Commit | Line | Data |
---|---|---|
99c513f6 | 1 | /* tc-rl78.c -- Assembler for the Renesas RL78 |
6f2750fe | 2 | Copyright (C) 2011-2016 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 | { | |
e896287c | 105 | rl78_relax (RL78_RELAX_BRANCH, 0); |
9cea966c DD |
106 | rl78_bytes.link_relax |= RL78_RELAXA_BRA; |
107 | } | |
108 | ||
99c513f6 DD |
109 | static void |
110 | rl78_fixup (expressionS exp, int offsetbits, int nbits, int type) | |
111 | { | |
112 | rl78_bytes.fixups[rl78_bytes.n_fixups].exp = exp; | |
113 | rl78_bytes.fixups[rl78_bytes.n_fixups].offset = offsetbits; | |
114 | rl78_bytes.fixups[rl78_bytes.n_fixups].nbits = nbits; | |
115 | rl78_bytes.fixups[rl78_bytes.n_fixups].type = type; | |
116 | rl78_bytes.fixups[rl78_bytes.n_fixups].reloc = exp.X_md; | |
117 | rl78_bytes.n_fixups ++; | |
118 | } | |
119 | ||
120 | #define rl78_field_fixup(exp, offset, nbits, type) \ | |
121 | rl78_fixup (exp, offset + 8 * rl78_bytes.n_prefix), nbits, type) | |
122 | ||
123 | #define rl78_op_fixup(exp, offset, nbits, type) \ | |
124 | rl78_fixup (exp, offset + 8 * (rl78_bytes.n_prefix + rl78_bytes.n_base), nbits, type) | |
125 | ||
126 | void | |
127 | rl78_prefix (int p) | |
128 | { | |
129 | rl78_bytes.prefix[0] = p; | |
130 | rl78_bytes.n_prefix = 1; | |
131 | } | |
132 | ||
133 | int | |
134 | rl78_has_prefix () | |
135 | { | |
136 | return rl78_bytes.n_prefix; | |
137 | } | |
138 | ||
139 | void | |
140 | rl78_base1 (int b1) | |
141 | { | |
142 | rl78_bytes.base[0] = b1; | |
143 | rl78_bytes.n_base = 1; | |
144 | } | |
145 | ||
146 | void | |
147 | rl78_base2 (int b1, int b2) | |
148 | { | |
149 | rl78_bytes.base[0] = b1; | |
150 | rl78_bytes.base[1] = b2; | |
151 | rl78_bytes.n_base = 2; | |
152 | } | |
153 | ||
154 | void | |
155 | rl78_base3 (int b1, int b2, int b3) | |
156 | { | |
157 | rl78_bytes.base[0] = b1; | |
158 | rl78_bytes.base[1] = b2; | |
159 | rl78_bytes.base[2] = b3; | |
160 | rl78_bytes.n_base = 3; | |
161 | } | |
162 | ||
163 | void | |
164 | rl78_base4 (int b1, int b2, int b3, int b4) | |
165 | { | |
166 | rl78_bytes.base[0] = b1; | |
167 | rl78_bytes.base[1] = b2; | |
168 | rl78_bytes.base[2] = b3; | |
169 | rl78_bytes.base[3] = b4; | |
170 | rl78_bytes.n_base = 4; | |
171 | } | |
172 | ||
173 | #define F_PRECISION 2 | |
174 | ||
175 | void | |
176 | rl78_op (expressionS exp, int nbytes, int type) | |
177 | { | |
178 | int v = 0; | |
179 | ||
180 | if ((exp.X_op == O_constant || exp.X_op == O_big) | |
181 | && type != RL78REL_PCREL) | |
182 | { | |
183 | if (exp.X_op == O_big && exp.X_add_number <= 0) | |
184 | { | |
185 | LITTLENUM_TYPE w[2]; | |
186 | char * ip = rl78_bytes.ops + rl78_bytes.n_ops; | |
187 | ||
188 | gen_to_words (w, F_PRECISION, 8); | |
189 | ip[3] = w[0] >> 8; | |
190 | ip[2] = w[0]; | |
191 | ip[1] = w[1] >> 8; | |
192 | ip[0] = w[1]; | |
193 | rl78_bytes.n_ops += 4; | |
194 | } | |
195 | else | |
196 | { | |
197 | v = exp.X_add_number; | |
198 | while (nbytes) | |
199 | { | |
200 | rl78_bytes.ops[rl78_bytes.n_ops++] =v & 0xff; | |
201 | v >>= 8; | |
202 | nbytes --; | |
203 | } | |
204 | } | |
205 | } | |
206 | else | |
207 | { | |
4107ae22 DD |
208 | if (nbytes > 2 |
209 | && exp.X_md == BFD_RELOC_RL78_CODE) | |
210 | exp.X_md = 0; | |
b3fe4307 NC |
211 | |
212 | if (nbytes == 1 | |
213 | && (exp.X_md == BFD_RELOC_RL78_LO16 | |
214 | || exp.X_md == BFD_RELOC_RL78_HI16)) | |
215 | as_bad (_("16-bit relocation used in 8-bit operand")); | |
216 | ||
217 | if (nbytes == 2 | |
218 | && exp.X_md == BFD_RELOC_RL78_HI8) | |
219 | as_bad (_("8-bit relocation used in 16-bit operand")); | |
220 | ||
99c513f6 DD |
221 | rl78_op_fixup (exp, rl78_bytes.n_ops * 8, nbytes * 8, type); |
222 | memset (rl78_bytes.ops + rl78_bytes.n_ops, 0, nbytes); | |
223 | rl78_bytes.n_ops += nbytes; | |
224 | } | |
225 | } | |
226 | ||
227 | /* This gets complicated when the field spans bytes, because fields | |
228 | are numbered from the MSB of the first byte as zero, and bits are | |
229 | stored LSB towards the LSB of the byte. Thus, a simple four-bit | |
230 | insertion of 12 at position 4 of 0x00 yields: 0x0b. A three-bit | |
231 | insertion of b'MXL at position 7 is like this: | |
232 | ||
233 | - - - - - - - - - - - - - - - - | |
234 | M X L */ | |
235 | ||
236 | void | |
237 | rl78_field (int val, int pos, int sz) | |
238 | { | |
239 | int valm; | |
240 | int bytep, bitp; | |
241 | ||
242 | if (sz > 0) | |
243 | { | |
244 | if (val < 0 || val >= (1 << sz)) | |
245 | as_bad (_("Value %d doesn't fit in unsigned %d-bit field"), val, sz); | |
246 | } | |
247 | else | |
248 | { | |
249 | sz = - sz; | |
250 | if (val < -(1 << (sz - 1)) || val >= (1 << (sz - 1))) | |
251 | as_bad (_("Value %d doesn't fit in signed %d-bit field"), val, sz); | |
252 | } | |
253 | ||
254 | /* This code points at 'M' in the above example. */ | |
255 | bytep = pos / 8; | |
256 | bitp = pos % 8; | |
257 | ||
258 | while (bitp + sz > 8) | |
259 | { | |
260 | int ssz = 8 - bitp; | |
261 | int svalm; | |
262 | ||
263 | svalm = val >> (sz - ssz); | |
264 | svalm = svalm & ((1 << ssz) - 1); | |
265 | svalm = svalm << (8 - bitp - ssz); | |
266 | gas_assert (bytep < rl78_bytes.n_base); | |
267 | rl78_bytes.base[bytep] |= svalm; | |
268 | ||
269 | bitp = 0; | |
270 | sz -= ssz; | |
271 | bytep ++; | |
272 | } | |
273 | valm = val & ((1 << sz) - 1); | |
274 | valm = valm << (8 - bitp - sz); | |
275 | gas_assert (bytep < rl78_bytes.n_base); | |
276 | rl78_bytes.base[bytep] |= valm; | |
277 | } | |
278 | ||
279 | /*------------------------------------------------------------------*/ | |
280 | ||
9cea966c DD |
281 | enum options |
282 | { | |
283 | OPTION_RELAX = OPTION_MD_BASE, | |
e896287c | 284 | OPTION_NORELAX, |
4046d87a | 285 | OPTION_G10, |
1740ba0c NC |
286 | OPTION_G13, |
287 | OPTION_G14, | |
856ea05c KP |
288 | OPTION_32BIT_DOUBLES, |
289 | OPTION_64BIT_DOUBLES, | |
9cea966c DD |
290 | }; |
291 | ||
99c513f6 DD |
292 | #define RL78_SHORTOPTS "" |
293 | const char * md_shortopts = RL78_SHORTOPTS; | |
294 | ||
295 | /* Assembler options. */ | |
296 | struct option md_longopts[] = | |
297 | { | |
9cea966c | 298 | {"relax", no_argument, NULL, OPTION_RELAX}, |
e896287c | 299 | {"norelax", no_argument, NULL, OPTION_NORELAX}, |
4046d87a | 300 | {"mg10", no_argument, NULL, OPTION_G10}, |
1740ba0c NC |
301 | {"mg13", no_argument, NULL, OPTION_G13}, |
302 | {"mg14", no_argument, NULL, OPTION_G14}, | |
303 | {"mrl78", no_argument, NULL, OPTION_G14}, | |
856ea05c KP |
304 | {"m32bit-doubles", no_argument, NULL, OPTION_32BIT_DOUBLES}, |
305 | {"m64bit-doubles", no_argument, NULL, OPTION_64BIT_DOUBLES}, | |
99c513f6 DD |
306 | {NULL, no_argument, NULL, 0} |
307 | }; | |
308 | size_t md_longopts_size = sizeof (md_longopts); | |
309 | ||
310 | int | |
17b9d67d | 311 | md_parse_option (int c, const char * arg ATTRIBUTE_UNUSED) |
99c513f6 | 312 | { |
9cea966c DD |
313 | switch (c) |
314 | { | |
315 | case OPTION_RELAX: | |
316 | linkrelax = 1; | |
317 | return 1; | |
e896287c DD |
318 | case OPTION_NORELAX: |
319 | linkrelax = 0; | |
320 | return 1; | |
9cea966c | 321 | |
4046d87a | 322 | case OPTION_G10: |
1740ba0c | 323 | elf_flags &= ~ E_FLAG_RL78_CPU_MASK; |
4046d87a NC |
324 | elf_flags |= E_FLAG_RL78_G10; |
325 | return 1; | |
856ea05c | 326 | |
1740ba0c NC |
327 | case OPTION_G13: |
328 | elf_flags &= ~ E_FLAG_RL78_CPU_MASK; | |
329 | elf_flags |= E_FLAG_RL78_G13; | |
330 | return 1; | |
331 | ||
332 | case OPTION_G14: | |
333 | elf_flags &= ~ E_FLAG_RL78_CPU_MASK; | |
334 | elf_flags |= E_FLAG_RL78_G14; | |
335 | return 1; | |
336 | ||
856ea05c KP |
337 | case OPTION_32BIT_DOUBLES: |
338 | elf_flags &= ~ E_FLAG_RL78_64BIT_DOUBLES; | |
339 | return 1; | |
340 | ||
341 | case OPTION_64BIT_DOUBLES: | |
342 | elf_flags |= E_FLAG_RL78_64BIT_DOUBLES; | |
343 | return 1; | |
9cea966c | 344 | } |
99c513f6 DD |
345 | return 0; |
346 | } | |
347 | ||
0952813b DD |
348 | int |
349 | rl78_isa_g10 (void) | |
350 | { | |
351 | return (elf_flags & E_FLAG_RL78_CPU_MASK) == E_FLAG_RL78_G10; | |
352 | } | |
353 | ||
354 | int | |
355 | rl78_isa_g13 (void) | |
356 | { | |
357 | return (elf_flags & E_FLAG_RL78_CPU_MASK) == E_FLAG_RL78_G13; | |
358 | } | |
359 | ||
360 | int | |
361 | rl78_isa_g14 (void) | |
362 | { | |
363 | return (elf_flags & E_FLAG_RL78_CPU_MASK) == E_FLAG_RL78_G14; | |
364 | } | |
365 | ||
99c513f6 | 366 | void |
6ff71e76 | 367 | md_show_usage (FILE * stream) |
99c513f6 | 368 | { |
856ea05c | 369 | fprintf (stream, _(" RL78 specific command line options:\n")); |
6ff71e76 | 370 | fprintf (stream, _(" --mrelax Enable link time relaxation\n")); |
856ea05c | 371 | fprintf (stream, _(" --mg10 Enable support for G10 variant\n")); |
1740ba0c NC |
372 | fprintf (stream, _(" --mg13 Selects the G13 core.\n")); |
373 | fprintf (stream, _(" --mg14 Selects the G14 core [default]\n")); | |
374 | fprintf (stream, _(" --mrl78 Alias for --mg14\n")); | |
856ea05c | 375 | fprintf (stream, _(" --m32bit-doubles [default]\n")); |
6ff71e76 | 376 | fprintf (stream, _(" --m64bit-doubles Source code uses 64-bit doubles\n")); |
99c513f6 DD |
377 | } |
378 | ||
99c513f6 DD |
379 | static void |
380 | s_bss (int ignore ATTRIBUTE_UNUSED) | |
381 | { | |
382 | int temp; | |
383 | ||
384 | temp = get_absolute_expression (); | |
385 | subseg_set (bss_section, (subsegT) temp); | |
386 | demand_empty_rest_of_line (); | |
387 | } | |
388 | ||
856ea05c KP |
389 | static void |
390 | rl78_float_cons (int ignore ATTRIBUTE_UNUSED) | |
391 | { | |
392 | if (elf_flags & E_FLAG_RL78_64BIT_DOUBLES) | |
393 | return float_cons ('d'); | |
394 | return float_cons ('f'); | |
395 | } | |
396 | ||
99c513f6 DD |
397 | /* The target specific pseudo-ops which we support. */ |
398 | const pseudo_typeS md_pseudo_table[] = | |
399 | { | |
856ea05c KP |
400 | /* Our "standard" pseudos. */ |
401 | { "double", rl78_float_cons, 'd' }, | |
402 | { "bss", s_bss, 0 }, | |
403 | { "3byte", cons, 3 }, | |
404 | { "int", cons, 4 }, | |
405 | { "word", cons, 4 }, | |
99c513f6 DD |
406 | |
407 | /* End of list marker. */ | |
408 | { NULL, NULL, 0 } | |
409 | }; | |
410 | ||
aff1a65e NC |
411 | static symbolS * rl78_abs_sym = NULL; |
412 | ||
99c513f6 DD |
413 | void |
414 | md_begin (void) | |
415 | { | |
aff1a65e | 416 | rl78_abs_sym = symbol_make ("__rl78_abs__"); |
99c513f6 DD |
417 | } |
418 | ||
419 | void | |
420 | rl78_md_end (void) | |
421 | { | |
422 | } | |
423 | ||
4046d87a NC |
424 | /* Set the ELF specific flags. */ |
425 | void | |
426 | rl78_elf_final_processing (void) | |
427 | { | |
428 | elf_elfheader (stdoutput)->e_flags |= elf_flags; | |
429 | } | |
430 | ||
99c513f6 DD |
431 | /* Write a value out to the object file, using the appropriate endianness. */ |
432 | void | |
433 | md_number_to_chars (char * buf, valueT val, int n) | |
434 | { | |
435 | number_to_chars_littleendian (buf, val, n); | |
436 | } | |
437 | ||
c9d66558 | 438 | static void |
e0471c16 | 439 | require_end_of_expr (const char *fname) |
c9d66558 DD |
440 | { |
441 | while (* input_line_pointer == ' ' | |
442 | || * input_line_pointer == '\t') | |
443 | input_line_pointer ++; | |
444 | ||
445 | if (! * input_line_pointer | |
446 | || strchr ("\n\r,", * input_line_pointer) | |
447 | || strchr (comment_chars, * input_line_pointer) | |
448 | || strchr (line_comment_chars, * input_line_pointer) | |
449 | || strchr (line_separator_chars, * input_line_pointer)) | |
450 | return; | |
451 | ||
452 | as_bad (_("%%%s() must be outermost term in expression"), fname); | |
453 | } | |
454 | ||
99c513f6 DD |
455 | static struct |
456 | { | |
e0471c16 | 457 | const char * fname; |
99c513f6 DD |
458 | int reloc; |
459 | } | |
460 | reloc_functions[] = | |
461 | { | |
4107ae22 | 462 | { "code", BFD_RELOC_RL78_CODE }, |
99c513f6 DD |
463 | { "lo16", BFD_RELOC_RL78_LO16 }, |
464 | { "hi16", BFD_RELOC_RL78_HI16 }, | |
465 | { "hi8", BFD_RELOC_RL78_HI8 }, | |
466 | { 0, 0 } | |
467 | }; | |
468 | ||
469 | void | |
470 | md_operand (expressionS * exp ATTRIBUTE_UNUSED) | |
471 | { | |
472 | int reloc = 0; | |
473 | int i; | |
474 | ||
475 | for (i = 0; reloc_functions[i].fname; i++) | |
476 | { | |
477 | int flen = strlen (reloc_functions[i].fname); | |
478 | ||
479 | if (input_line_pointer[0] == '%' | |
480 | && strncasecmp (input_line_pointer + 1, reloc_functions[i].fname, flen) == 0 | |
481 | && input_line_pointer[flen + 1] == '(') | |
482 | { | |
483 | reloc = reloc_functions[i].reloc; | |
484 | input_line_pointer += flen + 2; | |
485 | break; | |
486 | } | |
487 | } | |
488 | if (reloc == 0) | |
489 | return; | |
490 | ||
491 | expression (exp); | |
492 | if (* input_line_pointer == ')') | |
493 | input_line_pointer ++; | |
494 | ||
495 | exp->X_md = reloc; | |
c9d66558 DD |
496 | |
497 | require_end_of_expr (reloc_functions[i].fname); | |
99c513f6 DD |
498 | } |
499 | ||
500 | void | |
501 | rl78_frag_init (fragS * fragP) | |
502 | { | |
9cea966c DD |
503 | if (rl78_bytes.n_relax || rl78_bytes.link_relax) |
504 | { | |
505 | fragP->tc_frag_data = malloc (sizeof (rl78_bytesT)); | |
506 | memcpy (fragP->tc_frag_data, & rl78_bytes, sizeof (rl78_bytesT)); | |
507 | } | |
508 | else | |
509 | fragP->tc_frag_data = 0; | |
510 | } | |
511 | ||
512 | /* When relaxing, we need to output a reloc for any .align directive | |
513 | so that we can retain this alignment as we adjust opcode sizes. */ | |
514 | void | |
515 | rl78_handle_align (fragS * frag) | |
516 | { | |
517 | if (linkrelax | |
518 | && (frag->fr_type == rs_align | |
519 | || frag->fr_type == rs_align_code) | |
520 | && frag->fr_address + frag->fr_fix > 0 | |
521 | && frag->fr_offset > 0 | |
522 | && now_seg != bss_section) | |
523 | { | |
524 | fix_new (frag, frag->fr_fix, 0, | |
525 | &abs_symbol, RL78_RELAXA_ALIGN + frag->fr_offset, | |
526 | 0, BFD_RELOC_RL78_RELAX); | |
527 | /* For the purposes of relaxation, this relocation is attached | |
528 | to the byte *after* the alignment - i.e. the byte that must | |
529 | remain aligned. */ | |
530 | fix_new (frag->fr_next, 0, 0, | |
531 | &abs_symbol, RL78_RELAXA_ELIGN + frag->fr_offset, | |
532 | 0, BFD_RELOC_RL78_RELAX); | |
533 | } | |
99c513f6 DD |
534 | } |
535 | ||
6d4af3c2 | 536 | const char * |
99c513f6 DD |
537 | md_atof (int type, char * litP, int * sizeP) |
538 | { | |
539 | return ieee_md_atof (type, litP, sizeP, target_big_endian); | |
540 | } | |
541 | ||
542 | symbolS * | |
543 | md_undefined_symbol (char * name ATTRIBUTE_UNUSED) | |
544 | { | |
545 | return NULL; | |
546 | } | |
547 | ||
548 | #define APPEND(B, N_B) \ | |
549 | if (rl78_bytes.N_B) \ | |
550 | { \ | |
551 | memcpy (bytes + idx, rl78_bytes.B, rl78_bytes.N_B); \ | |
552 | idx += rl78_bytes.N_B; \ | |
553 | } | |
554 | ||
555 | ||
556 | void | |
557 | md_assemble (char * str) | |
558 | { | |
559 | char * bytes; | |
560 | fragS * frag_then = frag_now; | |
561 | int idx = 0; | |
562 | int i; | |
563 | int rel; | |
564 | expressionS *exp; | |
565 | ||
566 | /*printf("\033[32mASM: %s\033[0m\n", str);*/ | |
567 | ||
568 | dwarf2_emit_insn (0); | |
569 | ||
570 | memset (& rl78_bytes, 0, sizeof (rl78_bytes)); | |
571 | ||
572 | rl78_lex_init (str, str + strlen (str)); | |
573 | ||
574 | rl78_parse (); | |
575 | ||
9cea966c | 576 | /* This simplifies the relaxation code. */ |
0c315784 | 577 | if (rl78_bytes.n_relax || rl78_bytes.link_relax) |
9cea966c DD |
578 | { |
579 | int olen = rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops; | |
580 | /* We do it this way because we want the frag to have the | |
0c315784 DD |
581 | rl78_bytes in it, which we initialize above. The extra bytes |
582 | are for relaxing. */ | |
583 | bytes = frag_more (olen + 3); | |
9cea966c DD |
584 | frag_then = frag_now; |
585 | frag_variant (rs_machine_dependent, | |
586 | olen /* max_chars */, | |
587 | 0 /* var */, | |
588 | olen /* subtype */, | |
589 | 0 /* symbol */, | |
590 | 0 /* offset */, | |
591 | 0 /* opcode */); | |
592 | frag_then->fr_opcode = bytes; | |
593 | frag_then->fr_fix = olen + (bytes - frag_then->fr_literal); | |
594 | frag_then->fr_subtype = olen; | |
595 | frag_then->fr_var = 0; | |
596 | } | |
597 | else | |
598 | { | |
599 | bytes = frag_more (rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops); | |
600 | frag_then = frag_now; | |
601 | } | |
99c513f6 DD |
602 | |
603 | APPEND (prefix, n_prefix); | |
604 | APPEND (base, n_base); | |
605 | APPEND (ops, n_ops); | |
606 | ||
9cea966c DD |
607 | if (rl78_bytes.link_relax) |
608 | { | |
609 | fixS * f; | |
610 | ||
611 | f = fix_new (frag_then, | |
612 | (char *) bytes - frag_then->fr_literal, | |
613 | 0, | |
614 | abs_section_sym, | |
615 | rl78_bytes.link_relax | rl78_bytes.n_fixups, | |
616 | 0, | |
617 | BFD_RELOC_RL78_RELAX); | |
618 | frag_then->tc_frag_data->link_relax_fixP = f; | |
619 | } | |
620 | ||
99c513f6 DD |
621 | for (i = 0; i < rl78_bytes.n_fixups; i ++) |
622 | { | |
623 | /* index: [nbytes][type] */ | |
624 | static int reloc_map[5][4] = | |
625 | { | |
626 | { 0, 0 }, | |
627 | { BFD_RELOC_8, BFD_RELOC_8_PCREL }, | |
628 | { BFD_RELOC_16, BFD_RELOC_16_PCREL }, | |
629 | { BFD_RELOC_24, BFD_RELOC_24_PCREL }, | |
630 | { BFD_RELOC_32, BFD_RELOC_32_PCREL }, | |
631 | }; | |
632 | fixS * f; | |
633 | ||
634 | idx = rl78_bytes.fixups[i].offset / 8; | |
635 | rel = reloc_map [rl78_bytes.fixups[i].nbits / 8][(int) rl78_bytes.fixups[i].type]; | |
636 | ||
637 | if (rl78_bytes.fixups[i].reloc) | |
638 | rel = rl78_bytes.fixups[i].reloc; | |
639 | ||
640 | if (frag_then->tc_frag_data) | |
641 | exp = & frag_then->tc_frag_data->fixups[i].exp; | |
642 | else | |
643 | exp = & rl78_bytes.fixups[i].exp; | |
644 | ||
645 | f = fix_new_exp (frag_then, | |
646 | (char *) bytes + idx - frag_then->fr_literal, | |
647 | rl78_bytes.fixups[i].nbits / 8, | |
648 | exp, | |
649 | rl78_bytes.fixups[i].type == RL78REL_PCREL ? 1 : 0, | |
650 | rel); | |
651 | if (frag_then->tc_frag_data) | |
652 | frag_then->tc_frag_data->fixups[i].fixP = f; | |
653 | } | |
654 | } | |
655 | ||
656 | void | |
657 | rl78_cons_fix_new (fragS * frag, | |
658 | int where, | |
659 | int size, | |
660 | expressionS * exp) | |
661 | { | |
662 | bfd_reloc_code_real_type type; | |
c9d66558 | 663 | fixS *fixP; |
99c513f6 DD |
664 | |
665 | switch (size) | |
666 | { | |
667 | case 1: | |
668 | type = BFD_RELOC_8; | |
669 | break; | |
670 | case 2: | |
671 | type = BFD_RELOC_16; | |
672 | break; | |
673 | case 3: | |
674 | type = BFD_RELOC_24; | |
675 | break; | |
676 | case 4: | |
677 | type = BFD_RELOC_32; | |
678 | break; | |
679 | default: | |
680 | as_bad (_("unsupported constant size %d\n"), size); | |
681 | return; | |
682 | } | |
683 | ||
392ca752 DD |
684 | switch (exp->X_md) |
685 | { | |
4107ae22 DD |
686 | case BFD_RELOC_RL78_CODE: |
687 | if (size == 2) | |
688 | type = exp->X_md; | |
689 | break; | |
392ca752 DD |
690 | case BFD_RELOC_RL78_LO16: |
691 | case BFD_RELOC_RL78_HI16: | |
692 | if (size != 2) | |
6ff71e76 NC |
693 | { |
694 | /* Fixups to assembler generated expressions do not use %hi or %lo. */ | |
695 | if (frag->fr_file) | |
696 | as_bad (_("%%hi16/%%lo16 only applies to .short or .hword")); | |
697 | } | |
698 | else | |
699 | type = exp->X_md; | |
392ca752 DD |
700 | break; |
701 | case BFD_RELOC_RL78_HI8: | |
702 | if (size != 1) | |
6ff71e76 NC |
703 | { |
704 | /* Fixups to assembler generated expressions do not use %hi or %lo. */ | |
705 | if (frag->fr_file) | |
706 | as_bad (_("%%hi8 only applies to .byte")); | |
707 | } | |
708 | else | |
709 | type = exp->X_md; | |
392ca752 DD |
710 | break; |
711 | default: | |
712 | break; | |
713 | } | |
714 | ||
99c513f6 DD |
715 | if (exp->X_op == O_subtract && exp->X_op_symbol) |
716 | { | |
717 | if (size != 4 && size != 2 && size != 1) | |
718 | as_bad (_("difference of two symbols only supported with .long, .short, or .byte")); | |
719 | else | |
720 | type = BFD_RELOC_RL78_DIFF; | |
721 | } | |
722 | ||
c9d66558 DD |
723 | fixP = fix_new_exp (frag, where, (int) size, exp, 0, type); |
724 | switch (exp->X_md) | |
725 | { | |
726 | /* These are intended to have values larger than the container, | |
727 | since the backend puts only the portion we need in it. | |
728 | However, we don't have a backend-specific reloc for them as | |
729 | they're handled with complex relocations. */ | |
730 | case BFD_RELOC_RL78_LO16: | |
731 | case BFD_RELOC_RL78_HI16: | |
732 | case BFD_RELOC_RL78_HI8: | |
733 | fixP->fx_no_overflow = 1; | |
734 | break; | |
735 | default: | |
736 | break; | |
737 | } | |
99c513f6 DD |
738 | } |
739 | ||
0c315784 DD |
740 | \f |
741 | /*----------------------------------------------------------------------*/ | |
742 | /* To recap: we estimate everything based on md_estimate_size, then | |
743 | adjust based on rl78_relax_frag. When it all settles, we call | |
744 | md_convert frag to update the bytes. The relaxation types and | |
745 | relocations are in fragP->tc_frag_data, which is a copy of that | |
746 | rl78_bytes. | |
747 | ||
748 | Our scheme is as follows: fr_fix has the size of the smallest | |
749 | opcode (like BRA.S). We store the number of total bytes we need in | |
750 | fr_subtype. When we're done relaxing, we use fr_subtype and the | |
751 | existing opcode bytes to figure out what actual opcode we need to | |
752 | put in there. If the fixup isn't resolvable now, we use the | |
753 | maximal size. */ | |
754 | ||
755 | #define TRACE_RELAX 0 | |
756 | #define tprintf if (TRACE_RELAX) printf | |
757 | ||
758 | ||
759 | typedef enum | |
760 | { | |
761 | OT_other, | |
762 | OT_bt, | |
763 | OT_bt_sfr, | |
764 | OT_bt_es, | |
765 | OT_bc, | |
e896287c DD |
766 | OT_bh, |
767 | OT_sk, | |
768 | OT_call, | |
769 | OT_br, | |
0c315784 DD |
770 | } op_type_T; |
771 | ||
772 | /* We're looking for these types of relaxations: | |
773 | ||
774 | BT 00110001 sbit0cc1 addr---- (cc is 10 (BF) or 01 (BT)) | |
775 | B~T 00110001 sbit0cc1 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
776 | ||
777 | BT sfr 00110001 sbit0cc0 sfr----- addr---- | |
778 | BT ES: 00010001 00101110 sbit0cc1 addr---- | |
779 | ||
780 | BC 110111cc addr---- | |
781 | B~C 110111cc 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
782 | ||
783 | BH 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
784 | B~H 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20) | |
785 | */ | |
786 | ||
787 | /* Given the opcode bytes at OP, figure out which opcode it is and | |
788 | return the type of opcode. We use this to re-encode the opcode as | |
789 | a different size later. */ | |
790 | ||
791 | static op_type_T | |
e896287c | 792 | rl78_opcode_type (char * ops) |
0c315784 | 793 | { |
e896287c DD |
794 | unsigned char *op = (unsigned char *)ops; |
795 | ||
0c315784 DD |
796 | if (op[0] == 0x31 |
797 | && ((op[1] & 0x0f) == 0x05 | |
798 | || (op[1] & 0x0f) == 0x03)) | |
799 | return OT_bt; | |
800 | ||
801 | if (op[0] == 0x31 | |
802 | && ((op[1] & 0x0f) == 0x04 | |
803 | || (op[1] & 0x0f) == 0x02)) | |
804 | return OT_bt_sfr; | |
805 | ||
806 | if (op[0] == 0x11 | |
807 | && op[1] == 0x31 | |
808 | && ((op[2] & 0x0f) == 0x05 | |
809 | || (op[2] & 0x0f) == 0x03)) | |
810 | return OT_bt_es; | |
811 | ||
812 | if ((op[0] & 0xfc) == 0xdc) | |
813 | return OT_bc; | |
814 | ||
815 | if (op[0] == 0x61 | |
816 | && (op[1] & 0xef) == 0xc3) | |
817 | return OT_bh; | |
818 | ||
e896287c DD |
819 | if (op[0] == 0x61 |
820 | && (op[1] & 0xcf) == 0xc8) | |
821 | return OT_sk; | |
822 | ||
823 | if (op[0] == 0x61 | |
824 | && (op[1] & 0xef) == 0xe3) | |
825 | return OT_sk; | |
826 | ||
827 | if (op[0] == 0xfc) | |
828 | return OT_call; | |
829 | ||
830 | if ((op[0] & 0xec) == 0xec) | |
831 | return OT_br; | |
832 | ||
0c315784 DD |
833 | return OT_other; |
834 | } | |
835 | ||
836 | /* Returns zero if *addrP has the target address. Else returns nonzero | |
837 | if we cannot compute the target address yet. */ | |
838 | ||
839 | static int | |
840 | rl78_frag_fix_value (fragS * fragP, | |
841 | segT segment, | |
842 | int which, | |
843 | addressT * addrP, | |
844 | int need_diff, | |
845 | addressT * sym_addr) | |
846 | { | |
847 | addressT addr = 0; | |
848 | rl78_bytesT * b = fragP->tc_frag_data; | |
849 | expressionS * exp = & b->fixups[which].exp; | |
850 | ||
851 | if (need_diff && exp->X_op != O_subtract) | |
852 | return 1; | |
853 | ||
854 | if (exp->X_add_symbol) | |
855 | { | |
856 | if (S_FORCE_RELOC (exp->X_add_symbol, 1)) | |
857 | return 1; | |
858 | if (S_GET_SEGMENT (exp->X_add_symbol) != segment) | |
859 | return 1; | |
860 | addr += S_GET_VALUE (exp->X_add_symbol); | |
861 | } | |
862 | ||
863 | if (exp->X_op_symbol) | |
864 | { | |
865 | if (exp->X_op != O_subtract) | |
866 | return 1; | |
867 | if (S_FORCE_RELOC (exp->X_op_symbol, 1)) | |
868 | return 1; | |
869 | if (S_GET_SEGMENT (exp->X_op_symbol) != segment) | |
870 | return 1; | |
871 | addr -= S_GET_VALUE (exp->X_op_symbol); | |
872 | } | |
873 | if (sym_addr) | |
874 | * sym_addr = addr; | |
875 | addr += exp->X_add_number; | |
876 | * addrP = addr; | |
877 | return 0; | |
878 | } | |
879 | ||
880 | /* Estimate how big the opcode is after this relax pass. The return | |
881 | value is the difference between fr_fix and the actual size. We | |
882 | compute the total size in rl78_relax_frag and store it in fr_subtype, | |
6ff71e76 | 883 | so we only need to subtract fx_fix and return it. */ |
0c315784 | 884 | |
99c513f6 DD |
885 | int |
886 | md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED, segT segment ATTRIBUTE_UNUSED) | |
887 | { | |
0c315784 DD |
888 | int opfixsize; |
889 | int delta; | |
890 | ||
891 | /* This is the size of the opcode that's accounted for in fr_fix. */ | |
892 | opfixsize = fragP->fr_fix - (fragP->fr_opcode - fragP->fr_literal); | |
893 | /* This is the size of the opcode that isn't. */ | |
894 | delta = (fragP->fr_subtype - opfixsize); | |
895 | ||
896 | tprintf (" -> opfixsize %d delta %d\n", opfixsize, delta); | |
897 | return delta; | |
898 | } | |
899 | ||
900 | /* Given the new addresses for this relax pass, figure out how big | |
901 | each opcode must be. We store the total number of bytes needed in | |
902 | fr_subtype. The return value is the difference between the size | |
903 | after the last pass and the size after this pass, so we use the old | |
904 | fr_subtype to calculate the difference. */ | |
905 | ||
906 | int | |
907 | rl78_relax_frag (segT segment ATTRIBUTE_UNUSED, fragS * fragP, long stretch) | |
908 | { | |
909 | addressT addr0, sym_addr; | |
910 | addressT mypc; | |
911 | int disp; | |
912 | int oldsize = fragP->fr_subtype; | |
913 | int newsize = oldsize; | |
914 | op_type_T optype; | |
915 | int ri; | |
916 | ||
917 | mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); | |
918 | ||
919 | /* If we ever get more than one reloc per opcode, this is the one | |
920 | we're relaxing. */ | |
921 | ri = 0; | |
922 | ||
923 | optype = rl78_opcode_type (fragP->fr_opcode); | |
924 | /* Try to get the target address. */ | |
925 | if (rl78_frag_fix_value (fragP, segment, ri, & addr0, | |
926 | fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH, | |
927 | & sym_addr)) | |
928 | { | |
e896287c DD |
929 | /* If we don't expect the linker to do relaxing, don't emit |
930 | expanded opcodes that only the linker will relax. */ | |
931 | if (!linkrelax) | |
932 | return newsize - oldsize; | |
933 | ||
0c315784 DD |
934 | /* If we don't, we must use the maximum size for the linker. */ |
935 | switch (fragP->tc_frag_data->relax[ri].type) | |
936 | { | |
937 | case RL78_RELAX_BRANCH: | |
938 | switch (optype) | |
939 | { | |
940 | case OT_bt: | |
941 | newsize = 6; | |
942 | break; | |
943 | case OT_bt_sfr: | |
944 | case OT_bt_es: | |
945 | newsize = 7; | |
946 | break; | |
947 | case OT_bc: | |
948 | newsize = 5; | |
949 | break; | |
950 | case OT_bh: | |
951 | newsize = 6; | |
952 | break; | |
e896287c DD |
953 | case OT_sk: |
954 | newsize = 2; | |
955 | break; | |
956 | default: | |
0c315784 DD |
957 | newsize = oldsize; |
958 | break; | |
959 | } | |
960 | break; | |
961 | ||
962 | } | |
963 | fragP->fr_subtype = newsize; | |
964 | tprintf (" -> new %d old %d delta %d (external)\n", newsize, oldsize, newsize-oldsize); | |
965 | return newsize - oldsize; | |
966 | } | |
967 | ||
968 | if (sym_addr > mypc) | |
969 | addr0 += stretch; | |
970 | ||
971 | switch (fragP->tc_frag_data->relax[ri].type) | |
972 | { | |
973 | case RL78_RELAX_BRANCH: | |
974 | disp = (int) addr0 - (int) mypc; | |
975 | ||
976 | switch (optype) | |
977 | { | |
978 | case OT_bt: | |
979 | if (disp >= -128 && (disp - (oldsize-2)) <= 127) | |
980 | newsize = 3; | |
981 | else | |
982 | newsize = 6; | |
983 | break; | |
984 | case OT_bt_sfr: | |
985 | case OT_bt_es: | |
986 | if (disp >= -128 && (disp - (oldsize-3)) <= 127) | |
987 | newsize = 4; | |
988 | else | |
989 | newsize = 7; | |
990 | break; | |
991 | case OT_bc: | |
992 | if (disp >= -128 && (disp - (oldsize-1)) <= 127) | |
993 | newsize = 2; | |
994 | else | |
995 | newsize = 5; | |
996 | break; | |
997 | case OT_bh: | |
998 | if (disp >= -128 && (disp - (oldsize-2)) <= 127) | |
999 | newsize = 3; | |
1000 | else | |
1001 | newsize = 6; | |
1002 | break; | |
e896287c DD |
1003 | case OT_sk: |
1004 | newsize = 2; | |
1005 | break; | |
1006 | default: | |
0c315784 DD |
1007 | newsize = oldsize; |
1008 | break; | |
1009 | } | |
1010 | break; | |
1011 | } | |
1012 | ||
1013 | /* This prevents infinite loops in align-heavy sources. */ | |
1014 | if (newsize < oldsize) | |
1015 | { | |
1016 | if (fragP->tc_frag_data->times_shrank > 10 | |
1017 | && fragP->tc_frag_data->times_grown > 10) | |
1018 | newsize = oldsize; | |
1019 | if (fragP->tc_frag_data->times_shrank < 20) | |
1020 | fragP->tc_frag_data->times_shrank ++; | |
1021 | } | |
1022 | else if (newsize > oldsize) | |
1023 | { | |
1024 | if (fragP->tc_frag_data->times_grown < 20) | |
1025 | fragP->tc_frag_data->times_grown ++; | |
1026 | } | |
1027 | ||
1028 | fragP->fr_subtype = newsize; | |
1029 | tprintf (" -> new %d old %d delta %d\n", newsize, oldsize, newsize-oldsize); | |
1030 | return newsize - oldsize; | |
6ff71e76 NC |
1031 | } |
1032 | ||
0c315784 DD |
1033 | /* This lets us test for the opcode type and the desired size in a |
1034 | switch statement. */ | |
1035 | #define OPCODE(type,size) ((type) * 16 + (size)) | |
1036 | ||
1037 | /* Given the opcode stored in fr_opcode and the number of bytes we | |
1038 | think we need, encode a new opcode. We stored a pointer to the | |
1039 | fixup for this opcode in the tc_frag_data structure. If we can do | |
1040 | the fixup here, we change the relocation type to "none" (we test | |
1041 | for that in tc_gen_reloc) else we change it to the right type for | |
1042 | the new (biggest) opcode. */ | |
1043 | ||
1044 | void | |
1045 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, | |
1046 | segT segment ATTRIBUTE_UNUSED, | |
1047 | fragS * fragP ATTRIBUTE_UNUSED) | |
1048 | { | |
1049 | rl78_bytesT * rl78b = fragP->tc_frag_data; | |
1050 | addressT addr0, mypc; | |
1051 | int disp; | |
1052 | int reloc_type, reloc_adjust; | |
1053 | char * op = fragP->fr_opcode; | |
1054 | int keep_reloc = 0; | |
1055 | int ri; | |
1056 | int fi = (rl78b->n_fixups > 1) ? 1 : 0; | |
1057 | fixS * fix = rl78b->fixups[fi].fixP; | |
1058 | ||
1059 | /* If we ever get more than one reloc per opcode, this is the one | |
1060 | we're relaxing. */ | |
1061 | ri = 0; | |
1062 | ||
1063 | /* We used a new frag for this opcode, so the opcode address should | |
1064 | be the frag address. */ | |
1065 | mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); | |
54f66250 | 1066 | tprintf ("\033[32mmypc: 0x%x\033[0m\n", (int)mypc); |
0c315784 DD |
1067 | |
1068 | /* Try to get the target address. If we fail here, we just use the | |
1069 | largest format. */ | |
1070 | if (rl78_frag_fix_value (fragP, segment, 0, & addr0, | |
54f66250 | 1071 | fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH, 0)) |
0c315784 DD |
1072 | { |
1073 | /* We don't know the target address. */ | |
1074 | keep_reloc = 1; | |
1075 | addr0 = 0; | |
1076 | disp = 0; | |
1077 | tprintf ("unknown addr ? - %x = ?\n", (int)mypc); | |
1078 | } | |
1079 | else | |
1080 | { | |
1081 | /* We know the target address, and it's in addr0. */ | |
1082 | disp = (int) addr0 - (int) mypc; | |
1083 | tprintf ("known addr %x - %x = %d\n", (int)addr0, (int)mypc, disp); | |
1084 | } | |
1085 | ||
1086 | if (linkrelax) | |
1087 | keep_reloc = 1; | |
1088 | ||
1089 | reloc_type = BFD_RELOC_NONE; | |
1090 | reloc_adjust = 0; | |
1091 | ||
1092 | switch (fragP->tc_frag_data->relax[ri].type) | |
1093 | { | |
1094 | case RL78_RELAX_BRANCH: | |
1095 | switch (OPCODE (rl78_opcode_type (fragP->fr_opcode), fragP->fr_subtype)) | |
1096 | { | |
1097 | ||
1098 | case OPCODE (OT_bt, 3): /* BT A,$ - no change. */ | |
1099 | disp -= 3; | |
1100 | op[2] = disp; | |
e896287c | 1101 | reloc_type = keep_reloc ? BFD_RELOC_8_PCREL : BFD_RELOC_NONE; |
0c315784 DD |
1102 | break; |
1103 | ||
1104 | case OPCODE (OT_bt, 6): /* BT A,$ - long version. */ | |
1105 | disp -= 3; | |
1106 | op[1] ^= 0x06; /* toggle conditional. */ | |
1107 | op[2] = 3; /* displacement over long branch. */ | |
1108 | disp -= 3; | |
1109 | op[3] = 0xEE; /* BR $!addr20 */ | |
1110 | op[4] = disp & 0xff; | |
1111 | op[5] = disp >> 8; | |
1112 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1113 | reloc_adjust = 2; | |
1114 | break; | |
1115 | ||
1116 | case OPCODE (OT_bt_sfr, 4): /* BT PSW,$ - no change. */ | |
1117 | disp -= 4; | |
1118 | op[3] = disp; | |
e896287c | 1119 | reloc_type = keep_reloc ? BFD_RELOC_8_PCREL : BFD_RELOC_NONE; |
0c315784 DD |
1120 | break; |
1121 | ||
1122 | case OPCODE (OT_bt_sfr, 7): /* BT PSW,$ - long version. */ | |
1123 | disp -= 4; | |
1124 | op[1] ^= 0x06; /* toggle conditional. */ | |
1125 | op[3] = 3; /* displacement over long branch. */ | |
1126 | disp -= 3; | |
1127 | op[4] = 0xEE; /* BR $!addr20 */ | |
1128 | op[5] = disp & 0xff; | |
1129 | op[6] = disp >> 8; | |
1130 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1131 | reloc_adjust = 2; | |
1132 | break; | |
1133 | ||
1134 | case OPCODE (OT_bt_es, 4): /* BT ES:[HL],$ - no change. */ | |
1135 | disp -= 4; | |
1136 | op[3] = disp; | |
e896287c | 1137 | reloc_type = keep_reloc ? BFD_RELOC_8_PCREL : BFD_RELOC_NONE; |
0c315784 DD |
1138 | break; |
1139 | ||
1140 | case OPCODE (OT_bt_es, 7): /* BT PSW,$ - long version. */ | |
1141 | disp -= 4; | |
1142 | op[2] ^= 0x06; /* toggle conditional. */ | |
1143 | op[3] = 3; /* displacement over long branch. */ | |
1144 | disp -= 3; | |
1145 | op[4] = 0xEE; /* BR $!addr20 */ | |
1146 | op[5] = disp & 0xff; | |
1147 | op[6] = disp >> 8; | |
1148 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1149 | reloc_adjust = 2; | |
1150 | break; | |
1151 | ||
1152 | case OPCODE (OT_bc, 2): /* BC $ - no change. */ | |
1153 | disp -= 2; | |
1154 | op[1] = disp; | |
e896287c | 1155 | reloc_type = keep_reloc ? BFD_RELOC_8_PCREL : BFD_RELOC_NONE; |
0c315784 DD |
1156 | break; |
1157 | ||
1158 | case OPCODE (OT_bc, 5): /* BC $ - long version. */ | |
1159 | disp -= 2; | |
1160 | op[0] ^= 0x02; /* toggle conditional. */ | |
1161 | op[1] = 3; | |
1162 | disp -= 3; | |
1163 | op[2] = 0xEE; /* BR $!addr20 */ | |
1164 | op[3] = disp & 0xff; | |
1165 | op[4] = disp >> 8; | |
1166 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1167 | reloc_adjust = 2; | |
1168 | break; | |
1169 | ||
1170 | case OPCODE (OT_bh, 3): /* BH $ - no change. */ | |
1171 | disp -= 3; | |
1172 | op[2] = disp; | |
e896287c | 1173 | reloc_type = keep_reloc ? BFD_RELOC_8_PCREL : BFD_RELOC_NONE; |
0c315784 DD |
1174 | break; |
1175 | ||
1176 | case OPCODE (OT_bh, 6): /* BC $ - long version. */ | |
1177 | disp -= 3; | |
1178 | op[1] ^= 0x10; /* toggle conditional. */ | |
1179 | op[2] = 3; | |
1180 | disp -= 3; | |
1181 | op[3] = 0xEE; /* BR $!addr20 */ | |
1182 | op[4] = disp & 0xff; | |
1183 | op[5] = disp >> 8; | |
1184 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1185 | reloc_adjust = 2; | |
1186 | break; | |
1187 | ||
e896287c DD |
1188 | case OPCODE (OT_sk, 2): /* SK<cond> - no change */ |
1189 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; | |
1190 | break; | |
3739860c | 1191 | |
e896287c DD |
1192 | default: |
1193 | reloc_type = fix ? fix->fx_r_type : BFD_RELOC_NONE; | |
1194 | break; | |
0c315784 DD |
1195 | } |
1196 | break; | |
1197 | ||
1198 | default: | |
1199 | if (rl78b->n_fixups) | |
1200 | { | |
1201 | reloc_type = fix->fx_r_type; | |
1202 | reloc_adjust = 0; | |
1203 | } | |
1204 | break; | |
1205 | } | |
1206 | ||
1207 | if (rl78b->n_fixups) | |
1208 | { | |
1209 | ||
1210 | fix->fx_r_type = reloc_type; | |
1211 | fix->fx_where += reloc_adjust; | |
1212 | switch (reloc_type) | |
1213 | { | |
1214 | case BFD_RELOC_NONE: | |
1215 | fix->fx_size = 0; | |
1216 | break; | |
1217 | case BFD_RELOC_8: | |
1218 | fix->fx_size = 1; | |
1219 | break; | |
1220 | case BFD_RELOC_16_PCREL: | |
1221 | fix->fx_size = 2; | |
1222 | break; | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | fragP->fr_fix = fragP->fr_subtype + (fragP->fr_opcode - fragP->fr_literal); | |
1227 | tprintf ("fragP->fr_fix now %ld (%d + (%p - %p)\n", (long) fragP->fr_fix, | |
1228 | fragP->fr_subtype, fragP->fr_opcode, fragP->fr_literal); | |
1229 | fragP->fr_var = 0; | |
1230 | ||
1231 | tprintf ("compare 0x%lx vs 0x%lx - 0x%lx = 0x%lx (%p)\n", | |
1232 | (long)fragP->fr_fix, | |
1233 | (long)fragP->fr_next->fr_address, (long)fragP->fr_address, | |
1234 | (long)(fragP->fr_next->fr_address - fragP->fr_address), | |
1235 | fragP->fr_next); | |
1236 | ||
1237 | if (fragP->fr_next != NULL | |
1238 | && ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) | |
1239 | != fragP->fr_fix)) | |
1240 | as_bad (_("bad frag at %p : fix %ld addr %ld %ld \n"), fragP, | |
1241 | (long) fragP->fr_fix, | |
1242 | (long) fragP->fr_address, (long) fragP->fr_next->fr_address); | |
99c513f6 | 1243 | } |
9cea966c | 1244 | |
0c315784 DD |
1245 | /* End of relaxation code. |
1246 | ----------------------------------------------------------------------*/ | |
1247 | \f | |
1248 | ||
99c513f6 DD |
1249 | arelent ** |
1250 | tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp) | |
1251 | { | |
1252 | static arelent * reloc[8]; | |
1253 | int rp; | |
99c513f6 DD |
1254 | |
1255 | if (fixp->fx_r_type == BFD_RELOC_NONE) | |
1256 | { | |
1257 | reloc[0] = NULL; | |
1258 | return reloc; | |
1259 | } | |
1260 | ||
e896287c DD |
1261 | if (fixp->fx_r_type == BFD_RELOC_RL78_RELAX && !linkrelax) |
1262 | { | |
1263 | reloc[0] = NULL; | |
1264 | return reloc; | |
1265 | } | |
1266 | ||
99c513f6 DD |
1267 | if (fixp->fx_subsy |
1268 | && S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
1269 | { | |
1270 | fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy); | |
1271 | fixp->fx_subsy = NULL; | |
1272 | } | |
1273 | ||
1274 | reloc[0] = (arelent *) xmalloc (sizeof (arelent)); | |
1275 | reloc[0]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
1276 | * reloc[0]->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
1277 | reloc[0]->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1278 | reloc[0]->addend = fixp->fx_offset; | |
1279 | ||
1280 | if (fixp->fx_r_type == BFD_RELOC_RL78_32_OP | |
1281 | && fixp->fx_subsy) | |
1282 | { | |
1283 | fixp->fx_r_type = BFD_RELOC_RL78_DIFF; | |
99c513f6 DD |
1284 | } |
1285 | ||
1286 | #define OPX(REL,SYM,ADD) \ | |
1287 | reloc[rp] = (arelent *) xmalloc (sizeof (arelent)); \ | |
1288 | reloc[rp]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); \ | |
1289 | reloc[rp]->howto = bfd_reloc_type_lookup (stdoutput, REL); \ | |
1290 | reloc[rp]->addend = ADD; \ | |
1291 | * reloc[rp]->sym_ptr_ptr = SYM; \ | |
1292 | reloc[rp]->address = fixp->fx_frag->fr_address + fixp->fx_where; \ | |
1293 | reloc[++rp] = NULL | |
1294 | #define OPSYM(SYM) OPX(BFD_RELOC_RL78_SYM, SYM, 0) | |
aff1a65e NC |
1295 | |
1296 | /* FIXME: We cannot do the normal thing for an immediate value reloc, | |
1297 | ie creating a RL78_SYM reloc in the *ABS* section with an offset | |
1298 | equal to the immediate value we want to store. This fails because | |
1299 | the reloc processing in bfd_perform_relocation and bfd_install_relocation | |
1300 | will short circuit such relocs and never pass them on to the special | |
1301 | reloc processing code. So instead we create a RL78_SYM reloc against | |
1302 | the __rl78_abs__ symbol and arrange for the linker scripts to place | |
1303 | this symbol at address 0. */ | |
1304 | #define OPIMM(IMM) OPX (BFD_RELOC_RL78_SYM, symbol_get_bfdsym (rl78_abs_sym), IMM) | |
3739860c | 1305 | |
99c513f6 DD |
1306 | #define OP(OP) OPX(BFD_RELOC_RL78_##OP, *reloc[0]->sym_ptr_ptr, 0) |
1307 | #define SYM0() reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_SYM) | |
1308 | ||
1309 | rp = 1; | |
1310 | ||
1311 | /* Certain BFD relocations cannot be translated directly into | |
1312 | a single (non-Red Hat) RL78 relocation, but instead need | |
1313 | multiple RL78 relocations - handle them here. */ | |
1314 | switch (fixp->fx_r_type) | |
1315 | { | |
1316 | case BFD_RELOC_RL78_DIFF: | |
1317 | SYM0 (); | |
1318 | OPSYM (symbol_get_bfdsym (fixp->fx_subsy)); | |
1319 | OP(OP_SUBTRACT); | |
1320 | ||
1321 | switch (fixp->fx_size) | |
1322 | { | |
1323 | case 1: | |
1324 | OP(ABS8); | |
1325 | break; | |
1326 | case 2: | |
1327 | OP (ABS16); | |
1328 | break; | |
1329 | case 4: | |
1330 | OP (ABS32); | |
1331 | break; | |
1332 | } | |
1333 | break; | |
1334 | ||
1335 | case BFD_RELOC_RL78_NEG32: | |
1336 | SYM0 (); | |
1337 | OP (OP_NEG); | |
1338 | OP (ABS32); | |
1339 | break; | |
1340 | ||
4107ae22 | 1341 | case BFD_RELOC_RL78_CODE: |
b3fe4307 NC |
1342 | reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_16U); |
1343 | reloc[1] = NULL; | |
4107ae22 DD |
1344 | break; |
1345 | ||
99c513f6 DD |
1346 | case BFD_RELOC_RL78_LO16: |
1347 | SYM0 (); | |
1348 | OPIMM (0xffff); | |
1349 | OP (OP_AND); | |
1350 | OP (ABS16); | |
1351 | break; | |
1352 | ||
1353 | case BFD_RELOC_RL78_HI16: | |
1354 | SYM0 (); | |
1355 | OPIMM (16); | |
1356 | OP (OP_SHRA); | |
1357 | OP (ABS16); | |
1358 | break; | |
1359 | ||
1360 | case BFD_RELOC_RL78_HI8: | |
1361 | SYM0 (); | |
1362 | OPIMM (16); | |
1363 | OP (OP_SHRA); | |
1364 | OPIMM (0xff); | |
1365 | OP (OP_AND); | |
1366 | OP (ABS8); | |
1367 | break; | |
1368 | ||
1369 | default: | |
1370 | reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
1371 | reloc[1] = NULL; | |
1372 | break; | |
1373 | } | |
1374 | ||
1375 | return reloc; | |
1376 | } | |
1377 | ||
1378 | int | |
1379 | rl78_validate_fix_sub (struct fix * f) | |
1380 | { | |
1381 | /* We permit the subtraction of two symbols in a few cases. */ | |
1382 | /* mov #sym1-sym2, R3 */ | |
1383 | if (f->fx_r_type == BFD_RELOC_RL78_32_OP) | |
1384 | return 1; | |
1385 | /* .long sym1-sym2 */ | |
1386 | if (f->fx_r_type == BFD_RELOC_RL78_DIFF | |
1387 | && ! f->fx_pcrel | |
1388 | && (f->fx_size == 4 || f->fx_size == 2 || f->fx_size == 1)) | |
1389 | return 1; | |
1390 | return 0; | |
1391 | } | |
1392 | ||
1393 | long | |
1394 | md_pcrel_from_section (fixS * fixP, segT sec) | |
1395 | { | |
1396 | long rv; | |
1397 | ||
1398 | if (fixP->fx_addsy != NULL | |
1399 | && (! S_IS_DEFINED (fixP->fx_addsy) | |
1400 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) | |
1401 | /* The symbol is undefined (or is defined but not in this section). | |
1402 | Let the linker figure it out. */ | |
1403 | return 0; | |
1404 | ||
1405 | rv = fixP->fx_frag->fr_address + fixP->fx_where; | |
1406 | switch (fixP->fx_r_type) | |
1407 | { | |
1408 | case BFD_RELOC_8_PCREL: | |
1409 | rv += 1; | |
1410 | break; | |
1411 | case BFD_RELOC_16_PCREL: | |
1412 | rv += 2; | |
1413 | break; | |
1414 | default: | |
1415 | break; | |
1416 | } | |
1417 | return rv; | |
1418 | } | |
1419 | ||
1420 | void | |
1421 | md_apply_fix (struct fix * f ATTRIBUTE_UNUSED, | |
1422 | valueT * t ATTRIBUTE_UNUSED, | |
1423 | segT s ATTRIBUTE_UNUSED) | |
1424 | { | |
1425 | char * op; | |
1426 | unsigned long val; | |
1427 | ||
e896287c DD |
1428 | /* We always defer overflow checks for these to the linker, as it |
1429 | needs to do PLT stuff. */ | |
1430 | if (f->fx_r_type == BFD_RELOC_RL78_CODE) | |
1431 | f->fx_no_overflow = 1; | |
1432 | ||
99c513f6 DD |
1433 | if (f->fx_addsy && S_FORCE_RELOC (f->fx_addsy, 1)) |
1434 | return; | |
1435 | if (f->fx_subsy && S_FORCE_RELOC (f->fx_subsy, 1)) | |
1436 | return; | |
1437 | ||
1438 | op = f->fx_frag->fr_literal + f->fx_where; | |
1439 | val = (unsigned long) * t; | |
1440 | ||
e896287c DD |
1441 | if (f->fx_addsy == NULL) |
1442 | f->fx_done = 1; | |
1443 | ||
99c513f6 DD |
1444 | switch (f->fx_r_type) |
1445 | { | |
1446 | case BFD_RELOC_NONE: | |
1447 | break; | |
1448 | ||
9cea966c | 1449 | case BFD_RELOC_RL78_RELAX: |
e896287c | 1450 | f->fx_done = 0; |
9cea966c DD |
1451 | break; |
1452 | ||
99c513f6 | 1453 | case BFD_RELOC_8_PCREL: |
0a899fd5 DD |
1454 | if ((long)val < -128 || (long)val > 127) |
1455 | as_bad_where (f->fx_file, f->fx_line, | |
1456 | _("value of %ld too large for 8-bit branch"), | |
1457 | val); | |
1458 | /* Fall through. */ | |
1459 | case BFD_RELOC_8: | |
54f66250 | 1460 | case BFD_RELOC_RL78_SADDR: /* We need to store the 8 LSB, but this works. */ |
99c513f6 DD |
1461 | op[0] = val; |
1462 | break; | |
1463 | ||
99c513f6 | 1464 | case BFD_RELOC_16_PCREL: |
0a899fd5 DD |
1465 | if ((long)val < -32768 || (long)val > 32767) |
1466 | as_bad_where (f->fx_file, f->fx_line, | |
1467 | _("value of %ld too large for 16-bit branch"), | |
1468 | val); | |
1469 | /* Fall through. */ | |
1470 | case BFD_RELOC_16: | |
4107ae22 | 1471 | case BFD_RELOC_RL78_CODE: |
99c513f6 DD |
1472 | op[0] = val; |
1473 | op[1] = val >> 8; | |
1474 | break; | |
1475 | ||
1476 | case BFD_RELOC_24: | |
1477 | op[0] = val; | |
1478 | op[1] = val >> 8; | |
1479 | op[2] = val >> 16; | |
1480 | break; | |
1481 | ||
1482 | case BFD_RELOC_32: | |
99c513f6 DD |
1483 | op[0] = val; |
1484 | op[1] = val >> 8; | |
1485 | op[2] = val >> 16; | |
1486 | op[3] = val >> 24; | |
1487 | break; | |
1488 | ||
3ce3a066 NC |
1489 | case BFD_RELOC_RL78_DIFF: |
1490 | op[0] = val; | |
1491 | if (f->fx_size > 1) | |
1492 | op[1] = val >> 8; | |
1493 | if (f->fx_size > 2) | |
1494 | op[2] = val >> 16; | |
1495 | if (f->fx_size > 3) | |
1496 | op[3] = val >> 24; | |
1497 | break; | |
1498 | ||
b3fe4307 NC |
1499 | case BFD_RELOC_RL78_HI8: |
1500 | val = val >> 16; | |
1501 | op[0] = val; | |
1502 | break; | |
1503 | ||
1504 | case BFD_RELOC_RL78_HI16: | |
1505 | val = val >> 16; | |
1506 | op[0] = val; | |
1507 | op[1] = val >> 8; | |
1508 | break; | |
1509 | ||
1510 | case BFD_RELOC_RL78_LO16: | |
1511 | op[0] = val; | |
1512 | op[1] = val >> 8; | |
1513 | break; | |
1514 | ||
99c513f6 DD |
1515 | default: |
1516 | as_bad (_("Unknown reloc in md_apply_fix: %s"), | |
1517 | bfd_get_reloc_code_name (f->fx_r_type)); | |
1518 | break; | |
1519 | } | |
1520 | ||
99c513f6 DD |
1521 | } |
1522 | ||
1523 | valueT | |
1524 | md_section_align (segT segment, valueT size) | |
1525 | { | |
1526 | int align = bfd_get_section_alignment (stdoutput, segment); | |
8d3842cd | 1527 | return ((size + (1 << align) - 1) & -(1 << align)); |
99c513f6 | 1528 | } |