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ppc476 icache bug workaround
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Written by Ian Lance Taylor, Cygnus Support.
6
7 This file is part of BFD, the Binary File Descriptor library.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the
21 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
22 Boston, MA 02110-1301, USA. */
23
24
25 /* This file is based on a preliminary PowerPC ELF ABI. The
26 information may not match the final PowerPC ELF ABI. It includes
27 suggestions from the in-progress Embedded PowerPC ABI, and that
28 information may also not match. */
29
30 #include "sysdep.h"
31 #include <stdarg.h>
32 #include "bfd.h"
33 #include "bfdlink.h"
34 #include "libbfd.h"
35 #include "elf-bfd.h"
36 #include "elf/ppc.h"
37 #include "elf32-ppc.h"
38 #include "elf-vxworks.h"
39 #include "dwarf2.h"
40 #include "elf-linux-psinfo.h"
41
42 typedef enum split16_format_type
43 {
44 split16a_type = 0,
45 split16d_type
46 }
47 split16_format_type;
48
49 /* RELA relocations are used here. */
50
51 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
52 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
53 static bfd_reloc_status_type ppc_elf_unhandled_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static void ppc_elf_vle_split16
56 (bfd *, bfd_byte *, bfd_vma, bfd_vma, split16_format_type);
57
58 /* Branch prediction bit for branch taken relocs. */
59 #define BRANCH_PREDICT_BIT 0x200000
60 /* Mask to set RA in memory instructions. */
61 #define RA_REGISTER_MASK 0x001f0000
62 /* Value to shift register by to insert RA. */
63 #define RA_REGISTER_SHIFT 16
64
65 /* The name of the dynamic interpreter. This is put in the .interp
66 section. */
67 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
68
69 /* For old-style PLT. */
70 /* The number of single-slot PLT entries (the rest use two slots). */
71 #define PLT_NUM_SINGLE_ENTRIES 8192
72
73 /* For new-style .glink and .plt. */
74 #define GLINK_PLTRESOLVE 16*4
75 #define GLINK_ENTRY_SIZE 4*4
76 #define TLS_GET_ADDR_GLINK_SIZE 12*4
77
78 /* VxWorks uses its own plt layout, filled in by the static linker. */
79
80 /* The standard VxWorks PLT entry. */
81 #define VXWORKS_PLT_ENTRY_SIZE 32
82 static const bfd_vma ppc_elf_vxworks_plt_entry
83 [VXWORKS_PLT_ENTRY_SIZE / 4] =
84 {
85 0x3d800000, /* lis r12,0 */
86 0x818c0000, /* lwz r12,0(r12) */
87 0x7d8903a6, /* mtctr r12 */
88 0x4e800420, /* bctr */
89 0x39600000, /* li r11,0 */
90 0x48000000, /* b 14 <.PLT0resolve+0x4> */
91 0x60000000, /* nop */
92 0x60000000, /* nop */
93 };
94 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
95 [VXWORKS_PLT_ENTRY_SIZE / 4] =
96 {
97 0x3d9e0000, /* addis r12,r30,0 */
98 0x818c0000, /* lwz r12,0(r12) */
99 0x7d8903a6, /* mtctr r12 */
100 0x4e800420, /* bctr */
101 0x39600000, /* li r11,0 */
102 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106
107 /* The initial VxWorks PLT entry. */
108 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
109 static const bfd_vma ppc_elf_vxworks_plt0_entry
110 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
111 {
112 0x3d800000, /* lis r12,0 */
113 0x398c0000, /* addi r12,r12,0 */
114 0x800c0008, /* lwz r0,8(r12) */
115 0x7c0903a6, /* mtctr r0 */
116 0x818c0004, /* lwz r12,4(r12) */
117 0x4e800420, /* bctr */
118 0x60000000, /* nop */
119 0x60000000, /* nop */
120 };
121 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
122 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
123 {
124 0x819e0008, /* lwz r12,8(r30) */
125 0x7d8903a6, /* mtctr r12 */
126 0x819e0004, /* lwz r12,4(r30) */
127 0x4e800420, /* bctr */
128 0x60000000, /* nop */
129 0x60000000, /* nop */
130 0x60000000, /* nop */
131 0x60000000, /* nop */
132 };
133
134 /* For executables, we have some additional relocations in
135 .rela.plt.unloaded, for the kernel loader. */
136
137 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
138 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
139 /* The number of relocations in the PLTResolve slot. */
140 #define VXWORKS_PLTRESOLVE_RELOCS 2
141 /* The number of relocations in the PLTResolve slot when when creating
142 a shared library. */
143 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
144
145 /* Some instructions. */
146 #define ADDIS_11_11 0x3d6b0000
147 #define ADDIS_11_30 0x3d7e0000
148 #define ADDIS_12_12 0x3d8c0000
149 #define ADDI_11_11 0x396b0000
150 #define ADD_0_11_11 0x7c0b5a14
151 #define ADD_3_12_2 0x7c6c1214
152 #define ADD_11_0_11 0x7d605a14
153 #define B 0x48000000
154 #define BCL_20_31 0x429f0005
155 #define BCTR 0x4e800420
156 #define BEQLR 0x4d820020
157 #define CMPWI_11_0 0x2c0b0000
158 #define LIS_11 0x3d600000
159 #define LIS_12 0x3d800000
160 #define LWZU_0_12 0x840c0000
161 #define LWZ_0_12 0x800c0000
162 #define LWZ_11_3 0x81630000
163 #define LWZ_11_11 0x816b0000
164 #define LWZ_11_30 0x817e0000
165 #define LWZ_12_3 0x81830000
166 #define LWZ_12_12 0x818c0000
167 #define MR_0_3 0x7c601b78
168 #define MR_3_0 0x7c030378
169 #define MFLR_0 0x7c0802a6
170 #define MFLR_12 0x7d8802a6
171 #define MTCTR_0 0x7c0903a6
172 #define MTCTR_11 0x7d6903a6
173 #define MTLR_0 0x7c0803a6
174 #define NOP 0x60000000
175 #define SUB_11_11_12 0x7d6c5850
176
177 /* Offset of tp and dtp pointers from start of TLS block. */
178 #define TP_OFFSET 0x7000
179 #define DTP_OFFSET 0x8000
180
181 /* The value of a defined global symbol. */
182 #define SYM_VAL(SYM) \
183 ((SYM)->root.u.def.section->output_section->vma \
184 + (SYM)->root.u.def.section->output_offset \
185 + (SYM)->root.u.def.value)
186 \f
187 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
188
189 static reloc_howto_type ppc_elf_howto_raw[] = {
190 /* This reloc does nothing. */
191 HOWTO (R_PPC_NONE, /* type */
192 0, /* rightshift */
193 2, /* size (0 = byte, 1 = short, 2 = long) */
194 32, /* bitsize */
195 FALSE, /* pc_relative */
196 0, /* bitpos */
197 complain_overflow_bitfield, /* complain_on_overflow */
198 bfd_elf_generic_reloc, /* special_function */
199 "R_PPC_NONE", /* name */
200 FALSE, /* partial_inplace */
201 0, /* src_mask */
202 0, /* dst_mask */
203 FALSE), /* pcrel_offset */
204
205 /* A standard 32 bit relocation. */
206 HOWTO (R_PPC_ADDR32, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 32, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_bitfield, /* complain_on_overflow */
213 bfd_elf_generic_reloc, /* special_function */
214 "R_PPC_ADDR32", /* name */
215 FALSE, /* partial_inplace */
216 0, /* src_mask */
217 0xffffffff, /* dst_mask */
218 FALSE), /* pcrel_offset */
219
220 /* An absolute 26 bit branch; the lower two bits must be zero.
221 FIXME: we don't check that, we just clear them. */
222 HOWTO (R_PPC_ADDR24, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 26, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_bitfield, /* complain_on_overflow */
229 bfd_elf_generic_reloc, /* special_function */
230 "R_PPC_ADDR24", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0x3fffffc, /* dst_mask */
234 FALSE), /* pcrel_offset */
235
236 /* A standard 16 bit relocation. */
237 HOWTO (R_PPC_ADDR16, /* type */
238 0, /* rightshift */
239 1, /* size (0 = byte, 1 = short, 2 = long) */
240 16, /* bitsize */
241 FALSE, /* pc_relative */
242 0, /* bitpos */
243 complain_overflow_bitfield, /* complain_on_overflow */
244 bfd_elf_generic_reloc, /* special_function */
245 "R_PPC_ADDR16", /* name */
246 FALSE, /* partial_inplace */
247 0, /* src_mask */
248 0xffff, /* dst_mask */
249 FALSE), /* pcrel_offset */
250
251 /* A 16 bit relocation without overflow. */
252 HOWTO (R_PPC_ADDR16_LO, /* type */
253 0, /* rightshift */
254 1, /* size (0 = byte, 1 = short, 2 = long) */
255 16, /* bitsize */
256 FALSE, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_dont,/* complain_on_overflow */
259 bfd_elf_generic_reloc, /* special_function */
260 "R_PPC_ADDR16_LO", /* name */
261 FALSE, /* partial_inplace */
262 0, /* src_mask */
263 0xffff, /* dst_mask */
264 FALSE), /* pcrel_offset */
265
266 /* The high order 16 bits of an address. */
267 HOWTO (R_PPC_ADDR16_HI, /* type */
268 16, /* rightshift */
269 1, /* size (0 = byte, 1 = short, 2 = long) */
270 16, /* bitsize */
271 FALSE, /* pc_relative */
272 0, /* bitpos */
273 complain_overflow_dont, /* complain_on_overflow */
274 bfd_elf_generic_reloc, /* special_function */
275 "R_PPC_ADDR16_HI", /* name */
276 FALSE, /* partial_inplace */
277 0, /* src_mask */
278 0xffff, /* dst_mask */
279 FALSE), /* pcrel_offset */
280
281 /* The high order 16 bits of an address, plus 1 if the contents of
282 the low 16 bits, treated as a signed number, is negative. */
283 HOWTO (R_PPC_ADDR16_HA, /* type */
284 16, /* rightshift */
285 1, /* size (0 = byte, 1 = short, 2 = long) */
286 16, /* bitsize */
287 FALSE, /* pc_relative */
288 0, /* bitpos */
289 complain_overflow_dont, /* complain_on_overflow */
290 ppc_elf_addr16_ha_reloc, /* special_function */
291 "R_PPC_ADDR16_HA", /* name */
292 FALSE, /* partial_inplace */
293 0, /* src_mask */
294 0xffff, /* dst_mask */
295 FALSE), /* pcrel_offset */
296
297 /* An absolute 16 bit branch; the lower two bits must be zero.
298 FIXME: we don't check that, we just clear them. */
299 HOWTO (R_PPC_ADDR14, /* type */
300 0, /* rightshift */
301 2, /* size (0 = byte, 1 = short, 2 = long) */
302 16, /* bitsize */
303 FALSE, /* pc_relative */
304 0, /* bitpos */
305 complain_overflow_bitfield, /* complain_on_overflow */
306 bfd_elf_generic_reloc, /* special_function */
307 "R_PPC_ADDR14", /* name */
308 FALSE, /* partial_inplace */
309 0, /* src_mask */
310 0xfffc, /* dst_mask */
311 FALSE), /* pcrel_offset */
312
313 /* An absolute 16 bit branch, for which bit 10 should be set to
314 indicate that the branch is expected to be taken. The lower two
315 bits must be zero. */
316 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
317 0, /* rightshift */
318 2, /* size (0 = byte, 1 = short, 2 = long) */
319 16, /* bitsize */
320 FALSE, /* pc_relative */
321 0, /* bitpos */
322 complain_overflow_bitfield, /* complain_on_overflow */
323 bfd_elf_generic_reloc, /* special_function */
324 "R_PPC_ADDR14_BRTAKEN",/* name */
325 FALSE, /* partial_inplace */
326 0, /* src_mask */
327 0xfffc, /* dst_mask */
328 FALSE), /* pcrel_offset */
329
330 /* An absolute 16 bit branch, for which bit 10 should be set to
331 indicate that the branch is not expected to be taken. The lower
332 two bits must be zero. */
333 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
334 0, /* rightshift */
335 2, /* size (0 = byte, 1 = short, 2 = long) */
336 16, /* bitsize */
337 FALSE, /* pc_relative */
338 0, /* bitpos */
339 complain_overflow_bitfield, /* complain_on_overflow */
340 bfd_elf_generic_reloc, /* special_function */
341 "R_PPC_ADDR14_BRNTAKEN",/* name */
342 FALSE, /* partial_inplace */
343 0, /* src_mask */
344 0xfffc, /* dst_mask */
345 FALSE), /* pcrel_offset */
346
347 /* A relative 26 bit branch; the lower two bits must be zero. */
348 HOWTO (R_PPC_REL24, /* type */
349 0, /* rightshift */
350 2, /* size (0 = byte, 1 = short, 2 = long) */
351 26, /* bitsize */
352 TRUE, /* pc_relative */
353 0, /* bitpos */
354 complain_overflow_signed, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_PPC_REL24", /* name */
357 FALSE, /* partial_inplace */
358 0, /* src_mask */
359 0x3fffffc, /* dst_mask */
360 TRUE), /* pcrel_offset */
361
362 /* A relative 16 bit branch; the lower two bits must be zero. */
363 HOWTO (R_PPC_REL14, /* type */
364 0, /* rightshift */
365 2, /* size (0 = byte, 1 = short, 2 = long) */
366 16, /* bitsize */
367 TRUE, /* pc_relative */
368 0, /* bitpos */
369 complain_overflow_signed, /* complain_on_overflow */
370 bfd_elf_generic_reloc, /* special_function */
371 "R_PPC_REL14", /* name */
372 FALSE, /* partial_inplace */
373 0, /* src_mask */
374 0xfffc, /* dst_mask */
375 TRUE), /* pcrel_offset */
376
377 /* A relative 16 bit branch. Bit 10 should be set to indicate that
378 the branch is expected to be taken. The lower two bits must be
379 zero. */
380 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
381 0, /* rightshift */
382 2, /* size (0 = byte, 1 = short, 2 = long) */
383 16, /* bitsize */
384 TRUE, /* pc_relative */
385 0, /* bitpos */
386 complain_overflow_signed, /* complain_on_overflow */
387 bfd_elf_generic_reloc, /* special_function */
388 "R_PPC_REL14_BRTAKEN", /* name */
389 FALSE, /* partial_inplace */
390 0, /* src_mask */
391 0xfffc, /* dst_mask */
392 TRUE), /* pcrel_offset */
393
394 /* A relative 16 bit branch. Bit 10 should be set to indicate that
395 the branch is not expected to be taken. The lower two bits must
396 be zero. */
397 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
398 0, /* rightshift */
399 2, /* size (0 = byte, 1 = short, 2 = long) */
400 16, /* bitsize */
401 TRUE, /* pc_relative */
402 0, /* bitpos */
403 complain_overflow_signed, /* complain_on_overflow */
404 bfd_elf_generic_reloc, /* special_function */
405 "R_PPC_REL14_BRNTAKEN",/* name */
406 FALSE, /* partial_inplace */
407 0, /* src_mask */
408 0xfffc, /* dst_mask */
409 TRUE), /* pcrel_offset */
410
411 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
412 symbol. */
413 HOWTO (R_PPC_GOT16, /* type */
414 0, /* rightshift */
415 1, /* size (0 = byte, 1 = short, 2 = long) */
416 16, /* bitsize */
417 FALSE, /* pc_relative */
418 0, /* bitpos */
419 complain_overflow_signed, /* complain_on_overflow */
420 bfd_elf_generic_reloc, /* special_function */
421 "R_PPC_GOT16", /* name */
422 FALSE, /* partial_inplace */
423 0, /* src_mask */
424 0xffff, /* dst_mask */
425 FALSE), /* pcrel_offset */
426
427 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
428 the symbol. */
429 HOWTO (R_PPC_GOT16_LO, /* type */
430 0, /* rightshift */
431 1, /* size (0 = byte, 1 = short, 2 = long) */
432 16, /* bitsize */
433 FALSE, /* pc_relative */
434 0, /* bitpos */
435 complain_overflow_dont, /* complain_on_overflow */
436 bfd_elf_generic_reloc, /* special_function */
437 "R_PPC_GOT16_LO", /* name */
438 FALSE, /* partial_inplace */
439 0, /* src_mask */
440 0xffff, /* dst_mask */
441 FALSE), /* pcrel_offset */
442
443 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
444 the symbol. */
445 HOWTO (R_PPC_GOT16_HI, /* type */
446 16, /* rightshift */
447 1, /* size (0 = byte, 1 = short, 2 = long) */
448 16, /* bitsize */
449 FALSE, /* pc_relative */
450 0, /* bitpos */
451 complain_overflow_bitfield, /* complain_on_overflow */
452 bfd_elf_generic_reloc, /* special_function */
453 "R_PPC_GOT16_HI", /* name */
454 FALSE, /* partial_inplace */
455 0, /* src_mask */
456 0xffff, /* dst_mask */
457 FALSE), /* pcrel_offset */
458
459 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
460 the symbol. */
461 HOWTO (R_PPC_GOT16_HA, /* type */
462 16, /* rightshift */
463 1, /* size (0 = byte, 1 = short, 2 = long) */
464 16, /* bitsize */
465 FALSE, /* pc_relative */
466 0, /* bitpos */
467 complain_overflow_bitfield, /* complain_on_overflow */
468 ppc_elf_addr16_ha_reloc, /* special_function */
469 "R_PPC_GOT16_HA", /* name */
470 FALSE, /* partial_inplace */
471 0, /* src_mask */
472 0xffff, /* dst_mask */
473 FALSE), /* pcrel_offset */
474
475 /* Like R_PPC_REL24, but referring to the procedure linkage table
476 entry for the symbol. */
477 HOWTO (R_PPC_PLTREL24, /* type */
478 0, /* rightshift */
479 2, /* size (0 = byte, 1 = short, 2 = long) */
480 26, /* bitsize */
481 TRUE, /* pc_relative */
482 0, /* bitpos */
483 complain_overflow_signed, /* complain_on_overflow */
484 bfd_elf_generic_reloc, /* special_function */
485 "R_PPC_PLTREL24", /* name */
486 FALSE, /* partial_inplace */
487 0, /* src_mask */
488 0x3fffffc, /* dst_mask */
489 TRUE), /* pcrel_offset */
490
491 /* This is used only by the dynamic linker. The symbol should exist
492 both in the object being run and in some shared library. The
493 dynamic linker copies the data addressed by the symbol from the
494 shared library into the object, because the object being
495 run has to have the data at some particular address. */
496 HOWTO (R_PPC_COPY, /* type */
497 0, /* rightshift */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
499 32, /* bitsize */
500 FALSE, /* pc_relative */
501 0, /* bitpos */
502 complain_overflow_bitfield, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 "R_PPC_COPY", /* name */
505 FALSE, /* partial_inplace */
506 0, /* src_mask */
507 0, /* dst_mask */
508 FALSE), /* pcrel_offset */
509
510 /* Like R_PPC_ADDR32, but used when setting global offset table
511 entries. */
512 HOWTO (R_PPC_GLOB_DAT, /* type */
513 0, /* rightshift */
514 2, /* size (0 = byte, 1 = short, 2 = long) */
515 32, /* bitsize */
516 FALSE, /* pc_relative */
517 0, /* bitpos */
518 complain_overflow_bitfield, /* complain_on_overflow */
519 bfd_elf_generic_reloc, /* special_function */
520 "R_PPC_GLOB_DAT", /* name */
521 FALSE, /* partial_inplace */
522 0, /* src_mask */
523 0xffffffff, /* dst_mask */
524 FALSE), /* pcrel_offset */
525
526 /* Marks a procedure linkage table entry for a symbol. */
527 HOWTO (R_PPC_JMP_SLOT, /* type */
528 0, /* rightshift */
529 2, /* size (0 = byte, 1 = short, 2 = long) */
530 32, /* bitsize */
531 FALSE, /* pc_relative */
532 0, /* bitpos */
533 complain_overflow_bitfield, /* complain_on_overflow */
534 bfd_elf_generic_reloc, /* special_function */
535 "R_PPC_JMP_SLOT", /* name */
536 FALSE, /* partial_inplace */
537 0, /* src_mask */
538 0, /* dst_mask */
539 FALSE), /* pcrel_offset */
540
541 /* Used only by the dynamic linker. When the object is run, this
542 longword is set to the load address of the object, plus the
543 addend. */
544 HOWTO (R_PPC_RELATIVE, /* type */
545 0, /* rightshift */
546 2, /* size (0 = byte, 1 = short, 2 = long) */
547 32, /* bitsize */
548 FALSE, /* pc_relative */
549 0, /* bitpos */
550 complain_overflow_bitfield, /* complain_on_overflow */
551 bfd_elf_generic_reloc, /* special_function */
552 "R_PPC_RELATIVE", /* name */
553 FALSE, /* partial_inplace */
554 0, /* src_mask */
555 0xffffffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
557
558 /* Like R_PPC_REL24, but uses the value of the symbol within the
559 object rather than the final value. Normally used for
560 _GLOBAL_OFFSET_TABLE_. */
561 HOWTO (R_PPC_LOCAL24PC, /* type */
562 0, /* rightshift */
563 2, /* size (0 = byte, 1 = short, 2 = long) */
564 26, /* bitsize */
565 TRUE, /* pc_relative */
566 0, /* bitpos */
567 complain_overflow_signed, /* complain_on_overflow */
568 bfd_elf_generic_reloc, /* special_function */
569 "R_PPC_LOCAL24PC", /* name */
570 FALSE, /* partial_inplace */
571 0, /* src_mask */
572 0x3fffffc, /* dst_mask */
573 TRUE), /* pcrel_offset */
574
575 /* Like R_PPC_ADDR32, but may be unaligned. */
576 HOWTO (R_PPC_UADDR32, /* type */
577 0, /* rightshift */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
579 32, /* bitsize */
580 FALSE, /* pc_relative */
581 0, /* bitpos */
582 complain_overflow_bitfield, /* complain_on_overflow */
583 bfd_elf_generic_reloc, /* special_function */
584 "R_PPC_UADDR32", /* name */
585 FALSE, /* partial_inplace */
586 0, /* src_mask */
587 0xffffffff, /* dst_mask */
588 FALSE), /* pcrel_offset */
589
590 /* Like R_PPC_ADDR16, but may be unaligned. */
591 HOWTO (R_PPC_UADDR16, /* type */
592 0, /* rightshift */
593 1, /* size (0 = byte, 1 = short, 2 = long) */
594 16, /* bitsize */
595 FALSE, /* pc_relative */
596 0, /* bitpos */
597 complain_overflow_bitfield, /* complain_on_overflow */
598 bfd_elf_generic_reloc, /* special_function */
599 "R_PPC_UADDR16", /* name */
600 FALSE, /* partial_inplace */
601 0, /* src_mask */
602 0xffff, /* dst_mask */
603 FALSE), /* pcrel_offset */
604
605 /* 32-bit PC relative */
606 HOWTO (R_PPC_REL32, /* type */
607 0, /* rightshift */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
609 32, /* bitsize */
610 TRUE, /* pc_relative */
611 0, /* bitpos */
612 complain_overflow_bitfield, /* complain_on_overflow */
613 bfd_elf_generic_reloc, /* special_function */
614 "R_PPC_REL32", /* name */
615 FALSE, /* partial_inplace */
616 0, /* src_mask */
617 0xffffffff, /* dst_mask */
618 TRUE), /* pcrel_offset */
619
620 /* 32-bit relocation to the symbol's procedure linkage table.
621 FIXME: not supported. */
622 HOWTO (R_PPC_PLT32, /* type */
623 0, /* rightshift */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
625 32, /* bitsize */
626 FALSE, /* pc_relative */
627 0, /* bitpos */
628 complain_overflow_bitfield, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 "R_PPC_PLT32", /* name */
631 FALSE, /* partial_inplace */
632 0, /* src_mask */
633 0, /* dst_mask */
634 FALSE), /* pcrel_offset */
635
636 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
637 FIXME: not supported. */
638 HOWTO (R_PPC_PLTREL32, /* type */
639 0, /* rightshift */
640 2, /* size (0 = byte, 1 = short, 2 = long) */
641 32, /* bitsize */
642 TRUE, /* pc_relative */
643 0, /* bitpos */
644 complain_overflow_bitfield, /* complain_on_overflow */
645 bfd_elf_generic_reloc, /* special_function */
646 "R_PPC_PLTREL32", /* name */
647 FALSE, /* partial_inplace */
648 0, /* src_mask */
649 0, /* dst_mask */
650 TRUE), /* pcrel_offset */
651
652 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
653 the symbol. */
654 HOWTO (R_PPC_PLT16_LO, /* type */
655 0, /* rightshift */
656 1, /* size (0 = byte, 1 = short, 2 = long) */
657 16, /* bitsize */
658 FALSE, /* pc_relative */
659 0, /* bitpos */
660 complain_overflow_dont, /* complain_on_overflow */
661 bfd_elf_generic_reloc, /* special_function */
662 "R_PPC_PLT16_LO", /* name */
663 FALSE, /* partial_inplace */
664 0, /* src_mask */
665 0xffff, /* dst_mask */
666 FALSE), /* pcrel_offset */
667
668 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
669 the symbol. */
670 HOWTO (R_PPC_PLT16_HI, /* type */
671 16, /* rightshift */
672 1, /* size (0 = byte, 1 = short, 2 = long) */
673 16, /* bitsize */
674 FALSE, /* pc_relative */
675 0, /* bitpos */
676 complain_overflow_bitfield, /* complain_on_overflow */
677 bfd_elf_generic_reloc, /* special_function */
678 "R_PPC_PLT16_HI", /* name */
679 FALSE, /* partial_inplace */
680 0, /* src_mask */
681 0xffff, /* dst_mask */
682 FALSE), /* pcrel_offset */
683
684 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
685 the symbol. */
686 HOWTO (R_PPC_PLT16_HA, /* type */
687 16, /* rightshift */
688 1, /* size (0 = byte, 1 = short, 2 = long) */
689 16, /* bitsize */
690 FALSE, /* pc_relative */
691 0, /* bitpos */
692 complain_overflow_bitfield, /* complain_on_overflow */
693 ppc_elf_addr16_ha_reloc, /* special_function */
694 "R_PPC_PLT16_HA", /* name */
695 FALSE, /* partial_inplace */
696 0, /* src_mask */
697 0xffff, /* dst_mask */
698 FALSE), /* pcrel_offset */
699
700 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
701 small data items. */
702 HOWTO (R_PPC_SDAREL16, /* type */
703 0, /* rightshift */
704 1, /* size (0 = byte, 1 = short, 2 = long) */
705 16, /* bitsize */
706 FALSE, /* pc_relative */
707 0, /* bitpos */
708 complain_overflow_signed, /* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 "R_PPC_SDAREL16", /* name */
711 FALSE, /* partial_inplace */
712 0, /* src_mask */
713 0xffff, /* dst_mask */
714 FALSE), /* pcrel_offset */
715
716 /* 16-bit section relative relocation. */
717 HOWTO (R_PPC_SECTOFF, /* type */
718 0, /* rightshift */
719 1, /* size (0 = byte, 1 = short, 2 = long) */
720 16, /* bitsize */
721 FALSE, /* pc_relative */
722 0, /* bitpos */
723 complain_overflow_bitfield, /* complain_on_overflow */
724 bfd_elf_generic_reloc, /* special_function */
725 "R_PPC_SECTOFF", /* name */
726 FALSE, /* partial_inplace */
727 0, /* src_mask */
728 0xffff, /* dst_mask */
729 FALSE), /* pcrel_offset */
730
731 /* 16-bit lower half section relative relocation. */
732 HOWTO (R_PPC_SECTOFF_LO, /* type */
733 0, /* rightshift */
734 1, /* size (0 = byte, 1 = short, 2 = long) */
735 16, /* bitsize */
736 FALSE, /* pc_relative */
737 0, /* bitpos */
738 complain_overflow_dont, /* complain_on_overflow */
739 bfd_elf_generic_reloc, /* special_function */
740 "R_PPC_SECTOFF_LO", /* name */
741 FALSE, /* partial_inplace */
742 0, /* src_mask */
743 0xffff, /* dst_mask */
744 FALSE), /* pcrel_offset */
745
746 /* 16-bit upper half section relative relocation. */
747 HOWTO (R_PPC_SECTOFF_HI, /* type */
748 16, /* rightshift */
749 1, /* size (0 = byte, 1 = short, 2 = long) */
750 16, /* bitsize */
751 FALSE, /* pc_relative */
752 0, /* bitpos */
753 complain_overflow_bitfield, /* complain_on_overflow */
754 bfd_elf_generic_reloc, /* special_function */
755 "R_PPC_SECTOFF_HI", /* name */
756 FALSE, /* partial_inplace */
757 0, /* src_mask */
758 0xffff, /* dst_mask */
759 FALSE), /* pcrel_offset */
760
761 /* 16-bit upper half adjusted section relative relocation. */
762 HOWTO (R_PPC_SECTOFF_HA, /* type */
763 16, /* rightshift */
764 1, /* size (0 = byte, 1 = short, 2 = long) */
765 16, /* bitsize */
766 FALSE, /* pc_relative */
767 0, /* bitpos */
768 complain_overflow_bitfield, /* complain_on_overflow */
769 ppc_elf_addr16_ha_reloc, /* special_function */
770 "R_PPC_SECTOFF_HA", /* name */
771 FALSE, /* partial_inplace */
772 0, /* src_mask */
773 0xffff, /* dst_mask */
774 FALSE), /* pcrel_offset */
775
776 /* Marker relocs for TLS. */
777 HOWTO (R_PPC_TLS,
778 0, /* rightshift */
779 2, /* size (0 = byte, 1 = short, 2 = long) */
780 32, /* bitsize */
781 FALSE, /* pc_relative */
782 0, /* bitpos */
783 complain_overflow_dont, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 "R_PPC_TLS", /* name */
786 FALSE, /* partial_inplace */
787 0, /* src_mask */
788 0, /* dst_mask */
789 FALSE), /* pcrel_offset */
790
791 HOWTO (R_PPC_TLSGD,
792 0, /* rightshift */
793 2, /* size (0 = byte, 1 = short, 2 = long) */
794 32, /* bitsize */
795 FALSE, /* pc_relative */
796 0, /* bitpos */
797 complain_overflow_dont, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 "R_PPC_TLSGD", /* name */
800 FALSE, /* partial_inplace */
801 0, /* src_mask */
802 0, /* dst_mask */
803 FALSE), /* pcrel_offset */
804
805 HOWTO (R_PPC_TLSLD,
806 0, /* rightshift */
807 2, /* size (0 = byte, 1 = short, 2 = long) */
808 32, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_dont, /* complain_on_overflow */
812 bfd_elf_generic_reloc, /* special_function */
813 "R_PPC_TLSLD", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* Computes the load module index of the load module that contains the
820 definition of its TLS sym. */
821 HOWTO (R_PPC_DTPMOD32,
822 0, /* rightshift */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
824 32, /* bitsize */
825 FALSE, /* pc_relative */
826 0, /* bitpos */
827 complain_overflow_dont, /* complain_on_overflow */
828 ppc_elf_unhandled_reloc, /* special_function */
829 "R_PPC_DTPMOD32", /* name */
830 FALSE, /* partial_inplace */
831 0, /* src_mask */
832 0xffffffff, /* dst_mask */
833 FALSE), /* pcrel_offset */
834
835 /* Computes a dtv-relative displacement, the difference between the value
836 of sym+add and the base address of the thread-local storage block that
837 contains the definition of sym, minus 0x8000. */
838 HOWTO (R_PPC_DTPREL32,
839 0, /* rightshift */
840 2, /* size (0 = byte, 1 = short, 2 = long) */
841 32, /* bitsize */
842 FALSE, /* pc_relative */
843 0, /* bitpos */
844 complain_overflow_dont, /* complain_on_overflow */
845 ppc_elf_unhandled_reloc, /* special_function */
846 "R_PPC_DTPREL32", /* name */
847 FALSE, /* partial_inplace */
848 0, /* src_mask */
849 0xffffffff, /* dst_mask */
850 FALSE), /* pcrel_offset */
851
852 /* A 16 bit dtprel reloc. */
853 HOWTO (R_PPC_DTPREL16,
854 0, /* rightshift */
855 1, /* size (0 = byte, 1 = short, 2 = long) */
856 16, /* bitsize */
857 FALSE, /* pc_relative */
858 0, /* bitpos */
859 complain_overflow_signed, /* complain_on_overflow */
860 ppc_elf_unhandled_reloc, /* special_function */
861 "R_PPC_DTPREL16", /* name */
862 FALSE, /* partial_inplace */
863 0, /* src_mask */
864 0xffff, /* dst_mask */
865 FALSE), /* pcrel_offset */
866
867 /* Like DTPREL16, but no overflow. */
868 HOWTO (R_PPC_DTPREL16_LO,
869 0, /* rightshift */
870 1, /* size (0 = byte, 1 = short, 2 = long) */
871 16, /* bitsize */
872 FALSE, /* pc_relative */
873 0, /* bitpos */
874 complain_overflow_dont, /* complain_on_overflow */
875 ppc_elf_unhandled_reloc, /* special_function */
876 "R_PPC_DTPREL16_LO", /* name */
877 FALSE, /* partial_inplace */
878 0, /* src_mask */
879 0xffff, /* dst_mask */
880 FALSE), /* pcrel_offset */
881
882 /* Like DTPREL16_LO, but next higher group of 16 bits. */
883 HOWTO (R_PPC_DTPREL16_HI,
884 16, /* rightshift */
885 1, /* size (0 = byte, 1 = short, 2 = long) */
886 16, /* bitsize */
887 FALSE, /* pc_relative */
888 0, /* bitpos */
889 complain_overflow_dont, /* complain_on_overflow */
890 ppc_elf_unhandled_reloc, /* special_function */
891 "R_PPC_DTPREL16_HI", /* name */
892 FALSE, /* partial_inplace */
893 0, /* src_mask */
894 0xffff, /* dst_mask */
895 FALSE), /* pcrel_offset */
896
897 /* Like DTPREL16_HI, but adjust for low 16 bits. */
898 HOWTO (R_PPC_DTPREL16_HA,
899 16, /* rightshift */
900 1, /* size (0 = byte, 1 = short, 2 = long) */
901 16, /* bitsize */
902 FALSE, /* pc_relative */
903 0, /* bitpos */
904 complain_overflow_dont, /* complain_on_overflow */
905 ppc_elf_unhandled_reloc, /* special_function */
906 "R_PPC_DTPREL16_HA", /* name */
907 FALSE, /* partial_inplace */
908 0, /* src_mask */
909 0xffff, /* dst_mask */
910 FALSE), /* pcrel_offset */
911
912 /* Computes a tp-relative displacement, the difference between the value of
913 sym+add and the value of the thread pointer (r13). */
914 HOWTO (R_PPC_TPREL32,
915 0, /* rightshift */
916 2, /* size (0 = byte, 1 = short, 2 = long) */
917 32, /* bitsize */
918 FALSE, /* pc_relative */
919 0, /* bitpos */
920 complain_overflow_dont, /* complain_on_overflow */
921 ppc_elf_unhandled_reloc, /* special_function */
922 "R_PPC_TPREL32", /* name */
923 FALSE, /* partial_inplace */
924 0, /* src_mask */
925 0xffffffff, /* dst_mask */
926 FALSE), /* pcrel_offset */
927
928 /* A 16 bit tprel reloc. */
929 HOWTO (R_PPC_TPREL16,
930 0, /* rightshift */
931 1, /* size (0 = byte, 1 = short, 2 = long) */
932 16, /* bitsize */
933 FALSE, /* pc_relative */
934 0, /* bitpos */
935 complain_overflow_signed, /* complain_on_overflow */
936 ppc_elf_unhandled_reloc, /* special_function */
937 "R_PPC_TPREL16", /* name */
938 FALSE, /* partial_inplace */
939 0, /* src_mask */
940 0xffff, /* dst_mask */
941 FALSE), /* pcrel_offset */
942
943 /* Like TPREL16, but no overflow. */
944 HOWTO (R_PPC_TPREL16_LO,
945 0, /* rightshift */
946 1, /* size (0 = byte, 1 = short, 2 = long) */
947 16, /* bitsize */
948 FALSE, /* pc_relative */
949 0, /* bitpos */
950 complain_overflow_dont, /* complain_on_overflow */
951 ppc_elf_unhandled_reloc, /* special_function */
952 "R_PPC_TPREL16_LO", /* name */
953 FALSE, /* partial_inplace */
954 0, /* src_mask */
955 0xffff, /* dst_mask */
956 FALSE), /* pcrel_offset */
957
958 /* Like TPREL16_LO, but next higher group of 16 bits. */
959 HOWTO (R_PPC_TPREL16_HI,
960 16, /* rightshift */
961 1, /* size (0 = byte, 1 = short, 2 = long) */
962 16, /* bitsize */
963 FALSE, /* pc_relative */
964 0, /* bitpos */
965 complain_overflow_dont, /* complain_on_overflow */
966 ppc_elf_unhandled_reloc, /* special_function */
967 "R_PPC_TPREL16_HI", /* name */
968 FALSE, /* partial_inplace */
969 0, /* src_mask */
970 0xffff, /* dst_mask */
971 FALSE), /* pcrel_offset */
972
973 /* Like TPREL16_HI, but adjust for low 16 bits. */
974 HOWTO (R_PPC_TPREL16_HA,
975 16, /* rightshift */
976 1, /* size (0 = byte, 1 = short, 2 = long) */
977 16, /* bitsize */
978 FALSE, /* pc_relative */
979 0, /* bitpos */
980 complain_overflow_dont, /* complain_on_overflow */
981 ppc_elf_unhandled_reloc, /* special_function */
982 "R_PPC_TPREL16_HA", /* name */
983 FALSE, /* partial_inplace */
984 0, /* src_mask */
985 0xffff, /* dst_mask */
986 FALSE), /* pcrel_offset */
987
988 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
989 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
990 to the first entry. */
991 HOWTO (R_PPC_GOT_TLSGD16,
992 0, /* rightshift */
993 1, /* size (0 = byte, 1 = short, 2 = long) */
994 16, /* bitsize */
995 FALSE, /* pc_relative */
996 0, /* bitpos */
997 complain_overflow_signed, /* complain_on_overflow */
998 ppc_elf_unhandled_reloc, /* special_function */
999 "R_PPC_GOT_TLSGD16", /* name */
1000 FALSE, /* partial_inplace */
1001 0, /* src_mask */
1002 0xffff, /* dst_mask */
1003 FALSE), /* pcrel_offset */
1004
1005 /* Like GOT_TLSGD16, but no overflow. */
1006 HOWTO (R_PPC_GOT_TLSGD16_LO,
1007 0, /* rightshift */
1008 1, /* size (0 = byte, 1 = short, 2 = long) */
1009 16, /* bitsize */
1010 FALSE, /* pc_relative */
1011 0, /* bitpos */
1012 complain_overflow_dont, /* complain_on_overflow */
1013 ppc_elf_unhandled_reloc, /* special_function */
1014 "R_PPC_GOT_TLSGD16_LO", /* name */
1015 FALSE, /* partial_inplace */
1016 0, /* src_mask */
1017 0xffff, /* dst_mask */
1018 FALSE), /* pcrel_offset */
1019
1020 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
1021 HOWTO (R_PPC_GOT_TLSGD16_HI,
1022 16, /* rightshift */
1023 1, /* size (0 = byte, 1 = short, 2 = long) */
1024 16, /* bitsize */
1025 FALSE, /* pc_relative */
1026 0, /* bitpos */
1027 complain_overflow_dont, /* complain_on_overflow */
1028 ppc_elf_unhandled_reloc, /* special_function */
1029 "R_PPC_GOT_TLSGD16_HI", /* name */
1030 FALSE, /* partial_inplace */
1031 0, /* src_mask */
1032 0xffff, /* dst_mask */
1033 FALSE), /* pcrel_offset */
1034
1035 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
1036 HOWTO (R_PPC_GOT_TLSGD16_HA,
1037 16, /* rightshift */
1038 1, /* size (0 = byte, 1 = short, 2 = long) */
1039 16, /* bitsize */
1040 FALSE, /* pc_relative */
1041 0, /* bitpos */
1042 complain_overflow_dont, /* complain_on_overflow */
1043 ppc_elf_unhandled_reloc, /* special_function */
1044 "R_PPC_GOT_TLSGD16_HA", /* name */
1045 FALSE, /* partial_inplace */
1046 0, /* src_mask */
1047 0xffff, /* dst_mask */
1048 FALSE), /* pcrel_offset */
1049
1050 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1051 with values (sym+add)@dtpmod and zero, and computes the offset to the
1052 first entry. */
1053 HOWTO (R_PPC_GOT_TLSLD16,
1054 0, /* rightshift */
1055 1, /* size (0 = byte, 1 = short, 2 = long) */
1056 16, /* bitsize */
1057 FALSE, /* pc_relative */
1058 0, /* bitpos */
1059 complain_overflow_signed, /* complain_on_overflow */
1060 ppc_elf_unhandled_reloc, /* special_function */
1061 "R_PPC_GOT_TLSLD16", /* name */
1062 FALSE, /* partial_inplace */
1063 0, /* src_mask */
1064 0xffff, /* dst_mask */
1065 FALSE), /* pcrel_offset */
1066
1067 /* Like GOT_TLSLD16, but no overflow. */
1068 HOWTO (R_PPC_GOT_TLSLD16_LO,
1069 0, /* rightshift */
1070 1, /* size (0 = byte, 1 = short, 2 = long) */
1071 16, /* bitsize */
1072 FALSE, /* pc_relative */
1073 0, /* bitpos */
1074 complain_overflow_dont, /* complain_on_overflow */
1075 ppc_elf_unhandled_reloc, /* special_function */
1076 "R_PPC_GOT_TLSLD16_LO", /* name */
1077 FALSE, /* partial_inplace */
1078 0, /* src_mask */
1079 0xffff, /* dst_mask */
1080 FALSE), /* pcrel_offset */
1081
1082 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1083 HOWTO (R_PPC_GOT_TLSLD16_HI,
1084 16, /* rightshift */
1085 1, /* size (0 = byte, 1 = short, 2 = long) */
1086 16, /* bitsize */
1087 FALSE, /* pc_relative */
1088 0, /* bitpos */
1089 complain_overflow_dont, /* complain_on_overflow */
1090 ppc_elf_unhandled_reloc, /* special_function */
1091 "R_PPC_GOT_TLSLD16_HI", /* name */
1092 FALSE, /* partial_inplace */
1093 0, /* src_mask */
1094 0xffff, /* dst_mask */
1095 FALSE), /* pcrel_offset */
1096
1097 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1098 HOWTO (R_PPC_GOT_TLSLD16_HA,
1099 16, /* rightshift */
1100 1, /* size (0 = byte, 1 = short, 2 = long) */
1101 16, /* bitsize */
1102 FALSE, /* pc_relative */
1103 0, /* bitpos */
1104 complain_overflow_dont, /* complain_on_overflow */
1105 ppc_elf_unhandled_reloc, /* special_function */
1106 "R_PPC_GOT_TLSLD16_HA", /* name */
1107 FALSE, /* partial_inplace */
1108 0, /* src_mask */
1109 0xffff, /* dst_mask */
1110 FALSE), /* pcrel_offset */
1111
1112 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1113 the offset to the entry. */
1114 HOWTO (R_PPC_GOT_DTPREL16,
1115 0, /* rightshift */
1116 1, /* size (0 = byte, 1 = short, 2 = long) */
1117 16, /* bitsize */
1118 FALSE, /* pc_relative */
1119 0, /* bitpos */
1120 complain_overflow_signed, /* complain_on_overflow */
1121 ppc_elf_unhandled_reloc, /* special_function */
1122 "R_PPC_GOT_DTPREL16", /* name */
1123 FALSE, /* partial_inplace */
1124 0, /* src_mask */
1125 0xffff, /* dst_mask */
1126 FALSE), /* pcrel_offset */
1127
1128 /* Like GOT_DTPREL16, but no overflow. */
1129 HOWTO (R_PPC_GOT_DTPREL16_LO,
1130 0, /* rightshift */
1131 1, /* size (0 = byte, 1 = short, 2 = long) */
1132 16, /* bitsize */
1133 FALSE, /* pc_relative */
1134 0, /* bitpos */
1135 complain_overflow_dont, /* complain_on_overflow */
1136 ppc_elf_unhandled_reloc, /* special_function */
1137 "R_PPC_GOT_DTPREL16_LO", /* name */
1138 FALSE, /* partial_inplace */
1139 0, /* src_mask */
1140 0xffff, /* dst_mask */
1141 FALSE), /* pcrel_offset */
1142
1143 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1144 HOWTO (R_PPC_GOT_DTPREL16_HI,
1145 16, /* rightshift */
1146 1, /* size (0 = byte, 1 = short, 2 = long) */
1147 16, /* bitsize */
1148 FALSE, /* pc_relative */
1149 0, /* bitpos */
1150 complain_overflow_dont, /* complain_on_overflow */
1151 ppc_elf_unhandled_reloc, /* special_function */
1152 "R_PPC_GOT_DTPREL16_HI", /* name */
1153 FALSE, /* partial_inplace */
1154 0, /* src_mask */
1155 0xffff, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1157
1158 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1159 HOWTO (R_PPC_GOT_DTPREL16_HA,
1160 16, /* rightshift */
1161 1, /* size (0 = byte, 1 = short, 2 = long) */
1162 16, /* bitsize */
1163 FALSE, /* pc_relative */
1164 0, /* bitpos */
1165 complain_overflow_dont, /* complain_on_overflow */
1166 ppc_elf_unhandled_reloc, /* special_function */
1167 "R_PPC_GOT_DTPREL16_HA", /* name */
1168 FALSE, /* partial_inplace */
1169 0, /* src_mask */
1170 0xffff, /* dst_mask */
1171 FALSE), /* pcrel_offset */
1172
1173 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1174 offset to the entry. */
1175 HOWTO (R_PPC_GOT_TPREL16,
1176 0, /* rightshift */
1177 1, /* size (0 = byte, 1 = short, 2 = long) */
1178 16, /* bitsize */
1179 FALSE, /* pc_relative */
1180 0, /* bitpos */
1181 complain_overflow_signed, /* complain_on_overflow */
1182 ppc_elf_unhandled_reloc, /* special_function */
1183 "R_PPC_GOT_TPREL16", /* name */
1184 FALSE, /* partial_inplace */
1185 0, /* src_mask */
1186 0xffff, /* dst_mask */
1187 FALSE), /* pcrel_offset */
1188
1189 /* Like GOT_TPREL16, but no overflow. */
1190 HOWTO (R_PPC_GOT_TPREL16_LO,
1191 0, /* rightshift */
1192 1, /* size (0 = byte, 1 = short, 2 = long) */
1193 16, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_dont, /* complain_on_overflow */
1197 ppc_elf_unhandled_reloc, /* special_function */
1198 "R_PPC_GOT_TPREL16_LO", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1205 HOWTO (R_PPC_GOT_TPREL16_HI,
1206 16, /* rightshift */
1207 1, /* size (0 = byte, 1 = short, 2 = long) */
1208 16, /* bitsize */
1209 FALSE, /* pc_relative */
1210 0, /* bitpos */
1211 complain_overflow_dont, /* complain_on_overflow */
1212 ppc_elf_unhandled_reloc, /* special_function */
1213 "R_PPC_GOT_TPREL16_HI", /* name */
1214 FALSE, /* partial_inplace */
1215 0, /* src_mask */
1216 0xffff, /* dst_mask */
1217 FALSE), /* pcrel_offset */
1218
1219 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1220 HOWTO (R_PPC_GOT_TPREL16_HA,
1221 16, /* rightshift */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 FALSE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_dont, /* complain_on_overflow */
1227 ppc_elf_unhandled_reloc, /* special_function */
1228 "R_PPC_GOT_TPREL16_HA", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0xffff, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1233
1234 /* The remaining relocs are from the Embedded ELF ABI, and are not
1235 in the SVR4 ELF ABI. */
1236
1237 /* 32 bit value resulting from the addend minus the symbol. */
1238 HOWTO (R_PPC_EMB_NADDR32, /* type */
1239 0, /* rightshift */
1240 2, /* size (0 = byte, 1 = short, 2 = long) */
1241 32, /* bitsize */
1242 FALSE, /* pc_relative */
1243 0, /* bitpos */
1244 complain_overflow_bitfield, /* complain_on_overflow */
1245 bfd_elf_generic_reloc, /* special_function */
1246 "R_PPC_EMB_NADDR32", /* name */
1247 FALSE, /* partial_inplace */
1248 0, /* src_mask */
1249 0xffffffff, /* dst_mask */
1250 FALSE), /* pcrel_offset */
1251
1252 /* 16 bit value resulting from the addend minus the symbol. */
1253 HOWTO (R_PPC_EMB_NADDR16, /* type */
1254 0, /* rightshift */
1255 1, /* size (0 = byte, 1 = short, 2 = long) */
1256 16, /* bitsize */
1257 FALSE, /* pc_relative */
1258 0, /* bitpos */
1259 complain_overflow_bitfield, /* complain_on_overflow */
1260 bfd_elf_generic_reloc, /* special_function */
1261 "R_PPC_EMB_NADDR16", /* name */
1262 FALSE, /* partial_inplace */
1263 0, /* src_mask */
1264 0xffff, /* dst_mask */
1265 FALSE), /* pcrel_offset */
1266
1267 /* 16 bit value resulting from the addend minus the symbol. */
1268 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1269 0, /* rightshift */
1270 1, /* size (0 = byte, 1 = short, 2 = long) */
1271 16, /* bitsize */
1272 FALSE, /* pc_relative */
1273 0, /* bitpos */
1274 complain_overflow_dont,/* complain_on_overflow */
1275 bfd_elf_generic_reloc, /* special_function */
1276 "R_PPC_EMB_ADDR16_LO", /* name */
1277 FALSE, /* partial_inplace */
1278 0, /* src_mask */
1279 0xffff, /* dst_mask */
1280 FALSE), /* pcrel_offset */
1281
1282 /* The high order 16 bits of the addend minus the symbol. */
1283 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1284 16, /* rightshift */
1285 1, /* size (0 = byte, 1 = short, 2 = long) */
1286 16, /* bitsize */
1287 FALSE, /* pc_relative */
1288 0, /* bitpos */
1289 complain_overflow_dont, /* complain_on_overflow */
1290 bfd_elf_generic_reloc, /* special_function */
1291 "R_PPC_EMB_NADDR16_HI", /* name */
1292 FALSE, /* partial_inplace */
1293 0, /* src_mask */
1294 0xffff, /* dst_mask */
1295 FALSE), /* pcrel_offset */
1296
1297 /* The high order 16 bits of the result of the addend minus the address,
1298 plus 1 if the contents of the low 16 bits, treated as a signed number,
1299 is negative. */
1300 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1301 16, /* rightshift */
1302 1, /* size (0 = byte, 1 = short, 2 = long) */
1303 16, /* bitsize */
1304 FALSE, /* pc_relative */
1305 0, /* bitpos */
1306 complain_overflow_dont, /* complain_on_overflow */
1307 ppc_elf_addr16_ha_reloc, /* special_function */
1308 "R_PPC_EMB_NADDR16_HA", /* name */
1309 FALSE, /* partial_inplace */
1310 0, /* src_mask */
1311 0xffff, /* dst_mask */
1312 FALSE), /* pcrel_offset */
1313
1314 /* 16 bit value resulting from allocating a 4 byte word to hold an
1315 address in the .sdata section, and returning the offset from
1316 _SDA_BASE_ for that relocation. */
1317 HOWTO (R_PPC_EMB_SDAI16, /* type */
1318 0, /* rightshift */
1319 1, /* size (0 = byte, 1 = short, 2 = long) */
1320 16, /* bitsize */
1321 FALSE, /* pc_relative */
1322 0, /* bitpos */
1323 complain_overflow_signed, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 "R_PPC_EMB_SDAI16", /* name */
1326 FALSE, /* partial_inplace */
1327 0, /* src_mask */
1328 0xffff, /* dst_mask */
1329 FALSE), /* pcrel_offset */
1330
1331 /* 16 bit value resulting from allocating a 4 byte word to hold an
1332 address in the .sdata2 section, and returning the offset from
1333 _SDA2_BASE_ for that relocation. */
1334 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1335 0, /* rightshift */
1336 1, /* size (0 = byte, 1 = short, 2 = long) */
1337 16, /* bitsize */
1338 FALSE, /* pc_relative */
1339 0, /* bitpos */
1340 complain_overflow_signed, /* complain_on_overflow */
1341 bfd_elf_generic_reloc, /* special_function */
1342 "R_PPC_EMB_SDA2I16", /* name */
1343 FALSE, /* partial_inplace */
1344 0, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1347
1348 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1349 small data items. */
1350 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 FALSE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_signed, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_EMB_SDA2REL", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 FALSE), /* pcrel_offset */
1363
1364 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1365 signed offset from the appropriate base, and filling in the register
1366 field with the appropriate register (0, 2, or 13). */
1367 HOWTO (R_PPC_EMB_SDA21, /* type */
1368 0, /* rightshift */
1369 2, /* size (0 = byte, 1 = short, 2 = long) */
1370 16, /* bitsize */
1371 FALSE, /* pc_relative */
1372 0, /* bitpos */
1373 complain_overflow_signed, /* complain_on_overflow */
1374 bfd_elf_generic_reloc, /* special_function */
1375 "R_PPC_EMB_SDA21", /* name */
1376 FALSE, /* partial_inplace */
1377 0, /* src_mask */
1378 0xffff, /* dst_mask */
1379 FALSE), /* pcrel_offset */
1380
1381 /* Relocation not handled: R_PPC_EMB_MRKREF */
1382 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1383 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1384 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1385 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1386 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1387
1388 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1389 in the 16 bit signed offset from the appropriate base, and filling in the
1390 register field with the appropriate register (0, 2, or 13). */
1391 HOWTO (R_PPC_EMB_RELSDA, /* type */
1392 0, /* rightshift */
1393 1, /* size (0 = byte, 1 = short, 2 = long) */
1394 16, /* bitsize */
1395 FALSE, /* pc_relative */
1396 0, /* bitpos */
1397 complain_overflow_signed, /* complain_on_overflow */
1398 bfd_elf_generic_reloc, /* special_function */
1399 "R_PPC_EMB_RELSDA", /* name */
1400 FALSE, /* partial_inplace */
1401 0, /* src_mask */
1402 0xffff, /* dst_mask */
1403 FALSE), /* pcrel_offset */
1404
1405 /* A relative 8 bit branch. */
1406 HOWTO (R_PPC_VLE_REL8, /* type */
1407 1, /* rightshift */
1408 1, /* size (0 = byte, 1 = short, 2 = long) */
1409 8, /* bitsize */
1410 TRUE, /* pc_relative */
1411 0, /* bitpos */
1412 complain_overflow_signed, /* complain_on_overflow */
1413 bfd_elf_generic_reloc, /* special_function */
1414 "R_PPC_VLE_REL8", /* name */
1415 FALSE, /* partial_inplace */
1416 0, /* src_mask */
1417 0xff, /* dst_mask */
1418 TRUE), /* pcrel_offset */
1419
1420 /* A relative 15 bit branch. */
1421 HOWTO (R_PPC_VLE_REL15, /* type */
1422 1, /* rightshift */
1423 2, /* size (0 = byte, 1 = short, 2 = long) */
1424 15, /* bitsize */
1425 TRUE, /* pc_relative */
1426 1, /* bitpos */
1427 complain_overflow_signed, /* complain_on_overflow */
1428 bfd_elf_generic_reloc, /* special_function */
1429 "R_PPC_VLE_REL15", /* name */
1430 FALSE, /* partial_inplace */
1431 0, /* src_mask */
1432 0xfe, /* dst_mask */
1433 TRUE), /* pcrel_offset */
1434
1435 /* A relative 24 bit branch. */
1436 HOWTO (R_PPC_VLE_REL24, /* type */
1437 1, /* rightshift */
1438 2, /* size (0 = byte, 1 = short, 2 = long) */
1439 24, /* bitsize */
1440 TRUE, /* pc_relative */
1441 1, /* bitpos */
1442 complain_overflow_signed, /* complain_on_overflow */
1443 bfd_elf_generic_reloc, /* special_function */
1444 "R_PPC_VLE_REL24", /* name */
1445 FALSE, /* partial_inplace */
1446 0, /* src_mask */
1447 0x1fffffe, /* dst_mask */
1448 TRUE), /* pcrel_offset */
1449
1450 /* The 16 LSBS in split16a format. */
1451 HOWTO (R_PPC_VLE_LO16A, /* type */
1452 0, /* rightshift */
1453 2, /* size (0 = byte, 1 = short, 2 = long) */
1454 32, /* bitsize */
1455 FALSE, /* pc_relative */
1456 0, /* bitpos */
1457 complain_overflow_bitfield, /* complain_on_overflow */
1458 bfd_elf_generic_reloc, /* special_function */
1459 "R_PPC_VLE_LO16A", /* name */
1460 FALSE, /* partial_inplace */
1461 0, /* src_mask */
1462 0x1f007ff, /* dst_mask */
1463 FALSE), /* pcrel_offset */
1464
1465 /* The 16 LSBS in split16d format. */
1466 HOWTO (R_PPC_VLE_LO16D, /* type */
1467 0, /* rightshift */
1468 2, /* size (0 = byte, 1 = short, 2 = long) */
1469 32, /* bitsize */
1470 FALSE, /* pc_relative */
1471 0, /* bitpos */
1472 complain_overflow_bitfield, /* complain_on_overflow */
1473 bfd_elf_generic_reloc, /* special_function */
1474 "R_PPC_VLE_LO16D", /* name */
1475 FALSE, /* partial_inplace */
1476 0, /* src_mask */
1477 0x1f07ff, /* dst_mask */
1478 FALSE), /* pcrel_offset */
1479
1480 /* Bits 16-31 split16a format. */
1481 HOWTO (R_PPC_VLE_HI16A, /* type */
1482 0, /* rightshift */
1483 2, /* size (0 = byte, 1 = short, 2 = long) */
1484 32, /* bitsize */
1485 FALSE, /* pc_relative */
1486 0, /* bitpos */
1487 complain_overflow_bitfield, /* complain_on_overflow */
1488 bfd_elf_generic_reloc, /* special_function */
1489 "R_PPC_VLE_HI16A", /* name */
1490 FALSE, /* partial_inplace */
1491 0, /* src_mask */
1492 0x1f007ff, /* dst_mask */
1493 FALSE), /* pcrel_offset */
1494
1495 /* Bits 16-31 split16d format. */
1496 HOWTO (R_PPC_VLE_HI16D, /* type */
1497 0, /* rightshift */
1498 2, /* size (0 = byte, 1 = short, 2 = long) */
1499 32, /* bitsize */
1500 FALSE, /* pc_relative */
1501 0, /* bitpos */
1502 complain_overflow_bitfield, /* complain_on_overflow */
1503 bfd_elf_generic_reloc, /* special_function */
1504 "R_PPC_VLE_HI16D", /* name */
1505 FALSE, /* partial_inplace */
1506 0, /* src_mask */
1507 0x1f07ff, /* dst_mask */
1508 FALSE), /* pcrel_offset */
1509
1510 /* Bits 16-31 (High Adjusted) in split16a format. */
1511 HOWTO (R_PPC_VLE_HA16A, /* type */
1512 0, /* rightshift */
1513 2, /* size (0 = byte, 1 = short, 2 = long) */
1514 32, /* bitsize */
1515 FALSE, /* pc_relative */
1516 0, /* bitpos */
1517 complain_overflow_bitfield, /* complain_on_overflow */
1518 bfd_elf_generic_reloc, /* special_function */
1519 "R_PPC_VLE_HA16A", /* name */
1520 FALSE, /* partial_inplace */
1521 0, /* src_mask */
1522 0x1f007ff, /* dst_mask */
1523 FALSE), /* pcrel_offset */
1524
1525 /* Bits 16-31 (High Adjusted) in split16d format. */
1526 HOWTO (R_PPC_VLE_HA16D, /* type */
1527 0, /* rightshift */
1528 2, /* size (0 = byte, 1 = short, 2 = long) */
1529 32, /* bitsize */
1530 FALSE, /* pc_relative */
1531 0, /* bitpos */
1532 complain_overflow_bitfield, /* complain_on_overflow */
1533 bfd_elf_generic_reloc, /* special_function */
1534 "R_PPC_VLE_HA16D", /* name */
1535 FALSE, /* partial_inplace */
1536 0, /* src_mask */
1537 0x1f07ff, /* dst_mask */
1538 FALSE), /* pcrel_offset */
1539
1540 /* This reloc does nothing. */
1541 HOWTO (R_PPC_VLE_SDA21, /* type */
1542 0, /* rightshift */
1543 2, /* size (0 = byte, 1 = short, 2 = long) */
1544 32, /* bitsize */
1545 FALSE, /* pc_relative */
1546 0, /* bitpos */
1547 complain_overflow_bitfield, /* complain_on_overflow */
1548 bfd_elf_generic_reloc, /* special_function */
1549 "R_PPC_VLE_SDA21", /* name */
1550 FALSE, /* partial_inplace */
1551 0, /* src_mask */
1552 0xffff, /* dst_mask */
1553 FALSE), /* pcrel_offset */
1554
1555 /* This reloc does nothing. */
1556 HOWTO (R_PPC_VLE_SDA21_LO, /* type */
1557 0, /* rightshift */
1558 2, /* size (0 = byte, 1 = short, 2 = long) */
1559 32, /* bitsize */
1560 FALSE, /* pc_relative */
1561 0, /* bitpos */
1562 complain_overflow_bitfield, /* complain_on_overflow */
1563 bfd_elf_generic_reloc, /* special_function */
1564 "R_PPC_VLE_SDA21_LO", /* name */
1565 FALSE, /* partial_inplace */
1566 0, /* src_mask */
1567 0, /* dst_mask */
1568 FALSE), /* pcrel_offset */
1569
1570 /* The 16 LSBS relative to _SDA_BASE_ in split16a format. */
1571 HOWTO (R_PPC_VLE_SDAREL_LO16A,/* type */
1572 0, /* rightshift */
1573 2, /* size (0 = byte, 1 = short, 2 = long) */
1574 32, /* bitsize */
1575 FALSE, /* pc_relative */
1576 0, /* bitpos */
1577 complain_overflow_bitfield, /* complain_on_overflow */
1578 bfd_elf_generic_reloc, /* special_function */
1579 "R_PPC_VLE_SDAREL_LO16A", /* name */
1580 FALSE, /* partial_inplace */
1581 0, /* src_mask */
1582 0x1f007ff, /* dst_mask */
1583 FALSE), /* pcrel_offset */
1584
1585 /* The 16 LSBS relative to _SDA_BASE_ in split16d format. */
1586 /* This reloc does nothing. */
1587 HOWTO (R_PPC_VLE_SDAREL_LO16D, /* type */
1588 0, /* rightshift */
1589 2, /* size (0 = byte, 1 = short, 2 = long) */
1590 32, /* bitsize */
1591 FALSE, /* pc_relative */
1592 0, /* bitpos */
1593 complain_overflow_bitfield, /* complain_on_overflow */
1594 bfd_elf_generic_reloc, /* special_function */
1595 "R_PPC_VLE_SDAREL_LO16D", /* name */
1596 FALSE, /* partial_inplace */
1597 0, /* src_mask */
1598 0x1f07ff, /* dst_mask */
1599 FALSE), /* pcrel_offset */
1600
1601 /* Bits 16-31 relative to _SDA_BASE_ in split16a format. */
1602 HOWTO (R_PPC_VLE_SDAREL_HI16A, /* type */
1603 0, /* rightshift */
1604 2, /* size (0 = byte, 1 = short, 2 = long) */
1605 32, /* bitsize */
1606 FALSE, /* pc_relative */
1607 0, /* bitpos */
1608 complain_overflow_bitfield, /* complain_on_overflow */
1609 bfd_elf_generic_reloc, /* special_function */
1610 "R_PPC_VLE_SDAREL_HI16A", /* name */
1611 FALSE, /* partial_inplace */
1612 0, /* src_mask */
1613 0x1f007ff, /* dst_mask */
1614 FALSE), /* pcrel_offset */
1615
1616 /* Bits 16-31 relative to _SDA_BASE_ in split16d format. */
1617 HOWTO (R_PPC_VLE_SDAREL_HI16D, /* type */
1618 0, /* rightshift */
1619 2, /* size (0 = byte, 1 = short, 2 = long) */
1620 32, /* bitsize */
1621 FALSE, /* pc_relative */
1622 0, /* bitpos */
1623 complain_overflow_bitfield, /* complain_on_overflow */
1624 bfd_elf_generic_reloc, /* special_function */
1625 "R_PPC_VLE_SDAREL_HI16D", /* name */
1626 FALSE, /* partial_inplace */
1627 0, /* src_mask */
1628 0x1f07ff, /* dst_mask */
1629 FALSE), /* pcrel_offset */
1630
1631 /* Bits 16-31 (HA) relative to _SDA_BASE split16a format. */
1632 HOWTO (R_PPC_VLE_SDAREL_HA16A, /* type */
1633 0, /* rightshift */
1634 2, /* size (0 = byte, 1 = short, 2 = long) */
1635 32, /* bitsize */
1636 FALSE, /* pc_relative */
1637 0, /* bitpos */
1638 complain_overflow_bitfield, /* complain_on_overflow */
1639 bfd_elf_generic_reloc, /* special_function */
1640 "R_PPC_VLE_SDAREL_HA16A", /* name */
1641 FALSE, /* partial_inplace */
1642 0, /* src_mask */
1643 0x1f007ff, /* dst_mask */
1644 FALSE), /* pcrel_offset */
1645
1646 /* Bits 16-31 (HA) relative to _SDA_BASE split16d format. */
1647 HOWTO (R_PPC_VLE_SDAREL_HA16D, /* type */
1648 0, /* rightshift */
1649 2, /* size (0 = byte, 1 = short, 2 = long) */
1650 32, /* bitsize */
1651 FALSE, /* pc_relative */
1652 0, /* bitpos */
1653 complain_overflow_bitfield, /* complain_on_overflow */
1654 bfd_elf_generic_reloc, /* special_function */
1655 "R_PPC_VLE_SDAREL_HA16D", /* name */
1656 FALSE, /* partial_inplace */
1657 0, /* src_mask */
1658 0x1f07ff, /* dst_mask */
1659 FALSE), /* pcrel_offset */
1660
1661 HOWTO (R_PPC_IRELATIVE, /* type */
1662 0, /* rightshift */
1663 2, /* size (0 = byte, 1 = short, 2 = long) */
1664 32, /* bitsize */
1665 FALSE, /* pc_relative */
1666 0, /* bitpos */
1667 complain_overflow_bitfield, /* complain_on_overflow */
1668 bfd_elf_generic_reloc, /* special_function */
1669 "R_PPC_IRELATIVE", /* name */
1670 FALSE, /* partial_inplace */
1671 0, /* src_mask */
1672 0xffffffff, /* dst_mask */
1673 FALSE), /* pcrel_offset */
1674
1675 /* A 16 bit relative relocation. */
1676 HOWTO (R_PPC_REL16, /* type */
1677 0, /* rightshift */
1678 1, /* size (0 = byte, 1 = short, 2 = long) */
1679 16, /* bitsize */
1680 TRUE, /* pc_relative */
1681 0, /* bitpos */
1682 complain_overflow_bitfield, /* complain_on_overflow */
1683 bfd_elf_generic_reloc, /* special_function */
1684 "R_PPC_REL16", /* name */
1685 FALSE, /* partial_inplace */
1686 0, /* src_mask */
1687 0xffff, /* dst_mask */
1688 TRUE), /* pcrel_offset */
1689
1690 /* A 16 bit relative relocation without overflow. */
1691 HOWTO (R_PPC_REL16_LO, /* type */
1692 0, /* rightshift */
1693 1, /* size (0 = byte, 1 = short, 2 = long) */
1694 16, /* bitsize */
1695 TRUE, /* pc_relative */
1696 0, /* bitpos */
1697 complain_overflow_dont,/* complain_on_overflow */
1698 bfd_elf_generic_reloc, /* special_function */
1699 "R_PPC_REL16_LO", /* name */
1700 FALSE, /* partial_inplace */
1701 0, /* src_mask */
1702 0xffff, /* dst_mask */
1703 TRUE), /* pcrel_offset */
1704
1705 /* The high order 16 bits of a relative address. */
1706 HOWTO (R_PPC_REL16_HI, /* type */
1707 16, /* rightshift */
1708 1, /* size (0 = byte, 1 = short, 2 = long) */
1709 16, /* bitsize */
1710 TRUE, /* pc_relative */
1711 0, /* bitpos */
1712 complain_overflow_dont, /* complain_on_overflow */
1713 bfd_elf_generic_reloc, /* special_function */
1714 "R_PPC_REL16_HI", /* name */
1715 FALSE, /* partial_inplace */
1716 0, /* src_mask */
1717 0xffff, /* dst_mask */
1718 TRUE), /* pcrel_offset */
1719
1720 /* The high order 16 bits of a relative address, plus 1 if the contents of
1721 the low 16 bits, treated as a signed number, is negative. */
1722 HOWTO (R_PPC_REL16_HA, /* type */
1723 16, /* rightshift */
1724 1, /* size (0 = byte, 1 = short, 2 = long) */
1725 16, /* bitsize */
1726 TRUE, /* pc_relative */
1727 0, /* bitpos */
1728 complain_overflow_dont, /* complain_on_overflow */
1729 ppc_elf_addr16_ha_reloc, /* special_function */
1730 "R_PPC_REL16_HA", /* name */
1731 FALSE, /* partial_inplace */
1732 0, /* src_mask */
1733 0xffff, /* dst_mask */
1734 TRUE), /* pcrel_offset */
1735
1736 /* GNU extension to record C++ vtable hierarchy. */
1737 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1738 0, /* rightshift */
1739 0, /* size (0 = byte, 1 = short, 2 = long) */
1740 0, /* bitsize */
1741 FALSE, /* pc_relative */
1742 0, /* bitpos */
1743 complain_overflow_dont, /* complain_on_overflow */
1744 NULL, /* special_function */
1745 "R_PPC_GNU_VTINHERIT", /* name */
1746 FALSE, /* partial_inplace */
1747 0, /* src_mask */
1748 0, /* dst_mask */
1749 FALSE), /* pcrel_offset */
1750
1751 /* GNU extension to record C++ vtable member usage. */
1752 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1753 0, /* rightshift */
1754 0, /* size (0 = byte, 1 = short, 2 = long) */
1755 0, /* bitsize */
1756 FALSE, /* pc_relative */
1757 0, /* bitpos */
1758 complain_overflow_dont, /* complain_on_overflow */
1759 NULL, /* special_function */
1760 "R_PPC_GNU_VTENTRY", /* name */
1761 FALSE, /* partial_inplace */
1762 0, /* src_mask */
1763 0, /* dst_mask */
1764 FALSE), /* pcrel_offset */
1765
1766 /* Phony reloc to handle AIX style TOC entries. */
1767 HOWTO (R_PPC_TOC16, /* type */
1768 0, /* rightshift */
1769 1, /* size (0 = byte, 1 = short, 2 = long) */
1770 16, /* bitsize */
1771 FALSE, /* pc_relative */
1772 0, /* bitpos */
1773 complain_overflow_signed, /* complain_on_overflow */
1774 bfd_elf_generic_reloc, /* special_function */
1775 "R_PPC_TOC16", /* name */
1776 FALSE, /* partial_inplace */
1777 0, /* src_mask */
1778 0xffff, /* dst_mask */
1779 FALSE), /* pcrel_offset */
1780 };
1781
1782 /* External 32-bit PPC structure for PRPSINFO. This structure is
1783 ABI-defined, thus we choose to use char arrays here in order to
1784 avoid dealing with different types in different architectures.
1785
1786 The PPC 32-bit structure uses int for `pr_uid' and `pr_gid' while
1787 most non-PPC architectures use `short int'.
1788
1789 This structure will ultimately be written in the corefile's note
1790 section, as the PRPSINFO. */
1791
1792 struct elf_external_ppc_linux_prpsinfo32
1793 {
1794 char pr_state; /* Numeric process state. */
1795 char pr_sname; /* Char for pr_state. */
1796 char pr_zomb; /* Zombie. */
1797 char pr_nice; /* Nice val. */
1798 char pr_flag[4]; /* Flags. */
1799 char pr_uid[4];
1800 char pr_gid[4];
1801 char pr_pid[4];
1802 char pr_ppid[4];
1803 char pr_pgrp[4];
1804 char pr_sid[4];
1805 char pr_fname[16]; /* Filename of executable. */
1806 char pr_psargs[80]; /* Initial part of arg list. */
1807 };
1808
1809 /* Helper macro to swap (properly handling endianess) things from the
1810 `elf_internal_prpsinfo' structure to the `elf_external_ppc_prpsinfo32'
1811 structure.
1812
1813 Note that FROM should be a pointer, and TO should be the explicit type. */
1814
1815 #define PPC_LINUX_PRPSINFO32_SWAP_FIELDS(abfd, from, to) \
1816 do \
1817 { \
1818 H_PUT_8 (abfd, from->pr_state, &to.pr_state); \
1819 H_PUT_8 (abfd, from->pr_sname, &to.pr_sname); \
1820 H_PUT_8 (abfd, from->pr_zomb, &to.pr_zomb); \
1821 H_PUT_8 (abfd, from->pr_nice, &to.pr_nice); \
1822 H_PUT_32 (abfd, from->pr_flag, to.pr_flag); \
1823 H_PUT_32 (abfd, from->pr_uid, to.pr_uid); \
1824 H_PUT_32 (abfd, from->pr_gid, to.pr_gid); \
1825 H_PUT_32 (abfd, from->pr_pid, to.pr_pid); \
1826 H_PUT_32 (abfd, from->pr_ppid, to.pr_ppid); \
1827 H_PUT_32 (abfd, from->pr_pgrp, to.pr_pgrp); \
1828 H_PUT_32 (abfd, from->pr_sid, to.pr_sid); \
1829 strncpy (to.pr_fname, from->pr_fname, sizeof (to.pr_fname)); \
1830 strncpy (to.pr_psargs, from->pr_psargs, sizeof (to.pr_psargs)); \
1831 } while (0)
1832
1833 \f
1834 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1835
1836 static void
1837 ppc_elf_howto_init (void)
1838 {
1839 unsigned int i, type;
1840
1841 for (i = 0;
1842 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1843 i++)
1844 {
1845 type = ppc_elf_howto_raw[i].type;
1846 if (type >= (sizeof (ppc_elf_howto_table)
1847 / sizeof (ppc_elf_howto_table[0])))
1848 abort ();
1849 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1850 }
1851 }
1852
1853 static reloc_howto_type *
1854 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1855 bfd_reloc_code_real_type code)
1856 {
1857 enum elf_ppc_reloc_type r;
1858
1859 /* Initialize howto table if not already done. */
1860 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1861 ppc_elf_howto_init ();
1862
1863 switch (code)
1864 {
1865 default:
1866 return NULL;
1867
1868 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1869 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1870 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1871 case BFD_RELOC_PPC64_ADDR16_DS:
1872 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1873 case BFD_RELOC_PPC64_ADDR16_LO_DS:
1874 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1875 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1876 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1877 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1878 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1879 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1880 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1881 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1882 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1883 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1884 case BFD_RELOC_PPC64_GOT16_DS:
1885 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1886 case BFD_RELOC_PPC64_GOT16_LO_DS:
1887 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1888 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1889 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1890 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1891 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1892 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1893 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1894 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1895 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1896 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1897 case BFD_RELOC_PPC64_PLT16_LO_DS:
1898 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1899 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1900 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1901 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1902 case BFD_RELOC_PPC64_SECTOFF_DS:
1903 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1904 case BFD_RELOC_PPC64_SECTOFF_LO_DS:
1905 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1906 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1907 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1908 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1909 case BFD_RELOC_PPC64_TOC16_DS:
1910 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1911 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1912 case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break;
1913 case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break;
1914 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1915 case BFD_RELOC_PPC64_TPREL16_DS:
1916 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1917 case BFD_RELOC_PPC64_TPREL16_LO_DS:
1918 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1919 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1920 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1921 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1922 case BFD_RELOC_PPC64_DTPREL16_DS:
1923 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1924 case BFD_RELOC_PPC64_DTPREL16_LO_DS:
1925 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1926 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1927 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1928 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1929 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1930 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1931 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1932 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1933 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1934 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1935 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1936 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1937 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1938 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1939 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1940 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1941 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1942 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1943 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1944 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1945 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1946 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1947 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1948 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1949 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1950 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1951 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1952 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1953 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1954 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1955 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1956 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1957 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1958 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1959 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1960 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1961 case BFD_RELOC_PPC_VLE_REL8: r = R_PPC_VLE_REL8; break;
1962 case BFD_RELOC_PPC_VLE_REL15: r = R_PPC_VLE_REL15; break;
1963 case BFD_RELOC_PPC_VLE_REL24: r = R_PPC_VLE_REL24; break;
1964 case BFD_RELOC_PPC_VLE_LO16A: r = R_PPC_VLE_LO16A; break;
1965 case BFD_RELOC_PPC_VLE_LO16D: r = R_PPC_VLE_LO16D; break;
1966 case BFD_RELOC_PPC_VLE_HI16A: r = R_PPC_VLE_HI16A; break;
1967 case BFD_RELOC_PPC_VLE_HI16D: r = R_PPC_VLE_HI16D; break;
1968 case BFD_RELOC_PPC_VLE_HA16A: r = R_PPC_VLE_HA16A; break;
1969 case BFD_RELOC_PPC_VLE_HA16D: r = R_PPC_VLE_HA16D; break;
1970 case BFD_RELOC_PPC_VLE_SDA21: r = R_PPC_VLE_SDA21; break;
1971 case BFD_RELOC_PPC_VLE_SDA21_LO: r = R_PPC_VLE_SDA21_LO; break;
1972 case BFD_RELOC_PPC_VLE_SDAREL_LO16A:
1973 r = R_PPC_VLE_SDAREL_LO16A;
1974 break;
1975 case BFD_RELOC_PPC_VLE_SDAREL_LO16D:
1976 r = R_PPC_VLE_SDAREL_LO16D;
1977 break;
1978 case BFD_RELOC_PPC_VLE_SDAREL_HI16A:
1979 r = R_PPC_VLE_SDAREL_HI16A;
1980 break;
1981 case BFD_RELOC_PPC_VLE_SDAREL_HI16D:
1982 r = R_PPC_VLE_SDAREL_HI16D;
1983 break;
1984 case BFD_RELOC_PPC_VLE_SDAREL_HA16A:
1985 r = R_PPC_VLE_SDAREL_HA16A;
1986 break;
1987 case BFD_RELOC_PPC_VLE_SDAREL_HA16D:
1988 r = R_PPC_VLE_SDAREL_HA16D;
1989 break;
1990 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1991 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1992 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1993 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1994 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1995 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1996 }
1997
1998 return ppc_elf_howto_table[r];
1999 };
2000
2001 static reloc_howto_type *
2002 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
2003 const char *r_name)
2004 {
2005 unsigned int i;
2006
2007 for (i = 0;
2008 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
2009 i++)
2010 if (ppc_elf_howto_raw[i].name != NULL
2011 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
2012 return &ppc_elf_howto_raw[i];
2013
2014 return NULL;
2015 }
2016
2017 /* Set the howto pointer for a PowerPC ELF reloc. */
2018
2019 static void
2020 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
2021 arelent *cache_ptr,
2022 Elf_Internal_Rela *dst)
2023 {
2024 /* Initialize howto table if not already done. */
2025 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2026 ppc_elf_howto_init ();
2027
2028 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
2029 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
2030
2031 /* Just because the above assert didn't trigger doesn't mean that
2032 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
2033 if (!cache_ptr->howto)
2034 {
2035 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
2036 abfd, ELF32_R_TYPE (dst->r_info));
2037 bfd_set_error (bfd_error_bad_value);
2038
2039 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
2040 }
2041 }
2042
2043 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
2044
2045 static bfd_reloc_status_type
2046 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
2047 arelent *reloc_entry,
2048 asymbol *symbol,
2049 void *data ATTRIBUTE_UNUSED,
2050 asection *input_section,
2051 bfd *output_bfd,
2052 char **error_message ATTRIBUTE_UNUSED)
2053 {
2054 bfd_vma relocation;
2055
2056 if (output_bfd != NULL)
2057 {
2058 reloc_entry->address += input_section->output_offset;
2059 return bfd_reloc_ok;
2060 }
2061
2062 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
2063 return bfd_reloc_outofrange;
2064
2065 if (bfd_is_com_section (symbol->section))
2066 relocation = 0;
2067 else
2068 relocation = symbol->value;
2069
2070 relocation += symbol->section->output_section->vma;
2071 relocation += symbol->section->output_offset;
2072 relocation += reloc_entry->addend;
2073 if (reloc_entry->howto->pc_relative)
2074 relocation -= reloc_entry->address;
2075
2076 reloc_entry->addend += (relocation & 0x8000) << 1;
2077
2078 return bfd_reloc_continue;
2079 }
2080
2081 static bfd_reloc_status_type
2082 ppc_elf_unhandled_reloc (bfd *abfd,
2083 arelent *reloc_entry,
2084 asymbol *symbol,
2085 void *data,
2086 asection *input_section,
2087 bfd *output_bfd,
2088 char **error_message)
2089 {
2090 /* If this is a relocatable link (output_bfd test tells us), just
2091 call the generic function. Any adjustment will be done at final
2092 link time. */
2093 if (output_bfd != NULL)
2094 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
2095 input_section, output_bfd, error_message);
2096
2097 if (error_message != NULL)
2098 {
2099 static char buf[60];
2100 sprintf (buf, _("generic linker can't handle %s"),
2101 reloc_entry->howto->name);
2102 *error_message = buf;
2103 }
2104 return bfd_reloc_dangerous;
2105 }
2106 \f
2107 /* Sections created by the linker. */
2108
2109 typedef struct elf_linker_section
2110 {
2111 /* Pointer to the bfd section. */
2112 asection *section;
2113 /* Section name. */
2114 const char *name;
2115 /* Associated bss section name. */
2116 const char *bss_name;
2117 /* Associated symbol name. */
2118 const char *sym_name;
2119 /* Associated symbol. */
2120 struct elf_link_hash_entry *sym;
2121 } elf_linker_section_t;
2122
2123 /* Linked list of allocated pointer entries. This hangs off of the
2124 symbol lists, and provides allows us to return different pointers,
2125 based on different addend's. */
2126
2127 typedef struct elf_linker_section_pointers
2128 {
2129 /* next allocated pointer for this symbol */
2130 struct elf_linker_section_pointers *next;
2131 /* offset of pointer from beginning of section */
2132 bfd_vma offset;
2133 /* addend used */
2134 bfd_vma addend;
2135 /* which linker section this is */
2136 elf_linker_section_t *lsect;
2137 } elf_linker_section_pointers_t;
2138
2139 struct ppc_elf_obj_tdata
2140 {
2141 struct elf_obj_tdata elf;
2142
2143 /* A mapping from local symbols to offsets into the various linker
2144 sections added. This is index by the symbol index. */
2145 elf_linker_section_pointers_t **linker_section_pointers;
2146
2147 /* Flags used to auto-detect plt type. */
2148 unsigned int makes_plt_call : 1;
2149 unsigned int has_rel16 : 1;
2150 };
2151
2152 #define ppc_elf_tdata(bfd) \
2153 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
2154
2155 #define elf_local_ptr_offsets(bfd) \
2156 (ppc_elf_tdata (bfd)->linker_section_pointers)
2157
2158 #define is_ppc_elf(bfd) \
2159 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2160 && elf_object_id (bfd) == PPC32_ELF_DATA)
2161
2162 /* Override the generic function because we store some extras. */
2163
2164 static bfd_boolean
2165 ppc_elf_mkobject (bfd *abfd)
2166 {
2167 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
2168 PPC32_ELF_DATA);
2169 }
2170
2171 /* Fix bad default arch selected for a 32 bit input bfd when the
2172 default is 64 bit. */
2173
2174 static bfd_boolean
2175 ppc_elf_object_p (bfd *abfd)
2176 {
2177 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
2178 {
2179 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
2180
2181 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
2182 {
2183 /* Relies on arch after 64 bit default being 32 bit default. */
2184 abfd->arch_info = abfd->arch_info->next;
2185 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
2186 }
2187 }
2188 return TRUE;
2189 }
2190
2191 /* Function to set whether a module needs the -mrelocatable bit set. */
2192
2193 static bfd_boolean
2194 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
2195 {
2196 BFD_ASSERT (!elf_flags_init (abfd)
2197 || elf_elfheader (abfd)->e_flags == flags);
2198
2199 elf_elfheader (abfd)->e_flags = flags;
2200 elf_flags_init (abfd) = TRUE;
2201 return TRUE;
2202 }
2203
2204 /* Support for core dump NOTE sections. */
2205
2206 static bfd_boolean
2207 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2208 {
2209 int offset;
2210 unsigned int size;
2211
2212 switch (note->descsz)
2213 {
2214 default:
2215 return FALSE;
2216
2217 case 268: /* Linux/PPC. */
2218 /* pr_cursig */
2219 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2220
2221 /* pr_pid */
2222 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2223
2224 /* pr_reg */
2225 offset = 72;
2226 size = 192;
2227
2228 break;
2229 }
2230
2231 /* Make a ".reg/999" section. */
2232 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
2233 size, note->descpos + offset);
2234 }
2235
2236 static bfd_boolean
2237 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
2238 {
2239 switch (note->descsz)
2240 {
2241 default:
2242 return FALSE;
2243
2244 case 128: /* Linux/PPC elf_prpsinfo. */
2245 elf_tdata (abfd)->core->pid
2246 = bfd_get_32 (abfd, note->descdata + 16);
2247 elf_tdata (abfd)->core->program
2248 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
2249 elf_tdata (abfd)->core->command
2250 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
2251 }
2252
2253 /* Note that for some reason, a spurious space is tacked
2254 onto the end of the args in some (at least one anyway)
2255 implementations, so strip it off if it exists. */
2256
2257 {
2258 char *command = elf_tdata (abfd)->core->command;
2259 int n = strlen (command);
2260
2261 if (0 < n && command[n - 1] == ' ')
2262 command[n - 1] = '\0';
2263 }
2264
2265 return TRUE;
2266 }
2267
2268 char *
2269 elfcore_write_ppc_linux_prpsinfo32 (bfd *abfd, char *buf, int *bufsiz,
2270 const struct elf_internal_linux_prpsinfo *prpsinfo)
2271 {
2272 struct elf_external_ppc_linux_prpsinfo32 data;
2273
2274 memset (&data, 0, sizeof (data));
2275 PPC_LINUX_PRPSINFO32_SWAP_FIELDS (abfd, prpsinfo, data);
2276
2277 return elfcore_write_note (abfd, buf, bufsiz,
2278 "CORE", NT_PRPSINFO, &data, sizeof (data));
2279 }
2280
2281 static char *
2282 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
2283 {
2284 switch (note_type)
2285 {
2286 default:
2287 return NULL;
2288
2289 case NT_PRPSINFO:
2290 {
2291 char data[128];
2292 va_list ap;
2293
2294 va_start (ap, note_type);
2295 memset (data, 0, sizeof (data));
2296 strncpy (data + 32, va_arg (ap, const char *), 16);
2297 strncpy (data + 48, va_arg (ap, const char *), 80);
2298 va_end (ap);
2299 return elfcore_write_note (abfd, buf, bufsiz,
2300 "CORE", note_type, data, sizeof (data));
2301 }
2302
2303 case NT_PRSTATUS:
2304 {
2305 char data[268];
2306 va_list ap;
2307 long pid;
2308 int cursig;
2309 const void *greg;
2310
2311 va_start (ap, note_type);
2312 memset (data, 0, 72);
2313 pid = va_arg (ap, long);
2314 bfd_put_32 (abfd, pid, data + 24);
2315 cursig = va_arg (ap, int);
2316 bfd_put_16 (abfd, cursig, data + 12);
2317 greg = va_arg (ap, const void *);
2318 memcpy (data + 72, greg, 192);
2319 memset (data + 264, 0, 4);
2320 va_end (ap);
2321 return elfcore_write_note (abfd, buf, bufsiz,
2322 "CORE", note_type, data, sizeof (data));
2323 }
2324 }
2325 }
2326
2327 static flagword
2328 ppc_elf_lookup_section_flags (char *flag_name)
2329 {
2330
2331 if (!strcmp (flag_name, "SHF_PPC_VLE"))
2332 return SHF_PPC_VLE;
2333
2334 return 0;
2335 }
2336
2337 /* Add the VLE flag if required. */
2338
2339 bfd_boolean
2340 ppc_elf_section_processing (bfd *abfd, Elf_Internal_Shdr *shdr)
2341 {
2342 if (bfd_get_mach (abfd) == bfd_mach_ppc_vle
2343 && (shdr->sh_flags & SHF_EXECINSTR) != 0)
2344 shdr->sh_flags |= SHF_PPC_VLE;
2345
2346 return TRUE;
2347 }
2348
2349 /* Return address for Ith PLT stub in section PLT, for relocation REL
2350 or (bfd_vma) -1 if it should not be included. */
2351
2352 static bfd_vma
2353 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
2354 const asection *plt ATTRIBUTE_UNUSED,
2355 const arelent *rel)
2356 {
2357 return rel->address;
2358 }
2359
2360 /* Handle a PowerPC specific section when reading an object file. This
2361 is called when bfd_section_from_shdr finds a section with an unknown
2362 type. */
2363
2364 static bfd_boolean
2365 ppc_elf_section_from_shdr (bfd *abfd,
2366 Elf_Internal_Shdr *hdr,
2367 const char *name,
2368 int shindex)
2369 {
2370 asection *newsect;
2371 flagword flags;
2372
2373 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2374 return FALSE;
2375
2376 newsect = hdr->bfd_section;
2377 flags = bfd_get_section_flags (abfd, newsect);
2378 if (hdr->sh_flags & SHF_EXCLUDE)
2379 flags |= SEC_EXCLUDE;
2380
2381 if (hdr->sh_type == SHT_ORDERED)
2382 flags |= SEC_SORT_ENTRIES;
2383
2384 bfd_set_section_flags (abfd, newsect, flags);
2385 return TRUE;
2386 }
2387
2388 /* Set up any other section flags and such that may be necessary. */
2389
2390 static bfd_boolean
2391 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2392 Elf_Internal_Shdr *shdr,
2393 asection *asect)
2394 {
2395 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
2396 shdr->sh_type = SHT_ORDERED;
2397
2398 return TRUE;
2399 }
2400
2401 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
2402 need to bump up the number of section headers. */
2403
2404 static int
2405 ppc_elf_additional_program_headers (bfd *abfd,
2406 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2407 {
2408 asection *s;
2409 int ret = 0;
2410
2411 s = bfd_get_section_by_name (abfd, ".sbss2");
2412 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2413 ++ret;
2414
2415 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
2416 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
2417 ++ret;
2418
2419 return ret;
2420 }
2421
2422 /* Modify the segment map for VLE executables. */
2423
2424 bfd_boolean
2425 ppc_elf_modify_segment_map (bfd *abfd,
2426 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2427 {
2428 struct elf_segment_map *m, *n;
2429 bfd_size_type amt;
2430 unsigned int j, k;
2431 bfd_boolean sect0_vle, sectj_vle;
2432
2433 /* At this point in the link, output sections have already been sorted by
2434 LMA and assigned to segments. All that is left to do is to ensure
2435 there is no mixing of VLE & non-VLE sections in a text segment.
2436 If we find that case, we split the segment.
2437 We maintain the original output section order. */
2438
2439 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
2440 {
2441 if (m->count == 0)
2442 continue;
2443
2444 sect0_vle = (elf_section_flags (m->sections[0]) & SHF_PPC_VLE) != 0;
2445 for (j = 1; j < m->count; ++j)
2446 {
2447 sectj_vle = (elf_section_flags (m->sections[j]) & SHF_PPC_VLE) != 0;
2448
2449 if (sectj_vle != sect0_vle)
2450 break;
2451 }
2452 if (j >= m->count)
2453 continue;
2454
2455 /* sections 0..j-1 stay in this (current) segment,
2456 the remainder are put in a new segment.
2457 The scan resumes with the new segment. */
2458
2459 /* Fix the new segment. */
2460 amt = sizeof (struct elf_segment_map);
2461 amt += (m->count - j - 1) * sizeof (asection *);
2462 n = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
2463 if (n == NULL)
2464 return FALSE;
2465
2466 n->p_type = PT_LOAD;
2467 n->p_flags = PF_X | PF_R;
2468 if (sectj_vle)
2469 n->p_flags |= PF_PPC_VLE;
2470 n->count = m->count - j;
2471 for (k = 0; k < n->count; ++k)
2472 {
2473 n->sections[k] = m->sections[j+k];
2474 m->sections[j+k] = NULL;
2475 }
2476 n->next = m->next;
2477 m->next = n;
2478
2479 /* Fix the current segment */
2480 m->count = j;
2481 }
2482
2483 return TRUE;
2484 }
2485
2486 /* Add extra PPC sections -- Note, for now, make .sbss2 and
2487 .PPC.EMB.sbss0 a normal section, and not a bss section so
2488 that the linker doesn't crater when trying to make more than
2489 2 sections. */
2490
2491 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
2492 {
2493 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
2494 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
2495 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
2496 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
2497 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
2498 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
2499 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
2500 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
2501 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
2502 { NULL, 0, 0, 0, 0 }
2503 };
2504
2505 /* This is what we want for new plt/got. */
2506 static struct bfd_elf_special_section ppc_alt_plt =
2507 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
2508
2509 static const struct bfd_elf_special_section *
2510 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2511 {
2512 const struct bfd_elf_special_section *ssect;
2513
2514 /* See if this is one of the special sections. */
2515 if (sec->name == NULL)
2516 return NULL;
2517
2518 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2519 sec->use_rela_p);
2520 if (ssect != NULL)
2521 {
2522 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2523 ssect = &ppc_alt_plt;
2524 return ssect;
2525 }
2526
2527 return _bfd_elf_get_sec_type_attr (abfd, sec);
2528 }
2529 \f
2530 /* Very simple linked list structure for recording apuinfo values. */
2531 typedef struct apuinfo_list
2532 {
2533 struct apuinfo_list *next;
2534 unsigned long value;
2535 }
2536 apuinfo_list;
2537
2538 static apuinfo_list *head;
2539 static bfd_boolean apuinfo_set;
2540
2541 static void
2542 apuinfo_list_init (void)
2543 {
2544 head = NULL;
2545 apuinfo_set = FALSE;
2546 }
2547
2548 static void
2549 apuinfo_list_add (unsigned long value)
2550 {
2551 apuinfo_list *entry = head;
2552
2553 while (entry != NULL)
2554 {
2555 if (entry->value == value)
2556 return;
2557 entry = entry->next;
2558 }
2559
2560 entry = bfd_malloc (sizeof (* entry));
2561 if (entry == NULL)
2562 return;
2563
2564 entry->value = value;
2565 entry->next = head;
2566 head = entry;
2567 }
2568
2569 static unsigned
2570 apuinfo_list_length (void)
2571 {
2572 apuinfo_list *entry;
2573 unsigned long count;
2574
2575 for (entry = head, count = 0;
2576 entry;
2577 entry = entry->next)
2578 ++ count;
2579
2580 return count;
2581 }
2582
2583 static inline unsigned long
2584 apuinfo_list_element (unsigned long number)
2585 {
2586 apuinfo_list * entry;
2587
2588 for (entry = head;
2589 entry && number --;
2590 entry = entry->next)
2591 ;
2592
2593 return entry ? entry->value : 0;
2594 }
2595
2596 static void
2597 apuinfo_list_finish (void)
2598 {
2599 apuinfo_list *entry;
2600
2601 for (entry = head; entry;)
2602 {
2603 apuinfo_list *next = entry->next;
2604 free (entry);
2605 entry = next;
2606 }
2607
2608 head = NULL;
2609 }
2610
2611 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2612 #define APUINFO_LABEL "APUinfo"
2613
2614 /* Scan the input BFDs and create a linked list of
2615 the APUinfo values that will need to be emitted. */
2616
2617 static void
2618 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2619 {
2620 bfd *ibfd;
2621 asection *asec;
2622 char *buffer = NULL;
2623 bfd_size_type largest_input_size = 0;
2624 unsigned i;
2625 unsigned long length;
2626 const char *error_message = NULL;
2627
2628 if (link_info == NULL)
2629 return;
2630
2631 apuinfo_list_init ();
2632
2633 /* Read in the input sections contents. */
2634 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2635 {
2636 unsigned long datum;
2637
2638 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2639 if (asec == NULL)
2640 continue;
2641
2642 error_message = _("corrupt %s section in %B");
2643 length = asec->size;
2644 if (length < 20)
2645 goto fail;
2646
2647 apuinfo_set = TRUE;
2648 if (largest_input_size < asec->size)
2649 {
2650 if (buffer)
2651 free (buffer);
2652 largest_input_size = asec->size;
2653 buffer = bfd_malloc (largest_input_size);
2654 if (!buffer)
2655 return;
2656 }
2657
2658 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2659 || (bfd_bread (buffer, length, ibfd) != length))
2660 {
2661 error_message = _("unable to read in %s section from %B");
2662 goto fail;
2663 }
2664
2665 /* Verify the contents of the header. Note - we have to
2666 extract the values this way in order to allow for a
2667 host whose endian-ness is different from the target. */
2668 datum = bfd_get_32 (ibfd, buffer);
2669 if (datum != sizeof APUINFO_LABEL)
2670 goto fail;
2671
2672 datum = bfd_get_32 (ibfd, buffer + 8);
2673 if (datum != 0x2)
2674 goto fail;
2675
2676 if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
2677 goto fail;
2678
2679 /* Get the number of bytes used for apuinfo entries. */
2680 datum = bfd_get_32 (ibfd, buffer + 4);
2681 if (datum + 20 != length)
2682 goto fail;
2683
2684 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2685 for (i = 0; i < datum; i += 4)
2686 apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
2687 }
2688
2689 error_message = NULL;
2690
2691 if (apuinfo_set)
2692 {
2693 /* Compute the size of the output section. */
2694 unsigned num_entries = apuinfo_list_length ();
2695
2696 /* Set the output section size, if it exists. */
2697 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2698
2699 if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
2700 {
2701 ibfd = abfd;
2702 error_message = _("warning: unable to set size of %s section in %B");
2703 }
2704 }
2705
2706 fail:
2707 if (buffer)
2708 free (buffer);
2709
2710 if (error_message)
2711 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2712 }
2713
2714 /* Prevent the output section from accumulating the input sections'
2715 contents. We have already stored this in our linked list structure. */
2716
2717 static bfd_boolean
2718 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2719 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2720 asection *asec,
2721 bfd_byte *contents ATTRIBUTE_UNUSED)
2722 {
2723 return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
2724 }
2725
2726 /* Finally we can generate the output section. */
2727
2728 static void
2729 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2730 {
2731 bfd_byte *buffer;
2732 asection *asec;
2733 unsigned i;
2734 unsigned num_entries;
2735 bfd_size_type length;
2736
2737 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2738 if (asec == NULL)
2739 return;
2740
2741 if (!apuinfo_set)
2742 return;
2743
2744 length = asec->size;
2745 if (length < 20)
2746 return;
2747
2748 buffer = bfd_malloc (length);
2749 if (buffer == NULL)
2750 {
2751 (*_bfd_error_handler)
2752 (_("failed to allocate space for new APUinfo section."));
2753 return;
2754 }
2755
2756 /* Create the apuinfo header. */
2757 num_entries = apuinfo_list_length ();
2758 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2759 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2760 bfd_put_32 (abfd, 0x2, buffer + 8);
2761 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2762
2763 length = 20;
2764 for (i = 0; i < num_entries; i++)
2765 {
2766 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2767 length += 4;
2768 }
2769
2770 if (length != asec->size)
2771 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2772
2773 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2774 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2775
2776 free (buffer);
2777
2778 apuinfo_list_finish ();
2779 }
2780 \f
2781 static bfd_boolean
2782 is_nonpic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2783 {
2784 bfd_byte buf[GLINK_ENTRY_SIZE];
2785
2786 if (!bfd_get_section_contents (abfd, glink, buf, off, GLINK_ENTRY_SIZE))
2787 return FALSE;
2788
2789 return ((bfd_get_32 (abfd, buf + 0) & 0xffff0000) == LIS_11
2790 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2791 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2792 && bfd_get_32 (abfd, buf + 12) == BCTR);
2793 }
2794
2795 static bfd_boolean
2796 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2797 {
2798 bfd_vma vma = *(bfd_vma *) ptr;
2799 return ((section->flags & SEC_ALLOC) != 0
2800 && section->vma <= vma
2801 && vma < section->vma + section->size);
2802 }
2803
2804 static long
2805 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2806 long dynsymcount, asymbol **dynsyms,
2807 asymbol **ret)
2808 {
2809 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2810 asection *plt, *relplt, *dynamic, *glink;
2811 bfd_vma glink_vma = 0;
2812 bfd_vma resolv_vma = 0;
2813 bfd_vma stub_vma;
2814 asymbol *s;
2815 arelent *p;
2816 long count, i;
2817 size_t size;
2818 char *names;
2819 bfd_byte buf[4];
2820
2821 *ret = NULL;
2822
2823 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2824 return 0;
2825
2826 if (dynsymcount <= 0)
2827 return 0;
2828
2829 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2830 if (relplt == NULL)
2831 return 0;
2832
2833 plt = bfd_get_section_by_name (abfd, ".plt");
2834 if (plt == NULL)
2835 return 0;
2836
2837 /* Call common code to handle old-style executable PLTs. */
2838 if (elf_section_flags (plt) & SHF_EXECINSTR)
2839 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2840 dynsymcount, dynsyms, ret);
2841
2842 /* If this object was prelinked, the prelinker stored the address
2843 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2844 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2845 if (dynamic != NULL)
2846 {
2847 bfd_byte *dynbuf, *extdyn, *extdynend;
2848 size_t extdynsize;
2849 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2850
2851 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2852 return -1;
2853
2854 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2855 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2856
2857 extdyn = dynbuf;
2858 extdynend = extdyn + dynamic->size;
2859 for (; extdyn < extdynend; extdyn += extdynsize)
2860 {
2861 Elf_Internal_Dyn dyn;
2862 (*swap_dyn_in) (abfd, extdyn, &dyn);
2863
2864 if (dyn.d_tag == DT_NULL)
2865 break;
2866
2867 if (dyn.d_tag == DT_PPC_GOT)
2868 {
2869 unsigned int g_o_t = dyn.d_un.d_val;
2870 asection *got = bfd_get_section_by_name (abfd, ".got");
2871 if (got != NULL
2872 && bfd_get_section_contents (abfd, got, buf,
2873 g_o_t - got->vma + 4, 4))
2874 glink_vma = bfd_get_32 (abfd, buf);
2875 break;
2876 }
2877 }
2878 free (dynbuf);
2879 }
2880
2881 /* Otherwise we read the first plt entry. */
2882 if (glink_vma == 0)
2883 {
2884 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2885 glink_vma = bfd_get_32 (abfd, buf);
2886 }
2887
2888 if (glink_vma == 0)
2889 return 0;
2890
2891 /* The .glink section usually does not survive the final
2892 link; search for the section (usually .text) where the
2893 glink stubs now reside. */
2894 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2895 if (glink == NULL)
2896 return 0;
2897
2898 /* Determine glink PLT resolver by reading the relative branch
2899 from the first glink stub. */
2900 if (bfd_get_section_contents (abfd, glink, buf,
2901 glink_vma - glink->vma, 4))
2902 {
2903 unsigned int insn = bfd_get_32 (abfd, buf);
2904
2905 /* The first glink stub may either branch to the resolver ... */
2906 insn ^= B;
2907 if ((insn & ~0x3fffffc) == 0)
2908 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2909
2910 /* ... or fall through a bunch of NOPs. */
2911 else if ((insn ^ B ^ NOP) == 0)
2912 for (i = 4;
2913 bfd_get_section_contents (abfd, glink, buf,
2914 glink_vma - glink->vma + i, 4);
2915 i += 4)
2916 if (bfd_get_32 (abfd, buf) != NOP)
2917 {
2918 resolv_vma = glink_vma + i;
2919 break;
2920 }
2921 }
2922
2923 count = relplt->size / sizeof (Elf32_External_Rela);
2924 stub_vma = glink_vma - (bfd_vma) count * 16;
2925 /* If the stubs are those for -shared/-pie then we might have
2926 multiple stubs for each plt entry. If that is the case then
2927 there is no way to associate stubs with their plt entries short
2928 of figuring out the GOT pointer value used in the stub. */
2929 if (!is_nonpic_glink_stub (abfd, glink,
2930 glink_vma - GLINK_ENTRY_SIZE - glink->vma))
2931 return 0;
2932
2933 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2934 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2935 return -1;
2936
2937 size = count * sizeof (asymbol);
2938 p = relplt->relocation;
2939 for (i = 0; i < count; i++, p++)
2940 {
2941 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2942 if (p->addend != 0)
2943 size += sizeof ("+0x") - 1 + 8;
2944 }
2945
2946 size += sizeof (asymbol) + sizeof ("__glink");
2947
2948 if (resolv_vma)
2949 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2950
2951 s = *ret = bfd_malloc (size);
2952 if (s == NULL)
2953 return -1;
2954
2955 names = (char *) (s + count + 1 + (resolv_vma != 0));
2956 p = relplt->relocation;
2957 for (i = 0; i < count; i++, p++)
2958 {
2959 size_t len;
2960
2961 *s = **p->sym_ptr_ptr;
2962 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2963 we are defining a symbol, ensure one of them is set. */
2964 if ((s->flags & BSF_LOCAL) == 0)
2965 s->flags |= BSF_GLOBAL;
2966 s->flags |= BSF_SYNTHETIC;
2967 s->section = glink;
2968 s->value = stub_vma - glink->vma;
2969 s->name = names;
2970 s->udata.p = NULL;
2971 len = strlen ((*p->sym_ptr_ptr)->name);
2972 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2973 names += len;
2974 if (p->addend != 0)
2975 {
2976 memcpy (names, "+0x", sizeof ("+0x") - 1);
2977 names += sizeof ("+0x") - 1;
2978 bfd_sprintf_vma (abfd, names, p->addend);
2979 names += strlen (names);
2980 }
2981 memcpy (names, "@plt", sizeof ("@plt"));
2982 names += sizeof ("@plt");
2983 ++s;
2984 stub_vma += 16;
2985 }
2986
2987 /* Add a symbol at the start of the glink branch table. */
2988 memset (s, 0, sizeof *s);
2989 s->the_bfd = abfd;
2990 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2991 s->section = glink;
2992 s->value = glink_vma - glink->vma;
2993 s->name = names;
2994 memcpy (names, "__glink", sizeof ("__glink"));
2995 names += sizeof ("__glink");
2996 s++;
2997 count++;
2998
2999 if (resolv_vma)
3000 {
3001 /* Add a symbol for the glink PLT resolver. */
3002 memset (s, 0, sizeof *s);
3003 s->the_bfd = abfd;
3004 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
3005 s->section = glink;
3006 s->value = resolv_vma - glink->vma;
3007 s->name = names;
3008 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
3009 names += sizeof ("__glink_PLTresolve");
3010 s++;
3011 count++;
3012 }
3013
3014 return count;
3015 }
3016 \f
3017 /* The following functions are specific to the ELF linker, while
3018 functions above are used generally. They appear in this file more
3019 or less in the order in which they are called. eg.
3020 ppc_elf_check_relocs is called early in the link process,
3021 ppc_elf_finish_dynamic_sections is one of the last functions
3022 called. */
3023
3024 /* Track PLT entries needed for a given symbol. We might need more
3025 than one glink entry per symbol when generating a pic binary. */
3026 struct plt_entry
3027 {
3028 struct plt_entry *next;
3029
3030 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
3031 This field stores the offset into .got2 used to initialise the
3032 GOT pointer reg. It will always be at least 32768. (Current
3033 gcc always uses an offset of 32768, but ld -r will pack .got2
3034 sections together resulting in larger offsets). */
3035 bfd_vma addend;
3036
3037 /* The .got2 section. */
3038 asection *sec;
3039
3040 /* PLT refcount or offset. */
3041 union
3042 {
3043 bfd_signed_vma refcount;
3044 bfd_vma offset;
3045 } plt;
3046
3047 /* .glink stub offset. */
3048 bfd_vma glink_offset;
3049 };
3050
3051 /* Of those relocs that might be copied as dynamic relocs, this function
3052 selects those that must be copied when linking a shared library,
3053 even when the symbol is local. */
3054
3055 static int
3056 must_be_dyn_reloc (struct bfd_link_info *info,
3057 enum elf_ppc_reloc_type r_type)
3058 {
3059 switch (r_type)
3060 {
3061 default:
3062 return 1;
3063
3064 case R_PPC_REL24:
3065 case R_PPC_REL14:
3066 case R_PPC_REL14_BRTAKEN:
3067 case R_PPC_REL14_BRNTAKEN:
3068 case R_PPC_REL32:
3069 return 0;
3070
3071 case R_PPC_TPREL32:
3072 case R_PPC_TPREL16:
3073 case R_PPC_TPREL16_LO:
3074 case R_PPC_TPREL16_HI:
3075 case R_PPC_TPREL16_HA:
3076 return !info->executable;
3077 }
3078 }
3079
3080 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
3081 copying dynamic variables from a shared lib into an app's dynbss
3082 section, and instead use a dynamic relocation to point into the
3083 shared lib. */
3084 #define ELIMINATE_COPY_RELOCS 1
3085
3086 /* 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 /* Various options passed from the linker. */
3143 struct ppc_elf_params *params;
3144
3145 /* Short-cuts to get to dynamic linker sections. */
3146 asection *got;
3147 asection *relgot;
3148 asection *glink;
3149 asection *plt;
3150 asection *relplt;
3151 asection *iplt;
3152 asection *reliplt;
3153 asection *dynbss;
3154 asection *relbss;
3155 asection *dynsbss;
3156 asection *relsbss;
3157 elf_linker_section_t sdata[2];
3158 asection *sbss;
3159 asection *glink_eh_frame;
3160
3161 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
3162 asection *srelplt2;
3163
3164 /* The .got.plt section (VxWorks only)*/
3165 asection *sgotplt;
3166
3167 /* Shortcut to __tls_get_addr. */
3168 struct elf_link_hash_entry *tls_get_addr;
3169
3170 /* The bfd that forced an old-style PLT. */
3171 bfd *old_bfd;
3172
3173 /* TLS local dynamic got entry handling. */
3174 union {
3175 bfd_signed_vma refcount;
3176 bfd_vma offset;
3177 } tlsld_got;
3178
3179 /* Offset of branch table to PltResolve function in glink. */
3180 bfd_vma glink_pltresolve;
3181
3182 /* Size of reserved GOT entries. */
3183 unsigned int got_header_size;
3184 /* Non-zero if allocating the header left a gap. */
3185 unsigned int got_gap;
3186
3187 /* The type of PLT we have chosen to use. */
3188 enum ppc_elf_plt_type plt_type;
3189
3190 /* True if the target system is VxWorks. */
3191 unsigned int is_vxworks:1;
3192
3193 /* The size of PLT entries. */
3194 int plt_entry_size;
3195 /* The distance between adjacent PLT slots. */
3196 int plt_slot_size;
3197 /* The size of the first PLT entry. */
3198 int plt_initial_entry_size;
3199
3200 /* Small local sym cache. */
3201 struct sym_cache sym_cache;
3202 };
3203
3204 /* Rename some of the generic section flags to better document how they
3205 are used for ppc32. The flags are only valid for ppc32 elf objects. */
3206
3207 /* Nonzero if this section has TLS related relocations. */
3208 #define has_tls_reloc sec_flg0
3209
3210 /* Nonzero if this section has a call to __tls_get_addr. */
3211 #define has_tls_get_addr_call sec_flg1
3212
3213 /* Get the PPC ELF linker hash table from a link_info structure. */
3214
3215 #define ppc_elf_hash_table(p) \
3216 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
3217 == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
3218
3219 /* Create an entry in a PPC ELF linker hash table. */
3220
3221 static struct bfd_hash_entry *
3222 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
3223 struct bfd_hash_table *table,
3224 const char *string)
3225 {
3226 /* Allocate the structure if it has not already been allocated by a
3227 subclass. */
3228 if (entry == NULL)
3229 {
3230 entry = bfd_hash_allocate (table,
3231 sizeof (struct ppc_elf_link_hash_entry));
3232 if (entry == NULL)
3233 return entry;
3234 }
3235
3236 /* Call the allocation method of the superclass. */
3237 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
3238 if (entry != NULL)
3239 {
3240 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
3241 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
3242 ppc_elf_hash_entry (entry)->tls_mask = 0;
3243 ppc_elf_hash_entry (entry)->has_sda_refs = 0;
3244 }
3245
3246 return entry;
3247 }
3248
3249 /* Create a PPC ELF linker hash table. */
3250
3251 static struct bfd_link_hash_table *
3252 ppc_elf_link_hash_table_create (bfd *abfd)
3253 {
3254 struct ppc_elf_link_hash_table *ret;
3255
3256 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
3257 if (ret == NULL)
3258 return NULL;
3259
3260 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
3261 ppc_elf_link_hash_newfunc,
3262 sizeof (struct ppc_elf_link_hash_entry),
3263 PPC32_ELF_DATA))
3264 {
3265 free (ret);
3266 return NULL;
3267 }
3268
3269 ret->elf.init_plt_refcount.refcount = 0;
3270 ret->elf.init_plt_refcount.glist = NULL;
3271 ret->elf.init_plt_offset.offset = 0;
3272 ret->elf.init_plt_offset.glist = NULL;
3273
3274 ret->sdata[0].name = ".sdata";
3275 ret->sdata[0].sym_name = "_SDA_BASE_";
3276 ret->sdata[0].bss_name = ".sbss";
3277
3278 ret->sdata[1].name = ".sdata2";
3279 ret->sdata[1].sym_name = "_SDA2_BASE_";
3280 ret->sdata[1].bss_name = ".sbss2";
3281
3282 ret->plt_entry_size = 12;
3283 ret->plt_slot_size = 8;
3284 ret->plt_initial_entry_size = 72;
3285
3286 return &ret->elf.root;
3287 }
3288
3289 /* Hook linker params into hash table. */
3290
3291 void
3292 ppc_elf_link_params (struct bfd_link_info *info, struct ppc_elf_params *params)
3293 {
3294 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3295
3296 if (htab)
3297 htab->params = params;
3298 }
3299
3300 /* Create .got and the related sections. */
3301
3302 static bfd_boolean
3303 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
3304 {
3305 struct ppc_elf_link_hash_table *htab;
3306 asection *s;
3307 flagword flags;
3308
3309 if (!_bfd_elf_create_got_section (abfd, info))
3310 return FALSE;
3311
3312 htab = ppc_elf_hash_table (info);
3313 htab->got = s = bfd_get_linker_section (abfd, ".got");
3314 if (s == NULL)
3315 abort ();
3316
3317 if (htab->is_vxworks)
3318 {
3319 htab->sgotplt = bfd_get_linker_section (abfd, ".got.plt");
3320 if (!htab->sgotplt)
3321 abort ();
3322 }
3323 else
3324 {
3325 /* The powerpc .got has a blrl instruction in it. Mark it
3326 executable. */
3327 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
3328 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3329 if (!bfd_set_section_flags (abfd, s, flags))
3330 return FALSE;
3331 }
3332
3333 htab->relgot = bfd_get_linker_section (abfd, ".rela.got");
3334 if (!htab->relgot)
3335 abort ();
3336
3337 return TRUE;
3338 }
3339
3340 static bfd_boolean
3341 ppc_elf_create_glink (bfd *abfd, struct bfd_link_info *info)
3342 {
3343 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3344 asection *s;
3345 flagword flags;
3346
3347 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY | SEC_HAS_CONTENTS
3348 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3349 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags);
3350 htab->glink = s;
3351 if (s == NULL
3352 || !bfd_set_section_alignment (abfd, s,
3353 htab->params->ppc476_workaround ? 6 : 4))
3354 return FALSE;
3355
3356 if (!info->no_ld_generated_unwind_info)
3357 {
3358 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3359 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3360 s = bfd_make_section_anyway_with_flags (abfd, ".eh_frame", flags);
3361 htab->glink_eh_frame = s;
3362 if (s == NULL
3363 || !bfd_set_section_alignment (abfd, s, 2))
3364 return FALSE;
3365 }
3366
3367 flags = SEC_ALLOC | SEC_LINKER_CREATED;
3368 s = bfd_make_section_anyway_with_flags (abfd, ".iplt", flags);
3369 htab->iplt = s;
3370 if (s == NULL
3371 || !bfd_set_section_alignment (abfd, s, 4))
3372 return FALSE;
3373
3374 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3375 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3376 s = bfd_make_section_anyway_with_flags (abfd, ".rela.iplt", flags);
3377 htab->reliplt = s;
3378 if (s == NULL
3379 || ! bfd_set_section_alignment (abfd, s, 2))
3380 return FALSE;
3381 return TRUE;
3382 }
3383
3384 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
3385 to output sections (just like _bfd_elf_create_dynamic_sections has
3386 to create .dynbss and .rela.bss). */
3387
3388 static bfd_boolean
3389 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3390 {
3391 struct ppc_elf_link_hash_table *htab;
3392 asection *s;
3393 flagword flags;
3394
3395 htab = ppc_elf_hash_table (info);
3396
3397 if (htab->got == NULL
3398 && !ppc_elf_create_got (abfd, info))
3399 return FALSE;
3400
3401 if (!_bfd_elf_create_dynamic_sections (abfd, info))
3402 return FALSE;
3403
3404 if (htab->glink == NULL
3405 && !ppc_elf_create_glink (abfd, info))
3406 return FALSE;
3407
3408 htab->dynbss = bfd_get_linker_section (abfd, ".dynbss");
3409 s = bfd_make_section_anyway_with_flags (abfd, ".dynsbss",
3410 SEC_ALLOC | SEC_LINKER_CREATED);
3411 htab->dynsbss = s;
3412 if (s == NULL)
3413 return FALSE;
3414
3415 if (! info->shared)
3416 {
3417 htab->relbss = bfd_get_linker_section (abfd, ".rela.bss");
3418 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
3419 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3420 s = bfd_make_section_anyway_with_flags (abfd, ".rela.sbss", flags);
3421 htab->relsbss = s;
3422 if (s == NULL
3423 || ! bfd_set_section_alignment (abfd, s, 2))
3424 return FALSE;
3425 }
3426
3427 if (htab->is_vxworks
3428 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
3429 return FALSE;
3430
3431 htab->relplt = bfd_get_linker_section (abfd, ".rela.plt");
3432 htab->plt = s = bfd_get_linker_section (abfd, ".plt");
3433 if (s == NULL)
3434 abort ();
3435
3436 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
3437 if (htab->plt_type == PLT_VXWORKS)
3438 /* The VxWorks PLT is a loaded section with contents. */
3439 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3440 return bfd_set_section_flags (abfd, s, flags);
3441 }
3442
3443 /* Copy the extra info we tack onto an elf_link_hash_entry. */
3444
3445 static void
3446 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
3447 struct elf_link_hash_entry *dir,
3448 struct elf_link_hash_entry *ind)
3449 {
3450 struct ppc_elf_link_hash_entry *edir, *eind;
3451
3452 edir = (struct ppc_elf_link_hash_entry *) dir;
3453 eind = (struct ppc_elf_link_hash_entry *) ind;
3454
3455 edir->tls_mask |= eind->tls_mask;
3456 edir->has_sda_refs |= eind->has_sda_refs;
3457
3458 /* If called to transfer flags for a weakdef during processing
3459 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
3460 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
3461 if (!(ELIMINATE_COPY_RELOCS
3462 && eind->elf.root.type != bfd_link_hash_indirect
3463 && edir->elf.dynamic_adjusted))
3464 edir->elf.non_got_ref |= eind->elf.non_got_ref;
3465
3466 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
3467 edir->elf.ref_regular |= eind->elf.ref_regular;
3468 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
3469 edir->elf.needs_plt |= eind->elf.needs_plt;
3470 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
3471
3472 if (eind->dyn_relocs != NULL)
3473 {
3474 if (edir->dyn_relocs != NULL)
3475 {
3476 struct elf_dyn_relocs **pp;
3477 struct elf_dyn_relocs *p;
3478
3479 /* Add reloc counts against the indirect sym to the direct sym
3480 list. Merge any entries against the same section. */
3481 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
3482 {
3483 struct elf_dyn_relocs *q;
3484
3485 for (q = edir->dyn_relocs; q != NULL; q = q->next)
3486 if (q->sec == p->sec)
3487 {
3488 q->pc_count += p->pc_count;
3489 q->count += p->count;
3490 *pp = p->next;
3491 break;
3492 }
3493 if (q == NULL)
3494 pp = &p->next;
3495 }
3496 *pp = edir->dyn_relocs;
3497 }
3498
3499 edir->dyn_relocs = eind->dyn_relocs;
3500 eind->dyn_relocs = NULL;
3501 }
3502
3503 /* If we were called to copy over info for a weak sym, that's all.
3504 You might think dyn_relocs need not be copied over; After all,
3505 both syms will be dynamic or both non-dynamic so we're just
3506 moving reloc accounting around. However, ELIMINATE_COPY_RELOCS
3507 code in ppc_elf_adjust_dynamic_symbol needs to check for
3508 dyn_relocs in read-only sections, and it does so on what is the
3509 DIR sym here. */
3510 if (eind->elf.root.type != bfd_link_hash_indirect)
3511 return;
3512
3513 /* Copy over the GOT refcount entries that we may have already seen to
3514 the symbol which just became indirect. */
3515 edir->elf.got.refcount += eind->elf.got.refcount;
3516 eind->elf.got.refcount = 0;
3517
3518 /* And plt entries. */
3519 if (eind->elf.plt.plist != NULL)
3520 {
3521 if (edir->elf.plt.plist != NULL)
3522 {
3523 struct plt_entry **entp;
3524 struct plt_entry *ent;
3525
3526 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
3527 {
3528 struct plt_entry *dent;
3529
3530 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
3531 if (dent->sec == ent->sec && dent->addend == ent->addend)
3532 {
3533 dent->plt.refcount += ent->plt.refcount;
3534 *entp = ent->next;
3535 break;
3536 }
3537 if (dent == NULL)
3538 entp = &ent->next;
3539 }
3540 *entp = edir->elf.plt.plist;
3541 }
3542
3543 edir->elf.plt.plist = eind->elf.plt.plist;
3544 eind->elf.plt.plist = NULL;
3545 }
3546
3547 if (eind->elf.dynindx != -1)
3548 {
3549 if (edir->elf.dynindx != -1)
3550 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3551 edir->elf.dynstr_index);
3552 edir->elf.dynindx = eind->elf.dynindx;
3553 edir->elf.dynstr_index = eind->elf.dynstr_index;
3554 eind->elf.dynindx = -1;
3555 eind->elf.dynstr_index = 0;
3556 }
3557 }
3558
3559 /* Hook called by the linker routine which adds symbols from an object
3560 file. We use it to put .comm items in .sbss, and not .bss. */
3561
3562 static bfd_boolean
3563 ppc_elf_add_symbol_hook (bfd *abfd,
3564 struct bfd_link_info *info,
3565 Elf_Internal_Sym *sym,
3566 const char **namep ATTRIBUTE_UNUSED,
3567 flagword *flagsp ATTRIBUTE_UNUSED,
3568 asection **secp,
3569 bfd_vma *valp)
3570 {
3571 if (sym->st_shndx == SHN_COMMON
3572 && !info->relocatable
3573 && is_ppc_elf (info->output_bfd)
3574 && sym->st_size <= elf_gp_size (abfd))
3575 {
3576 /* Common symbols less than or equal to -G nn bytes are automatically
3577 put into .sbss. */
3578 struct ppc_elf_link_hash_table *htab;
3579
3580 htab = ppc_elf_hash_table (info);
3581 if (htab->sbss == NULL)
3582 {
3583 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3584
3585 if (!htab->elf.dynobj)
3586 htab->elf.dynobj = abfd;
3587
3588 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3589 ".sbss",
3590 flags);
3591 if (htab->sbss == NULL)
3592 return FALSE;
3593 }
3594
3595 *secp = htab->sbss;
3596 *valp = sym->st_size;
3597 }
3598
3599 if ((abfd->flags & DYNAMIC) == 0
3600 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
3601 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
3602 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
3603
3604 return TRUE;
3605 }
3606 \f
3607 static bfd_boolean
3608 create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
3609 {
3610 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3611
3612 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3613 TRUE, FALSE, TRUE);
3614 if (lsect->sym == NULL)
3615 return FALSE;
3616 if (lsect->sym->root.type == bfd_link_hash_new)
3617 lsect->sym->non_elf = 0;
3618 lsect->sym->ref_regular = 1;
3619 _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
3620 return TRUE;
3621 }
3622
3623 /* Create a special linker section. */
3624
3625 static bfd_boolean
3626 ppc_elf_create_linker_section (bfd *abfd,
3627 struct bfd_link_info *info,
3628 flagword flags,
3629 elf_linker_section_t *lsect)
3630 {
3631 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3632 asection *s;
3633
3634 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3635 | SEC_LINKER_CREATED);
3636
3637 /* Record the first bfd that needs the special sections. */
3638 if (!htab->elf.dynobj)
3639 htab->elf.dynobj = abfd;
3640
3641 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3642 lsect->name,
3643 flags);
3644 if (s == NULL
3645 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3646 return FALSE;
3647 lsect->section = s;
3648
3649 return create_sdata_sym (info, lsect);
3650 }
3651
3652 /* Find a linker generated pointer with a given addend and type. */
3653
3654 static elf_linker_section_pointers_t *
3655 elf_find_pointer_linker_section
3656 (elf_linker_section_pointers_t *linker_pointers,
3657 bfd_vma addend,
3658 elf_linker_section_t *lsect)
3659 {
3660 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3661 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3662 return linker_pointers;
3663
3664 return NULL;
3665 }
3666
3667 /* Allocate a pointer to live in a linker created section. */
3668
3669 static bfd_boolean
3670 elf_create_pointer_linker_section (bfd *abfd,
3671 elf_linker_section_t *lsect,
3672 struct elf_link_hash_entry *h,
3673 const Elf_Internal_Rela *rel)
3674 {
3675 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3676 elf_linker_section_pointers_t *linker_section_ptr;
3677 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3678 bfd_size_type amt;
3679
3680 BFD_ASSERT (lsect != NULL);
3681
3682 /* Is this a global symbol? */
3683 if (h != NULL)
3684 {
3685 struct ppc_elf_link_hash_entry *eh;
3686
3687 /* Has this symbol already been allocated? If so, our work is done. */
3688 eh = (struct ppc_elf_link_hash_entry *) h;
3689 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3690 rel->r_addend,
3691 lsect))
3692 return TRUE;
3693
3694 ptr_linker_section_ptr = &eh->linker_section_pointer;
3695 }
3696 else
3697 {
3698 BFD_ASSERT (is_ppc_elf (abfd));
3699
3700 /* Allocation of a pointer to a local symbol. */
3701 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3702
3703 /* Allocate a table to hold the local symbols if first time. */
3704 if (!ptr)
3705 {
3706 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3707
3708 amt = num_symbols;
3709 amt *= sizeof (elf_linker_section_pointers_t *);
3710 ptr = bfd_zalloc (abfd, amt);
3711
3712 if (!ptr)
3713 return FALSE;
3714
3715 elf_local_ptr_offsets (abfd) = ptr;
3716 }
3717
3718 /* Has this symbol already been allocated? If so, our work is done. */
3719 if (elf_find_pointer_linker_section (ptr[r_symndx],
3720 rel->r_addend,
3721 lsect))
3722 return TRUE;
3723
3724 ptr_linker_section_ptr = &ptr[r_symndx];
3725 }
3726
3727 /* Allocate space for a pointer in the linker section, and allocate
3728 a new pointer record from internal memory. */
3729 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3730 amt = sizeof (elf_linker_section_pointers_t);
3731 linker_section_ptr = bfd_alloc (abfd, amt);
3732
3733 if (!linker_section_ptr)
3734 return FALSE;
3735
3736 linker_section_ptr->next = *ptr_linker_section_ptr;
3737 linker_section_ptr->addend = rel->r_addend;
3738 linker_section_ptr->lsect = lsect;
3739 *ptr_linker_section_ptr = linker_section_ptr;
3740
3741 linker_section_ptr->offset = lsect->section->size;
3742 lsect->section->size += 4;
3743
3744 #ifdef DEBUG
3745 fprintf (stderr,
3746 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3747 lsect->name, (long) linker_section_ptr->offset,
3748 (long) lsect->section->size);
3749 #endif
3750
3751 return TRUE;
3752 }
3753
3754 static struct plt_entry **
3755 update_local_sym_info (bfd *abfd,
3756 Elf_Internal_Shdr *symtab_hdr,
3757 unsigned long r_symndx,
3758 int tls_type)
3759 {
3760 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3761 struct plt_entry **local_plt;
3762 char *local_got_tls_masks;
3763
3764 if (local_got_refcounts == NULL)
3765 {
3766 bfd_size_type size = symtab_hdr->sh_info;
3767
3768 size *= (sizeof (*local_got_refcounts)
3769 + sizeof (*local_plt)
3770 + sizeof (*local_got_tls_masks));
3771 local_got_refcounts = bfd_zalloc (abfd, size);
3772 if (local_got_refcounts == NULL)
3773 return NULL;
3774 elf_local_got_refcounts (abfd) = local_got_refcounts;
3775 }
3776
3777 local_plt = (struct plt_entry **) (local_got_refcounts + symtab_hdr->sh_info);
3778 local_got_tls_masks = (char *) (local_plt + symtab_hdr->sh_info);
3779 local_got_tls_masks[r_symndx] |= tls_type;
3780 if (tls_type != PLT_IFUNC)
3781 local_got_refcounts[r_symndx] += 1;
3782 return local_plt + r_symndx;
3783 }
3784
3785 static bfd_boolean
3786 update_plt_info (bfd *abfd, struct plt_entry **plist,
3787 asection *sec, bfd_vma addend)
3788 {
3789 struct plt_entry *ent;
3790
3791 if (addend < 32768)
3792 sec = NULL;
3793 for (ent = *plist; ent != NULL; ent = ent->next)
3794 if (ent->sec == sec && ent->addend == addend)
3795 break;
3796 if (ent == NULL)
3797 {
3798 bfd_size_type amt = sizeof (*ent);
3799 ent = bfd_alloc (abfd, amt);
3800 if (ent == NULL)
3801 return FALSE;
3802 ent->next = *plist;
3803 ent->sec = sec;
3804 ent->addend = addend;
3805 ent->plt.refcount = 0;
3806 *plist = ent;
3807 }
3808 ent->plt.refcount += 1;
3809 return TRUE;
3810 }
3811
3812 static struct plt_entry *
3813 find_plt_ent (struct plt_entry **plist, asection *sec, bfd_vma addend)
3814 {
3815 struct plt_entry *ent;
3816
3817 if (addend < 32768)
3818 sec = NULL;
3819 for (ent = *plist; ent != NULL; ent = ent->next)
3820 if (ent->sec == sec && ent->addend == addend)
3821 break;
3822 return ent;
3823 }
3824
3825 static bfd_boolean
3826 is_branch_reloc (enum elf_ppc_reloc_type r_type)
3827 {
3828 return (r_type == R_PPC_PLTREL24
3829 || r_type == R_PPC_LOCAL24PC
3830 || r_type == R_PPC_REL24
3831 || r_type == R_PPC_REL14
3832 || r_type == R_PPC_REL14_BRTAKEN
3833 || r_type == R_PPC_REL14_BRNTAKEN
3834 || r_type == R_PPC_ADDR24
3835 || r_type == R_PPC_ADDR14
3836 || r_type == R_PPC_ADDR14_BRTAKEN
3837 || r_type == R_PPC_ADDR14_BRNTAKEN);
3838 }
3839
3840 static void
3841 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3842 {
3843 (*_bfd_error_handler)
3844 (_("%B: relocation %s cannot be used when making a shared object"),
3845 abfd,
3846 ppc_elf_howto_table[r_type]->name);
3847 bfd_set_error (bfd_error_bad_value);
3848 }
3849
3850 /* Look through the relocs for a section during the first phase, and
3851 allocate space in the global offset table or procedure linkage
3852 table. */
3853
3854 static bfd_boolean
3855 ppc_elf_check_relocs (bfd *abfd,
3856 struct bfd_link_info *info,
3857 asection *sec,
3858 const Elf_Internal_Rela *relocs)
3859 {
3860 struct ppc_elf_link_hash_table *htab;
3861 Elf_Internal_Shdr *symtab_hdr;
3862 struct elf_link_hash_entry **sym_hashes;
3863 const Elf_Internal_Rela *rel;
3864 const Elf_Internal_Rela *rel_end;
3865 asection *got2, *sreloc;
3866 struct elf_link_hash_entry *tga;
3867
3868 if (info->relocatable)
3869 return TRUE;
3870
3871 /* Don't do anything special with non-loaded, non-alloced sections.
3872 In particular, any relocs in such sections should not affect GOT
3873 and PLT reference counting (ie. we don't allow them to create GOT
3874 or PLT entries), there's no possibility or desire to optimize TLS
3875 relocs, and there's not much point in propagating relocs to shared
3876 libs that the dynamic linker won't relocate. */
3877 if ((sec->flags & SEC_ALLOC) == 0)
3878 return TRUE;
3879
3880 #ifdef DEBUG
3881 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3882 sec, abfd);
3883 #endif
3884
3885 BFD_ASSERT (is_ppc_elf (abfd));
3886
3887 /* Initialize howto table if not already done. */
3888 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3889 ppc_elf_howto_init ();
3890
3891 htab = ppc_elf_hash_table (info);
3892 if (htab->glink == NULL)
3893 {
3894 if (htab->elf.dynobj == NULL)
3895 htab->elf.dynobj = abfd;
3896 if (!ppc_elf_create_glink (htab->elf.dynobj, info))
3897 return FALSE;
3898 }
3899 tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3900 FALSE, FALSE, TRUE);
3901 symtab_hdr = &elf_symtab_hdr (abfd);
3902 sym_hashes = elf_sym_hashes (abfd);
3903 got2 = bfd_get_section_by_name (abfd, ".got2");
3904 sreloc = NULL;
3905
3906 rel_end = relocs + sec->reloc_count;
3907 for (rel = relocs; rel < rel_end; rel++)
3908 {
3909 unsigned long r_symndx;
3910 enum elf_ppc_reloc_type r_type;
3911 struct elf_link_hash_entry *h;
3912 int tls_type;
3913
3914 r_symndx = ELF32_R_SYM (rel->r_info);
3915 if (r_symndx < symtab_hdr->sh_info)
3916 h = NULL;
3917 else
3918 {
3919 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3920 while (h->root.type == bfd_link_hash_indirect
3921 || h->root.type == bfd_link_hash_warning)
3922 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3923
3924 /* PR15323, ref flags aren't set for references in the same
3925 object. */
3926 h->root.non_ir_ref = 1;
3927 }
3928
3929 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3930 This shows up in particular in an R_PPC_ADDR32 in the eabi
3931 startup code. */
3932 if (h != NULL
3933 && htab->got == NULL
3934 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3935 {
3936 if (htab->elf.dynobj == NULL)
3937 htab->elf.dynobj = abfd;
3938 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3939 return FALSE;
3940 BFD_ASSERT (h == htab->elf.hgot);
3941 }
3942
3943 tls_type = 0;
3944 r_type = ELF32_R_TYPE (rel->r_info);
3945 if (h == NULL && !htab->is_vxworks)
3946 {
3947 Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3948 abfd, r_symndx);
3949 if (isym == NULL)
3950 return FALSE;
3951
3952 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3953 {
3954 struct plt_entry **ifunc;
3955
3956 /* Set PLT_IFUNC flag for this sym, no GOT entry yet. */
3957 ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
3958 PLT_IFUNC);
3959 if (ifunc == NULL)
3960 return FALSE;
3961
3962 /* STT_GNU_IFUNC symbols must have a PLT entry;
3963 In a non-pie executable even when there are
3964 no plt calls. */
3965 if (!info->shared
3966 || is_branch_reloc (r_type))
3967 {
3968 bfd_vma addend = 0;
3969 if (r_type == R_PPC_PLTREL24)
3970 {
3971 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3972 if (info->shared)
3973 addend = rel->r_addend;
3974 }
3975 if (!update_plt_info (abfd, ifunc, got2, addend))
3976 return FALSE;
3977 }
3978 }
3979 }
3980
3981 if (!htab->is_vxworks
3982 && is_branch_reloc (r_type)
3983 && h != NULL
3984 && h == tga)
3985 {
3986 if (rel != relocs
3987 && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
3988 || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
3989 /* We have a new-style __tls_get_addr call with a marker
3990 reloc. */
3991 ;
3992 else
3993 /* Mark this section as having an old-style call. */
3994 sec->has_tls_get_addr_call = 1;
3995 }
3996
3997 switch (r_type)
3998 {
3999 case R_PPC_TLSGD:
4000 case R_PPC_TLSLD:
4001 /* These special tls relocs tie a call to __tls_get_addr with
4002 its parameter symbol. */
4003 break;
4004
4005 case R_PPC_GOT_TLSLD16:
4006 case R_PPC_GOT_TLSLD16_LO:
4007 case R_PPC_GOT_TLSLD16_HI:
4008 case R_PPC_GOT_TLSLD16_HA:
4009 tls_type = TLS_TLS | TLS_LD;
4010 goto dogottls;
4011
4012 case R_PPC_GOT_TLSGD16:
4013 case R_PPC_GOT_TLSGD16_LO:
4014 case R_PPC_GOT_TLSGD16_HI:
4015 case R_PPC_GOT_TLSGD16_HA:
4016 tls_type = TLS_TLS | TLS_GD;
4017 goto dogottls;
4018
4019 case R_PPC_GOT_TPREL16:
4020 case R_PPC_GOT_TPREL16_LO:
4021 case R_PPC_GOT_TPREL16_HI:
4022 case R_PPC_GOT_TPREL16_HA:
4023 if (!info->executable)
4024 info->flags |= DF_STATIC_TLS;
4025 tls_type = TLS_TLS | TLS_TPREL;
4026 goto dogottls;
4027
4028 case R_PPC_GOT_DTPREL16:
4029 case R_PPC_GOT_DTPREL16_LO:
4030 case R_PPC_GOT_DTPREL16_HI:
4031 case R_PPC_GOT_DTPREL16_HA:
4032 tls_type = TLS_TLS | TLS_DTPREL;
4033 dogottls:
4034 sec->has_tls_reloc = 1;
4035 /* Fall thru */
4036
4037 /* GOT16 relocations */
4038 case R_PPC_GOT16:
4039 case R_PPC_GOT16_LO:
4040 case R_PPC_GOT16_HI:
4041 case R_PPC_GOT16_HA:
4042 /* This symbol requires a global offset table entry. */
4043 if (htab->got == NULL)
4044 {
4045 if (htab->elf.dynobj == NULL)
4046 htab->elf.dynobj = abfd;
4047 if (!ppc_elf_create_got (htab->elf.dynobj, info))
4048 return FALSE;
4049 }
4050 if (h != NULL)
4051 {
4052 h->got.refcount += 1;
4053 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
4054 }
4055 else
4056 /* This is a global offset table entry for a local symbol. */
4057 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
4058 return FALSE;
4059
4060 /* We may also need a plt entry if the symbol turns out to be
4061 an ifunc. */
4062 if (h != NULL && !info->shared)
4063 {
4064 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4065 return FALSE;
4066 }
4067 break;
4068
4069 /* Indirect .sdata relocation. */
4070 case R_PPC_EMB_SDAI16:
4071 if (info->shared)
4072 {
4073 bad_shared_reloc (abfd, r_type);
4074 return FALSE;
4075 }
4076 if (htab->sdata[0].section == NULL
4077 && !ppc_elf_create_linker_section (abfd, info, 0,
4078 &htab->sdata[0]))
4079 return FALSE;
4080 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
4081 h, rel))
4082 return FALSE;
4083 if (h != NULL)
4084 {
4085 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4086 h->non_got_ref = TRUE;
4087 }
4088 break;
4089
4090 /* Indirect .sdata2 relocation. */
4091 case R_PPC_EMB_SDA2I16:
4092 if (info->shared)
4093 {
4094 bad_shared_reloc (abfd, r_type);
4095 return FALSE;
4096 }
4097 if (htab->sdata[1].section == NULL
4098 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
4099 &htab->sdata[1]))
4100 return FALSE;
4101 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
4102 h, rel))
4103 return FALSE;
4104 if (h != NULL)
4105 {
4106 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4107 h->non_got_ref = TRUE;
4108 }
4109 break;
4110
4111 case R_PPC_VLE_SDAREL_LO16A:
4112 case R_PPC_VLE_SDAREL_LO16D:
4113 case R_PPC_VLE_SDAREL_HI16A:
4114 case R_PPC_VLE_SDAREL_HI16D:
4115 case R_PPC_VLE_SDAREL_HA16A:
4116 case R_PPC_VLE_SDAREL_HA16D:
4117 case R_PPC_SDAREL16:
4118 if (htab->sdata[0].sym == NULL
4119 && !create_sdata_sym (info, &htab->sdata[0]))
4120 return FALSE;
4121
4122 if (htab->sdata[1].sym == NULL
4123 && !create_sdata_sym (info, &htab->sdata[1]))
4124 return FALSE;
4125
4126 if (h != NULL)
4127 {
4128 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4129 h->non_got_ref = TRUE;
4130 }
4131 break;
4132
4133 case R_PPC_VLE_REL8:
4134 case R_PPC_VLE_REL15:
4135 case R_PPC_VLE_REL24:
4136 case R_PPC_VLE_LO16A:
4137 case R_PPC_VLE_LO16D:
4138 case R_PPC_VLE_HI16A:
4139 case R_PPC_VLE_HI16D:
4140 case R_PPC_VLE_HA16A:
4141 case R_PPC_VLE_HA16D:
4142 break;
4143
4144 case R_PPC_EMB_SDA2REL:
4145 if (info->shared)
4146 {
4147 bad_shared_reloc (abfd, r_type);
4148 return FALSE;
4149 }
4150 if (htab->sdata[1].sym == NULL
4151 && !create_sdata_sym (info, &htab->sdata[1]))
4152 return FALSE;
4153 if (h != NULL)
4154 {
4155 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4156 h->non_got_ref = TRUE;
4157 }
4158 break;
4159
4160 case R_PPC_VLE_SDA21_LO:
4161 case R_PPC_VLE_SDA21:
4162 case R_PPC_EMB_SDA21:
4163 case R_PPC_EMB_RELSDA:
4164 if (info->shared)
4165 {
4166 bad_shared_reloc (abfd, r_type);
4167 return FALSE;
4168 }
4169 if (htab->sdata[0].sym == NULL
4170 && !create_sdata_sym (info, &htab->sdata[0]))
4171 return FALSE;
4172 if (htab->sdata[1].sym == NULL
4173 && !create_sdata_sym (info, &htab->sdata[1]))
4174 return FALSE;
4175 if (h != NULL)
4176 {
4177 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
4178 h->non_got_ref = TRUE;
4179 }
4180 break;
4181
4182 case R_PPC_EMB_NADDR32:
4183 case R_PPC_EMB_NADDR16:
4184 case R_PPC_EMB_NADDR16_LO:
4185 case R_PPC_EMB_NADDR16_HI:
4186 case R_PPC_EMB_NADDR16_HA:
4187 if (info->shared)
4188 {
4189 bad_shared_reloc (abfd, r_type);
4190 return FALSE;
4191 }
4192 if (h != NULL)
4193 h->non_got_ref = TRUE;
4194 break;
4195
4196 case R_PPC_PLTREL24:
4197 if (h == NULL)
4198 break;
4199 /* Fall through */
4200 case R_PPC_PLT32:
4201 case R_PPC_PLTREL32:
4202 case R_PPC_PLT16_LO:
4203 case R_PPC_PLT16_HI:
4204 case R_PPC_PLT16_HA:
4205 #ifdef DEBUG
4206 fprintf (stderr, "Reloc requires a PLT entry\n");
4207 #endif
4208 /* This symbol requires a procedure linkage table entry. We
4209 actually build the entry in finish_dynamic_symbol,
4210 because this might be a case of linking PIC code without
4211 linking in any dynamic objects, in which case we don't
4212 need to generate a procedure linkage table after all. */
4213
4214 if (h == NULL)
4215 {
4216 /* It does not make sense to have a procedure linkage
4217 table entry for a local symbol. */
4218 info->callbacks->einfo (_("%P: %H: %s reloc against local symbol\n"),
4219 abfd, sec, rel->r_offset,
4220 ppc_elf_howto_table[r_type]->name);
4221 bfd_set_error (bfd_error_bad_value);
4222 return FALSE;
4223 }
4224 else
4225 {
4226 bfd_vma addend = 0;
4227
4228 if (r_type == R_PPC_PLTREL24)
4229 {
4230 ppc_elf_tdata (abfd)->makes_plt_call = 1;
4231 if (info->shared)
4232 addend = rel->r_addend;
4233 }
4234 h->needs_plt = 1;
4235 if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
4236 return FALSE;
4237 }
4238 break;
4239
4240 /* The following relocations don't need to propagate the
4241 relocation if linking a shared object since they are
4242 section relative. */
4243 case R_PPC_SECTOFF:
4244 case R_PPC_SECTOFF_LO:
4245 case R_PPC_SECTOFF_HI:
4246 case R_PPC_SECTOFF_HA:
4247 case R_PPC_DTPREL16:
4248 case R_PPC_DTPREL16_LO:
4249 case R_PPC_DTPREL16_HI:
4250 case R_PPC_DTPREL16_HA:
4251 case R_PPC_TOC16:
4252 break;
4253
4254 case R_PPC_REL16:
4255 case R_PPC_REL16_LO:
4256 case R_PPC_REL16_HI:
4257 case R_PPC_REL16_HA:
4258 ppc_elf_tdata (abfd)->has_rel16 = 1;
4259 break;
4260
4261 /* These are just markers. */
4262 case R_PPC_TLS:
4263 case R_PPC_EMB_MRKREF:
4264 case R_PPC_NONE:
4265 case R_PPC_max:
4266 case R_PPC_RELAX:
4267 case R_PPC_RELAX_PLT:
4268 case R_PPC_RELAX_PLTREL24:
4269 break;
4270
4271 /* These should only appear in dynamic objects. */
4272 case R_PPC_COPY:
4273 case R_PPC_GLOB_DAT:
4274 case R_PPC_JMP_SLOT:
4275 case R_PPC_RELATIVE:
4276 case R_PPC_IRELATIVE:
4277 break;
4278
4279 /* These aren't handled yet. We'll report an error later. */
4280 case R_PPC_ADDR30:
4281 case R_PPC_EMB_RELSEC16:
4282 case R_PPC_EMB_RELST_LO:
4283 case R_PPC_EMB_RELST_HI:
4284 case R_PPC_EMB_RELST_HA:
4285 case R_PPC_EMB_BIT_FLD:
4286 break;
4287
4288 /* This refers only to functions defined in the shared library. */
4289 case R_PPC_LOCAL24PC:
4290 if (h != NULL && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
4291 {
4292 htab->plt_type = PLT_OLD;
4293 htab->old_bfd = abfd;
4294 }
4295 if (h != NULL && h->type == STT_GNU_IFUNC)
4296 {
4297 if (info->shared)
4298 {
4299 info->callbacks->einfo (_("%P: %H: @local call to ifunc %s\n"),
4300 abfd, sec, rel->r_offset,
4301 h->root.root.string);
4302 bfd_set_error (bfd_error_bad_value);
4303 return FALSE;
4304 }
4305 h->needs_plt = 1;
4306 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4307 return FALSE;
4308 }
4309 break;
4310
4311 /* This relocation describes the C++ object vtable hierarchy.
4312 Reconstruct it for later use during GC. */
4313 case R_PPC_GNU_VTINHERIT:
4314 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4315 return FALSE;
4316 break;
4317
4318 /* This relocation describes which C++ vtable entries are actually
4319 used. Record for later use during GC. */
4320 case R_PPC_GNU_VTENTRY:
4321 BFD_ASSERT (h != NULL);
4322 if (h != NULL
4323 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4324 return FALSE;
4325 break;
4326
4327 /* We shouldn't really be seeing these. */
4328 case R_PPC_TPREL32:
4329 case R_PPC_TPREL16:
4330 case R_PPC_TPREL16_LO:
4331 case R_PPC_TPREL16_HI:
4332 case R_PPC_TPREL16_HA:
4333 if (!info->executable)
4334 info->flags |= DF_STATIC_TLS;
4335 goto dodyn;
4336
4337 /* Nor these. */
4338 case R_PPC_DTPMOD32:
4339 case R_PPC_DTPREL32:
4340 goto dodyn;
4341
4342 case R_PPC_REL32:
4343 if (h == NULL
4344 && got2 != NULL
4345 && (sec->flags & SEC_CODE) != 0
4346 && info->shared
4347 && htab->plt_type == PLT_UNSET)
4348 {
4349 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
4350 the start of a function, which assembles to a REL32
4351 reference to .got2. If we detect one of these, then
4352 force the old PLT layout because the linker cannot
4353 reliably deduce the GOT pointer value needed for
4354 PLT call stubs. */
4355 asection *s;
4356 Elf_Internal_Sym *isym;
4357
4358 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4359 abfd, r_symndx);
4360 if (isym == NULL)
4361 return FALSE;
4362
4363 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4364 if (s == got2)
4365 {
4366 htab->plt_type = PLT_OLD;
4367 htab->old_bfd = abfd;
4368 }
4369 }
4370 if (h == NULL || h == htab->elf.hgot)
4371 break;
4372 /* fall through */
4373
4374 case R_PPC_ADDR32:
4375 case R_PPC_ADDR16:
4376 case R_PPC_ADDR16_LO:
4377 case R_PPC_ADDR16_HI:
4378 case R_PPC_ADDR16_HA:
4379 case R_PPC_UADDR32:
4380 case R_PPC_UADDR16:
4381 if (h != NULL && !info->shared)
4382 {
4383 /* We may need a plt entry if the symbol turns out to be
4384 a function defined in a dynamic object. */
4385 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4386 return FALSE;
4387
4388 /* We may need a copy reloc too. */
4389 h->non_got_ref = 1;
4390 h->pointer_equality_needed = 1;
4391 }
4392 goto dodyn;
4393
4394 case R_PPC_REL24:
4395 case R_PPC_REL14:
4396 case R_PPC_REL14_BRTAKEN:
4397 case R_PPC_REL14_BRNTAKEN:
4398 if (h == NULL)
4399 break;
4400 if (h == htab->elf.hgot)
4401 {
4402 if (htab->plt_type == PLT_UNSET)
4403 {
4404 htab->plt_type = PLT_OLD;
4405 htab->old_bfd = abfd;
4406 }
4407 break;
4408 }
4409 /* fall through */
4410
4411 case R_PPC_ADDR24:
4412 case R_PPC_ADDR14:
4413 case R_PPC_ADDR14_BRTAKEN:
4414 case R_PPC_ADDR14_BRNTAKEN:
4415 if (h != NULL && !info->shared)
4416 {
4417 /* We may need a plt entry if the symbol turns out to be
4418 a function defined in a dynamic object. */
4419 h->needs_plt = 1;
4420 if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
4421 return FALSE;
4422 break;
4423 }
4424
4425 dodyn:
4426 /* If we are creating a shared library, and this is a reloc
4427 against a global symbol, or a non PC relative reloc
4428 against a local symbol, then we need to copy the reloc
4429 into the shared library. However, if we are linking with
4430 -Bsymbolic, we do not need to copy a reloc against a
4431 global symbol which is defined in an object we are
4432 including in the link (i.e., DEF_REGULAR is set). At
4433 this point we have not seen all the input files, so it is
4434 possible that DEF_REGULAR is not set now but will be set
4435 later (it is never cleared). In case of a weak definition,
4436 DEF_REGULAR may be cleared later by a strong definition in
4437 a shared library. We account for that possibility below by
4438 storing information in the dyn_relocs field of the hash
4439 table entry. A similar situation occurs when creating
4440 shared libraries and symbol visibility changes render the
4441 symbol local.
4442
4443 If on the other hand, we are creating an executable, we
4444 may need to keep relocations for symbols satisfied by a
4445 dynamic library if we manage to avoid copy relocs for the
4446 symbol. */
4447 if ((info->shared
4448 && (must_be_dyn_reloc (info, r_type)
4449 || (h != NULL
4450 && (!SYMBOLIC_BIND (info, h)
4451 || h->root.type == bfd_link_hash_defweak
4452 || !h->def_regular))))
4453 || (ELIMINATE_COPY_RELOCS
4454 && !info->shared
4455 && h != NULL
4456 && (h->root.type == bfd_link_hash_defweak
4457 || !h->def_regular)))
4458 {
4459 #ifdef DEBUG
4460 fprintf (stderr,
4461 "ppc_elf_check_relocs needs to "
4462 "create relocation for %s\n",
4463 (h && h->root.root.string
4464 ? h->root.root.string : "<unknown>"));
4465 #endif
4466 if (sreloc == NULL)
4467 {
4468 if (htab->elf.dynobj == NULL)
4469 htab->elf.dynobj = abfd;
4470
4471 sreloc = _bfd_elf_make_dynamic_reloc_section
4472 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
4473
4474 if (sreloc == NULL)
4475 return FALSE;
4476 }
4477
4478 /* If this is a global symbol, we count the number of
4479 relocations we need for this symbol. */
4480 if (h != NULL)
4481 {
4482 struct elf_dyn_relocs *p;
4483 struct elf_dyn_relocs **rel_head;
4484
4485 rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
4486 p = *rel_head;
4487 if (p == NULL || p->sec != sec)
4488 {
4489 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4490 if (p == NULL)
4491 return FALSE;
4492 p->next = *rel_head;
4493 *rel_head = p;
4494 p->sec = sec;
4495 p->count = 0;
4496 p->pc_count = 0;
4497 }
4498 p->count += 1;
4499 if (!must_be_dyn_reloc (info, r_type))
4500 p->pc_count += 1;
4501 }
4502 else
4503 {
4504 /* Track dynamic relocs needed for local syms too.
4505 We really need local syms available to do this
4506 easily. Oh well. */
4507 struct ppc_dyn_relocs *p;
4508 struct ppc_dyn_relocs **rel_head;
4509 bfd_boolean is_ifunc;
4510 asection *s;
4511 void *vpp;
4512 Elf_Internal_Sym *isym;
4513
4514 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4515 abfd, r_symndx);
4516 if (isym == NULL)
4517 return FALSE;
4518
4519 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
4520 if (s == NULL)
4521 s = sec;
4522
4523 vpp = &elf_section_data (s)->local_dynrel;
4524 rel_head = (struct ppc_dyn_relocs **) vpp;
4525 is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC;
4526 p = *rel_head;
4527 if (p != NULL && p->sec == sec && p->ifunc != is_ifunc)
4528 p = p->next;
4529 if (p == NULL || p->sec != sec || p->ifunc != is_ifunc)
4530 {
4531 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
4532 if (p == NULL)
4533 return FALSE;
4534 p->next = *rel_head;
4535 *rel_head = p;
4536 p->sec = sec;
4537 p->ifunc = is_ifunc;
4538 p->count = 0;
4539 }
4540 p->count += 1;
4541 }
4542 }
4543
4544 break;
4545 }
4546 }
4547
4548 return TRUE;
4549 }
4550 \f
4551
4552 /* Merge object attributes from IBFD into OBFD. Raise an error if
4553 there are conflicting attributes. */
4554 static bfd_boolean
4555 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
4556 {
4557 obj_attribute *in_attr, *in_attrs;
4558 obj_attribute *out_attr, *out_attrs;
4559
4560 if (!elf_known_obj_attributes_proc (obfd)[0].i)
4561 {
4562 /* This is the first object. Copy the attributes. */
4563 _bfd_elf_copy_obj_attributes (ibfd, obfd);
4564
4565 /* Use the Tag_null value to indicate the attributes have been
4566 initialized. */
4567 elf_known_obj_attributes_proc (obfd)[0].i = 1;
4568
4569 return TRUE;
4570 }
4571
4572 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
4573 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
4574
4575 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
4576 non-conflicting ones. */
4577 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
4578 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
4579 if (in_attr->i != out_attr->i)
4580 {
4581 out_attr->type = 1;
4582 if (out_attr->i == 0)
4583 out_attr->i = in_attr->i;
4584 else if (in_attr->i == 0)
4585 ;
4586 else if (out_attr->i == 1 && in_attr->i == 2)
4587 _bfd_error_handler
4588 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
4589 else if (out_attr->i == 1 && in_attr->i == 3)
4590 _bfd_error_handler
4591 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4592 obfd, ibfd);
4593 else if (out_attr->i == 3 && in_attr->i == 1)
4594 _bfd_error_handler
4595 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
4596 ibfd, obfd);
4597 else if (out_attr->i == 3 && in_attr->i == 2)
4598 _bfd_error_handler
4599 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
4600 ibfd, obfd);
4601 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
4602 _bfd_error_handler
4603 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
4604 else if (in_attr->i > 3)
4605 _bfd_error_handler
4606 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
4607 in_attr->i);
4608 else
4609 _bfd_error_handler
4610 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
4611 out_attr->i);
4612 }
4613
4614 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
4615 merge non-conflicting ones. */
4616 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
4617 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
4618 if (in_attr->i != out_attr->i)
4619 {
4620 const char *in_abi = NULL, *out_abi = NULL;
4621
4622 switch (in_attr->i)
4623 {
4624 case 1: in_abi = "generic"; break;
4625 case 2: in_abi = "AltiVec"; break;
4626 case 3: in_abi = "SPE"; break;
4627 }
4628
4629 switch (out_attr->i)
4630 {
4631 case 1: out_abi = "generic"; break;
4632 case 2: out_abi = "AltiVec"; break;
4633 case 3: out_abi = "SPE"; break;
4634 }
4635
4636 out_attr->type = 1;
4637 if (out_attr->i == 0)
4638 out_attr->i = in_attr->i;
4639 else if (in_attr->i == 0)
4640 ;
4641 /* For now, allow generic to transition to AltiVec or SPE
4642 without a warning. If GCC marked files with their stack
4643 alignment and used don't-care markings for files which are
4644 not affected by the vector ABI, we could warn about this
4645 case too. */
4646 else if (out_attr->i == 1)
4647 out_attr->i = in_attr->i;
4648 else if (in_attr->i == 1)
4649 ;
4650 else if (in_abi == NULL)
4651 _bfd_error_handler
4652 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
4653 in_attr->i);
4654 else if (out_abi == NULL)
4655 _bfd_error_handler
4656 (_("Warning: %B uses unknown vector ABI %d"), obfd,
4657 in_attr->i);
4658 else
4659 _bfd_error_handler
4660 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
4661 ibfd, obfd, in_abi, out_abi);
4662 }
4663
4664 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
4665 and merge non-conflicting ones. */
4666 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
4667 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
4668 if (in_attr->i != out_attr->i)
4669 {
4670 out_attr->type = 1;
4671 if (out_attr->i == 0)
4672 out_attr->i = in_attr->i;
4673 else if (in_attr->i == 0)
4674 ;
4675 else if (out_attr->i == 1 && in_attr->i == 2)
4676 _bfd_error_handler
4677 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
4678 else if (out_attr->i == 2 && in_attr->i == 1)
4679 _bfd_error_handler
4680 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
4681 else if (in_attr->i > 2)
4682 _bfd_error_handler
4683 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
4684 in_attr->i);
4685 else
4686 _bfd_error_handler
4687 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
4688 out_attr->i);
4689 }
4690
4691 /* Merge Tag_compatibility attributes and any common GNU ones. */
4692 _bfd_elf_merge_object_attributes (ibfd, obfd);
4693
4694 return TRUE;
4695 }
4696
4697 /* Merge backend specific data from an object file to the output
4698 object file when linking. */
4699
4700 static bfd_boolean
4701 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4702 {
4703 flagword old_flags;
4704 flagword new_flags;
4705 bfd_boolean error;
4706
4707 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4708 return TRUE;
4709
4710 /* Check if we have the same endianness. */
4711 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4712 return FALSE;
4713
4714 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4715 return FALSE;
4716
4717 new_flags = elf_elfheader (ibfd)->e_flags;
4718 old_flags = elf_elfheader (obfd)->e_flags;
4719 if (!elf_flags_init (obfd))
4720 {
4721 /* First call, no flags set. */
4722 elf_flags_init (obfd) = TRUE;
4723 elf_elfheader (obfd)->e_flags = new_flags;
4724 }
4725
4726 /* Compatible flags are ok. */
4727 else if (new_flags == old_flags)
4728 ;
4729
4730 /* Incompatible flags. */
4731 else
4732 {
4733 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4734 to be linked with either. */
4735 error = FALSE;
4736 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4737 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4738 {
4739 error = TRUE;
4740 (*_bfd_error_handler)
4741 (_("%B: compiled with -mrelocatable and linked with "
4742 "modules compiled normally"), ibfd);
4743 }
4744 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4745 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4746 {
4747 error = TRUE;
4748 (*_bfd_error_handler)
4749 (_("%B: compiled normally and linked with "
4750 "modules compiled with -mrelocatable"), ibfd);
4751 }
4752
4753 /* The output is -mrelocatable-lib iff both the input files are. */
4754 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4755 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4756
4757 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4758 but each input file is either -mrelocatable or -mrelocatable-lib. */
4759 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4760 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4761 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4762 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4763
4764 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4765 any module uses it. */
4766 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4767
4768 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4769 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4770
4771 /* Warn about any other mismatches. */
4772 if (new_flags != old_flags)
4773 {
4774 error = TRUE;
4775 (*_bfd_error_handler)
4776 (_("%B: uses different e_flags (0x%lx) fields "
4777 "than previous modules (0x%lx)"),
4778 ibfd, (long) new_flags, (long) old_flags);
4779 }
4780
4781 if (error)
4782 {
4783 bfd_set_error (bfd_error_bad_value);
4784 return FALSE;
4785 }
4786 }
4787
4788 return TRUE;
4789 }
4790
4791 static void
4792 ppc_elf_vle_split16 (bfd *output_bfd, bfd_byte *contents,
4793 bfd_vma offset, bfd_vma relocation,
4794 split16_format_type split16_format)
4795
4796 {
4797 bfd_vma insn, top5, bottom11;
4798
4799 insn = bfd_get_32 (output_bfd, contents + offset);
4800 top5 = relocation >> 11;
4801 top5 = top5 << (split16_format == split16a_type ? 20 : 16);
4802 bottom11 = relocation & 0x7ff;
4803 insn |= top5;
4804 insn |= bottom11;
4805 bfd_put_32 (output_bfd, insn, contents + offset);
4806 }
4807
4808 \f
4809 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4810 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4811 int
4812 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4813 struct bfd_link_info *info)
4814 {
4815 struct ppc_elf_link_hash_table *htab;
4816 flagword flags;
4817
4818 htab = ppc_elf_hash_table (info);
4819
4820 if (htab->plt_type == PLT_UNSET)
4821 {
4822 struct elf_link_hash_entry *h;
4823
4824 if (htab->params->plt_style == PLT_OLD)
4825 htab->plt_type = PLT_OLD;
4826 else if (info->shared
4827 && htab->elf.dynamic_sections_created
4828 && (h = elf_link_hash_lookup (&htab->elf, "_mcount",
4829 FALSE, FALSE, TRUE)) != NULL
4830 && (h->type == STT_FUNC
4831 || h->needs_plt)
4832 && h->ref_regular
4833 && !(SYMBOL_CALLS_LOCAL (info, h)
4834 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4835 && h->root.type == bfd_link_hash_undefweak)))
4836 {
4837 /* Profiling of shared libs (and pies) is not supported with
4838 secure plt, because ppc32 does profiling before a
4839 function prologue and a secure plt pic call stubs needs
4840 r30 to be set up. */
4841 htab->plt_type = PLT_OLD;
4842 }
4843 else
4844 {
4845 bfd *ibfd;
4846 enum ppc_elf_plt_type plt_type = htab->params->plt_style;
4847
4848 /* Look through the reloc flags left by ppc_elf_check_relocs.
4849 Use the old style bss plt if a file makes plt calls
4850 without using the new relocs, and if ld isn't given
4851 --secure-plt and we never see REL16 relocs. */
4852 if (plt_type == PLT_UNSET)
4853 plt_type = PLT_OLD;
4854 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4855 if (is_ppc_elf (ibfd))
4856 {
4857 if (ppc_elf_tdata (ibfd)->has_rel16)
4858 plt_type = PLT_NEW;
4859 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4860 {
4861 plt_type = PLT_OLD;
4862 htab->old_bfd = ibfd;
4863 break;
4864 }
4865 }
4866 htab->plt_type = plt_type;
4867 }
4868 }
4869 if (htab->plt_type == PLT_OLD && htab->params->plt_style == PLT_NEW)
4870 {
4871 if (htab->old_bfd != NULL)
4872 info->callbacks->einfo (_("%P: bss-plt forced due to %B\n"),
4873 htab->old_bfd);
4874 else
4875 info->callbacks->einfo (_("%P: bss-plt forced by profiling\n"));
4876 }
4877
4878 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4879
4880 if (htab->plt_type == PLT_NEW)
4881 {
4882 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4883 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4884
4885 /* The new PLT is a loaded section. */
4886 if (htab->plt != NULL
4887 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4888 return -1;
4889
4890 /* The new GOT is not executable. */
4891 if (htab->got != NULL
4892 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4893 return -1;
4894 }
4895 else
4896 {
4897 /* Stop an unused .glink section from affecting .text alignment. */
4898 if (htab->glink != NULL
4899 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4900 return -1;
4901 }
4902 return htab->plt_type == PLT_NEW;
4903 }
4904 \f
4905 /* Return the section that should be marked against GC for a given
4906 relocation. */
4907
4908 static asection *
4909 ppc_elf_gc_mark_hook (asection *sec,
4910 struct bfd_link_info *info,
4911 Elf_Internal_Rela *rel,
4912 struct elf_link_hash_entry *h,
4913 Elf_Internal_Sym *sym)
4914 {
4915 if (h != NULL)
4916 switch (ELF32_R_TYPE (rel->r_info))
4917 {
4918 case R_PPC_GNU_VTINHERIT:
4919 case R_PPC_GNU_VTENTRY:
4920 return NULL;
4921 }
4922
4923 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4924 }
4925
4926 /* Update the got, plt and dynamic reloc reference counts for the
4927 section being removed. */
4928
4929 static bfd_boolean
4930 ppc_elf_gc_sweep_hook (bfd *abfd,
4931 struct bfd_link_info *info,
4932 asection *sec,
4933 const Elf_Internal_Rela *relocs)
4934 {
4935 struct ppc_elf_link_hash_table *htab;
4936 Elf_Internal_Shdr *symtab_hdr;
4937 struct elf_link_hash_entry **sym_hashes;
4938 bfd_signed_vma *local_got_refcounts;
4939 const Elf_Internal_Rela *rel, *relend;
4940 asection *got2;
4941
4942 if (info->relocatable)
4943 return TRUE;
4944
4945 if ((sec->flags & SEC_ALLOC) == 0)
4946 return TRUE;
4947
4948 elf_section_data (sec)->local_dynrel = NULL;
4949
4950 htab = ppc_elf_hash_table (info);
4951 symtab_hdr = &elf_symtab_hdr (abfd);
4952 sym_hashes = elf_sym_hashes (abfd);
4953 local_got_refcounts = elf_local_got_refcounts (abfd);
4954 got2 = bfd_get_section_by_name (abfd, ".got2");
4955
4956 relend = relocs + sec->reloc_count;
4957 for (rel = relocs; rel < relend; rel++)
4958 {
4959 unsigned long r_symndx;
4960 enum elf_ppc_reloc_type r_type;
4961 struct elf_link_hash_entry *h = NULL;
4962
4963 r_symndx = ELF32_R_SYM (rel->r_info);
4964 if (r_symndx >= symtab_hdr->sh_info)
4965 {
4966 struct elf_dyn_relocs **pp, *p;
4967 struct ppc_elf_link_hash_entry *eh;
4968
4969 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4970 while (h->root.type == bfd_link_hash_indirect
4971 || h->root.type == bfd_link_hash_warning)
4972 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4973 eh = (struct ppc_elf_link_hash_entry *) h;
4974
4975 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4976 if (p->sec == sec)
4977 {
4978 /* Everything must go for SEC. */
4979 *pp = p->next;
4980 break;
4981 }
4982 }
4983
4984 r_type = ELF32_R_TYPE (rel->r_info);
4985 if (!htab->is_vxworks
4986 && h == NULL
4987 && local_got_refcounts != NULL
4988 && (!info->shared
4989 || is_branch_reloc (r_type)))
4990 {
4991 struct plt_entry **local_plt = (struct plt_entry **)
4992 (local_got_refcounts + symtab_hdr->sh_info);
4993 char *local_got_tls_masks = (char *)
4994 (local_plt + symtab_hdr->sh_info);
4995 if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
4996 {
4997 struct plt_entry **ifunc = local_plt + r_symndx;
4998 bfd_vma addend = 0;
4999 struct plt_entry *ent;
5000
5001 if (r_type == R_PPC_PLTREL24 && info->shared)
5002 addend = rel->r_addend;
5003 ent = find_plt_ent (ifunc, got2, addend);
5004 if (ent->plt.refcount > 0)
5005 ent->plt.refcount -= 1;
5006 continue;
5007 }
5008 }
5009
5010 switch (r_type)
5011 {
5012 case R_PPC_GOT_TLSLD16:
5013 case R_PPC_GOT_TLSLD16_LO:
5014 case R_PPC_GOT_TLSLD16_HI:
5015 case R_PPC_GOT_TLSLD16_HA:
5016 case R_PPC_GOT_TLSGD16:
5017 case R_PPC_GOT_TLSGD16_LO:
5018 case R_PPC_GOT_TLSGD16_HI:
5019 case R_PPC_GOT_TLSGD16_HA:
5020 case R_PPC_GOT_TPREL16:
5021 case R_PPC_GOT_TPREL16_LO:
5022 case R_PPC_GOT_TPREL16_HI:
5023 case R_PPC_GOT_TPREL16_HA:
5024 case R_PPC_GOT_DTPREL16:
5025 case R_PPC_GOT_DTPREL16_LO:
5026 case R_PPC_GOT_DTPREL16_HI:
5027 case R_PPC_GOT_DTPREL16_HA:
5028 case R_PPC_GOT16:
5029 case R_PPC_GOT16_LO:
5030 case R_PPC_GOT16_HI:
5031 case R_PPC_GOT16_HA:
5032 if (h != NULL)
5033 {
5034 if (h->got.refcount > 0)
5035 h->got.refcount--;
5036 if (!info->shared)
5037 {
5038 struct plt_entry *ent;
5039
5040 ent = find_plt_ent (&h->plt.plist, NULL, 0);
5041 if (ent != NULL && ent->plt.refcount > 0)
5042 ent->plt.refcount -= 1;
5043 }
5044 }
5045 else if (local_got_refcounts != NULL)
5046 {
5047 if (local_got_refcounts[r_symndx] > 0)
5048 local_got_refcounts[r_symndx]--;
5049 }
5050 break;
5051
5052 case R_PPC_REL24:
5053 case R_PPC_REL14:
5054 case R_PPC_REL14_BRTAKEN:
5055 case R_PPC_REL14_BRNTAKEN:
5056 case R_PPC_REL32:
5057 if (h == NULL || h == htab->elf.hgot)
5058 break;
5059 /* Fall thru */
5060
5061 case R_PPC_ADDR32:
5062 case R_PPC_ADDR24:
5063 case R_PPC_ADDR16:
5064 case R_PPC_ADDR16_LO:
5065 case R_PPC_ADDR16_HI:
5066 case R_PPC_ADDR16_HA:
5067 case R_PPC_ADDR14:
5068 case R_PPC_ADDR14_BRTAKEN:
5069 case R_PPC_ADDR14_BRNTAKEN:
5070 case R_PPC_UADDR32:
5071 case R_PPC_UADDR16:
5072 if (info->shared)
5073 break;
5074
5075 case R_PPC_PLT32:
5076 case R_PPC_PLTREL24:
5077 case R_PPC_PLTREL32:
5078 case R_PPC_PLT16_LO:
5079 case R_PPC_PLT16_HI:
5080 case R_PPC_PLT16_HA:
5081 if (h != NULL)
5082 {
5083 bfd_vma addend = 0;
5084 struct plt_entry *ent;
5085
5086 if (r_type == R_PPC_PLTREL24 && info->shared)
5087 addend = rel->r_addend;
5088 ent = find_plt_ent (&h->plt.plist, got2, addend);
5089 if (ent != NULL && ent->plt.refcount > 0)
5090 ent->plt.refcount -= 1;
5091 }
5092 break;
5093
5094 default:
5095 break;
5096 }
5097 }
5098 return TRUE;
5099 }
5100 \f
5101 /* Set plt output section type, htab->tls_get_addr, and call the
5102 generic ELF tls_setup function. */
5103
5104 asection *
5105 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
5106 {
5107 struct ppc_elf_link_hash_table *htab;
5108
5109 htab = ppc_elf_hash_table (info);
5110 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
5111 FALSE, FALSE, TRUE);
5112 if (!htab->params->no_tls_get_addr_opt)
5113 {
5114 struct elf_link_hash_entry *opt, *tga;
5115 opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
5116 FALSE, FALSE, TRUE);
5117 if (opt != NULL
5118 && (opt->root.type == bfd_link_hash_defined
5119 || opt->root.type == bfd_link_hash_defweak))
5120 {
5121 /* If glibc supports an optimized __tls_get_addr call stub,
5122 signalled by the presence of __tls_get_addr_opt, and we'll
5123 be calling __tls_get_addr via a plt call stub, then
5124 make __tls_get_addr point to __tls_get_addr_opt. */
5125 tga = htab->tls_get_addr;
5126 if (htab->elf.dynamic_sections_created
5127 && tga != NULL
5128 && (tga->type == STT_FUNC
5129 || tga->needs_plt)
5130 && !(SYMBOL_CALLS_LOCAL (info, tga)
5131 || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
5132 && tga->root.type == bfd_link_hash_undefweak)))
5133 {
5134 struct plt_entry *ent;
5135 for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
5136 if (ent->plt.refcount > 0)
5137 break;
5138 if (ent != NULL)
5139 {
5140 tga->root.type = bfd_link_hash_indirect;
5141 tga->root.u.i.link = &opt->root;
5142 ppc_elf_copy_indirect_symbol (info, opt, tga);
5143 if (opt->dynindx != -1)
5144 {
5145 /* Use __tls_get_addr_opt in dynamic relocations. */
5146 opt->dynindx = -1;
5147 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
5148 opt->dynstr_index);
5149 if (!bfd_elf_link_record_dynamic_symbol (info, opt))
5150 return FALSE;
5151 }
5152 htab->tls_get_addr = opt;
5153 }
5154 }
5155 }
5156 else
5157 htab->params->no_tls_get_addr_opt = TRUE;
5158 }
5159 if (htab->plt_type == PLT_NEW
5160 && htab->plt != NULL
5161 && htab->plt->output_section != NULL)
5162 {
5163 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
5164 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
5165 }
5166
5167 return _bfd_elf_tls_setup (obfd, info);
5168 }
5169
5170 /* Return TRUE iff REL is a branch reloc with a global symbol matching
5171 HASH. */
5172
5173 static bfd_boolean
5174 branch_reloc_hash_match (const bfd *ibfd,
5175 const Elf_Internal_Rela *rel,
5176 const struct elf_link_hash_entry *hash)
5177 {
5178 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5179 enum elf_ppc_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
5180 unsigned int r_symndx = ELF32_R_SYM (rel->r_info);
5181
5182 if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type))
5183 {
5184 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
5185 struct elf_link_hash_entry *h;
5186
5187 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5188 while (h->root.type == bfd_link_hash_indirect
5189 || h->root.type == bfd_link_hash_warning)
5190 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5191 if (h == hash)
5192 return TRUE;
5193 }
5194 return FALSE;
5195 }
5196
5197 /* Run through all the TLS relocs looking for optimization
5198 opportunities. */
5199
5200 bfd_boolean
5201 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
5202 struct bfd_link_info *info)
5203 {
5204 bfd *ibfd;
5205 asection *sec;
5206 struct ppc_elf_link_hash_table *htab;
5207 int pass;
5208
5209 if (info->relocatable || !info->executable)
5210 return TRUE;
5211
5212 htab = ppc_elf_hash_table (info);
5213 if (htab == NULL)
5214 return FALSE;
5215
5216 /* Make two passes through the relocs. First time check that tls
5217 relocs involved in setting up a tls_get_addr call are indeed
5218 followed by such a call. If they are not, don't do any tls
5219 optimization. On the second pass twiddle tls_mask flags to
5220 notify relocate_section that optimization can be done, and
5221 adjust got and plt refcounts. */
5222 for (pass = 0; pass < 2; ++pass)
5223 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5224 {
5225 Elf_Internal_Sym *locsyms = NULL;
5226 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
5227 asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
5228
5229 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5230 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
5231 {
5232 Elf_Internal_Rela *relstart, *rel, *relend;
5233 int expecting_tls_get_addr = 0;
5234
5235 /* Read the relocations. */
5236 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
5237 info->keep_memory);
5238 if (relstart == NULL)
5239 return FALSE;
5240
5241 relend = relstart + sec->reloc_count;
5242 for (rel = relstart; rel < relend; rel++)
5243 {
5244 enum elf_ppc_reloc_type r_type;
5245 unsigned long r_symndx;
5246 struct elf_link_hash_entry *h = NULL;
5247 char *tls_mask;
5248 char tls_set, tls_clear;
5249 bfd_boolean is_local;
5250 bfd_signed_vma *got_count;
5251
5252 r_symndx = ELF32_R_SYM (rel->r_info);
5253 if (r_symndx >= symtab_hdr->sh_info)
5254 {
5255 struct elf_link_hash_entry **sym_hashes;
5256
5257 sym_hashes = elf_sym_hashes (ibfd);
5258 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5259 while (h->root.type == bfd_link_hash_indirect
5260 || h->root.type == bfd_link_hash_warning)
5261 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5262 }
5263
5264 is_local = FALSE;
5265 if (h == NULL
5266 || !h->def_dynamic)
5267 is_local = TRUE;
5268
5269 r_type = ELF32_R_TYPE (rel->r_info);
5270 /* If this section has old-style __tls_get_addr calls
5271 without marker relocs, then check that each
5272 __tls_get_addr call reloc is preceded by a reloc
5273 that conceivably belongs to the __tls_get_addr arg
5274 setup insn. If we don't find matching arg setup
5275 relocs, don't do any tls optimization. */
5276 if (pass == 0
5277 && sec->has_tls_get_addr_call
5278 && h != NULL
5279 && h == htab->tls_get_addr
5280 && !expecting_tls_get_addr
5281 && is_branch_reloc (r_type))
5282 {
5283 info->callbacks->minfo ("%H __tls_get_addr lost arg, "
5284 "TLS optimization disabled\n",
5285 ibfd, sec, rel->r_offset);
5286 if (elf_section_data (sec)->relocs != relstart)
5287 free (relstart);
5288 return TRUE;
5289 }
5290
5291 expecting_tls_get_addr = 0;
5292 switch (r_type)
5293 {
5294 case R_PPC_GOT_TLSLD16:
5295 case R_PPC_GOT_TLSLD16_LO:
5296 expecting_tls_get_addr = 1;
5297 /* Fall thru */
5298
5299 case R_PPC_GOT_TLSLD16_HI:
5300 case R_PPC_GOT_TLSLD16_HA:
5301 /* These relocs should never be against a symbol
5302 defined in a shared lib. Leave them alone if
5303 that turns out to be the case. */
5304 if (!is_local)
5305 continue;
5306
5307 /* LD -> LE */
5308 tls_set = 0;
5309 tls_clear = TLS_LD;
5310 break;
5311
5312 case R_PPC_GOT_TLSGD16:
5313 case R_PPC_GOT_TLSGD16_LO:
5314 expecting_tls_get_addr = 1;
5315 /* Fall thru */
5316
5317 case R_PPC_GOT_TLSGD16_HI:
5318 case R_PPC_GOT_TLSGD16_HA:
5319 if (is_local)
5320 /* GD -> LE */
5321 tls_set = 0;
5322 else
5323 /* GD -> IE */
5324 tls_set = TLS_TLS | TLS_TPRELGD;
5325 tls_clear = TLS_GD;
5326 break;
5327
5328 case R_PPC_GOT_TPREL16:
5329 case R_PPC_GOT_TPREL16_LO:
5330 case R_PPC_GOT_TPREL16_HI:
5331 case R_PPC_GOT_TPREL16_HA:
5332 if (is_local)
5333 {
5334 /* IE -> LE */
5335 tls_set = 0;
5336 tls_clear = TLS_TPREL;
5337 break;
5338 }
5339 else
5340 continue;
5341
5342 case R_PPC_TLSGD:
5343 case R_PPC_TLSLD:
5344 expecting_tls_get_addr = 2;
5345 tls_set = 0;
5346 tls_clear = 0;
5347 break;
5348
5349 default:
5350 continue;
5351 }
5352
5353 if (pass == 0)
5354 {
5355 if (!expecting_tls_get_addr
5356 || (expecting_tls_get_addr == 1
5357 && !sec->has_tls_get_addr_call))
5358 continue;
5359
5360 if (rel + 1 < relend
5361 && branch_reloc_hash_match (ibfd, rel + 1,
5362 htab->tls_get_addr))
5363 continue;
5364
5365 /* Uh oh, we didn't find the expected call. We
5366 could just mark this symbol to exclude it
5367 from tls optimization but it's safer to skip
5368 the entire optimization. */
5369 info->callbacks->minfo (_("%H arg lost __tls_get_addr, "
5370 "TLS optimization disabled\n"),
5371 ibfd, sec, rel->r_offset);
5372 if (elf_section_data (sec)->relocs != relstart)
5373 free (relstart);
5374 return TRUE;
5375 }
5376
5377 if (expecting_tls_get_addr)
5378 {
5379 struct plt_entry *ent;
5380 bfd_vma addend = 0;
5381
5382 if (info->shared
5383 && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
5384 addend = rel[1].r_addend;
5385 ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
5386 got2, addend);
5387 if (ent != NULL && ent->plt.refcount > 0)
5388 ent->plt.refcount -= 1;
5389
5390 if (expecting_tls_get_addr == 2)
5391 continue;
5392 }
5393
5394 if (h != NULL)
5395 {
5396 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
5397 got_count = &h->got.refcount;
5398 }
5399 else
5400 {
5401 bfd_signed_vma *lgot_refs;
5402 struct plt_entry **local_plt;
5403 char *lgot_masks;
5404
5405 if (locsyms == NULL)
5406 {
5407 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
5408 if (locsyms == NULL)
5409 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
5410 symtab_hdr->sh_info,
5411 0, NULL, NULL, NULL);
5412 if (locsyms == NULL)
5413 {
5414 if (elf_section_data (sec)->relocs != relstart)
5415 free (relstart);
5416 return FALSE;
5417 }
5418 }
5419 lgot_refs = elf_local_got_refcounts (ibfd);
5420 if (lgot_refs == NULL)
5421 abort ();
5422 local_plt = (struct plt_entry **)
5423 (lgot_refs + symtab_hdr->sh_info);
5424 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
5425 tls_mask = &lgot_masks[r_symndx];
5426 got_count = &lgot_refs[r_symndx];
5427 }
5428
5429 if (tls_set == 0)
5430 {
5431 /* We managed to get rid of a got entry. */
5432 if (*got_count > 0)
5433 *got_count -= 1;
5434 }
5435
5436 *tls_mask |= tls_set;
5437 *tls_mask &= ~tls_clear;
5438 }
5439
5440 if (elf_section_data (sec)->relocs != relstart)
5441 free (relstart);
5442 }
5443
5444 if (locsyms != NULL
5445 && (symtab_hdr->contents != (unsigned char *) locsyms))
5446 {
5447 if (!info->keep_memory)
5448 free (locsyms);
5449 else
5450 symtab_hdr->contents = (unsigned char *) locsyms;
5451 }
5452 }
5453 return TRUE;
5454 }
5455 \f
5456 /* Return true if we have dynamic relocs that apply to read-only sections. */
5457
5458 static bfd_boolean
5459 readonly_dynrelocs (struct elf_link_hash_entry *h)
5460 {
5461 struct elf_dyn_relocs *p;
5462
5463 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
5464 {
5465 asection *s = p->sec->output_section;
5466
5467 if (s != NULL
5468 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
5469 == (SEC_READONLY | SEC_ALLOC)))
5470 return TRUE;
5471 }
5472 return FALSE;
5473 }
5474
5475 /* Adjust a symbol defined by a dynamic object and referenced by a
5476 regular object. The current definition is in some section of the
5477 dynamic object, but we're not including those sections. We have to
5478 change the definition to something the rest of the link can
5479 understand. */
5480
5481 static bfd_boolean
5482 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
5483 struct elf_link_hash_entry *h)
5484 {
5485 struct ppc_elf_link_hash_table *htab;
5486 asection *s;
5487
5488 #ifdef DEBUG
5489 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
5490 h->root.root.string);
5491 #endif
5492
5493 /* Make sure we know what is going on here. */
5494 htab = ppc_elf_hash_table (info);
5495 BFD_ASSERT (htab->elf.dynobj != NULL
5496 && (h->needs_plt
5497 || h->type == STT_GNU_IFUNC
5498 || h->u.weakdef != NULL
5499 || (h->def_dynamic
5500 && h->ref_regular
5501 && !h->def_regular)));
5502
5503 /* Deal with function syms. */
5504 if (h->type == STT_FUNC
5505 || h->type == STT_GNU_IFUNC
5506 || h->needs_plt)
5507 {
5508 /* Clear procedure linkage table information for any symbol that
5509 won't need a .plt entry. */
5510 struct plt_entry *ent;
5511 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5512 if (ent->plt.refcount > 0)
5513 break;
5514 if (ent == NULL
5515 || (h->type != STT_GNU_IFUNC
5516 && (SYMBOL_CALLS_LOCAL (info, h)
5517 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5518 && h->root.type == bfd_link_hash_undefweak))))
5519 {
5520 /* A PLT entry is not required/allowed when:
5521
5522 1. We are not using ld.so; because then the PLT entry
5523 can't be set up, so we can't use one. In this case,
5524 ppc_elf_adjust_dynamic_symbol won't even be called.
5525
5526 2. GC has rendered the entry unused.
5527
5528 3. We know for certain that a call to this symbol
5529 will go to this object, or will remain undefined. */
5530 h->plt.plist = NULL;
5531 h->needs_plt = 0;
5532 }
5533 else
5534 {
5535 /* After adjust_dynamic_symbol, non_got_ref set in the
5536 non-shared case means that we have allocated space in
5537 .dynbss for the symbol and thus dyn_relocs for this
5538 symbol should be discarded.
5539 If we get here we know we are making a PLT entry for this
5540 symbol, and in an executable we'd normally resolve
5541 relocations against this symbol to the PLT entry. Allow
5542 dynamic relocs if the reference is weak, and the dynamic
5543 relocs will not cause text relocation. */
5544 if (!h->ref_regular_nonweak
5545 && h->non_got_ref
5546 && h->type != STT_GNU_IFUNC
5547 && !htab->is_vxworks
5548 && !ppc_elf_hash_entry (h)->has_sda_refs
5549 && !readonly_dynrelocs (h))
5550 h->non_got_ref = 0;
5551 }
5552 return TRUE;
5553 }
5554 else
5555 h->plt.plist = NULL;
5556
5557 /* If this is a weak symbol, and there is a real definition, the
5558 processor independent code will have arranged for us to see the
5559 real definition first, and we can just use the same value. */
5560 if (h->u.weakdef != NULL)
5561 {
5562 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5563 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5564 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5565 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5566 if (ELIMINATE_COPY_RELOCS)
5567 h->non_got_ref = h->u.weakdef->non_got_ref;
5568 return TRUE;
5569 }
5570
5571 /* This is a reference to a symbol defined by a dynamic object which
5572 is not a function. */
5573
5574 /* If we are creating a shared library, we must presume that the
5575 only references to the symbol are via the global offset table.
5576 For such cases we need not do anything here; the relocations will
5577 be handled correctly by relocate_section. */
5578 if (info->shared)
5579 return TRUE;
5580
5581 /* If there are no references to this symbol that do not use the
5582 GOT, we don't need to generate a copy reloc. */
5583 if (!h->non_got_ref)
5584 return TRUE;
5585
5586 /* If we didn't find any dynamic relocs in read-only sections, then
5587 we'll be keeping the dynamic relocs and avoiding the copy reloc.
5588 We can't do this if there are any small data relocations. This
5589 doesn't work on VxWorks, where we can not have dynamic
5590 relocations (other than copy and jump slot relocations) in an
5591 executable. */
5592 if (ELIMINATE_COPY_RELOCS
5593 && !ppc_elf_hash_entry (h)->has_sda_refs
5594 && !htab->is_vxworks
5595 && !h->def_regular
5596 && !readonly_dynrelocs (h))
5597 {
5598 h->non_got_ref = 0;
5599 return TRUE;
5600 }
5601
5602 /* We must allocate the symbol in our .dynbss section, which will
5603 become part of the .bss section of the executable. There will be
5604 an entry for this symbol in the .dynsym section. The dynamic
5605 object will contain position independent code, so all references
5606 from the dynamic object to this symbol will go through the global
5607 offset table. The dynamic linker will use the .dynsym entry to
5608 determine the address it must put in the global offset table, so
5609 both the dynamic object and the regular object will refer to the
5610 same memory location for the variable.
5611
5612 Of course, if the symbol is referenced using SDAREL relocs, we
5613 must instead allocate it in .sbss. */
5614
5615 if (ppc_elf_hash_entry (h)->has_sda_refs)
5616 s = htab->dynsbss;
5617 else
5618 s = htab->dynbss;
5619 BFD_ASSERT (s != NULL);
5620
5621 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
5622 copy the initial value out of the dynamic object and into the
5623 runtime process image. We need to remember the offset into the
5624 .rela.bss section we are going to use. */
5625 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5626 {
5627 asection *srel;
5628
5629 if (ppc_elf_hash_entry (h)->has_sda_refs)
5630 srel = htab->relsbss;
5631 else
5632 srel = htab->relbss;
5633 BFD_ASSERT (srel != NULL);
5634 srel->size += sizeof (Elf32_External_Rela);
5635 h->needs_copy = 1;
5636 }
5637
5638 return _bfd_elf_adjust_dynamic_copy (h, s);
5639 }
5640 \f
5641 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
5642 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
5643 specifying the addend on the plt relocation. For -fpic code, the sym
5644 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
5645 xxxxxxxx.got2.plt_pic32.<callee>. */
5646
5647 static bfd_boolean
5648 add_stub_sym (struct plt_entry *ent,
5649 struct elf_link_hash_entry *h,
5650 struct bfd_link_info *info)
5651 {
5652 struct elf_link_hash_entry *sh;
5653 size_t len1, len2, len3;
5654 char *name;
5655 const char *stub;
5656 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
5657
5658 if (info->shared)
5659 stub = ".plt_pic32.";
5660 else
5661 stub = ".plt_call32.";
5662
5663 len1 = strlen (h->root.root.string);
5664 len2 = strlen (stub);
5665 len3 = 0;
5666 if (ent->sec)
5667 len3 = strlen (ent->sec->name);
5668 name = bfd_malloc (len1 + len2 + len3 + 9);
5669 if (name == NULL)
5670 return FALSE;
5671 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
5672 if (ent->sec)
5673 memcpy (name + 8, ent->sec->name, len3);
5674 memcpy (name + 8 + len3, stub, len2);
5675 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
5676 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
5677 if (sh == NULL)
5678 return FALSE;
5679 if (sh->root.type == bfd_link_hash_new)
5680 {
5681 sh->root.type = bfd_link_hash_defined;
5682 sh->root.u.def.section = htab->glink;
5683 sh->root.u.def.value = ent->glink_offset;
5684 sh->ref_regular = 1;
5685 sh->def_regular = 1;
5686 sh->ref_regular_nonweak = 1;
5687 sh->forced_local = 1;
5688 sh->non_elf = 0;
5689 }
5690 return TRUE;
5691 }
5692
5693 /* Allocate NEED contiguous space in .got, and return the offset.
5694 Handles allocation of the got header when crossing 32k. */
5695
5696 static bfd_vma
5697 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
5698 {
5699 bfd_vma where;
5700 unsigned int max_before_header;
5701
5702 if (htab->plt_type == PLT_VXWORKS)
5703 {
5704 where = htab->got->size;
5705 htab->got->size += need;
5706 }
5707 else
5708 {
5709 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
5710 if (need <= htab->got_gap)
5711 {
5712 where = max_before_header - htab->got_gap;
5713 htab->got_gap -= need;
5714 }
5715 else
5716 {
5717 if (htab->got->size + need > max_before_header
5718 && htab->got->size <= max_before_header)
5719 {
5720 htab->got_gap = max_before_header - htab->got->size;
5721 htab->got->size = max_before_header + htab->got_header_size;
5722 }
5723 where = htab->got->size;
5724 htab->got->size += need;
5725 }
5726 }
5727 return where;
5728 }
5729
5730 /* Allocate space in associated reloc sections for dynamic relocs. */
5731
5732 static bfd_boolean
5733 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5734 {
5735 struct bfd_link_info *info = inf;
5736 struct ppc_elf_link_hash_entry *eh;
5737 struct ppc_elf_link_hash_table *htab;
5738 struct elf_dyn_relocs *p;
5739
5740 if (h->root.type == bfd_link_hash_indirect)
5741 return TRUE;
5742
5743 htab = ppc_elf_hash_table (info);
5744 if (htab->elf.dynamic_sections_created
5745 || h->type == STT_GNU_IFUNC)
5746 {
5747 struct plt_entry *ent;
5748 bfd_boolean doneone = FALSE;
5749 bfd_vma plt_offset = 0, glink_offset = 0;
5750 bfd_boolean dyn;
5751
5752 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
5753 if (ent->plt.refcount > 0)
5754 {
5755 /* Make sure this symbol is output as a dynamic symbol. */
5756 if (h->dynindx == -1
5757 && !h->forced_local
5758 && !h->def_regular
5759 && htab->elf.dynamic_sections_created)
5760 {
5761 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5762 return FALSE;
5763 }
5764
5765 dyn = htab->elf.dynamic_sections_created;
5766 if (info->shared
5767 || h->type == STT_GNU_IFUNC
5768 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))
5769 {
5770 asection *s = htab->plt;
5771 if (!dyn || h->dynindx == -1)
5772 s = htab->iplt;
5773
5774 if (htab->plt_type == PLT_NEW || !dyn || h->dynindx == -1)
5775 {
5776 if (!doneone)
5777 {
5778 plt_offset = s->size;
5779 s->size += 4;
5780 }
5781 ent->plt.offset = plt_offset;
5782
5783 s = htab->glink;
5784 if (!doneone || info->shared)
5785 {
5786 glink_offset = s->size;
5787 s->size += GLINK_ENTRY_SIZE;
5788 if (h == htab->tls_get_addr
5789 && !htab->params->no_tls_get_addr_opt)
5790 s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
5791 }
5792 if (!doneone
5793 && !info->shared
5794 && h->def_dynamic
5795 && !h->def_regular)
5796 {
5797 h->root.u.def.section = s;
5798 h->root.u.def.value = glink_offset;
5799 }
5800 ent->glink_offset = glink_offset;
5801
5802 if (htab->params->emit_stub_syms
5803 && !add_stub_sym (ent, h, info))
5804 return FALSE;
5805 }
5806 else
5807 {
5808 if (!doneone)
5809 {
5810 /* If this is the first .plt entry, make room
5811 for the special first entry. */
5812 if (s->size == 0)
5813 s->size += htab->plt_initial_entry_size;
5814
5815 /* The PowerPC PLT is actually composed of two
5816 parts, the first part is 2 words (for a load
5817 and a jump), and then there is a remaining
5818 word available at the end. */
5819 plt_offset = (htab->plt_initial_entry_size
5820 + (htab->plt_slot_size
5821 * ((s->size
5822 - htab->plt_initial_entry_size)
5823 / htab->plt_entry_size)));
5824
5825 /* If this symbol is not defined in a regular
5826 file, and we are not generating a shared
5827 library, then set the symbol to this location
5828 in the .plt. This is to avoid text
5829 relocations, and is required to make
5830 function pointers compare as equal between
5831 the normal executable and the shared library. */
5832 if (! info->shared
5833 && h->def_dynamic
5834 && !h->def_regular)
5835 {
5836 h->root.u.def.section = s;
5837 h->root.u.def.value = plt_offset;
5838 }
5839
5840 /* Make room for this entry. */
5841 s->size += htab->plt_entry_size;
5842 /* After the 8192nd entry, room for two entries
5843 is allocated. */
5844 if (htab->plt_type == PLT_OLD
5845 && (s->size - htab->plt_initial_entry_size)
5846 / htab->plt_entry_size
5847 > PLT_NUM_SINGLE_ENTRIES)
5848 s->size += htab->plt_entry_size;
5849 }
5850 ent->plt.offset = plt_offset;
5851 }
5852
5853 /* We also need to make an entry in the .rela.plt section. */
5854 if (!doneone)
5855 {
5856 if (!htab->elf.dynamic_sections_created
5857 || h->dynindx == -1)
5858 htab->reliplt->size += sizeof (Elf32_External_Rela);
5859 else
5860 {
5861 htab->relplt->size += sizeof (Elf32_External_Rela);
5862
5863 if (htab->plt_type == PLT_VXWORKS)
5864 {
5865 /* Allocate space for the unloaded relocations. */
5866 if (!info->shared
5867 && htab->elf.dynamic_sections_created)
5868 {
5869 if (ent->plt.offset
5870 == (bfd_vma) htab->plt_initial_entry_size)
5871 {
5872 htab->srelplt2->size
5873 += (sizeof (Elf32_External_Rela)
5874 * VXWORKS_PLTRESOLVE_RELOCS);
5875 }
5876
5877 htab->srelplt2->size
5878 += (sizeof (Elf32_External_Rela)
5879 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS);
5880 }
5881
5882 /* Every PLT entry has an associated GOT entry in
5883 .got.plt. */
5884 htab->sgotplt->size += 4;
5885 }
5886 }
5887 doneone = TRUE;
5888 }
5889 }
5890 else
5891 ent->plt.offset = (bfd_vma) -1;
5892 }
5893 else
5894 ent->plt.offset = (bfd_vma) -1;
5895
5896 if (!doneone)
5897 {
5898 h->plt.plist = NULL;
5899 h->needs_plt = 0;
5900 }
5901 }
5902 else
5903 {
5904 h->plt.plist = NULL;
5905 h->needs_plt = 0;
5906 }
5907
5908 eh = (struct ppc_elf_link_hash_entry *) h;
5909 if (eh->elf.got.refcount > 0)
5910 {
5911 bfd_boolean dyn;
5912 unsigned int need;
5913
5914 /* Make sure this symbol is output as a dynamic symbol. */
5915 if (eh->elf.dynindx == -1
5916 && !eh->elf.forced_local
5917 && eh->elf.type != STT_GNU_IFUNC
5918 && htab->elf.dynamic_sections_created)
5919 {
5920 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5921 return FALSE;
5922 }
5923
5924 need = 0;
5925 if ((eh->tls_mask & TLS_TLS) != 0)
5926 {
5927 if ((eh->tls_mask & TLS_LD) != 0)
5928 {
5929 if (!eh->elf.def_dynamic)
5930 /* We'll just use htab->tlsld_got.offset. This should
5931 always be the case. It's a little odd if we have
5932 a local dynamic reloc against a non-local symbol. */
5933 htab->tlsld_got.refcount += 1;
5934 else
5935 need += 8;
5936 }
5937 if ((eh->tls_mask & TLS_GD) != 0)
5938 need += 8;
5939 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5940 need += 4;
5941 if ((eh->tls_mask & TLS_DTPREL) != 0)
5942 need += 4;
5943 }
5944 else
5945 need += 4;
5946 if (need == 0)
5947 eh->elf.got.offset = (bfd_vma) -1;
5948 else
5949 {
5950 eh->elf.got.offset = allocate_got (htab, need);
5951 dyn = htab->elf.dynamic_sections_created;
5952 if ((info->shared
5953 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5954 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5955 || eh->elf.root.type != bfd_link_hash_undefweak))
5956 {
5957 asection *rsec = htab->relgot;
5958
5959 if (eh->elf.type == STT_GNU_IFUNC)
5960 rsec = htab->reliplt;
5961 /* All the entries we allocated need relocs.
5962 Except LD only needs one. */
5963 if ((eh->tls_mask & TLS_LD) != 0
5964 && eh->elf.def_dynamic)
5965 need -= 4;
5966 rsec->size += need * (sizeof (Elf32_External_Rela) / 4);
5967 }
5968 }
5969 }
5970 else
5971 eh->elf.got.offset = (bfd_vma) -1;
5972
5973 if (eh->dyn_relocs == NULL
5974 || !htab->elf.dynamic_sections_created)
5975 return TRUE;
5976
5977 /* In the shared -Bsymbolic case, discard space allocated for
5978 dynamic pc-relative relocs against symbols which turn out to be
5979 defined in regular objects. For the normal shared case, discard
5980 space for relocs that have become local due to symbol visibility
5981 changes. */
5982
5983 if (info->shared)
5984 {
5985 /* Relocs that use pc_count are those that appear on a call insn,
5986 or certain REL relocs (see must_be_dyn_reloc) that can be
5987 generated via assembly. We want calls to protected symbols to
5988 resolve directly to the function rather than going via the plt.
5989 If people want function pointer comparisons to work as expected
5990 then they should avoid writing weird assembly. */
5991 if (SYMBOL_CALLS_LOCAL (info, h))
5992 {
5993 struct elf_dyn_relocs **pp;
5994
5995 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5996 {
5997 p->count -= p->pc_count;
5998 p->pc_count = 0;
5999 if (p->count == 0)
6000 *pp = p->next;
6001 else
6002 pp = &p->next;
6003 }
6004 }
6005
6006 if (htab->is_vxworks)
6007 {
6008 struct elf_dyn_relocs **pp;
6009
6010 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
6011 {
6012 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
6013 *pp = p->next;
6014 else
6015 pp = &p->next;
6016 }
6017 }
6018
6019 /* Discard relocs on undefined symbols that must be local. */
6020 if (eh->dyn_relocs != NULL
6021 && h->root.type == bfd_link_hash_undefined
6022 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6023 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6024 eh->dyn_relocs = NULL;
6025
6026 /* Also discard relocs on undefined weak syms with non-default
6027 visibility. */
6028 if (eh->dyn_relocs != NULL
6029 && h->root.type == bfd_link_hash_undefweak)
6030 {
6031 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6032 eh->dyn_relocs = NULL;
6033
6034 /* Make sure undefined weak symbols are output as a dynamic
6035 symbol in PIEs. */
6036 else if (h->dynindx == -1
6037 && !h->forced_local
6038 && !h->def_regular)
6039 {
6040 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6041 return FALSE;
6042 }
6043 }
6044 }
6045 else if (ELIMINATE_COPY_RELOCS)
6046 {
6047 /* For the non-shared case, discard space for relocs against
6048 symbols which turn out to need copy relocs or are not
6049 dynamic. */
6050
6051 if (!h->non_got_ref
6052 && !h->def_regular)
6053 {
6054 /* Make sure this symbol is output as a dynamic symbol.
6055 Undefined weak syms won't yet be marked as dynamic. */
6056 if (h->dynindx == -1
6057 && !h->forced_local)
6058 {
6059 if (! bfd_elf_link_record_dynamic_symbol (info, h))
6060 return FALSE;
6061 }
6062
6063 /* If that succeeded, we know we'll be keeping all the
6064 relocs. */
6065 if (h->dynindx != -1)
6066 goto keep;
6067 }
6068
6069 eh->dyn_relocs = NULL;
6070
6071 keep: ;
6072 }
6073
6074 /* Finally, allocate space. */
6075 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6076 {
6077 asection *sreloc = elf_section_data (p->sec)->sreloc;
6078 if (eh->elf.type == STT_GNU_IFUNC)
6079 sreloc = htab->reliplt;
6080 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6081 }
6082
6083 return TRUE;
6084 }
6085
6086 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
6087 read-only sections. */
6088
6089 static bfd_boolean
6090 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
6091 {
6092 if (h->root.type == bfd_link_hash_indirect)
6093 return TRUE;
6094
6095 if (readonly_dynrelocs (h))
6096 {
6097 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
6098
6099 /* Not an error, just cut short the traversal. */
6100 return FALSE;
6101 }
6102 return TRUE;
6103 }
6104
6105 static const unsigned char glink_eh_frame_cie[] =
6106 {
6107 0, 0, 0, 16, /* length. */
6108 0, 0, 0, 0, /* id. */
6109 1, /* CIE version. */
6110 'z', 'R', 0, /* Augmentation string. */
6111 4, /* Code alignment. */
6112 0x7c, /* Data alignment. */
6113 65, /* RA reg. */
6114 1, /* Augmentation size. */
6115 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */
6116 DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */
6117 };
6118
6119 /* Set the sizes of the dynamic sections. */
6120
6121 static bfd_boolean
6122 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6123 struct bfd_link_info *info)
6124 {
6125 struct ppc_elf_link_hash_table *htab;
6126 asection *s;
6127 bfd_boolean relocs;
6128 bfd *ibfd;
6129
6130 #ifdef DEBUG
6131 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
6132 #endif
6133
6134 htab = ppc_elf_hash_table (info);
6135 BFD_ASSERT (htab->elf.dynobj != NULL);
6136
6137 if (elf_hash_table (info)->dynamic_sections_created)
6138 {
6139 /* Set the contents of the .interp section to the interpreter. */
6140 if (info->executable)
6141 {
6142 s = bfd_get_linker_section (htab->elf.dynobj, ".interp");
6143 BFD_ASSERT (s != NULL);
6144 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6145 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6146 }
6147 }
6148
6149 if (htab->plt_type == PLT_OLD)
6150 htab->got_header_size = 16;
6151 else if (htab->plt_type == PLT_NEW)
6152 htab->got_header_size = 12;
6153
6154 /* Set up .got offsets for local syms, and space for local dynamic
6155 relocs. */
6156 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6157 {
6158 bfd_signed_vma *local_got;
6159 bfd_signed_vma *end_local_got;
6160 struct plt_entry **local_plt;
6161 struct plt_entry **end_local_plt;
6162 char *lgot_masks;
6163 bfd_size_type locsymcount;
6164 Elf_Internal_Shdr *symtab_hdr;
6165
6166 if (!is_ppc_elf (ibfd))
6167 continue;
6168
6169 for (s = ibfd->sections; s != NULL; s = s->next)
6170 {
6171 struct ppc_dyn_relocs *p;
6172
6173 for (p = ((struct ppc_dyn_relocs *)
6174 elf_section_data (s)->local_dynrel);
6175 p != NULL;
6176 p = p->next)
6177 {
6178 if (!bfd_is_abs_section (p->sec)
6179 && bfd_is_abs_section (p->sec->output_section))
6180 {
6181 /* Input section has been discarded, either because
6182 it is a copy of a linkonce section or due to
6183 linker script /DISCARD/, so we'll be discarding
6184 the relocs too. */
6185 }
6186 else if (htab->is_vxworks
6187 && strcmp (p->sec->output_section->name,
6188 ".tls_vars") == 0)
6189 {
6190 /* Relocations in vxworks .tls_vars sections are
6191 handled specially by the loader. */
6192 }
6193 else if (p->count != 0)
6194 {
6195 asection *sreloc = elf_section_data (p->sec)->sreloc;
6196 if (p->ifunc)
6197 sreloc = htab->reliplt;
6198 sreloc->size += p->count * sizeof (Elf32_External_Rela);
6199 if ((p->sec->output_section->flags
6200 & (SEC_READONLY | SEC_ALLOC))
6201 == (SEC_READONLY | SEC_ALLOC))
6202 info->flags |= DF_TEXTREL;
6203 }
6204 }
6205 }
6206
6207 local_got = elf_local_got_refcounts (ibfd);
6208 if (!local_got)
6209 continue;
6210
6211 symtab_hdr = &elf_symtab_hdr (ibfd);
6212 locsymcount = symtab_hdr->sh_info;
6213 end_local_got = local_got + locsymcount;
6214 local_plt = (struct plt_entry **) end_local_got;
6215 end_local_plt = local_plt + locsymcount;
6216 lgot_masks = (char *) end_local_plt;
6217
6218 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
6219 if (*local_got > 0)
6220 {
6221 unsigned int need = 0;
6222 if ((*lgot_masks & TLS_TLS) != 0)
6223 {
6224 if ((*lgot_masks & TLS_GD) != 0)
6225 need += 8;
6226 if ((*lgot_masks & TLS_LD) != 0)
6227 htab->tlsld_got.refcount += 1;
6228 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
6229 need += 4;
6230 if ((*lgot_masks & TLS_DTPREL) != 0)
6231 need += 4;
6232 }
6233 else
6234 need += 4;
6235 if (need == 0)
6236 *local_got = (bfd_vma) -1;
6237 else
6238 {
6239 *local_got = allocate_got (htab, need);
6240 if (info->shared)
6241 {
6242 asection *srel = htab->relgot;
6243 if ((*lgot_masks & PLT_IFUNC) != 0)
6244 srel = htab->reliplt;
6245 srel->size += need * (sizeof (Elf32_External_Rela) / 4);
6246 }
6247 }
6248 }
6249 else
6250 *local_got = (bfd_vma) -1;
6251
6252 if (htab->is_vxworks)
6253 continue;
6254
6255 /* Allocate space for calls to local STT_GNU_IFUNC syms in .iplt. */
6256 for (; local_plt < end_local_plt; ++local_plt)
6257 {
6258 struct plt_entry *ent;
6259 bfd_boolean doneone = FALSE;
6260 bfd_vma plt_offset = 0, glink_offset = 0;
6261
6262 for (ent = *local_plt; ent != NULL; ent = ent->next)
6263 if (ent->plt.refcount > 0)
6264 {
6265 s = htab->iplt;
6266
6267 if (!doneone)
6268 {
6269 plt_offset = s->size;
6270 s->size += 4;
6271 }
6272 ent->plt.offset = plt_offset;
6273
6274 s = htab->glink;
6275 if (!doneone || info->shared)
6276 {
6277 glink_offset = s->size;
6278 s->size += GLINK_ENTRY_SIZE;
6279 }
6280 ent->glink_offset = glink_offset;
6281
6282 if (!doneone)
6283 {
6284 htab->reliplt->size += sizeof (Elf32_External_Rela);
6285 doneone = TRUE;
6286 }
6287 }
6288 else
6289 ent->plt.offset = (bfd_vma) -1;
6290 }
6291 }
6292
6293 /* Allocate space for global sym dynamic relocs. */
6294 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
6295
6296 if (htab->tlsld_got.refcount > 0)
6297 {
6298 htab->tlsld_got.offset = allocate_got (htab, 8);
6299 if (info->shared)
6300 htab->relgot->size += sizeof (Elf32_External_Rela);
6301 }
6302 else
6303 htab->tlsld_got.offset = (bfd_vma) -1;
6304
6305 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
6306 {
6307 unsigned int g_o_t = 32768;
6308
6309 /* If we haven't allocated the header, do so now. When we get here,
6310 for old plt/got the got size will be 0 to 32764 (not allocated),
6311 or 32780 to 65536 (header allocated). For new plt/got, the
6312 corresponding ranges are 0 to 32768 and 32780 to 65536. */
6313 if (htab->got->size <= 32768)
6314 {
6315 g_o_t = htab->got->size;
6316 if (htab->plt_type == PLT_OLD)
6317 g_o_t += 4;
6318 htab->got->size += htab->got_header_size;
6319 }
6320
6321 htab->elf.hgot->root.u.def.value = g_o_t;
6322 }
6323 if (info->shared)
6324 {
6325 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
6326 if (sda != NULL
6327 && !(sda->root.type == bfd_link_hash_defined
6328 || sda->root.type == bfd_link_hash_defweak))
6329 {
6330 sda->root.type = bfd_link_hash_defined;
6331 sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
6332 sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
6333 }
6334 }
6335
6336 if (htab->glink != NULL
6337 && htab->glink->size != 0
6338 && htab->elf.dynamic_sections_created)
6339 {
6340 htab->glink_pltresolve = htab->glink->size;
6341 /* Space for the branch table. */
6342 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
6343 /* Pad out to align the start of PLTresolve. */
6344 htab->glink->size += -htab->glink->size & (htab->params->ppc476_workaround
6345 ? 63 : 15);
6346 htab->glink->size += GLINK_PLTRESOLVE;
6347
6348 if (htab->params->emit_stub_syms)
6349 {
6350 struct elf_link_hash_entry *sh;
6351 sh = elf_link_hash_lookup (&htab->elf, "__glink",
6352 TRUE, FALSE, FALSE);
6353 if (sh == NULL)
6354 return FALSE;
6355 if (sh->root.type == bfd_link_hash_new)
6356 {
6357 sh->root.type = bfd_link_hash_defined;
6358 sh->root.u.def.section = htab->glink;
6359 sh->root.u.def.value = htab->glink_pltresolve;
6360 sh->ref_regular = 1;
6361 sh->def_regular = 1;
6362 sh->ref_regular_nonweak = 1;
6363 sh->forced_local = 1;
6364 sh->non_elf = 0;
6365 }
6366 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
6367 TRUE, FALSE, FALSE);
6368 if (sh == NULL)
6369 return FALSE;
6370 if (sh->root.type == bfd_link_hash_new)
6371 {
6372 sh->root.type = bfd_link_hash_defined;
6373 sh->root.u.def.section = htab->glink;
6374 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
6375 sh->ref_regular = 1;
6376 sh->def_regular = 1;
6377 sh->ref_regular_nonweak = 1;
6378 sh->forced_local = 1;
6379 sh->non_elf = 0;
6380 }
6381 }
6382 }
6383
6384 if (htab->glink != NULL
6385 && htab->glink->size != 0
6386 && htab->glink_eh_frame != NULL
6387 && !bfd_is_abs_section (htab->glink_eh_frame->output_section)
6388 && _bfd_elf_eh_frame_present (info))
6389 {
6390 s = htab->glink_eh_frame;
6391 s->size = sizeof (glink_eh_frame_cie) + 20;
6392 if (info->shared)
6393 {
6394 s->size += 4;
6395 if (htab->glink->size - GLINK_PLTRESOLVE + 8 >= 256)
6396 s->size += 4;
6397 }
6398 }
6399
6400 /* We've now determined the sizes of the various dynamic sections.
6401 Allocate memory for them. */
6402 relocs = FALSE;
6403 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
6404 {
6405 bfd_boolean strip_section = TRUE;
6406
6407 if ((s->flags & SEC_LINKER_CREATED) == 0)
6408 continue;
6409
6410 if (s == htab->plt
6411 || s == htab->got)
6412 {
6413 /* We'd like to strip these sections if they aren't needed, but if
6414 we've exported dynamic symbols from them we must leave them.
6415 It's too late to tell BFD to get rid of the symbols. */
6416 if (htab->elf.hplt != NULL)
6417 strip_section = FALSE;
6418 /* Strip this section if we don't need it; see the
6419 comment below. */
6420 }
6421 else if (s == htab->iplt
6422 || s == htab->glink
6423 || s == htab->glink_eh_frame
6424 || s == htab->sgotplt
6425 || s == htab->sbss
6426 || s == htab->dynbss
6427 || s == htab->dynsbss
6428 || s == htab->sdata[0].section
6429 || s == htab->sdata[1].section)
6430 {
6431 /* Strip these too. */
6432 }
6433 else if (CONST_STRNEQ (bfd_get_section_name (htab->elf.dynobj, s),
6434 ".rela"))
6435 {
6436 if (s->size != 0)
6437 {
6438 /* Remember whether there are any relocation sections. */
6439 relocs = TRUE;
6440
6441 /* We use the reloc_count field as a counter if we need
6442 to copy relocs into the output file. */
6443 s->reloc_count = 0;
6444 }
6445 }
6446 else
6447 {
6448 /* It's not one of our sections, so don't allocate space. */
6449 continue;
6450 }
6451
6452 if (s->size == 0 && strip_section)
6453 {
6454 /* If we don't need this section, strip it from the
6455 output file. This is mostly to handle .rela.bss and
6456 .rela.plt. We must create both sections in
6457 create_dynamic_sections, because they must be created
6458 before the linker maps input sections to output
6459 sections. The linker does that before
6460 adjust_dynamic_symbol is called, and it is that
6461 function which decides whether anything needs to go
6462 into these sections. */
6463 s->flags |= SEC_EXCLUDE;
6464 continue;
6465 }
6466
6467 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6468 continue;
6469
6470 /* Allocate memory for the section contents. */
6471 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
6472 if (s->contents == NULL)
6473 return FALSE;
6474 }
6475
6476 if (htab->elf.dynamic_sections_created)
6477 {
6478 /* Add some entries to the .dynamic section. We fill in the
6479 values later, in ppc_elf_finish_dynamic_sections, but we
6480 must add the entries now so that we get the correct size for
6481 the .dynamic section. The DT_DEBUG entry is filled in by the
6482 dynamic linker and used by the debugger. */
6483 #define add_dynamic_entry(TAG, VAL) \
6484 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6485
6486 if (info->executable)
6487 {
6488 if (!add_dynamic_entry (DT_DEBUG, 0))
6489 return FALSE;
6490 }
6491
6492 if (htab->plt != NULL && htab->plt->size != 0)
6493 {
6494 if (!add_dynamic_entry (DT_PLTGOT, 0)
6495 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6496 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6497 || !add_dynamic_entry (DT_JMPREL, 0))
6498 return FALSE;
6499 }
6500
6501 if (htab->plt_type == PLT_NEW
6502 && htab->glink != NULL
6503 && htab->glink->size != 0)
6504 {
6505 if (!add_dynamic_entry (DT_PPC_GOT, 0))
6506 return FALSE;
6507 if (!htab->params->no_tls_get_addr_opt
6508 && htab->tls_get_addr != NULL
6509 && htab->tls_get_addr->plt.plist != NULL
6510 && !add_dynamic_entry (DT_PPC_OPT, PPC_OPT_TLS))
6511 return FALSE;
6512 }
6513
6514 if (relocs)
6515 {
6516 if (!add_dynamic_entry (DT_RELA, 0)
6517 || !add_dynamic_entry (DT_RELASZ, 0)
6518 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
6519 return FALSE;
6520 }
6521
6522 /* If any dynamic relocs apply to a read-only section, then we
6523 need a DT_TEXTREL entry. */
6524 if ((info->flags & DF_TEXTREL) == 0)
6525 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
6526 info);
6527
6528 if ((info->flags & DF_TEXTREL) != 0)
6529 {
6530 if (!add_dynamic_entry (DT_TEXTREL, 0))
6531 return FALSE;
6532 }
6533 if (htab->is_vxworks
6534 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
6535 return FALSE;
6536 }
6537 #undef add_dynamic_entry
6538
6539 if (htab->glink_eh_frame != NULL
6540 && htab->glink_eh_frame->contents != NULL)
6541 {
6542 unsigned char *p = htab->glink_eh_frame->contents;
6543 bfd_vma val;
6544
6545 memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie));
6546 /* CIE length (rewrite in case little-endian). */
6547 bfd_put_32 (htab->elf.dynobj, sizeof (glink_eh_frame_cie) - 4, p);
6548 p += sizeof (glink_eh_frame_cie);
6549 /* FDE length. */
6550 val = htab->glink_eh_frame->size - 4 - sizeof (glink_eh_frame_cie);
6551 bfd_put_32 (htab->elf.dynobj, val, p);
6552 p += 4;
6553 /* CIE pointer. */
6554 val = p - htab->glink_eh_frame->contents;
6555 bfd_put_32 (htab->elf.dynobj, val, p);
6556 p += 4;
6557 /* Offset to .glink. Set later. */
6558 p += 4;
6559 /* .glink size. */
6560 bfd_put_32 (htab->elf.dynobj, htab->glink->size, p);
6561 p += 4;
6562 /* Augmentation. */
6563 p += 1;
6564
6565 if (info->shared
6566 && htab->elf.dynamic_sections_created)
6567 {
6568 bfd_vma adv = (htab->glink->size - GLINK_PLTRESOLVE + 8) >> 2;
6569 if (adv < 64)
6570 *p++ = DW_CFA_advance_loc + adv;
6571 else if (adv < 256)
6572 {
6573 *p++ = DW_CFA_advance_loc1;
6574 *p++ = adv;
6575 }
6576 else if (adv < 65536)
6577 {
6578 *p++ = DW_CFA_advance_loc2;
6579 bfd_put_16 (htab->elf.dynobj, adv, p);
6580 p += 2;
6581 }
6582 else
6583 {
6584 *p++ = DW_CFA_advance_loc4;
6585 bfd_put_32 (htab->elf.dynobj, adv, p);
6586 p += 4;
6587 }
6588 *p++ = DW_CFA_register;
6589 *p++ = 65;
6590 p++;
6591 *p++ = DW_CFA_advance_loc + 4;
6592 *p++ = DW_CFA_restore_extended;
6593 *p++ = 65;
6594 }
6595 BFD_ASSERT ((bfd_vma) ((p + 3 - htab->glink_eh_frame->contents) & -4)
6596 == htab->glink_eh_frame->size);
6597 }
6598
6599 return TRUE;
6600 }
6601
6602 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6603
6604 static bfd_boolean
6605 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
6606 {
6607 if (h->plt.plist != NULL
6608 && !h->def_regular
6609 && (!h->pointer_equality_needed
6610 || !h->ref_regular_nonweak))
6611 return FALSE;
6612
6613 return _bfd_elf_hash_symbol (h);
6614 }
6615 \f
6616 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
6617
6618 /* Relaxation trampolines. r12 is available for clobbering (r11, is
6619 used for some functions that are allowed to break the ABI). */
6620 static const int shared_stub_entry[] =
6621 {
6622 0x7c0802a6, /* mflr 0 */
6623 0x429f0005, /* bcl 20, 31, .Lxxx */
6624 0x7d8802a6, /* mflr 12 */
6625 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
6626 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
6627 0x7c0803a6, /* mtlr 0 */
6628 0x7d8903a6, /* mtctr 12 */
6629 0x4e800420, /* bctr */
6630 };
6631
6632 static const int stub_entry[] =
6633 {
6634 0x3d800000, /* lis 12,xxx@ha */
6635 0x398c0000, /* addi 12,12,xxx@l */
6636 0x7d8903a6, /* mtctr 12 */
6637 0x4e800420, /* bctr */
6638 };
6639
6640 struct ppc_elf_relax_info
6641 {
6642 unsigned int workaround_size;
6643 };
6644
6645 /* This function implements long branch trampolines, and the ppc476
6646 icache bug workaround. Any section needing trampolines or patch
6647 space for the workaround has its size extended so that we can
6648 add trampolines at the end of the section. FIXME: We write out
6649 trampoline templates here and later modify them in
6650 relocate_section. We'd save a realloc if we left writing the
6651 templates to relocate_section. */
6652
6653 static bfd_boolean
6654 ppc_elf_relax_section (bfd *abfd,
6655 asection *isec,
6656 struct bfd_link_info *link_info,
6657 bfd_boolean *again)
6658 {
6659 struct one_fixup
6660 {
6661 struct one_fixup *next;
6662 asection *tsec;
6663 /* Final link, can use the symbol offset. For a
6664 relocatable link we use the symbol's index. */
6665 bfd_vma toff;
6666 bfd_vma trampoff;
6667 };
6668
6669 Elf_Internal_Shdr *symtab_hdr;
6670 bfd_byte *contents = NULL;
6671 Elf_Internal_Sym *isymbuf = NULL;
6672 Elf_Internal_Rela *internal_relocs = NULL;
6673 Elf_Internal_Rela *irel, *irelend = NULL;
6674 struct one_fixup *fixups = NULL;
6675 struct ppc_elf_relax_info *relax_info = NULL;
6676 unsigned changes = 0;
6677 bfd_boolean workaround_change;
6678 struct ppc_elf_link_hash_table *htab;
6679 bfd_size_type trampbase, trampoff, newsize;
6680 asection *got2;
6681 bfd_boolean maybe_pasted;
6682
6683 *again = FALSE;
6684
6685 /* No need to do anything with non-alloc or non-code sections. */
6686 if ((isec->flags & SEC_ALLOC) == 0
6687 || (isec->flags & SEC_CODE) == 0
6688 || (isec->flags & SEC_LINKER_CREATED) != 0
6689 || isec->size < 4)
6690 return TRUE;
6691
6692 /* We cannot represent the required PIC relocs in the output, so don't
6693 do anything. The linker doesn't support mixing -shared and -r
6694 anyway. */
6695 if (link_info->relocatable && link_info->shared)
6696 return TRUE;
6697
6698 htab = ppc_elf_hash_table (link_info);
6699 if (htab == NULL)
6700 return TRUE;
6701
6702 isec->size = (isec->size + 3) & -4;
6703 if (isec->rawsize == 0)
6704 isec->rawsize = isec->size;
6705 trampbase = isec->size;
6706
6707 if (htab->params->ppc476_workaround)
6708 {
6709 if (elf_section_data (isec)->sec_info == NULL)
6710 {
6711 BFD_ASSERT (isec->sec_info_type == SEC_INFO_TYPE_NONE);
6712 isec->sec_info_type = SEC_INFO_TYPE_TARGET;
6713 elf_section_data (isec)->sec_info
6714 = bfd_zalloc (abfd, sizeof (struct ppc_elf_relax_info));
6715 if (elf_section_data (isec)->sec_info == NULL)
6716 return FALSE;
6717 }
6718 relax_info = elf_section_data (isec)->sec_info;
6719 trampbase -= relax_info->workaround_size;
6720 }
6721
6722 maybe_pasted = (strcmp (isec->output_section->name, ".init") == 0
6723 || strcmp (isec->output_section->name, ".fini") == 0);
6724 /* Space for a branch around any trampolines. */
6725 trampoff = trampbase;
6726 if (maybe_pasted && trampbase == isec->rawsize)
6727 trampoff += 4;
6728
6729 symtab_hdr = &elf_symtab_hdr (abfd);
6730
6731 if (htab->params->branch_trampolines)
6732 {
6733 /* Get a copy of the native relocations. */
6734 if (isec->reloc_count != 0)
6735 {
6736 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
6737 link_info->keep_memory);
6738 if (internal_relocs == NULL)
6739 goto error_return;
6740 }
6741
6742 got2 = bfd_get_section_by_name (abfd, ".got2");
6743
6744 irelend = internal_relocs + isec->reloc_count;
6745 for (irel = internal_relocs; irel < irelend; irel++)
6746 {
6747 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
6748 bfd_vma toff, roff;
6749 asection *tsec;
6750 struct one_fixup *f;
6751 size_t insn_offset = 0;
6752 bfd_vma max_branch_offset, val;
6753 bfd_byte *hit_addr;
6754 unsigned long t0;
6755 struct elf_link_hash_entry *h;
6756 struct plt_entry **plist;
6757 unsigned char sym_type;
6758
6759 switch (r_type)
6760 {
6761 case R_PPC_REL24:
6762 case R_PPC_LOCAL24PC:
6763 case R_PPC_PLTREL24:
6764 max_branch_offset = 1 << 25;
6765 break;
6766
6767 case R_PPC_REL14:
6768 case R_PPC_REL14_BRTAKEN:
6769 case R_PPC_REL14_BRNTAKEN:
6770 max_branch_offset = 1 << 15;
6771 break;
6772
6773 default:
6774 continue;
6775 }
6776
6777 /* Get the value of the symbol referred to by the reloc. */
6778 h = NULL;
6779 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
6780 {
6781 /* A local symbol. */
6782 Elf_Internal_Sym *isym;
6783
6784 /* Read this BFD's local symbols. */
6785 if (isymbuf == NULL)
6786 {
6787 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
6788 if (isymbuf == NULL)
6789 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
6790 symtab_hdr->sh_info, 0,
6791 NULL, NULL, NULL);
6792 if (isymbuf == 0)
6793 goto error_return;
6794 }
6795 isym = isymbuf + ELF32_R_SYM (irel->r_info);
6796 if (isym->st_shndx == SHN_UNDEF)
6797 tsec = bfd_und_section_ptr;
6798 else if (isym->st_shndx == SHN_ABS)
6799 tsec = bfd_abs_section_ptr;
6800 else if (isym->st_shndx == SHN_COMMON)
6801 tsec = bfd_com_section_ptr;
6802 else
6803 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
6804
6805 toff = isym->st_value;
6806 sym_type = ELF_ST_TYPE (isym->st_info);
6807 }
6808 else
6809 {
6810 /* Global symbol handling. */
6811 unsigned long indx;
6812
6813 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
6814 h = elf_sym_hashes (abfd)[indx];
6815
6816 while (h->root.type == bfd_link_hash_indirect
6817 || h->root.type == bfd_link_hash_warning)
6818 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6819
6820 if (h->root.type == bfd_link_hash_defined
6821 || h->root.type == bfd_link_hash_defweak)
6822 {
6823 tsec = h->root.u.def.section;
6824 toff = h->root.u.def.value;
6825 }
6826 else if (h->root.type == bfd_link_hash_undefined
6827 || h->root.type == bfd_link_hash_undefweak)
6828 {
6829 tsec = bfd_und_section_ptr;
6830 toff = link_info->relocatable ? indx : 0;
6831 }
6832 else
6833 continue;
6834
6835 sym_type = h->type;
6836 }
6837
6838 /* The condition here under which we call find_plt_ent must
6839 match that in relocate_section. If we call find_plt_ent here
6840 but not in relocate_section, or vice versa, then the branch
6841 destination used here may be incorrect. */
6842 plist = NULL;
6843 if (h != NULL)
6844 {
6845 /* We know is_branch_reloc (r_type) is true. */
6846 if (h->type == STT_GNU_IFUNC
6847 || r_type == R_PPC_PLTREL24)
6848 plist = &h->plt.plist;
6849 }
6850 else if (sym_type == STT_GNU_IFUNC
6851 && elf_local_got_offsets (abfd) != NULL)
6852 {
6853 bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
6854 struct plt_entry **local_plt = (struct plt_entry **)
6855 (local_got_offsets + symtab_hdr->sh_info);
6856 plist = local_plt + ELF32_R_SYM (irel->r_info);
6857 }
6858 if (plist != NULL)
6859 {
6860 bfd_vma addend = 0;
6861 struct plt_entry *ent;
6862
6863 if (r_type == R_PPC_PLTREL24 && link_info->shared)
6864 addend = irel->r_addend;
6865 ent = find_plt_ent (plist, got2, addend);
6866 if (ent != NULL)
6867 {
6868 if (htab->plt_type == PLT_NEW
6869 || h == NULL
6870 || !htab->elf.dynamic_sections_created
6871 || h->dynindx == -1)
6872 {
6873 tsec = htab->glink;
6874 toff = ent->glink_offset;
6875 }
6876 else
6877 {
6878 tsec = htab->plt;
6879 toff = ent->plt.offset;
6880 }
6881 }
6882 }
6883
6884 /* If the branch and target are in the same section, you have
6885 no hope of adding stubs. We'll error out later should the
6886 branch overflow. */
6887 if (tsec == isec)
6888 continue;
6889
6890 /* There probably isn't any reason to handle symbols in
6891 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
6892 attribute for a code section, and we are only looking at
6893 branches. However, implement it correctly here as a
6894 reference for other target relax_section functions. */
6895 if (0 && tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
6896 {
6897 /* At this stage in linking, no SEC_MERGE symbol has been
6898 adjusted, so all references to such symbols need to be
6899 passed through _bfd_merged_section_offset. (Later, in
6900 relocate_section, all SEC_MERGE symbols *except* for
6901 section symbols have been adjusted.)
6902
6903 gas may reduce relocations against symbols in SEC_MERGE
6904 sections to a relocation against the section symbol when
6905 the original addend was zero. When the reloc is against
6906 a section symbol we should include the addend in the
6907 offset passed to _bfd_merged_section_offset, since the
6908 location of interest is the original symbol. On the
6909 other hand, an access to "sym+addend" where "sym" is not
6910 a section symbol should not include the addend; Such an
6911 access is presumed to be an offset from "sym"; The
6912 location of interest is just "sym". */
6913 if (sym_type == STT_SECTION)
6914 toff += irel->r_addend;
6915
6916 toff
6917 = _bfd_merged_section_offset (abfd, &tsec,
6918 elf_section_data (tsec)->sec_info,
6919 toff);
6920
6921 if (sym_type != STT_SECTION)
6922 toff += irel->r_addend;
6923 }
6924 /* PLTREL24 addends are special. */
6925 else if (r_type != R_PPC_PLTREL24)
6926 toff += irel->r_addend;
6927
6928 /* Attempted -shared link of non-pic code loses. */
6929 if ((!link_info->relocatable
6930 && tsec == bfd_und_section_ptr)
6931 || tsec->output_section == NULL
6932 || (tsec->owner != NULL
6933 && (tsec->owner->flags & BFD_PLUGIN) != 0))
6934 continue;
6935
6936 roff = irel->r_offset;
6937
6938 /* If the branch is in range, no need to do anything. */
6939 if (tsec != bfd_und_section_ptr
6940 && (!link_info->relocatable
6941 /* A relocatable link may have sections moved during
6942 final link, so do not presume they remain in range. */
6943 || tsec->output_section == isec->output_section))
6944 {
6945 bfd_vma symaddr, reladdr;
6946
6947 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
6948 reladdr = isec->output_section->vma + isec->output_offset + roff;
6949 if (symaddr - reladdr + max_branch_offset
6950 < 2 * max_branch_offset)
6951 continue;
6952 }
6953
6954 /* Look for an existing fixup to this address. */
6955 for (f = fixups; f ; f = f->next)
6956 if (f->tsec == tsec && f->toff == toff)
6957 break;
6958
6959 if (f == NULL)
6960 {
6961 size_t size;
6962 unsigned long stub_rtype;
6963
6964 val = trampoff - roff;
6965 if (val >= max_branch_offset)
6966 /* Oh dear, we can't reach a trampoline. Don't try to add
6967 one. We'll report an error later. */
6968 continue;
6969
6970 if (link_info->shared)
6971 {
6972 size = 4 * ARRAY_SIZE (shared_stub_entry);
6973 insn_offset = 12;
6974 }
6975 else
6976 {
6977 size = 4 * ARRAY_SIZE (stub_entry);
6978 insn_offset = 0;
6979 }
6980 stub_rtype = R_PPC_RELAX;
6981 if (tsec == htab->plt
6982 || tsec == htab->glink)
6983 {
6984 stub_rtype = R_PPC_RELAX_PLT;
6985 if (r_type == R_PPC_PLTREL24)
6986 stub_rtype = R_PPC_RELAX_PLTREL24;
6987 }
6988
6989 /* Hijack the old relocation. Since we need two
6990 relocations for this use a "composite" reloc. */
6991 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
6992 stub_rtype);
6993 irel->r_offset = trampoff + insn_offset;
6994 if (r_type == R_PPC_PLTREL24
6995 && stub_rtype != R_PPC_RELAX_PLTREL24)
6996 irel->r_addend = 0;
6997
6998 /* Record the fixup so we don't do it again this section. */
6999 f = bfd_malloc (sizeof (*f));
7000 f->next = fixups;
7001 f->tsec = tsec;
7002 f->toff = toff;
7003 f->trampoff = trampoff;
7004 fixups = f;
7005
7006 trampoff += size;
7007 changes++;
7008 }
7009 else
7010 {
7011 val = f->trampoff - roff;
7012 if (val >= max_branch_offset)
7013 continue;
7014
7015 /* Nop out the reloc, since we're finalizing things here. */
7016 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7017 }
7018
7019 /* Get the section contents. */
7020 if (contents == NULL)
7021 {
7022 /* Get cached copy if it exists. */
7023 if (elf_section_data (isec)->this_hdr.contents != NULL)
7024 contents = elf_section_data (isec)->this_hdr.contents;
7025 /* Go get them off disk. */
7026 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7027 goto error_return;
7028 }
7029
7030 /* Fix up the existing branch to hit the trampoline. */
7031 hit_addr = contents + roff;
7032 switch (r_type)
7033 {
7034 case R_PPC_REL24:
7035 case R_PPC_LOCAL24PC:
7036 case R_PPC_PLTREL24:
7037 t0 = bfd_get_32 (abfd, hit_addr);
7038 t0 &= ~0x3fffffc;
7039 t0 |= val & 0x3fffffc;
7040 bfd_put_32 (abfd, t0, hit_addr);
7041 break;
7042
7043 case R_PPC_REL14:
7044 case R_PPC_REL14_BRTAKEN:
7045 case R_PPC_REL14_BRNTAKEN:
7046 t0 = bfd_get_32 (abfd, hit_addr);
7047 t0 &= ~0xfffc;
7048 t0 |= val & 0xfffc;
7049 bfd_put_32 (abfd, t0, hit_addr);
7050 break;
7051 }
7052 }
7053
7054 while (fixups != NULL)
7055 {
7056 struct one_fixup *f = fixups;
7057 fixups = fixups->next;
7058 free (f);
7059 }
7060 }
7061
7062 workaround_change = FALSE;
7063 newsize = trampoff;
7064 if (htab->params->ppc476_workaround)
7065 {
7066 bfd_vma addr, end_addr;
7067 unsigned int crossings;
7068 unsigned int pagesize = htab->params->pagesize;
7069
7070 addr = isec->output_section->vma + isec->output_offset;
7071 end_addr = addr + trampoff - 1;
7072 addr &= -pagesize;
7073 crossings = ((end_addr & -pagesize) - addr) / pagesize;
7074 if (crossings != 0)
7075 {
7076 /* Keep space aligned, to ensure the patch code itself does
7077 not cross a page. Don't decrease size calculated on a
7078 previous pass as otherwise we might never settle on a layout. */
7079 newsize = 15 - (end_addr & 15);
7080 newsize += crossings * 16;
7081 if (relax_info->workaround_size < newsize)
7082 {
7083 relax_info->workaround_size = newsize;
7084 workaround_change = TRUE;
7085 if (contents == NULL)
7086 {
7087 if (elf_section_data (isec)->this_hdr.contents != NULL)
7088 contents = elf_section_data (isec)->this_hdr.contents;
7089 else if (!bfd_malloc_and_get_section (abfd, isec, &contents))
7090 goto error_return;
7091 }
7092 }
7093 /* Ensure relocate_section is called. */
7094 isec->flags |= SEC_RELOC;
7095 }
7096 newsize = trampoff + relax_info->workaround_size;
7097 }
7098
7099 if (changes || workaround_change)
7100 {
7101 contents = bfd_realloc_or_free (contents, newsize);
7102 if (contents == NULL)
7103 goto error_return;
7104
7105 /* Branch around the trampolines. */
7106 if (maybe_pasted)
7107 {
7108 bfd_vma val = B + newsize - isec->rawsize;
7109 bfd_put_32 (abfd, val, contents + isec->rawsize);
7110 }
7111 }
7112
7113 /* Write out the trampolines. */
7114 if (changes)
7115 {
7116 const int *stub;
7117 bfd_byte *dest;
7118 int i, size;
7119
7120 dest = contents + trampbase;
7121 if (maybe_pasted && trampbase == isec->rawsize)
7122 dest += 4;
7123
7124 if (link_info->shared)
7125 {
7126 stub = shared_stub_entry;
7127 size = ARRAY_SIZE (shared_stub_entry);
7128 }
7129 else
7130 {
7131 stub = stub_entry;
7132 size = ARRAY_SIZE (stub_entry);
7133 }
7134
7135 i = 0;
7136 while (dest < contents + trampoff)
7137 {
7138 bfd_put_32 (abfd, stub[i], dest);
7139 i++;
7140 if (i == size)
7141 i = 0;
7142 dest += 4;
7143 }
7144 BFD_ASSERT (i == 0);
7145 }
7146
7147 if (changes || workaround_change)
7148 isec->size = newsize;
7149
7150 if (isymbuf != NULL
7151 && symtab_hdr->contents != (unsigned char *) isymbuf)
7152 {
7153 if (! link_info->keep_memory)
7154 free (isymbuf);
7155 else
7156 {
7157 /* Cache the symbols for elf_link_input_bfd. */
7158 symtab_hdr->contents = (unsigned char *) isymbuf;
7159 }
7160 }
7161
7162 if (contents != NULL
7163 && elf_section_data (isec)->this_hdr.contents != contents)
7164 {
7165 if (!changes && !workaround_change && !link_info->keep_memory)
7166 free (contents);
7167 else
7168 {
7169 /* Cache the section contents for elf_link_input_bfd. */
7170 elf_section_data (isec)->this_hdr.contents = contents;
7171 }
7172 }
7173
7174 if (changes != 0)
7175 {
7176 /* Append sufficient NOP relocs so we can write out relocation
7177 information for the trampolines. */
7178 Elf_Internal_Shdr *rel_hdr;
7179 Elf_Internal_Rela *new_relocs = bfd_malloc ((changes + isec->reloc_count)
7180 * sizeof (*new_relocs));
7181 unsigned ix;
7182
7183 if (!new_relocs)
7184 goto error_return;
7185 memcpy (new_relocs, internal_relocs,
7186 isec->reloc_count * sizeof (*new_relocs));
7187 for (ix = changes; ix--;)
7188 {
7189 irel = new_relocs + ix + isec->reloc_count;
7190
7191 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
7192 }
7193 if (internal_relocs != elf_section_data (isec)->relocs)
7194 free (internal_relocs);
7195 elf_section_data (isec)->relocs = new_relocs;
7196 isec->reloc_count += changes;
7197 rel_hdr = _bfd_elf_single_rel_hdr (isec);
7198 rel_hdr->sh_size += changes * rel_hdr->sh_entsize;
7199 }
7200 else if (internal_relocs != NULL
7201 && elf_section_data (isec)->relocs != internal_relocs)
7202 free (internal_relocs);
7203
7204 *again = changes != 0 || workaround_change;
7205 if (!*again && link_info->relocatable && htab->params->branch_trampolines)
7206 {
7207 /* Convert the internal relax relocs to external form. */
7208 for (irel = internal_relocs; irel < irelend; irel++)
7209 if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
7210 {
7211 unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
7212
7213 /* Rewrite the reloc and convert one of the trailing nop
7214 relocs to describe this relocation. */
7215 BFD_ASSERT (ELF32_R_TYPE (irelend[-1].r_info) == R_PPC_NONE);
7216 /* The relocs are at the bottom 2 bytes */
7217 irel[0].r_offset += 2;
7218 memmove (irel + 1, irel, (irelend - irel - 1) * sizeof (*irel));
7219 irel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
7220 irel[1].r_offset += 4;
7221 irel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
7222 irel++;
7223 }
7224 }
7225
7226 return TRUE;
7227
7228 error_return:
7229 while (fixups != NULL)
7230 {
7231 struct one_fixup *f = fixups;
7232 fixups = fixups->next;
7233 free (f);
7234 }
7235 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
7236 free (isymbuf);
7237 if (contents != NULL
7238 && elf_section_data (isec)->this_hdr.contents != contents)
7239 free (contents);
7240 if (internal_relocs != NULL
7241 && elf_section_data (isec)->relocs != internal_relocs)
7242 free (internal_relocs);
7243 return FALSE;
7244 }
7245 \f
7246 /* What to do when ld finds relocations against symbols defined in
7247 discarded sections. */
7248
7249 static unsigned int
7250 ppc_elf_action_discarded (asection *sec)
7251 {
7252 if (strcmp (".fixup", sec->name) == 0)
7253 return 0;
7254
7255 if (strcmp (".got2", sec->name) == 0)
7256 return 0;
7257
7258 return _bfd_elf_default_action_discarded (sec);
7259 }
7260 \f
7261 /* Fill in the address for a pointer generated in a linker section. */
7262
7263 static bfd_vma
7264 elf_finish_pointer_linker_section (bfd *input_bfd,
7265 elf_linker_section_t *lsect,
7266 struct elf_link_hash_entry *h,
7267 bfd_vma relocation,
7268 const Elf_Internal_Rela *rel)
7269 {
7270 elf_linker_section_pointers_t *linker_section_ptr;
7271
7272 BFD_ASSERT (lsect != NULL);
7273
7274 if (h != NULL)
7275 {
7276 /* Handle global symbol. */
7277 struct ppc_elf_link_hash_entry *eh;
7278
7279 eh = (struct ppc_elf_link_hash_entry *) h;
7280 BFD_ASSERT (eh->elf.def_regular);
7281 linker_section_ptr = eh->linker_section_pointer;
7282 }
7283 else
7284 {
7285 /* Handle local symbol. */
7286 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
7287
7288 BFD_ASSERT (is_ppc_elf (input_bfd));
7289 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
7290 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
7291 }
7292
7293 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
7294 rel->r_addend,
7295 lsect);
7296 BFD_ASSERT (linker_section_ptr != NULL);
7297
7298 /* Offset will always be a multiple of four, so use the bottom bit
7299 as a "written" flag. */
7300 if ((linker_section_ptr->offset & 1) == 0)
7301 {
7302 bfd_put_32 (lsect->section->owner,
7303 relocation + linker_section_ptr->addend,
7304 lsect->section->contents + linker_section_ptr->offset);
7305 linker_section_ptr->offset += 1;
7306 }
7307
7308 relocation = (lsect->section->output_section->vma
7309 + lsect->section->output_offset
7310 + linker_section_ptr->offset - 1
7311 - SYM_VAL (lsect->sym));
7312
7313 #ifdef DEBUG
7314 fprintf (stderr,
7315 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7316 lsect->name, (long) relocation, (long) relocation);
7317 #endif
7318
7319 return relocation;
7320 }
7321
7322 #define PPC_LO(v) ((v) & 0xffff)
7323 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7324 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7325
7326 static void
7327 write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
7328 struct bfd_link_info *info)
7329 {
7330 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
7331 bfd *output_bfd = info->output_bfd;
7332 bfd_vma plt;
7333
7334 plt = ((ent->plt.offset & ~1)
7335 + plt_sec->output_section->vma
7336 + plt_sec->output_offset);
7337
7338 if (info->shared)
7339 {
7340 bfd_vma got = 0;
7341
7342 if (ent->addend >= 32768)
7343 got = (ent->addend
7344 + ent->sec->output_section->vma
7345 + ent->sec->output_offset);
7346 else if (htab->elf.hgot != NULL)
7347 got = SYM_VAL (htab->elf.hgot);
7348
7349 plt -= got;
7350
7351 if (plt + 0x8000 < 0x10000)
7352 {
7353 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7354 p += 4;
7355 bfd_put_32 (output_bfd, MTCTR_11, p);
7356 p += 4;
7357 bfd_put_32 (output_bfd, BCTR, p);
7358 p += 4;
7359 bfd_put_32 (output_bfd, NOP, p);
7360 p += 4;
7361 }
7362 else
7363 {
7364 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7365 p += 4;
7366 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7367 p += 4;
7368 bfd_put_32 (output_bfd, MTCTR_11, p);
7369 p += 4;
7370 bfd_put_32 (output_bfd, BCTR, p);
7371 p += 4;
7372 }
7373 }
7374 else
7375 {
7376 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7377 p += 4;
7378 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7379 p += 4;
7380 bfd_put_32 (output_bfd, MTCTR_11, p);
7381 p += 4;
7382 bfd_put_32 (output_bfd, BCTR, p);
7383 p += 4;
7384 }
7385 }
7386
7387 /* Return true if symbol is defined statically. */
7388
7389 static bfd_boolean
7390 is_static_defined (struct elf_link_hash_entry *h)
7391 {
7392 return ((h->root.type == bfd_link_hash_defined
7393 || h->root.type == bfd_link_hash_defweak)
7394 && h->root.u.def.section != NULL
7395 && h->root.u.def.section->output_section != NULL);
7396 }
7397
7398 /* If INSN is an opcode that may be used with an @tls operand, return
7399 the transformed insn for TLS optimisation, otherwise return 0. If
7400 REG is non-zero only match an insn with RB or RA equal to REG. */
7401
7402 unsigned int
7403 _bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
7404 {
7405 unsigned int rtra;
7406
7407 if ((insn & (0x3f << 26)) != 31 << 26)
7408 return 0;
7409
7410 if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
7411 rtra = insn & ((1 << 26) - (1 << 16));
7412 else if (((insn >> 16) & 0x1f) == reg)
7413 rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
7414 else
7415 return 0;
7416
7417 if ((insn & (0x3ff << 1)) == 266 << 1)
7418 /* add -> addi. */
7419 insn = 14 << 26;
7420 else if ((insn & (0x1f << 1)) == 23 << 1
7421 && ((insn & (0x1f << 6)) < 14 << 6
7422 || ((insn & (0x1f << 6)) >= 16 << 6
7423 && (insn & (0x1f << 6)) < 24 << 6)))
7424 /* load and store indexed -> dform. */
7425 insn = (32 | ((insn >> 6) & 0x1f)) << 26;
7426 else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
7427 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
7428 insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
7429 else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
7430 /* lwax -> lwa. */
7431 insn = (58 << 26) | 2;
7432 else
7433 return 0;
7434 insn |= rtra;
7435 return insn;
7436 }
7437
7438 /* If INSN is an opcode that may be used with an @tprel operand, return
7439 the transformed insn for an undefined weak symbol, ie. with the
7440 thread pointer REG operand removed. Otherwise return 0. */
7441
7442 unsigned int
7443 _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
7444 {
7445 if ((insn & (0x1f << 16)) == reg << 16
7446 && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
7447 || (insn & (0x3f << 26)) == 15u << 26 /* addis */
7448 || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
7449 || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
7450 || (insn & (0x3f << 26)) == 36u << 26 /* stw */
7451 || (insn & (0x3f << 26)) == 38u << 26 /* stb */
7452 || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
7453 || (insn & (0x3f << 26)) == 42u << 26 /* lha */
7454 || (insn & (0x3f << 26)) == 44u << 26 /* sth */
7455 || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
7456 || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
7457 || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
7458 || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
7459 || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
7460 || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
7461 || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
7462 && (insn & 3) != 1)
7463 || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
7464 && ((insn & 3) == 0 || (insn & 3) == 3))))
7465 {
7466 insn &= ~(0x1f << 16);
7467 }
7468 else if ((insn & (0x1f << 21)) == reg << 21
7469 && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
7470 || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
7471 || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
7472 {
7473 insn &= ~(0x1f << 21);
7474 insn |= (insn & (0x1f << 16)) << 5;
7475 if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
7476 insn -= 2 >> 26; /* convert to ori,oris */
7477 }
7478 else
7479 insn = 0;
7480 return insn;
7481 }
7482
7483 static bfd_boolean
7484 is_insn_ds_form (unsigned int insn)
7485 {
7486 return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */
7487 || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */
7488 || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */
7489 || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */);
7490 }
7491
7492 static bfd_boolean
7493 is_insn_dq_form (unsigned int insn)
7494 {
7495 return (insn & (0x3f << 26)) == 56u << 26; /* lq */
7496 }
7497
7498 /* The RELOCATE_SECTION function is called by the ELF backend linker
7499 to handle the relocations for a section.
7500
7501 The relocs are always passed as Rela structures; if the section
7502 actually uses Rel structures, the r_addend field will always be
7503 zero.
7504
7505 This function is responsible for adjust the section contents as
7506 necessary, and (if using Rela relocs and generating a
7507 relocatable output file) adjusting the reloc addend as
7508 necessary.
7509
7510 This function does not have to worry about setting the reloc
7511 address or the reloc symbol index.
7512
7513 LOCAL_SYMS is a pointer to the swapped in local symbols.
7514
7515 LOCAL_SECTIONS is an array giving the section in the input file
7516 corresponding to the st_shndx field of each local symbol.
7517
7518 The global hash table entry for the global symbols can be found
7519 via elf_sym_hashes (input_bfd).
7520
7521 When generating relocatable output, this function must handle
7522 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
7523 going to be the section symbol corresponding to the output
7524 section, which means that the addend must be adjusted
7525 accordingly. */
7526
7527 static bfd_boolean
7528 ppc_elf_relocate_section (bfd *output_bfd,
7529 struct bfd_link_info *info,
7530 bfd *input_bfd,
7531 asection *input_section,
7532 bfd_byte *contents,
7533 Elf_Internal_Rela *relocs,
7534 Elf_Internal_Sym *local_syms,
7535 asection **local_sections)
7536 {
7537 Elf_Internal_Shdr *symtab_hdr;
7538 struct elf_link_hash_entry **sym_hashes;
7539 struct ppc_elf_link_hash_table *htab;
7540 Elf_Internal_Rela *rel;
7541 Elf_Internal_Rela *relend;
7542 Elf_Internal_Rela outrel;
7543 asection *got2;
7544 bfd_vma *local_got_offsets;
7545 bfd_boolean ret = TRUE;
7546 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
7547 bfd_boolean is_vxworks_tls;
7548
7549 #ifdef DEBUG
7550 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
7551 "%ld relocations%s",
7552 input_bfd, input_section,
7553 (long) input_section->reloc_count,
7554 (info->relocatable) ? " (relocatable)" : "");
7555 #endif
7556
7557 got2 = bfd_get_section_by_name (input_bfd, ".got2");
7558
7559 /* Initialize howto table if not already done. */
7560 if (!ppc_elf_howto_table[R_PPC_ADDR32])
7561 ppc_elf_howto_init ();
7562
7563 htab = ppc_elf_hash_table (info);
7564 local_got_offsets = elf_local_got_offsets (input_bfd);
7565 symtab_hdr = &elf_symtab_hdr (input_bfd);
7566 sym_hashes = elf_sym_hashes (input_bfd);
7567 /* We have to handle relocations in vxworks .tls_vars sections
7568 specially, because the dynamic loader is 'weird'. */
7569 is_vxworks_tls = (htab->is_vxworks && info->shared
7570 && !strcmp (input_section->output_section->name,
7571 ".tls_vars"));
7572 rel = relocs;
7573 relend = relocs + input_section->reloc_count;
7574 for (; rel < relend; rel++)
7575 {
7576 enum elf_ppc_reloc_type r_type;
7577 bfd_vma addend;
7578 bfd_reloc_status_type r;
7579 Elf_Internal_Sym *sym;
7580 asection *sec;
7581 struct elf_link_hash_entry *h;
7582 const char *sym_name;
7583 reloc_howto_type *howto;
7584 unsigned long r_symndx;
7585 bfd_vma relocation;
7586 bfd_vma branch_bit, from;
7587 bfd_boolean unresolved_reloc;
7588 bfd_boolean warned;
7589 unsigned int tls_type, tls_mask, tls_gd;
7590 struct plt_entry **ifunc;
7591
7592 r_type = ELF32_R_TYPE (rel->r_info);
7593 sym = NULL;
7594 sec = NULL;
7595 h = NULL;
7596 unresolved_reloc = FALSE;
7597 warned = FALSE;
7598 r_symndx = ELF32_R_SYM (rel->r_info);
7599
7600 if (r_symndx < symtab_hdr->sh_info)
7601 {
7602 sym = local_syms + r_symndx;
7603 sec = local_sections[r_symndx];
7604 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
7605
7606 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
7607 }
7608 else
7609 {
7610 bfd_boolean ignored;
7611
7612 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
7613 r_symndx, symtab_hdr, sym_hashes,
7614 h, sec, relocation,
7615 unresolved_reloc, warned, ignored);
7616
7617 sym_name = h->root.root.string;
7618 }
7619
7620 if (sec != NULL && discarded_section (sec))
7621 {
7622 /* For relocs against symbols from removed linkonce sections,
7623 or sections discarded by a linker script, we just want the
7624 section contents zeroed. Avoid any special processing. */
7625 howto = NULL;
7626 if (r_type < R_PPC_max)
7627 howto = ppc_elf_howto_table[r_type];
7628 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
7629 rel, 1, relend, howto, 0, contents);
7630 }
7631
7632 if (info->relocatable)
7633 {
7634 if (got2 != NULL
7635 && r_type == R_PPC_PLTREL24
7636 && rel->r_addend != 0)
7637 {
7638 /* R_PPC_PLTREL24 is rather special. If non-zero, the
7639 addend specifies the GOT pointer offset within .got2. */
7640 rel->r_addend += got2->output_offset;
7641 }
7642 continue;
7643 }
7644
7645 /* TLS optimizations. Replace instruction sequences and relocs
7646 based on information we collected in tls_optimize. We edit
7647 RELOCS so that --emit-relocs will output something sensible
7648 for the final instruction stream. */
7649 tls_mask = 0;
7650 tls_gd = 0;
7651 if (h != NULL)
7652 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
7653 else if (local_got_offsets != NULL)
7654 {
7655 struct plt_entry **local_plt;
7656 char *lgot_masks;
7657 local_plt
7658 = (struct plt_entry **) (local_got_offsets + symtab_hdr->sh_info);
7659 lgot_masks = (char *) (local_plt + symtab_hdr->sh_info);
7660 tls_mask = lgot_masks[r_symndx];
7661 }
7662
7663 /* Ensure reloc mapping code below stays sane. */
7664 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
7665 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
7666 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
7667 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
7668 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
7669 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
7670 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
7671 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
7672 abort ();
7673 switch (r_type)
7674 {
7675 default:
7676 break;
7677
7678 case R_PPC_GOT_TPREL16:
7679 case R_PPC_GOT_TPREL16_LO:
7680 if ((tls_mask & TLS_TLS) != 0
7681 && (tls_mask & TLS_TPREL) == 0)
7682 {
7683 bfd_vma insn;
7684
7685 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
7686 insn &= 31 << 21;
7687 insn |= 0x3c020000; /* addis 0,2,0 */
7688 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
7689 r_type = R_PPC_TPREL16_HA;
7690 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7691 }
7692 break;
7693
7694 case R_PPC_TLS:
7695 if ((tls_mask & TLS_TLS) != 0
7696 && (tls_mask & TLS_TPREL) == 0)
7697 {
7698 bfd_vma insn;
7699
7700 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7701 insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
7702 if (insn == 0)
7703 abort ();
7704 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7705 r_type = R_PPC_TPREL16_LO;
7706 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7707
7708 /* Was PPC_TLS which sits on insn boundary, now
7709 PPC_TPREL16_LO which is at low-order half-word. */
7710 rel->r_offset += d_offset;
7711 }
7712 break;
7713
7714 case R_PPC_GOT_TLSGD16_HI:
7715 case R_PPC_GOT_TLSGD16_HA:
7716 tls_gd = TLS_TPRELGD;
7717 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7718 goto tls_gdld_hi;
7719 break;
7720
7721 case R_PPC_GOT_TLSLD16_HI:
7722 case R_PPC_GOT_TLSLD16_HA:
7723 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7724 {
7725 tls_gdld_hi:
7726 if ((tls_mask & tls_gd) != 0)
7727 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7728 + R_PPC_GOT_TPREL16);
7729 else
7730 {
7731 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
7732 rel->r_offset -= d_offset;
7733 r_type = R_PPC_NONE;
7734 }
7735 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7736 }
7737 break;
7738
7739 case R_PPC_GOT_TLSGD16:
7740 case R_PPC_GOT_TLSGD16_LO:
7741 tls_gd = TLS_TPRELGD;
7742 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7743 goto tls_ldgd_opt;
7744 break;
7745
7746 case R_PPC_GOT_TLSLD16:
7747 case R_PPC_GOT_TLSLD16_LO:
7748 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7749 {
7750 unsigned int insn1, insn2;
7751 bfd_vma offset;
7752
7753 tls_ldgd_opt:
7754 offset = (bfd_vma) -1;
7755 /* If not using the newer R_PPC_TLSGD/LD to mark
7756 __tls_get_addr calls, we must trust that the call
7757 stays with its arg setup insns, ie. that the next
7758 reloc is the __tls_get_addr call associated with
7759 the current reloc. Edit both insns. */
7760 if (input_section->has_tls_get_addr_call
7761 && rel + 1 < relend
7762 && branch_reloc_hash_match (input_bfd, rel + 1,
7763 htab->tls_get_addr))
7764 offset = rel[1].r_offset;
7765 if ((tls_mask & tls_gd) != 0)
7766 {
7767 /* IE */
7768 insn1 = bfd_get_32 (output_bfd,
7769 contents + rel->r_offset - d_offset);
7770 insn1 &= (1 << 26) - 1;
7771 insn1 |= 32 << 26; /* lwz */
7772 if (offset != (bfd_vma) -1)
7773 {
7774 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7775 insn2 = 0x7c631214; /* add 3,3,2 */
7776 bfd_put_32 (output_bfd, insn2, contents + offset);
7777 }
7778 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
7779 + R_PPC_GOT_TPREL16);
7780 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7781 }
7782 else
7783 {
7784 /* LE */
7785 insn1 = 0x3c620000; /* addis 3,2,0 */
7786 if (tls_gd == 0)
7787 {
7788 /* Was an LD reloc. */
7789 for (r_symndx = 0;
7790 r_symndx < symtab_hdr->sh_info;
7791 r_symndx++)
7792 if (local_sections[r_symndx] == sec)
7793 break;
7794 if (r_symndx >= symtab_hdr->sh_info)
7795 r_symndx = STN_UNDEF;
7796 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7797 if (r_symndx != STN_UNDEF)
7798 rel->r_addend -= (local_syms[r_symndx].st_value
7799 + sec->output_offset
7800 + sec->output_section->vma);
7801 }
7802 r_type = R_PPC_TPREL16_HA;
7803 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7804 if (offset != (bfd_vma) -1)
7805 {
7806 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7807 rel[1].r_offset = offset + d_offset;
7808 rel[1].r_addend = rel->r_addend;
7809 insn2 = 0x38630000; /* addi 3,3,0 */
7810 bfd_put_32 (output_bfd, insn2, contents + offset);
7811 }
7812 }
7813 bfd_put_32 (output_bfd, insn1,
7814 contents + rel->r_offset - d_offset);
7815 if (tls_gd == 0)
7816 {
7817 /* We changed the symbol on an LD reloc. Start over
7818 in order to get h, sym, sec etc. right. */
7819 rel--;
7820 continue;
7821 }
7822 }
7823 break;
7824
7825 case R_PPC_TLSGD:
7826 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0)
7827 {
7828 unsigned int insn2;
7829 bfd_vma offset = rel->r_offset;
7830
7831 if ((tls_mask & TLS_TPRELGD) != 0)
7832 {
7833 /* IE */
7834 r_type = R_PPC_NONE;
7835 insn2 = 0x7c631214; /* add 3,3,2 */
7836 }
7837 else
7838 {
7839 /* LE */
7840 r_type = R_PPC_TPREL16_LO;
7841 rel->r_offset += d_offset;
7842 insn2 = 0x38630000; /* addi 3,3,0 */
7843 }
7844 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
7845 bfd_put_32 (output_bfd, insn2, contents + offset);
7846 /* Zap the reloc on the _tls_get_addr call too. */
7847 BFD_ASSERT (offset == rel[1].r_offset);
7848 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7849 }
7850 break;
7851
7852 case R_PPC_TLSLD:
7853 if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0)
7854 {
7855 unsigned int insn2;
7856
7857 for (r_symndx = 0;
7858 r_symndx < symtab_hdr->sh_info;
7859 r_symndx++)
7860 if (local_sections[r_symndx] == sec)
7861 break;
7862 if (r_symndx >= symtab_hdr->sh_info)
7863 r_symndx = STN_UNDEF;
7864 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
7865 if (r_symndx != STN_UNDEF)
7866 rel->r_addend -= (local_syms[r_symndx].st_value
7867 + sec->output_offset
7868 + sec->output_section->vma);
7869
7870 rel->r_info = ELF32_R_INFO (r_symndx, R_PPC_TPREL16_LO);
7871 rel->r_offset += d_offset;
7872 insn2 = 0x38630000; /* addi 3,3,0 */
7873 bfd_put_32 (output_bfd, insn2,
7874 contents + rel->r_offset - d_offset);
7875 /* Zap the reloc on the _tls_get_addr call too. */
7876 BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
7877 rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
7878 rel--;
7879 continue;
7880 }
7881 break;
7882 }
7883
7884 /* Handle other relocations that tweak non-addend part of insn. */
7885 branch_bit = 0;
7886 switch (r_type)
7887 {
7888 default:
7889 break;
7890
7891 /* Branch taken prediction relocations. */
7892 case R_PPC_ADDR14_BRTAKEN:
7893 case R_PPC_REL14_BRTAKEN:
7894 branch_bit = BRANCH_PREDICT_BIT;
7895 /* Fall thru */
7896
7897 /* Branch not taken prediction relocations. */
7898 case R_PPC_ADDR14_BRNTAKEN:
7899 case R_PPC_REL14_BRNTAKEN:
7900 {
7901 bfd_vma insn;
7902
7903 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7904 insn &= ~BRANCH_PREDICT_BIT;
7905 insn |= branch_bit;
7906
7907 from = (rel->r_offset
7908 + input_section->output_offset
7909 + input_section->output_section->vma);
7910
7911 /* Invert 'y' bit if not the default. */
7912 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
7913 insn ^= BRANCH_PREDICT_BIT;
7914
7915 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7916 break;
7917 }
7918 }
7919
7920 ifunc = NULL;
7921 if (!htab->is_vxworks)
7922 {
7923 struct plt_entry *ent;
7924
7925 if (h != NULL)
7926 {
7927 if (h->type == STT_GNU_IFUNC)
7928 ifunc = &h->plt.plist;
7929 }
7930 else if (local_got_offsets != NULL
7931 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
7932 {
7933 struct plt_entry **local_plt;
7934
7935 local_plt = (struct plt_entry **) (local_got_offsets
7936 + symtab_hdr->sh_info);
7937 ifunc = local_plt + r_symndx;
7938 }
7939
7940 ent = NULL;
7941 if (ifunc != NULL
7942 && (!info->shared
7943 || is_branch_reloc (r_type)))
7944 {
7945 addend = 0;
7946 if (r_type == R_PPC_PLTREL24 && info->shared)
7947 addend = rel->r_addend;
7948 ent = find_plt_ent (ifunc, got2, addend);
7949 }
7950 if (ent != NULL)
7951 {
7952 if (h == NULL && (ent->plt.offset & 1) == 0)
7953 {
7954 Elf_Internal_Rela rela;
7955 bfd_byte *loc;
7956
7957 rela.r_offset = (htab->iplt->output_section->vma
7958 + htab->iplt->output_offset
7959 + ent->plt.offset);
7960 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
7961 rela.r_addend = relocation;
7962 loc = htab->reliplt->contents;
7963 loc += (htab->reliplt->reloc_count++
7964 * sizeof (Elf32_External_Rela));
7965 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7966
7967 ent->plt.offset |= 1;
7968 }
7969 if (h == NULL && (ent->glink_offset & 1) == 0)
7970 {
7971 unsigned char *p = ((unsigned char *) htab->glink->contents
7972 + ent->glink_offset);
7973 write_glink_stub (ent, htab->iplt, p, info);
7974 ent->glink_offset |= 1;
7975 }
7976
7977 unresolved_reloc = FALSE;
7978 if (htab->plt_type == PLT_NEW
7979 || !htab->elf.dynamic_sections_created
7980 || h == NULL
7981 || h->dynindx == -1)
7982 relocation = (htab->glink->output_section->vma
7983 + htab->glink->output_offset
7984 + (ent->glink_offset & ~1));
7985 else
7986 relocation = (htab->plt->output_section->vma
7987 + htab->plt->output_offset
7988 + ent->plt.offset);
7989 }
7990 }
7991
7992 addend = rel->r_addend;
7993 tls_type = 0;
7994 howto = NULL;
7995 if (r_type < R_PPC_max)
7996 howto = ppc_elf_howto_table[r_type];
7997 switch (r_type)
7998 {
7999 default:
8000 info->callbacks->einfo
8001 (_("%P: %B: unknown relocation type %d for symbol %s\n"),
8002 input_bfd, (int) r_type, sym_name);
8003
8004 bfd_set_error (bfd_error_bad_value);
8005 ret = FALSE;
8006 continue;
8007
8008 case R_PPC_NONE:
8009 case R_PPC_TLS:
8010 case R_PPC_TLSGD:
8011 case R_PPC_TLSLD:
8012 case R_PPC_EMB_MRKREF:
8013 case R_PPC_GNU_VTINHERIT:
8014 case R_PPC_GNU_VTENTRY:
8015 continue;
8016
8017 /* GOT16 relocations. Like an ADDR16 using the symbol's
8018 address in the GOT as relocation value instead of the
8019 symbol's value itself. Also, create a GOT entry for the
8020 symbol and put the symbol value there. */
8021 case R_PPC_GOT_TLSGD16:
8022 case R_PPC_GOT_TLSGD16_LO:
8023 case R_PPC_GOT_TLSGD16_HI:
8024 case R_PPC_GOT_TLSGD16_HA:
8025 tls_type = TLS_TLS | TLS_GD;
8026 goto dogot;
8027
8028 case R_PPC_GOT_TLSLD16:
8029 case R_PPC_GOT_TLSLD16_LO:
8030 case R_PPC_GOT_TLSLD16_HI:
8031 case R_PPC_GOT_TLSLD16_HA:
8032 tls_type = TLS_TLS | TLS_LD;
8033 goto dogot;
8034
8035 case R_PPC_GOT_TPREL16:
8036 case R_PPC_GOT_TPREL16_LO:
8037 case R_PPC_GOT_TPREL16_HI:
8038 case R_PPC_GOT_TPREL16_HA:
8039 tls_type = TLS_TLS | TLS_TPREL;
8040 goto dogot;
8041
8042 case R_PPC_GOT_DTPREL16:
8043 case R_PPC_GOT_DTPREL16_LO:
8044 case R_PPC_GOT_DTPREL16_HI:
8045 case R_PPC_GOT_DTPREL16_HA:
8046 tls_type = TLS_TLS | TLS_DTPREL;
8047 goto dogot;
8048
8049 case R_PPC_GOT16:
8050 case R_PPC_GOT16_LO:
8051 case R_PPC_GOT16_HI:
8052 case R_PPC_GOT16_HA:
8053 tls_mask = 0;
8054 dogot:
8055 {
8056 /* Relocation is to the entry for this symbol in the global
8057 offset table. */
8058 bfd_vma off;
8059 bfd_vma *offp;
8060 unsigned long indx;
8061
8062 if (htab->got == NULL)
8063 abort ();
8064
8065 indx = 0;
8066 if (tls_type == (TLS_TLS | TLS_LD)
8067 && (h == NULL
8068 || !h->def_dynamic))
8069 offp = &htab->tlsld_got.offset;
8070 else if (h != NULL)
8071 {
8072 bfd_boolean dyn;
8073 dyn = htab->elf.dynamic_sections_created;
8074 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
8075 || (info->shared
8076 && SYMBOL_REFERENCES_LOCAL (info, h)))
8077 /* This is actually a static link, or it is a
8078 -Bsymbolic link and the symbol is defined
8079 locally, or the symbol was forced to be local
8080 because of a version file. */
8081 ;
8082 else
8083 {
8084 BFD_ASSERT (h->dynindx != -1);
8085 indx = h->dynindx;
8086 unresolved_reloc = FALSE;
8087 }
8088 offp = &h->got.offset;
8089 }
8090 else
8091 {
8092 if (local_got_offsets == NULL)
8093 abort ();
8094 offp = &local_got_offsets[r_symndx];
8095 }
8096
8097 /* The offset must always be a multiple of 4. We use the
8098 least significant bit to record whether we have already
8099 processed this entry. */
8100 off = *offp;
8101 if ((off & 1) != 0)
8102 off &= ~1;
8103 else
8104 {
8105 unsigned int tls_m = (tls_mask
8106 & (TLS_LD | TLS_GD | TLS_DTPREL
8107 | TLS_TPREL | TLS_TPRELGD));
8108
8109 if (offp == &htab->tlsld_got.offset)
8110 tls_m = TLS_LD;
8111 else if (h == NULL
8112 || !h->def_dynamic)
8113 tls_m &= ~TLS_LD;
8114
8115 /* We might have multiple got entries for this sym.
8116 Initialize them all. */
8117 do
8118 {
8119 int tls_ty = 0;
8120
8121 if ((tls_m & TLS_LD) != 0)
8122 {
8123 tls_ty = TLS_TLS | TLS_LD;
8124 tls_m &= ~TLS_LD;
8125 }
8126 else if ((tls_m & TLS_GD) != 0)
8127 {
8128 tls_ty = TLS_TLS | TLS_GD;
8129 tls_m &= ~TLS_GD;
8130 }
8131 else if ((tls_m & TLS_DTPREL) != 0)
8132 {
8133 tls_ty = TLS_TLS | TLS_DTPREL;
8134 tls_m &= ~TLS_DTPREL;
8135 }
8136 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
8137 {
8138 tls_ty = TLS_TLS | TLS_TPREL;
8139 tls_m = 0;
8140 }
8141
8142 /* Generate relocs for the dynamic linker. */
8143 if ((info->shared || indx != 0)
8144 && (offp == &htab->tlsld_got.offset
8145 || h == NULL
8146 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
8147 || h->root.type != bfd_link_hash_undefweak))
8148 {
8149 asection *rsec = htab->relgot;
8150 bfd_byte * loc;
8151
8152 if (ifunc != NULL)
8153 rsec = htab->reliplt;
8154 outrel.r_offset = (htab->got->output_section->vma
8155 + htab->got->output_offset
8156 + off);
8157 outrel.r_addend = 0;
8158 if (tls_ty & (TLS_LD | TLS_GD))
8159 {
8160 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
8161 if (tls_ty == (TLS_TLS | TLS_GD))
8162 {
8163 loc = rsec->contents;
8164 loc += (rsec->reloc_count++
8165 * sizeof (Elf32_External_Rela));
8166 bfd_elf32_swap_reloca_out (output_bfd,
8167 &outrel, loc);
8168 outrel.r_offset += 4;
8169 outrel.r_info
8170 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8171 }
8172 }
8173 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
8174 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
8175 else if (tls_ty == (TLS_TLS | TLS_TPREL))
8176 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
8177 else if (indx != 0)
8178 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
8179 else if (ifunc != NULL)
8180 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8181 else
8182 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8183 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
8184 {
8185 outrel.r_addend += relocation;
8186 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
8187 outrel.r_addend -= htab->elf.tls_sec->vma;
8188 }
8189 loc = rsec->contents;
8190 loc += (rsec->reloc_count++
8191 * sizeof (Elf32_External_Rela));
8192 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8193 }
8194
8195 /* Init the .got section contents if we're not
8196 emitting a reloc. */
8197 else
8198 {
8199 bfd_vma value = relocation;
8200
8201 if (tls_ty == (TLS_TLS | TLS_LD))
8202 value = 1;
8203 else if (tls_ty != 0)
8204 {
8205 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
8206 if (tls_ty == (TLS_TLS | TLS_TPREL))
8207 value += DTP_OFFSET - TP_OFFSET;
8208
8209 if (tls_ty == (TLS_TLS | TLS_GD))
8210 {
8211 bfd_put_32 (output_bfd, value,
8212 htab->got->contents + off + 4);
8213 value = 1;
8214 }
8215 }
8216 bfd_put_32 (output_bfd, value,
8217 htab->got->contents + off);
8218 }
8219
8220 off += 4;
8221 if (tls_ty & (TLS_LD | TLS_GD))
8222 off += 4;
8223 }
8224 while (tls_m != 0);
8225
8226 off = *offp;
8227 *offp = off | 1;
8228 }
8229
8230 if (off >= (bfd_vma) -2)
8231 abort ();
8232
8233 if ((tls_type & TLS_TLS) != 0)
8234 {
8235 if (tls_type != (TLS_TLS | TLS_LD))
8236 {
8237 if ((tls_mask & TLS_LD) != 0
8238 && !(h == NULL
8239 || !h->def_dynamic))
8240 off += 8;
8241 if (tls_type != (TLS_TLS | TLS_GD))
8242 {
8243 if ((tls_mask & TLS_GD) != 0)
8244 off += 8;
8245 if (tls_type != (TLS_TLS | TLS_DTPREL))
8246 {
8247 if ((tls_mask & TLS_DTPREL) != 0)
8248 off += 4;
8249 }
8250 }
8251 }
8252 }
8253
8254 relocation = (htab->got->output_section->vma
8255 + htab->got->output_offset
8256 + off
8257 - SYM_VAL (htab->elf.hgot));
8258
8259 /* Addends on got relocations don't make much sense.
8260 x+off@got is actually x@got+off, and since the got is
8261 generated by a hash table traversal, the value in the
8262 got at entry m+n bears little relation to the entry m. */
8263 if (addend != 0)
8264 info->callbacks->einfo
8265 (_("%P: %H: non-zero addend on %s reloc against `%s'\n"),
8266 input_bfd, input_section, rel->r_offset,
8267 howto->name,
8268 sym_name);
8269 }
8270 break;
8271
8272 /* Relocations that need no special processing. */
8273 case R_PPC_LOCAL24PC:
8274 /* It makes no sense to point a local relocation
8275 at a symbol not in this object. */
8276 if (unresolved_reloc)
8277 {
8278 if (! (*info->callbacks->undefined_symbol) (info,
8279 h->root.root.string,
8280 input_bfd,
8281 input_section,
8282 rel->r_offset,
8283 TRUE))
8284 return FALSE;
8285 continue;
8286 }
8287 break;
8288
8289 case R_PPC_DTPREL16:
8290 case R_PPC_DTPREL16_LO:
8291 case R_PPC_DTPREL16_HI:
8292 case R_PPC_DTPREL16_HA:
8293 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8294 break;
8295
8296 /* Relocations that may need to be propagated if this is a shared
8297 object. */
8298 case R_PPC_TPREL16:
8299 case R_PPC_TPREL16_LO:
8300 case R_PPC_TPREL16_HI:
8301 case R_PPC_TPREL16_HA:
8302 if (h != NULL
8303 && h->root.type == bfd_link_hash_undefweak
8304 && h->dynindx == -1)
8305 {
8306 /* Make this relocation against an undefined weak symbol
8307 resolve to zero. This is really just a tweak, since
8308 code using weak externs ought to check that they are
8309 defined before using them. */
8310 bfd_byte *p = contents + rel->r_offset - d_offset;
8311 unsigned int insn = bfd_get_32 (output_bfd, p);
8312 insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
8313 if (insn != 0)
8314 bfd_put_32 (output_bfd, insn, p);
8315 break;
8316 }
8317 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8318 /* The TPREL16 relocs shouldn't really be used in shared
8319 libs as they will result in DT_TEXTREL being set, but
8320 support them anyway. */
8321 goto dodyn;
8322
8323 case R_PPC_TPREL32:
8324 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
8325 goto dodyn;
8326
8327 case R_PPC_DTPREL32:
8328 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
8329 goto dodyn;
8330
8331 case R_PPC_DTPMOD32:
8332 relocation = 1;
8333 addend = 0;
8334 goto dodyn;
8335
8336 case R_PPC_REL16:
8337 case R_PPC_REL16_LO:
8338 case R_PPC_REL16_HI:
8339 case R_PPC_REL16_HA:
8340 break;
8341
8342 case R_PPC_REL32:
8343 if (h == NULL || h == htab->elf.hgot)
8344 break;
8345 /* fall through */
8346
8347 case R_PPC_ADDR32:
8348 case R_PPC_ADDR16:
8349 case R_PPC_ADDR16_LO:
8350 case R_PPC_ADDR16_HI:
8351 case R_PPC_ADDR16_HA:
8352 case R_PPC_UADDR32:
8353 case R_PPC_UADDR16:
8354 goto dodyn;
8355
8356 case R_PPC_VLE_REL8:
8357 case R_PPC_VLE_REL15:
8358 case R_PPC_VLE_REL24:
8359 case R_PPC_REL24:
8360 case R_PPC_REL14:
8361 case R_PPC_REL14_BRTAKEN:
8362 case R_PPC_REL14_BRNTAKEN:
8363 /* If these relocations are not to a named symbol, they can be
8364 handled right here, no need to bother the dynamic linker. */
8365 if (SYMBOL_CALLS_LOCAL (info, h)
8366 || h == htab->elf.hgot)
8367 break;
8368 /* fall through */
8369
8370 case R_PPC_ADDR24:
8371 case R_PPC_ADDR14:
8372 case R_PPC_ADDR14_BRTAKEN:
8373 case R_PPC_ADDR14_BRNTAKEN:
8374 if (h != NULL && !info->shared)
8375 break;
8376 /* fall through */
8377
8378 dodyn:
8379 if ((input_section->flags & SEC_ALLOC) == 0
8380 || is_vxworks_tls)
8381 break;
8382
8383 if ((info->shared
8384 && !(h != NULL
8385 && ((h->root.type == bfd_link_hash_undefined
8386 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
8387 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
8388 || (h->root.type == bfd_link_hash_undefweak
8389 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
8390 && (must_be_dyn_reloc (info, r_type)
8391 || !SYMBOL_CALLS_LOCAL (info, h)))
8392 || (ELIMINATE_COPY_RELOCS
8393 && !info->shared
8394 && h != NULL
8395 && h->dynindx != -1
8396 && !h->non_got_ref
8397 && !h->def_regular))
8398 {
8399 int skip;
8400 bfd_byte *loc;
8401 asection *sreloc;
8402 #ifdef DEBUG
8403 fprintf (stderr, "ppc_elf_relocate_section needs to "
8404 "create relocation for %s\n",
8405 (h && h->root.root.string
8406 ? h->root.root.string : "<unknown>"));
8407 #endif
8408
8409 /* When generating a shared object, these relocations
8410 are copied into the output file to be resolved at run
8411 time. */
8412 sreloc = elf_section_data (input_section)->sreloc;
8413 if (ifunc)
8414 sreloc = htab->reliplt;
8415 if (sreloc == NULL)
8416 return FALSE;
8417
8418 skip = 0;
8419 outrel.r_offset = _bfd_elf_section_offset (output_bfd, info,
8420 input_section,
8421 rel->r_offset);
8422 if (outrel.r_offset == (bfd_vma) -1
8423 || outrel.r_offset == (bfd_vma) -2)
8424 skip = (int) outrel.r_offset;
8425 outrel.r_offset += (input_section->output_section->vma
8426 + input_section->output_offset);
8427
8428 if (skip)
8429 memset (&outrel, 0, sizeof outrel);
8430 else if ((h != NULL
8431 && (h->root.type == bfd_link_hash_undefined
8432 || h->root.type == bfd_link_hash_undefweak))
8433 || !SYMBOL_REFERENCES_LOCAL (info, h))
8434 {
8435 BFD_ASSERT (h->dynindx != -1);
8436 unresolved_reloc = FALSE;
8437 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
8438 outrel.r_addend = rel->r_addend;
8439 }
8440 else
8441 {
8442 outrel.r_addend = relocation + rel->r_addend;
8443
8444 if (r_type != R_PPC_ADDR32)
8445 {
8446 long indx = 0;
8447
8448 if (ifunc != NULL)
8449 {
8450 /* If we get here when building a static
8451 executable, then the libc startup function
8452 responsible for applying indirect function
8453 relocations is going to complain about
8454 the reloc type.
8455 If we get here when building a dynamic
8456 executable, it will be because we have
8457 a text relocation. The dynamic loader
8458 will set the text segment writable and
8459 non-executable to apply text relocations.
8460 So we'll segfault when trying to run the
8461 indirection function to resolve the reloc. */
8462 info->callbacks->einfo
8463 (_("%P: %H: relocation %s for indirect "
8464 "function %s unsupported\n"),
8465 input_bfd, input_section, rel->r_offset,
8466 howto->name,
8467 sym_name);
8468 ret = FALSE;
8469 }
8470 else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec))
8471 ;
8472 else if (sec == NULL || sec->owner == NULL)
8473 {
8474 bfd_set_error (bfd_error_bad_value);
8475 ret = FALSE;
8476 }
8477 else
8478 {
8479 asection *osec;
8480
8481 /* We are turning this relocation into one
8482 against a section symbol. It would be
8483 proper to subtract the symbol's value,
8484 osec->vma, from the emitted reloc addend,
8485 but ld.so expects buggy relocs.
8486 FIXME: Why not always use a zero index? */
8487 osec = sec->output_section;
8488 indx = elf_section_data (osec)->dynindx;
8489 if (indx == 0)
8490 {
8491 osec = htab->elf.text_index_section;
8492 indx = elf_section_data (osec)->dynindx;
8493 }
8494 BFD_ASSERT (indx != 0);
8495 #ifdef DEBUG
8496 if (indx == 0)
8497 printf ("indx=%ld section=%s flags=%08x name=%s\n",
8498 indx, osec->name, osec->flags,
8499 h->root.root.string);
8500 #endif
8501 }
8502
8503 outrel.r_info = ELF32_R_INFO (indx, r_type);
8504 }
8505 else if (ifunc != NULL)
8506 outrel.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
8507 else
8508 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
8509 }
8510
8511 loc = sreloc->contents;
8512 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
8513 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
8514
8515 if (skip == -1)
8516 continue;
8517
8518 /* This reloc will be computed at runtime. We clear the memory
8519 so that it contains predictable value. */
8520 if (! skip
8521 && ((input_section->flags & SEC_ALLOC) != 0
8522 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
8523 {
8524 relocation = howto->pc_relative ? outrel.r_offset : 0;
8525 addend = 0;
8526 break;
8527 }
8528 }
8529 break;
8530
8531 case R_PPC_RELAX_PLT:
8532 case R_PPC_RELAX_PLTREL24:
8533 if (h != NULL)
8534 {
8535 struct plt_entry *ent;
8536 bfd_vma got2_addend = 0;
8537
8538 if (r_type == R_PPC_RELAX_PLTREL24)
8539 {
8540 if (info->shared)
8541 got2_addend = addend;
8542 addend = 0;
8543 }
8544 ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
8545 if (htab->plt_type == PLT_NEW)
8546 relocation = (htab->glink->output_section->vma
8547 + htab->glink->output_offset
8548 + ent->glink_offset);
8549 else
8550 relocation = (htab->plt->output_section->vma
8551 + htab->plt->output_offset
8552 + ent->plt.offset);
8553 }
8554 /* Fall thru */
8555
8556 case R_PPC_RELAX:
8557 if (info->shared)
8558 relocation -= (input_section->output_section->vma
8559 + input_section->output_offset
8560 + rel->r_offset - 4);
8561
8562 {
8563 unsigned long t0;
8564 unsigned long t1;
8565
8566 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
8567 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
8568
8569 /* We're clearing the bits for R_PPC_ADDR16_HA
8570 and R_PPC_ADDR16_LO here. */
8571 t0 &= ~0xffff;
8572 t1 &= ~0xffff;
8573
8574 /* t0 is HA, t1 is LO */
8575 relocation += addend;
8576 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
8577 t1 |= relocation & 0xffff;
8578
8579 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
8580 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
8581
8582 /* Rewrite the reloc and convert one of the trailing nop
8583 relocs to describe this relocation. */
8584 BFD_ASSERT (ELF32_R_TYPE (relend[-1].r_info) == R_PPC_NONE);
8585 /* The relocs are at the bottom 2 bytes */
8586 rel[0].r_offset += 2;
8587 memmove (rel + 1, rel, (relend - rel - 1) * sizeof (*rel));
8588 rel[0].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_HA);
8589 rel[1].r_offset += 4;
8590 rel[1].r_info = ELF32_R_INFO (r_symndx, R_PPC_ADDR16_LO);
8591 rel++;
8592 }
8593 continue;
8594
8595 /* Indirect .sdata relocation. */
8596 case R_PPC_EMB_SDAI16:
8597 BFD_ASSERT (htab->sdata[0].section != NULL);
8598 if (!is_static_defined (htab->sdata[0].sym))
8599 {
8600 unresolved_reloc = TRUE;
8601 break;
8602 }
8603 relocation
8604 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
8605 h, relocation, rel);
8606 addend = 0;
8607 break;
8608
8609 /* Indirect .sdata2 relocation. */
8610 case R_PPC_EMB_SDA2I16:
8611 BFD_ASSERT (htab->sdata[1].section != NULL);
8612 if (!is_static_defined (htab->sdata[1].sym))
8613 {
8614 unresolved_reloc = TRUE;
8615 break;
8616 }
8617 relocation
8618 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
8619 h, relocation, rel);
8620 addend = 0;
8621 break;
8622
8623 /* Handle the TOC16 reloc. We want to use the offset within the .got
8624 section, not the actual VMA. This is appropriate when generating
8625 an embedded ELF object, for which the .got section acts like the
8626 AIX .toc section. */
8627 case R_PPC_TOC16: /* phony GOT16 relocations */
8628 if (sec == NULL || sec->output_section == NULL)
8629 {
8630 unresolved_reloc = TRUE;
8631 break;
8632 }
8633 BFD_ASSERT (strcmp (bfd_get_section_name (sec->owner, sec),
8634 ".got") == 0
8635 || strcmp (bfd_get_section_name (sec->owner, sec),
8636 ".cgot") == 0);
8637
8638 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
8639 break;
8640
8641 case R_PPC_PLTREL24:
8642 if (h != NULL && ifunc == NULL)
8643 {
8644 struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
8645 info->shared ? addend : 0);
8646 if (ent == NULL
8647 || htab->plt == NULL)
8648 {
8649 /* We didn't make a PLT entry for this symbol. This
8650 happens when statically linking PIC code, or when
8651 using -Bsymbolic. */
8652 }
8653 else
8654 {
8655 /* Relocation is to the entry for this symbol in the
8656 procedure linkage table. */
8657 unresolved_reloc = FALSE;
8658 if (htab->plt_type == PLT_NEW)
8659 relocation = (htab->glink->output_section->vma
8660 + htab->glink->output_offset
8661 + ent->glink_offset);
8662 else
8663 relocation = (htab->plt->output_section->vma
8664 + htab->plt->output_offset
8665 + ent->plt.offset);
8666 }
8667 }
8668
8669 /* R_PPC_PLTREL24 is rather special. If non-zero, the
8670 addend specifies the GOT pointer offset within .got2.
8671 Don't apply it to the relocation field. */
8672 addend = 0;
8673 break;
8674
8675 /* Relocate against _SDA_BASE_. */
8676 case R_PPC_SDAREL16:
8677 {
8678 const char *name;
8679 struct elf_link_hash_entry *sda = htab->sdata[0].sym;
8680
8681 if (sec == NULL
8682 || sec->output_section == NULL
8683 || !is_static_defined (sda))
8684 {
8685 unresolved_reloc = TRUE;
8686 break;
8687 }
8688 addend -= SYM_VAL (sda);
8689
8690 name = bfd_get_section_name (output_bfd, sec->output_section);
8691 if (! ((CONST_STRNEQ (name, ".sdata")
8692 && (name[6] == 0 || name[6] == '.'))
8693 || (CONST_STRNEQ (name, ".sbss")
8694 && (name[5] == 0 || name[5] == '.'))))
8695 {
8696 info->callbacks->einfo
8697 (_("%P: %B: the target (%s) of a %s relocation is "
8698 "in the wrong output section (%s)\n"),
8699 input_bfd,
8700 sym_name,
8701 howto->name,
8702 name);
8703 }
8704 }
8705 break;
8706
8707 /* Relocate against _SDA2_BASE_. */
8708 case R_PPC_EMB_SDA2REL:
8709 {
8710 const char *name;
8711 struct elf_link_hash_entry *sda = htab->sdata[1].sym;
8712
8713 if (sec == NULL
8714 || sec->output_section == NULL
8715 || !is_static_defined (sda))
8716 {
8717 unresolved_reloc = TRUE;
8718 break;
8719 }
8720 addend -= SYM_VAL (sda);
8721
8722 name = bfd_get_section_name (output_bfd, sec->output_section);
8723 if (! (CONST_STRNEQ (name, ".sdata2")
8724 || CONST_STRNEQ (name, ".sbss2")))
8725 {
8726 info->callbacks->einfo
8727 (_("%P: %B: the target (%s) of a %s relocation is "
8728 "in the wrong output section (%s)\n"),
8729 input_bfd,
8730 sym_name,
8731 howto->name,
8732 name);
8733 }
8734 }
8735 break;
8736
8737 case R_PPC_VLE_LO16A:
8738 relocation = (relocation + addend) & 0xffff;
8739 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8740 relocation, split16a_type);
8741 continue;
8742
8743 case R_PPC_VLE_LO16D:
8744 relocation = (relocation + addend) & 0xffff;
8745 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8746 relocation, split16d_type);
8747 continue;
8748
8749 case R_PPC_VLE_HI16A:
8750 relocation = ((relocation + addend) >> 16) & 0xffff;
8751 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8752 relocation, split16a_type);
8753 continue;
8754
8755 case R_PPC_VLE_HI16D:
8756 relocation = ((relocation + addend) >> 16) & 0xffff;
8757 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8758 relocation, split16d_type);
8759 continue;
8760
8761 case R_PPC_VLE_HA16A:
8762 {
8763 bfd_vma value = relocation + addend;
8764 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8765 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8766 value, split16a_type);
8767 }
8768 continue;
8769
8770 case R_PPC_VLE_HA16D:
8771 {
8772 bfd_vma value = relocation + addend;
8773 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8774 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8775 value, split16d_type);
8776 }
8777 continue;
8778
8779 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
8780 case R_PPC_EMB_SDA21:
8781 case R_PPC_VLE_SDA21:
8782 case R_PPC_EMB_RELSDA:
8783 case R_PPC_VLE_SDA21_LO:
8784 {
8785 const char *name;
8786 int reg;
8787 struct elf_link_hash_entry *sda = NULL;
8788
8789 if (sec == NULL || sec->output_section == NULL)
8790 {
8791 unresolved_reloc = TRUE;
8792 break;
8793 }
8794
8795 name = bfd_get_section_name (output_bfd, sec->output_section);
8796 if (((CONST_STRNEQ (name, ".sdata")
8797 && (name[6] == 0 || name[6] == '.'))
8798 || (CONST_STRNEQ (name, ".sbss")
8799 && (name[5] == 0 || name[5] == '.'))))
8800 {
8801 reg = 13;
8802 sda = htab->sdata[0].sym;
8803 }
8804 else if (CONST_STRNEQ (name, ".sdata2")
8805 || CONST_STRNEQ (name, ".sbss2"))
8806 {
8807 reg = 2;
8808 sda = htab->sdata[1].sym;
8809 }
8810 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
8811 || strcmp (name, ".PPC.EMB.sbss0") == 0)
8812 {
8813 reg = 0;
8814 }
8815 else
8816 {
8817 info->callbacks->einfo
8818 (_("%P: %B: the target (%s) of a %s relocation is "
8819 "in the wrong output section (%s)\n"),
8820 input_bfd,
8821 sym_name,
8822 howto->name,
8823 name);
8824
8825 bfd_set_error (bfd_error_bad_value);
8826 ret = FALSE;
8827 continue;
8828 }
8829
8830 if (sda != NULL)
8831 {
8832 if (!is_static_defined (sda))
8833 {
8834 unresolved_reloc = TRUE;
8835 break;
8836 }
8837 addend -= SYM_VAL (sda);
8838 }
8839
8840 if (reg == 0
8841 && (r_type == R_PPC_VLE_SDA21
8842 || r_type == R_PPC_VLE_SDA21_LO))
8843 {
8844 /* Use the split20 format. */
8845 bfd_vma insn, bits12to15, bits21to31;
8846 bfd_vma value = (relocation + rel->r_offset) & 0xffff;
8847 /* Propagate sign bit, if necessary. */
8848 insn = (value & 0x8000) ? 0x70107800 : 0x70000000;
8849 bits12to15 = value & 0x700;
8850 bits21to31 = value & 0x7ff;
8851 insn |= bits12to15;
8852 insn |= bits21to31;
8853 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8854 continue;
8855 }
8856 else if (r_type == R_PPC_EMB_SDA21
8857 || r_type == R_PPC_VLE_SDA21
8858 || r_type == R_PPC_VLE_SDA21_LO)
8859 {
8860 bfd_vma insn; /* Fill in register field. */
8861
8862 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
8863 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
8864 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
8865 }
8866 }
8867 break;
8868
8869 case R_PPC_VLE_SDAREL_LO16A:
8870 case R_PPC_VLE_SDAREL_LO16D:
8871 case R_PPC_VLE_SDAREL_HI16A:
8872 case R_PPC_VLE_SDAREL_HI16D:
8873 case R_PPC_VLE_SDAREL_HA16A:
8874 case R_PPC_VLE_SDAREL_HA16D:
8875 {
8876 bfd_vma value;
8877 const char *name;
8878 //int reg;
8879 struct elf_link_hash_entry *sda = NULL;
8880
8881 if (sec == NULL || sec->output_section == NULL)
8882 {
8883 unresolved_reloc = TRUE;
8884 break;
8885 }
8886
8887 name = bfd_get_section_name (output_bfd, sec->output_section);
8888 if (((CONST_STRNEQ (name, ".sdata")
8889 && (name[6] == 0 || name[6] == '.'))
8890 || (CONST_STRNEQ (name, ".sbss")
8891 && (name[5] == 0 || name[5] == '.'))))
8892 {
8893 //reg = 13;
8894 sda = htab->sdata[0].sym;
8895 }
8896 else if (CONST_STRNEQ (name, ".sdata2")
8897 || CONST_STRNEQ (name, ".sbss2"))
8898 {
8899 //reg = 2;
8900 sda = htab->sdata[1].sym;
8901 }
8902 else
8903 {
8904 (*_bfd_error_handler)
8905 (_("%B: the target (%s) of a %s relocation is "
8906 "in the wrong output section (%s)"),
8907 input_bfd,
8908 sym_name,
8909 howto->name,
8910 name);
8911
8912 bfd_set_error (bfd_error_bad_value);
8913 ret = FALSE;
8914 continue;
8915 }
8916
8917 if (sda != NULL)
8918 {
8919 if (!is_static_defined (sda))
8920 {
8921 unresolved_reloc = TRUE;
8922 break;
8923 }
8924 }
8925
8926 value = sda->root.u.def.section->output_section->vma
8927 + sda->root.u.def.section->output_offset;
8928
8929 if (r_type == R_PPC_VLE_SDAREL_LO16A)
8930 {
8931 value = (value + addend) & 0xffff;
8932 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8933 value, split16a_type);
8934 }
8935 else if (r_type == R_PPC_VLE_SDAREL_LO16D)
8936 {
8937 value = (value + addend) & 0xffff;
8938 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8939 value, split16d_type);
8940 }
8941 else if (r_type == R_PPC_VLE_SDAREL_HI16A)
8942 {
8943 value = ((value + addend) >> 16) & 0xffff;
8944 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8945 value, split16a_type);
8946 }
8947 else if (r_type == R_PPC_VLE_SDAREL_HI16D)
8948 {
8949 value = ((value + addend) >> 16) & 0xffff;
8950 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8951 value, split16d_type);
8952 }
8953 else if (r_type == R_PPC_VLE_SDAREL_HA16A)
8954 {
8955 value += addend;
8956 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8957 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8958 value, split16a_type);
8959 }
8960 else if (r_type == R_PPC_VLE_SDAREL_HA16D)
8961 {
8962 value += addend;
8963 value = (((value >> 16) + ((value & 0x8000) ? 1 : 0)) & 0xffff);
8964 ppc_elf_vle_split16 (output_bfd, contents, rel->r_offset,
8965 value, split16d_type);
8966 }
8967 }
8968 continue;
8969
8970 /* Relocate against the beginning of the section. */
8971 case R_PPC_SECTOFF:
8972 case R_PPC_SECTOFF_LO:
8973 case R_PPC_SECTOFF_HI:
8974 case R_PPC_SECTOFF_HA:
8975 if (sec == NULL || sec->output_section == NULL)
8976 {
8977 unresolved_reloc = TRUE;
8978 break;
8979 }
8980 addend -= sec->output_section->vma;
8981 break;
8982
8983 /* Negative relocations. */
8984 case R_PPC_EMB_NADDR32:
8985 case R_PPC_EMB_NADDR16:
8986 case R_PPC_EMB_NADDR16_LO:
8987 case R_PPC_EMB_NADDR16_HI:
8988 case R_PPC_EMB_NADDR16_HA:
8989 addend -= 2 * relocation;
8990 break;
8991
8992 case R_PPC_COPY:
8993 case R_PPC_GLOB_DAT:
8994 case R_PPC_JMP_SLOT:
8995 case R_PPC_RELATIVE:
8996 case R_PPC_IRELATIVE:
8997 case R_PPC_PLT32:
8998 case R_PPC_PLTREL32:
8999 case R_PPC_PLT16_LO:
9000 case R_PPC_PLT16_HI:
9001 case R_PPC_PLT16_HA:
9002 case R_PPC_ADDR30:
9003 case R_PPC_EMB_RELSEC16:
9004 case R_PPC_EMB_RELST_LO:
9005 case R_PPC_EMB_RELST_HI:
9006 case R_PPC_EMB_RELST_HA:
9007 case R_PPC_EMB_BIT_FLD:
9008 info->callbacks->einfo
9009 (_("%P: %B: relocation %s is not yet supported for symbol %s\n"),
9010 input_bfd,
9011 howto->name,
9012 sym_name);
9013
9014 bfd_set_error (bfd_error_invalid_operation);
9015 ret = FALSE;
9016 continue;
9017 }
9018
9019 /* Do any further special processing. */
9020 switch (r_type)
9021 {
9022 default:
9023 break;
9024
9025 case R_PPC_ADDR16_HA:
9026 case R_PPC_REL16_HA:
9027 case R_PPC_SECTOFF_HA:
9028 case R_PPC_TPREL16_HA:
9029 case R_PPC_DTPREL16_HA:
9030 case R_PPC_EMB_NADDR16_HA:
9031 case R_PPC_EMB_RELST_HA:
9032 /* It's just possible that this symbol is a weak symbol
9033 that's not actually defined anywhere. In that case,
9034 'sec' would be NULL, and we should leave the symbol
9035 alone (it will be set to zero elsewhere in the link). */
9036 if (sec == NULL)
9037 break;
9038 /* Fall thru */
9039
9040 case R_PPC_PLT16_HA:
9041 case R_PPC_GOT16_HA:
9042 case R_PPC_GOT_TLSGD16_HA:
9043 case R_PPC_GOT_TLSLD16_HA:
9044 case R_PPC_GOT_TPREL16_HA:
9045 case R_PPC_GOT_DTPREL16_HA:
9046 /* Add 0x10000 if sign bit in 0:15 is set.
9047 Bits 0:15 are not used. */
9048 addend += 0x8000;
9049 break;
9050
9051 case R_PPC_ADDR16:
9052 case R_PPC_ADDR16_LO:
9053 case R_PPC_GOT16:
9054 case R_PPC_GOT16_LO:
9055 case R_PPC_SDAREL16:
9056 case R_PPC_SECTOFF:
9057 case R_PPC_SECTOFF_LO:
9058 case R_PPC_DTPREL16:
9059 case R_PPC_DTPREL16_LO:
9060 case R_PPC_TPREL16:
9061 case R_PPC_TPREL16_LO:
9062 case R_PPC_GOT_TLSGD16:
9063 case R_PPC_GOT_TLSGD16_LO:
9064 case R_PPC_GOT_TLSLD16:
9065 case R_PPC_GOT_TLSLD16_LO:
9066 case R_PPC_GOT_DTPREL16:
9067 case R_PPC_GOT_DTPREL16_LO:
9068 case R_PPC_GOT_TPREL16:
9069 case R_PPC_GOT_TPREL16_LO:
9070 {
9071 /* The 32-bit ABI lacks proper relocations to deal with
9072 certain 64-bit instructions. Prevent damage to bits
9073 that make up part of the insn opcode. */
9074 unsigned int insn, mask, lobit;
9075
9076 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
9077 mask = 0;
9078 if (is_insn_ds_form (insn))
9079 mask = 3;
9080 else if (is_insn_dq_form (insn))
9081 mask = 15;
9082 else
9083 break;
9084 lobit = mask & (relocation + addend);
9085 if (lobit != 0)
9086 {
9087 addend -= lobit;
9088 info->callbacks->einfo
9089 (_("%P: %H: error: %s against `%s' not a multiple of %u\n"),
9090 input_bfd, input_section, rel->r_offset,
9091 howto->name, sym_name, mask + 1);
9092 bfd_set_error (bfd_error_bad_value);
9093 ret = FALSE;
9094 }
9095 addend += insn & mask;
9096 }
9097 break;
9098 }
9099
9100 #ifdef DEBUG
9101 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
9102 "offset = %ld, addend = %ld\n",
9103 howto->name,
9104 (int) r_type,
9105 sym_name,
9106 r_symndx,
9107 (long) rel->r_offset,
9108 (long) addend);
9109 #endif
9110
9111 if (unresolved_reloc
9112 && !((input_section->flags & SEC_DEBUGGING) != 0
9113 && h->def_dynamic)
9114 && _bfd_elf_section_offset (output_bfd, info, input_section,
9115 rel->r_offset) != (bfd_vma) -1)
9116 {
9117 info->callbacks->einfo
9118 (_("%P: %H: unresolvable %s relocation against symbol `%s'\n"),
9119 input_bfd, input_section, rel->r_offset,
9120 howto->name,
9121 sym_name);
9122 ret = FALSE;
9123 }
9124
9125 r = _bfd_final_link_relocate (howto,
9126 input_bfd,
9127 input_section,
9128 contents,
9129 rel->r_offset,
9130 relocation,
9131 addend);
9132
9133 if (r != bfd_reloc_ok)
9134 {
9135 if (r == bfd_reloc_overflow)
9136 {
9137 if (warned)
9138 continue;
9139 if (h != NULL
9140 && h->root.type == bfd_link_hash_undefweak
9141 && howto->pc_relative)
9142 {
9143 /* Assume this is a call protected by other code that
9144 detect the symbol is undefined. If this is the case,
9145 we can safely ignore the overflow. If not, the
9146 program is hosed anyway, and a little warning isn't
9147 going to help. */
9148
9149 continue;
9150 }
9151
9152 if (! (*info->callbacks->reloc_overflow) (info,
9153 (h ? &h->root : NULL),
9154 sym_name,
9155 howto->name,
9156 rel->r_addend,
9157 input_bfd,
9158 input_section,
9159 rel->r_offset))
9160 return FALSE;
9161 }
9162 else
9163 {
9164 info->callbacks->einfo
9165 (_("%P: %H: %s reloc against `%s': error %d\n"),
9166 input_bfd, input_section, rel->r_offset,
9167 howto->name, sym_name, (int) r);
9168 ret = FALSE;
9169 }
9170 }
9171 }
9172
9173 #ifdef DEBUG
9174 fprintf (stderr, "\n");
9175 #endif
9176
9177 if (htab->params->ppc476_workaround
9178 && input_section->sec_info_type == SEC_INFO_TYPE_TARGET)
9179 {
9180 struct ppc_elf_relax_info *relax_info;
9181 bfd_vma start_addr, end_addr, addr;
9182 unsigned int pagesize = htab->params->pagesize;
9183
9184 relax_info = elf_section_data (input_section)->sec_info;
9185 if (relax_info->workaround_size != 0)
9186 memset (contents + input_section->size - relax_info->workaround_size,
9187 0, relax_info->workaround_size);
9188
9189 /* The idea is: Replace the last instruction on a page with a
9190 branch to a patch area. Put the insn there followed by a
9191 branch back to the next page. Complicated a little by
9192 needing to handle moved conditional branches, and by not
9193 wanting to touch data-in-text. */
9194
9195 start_addr = (input_section->output_section->vma
9196 + input_section->output_offset);
9197 end_addr = (start_addr + input_section->size
9198 - relax_info->workaround_size);
9199 for (addr = ((start_addr & -pagesize) + pagesize - 4);
9200 addr < end_addr;
9201 addr += pagesize)
9202 {
9203 bfd_vma offset = addr - start_addr;
9204 Elf_Internal_Rela *lo, *hi;
9205 bfd_boolean is_data;
9206 bfd_vma patch_off, patch_addr;
9207 unsigned int insn;
9208
9209 /* Do we have a data reloc at this offset? If so, leave
9210 the word alone. */
9211 is_data = FALSE;
9212 lo = relocs;
9213 hi = lo + input_section->reloc_count;
9214 while (lo < hi)
9215 {
9216 rel = lo + (hi - lo) / 2;
9217 if (rel->r_offset < offset)
9218 lo = rel + 1;
9219 else if (rel->r_offset > offset)
9220 hi = rel;
9221 else
9222 {
9223 switch (ELF32_R_TYPE (rel->r_info))
9224 {
9225 case R_PPC_ADDR32:
9226 case R_PPC_UADDR32:
9227 case R_PPC_REL32:
9228 case R_PPC_ADDR30:
9229 is_data = TRUE;
9230 break;
9231 default:
9232 break;
9233 }
9234 break;
9235 }
9236 }
9237 if (is_data)
9238 continue;
9239
9240 /* Some instructions can be left alone too. In this
9241 category are most insns that unconditionally change
9242 control flow, and isync. Of these, some *must* be left
9243 alone, for example, the "bcl 20, 31, label" used in pic
9244 sequences to give the address of the next insn. twui
9245 and twu apparently are not safe. */
9246 insn = bfd_get_32 (input_bfd, contents + offset);
9247 if (insn == 0
9248 || (insn & (0x3f << 26)) == (18u << 26) /* b */
9249 || ((insn & (0x3f << 26)) == (16u << 26) /* bc always */
9250 && (insn & (0x14 << 21)) == (0x14 << 21))
9251 || ((insn & (0x3f << 26)) == (19u << 26) /* blr, bctr */
9252 && (insn & (0x14 << 21)) == (0x14 << 21)
9253 && (insn & (0x1ff << 1)) == (16u << 1))
9254 || (insn & (0x3f << 26)) == (17u << 26) /* sc */
9255 || ((insn & (0x3f << 26)) == (19u << 26)
9256 && ((insn & (0x3ff << 1)) == (38u << 1) /* rfmci */
9257 || (insn & (0x3ff << 1)) == (50u << 1) /* rfi */
9258 || (insn & (0x3ff << 1)) == (51u << 1) /* rfci */
9259 || (insn & (0x3ff << 1)) == (82u << 1) /* rfsvc */
9260 || (insn & (0x3ff << 1)) == (150u << 1))) /* isync */)
9261 continue;
9262
9263 patch_addr = (start_addr + input_section->size
9264 - relax_info->workaround_size);
9265 patch_addr = (patch_addr + 15) & -16;
9266 patch_off = patch_addr - start_addr;
9267 bfd_put_32 (input_bfd, B + patch_off - offset, contents + offset);
9268 if ((insn & (0x3f << 26)) == (16u << 26) /* bc */
9269 && (insn & 2) == 0 /* relative */)
9270 {
9271 bfd_vma delta = ((insn & 0xfffc) ^ 0x8000) - 0x8000;
9272
9273 delta += offset - patch_off;
9274 if (delta + 0x8000 < 0x10000)
9275 {
9276 bfd_put_32 (input_bfd,
9277 (insn & ~0xfffc) | (delta & 0xfffc),
9278 contents + patch_off);
9279 patch_off += 4;
9280 bfd_put_32 (input_bfd,
9281 B | ((offset + 4 - patch_off) & 0x3fffffc),
9282 contents + patch_off);
9283 patch_off += 4;
9284 }
9285 else
9286 {
9287 bfd_put_32 (input_bfd,
9288 (insn & ~0xfffc) | 8,
9289 contents + patch_off);
9290 patch_off += 4;
9291 bfd_put_32 (input_bfd,
9292 B | ((offset + 4 - patch_off) & 0x3fffffc),
9293 contents + patch_off);
9294 patch_off += 4;
9295 bfd_put_32 (input_bfd,
9296 B | ((delta - 8) & 0x3fffffc),
9297 contents + patch_off);
9298 patch_off += 4;
9299 }
9300 }
9301 else
9302 {
9303 bfd_put_32 (input_bfd, insn, contents + patch_off);
9304 patch_off += 4;
9305 bfd_put_32 (input_bfd,
9306 B | ((offset + 4 - patch_off) & 0x3fffffc),
9307 contents + patch_off);
9308 patch_off += 4;
9309 }
9310 BFD_ASSERT (patch_off <= input_section->size);
9311 relax_info->workaround_size = input_section->size - patch_off;
9312 }
9313 }
9314
9315 return ret;
9316 }
9317 \f
9318 /* Finish up dynamic symbol handling. We set the contents of various
9319 dynamic sections here. */
9320
9321 static bfd_boolean
9322 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
9323 struct bfd_link_info *info,
9324 struct elf_link_hash_entry *h,
9325 Elf_Internal_Sym *sym)
9326 {
9327 struct ppc_elf_link_hash_table *htab;
9328 struct plt_entry *ent;
9329 bfd_boolean doneone;
9330
9331 #ifdef DEBUG
9332 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
9333 h->root.root.string);
9334 #endif
9335
9336 htab = ppc_elf_hash_table (info);
9337 BFD_ASSERT (htab->elf.dynobj != NULL);
9338
9339 doneone = FALSE;
9340 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
9341 if (ent->plt.offset != (bfd_vma) -1)
9342 {
9343 if (!doneone)
9344 {
9345 Elf_Internal_Rela rela;
9346 bfd_byte *loc;
9347 bfd_vma reloc_index;
9348
9349 if (htab->plt_type == PLT_NEW
9350 || !htab->elf.dynamic_sections_created
9351 || h->dynindx == -1)
9352 reloc_index = ent->plt.offset / 4;
9353 else
9354 {
9355 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
9356 / htab->plt_slot_size);
9357 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
9358 && htab->plt_type == PLT_OLD)
9359 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
9360 }
9361
9362 /* This symbol has an entry in the procedure linkage table.
9363 Set it up. */
9364 if (htab->plt_type == PLT_VXWORKS
9365 && htab->elf.dynamic_sections_created
9366 && h->dynindx != -1)
9367 {
9368 bfd_vma got_offset;
9369 const bfd_vma *plt_entry;
9370
9371 /* The first three entries in .got.plt are reserved. */
9372 got_offset = (reloc_index + 3) * 4;
9373
9374 /* Use the right PLT. */
9375 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
9376 : ppc_elf_vxworks_plt_entry;
9377
9378 /* Fill in the .plt on VxWorks. */
9379 if (info->shared)
9380 {
9381 bfd_put_32 (output_bfd,
9382 plt_entry[0] | PPC_HA (got_offset),
9383 htab->plt->contents + ent->plt.offset + 0);
9384 bfd_put_32 (output_bfd,
9385 plt_entry[1] | PPC_LO (got_offset),
9386 htab->plt->contents + ent->plt.offset + 4);
9387 }
9388 else
9389 {
9390 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
9391
9392 bfd_put_32 (output_bfd,
9393 plt_entry[0] | PPC_HA (got_loc),
9394 htab->plt->contents + ent->plt.offset + 0);
9395 bfd_put_32 (output_bfd,
9396 plt_entry[1] | PPC_LO (got_loc),
9397 htab->plt->contents + ent->plt.offset + 4);
9398 }
9399
9400 bfd_put_32 (output_bfd, plt_entry[2],
9401 htab->plt->contents + ent->plt.offset + 8);
9402 bfd_put_32 (output_bfd, plt_entry[3],
9403 htab->plt->contents + ent->plt.offset + 12);
9404
9405 /* This instruction is an immediate load. The value loaded is
9406 the byte offset of the R_PPC_JMP_SLOT relocation from the
9407 start of the .rela.plt section. The value is stored in the
9408 low-order 16 bits of the load instruction. */
9409 /* NOTE: It appears that this is now an index rather than a
9410 prescaled offset. */
9411 bfd_put_32 (output_bfd,
9412 plt_entry[4] | reloc_index,
9413 htab->plt->contents + ent->plt.offset + 16);
9414 /* This instruction is a PC-relative branch whose target is
9415 the start of the PLT section. The address of this branch
9416 instruction is 20 bytes beyond the start of this PLT entry.
9417 The address is encoded in bits 6-29, inclusive. The value
9418 stored is right-shifted by two bits, permitting a 26-bit
9419 offset. */
9420 bfd_put_32 (output_bfd,
9421 (plt_entry[5]
9422 | (-(ent->plt.offset + 20) & 0x03fffffc)),
9423 htab->plt->contents + ent->plt.offset + 20);
9424 bfd_put_32 (output_bfd, plt_entry[6],
9425 htab->plt->contents + ent->plt.offset + 24);
9426 bfd_put_32 (output_bfd, plt_entry[7],
9427 htab->plt->contents + ent->plt.offset + 28);
9428
9429 /* Fill in the GOT entry corresponding to this PLT slot with
9430 the address immediately after the "bctr" instruction
9431 in this PLT entry. */
9432 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
9433 + htab->plt->output_offset
9434 + ent->plt.offset + 16),
9435 htab->sgotplt->contents + got_offset);
9436
9437 if (!info->shared)
9438 {
9439 /* Fill in a couple of entries in .rela.plt.unloaded. */
9440 loc = htab->srelplt2->contents
9441 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
9442 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
9443 * sizeof (Elf32_External_Rela));
9444
9445 /* Provide the @ha relocation for the first instruction. */
9446 rela.r_offset = (htab->plt->output_section->vma
9447 + htab->plt->output_offset
9448 + ent->plt.offset + 2);
9449 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9450 R_PPC_ADDR16_HA);
9451 rela.r_addend = got_offset;
9452 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9453 loc += sizeof (Elf32_External_Rela);
9454
9455 /* Provide the @l relocation for the second instruction. */
9456 rela.r_offset = (htab->plt->output_section->vma
9457 + htab->plt->output_offset
9458 + ent->plt.offset + 6);
9459 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
9460 R_PPC_ADDR16_LO);
9461 rela.r_addend = got_offset;
9462 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9463 loc += sizeof (Elf32_External_Rela);
9464
9465 /* Provide a relocation for the GOT entry corresponding to this
9466 PLT slot. Point it at the middle of the .plt entry. */
9467 rela.r_offset = (htab->sgotplt->output_section->vma
9468 + htab->sgotplt->output_offset
9469 + got_offset);
9470 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
9471 R_PPC_ADDR32);
9472 rela.r_addend = ent->plt.offset + 16;
9473 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9474 }
9475
9476 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
9477 In particular, the offset for the relocation is not the
9478 address of the PLT entry for this function, as specified
9479 by the ABI. Instead, the offset is set to the address of
9480 the GOT slot for this function. See EABI 4.4.4.1. */
9481 rela.r_offset = (htab->sgotplt->output_section->vma
9482 + htab->sgotplt->output_offset
9483 + got_offset);
9484
9485 }
9486 else
9487 {
9488 asection *splt = htab->plt;
9489 if (!htab->elf.dynamic_sections_created
9490 || h->dynindx == -1)
9491 splt = htab->iplt;
9492
9493 rela.r_offset = (splt->output_section->vma
9494 + splt->output_offset
9495 + ent->plt.offset);
9496 if (htab->plt_type == PLT_OLD
9497 || !htab->elf.dynamic_sections_created
9498 || h->dynindx == -1)
9499 {
9500 /* We don't need to fill in the .plt. The ppc dynamic
9501 linker will fill it in. */
9502 }
9503 else
9504 {
9505 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
9506 + htab->glink->output_section->vma
9507 + htab->glink->output_offset);
9508 bfd_put_32 (output_bfd, val,
9509 splt->contents + ent->plt.offset);
9510 }
9511 }
9512
9513 /* Fill in the entry in the .rela.plt section. */
9514 rela.r_addend = 0;
9515 if (!htab->elf.dynamic_sections_created
9516 || h->dynindx == -1)
9517 {
9518 BFD_ASSERT (h->type == STT_GNU_IFUNC
9519 && h->def_regular
9520 && (h->root.type == bfd_link_hash_defined
9521 || h->root.type == bfd_link_hash_defweak));
9522 rela.r_info = ELF32_R_INFO (0, R_PPC_IRELATIVE);
9523 rela.r_addend = SYM_VAL (h);
9524 }
9525 else
9526 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
9527
9528 if (!htab->elf.dynamic_sections_created
9529 || h->dynindx == -1)
9530 loc = (htab->reliplt->contents
9531 + (htab->reliplt->reloc_count++
9532 * sizeof (Elf32_External_Rela)));
9533 else
9534 loc = (htab->relplt->contents
9535 + reloc_index * sizeof (Elf32_External_Rela));
9536 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9537
9538 if (!h->def_regular)
9539 {
9540 /* Mark the symbol as undefined, rather than as
9541 defined in the .plt section. Leave the value if
9542 there were any relocations where pointer equality
9543 matters (this is a clue for the dynamic linker, to
9544 make function pointer comparisons work between an
9545 application and shared library), otherwise set it
9546 to zero. */
9547 sym->st_shndx = SHN_UNDEF;
9548 if (!h->pointer_equality_needed)
9549 sym->st_value = 0;
9550 else if (!h->ref_regular_nonweak)
9551 {
9552 /* This breaks function pointer comparisons, but
9553 that is better than breaking tests for a NULL
9554 function pointer. */
9555 sym->st_value = 0;
9556 }
9557 }
9558 else if (h->type == STT_GNU_IFUNC
9559 && !info->shared)
9560 {
9561 /* Set the value of ifunc symbols in a non-pie
9562 executable to the glink entry. This is to avoid
9563 text relocations. We can't do this for ifunc in
9564 allocate_dynrelocs, as we do for normal dynamic
9565 function symbols with plt entries, because we need
9566 to keep the original value around for the ifunc
9567 relocation. */
9568 sym->st_shndx = (_bfd_elf_section_from_bfd_section
9569 (output_bfd, htab->glink->output_section));
9570 sym->st_value = (ent->glink_offset
9571 + htab->glink->output_offset
9572 + htab->glink->output_section->vma);
9573 }
9574 doneone = TRUE;
9575 }
9576
9577 if (htab->plt_type == PLT_NEW
9578 || !htab->elf.dynamic_sections_created
9579 || h->dynindx == -1)
9580 {
9581 unsigned char *p;
9582 asection *splt = htab->plt;
9583 if (!htab->elf.dynamic_sections_created
9584 || h->dynindx == -1)
9585 splt = htab->iplt;
9586
9587 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
9588
9589 if (h == htab->tls_get_addr && !htab->params->no_tls_get_addr_opt)
9590 {
9591 bfd_put_32 (output_bfd, LWZ_11_3, p);
9592 p += 4;
9593 bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
9594 p += 4;
9595 bfd_put_32 (output_bfd, MR_0_3, p);
9596 p += 4;
9597 bfd_put_32 (output_bfd, CMPWI_11_0, p);
9598 p += 4;
9599 bfd_put_32 (output_bfd, ADD_3_12_2, p);
9600 p += 4;
9601 bfd_put_32 (output_bfd, BEQLR, p);
9602 p += 4;
9603 bfd_put_32 (output_bfd, MR_3_0, p);
9604 p += 4;
9605 bfd_put_32 (output_bfd, NOP, p);
9606 p += 4;
9607 }
9608
9609 write_glink_stub (ent, splt, p, info);
9610
9611 if (!info->shared)
9612 /* We only need one non-PIC glink stub. */
9613 break;
9614 }
9615 else
9616 break;
9617 }
9618
9619 if (h->needs_copy)
9620 {
9621 asection *s;
9622 Elf_Internal_Rela rela;
9623 bfd_byte *loc;
9624
9625 /* This symbols needs a copy reloc. Set it up. */
9626
9627 #ifdef DEBUG
9628 fprintf (stderr, ", copy");
9629 #endif
9630
9631 BFD_ASSERT (h->dynindx != -1);
9632
9633 if (ppc_elf_hash_entry (h)->has_sda_refs)
9634 s = htab->relsbss;
9635 else
9636 s = htab->relbss;
9637 BFD_ASSERT (s != NULL);
9638
9639 rela.r_offset = SYM_VAL (h);
9640 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
9641 rela.r_addend = 0;
9642 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
9643 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9644 }
9645
9646 #ifdef DEBUG
9647 fprintf (stderr, "\n");
9648 #endif
9649
9650 return TRUE;
9651 }
9652 \f
9653 static enum elf_reloc_type_class
9654 ppc_elf_reloc_type_class (const struct bfd_link_info *info,
9655 const asection *rel_sec,
9656 const Elf_Internal_Rela *rela)
9657 {
9658 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
9659
9660 if (rel_sec == htab->reliplt)
9661 return reloc_class_ifunc;
9662
9663 switch (ELF32_R_TYPE (rela->r_info))
9664 {
9665 case R_PPC_RELATIVE:
9666 return reloc_class_relative;
9667 case R_PPC_JMP_SLOT:
9668 return reloc_class_plt;
9669 case R_PPC_COPY:
9670 return reloc_class_copy;
9671 default:
9672 return reloc_class_normal;
9673 }
9674 }
9675 \f
9676 /* Finish up the dynamic sections. */
9677
9678 static bfd_boolean
9679 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
9680 struct bfd_link_info *info)
9681 {
9682 asection *sdyn;
9683 asection *splt;
9684 struct ppc_elf_link_hash_table *htab;
9685 bfd_vma got;
9686 bfd *dynobj;
9687 bfd_boolean ret = TRUE;
9688
9689 #ifdef DEBUG
9690 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
9691 #endif
9692
9693 htab = ppc_elf_hash_table (info);
9694 dynobj = elf_hash_table (info)->dynobj;
9695 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
9696 if (htab->is_vxworks)
9697 splt = bfd_get_linker_section (dynobj, ".plt");
9698 else
9699 splt = NULL;
9700
9701 got = 0;
9702 if (htab->elf.hgot != NULL)
9703 got = SYM_VAL (htab->elf.hgot);
9704
9705 if (htab->elf.dynamic_sections_created)
9706 {
9707 Elf32_External_Dyn *dyncon, *dynconend;
9708
9709 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
9710
9711 dyncon = (Elf32_External_Dyn *) sdyn->contents;
9712 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
9713 for (; dyncon < dynconend; dyncon++)
9714 {
9715 Elf_Internal_Dyn dyn;
9716 asection *s;
9717
9718 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
9719
9720 switch (dyn.d_tag)
9721 {
9722 case DT_PLTGOT:
9723 if (htab->is_vxworks)
9724 s = htab->sgotplt;
9725 else
9726 s = htab->plt;
9727 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9728 break;
9729
9730 case DT_PLTRELSZ:
9731 dyn.d_un.d_val = htab->relplt->size;
9732 break;
9733
9734 case DT_JMPREL:
9735 s = htab->relplt;
9736 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
9737 break;
9738
9739 case DT_PPC_GOT:
9740 dyn.d_un.d_ptr = got;
9741 break;
9742
9743 case DT_RELASZ:
9744 if (htab->is_vxworks)
9745 {
9746 if (htab->relplt)
9747 dyn.d_un.d_ptr -= htab->relplt->size;
9748 break;
9749 }
9750 continue;
9751
9752 default:
9753 if (htab->is_vxworks
9754 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
9755 break;
9756 continue;
9757 }
9758
9759 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
9760 }
9761 }
9762
9763 if (htab->got != NULL)
9764 {
9765 if (htab->elf.hgot->root.u.def.section == htab->got
9766 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
9767 {
9768 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
9769
9770 p += htab->elf.hgot->root.u.def.value;
9771 if (htab->plt_type == PLT_OLD)
9772 {
9773 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
9774 so that a function can easily find the address of
9775 _GLOBAL_OFFSET_TABLE_. */
9776 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
9777 < htab->elf.hgot->root.u.def.section->size);
9778 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
9779 }
9780
9781 if (sdyn != NULL)
9782 {
9783 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
9784 BFD_ASSERT (htab->elf.hgot->root.u.def.value
9785 < htab->elf.hgot->root.u.def.section->size);
9786 bfd_put_32 (output_bfd, val, p);
9787 }
9788 }
9789 else
9790 {
9791 info->callbacks->einfo (_("%P: %s not defined in linker created %s\n"),
9792 htab->elf.hgot->root.root.string,
9793 (htab->sgotplt != NULL
9794 ? htab->sgotplt->name : htab->got->name));
9795 bfd_set_error (bfd_error_bad_value);
9796 ret = FALSE;
9797 }
9798
9799 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
9800 }
9801
9802 /* Fill in the first entry in the VxWorks procedure linkage table. */
9803 if (splt && splt->size > 0)
9804 {
9805 /* Use the right PLT. */
9806 const bfd_vma *plt_entry = (info->shared
9807 ? ppc_elf_vxworks_pic_plt0_entry
9808 : ppc_elf_vxworks_plt0_entry);
9809
9810 if (!info->shared)
9811 {
9812 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
9813
9814 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
9815 splt->contents + 0);
9816 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
9817 splt->contents + 4);
9818 }
9819 else
9820 {
9821 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
9822 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
9823 }
9824 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
9825 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
9826 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
9827 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
9828 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
9829 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
9830
9831 if (! info->shared)
9832 {
9833 Elf_Internal_Rela rela;
9834 bfd_byte *loc;
9835
9836 loc = htab->srelplt2->contents;
9837
9838 /* Output the @ha relocation for the first instruction. */
9839 rela.r_offset = (htab->plt->output_section->vma
9840 + htab->plt->output_offset
9841 + 2);
9842 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9843 rela.r_addend = 0;
9844 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9845 loc += sizeof (Elf32_External_Rela);
9846
9847 /* Output the @l relocation for the second instruction. */
9848 rela.r_offset = (htab->plt->output_section->vma
9849 + htab->plt->output_offset
9850 + 6);
9851 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9852 rela.r_addend = 0;
9853 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
9854 loc += sizeof (Elf32_External_Rela);
9855
9856 /* Fix up the remaining relocations. They may have the wrong
9857 symbol index for _G_O_T_ or _P_L_T_ depending on the order
9858 in which symbols were output. */
9859 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
9860 {
9861 Elf_Internal_Rela rel;
9862
9863 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9864 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
9865 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9866 loc += sizeof (Elf32_External_Rela);
9867
9868 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9869 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
9870 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9871 loc += sizeof (Elf32_External_Rela);
9872
9873 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
9874 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
9875 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
9876 loc += sizeof (Elf32_External_Rela);
9877 }
9878 }
9879 }
9880
9881 if (htab->glink != NULL
9882 && htab->glink->contents != NULL
9883 && htab->elf.dynamic_sections_created)
9884 {
9885 unsigned char *p;
9886 unsigned char *endp;
9887 bfd_vma res0;
9888 unsigned int i;
9889
9890 /*
9891 * PIC glink code is the following:
9892 *
9893 * # ith PLT code stub.
9894 * addis 11,30,(plt+(i-1)*4-got)@ha
9895 * lwz 11,(plt+(i-1)*4-got)@l(11)
9896 * mtctr 11
9897 * bctr
9898 *
9899 * # A table of branches, one for each plt entry.
9900 * # The idea is that the plt call stub loads ctr and r11 with these
9901 * # addresses, so (r11 - res_0) gives the plt index * 4.
9902 * res_0: b PLTresolve
9903 * res_1: b PLTresolve
9904 * .
9905 * # Some number of entries towards the end can be nops
9906 * res_n_m3: nop
9907 * res_n_m2: nop
9908 * res_n_m1:
9909 *
9910 * PLTresolve:
9911 * addis 11,11,(1f-res_0)@ha
9912 * mflr 0
9913 * bcl 20,31,1f
9914 * 1: addi 11,11,(1b-res_0)@l
9915 * mflr 12
9916 * mtlr 0
9917 * sub 11,11,12 # r11 = index * 4
9918 * addis 12,12,(got+4-1b)@ha
9919 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
9920 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
9921 * mtctr 0
9922 * add 0,11,11
9923 * add 11,0,11 # r11 = index * 12 = reloc offset.
9924 * bctr
9925 */
9926 static const unsigned int pic_plt_resolve[] =
9927 {
9928 ADDIS_11_11,
9929 MFLR_0,
9930 BCL_20_31,
9931 ADDI_11_11,
9932 MFLR_12,
9933 MTLR_0,
9934 SUB_11_11_12,
9935 ADDIS_12_12,
9936 LWZ_0_12,
9937 LWZ_12_12,
9938 MTCTR_0,
9939 ADD_0_11_11,
9940 ADD_11_0_11,
9941 BCTR,
9942 NOP,
9943 NOP
9944 };
9945
9946 /*
9947 * Non-PIC glink code is a little simpler.
9948 *
9949 * # ith PLT code stub.
9950 * lis 11,(plt+(i-1)*4)@ha
9951 * lwz 11,(plt+(i-1)*4)@l(11)
9952 * mtctr 11
9953 * bctr
9954 *
9955 * The branch table is the same, then comes
9956 *
9957 * PLTresolve:
9958 * lis 12,(got+4)@ha
9959 * addis 11,11,(-res_0)@ha
9960 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
9961 * addi 11,11,(-res_0)@l # r11 = index * 4
9962 * mtctr 0
9963 * add 0,11,11
9964 * lwz 12,(got+8)@l(12) # got[2] contains the map address
9965 * add 11,0,11 # r11 = index * 12 = reloc offset.
9966 * bctr
9967 */
9968 static const unsigned int plt_resolve[] =
9969 {
9970 LIS_12,
9971 ADDIS_11_11,
9972 LWZ_0_12,
9973 ADDI_11_11,
9974 MTCTR_0,
9975 ADD_0_11_11,
9976 LWZ_12_12,
9977 ADD_11_0_11,
9978 BCTR,
9979 NOP,
9980 NOP,
9981 NOP,
9982 NOP,
9983 NOP,
9984 NOP,
9985 NOP
9986 };
9987
9988 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
9989 abort ();
9990 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
9991 abort ();
9992
9993 /* Build the branch table, one for each plt entry (less one),
9994 and perhaps some padding. */
9995 p = htab->glink->contents;
9996 p += htab->glink_pltresolve;
9997 endp = htab->glink->contents;
9998 endp += htab->glink->size - GLINK_PLTRESOLVE;
9999 while (p < endp - 8 * 4)
10000 {
10001 bfd_put_32 (output_bfd, B + endp - p, p);
10002 p += 4;
10003 }
10004 while (p < endp)
10005 {
10006 bfd_put_32 (output_bfd, NOP, p);
10007 p += 4;
10008 }
10009
10010 res0 = (htab->glink_pltresolve
10011 + htab->glink->output_section->vma
10012 + htab->glink->output_offset);
10013
10014 /* Last comes the PLTresolve stub. */
10015 if (info->shared)
10016 {
10017 bfd_vma bcl;
10018
10019 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
10020 {
10021 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
10022 p += 4;
10023 }
10024 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
10025
10026 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
10027 + htab->glink->output_section->vma
10028 + htab->glink->output_offset);
10029
10030 bfd_put_32 (output_bfd,
10031 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
10032 bfd_put_32 (output_bfd,
10033 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
10034 bfd_put_32 (output_bfd,
10035 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
10036 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
10037 {
10038 bfd_put_32 (output_bfd,
10039 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10040 bfd_put_32 (output_bfd,
10041 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
10042 }
10043 else
10044 {
10045 bfd_put_32 (output_bfd,
10046 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
10047 bfd_put_32 (output_bfd,
10048 LWZ_12_12 + 4, p + 9*4);
10049 }
10050 }
10051 else
10052 {
10053 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
10054 {
10055 bfd_put_32 (output_bfd, plt_resolve[i], p);
10056 p += 4;
10057 }
10058 p -= 4 * ARRAY_SIZE (plt_resolve);
10059
10060 bfd_put_32 (output_bfd,
10061 LIS_12 + PPC_HA (got + 4), p + 0*4);
10062 bfd_put_32 (output_bfd,
10063 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
10064 bfd_put_32 (output_bfd,
10065 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
10066 if (PPC_HA (got + 4) == PPC_HA (got + 8))
10067 {
10068 bfd_put_32 (output_bfd,
10069 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
10070 bfd_put_32 (output_bfd,
10071 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
10072 }
10073 else
10074 {
10075 bfd_put_32 (output_bfd,
10076 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
10077 bfd_put_32 (output_bfd,
10078 LWZ_12_12 + 4, p + 6*4);
10079 }
10080 }
10081 }
10082
10083 if (htab->glink_eh_frame != NULL
10084 && htab->glink_eh_frame->contents != NULL)
10085 {
10086 unsigned char *p = htab->glink_eh_frame->contents;
10087 bfd_vma val;
10088
10089 p += sizeof (glink_eh_frame_cie);
10090 /* FDE length. */
10091 p += 4;
10092 /* CIE pointer. */
10093 p += 4;
10094 /* Offset to .glink. */
10095 val = (htab->glink->output_section->vma
10096 + htab->glink->output_offset);
10097 val -= (htab->glink_eh_frame->output_section->vma
10098 + htab->glink_eh_frame->output_offset);
10099 val -= p - htab->glink_eh_frame->contents;
10100 bfd_put_32 (htab->elf.dynobj, val, p);
10101
10102 if (htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME
10103 && !_bfd_elf_write_section_eh_frame (output_bfd, info,
10104 htab->glink_eh_frame,
10105 htab->glink_eh_frame->contents))
10106 return FALSE;
10107 }
10108
10109 return ret;
10110 }
10111 \f
10112 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
10113 #define TARGET_LITTLE_NAME "elf32-powerpcle"
10114 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
10115 #define TARGET_BIG_NAME "elf32-powerpc"
10116 #define ELF_ARCH bfd_arch_powerpc
10117 #define ELF_TARGET_ID PPC32_ELF_DATA
10118 #define ELF_MACHINE_CODE EM_PPC
10119 #ifdef __QNXTARGET__
10120 #define ELF_MAXPAGESIZE 0x1000
10121 #else
10122 #define ELF_MAXPAGESIZE 0x10000
10123 #endif
10124 #define ELF_MINPAGESIZE 0x1000
10125 #define ELF_COMMONPAGESIZE 0x1000
10126 #define elf_info_to_howto ppc_elf_info_to_howto
10127
10128 #ifdef EM_CYGNUS_POWERPC
10129 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
10130 #endif
10131
10132 #ifdef EM_PPC_OLD
10133 #define ELF_MACHINE_ALT2 EM_PPC_OLD
10134 #endif
10135
10136 #define elf_backend_plt_not_loaded 1
10137 #define elf_backend_can_gc_sections 1
10138 #define elf_backend_can_refcount 1
10139 #define elf_backend_rela_normal 1
10140
10141 #define bfd_elf32_mkobject ppc_elf_mkobject
10142 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
10143 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
10144 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
10145 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
10146 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
10147 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
10148 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
10149
10150 #define elf_backend_object_p ppc_elf_object_p
10151 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
10152 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
10153 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
10154 #define elf_backend_relocate_section ppc_elf_relocate_section
10155 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
10156 #define elf_backend_check_relocs ppc_elf_check_relocs
10157 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
10158 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
10159 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
10160 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
10161 #define elf_backend_hash_symbol ppc_elf_hash_symbol
10162 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
10163 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
10164 #define elf_backend_fake_sections ppc_elf_fake_sections
10165 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
10166 #define elf_backend_modify_segment_map ppc_elf_modify_segment_map
10167 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
10168 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
10169 #define elf_backend_write_core_note ppc_elf_write_core_note
10170 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
10171 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
10172 #define elf_backend_final_write_processing ppc_elf_final_write_processing
10173 #define elf_backend_write_section ppc_elf_write_section
10174 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
10175 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
10176 #define elf_backend_action_discarded ppc_elf_action_discarded
10177 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
10178 #define elf_backend_lookup_section_flags_hook ppc_elf_lookup_section_flags
10179 #define elf_backend_section_processing ppc_elf_section_processing
10180
10181 #include "elf32-target.h"
10182
10183 /* FreeBSD Target */
10184
10185 #undef TARGET_LITTLE_SYM
10186 #undef TARGET_LITTLE_NAME
10187
10188 #undef TARGET_BIG_SYM
10189 #define TARGET_BIG_SYM bfd_elf32_powerpc_freebsd_vec
10190 #undef TARGET_BIG_NAME
10191 #define TARGET_BIG_NAME "elf32-powerpc-freebsd"
10192
10193 #undef ELF_OSABI
10194 #define ELF_OSABI ELFOSABI_FREEBSD
10195
10196 #undef elf32_bed
10197 #define elf32_bed elf32_powerpc_fbsd_bed
10198
10199 #include "elf32-target.h"
10200
10201 /* VxWorks Target */
10202
10203 #undef TARGET_LITTLE_SYM
10204 #undef TARGET_LITTLE_NAME
10205
10206 #undef TARGET_BIG_SYM
10207 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
10208 #undef TARGET_BIG_NAME
10209 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
10210
10211 #undef ELF_OSABI
10212
10213 /* VxWorks uses the elf default section flags for .plt. */
10214 static const struct bfd_elf_special_section *
10215 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
10216 {
10217 if (sec->name == NULL)
10218 return NULL;
10219
10220 if (strcmp (sec->name, ".plt") == 0)
10221 return _bfd_elf_get_sec_type_attr (abfd, sec);
10222
10223 return ppc_elf_get_sec_type_attr (abfd, sec);
10224 }
10225
10226 /* Like ppc_elf_link_hash_table_create, but overrides
10227 appropriately for VxWorks. */
10228 static struct bfd_link_hash_table *
10229 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
10230 {
10231 struct bfd_link_hash_table *ret;
10232
10233 ret = ppc_elf_link_hash_table_create (abfd);
10234 if (ret)
10235 {
10236 struct ppc_elf_link_hash_table *htab
10237 = (struct ppc_elf_link_hash_table *)ret;
10238 htab->is_vxworks = 1;
10239 htab->plt_type = PLT_VXWORKS;
10240 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
10241 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
10242 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
10243 }
10244 return ret;
10245 }
10246
10247 /* Tweak magic VxWorks symbols as they are loaded. */
10248 static bfd_boolean
10249 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
10250 struct bfd_link_info *info,
10251 Elf_Internal_Sym *sym,
10252 const char **namep ATTRIBUTE_UNUSED,
10253 flagword *flagsp ATTRIBUTE_UNUSED,
10254 asection **secp,
10255 bfd_vma *valp)
10256 {
10257 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
10258 valp))
10259 return FALSE;
10260
10261 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
10262 }
10263
10264 static void
10265 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
10266 {
10267 ppc_elf_final_write_processing(abfd, linker);
10268 elf_vxworks_final_write_processing(abfd, linker);
10269 }
10270
10271 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
10272 define it. */
10273 #undef elf_backend_want_plt_sym
10274 #define elf_backend_want_plt_sym 1
10275 #undef elf_backend_want_got_plt
10276 #define elf_backend_want_got_plt 1
10277 #undef elf_backend_got_symbol_offset
10278 #define elf_backend_got_symbol_offset 0
10279 #undef elf_backend_plt_not_loaded
10280 #define elf_backend_plt_not_loaded 0
10281 #undef elf_backend_plt_readonly
10282 #define elf_backend_plt_readonly 1
10283 #undef elf_backend_got_header_size
10284 #define elf_backend_got_header_size 12
10285
10286 #undef bfd_elf32_get_synthetic_symtab
10287
10288 #undef bfd_elf32_bfd_link_hash_table_create
10289 #define bfd_elf32_bfd_link_hash_table_create \
10290 ppc_elf_vxworks_link_hash_table_create
10291 #undef elf_backend_add_symbol_hook
10292 #define elf_backend_add_symbol_hook \
10293 ppc_elf_vxworks_add_symbol_hook
10294 #undef elf_backend_link_output_symbol_hook
10295 #define elf_backend_link_output_symbol_hook \
10296 elf_vxworks_link_output_symbol_hook
10297 #undef elf_backend_final_write_processing
10298 #define elf_backend_final_write_processing \
10299 ppc_elf_vxworks_final_write_processing
10300 #undef elf_backend_get_sec_type_attr
10301 #define elf_backend_get_sec_type_attr \
10302 ppc_elf_vxworks_get_sec_type_attr
10303 #undef elf_backend_emit_relocs
10304 #define elf_backend_emit_relocs \
10305 elf_vxworks_emit_relocs
10306
10307 #undef elf32_bed
10308 #define elf32_bed ppc_elf_vxworks_bed
10309 #undef elf_backend_post_process_headers
10310
10311 #include "elf32-target.h"
GDB Binutils - Deliverables
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