Commit | Line | Data |
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252b5132 | 1 | /* tc-fr30.c -- Assembler for the Fujitsu FR30. |
a161fe53 | 2 | Copyright 1998, 1999, 2000, 2001, 2002 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 | |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #include <stdio.h> | |
252b5132 | 22 | #include "as.h" |
3882b010 | 23 | #include "safe-ctype.h" |
81d4177b | 24 | #include "subsegs.h" |
252b5132 RH |
25 | #include "symcat.h" |
26 | #include "opcodes/fr30-desc.h" | |
27 | #include "opcodes/fr30-opc.h" | |
28 | #include "cgen.h" | |
29 | ||
30 | /* Structure to hold all of the different components describing | |
31 | an individual instruction. */ | |
32 | typedef struct | |
33 | { | |
34 | const CGEN_INSN * insn; | |
35 | const CGEN_INSN * orig_insn; | |
36 | CGEN_FIELDS fields; | |
37 | #if CGEN_INT_INSN_P | |
38 | CGEN_INSN_INT buffer [1]; | |
39 | #define INSN_VALUE(buf) (*(buf)) | |
40 | #else | |
41 | unsigned char buffer [CGEN_MAX_INSN_SIZE]; | |
42 | #define INSN_VALUE(buf) (buf) | |
43 | #endif | |
44 | char * addr; | |
45 | fragS * frag; | |
46 | int num_fixups; | |
47 | fixS * fixups [GAS_CGEN_MAX_FIXUPS]; | |
48 | int indices [MAX_OPERAND_INSTANCES]; | |
49 | } | |
50 | fr30_insn; | |
51 | ||
52 | const char comment_chars[] = ";"; | |
53 | const char line_comment_chars[] = "#"; | |
54 | const char line_separator_chars[] = "|"; | |
55 | const char EXP_CHARS[] = "eE"; | |
56 | const char FLT_CHARS[] = "dD"; | |
57 | \f | |
58 | #define FR30_SHORTOPTS "" | |
59 | const char * md_shortopts = FR30_SHORTOPTS; | |
60 | ||
61 | struct option md_longopts[] = | |
62 | { | |
63 | {NULL, no_argument, NULL, 0} | |
64 | }; | |
65 | size_t md_longopts_size = sizeof (md_longopts); | |
66 | ||
67 | int | |
68 | md_parse_option (c, arg) | |
33b5881a AM |
69 | int c ATTRIBUTE_UNUSED; |
70 | char *arg ATTRIBUTE_UNUSED; | |
252b5132 RH |
71 | { |
72 | switch (c) | |
73 | { | |
74 | default: | |
75 | return 0; | |
76 | } | |
77 | return 1; | |
78 | } | |
79 | ||
80 | void | |
81 | md_show_usage (stream) | |
82 | FILE * stream; | |
83 | { | |
84 | fprintf (stream, _(" FR30 specific command line options:\n")); | |
81d4177b | 85 | } |
252b5132 RH |
86 | |
87 | /* The target specific pseudo-ops which we support. */ | |
88 | const pseudo_typeS md_pseudo_table[] = | |
89 | { | |
90 | { "word", cons, 4 }, | |
91 | { NULL, NULL, 0 } | |
92 | }; | |
93 | ||
94 | \f | |
95 | void | |
96 | md_begin () | |
97 | { | |
252b5132 | 98 | /* Initialize the `cgen' interface. */ |
81d4177b | 99 | |
252b5132 RH |
100 | /* Set the machine number and endian. */ |
101 | gas_cgen_cpu_desc = fr30_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0, | |
102 | CGEN_CPU_OPEN_ENDIAN, | |
103 | CGEN_ENDIAN_BIG, | |
104 | CGEN_CPU_OPEN_END); | |
105 | fr30_cgen_init_asm (gas_cgen_cpu_desc); | |
106 | ||
107 | /* This is a callback from cgen to gas to parse operands. */ | |
108 | cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand); | |
109 | } | |
110 | ||
111 | void | |
112 | md_assemble (str) | |
33b5881a | 113 | char *str; |
252b5132 RH |
114 | { |
115 | static int last_insn_had_delay_slot = 0; | |
116 | fr30_insn insn; | |
33b5881a | 117 | char *errmsg; |
252b5132 RH |
118 | |
119 | /* Initialize GAS's cgen interface for a new instruction. */ | |
120 | gas_cgen_init_parse (); | |
121 | ||
122 | insn.insn = fr30_cgen_assemble_insn | |
123 | (gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg); | |
81d4177b | 124 | |
252b5132 RH |
125 | if (!insn.insn) |
126 | { | |
127 | as_bad (errmsg); | |
128 | return; | |
129 | } | |
130 | ||
131 | /* Doesn't really matter what we pass for RELAX_P here. */ | |
132 | gas_cgen_finish_insn (insn.insn, insn.buffer, | |
133 | CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL); | |
134 | ||
135 | /* Warn about invalid insns in delay slots. */ | |
136 | if (last_insn_had_delay_slot | |
137 | && CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_NOT_IN_DELAY_SLOT)) | |
138 | as_warn (_("Instruction %s not allowed in a delay slot."), | |
139 | CGEN_INSN_NAME (insn.insn)); | |
140 | ||
141 | last_insn_had_delay_slot | |
142 | = CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_DELAY_SLOT); | |
143 | } | |
144 | ||
145 | /* The syntax in the manual says constants begin with '#'. | |
146 | We just ignore it. */ | |
147 | ||
81d4177b | 148 | void |
252b5132 RH |
149 | md_operand (expressionP) |
150 | expressionS * expressionP; | |
151 | { | |
152 | if (* input_line_pointer == '#') | |
153 | { | |
154 | input_line_pointer ++; | |
155 | expression (expressionP); | |
156 | } | |
157 | } | |
158 | ||
159 | valueT | |
160 | md_section_align (segment, size) | |
161 | segT segment; | |
162 | valueT size; | |
163 | { | |
164 | int align = bfd_get_section_alignment (stdoutput, segment); | |
165 | return ((size + (1 << align) - 1) & (-1 << align)); | |
166 | } | |
167 | ||
168 | symbolS * | |
169 | md_undefined_symbol (name) | |
33b5881a | 170 | char *name ATTRIBUTE_UNUSED; |
252b5132 RH |
171 | { |
172 | return 0; | |
173 | } | |
174 | \f | |
175 | /* Interface to relax_segment. */ | |
176 | ||
177 | /* FIXME: Build table by hand, get it working, then machine generate. */ | |
178 | ||
179 | const relax_typeS md_relax_table[] = | |
180 | { | |
181 | /* The fields are: | |
182 | 1) most positive reach of this state, | |
183 | 2) most negative reach of this state, | |
184 | 3) how many bytes this mode will add to the size of the current frag | |
185 | 4) which index into the table to try if we can't fit into this one. */ | |
186 | ||
187 | /* The first entry must be unused because an `rlx_more' value of zero ends | |
188 | each list. */ | |
189 | {1, 1, 0, 0}, | |
190 | ||
191 | /* The displacement used by GAS is from the end of the 2 byte insn, | |
192 | so we subtract 2 from the following. */ | |
193 | /* 16 bit insn, 8 bit disp -> 10 bit range. | |
194 | This doesn't handle a branch in the right slot at the border: | |
195 | the "& -4" isn't taken into account. It's not important enough to | |
196 | complicate things over it, so we subtract an extra 2 (or + 2 in -ve | |
197 | case). */ | |
198 | {511 - 2 - 2, -512 - 2 + 2, 0, 2 }, | |
199 | /* 32 bit insn, 24 bit disp -> 26 bit range. */ | |
200 | {0x2000000 - 1 - 2, -0x2000000 - 2, 2, 0 }, | |
201 | /* Same thing, but with leading nop for alignment. */ | |
202 | {0x2000000 - 1 - 2, -0x2000000 - 2, 4, 0 } | |
203 | }; | |
204 | ||
33b5881a | 205 | #if 0 |
252b5132 | 206 | long |
c842b53a ILT |
207 | fr30_relax_frag (segment, fragP, stretch) |
208 | segT segment; | |
252b5132 RH |
209 | fragS * fragP; |
210 | long stretch; | |
211 | { | |
212 | /* Address of branch insn. */ | |
213 | long address = fragP->fr_address + fragP->fr_fix - 2; | |
214 | long growth = 0; | |
215 | ||
216 | /* Keep 32 bit insns aligned on 32 bit boundaries. */ | |
217 | if (fragP->fr_subtype == 2) | |
218 | { | |
219 | if ((address & 3) != 0) | |
220 | { | |
221 | fragP->fr_subtype = 3; | |
222 | growth = 2; | |
223 | } | |
224 | } | |
225 | else if (fragP->fr_subtype == 3) | |
226 | { | |
227 | if ((address & 3) == 0) | |
228 | { | |
229 | fragP->fr_subtype = 2; | |
230 | growth = -2; | |
231 | } | |
232 | } | |
233 | else | |
234 | { | |
c842b53a | 235 | growth = relax_frag (segment, fragP, stretch); |
252b5132 RH |
236 | |
237 | /* Long jump on odd halfword boundary? */ | |
238 | if (fragP->fr_subtype == 2 && (address & 3) != 0) | |
239 | { | |
240 | fragP->fr_subtype = 3; | |
241 | growth += 2; | |
242 | } | |
243 | } | |
244 | ||
245 | return growth; | |
246 | } | |
33b5881a | 247 | #endif |
252b5132 RH |
248 | |
249 | /* Return an initial guess of the length by which a fragment must grow to | |
250 | hold a branch to reach its destination. | |
251 | Also updates fr_type/fr_subtype as necessary. | |
252 | ||
253 | Called just before doing relaxation. | |
254 | Any symbol that is now undefined will not become defined. | |
255 | The guess for fr_var is ACTUALLY the growth beyond fr_fix. | |
256 | Whatever we do to grow fr_fix or fr_var contributes to our returned value. | |
257 | Although it may not be explicit in the frag, pretend fr_var starts with a | |
258 | 0 value. */ | |
259 | ||
260 | int | |
261 | md_estimate_size_before_relax (fragP, segment) | |
262 | fragS * fragP; | |
263 | segT segment; | |
264 | { | |
252b5132 RH |
265 | /* The only thing we have to handle here are symbols outside of the |
266 | current segment. They may be undefined or in a different segment in | |
267 | which case linker scripts may place them anywhere. | |
268 | However, we can't finish the fragment here and emit the reloc as insn | |
269 | alignment requirements may move the insn about. */ | |
270 | ||
271 | if (S_GET_SEGMENT (fragP->fr_symbol) != segment) | |
272 | { | |
33b5881a | 273 | #if 0 |
606ab118 | 274 | int old_fr_fix = fragP->fr_fix; |
33b5881a | 275 | #endif |
606ab118 | 276 | |
252b5132 RH |
277 | /* The symbol is undefined in this segment. |
278 | Change the relaxation subtype to the max allowable and leave | |
279 | all further handling to md_convert_frag. */ | |
280 | fragP->fr_subtype = 2; | |
281 | ||
81d4177b | 282 | #if 0 /* Can't use this, but leave in for illustration. */ |
252b5132 RH |
283 | /* Change 16 bit insn to 32 bit insn. */ |
284 | fragP->fr_opcode[0] |= 0x80; | |
285 | ||
286 | /* Increase known (fixed) size of fragment. */ | |
287 | fragP->fr_fix += 2; | |
288 | ||
289 | /* Create a relocation for it. */ | |
290 | fix_new (fragP, old_fr_fix, 4, | |
291 | fragP->fr_symbol, | |
292 | fragP->fr_offset, 1 /* pcrel */, | |
293 | /* FIXME: Can't use a real BFD reloc here. | |
294 | gas_cgen_md_apply_fix3 can't handle it. */ | |
295 | BFD_RELOC_FR30_26_PCREL); | |
296 | ||
297 | /* Mark this fragment as finished. */ | |
298 | frag_wane (fragP); | |
606ab118 | 299 | return fragP->fr_fix - old_fr_fix; |
252b5132 RH |
300 | #else |
301 | { | |
302 | const CGEN_INSN * insn; | |
303 | int i; | |
304 | ||
305 | /* Update the recorded insn. | |
306 | Fortunately we don't have to look very far. | |
307 | FIXME: Change this to record in the instruction the next higher | |
308 | relaxable insn to use. */ | |
309 | for (i = 0, insn = fragP->fr_cgen.insn; i < 4; i++, insn++) | |
310 | { | |
311 | if ((strcmp (CGEN_INSN_MNEMONIC (insn), | |
312 | CGEN_INSN_MNEMONIC (fragP->fr_cgen.insn)) | |
313 | == 0) | |
314 | && CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX)) | |
315 | break; | |
316 | } | |
317 | if (i == 4) | |
318 | abort (); | |
319 | ||
320 | fragP->fr_cgen.insn = insn; | |
321 | return 2; | |
322 | } | |
323 | #endif | |
324 | } | |
325 | ||
606ab118 AM |
326 | /* Return the size of the variable part of the frag. */ |
327 | return md_relax_table[fragP->fr_subtype].rlx_length; | |
81d4177b | 328 | } |
252b5132 RH |
329 | |
330 | /* *fragP has been relaxed to its final size, and now needs to have | |
331 | the bytes inside it modified to conform to the new size. | |
332 | ||
333 | Called after relaxation is finished. | |
334 | fragP->fr_type == rs_machine_dependent. | |
335 | fragP->fr_subtype is the subtype of what the address relaxed to. */ | |
336 | ||
337 | void | |
338 | md_convert_frag (abfd, sec, fragP) | |
33b5881a AM |
339 | bfd *abfd ATTRIBUTE_UNUSED; |
340 | segT sec ATTRIBUTE_UNUSED; | |
341 | fragS *fragP ATTRIBUTE_UNUSED; | |
252b5132 RH |
342 | { |
343 | #if 0 | |
344 | char * opcode; | |
345 | char * displacement; | |
346 | int target_address; | |
347 | int opcode_address; | |
348 | int extension; | |
349 | int addend; | |
350 | ||
351 | opcode = fragP->fr_opcode; | |
352 | ||
353 | /* Address opcode resides at in file space. */ | |
354 | opcode_address = fragP->fr_address + fragP->fr_fix - 2; | |
355 | ||
356 | switch (fragP->fr_subtype) | |
357 | { | |
358 | case 1 : | |
359 | extension = 0; | |
360 | displacement = & opcode[1]; | |
361 | break; | |
362 | case 2 : | |
363 | opcode[0] |= 0x80; | |
364 | extension = 2; | |
365 | displacement = & opcode[1]; | |
366 | break; | |
367 | case 3 : | |
368 | opcode[2] = opcode[0] | 0x80; | |
369 | md_number_to_chars (opcode, PAR_NOP_INSN, 2); | |
370 | opcode_address += 2; | |
371 | extension = 4; | |
372 | displacement = & opcode[3]; | |
373 | break; | |
374 | default : | |
375 | abort (); | |
376 | } | |
377 | ||
378 | if (S_GET_SEGMENT (fragP->fr_symbol) != sec) | |
379 | { | |
380 | /* symbol must be resolved by linker */ | |
381 | if (fragP->fr_offset & 3) | |
382 | as_warn (_("Addend to unresolved symbol not on word boundary.")); | |
383 | addend = fragP->fr_offset >> 2; | |
384 | } | |
385 | else | |
386 | { | |
387 | /* Address we want to reach in file space. */ | |
388 | target_address = S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset; | |
252b5132 RH |
389 | addend = (target_address - (opcode_address & -4)) >> 2; |
390 | } | |
391 | ||
392 | /* Create a relocation for symbols that must be resolved by the linker. | |
393 | Otherwise output the completed insn. */ | |
394 | ||
395 | if (S_GET_SEGMENT (fragP->fr_symbol) != sec) | |
396 | { | |
397 | assert (fragP->fr_subtype != 1); | |
398 | assert (fragP->fr_cgen.insn != 0); | |
399 | gas_cgen_record_fixup (fragP, | |
400 | /* Offset of branch insn in frag. */ | |
401 | fragP->fr_fix + extension - 4, | |
402 | fragP->fr_cgen.insn, | |
403 | 4 /*length*/, | |
404 | /* FIXME: quick hack */ | |
405 | #if 0 | |
406 | CGEN_OPERAND_ENTRY (fragP->fr_cgen.opindex), | |
407 | #else | |
408 | CGEN_OPERAND_ENTRY (FR30_OPERAND_DISP24), | |
409 | #endif | |
410 | fragP->fr_cgen.opinfo, | |
411 | fragP->fr_symbol, fragP->fr_offset); | |
412 | } | |
413 | ||
414 | #define SIZE_FROM_RELAX_STATE(n) ((n) == 1 ? 1 : 3) | |
415 | ||
416 | md_number_to_chars (displacement, (valueT) addend, | |
417 | SIZE_FROM_RELAX_STATE (fragP->fr_subtype)); | |
418 | ||
419 | fragP->fr_fix += extension; | |
420 | #endif | |
421 | } | |
422 | \f | |
423 | /* Functions concerning relocs. */ | |
424 | ||
425 | /* The location from which a PC relative jump should be calculated, | |
426 | given a PC relative reloc. */ | |
427 | ||
428 | long | |
429 | md_pcrel_from_section (fixP, sec) | |
430 | fixS * fixP; | |
431 | segT sec; | |
432 | { | |
433 | if (fixP->fx_addsy != (symbolS *) NULL | |
434 | && (! S_IS_DEFINED (fixP->fx_addsy) | |
435 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) | |
436 | { | |
437 | /* The symbol is undefined (or is defined but not in this section). | |
438 | Let the linker figure it out. */ | |
439 | return 0; | |
440 | } | |
441 | ||
442 | return (fixP->fx_frag->fr_address + fixP->fx_where) & ~1; | |
443 | } | |
444 | ||
445 | /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP. | |
446 | Returns BFD_RELOC_NONE if no reloc type can be found. | |
447 | *FIXP may be modified if desired. */ | |
448 | ||
449 | bfd_reloc_code_real_type | |
450 | md_cgen_lookup_reloc (insn, operand, fixP) | |
33b5881a AM |
451 | const CGEN_INSN *insn ATTRIBUTE_UNUSED; |
452 | const CGEN_OPERAND *operand; | |
453 | fixS *fixP; | |
252b5132 RH |
454 | { |
455 | switch (operand->type) | |
456 | { | |
457 | case FR30_OPERAND_LABEL9: fixP->fx_pcrel = 1; return BFD_RELOC_FR30_9_PCREL; | |
458 | case FR30_OPERAND_LABEL12: fixP->fx_pcrel = 1; return BFD_RELOC_FR30_12_PCREL; | |
459 | case FR30_OPERAND_DISP10: return BFD_RELOC_FR30_10_IN_8; | |
460 | case FR30_OPERAND_DISP9: return BFD_RELOC_FR30_9_IN_8; | |
461 | case FR30_OPERAND_DISP8: return BFD_RELOC_FR30_8_IN_8; | |
462 | case FR30_OPERAND_UDISP6: return BFD_RELOC_FR30_6_IN_4; | |
463 | case FR30_OPERAND_I8: return BFD_RELOC_8; | |
464 | case FR30_OPERAND_I32: return BFD_RELOC_FR30_48; | |
465 | case FR30_OPERAND_I20: return BFD_RELOC_FR30_20; | |
466 | default : /* avoid -Wall warning */ | |
467 | break; | |
468 | } | |
469 | ||
470 | return BFD_RELOC_NONE; | |
471 | } | |
472 | ||
473 | /* See whether we need to force a relocation into the output file. | |
474 | This is used to force out switch and PC relative relocations when | |
475 | relaxing. */ | |
476 | ||
477 | int | |
478 | fr30_force_relocation (fix) | |
479 | fixS * fix; | |
480 | { | |
a161fe53 | 481 | if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
252b5132 RH |
482 | || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
483 | return 1; | |
484 | ||
a161fe53 | 485 | return S_FORCE_RELOC (fix->fx_addsy); |
252b5132 RH |
486 | } |
487 | \f | |
488 | /* Write a value out to the object file, using the appropriate endianness. */ | |
489 | ||
490 | void | |
491 | md_number_to_chars (buf, val, n) | |
492 | char * buf; | |
493 | valueT val; | |
494 | int n; | |
495 | { | |
496 | number_to_chars_bigendian (buf, val, n); | |
497 | } | |
498 | ||
499 | /* Turn a string in input_line_pointer into a floating point constant of type | |
500 | type, and store the appropriate bytes in *litP. The number of LITTLENUMS | |
501 | emitted is stored in *sizeP . An error message is returned, or NULL on OK. | |
502 | */ | |
503 | ||
504 | /* Equal to MAX_PRECISION in atof-ieee.c */ | |
505 | #define MAX_LITTLENUMS 6 | |
506 | ||
507 | char * | |
508 | md_atof (type, litP, sizeP) | |
509 | char type; | |
510 | char * litP; | |
511 | int * sizeP; | |
512 | { | |
513 | int i; | |
514 | int prec; | |
515 | LITTLENUM_TYPE words [MAX_LITTLENUMS]; | |
516 | char * t; | |
252b5132 RH |
517 | |
518 | switch (type) | |
519 | { | |
520 | case 'f': | |
521 | case 'F': | |
522 | case 's': | |
523 | case 'S': | |
524 | prec = 2; | |
525 | break; | |
526 | ||
527 | case 'd': | |
528 | case 'D': | |
529 | case 'r': | |
530 | case 'R': | |
531 | prec = 4; | |
532 | break; | |
533 | ||
534 | /* FIXME: Some targets allow other format chars for bigger sizes here. */ | |
535 | ||
536 | default: | |
537 | * sizeP = 0; | |
538 | return _("Bad call to md_atof()"); | |
539 | } | |
540 | ||
541 | t = atof_ieee (input_line_pointer, type, words); | |
542 | if (t) | |
543 | input_line_pointer = t; | |
544 | * sizeP = prec * sizeof (LITTLENUM_TYPE); | |
545 | ||
546 | for (i = 0; i < prec; i++) | |
547 | { | |
548 | md_number_to_chars (litP, (valueT) words[i], | |
549 | sizeof (LITTLENUM_TYPE)); | |
550 | litP += sizeof (LITTLENUM_TYPE); | |
551 | } | |
81d4177b | 552 | |
252b5132 RH |
553 | return 0; |
554 | } | |
555 | ||
556 | /* Worker function for fr30_is_colon_insn(). */ | |
33b5881a AM |
557 | static char restore_colon PARAMS ((int)); |
558 | ||
252b5132 RH |
559 | static char |
560 | restore_colon (advance_i_l_p_by) | |
561 | int advance_i_l_p_by; | |
562 | { | |
563 | char c; | |
81d4177b | 564 | |
252b5132 RH |
565 | /* Restore the colon, and advance input_line_pointer to |
566 | the end of the new symbol. */ | |
567 | * input_line_pointer = ':'; | |
568 | input_line_pointer += advance_i_l_p_by; | |
569 | c = * input_line_pointer; | |
570 | * input_line_pointer = 0; | |
81d4177b | 571 | |
252b5132 RH |
572 | return c; |
573 | } | |
574 | ||
575 | /* Determines if the symbol starting at START and ending in | |
576 | a colon that was at the location pointed to by INPUT_LINE_POINTER | |
577 | (but which has now been replaced bu a NUL) is in fact an | |
578 | LDI:8, LDI:20, LDI:32, CALL:D. JMP:D, RET:D or Bcc:D instruction. | |
579 | If it is, then it restores the colon, advances INPUT_LINE_POINTER | |
580 | to the real end of the instruction/symbol, and returns the character | |
581 | that really terminated the symbol. Otherwise it returns 0. */ | |
582 | char | |
583 | fr30_is_colon_insn (start) | |
584 | char * start; | |
585 | { | |
586 | char * i_l_p = input_line_pointer; | |
587 | ||
588 | /* Check to see if the symbol parsed so far is 'ldi' */ | |
589 | if ( (start[0] != 'l' && start[0] != 'L') | |
590 | || (start[1] != 'd' && start[1] != 'D') | |
591 | || (start[2] != 'i' && start[2] != 'I') | |
592 | || start[3] != 0) | |
593 | { | |
594 | /* Nope - check to see a 'd' follows the colon. */ | |
595 | if ( (i_l_p[1] == 'd' || i_l_p[1] == 'D') | |
596 | && (i_l_p[2] == ' ' || i_l_p[2] == '\t' || i_l_p[2] == '\n')) | |
597 | { | |
598 | /* Yup - it might be delay slot instruction. */ | |
599 | int i; | |
600 | static char * delay_insns [] = | |
601 | { | |
602 | "call", "jmp", "ret", "bra", "bno", | |
603 | "beq", "bne", "bc", "bnc", "bn", | |
604 | "bp", "bv", "bnv", "blt", "bge", | |
605 | "ble", "bgt", "bls", "bhi" | |
606 | }; | |
607 | ||
608 | for (i = sizeof (delay_insns) / sizeof (delay_insns[0]); i--;) | |
609 | { | |
610 | char * insn = delay_insns[i]; | |
611 | int len = strlen (insn); | |
612 | ||
613 | if (start [len] != 0) | |
614 | continue; | |
81d4177b | 615 | |
252b5132 | 616 | while (len --) |
3882b010 | 617 | if (TOLOWER (start [len]) != insn [len]) |
252b5132 | 618 | break; |
81d4177b | 619 | |
252b5132 RH |
620 | if (len == -1) |
621 | return restore_colon (1); | |
622 | } | |
623 | } | |
624 | ||
625 | /* Nope - it is a normal label. */ | |
626 | return 0; | |
627 | } | |
628 | ||
629 | /* Check to see if the text following the colon is '8' */ | |
630 | if (i_l_p[1] == '8' && (i_l_p[2] == ' ' || i_l_p[2] == '\t')) | |
631 | return restore_colon (2); | |
632 | ||
633 | /* Check to see if the text following the colon is '20' */ | |
634 | else if (i_l_p[1] == '2' && i_l_p[2] =='0' && (i_l_p[3] == ' ' || i_l_p[3] == '\t')) | |
635 | return restore_colon (3); | |
636 | ||
637 | /* Check to see if the text following the colon is '32' */ | |
638 | else if (i_l_p[1] == '3' && i_l_p[2] =='2' && (i_l_p[3] == ' ' || i_l_p[3] == '\t')) | |
639 | return restore_colon (3); | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
b34976b6 | 644 | bfd_boolean |
252b5132 RH |
645 | fr30_fix_adjustable (fixP) |
646 | fixS * fixP; | |
647 | { | |
252b5132 | 648 | /* We need the symbol name for the VTABLE entries */ |
a161fe53 | 649 | if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
252b5132 RH |
650 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
651 | return 0; | |
652 | ||
653 | return 1; | |
654 | } |