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