Commit | Line | Data |
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93fbbb04 | 1 | /* tc-xstormy16.c -- Assembler for the Sanyo XSTORMY16. |
ae6063d4 | 2 | Copyright 2000, 2001, 2002, 2003 Free Software Foundation. |
93fbbb04 GK |
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> | |
22 | #include "as.h" | |
5d6255fe | 23 | #include "subsegs.h" |
93fbbb04 GK |
24 | #include "symcat.h" |
25 | #include "opcodes/xstormy16-desc.h" | |
26 | #include "opcodes/xstormy16-opc.h" | |
27 | #include "cgen.h" | |
28 | ||
29 | /* Structure to hold all of the different components describing | |
30 | an individual instruction. */ | |
31 | typedef struct | |
32 | { | |
33 | const CGEN_INSN * insn; | |
34 | const CGEN_INSN * orig_insn; | |
35 | CGEN_FIELDS fields; | |
36 | #if CGEN_INT_INSN_P | |
37 | CGEN_INSN_INT buffer [1]; | |
38 | #define INSN_VALUE(buf) (*(buf)) | |
39 | #else | |
40 | unsigned char buffer [CGEN_MAX_INSN_SIZE]; | |
41 | #define INSN_VALUE(buf) (buf) | |
42 | #endif | |
43 | char * addr; | |
44 | fragS * frag; | |
45 | int num_fixups; | |
46 | fixS * fixups [GAS_CGEN_MAX_FIXUPS]; | |
47 | int indices [MAX_OPERAND_INSTANCES]; | |
48 | } | |
49 | xstormy16_insn; | |
50 | ||
51 | const char comment_chars[] = ";"; | |
52 | const char line_comment_chars[] = "#"; | |
53 | const char line_separator_chars[] = "|"; | |
54 | const char EXP_CHARS[] = "eE"; | |
55 | const char FLT_CHARS[] = "dD"; | |
56 | ||
57 | #define O_fptr_symbol (O_max + 1) | |
58 | \f | |
59 | #define XSTORMY16_SHORTOPTS "" | |
60 | const char * md_shortopts = XSTORMY16_SHORTOPTS; | |
61 | ||
62 | struct option md_longopts[] = | |
63 | { | |
64 | {NULL, no_argument, NULL, 0} | |
65 | }; | |
66 | size_t md_longopts_size = sizeof (md_longopts); | |
67 | ||
68 | int | |
69 | md_parse_option (c, arg) | |
70 | int c ATTRIBUTE_UNUSED; | |
71 | char * arg ATTRIBUTE_UNUSED; | |
72 | { | |
73 | return 0; | |
74 | } | |
75 | ||
76 | void | |
77 | md_show_usage (stream) | |
78 | FILE * stream; | |
79 | { | |
80 | fprintf (stream, _(" XSTORMY16 specific command line options:\n")); | |
5d6255fe | 81 | } |
93fbbb04 GK |
82 | |
83 | /* The target specific pseudo-ops which we support. */ | |
84 | const pseudo_typeS md_pseudo_table[] = | |
85 | { | |
86 | { "word", cons, 4 }, | |
87 | { NULL, NULL, 0 } | |
88 | }; | |
89 | ||
90 | \f | |
91 | void | |
92 | md_begin () | |
93 | { | |
94 | /* Initialize the `cgen' interface. */ | |
5d6255fe | 95 | |
93fbbb04 GK |
96 | /* Set the machine number and endian. */ |
97 | gas_cgen_cpu_desc = xstormy16_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0, | |
98 | CGEN_CPU_OPEN_ENDIAN, | |
99 | CGEN_ENDIAN_LITTLE, | |
100 | CGEN_CPU_OPEN_END); | |
101 | xstormy16_cgen_init_asm (gas_cgen_cpu_desc); | |
102 | ||
103 | /* This is a callback from cgen to gas to parse operands. */ | |
104 | cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand); | |
105 | } | |
106 | ||
e66c629e NC |
107 | static bfd_boolean skipping_fptr = FALSE; |
108 | ||
93fbbb04 GK |
109 | void |
110 | md_assemble (str) | |
111 | char * str; | |
112 | { | |
113 | xstormy16_insn insn; | |
114 | char * errmsg; | |
115 | ||
e66c629e NC |
116 | /* Make sure that if we had an erroneous input line which triggered |
117 | the skipping_fptr boolean that it does not affect following lines. */ | |
118 | skipping_fptr = FALSE; | |
119 | ||
93fbbb04 GK |
120 | /* Initialize GAS's cgen interface for a new instruction. */ |
121 | gas_cgen_init_parse (); | |
122 | ||
123 | insn.insn = xstormy16_cgen_assemble_insn | |
124 | (gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg); | |
5d6255fe | 125 | |
93fbbb04 GK |
126 | if (!insn.insn) |
127 | { | |
128 | as_bad (errmsg); | |
129 | return; | |
130 | } | |
131 | ||
132 | /* Doesn't really matter what we pass for RELAX_P here. */ | |
133 | gas_cgen_finish_insn (insn.insn, insn.buffer, | |
134 | CGEN_FIELDS_BITSIZE (& insn.fields), 0, NULL); | |
135 | } | |
136 | ||
5d6255fe | 137 | void |
93fbbb04 GK |
138 | md_operand (e) |
139 | expressionS * e; | |
140 | { | |
141 | if (*input_line_pointer != '@') | |
142 | return; | |
143 | ||
f53e95c7 | 144 | if (strncmp (input_line_pointer + 1, "fptr", 4) == 0) |
93fbbb04 GK |
145 | { |
146 | input_line_pointer += 5; | |
147 | SKIP_WHITESPACE (); | |
148 | if (*input_line_pointer != '(') | |
149 | { | |
150 | as_bad ("Expected '('"); | |
151 | goto err; | |
152 | } | |
153 | input_line_pointer++; | |
154 | ||
155 | expression (e); | |
156 | ||
157 | if (*input_line_pointer != ')') | |
158 | { | |
159 | as_bad ("Missing ')'"); | |
160 | goto err; | |
161 | } | |
162 | input_line_pointer++; | |
e66c629e | 163 | SKIP_WHITESPACE (); |
93fbbb04 GK |
164 | |
165 | if (e->X_op != O_symbol) | |
166 | as_bad ("Not a symbolic expression"); | |
e66c629e NC |
167 | else if (* input_line_pointer == '-') |
168 | /* We are computing the difference of two function pointers | |
169 | like this: | |
170 | ||
171 | .hword @fptr (foo) - @fptr (bar) | |
172 | ||
173 | In this situation we do not want to generate O_fptr_symbol | |
174 | operands because the result is an absolute value, not a | |
175 | function pointer. | |
176 | ||
177 | We need to make the check here, rather than when the fixup | |
178 | is generated as the function names (foo & bar in the above | |
179 | example) might be local symbols and we want the expression | |
180 | to be evaluated now. This kind of thing can happen when | |
181 | gcc is generating computed gotos. */ | |
182 | skipping_fptr = TRUE; | |
183 | else if (skipping_fptr) | |
184 | skipping_fptr = FALSE; | |
93fbbb04 GK |
185 | else |
186 | e->X_op = O_fptr_symbol; | |
187 | } | |
188 | ||
189 | return; | |
190 | err: | |
191 | ignore_rest_of_line (); | |
192 | } | |
193 | ||
194 | /* Called while parsing data to create a fixup. | |
195 | Create BFD_RELOC_XSTORMY16_FPTR16 relocations. */ | |
196 | ||
197 | void | |
198 | xstormy16_cons_fix_new (f, where, nbytes, exp) | |
199 | fragS *f; | |
200 | int where; | |
201 | int nbytes; | |
202 | expressionS *exp; | |
203 | { | |
204 | bfd_reloc_code_real_type code; | |
205 | fixS *fix; | |
206 | ||
207 | if (exp->X_op == O_fptr_symbol) | |
208 | { | |
209 | if (nbytes != 2) | |
210 | { | |
211 | as_bad ("unsupported fptr fixup size %d", nbytes); | |
212 | return; | |
213 | } | |
214 | exp->X_op = O_symbol; | |
215 | code = BFD_RELOC_XSTORMY16_FPTR16; | |
216 | } | |
217 | else if (nbytes == 1) | |
218 | code = BFD_RELOC_8; | |
219 | else if (nbytes == 2) | |
220 | code = BFD_RELOC_16; | |
221 | else if (nbytes == 4) | |
222 | code = BFD_RELOC_32; | |
223 | else | |
224 | { | |
225 | as_bad ("unsupported fixup size %d", nbytes); | |
226 | return; | |
227 | } | |
228 | ||
229 | fix = fix_new_exp (f, where, nbytes, exp, 0, code); | |
230 | } | |
231 | ||
5d6255fe | 232 | /* Called while parsing an instruction to create a fixup. |
93fbbb04 GK |
233 | Create BFD_RELOC_XSTORMY16_FPTR16 relocations. */ |
234 | ||
235 | fixS * | |
236 | xstormy16_cgen_record_fixup_exp (frag, where, insn, length, operand, opinfo, exp) | |
237 | fragS * frag; | |
238 | int where; | |
239 | const CGEN_INSN * insn; | |
240 | int length; | |
241 | const CGEN_OPERAND * operand; | |
242 | int opinfo; | |
243 | expressionS * exp; | |
244 | { | |
245 | fixS *fixP; | |
246 | operatorT op = exp->X_op; | |
5d6255fe | 247 | |
93fbbb04 GK |
248 | if (op == O_fptr_symbol) |
249 | exp->X_op = O_symbol; | |
250 | ||
251 | fixP = gas_cgen_record_fixup_exp (frag, where, insn, length, | |
252 | operand, opinfo, exp); | |
253 | ||
254 | if (op == O_fptr_symbol) | |
255 | { | |
256 | if (operand->type != XSTORMY16_OPERAND_IMM16) | |
257 | as_bad ("unsupported fptr fixup"); | |
258 | else | |
259 | { | |
260 | fixP->fx_r_type = BFD_RELOC_XSTORMY16_FPTR16; | |
261 | fixP->fx_where += 2; | |
262 | } | |
263 | } | |
264 | ||
265 | return fixP; | |
266 | } | |
267 | ||
268 | valueT | |
269 | md_section_align (segment, size) | |
270 | segT segment; | |
271 | valueT size; | |
272 | { | |
273 | int align = bfd_get_section_alignment (stdoutput, segment); | |
274 | return ((size + (1 << align) - 1) & (-1 << align)); | |
275 | } | |
276 | ||
277 | symbolS * | |
278 | md_undefined_symbol (name) | |
279 | char * name ATTRIBUTE_UNUSED; | |
280 | { | |
281 | return 0; | |
282 | } | |
283 | \f | |
284 | /* Return an initial guess of the length by which a fragment must grow to | |
285 | hold a branch to reach its destination. | |
286 | Also updates fr_type/fr_subtype as necessary. | |
287 | ||
288 | Called just before doing relaxation. | |
289 | Any symbol that is now undefined will not become defined. | |
290 | The guess for fr_var is ACTUALLY the growth beyond fr_fix. | |
291 | Whatever we do to grow fr_fix or fr_var contributes to our returned value. | |
292 | Although it may not be explicit in the frag, pretend fr_var starts with a | |
293 | 0 value. */ | |
294 | ||
295 | int | |
296 | md_estimate_size_before_relax (fragP, segment) | |
297 | fragS * fragP ATTRIBUTE_UNUSED; | |
298 | segT segment ATTRIBUTE_UNUSED; | |
299 | { | |
300 | /* No assembler relaxation is defined (or necessary) for this port. */ | |
301 | abort (); | |
5d6255fe | 302 | } |
93fbbb04 GK |
303 | |
304 | /* *fragP has been relaxed to its final size, and now needs to have | |
305 | the bytes inside it modified to conform to the new size. | |
306 | ||
307 | Called after relaxation is finished. | |
308 | fragP->fr_type == rs_machine_dependent. | |
309 | fragP->fr_subtype is the subtype of what the address relaxed to. */ | |
310 | ||
311 | void | |
312 | md_convert_frag (abfd, sec, fragP) | |
313 | bfd * abfd ATTRIBUTE_UNUSED; | |
314 | segT sec ATTRIBUTE_UNUSED; | |
315 | fragS * fragP ATTRIBUTE_UNUSED; | |
316 | { | |
317 | /* No assembler relaxation is defined (or necessary) for this port. */ | |
318 | abort (); | |
319 | } | |
320 | \f | |
321 | /* Functions concerning relocs. */ | |
322 | ||
323 | /* The location from which a PC relative jump should be calculated, | |
324 | given a PC relative reloc. */ | |
325 | ||
326 | long | |
327 | md_pcrel_from_section (fixP, sec) | |
328 | fixS * fixP; | |
329 | segT sec; | |
330 | { | |
331 | if (fixP->fx_addsy != (symbolS *) NULL | |
332 | && (! S_IS_DEFINED (fixP->fx_addsy) | |
ceb41009 NC |
333 | || S_GET_SEGMENT (fixP->fx_addsy) != sec) |
334 | || xstormy16_force_relocation (fixP)) | |
335 | /* The symbol is undefined, | |
336 | or it is defined but not in this section, | |
337 | or the relocation will be relative to this symbol not the section symbol. | |
338 | Let the linker figure it out. */ | |
339 | return 0; | |
93fbbb04 GK |
340 | |
341 | return fixP->fx_frag->fr_address + fixP->fx_where; | |
342 | } | |
343 | ||
344 | /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP. | |
345 | Returns BFD_RELOC_NONE if no reloc type can be found. | |
346 | *FIXP may be modified if desired. */ | |
347 | ||
348 | bfd_reloc_code_real_type | |
349 | md_cgen_lookup_reloc (insn, operand, fixP) | |
350 | const CGEN_INSN * insn ATTRIBUTE_UNUSED; | |
351 | const CGEN_OPERAND * operand; | |
352 | fixS * fixP; | |
353 | { | |
354 | switch (operand->type) | |
355 | { | |
356 | case XSTORMY16_OPERAND_IMM2: | |
357 | case XSTORMY16_OPERAND_IMM3: | |
358 | case XSTORMY16_OPERAND_IMM3B: | |
359 | case XSTORMY16_OPERAND_IMM4: | |
93fbbb04 GK |
360 | case XSTORMY16_OPERAND_HMEM8: |
361 | return BFD_RELOC_NONE; | |
5d6255fe | 362 | |
8f46beda DD |
363 | case XSTORMY16_OPERAND_IMM12: |
364 | fixP->fx_where += 2; | |
365 | return BFD_RELOC_XSTORMY16_12; | |
366 | ||
93fbbb04 GK |
367 | case XSTORMY16_OPERAND_IMM8: |
368 | case XSTORMY16_OPERAND_LMEM8: | |
369 | return fixP->fx_pcrel ? BFD_RELOC_8_PCREL : BFD_RELOC_8; | |
5d6255fe | 370 | |
93fbbb04 | 371 | case XSTORMY16_OPERAND_IMM16: |
9bb76eb8 | 372 | /* This might have been processed at parse time. */ |
93fbbb04 | 373 | fixP->fx_where += 2; |
9bb76eb8 DD |
374 | if (fixP->fx_cgen.opinfo && fixP->fx_cgen.opinfo != BFD_RELOC_NONE) |
375 | return fixP->fx_cgen.opinfo; | |
93fbbb04 GK |
376 | return fixP->fx_pcrel ? BFD_RELOC_16_PCREL : BFD_RELOC_16; |
377 | ||
378 | case XSTORMY16_OPERAND_ABS24: | |
379 | return BFD_RELOC_XSTORMY16_24; | |
380 | ||
93fbbb04 | 381 | case XSTORMY16_OPERAND_REL8_4: |
2d10acd2 DD |
382 | fixP->fx_addnumber -= 2; |
383 | case XSTORMY16_OPERAND_REL8_2: | |
384 | fixP->fx_addnumber -= 2; | |
93fbbb04 GK |
385 | fixP->fx_pcrel = 1; |
386 | return BFD_RELOC_8_PCREL; | |
387 | ||
388 | case XSTORMY16_OPERAND_REL12: | |
389 | fixP->fx_where += 2; | |
5d6255fe | 390 | /* Fall through... */ |
93fbbb04 | 391 | case XSTORMY16_OPERAND_REL12A: |
2d10acd2 | 392 | fixP->fx_addnumber -= 2; |
93fbbb04 GK |
393 | fixP->fx_pcrel = 1; |
394 | return BFD_RELOC_XSTORMY16_REL_12; | |
395 | ||
396 | default : /* avoid -Wall warning */ | |
397 | abort (); | |
398 | } | |
399 | } | |
400 | ||
401 | /* See whether we need to force a relocation into the output file. | |
402 | This is used to force out switch and PC relative relocations when | |
403 | relaxing. */ | |
404 | ||
405 | int | |
406 | xstormy16_force_relocation (fix) | |
407 | fixS * fix; | |
408 | { | |
ae6063d4 AM |
409 | if (fix->fx_r_type == BFD_RELOC_XSTORMY16_FPTR16) |
410 | return 1; | |
a161fe53 | 411 | |
ae6063d4 | 412 | return generic_force_reloc (fix); |
93fbbb04 GK |
413 | } |
414 | ||
415 | /* Return true if a relocation against a symbol may be replaced with | |
416 | a relocation against section+offset. */ | |
417 | ||
b34976b6 | 418 | bfd_boolean |
93fbbb04 GK |
419 | xstormy16_fix_adjustable (fixP) |
420 | fixS * fixP; | |
421 | { | |
1f7fd478 | 422 | /* We need the symbol name for the VTABLE entries. */ |
a161fe53 | 423 | if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
1f7fd478 NC |
424 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
425 | return 0; | |
426 | ||
a161fe53 AM |
427 | if (fixP->fx_r_type == BFD_RELOC_XSTORMY16_FPTR16) |
428 | return 0; | |
429 | ||
430 | return 1; | |
93fbbb04 GK |
431 | } |
432 | ||
433 | /* This is a copy of gas_cgen_md_apply_fix3, with some enhancements to | |
434 | do various things that would not be valid for all ports. */ | |
435 | ||
436 | void | |
437 | xstormy16_md_apply_fix3 (fixP, valueP, seg) | |
438 | fixS * fixP; | |
439 | valueT * valueP; | |
440 | segT seg ATTRIBUTE_UNUSED; | |
441 | { | |
442 | char *where = fixP->fx_frag->fr_literal + fixP->fx_where; | |
a161fe53 | 443 | valueT value = *valueP; |
93fbbb04 GK |
444 | /* Canonical name, since used a lot. */ |
445 | CGEN_CPU_DESC cd = gas_cgen_cpu_desc; | |
446 | ||
2d10acd2 DD |
447 | /* md_cgen_lookup_reloc() will adjust this to compensate for where |
448 | in the opcode the relocation happens, for pcrel relocations. We | |
449 | have no other way of keeping track of what this offset needs to | |
450 | be. */ | |
451 | fixP->fx_addnumber = 0; | |
452 | ||
93fbbb04 GK |
453 | /* This port has pc-relative relocs and DIFF_EXPR_OK defined, so |
454 | it must deal with turning a BFD_RELOC_{8,16,32,64} into a | |
455 | BFD_RELOC_*_PCREL for the case of | |
456 | ||
457 | .word something-. | |
458 | */ | |
459 | if (fixP->fx_pcrel) | |
460 | switch (fixP->fx_r_type) | |
461 | { | |
462 | case BFD_RELOC_8: | |
463 | fixP->fx_r_type = BFD_RELOC_8_PCREL; | |
464 | break; | |
465 | case BFD_RELOC_16: | |
466 | fixP->fx_r_type = BFD_RELOC_16_PCREL; | |
467 | break; | |
468 | case BFD_RELOC_32: | |
469 | fixP->fx_r_type = BFD_RELOC_32_PCREL; | |
470 | break; | |
471 | case BFD_RELOC_64: | |
472 | fixP->fx_r_type = BFD_RELOC_64_PCREL; | |
473 | break; | |
474 | default: | |
475 | break; | |
476 | } | |
5d6255fe | 477 | |
93fbbb04 | 478 | if (fixP->fx_addsy == (symbolS *) NULL) |
a161fe53 AM |
479 | fixP->fx_done = 1; |
480 | ||
481 | /* We don't actually support subtracting a symbol. */ | |
482 | if (fixP->fx_subsy != (symbolS *) NULL) | |
483 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
93fbbb04 GK |
484 | |
485 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) | |
486 | { | |
487 | int opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; | |
488 | const CGEN_OPERAND *operand = cgen_operand_lookup_by_num (cd, opindex); | |
489 | const char *errmsg; | |
490 | bfd_reloc_code_real_type reloc_type; | |
491 | CGEN_FIELDS *fields = alloca (CGEN_CPU_SIZEOF_FIELDS (cd)); | |
492 | const CGEN_INSN *insn = fixP->fx_cgen.insn; | |
493 | ||
494 | /* If the reloc has been fully resolved finish the operand here. */ | |
495 | /* FIXME: This duplicates the capabilities of code in BFD. */ | |
496 | if (fixP->fx_done) | |
497 | { | |
498 | CGEN_CPU_SET_FIELDS_BITSIZE (cd) (fields, CGEN_INSN_BITSIZE (insn)); | |
499 | CGEN_CPU_SET_VMA_OPERAND (cd) (cd, opindex, fields, (bfd_vma) value); | |
500 | ||
501 | #if CGEN_INT_INSN_P | |
502 | { | |
503 | CGEN_INSN_INT insn_value = | |
504 | cgen_get_insn_value (cd, where, CGEN_INSN_BITSIZE (insn)); | |
505 | ||
506 | /* ??? 0 is passed for `pc'. */ | |
507 | errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields, | |
508 | &insn_value, (bfd_vma) 0); | |
509 | cgen_put_insn_value (cd, where, CGEN_INSN_BITSIZE (insn), | |
510 | insn_value); | |
511 | } | |
512 | #else | |
513 | /* ??? 0 is passed for `pc'. */ | |
514 | errmsg = CGEN_CPU_INSERT_OPERAND (cd) (cd, opindex, fields, where, | |
515 | (bfd_vma) 0); | |
516 | #endif | |
517 | if (errmsg) | |
518 | as_bad_where (fixP->fx_file, fixP->fx_line, "%s", errmsg); | |
519 | } | |
520 | ||
521 | if (fixP->fx_done) | |
1f7fd478 | 522 | return; |
93fbbb04 GK |
523 | |
524 | /* The operand isn't fully resolved. Determine a BFD reloc value | |
525 | based on the operand information and leave it to | |
526 | bfd_install_relocation. Note that this doesn't work when | |
b34976b6 | 527 | !partial_inplace. */ |
93fbbb04 GK |
528 | |
529 | reloc_type = md_cgen_lookup_reloc (insn, operand, fixP); | |
530 | if (reloc_type != BFD_RELOC_NONE) | |
531 | { | |
532 | fixP->fx_r_type = reloc_type; | |
533 | } | |
534 | else | |
535 | { | |
536 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
537 | _("unresolved expression that must be resolved")); | |
538 | fixP->fx_done = 1; | |
1f7fd478 | 539 | return; |
93fbbb04 GK |
540 | } |
541 | } | |
542 | else if (fixP->fx_done) | |
543 | { | |
544 | /* We're finished with this fixup. Install it because | |
545 | bfd_install_relocation won't be called to do it. */ | |
546 | switch (fixP->fx_r_type) | |
547 | { | |
548 | case BFD_RELOC_8: | |
549 | md_number_to_chars (where, value, 1); | |
550 | break; | |
551 | case BFD_RELOC_16: | |
552 | md_number_to_chars (where, value, 2); | |
553 | break; | |
554 | case BFD_RELOC_32: | |
555 | md_number_to_chars (where, value, 4); | |
556 | break; | |
557 | case BFD_RELOC_64: | |
558 | md_number_to_chars (where, value, 8); | |
559 | break; | |
560 | default: | |
561 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
562 | _("internal error: can't install fix for reloc type %d (`%s')"), | |
563 | fixP->fx_r_type, bfd_get_reloc_code_name (fixP->fx_r_type)); | |
564 | break; | |
565 | } | |
566 | } | |
567 | else | |
568 | { | |
569 | /* bfd_install_relocation will be called to finish things up. */ | |
570 | } | |
571 | ||
572 | /* This is a RELA port. Thus, it does not need to store a | |
573 | value if it is going to make a reloc. What's more, when | |
574 | assembling a line like | |
5d6255fe | 575 | |
93fbbb04 | 576 | .byte global-0x7f00 |
5d6255fe | 577 | |
93fbbb04 GK |
578 | we'll get a spurious error message if we try to stuff 0x7f00 into |
579 | the byte. */ | |
580 | if (! fixP->fx_done) | |
581 | *valueP = 0; | |
582 | ||
583 | /* Tuck `value' away for use by tc_gen_reloc. | |
584 | See the comment describing fx_addnumber in write.h. | |
ceb41009 NC |
585 | This field is misnamed (or misused :-). */ |
586 | fixP->fx_addnumber += value; | |
93fbbb04 GK |
587 | } |
588 | ||
589 | \f | |
590 | /* Write a value out to the object file, using the appropriate endianness. */ | |
591 | ||
592 | void | |
593 | md_number_to_chars (buf, val, n) | |
594 | char * buf; | |
595 | valueT val; | |
596 | int n; | |
597 | { | |
598 | number_to_chars_littleendian (buf, val, n); | |
599 | } | |
600 | ||
601 | /* Turn a string in input_line_pointer into a floating point constant of type | |
602 | type, and store the appropriate bytes in *litP. The number of LITTLENUMS | |
603 | emitted is stored in *sizeP . An error message is returned, or NULL on OK. | |
604 | */ | |
605 | ||
606 | /* Equal to MAX_PRECISION in atof-ieee.c */ | |
607 | #define MAX_LITTLENUMS 6 | |
608 | ||
609 | char * | |
610 | md_atof (type, litP, sizeP) | |
611 | char type; | |
612 | char * litP; | |
613 | int * sizeP; | |
614 | { | |
615 | int prec; | |
616 | LITTLENUM_TYPE words [MAX_LITTLENUMS]; | |
617 | LITTLENUM_TYPE *wordP; | |
618 | char * t; | |
619 | ||
620 | switch (type) | |
621 | { | |
622 | case 'f': | |
623 | case 'F': | |
624 | prec = 2; | |
625 | break; | |
626 | ||
627 | case 'd': | |
628 | case 'D': | |
629 | prec = 4; | |
630 | break; | |
631 | ||
632 | /* FIXME: Some targets allow other format chars for bigger sizes here. */ | |
633 | ||
634 | default: | |
635 | * sizeP = 0; | |
636 | return _("Bad call to md_atof()"); | |
637 | } | |
638 | ||
639 | t = atof_ieee (input_line_pointer, type, words); | |
640 | if (t) | |
641 | input_line_pointer = t; | |
642 | * sizeP = prec * sizeof (LITTLENUM_TYPE); | |
643 | ||
644 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
645 | /* This loops outputs the LITTLENUMs in REVERSE order; in accord with | |
646 | the littleendianness of the processor. */ | |
647 | for (wordP = words + prec - 1; prec--;) | |
648 | { | |
649 | md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); | |
650 | litP += sizeof (LITTLENUM_TYPE); | |
651 | } | |
5d6255fe | 652 | |
93fbbb04 GK |
653 | return 0; |
654 | } |