Commit | Line | Data |
---|---|---|
20135e4c NC |
1 | /* tc-moxie.c -- Assemble code for moxie |
2 | Copyright 2009 | |
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 | |
19 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, | |
20 | Boston, MA 02110-1301, USA. */ | |
21 | ||
22 | /* Contributed by Anthony Green <green@moxielogic.com>. */ | |
23 | ||
24 | #include "as.h" | |
25 | #include "safe-ctype.h" | |
26 | #include "opcode/moxie.h" | |
27 | #include "elf/moxie.h" | |
28 | ||
29 | extern const moxie_opc_info_t moxie_opc_info[128]; | |
30 | ||
31 | const char comment_chars[] = "#"; | |
32 | const char line_separator_chars[] = ";"; | |
33 | const char line_comment_chars[] = "#"; | |
34 | ||
35 | static int pending_reloc; | |
36 | static struct hash_control *opcode_hash_control; | |
37 | ||
38 | const pseudo_typeS md_pseudo_table[] = | |
39 | { | |
40 | {0, 0, 0} | |
41 | }; | |
42 | ||
43 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
44 | const char EXP_CHARS[] = "eE"; | |
45 | ||
f865a31d AG |
46 | static int md_chars_to_number (char *val, int n); |
47 | ||
20135e4c NC |
48 | void |
49 | md_operand (expressionS *op __attribute__((unused))) | |
50 | { | |
51 | /* Empty for now. */ | |
52 | } | |
53 | ||
54 | /* This function is called once, at assembler startup time. It sets | |
55 | up the hash table with all the opcodes in it, and also initializes | |
56 | some aliases for compatibility with other assemblers. */ | |
57 | ||
58 | void | |
59 | md_begin (void) | |
60 | { | |
61 | int count; | |
62 | const moxie_opc_info_t *opcode; | |
63 | opcode_hash_control = hash_new (); | |
64 | ||
65 | /* Insert names into hash table. */ | |
66 | for (count = 0, opcode = moxie_form1_opc_info; count++ < 64; opcode++) | |
67 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); | |
68 | ||
69 | for (count = 0, opcode = moxie_form2_opc_info; count++ < 4; opcode++) | |
70 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); | |
71 | ||
f865a31d | 72 | for (count = 0, opcode = moxie_form3_opc_info; count++ < 10; opcode++) |
20135e4c NC |
73 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); |
74 | ||
75 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, 0); | |
76 | } | |
77 | ||
78 | /* Parse an expression and then restore the input line pointer. */ | |
79 | ||
80 | static char * | |
81 | parse_exp_save_ilp (char *s, expressionS *op) | |
82 | { | |
83 | char *save = input_line_pointer; | |
84 | ||
85 | input_line_pointer = s; | |
86 | expression (op); | |
87 | s = input_line_pointer; | |
88 | input_line_pointer = save; | |
89 | return s; | |
90 | } | |
91 | ||
92 | static int | |
93 | parse_register_operand (char **ptr) | |
94 | { | |
95 | int reg; | |
96 | char *s = *ptr; | |
97 | ||
98 | if (*s != '$') | |
99 | { | |
20203fb9 | 100 | as_bad (_("expecting register")); |
20135e4c NC |
101 | ignore_rest_of_line (); |
102 | return -1; | |
103 | } | |
104 | if (s[1] == 'f' && s[2] == 'p') | |
105 | { | |
106 | *ptr += 3; | |
107 | return 0; | |
108 | } | |
109 | if (s[1] == 's' && s[2] == 'p') | |
110 | { | |
111 | *ptr += 3; | |
112 | return 1; | |
113 | } | |
114 | if (s[1] == 'r') | |
115 | { | |
116 | reg = s[2] - '0'; | |
117 | if ((reg < 0) || (reg > 9)) | |
118 | { | |
20203fb9 | 119 | as_bad (_("illegal register number")); |
20135e4c NC |
120 | ignore_rest_of_line (); |
121 | return -1; | |
122 | } | |
123 | if (reg == 1) | |
124 | { | |
125 | int r2 = s[3] - '0'; | |
126 | if ((r2 >= 0) && (r2 <= 3)) | |
127 | { | |
128 | reg = 10 + r2; | |
129 | *ptr += 1; | |
130 | } | |
131 | } | |
132 | } | |
133 | else | |
134 | { | |
20203fb9 | 135 | as_bad (_("illegal register number")); |
20135e4c NC |
136 | ignore_rest_of_line (); |
137 | return -1; | |
138 | } | |
139 | ||
140 | *ptr += 3; | |
141 | ||
142 | return reg + 2; | |
143 | } | |
144 | ||
145 | /* This is the guts of the machine-dependent assembler. STR points to | |
146 | a machine dependent instruction. This function is supposed to emit | |
147 | the frags/bytes it assembles to. */ | |
148 | ||
149 | void | |
150 | md_assemble (char *str) | |
151 | { | |
152 | char *op_start; | |
153 | char *op_end; | |
154 | ||
155 | moxie_opc_info_t *opcode; | |
156 | char *p; | |
157 | char pend; | |
158 | ||
159 | unsigned short iword = 0; | |
160 | ||
161 | int nlen = 0; | |
162 | ||
163 | /* Drop leading whitespace. */ | |
164 | while (*str == ' ') | |
165 | str++; | |
166 | ||
167 | /* Find the op code end. */ | |
168 | op_start = str; | |
169 | for (op_end = str; | |
170 | *op_end && !is_end_of_line[*op_end & 0xff] && *op_end != ' '; | |
171 | op_end++) | |
172 | nlen++; | |
173 | ||
174 | pend = *op_end; | |
175 | *op_end = 0; | |
176 | ||
177 | if (nlen == 0) | |
178 | as_bad (_("can't find opcode ")); | |
179 | opcode = (moxie_opc_info_t *) hash_find (opcode_hash_control, op_start); | |
180 | *op_end = pend; | |
181 | ||
182 | if (opcode == NULL) | |
183 | { | |
184 | as_bad (_("unknown opcode %s"), op_start); | |
185 | return; | |
186 | } | |
187 | ||
188 | p = frag_more (2); | |
189 | ||
190 | switch (opcode->itype) | |
191 | { | |
192 | case MOXIE_F2_A8V: | |
193 | iword = (1<<15) | (opcode->opcode << 12); | |
194 | while (ISSPACE (*op_end)) | |
195 | op_end++; | |
196 | { | |
197 | expressionS arg; | |
198 | int reg; | |
199 | reg = parse_register_operand (&op_end); | |
200 | iword += (reg << 8); | |
201 | if (*op_end != ',') | |
2cbd2211 | 202 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
203 | op_end++; |
204 | op_end = parse_exp_save_ilp (op_end, &arg); | |
205 | fix_new_exp (frag_now, | |
206 | ((p+1) - frag_now->fr_literal), | |
207 | 1, | |
208 | &arg, | |
209 | 0, | |
210 | BFD_RELOC_8); | |
211 | } | |
212 | break; | |
213 | case MOXIE_F1_AB: | |
214 | iword = opcode->opcode << 8; | |
215 | while (ISSPACE (*op_end)) | |
216 | op_end++; | |
217 | { | |
218 | int dest, src; | |
219 | dest = parse_register_operand (&op_end); | |
220 | if (*op_end != ',') | |
2cbd2211 | 221 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
222 | op_end++; |
223 | src = parse_register_operand (&op_end); | |
224 | iword += (dest << 4) + src; | |
225 | while (ISSPACE (*op_end)) | |
226 | op_end++; | |
227 | if (*op_end != 0) | |
20203fb9 | 228 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
229 | } |
230 | break; | |
231 | case MOXIE_F1_A4: | |
232 | iword = opcode->opcode << 8; | |
233 | while (ISSPACE (*op_end)) | |
234 | op_end++; | |
235 | { | |
236 | expressionS arg; | |
237 | char *where; | |
238 | int regnum; | |
239 | ||
240 | regnum = parse_register_operand (&op_end); | |
241 | while (ISSPACE (*op_end)) | |
242 | op_end++; | |
243 | ||
244 | iword += (regnum << 4); | |
245 | ||
246 | if (*op_end != ',') | |
247 | { | |
20203fb9 | 248 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
249 | ignore_rest_of_line (); |
250 | return; | |
251 | } | |
252 | op_end++; | |
253 | ||
254 | op_end = parse_exp_save_ilp (op_end, &arg); | |
255 | where = frag_more (4); | |
256 | fix_new_exp (frag_now, | |
257 | (where - frag_now->fr_literal), | |
258 | 4, | |
259 | &arg, | |
260 | 0, | |
261 | BFD_RELOC_32); | |
262 | } | |
263 | break; | |
d7a5ed35 | 264 | case MOXIE_F1_M: |
20135e4c NC |
265 | case MOXIE_F1_4: |
266 | iword = opcode->opcode << 8; | |
267 | while (ISSPACE (*op_end)) | |
268 | op_end++; | |
269 | { | |
270 | expressionS arg; | |
271 | char *where; | |
272 | ||
273 | op_end = parse_exp_save_ilp (op_end, &arg); | |
274 | where = frag_more (4); | |
275 | fix_new_exp (frag_now, | |
276 | (where - frag_now->fr_literal), | |
277 | 4, | |
278 | &arg, | |
279 | 0, | |
280 | BFD_RELOC_32); | |
281 | } | |
282 | break; | |
283 | case MOXIE_F1_NARG: | |
284 | iword = opcode->opcode << 8; | |
285 | while (ISSPACE (*op_end)) | |
286 | op_end++; | |
287 | if (*op_end != 0) | |
20203fb9 | 288 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
289 | break; |
290 | case MOXIE_F1_A: | |
291 | iword = opcode->opcode << 8; | |
292 | while (ISSPACE (*op_end)) | |
293 | op_end++; | |
294 | { | |
295 | int reg; | |
296 | reg = parse_register_operand (&op_end); | |
297 | while (ISSPACE (*op_end)) | |
298 | op_end++; | |
299 | if (*op_end != 0) | |
20203fb9 | 300 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
301 | iword += (reg << 4); |
302 | } | |
303 | break; | |
304 | case MOXIE_F1_ABi: | |
305 | iword = opcode->opcode << 8; | |
306 | while (ISSPACE (*op_end)) | |
307 | op_end++; | |
308 | { | |
309 | int a, b; | |
310 | a = parse_register_operand (&op_end); | |
311 | if (*op_end != ',') | |
2cbd2211 | 312 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
313 | op_end++; |
314 | if (*op_end != '(') | |
315 | { | |
20203fb9 | 316 | as_bad (_("expecting indirect register `($rA)'")); |
20135e4c NC |
317 | ignore_rest_of_line (); |
318 | return; | |
319 | } | |
320 | op_end++; | |
321 | b = parse_register_operand (&op_end); | |
322 | if (*op_end != ')') | |
323 | { | |
20203fb9 | 324 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
325 | ignore_rest_of_line (); |
326 | return; | |
327 | } | |
328 | op_end++; | |
329 | iword += (a << 4) + b; | |
330 | while (ISSPACE (*op_end)) | |
331 | op_end++; | |
332 | if (*op_end != 0) | |
20203fb9 | 333 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
334 | } |
335 | break; | |
336 | case MOXIE_F1_AiB: | |
337 | iword = opcode->opcode << 8; | |
338 | while (ISSPACE (*op_end)) | |
339 | op_end++; | |
340 | { | |
341 | int a, b; | |
342 | if (*op_end != '(') | |
343 | { | |
20203fb9 | 344 | as_bad (_("expecting indirect register `($rA)'")); |
20135e4c NC |
345 | ignore_rest_of_line (); |
346 | return; | |
347 | } | |
348 | op_end++; | |
349 | a = parse_register_operand (&op_end); | |
350 | if (*op_end != ')') | |
351 | { | |
20203fb9 | 352 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
353 | ignore_rest_of_line (); |
354 | return; | |
355 | } | |
356 | op_end++; | |
357 | if (*op_end != ',') | |
2cbd2211 | 358 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
359 | op_end++; |
360 | b = parse_register_operand (&op_end); | |
361 | iword += (a << 4) + b; | |
362 | while (ISSPACE (*op_end)) | |
363 | op_end++; | |
364 | if (*op_end != 0) | |
20203fb9 | 365 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
366 | } |
367 | break; | |
368 | case MOXIE_F1_4A: | |
369 | iword = opcode->opcode << 8; | |
370 | while (ISSPACE (*op_end)) | |
371 | op_end++; | |
372 | { | |
373 | expressionS arg; | |
374 | char *where; | |
375 | int a; | |
376 | ||
377 | op_end = parse_exp_save_ilp (op_end, &arg); | |
378 | where = frag_more (4); | |
379 | fix_new_exp (frag_now, | |
380 | (where - frag_now->fr_literal), | |
381 | 4, | |
382 | &arg, | |
383 | 0, | |
384 | BFD_RELOC_32); | |
385 | ||
386 | if (*op_end != ',') | |
387 | { | |
20203fb9 | 388 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
389 | ignore_rest_of_line (); |
390 | return; | |
391 | } | |
392 | op_end++; | |
393 | ||
394 | a = parse_register_operand (&op_end); | |
395 | while (ISSPACE (*op_end)) | |
396 | op_end++; | |
397 | if (*op_end != 0) | |
20203fb9 | 398 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
399 | |
400 | iword += (a << 4); | |
401 | } | |
402 | break; | |
403 | case MOXIE_F1_ABi4: | |
404 | iword = opcode->opcode << 8; | |
405 | while (ISSPACE (*op_end)) | |
406 | op_end++; | |
407 | { | |
408 | expressionS arg; | |
409 | char *offset; | |
410 | int a, b; | |
411 | ||
412 | a = parse_register_operand (&op_end); | |
413 | while (ISSPACE (*op_end)) | |
414 | op_end++; | |
415 | ||
416 | if (*op_end != ',') | |
417 | { | |
20203fb9 | 418 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
419 | ignore_rest_of_line (); |
420 | return; | |
421 | } | |
422 | op_end++; | |
423 | ||
424 | op_end = parse_exp_save_ilp (op_end, &arg); | |
425 | offset = frag_more (4); | |
426 | fix_new_exp (frag_now, | |
427 | (offset - frag_now->fr_literal), | |
428 | 4, | |
429 | &arg, | |
430 | 0, | |
431 | BFD_RELOC_32); | |
432 | ||
433 | if (*op_end != '(') | |
434 | { | |
20203fb9 | 435 | as_bad (_("expecting indirect register `($rX)'")); |
20135e4c NC |
436 | ignore_rest_of_line (); |
437 | return; | |
438 | } | |
439 | op_end++; | |
440 | b = parse_register_operand (&op_end); | |
441 | if (*op_end != ')') | |
442 | { | |
20203fb9 | 443 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
444 | ignore_rest_of_line (); |
445 | return; | |
446 | } | |
447 | op_end++; | |
448 | ||
449 | while (ISSPACE (*op_end)) | |
450 | op_end++; | |
451 | if (*op_end != 0) | |
20203fb9 | 452 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
453 | |
454 | iword += (a << 4) + b; | |
455 | } | |
456 | break; | |
457 | case MOXIE_F1_AiB4: | |
458 | iword = opcode->opcode << 8; | |
459 | while (ISSPACE (*op_end)) | |
460 | op_end++; | |
461 | { | |
462 | expressionS arg; | |
463 | char *offset; | |
464 | int a, b; | |
465 | ||
466 | op_end = parse_exp_save_ilp (op_end, &arg); | |
467 | offset = frag_more (4); | |
468 | fix_new_exp (frag_now, | |
469 | (offset - frag_now->fr_literal), | |
470 | 4, | |
471 | &arg, | |
472 | 0, | |
473 | BFD_RELOC_32); | |
474 | ||
475 | if (*op_end != '(') | |
476 | { | |
20203fb9 | 477 | as_bad (_("expecting indirect register `($rX)'")); |
20135e4c NC |
478 | ignore_rest_of_line (); |
479 | return; | |
480 | } | |
481 | op_end++; | |
482 | a = parse_register_operand (&op_end); | |
483 | if (*op_end != ')') | |
484 | { | |
20203fb9 | 485 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
486 | ignore_rest_of_line (); |
487 | return; | |
488 | } | |
489 | op_end++; | |
490 | ||
491 | if (*op_end != ',') | |
492 | { | |
20203fb9 | 493 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
494 | ignore_rest_of_line (); |
495 | return; | |
496 | } | |
497 | op_end++; | |
498 | ||
499 | b = parse_register_operand (&op_end); | |
500 | while (ISSPACE (*op_end)) | |
501 | op_end++; | |
502 | ||
503 | while (ISSPACE (*op_end)) | |
504 | op_end++; | |
505 | if (*op_end != 0) | |
20203fb9 | 506 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
507 | |
508 | iword += (a << 4) + b; | |
509 | } | |
510 | break; | |
511 | case MOXIE_F2_NARG: | |
512 | iword = opcode->opcode << 12; | |
513 | while (ISSPACE (*op_end)) | |
514 | op_end++; | |
515 | if (*op_end != 0) | |
20203fb9 | 516 | as_warn (_("extra stuff on line ignored")); |
20135e4c | 517 | break; |
f865a31d AG |
518 | case MOXIE_F3_PCREL: |
519 | iword = (3<<14) | (opcode->opcode << 10); | |
520 | while (ISSPACE (*op_end)) | |
521 | op_end++; | |
522 | { | |
523 | expressionS arg; | |
524 | ||
525 | op_end = parse_exp_save_ilp (op_end, &arg); | |
526 | fix_new_exp (frag_now, | |
527 | (p - frag_now->fr_literal), | |
528 | 2, | |
529 | &arg, | |
530 | TRUE, | |
531 | BFD_RELOC_MOXIE_10_PCREL); | |
532 | } | |
533 | break; | |
20135e4c | 534 | default: |
20203fb9 | 535 | abort (); |
20135e4c NC |
536 | } |
537 | ||
538 | md_number_to_chars (p, iword, 2); | |
539 | ||
540 | while (ISSPACE (*op_end)) | |
541 | op_end++; | |
542 | ||
543 | if (*op_end != 0) | |
20203fb9 | 544 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
545 | |
546 | if (pending_reloc) | |
20203fb9 | 547 | as_bad (_("Something forgot to clean up\n")); |
20135e4c NC |
548 | } |
549 | ||
550 | /* Turn a string in input_line_pointer into a floating point constant | |
551 | of type type, and store the appropriate bytes in *LITP. The number | |
552 | of LITTLENUMS emitted is stored in *SIZEP . An error message is | |
553 | returned, or NULL on OK. */ | |
554 | ||
555 | char * | |
556 | md_atof (int type, char *litP, int *sizeP) | |
557 | { | |
558 | int prec; | |
559 | LITTLENUM_TYPE words[4]; | |
560 | char *t; | |
561 | int i; | |
562 | ||
563 | switch (type) | |
564 | { | |
565 | case 'f': | |
566 | prec = 2; | |
567 | break; | |
568 | ||
569 | case 'd': | |
570 | prec = 4; | |
571 | break; | |
572 | ||
573 | default: | |
574 | *sizeP = 0; | |
575 | return _("bad call to md_atof"); | |
576 | } | |
577 | ||
578 | t = atof_ieee (input_line_pointer, type, words); | |
579 | if (t) | |
580 | input_line_pointer = t; | |
581 | ||
582 | *sizeP = prec * 2; | |
583 | ||
584 | for (i = prec - 1; i >= 0; i--) | |
585 | { | |
586 | md_number_to_chars (litP, (valueT) words[i], 2); | |
587 | litP += 2; | |
588 | } | |
589 | ||
590 | return NULL; | |
591 | } | |
592 | \f | |
593 | const char *md_shortopts = ""; | |
594 | ||
595 | struct option md_longopts[] = | |
596 | { | |
597 | {NULL, no_argument, NULL, 0} | |
598 | }; | |
599 | size_t md_longopts_size = sizeof (md_longopts); | |
600 | ||
601 | /* We have no target specific options yet, so these next | |
602 | two functions are empty. */ | |
603 | int | |
604 | md_parse_option (int c ATTRIBUTE_UNUSED, char *arg ATTRIBUTE_UNUSED) | |
605 | { | |
606 | return 0; | |
607 | } | |
608 | ||
609 | void | |
610 | md_show_usage (FILE *stream ATTRIBUTE_UNUSED) | |
611 | { | |
612 | } | |
613 | ||
614 | /* Apply a fixup to the object file. */ | |
615 | ||
616 | void | |
f865a31d AG |
617 | md_apply_fix (fixS *fixP ATTRIBUTE_UNUSED, |
618 | valueT * valP ATTRIBUTE_UNUSED, segT seg ATTRIBUTE_UNUSED) | |
20135e4c NC |
619 | { |
620 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
621 | long val = *valP; | |
f865a31d | 622 | long newval; |
20135e4c NC |
623 | long max, min; |
624 | int shift; | |
625 | ||
626 | max = min = 0; | |
627 | shift = 0; | |
628 | switch (fixP->fx_r_type) | |
629 | { | |
630 | case BFD_RELOC_32: | |
631 | *buf++ = val >> 24; | |
632 | *buf++ = val >> 16; | |
633 | *buf++ = val >> 8; | |
634 | *buf++ = val >> 0; | |
635 | break; | |
636 | ||
637 | case BFD_RELOC_16: | |
638 | *buf++ = val >> 8; | |
639 | *buf++ = val >> 0; | |
640 | break; | |
641 | ||
642 | case BFD_RELOC_8: | |
643 | *buf++ = val; | |
644 | break; | |
645 | ||
f865a31d AG |
646 | case BFD_RELOC_MOXIE_10_PCREL: |
647 | if (!val) | |
648 | break; | |
649 | if (val < -1024 || val > 1022) | |
650 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
651 | _("pcrel too far BFD_RELOC_MOXIE_10")); | |
652 | /* 11 bit offset even numbered, so we remove right bit. */ | |
653 | val >>= 1; | |
654 | newval = md_chars_to_number (buf, 2); | |
655 | newval |= val & 0x03ff; | |
656 | md_number_to_chars (buf, newval, 2); | |
657 | break; | |
658 | ||
20135e4c NC |
659 | default: |
660 | abort (); | |
661 | } | |
662 | ||
663 | if (max != 0 && (val < min || val > max)) | |
664 | as_bad_where (fixP->fx_file, fixP->fx_line, _("offset out of range")); | |
665 | ||
666 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) | |
667 | fixP->fx_done = 1; | |
668 | } | |
669 | ||
670 | /* Put number into target byte order (big endian). */ | |
671 | ||
672 | void | |
673 | md_number_to_chars (char *ptr, valueT use, int nbytes) | |
674 | { | |
675 | number_to_chars_bigendian (ptr, use, nbytes); | |
676 | } | |
677 | ||
f865a31d AG |
678 | /* Convert from target byte order to host byte order. */ |
679 | ||
680 | static int | |
681 | md_chars_to_number (char *val, int n) | |
682 | { | |
683 | int retval = 0; | |
684 | ||
685 | while (n--) | |
686 | { | |
687 | retval <<= 8; | |
688 | retval |= (*val++ & 255); | |
689 | } | |
690 | ||
691 | return retval; | |
692 | } | |
693 | ||
20135e4c NC |
694 | /* Generate a machine-dependent relocation. */ |
695 | arelent * | |
696 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixP) | |
697 | { | |
698 | arelent *relP; | |
699 | bfd_reloc_code_real_type code; | |
700 | ||
701 | switch (fixP->fx_r_type) | |
702 | { | |
703 | case BFD_RELOC_32: | |
704 | code = fixP->fx_r_type; | |
705 | break; | |
f865a31d AG |
706 | case BFD_RELOC_MOXIE_10_PCREL: |
707 | code = fixP->fx_r_type; | |
708 | break; | |
20135e4c NC |
709 | default: |
710 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
711 | _("Semantics error. This type of operand can not be relocated, it must be an assembly-time constant")); | |
712 | return 0; | |
713 | } | |
714 | ||
715 | relP = xmalloc (sizeof (arelent)); | |
9c2799c2 | 716 | gas_assert (relP != 0); |
20135e4c NC |
717 | relP->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
718 | *relP->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); | |
719 | relP->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
720 | ||
721 | relP->addend = fixP->fx_offset; | |
722 | ||
723 | /* This is the standard place for KLUDGEs to work around bugs in | |
724 | bfd_install_relocation (first such note in the documentation | |
725 | appears with binutils-2.8). | |
726 | ||
727 | That function bfd_install_relocation does the wrong thing with | |
728 | putting stuff into the addend of a reloc (it should stay out) for a | |
729 | weak symbol. The really bad thing is that it adds the | |
730 | "segment-relative offset" of the symbol into the reloc. In this | |
731 | case, the reloc should instead be relative to the symbol with no | |
732 | other offset than the assembly code shows; and since the symbol is | |
733 | weak, any local definition should be ignored until link time (or | |
734 | thereafter). | |
735 | To wit: weaksym+42 should be weaksym+42 in the reloc, | |
736 | not weaksym+(offset_from_segment_of_local_weaksym_definition) | |
737 | ||
738 | To "work around" this, we subtract the segment-relative offset of | |
739 | "known" weak symbols. This evens out the extra offset. | |
740 | ||
741 | That happens for a.out but not for ELF, since for ELF, | |
742 | bfd_install_relocation uses the "special function" field of the | |
743 | howto, and does not execute the code that needs to be undone. */ | |
744 | ||
745 | if (OUTPUT_FLAVOR == bfd_target_aout_flavour | |
746 | && fixP->fx_addsy && S_IS_WEAK (fixP->fx_addsy) | |
747 | && ! bfd_is_und_section (S_GET_SEGMENT (fixP->fx_addsy))) | |
748 | { | |
749 | relP->addend -= S_GET_VALUE (fixP->fx_addsy); | |
750 | } | |
751 | ||
752 | relP->howto = bfd_reloc_type_lookup (stdoutput, code); | |
753 | if (! relP->howto) | |
754 | { | |
755 | const char *name; | |
756 | ||
757 | name = S_GET_NAME (fixP->fx_addsy); | |
758 | if (name == NULL) | |
759 | name = _("<unknown>"); | |
760 | as_fatal (_("Cannot generate relocation type for symbol %s, code %s"), | |
761 | name, bfd_get_reloc_code_name (code)); | |
762 | } | |
763 | ||
764 | return relP; | |
765 | } | |
766 | ||
767 | /* Decide from what point a pc-relative relocation is relative to, | |
768 | relative to the pc-relative fixup. Er, relatively speaking. */ | |
769 | long | |
770 | md_pcrel_from (fixS *fixP) | |
771 | { | |
772 | valueT addr = fixP->fx_where + fixP->fx_frag->fr_address; | |
773 | ||
20135e4c NC |
774 | switch (fixP->fx_r_type) |
775 | { | |
776 | case BFD_RELOC_32: | |
777 | return addr + 4; | |
f865a31d AG |
778 | case BFD_RELOC_MOXIE_10_PCREL: |
779 | return addr; | |
20135e4c NC |
780 | default: |
781 | abort (); | |
782 | return addr; | |
783 | } | |
784 | } |