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99c513f6 DD |
1 | /* tc-rl78.c -- Assembler for the Renesas RL78 |
2 | Copyright 2011 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA | |
20 | 02110-1301, USA. */ | |
21 | ||
22 | #include "as.h" | |
23 | #include "struc-symbol.h" | |
24 | #include "obstack.h" | |
25 | #include "safe-ctype.h" | |
26 | #include "dwarf2dbg.h" | |
27 | #include "libbfd.h" | |
28 | #include "elf/common.h" | |
29 | #include "elf/rl78.h" | |
30 | #include "rl78-defs.h" | |
31 | #include "filenames.h" | |
32 | #include "listing.h" | |
33 | #include "sb.h" | |
34 | #include "macro.h" | |
35 | ||
36 | const char comment_chars[] = ";"; | |
37 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
38 | first line of the input file. This is because the compiler outputs | |
39 | #NO_APP at the beginning of its output. */ | |
40 | const char line_comment_chars[] = "#"; | |
41 | const char line_separator_chars[] = "|"; | |
42 | ||
43 | const char EXP_CHARS[] = "eE"; | |
44 | const char FLT_CHARS[] = "dD"; | |
45 | ||
46 | /*------------------------------------------------------------------*/ | |
47 | ||
48 | char * rl78_lex_start; | |
49 | char * rl78_lex_end; | |
50 | ||
51 | typedef struct rl78_bytesT | |
52 | { | |
53 | char prefix[1]; | |
54 | int n_prefix; | |
55 | char base[4]; | |
56 | int n_base; | |
57 | char ops[8]; | |
58 | int n_ops; | |
59 | struct | |
60 | { | |
61 | expressionS exp; | |
62 | char offset; | |
63 | char nbits; | |
64 | char type; /* RL78REL_*. */ | |
65 | int reloc; | |
66 | fixS * fixP; | |
67 | } fixups[2]; | |
68 | int n_fixups; | |
69 | struct | |
70 | { | |
71 | char type; | |
72 | char field_pos; | |
73 | char val_ofs; | |
74 | } relax[2]; | |
75 | int n_relax; | |
76 | int link_relax; | |
77 | fixS *link_relax_fixP; | |
78 | char times_grown; | |
79 | char times_shrank; | |
80 | } rl78_bytesT; | |
81 | ||
82 | static rl78_bytesT rl78_bytes; | |
83 | ||
84 | static void | |
85 | rl78_fixup (expressionS exp, int offsetbits, int nbits, int type) | |
86 | { | |
87 | rl78_bytes.fixups[rl78_bytes.n_fixups].exp = exp; | |
88 | rl78_bytes.fixups[rl78_bytes.n_fixups].offset = offsetbits; | |
89 | rl78_bytes.fixups[rl78_bytes.n_fixups].nbits = nbits; | |
90 | rl78_bytes.fixups[rl78_bytes.n_fixups].type = type; | |
91 | rl78_bytes.fixups[rl78_bytes.n_fixups].reloc = exp.X_md; | |
92 | rl78_bytes.n_fixups ++; | |
93 | } | |
94 | ||
95 | #define rl78_field_fixup(exp, offset, nbits, type) \ | |
96 | rl78_fixup (exp, offset + 8 * rl78_bytes.n_prefix), nbits, type) | |
97 | ||
98 | #define rl78_op_fixup(exp, offset, nbits, type) \ | |
99 | rl78_fixup (exp, offset + 8 * (rl78_bytes.n_prefix + rl78_bytes.n_base), nbits, type) | |
100 | ||
101 | void | |
102 | rl78_prefix (int p) | |
103 | { | |
104 | rl78_bytes.prefix[0] = p; | |
105 | rl78_bytes.n_prefix = 1; | |
106 | } | |
107 | ||
108 | int | |
109 | rl78_has_prefix () | |
110 | { | |
111 | return rl78_bytes.n_prefix; | |
112 | } | |
113 | ||
114 | void | |
115 | rl78_base1 (int b1) | |
116 | { | |
117 | rl78_bytes.base[0] = b1; | |
118 | rl78_bytes.n_base = 1; | |
119 | } | |
120 | ||
121 | void | |
122 | rl78_base2 (int b1, int b2) | |
123 | { | |
124 | rl78_bytes.base[0] = b1; | |
125 | rl78_bytes.base[1] = b2; | |
126 | rl78_bytes.n_base = 2; | |
127 | } | |
128 | ||
129 | void | |
130 | rl78_base3 (int b1, int b2, int b3) | |
131 | { | |
132 | rl78_bytes.base[0] = b1; | |
133 | rl78_bytes.base[1] = b2; | |
134 | rl78_bytes.base[2] = b3; | |
135 | rl78_bytes.n_base = 3; | |
136 | } | |
137 | ||
138 | void | |
139 | rl78_base4 (int b1, int b2, int b3, int b4) | |
140 | { | |
141 | rl78_bytes.base[0] = b1; | |
142 | rl78_bytes.base[1] = b2; | |
143 | rl78_bytes.base[2] = b3; | |
144 | rl78_bytes.base[3] = b4; | |
145 | rl78_bytes.n_base = 4; | |
146 | } | |
147 | ||
148 | #define F_PRECISION 2 | |
149 | ||
150 | void | |
151 | rl78_op (expressionS exp, int nbytes, int type) | |
152 | { | |
153 | int v = 0; | |
154 | ||
155 | if ((exp.X_op == O_constant || exp.X_op == O_big) | |
156 | && type != RL78REL_PCREL) | |
157 | { | |
158 | if (exp.X_op == O_big && exp.X_add_number <= 0) | |
159 | { | |
160 | LITTLENUM_TYPE w[2]; | |
161 | char * ip = rl78_bytes.ops + rl78_bytes.n_ops; | |
162 | ||
163 | gen_to_words (w, F_PRECISION, 8); | |
164 | ip[3] = w[0] >> 8; | |
165 | ip[2] = w[0]; | |
166 | ip[1] = w[1] >> 8; | |
167 | ip[0] = w[1]; | |
168 | rl78_bytes.n_ops += 4; | |
169 | } | |
170 | else | |
171 | { | |
172 | v = exp.X_add_number; | |
173 | while (nbytes) | |
174 | { | |
175 | rl78_bytes.ops[rl78_bytes.n_ops++] =v & 0xff; | |
176 | v >>= 8; | |
177 | nbytes --; | |
178 | } | |
179 | } | |
180 | } | |
181 | else | |
182 | { | |
183 | rl78_op_fixup (exp, rl78_bytes.n_ops * 8, nbytes * 8, type); | |
184 | memset (rl78_bytes.ops + rl78_bytes.n_ops, 0, nbytes); | |
185 | rl78_bytes.n_ops += nbytes; | |
186 | } | |
187 | } | |
188 | ||
189 | /* This gets complicated when the field spans bytes, because fields | |
190 | are numbered from the MSB of the first byte as zero, and bits are | |
191 | stored LSB towards the LSB of the byte. Thus, a simple four-bit | |
192 | insertion of 12 at position 4 of 0x00 yields: 0x0b. A three-bit | |
193 | insertion of b'MXL at position 7 is like this: | |
194 | ||
195 | - - - - - - - - - - - - - - - - | |
196 | M X L */ | |
197 | ||
198 | void | |
199 | rl78_field (int val, int pos, int sz) | |
200 | { | |
201 | int valm; | |
202 | int bytep, bitp; | |
203 | ||
204 | if (sz > 0) | |
205 | { | |
206 | if (val < 0 || val >= (1 << sz)) | |
207 | as_bad (_("Value %d doesn't fit in unsigned %d-bit field"), val, sz); | |
208 | } | |
209 | else | |
210 | { | |
211 | sz = - sz; | |
212 | if (val < -(1 << (sz - 1)) || val >= (1 << (sz - 1))) | |
213 | as_bad (_("Value %d doesn't fit in signed %d-bit field"), val, sz); | |
214 | } | |
215 | ||
216 | /* This code points at 'M' in the above example. */ | |
217 | bytep = pos / 8; | |
218 | bitp = pos % 8; | |
219 | ||
220 | while (bitp + sz > 8) | |
221 | { | |
222 | int ssz = 8 - bitp; | |
223 | int svalm; | |
224 | ||
225 | svalm = val >> (sz - ssz); | |
226 | svalm = svalm & ((1 << ssz) - 1); | |
227 | svalm = svalm << (8 - bitp - ssz); | |
228 | gas_assert (bytep < rl78_bytes.n_base); | |
229 | rl78_bytes.base[bytep] |= svalm; | |
230 | ||
231 | bitp = 0; | |
232 | sz -= ssz; | |
233 | bytep ++; | |
234 | } | |
235 | valm = val & ((1 << sz) - 1); | |
236 | valm = valm << (8 - bitp - sz); | |
237 | gas_assert (bytep < rl78_bytes.n_base); | |
238 | rl78_bytes.base[bytep] |= valm; | |
239 | } | |
240 | ||
241 | /*------------------------------------------------------------------*/ | |
242 | ||
243 | #define RL78_SHORTOPTS "" | |
244 | const char * md_shortopts = RL78_SHORTOPTS; | |
245 | ||
246 | /* Assembler options. */ | |
247 | struct option md_longopts[] = | |
248 | { | |
249 | {NULL, no_argument, NULL, 0} | |
250 | }; | |
251 | size_t md_longopts_size = sizeof (md_longopts); | |
252 | ||
253 | int | |
254 | md_parse_option (int c ATTRIBUTE_UNUSED, char * arg ATTRIBUTE_UNUSED) | |
255 | { | |
256 | return 0; | |
257 | } | |
258 | ||
259 | void | |
260 | md_show_usage (FILE * stream ATTRIBUTE_UNUSED) | |
261 | { | |
262 | } | |
263 | ||
264 | ||
265 | static void | |
266 | s_bss (int ignore ATTRIBUTE_UNUSED) | |
267 | { | |
268 | int temp; | |
269 | ||
270 | temp = get_absolute_expression (); | |
271 | subseg_set (bss_section, (subsegT) temp); | |
272 | demand_empty_rest_of_line (); | |
273 | } | |
274 | ||
275 | /* The target specific pseudo-ops which we support. */ | |
276 | const pseudo_typeS md_pseudo_table[] = | |
277 | { | |
278 | /* Our "standard" pseudos. */ | |
279 | { "double", float_cons, 'd' }, | |
280 | { "bss", s_bss, 0 }, | |
281 | { "3byte", cons, 3 }, | |
282 | { "int", cons, 4 }, | |
283 | { "word", cons, 4 }, | |
284 | ||
285 | /* End of list marker. */ | |
286 | { NULL, NULL, 0 } | |
287 | }; | |
288 | ||
289 | void | |
290 | md_begin (void) | |
291 | { | |
292 | } | |
293 | ||
294 | void | |
295 | rl78_md_end (void) | |
296 | { | |
297 | } | |
298 | ||
299 | /* Write a value out to the object file, using the appropriate endianness. */ | |
300 | void | |
301 | md_number_to_chars (char * buf, valueT val, int n) | |
302 | { | |
303 | number_to_chars_littleendian (buf, val, n); | |
304 | } | |
305 | ||
306 | static struct | |
307 | { | |
308 | char * fname; | |
309 | int reloc; | |
310 | } | |
311 | reloc_functions[] = | |
312 | { | |
313 | { "lo16", BFD_RELOC_RL78_LO16 }, | |
314 | { "hi16", BFD_RELOC_RL78_HI16 }, | |
315 | { "hi8", BFD_RELOC_RL78_HI8 }, | |
316 | { 0, 0 } | |
317 | }; | |
318 | ||
319 | void | |
320 | md_operand (expressionS * exp ATTRIBUTE_UNUSED) | |
321 | { | |
322 | int reloc = 0; | |
323 | int i; | |
324 | ||
325 | for (i = 0; reloc_functions[i].fname; i++) | |
326 | { | |
327 | int flen = strlen (reloc_functions[i].fname); | |
328 | ||
329 | if (input_line_pointer[0] == '%' | |
330 | && strncasecmp (input_line_pointer + 1, reloc_functions[i].fname, flen) == 0 | |
331 | && input_line_pointer[flen + 1] == '(') | |
332 | { | |
333 | reloc = reloc_functions[i].reloc; | |
334 | input_line_pointer += flen + 2; | |
335 | break; | |
336 | } | |
337 | } | |
338 | if (reloc == 0) | |
339 | return; | |
340 | ||
341 | expression (exp); | |
342 | if (* input_line_pointer == ')') | |
343 | input_line_pointer ++; | |
344 | ||
345 | exp->X_md = reloc; | |
346 | } | |
347 | ||
348 | void | |
349 | rl78_frag_init (fragS * fragP) | |
350 | { | |
351 | fragP->tc_frag_data = 0; | |
352 | } | |
353 | ||
354 | char * | |
355 | md_atof (int type, char * litP, int * sizeP) | |
356 | { | |
357 | return ieee_md_atof (type, litP, sizeP, target_big_endian); | |
358 | } | |
359 | ||
360 | symbolS * | |
361 | md_undefined_symbol (char * name ATTRIBUTE_UNUSED) | |
362 | { | |
363 | return NULL; | |
364 | } | |
365 | ||
366 | #define APPEND(B, N_B) \ | |
367 | if (rl78_bytes.N_B) \ | |
368 | { \ | |
369 | memcpy (bytes + idx, rl78_bytes.B, rl78_bytes.N_B); \ | |
370 | idx += rl78_bytes.N_B; \ | |
371 | } | |
372 | ||
373 | ||
374 | void | |
375 | md_assemble (char * str) | |
376 | { | |
377 | char * bytes; | |
378 | fragS * frag_then = frag_now; | |
379 | int idx = 0; | |
380 | int i; | |
381 | int rel; | |
382 | expressionS *exp; | |
383 | ||
384 | /*printf("\033[32mASM: %s\033[0m\n", str);*/ | |
385 | ||
386 | dwarf2_emit_insn (0); | |
387 | ||
388 | memset (& rl78_bytes, 0, sizeof (rl78_bytes)); | |
389 | ||
390 | rl78_lex_init (str, str + strlen (str)); | |
391 | ||
392 | rl78_parse (); | |
393 | ||
394 | bytes = frag_more (rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops); | |
395 | frag_then = frag_now; | |
396 | ||
397 | APPEND (prefix, n_prefix); | |
398 | APPEND (base, n_base); | |
399 | APPEND (ops, n_ops); | |
400 | ||
401 | for (i = 0; i < rl78_bytes.n_fixups; i ++) | |
402 | { | |
403 | /* index: [nbytes][type] */ | |
404 | static int reloc_map[5][4] = | |
405 | { | |
406 | { 0, 0 }, | |
407 | { BFD_RELOC_8, BFD_RELOC_8_PCREL }, | |
408 | { BFD_RELOC_16, BFD_RELOC_16_PCREL }, | |
409 | { BFD_RELOC_24, BFD_RELOC_24_PCREL }, | |
410 | { BFD_RELOC_32, BFD_RELOC_32_PCREL }, | |
411 | }; | |
412 | fixS * f; | |
413 | ||
414 | idx = rl78_bytes.fixups[i].offset / 8; | |
415 | rel = reloc_map [rl78_bytes.fixups[i].nbits / 8][(int) rl78_bytes.fixups[i].type]; | |
416 | ||
417 | if (rl78_bytes.fixups[i].reloc) | |
418 | rel = rl78_bytes.fixups[i].reloc; | |
419 | ||
420 | if (frag_then->tc_frag_data) | |
421 | exp = & frag_then->tc_frag_data->fixups[i].exp; | |
422 | else | |
423 | exp = & rl78_bytes.fixups[i].exp; | |
424 | ||
425 | f = fix_new_exp (frag_then, | |
426 | (char *) bytes + idx - frag_then->fr_literal, | |
427 | rl78_bytes.fixups[i].nbits / 8, | |
428 | exp, | |
429 | rl78_bytes.fixups[i].type == RL78REL_PCREL ? 1 : 0, | |
430 | rel); | |
431 | if (frag_then->tc_frag_data) | |
432 | frag_then->tc_frag_data->fixups[i].fixP = f; | |
433 | } | |
434 | } | |
435 | ||
436 | void | |
437 | rl78_cons_fix_new (fragS * frag, | |
438 | int where, | |
439 | int size, | |
440 | expressionS * exp) | |
441 | { | |
442 | bfd_reloc_code_real_type type; | |
443 | ||
444 | switch (size) | |
445 | { | |
446 | case 1: | |
447 | type = BFD_RELOC_8; | |
448 | break; | |
449 | case 2: | |
450 | type = BFD_RELOC_16; | |
451 | break; | |
452 | case 3: | |
453 | type = BFD_RELOC_24; | |
454 | break; | |
455 | case 4: | |
456 | type = BFD_RELOC_32; | |
457 | break; | |
458 | default: | |
459 | as_bad (_("unsupported constant size %d\n"), size); | |
460 | return; | |
461 | } | |
462 | ||
463 | if (exp->X_op == O_subtract && exp->X_op_symbol) | |
464 | { | |
465 | if (size != 4 && size != 2 && size != 1) | |
466 | as_bad (_("difference of two symbols only supported with .long, .short, or .byte")); | |
467 | else | |
468 | type = BFD_RELOC_RL78_DIFF; | |
469 | } | |
470 | ||
471 | fix_new_exp (frag, where, (int) size, exp, 0, type); | |
472 | } | |
473 | ||
474 | /* No relaxation just yet */ | |
475 | int | |
476 | md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED, segT segment ATTRIBUTE_UNUSED) | |
477 | { | |
478 | return 0; | |
479 | } | |
480 | arelent ** | |
481 | tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp) | |
482 | { | |
483 | static arelent * reloc[8]; | |
484 | int rp; | |
99c513f6 DD |
485 | |
486 | if (fixp->fx_r_type == BFD_RELOC_NONE) | |
487 | { | |
488 | reloc[0] = NULL; | |
489 | return reloc; | |
490 | } | |
491 | ||
492 | if (fixp->fx_subsy | |
493 | && S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
494 | { | |
495 | fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy); | |
496 | fixp->fx_subsy = NULL; | |
497 | } | |
498 | ||
499 | reloc[0] = (arelent *) xmalloc (sizeof (arelent)); | |
500 | reloc[0]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
501 | * reloc[0]->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
502 | reloc[0]->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
503 | reloc[0]->addend = fixp->fx_offset; | |
504 | ||
505 | if (fixp->fx_r_type == BFD_RELOC_RL78_32_OP | |
506 | && fixp->fx_subsy) | |
507 | { | |
508 | fixp->fx_r_type = BFD_RELOC_RL78_DIFF; | |
99c513f6 DD |
509 | } |
510 | ||
511 | #define OPX(REL,SYM,ADD) \ | |
512 | reloc[rp] = (arelent *) xmalloc (sizeof (arelent)); \ | |
513 | reloc[rp]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); \ | |
514 | reloc[rp]->howto = bfd_reloc_type_lookup (stdoutput, REL); \ | |
515 | reloc[rp]->addend = ADD; \ | |
516 | * reloc[rp]->sym_ptr_ptr = SYM; \ | |
517 | reloc[rp]->address = fixp->fx_frag->fr_address + fixp->fx_where; \ | |
518 | reloc[++rp] = NULL | |
519 | #define OPSYM(SYM) OPX(BFD_RELOC_RL78_SYM, SYM, 0) | |
520 | #define OPIMM(IMM) OPX(BFD_RELOC_RL78_SYM, abs_symbol.bsym, IMM) | |
521 | #define OP(OP) OPX(BFD_RELOC_RL78_##OP, *reloc[0]->sym_ptr_ptr, 0) | |
522 | #define SYM0() reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_SYM) | |
523 | ||
524 | rp = 1; | |
525 | ||
526 | /* Certain BFD relocations cannot be translated directly into | |
527 | a single (non-Red Hat) RL78 relocation, but instead need | |
528 | multiple RL78 relocations - handle them here. */ | |
529 | switch (fixp->fx_r_type) | |
530 | { | |
531 | case BFD_RELOC_RL78_DIFF: | |
532 | SYM0 (); | |
533 | OPSYM (symbol_get_bfdsym (fixp->fx_subsy)); | |
534 | OP(OP_SUBTRACT); | |
535 | ||
536 | switch (fixp->fx_size) | |
537 | { | |
538 | case 1: | |
539 | OP(ABS8); | |
540 | break; | |
541 | case 2: | |
542 | OP (ABS16); | |
543 | break; | |
544 | case 4: | |
545 | OP (ABS32); | |
546 | break; | |
547 | } | |
548 | break; | |
549 | ||
550 | case BFD_RELOC_RL78_NEG32: | |
551 | SYM0 (); | |
552 | OP (OP_NEG); | |
553 | OP (ABS32); | |
554 | break; | |
555 | ||
556 | case BFD_RELOC_RL78_LO16: | |
557 | SYM0 (); | |
558 | OPIMM (0xffff); | |
559 | OP (OP_AND); | |
560 | OP (ABS16); | |
561 | break; | |
562 | ||
563 | case BFD_RELOC_RL78_HI16: | |
564 | SYM0 (); | |
565 | OPIMM (16); | |
566 | OP (OP_SHRA); | |
567 | OP (ABS16); | |
568 | break; | |
569 | ||
570 | case BFD_RELOC_RL78_HI8: | |
571 | SYM0 (); | |
572 | OPIMM (16); | |
573 | OP (OP_SHRA); | |
574 | OPIMM (0xff); | |
575 | OP (OP_AND); | |
576 | OP (ABS8); | |
577 | break; | |
578 | ||
579 | default: | |
580 | reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
581 | reloc[1] = NULL; | |
582 | break; | |
583 | } | |
584 | ||
585 | return reloc; | |
586 | } | |
587 | ||
588 | int | |
589 | rl78_validate_fix_sub (struct fix * f) | |
590 | { | |
591 | /* We permit the subtraction of two symbols in a few cases. */ | |
592 | /* mov #sym1-sym2, R3 */ | |
593 | if (f->fx_r_type == BFD_RELOC_RL78_32_OP) | |
594 | return 1; | |
595 | /* .long sym1-sym2 */ | |
596 | if (f->fx_r_type == BFD_RELOC_RL78_DIFF | |
597 | && ! f->fx_pcrel | |
598 | && (f->fx_size == 4 || f->fx_size == 2 || f->fx_size == 1)) | |
599 | return 1; | |
600 | return 0; | |
601 | } | |
602 | ||
603 | long | |
604 | md_pcrel_from_section (fixS * fixP, segT sec) | |
605 | { | |
606 | long rv; | |
607 | ||
608 | if (fixP->fx_addsy != NULL | |
609 | && (! S_IS_DEFINED (fixP->fx_addsy) | |
610 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) | |
611 | /* The symbol is undefined (or is defined but not in this section). | |
612 | Let the linker figure it out. */ | |
613 | return 0; | |
614 | ||
615 | rv = fixP->fx_frag->fr_address + fixP->fx_where; | |
616 | switch (fixP->fx_r_type) | |
617 | { | |
618 | case BFD_RELOC_8_PCREL: | |
619 | rv += 1; | |
620 | break; | |
621 | case BFD_RELOC_16_PCREL: | |
622 | rv += 2; | |
623 | break; | |
624 | default: | |
625 | break; | |
626 | } | |
627 | return rv; | |
628 | } | |
629 | ||
630 | void | |
631 | md_apply_fix (struct fix * f ATTRIBUTE_UNUSED, | |
632 | valueT * t ATTRIBUTE_UNUSED, | |
633 | segT s ATTRIBUTE_UNUSED) | |
634 | { | |
635 | char * op; | |
636 | unsigned long val; | |
637 | ||
638 | if (f->fx_addsy && S_FORCE_RELOC (f->fx_addsy, 1)) | |
639 | return; | |
640 | if (f->fx_subsy && S_FORCE_RELOC (f->fx_subsy, 1)) | |
641 | return; | |
642 | ||
643 | op = f->fx_frag->fr_literal + f->fx_where; | |
644 | val = (unsigned long) * t; | |
645 | ||
646 | switch (f->fx_r_type) | |
647 | { | |
648 | case BFD_RELOC_NONE: | |
649 | break; | |
650 | ||
651 | case BFD_RELOC_8: | |
652 | case BFD_RELOC_8_PCREL: | |
653 | op[0] = val; | |
654 | break; | |
655 | ||
656 | case BFD_RELOC_16: | |
657 | case BFD_RELOC_16_PCREL: | |
658 | op[0] = val; | |
659 | op[1] = val >> 8; | |
660 | break; | |
661 | ||
662 | case BFD_RELOC_24: | |
663 | op[0] = val; | |
664 | op[1] = val >> 8; | |
665 | op[2] = val >> 16; | |
666 | break; | |
667 | ||
668 | case BFD_RELOC_32: | |
669 | case BFD_RELOC_RL78_DIFF: | |
670 | op[0] = val; | |
671 | op[1] = val >> 8; | |
672 | op[2] = val >> 16; | |
673 | op[3] = val >> 24; | |
674 | break; | |
675 | ||
676 | default: | |
677 | as_bad (_("Unknown reloc in md_apply_fix: %s"), | |
678 | bfd_get_reloc_code_name (f->fx_r_type)); | |
679 | break; | |
680 | } | |
681 | ||
682 | if (f->fx_addsy == NULL) | |
683 | f->fx_done = 1; | |
684 | } | |
685 | ||
686 | valueT | |
687 | md_section_align (segT segment, valueT size) | |
688 | { | |
689 | int align = bfd_get_section_alignment (stdoutput, segment); | |
690 | return ((size + (1 << align) - 1) & (-1 << align)); | |
691 | } | |
692 | ||
693 | void | |
694 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, | |
695 | segT segment ATTRIBUTE_UNUSED, | |
696 | fragS * fragP ATTRIBUTE_UNUSED) | |
697 | { | |
698 | /* No relaxation yet */ | |
699 | } |