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Error on shared lib call to @local ifunc
[binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Written by Ian Lance Taylor, Cygnus Support.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the
21 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
22 Boston, MA 02110-1301, USA. */
23
24
25 /* This file is based on a preliminary PowerPC ELF ABI. The
26 information may not match the final PowerPC ELF ABI. It includes
27 suggestions from the in-progress Embedded PowerPC ABI, and that
28 information may also not match. */
29
30 #include "sysdep.h"
31 #include <stdarg.h>
32 #include "bfd.h"
33 #include "bfdlink.h"
34 #include "libbfd.h"
35 #include "elf-bfd.h"
36 #include "elf/ppc.h"
37 #include "elf32-ppc.h"
38 #include "elf-vxworks.h"
39 #include "dwarf2.h"
40 #include "elf-linux-psinfo.h"
41
42 typedef enum split16_format_type
43 {
44 split16a_type = 0,
45 split16d_type
46 }
47 split16_format_type;
48
49 /* RELA relocations are used here. */
50
51 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc_elf_unhandled_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static void ppc_elf_vle_split16
56 (bfd *, bfd_byte *, bfd_vma, bfd_vma, split16_format_type);
57
58 /* Branch prediction bit for branch taken relocs. */
59 #define BRANCH_PREDICT_BIT 0x200000
60 /* Mask to set RA in memory instructions. */
61 #define RA_REGISTER_MASK 0x001f0000
62 /* Value to shift register by to insert RA. */
63 #define RA_REGISTER_SHIFT 16
64
65 /* The name of the dynamic interpreter. This is put in the .interp
66 section. */
67 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
68
69 /* For old-style PLT. */
70 /* The number of single-slot PLT entries (the rest use two slots). */
71 #define PLT_NUM_SINGLE_ENTRIES 8192
72
73 /* For new-style .glink and .plt. */
74 #define GLINK_PLTRESOLVE 16*4
75 #define GLINK_ENTRY_SIZE 4*4
76 #define TLS_GET_ADDR_GLINK_SIZE 12*4
77
78 /* VxWorks uses its own plt layout, filled in by the static linker. */
79
80 /* The standard VxWorks PLT entry. */
81 #define VXWORKS_PLT_ENTRY_SIZE 32
82 static const bfd_vma ppc_elf_vxworks_plt_entry
83 [VXWORKS_PLT_ENTRY_SIZE / 4] =
84 {
85 0x3d800000, /* lis r12,0 */
86 0x818c0000, /* lwz r12,0(r12) */
87 0x7d8903a6, /* mtctr r12 */
88 0x4e800420, /* bctr */
89 0x39600000, /* li r11,0 */
90 0x48000000, /* b 14 <.PLT0resolve+0x4> */
91 0x60000000, /* nop */
92 0x60000000, /* nop */
93 };
94 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
95 [VXWORKS_PLT_ENTRY_SIZE / 4] =
96 {
97 0x3d9e0000, /* addis r12,r30,0 */
98 0x818c0000, /* lwz r12,0(r12) */
99 0x7d8903a6, /* mtctr r12 */
100 0x4e800420, /* bctr */
101 0x39600000, /* li r11,0 */
102 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106
107 /* The initial VxWorks PLT entry. */
108 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
109 static const bfd_vma ppc_elf_vxworks_plt0_entry
110 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
111 {
112 0x3d800000, /* lis r12,0 */
113 0x398c0000, /* addi r12,r12,0 */
114 0x800c0008, /* lwz r0,8(r12) */
115 0x7c0903a6, /* mtctr r0 */
116 0x818c0004, /* lwz r12,4(r12) */
117 0x4e800420, /* bctr */
118 0x60000000, /* nop */
119 0x60000000, /* nop */
120 };
121 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
122 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
123 {
124 0x819e0008, /* lwz r12,8(r30) */
125 0x7d8903a6, /* mtctr r12 */
126 0x819e0004, /* lwz r12,4(r30) */
127 0x4e800420, /* bctr */
128 0x60000000, /* nop */
129 0x60000000, /* nop */
130 0x60000000, /* nop */
131 0x60000000, /* nop */
132 };
133
134 /* For executables, we have some additional relocations in
135 .rela.plt.unloaded, for the kernel loader. */
136
137 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
138 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
139 /* The number of relocations in the PLTResolve slot. */
140 #define VXWORKS_PLTRESOLVE_RELOCS 2
141 /* The number of relocations in the PLTResolve slot when when creating
142 a shared library. */
143 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
144
145 /* Some instructions. */
146 #define ADDIS_11_11 0x3d6b0000
147 #define ADDIS_11_30 0x3d7e0000
148 #define ADDIS_12_12 0x3d8c0000
149 #define ADDI_11_11 0x396b0000
150 #define ADD_0_11_11 0x7c0b5a14
151 #define ADD_3_12_2 0x7c6c1214
152 #define ADD_11_0_11 0x7d605a14
153 #define B 0x48000000
154 #define BCL_20_31 0x429f0005
155 #define BCTR 0x4e800420
156 #define BEQLR 0x4d820020
157 #define CMPWI_11_0 0x2c0b0000
158 #define LIS_11 0x3d600000
159 #define LIS_12 0x3d800000
160 #define LWZU_0_12 0x840c0000
161 #define LWZ_0_12 0x800c0000
162 #define LWZ_11_3 0x81630000
163 #define LWZ_11_11 0x816b0000
164 #define LWZ_11_30 0x817e0000
165 #define LWZ_12_3 0x81830000
166 #define LWZ_12_12 0x818c0000
167 #define MR_0_3 0x7c601b78
168 #define MR_3_0 0x7c030378
169 #define MFLR_0 0x7c0802a6
170 #define MFLR_12 0x7d8802a6
171 #define MTCTR_0 0x7c0903a6
172 #define MTCTR_11 0x7d6903a6
173 #define MTLR_0 0x7c0803a6
174 #define NOP 0x60000000
175 #define SUB_11_11_12 0x7d6c5850
176
177 /* Offset of tp and dtp pointers from start of TLS block. */
178 #define TP_OFFSET 0x7000
179 #define DTP_OFFSET 0x8000
180
181 /* The value of a defined global symbol. */
182 #define SYM_VAL(SYM) \
183 ((SYM)->root.u.def.section->output_section->vma \
184 + (SYM)->root.u.def.section->output_offset \
185 + (SYM)->root.u.def.value)
186 \f
187 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
188
189 static reloc_howto_type ppc_elf_howto_raw[] = {
190 /* This reloc does nothing. */
191 HOWTO (R_PPC_NONE, /* type */
192 0, /* rightshift */
193 2, /* size (0 = byte, 1 = short, 2 = long) */
194 32, /* bitsize */
195 FALSE, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_bitfield, /* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_PPC_NONE", /* name */
200 FALSE, /* partial_inplace */
201 0, /* src_mask */
202 0, /* dst_mask */
203 FALSE), /* pcrel_offset */
204
205 /* A standard 32 bit relocation. */
206 HOWTO (R_PPC_ADDR32, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_bitfield, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_PPC_ADDR32", /* name */
215 FALSE, /* partial_inplace */
216 0, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* An absolute 26 bit branch; the lower two bits must be zero.
221 FIXME: we don't check that, we just clear them. */
222 HOWTO (R_PPC_ADDR24, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 26, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_bitfield, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC_ADDR24", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0x3fffffc, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 16 bit relocation. */
237 HOWTO (R_PPC_ADDR16, /* type */
238 0, /* rightshift */
239 1, /* size (0 = byte, 1 = short, 2 = long) */
240 16, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC_ADDR16", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* A 16 bit relocation without overflow. */
252 HOWTO (R_PPC_ADDR16_LO, /* type */
253 0, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_dont,/* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC_ADDR16_LO", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0xffff, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* The high order 16 bits of an address. */
267 HOWTO (R_PPC_ADDR16_HI, /* type */
268 16, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC_ADDR16_HI", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* The high order 16 bits of an address, plus 1 if the contents of
282 the low 16 bits, treated as a signed number, is negative. */
283 HOWTO (R_PPC_ADDR16_HA, /* type */
284 16, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont, /* complain_on_overflow */
290 ppc_elf_addr16_ha_reloc, /* special_function */
291 "R_PPC_ADDR16_HA", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* An absolute 16 bit branch; the lower two bits must be zero.
298 FIXME: we don't check that, we just clear them. */
299 HOWTO (R_PPC_ADDR14, /* type */
300 0, /* rightshift */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
302 16, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_bitfield, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_PPC_ADDR14", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0xfffc, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 /* An absolute 16 bit branch, for which bit 10 should be set to
314 indicate that the branch is expected to be taken. The lower two
315 bits must be zero. */
316 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 0, /* bitpos */
322 complain_overflow_bitfield, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_PPC_ADDR14_BRTAKEN",/* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0xfffc, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* An absolute 16 bit branch, for which bit 10 should be set to
331 indicate that the branch is not expected to be taken. The lower
332 two bits must be zero. */
333 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 16, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* special_function */
341 "R_PPC_ADDR14_BRNTAKEN",/* name */
342 FALSE, /* partial_inplace */
343 0, /* src_mask */
344 0xfffc, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 /* A relative 26 bit branch; the lower two bits must be zero. */
348 HOWTO (R_PPC_REL24, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 26, /* bitsize */
352 TRUE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_signed, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_PPC_REL24", /* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0x3fffffc, /* dst_mask */
360 TRUE), /* pcrel_offset */
361
362 /* A relative 16 bit branch; the lower two bits must be zero. */
363 HOWTO (R_PPC_REL14, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 16, /* bitsize */
367 TRUE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_signed, /* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_PPC_REL14", /* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0xfffc, /* dst_mask */
375 TRUE), /* pcrel_offset */
376
377 /* A relative 16 bit branch. Bit 10 should be set to indicate that
378 the branch is expected to be taken. The lower two bits must be
379 zero. */
380 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
381 0, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 TRUE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_signed, /* complain_on_overflow */
387 bfd_elf_generic_reloc, /* special_function */
388 "R_PPC_REL14_BRTAKEN", /* name */
389 FALSE, /* partial_inplace */
390 0, /* src_mask */
391 0xfffc, /* dst_mask */
392 TRUE), /* pcrel_offset */
393
394 /* A relative 16 bit branch. Bit 10 should be set to indicate that
395 the branch is not expected to be taken. The lower two bits must
396 be zero. */
397 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
398 0, /* rightshift */
399 2, /* size (0 = byte, 1 = short, 2 = long) */
400 16, /* bitsize */
401 TRUE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_signed, /* complain_on_overflow */
404 bfd_elf_generic_reloc, /* special_function */
405 "R_PPC_REL14_BRNTAKEN",/* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0xfffc, /* dst_mask */
409 TRUE), /* pcrel_offset */
410
411 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
412 symbol. */
413 HOWTO (R_PPC_GOT16, /* type */
414 0, /* rightshift */
415 1, /* size (0 = byte, 1 = short, 2 = long) */
416 16, /* bitsize */
417 FALSE, /* pc_relative */
418 0, /* bitpos */
419 complain_overflow_signed, /* complain_on_overflow */
420 bfd_elf_generic_reloc, /* special_function */
421 "R_PPC_GOT16", /* name */
422 FALSE, /* partial_inplace */
423 0, /* src_mask */
424 0xffff, /* dst_mask */
425 FALSE), /* pcrel_offset */
426
427 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
428 the symbol. */
429 HOWTO (R_PPC_GOT16_LO, /* type */
430 0, /* rightshift */
431 1, /* size (0 = byte, 1 = short, 2 = long) */
432 16, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
435 complain_overflow_dont, /* complain_on_overflow */
436 bfd_elf_generic_reloc, /* special_function */
437 "R_PPC_GOT16_LO", /* name */
438 FALSE, /* partial_inplace */
439 0, /* src_mask */
440 0xffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
442
443 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
444 the symbol. */
445 HOWTO (R_PPC_GOT16_HI, /* type */
446 16, /* rightshift */
447 1, /* size (0 = byte, 1 = short, 2 = long) */
448 16, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_bitfield, /* complain_on_overflow */
452 bfd_elf_generic_reloc, /* special_function */
453 "R_PPC_GOT16_HI", /* name */
454 FALSE, /* partial_inplace */
455 0, /* src_mask */
456 0xffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
460 the symbol. */
461 HOWTO (R_PPC_GOT16_HA, /* type */
462 16, /* rightshift */
463 1, /* size (0 = byte, 1 = short, 2 = long) */
464 16, /* bitsize */
465 FALSE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_bitfield, /* complain_on_overflow */
468 ppc_elf_addr16_ha_reloc, /* special_function */
469 "R_PPC_GOT16_HA", /* name */
470 FALSE, /* partial_inplace */
471 0, /* src_mask */
472 0xffff, /* dst_mask */
473 FALSE), /* pcrel_offset */
474
475 /* Like R_PPC_REL24, but referring to the procedure linkage table
476 entry for the symbol. */
477 HOWTO (R_PPC_PLTREL24, /* type */
478 0, /* rightshift */
479 2, /* size (0 = byte, 1 = short, 2 = long) */
480 26, /* bitsize */
481 TRUE, /* pc_relative */
482 0, /* bitpos */
483 complain_overflow_signed, /* complain_on_overflow */
484 bfd_elf_generic_reloc, /* special_function */
485 "R_PPC_PLTREL24", /* name */
486 FALSE, /* partial_inplace */
487 0, /* src_mask */
488 0x3fffffc, /* dst_mask */
489 TRUE), /* pcrel_offset */
490
491 /* This is used only by the dynamic linker. The symbol should exist
492 both in the object being run and in some shared library. The
493 dynamic linker copies the data addressed by the symbol from the
494 shared library into the object, because the object being
495 run has to have the data at some particular address. */
496 HOWTO (R_PPC_COPY, /* type */
497 0, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 32, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_PPC_COPY", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC_ADDR32, but used when setting global offset table
511 entries. */
512 HOWTO (R_PPC_GLOB_DAT, /* type */
513 0, /* rightshift */
514 2, /* size (0 = byte, 1 = short, 2 = long) */
515 32, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_bitfield, /* complain_on_overflow */
519 bfd_elf_generic_reloc, /* special_function */
520 "R_PPC_GLOB_DAT", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffffffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Marks a procedure linkage table entry for a symbol. */
527 HOWTO (R_PPC_JMP_SLOT, /* type */
528 0, /* rightshift */
529 2, /* size (0 = byte, 1 = short, 2 = long) */
530 32, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_bitfield, /* complain_on_overflow */
534 bfd_elf_generic_reloc, /* special_function */
535 "R_PPC_JMP_SLOT", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 0, /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Used only by the dynamic linker. When the object is run, this
542 longword is set to the load address of the object, plus the
543 addend. */
544 HOWTO (R_PPC_RELATIVE, /* type */
545 0, /* rightshift */
546 2, /* size (0 = byte, 1 = short, 2 = long) */
547 32, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_bitfield, /* complain_on_overflow */
551 bfd_elf_generic_reloc, /* special_function */
552 "R_PPC_RELATIVE", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffffffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* Like R_PPC_REL24, but uses the value of the symbol within the
559 object rather than the final value. Normally used for
560 _GLOBAL_OFFSET_TABLE_. */
561 HOWTO (R_PPC_LOCAL24PC, /* type */
562 0, /* rightshift */
563 2, /* size (0 = byte, 1 = short, 2 = long) */
564 26, /* bitsize */
565 TRUE, /* pc_relative */
566 0, /* bitpos */
567 complain_overflow_signed, /* complain_on_overflow */
568 bfd_elf_generic_reloc, /* special_function */
569 "R_PPC_LOCAL24PC", /* name */
570 FALSE, /* partial_inplace */
571 0, /* src_mask */
572 0x3fffffc, /* dst_mask */
573 TRUE), /* pcrel_offset */
574
575 /* Like R_PPC_ADDR32, but may be unaligned. */
576 HOWTO (R_PPC_UADDR32, /* type */
577 0, /* rightshift */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
579 32, /* bitsize */
580 FALSE, /* pc_relative */
581 0, /* bitpos */
582 complain_overflow_bitfield, /* complain_on_overflow */
583 bfd_elf_generic_reloc, /* special_function */
584 "R_PPC_UADDR32", /* name */
585 FALSE, /* partial_inplace */
586 0, /* src_mask */
587 0xffffffff, /* dst_mask */
588 FALSE), /* pcrel_offset */
589
590 /* Like R_PPC_ADDR16, but may be unaligned. */
591 HOWTO (R_PPC_UADDR16, /* type */
592 0, /* rightshift */
593 1, /* size (0 = byte, 1 = short, 2 = long) */
594 16, /* bitsize */
595 FALSE, /* pc_relative */
596 0, /* bitpos */
597 complain_overflow_bitfield, /* complain_on_overflow */
598 bfd_elf_generic_reloc, /* special_function */
599 "R_PPC_UADDR16", /* name */
600 FALSE, /* partial_inplace */
601 0, /* src_mask */
602 0xffff, /* dst_mask */
603 FALSE), /* pcrel_offset */
604
605 /* 32-bit PC relative */
606 HOWTO (R_PPC_REL32, /* type */
607 0, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 32, /* bitsize */
610 TRUE, /* pc_relative */
611 0, /* bitpos */
612 complain_overflow_bitfield, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC_REL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* 32-bit relocation to the symbol's procedure linkage table.
621 FIXME: not supported. */
622 HOWTO (R_PPC_PLT32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC_PLT32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
637 FIXME: not supported. */
638 HOWTO (R_PPC_PLTREL32, /* type */
639 0, /* rightshift */
640 2, /* size (0 = byte, 1 = short, 2 = long) */
641 32, /* bitsize */
642 TRUE, /* pc_relative */
643 0, /* bitpos */
644 complain_overflow_bitfield, /* complain_on_overflow */
645 bfd_elf_generic_reloc, /* special_function */
646 "R_PPC_PLTREL32", /* name */
647 FALSE, /* partial_inplace */
648 0, /* src_mask */
649 0, /* dst_mask */
650 TRUE), /* pcrel_offset */
651
652 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
653 the symbol. */
654 HOWTO (R_PPC_PLT16_LO, /* type */
655 0, /* rightshift */
656 1, /* size (0 = byte, 1 = short, 2 = long) */
657 16, /* bitsize */
658 FALSE, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_dont, /* complain_on_overflow */
661 bfd_elf_generic_reloc, /* special_function */
662 "R_PPC_PLT16_LO", /* name */
663 FALSE, /* partial_inplace */
664 0, /* src_mask */
665 0xffff, /* dst_mask */
666 FALSE), /* pcrel_offset */
667
668 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
669 the symbol. */
670 HOWTO (R_PPC_PLT16_HI, /* type */
671 16, /* rightshift */
672 1, /* size (0 = byte, 1 = short, 2 = long) */
673 16, /* bitsize */
674 FALSE, /* pc_relative */
675 0, /* bitpos */
676 complain_overflow_bitfield, /* complain_on_overflow */
677 bfd_elf_generic_reloc, /* special_function */
678 "R_PPC_PLT16_HI", /* name */
679 FALSE, /* partial_inplace */
680 0, /* src_mask */
681 0xffff, /* dst_mask */
682 FALSE), /* pcrel_offset */
683
684 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
685 the symbol. */
686 HOWTO (R_PPC_PLT16_HA, /* type */
687 16, /* rightshift */
688 1, /* size (0 = byte, 1 = short, 2 = long) */
689 16, /* bitsize */
690 FALSE, /* pc_relative */
691 0, /* bitpos */
692 complain_overflow_bitfield, /* complain_on_overflow */
693 ppc_elf_addr16_ha_reloc, /* special_function */
694 "R_PPC_PLT16_HA", /* name */
695 FALSE, /* partial_inplace */
696 0, /* src_mask */
697 0xffff, /* dst_mask */
698 FALSE), /* pcrel_offset */
699
700 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
701 small data items. */
702 HOWTO (R_PPC_SDAREL16, /* type */
703 0, /* rightshift */
704 1, /* size (0 = byte, 1 = short, 2 = long) */
705 16, /* bitsize */
706 FALSE, /* pc_relative */
707 0, /* bitpos */
708 complain_overflow_signed, /* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 "R_PPC_SDAREL16", /* name */
711 FALSE, /* partial_inplace */
712 0, /* src_mask */
713 0xffff, /* dst_mask */
714 FALSE), /* pcrel_offset */
715
716 /* 16-bit section relative relocation. */
717 HOWTO (R_PPC_SECTOFF, /* type */
718 0, /* rightshift */
719 1, /* size (0 = byte, 1 = short, 2 = long) */
720 16, /* bitsize */
721 FALSE, /* pc_relative */
722 0, /* bitpos */
723 complain_overflow_bitfield, /* complain_on_overflow */
724 bfd_elf_generic_reloc, /* special_function */
725 "R_PPC_SECTOFF", /* name */
726 FALSE, /* partial_inplace */
727 0, /* src_mask */
728 0xffff, /* dst_mask */
729 FALSE), /* pcrel_offset */
730
731 /* 16-bit lower half section relative relocation. */
732 HOWTO (R_PPC_SECTOFF_LO, /* type */
733 0, /* rightshift */
734 1, /* size (0 = byte, 1 = short, 2 = long) */
735 16, /* bitsize */
736 FALSE, /* pc_relative */
737 0, /* bitpos */
738 complain_overflow_dont, /* complain_on_overflow */
739 bfd_elf_generic_reloc, /* special_function */
740 "R_PPC_SECTOFF_LO", /* name */
741 FALSE, /* partial_inplace */
742 0, /* src_mask */
743 0xffff, /* dst_mask */
744 FALSE), /* pcrel_offset */
745
746 /* 16-bit upper half section relative relocation. */
747 HOWTO (R_PPC_SECTOFF_HI, /* type */
748 16, /* rightshift */
749 1, /* size (0 = byte, 1 = short, 2 = long) */
750 16, /* bitsize */
751 FALSE, /* pc_relative */
752 0, /* bitpos */
753 complain_overflow_bitfield, /* complain_on_overflow */
754 bfd_elf_generic_reloc, /* special_function */
755 "R_PPC_SECTOFF_HI", /* name */
756 FALSE, /* partial_inplace */
757 0, /* src_mask */
758 0xffff, /* dst_mask */
759 FALSE), /* pcrel_offset */
760
761 /* 16-bit upper half adjusted section relative relocation. */
762 HOWTO (R_PPC_SECTOFF_HA, /* type */
763 16, /* rightshift */
764 1, /* size (0 = byte, 1 = short, 2 = long) */
765 16, /* bitsize */
766 FALSE, /* pc_relative */
767 0, /* bitpos */
768 complain_overflow_bitfield, /* complain_on_overflow */
769 ppc_elf_addr16_ha_reloc, /* special_function */
770 "R_PPC_SECTOFF_HA", /* name */
771 FALSE, /* partial_inplace */
772 0, /* src_mask */
773 0xffff, /* dst_mask */
774 FALSE), /* pcrel_offset */
775
776 /* Marker relocs for TLS. */
777 HOWTO (R_PPC_TLS,
778 0, /* rightshift */
779 2, /* size (0 = byte, 1 = short, 2 = long) */
780 32, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_PPC_TLS", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 0, /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 HOWTO (R_PPC_TLSGD,
792 0, /* rightshift */
793 2, /* size (0 = byte, 1 = short, 2 = long) */
794 32, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_PPC_TLSGD", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 HOWTO (R_PPC_TLSLD,
806 0, /* rightshift */
807 2, /* size (0 = byte, 1 = short, 2 = long) */
808 32, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 bfd_elf_generic_reloc, /* special_function */
813 "R_PPC_TLSLD", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* Computes the load module index of the load module that contains the
820 definition of its TLS sym. */
821 HOWTO (R_PPC_DTPMOD32,
822 0, /* rightshift */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
824 32, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 ppc_elf_unhandled_reloc, /* special_function */
829 "R_PPC_DTPMOD32", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* Computes a dtv-relative displacement, the difference between the value
836 of sym+add and the base address of the thread-local storage block that
837 contains the definition of sym, minus 0x8000. */
838 HOWTO (R_PPC_DTPREL32,
839 0, /* rightshift */
840 2, /* size (0 = byte, 1 = short, 2 = long) */
841 32, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 ppc_elf_unhandled_reloc, /* special_function */
846 "R_PPC_DTPREL32", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffffffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* A 16 bit dtprel reloc. */
853 HOWTO (R_PPC_DTPREL16,
854 0, /* rightshift */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
856 16, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_signed, /* complain_on_overflow */
860 ppc_elf_unhandled_reloc, /* special_function */
861 "R_PPC_DTPREL16", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* Like DTPREL16, but no overflow. */
868 HOWTO (R_PPC_DTPREL16_LO,
869 0, /* rightshift */
870 1, /* size (0 = byte, 1 = short, 2 = long) */
871 16, /* bitsize */
872 FALSE, /* pc_relative */
873 0, /* bitpos */
874 complain_overflow_dont, /* complain_on_overflow */
875 ppc_elf_unhandled_reloc, /* special_function */
876 "R_PPC_DTPREL16_LO", /* name */
877 FALSE, /* partial_inplace */
878 0, /* src_mask */
879 0xffff, /* dst_mask */
880 FALSE), /* pcrel_offset */
881
882 /* Like DTPREL16_LO, but next higher group of 16 bits. */
883 HOWTO (R_PPC_DTPREL16_HI,
884 16, /* rightshift */
885 1, /* size (0 = byte, 1 = short, 2 = long) */
886 16, /* bitsize */
887 FALSE, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc_elf_unhandled_reloc, /* special_function */
891 "R_PPC_DTPREL16_HI", /* name */
892 FALSE, /* partial_inplace */
893 0, /* src_mask */
894 0xffff, /* dst_mask */
895 FALSE), /* pcrel_offset */
896
897 /* Like DTPREL16_HI, but adjust for low 16 bits. */
898 HOWTO (R_PPC_DTPREL16_HA,
899 16, /* rightshift */
900 1, /* size (0 = byte, 1 = short, 2 = long) */
901 16, /* bitsize */
902 FALSE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc_elf_unhandled_reloc, /* special_function */
906 "R_PPC_DTPREL16_HA", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 0xffff, /* dst_mask */
910 FALSE), /* pcrel_offset */
911
912 /* Computes a tp-relative displacement, the difference between the value of
913 sym+add and the value of the thread pointer (r13). */
914 HOWTO (R_PPC_TPREL32,
915 0, /* rightshift */
916 2, /* size (0 = byte, 1 = short, 2 = long) */
917 32, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont, /* complain_on_overflow */
921 ppc_elf_unhandled_reloc, /* special_function */
922 "R_PPC_TPREL32", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffffffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* A 16 bit tprel reloc. */
929 HOWTO (R_PPC_TPREL16,
930 0, /* rightshift */
931 1, /* size (0 = byte, 1 = short, 2 = long) */
932 16, /* bitsize */
933 FALSE, /* pc_relative */
934 0, /* bitpos */
935 complain_overflow_signed, /* complain_on_overflow */
936 ppc_elf_unhandled_reloc, /* special_function */
937 "R_PPC_TPREL16", /* name */
938 FALSE, /* partial_inplace */
939 0, /* src_mask */
940 0xffff, /* dst_mask */
941 FALSE), /* pcrel_offset */
942
943 /* Like TPREL16, but no overflow. */
944 HOWTO (R_PPC_TPREL16_LO,
945 0, /* rightshift */
946 1, /* size (0 = byte, 1 = short, 2 = long) */
947 16, /* bitsize */
948 FALSE, /* pc_relative */
949 0, /* bitpos */
950 complain_overflow_dont, /* complain_on_overflow */
951 ppc_elf_unhandled_reloc, /* special_function */
952 "R_PPC_TPREL16_LO", /* name */
953 FALSE, /* partial_inplace */
954 0, /* src_mask */
955 0xffff, /* dst_mask */
956 FALSE), /* pcrel_offset */
957
958 /* Like TPREL16_LO, but next higher group of 16 bits. */
959 HOWTO (R_PPC_TPREL16_HI,
960 16, /* rightshift */
961 1, /* size (0 = byte, 1 = short, 2 = long) */
962 16, /* bitsize */
963 FALSE, /* pc_relative */
964 0, /* bitpos */
965 complain_overflow_dont, /* complain_on_overflow */
966 ppc_elf_unhandled_reloc, /* special_function */
967 "R_PPC_TPREL16_HI", /* name */
968 FALSE, /* partial_inplace */
969 0, /* src_mask */
970 0xffff, /* dst_mask */
971 FALSE), /* pcrel_offset */
972
973 /* Like TPREL16_HI, but adjust for low 16 bits. */
974 HOWTO (R_PPC_TPREL16_HA,
975 16, /* rightshift */
976 1, /* size (0 = byte, 1 = short, 2 = long) */
977 16, /* bitsize */
978 FALSE, /* pc_relative */
979 0, /* bitpos */
980 complain_overflow_dont, /* complain_on_overflow */
981 ppc_elf_unhandled_reloc, /* special_function */
982 "R_PPC_TPREL16_HA", /* name */
983 FALSE, /* partial_inplace */
984 0, /* src_mask */
985 0xffff, /* dst_mask */
986 FALSE), /* pcrel_offset */
987
988 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
989 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
990 to the first entry. */
991 HOWTO (R_PPC_GOT_TLSGD16,
992 0, /* rightshift */
993 1, /* size (0 = byte, 1 = short, 2 = long) */
994 16, /* bitsize */
995 FALSE, /* pc_relative */
996 0, /* bitpos */
997 complain_overflow_signed, /* complain_on_overflow */
998 ppc_elf_unhandled_reloc, /* special_function */
999 "R_PPC_GOT_TLSGD16", /* name */
1000 FALSE, /* partial_inplace */
1001 0, /* src_mask */
1002 0xffff, /* dst_mask */
1003 FALSE), /* pcrel_offset */
1004
1005 /* Like GOT_TLSGD16, but no overflow. */
1006 HOWTO (R_PPC_GOT_TLSGD16_LO,
1007 0, /* rightshift */
1008 1, /* size (0 = byte, 1 = short, 2 = long) */
1009 16, /* bitsize */
1010 FALSE, /* pc_relative */
1011 0, /* bitpos */
1012 complain_overflow_dont, /* complain_on_overflow */
1013 ppc_elf_unhandled_reloc, /* special_function */
1014 "R_PPC_GOT_TLSGD16_LO", /* name */
1015 FALSE, /* partial_inplace */
1016 0, /* src_mask */
1017 0xffff, /* dst_mask */
1018 FALSE), /* pcrel_offset */
1019
1020 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1021 HOWTO (R_PPC_GOT_TLSGD16_HI,
1022 16, /* rightshift */
1023 1, /* size (0 = byte, 1 = short, 2 = long) */
1024 16, /* bitsize */
1025 FALSE, /* pc_relative */
1026 0, /* bitpos */
1027 complain_overflow_dont, /* complain_on_overflow */
1028 ppc_elf_unhandled_reloc, /* special_function */
1029 "R_PPC_GOT_TLSGD16_HI", /* name */
1030 FALSE, /* partial_inplace */
1031 0, /* src_mask */
1032 0xffff, /* dst_mask */
1033 FALSE), /* pcrel_offset */
1034
1035 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1036 HOWTO (R_PPC_GOT_TLSGD16_HA,
1037 16, /* rightshift */
1038 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 16, /* bitsize */
1040 FALSE, /* pc_relative */
1041 0, /* bitpos */
1042 complain_overflow_dont, /* complain_on_overflow */
1043 ppc_elf_unhandled_reloc, /* special_function */
1044 "R_PPC_GOT_TLSGD16_HA", /* name */
1045 FALSE, /* partial_inplace */
1046 0, /* src_mask */
1047 0xffff, /* dst_mask */
1048 FALSE), /* pcrel_offset */
1049
1050 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1051 with values (sym+add)@dtpmod and zero, and computes the offset to the
1052 first entry. */
1053 HOWTO (R_PPC_GOT_TLSLD16,
1054 0, /* rightshift */
1055 1, /* size (0 = byte, 1 = short, 2 = long) */
1056 16, /* bitsize */
1057 FALSE, /* pc_relative */
1058 0, /* bitpos */
1059 complain_overflow_signed, /* complain_on_overflow */
1060 ppc_elf_unhandled_reloc, /* special_function */
1061 "R_PPC_GOT_TLSLD16", /* name */
1062 FALSE, /* partial_inplace */
1063 0, /* src_mask */
1064 0xffff, /* dst_mask */
1065 FALSE), /* pcrel_offset */
1066
1067 /* Like GOT_TLSLD16, but no overflow. */
1068 HOWTO (R_PPC_GOT_TLSLD16_LO,
1069 0, /* rightshift */
1070 1, /* size (0 = byte, 1 = short, 2 = long) */
1071 16, /* bitsize */
1072 FALSE, /* pc_relative */
1073 0, /* bitpos */
1074 complain_overflow_dont, /* complain_on_overflow */
1075 ppc_elf_unhandled_reloc, /* special_function */
1076 "R_PPC_GOT_TLSLD16_LO", /* name */
1077 FALSE, /* partial_inplace */
1078 0, /* src_mask */
1079 0xffff, /* dst_mask */
1080 FALSE), /* pcrel_offset */
1081
1082 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1083 HOWTO (R_PPC_GOT_TLSLD16_HI,
1084 16, /* rightshift */
1085 1, /* size (0 = byte, 1 = short, 2 = long) */
1086 16, /* bitsize */
1087 FALSE, /* pc_relative */
1088 0, /* bitpos */
1089 complain_overflow_dont, /* complain_on_overflow */
1090 ppc_elf_unhandled_reloc, /* special_function */
1091 "R_PPC_GOT_TLSLD16_HI", /* name */
1092 FALSE, /* partial_inplace */
1093 0, /* src_mask */
1094 0xffff, /* dst_mask */
1095 FALSE), /* pcrel_offset */
1096
1097 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1098 HOWTO (R_PPC_GOT_TLSLD16_HA,
1099 16, /* rightshift */
1100 1, /* size (0 = byte, 1 = short, 2 = long) */
1101 16, /* bitsize */
1102 FALSE, /* pc_relative */
1103 0, /* bitpos */
1104 complain_overflow_dont, /* complain_on_overflow */
1105 ppc_elf_unhandled_reloc, /* special_function */
1106 "R_PPC_GOT_TLSLD16_HA", /* name */
1107 FALSE, /* partial_inplace */
1108 0, /* src_mask */
1109 0xffff, /* dst_mask */
1110 FALSE), /* pcrel_offset */
1111
1112 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1113 the offset to the entry. */
1114 HOWTO (R_PPC_GOT_DTPREL16,
1115 0, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc_elf_unhandled_reloc, /* special_function */
1122 "R_PPC_GOT_DTPREL16", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like GOT_DTPREL16, but no overflow. */
1129 HOWTO (R_PPC_GOT_DTPREL16_LO,
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc_elf_unhandled_reloc, /* special_function */
1137 "R_PPC_GOT_DTPREL16_LO", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xffff, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1144 HOWTO (R_PPC_GOT_DTPREL16_HI,
1145 16, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc_elf_unhandled_reloc, /* special_function */
1152 "R_PPC_GOT_DTPREL16_HI", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xffff, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1159 HOWTO (R_PPC_GOT_DTPREL16_HA,
1160 16, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_dont, /* complain_on_overflow */
1166 ppc_elf_unhandled_reloc, /* special_function */
1167 "R_PPC_GOT_DTPREL16_HA", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xffff, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1174 offset to the entry. */
1175 HOWTO (R_PPC_GOT_TPREL16,
1176 0, /* rightshift */
1177 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 16, /* bitsize */
1179 FALSE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_signed, /* complain_on_overflow */
1182 ppc_elf_unhandled_reloc, /* special_function */
1183 "R_PPC_GOT_TPREL16", /* name */
1184 FALSE, /* partial_inplace */
1185 0, /* src_mask */
1186 0xffff, /* dst_mask */
1187 FALSE), /* pcrel_offset */
1188
1189 /* Like GOT_TPREL16, but no overflow. */
1190 HOWTO (R_PPC_GOT_TPREL16_LO,
1191 0, /* rightshift */
1192 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 16, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_dont, /* complain_on_overflow */
1197 ppc_elf_unhandled_reloc, /* special_function */
1198 "R_PPC_GOT_TPREL16_LO", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1205 HOWTO (R_PPC_GOT_TPREL16_HI,
1206 16, /* rightshift */
1207 1, /* size (0 = byte, 1 = short, 2 = long) */
1208 16, /* bitsize */
1209 FALSE, /* pc_relative */
1210 0, /* bitpos */
1211 complain_overflow_dont, /* complain_on_overflow */
1212 ppc_elf_unhandled_reloc, /* special_function */
1213 "R_PPC_GOT_TPREL16_HI", /* name */
1214 FALSE, /* partial_inplace */
1215 0, /* src_mask */
1216 0xffff, /* dst_mask */
1217 FALSE), /* pcrel_offset */
1218
1219 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1220 HOWTO (R_PPC_GOT_TPREL16_HA,
1221 16, /* rightshift */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 FALSE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_dont, /* complain_on_overflow */
1227 ppc_elf_unhandled_reloc, /* special_function */
1228 "R_PPC_GOT_TPREL16_HA", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0xffff, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1233
1234 /* The remaining relocs are from the Embedded ELF ABI, and are not
1235 in the SVR4 ELF ABI. */
1236
1237 /* 32 bit value resulting from the addend minus the symbol. */
1238 HOWTO (R_PPC_EMB_NADDR32, /* type */
1239 0, /* rightshift */
1240 2, /* size (0 = byte, 1 = short, 2 = long) */
1241 32, /* bitsize */
1242 FALSE, /* pc_relative */
1243 0, /* bitpos */
1244 complain_overflow_bitfield, /* complain_on_overflow */
1245 bfd_elf_generic_reloc, /* special_function */
1246 "R_PPC_EMB_NADDR32", /* name */
1247 FALSE, /* partial_inplace */
1248 0, /* src_mask */
1249 0xffffffff, /* dst_mask */
1250 FALSE), /* pcrel_offset */
1251
1252 /* 16 bit value resulting from the addend minus the symbol. */
1253 HOWTO (R_PPC_EMB_NADDR16, /* type */
1254 0, /* rightshift */
1255 1, /* size (0 = byte, 1 = short, 2 = long) */
1256 16, /* bitsize */
1257 FALSE, /* pc_relative */
1258 0, /* bitpos */
1259 complain_overflow_bitfield, /* complain_on_overflow */
1260 bfd_elf_generic_reloc, /* special_function */
1261 "R_PPC_EMB_NADDR16", /* name */
1262 FALSE, /* partial_inplace */
1263 0, /* src_mask */
1264 0xffff, /* dst_mask */
1265 FALSE), /* pcrel_offset */
1266
1267 /* 16 bit value resulting from the addend minus the symbol. */
1268 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1269 0, /* rightshift */
1270 1, /* size (0 = byte, 1 = short, 2 = long) */
1271 16, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont,/* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC_EMB_ADDR16_LO", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0xffff, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* The high order 16 bits of the addend minus the symbol. */
1283 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1284 16, /* rightshift */
1285 1, /* size (0 = byte, 1 = short, 2 = long) */
1286 16, /* bitsize */
1287 FALSE, /* pc_relative */
1288 0, /* bitpos */
1289 complain_overflow_dont, /* complain_on_overflow */
1290 bfd_elf_generic_reloc, /* special_function */
1291 "R_PPC_EMB_NADDR16_HI", /* name */
1292 FALSE, /* partial_inplace */
1293 0, /* src_mask */
1294 0xffff, /* dst_mask */
1295 FALSE), /* pcrel_offset */
1296
1297 /* The high order 16 bits of the result of the addend minus the address,
1298 plus 1 if the contents of the low 16 bits, treated as a signed number,
1299 is negative. */
1300 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1301 16, /* rightshift */
1302 1, /* size (0 = byte, 1 = short, 2 = long) */
1303 16, /* bitsize */
1304 FALSE, /* pc_relative */
1305 0, /* bitpos */
1306 complain_overflow_dont, /* complain_on_overflow */
1307 ppc_elf_addr16_ha_reloc, /* special_function */
1308 "R_PPC_EMB_NADDR16_HA", /* name */
1309 FALSE, /* partial_inplace */
1310 0, /* src_mask */
1311 0xffff, /* dst_mask */
1312 FALSE), /* pcrel_offset */
1313
1314 /* 16 bit value resulting from allocating a 4 byte word to hold an
1315 address in the .sdata section, and returning the offset from
1316 _SDA_BASE_ for that relocation. */
1317 HOWTO (R_PPC_EMB_SDAI16, /* type */
1318 0, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_signed, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC_EMB_SDAI16", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* 16 bit value resulting from allocating a 4 byte word to hold an
1332 address in the .sdata2 section, and returning the offset from
1333 _SDA2_BASE_ for that relocation. */
1334 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1335 0, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_signed, /* complain_on_overflow */
1341 bfd_elf_generic_reloc, /* special_function */
1342 "R_PPC_EMB_SDA2I16", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1349 small data items. */
1350 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_signed, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_EMB_SDA2REL", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1365 signed offset from the appropriate base, and filling in the register
1366 field with the appropriate register (0, 2, or 13). */
1367 HOWTO (R_PPC_EMB_SDA21, /* type */
1368 0, /* rightshift */
1369 2, /* size (0 = byte, 1 = short, 2 = long) */
1370 16, /* bitsize */
1371 FALSE, /* pc_relative */
1372 0, /* bitpos */
1373 complain_overflow_signed, /* complain_on_overflow */
1374 bfd_elf_generic_reloc, /* special_function */
1375 "R_PPC_EMB_SDA21", /* name */
1376 FALSE, /* partial_inplace */
1377 0, /* src_mask */
1378 0xffff, /* dst_mask */
1379 FALSE), /* pcrel_offset */
1380
1381 /* Relocation not handled: R_PPC_EMB_MRKREF */
1382 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1383 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1384 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1385 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1386 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1387
1388 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1389 in the 16 bit signed offset from the appropriate base, and filling in the
1390 register field with the appropriate register (0, 2, or 13). */
1391 HOWTO (R_PPC_EMB_RELSDA, /* type */
1392 0, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_signed, /* complain_on_overflow */
1398 bfd_elf_generic_reloc, /* special_function */
1399 "R_PPC_EMB_RELSDA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* A relative 8 bit branch. */
1406 HOWTO (R_PPC_VLE_REL8, /* type */
1407 1, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 8, /* bitsize */
1410 TRUE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_signed, /* complain_on_overflow */
1413 bfd_elf_generic_reloc, /* special_function */
1414 "R_PPC_VLE_REL8", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xff, /* dst_mask */
1418 TRUE), /* pcrel_offset */
1419
1420 /* A relative 15 bit branch. */
1421 HOWTO (R_PPC_VLE_REL15, /* type */
1422 1, /* rightshift */
1423 2, /* size (0 = byte, 1 = short, 2 = long) */
1424 15, /* bitsize */
1425 TRUE, /* pc_relative */
1426 1, /* bitpos */
1427 complain_overflow_signed, /* complain_on_overflow */
1428 bfd_elf_generic_reloc, /* special_function */
1429 "R_PPC_VLE_REL15", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xfe, /* dst_mask */
1433 TRUE), /* pcrel_offset */
1434
1435 /* A relative 24 bit branch. */
1436 HOWTO (R_PPC_VLE_REL24, /* type */
1437 1, /* rightshift */
1438 2, /* size (0 = byte, 1 = short, 2 = long) */
1439 24, /* bitsize */
1440 TRUE, /* pc_relative */
1441 1, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 bfd_elf_generic_reloc, /* special_function */
1444 "R_PPC_VLE_REL24", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0x1fffffe, /* dst_mask */
1448 TRUE), /* pcrel_offset */
1449
1450 /* The 16 LSBS in split16a format. */
1451 HOWTO (R_PPC_VLE_LO16A, /* type */
1452 0, /* rightshift */
1453 2, /* size (0 = byte, 1 = short, 2 = long) */
1454 32, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_bitfield, /* complain_on_overflow */
1458 bfd_elf_generic_reloc, /* special_function */
1459 "R_PPC_VLE_LO16A", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0x1f007ff, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* The 16 LSBS in split16d format. */
1466 HOWTO (R_PPC_VLE_LO16D, /* type */
1467 0, /* rightshift */
1468 2, /* size (0 = byte, 1 = short, 2 = long) */
1469 32, /* bitsize */
1470 FALSE, /* pc_relative */
1471 0, /* bitpos */
1472 complain_overflow_bitfield, /* complain_on_overflow */
1473 bfd_elf_generic_reloc, /* special_function */
1474 "R_PPC_VLE_LO16D", /* name */
1475 FALSE, /* partial_inplace */
1476 0, /* src_mask */
1477 0x1f07ff, /* dst_mask */
1478 FALSE), /* pcrel_offset */
1479
1480 /* Bits 16-31 split16a format. */
1481 HOWTO (R_PPC_VLE_HI16A, /* type */
1482 0, /* rightshift */
1483 2, /* size (0 = byte, 1 = short, 2 = long) */
1484 32, /* bitsize */
1485 FALSE, /* pc_relative */
1486 0, /* bitpos */
1487 complain_overflow_bitfield, /* complain_on_overflow */
1488 bfd_elf_generic_reloc, /* special_function */
1489 "R_PPC_VLE_HI16A", /* name */
1490 FALSE, /* partial_inplace */
1491 0, /* src_mask */
1492 0x1f007ff, /* dst_mask */
1493 FALSE), /* pcrel_offset */
1494
1495 /* Bits 16-31 split16d format. */
1496 HOWTO (R_PPC_VLE_HI16D, /* type */
1497 0, /* rightshift */
1498 2, /* size (0 = byte, 1 = short, 2 = long) */
1499 32, /* bitsize */
1500 FALSE, /* pc_relative */
1501 0, /* bitpos */
1502 complain_overflow_bitfield, /* complain_on_overflow */
1503 bfd_elf_generic_reloc, /* special_function */
1504 "R_PPC_VLE_HI16D", /* name */
1505 FALSE, /* partial_inplace */
1506 0, /* src_mask */
1507 0x1f07ff, /* dst_mask */
1508 FALSE), /* pcrel_offset */
1509
1510 /* Bits 16-31 (High Adjusted) in split16a format. */
1511 HOWTO (R_PPC_VLE_HA16A, /* type */
1512 0, /* rightshift */
1513 2, /* size (0 = byte, 1 = short, 2 = long) */
1514 32, /* bitsize */
1515 FALSE, /* pc_relative */
1516 0, /* bitpos */
1517 complain_overflow_bitfield, /* complain_on_overflow */
1518 bfd_elf_generic_reloc, /* special_function */
1519 "R_PPC_VLE_HA16A", /* name */
1520 FALSE, /* partial_inplace */
1521 0, /* src_mask */
1522 0x1f007ff, /* dst_mask */
1523 FALSE), /* pcrel_offset */
1524
1525 /* Bits 16-31 (High Adjusted) in split16d format. */
1526 HOWTO (R_PPC_VLE_HA16D, /* type */
1527 0, /* rightshift */
1528 2, /* size (0 = byte, 1 = short, 2 = long) */
1529 32, /* bitsize */
1530 FALSE, /* pc_relative */
1531 0, /* bitpos */
1532 complain_overflow_bitfield, /* complain_on_overflow */
1533 bfd_elf_generic_reloc, /* special_function */
1534 "R_PPC_VLE_HA16D", /* name */
1535 FALSE, /* partial_inplace */
1536 0, /* src_mask */
1537 0x1f07ff, /* dst_mask */
1538 FALSE), /* pcrel_offset */
1539
1540 /* This reloc does nothing. */
1541 HOWTO (R_PPC_VLE_SDA21, /* type */
1542 0, /* rightshift */
1543 2, /* size (0 = byte, 1 = short, 2 = long) */
1544 32, /* bitsize */
1545 FALSE, /* pc_relative */
1546 0, /* bitpos */
1547 complain_overflow_bitfield, /* complain_on_overflow */
1548 bfd_elf_generic_reloc, /* special_function */
1549 "R_PPC_VLE_SDA21", /* name */
1550 FALSE, /* partial_inplace */
1551 0, /* src_mask */
1552 0xffff, /* dst_mask */
1553 FALSE), /* pcrel_offset */
1554
1555 /* This reloc does nothing. */
1556 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1557 0, /* rightshift */
1558 2, /* size (0 = byte, 1 = short, 2 = long) */
1559 32, /* bitsize */
1560 FALSE, /* pc_relative */
1561 0, /* bitpos */
1562 complain_overflow_bitfield, /* complain_on_overflow */
1563 bfd_elf_generic_reloc, /* special_function */
1564 "R_PPC_VLE_SDA21_LO", /* name */
1565 FALSE, /* partial_inplace */
1566 0, /* src_mask */
1567 0, /* dst_mask */
1568 FALSE), /* pcrel_offset */
1569
1570 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1571 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1572 0, /* rightshift */
1573 2, /* size (0 = byte, 1 = short, 2 = long) */
1574 32, /* bitsize */
1575 FALSE, /* pc_relative */
1576 0, /* bitpos */
1577 complain_overflow_bitfield, /* complain_on_overflow */
1578 bfd_elf_generic_reloc, /* special_function */
1579 "R_PPC_VLE_SDAREL_LO16A", /* name */
1580 FALSE, /* partial_inplace */
1581 0, /* src_mask */
1582 0x1f007ff, /* dst_mask */
1583 FALSE), /* pcrel_offset */
1584
1585 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1586 /* This reloc does nothing. */
1587 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1588 0, /* rightshift */
1589 2, /* size (0 = byte, 1 = short, 2 = long) */
1590 32, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_bitfield, /* complain_on_overflow */
1594 bfd_elf_generic_reloc, /* special_function */
1595 "R_PPC_VLE_SDAREL_LO16D", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0x1f07ff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1602 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1603 0, /* rightshift */
1604 2, /* size (0 = byte, 1 = short, 2 = long) */
1605 32, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_bitfield, /* complain_on_overflow */
1609 bfd_elf_generic_reloc, /* special_function */
1610 "R_PPC_VLE_SDAREL_HI16A", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0x1f007ff, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1617 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1618 0, /* rightshift */
1619 2, /* size (0 = byte, 1 = short, 2 = long) */
1620 32, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_bitfield, /* complain_on_overflow */
1624 bfd_elf_generic_reloc, /* special_function */
1625 "R_PPC_VLE_SDAREL_HI16D", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0x1f07ff, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1632 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1633 0, /* rightshift */
1634 2, /* size (0 = byte, 1 = short, 2 = long) */
1635 32, /* bitsize */
1636 FALSE, /* pc_relative */
1637 0, /* bitpos */
1638 complain_overflow_bitfield, /* complain_on_overflow */
1639 bfd_elf_generic_reloc, /* special_function */
1640 "R_PPC_VLE_SDAREL_HA16A", /* name */
1641 FALSE, /* partial_inplace */
1642 0, /* src_mask */
1643 0x1f007ff, /* dst_mask */
1644 FALSE), /* pcrel_offset */
1645
1646 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1647 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1648 0, /* rightshift */
1649 2, /* size (0 = byte, 1 = short, 2 = long) */
1650 32, /* bitsize */
1651 FALSE, /* pc_relative */
1652 0, /* bitpos */
1653 complain_overflow_bitfield, /* complain_on_overflow */
1654 bfd_elf_generic_reloc, /* special_function */
1655 "R_PPC_VLE_SDAREL_HA16D", /* name */
1656 FALSE, /* partial_inplace */
1657 0, /* src_mask */
1658 0x1f07ff, /* dst_mask */
1659 FALSE), /* pcrel_offset */
1660
1661 HOWTO (R_PPC_IRELATIVE, /* type */
1662 0, /* rightshift */
1663 2, /* size (0 = byte, 1 = short, 2 = long) */
1664 32, /* bitsize */
1665 FALSE, /* pc_relative */
1666 0, /* bitpos */
1667 complain_overflow_bitfield, /* complain_on_overflow */
1668 bfd_elf_generic_reloc, /* special_function */
1669 "R_PPC_IRELATIVE", /* name */
1670 FALSE, /* partial_inplace */
1671 0, /* src_mask */
1672 0xffffffff, /* dst_mask */
1673 FALSE), /* pcrel_offset */
1674
1675 /* A 16 bit relative relocation. */
1676 HOWTO (R_PPC_REL16, /* type */
1677 0, /* rightshift */
1678 1, /* size (0 = byte, 1 = short, 2 = long) */
1679 16, /* bitsize */
1680 TRUE, /* pc_relative */
1681 0, /* bitpos */
1682 complain_overflow_bitfield, /* complain_on_overflow */
1683 bfd_elf_generic_reloc, /* special_function */
1684 "R_PPC_REL16", /* name */
1685 FALSE, /* partial_inplace */
1686 0, /* src_mask */
1687 0xffff, /* dst_mask */
1688 TRUE), /* pcrel_offset */
1689
1690 /* A 16 bit relative relocation without overflow. */
1691 HOWTO (R_PPC_REL16_LO, /* type */
1692 0, /* rightshift */
1693 1, /* size (0 = byte, 1 = short, 2 = long) */
1694 16, /* bitsize */
1695 TRUE, /* pc_relative */
1696 0, /* bitpos */
1697 complain_overflow_dont,/* complain_on_overflow */
1698 bfd_elf_generic_reloc, /* special_function */
1699 "R_PPC_REL16_LO", /* name */
1700 FALSE, /* partial_inplace */
1701 0, /* src_mask */
1702 0xffff, /* dst_mask */
1703 TRUE), /* pcrel_offset */
1704
1705 /* The high order 16 bits of a relative address. */
1706 HOWTO (R_PPC_REL16_HI, /* type */
1707 16, /* rightshift */
1708 1, /* size (0 = byte, 1 = short, 2 = long) */
1709 16, /* bitsize */
1710 TRUE, /* pc_relative */
1711 0, /* bitpos */
1712 complain_overflow_dont, /* complain_on_overflow */
1713 bfd_elf_generic_reloc, /* special_function */
1714 "R_PPC_REL16_HI", /* name */
1715 FALSE, /* partial_inplace */
1716 0, /* src_mask */
1717 0xffff, /* dst_mask */
1718 TRUE), /* pcrel_offset */
1719
1720 /* The high order 16 bits of a relative address, plus 1 if the contents of
1721 the low 16 bits, treated as a signed number, is negative. */
1722 HOWTO (R_PPC_REL16_HA, /* type */
1723 16, /* rightshift */
1724 1, /* size (0 = byte, 1 = short, 2 = long) */
1725 16, /* bitsize */
1726 TRUE, /* pc_relative */
1727 0, /* bitpos */
1728 complain_overflow_dont, /* complain_on_overflow */
1729 ppc_elf_addr16_ha_reloc, /* special_function */
1730 "R_PPC_REL16_HA", /* name */
1731 FALSE, /* partial_inplace */
1732 0, /* src_mask */
1733 0xffff, /* dst_mask */
1734 TRUE), /* pcrel_offset */
1735
1736 /* GNU extension to record C++ vtable hierarchy. */
1737 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1738 0, /* rightshift */
1739 0, /* size (0 = byte, 1 = short, 2 = long) */
1740 0, /* bitsize */
1741 FALSE, /* pc_relative */
1742 0, /* bitpos */
1743 complain_overflow_dont, /* complain_on_overflow */
1744 NULL, /* special_function */
1745 "R_PPC_GNU_VTINHERIT", /* name */
1746 FALSE, /* partial_inplace */
1747 0, /* src_mask */
1748 0, /* dst_mask */
1749 FALSE), /* pcrel_offset */
1750
1751 /* GNU extension to record C++ vtable member usage. */
1752 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1753 0, /* rightshift */
1754 0, /* size (0 = byte, 1 = short, 2 = long) */
1755 0, /* bitsize */
1756 FALSE, /* pc_relative */
1757 0, /* bitpos */
1758 complain_overflow_dont, /* complain_on_overflow */
1759 NULL, /* special_function */
1760 "R_PPC_GNU_VTENTRY", /* name */
1761 FALSE, /* partial_inplace */
1762 0, /* src_mask */
1763 0, /* dst_mask */
1764 FALSE), /* pcrel_offset */
1765
1766 /* Phony reloc to handle AIX style TOC entries. */
1767 HOWTO (R_PPC_TOC16, /* type */
1768 0, /* rightshift */
1769 1, /* size (0 = byte, 1 = short, 2 = long) */
1770 16, /* bitsize */
1771 FALSE, /* pc_relative */
1772 0, /* bitpos */
1773 complain_overflow_signed, /* complain_on_overflow */
1774 bfd_elf_generic_reloc, /* special_function */
1775 "R_PPC_TOC16", /* name */
1776 FALSE, /* partial_inplace */
1777 0, /* src_mask */
1778 0xffff, /* dst_mask */
1779 FALSE), /* pcrel_offset */
1780 };
1781
1782 /* External 32-bit PPC structure for PRPSINFO. This structure is
1783 ABI-defined, thus we choose to use char arrays here in order to
1784 avoid dealing with different types in different architectures.
1785
1786 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1787 most non-PPC architectures use `short int'.
1788
1789 This structure will ultimately be written in the corefile's note
1790 section, as the PRPSINFO. */
1791
1792 struct elf_external_ppc_linux_prpsinfo32
1793 {
1794 char pr_state; /* Numeric process state. */
1795 char pr_sname; /* Char for pr_state. */
1796 char pr_zomb; /* Zombie. */
1797 char pr_nice; /* Nice val. */
1798 char pr_flag[4]; /* Flags. */
1799 char pr_uid[4];
1800 char pr_gid[4];
1801 char pr_pid[4];
1802 char pr_ppid[4];
1803 char pr_pgrp[4];
1804 char pr_sid[4];
1805 char pr_fname[16]; /* Filename of executable. */
1806 char pr_psargs[80]; /* Initial part of arg list. */
1807 };
1808
1809 /* Helper macro to swap (properly handling endianess) things from the
1810 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32'
1811 structure.
1812
1813 Note that FROM should be a pointer, and TO should be the explicit type. */
1814
1815 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \
1816 do \
1817 { \
1818 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \
1819 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \
1820 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \
1821 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \
1822 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \
1823 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \
1824 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \
1825 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \
1826 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \
1827 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \
1828 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \
1829 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \
1830 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \
1831 } while (0)
1832
1833 \f
1834 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1835
1836 static void
1837 ppc_elf_howto_init (void)
1838 {
1839 unsigned int i, type;
1840
1841 for (i = 0;
1842 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1843 i++)
1844 {
1845 type = ppc_elf_howto_raw[i].type;
1846 if (type >= (sizeof (ppc_elf_howto_table)
1847 / sizeof (ppc_elf_howto_table[0])))
1848 abort ();
1849 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1850 }
1851 }
1852
1853 static reloc_howto_type *
1854 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1855 bfd_reloc_code_real_type code)
1856 {
1857 enum elf_ppc_reloc_type r;
1858
1859 /* Initialize howto table if not already done. */
1860 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1861 ppc_elf_howto_init ();
1862
1863 switch (code)
1864 {
1865 default:
1866 return NULL;
1867
1868 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1869 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1870 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1871 case BFD_RELOC_PPC64_ADDR16_DS:
1872 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1873 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1874 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1875 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1876 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1877 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1878 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1879 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1880 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1881 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1882 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1883 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1884 case BFD_RELOC_PPC64_GOT16_DS:
1885 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1886 case BFD_RELOC_PPC64_GOT16_LO_DS:
1887 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1888 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1889 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1890 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1891 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1892 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1893 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1894 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1895 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1896 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1897 case BFD_RELOC_PPC64_PLT16_LO_DS:
1898 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1899 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1900 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1901 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1902 case BFD_RELOC_PPC64_SECTOFF_DS:
1903 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1904 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1905 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1906 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1907 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1908 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1909 case BFD_RELOC_PPC64_TOC16_DS:
1910 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1911 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1912 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1913 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1914 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1915 case BFD_RELOC_PPC64_TPREL16_DS:
1916 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1917 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1918 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1919 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1920 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1921 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1922 case BFD_RELOC_PPC64_DTPREL16_DS:
1923 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1924 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1925 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1926 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1927 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1928 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1929 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1930 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1931 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1932 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1933 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1934 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1935 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1936 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1937 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1938 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1939 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1940 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1941 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1942 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1943 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1944 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1945 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1946 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1947 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1948 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1949 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1950 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1951 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1952 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1953 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1954 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1955 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1956 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1957 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1958 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1959 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1960 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1961 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1962 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1963 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1964 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1965 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1966 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1967 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1968 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1969 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1970 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1971 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1972 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1973 r = R_PPC_VLE_SDAREL_LO16A;
1974 break;
1975 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1976 r = R_PPC_VLE_SDAREL_LO16D;
1977 break;
1978 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1979 r = R_PPC_VLE_SDAREL_HI16A;
1980 break;
1981 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1982 r = R_PPC_VLE_SDAREL_HI16D;
1983 break;
1984 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1985 r = R_PPC_VLE_SDAREL_HA16A;
1986 break;
1987 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1988 r = R_PPC_VLE_SDAREL_HA16D;
1989 break;
1990 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1991 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1992 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1993 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1994 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1995 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1996 }
1997
1998 return ppc_elf_howto_table[r];
1999 };
2000
2001 static reloc_howto_type *
2002 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2003 const char *r_name)
2004 {
2005 unsigned int i;
2006
2007 for (i = 0;
2008 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2009 i++)
2010 if (ppc_elf_howto_raw[i].name != NULL
2011 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2012 return &ppc_elf_howto_raw[i];
2013
2014 return NULL;
2015 }
2016
2017 /* Set the howto pointer for a PowerPC ELF reloc. */
2018
2019 static void
2020 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2021 arelent *cache_ptr,
2022 Elf_Internal_Rela *dst)
2023 {
2024 /* Initialize howto table if not already done. */
2025 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2026 ppc_elf_howto_init ();
2027
2028 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2029 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2030
2031 /* Just because the above assert didn't trigger doesn't mean that
2032 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2033 if (!cache_ptr->howto)
2034 {
2035 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2036 abfd, ELF32_R_TYPE (dst->r_info));
2037 bfd_set_error (bfd_error_bad_value);
2038
2039 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2040 }
2041 }
2042
2043 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2044
2045 static bfd_reloc_status_type
2046 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2047 arelent *reloc_entry,
2048 asymbol *symbol,
2049 void *data ATTRIBUTE_UNUSED,
2050 asection *input_section,
2051 bfd *output_bfd,
2052 char **error_message ATTRIBUTE_UNUSED)
2053 {
2054 bfd_vma relocation;
2055
2056 if (output_bfd != NULL)
2057 {
2058 reloc_entry->address += input_section->output_offset;
2059 return bfd_reloc_ok;
2060 }
2061
2062 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2063 return bfd_reloc_outofrange;
2064
2065 if (bfd_is_com_section (symbol->section))
2066 relocation = 0;
2067 else
2068 relocation = symbol->value;
2069
2070 relocation += symbol->section->output_section->vma;
2071 relocation += symbol->section->output_offset;
2072 relocation += reloc_entry->addend;
2073 if (reloc_entry->howto->pc_relative)
2074 relocation -= reloc_entry->address;
2075
2076 reloc_entry->addend += (relocation & 0x8000) << 1;
2077
2078 return bfd_reloc_continue;
2079 }
2080
2081 static bfd_reloc_status_type
2082 ppc_elf_unhandled_reloc (bfd *abfd,
2083 arelent *reloc_entry,
2084 asymbol *symbol,
2085 void *data,
2086 asection *input_section,
2087 bfd *output_bfd,
2088 char **error_message)
2089 {
2090 /* If this is a relocatable link (output_bfd test tells us), just
2091 call the generic function. Any adjustment will be done at final
2092 link time. */
2093 if (output_bfd != NULL)
2094 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2095 input_section, output_bfd, error_message);
2096
2097 if (error_message != NULL)
2098 {
2099 static char buf[60];
2100 sprintf (buf, _("generic linker can't handle %s"),
2101 reloc_entry->howto->name);
2102 *error_message = buf;
2103 }
2104 return bfd_reloc_dangerous;
2105 }
2106 \f
2107 /* Sections created by the linker. */
2108
2109 typedef struct elf_linker_section
2110 {
2111 /* Pointer to the bfd section. */
2112 asection *section;
2113 /* Section name. */
2114 const char *name;
2115 /* Associated bss section name. */
2116 const char *bss_name;
2117 /* Associated symbol name. */
2118 const char *sym_name;
2119 /* Associated symbol. */
2120 struct elf_link_hash_entry *sym;
2121 } elf_linker_section_t;
2122
2123 /* Linked list of allocated pointer entries. This hangs off of the
2124 symbol lists, and provides allows us to return different pointers,
2125 based on different addend's. */
2126
2127 typedef struct elf_linker_section_pointers
2128 {
2129 /* next allocated pointer for this symbol */
2130 struct elf_linker_section_pointers *next;
2131 /* offset of pointer from beginning of section */
2132 bfd_vma offset;
2133 /* addend used */
2134 bfd_vma addend;
2135 /* which linker section this is */
2136 elf_linker_section_t *lsect;
2137 } elf_linker_section_pointers_t;
2138
2139 struct ppc_elf_obj_tdata
2140 {
2141 struct elf_obj_tdata elf;
2142
2143 /* A mapping from local symbols to offsets into the various linker
2144 sections added. This is index by the symbol index. */
2145 elf_linker_section_pointers_t **linker_section_pointers;
2146
2147 /* Flags used to auto-detect plt type. */
2148 unsigned int makes_plt_call : 1;
2149 unsigned int has_rel16 : 1;
2150 };
2151
2152 #define ppc_elf_tdata(bfd) \
2153 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2154
2155 #define elf_local_ptr_offsets(bfd) \
2156 (ppc_elf_tdata (bfd)->linker_section_pointers)
2157
2158 #define is_ppc_elf(bfd) \
2159 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2160 && elf_object_id (bfd) == PPC32_ELF_DATA)
2161
2162 /* Override the generic function because we store some extras. */
2163
2164 static bfd_boolean
2165 ppc_elf_mkobject (bfd *abfd)
2166 {
2167 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2168 PPC32_ELF_DATA);
2169 }
2170
2171 /* Fix bad default arch selected for a 32 bit input bfd when the
2172 default is 64 bit. */
2173
2174 static bfd_boolean
2175 ppc_elf_object_p (bfd *abfd)
2176 {
2177 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2178 {
2179 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2180
2181 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2182 {
2183 /* Relies on arch after 64 bit default being 32 bit default. */
2184 abfd->arch_info = abfd->arch_info->next;
2185 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2186 }
2187 }
2188 return TRUE;
2189 }
2190
2191 /* Function to set whether a module needs the -mrelocatable bit set. */
2192
2193 static bfd_boolean
2194 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2195 {
2196 BFD_ASSERT (!elf_flags_init (abfd)
2197 || elf_elfheader (abfd)->e_flags == flags);
2198
2199 elf_elfheader (abfd)->e_flags = flags;
2200 elf_flags_init (abfd) = TRUE;
2201 return TRUE;
2202 }
2203
2204 /* Support for core dump NOTE sections. */
2205
2206 static bfd_boolean
2207 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2208 {
2209 int offset;
2210 unsigned int size;
2211
2212 switch (note->descsz)
2213 {
2214 default:
2215 return FALSE;
2216
2217 case 268: /* Linux/PPC. */
2218 /* pr_cursig */
2219 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2220
2221 /* pr_pid */
2222 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2223
2224 /* pr_reg */
2225 offset = 72;
2226 size = 192;
2227
2228 break;
2229 }
2230
2231 /* Make a ".reg/999" section. */
2232 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2233 size, note->descpos + offset);
2234 }
2235
2236 static bfd_boolean
2237 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2238 {
2239 switch (note->descsz)
2240 {
2241 default:
2242 return FALSE;
2243
2244 case 128: /* Linux/PPC elf_prpsinfo. */
2245 elf_tdata (abfd)->core->pid
2246 = bfd_get_32 (abfd, note->descdata + 16);
2247 elf_tdata (abfd)->core->program
2248 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2249 elf_tdata (abfd)->core->command
2250 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2251 }
2252
2253 /* Note that for some reason, a spurious space is tacked
2254 onto the end of the args in some (at least one anyway)
2255 implementations, so strip it off if it exists. */
2256
2257 {
2258 char *command = elf_tdata (abfd)->core->command;
2259 int n = strlen (command);
2260
2261 if (0 < n && command[n - 1] == ' ')
2262 command[n - 1] = '\0';
2263 }
2264
2265 return TRUE;
2266 }
2267
2268 char *
2269 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2270 const struct elf_internal_linux_prpsinfo *prpsinfo)
2271 {
2272 struct elf_external_ppc_linux_prpsinfo32 data;
2273
2274 memset (&data, 0, sizeof (data));
2275 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2276
2277 return elfcore_write_note (abfd, buf, bufsiz,
2278 "CORE", NT_PRPSINFO, &data, sizeof (data));
2279 }
2280
2281 static char *
2282 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2283 {
2284 switch (note_type)
2285 {
2286 default:
2287 return NULL;
2288
2289 case NT_PRPSINFO:
2290 {
2291 char data[128];
2292 va_list ap;
2293
2294 va_start (ap, note_type);
2295 memset (data, 0, sizeof (data));
2296 strncpy (data + 32, va_arg (ap, const char *), 16);
2297 strncpy (data + 48, va_arg (ap, const char *), 80);
2298 va_end (ap);
2299 return elfcore_write_note (abfd, buf, bufsiz,
2300 "CORE", note_type, data, sizeof (data));
2301 }
2302
2303 case NT_PRSTATUS:
2304 {
2305 char data[268];
2306 va_list ap;
2307 long pid;
2308 int cursig;
2309 const void *greg;
2310
2311 va_start (ap, note_type);
2312 memset (data, 0, 72);
2313 pid = va_arg (ap, long);
2314 bfd_put_32 (abfd, pid, data + 24);
2315 cursig = va_arg (ap, int);
2316 bfd_put_16 (abfd, cursig, data + 12);
2317 greg = va_arg (ap, const void *);
2318 memcpy (data + 72, greg, 192);
2319 memset (data + 264, 0, 4);
2320 va_end (ap);
2321 return elfcore_write_note (abfd, buf, bufsiz,
2322 "CORE", note_type, data, sizeof (data));
2323 }
2324 }
2325 }
2326
2327 static flagword
2328 ppc_elf_lookup_section_flags (char *flag_name)
2329 {
2330
2331 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2332 return SHF_PPC_VLE;
2333
2334 return 0;
2335 }
2336
2337 /* Add the VLE flag if required. */
2338
2339 bfd_boolean
2340 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2341 {
2342 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2343 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2344 shdr->sh_flags |= SHF_PPC_VLE;
2345
2346 return TRUE;
2347 }
2348
2349 /* Return address for Ith PLT stub in section PLT, for relocation REL
2350 or (bfd_vma) -1 if it should not be included. */
2351
2352 static bfd_vma
2353 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2354 const asection *plt ATTRIBUTE_UNUSED,
2355 const arelent *rel)
2356 {
2357 return rel->address;
2358 }
2359
2360 /* Handle a PowerPC specific section when reading an object file. This
2361 is called when bfd_section_from_shdr finds a section with an unknown
2362 type. */
2363
2364 static bfd_boolean
2365 ppc_elf_section_from_shdr (bfd *abfd,
2366 Elf_Internal_Shdr *hdr,
2367 const char *name,
2368 int shindex)
2369 {
2370 asection *newsect;
2371 flagword flags;
2372
2373 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2374 return FALSE;
2375
2376 newsect = hdr->bfd_section;
2377 flags = bfd_get_section_flags (abfd, newsect);
2378 if (hdr->sh_flags & SHF_EXCLUDE)
2379 flags |= SEC_EXCLUDE;
2380
2381 if (hdr->sh_type == SHT_ORDERED)
2382 flags |= SEC_SORT_ENTRIES;
2383
2384 bfd_set_section_flags (abfd, newsect, flags);
2385 return TRUE;
2386 }
2387
2388 /* Set up any other section flags and such that may be necessary. */
2389
2390 static bfd_boolean
2391 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2392 Elf_Internal_Shdr *shdr,
2393 asection *asect)
2394 {
2395 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2396 shdr->sh_type = SHT_ORDERED;
2397
2398 return TRUE;
2399 }
2400
2401 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2402 need to bump up the number of section headers. */
2403
2404 static int
2405 ppc_elf_additional_program_headers (bfd *abfd,
2406 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2407 {
2408 asection *s;
2409 int ret = 0;
2410
2411 s = bfd_get_section_by_name (abfd, ".sbss2");
2412 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2413 ++ret;
2414
2415 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2416 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2417 ++ret;
2418
2419 return ret;
2420 }
2421
2422 /* Modify the segment map for VLE executables. */
2423
2424 bfd_boolean
2425 ppc_elf_modify_segment_map (bfd *abfd,
2426 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2427 {
2428 struct elf_segment_map *m, *n;
2429 bfd_size_type amt;
2430 unsigned int j, k;
2431 bfd_boolean sect0_vle, sectj_vle;
2432
2433 /* At this point in the link, output sections have already been sorted by
2434 LMA and assigned to segments. All that is left to do is to ensure
2435 there is no mixing of VLE & non-VLE sections in a text segment.
2436 If we find that case, we split the segment.
2437 We maintain the original output section order. */
2438
2439 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2440 {
2441 if (m->count == 0)
2442 continue;
2443
2444 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2445 for (j = 1; j < m->count; ++j)
2446 {
2447 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2448
2449 if (sectj_vle != sect0_vle)
2450 break;
2451 }
2452 if (j >= m->count)
2453 continue;
2454
2455 /* sections 0..j-1 stay in this (current) segment,
2456 the remainder are put in a new segment.
2457 The scan resumes with the new segment. */
2458
2459 /* Fix the new segment. */
2460 amt = sizeof (struct elf_segment_map);
2461 amt += (m->count - j - 1) * sizeof (asection *);
2462 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2463 if (n == NULL)
2464 return FALSE;
2465
2466 n->p_type = PT_LOAD;
2467 n->p_flags = PF_X | PF_R;
2468 if (sectj_vle)
2469 n->p_flags |= PF_PPC_VLE;
2470 n->count = m->count - j;
2471 for (k = 0; k < n->count; ++k)
2472 {
2473 n->sections[k] = m->sections[j+k];
2474 m->sections[j+k] = NULL;
2475 }
2476 n->next = m->next;
2477 m->next = n;
2478
2479 /* Fix the current segment */
2480 m->count = j;
2481 }
2482
2483 return TRUE;
2484 }
2485
2486 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2487 .PPC.EMB.sbss0 a normal section, and not a bss section so
2488 that the linker doesn't crater when trying to make more than
2489 2 sections. */
2490
2491 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2492 {
2493 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2494 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2495 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2496 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2497 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2498 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2499 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2500 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2501 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2502 { NULL, 0, 0, 0, 0 }
2503 };
2504
2505 /* This is what we want for new plt/got. */
2506 static struct bfd_elf_special_section ppc_alt_plt =
2507 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2508
2509 static const struct bfd_elf_special_section *
2510 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2511 {
2512 const struct bfd_elf_special_section *ssect;
2513
2514 /* See if this is one of the special sections. */
2515 if (sec->name == NULL)
2516 return NULL;
2517
2518 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2519 sec->use_rela_p);
2520 if (ssect != NULL)
2521 {
2522 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2523 ssect = &ppc_alt_plt;
2524 return ssect;
2525 }
2526
2527 return _bfd_elf_get_sec_type_attr (abfd, sec);
2528 }
2529 \f
2530 /* Very simple linked list structure for recording apuinfo values. */
2531 typedef struct apuinfo_list
2532 {
2533 struct apuinfo_list *next;
2534 unsigned long value;
2535 }
2536 apuinfo_list;
2537
2538 static apuinfo_list *head;
2539 static bfd_boolean apuinfo_set;
2540
2541 static void
2542 apuinfo_list_init (void)
2543 {
2544 head = NULL;
2545 apuinfo_set = FALSE;
2546 }
2547
2548 static void
2549 apuinfo_list_add (unsigned long value)
2550 {
2551 apuinfo_list *entry = head;
2552
2553 while (entry != NULL)
2554 {
2555 if (entry->value == value)
2556 return;
2557 entry = entry->next;
2558 }
2559
2560 entry = bfd_malloc (sizeof (* entry));
2561 if (entry == NULL)
2562 return;
2563
2564 entry->value = value;
2565 entry->next = head;
2566 head = entry;
2567 }
2568
2569 static unsigned
2570 apuinfo_list_length (void)
2571 {
2572 apuinfo_list *entry;
2573 unsigned long count;
2574
2575 for (entry = head, count = 0;
2576 entry;
2577 entry = entry->next)
2578 ++ count;
2579
2580 return count;
2581 }
2582
2583 static inline unsigned long
2584 apuinfo_list_element (unsigned long number)
2585 {
2586 apuinfo_list * entry;
2587
2588 for (entry = head;
2589 entry && number --;
2590 entry = entry->next)
2591 ;
2592
2593 return entry ? entry->value : 0;
2594 }
2595
2596 static void
2597 apuinfo_list_finish (void)
2598 {
2599 apuinfo_list *entry;
2600
2601 for (entry = head; entry;)
2602 {
2603 apuinfo_list *next = entry->next;
2604 free (entry);
2605 entry = next;
2606 }
2607
2608 head = NULL;
2609 }
2610
2611 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2612 #define APUINFO_LABEL "APUinfo"
2613
2614 /* Scan the input BFDs and create a linked list of
2615 the APUinfo values that will need to be emitted. */
2616
2617 static void
2618 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2619 {
2620 bfd *ibfd;
2621 asection *asec;
2622 char *buffer = NULL;
2623 bfd_size_type largest_input_size = 0;
2624 unsigned i;
2625 unsigned long length;
2626 const char *error_message = NULL;
2627
2628 if (link_info == NULL)
2629 return;
2630
2631 apuinfo_list_init ();
2632
2633 /* Read in the input sections contents. */
2634 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2635 {
2636 unsigned long datum;
2637
2638 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2639 if (asec == NULL)
2640 continue;
2641
2642 error_message = _("corrupt %s section in %B");
2643 length = asec->size;
2644 if (length < 20)
2645 goto fail;
2646
2647 apuinfo_set = TRUE;
2648 if (largest_input_size < asec->size)
2649 {
2650 if (buffer)
2651 free (buffer);
2652 largest_input_size = asec->size;
2653 buffer = bfd_malloc (largest_input_size);
2654 if (!buffer)
2655 return;
2656 }
2657
2658 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2659 || (bfd_bread (buffer, length, ibfd) != length))
2660 {
2661 error_message = _("unable to read in %s section from %B");
2662 goto fail;
2663 }
2664
2665 /* Verify the contents of the header. Note - we have to
2666 extract the values this way in order to allow for a
2667 host whose endian-ness is different from the target. */
2668 datum = bfd_get_32 (ibfd, buffer);
2669 if (datum != sizeof APUINFO_LABEL)
2670 goto fail;
2671
2672 datum = bfd_get_32 (ibfd, buffer + 8);
2673 if (datum != 0x2)
2674 goto fail;
2675
2676 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2677 goto fail;
2678
2679 /* Get the number of bytes used for apuinfo entries. */
2680 datum = bfd_get_32 (ibfd, buffer + 4);
2681 if (datum + 20 != length)
2682 goto fail;
2683
2684 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2685 for (i = 0; i < datum; i += 4)
2686 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2687 }
2688
2689 error_message = NULL;
2690
2691 if (apuinfo_set)
2692 {
2693 /* Compute the size of the output section. */
2694 unsigned num_entries = apuinfo_list_length ();
2695
2696 /* Set the output section size, if it exists. */
2697 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2698
2699 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2700 {
2701 ibfd = abfd;
2702 error_message = _("warning: unable to set size of %s section in %B");
2703 }
2704 }
2705
2706 fail:
2707 if (buffer)
2708 free (buffer);
2709
2710 if (error_message)
2711 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2712 }
2713
2714 /* Prevent the output section from accumulating the input sections'
2715 contents. We have already stored this in our linked list structure. */
2716
2717 static bfd_boolean
2718 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2719 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2720 asection *asec,
2721 bfd_byte *contents ATTRIBUTE_UNUSED)
2722 {
2723 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2724 }
2725
2726 /* Finally we can generate the output section. */
2727
2728 static void
2729 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2730 {
2731 bfd_byte *buffer;
2732 asection *asec;
2733 unsigned i;
2734 unsigned num_entries;
2735 bfd_size_type length;
2736
2737 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2738 if (asec == NULL)
2739 return;
2740
2741 if (!apuinfo_set)
2742 return;
2743
2744 length = asec->size;
2745 if (length < 20)
2746 return;
2747
2748 buffer = bfd_malloc (length);
2749 if (buffer == NULL)
2750 {
2751 (*_bfd_error_handler)
2752 (_("failed to allocate space for new APUinfo section."));
2753 return;
2754 }
2755
2756 /* Create the apuinfo header. */
2757 num_entries = apuinfo_list_length ();
2758 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2759 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2760 bfd_put_32 (abfd, 0x2, buffer + 8);
2761 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2762
2763 length = 20;
2764 for (i = 0; i < num_entries; i++)
2765 {
2766 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2767 length += 4;
2768 }
2769
2770 if (length != asec->size)
2771 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2772
2773 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2774 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2775
2776 free (buffer);
2777
2778 apuinfo_list_finish ();
2779 }
2780 \f
2781 static bfd_boolean
2782 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2783 {
2784 bfd_byte buf[GLINK_ENTRY_SIZE];
2785
2786 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2787 return FALSE;
2788
2789 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2790 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2791 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2792 && bfd_get_32 (abfd, buf + 12) == BCTR);
2793 }
2794
2795 static bfd_boolean
2796 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2797 {
2798 bfd_vma vma = *(bfd_vma *) ptr;
2799 return ((section->flags & SEC_ALLOC) != 0
2800 && section->vma <= vma
2801 && vma < section->vma + section->size);
2802 }
2803
2804 static long
2805 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2806 long dynsymcount, asymbol **dynsyms,
2807 asymbol **ret)
2808 {
2809 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2810 asection *plt, *relplt, *dynamic, *glink;
2811 bfd_vma glink_vma = 0;
2812 bfd_vma resolv_vma = 0;
2813 bfd_vma stub_vma;
2814 asymbol *s;
2815 arelent *p;
2816 long count, i;
2817 size_t size;
2818 char *names;
2819 bfd_byte buf[4];
2820
2821 *ret = NULL;
2822
2823 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2824 return 0;
2825
2826 if (dynsymcount <= 0)
2827 return 0;
2828
2829 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2830 if (relplt == NULL)
2831 return 0;
2832
2833 plt = bfd_get_section_by_name (abfd, ".plt");
2834 if (plt == NULL)
2835 return 0;
2836
2837 /* Call common code to handle old-style executable PLTs. */
2838 if (elf_section_flags (plt) & SHF_EXECINSTR)
2839 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2840 dynsymcount, dynsyms, ret);
2841
2842 /* If this object was prelinked, the prelinker stored the address
2843 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2844 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2845 if (dynamic != NULL)
2846 {
2847 bfd_byte *dynbuf, *extdyn, *extdynend;
2848 size_t extdynsize;
2849 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2850
2851 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2852 return -1;
2853
2854 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2855 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2856
2857 extdyn = dynbuf;
2858 extdynend = extdyn + dynamic->size;
2859 for (; extdyn < extdynend; extdyn += extdynsize)
2860 {
2861 Elf_Internal_Dyn dyn;
2862 (*swap_dyn_in) (abfd, extdyn, &dyn);
2863
2864 if (dyn.d_tag == DT_NULL)
2865 break;
2866
2867 if (dyn.d_tag == DT_PPC_GOT)
2868 {
2869 unsigned int g_o_t = dyn.d_un.d_val;
2870 asection *got = bfd_get_section_by_name (abfd, ".got");
2871 if (got != NULL
2872 && bfd_get_section_contents (abfd, got, buf,
2873 g_o_t - got->vma + 4, 4))
2874 glink_vma = bfd_get_32 (abfd, buf);
2875 break;
2876 }
2877 }
2878 free (dynbuf);
2879 }
2880
2881 /* Otherwise we read the first plt entry. */
2882 if (glink_vma == 0)
2883 {
2884 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2885 glink_vma = bfd_get_32 (abfd, buf);
2886 }
2887
2888 if (glink_vma == 0)
2889 return 0;
2890
2891 /* The .glink section usually does not survive the final
2892 link; search for the section (usually .text) where the
2893 glink stubs now reside. */
2894 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2895 if (glink == NULL)
2896 return 0;
2897
2898 /* Determine glink PLT resolver by reading the relative branch
2899 from the first glink stub. */
2900 if (bfd_get_section_contents (abfd, glink, buf,
2901 glink_vma - glink->vma, 4))
2902 {
2903 unsigned int insn = bfd_get_32 (abfd, buf);
2904
2905 /* The first glink stub may either branch to the resolver ... */
2906 insn ^= B;
2907 if ((insn & ~0x3fffffc) == 0)
2908 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2909
2910 /* ... or fall through a bunch of NOPs. */
2911 else if ((insn ^ B ^ NOP) == 0)
2912 for (i = 4;
2913 bfd_get_section_contents (abfd, glink, buf,
2914 glink_vma - glink->vma + i, 4);
2915 i += 4)
2916 if (bfd_get_32 (abfd, buf) != NOP)
2917 {
2918 resolv_vma = glink_vma + i;
2919 break;
2920 }
2921 }
2922
2923 count = relplt->size / sizeof (Elf32_External_Rela);
2924 stub_vma = glink_vma - (bfd_vma) count * 16;
2925 /* If the stubs are those for -shared/-pie then we might have
2926 multiple stubs for each plt entry. If that is the case then
2927 there is no way to associate stubs with their plt entries short
2928 of figuring out the GOT pointer value used in the stub. */
2929 if (!is_nonpic_glink_stub (abfd, glink,
2930 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2931 return 0;
2932
2933 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2934 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2935 return -1;
2936
2937 size = count * sizeof (asymbol);
2938 p = relplt->relocation;
2939 for (i = 0; i < count; i++, p++)
2940 {
2941 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2942 if (p->addend != 0)
2943 size += sizeof ("+0x") - 1 + 8;
2944 }
2945
2946 size += sizeof (asymbol) + sizeof ("__glink");
2947
2948 if (resolv_vma)
2949 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2950
2951 s = *ret = bfd_malloc (size);
2952 if (s == NULL)
2953 return -1;
2954
2955 names = (char *) (s + count + 1 + (resolv_vma != 0));
2956 p = relplt->relocation;
2957 for (i = 0; i < count; i++, p++)
2958 {
2959 size_t len;
2960
2961 *s = **p->sym_ptr_ptr;
2962 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2963 we are defining a symbol, ensure one of them is set. */
2964 if ((s->flags & BSF_LOCAL) == 0)
2965 s->flags |= BSF_GLOBAL;
2966 s->flags |= BSF_SYNTHETIC;
2967 s->section = glink;
2968 s->value = stub_vma - glink->vma;
2969 s->name = names;
2970 s->udata.p = NULL;
2971 len = strlen ((*p->sym_ptr_ptr)->name);
2972 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2973 names += len;
2974 if (p->addend != 0)
2975 {
2976 memcpy (names, "+0x", sizeof ("+0x") - 1);
2977 names += sizeof ("+0x") - 1;
2978 bfd_sprintf_vma (abfd, names, p->addend);
2979 names += strlen (names);
2980 }
2981 memcpy (names, "@plt", sizeof ("@plt"));
2982 names += sizeof ("@plt");
2983 ++s;
2984 stub_vma += 16;
2985 }
2986
2987 /* Add a symbol at the start of the glink branch table. */
2988 memset (s, 0, sizeof *s);
2989 s->the_bfd = abfd;
2990 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2991 s->section = glink;
2992 s->value = glink_vma - glink->vma;
2993 s->name = names;
2994 memcpy (names, "__glink", sizeof ("__glink"));
2995 names += sizeof ("__glink");
2996 s++;
2997 count++;
2998
2999 if (resolv_vma)
3000 {
3001 /* Add a symbol for the glink PLT resolver. */
3002 memset (s, 0, sizeof *s);
3003 s->the_bfd = abfd;
3004 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3005 s->section = glink;
3006 s->value = resolv_vma - glink->vma;
3007 s->name = names;
3008 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3009 names += sizeof ("__glink_PLTresolve");
3010 s++;
3011 count++;
3012 }
3013
3014 return count;
3015 }
3016 \f
3017 /* The following functions are specific to the ELF linker, while
3018 functions above are used generally. They appear in this file more
3019 or less in the order in which they are called. eg.
3020 ppc_elf_check_relocs is called early in the link process,
3021 ppc_elf_finish_dynamic_sections is one of the last functions
3022 called. */
3023
3024 /* Track PLT entries needed for a given symbol. We might need more
3025 than one glink entry per symbol when generating a pic binary. */
3026 struct plt_entry
3027 {
3028 struct plt_entry *next;
3029
3030 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3031 This field stores the offset into .got2 used to initialise the
3032 GOT pointer reg. It will always be at least 32768. (Current
3033 gcc always uses an offset of 32768, but ld -r will pack .got2
3034 sections together resulting in larger offsets). */
3035 bfd_vma addend;
3036
3037 /* The .got2 section. */
3038 asection *sec;
3039
3040 /* PLT refcount or offset. */
3041 union
3042 {
3043 bfd_signed_vma refcount;
3044 bfd_vma offset;
3045 } plt;
3046
3047 /* .glink stub offset. */
3048 bfd_vma glink_offset;
3049 };
3050
3051 /* Of those relocs that might be copied as dynamic relocs, this function
3052 selects those that must be copied when linking a shared library,
3053 even when the symbol is local. */
3054
3055 static int
3056 must_be_dyn_reloc (struct bfd_link_info *info,
3057 enum elf_ppc_reloc_type r_type)
3058 {
3059 switch (r_type)
3060 {
3061 default:
3062 return 1;
3063
3064 case R_PPC_REL24:
3065 case R_PPC_REL14:
3066 case R_PPC_REL14_BRTAKEN:
3067 case R_PPC_REL14_BRNTAKEN:
3068 case R_PPC_REL32:
3069 return 0;
3070
3071 case R_PPC_TPREL32:
3072 case R_PPC_TPREL16:
3073 case R_PPC_TPREL16_LO:
3074 case R_PPC_TPREL16_HI:
3075 case R_PPC_TPREL16_HA:
3076 return !info->executable;
3077 }
3078 }
3079
3080 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3081 copying dynamic variables from a shared lib into an app's dynbss
3082 section, and instead use a dynamic relocation to point into the
3083 shared lib. */
3084 #define ELIMINATE_COPY_RELOCS 1
3085
3086 /* Used to track dynamic relocations for local symbols. */
3087 struct ppc_dyn_relocs
3088 {
3089 struct ppc_dyn_relocs *next;
3090
3091 /* The input section of the reloc. */
3092 asection *sec;
3093
3094 /* Total number of relocs copied for the input section. */
3095 unsigned int count : 31;
3096
3097 /* Whether this entry is for STT_GNU_IFUNC symbols. */
3098 unsigned int ifunc : 1;
3099 };
3100
3101 /* PPC ELF linker hash entry. */
3102
3103 struct ppc_elf_link_hash_entry
3104 {
3105 struct elf_link_hash_entry elf;
3106
3107 /* If this symbol is used in the linker created sections, the processor
3108 specific backend uses this field to map the field into the offset
3109 from the beginning of the section. */
3110 elf_linker_section_pointers_t *linker_section_pointer;
3111
3112 /* Track dynamic relocs copied for this symbol. */
3113 struct elf_dyn_relocs *dyn_relocs;
3114
3115 /* Contexts in which symbol is used in the GOT (or TOC).
3116 TLS_GD .. TLS_TLS bits are or'd into the mask as the
3117 corresponding relocs are encountered during check_relocs.
3118 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
3119 indicate the corresponding GOT entry type is not needed. */
3120 #define TLS_GD 1 /* GD reloc. */
3121 #define TLS_LD 2 /* LD reloc. */
3122 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
3123 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
3124 #define TLS_TLS 16 /* Any TLS reloc. */
3125 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
3126 #define PLT_IFUNC 64 /* STT_GNU_IFUNC. */
3127 char tls_mask;
3128
3129 /* Nonzero if we have seen a small data relocation referring to this
3130 symbol. */
3131 unsigned char has_sda_refs;
3132 };
3133
3134 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
3135
3136 /* PPC ELF linker hash table. */
3137
3138 struct ppc_elf_link_hash_table
3139 {
3140 struct elf_link_hash_table elf;
3141
3142 /* Short-cuts to get to dynamic linker sections. */
3143 asection *got;
3144 asection *relgot;
3145 asection *glink;
3146 asection *plt;
3147 asection *relplt;
3148 asection *iplt;
3149 asection *reliplt;
3150 asection *dynbss;
3151 asection *relbss;
3152 asection *dynsbss;
3153 asection *relsbss;
3154 elf_linker_section_t sdata[2];
3155 asection *sbss;
3156 asection *glink_eh_frame;
3157
3158 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3159 asection *srelplt2;
3160
3161 /* The .got.plt section (VxWorks only)*/
3162 asection *sgotplt;
3163
3164 /* Shortcut to __tls_get_addr. */
3165 struct elf_link_hash_entry *tls_get_addr;
3166
3167 /* The bfd that forced an old-style PLT. */
3168 bfd *old_bfd;
3169
3170 /* TLS local dynamic got entry handling. */
3171 union {
3172 bfd_signed_vma refcount;
3173 bfd_vma offset;
3174 } tlsld_got;
3175
3176 /* Offset of branch table to PltResolve function in glink. */
3177 bfd_vma glink_pltresolve;
3178
3179 /* Size of reserved GOT entries. */
3180 unsigned int got_header_size;
3181 /* Non-zero if allocating the header left a gap. */
3182 unsigned int got_gap;
3183
3184 /* The type of PLT we have chosen to use. */
3185 enum ppc_elf_plt_type plt_type;
3186
3187 /* Set if we should emit symbols for stubs. */
3188 unsigned int emit_stub_syms:1;
3189
3190 /* Set if __tls_get_addr optimization should not be done. */
3191 unsigned int no_tls_get_addr_opt:1;
3192
3193 /* True if the target system is VxWorks. */
3194 unsigned int is_vxworks:1;
3195
3196 /* The size of PLT entries. */
3197 int plt_entry_size;
3198 /* The distance between adjacent PLT slots. */
3199 int plt_slot_size;
3200 /* The size of the first PLT entry. */
3201 int plt_initial_entry_size;
3202
3203 /* Small local sym cache. */
3204 struct sym_cache sym_cache;
3205 };
3206
3207 /* Rename some of the generic section flags to better document how they
3208 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3209
3210 /* Nonzero if this section has TLS related relocations. */
3211 #define has_tls_reloc sec_flg0
3212
3213 /* Nonzero if this section has a call to __tls_get_addr. */
3214 #define has_tls_get_addr_call sec_flg1
3215
3216 /* Get the PPC ELF linker hash table from a link_info structure. */
3217
3218 #define ppc_elf_hash_table(p) \
3219 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3220 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3221
3222 /* Create an entry in a PPC ELF linker hash table. */
3223
3224 static struct bfd_hash_entry *
3225 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3226 struct bfd_hash_table *table,
3227 const char *string)
3228 {
3229 /* Allocate the structure if it has not already been allocated by a
3230 subclass. */
3231 if (entry == NULL)
3232 {
3233 entry = bfd_hash_allocate (table,
3234 sizeof (struct ppc_elf_link_hash_entry));
3235 if (entry == NULL)
3236 return entry;
3237 }
3238
3239 /* Call the allocation method of the superclass. */
3240 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3241 if (entry != NULL)
3242 {
3243 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3244 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3245 ppc_elf_hash_entry (entry)->tls_mask = 0;
3246 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3247 }
3248
3249 return entry;
3250 }
3251
3252 /* Create a PPC ELF linker hash table. */
3253
3254 static struct bfd_link_hash_table *
3255 ppc_elf_link_hash_table_create (bfd *abfd)
3256 {
3257 struct ppc_elf_link_hash_table *ret;
3258
3259 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3260 if (ret == NULL)
3261 return NULL;
3262
3263 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3264 ppc_elf_link_hash_newfunc,
3265 sizeof (struct ppc_elf_link_hash_entry),
3266 PPC32_ELF_DATA))
3267 {
3268 free (ret);
3269 return NULL;
3270 }
3271
3272 ret->elf.init_plt_refcount.refcount = 0;
3273 ret->elf.init_plt_refcount.glist = NULL;
3274 ret->elf.init_plt_offset.offset = 0;
3275 ret->elf.init_plt_offset.glist = NULL;
3276
3277 ret->sdata[0].name = ".sdata";
3278 ret->sdata[0].sym_name = "_SDA_BASE_";
3279 ret->sdata[0].bss_name = ".sbss";
3280
3281 ret->sdata[1].name = ".sdata2";
3282 ret->sdata[1].sym_name = "_SDA2_BASE_";
3283 ret->sdata[1].bss_name = ".sbss2";
3284
3285 ret->plt_entry_size = 12;
3286 ret->plt_slot_size = 8;
3287 ret->plt_initial_entry_size = 72;
3288
3289 return &ret->elf.root;
3290 }
3291
3292 /* Create .got and the related sections. */
3293
3294 static bfd_boolean
3295 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3296 {
3297 struct ppc_elf_link_hash_table *htab;
3298 asection *s;
3299 flagword flags;
3300
3301 if (!_bfd_elf_create_got_section (abfd, info))
3302 return FALSE;
3303
3304 htab = ppc_elf_hash_table (info);
3305 htab->got = s = bfd_get_linker_section (abfd, ".got");
3306 if (s == NULL)
3307 abort ();
3308
3309 if (htab->is_vxworks)
3310 {
3311 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3312 if (!htab->sgotplt)
3313 abort ();
3314 }
3315 else
3316 {
3317 /* The powerpc .got has a blrl instruction in it. Mark it
3318 executable. */
3319 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3320 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3321 if (!bfd_set_section_flags (abfd, s, flags))
3322 return FALSE;
3323 }
3324
3325 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3326 if (!htab->relgot)
3327 abort ();
3328
3329 return TRUE;
3330 }
3331
3332 static bfd_boolean
3333 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3334 {
3335 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3336 asection *s;
3337 flagword flags;
3338
3339 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3340 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3341 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3342 htab->glink = s;
3343 if (s == NULL
3344 || !bfd_set_section_alignment (abfd, s, 4))
3345 return FALSE;
3346
3347 if (!info->no_ld_generated_unwind_info)
3348 {
3349 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3350 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3351 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3352 htab->glink_eh_frame = s;
3353 if (s == NULL
3354 || !bfd_set_section_alignment (abfd, s, 2))
3355 return FALSE;
3356 }
3357
3358 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3359 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3360 htab->iplt = s;
3361 if (s == NULL
3362 || !bfd_set_section_alignment (abfd, s, 4))
3363 return FALSE;
3364
3365 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3366 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3367 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3368 htab->reliplt = s;
3369 if (s == NULL
3370 || ! bfd_set_section_alignment (abfd, s, 2))
3371 return FALSE;
3372 return TRUE;
3373 }
3374
3375 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3376 to output sections (just like _bfd_elf_create_dynamic_sections has
3377 to create .dynbss and .rela.bss). */
3378
3379 static bfd_boolean
3380 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3381 {
3382 struct ppc_elf_link_hash_table *htab;
3383 asection *s;
3384 flagword flags;
3385
3386 htab = ppc_elf_hash_table (info);
3387
3388 if (htab->got == NULL
3389 && !ppc_elf_create_got (abfd, info))
3390 return FALSE;
3391
3392 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3393 return FALSE;
3394
3395 if (htab->glink == NULL
3396 && !ppc_elf_create_glink (abfd, info))
3397 return FALSE;
3398
3399 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3400 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3401 SEC_ALLOC | SEC_LINKER_CREATED);
3402 htab->dynsbss = s;
3403 if (s == NULL)
3404 return FALSE;
3405
3406 if (! info->shared)
3407 {
3408 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3409 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3410 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3411 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3412 htab->relsbss = s;
3413 if (s == NULL
3414 || ! bfd_set_section_alignment (abfd, s, 2))
3415 return FALSE;
3416 }
3417
3418 if (htab->is_vxworks
3419 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3420 return FALSE;
3421
3422 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3423 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3424 if (s == NULL)
3425 abort ();
3426
3427 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3428 if (htab->plt_type == PLT_VXWORKS)
3429 /* The VxWorks PLT is a loaded section with contents. */
3430 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3431 return bfd_set_section_flags (abfd, s, flags);
3432 }
3433
3434 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3435
3436 static void
3437 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3438 struct elf_link_hash_entry *dir,
3439 struct elf_link_hash_entry *ind)
3440 {
3441 struct ppc_elf_link_hash_entry *edir, *eind;
3442
3443 edir = (struct ppc_elf_link_hash_entry *) dir;
3444 eind = (struct ppc_elf_link_hash_entry *) ind;
3445
3446 edir->tls_mask |= eind->tls_mask;
3447 edir->has_sda_refs |= eind->has_sda_refs;
3448
3449 /* If called to transfer flags for a weakdef during processing
3450 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3451 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3452 if (!(ELIMINATE_COPY_RELOCS
3453 && eind->elf.root.type != bfd_link_hash_indirect
3454 && edir->elf.dynamic_adjusted))
3455 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3456
3457 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3458 edir->elf.ref_regular |= eind->elf.ref_regular;
3459 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3460 edir->elf.needs_plt |= eind->elf.needs_plt;
3461 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3462
3463 if (eind->dyn_relocs != NULL)
3464 {
3465 if (edir->dyn_relocs != NULL)
3466 {
3467 struct elf_dyn_relocs **pp;
3468 struct elf_dyn_relocs *p;
3469
3470 /* Add reloc counts against the indirect sym to the direct sym
3471 list. Merge any entries against the same section. */
3472 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3473 {
3474 struct elf_dyn_relocs *q;
3475
3476 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3477 if (q->sec == p->sec)
3478 {
3479 q->pc_count += p->pc_count;
3480 q->count += p->count;
3481 *pp = p->next;
3482 break;
3483 }
3484 if (q == NULL)
3485 pp = &p->next;
3486 }
3487 *pp = edir->dyn_relocs;
3488 }
3489
3490 edir->dyn_relocs = eind->dyn_relocs;
3491 eind->dyn_relocs = NULL;
3492 }
3493
3494 /* If we were called to copy over info for a weak sym, that's all.
3495 You might think dyn_relocs need not be copied over; After all,
3496 both syms will be dynamic or both non-dynamic so we're just
3497 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3498 code in ppc_elf_adjust_dynamic_symbol needs to check for
3499 dyn_relocs in read-only sections, and it does so on what is the
3500 DIR sym here. */
3501 if (eind->elf.root.type != bfd_link_hash_indirect)
3502 return;
3503
3504 /* Copy over the GOT refcount entries that we may have already seen to
3505 the symbol which just became indirect. */
3506 edir->elf.got.refcount += eind->elf.got.refcount;
3507 eind->elf.got.refcount = 0;
3508
3509 /* And plt entries. */
3510 if (eind->elf.plt.plist != NULL)
3511 {
3512 if (edir->elf.plt.plist != NULL)
3513 {
3514 struct plt_entry **entp;
3515 struct plt_entry *ent;
3516
3517 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3518 {
3519 struct plt_entry *dent;
3520
3521 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3522 if (dent->sec == ent->sec && dent->addend == ent->addend)
3523 {
3524 dent->plt.refcount += ent->plt.refcount;
3525 *entp = ent->next;
3526 break;
3527 }
3528 if (dent == NULL)
3529 entp = &ent->next;
3530 }
3531 *entp = edir->elf.plt.plist;
3532 }
3533
3534 edir->elf.plt.plist = eind->elf.plt.plist;
3535 eind->elf.plt.plist = NULL;
3536 }
3537
3538 if (eind->elf.dynindx != -1)
3539 {
3540 if (edir->elf.dynindx != -1)
3541 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3542 edir->elf.dynstr_index);
3543 edir->elf.dynindx = eind->elf.dynindx;
3544 edir->elf.dynstr_index = eind->elf.dynstr_index;
3545 eind->elf.dynindx = -1;
3546 eind->elf.dynstr_index = 0;
3547 }
3548 }
3549
3550 /* Hook called by the linker routine which adds symbols from an object
3551 file. We use it to put .comm items in .sbss, and not .bss. */
3552
3553 static bfd_boolean
3554 ppc_elf_add_symbol_hook (bfd *abfd,
3555 struct bfd_link_info *info,
3556 Elf_Internal_Sym *sym,
3557 const char **namep ATTRIBUTE_UNUSED,
3558 flagword *flagsp ATTRIBUTE_UNUSED,
3559 asection **secp,
3560 bfd_vma *valp)
3561 {
3562 if (sym->st_shndx == SHN_COMMON
3563 && !info->relocatable
3564 && is_ppc_elf (info->output_bfd)
3565 && sym->st_size <= elf_gp_size (abfd))
3566 {
3567 /* Common symbols less than or equal to -G nn bytes are automatically
3568 put into .sbss. */
3569 struct ppc_elf_link_hash_table *htab;
3570
3571 htab = ppc_elf_hash_table (info);
3572 if (htab->sbss == NULL)
3573 {
3574 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3575
3576 if (!htab->elf.dynobj)
3577 htab->elf.dynobj = abfd;
3578
3579 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3580 ".sbss",
3581 flags);
3582 if (htab->sbss == NULL)
3583 return FALSE;
3584 }
3585
3586 *secp = htab->sbss;
3587 *valp = sym->st_size;
3588 }
3589
3590 if ((abfd->flags & DYNAMIC) == 0
3591 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3592 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3593 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3594
3595 return TRUE;
3596 }
3597 \f
3598 static bfd_boolean
3599 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3600 {
3601 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3602
3603 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3604 TRUE, FALSE, TRUE);
3605 if (lsect->sym == NULL)
3606 return FALSE;
3607 if (lsect->sym->root.type == bfd_link_hash_new)
3608 lsect->sym->non_elf = 0;
3609 lsect->sym->ref_regular = 1;
3610 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3611 return TRUE;
3612 }
3613
3614 /* Create a special linker section. */
3615
3616 static bfd_boolean
3617 ppc_elf_create_linker_section (bfd *abfd,
3618 struct bfd_link_info *info,
3619 flagword flags,
3620 elf_linker_section_t *lsect)
3621 {
3622 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3623 asection *s;
3624
3625 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3626 | SEC_LINKER_CREATED);
3627
3628 /* Record the first bfd that needs the special sections. */
3629 if (!htab->elf.dynobj)
3630 htab->elf.dynobj = abfd;
3631
3632 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3633 lsect->name,
3634 flags);
3635 if (s == NULL
3636 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3637 return FALSE;
3638 lsect->section = s;
3639
3640 return create_sdata_sym (info, lsect);
3641 }
3642
3643 /* Find a linker generated pointer with a given addend and type. */
3644
3645 static elf_linker_section_pointers_t *
3646 elf_find_pointer_linker_section
3647 (elf_linker_section_pointers_t *linker_pointers,
3648 bfd_vma addend,
3649 elf_linker_section_t *lsect)
3650 {
3651 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3652 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3653 return linker_pointers;
3654
3655 return NULL;
3656 }
3657
3658 /* Allocate a pointer to live in a linker created section. */
3659
3660 static bfd_boolean
3661 elf_create_pointer_linker_section (bfd *abfd,
3662 elf_linker_section_t *lsect,
3663 struct elf_link_hash_entry *h,
3664 const Elf_Internal_Rela *rel)
3665 {
3666 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3667 elf_linker_section_pointers_t *linker_section_ptr;
3668 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3669 bfd_size_type amt;
3670
3671 BFD_ASSERT (lsect != NULL);
3672
3673 /* Is this a global symbol? */
3674 if (h != NULL)
3675 {
3676 struct ppc_elf_link_hash_entry *eh;
3677
3678 /* Has this symbol already been allocated? If so, our work is done. */
3679 eh = (struct ppc_elf_link_hash_entry *) h;
3680 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3681 rel->r_addend,
3682 lsect))
3683 return TRUE;
3684
3685 ptr_linker_section_ptr = &eh->linker_section_pointer;
3686 }
3687 else
3688 {
3689 BFD_ASSERT (is_ppc_elf (abfd));
3690
3691 /* Allocation of a pointer to a local symbol. */
3692 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3693
3694 /* Allocate a table to hold the local symbols if first time. */
3695 if (!ptr)
3696 {
3697 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3698
3699 amt = num_symbols;
3700 amt *= sizeof (elf_linker_section_pointers_t *);
3701 ptr = bfd_zalloc (abfd, amt);
3702
3703 if (!ptr)
3704 return FALSE;
3705
3706 elf_local_ptr_offsets (abfd) = ptr;
3707 }
3708
3709 /* Has this symbol already been allocated? If so, our work is done. */
3710 if (elf_find_pointer_linker_section (ptr[r_symndx],
3711 rel->r_addend,
3712 lsect))
3713 return TRUE;
3714
3715 ptr_linker_section_ptr = &ptr[r_symndx];
3716 }
3717
3718 /* Allocate space for a pointer in the linker section, and allocate
3719 a new pointer record from internal memory. */
3720 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3721 amt = sizeof (elf_linker_section_pointers_t);
3722 linker_section_ptr = bfd_alloc (abfd, amt);
3723
3724 if (!linker_section_ptr)
3725 return FALSE;
3726
3727 linker_section_ptr->next = *ptr_linker_section_ptr;
3728 linker_section_ptr->addend = rel->r_addend;
3729 linker_section_ptr->lsect = lsect;
3730 *ptr_linker_section_ptr = linker_section_ptr;
3731
3732 linker_section_ptr->offset = lsect->section->size;
3733 lsect->section->size += 4;
3734
3735 #ifdef DEBUG
3736 fprintf (stderr,
3737 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3738 lsect->name, (long) linker_section_ptr->offset,
3739 (long) lsect->section->size);
3740 #endif
3741
3742 return TRUE;
3743 }
3744
3745 static struct plt_entry **
3746 update_local_sym_info (bfd *abfd,
3747 Elf_Internal_Shdr *symtab_hdr,
3748 unsigned long r_symndx,
3749 int tls_type)
3750 {
3751 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3752 struct plt_entry **local_plt;
3753 char *local_got_tls_masks;
3754
3755 if (local_got_refcounts == NULL)
3756 {
3757 bfd_size_type size = symtab_hdr->sh_info;
3758
3759 size *= (sizeof (*local_got_refcounts)
3760 + sizeof (*local_plt)
3761 + sizeof (*local_got_tls_masks));
3762 local_got_refcounts = bfd_zalloc (abfd, size);
3763 if (local_got_refcounts == NULL)
3764 return NULL;
3765 elf_local_got_refcounts (abfd) = local_got_refcounts;
3766 }
3767
3768 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3769 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3770 local_got_tls_masks[r_symndx] |= tls_type;
3771 if (tls_type != PLT_IFUNC)
3772 local_got_refcounts[r_symndx] += 1;
3773 return local_plt + r_symndx;
3774 }
3775
3776 static bfd_boolean
3777 update_plt_info (bfd *abfd, struct plt_entry **plist,
3778 asection *sec, bfd_vma addend)
3779 {
3780 struct plt_entry *ent;
3781
3782 if (addend < 32768)
3783 sec = NULL;
3784 for (ent = *plist; ent != NULL; ent = ent->next)
3785 if (ent->sec == sec && ent->addend == addend)
3786 break;
3787 if (ent == NULL)
3788 {
3789 bfd_size_type amt = sizeof (*ent);
3790 ent = bfd_alloc (abfd, amt);
3791 if (ent == NULL)
3792 return FALSE;
3793 ent->next = *plist;
3794 ent->sec = sec;
3795 ent->addend = addend;
3796 ent->plt.refcount = 0;
3797 *plist = ent;
3798 }
3799 ent->plt.refcount += 1;
3800 return TRUE;
3801 }
3802
3803 static struct plt_entry *
3804 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3805 {
3806 struct plt_entry *ent;
3807
3808 if (addend < 32768)
3809 sec = NULL;
3810 for (ent = *plist; ent != NULL; ent = ent->next)
3811 if (ent->sec == sec && ent->addend == addend)
3812 break;
3813 return ent;
3814 }
3815
3816 static bfd_boolean
3817 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3818 {
3819 return (r_type == R_PPC_PLTREL24
3820 || r_type == R_PPC_LOCAL24PC
3821 || r_type == R_PPC_REL24
3822 || r_type == R_PPC_REL14
3823 || r_type == R_PPC_REL14_BRTAKEN
3824 || r_type == R_PPC_REL14_BRNTAKEN
3825 || r_type == R_PPC_ADDR24
3826 || r_type == R_PPC_ADDR14
3827 || r_type == R_PPC_ADDR14_BRTAKEN
3828 || r_type == R_PPC_ADDR14_BRNTAKEN);
3829 }
3830
3831 static void
3832 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3833 {
3834 (*_bfd_error_handler)
3835 (_("%B: relocation %s cannot be used when making a shared object"),
3836 abfd,
3837 ppc_elf_howto_table[r_type]->name);
3838 bfd_set_error (bfd_error_bad_value);
3839 }
3840
3841 /* Look through the relocs for a section during the first phase, and
3842 allocate space in the global offset table or procedure linkage
3843 table. */
3844
3845 static bfd_boolean
3846 ppc_elf_check_relocs (bfd *abfd,
3847 struct bfd_link_info *info,
3848 asection *sec,
3849 const Elf_Internal_Rela *relocs)
3850 {
3851 struct ppc_elf_link_hash_table *htab;
3852 Elf_Internal_Shdr *symtab_hdr;
3853 struct elf_link_hash_entry **sym_hashes;
3854 const Elf_Internal_Rela *rel;
3855 const Elf_Internal_Rela *rel_end;
3856 asection *got2, *sreloc;
3857 struct elf_link_hash_entry *tga;
3858
3859 if (info->relocatable)
3860 return TRUE;
3861
3862 /* Don't do anything special with non-loaded, non-alloced sections.
3863 In particular, any relocs in such sections should not affect GOT
3864 and PLT reference counting (ie. we don't allow them to create GOT
3865 or PLT entries), there's no possibility or desire to optimize TLS
3866 relocs, and there's not much point in propagating relocs to shared
3867 libs that the dynamic linker won't relocate. */
3868 if ((sec->flags & SEC_ALLOC) == 0)
3869 return TRUE;
3870
3871 #ifdef DEBUG
3872 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3873 sec, abfd);
3874 #endif
3875
3876 BFD_ASSERT (is_ppc_elf (abfd));
3877
3878 /* Initialize howto table if not already done. */
3879 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3880 ppc_elf_howto_init ();
3881
3882 htab = ppc_elf_hash_table (info);
3883 if (htab->glink == NULL)
3884 {
3885 if (htab->elf.dynobj == NULL)
3886 htab->elf.dynobj = abfd;
3887 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3888 return FALSE;
3889 }
3890 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3891 FALSE, FALSE, TRUE);
3892 symtab_hdr = &elf_symtab_hdr (abfd);
3893 sym_hashes = elf_sym_hashes (abfd);
3894 got2 = bfd_get_section_by_name (abfd, ".got2");
3895 sreloc = NULL;
3896
3897 rel_end = relocs + sec->reloc_count;
3898 for (rel = relocs; rel < rel_end; rel++)
3899 {
3900 unsigned long r_symndx;
3901 enum elf_ppc_reloc_type r_type;
3902 struct elf_link_hash_entry *h;
3903 int tls_type;
3904
3905 r_symndx = ELF32_R_SYM (rel->r_info);
3906 if (r_symndx < symtab_hdr->sh_info)
3907 h = NULL;
3908 else
3909 {
3910 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3911 while (h->root.type == bfd_link_hash_indirect
3912 || h->root.type == bfd_link_hash_warning)
3913 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3914
3915 /* PR15323, ref flags aren't set for references in the same
3916 object. */
3917 h->root.non_ir_ref = 1;
3918 }
3919
3920 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3921 This shows up in particular in an R_PPC_ADDR32 in the eabi
3922 startup code. */
3923 if (h != NULL
3924 && htab->got == NULL
3925 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3926 {
3927 if (htab->elf.dynobj == NULL)
3928 htab->elf.dynobj = abfd;
3929 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3930 return FALSE;
3931 BFD_ASSERT (h == htab->elf.hgot);
3932 }
3933
3934 tls_type = 0;
3935 r_type = ELF32_R_TYPE (rel->r_info);
3936 if (h == NULL && !htab->is_vxworks)
3937 {
3938 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3939 abfd, r_symndx);
3940 if (isym == NULL)
3941 return FALSE;
3942
3943 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3944 {
3945 struct plt_entry **ifunc;
3946
3947 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3948 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3949 PLT_IFUNC);
3950 if (ifunc == NULL)
3951 return FALSE;
3952
3953 /* STT_GNU_IFUNC symbols must have a PLT entry;
3954 In a non-pie executable even when there are
3955 no plt calls. */
3956 if (!info->shared
3957 || is_branch_reloc (r_type))
3958 {
3959 bfd_vma addend = 0;
3960 if (r_type == R_PPC_PLTREL24)
3961 {
3962 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3963 if (info->shared)
3964 addend = rel->r_addend;
3965 }
3966 if (!update_plt_info (abfd, ifunc, got2, addend))
3967 return FALSE;
3968 }
3969 }
3970 }
3971
3972 if (!htab->is_vxworks
3973 && is_branch_reloc (r_type)
3974 && h != NULL
3975 && h == tga)
3976 {
3977 if (rel != relocs
3978 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3979 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3980 /* We have a new-style __tls_get_addr call with a marker
3981 reloc. */
3982 ;
3983 else
3984 /* Mark this section as having an old-style call. */
3985 sec->has_tls_get_addr_call = 1;
3986 }
3987
3988 switch (r_type)
3989 {
3990 case R_PPC_TLSGD:
3991 case R_PPC_TLSLD:
3992 /* These special tls relocs tie a call to __tls_get_addr with
3993 its parameter symbol. */
3994 break;
3995
3996 case R_PPC_GOT_TLSLD16:
3997 case R_PPC_GOT_TLSLD16_LO:
3998 case R_PPC_GOT_TLSLD16_HI:
3999 case R_PPC_GOT_TLSLD16_HA:
4000 tls_type = TLS_TLS | TLS_LD;
4001 goto dogottls;
4002
4003 case R_PPC_GOT_TLSGD16:
4004 case R_PPC_GOT_TLSGD16_LO:
4005 case R_PPC_GOT_TLSGD16_HI:
4006 case R_PPC_GOT_TLSGD16_HA:
4007 tls_type = TLS_TLS | TLS_GD;
4008 goto dogottls;
4009
4010 case R_PPC_GOT_TPREL16:
4011 case R_PPC_GOT_TPREL16_LO:
4012 case R_PPC_GOT_TPREL16_HI:
4013 case R_PPC_GOT_TPREL16_HA:
4014 if (!info->executable)
4015 info->flags |= DF_STATIC_TLS;
4016 tls_type = TLS_TLS | TLS_TPREL;
4017 goto dogottls;
4018
4019 case R_PPC_GOT_DTPREL16:
4020 case R_PPC_GOT_DTPREL16_LO:
4021 case R_PPC_GOT_DTPREL16_HI:
4022 case R_PPC_GOT_DTPREL16_HA:
4023 tls_type = TLS_TLS | TLS_DTPREL;
4024 dogottls:
4025 sec->has_tls_reloc = 1;
4026 /* Fall thru */
4027
4028 /* GOT16 relocations */
4029 case R_PPC_GOT16:
4030 case R_PPC_GOT16_LO:
4031 case R_PPC_GOT16_HI:
4032 case R_PPC_GOT16_HA:
4033 /* This symbol requires a global offset table entry. */
4034 if (htab->got == NULL)
4035 {
4036 if (htab->elf.dynobj == NULL)
4037 htab->elf.dynobj = abfd;
4038 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4039 return FALSE;
4040 }
4041 if (h != NULL)
4042 {
4043 h->got.refcount += 1;
4044 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4045 }
4046 else
4047 /* This is a global offset table entry for a local symbol. */
4048 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4049 return FALSE;
4050
4051 /* We may also need a plt entry if the symbol turns out to be
4052 an ifunc. */
4053 if (h != NULL && !info->shared)
4054 {
4055 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4056 return FALSE;
4057 }
4058 break;
4059
4060 /* Indirect .sdata relocation. */
4061 case R_PPC_EMB_SDAI16:
4062 if (info->shared)
4063 {
4064 bad_shared_reloc (abfd, r_type);
4065 return FALSE;
4066 }
4067 if (htab->sdata[0].section == NULL
4068 && !ppc_elf_create_linker_section (abfd, info, 0,
4069 &htab->sdata[0]))
4070 return FALSE;
4071 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
4072 h, rel))
4073 return FALSE;
4074 if (h != NULL)
4075 {
4076 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4077 h->non_got_ref = TRUE;
4078 }
4079 break;
4080
4081 /* Indirect .sdata2 relocation. */
4082 case R_PPC_EMB_SDA2I16:
4083 if (info->shared)
4084 {
4085 bad_shared_reloc (abfd, r_type);
4086 return FALSE;
4087 }
4088 if (htab->sdata[1].section == NULL
4089 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
4090 &htab->sdata[1]))
4091 return FALSE;
4092 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
4093 h, rel))
4094 return FALSE;
4095 if (h != NULL)
4096 {
4097 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4098 h->non_got_ref = TRUE;
4099 }
4100 break;
4101
4102 case R_PPC_VLE_SDAREL_LO16A:
4103 case R_PPC_VLE_SDAREL_LO16D:
4104 case R_PPC_VLE_SDAREL_HI16A:
4105 case R_PPC_VLE_SDAREL_HI16D:
4106 case R_PPC_VLE_SDAREL_HA16A:
4107 case R_PPC_VLE_SDAREL_HA16D:
4108 case R_PPC_SDAREL16:
4109 if (htab->sdata[0].sym == NULL
4110 && !create_sdata_sym (info, &htab->sdata[0]))
4111 return FALSE;
4112
4113 if (htab->sdata[1].sym == NULL
4114 && !create_sdata_sym (info, &htab->sdata[1]))
4115 return FALSE;
4116
4117 if (h != NULL)
4118 {
4119 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4120 h->non_got_ref = TRUE;
4121 }
4122 break;
4123
4124 case R_PPC_VLE_REL8:
4125 case R_PPC_VLE_REL15:
4126 case R_PPC_VLE_REL24:
4127 case R_PPC_VLE_LO16A:
4128 case R_PPC_VLE_LO16D:
4129 case R_PPC_VLE_HI16A:
4130 case R_PPC_VLE_HI16D:
4131 case R_PPC_VLE_HA16A:
4132 case R_PPC_VLE_HA16D:
4133 break;
4134
4135 case R_PPC_EMB_SDA2REL:
4136 if (info->shared)
4137 {
4138 bad_shared_reloc (abfd, r_type);
4139 return FALSE;
4140 }
4141 if (htab->sdata[1].sym == NULL
4142 && !create_sdata_sym (info, &htab->sdata[1]))
4143 return FALSE;
4144 if (h != NULL)
4145 {
4146 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4147 h->non_got_ref = TRUE;
4148 }
4149 break;
4150
4151 case R_PPC_VLE_SDA21_LO:
4152 case R_PPC_VLE_SDA21:
4153 case R_PPC_EMB_SDA21:
4154 case R_PPC_EMB_RELSDA:
4155 if (info->shared)
4156 {
4157 bad_shared_reloc (abfd, r_type);
4158 return FALSE;
4159 }
4160 if (htab->sdata[0].sym == NULL
4161 && !create_sdata_sym (info, &htab->sdata[0]))
4162 return FALSE;
4163 if (htab->sdata[1].sym == NULL
4164 && !create_sdata_sym (info, &htab->sdata[1]))
4165 return FALSE;
4166 if (h != NULL)
4167 {
4168 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4169 h->non_got_ref = TRUE;
4170 }
4171 break;
4172
4173 case R_PPC_EMB_NADDR32:
4174 case R_PPC_EMB_NADDR16:
4175 case R_PPC_EMB_NADDR16_LO:
4176 case R_PPC_EMB_NADDR16_HI:
4177 case R_PPC_EMB_NADDR16_HA:
4178 if (info->shared)
4179 {
4180 bad_shared_reloc (abfd, r_type);
4181 return FALSE;
4182 }
4183 if (h != NULL)
4184 h->non_got_ref = TRUE;
4185 break;
4186
4187 case R_PPC_PLTREL24:
4188 if (h == NULL)
4189 break;
4190 /* Fall through */
4191 case R_PPC_PLT32:
4192 case R_PPC_PLTREL32:
4193 case R_PPC_PLT16_LO:
4194 case R_PPC_PLT16_HI:
4195 case R_PPC_PLT16_HA:
4196 #ifdef DEBUG
4197 fprintf (stderr, "Reloc requires a PLT entry\n");
4198 #endif
4199 /* This symbol requires a procedure linkage table entry. We
4200 actually build the entry in finish_dynamic_symbol,
4201 because this might be a case of linking PIC code without
4202 linking in any dynamic objects, in which case we don't
4203 need to generate a procedure linkage table after all. */
4204
4205 if (h == NULL)
4206 {
4207 /* It does not make sense to have a procedure linkage
4208 table entry for a local symbol. */
4209 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4210 abfd, sec, rel->r_offset,
4211 ppc_elf_howto_table[r_type]->name);
4212 bfd_set_error (bfd_error_bad_value);
4213 return FALSE;
4214 }
4215 else
4216 {
4217 bfd_vma addend = 0;
4218
4219 if (r_type == R_PPC_PLTREL24)
4220 {
4221 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4222 if (info->shared)
4223 addend = rel->r_addend;
4224 }
4225 h->needs_plt = 1;
4226 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4227 return FALSE;
4228 }
4229 break;
4230
4231 /* The following relocations don't need to propagate the
4232 relocation if linking a shared object since they are
4233 section relative. */
4234 case R_PPC_SECTOFF:
4235 case R_PPC_SECTOFF_LO:
4236 case R_PPC_SECTOFF_HI:
4237 case R_PPC_SECTOFF_HA:
4238 case R_PPC_DTPREL16:
4239 case R_PPC_DTPREL16_LO:
4240 case R_PPC_DTPREL16_HI:
4241 case R_PPC_DTPREL16_HA:
4242 case R_PPC_TOC16:
4243 break;
4244
4245 case R_PPC_REL16:
4246 case R_PPC_REL16_LO:
4247 case R_PPC_REL16_HI:
4248 case R_PPC_REL16_HA:
4249 ppc_elf_tdata (abfd)->has_rel16 = 1;
4250 break;
4251
4252 /* These are just markers. */
4253 case R_PPC_TLS:
4254 case R_PPC_EMB_MRKREF:
4255 case R_PPC_NONE:
4256 case R_PPC_max:
4257 case R_PPC_RELAX:
4258 case R_PPC_RELAX_PLT:
4259 case R_PPC_RELAX_PLTREL24:
4260 break;
4261
4262 /* These should only appear in dynamic objects. */
4263 case R_PPC_COPY:
4264 case R_PPC_GLOB_DAT:
4265 case R_PPC_JMP_SLOT:
4266 case R_PPC_RELATIVE:
4267 case R_PPC_IRELATIVE:
4268 break;
4269
4270 /* These aren't handled yet. We'll report an error later. */
4271 case R_PPC_ADDR30:
4272 case R_PPC_EMB_RELSEC16:
4273 case R_PPC_EMB_RELST_LO:
4274 case R_PPC_EMB_RELST_HI:
4275 case R_PPC_EMB_RELST_HA:
4276 case R_PPC_EMB_BIT_FLD:
4277 break;
4278
4279 /* This refers only to functions defined in the shared library. */
4280 case R_PPC_LOCAL24PC:
4281 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4282 {
4283 htab->plt_type = PLT_OLD;
4284 htab->old_bfd = abfd;
4285 }
4286 if (h != NULL && h->type == STT_GNU_IFUNC)
4287 {
4288 if (info->shared)
4289 {
4290 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4291 abfd, sec, rel->r_offset,
4292 h->root.root.string);
4293 bfd_set_error (bfd_error_bad_value);
4294 return FALSE;
4295 }
4296 h->needs_plt = 1;
4297 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4298 return FALSE;
4299 }
4300 break;
4301
4302 /* This relocation describes the C++ object vtable hierarchy.
4303 Reconstruct it for later use during GC. */
4304 case R_PPC_GNU_VTINHERIT:
4305 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4306 return FALSE;
4307 break;
4308
4309 /* This relocation describes which C++ vtable entries are actually
4310 used. Record for later use during GC. */
4311 case R_PPC_GNU_VTENTRY:
4312 BFD_ASSERT (h != NULL);
4313 if (h != NULL
4314 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4315 return FALSE;
4316 break;
4317
4318 /* We shouldn't really be seeing these. */
4319 case R_PPC_TPREL32:
4320 case R_PPC_TPREL16:
4321 case R_PPC_TPREL16_LO:
4322 case R_PPC_TPREL16_HI:
4323 case R_PPC_TPREL16_HA:
4324 if (!info->executable)
4325 info->flags |= DF_STATIC_TLS;
4326 goto dodyn;
4327
4328 /* Nor these. */
4329 case R_PPC_DTPMOD32:
4330 case R_PPC_DTPREL32:
4331 goto dodyn;
4332
4333 case R_PPC_REL32:
4334 if (h == NULL
4335 && got2 != NULL
4336 && (sec->flags & SEC_CODE) != 0
4337 && info->shared
4338 && htab->plt_type == PLT_UNSET)
4339 {
4340 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4341 the start of a function, which assembles to a REL32
4342 reference to .got2. If we detect one of these, then
4343 force the old PLT layout because the linker cannot
4344 reliably deduce the GOT pointer value needed for
4345 PLT call stubs. */
4346 asection *s;
4347 Elf_Internal_Sym *isym;
4348
4349 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4350 abfd, r_symndx);
4351 if (isym == NULL)
4352 return FALSE;
4353
4354 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4355 if (s == got2)
4356 {
4357 htab->plt_type = PLT_OLD;
4358 htab->old_bfd = abfd;
4359 }
4360 }
4361 if (h == NULL || h == htab->elf.hgot)
4362 break;
4363 /* fall through */
4364
4365 case R_PPC_ADDR32:
4366 case R_PPC_ADDR16:
4367 case R_PPC_ADDR16_LO:
4368 case R_PPC_ADDR16_HI:
4369 case R_PPC_ADDR16_HA:
4370 case R_PPC_UADDR32:
4371 case R_PPC_UADDR16:
4372 if (h != NULL && !info->shared)
4373 {
4374 /* We may need a plt entry if the symbol turns out to be
4375 a function defined in a dynamic object. */
4376 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4377 return FALSE;
4378
4379 /* We may need a copy reloc too. */
4380 h->non_got_ref = 1;
4381 h->pointer_equality_needed = 1;
4382 }
4383 goto dodyn;
4384
4385 case R_PPC_REL24:
4386 case R_PPC_REL14:
4387 case R_PPC_REL14_BRTAKEN:
4388 case R_PPC_REL14_BRNTAKEN:
4389 if (h == NULL)
4390 break;
4391 if (h == htab->elf.hgot)
4392 {
4393 if (htab->plt_type == PLT_UNSET)
4394 {
4395 htab->plt_type = PLT_OLD;
4396 htab->old_bfd = abfd;
4397 }
4398 break;
4399 }
4400 /* fall through */
4401
4402 case R_PPC_ADDR24:
4403 case R_PPC_ADDR14:
4404 case R_PPC_ADDR14_BRTAKEN:
4405 case R_PPC_ADDR14_BRNTAKEN:
4406 if (h != NULL && !info->shared)
4407 {
4408 /* We may need a plt entry if the symbol turns out to be
4409 a function defined in a dynamic object. */
4410 h->needs_plt = 1;
4411 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4412 return FALSE;
4413 break;
4414 }
4415
4416 dodyn:
4417 /* If we are creating a shared library, and this is a reloc
4418 against a global symbol, or a non PC relative reloc
4419 against a local symbol, then we need to copy the reloc
4420 into the shared library. However, if we are linking with
4421 -Bsymbolic, we do not need to copy a reloc against a
4422 global symbol which is defined in an object we are
4423 including in the link (i.e., DEF_REGULAR is set). At
4424 this point we have not seen all the input files, so it is
4425 possible that DEF_REGULAR is not set now but will be set
4426 later (it is never cleared). In case of a weak definition,
4427 DEF_REGULAR may be cleared later by a strong definition in
4428 a shared library. We account for that possibility below by
4429 storing information in the dyn_relocs field of the hash
4430 table entry. A similar situation occurs when creating
4431 shared libraries and symbol visibility changes render the
4432 symbol local.
4433
4434 If on the other hand, we are creating an executable, we
4435 may need to keep relocations for symbols satisfied by a
4436 dynamic library if we manage to avoid copy relocs for the
4437 symbol. */
4438 if ((info->shared
4439 && (must_be_dyn_reloc (info, r_type)
4440 || (h != NULL
4441 && (!SYMBOLIC_BIND (info, h)
4442 || h->root.type == bfd_link_hash_defweak
4443 || !h->def_regular))))
4444 || (ELIMINATE_COPY_RELOCS
4445 && !info->shared
4446 && h != NULL
4447 && (h->root.type == bfd_link_hash_defweak
4448 || !h->def_regular)))
4449 {
4450 #ifdef DEBUG
4451 fprintf (stderr,
4452 "ppc_elf_check_relocs needs to "
4453 "create relocation for %s\n",
4454 (h && h->root.root.string
4455 ? h->root.root.string : "<unknown>"));
4456 #endif
4457 if (sreloc == NULL)
4458 {
4459 if (htab->elf.dynobj == NULL)
4460 htab->elf.dynobj = abfd;
4461
4462 sreloc = _bfd_elf_make_dynamic_reloc_section
4463 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4464
4465 if (sreloc == NULL)
4466 return FALSE;
4467 }
4468
4469 /* If this is a global symbol, we count the number of
4470 relocations we need for this symbol. */
4471 if (h != NULL)
4472 {
4473 struct elf_dyn_relocs *p;
4474 struct elf_dyn_relocs **rel_head;
4475
4476 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4477 p = *rel_head;
4478 if (p == NULL || p->sec != sec)
4479 {
4480 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4481 if (p == NULL)
4482 return FALSE;
4483 p->next = *rel_head;
4484 *rel_head = p;
4485 p->sec = sec;
4486 p->count = 0;
4487 p->pc_count = 0;
4488 }
4489 p->count += 1;
4490 if (!must_be_dyn_reloc (info, r_type))
4491 p->pc_count += 1;
4492 }
4493 else
4494 {
4495 /* Track dynamic relocs needed for local syms too.
4496 We really need local syms available to do this
4497 easily. Oh well. */
4498 struct ppc_dyn_relocs *p;
4499 struct ppc_dyn_relocs **rel_head;
4500 bfd_boolean is_ifunc;
4501 asection *s;
4502 void *vpp;
4503 Elf_Internal_Sym *isym;
4504
4505 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4506 abfd, r_symndx);
4507 if (isym == NULL)
4508 return FALSE;
4509
4510 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4511 if (s == NULL)
4512 s = sec;
4513
4514 vpp = &elf_section_data (s)->local_dynrel;
4515 rel_head = (struct ppc_dyn_relocs **) vpp;
4516 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4517 p = *rel_head;
4518 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4519 p = p->next;
4520 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4521 {
4522 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4523 if (p == NULL)
4524 return FALSE;
4525 p->next = *rel_head;
4526 *rel_head = p;
4527 p->sec = sec;
4528 p->ifunc = is_ifunc;
4529 p->count = 0;
4530 }
4531 p->count += 1;
4532 }
4533 }
4534
4535 break;
4536 }
4537 }
4538
4539 return TRUE;
4540 }
4541 \f
4542
4543 /* Merge object attributes from IBFD into OBFD. Raise an error if
4544 there are conflicting attributes. */
4545 static bfd_boolean
4546 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4547 {
4548 obj_attribute *in_attr, *in_attrs;
4549 obj_attribute *out_attr, *out_attrs;
4550
4551 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4552 {
4553 /* This is the first object. Copy the attributes. */
4554 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4555
4556 /* Use the Tag_null value to indicate the attributes have been
4557 initialized. */
4558 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4559
4560 return TRUE;
4561 }
4562
4563 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4564 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4565
4566 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4567 non-conflicting ones. */
4568 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4569 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4570 if (in_attr->i != out_attr->i)
4571 {
4572 out_attr->type = 1;
4573 if (out_attr->i == 0)
4574 out_attr->i = in_attr->i;
4575 else if (in_attr->i == 0)
4576 ;
4577 else if (out_attr->i == 1 && in_attr->i == 2)
4578 _bfd_error_handler
4579 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4580 else if (out_attr->i == 1 && in_attr->i == 3)
4581 _bfd_error_handler
4582 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4583 obfd, ibfd);
4584 else if (out_attr->i == 3 && in_attr->i == 1)
4585 _bfd_error_handler
4586 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4587 ibfd, obfd);
4588 else if (out_attr->i == 3 && in_attr->i == 2)
4589 _bfd_error_handler
4590 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4591 ibfd, obfd);
4592 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4593 _bfd_error_handler
4594 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4595 else if (in_attr->i > 3)
4596 _bfd_error_handler
4597 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4598 in_attr->i);
4599 else
4600 _bfd_error_handler
4601 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4602 out_attr->i);
4603 }
4604
4605 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4606 merge non-conflicting ones. */
4607 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4608 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4609 if (in_attr->i != out_attr->i)
4610 {
4611 const char *in_abi = NULL, *out_abi = NULL;
4612
4613 switch (in_attr->i)
4614 {
4615 case 1: in_abi = "generic"; break;
4616 case 2: in_abi = "AltiVec"; break;
4617 case 3: in_abi = "SPE"; break;
4618 }
4619
4620 switch (out_attr->i)
4621 {
4622 case 1: out_abi = "generic"; break;
4623 case 2: out_abi = "AltiVec"; break;
4624 case 3: out_abi = "SPE"; break;
4625 }
4626
4627 out_attr->type = 1;
4628 if (out_attr->i == 0)
4629 out_attr->i = in_attr->i;
4630 else if (in_attr->i == 0)
4631 ;
4632 /* For now, allow generic to transition to AltiVec or SPE
4633 without a warning. If GCC marked files with their stack
4634 alignment and used don't-care markings for files which are
4635 not affected by the vector ABI, we could warn about this
4636 case too. */
4637 else if (out_attr->i == 1)
4638 out_attr->i = in_attr->i;
4639 else if (in_attr->i == 1)
4640 ;
4641 else if (in_abi == NULL)
4642 _bfd_error_handler
4643 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4644 in_attr->i);
4645 else if (out_abi == NULL)
4646 _bfd_error_handler
4647 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4648 in_attr->i);
4649 else
4650 _bfd_error_handler
4651 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4652 ibfd, obfd, in_abi, out_abi);
4653 }
4654
4655 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4656 and merge non-conflicting ones. */
4657 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4658 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4659 if (in_attr->i != out_attr->i)
4660 {
4661 out_attr->type = 1;
4662 if (out_attr->i == 0)
4663 out_attr->i = in_attr->i;
4664 else if (in_attr->i == 0)
4665 ;
4666 else if (out_attr->i == 1 && in_attr->i == 2)
4667 _bfd_error_handler
4668 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4669 else if (out_attr->i == 2 && in_attr->i == 1)
4670 _bfd_error_handler
4671 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4672 else if (in_attr->i > 2)
4673 _bfd_error_handler
4674 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4675 in_attr->i);
4676 else
4677 _bfd_error_handler
4678 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4679 out_attr->i);
4680 }
4681
4682 /* Merge Tag_compatibility attributes and any common GNU ones. */
4683 _bfd_elf_merge_object_attributes (ibfd, obfd);
4684
4685 return TRUE;
4686 }
4687
4688 /* Merge backend specific data from an object file to the output
4689 object file when linking. */
4690
4691 static bfd_boolean
4692 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4693 {
4694 flagword old_flags;
4695 flagword new_flags;
4696 bfd_boolean error;
4697
4698 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4699 return TRUE;
4700
4701 /* Check if we have the same endianness. */
4702 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4703 return FALSE;
4704
4705 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4706 return FALSE;
4707
4708 new_flags = elf_elfheader (ibfd)->e_flags;
4709 old_flags = elf_elfheader (obfd)->e_flags;
4710 if (!elf_flags_init (obfd))
4711 {
4712 /* First call, no flags set. */
4713 elf_flags_init (obfd) = TRUE;
4714 elf_elfheader (obfd)->e_flags = new_flags;
4715 }
4716
4717 /* Compatible flags are ok. */
4718 else if (new_flags == old_flags)
4719 ;
4720
4721 /* Incompatible flags. */
4722 else
4723 {
4724 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4725 to be linked with either. */
4726 error = FALSE;
4727 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4728 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4729 {
4730 error = TRUE;
4731 (*_bfd_error_handler)
4732 (_("%B: compiled with -mrelocatable and linked with "
4733 "modules compiled normally"), ibfd);
4734 }
4735 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4736 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4737 {
4738 error = TRUE;
4739 (*_bfd_error_handler)
4740 (_("%B: compiled normally and linked with "
4741 "modules compiled with -mrelocatable"), ibfd);
4742 }
4743
4744 /* The output is -mrelocatable-lib iff both the input files are. */
4745 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4746 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4747
4748 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4749 but each input file is either -mrelocatable or -mrelocatable-lib. */
4750 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4751 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4752 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4753 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4754
4755 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4756 any module uses it. */
4757 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4758
4759 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4760 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4761
4762 /* Warn about any other mismatches. */
4763 if (new_flags != old_flags)
4764 {
4765 error = TRUE;
4766 (*_bfd_error_handler)
4767 (_("%B: uses different e_flags (0x%lx) fields "
4768 "than previous modules (0x%lx)"),
4769 ibfd, (long) new_flags, (long) old_flags);
4770 }
4771
4772 if (error)
4773 {
4774 bfd_set_error (bfd_error_bad_value);
4775 return FALSE;
4776 }
4777 }
4778
4779 return TRUE;
4780 }
4781
4782 static void
4783 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *contents,
4784 bfd_vma offset, bfd_vma relocation,
4785 split16_format_type split16_format)
4786
4787 {
4788 bfd_vma insn, top5, bottom11;
4789
4790 insn = bfd_get_32 (output_bfd, contents + offset);
4791 top5 = relocation >> 11;
4792 top5 = top5 << (split16_format == split16a_type ? 20 : 16);
4793 bottom11 = relocation & 0x7ff;
4794 insn |= top5;
4795 insn |= bottom11;
4796 bfd_put_32 (output_bfd, insn, contents + offset);
4797 }
4798
4799 \f
4800 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4801 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4802 int
4803 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4804 struct bfd_link_info *info,
4805 enum ppc_elf_plt_type plt_style,
4806 int emit_stub_syms)
4807 {
4808 struct ppc_elf_link_hash_table *htab;
4809 flagword flags;
4810
4811 htab = ppc_elf_hash_table (info);
4812
4813 htab->emit_stub_syms = emit_stub_syms;
4814
4815 if (htab->plt_type == PLT_UNSET)
4816 {
4817 struct elf_link_hash_entry *h;
4818
4819 if (plt_style == PLT_OLD)
4820 htab->plt_type = PLT_OLD;
4821 else if (info->shared
4822 && htab->elf.dynamic_sections_created
4823 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4824 FALSE, FALSE, TRUE)) != NULL
4825 && (h->type == STT_FUNC
4826 || h->needs_plt)
4827 && h->ref_regular
4828 && !(SYMBOL_CALLS_LOCAL (info, h)
4829 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4830 && h->root.type == bfd_link_hash_undefweak)))
4831 {
4832 /* Profiling of shared libs (and pies) is not supported with
4833 secure plt, because ppc32 does profiling before a
4834 function prologue and a secure plt pic call stubs needs
4835 r30 to be set up. */
4836 htab->plt_type = PLT_OLD;
4837 }
4838 else
4839 {
4840 bfd *ibfd;
4841 enum ppc_elf_plt_type plt_type = plt_style;
4842
4843 /* Look through the reloc flags left by ppc_elf_check_relocs.
4844 Use the old style bss plt if a file makes plt calls
4845 without using the new relocs, and if ld isn't given
4846 --secure-plt and we never see REL16 relocs. */
4847 if (plt_type == PLT_UNSET)
4848 plt_type = PLT_OLD;
4849 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4850 if (is_ppc_elf (ibfd))
4851 {
4852 if (ppc_elf_tdata (ibfd)->has_rel16)
4853 plt_type = PLT_NEW;
4854 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4855 {
4856 plt_type = PLT_OLD;
4857 htab->old_bfd = ibfd;
4858 break;
4859 }
4860 }
4861 htab->plt_type = plt_type;
4862 }
4863 }
4864 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4865 {
4866 if (htab->old_bfd != NULL)
4867 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4868 htab->old_bfd);
4869 else
4870 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4871 }
4872
4873 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4874
4875 if (htab->plt_type == PLT_NEW)
4876 {
4877 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4878 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4879
4880 /* The new PLT is a loaded section. */
4881 if (htab->plt != NULL
4882 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4883 return -1;
4884
4885 /* The new GOT is not executable. */
4886 if (htab->got != NULL
4887 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4888 return -1;
4889 }
4890 else
4891 {
4892 /* Stop an unused .glink section from affecting .text alignment. */
4893 if (htab->glink != NULL
4894 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4895 return -1;
4896 }
4897 return htab->plt_type == PLT_NEW;
4898 }
4899 \f
4900 /* Return the section that should be marked against GC for a given
4901 relocation. */
4902
4903 static asection *
4904 ppc_elf_gc_mark_hook (asection *sec,
4905 struct bfd_link_info *info,
4906 Elf_Internal_Rela *rel,
4907 struct elf_link_hash_entry *h,
4908 Elf_Internal_Sym *sym)
4909 {
4910 if (h != NULL)
4911 switch (ELF32_R_TYPE (rel->r_info))
4912 {
4913 case R_PPC_GNU_VTINHERIT:
4914 case R_PPC_GNU_VTENTRY:
4915 return NULL;
4916 }
4917
4918 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4919 }
4920
4921 /* Update the got, plt and dynamic reloc reference counts for the
4922 section being removed. */
4923
4924 static bfd_boolean
4925 ppc_elf_gc_sweep_hook (bfd *abfd,
4926 struct bfd_link_info *info,
4927 asection *sec,
4928 const Elf_Internal_Rela *relocs)
4929 {
4930 struct ppc_elf_link_hash_table *htab;
4931 Elf_Internal_Shdr *symtab_hdr;
4932 struct elf_link_hash_entry **sym_hashes;
4933 bfd_signed_vma *local_got_refcounts;
4934 const Elf_Internal_Rela *rel, *relend;
4935 asection *got2;
4936
4937 if (info->relocatable)
4938 return TRUE;
4939
4940 if ((sec->flags & SEC_ALLOC) == 0)
4941 return TRUE;
4942
4943 elf_section_data (sec)->local_dynrel = NULL;
4944
4945 htab = ppc_elf_hash_table (info);
4946 symtab_hdr = &elf_symtab_hdr (abfd);
4947 sym_hashes = elf_sym_hashes (abfd);
4948 local_got_refcounts = elf_local_got_refcounts (abfd);
4949 got2 = bfd_get_section_by_name (abfd, ".got2");
4950
4951 relend = relocs + sec->reloc_count;
4952 for (rel = relocs; rel < relend; rel++)
4953 {
4954 unsigned long r_symndx;
4955 enum elf_ppc_reloc_type r_type;
4956 struct elf_link_hash_entry *h = NULL;
4957
4958 r_symndx = ELF32_R_SYM (rel->r_info);
4959 if (r_symndx >= symtab_hdr->sh_info)
4960 {
4961 struct elf_dyn_relocs **pp, *p;
4962 struct ppc_elf_link_hash_entry *eh;
4963
4964 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4965 while (h->root.type == bfd_link_hash_indirect
4966 || h->root.type == bfd_link_hash_warning)
4967 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4968 eh = (struct ppc_elf_link_hash_entry *) h;
4969
4970 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4971 if (p->sec == sec)
4972 {
4973 /* Everything must go for SEC. */
4974 *pp = p->next;
4975 break;
4976 }
4977 }
4978
4979 r_type = ELF32_R_TYPE (rel->r_info);
4980 if (!htab->is_vxworks
4981 && h == NULL
4982 && local_got_refcounts != NULL
4983 && (!info->shared
4984 || is_branch_reloc (r_type)))
4985 {
4986 struct plt_entry **local_plt = (struct plt_entry **)
4987 (local_got_refcounts + symtab_hdr->sh_info);
4988 char *local_got_tls_masks = (char *)
4989 (local_plt + symtab_hdr->sh_info);
4990 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4991 {
4992 struct plt_entry **ifunc = local_plt + r_symndx;
4993 bfd_vma addend = 0;
4994 struct plt_entry *ent;
4995
4996 if (r_type == R_PPC_PLTREL24 && info->shared)
4997 addend = rel->r_addend;
4998 ent = find_plt_ent (ifunc, got2, addend);
4999 if (ent->plt.refcount > 0)
5000 ent->plt.refcount -= 1;
5001 continue;
5002 }
5003 }
5004
5005 switch (r_type)
5006 {
5007 case R_PPC_GOT_TLSLD16:
5008 case R_PPC_GOT_TLSLD16_LO:
5009 case R_PPC_GOT_TLSLD16_HI:
5010 case R_PPC_GOT_TLSLD16_HA:
5011 case R_PPC_GOT_TLSGD16:
5012 case R_PPC_GOT_TLSGD16_LO:
5013 case R_PPC_GOT_TLSGD16_HI:
5014 case R_PPC_GOT_TLSGD16_HA:
5015 case R_PPC_GOT_TPREL16:
5016 case R_PPC_GOT_TPREL16_LO:
5017 case R_PPC_GOT_TPREL16_HI:
5018 case R_PPC_GOT_TPREL16_HA:
5019 case R_PPC_GOT_DTPREL16:
5020 case R_PPC_GOT_DTPREL16_LO:
5021 case R_PPC_GOT_DTPREL16_HI:
5022 case R_PPC_GOT_DTPREL16_HA:
5023 case R_PPC_GOT16:
5024 case R_PPC_GOT16_LO:
5025 case R_PPC_GOT16_HI:
5026 case R_PPC_GOT16_HA:
5027 if (h != NULL)
5028 {
5029 if (h->got.refcount > 0)
5030 h->got.refcount--;
5031 if (!info->shared)
5032 {
5033 struct plt_entry *ent;
5034
5035 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5036 if (ent != NULL && ent->plt.refcount > 0)
5037 ent->plt.refcount -= 1;
5038 }
5039 }
5040 else if (local_got_refcounts != NULL)
5041 {
5042 if (local_got_refcounts[r_symndx] > 0)
5043 local_got_refcounts[r_symndx]--;
5044 }
5045 break;
5046
5047 case R_PPC_REL24:
5048 case R_PPC_REL14:
5049 case R_PPC_REL14_BRTAKEN:
5050 case R_PPC_REL14_BRNTAKEN:
5051 case R_PPC_REL32:
5052 if (h == NULL || h == htab->elf.hgot)
5053 break;
5054 /* Fall thru */
5055
5056 case R_PPC_ADDR32:
5057 case R_PPC_ADDR24:
5058 case R_PPC_ADDR16:
5059 case R_PPC_ADDR16_LO:
5060 case R_PPC_ADDR16_HI:
5061 case R_PPC_ADDR16_HA:
5062 case R_PPC_ADDR14:
5063 case R_PPC_ADDR14_BRTAKEN:
5064 case R_PPC_ADDR14_BRNTAKEN:
5065 case R_PPC_UADDR32:
5066 case R_PPC_UADDR16:
5067 if (info->shared)
5068 break;
5069
5070 case R_PPC_PLT32:
5071 case R_PPC_PLTREL24:
5072 case R_PPC_PLTREL32:
5073 case R_PPC_PLT16_LO:
5074 case R_PPC_PLT16_HI:
5075 case R_PPC_PLT16_HA:
5076 if (h != NULL)
5077 {
5078 bfd_vma addend = 0;
5079 struct plt_entry *ent;
5080
5081 if (r_type == R_PPC_PLTREL24 && info->shared)
5082 addend = rel->r_addend;
5083 ent = find_plt_ent (&h->plt.plist, got2, addend);
5084 if (ent != NULL && ent->plt.refcount > 0)
5085 ent->plt.refcount -= 1;
5086 }
5087 break;
5088
5089 default:
5090 break;
5091 }
5092 }
5093 return TRUE;
5094 }
5095 \f
5096 /* Set plt output section type, htab->tls_get_addr, and call the
5097 generic ELF tls_setup function. */
5098
5099 asection *
5100 ppc_elf_tls_setup (bfd *obfd,
5101 struct bfd_link_info *info,
5102 int no_tls_get_addr_opt)
5103 {
5104 struct ppc_elf_link_hash_table *htab;
5105
5106 htab = ppc_elf_hash_table (info);
5107 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5108 FALSE, FALSE, TRUE);
5109 if (!no_tls_get_addr_opt)
5110 {
5111 struct elf_link_hash_entry *opt, *tga;
5112 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5113 FALSE, FALSE, TRUE);
5114 if (opt != NULL
5115 && (opt->root.type == bfd_link_hash_defined
5116 || opt->root.type == bfd_link_hash_defweak))
5117 {
5118 /* If glibc supports an optimized __tls_get_addr call stub,
5119 signalled by the presence of __tls_get_addr_opt, and we'll
5120 be calling __tls_get_addr via a plt call stub, then
5121 make __tls_get_addr point to __tls_get_addr_opt. */
5122 tga = htab->tls_get_addr;
5123 if (htab->elf.dynamic_sections_created
5124 && tga != NULL
5125 && (tga->type == STT_FUNC
5126 || tga->needs_plt)
5127 && !(SYMBOL_CALLS_LOCAL (info, tga)
5128 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5129 && tga->root.type == bfd_link_hash_undefweak)))
5130 {
5131 struct plt_entry *ent;
5132 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5133 if (ent->plt.refcount > 0)
5134 break;
5135 if (ent != NULL)
5136 {
5137 tga->root.type = bfd_link_hash_indirect;
5138 tga->root.u.i.link = &opt->root;
5139 ppc_elf_copy_indirect_symbol (info, opt, tga);
5140 if (opt->dynindx != -1)
5141 {
5142 /* Use __tls_get_addr_opt in dynamic relocations. */
5143 opt->dynindx = -1;
5144 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5145 opt->dynstr_index);
5146 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5147 return FALSE;
5148 }
5149 htab->tls_get_addr = opt;
5150 }
5151 }
5152 }
5153 else
5154 no_tls_get_addr_opt = TRUE;
5155 }
5156 htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
5157 if (htab->plt_type == PLT_NEW
5158 && htab->plt != NULL
5159 && htab->plt->output_section != NULL)
5160 {
5161 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5162 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5163 }
5164
5165 return _bfd_elf_tls_setup (obfd, info);
5166 }
5167
5168 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5169 HASH. */
5170
5171 static bfd_boolean
5172 branch_reloc_hash_match (const bfd *ibfd,
5173 const Elf_Internal_Rela *rel,
5174 const struct elf_link_hash_entry *hash)
5175 {
5176 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5177 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5178 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5179
5180 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5181 {
5182 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5183 struct elf_link_hash_entry *h;
5184
5185 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5186 while (h->root.type == bfd_link_hash_indirect
5187 || h->root.type == bfd_link_hash_warning)
5188 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5189 if (h == hash)
5190 return TRUE;
5191 }
5192 return FALSE;
5193 }
5194
5195 /* Run through all the TLS relocs looking for optimization
5196 opportunities. */
5197
5198 bfd_boolean
5199 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5200 struct bfd_link_info *info)
5201 {
5202 bfd *ibfd;
5203 asection *sec;
5204 struct ppc_elf_link_hash_table *htab;
5205 int pass;
5206
5207 if (info->relocatable || !info->executable)
5208 return TRUE;
5209
5210 htab = ppc_elf_hash_table (info);
5211 if (htab == NULL)
5212 return FALSE;
5213
5214 /* Make two passes through the relocs. First time check that tls
5215 relocs involved in setting up a tls_get_addr call are indeed
5216 followed by such a call. If they are not, don't do any tls
5217 optimization. On the second pass twiddle tls_mask flags to
5218 notify relocate_section that optimization can be done, and
5219 adjust got and plt refcounts. */
5220 for (pass = 0; pass < 2; ++pass)
5221 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5222 {
5223 Elf_Internal_Sym *locsyms = NULL;
5224 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5225 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5226
5227 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5228 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5229 {
5230 Elf_Internal_Rela *relstart, *rel, *relend;
5231 int expecting_tls_get_addr = 0;
5232
5233 /* Read the relocations. */
5234 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5235 info->keep_memory);
5236 if (relstart == NULL)
5237 return FALSE;
5238
5239 relend = relstart + sec->reloc_count;
5240 for (rel = relstart; rel < relend; rel++)
5241 {
5242 enum elf_ppc_reloc_type r_type;
5243 unsigned long r_symndx;
5244 struct elf_link_hash_entry *h = NULL;
5245 char *tls_mask;
5246 char tls_set, tls_clear;
5247 bfd_boolean is_local;
5248 bfd_signed_vma *got_count;
5249
5250 r_symndx = ELF32_R_SYM (rel->r_info);
5251 if (r_symndx >= symtab_hdr->sh_info)
5252 {
5253 struct elf_link_hash_entry **sym_hashes;
5254
5255 sym_hashes = elf_sym_hashes (ibfd);
5256 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5257 while (h->root.type == bfd_link_hash_indirect
5258 || h->root.type == bfd_link_hash_warning)
5259 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5260 }
5261
5262 is_local = FALSE;
5263 if (h == NULL
5264 || !h->def_dynamic)
5265 is_local = TRUE;
5266
5267 r_type = ELF32_R_TYPE (rel->r_info);
5268 /* If this section has old-style __tls_get_addr calls
5269 without marker relocs, then check that each
5270 __tls_get_addr call reloc is preceded by a reloc
5271 that conceivably belongs to the __tls_get_addr arg
5272 setup insn. If we don't find matching arg setup
5273 relocs, don't do any tls optimization. */
5274 if (pass == 0
5275 && sec->has_tls_get_addr_call
5276 && h != NULL
5277 && h == htab->tls_get_addr
5278 && !expecting_tls_get_addr
5279 && is_branch_reloc (r_type))
5280 {
5281 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5282 "TLS optimization disabled\n",
5283 ibfd, sec, rel->r_offset);
5284 if (elf_section_data (sec)->relocs != relstart)
5285 free (relstart);
5286 return TRUE;
5287 }
5288
5289 expecting_tls_get_addr = 0;
5290 switch (r_type)
5291 {
5292 case R_PPC_GOT_TLSLD16:
5293 case R_PPC_GOT_TLSLD16_LO:
5294 expecting_tls_get_addr = 1;
5295 /* Fall thru */
5296
5297 case R_PPC_GOT_TLSLD16_HI:
5298 case R_PPC_GOT_TLSLD16_HA:
5299 /* These relocs should never be against a symbol
5300 defined in a shared lib. Leave them alone if
5301 that turns out to be the case. */
5302 if (!is_local)
5303 continue;
5304
5305 /* LD -> LE */
5306 tls_set = 0;
5307 tls_clear = TLS_LD;
5308 break;
5309
5310 case R_PPC_GOT_TLSGD16:
5311 case R_PPC_GOT_TLSGD16_LO:
5312 expecting_tls_get_addr = 1;
5313 /* Fall thru */
5314
5315 case R_PPC_GOT_TLSGD16_HI:
5316 case R_PPC_GOT_TLSGD16_HA:
5317 if (is_local)
5318 /* GD -> LE */
5319 tls_set = 0;
5320 else
5321 /* GD -> IE */
5322 tls_set = TLS_TLS | TLS_TPRELGD;
5323 tls_clear = TLS_GD;
5324 break;
5325
5326 case R_PPC_GOT_TPREL16:
5327 case R_PPC_GOT_TPREL16_LO:
5328 case R_PPC_GOT_TPREL16_HI:
5329 case R_PPC_GOT_TPREL16_HA:
5330 if (is_local)
5331 {
5332 /* IE -> LE */
5333 tls_set = 0;
5334 tls_clear = TLS_TPREL;
5335 break;
5336 }
5337 else
5338 continue;
5339
5340 case R_PPC_TLSGD:
5341 case R_PPC_TLSLD:
5342 expecting_tls_get_addr = 2;
5343 tls_set = 0;
5344 tls_clear = 0;
5345 break;
5346
5347 default:
5348 continue;
5349 }
5350
5351 if (pass == 0)
5352 {
5353 if (!expecting_tls_get_addr
5354 || (expecting_tls_get_addr == 1
5355 && !sec->has_tls_get_addr_call))
5356 continue;
5357
5358 if (rel + 1 < relend
5359 && branch_reloc_hash_match (ibfd, rel + 1,
5360 htab->tls_get_addr))
5361 continue;
5362
5363 /* Uh oh, we didn't find the expected call. We
5364 could just mark this symbol to exclude it
5365 from tls optimization but it's safer to skip
5366 the entire optimization. */
5367 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5368 "TLS optimization disabled\n"),
5369 ibfd, sec, rel->r_offset);
5370 if (elf_section_data (sec)->relocs != relstart)
5371 free (relstart);
5372 return TRUE;
5373 }
5374
5375 if (expecting_tls_get_addr)
5376 {
5377 struct plt_entry *ent;
5378 bfd_vma addend = 0;
5379
5380 if (info->shared
5381 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5382 addend = rel[1].r_addend;
5383 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5384 got2, addend);
5385 if (ent != NULL && ent->plt.refcount > 0)
5386 ent->plt.refcount -= 1;
5387
5388 if (expecting_tls_get_addr == 2)
5389 continue;
5390 }
5391
5392 if (h != NULL)
5393 {
5394 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5395 got_count = &h->got.refcount;
5396 }
5397 else
5398 {
5399 bfd_signed_vma *lgot_refs;
5400 struct plt_entry **local_plt;
5401 char *lgot_masks;
5402
5403 if (locsyms == NULL)
5404 {
5405 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5406 if (locsyms == NULL)
5407 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5408 symtab_hdr->sh_info,
5409 0, NULL, NULL, NULL);
5410 if (locsyms == NULL)
5411 {
5412 if (elf_section_data (sec)->relocs != relstart)
5413 free (relstart);
5414 return FALSE;
5415 }
5416 }
5417 lgot_refs = elf_local_got_refcounts (ibfd);
5418 if (lgot_refs == NULL)
5419 abort ();
5420 local_plt = (struct plt_entry **)
5421 (lgot_refs + symtab_hdr->sh_info);
5422 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5423 tls_mask = &lgot_masks[r_symndx];
5424 got_count = &lgot_refs[r_symndx];
5425 }
5426
5427 if (tls_set == 0)
5428 {
5429 /* We managed to get rid of a got entry. */
5430 if (*got_count > 0)
5431 *got_count -= 1;
5432 }
5433
5434 *tls_mask |= tls_set;
5435 *tls_mask &= ~tls_clear;
5436 }
5437
5438 if (elf_section_data (sec)->relocs != relstart)
5439 free (relstart);
5440 }
5441
5442 if (locsyms != NULL
5443 && (symtab_hdr->contents != (unsigned char *) locsyms))
5444 {
5445 if (!info->keep_memory)
5446 free (locsyms);
5447 else
5448 symtab_hdr->contents = (unsigned char *) locsyms;
5449 }
5450 }
5451 return TRUE;
5452 }
5453 \f
5454 /* Return true if we have dynamic relocs that apply to read-only sections. */
5455
5456 static bfd_boolean
5457 readonly_dynrelocs (struct elf_link_hash_entry *h)
5458 {
5459 struct elf_dyn_relocs *p;
5460
5461 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5462 {
5463 asection *s = p->sec->output_section;
5464
5465 if (s != NULL
5466 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5467 == (SEC_READONLY | SEC_ALLOC)))
5468 return TRUE;
5469 }
5470 return FALSE;
5471 }
5472
5473 /* Adjust a symbol defined by a dynamic object and referenced by a
5474 regular object. The current definition is in some section of the
5475 dynamic object, but we're not including those sections. We have to
5476 change the definition to something the rest of the link can
5477 understand. */
5478
5479 static bfd_boolean
5480 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5481 struct elf_link_hash_entry *h)
5482 {
5483 struct ppc_elf_link_hash_table *htab;
5484 asection *s;
5485
5486 #ifdef DEBUG
5487 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5488 h->root.root.string);
5489 #endif
5490
5491 /* Make sure we know what is going on here. */
5492 htab = ppc_elf_hash_table (info);
5493 BFD_ASSERT (htab->elf.dynobj != NULL
5494 && (h->needs_plt
5495 || h->type == STT_GNU_IFUNC
5496 || h->u.weakdef != NULL
5497 || (h->def_dynamic
5498 && h->ref_regular
5499 && !h->def_regular)));
5500
5501 /* Deal with function syms. */
5502 if (h->type == STT_FUNC
5503 || h->type == STT_GNU_IFUNC
5504 || h->needs_plt)
5505 {
5506 /* Clear procedure linkage table information for any symbol that
5507 won't need a .plt entry. */
5508 struct plt_entry *ent;
5509 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5510 if (ent->plt.refcount > 0)
5511 break;
5512 if (ent == NULL
5513 || (h->type != STT_GNU_IFUNC
5514 && (SYMBOL_CALLS_LOCAL (info, h)
5515 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5516 && h->root.type == bfd_link_hash_undefweak))))
5517 {
5518 /* A PLT entry is not required/allowed when:
5519
5520 1. We are not using ld.so; because then the PLT entry
5521 can't be set up, so we can't use one. In this case,
5522 ppc_elf_adjust_dynamic_symbol won't even be called.
5523
5524 2. GC has rendered the entry unused.
5525
5526 3. We know for certain that a call to this symbol
5527 will go to this object, or will remain undefined. */
5528 h->plt.plist = NULL;
5529 h->needs_plt = 0;
5530 }
5531 else
5532 {
5533 /* After adjust_dynamic_symbol, non_got_ref set in the
5534 non-shared case means that we have allocated space in
5535 .dynbss for the symbol and thus dyn_relocs for this
5536 symbol should be discarded.
5537 If we get here we know we are making a PLT entry for this
5538 symbol, and in an executable we'd normally resolve
5539 relocations against this symbol to the PLT entry. Allow
5540 dynamic relocs if the reference is weak, and the dynamic
5541 relocs will not cause text relocation. */
5542 if (!h->ref_regular_nonweak
5543 && h->non_got_ref
5544 && h->type != STT_GNU_IFUNC
5545 && !htab->is_vxworks
5546 && !ppc_elf_hash_entry (h)->has_sda_refs
5547 && !readonly_dynrelocs (h))
5548 h->non_got_ref = 0;
5549 }
5550 return TRUE;
5551 }
5552 else
5553 h->plt.plist = NULL;
5554
5555 /* If this is a weak symbol, and there is a real definition, the
5556 processor independent code will have arranged for us to see the
5557 real definition first, and we can just use the same value. */
5558 if (h->u.weakdef != NULL)
5559 {
5560 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5561 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5562 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5563 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5564 if (ELIMINATE_COPY_RELOCS)
5565 h->non_got_ref = h->u.weakdef->non_got_ref;
5566 return TRUE;
5567 }
5568
5569 /* This is a reference to a symbol defined by a dynamic object which
5570 is not a function. */
5571
5572 /* If we are creating a shared library, we must presume that the
5573 only references to the symbol are via the global offset table.
5574 For such cases we need not do anything here; the relocations will
5575 be handled correctly by relocate_section. */
5576 if (info->shared)
5577 return TRUE;
5578
5579 /* If there are no references to this symbol that do not use the
5580 GOT, we don't need to generate a copy reloc. */
5581 if (!h->non_got_ref)
5582 return TRUE;
5583
5584 /* If we didn't find any dynamic relocs in read-only sections, then
5585 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5586 We can't do this if there are any small data relocations. This
5587 doesn't work on VxWorks, where we can not have dynamic
5588 relocations (other than copy and jump slot relocations) in an
5589 executable. */
5590 if (ELIMINATE_COPY_RELOCS
5591 && !ppc_elf_hash_entry (h)->has_sda_refs
5592 && !htab->is_vxworks
5593 && !h->def_regular
5594 && !readonly_dynrelocs (h))
5595 {
5596 h->non_got_ref = 0;
5597 return TRUE;
5598 }
5599
5600 /* We must allocate the symbol in our .dynbss section, which will
5601 become part of the .bss section of the executable. There will be
5602 an entry for this symbol in the .dynsym section. The dynamic
5603 object will contain position independent code, so all references
5604 from the dynamic object to this symbol will go through the global
5605 offset table. The dynamic linker will use the .dynsym entry to
5606 determine the address it must put in the global offset table, so
5607 both the dynamic object and the regular object will refer to the
5608 same memory location for the variable.
5609
5610 Of course, if the symbol is referenced using SDAREL relocs, we
5611 must instead allocate it in .sbss. */
5612
5613 if (ppc_elf_hash_entry (h)->has_sda_refs)
5614 s = htab->dynsbss;
5615 else
5616 s = htab->dynbss;
5617 BFD_ASSERT (s != NULL);
5618
5619 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5620 copy the initial value out of the dynamic object and into the
5621 runtime process image. We need to remember the offset into the
5622 .rela.bss section we are going to use. */
5623 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5624 {
5625 asection *srel;
5626
5627 if (ppc_elf_hash_entry (h)->has_sda_refs)
5628 srel = htab->relsbss;
5629 else
5630 srel = htab->relbss;
5631 BFD_ASSERT (srel != NULL);
5632 srel->size += sizeof (Elf32_External_Rela);
5633 h->needs_copy = 1;
5634 }
5635
5636 return _bfd_elf_adjust_dynamic_copy (h, s);
5637 }
5638 \f
5639 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5640 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5641 specifying the addend on the plt relocation. For -fpic code, the sym
5642 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5643 xxxxxxxx.got2.plt_pic32.<callee>. */
5644
5645 static bfd_boolean
5646 add_stub_sym (struct plt_entry *ent,
5647 struct elf_link_hash_entry *h,
5648 struct bfd_link_info *info)
5649 {
5650 struct elf_link_hash_entry *sh;
5651 size_t len1, len2, len3;
5652 char *name;
5653 const char *stub;
5654 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5655
5656 if (info->shared)
5657 stub = ".plt_pic32.";
5658 else
5659 stub = ".plt_call32.";
5660
5661 len1 = strlen (h->root.root.string);
5662 len2 = strlen (stub);
5663 len3 = 0;
5664 if (ent->sec)
5665 len3 = strlen (ent->sec->name);
5666 name = bfd_malloc (len1 + len2 + len3 + 9);
5667 if (name == NULL)
5668 return FALSE;
5669 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5670 if (ent->sec)
5671 memcpy (name + 8, ent->sec->name, len3);
5672 memcpy (name + 8 + len3, stub, len2);
5673 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5674 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5675 if (sh == NULL)
5676 return FALSE;
5677 if (sh->root.type == bfd_link_hash_new)
5678 {
5679 sh->root.type = bfd_link_hash_defined;
5680 sh->root.u.def.section = htab->glink;
5681 sh->root.u.def.value = ent->glink_offset;
5682 sh->ref_regular = 1;
5683 sh->def_regular = 1;
5684 sh->ref_regular_nonweak = 1;
5685 sh->forced_local = 1;
5686 sh->non_elf = 0;
5687 }
5688 return TRUE;
5689 }
5690
5691 /* Allocate NEED contiguous space in .got, and return the offset.
5692 Handles allocation of the got header when crossing 32k. */
5693
5694 static bfd_vma
5695 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5696 {
5697 bfd_vma where;
5698 unsigned int max_before_header;
5699
5700 if (htab->plt_type == PLT_VXWORKS)
5701 {
5702 where = htab->got->size;
5703 htab->got->size += need;
5704 }
5705 else
5706 {
5707 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5708 if (need <= htab->got_gap)
5709 {
5710 where = max_before_header - htab->got_gap;
5711 htab->got_gap -= need;
5712 }
5713 else
5714 {
5715 if (htab->got->size + need > max_before_header
5716 && htab->got->size <= max_before_header)
5717 {
5718 htab->got_gap = max_before_header - htab->got->size;
5719 htab->got->size = max_before_header + htab->got_header_size;
5720 }
5721 where = htab->got->size;
5722 htab->got->size += need;
5723 }
5724 }
5725 return where;
5726 }
5727
5728 /* Allocate space in associated reloc sections for dynamic relocs. */
5729
5730 static bfd_boolean
5731 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5732 {
5733 struct bfd_link_info *info = inf;
5734 struct ppc_elf_link_hash_entry *eh;
5735 struct ppc_elf_link_hash_table *htab;
5736 struct elf_dyn_relocs *p;
5737
5738 if (h->root.type == bfd_link_hash_indirect)
5739 return TRUE;
5740
5741 htab = ppc_elf_hash_table (info);
5742 if (htab->elf.dynamic_sections_created
5743 || h->type == STT_GNU_IFUNC)
5744 {
5745 struct plt_entry *ent;
5746 bfd_boolean doneone = FALSE;
5747 bfd_vma plt_offset = 0, glink_offset = 0;
5748 bfd_boolean dyn;
5749
5750 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5751 if (ent->plt.refcount > 0)
5752 {
5753 /* Make sure this symbol is output as a dynamic symbol. */
5754 if (h->dynindx == -1
5755 && !h->forced_local
5756 && !h->def_regular
5757 && htab->elf.dynamic_sections_created)
5758 {
5759 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5760 return FALSE;
5761 }
5762
5763 dyn = htab->elf.dynamic_sections_created;
5764 if (info->shared
5765 || h->type == STT_GNU_IFUNC
5766 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5767 {
5768 asection *s = htab->plt;
5769 if (!dyn || h->dynindx == -1)
5770 s = htab->iplt;
5771
5772 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5773 {
5774 if (!doneone)
5775 {
5776 plt_offset = s->size;
5777 s->size += 4;
5778 }
5779 ent->plt.offset = plt_offset;
5780
5781 s = htab->glink;
5782 if (!doneone || info->shared)
5783 {
5784 glink_offset = s->size;
5785 s->size += GLINK_ENTRY_SIZE;
5786 if (h == htab->tls_get_addr
5787 && !htab->no_tls_get_addr_opt)
5788 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5789 }
5790 if (!doneone
5791 && !info->shared
5792 && h->def_dynamic
5793 && !h->def_regular)
5794 {
5795 h->root.u.def.section = s;
5796 h->root.u.def.value = glink_offset;
5797 }
5798 ent->glink_offset = glink_offset;
5799
5800 if (htab->emit_stub_syms
5801 && !add_stub_sym (ent, h, info))
5802 return FALSE;
5803 }
5804 else
5805 {
5806 if (!doneone)
5807 {
5808 /* If this is the first .plt entry, make room
5809 for the special first entry. */
5810 if (s->size == 0)
5811 s->size += htab->plt_initial_entry_size;
5812
5813 /* The PowerPC PLT is actually composed of two
5814 parts, the first part is 2 words (for a load
5815 and a jump), and then there is a remaining
5816 word available at the end. */
5817 plt_offset = (htab->plt_initial_entry_size
5818 + (htab->plt_slot_size
5819 * ((s->size
5820 - htab->plt_initial_entry_size)
5821 / htab->plt_entry_size)));
5822
5823 /* If this symbol is not defined in a regular
5824 file, and we are not generating a shared
5825 library, then set the symbol to this location
5826 in the .plt. This is to avoid text
5827 relocations, and is required to make
5828 function pointers compare as equal between
5829 the normal executable and the shared library. */
5830 if (! info->shared
5831 && h->def_dynamic
5832 && !h->def_regular)
5833 {
5834 h->root.u.def.section = s;
5835 h->root.u.def.value = plt_offset;
5836 }
5837
5838 /* Make room for this entry. */
5839 s->size += htab->plt_entry_size;
5840 /* After the 8192nd entry, room for two entries
5841 is allocated. */
5842 if (htab->plt_type == PLT_OLD
5843 && (s->size - htab->plt_initial_entry_size)
5844 / htab->plt_entry_size
5845 > PLT_NUM_SINGLE_ENTRIES)
5846 s->size += htab->plt_entry_size;
5847 }
5848 ent->plt.offset = plt_offset;
5849 }
5850
5851 /* We also need to make an entry in the .rela.plt section. */
5852 if (!doneone)
5853 {
5854 if (!htab->elf.dynamic_sections_created
5855 || h->dynindx == -1)
5856 htab->reliplt->size += sizeof (Elf32_External_Rela);
5857 else
5858 {
5859 htab->relplt->size += sizeof (Elf32_External_Rela);
5860
5861 if (htab->plt_type == PLT_VXWORKS)
5862 {
5863 /* Allocate space for the unloaded relocations. */
5864 if (!info->shared
5865 && htab->elf.dynamic_sections_created)
5866 {
5867 if (ent->plt.offset
5868 == (bfd_vma) htab->plt_initial_entry_size)
5869 {
5870 htab->srelplt2->size
5871 += (sizeof (Elf32_External_Rela)
5872 * VXWORKS_PLTRESOLVE_RELOCS);
5873 }
5874
5875 htab->srelplt2->size
5876 += (sizeof (Elf32_External_Rela)
5877 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5878 }
5879
5880 /* Every PLT entry has an associated GOT entry in
5881 .got.plt. */
5882 htab->sgotplt->size += 4;
5883 }
5884 }
5885 doneone = TRUE;
5886 }
5887 }
5888 else
5889 ent->plt.offset = (bfd_vma) -1;
5890 }
5891 else
5892 ent->plt.offset = (bfd_vma) -1;
5893
5894 if (!doneone)
5895 {
5896 h->plt.plist = NULL;
5897 h->needs_plt = 0;
5898 }
5899 }
5900 else
5901 {
5902 h->plt.plist = NULL;
5903 h->needs_plt = 0;
5904 }
5905
5906 eh = (struct ppc_elf_link_hash_entry *) h;
5907 if (eh->elf.got.refcount > 0)
5908 {
5909 bfd_boolean dyn;
5910 unsigned int need;
5911
5912 /* Make sure this symbol is output as a dynamic symbol. */
5913 if (eh->elf.dynindx == -1
5914 && !eh->elf.forced_local
5915 && eh->elf.type != STT_GNU_IFUNC
5916 && htab->elf.dynamic_sections_created)
5917 {
5918 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5919 return FALSE;
5920 }
5921
5922 need = 0;
5923 if ((eh->tls_mask & TLS_TLS) != 0)
5924 {
5925 if ((eh->tls_mask & TLS_LD) != 0)
5926 {
5927 if (!eh->elf.def_dynamic)
5928 /* We'll just use htab->tlsld_got.offset. This should
5929 always be the case. It's a little odd if we have
5930 a local dynamic reloc against a non-local symbol. */
5931 htab->tlsld_got.refcount += 1;
5932 else
5933 need += 8;
5934 }
5935 if ((eh->tls_mask & TLS_GD) != 0)
5936 need += 8;
5937 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5938 need += 4;
5939 if ((eh->tls_mask & TLS_DTPREL) != 0)
5940 need += 4;
5941 }
5942 else
5943 need += 4;
5944 if (need == 0)
5945 eh->elf.got.offset = (bfd_vma) -1;
5946 else
5947 {
5948 eh->elf.got.offset = allocate_got (htab, need);
5949 dyn = htab->elf.dynamic_sections_created;
5950 if ((info->shared
5951 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5952 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5953 || eh->elf.root.type != bfd_link_hash_undefweak))
5954 {
5955 asection *rsec = htab->relgot;
5956
5957 if (eh->elf.type == STT_GNU_IFUNC)
5958 rsec = htab->reliplt;
5959 /* All the entries we allocated need relocs.
5960 Except LD only needs one. */
5961 if ((eh->tls_mask & TLS_LD) != 0
5962 && eh->elf.def_dynamic)
5963 need -= 4;
5964 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5965 }
5966 }
5967 }
5968 else
5969 eh->elf.got.offset = (bfd_vma) -1;
5970
5971 if (eh->dyn_relocs == NULL
5972 || !htab->elf.dynamic_sections_created)
5973 return TRUE;
5974
5975 /* In the shared -Bsymbolic case, discard space allocated for
5976 dynamic pc-relative relocs against symbols which turn out to be
5977 defined in regular objects. For the normal shared case, discard
5978 space for relocs that have become local due to symbol visibility
5979 changes. */
5980
5981 if (info->shared)
5982 {
5983 /* Relocs that use pc_count are those that appear on a call insn,
5984 or certain REL relocs (see must_be_dyn_reloc) that can be
5985 generated via assembly. We want calls to protected symbols to
5986 resolve directly to the function rather than going via the plt.
5987 If people want function pointer comparisons to work as expected
5988 then they should avoid writing weird assembly. */
5989 if (SYMBOL_CALLS_LOCAL (info, h))
5990 {
5991 struct elf_dyn_relocs **pp;
5992
5993 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5994 {
5995 p->count -= p->pc_count;
5996 p->pc_count = 0;
5997 if (p->count == 0)
5998 *pp = p->next;
5999 else
6000 pp = &p->next;
6001 }
6002 }
6003
6004 if (htab->is_vxworks)
6005 {
6006 struct elf_dyn_relocs **pp;
6007
6008 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6009 {
6010 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6011 *pp = p->next;
6012 else
6013 pp = &p->next;
6014 }
6015 }
6016
6017 /* Discard relocs on undefined symbols that must be local. */
6018 if (eh->dyn_relocs != NULL
6019 && h->root.type == bfd_link_hash_undefined
6020 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6021 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6022 eh->dyn_relocs = NULL;
6023
6024 /* Also discard relocs on undefined weak syms with non-default
6025 visibility. */
6026 if (eh->dyn_relocs != NULL
6027 && h->root.type == bfd_link_hash_undefweak)
6028 {
6029 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6030 eh->dyn_relocs = NULL;
6031
6032 /* Make sure undefined weak symbols are output as a dynamic
6033 symbol in PIEs. */
6034 else if (h->dynindx == -1
6035 && !h->forced_local
6036 && !h->def_regular)
6037 {
6038 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6039 return FALSE;
6040 }
6041 }
6042 }
6043 else if (ELIMINATE_COPY_RELOCS)
6044 {
6045 /* For the non-shared case, discard space for relocs against
6046 symbols which turn out to need copy relocs or are not
6047 dynamic. */
6048
6049 if (!h->non_got_ref
6050 && !h->def_regular)
6051 {
6052 /* Make sure this symbol is output as a dynamic symbol.
6053 Undefined weak syms won't yet be marked as dynamic. */
6054 if (h->dynindx == -1
6055 && !h->forced_local)
6056 {
6057 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6058 return FALSE;
6059 }
6060
6061 /* If that succeeded, we know we'll be keeping all the
6062 relocs. */
6063 if (h->dynindx != -1)
6064 goto keep;
6065 }
6066
6067 eh->dyn_relocs = NULL;
6068
6069 keep: ;
6070 }
6071
6072 /* Finally, allocate space. */
6073 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6074 {
6075 asection *sreloc = elf_section_data (p->sec)->sreloc;
6076 if (eh->elf.type == STT_GNU_IFUNC)
6077 sreloc = htab->reliplt;
6078 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6079 }
6080
6081 return TRUE;
6082 }
6083
6084 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6085 read-only sections. */
6086
6087 static bfd_boolean
6088 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6089 {
6090 if (h->root.type == bfd_link_hash_indirect)
6091 return TRUE;
6092
6093 if (readonly_dynrelocs (h))
6094 {
6095 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6096
6097 /* Not an error, just cut short the traversal. */
6098 return FALSE;
6099 }
6100 return TRUE;
6101 }
6102
6103 static const unsigned char glink_eh_frame_cie[] =
6104 {
6105 0, 0, 0, 16, /* length. */
6106 0, 0, 0, 0, /* id. */
6107 1, /* CIE version. */
6108 'z', 'R', 0, /* Augmentation string. */
6109 4, /* Code alignment. */
6110 0x7c, /* Data alignment. */
6111 65, /* RA reg. */
6112 1, /* Augmentation size. */
6113 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6114 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6115 };
6116
6117 /* Set the sizes of the dynamic sections. */
6118
6119 static bfd_boolean
6120 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6121 struct bfd_link_info *info)
6122 {
6123 struct ppc_elf_link_hash_table *htab;
6124 asection *s;
6125 bfd_boolean relocs;
6126 bfd *ibfd;
6127
6128 #ifdef DEBUG
6129 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6130 #endif
6131
6132 htab = ppc_elf_hash_table (info);
6133 BFD_ASSERT (htab->elf.dynobj != NULL);
6134
6135 if (elf_hash_table (info)->dynamic_sections_created)
6136 {
6137 /* Set the contents of the .interp section to the interpreter. */
6138 if (info->executable)
6139 {
6140 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6141 BFD_ASSERT (s != NULL);
6142 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6143 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6144 }
6145 }
6146
6147 if (htab->plt_type == PLT_OLD)
6148 htab->got_header_size = 16;
6149 else if (htab->plt_type == PLT_NEW)
6150 htab->got_header_size = 12;
6151
6152 /* Set up .got offsets for local syms, and space for local dynamic
6153 relocs. */
6154 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6155 {
6156 bfd_signed_vma *local_got;
6157 bfd_signed_vma *end_local_got;
6158 struct plt_entry **local_plt;
6159 struct plt_entry **end_local_plt;
6160 char *lgot_masks;
6161 bfd_size_type locsymcount;
6162 Elf_Internal_Shdr *symtab_hdr;
6163
6164 if (!is_ppc_elf (ibfd))
6165 continue;
6166
6167 for (s = ibfd->sections; s != NULL; s = s->next)
6168 {
6169 struct ppc_dyn_relocs *p;
6170
6171 for (p = ((struct ppc_dyn_relocs *)
6172 elf_section_data (s)->local_dynrel);
6173 p != NULL;
6174 p = p->next)
6175 {
6176 if (!bfd_is_abs_section (p->sec)
6177 && bfd_is_abs_section (p->sec->output_section))
6178 {
6179 /* Input section has been discarded, either because
6180 it is a copy of a linkonce section or due to
6181 linker script /DISCARD/, so we'll be discarding
6182 the relocs too. */
6183 }
6184 else if (htab->is_vxworks
6185 && strcmp (p->sec->output_section->name,
6186 ".tls_vars") == 0)
6187 {
6188 /* Relocations in vxworks .tls_vars sections are
6189 handled specially by the loader. */
6190 }
6191 else if (p->count != 0)
6192 {
6193 asection *sreloc = elf_section_data (p->sec)->sreloc;
6194 if (p->ifunc)
6195 sreloc = htab->reliplt;
6196 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6197 if ((p->sec->output_section->flags
6198 & (SEC_READONLY | SEC_ALLOC))
6199 == (SEC_READONLY | SEC_ALLOC))
6200 info->flags |= DF_TEXTREL;
6201 }
6202 }
6203 }
6204
6205 local_got = elf_local_got_refcounts (ibfd);
6206 if (!local_got)
6207 continue;
6208
6209 symtab_hdr = &elf_symtab_hdr (ibfd);
6210 locsymcount = symtab_hdr->sh_info;
6211 end_local_got = local_got + locsymcount;
6212 local_plt = (struct plt_entry **) end_local_got;
6213 end_local_plt = local_plt + locsymcount;
6214 lgot_masks = (char *) end_local_plt;
6215
6216 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6217 if (*local_got > 0)
6218 {
6219 unsigned int need = 0;
6220 if ((*lgot_masks & TLS_TLS) != 0)
6221 {
6222 if ((*lgot_masks & TLS_GD) != 0)
6223 need += 8;
6224 if ((*lgot_masks & TLS_LD) != 0)
6225 htab->tlsld_got.refcount += 1;
6226 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6227 need += 4;
6228 if ((*lgot_masks & TLS_DTPREL) != 0)
6229 need += 4;
6230 }
6231 else
6232 need += 4;
6233 if (need == 0)
6234 *local_got = (bfd_vma) -1;
6235 else
6236 {
6237 *local_got = allocate_got (htab, need);
6238 if (info->shared)
6239 {
6240 asection *srel = htab->relgot;
6241 if ((*lgot_masks & PLT_IFUNC) != 0)
6242 srel = htab->reliplt;
6243 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6244 }
6245 }
6246 }
6247 else
6248 *local_got = (bfd_vma) -1;
6249
6250 if (htab->is_vxworks)
6251 continue;
6252
6253 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6254 for (; local_plt < end_local_plt; ++local_plt)
6255 {
6256 struct plt_entry *ent;
6257 bfd_boolean doneone = FALSE;
6258 bfd_vma plt_offset = 0, glink_offset = 0;
6259
6260 for (ent = *local_plt; ent != NULL; ent = ent->next)
6261 if (ent->plt.refcount > 0)
6262 {
6263 s = htab->iplt;
6264
6265 if (!doneone)
6266 {
6267 plt_offset = s->size;
6268 s->size += 4;
6269 }
6270 ent->plt.offset = plt_offset;
6271
6272 s = htab->glink;
6273 if (!doneone || info->shared)
6274 {
6275 glink_offset = s->size;
6276 s->size += GLINK_ENTRY_SIZE;
6277 }
6278 ent->glink_offset = glink_offset;
6279
6280 if (!doneone)
6281 {
6282 htab->reliplt->size += sizeof (Elf32_External_Rela);
6283 doneone = TRUE;
6284 }
6285 }
6286 else
6287 ent->plt.offset = (bfd_vma) -1;
6288 }
6289 }
6290
6291 /* Allocate space for global sym dynamic relocs. */
6292 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6293
6294 if (htab->tlsld_got.refcount > 0)
6295 {
6296 htab->tlsld_got.offset = allocate_got (htab, 8);
6297 if (info->shared)
6298 htab->relgot->size += sizeof (Elf32_External_Rela);
6299 }
6300 else
6301 htab->tlsld_got.offset = (bfd_vma) -1;
6302
6303 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6304 {
6305 unsigned int g_o_t = 32768;
6306
6307 /* If we haven't allocated the header, do so now. When we get here,
6308 for old plt/got the got size will be 0 to 32764 (not allocated),
6309 or 32780 to 65536 (header allocated). For new plt/got, the
6310 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6311 if (htab->got->size <= 32768)
6312 {
6313 g_o_t = htab->got->size;
6314 if (htab->plt_type == PLT_OLD)
6315 g_o_t += 4;
6316 htab->got->size += htab->got_header_size;
6317 }
6318
6319 htab->elf.hgot->root.u.def.value = g_o_t;
6320 }
6321 if (info->shared)
6322 {
6323 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6324 if (sda != NULL
6325 && !(sda->root.type == bfd_link_hash_defined
6326 || sda->root.type == bfd_link_hash_defweak))
6327 {
6328 sda->root.type = bfd_link_hash_defined;
6329 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6330 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6331 }
6332 }
6333
6334 if (htab->glink != NULL
6335 && htab->glink->size != 0
6336 && htab->elf.dynamic_sections_created)
6337 {
6338 htab->glink_pltresolve = htab->glink->size;
6339 /* Space for the branch table. */
6340 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6341 /* Pad out to align the start of PLTresolve. */
6342 htab->glink->size += -htab->glink->size & 15;
6343 htab->glink->size += GLINK_PLTRESOLVE;
6344
6345 if (htab->emit_stub_syms)
6346 {
6347 struct elf_link_hash_entry *sh;
6348 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6349 TRUE, FALSE, FALSE);
6350 if (sh == NULL)
6351 return FALSE;
6352 if (sh->root.type == bfd_link_hash_new)
6353 {
6354 sh->root.type = bfd_link_hash_defined;
6355 sh->root.u.def.section = htab->glink;
6356 sh->root.u.def.value = htab->glink_pltresolve;
6357 sh->ref_regular = 1;
6358 sh->def_regular = 1;
6359 sh->ref_regular_nonweak = 1;
6360 sh->forced_local = 1;
6361 sh->non_elf = 0;
6362 }
6363 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6364 TRUE, FALSE, FALSE);
6365 if (sh == NULL)
6366 return FALSE;
6367 if (sh->root.type == bfd_link_hash_new)
6368 {
6369 sh->root.type = bfd_link_hash_defined;
6370 sh->root.u.def.section = htab->glink;
6371 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6372 sh->ref_regular = 1;
6373 sh->def_regular = 1;
6374 sh->ref_regular_nonweak = 1;
6375 sh->forced_local = 1;
6376 sh->non_elf = 0;
6377 }
6378 }
6379 }
6380
6381 if (htab->glink != NULL
6382 && htab->glink->size != 0
6383 && htab->glink_eh_frame != NULL
6384 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6385 && _bfd_elf_eh_frame_present (info))
6386 {
6387 s = htab->glink_eh_frame;
6388 s->size = sizeof (glink_eh_frame_cie) + 20;
6389 if (info->shared)
6390 {
6391 s->size += 4;
6392 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6393 s->size += 4;
6394 }
6395 }
6396
6397 /* We've now determined the sizes of the various dynamic sections.
6398 Allocate memory for them. */
6399 relocs = FALSE;
6400 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6401 {
6402 bfd_boolean strip_section = TRUE;
6403
6404 if ((s->flags & SEC_LINKER_CREATED) == 0)
6405 continue;
6406
6407 if (s == htab->plt
6408 || s == htab->got)
6409 {
6410 /* We'd like to strip these sections if they aren't needed, but if
6411 we've exported dynamic symbols from them we must leave them.
6412 It's too late to tell BFD to get rid of the symbols. */
6413 if (htab->elf.hplt != NULL)
6414 strip_section = FALSE;
6415 /* Strip this section if we don't need it; see the
6416 comment below. */
6417 }
6418 else if (s == htab->iplt
6419 || s == htab->glink
6420 || s == htab->glink_eh_frame
6421 || s == htab->sgotplt
6422 || s == htab->sbss
6423 || s == htab->dynbss
6424 || s == htab->dynsbss
6425 || s == htab->sdata[0].section
6426 || s == htab->sdata[1].section)
6427 {
6428 /* Strip these too. */
6429 }
6430 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6431 ".rela"))
6432 {
6433 if (s->size != 0)
6434 {
6435 /* Remember whether there are any relocation sections. */
6436 relocs = TRUE;
6437
6438 /* We use the reloc_count field as a counter if we need
6439 to copy relocs into the output file. */
6440 s->reloc_count = 0;
6441 }
6442 }
6443 else
6444 {
6445 /* It's not one of our sections, so don't allocate space. */
6446 continue;
6447 }
6448
6449 if (s->size == 0 && strip_section)
6450 {
6451 /* If we don't need this section, strip it from the
6452 output file. This is mostly to handle .rela.bss and
6453 .rela.plt. We must create both sections in
6454 create_dynamic_sections, because they must be created
6455 before the linker maps input sections to output
6456 sections. The linker does that before
6457 adjust_dynamic_symbol is called, and it is that
6458 function which decides whether anything needs to go
6459 into these sections. */
6460 s->flags |= SEC_EXCLUDE;
6461 continue;
6462 }
6463
6464 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6465 continue;
6466
6467 /* Allocate memory for the section contents. */
6468 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6469 if (s->contents == NULL)
6470 return FALSE;
6471 }
6472
6473 if (htab->elf.dynamic_sections_created)
6474 {
6475 /* Add some entries to the .dynamic section. We fill in the
6476 values later, in ppc_elf_finish_dynamic_sections, but we
6477 must add the entries now so that we get the correct size for
6478 the .dynamic section. The DT_DEBUG entry is filled in by the
6479 dynamic linker and used by the debugger. */
6480 #define add_dynamic_entry(TAG, VAL) \
6481 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6482
6483 if (info->executable)
6484 {
6485 if (!add_dynamic_entry (DT_DEBUG, 0))
6486 return FALSE;
6487 }
6488
6489 if (htab->plt != NULL && htab->plt->size != 0)
6490 {
6491 if (!add_dynamic_entry (DT_PLTGOT, 0)
6492 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6493 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6494 || !add_dynamic_entry (DT_JMPREL, 0))
6495 return FALSE;
6496 }
6497
6498 if (htab->plt_type == PLT_NEW
6499 && htab->glink != NULL
6500 && htab->glink->size != 0)
6501 {
6502 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6503 return FALSE;
6504 if (!htab->no_tls_get_addr_opt
6505 && htab->tls_get_addr != NULL
6506 && htab->tls_get_addr->plt.plist != NULL
6507 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6508 return FALSE;
6509 }
6510
6511 if (relocs)
6512 {
6513 if (!add_dynamic_entry (DT_RELA, 0)
6514 || !add_dynamic_entry (DT_RELASZ, 0)
6515 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6516 return FALSE;
6517 }
6518
6519 /* If any dynamic relocs apply to a read-only section, then we
6520 need a DT_TEXTREL entry. */
6521 if ((info->flags & DF_TEXTREL) == 0)
6522 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6523 info);
6524
6525 if ((info->flags & DF_TEXTREL) != 0)
6526 {
6527 if (!add_dynamic_entry (DT_TEXTREL, 0))
6528 return FALSE;
6529 }
6530 if (htab->is_vxworks
6531 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6532 return FALSE;
6533 }
6534 #undef add_dynamic_entry
6535
6536 if (htab->glink_eh_frame != NULL
6537 && htab->glink_eh_frame->contents != NULL)
6538 {
6539 unsigned char *p = htab->glink_eh_frame->contents;
6540 bfd_vma val;
6541
6542 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6543 /* CIE length (rewrite in case little-endian). */
6544 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6545 p += sizeof (glink_eh_frame_cie);
6546 /* FDE length. */
6547 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6548 bfd_put_32 (htab->elf.dynobj, val, p);
6549 p += 4;
6550 /* CIE pointer. */
6551 val = p - htab->glink_eh_frame->contents;
6552 bfd_put_32 (htab->elf.dynobj, val, p);
6553 p += 4;
6554 /* Offset to .glink. Set later. */
6555 p += 4;
6556 /* .glink size. */
6557 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6558 p += 4;
6559 /* Augmentation. */
6560 p += 1;
6561
6562 if (info->shared
6563 && htab->elf.dynamic_sections_created)
6564 {
6565 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6566 if (adv < 64)
6567 *p++ = DW_CFA_advance_loc + adv;
6568 else if (adv < 256)
6569 {
6570 *p++ = DW_CFA_advance_loc1;
6571 *p++ = adv;
6572 }
6573 else if (adv < 65536)
6574 {
6575 *p++ = DW_CFA_advance_loc2;
6576 bfd_put_16 (htab->elf.dynobj, adv, p);
6577 p += 2;
6578 }
6579 else
6580 {
6581 *p++ = DW_CFA_advance_loc4;
6582 bfd_put_32 (htab->elf.dynobj, adv, p);
6583 p += 4;
6584 }
6585 *p++ = DW_CFA_register;
6586 *p++ = 65;
6587 p++;
6588 *p++ = DW_CFA_advance_loc + 4;
6589 *p++ = DW_CFA_restore_extended;
6590 *p++ = 65;
6591 }
6592 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6593 == htab->glink_eh_frame->size);
6594 }
6595
6596 return TRUE;
6597 }
6598
6599 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6600
6601 static bfd_boolean
6602 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6603 {
6604 if (h->plt.plist != NULL
6605 && !h->def_regular
6606 && (!h->pointer_equality_needed
6607 || !h->ref_regular_nonweak))
6608 return FALSE;
6609
6610 return _bfd_elf_hash_symbol (h);
6611 }
6612 \f
6613 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6614
6615 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6616 used for some functions that are allowed to break the ABI). */
6617 static const int shared_stub_entry[] =
6618 {
6619 0x7c0802a6, /* mflr 0 */
6620 0x429f0005, /* bcl 20, 31, .Lxxx */
6621 0x7d8802a6, /* mflr 12 */
6622 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6623 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
6624 0x7c0803a6, /* mtlr 0 */
6625 0x7d8903a6, /* mtctr 12 */
6626 0x4e800420, /* bctr */
6627 };
6628
6629 static const int stub_entry[] =
6630 {
6631 0x3d800000, /* lis 12,xxx@ha */
6632 0x398c0000, /* addi 12,12,xxx@l */
6633 0x7d8903a6, /* mtctr 12 */
6634 0x4e800420, /* bctr */
6635 };
6636
6637 static bfd_boolean
6638 ppc_elf_relax_section (bfd *abfd,
6639 asection *isec,
6640 struct bfd_link_info *link_info,
6641 bfd_boolean *again)
6642 {
6643 struct one_fixup
6644 {
6645 struct one_fixup *next;
6646 asection *tsec;
6647 /* Final link, can use the symbol offset. For a
6648 relocatable link we use the symbol's index. */
6649 bfd_vma toff;
6650 bfd_vma trampoff;
6651 };
6652
6653 Elf_Internal_Shdr *symtab_hdr;
6654 bfd_byte *contents = NULL;
6655 Elf_Internal_Sym *isymbuf = NULL;
6656 Elf_Internal_Rela *internal_relocs = NULL;
6657 Elf_Internal_Rela *irel, *irelend;
6658 struct one_fixup *fixups = NULL;
6659 unsigned changes = 0;
6660 struct ppc_elf_link_hash_table *htab;
6661 bfd_size_type trampoff;
6662 asection *got2;
6663 bfd_boolean maybe_pasted;
6664
6665 *again = FALSE;
6666
6667 /* Nothing to do if there are no relocations, and no need to do
6668 anything with non-alloc or non-code sections. */
6669 if ((isec->flags & SEC_ALLOC) == 0
6670 || (isec->flags & SEC_CODE) == 0
6671 || (isec->flags & SEC_RELOC) == 0
6672 || isec->reloc_count == 0)
6673 return TRUE;
6674
6675 /* We cannot represent the required PIC relocs in the output, so don't
6676 do anything. The linker doesn't support mixing -shared and -r
6677 anyway. */
6678 if (link_info->relocatable && link_info->shared)
6679 return TRUE;
6680
6681 trampoff = (isec->size + 3) & (bfd_vma) -4;
6682 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6683 || strcmp (isec->output_section->name, ".fini") == 0);
6684 /* Space for a branch around any trampolines. */
6685 if (maybe_pasted)
6686 trampoff += 4;
6687
6688 symtab_hdr = &elf_symtab_hdr (abfd);
6689
6690 /* Get a copy of the native relocations. */
6691 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6692 link_info->keep_memory);
6693 if (internal_relocs == NULL)
6694 goto error_return;
6695
6696 htab = ppc_elf_hash_table (link_info);
6697 got2 = bfd_get_section_by_name (abfd, ".got2");
6698
6699 irelend = internal_relocs + isec->reloc_count;
6700 for (irel = internal_relocs; irel < irelend; irel++)
6701 {
6702 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6703 bfd_vma toff, roff;
6704 asection *tsec;
6705 struct one_fixup *f;
6706 size_t insn_offset = 0;
6707 bfd_vma max_branch_offset, val;
6708 bfd_byte *hit_addr;
6709 unsigned long t0;
6710 struct elf_link_hash_entry *h;
6711 struct plt_entry **plist;
6712 unsigned char sym_type;
6713
6714 switch (r_type)
6715 {
6716 case R_PPC_REL24:
6717 case R_PPC_LOCAL24PC:
6718 case R_PPC_PLTREL24:
6719 max_branch_offset = 1 << 25;
6720 break;
6721
6722 case R_PPC_REL14:
6723 case R_PPC_REL14_BRTAKEN:
6724 case R_PPC_REL14_BRNTAKEN:
6725 max_branch_offset = 1 << 15;
6726 break;
6727
6728 default:
6729 continue;
6730 }
6731
6732 /* Get the value of the symbol referred to by the reloc. */
6733 h = NULL;
6734 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6735 {
6736 /* A local symbol. */
6737 Elf_Internal_Sym *isym;
6738
6739 /* Read this BFD's local symbols. */
6740 if (isymbuf == NULL)
6741 {
6742 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6743 if (isymbuf == NULL)
6744 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6745 symtab_hdr->sh_info, 0,
6746 NULL, NULL, NULL);
6747 if (isymbuf == 0)
6748 goto error_return;
6749 }
6750 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6751 if (isym->st_shndx == SHN_UNDEF)
6752 tsec = bfd_und_section_ptr;
6753 else if (isym->st_shndx == SHN_ABS)
6754 tsec = bfd_abs_section_ptr;
6755 else if (isym->st_shndx == SHN_COMMON)
6756 tsec = bfd_com_section_ptr;
6757 else
6758 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6759
6760 toff = isym->st_value;
6761 sym_type = ELF_ST_TYPE (isym->st_info);
6762 }
6763 else
6764 {
6765 /* Global symbol handling. */
6766 unsigned long indx;
6767
6768 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6769 h = elf_sym_hashes (abfd)[indx];
6770
6771 while (h->root.type == bfd_link_hash_indirect
6772 || h->root.type == bfd_link_hash_warning)
6773 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6774
6775 if (h->root.type == bfd_link_hash_defined
6776 || h->root.type == bfd_link_hash_defweak)
6777 {
6778 tsec = h->root.u.def.section;
6779 toff = h->root.u.def.value;
6780 }
6781 else if (h->root.type == bfd_link_hash_undefined
6782 || h->root.type == bfd_link_hash_undefweak)
6783 {
6784 tsec = bfd_und_section_ptr;
6785 toff = link_info->relocatable ? indx : 0;
6786 }
6787 else
6788 continue;
6789
6790 sym_type = h->type;
6791 }
6792
6793 /* The condition here under which we call find_plt_ent must
6794 match that in relocate_section. If we call find_plt_ent here
6795 but not in relocate_section, or vice versa, then the branch
6796 destination used here may be incorrect. */
6797 plist = NULL;
6798 if (h != NULL)
6799 {
6800 /* We know is_branch_reloc (r_type) is true. */
6801 if (h->type == STT_GNU_IFUNC
6802 || r_type == R_PPC_PLTREL24)
6803 plist = &h->plt.plist;
6804 }
6805 else if (sym_type == STT_GNU_IFUNC
6806 && elf_local_got_offsets (abfd) != NULL)
6807 {
6808 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6809 struct plt_entry **local_plt = (struct plt_entry **)
6810 (local_got_offsets + symtab_hdr->sh_info);
6811 plist = local_plt + ELF32_R_SYM (irel->r_info);
6812 }
6813 if (plist != NULL)
6814 {
6815 bfd_vma addend = 0;
6816 struct plt_entry *ent;
6817
6818 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6819 addend = irel->r_addend;
6820 ent = find_plt_ent (plist, got2, addend);
6821 if (ent != NULL)
6822 {
6823 if (htab->plt_type == PLT_NEW
6824 || h == NULL
6825 || !htab->elf.dynamic_sections_created
6826 || h->dynindx == -1)
6827 {
6828 tsec = htab->glink;
6829 toff = ent->glink_offset;
6830 }
6831 else
6832 {
6833 tsec = htab->plt;
6834 toff = ent->plt.offset;
6835 }
6836 }
6837 }
6838
6839 /* If the branch and target are in the same section, you have
6840 no hope of adding stubs. We'll error out later should the
6841 branch overflow. */
6842 if (tsec == isec)
6843 continue;
6844
6845 /* There probably isn't any reason to handle symbols in
6846 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6847 attribute for a code section, and we are only looking at
6848 branches. However, implement it correctly here as a
6849 reference for other target relax_section functions. */
6850 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6851 {
6852 /* At this stage in linking, no SEC_MERGE symbol has been
6853 adjusted, so all references to such symbols need to be
6854 passed through _bfd_merged_section_offset. (Later, in
6855 relocate_section, all SEC_MERGE symbols *except* for
6856 section symbols have been adjusted.)
6857
6858 gas may reduce relocations against symbols in SEC_MERGE
6859 sections to a relocation against the section symbol when
6860 the original addend was zero. When the reloc is against
6861 a section symbol we should include the addend in the
6862 offset passed to _bfd_merged_section_offset, since the
6863 location of interest is the original symbol. On the
6864 other hand, an access to "sym+addend" where "sym" is not
6865 a section symbol should not include the addend; Such an
6866 access is presumed to be an offset from "sym"; The
6867 location of interest is just "sym". */
6868 if (sym_type == STT_SECTION)
6869 toff += irel->r_addend;
6870
6871 toff = _bfd_merged_section_offset (abfd, &tsec,
6872 elf_section_data (tsec)->sec_info,
6873 toff);
6874
6875 if (sym_type != STT_SECTION)
6876 toff += irel->r_addend;
6877 }
6878 /* PLTREL24 addends are special. */
6879 else if (r_type != R_PPC_PLTREL24)
6880 toff += irel->r_addend;
6881
6882 /* Attempted -shared link of non-pic code loses. */
6883 if (tsec->output_section == NULL)
6884 continue;
6885
6886 roff = irel->r_offset;
6887
6888 /* If the branch is in range, no need to do anything. */
6889 if (tsec != bfd_und_section_ptr
6890 && (!link_info->relocatable
6891 /* A relocatable link may have sections moved during
6892 final link, so do not presume they remain in range. */
6893 || tsec->output_section == isec->output_section))
6894 {
6895 bfd_vma symaddr, reladdr;
6896
6897 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6898 reladdr = isec->output_section->vma + isec->output_offset + roff;
6899 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
6900 continue;
6901 }
6902
6903 /* Look for an existing fixup to this address. */
6904 for (f = fixups; f ; f = f->next)
6905 if (f->tsec == tsec && f->toff == toff)
6906 break;
6907
6908 if (f == NULL)
6909 {
6910 size_t size;
6911 unsigned long stub_rtype;
6912
6913 val = trampoff - roff;
6914 if (val >= max_branch_offset)
6915 /* Oh dear, we can't reach a trampoline. Don't try to add
6916 one. We'll report an error later. */
6917 continue;
6918
6919 if (link_info->shared)
6920 {
6921 size = 4 * ARRAY_SIZE (shared_stub_entry);
6922 insn_offset = 12;
6923 }
6924 else
6925 {
6926 size = 4 * ARRAY_SIZE (stub_entry);
6927 insn_offset = 0;
6928 }
6929 stub_rtype = R_PPC_RELAX;
6930 if (tsec == htab->plt
6931 || tsec == htab->glink)
6932 {
6933 stub_rtype = R_PPC_RELAX_PLT;
6934 if (r_type == R_PPC_PLTREL24)
6935 stub_rtype = R_PPC_RELAX_PLTREL24;
6936 }
6937
6938 /* Hijack the old relocation. Since we need two
6939 relocations for this use a "composite" reloc. */
6940 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6941 stub_rtype);
6942 irel->r_offset = trampoff + insn_offset;
6943 if (r_type == R_PPC_PLTREL24
6944 && stub_rtype != R_PPC_RELAX_PLTREL24)
6945 irel->r_addend = 0;
6946
6947 /* Record the fixup so we don't do it again this section. */
6948 f = bfd_malloc (sizeof (*f));
6949 f->next = fixups;
6950 f->tsec = tsec;
6951 f->toff = toff;
6952 f->trampoff = trampoff;
6953 fixups = f;
6954
6955 trampoff += size;
6956 changes++;
6957 }
6958 else
6959 {
6960 val = f->trampoff - roff;
6961 if (val >= max_branch_offset)
6962 continue;
6963
6964 /* Nop out the reloc, since we're finalizing things here. */
6965 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
6966 }
6967
6968 /* Get the section contents. */
6969 if (contents == NULL)
6970 {
6971 /* Get cached copy if it exists. */
6972 if (elf_section_data (isec)->this_hdr.contents != NULL)
6973 contents = elf_section_data (isec)->this_hdr.contents;
6974 else
6975 {
6976 /* Go get them off disk. */
6977 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
6978 goto error_return;
6979 }
6980 }
6981
6982 /* Fix up the existing branch to hit the trampoline. */
6983 hit_addr = contents + roff;
6984 switch (r_type)
6985 {
6986 case R_PPC_REL24:
6987 case R_PPC_LOCAL24PC:
6988 case R_PPC_PLTREL24:
6989 t0 = bfd_get_32 (abfd, hit_addr);
6990 t0 &= ~0x3fffffc;
6991 t0 |= val & 0x3fffffc;
6992 bfd_put_32 (abfd, t0, hit_addr);
6993 break;
6994
6995 case R_PPC_REL14:
6996 case R_PPC_REL14_BRTAKEN:
6997 case R_PPC_REL14_BRNTAKEN:
6998 t0 = bfd_get_32 (abfd, hit_addr);
6999 t0 &= ~0xfffc;
7000 t0 |= val & 0xfffc;
7001 bfd_put_32 (abfd, t0, hit_addr);
7002 break;
7003 }
7004 }
7005
7006 /* Write out the trampolines. */
7007 if (fixups != NULL)
7008 {
7009 const int *stub;
7010 bfd_byte *dest;
7011 int i, size;
7012
7013 do
7014 {
7015 struct one_fixup *f = fixups;
7016 fixups = fixups->next;
7017 free (f);
7018 }
7019 while (fixups);
7020
7021 contents = bfd_realloc_or_free (contents, trampoff);
7022 if (contents == NULL)
7023 goto error_return;
7024
7025 isec->size = (isec->size + 3) & (bfd_vma) -4;
7026 dest = contents + isec->size;
7027 /* Branch around the trampolines. */
7028 if (maybe_pasted)
7029 {
7030 bfd_vma val = B + trampoff - isec->size;
7031 bfd_put_32 (abfd, val, dest);
7032 dest += 4;
7033 }
7034 isec->size = trampoff;
7035
7036 if (link_info->shared)
7037 {
7038 stub = shared_stub_entry;
7039 size = ARRAY_SIZE (shared_stub_entry);
7040 }
7041 else
7042 {
7043 stub = stub_entry;
7044 size = ARRAY_SIZE (stub_entry);
7045 }
7046
7047 i = 0;
7048 while (dest < contents + trampoff)
7049 {
7050 bfd_put_32 (abfd, stub[i], dest);
7051 i++;
7052 if (i == size)
7053 i = 0;
7054 dest += 4;
7055 }
7056 BFD_ASSERT (i == 0);
7057 }
7058
7059 if (isymbuf != NULL
7060 && symtab_hdr->contents != (unsigned char *) isymbuf)
7061 {
7062 if (! link_info->keep_memory)
7063 free (isymbuf);
7064 else
7065 {
7066 /* Cache the symbols for elf_link_input_bfd. */
7067 symtab_hdr->contents = (unsigned char *) isymbuf;
7068 }
7069 }
7070
7071 if (contents != NULL
7072 && elf_section_data (isec)->this_hdr.contents != contents)
7073 {
7074 if (!changes && !link_info->keep_memory)
7075 free (contents);
7076 else
7077 {
7078 /* Cache the section contents for elf_link_input_bfd. */
7079 elf_section_data (isec)->this_hdr.contents = contents;
7080 }
7081 }
7082
7083 if (changes != 0)
7084 {
7085 /* Append sufficient NOP relocs so we can write out relocation
7086 information for the trampolines. */
7087 Elf_Internal_Shdr *rel_hdr;
7088 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7089 * sizeof (*new_relocs));
7090 unsigned ix;
7091
7092 if (!new_relocs)
7093 goto error_return;
7094 memcpy (new_relocs, internal_relocs,
7095 isec->reloc_count * sizeof (*new_relocs));
7096 for (ix = changes; ix--;)
7097 {
7098 irel = new_relocs + ix + isec->reloc_count;
7099
7100 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7101 }
7102 if (internal_relocs != elf_section_data (isec)->relocs)
7103 free (internal_relocs);
7104 elf_section_data (isec)->relocs = new_relocs;
7105 isec->reloc_count += changes;
7106 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7107 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7108 }
7109 else if (elf_section_data (isec)->relocs != internal_relocs)
7110 free (internal_relocs);
7111
7112 *again = changes != 0;
7113 if (!*again && link_info->relocatable)
7114 {
7115 /* Convert the internal relax relocs to external form. */
7116 for (irel = internal_relocs; irel < irelend; irel++)
7117 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
7118 {
7119 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
7120
7121 /* Rewrite the reloc and convert one of the trailing nop
7122 relocs to describe this relocation. */
7123 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
7124 /* The relocs are at the bottom 2 bytes */
7125 irel[0].r_offset += 2;
7126 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
7127 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7128 irel[1].r_offset += 4;
7129 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7130 irel++;
7131 }
7132 }
7133
7134 return TRUE;
7135
7136 error_return:
7137 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7138 free (isymbuf);
7139 if (contents != NULL
7140 && elf_section_data (isec)->this_hdr.contents != contents)
7141 free (contents);
7142 if (internal_relocs != NULL
7143 && elf_section_data (isec)->relocs != internal_relocs)
7144 free (internal_relocs);
7145 return FALSE;
7146 }
7147 \f
7148 /* What to do when ld finds relocations against symbols defined in
7149 discarded sections. */
7150
7151 static unsigned int
7152 ppc_elf_action_discarded (asection *sec)
7153 {
7154 if (strcmp (".fixup", sec->name) == 0)
7155 return 0;
7156
7157 if (strcmp (".got2", sec->name) == 0)
7158 return 0;
7159
7160 return _bfd_elf_default_action_discarded (sec);
7161 }
7162 \f
7163 /* Fill in the address for a pointer generated in a linker section. */
7164
7165 static bfd_vma
7166 elf_finish_pointer_linker_section (bfd *input_bfd,
7167 elf_linker_section_t *lsect,
7168 struct elf_link_hash_entry *h,
7169 bfd_vma relocation,
7170 const Elf_Internal_Rela *rel)
7171 {
7172 elf_linker_section_pointers_t *linker_section_ptr;
7173
7174 BFD_ASSERT (lsect != NULL);
7175
7176 if (h != NULL)
7177 {
7178 /* Handle global symbol. */
7179 struct ppc_elf_link_hash_entry *eh;
7180
7181 eh = (struct ppc_elf_link_hash_entry *) h;
7182 BFD_ASSERT (eh->elf.def_regular);
7183 linker_section_ptr = eh->linker_section_pointer;
7184 }
7185 else
7186 {
7187 /* Handle local symbol. */
7188 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7189
7190 BFD_ASSERT (is_ppc_elf (input_bfd));
7191 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7192 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7193 }
7194
7195 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7196 rel->r_addend,
7197 lsect);
7198 BFD_ASSERT (linker_section_ptr != NULL);
7199
7200 /* Offset will always be a multiple of four, so use the bottom bit
7201 as a "written" flag. */
7202 if ((linker_section_ptr->offset & 1) == 0)
7203 {
7204 bfd_put_32 (lsect->section->owner,
7205 relocation + linker_section_ptr->addend,
7206 lsect->section->contents + linker_section_ptr->offset);
7207 linker_section_ptr->offset += 1;
7208 }
7209
7210 relocation = (lsect->section->output_section->vma
7211 + lsect->section->output_offset
7212 + linker_section_ptr->offset - 1
7213 - SYM_VAL (lsect->sym));
7214
7215 #ifdef DEBUG
7216 fprintf (stderr,
7217 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7218 lsect->name, (long) relocation, (long) relocation);
7219 #endif
7220
7221 return relocation;
7222 }
7223
7224 #define PPC_LO(v) ((v) & 0xffff)
7225 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7226 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7227
7228 static void
7229 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7230 struct bfd_link_info *info)
7231 {
7232 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7233 bfd *output_bfd = info->output_bfd;
7234 bfd_vma plt;
7235
7236 plt = ((ent->plt.offset & ~1)
7237 + plt_sec->output_section->vma
7238 + plt_sec->output_offset);
7239
7240 if (info->shared)
7241 {
7242 bfd_vma got = 0;
7243
7244 if (ent->addend >= 32768)
7245 got = (ent->addend
7246 + ent->sec->output_section->vma
7247 + ent->sec->output_offset);
7248 else if (htab->elf.hgot != NULL)
7249 got = SYM_VAL (htab->elf.hgot);
7250
7251 plt -= got;
7252
7253 if (plt + 0x8000 < 0x10000)
7254 {
7255 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7256 p += 4;
7257 bfd_put_32 (output_bfd, MTCTR_11, p);
7258 p += 4;
7259 bfd_put_32 (output_bfd, BCTR, p);
7260 p += 4;
7261 bfd_put_32 (output_bfd, NOP, p);
7262 p += 4;
7263 }
7264 else
7265 {
7266 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7267 p += 4;
7268 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7269 p += 4;
7270 bfd_put_32 (output_bfd, MTCTR_11, p);
7271 p += 4;
7272 bfd_put_32 (output_bfd, BCTR, p);
7273 p += 4;
7274 }
7275 }
7276 else
7277 {
7278 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7279 p += 4;
7280 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7281 p += 4;
7282 bfd_put_32 (output_bfd, MTCTR_11, p);
7283 p += 4;
7284 bfd_put_32 (output_bfd, BCTR, p);
7285 p += 4;
7286 }
7287 }
7288
7289 /* Return true if symbol is defined statically. */
7290
7291 static bfd_boolean
7292 is_static_defined (struct elf_link_hash_entry *h)
7293 {
7294 return ((h->root.type == bfd_link_hash_defined
7295 || h->root.type == bfd_link_hash_defweak)
7296 && h->root.u.def.section != NULL
7297 && h->root.u.def.section->output_section != NULL);
7298 }
7299
7300 /* If INSN is an opcode that may be used with an @tls operand, return
7301 the transformed insn for TLS optimisation, otherwise return 0. If
7302 REG is non-zero only match an insn with RB or RA equal to REG. */
7303
7304 unsigned int
7305 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7306 {
7307 unsigned int rtra;
7308
7309 if ((insn & (0x3f << 26)) != 31 << 26)
7310 return 0;
7311
7312 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7313 rtra = insn & ((1 << 26) - (1 << 16));
7314 else if (((insn >> 16) & 0x1f) == reg)
7315 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7316 else
7317 return 0;
7318
7319 if ((insn & (0x3ff << 1)) == 266 << 1)
7320 /* add -> addi. */
7321 insn = 14 << 26;
7322 else if ((insn & (0x1f << 1)) == 23 << 1
7323 && ((insn & (0x1f << 6)) < 14 << 6
7324 || ((insn & (0x1f << 6)) >= 16 << 6
7325 && (insn & (0x1f << 6)) < 24 << 6)))
7326 /* load and store indexed -> dform. */
7327 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7328 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7329 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7330 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7331 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7332 /* lwax -> lwa. */
7333 insn = (58 << 26) | 2;
7334 else
7335 return 0;
7336 insn |= rtra;
7337 return insn;
7338 }
7339
7340 /* If INSN is an opcode that may be used with an @tprel operand, return
7341 the transformed insn for an undefined weak symbol, ie. with the
7342 thread pointer REG operand removed. Otherwise return 0. */
7343
7344 unsigned int
7345 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7346 {
7347 if ((insn & (0x1f << 16)) == reg << 16
7348 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7349 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7350 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7351 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7352 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7353 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7354 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7355 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7356 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7357 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7358 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7359 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7360 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7361 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7362 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7363 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7364 && (insn & 3) != 1)
7365 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7366 && ((insn & 3) == 0 || (insn & 3) == 3))))
7367 {
7368 insn &= ~(0x1f << 16);
7369 }
7370 else if ((insn & (0x1f << 21)) == reg << 21
7371 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7372 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7373 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7374 {
7375 insn &= ~(0x1f << 21);
7376 insn |= (insn & (0x1f << 16)) << 5;
7377 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7378 insn -= 2 >> 26; /* convert to ori,oris */
7379 }
7380 else
7381 insn = 0;
7382 return insn;
7383 }
7384
7385 static bfd_boolean
7386 is_insn_ds_form (unsigned int insn)
7387 {
7388 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7389 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7390 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7391 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7392 }
7393
7394 static bfd_boolean
7395 is_insn_dq_form (unsigned int insn)
7396 {
7397 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7398 }
7399
7400 /* The RELOCATE_SECTION function is called by the ELF backend linker
7401 to handle the relocations for a section.
7402
7403 The relocs are always passed as Rela structures; if the section
7404 actually uses Rel structures, the r_addend field will always be
7405 zero.
7406
7407 This function is responsible for adjust the section contents as
7408 necessary, and (if using Rela relocs and generating a
7409 relocatable output file) adjusting the reloc addend as
7410 necessary.
7411
7412 This function does not have to worry about setting the reloc
7413 address or the reloc symbol index.
7414
7415 LOCAL_SYMS is a pointer to the swapped in local symbols.
7416
7417 LOCAL_SECTIONS is an array giving the section in the input file
7418 corresponding to the st_shndx field of each local symbol.
7419
7420 The global hash table entry for the global symbols can be found
7421 via elf_sym_hashes (input_bfd).
7422
7423 When generating relocatable output, this function must handle
7424 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7425 going to be the section symbol corresponding to the output
7426 section, which means that the addend must be adjusted
7427 accordingly. */
7428
7429 static bfd_boolean
7430 ppc_elf_relocate_section (bfd *output_bfd,
7431 struct bfd_link_info *info,
7432 bfd *input_bfd,
7433 asection *input_section,
7434 bfd_byte *contents,
7435 Elf_Internal_Rela *relocs,
7436 Elf_Internal_Sym *local_syms,
7437 asection **local_sections)
7438 {
7439 Elf_Internal_Shdr *symtab_hdr;
7440 struct elf_link_hash_entry **sym_hashes;
7441 struct ppc_elf_link_hash_table *htab;
7442 Elf_Internal_Rela *rel;
7443 Elf_Internal_Rela *relend;
7444 Elf_Internal_Rela outrel;
7445 asection *got2;
7446 bfd_vma *local_got_offsets;
7447 bfd_boolean ret = TRUE;
7448 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7449 bfd_boolean is_vxworks_tls;
7450
7451 #ifdef DEBUG
7452 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7453 "%ld relocations%s",
7454 input_bfd, input_section,
7455 (long) input_section->reloc_count,
7456 (info->relocatable) ? " (relocatable)" : "");
7457 #endif
7458
7459 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7460
7461 /* Initialize howto table if not already done. */
7462 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7463 ppc_elf_howto_init ();
7464
7465 htab = ppc_elf_hash_table (info);
7466 local_got_offsets = elf_local_got_offsets (input_bfd);
7467 symtab_hdr = &elf_symtab_hdr (input_bfd);
7468 sym_hashes = elf_sym_hashes (input_bfd);
7469 /* We have to handle relocations in vxworks .tls_vars sections
7470 specially, because the dynamic loader is 'weird'. */
7471 is_vxworks_tls = (htab->is_vxworks && info->shared
7472 && !strcmp (input_section->output_section->name,
7473 ".tls_vars"));
7474 rel = relocs;
7475 relend = relocs + input_section->reloc_count;
7476 for (; rel < relend; rel++)
7477 {
7478 enum elf_ppc_reloc_type r_type;
7479 bfd_vma addend;
7480 bfd_reloc_status_type r;
7481 Elf_Internal_Sym *sym;
7482 asection *sec;
7483 struct elf_link_hash_entry *h;
7484 const char *sym_name;
7485 reloc_howto_type *howto;
7486 unsigned long r_symndx;
7487 bfd_vma relocation;
7488 bfd_vma branch_bit, from;
7489 bfd_boolean unresolved_reloc;
7490 bfd_boolean warned;
7491 unsigned int tls_type, tls_mask, tls_gd;
7492 struct plt_entry **ifunc;
7493
7494 r_type = ELF32_R_TYPE (rel->r_info);
7495 sym = NULL;
7496 sec = NULL;
7497 h = NULL;
7498 unresolved_reloc = FALSE;
7499 warned = FALSE;
7500 r_symndx = ELF32_R_SYM (rel->r_info);
7501
7502 if (r_symndx < symtab_hdr->sh_info)
7503 {
7504 sym = local_syms + r_symndx;
7505 sec = local_sections[r_symndx];
7506 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7507
7508 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7509 }
7510 else
7511 {
7512 bfd_boolean ignored;
7513
7514 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7515 r_symndx, symtab_hdr, sym_hashes,
7516 h, sec, relocation,
7517 unresolved_reloc, warned, ignored);
7518
7519 sym_name = h->root.root.string;
7520 }
7521
7522 if (sec != NULL && discarded_section (sec))
7523 {
7524 /* For relocs against symbols from removed linkonce sections,
7525 or sections discarded by a linker script, we just want the
7526 section contents zeroed. Avoid any special processing. */
7527 howto = NULL;
7528 if (r_type < R_PPC_max)
7529 howto = ppc_elf_howto_table[r_type];
7530 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7531 rel, 1, relend, howto, 0, contents);
7532 }
7533
7534 if (info->relocatable)
7535 {
7536 if (got2 != NULL
7537 && r_type == R_PPC_PLTREL24
7538 && rel->r_addend != 0)
7539 {
7540 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7541 addend specifies the GOT pointer offset within .got2. */
7542 rel->r_addend += got2->output_offset;
7543 }
7544 continue;
7545 }
7546
7547 /* TLS optimizations. Replace instruction sequences and relocs
7548 based on information we collected in tls_optimize. We edit
7549 RELOCS so that --emit-relocs will output something sensible
7550 for the final instruction stream. */
7551 tls_mask = 0;
7552 tls_gd = 0;
7553 if (h != NULL)
7554 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7555 else if (local_got_offsets != NULL)
7556 {
7557 struct plt_entry **local_plt;
7558 char *lgot_masks;
7559 local_plt
7560 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7561 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7562 tls_mask = lgot_masks[r_symndx];
7563 }
7564
7565 /* Ensure reloc mapping code below stays sane. */
7566 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7567 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7568 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7569 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7570 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7571 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7572 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7573 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7574 abort ();
7575 switch (r_type)
7576 {
7577 default:
7578 break;
7579
7580 case R_PPC_GOT_TPREL16:
7581 case R_PPC_GOT_TPREL16_LO:
7582 if ((tls_mask & TLS_TLS) != 0
7583 && (tls_mask & TLS_TPREL) == 0)
7584 {
7585 bfd_vma insn;
7586
7587 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7588 insn &= 31 << 21;
7589 insn |= 0x3c020000; /* addis 0,2,0 */
7590 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7591 r_type = R_PPC_TPREL16_HA;
7592 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7593 }
7594 break;
7595
7596 case R_PPC_TLS:
7597 if ((tls_mask & TLS_TLS) != 0
7598 && (tls_mask & TLS_TPREL) == 0)
7599 {
7600 bfd_vma insn;
7601
7602 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7603 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7604 if (insn == 0)
7605 abort ();
7606 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7607 r_type = R_PPC_TPREL16_LO;
7608 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7609
7610 /* Was PPC_TLS which sits on insn boundary, now
7611 PPC_TPREL16_LO which is at low-order half-word. */
7612 rel->r_offset += d_offset;
7613 }
7614 break;
7615
7616 case R_PPC_GOT_TLSGD16_HI:
7617 case R_PPC_GOT_TLSGD16_HA:
7618 tls_gd = TLS_TPRELGD;
7619 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7620 goto tls_gdld_hi;
7621 break;
7622
7623 case R_PPC_GOT_TLSLD16_HI:
7624 case R_PPC_GOT_TLSLD16_HA:
7625 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7626 {
7627 tls_gdld_hi:
7628 if ((tls_mask & tls_gd) != 0)
7629 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7630 + R_PPC_GOT_TPREL16);
7631 else
7632 {
7633 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7634 rel->r_offset -= d_offset;
7635 r_type = R_PPC_NONE;
7636 }
7637 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7638 }
7639 break;
7640
7641 case R_PPC_GOT_TLSGD16:
7642 case R_PPC_GOT_TLSGD16_LO:
7643 tls_gd = TLS_TPRELGD;
7644 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7645 goto tls_ldgd_opt;
7646 break;
7647
7648 case R_PPC_GOT_TLSLD16:
7649 case R_PPC_GOT_TLSLD16_LO:
7650 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7651 {
7652 unsigned int insn1, insn2;
7653 bfd_vma offset;
7654
7655 tls_ldgd_opt:
7656 offset = (bfd_vma) -1;
7657 /* If not using the newer R_PPC_TLSGD/LD to mark
7658 __tls_get_addr calls, we must trust that the call
7659 stays with its arg setup insns, ie. that the next
7660 reloc is the __tls_get_addr call associated with
7661 the current reloc. Edit both insns. */
7662 if (input_section->has_tls_get_addr_call
7663 && rel + 1 < relend
7664 && branch_reloc_hash_match (input_bfd, rel + 1,
7665 htab->tls_get_addr))
7666 offset = rel[1].r_offset;
7667 if ((tls_mask & tls_gd) != 0)
7668 {
7669 /* IE */
7670 insn1 = bfd_get_32 (output_bfd,
7671 contents + rel->r_offset - d_offset);
7672 insn1 &= (1 << 26) - 1;
7673 insn1 |= 32 << 26; /* lwz */
7674 if (offset != (bfd_vma) -1)
7675 {
7676 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7677 insn2 = 0x7c631214; /* add 3,3,2 */
7678 bfd_put_32 (output_bfd, insn2, contents + offset);
7679 }
7680 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7681 + R_PPC_GOT_TPREL16);
7682 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7683 }
7684 else
7685 {
7686 /* LE */
7687 insn1 = 0x3c620000; /* addis 3,2,0 */
7688 if (tls_gd == 0)
7689 {
7690 /* Was an LD reloc. */
7691 for (r_symndx = 0;
7692 r_symndx < symtab_hdr->sh_info;
7693 r_symndx++)
7694 if (local_sections[r_symndx] == sec)
7695 break;
7696 if (r_symndx >= symtab_hdr->sh_info)
7697 r_symndx = STN_UNDEF;
7698 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7699 if (r_symndx != STN_UNDEF)
7700 rel->r_addend -= (local_syms[r_symndx].st_value
7701 + sec->output_offset
7702 + sec->output_section->vma);
7703 }
7704 r_type = R_PPC_TPREL16_HA;
7705 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7706 if (offset != (bfd_vma) -1)
7707 {
7708 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7709 rel[1].r_offset = offset + d_offset;
7710 rel[1].r_addend = rel->r_addend;
7711 insn2 = 0x38630000; /* addi 3,3,0 */
7712 bfd_put_32 (output_bfd, insn2, contents + offset);
7713 }
7714 }
7715 bfd_put_32 (output_bfd, insn1,
7716 contents + rel->r_offset - d_offset);
7717 if (tls_gd == 0)
7718 {
7719 /* We changed the symbol on an LD reloc. Start over
7720 in order to get h, sym, sec etc. right. */
7721 rel--;
7722 continue;
7723 }
7724 }
7725 break;
7726
7727 case R_PPC_TLSGD:
7728 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7729 {
7730 unsigned int insn2;
7731 bfd_vma offset = rel->r_offset;
7732
7733 if ((tls_mask & TLS_TPRELGD) != 0)
7734 {
7735 /* IE */
7736 r_type = R_PPC_NONE;
7737 insn2 = 0x7c631214; /* add 3,3,2 */
7738 }
7739 else
7740 {
7741 /* LE */
7742 r_type = R_PPC_TPREL16_LO;
7743 rel->r_offset += d_offset;
7744 insn2 = 0x38630000; /* addi 3,3,0 */
7745 }
7746 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7747 bfd_put_32 (output_bfd, insn2, contents + offset);
7748 /* Zap the reloc on the _tls_get_addr call too. */
7749 BFD_ASSERT (offset == rel[1].r_offset);
7750 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7751 }
7752 break;
7753
7754 case R_PPC_TLSLD:
7755 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7756 {
7757 unsigned int insn2;
7758
7759 for (r_symndx = 0;
7760 r_symndx < symtab_hdr->sh_info;
7761 r_symndx++)
7762 if (local_sections[r_symndx] == sec)
7763 break;
7764 if (r_symndx >= symtab_hdr->sh_info)
7765 r_symndx = STN_UNDEF;
7766 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7767 if (r_symndx != STN_UNDEF)
7768 rel->r_addend -= (local_syms[r_symndx].st_value
7769 + sec->output_offset
7770 + sec->output_section->vma);
7771
7772 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7773 rel->r_offset += d_offset;
7774 insn2 = 0x38630000; /* addi 3,3,0 */
7775 bfd_put_32 (output_bfd, insn2,
7776 contents + rel->r_offset - d_offset);
7777 /* Zap the reloc on the _tls_get_addr call too. */
7778 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7779 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7780 rel--;
7781 continue;
7782 }
7783 break;
7784 }
7785
7786 /* Handle other relocations that tweak non-addend part of insn. */
7787 branch_bit = 0;
7788 switch (r_type)
7789 {
7790 default:
7791 break;
7792
7793 /* Branch taken prediction relocations. */
7794 case R_PPC_ADDR14_BRTAKEN:
7795 case R_PPC_REL14_BRTAKEN:
7796 branch_bit = BRANCH_PREDICT_BIT;
7797 /* Fall thru */
7798
7799 /* Branch not taken prediction relocations. */
7800 case R_PPC_ADDR14_BRNTAKEN:
7801 case R_PPC_REL14_BRNTAKEN:
7802 {
7803 bfd_vma insn;
7804
7805 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7806 insn &= ~BRANCH_PREDICT_BIT;
7807 insn |= branch_bit;
7808
7809 from = (rel->r_offset
7810 + input_section->output_offset
7811 + input_section->output_section->vma);
7812
7813 /* Invert 'y' bit if not the default. */
7814 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7815 insn ^= BRANCH_PREDICT_BIT;
7816
7817 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7818 break;
7819 }
7820 }
7821
7822 ifunc = NULL;
7823 if (!htab->is_vxworks)
7824 {
7825 struct plt_entry *ent;
7826
7827 if (h != NULL)
7828 {
7829 if (h->type == STT_GNU_IFUNC)
7830 ifunc = &h->plt.plist;
7831 }
7832 else if (local_got_offsets != NULL
7833 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7834 {
7835 struct plt_entry **local_plt;
7836
7837 local_plt = (struct plt_entry **) (local_got_offsets
7838 + symtab_hdr->sh_info);
7839 ifunc = local_plt + r_symndx;
7840 }
7841
7842 ent = NULL;
7843 if (ifunc != NULL
7844 && (!info->shared
7845 || is_branch_reloc (r_type)))
7846 {
7847 addend = 0;
7848 if (r_type == R_PPC_PLTREL24 && info->shared)
7849 addend = rel->r_addend;
7850 ent = find_plt_ent (ifunc, got2, addend);
7851 }
7852 if (ent != NULL)
7853 {
7854 if (h == NULL && (ent->plt.offset & 1) == 0)
7855 {
7856 Elf_Internal_Rela rela;
7857 bfd_byte *loc;
7858
7859 rela.r_offset = (htab->iplt->output_section->vma
7860 + htab->iplt->output_offset
7861 + ent->plt.offset);
7862 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7863 rela.r_addend = relocation;
7864 loc = htab->reliplt->contents;
7865 loc += (htab->reliplt->reloc_count++
7866 * sizeof (Elf32_External_Rela));
7867 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7868
7869 ent->plt.offset |= 1;
7870 }
7871 if (h == NULL && (ent->glink_offset & 1) == 0)
7872 {
7873 unsigned char *p = ((unsigned char *) htab->glink->contents
7874 + ent->glink_offset);
7875 write_glink_stub (ent, htab->iplt, p, info);
7876 ent->glink_offset |= 1;
7877 }
7878
7879 unresolved_reloc = FALSE;
7880 if (htab->plt_type == PLT_NEW
7881 || !htab->elf.dynamic_sections_created
7882 || h == NULL
7883 || h->dynindx == -1)
7884 relocation = (htab->glink->output_section->vma
7885 + htab->glink->output_offset
7886 + (ent->glink_offset & ~1));
7887 else
7888 relocation = (htab->plt->output_section->vma
7889 + htab->plt->output_offset
7890 + ent->plt.offset);
7891 }
7892 }
7893
7894 addend = rel->r_addend;
7895 tls_type = 0;
7896 howto = NULL;
7897 if (r_type < R_PPC_max)
7898 howto = ppc_elf_howto_table[r_type];
7899 switch (r_type)
7900 {
7901 default:
7902 info->callbacks->einfo
7903 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
7904 input_bfd, (int) r_type, sym_name);
7905
7906 bfd_set_error (bfd_error_bad_value);
7907 ret = FALSE;
7908 continue;
7909
7910 case R_PPC_NONE:
7911 case R_PPC_TLS:
7912 case R_PPC_TLSGD:
7913 case R_PPC_TLSLD:
7914 case R_PPC_EMB_MRKREF:
7915 case R_PPC_GNU_VTINHERIT:
7916 case R_PPC_GNU_VTENTRY:
7917 continue;
7918
7919 /* GOT16 relocations. Like an ADDR16 using the symbol's
7920 address in the GOT as relocation value instead of the
7921 symbol's value itself. Also, create a GOT entry for the
7922 symbol and put the symbol value there. */
7923 case R_PPC_GOT_TLSGD16:
7924 case R_PPC_GOT_TLSGD16_LO:
7925 case R_PPC_GOT_TLSGD16_HI:
7926 case R_PPC_GOT_TLSGD16_HA:
7927 tls_type = TLS_TLS | TLS_GD;
7928 goto dogot;
7929
7930 case R_PPC_GOT_TLSLD16:
7931 case R_PPC_GOT_TLSLD16_LO:
7932 case R_PPC_GOT_TLSLD16_HI:
7933 case R_PPC_GOT_TLSLD16_HA:
7934 tls_type = TLS_TLS | TLS_LD;
7935 goto dogot;
7936
7937 case R_PPC_GOT_TPREL16:
7938 case R_PPC_GOT_TPREL16_LO:
7939 case R_PPC_GOT_TPREL16_HI:
7940 case R_PPC_GOT_TPREL16_HA:
7941 tls_type = TLS_TLS | TLS_TPREL;
7942 goto dogot;
7943
7944 case R_PPC_GOT_DTPREL16:
7945 case R_PPC_GOT_DTPREL16_LO:
7946 case R_PPC_GOT_DTPREL16_HI:
7947 case R_PPC_GOT_DTPREL16_HA:
7948 tls_type = TLS_TLS | TLS_DTPREL;
7949 goto dogot;
7950
7951 case R_PPC_GOT16:
7952 case R_PPC_GOT16_LO:
7953 case R_PPC_GOT16_HI:
7954 case R_PPC_GOT16_HA:
7955 tls_mask = 0;
7956 dogot:
7957 {
7958 /* Relocation is to the entry for this symbol in the global
7959 offset table. */
7960 bfd_vma off;
7961 bfd_vma *offp;
7962 unsigned long indx;
7963
7964 if (htab->got == NULL)
7965 abort ();
7966
7967 indx = 0;
7968 if (tls_type == (TLS_TLS | TLS_LD)
7969 && (h == NULL
7970 || !h->def_dynamic))
7971 offp = &htab->tlsld_got.offset;
7972 else if (h != NULL)
7973 {
7974 bfd_boolean dyn;
7975 dyn = htab->elf.dynamic_sections_created;
7976 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
7977 || (info->shared
7978 && SYMBOL_REFERENCES_LOCAL (info, h)))
7979 /* This is actually a static link, or it is a
7980 -Bsymbolic link and the symbol is defined
7981 locally, or the symbol was forced to be local
7982 because of a version file. */
7983 ;
7984 else
7985 {
7986 BFD_ASSERT (h->dynindx != -1);
7987 indx = h->dynindx;
7988 unresolved_reloc = FALSE;
7989 }
7990 offp = &h->got.offset;
7991 }
7992 else
7993 {
7994 if (local_got_offsets == NULL)
7995 abort ();
7996 offp = &local_got_offsets[r_symndx];
7997 }
7998
7999 /* The offset must always be a multiple of 4. We use the
8000 least significant bit to record whether we have already
8001 processed this entry. */
8002 off = *offp;
8003 if ((off & 1) != 0)
8004 off &= ~1;
8005 else
8006 {
8007 unsigned int tls_m = (tls_mask
8008 & (TLS_LD | TLS_GD | TLS_DTPREL
8009 | TLS_TPREL | TLS_TPRELGD));
8010
8011 if (offp == &htab->tlsld_got.offset)
8012 tls_m = TLS_LD;
8013 else if (h == NULL
8014 || !h->def_dynamic)
8015 tls_m &= ~TLS_LD;
8016
8017 /* We might have multiple got entries for this sym.
8018 Initialize them all. */
8019 do
8020 {
8021 int tls_ty = 0;
8022
8023 if ((tls_m & TLS_LD) != 0)
8024 {
8025 tls_ty = TLS_TLS | TLS_LD;
8026 tls_m &= ~TLS_LD;
8027 }
8028 else if ((tls_m & TLS_GD) != 0)
8029 {
8030 tls_ty = TLS_TLS | TLS_GD;
8031 tls_m &= ~TLS_GD;
8032 }
8033 else if ((tls_m & TLS_DTPREL) != 0)
8034 {
8035 tls_ty = TLS_TLS | TLS_DTPREL;
8036 tls_m &= ~TLS_DTPREL;
8037 }
8038 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8039 {
8040 tls_ty = TLS_TLS | TLS_TPREL;
8041 tls_m = 0;
8042 }
8043
8044 /* Generate relocs for the dynamic linker. */
8045 if ((info->shared || indx != 0)
8046 && (offp == &htab->tlsld_got.offset
8047 || h == NULL
8048 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8049 || h->root.type != bfd_link_hash_undefweak))
8050 {
8051 asection *rsec = htab->relgot;
8052 bfd_byte * loc;
8053
8054 if (ifunc != NULL)
8055 rsec = htab->reliplt;
8056 outrel.r_offset = (htab->got->output_section->vma
8057 + htab->got->output_offset
8058 + off);
8059 outrel.r_addend = 0;
8060 if (tls_ty & (TLS_LD | TLS_GD))
8061 {
8062 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8063 if (tls_ty == (TLS_TLS | TLS_GD))
8064 {
8065 loc = rsec->contents;
8066 loc += (rsec->reloc_count++
8067 * sizeof (Elf32_External_Rela));
8068 bfd_elf32_swap_reloca_out (output_bfd,
8069 &outrel, loc);
8070 outrel.r_offset += 4;
8071 outrel.r_info
8072 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8073 }
8074 }
8075 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8076 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8077 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8078 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8079 else if (indx != 0)
8080 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8081 else if (ifunc != NULL)
8082 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8083 else
8084 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8085 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8086 {
8087 outrel.r_addend += relocation;
8088 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8089 outrel.r_addend -= htab->elf.tls_sec->vma;
8090 }
8091 loc = rsec->contents;
8092 loc += (rsec->reloc_count++
8093 * sizeof (Elf32_External_Rela));
8094 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8095 }
8096
8097 /* Init the .got section contents if we're not
8098 emitting a reloc. */
8099 else
8100 {
8101 bfd_vma value = relocation;
8102
8103 if (tls_ty == (TLS_TLS | TLS_LD))
8104 value = 1;
8105 else if (tls_ty != 0)
8106 {
8107 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8108 if (tls_ty == (TLS_TLS | TLS_TPREL))
8109 value += DTP_OFFSET - TP_OFFSET;
8110
8111 if (tls_ty == (TLS_TLS | TLS_GD))
8112 {
8113 bfd_put_32 (output_bfd, value,
8114 htab->got->contents + off + 4);
8115 value = 1;
8116 }
8117 }
8118 bfd_put_32 (output_bfd, value,
8119 htab->got->contents + off);
8120 }
8121
8122 off += 4;
8123 if (tls_ty & (TLS_LD | TLS_GD))
8124 off += 4;
8125 }
8126 while (tls_m != 0);
8127
8128 off = *offp;
8129 *offp = off | 1;
8130 }
8131
8132 if (off >= (bfd_vma) -2)
8133 abort ();
8134
8135 if ((tls_type & TLS_TLS) != 0)
8136 {
8137 if (tls_type != (TLS_TLS | TLS_LD))
8138 {
8139 if ((tls_mask & TLS_LD) != 0
8140 && !(h == NULL
8141 || !h->def_dynamic))
8142 off += 8;
8143 if (tls_type != (TLS_TLS | TLS_GD))
8144 {
8145 if ((tls_mask & TLS_GD) != 0)
8146 off += 8;
8147 if (tls_type != (TLS_TLS | TLS_DTPREL))
8148 {
8149 if ((tls_mask & TLS_DTPREL) != 0)
8150 off += 4;
8151 }
8152 }
8153 }
8154 }
8155
8156 relocation = (htab->got->output_section->vma
8157 + htab->got->output_offset
8158 + off
8159 - SYM_VAL (htab->elf.hgot));
8160
8161 /* Addends on got relocations don't make much sense.
8162 x+off@got is actually x@got+off, and since the got is
8163 generated by a hash table traversal, the value in the
8164 got at entry m+n bears little relation to the entry m. */
8165 if (addend != 0)
8166 info->callbacks->einfo
8167 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8168 input_bfd, input_section, rel->r_offset,
8169 howto->name,
8170 sym_name);
8171 }
8172 break;
8173
8174 /* Relocations that need no special processing. */
8175 case R_PPC_LOCAL24PC:
8176 /* It makes no sense to point a local relocation
8177 at a symbol not in this object. */
8178 if (unresolved_reloc)
8179 {
8180 if (! (*info->callbacks->undefined_symbol) (info,
8181 h->root.root.string,
8182 input_bfd,
8183 input_section,
8184 rel->r_offset,
8185 TRUE))
8186 return FALSE;
8187 continue;
8188 }
8189 break;
8190
8191 case R_PPC_DTPREL16:
8192 case R_PPC_DTPREL16_LO:
8193 case R_PPC_DTPREL16_HI:
8194 case R_PPC_DTPREL16_HA:
8195 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8196 break;
8197
8198 /* Relocations that may need to be propagated if this is a shared
8199 object. */
8200 case R_PPC_TPREL16:
8201 case R_PPC_TPREL16_LO:
8202 case R_PPC_TPREL16_HI:
8203 case R_PPC_TPREL16_HA:
8204 if (h != NULL
8205 && h->root.type == bfd_link_hash_undefweak
8206 && h->dynindx == -1)
8207 {
8208 /* Make this relocation against an undefined weak symbol
8209 resolve to zero. This is really just a tweak, since
8210 code using weak externs ought to check that they are
8211 defined before using them. */
8212 bfd_byte *p = contents + rel->r_offset - d_offset;
8213 unsigned int insn = bfd_get_32 (output_bfd, p);
8214 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8215 if (insn != 0)
8216 bfd_put_32 (output_bfd, insn, p);
8217 break;
8218 }
8219 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8220 /* The TPREL16 relocs shouldn't really be used in shared
8221 libs as they will result in DT_TEXTREL being set, but
8222 support them anyway. */
8223 goto dodyn;
8224
8225 case R_PPC_TPREL32:
8226 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8227 goto dodyn;
8228
8229 case R_PPC_DTPREL32:
8230 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8231 goto dodyn;
8232
8233 case R_PPC_DTPMOD32:
8234 relocation = 1;
8235 addend = 0;
8236 goto dodyn;
8237
8238 case R_PPC_REL16:
8239 case R_PPC_REL16_LO:
8240 case R_PPC_REL16_HI:
8241 case R_PPC_REL16_HA:
8242 break;
8243
8244 case R_PPC_REL32:
8245 if (h == NULL || h == htab->elf.hgot)
8246 break;
8247 /* fall through */
8248
8249 case R_PPC_ADDR32:
8250 case R_PPC_ADDR16:
8251 case R_PPC_ADDR16_LO:
8252 case R_PPC_ADDR16_HI:
8253 case R_PPC_ADDR16_HA:
8254 case R_PPC_UADDR32:
8255 case R_PPC_UADDR16:
8256 goto dodyn;
8257
8258 case R_PPC_VLE_REL8:
8259 case R_PPC_VLE_REL15:
8260 case R_PPC_VLE_REL24:
8261 case R_PPC_REL24:
8262 case R_PPC_REL14:
8263 case R_PPC_REL14_BRTAKEN:
8264 case R_PPC_REL14_BRNTAKEN:
8265 /* If these relocations are not to a named symbol, they can be
8266 handled right here, no need to bother the dynamic linker. */
8267 if (SYMBOL_CALLS_LOCAL (info, h)
8268 || h == htab->elf.hgot)
8269 break;
8270 /* fall through */
8271
8272 case R_PPC_ADDR24:
8273 case R_PPC_ADDR14:
8274 case R_PPC_ADDR14_BRTAKEN:
8275 case R_PPC_ADDR14_BRNTAKEN:
8276 if (h != NULL && !info->shared)
8277 break;
8278 /* fall through */
8279
8280 dodyn:
8281 if ((input_section->flags & SEC_ALLOC) == 0
8282 || is_vxworks_tls)
8283 break;
8284
8285 if ((info->shared
8286 && !(h != NULL
8287 && ((h->root.type == bfd_link_hash_undefined
8288 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8289 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8290 || (h->root.type == bfd_link_hash_undefweak
8291 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8292 && (must_be_dyn_reloc (info, r_type)
8293 || !SYMBOL_CALLS_LOCAL (info, h)))
8294 || (ELIMINATE_COPY_RELOCS
8295 && !info->shared
8296 && h != NULL
8297 && h->dynindx != -1
8298 && !h->non_got_ref
8299 && !h->def_regular))
8300 {
8301 int skip;
8302 bfd_byte *loc;
8303 asection *sreloc;
8304 #ifdef DEBUG
8305 fprintf (stderr, "ppc_elf_relocate_section needs to "
8306 "create relocation for %s\n",
8307 (h && h->root.root.string
8308 ? h->root.root.string : "<unknown>"));
8309 #endif
8310
8311 /* When generating a shared object, these relocations
8312 are copied into the output file to be resolved at run
8313 time. */
8314 sreloc = elf_section_data (input_section)->sreloc;
8315 if (ifunc)
8316 sreloc = htab->reliplt;
8317 if (sreloc == NULL)
8318 return FALSE;
8319
8320 skip = 0;
8321 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8322 input_section,
8323 rel->r_offset);
8324 if (outrel.r_offset == (bfd_vma) -1
8325 || outrel.r_offset == (bfd_vma) -2)
8326 skip = (int) outrel.r_offset;
8327 outrel.r_offset += (input_section->output_section->vma
8328 + input_section->output_offset);
8329
8330 if (skip)
8331 memset (&outrel, 0, sizeof outrel);
8332 else if ((h != NULL
8333 && (h->root.type == bfd_link_hash_undefined
8334 || h->root.type == bfd_link_hash_undefweak))
8335 || !SYMBOL_REFERENCES_LOCAL (info, h))
8336 {
8337 BFD_ASSERT (h->dynindx != -1);
8338 unresolved_reloc = FALSE;
8339 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8340 outrel.r_addend = rel->r_addend;
8341 }
8342 else
8343 {
8344 outrel.r_addend = relocation + rel->r_addend;
8345
8346 if (r_type != R_PPC_ADDR32)
8347 {
8348 long indx = 0;
8349
8350 if (ifunc != NULL)
8351 {
8352 /* If we get here when building a static
8353 executable, then the libc startup function
8354 responsible for applying indirect function
8355 relocations is going to complain about
8356 the reloc type.
8357 If we get here when building a dynamic
8358 executable, it will be because we have
8359 a text relocation. The dynamic loader
8360 will set the text segment writable and
8361 non-executable to apply text relocations.
8362 So we'll segfault when trying to run the
8363 indirection function to resolve the reloc. */
8364 info->callbacks->einfo
8365 (_("%P: %H: relocation %s for indirect "
8366 "function %s unsupported\n"),
8367 input_bfd, input_section, rel->r_offset,
8368 howto->name,
8369 sym_name);
8370 ret = FALSE;
8371 }
8372 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8373 ;
8374 else if (sec == NULL || sec->owner == NULL)
8375 {
8376 bfd_set_error (bfd_error_bad_value);
8377 ret = FALSE;
8378 }
8379 else
8380 {
8381 asection *osec;
8382
8383 /* We are turning this relocation into one
8384 against a section symbol. It would be
8385 proper to subtract the symbol's value,
8386 osec->vma, from the emitted reloc addend,
8387 but ld.so expects buggy relocs.
8388 FIXME: Why not always use a zero index? */
8389 osec = sec->output_section;
8390 indx = elf_section_data (osec)->dynindx;
8391 if (indx == 0)
8392 {
8393 osec = htab->elf.text_index_section;
8394 indx = elf_section_data (osec)->dynindx;
8395 }
8396 BFD_ASSERT (indx != 0);
8397 #ifdef DEBUG
8398 if (indx == 0)
8399 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8400 indx, osec->name, osec->flags,
8401 h->root.root.string);
8402 #endif
8403 }
8404
8405 outrel.r_info = ELF32_R_INFO (indx, r_type);
8406 }
8407 else if (ifunc != NULL)
8408 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8409 else
8410 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8411 }
8412
8413 loc = sreloc->contents;
8414 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8415 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8416
8417 if (skip == -1)
8418 continue;
8419
8420 /* This reloc will be computed at runtime. We clear the memory
8421 so that it contains predictable value. */
8422 if (! skip
8423 && ((input_section->flags & SEC_ALLOC) != 0
8424 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8425 {
8426 relocation = howto->pc_relative ? outrel.r_offset : 0;
8427 addend = 0;
8428 break;
8429 }
8430 }
8431 break;
8432
8433 case R_PPC_RELAX_PLT:
8434 case R_PPC_RELAX_PLTREL24:
8435 if (h != NULL)
8436 {
8437 struct plt_entry *ent;
8438 bfd_vma got2_addend = 0;
8439
8440 if (r_type == R_PPC_RELAX_PLTREL24)
8441 {
8442 if (info->shared)
8443 got2_addend = addend;
8444 addend = 0;
8445 }
8446 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8447 if (htab->plt_type == PLT_NEW)
8448 relocation = (htab->glink->output_section->vma
8449 + htab->glink->output_offset
8450 + ent->glink_offset);
8451 else
8452 relocation = (htab->plt->output_section->vma
8453 + htab->plt->output_offset
8454 + ent->plt.offset);
8455 }
8456 /* Fall thru */
8457
8458 case R_PPC_RELAX:
8459 if (info->shared)
8460 relocation -= (input_section->output_section->vma
8461 + input_section->output_offset
8462 + rel->r_offset - 4);
8463
8464 {
8465 unsigned long t0;
8466 unsigned long t1;
8467
8468 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
8469 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
8470
8471 /* We're clearing the bits for R_PPC_ADDR16_HA
8472 and R_PPC_ADDR16_LO here. */
8473 t0 &= ~0xffff;
8474 t1 &= ~0xffff;
8475
8476 /* t0 is HA, t1 is LO */
8477 relocation += addend;
8478 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
8479 t1 |= relocation & 0xffff;
8480
8481 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
8482 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
8483
8484 /* Rewrite the reloc and convert one of the trailing nop
8485 relocs to describe this relocation. */
8486 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8487 /* The relocs are at the bottom 2 bytes */
8488 rel[0].r_offset += 2;
8489 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8490 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8491 rel[1].r_offset += 4;
8492 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8493 rel++;
8494 }
8495 continue;
8496
8497 /* Indirect .sdata relocation. */
8498 case R_PPC_EMB_SDAI16:
8499 BFD_ASSERT (htab->sdata[0].section != NULL);
8500 if (!is_static_defined (htab->sdata[0].sym))
8501 {
8502 unresolved_reloc = TRUE;
8503 break;
8504 }
8505 relocation
8506 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8507 h, relocation, rel);
8508 addend = 0;
8509 break;
8510
8511 /* Indirect .sdata2 relocation. */
8512 case R_PPC_EMB_SDA2I16:
8513 BFD_ASSERT (htab->sdata[1].section != NULL);
8514 if (!is_static_defined (htab->sdata[1].sym))
8515 {
8516 unresolved_reloc = TRUE;
8517 break;
8518 }
8519 relocation
8520 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8521 h, relocation, rel);
8522 addend = 0;
8523 break;
8524
8525 /* Handle the TOC16 reloc. We want to use the offset within the .got
8526 section, not the actual VMA. This is appropriate when generating
8527 an embedded ELF object, for which the .got section acts like the
8528 AIX .toc section. */
8529 case R_PPC_TOC16: /* phony GOT16 relocations */
8530 if (sec == NULL || sec->output_section == NULL)
8531 {
8532 unresolved_reloc = TRUE;
8533 break;
8534 }
8535 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8536 ".got") == 0
8537 || strcmp (bfd_get_section_name (sec->owner, sec),
8538 ".cgot") == 0);
8539
8540 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8541 break;
8542
8543 case R_PPC_PLTREL24:
8544 if (h != NULL && ifunc == NULL)
8545 {
8546 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8547 info->shared ? addend : 0);
8548 if (ent == NULL
8549 || htab->plt == NULL)
8550 {
8551 /* We didn't make a PLT entry for this symbol. This
8552 happens when statically linking PIC code, or when
8553 using -Bsymbolic. */
8554 }
8555 else
8556 {
8557 /* Relocation is to the entry for this symbol in the
8558 procedure linkage table. */
8559 unresolved_reloc = FALSE;
8560 if (htab->plt_type == PLT_NEW)
8561 relocation = (htab->glink->output_section->vma
8562 + htab->glink->output_offset
8563 + ent->glink_offset);
8564 else
8565 relocation = (htab->plt->output_section->vma
8566 + htab->plt->output_offset
8567 + ent->plt.offset);
8568 }
8569 }
8570
8571 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8572 addend specifies the GOT pointer offset within .got2.
8573 Don't apply it to the relocation field. */
8574 addend = 0;
8575 break;
8576
8577 /* Relocate against _SDA_BASE_. */
8578 case R_PPC_SDAREL16:
8579 {
8580 const char *name;
8581 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8582
8583 if (sec == NULL
8584 || sec->output_section == NULL
8585 || !is_static_defined (sda))
8586 {
8587 unresolved_reloc = TRUE;
8588 break;
8589 }
8590 addend -= SYM_VAL (sda);
8591
8592 name = bfd_get_section_name (output_bfd, sec->output_section);
8593 if (! ((CONST_STRNEQ (name, ".sdata")
8594 && (name[6] == 0 || name[6] == '.'))
8595 || (CONST_STRNEQ (name, ".sbss")
8596 && (name[5] == 0 || name[5] == '.'))))
8597 {
8598 info->callbacks->einfo
8599 (_("%P: %B: the target (%s) of a %s relocation is "
8600 "in the wrong output section (%s)\n"),
8601 input_bfd,
8602 sym_name,
8603 howto->name,
8604 name);
8605 }
8606 }
8607 break;
8608
8609 /* Relocate against _SDA2_BASE_. */
8610 case R_PPC_EMB_SDA2REL:
8611 {
8612 const char *name;
8613 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8614
8615 if (sec == NULL
8616 || sec->output_section == NULL
8617 || !is_static_defined (sda))
8618 {
8619 unresolved_reloc = TRUE;
8620 break;
8621 }
8622 addend -= SYM_VAL (sda);
8623
8624 name = bfd_get_section_name (output_bfd, sec->output_section);
8625 if (! (CONST_STRNEQ (name, ".sdata2")
8626 || CONST_STRNEQ (name, ".sbss2")))
8627 {
8628 info->callbacks->einfo
8629 (_("%P: %B: the target (%s) of a %s relocation is "
8630 "in the wrong output section (%s)\n"),
8631 input_bfd,
8632 sym_name,
8633 howto->name,
8634 name);
8635 }
8636 }
8637 break;
8638
8639 case R_PPC_VLE_LO16A:
8640 relocation = (relocation + addend) & 0xffff;
8641 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8642 relocation, split16a_type);
8643 continue;
8644
8645 case R_PPC_VLE_LO16D:
8646 relocation = (relocation + addend) & 0xffff;
8647 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8648 relocation, split16d_type);
8649 continue;
8650
8651 case R_PPC_VLE_HI16A:
8652 relocation = ((relocation + addend) >> 16) & 0xffff;
8653 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8654 relocation, split16a_type);
8655 continue;
8656
8657 case R_PPC_VLE_HI16D:
8658 relocation = ((relocation + addend) >> 16) & 0xffff;
8659 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8660 relocation, split16d_type);
8661 continue;
8662
8663 case R_PPC_VLE_HA16A:
8664 {
8665 bfd_vma value = relocation + addend;
8666 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8667 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8668 value, split16a_type);
8669 }
8670 continue;
8671
8672 case R_PPC_VLE_HA16D:
8673 {
8674 bfd_vma value = relocation + addend;
8675 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8676 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8677 value, split16d_type);
8678 }
8679 continue;
8680
8681 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8682 case R_PPC_EMB_SDA21:
8683 case R_PPC_VLE_SDA21:
8684 case R_PPC_EMB_RELSDA:
8685 case R_PPC_VLE_SDA21_LO:
8686 {
8687 const char *name;
8688 int reg;
8689 struct elf_link_hash_entry *sda = NULL;
8690
8691 if (sec == NULL || sec->output_section == NULL)
8692 {
8693 unresolved_reloc = TRUE;
8694 break;
8695 }
8696
8697 name = bfd_get_section_name (output_bfd, sec->output_section);
8698 if (((CONST_STRNEQ (name, ".sdata")
8699 && (name[6] == 0 || name[6] == '.'))
8700 || (CONST_STRNEQ (name, ".sbss")
8701 && (name[5] == 0 || name[5] == '.'))))
8702 {
8703 reg = 13;
8704 sda = htab->sdata[0].sym;
8705 }
8706 else if (CONST_STRNEQ (name, ".sdata2")
8707 || CONST_STRNEQ (name, ".sbss2"))
8708 {
8709 reg = 2;
8710 sda = htab->sdata[1].sym;
8711 }
8712 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8713 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8714 {
8715 reg = 0;
8716 }
8717 else
8718 {
8719 info->callbacks->einfo
8720 (_("%P: %B: the target (%s) of a %s relocation is "
8721 "in the wrong output section (%s)\n"),
8722 input_bfd,
8723 sym_name,
8724 howto->name,
8725 name);
8726
8727 bfd_set_error (bfd_error_bad_value);
8728 ret = FALSE;
8729 continue;
8730 }
8731
8732 if (sda != NULL)
8733 {
8734 if (!is_static_defined (sda))
8735 {
8736 unresolved_reloc = TRUE;
8737 break;
8738 }
8739 addend -= SYM_VAL (sda);
8740 }
8741
8742 if (reg == 0
8743 && (r_type == R_PPC_VLE_SDA21
8744 || r_type == R_PPC_VLE_SDA21_LO))
8745 {
8746 /* Use the split20 format. */
8747 bfd_vma insn, bits12to15, bits21to31;
8748 bfd_vma value = (relocation + rel->r_offset) & 0xffff;
8749 /* Propagate sign bit, if necessary. */
8750 insn = (value & 0x8000) ? 0x70107800 : 0x70000000;
8751 bits12to15 = value & 0x700;
8752 bits21to31 = value & 0x7ff;
8753 insn |= bits12to15;
8754 insn |= bits21to31;
8755 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8756 continue;
8757 }
8758 else if (r_type == R_PPC_EMB_SDA21
8759 || r_type == R_PPC_VLE_SDA21
8760 || r_type == R_PPC_VLE_SDA21_LO)
8761 {
8762 bfd_vma insn; /* Fill in register field. */
8763
8764 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8765 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8766 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8767 }
8768 }
8769 break;
8770
8771 case R_PPC_VLE_SDAREL_LO16A:
8772 case R_PPC_VLE_SDAREL_LO16D:
8773 case R_PPC_VLE_SDAREL_HI16A:
8774 case R_PPC_VLE_SDAREL_HI16D:
8775 case R_PPC_VLE_SDAREL_HA16A:
8776 case R_PPC_VLE_SDAREL_HA16D:
8777 {
8778 bfd_vma value;
8779 const char *name;
8780 //int reg;
8781 struct elf_link_hash_entry *sda = NULL;
8782
8783 if (sec == NULL || sec->output_section == NULL)
8784 {
8785 unresolved_reloc = TRUE;
8786 break;
8787 }
8788
8789 name = bfd_get_section_name (output_bfd, sec->output_section);
8790 if (((CONST_STRNEQ (name, ".sdata")
8791 && (name[6] == 0 || name[6] == '.'))
8792 || (CONST_STRNEQ (name, ".sbss")
8793 && (name[5] == 0 || name[5] == '.'))))
8794 {
8795 //reg = 13;
8796 sda = htab->sdata[0].sym;
8797 }
8798 else if (CONST_STRNEQ (name, ".sdata2")
8799 || CONST_STRNEQ (name, ".sbss2"))
8800 {
8801 //reg = 2;
8802 sda = htab->sdata[1].sym;
8803 }
8804 else
8805 {
8806 (*_bfd_error_handler)
8807 (_("%B: the target (%s) of a %s relocation is "
8808 "in the wrong output section (%s)"),
8809 input_bfd,
8810 sym_name,
8811 howto->name,
8812 name);
8813
8814 bfd_set_error (bfd_error_bad_value);
8815 ret = FALSE;
8816 continue;
8817 }
8818
8819 if (sda != NULL)
8820 {
8821 if (!is_static_defined (sda))
8822 {
8823 unresolved_reloc = TRUE;
8824 break;
8825 }
8826 }
8827
8828 value = sda->root.u.def.section->output_section->vma
8829 + sda->root.u.def.section->output_offset;
8830
8831 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8832 {
8833 value = (value + addend) & 0xffff;
8834 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8835 value, split16a_type);
8836 }
8837 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8838 {
8839 value = (value + addend) & 0xffff;
8840 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8841 value, split16d_type);
8842 }
8843 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8844 {
8845 value = ((value + addend) >> 16) & 0xffff;
8846 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8847 value, split16a_type);
8848 }
8849 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8850 {
8851 value = ((value + addend) >> 16) & 0xffff;
8852 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8853 value, split16d_type);
8854 }
8855 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8856 {
8857 value += addend;
8858 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8859 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8860 value, split16a_type);
8861 }
8862 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8863 {
8864 value += addend;
8865 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8866 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8867 value, split16d_type);
8868 }
8869 }
8870 continue;
8871
8872 /* Relocate against the beginning of the section. */
8873 case R_PPC_SECTOFF:
8874 case R_PPC_SECTOFF_LO:
8875 case R_PPC_SECTOFF_HI:
8876 case R_PPC_SECTOFF_HA:
8877 if (sec == NULL || sec->output_section == NULL)
8878 {
8879 unresolved_reloc = TRUE;
8880 break;
8881 }
8882 addend -= sec->output_section->vma;
8883 break;
8884
8885 /* Negative relocations. */
8886 case R_PPC_EMB_NADDR32:
8887 case R_PPC_EMB_NADDR16:
8888 case R_PPC_EMB_NADDR16_LO:
8889 case R_PPC_EMB_NADDR16_HI:
8890 case R_PPC_EMB_NADDR16_HA:
8891 addend -= 2 * relocation;
8892 break;
8893
8894 case R_PPC_COPY:
8895 case R_PPC_GLOB_DAT:
8896 case R_PPC_JMP_SLOT:
8897 case R_PPC_RELATIVE:
8898 case R_PPC_IRELATIVE:
8899 case R_PPC_PLT32:
8900 case R_PPC_PLTREL32:
8901 case R_PPC_PLT16_LO:
8902 case R_PPC_PLT16_HI:
8903 case R_PPC_PLT16_HA:
8904 case R_PPC_ADDR30:
8905 case R_PPC_EMB_RELSEC16:
8906 case R_PPC_EMB_RELST_LO:
8907 case R_PPC_EMB_RELST_HI:
8908 case R_PPC_EMB_RELST_HA:
8909 case R_PPC_EMB_BIT_FLD:
8910 info->callbacks->einfo
8911 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
8912 input_bfd,
8913 howto->name,
8914 sym_name);
8915
8916 bfd_set_error (bfd_error_invalid_operation);
8917 ret = FALSE;
8918 continue;
8919 }
8920
8921 /* Do any further special processing. */
8922 switch (r_type)
8923 {
8924 default:
8925 break;
8926
8927 case R_PPC_ADDR16_HA:
8928 case R_PPC_REL16_HA:
8929 case R_PPC_SECTOFF_HA:
8930 case R_PPC_TPREL16_HA:
8931 case R_PPC_DTPREL16_HA:
8932 case R_PPC_EMB_NADDR16_HA:
8933 case R_PPC_EMB_RELST_HA:
8934 /* It's just possible that this symbol is a weak symbol
8935 that's not actually defined anywhere. In that case,
8936 'sec' would be NULL, and we should leave the symbol
8937 alone (it will be set to zero elsewhere in the link). */
8938 if (sec == NULL)
8939 break;
8940 /* Fall thru */
8941
8942 case R_PPC_PLT16_HA:
8943 case R_PPC_GOT16_HA:
8944 case R_PPC_GOT_TLSGD16_HA:
8945 case R_PPC_GOT_TLSLD16_HA:
8946 case R_PPC_GOT_TPREL16_HA:
8947 case R_PPC_GOT_DTPREL16_HA:
8948 /* Add 0x10000 if sign bit in 0:15 is set.
8949 Bits 0:15 are not used. */
8950 addend += 0x8000;
8951 break;
8952
8953 case R_PPC_ADDR16:
8954 case R_PPC_ADDR16_LO:
8955 case R_PPC_GOT16:
8956 case R_PPC_GOT16_LO:
8957 case R_PPC_SDAREL16:
8958 case R_PPC_SECTOFF:
8959 case R_PPC_SECTOFF_LO:
8960 case R_PPC_DTPREL16:
8961 case R_PPC_DTPREL16_LO:
8962 case R_PPC_TPREL16:
8963 case R_PPC_TPREL16_LO:
8964 case R_PPC_GOT_TLSGD16:
8965 case R_PPC_GOT_TLSGD16_LO:
8966 case R_PPC_GOT_TLSLD16:
8967 case R_PPC_GOT_TLSLD16_LO:
8968 case R_PPC_GOT_DTPREL16:
8969 case R_PPC_GOT_DTPREL16_LO:
8970 case R_PPC_GOT_TPREL16:
8971 case R_PPC_GOT_TPREL16_LO:
8972 {
8973 /* The 32-bit ABI lacks proper relocations to deal with
8974 certain 64-bit instructions. Prevent damage to bits
8975 that make up part of the insn opcode. */
8976 unsigned int insn, mask, lobit;
8977
8978 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
8979 mask = 0;
8980 if (is_insn_ds_form (insn))
8981 mask = 3;
8982 else if (is_insn_dq_form (insn))
8983 mask = 15;
8984 else
8985 break;
8986 lobit = mask & (relocation + addend);
8987 if (lobit != 0)
8988 {
8989 addend -= lobit;
8990 info->callbacks->einfo
8991 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
8992 input_bfd, input_section, rel->r_offset,
8993 howto->name, sym_name, mask + 1);
8994 bfd_set_error (bfd_error_bad_value);
8995 ret = FALSE;
8996 }
8997 addend += insn & mask;
8998 }
8999 break;
9000 }
9001
9002 #ifdef DEBUG
9003 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9004 "offset = %ld, addend = %ld\n",
9005 howto->name,
9006 (int) r_type,
9007 sym_name,
9008 r_symndx,
9009 (long) rel->r_offset,
9010 (long) addend);
9011 #endif
9012
9013 if (unresolved_reloc
9014 && !((input_section->flags & SEC_DEBUGGING) != 0
9015 && h->def_dynamic)
9016 && _bfd_elf_section_offset (output_bfd, info, input_section,
9017 rel->r_offset) != (bfd_vma) -1)
9018 {
9019 info->callbacks->einfo
9020 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9021 input_bfd, input_section, rel->r_offset,
9022 howto->name,
9023 sym_name);
9024 ret = FALSE;
9025 }
9026
9027 r = _bfd_final_link_relocate (howto,
9028 input_bfd,
9029 input_section,
9030 contents,
9031 rel->r_offset,
9032 relocation,
9033 addend);
9034
9035 if (r != bfd_reloc_ok)
9036 {
9037 if (r == bfd_reloc_overflow)
9038 {
9039 if (warned)
9040 continue;
9041 if (h != NULL
9042 && h->root.type == bfd_link_hash_undefweak
9043 && howto->pc_relative)
9044 {
9045 /* Assume this is a call protected by other code that
9046 detect the symbol is undefined. If this is the case,
9047 we can safely ignore the overflow. If not, the
9048 program is hosed anyway, and a little warning isn't
9049 going to help. */
9050
9051 continue;
9052 }
9053
9054 if (! (*info->callbacks->reloc_overflow) (info,
9055 (h ? &h->root : NULL),
9056 sym_name,
9057 howto->name,
9058 rel->r_addend,
9059 input_bfd,
9060 input_section,
9061 rel->r_offset))
9062 return FALSE;
9063 }
9064 else
9065 {
9066 info->callbacks->einfo
9067 (_("%P: %H: %s reloc against `%s': error %d\n"),
9068 input_bfd, input_section, rel->r_offset,
9069 howto->name, sym_name, (int) r);
9070 ret = FALSE;
9071 }
9072 }
9073 }
9074
9075 #ifdef DEBUG
9076 fprintf (stderr, "\n");
9077 #endif
9078
9079 return ret;
9080 }
9081 \f
9082 /* Finish up dynamic symbol handling. We set the contents of various
9083 dynamic sections here. */
9084
9085 static bfd_boolean
9086 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9087 struct bfd_link_info *info,
9088 struct elf_link_hash_entry *h,
9089 Elf_Internal_Sym *sym)
9090 {
9091 struct ppc_elf_link_hash_table *htab;
9092 struct plt_entry *ent;
9093 bfd_boolean doneone;
9094
9095 #ifdef DEBUG
9096 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9097 h->root.root.string);
9098 #endif
9099
9100 htab = ppc_elf_hash_table (info);
9101 BFD_ASSERT (htab->elf.dynobj != NULL);
9102
9103 doneone = FALSE;
9104 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9105 if (ent->plt.offset != (bfd_vma) -1)
9106 {
9107 if (!doneone)
9108 {
9109 Elf_Internal_Rela rela;
9110 bfd_byte *loc;
9111 bfd_vma reloc_index;
9112
9113 if (htab->plt_type == PLT_NEW
9114 || !htab->elf.dynamic_sections_created
9115 || h->dynindx == -1)
9116 reloc_index = ent->plt.offset / 4;
9117 else
9118 {
9119 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9120 / htab->plt_slot_size);
9121 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9122 && htab->plt_type == PLT_OLD)
9123 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9124 }
9125
9126 /* This symbol has an entry in the procedure linkage table.
9127 Set it up. */
9128 if (htab->plt_type == PLT_VXWORKS
9129 && htab->elf.dynamic_sections_created
9130 && h->dynindx != -1)
9131 {
9132 bfd_vma got_offset;
9133 const bfd_vma *plt_entry;
9134
9135 /* The first three entries in .got.plt are reserved. */
9136 got_offset = (reloc_index + 3) * 4;
9137
9138 /* Use the right PLT. */
9139 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9140 : ppc_elf_vxworks_plt_entry;
9141
9142 /* Fill in the .plt on VxWorks. */
9143 if (info->shared)
9144 {
9145 bfd_put_32 (output_bfd,
9146 plt_entry[0] | PPC_HA (got_offset),
9147 htab->plt->contents + ent->plt.offset + 0);
9148 bfd_put_32 (output_bfd,
9149 plt_entry[1] | PPC_LO (got_offset),
9150 htab->plt->contents + ent->plt.offset + 4);
9151 }
9152 else
9153 {
9154 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9155
9156 bfd_put_32 (output_bfd,
9157 plt_entry[0] | PPC_HA (got_loc),
9158 htab->plt->contents + ent->plt.offset + 0);
9159 bfd_put_32 (output_bfd,
9160 plt_entry[1] | PPC_LO (got_loc),
9161 htab->plt->contents + ent->plt.offset + 4);
9162 }
9163
9164 bfd_put_32 (output_bfd, plt_entry[2],
9165 htab->plt->contents + ent->plt.offset + 8);
9166 bfd_put_32 (output_bfd, plt_entry[3],
9167 htab->plt->contents + ent->plt.offset + 12);
9168
9169 /* This instruction is an immediate load. The value loaded is
9170 the byte offset of the R_PPC_JMP_SLOT relocation from the
9171 start of the .rela.plt section. The value is stored in the
9172 low-order 16 bits of the load instruction. */
9173 /* NOTE: It appears that this is now an index rather than a
9174 prescaled offset. */
9175 bfd_put_32 (output_bfd,
9176 plt_entry[4] | reloc_index,
9177 htab->plt->contents + ent->plt.offset + 16);
9178 /* This instruction is a PC-relative branch whose target is
9179 the start of the PLT section. The address of this branch
9180 instruction is 20 bytes beyond the start of this PLT entry.
9181 The address is encoded in bits 6-29, inclusive. The value
9182 stored is right-shifted by two bits, permitting a 26-bit
9183 offset. */
9184 bfd_put_32 (output_bfd,
9185 (plt_entry[5]
9186 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9187 htab->plt->contents + ent->plt.offset + 20);
9188 bfd_put_32 (output_bfd, plt_entry[6],
9189 htab->plt->contents + ent->plt.offset + 24);
9190 bfd_put_32 (output_bfd, plt_entry[7],
9191 htab->plt->contents + ent->plt.offset + 28);
9192
9193 /* Fill in the GOT entry corresponding to this PLT slot with
9194 the address immediately after the "bctr" instruction
9195 in this PLT entry. */
9196 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9197 + htab->plt->output_offset
9198 + ent->plt.offset + 16),
9199 htab->sgotplt->contents + got_offset);
9200
9201 if (!info->shared)
9202 {
9203 /* Fill in a couple of entries in .rela.plt.unloaded. */
9204 loc = htab->srelplt2->contents
9205 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9206 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9207 * sizeof (Elf32_External_Rela));
9208
9209 /* Provide the @ha relocation for the first instruction. */
9210 rela.r_offset = (htab->plt->output_section->vma
9211 + htab->plt->output_offset
9212 + ent->plt.offset + 2);
9213 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9214 R_PPC_ADDR16_HA);
9215 rela.r_addend = got_offset;
9216 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9217 loc += sizeof (Elf32_External_Rela);
9218
9219 /* Provide the @l relocation for the second instruction. */
9220 rela.r_offset = (htab->plt->output_section->vma
9221 + htab->plt->output_offset
9222 + ent->plt.offset + 6);
9223 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9224 R_PPC_ADDR16_LO);
9225 rela.r_addend = got_offset;
9226 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9227 loc += sizeof (Elf32_External_Rela);
9228
9229 /* Provide a relocation for the GOT entry corresponding to this
9230 PLT slot. Point it at the middle of the .plt entry. */
9231 rela.r_offset = (htab->sgotplt->output_section->vma
9232 + htab->sgotplt->output_offset
9233 + got_offset);
9234 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9235 R_PPC_ADDR32);
9236 rela.r_addend = ent->plt.offset + 16;
9237 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9238 }
9239
9240 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9241 In particular, the offset for the relocation is not the
9242 address of the PLT entry for this function, as specified
9243 by the ABI. Instead, the offset is set to the address of
9244 the GOT slot for this function. See EABI 4.4.4.1. */
9245 rela.r_offset = (htab->sgotplt->output_section->vma
9246 + htab->sgotplt->output_offset
9247 + got_offset);
9248
9249 }
9250 else
9251 {
9252 asection *splt = htab->plt;
9253 if (!htab->elf.dynamic_sections_created
9254 || h->dynindx == -1)
9255 splt = htab->iplt;
9256
9257 rela.r_offset = (splt->output_section->vma
9258 + splt->output_offset
9259 + ent->plt.offset);
9260 if (htab->plt_type == PLT_OLD
9261 || !htab->elf.dynamic_sections_created
9262 || h->dynindx == -1)
9263 {
9264 /* We don't need to fill in the .plt. The ppc dynamic
9265 linker will fill it in. */
9266 }
9267 else
9268 {
9269 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9270 + htab->glink->output_section->vma
9271 + htab->glink->output_offset);
9272 bfd_put_32 (output_bfd, val,
9273 splt->contents + ent->plt.offset);
9274 }
9275 }
9276
9277 /* Fill in the entry in the .rela.plt section. */
9278 rela.r_addend = 0;
9279 if (!htab->elf.dynamic_sections_created
9280 || h->dynindx == -1)
9281 {
9282 BFD_ASSERT (h->type == STT_GNU_IFUNC
9283 && h->def_regular
9284 && (h->root.type == bfd_link_hash_defined
9285 || h->root.type == bfd_link_hash_defweak));
9286 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9287 rela.r_addend = SYM_VAL (h);
9288 }
9289 else
9290 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9291
9292 if (!htab->elf.dynamic_sections_created
9293 || h->dynindx == -1)
9294 loc = (htab->reliplt->contents
9295 + (htab->reliplt->reloc_count++
9296 * sizeof (Elf32_External_Rela)));
9297 else
9298 loc = (htab->relplt->contents
9299 + reloc_index * sizeof (Elf32_External_Rela));
9300 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9301
9302 if (!h->def_regular)
9303 {
9304 /* Mark the symbol as undefined, rather than as
9305 defined in the .plt section. Leave the value if
9306 there were any relocations where pointer equality
9307 matters (this is a clue for the dynamic linker, to
9308 make function pointer comparisons work between an
9309 application and shared library), otherwise set it
9310 to zero. */
9311 sym->st_shndx = SHN_UNDEF;
9312 if (!h->pointer_equality_needed)
9313 sym->st_value = 0;
9314 else if (!h->ref_regular_nonweak)
9315 {
9316 /* This breaks function pointer comparisons, but
9317 that is better than breaking tests for a NULL
9318 function pointer. */
9319 sym->st_value = 0;
9320 }
9321 }
9322 else if (h->type == STT_GNU_IFUNC
9323 && !info->shared)
9324 {
9325 /* Set the value of ifunc symbols in a non-pie
9326 executable to the glink entry. This is to avoid
9327 text relocations. We can't do this for ifunc in
9328 allocate_dynrelocs, as we do for normal dynamic
9329 function symbols with plt entries, because we need
9330 to keep the original value around for the ifunc
9331 relocation. */
9332 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9333 (output_bfd, htab->glink->output_section));
9334 sym->st_value = (ent->glink_offset
9335 + htab->glink->output_offset
9336 + htab->glink->output_section->vma);
9337 }
9338 doneone = TRUE;
9339 }
9340
9341 if (htab->plt_type == PLT_NEW
9342 || !htab->elf.dynamic_sections_created
9343 || h->dynindx == -1)
9344 {
9345 unsigned char *p;
9346 asection *splt = htab->plt;
9347 if (!htab->elf.dynamic_sections_created
9348 || h->dynindx == -1)
9349 splt = htab->iplt;
9350
9351 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9352
9353 if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
9354 {
9355 bfd_put_32 (output_bfd, LWZ_11_3, p);
9356 p += 4;
9357 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9358 p += 4;
9359 bfd_put_32 (output_bfd, MR_0_3, p);
9360 p += 4;
9361 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9362 p += 4;
9363 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9364 p += 4;
9365 bfd_put_32 (output_bfd, BEQLR, p);
9366 p += 4;
9367 bfd_put_32 (output_bfd, MR_3_0, p);
9368 p += 4;
9369 bfd_put_32 (output_bfd, NOP, p);
9370 p += 4;
9371 }
9372
9373 write_glink_stub (ent, splt, p, info);
9374
9375 if (!info->shared)
9376 /* We only need one non-PIC glink stub. */
9377 break;
9378 }
9379 else
9380 break;
9381 }
9382
9383 if (h->needs_copy)
9384 {
9385 asection *s;
9386 Elf_Internal_Rela rela;
9387 bfd_byte *loc;
9388
9389 /* This symbols needs a copy reloc. Set it up. */
9390
9391 #ifdef DEBUG
9392 fprintf (stderr, ", copy");
9393 #endif
9394
9395 BFD_ASSERT (h->dynindx != -1);
9396
9397 if (ppc_elf_hash_entry (h)->has_sda_refs)
9398 s = htab->relsbss;
9399 else
9400 s = htab->relbss;
9401 BFD_ASSERT (s != NULL);
9402
9403 rela.r_offset = SYM_VAL (h);
9404 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9405 rela.r_addend = 0;
9406 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9407 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9408 }
9409
9410 #ifdef DEBUG
9411 fprintf (stderr, "\n");
9412 #endif
9413
9414 return TRUE;
9415 }
9416 \f
9417 static enum elf_reloc_type_class
9418 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9419 const asection *rel_sec,
9420 const Elf_Internal_Rela *rela)
9421 {
9422 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9423
9424 if (rel_sec == htab->reliplt)
9425 return reloc_class_ifunc;
9426
9427 switch (ELF32_R_TYPE (rela->r_info))
9428 {
9429 case R_PPC_RELATIVE:
9430 return reloc_class_relative;
9431 case R_PPC_JMP_SLOT:
9432 return reloc_class_plt;
9433 case R_PPC_COPY:
9434 return reloc_class_copy;
9435 default:
9436 return reloc_class_normal;
9437 }
9438 }
9439 \f
9440 /* Finish up the dynamic sections. */
9441
9442 static bfd_boolean
9443 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9444 struct bfd_link_info *info)
9445 {
9446 asection *sdyn;
9447 asection *splt;
9448 struct ppc_elf_link_hash_table *htab;
9449 bfd_vma got;
9450 bfd *dynobj;
9451 bfd_boolean ret = TRUE;
9452
9453 #ifdef DEBUG
9454 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9455 #endif
9456
9457 htab = ppc_elf_hash_table (info);
9458 dynobj = elf_hash_table (info)->dynobj;
9459 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9460 if (htab->is_vxworks)
9461 splt = bfd_get_linker_section (dynobj, ".plt");
9462 else
9463 splt = NULL;
9464
9465 got = 0;
9466 if (htab->elf.hgot != NULL)
9467 got = SYM_VAL (htab->elf.hgot);
9468
9469 if (htab->elf.dynamic_sections_created)
9470 {
9471 Elf32_External_Dyn *dyncon, *dynconend;
9472
9473 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9474
9475 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9476 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9477 for (; dyncon < dynconend; dyncon++)
9478 {
9479 Elf_Internal_Dyn dyn;
9480 asection *s;
9481
9482 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9483
9484 switch (dyn.d_tag)
9485 {
9486 case DT_PLTGOT:
9487 if (htab->is_vxworks)
9488 s = htab->sgotplt;
9489 else
9490 s = htab->plt;
9491 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9492 break;
9493
9494 case DT_PLTRELSZ:
9495 dyn.d_un.d_val = htab->relplt->size;
9496 break;
9497
9498 case DT_JMPREL:
9499 s = htab->relplt;
9500 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9501 break;
9502
9503 case DT_PPC_GOT:
9504 dyn.d_un.d_ptr = got;
9505 break;
9506
9507 case DT_RELASZ:
9508 if (htab->is_vxworks)
9509 {
9510 if (htab->relplt)
9511 dyn.d_un.d_ptr -= htab->relplt->size;
9512 break;
9513 }
9514 continue;
9515
9516 default:
9517 if (htab->is_vxworks
9518 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9519 break;
9520 continue;
9521 }
9522
9523 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9524 }
9525 }
9526
9527 if (htab->got != NULL)
9528 {
9529 if (htab->elf.hgot->root.u.def.section == htab->got
9530 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9531 {
9532 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9533
9534 p += htab->elf.hgot->root.u.def.value;
9535 if (htab->plt_type == PLT_OLD)
9536 {
9537 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9538 so that a function can easily find the address of
9539 _GLOBAL_OFFSET_TABLE_. */
9540 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9541 < htab->elf.hgot->root.u.def.section->size);
9542 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9543 }
9544
9545 if (sdyn != NULL)
9546 {
9547 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9548 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9549 < htab->elf.hgot->root.u.def.section->size);
9550 bfd_put_32 (output_bfd, val, p);
9551 }
9552 }
9553 else
9554 {
9555 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9556 htab->elf.hgot->root.root.string,
9557 (htab->sgotplt != NULL
9558 ? htab->sgotplt->name : htab->got->name));
9559 bfd_set_error (bfd_error_bad_value);
9560 ret = FALSE;
9561 }
9562
9563 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9564 }
9565
9566 /* Fill in the first entry in the VxWorks procedure linkage table. */
9567 if (splt && splt->size > 0)
9568 {
9569 /* Use the right PLT. */
9570 const bfd_vma *plt_entry = (info->shared
9571 ? ppc_elf_vxworks_pic_plt0_entry
9572 : ppc_elf_vxworks_plt0_entry);
9573
9574 if (!info->shared)
9575 {
9576 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9577
9578 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9579 splt->contents + 0);
9580 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9581 splt->contents + 4);
9582 }
9583 else
9584 {
9585 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9586 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9587 }
9588 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9589 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9590 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9591 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9592 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9593 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9594
9595 if (! info->shared)
9596 {
9597 Elf_Internal_Rela rela;
9598 bfd_byte *loc;
9599
9600 loc = htab->srelplt2->contents;
9601
9602 /* Output the @ha relocation for the first instruction. */
9603 rela.r_offset = (htab->plt->output_section->vma
9604 + htab->plt->output_offset
9605 + 2);
9606 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9607 rela.r_addend = 0;
9608 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9609 loc += sizeof (Elf32_External_Rela);
9610
9611 /* Output the @l relocation for the second instruction. */
9612 rela.r_offset = (htab->plt->output_section->vma
9613 + htab->plt->output_offset
9614 + 6);
9615 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9616 rela.r_addend = 0;
9617 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9618 loc += sizeof (Elf32_External_Rela);
9619
9620 /* Fix up the remaining relocations. They may have the wrong
9621 symbol index for _G_O_T_ or _P_L_T_ depending on the order
9622 in which symbols were output. */
9623 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
9624 {
9625 Elf_Internal_Rela rel;
9626
9627 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9628 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9629 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9630 loc += sizeof (Elf32_External_Rela);
9631
9632 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9633 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9634 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9635 loc += sizeof (Elf32_External_Rela);
9636
9637 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9638 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
9639 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9640 loc += sizeof (Elf32_External_Rela);
9641 }
9642 }
9643 }
9644
9645 if (htab->glink != NULL
9646 && htab->glink->contents != NULL
9647 && htab->elf.dynamic_sections_created)
9648 {
9649 unsigned char *p;
9650 unsigned char *endp;
9651 bfd_vma res0;
9652 unsigned int i;
9653
9654 /*
9655 * PIC glink code is the following:
9656 *
9657 * # ith PLT code stub.
9658 * addis 11,30,(plt+(i-1)*4-got)@ha
9659 * lwz 11,(plt+(i-1)*4-got)@l(11)
9660 * mtctr 11
9661 * bctr
9662 *
9663 * # A table of branches, one for each plt entry.
9664 * # The idea is that the plt call stub loads ctr and r11 with these
9665 * # addresses, so (r11 - res_0) gives the plt index * 4.
9666 * res_0: b PLTresolve
9667 * res_1: b PLTresolve
9668 * .
9669 * # Some number of entries towards the end can be nops
9670 * res_n_m3: nop
9671 * res_n_m2: nop
9672 * res_n_m1:
9673 *
9674 * PLTresolve:
9675 * addis 11,11,(1f-res_0)@ha
9676 * mflr 0
9677 * bcl 20,31,1f
9678 * 1: addi 11,11,(1b-res_0)@l
9679 * mflr 12
9680 * mtlr 0
9681 * sub 11,11,12 # r11 = index * 4
9682 * addis 12,12,(got+4-1b)@ha
9683 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
9684 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
9685 * mtctr 0
9686 * add 0,11,11
9687 * add 11,0,11 # r11 = index * 12 = reloc offset.
9688 * bctr
9689 */
9690 static const unsigned int pic_plt_resolve[] =
9691 {
9692 ADDIS_11_11,
9693 MFLR_0,
9694 BCL_20_31,
9695 ADDI_11_11,
9696 MFLR_12,
9697 MTLR_0,
9698 SUB_11_11_12,
9699 ADDIS_12_12,
9700 LWZ_0_12,
9701 LWZ_12_12,
9702 MTCTR_0,
9703 ADD_0_11_11,
9704 ADD_11_0_11,
9705 BCTR,
9706 NOP,
9707 NOP
9708 };
9709
9710 /*
9711 * Non-PIC glink code is a little simpler.
9712 *
9713 * # ith PLT code stub.
9714 * lis 11,(plt+(i-1)*4)@ha
9715 * lwz 11,(plt+(i-1)*4)@l(11)
9716 * mtctr 11
9717 * bctr
9718 *
9719 * The branch table is the same, then comes
9720 *
9721 * PLTresolve:
9722 * lis 12,(got+4)@ha
9723 * addis 11,11,(-res_0)@ha
9724 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
9725 * addi 11,11,(-res_0)@l # r11 = index * 4
9726 * mtctr 0
9727 * add 0,11,11
9728 * lwz 12,(got+8)@l(12) # got[2] contains the map address
9729 * add 11,0,11 # r11 = index * 12 = reloc offset.
9730 * bctr
9731 */
9732 static const unsigned int plt_resolve[] =
9733 {
9734 LIS_12,
9735 ADDIS_11_11,
9736 LWZ_0_12,
9737 ADDI_11_11,
9738 MTCTR_0,
9739 ADD_0_11_11,
9740 LWZ_12_12,
9741 ADD_11_0_11,
9742 BCTR,
9743 NOP,
9744 NOP,
9745 NOP,
9746 NOP,
9747 NOP,
9748 NOP,
9749 NOP
9750 };
9751
9752 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
9753 abort ();
9754 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
9755 abort ();
9756
9757 /* Build the branch table, one for each plt entry (less one),
9758 and perhaps some padding. */
9759 p = htab->glink->contents;
9760 p += htab->glink_pltresolve;
9761 endp = htab->glink->contents;
9762 endp += htab->glink->size - GLINK_PLTRESOLVE;
9763 while (p < endp - 8 * 4)
9764 {
9765 bfd_put_32 (output_bfd, B + endp - p, p);
9766 p += 4;
9767 }
9768 while (p < endp)
9769 {
9770 bfd_put_32 (output_bfd, NOP, p);
9771 p += 4;
9772 }
9773
9774 res0 = (htab->glink_pltresolve
9775 + htab->glink->output_section->vma
9776 + htab->glink->output_offset);
9777
9778 /* Last comes the PLTresolve stub. */
9779 if (info->shared)
9780 {
9781 bfd_vma bcl;
9782
9783 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
9784 {
9785 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
9786 p += 4;
9787 }
9788 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
9789
9790 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
9791 + htab->glink->output_section->vma
9792 + htab->glink->output_offset);
9793
9794 bfd_put_32 (output_bfd,
9795 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
9796 bfd_put_32 (output_bfd,
9797 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
9798 bfd_put_32 (output_bfd,
9799 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
9800 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
9801 {
9802 bfd_put_32 (output_bfd,
9803 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
9804 bfd_put_32 (output_bfd,
9805 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
9806 }
9807 else
9808 {
9809 bfd_put_32 (output_bfd,
9810 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
9811 bfd_put_32 (output_bfd,
9812 LWZ_12_12 + 4, p + 9*4);
9813 }
9814 }
9815 else
9816 {
9817 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
9818 {
9819 bfd_put_32 (output_bfd, plt_resolve[i], p);
9820 p += 4;
9821 }
9822 p -= 4 * ARRAY_SIZE (plt_resolve);
9823
9824 bfd_put_32 (output_bfd,
9825 LIS_12 + PPC_HA (got + 4), p + 0*4);
9826 bfd_put_32 (output_bfd,
9827 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
9828 bfd_put_32 (output_bfd,
9829 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
9830 if (PPC_HA (got + 4) == PPC_HA (got + 8))
9831 {
9832 bfd_put_32 (output_bfd,
9833 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
9834 bfd_put_32 (output_bfd,
9835 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
9836 }
9837 else
9838 {
9839 bfd_put_32 (output_bfd,
9840 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
9841 bfd_put_32 (output_bfd,
9842 LWZ_12_12 + 4, p + 6*4);
9843 }
9844 }
9845 }
9846
9847 if (htab->glink_eh_frame != NULL
9848 && htab->glink_eh_frame->contents != NULL)
9849 {
9850 unsigned char *p = htab->glink_eh_frame->contents;
9851 bfd_vma val;
9852
9853 p += sizeof (glink_eh_frame_cie);
9854 /* FDE length. */
9855 p += 4;
9856 /* CIE pointer. */
9857 p += 4;
9858 /* Offset to .glink. */
9859 val = (htab->glink->output_section->vma
9860 + htab->glink->output_offset);
9861 val -= (htab->glink_eh_frame->output_section->vma
9862 + htab->glink_eh_frame->output_offset);
9863 val -= p - htab->glink_eh_frame->contents;
9864 bfd_put_32 (htab->elf.dynobj, val, p);
9865
9866 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
9867 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
9868 htab->glink_eh_frame,
9869 htab->glink_eh_frame->contents))
9870 return FALSE;
9871 }
9872
9873 return ret;
9874 }
9875 \f
9876 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
9877 #define TARGET_LITTLE_NAME "elf32-powerpcle"
9878 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
9879 #define TARGET_BIG_NAME "elf32-powerpc"
9880 #define ELF_ARCH bfd_arch_powerpc
9881 #define ELF_TARGET_ID PPC32_ELF_DATA
9882 #define ELF_MACHINE_CODE EM_PPC
9883 #ifdef __QNXTARGET__
9884 #define ELF_MAXPAGESIZE 0x1000
9885 #else
9886 #define ELF_MAXPAGESIZE 0x10000
9887 #endif
9888 #define ELF_MINPAGESIZE 0x1000
9889 #define ELF_COMMONPAGESIZE 0x1000
9890 #define elf_info_to_howto ppc_elf_info_to_howto
9891
9892 #ifdef EM_CYGNUS_POWERPC
9893 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
9894 #endif
9895
9896 #ifdef EM_PPC_OLD
9897 #define ELF_MACHINE_ALT2 EM_PPC_OLD
9898 #endif
9899
9900 #define elf_backend_plt_not_loaded 1
9901 #define elf_backend_can_gc_sections 1
9902 #define elf_backend_can_refcount 1
9903 #define elf_backend_rela_normal 1
9904
9905 #define bfd_elf32_mkobject ppc_elf_mkobject
9906 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
9907 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
9908 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
9909 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
9910 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
9911 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
9912 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
9913
9914 #define elf_backend_object_p ppc_elf_object_p
9915 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
9916 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
9917 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
9918 #define elf_backend_relocate_section ppc_elf_relocate_section
9919 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
9920 #define elf_backend_check_relocs ppc_elf_check_relocs
9921 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
9922 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
9923 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
9924 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
9925 #define elf_backend_hash_symbol ppc_elf_hash_symbol
9926 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
9927 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
9928 #define elf_backend_fake_sections ppc_elf_fake_sections
9929 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
9930 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
9931 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
9932 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
9933 #define elf_backend_write_core_note ppc_elf_write_core_note
9934 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
9935 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
9936 #define elf_backend_final_write_processing ppc_elf_final_write_processing
9937 #define elf_backend_write_section ppc_elf_write_section
9938 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
9939 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
9940 #define elf_backend_action_discarded ppc_elf_action_discarded
9941 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
9942 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
9943 #define elf_backend_section_processing ppc_elf_section_processing
9944
9945 #include "elf32-target.h"
9946
9947 /* FreeBSD Target */
9948
9949 #undef TARGET_LITTLE_SYM
9950 #undef TARGET_LITTLE_NAME
9951
9952 #undef TARGET_BIG_SYM
9953 #define TARGET_BIG_SYM bfd_elf32_powerpc_freebsd_vec
9954 #undef TARGET_BIG_NAME
9955 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
9956
9957 #undef ELF_OSABI
9958 #define ELF_OSABI ELFOSABI_FREEBSD
9959
9960 #undef elf32_bed
9961 #define elf32_bed elf32_powerpc_fbsd_bed
9962
9963 #include "elf32-target.h"
9964
9965 /* VxWorks Target */
9966
9967 #undef TARGET_LITTLE_SYM
9968 #undef TARGET_LITTLE_NAME
9969
9970 #undef TARGET_BIG_SYM
9971 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
9972 #undef TARGET_BIG_NAME
9973 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
9974
9975 #undef ELF_OSABI
9976
9977 /* VxWorks uses the elf default section flags for .plt. */
9978 static const struct bfd_elf_special_section *
9979 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
9980 {
9981 if (sec->name == NULL)
9982 return NULL;
9983
9984 if (strcmp (sec->name, ".plt") == 0)
9985 return _bfd_elf_get_sec_type_attr (abfd, sec);
9986
9987 return ppc_elf_get_sec_type_attr (abfd, sec);
9988 }
9989
9990 /* Like ppc_elf_link_hash_table_create, but overrides
9991 appropriately for VxWorks. */
9992 static struct bfd_link_hash_table *
9993 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
9994 {
9995 struct bfd_link_hash_table *ret;
9996
9997 ret = ppc_elf_link_hash_table_create (abfd);
9998 if (ret)
9999 {
10000 struct ppc_elf_link_hash_table *htab
10001 = (struct ppc_elf_link_hash_table *)ret;
10002 htab->is_vxworks = 1;
10003 htab->plt_type = PLT_VXWORKS;
10004 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10005 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10006 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10007 }
10008 return ret;
10009 }
10010
10011 /* Tweak magic VxWorks symbols as they are loaded. */
10012 static bfd_boolean
10013 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10014 struct bfd_link_info *info,
10015 Elf_Internal_Sym *sym,
10016 const char **namep ATTRIBUTE_UNUSED,
10017 flagword *flagsp ATTRIBUTE_UNUSED,
10018 asection **secp,
10019 bfd_vma *valp)
10020 {
10021 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10022 valp))
10023 return FALSE;
10024
10025 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10026 }
10027
10028 static void
10029 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10030 {
10031 ppc_elf_final_write_processing(abfd, linker);
10032 elf_vxworks_final_write_processing(abfd, linker);
10033 }
10034
10035 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10036 define it. */
10037 #undef elf_backend_want_plt_sym
10038 #define elf_backend_want_plt_sym 1
10039 #undef elf_backend_want_got_plt
10040 #define elf_backend_want_got_plt 1
10041 #undef elf_backend_got_symbol_offset
10042 #define elf_backend_got_symbol_offset 0
10043 #undef elf_backend_plt_not_loaded
10044 #define elf_backend_plt_not_loaded 0
10045 #undef elf_backend_plt_readonly
10046 #define elf_backend_plt_readonly 1
10047 #undef elf_backend_got_header_size
10048 #define elf_backend_got_header_size 12
10049
10050 #undef bfd_elf32_get_synthetic_symtab
10051
10052 #undef bfd_elf32_bfd_link_hash_table_create
10053 #define bfd_elf32_bfd_link_hash_table_create \
10054 ppc_elf_vxworks_link_hash_table_create
10055 #undef elf_backend_add_symbol_hook
10056 #define elf_backend_add_symbol_hook \
10057 ppc_elf_vxworks_add_symbol_hook
10058 #undef elf_backend_link_output_symbol_hook
10059 #define elf_backend_link_output_symbol_hook \
10060 elf_vxworks_link_output_symbol_hook
10061 #undef elf_backend_final_write_processing
10062 #define elf_backend_final_write_processing \
10063 ppc_elf_vxworks_final_write_processing
10064 #undef elf_backend_get_sec_type_attr
10065 #define elf_backend_get_sec_type_attr \
10066 ppc_elf_vxworks_get_sec_type_attr
10067 #undef elf_backend_emit_relocs
10068 #define elf_backend_emit_relocs \
10069 elf_vxworks_emit_relocs
10070
10071 #undef elf32_bed
10072 #define elf32_bed ppc_elf_vxworks_bed
10073 #undef elf_backend_post_process_headers
10074
10075 #include "elf32-target.h"