL_20_31 0x429f0005
154 #define BCTR 0x4e800420
155 #define BEQLR 0x4d820020
156 #define CMPWI_11_0 0x2c0b0000
157 #define LIS_11 0x3d600000
158 #define LIS_12 0x3d800000
159 #define LWZU_0_12 0x840c0000
160 #define LWZ_0_12 0x800c0000
161 #define LWZ_11_3 0x81630000
162 #define LWZ_11_11 0x816b0000
163 #define LWZ_11_30 0x817e0000
164 #define LWZ_12_3 0x81830000
165 #define LWZ_12_12 0x818c0000
166 #define MR_0_3 0x7c601b78
167 #define MR_3_0 0x7c030378
168 #define MFLR_0 0x7c0802a6
169 #define MFLR_12 0x7d8802a6
170 #define MTCTR_0 0x7c0903a6
171 #define MTCTR_11 0x7d6903a6
172 #define MTLR_0 0x7c0803a6
173 #define NOP 0x60000000
174 #define SUB_11_11_12 0x7d6c5850
175
176 /* Offset of tp and dtp pointers from start of TLS block. */
177 #define TP_OFFSET 0x7000
178 #define DTP_OFFSET 0x8000
179
180 /* The value of a defined global symbol. */
181 #define SYM_VAL(SYM) \
182 ((SYM)->root.u.def.section->output_section->vma \
183 + (SYM)->root.u.def.section->output_offset \
184 + (SYM)->root.u.def.value)
185 \f
186 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
187
188 static reloc_howto_type ppc_elf_howto_raw[] = {
189 /* This reloc does nothing. */
190 HOWTO (R_PPC_NONE, /* type */
191 0, /* rightshift */
192 2, /* size (0 = byte, 1 = short, 2 = long) */
193 32, /* bitsize */
194 FALSE, /* pc_relative */
195 0, /* bitpos */
196 complain_overflow_bitfield, /* complain_on_overflow */
197 bfd_elf_generic_reloc, /* special_function */
198 "R_PPC_NONE", /* name */
199 FALSE, /* partial_inplace */
200 0, /* src_mask */
201 0, /* dst_mask */
202 FALSE), /* pcrel_offset */
203
204 /* A standard 32 bit relocation. */
205 HOWTO (R_PPC_ADDR32, /* type */
206 0, /* rightshift */
207 2, /* size (0 = byte, 1 = short, 2 = long) */
208 32, /* bitsize */
209 FALSE, /* pc_relative */
210 0, /* bitpos */
211 complain_overflow_bitfield, /* complain_on_overflow */
212 bfd_elf_generic_reloc, /* special_function */
213 "R_PPC_ADDR32", /* name */
214 FALSE, /* partial_inplace */
215 0, /* src_mask */
216 0xffffffff, /* dst_mask */
217 FALSE), /* pcrel_offset */
218
219 /* An absolute 26 bit branch; the lower two bits must be zero.
220 FIXME: we don't check that, we just clear them. */
221 HOWTO (R_PPC_ADDR24, /* type */
222 0, /* rightshift */
223 2, /* size (0 = byte, 1 = short, 2 = long) */
224 26, /* bitsize */
225 FALSE, /* pc_relative */
226 0, /* bitpos */
227 complain_overflow_bitfield, /* complain_on_overflow */
228 bfd_elf_generic_reloc, /* special_function */
229 "R_PPC_ADDR24", /* name */
230 FALSE, /* partial_inplace */
231 0, /* src_mask */
232 0x3fffffc, /* dst_mask */
233 FALSE), /* pcrel_offset */
234
235 /* A standard 16 bit relocation. */
236 HOWTO (R_PPC_ADDR16, /* type */
237 0, /* rightshift */
238 1, /* size (0 = byte, 1 = short, 2 = long) */
239 16, /* bitsize */
240 FALSE, /* pc_relative */
241 0, /* bitpos */
242 complain_overflow_bitfield, /* complain_on_overflow */
243 bfd_elf_generic_reloc, /* special_function */
244 "R_PPC_ADDR16", /* name */
245 FALSE, /* partial_inplace */
246 0, /* src_mask */
247 0xffff, /* dst_mask */
248 FALSE), /* pcrel_offset */
249
250 /* A 16 bit relocation without overflow. */
251 HOWTO (R_PPC_ADDR16_LO, /* type */
252 0, /* rightshift */
253 1, /* size (0 = byte, 1 = short, 2 = long) */
254 16, /* bitsize */
255 FALSE, /* pc_relative */
256 0, /* bitpos */
257 complain_overflow_dont,/* complain_on_overflow */
258 bfd_elf_generic_reloc, /* special_function */
259 "R_PPC_ADDR16_LO", /* name */
260 FALSE, /* partial_inplace */
261 0, /* src_mask */
262 0xffff, /* dst_mask */
263 FALSE), /* pcrel_offset */
264
265 /* The high order 16 bits of an address. */
266 HOWTO (R_PPC_ADDR16_HI, /* type */
267 16, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 FALSE, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_dont, /* complain_on_overflow */
273 bfd_elf_generic_reloc, /* special_function */
274 "R_PPC_ADDR16_HI", /* name */
275 FALSE, /* partial_inplace */
276 0, /* src_mask */
277 0xffff, /* dst_mask */
278 FALSE), /* pcrel_offset */
279
280 /* The high order 16 bits of an address, plus 1 if the contents of
281 the low 16 bits, treated as a signed number, is negative. */
282 HOWTO (R_PPC_ADDR16_HA, /* type */
283 16, /* rightshift */
284 1, /* size (0 = byte, 1 = short, 2 = long) */
285 16, /* bitsize */
286 FALSE, /* pc_relative */
287 0, /* bitpos */
288 complain_overflow_dont, /* complain_on_overflow */
289 ppc_elf_addr16_ha_reloc, /* special_function */
290 "R_PPC_ADDR16_HA", /* name */
291 FALSE, /* partial_inplace */
292 0, /* src_mask */
293 0xffff, /* dst_mask */
294 FALSE), /* pcrel_offset */
295
296 /* An absolute 16 bit branch; the lower two bits must be zero.
297 FIXME: we don't check that, we just clear them. */
298 HOWTO (R_PPC_ADDR14, /* type */
299 0, /* rightshift */
300 2, /* size (0 = byte, 1 = short, 2 = long) */
301 16, /* bitsize */
302 FALSE, /* pc_relative */
303 0, /* bitpos */
304 complain_overflow_bitfield, /* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_PPC_ADDR14", /* name */
307 FALSE, /* partial_inplace */
308 0, /* src_mask */
309 0xfffc, /* dst_mask */
310 FALSE), /* pcrel_offset */
311
312 /* An absolute 16 bit branch, for which bit 10 should be set to
313 indicate that the branch is expected to be taken. The lower two
314 bits must be zero. */
315 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
316 0, /* rightshift */
317 2, /* size (0 = byte, 1 = short, 2 = long) */
318 16, /* bitsize */
319 FALSE, /* pc_relative */
320 0, /* bitpos */
321 complain_overflow_bitfield, /* complain_on_overflow */
322 bfd_elf_generic_reloc, /* special_function */
323 "R_PPC_ADDR14_BRTAKEN",/* name */
324 FALSE, /* partial_inplace */
325 0, /* src_mask */
326 0xfffc, /* dst_mask */
327 FALSE), /* pcrel_offset */
328
329 /* An absolute 16 bit branch, for which bit 10 should be set to
330 indicate that the branch is not expected to be taken. The lower
331 two bits must be zero. */
332 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
333 0, /* rightshift */
334 2, /* size (0 = byte, 1 = short, 2 = long) */
335 16, /* bitsize */
336 FALSE, /* pc_relative */
337 0, /* bitpos */
338 complain_overflow_bitfield, /* complain_on_overflow */
339 bfd_elf_generic_reloc, /* special_function */
340 "R_PPC_ADDR14_BRNTAKEN",/* name */
341 FALSE, /* partial_inplace */
342 0, /* src_mask */
343 0xfffc, /* dst_mask */
344 FALSE), /* pcrel_offset */
345
346 /* A relative 26 bit branch; the lower two bits must be zero. */
347 HOWTO (R_PPC_REL24, /* type */
348 0, /* rightshift */
349 2, /* size (0 = byte, 1 = short, 2 = long) */
350 26, /* bitsize */
351 TRUE, /* pc_relative */
352 0, /* bitpos */
353 complain_overflow_signed, /* complain_on_overflow */
354 bfd_elf_generic_reloc, /* special_function */
355 "R_PPC_REL24", /* name */
356 FALSE, /* partial_inplace */
357 0, /* src_mask */
358 0x3fffffc, /* dst_mask */
359 TRUE), /* pcrel_offset */
360
361 /* A relative 16 bit branch; the lower two bits must be zero. */
362 HOWTO (R_PPC_REL14, /* type */
363 0, /* rightshift */
364 2, /* size (0 = byte, 1 = short, 2 = long) */
365 16, /* bitsize */
366 TRUE, /* pc_relative */
367 0, /* bitpos */
368 complain_overflow_signed, /* complain_on_overflow */
369 bfd_elf_generic_reloc, /* special_function */
370 "R_PPC_REL14", /* name */
371 FALSE, /* partial_inplace */
372 0, /* src_mask */
373 0xfffc, /* dst_mask */
374 TRUE), /* pcrel_offset */
375
376 /* A relative 16 bit branch. Bit 10 should be set to indicate that
377 the branch is expected to be taken. The lower two bits must be
378 zero. */
379 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
380 0, /* rightshift */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
382 16, /* bitsize */
383 TRUE, /* pc_relative */
384 0, /* bitpos */
385 complain_overflow_signed, /* complain_on_overflow */
386 bfd_elf_generic_reloc, /* special_function */
387 "R_PPC_REL14_BRTAKEN", /* name */
388 FALSE, /* partial_inplace */
389 0, /* src_mask */
390 0xfffc, /* dst_mask */
391 TRUE), /* pcrel_offset */
392
393 /* A relative 16 bit branch. Bit 10 should be set to indicate that
394 the branch is not expected to be taken. The lower two bits must
395 be zero. */
396 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
397 0, /* rightshift */
398 2, /* size (0 = byte, 1 = short, 2 = long) */
399 16, /* bitsize */
400 TRUE, /* pc_relative */
401 0, /* bitpos */
402 complain_overflow_signed, /* complain_on_overflow */
403 bfd_elf_generic_reloc, /* special_function */
404 "R_PPC_REL14_BRNTAKEN",/* name */
405 FALSE, /* partial_inplace */
406 0, /* src_mask */
407 0xfffc, /* dst_mask */
408 TRUE), /* pcrel_offset */
409
410 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
411 symbol. */
412 HOWTO (R_PPC_GOT16, /* type */
413 0, /* rightshift */
414 1, /* size (0 = byte, 1 = short, 2 = long) */
415 16, /* bitsize */
416 FALSE, /* pc_relative */
417 0, /* bitpos */
418 complain_overflow_signed, /* complain_on_overflow */
419 bfd_elf_generic_reloc, /* special_function */
420 "R_PPC_GOT16", /* name */
421 FALSE, /* partial_inplace */
422 0, /* src_mask */
423 0xffff, /* dst_mask */
424 FALSE), /* pcrel_offset */
425
426 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
427 the symbol. */
428 HOWTO (R_PPC_GOT16_LO, /* type */
429 0, /* rightshift */
430 1, /* size (0 = byte, 1 = short, 2 = long) */
431 16, /* bitsize */
432 FALSE, /* pc_relative */
433 0, /* bitpos */
434 complain_overflow_dont, /* complain_on_overflow */
435 bfd_elf_generic_reloc, /* special_function */
436 "R_PPC_GOT16_LO", /* name */
437 FALSE, /* partial_inplace */
438 0, /* src_mask */
439 0xffff, /* dst_mask */
440 FALSE), /* pcrel_offset */
441
442 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
443 the symbol. */
444 HOWTO (R_PPC_GOT16_HI, /* type */
445 16, /* rightshift */
446 1, /* size (0 = byte, 1 = short, 2 = long) */
447 16, /* bitsize */
448 FALSE, /* pc_relative */
449 0, /* bitpos */
450 complain_overflow_bitfield, /* complain_on_overflow */
451 bfd_elf_generic_reloc, /* special_function */
452 "R_PPC_GOT16_HI", /* name */
453 FALSE, /* partial_inplace */
454 0, /* src_mask */
455 0xffff, /* dst_mask */
456 FALSE), /* pcrel_offset */
457
458 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
459 the symbol. */
460 HOWTO (R_PPC_GOT16_HA, /* type */
461 16, /* rightshift */
462 1, /* size (0 = byte, 1 = short, 2 = long) */
463 16, /* bitsize */
464 FALSE, /* pc_relative */
465 0, /* bitpos */
466 complain_overflow_bitfield, /* complain_on_overflow */
467 ppc_elf_addr16_ha_reloc, /* special_function */
468 "R_PPC_GOT16_HA", /* name */
469 FALSE, /* partial_inplace */
470 0, /* src_mask */
471 0xffff, /* dst_mask */
472 FALSE), /* pcrel_offset */
473
474 /* Like R_PPC_REL24, but referring to the procedure linkage table
475 entry for the symbol. */
476 HOWTO (R_PPC_PLTREL24, /* type */
477 0, /* rightshift */
478 2, /* size (0 = byte, 1 = short, 2 = long) */
479 26, /* bitsize */
480 TRUE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_signed, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_PLTREL24", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0x3fffffc, /* dst_mask */
488 TRUE), /* pcrel_offset */
489
490 /* This is used only by the dynamic linker. The symbol should exist
491 both in the object being run and in some shared library. The
492 dynamic linker copies the data addressed by the symbol from the
493 shared library into the object, because the object being
494 run has to have the data at some particular address. */
495 HOWTO (R_PPC_COPY, /* type */
496 0, /* rightshift */
497 2, /* size (0 = byte, 1 = short, 2 = long) */
498 32, /* bitsize */
499 FALSE, /* pc_relative */
500 0, /* bitpos */
501 complain_overflow_bitfield, /* complain_on_overflow */
502 bfd_elf_generic_reloc, /* special_function */
503 "R_PPC_COPY", /* name */
504 FALSE, /* partial_inplace */
505 0, /* src_mask */
506 0, /* dst_mask */
507 FALSE), /* pcrel_offset */
508
509 /* Like R_PPC_ADDR32, but used when setting global offset table
510 entries. */
511 HOWTO (R_PPC_GLOB_DAT, /* type */
512 0, /* rightshift */
513 2, /* size (0 = byte, 1 = short, 2 = long) */
514 32, /* bitsize */
515 FALSE, /* pc_relative */
516 0, /* bitpos */
517 complain_overflow_bitfield, /* complain_on_overflow */
518 bfd_elf_generic_reloc, /* special_function */
519 "R_PPC_GLOB_DAT", /* name */
520 FALSE, /* partial_inplace */
521 0, /* src_mask */
522 0xffffffff, /* dst_mask */
523 FALSE), /* pcrel_offset */
524
525 /* Marks a procedure linkage table entry for a symbol. */
526 HOWTO (R_PPC_JMP_SLOT, /* type */
527 0, /* rightshift */
528 2, /* size (0 = byte, 1 = short, 2 = long) */
529 32, /* bitsize */
530 FALSE, /* pc_relative */
531 0, /* bitpos */
532 complain_overflow_bitfield, /* complain_on_overflow */
533 bfd_elf_generic_reloc, /* special_function */
534 "R_PPC_JMP_SLOT", /* name */
535 FALSE, /* partial_inplace */
536 0, /* src_mask */
537 0, /* dst_mask */
538 FALSE), /* pcrel_offset */
539
540 /* Used only by the dynamic linker. When the object is run, this
541 longword is set to the load address of the object, plus the
542 addend. */
543 HOWTO (R_PPC_RELATIVE, /* type */
544 0, /* rightshift */
545 2, /* size (0 = byte, 1 = short, 2 = long) */
546 32, /* bitsize */
547 FALSE, /* pc_relative */
548 0, /* bitpos */
549 complain_overflow_bitfield, /* complain_on_overflow */
550 bfd_elf_generic_reloc, /* special_function */
551 "R_PPC_RELATIVE", /* name */
552 FALSE, /* partial_inplace */
553 0, /* src_mask */
554 0xffffffff, /* dst_mask */
555 FALSE), /* pcrel_offset */
556
557 /* Like R_PPC_REL24, but uses the value of the symbol within the
558 object rather than the final value. Normally used for
559 _GLOBAL_OFFSET_TABLE_. */
560 HOWTO (R_PPC_LOCAL24PC, /* type */
561 0, /* rightshift */
562 2, /* size (0 = byte, 1 = short, 2 = long) */
563 26, /* bitsize */
564 TRUE, /* pc_relative */
565 0, /* bitpos */
566 complain_overflow_signed, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 "R_PPC_LOCAL24PC", /* name */
569 FALSE, /* partial_inplace */
570 0, /* src_mask */
571 0x3fffffc, /* dst_mask */
572 TRUE), /* pcrel_offset */
573
574 /* Like R_PPC_ADDR32, but may be unaligned. */
575 HOWTO (R_PPC_UADDR32, /* type */
576 0, /* rightshift */
577 2, /* size (0 = byte, 1 = short, 2 = long) */
578 32, /* bitsize */
579 FALSE, /* pc_relative */
580 0, /* bitpos */
581 complain_overflow_bitfield, /* complain_on_overflow */
582 bfd_elf_generic_reloc, /* special_function */
583 "R_PPC_UADDR32", /* name */
584 FALSE, /* partial_inplace */
585 0, /* src_mask */
586 0xffffffff, /* dst_mask */
587 FALSE), /* pcrel_offset */
588
589 /* Like R_PPC_ADDR16, but may be unaligned. */
590 HOWTO (R_PPC_UADDR16, /* type */
591 0, /* rightshift */
592 1, /* size (0 = byte, 1 = short, 2 = long) */
593 16, /* bitsize */
594 FALSE, /* pc_relative */
595 0, /* bitpos */
596 complain_overflow_bitfield, /* complain_on_overflow */
597 bfd_elf_generic_reloc, /* special_function */
598 "R_PPC_UADDR16", /* name */
599 FALSE, /* partial_inplace */
600 0, /* src_mask */
601 0xffff, /* dst_mask */
602 FALSE), /* pcrel_offset */
603
604 /* 32-bit PC relative */
605 HOWTO (R_PPC_REL32, /* type */
606 0, /* rightshift */
607 2, /* size (0 = byte, 1 = short, 2 = long) */
608 32, /* bitsize */
609 TRUE, /* pc_relative */
610 0, /* bitpos */
611 complain_overflow_bitfield, /* complain_on_overflow */
612 bfd_elf_generic_reloc, /* special_function */
613 "R_PPC_REL32", /* name */
614 FALSE, /* partial_inplace */
615 0, /* src_mask */
616 0xffffffff, /* dst_mask */
617 TRUE), /* pcrel_offset */
618
619 /* 32-bit relocation to the symbol's procedure linkage table.
620 FIXME: not supported. */
621 HOWTO (R_PPC_PLT32, /* type */
622 0, /* rightshift */
623 2, /* size (0 = byte, 1 = short, 2 = long) */
624 32, /* bitsize */
625 FALSE, /* pc_relative */
626 0, /* bitpos */
627 complain_overflow_bitfield, /* complain_on_overflow */
628 bfd_elf_generic_reloc, /* special_function */
629 "R_PPC_PLT32", /* name */
630 FALSE, /* partial_inplace */
631 0, /* src_mask */
632 0, /* dst_mask */
633 FALSE), /* pcrel_offset */
634
635 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
636 FIXME: not supported. */
637 HOWTO (R_PPC_PLTREL32, /* type */
638 0, /* rightshift */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
640 32, /* bitsize */
641 TRUE, /* pc_relative */
642 0, /* bitpos */
643 complain_overflow_bitfield, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 "R_PPC_PLTREL32", /* name */
646 FALSE, /* partial_inplace */
647 0, /* src_mask */
648 0, /* dst_mask */
649 TRUE), /* pcrel_offset */
650
651 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
652 the symbol. */
653 HOWTO (R_PPC_PLT16_LO, /* type */
654 0, /* rightshift */
655 1, /* size (0 = byte, 1 = short, 2 = long) */
656 16, /* bitsize */
657 FALSE, /* pc_relative */
658 0, /* bitpos */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 "R_PPC_PLT16_LO", /* name */
662 FALSE, /* partial_inplace */
663 0, /* src_mask */
664 0xffff, /* dst_mask */
665 FALSE), /* pcrel_offset */
666
667 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
668 the symbol. */
669 HOWTO (R_PPC_PLT16_HI, /* type */
670 16, /* rightshift */
671 1, /* size (0 = byte, 1 = short, 2 = long) */
672 16, /* bitsize */
673 FALSE, /* pc_relative */
674 0, /* bitpos */
675 complain_overflow_bitfield, /* complain_on_overflow */
676 bfd_elf_generic_reloc, /* special_function */
677 "R_PPC_PLT16_HI", /* name */
678 FALSE, /* partial_inplace */
679 0, /* src_mask */
680 0xffff, /* dst_mask */
681 FALSE), /* pcrel_offset */
682
683 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
684 the symbol. */
685 HOWTO (R_PPC_PLT16_HA, /* type */
686 16, /* rightshift */
687 1, /* size (0 = byte, 1 = short, 2 = long) */
688 16, /* bitsize */
689 FALSE, /* pc_relative */
690 0, /* bitpos */
691 complain_overflow_bitfield, /* complain_on_overflow */
692 ppc_elf_addr16_ha_reloc, /* special_function */
693 "R_PPC_PLT16_HA", /* name */
694 FALSE, /* partial_inplace */
695 0, /* src_mask */
696 0xffff, /* dst_mask */
697 FALSE), /* pcrel_offset */
698
699 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
700 small data items. */
701 HOWTO (R_PPC_SDAREL16, /* type */
702 0, /* rightshift */
703 1, /* size (0 = byte, 1 = short, 2 = long) */
704 16, /* bitsize */
705 FALSE, /* pc_relative */
706 0, /* bitpos */
707 complain_overflow_signed, /* complain_on_overflow */
708 bfd_elf_generic_reloc, /* special_function */
709 "R_PPC_SDAREL16", /* name */
710 FALSE, /* partial_inplace */
711 0, /* src_mask */
712 0xffff, /* dst_mask */
713 FALSE), /* pcrel_offset */
714
715 /* 16-bit section relative relocation. */
716 HOWTO (R_PPC_SECTOFF, /* type */
717 0, /* rightshift */
718 1, /* size (0 = byte, 1 = short, 2 = long) */
719 16, /* bitsize */
720 FALSE, /* pc_relative */
721 0, /* bitpos */
722 complain_overflow_bitfield, /* complain_on_overflow */
723 bfd_elf_generic_reloc, /* special_function */
724 "R_PPC_SECTOFF", /* name */
725 FALSE, /* partial_inplace */
726 0, /* src_mask */
727 0xffff, /* dst_mask */
728 FALSE), /* pcrel_offset */
729
730 /* 16-bit lower half section relative relocation. */
731 HOWTO (R_PPC_SECTOFF_LO, /* type */
732 0, /* rightshift */
733 1, /* size (0 = byte, 1 = short, 2 = long) */
734 16, /* bitsize */
735 FALSE, /* pc_relative */
736 0, /* bitpos */
737 complain_overflow_dont, /* complain_on_overflow */
738 bfd_elf_generic_reloc, /* special_function */
739 "R_PPC_SECTOFF_LO", /* name */
740 FALSE, /* partial_inplace */
741 0, /* src_mask */
742 0xffff, /* dst_mask */
743 FALSE), /* pcrel_offset */
744
745 /* 16-bit upper half section relative relocation. */
746 HOWTO (R_PPC_SECTOFF_HI, /* type */
747 16, /* rightshift */
748 1, /* size (0 = byte, 1 = short, 2 = long) */
749 16, /* bitsize */
750 FALSE, /* pc_relative */
751 0, /* bitpos */
752 complain_overflow_bitfield, /* complain_on_overflow */
753 bfd_elf_generic_reloc, /* special_function */
754 "R_PPC_SECTOFF_HI", /* name */
755 FALSE, /* partial_inplace */
756 0, /* src_mask */
757 0xffff, /* dst_mask */
758 FALSE), /* pcrel_offset */
759
760 /* 16-bit upper half adjusted section relative relocation. */
761 HOWTO (R_PPC_SECTOFF_HA, /* type */
762 16, /* rightshift */
763 1, /* size (0 = byte, 1 = short, 2 = long) */
764 16, /* bitsize */
765 FALSE, /* pc_relative */
766 0, /* bitpos */
767 complain_overflow_bitfield, /* complain_on_overflow */
768 ppc_elf_addr16_ha_reloc, /* special_function */
769 "R_PPC_SECTOFF_HA", /* name */
770 FALSE, /* partial_inplace */
771 0, /* src_mask */
772 0xffff, /* dst_mask */
773 FALSE), /* pcrel_offset */
774
775 /* Marker relocs for TLS. */
776 HOWTO (R_PPC_TLS,
777 0, /* rightshift */
778 2, /* size (0 = byte, 1 = short, 2 = long) */
779 32, /* bitsize */
780 FALSE, /* pc_relative */
781 0, /* bitpos */
782 complain_overflow_dont, /* complain_on_overflow */
783 bfd_elf_generic_reloc, /* special_function */
784 "R_PPC_TLS", /* name */
785 FALSE, /* partial_inplace */
786 0, /* src_mask */
787 0, /* dst_mask */
788 FALSE), /* pcrel_offset */
789
790 HOWTO (R_PPC_TLSGD,
791 0, /* rightshift */
792 2, /* size (0 = byte, 1 = short, 2 = long) */
793 32, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 "R_PPC_TLSGD", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 HOWTO (R_PPC_TLSLD,
805 0, /* rightshift */
806 2, /* size (0 = byte, 1 = short, 2 = long) */
807 32, /* bitsize */
808 FALSE, /* pc_relative */
809 0, /* bitpos */
810 complain_overflow_dont, /* complain_on_overflow */
811 bfd_elf_generic_reloc, /* special_function */
812 "R_PPC_TLSLD", /* name */
813 FALSE, /* partial_inplace */
814 0, /* src_mask */
815 0, /* dst_mask */
816 FALSE), /* pcrel_offset */
817
818 /* Computes the load module index of the load module that contains the
819 definition of its TLS sym. */
820 HOWTO (R_PPC_DTPMOD32,
821 0, /* rightshift */
822 2, /* size (0 = byte, 1 = short, 2 = long) */
823 32, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 ppc_elf_unhandled_reloc, /* special_function */
828 "R_PPC_DTPMOD32", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffffffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* Computes a dtv-relative displacement, the difference between the value
835 of sym+add and the base address of the thread-local storage block that
836 contains the definition of sym, minus 0x8000. */
837 HOWTO (R_PPC_DTPREL32,
838 0, /* rightshift */
839 2, /* size (0 = byte, 1 = short, 2 = long) */
840 32, /* bitsize */
841 FALSE, /* pc_relative */
842 0, /* bitpos */
843 complain_overflow_dont, /* complain_on_overflow */
844 ppc_elf_unhandled_reloc, /* special_function */
845 "R_PPC_DTPREL32", /* name */
846 FALSE, /* partial_inplace */
847 0, /* src_mask */
848 0xffffffff, /* dst_mask */
849 FALSE), /* pcrel_offset */
850
851 /* A 16 bit dtprel reloc. */
852 HOWTO (R_PPC_DTPREL16,
853 0, /* rightshift */
854 1, /* size (0 = byte, 1 = short, 2 = long) */
855 16, /* bitsize */
856 FALSE, /* pc_relative */
857 0, /* bitpos */
858 complain_overflow_signed, /* complain_on_overflow */
859 ppc_elf_unhandled_reloc, /* special_function */
860 "R_PPC_DTPREL16", /* name */
861 FALSE, /* partial_inplace */
862 0, /* src_mask */
863 0xffff, /* dst_mask */
864 FALSE), /* pcrel_offset */
865
866 /* Like DTPREL16, but no overflow. */
867 HOWTO (R_PPC_DTPREL16_LO,
868 0, /* rightshift */
869 1, /* size (0 = byte, 1 = short, 2 = long) */
870 16, /* bitsize */
871 FALSE, /* pc_relative */
872 0, /* bitpos */
873 complain_overflow_dont, /* complain_on_overflow */
874 ppc_elf_unhandled_reloc, /* special_function */
875 "R_PPC_DTPREL16_LO", /* name */
876 FALSE, /* partial_inplace */
877 0, /* src_mask */
878 0xffff, /* dst_mask */
879 FALSE), /* pcrel_offset */
880
881 /* Like DTPREL16_LO, but next higher group of 16 bits. */
882 HOWTO (R_PPC_DTPREL16_HI,
883 16, /* rightshift */
884 1, /* size (0 = byte, 1 = short, 2 = long) */
885 16, /* bitsize */
886 FALSE, /* pc_relative */
887 0, /* bitpos */
888 complain_overflow_dont, /* complain_on_overflow */
889 ppc_elf_unhandled_reloc, /* special_function */
890 "R_PPC_DTPREL16_HI", /* name */
891 FALSE, /* partial_inplace */
892 0, /* src_mask */
893 0xffff, /* dst_mask */
894 FALSE), /* pcrel_offset */
895
896 /* Like DTPREL16_HI, but adjust for low 16 bits. */
897 HOWTO (R_PPC_DTPREL16_HA,
898 16, /* rightshift */
899 1, /* size (0 = byte, 1 = short, 2 = long) */
900 16, /* bitsize */
901 FALSE, /* pc_relative */
902 0, /* bitpos */
903 complain_overflow_dont, /* complain_on_overflow */
904 ppc_elf_unhandled_reloc, /* special_function */
905 "R_PPC_DTPREL16_HA", /* name */
906 FALSE, /* partial_inplace */
907 0, /* src_mask */
908 0xffff, /* dst_mask */
909 FALSE), /* pcrel_offset */
910
911 /* Computes a tp-relative displacement, the difference between the value of
912 sym+add and the value of the thread pointer (r13). */
913 HOWTO (R_PPC_TPREL32,
914 0, /* rightshift */
915 2, /* size (0 = byte, 1 = short, 2 = long) */
916 32, /* bitsize */
917 FALSE, /* pc_relative */
918 0, /* bitpos */
919 complain_overflow_dont, /* complain_on_overflow */
920 ppc_elf_unhandled_reloc, /* special_function */
921 "R_PPC_TPREL32", /* name */
922 FALSE, /* partial_inplace */
923 0, /* src_mask */
924 0xffffffff, /* dst_mask */
925 FALSE), /* pcrel_offset */
926
927 /* A 16 bit tprel reloc. */
928 HOWTO (R_PPC_TPREL16,
929 0, /* rightshift */
930 1, /* size (0 = byte, 1 = short, 2 = long) */
931 16, /* bitsize */
932 FALSE, /* pc_relative */
933 0, /* bitpos */
934 complain_overflow_signed, /* complain_on_overflow */
935 ppc_elf_unhandled_reloc, /* special_function */
936 "R_PPC_TPREL16", /* name */
937 FALSE, /* partial_inplace */
938 0, /* src_mask */
939 0xffff, /* dst_mask */
940 FALSE), /* pcrel_offset */
941
942 /* Like TPREL16, but no overflow. */
943 HOWTO (R_PPC_TPREL16_LO,
944 0, /* rightshift */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
946 16, /* bitsize */
947 FALSE, /* pc_relative */
948 0, /* bitpos */
949 complain_overflow_dont, /* complain_on_overflow */
950 ppc_elf_unhandled_reloc, /* special_function */
951 "R_PPC_TPREL16_LO", /* name */
952 FALSE, /* partial_inplace */
953 0, /* src_mask */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
956
957 /* Like TPREL16_LO, but next higher group of 16 bits. */
958 HOWTO (R_PPC_TPREL16_HI,
959 16, /* rightshift */
960 1, /* size (0 = byte, 1 = short, 2 = long) */
961 16, /* bitsize */
962 FALSE, /* pc_relative */
963 0, /* bitpos */
964 complain_overflow_dont, /* complain_on_overflow */
965 ppc_elf_unhandled_reloc, /* special_function */
966 "R_PPC_TPREL16_HI", /* name */
967 FALSE, /* partial_inplace */
968 0, /* src_mask */
969 0xffff, /* dst_mask */
970 FALSE), /* pcrel_offset */
971
972 /* Like TPREL16_HI, but adjust for low 16 bits. */
973 HOWTO (R_PPC_TPREL16_HA,
974 16, /* rightshift */
975 1, /* size (0 = byte, 1 = short, 2 = long) */
976 16, /* bitsize */
977 FALSE, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_dont, /* complain_on_overflow */
980 ppc_elf_unhandled_reloc, /* special_function */
981 "R_PPC_TPREL16_HA", /* name */
982 FALSE, /* partial_inplace */
983 0, /* src_mask */
984 0xffff, /* dst_mask */
985 FALSE), /* pcrel_offset */
986
987 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
988 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
989 to the first entry. */
990 HOWTO (R_PPC_GOT_TLSGD16,
991 0, /* rightshift */
992 1, /* size (0 = byte, 1 = short, 2 = long) */
993 16, /* bitsize */
994 FALSE, /* pc_relative */
995 0, /* bitpos */
996 complain_overflow_signed, /* complain_on_overflow */
997 ppc_elf_unhandled_reloc, /* special_function */
998 "R_PPC_GOT_TLSGD16", /* name */
999 FALSE, /* partial_inplace */
1000 0, /* src_mask */
1001 0xffff, /* dst_mask */
1002 FALSE), /* pcrel_offset */
1003
1004 /* Like GOT_TLSGD16, but no overflow. */
1005 HOWTO (R_PPC_GOT_TLSGD16_LO,
1006 0, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_dont, /* complain_on_overflow */
1012 ppc_elf_unhandled_reloc, /* special_function */
1013 "R_PPC_GOT_TLSGD16_LO", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1020 HOWTO (R_PPC_GOT_TLSGD16_HI,
1021 16, /* rightshift */
1022 1, /* size (0 = byte, 1 = short, 2 = long) */
1023 16, /* bitsize */
1024 FALSE, /* pc_relative */
1025 0, /* bitpos */
1026 complain_overflow_dont, /* complain_on_overflow */
1027 ppc_elf_unhandled_reloc, /* special_function */
1028 "R_PPC_GOT_TLSGD16_HI", /* name */
1029 FALSE, /* partial_inplace */
1030 0, /* src_mask */
1031 0xffff, /* dst_mask */
1032 FALSE), /* pcrel_offset */
1033
1034 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1035 HOWTO (R_PPC_GOT_TLSGD16_HA,
1036 16, /* rightshift */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1038 16, /* bitsize */
1039 FALSE, /* pc_relative */
1040 0, /* bitpos */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc_elf_unhandled_reloc, /* special_function */
1043 "R_PPC_GOT_TLSGD16_HA", /* name */
1044 FALSE, /* partial_inplace */
1045 0, /* src_mask */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1048
1049 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1050 with values (sym+add)@dtpmod and zero, and computes the offset to the
1051 first entry. */
1052 HOWTO (R_PPC_GOT_TLSLD16,
1053 0, /* rightshift */
1054 1, /* size (0 = byte, 1 = short, 2 = long) */
1055 16, /* bitsize */
1056 FALSE, /* pc_relative */
1057 0, /* bitpos */
1058 complain_overflow_signed, /* complain_on_overflow */
1059 ppc_elf_unhandled_reloc, /* special_function */
1060 "R_PPC_GOT_TLSLD16", /* name */
1061 FALSE, /* partial_inplace */
1062 0, /* src_mask */
1063 0xffff, /* dst_mask */
1064 FALSE), /* pcrel_offset */
1065
1066 /* Like GOT_TLSLD16, but no overflow. */
1067 HOWTO (R_PPC_GOT_TLSLD16_LO,
1068 0, /* rightshift */
1069 1, /* size (0 = byte, 1 = short, 2 = long) */
1070 16, /* bitsize */
1071 FALSE, /* pc_relative */
1072 0, /* bitpos */
1073 complain_overflow_dont, /* complain_on_overflow */
1074 ppc_elf_unhandled_reloc, /* special_function */
1075 "R_PPC_GOT_TLSLD16_LO", /* name */
1076 FALSE, /* partial_inplace */
1077 0, /* src_mask */
1078 0xffff, /* dst_mask */
1079 FALSE), /* pcrel_offset */
1080
1081 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1082 HOWTO (R_PPC_GOT_TLSLD16_HI,
1083 16, /* rightshift */
1084 1, /* size (0 = byte, 1 = short, 2 = long) */
1085 16, /* bitsize */
1086 FALSE, /* pc_relative */
1087 0, /* bitpos */
1088 complain_overflow_dont, /* complain_on_overflow */
1089 ppc_elf_unhandled_reloc, /* special_function */
1090 "R_PPC_GOT_TLSLD16_HI", /* name */
1091 FALSE, /* partial_inplace */
1092 0, /* src_mask */
1093 0xffff, /* dst_mask */
1094 FALSE), /* pcrel_offset */
1095
1096 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1097 HOWTO (R_PPC_GOT_TLSLD16_HA,
1098 16, /* rightshift */
1099 1, /* size (0 = byte, 1 = short, 2 = long) */
1100 16, /* bitsize */
1101 FALSE, /* pc_relative */
1102 0, /* bitpos */
1103 complain_overflow_dont, /* complain_on_overflow */
1104 ppc_elf_unhandled_reloc, /* special_function */
1105 "R_PPC_GOT_TLSLD16_HA", /* name */
1106 FALSE, /* partial_inplace */
1107 0, /* src_mask */
1108 0xffff, /* dst_mask */
1109 FALSE), /* pcrel_offset */
1110
1111 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1112 the offset to the entry. */
1113 HOWTO (R_PPC_GOT_DTPREL16,
1114 0, /* rightshift */
1115 1, /* size (0 = byte, 1 = short, 2 = long) */
1116 16, /* bitsize */
1117 FALSE, /* pc_relative */
1118 0, /* bitpos */
1119 complain_overflow_signed, /* complain_on_overflow */
1120 ppc_elf_unhandled_reloc, /* special_function */
1121 "R_PPC_GOT_DTPREL16", /* name */
1122 FALSE, /* partial_inplace */
1123 0, /* src_mask */
1124 0xffff, /* dst_mask */
1125 FALSE), /* pcrel_offset */
1126
1127 /* Like GOT_DTPREL16, but no overflow. */
1128 HOWTO (R_PPC_GOT_DTPREL16_LO,
1129 0, /* rightshift */
1130 1, /* size (0 = byte, 1 = short, 2 = long) */
1131 16, /* bitsize */
1132 FALSE, /* pc_relative */
1133 0, /* bitpos */
1134 complain_overflow_dont, /* complain_on_overflow */
1135 ppc_elf_unhandled_reloc, /* special_function */
1136 "R_PPC_GOT_DTPREL16_LO", /* name */
1137 FALSE, /* partial_inplace */
1138 0, /* src_mask */
1139 0xffff, /* dst_mask */
1140 FALSE), /* pcrel_offset */
1141
1142 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1143 HOWTO (R_PPC_GOT_DTPREL16_HI,
1144 16, /* rightshift */
1145 1, /* size (0 = byte, 1 = short, 2 = long) */
1146 16, /* bitsize */
1147 FALSE, /* pc_relative */
1148 0, /* bitpos */
1149 complain_overflow_dont, /* complain_on_overflow */
1150 ppc_elf_unhandled_reloc, /* special_function */
1151 "R_PPC_GOT_DTPREL16_HI", /* name */
1152 FALSE, /* partial_inplace */
1153 0, /* src_mask */
1154 0xffff, /* dst_mask */
1155 FALSE), /* pcrel_offset */
1156
1157 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1158 HOWTO (R_PPC_GOT_DTPREL16_HA,
1159 16, /* rightshift */
1160 1, /* size (0 = byte, 1 = short, 2 = long) */
1161 16, /* bitsize */
1162 FALSE, /* pc_relative */
1163 0, /* bitpos */
1164 complain_overflow_dont, /* complain_on_overflow */
1165 ppc_elf_unhandled_reloc, /* special_function */
1166 "R_PPC_GOT_DTPREL16_HA", /* name */
1167 FALSE, /* partial_inplace */
1168 0, /* src_mask */
1169 0xffff, /* dst_mask */
1170 FALSE), /* pcrel_offset */
1171
1172 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1173 offset to the entry. */
1174 HOWTO (R_PPC_GOT_TPREL16,
1175 0, /* rightshift */
1176 1, /* size (0 = byte, 1 = short, 2 = long) */
1177 16, /* bitsize */
1178 FALSE, /* pc_relative */
1179 0, /* bitpos */
1180 complain_overflow_signed, /* complain_on_overflow */
1181 ppc_elf_unhandled_reloc, /* special_function */
1182 "R_PPC_GOT_TPREL16", /* name */
1183 FALSE, /* partial_inplace */
1184 0, /* src_mask */
1185 0xffff, /* dst_mask */
1186 FALSE), /* pcrel_offset */
1187
1188 /* Like GOT_TPREL16, but no overflow. */
1189 HOWTO (R_PPC_GOT_TPREL16_LO,
1190 0, /* rightshift */
1191 1, /* size (0 = byte, 1 = short, 2 = long) */
1192 16, /* bitsize */
1193 FALSE, /* pc_relative */
1194 0, /* bitpos */
1195 complain_overflow_dont, /* complain_on_overflow */
1196 ppc_elf_unhandled_reloc, /* special_function */
1197 "R_PPC_GOT_TPREL16_LO", /* name */
1198 FALSE, /* partial_inplace */
1199 0, /* src_mask */
1200 0xffff, /* dst_mask */
1201 FALSE), /* pcrel_offset */
1202
1203 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1204 HOWTO (R_PPC_GOT_TPREL16_HI,
1205 16, /* rightshift */
1206 1, /* size (0 = byte, 1 = short, 2 = long) */
1207 16, /* bitsize */
1208 FALSE, /* pc_relative */
1209 0, /* bitpos */
1210 complain_overflow_dont, /* complain_on_overflow */
1211 ppc_elf_unhandled_reloc, /* special_function */
1212 "R_PPC_GOT_TPREL16_HI", /* name */
1213 FALSE, /* partial_inplace */
1214 0, /* src_mask */
1215 0xffff, /* dst_mask */
1216 FALSE), /* pcrel_offset */
1217
1218 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1219 HOWTO (R_PPC_GOT_TPREL16_HA,
1220 16, /* rightshift */
1221 1, /* size (0 = byte, 1 = short, 2 = long) */
1222 16, /* bitsize */
1223 FALSE, /* pc_relative */
1224 0, /* bitpos */
1225 complain_overflow_dont, /* complain_on_overflow */
1226 ppc_elf_unhandled_reloc, /* special_function */
1227 "R_PPC_GOT_TPREL16_HA", /* name */
1228 FALSE, /* partial_inplace */
1229 0, /* src_mask */
1230 0xffff, /* dst_mask */
1231 FALSE), /* pcrel_offset */
1232
1233 /* The remaining relocs are from the Embedded ELF ABI, and are not
1234 in the SVR4 ELF ABI. */
1235
1236 /* 32 bit value resulting from the addend minus the symbol. */
1237 HOWTO (R_PPC_EMB_NADDR32, /* type */
1238 0, /* rightshift */
1239 2, /* size (0 = byte, 1 = short, 2 = long) */
1240 32, /* bitsize */
1241 FALSE, /* pc_relative */
1242 0, /* bitpos */
1243 complain_overflow_bitfield, /* complain_on_overflow */
1244 bfd_elf_generic_reloc, /* special_function */
1245 "R_PPC_EMB_NADDR32", /* name */
1246 FALSE, /* partial_inplace */
1247 0, /* src_mask */
1248 0xffffffff, /* dst_mask */
1249 FALSE), /* pcrel_offset */
1250
1251 /* 16 bit value resulting from the addend minus the symbol. */
1252 HOWTO (R_PPC_EMB_NADDR16, /* type */
1253 0, /* rightshift */
1254 1, /* size (0 = byte, 1 = short, 2 = long) */
1255 16, /* bitsize */
1256 FALSE, /* pc_relative */
1257 0, /* bitpos */
1258 complain_overflow_bitfield, /* complain_on_overflow */
1259 bfd_elf_generic_reloc, /* special_function */
1260 "R_PPC_EMB_NADDR16", /* name */
1261 FALSE, /* partial_inplace */
1262 0, /* src_mask */
1263 0xffff, /* dst_mask */
1264 FALSE), /* pcrel_offset */
1265
1266 /* 16 bit value resulting from the addend minus the symbol. */
1267 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1268 0, /* rightshift */
1269 1, /* size (0 = byte, 1 = short, 2 = long) */
1270 16, /* bitsize */
1271 FALSE, /* pc_relative */
1272 0, /* bitpos */
1273 complain_overflow_dont,/* complain_on_overflow */
1274 bfd_elf_generic_reloc, /* special_function */
1275 "R_PPC_EMB_ADDR16_LO", /* name */
1276 FALSE, /* partial_inplace */
1277 0, /* src_mask */
1278 0xffff, /* dst_mask */
1279 FALSE), /* pcrel_offset */
1280
1281 /* The high order 16 bits of the addend minus the symbol. */
1282 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1283 16, /* rightshift */
1284 1, /* size (0 = byte, 1 = short, 2 = long) */
1285 16, /* bitsize */
1286 FALSE, /* pc_relative */
1287 0, /* bitpos */
1288 complain_overflow_dont, /* complain_on_overflow */
1289 bfd_elf_generic_reloc, /* special_function */
1290 "R_PPC_EMB_NADDR16_HI", /* name */
1291 FALSE, /* partial_inplace */
1292 0, /* src_mask */
1293 0xffff, /* dst_mask */
1294 FALSE), /* pcrel_offset */
1295
1296 /* The high order 16 bits of the result of the addend minus the address,
1297 plus 1 if the contents of the low 16 bits, treated as a signed number,
1298 is negative. */
1299 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1300 16, /* rightshift */
1301 1, /* size (0 = byte, 1 = short, 2 = long) */
1302 16, /* bitsize */
1303 FALSE, /* pc_relative */
1304 0, /* bitpos */
1305 complain_overflow_dont, /* complain_on_overflow */
1306 ppc_elf_addr16_ha_reloc, /* special_function */
1307 "R_PPC_EMB_NADDR16_HA", /* name */
1308 FALSE, /* partial_inplace */
1309 0, /* src_mask */
1310 0xffff, /* dst_mask */
1311 FALSE), /* pcrel_offset */
1312
1313 /* 16 bit value resulting from allocating a 4 byte word to hold an
1314 address in the .sdata section, and returning the offset from
1315 _SDA_BASE_ for that relocation. */
1316 HOWTO (R_PPC_EMB_SDAI16, /* type */
1317 0, /* rightshift */
1318 1, /* size (0 = byte, 1 = short, 2 = long) */
1319 16, /* bitsize */
1320 FALSE, /* pc_relative */
1321 0, /* bitpos */
1322 complain_overflow_signed, /* complain_on_overflow */
1323 bfd_elf_generic_reloc, /* special_function */
1324 "R_PPC_EMB_SDAI16", /* name */
1325 FALSE, /* partial_inplace */
1326 0, /* src_mask */
1327 0xffff, /* dst_mask */
1328 FALSE), /* pcrel_offset */
1329
1330 /* 16 bit value resulting from allocating a 4 byte word to hold an
1331 address in the .sdata2 section, and returning the offset from
1332 _SDA2_BASE_ for that relocation. */
1333 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1334 0, /* rightshift */
1335 1, /* size (0 = byte, 1 = short, 2 = long) */
1336 16, /* bitsize */
1337 FALSE, /* pc_relative */
1338 0, /* bitpos */
1339 complain_overflow_signed, /* complain_on_overflow */
1340 bfd_elf_generic_reloc, /* special_function */
1341 "R_PPC_EMB_SDA2I16", /* name */
1342 FALSE, /* partial_inplace */
1343 0, /* src_mask */
1344 0xffff, /* dst_mask */
1345 FALSE), /* pcrel_offset */
1346
1347 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1348 small data items. */
1349 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1350 0, /* rightshift */
1351 1, /* size (0 = byte, 1 = short, 2 = long) */
1352 16, /* bitsize */
1353 FALSE, /* pc_relative */
1354 0, /* bitpos */
1355 complain_overflow_signed, /* complain_on_overflow */
1356 bfd_elf_generic_reloc, /* special_function */
1357 "R_PPC_EMB_SDA2REL", /* name */
1358 FALSE, /* partial_inplace */
1359 0, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1362
1363 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1364 signed offset from the appropriate base, and filling in the register
1365 field with the appropriate register (0, 2, or 13). */
1366 HOWTO (R_PPC_EMB_SDA21, /* type */
1367 0, /* rightshift */
1368 2, /* size (0 = byte, 1 = short, 2 = long) */
1369 16, /* bitsize */
1370 FALSE, /* pc_relative */
1371 0, /* bitpos */
1372 complain_overflow_signed, /* complain_on_overflow */
1373 bfd_elf_generic_reloc, /* special_function */
1374 "R_PPC_EMB_SDA21", /* name */
1375 FALSE, /* partial_inplace */
1376 0, /* src_mask */
1377 0xffff, /* dst_mask */
1378 FALSE), /* pcrel_offset */
1379
1380 /* Relocation not handled: R_PPC_EMB_MRKREF */
1381 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1382 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1383 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1384 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1385 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1386
1387 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1388 in the 16 bit signed offset from the appropriate base, and filling in the
1389 register field with the appropriate register (0, 2, or 13). */
1390 HOWTO (R_PPC_EMB_RELSDA, /* type */
1391 0, /* rightshift */
1392 1, /* size (0 = byte, 1 = short, 2 = long) */
1393 16, /* bitsize */
1394 FALSE, /* pc_relative */
1395 0, /* bitpos */
1396 complain_overflow_signed, /* complain_on_overflow */
1397 bfd_elf_generic_reloc, /* special_function */
1398 "R_PPC_EMB_RELSDA", /* name */
1399 FALSE, /* partial_inplace */
1400 0, /* src_mask */
1401 0xffff, /* dst_mask */
1402 FALSE), /* pcrel_offset */
1403
1404 /* A relative 8 bit branch. */
1405 HOWTO (R_PPC_VLE_REL8, /* type */
1406 1, /* rightshift */
1407 1, /* size (0 = byte, 1 = short, 2 = long) */
1408 8, /* bitsize */
1409 TRUE, /* pc_relative */
1410 0, /* bitpos */
1411 complain_overflow_signed, /* complain_on_overflow */
1412 bfd_elf_generic_reloc, /* special_function */
1413 "R_PPC_VLE_REL8", /* name */
1414 FALSE, /* partial_inplace */
1415 0, /* src_mask */
1416 0xff, /* dst_mask */
1417 TRUE), /* pcrel_offset */
1418
1419 /* A relative 15 bit branch. */
1420 HOWTO (R_PPC_VLE_REL15, /* type */
1421 1, /* rightshift */
1422 2, /* size (0 = byte, 1 = short, 2 = long) */
1423 15, /* bitsize */
1424 TRUE, /* pc_relative */
1425 1, /* bitpos */
1426 complain_overflow_signed, /* complain_on_overflow */
1427 bfd_elf_generic_reloc, /* special_function */
1428 "R_PPC_VLE_REL15", /* name */
1429 FALSE, /* partial_inplace */
1430 0, /* src_mask */
1431 0xfe, /* dst_mask */
1432 TRUE), /* pcrel_offset */
1433
1434 /* A relative 24 bit branch. */
1435 HOWTO (R_PPC_VLE_REL24, /* type */
1436 1, /* rightshift */
1437 2, /* size (0 = byte, 1 = short, 2 = long) */
1438 24, /* bitsize */
1439 TRUE, /* pc_relative */
1440 1, /* bitpos */
1441 complain_overflow_signed, /* complain_on_overflow */
1442 bfd_elf_generic_reloc, /* special_function */
1443 "R_PPC_VLE_REL24", /* name */
1444 FALSE, /* partial_inplace */
1445 0, /* src_mask */
1446 0x1fffffe, /* dst_mask */
1447 TRUE), /* pcrel_offset */
1448
1449 /* The 16 LSBS in split16a format. */
1450 HOWTO (R_PPC_VLE_LO16A, /* type */
1451 0, /* rightshift */
1452 2, /* size (0 = byte, 1 = short, 2 = long) */
1453 32, /* bitsize */
1454 FALSE, /* pc_relative */ /* FIXME: Does this apply to split relocs? */
1455 0, /* bitpos */
1456 complain_overflow_bitfield, /* complain_on_overflow */
1457 bfd_elf_generic_reloc, /* special_function */
1458 "R_PPC_VLE_LO16A", /* name */
1459 FALSE, /* partial_inplace */
1460 0, /* src_mask */
1461 0x1f00fff, /* dst_mask */
1462 FALSE), /* pcrel_offset */
1463
1464 /* The 16 LSBS in split16d format. */
1465 HOWTO (R_PPC_VLE_LO16D, /* type */
1466 0, /* rightshift */
1467 2, /* size (0 = byte, 1 = short, 2 = long) */
1468 32, /* bitsize */
1469 FALSE, /* pc_relative */
1470 0, /* bitpos */
1471 complain_overflow_bitfield, /* complain_on_overflow */
1472 bfd_elf_generic_reloc, /* special_function */
1473 "R_PPC_VLE_LO16D", /* name */
1474 FALSE, /* partial_inplace */
1475 0, /* src_mask */
1476 0x1f07ff, /* dst_mask */
1477 FALSE), /* pcrel_offset */
1478
1479 /* Bits 16-31 split16a format. */
1480 HOWTO (R_PPC_VLE_HI16A, /* type */
1481 0, /* rightshift */
1482 2, /* size (0 = byte, 1 = short, 2 = long) */
1483 32, /* bitsize */
1484 FALSE, /* pc_relative */
1485 0, /* bitpos */
1486 complain_overflow_bitfield, /* complain_on_overflow */
1487 bfd_elf_generic_reloc, /* special_function */
1488 "R_PPC_VLE_HI16A", /* name */
1489 FALSE, /* partial_inplace */
1490 0, /* src_mask */
1491 0x1f00fff, /* dst_mask */
1492 FALSE), /* pcrel_offset */
1493
1494 /* Bits 16-31 split16d format. */
1495 HOWTO (R_PPC_VLE_HI16D, /* type */
1496 0, /* rightshift */
1497 2, /* size (0 = byte, 1 = short, 2 = long) */
1498 32, /* bitsize */
1499 FALSE, /* pc_relative */
1500 0, /* bitpos */
1501 complain_overflow_bitfield, /* complain_on_overflow */
1502 bfd_elf_generic_reloc, /* special_function */
1503 "R_PPC_VLE_HI16D", /* name */
1504 FALSE, /* partial_inplace */
1505 0, /* src_mask */
1506 0x1f07ff, /* dst_mask */
1507 FALSE), /* pcrel_offset */
1508
1509 /* Bits 16-31 (High Adjusted) in split16a format. */
1510 HOWTO (R_PPC_VLE_HA16A, /* type */
1511 0, /* rightshift */
1512 2, /* size (0 = byte, 1 = short, 2 = long) */
1513 32, /* bitsize */
1514 FALSE, /* pc_relative */
1515 0, /* bitpos */
1516 complain_overflow_bitfield, /* complain_on_overflow */
1517 bfd_elf_generic_reloc, /* special_function */
1518 "R_PPC_VLE_HA16A", /* name */
1519 FALSE, /* partial_inplace */
1520 0, /* src_mask */
1521 0x1f00fff, /* dst_mask */
1522 FALSE), /* pcrel_offset */
1523
1524 /* Bits 16-31 (High Adjusted) in split16d format. */
1525 HOWTO (R_PPC_VLE_HA16D, /* type */
1526 0, /* rightshift */
1527 2, /* size (0 = byte, 1 = short, 2 = long) */
1528 32, /* bitsize */
1529 FALSE, /* pc_relative */
1530 0, /* bitpos */
1531 complain_overflow_bitfield, /* complain_on_overflow */
1532 bfd_elf_generic_reloc, /* special_function */
1533 "R_PPC_VLE_HA16D", /* name */
1534 FALSE, /* partial_inplace */
1535 0, /* src_mask */
1536 0x1f07ff, /* dst_mask */
1537 FALSE), /* pcrel_offset */
1538
1539 /* This reloc does nothing. */
1540 HOWTO (R_PPC_VLE_SDA21, /* type */
1541 0, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1543 32, /* bitsize */
1544 FALSE, /* pc_relative */
1545 0, /* bitpos */
1546 complain_overflow_bitfield, /* complain_on_overflow */
1547 bfd_elf_generic_reloc, /* special_function */
1548 "R_PPC_VLE_SDA21", /* name */
1549 FALSE, /* partial_inplace */
1550 0, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE), /* pcrel_offset */
1553
1554 /* This reloc does nothing. */
1555 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1556 0, /* rightshift */
1557 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 32, /* bitsize */
1559 FALSE, /* pc_relative */
1560 0, /* bitpos */
1561 complain_overflow_bitfield, /* complain_on_overflow */
1562 bfd_elf_generic_reloc, /* special_function */
1563 "R_PPC_VLE_SDA21_LO", /* name */
1564 FALSE, /* partial_inplace */
1565 0, /* src_mask */
1566 0, /* dst_mask */
1567 FALSE), /* pcrel_offset */
1568
1569 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1570 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1571 0, /* rightshift */
1572 2, /* size (0 = byte, 1 = short, 2 = long) */
1573 32, /* bitsize */
1574 FALSE, /* pc_relative */
1575 0, /* bitpos */
1576 complain_overflow_bitfield, /* complain_on_overflow */
1577 bfd_elf_generic_reloc, /* special_function */
1578 "R_PPC_VLE_SDAREL_LO16A", /* name */
1579 FALSE, /* partial_inplace */
1580 0, /* src_mask */
1581 0x1f00fff, /* dst_mask */
1582 FALSE), /* pcrel_offset */
1583
1584 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1585 /* This reloc does nothing. */
1586 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1587 0, /* rightshift */
1588 2, /* size (0 = byte, 1 = short, 2 = long) */
1589 32, /* bitsize */
1590 FALSE, /* pc_relative */
1591 0, /* bitpos */
1592 complain_overflow_bitfield, /* complain_on_overflow */
1593 bfd_elf_generic_reloc, /* special_function */
1594 "R_PPC_VLE_SDAREL_LO16D", /* name */
1595 FALSE, /* partial_inplace */
1596 0, /* src_mask */
1597 0x1f07ff, /* dst_mask */
1598 FALSE), /* pcrel_offset */
1599
1600 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1601 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1602 0, /* rightshift */
1603 2, /* size (0 = byte, 1 = short, 2 = long) */
1604 32, /* bitsize */
1605 FALSE, /* pc_relative */
1606 0, /* bitpos */
1607 complain_overflow_bitfield, /* complain_on_overflow */
1608 bfd_elf_generic_reloc, /* special_function */
1609 "R_PPC_VLE_SDAREL_HI16A", /* name */
1610 FALSE, /* partial_inplace */
1611 0, /* src_mask */
1612 0x1f00fff, /* dst_mask */
1613 FALSE), /* pcrel_offset */
1614
1615 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1616 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1617 0, /* rightshift */
1618 2, /* size (0 = byte, 1 = short, 2 = long) */
1619 32, /* bitsize */
1620 FALSE, /* pc_relative */
1621 0, /* bitpos */
1622 complain_overflow_bitfield, /* complain_on_overflow */
1623 bfd_elf_generic_reloc, /* special_function */
1624 "R_PPC_VLE_SDAREL_HI16D", /* name */
1625 FALSE, /* partial_inplace */
1626 0, /* src_mask */
1627 0x1f07ff, /* dst_mask */
1628 FALSE), /* pcrel_offset */
1629
1630 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1631 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1632 0, /* rightshift */
1633 2, /* size (0 = byte, 1 = short, 2 = long) */
1634 32, /* bitsize */
1635 FALSE, /* pc_relative */
1636 0, /* bitpos */
1637 complain_overflow_bitfield, /* complain_on_overflow */
1638 bfd_elf_generic_reloc, /* special_function */
1639 "R_PPC_VLE_SDAREL_HA16A", /* name */
1640 FALSE, /* partial_inplace */
1641 0, /* src_mask */
1642 0x1f00fff, /* dst_mask */
1643 FALSE), /* pcrel_offset */
1644
1645 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1646 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1647 0, /* rightshift */
1648 2, /* size (0 = byte, 1 = short, 2 = long) */
1649 32, /* bitsize */
1650 FALSE, /* pc_relative */
1651 0, /* bitpos */
1652 complain_overflow_bitfield, /* complain_on_overflow */
1653 bfd_elf_generic_reloc, /* special_function */
1654 "R_PPC_VLE_SDAREL_HA16D", /* name */
1655 FALSE, /* partial_inplace */
1656 0, /* src_mask */
1657 0x1f07ff, /* dst_mask */
1658 FALSE), /* pcrel_offset */
1659
1660 HOWTO (R_PPC_IRELATIVE, /* type */
1661 0, /* rightshift */
1662 2, /* size (0 = byte, 1 = short, 2 = long) */
1663 32, /* bitsize */
1664 FALSE, /* pc_relative */
1665 0, /* bitpos */
1666 complain_overflow_bitfield, /* complain_on_overflow */
1667 bfd_elf_generic_reloc, /* special_function */
1668 "R_PPC_IRELATIVE", /* name */
1669 FALSE, /* partial_inplace */
1670 0, /* src_mask */
1671 0xffffffff, /* dst_mask */
1672 FALSE), /* pcrel_offset */
1673
1674 /* A 16 bit relative relocation. */
1675 HOWTO (R_PPC_REL16, /* type */
1676 0, /* rightshift */
1677 1, /* size (0 = byte, 1 = short, 2 = long) */
1678 16, /* bitsize */
1679 TRUE, /* pc_relative */
1680 0, /* bitpos */
1681 complain_overflow_bitfield, /* complain_on_overflow */
1682 bfd_elf_generic_reloc, /* special_function */
1683 "R_PPC_REL16", /* name */
1684 FALSE, /* partial_inplace */
1685 0, /* src_mask */
1686 0xffff, /* dst_mask */
1687 TRUE), /* pcrel_offset */
1688
1689 /* A 16 bit relative relocation without overflow. */
1690 HOWTO (R_PPC_REL16_LO, /* type */
1691 0, /* rightshift */
1692 1, /* size (0 = byte, 1 = short, 2 = long) */
1693 16, /* bitsize */
1694 TRUE, /* pc_relative */
1695 0, /* bitpos */
1696 complain_overflow_dont,/* complain_on_overflow */
1697 bfd_elf_generic_reloc, /* special_function */
1698 "R_PPC_REL16_LO", /* name */
1699 FALSE, /* partial_inplace */
1700 0, /* src_mask */
1701 0xffff, /* dst_mask */
1702 TRUE), /* pcrel_offset */
1703
1704 /* The high order 16 bits of a relative address. */
1705 HOWTO (R_PPC_REL16_HI, /* type */
1706 16, /* rightshift */
1707 1, /* size (0 = byte, 1 = short, 2 = long) */
1708 16, /* bitsize */
1709 TRUE, /* pc_relative */
1710 0, /* bitpos */
1711 complain_overflow_dont, /* complain_on_overflow */
1712 bfd_elf_generic_reloc, /* special_function */
1713 "R_PPC_REL16_HI", /* name */
1714 FALSE, /* partial_inplace */
1715 0, /* src_mask */
1716 0xffff, /* dst_mask */
1717 TRUE), /* pcrel_offset */
1718
1719 /* The high order 16 bits of a relative address, plus 1 if the contents of
1720 the low 16 bits, treated as a signed number, is negative. */
1721 HOWTO (R_PPC_REL16_HA, /* type */
1722 16, /* rightshift */
1723 1, /* size (0 = byte, 1 = short, 2 = long) */
1724 16, /* bitsize */
1725 TRUE, /* pc_relative */
1726 0, /* bitpos */
1727 complain_overflow_dont, /* complain_on_overflow */
1728 ppc_elf_addr16_ha_reloc, /* special_function */
1729 "R_PPC_REL16_HA", /* name */
1730 FALSE, /* partial_inplace */
1731 0, /* src_mask */
1732 0xffff, /* dst_mask */
1733 TRUE), /* pcrel_offset */
1734
1735 /* GNU extension to record C++ vtable hierarchy. */
1736 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1737 0, /* rightshift */
1738 0, /* size (0 = byte, 1 = short, 2 = long) */
1739 0, /* bitsize */
1740 FALSE, /* pc_relative */
1741 0, /* bitpos */
1742 complain_overflow_dont, /* complain_on_overflow */
1743 NULL, /* special_function */
1744 "R_PPC_GNU_VTINHERIT", /* name */
1745 FALSE, /* partial_inplace */
1746 0, /* src_mask */
1747 0, /* dst_mask */
1748 FALSE), /* pcrel_offset */
1749
1750 /* GNU extension to record C++ vtable member usage. */
1751 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1752 0, /* rightshift */
1753 0, /* size (0 = byte, 1 = short, 2 = long) */
1754 0, /* bitsize */
1755 FALSE, /* pc_relative */
1756 0, /* bitpos */
1757 complain_overflow_dont, /* complain_on_overflow */
1758 NULL, /* special_function */
1759 "R_PPC_GNU_VTENTRY", /* name */
1760 FALSE, /* partial_inplace */
1761 0, /* src_mask */
1762 0, /* dst_mask */
1763 FALSE), /* pcrel_offset */
1764
1765 /* Phony reloc to handle AIX style TOC entries. */
1766 HOWTO (R_PPC_TOC16, /* type */
1767 0, /* rightshift */
1768 1, /* size (0 = byte, 1 = short, 2 = long) */
1769 16, /* bitsize */
1770 FALSE, /* pc_relative */
1771 0, /* bitpos */
1772 complain_overflow_signed, /* complain_on_overflow */
1773 bfd_elf_generic_reloc, /* special_function */
1774 "R_PPC_TOC16", /* name */
1775 FALSE, /* partial_inplace */
1776 0, /* src_mask */
1777 0xffff, /* dst_mask */
1778 FALSE), /* pcrel_offset */
1779 };
1780 \f
1781 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1782
1783 static void
1784 ppc_elf_howto_init (void)
1785 {
1786 unsigned int i, type;
1787
1788 for (i = 0;
1789 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1790 i++)
1791 {
1792 type = ppc_elf_howto_raw[i].type;
1793 if (type >= (sizeof (ppc_elf_howto_table)
1794 / sizeof (ppc_elf_howto_table[0])))
1795 abort ();
1796 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1797 }
1798 }
1799
1800 static reloc_howto_type *
1801 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1802 bfd_reloc_code_real_type code)
1803 {
1804 enum elf_ppc_reloc_type r;
1805
1806 /* Initialize howto table if not already done. */
1807 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1808 ppc_elf_howto_init ();
1809
1810 switch (code)
1811 {
1812 default:
1813 return NULL;
1814
1815 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1816 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1817 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1818 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1819 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1820 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1821 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1822 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1823 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1824 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1825 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1826 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1827 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1828 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1829 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1830 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1831 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1832 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1833 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1834 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1835 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1836 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1837 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1838 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1839 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1840 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1841 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1842 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1843 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1844 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1845 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1846 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1847 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1848 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1849 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1850 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1851 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1852 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1853 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1854 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1855 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1856 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1857 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1858 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1859 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1860 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1861 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1862 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1863 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1864 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1865 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1866 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1867 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1868 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1869 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1870 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1871 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1872 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1873 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1874 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1875 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1876 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1877 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1878 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1879 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1880 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1881 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1882 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1883 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1884 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1885 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1886 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1887 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1888 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1889 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1890 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1891 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1892 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1893 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1894 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1895 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1896 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1897 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1898 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1899 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1900 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1901 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1902 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1903 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1904 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1905 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1906 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1907 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1908 r = R_PPC_VLE_SDAREL_LO16A;
1909 break;
1910 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1911 r = R_PPC_VLE_SDAREL_LO16D;
1912 break;
1913 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1914 r = R_PPC_VLE_SDAREL_HI16A;
1915 break;
1916 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1917 r = R_PPC_VLE_SDAREL_HI16D;
1918 break;
1919 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1920 r = R_PPC_VLE_SDAREL_HA16A;
1921 break;
1922 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1923 r = R_PPC_VLE_SDAREL_HA16D;
1924 break;
1925 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1926 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1927 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1928 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1929 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1930 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1931 }
1932
1933 return ppc_elf_howto_table[r];
1934 };
1935
1936 static reloc_howto_type *
1937 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1938 const char *r_name)
1939 {
1940 unsigned int i;
1941
1942 for (i = 0;
1943 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1944 i++)
1945 if (ppc_elf_howto_raw[i].name != NULL
1946 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1947 return &ppc_elf_howto_raw[i];
1948
1949 return NULL;
1950 }
1951
1952 /* Set the howto pointer for a PowerPC ELF reloc. */
1953
1954 static void
1955 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1956 arelent *cache_ptr,
1957 Elf_Internal_Rela *dst)
1958 {
1959 /* Initialize howto table if not already done. */
1960 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1961 ppc_elf_howto_init ();
1962
1963 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1964 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1965
1966 /* Just because the above assert didn't trigger doesn't mean that
1967 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1968 if (!cache_ptr->howto)
1969 {
1970 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1971 abfd, ELF32_R_TYPE (dst->r_info));
1972 bfd_set_error (bfd_error_bad_value);
1973
1974 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1975 }
1976 }
1977
1978 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1979
1980 static bfd_reloc_status_type
1981 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1982 arelent *reloc_entry,
1983 asymbol *symbol,
1984 void *data ATTRIBUTE_UNUSED,
1985 asection *input_section,
1986 bfd *output_bfd,
1987 char **error_message ATTRIBUTE_UNUSED)
1988 {
1989 bfd_vma relocation;
1990
1991 if (output_bfd != NULL)
1992 {
1993 reloc_entry->address += input_section->output_offset;
1994 return bfd_reloc_ok;
1995 }
1996
1997 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1998 return bfd_reloc_outofrange;
1999
2000 if (bfd_is_com_section (symbol->section))
2001 relocation = 0;
2002 else
2003 relocation = symbol->value;
2004
2005 relocation += symbol->section->output_section->vma;
2006 relocation += symbol->section->output_offset;
2007 relocation += reloc_entry->addend;
2008 if (reloc_entry->howto->pc_relative)
2009 relocation -= reloc_entry->address;
2010
2011 reloc_entry->addend += (relocation & 0x8000) << 1;
2012
2013 return bfd_reloc_continue;
2014 }
2015
2016 static bfd_reloc_status_type
2017 ppc_elf_unhandled_reloc (bfd *abfd,
2018 arelent *reloc_entry,
2019 asymbol *symbol,
2020 void *data,
2021 asection *input_section,
2022 bfd *output_bfd,
2023 char **error_message)
2024 {
2025 /* If this is a relocatable link (output_bfd test tells us), just
2026 call the generic function. Any adjustment will be done at final
2027 link time. */
2028 if (output_bfd != NULL)
2029 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2030 input_section, output_bfd, error_message);
2031
2032 if (error_message != NULL)
2033 {
2034 static char buf[60];
2035 sprintf (buf, _("generic linker can't handle %s"),
2036 reloc_entry->howto->name);
2037 *error_message = buf;
2038 }
2039 return bfd_reloc_dangerous;
2040 }
2041 \f
2042 /* Sections created by the linker. */
2043
2044 typedef struct elf_linker_section
2045 {
2046 /* Pointer to the bfd section. */
2047 asection *section;
2048 /* Section name. */
2049 const char *name;
2050 /* Associated bss section name. */
2051 const char *bss_name;
2052 /* Associated symbol name. */
2053 const char *sym_name;
2054 /* Associated symbol. */
2055 struct elf_link_hash_entry *sym;
2056 } elf_linker_section_t;
2057
2058 /* Linked list of allocated pointer entries. This hangs off of the
2059 symbol lists, and provides allows us to return different pointers,
2060 based on different addend's. */
2061
2062 typedef struct elf_linker_section_pointers
2063 {
2064 /* next allocated pointer for this symbol */
2065 struct elf_linker_section_pointers *next;
2066 /* offset of pointer from beginning of section */
2067 bfd_vma offset;
2068 /* addend used */
2069 bfd_vma addend;
2070 /* which linker section this is */
2071 elf_linker_section_t *lsect;
2072 } elf_linker_section_pointers_t;
2073
2074 struct ppc_elf_obj_tdata
2075 {
2076 struct elf_obj_tdata elf;
2077
2078 /* A mapping from local symbols to offsets into the various linker
2079 sections added. This is index by the symbol index. */
2080 elf_linker_section_pointers_t **linker_section_pointers;
2081
2082 /* Flags used to auto-detect plt type. */
2083 unsigned int makes_plt_call : 1;
2084 unsigned int has_rel16 : 1;
2085 };
2086
2087 #define ppc_elf_tdata(bfd) \
2088 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2089
2090 #define elf_local_ptr_offsets(bfd) \
2091 (ppc_elf_tdata (bfd)->linker_section_pointers)
2092
2093 #define is_ppc_elf(bfd) \
2094 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2095 && elf_object_id (bfd) == PPC32_ELF_DATA)
2096
2097 /* Override the generic function because we store some extras. */
2098
2099 static bfd_boolean
2100 ppc_elf_mkobject (bfd *abfd)
2101 {
2102 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2103 PPC32_ELF_DATA);
2104 }
2105
2106 /* Fix bad default arch selected for a 32 bit input bfd when the
2107 default is 64 bit. */
2108
2109 static bfd_boolean
2110 ppc_elf_object_p (bfd *abfd)
2111 {
2112 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2113 {
2114 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2115
2116 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2117 {
2118 /* Relies on arch after 64 bit default being 32 bit default. */
2119 abfd->arch_info = abfd->arch_info->next;
2120 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2121 }
2122 }
2123 return TRUE;
2124 }
2125
2126 /* Function to set whether a module needs the -mrelocatable bit set. */
2127
2128 static bfd_boolean
2129 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2130 {
2131 BFD_ASSERT (!elf_flags_init (abfd)
2132 || elf_elfheader (abfd)->e_flags == flags);
2133
2134 elf_elfheader (abfd)->e_flags = flags;
2135 elf_flags_init (abfd) = TRUE;
2136 return TRUE;
2137 }
2138
2139 /* Support for core dump NOTE sections. */
2140
2141 static bfd_boolean
2142 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2143 {
2144 int offset;
2145 unsigned int size;
2146
2147 switch (note->descsz)
2148 {
2149 default:
2150 return FALSE;
2151
2152 case 268: /* Linux/PPC. */
2153 /* pr_cursig */
2154 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
2155
2156 /* pr_pid */
2157 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
2158
2159 /* pr_reg */
2160 offset = 72;
2161 size = 192;
2162
2163 break;
2164 }
2165
2166 /* Make a ".reg/999" section. */
2167 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2168 size, note->descpos + offset);
2169 }
2170
2171 static bfd_boolean
2172 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2173 {
2174 switch (note->descsz)
2175 {
2176 default:
2177 return FALSE;
2178
2179 case 128: /* Linux/PPC elf_prpsinfo. */
2180 elf_tdata (abfd)->core_pid
2181 = bfd_get_32 (abfd, note->descdata + 16);
2182 elf_tdata (abfd)->core_program
2183 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2184 elf_tdata (abfd)->core_command
2185 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2186 }
2187
2188 /* Note that for some reason, a spurious space is tacked
2189 onto the end of the args in some (at least one anyway)
2190 implementations, so strip it off if it exists. */
2191
2192 {
2193 char *command = elf_tdata (abfd)->core_command;
2194 int n = strlen (command);
2195
2196 if (0 < n && command[n - 1] == ' ')
2197 command[n - 1] = '\0';
2198 }
2199
2200 return TRUE;
2201 }
2202
2203 static char *
2204 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2205 {
2206 switch (note_type)
2207 {
2208 default:
2209 return NULL;
2210
2211 case NT_PRPSINFO:
2212 {
2213 char data[128];
2214 va_list ap;
2215
2216 va_start (ap, note_type);
2217 memset (data, 0, sizeof (data));
2218 strncpy (data + 32, va_arg (ap, const char *), 16);
2219 strncpy (data + 48, va_arg (ap, const char *), 80);
2220 va_end (ap);
2221 return elfcore_write_note (abfd, buf, bufsiz,
2222 "CORE", note_type, data, sizeof (data));
2223 }
2224
2225 case NT_PRSTATUS:
2226 {
2227 char data[268];
2228 va_list ap;
2229 long pid;
2230 int cursig;
2231 const void *greg;
2232
2233 va_start (ap, note_type);
2234 memset (data, 0, 72);
2235 pid = va_arg (ap, long);
2236 bfd_put_32 (abfd, pid, data + 24);
2237 cursig = va_arg (ap, int);
2238 bfd_put_16 (abfd, cursig, data + 12);
2239 greg = va_arg (ap, const void *);
2240 memcpy (data + 72, greg, 192);
2241 memset (data + 264, 0, 4);
2242 va_end (ap);
2243 return elfcore_write_note (abfd, buf, bufsiz,
2244 "CORE", note_type, data, sizeof (data));
2245 }
2246 }
2247 }
2248
2249 static flagword
2250 ppc_elf_lookup_section_flags (char *flag_name)
2251 {
2252
2253 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2254 return SHF_PPC_VLE;
2255
2256 return 0;
2257 }
2258
2259 /* Add the VLE flag if required. */
2260
2261 bfd_boolean
2262 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2263 {
2264 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2265 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2266 shdr->sh_flags |= SHF_PPC_VLE;
2267
2268 return TRUE;
2269 }
2270
2271 /* Return address for Ith PLT stub in section PLT, for relocation REL
2272 or (bfd_vma) -1 if it should not be included. */
2273
2274 static bfd_vma
2275 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2276 const asection *plt ATTRIBUTE_UNUSED,
2277 const arelent *rel)
2278 {
2279 return rel->address;
2280 }
2281
2282 /* Handle a PowerPC specific section when reading an object file. This
2283 is called when bfd_section_from_shdr finds a section with an unknown
2284 type. */
2285
2286 static bfd_boolean
2287 ppc_elf_section_from_shdr (bfd *abfd,
2288 Elf_Internal_Shdr *hdr,
2289 const char *name,
2290 int shindex)
2291 {
2292 asection *newsect;
2293 flagword flags;
2294
2295 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2296 return FALSE;
2297
2298 newsect = hdr->bfd_section;
2299 flags = bfd_get_section_flags (abfd, newsect);
2300 if (hdr->sh_flags & SHF_EXCLUDE)
2301 flags |= SEC_EXCLUDE;
2302
2303 if (hdr->sh_type == SHT_ORDERED)
2304 flags |= SEC_SORT_ENTRIES;
2305
2306 bfd_set_section_flags (abfd, newsect, flags);
2307 return TRUE;
2308 }
2309
2310 /* Set up any other section flags and such that may be necessary. */
2311
2312 static bfd_boolean
2313 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2314 Elf_Internal_Shdr *shdr,
2315 asection *asect)
2316 {
2317 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2318 shdr->sh_type = SHT_ORDERED;
2319
2320 return TRUE;
2321 }
2322
2323 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2324 need to bump up the number of section headers. */
2325
2326 static int
2327 ppc_elf_additional_program_headers (bfd *abfd,
2328 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2329 {
2330 asection *s;
2331 int ret = 0;
2332
2333 s = bfd_get_section_by_name (abfd, ".sbss2");
2334 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2335 ++ret;
2336
2337 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2338 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2339 ++ret;
2340
2341 return ret;
2342 }
2343
2344 /* Modify the segment map for VLE executables. */
2345
2346 bfd_boolean
2347 ppc_elf_modify_segment_map (bfd *abfd,
2348 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2349 {
2350 struct elf_segment_map *m, *n;
2351 bfd_size_type amt;
2352 unsigned int j, k;
2353 bfd_boolean sect0_vle, sectj_vle;
2354
2355 /* At this point in the link, output sections have already been sorted by
2356 LMA and assigned to segments. All that is left to do is to ensure
2357 there is no mixing of VLE & non-VLE sections in a text segment.
2358 If we find that case, we split the segment.
2359 We maintain the original output section order. */
2360
2361 for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
2362 {
2363 if (m->count == 0)
2364 continue;
2365
2366 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2367 for (j = 1; j < m->count; ++j)
2368 {
2369 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2370
2371 if (sectj_vle != sect0_vle)
2372 break;
2373 }
2374 if (j >= m->count)
2375 continue;
2376
2377 /* sections 0..j-1 stay in this (current) segment,
2378 the remainder are put in a new segment.
2379 The scan resumes with the new segment. */
2380
2381 /* Fix the new segment. */
2382 amt = sizeof (struct elf_segment_map);
2383 amt += (m->count - j - 1) * sizeof (asection *);
2384 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2385 if (n == NULL)
2386 return FALSE;
2387
2388 n->p_type = PT_LOAD;
2389 n->p_flags = PF_X | PF_R;
2390 if (sectj_vle)
2391 n->p_flags |= PF_PPC_VLE;
2392 n->count = m->count - j;
2393 for (k = 0; k < n->count; ++k)
2394 {
2395 n->sections[k] = m->sections[j+k];
2396 m->sections[j+k] = NULL;
2397 }
2398 n->next = m->next;
2399 m->next = n;
2400
2401 /* Fix the current segment */
2402 m->count = j;
2403 }
2404
2405 return TRUE;
2406 }
2407
2408 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2409 .PPC.EMB.sbss0 a normal section, and not a bss section so
2410 that the linker doesn't crater when trying to make more than
2411 2 sections. */
2412
2413 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2414 {
2415 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2416 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2417 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2418 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2419 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2420 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2421 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2422 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2423 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2424 { NULL, 0, 0, 0, 0 }
2425 };
2426
2427 /* This is what we want for new plt/got. */
2428 static struct bfd_elf_special_section ppc_alt_plt =
2429 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2430
2431 static const struct bfd_elf_special_section *
2432 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2433 {
2434 const struct bfd_elf_special_section *ssect;
2435
2436 /* See if this is one of the special sections. */
2437 if (sec->name == NULL)
2438 return NULL;
2439
2440 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2441 sec->use_rela_p);
2442 if (ssect != NULL)
2443 {
2444 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2445 ssect = &ppc_alt_plt;
2446 return ssect;
2447 }
2448
2449 return _bfd_elf_get_sec_type_attr (abfd, sec);
2450 }
2451 \f
2452 /* Very simple linked list structure for recording apuinfo values. */
2453 typedef struct apuinfo_list
2454 {
2455 struct apuinfo_list *next;
2456 unsigned long value;
2457 }
2458 apuinfo_list;
2459
2460 static apuinfo_list *head;
2461 static bfd_boolean apuinfo_set;
2462
2463 static void
2464 apuinfo_list_init (void)
2465 {
2466 head = NULL;
2467 apuinfo_set = FALSE;
2468 }
2469
2470 static void
2471 apuinfo_list_add (unsigned long value)
2472 {
2473 apuinfo_list *entry = head;
2474
2475 while (entry != NULL)
2476 {
2477 if (entry->value == value)
2478 return;
2479 entry = entry->next;
2480 }
2481
2482 entry = bfd_malloc (sizeof (* entry));
2483 if (entry == NULL)
2484 return;
2485
2486 entry->value = value;
2487 entry->next = head;
2488 head = entry;
2489 }
2490
2491 static unsigned
2492 apuinfo_list_length (void)
2493 {
2494 apuinfo_list *entry;
2495 unsigned long count;
2496
2497 for (entry = head, count = 0;
2498 entry;
2499 entry = entry->next)
2500 ++ count;
2501
2502 return count;
2503 }
2504
2505 static inline unsigned long
2506 apuinfo_list_element (unsigned long number)
2507 {
2508 apuinfo_list * entry;
2509
2510 for (entry = head;
2511 entry && number --;
2512 entry = entry->next)
2513 ;
2514
2515 return entry ? entry->value : 0;
2516 }
2517
2518 static void
2519 apuinfo_list_finish (void)
2520 {
2521 apuinfo_list *entry;
2522
2523 for (entry = head; entry;)
2524 {
2525 apuinfo_list *next = entry->next;
2526 free (entry);
2527 entry = next;
2528 }
2529
2530 head = NULL;
2531 }
2532
2533 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2534 #define APUINFO_LABEL "APUinfo"
2535
2536 /* Scan the input BFDs and create a linked list of
2537 the APUinfo values that will need to be emitted. */
2538
2539 static void
2540 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2541 {
2542 bfd *ibfd;
2543 asection *asec;
2544 char *buffer = NULL;
2545 bfd_size_type largest_input_size = 0;
2546 unsigned i;
2547 unsigned long length;
2548 const char *error_message = NULL;
2549
2550 if (link_info == NULL)
2551 return;
2552
2553 apuinfo_list_init ();
2554
2555 /* Read in the input sections contents. */
2556 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2557 {
2558 unsigned long datum;
2559
2560 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2561 if (asec == NULL)
2562 continue;
2563
2564 error_message = _("corrupt %s section in %B");
2565 length = asec->size;
2566 if (length < 20)
2567 goto fail;
2568
2569 apuinfo_set = TRUE;
2570 if (largest_input_size < asec->size)
2571 {
2572 if (buffer)
2573 free (buffer);
2574 largest_input_size = asec->size;
2575 buffer = bfd_malloc (largest_input_size);
2576 if (!buffer)
2577 return;
2578 }
2579
2580 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2581 || (bfd_bread (buffer, length, ibfd) != length))
2582 {
2583 error_message = _("unable to read in %s section from %B");
2584 goto fail;
2585 }
2586
2587 /* Verify the contents of the header. Note - we have to
2588 extract the values this way in order to allow for a
2589 host whose endian-ness is different from the target. */
2590 datum = bfd_get_32 (ibfd, buffer);
2591 if (datum != sizeof APUINFO_LABEL)
2592 goto fail;
2593
2594 datum = bfd_get_32 (ibfd, buffer + 8);
2595 if (datum != 0x2)
2596 goto fail;
2597
2598 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2599 goto fail;
2600
2601 /* Get the number of bytes used for apuinfo entries. */
2602 datum = bfd_get_32 (ibfd, buffer + 4);
2603 if (datum + 20 != length)
2604 goto fail;
2605
2606 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2607 for (i = 0; i < datum; i += 4)
2608 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2609 }
2610
2611 error_message = NULL;
2612
2613 if (apuinfo_set)
2614 {
2615 /* Compute the size of the output section. */
2616 unsigned num_entries = apuinfo_list_length ();
2617
2618 /* Set the output section size, if it exists. */
2619 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2620
2621 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2622 {
2623 ibfd = abfd;
2624 error_message = _("warning: unable to set size of %s section in %B");
2625 }
2626 }
2627
2628 fail:
2629 if (buffer)
2630 free (buffer);
2631
2632 if (error_message)
2633 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2634 }
2635
2636 /* Prevent the output section from accumulating the input sections'
2637 contents. We have already stored this in our linked list structure. */
2638
2639 static bfd_boolean
2640 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2641 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2642 asection *asec,
2643 bfd_byte *contents ATTRIBUTE_UNUSED)
2644 {
2645 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2646 }
2647
2648 /* Finally we can generate the output section. */
2649
2650 static void
2651 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2652 {
2653 bfd_byte *buffer;
2654 asection *asec;
2655 unsigned i;
2656 unsigned num_entries;
2657 bfd_size_type length;
2658
2659 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2660 if (asec == NULL)
2661 return;
2662
2663 if (!apuinfo_set)
2664 return;
2665
2666 length = asec->size;
2667 if (length < 20)
2668 return;
2669
2670 buffer = bfd_malloc (length);
2671 if (buffer == NULL)
2672 {
2673 (*_bfd_error_handler)
2674 (_("failed to allocate space for new APUinfo section."));
2675 return;
2676 }
2677
2678 /* Create the apuinfo header. */
2679 num_entries = apuinfo_list_length ();
2680 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2681 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2682 bfd_put_32 (abfd, 0x2, buffer + 8);
2683 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2684
2685 length = 20;
2686 for (i = 0; i < num_entries; i++)
2687 {
2688 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2689 length += 4;
2690 }
2691
2692 if (length != asec->size)
2693 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2694
2695 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2696 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2697
2698 free (buffer);
2699
2700 apuinfo_list_finish ();
2701 }
2702 \f
2703 static bfd_boolean
2704 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2705 {
2706 bfd_byte buf[GLINK_ENTRY_SIZE];
2707
2708 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2709 return FALSE;
2710
2711 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2712 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2713 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2714 && bfd_get_32 (abfd, buf + 12) == BCTR);
2715 }
2716
2717 static bfd_boolean
2718 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2719 {
2720 bfd_vma vma = *(bfd_vma *) ptr;
2721 return ((section->flags & SEC_ALLOC) != 0
2722 && section->vma <= vma
2723 && vma < section->vma + section->size);
2724 }
2725
2726 static long
2727 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2728 long dynsymcount, asymbol **dynsyms,
2729 asymbol **ret)
2730 {
2731 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2732 asection *plt, *relplt, *dynamic, *glink;
2733 bfd_vma glink_vma = 0;
2734 bfd_vma resolv_vma = 0;
2735 bfd_vma stub_vma;
2736 asymbol *s;
2737 arelent *p;
2738 long count, i;
2739 size_t size;
2740 char *names;
2741 bfd_byte buf[4];
2742
2743 *ret = NULL;
2744
2745 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2746 return 0;
2747
2748 if (dynsymcount <= 0)
2749 return 0;
2750
2751 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2752 if (relplt == NULL)
2753 return 0;
2754
2755 plt = bfd_get_section_by_name (abfd, ".plt");
2756 if (plt == NULL)
2757 return 0;
2758
2759 /* Call common code to handle old-style executable PLTs. */
2760 if (elf_section_flags (plt) & SHF_EXECINSTR)
2761 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2762 dynsymcount, dynsyms, ret);
2763
2764 /* If this object was prelinked, the prelinker stored the address
2765 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2766 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2767 if (dynamic != NULL)
2768 {
2769 bfd_byte *dynbuf, *extdyn, *extdynend;
2770 size_t extdynsize;
2771 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2772
2773 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2774 return -1;
2775
2776 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2777 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2778
2779 extdyn = dynbuf;
2780 extdynend = extdyn + dynamic->size;
2781 for (; extdyn < extdynend; extdyn += extdynsize)
2782 {
2783 Elf_Internal_Dyn dyn;
2784 (*swap_dyn_in) (abfd, extdyn, &dyn);
2785
2786 if (dyn.d_tag == DT_NULL)
2787 break;
2788
2789 if (dyn.d_tag == DT_PPC_GOT)
2790 {
2791 unsigned int g_o_t = dyn.d_un.d_val;
2792 asection *got = bfd_get_section_by_name (abfd, ".got");
2793 if (got != NULL
2794 && bfd_get_section_contents (abfd, got, buf,
2795 g_o_t - got->vma + 4, 4))
2796 glink_vma = bfd_get_32 (abfd, buf);
2797 break;
2798 }
2799 }
2800 free (dynbuf);
2801 }
2802
2803 /* Otherwise we read the first plt entry. */
2804 if (glink_vma == 0)
2805 {
2806 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2807 glink_vma = bfd_get_32 (abfd, buf);
2808 }
2809
2810 if (glink_vma == 0)
2811 return 0;
2812
2813 /* The .glink section usually does not survive the final
2814 link; search for the section (usually .text) where the
2815 glink stubs now reside. */
2816 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2817 if (glink == NULL)
2818 return 0;
2819
2820 /* Determine glink PLT resolver by reading the relative branch
2821 from the first glink stub. */
2822 if (bfd_get_section_contents (abfd, glink, buf,
2823 glink_vma - glink->vma, 4))
2824 {
2825 unsigned int insn = bfd_get_32 (abfd, buf);
2826
2827 /* The first glink stub may either branch to the resolver ... */
2828 insn ^= B;
2829 if ((insn & ~0x3fffffc) == 0)
2830 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2831
2832 /* ... or fall through a bunch of NOPs. */
2833 else if ((insn ^ B ^ NOP) == 0)
2834 for (i = 4;
2835 bfd_get_section_contents (abfd, glink, buf,
2836 glink_vma - glink->vma + i, 4);
2837 i += 4)
2838 if (bfd_get_32 (abfd, buf) != NOP)
2839 {
2840 resolv_vma = glink_vma + i;
2841 break;
2842 }
2843 }
2844
2845 count = relplt->size / sizeof (Elf32_External_Rela);
2846 stub_vma = glink_vma - (bfd_vma) count * 16;
2847 /* If the stubs are those for -shared/-pie then we might have
2848 multiple stubs for each plt entry. If that is the case then
2849 there is no way to associate stubs with their plt entries short
2850 of figuring out the GOT pointer value used in the stub. */
2851 if (!is_nonpic_glink_stub (abfd, glink,
2852 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2853 return 0;
2854
2855 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2856 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2857 return -1;
2858
2859 size = count * sizeof (asymbol);
2860 p = relplt->relocation;
2861 for (i = 0; i < count; i++, p++)
2862 {
2863 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2864 if (p->addend != 0)
2865 size += sizeof ("+0x") - 1 + 8;
2866 }
2867
2868 size += sizeof (asymbol) + sizeof ("__glink");
2869
2870 if (resolv_vma)
2871 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2872
2873 s = *ret = bfd_malloc (size);
2874 if (s == NULL)
2875 return -1;
2876
2877 names = (char *) (s + count + 1 + (resolv_vma != 0));
2878 p = relplt->relocation;
2879 for (i = 0; i < count; i++, p++)
2880 {
2881 size_t len;
2882
2883 *s = **p->sym_ptr_ptr;
2884 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2885 we are defining a symbol, ensure one of them is set. */
2886 if ((s->flags & BSF_LOCAL) == 0)
2887 s->flags |= BSF_GLOBAL;
2888 s->flags |= BSF_SYNTHETIC;
2889 s->section = glink;
2890 s->value = stub_vma - glink->vma;
2891 s->name = names;
2892 s->udata.p = NULL;
2893 len = strlen ((*p->sym_ptr_ptr)->name);
2894 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2895 names += len;
2896 if (p->addend != 0)
2897 {
2898 memcpy (names, "+0x", sizeof ("+0x") - 1);
2899 names += sizeof ("+0x") - 1;
2900 bfd_sprintf_vma (abfd, names, p->addend);
2901 names += strlen (names);
2902 }
2903 memcpy (names, "@plt", sizeof ("@plt"));
2904 names += sizeof ("@plt");
2905 ++s;
2906 stub_vma += 16;
2907 }
2908
2909 /* Add a symbol at the start of the glink branch table. */
2910 memset (s, 0, sizeof *s);
2911 s->the_bfd = abfd;
2912 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2913 s->section = glink;
2914 s->value = glink_vma - glink->vma;
2915 s->name = names;
2916 memcpy (names, "__glink", sizeof ("__glink"));
2917 names += sizeof ("__glink");
2918 s++;
2919 count++;
2920
2921 if (resolv_vma)
2922 {
2923 /* Add a symbol for the glink PLT resolver. */
2924 memset (s, 0, sizeof *s);
2925 s->the_bfd = abfd;
2926 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2927 s->section = glink;
2928 s->value = resolv_vma - glink->vma;
2929 s->name = names;
2930 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2931 names += sizeof ("__glink_PLTresolve");
2932 s++;
2933 count++;
2934 }
2935
2936 return count;
2937 }
2938 \f
2939 /* The following functions are specific to the ELF linker, while
2940 functions above are used generally. They appear in this file more
2941 or less in the order in which they are called. eg.
2942 ppc_elf_check_relocs is called early in the link process,
2943 ppc_elf_finish_dynamic_sections is one of the last functions
2944 called. */
2945
2946 /* Track PLT entries needed for a given symbol. We might need more
2947 than one glink entry per symbol when generating a pic binary. */
2948 struct plt_entry
2949 {
2950 struct plt_entry *next;
2951
2952 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2953 This field stores the offset into .got2 used to initialise the
2954 GOT pointer reg. It will always be at least 32768. (Current
2955 gcc always uses an offset of 32768, but ld -r will pack .got2
2956 sections together resulting in larger offsets). */
2957 bfd_vma addend;
2958
2959 /* The .got2 section. */
2960 asection *sec;
2961
2962 /* PLT refcount or offset. */
2963 union
2964 {
2965 bfd_signed_vma refcount;
2966 bfd_vma offset;
2967 } plt;
2968
2969 /* .glink stub offset. */
2970 bfd_vma glink_offset;
2971 };
2972
2973 /* Of those relocs that might be copied as dynamic relocs, this function
2974 selects those that must be copied when linking a shared library,
2975 even when the symbol is local. */
2976
2977 static int
2978 must_be_dyn_reloc (struct bfd_link_info *info,
2979 enum elf_ppc_reloc_type r_type)
2980 {
2981 switch (r_type)
2982 {
2983 default:
2984 return 1;
2985
2986 case R_PPC_REL24:
2987 case R_PPC_REL14:
2988 case R_PPC_REL14_BRTAKEN:
2989 case R_PPC_REL14_BRNTAKEN:
2990 case R_PPC_REL32:
2991 return 0;
2992
2993 case R_PPC_TPREL32:
2994 case R_PPC_TPREL16:
2995 case R_PPC_TPREL16_LO:
2996 case R_PPC_TPREL16_HI:
2997 case R_PPC_TPREL16_HA:
2998 return !info->executable;
2999 }
3000 }
3001
3002 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3003 copying dynamic variables from a shared lib into an app's dynbss
3004 section, and instead use a dynamic relocation to point into the
3005 shared lib. */
3006 #define ELIMINATE_COPY_RELOCS 1
3007
3008 /* PPC ELF linker hash entry. */
3009
3010 struct ppc_elf_link_hash_entry
3011 {
3012 struct elf_link_hash_entry elf;
3013
3014 /* If this symbol is used in the linker created sections, the processor
3015 specific backend uses this field to map the field into the offset
3016 from the beginning of the section. */
3017 elf_linker_section_pointers_t *linker_section_pointer;
3018
3019 /* Track dynamic relocs copied for this symbol. */
3020 struct elf_dyn_relocs *dyn_relocs;
3021
3022 /* Contexts in which symbol is used in the GOT (or TOC).
3023 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3024 corresponding relocs are encountered during check_relocs.
3025 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3026 indicate the corresponding GOT entry type is not needed. */
3027 #define TLS_GD 1 /* GD reloc. */
3028 #define TLS_LD 2 /* LD reloc. */
3029 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3030 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3031 #define TLS_TLS 16 /* Any TLS reloc. */
3032 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3033 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3034 char tls_mask;
3035
3036 /* Nonzero if we have seen a small data relocation referring to this
3037 symbol. */
3038 unsigned char has_sda_refs;
3039 };
3040
3041 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3042
3043 /* PPC ELF linker hash table. */
3044
3045 struct ppc_elf_link_hash_table
3046 {
3047 struct elf_link_hash_table elf;
3048
3049 /* Short-cuts to get to dynamic linker sections. */
3050 asection *got;
3051 asection *relgot;
3052 asection *glink;
3053 asection *plt;
3054 asection *relplt;
3055 asection *iplt;
3056 asection *reliplt;
3057 asection *dynbss;
3058 asection *relbss;
3059 asection *dynsbss;
3060 asection *relsbss;
3061 elf_linker_section_t sdata[2];
3062 asection *sbss;
3063 asection *glink_eh_frame;
3064
3065 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3066 asection *srelplt2;
3067
3068 /* The .got.plt section (VxWorks only)*/
3069 asection *sgotplt;
3070
3071 /* Shortcut to __tls_get_addr. */
3072 struct elf_link_hash_entry *tls_get_addr;
3073
3074 /* The bfd that forced an old-style PLT. */
3075 bfd *old_bfd;
3076
3077 /* TLS local dynamic got entry handling. */
3078 union {
3079 bfd_signed_vma refcount;
3080 bfd_vma offset;
3081 } tlsld_got;
3082
3083 /* Offset of branch table to PltResolve function in glink. */
3084 bfd_vma glink_pltresolve;
3085
3086 /* Size of reserved GOT entries. */
3087 unsigned int got_header_size;
3088 /* Non-zero if allocating the header left a gap. */
3089 unsigned int got_gap;
3090
3091 /* The type of PLT we have chosen to use. */
3092 enum ppc_elf_plt_type plt_type;
3093
3094 /* Set if we should emit symbols for stubs. */
3095 unsigned int emit_stub_syms:1;
3096
3097 /* Set if __tls_get_addr optimization should not be done. */
3098 unsigned int no_tls_get_addr_opt:1;
3099
3100 /* True if the target system is VxWorks. */
3101 unsigned int is_vxworks:1;
3102
3103 /* The size of PLT entries. */
3104 int plt_entry_size;
3105 /* The distance between adjacent PLT slots. */
3106 int plt_slot_size;
3107 /* The size of the first PLT entry. */
3108 int plt_initial_entry_size;
3109
3110 /* Small local sym cache. */
3111 struct sym_cache sym_cache;
3112 };
3113
3114 /* Rename some of the generic section flags to better document how they
3115 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3116
3117 /* Nonzero if this section has TLS related relocations. */
3118 #define has_tls_reloc sec_flg0
3119
3120 /* Nonzero if this section has a call to __tls_get_addr. */
3121 #define has_tls_get_addr_call sec_flg1
3122
3123 /* Get the PPC ELF linker hash table from a link_info structure. */
3124
3125 #define ppc_elf_hash_table(p) \
3126 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3127 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3128
3129 /* Create an entry in a PPC ELF linker hash table. */
3130
3131 static struct bfd_hash_entry *
3132 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3133 struct bfd_hash_table *table,
3134 const char *string)
3135 {
3136 /* Allocate the structure if it has not already been allocated by a
3137 subclass. */
3138 if (entry == NULL)
3139 {
3140 entry = bfd_hash_allocate (table,
3141 sizeof (struct ppc_elf_link_hash_entry));
3142 if (entry == NULL)
3143 return entry;
3144 }
3145
3146 /* Call the allocation method of the superclass. */
3147 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3148 if (entry != NULL)
3149 {
3150 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3151 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3152 ppc_elf_hash_entry (entry)->tls_mask = 0;
3153 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3154 }
3155
3156 return entry;
3157 }
3158
3159 /* Create a PPC ELF linker hash table. */
3160
3161 static struct bfd_link_hash_table *
3162 ppc_elf_link_hash_table_create (bfd *abfd)
3163 {
3164 struct ppc_elf_link_hash_table *ret;
3165
3166 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3167 if (ret == NULL)
3168 return NULL;
3169
3170 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3171 ppc_elf_link_hash_newfunc,
3172 sizeof (struct ppc_elf_link_hash_entry),
3173 PPC32_ELF_DATA))
3174 {
3175 free (ret);
3176 return NULL;
3177 }
3178
3179 ret->elf.init_plt_refcount.refcount = 0;
3180 ret->elf.init_plt_refcount.glist = NULL;
3181 ret->elf.init_plt_offset.offset = 0;
3182 ret->elf.init_plt_offset.glist = NULL;
3183
3184 ret->sdata[0].name = ".sdata";
3185 ret->sdata[0].sym_name = "_SDA_BASE_";
3186 ret->sdata[0].bss_name = ".sbss";
3187
3188 ret->sdata[1].name = ".sdata2";
3189 ret->sdata[1].sym_name = "_SDA2_BASE_";
3190 ret->sdata[1].bss_name = ".sbss2";
3191
3192 ret->plt_entry_size = 12;
3193 ret->plt_slot_size = 8;
3194 ret->plt_initial_entry_size = 72;
3195
3196 return &ret->elf.root;
3197 }
3198
3199 /* Create .got and the related sections. */
3200
3201 static bfd_boolean
3202 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3203 {
3204 struct ppc_elf_link_hash_table *htab;
3205 asection *s;
3206 flagword flags;
3207
3208 if (!_bfd_elf_create_got_section (abfd, info))
3209 return FALSE;
3210
3211 htab = ppc_elf_hash_table (info);
3212 htab->got = s = bfd_get_linker_section (abfd, ".got");
3213 if (s == NULL)
3214 abort ();
3215
3216 if (htab->is_vxworks)
3217 {
3218 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3219 if (!htab->sgotplt)
3220 abort ();
3221 }
3222 else
3223 {
3224 /* The powerpc .got has a blrl instruction in it. Mark it
3225 executable. */
3226 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3227 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3228 if (!bfd_set_section_flags (abfd, s, flags))
3229 return FALSE;
3230 }
3231
3232 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3233 if (!htab->relgot)
3234 abort ();
3235
3236 return TRUE;
3237 }
3238
3239 static bfd_boolean
3240 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3241 {
3242 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3243 asection *s;
3244 flagword flags;
3245
3246 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3247 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3248 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3249 htab->glink = s;
3250 if (s == NULL
3251 || !bfd_set_section_alignment (abfd, s, 4))
3252 return FALSE;
3253
3254 if (!info->no_ld_generated_unwind_info)
3255 {
3256 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3257 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3258 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3259 htab->glink_eh_frame = s;
3260 if (s == NULL
3261 || !bfd_set_section_alignment (abfd, s, 2))
3262 return FALSE;
3263 }
3264
3265 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3266 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3267 htab->iplt = s;
3268 if (s == NULL
3269 || !bfd_set_section_alignment (abfd, s, 4))
3270 return FALSE;
3271
3272 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3273 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3274 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3275 htab->reliplt = s;
3276 if (s == NULL
3277 || ! bfd_set_section_alignment (abfd, s, 2))
3278 return FALSE;
3279 return TRUE;
3280 }
3281
3282 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3283 to output sections (just like _bfd_elf_create_dynamic_sections has
3284 to create .dynbss and .rela.bss). */
3285
3286 static bfd_boolean
3287 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3288 {
3289 struct ppc_elf_link_hash_table *htab;
3290 asection *s;
3291 flagword flags;
3292
3293 htab = ppc_elf_hash_table (info);
3294
3295 if (htab->got == NULL
3296 && !ppc_elf_create_got (abfd, info))
3297 return FALSE;
3298
3299 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3300 return FALSE;
3301
3302 if (htab->glink == NULL
3303 && !ppc_elf_create_glink (abfd, info))
3304 return FALSE;
3305
3306 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3307 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3308 SEC_ALLOC | SEC_LINKER_CREATED);
3309 htab->dynsbss = s;
3310 if (s == NULL)
3311 return FALSE;
3312
3313 if (! info->shared)
3314 {
3315 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3316 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3317 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3318 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3319 htab->relsbss = s;
3320 if (s == NULL
3321 || ! bfd_set_section_alignment (abfd, s, 2))
3322 return FALSE;
3323 }
3324
3325 if (htab->is_vxworks
3326 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3327 return FALSE;
3328
3329 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3330 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3331 if (s == NULL)
3332 abort ();
3333
3334 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3335 if (htab->plt_type == PLT_VXWORKS)
3336 /* The VxWorks PLT is a loaded section with contents. */
3337 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3338 return bfd_set_section_flags (abfd, s, flags);
3339 }
3340
3341 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3342
3343 static void
3344 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3345 struct elf_link_hash_entry *dir,
3346 struct elf_link_hash_entry *ind)
3347 {
3348 struct ppc_elf_link_hash_entry *edir, *eind;
3349
3350 edir = (struct ppc_elf_link_hash_entry *) dir;
3351 eind = (struct ppc_elf_link_hash_entry *) ind;
3352
3353 edir->tls_mask |= eind->tls_mask;
3354 edir->has_sda_refs |= eind->has_sda_refs;
3355
3356 /* If called to transfer flags for a weakdef during processing
3357 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3358 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3359 if (!(ELIMINATE_COPY_RELOCS
3360 && eind->elf.root.type != bfd_link_hash_indirect
3361 && edir->elf.dynamic_adjusted))
3362 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3363
3364 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3365 edir->elf.ref_regular |= eind->elf.ref_regular;
3366 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3367 edir->elf.needs_plt |= eind->elf.needs_plt;
3368 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3369
3370 if (eind->dyn_relocs != NULL)
3371 {
3372 if (edir->dyn_relocs != NULL)
3373 {
3374 struct elf_dyn_relocs **pp;
3375 struct elf_dyn_relocs *p;
3376
3377 /* Add reloc counts against the indirect sym to the direct sym
3378 list. Merge any entries against the same section. */
3379 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3380 {
3381 struct elf_dyn_relocs *q;
3382
3383 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3384 if (q->sec == p->sec)
3385 {
3386 q->pc_count += p->pc_count;
3387 q->count += p->count;
3388 *pp = p->next;
3389 break;
3390 }
3391 if (q == NULL)
3392 pp = &p->next;
3393 }
3394 *pp = edir->dyn_relocs;
3395 }
3396
3397 edir->dyn_relocs = eind->dyn_relocs;
3398 eind->dyn_relocs = NULL;
3399 }
3400
3401 /* If we were called to copy over info for a weak sym, that's all.
3402 You might think dyn_relocs need not be copied over; After all,
3403 both syms will be dynamic or both non-dynamic so we're just
3404 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3405 code in ppc_elf_adjust_dynamic_symbol needs to check for
3406 dyn_relocs in read-only sections, and it does so on what is the
3407 DIR sym here. */
3408 if (eind->elf.root.type != bfd_link_hash_indirect)
3409 return;
3410
3411 /* Copy over the GOT refcount entries that we may have already seen to
3412 the symbol which just became indirect. */
3413 edir->elf.got.refcount += eind->elf.got.refcount;
3414 eind->elf.got.refcount = 0;
3415
3416 /* And plt entries. */
3417 if (eind->elf.plt.plist != NULL)
3418 {
3419 if (edir->elf.plt.plist != NULL)
3420 {
3421 struct plt_entry **entp;
3422 struct plt_entry *ent;
3423
3424 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3425 {
3426 struct plt_entry *dent;
3427
3428 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3429 if (dent->sec == ent->sec && dent->addend == ent->addend)
3430 {
3431 dent->plt.refcount += ent->plt.refcount;
3432 *entp = ent->next;
3433 break;
3434 }
3435 if (dent == NULL)
3436 entp = &ent->next;
3437 }
3438 *entp = edir->elf.plt.plist;
3439 }
3440
3441 edir->elf.plt.plist = eind->elf.plt.plist;
3442 eind->elf.plt.plist = NULL;
3443 }
3444
3445 if (eind->elf.dynindx != -1)
3446 {
3447 if (edir->elf.dynindx != -1)
3448 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3449 edir->elf.dynstr_index);
3450 edir->elf.dynindx = eind->elf.dynindx;
3451 edir->elf.dynstr_index = eind->elf.dynstr_index;
3452 eind->elf.dynindx = -1;
3453 eind->elf.dynstr_index = 0;
3454 }
3455 }
3456
3457 /* Hook called by the linker routine which adds symbols from an object
3458 file. We use it to put .comm items in .sbss, and not .bss. */
3459
3460 static bfd_boolean
3461 ppc_elf_add_symbol_hook (bfd *abfd,
3462 struct bfd_link_info *info,
3463 Elf_Internal_Sym *sym,
3464 const char **namep ATTRIBUTE_UNUSED,
3465 flagword *flagsp ATTRIBUTE_UNUSED,
3466 asection **secp,
3467 bfd_vma *valp)
3468 {
3469 if (sym->st_shndx == SHN_COMMON
3470 && !info->relocatable
3471 && is_ppc_elf (info->output_bfd)
3472 && sym->st_size <= elf_gp_size (abfd))
3473 {
3474 /* Common symbols less than or equal to -G nn bytes are automatically
3475 put into .sbss. */
3476 struct ppc_elf_link_hash_table *htab;
3477
3478 htab = ppc_elf_hash_table (info);
3479 if (htab->sbss == NULL)
3480 {
3481 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3482
3483 if (!htab->elf.dynobj)
3484 htab->elf.dynobj = abfd;
3485
3486 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3487 ".sbss",
3488 flags);
3489 if (htab->sbss == NULL)
3490 return FALSE;
3491 }
3492
3493 *secp = htab->sbss;
3494 *valp = sym->st_size;
3495 }
3496
3497 if ((abfd->flags & DYNAMIC) == 0
3498 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3499 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3500 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3501
3502 return TRUE;
3503 }
3504 \f
3505 static bfd_boolean
3506 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3507 {
3508 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3509
3510 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3511 TRUE, FALSE, TRUE);
3512 if (lsect->sym == NULL)
3513 return FALSE;
3514 if (lsect->sym->root.type == bfd_link_hash_new)
3515 lsect->sym->non_elf = 0;
3516 lsect->sym->ref_regular = 1;
3517 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3518 return TRUE;
3519 }
3520
3521 /* Create a special linker section. */
3522
3523 static bfd_boolean
3524 ppc_elf_create_linker_section (bfd *abfd,
3525 struct bfd_link_info *info,
3526 flagword flags,
3527 elf_linker_section_t *lsect)
3528 {
3529 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3530 asection *s;
3531
3532 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3533 | SEC_LINKER_CREATED);
3534
3535 /* Record the first bfd that needs the special sections. */
3536 if (!htab->elf.dynobj)
3537 htab->elf.dynobj = abfd;
3538
3539 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3540 lsect->name,
3541 flags);
3542 if (s == NULL
3543 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3544 return FALSE;
3545 lsect->section = s;
3546
3547 return create_sdata_sym (info, lsect);
3548 }
3549
3550 /* Find a linker generated pointer with a given addend and type. */
3551
3552 static elf_linker_section_pointers_t *
3553 elf_find_pointer_linker_section
3554 (elf_linker_section_pointers_t *linker_pointers,
3555 bfd_vma addend,
3556 elf_linker_section_t *lsect)
3557 {
3558 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3559 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3560 return linker_pointers;
3561
3562 return NULL;
3563 }
3564
3565 /* Allocate a pointer to live in a linker created section. */
3566
3567 static bfd_boolean
3568 elf_create_pointer_linker_section (bfd *abfd,
3569 elf_linker_section_t *lsect,
3570 struct elf_link_hash_entry *h,
3571 const Elf_Internal_Rela *rel)
3572 {
3573 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3574 elf_linker_section_pointers_t *linker_section_ptr;
3575 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3576 bfd_size_type amt;
3577
3578 BFD_ASSERT (lsect != NULL);
3579
3580 /* Is this a global symbol? */
3581 if (h != NULL)
3582 {
3583 struct ppc_elf_link_hash_entry *eh;
3584
3585 /* Has this symbol already been allocated? If so, our work is done. */
3586 eh = (struct ppc_elf_link_hash_entry *) h;
3587 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3588 rel->r_addend,
3589 lsect))
3590 return TRUE;
3591
3592 ptr_linker_section_ptr = &eh->linker_section_pointer;
3593 }
3594 else
3595 {
3596 BFD_ASSERT (is_ppc_elf (abfd));
3597
3598 /* Allocation of a pointer to a local symbol. */
3599 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3600
3601 /* Allocate a table to hold the local symbols if first time. */
3602 if (!ptr)
3603 {
3604 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3605
3606 amt = num_symbols;
3607 amt *= sizeof (elf_linker_section_pointers_t *);
3608 ptr = bfd_zalloc (abfd, amt);
3609
3610 if (!ptr)
3611 return FALSE;
3612
3613 elf_local_ptr_offsets (abfd) = ptr;
3614 }
3615
3616 /* Has this symbol already been allocated? If so, our work is done. */
3617 if (elf_find_pointer_linker_section (ptr[r_symndx],
3618 rel->r_addend,
3619 lsect))
3620 return TRUE;
3621
3622 ptr_linker_section_ptr = &ptr[r_symndx];
3623 }
3624
3625 /* Allocate space for a pointer in the linker section, and allocate
3626 a new pointer record from internal memory. */
3627 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3628 amt = sizeof (elf_linker_section_pointers_t);
3629 linker_section_ptr = bfd_alloc (abfd, amt);
3630
3631 if (!linker_section_ptr)
3632 return FALSE;
3633
3634 linker_section_ptr->next = *ptr_linker_section_ptr;
3635 linker_section_ptr->addend = rel->r_addend;
3636 linker_section_ptr->lsect = lsect;
3637 *ptr_linker_section_ptr = linker_section_ptr;
3638
3639 linker_section_ptr->offset = lsect->section->size;
3640 lsect->section->size += 4;
3641
3642 #ifdef DEBUG
3643 fprintf (stderr,
3644 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3645 lsect->name, (long) linker_section_ptr->offset,
3646 (long) lsect->section->size);
3647 #endif
3648
3649 return TRUE;
3650 }
3651
3652 static struct plt_entry **
3653 update_local_sym_info (bfd *abfd,
3654 Elf_Internal_Shdr *symtab_hdr,
3655 unsigned long r_symndx,
3656 int tls_type)
3657 {
3658 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3659 struct plt_entry **local_plt;
3660 char *local_got_tls_masks;
3661
3662 if (local_got_refcounts == NULL)
3663 {
3664 bfd_size_type size = symtab_hdr->sh_info;
3665
3666 size *= (sizeof (*local_got_refcounts)
3667 + sizeof (*local_plt)
3668 + sizeof (*local_got_tls_masks));
3669 local_got_refcounts = bfd_zalloc (abfd, size);
3670 if (local_got_refcounts == NULL)
3671 return NULL;
3672 elf_local_got_refcounts (abfd) = local_got_refcounts;
3673 }
3674
3675 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3676 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3677 local_got_tls_masks[r_symndx] |= tls_type;
3678 if (tls_type != PLT_IFUNC)
3679 local_got_refcounts[r_symndx] += 1;
3680 return local_plt + r_symndx;
3681 }
3682
3683 static bfd_boolean
3684 update_plt_info (bfd *abfd, struct plt_entry **plist,
3685 asection *sec, bfd_vma addend)
3686 {
3687 struct plt_entry *ent;
3688
3689 if (addend < 32768)
3690 sec = NULL;
3691 for (ent = *plist; ent != NULL; ent = ent->next)
3692 if (ent->sec == sec && ent->addend == addend)
3693 break;
3694 if (ent == NULL)
3695 {
3696 bfd_size_type amt = sizeof (*ent);
3697 ent = bfd_alloc (abfd, amt);
3698 if (ent == NULL)
3699 return FALSE;
3700 ent->next = *plist;
3701 ent->sec = sec;
3702 ent->addend = addend;
3703 ent->plt.refcount = 0;
3704 *plist = ent;
3705 }
3706 ent->plt.refcount += 1;
3707 return TRUE;
3708 }
3709
3710 static struct plt_entry *
3711 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3712 {
3713 struct plt_entry *ent;
3714
3715 if (addend < 32768)
3716 sec = NULL;
3717 for (ent = *plist; ent != NULL; ent = ent->next)
3718 if (ent->sec == sec && ent->addend == addend)
3719 break;
3720 return ent;
3721 }
3722
3723 static bfd_boolean
3724 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3725 {
3726 return (r_type == R_PPC_PLTREL24
3727 || r_type == R_PPC_LOCAL24PC
3728 || r_type == R_PPC_REL24
3729 || r_type == R_PPC_REL14
3730 || r_type == R_PPC_REL14_BRTAKEN
3731 || r_type == R_PPC_REL14_BRNTAKEN
3732 || r_type == R_PPC_ADDR24
3733 || r_type == R_PPC_ADDR14
3734 || r_type == R_PPC_ADDR14_BRTAKEN
3735 || r_type == R_PPC_ADDR14_BRNTAKEN);
3736 }
3737
3738 static void
3739 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3740 {
3741 (*_bfd_error_handler)
3742 (_("%B: relocation %s cannot be used when making a shared object"),
3743 abfd,
3744 ppc_elf_howto_table[r_type]->name);
3745 bfd_set_error (bfd_error_bad_value);
3746 }
3747
3748 /* Look through the relocs for a section during the first phase, and
3749 allocate space in the global offset table or procedure linkage
3750 table. */
3751
3752 static bfd_boolean
3753 ppc_elf_check_relocs (bfd *abfd,
3754 struct bfd_link_info *info,
3755 asection *sec,
3756 const Elf_Internal_Rela *relocs)
3757 {
3758 struct ppc_elf_link_hash_table *htab;
3759 Elf_Internal_Shdr *symtab_hdr;
3760 struct elf_link_hash_entry **sym_hashes;
3761 const Elf_Internal_Rela *rel;
3762 const Elf_Internal_Rela *rel_end;
3763 asection *got2, *sreloc;
3764 struct elf_link_hash_entry *tga;
3765
3766 if (info->relocatable)
3767 return TRUE;
3768
3769 /* Don't do anything special with non-loaded, non-alloced sections.
3770 In particular, any relocs in such sections should not affect GOT
3771 and PLT reference counting (ie. we don't allow them to create GOT
3772 or PLT entries), there's no possibility or desire to optimize TLS
3773 relocs, and there's not much point in propagating relocs to shared
3774 libs that the dynamic linker won't relocate. */
3775 if ((sec->flags & SEC_ALLOC) == 0)
3776 return TRUE;
3777
3778 #ifdef DEBUG
3779 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3780 sec, abfd);
3781 #endif
3782
3783 BFD_ASSERT (is_ppc_elf (abfd));
3784
3785 /* Initialize howto table if not already done. */
3786 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3787 ppc_elf_howto_init ();
3788
3789 htab = ppc_elf_hash_table (info);
3790 if (htab->glink == NULL)
3791 {
3792 if (htab->elf.dynobj == NULL)
3793 htab->elf.dynobj = abfd;
3794 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3795 return FALSE;
3796 }
3797 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3798 FALSE, FALSE, TRUE);
3799 symtab_hdr = &elf_symtab_hdr (abfd);
3800 sym_hashes = elf_sym_hashes (abfd);
3801 got2 = bfd_get_section_by_name (abfd, ".got2");
3802 sreloc = NULL;
3803
3804 rel_end = relocs + sec->reloc_count;
3805 for (rel = relocs; rel < rel_end; rel++)
3806 {
3807 unsigned long r_symndx;
3808 enum elf_ppc_reloc_type r_type;
3809 struct elf_link_hash_entry *h;
3810 int tls_type;
3811
3812 r_symndx = ELF32_R_SYM (rel->r_info);
3813 if (r_symndx < symtab_hdr->sh_info)
3814 h = NULL;
3815 else
3816 {
3817 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3818 while (h->root.type == bfd_link_hash_indirect
3819 || h->root.type == bfd_link_hash_warning)
3820 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3821 }
3822
3823 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3824 This shows up in particular in an R_PPC_ADDR32 in the eabi
3825 startup code. */
3826 if (h != NULL
3827 && htab->got == NULL
3828 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3829 {
3830 if (htab->elf.dynobj == NULL)
3831 htab->elf.dynobj = abfd;
3832 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3833 return FALSE;
3834 BFD_ASSERT (h == htab->elf.hgot);
3835 }
3836
3837 tls_type = 0;
3838 r_type = ELF32_R_TYPE (rel->r_info);
3839 if (h == NULL && !htab->is_vxworks)
3840 {
3841 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3842 abfd, r_symndx);
3843 if (isym == NULL)
3844 return FALSE;
3845
3846 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
3847 && (!info->shared
3848 || is_branch_reloc (r_type)))
3849 {
3850 struct plt_entry **ifunc;
3851 bfd_vma addend;
3852
3853 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3854 PLT_IFUNC);
3855 if (ifunc == NULL)
3856 return FALSE;
3857
3858 /* STT_GNU_IFUNC symbols must have a PLT entry;
3859 In a non-pie executable even when there are
3860 no plt calls. */
3861 addend = 0;
3862 if (r_type == R_PPC_PLTREL24)
3863 {
3864 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3865 if (info->shared)
3866 addend = rel->r_addend;
3867 }
3868 if (!update_plt_info (abfd, ifunc, got2, addend))
3869 return FALSE;
3870 }
3871 }
3872
3873 if (!htab->is_vxworks
3874 && is_branch_reloc (r_type)
3875 && h != NULL
3876 && h == tga)
3877 {
3878 if (rel != relocs
3879 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3880 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3881 /* We have a new-style __tls_get_addr call with a marker
3882 reloc. */
3883 ;
3884 else
3885 /* Mark this section as having an old-style call. */
3886 sec->has_tls_get_addr_call = 1;
3887 }
3888
3889 switch (r_type)
3890 {
3891 case R_PPC_TLSGD:
3892 case R_PPC_TLSLD:
3893 /* These special tls relocs tie a call to __tls_get_addr with
3894 its parameter symbol. */
3895 break;
3896
3897 case R_PPC_GOT_TLSLD16:
3898 case R_PPC_GOT_TLSLD16_LO:
3899 case R_PPC_GOT_TLSLD16_HI:
3900 case R_PPC_GOT_TLSLD16_HA:
3901 tls_type = TLS_TLS | TLS_LD;
3902 goto dogottls;
3903
3904 case R_PPC_GOT_TLSGD16:
3905 case R_PPC_GOT_TLSGD16_LO:
3906 case R_PPC_GOT_TLSGD16_HI:
3907 case R_PPC_GOT_TLSGD16_HA:
3908 tls_type = TLS_TLS | TLS_GD;
3909 goto dogottls;
3910
3911 case R_PPC_GOT_TPREL16:
3912 case R_PPC_GOT_TPREL16_LO:
3913 case R_PPC_GOT_TPREL16_HI:
3914 case R_PPC_GOT_TPREL16_HA:
3915 if (!info->executable)
3916 info->flags |= DF_STATIC_TLS;
3917 tls_type = TLS_TLS | TLS_TPREL;
3918 goto dogottls;
3919
3920 case R_PPC_GOT_DTPREL16:
3921 case R_PPC_GOT_DTPREL16_LO:
3922 case R_PPC_GOT_DTPREL16_HI:
3923 case R_PPC_GOT_DTPREL16_HA:
3924 tls_type = TLS_TLS | TLS_DTPREL;
3925 dogottls:
3926 sec->has_tls_reloc = 1;
3927 /* Fall thru */
3928
3929 /* GOT16 relocations */
3930 case R_PPC_GOT16:
3931 case R_PPC_GOT16_LO:
3932 case R_PPC_GOT16_HI:
3933 case R_PPC_GOT16_HA:
3934 /* This symbol requires a global offset table entry. */
3935 if (htab->got == NULL)
3936 {
3937 if (htab->elf.dynobj == NULL)
3938 htab->elf.dynobj = abfd;
3939 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3940 return FALSE;
3941 }
3942 if (h != NULL)
3943 {
3944 h->got.refcount += 1;
3945 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3946 }
3947 else
3948 /* This is a global offset table entry for a local symbol. */
3949 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3950 return FALSE;
3951
3952 /* We may also need a plt entry if the symbol turns out to be
3953 an ifunc. */
3954 if (h != NULL && !info->shared)
3955 {
3956 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
3957 return FALSE;
3958 }
3959 break;
3960
3961 /* Indirect .sdata relocation. */
3962 case R_PPC_EMB_SDAI16:
3963 if (info->shared)
3964 {
3965 bad_shared_reloc (abfd, r_type);
3966 return FALSE;
3967 }
3968 if (htab->sdata[0].section == NULL
3969 && !ppc_elf_create_linker_section (abfd, info, 0,
3970 &htab->sdata[0]))
3971 return FALSE;
3972 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3973 h, rel))
3974 return FALSE;
3975 if (h != NULL)
3976 {
3977 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3978 h->non_got_ref = TRUE;
3979 }
3980 break;
3981
3982 /* Indirect .sdata2 relocation. */
3983 case R_PPC_EMB_SDA2I16:
3984 if (info->shared)
3985 {
3986 bad_shared_reloc (abfd, r_type);
3987 return FALSE;
3988 }
3989 if (htab->sdata[1].section == NULL
3990 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3991 &htab->sdata[1]))
3992 return FALSE;
3993 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3994 h, rel))
3995 return FALSE;
3996 if (h != NULL)
3997 {
3998 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3999 h->non_got_ref = TRUE;
4000 }
4001 break;
4002
4003 case R_PPC_VLE_SDAREL_LO16A:
4004 case R_PPC_VLE_SDAREL_LO16D:
4005 case R_PPC_VLE_SDAREL_HI16A:
4006 case R_PPC_VLE_SDAREL_HI16D:
4007 case R_PPC_VLE_SDAREL_HA16A:
4008 case R_PPC_VLE_SDAREL_HA16D:
4009 case R_PPC_SDAREL16:
4010 if (htab->sdata[0].sym == NULL
4011 && !create_sdata_sym (info, &htab->sdata[0]))
4012 return FALSE;
4013
4014 if (htab->sdata[1].sym == NULL
4015 && !create_sdata_sym (info, &htab->sdata[1]))
4016 return FALSE;
4017
4018 if (h != NULL)
4019 {
4020 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4021 h->non_got_ref = TRUE;
4022 }
4023 break;
4024
4025 case R_PPC_VLE_REL8:
4026 case R_PPC_VLE_REL15:
4027 case R_PPC_VLE_REL24:
4028 case R_PPC_VLE_LO16A:
4029 case R_PPC_VLE_LO16D:
4030 case R_PPC_VLE_HI16A:
4031 case R_PPC_VLE_HI16D:
4032 case R_PPC_VLE_HA16A:
4033 case R_PPC_VLE_HA16D:
4034 break;
4035
4036 case R_PPC_EMB_SDA2REL:
4037 if (info->shared)
4038 {
4039 bad_shared_reloc (abfd, r_type);
4040 return FALSE;
4041 }
4042 if (htab->sdata[1].sym == NULL
4043 && !create_sdata_sym (info, &htab->sdata[1]))
4044 return FALSE;
4045 if (h != NULL)
4046 {
4047 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4048 h->non_got_ref = TRUE;
4049 }
4050 break;
4051
4052 case R_PPC_VLE_SDA21_LO:
4053 case R_PPC_VLE_SDA21:
4054 case R_PPC_EMB_SDA21:
4055 case R_PPC_EMB_RELSDA:
4056 if (info->shared)
4057 {
4058 bad_shared_reloc (abfd, r_type);
4059 return FALSE;
4060 }
4061 if (htab->sdata[0].sym == NULL
4062 && !create_sdata_sym (info, &htab->sdata[0]))
4063 return FALSE;
4064 if (htab->sdata[1].sym == NULL
4065 && !create_sdata_sym (info, &htab->sdata[1]))
4066 return FALSE;
4067 if (h != NULL)
4068 {
4069 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4070 h->non_got_ref = TRUE;
4071 }
4072 break;
4073
4074 case R_PPC_EMB_NADDR32:
4075 case R_PPC_EMB_NADDR16:
4076 case R_PPC_EMB_NADDR16_LO:
4077 case R_PPC_EMB_NADDR16_HI:
4078 case R_PPC_EMB_NADDR16_HA:
4079 if (info->shared)
4080 {
4081 bad_shared_reloc (abfd, r_type);
4082 return FALSE;
4083 }
4084 if (h != NULL)
4085 h->non_got_ref = TRUE;
4086 break;
4087
4088 case R_PPC_PLTREL24:
4089 if (h == NULL)
4090 break;
4091 /* Fall through */
4092 case R_PPC_PLT32:
4093 case R_PPC_PLTREL32:
4094 case R_PPC_PLT16_LO:
4095 case R_PPC_PLT16_HI:
4096 case R_PPC_PLT16_HA:
4097 #ifdef DEBUG
4098 fprintf (stderr, "Reloc requires a PLT entry\n");
4099 #endif
4100 /* This symbol requires a procedure linkage table entry. We
4101 actually build the entry in finish_dynamic_symbol,
4102 because this might be a case of linking PIC code without
4103 linking in any dynamic objects, in which case we don't
4104 need to generate a procedure linkage table after all. */
4105
4106 if (h == NULL)
4107 {
4108 /* It does not make sense to have a procedure linkage
4109 table entry for a local symbol. */
4110 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4111 abfd, sec, rel->r_offset,
4112 ppc_elf_howto_table[r_type]->name);
4113 bfd_set_error (bfd_error_bad_value);
4114 return FALSE;
4115 }
4116 else
4117 {
4118 bfd_vma addend = 0;
4119
4120 if (r_type == R_PPC_PLTREL24)
4121 {
4122 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4123 if (info->shared)
4124 addend = rel->r_addend;
4125 }
4126 h->needs_plt = 1;
4127 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4128 return FALSE;
4129 }
4130 break;
4131
4132 /* The following relocations don't need to propagate the
4133 relocation if linking a shared object since they are
4134 section relative. */
4135 case R_PPC_SECTOFF:
4136 case R_PPC_SECTOFF_LO:
4137 case R_PPC_SECTOFF_HI:
4138 case R_PPC_SECTOFF_HA:
4139 case R_PPC_DTPREL16:
4140 case R_PPC_DTPREL16_LO:
4141 case R_PPC_DTPREL16_HI:
4142 case R_PPC_DTPREL16_HA:
4143 case R_PPC_TOC16:
4144 break;
4145
4146 case R_PPC_REL16:
4147 case R_PPC_REL16_LO:
4148 case R_PPC_REL16_HI:
4149 case R_PPC_REL16_HA:
4150 ppc_elf_tdata (abfd)->has_rel16 = 1;
4151 break;
4152
4153 /* These are just markers. */
4154 case R_PPC_TLS:
4155 case R_PPC_EMB_MRKREF:
4156 case R_PPC_NONE:
4157 case R_PPC_max:
4158 case R_PPC_RELAX:
4159 case R_PPC_RELAX_PLT:
4160 case R_PPC_RELAX_PLTREL24:
4161 break;
4162
4163 /* These should only appear in dynamic objects. */
4164 case R_PPC_COPY:
4165 case R_PPC_GLOB_DAT:
4166 case R_PPC_JMP_SLOT:
4167 case R_PPC_RELATIVE:
4168 case R_PPC_IRELATIVE:
4169 break;
4170
4171 /* These aren't handled yet. We'll report an error later. */
4172 case R_PPC_ADDR30:
4173 case R_PPC_EMB_RELSEC16:
4174 case R_PPC_EMB_RELST_LO:
4175 case R_PPC_EMB_RELST_HI:
4176 case R_PPC_EMB_RELST_HA:
4177 case R_PPC_EMB_BIT_FLD:
4178 break;
4179
4180 /* This refers only to functions defined in the shared library. */
4181 case R_PPC_LOCAL24PC:
4182 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4183 {
4184 htab->plt_type = PLT_OLD;
4185 htab->old_bfd = abfd;
4186 }
4187 break;
4188
4189 /* This relocation describes the C++ object vtable hierarchy.
4190 Reconstruct it for later use during GC. */
4191 case R_PPC_GNU_VTINHERIT:
4192 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4193 return FALSE;
4194 break;
4195
4196 /* This relocation describes which C++ vtable entries are actually
4197 used. Record for later use during GC. */
4198 case R_PPC_GNU_VTENTRY:
4199 BFD_ASSERT (h != NULL);
4200 if (h != NULL
4201 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4202 return FALSE;
4203 break;
4204
4205 /* We shouldn't really be seeing these. */
4206 case R_PPC_TPREL32:
4207 case R_PPC_TPREL16:
4208 case R_PPC_TPREL16_LO:
4209 case R_PPC_TPREL16_HI:
4210 case R_PPC_TPREL16_HA:
4211 if (!info->executable)
4212 info->flags |= DF_STATIC_TLS;
4213 goto dodyn;
4214
4215 /* Nor these. */
4216 case R_PPC_DTPMOD32:
4217 case R_PPC_DTPREL32:
4218 goto dodyn;
4219
4220 case R_PPC_REL32:
4221 if (h == NULL
4222 && got2 != NULL
4223 && (sec->flags & SEC_CODE) != 0
4224 && info->shared
4225 && htab->plt_type == PLT_UNSET)
4226 {
4227 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4228 the start of a function, which assembles to a REL32
4229 reference to .got2. If we detect one of these, then
4230 force the old PLT layout because the linker cannot
4231 reliably deduce the GOT pointer value needed for
4232 PLT call stubs. */
4233 asection *s;
4234 Elf_Internal_Sym *isym;
4235
4236 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4237 abfd, r_symndx);
4238 if (isym == NULL)
4239 return FALSE;
4240
4241 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4242 if (s == got2)
4243 {
4244 htab->plt_type = PLT_OLD;
4245 htab->old_bfd = abfd;
4246 }
4247 }
4248 if (h == NULL || h == htab->elf.hgot)
4249 break;
4250 /* fall through */
4251
4252 case R_PPC_ADDR32:
4253 case R_PPC_ADDR16:
4254 case R_PPC_ADDR16_LO:
4255 case R_PPC_ADDR16_HI:
4256 case R_PPC_ADDR16_HA:
4257 case R_PPC_UADDR32:
4258 case R_PPC_UADDR16:
4259 if (h != NULL && !info->shared)
4260 {
4261 /* We may need a plt entry if the symbol turns out to be
4262 a function defined in a dynamic object. */
4263 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4264 return FALSE;
4265
4266 /* We may need a copy reloc too. */
4267 h->non_got_ref = 1;
4268 h->pointer_equality_needed = 1;
4269 }
4270 goto dodyn;
4271
4272 case R_PPC_REL24:
4273 case R_PPC_REL14:
4274 case R_PPC_REL14_BRTAKEN:
4275 case R_PPC_REL14_BRNTAKEN:
4276 if (h == NULL)
4277 break;
4278 if (h == htab->elf.hgot)
4279 {
4280 if (htab->plt_type == PLT_UNSET)
4281 {
4282 htab->plt_type = PLT_OLD;
4283 htab->old_bfd = abfd;
4284 }
4285 break;
4286 }
4287 /* fall through */
4288
4289 case R_PPC_ADDR24:
4290 case R_PPC_ADDR14:
4291 case R_PPC_ADDR14_BRTAKEN:
4292 case R_PPC_ADDR14_BRNTAKEN:
4293 if (h != NULL && !info->shared)
4294 {
4295 /* We may need a plt entry if the symbol turns out to be
4296 a function defined in a dynamic object. */
4297 h->needs_plt = 1;
4298 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4299 return FALSE;
4300 break;
4301 }
4302
4303 dodyn:
4304 /* If we are creating a shared library, and this is a reloc
4305 against a global symbol, or a non PC relative reloc
4306 against a local symbol, then we need to copy the reloc
4307 into the shared library. However, if we are linking with
4308 -Bsymbolic, we do not need to copy a reloc against a
4309 global symbol which is defined in an object we are
4310 including in the link (i.e., DEF_REGULAR is set). At
4311 this point we have not seen all the input files, so it is
4312 possible that DEF_REGULAR is not set now but will be set
4313 later (it is never cleared). In case of a weak definition,
4314 DEF_REGULAR may be cleared later by a strong definition in
4315 a shared library. We account for that possibility below by
4316 storing information in the dyn_relocs field of the hash
4317 table entry. A similar situation occurs when creating
4318 shared libraries and symbol visibility changes render the
4319 symbol local.
4320
4321 If on the other hand, we are creating an executable, we
4322 may need to keep relocations for symbols satisfied by a
4323 dynamic library if we manage to avoid copy relocs for the
4324 symbol. */
4325 if ((info->shared
4326 && (must_be_dyn_reloc (info, r_type)
4327 || (h != NULL
4328 && (! info->symbolic
4329 || h->root.type == bfd_link_hash_defweak
4330 || !h->def_regular))))
4331 || (ELIMINATE_COPY_RELOCS
4332 && !info->shared
4333 && h != NULL
4334 && (h->root.type == bfd_link_hash_defweak
4335 || !h->def_regular)))
4336 {
4337 struct elf_dyn_relocs *p;
4338 struct elf_dyn_relocs **rel_head;
4339
4340 #ifdef DEBUG
4341 fprintf (stderr,
4342 "ppc_elf_check_relocs needs to "
4343 "create relocation for %s\n",
4344 (h && h->root.root.string
4345 ? h->root.root.string : "<unknown>"));
4346 #endif
4347 if (sreloc == NULL)
4348 {
4349 if (htab->elf.dynobj == NULL)
4350 htab->elf.dynobj = abfd;
4351
4352 sreloc = _bfd_elf_make_dynamic_reloc_section
4353 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4354
4355 if (sreloc == NULL)
4356 return FALSE;
4357 }
4358
4359 /* If this is a global symbol, we count the number of
4360 relocations we need for this symbol. */
4361 if (h != NULL)
4362 {
4363 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4364 }
4365 else
4366 {
4367 /* Track dynamic relocs needed for local syms too.
4368 We really need local syms available to do this
4369 easily. Oh well. */
4370 asection *s;
4371 void *vpp;
4372 Elf_Internal_Sym *isym;
4373
4374 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4375 abfd, r_symndx);
4376 if (isym == NULL)
4377 return FALSE;
4378
4379 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4380 if (s == NULL)
4381 s = sec;
4382
4383 vpp = &elf_section_data (s)->local_dynrel;
4384 rel_head = (struct elf_dyn_relocs **) vpp;
4385 }
4386
4387 p = *rel_head;
4388 if (p == NULL || p->sec != sec)
4389 {
4390 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4391 if (p == NULL)
4392 return FALSE;
4393 p->next = *rel_head;
4394 *rel_head = p;
4395 p->sec = sec;
4396 p->count = 0;
4397 p->pc_count = 0;
4398 }
4399
4400 p->count += 1;
4401 if (!must_be_dyn_reloc (info, r_type))
4402 p->pc_count += 1;
4403 }
4404
4405 break;
4406 }
4407 }
4408
4409 return TRUE;
4410 }
4411 \f
4412
4413 /* Merge object attributes from IBFD into OBFD. Raise an error if
4414 there are conflicting attributes. */
4415 static bfd_boolean
4416 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4417 {
4418 obj_attribute *in_attr, *in_attrs;
4419 obj_attribute *out_attr, *out_attrs;
4420
4421 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4422 {
4423 /* This is the first object. Copy the attributes. */
4424 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4425
4426 /* Use the Tag_null value to indicate the attributes have been
4427 initialized. */
4428 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4429
4430 return TRUE;
4431 }
4432
4433 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4434 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4435
4436 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4437 non-conflicting ones. */
4438 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4439 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4440 if (in_attr->i != out_attr->i)
4441 {
4442 out_attr->type = 1;
4443 if (out_attr->i == 0)
4444 out_attr->i = in_attr->i;
4445 else if (in_attr->i == 0)
4446 ;
4447 else if (out_attr->i == 1 && in_attr->i == 2)
4448 _bfd_error_handler
4449 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4450 else if (out_attr->i == 1 && in_attr->i == 3)
4451 _bfd_error_handler
4452 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4453 obfd, ibfd);
4454 else if (out_attr->i == 3 && in_attr->i == 1)
4455 _bfd_error_handler
4456 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4457 ibfd, obfd);
4458 else if (out_attr->i == 3 && in_attr->i == 2)
4459 _bfd_error_handler
4460 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4461 ibfd, obfd);
4462 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4463 _bfd_error_handler
4464 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4465 else if (in_attr->i > 3)
4466 _bfd_error_handler
4467 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4468 in_attr->i);
4469 else
4470 _bfd_error_handler
4471 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4472 out_attr->i);
4473 }
4474
4475 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4476 merge non-conflicting ones. */
4477 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4478 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4479 if (in_attr->i != out_attr->i)
4480 {
4481 const char *in_abi = NULL, *out_abi = NULL;
4482
4483 switch (in_attr->i)
4484 {
4485 case 1: in_abi = "generic"; break;
4486 case 2: in_abi = "AltiVec"; break;
4487 case 3: in_abi = "SPE"; break;
4488 }
4489
4490 switch (out_attr->i)
4491 {
4492 case 1: out_abi = "generic"; break;
4493 case 2: out_abi = "AltiVec"; break;
4494 case 3: out_abi = "SPE"; break;
4495 }
4496
4497 out_attr->type = 1;
4498 if (out_attr->i == 0)
4499 out_attr->i = in_attr->i;
4500 else if (in_attr->i == 0)
4501 ;
4502 /* For now, allow generic to transition to AltiVec or SPE
4503 without a warning. If GCC marked files with their stack
4504 alignment and used don't-care markings for files which are
4505 not affected by the vector ABI, we could warn about this
4506 case too. */
4507 else if (out_attr->i == 1)
4508 out_attr->i = in_attr->i;
4509 else if (in_attr->i == 1)
4510 ;
4511 else if (in_abi == NULL)
4512 _bfd_error_handler
4513 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4514 in_attr->i);
4515 else if (out_abi == NULL)
4516 _bfd_error_handler
4517 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4518 in_attr->i);
4519 else
4520 _bfd_error_handler
4521 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4522 ibfd, obfd, in_abi, out_abi);
4523 }
4524
4525 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4526 and merge non-conflicting ones. */
4527 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4528 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4529 if (in_attr->i != out_attr->i)
4530 {
4531 out_attr->type = 1;
4532 if (out_attr->i == 0)
4533 out_attr->i = in_attr->i;
4534 else if (in_attr->i == 0)
4535 ;
4536 else if (out_attr->i == 1 && in_attr->i == 2)
4537 _bfd_error_handler
4538 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4539 else if (out_attr->i == 2 && in_attr->i == 1)
4540 _bfd_error_handler
4541 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4542 else if (in_attr->i > 2)
4543 _bfd_error_handler
4544 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4545 in_attr->i);
4546 else
4547 _bfd_error_handler
4548 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4549 out_attr->i);
4550 }
4551
4552 /* Merge Tag_compatibility attributes and any common GNU ones. */
4553 _bfd_elf_merge_object_attributes (ibfd, obfd);
4554
4555 return TRUE;
4556 }
4557
4558 /* Merge backend specific data from an object file to the output
4559 object file when linking. */
4560
4561 static bfd_boolean
4562 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4563 {
4564 flagword old_flags;
4565 flagword new_flags;
4566 bfd_boolean error;
4567
4568 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4569 return TRUE;
4570
4571 /* Check if we have the same endianness. */
4572 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4573 return FALSE;
4574
4575 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4576 return FALSE;
4577
4578 new_flags = elf_elfheader (ibfd)->e_flags;
4579 old_flags = elf_elfheader (obfd)->e_flags;
4580 if (!elf_flags_init (obfd))
4581 {
4582 /* First call, no flags set. */
4583 elf_flags_init (obfd) = TRUE;
4584 elf_elfheader (obfd)->e_flags = new_flags;
4585 }
4586
4587 /* Compatible flags are ok. */
4588 else if (new_flags == old_flags)
4589 ;
4590
4591 /* Incompatible flags. */
4592 else
4593 {
4594 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4595 to be linked with either. */
4596 error = FALSE;
4597 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4598 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4599 {
4600 error = TRUE;
4601 (*_bfd_error_handler)
4602 (_("%B: compiled with -mrelocatable and linked with "
4603 "modules compiled normally"), ibfd);
4604 }
4605 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4606 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4607 {
4608 error = TRUE;
4609 (*_bfd_error_handler)
4610 (_("%B: compiled normally and linked with "
4611 "modules compiled with -mrelocatable"), ibfd);
4612 }
4613
4614 /* The output is -mrelocatable-lib iff both the input files are. */
4615 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4616 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4617
4618 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4619 but each input file is either -mrelocatable or -mrelocatable-lib. */
4620 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4621 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4622 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4623 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4624
4625 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4626 any module uses it. */
4627 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4628
4629 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4630 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4631
4632 /* Warn about any other mismatches. */
4633 if (new_flags != old_flags)
4634 {
4635 error = TRUE;
4636 (*_bfd_error_handler)
4637 (_("%B: uses different e_flags (0x%lx) fields "
4638 "than previous modules (0x%lx)"),
4639 ibfd, (long) new_flags, (long) old_flags);
4640 }
4641
4642 if (error)
4643 {
4644 bfd_set_error (bfd_error_bad_value);
4645 return FALSE;
4646 }
4647 }
4648
4649 return TRUE;
4650 }
4651
4652 static void
4653 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *contents,
4654 bfd_vma offset, bfd_vma relocation,
4655 split16_format_type split16_format)
4656
4657 {
4658 bfd_vma insn, top5, bottom11;
4659
4660 insn = bfd_get_32 (output_bfd, contents + offset);
4661 top5 = relocation >> 11;
4662 top5 = top5 << (split16_format == split16a_type ? 20 : 16);
4663 bottom11 = relocation & 0x7ff;
4664 insn |= top5;
4665 insn |= bottom11;
4666 bfd_put_32 (output_bfd, insn, contents + offset);
4667 }
4668
4669 \f
4670 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4671 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4672 int
4673 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4674 struct bfd_link_info *info,
4675 enum ppc_elf_plt_type plt_style,
4676 int emit_stub_syms)
4677 {
4678 struct ppc_elf_link_hash_table *htab;
4679 flagword flags;
4680
4681 htab = ppc_elf_hash_table (info);
4682
4683 htab->emit_stub_syms = emit_stub_syms;
4684
4685 if (htab->plt_type == PLT_UNSET)
4686 {
4687 struct elf_link_hash_entry *h;
4688
4689 if (plt_style == PLT_OLD)
4690 htab->plt_type = PLT_OLD;
4691 else if (info->shared
4692 && htab->elf.dynamic_sections_created
4693 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4694 FALSE, FALSE, TRUE)) != NULL
4695 && (h->type == STT_FUNC
4696 || h->needs_plt)
4697 && h->ref_regular
4698 && !(SYMBOL_CALLS_LOCAL (info, h)
4699 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4700 && h->root.type == bfd_link_hash_undefweak)))
4701 {
4702 /* Profiling of shared libs (and pies) is not supported with
4703 secure plt, because ppc32 does profiling before a
4704 function prologue and a secure plt pic call stubs needs
4705 r30 to be set up. */
4706 htab->plt_type = PLT_OLD;
4707 }
4708 else
4709 {
4710 bfd *ibfd;
4711 enum ppc_elf_plt_type plt_type = plt_style;
4712
4713 /* Look through the reloc flags left by ppc_elf_check_relocs.
4714 Use the old style bss plt if a file makes plt calls
4715 without using the new relocs, and if ld isn't given
4716 --secure-plt and we never see REL16 relocs. */
4717 if (plt_type == PLT_UNSET)
4718 plt_type = PLT_OLD;
4719 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4720 if (is_ppc_elf (ibfd))
4721 {
4722 if (ppc_elf_tdata (ibfd)->has_rel16)
4723 plt_type = PLT_NEW;
4724 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4725 {
4726 plt_type = PLT_OLD;
4727 htab->old_bfd = ibfd;
4728 break;
4729 }
4730 }
4731 htab->plt_type = plt_type;
4732 }
4733 }
4734 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4735 {
4736 if (htab->old_bfd != NULL)
4737 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4738 htab->old_bfd);
4739 else
4740 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4741 }
4742
4743 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4744
4745 if (htab->plt_type == PLT_NEW)
4746 {
4747 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4748 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4749
4750 /* The new PLT is a loaded section. */
4751 if (htab->plt != NULL
4752 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4753 return -1;
4754
4755 /* The new GOT is not executable. */
4756 if (htab->got != NULL
4757 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4758 return -1;
4759 }
4760 else
4761 {
4762 /* Stop an unused .glink section from affecting .text alignment. */
4763 if (htab->glink != NULL
4764 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4765 return -1;
4766 }
4767 return htab->plt_type == PLT_NEW;
4768 }
4769 \f
4770 /* Return the section that should be marked against GC for a given
4771 relocation. */
4772
4773 static asection *
4774 ppc_elf_gc_mark_hook (asection *sec,
4775 struct bfd_link_info *info,
4776 Elf_Internal_Rela *rel,
4777 struct elf_link_hash_entry *h,
4778 Elf_Internal_Sym *sym)
4779 {
4780 if (h != NULL)
4781 switch (ELF32_R_TYPE (rel->r_info))
4782 {
4783 case R_PPC_GNU_VTINHERIT:
4784 case R_PPC_GNU_VTENTRY:
4785 return NULL;
4786 }
4787
4788 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4789 }
4790
4791 /* Update the got, plt and dynamic reloc reference counts for the
4792 section being removed. */
4793
4794 static bfd_boolean
4795 ppc_elf_gc_sweep_hook (bfd *abfd,
4796 struct bfd_link_info *info,
4797 asection *sec,
4798 const Elf_Internal_Rela *relocs)
4799 {
4800 struct ppc_elf_link_hash_table *htab;
4801 Elf_Internal_Shdr *symtab_hdr;
4802 struct elf_link_hash_entry **sym_hashes;
4803 bfd_signed_vma *local_got_refcounts;
4804 const Elf_Internal_Rela *rel, *relend;
4805 asection *got2;
4806
4807 if (info->relocatable)
4808 return TRUE;
4809
4810 if ((sec->flags & SEC_ALLOC) == 0)
4811 return TRUE;
4812
4813 elf_section_data (sec)->local_dynrel = NULL;
4814
4815 htab = ppc_elf_hash_table (info);
4816 symtab_hdr = &elf_symtab_hdr (abfd);
4817 sym_hashes = elf_sym_hashes (abfd);
4818 local_got_refcounts = elf_local_got_refcounts (abfd);
4819 got2 = bfd_get_section_by_name (abfd, ".got2");
4820
4821 relend = relocs + sec->reloc_count;
4822 for (rel = relocs; rel < relend; rel++)
4823 {
4824 unsigned long r_symndx;
4825 enum elf_ppc_reloc_type r_type;
4826 struct elf_link_hash_entry *h = NULL;
4827
4828 r_symndx = ELF32_R_SYM (rel->r_info);
4829 if (r_symndx >= symtab_hdr->sh_info)
4830 {
4831 struct elf_dyn_relocs **pp, *p;
4832 struct ppc_elf_link_hash_entry *eh;
4833
4834 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4835 while (h->root.type == bfd_link_hash_indirect
4836 || h->root.type == bfd_link_hash_warning)
4837 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4838 eh = (struct ppc_elf_link_hash_entry *) h;
4839
4840 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4841 if (p->sec == sec)
4842 {
4843 /* Everything must go for SEC. */
4844 *pp = p->next;
4845 break;
4846 }
4847 }
4848
4849 r_type = ELF32_R_TYPE (rel->r_info);
4850 if (!htab->is_vxworks
4851 && h == NULL
4852 && local_got_refcounts != NULL
4853 && (!info->shared
4854 || is_branch_reloc (r_type)))
4855 {
4856 struct plt_entry **local_plt = (struct plt_entry **)
4857 (local_got_refcounts + symtab_hdr->sh_info);
4858 char *local_got_tls_masks = (char *)
4859 (local_plt + symtab_hdr->sh_info);
4860 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4861 {
4862 struct plt_entry **ifunc = local_plt + r_symndx;
4863 bfd_vma addend = 0;
4864 struct plt_entry *ent;
4865
4866 if (r_type == R_PPC_PLTREL24 && info->shared)
4867 addend = rel->r_addend;
4868 ent = find_plt_ent (ifunc, got2, addend);
4869 if (ent->plt.refcount > 0)
4870 ent->plt.refcount -= 1;
4871 continue;
4872 }
4873 }
4874
4875 switch (r_type)
4876 {
4877 case R_PPC_GOT_TLSLD16:
4878 case R_PPC_GOT_TLSLD16_LO:
4879 case R_PPC_GOT_TLSLD16_HI:
4880 case R_PPC_GOT_TLSLD16_HA:
4881 case R_PPC_GOT_TLSGD16:
4882 case R_PPC_GOT_TLSGD16_LO:
4883 case R_PPC_GOT_TLSGD16_HI:
4884 case R_PPC_GOT_TLSGD16_HA:
4885 case R_PPC_GOT_TPREL16:
4886 case R_PPC_GOT_TPREL16_LO:
4887 case R_PPC_GOT_TPREL16_HI:
4888 case R_PPC_GOT_TPREL16_HA:
4889 case R_PPC_GOT_DTPREL16:
4890 case R_PPC_GOT_DTPREL16_LO:
4891 case R_PPC_GOT_DTPREL16_HI:
4892 case R_PPC_GOT_DTPREL16_HA:
4893 case R_PPC_GOT16:
4894 case R_PPC_GOT16_LO:
4895 case R_PPC_GOT16_HI:
4896 case R_PPC_GOT16_HA:
4897 if (h != NULL)
4898 {
4899 if (h->got.refcount > 0)
4900 h->got.refcount--;
4901 if (!info->shared)
4902 {
4903 struct plt_entry *ent;
4904
4905 ent = find_plt_ent (&h->plt.plist, NULL, 0);
4906 if (ent != NULL && ent->plt.refcount > 0)
4907 ent->plt.refcount -= 1;
4908 }
4909 }
4910 else if (local_got_refcounts != NULL)
4911 {
4912 if (local_got_refcounts[r_symndx] > 0)
4913 local_got_refcounts[r_symndx]--;
4914 }
4915 break;
4916
4917 case R_PPC_REL24:
4918 case R_PPC_REL14:
4919 case R_PPC_REL14_BRTAKEN:
4920 case R_PPC_REL14_BRNTAKEN:
4921 case R_PPC_REL32:
4922 if (h == NULL || h == htab->elf.hgot)
4923 break;
4924 /* Fall thru */
4925
4926 case R_PPC_ADDR32:
4927 case R_PPC_ADDR24:
4928 case R_PPC_ADDR16:
4929 case R_PPC_ADDR16_LO:
4930 case R_PPC_ADDR16_HI:
4931 case R_PPC_ADDR16_HA:
4932 case R_PPC_ADDR14:
4933 case R_PPC_ADDR14_BRTAKEN:
4934 case R_PPC_ADDR14_BRNTAKEN:
4935 case R_PPC_UADDR32:
4936 case R_PPC_UADDR16:
4937 if (info->shared)
4938 break;
4939
4940 case R_PPC_PLT32:
4941 case R_PPC_PLTREL24:
4942 case R_PPC_PLTREL32:
4943 case R_PPC_PLT16_LO:
4944 case R_PPC_PLT16_HI:
4945 case R_PPC_PLT16_HA:
4946 if (h != NULL)
4947 {
4948 bfd_vma addend = 0;
4949 struct plt_entry *ent;
4950
4951 if (r_type == R_PPC_PLTREL24 && info->shared)
4952 addend = rel->r_addend;
4953 ent = find_plt_ent (&h->plt.plist, got2, addend);
4954 if (ent != NULL && ent->plt.refcount > 0)
4955 ent->plt.refcount -= 1;
4956 }
4957 break;
4958
4959 default:
4960 break;
4961 }
4962 }
4963 return TRUE;
4964 }
4965 \f
4966 /* Set plt output section type, htab->tls_get_addr, and call the
4967 generic ELF tls_setup function. */
4968
4969 asection *
4970 ppc_elf_tls_setup (bfd *obfd,
4971 struct bfd_link_info *info,
4972 int no_tls_get_addr_opt)
4973 {
4974 struct ppc_elf_link_hash_table *htab;
4975
4976 htab = ppc_elf_hash_table (info);
4977 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4978 FALSE, FALSE, TRUE);
4979 if (!no_tls_get_addr_opt)
4980 {
4981 struct elf_link_hash_entry *opt, *tga;
4982 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
4983 FALSE, FALSE, TRUE);
4984 if (opt != NULL
4985 && (opt->root.type == bfd_link_hash_defined
4986 || opt->root.type == bfd_link_hash_defweak))
4987 {
4988 /* If glibc supports an optimized __tls_get_addr call stub,
4989 signalled by the presence of __tls_get_addr_opt, and we'll
4990 be calling __tls_get_addr via a plt call stub, then
4991 make __tls_get_addr point to __tls_get_addr_opt. */
4992 tga = htab->tls_get_addr;
4993 if (htab->elf.dynamic_sections_created
4994 && tga != NULL
4995 && (tga->type == STT_FUNC
4996 || tga->needs_plt)
4997 && !(SYMBOL_CALLS_LOCAL (info, tga)
4998 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
4999 && tga->root.type == bfd_link_hash_undefweak)))
5000 {
5001 struct plt_entry *ent;
5002 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5003 if (ent->plt.refcount > 0)
5004 break;
5005 if (ent != NULL)
5006 {
5007 tga->root.type = bfd_link_hash_indirect;
5008 tga->root.u.i.link = &opt->root;
5009 ppc_elf_copy_indirect_symbol (info, opt, tga);
5010 if (opt->dynindx != -1)
5011 {
5012 /* Use __tls_get_addr_opt in dynamic relocations. */
5013 opt->dynindx = -1;
5014 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5015 opt->dynstr_index);
5016 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5017 return FALSE;
5018 }
5019 htab->tls_get_addr = opt;
5020 }
5021 }
5022 }
5023 else
5024 no_tls_get_addr_opt = TRUE;
5025 }
5026 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
5027 if (htab->plt_type == PLT_NEW
5028 && htab->plt != NULL
5029 && htab->plt->output_section != NULL)
5030 {
5031 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5032 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5033 }
5034
5035 return _bfd_elf_tls_setup (obfd, info);
5036 }
5037
5038 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5039 HASH. */
5040
5041 static bfd_boolean
5042 branch_reloc_hash_match (const bfd *ibfd,
5043 const Elf_Internal_Rela *rel,
5044 const struct elf_link_hash_entry *hash)
5045 {
5046 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5047 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5048 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5049
5050 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5051 {
5052 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5053 struct elf_link_hash_entry *h;
5054
5055 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5056 while (h->root.type == bfd_link_hash_indirect
5057 || h->root.type == bfd_link_hash_warning)
5058 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5059 if (h == hash)
5060 return TRUE;
5061 }
5062 return FALSE;
5063 }
5064
5065 /* Run through all the TLS relocs looking for optimization
5066 opportunities. */
5067
5068 bfd_boolean
5069 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5070 struct bfd_link_info *info)
5071 {
5072 bfd *ibfd;
5073 asection *sec;
5074 struct ppc_elf_link_hash_table *htab;
5075 int pass;
5076
5077 if (info->relocatable || !info->executable)
5078 return TRUE;
5079
5080 htab = ppc_elf_hash_table (info);
5081 if (htab == NULL)
5082 return FALSE;
5083
5084 /* Make two passes through the relocs. First time check that tls
5085 relocs involved in setting up a tls_get_addr call are indeed
5086 followed by such a call. If they are not, don't do any tls
5087 optimization. On the second pass twiddle tls_mask flags to
5088 notify relocate_section that optimization can be done, and
5089 adjust got and plt refcounts. */
5090 for (pass = 0; pass < 2; ++pass)
5091 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5092 {
5093 Elf_Internal_Sym *locsyms = NULL;
5094 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5095 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5096
5097 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5098 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5099 {
5100 Elf_Internal_Rela *relstart, *rel, *relend;
5101 int expecting_tls_get_addr = 0;
5102
5103 /* Read the relocations. */
5104 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5105 info->keep_memory);
5106 if (relstart == NULL)
5107 return FALSE;
5108
5109 relend = relstart + sec->reloc_count;
5110 for (rel = relstart; rel < relend; rel++)
5111 {
5112 enum elf_ppc_reloc_type r_type;
5113 unsigned long r_symndx;
5114 struct elf_link_hash_entry *h = NULL;
5115 char *tls_mask;
5116 char tls_set, tls_clear;
5117 bfd_boolean is_local;
5118 bfd_signed_vma *got_count;
5119
5120 r_symndx = ELF32_R_SYM (rel->r_info);
5121 if (r_symndx >= symtab_hdr->sh_info)
5122 {
5123 struct elf_link_hash_entry **sym_hashes;
5124
5125 sym_hashes = elf_sym_hashes (ibfd);
5126 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5127 while (h->root.type == bfd_link_hash_indirect
5128 || h->root.type == bfd_link_hash_warning)
5129 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5130 }
5131
5132 is_local = FALSE;
5133 if (h == NULL
5134 || !h->def_dynamic)
5135 is_local = TRUE;
5136
5137 r_type = ELF32_R_TYPE (rel->r_info);
5138 /* If this section has old-style __tls_get_addr calls
5139 without marker relocs, then check that each
5140 __tls_get_addr call reloc is preceded by a reloc
5141 that conceivably belongs to the __tls_get_addr arg
5142 setup insn. If we don't find matching arg setup
5143 relocs, don't do any tls optimization. */
5144 if (pass == 0
5145 && sec->has_tls_get_addr_call
5146 && h != NULL
5147 && h == htab->tls_get_addr
5148 && !expecting_tls_get_addr
5149 && is_branch_reloc (r_type))
5150 {
5151 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5152 "TLS optimization disabled\n",
5153 ibfd, sec, rel->r_offset);
5154 if (elf_section_data (sec)->relocs != relstart)
5155 free (relstart);
5156 return TRUE;
5157 }
5158
5159 expecting_tls_get_addr = 0;
5160 switch (r_type)
5161 {
5162 case R_PPC_GOT_TLSLD16:
5163 case R_PPC_GOT_TLSLD16_LO:
5164 expecting_tls_get_addr = 1;
5165 /* Fall thru */
5166
5167 case R_PPC_GOT_TLSLD16_HI:
5168 case R_PPC_GOT_TLSLD16_HA:
5169 /* These relocs should never be against a symbol
5170 defined in a shared lib. Leave them alone if
5171 that turns out to be the case. */
5172 if (!is_local)
5173 continue;
5174
5175 /* LD -> LE */
5176 tls_set = 0;
5177 tls_clear = TLS_LD;
5178 break;
5179
5180 case R_PPC_GOT_TLSGD16:
5181 case R_PPC_GOT_TLSGD16_LO:
5182 expecting_tls_get_addr = 1;
5183 /* Fall thru */
5184
5185 case R_PPC_GOT_TLSGD16_HI:
5186 case R_PPC_GOT_TLSGD16_HA:
5187 if (is_local)
5188 /* GD -> LE */
5189 tls_set = 0;
5190 else
5191 /* GD -> IE */
5192 tls_set = TLS_TLS | TLS_TPRELGD;
5193 tls_clear = TLS_GD;
5194 break;
5195
5196 case R_PPC_GOT_TPREL16:
5197 case R_PPC_GOT_TPREL16_LO:
5198 case R_PPC_GOT_TPREL16_HI:
5199 case R_PPC_GOT_TPREL16_HA:
5200 if (is_local)
5201 {
5202 /* IE -> LE */
5203 tls_set = 0;
5204 tls_clear = TLS_TPREL;
5205 break;
5206 }
5207 else
5208 continue;
5209
5210 case R_PPC_TLSGD:
5211 case R_PPC_TLSLD:
5212 expecting_tls_get_addr = 2;
5213 tls_set = 0;
5214 tls_clear = 0;
5215 break;
5216
5217 default:
5218 continue;
5219 }
5220
5221 if (pass == 0)
5222 {
5223 if (!expecting_tls_get_addr
5224 || (expecting_tls_get_addr == 1
5225 && !sec->has_tls_get_addr_call))
5226 continue;
5227
5228 if (rel + 1 < relend
5229 && branch_reloc_hash_match (ibfd, rel + 1,
5230 htab->tls_get_addr))
5231 continue;
5232
5233 /* Uh oh, we didn't find the expected call. We
5234 could just mark this symbol to exclude it
5235 from tls optimization but it's safer to skip
5236 the entire optimization. */
5237 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5238 "TLS optimization disabled\n"),
5239 ibfd, sec, rel->r_offset);
5240 if (elf_section_data (sec)->relocs != relstart)
5241 free (relstart);
5242 return TRUE;
5243 }
5244
5245 if (expecting_tls_get_addr)
5246 {
5247 struct plt_entry *ent;
5248 bfd_vma addend = 0;
5249
5250 if (info->shared
5251 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5252 addend = rel[1].r_addend;
5253 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5254 got2, addend);
5255 if (ent != NULL && ent->plt.refcount > 0)
5256 ent->plt.refcount -= 1;
5257
5258 if (expecting_tls_get_addr == 2)
5259 continue;
5260 }
5261
5262 if (h != NULL)
5263 {
5264 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5265 got_count = &h->got.refcount;
5266 }
5267 else
5268 {
5269 bfd_signed_vma *lgot_refs;
5270 struct plt_entry **local_plt;
5271 char *lgot_masks;
5272
5273 if (locsyms == NULL)
5274 {
5275 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5276 if (locsyms == NULL)
5277 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5278 symtab_hdr->sh_info,
5279 0, NULL, NULL, NULL);
5280 if (locsyms == NULL)
5281 {
5282 if (elf_section_data (sec)->relocs != relstart)
5283 free (relstart);
5284 return FALSE;
5285 }
5286 }
5287 lgot_refs = elf_local_got_refcounts (ibfd);
5288 if (lgot_refs == NULL)
5289 abort ();
5290 local_plt = (struct plt_entry **)
5291 (lgot_refs + symtab_hdr->sh_info);
5292 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5293 tls_mask = &lgot_masks[r_symndx];
5294 got_count = &lgot_refs[r_symndx];
5295 }
5296
5297 if (tls_set == 0)
5298 {
5299 /* We managed to get rid of a got entry. */
5300 if (*got_count > 0)
5301 *got_count -= 1;
5302 }
5303
5304 *tls_mask |= tls_set;
5305 *tls_mask &= ~tls_clear;
5306 }
5307
5308 if (elf_section_data (sec)->relocs != relstart)
5309 free (relstart);
5310 }
5311
5312 if (locsyms != NULL
5313 && (symtab_hdr->contents != (unsigned char *) locsyms))
5314 {
5315 if (!info->keep_memory)
5316 free (locsyms);
5317 else
5318 symtab_hdr->contents = (unsigned char *) locsyms;
5319 }
5320 }
5321 return TRUE;
5322 }
5323 \f
5324 /* Return true if we have dynamic relocs that apply to read-only sections. */
5325
5326 static bfd_boolean
5327 readonly_dynrelocs (struct elf_link_hash_entry *h)
5328 {
5329 struct elf_dyn_relocs *p;
5330
5331 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5332 {
5333 asection *s = p->sec->output_section;
5334
5335 if (s != NULL
5336 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5337 == (SEC_READONLY | SEC_ALLOC)))
5338 return TRUE;
5339 }
5340 return FALSE;
5341 }
5342
5343 /* Adjust a symbol defined by a dynamic object and referenced by a
5344 regular object. The current definition is in some section of the
5345 dynamic object, but we're not including those sections. We have to
5346 change the definition to something the rest of the link can
5347 understand. */
5348
5349 static bfd_boolean
5350 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5351 struct elf_link_hash_entry *h)
5352 {
5353 struct ppc_elf_link_hash_table *htab;
5354 asection *s;
5355
5356 #ifdef DEBUG
5357 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5358 h->root.root.string);
5359 #endif
5360
5361 /* Make sure we know what is going on here. */
5362 htab = ppc_elf_hash_table (info);
5363 BFD_ASSERT (htab->elf.dynobj != NULL
5364 && (h->needs_plt
5365 || h->type == STT_GNU_IFUNC
5366 || h->u.weakdef != NULL
5367 || (h->def_dynamic
5368 && h->ref_regular
5369 && !h->def_regular)));
5370
5371 /* Deal with function syms. */
5372 if (h->type == STT_FUNC
5373 || h->type == STT_GNU_IFUNC
5374 || h->needs_plt)
5375 {
5376 /* Clear procedure linkage table information for any symbol that
5377 won't need a .plt entry. */
5378 struct plt_entry *ent;
5379 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5380 if (ent->plt.refcount > 0)
5381 break;
5382 if (ent == NULL
5383 || (h->type != STT_GNU_IFUNC
5384 && (SYMBOL_CALLS_LOCAL (info, h)
5385 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5386 && h->root.type == bfd_link_hash_undefweak))))
5387 {
5388 /* A PLT entry is not required/allowed when:
5389
5390 1. We are not using ld.so; because then the PLT entry
5391 can't be set up, so we can't use one. In this case,
5392 ppc_elf_adjust_dynamic_symbol won't even be called.
5393
5394 2. GC has rendered the entry unused.
5395
5396 3. We know for certain that a call to this symbol
5397 will go to this object, or will remain undefined. */
5398 h->plt.plist = NULL;
5399 h->needs_plt = 0;
5400 }
5401 else
5402 {
5403 /* After adjust_dynamic_symbol, non_got_ref set in the
5404 non-shared case means that we have allocated space in
5405 .dynbss for the symbol and thus dyn_relocs for this
5406 symbol should be discarded.
5407 If we get here we know we are making a PLT entry for this
5408 symbol, and in an executable we'd normally resolve
5409 relocations against this symbol to the PLT entry. Allow
5410 dynamic relocs if the reference is weak, and the dynamic
5411 relocs will not cause text relocation. */
5412 if (!h->ref_regular_nonweak
5413 && h->non_got_ref
5414 && h->type != STT_GNU_IFUNC
5415 && !htab->is_vxworks
5416 && !ppc_elf_hash_entry (h)->has_sda_refs
5417 && !readonly_dynrelocs (h))
5418 h->non_got_ref = 0;
5419 }
5420 return TRUE;
5421 }
5422 else
5423 h->plt.plist = NULL;
5424
5425 /* If this is a weak symbol, and there is a real definition, the
5426 processor independent code will have arranged for us to see the
5427 real definition first, and we can just use the same value. */
5428 if (h->u.weakdef != NULL)
5429 {
5430 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5431 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5432 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5433 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5434 if (ELIMINATE_COPY_RELOCS)
5435 h->non_got_ref = h->u.weakdef->non_got_ref;
5436 return TRUE;
5437 }
5438
5439 /* This is a reference to a symbol defined by a dynamic object which
5440 is not a function. */
5441
5442 /* If we are creating a shared library, we must presume that the
5443 only references to the symbol are via the global offset table.
5444 For such cases we need not do anything here; the relocations will
5445 be handled correctly by relocate_section. */
5446 if (info->shared)
5447 return TRUE;
5448
5449 /* If there are no references to this symbol that do not use the
5450 GOT, we don't need to generate a copy reloc. */
5451 if (!h->non_got_ref)
5452 return TRUE;
5453
5454 /* If we didn't find any dynamic relocs in read-only sections, then
5455 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5456 We can't do this if there are any small data relocations. This
5457 doesn't work on VxWorks, where we can not have dynamic
5458 relocations (other than copy and jump slot relocations) in an
5459 executable. */
5460 if (ELIMINATE_COPY_RELOCS
5461 && !ppc_elf_hash_entry (h)->has_sda_refs
5462 && !htab->is_vxworks
5463 && !h->def_regular
5464 && !readonly_dynrelocs (h))
5465 {
5466 h->non_got_ref = 0;
5467 return TRUE;
5468 }
5469
5470 /* We must allocate the symbol in our .dynbss section, which will
5471 become part of the .bss section of the executable. There will be
5472 an entry for this symbol in the .dynsym section. The dynamic
5473 object will contain position independent code, so all references
5474 from the dynamic object to this symbol will go through the global
5475 offset table. The dynamic linker will use the .dynsym entry to
5476 determine the address it must put in the global offset table, so
5477 both the dynamic object and the regular object will refer to the
5478 same memory location for the variable.
5479
5480 Of course, if the symbol is referenced using SDAREL relocs, we
5481 must instead allocate it in .sbss. */
5482
5483 if (ppc_elf_hash_entry (h)->has_sda_refs)
5484 s = htab->dynsbss;
5485 else
5486 s = htab->dynbss;
5487 BFD_ASSERT (s != NULL);
5488
5489 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5490 copy the initial value out of the dynamic object and into the
5491 runtime process image. We need to remember the offset into the
5492 .rela.bss section we are going to use. */
5493 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5494 {
5495 asection *srel;
5496
5497 if (ppc_elf_hash_entry (h)->has_sda_refs)
5498 srel = htab->relsbss;
5499 else
5500 srel = htab->relbss;
5501 BFD_ASSERT (srel != NULL);
5502 srel->size += sizeof (Elf32_External_Rela);
5503 h->needs_copy = 1;
5504 }
5505
5506 return _bfd_elf_adjust_dynamic_copy (h, s);
5507 }
5508 \f
5509 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5510 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5511 specifying the addend on the plt relocation. For -fpic code, the sym
5512 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5513 xxxxxxxx.got2.plt_pic32.<callee>. */
5514
5515 static bfd_boolean
5516 add_stub_sym (struct plt_entry *ent,
5517 struct elf_link_hash_entry *h,
5518 struct bfd_link_info *info)
5519 {
5520 struct elf_link_hash_entry *sh;
5521 size_t len1, len2, len3;
5522 char *name;
5523 const char *stub;
5524 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5525
5526 if (info->shared)
5527 stub = ".plt_pic32.";
5528 else
5529 stub = ".plt_call32.";
5530
5531 len1 = strlen (h->root.root.string);
5532 len2 = strlen (stub);
5533 len3 = 0;
5534 if (ent->sec)
5535 len3 = strlen (ent->sec->name);
5536 name = bfd_malloc (len1 + len2 + len3 + 9);
5537 if (name == NULL)
5538 return FALSE;
5539 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5540 if (ent->sec)
5541 memcpy (name + 8, ent->sec->name, len3);
5542 memcpy (name + 8 + len3, stub, len2);
5543 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5544 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5545 if (sh == NULL)
5546 return FALSE;
5547 if (sh->root.type == bfd_link_hash_new)
5548 {
5549 sh->root.type = bfd_link_hash_defined;
5550 sh->root.u.def.section = htab->glink;
5551 sh->root.u.def.value = ent->glink_offset;
5552 sh->ref_regular = 1;
5553 sh->def_regular = 1;
5554 sh->ref_regular_nonweak = 1;
5555 sh->forced_local = 1;
5556 sh->non_elf = 0;
5557 }
5558 return TRUE;
5559 }
5560
5561 /* Allocate NEED contiguous space in .got, and return the offset.
5562 Handles allocation of the got header when crossing 32k. */
5563
5564 static bfd_vma
5565 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5566 {
5567 bfd_vma where;
5568 unsigned int max_before_header;
5569
5570 if (htab->plt_type == PLT_VXWORKS)
5571 {
5572 where = htab->got->size;
5573 htab->got->size += need;
5574 }
5575 else
5576 {
5577 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5578 if (need <= htab->got_gap)
5579 {
5580 where = max_before_header - htab->got_gap;
5581 htab->got_gap -= need;
5582 }
5583 else
5584 {
5585 if (htab->got->size + need > max_before_header
5586 && htab->got->size <= max_before_header)
5587 {
5588 htab->got_gap = max_before_header - htab->got->size;
5589 htab->got->size = max_before_header + htab->got_header_size;
5590 }
5591 where = htab->got->size;
5592 htab->got->size += need;
5593 }
5594 }
5595 return where;
5596 }
5597
5598 /* Allocate space in associated reloc sections for dynamic relocs. */
5599
5600 static bfd_boolean
5601 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5602 {
5603 struct bfd_link_info *info = inf;
5604 struct ppc_elf_link_hash_entry *eh;
5605 struct ppc_elf_link_hash_table *htab;
5606 struct elf_dyn_relocs *p;
5607
5608 if (h->root.type == bfd_link_hash_indirect)
5609 return TRUE;
5610
5611 htab = ppc_elf_hash_table (info);
5612 if (htab->elf.dynamic_sections_created
5613 || h->type == STT_GNU_IFUNC)
5614 {
5615 struct plt_entry *ent;
5616 bfd_boolean doneone = FALSE;
5617 bfd_vma plt_offset = 0, glink_offset = 0;
5618 bfd_boolean dyn;
5619
5620 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5621 if (ent->plt.refcount > 0)
5622 {
5623 /* Make sure this symbol is output as a dynamic symbol. */
5624 if (h->dynindx == -1
5625 && !h->forced_local
5626 && !h->def_regular
5627 && htab->elf.dynamic_sections_created)
5628 {
5629 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5630 return FALSE;
5631 }
5632
5633 dyn = htab->elf.dynamic_sections_created;
5634 if (info->shared
5635 || h->type == STT_GNU_IFUNC
5636 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5637 {
5638 asection *s = htab->plt;
5639 if (!dyn || h->dynindx == -1)
5640 s = htab->iplt;
5641
5642 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5643 {
5644 if (!doneone)
5645 {
5646 plt_offset = s->size;
5647 s->size += 4;
5648 }
5649 ent->plt.offset = plt_offset;
5650
5651 s = htab->glink;
5652 if (!doneone || info->shared)
5653 {
5654 glink_offset = s->size;
5655 s->size += GLINK_ENTRY_SIZE;
5656 if (h == htab->tls_get_addr
5657 && !htab->no_tls_get_addr_opt)
5658 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5659 }
5660 if (!doneone
5661 && !info->shared
5662 && h->def_dynamic
5663 && !h->def_regular)
5664 {
5665 h->root.u.def.section = s;
5666 h->root.u.def.value = glink_offset;
5667 }
5668 ent->glink_offset = glink_offset;
5669
5670 if (htab->emit_stub_syms
5671 && !add_stub_sym (ent, h, info))
5672 return FALSE;
5673 }
5674 else
5675 {
5676 if (!doneone)
5677 {
5678 /* If this is the first .plt entry, make room
5679 for the special first entry. */
5680 if (s->size == 0)
5681 s->size += htab->plt_initial_entry_size;
5682
5683 /* The PowerPC PLT is actually composed of two
5684 parts, the first part is 2 words (for a load
5685 and a jump), and then there is a remaining
5686 word available at the end. */
5687 plt_offset = (htab->plt_initial_entry_size
5688 + (htab->plt_slot_size
5689 * ((s->size
5690 - htab->plt_initial_entry_size)
5691 / htab->plt_entry_size)));
5692
5693 /* If this symbol is not defined in a regular
5694 file, and we are not generating a shared
5695 library, then set the symbol to this location
5696 in the .plt. This is to avoid text
5697 relocations, and is required to make
5698 function pointers compare as equal between
5699 the normal executable and the shared library. */
5700 if (! info->shared
5701 && h->def_dynamic
5702 && !h->def_regular)
5703 {
5704 h->root.u.def.section = s;
5705 h->root.u.def.value = plt_offset;
5706 }
5707
5708 /* Make room for this entry. */
5709 s->size += htab->plt_entry_size;
5710 /* After the 8192nd entry, room for two entries
5711 is allocated. */
5712 if (htab->plt_type == PLT_OLD
5713 && (s->size - htab->plt_initial_entry_size)
5714 / htab->plt_entry_size
5715 > PLT_NUM_SINGLE_ENTRIES)
5716 s->size += htab->plt_entry_size;
5717 }
5718 ent->plt.offset = plt_offset;
5719 }
5720
5721 /* We also need to make an entry in the .rela.plt section. */
5722 if (!doneone)
5723 {
5724 if (!htab->elf.dynamic_sections_created
5725 || h->dynindx == -1)
5726 htab->reliplt->size += sizeof (Elf32_External_Rela);
5727 else
5728 {
5729 htab->relplt->size += sizeof (Elf32_External_Rela);
5730
5731 if (htab->plt_type == PLT_VXWORKS)
5732 {
5733 /* Allocate space for the unloaded relocations. */
5734 if (!info->shared
5735 && htab->elf.dynamic_sections_created)
5736 {
5737 if (ent->plt.offset
5738 == (bfd_vma) htab->plt_initial_entry_size)
5739 {
5740 htab->srelplt2->size
5741 += (sizeof (Elf32_External_Rela)
5742 * VXWORKS_PLTRESOLVE_RELOCS);
5743 }
5744
5745 htab->srelplt2->size
5746 += (sizeof (Elf32_External_Rela)
5747 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5748 }
5749
5750 /* Every PLT entry has an associated GOT entry in
5751 .got.plt. */
5752 htab->sgotplt->size += 4;
5753 }
5754 }
5755 doneone = TRUE;
5756 }
5757 }
5758 else
5759 ent->plt.offset = (bfd_vma) -1;
5760 }
5761 else
5762 ent->plt.offset = (bfd_vma) -1;
5763
5764 if (!doneone)
5765 {
5766 h->plt.plist = NULL;
5767 h->needs_plt = 0;
5768 }
5769 }
5770 else
5771 {
5772 h->plt.plist = NULL;
5773 h->needs_plt = 0;
5774 }
5775
5776 eh = (struct ppc_elf_link_hash_entry *) h;
5777 if (eh->elf.got.refcount > 0)
5778 {
5779 bfd_boolean dyn;
5780 unsigned int need;
5781
5782 /* Make sure this symbol is output as a dynamic symbol. */
5783 if (eh->elf.dynindx == -1
5784 && !eh->elf.forced_local
5785 && eh->elf.type != STT_GNU_IFUNC
5786 && htab->elf.dynamic_sections_created)
5787 {
5788 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5789 return FALSE;
5790 }
5791
5792 need = 0;
5793 if ((eh->tls_mask & TLS_TLS) != 0)
5794 {
5795 if ((eh->tls_mask & TLS_LD) != 0)
5796 {
5797 if (!eh->elf.def_dynamic)
5798 /* We'll just use htab->tlsld_got.offset. This should
5799 always be the case. It's a little odd if we have
5800 a local dynamic reloc against a non-local symbol. */
5801 htab->tlsld_got.refcount += 1;
5802 else
5803 need += 8;
5804 }
5805 if ((eh->tls_mask & TLS_GD) != 0)
5806 need += 8;
5807 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5808 need += 4;
5809 if ((eh->tls_mask & TLS_DTPREL) != 0)
5810 need += 4;
5811 }
5812 else
5813 need += 4;
5814 if (need == 0)
5815 eh->elf.got.offset = (bfd_vma) -1;
5816 else
5817 {
5818 eh->elf.got.offset = allocate_got (htab, need);
5819 dyn = htab->elf.dynamic_sections_created;
5820 if ((info->shared
5821 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5822 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5823 || eh->elf.root.type != bfd_link_hash_undefweak))
5824 {
5825 asection *rsec = htab->relgot;
5826 /* All the entries we allocated need relocs.
5827 Except LD only needs one. */
5828 if ((eh->tls_mask & TLS_LD) != 0
5829 && eh->elf.def_dynamic)
5830 need -= 4;
5831 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5832 }
5833 }
5834 }
5835 else
5836 eh->elf.got.offset = (bfd_vma) -1;
5837
5838 if (eh->dyn_relocs == NULL
5839 || !htab->elf.dynamic_sections_created)
5840 return TRUE;
5841
5842 /* In the shared -Bsymbolic case, discard space allocated for
5843 dynamic pc-relative relocs against symbols which turn out to be
5844 defined in regular objects. For the normal shared case, discard
5845 space for relocs that have become local due to symbol visibility
5846 changes. */
5847
5848 if (info->shared)
5849 {
5850 /* Relocs that use pc_count are those that appear on a call insn,
5851 or certain REL relocs (see must_be_dyn_reloc) that can be
5852 generated via assembly. We want calls to protected symbols to
5853 resolve directly to the function rather than going via the plt.
5854 If people want function pointer comparisons to work as expected
5855 then they should avoid writing weird assembly. */
5856 if (SYMBOL_CALLS_LOCAL (info, h))
5857 {
5858 struct elf_dyn_relocs **pp;
5859
5860 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5861 {
5862 p->count -= p->pc_count;
5863 p->pc_count = 0;
5864 if (p->count == 0)
5865 *pp = p->next;
5866 else
5867 pp = &p->next;
5868 }
5869 }
5870
5871 if (htab->is_vxworks)
5872 {
5873 struct elf_dyn_relocs **pp;
5874
5875 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5876 {
5877 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5878 *pp = p->next;
5879 else
5880 pp = &p->next;
5881 }
5882 }
5883
5884 /* Discard relocs on undefined symbols that must be local. */
5885 if (eh->dyn_relocs != NULL
5886 && h->root.type == bfd_link_hash_undefined
5887 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5888 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5889 eh->dyn_relocs = NULL;
5890
5891 /* Also discard relocs on undefined weak syms with non-default
5892 visibility. */
5893 if (eh->dyn_relocs != NULL
5894 && h->root.type == bfd_link_hash_undefweak)
5895 {
5896 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5897 eh->dyn_relocs = NULL;
5898
5899 /* Make sure undefined weak symbols are output as a dynamic
5900 symbol in PIEs. */
5901 else if (h->dynindx == -1
5902 && !h->forced_local
5903 && !h->def_regular)
5904 {
5905 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5906 return FALSE;
5907 }
5908 }
5909 }
5910 else if (ELIMINATE_COPY_RELOCS)
5911 {
5912 /* For the non-shared case, discard space for relocs against
5913 symbols which turn out to need copy relocs or are not
5914 dynamic. */
5915
5916 if (!h->non_got_ref
5917 && !h->def_regular)
5918 {
5919 /* Make sure this symbol is output as a dynamic symbol.
5920 Undefined weak syms won't yet be marked as dynamic. */
5921 if (h->dynindx == -1
5922 && !h->forced_local)
5923 {
5924 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5925 return FALSE;
5926 }
5927
5928 /* If that succeeded, we know we'll be keeping all the
5929 relocs. */
5930 if (h->dynindx != -1)
5931 goto keep;
5932 }
5933
5934 eh->dyn_relocs = NULL;
5935
5936 keep: ;
5937 }
5938
5939 /* Finally, allocate space. */
5940 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5941 {
5942 asection *sreloc = elf_section_data (p->sec)->sreloc;
5943 if (!htab->elf.dynamic_sections_created)
5944 sreloc = htab->reliplt;
5945 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5946 }
5947
5948 return TRUE;
5949 }
5950
5951 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5952 read-only sections. */
5953
5954 static bfd_boolean
5955 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5956 {
5957 if (h->root.type == bfd_link_hash_indirect)
5958 return TRUE;
5959
5960 if (readonly_dynrelocs (h))
5961 {
5962 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5963
5964 /* Not an error, just cut short the traversal. */
5965 return FALSE;
5966 }
5967 return TRUE;
5968 }
5969
5970 static const unsigned char glink_eh_frame_cie[] =
5971 {
5972 0, 0, 0, 16, /* length. */
5973 0, 0, 0, 0, /* id. */
5974 1, /* CIE version. */
5975 'z', 'R', 0, /* Augmentation string. */
5976 4, /* Code alignment. */
5977 0x7c, /* Data alignment. */
5978 65, /* RA reg. */
5979 1, /* Augmentation size. */
5980 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
5981 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
5982 };
5983
5984 /* Set the sizes of the dynamic sections. */
5985
5986 static bfd_boolean
5987 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5988 struct bfd_link_info *info)
5989 {
5990 struct ppc_elf_link_hash_table *htab;
5991 asection *s;
5992 bfd_boolean relocs;
5993 bfd *ibfd;
5994
5995 #ifdef DEBUG
5996 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5997 #endif
5998
5999 htab = ppc_elf_hash_table (info);
6000 BFD_ASSERT (htab->elf.dynobj != NULL);
6001
6002 if (elf_hash_table (info)->dynamic_sections_created)
6003 {
6004 /* Set the contents of the .interp section to the interpreter. */
6005 if (info->executable)
6006 {
6007 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6008 BFD_ASSERT (s != NULL);
6009 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6010 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6011 }
6012 }
6013
6014 if (htab->plt_type == PLT_OLD)
6015 htab->got_header_size = 16;
6016 else if (htab->plt_type == PLT_NEW)
6017 htab->got_header_size = 12;
6018
6019 /* Set up .got offsets for local syms, and space for local dynamic
6020 relocs. */
6021 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6022 {
6023 bfd_signed_vma *local_got;
6024 bfd_signed_vma *end_local_got;
6025 struct plt_entry **local_plt;
6026 struct plt_entry **end_local_plt;
6027 char *lgot_masks;
6028 bfd_size_type locsymcount;
6029 Elf_Internal_Shdr *symtab_hdr;
6030
6031 if (!is_ppc_elf (ibfd))
6032 continue;
6033
6034 for (s = ibfd->sections; s != NULL; s = s->next)
6035 {
6036 struct elf_dyn_relocs *p;
6037
6038 for (p = ((struct elf_dyn_relocs *)
6039 elf_section_data (s)->local_dynrel);
6040 p != NULL;
6041 p = p->next)
6042 {
6043 if (!bfd_is_abs_section (p->sec)
6044 && bfd_is_abs_section (p->sec->output_section))
6045 {
6046 /* Input section has been discarded, either because
6047 it is a copy of a linkonce section or due to
6048 linker script /DISCARD/, so we'll be discarding
6049 the relocs too. */
6050 }
6051 else if (htab->is_vxworks
6052 && strcmp (p->sec->output_section->name,
6053 ".tls_vars") == 0)
6054 {
6055 /* Relocations in vxworks .tls_vars sections are
6056 handled specially by the loader. */
6057 }
6058 else if (p->count != 0)
6059 {
6060 asection *sreloc = elf_section_data (p->sec)->sreloc;
6061 if (!htab->elf.dynamic_sections_created)
6062 sreloc = htab->reliplt;
6063 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6064 if ((p->sec->output_section->flags
6065 & (SEC_READONLY | SEC_ALLOC))
6066 == (SEC_READONLY | SEC_ALLOC))
6067 info->flags |= DF_TEXTREL;
6068 }
6069 }
6070 }
6071
6072 local_got = elf_local_got_refcounts (ibfd);
6073 if (!local_got)
6074 continue;
6075
6076 symtab_hdr = &elf_symtab_hdr (ibfd);
6077 locsymcount = symtab_hdr->sh_info;
6078 end_local_got = local_got + locsymcount;
6079 local_plt = (struct plt_entry **) end_local_got;
6080 end_local_plt = local_plt + locsymcount;
6081 lgot_masks = (char *) end_local_plt;
6082
6083 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6084 if (*local_got > 0)
6085 {
6086 unsigned int need = 0;
6087 if ((*lgot_masks & TLS_TLS) != 0)
6088 {
6089 if ((*lgot_masks & TLS_GD) != 0)
6090 need += 8;
6091 if ((*lgot_masks & TLS_LD) != 0)
6092 htab->tlsld_got.refcount += 1;
6093 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6094 need += 4;
6095 if ((*lgot_masks & TLS_DTPREL) != 0)
6096 need += 4;
6097 }
6098 else
6099 need += 4;
6100 if (need == 0)
6101 *local_got = (bfd_vma) -1;
6102 else
6103 {
6104 *local_got = allocate_got (htab, need);
6105 if (info->shared)
6106 htab->relgot->size += (need
6107 * (sizeof (Elf32_External_Rela) / 4));
6108 }
6109 }
6110 else
6111 *local_got = (bfd_vma) -1;
6112
6113 if (htab->is_vxworks)
6114 continue;
6115
6116 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6117 for (; local_plt < end_local_plt; ++local_plt)
6118 {
6119 struct plt_entry *ent;
6120 bfd_boolean doneone = FALSE;
6121 bfd_vma plt_offset = 0, glink_offset = 0;
6122
6123 for (ent = *local_plt; ent != NULL; ent = ent->next)
6124 if (ent->plt.refcount > 0)
6125 {
6126 s = htab->iplt;
6127
6128 if (!doneone)
6129 {
6130 plt_offset = s->size;
6131 s->size += 4;
6132 }
6133 ent->plt.offset = plt_offset;
6134
6135 s = htab->glink;
6136 if (!doneone || info->shared)
6137 {
6138 glink_offset = s->size;
6139 s->size += GLINK_ENTRY_SIZE;
6140 }
6141 ent->glink_offset = glink_offset;
6142
6143 if (!doneone)
6144 {
6145 htab->reliplt->size += sizeof (Elf32_External_Rela);
6146 doneone = TRUE;
6147 }
6148 }
6149 else
6150 ent->plt.offset = (bfd_vma) -1;
6151 }
6152 }
6153
6154 /* Allocate space for global sym dynamic relocs. */
6155 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6156
6157 if (htab->tlsld_got.refcount > 0)
6158 {
6159 htab->tlsld_got.offset = allocate_got (htab, 8);
6160 if (info->shared)
6161 htab->relgot->size += sizeof (Elf32_External_Rela);
6162 }
6163 else
6164 htab->tlsld_got.offset = (bfd_vma) -1;
6165
6166 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6167 {
6168 unsigned int g_o_t = 32768;
6169
6170 /* If we haven't allocated the header, do so now. When we get here,
6171 for old plt/got the got size will be 0 to 32764 (not allocated),
6172 or 32780 to 65536 (header allocated). For new plt/got, the
6173 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6174 if (htab->got->size <= 32768)
6175 {
6176 g_o_t = htab->got->size;
6177 if (htab->plt_type == PLT_OLD)
6178 g_o_t += 4;
6179 htab->got->size += htab->got_header_size;
6180 }
6181
6182 htab->elf.hgot->root.u.def.value = g_o_t;
6183 }
6184 if (info->shared)
6185 {
6186 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6187 if (sda != NULL
6188 && !(sda->root.type == bfd_link_hash_defined
6189 || sda->root.type == bfd_link_hash_defweak))
6190 {
6191 sda->root.type = bfd_link_hash_defined;
6192 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6193 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6194 }
6195 }
6196
6197 if (htab->glink != NULL
6198 && htab->glink->size != 0
6199 && htab->elf.dynamic_sections_created)
6200 {
6201 htab->glink_pltresolve = htab->glink->size;
6202 /* Space for the branch table. */
6203 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6204 /* Pad out to align the start of PLTresolve. */
6205 htab->glink->size += -htab->glink->size & 15;
6206 htab->glink->size += GLINK_PLTRESOLVE;
6207
6208 if (htab->emit_stub_syms)
6209 {
6210 struct elf_link_hash_entry *sh;
6211 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6212 TRUE, FALSE, FALSE);
6213 if (sh == NULL)
6214 return FALSE;
6215 if (sh->root.type == bfd_link_hash_new)
6216 {
6217 sh->root.type = bfd_link_hash_defined;
6218 sh->root.u.def.section = htab->glink;
6219 sh->root.u.def.value = htab->glink_pltresolve;
6220 sh->ref_regular = 1;
6221 sh->def_regular = 1;
6222 sh->ref_regular_nonweak = 1;
6223 sh->forced_local = 1;
6224 sh->non_elf = 0;
6225 }
6226 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6227 TRUE, FALSE, FALSE);
6228 if (sh == NULL)
6229 return FALSE;
6230 if (sh->root.type == bfd_link_hash_new)
6231 {
6232 sh->root.type = bfd_link_hash_defined;
6233 sh->root.u.def.section = htab->glink;
6234 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6235 sh->ref_regular = 1;
6236 sh->def_regular = 1;
6237 sh->ref_regular_nonweak = 1;
6238 sh->forced_local = 1;
6239 sh->non_elf = 0;
6240 }
6241 }
6242 }
6243
6244 if (htab->glink != NULL
6245 && htab->glink->size != 0
6246 && htab->glink_eh_frame != NULL
6247 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6248 && _bfd_elf_eh_frame_present (info))
6249 {
6250 s = htab->glink_eh_frame;
6251 s->size = sizeof (glink_eh_frame_cie) + 20;
6252 if (info->shared)
6253 {
6254 s->size += 4;
6255 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6256 s->size += 4;
6257 }
6258 }
6259
6260 /* We've now determined the sizes of the various dynamic sections.
6261 Allocate memory for them. */
6262 relocs = FALSE;
6263 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6264 {
6265 bfd_boolean strip_section = TRUE;
6266
6267 if ((s->flags & SEC_LINKER_CREATED) == 0)
6268 continue;
6269
6270 if (s == htab->plt
6271 || s == htab->got)
6272 {
6273 /* We'd like to strip these sections if they aren't needed, but if
6274 we've exported dynamic symbols from them we must leave them.
6275 It's too late to tell BFD to get rid of the symbols. */
6276 if (htab->elf.hplt != NULL)
6277 strip_section = FALSE;
6278 /* Strip this section if we don't need it; see the
6279 comment below. */
6280 }
6281 else if (s == htab->iplt
6282 || s == htab->glink
6283 || s == htab->glink_eh_frame
6284 || s == htab->sgotplt
6285 || s == htab->sbss
6286 || s == htab->dynbss
6287 || s == htab->dynsbss
6288 || s == htab->sdata[0].section
6289 || s == htab->sdata[1].section)
6290 {
6291 /* Strip these too. */
6292 }
6293 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6294 ".rela"))
6295 {
6296 if (s->size != 0)
6297 {
6298 /* Remember whether there are any relocation sections. */
6299 relocs = TRUE;
6300
6301 /* We use the reloc_count field as a counter if we need
6302 to copy relocs into the output file. */
6303 s->reloc_count = 0;
6304 }
6305 }
6306 else
6307 {
6308 /* It's not one of our sections, so don't allocate space. */
6309 continue;
6310 }
6311
6312 if (s->size == 0 && strip_section)
6313 {
6314 /* If we don't need this section, strip it from the
6315 output file. This is mostly to handle .rela.bss and
6316 .rela.plt. We must create both sections in
6317 create_dynamic_sections, because they must be created
6318 before the linker maps input sections to output
6319 sections. The linker does that before
6320 adjust_dynamic_symbol is called, and it is that
6321 function which decides whether anything needs to go
6322 into these sections. */
6323 s->flags |= SEC_EXCLUDE;
6324 continue;
6325 }
6326
6327 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6328 continue;
6329
6330 /* Allocate memory for the section contents. */
6331 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6332 if (s->contents == NULL)
6333 return FALSE;
6334 }
6335
6336 if (htab->elf.dynamic_sections_created)
6337 {
6338 /* Add some entries to the .dynamic section. We fill in the
6339 values later, in ppc_elf_finish_dynamic_sections, but we
6340 must add the entries now so that we get the correct size for
6341 the .dynamic section. The DT_DEBUG entry is filled in by the
6342 dynamic linker and used by the debugger. */
6343 #define add_dynamic_entry(TAG, VAL) \
6344 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6345
6346 if (info->executable)
6347 {
6348 if (!add_dynamic_entry (DT_DEBUG, 0))
6349 return FALSE;
6350 }
6351
6352 if (htab->plt != NULL && htab->plt->size != 0)
6353 {
6354 if (!add_dynamic_entry (DT_PLTGOT, 0)
6355 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6356 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6357 || !add_dynamic_entry (DT_JMPREL, 0))
6358 return FALSE;
6359 }
6360
6361 if (htab->glink != NULL && htab->glink->size != 0)
6362 {
6363 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6364 return FALSE;
6365 if (!htab->no_tls_get_addr_opt
6366 && htab->tls_get_addr != NULL
6367 && htab->tls_get_addr->plt.plist != NULL
6368 && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
6369 return FALSE;
6370 }
6371
6372 if (relocs)
6373 {
6374 if (!add_dynamic_entry (DT_RELA, 0)
6375 || !add_dynamic_entry (DT_RELASZ, 0)
6376 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6377 return FALSE;
6378 }
6379
6380 /* If any dynamic relocs apply to a read-only section, then we
6381 need a DT_TEXTREL entry. */
6382 if ((info->flags & DF_TEXTREL) == 0)
6383 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6384 info);
6385
6386 if ((info->flags & DF_TEXTREL) != 0)
6387 {
6388 if (!add_dynamic_entry (DT_TEXTREL, 0))
6389 return FALSE;
6390 }
6391 if (htab->is_vxworks
6392 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6393 return FALSE;
6394 }
6395 #undef add_dynamic_entry
6396
6397 if (htab->glink_eh_frame != NULL
6398 && htab->glink_eh_frame->contents != NULL)
6399 {
6400 unsigned char *p = htab->glink_eh_frame->contents;
6401 bfd_vma val;
6402
6403 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6404 /* CIE length (rewrite in case little-endian). */
6405 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6406 p += sizeof (glink_eh_frame_cie);
6407 /* FDE length. */
6408 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6409 bfd_put_32 (htab->elf.dynobj, val, p);
6410 p += 4;
6411 /* CIE pointer. */
6412 val = p - htab->glink_eh_frame->contents;
6413 bfd_put_32 (htab->elf.dynobj, val, p);
6414 p += 4;
6415 /* Offset to .glink. Set later. */
6416 p += 4;
6417 /* .glink size. */
6418 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6419 p += 4;
6420 /* Augmentation. */
6421 p += 1;
6422
6423 if (info->shared
6424 && htab->elf.dynamic_sections_created)
6425 {
6426 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6427 if (adv < 64)
6428 *p++ = DW_CFA_advance_loc + adv;
6429 else if (adv < 256)
6430 {
6431 *p++ = DW_CFA_advance_loc1;
6432 *p++ = adv;
6433 }
6434 else if (adv < 65536)
6435 {
6436 *p++ = DW_CFA_advance_loc2;
6437 bfd_put_16 (htab->elf.dynobj, adv, p);
6438 p += 2;
6439 }
6440 else
6441 {
6442 *p++ = DW_CFA_advance_loc4;
6443 bfd_put_32 (htab->elf.dynobj, adv, p);
6444 p += 4;
6445 }
6446 *p++ = DW_CFA_register;
6447 *p++ = 65;
6448 p++;
6449 *p++ = DW_CFA_advance_loc + 4;
6450 *p++ = DW_CFA_restore_extended;
6451 *p++ = 65;
6452 }
6453 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6454 == htab->glink_eh_frame->size);
6455 }
6456
6457 return TRUE;
6458 }
6459
6460 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6461
6462 static bfd_boolean
6463 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6464 {
6465 if (h->plt.plist != NULL
6466 && !h->def_regular
6467 && (!h->pointer_equality_needed
6468 || !h->ref_regular_nonweak))
6469 return FALSE;
6470
6471 return _bfd_elf_hash_symbol (h);
6472 }
6473 \f
6474 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6475
6476 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6477 used for some functions that are allowed to break the ABI). */
6478 static const int shared_stub_entry[] =
6479 {
6480 0x7c0802a6, /* mflr 0 */
6481 0x429f0005, /* bcl 20, 31, .Lxxx */
6482 0x7d8802a6, /* mflr 12 */
6483 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6484 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
6485 0x7c0803a6, /* mtlr 0 */
6486 0x7d8903a6, /* mtctr 12 */
6487 0x4e800420, /* bctr */
6488 };
6489
6490 static const int stub_entry[] =
6491 {
6492 0x3d800000, /* lis 12,xxx@ha */
6493 0x398c0000, /* addi 12,12,xxx@l */
6494 0x7d8903a6, /* mtctr 12 */
6495 0x4e800420, /* bctr */
6496 };
6497
6498 static bfd_boolean
6499 ppc_elf_relax_section (bfd *abfd,
6500 asection *isec,
6501 struct bfd_link_info *link_info,
6502 bfd_boolean *again)
6503 {
6504 struct one_fixup
6505 {
6506 struct one_fixup *next;
6507 asection *tsec;
6508 /* Final link, can use the symbol offset. For a
6509 relocatable link we use the symbol's index. */
6510 bfd_vma toff;
6511 bfd_vma trampoff;
6512 };
6513
6514 Elf_Internal_Shdr *symtab_hdr;
6515 bfd_byte *contents = NULL;
6516 Elf_Internal_Sym *isymbuf = NULL;
6517 Elf_Internal_Rela *internal_relocs = NULL;
6518 Elf_Internal_Rela *irel, *irelend;
6519 struct one_fixup *fixups = NULL;
6520 unsigned changes = 0;
6521 struct ppc_elf_link_hash_table *htab;
6522 bfd_size_type trampoff;
6523 asection *got2;
6524 bfd_boolean maybe_pasted;
6525
6526 *again = FALSE;
6527
6528 /* Nothing to do if there are no relocations, and no need to do
6529 anything with non-alloc or non-code sections. */
6530 if ((isec->flags & SEC_ALLOC) == 0
6531 || (isec->flags & SEC_CODE) == 0
6532 || (isec->flags & SEC_RELOC) == 0
6533 || isec->reloc_count == 0)
6534 return TRUE;
6535
6536 /* We cannot represent the required PIC relocs in the output, so don't
6537 do anything. The linker doesn't support mixing -shared and -r
6538 anyway. */
6539 if (link_info->relocatable && link_info->shared)
6540 return TRUE;
6541
6542 trampoff = (isec->size + 3) & (bfd_vma) -4;
6543 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6544 || strcmp (isec->output_section->name, ".fini") == 0);
6545 /* Space for a branch around any trampolines. */
6546 if (maybe_pasted)
6547 trampoff += 4;
6548
6549 symtab_hdr = &elf_symtab_hdr (abfd);
6550
6551 /* Get a copy of the native relocations. */
6552 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6553 link_info->keep_memory);
6554 if (internal_relocs == NULL)
6555 goto error_return;
6556
6557 htab = ppc_elf_hash_table (link_info);
6558 got2 = bfd_get_section_by_name (abfd, ".got2");
6559
6560 irelend = internal_relocs + isec->reloc_count;
6561 for (irel = internal_relocs; irel < irelend; irel++)
6562 {
6563 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6564 bfd_vma toff, roff;
6565 asection *tsec;
6566 struct one_fixup *f;
6567 size_t insn_offset = 0;
6568 bfd_vma max_branch_offset, val;
6569 bfd_byte *hit_addr;
6570 unsigned long t0;
6571 struct elf_link_hash_entry *h;
6572 struct plt_entry **plist;
6573 unsigned char sym_type;
6574
6575 switch (r_type)
6576 {
6577 case R_PPC_REL24:
6578 case R_PPC_LOCAL24PC:
6579 case R_PPC_PLTREL24:
6580 max_branch_offset = 1 << 25;
6581 break;
6582
6583 case R_PPC_REL14:
6584 case R_PPC_REL14_BRTAKEN:
6585 case R_PPC_REL14_BRNTAKEN:
6586 max_branch_offset = 1 << 15;
6587 break;
6588
6589 default:
6590 continue;
6591 }
6592
6593 /* Get the value of the symbol referred to by the reloc. */
6594 h = NULL;
6595 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6596 {
6597 /* A local symbol. */
6598 Elf_Internal_Sym *isym;
6599
6600 /* Read this BFD's local symbols. */
6601 if (isymbuf == NULL)
6602 {
6603 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6604 if (isymbuf == NULL)
6605 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6606 symtab_hdr->sh_info, 0,
6607 NULL, NULL, NULL);
6608 if (isymbuf == 0)
6609 goto error_return;
6610 }
6611 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6612 if (isym->st_shndx == SHN_UNDEF)
6613 tsec = bfd_und_section_ptr;
6614 else if (isym->st_shndx == SHN_ABS)
6615 tsec = bfd_abs_section_ptr;
6616 else if (isym->st_shndx == SHN_COMMON)
6617 tsec = bfd_com_section_ptr;
6618 else
6619 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6620
6621 toff = isym->st_value;
6622 sym_type = ELF_ST_TYPE (isym->st_info);
6623 }
6624 else
6625 {
6626 /* Global symbol handling. */
6627 unsigned long indx;
6628
6629 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6630 h = elf_sym_hashes (abfd)[indx];
6631
6632 while (h->root.type == bfd_link_hash_indirect
6633 || h->root.type == bfd_link_hash_warning)
6634 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6635
6636 if (h->root.type == bfd_link_hash_defined
6637 || h->root.type == bfd_link_hash_defweak)
6638 {
6639 tsec = h->root.u.def.section;
6640 toff = h->root.u.def.value;
6641 }
6642 else if (h->root.type == bfd_link_hash_undefined
6643 || h->root.type == bfd_link_hash_undefweak)
6644 {
6645 tsec = bfd_und_section_ptr;
6646 toff = link_info->relocatable ? indx : 0;
6647 }
6648 else
6649 continue;
6650
6651 sym_type = h->type;
6652 }
6653
6654 /* The condition here under which we call find_plt_ent must
6655 match that in relocate_section. If we call find_plt_ent here
6656 but not in relocate_section, or vice versa, then the branch
6657 destination used here may be incorrect. */
6658 plist = NULL;
6659 if (h != NULL)
6660 {
6661 /* We know is_branch_reloc (r_type) is true. */
6662 if (h->type == STT_GNU_IFUNC
6663 || r_type == R_PPC_PLTREL24)
6664 plist = &h->plt.plist;
6665 }
6666 else if (sym_type == STT_GNU_IFUNC
6667 && elf_local_got_offsets (abfd) != NULL)
6668 {
6669 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6670 struct plt_entry **local_plt = (struct plt_entry **)
6671 (local_got_offsets + symtab_hdr->sh_info);
6672 plist = local_plt + ELF32_R_SYM (irel->r_info);
6673 }
6674 if (plist != NULL)
6675 {
6676 bfd_vma addend = 0;
6677 struct plt_entry *ent;
6678
6679 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6680 addend = irel->r_addend;
6681 ent = find_plt_ent (plist, got2, addend);
6682 if (ent != NULL)
6683 {
6684 if (htab->plt_type == PLT_NEW
6685 || h == NULL
6686 || !htab->elf.dynamic_sections_created
6687 || h->dynindx == -1)
6688 {
6689 tsec = htab->glink;
6690 toff = ent->glink_offset;
6691 }
6692 else
6693 {
6694 tsec = htab->plt;
6695 toff = ent->plt.offset;
6696 }
6697 }
6698 }
6699
6700 /* If the branch and target are in the same section, you have
6701 no hope of adding stubs. We'll error out later should the
6702 branch overflow. */
6703 if (tsec == isec)
6704 continue;
6705
6706 /* There probably isn't any reason to handle symbols in
6707 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6708 attribute for a code section, and we are only looking at
6709 branches. However, implement it correctly here as a
6710 reference for other target relax_section functions. */
6711 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6712 {
6713 /* At this stage in linking, no SEC_MERGE symbol has been
6714 adjusted, so all references to such symbols need to be
6715 passed through _bfd_merged_section_offset. (Later, in
6716 relocate_section, all SEC_MERGE symbols *except* for
6717 section symbols have been adjusted.)
6718
6719 gas may reduce relocations against symbols in SEC_MERGE
6720 sections to a relocation against the section symbol when
6721 the original addend was zero. When the reloc is against
6722 a section symbol we should include the addend in the
6723 offset passed to _bfd_merged_section_offset, since the
6724 location of interest is the original symbol. On the
6725 other hand, an access to "sym+addend" where "sym" is not
6726 a section symbol should not include the addend; Such an
6727 access is presumed to be an offset from "sym"; The
6728 location of interest is just "sym". */
6729 if (sym_type == STT_SECTION)
6730 toff += irel->r_addend;
6731
6732 toff = _bfd_merged_section_offset (abfd, &tsec,
6733 elf_section_data (tsec)->sec_info,
6734 toff);
6735
6736 if (sym_type != STT_SECTION)
6737 toff += irel->r_addend;
6738 }
6739 /* PLTREL24 addends are special. */
6740 else if (r_type != R_PPC_PLTREL24)
6741 toff += irel->r_addend;
6742
6743 /* Attempted -shared link of non-pic code loses. */
6744 if (tsec->output_section == NULL)
6745 continue;
6746
6747 roff = irel->r_offset;
6748
6749 /* If the branch is in range, no need to do anything. */
6750 if (tsec != bfd_und_section_ptr
6751 && (!link_info->relocatable
6752 /* A relocatable link may have sections moved during
6753 final link, so do not presume they remain in range. */
6754 || tsec->output_section == isec->output_section))
6755 {
6756 bfd_vma symaddr, reladdr;
6757
6758 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6759 reladdr = isec->output_section->vma + isec->output_offset + roff;
6760 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6761 continue;
6762 }
6763
6764 /* Look for an existing fixup to this address. */
6765 for (f = fixups; f ; f = f->next)
6766 if (f->tsec == tsec && f->toff == toff)
6767 break;
6768
6769 if (f == NULL)
6770 {
6771 size_t size;
6772 unsigned long stub_rtype;
6773
6774 val = trampoff - roff;
6775 if (val >= max_branch_offset)
6776 /* Oh dear, we can't reach a trampoline. Don't try to add
6777 one. We'll report an error later. */
6778 continue;
6779
6780 if (link_info->shared)
6781 {
6782 size = 4 * ARRAY_SIZE (shared_stub_entry);
6783 insn_offset = 12;
6784 }
6785 else
6786 {
6787 size = 4 * ARRAY_SIZE (stub_entry);
6788 insn_offset = 0;
6789 }
6790 stub_rtype = R_PPC_RELAX;
6791 if (tsec == htab->plt
6792 || tsec == htab->glink)
6793 {
6794 stub_rtype = R_PPC_RELAX_PLT;
6795 if (r_type == R_PPC_PLTREL24)
6796 stub_rtype = R_PPC_RELAX_PLTREL24;
6797 }
6798
6799 /* Hijack the old relocation. Since we need two
6800 relocations for this use a "composite" reloc. */
6801 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6802 stub_rtype);
6803 irel->r_offset = trampoff + insn_offset;
6804 if (r_type == R_PPC_PLTREL24
6805 && stub_rtype != R_PPC_RELAX_PLTREL24)
6806 irel->r_addend = 0;
6807
6808 /* Record the fixup so we don't do it again this section. */
6809 f = bfd_malloc (sizeof (*f));
6810 f->next = fixups;
6811 f->tsec = tsec;
6812 f->toff = toff;
6813 f->trampoff = trampoff;
6814 fixups = f;
6815
6816 trampoff += size;
6817 changes++;
6818 }
6819 else
6820 {
6821 val = f->trampoff - roff;
6822 if (val >= max_branch_offset)
6823 continue;
6824
6825 /* Nop out the reloc, since we're finalizing things here. */
6826 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6827 }
6828
6829 /* Get the section contents. */
6830 if (contents == NULL)
6831 {
6832 /* Get cached copy if it exists. */
6833 if (elf_section_data (isec)->this_hdr.contents != NULL)
6834 contents = elf_section_data (isec)->this_hdr.contents;
6835 else
6836 {
6837 /* Go get them off disk. */
6838 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6839 goto error_return;
6840 }
6841 }
6842
6843 /* Fix up the existing branch to hit the trampoline. */
6844 hit_addr = contents + roff;
6845 switch (r_type)
6846 {
6847 case R_PPC_REL24:
6848 case R_PPC_LOCAL24PC:
6849 case R_PPC_PLTREL24:
6850 t0 = bfd_get_32 (abfd, hit_addr);
6851 t0 &= ~0x3fffffc;
6852 t0 |= val & 0x3fffffc;
6853 bfd_put_32 (abfd, t0, hit_addr);
6854 break;
6855
6856 case R_PPC_REL14:
6857 case R_PPC_REL14_BRTAKEN:
6858 case R_PPC_REL14_BRNTAKEN:
6859 t0 = bfd_get_32 (abfd, hit_addr);
6860 t0 &= ~0xfffc;
6861 t0 |= val & 0xfffc;
6862 bfd_put_32 (abfd, t0, hit_addr);
6863 break;
6864 }
6865 }
6866
6867 /* Write out the trampolines. */
6868 if (fixups != NULL)
6869 {
6870 const int *stub;
6871 bfd_byte *dest;
6872 int i, size;
6873
6874 do
6875 {
6876 struct one_fixup *f = fixups;
6877 fixups = fixups->next;
6878 free (f);
6879 }
6880 while (fixups);
6881
6882 contents = bfd_realloc_or_free (contents, trampoff);
6883 if (contents == NULL)
6884 goto error_return;
6885
6886 isec->size = (isec->size + 3) & (bfd_vma) -4;
6887 dest = contents + isec->size;
6888 /* Branch around the trampolines. */
6889 if (maybe_pasted)
6890 {
6891 bfd_vma val = B + trampoff - isec->size;
6892 bfd_put_32 (abfd, val, dest);
6893 dest += 4;
6894 }
6895 isec->size = trampoff;
6896
6897 if (link_info->shared)
6898 {
6899 stub = shared_stub_entry;
6900 size = ARRAY_SIZE (shared_stub_entry);
6901 }
6902 else
6903 {
6904 stub = stub_entry;
6905 size = ARRAY_SIZE (stub_entry);
6906 }
6907
6908 i = 0;
6909 while (dest < contents + trampoff)
6910 {
6911 bfd_put_32 (abfd, stub[i], dest);
6912 i++;
6913 if (i == size)
6914 i = 0;
6915 dest += 4;
6916 }
6917 BFD_ASSERT (i == 0);
6918 }
6919
6920 if (isymbuf != NULL
6921 && symtab_hdr->contents != (unsigned char *) isymbuf)
6922 {
6923 if (! link_info->keep_memory)
6924 free (isymbuf);
6925 else
6926 {
6927 /* Cache the symbols for elf_link_input_bfd. */
6928 symtab_hdr->contents = (unsigned char *) isymbuf;
6929 }
6930 }
6931
6932 if (contents != NULL
6933 && elf_section_data (isec)->this_hdr.contents != contents)
6934 {
6935 if (!changes && !link_info->keep_memory)
6936 free (contents);
6937 else
6938 {
6939 /* Cache the section contents for elf_link_input_bfd. */
6940 elf_section_data (isec)->this_hdr.contents = contents;
6941 }
6942 }
6943
6944 if (changes != 0)
6945 {
6946 /* Append sufficient NOP relocs so we can write out relocation
6947 information for the trampolines. */
6948 Elf_Internal_Shdr *rel_hdr;
6949 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
6950 * sizeof (*new_relocs));
6951 unsigned ix;
6952
6953 if (!new_relocs)
6954 goto error_return;
6955 memcpy (new_relocs, internal_relocs,
6956 isec->reloc_count * sizeof (*new_relocs));
6957 for (ix = changes; ix--;)
6958 {
6959 irel = new_relocs + ix + isec->reloc_count;
6960
6961 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6962 }
6963 if (internal_relocs != elf_section_data (isec)->relocs)
6964 free (internal_relocs);
6965 elf_section_data (isec)->relocs = new_relocs;
6966 isec->reloc_count += changes;
6967 rel_hdr = _bfd_elf_single_rel_hdr (isec);
6968 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
6969 }
6970 else if (elf_section_data (isec)->relocs != internal_relocs)
6971 free (internal_relocs);
6972
6973 *again = changes != 0;
6974 if (!*again && link_info->relocatable)
6975 {
6976 /* Convert the internal relax relocs to external form. */
6977 for (irel = internal_relocs; irel < irelend; irel++)
6978 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
6979 {
6980 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
6981
6982 /* Rewrite the reloc and convert one of the trailing nop
6983 relocs to describe this relocation. */
6984 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
6985 /* The relocs are at the bottom 2 bytes */
6986 irel[0].r_offset += 2;
6987 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
6988 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
6989 irel[1].r_offset += 4;
6990 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
6991 irel++;
6992 }
6993 }
6994
6995 return TRUE;
6996
6997 error_return:
6998 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
6999 free (isymbuf);
7000 if (contents != NULL
7001 && elf_section_data (isec)->this_hdr.contents != contents)
7002 free (contents);
7003 if (internal_relocs != NULL
7004 && elf_section_data (isec)->relocs != internal_relocs)
7005 free (internal_relocs);
7006 return FALSE;
7007 }
7008 \f
7009 /* What to do when ld finds relocations against symbols defined in
7010 discarded sections. */
7011
7012 static unsigned int
7013 ppc_elf_action_discarded (asection *sec)
7014 {
7015 if (strcmp (".fixup", sec->name) == 0)
7016 return 0;
7017
7018 if (strcmp (".got2", sec->name) == 0)
7019 return 0;
7020
7021 return _bfd_elf_default_action_discarded (sec);
7022 }
7023 \f
7024 /* Fill in the address for a pointer generated in a linker section. */
7025
7026 static bfd_vma
7027 elf_finish_pointer_linker_section (bfd *input_bfd,
7028 elf_linker_section_t *lsect,
7029 struct elf_link_hash_entry *h,
7030 bfd_vma relocation,
7031 const Elf_Internal_Rela *rel)
7032 {
7033 elf_linker_section_pointers_t *linker_section_ptr;
7034
7035 BFD_ASSERT (lsect != NULL);
7036
7037 if (h != NULL)
7038 {
7039 /* Handle global symbol. */
7040 struct ppc_elf_link_hash_entry *eh;
7041
7042 eh = (struct ppc_elf_link_hash_entry *) h;
7043 BFD_ASSERT (eh->elf.def_regular);
7044 linker_section_ptr = eh->linker_section_pointer;
7045 }
7046 else
7047 {
7048 /* Handle local symbol. */
7049 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7050
7051 BFD_ASSERT (is_ppc_elf (input_bfd));
7052 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7053 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7054 }
7055
7056 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7057 rel->r_addend,
7058 lsect);
7059 BFD_ASSERT (linker_section_ptr != NULL);
7060
7061 /* Offset will always be a multiple of four, so use the bottom bit
7062 as a "written" flag. */
7063 if ((linker_section_ptr->offset & 1) == 0)
7064 {
7065 bfd_put_32 (lsect->section->owner,
7066 relocation + linker_section_ptr->addend,
7067 lsect->section->contents + linker_section_ptr->offset);
7068 linker_section_ptr->offset += 1;
7069 }
7070
7071 relocation = (lsect->section->output_section->vma
7072 + lsect->section->output_offset
7073 + linker_section_ptr->offset - 1
7074 - SYM_VAL (lsect->sym));
7075
7076 #ifdef DEBUG
7077 fprintf (stderr,
7078 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7079 lsect->name, (long) relocation, (long) relocation);
7080 #endif
7081
7082 return relocation;
7083 }
7084
7085 #define PPC_LO(v) ((v) & 0xffff)
7086 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7087 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7088
7089 static void
7090 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7091 struct bfd_link_info *info)
7092 {
7093 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7094 bfd *output_bfd = info->output_bfd;
7095 bfd_vma plt;
7096
7097 plt = ((ent->plt.offset & ~1)
7098 + plt_sec->output_section->vma
7099 + plt_sec->output_offset);
7100
7101 if (info->shared)
7102 {
7103 bfd_vma got = 0;
7104
7105 if (ent->addend >= 32768)
7106 got = (ent->addend
7107 + ent->sec->output_section->vma
7108 + ent->sec->output_offset);
7109 else if (htab->elf.hgot != NULL)
7110 got = SYM_VAL (htab->elf.hgot);
7111
7112 plt -= got;
7113
7114 if (plt + 0x8000 < 0x10000)
7115 {
7116 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7117 p += 4;
7118 bfd_put_32 (output_bfd, MTCTR_11, p);
7119 p += 4;
7120 bfd_put_32 (output_bfd, BCTR, p);
7121 p += 4;
7122 bfd_put_32 (output_bfd, NOP, p);
7123 p += 4;
7124 }
7125 else
7126 {
7127 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7128 p += 4;
7129 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7130 p += 4;
7131 bfd_put_32 (output_bfd, MTCTR_11, p);
7132 p += 4;
7133 bfd_put_32 (output_bfd, BCTR, p);
7134 p += 4;
7135 }
7136 }
7137 else
7138 {
7139 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7140 p += 4;
7141 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7142 p += 4;
7143 bfd_put_32 (output_bfd, MTCTR_11, p);
7144 p += 4;
7145 bfd_put_32 (output_bfd, BCTR, p);
7146 p += 4;
7147 }
7148 }
7149
7150 /* Return true if symbol is defined statically. */
7151
7152 static bfd_boolean
7153 is_static_defined (struct elf_link_hash_entry *h)
7154 {
7155 return ((h->root.type == bfd_link_hash_defined
7156 || h->root.type == bfd_link_hash_defweak)
7157 && h->root.u.def.section != NULL
7158 && h->root.u.def.section->output_section != NULL);
7159 }
7160
7161 /* If INSN is an opcode that may be used with an @tls operand, return
7162 the transformed insn for TLS optimisation, otherwise return 0. If
7163 REG is non-zero only match an insn with RB or RA equal to REG. */
7164
7165 unsigned int
7166 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7167 {
7168 unsigned int rtra;
7169
7170 if ((insn & (0x3f << 26)) != 31 << 26)
7171 return 0;
7172
7173 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7174 rtra = insn & ((1 << 26) - (1 << 16));
7175 else if (((insn >> 16) & 0x1f) == reg)
7176 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7177 else
7178 return 0;
7179
7180 if ((insn & (0x3ff << 1)) == 266 << 1)
7181 /* add -> addi. */
7182 insn = 14 << 26;
7183 else if ((insn & (0x1f << 1)) == 23 << 1
7184 && ((insn & (0x1f << 6)) < 14 << 6
7185 || ((insn & (0x1f << 6)) >= 16 << 6
7186 && (insn & (0x1f << 6)) < 24 << 6)))
7187 /* load and store indexed -> dform. */
7188 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7189 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7190 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7191 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7192 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7193 /* lwax -> lwa. */
7194 insn = (58 << 26) | 2;
7195 else
7196 return 0;
7197 insn |= rtra;
7198 return insn;
7199 }
7200
7201 /* If INSN is an opcode that may be used with an @tprel operand, return
7202 the transformed insn for an undefined weak symbol, ie. with the
7203 thread pointer REG operand removed. Otherwise return 0. */
7204
7205 unsigned int
7206 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7207 {
7208 if ((insn & (0x1f << 16)) == reg << 16
7209 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7210 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7211 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7212 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7213 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7214 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7215 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7216 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7217 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7218 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7219 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7220 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7221 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7222 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7223 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7224 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7225 && (insn & 3) != 1)
7226 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7227 && ((insn & 3) == 0 || (insn & 3) == 3))))
7228 {
7229 insn &= ~(0x1f << 16);
7230 }
7231 else if ((insn & (0x1f << 21)) == reg << 21
7232 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7233 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7234 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7235 {
7236 insn &= ~(0x1f << 21);
7237 insn |= (insn & (0x1f << 16)) << 5;
7238 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7239 insn -= 2 >> 26; /* convert to ori,oris */
7240 }
7241 else
7242 insn = 0;
7243 return insn;
7244 }
7245
7246 /* The RELOCATE_SECTION function is called by the ELF backend linker
7247 to handle the relocations for a section.
7248
7249 The relocs are always passed as Rela structures; if the section
7250 actually uses Rel structures, the r_addend field will always be
7251 zero.
7252
7253 This function is responsible for adjust the section contents as
7254 necessary, and (if using Rela relocs and generating a
7255 relocatable output file) adjusting the reloc addend as
7256 necessary.
7257
7258 This function does not have to worry about setting the reloc
7259 address or the reloc symbol index.
7260
7261 LOCAL_SYMS is a pointer to the swapped in local symbols.
7262
7263 LOCAL_SECTIONS is an array giving the section in the input file
7264 corresponding to the st_shndx field of each local symbol.
7265
7266 The global hash table entry for the global symbols can be found
7267 via elf_sym_hashes (input_bfd).
7268
7269 When generating relocatable output, this function must handle
7270 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7271 going to be the section symbol corresponding to the output
7272 section, which means that the addend must be adjusted
7273 accordingly. */
7274
7275 static bfd_boolean
7276 ppc_elf_relocate_section (bfd *output_bfd,
7277 struct bfd_link_info *info,
7278 bfd *input_bfd,
7279 asection *input_section,
7280 bfd_byte *contents,
7281 Elf_Internal_Rela *relocs,
7282 Elf_Internal_Sym *local_syms,
7283 asection **local_sections)
7284 {
7285 Elf_Internal_Shdr *symtab_hdr;
7286 struct elf_link_hash_entry **sym_hashes;
7287 struct ppc_elf_link_hash_table *htab;
7288 Elf_Internal_Rela *rel;
7289 Elf_Internal_Rela *relend;
7290 Elf_Internal_Rela outrel;
7291 asection *got2, *sreloc = NULL;
7292 bfd_vma *local_got_offsets;
7293 bfd_boolean ret = TRUE;
7294 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7295 bfd_boolean is_vxworks_tls;
7296
7297 #ifdef DEBUG
7298 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7299 "%ld relocations%s",
7300 input_bfd, input_section,
7301 (long) input_section->reloc_count,
7302 (info->relocatable) ? " (relocatable)" : "");
7303 #endif
7304
7305 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7306
7307 /* Initialize howto table if not already done. */
7308 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7309 ppc_elf_howto_init ();
7310
7311 htab = ppc_elf_hash_table (info);
7312 local_got_offsets = elf_local_got_offsets (input_bfd);
7313 symtab_hdr = &elf_symtab_hdr (input_bfd);
7314 sym_hashes = elf_sym_hashes (input_bfd);
7315 /* We have to handle relocations in vxworks .tls_vars sections
7316 specially, because the dynamic loader is 'weird'. */
7317 is_vxworks_tls = (htab->is_vxworks && info->shared
7318 && !strcmp (input_section->output_section->name,
7319 ".tls_vars"));
7320 rel = relocs;
7321 relend = relocs + input_section->reloc_count;
7322 for (; rel < relend; rel++)
7323 {
7324 enum elf_ppc_reloc_type r_type;
7325 bfd_vma addend;
7326 bfd_reloc_status_type r;
7327 Elf_Internal_Sym *sym;
7328 asection *sec;
7329 struct elf_link_hash_entry *h;
7330 const char *sym_name;
7331 reloc_howto_type *howto;
7332 unsigned long r_symndx;
7333 bfd_vma relocation;
7334 bfd_vma branch_bit, from;
7335 bfd_boolean unresolved_reloc;
7336 bfd_boolean warned;
7337 unsigned int tls_type, tls_mask, tls_gd;
7338 struct plt_entry **ifunc;
7339
7340 r_type = ELF32_R_TYPE (rel->r_info);
7341 sym = NULL;
7342 sec = NULL;
7343 h = NULL;
7344 unresolved_reloc = FALSE;
7345 warned = FALSE;
7346 r_symndx = ELF32_R_SYM (rel->r_info);
7347
7348 if (r_symndx < symtab_hdr->sh_info)
7349 {
7350 sym = local_syms + r_symndx;
7351 sec = local_sections[r_symndx];
7352 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7353
7354 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7355 }
7356 else
7357 {
7358 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7359 r_symndx, symtab_hdr, sym_hashes,
7360 h, sec, relocation,
7361 unresolved_reloc, warned);
7362
7363 sym_name = h->root.root.string;
7364 }
7365
7366 if (sec != NULL && discarded_section (sec))
7367 {
7368 /* For relocs against symbols from removed linkonce sections,
7369 or sections discarded by a linker script, we just want the
7370 section contents zeroed. Avoid any special processing. */
7371 howto = NULL;
7372 if (r_type < R_PPC_max)
7373 howto = ppc_elf_howto_table[r_type];
7374 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7375 rel, 1, relend, howto, 0, contents);
7376 }
7377
7378 if (info->relocatable)
7379 {
7380 if (got2 != NULL
7381 && r_type == R_PPC_PLTREL24
7382 && rel->r_addend >= 32768)
7383 {
7384 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7385 addend specifies the GOT pointer offset within .got2. */
7386 rel->r_addend += got2->output_offset;
7387 }
7388 continue;
7389 }
7390
7391 /* TLS optimizations. Replace instruction sequences and relocs
7392 based on information we collected in tls_optimize. We edit
7393 RELOCS so that --emit-relocs will output something sensible
7394 for the final instruction stream. */
7395 tls_mask = 0;
7396 tls_gd = 0;
7397 if (h != NULL)
7398 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7399 else if (local_got_offsets != NULL)
7400 {
7401 struct plt_entry **local_plt;
7402 char *lgot_masks;
7403 local_plt
7404 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7405 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7406 tls_mask = lgot_masks[r_symndx];
7407 }
7408
7409 /* Ensure reloc mapping code below stays sane. */
7410 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7411 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7412 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7413 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7414 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7415 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7416 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7417 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7418 abort ();
7419 switch (r_type)
7420 {
7421 default:
7422 break;
7423
7424 case R_PPC_GOT_TPREL16:
7425 case R_PPC_GOT_TPREL16_LO:
7426 if ((tls_mask & TLS_TLS) != 0
7427 && (tls_mask & TLS_TPREL) == 0)
7428 {
7429 bfd_vma insn;
7430
7431 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7432 insn &= 31 << 21;
7433 insn |= 0x3c020000; /* addis 0,2,0 */
7434 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7435 r_type = R_PPC_TPREL16_HA;
7436 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7437 }
7438 break;
7439
7440 case R_PPC_TLS:
7441 if ((tls_mask & TLS_TLS) != 0
7442 && (tls_mask & TLS_TPREL) == 0)
7443 {
7444 bfd_vma insn;
7445
7446 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7447 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7448 if (insn == 0)
7449 abort ();
7450 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7451 r_type = R_PPC_TPREL16_LO;
7452 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7453
7454 /* Was PPC_TLS which sits on insn boundary, now
7455 PPC_TPREL16_LO which is at low-order half-word. */
7456 rel->r_offset += d_offset;
7457 }
7458 break;
7459
7460 case R_PPC_GOT_TLSGD16_HI:
7461 case R_PPC_GOT_TLSGD16_HA:
7462 tls_gd = TLS_TPRELGD;
7463 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7464 goto tls_gdld_hi;
7465 break;
7466
7467 case R_PPC_GOT_TLSLD16_HI:
7468 case R_PPC_GOT_TLSLD16_HA:
7469 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7470 {
7471 tls_gdld_hi:
7472 if ((tls_mask & tls_gd) != 0)
7473 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7474 + R_PPC_GOT_TPREL16);
7475 else
7476 {
7477 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7478 rel->r_offset -= d_offset;
7479 r_type = R_PPC_NONE;
7480 }
7481 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7482 }
7483 break;
7484
7485 case R_PPC_GOT_TLSGD16:
7486 case R_PPC_GOT_TLSGD16_LO:
7487 tls_gd = TLS_TPRELGD;
7488 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7489 goto tls_ldgd_opt;
7490 break;
7491
7492 case R_PPC_GOT_TLSLD16:
7493 case R_PPC_GOT_TLSLD16_LO:
7494 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7495 {
7496 unsigned int insn1, insn2;
7497 bfd_vma offset;
7498
7499 tls_ldgd_opt:
7500 offset = (bfd_vma) -1;
7501 /* If not using the newer R_PPC_TLSGD/LD to mark
7502 __tls_get_addr calls, we must trust that the call
7503 stays with its arg setup insns, ie. that the next
7504 reloc is the __tls_get_addr call associated with
7505 the current reloc. Edit both insns. */
7506 if (input_section->has_tls_get_addr_call
7507 && rel + 1 < relend
7508 && branch_reloc_hash_match (input_bfd, rel + 1,
7509 htab->tls_get_addr))
7510 offset = rel[1].r_offset;
7511 if ((tls_mask & tls_gd) != 0)
7512 {
7513 /* IE */
7514 insn1 = bfd_get_32 (output_bfd,
7515 contents + rel->r_offset - d_offset);
7516 insn1 &= (1 << 26) - 1;
7517 insn1 |= 32 << 26; /* lwz */
7518 if (offset != (bfd_vma) -1)
7519 {
7520 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7521 insn2 = 0x7c631214; /* add 3,3,2 */
7522 bfd_put_32 (output_bfd, insn2, contents + offset);
7523 }
7524 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7525 + R_PPC_GOT_TPREL16);
7526 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7527 }
7528 else
7529 {
7530 /* LE */
7531 insn1 = 0x3c620000; /* addis 3,2,0 */
7532 if (tls_gd == 0)
7533 {
7534 /* Was an LD reloc. */
7535 for (r_symndx = 0;
7536 r_symndx < symtab_hdr->sh_info;
7537 r_symndx++)
7538 if (local_sections[r_symndx] == sec)
7539 break;
7540 if (r_symndx >= symtab_hdr->sh_info)
7541 r_symndx = STN_UNDEF;
7542 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7543 if (r_symndx != STN_UNDEF)
7544 rel->r_addend -= (local_syms[r_symndx].st_value
7545 + sec->output_offset
7546 + sec->output_section->vma);
7547 }
7548 r_type = R_PPC_TPREL16_HA;
7549 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7550 if (offset != (bfd_vma) -1)
7551 {
7552 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7553 rel[1].r_offset = offset + d_offset;
7554 rel[1].r_addend = rel->r_addend;
7555 insn2 = 0x38630000; /* addi 3,3,0 */
7556 bfd_put_32 (output_bfd, insn2, contents + offset);
7557 }
7558 }
7559 bfd_put_32 (output_bfd, insn1,
7560 contents + rel->r_offset - d_offset);
7561 if (tls_gd == 0)
7562 {
7563 /* We changed the symbol on an LD reloc. Start over
7564 in order to get h, sym, sec etc. right. */
7565 rel--;
7566 continue;
7567 }
7568 }
7569 break;
7570
7571 case R_PPC_TLSGD:
7572 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7573 {
7574 unsigned int insn2;
7575 bfd_vma offset = rel->r_offset;
7576
7577 if ((tls_mask & TLS_TPRELGD) != 0)
7578 {
7579 /* IE */
7580 r_type = R_PPC_NONE;
7581 insn2 = 0x7c631214; /* add 3,3,2 */
7582 }
7583 else
7584 {
7585 /* LE */
7586 r_type = R_PPC_TPREL16_LO;
7587 rel->r_offset += d_offset;
7588 insn2 = 0x38630000; /* addi 3,3,0 */
7589 }
7590 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7591 bfd_put_32 (output_bfd, insn2, contents + offset);
7592 /* Zap the reloc on the _tls_get_addr call too. */
7593 BFD_ASSERT (offset == rel[1].r_offset);
7594 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7595 }
7596 break;
7597
7598 case R_PPC_TLSLD:
7599 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7600 {
7601 unsigned int insn2;
7602
7603 for (r_symndx = 0;
7604 r_symndx < symtab_hdr->sh_info;
7605 r_symndx++)
7606 if (local_sections[r_symndx] == sec)
7607 break;
7608 if (r_symndx >= symtab_hdr->sh_info)
7609 r_symndx = STN_UNDEF;
7610 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7611 if (r_symndx != STN_UNDEF)
7612 rel->r_addend -= (local_syms[r_symndx].st_value
7613 + sec->output_offset
7614 + sec->output_section->vma);
7615
7616 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7617 rel->r_offset += d_offset;
7618 insn2 = 0x38630000; /* addi 3,3,0 */
7619 bfd_put_32 (output_bfd, insn2,
7620 contents + rel->r_offset - d_offset);
7621 /* Zap the reloc on the _tls_get_addr call too. */
7622 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7623 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7624 rel--;
7625 continue;
7626 }
7627 break;
7628 }
7629
7630 /* Handle other relocations that tweak non-addend part of insn. */
7631 branch_bit = 0;
7632 switch (r_type)
7633 {
7634 default:
7635 break;
7636
7637 /* Branch taken prediction relocations. */
7638 case R_PPC_ADDR14_BRTAKEN:
7639 case R_PPC_REL14_BRTAKEN:
7640 branch_bit = BRANCH_PREDICT_BIT;
7641 /* Fall thru */
7642
7643 /* Branch not taken prediction relocations. */
7644 case R_PPC_ADDR14_BRNTAKEN:
7645 case R_PPC_REL14_BRNTAKEN:
7646 {
7647 bfd_vma insn;
7648
7649 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7650 insn &= ~BRANCH_PREDICT_BIT;
7651 insn |= branch_bit;
7652
7653 from = (rel->r_offset
7654 + input_section->output_offset
7655 + input_section->output_section->vma);
7656
7657 /* Invert 'y' bit if not the default. */
7658 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7659 insn ^= BRANCH_PREDICT_BIT;
7660
7661 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7662 break;
7663 }
7664 }
7665
7666 ifunc = NULL;
7667 if (!htab->is_vxworks)
7668 {
7669 struct plt_entry *ent;
7670
7671 if (h != NULL)
7672 {
7673 if (h->type == STT_GNU_IFUNC)
7674 ifunc = &h->plt.plist;
7675 }
7676 else if (local_got_offsets != NULL
7677 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7678 {
7679 struct plt_entry **local_plt;
7680
7681 local_plt = (struct plt_entry **) (local_got_offsets
7682 + symtab_hdr->sh_info);
7683 ifunc = local_plt + r_symndx;
7684 }
7685
7686 ent = NULL;
7687 if (ifunc != NULL
7688 && (!info->shared
7689 || is_branch_reloc (r_type)))
7690 {
7691 addend = 0;
7692 if (r_type == R_PPC_PLTREL24 && info->shared)
7693 addend = rel->r_addend;
7694 ent = find_plt_ent (ifunc, got2, addend);
7695 }
7696 if (ent != NULL)
7697 {
7698 if (h == NULL && (ent->plt.offset & 1) == 0)
7699 {
7700 Elf_Internal_Rela rela;
7701 bfd_byte *loc;
7702
7703 rela.r_offset = (htab->iplt->output_section->vma
7704 + htab->iplt->output_offset
7705 + ent->plt.offset);
7706 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7707 rela.r_addend = relocation;
7708 loc = htab->reliplt->contents;
7709 loc += (htab->reliplt->reloc_count++
7710 * sizeof (Elf32_External_Rela));
7711 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7712
7713 ent->plt.offset |= 1;
7714 }
7715 if (h == NULL && (ent->glink_offset & 1) == 0)
7716 {
7717 unsigned char *p = ((unsigned char *) htab->glink->contents
7718 + ent->glink_offset);
7719 write_glink_stub (ent, htab->iplt, p, info);
7720 ent->glink_offset |= 1;
7721 }
7722
7723 unresolved_reloc = FALSE;
7724 if (htab->plt_type == PLT_NEW
7725 || !htab->elf.dynamic_sections_created
7726 || h == NULL)
7727 relocation = (htab->glink->output_section->vma
7728 + htab->glink->output_offset
7729 + (ent->glink_offset & ~1));
7730 else
7731 relocation = (htab->plt->output_section->vma
7732 + htab->plt->output_offset
7733 + ent->plt.offset);
7734 }
7735 }
7736
7737 addend = rel->r_addend;
7738 tls_type = 0;
7739 howto = NULL;
7740 if (r_type < R_PPC_max)
7741 howto = ppc_elf_howto_table[r_type];
7742 switch (r_type)
7743 {
7744 default:
7745 info->callbacks->einfo
7746 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
7747 input_bfd, (int) r_type, sym_name);
7748
7749 bfd_set_error (bfd_error_bad_value);
7750 ret = FALSE;
7751 continue;
7752
7753 case R_PPC_NONE:
7754 case R_PPC_TLS:
7755 case R_PPC_TLSGD:
7756 case R_PPC_TLSLD:
7757 case R_PPC_EMB_MRKREF:
7758 case R_PPC_GNU_VTINHERIT:
7759 case R_PPC_GNU_VTENTRY:
7760 continue;
7761
7762 /* GOT16 relocations. Like an ADDR16 using the symbol's
7763 address in the GOT as relocation value instead of the
7764 symbol's value itself. Also, create a GOT entry for the
7765 symbol and put the symbol value there. */
7766 case R_PPC_GOT_TLSGD16:
7767 case R_PPC_GOT_TLSGD16_LO:
7768 case R_PPC_GOT_TLSGD16_HI:
7769 case R_PPC_GOT_TLSGD16_HA:
7770 tls_type = TLS_TLS | TLS_GD;
7771 goto dogot;
7772
7773 case R_PPC_GOT_TLSLD16:
7774 case R_PPC_GOT_TLSLD16_LO:
7775 case R_PPC_GOT_TLSLD16_HI:
7776 case R_PPC_GOT_TLSLD16_HA:
7777 tls_type = TLS_TLS | TLS_LD;
7778 goto dogot;
7779
7780 case R_PPC_GOT_TPREL16:
7781 case R_PPC_GOT_TPREL16_LO:
7782 case R_PPC_GOT_TPREL16_HI:
7783 case R_PPC_GOT_TPREL16_HA:
7784 tls_type = TLS_TLS | TLS_TPREL;
7785 goto dogot;
7786
7787 case R_PPC_GOT_DTPREL16:
7788 case R_PPC_GOT_DTPREL16_LO:
7789 case R_PPC_GOT_DTPREL16_HI:
7790 case R_PPC_GOT_DTPREL16_HA:
7791 tls_type = TLS_TLS | TLS_DTPREL;
7792 goto dogot;
7793
7794 case R_PPC_GOT16:
7795 case R_PPC_GOT16_LO:
7796 case R_PPC_GOT16_HI:
7797 case R_PPC_GOT16_HA:
7798 tls_mask = 0;
7799 dogot:
7800 {
7801 /* Relocation is to the entry for this symbol in the global
7802 offset table. */
7803 bfd_vma off;
7804 bfd_vma *offp;
7805 unsigned long indx;
7806
7807 if (htab->got == NULL)
7808 abort ();
7809
7810 indx = 0;
7811 if (tls_type == (TLS_TLS | TLS_LD)
7812 && (h == NULL
7813 || !h->def_dynamic))
7814 offp = &htab->tlsld_got.offset;
7815 else if (h != NULL)
7816 {
7817 bfd_boolean dyn;
7818 dyn = htab->elf.dynamic_sections_created;
7819 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7820 || (info->shared
7821 && SYMBOL_REFERENCES_LOCAL (info, h)))
7822 /* This is actually a static link, or it is a
7823 -Bsymbolic link and the symbol is defined
7824 locally, or the symbol was forced to be local
7825 because of a version file. */
7826 ;
7827 else
7828 {
7829 indx = h->dynindx;
7830 unresolved_reloc = FALSE;
7831 }
7832 offp = &h->got.offset;
7833 }
7834 else
7835 {
7836 if (local_got_offsets == NULL)
7837 abort ();
7838 offp = &local_got_offsets[r_symndx];
7839 }
7840
7841 /* The offset must always be a multiple of 4. We use the
7842 least significant bit to record whether we have already
7843 processed this entry. */
7844 off = *offp;
7845 if ((off & 1) != 0)
7846 off &= ~1;
7847 else
7848 {
7849 unsigned int tls_m = (tls_mask
7850 & (TLS_LD | TLS_GD | TLS_DTPREL
7851 | TLS_TPREL | TLS_TPRELGD));
7852
7853 if (offp == &htab->tlsld_got.offset)
7854 tls_m = TLS_LD;
7855 else if (h == NULL
7856 || !h->def_dynamic)
7857 tls_m &= ~TLS_LD;
7858
7859 /* We might have multiple got entries for this sym.
7860 Initialize them all. */
7861 do
7862 {
7863 int tls_ty = 0;
7864
7865 if ((tls_m & TLS_LD) != 0)
7866 {
7867 tls_ty = TLS_TLS | TLS_LD;
7868 tls_m &= ~TLS_LD;
7869 }
7870 else if ((tls_m & TLS_GD) != 0)
7871 {
7872 tls_ty = TLS_TLS | TLS_GD;
7873 tls_m &= ~TLS_GD;
7874 }
7875 else if ((tls_m & TLS_DTPREL) != 0)
7876 {
7877 tls_ty = TLS_TLS | TLS_DTPREL;
7878 tls_m &= ~TLS_DTPREL;
7879 }
7880 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
7881 {
7882 tls_ty = TLS_TLS | TLS_TPREL;
7883 tls_m = 0;
7884 }
7885
7886 /* Generate relocs for the dynamic linker. */
7887 if ((info->shared || indx != 0)
7888 && (offp == &htab->tlsld_got.offset
7889 || h == NULL
7890 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7891 || h->root.type != bfd_link_hash_undefweak))
7892 {
7893 asection *rsec = htab->relgot;
7894 bfd_byte * loc;
7895
7896 outrel.r_offset = (htab->got->output_section->vma
7897 + htab->got->output_offset
7898 + off);
7899 outrel.r_addend = 0;
7900 if (tls_ty & (TLS_LD | TLS_GD))
7901 {
7902 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
7903 if (tls_ty == (TLS_TLS | TLS_GD))
7904 {
7905 loc = rsec->contents;
7906 loc += (rsec->reloc_count++
7907 * sizeof (Elf32_External_Rela));
7908 bfd_elf32_swap_reloca_out (output_bfd,
7909 &outrel, loc);
7910 outrel.r_offset += 4;
7911 outrel.r_info
7912 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7913 }
7914 }
7915 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
7916 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
7917 else if (tls_ty == (TLS_TLS | TLS_TPREL))
7918 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
7919 else if (indx != 0)
7920 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
7921 else if (ifunc != NULL)
7922 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7923 else
7924 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
7925 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
7926 {
7927 outrel.r_addend += relocation;
7928 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
7929 outrel.r_addend -= htab->elf.tls_sec->vma;
7930 }
7931 loc = rsec->contents;
7932 loc += (rsec->reloc_count++
7933 * sizeof (Elf32_External_Rela));
7934 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
7935 }
7936
7937 /* Init the .got section contents if we're not
7938 emitting a reloc. */
7939 else
7940 {
7941 bfd_vma value = relocation;
7942
7943 if (tls_ty == (TLS_TLS | TLS_LD))
7944 value = 1;
7945 else if (tls_ty != 0)
7946 {
7947 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
7948 if (tls_ty == (TLS_TLS | TLS_TPREL))
7949 value += DTP_OFFSET - TP_OFFSET;
7950
7951 if (tls_ty == (TLS_TLS | TLS_GD))
7952 {
7953 bfd_put_32 (output_bfd, value,
7954 htab->got->contents + off + 4);
7955 value = 1;
7956 }
7957 }
7958 bfd_put_32 (output_bfd, value,
7959 htab->got->contents + off);
7960 }
7961
7962 off += 4;
7963 if (tls_ty & (TLS_LD | TLS_GD))
7964 off += 4;
7965 }
7966 while (tls_m != 0);
7967
7968 off = *offp;
7969 *offp = off | 1;
7970 }
7971
7972 if (off >= (bfd_vma) -2)
7973 abort ();
7974
7975 if ((tls_type & TLS_TLS) != 0)
7976 {
7977 if (tls_type != (TLS_TLS | TLS_LD))
7978 {
7979 if ((tls_mask & TLS_LD) != 0
7980 && !(h == NULL
7981 || !h->def_dynamic))
7982 off += 8;
7983 if (tls_type != (TLS_TLS | TLS_GD))
7984 {
7985 if ((tls_mask & TLS_GD) != 0)
7986 off += 8;
7987 if (tls_type != (TLS_TLS | TLS_DTPREL))
7988 {
7989 if ((tls_mask & TLS_DTPREL) != 0)
7990 off += 4;
7991 }
7992 }
7993 }
7994 }
7995
7996 relocation = (htab->got->output_section->vma
7997 + htab->got->output_offset
7998 + off
7999 - SYM_VAL (htab->elf.hgot));
8000
8001 /* Addends on got relocations don't make much sense.
8002 x+off@got is actually x@got+off, and since the got is
8003 generated by a hash table traversal, the value in the
8004 got at entry m+n bears little relation to the entry m. */
8005 if (addend != 0)
8006 info->callbacks->einfo
8007 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8008 input_bfd, input_section, rel->r_offset,
8009 howto->name,
8010 sym_name);
8011 }
8012 break;
8013
8014 /* Relocations that need no special processing. */
8015 case R_PPC_LOCAL24PC:
8016 /* It makes no sense to point a local relocation
8017 at a symbol not in this object. */
8018 if (unresolved_reloc)
8019 {
8020 if (! (*info->callbacks->undefined_symbol) (info,
8021 h->root.root.string,
8022 input_bfd,
8023 input_section,
8024 rel->r_offset,
8025 TRUE))
8026 return FALSE;
8027 continue;
8028 }
8029 break;
8030
8031 case R_PPC_DTPREL16:
8032 case R_PPC_DTPREL16_LO:
8033 case R_PPC_DTPREL16_HI:
8034 case R_PPC_DTPREL16_HA:
8035 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8036 break;
8037
8038 /* Relocations that may need to be propagated if this is a shared
8039 object. */
8040 case R_PPC_TPREL16:
8041 case R_PPC_TPREL16_LO:
8042 case R_PPC_TPREL16_HI:
8043 case R_PPC_TPREL16_HA:
8044 if (h != NULL
8045 && h->root.type == bfd_link_hash_undefweak
8046 && h->dynindx == -1)
8047 {
8048 /* Make this relocation against an undefined weak symbol
8049 resolve to zero. This is really just a tweak, since
8050 code using weak externs ought to check that they are
8051 defined before using them. */
8052 bfd_byte *p = contents + rel->r_offset - d_offset;
8053 unsigned int insn = bfd_get_32 (output_bfd, p);
8054 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8055 if (insn != 0)
8056 bfd_put_32 (output_bfd, insn, p);
8057 break;
8058 }
8059 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8060 /* The TPREL16 relocs shouldn't really be used in shared
8061 libs as they will result in DT_TEXTREL being set, but
8062 support them anyway. */
8063 goto dodyn;
8064
8065 case R_PPC_TPREL32:
8066 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8067 goto dodyn;
8068
8069 case R_PPC_DTPREL32:
8070 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8071 goto dodyn;
8072
8073 case R_PPC_DTPMOD32:
8074 relocation = 1;
8075 addend = 0;
8076 goto dodyn;
8077
8078 case R_PPC_REL16:
8079 case R_PPC_REL16_LO:
8080 case R_PPC_REL16_HI:
8081 case R_PPC_REL16_HA:
8082 break;
8083
8084 case R_PPC_REL32:
8085 if (h == NULL || h == htab->elf.hgot)
8086 break;
8087 /* fall through */
8088
8089 case R_PPC_ADDR32:
8090 case R_PPC_ADDR16:
8091 case R_PPC_ADDR16_LO:
8092 case R_PPC_ADDR16_HI:
8093 case R_PPC_ADDR16_HA:
8094 case R_PPC_UADDR32:
8095 case R_PPC_UADDR16:
8096 goto dodyn;
8097
8098 case R_PPC_VLE_REL8:
8099 case R_PPC_VLE_REL15:
8100 case R_PPC_VLE_REL24:
8101 case R_PPC_REL24:
8102 case R_PPC_REL14:
8103 case R_PPC_REL14_BRTAKEN:
8104 case R_PPC_REL14_BRNTAKEN:
8105 /* If these relocations are not to a named symbol, they can be
8106 handled right here, no need to bother the dynamic linker. */
8107 if (SYMBOL_CALLS_LOCAL (info, h)
8108 || h == htab->elf.hgot)
8109 break;
8110 /* fall through */
8111
8112 case R_PPC_ADDR24:
8113 case R_PPC_ADDR14:
8114 case R_PPC_ADDR14_BRTAKEN:
8115 case R_PPC_ADDR14_BRNTAKEN:
8116 if (h != NULL && !info->shared)
8117 break;
8118 /* fall through */
8119
8120 dodyn:
8121 if ((input_section->flags & SEC_ALLOC) == 0
8122 || is_vxworks_tls)
8123 break;
8124
8125 if ((info->shared
8126 && !(h != NULL
8127 && ((h->root.type == bfd_link_hash_undefined
8128 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8129 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8130 || (h->root.type == bfd_link_hash_undefweak
8131 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8132 && (must_be_dyn_reloc (info, r_type)
8133 || !SYMBOL_CALLS_LOCAL (info, h)))
8134 || (ELIMINATE_COPY_RELOCS
8135 && !info->shared
8136 && h != NULL
8137 && h->dynindx != -1
8138 && !h->non_got_ref
8139 && !h->def_regular))
8140 {
8141 int skip;
8142 bfd_byte * loc;
8143 #ifdef DEBUG
8144 fprintf (stderr, "ppc_elf_relocate_section needs to "
8145 "create relocation for %s\n",
8146 (h && h->root.root.string
8147 ? h->root.root.string : "<unknown>"));
8148 #endif
8149
8150 /* When generating a shared object, these relocations
8151 are copied into the output file to be resolved at run
8152 time. */
8153 if (sreloc == NULL)
8154 {
8155 sreloc = elf_section_data (input_section)->sreloc;
8156 if (!htab->elf.dynamic_sections_created)
8157 sreloc = htab->reliplt;
8158 if (sreloc == NULL)
8159 return FALSE;
8160 }
8161
8162 skip = 0;
8163 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8164 input_section,
8165 rel->r_offset);
8166 if (outrel.r_offset == (bfd_vma) -1
8167 || outrel.r_offset == (bfd_vma) -2)
8168 skip = (int) outrel.r_offset;
8169 outrel.r_offset += (input_section->output_section->vma
8170 + input_section->output_offset);
8171
8172 if (skip)
8173 memset (&outrel, 0, sizeof outrel);
8174 else if ((h != NULL
8175 && (h->root.type == bfd_link_hash_undefined
8176 || h->root.type == bfd_link_hash_undefweak))
8177 || !SYMBOL_REFERENCES_LOCAL (info, h))
8178 {
8179 unresolved_reloc = FALSE;
8180 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8181 outrel.r_addend = rel->r_addend;
8182 }
8183 else
8184 {
8185 outrel.r_addend = relocation + rel->r_addend;
8186
8187 if (r_type != R_PPC_ADDR32)
8188 {
8189 long indx = 0;
8190
8191 if (ifunc != NULL)
8192 {
8193 /* If we get here when building a static
8194 executable, then the libc startup function
8195 responsible for applying indirect function
8196 relocations is going to complain about
8197 the reloc type.
8198 If we get here when building a dynamic
8199 executable, it will be because we have
8200 a text relocation. The dynamic loader
8201 will set the text segment writable and
8202 non-executable to apply text relocations.
8203 So we'll segfault when trying to run the
8204 indirection function to resolve the reloc. */
8205 info->callbacks->einfo
8206 (_("%P: %H: relocation %s for indirect "
8207 "function %s unsupported\n"),
8208 input_bfd, input_section, rel->r_offset,
8209 howto->name,
8210 sym_name);
8211 ret = FALSE;
8212 }
8213 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8214 ;
8215 else if (sec == NULL || sec->owner == NULL)
8216 {
8217 bfd_set_error (bfd_error_bad_value);
8218 ret = FALSE;
8219 }
8220 else
8221 {
8222 asection *osec;
8223
8224 /* We are turning this relocation into one
8225 against a section symbol. It would be
8226 proper to subtract the symbol's value,
8227 osec->vma, from the emitted reloc addend,
8228 but ld.so expects buggy relocs.
8229 FIXME: Why not always use a zero index? */
8230 osec = sec->output_section;
8231 indx = elf_section_data (osec)->dynindx;
8232 if (indx == 0)
8233 {
8234 osec = htab->elf.text_index_section;
8235 indx = elf_section_data (osec)->dynindx;
8236 }
8237 BFD_ASSERT (indx != 0);
8238 #ifdef DEBUG
8239 if (indx == 0)
8240 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8241 indx, osec->name, osec->flags,
8242 h->root.root.string);
8243 #endif
8244 }
8245
8246 outrel.r_info = ELF32_R_INFO (indx, r_type);
8247 }
8248 else if (ifunc != NULL)
8249 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8250 else
8251 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8252 }
8253
8254 loc = sreloc->contents;
8255 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8256 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8257
8258 if (skip == -1)
8259 continue;
8260
8261 /* This reloc will be computed at runtime. We clear the memory
8262 so that it contains predictable value. */
8263 if (! skip
8264 && ((input_section->flags & SEC_ALLOC) != 0
8265 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8266 {
8267 relocation = howto->pc_relative ? outrel.r_offset : 0;
8268 addend = 0;
8269 break;
8270 }
8271 }
8272 break;
8273
8274 case R_PPC_RELAX_PLT:
8275 case R_PPC_RELAX_PLTREL24:
8276 if (h != NULL)
8277 {
8278 struct plt_entry *ent;
8279 bfd_vma got2_addend = 0;
8280
8281 if (r_type == R_PPC_RELAX_PLTREL24)
8282 {
8283 if (info->shared)
8284 got2_addend = addend;
8285 addend = 0;
8286 }
8287 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8288 if (htab->plt_type == PLT_NEW)
8289 relocation = (htab->glink->output_section->vma
8290 + htab->glink->output_offset
8291 + ent->glink_offset);
8292 else
8293 relocation = (htab->plt->output_section->vma
8294 + htab->plt->output_offset
8295 + ent->plt.offset);
8296 }
8297 /* Fall thru */
8298
8299 case R_PPC_RELAX:
8300 if (info->shared)
8301 relocation -= (input_section->output_section->vma
8302 + input_section->output_offset
8303 + rel->r_offset - 4);
8304
8305 {
8306 unsigned long t0;
8307 unsigned long t1;
8308
8309 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
8310 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
8311
8312 /* We're clearing the bits for R_PPC_ADDR16_HA
8313 and R_PPC_ADDR16_LO here. */
8314 t0 &= ~0xffff;
8315 t1 &= ~0xffff;
8316
8317 /* t0 is HA, t1 is LO */
8318 relocation += addend;
8319 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
8320 t1 |= relocation & 0xffff;
8321
8322 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
8323 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
8324
8325 /* Rewrite the reloc and convert one of the trailing nop
8326 relocs to describe this relocation. */
8327 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8328 /* The relocs are at the bottom 2 bytes */
8329 rel[0].r_offset += 2;
8330 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8331 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8332 rel[1].r_offset += 4;
8333 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8334 rel++;
8335 }
8336 continue;
8337
8338 /* Indirect .sdata relocation. */
8339 case R_PPC_EMB_SDAI16:
8340 BFD_ASSERT (htab->sdata[0].section != NULL);
8341 if (!is_static_defined (htab->sdata[0].sym))
8342 {
8343 unresolved_reloc = TRUE;
8344 break;
8345 }
8346 relocation
8347 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8348 h, relocation, rel);
8349 addend = 0;
8350 break;
8351
8352 /* Indirect .sdata2 relocation. */
8353 case R_PPC_EMB_SDA2I16:
8354 BFD_ASSERT (htab->sdata[1].section != NULL);
8355 if (!is_static_defined (htab->sdata[1].sym))
8356 {
8357 unresolved_reloc = TRUE;
8358 break;
8359 }
8360 relocation
8361 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8362 h, relocation, rel);
8363 addend = 0;
8364 break;
8365
8366 /* Handle the TOC16 reloc. We want to use the offset within the .got
8367 section, not the actual VMA. This is appropriate when generating
8368 an embedded ELF object, for which the .got section acts like the
8369 AIX .toc section. */
8370 case R_PPC_TOC16: /* phony GOT16 relocations */
8371 if (sec == NULL || sec->output_section == NULL)
8372 {
8373 unresolved_reloc = TRUE;
8374 break;
8375 }
8376 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8377 ".got") == 0
8378 || strcmp (bfd_get_section_name (sec->owner, sec),
8379 ".cgot") == 0);
8380
8381 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8382 break;
8383
8384 case R_PPC_PLTREL24:
8385 if (h == NULL || ifunc != NULL)
8386 break;
8387 /* Relocation is to the entry for this symbol in the
8388 procedure linkage table. */
8389 {
8390 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8391 info->shared ? addend : 0);
8392 addend = 0;
8393 if (ent == NULL
8394 || htab->plt == NULL)
8395 {
8396 /* We didn't make a PLT entry for this symbol. This
8397 happens when statically linking PIC code, or when
8398 using -Bsymbolic. */
8399 break;
8400 }
8401
8402 unresolved_reloc = FALSE;
8403 if (htab->plt_type == PLT_NEW)
8404 relocation = (htab->glink->output_section->vma
8405 + htab->glink->output_offset
8406 + ent->glink_offset);
8407 else
8408 relocation = (htab->plt->output_section->vma
8409 + htab->plt->output_offset
8410 + ent->plt.offset);
8411 }
8412 break;
8413
8414 /* Relocate against _SDA_BASE_. */
8415 case R_PPC_SDAREL16:
8416 {
8417 const char *name;
8418 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8419
8420 if (sec == NULL
8421 || sec->output_section == NULL
8422 || !is_static_defined (sda))
8423 {
8424 unresolved_reloc = TRUE;
8425 break;
8426 }
8427 addend -= SYM_VAL (sda);
8428
8429 name = bfd_get_section_name (output_bfd, sec->output_section);
8430 if (! ((CONST_STRNEQ (name, ".sdata")
8431 && (name[6] == 0 || name[6] == '.'))
8432 || (CONST_STRNEQ (name, ".sbss")
8433 && (name[5] == 0 || name[5] == '.'))))
8434 {
8435 info->callbacks->einfo
8436 (_("%P: %B: the target (%s) of a %s relocation is "
8437 "in the wrong output section (%s)\n"),
8438 input_bfd,
8439 sym_name,
8440 howto->name,
8441 name);
8442 }
8443 }
8444 break;
8445
8446 /* Relocate against _SDA2_BASE_. */
8447 case R_PPC_EMB_SDA2REL:
8448 {
8449 const char *name;
8450 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8451
8452 if (sec == NULL
8453 || sec->output_section == NULL
8454 || !is_static_defined (sda))
8455 {
8456 unresolved_reloc = TRUE;
8457 break;
8458 }
8459 addend -= SYM_VAL (sda);
8460
8461 name = bfd_get_section_name (output_bfd, sec->output_section);
8462 if (! (CONST_STRNEQ (name, ".sdata2")
8463 || CONST_STRNEQ (name, ".sbss2")))
8464 {
8465 info->callbacks->einfo
8466 (_("%P: %B: the target (%s) of a %s relocation is "
8467 "in the wrong output section (%s)\n"),
8468 input_bfd,
8469 sym_name,
8470 howto->name,
8471 name);
8472 }
8473 }
8474 break;
8475
8476 case R_PPC_VLE_LO16A:
8477 relocation = (relocation + addend) & 0xffff;
8478 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8479 relocation, split16a_type);
8480 continue;
8481
8482 case R_PPC_VLE_LO16D:
8483 relocation = (relocation + addend) & 0xffff;
8484 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8485 relocation, split16d_type);
8486 continue;
8487
8488 case R_PPC_VLE_HI16A:
8489 relocation = ((relocation + addend) >> 16) & 0xffff;
8490 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8491 relocation, split16a_type);
8492 continue;
8493
8494 case R_PPC_VLE_HI16D:
8495 relocation = ((relocation + addend) >> 16) & 0xffff;
8496 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8497 relocation, split16d_type);
8498 continue;
8499
8500 case R_PPC_VLE_HA16A:
8501 {
8502 bfd_vma value = relocation + addend;
8503 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8504 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8505 value, split16a_type);
8506 }
8507 continue;
8508
8509 case R_PPC_VLE_HA16D:
8510 {
8511 bfd_vma value = relocation + addend;
8512 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8513 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8514 value, split16d_type);
8515 }
8516 continue;
8517
8518 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8519 case R_PPC_EMB_SDA21:
8520 case R_PPC_VLE_SDA21:
8521 case R_PPC_EMB_RELSDA:
8522 case R_PPC_VLE_SDA21_LO:
8523 {
8524 const char *name;
8525 int reg;
8526 struct elf_link_hash_entry *sda = NULL;
8527
8528 if (sec == NULL || sec->output_section == NULL)
8529 {
8530 unresolved_reloc = TRUE;
8531 break;
8532 }
8533
8534 name = bfd_get_section_name (output_bfd, sec->output_section);
8535 if (((CONST_STRNEQ (name, ".sdata")
8536 && (name[6] == 0 || name[6] == '.'))
8537 || (CONST_STRNEQ (name, ".sbss")
8538 && (name[5] == 0 || name[5] == '.'))))
8539 {
8540 reg = 13;
8541 sda = htab->sdata[0].sym;
8542 }
8543 else if (CONST_STRNEQ (name, ".sdata2")
8544 || CONST_STRNEQ (name, ".sbss2"))
8545 {
8546 reg = 2;
8547 sda = htab->sdata[1].sym;
8548 }
8549 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8550 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8551 {
8552 reg = 0;
8553 }
8554 else
8555 {
8556 info->callbacks->einfo
8557 (_("%P: %B: the target (%s) of a %s relocation is "
8558 "in the wrong output section (%s)\n"),
8559 input_bfd,
8560 sym_name,
8561 howto->name,
8562 name);
8563
8564 bfd_set_error (bfd_error_bad_value);
8565 ret = FALSE;
8566 continue;
8567 }
8568
8569 if (sda != NULL)
8570 {
8571 if (!is_static_defined (sda))
8572 {
8573 unresolved_reloc = TRUE;
8574 break;
8575 }
8576 addend -= SYM_VAL (sda);
8577 }
8578
8579 if (reg == 0
8580 && (r_type == R_PPC_VLE_SDA21
8581 || r_type == R_PPC_VLE_SDA21_LO))
8582 {
8583 /* Use the split20 format. */
8584 bfd_vma insn, bits12to15, bits21to31;
8585 bfd_vma value = (relocation + rel->r_offset) & 0xffff;
8586 /* Propagate sign bit, if necessary. */
8587 insn = (value & 0x8000) ? 0x70107800 : 0x70000000;
8588 bits12to15 = value & 0x700;
8589 bits21to31 = value & 0x7ff;
8590 insn |= bits12to15;
8591 insn |= bits21to31;
8592 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8593 continue;
8594 }
8595 else if (r_type == R_PPC_EMB_SDA21
8596 || r_type == R_PPC_VLE_SDA21
8597 || r_type == R_PPC_VLE_SDA21_LO)
8598 {
8599 bfd_vma insn; /* Fill in register field. */
8600
8601 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8602 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8603 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8604 }
8605 }
8606 break;
8607
8608 case R_PPC_VLE_SDAREL_LO16A:
8609 case R_PPC_VLE_SDAREL_LO16D:
8610 case R_PPC_VLE_SDAREL_HI16A:
8611 case R_PPC_VLE_SDAREL_HI16D:
8612 case R_PPC_VLE_SDAREL_HA16A:
8613 case R_PPC_VLE_SDAREL_HA16D:
8614 {
8615 bfd_vma value;
8616 const char *name;
8617 //int reg;
8618 struct elf_link_hash_entry *sda = NULL;
8619
8620 if (sec == NULL || sec->output_section == NULL)
8621 {
8622 unresolved_reloc = TRUE;
8623 break;
8624 }
8625
8626 name = bfd_get_section_name (output_bfd, sec->output_section);
8627 if (((CONST_STRNEQ (name, ".sdata")
8628 && (name[6] == 0 || name[6] == '.'))
8629 || (CONST_STRNEQ (name, ".sbss")
8630 && (name[5] == 0 || name[5] == '.'))))
8631 {
8632 //reg = 13;
8633 sda = htab->sdata[0].sym;
8634 }
8635 else if (CONST_STRNEQ (name, ".sdata2")
8636 || CONST_STRNEQ (name, ".sbss2"))
8637 {
8638 //reg = 2;
8639 sda = htab->sdata[1].sym;
8640 }
8641 else
8642 {
8643 (*_bfd_error_handler)
8644 (_("%B: the target (%s) of a %s relocation is "
8645 "in the wrong output section (%s)"),
8646 input_bfd,
8647 sym_name,
8648 howto->name,
8649 name);
8650
8651 bfd_set_error (bfd_error_bad_value);
8652 ret = FALSE;
8653 continue;
8654 }
8655
8656 if (sda != NULL)
8657 {
8658 if (!is_static_defined (sda))
8659 {
8660 unresolved_reloc = TRUE;
8661 break;
8662 }
8663 }
8664
8665 value = sda->root.u.def.section->output_section->vma
8666 + sda->root.u.def.section->output_offset;
8667
8668 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8669 {
8670 value = (value + addend) & 0xffff;
8671 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8672 value, split16a_type);
8673 }
8674 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8675 {
8676 value = (value + addend) & 0xffff;
8677 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8678 value, split16d_type);
8679 }
8680 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8681 {
8682 value = ((value + addend) >> 16) & 0xffff;
8683 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8684 value, split16a_type);
8685 }
8686 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8687 {
8688 value = ((value + addend) >> 16) & 0xffff;
8689 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8690 value, split16d_type);
8691 }
8692 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8693 {
8694 value += addend;
8695 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8696 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8697 value, split16a_type);
8698 }
8699 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8700 {
8701 value += addend;
8702 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8703 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8704 value, split16d_type);
8705 }
8706 }
8707 continue;
8708
8709 /* Relocate against the beginning of the section. */
8710 case R_PPC_SECTOFF:
8711 case R_PPC_SECTOFF_LO:
8712 case R_PPC_SECTOFF_HI:
8713 case R_PPC_SECTOFF_HA:
8714 if (sec == NULL || sec->output_section == NULL)
8715 {
8716 unresolved_reloc = TRUE;
8717 break;
8718 }
8719 addend -= sec->output_section->vma;
8720 break;
8721
8722 /* Negative relocations. */
8723 case R_PPC_EMB_NADDR32:
8724 case R_PPC_EMB_NADDR16:
8725 case R_PPC_EMB_NADDR16_LO:
8726 case R_PPC_EMB_NADDR16_HI:
8727 case R_PPC_EMB_NADDR16_HA:
8728 addend -= 2 * relocation;
8729 break;
8730
8731 case R_PPC_COPY:
8732 case R_PPC_GLOB_DAT:
8733 case R_PPC_JMP_SLOT:
8734 case R_PPC_RELATIVE:
8735 case R_PPC_IRELATIVE:
8736 case R_PPC_PLT32:
8737 case R_PPC_PLTREL32:
8738 case R_PPC_PLT16_LO:
8739 case R_PPC_PLT16_HI:
8740 case R_PPC_PLT16_HA:
8741 case R_PPC_ADDR30:
8742 case R_PPC_EMB_RELSEC16:
8743 case R_PPC_EMB_RELST_LO:
8744 case R_PPC_EMB_RELST_HI:
8745 case R_PPC_EMB_RELST_HA:
8746 case R_PPC_EMB_BIT_FLD:
8747 info->callbacks->einfo
8748 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
8749 input_bfd,
8750 howto->name,
8751 sym_name);
8752
8753 bfd_set_error (bfd_error_invalid_operation);
8754 ret = FALSE;
8755 continue;
8756 }
8757
8758 /* Do any further special processing. */
8759 switch (r_type)
8760 {
8761 default:
8762 break;
8763
8764 case R_PPC_ADDR16_HA:
8765 case R_PPC_REL16_HA:
8766 case R_PPC_SECTOFF_HA:
8767 case R_PPC_TPREL16_HA:
8768 case R_PPC_DTPREL16_HA:
8769 case R_PPC_EMB_NADDR16_HA:
8770 case R_PPC_EMB_RELST_HA:
8771 /* It's just possible that this symbol is a weak symbol
8772 that's not actually defined anywhere. In that case,
8773 'sec' would be NULL, and we should leave the symbol
8774 alone (it will be set to zero elsewhere in the link). */
8775 if (sec == NULL)
8776 break;
8777 /* Fall thru */
8778
8779 case R_PPC_PLT16_HA:
8780 case R_PPC_GOT16_HA:
8781 case R_PPC_GOT_TLSGD16_HA:
8782 case R_PPC_GOT_TLSLD16_HA:
8783 case R_PPC_GOT_TPREL16_HA:
8784 case R_PPC_GOT_DTPREL16_HA:
8785 /* Add 0x10000 if sign bit in 0:15 is set.
8786 Bits 0:15 are not used. */
8787 addend += 0x8000;
8788 break;
8789 }
8790
8791 #ifdef DEBUG
8792 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
8793 "offset = %ld, addend = %ld\n",
8794 howto->name,
8795 (int) r_type,
8796 sym_name,
8797 r_symndx,
8798 (long) rel->r_offset,
8799 (long) addend);
8800 #endif
8801
8802 if (unresolved_reloc
8803 && !((input_section->flags & SEC_DEBUGGING) != 0
8804 && h->def_dynamic)
8805 && _bfd_elf_section_offset (output_bfd, info, input_section,
8806 rel->r_offset) != (bfd_vma) -1)
8807 {
8808 info->callbacks->einfo
8809 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
8810 input_bfd, input_section, rel->r_offset,
8811 howto->name,
8812 sym_name);
8813 ret = FALSE;
8814 }
8815
8816 r = _bfd_final_link_relocate (howto,
8817 input_bfd,
8818 input_section,
8819 contents,
8820 rel->r_offset,
8821 relocation,
8822 addend);
8823
8824 if (r != bfd_reloc_ok)
8825 {
8826 if (r == bfd_reloc_overflow)
8827 {
8828 if (warned)
8829 continue;
8830 if (h != NULL
8831 && h->root.type == bfd_link_hash_undefweak
8832 && howto->pc_relative)
8833 {
8834 /* Assume this is a call protected by other code that
8835 detect the symbol is undefined. If this is the case,
8836 we can safely ignore the overflow. If not, the
8837 program is hosed anyway, and a little warning isn't
8838 going to help. */
8839
8840 continue;
8841 }
8842
8843 if (! (*info->callbacks->reloc_overflow) (info,
8844 (h ? &h->root : NULL),
8845 sym_name,
8846 howto->name,
8847 rel->r_addend,
8848 input_bfd,
8849 input_section,
8850 rel->r_offset))
8851 return FALSE;
8852 }
8853 else
8854 {
8855 info->callbacks->einfo
8856 (_("%P: %H: %s reloc against `%s': error %d\n"),
8857 input_bfd, input_section, rel->r_offset,
8858 howto->name, sym_name, (int) r);
8859 ret = FALSE;
8860 }
8861 }
8862 }
8863
8864 #ifdef DEBUG
8865 fprintf (stderr, "\n");
8866 #endif
8867
8868 return ret;
8869 }
8870 \f
8871 /* Finish up dynamic symbol handling. We set the contents of various
8872 dynamic sections here. */
8873
8874 static bfd_boolean
8875 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
8876 struct bfd_link_info *info,
8877 struct elf_link_hash_entry *h,
8878 Elf_Internal_Sym *sym)
8879 {
8880 struct ppc_elf_link_hash_table *htab;
8881 struct plt_entry *ent;
8882 bfd_boolean doneone;
8883
8884 #ifdef DEBUG
8885 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
8886 h->root.root.string);
8887 #endif
8888
8889 htab = ppc_elf_hash_table (info);
8890 BFD_ASSERT (htab->elf.dynobj != NULL);
8891
8892 doneone = FALSE;
8893 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
8894 if (ent->plt.offset != (bfd_vma) -1)
8895 {
8896 if (!doneone)
8897 {
8898 Elf_Internal_Rela rela;
8899 bfd_byte *loc;
8900 bfd_vma reloc_index;
8901
8902 if (htab->plt_type == PLT_NEW
8903 || !htab->elf.dynamic_sections_created
8904 || h->dynindx == -1)
8905 reloc_index = ent->plt.offset / 4;
8906 else
8907 {
8908 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
8909 / htab->plt_slot_size);
8910 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
8911 && htab->plt_type == PLT_OLD)
8912 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
8913 }
8914
8915 /* This symbol has an entry in the procedure linkage table.
8916 Set it up. */
8917 if (htab->plt_type == PLT_VXWORKS
8918 && htab->elf.dynamic_sections_created
8919 && h->dynindx != -1)
8920 {
8921 bfd_vma got_offset;
8922 const bfd_vma *plt_entry;
8923
8924 /* The first three entries in .got.plt are reserved. */
8925 got_offset = (reloc_index + 3) * 4;
8926
8927 /* Use the right PLT. */
8928 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
8929 : ppc_elf_vxworks_plt_entry;
8930
8931 /* Fill in the .plt on VxWorks. */
8932 if (info->shared)
8933 {
8934 bfd_put_32 (output_bfd,
8935 plt_entry[0] | PPC_HA (got_offset),
8936 htab->plt->contents + ent->plt.offset + 0);
8937 bfd_put_32 (output_bfd,
8938 plt_entry[1] | PPC_LO (got_offset),
8939 htab->plt->contents + ent->plt.offset + 4);
8940 }
8941 else
8942 {
8943 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
8944
8945 bfd_put_32 (output_bfd,
8946 plt_entry[0] | PPC_HA (got_loc),
8947 htab->plt->contents + ent->plt.offset + 0);
8948 bfd_put_32 (output_bfd,
8949 plt_entry[1] | PPC_LO (got_loc),
8950 htab->plt->contents + ent->plt.offset + 4);
8951 }
8952
8953 bfd_put_32 (output_bfd, plt_entry[2],
8954 htab->plt->contents + ent->plt.offset + 8);
8955 bfd_put_32 (output_bfd, plt_entry[3],
8956 htab->plt->contents + ent->plt.offset + 12);
8957
8958 /* This instruction is an immediate load. The value loaded is
8959 the byte offset of the R_PPC_JMP_SLOT relocation from the
8960 start of the .rela.plt section. The value is stored in the
8961 low-order 16 bits of the load instruction. */
8962 /* NOTE: It appears that this is now an index rather than a
8963 prescaled offset. */
8964 bfd_put_32 (output_bfd,
8965 plt_entry[4] | reloc_index,
8966 htab->plt->contents + ent->plt.offset + 16);
8967 /* This instruction is a PC-relative branch whose target is
8968 the start of the PLT section. The address of this branch
8969 instruction is 20 bytes beyond the start of this PLT entry.
8970 The address is encoded in bits 6-29, inclusive. The value
8971 stored is right-shifted by two bits, permitting a 26-bit
8972 offset. */
8973 bfd_put_32 (output_bfd,
8974 (plt_entry[5]
8975 | (-(ent->plt.offset + 20) & 0x03fffffc)),
8976 htab->plt->contents + ent->plt.offset + 20);
8977 bfd_put_32 (output_bfd, plt_entry[6],
8978 htab->plt->contents + ent->plt.offset + 24);
8979 bfd_put_32 (output_bfd, plt_entry[7],
8980 htab->plt->contents + ent->plt.offset + 28);
8981
8982 /* Fill in the GOT entry corresponding to this PLT slot with
8983 the address immediately after the "bctr" instruction
8984 in this PLT entry. */
8985 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
8986 + htab->plt->output_offset
8987 + ent->plt.offset + 16),
8988 htab->sgotplt->contents + got_offset);
8989
8990 if (!info->shared)
8991 {
8992 /* Fill in a couple of entries in .rela.plt.unloaded. */
8993 loc = htab->srelplt2->contents
8994 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
8995 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
8996 * sizeof (Elf32_External_Rela));
8997
8998 /* Provide the @ha relocation for the first instruction. */
8999 rela.r_offset = (htab->plt->output_section->vma
9000 + htab->plt->output_offset
9001 + ent->plt.offset + 2);
9002 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9003 R_PPC_ADDR16_HA);
9004 rela.r_addend = got_offset;
9005 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9006 loc += sizeof (Elf32_External_Rela);
9007
9008 /* Provide the @l relocation for the second instruction. */
9009 rela.r_offset = (htab->plt->output_section->vma
9010 + htab->plt->output_offset
9011 + ent->plt.offset + 6);
9012 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9013 R_PPC_ADDR16_LO);
9014 rela.r_addend = got_offset;
9015 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9016 loc += sizeof (Elf32_External_Rela);
9017
9018 /* Provide a relocation for the GOT entry corresponding to this
9019 PLT slot. Point it at the middle of the .plt entry. */
9020 rela.r_offset = (htab->sgotplt->output_section->vma
9021 + htab->sgotplt->output_offset
9022 + got_offset);
9023 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9024 R_PPC_ADDR32);
9025 rela.r_addend = ent->plt.offset + 16;
9026 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9027 }
9028
9029 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9030 In particular, the offset for the relocation is not the
9031 address of the PLT entry for this function, as specified
9032 by the ABI. Instead, the offset is set to the address of
9033 the GOT slot for this function. See EABI 4.4.4.1. */
9034 rela.r_offset = (htab->sgotplt->output_section->vma
9035 + htab->sgotplt->output_offset
9036 + got_offset);
9037
9038 }
9039 else
9040 {
9041 asection *splt = htab->plt;
9042 if (!htab->elf.dynamic_sections_created
9043 || h->dynindx == -1)
9044 splt = htab->iplt;
9045
9046 rela.r_offset = (splt->output_section->vma
9047 + splt->output_offset
9048 + ent->plt.offset);
9049 if (htab->plt_type == PLT_OLD
9050 || !htab->elf.dynamic_sections_created
9051 || h->dynindx == -1)
9052 {
9053 /* We don't need to fill in the .plt. The ppc dynamic
9054 linker will fill it in. */
9055 }
9056 else
9057 {
9058 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9059 + htab->glink->output_section->vma
9060 + htab->glink->output_offset);
9061 bfd_put_32 (output_bfd, val,
9062 splt->contents + ent->plt.offset);
9063 }
9064 }
9065
9066 /* Fill in the entry in the .rela.plt section. */
9067 rela.r_addend = 0;
9068 if (!htab->elf.dynamic_sections_created
9069 || h->dynindx == -1)
9070 {
9071 BFD_ASSERT (h->type == STT_GNU_IFUNC
9072 && h->def_regular
9073 && (h->root.type == bfd_link_hash_defined
9074 || h->root.type == bfd_link_hash_defweak));
9075 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9076 rela.r_addend = SYM_VAL (h);
9077 }
9078 else
9079 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9080
9081 if (!htab->elf.dynamic_sections_created
9082 || h->dynindx == -1)
9083 loc = (htab->reliplt->contents
9084 + (htab->reliplt->reloc_count++
9085 * sizeof (Elf32_External_Rela)));
9086 else
9087 loc = (htab->relplt->contents
9088 + reloc_index * sizeof (Elf32_External_Rela));
9089 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9090
9091 if (!h->def_regular)
9092 {
9093 /* Mark the symbol as undefined, rather than as
9094 defined in the .plt section. Leave the value if
9095 there were any relocations where pointer equality
9096 matters (this is a clue for the dynamic linker, to
9097 make function pointer comparisons work between an
9098 application and shared library), otherwise set it
9099 to zero. */
9100 sym->st_shndx = SHN_UNDEF;
9101 if (!h->pointer_equality_needed)
9102 sym->st_value = 0;
9103 else if (!h->ref_regular_nonweak)
9104 {
9105 /* This breaks function pointer comparisons, but
9106 that is better than breaking tests for a NULL
9107 function pointer. */
9108 sym->st_value = 0;
9109 }
9110 }
9111 else if (h->type == STT_GNU_IFUNC
9112 && !info->shared)
9113 {
9114 /* Set the value of ifunc symbols in a non-pie
9115 executable to the glink entry. This is to avoid
9116 text relocations. We can't do this for ifunc in
9117 allocate_dynrelocs, as we do for normal dynamic
9118 function symbols with plt entries, because we need
9119 to keep the original value around for the ifunc
9120 relocation. */
9121 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9122 (output_bfd, htab->glink->output_section));
9123 sym->st_value = (ent->glink_offset
9124 + htab->glink->output_offset
9125 + htab->glink->output_section->vma);
9126 }
9127 doneone = TRUE;
9128 }
9129
9130 if (htab->plt_type == PLT_NEW
9131 || !htab->elf.dynamic_sections_created
9132 || h->dynindx == -1)
9133 {
9134 unsigned char *p;
9135 asection *splt = htab->plt;
9136 if (!htab->elf.dynamic_sections_created
9137 || h->dynindx == -1)
9138 splt = htab->iplt;
9139
9140 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9141
9142 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
9143 {
9144 bfd_put_32 (output_bfd, LWZ_11_3, p);
9145 p += 4;
9146 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9147 p += 4;
9148 bfd_put_32 (output_bfd, MR_0_3, p);
9149 p += 4;
9150 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9151 p += 4;
9152 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9153 p += 4;
9154 bfd_put_32 (output_bfd, BEQLR, p);
9155 p += 4;
9156 bfd_put_32 (output_bfd, MR_3_0, p);
9157 p += 4;
9158 bfd_put_32 (output_bfd, NOP, p);
9159 p += 4;
9160 }
9161
9162 write_glink_stub (ent, splt, p, info);
9163
9164 if (!info->shared)
9165 /* We only need one non-PIC glink stub. */
9166 break;
9167 }
9168 else
9169 break;
9170 }
9171
9172 if (h->needs_copy)
9173 {
9174 asection *s;
9175 Elf_Internal_Rela rela;
9176 bfd_byte *loc;
9177
9178 /* This symbols needs a copy reloc. Set it up. */
9179
9180 #ifdef DEBUG
9181 fprintf (stderr, ", copy");
9182 #endif
9183
9184 BFD_ASSERT (h->dynindx != -1);
9185
9186 if (ppc_elf_hash_entry (h)->has_sda_refs)
9187 s = htab->relsbss;
9188 else
9189 s = htab->relbss;
9190 BFD_ASSERT (s != NULL);
9191
9192 rela.r_offset = SYM_VAL (h);
9193 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9194 rela.r_addend = 0;
9195 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9196 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9197 }
9198
9199 #ifdef DEBUG
9200 fprintf (stderr, "\n");
9201 #endif
9202
9203 return TRUE;
9204 }
9205 \f
9206 static enum elf_reloc_type_class
9207 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
9208 {
9209 switch (ELF32_R_TYPE (rela->r_info))
9210 {
9211 case R_PPC_RELATIVE:
9212 return reloc_class_relative;
9213 case R_PPC_REL24:
9214 case R_PPC_ADDR24:
9215 case R_PPC_JMP_SLOT:
9216 return reloc_class_plt;
9217 case R_PPC_COPY:
9218 return reloc_class_copy;
9219 default:
9220 return reloc_class_normal;
9221 }
9222 }
9223 \f
9224 /* Finish up the dynamic sections. */
9225
9226 static bfd_boolean
9227 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9228 struct bfd_link_info *info)
9229 {
9230 asection *sdyn;
9231 asection *splt;
9232 struct ppc_elf_link_hash_table *htab;
9233 bfd_vma got;
9234 bfd *dynobj;
9235 bfd_boolean ret = TRUE;
9236
9237 #ifdef DEBUG
9238 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9239 #endif
9240
9241 htab = ppc_elf_hash_table (info);
9242 dynobj = elf_hash_table (info)->dynobj;
9243 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9244 if (htab->is_vxworks)
9245 splt = bfd_get_linker_section (dynobj, ".plt");
9246 else
9247 splt = NULL;
9248
9249 got = 0;
9250 if (htab->elf.hgot != NULL)
9251 got = SYM_VAL (htab->elf.hgot);
9252
9253 if (htab->elf.dynamic_sections_created)
9254 {
9255 Elf32_External_Dyn *dyncon, *dynconend;
9256
9257 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9258
9259 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9260 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9261 for (; dyncon < dynconend; dyncon++)
9262 {
9263 Elf_Internal_Dyn dyn;
9264 asection *s;
9265
9266 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9267
9268 switch (dyn.d_tag)
9269 {
9270 case DT_PLTGOT:
9271 if (htab->is_vxworks)
9272 s = htab->sgotplt;
9273 else
9274 s = htab->plt;
9275 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9276 break;
9277
9278 case DT_PLTRELSZ:
9279 dyn.d_un.d_val = htab->relplt->size;
9280 break;
9281
9282 case DT_JMPREL:
9283 s = htab->relplt;
9284 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9285 break;
9286
9287 case DT_PPC_GOT:
9288 dyn.d_un.d_ptr = got;
9289 break;
9290
9291 case DT_RELASZ:
9292 if (htab->is_vxworks)
9293 {
9294 if (htab->relplt)
9295 dyn.d_un.d_ptr -= htab->relplt->size;
9296 break;
9297 }
9298 continue;
9299
9300 default:
9301 if (htab->is_vxworks
9302 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9303 break;
9304 continue;
9305 }
9306
9307 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9308 }
9309 }
9310
9311 if (htab->got != NULL)
9312 {
9313 if (htab->elf.hgot->root.u.def.section == htab->got
9314 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9315 {
9316 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9317
9318 p += htab->elf.hgot->root.u.def.value;
9319 if (htab->plt_type == PLT_OLD)
9320 {
9321 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9322 so that a function can easily find the address of
9323 _GLOBAL_OFFSET_TABLE_. */
9324 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9325 < htab->elf.hgot->root.u.def.section->size);
9326 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9327 }
9328
9329 if (sdyn != NULL)
9330 {
9331 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9332 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9333 < htab->elf.hgot->root.u.def.section->size);
9334 bfd_put_32 (output_bfd, val, p);
9335 }
9336 }
9337 else
9338 {
9339 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9340 htab->elf.hgot->root.root.string,
9341 (htab->sgotplt != NULL
9342 ? htab->sgotplt->name : htab->got->name));
9343 bfd_set_error (bfd_error_bad_value);
9344 ret = FALSE;
9345 }
9346
9347 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9348 }
9349
9350 /* Fill in the first entry in the VxWorks procedure linkage table. */
9351 if (splt && splt->size > 0)
9352 {
9353 /* Use the right PLT. */
9354 const bfd_vma *plt_entry = (info->shared
9355 ? ppc_elf_vxworks_pic_plt0_entry
9356 : ppc_elf_vxworks_plt0_entry);
9357
9358 if (!info->shared)
9359 {
9360 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9361
9362 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9363 splt->contents + 0);
9364 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9365 splt->contents + 4);
9366 }
9367 else
9368 {
9369 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9370 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9371 }
9372 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9373 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9374 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9375 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9376 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9377 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9378
9379 if (! info->shared)
9380 {
9381 Elf_Internal_Rela rela;
9382 bfd_byte *loc;
9383
9384 loc = htab->srelplt2->contents;
9385
9386 /* Output the @ha relocation for the first instruction. */
9387 rela.r_offset = (htab->plt->output_section->vma
9388 + htab->plt->output_offset
9389 + 2);
9390 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9391 rela.r_addend = 0;
9392 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9393 loc += sizeof (Elf32_External_Rela);
9394
9395 /* Output the @l relocation for the second instruction. */
9396 rela.r_offset = (htab->plt->output_section->vma
9397 + htab->plt->output_offset
9398 + 6);
9399 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9400 rela.r_addend = 0;
9401 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9402 loc += sizeof (Elf32_External_Rela);
9403
9404 /* Fix up the remaining relocations. They may have the wrong
9405 symbol index for _G_O_T_ or _P_L_T_ depending on the order
9406 in which symbols were output. */
9407 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
9408 {
9409 Elf_Internal_Rela rel;
9410
9411 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9412 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9413 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9414 loc += sizeof (Elf32_External_Rela);
9415
9416 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9417 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9418 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9419 loc += sizeof (Elf32_External_Rela);
9420
9421 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9422 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
9423 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9424 loc += sizeof (Elf32_External_Rela);
9425 }
9426 }
9427 }
9428
9429 if (htab->glink != NULL
9430 && htab->glink->contents != NULL
9431 && htab->elf.dynamic_sections_created)
9432 {
9433 unsigned char *p;
9434 unsigned char *endp;
9435 bfd_vma res0;
9436 unsigned int i;
9437
9438 /*
9439 * PIC glink code is the following:
9440 *
9441 * # ith PLT code stub.
9442 * addis 11,30,(plt+(i-1)*4-got)@ha
9443 * lwz 11,(plt+(i-1)*4-got)@l(11)
9444 * mtctr 11
9445 * bctr
9446 *
9447 * # A table of branches, one for each plt entry.
9448 * # The idea is that the plt call stub loads ctr and r11 with these
9449 * # addresses, so (r11 - res_0) gives the plt index * 4.
9450 * res_0: b PLTresolve
9451 * res_1: b PLTresolve
9452 * .
9453 * # Some number of entries towards the end can be nops
9454 * res_n_m3: nop
9455 * res_n_m2: nop
9456 * res_n_m1:
9457 *
9458 * PLTresolve:
9459 * addis 11,11,(1f-res_0)@ha
9460 * mflr 0
9461 * bcl 20,31,1f
9462 * 1: addi 11,11,(1b-res_0)@l
9463 * mflr 12
9464 * mtlr 0
9465 * sub 11,11,12 # r11 = index * 4
9466 * addis 12,12,(got+4-1b)@ha
9467 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
9468 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
9469 * mtctr 0
9470 * add 0,11,11
9471 * add 11,0,11 # r11 = index * 12 = reloc offset.
9472 * bctr
9473 */
9474 static const unsigned int pic_plt_resolve[] =
9475 {
9476 ADDIS_11_11,
9477 MFLR_0,
9478 BCL_20_31,
9479 ADDI_11_11,
9480 MFLR_12,
9481 MTLR_0,
9482 SUB_11_11_12,
9483 ADDIS_12_12,
9484 LWZ_0_12,
9485 LWZ_12_12,
9486 MTCTR_0,
9487 ADD_0_11_11,
9488 ADD_11_0_11,
9489 BCTR,
9490 NOP,
9491 NOP
9492 };
9493
9494 /*
9495 * Non-PIC glink code is a little simpler.
9496 *
9497 * # ith PLT code stub.
9498 * lis 11,(plt+(i-1)*4)@ha
9499 * lwz 11,(plt+(i-1)*4)@l(11)
9500 * mtctr 11
9501 * bctr
9502 *
9503 * The branch table is the same, then comes
9504 *
9505 * PLTresolve:
9506 * lis 12,(got+4)@ha
9507 * addis 11,11,(-res_0)@ha
9508 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
9509 * addi 11,11,(-res_0)@l # r11 = index * 4
9510 * mtctr 0
9511 * add 0,11,11
9512 * lwz 12,(got+8)@l(12) # got[2] contains the map address
9513 * add 11,0,11 # r11 = index * 12 = reloc offset.
9514 * bctr
9515 */
9516 static const unsigned int plt_resolve[] =
9517 {
9518 LIS_12,
9519 ADDIS_11_11,
9520 LWZ_0_12,
9521 ADDI_11_11,
9522 MTCTR_0,
9523 ADD_0_11_11,
9524 LWZ_12_12,
9525 ADD_11_0_11,
9526 BCTR,
9527 NOP,
9528 NOP,
9529 NOP,
9530 NOP,
9531 NOP,
9532 NOP,
9533 NOP
9534 };
9535
9536 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
9537 abort ();
9538 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
9539 abort ();
9540
9541 /* Build the branch table, one for each plt entry (less one),
9542 and perhaps some padding. */
9543 p = htab->glink->contents;
9544 p += htab->glink_pltresolve;
9545 endp = htab->glink->contents;
9546 endp += htab->glink->size - GLINK_PLTRESOLVE;
9547 while (p < endp - 8 * 4)
9548 {
9549 bfd_put_32 (output_bfd, B + endp - p, p);
9550 p += 4;
9551 }
9552 while (p < endp)
9553 {
9554 bfd_put_32 (output_bfd, NOP, p);
9555 p += 4;
9556 }
9557
9558 res0 = (htab->glink_pltresolve
9559 + htab->glink->output_section->vma
9560 + htab->glink->output_offset);
9561
9562 /* Last comes the PLTresolve stub. */
9563 if (info->shared)
9564 {
9565 bfd_vma bcl;
9566
9567 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
9568 {
9569 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
9570 p += 4;
9571 }
9572 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
9573
9574 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
9575 + htab->glink->output_section->vma
9576 + htab->glink->output_offset);
9577
9578 bfd_put_32 (output_bfd,
9579 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
9580 bfd_put_32 (output_bfd,
9581 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
9582 bfd_put_32 (output_bfd,
9583 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
9584 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
9585 {
9586 bfd_put_32 (output_bfd,
9587 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
9588 bfd_put_32 (output_bfd,
9589 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
9590 }
9591 else
9592 {
9593 bfd_put_32 (output_bfd,
9594 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
9595 bfd_put_32 (output_bfd,
9596 LWZ_12_12 + 4, p + 9*4);
9597 }
9598 }
9599 else
9600 {
9601 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
9602 {
9603 bfd_put_32 (output_bfd, plt_resolve[i], p);
9604 p += 4;
9605 }
9606 p -= 4 * ARRAY_SIZE (plt_resolve);
9607
9608 bfd_put_32 (output_bfd,
9609 LIS_12 + PPC_HA (got + 4), p + 0*4);
9610 bfd_put_32 (output_bfd,
9611 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
9612 bfd_put_32 (output_bfd,
9613 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
9614 if (PPC_HA (got + 4) == PPC_HA (got + 8))
9615 {
9616 bfd_put_32 (output_bfd,
9617 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
9618 bfd_put_32 (output_bfd,
9619 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
9620 }
9621 else
9622 {
9623 bfd_put_32 (output_bfd,
9624 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
9625 bfd_put_32 (output_bfd,
9626 LWZ_12_12 + 4, p + 6*4);
9627 }
9628 }
9629 }
9630
9631 if (htab->glink_eh_frame != NULL
9632 && htab->glink_eh_frame->contents != NULL)
9633 {
9634 unsigned char *p = htab->glink_eh_frame->contents;
9635 bfd_vma val;
9636
9637 p += sizeof (glink_eh_frame_cie);
9638 /* FDE length. */
9639 p += 4;
9640 /* CIE pointer. */
9641 p += 4;
9642 /* Offset to .glink. */
9643 val = (htab->glink->output_section->vma
9644 + htab->glink->output_offset);
9645 val -= (htab->glink_eh_frame->output_section->vma
9646 + htab->glink_eh_frame->output_offset);
9647 val -= p - htab->glink_eh_frame->contents;
9648 bfd_put_32 (htab->elf.dynobj, val, p);
9649
9650 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
9651 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
9652 htab->glink_eh_frame,
9653 htab->glink_eh_frame->contents))
9654 return FALSE;
9655 }
9656
9657 return ret;
9658 }
9659 \f
9660 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
9661 #define TARGET_LITTLE_NAME "elf32-powerpcle"
9662 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
9663 #define TARGET_BIG_NAME "elf32-powerpc"
9664 #define ELF_ARCH bfd_arch_powerpc
9665 #define ELF_TARGET_ID PPC32_ELF_DATA
9666 #define ELF_MACHINE_CODE EM_PPC
9667 #ifdef __QNXTARGET__
9668 #define ELF_MAXPAGESIZE 0x1000
9669 #else
9670 #define ELF_MAXPAGESIZE 0x10000
9671 #endif
9672 #define ELF_MINPAGESIZE 0x1000
9673 #define ELF_COMMONPAGESIZE 0x1000
9674 #define elf_info_to_howto ppc_elf_info_to_howto
9675
9676 #ifdef EM_CYGNUS_POWERPC
9677 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
9678 #endif
9679
9680 #ifdef EM_PPC_OLD
9681 #define ELF_MACHINE_ALT2 EM_PPC_OLD
9682 #endif
9683
9684 #define elf_backend_plt_not_loaded 1
9685 #define elf_backend_can_gc_sections 1
9686 #define elf_backend_can_refcount 1
9687 #define elf_backend_rela_normal 1
9688
9689 #define bfd_elf32_mkobject ppc_elf_mkobject
9690 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
9691 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
9692 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
9693 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
9694 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
9695 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
9696 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
9697
9698 #define elf_backend_object_p ppc_elf_object_p
9699 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
9700 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
9701 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
9702 #define elf_backend_relocate_section ppc_elf_relocate_section
9703 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
9704 #define elf_backend_check_relocs ppc_elf_check_relocs
9705 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
9706 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
9707 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
9708 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
9709 #define elf_backend_hash_symbol ppc_elf_hash_symbol
9710 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
9711 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
9712 #define elf_backend_fake_sections ppc_elf_fake_sections
9713 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
9714 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
9715 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
9716 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
9717 #define elf_backend_write_core_note ppc_elf_write_core_note
9718 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
9719 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
9720 #define elf_backend_final_write_processing ppc_elf_final_write_processing
9721 #define elf_backend_write_section ppc_elf_write_section
9722 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
9723 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
9724 #define elf_backend_action_discarded ppc_elf_action_discarded
9725 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
9726 #define elf_backend_post_process_headers _bfd_elf_set_osabi
9727 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
9728 #define elf_backend_section_processing ppc_elf_section_processing
9729
9730 #include "elf32-target.h"
9731
9732 /* FreeBSD Target */
9733
9734 #undef TARGET_LITTLE_SYM
9735 #undef TARGET_LITTLE_NAME
9736
9737 #undef TARGET_BIG_SYM
9738 #define TARGET_BIG_SYM bfd_elf32_powerpc_freebsd_vec
9739 #undef TARGET_BIG_NAME
9740 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
9741
9742 #undef ELF_OSABI
9743 #define ELF_OSABI ELFOSABI_FREEBSD
9744
9745 #undef elf32_bed
9746 #define elf32_bed elf32_powerpc_fbsd_bed
9747
9748 #include "elf32-target.h"
9749
9750 /* VxWorks Target */
9751
9752 #undef TARGET_LITTLE_SYM
9753 #undef TARGET_LITTLE_NAME
9754
9755 #undef TARGET_BIG_SYM
9756 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
9757 #undef TARGET_BIG_NAME
9758 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
9759
9760 #undef ELF_OSABI
9761
9762 /* VxWorks uses the elf default section flags for .plt. */
9763 static const struct bfd_elf_special_section *
9764 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9765 {
9766 if (sec->name == NULL)
9767 return NULL;
9768
9769 if (strcmp (sec->name, ".plt") == 0)
9770 return _bfd_elf_get_sec_type_attr (abfd, sec);
9771
9772 return ppc_elf_get_sec_type_attr (abfd, sec);
9773 }
9774
9775 /* Like ppc_elf_link_hash_table_create, but overrides
9776 appropriately for VxWorks. */
9777 static struct bfd_link_hash_table *
9778 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9779 {
9780 struct bfd_link_hash_table *ret;
9781
9782 ret = ppc_elf_link_hash_table_create (abfd);
9783 if (ret)
9784 {
9785 struct ppc_elf_link_hash_table *htab
9786 = (struct ppc_elf_link_hash_table *)ret;
9787 htab->is_vxworks = 1;
9788 htab->plt_type = PLT_VXWORKS;
9789 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
9790 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
9791 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
9792 }
9793 return ret;
9794 }
9795
9796 /* Tweak magic VxWorks symbols as they are loaded. */
9797 static bfd_boolean
9798 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
9799 struct bfd_link_info *info,
9800 Elf_Internal_Sym *sym,
9801 const char **namep ATTRIBUTE_UNUSED,
9802 flagword *flagsp ATTRIBUTE_UNUSED,
9803 asection **secp,
9804 bfd_vma *valp)
9805 {
9806 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
9807 valp))
9808 return FALSE;
9809
9810 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
9811 }
9812
9813 static void
9814 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
9815 {
9816 ppc_elf_final_write_processing(abfd, linker);
9817 elf_vxworks_final_write_processing(abfd, linker);
9818 }
9819
9820 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
9821 define it. */
9822 #undef elf_backend_want_plt_sym
9823 #define elf_backend_want_plt_sym 1
9824 #undef elf_backend_want_got_plt
9825 #define elf_backend_want_got_plt 1
9826 #undef elf_backend_got_symbol_offset
9827 #define elf_backend_got_symbol_offset 0
9828 #undef elf_backend_plt_not_loaded
9829 #define elf_backend_plt_not_loaded 0
9830 #undef elf_backend_plt_readonly
9831 #define elf_backend_plt_readonly 1
9832 #undef elf_backend_got_header_size
9833 #define elf_backend_got_header_size 12
9834
9835 #undef bfd_elf32_get_synthetic_symtab
9836
9837 #undef bfd_elf32_bfd_link_hash_table_create
9838 #define bfd_elf32_bfd_link_hash_table_create \
9839 ppc_elf_vxworks_link_hash_table_create
9840 #undef elf_backend_add_symbol_hook
9841 #define elf_backend_add_symbol_hook \
9842 ppc_elf_vxworks_add_symbol_hook
9843 #undef elf_backend_link_output_symbol_hook
9844 #define elf_backend_link_output_symbol_hook \
9845 elf_vxworks_link_output_symbol_hook
9846 #undef elf_backend_final_write_processing
9847 #define elf_backend_final_write_processing \
9848 ppc_elf_vxworks_final_write_processing
9849 #undef elf_backend_get_sec_type_attr
9850 #define elf_backend_get_sec_type_attr \
9851 ppc_elf_vxworks_get_sec_type_attr
9852 #undef elf_backend_emit_relocs
9853 #define elf_backend_emit_relocs \
9854 elf_vxworks_emit_relocs
9855
9856 #undef elf32_bed
9857 #define elf32_bed ppc_elf_vxworks_bed
9858 #undef elf_backend_post_process_headers
9859
9860 #include "elf32-target.h"
GDB Binutils - Deliverables
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