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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 | |
3b260895 | 74 | #define MSP430_ISA_110 110 |
2469cfa2 NC |
75 | #define MSP430_ISA_12 12 |
76 | #define MSP430_ISA_13 13 | |
77 | #define MSP430_ISA_14 14 | |
3b260895 NC |
78 | #define MSP430_ISA_15 15 |
79 | #define MSP430_ISA_16 16 | |
2469cfa2 NC |
80 | #define MSP430_ISA_31 31 |
81 | #define MSP430_ISA_32 32 | |
82 | #define MSP430_ISA_33 33 | |
3b260895 NC |
83 | #define MSP430_ISA_41 41 |
84 | #define MSP430_ISA_42 42 | |
2469cfa2 NC |
85 | #define MSP430_ISA_43 43 |
86 | #define MSP430_ISA_44 44 | |
2469cfa2 NC |
87 | |
88 | #define CHECK_RELOC_MSP430 ((imm_op || byte_op)?BFD_RELOC_MSP430_16_BYTE:BFD_RELOC_MSP430_16) | |
89 | #define CHECK_RELOC_MSP430_PCREL ((imm_op || byte_op)?BFD_RELOC_MSP430_16_PCREL_BYTE:BFD_RELOC_MSP430_16_PCREL) | |
90 | ||
91 | static struct mcu_type_s mcu_types[] = | |
92 | { | |
93 | {"msp1", MSP430_ISA_11, bfd_mach_msp11}, | |
94 | {"msp2", MSP430_ISA_14, bfd_mach_msp14}, | |
95 | {"msp430x110", MSP430_ISA_11, bfd_mach_msp11}, | |
96 | {"msp430x112", MSP430_ISA_11, bfd_mach_msp11}, | |
3b260895 NC |
97 | {"msp430x1101",MSP430_ISA_110, bfd_mach_msp110}, |
98 | {"msp430x1111",MSP430_ISA_110, bfd_mach_msp110}, | |
99 | {"msp430x1121",MSP430_ISA_110, bfd_mach_msp110}, | |
11d78a89 NC |
100 | {"msp430x1122",MSP430_ISA_11, bfd_mach_msp110}, |
101 | {"msp430x1132",MSP430_ISA_11, bfd_mach_msp110}, | |
3b260895 NC |
102 | |
103 | {"msp430x122", MSP430_ISA_12, bfd_mach_msp12}, | |
2469cfa2 | 104 | {"msp430x123", MSP430_ISA_12, bfd_mach_msp12}, |
3b260895 | 105 | {"msp430x1222",MSP430_ISA_12, bfd_mach_msp12}, |
2469cfa2 | 106 | {"msp430x1232",MSP430_ISA_12, bfd_mach_msp12}, |
3b260895 | 107 | |
2469cfa2 NC |
108 | {"msp430x133", MSP430_ISA_13, bfd_mach_msp13}, |
109 | {"msp430x135", MSP430_ISA_13, bfd_mach_msp13}, | |
3b260895 NC |
110 | {"msp430x1331",MSP430_ISA_13, bfd_mach_msp13}, |
111 | {"msp430x1351",MSP430_ISA_13, bfd_mach_msp13}, | |
2469cfa2 NC |
112 | {"msp430x147", MSP430_ISA_14, bfd_mach_msp14}, |
113 | {"msp430x148", MSP430_ISA_14, bfd_mach_msp14}, | |
114 | {"msp430x149", MSP430_ISA_14, bfd_mach_msp14}, | |
3b260895 NC |
115 | |
116 | {"msp430x155", MSP430_ISA_15, bfd_mach_msp15}, | |
117 | {"msp430x156", MSP430_ISA_15, bfd_mach_msp15}, | |
118 | {"msp430x157", MSP430_ISA_15, bfd_mach_msp15}, | |
119 | {"msp430x167", MSP430_ISA_16, bfd_mach_msp16}, | |
120 | {"msp430x168", MSP430_ISA_16, bfd_mach_msp16}, | |
121 | {"msp430x169", MSP430_ISA_16, bfd_mach_msp16}, | |
122 | ||
2469cfa2 NC |
123 | {"msp430x311", MSP430_ISA_31, bfd_mach_msp31}, |
124 | {"msp430x312", MSP430_ISA_31, bfd_mach_msp31}, | |
125 | {"msp430x313", MSP430_ISA_31, bfd_mach_msp31}, | |
126 | {"msp430x314", MSP430_ISA_31, bfd_mach_msp31}, | |
127 | {"msp430x315", MSP430_ISA_31, bfd_mach_msp31}, | |
128 | {"msp430x323", MSP430_ISA_32, bfd_mach_msp32}, | |
129 | {"msp430x325", MSP430_ISA_32, bfd_mach_msp32}, | |
130 | {"msp430x336", MSP430_ISA_33, bfd_mach_msp33}, | |
131 | {"msp430x337", MSP430_ISA_33, bfd_mach_msp33}, | |
3b260895 NC |
132 | |
133 | {"msp430x412", MSP430_ISA_41, bfd_mach_msp41}, | |
134 | {"msp430x413", MSP430_ISA_41, bfd_mach_msp41}, | |
135 | ||
136 | {"msp430xE423", MSP430_ISA_42, bfd_mach_msp42}, | |
137 | {"msp430xE425", MSP430_ISA_42, bfd_mach_msp42}, | |
138 | {"msp430xE427", MSP430_ISA_42, bfd_mach_msp42}, | |
139 | {"msp430xW423", MSP430_ISA_42, bfd_mach_msp42}, | |
140 | {"msp430xW425", MSP430_ISA_42, bfd_mach_msp42}, | |
141 | {"msp430xW427", MSP430_ISA_42, bfd_mach_msp42}, | |
142 | ||
2469cfa2 NC |
143 | {"msp430x435", MSP430_ISA_43, bfd_mach_msp43}, |
144 | {"msp430x436", MSP430_ISA_43, bfd_mach_msp43}, | |
11d78a89 | 145 | {"msp430x437", MSP430_ISA_43, bfd_mach_msp43}, |
2469cfa2 NC |
146 | {"msp430x447", MSP430_ISA_44, bfd_mach_msp44}, |
147 | {"msp430x448", MSP430_ISA_44, bfd_mach_msp44}, | |
148 | {"msp430x449", MSP430_ISA_44, bfd_mach_msp44}, | |
2469cfa2 NC |
149 | |
150 | {NULL, 0, 0} | |
151 | }; | |
152 | ||
153 | ||
154 | static struct mcu_type_s default_mcu = | |
155 | { "msp430x11", MSP430_ISA_11, bfd_mach_msp11 }; | |
156 | ||
157 | static struct mcu_type_s *msp430_mcu = &default_mcu; | |
158 | ||
159 | const pseudo_typeS md_pseudo_table[] = | |
160 | { | |
161 | {"arch", msp430_set_arch, 0}, | |
162 | {NULL, NULL, 0} | |
163 | }; | |
164 | ||
165 | #define OPTION_MMCU 'm' | |
166 | ||
167 | const char *md_shortopts = "m:"; | |
168 | ||
169 | struct option md_longopts[] = | |
170 | { | |
171 | {"mmcu", required_argument, NULL, OPTION_MMCU}, | |
172 | {NULL, no_argument, NULL, 0} | |
173 | }; | |
174 | ||
175 | size_t md_longopts_size = sizeof (md_longopts); | |
176 | ||
177 | static void | |
178 | show_mcu_list (stream) | |
179 | FILE *stream; | |
180 | { | |
181 | int i; | |
182 | ||
183 | fprintf (stream, _("Known MCU names:\n")); | |
184 | ||
185 | for (i = 0; mcu_types[i].name; i++) | |
186 | fprintf (stream, _("\t %s\n"), mcu_types[i].name); | |
187 | ||
188 | fprintf (stream, "\n"); | |
189 | } | |
190 | ||
191 | void | |
192 | md_show_usage (stream) | |
193 | FILE *stream; | |
194 | { | |
195 | fprintf (stream, | |
196 | _("MSP430 options:\n" | |
197 | " -mmcu=[msp430-name] select microcontroller type\n" | |
11d78a89 NC |
198 | " msp430x110 msp430x112\n" |
199 | " msp430x1101 msp430x1111\n" | |
200 | " msp430x1121 msp430x1122 msp430x1132\n" | |
201 | " msp430x122 msp430x123\n" | |
d2bf1bda NC |
202 | " msp430x1222 msp430x1232\n" |
203 | " msp430x133 msp430x135\n" | |
11d78a89 NC |
204 | " msp430x1331 msp430x1351\n" |
205 | " msp430x147 msp430x148 msp430x149\n" | |
206 | " msp430x155 msp430x156 msp430x157\n" | |
207 | " msp430x167 msp430x168 msp430x169\n" | |
208 | " msp430x311 msp430x312 msp430x313 msp430x314 msp430x315\n" | |
209 | " msp430x323 msp430x325\n" | |
210 | " msp430x336 msp430x337\n" | |
211 | " msp430x412 msp430x413\n" | |
3b260895 NC |
212 | " msp430xE423 msp430xE425 msp430E427\n" |
213 | " msp430xW423 msp430xW425 msp430W427\n" | |
11d78a89 NC |
214 | " msp430x435 msp430x436 msp430x437\n" |
215 | " msp430x447 msp430x448 msp430x449\n")); | |
2469cfa2 NC |
216 | |
217 | show_mcu_list (stream); | |
218 | } | |
219 | ||
220 | static char * | |
221 | extract_word (char *from, char *to, int limit) | |
222 | { | |
223 | char *op_start; | |
224 | char *op_end; | |
225 | int size = 0; | |
226 | ||
227 | /* Drop leading whitespace. */ | |
228 | from = skip_space (from); | |
229 | *to = 0; | |
230 | ||
231 | /* Find the op code end. */ | |
232 | for (op_start = op_end = from; *op_end != 0 && is_part_of_name (*op_end);) | |
233 | { | |
234 | to[size++] = *op_end++; | |
235 | if (size + 1 >= limit) | |
236 | break; | |
237 | } | |
238 | ||
239 | to[size] = 0; | |
240 | return op_end; | |
241 | } | |
242 | ||
243 | static void | |
244 | msp430_set_arch (dummy) | |
245 | int dummy ATTRIBUTE_UNUSED; | |
246 | { | |
247 | char *str = (char *) alloca (32); /* 32 for good measure. */ | |
248 | ||
249 | input_line_pointer = extract_word (input_line_pointer, str, 32); | |
250 | ||
251 | md_parse_option (OPTION_MMCU, str); | |
252 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach); | |
253 | } | |
254 | ||
255 | int | |
256 | md_parse_option (c, arg) | |
257 | int c; | |
258 | char *arg; | |
259 | { | |
260 | int i; | |
261 | ||
262 | switch (c) | |
263 | { | |
264 | case OPTION_MMCU: | |
265 | for (i = 0; mcu_types[i].name; ++i) | |
266 | if (strcmp (mcu_types[i].name, arg) == 0) | |
267 | break; | |
268 | ||
269 | if (!mcu_types[i].name) | |
270 | { | |
271 | show_mcu_list (stderr); | |
272 | as_fatal (_("unknown MCU: %s\n"), arg); | |
273 | } | |
274 | ||
275 | if (msp430_mcu == &default_mcu || msp430_mcu->mach == mcu_types[i].mach) | |
276 | msp430_mcu = &mcu_types[i]; | |
277 | else | |
278 | as_fatal (_("redefinition of mcu type %s' to %s'"), | |
279 | msp430_mcu->name, mcu_types[i].name); | |
280 | return 1; | |
281 | } | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
286 | symbolS * | |
287 | md_undefined_symbol (name) | |
288 | char *name ATTRIBUTE_UNUSED; | |
289 | { | |
290 | return 0; | |
291 | } | |
292 | ||
293 | static inline char * | |
294 | skip_space (s) | |
295 | char *s; | |
296 | { | |
297 | while (ISSPACE (*s)) | |
298 | ++s; | |
299 | return s; | |
300 | } | |
301 | ||
302 | /* Delete spaces from s: X ( r 1 2) => X(r12). */ | |
303 | ||
304 | static void | |
305 | del_spaces (s) | |
306 | char *s; | |
307 | { | |
308 | while (*s) | |
309 | { | |
310 | if (ISSPACE (*s)) | |
311 | { | |
312 | char *m = s + 1; | |
313 | ||
314 | while (ISSPACE (*m) && *m) | |
315 | m++; | |
316 | memmove (s, m, strlen (m) + 1); | |
317 | } | |
318 | else | |
319 | s++; | |
320 | } | |
321 | } | |
322 | ||
323 | /* Extract one word from FROM and copy it to TO. Delimeters are ",;\n" */ | |
324 | ||
325 | static char * | |
326 | extract_operand (char *from, char *to, int limit) | |
327 | { | |
328 | int size = 0; | |
329 | ||
330 | /* Drop leading whitespace. */ | |
331 | from = skip_space (from); | |
332 | ||
333 | while (size < limit && *from) | |
334 | { | |
335 | *(to + size) = *from; | |
336 | if (*from == ',' || *from == ';' || *from == '\n') | |
337 | break; | |
338 | from++; | |
339 | size++; | |
340 | } | |
341 | ||
342 | *(to + size) = 0; | |
343 | del_spaces (to); | |
344 | ||
345 | from++; | |
346 | ||
347 | return from; | |
348 | } | |
349 | ||
350 | static char * | |
351 | extract_cmd (char *from, char *to, int limit) | |
352 | { | |
353 | int size = 0; | |
354 | ||
355 | while (*from && ! ISSPACE (*from) && *from != '.' && limit > size) | |
356 | { | |
357 | *(to + size) = *from; | |
358 | from++; | |
359 | size++; | |
360 | } | |
361 | ||
362 | *(to + size) = 0; | |
363 | ||
364 | return from; | |
365 | } | |
366 | ||
367 | /* Turn a string in input_line_pointer into a floating point constant | |
368 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
369 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
370 | returned, or NULL on OK. */ | |
371 | ||
372 | char * | |
373 | md_atof (type, litP, sizeP) | |
374 | int type; | |
375 | char *litP; | |
376 | int *sizeP; | |
377 | { | |
378 | int prec; | |
379 | LITTLENUM_TYPE words[4]; | |
380 | LITTLENUM_TYPE *wordP; | |
381 | char *t; | |
382 | ||
383 | switch (type) | |
384 | { | |
385 | case 'f': | |
386 | prec = 2; | |
387 | break; | |
388 | case 'd': | |
389 | prec = 4; | |
390 | break; | |
391 | default: | |
392 | *sizeP = 0; | |
393 | return _("bad call to md_atof"); | |
394 | } | |
395 | ||
396 | t = atof_ieee (input_line_pointer, type, words); | |
397 | if (t) | |
398 | input_line_pointer = t; | |
399 | ||
400 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
401 | ||
402 | /* This loop outputs the LITTLENUMs in REVERSE order. */ | |
403 | for (wordP = words + prec - 1; prec--;) | |
404 | { | |
405 | md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); | |
406 | litP += sizeof (LITTLENUM_TYPE); | |
407 | } | |
408 | ||
409 | return NULL; | |
410 | } | |
411 | ||
412 | void | |
413 | md_convert_frag (abfd, sec, fragP) | |
414 | bfd *abfd ATTRIBUTE_UNUSED; | |
415 | asection *sec ATTRIBUTE_UNUSED; | |
416 | fragS *fragP ATTRIBUTE_UNUSED; | |
417 | { | |
418 | abort (); | |
419 | } | |
420 | ||
421 | void | |
422 | md_begin () | |
423 | { | |
424 | struct msp430_opcode_s *opcode; | |
425 | msp430_hash = hash_new (); | |
426 | ||
427 | for (opcode = msp430_opcodes; opcode->name; opcode++) | |
428 | hash_insert (msp430_hash, opcode->name, (char *) opcode); | |
429 | ||
430 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach); | |
431 | } | |
432 | ||
433 | void | |
434 | md_assemble (str) | |
435 | char *str; | |
436 | { | |
437 | struct msp430_opcode_s *opcode; | |
438 | char cmd[32]; | |
439 | unsigned int i = 0; | |
440 | ||
441 | str = skip_space (str); /* Skip leading spaces. */ | |
442 | str = extract_cmd (str, cmd, sizeof (cmd)); | |
443 | ||
444 | while (cmd[i] && i < sizeof (cmd)) | |
445 | { | |
df25fda5 | 446 | char a = TOLOWER (cmd[i]); |
2469cfa2 NC |
447 | cmd[i] = a; |
448 | i++; | |
449 | } | |
450 | ||
451 | if (!cmd[0]) | |
452 | { | |
453 | as_bad (_("can't find opcode ")); | |
454 | return; | |
455 | } | |
456 | ||
457 | opcode = (struct msp430_opcode_s *) hash_find (msp430_hash, cmd); | |
458 | ||
459 | if (opcode == NULL) | |
460 | { | |
461 | as_bad (_("unknown opcode `%s'"), cmd); | |
462 | return; | |
463 | } | |
464 | ||
465 | { | |
466 | char *__t = input_line_pointer; | |
467 | msp430_operands (opcode, str); | |
468 | input_line_pointer = __t; | |
469 | } | |
470 | } | |
471 | ||
472 | /* Parse instruction operands. | |
473 | Return binary opcode. */ | |
474 | ||
475 | static unsigned int | |
476 | msp430_operands (opcode, line) | |
477 | struct msp430_opcode_s *opcode; | |
478 | char *line; | |
479 | { | |
480 | int bin = opcode->bin_opcode; /* opcode mask. */ | |
481 | int __is; | |
482 | char l1[MAX_OP_LEN], l2[MAX_OP_LEN]; | |
483 | char *frag; | |
484 | int where; | |
485 | struct msp430_operand_s op1, op2; | |
486 | int res = 0; | |
487 | static short ZEROS = 0; | |
488 | int byte_op, imm_op; | |
489 | ||
490 | /* opcode is the one from opcodes table | |
491 | line contains something like | |
492 | [.w] @r2+, 5(R1) | |
493 | or | |
494 | .b @r2+, 5(R1). */ | |
495 | ||
496 | /* Check if byte or word operation. */ | |
df25fda5 | 497 | if (*line == '.' && TOLOWER (*(line + 1)) == 'b') |
2469cfa2 NC |
498 | { |
499 | bin |= BYTE_OPERATION; | |
500 | byte_op = 1; | |
501 | } | |
502 | else | |
503 | byte_op = 0; | |
504 | ||
505 | /* skip .[bwBW]. */ | |
506 | while (! ISSPACE (*line) && *line) | |
507 | line++; | |
508 | ||
509 | if (opcode->insn_opnumb && (!*line || *line == '\n')) | |
510 | { | |
511 | as_bad (_("instruction %s requires %d operand(s)"), | |
512 | opcode->name, opcode->insn_opnumb); | |
513 | return 0; | |
514 | } | |
515 | ||
516 | memset (l1, 0, sizeof (l1)); | |
517 | memset (l2, 0, sizeof (l2)); | |
518 | memset (&op1, 0, sizeof (op1)); | |
519 | memset (&op2, 0, sizeof (op2)); | |
520 | ||
521 | imm_op = 0; | |
522 | ||
523 | switch (opcode->fmt) | |
524 | { | |
525 | case 0: /* Emulated. */ | |
526 | switch (opcode->insn_opnumb) | |
527 | { | |
528 | case 0: | |
529 | /* Set/clear bits instructions. */ | |
530 | __is = 2; | |
531 | frag = frag_more (__is); | |
532 | bfd_putl16 ((bfd_vma) bin, frag); | |
533 | break; | |
534 | case 1: | |
535 | /* Something which works with destination operand. */ | |
536 | line = extract_operand (line, l1, sizeof (l1)); | |
537 | res = msp430_dstoperand (&op1, l1, opcode->bin_opcode); | |
538 | if (res) | |
539 | break; | |
540 | ||
541 | bin |= (op1.reg | (op1.am << 7)); | |
542 | __is = 1 + op1.ol; | |
543 | frag = frag_more (2 * __is); | |
544 | where = frag - frag_now->fr_literal; | |
545 | bfd_putl16 ((bfd_vma) bin, frag); | |
546 | ||
547 | if (op1.mode == OP_EXP) | |
548 | { | |
549 | where += 2; | |
550 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
551 | ||
552 | if (op1.reg) | |
553 | fix_new_exp (frag_now, where, 2, | |
554 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
555 | else | |
556 | fix_new_exp (frag_now, where, 2, | |
557 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
558 | } | |
559 | break; | |
560 | ||
561 | case 2: | |
562 | { | |
563 | char l2[16]; | |
564 | ||
565 | /* Shift instruction. */ | |
566 | line = extract_operand (line, l1, sizeof (l1)); | |
567 | strncpy (l2, l1, 16); | |
568 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op); | |
569 | res += msp430_dstoperand (&op2, l2, opcode->bin_opcode); | |
570 | ||
571 | if (res) | |
572 | break; /* An error occured. All warnings were done before. */ | |
573 | ||
574 | bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7)); | |
575 | ||
576 | __is = 1 + op1.ol + op2.ol; /* insn size in words. */ | |
577 | frag = frag_more (2 * __is); | |
578 | where = frag - frag_now->fr_literal; | |
579 | bfd_putl16 ((bfd_vma) bin, frag); | |
580 | ||
581 | if (op1.mode == OP_EXP) | |
582 | { | |
583 | where += 2; /* Advance 'where' as we do not know _where_. */ | |
584 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
585 | ||
586 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ | |
587 | fix_new_exp (frag_now, where, 2, | |
588 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
589 | else | |
590 | fix_new_exp (frag_now, where, 2, | |
591 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
592 | } | |
593 | ||
594 | if (op2.mode == OP_EXP) | |
595 | { | |
596 | imm_op = 0; | |
597 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0)); | |
598 | ||
599 | if (op2.reg) /* Not PC relative. */ | |
600 | fix_new_exp (frag_now, where + 2, 2, | |
601 | &(op2.exp), FALSE, CHECK_RELOC_MSP430); | |
602 | else | |
603 | fix_new_exp (frag_now, where + 2, 2, | |
604 | &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
605 | } | |
606 | break; | |
607 | } | |
608 | case 3: | |
609 | /* Branch instruction => mov dst, r0. */ | |
610 | line = extract_operand (line, l1, sizeof (l1)); | |
611 | ||
612 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op); | |
613 | if (res) | |
614 | break; | |
615 | ||
616 | byte_op = 0; | |
617 | imm_op = 0; | |
618 | ||
619 | bin |= ((op1.reg << 8) | (op1.am << 4)); | |
620 | __is = 1 + op1.ol; | |
621 | frag = frag_more (2 * __is); | |
622 | where = frag - frag_now->fr_literal; | |
623 | bfd_putl16 ((bfd_vma) bin, frag); | |
624 | ||
625 | if (op1.mode == OP_EXP) | |
626 | { | |
627 | where += 2; | |
628 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
629 | ||
630 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) | |
631 | fix_new_exp (frag_now, where, 2, | |
632 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
633 | else | |
634 | fix_new_exp (frag_now, where, 2, | |
635 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
636 | } | |
637 | break; | |
638 | } | |
639 | break; | |
640 | ||
641 | case 1: /* Format 1, double operand. */ | |
642 | line = extract_operand (line, l1, sizeof (l1)); | |
643 | line = extract_operand (line, l2, sizeof (l2)); | |
644 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op); | |
645 | res += msp430_dstoperand (&op2, l2, opcode->bin_opcode); | |
646 | ||
647 | if (res) | |
648 | break; /* Error occured. All warnings were done before. */ | |
649 | ||
650 | bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7)); | |
651 | ||
652 | __is = 1 + op1.ol + op2.ol; /* insn size in words. */ | |
653 | frag = frag_more (2 * __is); | |
654 | where = frag - frag_now->fr_literal; | |
655 | bfd_putl16 ((bfd_vma) bin, frag); | |
656 | ||
657 | if (op1.mode == OP_EXP) | |
658 | { | |
659 | where += 2; /* Advance where as we do not know _where_. */ | |
660 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
661 | ||
662 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ | |
663 | fix_new_exp (frag_now, where, 2, | |
664 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
665 | else | |
666 | fix_new_exp (frag_now, where, 2, | |
667 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
668 | } | |
669 | ||
670 | if (op2.mode == OP_EXP) | |
671 | { | |
672 | imm_op = 0; | |
673 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0)); | |
674 | ||
675 | if (op2.reg) /* Not PC relative. */ | |
676 | fix_new_exp (frag_now, where + 2, 2, | |
677 | &(op2.exp), FALSE, CHECK_RELOC_MSP430); | |
678 | else | |
679 | fix_new_exp (frag_now, where + 2, 2, | |
680 | &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
681 | } | |
682 | break; | |
683 | ||
684 | case 2: /* Single-operand mostly instr. */ | |
685 | if (opcode->insn_opnumb == 0) | |
686 | { | |
687 | /* reti instruction. */ | |
688 | frag = frag_more (2); | |
689 | bfd_putl16 ((bfd_vma) bin, frag); | |
690 | break; | |
691 | } | |
692 | ||
693 | line = extract_operand (line, l1, sizeof (l1)); | |
694 | res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op); | |
695 | if (res) | |
696 | break; /* Error in operand. */ | |
697 | ||
698 | bin |= op1.reg | (op1.am << 4); | |
699 | __is = 1 + op1.ol; | |
700 | frag = frag_more (2 * __is); | |
701 | where = frag - frag_now->fr_literal; | |
702 | bfd_putl16 ((bfd_vma) bin, frag); | |
703 | ||
704 | if (op1.mode == OP_EXP) | |
705 | { | |
706 | bfd_putl16 ((bfd_vma) ZEROS, frag + 2); | |
707 | ||
708 | if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */ | |
709 | fix_new_exp (frag_now, where + 2, 2, | |
710 | &(op1.exp), FALSE, CHECK_RELOC_MSP430); | |
711 | else | |
712 | fix_new_exp (frag_now, where + 2, 2, | |
713 | &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL); | |
714 | } | |
715 | break; | |
716 | ||
717 | case 3: /* Conditional jumps instructions. */ | |
718 | line = extract_operand (line, l1, sizeof (l1)); | |
719 | /* l1 is a label. */ | |
720 | if (l1[0]) | |
721 | { | |
722 | char *m = l1; | |
723 | expressionS exp; | |
724 | ||
725 | if (*m == '$') | |
726 | m++; | |
727 | ||
728 | parse_exp (m, &exp); | |
729 | frag = frag_more (2); /* Instr size is 1 word. */ | |
730 | ||
731 | /* In order to handle something like: | |
732 | ||
733 | and #0x8000, r5 | |
734 | tst r5 | |
735 | jz 4 ; skip next 4 bytes | |
736 | inv r5 | |
737 | inc r5 | |
738 | nop ; will jump here if r5 positive or zero | |
739 | ||
740 | jCOND -n ;assumes jump n bytes backward: | |
741 | ||
742 | mov r5,r6 | |
743 | jmp -2 | |
744 | ||
745 | is equial to: | |
746 | lab: | |
747 | mov r5,r6 | |
748 | jmp lab | |
749 | ||
750 | jCOND $n ; jump from PC in either direction. */ | |
751 | ||
752 | if (exp.X_op == O_constant) | |
753 | { | |
754 | int x = exp.X_add_number; | |
755 | ||
756 | if (x & 1) | |
757 | { | |
758 | as_warn (_("Even number required. Rounded to %d"), x + 1); | |
759 | x++; | |
760 | } | |
761 | ||
762 | if ((*l1 == '$' && x > 0) || x < 0) | |
763 | x -= 2; | |
764 | ||
765 | x >>= 1; | |
766 | ||
767 | if (x > 512 || x < -511) | |
768 | { | |
769 | as_bad (_("Wrong displacement %d"), x << 1); | |
770 | break; | |
771 | } | |
772 | ||
773 | bin |= x & 0x3ff; | |
774 | bfd_putl16 ((bfd_vma) bin, frag); | |
775 | } | |
776 | else if (exp.X_op == O_symbol && *l1 != '$') | |
777 | { | |
778 | where = frag - frag_now->fr_literal; | |
779 | fix_new_exp (frag_now, where, 2, | |
780 | &exp, TRUE, BFD_RELOC_MSP430_10_PCREL); | |
781 | ||
782 | bfd_putl16 ((bfd_vma) bin, frag); | |
783 | } | |
784 | else if (*l1 == '$') | |
785 | { | |
786 | as_bad (_("instruction requires label sans '$'")); | |
787 | break; | |
788 | } | |
789 | else | |
790 | { | |
791 | as_bad (_ | |
792 | ("instruction requires label or value in range -511:512")); | |
793 | break; | |
794 | } | |
795 | } | |
796 | else | |
797 | { | |
798 | as_bad (_("instruction requires label")); | |
799 | break; | |
800 | } | |
801 | break; | |
802 | ||
803 | default: | |
804 | as_bad (_("Ilegal instruction or not implmented opcode.")); | |
805 | } | |
806 | ||
807 | input_line_pointer = line; | |
808 | return 0; | |
809 | } | |
810 | ||
811 | static int | |
812 | msp430_dstoperand (op, l, bin) | |
813 | struct msp430_operand_s *op; | |
814 | char *l; | |
815 | int bin; | |
816 | { | |
817 | int dummy; | |
818 | int ret = msp430_srcoperand (op, l, bin, &dummy); | |
819 | if (ret) | |
820 | return ret; | |
821 | ||
822 | if (op->am == 2) | |
823 | { | |
824 | char *__tl = "0"; | |
825 | ||
826 | op->mode = OP_EXP; | |
827 | op->am = 1; | |
828 | op->ol = 1; | |
829 | parse_exp (__tl, &(op->exp)); | |
830 | if (op->exp.X_op != O_constant || op->exp.X_add_number != 0) | |
831 | { | |
832 | as_bad (_("Internal bug. Try to use 0(r%d) instead of @r%d"), | |
833 | op->reg, op->reg); | |
834 | return 1; | |
835 | } | |
836 | return 0; | |
837 | } | |
838 | ||
839 | if (op->am > 1) | |
840 | { | |
841 | as_bad (_ | |
842 | ("this addressing mode is not applicable for destination operand")); | |
843 | return 1; | |
844 | } | |
845 | return 0; | |
846 | } | |
847 | ||
848 | ||
849 | static int | |
850 | check_reg (t) | |
851 | char *t; | |
852 | { | |
853 | /* If this is a reg numb, str 't' must be a number from 0 - 15. */ | |
854 | ||
855 | if (strlen (t) > 2 && *(t + 2) != '+') | |
856 | return 1; | |
857 | ||
858 | while (*t) | |
859 | { | |
860 | if ((*t < '0' || *t > '9') && *t != '+') | |
861 | break; | |
862 | t++; | |
863 | } | |
864 | ||
865 | if (*t) | |
866 | return 1; | |
867 | ||
868 | return 0; | |
869 | } | |
870 | ||
871 | ||
872 | static int | |
873 | msp430_srcoperand (op, l, bin, imm_op) | |
874 | struct msp430_operand_s *op; | |
875 | char *l; | |
876 | int bin; | |
877 | int *imm_op; | |
878 | { | |
879 | char *__tl = l; | |
880 | ||
881 | /* Check if an immediate #VALUE. The hash sign should be only at the beginning! */ | |
882 | if (*l == '#') | |
883 | { | |
884 | char *h = l; | |
885 | int vshift = -1; | |
886 | int rval = 0; | |
887 | ||
888 | /* Check if there is: | |
889 | llo(x) - least significant 16 bits, x &= 0xffff | |
890 | lhi(x) - x = (x >> 16) & 0xffff, | |
891 | hlo(x) - x = (x >> 32) & 0xffff, | |
892 | hhi(x) - x = (x >> 48) & 0xffff | |
893 | The value _MUST_ be constant expression: #hlo(1231231231). */ | |
894 | ||
895 | *imm_op = 1; | |
896 | ||
897 | if (strncasecmp (h, "#llo(", 5) == 0) | |
898 | { | |
899 | vshift = 0; | |
900 | rval = 3; | |
901 | } | |
902 | else if (strncasecmp (h, "#lhi(", 5) == 0) | |
903 | { | |
904 | vshift = 1; | |
905 | rval = 3; | |
906 | } | |
907 | else if (strncasecmp (h, "#hlo(", 5) == 0) | |
908 | { | |
909 | vshift = 2; | |
910 | rval = 3; | |
911 | } | |
912 | else if (strncasecmp (h, "#hhi(", 5) == 0) | |
913 | { | |
914 | vshift = 3; | |
915 | rval = 3; | |
916 | } | |
917 | else if (strncasecmp (h, "#lo(", 4) == 0) | |
918 | { | |
919 | vshift = 0; | |
920 | rval = 2; | |
921 | } | |
922 | else if (strncasecmp (h, "#hi(", 4) == 0) | |
923 | { | |
924 | vshift = 1; | |
925 | rval = 2; | |
926 | } | |
927 | ||
928 | op->reg = 0; /* Reg PC. */ | |
929 | op->am = 3; | |
930 | op->ol = 1; /* Immediate will follow an instruction. */ | |
931 | __tl = h + 1 + rval; | |
932 | op->mode = OP_EXP; | |
933 | parse_exp (__tl, &(op->exp)); | |
934 | if (op->exp.X_op == O_constant) | |
935 | { | |
936 | int x = op->exp.X_add_number; | |
937 | ||
938 | if (vshift == 0) | |
939 | { | |
940 | x = x & 0xffff; | |
941 | op->exp.X_add_number = x; | |
942 | } | |
943 | else if (vshift == 1) | |
944 | { | |
945 | x = (x >> 16) & 0xffff; | |
946 | op->exp.X_add_number = x; | |
947 | } | |
948 | else if (vshift > 1) | |
949 | { | |
950 | if (x < 0) | |
951 | op->exp.X_add_number = -1; | |
952 | else | |
953 | op->exp.X_add_number = 0; /* Nothing left. */ | |
954 | x = op->exp.X_add_number; | |
955 | } | |
956 | ||
957 | if (op->exp.X_add_number > 65535 || op->exp.X_add_number < -32768) | |
958 | { | |
959 | as_bad (_("value %ld out of range. Use #lo() or #hi()"), x); | |
960 | return 1; | |
961 | } | |
962 | ||
963 | /* Now check constants. */ | |
964 | /* Substitude register mode with a constant generator if applicable. */ | |
965 | ||
966 | x = (short) x; /* Extend sign. */ | |
967 | ||
968 | if (x == 0) | |
969 | { | |
970 | op->reg = 3; | |
971 | op->am = 0; | |
972 | op->ol = 0; | |
973 | op->mode = OP_REG; | |
974 | } | |
975 | else if (x == 1) | |
976 | { | |
977 | op->reg = 3; | |
978 | op->am = 1; | |
979 | op->ol = 0; | |
980 | op->mode = OP_REG; | |
981 | } | |
982 | else if (x == 2) | |
983 | { | |
984 | op->reg = 3; | |
985 | op->am = 2; | |
986 | op->ol = 0; | |
987 | op->mode = OP_REG; | |
988 | } | |
989 | else if (x == -1) | |
990 | { | |
991 | op->reg = 3; | |
992 | op->am = 3; | |
993 | op->ol = 0; | |
994 | op->mode = OP_REG; | |
995 | } | |
996 | else if (x == 4) | |
997 | { | |
998 | #ifdef PUSH_1X_WORKAROUND | |
20977673 | 999 | if (bin == 0x1200) |
2469cfa2 NC |
1000 | { |
1001 | /* Remove warning as confusing. | |
1002 | as_warn(_("Hardware push bug workaround")); */ | |
1003 | } | |
1004 | else | |
1005 | #endif | |
1006 | { | |
1007 | op->reg = 2; | |
1008 | op->am = 2; | |
1009 | op->ol = 0; | |
1010 | op->mode = OP_REG; | |
1011 | } | |
1012 | } | |
1013 | else if (x == 8) | |
1014 | { | |
1015 | #ifdef PUSH_1X_WORKAROUND | |
20977673 | 1016 | if (bin == 0x1200) |
2469cfa2 NC |
1017 | { |
1018 | /* Remove warning as confusing. | |
1019 | as_warn(_("Hardware push bug workaround")); */ | |
1020 | } | |
1021 | else | |
1022 | #endif | |
1023 | { | |
1024 | op->reg = 2; | |
1025 | op->am = 3; | |
1026 | op->ol = 0; | |
1027 | op->mode = OP_REG; | |
1028 | } | |
1029 | } | |
1030 | } | |
1031 | else if (op->exp.X_op == O_symbol) | |
1032 | { | |
1033 | op->mode = OP_EXP; | |
1034 | } | |
1035 | else if (op->exp.X_op == O_big) | |
1036 | { | |
1037 | short x; | |
1038 | if (vshift != -1) | |
1039 | { | |
1040 | op->exp.X_op = O_constant; | |
1041 | op->exp.X_add_number = 0xffff & generic_bignum[vshift]; | |
1042 | x = op->exp.X_add_number; | |
1043 | } | |
1044 | else | |
1045 | { | |
1046 | as_bad (_ | |
1047 | ("unknown expression in operand %s. use #llo() #lhi() #hlo() #hhi() "), | |
1048 | l); | |
1049 | return 1; | |
1050 | } | |
1051 | ||
1052 | if (x == 0) | |
1053 | { | |
1054 | op->reg = 3; | |
1055 | op->am = 0; | |
1056 | op->ol = 0; | |
1057 | op->mode = OP_REG; | |
1058 | } | |
1059 | else if (x == 1) | |
1060 | { | |
1061 | op->reg = 3; | |
1062 | op->am = 1; | |
1063 | op->ol = 0; | |
1064 | op->mode = OP_REG; | |
1065 | } | |
1066 | else if (x == 2) | |
1067 | { | |
1068 | op->reg = 3; | |
1069 | op->am = 2; | |
1070 | op->ol = 0; | |
1071 | op->mode = OP_REG; | |
1072 | } | |
1073 | else if (x == -1) | |
1074 | { | |
1075 | op->reg = 3; | |
1076 | op->am = 3; | |
1077 | op->ol = 0; | |
1078 | op->mode = OP_REG; | |
1079 | } | |
1080 | else if (x == 4) | |
1081 | { | |
1082 | op->reg = 2; | |
1083 | op->am = 2; | |
1084 | op->ol = 0; | |
1085 | op->mode = OP_REG; | |
1086 | } | |
1087 | else if (x == 8) | |
1088 | { | |
1089 | op->reg = 2; | |
1090 | op->am = 3; | |
1091 | op->ol = 0; | |
1092 | op->mode = OP_REG; | |
1093 | } | |
1094 | } | |
1095 | else | |
1096 | { | |
1097 | as_bad (_("unknown operand %s"), l); | |
1098 | } | |
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | /* Check if absolute &VALUE (assume that we can construct something like ((a&b)<<7 + 25). */ | |
1103 | if (*l == '&') | |
1104 | { | |
1105 | char *h = l; | |
1106 | ||
1107 | op->reg = 2; /* reg 2 in absolute addr mode. */ | |
1108 | op->am = 1; /* mode As == 01 bin. */ | |
1109 | op->ol = 1; /* Immediate value followed by instruction. */ | |
1110 | __tl = h + 1; | |
1111 | parse_exp (__tl, &(op->exp)); | |
1112 | op->mode = OP_EXP; | |
1113 | if (op->exp.X_op == O_constant) | |
1114 | { | |
1115 | int x = op->exp.X_add_number; | |
1116 | if (x > 65535 || x < -32768) | |
1117 | { | |
1118 | as_bad (_("value out of range: %d"), x); | |
1119 | return 1; | |
1120 | } | |
1121 | } | |
1122 | else if (op->exp.X_op == O_symbol) | |
1123 | { | |
1124 | } | |
1125 | else | |
1126 | { | |
1127 | as_bad (_("unknown expression in operand %s"), l); | |
1128 | return 1; | |
1129 | } | |
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | /* Check if inderect register mode @Rn / postincrement @Rn+. */ | |
1134 | if (*l == '@') | |
1135 | { | |
1136 | char *t = l; | |
1137 | char *m = strchr (l, '+'); | |
1138 | ||
1139 | if (t != l) | |
1140 | { | |
1141 | as_bad (_("unknown addressing mode %s"), l); | |
1142 | return 1; | |
1143 | } | |
1144 | ||
1145 | t++; | |
1146 | if (*t != 'r' && *t != 'R') | |
1147 | { | |
1148 | as_bad (_("unknown addressing mode %s"), l); | |
1149 | return 1; | |
1150 | } | |
1151 | ||
1152 | t++; /* Points to the reg value. */ | |
1153 | ||
1154 | if (check_reg (t)) | |
1155 | { | |
1156 | as_bad (_("Bad register name r%s"), t); | |
1157 | return 1; | |
1158 | } | |
1159 | ||
1160 | op->mode = OP_REG; | |
1161 | op->am = m ? 3 : 2; | |
1162 | op->ol = 0; | |
1163 | if (m) | |
1164 | *m = 0; /* strip '+' */ | |
1165 | op->reg = atoi (t); | |
1166 | if (op->reg < 0 || op->reg > 15) | |
1167 | { | |
1168 | as_bad (_("MSP430 does not have %d registers"), op->reg); | |
1169 | return 1; | |
1170 | } | |
1171 | ||
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | /* Check if register indexed X(Rn). */ | |
1176 | do | |
1177 | { | |
1178 | char *h = strrchr (l, '('); | |
1179 | char *m = strrchr (l, ')'); | |
1180 | char *t; | |
1181 | ||
1182 | *imm_op = 1; | |
1183 | ||
1184 | if (!h) | |
1185 | break; | |
1186 | if (!m) | |
1187 | { | |
1188 | as_bad (_("')' required")); | |
1189 | return 1; | |
1190 | } | |
1191 | ||
1192 | t = h; | |
1193 | op->am = 1; | |
1194 | op->ol = 1; | |
1195 | /* Extract a register. */ | |
1196 | t++; /* Advance pointer. */ | |
1197 | ||
1198 | if (*t != 'r' && *t != 'R') | |
1199 | { | |
1200 | as_bad (_ | |
1201 | ("unknown operator %s. Did you mean X(Rn) or #[hl][hl][oi](CONST) ?"), | |
1202 | l); | |
1203 | return 1; | |
1204 | } | |
1205 | t++; | |
1206 | ||
1207 | op->reg = *t - '0'; | |
1208 | if (op->reg > 9 || op->reg < 0) | |
1209 | { | |
1210 | as_bad (_("unknown operator (r%s substituded as a register name"), | |
1211 | t); | |
1212 | return 1; | |
1213 | } | |
1214 | t++; | |
1215 | if (*t != ')') | |
1216 | { | |
1217 | op->reg = op->reg * 10; | |
1218 | op->reg += *t - '0'; | |
1219 | ||
1220 | if (op->reg > 15) | |
1221 | { | |
1222 | as_bad (_("unknown operator %s"), l); | |
1223 | return 1; | |
1224 | } | |
1225 | if (op->reg == 2) | |
1226 | { | |
1227 | as_bad (_("r2 should not be used in indexed addressing mode")); | |
1228 | return 1; | |
1229 | } | |
1230 | ||
1231 | if (*(t + 1) != ')') | |
1232 | { | |
1233 | as_bad (_("unknown operator %s"), l); | |
1234 | return 1; | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | /* Extract constant. */ | |
1239 | __tl = l; | |
1240 | *h = 0; | |
1241 | op->mode = OP_EXP; | |
1242 | parse_exp (__tl, &(op->exp)); | |
1243 | if (op->exp.X_op == O_constant) | |
1244 | { | |
1245 | int x = op->exp.X_add_number; | |
1246 | ||
1247 | if (x > 65535 || x < -32768) | |
1248 | { | |
1249 | as_bad (_("value out of range: %d"), x); | |
1250 | return 1; | |
1251 | } | |
1252 | ||
1253 | if (x == 0) | |
1254 | { | |
1255 | op->mode = OP_REG; | |
1256 | op->am = 2; | |
1257 | op->ol = 0; | |
1258 | return 0; | |
1259 | } | |
1260 | } | |
1261 | else if (op->exp.X_op == O_symbol) | |
1262 | { | |
1263 | } | |
1264 | else | |
1265 | { | |
1266 | as_bad (_("unknown expression in operand %s"), l); | |
1267 | return 1; | |
1268 | } | |
1269 | ||
1270 | return 0; | |
1271 | } | |
1272 | while (0); | |
1273 | ||
1274 | /* Register mode 'mov r1,r2'. */ | |
1275 | do | |
1276 | { | |
1277 | char *t = l; | |
1278 | ||
1279 | /* Operand should be a register. */ | |
1280 | if (*t == 'r' || *t == 'R') | |
1281 | { | |
1282 | int x = atoi (t + 1); | |
1283 | ||
1284 | if (check_reg (t + 1)) | |
1285 | break; | |
1286 | ||
1287 | if (x < 0 || x > 15) | |
1288 | break; /* Symbolic mode. */ | |
1289 | ||
1290 | op->mode = OP_REG; | |
1291 | op->am = 0; | |
1292 | op->ol = 0; | |
1293 | op->reg = x; | |
1294 | return 0; | |
1295 | } | |
1296 | } | |
1297 | while (0); | |
1298 | ||
1299 | /* Symbolic mode 'mov a, b' == 'mov x(pc), y(pc)'. */ | |
1300 | do | |
1301 | { | |
1302 | char *t = l; | |
1303 | ||
1304 | __tl = l; | |
1305 | ||
1306 | while (*t) | |
1307 | { | |
1308 | /* alpha/number underline dot for labels. */ | |
1309 | if (! ISALNUM (*t) && *t != '_' && *t != '.') | |
1310 | { | |
1311 | as_bad (_("unknown operand %s"), l); | |
1312 | return 1; | |
1313 | } | |
1314 | t++; | |
1315 | } | |
1316 | ||
1317 | op->mode = OP_EXP; | |
1318 | op->reg = 0; /* PC relative... be careful. */ | |
1319 | op->am = 1; | |
1320 | op->ol = 1; | |
1321 | __tl = l; | |
1322 | parse_exp (__tl, &(op->exp)); | |
1323 | return 0; | |
1324 | } | |
1325 | while (0); | |
1326 | ||
1327 | /* Unreachable. */ | |
1328 | as_bad (_("unknown addressing mode for operand %s"), l); | |
1329 | return 1; | |
1330 | } | |
1331 | ||
1332 | ||
1333 | /* GAS will call this function for each section at the end of the assembly, | |
1334 | to permit the CPU backend to adjust the alignment of a section. */ | |
1335 | ||
1336 | valueT | |
1337 | md_section_align (seg, addr) | |
1338 | asection *seg; | |
1339 | valueT addr; | |
1340 | { | |
1341 | int align = bfd_get_section_alignment (stdoutput, seg); | |
1342 | ||
1343 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
1344 | } | |
1345 | ||
1346 | /* If you define this macro, it should return the offset between the | |
1347 | address of a PC relative fixup and the position from which the PC | |
1348 | relative adjustment should be made. On many processors, the base | |
1349 | of a PC relative instruction is the next instruction, so this | |
1350 | macro would return the length of an instruction. */ | |
1351 | ||
1352 | long | |
1353 | md_pcrel_from_section (fixp, sec) | |
1354 | fixS *fixp; | |
1355 | segT sec; | |
1356 | { | |
1357 | if (fixp->fx_addsy != (symbolS *) NULL | |
1358 | && (!S_IS_DEFINED (fixp->fx_addsy) | |
1359 | || (S_GET_SEGMENT (fixp->fx_addsy) != sec))) | |
1360 | return 0; | |
1361 | ||
1362 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
1363 | } | |
1364 | ||
1365 | /* GAS will call this for each fixup. It should store the correct | |
1366 | value in the object file. */ | |
1367 | ||
1368 | void | |
1369 | md_apply_fix3 (fixp, valuep, seg) | |
1370 | fixS *fixp; | |
1371 | valueT *valuep; | |
1372 | segT seg; | |
1373 | { | |
1374 | unsigned char *where; | |
1375 | unsigned long insn; | |
1376 | long value; | |
1377 | ||
1378 | if (fixp->fx_addsy == (symbolS *) NULL) | |
1379 | { | |
1380 | value = *valuep; | |
1381 | fixp->fx_done = 1; | |
1382 | } | |
1383 | else if (fixp->fx_pcrel) | |
1384 | { | |
1385 | segT s = S_GET_SEGMENT (fixp->fx_addsy); | |
1386 | ||
1387 | if (fixp->fx_addsy && (s == seg || s == absolute_section)) | |
1388 | { | |
1389 | value = S_GET_VALUE (fixp->fx_addsy) + *valuep; | |
1390 | fixp->fx_done = 1; | |
1391 | } | |
1392 | else | |
1393 | value = *valuep; | |
1394 | } | |
1395 | else | |
1396 | { | |
1397 | value = fixp->fx_offset; | |
1398 | ||
1399 | if (fixp->fx_subsy != (symbolS *) NULL) | |
1400 | { | |
1401 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
1402 | { | |
1403 | value -= S_GET_VALUE (fixp->fx_subsy); | |
1404 | fixp->fx_done = 1; | |
1405 | } | |
1406 | else | |
1407 | { | |
1408 | /* We don't actually support subtracting a symbol. */ | |
1409 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1410 | _("expression too complex")); | |
1411 | } | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | switch (fixp->fx_r_type) | |
1416 | { | |
1417 | default: | |
1418 | fixp->fx_no_overflow = 1; | |
1419 | break; | |
1420 | case BFD_RELOC_MSP430_10_PCREL: | |
1421 | break; | |
1422 | } | |
1423 | ||
1424 | if (fixp->fx_done) | |
1425 | { | |
1426 | /* Fetch the instruction, insert the fully resolved operand | |
1427 | value, and stuff the instruction back again. */ | |
1428 | ||
1429 | where = fixp->fx_frag->fr_literal + fixp->fx_where; | |
1430 | ||
1431 | insn = bfd_getl16 (where); | |
1432 | ||
1433 | switch (fixp->fx_r_type) | |
1434 | { | |
1435 | case BFD_RELOC_MSP430_10_PCREL: | |
1436 | if (value & 1) | |
1437 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1438 | _("odd address operand: %ld"), value); | |
1439 | ||
1440 | /* Jumps are in words. */ | |
1441 | value >>= 1; | |
1442 | --value; /* Correct PC. */ | |
1443 | ||
1444 | if (value < -512 || value > 511) | |
1445 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1446 | _("operand out of range: %ld"), value); | |
1447 | ||
1448 | value &= 0x3ff; /* get rid of extended sign */ | |
1449 | bfd_putl16 ((bfd_vma) (value | insn), where); | |
1450 | break; | |
1451 | ||
1452 | case BFD_RELOC_MSP430_16_PCREL: | |
1453 | if (value & 1) | |
1454 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1455 | _("odd address operand: %ld"), value); | |
1456 | ||
1457 | /* Nothing to be corrected here. */ | |
1458 | if (value < -32768 || value > 65536) | |
1459 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1460 | _("operand out of range: %ld"), value); | |
1461 | ||
1462 | value &= 0xffff; /* Get rid of extended sign. */ | |
1463 | bfd_putl16 ((bfd_vma) value, where); | |
1464 | break; | |
1465 | ||
1466 | case BFD_RELOC_MSP430_16_PCREL_BYTE: | |
1467 | /* Nothing to be corrected here. */ | |
1468 | if (value < -32768 || value > 65536) | |
1469 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1470 | _("operand out of range: %ld"), value); | |
1471 | ||
1472 | value &= 0xffff; /* Get rid of extended sign. */ | |
1473 | bfd_putl16 ((bfd_vma) value, where); | |
1474 | break; | |
1475 | ||
1476 | case BFD_RELOC_32: | |
1477 | bfd_putl16 ((bfd_vma) value, where); | |
1478 | break; | |
1479 | ||
1480 | case BFD_RELOC_MSP430_16: | |
1481 | case BFD_RELOC_16: | |
1482 | case BFD_RELOC_MSP430_16_BYTE: | |
1483 | value &= 0xffff; | |
1484 | bfd_putl16 ((bfd_vma) value, where); | |
1485 | break; | |
1486 | ||
1487 | default: | |
1488 | as_fatal (_("line %d: unknown relocation type: 0x%x"), | |
1489 | fixp->fx_line, fixp->fx_r_type); | |
1490 | break; | |
1491 | } | |
1492 | } | |
1493 | else | |
1494 | { | |
1495 | fixp->fx_addnumber = value; | |
1496 | } | |
1497 | return; | |
1498 | } | |
1499 | ||
1500 | /* A `BFD_ASSEMBLER' GAS will call this to generate a reloc. GAS | |
1501 | will pass the resulting reloc to `bfd_install_relocation'. This | |
1502 | currently works poorly, as `bfd_install_relocation' often does the | |
1503 | wrong thing, and instances of `tc_gen_reloc' have been written to | |
1504 | work around the problems, which in turns makes it difficult to fix | |
1505 | `bfd_install_relocation'. */ | |
1506 | ||
1507 | /* If while processing a fixup, a reloc really needs to be created | |
1508 | then it is done here. */ | |
1509 | ||
1510 | arelent * | |
1511 | tc_gen_reloc (seg, fixp) | |
1512 | asection *seg ATTRIBUTE_UNUSED; | |
1513 | fixS *fixp; | |
1514 | { | |
1515 | arelent *reloc; | |
1516 | ||
1517 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
1518 | ||
1519 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
1520 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
1521 | ||
1522 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1523 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
1524 | if (reloc->howto == (reloc_howto_type *) NULL) | |
1525 | { | |
1526 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1527 | _("reloc %d not supported by object file format"), | |
1528 | (int) fixp->fx_r_type); | |
1529 | return NULL; | |
1530 | } | |
1531 | ||
1532 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
1533 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
1534 | reloc->address = fixp->fx_offset; | |
1535 | ||
1536 | reloc->addend = fixp->fx_offset; | |
1537 | ||
1538 | return reloc; | |
1539 | } | |
1540 | ||
1541 | /* Parse ordinary expression. */ | |
1542 | ||
1543 | static char * | |
1544 | parse_exp (s, op) | |
1545 | char *s; | |
1546 | expressionS *op; | |
1547 | { | |
1548 | input_line_pointer = s; | |
1549 | expression (op); | |
1550 | if (op->X_op == O_absent) | |
1551 | as_bad (_("missing operand")); | |
1552 | return input_line_pointer; | |
1553 | } | |
1554 | ||
1555 | ||
1556 | int | |
1557 | md_estimate_size_before_relax (fragp, seg) | |
1558 | fragS *fragp ATTRIBUTE_UNUSED; | |
1559 | asection *seg ATTRIBUTE_UNUSED; | |
1560 | { | |
1561 | abort (); | |
1562 | return 0; | |
1563 | } |