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20135e4c | 1 | /* tc-moxie.c -- Assemble code for moxie |
4b95cf5c | 2 | Copyright (C) 2009-2014 Free Software Foundation, Inc. |
20135e4c NC |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, | |
19 | Boston, MA 02110-1301, USA. */ | |
20 | ||
21 | /* Contributed by Anthony Green <green@moxielogic.com>. */ | |
22 | ||
23 | #include "as.h" | |
24 | #include "safe-ctype.h" | |
25 | #include "opcode/moxie.h" | |
26 | #include "elf/moxie.h" | |
27 | ||
28 | extern const moxie_opc_info_t moxie_opc_info[128]; | |
29 | ||
30 | const char comment_chars[] = "#"; | |
31 | const char line_separator_chars[] = ";"; | |
32 | const char line_comment_chars[] = "#"; | |
33 | ||
34 | static int pending_reloc; | |
35 | static struct hash_control *opcode_hash_control; | |
36 | ||
37 | const pseudo_typeS md_pseudo_table[] = | |
38 | { | |
39 | {0, 0, 0} | |
40 | }; | |
41 | ||
42 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
43 | const char EXP_CHARS[] = "eE"; | |
44 | ||
e202fa84 AG |
45 | static valueT md_chars_to_number (char * buf, int n); |
46 | ||
47 | /* Byte order. */ | |
48 | extern int target_big_endian; | |
49 | const char *moxie_target_format = DEFAULT_TARGET_FORMAT; | |
f865a31d | 50 | |
20135e4c NC |
51 | void |
52 | md_operand (expressionS *op __attribute__((unused))) | |
53 | { | |
54 | /* Empty for now. */ | |
55 | } | |
56 | ||
57 | /* This function is called once, at assembler startup time. It sets | |
58 | up the hash table with all the opcodes in it, and also initializes | |
59 | some aliases for compatibility with other assemblers. */ | |
60 | ||
61 | void | |
62 | md_begin (void) | |
63 | { | |
64 | int count; | |
65 | const moxie_opc_info_t *opcode; | |
66 | opcode_hash_control = hash_new (); | |
67 | ||
68 | /* Insert names into hash table. */ | |
69 | for (count = 0, opcode = moxie_form1_opc_info; count++ < 64; opcode++) | |
70 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); | |
71 | ||
72 | for (count = 0, opcode = moxie_form2_opc_info; count++ < 4; opcode++) | |
73 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); | |
74 | ||
f865a31d | 75 | for (count = 0, opcode = moxie_form3_opc_info; count++ < 10; opcode++) |
20135e4c NC |
76 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); |
77 | ||
78 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, 0); | |
79 | } | |
80 | ||
81 | /* Parse an expression and then restore the input line pointer. */ | |
82 | ||
83 | static char * | |
84 | parse_exp_save_ilp (char *s, expressionS *op) | |
85 | { | |
86 | char *save = input_line_pointer; | |
87 | ||
88 | input_line_pointer = s; | |
89 | expression (op); | |
90 | s = input_line_pointer; | |
91 | input_line_pointer = save; | |
92 | return s; | |
93 | } | |
94 | ||
95 | static int | |
96 | parse_register_operand (char **ptr) | |
97 | { | |
98 | int reg; | |
99 | char *s = *ptr; | |
100 | ||
101 | if (*s != '$') | |
102 | { | |
20203fb9 | 103 | as_bad (_("expecting register")); |
20135e4c NC |
104 | ignore_rest_of_line (); |
105 | return -1; | |
106 | } | |
107 | if (s[1] == 'f' && s[2] == 'p') | |
108 | { | |
109 | *ptr += 3; | |
110 | return 0; | |
111 | } | |
112 | if (s[1] == 's' && s[2] == 'p') | |
113 | { | |
114 | *ptr += 3; | |
115 | return 1; | |
116 | } | |
117 | if (s[1] == 'r') | |
118 | { | |
119 | reg = s[2] - '0'; | |
120 | if ((reg < 0) || (reg > 9)) | |
121 | { | |
20203fb9 | 122 | as_bad (_("illegal register number")); |
20135e4c NC |
123 | ignore_rest_of_line (); |
124 | return -1; | |
125 | } | |
126 | if (reg == 1) | |
127 | { | |
128 | int r2 = s[3] - '0'; | |
129 | if ((r2 >= 0) && (r2 <= 3)) | |
130 | { | |
131 | reg = 10 + r2; | |
132 | *ptr += 1; | |
133 | } | |
134 | } | |
135 | } | |
136 | else | |
137 | { | |
20203fb9 | 138 | as_bad (_("illegal register number")); |
20135e4c NC |
139 | ignore_rest_of_line (); |
140 | return -1; | |
141 | } | |
142 | ||
143 | *ptr += 3; | |
144 | ||
145 | return reg + 2; | |
146 | } | |
147 | ||
148 | /* This is the guts of the machine-dependent assembler. STR points to | |
149 | a machine dependent instruction. This function is supposed to emit | |
150 | the frags/bytes it assembles to. */ | |
151 | ||
152 | void | |
153 | md_assemble (char *str) | |
154 | { | |
155 | char *op_start; | |
156 | char *op_end; | |
157 | ||
158 | moxie_opc_info_t *opcode; | |
159 | char *p; | |
160 | char pend; | |
161 | ||
162 | unsigned short iword = 0; | |
163 | ||
164 | int nlen = 0; | |
165 | ||
166 | /* Drop leading whitespace. */ | |
167 | while (*str == ' ') | |
168 | str++; | |
169 | ||
170 | /* Find the op code end. */ | |
171 | op_start = str; | |
172 | for (op_end = str; | |
173 | *op_end && !is_end_of_line[*op_end & 0xff] && *op_end != ' '; | |
174 | op_end++) | |
175 | nlen++; | |
176 | ||
177 | pend = *op_end; | |
178 | *op_end = 0; | |
179 | ||
180 | if (nlen == 0) | |
181 | as_bad (_("can't find opcode ")); | |
182 | opcode = (moxie_opc_info_t *) hash_find (opcode_hash_control, op_start); | |
183 | *op_end = pend; | |
184 | ||
185 | if (opcode == NULL) | |
186 | { | |
187 | as_bad (_("unknown opcode %s"), op_start); | |
188 | return; | |
189 | } | |
190 | ||
191 | p = frag_more (2); | |
192 | ||
193 | switch (opcode->itype) | |
194 | { | |
195 | case MOXIE_F2_A8V: | |
196 | iword = (1<<15) | (opcode->opcode << 12); | |
197 | while (ISSPACE (*op_end)) | |
198 | op_end++; | |
199 | { | |
200 | expressionS arg; | |
201 | int reg; | |
202 | reg = parse_register_operand (&op_end); | |
203 | iword += (reg << 8); | |
204 | if (*op_end != ',') | |
2cbd2211 | 205 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
206 | op_end++; |
207 | op_end = parse_exp_save_ilp (op_end, &arg); | |
208 | fix_new_exp (frag_now, | |
e202fa84 | 209 | ((p + (target_big_endian ? 1 : 0)) - frag_now->fr_literal), |
20135e4c NC |
210 | 1, |
211 | &arg, | |
212 | 0, | |
213 | BFD_RELOC_8); | |
214 | } | |
215 | break; | |
216 | case MOXIE_F1_AB: | |
217 | iword = opcode->opcode << 8; | |
218 | while (ISSPACE (*op_end)) | |
219 | op_end++; | |
220 | { | |
221 | int dest, src; | |
222 | dest = parse_register_operand (&op_end); | |
223 | if (*op_end != ',') | |
2cbd2211 | 224 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
225 | op_end++; |
226 | src = parse_register_operand (&op_end); | |
227 | iword += (dest << 4) + src; | |
228 | while (ISSPACE (*op_end)) | |
229 | op_end++; | |
230 | if (*op_end != 0) | |
20203fb9 | 231 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
232 | } |
233 | break; | |
234 | case MOXIE_F1_A4: | |
235 | iword = opcode->opcode << 8; | |
236 | while (ISSPACE (*op_end)) | |
237 | op_end++; | |
238 | { | |
239 | expressionS arg; | |
240 | char *where; | |
241 | int regnum; | |
242 | ||
243 | regnum = parse_register_operand (&op_end); | |
244 | while (ISSPACE (*op_end)) | |
245 | op_end++; | |
246 | ||
247 | iword += (regnum << 4); | |
248 | ||
249 | if (*op_end != ',') | |
250 | { | |
20203fb9 | 251 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
252 | ignore_rest_of_line (); |
253 | return; | |
254 | } | |
255 | op_end++; | |
256 | ||
257 | op_end = parse_exp_save_ilp (op_end, &arg); | |
258 | where = frag_more (4); | |
259 | fix_new_exp (frag_now, | |
260 | (where - frag_now->fr_literal), | |
261 | 4, | |
262 | &arg, | |
263 | 0, | |
264 | BFD_RELOC_32); | |
265 | } | |
266 | break; | |
d7a5ed35 | 267 | case MOXIE_F1_M: |
20135e4c NC |
268 | case MOXIE_F1_4: |
269 | iword = opcode->opcode << 8; | |
270 | while (ISSPACE (*op_end)) | |
271 | op_end++; | |
272 | { | |
273 | expressionS arg; | |
274 | char *where; | |
275 | ||
276 | op_end = parse_exp_save_ilp (op_end, &arg); | |
277 | where = frag_more (4); | |
278 | fix_new_exp (frag_now, | |
279 | (where - frag_now->fr_literal), | |
280 | 4, | |
281 | &arg, | |
282 | 0, | |
283 | BFD_RELOC_32); | |
284 | } | |
285 | break; | |
286 | case MOXIE_F1_NARG: | |
287 | iword = opcode->opcode << 8; | |
288 | while (ISSPACE (*op_end)) | |
289 | op_end++; | |
290 | if (*op_end != 0) | |
20203fb9 | 291 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
292 | break; |
293 | case MOXIE_F1_A: | |
294 | iword = opcode->opcode << 8; | |
295 | while (ISSPACE (*op_end)) | |
296 | op_end++; | |
297 | { | |
298 | int reg; | |
299 | reg = parse_register_operand (&op_end); | |
300 | while (ISSPACE (*op_end)) | |
301 | op_end++; | |
302 | if (*op_end != 0) | |
20203fb9 | 303 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
304 | iword += (reg << 4); |
305 | } | |
306 | break; | |
307 | case MOXIE_F1_ABi: | |
308 | iword = opcode->opcode << 8; | |
309 | while (ISSPACE (*op_end)) | |
310 | op_end++; | |
311 | { | |
312 | int a, b; | |
313 | a = parse_register_operand (&op_end); | |
314 | if (*op_end != ',') | |
2cbd2211 | 315 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
316 | op_end++; |
317 | if (*op_end != '(') | |
318 | { | |
20203fb9 | 319 | as_bad (_("expecting indirect register `($rA)'")); |
20135e4c NC |
320 | ignore_rest_of_line (); |
321 | return; | |
322 | } | |
323 | op_end++; | |
324 | b = parse_register_operand (&op_end); | |
325 | if (*op_end != ')') | |
326 | { | |
20203fb9 | 327 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
328 | ignore_rest_of_line (); |
329 | return; | |
330 | } | |
331 | op_end++; | |
332 | iword += (a << 4) + b; | |
333 | while (ISSPACE (*op_end)) | |
334 | op_end++; | |
335 | if (*op_end != 0) | |
20203fb9 | 336 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
337 | } |
338 | break; | |
339 | case MOXIE_F1_AiB: | |
340 | iword = opcode->opcode << 8; | |
341 | while (ISSPACE (*op_end)) | |
342 | op_end++; | |
343 | { | |
344 | int a, b; | |
345 | if (*op_end != '(') | |
346 | { | |
20203fb9 | 347 | as_bad (_("expecting indirect register `($rA)'")); |
20135e4c NC |
348 | ignore_rest_of_line (); |
349 | return; | |
350 | } | |
351 | op_end++; | |
352 | a = parse_register_operand (&op_end); | |
353 | if (*op_end != ')') | |
354 | { | |
20203fb9 | 355 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
356 | ignore_rest_of_line (); |
357 | return; | |
358 | } | |
359 | op_end++; | |
360 | if (*op_end != ',') | |
2cbd2211 | 361 | as_warn (_("expecting comma delimited register operands")); |
20135e4c NC |
362 | op_end++; |
363 | b = parse_register_operand (&op_end); | |
364 | iword += (a << 4) + b; | |
365 | while (ISSPACE (*op_end)) | |
366 | op_end++; | |
367 | if (*op_end != 0) | |
20203fb9 | 368 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
369 | } |
370 | break; | |
371 | case MOXIE_F1_4A: | |
372 | iword = opcode->opcode << 8; | |
373 | while (ISSPACE (*op_end)) | |
374 | op_end++; | |
375 | { | |
376 | expressionS arg; | |
377 | char *where; | |
378 | int a; | |
379 | ||
380 | op_end = parse_exp_save_ilp (op_end, &arg); | |
381 | where = frag_more (4); | |
382 | fix_new_exp (frag_now, | |
383 | (where - frag_now->fr_literal), | |
384 | 4, | |
385 | &arg, | |
386 | 0, | |
387 | BFD_RELOC_32); | |
388 | ||
389 | if (*op_end != ',') | |
390 | { | |
20203fb9 | 391 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
392 | ignore_rest_of_line (); |
393 | return; | |
394 | } | |
395 | op_end++; | |
396 | ||
397 | a = parse_register_operand (&op_end); | |
398 | while (ISSPACE (*op_end)) | |
399 | op_end++; | |
400 | if (*op_end != 0) | |
20203fb9 | 401 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
402 | |
403 | iword += (a << 4); | |
404 | } | |
405 | break; | |
406 | case MOXIE_F1_ABi4: | |
407 | iword = opcode->opcode << 8; | |
408 | while (ISSPACE (*op_end)) | |
409 | op_end++; | |
410 | { | |
411 | expressionS arg; | |
412 | char *offset; | |
413 | int a, b; | |
414 | ||
415 | a = parse_register_operand (&op_end); | |
416 | while (ISSPACE (*op_end)) | |
417 | op_end++; | |
418 | ||
419 | if (*op_end != ',') | |
420 | { | |
20203fb9 | 421 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
422 | ignore_rest_of_line (); |
423 | return; | |
424 | } | |
425 | op_end++; | |
426 | ||
427 | op_end = parse_exp_save_ilp (op_end, &arg); | |
428 | offset = frag_more (4); | |
429 | fix_new_exp (frag_now, | |
430 | (offset - frag_now->fr_literal), | |
431 | 4, | |
432 | &arg, | |
433 | 0, | |
434 | BFD_RELOC_32); | |
435 | ||
436 | if (*op_end != '(') | |
437 | { | |
20203fb9 | 438 | as_bad (_("expecting indirect register `($rX)'")); |
20135e4c NC |
439 | ignore_rest_of_line (); |
440 | return; | |
441 | } | |
442 | op_end++; | |
443 | b = parse_register_operand (&op_end); | |
444 | if (*op_end != ')') | |
445 | { | |
20203fb9 | 446 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
447 | ignore_rest_of_line (); |
448 | return; | |
449 | } | |
450 | op_end++; | |
451 | ||
452 | while (ISSPACE (*op_end)) | |
453 | op_end++; | |
454 | if (*op_end != 0) | |
20203fb9 | 455 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
456 | |
457 | iword += (a << 4) + b; | |
458 | } | |
459 | break; | |
460 | case MOXIE_F1_AiB4: | |
461 | iword = opcode->opcode << 8; | |
462 | while (ISSPACE (*op_end)) | |
463 | op_end++; | |
464 | { | |
465 | expressionS arg; | |
466 | char *offset; | |
467 | int a, b; | |
468 | ||
469 | op_end = parse_exp_save_ilp (op_end, &arg); | |
470 | offset = frag_more (4); | |
471 | fix_new_exp (frag_now, | |
472 | (offset - frag_now->fr_literal), | |
473 | 4, | |
474 | &arg, | |
475 | 0, | |
476 | BFD_RELOC_32); | |
477 | ||
478 | if (*op_end != '(') | |
479 | { | |
20203fb9 | 480 | as_bad (_("expecting indirect register `($rX)'")); |
20135e4c NC |
481 | ignore_rest_of_line (); |
482 | return; | |
483 | } | |
484 | op_end++; | |
485 | a = parse_register_operand (&op_end); | |
486 | if (*op_end != ')') | |
487 | { | |
20203fb9 | 488 | as_bad (_("missing closing parenthesis")); |
20135e4c NC |
489 | ignore_rest_of_line (); |
490 | return; | |
491 | } | |
492 | op_end++; | |
493 | ||
494 | if (*op_end != ',') | |
495 | { | |
20203fb9 | 496 | as_bad (_("expecting comma delimited operands")); |
20135e4c NC |
497 | ignore_rest_of_line (); |
498 | return; | |
499 | } | |
500 | op_end++; | |
501 | ||
502 | b = parse_register_operand (&op_end); | |
503 | while (ISSPACE (*op_end)) | |
504 | op_end++; | |
505 | ||
506 | while (ISSPACE (*op_end)) | |
507 | op_end++; | |
508 | if (*op_end != 0) | |
20203fb9 | 509 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
510 | |
511 | iword += (a << 4) + b; | |
512 | } | |
513 | break; | |
514 | case MOXIE_F2_NARG: | |
515 | iword = opcode->opcode << 12; | |
516 | while (ISSPACE (*op_end)) | |
517 | op_end++; | |
518 | if (*op_end != 0) | |
20203fb9 | 519 | as_warn (_("extra stuff on line ignored")); |
20135e4c | 520 | break; |
f865a31d AG |
521 | case MOXIE_F3_PCREL: |
522 | iword = (3<<14) | (opcode->opcode << 10); | |
523 | while (ISSPACE (*op_end)) | |
524 | op_end++; | |
525 | { | |
526 | expressionS arg; | |
527 | ||
528 | op_end = parse_exp_save_ilp (op_end, &arg); | |
529 | fix_new_exp (frag_now, | |
530 | (p - frag_now->fr_literal), | |
531 | 2, | |
532 | &arg, | |
533 | TRUE, | |
534 | BFD_RELOC_MOXIE_10_PCREL); | |
535 | } | |
536 | break; | |
20135e4c | 537 | default: |
20203fb9 | 538 | abort (); |
20135e4c NC |
539 | } |
540 | ||
541 | md_number_to_chars (p, iword, 2); | |
542 | ||
543 | while (ISSPACE (*op_end)) | |
544 | op_end++; | |
545 | ||
546 | if (*op_end != 0) | |
20203fb9 | 547 | as_warn (_("extra stuff on line ignored")); |
20135e4c NC |
548 | |
549 | if (pending_reloc) | |
20203fb9 | 550 | as_bad (_("Something forgot to clean up\n")); |
20135e4c NC |
551 | } |
552 | ||
553 | /* Turn a string in input_line_pointer into a floating point constant | |
554 | of type type, and store the appropriate bytes in *LITP. The number | |
555 | of LITTLENUMS emitted is stored in *SIZEP . An error message is | |
556 | returned, or NULL on OK. */ | |
557 | ||
558 | char * | |
559 | md_atof (int type, char *litP, int *sizeP) | |
560 | { | |
561 | int prec; | |
562 | LITTLENUM_TYPE words[4]; | |
563 | char *t; | |
564 | int i; | |
565 | ||
566 | switch (type) | |
567 | { | |
568 | case 'f': | |
569 | prec = 2; | |
570 | break; | |
571 | ||
572 | case 'd': | |
573 | prec = 4; | |
574 | break; | |
575 | ||
576 | default: | |
577 | *sizeP = 0; | |
578 | return _("bad call to md_atof"); | |
579 | } | |
580 | ||
581 | t = atof_ieee (input_line_pointer, type, words); | |
582 | if (t) | |
583 | input_line_pointer = t; | |
584 | ||
585 | *sizeP = prec * 2; | |
586 | ||
587 | for (i = prec - 1; i >= 0; i--) | |
588 | { | |
589 | md_number_to_chars (litP, (valueT) words[i], 2); | |
590 | litP += 2; | |
591 | } | |
592 | ||
593 | return NULL; | |
594 | } | |
e202fa84 AG |
595 | |
596 | enum options | |
597 | { | |
598 | OPTION_EB = OPTION_MD_BASE, | |
599 | OPTION_EL, | |
600 | }; | |
20135e4c NC |
601 | |
602 | struct option md_longopts[] = | |
603 | { | |
e202fa84 AG |
604 | { "EB", no_argument, NULL, OPTION_EB}, |
605 | { "EL", no_argument, NULL, OPTION_EL}, | |
606 | { NULL, no_argument, NULL, 0} | |
20135e4c | 607 | }; |
e202fa84 | 608 | |
20135e4c | 609 | size_t md_longopts_size = sizeof (md_longopts); |
e202fa84 AG |
610 | \f |
611 | const char *md_shortopts = ""; | |
20135e4c | 612 | |
20135e4c NC |
613 | int |
614 | md_parse_option (int c ATTRIBUTE_UNUSED, char *arg ATTRIBUTE_UNUSED) | |
615 | { | |
e202fa84 AG |
616 | switch (c) |
617 | { | |
618 | case OPTION_EB: | |
619 | target_big_endian = 1; | |
620 | moxie_target_format = "elf32-bigmoxie"; | |
621 | break; | |
622 | case OPTION_EL: | |
623 | target_big_endian = 0; | |
624 | moxie_target_format = "elf32-littlemoxie"; | |
625 | break; | |
626 | default: | |
627 | return 0; | |
628 | } | |
629 | ||
630 | return 1; | |
20135e4c NC |
631 | } |
632 | ||
633 | void | |
634 | md_show_usage (FILE *stream ATTRIBUTE_UNUSED) | |
635 | { | |
e202fa84 AG |
636 | fprintf (stream, _("\ |
637 | -EB assemble for a big endian system (default)\n\ | |
638 | -EL assemble for a little endian system\n")); | |
20135e4c NC |
639 | } |
640 | ||
641 | /* Apply a fixup to the object file. */ | |
642 | ||
643 | void | |
f865a31d AG |
644 | md_apply_fix (fixS *fixP ATTRIBUTE_UNUSED, |
645 | valueT * valP ATTRIBUTE_UNUSED, segT seg ATTRIBUTE_UNUSED) | |
20135e4c NC |
646 | { |
647 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
648 | long val = *valP; | |
f865a31d | 649 | long newval; |
20135e4c | 650 | long max, min; |
20135e4c NC |
651 | |
652 | max = min = 0; | |
20135e4c NC |
653 | switch (fixP->fx_r_type) |
654 | { | |
655 | case BFD_RELOC_32: | |
e202fa84 AG |
656 | if (target_big_endian) |
657 | { | |
658 | buf[0] = val >> 24; | |
659 | buf[1] = val >> 16; | |
660 | buf[2] = val >> 8; | |
661 | buf[3] = val >> 0; | |
662 | } | |
663 | else | |
664 | { | |
665 | buf[3] = val >> 24; | |
666 | buf[2] = val >> 16; | |
667 | buf[1] = val >> 8; | |
668 | buf[0] = val >> 0; | |
669 | } | |
670 | buf += 4; | |
20135e4c NC |
671 | break; |
672 | ||
673 | case BFD_RELOC_16: | |
e202fa84 AG |
674 | if (target_big_endian) |
675 | { | |
676 | buf[0] = val >> 8; | |
677 | buf[1] = val >> 0; | |
678 | } | |
679 | else | |
680 | { | |
681 | buf[1] = val >> 8; | |
682 | buf[0] = val >> 0; | |
683 | } | |
684 | buf += 2; | |
20135e4c NC |
685 | break; |
686 | ||
687 | case BFD_RELOC_8: | |
688 | *buf++ = val; | |
689 | break; | |
690 | ||
f865a31d AG |
691 | case BFD_RELOC_MOXIE_10_PCREL: |
692 | if (!val) | |
693 | break; | |
694 | if (val < -1024 || val > 1022) | |
695 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
696 | _("pcrel too far BFD_RELOC_MOXIE_10")); | |
697 | /* 11 bit offset even numbered, so we remove right bit. */ | |
698 | val >>= 1; | |
699 | newval = md_chars_to_number (buf, 2); | |
700 | newval |= val & 0x03ff; | |
701 | md_number_to_chars (buf, newval, 2); | |
702 | break; | |
703 | ||
20135e4c NC |
704 | default: |
705 | abort (); | |
706 | } | |
707 | ||
708 | if (max != 0 && (val < min || val > max)) | |
709 | as_bad_where (fixP->fx_file, fixP->fx_line, _("offset out of range")); | |
710 | ||
711 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) | |
712 | fixP->fx_done = 1; | |
713 | } | |
714 | ||
e202fa84 | 715 | /* Put number into target byte order. */ |
20135e4c NC |
716 | |
717 | void | |
e202fa84 | 718 | md_number_to_chars (char * ptr, valueT use, int nbytes) |
20135e4c | 719 | { |
e202fa84 AG |
720 | if (target_big_endian) |
721 | number_to_chars_bigendian (ptr, use, nbytes); | |
722 | else | |
723 | number_to_chars_littleendian (ptr, use, nbytes); | |
20135e4c NC |
724 | } |
725 | ||
f865a31d AG |
726 | /* Convert from target byte order to host byte order. */ |
727 | ||
e202fa84 AG |
728 | static valueT |
729 | md_chars_to_number (char * buf, int n) | |
f865a31d | 730 | { |
e202fa84 AG |
731 | valueT result = 0; |
732 | unsigned char * where = (unsigned char *) buf; | |
f865a31d | 733 | |
e202fa84 AG |
734 | if (target_big_endian) |
735 | { | |
736 | while (n--) | |
737 | { | |
738 | result <<= 8; | |
739 | result |= (*where++ & 255); | |
740 | } | |
741 | } | |
742 | else | |
f865a31d | 743 | { |
e202fa84 AG |
744 | while (n--) |
745 | { | |
746 | result <<= 8; | |
747 | result |= (where[n] & 255); | |
748 | } | |
f865a31d AG |
749 | } |
750 | ||
e202fa84 | 751 | return result; |
f865a31d AG |
752 | } |
753 | ||
20135e4c NC |
754 | /* Generate a machine-dependent relocation. */ |
755 | arelent * | |
756 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixP) | |
757 | { | |
758 | arelent *relP; | |
759 | bfd_reloc_code_real_type code; | |
760 | ||
761 | switch (fixP->fx_r_type) | |
762 | { | |
763 | case BFD_RELOC_32: | |
764 | code = fixP->fx_r_type; | |
765 | break; | |
f865a31d AG |
766 | case BFD_RELOC_MOXIE_10_PCREL: |
767 | code = fixP->fx_r_type; | |
768 | break; | |
20135e4c NC |
769 | default: |
770 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
771 | _("Semantics error. This type of operand can not be relocated, it must be an assembly-time constant")); | |
772 | return 0; | |
773 | } | |
774 | ||
775 | relP = xmalloc (sizeof (arelent)); | |
9c2799c2 | 776 | gas_assert (relP != 0); |
20135e4c NC |
777 | relP->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); |
778 | *relP->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); | |
779 | relP->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
780 | ||
781 | relP->addend = fixP->fx_offset; | |
782 | ||
783 | /* This is the standard place for KLUDGEs to work around bugs in | |
784 | bfd_install_relocation (first such note in the documentation | |
785 | appears with binutils-2.8). | |
786 | ||
787 | That function bfd_install_relocation does the wrong thing with | |
788 | putting stuff into the addend of a reloc (it should stay out) for a | |
789 | weak symbol. The really bad thing is that it adds the | |
790 | "segment-relative offset" of the symbol into the reloc. In this | |
791 | case, the reloc should instead be relative to the symbol with no | |
792 | other offset than the assembly code shows; and since the symbol is | |
793 | weak, any local definition should be ignored until link time (or | |
794 | thereafter). | |
795 | To wit: weaksym+42 should be weaksym+42 in the reloc, | |
796 | not weaksym+(offset_from_segment_of_local_weaksym_definition) | |
797 | ||
798 | To "work around" this, we subtract the segment-relative offset of | |
799 | "known" weak symbols. This evens out the extra offset. | |
800 | ||
801 | That happens for a.out but not for ELF, since for ELF, | |
802 | bfd_install_relocation uses the "special function" field of the | |
803 | howto, and does not execute the code that needs to be undone. */ | |
804 | ||
805 | if (OUTPUT_FLAVOR == bfd_target_aout_flavour | |
806 | && fixP->fx_addsy && S_IS_WEAK (fixP->fx_addsy) | |
807 | && ! bfd_is_und_section (S_GET_SEGMENT (fixP->fx_addsy))) | |
808 | { | |
809 | relP->addend -= S_GET_VALUE (fixP->fx_addsy); | |
810 | } | |
811 | ||
812 | relP->howto = bfd_reloc_type_lookup (stdoutput, code); | |
813 | if (! relP->howto) | |
814 | { | |
815 | const char *name; | |
816 | ||
817 | name = S_GET_NAME (fixP->fx_addsy); | |
818 | if (name == NULL) | |
819 | name = _("<unknown>"); | |
820 | as_fatal (_("Cannot generate relocation type for symbol %s, code %s"), | |
821 | name, bfd_get_reloc_code_name (code)); | |
822 | } | |
823 | ||
824 | return relP; | |
825 | } | |
826 | ||
827 | /* Decide from what point a pc-relative relocation is relative to, | |
828 | relative to the pc-relative fixup. Er, relatively speaking. */ | |
829 | long | |
830 | md_pcrel_from (fixS *fixP) | |
831 | { | |
832 | valueT addr = fixP->fx_where + fixP->fx_frag->fr_address; | |
833 | ||
20135e4c NC |
834 | switch (fixP->fx_r_type) |
835 | { | |
836 | case BFD_RELOC_32: | |
837 | return addr + 4; | |
f865a31d | 838 | case BFD_RELOC_MOXIE_10_PCREL: |
7078b409 AG |
839 | /* Offset is from the end of the instruction. */ |
840 | return addr + 2; | |
20135e4c NC |
841 | default: |
842 | abort (); | |
843 | return addr; | |
844 | } | |
845 | } |