Commit | Line | Data |
---|---|---|
841eff9e | 1 | /* GAS interface for targets using CGEN: Cpu tools GENerator. |
95effc2b | 2 | Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. |
841eff9e DE |
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 | ||
1002d8ed | 20 | #include <setjmp.h> |
841eff9e DE |
21 | #include "ansidecl.h" |
22 | #include "bfd.h" | |
23 | #include "cgen-opc.h" | |
24 | #include "as.h" | |
25 | #include "subsegs.h" | |
26 | ||
27 | /* Callback to insert a register into the symbol table. | |
28 | A target may choose to let GAS parse the registers. | |
29 | ??? Not currently used. */ | |
30 | ||
31 | void | |
32 | cgen_asm_record_register (name, number) | |
ebde3f62 NC |
33 | char * name; |
34 | int number; | |
841eff9e DE |
35 | { |
36 | /* Use symbol_create here instead of symbol_new so we don't try to | |
37 | output registers into the object file's symbol table. */ | |
38 | symbol_table_insert (symbol_create (name, reg_section, | |
ebde3f62 | 39 | number, & zero_address_frag)); |
841eff9e DE |
40 | } |
41 | ||
42 | /* We need to keep a list of fixups. We can't simply generate them as | |
43 | we go, because that would require us to first create the frag, and | |
44 | that would screw up references to ``.''. | |
45 | ||
46 | This is used by cpu's with simple operands. It keeps knowledge of what | |
47 | an `expressionS' is and what a `fixup' is out of CGEN which for the time | |
48 | being is preferable. | |
49 | ||
50 | OPINDEX is the index in the operand table. | |
51 | OPINFO is something the caller chooses to help in reloc determination. */ | |
52 | ||
53 | struct fixup | |
54 | { | |
ebde3f62 NC |
55 | int opindex; |
56 | int opinfo; | |
841eff9e DE |
57 | expressionS exp; |
58 | }; | |
59 | ||
60 | #define MAX_FIXUPS 5 | |
61 | ||
ebde3f62 NC |
62 | static struct fixup fixups [MAX_FIXUPS]; |
63 | static int num_fixups; | |
841eff9e | 64 | |
f3f00e94 DE |
65 | /* Prepare to parse an instruction. |
66 | ??? May wish to make this static and delete calls in md_assemble. */ | |
67 | ||
841eff9e DE |
68 | void |
69 | cgen_asm_init_parse () | |
70 | { | |
71 | num_fixups = 0; | |
72 | } | |
73 | ||
74 | /* Queue a fixup. */ | |
75 | ||
95effc2b | 76 | static void |
841eff9e | 77 | cgen_queue_fixup (opindex, opinfo, expP) |
ebde3f62 NC |
78 | int opindex; |
79 | expressionS * expP; | |
841eff9e DE |
80 | { |
81 | /* We need to generate a fixup for this expression. */ | |
82 | if (num_fixups >= MAX_FIXUPS) | |
83 | as_fatal ("too many fixups"); | |
ebde3f62 | 84 | fixups[num_fixups].exp = * expP; |
841eff9e | 85 | fixups[num_fixups].opindex = opindex; |
ebde3f62 NC |
86 | fixups[num_fixups].opinfo = opinfo; |
87 | ++ num_fixups; | |
841eff9e DE |
88 | } |
89 | ||
95effc2b DE |
90 | /* The following three functions allow a backup of the fixup chain to be made, |
91 | and to have this backup be swapped with the current chain. This allows | |
92 | certain ports, eg the m32r, to swap two instructions and swap their fixups | |
93 | at the same time. */ | |
94 | static struct fixup saved_fixups [MAX_FIXUPS]; | |
95 | static int saved_num_fixups; | |
96 | ||
97 | void | |
98 | cgen_save_fixups () | |
99 | { | |
100 | saved_num_fixups = num_fixups; | |
101 | ||
102 | memcpy (saved_fixups, fixups, sizeof (fixups[0]) * num_fixups); | |
103 | ||
104 | num_fixups = 0; | |
105 | } | |
106 | ||
107 | void | |
108 | cgen_restore_fixups () | |
109 | { | |
110 | num_fixups = saved_num_fixups; | |
111 | ||
112 | memcpy (fixups, saved_fixups, sizeof (fixups[0]) * num_fixups); | |
113 | ||
114 | saved_num_fixups = 0; | |
115 | } | |
116 | ||
117 | void | |
118 | cgen_swap_fixups () | |
119 | { | |
120 | int tmp; | |
121 | struct fixup tmp_fixup; | |
122 | ||
123 | if (num_fixups == 0) | |
124 | { | |
125 | cgen_restore_fixups (); | |
126 | } | |
127 | else if (saved_num_fixups == 0) | |
128 | { | |
129 | cgen_save_fixups (); | |
130 | } | |
131 | else | |
132 | { | |
133 | tmp = saved_num_fixups; | |
134 | saved_num_fixups = num_fixups; | |
135 | num_fixups = tmp; | |
136 | ||
137 | for (tmp = MAX_FIXUPS; tmp--;) | |
138 | { | |
139 | tmp_fixup = saved_fixups [tmp]; | |
140 | saved_fixups [tmp] = fixups [tmp]; | |
141 | fixups [tmp] = tmp_fixup; | |
142 | } | |
143 | } | |
144 | } | |
145 | ||
841eff9e DE |
146 | /* Default routine to record a fixup. |
147 | This is a cover function to fix_new. | |
148 | It exists because we record INSN with the fixup. | |
149 | ||
150 | FRAG and WHERE are their respective arguments to fix_new_exp. | |
151 | LENGTH is in bits. | |
152 | OPINFO is something the caller chooses to help in reloc determination. | |
153 | ||
154 | At this point we do not use a bfd_reloc_code_real_type for | |
155 | operands residing in the insn, but instead just use the | |
156 | operand index. This lets us easily handle fixups for any | |
157 | operand type. We pick a BFD reloc type in md_apply_fix. */ | |
158 | ||
159 | fixS * | |
160 | cgen_record_fixup (frag, where, insn, length, operand, opinfo, symbol, offset) | |
ebde3f62 NC |
161 | fragS * frag; |
162 | int where; | |
163 | const CGEN_INSN * insn; | |
164 | int length; | |
165 | const CGEN_OPERAND * operand; | |
166 | int opinfo; | |
167 | symbolS * symbol; | |
168 | offsetT offset; | |
841eff9e | 169 | { |
ebde3f62 | 170 | fixS * fixP; |
841eff9e DE |
171 | |
172 | /* It may seem strange to use operand->attrs and not insn->attrs here, | |
173 | but it is the operand that has a pc relative relocation. */ | |
174 | ||
175 | fixP = fix_new (frag, where, length / 8, symbol, offset, | |
176 | CGEN_OPERAND_ATTR (operand, CGEN_OPERAND_PCREL_ADDR) != 0, | |
177 | (bfd_reloc_code_real_type) ((int) BFD_RELOC_UNUSED + CGEN_OPERAND_INDEX (operand))); | |
ebde3f62 | 178 | fixP->tc_fix_data.insn = (PTR) insn; |
841eff9e DE |
179 | fixP->tc_fix_data.opinfo = opinfo; |
180 | ||
181 | return fixP; | |
182 | } | |
183 | ||
184 | /* Default routine to record a fixup given an expression. | |
185 | This is a cover function to fix_new_exp. | |
186 | It exists because we record INSN with the fixup. | |
187 | ||
188 | FRAG and WHERE are their respective arguments to fix_new_exp. | |
189 | LENGTH is in bits. | |
190 | OPINFO is something the caller chooses to help in reloc determination. | |
191 | ||
192 | At this point we do not use a bfd_reloc_code_real_type for | |
193 | operands residing in the insn, but instead just use the | |
194 | operand index. This lets us easily handle fixups for any | |
195 | operand type. We pick a BFD reloc type in md_apply_fix. */ | |
196 | ||
197 | fixS * | |
198 | cgen_record_fixup_exp (frag, where, insn, length, operand, opinfo, exp) | |
ebde3f62 NC |
199 | fragS * frag; |
200 | int where; | |
201 | const CGEN_INSN * insn; | |
202 | int length; | |
203 | const CGEN_OPERAND * operand; | |
204 | int opinfo; | |
205 | expressionS * exp; | |
841eff9e | 206 | { |
ebde3f62 | 207 | fixS * fixP; |
841eff9e DE |
208 | |
209 | /* It may seem strange to use operand->attrs and not insn->attrs here, | |
210 | but it is the operand that has a pc relative relocation. */ | |
211 | ||
212 | fixP = fix_new_exp (frag, where, length / 8, exp, | |
213 | CGEN_OPERAND_ATTR (operand, CGEN_OPERAND_PCREL_ADDR) != 0, | |
214 | (bfd_reloc_code_real_type) ((int) BFD_RELOC_UNUSED + CGEN_OPERAND_INDEX (operand))); | |
215 | fixP->tc_fix_data.insn = (PTR) insn; | |
216 | fixP->tc_fix_data.opinfo = opinfo; | |
217 | ||
218 | return fixP; | |
219 | } | |
220 | ||
1002d8ed DE |
221 | /* Used for communication between the next two procedures. */ |
222 | static jmp_buf expr_jmp_buf; | |
223 | ||
841eff9e DE |
224 | /* Callback for cgen interface. Parse the expression at *STRP. |
225 | The result is an error message or NULL for success (in which case | |
226 | *STRP is advanced past the parsed text). | |
f3f00e94 DE |
227 | WANT is an indication of what the caller is looking for. |
228 | If WANT == CGEN_ASM_PARSE_INIT the caller is beginning to try to match | |
229 | a table entry with the insn, reset the queued fixups counter. | |
230 | An enum cgen_parse_operand_result is stored in RESULTP. | |
231 | OPINDEX is the operand's table entry index. | |
841eff9e DE |
232 | OPINFO is something the caller chooses to help in reloc determination. |
233 | The resulting value is stored in VALUEP. */ | |
234 | ||
235 | const char * | |
f3f00e94 | 236 | cgen_parse_operand (want, strP, opindex, opinfo, resultP, valueP) |
ebde3f62 NC |
237 | enum cgen_parse_operand_type want; |
238 | const char ** strP; | |
239 | int opindex; | |
240 | int opinfo; | |
241 | enum cgen_parse_operand_result * resultP; | |
242 | bfd_vma * valueP; | |
841eff9e | 243 | { |
1002d8ed DE |
244 | #ifdef __STDC__ |
245 | /* These is volatile to survive the setjmp. */ | |
ebde3f62 | 246 | char * volatile hold; |
1002d8ed DE |
247 | enum cgen_parse_operand_result * volatile resultP_1; |
248 | #else | |
ebde3f62 NC |
249 | static char * hold; |
250 | static enum cgen_parse_operand_result * resultP_1; | |
1002d8ed | 251 | #endif |
ebde3f62 NC |
252 | const char * errmsg = NULL; |
253 | expressionS exp; | |
841eff9e | 254 | |
f3f00e94 DE |
255 | if (want == CGEN_PARSE_OPERAND_INIT) |
256 | { | |
257 | cgen_asm_init_parse (); | |
258 | return NULL; | |
259 | } | |
260 | ||
1002d8ed | 261 | resultP_1 = resultP; |
841eff9e | 262 | hold = input_line_pointer; |
ebde3f62 | 263 | input_line_pointer = (char *) * strP; |
1002d8ed DE |
264 | |
265 | /* We rely on md_operand to longjmp back to us. | |
266 | This is done via cgen_md_operand. */ | |
267 | if (setjmp (expr_jmp_buf) != 0) | |
268 | { | |
269 | input_line_pointer = (char *) hold; | |
ebde3f62 | 270 | * resultP_1 = CGEN_PARSE_OPERAND_RESULT_ERROR; |
1002d8ed DE |
271 | return "illegal operand"; |
272 | } | |
273 | ||
ebde3f62 | 274 | expression (& exp); |
1002d8ed | 275 | |
ebde3f62 | 276 | * strP = input_line_pointer; |
841eff9e DE |
277 | input_line_pointer = hold; |
278 | ||
f3f00e94 DE |
279 | /* FIXME: Need to check `want'. */ |
280 | ||
841eff9e DE |
281 | switch (exp.X_op) |
282 | { | |
283 | case O_illegal : | |
284 | errmsg = "illegal operand"; | |
ebde3f62 | 285 | * resultP = CGEN_PARSE_OPERAND_RESULT_ERROR; |
841eff9e DE |
286 | break; |
287 | case O_absent : | |
288 | errmsg = "missing operand"; | |
ebde3f62 | 289 | * resultP = CGEN_PARSE_OPERAND_RESULT_ERROR; |
841eff9e DE |
290 | break; |
291 | case O_constant : | |
ebde3f62 NC |
292 | * valueP = exp.X_add_number; |
293 | * resultP = CGEN_PARSE_OPERAND_RESULT_NUMBER; | |
841eff9e DE |
294 | break; |
295 | case O_register : | |
ebde3f62 NC |
296 | * valueP = exp.X_add_number; |
297 | * resultP = CGEN_PARSE_OPERAND_RESULT_REGISTER; | |
841eff9e DE |
298 | break; |
299 | default : | |
ebde3f62 NC |
300 | cgen_queue_fixup (opindex, opinfo, & exp); |
301 | * valueP = 0; | |
302 | * resultP = CGEN_PARSE_OPERAND_RESULT_QUEUED; | |
841eff9e DE |
303 | break; |
304 | } | |
305 | ||
306 | return errmsg; | |
307 | } | |
308 | ||
1002d8ed DE |
309 | /* md_operand handler to catch unrecognized expressions and halt the |
310 | parsing process so the next entry can be tried. | |
311 | ||
312 | ??? This could be done differently by adding code to `expression'. */ | |
313 | ||
314 | void | |
315 | cgen_md_operand (expressionP) | |
ebde3f62 | 316 | expressionS * expressionP; |
1002d8ed DE |
317 | { |
318 | longjmp (expr_jmp_buf, 1); | |
319 | } | |
320 | ||
841eff9e DE |
321 | /* Finish assembling instruction INSN. |
322 | BUF contains what we've built up so far. | |
95effc2b DE |
323 | LENGTH is the size of the insn in bits. |
324 | Returns the address of the buffer containing the assembled instruction, | |
325 | in case the caller needs to modify it for some reason. */ | |
841eff9e | 326 | |
95effc2b | 327 | char * |
841eff9e | 328 | cgen_asm_finish_insn (insn, buf, length) |
ebde3f62 NC |
329 | const CGEN_INSN * insn; |
330 | cgen_insn_t * buf; | |
331 | unsigned int length; | |
841eff9e | 332 | { |
ebde3f62 NC |
333 | int i; |
334 | int relax_operand; | |
335 | char * f; | |
841eff9e DE |
336 | unsigned int byte_len = length / 8; |
337 | ||
338 | /* ??? Target foo issues various warnings here, so one might want to provide | |
339 | a hook here. However, our caller is defined in tc-foo.c so there | |
340 | shouldn't be a need for a hook. */ | |
95effc2b | 341 | |
841eff9e DE |
342 | /* Write out the instruction. |
343 | It is important to fetch enough space in one call to `frag_more'. | |
344 | We use (f - frag_now->fr_literal) to compute where we are and we | |
345 | don't want frag_now to change between calls. | |
346 | ||
347 | Relaxable instructions: We need to ensure we allocate enough | |
348 | space for the largest insn. */ | |
349 | ||
350 | if (CGEN_INSN_ATTR (insn, CGEN_INSN_RELAX) != 0) | |
351 | abort (); /* These currently shouldn't get here. */ | |
352 | ||
353 | /* Is there a relaxable insn with the relaxable operand needing a fixup? */ | |
354 | ||
355 | relax_operand = -1; | |
356 | if (CGEN_INSN_ATTR (insn, CGEN_INSN_RELAXABLE) != 0) | |
357 | { | |
358 | /* Scan the fixups for the operand affected by relaxing | |
359 | (i.e. the branch address). */ | |
360 | ||
ebde3f62 | 361 | for (i = 0; i < num_fixups; ++ i) |
841eff9e DE |
362 | { |
363 | if (CGEN_OPERAND_ATTR (& CGEN_SYM (operand_table) [fixups[i].opindex], | |
364 | CGEN_OPERAND_RELAX) != 0) | |
365 | { | |
366 | relax_operand = i; | |
367 | break; | |
368 | } | |
369 | } | |
370 | } | |
371 | ||
372 | if (relax_operand != -1) | |
373 | { | |
ebde3f62 NC |
374 | int max_len; |
375 | fragS * old_frag; | |
841eff9e DE |
376 | |
377 | #ifdef TC_CGEN_MAX_RELAX | |
378 | max_len = TC_CGEN_MAX_RELAX (insn, byte_len); | |
379 | #else | |
380 | max_len = CGEN_MAX_INSN_SIZE; | |
381 | #endif | |
382 | /* Ensure variable part and fixed part are in same fragment. */ | |
383 | /* FIXME: Having to do this seems like a hack. */ | |
384 | frag_grow (max_len); | |
ebde3f62 | 385 | |
841eff9e DE |
386 | /* Allocate space for the fixed part. */ |
387 | f = frag_more (byte_len); | |
ebde3f62 | 388 | |
841eff9e DE |
389 | /* Create a relaxable fragment for this instruction. */ |
390 | old_frag = frag_now; | |
95effc2b | 391 | |
841eff9e DE |
392 | frag_var (rs_machine_dependent, |
393 | max_len - byte_len /* max chars */, | |
394 | 0 /* variable part already allocated */, | |
395 | /* FIXME: When we machine generate the relax table, | |
396 | machine generate a macro to compute subtype. */ | |
397 | 1 /* subtype */, | |
398 | fixups[relax_operand].exp.X_add_symbol, | |
399 | fixups[relax_operand].exp.X_add_number, | |
400 | f); | |
ebde3f62 | 401 | |
841eff9e DE |
402 | /* Record the operand number with the fragment so md_convert_frag |
403 | can use cgen_md_record_fixup to record the appropriate reloc. */ | |
ebde3f62 | 404 | old_frag->fr_cgen.insn = insn; |
1002d8ed | 405 | old_frag->fr_cgen.opindex = fixups[relax_operand].opindex; |
ebde3f62 | 406 | old_frag->fr_cgen.opinfo = fixups[relax_operand].opinfo; |
841eff9e DE |
407 | } |
408 | else | |
409 | f = frag_more (byte_len); | |
410 | ||
411 | /* If we're recording insns as numbers (rather than a string of bytes), | |
412 | target byte order handling is deferred until now. */ | |
413 | #if 0 /*def CGEN_INT_INSN*/ | |
414 | switch (length) | |
415 | { | |
416 | case 16: | |
417 | if (cgen_big_endian_p) | |
ebde3f62 | 418 | bfd_putb16 ((bfd_vma) * buf, f); |
841eff9e | 419 | else |
ebde3f62 | 420 | bfd_putl16 ((bfd_vma) * buf, f); |
841eff9e DE |
421 | break; |
422 | case 32: | |
423 | if (cgen_big_endian_p) | |
ebde3f62 | 424 | bfd_putb32 ((bfd_vma) * buf, f); |
841eff9e | 425 | else |
ebde3f62 | 426 | bfd_putl32 ((bfd_vma) * buf, f); |
841eff9e DE |
427 | break; |
428 | default: | |
429 | abort (); | |
430 | } | |
431 | #else | |
432 | memcpy (f, buf, byte_len); | |
433 | #endif | |
434 | ||
435 | /* Create any fixups. */ | |
436 | for (i = 0; i < num_fixups; ++i) | |
437 | { | |
438 | /* Don't create fixups for these. That's done during relaxation. | |
439 | We don't need to test for CGEN_INSN_RELAX as they can't get here | |
440 | (see above). */ | |
441 | if (CGEN_INSN_ATTR (insn, CGEN_INSN_RELAXABLE) != 0 | |
442 | && CGEN_OPERAND_ATTR (& CGEN_SYM (operand_table) [fixups[i].opindex], | |
443 | CGEN_OPERAND_RELAX) != 0) | |
444 | continue; | |
445 | ||
446 | #ifndef md_cgen_record_fixup_exp | |
447 | #define md_cgen_record_fixup_exp cgen_record_fixup_exp | |
448 | #endif | |
449 | ||
450 | md_cgen_record_fixup_exp (frag_now, f - frag_now->fr_literal, | |
451 | insn, length, | |
452 | & CGEN_SYM (operand_table) [fixups[i].opindex], | |
453 | fixups[i].opinfo, | |
ebde3f62 | 454 | & fixups[i].exp); |
841eff9e | 455 | } |
95effc2b DE |
456 | |
457 | return f; | |
841eff9e DE |
458 | } |
459 | ||
460 | /* Apply a fixup to the object code. This is called for all the | |
461 | fixups we generated by the call to fix_new_exp, above. In the call | |
462 | above we used a reloc code which was the largest legal reloc code | |
463 | plus the operand index. Here we undo that to recover the operand | |
464 | index. At this point all symbol values should be fully resolved, | |
465 | and we attempt to completely resolve the reloc. If we can not do | |
466 | that, we determine the correct reloc code and put it back in the fixup. */ | |
467 | ||
468 | /* FIXME: This function handles some of the fixups and bfd_install_relocation | |
469 | handles the rest. bfd_install_relocation (or some other bfd function) | |
470 | should handle them all. */ | |
471 | ||
472 | int | |
473 | cgen_md_apply_fix3 (fixP, valueP, seg) | |
ebde3f62 NC |
474 | fixS * fixP; |
475 | valueT * valueP; | |
476 | segT seg; | |
841eff9e | 477 | { |
ebde3f62 NC |
478 | char * where = fixP->fx_frag->fr_literal + fixP->fx_where; |
479 | valueT value; | |
841eff9e DE |
480 | |
481 | /* FIXME FIXME FIXME: The value we are passed in *valuep includes | |
482 | the symbol values. Since we are using BFD_ASSEMBLER, if we are | |
483 | doing this relocation the code in write.c is going to call | |
484 | bfd_install_relocation, which is also going to use the symbol | |
485 | value. That means that if the reloc is fully resolved we want to | |
486 | use *valuep since bfd_install_relocation is not being used. | |
487 | However, if the reloc is not fully resolved we do not want to use | |
488 | *valuep, and must use fx_offset instead. However, if the reloc | |
489 | is PC relative, we do want to use *valuep since it includes the | |
490 | result of md_pcrel_from. This is confusing. */ | |
491 | ||
492 | if (fixP->fx_addsy == (symbolS *) NULL) | |
493 | { | |
ebde3f62 | 494 | value = * valueP; |
841eff9e DE |
495 | fixP->fx_done = 1; |
496 | } | |
497 | else if (fixP->fx_pcrel) | |
ebde3f62 | 498 | value = * valueP; |
841eff9e DE |
499 | else |
500 | { | |
501 | value = fixP->fx_offset; | |
502 | if (fixP->fx_subsy != (symbolS *) NULL) | |
503 | { | |
504 | if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section) | |
505 | value -= S_GET_VALUE (fixP->fx_subsy); | |
506 | else | |
507 | { | |
508 | /* We don't actually support subtracting a symbol. */ | |
509 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
510 | "expression too complex"); | |
511 | } | |
512 | } | |
513 | } | |
514 | ||
515 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) | |
516 | { | |
ebde3f62 NC |
517 | int opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; |
518 | const CGEN_OPERAND * operand = & CGEN_SYM (operand_table) [opindex]; | |
519 | const char * errmsg; | |
841eff9e | 520 | bfd_reloc_code_real_type reloc_type; |
ebde3f62 NC |
521 | CGEN_FIELDS fields; |
522 | const CGEN_INSN * insn = (CGEN_INSN *) fixP->tc_fix_data.insn; | |
841eff9e DE |
523 | |
524 | /* If the reloc has been fully resolved finish the operand here. */ | |
525 | /* FIXME: This duplicates the capabilities of code in BFD. */ | |
526 | if (fixP->fx_done | |
527 | /* FIXME: If partial_inplace isn't set bfd_install_relocation won't | |
528 | finish the job. Testing for pcrel is a temporary hack. */ | |
529 | || fixP->fx_pcrel) | |
530 | { | |
531 | /* This may seem like overkill, and using bfd_install_relocation or | |
532 | some such may be preferable, but this is simple. */ | |
ebde3f62 NC |
533 | CGEN_FIELDS_BITSIZE (& fields) = CGEN_INSN_BITSIZE (insn); |
534 | CGEN_SYM (set_operand) (opindex, & value, & fields); | |
535 | errmsg = CGEN_SYM (validate_operand) (opindex, & fields); | |
841eff9e DE |
536 | if (errmsg) |
537 | as_warn_where (fixP->fx_file, fixP->fx_line, "%s\n", errmsg); | |
ebde3f62 | 538 | CGEN_SYM (insert_operand) (opindex, & fields, where); |
841eff9e DE |
539 | } |
540 | ||
541 | if (fixP->fx_done) | |
542 | return 1; | |
543 | ||
544 | /* The operand isn't fully resolved. Determine a BFD reloc value | |
545 | based on the operand information and leave it to | |
546 | bfd_install_relocation. Note that this doesn't work when | |
547 | partial_inplace == false. */ | |
548 | ||
549 | reloc_type = CGEN_SYM (lookup_reloc) (insn, operand, fixP); | |
550 | if (reloc_type != BFD_RELOC_NONE) | |
551 | { | |
552 | fixP->fx_r_type = reloc_type; | |
553 | } | |
554 | else | |
555 | { | |
556 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
557 | "unresolved expression that must be resolved"); | |
558 | fixP->fx_done = 1; | |
559 | return 1; | |
560 | } | |
561 | } | |
562 | else if (fixP->fx_done) | |
563 | { | |
564 | /* We're finished with this fixup. Install it because | |
565 | bfd_install_relocation won't be called to do it. */ | |
566 | switch (fixP->fx_r_type) | |
567 | { | |
568 | case BFD_RELOC_8: | |
569 | md_number_to_chars (where, value, 1); | |
570 | break; | |
571 | case BFD_RELOC_16: | |
572 | md_number_to_chars (where, value, 2); | |
573 | break; | |
574 | case BFD_RELOC_32: | |
575 | md_number_to_chars (where, value, 4); | |
576 | break; | |
577 | /* FIXME: later add support for 64 bits. */ | |
578 | default: | |
579 | abort (); | |
580 | } | |
581 | } | |
582 | else | |
583 | { | |
584 | /* bfd_install_relocation will be called to finish things up. */ | |
585 | } | |
586 | ||
587 | /* Tuck `value' away for use by tc_gen_reloc. | |
588 | See the comment describing fx_addnumber in write.h. | |
589 | This field is misnamed (or misused :-). */ | |
590 | fixP->fx_addnumber = value; | |
591 | ||
592 | return 1; | |
593 | } | |
594 | ||
595 | /* Translate internal representation of relocation info to BFD target format. | |
596 | ||
597 | FIXME: To what extent can we get all relevant targets to use this? */ | |
598 | ||
599 | arelent * | |
600 | cgen_tc_gen_reloc (section, fixP) | |
ebde3f62 NC |
601 | asection * section; |
602 | fixS * fixP; | |
841eff9e | 603 | { |
ebde3f62 | 604 | arelent * reloc; |
841eff9e | 605 | |
1002d8ed | 606 | reloc = (arelent *) bfd_alloc (stdoutput, sizeof (arelent)); |
841eff9e DE |
607 | |
608 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); | |
609 | if (reloc->howto == (reloc_howto_type *) NULL) | |
610 | { | |
611 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
612 | "internal error: can't export reloc type %d (`%s')", | |
613 | fixP->fx_r_type, bfd_get_reloc_code_name (fixP->fx_r_type)); | |
614 | return NULL; | |
615 | } | |
616 | ||
617 | assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); | |
618 | ||
ebde3f62 NC |
619 | reloc->sym_ptr_ptr = & fixP->fx_addsy->bsym; |
620 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
621 | reloc->addend = fixP->fx_addnumber; | |
841eff9e DE |
622 | |
623 | return reloc; | |
624 | } |