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, |
1740ba0c NC |
284 | OPTION_G13, |
285 | OPTION_G14, | |
856ea05c KP |
286 | OPTION_32BIT_DOUBLES, |
287 | OPTION_64BIT_DOUBLES, | |
9cea966c DD |
288 | }; |
289 | ||
99c513f6 DD |
290 | #define RL78_SHORTOPTS "" |
291 | const char * md_shortopts = RL78_SHORTOPTS; | |
292 | ||
293 | /* Assembler options. */ | |
294 | struct option md_longopts[] = | |
295 | { | |
9cea966c | 296 | {"relax", no_argument, NULL, OPTION_RELAX}, |
4046d87a | 297 | {"mg10", no_argument, NULL, OPTION_G10}, |
1740ba0c NC |
298 | {"mg13", no_argument, NULL, OPTION_G13}, |
299 | {"mg14", no_argument, NULL, OPTION_G14}, | |
300 | {"mrl78", no_argument, NULL, OPTION_G14}, | |
856ea05c KP |
301 | {"m32bit-doubles", no_argument, NULL, OPTION_32BIT_DOUBLES}, |
302 | {"m64bit-doubles", no_argument, NULL, OPTION_64BIT_DOUBLES}, | |
99c513f6 DD |
303 | {NULL, no_argument, NULL, 0} |
304 | }; | |
305 | size_t md_longopts_size = sizeof (md_longopts); | |
306 | ||
307 | int | |
9cea966c | 308 | md_parse_option (int c, char * arg ATTRIBUTE_UNUSED) |
99c513f6 | 309 | { |
9cea966c DD |
310 | switch (c) |
311 | { | |
312 | case OPTION_RELAX: | |
313 | linkrelax = 1; | |
314 | return 1; | |
315 | ||
4046d87a | 316 | case OPTION_G10: |
1740ba0c | 317 | elf_flags &= ~ E_FLAG_RL78_CPU_MASK; |
4046d87a NC |
318 | elf_flags |= E_FLAG_RL78_G10; |
319 | return 1; | |
856ea05c | 320 | |
1740ba0c NC |
321 | case OPTION_G13: |
322 | elf_flags &= ~ E_FLAG_RL78_CPU_MASK; | |
323 | elf_flags |= E_FLAG_RL78_G13; | |
324 | return 1; | |
325 | ||
326 | case OPTION_G14: | |
327 | elf_flags &= ~ E_FLAG_RL78_CPU_MASK; | |
328 | elf_flags |= E_FLAG_RL78_G14; | |
329 | return 1; | |
330 | ||
856ea05c KP |
331 | case OPTION_32BIT_DOUBLES: |
332 | elf_flags &= ~ E_FLAG_RL78_64BIT_DOUBLES; | |
333 | return 1; | |
334 | ||
335 | case OPTION_64BIT_DOUBLES: | |
336 | elf_flags |= E_FLAG_RL78_64BIT_DOUBLES; | |
337 | return 1; | |
9cea966c | 338 | } |
99c513f6 DD |
339 | return 0; |
340 | } | |
341 | ||
0952813b DD |
342 | int |
343 | rl78_isa_g10 (void) | |
344 | { | |
345 | return (elf_flags & E_FLAG_RL78_CPU_MASK) == E_FLAG_RL78_G10; | |
346 | } | |
347 | ||
348 | int | |
349 | rl78_isa_g13 (void) | |
350 | { | |
351 | return (elf_flags & E_FLAG_RL78_CPU_MASK) == E_FLAG_RL78_G13; | |
352 | } | |
353 | ||
354 | int | |
355 | rl78_isa_g14 (void) | |
356 | { | |
357 | return (elf_flags & E_FLAG_RL78_CPU_MASK) == E_FLAG_RL78_G14; | |
358 | } | |
359 | ||
99c513f6 | 360 | void |
6ff71e76 | 361 | md_show_usage (FILE * stream) |
99c513f6 | 362 | { |
856ea05c | 363 | fprintf (stream, _(" RL78 specific command line options:\n")); |
6ff71e76 | 364 | fprintf (stream, _(" --mrelax Enable link time relaxation\n")); |
856ea05c | 365 | fprintf (stream, _(" --mg10 Enable support for G10 variant\n")); |
1740ba0c NC |
366 | fprintf (stream, _(" --mg13 Selects the G13 core.\n")); |
367 | fprintf (stream, _(" --mg14 Selects the G14 core [default]\n")); | |
368 | fprintf (stream, _(" --mrl78 Alias for --mg14\n")); | |
856ea05c | 369 | fprintf (stream, _(" --m32bit-doubles [default]\n")); |
6ff71e76 | 370 | fprintf (stream, _(" --m64bit-doubles Source code uses 64-bit doubles\n")); |
99c513f6 DD |
371 | } |
372 | ||
99c513f6 DD |
373 | static void |
374 | s_bss (int ignore ATTRIBUTE_UNUSED) | |
375 | { | |
376 | int temp; | |
377 | ||
378 | temp = get_absolute_expression (); | |
379 | subseg_set (bss_section, (subsegT) temp); | |
380 | demand_empty_rest_of_line (); | |
381 | } | |
382 | ||
856ea05c KP |
383 | static void |
384 | rl78_float_cons (int ignore ATTRIBUTE_UNUSED) | |
385 | { | |
386 | if (elf_flags & E_FLAG_RL78_64BIT_DOUBLES) | |
387 | return float_cons ('d'); | |
388 | return float_cons ('f'); | |
389 | } | |
390 | ||
99c513f6 DD |
391 | /* The target specific pseudo-ops which we support. */ |
392 | const pseudo_typeS md_pseudo_table[] = | |
393 | { | |
856ea05c KP |
394 | /* Our "standard" pseudos. */ |
395 | { "double", rl78_float_cons, 'd' }, | |
396 | { "bss", s_bss, 0 }, | |
397 | { "3byte", cons, 3 }, | |
398 | { "int", cons, 4 }, | |
399 | { "word", cons, 4 }, | |
99c513f6 DD |
400 | |
401 | /* End of list marker. */ | |
402 | { NULL, NULL, 0 } | |
403 | }; | |
404 | ||
aff1a65e NC |
405 | static symbolS * rl78_abs_sym = NULL; |
406 | ||
99c513f6 DD |
407 | void |
408 | md_begin (void) | |
409 | { | |
aff1a65e | 410 | rl78_abs_sym = symbol_make ("__rl78_abs__"); |
99c513f6 DD |
411 | } |
412 | ||
413 | void | |
414 | rl78_md_end (void) | |
415 | { | |
416 | } | |
417 | ||
4046d87a NC |
418 | /* Set the ELF specific flags. */ |
419 | void | |
420 | rl78_elf_final_processing (void) | |
421 | { | |
422 | elf_elfheader (stdoutput)->e_flags |= elf_flags; | |
423 | } | |
424 | ||
99c513f6 DD |
425 | /* Write a value out to the object file, using the appropriate endianness. */ |
426 | void | |
427 | md_number_to_chars (char * buf, valueT val, int n) | |
428 | { | |
429 | number_to_chars_littleendian (buf, val, n); | |
430 | } | |
431 | ||
c9d66558 DD |
432 | static void |
433 | require_end_of_expr (char *fname) | |
434 | { | |
435 | while (* input_line_pointer == ' ' | |
436 | || * input_line_pointer == '\t') | |
437 | input_line_pointer ++; | |
438 | ||
439 | if (! * input_line_pointer | |
440 | || strchr ("\n\r,", * input_line_pointer) | |
441 | || strchr (comment_chars, * input_line_pointer) | |
442 | || strchr (line_comment_chars, * input_line_pointer) | |
443 | || strchr (line_separator_chars, * input_line_pointer)) | |
444 | return; | |
445 | ||
446 | as_bad (_("%%%s() must be outermost term in expression"), fname); | |
447 | } | |
448 | ||
99c513f6 DD |
449 | static struct |
450 | { | |
451 | char * fname; | |
452 | int reloc; | |
453 | } | |
454 | reloc_functions[] = | |
455 | { | |
4107ae22 | 456 | { "code", BFD_RELOC_RL78_CODE }, |
99c513f6 DD |
457 | { "lo16", BFD_RELOC_RL78_LO16 }, |
458 | { "hi16", BFD_RELOC_RL78_HI16 }, | |
459 | { "hi8", BFD_RELOC_RL78_HI8 }, | |
460 | { 0, 0 } | |
461 | }; | |
462 | ||
463 | void | |
464 | md_operand (expressionS * exp ATTRIBUTE_UNUSED) | |
465 | { | |
466 | int reloc = 0; | |
467 | int i; | |
468 | ||
469 | for (i = 0; reloc_functions[i].fname; i++) | |
470 | { | |
471 | int flen = strlen (reloc_functions[i].fname); | |
472 | ||
473 | if (input_line_pointer[0] == '%' | |
474 | && strncasecmp (input_line_pointer + 1, reloc_functions[i].fname, flen) == 0 | |
475 | && input_line_pointer[flen + 1] == '(') | |
476 | { | |
477 | reloc = reloc_functions[i].reloc; | |
478 | input_line_pointer += flen + 2; | |
479 | break; | |
480 | } | |
481 | } | |
482 | if (reloc == 0) | |
483 | return; | |
484 | ||
485 | expression (exp); | |
486 | if (* input_line_pointer == ')') | |
487 | input_line_pointer ++; | |
488 | ||
489 | exp->X_md = reloc; | |
c9d66558 DD |
490 | |
491 | require_end_of_expr (reloc_functions[i].fname); | |
99c513f6 DD |
492 | } |
493 | ||
494 | void | |
495 | rl78_frag_init (fragS * fragP) | |
496 | { | |
9cea966c DD |
497 | if (rl78_bytes.n_relax || rl78_bytes.link_relax) |
498 | { | |
499 | fragP->tc_frag_data = malloc (sizeof (rl78_bytesT)); | |
500 | memcpy (fragP->tc_frag_data, & rl78_bytes, sizeof (rl78_bytesT)); | |
501 | } | |
502 | else | |
503 | fragP->tc_frag_data = 0; | |
504 | } | |
505 | ||
506 | /* When relaxing, we need to output a reloc for any .align directive | |
507 | so that we can retain this alignment as we adjust opcode sizes. */ | |
508 | void | |
509 | rl78_handle_align (fragS * frag) | |
510 | { | |
511 | if (linkrelax | |
512 | && (frag->fr_type == rs_align | |
513 | || frag->fr_type == rs_align_code) | |
514 | && frag->fr_address + frag->fr_fix > 0 | |
515 | && frag->fr_offset > 0 | |
516 | && now_seg != bss_section) | |
517 | { | |
518 | fix_new (frag, frag->fr_fix, 0, | |
519 | &abs_symbol, RL78_RELAXA_ALIGN + frag->fr_offset, | |
520 | 0, BFD_RELOC_RL78_RELAX); | |
521 | /* For the purposes of relaxation, this relocation is attached | |
522 | to the byte *after* the alignment - i.e. the byte that must | |
523 | remain aligned. */ | |
524 | fix_new (frag->fr_next, 0, 0, | |
525 | &abs_symbol, RL78_RELAXA_ELIGN + frag->fr_offset, | |
526 | 0, BFD_RELOC_RL78_RELAX); | |
527 | } | |
99c513f6 DD |
528 | } |
529 | ||
530 | char * | |
531 | md_atof (int type, char * litP, int * sizeP) | |
532 | { | |
533 | return ieee_md_atof (type, litP, sizeP, target_big_endian); | |
534 | } | |
535 | ||
536 | symbolS * | |
537 | md_undefined_symbol (char * name ATTRIBUTE_UNUSED) | |
538 | { | |
539 | return NULL; | |
540 | } | |
541 | ||
542 | #define APPEND(B, N_B) \ | |
543 | if (rl78_bytes.N_B) \ | |
544 | { \ | |
545 | memcpy (bytes + idx, rl78_bytes.B, rl78_bytes.N_B); \ | |
546 | idx += rl78_bytes.N_B; \ | |
547 | } | |
548 | ||
549 | ||
550 | void | |
551 | md_assemble (char * str) | |
552 | { | |
553 | char * bytes; | |
554 | fragS * frag_then = frag_now; | |
555 | int idx = 0; | |
556 | int i; | |
557 | int rel; | |
558 | expressionS *exp; | |
559 | ||
560 | /*printf("\033[32mASM: %s\033[0m\n", str);*/ | |
561 | ||
562 | dwarf2_emit_insn (0); | |
563 | ||
564 | memset (& rl78_bytes, 0, sizeof (rl78_bytes)); | |
565 | ||
566 | rl78_lex_init (str, str + strlen (str)); | |
567 | ||
568 | rl78_parse (); | |
569 | ||
9cea966c | 570 | /* This simplifies the relaxation code. */ |
0c315784 | 571 | if (rl78_bytes.n_relax || rl78_bytes.link_relax) |
9cea966c DD |
572 | { |
573 | int olen = rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops; | |
574 | /* We do it this way because we want the frag to have the | |
0c315784 DD |
575 | rl78_bytes in it, which we initialize above. The extra bytes |
576 | are for relaxing. */ | |
577 | bytes = frag_more (olen + 3); | |
9cea966c DD |
578 | frag_then = frag_now; |
579 | frag_variant (rs_machine_dependent, | |
580 | olen /* max_chars */, | |
581 | 0 /* var */, | |
582 | olen /* subtype */, | |
583 | 0 /* symbol */, | |
584 | 0 /* offset */, | |
585 | 0 /* opcode */); | |
586 | frag_then->fr_opcode = bytes; | |
587 | frag_then->fr_fix = olen + (bytes - frag_then->fr_literal); | |
588 | frag_then->fr_subtype = olen; | |
589 | frag_then->fr_var = 0; | |
590 | } | |
591 | else | |
592 | { | |
593 | bytes = frag_more (rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops); | |
594 | frag_then = frag_now; | |
595 | } | |
99c513f6 DD |
596 | |
597 | APPEND (prefix, n_prefix); | |
598 | APPEND (base, n_base); | |
599 | APPEND (ops, n_ops); | |
600 | ||
9cea966c DD |
601 | if (rl78_bytes.link_relax) |
602 | { | |
603 | fixS * f; | |
604 | ||
605 | f = fix_new (frag_then, | |
606 | (char *) bytes - frag_then->fr_literal, | |
607 | 0, | |
608 | abs_section_sym, | |
609 | rl78_bytes.link_relax | rl78_bytes.n_fixups, | |
610 | 0, | |
611 | BFD_RELOC_RL78_RELAX); | |
612 | frag_then->tc_frag_data->link_relax_fixP = f; | |
613 | } | |
614 | ||
99c513f6 DD |
615 | for (i = 0; i < rl78_bytes.n_fixups; i ++) |
616 | { | |
617 | /* index: [nbytes][type] */ | |
618 | static int reloc_map[5][4] = | |
619 | { | |
620 | { 0, 0 }, | |
621 | { BFD_RELOC_8, BFD_RELOC_8_PCREL }, | |
622 | { BFD_RELOC_16, BFD_RELOC_16_PCREL }, | |
623 | { BFD_RELOC_24, BFD_RELOC_24_PCREL }, | |
624 | { BFD_RELOC_32, BFD_RELOC_32_PCREL }, | |
625 | }; | |
626 | fixS * f; | |
627 | ||
628 | idx = rl78_bytes.fixups[i].offset / 8; | |
629 | rel = reloc_map [rl78_bytes.fixups[i].nbits / 8][(int) rl78_bytes.fixups[i].type]; | |
630 | ||
631 | if (rl78_bytes.fixups[i].reloc) | |
632 | rel = rl78_bytes.fixups[i].reloc; | |
633 | ||
634 | if (frag_then->tc_frag_data) | |
635 | exp = & frag_then->tc_frag_data->fixups[i].exp; | |
636 | else | |
637 | exp = & rl78_bytes.fixups[i].exp; | |
638 | ||
639 | f = fix_new_exp (frag_then, | |
640 | (char *) bytes + idx - frag_then->fr_literal, | |
641 | rl78_bytes.fixups[i].nbits / 8, | |
642 | exp, | |
643 | rl78_bytes.fixups[i].type == RL78REL_PCREL ? 1 : 0, | |
644 | rel); | |
645 | if (frag_then->tc_frag_data) | |
646 | frag_then->tc_frag_data->fixups[i].fixP = f; | |
647 | } | |
648 | } | |
649 | ||
650 | void | |
651 | rl78_cons_fix_new (fragS * frag, | |
652 | int where, | |
653 | int size, | |
654 | expressionS * exp) | |
655 | { | |
656 | bfd_reloc_code_real_type type; | |
c9d66558 | 657 | fixS *fixP; |
99c513f6 DD |
658 | |
659 | switch (size) | |
660 | { | |
661 | case 1: | |
662 | type = BFD_RELOC_8; | |
663 | break; | |
664 | case 2: | |
665 | type = BFD_RELOC_16; | |
666 | break; | |
667 | case 3: | |
668 | type = BFD_RELOC_24; | |
669 | break; | |
670 | case 4: | |
671 | type = BFD_RELOC_32; | |
672 | break; | |
673 | default: | |
674 | as_bad (_("unsupported constant size %d\n"), size); | |
675 | return; | |
676 | } | |
677 | ||
392ca752 DD |
678 | switch (exp->X_md) |
679 | { | |
4107ae22 DD |
680 | case BFD_RELOC_RL78_CODE: |
681 | if (size == 2) | |
682 | type = exp->X_md; | |
683 | break; | |
392ca752 DD |
684 | case BFD_RELOC_RL78_LO16: |
685 | case BFD_RELOC_RL78_HI16: | |
686 | if (size != 2) | |
6ff71e76 NC |
687 | { |
688 | /* Fixups to assembler generated expressions do not use %hi or %lo. */ | |
689 | if (frag->fr_file) | |
690 | as_bad (_("%%hi16/%%lo16 only applies to .short or .hword")); | |
691 | } | |
692 | else | |
693 | type = exp->X_md; | |
392ca752 DD |
694 | break; |
695 | case BFD_RELOC_RL78_HI8: | |
696 | if (size != 1) | |
6ff71e76 NC |
697 | { |
698 | /* Fixups to assembler generated expressions do not use %hi or %lo. */ | |
699 | if (frag->fr_file) | |
700 | as_bad (_("%%hi8 only applies to .byte")); | |
701 | } | |
702 | else | |
703 | type = exp->X_md; | |
392ca752 DD |
704 | break; |
705 | default: | |
706 | break; | |
707 | } | |
708 | ||
99c513f6 DD |
709 | if (exp->X_op == O_subtract && exp->X_op_symbol) |
710 | { | |
711 | if (size != 4 && size != 2 && size != 1) | |
712 | as_bad (_("difference of two symbols only supported with .long, .short, or .byte")); | |
713 | else | |
714 | type = BFD_RELOC_RL78_DIFF; | |
715 | } | |
716 | ||
c9d66558 DD |
717 | fixP = fix_new_exp (frag, where, (int) size, exp, 0, type); |
718 | switch (exp->X_md) | |
719 | { | |
720 | /* These are intended to have values larger than the container, | |
721 | since the backend puts only the portion we need in it. | |
722 | However, we don't have a backend-specific reloc for them as | |
723 | they're handled with complex relocations. */ | |
724 | case BFD_RELOC_RL78_LO16: | |
725 | case BFD_RELOC_RL78_HI16: | |
726 | case BFD_RELOC_RL78_HI8: | |
727 | fixP->fx_no_overflow = 1; | |
728 | break; | |
729 | default: | |
730 | break; | |
731 | } | |
99c513f6 DD |
732 | } |
733 | ||
0c315784 DD |
734 | \f |
735 | /*----------------------------------------------------------------------*/ | |
736 | /* To recap: we estimate everything based on md_estimate_size, then | |
737 | adjust based on rl78_relax_frag. When it all settles, we call | |
738 | md_convert frag to update the bytes. The relaxation types and | |
739 | relocations are in fragP->tc_frag_data, which is a copy of that | |
740 | rl78_bytes. | |
741 | ||
742 | Our scheme is as follows: fr_fix has the size of the smallest | |
743 | opcode (like BRA.S). We store the number of total bytes we need in | |
744 | fr_subtype. When we're done relaxing, we use fr_subtype and the | |
745 | existing opcode bytes to figure out what actual opcode we need to | |
746 | put in there. If the fixup isn't resolvable now, we use the | |
747 | maximal size. */ | |
748 | ||
749 | #define TRACE_RELAX 0 | |
750 | #define tprintf if (TRACE_RELAX) printf | |
751 | ||
752 | ||
753 | typedef enum | |
754 | { | |
755 | OT_other, | |
756 | OT_bt, | |
757 | OT_bt_sfr, | |
758 | OT_bt_es, | |
759 | OT_bc, | |
760 | OT_bh | |
761 | } op_type_T; | |
762 | ||
763 | /* We're looking for these types of relaxations: | |
764 | ||
765 | BT 00110001 sbit0cc1 addr---- (cc is 10 (BF) or 01 (BT)) | |
766 | B~T 00110001 sbit0cc1 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
767 | ||
768 | BT sfr 00110001 sbit0cc0 sfr----- addr---- | |
769 | BT ES: 00010001 00101110 sbit0cc1 addr---- | |
770 | ||
771 | BC 110111cc addr---- | |
772 | B~C 110111cc 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
773 | ||
774 | BH 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
775 | B~H 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
776 | */ | |
777 | ||
778 | /* Given the opcode bytes at OP, figure out which opcode it is and | |
779 | return the type of opcode. We use this to re-encode the opcode as | |
780 | a different size later. */ | |
781 | ||
782 | static op_type_T | |
783 | rl78_opcode_type (char * op) | |
784 | { | |
785 | if (op[0] == 0x31 | |
786 | && ((op[1] & 0x0f) == 0x05 | |
787 | || (op[1] & 0x0f) == 0x03)) | |
788 | return OT_bt; | |
789 | ||
790 | if (op[0] == 0x31 | |
791 | && ((op[1] & 0x0f) == 0x04 | |
792 | || (op[1] & 0x0f) == 0x02)) | |
793 | return OT_bt_sfr; | |
794 | ||
795 | if (op[0] == 0x11 | |
796 | && op[1] == 0x31 | |
797 | && ((op[2] & 0x0f) == 0x05 | |
798 | || (op[2] & 0x0f) == 0x03)) | |
799 | return OT_bt_es; | |
800 | ||
801 | if ((op[0] & 0xfc) == 0xdc) | |
802 | return OT_bc; | |
803 | ||
804 | if (op[0] == 0x61 | |
805 | && (op[1] & 0xef) == 0xc3) | |
806 | return OT_bh; | |
807 | ||
808 | return OT_other; | |
809 | } | |
810 | ||
811 | /* Returns zero if *addrP has the target address. Else returns nonzero | |
812 | if we cannot compute the target address yet. */ | |
813 | ||
814 | static int | |
815 | rl78_frag_fix_value (fragS * fragP, | |
816 | segT segment, | |
817 | int which, | |
818 | addressT * addrP, | |
819 | int need_diff, | |
820 | addressT * sym_addr) | |
821 | { | |
822 | addressT addr = 0; | |
823 | rl78_bytesT * b = fragP->tc_frag_data; | |
824 | expressionS * exp = & b->fixups[which].exp; | |
825 | ||
826 | if (need_diff && exp->X_op != O_subtract) | |
827 | return 1; | |
828 | ||
829 | if (exp->X_add_symbol) | |
830 | { | |
831 | if (S_FORCE_RELOC (exp->X_add_symbol, 1)) | |
832 | return 1; | |
833 | if (S_GET_SEGMENT (exp->X_add_symbol) != segment) | |
834 | return 1; | |
835 | addr += S_GET_VALUE (exp->X_add_symbol); | |
836 | } | |
837 | ||
838 | if (exp->X_op_symbol) | |
839 | { | |
840 | if (exp->X_op != O_subtract) | |
841 | return 1; | |
842 | if (S_FORCE_RELOC (exp->X_op_symbol, 1)) | |
843 | return 1; | |
844 | if (S_GET_SEGMENT (exp->X_op_symbol) != segment) | |
845 | return 1; | |
846 | addr -= S_GET_VALUE (exp->X_op_symbol); | |
847 | } | |
848 | if (sym_addr) | |
849 | * sym_addr = addr; | |
850 | addr += exp->X_add_number; | |
851 | * addrP = addr; | |
852 | return 0; | |
853 | } | |
854 | ||
855 | /* Estimate how big the opcode is after this relax pass. The return | |
856 | value is the difference between fr_fix and the actual size. We | |
857 | compute the total size in rl78_relax_frag and store it in fr_subtype, | |
6ff71e76 | 858 | so we only need to subtract fx_fix and return it. */ |
0c315784 | 859 | |
99c513f6 DD |
860 | int |
861 | md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED, segT segment ATTRIBUTE_UNUSED) | |
862 | { | |
0c315784 DD |
863 | int opfixsize; |
864 | int delta; | |
865 | ||
866 | /* This is the size of the opcode that's accounted for in fr_fix. */ | |
867 | opfixsize = fragP->fr_fix - (fragP->fr_opcode - fragP->fr_literal); | |
868 | /* This is the size of the opcode that isn't. */ | |
869 | delta = (fragP->fr_subtype - opfixsize); | |
870 | ||
871 | tprintf (" -> opfixsize %d delta %d\n", opfixsize, delta); | |
872 | return delta; | |
873 | } | |
874 | ||
875 | /* Given the new addresses for this relax pass, figure out how big | |
876 | each opcode must be. We store the total number of bytes needed in | |
877 | fr_subtype. The return value is the difference between the size | |
878 | after the last pass and the size after this pass, so we use the old | |
879 | fr_subtype to calculate the difference. */ | |
880 | ||
881 | int | |
882 | rl78_relax_frag (segT segment ATTRIBUTE_UNUSED, fragS * fragP, long stretch) | |
883 | { | |
884 | addressT addr0, sym_addr; | |
885 | addressT mypc; | |
886 | int disp; | |
887 | int oldsize = fragP->fr_subtype; | |
888 | int newsize = oldsize; | |
889 | op_type_T optype; | |
890 | int ri; | |
891 | ||
892 | mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); | |
893 | ||
894 | /* If we ever get more than one reloc per opcode, this is the one | |
895 | we're relaxing. */ | |
896 | ri = 0; | |
897 | ||
898 | optype = rl78_opcode_type (fragP->fr_opcode); | |
899 | /* Try to get the target address. */ | |
900 | if (rl78_frag_fix_value (fragP, segment, ri, & addr0, | |
901 | fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH, | |
902 | & sym_addr)) | |
903 | { | |
904 | /* If we don't, we must use the maximum size for the linker. */ | |
905 | switch (fragP->tc_frag_data->relax[ri].type) | |
906 | { | |
907 | case RL78_RELAX_BRANCH: | |
908 | switch (optype) | |
909 | { | |
910 | case OT_bt: | |
911 | newsize = 6; | |
912 | break; | |
913 | case OT_bt_sfr: | |
914 | case OT_bt_es: | |
915 | newsize = 7; | |
916 | break; | |
917 | case OT_bc: | |
918 | newsize = 5; | |
919 | break; | |
920 | case OT_bh: | |
921 | newsize = 6; | |
922 | break; | |
923 | case OT_other: | |
924 | newsize = oldsize; | |
925 | break; | |
926 | } | |
927 | break; | |
928 | ||
929 | } | |
930 | fragP->fr_subtype = newsize; | |
931 | tprintf (" -> new %d old %d delta %d (external)\n", newsize, oldsize, newsize-oldsize); | |
932 | return newsize - oldsize; | |
933 | } | |
934 | ||
935 | if (sym_addr > mypc) | |
936 | addr0 += stretch; | |
937 | ||
938 | switch (fragP->tc_frag_data->relax[ri].type) | |
939 | { | |
940 | case RL78_RELAX_BRANCH: | |
941 | disp = (int) addr0 - (int) mypc; | |
942 | ||
943 | switch (optype) | |
944 | { | |
945 | case OT_bt: | |
946 | if (disp >= -128 && (disp - (oldsize-2)) <= 127) | |
947 | newsize = 3; | |
948 | else | |
949 | newsize = 6; | |
950 | break; | |
951 | case OT_bt_sfr: | |
952 | case OT_bt_es: | |
953 | if (disp >= -128 && (disp - (oldsize-3)) <= 127) | |
954 | newsize = 4; | |
955 | else | |
956 | newsize = 7; | |
957 | break; | |
958 | case OT_bc: | |
959 | if (disp >= -128 && (disp - (oldsize-1)) <= 127) | |
960 | newsize = 2; | |
961 | else | |
962 | newsize = 5; | |
963 | break; | |
964 | case OT_bh: | |
965 | if (disp >= -128 && (disp - (oldsize-2)) <= 127) | |
966 | newsize = 3; | |
967 | else | |
968 | newsize = 6; | |
969 | break; | |
970 | case OT_other: | |
971 | newsize = oldsize; | |
972 | break; | |
973 | } | |
974 | break; | |
975 | } | |
976 | ||
977 | /* This prevents infinite loops in align-heavy sources. */ | |
978 | if (newsize < oldsize) | |
979 | { | |
980 | if (fragP->tc_frag_data->times_shrank > 10 | |
981 | && fragP->tc_frag_data->times_grown > 10) | |
982 | newsize = oldsize; | |
983 | if (fragP->tc_frag_data->times_shrank < 20) | |
984 | fragP->tc_frag_data->times_shrank ++; | |
985 | } | |
986 | else if (newsize > oldsize) | |
987 | { | |
988 | if (fragP->tc_frag_data->times_grown < 20) | |
989 | fragP->tc_frag_data->times_grown ++; | |
990 | } | |
991 | ||
992 | fragP->fr_subtype = newsize; | |
993 | tprintf (" -> new %d old %d delta %d\n", newsize, oldsize, newsize-oldsize); | |
994 | return newsize - oldsize; | |
6ff71e76 NC |
995 | } |
996 | ||
0c315784 DD |
997 | /* This lets us test for the opcode type and the desired size in a |
998 | switch statement. */ | |
999 | #define OPCODE(type,size) ((type) * 16 + (size)) | |
1000 | ||
1001 | /* Given the opcode stored in fr_opcode and the number of bytes we | |
1002 | think we need, encode a new opcode. We stored a pointer to the | |
1003 | fixup for this opcode in the tc_frag_data structure. If we can do | |
1004 | the fixup here, we change the relocation type to "none" (we test | |
1005 | for that in tc_gen_reloc) else we change it to the right type for | |
1006 | the new (biggest) opcode. */ | |
1007 | ||
1008 | void | |
1009 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, | |
1010 | segT segment ATTRIBUTE_UNUSED, | |
1011 | fragS * fragP ATTRIBUTE_UNUSED) | |
1012 | { | |
1013 | rl78_bytesT * rl78b = fragP->tc_frag_data; | |
1014 | addressT addr0, mypc; | |
1015 | int disp; | |
1016 | int reloc_type, reloc_adjust; | |
1017 | char * op = fragP->fr_opcode; | |
1018 | int keep_reloc = 0; | |
1019 | int ri; | |
1020 | int fi = (rl78b->n_fixups > 1) ? 1 : 0; | |
1021 | fixS * fix = rl78b->fixups[fi].fixP; | |
1022 | ||
1023 | /* If we ever get more than one reloc per opcode, this is the one | |
1024 | we're relaxing. */ | |
1025 | ri = 0; | |
1026 | ||
1027 | /* We used a new frag for this opcode, so the opcode address should | |
1028 | be the frag address. */ | |
1029 | mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); | |
54f66250 | 1030 | tprintf ("\033[32mmypc: 0x%x\033[0m\n", (int)mypc); |
0c315784 DD |
1031 | |
1032 | /* Try to get the target address. If we fail here, we just use the | |
1033 | largest format. */ | |
1034 | if (rl78_frag_fix_value (fragP, segment, 0, & addr0, | |
54f66250 | 1035 | fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH, 0)) |
0c315784 DD |
1036 | { |
1037 | /* We don't know the target address. */ | |
1038 | keep_reloc = 1; | |
1039 | addr0 = 0; | |
1040 | disp = 0; | |
1041 | tprintf ("unknown addr ? - %x = ?\n", (int)mypc); | |
1042 | } | |
1043 | else | |
1044 | { | |
1045 | /* We know the target address, and it's in addr0. */ | |
1046 | disp = (int) addr0 - (int) mypc; | |
1047 | tprintf ("known addr %x - %x = %d\n", (int)addr0, (int)mypc, disp); | |
1048 | } | |
1049 | ||
1050 | if (linkrelax) | |
1051 | keep_reloc = 1; | |
1052 | ||
1053 | reloc_type = BFD_RELOC_NONE; | |
1054 | reloc_adjust = 0; | |
1055 | ||
1056 | switch (fragP->tc_frag_data->relax[ri].type) | |
1057 | { | |
1058 | case RL78_RELAX_BRANCH: | |
1059 | switch (OPCODE (rl78_opcode_type (fragP->fr_opcode), fragP->fr_subtype)) | |
1060 | { | |
1061 | ||
1062 | case OPCODE (OT_bt, 3): /* BT A,$ - no change. */ | |
1063 | disp -= 3; | |
1064 | op[2] = disp; | |
1065 | break; | |
1066 | ||
1067 | case OPCODE (OT_bt, 6): /* BT A,$ - long version. */ | |
1068 | disp -= 3; | |
1069 | op[1] ^= 0x06; /* toggle conditional. */ | |
1070 | op[2] = 3; /* displacement over long branch. */ | |
1071 | disp -= 3; | |
1072 | op[3] = 0xEE; /* BR $!addr20 */ | |
1073 | op[4] = disp & 0xff; | |
1074 | op[5] = disp >> 8; | |
1075 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1076 | reloc_adjust = 2; | |
1077 | break; | |
1078 | ||
1079 | case OPCODE (OT_bt_sfr, 4): /* BT PSW,$ - no change. */ | |
1080 | disp -= 4; | |
1081 | op[3] = disp; | |
1082 | break; | |
1083 | ||
1084 | case OPCODE (OT_bt_sfr, 7): /* BT PSW,$ - long version. */ | |
1085 | disp -= 4; | |
1086 | op[1] ^= 0x06; /* toggle conditional. */ | |
1087 | op[3] = 3; /* displacement over long branch. */ | |
1088 | disp -= 3; | |
1089 | op[4] = 0xEE; /* BR $!addr20 */ | |
1090 | op[5] = disp & 0xff; | |
1091 | op[6] = disp >> 8; | |
1092 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1093 | reloc_adjust = 2; | |
1094 | break; | |
1095 | ||
1096 | case OPCODE (OT_bt_es, 4): /* BT ES:[HL],$ - no change. */ | |
1097 | disp -= 4; | |
1098 | op[3] = disp; | |
1099 | break; | |
1100 | ||
1101 | case OPCODE (OT_bt_es, 7): /* BT PSW,$ - long version. */ | |
1102 | disp -= 4; | |
1103 | op[2] ^= 0x06; /* toggle conditional. */ | |
1104 | op[3] = 3; /* displacement over long branch. */ | |
1105 | disp -= 3; | |
1106 | op[4] = 0xEE; /* BR $!addr20 */ | |
1107 | op[5] = disp & 0xff; | |
1108 | op[6] = disp >> 8; | |
1109 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1110 | reloc_adjust = 2; | |
1111 | break; | |
1112 | ||
1113 | case OPCODE (OT_bc, 2): /* BC $ - no change. */ | |
1114 | disp -= 2; | |
1115 | op[1] = disp; | |
1116 | break; | |
1117 | ||
1118 | case OPCODE (OT_bc, 5): /* BC $ - long version. */ | |
1119 | disp -= 2; | |
1120 | op[0] ^= 0x02; /* toggle conditional. */ | |
1121 | op[1] = 3; | |
1122 | disp -= 3; | |
1123 | op[2] = 0xEE; /* BR $!addr20 */ | |
1124 | op[3] = disp & 0xff; | |
1125 | op[4] = disp >> 8; | |
1126 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1127 | reloc_adjust = 2; | |
1128 | break; | |
1129 | ||
1130 | case OPCODE (OT_bh, 3): /* BH $ - no change. */ | |
1131 | disp -= 3; | |
1132 | op[2] = disp; | |
1133 | break; | |
1134 | ||
1135 | case OPCODE (OT_bh, 6): /* BC $ - long version. */ | |
1136 | disp -= 3; | |
1137 | op[1] ^= 0x10; /* toggle conditional. */ | |
1138 | op[2] = 3; | |
1139 | disp -= 3; | |
1140 | op[3] = 0xEE; /* BR $!addr20 */ | |
1141 | op[4] = disp & 0xff; | |
1142 | op[5] = disp >> 8; | |
1143 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1144 | reloc_adjust = 2; | |
1145 | break; | |
1146 | ||
1147 | default: | |
1148 | fprintf(stderr, "Missed case %d %d at 0x%lx\n", | |
1149 | rl78_opcode_type (fragP->fr_opcode), fragP->fr_subtype, mypc); | |
1150 | abort (); | |
3739860c | 1151 | |
0c315784 DD |
1152 | } |
1153 | break; | |
1154 | ||
1155 | default: | |
1156 | if (rl78b->n_fixups) | |
1157 | { | |
1158 | reloc_type = fix->fx_r_type; | |
1159 | reloc_adjust = 0; | |
1160 | } | |
1161 | break; | |
1162 | } | |
1163 | ||
1164 | if (rl78b->n_fixups) | |
1165 | { | |
1166 | ||
1167 | fix->fx_r_type = reloc_type; | |
1168 | fix->fx_where += reloc_adjust; | |
1169 | switch (reloc_type) | |
1170 | { | |
1171 | case BFD_RELOC_NONE: | |
1172 | fix->fx_size = 0; | |
1173 | break; | |
1174 | case BFD_RELOC_8: | |
1175 | fix->fx_size = 1; | |
1176 | break; | |
1177 | case BFD_RELOC_16_PCREL: | |
1178 | fix->fx_size = 2; | |
1179 | break; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | fragP->fr_fix = fragP->fr_subtype + (fragP->fr_opcode - fragP->fr_literal); | |
1184 | tprintf ("fragP->fr_fix now %ld (%d + (%p - %p)\n", (long) fragP->fr_fix, | |
1185 | fragP->fr_subtype, fragP->fr_opcode, fragP->fr_literal); | |
1186 | fragP->fr_var = 0; | |
1187 | ||
1188 | tprintf ("compare 0x%lx vs 0x%lx - 0x%lx = 0x%lx (%p)\n", | |
1189 | (long)fragP->fr_fix, | |
1190 | (long)fragP->fr_next->fr_address, (long)fragP->fr_address, | |
1191 | (long)(fragP->fr_next->fr_address - fragP->fr_address), | |
1192 | fragP->fr_next); | |
1193 | ||
1194 | if (fragP->fr_next != NULL | |
1195 | && ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) | |
1196 | != fragP->fr_fix)) | |
1197 | as_bad (_("bad frag at %p : fix %ld addr %ld %ld \n"), fragP, | |
1198 | (long) fragP->fr_fix, | |
1199 | (long) fragP->fr_address, (long) fragP->fr_next->fr_address); | |
99c513f6 | 1200 | } |
9cea966c | 1201 | |
0c315784 DD |
1202 | /* End of relaxation code. |
1203 | ----------------------------------------------------------------------*/ | |
1204 | \f | |
1205 | ||
99c513f6 DD |
1206 | arelent ** |
1207 | tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp) | |
1208 | { | |
1209 | static arelent * reloc[8]; | |
1210 | int rp; | |
99c513f6 DD |
1211 | |
1212 | if (fixp->fx_r_type == BFD_RELOC_NONE) | |
1213 | { | |
1214 | reloc[0] = NULL; | |
1215 | return reloc; | |
1216 | } | |
1217 | ||
1218 | if (fixp->fx_subsy | |
1219 | && S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
1220 | { | |
1221 | fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy); | |
1222 | fixp->fx_subsy = NULL; | |
1223 | } | |
1224 | ||
1225 | reloc[0] = (arelent *) xmalloc (sizeof (arelent)); | |
1226 | reloc[0]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
1227 | * reloc[0]->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
1228 | reloc[0]->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1229 | reloc[0]->addend = fixp->fx_offset; | |
1230 | ||
1231 | if (fixp->fx_r_type == BFD_RELOC_RL78_32_OP | |
1232 | && fixp->fx_subsy) | |
1233 | { | |
1234 | fixp->fx_r_type = BFD_RELOC_RL78_DIFF; | |
99c513f6 DD |
1235 | } |
1236 | ||
1237 | #define OPX(REL,SYM,ADD) \ | |
1238 | reloc[rp] = (arelent *) xmalloc (sizeof (arelent)); \ | |
1239 | reloc[rp]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); \ | |
1240 | reloc[rp]->howto = bfd_reloc_type_lookup (stdoutput, REL); \ | |
1241 | reloc[rp]->addend = ADD; \ | |
1242 | * reloc[rp]->sym_ptr_ptr = SYM; \ | |
1243 | reloc[rp]->address = fixp->fx_frag->fr_address + fixp->fx_where; \ | |
1244 | reloc[++rp] = NULL | |
1245 | #define OPSYM(SYM) OPX(BFD_RELOC_RL78_SYM, SYM, 0) | |
aff1a65e NC |
1246 | |
1247 | /* FIXME: We cannot do the normal thing for an immediate value reloc, | |
1248 | ie creating a RL78_SYM reloc in the *ABS* section with an offset | |
1249 | equal to the immediate value we want to store. This fails because | |
1250 | the reloc processing in bfd_perform_relocation and bfd_install_relocation | |
1251 | will short circuit such relocs and never pass them on to the special | |
1252 | reloc processing code. So instead we create a RL78_SYM reloc against | |
1253 | the __rl78_abs__ symbol and arrange for the linker scripts to place | |
1254 | this symbol at address 0. */ | |
1255 | #define OPIMM(IMM) OPX (BFD_RELOC_RL78_SYM, symbol_get_bfdsym (rl78_abs_sym), IMM) | |
3739860c | 1256 | |
99c513f6 DD |
1257 | #define OP(OP) OPX(BFD_RELOC_RL78_##OP, *reloc[0]->sym_ptr_ptr, 0) |
1258 | #define SYM0() reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_SYM) | |
1259 | ||
1260 | rp = 1; | |
1261 | ||
1262 | /* Certain BFD relocations cannot be translated directly into | |
1263 | a single (non-Red Hat) RL78 relocation, but instead need | |
1264 | multiple RL78 relocations - handle them here. */ | |
1265 | switch (fixp->fx_r_type) | |
1266 | { | |
1267 | case BFD_RELOC_RL78_DIFF: | |
1268 | SYM0 (); | |
1269 | OPSYM (symbol_get_bfdsym (fixp->fx_subsy)); | |
1270 | OP(OP_SUBTRACT); | |
1271 | ||
1272 | switch (fixp->fx_size) | |
1273 | { | |
1274 | case 1: | |
1275 | OP(ABS8); | |
1276 | break; | |
1277 | case 2: | |
1278 | OP (ABS16); | |
1279 | break; | |
1280 | case 4: | |
1281 | OP (ABS32); | |
1282 | break; | |
1283 | } | |
1284 | break; | |
1285 | ||
1286 | case BFD_RELOC_RL78_NEG32: | |
1287 | SYM0 (); | |
1288 | OP (OP_NEG); | |
1289 | OP (ABS32); | |
1290 | break; | |
1291 | ||
4107ae22 | 1292 | case BFD_RELOC_RL78_CODE: |
b3fe4307 NC |
1293 | reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_16U); |
1294 | reloc[1] = NULL; | |
4107ae22 DD |
1295 | break; |
1296 | ||
99c513f6 DD |
1297 | case BFD_RELOC_RL78_LO16: |
1298 | SYM0 (); | |
1299 | OPIMM (0xffff); | |
1300 | OP (OP_AND); | |
1301 | OP (ABS16); | |
1302 | break; | |
1303 | ||
1304 | case BFD_RELOC_RL78_HI16: | |
1305 | SYM0 (); | |
1306 | OPIMM (16); | |
1307 | OP (OP_SHRA); | |
1308 | OP (ABS16); | |
1309 | break; | |
1310 | ||
1311 | case BFD_RELOC_RL78_HI8: | |
1312 | SYM0 (); | |
1313 | OPIMM (16); | |
1314 | OP (OP_SHRA); | |
1315 | OPIMM (0xff); | |
1316 | OP (OP_AND); | |
1317 | OP (ABS8); | |
1318 | break; | |
1319 | ||
1320 | default: | |
1321 | reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
1322 | reloc[1] = NULL; | |
1323 | break; | |
1324 | } | |
1325 | ||
1326 | return reloc; | |
1327 | } | |
1328 | ||
1329 | int | |
1330 | rl78_validate_fix_sub (struct fix * f) | |
1331 | { | |
1332 | /* We permit the subtraction of two symbols in a few cases. */ | |
1333 | /* mov #sym1-sym2, R3 */ | |
1334 | if (f->fx_r_type == BFD_RELOC_RL78_32_OP) | |
1335 | return 1; | |
1336 | /* .long sym1-sym2 */ | |
1337 | if (f->fx_r_type == BFD_RELOC_RL78_DIFF | |
1338 | && ! f->fx_pcrel | |
1339 | && (f->fx_size == 4 || f->fx_size == 2 || f->fx_size == 1)) | |
1340 | return 1; | |
1341 | return 0; | |
1342 | } | |
1343 | ||
1344 | long | |
1345 | md_pcrel_from_section (fixS * fixP, segT sec) | |
1346 | { | |
1347 | long rv; | |
1348 | ||
1349 | if (fixP->fx_addsy != NULL | |
1350 | && (! S_IS_DEFINED (fixP->fx_addsy) | |
1351 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) | |
1352 | /* The symbol is undefined (or is defined but not in this section). | |
1353 | Let the linker figure it out. */ | |
1354 | return 0; | |
1355 | ||
1356 | rv = fixP->fx_frag->fr_address + fixP->fx_where; | |
1357 | switch (fixP->fx_r_type) | |
1358 | { | |
1359 | case BFD_RELOC_8_PCREL: | |
1360 | rv += 1; | |
1361 | break; | |
1362 | case BFD_RELOC_16_PCREL: | |
1363 | rv += 2; | |
1364 | break; | |
1365 | default: | |
1366 | break; | |
1367 | } | |
1368 | return rv; | |
1369 | } | |
1370 | ||
1371 | void | |
1372 | md_apply_fix (struct fix * f ATTRIBUTE_UNUSED, | |
1373 | valueT * t ATTRIBUTE_UNUSED, | |
1374 | segT s ATTRIBUTE_UNUSED) | |
1375 | { | |
1376 | char * op; | |
1377 | unsigned long val; | |
1378 | ||
1379 | if (f->fx_addsy && S_FORCE_RELOC (f->fx_addsy, 1)) | |
1380 | return; | |
1381 | if (f->fx_subsy && S_FORCE_RELOC (f->fx_subsy, 1)) | |
1382 | return; | |
1383 | ||
1384 | op = f->fx_frag->fr_literal + f->fx_where; | |
1385 | val = (unsigned long) * t; | |
1386 | ||
1387 | switch (f->fx_r_type) | |
1388 | { | |
1389 | case BFD_RELOC_NONE: | |
1390 | break; | |
1391 | ||
9cea966c DD |
1392 | case BFD_RELOC_RL78_RELAX: |
1393 | f->fx_done = 1; | |
1394 | break; | |
1395 | ||
99c513f6 | 1396 | case BFD_RELOC_8_PCREL: |
0a899fd5 DD |
1397 | if ((long)val < -128 || (long)val > 127) |
1398 | as_bad_where (f->fx_file, f->fx_line, | |
1399 | _("value of %ld too large for 8-bit branch"), | |
1400 | val); | |
1401 | /* Fall through. */ | |
1402 | case BFD_RELOC_8: | |
54f66250 | 1403 | case BFD_RELOC_RL78_SADDR: /* We need to store the 8 LSB, but this works. */ |
99c513f6 DD |
1404 | op[0] = val; |
1405 | break; | |
1406 | ||
99c513f6 | 1407 | case BFD_RELOC_16_PCREL: |
0a899fd5 DD |
1408 | if ((long)val < -32768 || (long)val > 32767) |
1409 | as_bad_where (f->fx_file, f->fx_line, | |
1410 | _("value of %ld too large for 16-bit branch"), | |
1411 | val); | |
1412 | /* Fall through. */ | |
1413 | case BFD_RELOC_16: | |
4107ae22 | 1414 | case BFD_RELOC_RL78_CODE: |
99c513f6 DD |
1415 | op[0] = val; |
1416 | op[1] = val >> 8; | |
1417 | break; | |
1418 | ||
1419 | case BFD_RELOC_24: | |
1420 | op[0] = val; | |
1421 | op[1] = val >> 8; | |
1422 | op[2] = val >> 16; | |
1423 | break; | |
1424 | ||
1425 | case BFD_RELOC_32: | |
99c513f6 DD |
1426 | op[0] = val; |
1427 | op[1] = val >> 8; | |
1428 | op[2] = val >> 16; | |
1429 | op[3] = val >> 24; | |
1430 | break; | |
1431 | ||
3ce3a066 NC |
1432 | case BFD_RELOC_RL78_DIFF: |
1433 | op[0] = val; | |
1434 | if (f->fx_size > 1) | |
1435 | op[1] = val >> 8; | |
1436 | if (f->fx_size > 2) | |
1437 | op[2] = val >> 16; | |
1438 | if (f->fx_size > 3) | |
1439 | op[3] = val >> 24; | |
1440 | break; | |
1441 | ||
b3fe4307 NC |
1442 | case BFD_RELOC_RL78_HI8: |
1443 | val = val >> 16; | |
1444 | op[0] = val; | |
1445 | break; | |
1446 | ||
1447 | case BFD_RELOC_RL78_HI16: | |
1448 | val = val >> 16; | |
1449 | op[0] = val; | |
1450 | op[1] = val >> 8; | |
1451 | break; | |
1452 | ||
1453 | case BFD_RELOC_RL78_LO16: | |
1454 | op[0] = val; | |
1455 | op[1] = val >> 8; | |
1456 | break; | |
1457 | ||
99c513f6 DD |
1458 | default: |
1459 | as_bad (_("Unknown reloc in md_apply_fix: %s"), | |
1460 | bfd_get_reloc_code_name (f->fx_r_type)); | |
1461 | break; | |
1462 | } | |
1463 | ||
1464 | if (f->fx_addsy == NULL) | |
1465 | f->fx_done = 1; | |
1466 | } | |
1467 | ||
1468 | valueT | |
1469 | md_section_align (segT segment, valueT size) | |
1470 | { | |
1471 | int align = bfd_get_section_alignment (stdoutput, segment); | |
1472 | return ((size + (1 << align) - 1) & (-1 << align)); | |
1473 | } |