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252b5132 | 1 | /* GAS interface for targets using CGEN: Cpu tools GENerator. |
28e7409f | 2 | Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to the Free Software | |
18 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include <setjmp.h> | |
21 | #include "ansidecl.h" | |
22 | #include "libiberty.h" | |
23 | #include "bfd.h" | |
24 | #include "symcat.h" | |
25 | #include "cgen-desc.h" | |
26 | #include "as.h" | |
27 | #include "subsegs.h" | |
28 | #include "cgen.h" | |
29 | ||
30 | /* Opcode table descriptor, must be set by md_begin. */ | |
31 | ||
32 | CGEN_CPU_DESC gas_cgen_cpu_desc; | |
33 | ||
34 | /* Callback to insert a register into the symbol table. | |
35 | A target may choose to let GAS parse the registers. | |
36 | ??? Not currently used. */ | |
37 | ||
38 | void | |
39 | cgen_asm_record_register (name, number) | |
40 | char * name; | |
41 | int number; | |
42 | { | |
43 | /* Use symbol_create here instead of symbol_new so we don't try to | |
44 | output registers into the object file's symbol table. */ | |
45 | symbol_table_insert (symbol_create (name, reg_section, | |
46 | number, & zero_address_frag)); | |
47 | } | |
48 | ||
49 | /* We need to keep a list of fixups. We can't simply generate them as | |
50 | we go, because that would require us to first create the frag, and | |
51 | that would screw up references to ``.''. | |
52 | ||
53 | This is used by cpu's with simple operands. It keeps knowledge of what | |
54 | an `expressionS' is and what a `fixup' is out of CGEN which for the time | |
55 | being is preferable. | |
56 | ||
57 | OPINDEX is the index in the operand table. | |
58 | OPINFO is something the caller chooses to help in reloc determination. */ | |
59 | ||
60 | struct fixup | |
61 | { | |
62 | int opindex; | |
63 | int opinfo; | |
64 | expressionS exp; | |
65 | }; | |
66 | ||
67 | static struct fixup fixups [GAS_CGEN_MAX_FIXUPS]; | |
68 | static int num_fixups; | |
69 | ||
70 | /* Prepare to parse an instruction. | |
71 | ??? May wish to make this static and delete calls in md_assemble. */ | |
72 | ||
73 | void | |
74 | gas_cgen_init_parse () | |
75 | { | |
76 | num_fixups = 0; | |
77 | } | |
78 | ||
79 | /* Queue a fixup. */ | |
80 | ||
81 | static void | |
82 | queue_fixup (opindex, opinfo, expP) | |
83 | int opindex; | |
eabed1c0 | 84 | int opinfo; |
252b5132 RH |
85 | expressionS * expP; |
86 | { | |
87 | /* We need to generate a fixup for this expression. */ | |
88 | if (num_fixups >= GAS_CGEN_MAX_FIXUPS) | |
89 | as_fatal (_("too many fixups")); | |
90 | fixups[num_fixups].exp = * expP; | |
91 | fixups[num_fixups].opindex = opindex; | |
92 | fixups[num_fixups].opinfo = opinfo; | |
93 | ++ num_fixups; | |
94 | } | |
95 | ||
96 | /* The following three functions allow a backup of the fixup chain to be made, | |
97 | and to have this backup be swapped with the current chain. This allows | |
98 | certain ports, eg the m32r, to swap two instructions and swap their fixups | |
99 | at the same time. */ | |
100 | /* ??? I think with cgen_asm_finish_insn (or something else) there is no | |
101 | more need for this. */ | |
102 | ||
103 | static struct fixup saved_fixups [GAS_CGEN_MAX_FIXUPS]; | |
104 | static int saved_num_fixups; | |
105 | ||
106 | void | |
107 | gas_cgen_save_fixups () | |
108 | { | |
109 | saved_num_fixups = num_fixups; | |
110 | ||
111 | memcpy (saved_fixups, fixups, sizeof (fixups[0]) * num_fixups); | |
112 | ||
113 | num_fixups = 0; | |
114 | } | |
115 | ||
116 | void | |
117 | gas_cgen_restore_fixups () | |
118 | { | |
119 | num_fixups = saved_num_fixups; | |
120 | ||
121 | memcpy (fixups, saved_fixups, sizeof (fixups[0]) * num_fixups); | |
122 | ||
123 | saved_num_fixups = 0; | |
124 | } | |
125 | ||
126 | void | |
127 | gas_cgen_swap_fixups () | |
128 | { | |
129 | int tmp; | |
130 | struct fixup tmp_fixup; | |
131 | ||
132 | if (num_fixups == 0) | |
133 | { | |
134 | gas_cgen_restore_fixups (); | |
135 | } | |
136 | else if (saved_num_fixups == 0) | |
137 | { | |
138 | gas_cgen_save_fixups (); | |
139 | } | |
140 | else | |
141 | { | |
142 | tmp = saved_num_fixups; | |
143 | saved_num_fixups = num_fixups; | |
144 | num_fixups = tmp; | |
145 | ||
146 | for (tmp = GAS_CGEN_MAX_FIXUPS; tmp--;) | |
147 | { | |
148 | tmp_fixup = saved_fixups [tmp]; | |
149 | saved_fixups [tmp] = fixups [tmp]; | |
150 | fixups [tmp] = tmp_fixup; | |
151 | } | |
152 | } | |
153 | } | |
154 | ||
155 | /* Default routine to record a fixup. | |
156 | This is a cover function to fix_new. | |
157 | It exists because we record INSN with the fixup. | |
158 | ||
159 | FRAG and WHERE are their respective arguments to fix_new_exp. | |
160 | LENGTH is in bits. | |
161 | OPINFO is something the caller chooses to help in reloc determination. | |
162 | ||
163 | At this point we do not use a bfd_reloc_code_real_type for | |
164 | operands residing in the insn, but instead just use the | |
165 | operand index. This lets us easily handle fixups for any | |
166 | operand type. We pick a BFD reloc type in md_apply_fix. */ | |
167 | ||
168 | fixS * | |
169 | gas_cgen_record_fixup (frag, where, insn, length, operand, opinfo, symbol, offset) | |
170 | fragS * frag; | |
171 | int where; | |
172 | const CGEN_INSN * insn; | |
173 | int length; | |
174 | const CGEN_OPERAND * operand; | |
175 | int opinfo; | |
176 | symbolS * symbol; | |
177 | offsetT offset; | |
178 | { | |
179 | fixS * fixP; | |
180 | ||
181 | /* It may seem strange to use operand->attrs and not insn->attrs here, | |
182 | but it is the operand that has a pc relative relocation. */ | |
183 | ||
184 | fixP = fix_new (frag, where, length / 8, symbol, offset, | |
185 | CGEN_OPERAND_ATTR_VALUE (operand, CGEN_OPERAND_PCREL_ADDR), | |
186 | (bfd_reloc_code_real_type) | |
187 | ((int) BFD_RELOC_UNUSED | |
188 | + (int) operand->type)); | |
189 | fixP->fx_cgen.insn = insn; | |
190 | fixP->fx_cgen.opinfo = opinfo; | |
191 | ||
192 | return fixP; | |
193 | } | |
194 | ||
195 | /* Default routine to record a fixup given an expression. | |
196 | This is a cover function to fix_new_exp. | |
197 | It exists because we record INSN with the fixup. | |
198 | ||
199 | FRAG and WHERE are their respective arguments to fix_new_exp. | |
200 | LENGTH is in bits. | |
201 | OPINFO is something the caller chooses to help in reloc determination. | |
202 | ||
203 | At this point we do not use a bfd_reloc_code_real_type for | |
204 | operands residing in the insn, but instead just use the | |
205 | operand index. This lets us easily handle fixups for any | |
206 | operand type. We pick a BFD reloc type in md_apply_fix. */ | |
207 | ||
208 | fixS * | |
209 | gas_cgen_record_fixup_exp (frag, where, insn, length, operand, opinfo, exp) | |
210 | fragS * frag; | |
211 | int where; | |
212 | const CGEN_INSN * insn; | |
213 | int length; | |
214 | const CGEN_OPERAND * operand; | |
215 | int opinfo; | |
216 | expressionS * exp; | |
217 | { | |
218 | fixS * fixP; | |
219 | ||
220 | /* It may seem strange to use operand->attrs and not insn->attrs here, | |
221 | but it is the operand that has a pc relative relocation. */ | |
222 | ||
223 | fixP = fix_new_exp (frag, where, length / 8, exp, | |
224 | CGEN_OPERAND_ATTR_VALUE (operand, CGEN_OPERAND_PCREL_ADDR), | |
225 | (bfd_reloc_code_real_type) | |
226 | ((int) BFD_RELOC_UNUSED | |
227 | + (int) operand->type)); | |
228 | fixP->fx_cgen.insn = insn; | |
229 | fixP->fx_cgen.opinfo = opinfo; | |
230 | ||
231 | return fixP; | |
232 | } | |
233 | ||
234 | /* Used for communication between the next two procedures. */ | |
235 | static jmp_buf expr_jmp_buf; | |
680d2857 | 236 | static int expr_jmp_buf_p; |
252b5132 RH |
237 | |
238 | /* Callback for cgen interface. Parse the expression at *STRP. | |
239 | The result is an error message or NULL for success (in which case | |
240 | *STRP is advanced past the parsed text). | |
241 | WANT is an indication of what the caller is looking for. | |
242 | If WANT == CGEN_ASM_PARSE_INIT the caller is beginning to try to match | |
243 | a table entry with the insn, reset the queued fixups counter. | |
244 | An enum cgen_parse_operand_result is stored in RESULTP. | |
245 | OPINDEX is the operand's table entry index. | |
246 | OPINFO is something the caller chooses to help in reloc determination. | |
247 | The resulting value is stored in VALUEP. */ | |
248 | ||
249 | const char * | |
250 | gas_cgen_parse_operand (cd, want, strP, opindex, opinfo, resultP, valueP) | |
eabed1c0 | 251 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
252b5132 RH |
252 | enum cgen_parse_operand_type want; |
253 | const char ** strP; | |
254 | int opindex; | |
255 | int opinfo; | |
256 | enum cgen_parse_operand_result * resultP; | |
257 | bfd_vma * valueP; | |
258 | { | |
259 | #ifdef __STDC__ | |
260 | /* These are volatile to survive the setjmp. */ | |
261 | char * volatile hold; | |
262 | enum cgen_parse_operand_result * volatile resultP_1; | |
263 | #else | |
264 | static char * hold; | |
265 | static enum cgen_parse_operand_result * resultP_1; | |
266 | #endif | |
267 | const char * errmsg = NULL; | |
268 | expressionS exp; | |
269 | ||
270 | if (want == CGEN_PARSE_OPERAND_INIT) | |
271 | { | |
272 | gas_cgen_init_parse (); | |
273 | return NULL; | |
274 | } | |
275 | ||
276 | resultP_1 = resultP; | |
277 | hold = input_line_pointer; | |
278 | input_line_pointer = (char *) * strP; | |
279 | ||
280 | /* We rely on md_operand to longjmp back to us. | |
281 | This is done via gas_cgen_md_operand. */ | |
282 | if (setjmp (expr_jmp_buf) != 0) | |
283 | { | |
680d2857 | 284 | expr_jmp_buf_p = 0; |
252b5132 RH |
285 | input_line_pointer = (char *) hold; |
286 | * resultP_1 = CGEN_PARSE_OPERAND_RESULT_ERROR; | |
287 | return "illegal operand"; | |
288 | } | |
289 | ||
680d2857 | 290 | expr_jmp_buf_p = 1; |
252b5132 | 291 | expression (& exp); |
680d2857 | 292 | expr_jmp_buf_p = 0; |
252b5132 RH |
293 | |
294 | * strP = input_line_pointer; | |
295 | input_line_pointer = hold; | |
296 | ||
297 | /* FIXME: Need to check `want'. */ | |
298 | ||
299 | switch (exp.X_op) | |
300 | { | |
301 | case O_illegal : | |
302 | errmsg = _("illegal operand"); | |
303 | * resultP = CGEN_PARSE_OPERAND_RESULT_ERROR; | |
304 | break; | |
305 | case O_absent : | |
306 | errmsg = _("missing operand"); | |
307 | * resultP = CGEN_PARSE_OPERAND_RESULT_ERROR; | |
308 | break; | |
309 | case O_constant : | |
310 | * valueP = exp.X_add_number; | |
311 | * resultP = CGEN_PARSE_OPERAND_RESULT_NUMBER; | |
312 | break; | |
313 | case O_register : | |
314 | * valueP = exp.X_add_number; | |
315 | * resultP = CGEN_PARSE_OPERAND_RESULT_REGISTER; | |
316 | break; | |
317 | default : | |
318 | queue_fixup (opindex, opinfo, & exp); | |
319 | * valueP = 0; | |
320 | * resultP = CGEN_PARSE_OPERAND_RESULT_QUEUED; | |
321 | break; | |
322 | } | |
323 | ||
324 | return errmsg; | |
325 | } | |
326 | ||
327 | /* md_operand handler to catch unrecognized expressions and halt the | |
328 | parsing process so the next entry can be tried. | |
329 | ||
330 | ??? This could be done differently by adding code to `expression'. */ | |
331 | ||
332 | void | |
333 | gas_cgen_md_operand (expressionP) | |
eabed1c0 | 334 | expressionS * expressionP ATTRIBUTE_UNUSED; |
252b5132 | 335 | { |
680d2857 FCE |
336 | /* Don't longjmp if we're not called from within cgen_parse_operand(). */ |
337 | if (expr_jmp_buf_p) | |
338 | longjmp (expr_jmp_buf, 1); | |
252b5132 RH |
339 | } |
340 | ||
341 | /* Finish assembling instruction INSN. | |
342 | BUF contains what we've built up so far. | |
343 | LENGTH is the size of the insn in bits. | |
344 | RELAX_P is non-zero if relaxable insns should be emitted as such. | |
345 | Otherwise they're emitted in non-relaxable forms. | |
346 | The "result" is stored in RESULT if non-NULL. */ | |
347 | ||
348 | void | |
349 | gas_cgen_finish_insn (insn, buf, length, relax_p, result) | |
350 | const CGEN_INSN * insn; | |
351 | CGEN_INSN_BYTES_PTR buf; | |
352 | unsigned int length; | |
353 | int relax_p; | |
354 | finished_insnS * result; | |
355 | { | |
356 | int i; | |
357 | int relax_operand; | |
358 | char * f; | |
359 | unsigned int byte_len = length / 8; | |
360 | ||
361 | /* ??? Target foo issues various warnings here, so one might want to provide | |
362 | a hook here. However, our caller is defined in tc-foo.c so there | |
363 | shouldn't be a need for a hook. */ | |
364 | ||
365 | /* Write out the instruction. | |
366 | It is important to fetch enough space in one call to `frag_more'. | |
367 | We use (f - frag_now->fr_literal) to compute where we are and we | |
368 | don't want frag_now to change between calls. | |
369 | ||
370 | Relaxable instructions: We need to ensure we allocate enough | |
371 | space for the largest insn. */ | |
372 | ||
373 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX)) | |
374 | abort (); /* These currently shouldn't get here. */ | |
375 | ||
376 | /* Is there a relaxable insn with the relaxable operand needing a fixup? */ | |
377 | ||
378 | relax_operand = -1; | |
379 | if (relax_p && CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXABLE)) | |
380 | { | |
381 | /* Scan the fixups for the operand affected by relaxing | |
382 | (i.e. the branch address). */ | |
383 | ||
384 | for (i = 0; i < num_fixups; ++ i) | |
385 | { | |
386 | if (CGEN_OPERAND_ATTR_VALUE (cgen_operand_lookup_by_num (gas_cgen_cpu_desc, fixups[i].opindex), | |
387 | CGEN_OPERAND_RELAX)) | |
388 | { | |
389 | relax_operand = i; | |
390 | break; | |
391 | } | |
392 | } | |
393 | } | |
394 | ||
395 | if (relax_operand != -1) | |
396 | { | |
397 | int max_len; | |
398 | fragS * old_frag; | |
399 | ||
400 | #ifdef TC_CGEN_MAX_RELAX | |
401 | max_len = TC_CGEN_MAX_RELAX (insn, byte_len); | |
402 | #else | |
403 | max_len = CGEN_MAX_INSN_SIZE; | |
404 | #endif | |
405 | /* Ensure variable part and fixed part are in same fragment. */ | |
406 | /* FIXME: Having to do this seems like a hack. */ | |
407 | frag_grow (max_len); | |
408 | ||
409 | /* Allocate space for the fixed part. */ | |
410 | f = frag_more (byte_len); | |
411 | ||
412 | /* Create a relaxable fragment for this instruction. */ | |
413 | old_frag = frag_now; | |
414 | ||
415 | frag_var (rs_machine_dependent, | |
416 | max_len - byte_len /* max chars */, | |
417 | 0 /* variable part already allocated */, | |
418 | /* FIXME: When we machine generate the relax table, | |
419 | machine generate a macro to compute subtype. */ | |
420 | 1 /* subtype */, | |
421 | fixups[relax_operand].exp.X_add_symbol, | |
422 | fixups[relax_operand].exp.X_add_number, | |
423 | f); | |
424 | ||
425 | /* Record the operand number with the fragment so md_convert_frag | |
426 | can use gas_cgen_md_record_fixup to record the appropriate reloc. */ | |
427 | old_frag->fr_cgen.insn = insn; | |
428 | old_frag->fr_cgen.opindex = fixups[relax_operand].opindex; | |
429 | old_frag->fr_cgen.opinfo = fixups[relax_operand].opinfo; | |
430 | if (result) | |
431 | result->frag = old_frag; | |
432 | } | |
433 | else | |
434 | { | |
435 | f = frag_more (byte_len); | |
436 | if (result) | |
437 | result->frag = frag_now; | |
438 | } | |
439 | ||
440 | /* If we're recording insns as numbers (rather than a string of bytes), | |
441 | target byte order handling is deferred until now. */ | |
442 | #if CGEN_INT_INSN_P | |
443 | cgen_put_insn_value (gas_cgen_cpu_desc, f, length, *buf); | |
444 | #else | |
445 | memcpy (f, buf, byte_len); | |
446 | #endif | |
447 | ||
448 | /* Create any fixups. */ | |
449 | for (i = 0; i < num_fixups; ++i) | |
450 | { | |
451 | fixS *fixP; | |
452 | const CGEN_OPERAND *operand = | |
453 | cgen_operand_lookup_by_num (gas_cgen_cpu_desc, fixups[i].opindex); | |
454 | ||
455 | /* Don't create fixups for these. That's done during relaxation. | |
456 | We don't need to test for CGEN_INSN_RELAX as they can't get here | |
457 | (see above). */ | |
458 | if (relax_p | |
459 | && CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXABLE) | |
460 | && CGEN_OPERAND_ATTR_VALUE (operand, CGEN_OPERAND_RELAX)) | |
461 | continue; | |
462 | ||
463 | #ifndef md_cgen_record_fixup_exp | |
464 | #define md_cgen_record_fixup_exp gas_cgen_record_fixup_exp | |
465 | #endif | |
466 | ||
467 | fixP = md_cgen_record_fixup_exp (frag_now, f - frag_now->fr_literal, | |
468 | insn, length, operand, | |
469 | fixups[i].opinfo, | |
470 | & fixups[i].exp); | |
471 | if (result) | |
472 | result->fixups[i] = fixP; | |
473 | } | |
474 | ||
475 | if (result) | |
476 | { | |
477 | result->num_fixups = num_fixups; | |
478 | result->addr = f; | |
479 | } | |
480 | } | |
481 | ||
482 | /* Apply a fixup to the object code. This is called for all the | |
483 | fixups we generated by the call to fix_new_exp, above. In the call | |
484 | above we used a reloc code which was the largest legal reloc code | |
485 | plus the operand index. Here we undo that to recover the operand | |
486 | index. At this point all symbol values should be fully resolved, | |
487 | and we attempt to completely resolve the reloc. If we can not do | |
488 | that, we determine the correct reloc code and put it back in the fixup. */ | |
489 | ||
490 | /* FIXME: This function handles some of the fixups and bfd_install_relocation | |
491 | handles the rest. bfd_install_relocation (or some other bfd function) | |
492 | should handle them all. */ | |
493 | ||
494 | int | |
495 | gas_cgen_md_apply_fix3 (fixP, valueP, seg) | |
496 | fixS * fixP; | |
497 | valueT * valueP; | |
eabed1c0 | 498 | segT seg ATTRIBUTE_UNUSED; |
252b5132 RH |
499 | { |
500 | char * where = fixP->fx_frag->fr_literal + fixP->fx_where; | |
501 | valueT value; | |
502 | /* canonical name, since used a lot */ | |
503 | CGEN_CPU_DESC cd = gas_cgen_cpu_desc; | |
504 | ||
505 | /* FIXME FIXME FIXME: The value we are passed in *valuep includes | |
506 | the symbol values. Since we are using BFD_ASSEMBLER, if we are | |
507 | doing this relocation the code in write.c is going to call | |
508 | bfd_install_relocation, which is also going to use the symbol | |
509 | value. That means that if the reloc is fully resolved we want to | |
510 | use *valuep since bfd_install_relocation is not being used. | |
511 | However, if the reloc is not fully resolved we do not want to use | |
512 | *valuep, and must use fx_offset instead. However, if the reloc | |
513 | is PC relative, we do want to use *valuep since it includes the | |
514 | result of md_pcrel_from. This is confusing. */ | |
515 | ||
516 | if (fixP->fx_addsy == (symbolS *) NULL) | |
517 | { | |
518 | value = * valueP; | |
519 | fixP->fx_done = 1; | |
520 | } | |
521 | else if (fixP->fx_pcrel) | |
522 | value = * valueP; | |
523 | else | |
524 | { | |
525 | value = fixP->fx_offset; | |
526 | if (fixP->fx_subsy != (symbolS *) NULL) | |
527 | { | |
528 | if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section) | |
529 | value -= S_GET_VALUE (fixP->fx_subsy); | |
530 | else | |
531 | { | |
532 | /* We don't actually support subtracting a symbol. */ | |
533 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
534 | _("expression too complex")); | |
535 | } | |
536 | } | |
537 | } | |
538 | ||
539 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) | |
540 | { | |
541 | int opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; | |
542 | const CGEN_OPERAND *operand = cgen_operand_lookup_by_num (cd, opindex); | |
543 | const char *errmsg; | |
544 | bfd_reloc_code_real_type reloc_type; | |
545 | CGEN_FIELDS *fields = alloca (CGEN_CPU_SIZEOF_FIELDS (cd)); | |
546 | const CGEN_INSN *insn = fixP->fx_cgen.insn; | |
547 | ||
548 | /* If the reloc has been fully resolved finish the operand here. */ | |
549 | /* FIXME: This duplicates the capabilities of code in BFD. */ | |
550 | if (fixP->fx_done | |
551 | /* FIXME: If partial_inplace isn't set bfd_install_relocation won't | |
552 | finish the job. Testing for pcrel is a temporary hack. */ | |
553 | || fixP->fx_pcrel) | |
554 | { | |
555 | CGEN_CPU_SET_FIELDS_BITSIZE (cd) (fields, CGEN_INSN_BITSIZE (insn)); | |
556 | CGEN_CPU_SET_VMA_OPERAND (cd) (cd, opindex, fields, (bfd_vma) value); | |
557 | ||
558 | #if CGEN_INT_INSN_P | |
559 | { | |
560 | CGEN_INSN_INT insn_value = | |
561 | cgen_get_insn_value (cd, where, CGEN_INSN_BITSIZE (insn)); | |
562 | ||
563 | /* ??? 0 is passed for `pc' */ | |
564 | errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields, | |
565 | &insn_value, (bfd_vma) 0); | |
566 | cgen_put_insn_value (cd, where, CGEN_INSN_BITSIZE (insn), | |
567 | insn_value); | |
568 | } | |
569 | #else | |
570 | /* ??? 0 is passed for `pc' */ | |
571 | errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields, where, | |
572 | (bfd_vma) 0); | |
573 | #endif | |
574 | if (errmsg) | |
575 | as_bad_where (fixP->fx_file, fixP->fx_line, "%s", errmsg); | |
576 | } | |
577 | ||
578 | if (fixP->fx_done) | |
579 | return 1; | |
580 | ||
581 | /* The operand isn't fully resolved. Determine a BFD reloc value | |
582 | based on the operand information and leave it to | |
583 | bfd_install_relocation. Note that this doesn't work when | |
584 | partial_inplace == false. */ | |
585 | ||
586 | reloc_type = md_cgen_lookup_reloc (insn, operand, fixP); | |
587 | if (reloc_type != BFD_RELOC_NONE) | |
588 | { | |
589 | fixP->fx_r_type = reloc_type; | |
590 | } | |
591 | else | |
592 | { | |
593 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
594 | _("unresolved expression that must be resolved")); | |
595 | fixP->fx_done = 1; | |
596 | return 1; | |
597 | } | |
598 | } | |
599 | else if (fixP->fx_done) | |
600 | { | |
601 | /* We're finished with this fixup. Install it because | |
602 | bfd_install_relocation won't be called to do it. */ | |
603 | switch (fixP->fx_r_type) | |
604 | { | |
605 | case BFD_RELOC_8: | |
606 | md_number_to_chars (where, value, 1); | |
607 | break; | |
608 | case BFD_RELOC_16: | |
609 | md_number_to_chars (where, value, 2); | |
610 | break; | |
611 | case BFD_RELOC_32: | |
612 | md_number_to_chars (where, value, 4); | |
613 | break; | |
614 | /* FIXME: later add support for 64 bits. */ | |
615 | default: | |
616 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
617 | _("internal error: can't install fix for reloc type %d (`%s')"), | |
618 | fixP->fx_r_type, bfd_get_reloc_code_name (fixP->fx_r_type)); | |
619 | break; | |
620 | } | |
621 | } | |
622 | else | |
623 | { | |
624 | /* bfd_install_relocation will be called to finish things up. */ | |
625 | } | |
626 | ||
627 | /* Tuck `value' away for use by tc_gen_reloc. | |
628 | See the comment describing fx_addnumber in write.h. | |
629 | This field is misnamed (or misused :-). */ | |
630 | fixP->fx_addnumber = value; | |
631 | ||
632 | return 1; | |
633 | } | |
634 | ||
635 | /* Translate internal representation of relocation info to BFD target format. | |
636 | ||
637 | FIXME: To what extent can we get all relevant targets to use this? */ | |
638 | ||
639 | arelent * | |
640 | gas_cgen_tc_gen_reloc (section, fixP) | |
eabed1c0 | 641 | asection * section ATTRIBUTE_UNUSED; |
252b5132 RH |
642 | fixS * fixP; |
643 | { | |
644 | arelent * reloc; | |
645 | ||
646 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
647 | ||
648 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); | |
649 | if (reloc->howto == (reloc_howto_type *) NULL) | |
650 | { | |
651 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
652 | _("internal error: can't export reloc type %d (`%s')"), | |
653 | fixP->fx_r_type, bfd_get_reloc_code_name (fixP->fx_r_type)); | |
654 | return NULL; | |
655 | } | |
656 | ||
657 | assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); | |
658 | ||
080e41e6 ILT |
659 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
660 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); | |
252b5132 RH |
661 | |
662 | /* Use fx_offset for these cases */ | |
663 | if ( fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY | |
664 | || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT) | |
665 | reloc->addend = fixP->fx_offset; | |
666 | else | |
667 | reloc->addend = fixP->fx_addnumber; | |
668 | ||
669 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
670 | return reloc; | |
671 | } |