Commit | Line | Data |
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252b5132 | 1 | /* tc-w65.c -- Assemble code for the W65816 |
93c2a809 | 2 | Copyright 1995, 1998, 2000, 2001 Free Software Foundation, Inc. |
252b5132 RH |
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 2, 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 the Free | |
18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
20 | ||
8098403c | 21 | /* Written By Steve Chamberlain <sac@cygnus.com>. */ |
252b5132 RH |
22 | |
23 | #include <stdio.h> | |
24 | #include "as.h" | |
25 | #include "bfd.h" | |
26 | #include "subsegs.h" | |
27 | #define DEFINE_TABLE | |
28 | #include "../opcodes/w65-opc.h" | |
29 | #include <ctype.h> | |
30 | ||
31 | const char comment_chars[] = "!"; | |
32 | CONST char line_separator_chars[] = ";"; | |
33 | const char line_comment_chars[] = "!#"; | |
34 | ||
35 | /* This table describes all the machine specific pseudo-ops the assembler | |
36 | has to support. The fields are: | |
8098403c | 37 | |
252b5132 RH |
38 | pseudo-op name without dot |
39 | function to call to execute this pseudo-op | |
8098403c | 40 | Integer arg to pass to the function */ |
252b5132 RH |
41 | |
42 | #define OP_BCC 0x90 | |
43 | #define OP_BCS 0xB0 | |
44 | #define OP_BEQ 0xF0 | |
45 | #define OP_BMI 0x30 | |
46 | #define OP_BNE 0xD0 | |
47 | #define OP_BPL 0x10 | |
48 | #define OP_BRA 0x80 | |
49 | #define OP_BRL 0x82 | |
50 | #define OP_BVC 0x50 | |
51 | #define OP_BVS 0x70 | |
52 | ||
53 | void s_longa (); | |
19d63e5d KH |
54 | |
55 | const pseudo_typeS md_pseudo_table[] = { | |
252b5132 RH |
56 | {"int", cons, 2}, |
57 | {"word", cons, 2}, | |
58 | {"longa", s_longa, 0}, | |
59 | {"longi", s_longa, 1}, | |
60 | {0, 0, 0} | |
61 | }; | |
62 | ||
252b5132 RH |
63 | void cons (); |
64 | void s_align_bytes (); | |
65 | ||
8098403c NC |
66 | #if 0 |
67 | int md_reloc_size; | |
68 | #endif | |
252b5132 RH |
69 | |
70 | static int relax; /* set if -relax seen */ | |
71 | ||
72 | const char EXP_CHARS[] = "eE"; | |
73 | ||
19d63e5d | 74 | /* Chars that mean this number is a floating point constant. */ |
252b5132 RH |
75 | /* As in 0f12.456 */ |
76 | /* or 0d1.2345e12 */ | |
77 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
78 | ||
19d63e5d KH |
79 | /* Opcode mnemonics */ |
80 | static struct hash_control *opcode_hash_control; | |
252b5132 RH |
81 | |
82 | int M; /* M flag */ | |
83 | int X; /* X flag */ | |
84 | ||
252b5132 RH |
85 | #define C(a,b) ENCODE_RELAX(a,b) |
86 | #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) | |
87 | ||
88 | #define GET_WHAT(x) ((x>>2)) | |
89 | ||
90 | #define BYTE_DISP 1 | |
91 | #define WORD_DISP 2 | |
92 | #define UNDEF_BYTE_DISP 0 | |
93 | #define UNDEF_WORD_DISP 3 | |
94 | ||
95 | #define COND_BRANCH 1 | |
96 | #define UNCOND_BRANCH 2 | |
97 | #define END 3 | |
98 | ||
99 | #define BYTE_F 127 /* How far we can branch forwards */ | |
100 | #define BYTE_B -126 /* How far we can branch backwards */ | |
101 | #define WORD_F 32767 | |
102 | #define WORD_B 32768 | |
103 | ||
e66457fb AM |
104 | relax_typeS md_relax_table[C (END, 0)] = { |
105 | { 0, 0, 0, 0 }, | |
106 | { 0, 0, 0, 0 }, | |
107 | { 0, 0, 0, 0 }, | |
108 | { 0, 0, 0, 0 }, | |
109 | ||
110 | /* COND_BRANCH */ | |
111 | { 0, 0, 0, 0 }, /* UNDEF_BYTE_DISP */ | |
112 | { BYTE_F, BYTE_B, 2, C (COND_BRANCH, WORD_DISP) }, /* BYTE_DISP */ | |
113 | { WORD_F, WORD_B, 5, 0 }, /* WORD_DISP */ | |
114 | { 0, 0, 5, 0 }, /* UNDEF_WORD_DISP */ | |
115 | ||
116 | /* UNCOND_BRANCH */ | |
117 | { 0, 0, 0, 0 }, /* UNDEF_BYTE_DISP */ | |
118 | { BYTE_F, BYTE_B, 2, C (UNCOND_BRANCH, WORD_DISP) }, /* BYTE_DISP */ | |
119 | { WORD_F, WORD_B, 3, 0 }, /* WORD_DISP */ | |
120 | { 0, 0, 3, 0 } /* UNDEF_WORD_DISP */ | |
121 | ||
122 | }; | |
252b5132 | 123 | |
8098403c NC |
124 | /* This function is called once, at assembler startup time. This |
125 | should set up all the tables, etc that the MD part of the assembler | |
126 | needs. */ | |
252b5132 RH |
127 | |
128 | void | |
129 | s_longa (xmode) | |
130 | { | |
131 | int *p = xmode ? &X : &M; | |
132 | while (*input_line_pointer == ' ') | |
133 | input_line_pointer++; | |
134 | if (strncmp (input_line_pointer, "on", 2) == 0) | |
135 | { | |
136 | input_line_pointer += 2; | |
137 | *p = 0; | |
138 | } | |
139 | else if (strncmp (input_line_pointer, "off", 3) == 0) | |
140 | { | |
141 | *p = 1; | |
142 | input_line_pointer += 3; | |
143 | } | |
144 | else | |
145 | as_bad (_("need on or off.")); | |
146 | demand_empty_rest_of_line (); | |
147 | } | |
8098403c | 148 | |
252b5132 RH |
149 | void |
150 | md_begin () | |
151 | { | |
252b5132 RH |
152 | struct opinfo *opcode; |
153 | char *prev_name = ""; | |
154 | ||
155 | opcode_hash_control = hash_new (); | |
156 | ||
8098403c | 157 | /* Insert unique names into hash table. */ |
252b5132 RH |
158 | for (opcode = optable; opcode->name; opcode++) |
159 | { | |
160 | if (strcmp (prev_name, opcode->name)) | |
161 | { | |
162 | prev_name = opcode->name; | |
163 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); | |
164 | } | |
165 | else | |
166 | { | |
167 | /* Make all the opcodes with the same name point to the same | |
8098403c | 168 | string. */ |
252b5132 RH |
169 | opcode->name = prev_name; |
170 | } | |
171 | } | |
172 | ||
252b5132 RH |
173 | flag_signed_overflow_ok = 1; |
174 | } | |
175 | ||
176 | static expressionS immediate; /* absolute expression */ | |
177 | static expressionS immediate1; /* absolute expression */ | |
178 | ||
252b5132 RH |
179 | static symbolS * |
180 | dot () | |
181 | { | |
182 | const char *fake; | |
183 | ||
184 | /* JF: '.' is pseudo symbol with value of current location | |
185 | in current segment. */ | |
186 | fake = FAKE_LABEL_NAME; | |
187 | return symbol_new (fake, | |
188 | now_seg, | |
189 | (valueT) frag_now_fix (), | |
190 | frag_now); | |
191 | ||
192 | } | |
193 | ||
194 | int expr_size; | |
195 | int expr_shift; | |
196 | int tc_cons_reloc; | |
8098403c | 197 | |
252b5132 RH |
198 | void |
199 | w65_expression (dest, bytes) | |
200 | expressionS *dest; | |
201 | unsigned int bytes; | |
202 | { | |
203 | expr_size = 0; | |
204 | expr_shift = 0; | |
205 | tc_cons_reloc = 0; | |
206 | while (*input_line_pointer == ' ') | |
207 | input_line_pointer++; | |
208 | ||
209 | if (*input_line_pointer == '<') | |
210 | { | |
211 | expr_size = 1; | |
212 | input_line_pointer++; | |
213 | } | |
214 | else if (*input_line_pointer == '>') | |
215 | { | |
216 | expr_shift = 1; | |
217 | input_line_pointer++; | |
218 | } | |
219 | else if (*input_line_pointer == '^') | |
220 | { | |
221 | expr_shift = 2; | |
222 | input_line_pointer++; | |
223 | } | |
224 | ||
225 | expr (0, dest); | |
226 | } | |
227 | ||
228 | int amode; | |
8098403c NC |
229 | |
230 | static char * | |
252b5132 RH |
231 | parse_exp (s, bytes) |
232 | char *s; | |
233 | int bytes; | |
234 | { | |
235 | char *save; | |
236 | char *new; | |
237 | ||
238 | save = input_line_pointer; | |
239 | input_line_pointer = s; | |
240 | w65_expression (&immediate, bytes); | |
241 | if (immediate.X_op == O_absent) | |
242 | as_bad (_("missing operand")); | |
243 | new = input_line_pointer; | |
244 | input_line_pointer = save; | |
245 | return new; | |
246 | } | |
247 | ||
8098403c | 248 | static char * |
252b5132 RH |
249 | get_operands (info, ptr) |
250 | struct opinfo *info; | |
251 | char *ptr; | |
252 | { | |
253 | register int override_len = 0; | |
254 | register int bytes = 0; | |
8098403c | 255 | |
252b5132 RH |
256 | while (*ptr == ' ') |
257 | ptr++; | |
258 | ||
259 | if (ptr[0] == '#') | |
260 | { | |
261 | ptr++; | |
262 | switch (info->amode) | |
263 | { | |
264 | case ADDR_IMMTOI: | |
265 | bytes = X ? 1 : 2; | |
266 | amode = ADDR_IMMTOI; | |
267 | break; | |
268 | case ADDR_IMMTOA: | |
269 | bytes = M ? 1 : 2; | |
270 | amode = ADDR_IMMTOA; | |
271 | break; | |
272 | case ADDR_IMMCOP: | |
273 | bytes = 1; | |
274 | amode = ADDR_IMMCOP; | |
275 | break; | |
276 | case ADDR_DIR: | |
277 | bytes = 2; | |
278 | amode = ADDR_ABS; | |
279 | break; | |
280 | default: | |
281 | abort (); | |
282 | break; | |
283 | } | |
284 | ptr = parse_exp (ptr); | |
285 | } | |
286 | else if (ptr[0] == '!') | |
287 | { | |
288 | ptr = parse_exp (ptr + 1); | |
289 | if (ptr[0] == ',') | |
290 | { | |
291 | if (ptr[1] == 'y') | |
292 | { | |
293 | amode = ADDR_ABS_IDX_Y; | |
294 | bytes = 2; | |
295 | ptr += 2; | |
296 | } | |
297 | else if (ptr[1] == 'x') | |
298 | { | |
299 | amode = ADDR_ABS_IDX_X; | |
300 | bytes = 2; | |
301 | ptr += 2; | |
302 | } | |
303 | else | |
304 | { | |
305 | as_bad (_("syntax error after <exp")); | |
306 | } | |
307 | } | |
308 | else | |
309 | { | |
310 | amode = ADDR_ABS; | |
311 | bytes = 2; | |
312 | } | |
313 | } | |
314 | else if (ptr[0] == '>') | |
315 | { | |
316 | ptr = parse_exp (ptr + 1); | |
317 | if (ptr[0] == ',' && ptr[1] == 'x') | |
318 | { | |
319 | amode = ADDR_ABS_LONG_IDX_X; | |
320 | bytes = 3; | |
321 | ptr += 2; | |
322 | } | |
323 | else | |
324 | { | |
325 | amode = ADDR_ABS_LONG; | |
326 | bytes = 3; | |
327 | } | |
328 | } | |
329 | else if (ptr[0] == '<') | |
330 | { | |
331 | ptr = parse_exp (ptr + 1); | |
332 | if (ptr[0] == ',') | |
333 | { | |
334 | if (ptr[1] == 'y') | |
335 | { | |
336 | amode = ADDR_DIR_IDX_Y; | |
337 | ptr += 2; | |
338 | bytes = 2; | |
339 | } | |
340 | else if (ptr[1] == 'x') | |
341 | { | |
342 | amode = ADDR_DIR_IDX_X; | |
343 | ptr += 2; | |
344 | bytes = 2; | |
345 | } | |
346 | else | |
347 | { | |
348 | as_bad (_("syntax error after <exp")); | |
349 | } | |
350 | } | |
351 | else | |
352 | { | |
353 | amode = ADDR_DIR; | |
354 | bytes = 1; | |
355 | } | |
356 | } | |
357 | else if (ptr[0] == 'a') | |
358 | { | |
359 | amode = ADDR_ACC; | |
360 | } | |
361 | else if (ptr[0] == '(') | |
362 | { | |
363 | /* Look for (exp),y | |
364 | (<exp),y | |
365 | (exp,x) | |
366 | (<exp,x) | |
367 | (exp) | |
368 | (!exp) | |
369 | (exp) | |
370 | (<exp) | |
371 | (exp,x) | |
372 | (!exp,x) | |
373 | (exp,s) | |
374 | (exp,s),y */ | |
375 | ||
376 | ptr++; | |
377 | if (ptr[0] == '<') | |
378 | { | |
379 | override_len = 1; | |
380 | ptr++; | |
381 | } | |
382 | else if (ptr[0] == '!') | |
383 | { | |
384 | override_len = 2; | |
385 | ptr++; | |
386 | } | |
387 | else if (ptr[0] == '>') | |
388 | { | |
389 | override_len = 3; | |
390 | ptr++; | |
391 | } | |
392 | else | |
393 | { | |
394 | override_len = 0; | |
395 | } | |
396 | ptr = parse_exp (ptr); | |
397 | ||
398 | if (ptr[0] == ',') | |
399 | { | |
400 | ptr++; | |
401 | if (ptr[0] == 'x' && ptr[1] == ')') | |
402 | { | |
403 | ptr += 2; | |
404 | ||
405 | if (override_len == 1) | |
406 | { | |
407 | amode = ADDR_DIR_IDX_IND_X; | |
408 | bytes = 2; | |
409 | } | |
410 | else | |
411 | { | |
412 | amode = ADDR_ABS_IND_IDX; | |
413 | bytes = 2; | |
414 | } | |
415 | } | |
8098403c NC |
416 | else if (ptr[0] == 's' && ptr[1] == ')' |
417 | && ptr[2] == ',' && ptr[3] == 'y') | |
252b5132 RH |
418 | { |
419 | amode = ADDR_STACK_REL_INDX_IDX; | |
420 | bytes = 1; | |
421 | ptr += 4; | |
422 | } | |
423 | } | |
424 | else if (ptr[0] == ')') | |
425 | { | |
426 | if (ptr[1] == ',' && ptr[2] == 'y') | |
427 | { | |
428 | amode = ADDR_DIR_IND_IDX_Y; | |
429 | ptr += 3; | |
430 | bytes = 2; | |
431 | } | |
432 | else | |
433 | { | |
434 | if (override_len == 1) | |
435 | { | |
436 | amode = ADDR_DIR_IND; | |
437 | bytes = 1; | |
438 | } | |
439 | else | |
440 | { | |
441 | amode = ADDR_ABS_IND; | |
442 | bytes = 2; | |
443 | } | |
444 | ptr++; | |
445 | ||
446 | } | |
447 | } | |
252b5132 RH |
448 | } |
449 | else if (ptr[0] == '[') | |
450 | { | |
451 | ptr = parse_exp (ptr + 1); | |
452 | if (ptr[0] == ']') | |
453 | { | |
454 | ptr++; | |
455 | if (ptr[0] == ',' && ptr[1] == 'y') | |
456 | { | |
457 | bytes = 1; | |
458 | amode = ADDR_DIR_IND_IDX_Y_LONG; | |
459 | ptr += 2; | |
460 | } | |
461 | else | |
462 | { | |
8098403c | 463 | if (info->code == O_jmp) |
252b5132 | 464 | { |
8098403c NC |
465 | bytes = 2; |
466 | amode = ADDR_ABS_IND_LONG; | |
467 | } | |
468 | else | |
469 | { | |
470 | bytes = 1; | |
471 | amode = ADDR_DIR_IND_LONG; | |
472 | } | |
252b5132 RH |
473 | } |
474 | } | |
475 | } | |
476 | else | |
477 | { | |
478 | ptr = parse_exp (ptr, 2); | |
479 | if (ptr[0] == ',') | |
480 | { | |
481 | if (ptr[1] == 'y') | |
482 | { | |
483 | if (override_len == 1) | |
484 | { | |
485 | bytes = 1; | |
486 | amode = ADDR_DIR_IDX_Y; | |
487 | } | |
488 | else | |
489 | { | |
490 | amode = ADDR_ABS_IDX_Y; | |
491 | bytes = 2; | |
492 | } | |
493 | ptr += 2; | |
494 | } | |
495 | else if (ptr[1] == 'x') | |
496 | { | |
497 | if (override_len == 1) | |
498 | { | |
499 | amode = ADDR_DIR_IDX_X; | |
500 | bytes = 1; | |
501 | } | |
502 | else | |
503 | { | |
504 | amode = ADDR_ABS_IDX_X; | |
505 | bytes = 2; | |
506 | } | |
507 | ptr += 2; | |
508 | } | |
509 | else if (ptr[1] == 's') | |
510 | { | |
511 | bytes = 1; | |
512 | amode = ADDR_STACK_REL; | |
513 | ptr += 2; | |
514 | } | |
515 | else | |
516 | { | |
517 | bytes = 1; | |
518 | immediate1 = immediate; | |
519 | ptr = parse_exp (ptr + 1); | |
520 | amode = ADDR_BLOCK_MOVE; | |
521 | } | |
522 | } | |
523 | else | |
524 | { | |
525 | switch (info->amode) | |
526 | { | |
527 | case ADDR_PC_REL: | |
528 | amode = ADDR_PC_REL; | |
529 | bytes = 1; | |
530 | break; | |
531 | case ADDR_PC_REL_LONG: | |
532 | amode = ADDR_PC_REL_LONG; | |
533 | bytes = 2; | |
534 | break; | |
535 | default: | |
536 | if (override_len == 1) | |
537 | { | |
538 | amode = ADDR_DIR; | |
539 | bytes = 1; | |
540 | } | |
541 | else if (override_len == 3) | |
542 | { | |
543 | bytes = 3; | |
544 | amode = ADDR_ABS_LONG; | |
545 | } | |
546 | else | |
547 | { | |
548 | amode = ADDR_ABS; | |
549 | bytes = 2; | |
550 | } | |
551 | } | |
552 | } | |
553 | } | |
554 | ||
555 | switch (bytes) | |
556 | { | |
557 | case 1: | |
558 | switch (expr_shift) | |
559 | { | |
560 | case 0: | |
561 | if (amode == ADDR_DIR) | |
8098403c | 562 | tc_cons_reloc = R_W65_DP; |
252b5132 | 563 | else |
8098403c | 564 | tc_cons_reloc = R_W65_ABS8; |
252b5132 RH |
565 | break; |
566 | case 1: | |
567 | tc_cons_reloc = R_W65_ABS8S8; | |
568 | break; | |
569 | case 2: | |
570 | tc_cons_reloc = R_W65_ABS8S16; | |
571 | break; | |
572 | } | |
573 | break; | |
574 | case 2: | |
575 | switch (expr_shift) | |
576 | { | |
577 | case 0: | |
578 | tc_cons_reloc = R_W65_ABS16; | |
579 | break; | |
580 | case 1: | |
581 | tc_cons_reloc = R_W65_ABS16S8; | |
582 | break; | |
583 | case 2: | |
584 | tc_cons_reloc = R_W65_ABS16S16; | |
585 | break; | |
586 | } | |
587 | } | |
588 | return ptr; | |
589 | } | |
590 | ||
591 | /* Passed a pointer to a list of opcodes which use different | |
592 | addressing modes, return the opcode which matches the opcodes | |
8098403c | 593 | provided. */ |
252b5132 | 594 | |
8098403c | 595 | static struct opinfo * |
252b5132 RH |
596 | get_specific (opcode) |
597 | struct opinfo *opcode; | |
598 | { | |
599 | int ocode = opcode->code; | |
600 | ||
601 | for (; opcode->code == ocode; opcode++) | |
602 | { | |
603 | if (opcode->amode == amode) | |
604 | return opcode; | |
605 | } | |
606 | return 0; | |
607 | } | |
608 | ||
609 | int | |
610 | check (operand, low, high) | |
611 | expressionS *operand; | |
612 | int low; | |
613 | int high; | |
614 | { | |
615 | if (operand->X_op != O_constant | |
616 | || operand->X_add_number < low | |
617 | || operand->X_add_number > high) | |
618 | { | |
619 | as_bad ("operand must be absolute in range %d..%d", low, high); | |
620 | } | |
621 | return operand->X_add_number; | |
622 | } | |
623 | ||
8098403c | 624 | static int log2[] = { 0, 0, 1, 0, 2 }; |
252b5132 | 625 | |
1994a7c7 | 626 | /* Now we know what sort of opcodes it is, let's build the bytes. */ |
8098403c | 627 | |
252b5132 RH |
628 | static void |
629 | build_Mytes (opcode) | |
630 | struct opinfo *opcode; | |
631 | { | |
632 | int size; | |
633 | int type; | |
634 | int pcrel; | |
635 | char *output; | |
636 | ||
637 | if (opcode->amode == ADDR_IMPLIED) | |
638 | { | |
639 | output = frag_more (1); | |
640 | } | |
641 | else if (opcode->amode == ADDR_PC_REL) | |
642 | { | |
643 | int type; | |
8098403c NC |
644 | |
645 | /* This is a relaxable insn, so we do some special handling. */ | |
252b5132 RH |
646 | type = opcode->val == OP_BRA ? UNCOND_BRANCH : COND_BRANCH; |
647 | output = frag_var (rs_machine_dependent, | |
648 | md_relax_table[C (type, WORD_DISP)].rlx_length, | |
649 | md_relax_table[C (type, BYTE_DISP)].rlx_length, | |
650 | C (type, UNDEF_BYTE_DISP), | |
651 | immediate.X_add_symbol, | |
652 | immediate.X_add_number, | |
653 | 0); | |
654 | } | |
655 | else | |
656 | { | |
657 | switch (opcode->amode) | |
658 | { | |
659 | GETINFO (size, type, pcrel); | |
660 | } | |
661 | ||
8098403c NC |
662 | /* If something special was done in the expression modify the |
663 | reloc type. */ | |
252b5132 | 664 | if (tc_cons_reloc) |
8098403c | 665 | type = tc_cons_reloc; |
252b5132 | 666 | |
8098403c | 667 | /* 1 byte for the opcode + the bytes for the addrmode. */ |
252b5132 RH |
668 | output = frag_more (size + 1); |
669 | ||
670 | if (opcode->amode == ADDR_BLOCK_MOVE) | |
671 | { | |
8098403c | 672 | /* Two relocs for this one. */ |
252b5132 RH |
673 | fix_new_exp (frag_now, |
674 | output + 1 - frag_now->fr_literal, | |
675 | 1, | |
676 | &immediate, | |
677 | 0, | |
678 | R_W65_ABS8S16); | |
679 | ||
680 | fix_new_exp (frag_now, | |
681 | output + 2 - frag_now->fr_literal, | |
682 | 1, | |
683 | &immediate1, | |
684 | 0, | |
685 | R_W65_ABS8S16); | |
686 | } | |
687 | else if (type >= 0 | |
688 | && opcode->amode != ADDR_IMPLIED | |
689 | && opcode->amode != ADDR_ACC | |
690 | && opcode->amode != ADDR_STACK) | |
691 | { | |
692 | fix_new_exp (frag_now, | |
693 | output + 1 - frag_now->fr_literal, | |
694 | size, | |
695 | &immediate, | |
696 | pcrel, | |
697 | type); | |
698 | } | |
699 | } | |
700 | output[0] = opcode->val; | |
701 | } | |
702 | ||
8098403c NC |
703 | /* This is the guts of the machine-dependent assembler. STR points to |
704 | a machine dependent instruction. This function is supposed to emit | |
705 | the frags/bytes it assembles to. */ | |
252b5132 RH |
706 | |
707 | void | |
708 | md_assemble (str) | |
709 | char *str; | |
710 | { | |
711 | unsigned char *op_start; | |
712 | unsigned char *op_end; | |
713 | struct opinfo *opcode; | |
714 | char name[20]; | |
715 | int nlen = 0; | |
716 | char *p; | |
717 | ||
718 | /* Drop leading whitespace */ | |
719 | while (*str == ' ') | |
720 | str++; | |
721 | ||
722 | /* all opcodes are three letters */ | |
723 | name[0] = str[0]; | |
724 | name[1] = str[1]; | |
725 | name[2] = str[2]; | |
726 | name[3] = 0; | |
727 | ||
728 | tc_cons_reloc = 0; | |
729 | str += 3; | |
730 | opcode = (struct opinfo *) hash_find (opcode_hash_control, name); | |
731 | ||
732 | if (opcode == NULL) | |
733 | { | |
734 | as_bad (_("unknown opcode")); | |
735 | return; | |
736 | } | |
737 | ||
738 | if (opcode->amode != ADDR_IMPLIED | |
739 | && opcode->amode != ADDR_STACK) | |
740 | { | |
741 | get_operands (opcode, str); | |
742 | opcode = get_specific (opcode); | |
743 | } | |
744 | ||
745 | if (opcode == 0) | |
746 | { | |
8098403c | 747 | /* Couldn't find an opcode which matched the operands. */ |
252b5132 RH |
748 | |
749 | char *where = frag_more (1); | |
750 | ||
751 | where[0] = 0x0; | |
752 | where[1] = 0x0; | |
753 | as_bad (_("invalid operands for opcode")); | |
754 | return; | |
755 | } | |
756 | ||
757 | build_Mytes (opcode); | |
758 | } | |
759 | ||
252b5132 | 760 | void |
c0fecd35 AM |
761 | tc_crawl_symbol_chain (headers) |
762 | object_headers *headers; | |
252b5132 RH |
763 | { |
764 | printf (_("call to tc_crawl_symbol_chain \n")); | |
765 | } | |
766 | ||
767 | symbolS * | |
c0fecd35 AM |
768 | md_undefined_symbol (name) |
769 | char *name; | |
252b5132 RH |
770 | { |
771 | return 0; | |
772 | } | |
773 | ||
774 | void | |
c0fecd35 AM |
775 | tc_headers_hook (headers) |
776 | object_headers *headers; | |
252b5132 RH |
777 | { |
778 | printf (_("call to tc_headers_hook \n")); | |
779 | } | |
780 | ||
8098403c NC |
781 | /* Various routines to kill one day. */ |
782 | /* Equal to MAX_PRECISION in atof-ieee.c. */ | |
252b5132 RH |
783 | #define MAX_LITTLENUMS 6 |
784 | ||
8098403c NC |
785 | /* Turn a string in input_line_pointer into a floating point constant |
786 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
787 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
788 | returned, or NULL on OK. */ | |
789 | ||
252b5132 RH |
790 | char * |
791 | md_atof (type, litP, sizeP) | |
792 | char type; | |
793 | char *litP; | |
794 | int *sizeP; | |
795 | { | |
796 | int prec; | |
797 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
798 | LITTLENUM_TYPE *wordP; | |
799 | char *t; | |
800 | char *atof_ieee (); | |
801 | ||
802 | switch (type) | |
803 | { | |
804 | case 'f': | |
805 | case 'F': | |
806 | case 's': | |
807 | case 'S': | |
808 | prec = 2; | |
809 | break; | |
810 | ||
811 | case 'd': | |
812 | case 'D': | |
813 | case 'r': | |
814 | case 'R': | |
815 | prec = 4; | |
816 | break; | |
817 | ||
818 | case 'x': | |
819 | case 'X': | |
820 | prec = 6; | |
821 | break; | |
822 | ||
823 | case 'p': | |
824 | case 'P': | |
825 | prec = 6; | |
826 | break; | |
827 | ||
828 | default: | |
829 | *sizeP = 0; | |
830 | return _("Bad call to MD_NTOF()"); | |
831 | } | |
832 | t = atof_ieee (input_line_pointer, type, words); | |
833 | if (t) | |
834 | input_line_pointer = t; | |
835 | ||
836 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
837 | for (wordP = words + prec - 1; prec--;) | |
838 | { | |
839 | md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); | |
840 | litP += sizeof (LITTLENUM_TYPE); | |
841 | } | |
842 | return 0; | |
843 | } | |
844 | ||
845 | int | |
8098403c NC |
846 | md_parse_option (c, a) |
847 | int c; | |
848 | char *a; | |
252b5132 RH |
849 | { |
850 | return 1; | |
851 | } | |
852 | ||
853 | void | |
854 | tc_Nout_fix_to_chars () | |
855 | { | |
856 | printf (_("call to tc_Nout_fix_to_chars \n")); | |
857 | abort (); | |
858 | } | |
859 | ||
8098403c NC |
860 | /* Called after relaxing, change the frags so they know how big they |
861 | are. */ | |
862 | ||
252b5132 RH |
863 | void |
864 | md_convert_frag (headers, seg, fragP) | |
865 | object_headers *headers; | |
866 | segT seg; | |
867 | fragS *fragP; | |
868 | { | |
869 | int disp_size = 0; | |
870 | int inst_size = 0; | |
8098403c NC |
871 | unsigned char *buffer = |
872 | (unsigned char *) (fragP->fr_fix + fragP->fr_literal); | |
252b5132 RH |
873 | |
874 | switch (fragP->fr_subtype) | |
875 | { | |
876 | case C (COND_BRANCH, BYTE_DISP): | |
877 | case C (UNCOND_BRANCH, BYTE_DISP): | |
878 | disp_size = 1; | |
879 | inst_size = 1; | |
880 | break; | |
881 | ||
8098403c | 882 | /* Conditional branches to a known 16 bit displacement. */ |
252b5132 RH |
883 | case C (COND_BRANCH, WORD_DISP): |
884 | switch (buffer[0]) | |
885 | { | |
886 | case OP_BCC: | |
887 | case OP_BCS: | |
888 | case OP_BEQ: | |
889 | case OP_BMI: | |
890 | case OP_BNE: | |
891 | case OP_BPL: | |
892 | case OP_BVS: | |
893 | case OP_BVC: | |
894 | /* Invert the sense of the test */ | |
895 | buffer[0] ^= 0x20; | |
896 | buffer[1] = 3; /* Jump over following brl */ | |
897 | buffer[2] = OP_BRL; | |
898 | buffer[3] = 0; | |
899 | buffer[4] = 0; | |
900 | disp_size = 2; | |
901 | inst_size = 3; | |
902 | break; | |
903 | default: | |
904 | abort (); | |
905 | } | |
906 | break; | |
907 | case C (UNCOND_BRANCH, WORD_DISP): | |
8098403c | 908 | /* Unconditional branches to a known 16 bit displacement. */ |
252b5132 RH |
909 | |
910 | switch (buffer[0]) | |
911 | { | |
912 | case OP_BRA: | |
913 | buffer[0] = OP_BRL; | |
914 | disp_size = 2; | |
915 | inst_size = 1; | |
916 | break; | |
917 | default: | |
918 | abort (); | |
919 | } | |
920 | break; | |
8098403c | 921 | /* Got to create a branch over a reloc here. */ |
252b5132 RH |
922 | case C (COND_BRANCH, UNDEF_WORD_DISP): |
923 | buffer[0] ^= 0x20; /* invert test */ | |
924 | buffer[1] = 3; | |
925 | buffer[2] = OP_BRL; | |
926 | buffer[3] = 0; | |
927 | buffer[4] = 0; | |
928 | fix_new (fragP, | |
929 | fragP->fr_fix + 3, | |
930 | 4, | |
931 | fragP->fr_symbol, | |
932 | fragP->fr_offset, | |
933 | 0, | |
934 | R_W65_PCR16); | |
935 | ||
936 | fragP->fr_fix += disp_size + inst_size; | |
937 | fragP->fr_var = 0; | |
938 | break; | |
939 | case C (UNCOND_BRANCH, UNDEF_WORD_DISP): | |
940 | buffer[0] = OP_BRL; | |
941 | buffer[1] = 0; | |
942 | buffer[2] = 0; | |
943 | fix_new (fragP, | |
944 | fragP->fr_fix + 1, | |
945 | 4, | |
946 | fragP->fr_symbol, | |
947 | fragP->fr_offset, | |
948 | 0, | |
949 | R_W65_PCR16); | |
950 | ||
951 | fragP->fr_fix += disp_size + inst_size; | |
952 | fragP->fr_var = 0; | |
953 | break; | |
954 | default: | |
955 | abort (); | |
956 | } | |
957 | if (inst_size) | |
958 | { | |
8098403c NC |
959 | /* Get the address of the end of the instruction. */ |
960 | int next_inst = (fragP->fr_fix + fragP->fr_address | |
961 | + disp_size + inst_size); | |
252b5132 RH |
962 | int targ_addr = (S_GET_VALUE (fragP->fr_symbol) + |
963 | fragP->fr_offset); | |
964 | int disp = targ_addr - next_inst; | |
965 | ||
966 | md_number_to_chars (buffer + inst_size, disp, disp_size); | |
967 | fragP->fr_fix += disp_size + inst_size; | |
968 | fragP->fr_var = 0; | |
969 | } | |
970 | } | |
971 | ||
252b5132 | 972 | valueT |
c0fecd35 AM |
973 | md_section_align (seg, size) |
974 | segT seg; | |
975 | valueT size; | |
252b5132 RH |
976 | { |
977 | return ((size + (1 << section_alignment[(int) seg]) - 1) | |
978 | & (-1 << section_alignment[(int) seg])); | |
252b5132 RH |
979 | } |
980 | ||
981 | void | |
982 | md_apply_fix (fixP, val) | |
983 | fixS *fixP; | |
984 | long val; | |
985 | { | |
986 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
987 | int addr = fixP->fx_frag->fr_address + fixP->fx_where; | |
988 | ||
989 | if (fixP->fx_r_type == 0) | |
990 | { | |
991 | if (fixP->fx_size == 1) | |
992 | fixP->fx_r_type = R_W65_ABS8; | |
993 | else | |
994 | fixP->fx_r_type = R_W65_ABS16; | |
995 | } | |
996 | ||
997 | switch (fixP->fx_r_type) | |
998 | { | |
999 | case R_W65_ABS8S16: | |
1000 | val >>= 8; | |
1001 | case R_W65_ABS8S8: | |
1002 | val >>= 8; | |
1003 | case R_W65_ABS8: | |
1004 | *buf++ = val; | |
1005 | break; | |
1006 | case R_W65_ABS16S16: | |
1007 | val >>= 8; | |
1008 | case R_W65_ABS16S8: | |
1009 | val >>= 8; | |
1010 | case R_W65_ABS16: | |
1011 | *buf++ = val >> 0; | |
1012 | *buf++ = val >> 8; | |
1013 | break; | |
1014 | case R_W65_ABS24: | |
1015 | *buf++ = val >> 0; | |
1016 | *buf++ = val >> 8; | |
1017 | *buf++ = val >> 16; | |
1018 | break; | |
1019 | case R_W65_PCR8: | |
1020 | *buf++ = val - addr - 1; | |
1021 | break; | |
1022 | case R_W65_PCR16: | |
1023 | val = val - addr - 1; | |
1024 | *buf++ = val; | |
1025 | *buf++ = val >> 8; | |
1026 | break; | |
1027 | case R_W65_DP: | |
1028 | *buf++ = val; | |
1029 | break; | |
1030 | ||
1031 | default: | |
1032 | abort (); | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | /* Put number into target byte order */ | |
1037 | ||
1038 | void | |
1039 | md_number_to_chars (ptr, use, nbytes) | |
1040 | char *ptr; | |
1041 | valueT use; | |
1042 | int nbytes; | |
1043 | { | |
1044 | number_to_chars_littleendian (ptr, use, nbytes); | |
1045 | } | |
1046 | ||
1047 | long | |
1048 | md_pcrel_from (fixP) | |
1049 | fixS *fixP; | |
1050 | { | |
1051 | int gap = fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address - 1; | |
1052 | return gap; | |
1053 | } | |
1054 | ||
1055 | void | |
1056 | tc_coff_symbol_emit_hook (x) | |
8098403c | 1057 | symbolS *x; |
252b5132 RH |
1058 | { |
1059 | } | |
1060 | ||
1061 | short | |
1062 | tc_coff_fix2rtype (fix_ptr) | |
1063 | fixS *fix_ptr; | |
1064 | { | |
1065 | return fix_ptr->fx_r_type; | |
1066 | } | |
1067 | ||
1068 | void | |
1069 | tc_reloc_mangle (fix_ptr, intr, base) | |
1070 | fixS *fix_ptr; | |
1071 | struct internal_reloc *intr; | |
1072 | bfd_vma base; | |
1073 | ||
1074 | { | |
1075 | symbolS *symbol_ptr; | |
1076 | ||
1077 | symbol_ptr = fix_ptr->fx_addsy; | |
1078 | ||
1079 | /* If this relocation is attached to a symbol then it's ok | |
1080 | to output it */ | |
1081 | if (fix_ptr->fx_r_type == RELOC_32) | |
1082 | { | |
1083 | /* cons likes to create reloc32's whatever the size of the reloc.. | |
1084 | */ | |
1085 | switch (fix_ptr->fx_size) | |
1086 | { | |
1087 | case 2: | |
1088 | intr->r_type = R_IMM16; | |
1089 | break; | |
1090 | case 1: | |
1091 | intr->r_type = R_IMM8; | |
1092 | break; | |
1093 | default: | |
1094 | abort (); | |
1095 | } | |
1096 | } | |
1097 | else | |
1098 | { | |
1099 | if (fix_ptr->fx_size == 4) | |
1100 | intr->r_type = R_W65_ABS24; | |
1101 | else | |
1102 | intr->r_type = fix_ptr->fx_r_type; | |
1103 | } | |
1104 | ||
1105 | intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base; | |
1106 | intr->r_offset = fix_ptr->fx_offset; | |
1107 | ||
1108 | /* Turn the segment of the symbol into an offset. */ | |
1109 | if (symbol_ptr) | |
1110 | { | |
1111 | symbolS *dot; | |
1112 | ||
1113 | dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot; | |
1114 | if (dot) | |
1115 | { | |
1116 | intr->r_offset += S_GET_VALUE (symbol_ptr); | |
1117 | intr->r_symndx = dot->sy_number; | |
1118 | } | |
1119 | else | |
1120 | { | |
1121 | intr->r_symndx = symbol_ptr->sy_number; | |
1122 | } | |
1123 | } | |
1124 | else | |
1125 | { | |
1126 | intr->r_symndx = -1; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | int | |
1131 | tc_coff_sizemachdep (frag) | |
1132 | fragS *frag; | |
1133 | { | |
1134 | return md_relax_table[frag->fr_subtype].rlx_length; | |
1135 | } | |
1136 | ||
8098403c NC |
1137 | /* Called just before address relaxation, return the length by which a |
1138 | fragment must grow to reach it's destination. */ | |
252b5132 | 1139 | |
252b5132 RH |
1140 | int |
1141 | md_estimate_size_before_relax (fragP, segment_type) | |
1142 | register fragS *fragP; | |
1143 | register segT segment_type; | |
1144 | { | |
e66457fb | 1145 | int what; |
252b5132 RH |
1146 | |
1147 | switch (fragP->fr_subtype) | |
1148 | { | |
1149 | default: | |
1150 | abort (); | |
93c2a809 | 1151 | |
252b5132 RH |
1152 | case C (COND_BRANCH, UNDEF_BYTE_DISP): |
1153 | case C (UNCOND_BRANCH, UNDEF_BYTE_DISP): | |
e66457fb | 1154 | what = GET_WHAT (fragP->fr_subtype); |
8098403c | 1155 | /* Used to be a branch to somewhere which was unknown. */ |
252b5132 RH |
1156 | if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type) |
1157 | { | |
1158 | /* Got a symbol and it's defined in this segment, become byte | |
8098403c | 1159 | sized - maybe it will fix up. */ |
252b5132 | 1160 | fragP->fr_subtype = C (what, BYTE_DISP); |
252b5132 RH |
1161 | } |
1162 | else | |
1163 | { | |
8098403c NC |
1164 | /* Its got a segment, but its not ours, so it will always be |
1165 | long. */ | |
252b5132 | 1166 | fragP->fr_subtype = C (what, UNDEF_WORD_DISP); |
252b5132 | 1167 | } |
93c2a809 AM |
1168 | break; |
1169 | ||
1170 | case C (COND_BRANCH, BYTE_DISP): | |
1171 | case C (COND_BRANCH, WORD_DISP): | |
e66457fb | 1172 | case C (COND_BRANCH, UNDEF_WORD_DISP): |
93c2a809 AM |
1173 | case C (UNCOND_BRANCH, BYTE_DISP): |
1174 | case C (UNCOND_BRANCH, WORD_DISP): | |
e66457fb | 1175 | case C (UNCOND_BRANCH, UNDEF_WORD_DISP): |
93c2a809 | 1176 | /* When relaxing a section for the second time, we don't need to |
e66457fb | 1177 | do anything besides return the current size. */ |
93c2a809 | 1178 | break; |
252b5132 | 1179 | } |
e66457fb AM |
1180 | |
1181 | fragP->fr_var = md_relax_table[fragP->fr_subtype].rlx_length; | |
252b5132 RH |
1182 | return fragP->fr_var; |
1183 | } | |
1184 | ||
252b5132 RH |
1185 | CONST char *md_shortopts = ""; |
1186 | struct option md_longopts[] = { | |
1187 | #define OPTION_RELAX (OPTION_MD_BASE) | |
1188 | {NULL, no_argument, NULL, 0} | |
1189 | }; | |
1190 | ||
1191 | void | |
1192 | md_show_usage (stream) | |
1193 | FILE *stream; | |
1194 | { | |
252b5132 RH |
1195 | } |
1196 | ||
8098403c | 1197 | size_t md_longopts_size = sizeof (md_longopts); |