Commit | Line | Data |
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252b5132 | 1 | /* GAS interface for targets using CGEN: Cpu tools GENerator. |
272d76e0 | 2 | Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 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 | |
542d6675 | 18 | Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
252b5132 RH |
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" | |
272d76e0 | 29 | #include "dwarf2dbg.h" |
252b5132 RH |
30 | |
31 | /* Opcode table descriptor, must be set by md_begin. */ | |
32 | ||
33 | CGEN_CPU_DESC gas_cgen_cpu_desc; | |
34 | ||
35 | /* Callback to insert a register into the symbol table. | |
36 | A target may choose to let GAS parse the registers. | |
37 | ??? Not currently used. */ | |
38 | ||
39 | void | |
40 | cgen_asm_record_register (name, number) | |
542d6675 | 41 | char *name; |
252b5132 RH |
42 | int number; |
43 | { | |
44 | /* Use symbol_create here instead of symbol_new so we don't try to | |
45 | output registers into the object file's symbol table. */ | |
46 | symbol_table_insert (symbol_create (name, reg_section, | |
542d6675 | 47 | number, &zero_address_frag)); |
252b5132 RH |
48 | } |
49 | ||
50 | /* We need to keep a list of fixups. We can't simply generate them as | |
51 | we go, because that would require us to first create the frag, and | |
52 | that would screw up references to ``.''. | |
53 | ||
54 | This is used by cpu's with simple operands. It keeps knowledge of what | |
55 | an `expressionS' is and what a `fixup' is out of CGEN which for the time | |
56 | being is preferable. | |
57 | ||
58 | OPINDEX is the index in the operand table. | |
59 | OPINFO is something the caller chooses to help in reloc determination. */ | |
60 | ||
30a2b4ef | 61 | struct fixup { |
252b5132 RH |
62 | int opindex; |
63 | int opinfo; | |
64 | expressionS exp; | |
65 | }; | |
66 | ||
542d6675 | 67 | static struct fixup fixups[GAS_CGEN_MAX_FIXUPS]; |
252b5132 RH |
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")); | |
30a2b4ef | 90 | fixups[num_fixups].exp = *expP; |
252b5132 RH |
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 | ||
542d6675 | 103 | static struct fixup saved_fixups[GAS_CGEN_MAX_FIXUPS]; |
252b5132 RH |
104 | static int saved_num_fixups; |
105 | ||
106 | void | |
107 | gas_cgen_save_fixups () | |
108 | { | |
109 | saved_num_fixups = num_fixups; | |
542d6675 | 110 | |
252b5132 RH |
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; | |
542d6675 | 120 | |
252b5132 RH |
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; | |
542d6675 | 145 | |
252b5132 RH |
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 | { | |
542d6675 | 179 | fixS *fixP; |
252b5132 RH |
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 | { | |
542d6675 | 218 | fixS *fixP; |
252b5132 RH |
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 | 252 | enum cgen_parse_operand_type want; |
542d6675 | 253 | const char **strP; |
252b5132 RH |
254 | int opindex; |
255 | int opinfo; | |
542d6675 KH |
256 | enum cgen_parse_operand_result *resultP; |
257 | bfd_vma *valueP; | |
252b5132 RH |
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 | |
542d6675 KH |
264 | static char *hold; |
265 | static enum cgen_parse_operand_result *resultP_1; | |
252b5132 | 266 | #endif |
542d6675 | 267 | const char *errmsg = NULL; |
252b5132 RH |
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; | |
542d6675 | 278 | input_line_pointer = (char *) *strP; |
252b5132 RH |
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 | 285 | input_line_pointer = (char *) hold; |
542d6675 | 286 | *resultP_1 = CGEN_PARSE_OPERAND_RESULT_ERROR; |
252b5132 RH |
287 | return "illegal operand"; |
288 | } | |
289 | ||
680d2857 | 290 | expr_jmp_buf_p = 1; |
542d6675 | 291 | expression (&exp); |
680d2857 | 292 | expr_jmp_buf_p = 0; |
252b5132 | 293 | |
542d6675 | 294 | *strP = input_line_pointer; |
252b5132 RH |
295 | input_line_pointer = hold; |
296 | ||
297 | /* FIXME: Need to check `want'. */ | |
298 | ||
299 | switch (exp.X_op) | |
300 | { | |
542d6675 | 301 | case O_illegal: |
252b5132 | 302 | errmsg = _("illegal operand"); |
542d6675 | 303 | *resultP = CGEN_PARSE_OPERAND_RESULT_ERROR; |
252b5132 | 304 | break; |
542d6675 | 305 | case O_absent: |
252b5132 | 306 | errmsg = _("missing operand"); |
542d6675 | 307 | *resultP = CGEN_PARSE_OPERAND_RESULT_ERROR; |
252b5132 | 308 | break; |
542d6675 KH |
309 | case O_constant: |
310 | *valueP = exp.X_add_number; | |
311 | *resultP = CGEN_PARSE_OPERAND_RESULT_NUMBER; | |
252b5132 | 312 | break; |
542d6675 KH |
313 | case O_register: |
314 | *valueP = exp.X_add_number; | |
315 | *resultP = CGEN_PARSE_OPERAND_RESULT_REGISTER; | |
252b5132 | 316 | break; |
542d6675 | 317 | default: |
30a2b4ef | 318 | queue_fixup (opindex, opinfo, &exp); |
542d6675 KH |
319 | *valueP = 0; |
320 | *resultP = CGEN_PARSE_OPERAND_RESULT_QUEUED; | |
252b5132 RH |
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) | |
542d6675 | 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) | |
542d6675 | 350 | const CGEN_INSN *insn; |
252b5132 RH |
351 | CGEN_INSN_BYTES_PTR buf; |
352 | unsigned int length; | |
353 | int relax_p; | |
542d6675 | 354 | finished_insnS *result; |
252b5132 RH |
355 | { |
356 | int i; | |
357 | int relax_operand; | |
542d6675 | 358 | char *f; |
252b5132 RH |
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)) | |
542d6675 KH |
374 | /* These currently shouldn't get here. */ |
375 | abort (); | |
252b5132 RH |
376 | |
377 | /* Is there a relaxable insn with the relaxable operand needing a fixup? */ | |
378 | ||
379 | relax_operand = -1; | |
380 | if (relax_p && CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXABLE)) | |
381 | { | |
382 | /* Scan the fixups for the operand affected by relaxing | |
383 | (i.e. the branch address). */ | |
384 | ||
542d6675 | 385 | for (i = 0; i < num_fixups; ++i) |
252b5132 RH |
386 | { |
387 | if (CGEN_OPERAND_ATTR_VALUE (cgen_operand_lookup_by_num (gas_cgen_cpu_desc, fixups[i].opindex), | |
388 | CGEN_OPERAND_RELAX)) | |
389 | { | |
390 | relax_operand = i; | |
391 | break; | |
392 | } | |
393 | } | |
394 | } | |
395 | ||
396 | if (relax_operand != -1) | |
397 | { | |
398 | int max_len; | |
542d6675 | 399 | fragS *old_frag; |
252b5132 RH |
400 | |
401 | #ifdef TC_CGEN_MAX_RELAX | |
402 | max_len = TC_CGEN_MAX_RELAX (insn, byte_len); | |
403 | #else | |
404 | max_len = CGEN_MAX_INSN_SIZE; | |
405 | #endif | |
406 | /* Ensure variable part and fixed part are in same fragment. */ | |
407 | /* FIXME: Having to do this seems like a hack. */ | |
408 | frag_grow (max_len); | |
409 | ||
410 | /* Allocate space for the fixed part. */ | |
411 | f = frag_more (byte_len); | |
412 | ||
413 | /* Create a relaxable fragment for this instruction. */ | |
414 | old_frag = frag_now; | |
415 | ||
416 | frag_var (rs_machine_dependent, | |
417 | max_len - byte_len /* max chars */, | |
418 | 0 /* variable part already allocated */, | |
419 | /* FIXME: When we machine generate the relax table, | |
420 | machine generate a macro to compute subtype. */ | |
421 | 1 /* subtype */, | |
422 | fixups[relax_operand].exp.X_add_symbol, | |
423 | fixups[relax_operand].exp.X_add_number, | |
424 | f); | |
425 | ||
426 | /* Record the operand number with the fragment so md_convert_frag | |
427 | can use gas_cgen_md_record_fixup to record the appropriate reloc. */ | |
428 | old_frag->fr_cgen.insn = insn; | |
429 | old_frag->fr_cgen.opindex = fixups[relax_operand].opindex; | |
430 | old_frag->fr_cgen.opinfo = fixups[relax_operand].opinfo; | |
431 | if (result) | |
432 | result->frag = old_frag; | |
433 | } | |
434 | else | |
435 | { | |
436 | f = frag_more (byte_len); | |
437 | if (result) | |
438 | result->frag = frag_now; | |
439 | } | |
440 | ||
441 | /* If we're recording insns as numbers (rather than a string of bytes), | |
442 | target byte order handling is deferred until now. */ | |
443 | #if CGEN_INT_INSN_P | |
444 | cgen_put_insn_value (gas_cgen_cpu_desc, f, length, *buf); | |
445 | #else | |
446 | memcpy (f, buf, byte_len); | |
447 | #endif | |
448 | ||
272d76e0 FCE |
449 | /* Emit DWARF2 debugging information. */ |
450 | dwarf2_emit_insn (byte_len); | |
451 | ||
252b5132 RH |
452 | /* Create any fixups. */ |
453 | for (i = 0; i < num_fixups; ++i) | |
454 | { | |
455 | fixS *fixP; | |
456 | const CGEN_OPERAND *operand = | |
457 | cgen_operand_lookup_by_num (gas_cgen_cpu_desc, fixups[i].opindex); | |
458 | ||
459 | /* Don't create fixups for these. That's done during relaxation. | |
460 | We don't need to test for CGEN_INSN_RELAX as they can't get here | |
461 | (see above). */ | |
462 | if (relax_p | |
463 | && CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXABLE) | |
464 | && CGEN_OPERAND_ATTR_VALUE (operand, CGEN_OPERAND_RELAX)) | |
465 | continue; | |
466 | ||
467 | #ifndef md_cgen_record_fixup_exp | |
468 | #define md_cgen_record_fixup_exp gas_cgen_record_fixup_exp | |
469 | #endif | |
470 | ||
542d6675 KH |
471 | fixP = md_cgen_record_fixup_exp (frag_now, f - frag_now->fr_literal, |
472 | insn, length, operand, | |
473 | fixups[i].opinfo, | |
474 | &fixups[i].exp); | |
475 | if (result) | |
476 | result->fixups[i] = fixP; | |
252b5132 RH |
477 | } |
478 | ||
479 | if (result) | |
480 | { | |
481 | result->num_fixups = num_fixups; | |
482 | result->addr = f; | |
483 | } | |
484 | } | |
485 | ||
486 | /* Apply a fixup to the object code. This is called for all the | |
487 | fixups we generated by the call to fix_new_exp, above. In the call | |
488 | above we used a reloc code which was the largest legal reloc code | |
489 | plus the operand index. Here we undo that to recover the operand | |
490 | index. At this point all symbol values should be fully resolved, | |
491 | and we attempt to completely resolve the reloc. If we can not do | |
492 | that, we determine the correct reloc code and put it back in the fixup. */ | |
493 | ||
494 | /* FIXME: This function handles some of the fixups and bfd_install_relocation | |
495 | handles the rest. bfd_install_relocation (or some other bfd function) | |
496 | should handle them all. */ | |
497 | ||
498 | int | |
499 | gas_cgen_md_apply_fix3 (fixP, valueP, seg) | |
500 | fixS * fixP; | |
501 | valueT * valueP; | |
eabed1c0 | 502 | segT seg ATTRIBUTE_UNUSED; |
252b5132 | 503 | { |
542d6675 | 504 | char *where = fixP->fx_frag->fr_literal + fixP->fx_where; |
252b5132 | 505 | valueT value; |
542d6675 | 506 | /* Canonical name, since used a lot. */ |
252b5132 | 507 | CGEN_CPU_DESC cd = gas_cgen_cpu_desc; |
542d6675 | 508 | |
252b5132 RH |
509 | /* FIXME FIXME FIXME: The value we are passed in *valuep includes |
510 | the symbol values. Since we are using BFD_ASSEMBLER, if we are | |
511 | doing this relocation the code in write.c is going to call | |
512 | bfd_install_relocation, which is also going to use the symbol | |
513 | value. That means that if the reloc is fully resolved we want to | |
514 | use *valuep since bfd_install_relocation is not being used. | |
515 | However, if the reloc is not fully resolved we do not want to use | |
516 | *valuep, and must use fx_offset instead. However, if the reloc | |
517 | is PC relative, we do want to use *valuep since it includes the | |
518 | result of md_pcrel_from. This is confusing. */ | |
519 | ||
520 | if (fixP->fx_addsy == (symbolS *) NULL) | |
521 | { | |
542d6675 | 522 | value = *valueP; |
252b5132 RH |
523 | fixP->fx_done = 1; |
524 | } | |
525 | else if (fixP->fx_pcrel) | |
542d6675 | 526 | value = *valueP; |
252b5132 RH |
527 | else |
528 | { | |
529 | value = fixP->fx_offset; | |
530 | if (fixP->fx_subsy != (symbolS *) NULL) | |
531 | { | |
532 | if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section) | |
533 | value -= S_GET_VALUE (fixP->fx_subsy); | |
534 | else | |
535 | { | |
536 | /* We don't actually support subtracting a symbol. */ | |
542d6675 | 537 | as_bad_where (fixP->fx_file, fixP->fx_line, |
252b5132 RH |
538 | _("expression too complex")); |
539 | } | |
540 | } | |
541 | } | |
542 | ||
543 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) | |
544 | { | |
545 | int opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; | |
546 | const CGEN_OPERAND *operand = cgen_operand_lookup_by_num (cd, opindex); | |
547 | const char *errmsg; | |
548 | bfd_reloc_code_real_type reloc_type; | |
549 | CGEN_FIELDS *fields = alloca (CGEN_CPU_SIZEOF_FIELDS (cd)); | |
550 | const CGEN_INSN *insn = fixP->fx_cgen.insn; | |
551 | ||
552 | /* If the reloc has been fully resolved finish the operand here. */ | |
553 | /* FIXME: This duplicates the capabilities of code in BFD. */ | |
554 | if (fixP->fx_done | |
555 | /* FIXME: If partial_inplace isn't set bfd_install_relocation won't | |
556 | finish the job. Testing for pcrel is a temporary hack. */ | |
557 | || fixP->fx_pcrel) | |
558 | { | |
559 | CGEN_CPU_SET_FIELDS_BITSIZE (cd) (fields, CGEN_INSN_BITSIZE (insn)); | |
560 | CGEN_CPU_SET_VMA_OPERAND (cd) (cd, opindex, fields, (bfd_vma) value); | |
561 | ||
562 | #if CGEN_INT_INSN_P | |
563 | { | |
564 | CGEN_INSN_INT insn_value = | |
565 | cgen_get_insn_value (cd, where, CGEN_INSN_BITSIZE (insn)); | |
566 | ||
542d6675 | 567 | /* ??? 0 is passed for `pc'. */ |
252b5132 RH |
568 | errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields, |
569 | &insn_value, (bfd_vma) 0); | |
570 | cgen_put_insn_value (cd, where, CGEN_INSN_BITSIZE (insn), | |
571 | insn_value); | |
572 | } | |
573 | #else | |
542d6675 KH |
574 | /* ??? 0 is passed for `pc'. */ |
575 | errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields, where, | |
576 | (bfd_vma) 0); | |
252b5132 RH |
577 | #endif |
578 | if (errmsg) | |
579 | as_bad_where (fixP->fx_file, fixP->fx_line, "%s", errmsg); | |
580 | } | |
581 | ||
582 | if (fixP->fx_done) | |
583 | return 1; | |
584 | ||
585 | /* The operand isn't fully resolved. Determine a BFD reloc value | |
586 | based on the operand information and leave it to | |
587 | bfd_install_relocation. Note that this doesn't work when | |
588 | partial_inplace == false. */ | |
589 | ||
590 | reloc_type = md_cgen_lookup_reloc (insn, operand, fixP); | |
591 | if (reloc_type != BFD_RELOC_NONE) | |
592 | { | |
593 | fixP->fx_r_type = reloc_type; | |
594 | } | |
595 | else | |
596 | { | |
597 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
598 | _("unresolved expression that must be resolved")); | |
599 | fixP->fx_done = 1; | |
600 | return 1; | |
601 | } | |
602 | } | |
603 | else if (fixP->fx_done) | |
604 | { | |
605 | /* We're finished with this fixup. Install it because | |
606 | bfd_install_relocation won't be called to do it. */ | |
607 | switch (fixP->fx_r_type) | |
608 | { | |
609 | case BFD_RELOC_8: | |
610 | md_number_to_chars (where, value, 1); | |
611 | break; | |
612 | case BFD_RELOC_16: | |
613 | md_number_to_chars (where, value, 2); | |
614 | break; | |
615 | case BFD_RELOC_32: | |
616 | md_number_to_chars (where, value, 4); | |
617 | break; | |
363c574f MG |
618 | case BFD_RELOC_64: |
619 | md_number_to_chars (where, value, 8); | |
620 | break; | |
252b5132 RH |
621 | default: |
622 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
623 | _("internal error: can't install fix for reloc type %d (`%s')"), | |
624 | fixP->fx_r_type, bfd_get_reloc_code_name (fixP->fx_r_type)); | |
625 | break; | |
626 | } | |
627 | } | |
628 | else | |
629 | { | |
630 | /* bfd_install_relocation will be called to finish things up. */ | |
631 | } | |
632 | ||
633 | /* Tuck `value' away for use by tc_gen_reloc. | |
634 | See the comment describing fx_addnumber in write.h. | |
635 | This field is misnamed (or misused :-). */ | |
636 | fixP->fx_addnumber = value; | |
637 | ||
638 | return 1; | |
639 | } | |
640 | ||
641 | /* Translate internal representation of relocation info to BFD target format. | |
642 | ||
643 | FIXME: To what extent can we get all relevant targets to use this? */ | |
644 | ||
645 | arelent * | |
646 | gas_cgen_tc_gen_reloc (section, fixP) | |
eabed1c0 | 647 | asection * section ATTRIBUTE_UNUSED; |
252b5132 RH |
648 | fixS * fixP; |
649 | { | |
542d6675 | 650 | arelent *reloc; |
252b5132 RH |
651 | |
652 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
653 | ||
654 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); | |
655 | if (reloc->howto == (reloc_howto_type *) NULL) | |
656 | { | |
657 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
658 | _("internal error: can't export reloc type %d (`%s')"), | |
659 | fixP->fx_r_type, bfd_get_reloc_code_name (fixP->fx_r_type)); | |
660 | return NULL; | |
661 | } | |
662 | ||
663 | assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); | |
664 | ||
080e41e6 ILT |
665 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
666 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); | |
252b5132 | 667 | |
542d6675 KH |
668 | /* Use fx_offset for these cases. */ |
669 | if (fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY | |
252b5132 | 670 | || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT) |
542d6675 | 671 | reloc->addend = fixP->fx_offset; |
252b5132 | 672 | else |
542d6675 | 673 | reloc->addend = fixP->fx_addnumber; |
252b5132 RH |
674 | |
675 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
676 | return reloc; | |
677 | } |