Commit | Line | Data |
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3f8107ab | 1 | /* tc-ft32.c -- Assemble code for ft32 |
219d1afa | 2 | Copyright (C) 2008-2018 Free Software Foundation, Inc. |
3f8107ab AM |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, | |
19 | Boston, MA 02110-1301, USA. */ | |
20 | ||
21 | /* Contributed by Anthony Green <green@spindazzle.org>. */ | |
22 | ||
23 | #include "as.h" | |
24 | #include "safe-ctype.h" | |
25 | #include "opcode/ft32.h" | |
26 | ||
27 | extern const ft32_opc_info_t ft32_opc_info[128]; | |
28 | ||
81b42bca JB |
29 | /* See md_parse_option() for meanings of these options. */ |
30 | static char norelax; /* True if -norelax switch seen. */ | |
31 | ||
3f8107ab AM |
32 | const char comment_chars[] = "#"; |
33 | const char line_separator_chars[] = ";"; | |
34 | const char line_comment_chars[] = "#"; | |
35 | ||
36 | static int pending_reloc; | |
37 | static struct hash_control *opcode_hash_control; | |
38 | ||
39 | static valueT md_chars_to_number (char * buf, int n); | |
40 | ||
41 | const pseudo_typeS md_pseudo_table[] = | |
42 | { | |
43 | {0, 0, 0} | |
44 | }; | |
45 | ||
46 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
47 | const char EXP_CHARS[] = "eE"; | |
48 | ||
49 | /* This function is called once, at assembler startup time. It sets | |
50 | up the hash table with all the opcodes in it, and also initializes | |
51 | some aliases for compatibility with other assemblers. */ | |
52 | ||
53 | void | |
54 | md_begin (void) | |
55 | { | |
56 | const ft32_opc_info_t *opcode; | |
57 | opcode_hash_control = hash_new (); | |
58 | ||
59 | /* Insert names into hash table. */ | |
60 | for (opcode = ft32_opc_info; opcode->name; opcode++) | |
61 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); | |
62 | ||
63 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, 0); | |
81b42bca JB |
64 | if (!norelax) |
65 | linkrelax = 1; | |
3f8107ab AM |
66 | } |
67 | ||
68 | /* Parse an expression and then restore the input line pointer. */ | |
69 | ||
70 | static char * | |
71 | parse_exp_save_ilp (char *s, expressionS *op) | |
72 | { | |
73 | char *save = input_line_pointer; | |
74 | ||
75 | input_line_pointer = s; | |
76 | expression (op); | |
77 | s = input_line_pointer; | |
78 | input_line_pointer = save; | |
79 | return s; | |
80 | } | |
81 | ||
82 | static int | |
83 | parse_condition (char **ptr) | |
84 | { | |
85 | char *s = *ptr; | |
81b42bca JB |
86 | static const struct |
87 | { | |
e0471c16 | 88 | const char *name; |
3f8107ab | 89 | int bits; |
81b42bca JB |
90 | } |
91 | ccs[] = | |
92 | { | |
3f8107ab AM |
93 | { "gt," , (2 << FT32_FLD_CR_BIT) | (5 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, |
94 | { "gte," , (2 << FT32_FLD_CR_BIT) | (4 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, | |
95 | { "lt," , (2 << FT32_FLD_CR_BIT) | (4 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, | |
96 | { "lte," , (2 << FT32_FLD_CR_BIT) | (5 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, | |
97 | { "a," , (2 << FT32_FLD_CR_BIT) | (6 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, | |
98 | { "ae," , (2 << FT32_FLD_CR_BIT) | (1 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, | |
99 | { "be," , (2 << FT32_FLD_CR_BIT) | (6 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, | |
100 | { "b," , (2 << FT32_FLD_CR_BIT) | (1 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, | |
101 | { "nz," , (2 << FT32_FLD_CR_BIT) | (0 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, | |
102 | { "z," , (2 << FT32_FLD_CR_BIT) | (0 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, | |
103 | { "nc," , (2 << FT32_FLD_CR_BIT) | (1 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, | |
104 | { "c," , (2 << FT32_FLD_CR_BIT) | (1 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, | |
105 | { "no," , (2 << FT32_FLD_CR_BIT) | (2 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, | |
106 | { "o," , (2 << FT32_FLD_CR_BIT) | (2 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, | |
107 | { "ns," , (2 << FT32_FLD_CR_BIT) | (3 << FT32_FLD_CB_BIT) | (0 << FT32_FLD_CV_BIT)}, | |
108 | { "s," , (2 << FT32_FLD_CR_BIT) | (3 << FT32_FLD_CB_BIT) | (1 << FT32_FLD_CV_BIT)}, | |
109 | { NULL, 0} | |
110 | }, *pc; | |
111 | ||
112 | for (pc = ccs; pc->name; pc++) | |
113 | { | |
114 | if (memcmp(pc->name, s, strlen(pc->name)) == 0) | |
115 | { | |
116 | *ptr += strlen(pc->name) - 1; | |
117 | return pc->bits; | |
118 | } | |
119 | } | |
120 | return -1; | |
121 | } | |
122 | ||
123 | static int | |
124 | parse_decimal (char **ptr) | |
125 | { | |
126 | int r = 0; | |
127 | char *s = *ptr; | |
128 | ||
129 | while (('0' <= *s) && (*s <= '9')) | |
130 | { | |
131 | r *= 10; | |
132 | r += (*s++ - '0'); | |
133 | } | |
134 | *ptr = s; | |
135 | return r; | |
136 | } | |
137 | ||
138 | static int | |
139 | parse_register_operand (char **ptr) | |
140 | { | |
141 | int reg; | |
142 | char *s = *ptr; | |
143 | ||
144 | if (*s != '$') | |
145 | { | |
146 | as_bad (_("expecting register")); | |
147 | ignore_rest_of_line (); | |
148 | return -1; | |
149 | } | |
150 | if ((s[1] == 's') && (s[2] == 'p')) | |
151 | { | |
152 | reg = 31; | |
153 | } | |
154 | else if ((s[1] == 'c') && (s[2] == 'c')) | |
155 | { | |
156 | reg = 30; | |
157 | } | |
158 | else if ((s[1] == 'f') && (s[2] == 'p')) | |
159 | { | |
160 | reg = 29; | |
161 | } | |
162 | else if (s[1] == 'r') | |
163 | { | |
164 | reg = s[2] - '0'; | |
165 | if ((reg < 0) || (reg > 9)) | |
166 | { | |
167 | as_bad (_("illegal register number")); | |
168 | ignore_rest_of_line (); | |
169 | return -1; | |
170 | } | |
171 | if ((reg == 1) || (reg == 2) || (reg == 3)) | |
172 | { | |
173 | int r2 = s[3] - '0'; | |
174 | if ((r2 >= 0) && (r2 <= 9)) | |
175 | { | |
176 | reg = (reg * 10) + r2; | |
177 | *ptr += 1; | |
178 | } | |
179 | } | |
180 | } | |
181 | else | |
182 | { | |
183 | as_bad (_("illegal register number")); | |
184 | ignore_rest_of_line (); | |
185 | return -1; | |
186 | } | |
187 | ||
188 | *ptr += 3; | |
189 | ||
190 | return reg; | |
191 | } | |
192 | ||
193 | /* This is the guts of the machine-dependent assembler. STR points to | |
194 | a machine dependent instruction. This function is supposed to emit | |
195 | the frags/bytes it assembles to. */ | |
196 | ||
197 | void | |
198 | md_assemble (char *str) | |
199 | { | |
200 | char *op_start; | |
201 | char *op_end; | |
3f8107ab AM |
202 | ft32_opc_info_t *opcode; |
203 | char *output; | |
204 | int idx = 0; | |
205 | char pend; | |
3f8107ab | 206 | int nlen = 0; |
3f8107ab AM |
207 | unsigned int b; |
208 | int f; | |
3f8107ab | 209 | expressionS arg; |
81b42bca JB |
210 | bfd_boolean fixed = FALSE; |
211 | unsigned int sc; | |
212 | bfd_boolean can_sc; | |
3f8107ab AM |
213 | |
214 | /* Drop leading whitespace. */ | |
215 | while (*str == ' ') | |
216 | str++; | |
217 | ||
218 | /* Find the op code end. */ | |
219 | op_start = str; | |
220 | for (op_end = str; | |
81b42bca JB |
221 | *op_end |
222 | && !is_end_of_line[*op_end & 0xff] | |
223 | && *op_end != ' ' | |
224 | && *op_end != '.'; | |
3f8107ab AM |
225 | op_end++) |
226 | nlen++; | |
227 | ||
228 | pend = *op_end; | |
229 | *op_end = 0; | |
230 | ||
231 | if (nlen == 0) | |
232 | as_bad (_("can't find opcode ")); | |
233 | ||
234 | opcode = (ft32_opc_info_t *) hash_find (opcode_hash_control, op_start); | |
235 | *op_end = pend; | |
236 | ||
237 | if (opcode == NULL) | |
238 | { | |
239 | as_bad (_("unknown opcode %s"), op_start); | |
240 | return; | |
241 | } | |
242 | ||
243 | b = opcode->bits; | |
244 | f = opcode->fields; | |
245 | ||
246 | if (opcode->dw) | |
247 | { | |
248 | int dw; | |
81b42bca | 249 | |
3f8107ab AM |
250 | if (*op_end == '.') |
251 | { | |
252 | switch (op_end[1]) | |
253 | { | |
254 | case 'b': | |
255 | dw = 0; | |
256 | break; | |
257 | case 's': | |
258 | dw = 1; | |
259 | break; | |
260 | case 'l': | |
261 | dw = 2; | |
262 | break; | |
263 | default: | |
264 | as_bad (_("unknown width specifier '.%c'"), op_end[1]); | |
265 | return; | |
266 | } | |
267 | op_end += 2; | |
268 | } | |
269 | else | |
270 | { | |
271 | dw = 2; /* default is ".l" */ | |
272 | } | |
273 | b |= dw << FT32_FLD_DW_BIT; | |
274 | } | |
275 | ||
276 | while (ISSPACE (*op_end)) | |
277 | op_end++; | |
278 | ||
279 | output = frag_more (4); | |
280 | ||
281 | while (f) | |
282 | { | |
283 | int lobit = f & -f; | |
81b42bca | 284 | |
3f8107ab AM |
285 | if (f & lobit) |
286 | { | |
287 | switch (lobit) | |
81b42bca JB |
288 | { |
289 | case FT32_FLD_CBCRCV: | |
290 | b |= parse_condition( &op_end); | |
291 | break; | |
292 | case FT32_FLD_CB: | |
293 | b |= parse_decimal (&op_end) << FT32_FLD_CB_BIT; | |
294 | break; | |
295 | case FT32_FLD_R_D: | |
296 | b |= parse_register_operand (&op_end) << FT32_FLD_R_D_BIT; | |
297 | break; | |
298 | case FT32_FLD_CR: | |
299 | b |= (parse_register_operand (&op_end) - 28) << FT32_FLD_CR_BIT; | |
300 | break; | |
301 | case FT32_FLD_CV: | |
302 | b |= parse_decimal (&op_end) << FT32_FLD_CV_BIT; | |
303 | break; | |
304 | case FT32_FLD_R_1: | |
305 | b |= parse_register_operand (&op_end) << FT32_FLD_R_1_BIT; | |
306 | break; | |
307 | case FT32_FLD_RIMM: | |
308 | if (*op_end == '$') | |
309 | { | |
310 | b |= parse_register_operand (&op_end) << FT32_FLD_RIMM_BIT; | |
311 | } | |
312 | else | |
313 | { | |
314 | b |= 0x400 << FT32_FLD_RIMM_BIT; | |
315 | op_end = parse_exp_save_ilp (op_end, &arg); | |
316 | fixed = TRUE; | |
317 | fix_new_exp (frag_now, | |
318 | (output - frag_now->fr_literal), | |
319 | 2, | |
320 | &arg, | |
321 | 0, | |
322 | BFD_RELOC_FT32_10); | |
323 | } | |
324 | break; | |
325 | case FT32_FLD_R_2: | |
326 | b |= parse_register_operand (&op_end) << FT32_FLD_R_2_BIT; | |
327 | break; | |
328 | case FT32_FLD_K20: | |
329 | op_end = parse_exp_save_ilp (op_end, &arg); | |
330 | fixed = TRUE; | |
331 | fix_new_exp (frag_now, | |
332 | (output - frag_now->fr_literal), | |
333 | 3, | |
334 | &arg, | |
335 | 0, | |
336 | BFD_RELOC_FT32_20); | |
337 | break; | |
338 | case FT32_FLD_PA: | |
339 | op_end = parse_exp_save_ilp (op_end, &arg); | |
340 | fixed = TRUE; | |
341 | fix_new_exp (frag_now, | |
342 | (output - frag_now->fr_literal), | |
343 | 3, | |
344 | &arg, | |
345 | 0, | |
346 | BFD_RELOC_FT32_18); | |
347 | break; | |
348 | case FT32_FLD_AA: | |
349 | op_end = parse_exp_save_ilp (op_end, &arg); | |
350 | fixed = TRUE; | |
351 | fix_new_exp (frag_now, | |
352 | (output - frag_now->fr_literal), | |
353 | 3, | |
354 | &arg, | |
355 | 0, | |
356 | BFD_RELOC_FT32_17); | |
357 | break; | |
358 | case FT32_FLD_K16: | |
359 | op_end = parse_exp_save_ilp (op_end, &arg); | |
360 | fixed = TRUE; | |
361 | fix_new_exp (frag_now, | |
362 | (output - frag_now->fr_literal), | |
363 | 2, | |
364 | &arg, | |
365 | 0, | |
366 | BFD_RELOC_16); | |
367 | break; | |
368 | case FT32_FLD_K15: | |
369 | op_end = parse_exp_save_ilp (op_end, &arg); | |
370 | if (arg.X_add_number & 0x80) | |
371 | arg.X_add_number ^= 0x7f00; | |
372 | fixed = TRUE; | |
373 | fix_new_exp (frag_now, | |
374 | (output - frag_now->fr_literal), | |
375 | 2, | |
376 | &arg, | |
377 | 0, | |
378 | BFD_RELOC_FT32_15); | |
379 | break; | |
380 | case FT32_FLD_R_D_POST: | |
381 | b |= parse_register_operand (&op_end) << FT32_FLD_R_D_BIT; | |
382 | break; | |
383 | case FT32_FLD_R_1_POST: | |
384 | b |= parse_register_operand (&op_end) << FT32_FLD_R_1_BIT; | |
385 | break; | |
386 | default: | |
387 | as_bad (_("internal error in argument parsing")); | |
388 | break; | |
389 | } | |
390 | ||
3f8107ab | 391 | f &= ~lobit; |
81b42bca | 392 | |
3f8107ab AM |
393 | if (f) |
394 | { | |
395 | while (ISSPACE (*op_end)) | |
396 | op_end++; | |
397 | ||
398 | if (*op_end != ',') | |
399 | { | |
400 | as_bad (_("expected comma separator")); | |
401 | ignore_rest_of_line (); | |
402 | } | |
403 | ||
404 | op_end++; | |
405 | while (ISSPACE (*op_end)) | |
406 | op_end++; | |
407 | } | |
408 | } | |
409 | } | |
81b42bca | 410 | |
3f8107ab AM |
411 | if (*op_end != 0) |
412 | as_warn (_("extra stuff on line ignored")); | |
413 | ||
81b42bca JB |
414 | can_sc = ft32_shortcode (b, &sc); |
415 | ||
416 | if (!fixed && can_sc) | |
417 | { | |
418 | arg.X_op = O_constant; | |
419 | arg.X_add_number = 0; | |
420 | arg.X_add_symbol = NULL; | |
421 | arg.X_op_symbol = NULL; | |
422 | fix_new_exp (frag_now, | |
423 | (output - frag_now->fr_literal), | |
424 | 2, | |
425 | &arg, | |
426 | 0, | |
427 | BFD_RELOC_FT32_RELAX); | |
428 | } | |
429 | ||
3f8107ab AM |
430 | output[idx++] = 0xff & (b >> 0); |
431 | output[idx++] = 0xff & (b >> 8); | |
432 | output[idx++] = 0xff & (b >> 16); | |
433 | output[idx++] = 0xff & (b >> 24); | |
434 | ||
3ee6e4fb NC |
435 | dwarf2_emit_insn (4); |
436 | ||
3f8107ab AM |
437 | while (ISSPACE (*op_end)) |
438 | op_end++; | |
439 | ||
440 | if (*op_end != 0) | |
441 | as_warn ("extra stuff on line ignored"); | |
442 | ||
443 | if (pending_reloc) | |
444 | as_bad ("Something forgot to clean up\n"); | |
445 | } | |
446 | ||
447 | /* Turn a string in input_line_pointer into a floating point constant | |
448 | of type type, and store the appropriate bytes in *LITP. The number | |
449 | of LITTLENUMS emitted is stored in *SIZEP . An error message is | |
450 | returned, or NULL on OK. */ | |
451 | ||
6d4af3c2 | 452 | const char * |
3f8107ab AM |
453 | md_atof (int type, char *litP, int *sizeP) |
454 | { | |
455 | int prec; | |
456 | LITTLENUM_TYPE words[4]; | |
457 | char *t; | |
458 | int i; | |
459 | ||
460 | switch (type) | |
461 | { | |
462 | case 'f': | |
463 | prec = 2; | |
464 | break; | |
465 | ||
466 | case 'd': | |
467 | prec = 4; | |
468 | break; | |
469 | ||
470 | default: | |
471 | *sizeP = 0; | |
472 | return _("bad call to md_atof"); | |
473 | } | |
474 | ||
475 | t = atof_ieee (input_line_pointer, type, words); | |
476 | if (t) | |
477 | input_line_pointer = t; | |
478 | ||
479 | *sizeP = prec * 2; | |
480 | ||
481 | for (i = prec - 1; i >= 0; i--) | |
482 | { | |
483 | md_number_to_chars (litP, (valueT) words[i], 2); | |
484 | litP += 2; | |
485 | } | |
486 | ||
487 | return NULL; | |
488 | } | |
489 | \f | |
490 | const char *md_shortopts = ""; | |
491 | ||
492 | struct option md_longopts[] = | |
493 | { | |
81b42bca JB |
494 | #define OPTION_NORELAX (OPTION_MD_BASE) |
495 | {"norelax", no_argument, NULL, OPTION_NORELAX}, | |
496 | {"no-relax", no_argument, NULL, OPTION_NORELAX}, | |
3f8107ab AM |
497 | {NULL, no_argument, NULL, 0} |
498 | }; | |
499 | size_t md_longopts_size = sizeof (md_longopts); | |
500 | ||
501 | /* We have no target specific options yet, so these next | |
502 | two functions are empty. */ | |
503 | int | |
17b9d67d | 504 | md_parse_option (int c ATTRIBUTE_UNUSED, const char *arg ATTRIBUTE_UNUSED) |
3f8107ab | 505 | { |
81b42bca JB |
506 | switch (c) |
507 | { | |
508 | case OPTION_NORELAX: | |
509 | norelax = 1; | |
510 | break; | |
511 | ||
512 | default: | |
513 | return 0; | |
514 | } | |
515 | ||
516 | return 1; | |
3f8107ab AM |
517 | } |
518 | ||
519 | void | |
520 | md_show_usage (FILE *stream ATTRIBUTE_UNUSED) | |
521 | { | |
81b42bca JB |
522 | fprintf (stream, _("FT32 options:\n")); |
523 | fprintf (stream, _("\n\ | |
524 | -no-relax don't relax relocations\n\ | |
525 | \n")); | |
3f8107ab AM |
526 | } |
527 | ||
528 | /* Convert from target byte order to host byte order. */ | |
529 | ||
530 | static valueT | |
531 | md_chars_to_number (char * buf, int n) | |
532 | { | |
533 | valueT result = 0; | |
534 | unsigned char * where = (unsigned char *) buf; | |
535 | ||
536 | while (n--) | |
537 | { | |
538 | result <<= 8; | |
539 | result |= (where[n] & 255); | |
540 | } | |
541 | ||
542 | return result; | |
543 | } | |
81b42bca | 544 | |
3f8107ab AM |
545 | /* Apply a fixup to the object file. */ |
546 | ||
547 | void | |
548 | md_apply_fix (fixS *fixP ATTRIBUTE_UNUSED, | |
549 | valueT * valP ATTRIBUTE_UNUSED, segT seg ATTRIBUTE_UNUSED) | |
550 | { | |
551 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
552 | long val = *valP; | |
553 | long newval; | |
554 | ||
81b42bca JB |
555 | if (linkrelax && fixP->fx_subsy) |
556 | { | |
557 | /* For a subtraction relocation expression, generate one | |
558 | of the DIFF relocs, with the value being the difference. | |
559 | Note that a sym1 - sym2 expression is adjusted into a | |
560 | section_start_sym + sym4_offset_from_section_start - sym1 | |
561 | expression. fixP->fx_addsy holds the section start symbol, | |
562 | fixP->fx_offset holds sym2's offset, and fixP->fx_subsy | |
563 | holds sym1. Calculate the current difference and write value, | |
564 | but leave fx_offset as is - during relaxation, | |
565 | fx_offset - value gives sym1's value. */ | |
566 | ||
567 | switch (fixP->fx_r_type) | |
568 | { | |
569 | case BFD_RELOC_32: | |
570 | fixP->fx_r_type = BFD_RELOC_FT32_DIFF32; | |
571 | break; | |
572 | default: | |
573 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
574 | _("expression too complex")); | |
575 | break; | |
576 | } | |
577 | ||
578 | val = S_GET_VALUE (fixP->fx_addsy) + | |
579 | fixP->fx_offset - S_GET_VALUE (fixP->fx_subsy); | |
580 | *valP = val; | |
581 | ||
582 | fixP->fx_subsy = NULL; | |
583 | } | |
584 | ||
585 | /* We don't actually support subtracting a symbol. */ | |
586 | if (fixP->fx_subsy != (symbolS *) NULL) | |
587 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
588 | ||
3f8107ab AM |
589 | switch (fixP->fx_r_type) |
590 | { | |
81b42bca | 591 | case BFD_RELOC_FT32_DIFF32: |
3f8107ab AM |
592 | case BFD_RELOC_32: |
593 | buf[3] = val >> 24; | |
594 | buf[2] = val >> 16; | |
595 | buf[1] = val >> 8; | |
596 | buf[0] = val >> 0; | |
597 | break; | |
598 | ||
599 | case BFD_RELOC_16: | |
600 | buf[1] = val >> 8; | |
601 | buf[0] = val >> 0; | |
602 | break; | |
603 | ||
604 | case BFD_RELOC_8: | |
605 | *buf = val; | |
606 | break; | |
607 | ||
608 | case BFD_RELOC_FT32_10: | |
609 | if (!val) | |
610 | break; | |
611 | newval = md_chars_to_number (buf, 2); | |
612 | newval |= (val & ((1 << 10) - 1)) << FT32_FLD_RIMM_BIT; | |
613 | md_number_to_chars (buf, newval, 2); | |
614 | break; | |
615 | ||
616 | case BFD_RELOC_FT32_20: | |
617 | if (!val) | |
618 | break; | |
619 | newval = md_chars_to_number (buf, 3); | |
620 | newval |= val & ((1 << 20) - 1); | |
621 | md_number_to_chars (buf, newval, 3); | |
622 | break; | |
623 | ||
3b4b0a62 JB |
624 | case BFD_RELOC_FT32_15: |
625 | if (!val) | |
626 | break; | |
627 | newval = md_chars_to_number (buf, 2); | |
628 | newval |= val & ((1 << 15) - 1); | |
629 | md_number_to_chars (buf, newval, 2); | |
630 | break; | |
631 | ||
3f8107ab AM |
632 | case BFD_RELOC_FT32_17: |
633 | if (!val) | |
634 | break; | |
635 | newval = md_chars_to_number (buf, 3); | |
636 | newval |= val & ((1 << 17) - 1); | |
637 | md_number_to_chars (buf, newval, 3); | |
638 | break; | |
639 | ||
640 | case BFD_RELOC_FT32_18: | |
641 | if (!val) | |
642 | break; | |
643 | newval = md_chars_to_number (buf, 4); | |
644 | newval |= (val >> 2) & ((1 << 18) - 1); | |
645 | md_number_to_chars (buf, newval, 4); | |
646 | break; | |
647 | ||
81b42bca JB |
648 | case BFD_RELOC_FT32_RELAX: |
649 | break; | |
650 | ||
3f8107ab AM |
651 | default: |
652 | abort (); | |
653 | } | |
654 | ||
655 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) | |
656 | fixP->fx_done = 1; | |
3f8107ab AM |
657 | } |
658 | ||
659 | void | |
660 | md_number_to_chars (char *ptr, valueT use, int nbytes) | |
661 | { | |
662 | number_to_chars_littleendian (ptr, use, nbytes); | |
663 | } | |
664 | ||
665 | /* Generate a machine-dependent relocation. */ | |
81b42bca | 666 | |
3f8107ab AM |
667 | arelent * |
668 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixP) | |
669 | { | |
670 | arelent *relP; | |
671 | bfd_reloc_code_real_type code; | |
672 | ||
673 | switch (fixP->fx_r_type) | |
674 | { | |
675 | case BFD_RELOC_32: | |
676 | case BFD_RELOC_16: | |
677 | case BFD_RELOC_8: | |
678 | case BFD_RELOC_FT32_10: | |
679 | case BFD_RELOC_FT32_20: | |
3b4b0a62 | 680 | case BFD_RELOC_FT32_15: |
3f8107ab AM |
681 | case BFD_RELOC_FT32_17: |
682 | case BFD_RELOC_FT32_18: | |
81b42bca JB |
683 | case BFD_RELOC_FT32_RELAX: |
684 | case BFD_RELOC_FT32_DIFF32: | |
3f8107ab AM |
685 | code = fixP->fx_r_type; |
686 | break; | |
687 | default: | |
688 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
81b42bca JB |
689 | _("Semantics error. This type of operand can not be " |
690 | "relocated, it must be an assembly-time constant")); | |
691 | return NULL; | |
3f8107ab AM |
692 | } |
693 | ||
325801bd | 694 | relP = XNEW (arelent); |
3f8107ab | 695 | gas_assert (relP != 0); |
325801bd | 696 | relP->sym_ptr_ptr = XNEW (asymbol *); |
3f8107ab AM |
697 | *relP->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); |
698 | relP->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
699 | ||
700 | relP->addend = fixP->fx_offset; | |
701 | ||
702 | relP->howto = bfd_reloc_type_lookup (stdoutput, code); | |
703 | if (! relP->howto) | |
704 | { | |
705 | const char *name; | |
706 | ||
707 | name = S_GET_NAME (fixP->fx_addsy); | |
708 | if (name == NULL) | |
709 | name = _("<unknown>"); | |
710 | as_fatal (_("Cannot generate relocation type for symbol %s, code %s"), | |
711 | name, bfd_get_reloc_code_name (code)); | |
712 | } | |
713 | ||
714 | return relP; | |
715 | } | |
81b42bca JB |
716 | |
717 | /* TC_FORCE_RELOCATION hook */ | |
718 | ||
719 | static bfd_boolean | |
720 | relaxable_section (asection *sec) | |
721 | { | |
722 | return ((sec->flags & SEC_DEBUGGING) == 0 | |
723 | && (sec->flags & SEC_CODE) != 0 | |
724 | && (sec->flags & SEC_ALLOC) != 0); | |
725 | } | |
726 | ||
727 | /* Does whatever the xtensa port does. */ | |
728 | ||
729 | int | |
730 | ft32_validate_fix_sub (fixS *fix) | |
731 | { | |
732 | segT add_symbol_segment, sub_symbol_segment; | |
733 | ||
734 | /* The difference of two symbols should be resolved by the assembler when | |
735 | linkrelax is not set. If the linker may relax the section containing | |
736 | the symbols, then an Xtensa DIFF relocation must be generated so that | |
737 | the linker knows to adjust the difference value. */ | |
738 | if (!linkrelax || fix->fx_addsy == NULL) | |
739 | return 0; | |
740 | ||
741 | /* Make sure both symbols are in the same segment, and that segment is | |
742 | "normal" and relaxable. If the segment is not "normal", then the | |
743 | fix is not valid. If the segment is not "relaxable", then the fix | |
744 | should have been handled earlier. */ | |
745 | add_symbol_segment = S_GET_SEGMENT (fix->fx_addsy); | |
746 | if (! SEG_NORMAL (add_symbol_segment) || | |
747 | ! relaxable_section (add_symbol_segment)) | |
748 | return 0; | |
749 | ||
750 | sub_symbol_segment = S_GET_SEGMENT (fix->fx_subsy); | |
751 | return (sub_symbol_segment == add_symbol_segment); | |
752 | } | |
753 | ||
754 | /* TC_FORCE_RELOCATION hook */ | |
755 | ||
756 | /* If linkrelax is turned on, and the symbol to relocate | |
757 | against is in a relaxable segment, don't compute the value - | |
758 | generate a relocation instead. */ | |
759 | ||
760 | int | |
761 | ft32_force_relocation (fixS *fix) | |
762 | { | |
763 | if (linkrelax && fix->fx_addsy | |
764 | && relaxable_section (S_GET_SEGMENT (fix->fx_addsy))) | |
765 | { | |
766 | return 1; | |
767 | } | |
768 | ||
769 | return generic_force_reloc (fix); | |
770 | } | |
771 | ||
772 | bfd_boolean | |
773 | ft32_allow_local_subtract (expressionS * left, | |
774 | expressionS * right, | |
775 | segT section) | |
776 | { | |
777 | /* If we are not in relaxation mode, subtraction is OK. */ | |
778 | if (!linkrelax) | |
779 | return TRUE; | |
780 | ||
781 | /* If the symbols are not in a code section then they are OK. */ | |
782 | if ((section->flags & SEC_CODE) == 0) | |
783 | return TRUE; | |
784 | ||
785 | if (left->X_add_symbol == right->X_add_symbol) | |
786 | return TRUE; | |
787 | ||
788 | /* We have to assume that there may be instructions between the | |
789 | two symbols and that relaxation may increase the distance between | |
790 | them. */ | |
791 | return FALSE; | |
792 | } |