Commit | Line | Data |
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99c513f6 | 1 | /* tc-rl78.c -- Assembler for the Renesas RL78 |
b90efa5b | 2 | Copyright (C) 2011-2015 Free Software Foundation, Inc. |
99c513f6 DD |
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 3, 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 | |
18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA | |
19 | 02110-1301, USA. */ | |
20 | ||
21 | #include "as.h" | |
22 | #include "struc-symbol.h" | |
99c513f6 DD |
23 | #include "safe-ctype.h" |
24 | #include "dwarf2dbg.h" | |
25 | #include "libbfd.h" | |
26 | #include "elf/common.h" | |
27 | #include "elf/rl78.h" | |
28 | #include "rl78-defs.h" | |
29 | #include "filenames.h" | |
30 | #include "listing.h" | |
31 | #include "sb.h" | |
32 | #include "macro.h" | |
33 | ||
34 | const char comment_chars[] = ";"; | |
35 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
36 | first line of the input file. This is because the compiler outputs | |
37 | #NO_APP at the beginning of its output. */ | |
38 | const char line_comment_chars[] = "#"; | |
cbf1fdc9 DD |
39 | /* Use something that isn't going to be needed by any expressions or |
40 | other syntax. */ | |
41 | const char line_separator_chars[] = "@"; | |
99c513f6 DD |
42 | |
43 | const char EXP_CHARS[] = "eE"; | |
44 | const char FLT_CHARS[] = "dD"; | |
45 | ||
4046d87a NC |
46 | /* ELF flags to set in the output file header. */ |
47 | static int elf_flags = 0; | |
48 | ||
99c513f6 DD |
49 | /*------------------------------------------------------------------*/ |
50 | ||
51 | char * rl78_lex_start; | |
52 | char * rl78_lex_end; | |
53 | ||
54 | typedef struct rl78_bytesT | |
55 | { | |
56 | char prefix[1]; | |
57 | int n_prefix; | |
58 | char base[4]; | |
59 | int n_base; | |
60 | char ops[8]; | |
61 | int n_ops; | |
62 | struct | |
63 | { | |
64 | expressionS exp; | |
65 | char offset; | |
66 | char nbits; | |
67 | char type; /* RL78REL_*. */ | |
68 | int reloc; | |
69 | fixS * fixP; | |
70 | } fixups[2]; | |
71 | int n_fixups; | |
72 | struct | |
73 | { | |
74 | char type; | |
75 | char field_pos; | |
76 | char val_ofs; | |
77 | } relax[2]; | |
78 | int n_relax; | |
79 | int link_relax; | |
80 | fixS *link_relax_fixP; | |
81 | char times_grown; | |
82 | char times_shrank; | |
83 | } rl78_bytesT; | |
84 | ||
85 | static rl78_bytesT rl78_bytes; | |
86 | ||
0c315784 DD |
87 | void |
88 | rl78_relax (int type, int pos) | |
89 | { | |
90 | rl78_bytes.relax[rl78_bytes.n_relax].type = type; | |
91 | rl78_bytes.relax[rl78_bytes.n_relax].field_pos = pos; | |
92 | rl78_bytes.relax[rl78_bytes.n_relax].val_ofs = rl78_bytes.n_base + rl78_bytes.n_ops; | |
93 | rl78_bytes.n_relax ++; | |
94 | } | |
95 | ||
9cea966c DD |
96 | void |
97 | rl78_linkrelax_addr16 (void) | |
98 | { | |
99 | rl78_bytes.link_relax |= RL78_RELAXA_ADDR16; | |
100 | } | |
101 | ||
102 | void | |
103 | rl78_linkrelax_branch (void) | |
104 | { | |
105 | rl78_bytes.link_relax |= RL78_RELAXA_BRA; | |
106 | } | |
107 | ||
99c513f6 DD |
108 | static void |
109 | rl78_fixup (expressionS exp, int offsetbits, int nbits, int type) | |
110 | { | |
111 | rl78_bytes.fixups[rl78_bytes.n_fixups].exp = exp; | |
112 | rl78_bytes.fixups[rl78_bytes.n_fixups].offset = offsetbits; | |
113 | rl78_bytes.fixups[rl78_bytes.n_fixups].nbits = nbits; | |
114 | rl78_bytes.fixups[rl78_bytes.n_fixups].type = type; | |
115 | rl78_bytes.fixups[rl78_bytes.n_fixups].reloc = exp.X_md; | |
116 | rl78_bytes.n_fixups ++; | |
117 | } | |
118 | ||
119 | #define rl78_field_fixup(exp, offset, nbits, type) \ | |
120 | rl78_fixup (exp, offset + 8 * rl78_bytes.n_prefix), nbits, type) | |
121 | ||
122 | #define rl78_op_fixup(exp, offset, nbits, type) \ | |
123 | rl78_fixup (exp, offset + 8 * (rl78_bytes.n_prefix + rl78_bytes.n_base), nbits, type) | |
124 | ||
125 | void | |
126 | rl78_prefix (int p) | |
127 | { | |
128 | rl78_bytes.prefix[0] = p; | |
129 | rl78_bytes.n_prefix = 1; | |
130 | } | |
131 | ||
132 | int | |
133 | rl78_has_prefix () | |
134 | { | |
135 | return rl78_bytes.n_prefix; | |
136 | } | |
137 | ||
138 | void | |
139 | rl78_base1 (int b1) | |
140 | { | |
141 | rl78_bytes.base[0] = b1; | |
142 | rl78_bytes.n_base = 1; | |
143 | } | |
144 | ||
145 | void | |
146 | rl78_base2 (int b1, int b2) | |
147 | { | |
148 | rl78_bytes.base[0] = b1; | |
149 | rl78_bytes.base[1] = b2; | |
150 | rl78_bytes.n_base = 2; | |
151 | } | |
152 | ||
153 | void | |
154 | rl78_base3 (int b1, int b2, int b3) | |
155 | { | |
156 | rl78_bytes.base[0] = b1; | |
157 | rl78_bytes.base[1] = b2; | |
158 | rl78_bytes.base[2] = b3; | |
159 | rl78_bytes.n_base = 3; | |
160 | } | |
161 | ||
162 | void | |
163 | rl78_base4 (int b1, int b2, int b3, int b4) | |
164 | { | |
165 | rl78_bytes.base[0] = b1; | |
166 | rl78_bytes.base[1] = b2; | |
167 | rl78_bytes.base[2] = b3; | |
168 | rl78_bytes.base[3] = b4; | |
169 | rl78_bytes.n_base = 4; | |
170 | } | |
171 | ||
172 | #define F_PRECISION 2 | |
173 | ||
174 | void | |
175 | rl78_op (expressionS exp, int nbytes, int type) | |
176 | { | |
177 | int v = 0; | |
178 | ||
179 | if ((exp.X_op == O_constant || exp.X_op == O_big) | |
180 | && type != RL78REL_PCREL) | |
181 | { | |
182 | if (exp.X_op == O_big && exp.X_add_number <= 0) | |
183 | { | |
184 | LITTLENUM_TYPE w[2]; | |
185 | char * ip = rl78_bytes.ops + rl78_bytes.n_ops; | |
186 | ||
187 | gen_to_words (w, F_PRECISION, 8); | |
188 | ip[3] = w[0] >> 8; | |
189 | ip[2] = w[0]; | |
190 | ip[1] = w[1] >> 8; | |
191 | ip[0] = w[1]; | |
192 | rl78_bytes.n_ops += 4; | |
193 | } | |
194 | else | |
195 | { | |
196 | v = exp.X_add_number; | |
197 | while (nbytes) | |
198 | { | |
199 | rl78_bytes.ops[rl78_bytes.n_ops++] =v & 0xff; | |
200 | v >>= 8; | |
201 | nbytes --; | |
202 | } | |
203 | } | |
204 | } | |
205 | else | |
206 | { | |
4107ae22 DD |
207 | if (nbytes > 2 |
208 | && exp.X_md == BFD_RELOC_RL78_CODE) | |
209 | exp.X_md = 0; | |
b3fe4307 NC |
210 | |
211 | if (nbytes == 1 | |
212 | && (exp.X_md == BFD_RELOC_RL78_LO16 | |
213 | || exp.X_md == BFD_RELOC_RL78_HI16)) | |
214 | as_bad (_("16-bit relocation used in 8-bit operand")); | |
215 | ||
216 | if (nbytes == 2 | |
217 | && exp.X_md == BFD_RELOC_RL78_HI8) | |
218 | as_bad (_("8-bit relocation used in 16-bit operand")); | |
219 | ||
99c513f6 DD |
220 | rl78_op_fixup (exp, rl78_bytes.n_ops * 8, nbytes * 8, type); |
221 | memset (rl78_bytes.ops + rl78_bytes.n_ops, 0, nbytes); | |
222 | rl78_bytes.n_ops += nbytes; | |
223 | } | |
224 | } | |
225 | ||
226 | /* This gets complicated when the field spans bytes, because fields | |
227 | are numbered from the MSB of the first byte as zero, and bits are | |
228 | stored LSB towards the LSB of the byte. Thus, a simple four-bit | |
229 | insertion of 12 at position 4 of 0x00 yields: 0x0b. A three-bit | |
230 | insertion of b'MXL at position 7 is like this: | |
231 | ||
232 | - - - - - - - - - - - - - - - - | |
233 | M X L */ | |
234 | ||
235 | void | |
236 | rl78_field (int val, int pos, int sz) | |
237 | { | |
238 | int valm; | |
239 | int bytep, bitp; | |
240 | ||
241 | if (sz > 0) | |
242 | { | |
243 | if (val < 0 || val >= (1 << sz)) | |
244 | as_bad (_("Value %d doesn't fit in unsigned %d-bit field"), val, sz); | |
245 | } | |
246 | else | |
247 | { | |
248 | sz = - sz; | |
249 | if (val < -(1 << (sz - 1)) || val >= (1 << (sz - 1))) | |
250 | as_bad (_("Value %d doesn't fit in signed %d-bit field"), val, sz); | |
251 | } | |
252 | ||
253 | /* This code points at 'M' in the above example. */ | |
254 | bytep = pos / 8; | |
255 | bitp = pos % 8; | |
256 | ||
257 | while (bitp + sz > 8) | |
258 | { | |
259 | int ssz = 8 - bitp; | |
260 | int svalm; | |
261 | ||
262 | svalm = val >> (sz - ssz); | |
263 | svalm = svalm & ((1 << ssz) - 1); | |
264 | svalm = svalm << (8 - bitp - ssz); | |
265 | gas_assert (bytep < rl78_bytes.n_base); | |
266 | rl78_bytes.base[bytep] |= svalm; | |
267 | ||
268 | bitp = 0; | |
269 | sz -= ssz; | |
270 | bytep ++; | |
271 | } | |
272 | valm = val & ((1 << sz) - 1); | |
273 | valm = valm << (8 - bitp - sz); | |
274 | gas_assert (bytep < rl78_bytes.n_base); | |
275 | rl78_bytes.base[bytep] |= valm; | |
276 | } | |
277 | ||
278 | /*------------------------------------------------------------------*/ | |
279 | ||
9cea966c DD |
280 | enum options |
281 | { | |
282 | OPTION_RELAX = OPTION_MD_BASE, | |
4046d87a | 283 | OPTION_G10, |
856ea05c KP |
284 | OPTION_32BIT_DOUBLES, |
285 | OPTION_64BIT_DOUBLES, | |
9cea966c DD |
286 | }; |
287 | ||
99c513f6 DD |
288 | #define RL78_SHORTOPTS "" |
289 | const char * md_shortopts = RL78_SHORTOPTS; | |
290 | ||
291 | /* Assembler options. */ | |
292 | struct option md_longopts[] = | |
293 | { | |
9cea966c | 294 | {"relax", no_argument, NULL, OPTION_RELAX}, |
4046d87a | 295 | {"mg10", no_argument, NULL, OPTION_G10}, |
856ea05c KP |
296 | {"m32bit-doubles", no_argument, NULL, OPTION_32BIT_DOUBLES}, |
297 | {"m64bit-doubles", no_argument, NULL, OPTION_64BIT_DOUBLES}, | |
99c513f6 DD |
298 | {NULL, no_argument, NULL, 0} |
299 | }; | |
300 | size_t md_longopts_size = sizeof (md_longopts); | |
301 | ||
302 | int | |
9cea966c | 303 | md_parse_option (int c, char * arg ATTRIBUTE_UNUSED) |
99c513f6 | 304 | { |
9cea966c DD |
305 | switch (c) |
306 | { | |
307 | case OPTION_RELAX: | |
308 | linkrelax = 1; | |
309 | return 1; | |
310 | ||
4046d87a NC |
311 | case OPTION_G10: |
312 | elf_flags |= E_FLAG_RL78_G10; | |
313 | return 1; | |
856ea05c KP |
314 | |
315 | case OPTION_32BIT_DOUBLES: | |
316 | elf_flags &= ~ E_FLAG_RL78_64BIT_DOUBLES; | |
317 | return 1; | |
318 | ||
319 | case OPTION_64BIT_DOUBLES: | |
320 | elf_flags |= E_FLAG_RL78_64BIT_DOUBLES; | |
321 | return 1; | |
9cea966c | 322 | } |
99c513f6 DD |
323 | return 0; |
324 | } | |
325 | ||
326 | void | |
327 | md_show_usage (FILE * stream ATTRIBUTE_UNUSED) | |
328 | { | |
856ea05c KP |
329 | fprintf (stream, _(" RL78 specific command line options:\n")); |
330 | fprintf (stream, _(" --mg10 Enable support for G10 variant\n")); | |
331 | fprintf (stream, _(" --m32bit-doubles [default]\n")); | |
332 | fprintf (stream, _(" --m64bit-doubles\n")); | |
99c513f6 DD |
333 | } |
334 | ||
99c513f6 DD |
335 | static void |
336 | s_bss (int ignore ATTRIBUTE_UNUSED) | |
337 | { | |
338 | int temp; | |
339 | ||
340 | temp = get_absolute_expression (); | |
341 | subseg_set (bss_section, (subsegT) temp); | |
342 | demand_empty_rest_of_line (); | |
343 | } | |
344 | ||
856ea05c KP |
345 | static void |
346 | rl78_float_cons (int ignore ATTRIBUTE_UNUSED) | |
347 | { | |
348 | if (elf_flags & E_FLAG_RL78_64BIT_DOUBLES) | |
349 | return float_cons ('d'); | |
350 | return float_cons ('f'); | |
351 | } | |
352 | ||
99c513f6 DD |
353 | /* The target specific pseudo-ops which we support. */ |
354 | const pseudo_typeS md_pseudo_table[] = | |
355 | { | |
856ea05c KP |
356 | /* Our "standard" pseudos. */ |
357 | { "double", rl78_float_cons, 'd' }, | |
358 | { "bss", s_bss, 0 }, | |
359 | { "3byte", cons, 3 }, | |
360 | { "int", cons, 4 }, | |
361 | { "word", cons, 4 }, | |
99c513f6 DD |
362 | |
363 | /* End of list marker. */ | |
364 | { NULL, NULL, 0 } | |
365 | }; | |
366 | ||
367 | void | |
368 | md_begin (void) | |
369 | { | |
370 | } | |
371 | ||
372 | void | |
373 | rl78_md_end (void) | |
374 | { | |
375 | } | |
376 | ||
4046d87a NC |
377 | /* Set the ELF specific flags. */ |
378 | void | |
379 | rl78_elf_final_processing (void) | |
380 | { | |
381 | elf_elfheader (stdoutput)->e_flags |= elf_flags; | |
382 | } | |
383 | ||
99c513f6 DD |
384 | /* Write a value out to the object file, using the appropriate endianness. */ |
385 | void | |
386 | md_number_to_chars (char * buf, valueT val, int n) | |
387 | { | |
388 | number_to_chars_littleendian (buf, val, n); | |
389 | } | |
390 | ||
c9d66558 DD |
391 | static void |
392 | require_end_of_expr (char *fname) | |
393 | { | |
394 | while (* input_line_pointer == ' ' | |
395 | || * input_line_pointer == '\t') | |
396 | input_line_pointer ++; | |
397 | ||
398 | if (! * input_line_pointer | |
399 | || strchr ("\n\r,", * input_line_pointer) | |
400 | || strchr (comment_chars, * input_line_pointer) | |
401 | || strchr (line_comment_chars, * input_line_pointer) | |
402 | || strchr (line_separator_chars, * input_line_pointer)) | |
403 | return; | |
404 | ||
405 | as_bad (_("%%%s() must be outermost term in expression"), fname); | |
406 | } | |
407 | ||
99c513f6 DD |
408 | static struct |
409 | { | |
410 | char * fname; | |
411 | int reloc; | |
412 | } | |
413 | reloc_functions[] = | |
414 | { | |
4107ae22 | 415 | { "code", BFD_RELOC_RL78_CODE }, |
99c513f6 DD |
416 | { "lo16", BFD_RELOC_RL78_LO16 }, |
417 | { "hi16", BFD_RELOC_RL78_HI16 }, | |
418 | { "hi8", BFD_RELOC_RL78_HI8 }, | |
419 | { 0, 0 } | |
420 | }; | |
421 | ||
422 | void | |
423 | md_operand (expressionS * exp ATTRIBUTE_UNUSED) | |
424 | { | |
425 | int reloc = 0; | |
426 | int i; | |
427 | ||
428 | for (i = 0; reloc_functions[i].fname; i++) | |
429 | { | |
430 | int flen = strlen (reloc_functions[i].fname); | |
431 | ||
432 | if (input_line_pointer[0] == '%' | |
433 | && strncasecmp (input_line_pointer + 1, reloc_functions[i].fname, flen) == 0 | |
434 | && input_line_pointer[flen + 1] == '(') | |
435 | { | |
436 | reloc = reloc_functions[i].reloc; | |
437 | input_line_pointer += flen + 2; | |
438 | break; | |
439 | } | |
440 | } | |
441 | if (reloc == 0) | |
442 | return; | |
443 | ||
444 | expression (exp); | |
445 | if (* input_line_pointer == ')') | |
446 | input_line_pointer ++; | |
447 | ||
448 | exp->X_md = reloc; | |
c9d66558 DD |
449 | |
450 | require_end_of_expr (reloc_functions[i].fname); | |
99c513f6 DD |
451 | } |
452 | ||
453 | void | |
454 | rl78_frag_init (fragS * fragP) | |
455 | { | |
9cea966c DD |
456 | if (rl78_bytes.n_relax || rl78_bytes.link_relax) |
457 | { | |
458 | fragP->tc_frag_data = malloc (sizeof (rl78_bytesT)); | |
459 | memcpy (fragP->tc_frag_data, & rl78_bytes, sizeof (rl78_bytesT)); | |
460 | } | |
461 | else | |
462 | fragP->tc_frag_data = 0; | |
463 | } | |
464 | ||
465 | /* When relaxing, we need to output a reloc for any .align directive | |
466 | so that we can retain this alignment as we adjust opcode sizes. */ | |
467 | void | |
468 | rl78_handle_align (fragS * frag) | |
469 | { | |
470 | if (linkrelax | |
471 | && (frag->fr_type == rs_align | |
472 | || frag->fr_type == rs_align_code) | |
473 | && frag->fr_address + frag->fr_fix > 0 | |
474 | && frag->fr_offset > 0 | |
475 | && now_seg != bss_section) | |
476 | { | |
477 | fix_new (frag, frag->fr_fix, 0, | |
478 | &abs_symbol, RL78_RELAXA_ALIGN + frag->fr_offset, | |
479 | 0, BFD_RELOC_RL78_RELAX); | |
480 | /* For the purposes of relaxation, this relocation is attached | |
481 | to the byte *after* the alignment - i.e. the byte that must | |
482 | remain aligned. */ | |
483 | fix_new (frag->fr_next, 0, 0, | |
484 | &abs_symbol, RL78_RELAXA_ELIGN + frag->fr_offset, | |
485 | 0, BFD_RELOC_RL78_RELAX); | |
486 | } | |
99c513f6 DD |
487 | } |
488 | ||
489 | char * | |
490 | md_atof (int type, char * litP, int * sizeP) | |
491 | { | |
492 | return ieee_md_atof (type, litP, sizeP, target_big_endian); | |
493 | } | |
494 | ||
495 | symbolS * | |
496 | md_undefined_symbol (char * name ATTRIBUTE_UNUSED) | |
497 | { | |
498 | return NULL; | |
499 | } | |
500 | ||
501 | #define APPEND(B, N_B) \ | |
502 | if (rl78_bytes.N_B) \ | |
503 | { \ | |
504 | memcpy (bytes + idx, rl78_bytes.B, rl78_bytes.N_B); \ | |
505 | idx += rl78_bytes.N_B; \ | |
506 | } | |
507 | ||
508 | ||
509 | void | |
510 | md_assemble (char * str) | |
511 | { | |
512 | char * bytes; | |
513 | fragS * frag_then = frag_now; | |
514 | int idx = 0; | |
515 | int i; | |
516 | int rel; | |
517 | expressionS *exp; | |
518 | ||
519 | /*printf("\033[32mASM: %s\033[0m\n", str);*/ | |
520 | ||
521 | dwarf2_emit_insn (0); | |
522 | ||
523 | memset (& rl78_bytes, 0, sizeof (rl78_bytes)); | |
524 | ||
525 | rl78_lex_init (str, str + strlen (str)); | |
526 | ||
527 | rl78_parse (); | |
528 | ||
9cea966c | 529 | /* This simplifies the relaxation code. */ |
0c315784 | 530 | if (rl78_bytes.n_relax || rl78_bytes.link_relax) |
9cea966c DD |
531 | { |
532 | int olen = rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops; | |
533 | /* We do it this way because we want the frag to have the | |
0c315784 DD |
534 | rl78_bytes in it, which we initialize above. The extra bytes |
535 | are for relaxing. */ | |
536 | bytes = frag_more (olen + 3); | |
9cea966c DD |
537 | frag_then = frag_now; |
538 | frag_variant (rs_machine_dependent, | |
539 | olen /* max_chars */, | |
540 | 0 /* var */, | |
541 | olen /* subtype */, | |
542 | 0 /* symbol */, | |
543 | 0 /* offset */, | |
544 | 0 /* opcode */); | |
545 | frag_then->fr_opcode = bytes; | |
546 | frag_then->fr_fix = olen + (bytes - frag_then->fr_literal); | |
547 | frag_then->fr_subtype = olen; | |
548 | frag_then->fr_var = 0; | |
549 | } | |
550 | else | |
551 | { | |
552 | bytes = frag_more (rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops); | |
553 | frag_then = frag_now; | |
554 | } | |
99c513f6 DD |
555 | |
556 | APPEND (prefix, n_prefix); | |
557 | APPEND (base, n_base); | |
558 | APPEND (ops, n_ops); | |
559 | ||
9cea966c DD |
560 | if (rl78_bytes.link_relax) |
561 | { | |
562 | fixS * f; | |
563 | ||
564 | f = fix_new (frag_then, | |
565 | (char *) bytes - frag_then->fr_literal, | |
566 | 0, | |
567 | abs_section_sym, | |
568 | rl78_bytes.link_relax | rl78_bytes.n_fixups, | |
569 | 0, | |
570 | BFD_RELOC_RL78_RELAX); | |
571 | frag_then->tc_frag_data->link_relax_fixP = f; | |
572 | } | |
573 | ||
99c513f6 DD |
574 | for (i = 0; i < rl78_bytes.n_fixups; i ++) |
575 | { | |
576 | /* index: [nbytes][type] */ | |
577 | static int reloc_map[5][4] = | |
578 | { | |
579 | { 0, 0 }, | |
580 | { BFD_RELOC_8, BFD_RELOC_8_PCREL }, | |
581 | { BFD_RELOC_16, BFD_RELOC_16_PCREL }, | |
582 | { BFD_RELOC_24, BFD_RELOC_24_PCREL }, | |
583 | { BFD_RELOC_32, BFD_RELOC_32_PCREL }, | |
584 | }; | |
585 | fixS * f; | |
586 | ||
587 | idx = rl78_bytes.fixups[i].offset / 8; | |
588 | rel = reloc_map [rl78_bytes.fixups[i].nbits / 8][(int) rl78_bytes.fixups[i].type]; | |
589 | ||
590 | if (rl78_bytes.fixups[i].reloc) | |
591 | rel = rl78_bytes.fixups[i].reloc; | |
592 | ||
593 | if (frag_then->tc_frag_data) | |
594 | exp = & frag_then->tc_frag_data->fixups[i].exp; | |
595 | else | |
596 | exp = & rl78_bytes.fixups[i].exp; | |
597 | ||
598 | f = fix_new_exp (frag_then, | |
599 | (char *) bytes + idx - frag_then->fr_literal, | |
600 | rl78_bytes.fixups[i].nbits / 8, | |
601 | exp, | |
602 | rl78_bytes.fixups[i].type == RL78REL_PCREL ? 1 : 0, | |
603 | rel); | |
604 | if (frag_then->tc_frag_data) | |
605 | frag_then->tc_frag_data->fixups[i].fixP = f; | |
606 | } | |
607 | } | |
608 | ||
609 | void | |
610 | rl78_cons_fix_new (fragS * frag, | |
611 | int where, | |
612 | int size, | |
613 | expressionS * exp) | |
614 | { | |
615 | bfd_reloc_code_real_type type; | |
c9d66558 | 616 | fixS *fixP; |
99c513f6 DD |
617 | |
618 | switch (size) | |
619 | { | |
620 | case 1: | |
621 | type = BFD_RELOC_8; | |
622 | break; | |
623 | case 2: | |
624 | type = BFD_RELOC_16; | |
625 | break; | |
626 | case 3: | |
627 | type = BFD_RELOC_24; | |
628 | break; | |
629 | case 4: | |
630 | type = BFD_RELOC_32; | |
631 | break; | |
632 | default: | |
633 | as_bad (_("unsupported constant size %d\n"), size); | |
634 | return; | |
635 | } | |
636 | ||
392ca752 DD |
637 | switch (exp->X_md) |
638 | { | |
4107ae22 DD |
639 | case BFD_RELOC_RL78_CODE: |
640 | if (size == 2) | |
641 | type = exp->X_md; | |
642 | break; | |
392ca752 DD |
643 | case BFD_RELOC_RL78_LO16: |
644 | case BFD_RELOC_RL78_HI16: | |
645 | if (size != 2) | |
646 | as_bad (_("%%hi16/%%lo16 only applies to .short or .hword")); | |
647 | type = exp->X_md; | |
648 | break; | |
649 | case BFD_RELOC_RL78_HI8: | |
650 | if (size != 1) | |
651 | as_bad (_("%%hi8 only applies to .byte")); | |
652 | type = exp->X_md; | |
653 | break; | |
654 | default: | |
655 | break; | |
656 | } | |
657 | ||
99c513f6 DD |
658 | if (exp->X_op == O_subtract && exp->X_op_symbol) |
659 | { | |
660 | if (size != 4 && size != 2 && size != 1) | |
661 | as_bad (_("difference of two symbols only supported with .long, .short, or .byte")); | |
662 | else | |
663 | type = BFD_RELOC_RL78_DIFF; | |
664 | } | |
665 | ||
c9d66558 DD |
666 | fixP = fix_new_exp (frag, where, (int) size, exp, 0, type); |
667 | switch (exp->X_md) | |
668 | { | |
669 | /* These are intended to have values larger than the container, | |
670 | since the backend puts only the portion we need in it. | |
671 | However, we don't have a backend-specific reloc for them as | |
672 | they're handled with complex relocations. */ | |
673 | case BFD_RELOC_RL78_LO16: | |
674 | case BFD_RELOC_RL78_HI16: | |
675 | case BFD_RELOC_RL78_HI8: | |
676 | fixP->fx_no_overflow = 1; | |
677 | break; | |
678 | default: | |
679 | break; | |
680 | } | |
99c513f6 DD |
681 | } |
682 | ||
0c315784 DD |
683 | \f |
684 | /*----------------------------------------------------------------------*/ | |
685 | /* To recap: we estimate everything based on md_estimate_size, then | |
686 | adjust based on rl78_relax_frag. When it all settles, we call | |
687 | md_convert frag to update the bytes. The relaxation types and | |
688 | relocations are in fragP->tc_frag_data, which is a copy of that | |
689 | rl78_bytes. | |
690 | ||
691 | Our scheme is as follows: fr_fix has the size of the smallest | |
692 | opcode (like BRA.S). We store the number of total bytes we need in | |
693 | fr_subtype. When we're done relaxing, we use fr_subtype and the | |
694 | existing opcode bytes to figure out what actual opcode we need to | |
695 | put in there. If the fixup isn't resolvable now, we use the | |
696 | maximal size. */ | |
697 | ||
698 | #define TRACE_RELAX 0 | |
699 | #define tprintf if (TRACE_RELAX) printf | |
700 | ||
701 | ||
702 | typedef enum | |
703 | { | |
704 | OT_other, | |
705 | OT_bt, | |
706 | OT_bt_sfr, | |
707 | OT_bt_es, | |
708 | OT_bc, | |
709 | OT_bh | |
710 | } op_type_T; | |
711 | ||
712 | /* We're looking for these types of relaxations: | |
713 | ||
714 | BT 00110001 sbit0cc1 addr---- (cc is 10 (BF) or 01 (BT)) | |
715 | B~T 00110001 sbit0cc1 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
716 | ||
717 | BT sfr 00110001 sbit0cc0 sfr----- addr---- | |
718 | BT ES: 00010001 00101110 sbit0cc1 addr---- | |
719 | ||
720 | BC 110111cc addr---- | |
721 | B~C 110111cc 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
722 | ||
723 | BH 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
724 | B~H 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
725 | */ | |
726 | ||
727 | /* Given the opcode bytes at OP, figure out which opcode it is and | |
728 | return the type of opcode. We use this to re-encode the opcode as | |
729 | a different size later. */ | |
730 | ||
731 | static op_type_T | |
732 | rl78_opcode_type (char * op) | |
733 | { | |
734 | if (op[0] == 0x31 | |
735 | && ((op[1] & 0x0f) == 0x05 | |
736 | || (op[1] & 0x0f) == 0x03)) | |
737 | return OT_bt; | |
738 | ||
739 | if (op[0] == 0x31 | |
740 | && ((op[1] & 0x0f) == 0x04 | |
741 | || (op[1] & 0x0f) == 0x02)) | |
742 | return OT_bt_sfr; | |
743 | ||
744 | if (op[0] == 0x11 | |
745 | && op[1] == 0x31 | |
746 | && ((op[2] & 0x0f) == 0x05 | |
747 | || (op[2] & 0x0f) == 0x03)) | |
748 | return OT_bt_es; | |
749 | ||
750 | if ((op[0] & 0xfc) == 0xdc) | |
751 | return OT_bc; | |
752 | ||
753 | if (op[0] == 0x61 | |
754 | && (op[1] & 0xef) == 0xc3) | |
755 | return OT_bh; | |
756 | ||
757 | return OT_other; | |
758 | } | |
759 | ||
760 | /* Returns zero if *addrP has the target address. Else returns nonzero | |
761 | if we cannot compute the target address yet. */ | |
762 | ||
763 | static int | |
764 | rl78_frag_fix_value (fragS * fragP, | |
765 | segT segment, | |
766 | int which, | |
767 | addressT * addrP, | |
768 | int need_diff, | |
769 | addressT * sym_addr) | |
770 | { | |
771 | addressT addr = 0; | |
772 | rl78_bytesT * b = fragP->tc_frag_data; | |
773 | expressionS * exp = & b->fixups[which].exp; | |
774 | ||
775 | if (need_diff && exp->X_op != O_subtract) | |
776 | return 1; | |
777 | ||
778 | if (exp->X_add_symbol) | |
779 | { | |
780 | if (S_FORCE_RELOC (exp->X_add_symbol, 1)) | |
781 | return 1; | |
782 | if (S_GET_SEGMENT (exp->X_add_symbol) != segment) | |
783 | return 1; | |
784 | addr += S_GET_VALUE (exp->X_add_symbol); | |
785 | } | |
786 | ||
787 | if (exp->X_op_symbol) | |
788 | { | |
789 | if (exp->X_op != O_subtract) | |
790 | return 1; | |
791 | if (S_FORCE_RELOC (exp->X_op_symbol, 1)) | |
792 | return 1; | |
793 | if (S_GET_SEGMENT (exp->X_op_symbol) != segment) | |
794 | return 1; | |
795 | addr -= S_GET_VALUE (exp->X_op_symbol); | |
796 | } | |
797 | if (sym_addr) | |
798 | * sym_addr = addr; | |
799 | addr += exp->X_add_number; | |
800 | * addrP = addr; | |
801 | return 0; | |
802 | } | |
803 | ||
804 | /* Estimate how big the opcode is after this relax pass. The return | |
805 | value is the difference between fr_fix and the actual size. We | |
806 | compute the total size in rl78_relax_frag and store it in fr_subtype, | |
807 | sowe only need to subtract fx_fix and return it. */ | |
808 | ||
99c513f6 DD |
809 | int |
810 | md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED, segT segment ATTRIBUTE_UNUSED) | |
811 | { | |
0c315784 DD |
812 | int opfixsize; |
813 | int delta; | |
814 | ||
815 | /* This is the size of the opcode that's accounted for in fr_fix. */ | |
816 | opfixsize = fragP->fr_fix - (fragP->fr_opcode - fragP->fr_literal); | |
817 | /* This is the size of the opcode that isn't. */ | |
818 | delta = (fragP->fr_subtype - opfixsize); | |
819 | ||
820 | tprintf (" -> opfixsize %d delta %d\n", opfixsize, delta); | |
821 | return delta; | |
822 | } | |
823 | ||
824 | /* Given the new addresses for this relax pass, figure out how big | |
825 | each opcode must be. We store the total number of bytes needed in | |
826 | fr_subtype. The return value is the difference between the size | |
827 | after the last pass and the size after this pass, so we use the old | |
828 | fr_subtype to calculate the difference. */ | |
829 | ||
830 | int | |
831 | rl78_relax_frag (segT segment ATTRIBUTE_UNUSED, fragS * fragP, long stretch) | |
832 | { | |
833 | addressT addr0, sym_addr; | |
834 | addressT mypc; | |
835 | int disp; | |
836 | int oldsize = fragP->fr_subtype; | |
837 | int newsize = oldsize; | |
838 | op_type_T optype; | |
839 | int ri; | |
840 | ||
841 | mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); | |
842 | ||
843 | /* If we ever get more than one reloc per opcode, this is the one | |
844 | we're relaxing. */ | |
845 | ri = 0; | |
846 | ||
847 | optype = rl78_opcode_type (fragP->fr_opcode); | |
848 | /* Try to get the target address. */ | |
849 | if (rl78_frag_fix_value (fragP, segment, ri, & addr0, | |
850 | fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH, | |
851 | & sym_addr)) | |
852 | { | |
853 | /* If we don't, we must use the maximum size for the linker. */ | |
854 | switch (fragP->tc_frag_data->relax[ri].type) | |
855 | { | |
856 | case RL78_RELAX_BRANCH: | |
857 | switch (optype) | |
858 | { | |
859 | case OT_bt: | |
860 | newsize = 6; | |
861 | break; | |
862 | case OT_bt_sfr: | |
863 | case OT_bt_es: | |
864 | newsize = 7; | |
865 | break; | |
866 | case OT_bc: | |
867 | newsize = 5; | |
868 | break; | |
869 | case OT_bh: | |
870 | newsize = 6; | |
871 | break; | |
872 | case OT_other: | |
873 | newsize = oldsize; | |
874 | break; | |
875 | } | |
876 | break; | |
877 | ||
878 | } | |
879 | fragP->fr_subtype = newsize; | |
880 | tprintf (" -> new %d old %d delta %d (external)\n", newsize, oldsize, newsize-oldsize); | |
881 | return newsize - oldsize; | |
882 | } | |
883 | ||
884 | if (sym_addr > mypc) | |
885 | addr0 += stretch; | |
886 | ||
887 | switch (fragP->tc_frag_data->relax[ri].type) | |
888 | { | |
889 | case RL78_RELAX_BRANCH: | |
890 | disp = (int) addr0 - (int) mypc; | |
891 | ||
892 | switch (optype) | |
893 | { | |
894 | case OT_bt: | |
895 | if (disp >= -128 && (disp - (oldsize-2)) <= 127) | |
896 | newsize = 3; | |
897 | else | |
898 | newsize = 6; | |
899 | break; | |
900 | case OT_bt_sfr: | |
901 | case OT_bt_es: | |
902 | if (disp >= -128 && (disp - (oldsize-3)) <= 127) | |
903 | newsize = 4; | |
904 | else | |
905 | newsize = 7; | |
906 | break; | |
907 | case OT_bc: | |
908 | if (disp >= -128 && (disp - (oldsize-1)) <= 127) | |
909 | newsize = 2; | |
910 | else | |
911 | newsize = 5; | |
912 | break; | |
913 | case OT_bh: | |
914 | if (disp >= -128 && (disp - (oldsize-2)) <= 127) | |
915 | newsize = 3; | |
916 | else | |
917 | newsize = 6; | |
918 | break; | |
919 | case OT_other: | |
920 | newsize = oldsize; | |
921 | break; | |
922 | } | |
923 | break; | |
924 | } | |
925 | ||
926 | /* This prevents infinite loops in align-heavy sources. */ | |
927 | if (newsize < oldsize) | |
928 | { | |
929 | if (fragP->tc_frag_data->times_shrank > 10 | |
930 | && fragP->tc_frag_data->times_grown > 10) | |
931 | newsize = oldsize; | |
932 | if (fragP->tc_frag_data->times_shrank < 20) | |
933 | fragP->tc_frag_data->times_shrank ++; | |
934 | } | |
935 | else if (newsize > oldsize) | |
936 | { | |
937 | if (fragP->tc_frag_data->times_grown < 20) | |
938 | fragP->tc_frag_data->times_grown ++; | |
939 | } | |
940 | ||
941 | fragP->fr_subtype = newsize; | |
942 | tprintf (" -> new %d old %d delta %d\n", newsize, oldsize, newsize-oldsize); | |
943 | return newsize - oldsize; | |
944 | } | |
945 | ||
946 | /* This lets us test for the opcode type and the desired size in a | |
947 | switch statement. */ | |
948 | #define OPCODE(type,size) ((type) * 16 + (size)) | |
949 | ||
950 | /* Given the opcode stored in fr_opcode and the number of bytes we | |
951 | think we need, encode a new opcode. We stored a pointer to the | |
952 | fixup for this opcode in the tc_frag_data structure. If we can do | |
953 | the fixup here, we change the relocation type to "none" (we test | |
954 | for that in tc_gen_reloc) else we change it to the right type for | |
955 | the new (biggest) opcode. */ | |
956 | ||
957 | void | |
958 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, | |
959 | segT segment ATTRIBUTE_UNUSED, | |
960 | fragS * fragP ATTRIBUTE_UNUSED) | |
961 | { | |
962 | rl78_bytesT * rl78b = fragP->tc_frag_data; | |
963 | addressT addr0, mypc; | |
964 | int disp; | |
965 | int reloc_type, reloc_adjust; | |
966 | char * op = fragP->fr_opcode; | |
967 | int keep_reloc = 0; | |
968 | int ri; | |
969 | int fi = (rl78b->n_fixups > 1) ? 1 : 0; | |
970 | fixS * fix = rl78b->fixups[fi].fixP; | |
971 | ||
972 | /* If we ever get more than one reloc per opcode, this is the one | |
973 | we're relaxing. */ | |
974 | ri = 0; | |
975 | ||
976 | /* We used a new frag for this opcode, so the opcode address should | |
977 | be the frag address. */ | |
978 | mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); | |
979 | tprintf("\033[32mmypc: 0x%x\033[0m\n", (int)mypc); | |
980 | ||
981 | /* Try to get the target address. If we fail here, we just use the | |
982 | largest format. */ | |
983 | if (rl78_frag_fix_value (fragP, segment, 0, & addr0, | |
984 | fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH, 0)) | |
985 | { | |
986 | /* We don't know the target address. */ | |
987 | keep_reloc = 1; | |
988 | addr0 = 0; | |
989 | disp = 0; | |
990 | tprintf ("unknown addr ? - %x = ?\n", (int)mypc); | |
991 | } | |
992 | else | |
993 | { | |
994 | /* We know the target address, and it's in addr0. */ | |
995 | disp = (int) addr0 - (int) mypc; | |
996 | tprintf ("known addr %x - %x = %d\n", (int)addr0, (int)mypc, disp); | |
997 | } | |
998 | ||
999 | if (linkrelax) | |
1000 | keep_reloc = 1; | |
1001 | ||
1002 | reloc_type = BFD_RELOC_NONE; | |
1003 | reloc_adjust = 0; | |
1004 | ||
1005 | switch (fragP->tc_frag_data->relax[ri].type) | |
1006 | { | |
1007 | case RL78_RELAX_BRANCH: | |
1008 | switch (OPCODE (rl78_opcode_type (fragP->fr_opcode), fragP->fr_subtype)) | |
1009 | { | |
1010 | ||
1011 | case OPCODE (OT_bt, 3): /* BT A,$ - no change. */ | |
1012 | disp -= 3; | |
1013 | op[2] = disp; | |
1014 | break; | |
1015 | ||
1016 | case OPCODE (OT_bt, 6): /* BT A,$ - long version. */ | |
1017 | disp -= 3; | |
1018 | op[1] ^= 0x06; /* toggle conditional. */ | |
1019 | op[2] = 3; /* displacement over long branch. */ | |
1020 | disp -= 3; | |
1021 | op[3] = 0xEE; /* BR $!addr20 */ | |
1022 | op[4] = disp & 0xff; | |
1023 | op[5] = disp >> 8; | |
1024 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1025 | reloc_adjust = 2; | |
1026 | break; | |
1027 | ||
1028 | case OPCODE (OT_bt_sfr, 4): /* BT PSW,$ - no change. */ | |
1029 | disp -= 4; | |
1030 | op[3] = disp; | |
1031 | break; | |
1032 | ||
1033 | case OPCODE (OT_bt_sfr, 7): /* BT PSW,$ - long version. */ | |
1034 | disp -= 4; | |
1035 | op[1] ^= 0x06; /* toggle conditional. */ | |
1036 | op[3] = 3; /* displacement over long branch. */ | |
1037 | disp -= 3; | |
1038 | op[4] = 0xEE; /* BR $!addr20 */ | |
1039 | op[5] = disp & 0xff; | |
1040 | op[6] = disp >> 8; | |
1041 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1042 | reloc_adjust = 2; | |
1043 | break; | |
1044 | ||
1045 | case OPCODE (OT_bt_es, 4): /* BT ES:[HL],$ - no change. */ | |
1046 | disp -= 4; | |
1047 | op[3] = disp; | |
1048 | break; | |
1049 | ||
1050 | case OPCODE (OT_bt_es, 7): /* BT PSW,$ - long version. */ | |
1051 | disp -= 4; | |
1052 | op[2] ^= 0x06; /* toggle conditional. */ | |
1053 | op[3] = 3; /* displacement over long branch. */ | |
1054 | disp -= 3; | |
1055 | op[4] = 0xEE; /* BR $!addr20 */ | |
1056 | op[5] = disp & 0xff; | |
1057 | op[6] = disp >> 8; | |
1058 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1059 | reloc_adjust = 2; | |
1060 | break; | |
1061 | ||
1062 | case OPCODE (OT_bc, 2): /* BC $ - no change. */ | |
1063 | disp -= 2; | |
1064 | op[1] = disp; | |
1065 | break; | |
1066 | ||
1067 | case OPCODE (OT_bc, 5): /* BC $ - long version. */ | |
1068 | disp -= 2; | |
1069 | op[0] ^= 0x02; /* toggle conditional. */ | |
1070 | op[1] = 3; | |
1071 | disp -= 3; | |
1072 | op[2] = 0xEE; /* BR $!addr20 */ | |
1073 | op[3] = disp & 0xff; | |
1074 | op[4] = disp >> 8; | |
1075 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1076 | reloc_adjust = 2; | |
1077 | break; | |
1078 | ||
1079 | case OPCODE (OT_bh, 3): /* BH $ - no change. */ | |
1080 | disp -= 3; | |
1081 | op[2] = disp; | |
1082 | break; | |
1083 | ||
1084 | case OPCODE (OT_bh, 6): /* BC $ - long version. */ | |
1085 | disp -= 3; | |
1086 | op[1] ^= 0x10; /* toggle conditional. */ | |
1087 | op[2] = 3; | |
1088 | disp -= 3; | |
1089 | op[3] = 0xEE; /* BR $!addr20 */ | |
1090 | op[4] = disp & 0xff; | |
1091 | op[5] = disp >> 8; | |
1092 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1093 | reloc_adjust = 2; | |
1094 | break; | |
1095 | ||
1096 | default: | |
1097 | fprintf(stderr, "Missed case %d %d at 0x%lx\n", | |
1098 | rl78_opcode_type (fragP->fr_opcode), fragP->fr_subtype, mypc); | |
1099 | abort (); | |
1100 | ||
1101 | } | |
1102 | break; | |
1103 | ||
1104 | default: | |
1105 | if (rl78b->n_fixups) | |
1106 | { | |
1107 | reloc_type = fix->fx_r_type; | |
1108 | reloc_adjust = 0; | |
1109 | } | |
1110 | break; | |
1111 | } | |
1112 | ||
1113 | if (rl78b->n_fixups) | |
1114 | { | |
1115 | ||
1116 | fix->fx_r_type = reloc_type; | |
1117 | fix->fx_where += reloc_adjust; | |
1118 | switch (reloc_type) | |
1119 | { | |
1120 | case BFD_RELOC_NONE: | |
1121 | fix->fx_size = 0; | |
1122 | break; | |
1123 | case BFD_RELOC_8: | |
1124 | fix->fx_size = 1; | |
1125 | break; | |
1126 | case BFD_RELOC_16_PCREL: | |
1127 | fix->fx_size = 2; | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | fragP->fr_fix = fragP->fr_subtype + (fragP->fr_opcode - fragP->fr_literal); | |
1133 | tprintf ("fragP->fr_fix now %ld (%d + (%p - %p)\n", (long) fragP->fr_fix, | |
1134 | fragP->fr_subtype, fragP->fr_opcode, fragP->fr_literal); | |
1135 | fragP->fr_var = 0; | |
1136 | ||
1137 | tprintf ("compare 0x%lx vs 0x%lx - 0x%lx = 0x%lx (%p)\n", | |
1138 | (long)fragP->fr_fix, | |
1139 | (long)fragP->fr_next->fr_address, (long)fragP->fr_address, | |
1140 | (long)(fragP->fr_next->fr_address - fragP->fr_address), | |
1141 | fragP->fr_next); | |
1142 | ||
1143 | if (fragP->fr_next != NULL | |
1144 | && ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) | |
1145 | != fragP->fr_fix)) | |
1146 | as_bad (_("bad frag at %p : fix %ld addr %ld %ld \n"), fragP, | |
1147 | (long) fragP->fr_fix, | |
1148 | (long) fragP->fr_address, (long) fragP->fr_next->fr_address); | |
99c513f6 | 1149 | } |
9cea966c | 1150 | |
0c315784 DD |
1151 | /* End of relaxation code. |
1152 | ----------------------------------------------------------------------*/ | |
1153 | \f | |
1154 | ||
99c513f6 DD |
1155 | arelent ** |
1156 | tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp) | |
1157 | { | |
1158 | static arelent * reloc[8]; | |
1159 | int rp; | |
99c513f6 DD |
1160 | |
1161 | if (fixp->fx_r_type == BFD_RELOC_NONE) | |
1162 | { | |
1163 | reloc[0] = NULL; | |
1164 | return reloc; | |
1165 | } | |
1166 | ||
1167 | if (fixp->fx_subsy | |
1168 | && S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
1169 | { | |
1170 | fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy); | |
1171 | fixp->fx_subsy = NULL; | |
1172 | } | |
1173 | ||
1174 | reloc[0] = (arelent *) xmalloc (sizeof (arelent)); | |
1175 | reloc[0]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
1176 | * reloc[0]->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
1177 | reloc[0]->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1178 | reloc[0]->addend = fixp->fx_offset; | |
1179 | ||
1180 | if (fixp->fx_r_type == BFD_RELOC_RL78_32_OP | |
1181 | && fixp->fx_subsy) | |
1182 | { | |
1183 | fixp->fx_r_type = BFD_RELOC_RL78_DIFF; | |
99c513f6 DD |
1184 | } |
1185 | ||
1186 | #define OPX(REL,SYM,ADD) \ | |
1187 | reloc[rp] = (arelent *) xmalloc (sizeof (arelent)); \ | |
1188 | reloc[rp]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); \ | |
1189 | reloc[rp]->howto = bfd_reloc_type_lookup (stdoutput, REL); \ | |
1190 | reloc[rp]->addend = ADD; \ | |
1191 | * reloc[rp]->sym_ptr_ptr = SYM; \ | |
1192 | reloc[rp]->address = fixp->fx_frag->fr_address + fixp->fx_where; \ | |
1193 | reloc[++rp] = NULL | |
1194 | #define OPSYM(SYM) OPX(BFD_RELOC_RL78_SYM, SYM, 0) | |
1195 | #define OPIMM(IMM) OPX(BFD_RELOC_RL78_SYM, abs_symbol.bsym, IMM) | |
1196 | #define OP(OP) OPX(BFD_RELOC_RL78_##OP, *reloc[0]->sym_ptr_ptr, 0) | |
1197 | #define SYM0() reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_SYM) | |
1198 | ||
1199 | rp = 1; | |
1200 | ||
1201 | /* Certain BFD relocations cannot be translated directly into | |
1202 | a single (non-Red Hat) RL78 relocation, but instead need | |
1203 | multiple RL78 relocations - handle them here. */ | |
1204 | switch (fixp->fx_r_type) | |
1205 | { | |
1206 | case BFD_RELOC_RL78_DIFF: | |
1207 | SYM0 (); | |
1208 | OPSYM (symbol_get_bfdsym (fixp->fx_subsy)); | |
1209 | OP(OP_SUBTRACT); | |
1210 | ||
1211 | switch (fixp->fx_size) | |
1212 | { | |
1213 | case 1: | |
1214 | OP(ABS8); | |
1215 | break; | |
1216 | case 2: | |
1217 | OP (ABS16); | |
1218 | break; | |
1219 | case 4: | |
1220 | OP (ABS32); | |
1221 | break; | |
1222 | } | |
1223 | break; | |
1224 | ||
1225 | case BFD_RELOC_RL78_NEG32: | |
1226 | SYM0 (); | |
1227 | OP (OP_NEG); | |
1228 | OP (ABS32); | |
1229 | break; | |
1230 | ||
4107ae22 | 1231 | case BFD_RELOC_RL78_CODE: |
b3fe4307 NC |
1232 | reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_16U); |
1233 | reloc[1] = NULL; | |
4107ae22 DD |
1234 | break; |
1235 | ||
99c513f6 DD |
1236 | case BFD_RELOC_RL78_LO16: |
1237 | SYM0 (); | |
1238 | OPIMM (0xffff); | |
1239 | OP (OP_AND); | |
1240 | OP (ABS16); | |
1241 | break; | |
1242 | ||
1243 | case BFD_RELOC_RL78_HI16: | |
1244 | SYM0 (); | |
1245 | OPIMM (16); | |
1246 | OP (OP_SHRA); | |
1247 | OP (ABS16); | |
1248 | break; | |
1249 | ||
1250 | case BFD_RELOC_RL78_HI8: | |
1251 | SYM0 (); | |
1252 | OPIMM (16); | |
1253 | OP (OP_SHRA); | |
1254 | OPIMM (0xff); | |
1255 | OP (OP_AND); | |
1256 | OP (ABS8); | |
1257 | break; | |
1258 | ||
1259 | default: | |
1260 | reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
1261 | reloc[1] = NULL; | |
1262 | break; | |
1263 | } | |
1264 | ||
1265 | return reloc; | |
1266 | } | |
1267 | ||
1268 | int | |
1269 | rl78_validate_fix_sub (struct fix * f) | |
1270 | { | |
1271 | /* We permit the subtraction of two symbols in a few cases. */ | |
1272 | /* mov #sym1-sym2, R3 */ | |
1273 | if (f->fx_r_type == BFD_RELOC_RL78_32_OP) | |
1274 | return 1; | |
1275 | /* .long sym1-sym2 */ | |
1276 | if (f->fx_r_type == BFD_RELOC_RL78_DIFF | |
1277 | && ! f->fx_pcrel | |
1278 | && (f->fx_size == 4 || f->fx_size == 2 || f->fx_size == 1)) | |
1279 | return 1; | |
1280 | return 0; | |
1281 | } | |
1282 | ||
1283 | long | |
1284 | md_pcrel_from_section (fixS * fixP, segT sec) | |
1285 | { | |
1286 | long rv; | |
1287 | ||
1288 | if (fixP->fx_addsy != NULL | |
1289 | && (! S_IS_DEFINED (fixP->fx_addsy) | |
1290 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) | |
1291 | /* The symbol is undefined (or is defined but not in this section). | |
1292 | Let the linker figure it out. */ | |
1293 | return 0; | |
1294 | ||
1295 | rv = fixP->fx_frag->fr_address + fixP->fx_where; | |
1296 | switch (fixP->fx_r_type) | |
1297 | { | |
1298 | case BFD_RELOC_8_PCREL: | |
1299 | rv += 1; | |
1300 | break; | |
1301 | case BFD_RELOC_16_PCREL: | |
1302 | rv += 2; | |
1303 | break; | |
1304 | default: | |
1305 | break; | |
1306 | } | |
1307 | return rv; | |
1308 | } | |
1309 | ||
1310 | void | |
1311 | md_apply_fix (struct fix * f ATTRIBUTE_UNUSED, | |
1312 | valueT * t ATTRIBUTE_UNUSED, | |
1313 | segT s ATTRIBUTE_UNUSED) | |
1314 | { | |
1315 | char * op; | |
1316 | unsigned long val; | |
1317 | ||
1318 | if (f->fx_addsy && S_FORCE_RELOC (f->fx_addsy, 1)) | |
1319 | return; | |
1320 | if (f->fx_subsy && S_FORCE_RELOC (f->fx_subsy, 1)) | |
1321 | return; | |
1322 | ||
1323 | op = f->fx_frag->fr_literal + f->fx_where; | |
1324 | val = (unsigned long) * t; | |
1325 | ||
1326 | switch (f->fx_r_type) | |
1327 | { | |
1328 | case BFD_RELOC_NONE: | |
1329 | break; | |
1330 | ||
9cea966c DD |
1331 | case BFD_RELOC_RL78_RELAX: |
1332 | f->fx_done = 1; | |
1333 | break; | |
1334 | ||
99c513f6 | 1335 | case BFD_RELOC_8_PCREL: |
0a899fd5 DD |
1336 | if ((long)val < -128 || (long)val > 127) |
1337 | as_bad_where (f->fx_file, f->fx_line, | |
1338 | _("value of %ld too large for 8-bit branch"), | |
1339 | val); | |
1340 | /* Fall through. */ | |
1341 | case BFD_RELOC_8: | |
99c513f6 DD |
1342 | op[0] = val; |
1343 | break; | |
1344 | ||
99c513f6 | 1345 | case BFD_RELOC_16_PCREL: |
0a899fd5 DD |
1346 | if ((long)val < -32768 || (long)val > 32767) |
1347 | as_bad_where (f->fx_file, f->fx_line, | |
1348 | _("value of %ld too large for 16-bit branch"), | |
1349 | val); | |
1350 | /* Fall through. */ | |
1351 | case BFD_RELOC_16: | |
4107ae22 | 1352 | case BFD_RELOC_RL78_CODE: |
99c513f6 DD |
1353 | op[0] = val; |
1354 | op[1] = val >> 8; | |
1355 | break; | |
1356 | ||
1357 | case BFD_RELOC_24: | |
1358 | op[0] = val; | |
1359 | op[1] = val >> 8; | |
1360 | op[2] = val >> 16; | |
1361 | break; | |
1362 | ||
1363 | case BFD_RELOC_32: | |
99c513f6 DD |
1364 | op[0] = val; |
1365 | op[1] = val >> 8; | |
1366 | op[2] = val >> 16; | |
1367 | op[3] = val >> 24; | |
1368 | break; | |
1369 | ||
3ce3a066 NC |
1370 | case BFD_RELOC_RL78_DIFF: |
1371 | op[0] = val; | |
1372 | if (f->fx_size > 1) | |
1373 | op[1] = val >> 8; | |
1374 | if (f->fx_size > 2) | |
1375 | op[2] = val >> 16; | |
1376 | if (f->fx_size > 3) | |
1377 | op[3] = val >> 24; | |
1378 | break; | |
1379 | ||
b3fe4307 NC |
1380 | case BFD_RELOC_RL78_HI8: |
1381 | val = val >> 16; | |
1382 | op[0] = val; | |
1383 | break; | |
1384 | ||
1385 | case BFD_RELOC_RL78_HI16: | |
1386 | val = val >> 16; | |
1387 | op[0] = val; | |
1388 | op[1] = val >> 8; | |
1389 | break; | |
1390 | ||
1391 | case BFD_RELOC_RL78_LO16: | |
1392 | op[0] = val; | |
1393 | op[1] = val >> 8; | |
1394 | break; | |
1395 | ||
99c513f6 DD |
1396 | default: |
1397 | as_bad (_("Unknown reloc in md_apply_fix: %s"), | |
1398 | bfd_get_reloc_code_name (f->fx_r_type)); | |
1399 | break; | |
1400 | } | |
1401 | ||
1402 | if (f->fx_addsy == NULL) | |
1403 | f->fx_done = 1; | |
1404 | } | |
1405 | ||
1406 | valueT | |
1407 | md_section_align (segT segment, valueT size) | |
1408 | { | |
1409 | int align = bfd_get_section_alignment (stdoutput, segment); | |
1410 | return ((size + (1 << align) - 1) & (-1 << align)); | |
1411 | } |