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2469cfa2 NC |
1 | /* tc-msp430.c -- Assembler code for the Texas Instruments MSP430 |
2 | ||
df25fda5 | 3 | Copyright (C) 2002, 2003 Free Software Foundation, Inc. |
2469cfa2 NC |
4 | Contributed by Dmitry Diky <diwil@mail.ru> |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include <stdio.h> | |
24 | #include <string.h> | |
25 | #include <stdlib.h> | |
26 | #include <limits.h> | |
27 | ||
28 | #define PUSH_1X_WORKAROUND | |
29 | #include "as.h" | |
30 | #include "subsegs.h" | |
31 | #include "opcode/msp430.h" | |
32 | #include "safe-ctype.h" | |
33 | ||
34 | const char comment_chars[] = ";"; | |
35 | const char line_comment_chars[] = "#"; | |
36 | const char line_separator_chars[] = ""; | |
37 | const char EXP_CHARS[] = "eE"; | |
38 | const char FLT_CHARS[] = "dD"; | |
39 | ||
40 | /* Handle long expressions. */ | |
41 | extern LITTLENUM_TYPE generic_bignum[]; | |
42 | ||
43 | static struct hash_control *msp430_hash; | |
44 | ||
45 | static unsigned int msp430_operands | |
46 | PARAMS ((struct msp430_opcode_s *, char *)); | |
47 | static int msp430_srcoperand | |
48 | PARAMS ((struct msp430_operand_s *, char *, int, int *)); | |
49 | static int msp430_dstoperand | |
50 | PARAMS ((struct msp430_operand_s *, char *, int)); | |
51 | static char *parse_exp | |
52 | PARAMS ((char *, expressionS *)); | |
53 | static inline char *skip_space | |
54 | PARAMS ((char *)); | |
55 | static int check_reg | |
56 | PARAMS ((char *)); | |
57 | static void msp430_set_arch | |
58 | PARAMS ((int)); | |
59 | static void show_mcu_list | |
60 | PARAMS ((FILE *)); | |
61 | static void del_spaces | |
62 | PARAMS ((char *)); | |
63 | ||
64 | #define MAX_OP_LEN 64 | |
65 | ||
66 | struct mcu_type_s | |
67 | { | |
68 | char *name; | |
69 | int isa; | |
70 | int mach; | |
71 | }; | |
72 | ||
73 | #define MSP430_ISA_11 11 | |
74 | #define MSP430_ISA_12 12 | |
75 | #define MSP430_ISA_13 13 | |
76 | #define MSP430_ISA_14 14 | |
77 | #define MSP430_ISA_41 41 | |
78 | #define MSP430_ISA_31 31 | |
79 | #define MSP430_ISA_32 32 | |
80 | #define MSP430_ISA_33 33 | |
81 | #define MSP430_ISA_110 110 | |
82 | #define MSP430_ISA_43 43 | |
83 | #define MSP430_ISA_44 44 | |
84 | #define MSP430_ISA_15 15 | |
85 | #define MSP430_ISA_16 16 | |
86 | ||
87 | #define CHECK_RELOC_MSP430 ((imm_op || byte_op)?BFD_RELOC_MSP430_16_BYTE:BFD_RELOC_MSP430_16) | |
88 | #define CHECK_RELOC_MSP430_PCREL ((imm_op || byte_op)?BFD_RELOC_MSP430_16_PCREL_BYTE:BFD_RELOC_MSP430_16_PCREL) | |
89 | ||
90 | static struct mcu_type_s mcu_types[] = | |
91 | { | |
92 | {"msp1", MSP430_ISA_11, bfd_mach_msp11}, | |
93 | {"msp2", MSP430_ISA_14, bfd_mach_msp14}, | |
94 | {"msp430x110", MSP430_ISA_11, bfd_mach_msp11}, | |
95 | {"msp430x112", MSP430_ISA_11, bfd_mach_msp11}, | |
96 | {"msp430x122", MSP430_ISA_12, bfd_mach_msp12}, | |
97 | {"msp430x122", MSP430_ISA_12, bfd_mach_msp12}, | |
98 | {"msp430x1222",MSP430_ISA_12, bfd_mach_msp12}, | |
11d78a89 NC |
99 | {"msp430x1122",MSP430_ISA_11, bfd_mach_msp110}, |
100 | {"msp430x1132",MSP430_ISA_11, bfd_mach_msp110}, | |
2469cfa2 NC |
101 | {"msp430x123", MSP430_ISA_12, bfd_mach_msp12}, |
102 | {"msp430x1232",MSP430_ISA_12, bfd_mach_msp12}, | |
103 | {"msp430x133", MSP430_ISA_13, bfd_mach_msp13}, | |
104 | {"msp430x135", MSP430_ISA_13, bfd_mach_msp13}, | |
105 | {"msp430x147", MSP430_ISA_14, bfd_mach_msp14}, | |
106 | {"msp430x148", MSP430_ISA_14, bfd_mach_msp14}, | |
107 | {"msp430x149", MSP430_ISA_14, bfd_mach_msp14}, | |
108 | {"msp430x412", MSP430_ISA_41, bfd_mach_msp41}, | |
109 | {"msp430x413", MSP430_ISA_41, bfd_mach_msp41}, | |
110 | {"msp430x311", MSP430_ISA_31, bfd_mach_msp31}, | |
111 | {"msp430x312", MSP430_ISA_31, bfd_mach_msp31}, | |
112 | {"msp430x313", MSP430_ISA_31, bfd_mach_msp31}, | |
113 | {"msp430x314", MSP430_ISA_31, bfd_mach_msp31}, | |
114 | {"msp430x315", MSP430_ISA_31, bfd_mach_msp31}, | |
115 | {"msp430x323", MSP430_ISA_32, bfd_mach_msp32}, | |
116 | {"msp430x325", MSP430_ISA_32, bfd_mach_msp32}, | |
117 | {"msp430x336", MSP430_ISA_33, bfd_mach_msp33}, | |
118 | {"msp430x337", MSP430_ISA_33, bfd_mach_msp33}, | |
119 | {"msp430x1101",MSP430_ISA_110, bfd_mach_msp110}, | |
120 | {"msp430x1111",MSP430_ISA_110, bfd_mach_msp110}, | |
121 | {"msp430x1121",MSP430_ISA_110, bfd_mach_msp110}, | |
122 | {"msp430x1331",MSP430_ISA_13, bfd_mach_msp13}, | |
123 | {"msp430x1351",MSP430_ISA_13, bfd_mach_msp13}, | |
124 | {"msp430x435", MSP430_ISA_43, bfd_mach_msp43}, | |
125 | {"msp430x436", MSP430_ISA_43, bfd_mach_msp43}, | |
11d78a89 | 126 | {"msp430x437", MSP430_ISA_43, bfd_mach_msp43}, |
2469cfa2 NC |
127 | {"msp430x447", MSP430_ISA_44, bfd_mach_msp44}, |
128 | {"msp430x448", MSP430_ISA_44, bfd_mach_msp44}, | |
129 | {"msp430x449", MSP430_ISA_44, bfd_mach_msp44}, | |
130 | {"msp430x167", MSP430_ISA_16, bfd_mach_msp16}, | |
131 | {"msp430x168", MSP430_ISA_16, bfd_mach_msp16}, | |
132 | {"msp430x169", MSP430_ISA_16, bfd_mach_msp16}, | |
133 | {"msp430x155", MSP430_ISA_15, bfd_mach_msp15}, | |
134 | {"msp430x156", MSP430_ISA_15, bfd_mach_msp15}, | |
135 | {"msp430x157", MSP430_ISA_15, bfd_mach_msp15}, | |
136 | ||
137 | {NULL, 0, 0} | |
138 | }; | |
139 | ||
140 | ||
141 | static struct mcu_type_s default_mcu = | |
142 | { "msp430x11", MSP430_ISA_11, bfd_mach_msp11 }; | |
143 | ||
144 | static struct mcu_type_s *msp430_mcu = &default_mcu; | |
145 | ||
146 | const pseudo_typeS md_pseudo_table[] = | |
147 | { | |
148 | {"arch", msp430_set_arch, 0}, | |
149 | {NULL, NULL, 0} | |
150 | }; | |
151 | ||
152 | #define OPTION_MMCU 'm' | |
153 | ||
154 | const char *md_shortopts = "m:"; | |
155 | ||
156 | struct option md_longopts[] = | |
157 | { | |
158 | {"mmcu", required_argument, NULL, OPTION_MMCU}, | |
159 | {NULL, no_argument, NULL, 0} | |
160 | }; | |
161 | ||
162 | size_t md_longopts_size = sizeof (md_longopts); | |
163 | ||
164 | static void | |
165 | show_mcu_list (stream) | |
166 | FILE *stream; | |
167 | { | |
168 | int i; | |
169 | ||
170 | fprintf (stream, _("Known MCU names:\n")); | |
171 | ||
172 | for (i = 0; mcu_types[i].name; i++) | |
173 | fprintf (stream, _("\t %s\n"), mcu_types[i].name); | |
174 | ||
175 | fprintf (stream, "\n"); | |
176 | } | |
177 | ||
178 | void | |
179 | md_show_usage (stream) | |
180 | FILE *stream; | |
181 | { | |
182 | fprintf (stream, | |
183 | _("MSP430 options:\n" | |
184 | " -mmcu=[msp430-name] select microcontroller type\n" | |
11d78a89 NC |
185 | " msp430x110 msp430x112\n" |
186 | " msp430x1101 msp430x1111\n" | |
187 | " msp430x1121 msp430x1122 msp430x1132\n" | |
188 | " msp430x122 msp430x123\n" | |
189 | " msp430x1331 msp430x1351\n" | |
190 | " msp430x147 msp430x148 msp430x149\n" | |
191 | " msp430x155 msp430x156 msp430x157\n" | |
192 | " msp430x167 msp430x168 msp430x169\n" | |
193 | " msp430x311 msp430x312 msp430x313 msp430x314 msp430x315\n" | |
194 | " msp430x323 msp430x325\n" | |
195 | " msp430x336 msp430x337\n" | |
196 | " msp430x412 msp430x413\n" | |
197 | " msp430x435 msp430x436 msp430x437\n" | |
198 | " msp430x447 msp430x448 msp430x449\n")); | |
2469cfa2 NC |
199 | |
200 | show_mcu_list (stream); | |
201 | } | |
202 | ||
203 | static char * | |
204 | extract_word (char *from, char *to, int limit) | |
205 | { | |
206 | char *op_start; | |
207 | char *op_end; | |
208 | int size = 0; | |
209 | ||
210 | /* Drop leading whitespace. */ | |
211 | from = skip_space (from); | |
212 | *to = 0; | |
213 | ||
214 | /* Find the op code end. */ | |
215 | for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);) | |
216 | { | |
217 | to[size++] = *op_end++; | |
218 | if (size + 1 >= limit) | |
219 | break; | |
220 | } | |
221 | ||
222 | to[size] = 0; | |
223 | return op_end; | |
224 | } | |
225 | ||
226 | static void | |
227 | msp430_set_arch (dummy) | |
228 | int dummy ATTRIBUTE_UNUSED; | |
229 | { | |
230 | char *str = (char *) alloca (32); /* 32 for good measure. */ | |
231 | ||
232 | input_line_pointer = extract_word (input_line_pointer, str, 32); | |
233 | ||
234 | md_parse_option (OPTION_MMCU, str); | |
235 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach); | |
236 | } | |
237 | ||
238 | int | |
239 | md_parse_option (c, arg) | |
240 | int c; | |
241 | char *arg; | |
242 | { | |
243 | int i; | |
244 | ||
245 | switch (c) | |
246 | { | |
247 | case OPTION_MMCU: | |
248 | for (i = 0; mcu_types[i].name; ++i) | |
249 | if (strcmp (mcu_types[i].name, arg) == 0) | |
250 | break; | |
251 | ||
252 | if (!mcu_types[i].name) | |
253 | { | |
254 | show_mcu_list (stderr); | |
255 | as_fatal (_("unknown MCU: %s\n"), arg); | |
256 | } | |
257 | ||
258 | if (msp430_mcu == &default_mcu || msp430_mcu->mach == mcu_types[i].mach) | |
259 | msp430_mcu = &mcu_types[i]; | |
260 | else | |
261 | as_fatal (_("redefinition of mcu type %s' to %s'"), | |
262 | msp430_mcu->name, mcu_types[i].name); | |
263 | return 1; | |
264 | } | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | symbolS * | |
270 | md_undefined_symbol (name) | |
271 | char *name ATTRIBUTE_UNUSED; | |
272 | { | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static inline char * | |
277 | skip_space (s) | |
278 | char *s; | |
279 | { | |
280 | while (ISSPACE (*s)) | |
281 | ++s; | |
282 | return s; | |
283 | } | |
284 | ||
285 | /* Delete spaces from s: X ( r 1 2) => X(r12). */ | |
286 | ||
287 | static void | |
288 | del_spaces (s) | |
289 | char *s; | |
290 | { | |
291 | while (*s) | |
292 | { | |
293 | if (ISSPACE (*s)) | |
294 | { | |
295 | char *m = s + 1; | |
296 | ||
297 | while (ISSPACE (*m) && *m) | |
298 | m++; | |
299 | memmove (s, m, strlen (m) + 1); | |
300 | } | |
301 | else | |
302 | s++; | |
303 | } | |
304 | } | |
305 | ||
306 | /* Extract one word from FROM and copy it to TO. Delimeters are ",;\n" */ | |
307 | ||
308 | static char * | |
309 | extract_operand (char *from, char *to, int limit) | |
310 | { | |
311 | int size = 0; | |
312 | ||
313 | /* Drop leading whitespace. */ | |
314 | from = skip_space (from); | |
315 | ||
316 | while (size < limit && *from) | |
317 | { | |
318 | *(to + size) = *from; | |
319 | if (*from == ',' || *from == ';' || *from == '\n') | |
320 | break; | |
321 | from++; | |
322 | size++; | |
323 | } | |
324 | ||
325 | *(to + size) = 0; | |
326 | del_spaces (to); | |
327 | ||
328 | from++; | |
329 | ||
330 | return from; | |
331 | } | |
332 | ||
333 | static char * | |
334 | extract_cmd (char *from, char *to, int limit) | |
335 | { | |
336 | int size = 0; | |
337 | ||
338 | while (*from && ! ISSPACE (*from) && *from != '.' && limit > size) | |
339 | { | |
340 | *(to + size) = *from; | |
341 | from++; | |
342 | size++; | |
343 | } | |
344 | ||
345 | *(to + size) = 0; | |
346 | ||
347 | return from; | |
348 | } | |
349 | ||
350 | /* Turn a string in input_line_pointer into a floating point constant | |
351 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
352 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
353 | returned, or NULL on OK. */ | |
354 | ||
355 | char * | |
356 | md_atof (type, litP, sizeP) | |
357 | int type; | |
358 | char *litP; | |
359 | int *sizeP; | |
360 | { | |
361 | int prec; | |
362 | LITTLENUM_TYPE words[4]; | |
363 | LITTLENUM_TYPE *wordP; | |
364 | char *t; | |
365 | ||
366 | switch (type) | |
367 | { | |
368 | case 'f': | |
369 | prec = 2; | |
370 | break; | |
371 | case 'd': | |
372 | prec = 4; | |
373 | break; | |
374 | default: | |
375 | *sizeP = 0; | |
376 | return _("bad call to md_atof"); | |
377 | } | |
378 | ||
379 | t = atof_ieee (input_line_pointer, type, words); | |
380 | if (t) | |
381 | input_line_pointer = t; | |
382 | ||
383 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
384 | ||
385 | /* This loop outputs the LITTLENUMs in REVERSE order. */ | |
386 | for (wordP = words + prec - 1; prec--;) | |
387 | { | |
388 | md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); | |
389 | litP += sizeof (LITTLENUM_TYPE); | |
390 | } | |
391 | ||
392 | return NULL; | |
393 | } | |
394 | ||
395 | void | |
396 | md_convert_frag (abfd, sec, fragP) | |
397 | bfd *abfd ATTRIBUTE_UNUSED; | |
398 | asection *sec ATTRIBUTE_UNUSED; | |
399 | fragS *fragP ATTRIBUTE_UNUSED; | |
400 | { | |
401 | abort (); | |
402 | } | |
403 | ||
404 | void | |
405 | md_begin () | |
406 | { | |
407 | struct msp430_opcode_s *opcode; | |
408 | msp430_hash = hash_new (); | |
409 | ||
410 | for (opcode = msp430_opcodes; opcode->name; opcode++) | |
411 | hash_insert (msp430_hash, opcode->name, (char *) opcode); | |
412 | ||
413 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach); | |
414 | } | |
415 | ||
416 | void | |
417 | md_assemble (str) | |
418 | char *str; | |
419 | { | |
420 | struct msp430_opcode_s *opcode; | |
421 | char cmd[32]; | |
422 | unsigned int i = 0; | |
423 | ||
424 | str = skip_space (str); /* Skip leading spaces. */ | |
425 | str = extract_cmd (str, cmd, sizeof (cmd)); | |
426 | ||
427 | while (cmd[i] && i < sizeof (cmd)) | |
428 | { | |
df25fda5 | 429 | char a = TOLOWER (cmd[i]); |
2469cfa2 NC |
430 | cmd[i] = a; |
431 | i++; | |
432 | } | |
433 | ||
434 | if (!cmd[0]) | |
435 | { | |
436 | as_bad (_("can't find opcode ")); | |
437 | return; | |
438 | } | |
439 | ||
440 | opcode = (struct msp430_opcode_s *) hash_find (msp430_hash, cmd); | |
441 | ||
442 | if (opcode == NULL) | |
443 | { | |
444 | as_bad (_("unknown opcode `%s'"), cmd); | |
445 | return; | |
446 | } | |
447 | ||
448 | { | |
449 | char *__t = input_line_pointer; | |
450 | msp430_operands (opcode, str); | |
451 | input_line_pointer = __t; | |
452 | } | |
453 | } | |
454 | ||
455 | /* Parse instruction operands. | |
456 | Return binary opcode. */ | |
457 | ||
458 | static unsigned int | |
459 | msp430_operands (opcode, line) | |
460 | struct msp430_opcode_s *opcode; | |
461 | char *line; | |
462 | { | |
463 | int bin = opcode->bin_opcode; /* opcode mask. */ | |
464 | int __is; | |
465 | char l1[MAX_OP_LEN], l2[MAX_OP_LEN]; | |
466 | char *frag; | |
467 | int where; | |
468 | struct msp430_operand_s op1, op2; | |
469 | int res = 0; | |
470 | static short ZEROS = 0; | |
471 | int byte_op, imm_op; | |
472 | ||
473 | /* opcode is the one from opcodes table | |
474 | line contains something like | |
475 | [.w] @r2+, 5(R1) | |
476 | or | |
477 | .b @r2+, 5(R1). */ | |
478 | ||
479 | /* Check if byte or word operation. */ | |
df25fda5 | 480 | if (*line == '.' && TOLOWER (*(line + 1)) == 'b') |
2469cfa2 NC |
481 | { |
482 | bin |= BYTE_OPERATION; | |
483 | byte_op = 1; | |
484 | } | |
485 | else | |
486 | byte_op = 0; | |
487 | ||
488 | /* skip .[bwBW]. */ | |
489 | while (! ISSPACE (*line) && *line) | |
490 | line++; | |
491 | ||
492 | if (opcode->insn_opnumb && (!*line || *line == '\n')) | |
493 | { | |
494 | as_bad (_("instruction %s requires %d operand(s)"), | |
495 | opcode->name, opcode->insn_opnumb); | |
496 | return 0; | |
497 | } | |
498 | ||
499 | memset (l1, 0, sizeof (l1)); | |
500 | memset (l2, 0, sizeof (l2)); | |
501 | memset (&op1, 0, sizeof (op1)); | |
502 | memset (&op2, 0, sizeof (op2)); | |
503 | ||
504 | imm_op = 0; | |
505 | ||
506 | switch (opcode->fmt) | |
507 | { | |
508 | case 0: /* Emulated. */ | |
509 | switch (opcode->insn_opnumb) | |
510 | { | |
511 | case 0: | |
512 | /* Set/clear bits instructions. */ | |
513 | __is = 2; | |
514 | frag = frag_more (__is); | |
515 | bfd_putl16 ((bfd_vma) bin, frag); | |
516 | break; | |
517 | case 1: | |
518 | /* Something which works with destination operand. */ | |
519 | line = extract_operand (line, l1, sizeof (l1)); | |
520 | res = msp430_dstoperand (&op1, l1, opcode->bin_opcode); | |
521 | if (res) | |
522 | break; | |
523 | ||
524 | bin |= (op1.reg | (op1.am << 7)); | |
525 | __is = 1 + op1.ol; | |
526 | frag = frag_more (2 * __is); | |
527 | where = frag - frag_now->fr_literal; | |
528 | bfd_putl16 ((bfd_vma) bin, frag); | |
529 | ||
530 | if (op1.mode == OP_EXP) | |
531 | { | |
532 | where += 2; | |
533 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
534 | ||
535 | if (op1.reg) | |
536 | fix_new_exp (frag_now, where, 2, | |
537 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
538 | else | |
539 | fix_new_exp (frag_now, where, 2, | |
540 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
541 | } | |
542 | break; | |
543 | ||
544 | case 2: | |
545 | { | |
546 | char l2[16]; | |
547 | ||
548 | /* Shift instruction. */ | |
549 | line = extract_operand (line, l1, sizeof (l1)); | |
550 | strncpy (l2, l1, 16); | |
551 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op); | |
552 | res += msp430_dstoperand (&op2, l2, opcode->bin_opcode); | |
553 | ||
554 | if (res) | |
555 | break; /* An error occured. All warnings were done before. */ | |
556 | ||
557 | bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7)); | |
558 | ||
559 | __is = 1 + op1.ol + op2.ol; /* insn size in words. */ | |
560 | frag = frag_more (2 * __is); | |
561 | where = frag - frag_now->fr_literal; | |
562 | bfd_putl16 ((bfd_vma) bin, frag); | |
563 | ||
564 | if (op1.mode == OP_EXP) | |
565 | { | |
566 | where += 2; /* Advance 'where' as we do not know _where_. */ | |
567 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
568 | ||
569 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ | |
570 | fix_new_exp (frag_now, where, 2, | |
571 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
572 | else | |
573 | fix_new_exp (frag_now, where, 2, | |
574 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
575 | } | |
576 | ||
577 | if (op2.mode == OP_EXP) | |
578 | { | |
579 | imm_op = 0; | |
580 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0)); | |
581 | ||
582 | if (op2.reg) /* Not PC relative. */ | |
583 | fix_new_exp (frag_now, where + 2, 2, | |
584 | &(op2.exp), FALSE, CHECK_RELOC_MSP430); | |
585 | else | |
586 | fix_new_exp (frag_now, where + 2, 2, | |
587 | &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
588 | } | |
589 | break; | |
590 | } | |
591 | case 3: | |
592 | /* Branch instruction => mov dst, r0. */ | |
593 | line = extract_operand (line, l1, sizeof (l1)); | |
594 | ||
595 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op); | |
596 | if (res) | |
597 | break; | |
598 | ||
599 | byte_op = 0; | |
600 | imm_op = 0; | |
601 | ||
602 | bin |= ((op1.reg << 8) | (op1.am << 4)); | |
603 | __is = 1 + op1.ol; | |
604 | frag = frag_more (2 * __is); | |
605 | where = frag - frag_now->fr_literal; | |
606 | bfd_putl16 ((bfd_vma) bin, frag); | |
607 | ||
608 | if (op1.mode == OP_EXP) | |
609 | { | |
610 | where += 2; | |
611 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
612 | ||
613 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) | |
614 | fix_new_exp (frag_now, where, 2, | |
615 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
616 | else | |
617 | fix_new_exp (frag_now, where, 2, | |
618 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
619 | } | |
620 | break; | |
621 | } | |
622 | break; | |
623 | ||
624 | case 1: /* Format 1, double operand. */ | |
625 | line = extract_operand (line, l1, sizeof (l1)); | |
626 | line = extract_operand (line, l2, sizeof (l2)); | |
627 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op); | |
628 | res += msp430_dstoperand (&op2, l2, opcode->bin_opcode); | |
629 | ||
630 | if (res) | |
631 | break; /* Error occured. All warnings were done before. */ | |
632 | ||
633 | bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7)); | |
634 | ||
635 | __is = 1 + op1.ol + op2.ol; /* insn size in words. */ | |
636 | frag = frag_more (2 * __is); | |
637 | where = frag - frag_now->fr_literal; | |
638 | bfd_putl16 ((bfd_vma) bin, frag); | |
639 | ||
640 | if (op1.mode == OP_EXP) | |
641 | { | |
642 | where += 2; /* Advance where as we do not know _where_. */ | |
643 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
644 | ||
645 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ | |
646 | fix_new_exp (frag_now, where, 2, | |
647 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
648 | else | |
649 | fix_new_exp (frag_now, where, 2, | |
650 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
651 | } | |
652 | ||
653 | if (op2.mode == OP_EXP) | |
654 | { | |
655 | imm_op = 0; | |
656 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0)); | |
657 | ||
658 | if (op2.reg) /* Not PC relative. */ | |
659 | fix_new_exp (frag_now, where + 2, 2, | |
660 | &(op2.exp), FALSE, CHECK_RELOC_MSP430); | |
661 | else | |
662 | fix_new_exp (frag_now, where + 2, 2, | |
663 | &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
664 | } | |
665 | break; | |
666 | ||
667 | case 2: /* Single-operand mostly instr. */ | |
668 | if (opcode->insn_opnumb == 0) | |
669 | { | |
670 | /* reti instruction. */ | |
671 | frag = frag_more (2); | |
672 | bfd_putl16 ((bfd_vma) bin, frag); | |
673 | break; | |
674 | } | |
675 | ||
676 | line = extract_operand (line, l1, sizeof (l1)); | |
677 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op); | |
678 | if (res) | |
679 | break; /* Error in operand. */ | |
680 | ||
681 | bin |= op1.reg | (op1.am << 4); | |
682 | __is = 1 + op1.ol; | |
683 | frag = frag_more (2 * __is); | |
684 | where = frag - frag_now->fr_literal; | |
685 | bfd_putl16 ((bfd_vma) bin, frag); | |
686 | ||
687 | if (op1.mode == OP_EXP) | |
688 | { | |
689 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
690 | ||
691 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ | |
692 | fix_new_exp (frag_now, where + 2, 2, | |
693 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
694 | else | |
695 | fix_new_exp (frag_now, where + 2, 2, | |
696 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
697 | } | |
698 | break; | |
699 | ||
700 | case 3: /* Conditional jumps instructions. */ | |
701 | line = extract_operand (line, l1, sizeof (l1)); | |
702 | /* l1 is a label. */ | |
703 | if (l1[0]) | |
704 | { | |
705 | char *m = l1; | |
706 | expressionS exp; | |
707 | ||
708 | if (*m == '$') | |
709 | m++; | |
710 | ||
711 | parse_exp (m, &exp); | |
712 | frag = frag_more (2); /* Instr size is 1 word. */ | |
713 | ||
714 | /* In order to handle something like: | |
715 | ||
716 | and #0x8000, r5 | |
717 | tst r5 | |
718 | jz 4 ; skip next 4 bytes | |
719 | inv r5 | |
720 | inc r5 | |
721 | nop ; will jump here if r5 positive or zero | |
722 | ||
723 | jCOND -n ;assumes jump n bytes backward: | |
724 | ||
725 | mov r5,r6 | |
726 | jmp -2 | |
727 | ||
728 | is equial to: | |
729 | lab: | |
730 | mov r5,r6 | |
731 | jmp lab | |
732 | ||
733 | jCOND $n ; jump from PC in either direction. */ | |
734 | ||
735 | if (exp.X_op == O_constant) | |
736 | { | |
737 | int x = exp.X_add_number; | |
738 | ||
739 | if (x & 1) | |
740 | { | |
741 | as_warn (_("Even number required. Rounded to %d"), x + 1); | |
742 | x++; | |
743 | } | |
744 | ||
745 | if ((*l1 == '$' && x > 0) || x < 0) | |
746 | x -= 2; | |
747 | ||
748 | x >>= 1; | |
749 | ||
750 | if (x > 512 || x < -511) | |
751 | { | |
752 | as_bad (_("Wrong displacement %d"), x << 1); | |
753 | break; | |
754 | } | |
755 | ||
756 | bin |= x & 0x3ff; | |
757 | bfd_putl16 ((bfd_vma) bin, frag); | |
758 | } | |
759 | else if (exp.X_op == O_symbol && *l1 != '$') | |
760 | { | |
761 | where = frag - frag_now->fr_literal; | |
762 | fix_new_exp (frag_now, where, 2, | |
763 | &exp, TRUE, BFD_RELOC_MSP430_10_PCREL); | |
764 | ||
765 | bfd_putl16 ((bfd_vma) bin, frag); | |
766 | } | |
767 | else if (*l1 == '$') | |
768 | { | |
769 | as_bad (_("instruction requires label sans '$'")); | |
770 | break; | |
771 | } | |
772 | else | |
773 | { | |
774 | as_bad (_ | |
775 | ("instruction requires label or value in range -511:512")); | |
776 | break; | |
777 | } | |
778 | } | |
779 | else | |
780 | { | |
781 | as_bad (_("instruction requires label")); | |
782 | break; | |
783 | } | |
784 | break; | |
785 | ||
786 | default: | |
787 | as_bad (_("Ilegal instruction or not implmented opcode.")); | |
788 | } | |
789 | ||
790 | input_line_pointer = line; | |
791 | return 0; | |
792 | } | |
793 | ||
794 | static int | |
795 | msp430_dstoperand (op, l, bin) | |
796 | struct msp430_operand_s *op; | |
797 | char *l; | |
798 | int bin; | |
799 | { | |
800 | int dummy; | |
801 | int ret = msp430_srcoperand (op, l, bin, &dummy); | |
802 | if (ret) | |
803 | return ret; | |
804 | ||
805 | if (op->am == 2) | |
806 | { | |
807 | char *__tl = "0"; | |
808 | ||
809 | op->mode = OP_EXP; | |
810 | op->am = 1; | |
811 | op->ol = 1; | |
812 | parse_exp (__tl, &(op->exp)); | |
813 | if (op->exp.X_op != O_constant || op->exp.X_add_number != 0) | |
814 | { | |
815 | as_bad (_("Internal bug. Try to use 0(r%d) instead of @r%d"), | |
816 | op->reg, op->reg); | |
817 | return 1; | |
818 | } | |
819 | return 0; | |
820 | } | |
821 | ||
822 | if (op->am > 1) | |
823 | { | |
824 | as_bad (_ | |
825 | ("this addressing mode is not applicable for destination operand")); | |
826 | return 1; | |
827 | } | |
828 | return 0; | |
829 | } | |
830 | ||
831 | ||
832 | static int | |
833 | check_reg (t) | |
834 | char *t; | |
835 | { | |
836 | /* If this is a reg numb, str 't' must be a number from 0 - 15. */ | |
837 | ||
838 | if (strlen (t) > 2 && *(t + 2) != '+') | |
839 | return 1; | |
840 | ||
841 | while (*t) | |
842 | { | |
843 | if ((*t < '0' || *t > '9') && *t != '+') | |
844 | break; | |
845 | t++; | |
846 | } | |
847 | ||
848 | if (*t) | |
849 | return 1; | |
850 | ||
851 | return 0; | |
852 | } | |
853 | ||
854 | ||
855 | static int | |
856 | msp430_srcoperand (op, l, bin, imm_op) | |
857 | struct msp430_operand_s *op; | |
858 | char *l; | |
859 | int bin; | |
860 | int *imm_op; | |
861 | { | |
862 | char *__tl = l; | |
863 | ||
864 | /* Check if an immediate #VALUE. The hash sign should be only at the beginning! */ | |
865 | if (*l == '#') | |
866 | { | |
867 | char *h = l; | |
868 | int vshift = -1; | |
869 | int rval = 0; | |
870 | ||
871 | /* Check if there is: | |
872 | llo(x) - least significant 16 bits, x &= 0xffff | |
873 | lhi(x) - x = (x >> 16) & 0xffff, | |
874 | hlo(x) - x = (x >> 32) & 0xffff, | |
875 | hhi(x) - x = (x >> 48) & 0xffff | |
876 | The value _MUST_ be constant expression: #hlo(1231231231). */ | |
877 | ||
878 | *imm_op = 1; | |
879 | ||
880 | if (strncasecmp (h, "#llo(", 5) == 0) | |
881 | { | |
882 | vshift = 0; | |
883 | rval = 3; | |
884 | } | |
885 | else if (strncasecmp (h, "#lhi(", 5) == 0) | |
886 | { | |
887 | vshift = 1; | |
888 | rval = 3; | |
889 | } | |
890 | else if (strncasecmp (h, "#hlo(", 5) == 0) | |
891 | { | |
892 | vshift = 2; | |
893 | rval = 3; | |
894 | } | |
895 | else if (strncasecmp (h, "#hhi(", 5) == 0) | |
896 | { | |
897 | vshift = 3; | |
898 | rval = 3; | |
899 | } | |
900 | else if (strncasecmp (h, "#lo(", 4) == 0) | |
901 | { | |
902 | vshift = 0; | |
903 | rval = 2; | |
904 | } | |
905 | else if (strncasecmp (h, "#hi(", 4) == 0) | |
906 | { | |
907 | vshift = 1; | |
908 | rval = 2; | |
909 | } | |
910 | ||
911 | op->reg = 0; /* Reg PC. */ | |
912 | op->am = 3; | |
913 | op->ol = 1; /* Immediate will follow an instruction. */ | |
914 | __tl = h + 1 + rval; | |
915 | op->mode = OP_EXP; | |
916 | parse_exp (__tl, &(op->exp)); | |
917 | if (op->exp.X_op == O_constant) | |
918 | { | |
919 | int x = op->exp.X_add_number; | |
920 | ||
921 | if (vshift == 0) | |
922 | { | |
923 | x = x & 0xffff; | |
924 | op->exp.X_add_number = x; | |
925 | } | |
926 | else if (vshift == 1) | |
927 | { | |
928 | x = (x >> 16) & 0xffff; | |
929 | op->exp.X_add_number = x; | |
930 | } | |
931 | else if (vshift > 1) | |
932 | { | |
933 | if (x < 0) | |
934 | op->exp.X_add_number = -1; | |
935 | else | |
936 | op->exp.X_add_number = 0; /* Nothing left. */ | |
937 | x = op->exp.X_add_number; | |
938 | } | |
939 | ||
940 | if (op->exp.X_add_number > 65535 || op->exp.X_add_number < -32768) | |
941 | { | |
942 | as_bad (_("value %ld out of range. Use #lo() or #hi()"), x); | |
943 | return 1; | |
944 | } | |
945 | ||
946 | /* Now check constants. */ | |
947 | /* Substitude register mode with a constant generator if applicable. */ | |
948 | ||
949 | x = (short) x; /* Extend sign. */ | |
950 | ||
951 | if (x == 0) | |
952 | { | |
953 | op->reg = 3; | |
954 | op->am = 0; | |
955 | op->ol = 0; | |
956 | op->mode = OP_REG; | |
957 | } | |
958 | else if (x == 1) | |
959 | { | |
960 | op->reg = 3; | |
961 | op->am = 1; | |
962 | op->ol = 0; | |
963 | op->mode = OP_REG; | |
964 | } | |
965 | else if (x == 2) | |
966 | { | |
967 | op->reg = 3; | |
968 | op->am = 2; | |
969 | op->ol = 0; | |
970 | op->mode = OP_REG; | |
971 | } | |
972 | else if (x == -1) | |
973 | { | |
974 | op->reg = 3; | |
975 | op->am = 3; | |
976 | op->ol = 0; | |
977 | op->mode = OP_REG; | |
978 | } | |
979 | else if (x == 4) | |
980 | { | |
981 | #ifdef PUSH_1X_WORKAROUND | |
982 | if (bin == 0x1200 | |
983 | && (msp430_mcu->isa == MSP430_ISA_11 | |
984 | || msp430_mcu->isa == MSP430_ISA_12 | |
985 | || msp430_mcu->isa == MSP430_ISA_13 | |
986 | || msp430_mcu->isa == MSP430_ISA_14)) | |
987 | { | |
988 | /* Remove warning as confusing. | |
989 | as_warn(_("Hardware push bug workaround")); */ | |
990 | } | |
991 | else | |
992 | #endif | |
993 | { | |
994 | op->reg = 2; | |
995 | op->am = 2; | |
996 | op->ol = 0; | |
997 | op->mode = OP_REG; | |
998 | } | |
999 | } | |
1000 | else if (x == 8) | |
1001 | { | |
1002 | #ifdef PUSH_1X_WORKAROUND | |
1003 | if (bin == 0x1200 | |
1004 | && (msp430_mcu->isa == MSP430_ISA_11 | |
1005 | || msp430_mcu->isa == MSP430_ISA_12 | |
1006 | || msp430_mcu->isa == MSP430_ISA_13 | |
1007 | || msp430_mcu->isa == MSP430_ISA_14)) | |
1008 | { | |
1009 | /* Remove warning as confusing. | |
1010 | as_warn(_("Hardware push bug workaround")); */ | |
1011 | } | |
1012 | else | |
1013 | #endif | |
1014 | { | |
1015 | op->reg = 2; | |
1016 | op->am = 3; | |
1017 | op->ol = 0; | |
1018 | op->mode = OP_REG; | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | else if (op->exp.X_op == O_symbol) | |
1023 | { | |
1024 | op->mode = OP_EXP; | |
1025 | } | |
1026 | else if (op->exp.X_op == O_big) | |
1027 | { | |
1028 | short x; | |
1029 | if (vshift != -1) | |
1030 | { | |
1031 | op->exp.X_op = O_constant; | |
1032 | op->exp.X_add_number = 0xffff & generic_bignum[vshift]; | |
1033 | x = op->exp.X_add_number; | |
1034 | } | |
1035 | else | |
1036 | { | |
1037 | as_bad (_ | |
1038 | ("unknown expression in operand %s. use #llo() #lhi() #hlo() #hhi() "), | |
1039 | l); | |
1040 | return 1; | |
1041 | } | |
1042 | ||
1043 | if (x == 0) | |
1044 | { | |
1045 | op->reg = 3; | |
1046 | op->am = 0; | |
1047 | op->ol = 0; | |
1048 | op->mode = OP_REG; | |
1049 | } | |
1050 | else if (x == 1) | |
1051 | { | |
1052 | op->reg = 3; | |
1053 | op->am = 1; | |
1054 | op->ol = 0; | |
1055 | op->mode = OP_REG; | |
1056 | } | |
1057 | else if (x == 2) | |
1058 | { | |
1059 | op->reg = 3; | |
1060 | op->am = 2; | |
1061 | op->ol = 0; | |
1062 | op->mode = OP_REG; | |
1063 | } | |
1064 | else if (x == -1) | |
1065 | { | |
1066 | op->reg = 3; | |
1067 | op->am = 3; | |
1068 | op->ol = 0; | |
1069 | op->mode = OP_REG; | |
1070 | } | |
1071 | else if (x == 4) | |
1072 | { | |
1073 | op->reg = 2; | |
1074 | op->am = 2; | |
1075 | op->ol = 0; | |
1076 | op->mode = OP_REG; | |
1077 | } | |
1078 | else if (x == 8) | |
1079 | { | |
1080 | op->reg = 2; | |
1081 | op->am = 3; | |
1082 | op->ol = 0; | |
1083 | op->mode = OP_REG; | |
1084 | } | |
1085 | } | |
1086 | else | |
1087 | { | |
1088 | as_bad (_("unknown operand %s"), l); | |
1089 | } | |
1090 | return 0; | |
1091 | } | |
1092 | ||
1093 | /* Check if absolute &VALUE (assume that we can construct something like ((a&b)<<7 + 25). */ | |
1094 | if (*l == '&') | |
1095 | { | |
1096 | char *h = l; | |
1097 | ||
1098 | op->reg = 2; /* reg 2 in absolute addr mode. */ | |
1099 | op->am = 1; /* mode As == 01 bin. */ | |
1100 | op->ol = 1; /* Immediate value followed by instruction. */ | |
1101 | __tl = h + 1; | |
1102 | parse_exp (__tl, &(op->exp)); | |
1103 | op->mode = OP_EXP; | |
1104 | if (op->exp.X_op == O_constant) | |
1105 | { | |
1106 | int x = op->exp.X_add_number; | |
1107 | if (x > 65535 || x < -32768) | |
1108 | { | |
1109 | as_bad (_("value out of range: %d"), x); | |
1110 | return 1; | |
1111 | } | |
1112 | } | |
1113 | else if (op->exp.X_op == O_symbol) | |
1114 | { | |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | as_bad (_("unknown expression in operand %s"), l); | |
1119 | return 1; | |
1120 | } | |
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | /* Check if inderect register mode @Rn / postincrement @Rn+. */ | |
1125 | if (*l == '@') | |
1126 | { | |
1127 | char *t = l; | |
1128 | char *m = strchr (l, '+'); | |
1129 | ||
1130 | if (t != l) | |
1131 | { | |
1132 | as_bad (_("unknown addressing mode %s"), l); | |
1133 | return 1; | |
1134 | } | |
1135 | ||
1136 | t++; | |
1137 | if (*t != 'r' && *t != 'R') | |
1138 | { | |
1139 | as_bad (_("unknown addressing mode %s"), l); | |
1140 | return 1; | |
1141 | } | |
1142 | ||
1143 | t++; /* Points to the reg value. */ | |
1144 | ||
1145 | if (check_reg (t)) | |
1146 | { | |
1147 | as_bad (_("Bad register name r%s"), t); | |
1148 | return 1; | |
1149 | } | |
1150 | ||
1151 | op->mode = OP_REG; | |
1152 | op->am = m ? 3 : 2; | |
1153 | op->ol = 0; | |
1154 | if (m) | |
1155 | *m = 0; /* strip '+' */ | |
1156 | op->reg = atoi (t); | |
1157 | if (op->reg < 0 || op->reg > 15) | |
1158 | { | |
1159 | as_bad (_("MSP430 does not have %d registers"), op->reg); | |
1160 | return 1; | |
1161 | } | |
1162 | ||
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | /* Check if register indexed X(Rn). */ | |
1167 | do | |
1168 | { | |
1169 | char *h = strrchr (l, '('); | |
1170 | char *m = strrchr (l, ')'); | |
1171 | char *t; | |
1172 | ||
1173 | *imm_op = 1; | |
1174 | ||
1175 | if (!h) | |
1176 | break; | |
1177 | if (!m) | |
1178 | { | |
1179 | as_bad (_("')' required")); | |
1180 | return 1; | |
1181 | } | |
1182 | ||
1183 | t = h; | |
1184 | op->am = 1; | |
1185 | op->ol = 1; | |
1186 | /* Extract a register. */ | |
1187 | t++; /* Advance pointer. */ | |
1188 | ||
1189 | if (*t != 'r' && *t != 'R') | |
1190 | { | |
1191 | as_bad (_ | |
1192 | ("unknown operator %s. Did you mean X(Rn) or #[hl][hl][oi](CONST) ?"), | |
1193 | l); | |
1194 | return 1; | |
1195 | } | |
1196 | t++; | |
1197 | ||
1198 | op->reg = *t - '0'; | |
1199 | if (op->reg > 9 || op->reg < 0) | |
1200 | { | |
1201 | as_bad (_("unknown operator (r%s substituded as a register name"), | |
1202 | t); | |
1203 | return 1; | |
1204 | } | |
1205 | t++; | |
1206 | if (*t != ')') | |
1207 | { | |
1208 | op->reg = op->reg * 10; | |
1209 | op->reg += *t - '0'; | |
1210 | ||
1211 | if (op->reg > 15) | |
1212 | { | |
1213 | as_bad (_("unknown operator %s"), l); | |
1214 | return 1; | |
1215 | } | |
1216 | if (op->reg == 2) | |
1217 | { | |
1218 | as_bad (_("r2 should not be used in indexed addressing mode")); | |
1219 | return 1; | |
1220 | } | |
1221 | ||
1222 | if (*(t + 1) != ')') | |
1223 | { | |
1224 | as_bad (_("unknown operator %s"), l); | |
1225 | return 1; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | /* Extract constant. */ | |
1230 | __tl = l; | |
1231 | *h = 0; | |
1232 | op->mode = OP_EXP; | |
1233 | parse_exp (__tl, &(op->exp)); | |
1234 | if (op->exp.X_op == O_constant) | |
1235 | { | |
1236 | int x = op->exp.X_add_number; | |
1237 | ||
1238 | if (x > 65535 || x < -32768) | |
1239 | { | |
1240 | as_bad (_("value out of range: %d"), x); | |
1241 | return 1; | |
1242 | } | |
1243 | ||
1244 | if (x == 0) | |
1245 | { | |
1246 | op->mode = OP_REG; | |
1247 | op->am = 2; | |
1248 | op->ol = 0; | |
1249 | return 0; | |
1250 | } | |
1251 | } | |
1252 | else if (op->exp.X_op == O_symbol) | |
1253 | { | |
1254 | } | |
1255 | else | |
1256 | { | |
1257 | as_bad (_("unknown expression in operand %s"), l); | |
1258 | return 1; | |
1259 | } | |
1260 | ||
1261 | return 0; | |
1262 | } | |
1263 | while (0); | |
1264 | ||
1265 | /* Register mode 'mov r1,r2'. */ | |
1266 | do | |
1267 | { | |
1268 | char *t = l; | |
1269 | ||
1270 | /* Operand should be a register. */ | |
1271 | if (*t == 'r' || *t == 'R') | |
1272 | { | |
1273 | int x = atoi (t + 1); | |
1274 | ||
1275 | if (check_reg (t + 1)) | |
1276 | break; | |
1277 | ||
1278 | if (x < 0 || x > 15) | |
1279 | break; /* Symbolic mode. */ | |
1280 | ||
1281 | op->mode = OP_REG; | |
1282 | op->am = 0; | |
1283 | op->ol = 0; | |
1284 | op->reg = x; | |
1285 | return 0; | |
1286 | } | |
1287 | } | |
1288 | while (0); | |
1289 | ||
1290 | /* Symbolic mode 'mov a, b' == 'mov x(pc), y(pc)'. */ | |
1291 | do | |
1292 | { | |
1293 | char *t = l; | |
1294 | ||
1295 | __tl = l; | |
1296 | ||
1297 | while (*t) | |
1298 | { | |
1299 | /* alpha/number underline dot for labels. */ | |
1300 | if (! ISALNUM (*t) && *t != '_' && *t != '.') | |
1301 | { | |
1302 | as_bad (_("unknown operand %s"), l); | |
1303 | return 1; | |
1304 | } | |
1305 | t++; | |
1306 | } | |
1307 | ||
1308 | op->mode = OP_EXP; | |
1309 | op->reg = 0; /* PC relative... be careful. */ | |
1310 | op->am = 1; | |
1311 | op->ol = 1; | |
1312 | __tl = l; | |
1313 | parse_exp (__tl, &(op->exp)); | |
1314 | return 0; | |
1315 | } | |
1316 | while (0); | |
1317 | ||
1318 | /* Unreachable. */ | |
1319 | as_bad (_("unknown addressing mode for operand %s"), l); | |
1320 | return 1; | |
1321 | } | |
1322 | ||
1323 | ||
1324 | /* GAS will call this function for each section at the end of the assembly, | |
1325 | to permit the CPU backend to adjust the alignment of a section. */ | |
1326 | ||
1327 | valueT | |
1328 | md_section_align (seg, addr) | |
1329 | asection *seg; | |
1330 | valueT addr; | |
1331 | { | |
1332 | int align = bfd_get_section_alignment (stdoutput, seg); | |
1333 | ||
1334 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
1335 | } | |
1336 | ||
1337 | /* If you define this macro, it should return the offset between the | |
1338 | address of a PC relative fixup and the position from which the PC | |
1339 | relative adjustment should be made. On many processors, the base | |
1340 | of a PC relative instruction is the next instruction, so this | |
1341 | macro would return the length of an instruction. */ | |
1342 | ||
1343 | long | |
1344 | md_pcrel_from_section (fixp, sec) | |
1345 | fixS *fixp; | |
1346 | segT sec; | |
1347 | { | |
1348 | if (fixp->fx_addsy != (symbolS *) NULL | |
1349 | && (!S_IS_DEFINED (fixp->fx_addsy) | |
1350 | || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) | |
1351 | return 0; | |
1352 | ||
1353 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
1354 | } | |
1355 | ||
1356 | /* GAS will call this for each fixup. It should store the correct | |
1357 | value in the object file. */ | |
1358 | ||
1359 | void | |
1360 | md_apply_fix3 (fixp, valuep, seg) | |
1361 | fixS *fixp; | |
1362 | valueT *valuep; | |
1363 | segT seg; | |
1364 | { | |
1365 | unsigned char *where; | |
1366 | unsigned long insn; | |
1367 | long value; | |
1368 | ||
1369 | if (fixp->fx_addsy == (symbolS *) NULL) | |
1370 | { | |
1371 | value = *valuep; | |
1372 | fixp->fx_done = 1; | |
1373 | } | |
1374 | else if (fixp->fx_pcrel) | |
1375 | { | |
1376 | segT s = S_GET_SEGMENT (fixp->fx_addsy); | |
1377 | ||
1378 | if (fixp->fx_addsy && (s == seg || s == absolute_section)) | |
1379 | { | |
1380 | value = S_GET_VALUE (fixp->fx_addsy) + *valuep; | |
1381 | fixp->fx_done = 1; | |
1382 | } | |
1383 | else | |
1384 | value = *valuep; | |
1385 | } | |
1386 | else | |
1387 | { | |
1388 | value = fixp->fx_offset; | |
1389 | ||
1390 | if (fixp->fx_subsy != (symbolS *) NULL) | |
1391 | { | |
1392 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
1393 | { | |
1394 | value -= S_GET_VALUE (fixp->fx_subsy); | |
1395 | fixp->fx_done = 1; | |
1396 | } | |
1397 | else | |
1398 | { | |
1399 | /* We don't actually support subtracting a symbol. */ | |
1400 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1401 | _("expression too complex")); | |
1402 | } | |
1403 | } | |
1404 | } | |
1405 | ||
1406 | switch (fixp->fx_r_type) | |
1407 | { | |
1408 | default: | |
1409 | fixp->fx_no_overflow = 1; | |
1410 | break; | |
1411 | case BFD_RELOC_MSP430_10_PCREL: | |
1412 | break; | |
1413 | } | |
1414 | ||
1415 | if (fixp->fx_done) | |
1416 | { | |
1417 | /* Fetch the instruction, insert the fully resolved operand | |
1418 | value, and stuff the instruction back again. */ | |
1419 | ||
1420 | where = fixp->fx_frag->fr_literal + fixp->fx_where; | |
1421 | ||
1422 | insn = bfd_getl16 (where); | |
1423 | ||
1424 | switch (fixp->fx_r_type) | |
1425 | { | |
1426 | case BFD_RELOC_MSP430_10_PCREL: | |
1427 | if (value & 1) | |
1428 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1429 | _("odd address operand: %ld"), value); | |
1430 | ||
1431 | /* Jumps are in words. */ | |
1432 | value >>= 1; | |
1433 | --value; /* Correct PC. */ | |
1434 | ||
1435 | if (value < -512 || value > 511) | |
1436 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1437 | _("operand out of range: %ld"), value); | |
1438 | ||
1439 | value &= 0x3ff; /* get rid of extended sign */ | |
1440 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
1441 | break; | |
1442 | ||
1443 | case BFD_RELOC_MSP430_16_PCREL: | |
1444 | if (value & 1) | |
1445 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1446 | _("odd address operand: %ld"), value); | |
1447 | ||
1448 | /* Nothing to be corrected here. */ | |
1449 | if (value < -32768 || value > 65536) | |
1450 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1451 | _("operand out of range: %ld"), value); | |
1452 | ||
1453 | value &= 0xffff; /* Get rid of extended sign. */ | |
1454 | bfd_putl16 ((bfd_vma) value, where); | |
1455 | break; | |
1456 | ||
1457 | case BFD_RELOC_MSP430_16_PCREL_BYTE: | |
1458 | /* Nothing to be corrected here. */ | |
1459 | if (value < -32768 || value > 65536) | |
1460 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1461 | _("operand out of range: %ld"), value); | |
1462 | ||
1463 | value &= 0xffff; /* Get rid of extended sign. */ | |
1464 | bfd_putl16 ((bfd_vma) value, where); | |
1465 | break; | |
1466 | ||
1467 | case BFD_RELOC_32: | |
1468 | bfd_putl16 ((bfd_vma) value, where); | |
1469 | break; | |
1470 | ||
1471 | case BFD_RELOC_MSP430_16: | |
1472 | case BFD_RELOC_16: | |
1473 | case BFD_RELOC_MSP430_16_BYTE: | |
1474 | value &= 0xffff; | |
1475 | bfd_putl16 ((bfd_vma) value, where); | |
1476 | break; | |
1477 | ||
1478 | default: | |
1479 | as_fatal (_("line %d: unknown relocation type: 0x%x"), | |
1480 | fixp->fx_line, fixp->fx_r_type); | |
1481 | break; | |
1482 | } | |
1483 | } | |
1484 | else | |
1485 | { | |
1486 | fixp->fx_addnumber = value; | |
1487 | } | |
1488 | return; | |
1489 | } | |
1490 | ||
1491 | /* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS | |
1492 | will pass the resulting reloc to `bfd_install_relocation'. This | |
1493 | currently works poorly, as `bfd_install_relocation' often does the | |
1494 | wrong thing, and instances of `tc_gen_reloc' have been written to | |
1495 | work around the problems, which in turns makes it difficult to fix | |
1496 | `bfd_install_relocation'. */ | |
1497 | ||
1498 | /* If while processing a fixup, a reloc really needs to be created | |
1499 | then it is done here. */ | |
1500 | ||
1501 | arelent * | |
1502 | tc_gen_reloc (seg, fixp) | |
1503 | asection *seg ATTRIBUTE_UNUSED; | |
1504 | fixS *fixp; | |
1505 | { | |
1506 | arelent *reloc; | |
1507 | ||
1508 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
1509 | ||
1510 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
1511 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
1512 | ||
1513 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1514 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
1515 | if (reloc->howto == (reloc_howto_type *) NULL) | |
1516 | { | |
1517 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1518 | _("reloc %d not supported by object file format"), | |
1519 | (int) fixp->fx_r_type); | |
1520 | return NULL; | |
1521 | } | |
1522 | ||
1523 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
1524 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
1525 | reloc->address = fixp->fx_offset; | |
1526 | ||
1527 | reloc->addend = fixp->fx_offset; | |
1528 | ||
1529 | return reloc; | |
1530 | } | |
1531 | ||
1532 | /* Parse ordinary expression. */ | |
1533 | ||
1534 | static char * | |
1535 | parse_exp (s, op) | |
1536 | char *s; | |
1537 | expressionS *op; | |
1538 | { | |
1539 | input_line_pointer = s; | |
1540 | expression (op); | |
1541 | if (op->X_op == O_absent) | |
1542 | as_bad (_("missing operand")); | |
1543 | return input_line_pointer; | |
1544 | } | |
1545 | ||
1546 | ||
1547 | int | |
1548 | md_estimate_size_before_relax (fragp, seg) | |
1549 | fragS *fragp ATTRIBUTE_UNUSED; | |
1550 | asection *seg ATTRIBUTE_UNUSED; | |
1551 | { | |
1552 | abort (); | |
1553 | return 0; | |
1554 | } |