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[binutils.git] / bfd / coff-sh.c
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1 /* BFD back-end for Hitachi Super-H COFF binaries.
2 Copyright 1993, 94, 95, 96, 97, 98, 1999, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Support.
4 Written by Steve Chamberlain, <sac@cygnus.com>.
5 Relaxing code written by Ian Lance Taylor, <ian@cygnus.com>.
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 2 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 Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "libbfd.h"
26 #include "bfdlink.h"
27 #include "coff/sh.h"
28 #include "coff/internal.h"
29
30 #ifdef COFF_WITH_PE
31 #include "coff/pe.h"
32
33 #ifndef COFF_IMAGE_WITH_PE
34 static boolean sh_align_load_span
35 PARAMS ((bfd *, asection *, bfd_byte *,
36 boolean (*) (bfd *, asection *, PTR, bfd_byte *, bfd_vma),
37 PTR, bfd_vma **, bfd_vma *, bfd_vma, bfd_vma, boolean *));
38
39 #define _bfd_sh_align_load_span sh_align_load_span
40 #endif
41 #endif
42
43 #include "libcoff.h"
44
45 /* Internal functions. */
46 static bfd_reloc_status_type sh_reloc
47 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
48 static long get_symbol_value PARAMS ((asymbol *));
49 static boolean sh_relax_section
50 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
51 static boolean sh_relax_delete_bytes
52 PARAMS ((bfd *, asection *, bfd_vma, int));
53 #ifndef COFF_IMAGE_WITH_PE
54 static const struct sh_opcode *sh_insn_info PARAMS ((unsigned int));
55 #endif
56 static boolean sh_align_loads
57 PARAMS ((bfd *, asection *, struct internal_reloc *, bfd_byte *, boolean *));
58 static boolean sh_swap_insns
59 PARAMS ((bfd *, asection *, PTR, bfd_byte *, bfd_vma));
60 static boolean sh_relocate_section
61 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62 struct internal_reloc *, struct internal_syment *, asection **));
63 static bfd_byte *sh_coff_get_relocated_section_contents
64 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
65 bfd_byte *, boolean, asymbol **));
66
67 #ifdef COFF_WITH_PE
68 /* Can't build import tables with 2**4 alignment. */
69 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 2
70 #else
71 /* Default section alignment to 2**4. */
72 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 4
73 #endif
74
75 #ifdef COFF_IMAGE_WITH_PE
76 /* Align PE executables. */
77 #define COFF_PAGE_SIZE 0x1000
78 #endif
79
80 /* Generate long file names. */
81 #define COFF_LONG_FILENAMES
82
83 #ifdef COFF_WITH_PE
84 /* Return true if this relocation should
85 appear in the output .reloc section. */
86 static boolean in_reloc_p (abfd, howto)
87 bfd * abfd ATTRIBUTE_UNUSED;
88 reloc_howto_type * howto;
89 {
90 return ! howto->pc_relative && howto->type != R_SH_IMAGEBASE;
91 }
92 #endif
93
94 /* The supported relocations. There are a lot of relocations defined
95 in coff/internal.h which we do not expect to ever see. */
96 static reloc_howto_type sh_coff_howtos[] =
97 {
98 EMPTY_HOWTO (0),
99 EMPTY_HOWTO (1),
100 #ifdef COFF_WITH_PE
101 /* Windows CE */
102 HOWTO (R_SH_IMM32CE, /* type */
103 0, /* rightshift */
104 2, /* size (0 = byte, 1 = short, 2 = long) */
105 32, /* bitsize */
106 false, /* pc_relative */
107 0, /* bitpos */
108 complain_overflow_bitfield, /* complain_on_overflow */
109 sh_reloc, /* special_function */
110 "r_imm32ce", /* name */
111 true, /* partial_inplace */
112 0xffffffff, /* src_mask */
113 0xffffffff, /* dst_mask */
114 false), /* pcrel_offset */
115 #else
116 EMPTY_HOWTO (2),
117 #endif
118 EMPTY_HOWTO (3), /* R_SH_PCREL8 */
119 EMPTY_HOWTO (4), /* R_SH_PCREL16 */
120 EMPTY_HOWTO (5), /* R_SH_HIGH8 */
121 EMPTY_HOWTO (6), /* R_SH_IMM24 */
122 EMPTY_HOWTO (7), /* R_SH_LOW16 */
123 EMPTY_HOWTO (8),
124 EMPTY_HOWTO (9), /* R_SH_PCDISP8BY4 */
125
126 HOWTO (R_SH_PCDISP8BY2, /* type */
127 1, /* rightshift */
128 1, /* size (0 = byte, 1 = short, 2 = long) */
129 8, /* bitsize */
130 true, /* pc_relative */
131 0, /* bitpos */
132 complain_overflow_signed, /* complain_on_overflow */
133 sh_reloc, /* special_function */
134 "r_pcdisp8by2", /* name */
135 true, /* partial_inplace */
136 0xff, /* src_mask */
137 0xff, /* dst_mask */
138 true), /* pcrel_offset */
139
140 EMPTY_HOWTO (11), /* R_SH_PCDISP8 */
141
142 HOWTO (R_SH_PCDISP, /* type */
143 1, /* rightshift */
144 1, /* size (0 = byte, 1 = short, 2 = long) */
145 12, /* bitsize */
146 true, /* pc_relative */
147 0, /* bitpos */
148 complain_overflow_signed, /* complain_on_overflow */
149 sh_reloc, /* special_function */
150 "r_pcdisp12by2", /* name */
151 true, /* partial_inplace */
152 0xfff, /* src_mask */
153 0xfff, /* dst_mask */
154 true), /* pcrel_offset */
155
156 EMPTY_HOWTO (13),
157
158 HOWTO (R_SH_IMM32, /* type */
159 0, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 32, /* bitsize */
162 false, /* pc_relative */
163 0, /* bitpos */
164 complain_overflow_bitfield, /* complain_on_overflow */
165 sh_reloc, /* special_function */
166 "r_imm32", /* name */
167 true, /* partial_inplace */
168 0xffffffff, /* src_mask */
169 0xffffffff, /* dst_mask */
170 false), /* pcrel_offset */
171
172 EMPTY_HOWTO (15),
173 #ifdef COFF_WITH_PE
174 HOWTO (R_SH_IMAGEBASE, /* type */
175 0, /* rightshift */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
177 32, /* bitsize */
178 false, /* pc_relative */
179 0, /* bitpos */
180 complain_overflow_bitfield, /* complain_on_overflow */
181 sh_reloc, /* special_function */
182 "rva32", /* name */
183 true, /* partial_inplace */
184 0xffffffff, /* src_mask */
185 0xffffffff, /* dst_mask */
186 false), /* pcrel_offset */
187 #else
188 EMPTY_HOWTO (16), /* R_SH_IMM8 */
189 #endif
190 EMPTY_HOWTO (17), /* R_SH_IMM8BY2 */
191 EMPTY_HOWTO (18), /* R_SH_IMM8BY4 */
192 EMPTY_HOWTO (19), /* R_SH_IMM4 */
193 EMPTY_HOWTO (20), /* R_SH_IMM4BY2 */
194 EMPTY_HOWTO (21), /* R_SH_IMM4BY4 */
195
196 HOWTO (R_SH_PCRELIMM8BY2, /* type */
197 1, /* rightshift */
198 1, /* size (0 = byte, 1 = short, 2 = long) */
199 8, /* bitsize */
200 true, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_unsigned, /* complain_on_overflow */
203 sh_reloc, /* special_function */
204 "r_pcrelimm8by2", /* name */
205 true, /* partial_inplace */
206 0xff, /* src_mask */
207 0xff, /* dst_mask */
208 true), /* pcrel_offset */
209
210 HOWTO (R_SH_PCRELIMM8BY4, /* type */
211 2, /* rightshift */
212 1, /* size (0 = byte, 1 = short, 2 = long) */
213 8, /* bitsize */
214 true, /* pc_relative */
215 0, /* bitpos */
216 complain_overflow_unsigned, /* complain_on_overflow */
217 sh_reloc, /* special_function */
218 "r_pcrelimm8by4", /* name */
219 true, /* partial_inplace */
220 0xff, /* src_mask */
221 0xff, /* dst_mask */
222 true), /* pcrel_offset */
223
224 HOWTO (R_SH_IMM16, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 false, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_bitfield, /* complain_on_overflow */
231 sh_reloc, /* special_function */
232 "r_imm16", /* name */
233 true, /* partial_inplace */
234 0xffff, /* src_mask */
235 0xffff, /* dst_mask */
236 false), /* pcrel_offset */
237
238 HOWTO (R_SH_SWITCH16, /* type */
239 0, /* rightshift */
240 1, /* size (0 = byte, 1 = short, 2 = long) */
241 16, /* bitsize */
242 false, /* pc_relative */
243 0, /* bitpos */
244 complain_overflow_bitfield, /* complain_on_overflow */
245 sh_reloc, /* special_function */
246 "r_switch16", /* name */
247 true, /* partial_inplace */
248 0xffff, /* src_mask */
249 0xffff, /* dst_mask */
250 false), /* pcrel_offset */
251
252 HOWTO (R_SH_SWITCH32, /* type */
253 0, /* rightshift */
254 2, /* size (0 = byte, 1 = short, 2 = long) */
255 32, /* bitsize */
256 false, /* pc_relative */
257 0, /* bitpos */
258 complain_overflow_bitfield, /* complain_on_overflow */
259 sh_reloc, /* special_function */
260 "r_switch32", /* name */
261 true, /* partial_inplace */
262 0xffffffff, /* src_mask */
263 0xffffffff, /* dst_mask */
264 false), /* pcrel_offset */
265
266 HOWTO (R_SH_USES, /* type */
267 0, /* rightshift */
268 1, /* size (0 = byte, 1 = short, 2 = long) */
269 16, /* bitsize */
270 false, /* pc_relative */
271 0, /* bitpos */
272 complain_overflow_bitfield, /* complain_on_overflow */
273 sh_reloc, /* special_function */
274 "r_uses", /* name */
275 true, /* partial_inplace */
276 0xffff, /* src_mask */
277 0xffff, /* dst_mask */
278 false), /* pcrel_offset */
279
280 HOWTO (R_SH_COUNT, /* type */
281 0, /* rightshift */
282 2, /* size (0 = byte, 1 = short, 2 = long) */
283 32, /* bitsize */
284 false, /* pc_relative */
285 0, /* bitpos */
286 complain_overflow_bitfield, /* complain_on_overflow */
287 sh_reloc, /* special_function */
288 "r_count", /* name */
289 true, /* partial_inplace */
290 0xffffffff, /* src_mask */
291 0xffffffff, /* dst_mask */
292 false), /* pcrel_offset */
293
294 HOWTO (R_SH_ALIGN, /* type */
295 0, /* rightshift */
296 2, /* size (0 = byte, 1 = short, 2 = long) */
297 32, /* bitsize */
298 false, /* pc_relative */
299 0, /* bitpos */
300 complain_overflow_bitfield, /* complain_on_overflow */
301 sh_reloc, /* special_function */
302 "r_align", /* name */
303 true, /* partial_inplace */
304 0xffffffff, /* src_mask */
305 0xffffffff, /* dst_mask */
306 false), /* pcrel_offset */
307
308 HOWTO (R_SH_CODE, /* type */
309 0, /* rightshift */
310 2, /* size (0 = byte, 1 = short, 2 = long) */
311 32, /* bitsize */
312 false, /* pc_relative */
313 0, /* bitpos */
314 complain_overflow_bitfield, /* complain_on_overflow */
315 sh_reloc, /* special_function */
316 "r_code", /* name */
317 true, /* partial_inplace */
318 0xffffffff, /* src_mask */
319 0xffffffff, /* dst_mask */
320 false), /* pcrel_offset */
321
322 HOWTO (R_SH_DATA, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 32, /* bitsize */
326 false, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_bitfield, /* complain_on_overflow */
329 sh_reloc, /* special_function */
330 "r_data", /* name */
331 true, /* partial_inplace */
332 0xffffffff, /* src_mask */
333 0xffffffff, /* dst_mask */
334 false), /* pcrel_offset */
335
336 HOWTO (R_SH_LABEL, /* type */
337 0, /* rightshift */
338 2, /* size (0 = byte, 1 = short, 2 = long) */
339 32, /* bitsize */
340 false, /* pc_relative */
341 0, /* bitpos */
342 complain_overflow_bitfield, /* complain_on_overflow */
343 sh_reloc, /* special_function */
344 "r_label", /* name */
345 true, /* partial_inplace */
346 0xffffffff, /* src_mask */
347 0xffffffff, /* dst_mask */
348 false), /* pcrel_offset */
349
350 HOWTO (R_SH_SWITCH8, /* type */
351 0, /* rightshift */
352 0, /* size (0 = byte, 1 = short, 2 = long) */
353 8, /* bitsize */
354 false, /* pc_relative */
355 0, /* bitpos */
356 complain_overflow_bitfield, /* complain_on_overflow */
357 sh_reloc, /* special_function */
358 "r_switch8", /* name */
359 true, /* partial_inplace */
360 0xff, /* src_mask */
361 0xff, /* dst_mask */
362 false) /* pcrel_offset */
363 };
364
365 #define SH_COFF_HOWTO_COUNT (sizeof sh_coff_howtos / sizeof sh_coff_howtos[0])
366
367 /* Check for a bad magic number. */
368 #define BADMAG(x) SHBADMAG(x)
369
370 /* Customize coffcode.h (this is not currently used). */
371 #define SH 1
372
373 /* FIXME: This should not be set here. */
374 #define __A_MAGIC_SET__
375
376 #ifndef COFF_WITH_PE
377 /* Swap the r_offset field in and out. */
378 #define SWAP_IN_RELOC_OFFSET bfd_h_get_32
379 #define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
380
381 /* Swap out extra information in the reloc structure. */
382 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
383 do \
384 { \
385 dst->r_stuff[0] = 'S'; \
386 dst->r_stuff[1] = 'C'; \
387 } \
388 while (0)
389 #endif
390
391 /* Get the value of a symbol, when performing a relocation. */
392
393 static long
394 get_symbol_value (symbol)
395 asymbol *symbol;
396 {
397 bfd_vma relocation;
398
399 if (bfd_is_com_section (symbol->section))
400 relocation = 0;
401 else
402 relocation = (symbol->value +
403 symbol->section->output_section->vma +
404 symbol->section->output_offset);
405
406 return relocation;
407 }
408
409 #ifdef COFF_WITH_PE
410 /* Convert an rtype to howto for the COFF backend linker.
411 Copied from coff-i386. */
412 #define coff_rtype_to_howto coff_sh_rtype_to_howto
413
414 static reloc_howto_type *
415 coff_sh_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
416 bfd * abfd ATTRIBUTE_UNUSED;
417 asection * sec;
418 struct internal_reloc * rel;
419 struct coff_link_hash_entry * h;
420 struct internal_syment * sym;
421 bfd_vma * addendp;
422 {
423 reloc_howto_type * howto;
424
425 howto = sh_coff_howtos + rel->r_type;
426
427 *addendp = 0;
428
429 if (howto->pc_relative)
430 *addendp += sec->vma;
431
432 if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
433 {
434 /* This is a common symbol. The section contents include the
435 size (sym->n_value) as an addend. The relocate_section
436 function will be adding in the final value of the symbol. We
437 need to subtract out the current size in order to get the
438 correct result. */
439 BFD_ASSERT (h != NULL);
440 }
441
442 if (howto->pc_relative)
443 {
444 *addendp -= 4;
445
446 /* If the symbol is defined, then the generic code is going to
447 add back the symbol value in order to cancel out an
448 adjustment it made to the addend. However, we set the addend
449 to 0 at the start of this function. We need to adjust here,
450 to avoid the adjustment the generic code will make. FIXME:
451 This is getting a bit hackish. */
452 if (sym != NULL && sym->n_scnum != 0)
453 *addendp -= sym->n_value;
454 }
455
456 if (rel->r_type == R_SH_IMAGEBASE)
457 *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
458
459 return howto;
460 }
461
462 /* This structure is used to map BFD reloc codes to SH PE relocs. */
463 struct shcoff_reloc_map
464 {
465 unsigned char bfd_reloc_val;
466 unsigned char shcoff_reloc_val;
467 };
468
469 /* An array mapping BFD reloc codes to SH PE relocs. */
470 static const struct shcoff_reloc_map sh_reloc_map[] =
471 {
472 { BFD_RELOC_32, R_SH_IMM32CE },
473 { BFD_RELOC_RVA, R_SH_IMAGEBASE },
474 { BFD_RELOC_CTOR, R_SH_IMM32CE },
475 };
476
477 /* Given a BFD reloc code, return the howto structure for the
478 corresponding SH PE reloc. */
479 #define coff_bfd_reloc_type_lookup sh_coff_reloc_type_lookup
480
481 static reloc_howto_type *
482 sh_coff_reloc_type_lookup (abfd, code)
483 bfd * abfd ATTRIBUTE_UNUSED;
484 bfd_reloc_code_real_type code;
485 {
486 unsigned int i;
487
488 for (i = 0; i < sizeof (sh_reloc_map) / sizeof (struct shcoff_reloc_map); i++)
489 {
490 if (sh_reloc_map[i].bfd_reloc_val == code)
491 return &sh_coff_howtos[(int) sh_reloc_map[i].shcoff_reloc_val];
492 }
493
494 fprintf (stderr, "SH Error: unknown reloc type %d\n", code);
495 return NULL;
496 }
497 #endif /* COFF_WITH_PE */
498
499 /* This macro is used in coffcode.h to get the howto corresponding to
500 an internal reloc. */
501
502 #define RTYPE2HOWTO(relent, internal) \
503 ((relent)->howto = \
504 ((internal)->r_type < SH_COFF_HOWTO_COUNT \
505 ? &sh_coff_howtos[(internal)->r_type] \
506 : (reloc_howto_type *) NULL))
507
508 /* This is the same as the macro in coffcode.h, except that it copies
509 r_offset into reloc_entry->addend for some relocs. */
510 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
511 { \
512 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
513 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
514 coffsym = (obj_symbols (abfd) \
515 + (cache_ptr->sym_ptr_ptr - symbols)); \
516 else if (ptr) \
517 coffsym = coff_symbol_from (abfd, ptr); \
518 if (coffsym != (coff_symbol_type *) NULL \
519 && coffsym->native->u.syment.n_scnum == 0) \
520 cache_ptr->addend = 0; \
521 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
522 && ptr->section != (asection *) NULL) \
523 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
524 else \
525 cache_ptr->addend = 0; \
526 if ((reloc).r_type == R_SH_SWITCH8 \
527 || (reloc).r_type == R_SH_SWITCH16 \
528 || (reloc).r_type == R_SH_SWITCH32 \
529 || (reloc).r_type == R_SH_USES \
530 || (reloc).r_type == R_SH_COUNT \
531 || (reloc).r_type == R_SH_ALIGN) \
532 cache_ptr->addend = (reloc).r_offset; \
533 }
534
535 /* This is the howto function for the SH relocations. */
536
537 static bfd_reloc_status_type
538 sh_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
539 error_message)
540 bfd *abfd;
541 arelent *reloc_entry;
542 asymbol *symbol_in;
543 PTR data;
544 asection *input_section;
545 bfd *output_bfd;
546 char **error_message ATTRIBUTE_UNUSED;
547 {
548 unsigned long insn;
549 bfd_vma sym_value;
550 unsigned short r_type;
551 bfd_vma addr = reloc_entry->address;
552 bfd_byte *hit_data = addr + (bfd_byte *) data;
553
554 r_type = reloc_entry->howto->type;
555
556 if (output_bfd != NULL)
557 {
558 /* Partial linking--do nothing. */
559 reloc_entry->address += input_section->output_offset;
560 return bfd_reloc_ok;
561 }
562
563 /* Almost all relocs have to do with relaxing. If any work must be
564 done for them, it has been done in sh_relax_section. */
565 if (r_type != R_SH_IMM32
566 #ifdef COFF_WITH_PE
567 && r_type != R_SH_IMM32CE
568 && r_type != R_SH_IMAGEBASE
569 #endif
570 && (r_type != R_SH_PCDISP
571 || (symbol_in->flags & BSF_LOCAL) != 0))
572 return bfd_reloc_ok;
573
574 if (symbol_in != NULL
575 && bfd_is_und_section (symbol_in->section))
576 return bfd_reloc_undefined;
577
578 sym_value = get_symbol_value (symbol_in);
579
580 switch (r_type)
581 {
582 case R_SH_IMM32:
583 #ifdef COFF_WITH_PE
584 case R_SH_IMM32CE:
585 #endif
586 insn = bfd_get_32 (abfd, hit_data);
587 insn += sym_value + reloc_entry->addend;
588 bfd_put_32 (abfd, insn, hit_data);
589 break;
590 #ifdef COFF_WITH_PE
591 case R_SH_IMAGEBASE:
592 insn = bfd_get_32 (abfd, hit_data);
593 insn += (sym_value + reloc_entry->addend
594 - pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase);
595 bfd_put_32 (abfd, insn, hit_data);
596 break;
597 #endif
598 case R_SH_PCDISP:
599 insn = bfd_get_16 (abfd, hit_data);
600 sym_value += reloc_entry->addend;
601 sym_value -= (input_section->output_section->vma
602 + input_section->output_offset
603 + addr
604 + 4);
605 sym_value += (insn & 0xfff) << 1;
606 if (insn & 0x800)
607 sym_value -= 0x1000;
608 insn = (insn & 0xf000) | (sym_value & 0xfff);
609 bfd_put_16 (abfd, insn, hit_data);
610 if (sym_value < (bfd_vma) -0x1000 || sym_value >= 0x1000)
611 return bfd_reloc_overflow;
612 break;
613 default:
614 abort ();
615 break;
616 }
617
618 return bfd_reloc_ok;
619 }
620
621 #define coff_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match
622
623 /* We can do relaxing. */
624 #define coff_bfd_relax_section sh_relax_section
625
626 /* We use the special COFF backend linker. */
627 #define coff_relocate_section sh_relocate_section
628
629 /* When relaxing, we need to use special code to get the relocated
630 section contents. */
631 #define coff_bfd_get_relocated_section_contents \
632 sh_coff_get_relocated_section_contents
633
634 #include "coffcode.h"
635 \f
636 /* This function handles relaxing on the SH.
637
638 Function calls on the SH look like this:
639
640 movl L1,r0
641 ...
642 jsr @r0
643 ...
644 L1:
645 .long function
646
647 The compiler and assembler will cooperate to create R_SH_USES
648 relocs on the jsr instructions. The r_offset field of the
649 R_SH_USES reloc is the PC relative offset to the instruction which
650 loads the register (the r_offset field is computed as though it
651 were a jump instruction, so the offset value is actually from four
652 bytes past the instruction). The linker can use this reloc to
653 determine just which function is being called, and thus decide
654 whether it is possible to replace the jsr with a bsr.
655
656 If multiple function calls are all based on a single register load
657 (i.e., the same function is called multiple times), the compiler
658 guarantees that each function call will have an R_SH_USES reloc.
659 Therefore, if the linker is able to convert each R_SH_USES reloc
660 which refers to that address, it can safely eliminate the register
661 load.
662
663 When the assembler creates an R_SH_USES reloc, it examines it to
664 determine which address is being loaded (L1 in the above example).
665 It then counts the number of references to that address, and
666 creates an R_SH_COUNT reloc at that address. The r_offset field of
667 the R_SH_COUNT reloc will be the number of references. If the
668 linker is able to eliminate a register load, it can use the
669 R_SH_COUNT reloc to see whether it can also eliminate the function
670 address.
671
672 SH relaxing also handles another, unrelated, matter. On the SH, if
673 a load or store instruction is not aligned on a four byte boundary,
674 the memory cycle interferes with the 32 bit instruction fetch,
675 causing a one cycle bubble in the pipeline. Therefore, we try to
676 align load and store instructions on four byte boundaries if we
677 can, by swapping them with one of the adjacent instructions. */
678
679 static boolean
680 sh_relax_section (abfd, sec, link_info, again)
681 bfd *abfd;
682 asection *sec;
683 struct bfd_link_info *link_info;
684 boolean *again;
685 {
686 struct internal_reloc *internal_relocs;
687 struct internal_reloc *free_relocs = NULL;
688 boolean have_code;
689 struct internal_reloc *irel, *irelend;
690 bfd_byte *contents = NULL;
691 bfd_byte *free_contents = NULL;
692
693 *again = false;
694
695 if (link_info->relocateable
696 || (sec->flags & SEC_RELOC) == 0
697 || sec->reloc_count == 0)
698 return true;
699
700 /* If this is the first time we have been called for this section,
701 initialize the cooked size. */
702 if (sec->_cooked_size == 0)
703 sec->_cooked_size = sec->_raw_size;
704
705 internal_relocs = (_bfd_coff_read_internal_relocs
706 (abfd, sec, link_info->keep_memory,
707 (bfd_byte *) NULL, false,
708 (struct internal_reloc *) NULL));
709 if (internal_relocs == NULL)
710 goto error_return;
711 if (! link_info->keep_memory)
712 free_relocs = internal_relocs;
713
714 have_code = false;
715
716 irelend = internal_relocs + sec->reloc_count;
717 for (irel = internal_relocs; irel < irelend; irel++)
718 {
719 bfd_vma laddr, paddr, symval;
720 unsigned short insn;
721 struct internal_reloc *irelfn, *irelscan, *irelcount;
722 struct internal_syment sym;
723 bfd_signed_vma foff;
724
725 if (irel->r_type == R_SH_CODE)
726 have_code = true;
727
728 if (irel->r_type != R_SH_USES)
729 continue;
730
731 /* Get the section contents. */
732 if (contents == NULL)
733 {
734 if (coff_section_data (abfd, sec) != NULL
735 && coff_section_data (abfd, sec)->contents != NULL)
736 contents = coff_section_data (abfd, sec)->contents;
737 else
738 {
739 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
740 if (contents == NULL)
741 goto error_return;
742 free_contents = contents;
743
744 if (! bfd_get_section_contents (abfd, sec, contents,
745 (file_ptr) 0, sec->_raw_size))
746 goto error_return;
747 }
748 }
749
750 /* The r_offset field of the R_SH_USES reloc will point us to
751 the register load. The 4 is because the r_offset field is
752 computed as though it were a jump offset, which are based
753 from 4 bytes after the jump instruction. */
754 laddr = irel->r_vaddr - sec->vma + 4;
755 /* Careful to sign extend the 32-bit offset. */
756 laddr += ((irel->r_offset & 0xffffffff) ^ 0x80000000) - 0x80000000;
757 if (laddr >= sec->_raw_size)
758 {
759 (*_bfd_error_handler) ("%s: 0x%lx: warning: bad R_SH_USES offset",
760 bfd_get_filename (abfd),
761 (unsigned long) irel->r_vaddr);
762 continue;
763 }
764 insn = bfd_get_16 (abfd, contents + laddr);
765
766 /* If the instruction is not mov.l NN,rN, we don't know what to do. */
767 if ((insn & 0xf000) != 0xd000)
768 {
769 ((*_bfd_error_handler)
770 ("%s: 0x%lx: warning: R_SH_USES points to unrecognized insn 0x%x",
771 bfd_get_filename (abfd), (unsigned long) irel->r_vaddr, insn));
772 continue;
773 }
774
775 /* Get the address from which the register is being loaded. The
776 displacement in the mov.l instruction is quadrupled. It is a
777 displacement from four bytes after the movl instruction, but,
778 before adding in the PC address, two least significant bits
779 of the PC are cleared. We assume that the section is aligned
780 on a four byte boundary. */
781 paddr = insn & 0xff;
782 paddr *= 4;
783 paddr += (laddr + 4) &~ 3;
784 if (paddr >= sec->_raw_size)
785 {
786 ((*_bfd_error_handler)
787 ("%s: 0x%lx: warning: bad R_SH_USES load offset",
788 bfd_get_filename (abfd), (unsigned long) irel->r_vaddr));
789 continue;
790 }
791
792 /* Get the reloc for the address from which the register is
793 being loaded. This reloc will tell us which function is
794 actually being called. */
795 paddr += sec->vma;
796 for (irelfn = internal_relocs; irelfn < irelend; irelfn++)
797 if (irelfn->r_vaddr == paddr
798 #ifdef COFF_WITH_PE
799 && (irelfn->r_type == R_SH_IMM32
800 || irelfn->r_type == R_SH_IMM32CE
801 || irelfn->r_type == R_SH_IMAGEBASE))
802
803 #else
804 && irelfn->r_type == R_SH_IMM32)
805 #endif
806 break;
807 if (irelfn >= irelend)
808 {
809 ((*_bfd_error_handler)
810 ("%s: 0x%lx: warning: could not find expected reloc",
811 bfd_get_filename (abfd), (unsigned long) paddr));
812 continue;
813 }
814
815 /* Get the value of the symbol referred to by the reloc. */
816 if (! _bfd_coff_get_external_symbols (abfd))
817 goto error_return;
818 bfd_coff_swap_sym_in (abfd,
819 ((bfd_byte *) obj_coff_external_syms (abfd)
820 + (irelfn->r_symndx
821 * bfd_coff_symesz (abfd))),
822 &sym);
823 if (sym.n_scnum != 0 && sym.n_scnum != sec->target_index)
824 {
825 ((*_bfd_error_handler)
826 ("%s: 0x%lx: warning: symbol in unexpected section",
827 bfd_get_filename (abfd), (unsigned long) paddr));
828 continue;
829 }
830
831 if (sym.n_sclass != C_EXT)
832 {
833 symval = (sym.n_value
834 - sec->vma
835 + sec->output_section->vma
836 + sec->output_offset);
837 }
838 else
839 {
840 struct coff_link_hash_entry *h;
841
842 h = obj_coff_sym_hashes (abfd)[irelfn->r_symndx];
843 BFD_ASSERT (h != NULL);
844 if (h->root.type != bfd_link_hash_defined
845 && h->root.type != bfd_link_hash_defweak)
846 {
847 /* This appears to be a reference to an undefined
848 symbol. Just ignore it--it will be caught by the
849 regular reloc processing. */
850 continue;
851 }
852
853 symval = (h->root.u.def.value
854 + h->root.u.def.section->output_section->vma
855 + h->root.u.def.section->output_offset);
856 }
857
858 symval += bfd_get_32 (abfd, contents + paddr - sec->vma);
859
860 /* See if this function call can be shortened. */
861 foff = (symval
862 - (irel->r_vaddr
863 - sec->vma
864 + sec->output_section->vma
865 + sec->output_offset
866 + 4));
867 if (foff < -0x1000 || foff >= 0x1000)
868 {
869 /* After all that work, we can't shorten this function call. */
870 continue;
871 }
872
873 /* Shorten the function call. */
874
875 /* For simplicity of coding, we are going to modify the section
876 contents, the section relocs, and the BFD symbol table. We
877 must tell the rest of the code not to free up this
878 information. It would be possible to instead create a table
879 of changes which have to be made, as is done in coff-mips.c;
880 that would be more work, but would require less memory when
881 the linker is run. */
882
883 if (coff_section_data (abfd, sec) == NULL)
884 {
885 sec->used_by_bfd =
886 ((PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)));
887 if (sec->used_by_bfd == NULL)
888 goto error_return;
889 }
890
891 coff_section_data (abfd, sec)->relocs = internal_relocs;
892 coff_section_data (abfd, sec)->keep_relocs = true;
893 free_relocs = NULL;
894
895 coff_section_data (abfd, sec)->contents = contents;
896 coff_section_data (abfd, sec)->keep_contents = true;
897 free_contents = NULL;
898
899 obj_coff_keep_syms (abfd) = true;
900
901 /* Replace the jsr with a bsr. */
902
903 /* Change the R_SH_USES reloc into an R_SH_PCDISP reloc, and
904 replace the jsr with a bsr. */
905 irel->r_type = R_SH_PCDISP;
906 irel->r_symndx = irelfn->r_symndx;
907 if (sym.n_sclass != C_EXT)
908 {
909 /* If this needs to be changed because of future relaxing,
910 it will be handled here like other internal PCDISP
911 relocs. */
912 bfd_put_16 (abfd,
913 0xb000 | ((foff >> 1) & 0xfff),
914 contents + irel->r_vaddr - sec->vma);
915 }
916 else
917 {
918 /* We can't fully resolve this yet, because the external
919 symbol value may be changed by future relaxing. We let
920 the final link phase handle it. */
921 bfd_put_16 (abfd, 0xb000, contents + irel->r_vaddr - sec->vma);
922 }
923
924 /* See if there is another R_SH_USES reloc referring to the same
925 register load. */
926 for (irelscan = internal_relocs; irelscan < irelend; irelscan++)
927 if (irelscan->r_type == R_SH_USES
928 && laddr == irelscan->r_vaddr - sec->vma + 4 + irelscan->r_offset)
929 break;
930 if (irelscan < irelend)
931 {
932 /* Some other function call depends upon this register load,
933 and we have not yet converted that function call.
934 Indeed, we may never be able to convert it. There is
935 nothing else we can do at this point. */
936 continue;
937 }
938
939 /* Look for a R_SH_COUNT reloc on the location where the
940 function address is stored. Do this before deleting any
941 bytes, to avoid confusion about the address. */
942 for (irelcount = internal_relocs; irelcount < irelend; irelcount++)
943 if (irelcount->r_vaddr == paddr
944 && irelcount->r_type == R_SH_COUNT)
945 break;
946
947 /* Delete the register load. */
948 if (! sh_relax_delete_bytes (abfd, sec, laddr, 2))
949 goto error_return;
950
951 /* That will change things, so, just in case it permits some
952 other function call to come within range, we should relax
953 again. Note that this is not required, and it may be slow. */
954 *again = true;
955
956 /* Now check whether we got a COUNT reloc. */
957 if (irelcount >= irelend)
958 {
959 ((*_bfd_error_handler)
960 ("%s: 0x%lx: warning: could not find expected COUNT reloc",
961 bfd_get_filename (abfd), (unsigned long) paddr));
962 continue;
963 }
964
965 /* The number of uses is stored in the r_offset field. We've
966 just deleted one. */
967 if (irelcount->r_offset == 0)
968 {
969 ((*_bfd_error_handler) ("%s: 0x%lx: warning: bad count",
970 bfd_get_filename (abfd),
971 (unsigned long) paddr));
972 continue;
973 }
974
975 --irelcount->r_offset;
976
977 /* If there are no more uses, we can delete the address. Reload
978 the address from irelfn, in case it was changed by the
979 previous call to sh_relax_delete_bytes. */
980 if (irelcount->r_offset == 0)
981 {
982 if (! sh_relax_delete_bytes (abfd, sec,
983 irelfn->r_vaddr - sec->vma, 4))
984 goto error_return;
985 }
986
987 /* We've done all we can with that function call. */
988 }
989
990 /* Look for load and store instructions that we can align on four
991 byte boundaries. */
992 if (have_code)
993 {
994 boolean swapped;
995
996 /* Get the section contents. */
997 if (contents == NULL)
998 {
999 if (coff_section_data (abfd, sec) != NULL
1000 && coff_section_data (abfd, sec)->contents != NULL)
1001 contents = coff_section_data (abfd, sec)->contents;
1002 else
1003 {
1004 contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
1005 if (contents == NULL)
1006 goto error_return;
1007 free_contents = contents;
1008
1009 if (! bfd_get_section_contents (abfd, sec, contents,
1010 (file_ptr) 0, sec->_raw_size))
1011 goto error_return;
1012 }
1013 }
1014
1015 if (! sh_align_loads (abfd, sec, internal_relocs, contents, &swapped))
1016 goto error_return;
1017
1018 if (swapped)
1019 {
1020 if (coff_section_data (abfd, sec) == NULL)
1021 {
1022 sec->used_by_bfd =
1023 ((PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)));
1024 if (sec->used_by_bfd == NULL)
1025 goto error_return;
1026 }
1027
1028 coff_section_data (abfd, sec)->relocs = internal_relocs;
1029 coff_section_data (abfd, sec)->keep_relocs = true;
1030 free_relocs = NULL;
1031
1032 coff_section_data (abfd, sec)->contents = contents;
1033 coff_section_data (abfd, sec)->keep_contents = true;
1034 free_contents = NULL;
1035
1036 obj_coff_keep_syms (abfd) = true;
1037 }
1038 }
1039
1040 if (free_relocs != NULL)
1041 {
1042 free (free_relocs);
1043 free_relocs = NULL;
1044 }
1045
1046 if (free_contents != NULL)
1047 {
1048 if (! link_info->keep_memory)
1049 free (free_contents);
1050 else
1051 {
1052 /* Cache the section contents for coff_link_input_bfd. */
1053 if (coff_section_data (abfd, sec) == NULL)
1054 {
1055 sec->used_by_bfd =
1056 ((PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata)));
1057 if (sec->used_by_bfd == NULL)
1058 goto error_return;
1059 coff_section_data (abfd, sec)->relocs = NULL;
1060 }
1061 coff_section_data (abfd, sec)->contents = contents;
1062 }
1063 }
1064
1065 return true;
1066
1067 error_return:
1068 if (free_relocs != NULL)
1069 free (free_relocs);
1070 if (free_contents != NULL)
1071 free (free_contents);
1072 return false;
1073 }
1074
1075 /* Delete some bytes from a section while relaxing. */
1076
1077 static boolean
1078 sh_relax_delete_bytes (abfd, sec, addr, count)
1079 bfd *abfd;
1080 asection *sec;
1081 bfd_vma addr;
1082 int count;
1083 {
1084 bfd_byte *contents;
1085 struct internal_reloc *irel, *irelend;
1086 struct internal_reloc *irelalign;
1087 bfd_vma toaddr;
1088 bfd_byte *esym, *esymend;
1089 bfd_size_type symesz;
1090 struct coff_link_hash_entry **sym_hash;
1091 asection *o;
1092
1093 contents = coff_section_data (abfd, sec)->contents;
1094
1095 /* The deletion must stop at the next ALIGN reloc for an aligment
1096 power larger than the number of bytes we are deleting. */
1097
1098 irelalign = NULL;
1099 toaddr = sec->_cooked_size;
1100
1101 irel = coff_section_data (abfd, sec)->relocs;
1102 irelend = irel + sec->reloc_count;
1103 for (; irel < irelend; irel++)
1104 {
1105 if (irel->r_type == R_SH_ALIGN
1106 && irel->r_vaddr - sec->vma > addr
1107 && count < (1 << irel->r_offset))
1108 {
1109 irelalign = irel;
1110 toaddr = irel->r_vaddr - sec->vma;
1111 break;
1112 }
1113 }
1114
1115 /* Actually delete the bytes. */
1116 memmove (contents + addr, contents + addr + count, toaddr - addr - count);
1117 if (irelalign == NULL)
1118 sec->_cooked_size -= count;
1119 else
1120 {
1121 int i;
1122
1123 #define NOP_OPCODE (0x0009)
1124
1125 BFD_ASSERT ((count & 1) == 0);
1126 for (i = 0; i < count; i += 2)
1127 bfd_put_16 (abfd, NOP_OPCODE, contents + toaddr - count + i);
1128 }
1129
1130 /* Adjust all the relocs. */
1131 for (irel = coff_section_data (abfd, sec)->relocs; irel < irelend; irel++)
1132 {
1133 bfd_vma nraddr, stop;
1134 bfd_vma start = 0;
1135 int insn = 0;
1136 struct internal_syment sym;
1137 int off, adjust, oinsn;
1138 bfd_signed_vma voff = 0;
1139 boolean overflow;
1140
1141 /* Get the new reloc address. */
1142 nraddr = irel->r_vaddr - sec->vma;
1143 if ((irel->r_vaddr - sec->vma > addr
1144 && irel->r_vaddr - sec->vma < toaddr)
1145 || (irel->r_type == R_SH_ALIGN
1146 && irel->r_vaddr - sec->vma == toaddr))
1147 nraddr -= count;
1148
1149 /* See if this reloc was for the bytes we have deleted, in which
1150 case we no longer care about it. Don't delete relocs which
1151 represent addresses, though. */
1152 if (irel->r_vaddr - sec->vma >= addr
1153 && irel->r_vaddr - sec->vma < addr + count
1154 && irel->r_type != R_SH_ALIGN
1155 && irel->r_type != R_SH_CODE
1156 && irel->r_type != R_SH_DATA
1157 && irel->r_type != R_SH_LABEL)
1158 irel->r_type = R_SH_UNUSED;
1159
1160 /* If this is a PC relative reloc, see if the range it covers
1161 includes the bytes we have deleted. */
1162 switch (irel->r_type)
1163 {
1164 default:
1165 break;
1166
1167 case R_SH_PCDISP8BY2:
1168 case R_SH_PCDISP:
1169 case R_SH_PCRELIMM8BY2:
1170 case R_SH_PCRELIMM8BY4:
1171 start = irel->r_vaddr - sec->vma;
1172 insn = bfd_get_16 (abfd, contents + nraddr);
1173 break;
1174 }
1175
1176 switch (irel->r_type)
1177 {
1178 default:
1179 start = stop = addr;
1180 break;
1181
1182 case R_SH_IMM32:
1183 #ifdef COFF_WITH_PE
1184 case R_SH_IMM32CE:
1185 case R_SH_IMAGEBASE:
1186 #endif
1187 /* If this reloc is against a symbol defined in this
1188 section, and the symbol will not be adjusted below, we
1189 must check the addend to see it will put the value in
1190 range to be adjusted, and hence must be changed. */
1191 bfd_coff_swap_sym_in (abfd,
1192 ((bfd_byte *) obj_coff_external_syms (abfd)
1193 + (irel->r_symndx
1194 * bfd_coff_symesz (abfd))),
1195 &sym);
1196 if (sym.n_sclass != C_EXT
1197 && sym.n_scnum == sec->target_index
1198 && ((bfd_vma) sym.n_value <= addr
1199 || (bfd_vma) sym.n_value >= toaddr))
1200 {
1201 bfd_vma val;
1202
1203 val = bfd_get_32 (abfd, contents + nraddr);
1204 val += sym.n_value;
1205 if (val > addr && val < toaddr)
1206 bfd_put_32 (abfd, val - count, contents + nraddr);
1207 }
1208 start = stop = addr;
1209 break;
1210
1211 case R_SH_PCDISP8BY2:
1212 off = insn & 0xff;
1213 if (off & 0x80)
1214 off -= 0x100;
1215 stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2);
1216 break;
1217
1218 case R_SH_PCDISP:
1219 bfd_coff_swap_sym_in (abfd,
1220 ((bfd_byte *) obj_coff_external_syms (abfd)
1221 + (irel->r_symndx
1222 * bfd_coff_symesz (abfd))),
1223 &sym);
1224 if (sym.n_sclass == C_EXT)
1225 start = stop = addr;
1226 else
1227 {
1228 off = insn & 0xfff;
1229 if (off & 0x800)
1230 off -= 0x1000;
1231 stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2);
1232 }
1233 break;
1234
1235 case R_SH_PCRELIMM8BY2:
1236 off = insn & 0xff;
1237 stop = start + 4 + off * 2;
1238 break;
1239
1240 case R_SH_PCRELIMM8BY4:
1241 off = insn & 0xff;
1242 stop = (start &~ (bfd_vma) 3) + 4 + off * 4;
1243 break;
1244
1245 case R_SH_SWITCH8:
1246 case R_SH_SWITCH16:
1247 case R_SH_SWITCH32:
1248 /* These relocs types represent
1249 .word L2-L1
1250 The r_offset field holds the difference between the reloc
1251 address and L1. That is the start of the reloc, and
1252 adding in the contents gives us the top. We must adjust
1253 both the r_offset field and the section contents. */
1254
1255 start = irel->r_vaddr - sec->vma;
1256 stop = (bfd_vma) ((bfd_signed_vma) start - (long) irel->r_offset);
1257
1258 if (start > addr
1259 && start < toaddr
1260 && (stop <= addr || stop >= toaddr))
1261 irel->r_offset += count;
1262 else if (stop > addr
1263 && stop < toaddr
1264 && (start <= addr || start >= toaddr))
1265 irel->r_offset -= count;
1266
1267 start = stop;
1268
1269 if (irel->r_type == R_SH_SWITCH16)
1270 voff = bfd_get_signed_16 (abfd, contents + nraddr);
1271 else if (irel->r_type == R_SH_SWITCH8)
1272 voff = bfd_get_8 (abfd, contents + nraddr);
1273 else
1274 voff = bfd_get_signed_32 (abfd, contents + nraddr);
1275 stop = (bfd_vma) ((bfd_signed_vma) start + voff);
1276
1277 break;
1278
1279 case R_SH_USES:
1280 start = irel->r_vaddr - sec->vma;
1281 stop = (bfd_vma) ((bfd_signed_vma) start
1282 + (long) irel->r_offset
1283 + 4);
1284 break;
1285 }
1286
1287 if (start > addr
1288 && start < toaddr
1289 && (stop <= addr || stop >= toaddr))
1290 adjust = count;
1291 else if (stop > addr
1292 && stop < toaddr
1293 && (start <= addr || start >= toaddr))
1294 adjust = - count;
1295 else
1296 adjust = 0;
1297
1298 if (adjust != 0)
1299 {
1300 oinsn = insn;
1301 overflow = false;
1302 switch (irel->r_type)
1303 {
1304 default:
1305 abort ();
1306 break;
1307
1308 case R_SH_PCDISP8BY2:
1309 case R_SH_PCRELIMM8BY2:
1310 insn += adjust / 2;
1311 if ((oinsn & 0xff00) != (insn & 0xff00))
1312 overflow = true;
1313 bfd_put_16 (abfd, insn, contents + nraddr);
1314 break;
1315
1316 case R_SH_PCDISP:
1317 insn += adjust / 2;
1318 if ((oinsn & 0xf000) != (insn & 0xf000))
1319 overflow = true;
1320 bfd_put_16 (abfd, insn, contents + nraddr);
1321 break;
1322
1323 case R_SH_PCRELIMM8BY4:
1324 BFD_ASSERT (adjust == count || count >= 4);
1325 if (count >= 4)
1326 insn += adjust / 4;
1327 else
1328 {
1329 if ((irel->r_vaddr & 3) == 0)
1330 ++insn;
1331 }
1332 if ((oinsn & 0xff00) != (insn & 0xff00))
1333 overflow = true;
1334 bfd_put_16 (abfd, insn, contents + nraddr);
1335 break;
1336
1337 case R_SH_SWITCH8:
1338 voff += adjust;
1339 if (voff < 0 || voff >= 0xff)
1340 overflow = true;
1341 bfd_put_8 (abfd, voff, contents + nraddr);
1342 break;
1343
1344 case R_SH_SWITCH16:
1345 voff += adjust;
1346 if (voff < - 0x8000 || voff >= 0x8000)
1347 overflow = true;
1348 bfd_put_signed_16 (abfd, voff, contents + nraddr);
1349 break;
1350
1351 case R_SH_SWITCH32:
1352 voff += adjust;
1353 bfd_put_signed_32 (abfd, voff, contents + nraddr);
1354 break;
1355
1356 case R_SH_USES:
1357 irel->r_offset += adjust;
1358 break;
1359 }
1360
1361 if (overflow)
1362 {
1363 ((*_bfd_error_handler)
1364 ("%s: 0x%lx: fatal: reloc overflow while relaxing",
1365 bfd_get_filename (abfd), (unsigned long) irel->r_vaddr));
1366 bfd_set_error (bfd_error_bad_value);
1367 return false;
1368 }
1369 }
1370
1371 irel->r_vaddr = nraddr + sec->vma;
1372 }
1373
1374 /* Look through all the other sections. If there contain any IMM32
1375 relocs against internal symbols which we are not going to adjust
1376 below, we may need to adjust the addends. */
1377 for (o = abfd->sections; o != NULL; o = o->next)
1378 {
1379 struct internal_reloc *internal_relocs;
1380 struct internal_reloc *irelscan, *irelscanend;
1381 bfd_byte *ocontents;
1382
1383 if (o == sec
1384 || (o->flags & SEC_RELOC) == 0
1385 || o->reloc_count == 0)
1386 continue;
1387
1388 /* We always cache the relocs. Perhaps, if info->keep_memory is
1389 false, we should free them, if we are permitted to, when we
1390 leave sh_coff_relax_section. */
1391 internal_relocs = (_bfd_coff_read_internal_relocs
1392 (abfd, o, true, (bfd_byte *) NULL, false,
1393 (struct internal_reloc *) NULL));
1394 if (internal_relocs == NULL)
1395 return false;
1396
1397 ocontents = NULL;
1398 irelscanend = internal_relocs + o->reloc_count;
1399 for (irelscan = internal_relocs; irelscan < irelscanend; irelscan++)
1400 {
1401 struct internal_syment sym;
1402
1403 #ifdef COFF_WITH_PE
1404 if (irelscan->r_type != R_SH_IMM32
1405 && irelscan->r_type != R_SH_IMAGEBASE
1406 && irelscan->r_type != R_SH_IMM32CE)
1407 #else
1408 if (irelscan->r_type != R_SH_IMM32)
1409 #endif
1410 continue;
1411
1412 bfd_coff_swap_sym_in (abfd,
1413 ((bfd_byte *) obj_coff_external_syms (abfd)
1414 + (irelscan->r_symndx
1415 * bfd_coff_symesz (abfd))),
1416 &sym);
1417 if (sym.n_sclass != C_EXT
1418 && sym.n_scnum == sec->target_index
1419 && ((bfd_vma) sym.n_value <= addr
1420 || (bfd_vma) sym.n_value >= toaddr))
1421 {
1422 bfd_vma val;
1423
1424 if (ocontents == NULL)
1425 {
1426 if (coff_section_data (abfd, o)->contents != NULL)
1427 ocontents = coff_section_data (abfd, o)->contents;
1428 else
1429 {
1430 /* We always cache the section contents.
1431 Perhaps, if info->keep_memory is false, we
1432 should free them, if we are permitted to,
1433 when we leave sh_coff_relax_section. */
1434 ocontents = (bfd_byte *) bfd_malloc (o->_raw_size);
1435 if (ocontents == NULL)
1436 return false;
1437 if (! bfd_get_section_contents (abfd, o, ocontents,
1438 (file_ptr) 0,
1439 o->_raw_size))
1440 return false;
1441 coff_section_data (abfd, o)->contents = ocontents;
1442 }
1443 }
1444
1445 val = bfd_get_32 (abfd, ocontents + irelscan->r_vaddr - o->vma);
1446 val += sym.n_value;
1447 if (val > addr && val < toaddr)
1448 bfd_put_32 (abfd, val - count,
1449 ocontents + irelscan->r_vaddr - o->vma);
1450
1451 coff_section_data (abfd, o)->keep_contents = true;
1452 }
1453 }
1454 }
1455
1456 /* Adjusting the internal symbols will not work if something has
1457 already retrieved the generic symbols. It would be possible to
1458 make this work by adjusting the generic symbols at the same time.
1459 However, this case should not arise in normal usage. */
1460 if (obj_symbols (abfd) != NULL
1461 || obj_raw_syments (abfd) != NULL)
1462 {
1463 ((*_bfd_error_handler)
1464 ("%s: fatal: generic symbols retrieved before relaxing",
1465 bfd_get_filename (abfd)));
1466 bfd_set_error (bfd_error_invalid_operation);
1467 return false;
1468 }
1469
1470 /* Adjust all the symbols. */
1471 sym_hash = obj_coff_sym_hashes (abfd);
1472 symesz = bfd_coff_symesz (abfd);
1473 esym = (bfd_byte *) obj_coff_external_syms (abfd);
1474 esymend = esym + obj_raw_syment_count (abfd) * symesz;
1475 while (esym < esymend)
1476 {
1477 struct internal_syment isym;
1478
1479 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &isym);
1480
1481 if (isym.n_scnum == sec->target_index
1482 && (bfd_vma) isym.n_value > addr
1483 && (bfd_vma) isym.n_value < toaddr)
1484 {
1485 isym.n_value -= count;
1486
1487 bfd_coff_swap_sym_out (abfd, (PTR) &isym, (PTR) esym);
1488
1489 if (*sym_hash != NULL)
1490 {
1491 BFD_ASSERT ((*sym_hash)->root.type == bfd_link_hash_defined
1492 || (*sym_hash)->root.type == bfd_link_hash_defweak);
1493 BFD_ASSERT ((*sym_hash)->root.u.def.value >= addr
1494 && (*sym_hash)->root.u.def.value < toaddr);
1495 (*sym_hash)->root.u.def.value -= count;
1496 }
1497 }
1498
1499 esym += (isym.n_numaux + 1) * symesz;
1500 sym_hash += isym.n_numaux + 1;
1501 }
1502
1503 /* See if we can move the ALIGN reloc forward. We have adjusted
1504 r_vaddr for it already. */
1505 if (irelalign != NULL)
1506 {
1507 bfd_vma alignto, alignaddr;
1508
1509 alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_offset);
1510 alignaddr = BFD_ALIGN (irelalign->r_vaddr - sec->vma,
1511 1 << irelalign->r_offset);
1512 if (alignto != alignaddr)
1513 {
1514 /* Tail recursion. */
1515 return sh_relax_delete_bytes (abfd, sec, alignaddr,
1516 alignto - alignaddr);
1517 }
1518 }
1519
1520 return true;
1521 }
1522 \f
1523 /* This is yet another version of the SH opcode table, used to rapidly
1524 get information about a particular instruction. */
1525
1526 /* The opcode map is represented by an array of these structures. The
1527 array is indexed by the high order four bits in the instruction. */
1528
1529 struct sh_major_opcode
1530 {
1531 /* A pointer to the instruction list. This is an array which
1532 contains all the instructions with this major opcode. */
1533 const struct sh_minor_opcode *minor_opcodes;
1534 /* The number of elements in minor_opcodes. */
1535 unsigned short count;
1536 };
1537
1538 /* This structure holds information for a set of SH opcodes. The
1539 instruction code is anded with the mask value, and the resulting
1540 value is used to search the order opcode list. */
1541
1542 struct sh_minor_opcode
1543 {
1544 /* The sorted opcode list. */
1545 const struct sh_opcode *opcodes;
1546 /* The number of elements in opcodes. */
1547 unsigned short count;
1548 /* The mask value to use when searching the opcode list. */
1549 unsigned short mask;
1550 };
1551
1552 /* This structure holds information for an SH instruction. An array
1553 of these structures is sorted in order by opcode. */
1554
1555 struct sh_opcode
1556 {
1557 /* The code for this instruction, after it has been anded with the
1558 mask value in the sh_major_opcode structure. */
1559 unsigned short opcode;
1560 /* Flags for this instruction. */
1561 unsigned long flags;
1562 };
1563
1564 /* Flag which appear in the sh_opcode structure. */
1565
1566 /* This instruction loads a value from memory. */
1567 #define LOAD (0x1)
1568
1569 /* This instruction stores a value to memory. */
1570 #define STORE (0x2)
1571
1572 /* This instruction is a branch. */
1573 #define BRANCH (0x4)
1574
1575 /* This instruction has a delay slot. */
1576 #define DELAY (0x8)
1577
1578 /* This instruction uses the value in the register in the field at
1579 mask 0x0f00 of the instruction. */
1580 #define USES1 (0x10)
1581 #define USES1_REG(x) ((x & 0x0f00) >> 8)
1582
1583 /* This instruction uses the value in the register in the field at
1584 mask 0x00f0 of the instruction. */
1585 #define USES2 (0x20)
1586 #define USES2_REG(x) ((x & 0x00f0) >> 4)
1587
1588 /* This instruction uses the value in register 0. */
1589 #define USESR0 (0x40)
1590
1591 /* This instruction sets the value in the register in the field at
1592 mask 0x0f00 of the instruction. */
1593 #define SETS1 (0x80)
1594 #define SETS1_REG(x) ((x & 0x0f00) >> 8)
1595
1596 /* This instruction sets the value in the register in the field at
1597 mask 0x00f0 of the instruction. */
1598 #define SETS2 (0x100)
1599 #define SETS2_REG(x) ((x & 0x00f0) >> 4)
1600
1601 /* This instruction sets register 0. */
1602 #define SETSR0 (0x200)
1603
1604 /* This instruction sets a special register. */
1605 #define SETSSP (0x400)
1606
1607 /* This instruction uses a special register. */
1608 #define USESSP (0x800)
1609
1610 /* This instruction uses the floating point register in the field at
1611 mask 0x0f00 of the instruction. */
1612 #define USESF1 (0x1000)
1613 #define USESF1_REG(x) ((x & 0x0f00) >> 8)
1614
1615 /* This instruction uses the floating point register in the field at
1616 mask 0x00f0 of the instruction. */
1617 #define USESF2 (0x2000)
1618 #define USESF2_REG(x) ((x & 0x00f0) >> 4)
1619
1620 /* This instruction uses floating point register 0. */
1621 #define USESF0 (0x4000)
1622
1623 /* This instruction sets the floating point register in the field at
1624 mask 0x0f00 of the instruction. */
1625 #define SETSF1 (0x8000)
1626 #define SETSF1_REG(x) ((x & 0x0f00) >> 8)
1627
1628 #define USESAS (0x10000)
1629 #define USESAS_REG(x) (((((x) >> 8) - 2) & 3) + 2)
1630 #define USESR8 (0x20000)
1631 #define SETSAS (0x40000)
1632 #define SETSAS_REG(x) USESAS_REG (x)
1633
1634 #ifndef COFF_IMAGE_WITH_PE
1635 static boolean sh_insn_uses_reg
1636 PARAMS ((unsigned int, const struct sh_opcode *, unsigned int));
1637 static boolean sh_insn_sets_reg
1638 PARAMS ((unsigned int, const struct sh_opcode *, unsigned int));
1639 static boolean sh_insn_uses_or_sets_reg
1640 PARAMS ((unsigned int, const struct sh_opcode *, unsigned int));
1641 static boolean sh_insn_uses_freg
1642 PARAMS ((unsigned int, const struct sh_opcode *, unsigned int));
1643 static boolean sh_insn_sets_freg
1644 PARAMS ((unsigned int, const struct sh_opcode *, unsigned int));
1645 static boolean sh_insn_uses_or_sets_freg
1646 PARAMS ((unsigned int, const struct sh_opcode *, unsigned int));
1647 static boolean sh_insns_conflict
1648 PARAMS ((unsigned int, const struct sh_opcode *, unsigned int,
1649 const struct sh_opcode *));
1650 static boolean sh_load_use
1651 PARAMS ((unsigned int, const struct sh_opcode *, unsigned int,
1652 const struct sh_opcode *));
1653 #endif
1654 /* The opcode maps. */
1655
1656 #define MAP(a) a, sizeof a / sizeof a[0]
1657
1658 static const struct sh_opcode sh_opcode00[] =
1659 {
1660 { 0x0008, SETSSP }, /* clrt */
1661 { 0x0009, 0 }, /* nop */
1662 { 0x000b, BRANCH | DELAY | USESSP }, /* rts */
1663 { 0x0018, SETSSP }, /* sett */
1664 { 0x0019, SETSSP }, /* div0u */
1665 { 0x001b, 0 }, /* sleep */
1666 { 0x0028, SETSSP }, /* clrmac */
1667 { 0x002b, BRANCH | DELAY | SETSSP }, /* rte */
1668 { 0x0038, USESSP | SETSSP }, /* ldtlb */
1669 { 0x0048, SETSSP }, /* clrs */
1670 { 0x0058, SETSSP } /* sets */
1671 };
1672
1673 static const struct sh_opcode sh_opcode01[] =
1674 {
1675 { 0x0003, BRANCH | DELAY | USES1 | SETSSP }, /* bsrf rn */
1676 { 0x000a, SETS1 | USESSP }, /* sts mach,rn */
1677 { 0x001a, SETS1 | USESSP }, /* sts macl,rn */
1678 { 0x0023, BRANCH | DELAY | USES1 }, /* braf rn */
1679 { 0x0029, SETS1 | USESSP }, /* movt rn */
1680 { 0x002a, SETS1 | USESSP }, /* sts pr,rn */
1681 { 0x005a, SETS1 | USESSP }, /* sts fpul,rn */
1682 { 0x006a, SETS1 | USESSP }, /* sts fpscr,rn / sts dsr,rn */
1683 { 0x0083, LOAD | USES1 }, /* pref @rn */
1684 { 0x007a, SETS1 | USESSP }, /* sts a0,rn */
1685 { 0x008a, SETS1 | USESSP }, /* sts x0,rn */
1686 { 0x009a, SETS1 | USESSP }, /* sts x1,rn */
1687 { 0x00aa, SETS1 | USESSP }, /* sts y0,rn */
1688 { 0x00ba, SETS1 | USESSP } /* sts y1,rn */
1689 };
1690
1691 /* These sixteen instructions can be handled with one table entry below. */
1692 #if 0
1693 { 0x0002, SETS1 | USESSP }, /* stc sr,rn */
1694 { 0x0012, SETS1 | USESSP }, /* stc gbr,rn */
1695 { 0x0022, SETS1 | USESSP }, /* stc vbr,rn */
1696 { 0x0032, SETS1 | USESSP }, /* stc ssr,rn */
1697 { 0x0042, SETS1 | USESSP }, /* stc spc,rn */
1698 { 0x0052, SETS1 | USESSP }, /* stc mod,rn */
1699 { 0x0062, SETS1 | USESSP }, /* stc rs,rn */
1700 { 0x0072, SETS1 | USESSP }, /* stc re,rn */
1701 { 0x0082, SETS1 | USESSP }, /* stc r0_bank,rn */
1702 { 0x0092, SETS1 | USESSP }, /* stc r1_bank,rn */
1703 { 0x00a2, SETS1 | USESSP }, /* stc r2_bank,rn */
1704 { 0x00b2, SETS1 | USESSP }, /* stc r3_bank,rn */
1705 { 0x00c2, SETS1 | USESSP }, /* stc r4_bank,rn */
1706 { 0x00d2, SETS1 | USESSP }, /* stc r5_bank,rn */
1707 { 0x00e2, SETS1 | USESSP }, /* stc r6_bank,rn */
1708 { 0x00f2, SETS1 | USESSP } /* stc r7_bank,rn */
1709 #endif
1710
1711 static const struct sh_opcode sh_opcode02[] =
1712 {
1713 { 0x0002, SETS1 | USESSP }, /* stc <special_reg>,rn */
1714 { 0x0004, STORE | USES1 | USES2 | USESR0 }, /* mov.b rm,@(r0,rn) */
1715 { 0x0005, STORE | USES1 | USES2 | USESR0 }, /* mov.w rm,@(r0,rn) */
1716 { 0x0006, STORE | USES1 | USES2 | USESR0 }, /* mov.l rm,@(r0,rn) */
1717 { 0x0007, SETSSP | USES1 | USES2 }, /* mul.l rm,rn */
1718 { 0x000c, LOAD | SETS1 | USES2 | USESR0 }, /* mov.b @(r0,rm),rn */
1719 { 0x000d, LOAD | SETS1 | USES2 | USESR0 }, /* mov.w @(r0,rm),rn */
1720 { 0x000e, LOAD | SETS1 | USES2 | USESR0 }, /* mov.l @(r0,rm),rn */
1721 { 0x000f, LOAD|SETS1|SETS2|SETSSP|USES1|USES2|USESSP }, /* mac.l @rm+,@rn+ */
1722 };
1723
1724 static const struct sh_minor_opcode sh_opcode0[] =
1725 {
1726 { MAP (sh_opcode00), 0xffff },
1727 { MAP (sh_opcode01), 0xf0ff },
1728 { MAP (sh_opcode02), 0xf00f }
1729 };
1730
1731 static const struct sh_opcode sh_opcode10[] =
1732 {
1733 { 0x1000, STORE | USES1 | USES2 } /* mov.l rm,@(disp,rn) */
1734 };
1735
1736 static const struct sh_minor_opcode sh_opcode1[] =
1737 {
1738 { MAP (sh_opcode10), 0xf000 }
1739 };
1740
1741 static const struct sh_opcode sh_opcode20[] =
1742 {
1743 { 0x2000, STORE | USES1 | USES2 }, /* mov.b rm,@rn */
1744 { 0x2001, STORE | USES1 | USES2 }, /* mov.w rm,@rn */
1745 { 0x2002, STORE | USES1 | USES2 }, /* mov.l rm,@rn */
1746 { 0x2004, STORE | SETS1 | USES1 | USES2 }, /* mov.b rm,@-rn */
1747 { 0x2005, STORE | SETS1 | USES1 | USES2 }, /* mov.w rm,@-rn */
1748 { 0x2006, STORE | SETS1 | USES1 | USES2 }, /* mov.l rm,@-rn */
1749 { 0x2007, SETSSP | USES1 | USES2 | USESSP }, /* div0s */
1750 { 0x2008, SETSSP | USES1 | USES2 }, /* tst rm,rn */
1751 { 0x2009, SETS1 | USES1 | USES2 }, /* and rm,rn */
1752 { 0x200a, SETS1 | USES1 | USES2 }, /* xor rm,rn */
1753 { 0x200b, SETS1 | USES1 | USES2 }, /* or rm,rn */
1754 { 0x200c, SETSSP | USES1 | USES2 }, /* cmp/str rm,rn */
1755 { 0x200d, SETS1 | USES1 | USES2 }, /* xtrct rm,rn */
1756 { 0x200e, SETSSP | USES1 | USES2 }, /* mulu.w rm,rn */
1757 { 0x200f, SETSSP | USES1 | USES2 } /* muls.w rm,rn */
1758 };
1759
1760 static const struct sh_minor_opcode sh_opcode2[] =
1761 {
1762 { MAP (sh_opcode20), 0xf00f }
1763 };
1764
1765 static const struct sh_opcode sh_opcode30[] =
1766 {
1767 { 0x3000, SETSSP | USES1 | USES2 }, /* cmp/eq rm,rn */
1768 { 0x3002, SETSSP | USES1 | USES2 }, /* cmp/hs rm,rn */
1769 { 0x3003, SETSSP | USES1 | USES2 }, /* cmp/ge rm,rn */
1770 { 0x3004, SETSSP | USESSP | USES1 | USES2 }, /* div1 rm,rn */
1771 { 0x3005, SETSSP | USES1 | USES2 }, /* dmulu.l rm,rn */
1772 { 0x3006, SETSSP | USES1 | USES2 }, /* cmp/hi rm,rn */
1773 { 0x3007, SETSSP | USES1 | USES2 }, /* cmp/gt rm,rn */
1774 { 0x3008, SETS1 | USES1 | USES2 }, /* sub rm,rn */
1775 { 0x300a, SETS1 | SETSSP | USES1 | USES2 | USESSP }, /* subc rm,rn */
1776 { 0x300b, SETS1 | SETSSP | USES1 | USES2 }, /* subv rm,rn */
1777 { 0x300c, SETS1 | USES1 | USES2 }, /* add rm,rn */
1778 { 0x300d, SETSSP | USES1 | USES2 }, /* dmuls.l rm,rn */
1779 { 0x300e, SETS1 | SETSSP | USES1 | USES2 | USESSP }, /* addc rm,rn */
1780 { 0x300f, SETS1 | SETSSP | USES1 | USES2 } /* addv rm,rn */
1781 };
1782
1783 static const struct sh_minor_opcode sh_opcode3[] =
1784 {
1785 { MAP (sh_opcode30), 0xf00f }
1786 };
1787
1788 static const struct sh_opcode sh_opcode40[] =
1789 {
1790 { 0x4000, SETS1 | SETSSP | USES1 }, /* shll rn */
1791 { 0x4001, SETS1 | SETSSP | USES1 }, /* shlr rn */
1792 { 0x4002, STORE | SETS1 | USES1 | USESSP }, /* sts.l mach,@-rn */
1793 { 0x4004, SETS1 | SETSSP | USES1 }, /* rotl rn */
1794 { 0x4005, SETS1 | SETSSP | USES1 }, /* rotr rn */
1795 { 0x4006, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,mach */
1796 { 0x4008, SETS1 | USES1 }, /* shll2 rn */
1797 { 0x4009, SETS1 | USES1 }, /* shlr2 rn */
1798 { 0x400a, SETSSP | USES1 }, /* lds rm,mach */
1799 { 0x400b, BRANCH | DELAY | USES1 }, /* jsr @rn */
1800 { 0x4010, SETS1 | SETSSP | USES1 }, /* dt rn */
1801 { 0x4011, SETSSP | USES1 }, /* cmp/pz rn */
1802 { 0x4012, STORE | SETS1 | USES1 | USESSP }, /* sts.l macl,@-rn */
1803 { 0x4014, SETSSP | USES1 }, /* setrc rm */
1804 { 0x4015, SETSSP | USES1 }, /* cmp/pl rn */
1805 { 0x4016, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,macl */
1806 { 0x4018, SETS1 | USES1 }, /* shll8 rn */
1807 { 0x4019, SETS1 | USES1 }, /* shlr8 rn */
1808 { 0x401a, SETSSP | USES1 }, /* lds rm,macl */
1809 { 0x401b, LOAD | SETSSP | USES1 }, /* tas.b @rn */
1810 { 0x4020, SETS1 | SETSSP | USES1 }, /* shal rn */
1811 { 0x4021, SETS1 | SETSSP | USES1 }, /* shar rn */
1812 { 0x4022, STORE | SETS1 | USES1 | USESSP }, /* sts.l pr,@-rn */
1813 { 0x4024, SETS1 | SETSSP | USES1 | USESSP }, /* rotcl rn */
1814 { 0x4025, SETS1 | SETSSP | USES1 | USESSP }, /* rotcr rn */
1815 { 0x4026, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,pr */
1816 { 0x4028, SETS1 | USES1 }, /* shll16 rn */
1817 { 0x4029, SETS1 | USES1 }, /* shlr16 rn */
1818 { 0x402a, SETSSP | USES1 }, /* lds rm,pr */
1819 { 0x402b, BRANCH | DELAY | USES1 }, /* jmp @rn */
1820 { 0x4052, STORE | SETS1 | USES1 | USESSP }, /* sts.l fpul,@-rn */
1821 { 0x4056, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,fpul */
1822 { 0x405a, SETSSP | USES1 }, /* lds.l rm,fpul */
1823 { 0x4062, STORE | SETS1 | USES1 | USESSP }, /* sts.l fpscr / dsr,@-rn */
1824 { 0x4066, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,fpscr / dsr */
1825 { 0x406a, SETSSP | USES1 }, /* lds rm,fpscr / lds rm,dsr */
1826 { 0x4072, STORE | SETS1 | USES1 | USESSP }, /* sts.l a0,@-rn */
1827 { 0x4076, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,a0 */
1828 { 0x407a, SETSSP | USES1 }, /* lds.l rm,a0 */
1829 { 0x4082, STORE | SETS1 | USES1 | USESSP }, /* sts.l x0,@-rn */
1830 { 0x4086, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,x0 */
1831 { 0x408a, SETSSP | USES1 }, /* lds.l rm,x0 */
1832 { 0x4092, STORE | SETS1 | USES1 | USESSP }, /* sts.l x1,@-rn */
1833 { 0x4096, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,x1 */
1834 { 0x409a, SETSSP | USES1 }, /* lds.l rm,x1 */
1835 { 0x40a2, STORE | SETS1 | USES1 | USESSP }, /* sts.l y0,@-rn */
1836 { 0x40a6, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,y0 */
1837 { 0x40aa, SETSSP | USES1 }, /* lds.l rm,y0 */
1838 { 0x40b2, STORE | SETS1 | USES1 | USESSP }, /* sts.l y1,@-rn */
1839 { 0x40b6, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,y1 */
1840 { 0x40ba, SETSSP | USES1 } /* lds.l rm,y1 */
1841 #if 0 /* These groups sixteen insns can be
1842 handled with one table entry each below. */
1843 { 0x4003, STORE | SETS1 | USES1 | USESSP }, /* stc.l sr,@-rn */
1844 { 0x4013, STORE | SETS1 | USES1 | USESSP }, /* stc.l gbr,@-rn */
1845 { 0x4023, STORE | SETS1 | USES1 | USESSP }, /* stc.l vbr,@-rn */
1846 { 0x4033, STORE | SETS1 | USES1 | USESSP }, /* stc.l ssr,@-rn */
1847 { 0x4043, STORE | SETS1 | USES1 | USESSP }, /* stc.l spc,@-rn */
1848 { 0x4053, STORE | SETS1 | USES1 | USESSP }, /* stc.l mod,@-rn */
1849 { 0x4063, STORE | SETS1 | USES1 | USESSP }, /* stc.l rs,@-rn */
1850 { 0x4073, STORE | SETS1 | USES1 | USESSP }, /* stc.l re,@-rn */
1851 { 0x4083, STORE | SETS1 | USES1 | USESSP }, /* stc.l r0_bank,@-rn */
1852 ..
1853 { 0x40f3, STORE | SETS1 | USES1 | USESSP }, /* stc.l r7_bank,@-rn */
1854
1855 { 0x4007, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,sr */
1856 { 0x4017, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,gbr */
1857 { 0x4027, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,vbr */
1858 { 0x4037, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,ssr */
1859 { 0x4047, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,spc */
1860 { 0x4057, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,mod */
1861 { 0x4067, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,rs */
1862 { 0x4077, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,re */
1863 { 0x4087, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,r0_bank */
1864 ..
1865 { 0x40f7, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,r7_bank */
1866
1867 { 0x400e, SETSSP | USES1 }, /* ldc rm,sr */
1868 { 0x401e, SETSSP | USES1 }, /* ldc rm,gbr */
1869 { 0x402e, SETSSP | USES1 }, /* ldc rm,vbr */
1870 { 0x403e, SETSSP | USES1 }, /* ldc rm,ssr */
1871 { 0x404e, SETSSP | USES1 }, /* ldc rm,spc */
1872 { 0x405e, SETSSP | USES1 }, /* ldc rm,mod */
1873 { 0x406e, SETSSP | USES1 }, /* ldc rm,rs */
1874 { 0x407e, SETSSP | USES1 } /* ldc rm,re */
1875 { 0x408e, SETSSP | USES1 } /* ldc rm,r0_bank */
1876 ..
1877 { 0x40fe, SETSSP | USES1 } /* ldc rm,r7_bank */
1878 #endif
1879 };
1880
1881 static const struct sh_opcode sh_opcode41[] =
1882 {
1883 { 0x4003, STORE | SETS1 | USES1 | USESSP }, /* stc.l <special_reg>,@-rn */
1884 { 0x4007, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,<special_reg> */
1885 { 0x400c, SETS1 | USES1 | USES2 }, /* shad rm,rn */
1886 { 0x400d, SETS1 | USES1 | USES2 }, /* shld rm,rn */
1887 { 0x400e, SETSSP | USES1 }, /* ldc rm,<special_reg> */
1888 { 0x400f, LOAD|SETS1|SETS2|SETSSP|USES1|USES2|USESSP }, /* mac.w @rm+,@rn+ */
1889 };
1890
1891 static const struct sh_minor_opcode sh_opcode4[] =
1892 {
1893 { MAP (sh_opcode40), 0xf0ff },
1894 { MAP (sh_opcode41), 0xf00f }
1895 };
1896
1897 static const struct sh_opcode sh_opcode50[] =
1898 {
1899 { 0x5000, LOAD | SETS1 | USES2 } /* mov.l @(disp,rm),rn */
1900 };
1901
1902 static const struct sh_minor_opcode sh_opcode5[] =
1903 {
1904 { MAP (sh_opcode50), 0xf000 }
1905 };
1906
1907 static const struct sh_opcode sh_opcode60[] =
1908 {
1909 { 0x6000, LOAD | SETS1 | USES2 }, /* mov.b @rm,rn */
1910 { 0x6001, LOAD | SETS1 | USES2 }, /* mov.w @rm,rn */
1911 { 0x6002, LOAD | SETS1 | USES2 }, /* mov.l @rm,rn */
1912 { 0x6003, SETS1 | USES2 }, /* mov rm,rn */
1913 { 0x6004, LOAD | SETS1 | SETS2 | USES2 }, /* mov.b @rm+,rn */
1914 { 0x6005, LOAD | SETS1 | SETS2 | USES2 }, /* mov.w @rm+,rn */
1915 { 0x6006, LOAD | SETS1 | SETS2 | USES2 }, /* mov.l @rm+,rn */
1916 { 0x6007, SETS1 | USES2 }, /* not rm,rn */
1917 { 0x6008, SETS1 | USES2 }, /* swap.b rm,rn */
1918 { 0x6009, SETS1 | USES2 }, /* swap.w rm,rn */
1919 { 0x600a, SETS1 | SETSSP | USES2 | USESSP }, /* negc rm,rn */
1920 { 0x600b, SETS1 | USES2 }, /* neg rm,rn */
1921 { 0x600c, SETS1 | USES2 }, /* extu.b rm,rn */
1922 { 0x600d, SETS1 | USES2 }, /* extu.w rm,rn */
1923 { 0x600e, SETS1 | USES2 }, /* exts.b rm,rn */
1924 { 0x600f, SETS1 | USES2 } /* exts.w rm,rn */
1925 };
1926
1927 static const struct sh_minor_opcode sh_opcode6[] =
1928 {
1929 { MAP (sh_opcode60), 0xf00f }
1930 };
1931
1932 static const struct sh_opcode sh_opcode70[] =
1933 {
1934 { 0x7000, SETS1 | USES1 } /* add #imm,rn */
1935 };
1936
1937 static const struct sh_minor_opcode sh_opcode7[] =
1938 {
1939 { MAP (sh_opcode70), 0xf000 }
1940 };
1941
1942 static const struct sh_opcode sh_opcode80[] =
1943 {
1944 { 0x8000, STORE | USES2 | USESR0 }, /* mov.b r0,@(disp,rn) */
1945 { 0x8100, STORE | USES2 | USESR0 }, /* mov.w r0,@(disp,rn) */
1946 { 0x8200, SETSSP }, /* setrc #imm */
1947 { 0x8400, LOAD | SETSR0 | USES2 }, /* mov.b @(disp,rm),r0 */
1948 { 0x8500, LOAD | SETSR0 | USES2 }, /* mov.w @(disp,rn),r0 */
1949 { 0x8800, SETSSP | USESR0 }, /* cmp/eq #imm,r0 */
1950 { 0x8900, BRANCH | USESSP }, /* bt label */
1951 { 0x8b00, BRANCH | USESSP }, /* bf label */
1952 { 0x8c00, SETSSP }, /* ldrs @(disp,pc) */
1953 { 0x8d00, BRANCH | DELAY | USESSP }, /* bt/s label */
1954 { 0x8e00, SETSSP }, /* ldre @(disp,pc) */
1955 { 0x8f00, BRANCH | DELAY | USESSP } /* bf/s label */
1956 };
1957
1958 static const struct sh_minor_opcode sh_opcode8[] =
1959 {
1960 { MAP (sh_opcode80), 0xff00 }
1961 };
1962
1963 static const struct sh_opcode sh_opcode90[] =
1964 {
1965 { 0x9000, LOAD | SETS1 } /* mov.w @(disp,pc),rn */
1966 };
1967
1968 static const struct sh_minor_opcode sh_opcode9[] =
1969 {
1970 { MAP (sh_opcode90), 0xf000 }
1971 };
1972
1973 static const struct sh_opcode sh_opcodea0[] =
1974 {
1975 { 0xa000, BRANCH | DELAY } /* bra label */
1976 };
1977
1978 static const struct sh_minor_opcode sh_opcodea[] =
1979 {
1980 { MAP (sh_opcodea0), 0xf000 }
1981 };
1982
1983 static const struct sh_opcode sh_opcodeb0[] =
1984 {
1985 { 0xb000, BRANCH | DELAY } /* bsr label */
1986 };
1987
1988 static const struct sh_minor_opcode sh_opcodeb[] =
1989 {
1990 { MAP (sh_opcodeb0), 0xf000 }
1991 };
1992
1993 static const struct sh_opcode sh_opcodec0[] =
1994 {
1995 { 0xc000, STORE | USESR0 | USESSP }, /* mov.b r0,@(disp,gbr) */
1996 { 0xc100, STORE | USESR0 | USESSP }, /* mov.w r0,@(disp,gbr) */
1997 { 0xc200, STORE | USESR0 | USESSP }, /* mov.l r0,@(disp,gbr) */
1998 { 0xc300, BRANCH | USESSP }, /* trapa #imm */
1999 { 0xc400, LOAD | SETSR0 | USESSP }, /* mov.b @(disp,gbr),r0 */
2000 { 0xc500, LOAD | SETSR0 | USESSP }, /* mov.w @(disp,gbr),r0 */
2001 { 0xc600, LOAD | SETSR0 | USESSP }, /* mov.l @(disp,gbr),r0 */
2002 { 0xc700, SETSR0 }, /* mova @(disp,pc),r0 */
2003 { 0xc800, SETSSP | USESR0 }, /* tst #imm,r0 */
2004 { 0xc900, SETSR0 | USESR0 }, /* and #imm,r0 */
2005 { 0xca00, SETSR0 | USESR0 }, /* xor #imm,r0 */
2006 { 0xcb00, SETSR0 | USESR0 }, /* or #imm,r0 */
2007 { 0xcc00, LOAD | SETSSP | USESR0 | USESSP }, /* tst.b #imm,@(r0,gbr) */
2008 { 0xcd00, LOAD | STORE | USESR0 | USESSP }, /* and.b #imm,@(r0,gbr) */
2009 { 0xce00, LOAD | STORE | USESR0 | USESSP }, /* xor.b #imm,@(r0,gbr) */
2010 { 0xcf00, LOAD | STORE | USESR0 | USESSP } /* or.b #imm,@(r0,gbr) */
2011 };
2012
2013 static const struct sh_minor_opcode sh_opcodec[] =
2014 {
2015 { MAP (sh_opcodec0), 0xff00 }
2016 };
2017
2018 static const struct sh_opcode sh_opcoded0[] =
2019 {
2020 { 0xd000, LOAD | SETS1 } /* mov.l @(disp,pc),rn */
2021 };
2022
2023 static const struct sh_minor_opcode sh_opcoded[] =
2024 {
2025 { MAP (sh_opcoded0), 0xf000 }
2026 };
2027
2028 static const struct sh_opcode sh_opcodee0[] =
2029 {
2030 { 0xe000, SETS1 } /* mov #imm,rn */
2031 };
2032
2033 static const struct sh_minor_opcode sh_opcodee[] =
2034 {
2035 { MAP (sh_opcodee0), 0xf000 }
2036 };
2037
2038 static const struct sh_opcode sh_opcodef0[] =
2039 {
2040 { 0xf000, SETSF1 | USESF1 | USESF2 }, /* fadd fm,fn */
2041 { 0xf001, SETSF1 | USESF1 | USESF2 }, /* fsub fm,fn */
2042 { 0xf002, SETSF1 | USESF1 | USESF2 }, /* fmul fm,fn */
2043 { 0xf003, SETSF1 | USESF1 | USESF2 }, /* fdiv fm,fn */
2044 { 0xf004, SETSSP | USESF1 | USESF2 }, /* fcmp/eq fm,fn */
2045 { 0xf005, SETSSP | USESF1 | USESF2 }, /* fcmp/gt fm,fn */
2046 { 0xf006, LOAD | SETSF1 | USES2 | USESR0 }, /* fmov.s @(r0,rm),fn */
2047 { 0xf007, STORE | USES1 | USESF2 | USESR0 }, /* fmov.s fm,@(r0,rn) */
2048 { 0xf008, LOAD | SETSF1 | USES2 }, /* fmov.s @rm,fn */
2049 { 0xf009, LOAD | SETS2 | SETSF1 | USES2 }, /* fmov.s @rm+,fn */
2050 { 0xf00a, STORE | USES1 | USESF2 }, /* fmov.s fm,@rn */
2051 { 0xf00b, STORE | SETS1 | USES1 | USESF2 }, /* fmov.s fm,@-rn */
2052 { 0xf00c, SETSF1 | USESF2 }, /* fmov fm,fn */
2053 { 0xf00e, SETSF1 | USESF1 | USESF2 | USESF0 } /* fmac f0,fm,fn */
2054 };
2055
2056 static const struct sh_opcode sh_opcodef1[] =
2057 {
2058 { 0xf00d, SETSF1 | USESSP }, /* fsts fpul,fn */
2059 { 0xf01d, SETSSP | USESF1 }, /* flds fn,fpul */
2060 { 0xf02d, SETSF1 | USESSP }, /* float fpul,fn */
2061 { 0xf03d, SETSSP | USESF1 }, /* ftrc fn,fpul */
2062 { 0xf04d, SETSF1 | USESF1 }, /* fneg fn */
2063 { 0xf05d, SETSF1 | USESF1 }, /* fabs fn */
2064 { 0xf06d, SETSF1 | USESF1 }, /* fsqrt fn */
2065 { 0xf07d, SETSSP | USESF1 }, /* ftst/nan fn */
2066 { 0xf08d, SETSF1 }, /* fldi0 fn */
2067 { 0xf09d, SETSF1 } /* fldi1 fn */
2068 };
2069
2070 static const struct sh_minor_opcode sh_opcodef[] =
2071 {
2072 { MAP (sh_opcodef0), 0xf00f },
2073 { MAP (sh_opcodef1), 0xf0ff }
2074 };
2075
2076 static struct sh_major_opcode sh_opcodes[] =
2077 {
2078 { MAP (sh_opcode0) },
2079 { MAP (sh_opcode1) },
2080 { MAP (sh_opcode2) },
2081 { MAP (sh_opcode3) },
2082 { MAP (sh_opcode4) },
2083 { MAP (sh_opcode5) },
2084 { MAP (sh_opcode6) },
2085 { MAP (sh_opcode7) },
2086 { MAP (sh_opcode8) },
2087 { MAP (sh_opcode9) },
2088 { MAP (sh_opcodea) },
2089 { MAP (sh_opcodeb) },
2090 { MAP (sh_opcodec) },
2091 { MAP (sh_opcoded) },
2092 { MAP (sh_opcodee) },
2093 { MAP (sh_opcodef) }
2094 };
2095
2096 /* The double data transfer / parallel processing insns are not
2097 described here. This will cause sh_align_load_span to leave them alone. */
2098
2099 static const struct sh_opcode sh_dsp_opcodef0[] =
2100 {
2101 { 0xf400, USESAS | SETSAS | LOAD | SETSSP }, /* movs.x @-as,ds */
2102 { 0xf401, USESAS | SETSAS | STORE | USESSP }, /* movs.x ds,@-as */
2103 { 0xf404, USESAS | LOAD | SETSSP }, /* movs.x @as,ds */
2104 { 0xf405, USESAS | STORE | USESSP }, /* movs.x ds,@as */
2105 { 0xf408, USESAS | SETSAS | LOAD | SETSSP }, /* movs.x @as+,ds */
2106 { 0xf409, USESAS | SETSAS | STORE | USESSP }, /* movs.x ds,@as+ */
2107 { 0xf40c, USESAS | SETSAS | LOAD | SETSSP | USESR8 }, /* movs.x @as+r8,ds */
2108 { 0xf40d, USESAS | SETSAS | STORE | USESSP | USESR8 } /* movs.x ds,@as+r8 */
2109 };
2110
2111 static const struct sh_minor_opcode sh_dsp_opcodef[] =
2112 {
2113 { MAP (sh_dsp_opcodef0), 0xfc0d }
2114 };
2115
2116 #ifndef COFF_IMAGE_WITH_PE
2117 /* Given an instruction, return a pointer to the corresponding
2118 sh_opcode structure. Return NULL if the instruction is not
2119 recognized. */
2120
2121 static const struct sh_opcode *
2122 sh_insn_info (insn)
2123 unsigned int insn;
2124 {
2125 const struct sh_major_opcode *maj;
2126 const struct sh_minor_opcode *min, *minend;
2127
2128 maj = &sh_opcodes[(insn & 0xf000) >> 12];
2129 min = maj->minor_opcodes;
2130 minend = min + maj->count;
2131 for (; min < minend; min++)
2132 {
2133 unsigned int l;
2134 const struct sh_opcode *op, *opend;
2135
2136 l = insn & min->mask;
2137 op = min->opcodes;
2138 opend = op + min->count;
2139
2140 /* Since the opcodes tables are sorted, we could use a binary
2141 search here if the count were above some cutoff value. */
2142 for (; op < opend; op++)
2143 if (op->opcode == l)
2144 return op;
2145 }
2146
2147 return NULL;
2148 }
2149
2150 /* See whether an instruction uses or sets a general purpose register */
2151
2152 static boolean
2153 sh_insn_uses_or_sets_reg (insn, op, reg)
2154 unsigned int insn;
2155 const struct sh_opcode *op;
2156 unsigned int reg;
2157 {
2158 if (sh_insn_uses_reg (insn, op, reg))
2159 return true;
2160
2161 return sh_insn_sets_reg (insn, op, reg);
2162 }
2163
2164 /* See whether an instruction uses a general purpose register. */
2165
2166 static boolean
2167 sh_insn_uses_reg (insn, op, reg)
2168 unsigned int insn;
2169 const struct sh_opcode *op;
2170 unsigned int reg;
2171 {
2172 unsigned int f;
2173
2174 f = op->flags;
2175
2176 if ((f & USES1) != 0
2177 && USES1_REG (insn) == reg)
2178 return true;
2179 if ((f & USES2) != 0
2180 && USES2_REG (insn) == reg)
2181 return true;
2182 if ((f & USESR0) != 0
2183 && reg == 0)
2184 return true;
2185 if ((f & USESAS) && reg == USESAS_REG (insn))
2186 return true;
2187 if ((f & USESR8) && reg == 8)
2188 return true;
2189
2190 return false;
2191 }
2192
2193 /* See whether an instruction sets a general purpose register. */
2194
2195 static boolean
2196 sh_insn_sets_reg (insn, op, reg)
2197 unsigned int insn;
2198 const struct sh_opcode *op;
2199 unsigned int reg;
2200 {
2201 unsigned int f;
2202
2203 f = op->flags;
2204
2205 if ((f & SETS1) != 0
2206 && SETS1_REG (insn) == reg)
2207 return true;
2208 if ((f & SETS2) != 0
2209 && SETS2_REG (insn) == reg)
2210 return true;
2211 if ((f & SETSR0) != 0
2212 && reg == 0)
2213 return true;
2214 if ((f & SETSAS) && reg == SETSAS_REG (insn))
2215 return true;
2216
2217 return false;
2218 }
2219
2220 /* See whether an instruction uses or sets a floating point register */
2221
2222 static boolean
2223 sh_insn_uses_or_sets_freg (insn, op, reg)
2224 unsigned int insn;
2225 const struct sh_opcode *op;
2226 unsigned int reg;
2227 {
2228 if (sh_insn_uses_freg (insn, op, reg))
2229 return true;
2230
2231 return sh_insn_sets_freg (insn, op, reg);
2232 }
2233
2234 /* See whether an instruction uses a floating point register. */
2235
2236 static boolean
2237 sh_insn_uses_freg (insn, op, freg)
2238 unsigned int insn;
2239 const struct sh_opcode *op;
2240 unsigned int freg;
2241 {
2242 unsigned int f;
2243
2244 f = op->flags;
2245
2246 /* We can't tell if this is a double-precision insn, so just play safe
2247 and assume that it might be. So not only have we test FREG against
2248 itself, but also even FREG against FREG+1 - if the using insn uses
2249 just the low part of a double precision value - but also an odd
2250 FREG against FREG-1 - if the setting insn sets just the low part
2251 of a double precision value.
2252 So what this all boils down to is that we have to ignore the lowest
2253 bit of the register number. */
2254
2255 if ((f & USESF1) != 0
2256 && (USESF1_REG (insn) & 0xe) == (freg & 0xe))
2257 return true;
2258 if ((f & USESF2) != 0
2259 && (USESF2_REG (insn) & 0xe) == (freg & 0xe))
2260 return true;
2261 if ((f & USESF0) != 0
2262 && freg == 0)
2263 return true;
2264
2265 return false;
2266 }
2267
2268 /* See whether an instruction sets a floating point register. */
2269
2270 static boolean
2271 sh_insn_sets_freg (insn, op, freg)
2272 unsigned int insn;
2273 const struct sh_opcode *op;
2274 unsigned int freg;
2275 {
2276 unsigned int f;
2277
2278 f = op->flags;
2279
2280 /* We can't tell if this is a double-precision insn, so just play safe
2281 and assume that it might be. So not only have we test FREG against
2282 itself, but also even FREG against FREG+1 - if the using insn uses
2283 just the low part of a double precision value - but also an odd
2284 FREG against FREG-1 - if the setting insn sets just the low part
2285 of a double precision value.
2286 So what this all boils down to is that we have to ignore the lowest
2287 bit of the register number. */
2288
2289 if ((f & SETSF1) != 0
2290 && (SETSF1_REG (insn) & 0xe) == (freg & 0xe))
2291 return true;
2292
2293 return false;
2294 }
2295
2296 /* See whether instructions I1 and I2 conflict, assuming I1 comes
2297 before I2. OP1 and OP2 are the corresponding sh_opcode structures.
2298 This should return true if there is a conflict, or false if the
2299 instructions can be swapped safely. */
2300
2301 static boolean
2302 sh_insns_conflict (i1, op1, i2, op2)
2303 unsigned int i1;
2304 const struct sh_opcode *op1;
2305 unsigned int i2;
2306 const struct sh_opcode *op2;
2307 {
2308 unsigned int f1, f2;
2309
2310 f1 = op1->flags;
2311 f2 = op2->flags;
2312
2313 /* Load of fpscr conflicts with floating point operations.
2314 FIXME: shouldn't test raw opcodes here. */
2315 if (((i1 & 0xf0ff) == 0x4066 && (i2 & 0xf000) == 0xf000)
2316 || ((i2 & 0xf0ff) == 0x4066 && (i1 & 0xf000) == 0xf000))
2317 return true;
2318
2319 if ((f1 & (BRANCH | DELAY)) != 0
2320 || (f2 & (BRANCH | DELAY)) != 0)
2321 return true;
2322
2323 if (((f1 | f2) & SETSSP)
2324 && (f1 & (SETSSP | USESSP))
2325 && (f2 & (SETSSP | USESSP)))
2326 return true;
2327
2328 if ((f1 & SETS1) != 0
2329 && sh_insn_uses_or_sets_reg (i2, op2, SETS1_REG (i1)))
2330 return true;
2331 if ((f1 & SETS2) != 0
2332 && sh_insn_uses_or_sets_reg (i2, op2, SETS2_REG (i1)))
2333 return true;
2334 if ((f1 & SETSR0) != 0
2335 && sh_insn_uses_or_sets_reg (i2, op2, 0))
2336 return true;
2337 if ((f1 & SETSAS)
2338 && sh_insn_uses_or_sets_reg (i2, op2, SETSAS_REG (i1)))
2339 return true;
2340 if ((f1 & SETSF1) != 0
2341 && sh_insn_uses_or_sets_freg (i2, op2, SETSF1_REG (i1)))
2342 return true;
2343
2344 if ((f2 & SETS1) != 0
2345 && sh_insn_uses_or_sets_reg (i1, op1, SETS1_REG (i2)))
2346 return true;
2347 if ((f2 & SETS2) != 0
2348 && sh_insn_uses_or_sets_reg (i1, op1, SETS2_REG (i2)))
2349 return true;
2350 if ((f2 & SETSR0) != 0
2351 && sh_insn_uses_or_sets_reg (i1, op1, 0))
2352 return true;
2353 if ((f2 & SETSAS)
2354 && sh_insn_uses_or_sets_reg (i1, op1, SETSAS_REG (i2)))
2355 return true;
2356 if ((f2 & SETSF1) != 0
2357 && sh_insn_uses_or_sets_freg (i1, op1, SETSF1_REG (i2)))
2358 return true;
2359
2360 /* The instructions do not conflict. */
2361 return false;
2362 }
2363
2364 /* I1 is a load instruction, and I2 is some other instruction. Return
2365 true if I1 loads a register which I2 uses. */
2366
2367 static boolean
2368 sh_load_use (i1, op1, i2, op2)
2369 unsigned int i1;
2370 const struct sh_opcode *op1;
2371 unsigned int i2;
2372 const struct sh_opcode *op2;
2373 {
2374 unsigned int f1;
2375
2376 f1 = op1->flags;
2377
2378 if ((f1 & LOAD) == 0)
2379 return false;
2380
2381 /* If both SETS1 and SETSSP are set, that means a load to a special
2382 register using postincrement addressing mode, which we don't care
2383 about here. */
2384 if ((f1 & SETS1) != 0
2385 && (f1 & SETSSP) == 0
2386 && sh_insn_uses_reg (i2, op2, (i1 & 0x0f00) >> 8))
2387 return true;
2388
2389 if ((f1 & SETSR0) != 0
2390 && sh_insn_uses_reg (i2, op2, 0))
2391 return true;
2392
2393 if ((f1 & SETSF1) != 0
2394 && sh_insn_uses_freg (i2, op2, (i1 & 0x0f00) >> 8))
2395 return true;
2396
2397 return false;
2398 }
2399
2400 /* Try to align loads and stores within a span of memory. This is
2401 called by both the ELF and the COFF sh targets. ABFD and SEC are
2402 the BFD and section we are examining. CONTENTS is the contents of
2403 the section. SWAP is the routine to call to swap two instructions.
2404 RELOCS is a pointer to the internal relocation information, to be
2405 passed to SWAP. PLABEL is a pointer to the current label in a
2406 sorted list of labels; LABEL_END is the end of the list. START and
2407 STOP are the range of memory to examine. If a swap is made,
2408 *PSWAPPED is set to true. */
2409
2410 #ifdef COFF_WITH_PE
2411 static
2412 #endif
2413 boolean
2414 _bfd_sh_align_load_span (abfd, sec, contents, swap, relocs,
2415 plabel, label_end, start, stop, pswapped)
2416 bfd *abfd;
2417 asection *sec;
2418 bfd_byte *contents;
2419 boolean (*swap) PARAMS ((bfd *, asection *, PTR, bfd_byte *, bfd_vma));
2420 PTR relocs;
2421 bfd_vma **plabel;
2422 bfd_vma *label_end;
2423 bfd_vma start;
2424 bfd_vma stop;
2425 boolean *pswapped;
2426 {
2427 int dsp = (abfd->arch_info->mach == bfd_mach_sh_dsp
2428 || abfd->arch_info->mach == bfd_mach_sh3_dsp);
2429 bfd_vma i;
2430
2431 /* The SH4 has a Harvard architecture, hence aligning loads is not
2432 desirable. In fact, it is counter-productive, since it interferes
2433 with the schedules generated by the compiler. */
2434 if (abfd->arch_info->mach == bfd_mach_sh4)
2435 return true;
2436
2437 /* If we are linking sh[3]-dsp code, swap the FPU instructions for DSP
2438 instructions. */
2439 if (dsp)
2440 {
2441 sh_opcodes[0xf].minor_opcodes = sh_dsp_opcodef;
2442 sh_opcodes[0xf].count = sizeof sh_dsp_opcodef / sizeof sh_dsp_opcodef;
2443 }
2444
2445 /* Instructions should be aligned on 2 byte boundaries. */
2446 if ((start & 1) == 1)
2447 ++start;
2448
2449 /* Now look through the unaligned addresses. */
2450 i = start;
2451 if ((i & 2) == 0)
2452 i += 2;
2453 for (; i < stop; i += 4)
2454 {
2455 unsigned int insn;
2456 const struct sh_opcode *op;
2457 unsigned int prev_insn = 0;
2458 const struct sh_opcode *prev_op = NULL;
2459
2460 insn = bfd_get_16 (abfd, contents + i);
2461 op = sh_insn_info (insn);
2462 if (op == NULL
2463 || (op->flags & (LOAD | STORE)) == 0)
2464 continue;
2465
2466 /* This is a load or store which is not on a four byte boundary. */
2467
2468 while (*plabel < label_end && **plabel < i)
2469 ++*plabel;
2470
2471 if (i > start)
2472 {
2473 prev_insn = bfd_get_16 (abfd, contents + i - 2);
2474 /* If INSN is the field b of a parallel processing insn, it is not
2475 a load / store after all. Note that the test here might mistake
2476 the field_b of a pcopy insn for the starting code of a parallel
2477 processing insn; this might miss a swapping opportunity, but at
2478 least we're on the safe side. */
2479 if (dsp && (prev_insn & 0xfc00) == 0xf800)
2480 continue;
2481
2482 /* Check if prev_insn is actually the field b of a parallel
2483 processing insn. Again, this can give a spurious match
2484 after a pcopy. */
2485 if (dsp && i - 2 > start)
2486 {
2487 unsigned pprev_insn = bfd_get_16 (abfd, contents + i - 4);
2488
2489 if ((pprev_insn & 0xfc00) == 0xf800)
2490 prev_op = NULL;
2491 else
2492 prev_op = sh_insn_info (prev_insn);
2493 }
2494 else
2495 prev_op = sh_insn_info (prev_insn);
2496
2497 /* If the load/store instruction is in a delay slot, we
2498 can't swap. */
2499 if (prev_op == NULL
2500 || (prev_op->flags & DELAY) != 0)
2501 continue;
2502 }
2503 if (i > start
2504 && (*plabel >= label_end || **plabel != i)
2505 && prev_op != NULL
2506 && (prev_op->flags & (LOAD | STORE)) == 0
2507 && ! sh_insns_conflict (prev_insn, prev_op, insn, op))
2508 {
2509 boolean ok;
2510
2511 /* The load/store instruction does not have a label, and
2512 there is a previous instruction; PREV_INSN is not
2513 itself a load/store instruction, and PREV_INSN and
2514 INSN do not conflict. */
2515
2516 ok = true;
2517
2518 if (i >= start + 4)
2519 {
2520 unsigned int prev2_insn;
2521 const struct sh_opcode *prev2_op;
2522
2523 prev2_insn = bfd_get_16 (abfd, contents + i - 4);
2524 prev2_op = sh_insn_info (prev2_insn);
2525
2526 /* If the instruction before PREV_INSN has a delay
2527 slot--that is, PREV_INSN is in a delay slot--we
2528 can not swap. */
2529 if (prev2_op == NULL
2530 || (prev2_op->flags & DELAY) != 0)
2531 ok = false;
2532
2533 /* If the instruction before PREV_INSN is a load,
2534 and it sets a register which INSN uses, then
2535 putting INSN immediately after PREV_INSN will
2536 cause a pipeline bubble, so there is no point to
2537 making the swap. */
2538 if (ok
2539 && (prev2_op->flags & LOAD) != 0
2540 && sh_load_use (prev2_insn, prev2_op, insn, op))
2541 ok = false;
2542 }
2543
2544 if (ok)
2545 {
2546 if (! (*swap) (abfd, sec, relocs, contents, i - 2))
2547 return false;
2548 *pswapped = true;
2549 continue;
2550 }
2551 }
2552
2553 while (*plabel < label_end && **plabel < i + 2)
2554 ++*plabel;
2555
2556 if (i + 2 < stop
2557 && (*plabel >= label_end || **plabel != i + 2))
2558 {
2559 unsigned int next_insn;
2560 const struct sh_opcode *next_op;
2561
2562 /* There is an instruction after the load/store
2563 instruction, and it does not have a label. */
2564 next_insn = bfd_get_16 (abfd, contents + i + 2);
2565 next_op = sh_insn_info (next_insn);
2566 if (next_op != NULL
2567 && (next_op->flags & (LOAD | STORE)) == 0
2568 && ! sh_insns_conflict (insn, op, next_insn, next_op))
2569 {
2570 boolean ok;
2571
2572 /* NEXT_INSN is not itself a load/store instruction,
2573 and it does not conflict with INSN. */
2574
2575 ok = true;
2576
2577 /* If PREV_INSN is a load, and it sets a register
2578 which NEXT_INSN uses, then putting NEXT_INSN
2579 immediately after PREV_INSN will cause a pipeline
2580 bubble, so there is no reason to make this swap. */
2581 if (prev_op != NULL
2582 && (prev_op->flags & LOAD) != 0
2583 && sh_load_use (prev_insn, prev_op, next_insn, next_op))
2584 ok = false;
2585
2586 /* If INSN is a load, and it sets a register which
2587 the insn after NEXT_INSN uses, then doing the
2588 swap will cause a pipeline bubble, so there is no
2589 reason to make the swap. However, if the insn
2590 after NEXT_INSN is itself a load or store
2591 instruction, then it is misaligned, so
2592 optimistically hope that it will be swapped
2593 itself, and just live with the pipeline bubble if
2594 it isn't. */
2595 if (ok
2596 && i + 4 < stop
2597 && (op->flags & LOAD) != 0)
2598 {
2599 unsigned int next2_insn;
2600 const struct sh_opcode *next2_op;
2601
2602 next2_insn = bfd_get_16 (abfd, contents + i + 4);
2603 next2_op = sh_insn_info (next2_insn);
2604 if ((next2_op->flags & (LOAD | STORE)) == 0
2605 && sh_load_use (insn, op, next2_insn, next2_op))
2606 ok = false;
2607 }
2608
2609 if (ok)
2610 {
2611 if (! (*swap) (abfd, sec, relocs, contents, i))
2612 return false;
2613 *pswapped = true;
2614 continue;
2615 }
2616 }
2617 }
2618 }
2619
2620 return true;
2621 }
2622 #endif /* not COFF_IMAGE_WITH_PE */
2623
2624 /* Look for loads and stores which we can align to four byte
2625 boundaries. See the longer comment above sh_relax_section for why
2626 this is desirable. This sets *PSWAPPED if some instruction was
2627 swapped. */
2628
2629 static boolean
2630 sh_align_loads (abfd, sec, internal_relocs, contents, pswapped)
2631 bfd *abfd;
2632 asection *sec;
2633 struct internal_reloc *internal_relocs;
2634 bfd_byte *contents;
2635 boolean *pswapped;
2636 {
2637 struct internal_reloc *irel, *irelend;
2638 bfd_vma *labels = NULL;
2639 bfd_vma *label, *label_end;
2640
2641 *pswapped = false;
2642
2643 irelend = internal_relocs + sec->reloc_count;
2644
2645 /* Get all the addresses with labels on them. */
2646 labels = (bfd_vma *) bfd_malloc (sec->reloc_count * sizeof (bfd_vma));
2647 if (labels == NULL)
2648 goto error_return;
2649 label_end = labels;
2650 for (irel = internal_relocs; irel < irelend; irel++)
2651 {
2652 if (irel->r_type == R_SH_LABEL)
2653 {
2654 *label_end = irel->r_vaddr - sec->vma;
2655 ++label_end;
2656 }
2657 }
2658
2659 /* Note that the assembler currently always outputs relocs in
2660 address order. If that ever changes, this code will need to sort
2661 the label values and the relocs. */
2662
2663 label = labels;
2664
2665 for (irel = internal_relocs; irel < irelend; irel++)
2666 {
2667 bfd_vma start, stop;
2668
2669 if (irel->r_type != R_SH_CODE)
2670 continue;
2671
2672 start = irel->r_vaddr - sec->vma;
2673
2674 for (irel++; irel < irelend; irel++)
2675 if (irel->r_type == R_SH_DATA)
2676 break;
2677 if (irel < irelend)
2678 stop = irel->r_vaddr - sec->vma;
2679 else
2680 stop = sec->_cooked_size;
2681
2682 if (! _bfd_sh_align_load_span (abfd, sec, contents, sh_swap_insns,
2683 (PTR) internal_relocs, &label,
2684 label_end, start, stop, pswapped))
2685 goto error_return;
2686 }
2687
2688 free (labels);
2689
2690 return true;
2691
2692 error_return:
2693 if (labels != NULL)
2694 free (labels);
2695 return false;
2696 }
2697
2698 /* Swap two SH instructions. */
2699
2700 static boolean
2701 sh_swap_insns (abfd, sec, relocs, contents, addr)
2702 bfd *abfd;
2703 asection *sec;
2704 PTR relocs;
2705 bfd_byte *contents;
2706 bfd_vma addr;
2707 {
2708 struct internal_reloc *internal_relocs = (struct internal_reloc *) relocs;
2709 unsigned short i1, i2;
2710 struct internal_reloc *irel, *irelend;
2711
2712 /* Swap the instructions themselves. */
2713 i1 = bfd_get_16 (abfd, contents + addr);
2714 i2 = bfd_get_16 (abfd, contents + addr + 2);
2715 bfd_put_16 (abfd, i2, contents + addr);
2716 bfd_put_16 (abfd, i1, contents + addr + 2);
2717
2718 /* Adjust all reloc addresses. */
2719 irelend = internal_relocs + sec->reloc_count;
2720 for (irel = internal_relocs; irel < irelend; irel++)
2721 {
2722 int type, add;
2723
2724 /* There are a few special types of relocs that we don't want to
2725 adjust. These relocs do not apply to the instruction itself,
2726 but are only associated with the address. */
2727 type = irel->r_type;
2728 if (type == R_SH_ALIGN
2729 || type == R_SH_CODE
2730 || type == R_SH_DATA
2731 || type == R_SH_LABEL)
2732 continue;
2733
2734 /* If an R_SH_USES reloc points to one of the addresses being
2735 swapped, we must adjust it. It would be incorrect to do this
2736 for a jump, though, since we want to execute both
2737 instructions after the jump. (We have avoided swapping
2738 around a label, so the jump will not wind up executing an
2739 instruction it shouldn't). */
2740 if (type == R_SH_USES)
2741 {
2742 bfd_vma off;
2743
2744 off = irel->r_vaddr - sec->vma + 4 + irel->r_offset;
2745 if (off == addr)
2746 irel->r_offset += 2;
2747 else if (off == addr + 2)
2748 irel->r_offset -= 2;
2749 }
2750
2751 if (irel->r_vaddr - sec->vma == addr)
2752 {
2753 irel->r_vaddr += 2;
2754 add = -2;
2755 }
2756 else if (irel->r_vaddr - sec->vma == addr + 2)
2757 {
2758 irel->r_vaddr -= 2;
2759 add = 2;
2760 }
2761 else
2762 add = 0;
2763
2764 if (add != 0)
2765 {
2766 bfd_byte *loc;
2767 unsigned short insn, oinsn;
2768 boolean overflow;
2769
2770 loc = contents + irel->r_vaddr - sec->vma;
2771 overflow = false;
2772 switch (type)
2773 {
2774 default:
2775 break;
2776
2777 case R_SH_PCDISP8BY2:
2778 case R_SH_PCRELIMM8BY2:
2779 insn = bfd_get_16 (abfd, loc);
2780 oinsn = insn;
2781 insn += add / 2;
2782 if ((oinsn & 0xff00) != (insn & 0xff00))
2783 overflow = true;
2784 bfd_put_16 (abfd, insn, loc);
2785 break;
2786
2787 case R_SH_PCDISP:
2788 insn = bfd_get_16 (abfd, loc);
2789 oinsn = insn;
2790 insn += add / 2;
2791 if ((oinsn & 0xf000) != (insn & 0xf000))
2792 overflow = true;
2793 bfd_put_16 (abfd, insn, loc);
2794 break;
2795
2796 case R_SH_PCRELIMM8BY4:
2797 /* This reloc ignores the least significant 3 bits of
2798 the program counter before adding in the offset.
2799 This means that if ADDR is at an even address, the
2800 swap will not affect the offset. If ADDR is an at an
2801 odd address, then the instruction will be crossing a
2802 four byte boundary, and must be adjusted. */
2803 if ((addr & 3) != 0)
2804 {
2805 insn = bfd_get_16 (abfd, loc);
2806 oinsn = insn;
2807 insn += add / 2;
2808 if ((oinsn & 0xff00) != (insn & 0xff00))
2809 overflow = true;
2810 bfd_put_16 (abfd, insn, loc);
2811 }
2812
2813 break;
2814 }
2815
2816 if (overflow)
2817 {
2818 ((*_bfd_error_handler)
2819 ("%s: 0x%lx: fatal: reloc overflow while relaxing",
2820 bfd_get_filename (abfd), (unsigned long) irel->r_vaddr));
2821 bfd_set_error (bfd_error_bad_value);
2822 return false;
2823 }
2824 }
2825 }
2826
2827 return true;
2828 }
2829 \f
2830 /* This is a modification of _bfd_coff_generic_relocate_section, which
2831 will handle SH relaxing. */
2832
2833 static boolean
2834 sh_relocate_section (output_bfd, info, input_bfd, input_section, contents,
2835 relocs, syms, sections)
2836 bfd *output_bfd ATTRIBUTE_UNUSED;
2837 struct bfd_link_info *info;
2838 bfd *input_bfd;
2839 asection *input_section;
2840 bfd_byte *contents;
2841 struct internal_reloc *relocs;
2842 struct internal_syment *syms;
2843 asection **sections;
2844 {
2845 struct internal_reloc *rel;
2846 struct internal_reloc *relend;
2847
2848 rel = relocs;
2849 relend = rel + input_section->reloc_count;
2850 for (; rel < relend; rel++)
2851 {
2852 long symndx;
2853 struct coff_link_hash_entry *h;
2854 struct internal_syment *sym;
2855 bfd_vma addend;
2856 bfd_vma val;
2857 reloc_howto_type *howto;
2858 bfd_reloc_status_type rstat;
2859
2860 /* Almost all relocs have to do with relaxing. If any work must
2861 be done for them, it has been done in sh_relax_section. */
2862 if (rel->r_type != R_SH_IMM32
2863 #ifdef COFF_WITH_PE
2864 && rel->r_type != R_SH_IMM32CE
2865 && rel->r_type != R_SH_IMAGEBASE
2866 #endif
2867 && rel->r_type != R_SH_PCDISP)
2868 continue;
2869
2870 symndx = rel->r_symndx;
2871
2872 if (symndx == -1)
2873 {
2874 h = NULL;
2875 sym = NULL;
2876 }
2877 else
2878 {
2879 if (symndx < 0
2880 || (unsigned long) symndx >= obj_raw_syment_count (input_bfd))
2881 {
2882 (*_bfd_error_handler)
2883 ("%s: illegal symbol index %ld in relocs",
2884 bfd_get_filename (input_bfd), symndx);
2885 bfd_set_error (bfd_error_bad_value);
2886 return false;
2887 }
2888 h = obj_coff_sym_hashes (input_bfd)[symndx];
2889 sym = syms + symndx;
2890 }
2891
2892 if (sym != NULL && sym->n_scnum != 0)
2893 addend = - sym->n_value;
2894 else
2895 addend = 0;
2896
2897 if (rel->r_type == R_SH_PCDISP)
2898 addend -= 4;
2899
2900 if (rel->r_type >= SH_COFF_HOWTO_COUNT)
2901 howto = NULL;
2902 else
2903 howto = &sh_coff_howtos[rel->r_type];
2904
2905 if (howto == NULL)
2906 {
2907 bfd_set_error (bfd_error_bad_value);
2908 return false;
2909 }
2910
2911 #ifdef COFF_WITH_PE
2912 if (rel->r_type == R_SH_IMAGEBASE)
2913 addend -= pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase;
2914 #endif
2915
2916 val = 0;
2917
2918 if (h == NULL)
2919 {
2920 asection *sec;
2921
2922 /* There is nothing to do for an internal PCDISP reloc. */
2923 if (rel->r_type == R_SH_PCDISP)
2924 continue;
2925
2926 if (symndx == -1)
2927 {
2928 sec = bfd_abs_section_ptr;
2929 val = 0;
2930 }
2931 else
2932 {
2933 sec = sections[symndx];
2934 val = (sec->output_section->vma
2935 + sec->output_offset
2936 + sym->n_value
2937 - sec->vma);
2938 }
2939 }
2940 else
2941 {
2942 if (h->root.type == bfd_link_hash_defined
2943 || h->root.type == bfd_link_hash_defweak)
2944 {
2945 asection *sec;
2946
2947 sec = h->root.u.def.section;
2948 val = (h->root.u.def.value
2949 + sec->output_section->vma
2950 + sec->output_offset);
2951 }
2952 else if (! info->relocateable)
2953 {
2954 if (! ((*info->callbacks->undefined_symbol)
2955 (info, h->root.root.string, input_bfd, input_section,
2956 rel->r_vaddr - input_section->vma, true)))
2957 return false;
2958 }
2959 }
2960
2961 rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
2962 contents,
2963 rel->r_vaddr - input_section->vma,
2964 val, addend);
2965
2966 switch (rstat)
2967 {
2968 default:
2969 abort ();
2970 case bfd_reloc_ok:
2971 break;
2972 case bfd_reloc_overflow:
2973 {
2974 const char *name;
2975 char buf[SYMNMLEN + 1];
2976
2977 if (symndx == -1)
2978 name = "*ABS*";
2979 else if (h != NULL)
2980 name = h->root.root.string;
2981 else if (sym->_n._n_n._n_zeroes == 0
2982 && sym->_n._n_n._n_offset != 0)
2983 name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset;
2984 else
2985 {
2986 strncpy (buf, sym->_n._n_name, SYMNMLEN);
2987 buf[SYMNMLEN] = '\0';
2988 name = buf;
2989 }
2990
2991 if (! ((*info->callbacks->reloc_overflow)
2992 (info, name, howto->name, (bfd_vma) 0, input_bfd,
2993 input_section, rel->r_vaddr - input_section->vma)))
2994 return false;
2995 }
2996 }
2997 }
2998
2999 return true;
3000 }
3001
3002 /* This is a version of bfd_generic_get_relocated_section_contents
3003 which uses sh_relocate_section. */
3004
3005 static bfd_byte *
3006 sh_coff_get_relocated_section_contents (output_bfd, link_info, link_order,
3007 data, relocateable, symbols)
3008 bfd *output_bfd;
3009 struct bfd_link_info *link_info;
3010 struct bfd_link_order *link_order;
3011 bfd_byte *data;
3012 boolean relocateable;
3013 asymbol **symbols;
3014 {
3015 asection *input_section = link_order->u.indirect.section;
3016 bfd *input_bfd = input_section->owner;
3017 asection **sections = NULL;
3018 struct internal_reloc *internal_relocs = NULL;
3019 struct internal_syment *internal_syms = NULL;
3020
3021 /* We only need to handle the case of relaxing, or of having a
3022 particular set of section contents, specially. */
3023 if (relocateable
3024 || coff_section_data (input_bfd, input_section) == NULL
3025 || coff_section_data (input_bfd, input_section)->contents == NULL)
3026 return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
3027 link_order, data,
3028 relocateable,
3029 symbols);
3030
3031 memcpy (data, coff_section_data (input_bfd, input_section)->contents,
3032 input_section->_raw_size);
3033
3034 if ((input_section->flags & SEC_RELOC) != 0
3035 && input_section->reloc_count > 0)
3036 {
3037 bfd_size_type symesz = bfd_coff_symesz (input_bfd);
3038 bfd_byte *esym, *esymend;
3039 struct internal_syment *isymp;
3040 asection **secpp;
3041
3042 if (! _bfd_coff_get_external_symbols (input_bfd))
3043 goto error_return;
3044
3045 internal_relocs = (_bfd_coff_read_internal_relocs
3046 (input_bfd, input_section, false, (bfd_byte *) NULL,
3047 false, (struct internal_reloc *) NULL));
3048 if (internal_relocs == NULL)
3049 goto error_return;
3050
3051 internal_syms = ((struct internal_syment *)
3052 bfd_malloc (obj_raw_syment_count (input_bfd)
3053 * sizeof (struct internal_syment)));
3054 if (internal_syms == NULL)
3055 goto error_return;
3056
3057 sections = (asection **) bfd_malloc (obj_raw_syment_count (input_bfd)
3058 * sizeof (asection *));
3059 if (sections == NULL)
3060 goto error_return;
3061
3062 isymp = internal_syms;
3063 secpp = sections;
3064 esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
3065 esymend = esym + obj_raw_syment_count (input_bfd) * symesz;
3066 while (esym < esymend)
3067 {
3068 bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp);
3069
3070 if (isymp->n_scnum != 0)
3071 *secpp = coff_section_from_bfd_index (input_bfd, isymp->n_scnum);
3072 else
3073 {
3074 if (isymp->n_value == 0)
3075 *secpp = bfd_und_section_ptr;
3076 else
3077 *secpp = bfd_com_section_ptr;
3078 }
3079
3080 esym += (isymp->n_numaux + 1) * symesz;
3081 secpp += isymp->n_numaux + 1;
3082 isymp += isymp->n_numaux + 1;
3083 }
3084
3085 if (! sh_relocate_section (output_bfd, link_info, input_bfd,
3086 input_section, data, internal_relocs,
3087 internal_syms, sections))
3088 goto error_return;
3089
3090 free (sections);
3091 sections = NULL;
3092 free (internal_syms);
3093 internal_syms = NULL;
3094 free (internal_relocs);
3095 internal_relocs = NULL;
3096 }
3097
3098 return data;
3099
3100 error_return:
3101 if (internal_relocs != NULL)
3102 free (internal_relocs);
3103 if (internal_syms != NULL)
3104 free (internal_syms);
3105 if (sections != NULL)
3106 free (sections);
3107 return NULL;
3108 }
3109
3110 /* The target vectors. */
3111
3112 #ifndef TARGET_SHL_SYM
3113 CREATE_BIG_COFF_TARGET_VEC (shcoff_vec, "coff-sh", BFD_IS_RELAXABLE, 0, '_', NULL)
3114 #endif
3115
3116 #ifdef TARGET_SHL_SYM
3117 #define TARGET_SYM TARGET_SHL_SYM
3118 #else
3119 #define TARGET_SYM shlcoff_vec
3120 #endif
3121
3122 #ifndef TARGET_SHL_NAME
3123 #define TARGET_SHL_NAME "coff-shl"
3124 #endif
3125
3126 #ifdef COFF_WITH_PE
3127 CREATE_LITTLE_COFF_TARGET_VEC (TARGET_SYM, TARGET_SHL_NAME, BFD_IS_RELAXABLE,
3128 SEC_CODE | SEC_DATA, '_', NULL);
3129 #else
3130 CREATE_LITTLE_COFF_TARGET_VEC (TARGET_SYM, TARGET_SHL_NAME, BFD_IS_RELAXABLE,
3131 0, '_', NULL)
3132 #endif
3133
3134 #ifndef TARGET_SHL_SYM
3135 /* Some people want versions of the SH COFF target which do not align
3136 to 16 byte boundaries. We implement that by adding a couple of new
3137 target vectors. These are just like the ones above, but they
3138 change the default section alignment. To generate them in the
3139 assembler, use -small. To use them in the linker, use -b
3140 coff-sh{l}-small and -oformat coff-sh{l}-small.
3141
3142 Yes, this is a horrible hack. A general solution for setting
3143 section alignment in COFF is rather complex. ELF handles this
3144 correctly. */
3145
3146 /* Only recognize the small versions if the target was not defaulted.
3147 Otherwise we won't recognize the non default endianness. */
3148
3149 static const bfd_target *
3150 coff_small_object_p (abfd)
3151 bfd *abfd;
3152 {
3153 if (abfd->target_defaulted)
3154 {
3155 bfd_set_error (bfd_error_wrong_format);
3156 return NULL;
3157 }
3158 return coff_object_p (abfd);
3159 }
3160
3161 /* Set the section alignment for the small versions. */
3162
3163 static boolean
3164 coff_small_new_section_hook (abfd, section)
3165 bfd *abfd;
3166 asection *section;
3167 {
3168 if (! coff_new_section_hook (abfd, section))
3169 return false;
3170
3171 /* We must align to at least a four byte boundary, because longword
3172 accesses must be on a four byte boundary. */
3173 if (section->alignment_power == COFF_DEFAULT_SECTION_ALIGNMENT_POWER)
3174 section->alignment_power = 2;
3175
3176 return true;
3177 }
3178
3179 /* This is copied from bfd_coff_std_swap_table so that we can change
3180 the default section alignment power. */
3181
3182 static const bfd_coff_backend_data bfd_coff_small_swap_table =
3183 {
3184 coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
3185 coff_swap_aux_out, coff_swap_sym_out,
3186 coff_swap_lineno_out, coff_swap_reloc_out,
3187 coff_swap_filehdr_out, coff_swap_aouthdr_out,
3188 coff_swap_scnhdr_out,
3189 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ, FILNMLEN,
3190 #ifdef COFF_LONG_FILENAMES
3191 true,
3192 #else
3193 false,
3194 #endif
3195 #ifdef COFF_LONG_SECTION_NAMES
3196 true,
3197 #else
3198 false,
3199 #endif
3200 2,
3201 #ifdef COFF_FORCE_SYMBOLS_IN_STRINGS
3202 true,
3203 #else
3204 false,
3205 #endif
3206 #ifdef COFF_DEBUG_STRING_WIDE_PREFIX
3207 4,
3208 #else
3209 2,
3210 #endif
3211 coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
3212 coff_swap_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
3213 coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
3214 coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
3215 coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
3216 coff_classify_symbol, coff_compute_section_file_positions,
3217 coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
3218 coff_adjust_symndx, coff_link_add_one_symbol,
3219 coff_link_output_has_begun, coff_final_link_postscript
3220 };
3221
3222 #define coff_small_close_and_cleanup \
3223 coff_close_and_cleanup
3224 #define coff_small_bfd_free_cached_info \
3225 coff_bfd_free_cached_info
3226 #define coff_small_get_section_contents \
3227 coff_get_section_contents
3228 #define coff_small_get_section_contents_in_window \
3229 coff_get_section_contents_in_window
3230
3231 extern const bfd_target shlcoff_small_vec;
3232
3233 const bfd_target shcoff_small_vec =
3234 {
3235 "coff-sh-small", /* name */
3236 bfd_target_coff_flavour,
3237 BFD_ENDIAN_BIG, /* data byte order is big */
3238 BFD_ENDIAN_BIG, /* header byte order is big */
3239
3240 (HAS_RELOC | EXEC_P | /* object flags */
3241 HAS_LINENO | HAS_DEBUG |
3242 HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE),
3243
3244 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC),
3245 '_', /* leading symbol underscore */
3246 '/', /* ar_pad_char */
3247 15, /* ar_max_namelen */
3248 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
3249 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
3250 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
3251 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
3252 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
3253 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
3254
3255 {_bfd_dummy_target, coff_small_object_p, /* bfd_check_format */
3256 bfd_generic_archive_p, _bfd_dummy_target},
3257 {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
3258 bfd_false},
3259 {bfd_false, coff_write_object_contents, /* bfd_write_contents */
3260 _bfd_write_archive_contents, bfd_false},
3261
3262 BFD_JUMP_TABLE_GENERIC (coff_small),
3263 BFD_JUMP_TABLE_COPY (coff),
3264 BFD_JUMP_TABLE_CORE (_bfd_nocore),
3265 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
3266 BFD_JUMP_TABLE_SYMBOLS (coff),
3267 BFD_JUMP_TABLE_RELOCS (coff),
3268 BFD_JUMP_TABLE_WRITE (coff),
3269 BFD_JUMP_TABLE_LINK (coff),
3270 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
3271
3272 & shlcoff_small_vec,
3273
3274 (PTR) &bfd_coff_small_swap_table
3275 };
3276
3277 const bfd_target shlcoff_small_vec =
3278 {
3279 "coff-shl-small", /* name */
3280 bfd_target_coff_flavour,
3281 BFD_ENDIAN_LITTLE, /* data byte order is little */
3282 BFD_ENDIAN_LITTLE, /* header byte order is little endian too*/
3283
3284 (HAS_RELOC | EXEC_P | /* object flags */
3285 HAS_LINENO | HAS_DEBUG |
3286 HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE),
3287
3288 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC),
3289 '_', /* leading symbol underscore */
3290 '/', /* ar_pad_char */
3291 15, /* ar_max_namelen */
3292 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
3293 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
3294 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
3295 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
3296 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
3297 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
3298
3299 {_bfd_dummy_target, coff_small_object_p, /* bfd_check_format */
3300 bfd_generic_archive_p, _bfd_dummy_target},
3301 {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
3302 bfd_false},
3303 {bfd_false, coff_write_object_contents, /* bfd_write_contents */
3304 _bfd_write_archive_contents, bfd_false},
3305
3306 BFD_JUMP_TABLE_GENERIC (coff_small),
3307 BFD_JUMP_TABLE_COPY (coff),
3308 BFD_JUMP_TABLE_CORE (_bfd_nocore),
3309 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
3310 BFD_JUMP_TABLE_SYMBOLS (coff),
3311 BFD_JUMP_TABLE_RELOCS (coff),
3312 BFD_JUMP_TABLE_WRITE (coff),
3313 BFD_JUMP_TABLE_LINK (coff),
3314 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
3315
3316 & shcoff_small_vec,
3317
3318 (PTR) &bfd_coff_small_swap_table
3319 };
3320 #endif
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