Commit | Line | Data |
---|---|---|
20135e4c | 1 | /* tc-moxie.c -- Assemble code for moxie |
e202fa84 | 2 | Copyright 2009, 2012 |
20135e4c NC |
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 | ||
e202fa84 AG |
46 | static valueT md_chars_to_number (char * buf, int n); |
47 | ||
48 | /* Byte order. */ | |
49 | extern int target_big_endian; | |
50 | const char *moxie_target_format = DEFAULT_TARGET_FORMAT; | |
f865a31d | 51 | |
20135e4c NC |
52 | void |
53 | md_operand (expressionS *op __attribute__((unused))) | |
54 | { | |
55 | /* Empty for now. */ | |
56 | } | |
57 | ||
58 | /* This function is called once, at assembler startup time. It sets | |
59 | up the hash table with all the opcodes in it, and also initializes | |
60 | some aliases for compatibility with other assemblers. */ | |
61 | ||
62 | void | |
63 | md_begin (void) | |
64 | { | |
65 | int count; | |
66 | const moxie_opc_info_t *opcode; | |
67 | opcode_hash_control = hash_new (); | |
68 | ||
69 | /* Insert names into hash table. */ | |
70 | for (count = 0, opcode = moxie_form1_opc_info; count++ < 64; opcode++) | |
71 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); | |
72 | ||
73 | for (count = 0, opcode = moxie_form2_opc_info; count++ < 4; opcode++) | |
74 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); | |
75 | ||
f865a31d | 76 | for (count = 0, opcode = moxie_form3_opc_info; count++ < 10; opcode++) |
20135e4c NC |
77 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); |
78 | ||
79 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, 0); | |
80 | } | |
81 | ||
82 | /* Parse an expression and then restore the input line pointer. */ | |
83 | ||
84 | static char * | |
85 | parse_exp_save_ilp (char *s, expressionS *op) | |
86 | { | |
87 | char *save = input_line_pointer; | |
88 | ||
89 | input_line_pointer = s; | |
90 | expression (op); | |
91 | s = input_line_pointer; | |
92 | input_line_pointer = save; | |
93 | return s; | |
94 | } | |
95 | ||
96 | static int | |
97 | parse_register_operand (char **ptr) | |
98 | { | |
99 | int reg; | |
100 | char *s = *ptr; | |
101 | ||
102 | if (*s != '$') | |
103 | { | |
20203fb9 | 104 | as_bad (_("expecting register")); |
20135e4c NC |
105 | ignore_rest_of_line (); |
106 | return -1; | |
107 | } | |
108 | if (s[1] == 'f' && s[2] == 'p') | |
109 | { | |
110 | *ptr += 3; | |
111 | return 0; | |
112 | } | |
113 | if (s[1] == 's' && s[2] == 'p') | |
114 | { | |
115 | *ptr += 3; | |
116 | return 1; | |
117 | } | |
118 | if (s[1] == 'r') | |
119 | { | |
120 | reg = s[2] - '0'; | |
121 | if ((reg < 0) || (reg > 9)) | |
122 | { | |
20203fb9 | 123 | as_bad (_("illegal register number")); |
20135e4c NC |
124 | ignore_rest_of_line (); |
125 | return -1; | |
126 | } | |
127 | if (reg == 1) | |
128 | { | |
129 | int r2 = s[3] - '0'; | |
130 | if ((r2 >= 0) && (r2 <= 3)) | |
131 | { | |
132 | reg = 10 + r2; | |
133 | *ptr += 1; | |
134 | } | |
135 | } | |
136 | } | |
137 | else | |
138 | { | |
20203fb9 | 139 | as_bad (_("illegal register number")); |
20135e4c NC |
140 | ignore_rest_of_line (); |
141 | return -1; | |
142 | } | |
143 | ||
144 | *ptr += 3; | |
145 | ||
146 | return reg + 2; | |
147 | } | |
148 | ||
149 | /* This is the guts of the machine-dependent assembler. STR points to | |
150 | a machine dependent instruction. This function is supposed to emit | |
151 | the frags/bytes it assembles to. */ | |
152 | ||
153 | void | |
154 | md_assemble (char *str) | |
155 | { | |
156 | char *op_start; | |
157 | char *op_end; | |
158 | ||
159 | moxie_opc_info_t *opcode; | |
160 | char *p; | |
161 | char pend; | |
162 | ||
163 | unsigned short iword = 0; | |
164 | ||
165 | int nlen = 0; | |
166 | ||
167 | /* Drop leading whitespace. */ | |
168 | while (*str == ' ') | |
169 | str++; | |
170 | ||
171 | /* Find the op code end. */ | |
172 | op_start = str; | |
173 | for (op_end = str; | |
174 | *op_end && !is_end_of_line[*op_end & 0xff] && *op_end != ' '; | |
175 | op_end++) | |
176 | nlen++; | |
177 | ||
178 | pend = *op_end; | |
179 | *op_end = 0; | |
180 | ||
181 | if (nlen == 0) | |
182 | as_bad (_("can't find opcode ")); | |
183 | opcode = (moxie_opc_info_t *) hash_find (opcode_hash_control, op_start); | |
184 | *op_end = pend; | |
185 | ||
186 | if (opcode == NULL) | |
187 | { | |
188 | as_bad (_("unknown opcode %s"), op_start); | |
189 | return; | |
190 | } | |
191 | ||
192 | p = frag_more (2); | |
193 | ||
194 | switch (opcode->itype) | |
195 | { | |
196 | case MOXIE_F2_A8V: | |
197 | iword = (1<<15) | (opcode->opcode << 12); | |
198 | while (ISSPACE (*op_end)) | |
199 | op_end++; | |
200 | { | |
201 | expressionS arg; | |
202 | int reg; | |
203 | reg = parse_register_operand (&op_end); | |
204 | iword += (reg << 8); | |
205 | if (*op_end != ',') | |
2cbd2211 | 206 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
207 | op_end++; |
208 | op_end = parse_exp_save_ilp (op_end, &arg); | |
209 | fix_new_exp (frag_now, | |
e202fa84 | 210 | ((p + (target_big_endian ? 1 : 0)) - frag_now->fr_literal), |
20135e4c NC |
211 | 1, |
212 | &arg, | |
213 | 0, | |
214 | BFD_RELOC_8); | |
215 | } | |
216 | break; | |
217 | case MOXIE_F1_AB: | |
218 | iword = opcode->opcode << 8; | |
219 | while (ISSPACE (*op_end)) | |
220 | op_end++; | |
221 | { | |
222 | int dest, src; | |
223 | dest = parse_register_operand (&op_end); | |
224 | if (*op_end != ',') | |
2cbd2211 | 225 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
226 | op_end++; |
227 | src = parse_register_operand (&op_end); | |
228 | iword += (dest << 4) + src; | |
229 | while (ISSPACE (*op_end)) | |
230 | op_end++; | |
231 | if (*op_end != 0) | |
20203fb9 | 232 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
233 | } |
234 | break; | |
235 | case MOXIE_F1_A4: | |
236 | iword = opcode->opcode << 8; | |
237 | while (ISSPACE (*op_end)) | |
238 | op_end++; | |
239 | { | |
240 | expressionS arg; | |
241 | char *where; | |
242 | int regnum; | |
243 | ||
244 | regnum = parse_register_operand (&op_end); | |
245 | while (ISSPACE (*op_end)) | |
246 | op_end++; | |
247 | ||
248 | iword += (regnum << 4); | |
249 | ||
250 | if (*op_end != ',') | |
251 | { | |
20203fb9 | 252 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
253 | ignore_rest_of_line (); |
254 | return; | |
255 | } | |
256 | op_end++; | |
257 | ||
258 | op_end = parse_exp_save_ilp (op_end, &arg); | |
259 | where = frag_more (4); | |
260 | fix_new_exp (frag_now, | |
261 | (where - frag_now->fr_literal), | |
262 | 4, | |
263 | &arg, | |
264 | 0, | |
265 | BFD_RELOC_32); | |
266 | } | |
267 | break; | |
d7a5ed35 | 268 | case MOXIE_F1_M: |
20135e4c NC |
269 | case MOXIE_F1_4: |
270 | iword = opcode->opcode << 8; | |
271 | while (ISSPACE (*op_end)) | |
272 | op_end++; | |
273 | { | |
274 | expressionS arg; | |
275 | char *where; | |
276 | ||
277 | op_end = parse_exp_save_ilp (op_end, &arg); | |
278 | where = frag_more (4); | |
279 | fix_new_exp (frag_now, | |
280 | (where - frag_now->fr_literal), | |
281 | 4, | |
282 | &arg, | |
283 | 0, | |
284 | BFD_RELOC_32); | |
285 | } | |
286 | break; | |
287 | case MOXIE_F1_NARG: | |
288 | iword = opcode->opcode << 8; | |
289 | while (ISSPACE (*op_end)) | |
290 | op_end++; | |
291 | if (*op_end != 0) | |
20203fb9 | 292 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
293 | break; |
294 | case MOXIE_F1_A: | |
295 | iword = opcode->opcode << 8; | |
296 | while (ISSPACE (*op_end)) | |
297 | op_end++; | |
298 | { | |
299 | int reg; | |
300 | reg = parse_register_operand (&op_end); | |
301 | while (ISSPACE (*op_end)) | |
302 | op_end++; | |
303 | if (*op_end != 0) | |
20203fb9 | 304 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
305 | iword += (reg << 4); |
306 | } | |
307 | break; | |
308 | case MOXIE_F1_ABi: | |
309 | iword = opcode->opcode << 8; | |
310 | while (ISSPACE (*op_end)) | |
311 | op_end++; | |
312 | { | |
313 | int a, b; | |
314 | a = parse_register_operand (&op_end); | |
315 | if (*op_end != ',') | |
2cbd2211 | 316 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
317 | op_end++; |
318 | if (*op_end != '(') | |
319 | { | |
20203fb9 | 320 | as_bad (_("expecting indirect register `($rA)'")); |
20135e4c NC |
321 | ignore_rest_of_line (); |
322 | return; | |
323 | } | |
324 | op_end++; | |
325 | b = parse_register_operand (&op_end); | |
326 | if (*op_end != ')') | |
327 | { | |
20203fb9 | 328 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
329 | ignore_rest_of_line (); |
330 | return; | |
331 | } | |
332 | op_end++; | |
333 | iword += (a << 4) + b; | |
334 | while (ISSPACE (*op_end)) | |
335 | op_end++; | |
336 | if (*op_end != 0) | |
20203fb9 | 337 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
338 | } |
339 | break; | |
340 | case MOXIE_F1_AiB: | |
341 | iword = opcode->opcode << 8; | |
342 | while (ISSPACE (*op_end)) | |
343 | op_end++; | |
344 | { | |
345 | int a, b; | |
346 | if (*op_end != '(') | |
347 | { | |
20203fb9 | 348 | as_bad (_("expecting indirect register `($rA)'")); |
20135e4c NC |
349 | ignore_rest_of_line (); |
350 | return; | |
351 | } | |
352 | op_end++; | |
353 | a = parse_register_operand (&op_end); | |
354 | if (*op_end != ')') | |
355 | { | |
20203fb9 | 356 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
357 | ignore_rest_of_line (); |
358 | return; | |
359 | } | |
360 | op_end++; | |
361 | if (*op_end != ',') | |
2cbd2211 | 362 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
363 | op_end++; |
364 | b = parse_register_operand (&op_end); | |
365 | iword += (a << 4) + b; | |
366 | while (ISSPACE (*op_end)) | |
367 | op_end++; | |
368 | if (*op_end != 0) | |
20203fb9 | 369 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
370 | } |
371 | break; | |
372 | case MOXIE_F1_4A: | |
373 | iword = opcode->opcode << 8; | |
374 | while (ISSPACE (*op_end)) | |
375 | op_end++; | |
376 | { | |
377 | expressionS arg; | |
378 | char *where; | |
379 | int a; | |
380 | ||
381 | op_end = parse_exp_save_ilp (op_end, &arg); | |
382 | where = frag_more (4); | |
383 | fix_new_exp (frag_now, | |
384 | (where - frag_now->fr_literal), | |
385 | 4, | |
386 | &arg, | |
387 | 0, | |
388 | BFD_RELOC_32); | |
389 | ||
390 | if (*op_end != ',') | |
391 | { | |
20203fb9 | 392 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
393 | ignore_rest_of_line (); |
394 | return; | |
395 | } | |
396 | op_end++; | |
397 | ||
398 | a = parse_register_operand (&op_end); | |
399 | while (ISSPACE (*op_end)) | |
400 | op_end++; | |
401 | if (*op_end != 0) | |
20203fb9 | 402 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
403 | |
404 | iword += (a << 4); | |
405 | } | |
406 | break; | |
407 | case MOXIE_F1_ABi4: | |
408 | iword = opcode->opcode << 8; | |
409 | while (ISSPACE (*op_end)) | |
410 | op_end++; | |
411 | { | |
412 | expressionS arg; | |
413 | char *offset; | |
414 | int a, b; | |
415 | ||
416 | a = parse_register_operand (&op_end); | |
417 | while (ISSPACE (*op_end)) | |
418 | op_end++; | |
419 | ||
420 | if (*op_end != ',') | |
421 | { | |
20203fb9 | 422 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
423 | ignore_rest_of_line (); |
424 | return; | |
425 | } | |
426 | op_end++; | |
427 | ||
428 | op_end = parse_exp_save_ilp (op_end, &arg); | |
429 | offset = frag_more (4); | |
430 | fix_new_exp (frag_now, | |
431 | (offset - frag_now->fr_literal), | |
432 | 4, | |
433 | &arg, | |
434 | 0, | |
435 | BFD_RELOC_32); | |
436 | ||
437 | if (*op_end != '(') | |
438 | { | |
20203fb9 | 439 | as_bad (_("expecting indirect register `($rX)'")); |
20135e4c NC |
440 | ignore_rest_of_line (); |
441 | return; | |
442 | } | |
443 | op_end++; | |
444 | b = parse_register_operand (&op_end); | |
445 | if (*op_end != ')') | |
446 | { | |
20203fb9 | 447 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
448 | ignore_rest_of_line (); |
449 | return; | |
450 | } | |
451 | op_end++; | |
452 | ||
453 | while (ISSPACE (*op_end)) | |
454 | op_end++; | |
455 | if (*op_end != 0) | |
20203fb9 | 456 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
457 | |
458 | iword += (a << 4) + b; | |
459 | } | |
460 | break; | |
461 | case MOXIE_F1_AiB4: | |
462 | iword = opcode->opcode << 8; | |
463 | while (ISSPACE (*op_end)) | |
464 | op_end++; | |
465 | { | |
466 | expressionS arg; | |
467 | char *offset; | |
468 | int a, b; | |
469 | ||
470 | op_end = parse_exp_save_ilp (op_end, &arg); | |
471 | offset = frag_more (4); | |
472 | fix_new_exp (frag_now, | |
473 | (offset - frag_now->fr_literal), | |
474 | 4, | |
475 | &arg, | |
476 | 0, | |
477 | BFD_RELOC_32); | |
478 | ||
479 | if (*op_end != '(') | |
480 | { | |
20203fb9 | 481 | as_bad (_("expecting indirect register `($rX)'")); |
20135e4c NC |
482 | ignore_rest_of_line (); |
483 | return; | |
484 | } | |
485 | op_end++; | |
486 | a = parse_register_operand (&op_end); | |
487 | if (*op_end != ')') | |
488 | { | |
20203fb9 | 489 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
490 | ignore_rest_of_line (); |
491 | return; | |
492 | } | |
493 | op_end++; | |
494 | ||
495 | if (*op_end != ',') | |
496 | { | |
20203fb9 | 497 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
498 | ignore_rest_of_line (); |
499 | return; | |
500 | } | |
501 | op_end++; | |
502 | ||
503 | b = parse_register_operand (&op_end); | |
504 | while (ISSPACE (*op_end)) | |
505 | op_end++; | |
506 | ||
507 | while (ISSPACE (*op_end)) | |
508 | op_end++; | |
509 | if (*op_end != 0) | |
20203fb9 | 510 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
511 | |
512 | iword += (a << 4) + b; | |
513 | } | |
514 | break; | |
515 | case MOXIE_F2_NARG: | |
516 | iword = opcode->opcode << 12; | |
517 | while (ISSPACE (*op_end)) | |
518 | op_end++; | |
519 | if (*op_end != 0) | |
20203fb9 | 520 | as_warn (_("extra stuff on line ignored")); |
20135e4c | 521 | break; |
f865a31d AG |
522 | case MOXIE_F3_PCREL: |
523 | iword = (3<<14) | (opcode->opcode << 10); | |
524 | while (ISSPACE (*op_end)) | |
525 | op_end++; | |
526 | { | |
527 | expressionS arg; | |
528 | ||
529 | op_end = parse_exp_save_ilp (op_end, &arg); | |
530 | fix_new_exp (frag_now, | |
531 | (p - frag_now->fr_literal), | |
532 | 2, | |
533 | &arg, | |
534 | TRUE, | |
535 | BFD_RELOC_MOXIE_10_PCREL); | |
536 | } | |
537 | break; | |
20135e4c | 538 | default: |
20203fb9 | 539 | abort (); |
20135e4c NC |
540 | } |
541 | ||
542 | md_number_to_chars (p, iword, 2); | |
543 | ||
544 | while (ISSPACE (*op_end)) | |
545 | op_end++; | |
546 | ||
547 | if (*op_end != 0) | |
20203fb9 | 548 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
549 | |
550 | if (pending_reloc) | |
20203fb9 | 551 | as_bad (_("Something forgot to clean up\n")); |
20135e4c NC |
552 | } |
553 | ||
554 | /* Turn a string in input_line_pointer into a floating point constant | |
555 | of type type, and store the appropriate bytes in *LITP. The number | |
556 | of LITTLENUMS emitted is stored in *SIZEP . An error message is | |
557 | returned, or NULL on OK. */ | |
558 | ||
559 | char * | |
560 | md_atof (int type, char *litP, int *sizeP) | |
561 | { | |
562 | int prec; | |
563 | LITTLENUM_TYPE words[4]; | |
564 | char *t; | |
565 | int i; | |
566 | ||
567 | switch (type) | |
568 | { | |
569 | case 'f': | |
570 | prec = 2; | |
571 | break; | |
572 | ||
573 | case 'd': | |
574 | prec = 4; | |
575 | break; | |
576 | ||
577 | default: | |
578 | *sizeP = 0; | |
579 | return _("bad call to md_atof"); | |
580 | } | |
581 | ||
582 | t = atof_ieee (input_line_pointer, type, words); | |
583 | if (t) | |
584 | input_line_pointer = t; | |
585 | ||
586 | *sizeP = prec * 2; | |
587 | ||
588 | for (i = prec - 1; i >= 0; i--) | |
589 | { | |
590 | md_number_to_chars (litP, (valueT) words[i], 2); | |
591 | litP += 2; | |
592 | } | |
593 | ||
594 | return NULL; | |
595 | } | |
e202fa84 AG |
596 | |
597 | enum options | |
598 | { | |
599 | OPTION_EB = OPTION_MD_BASE, | |
600 | OPTION_EL, | |
601 | }; | |
20135e4c NC |
602 | |
603 | struct option md_longopts[] = | |
604 | { | |
e202fa84 AG |
605 | { "EB", no_argument, NULL, OPTION_EB}, |
606 | { "EL", no_argument, NULL, OPTION_EL}, | |
607 | { NULL, no_argument, NULL, 0} | |
20135e4c | 608 | }; |
e202fa84 | 609 | |
20135e4c | 610 | size_t md_longopts_size = sizeof (md_longopts); |
e202fa84 AG |
611 | \f |
612 | const char *md_shortopts = ""; | |
20135e4c | 613 | |
20135e4c NC |
614 | int |
615 | md_parse_option (int c ATTRIBUTE_UNUSED, char *arg ATTRIBUTE_UNUSED) | |
616 | { | |
e202fa84 AG |
617 | switch (c) |
618 | { | |
619 | case OPTION_EB: | |
620 | target_big_endian = 1; | |
621 | moxie_target_format = "elf32-bigmoxie"; | |
622 | break; | |
623 | case OPTION_EL: | |
624 | target_big_endian = 0; | |
625 | moxie_target_format = "elf32-littlemoxie"; | |
626 | break; | |
627 | default: | |
628 | return 0; | |
629 | } | |
630 | ||
631 | return 1; | |
20135e4c NC |
632 | } |
633 | ||
634 | void | |
635 | md_show_usage (FILE *stream ATTRIBUTE_UNUSED) | |
636 | { | |
e202fa84 AG |
637 | fprintf (stream, _("\ |
638 | -EB assemble for a big endian system (default)\n\ | |
639 | -EL assemble for a little endian system\n")); | |
20135e4c NC |
640 | } |
641 | ||
642 | /* Apply a fixup to the object file. */ | |
643 | ||
644 | void | |
f865a31d AG |
645 | md_apply_fix (fixS *fixP ATTRIBUTE_UNUSED, |
646 | valueT * valP ATTRIBUTE_UNUSED, segT seg ATTRIBUTE_UNUSED) | |
20135e4c NC |
647 | { |
648 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
649 | long val = *valP; | |
f865a31d | 650 | long newval; |
20135e4c | 651 | long max, min; |
20135e4c NC |
652 | |
653 | max = min = 0; | |
20135e4c NC |
654 | switch (fixP->fx_r_type) |
655 | { | |
656 | case BFD_RELOC_32: | |
e202fa84 AG |
657 | if (target_big_endian) |
658 | { | |
659 | buf[0] = val >> 24; | |
660 | buf[1] = val >> 16; | |
661 | buf[2] = val >> 8; | |
662 | buf[3] = val >> 0; | |
663 | } | |
664 | else | |
665 | { | |
666 | buf[3] = val >> 24; | |
667 | buf[2] = val >> 16; | |
668 | buf[1] = val >> 8; | |
669 | buf[0] = val >> 0; | |
670 | } | |
671 | buf += 4; | |
20135e4c NC |
672 | break; |
673 | ||
674 | case BFD_RELOC_16: | |
e202fa84 AG |
675 | if (target_big_endian) |
676 | { | |
677 | buf[0] = val >> 8; | |
678 | buf[1] = val >> 0; | |
679 | } | |
680 | else | |
681 | { | |
682 | buf[1] = val >> 8; | |
683 | buf[0] = val >> 0; | |
684 | } | |
685 | buf += 2; | |
20135e4c NC |
686 | break; |
687 | ||
688 | case BFD_RELOC_8: | |
689 | *buf++ = val; | |
690 | break; | |
691 | ||
f865a31d AG |
692 | case BFD_RELOC_MOXIE_10_PCREL: |
693 | if (!val) | |
694 | break; | |
695 | if (val < -1024 || val > 1022) | |
696 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
697 | _("pcrel too far BFD_RELOC_MOXIE_10")); | |
698 | /* 11 bit offset even numbered, so we remove right bit. */ | |
699 | val >>= 1; | |
700 | newval = md_chars_to_number (buf, 2); | |
701 | newval |= val & 0x03ff; | |
702 | md_number_to_chars (buf, newval, 2); | |
703 | break; | |
704 | ||
20135e4c NC |
705 | default: |
706 | abort (); | |
707 | } | |
708 | ||
709 | if (max != 0 && (val < min || val > max)) | |
710 | as_bad_where (fixP->fx_file, fixP->fx_line, _("offset out of range")); | |
711 | ||
712 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) | |
713 | fixP->fx_done = 1; | |
714 | } | |
715 | ||
e202fa84 | 716 | /* Put number into target byte order. */ |
20135e4c NC |
717 | |
718 | void | |
e202fa84 | 719 | md_number_to_chars (char * ptr, valueT use, int nbytes) |
20135e4c | 720 | { |
e202fa84 AG |
721 | if (target_big_endian) |
722 | number_to_chars_bigendian (ptr, use, nbytes); | |
723 | else | |
724 | number_to_chars_littleendian (ptr, use, nbytes); | |
20135e4c NC |
725 | } |
726 | ||
f865a31d AG |
727 | /* Convert from target byte order to host byte order. */ |
728 | ||
e202fa84 AG |
729 | static valueT |
730 | md_chars_to_number (char * buf, int n) | |
f865a31d | 731 | { |
e202fa84 AG |
732 | valueT result = 0; |
733 | unsigned char * where = (unsigned char *) buf; | |
f865a31d | 734 | |
e202fa84 AG |
735 | if (target_big_endian) |
736 | { | |
737 | while (n--) | |
738 | { | |
739 | result <<= 8; | |
740 | result |= (*where++ & 255); | |
741 | } | |
742 | } | |
743 | else | |
f865a31d | 744 | { |
e202fa84 AG |
745 | while (n--) |
746 | { | |
747 | result <<= 8; | |
748 | result |= (where[n] & 255); | |
749 | } | |
f865a31d AG |
750 | } |
751 | ||
e202fa84 | 752 | return result; |
f865a31d AG |
753 | } |
754 | ||
20135e4c NC |
755 | /* Generate a machine-dependent relocation. */ |
756 | arelent * | |
757 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixP) | |
758 | { | |
759 | arelent *relP; | |
760 | bfd_reloc_code_real_type code; | |
761 | ||
762 | switch (fixP->fx_r_type) | |
763 | { | |
764 | case BFD_RELOC_32: | |
765 | code = fixP->fx_r_type; | |
766 | break; | |
f865a31d AG |
767 | case BFD_RELOC_MOXIE_10_PCREL: |
768 | code = fixP->fx_r_type; | |
769 | break; | |
20135e4c NC |
770 | default: |
771 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
772 | _("Semantics error. This type of operand can not be relocated, it must be an assembly-time constant")); | |
773 | return 0; | |
774 | } | |
775 | ||
776 | relP = xmalloc (sizeof (arelent)); | |
9c2799c2 | 777 | gas_assert (relP != 0); |
20135e4c NC |
778 | relP->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
779 | *relP->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); | |
780 | relP->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
781 | ||
782 | relP->addend = fixP->fx_offset; | |
783 | ||
784 | /* This is the standard place for KLUDGEs to work around bugs in | |
785 | bfd_install_relocation (first such note in the documentation | |
786 | appears with binutils-2.8). | |
787 | ||
788 | That function bfd_install_relocation does the wrong thing with | |
789 | putting stuff into the addend of a reloc (it should stay out) for a | |
790 | weak symbol. The really bad thing is that it adds the | |
791 | "segment-relative offset" of the symbol into the reloc. In this | |
792 | case, the reloc should instead be relative to the symbol with no | |
793 | other offset than the assembly code shows; and since the symbol is | |
794 | weak, any local definition should be ignored until link time (or | |
795 | thereafter). | |
796 | To wit: weaksym+42 should be weaksym+42 in the reloc, | |
797 | not weaksym+(offset_from_segment_of_local_weaksym_definition) | |
798 | ||
799 | To "work around" this, we subtract the segment-relative offset of | |
800 | "known" weak symbols. This evens out the extra offset. | |
801 | ||
802 | That happens for a.out but not for ELF, since for ELF, | |
803 | bfd_install_relocation uses the "special function" field of the | |
804 | howto, and does not execute the code that needs to be undone. */ | |
805 | ||
806 | if (OUTPUT_FLAVOR == bfd_target_aout_flavour | |
807 | && fixP->fx_addsy && S_IS_WEAK (fixP->fx_addsy) | |
808 | && ! bfd_is_und_section (S_GET_SEGMENT (fixP->fx_addsy))) | |
809 | { | |
810 | relP->addend -= S_GET_VALUE (fixP->fx_addsy); | |
811 | } | |
812 | ||
813 | relP->howto = bfd_reloc_type_lookup (stdoutput, code); | |
814 | if (! relP->howto) | |
815 | { | |
816 | const char *name; | |
817 | ||
818 | name = S_GET_NAME (fixP->fx_addsy); | |
819 | if (name == NULL) | |
820 | name = _("<unknown>"); | |
821 | as_fatal (_("Cannot generate relocation type for symbol %s, code %s"), | |
822 | name, bfd_get_reloc_code_name (code)); | |
823 | } | |
824 | ||
825 | return relP; | |
826 | } | |
827 | ||
828 | /* Decide from what point a pc-relative relocation is relative to, | |
829 | relative to the pc-relative fixup. Er, relatively speaking. */ | |
830 | long | |
831 | md_pcrel_from (fixS *fixP) | |
832 | { | |
833 | valueT addr = fixP->fx_where + fixP->fx_frag->fr_address; | |
834 | ||
20135e4c NC |
835 | switch (fixP->fx_r_type) |
836 | { | |
837 | case BFD_RELOC_32: | |
838 | return addr + 4; | |
f865a31d | 839 | case BFD_RELOC_MOXIE_10_PCREL: |
7078b409 AG |
840 | /* Offset is from the end of the instruction. */ |
841 | return addr + 2; | |
20135e4c NC |
842 | default: |
843 | abort (); | |
844 | return addr; | |
845 | } | |
846 | } |