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252b5132 RH |
1 | /* tc-sh.c -- Assemble code for the Hitachi Super-H |
2 | Copyright (C) 1993, 94, 95, 96, 97, 1998 Free Software Foundation. | |
3 | ||
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* | |
22 | Written By Steve Chamberlain | |
23 | sac@cygnus.com | |
24 | */ | |
25 | ||
26 | #include <stdio.h> | |
27 | #include "as.h" | |
28 | #include "bfd.h" | |
29 | #include "subsegs.h" | |
30 | #define DEFINE_TABLE | |
31 | #include "opcodes/sh-opc.h" | |
32 | #include <ctype.h> | |
33 | const char comment_chars[] = "!"; | |
34 | const char line_separator_chars[] = ";"; | |
35 | const char line_comment_chars[] = "!#"; | |
36 | ||
37 | static void s_uses PARAMS ((int)); | |
38 | ||
39 | static void sh_count_relocs PARAMS ((bfd *, segT, PTR)); | |
40 | static void sh_frob_section PARAMS ((bfd *, segT, PTR)); | |
41 | ||
42 | /* This table describes all the machine specific pseudo-ops the assembler | |
43 | has to support. The fields are: | |
44 | pseudo-op name without dot | |
45 | function to call to execute this pseudo-op | |
46 | Integer arg to pass to the function | |
47 | */ | |
48 | ||
49 | void cons (); | |
50 | void s_align_bytes (); | |
51 | static void s_uacons PARAMS ((int)); | |
52 | ||
53 | int shl = 0; | |
54 | ||
55 | static void | |
56 | little (ignore) | |
57 | int ignore; | |
58 | { | |
59 | shl = 1; | |
60 | target_big_endian = 0; | |
61 | } | |
62 | ||
63 | const pseudo_typeS md_pseudo_table[] = | |
64 | { | |
65 | {"int", cons, 4}, | |
66 | {"word", cons, 2}, | |
67 | {"form", listing_psize, 0}, | |
68 | {"little", little, 0}, | |
69 | {"heading", listing_title, 0}, | |
70 | {"import", s_ignore, 0}, | |
71 | {"page", listing_eject, 0}, | |
72 | {"program", s_ignore, 0}, | |
73 | {"uses", s_uses, 0}, | |
74 | {"uaword", s_uacons, 2}, | |
75 | {"ualong", s_uacons, 4}, | |
76 | {0, 0, 0} | |
77 | }; | |
78 | ||
79 | /*int md_reloc_size; */ | |
80 | ||
81 | int sh_relax; /* set if -relax seen */ | |
82 | ||
83 | /* Whether -small was seen. */ | |
84 | ||
85 | int sh_small; | |
86 | ||
87 | const char EXP_CHARS[] = "eE"; | |
88 | ||
89 | /* Chars that mean this number is a floating point constant */ | |
90 | /* As in 0f12.456 */ | |
91 | /* or 0d1.2345e12 */ | |
92 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
93 | ||
94 | #define C(a,b) ENCODE_RELAX(a,b) | |
95 | ||
96 | #define JREG 14 /* Register used as a temp when relaxing */ | |
97 | #define ENCODE_RELAX(what,length) (((what) << 4) + (length)) | |
98 | #define GET_WHAT(x) ((x>>4)) | |
99 | ||
100 | /* These are the three types of relaxable instrction */ | |
101 | #define COND_JUMP 1 | |
102 | #define COND_JUMP_DELAY 2 | |
103 | #define UNCOND_JUMP 3 | |
104 | #define END 4 | |
105 | ||
106 | #define UNDEF_DISP 0 | |
107 | #define COND8 1 | |
108 | #define COND12 2 | |
109 | #define COND32 3 | |
110 | #define UNCOND12 1 | |
111 | #define UNCOND32 2 | |
112 | #define UNDEF_WORD_DISP 4 | |
113 | ||
114 | #define UNCOND12 1 | |
115 | #define UNCOND32 2 | |
116 | ||
117 | /* Branch displacements are from the address of the branch plus | |
118 | four, thus all minimum and maximum values have 4 added to them. */ | |
119 | #define COND8_F 258 | |
120 | #define COND8_M -252 | |
121 | #define COND8_LENGTH 2 | |
122 | ||
123 | /* There is one extra instruction before the branch, so we must add | |
124 | two more bytes to account for it. */ | |
125 | #define COND12_F 4100 | |
126 | #define COND12_M -4090 | |
127 | #define COND12_LENGTH 6 | |
128 | ||
129 | #define COND12_DELAY_LENGTH 4 | |
130 | ||
131 | /* ??? The minimum and maximum values are wrong, but this does not matter | |
132 | since this relocation type is not supported yet. */ | |
133 | #define COND32_F (1<<30) | |
134 | #define COND32_M -(1<<30) | |
135 | #define COND32_LENGTH 14 | |
136 | ||
137 | #define UNCOND12_F 4098 | |
138 | #define UNCOND12_M -4092 | |
139 | #define UNCOND12_LENGTH 2 | |
140 | ||
141 | /* ??? The minimum and maximum values are wrong, but this does not matter | |
142 | since this relocation type is not supported yet. */ | |
143 | #define UNCOND32_F (1<<30) | |
144 | #define UNCOND32_M -(1<<30) | |
145 | #define UNCOND32_LENGTH 14 | |
146 | ||
147 | const relax_typeS md_relax_table[C (END, 0)] = { | |
148 | { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, | |
149 | { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, | |
150 | ||
151 | { 0 }, | |
152 | /* C (COND_JUMP, COND8) */ | |
153 | { COND8_F, COND8_M, COND8_LENGTH, C (COND_JUMP, COND12) }, | |
154 | /* C (COND_JUMP, COND12) */ | |
155 | { COND12_F, COND12_M, COND12_LENGTH, C (COND_JUMP, COND32), }, | |
156 | /* C (COND_JUMP, COND32) */ | |
157 | { COND32_F, COND32_M, COND32_LENGTH, 0, }, | |
158 | { 0 }, { 0 }, { 0 }, { 0 }, | |
159 | { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, | |
160 | ||
161 | { 0 }, | |
162 | /* C (COND_JUMP_DELAY, COND8) */ | |
163 | { COND8_F, COND8_M, COND8_LENGTH, C (COND_JUMP_DELAY, COND12) }, | |
164 | /* C (COND_JUMP_DELAY, COND12) */ | |
165 | { COND12_F, COND12_M, COND12_DELAY_LENGTH, C (COND_JUMP_DELAY, COND32), }, | |
166 | /* C (COND_JUMP_DELAY, COND32) */ | |
167 | { COND32_F, COND32_M, COND32_LENGTH, 0, }, | |
168 | { 0 }, { 0 }, { 0 }, { 0 }, | |
169 | { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, | |
170 | ||
171 | { 0 }, | |
172 | /* C (UNCOND_JUMP, UNCOND12) */ | |
173 | { UNCOND12_F, UNCOND12_M, UNCOND12_LENGTH, C (UNCOND_JUMP, UNCOND32), }, | |
174 | /* C (UNCOND_JUMP, UNCOND32) */ | |
175 | { UNCOND32_F, UNCOND32_M, UNCOND32_LENGTH, 0, }, | |
176 | { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, | |
177 | { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, { 0 }, | |
178 | }; | |
179 | ||
180 | static struct hash_control *opcode_hash_control; /* Opcode mnemonics */ | |
181 | ||
182 | /* | |
183 | This function is called once, at assembler startup time. This should | |
184 | set up all the tables, etc that the MD part of the assembler needs | |
185 | */ | |
186 | ||
187 | void | |
188 | md_begin () | |
189 | { | |
190 | sh_opcode_info *opcode; | |
191 | char *prev_name = ""; | |
192 | ||
193 | if (! shl) | |
194 | target_big_endian = 1; | |
195 | ||
196 | opcode_hash_control = hash_new (); | |
197 | ||
198 | /* Insert unique names into hash table */ | |
199 | for (opcode = sh_table; opcode->name; opcode++) | |
200 | { | |
201 | if (strcmp (prev_name, opcode->name)) | |
202 | { | |
203 | prev_name = opcode->name; | |
204 | hash_insert (opcode_hash_control, opcode->name, (char *) opcode); | |
205 | } | |
206 | else | |
207 | { | |
208 | /* Make all the opcodes with the same name point to the same | |
209 | string */ | |
210 | opcode->name = prev_name; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
215 | static int reg_m; | |
216 | static int reg_n; | |
217 | static int reg_b; | |
218 | ||
219 | static expressionS immediate; /* absolute expression */ | |
220 | ||
221 | typedef struct | |
222 | { | |
223 | sh_arg_type type; | |
224 | int reg; | |
225 | } | |
226 | ||
227 | sh_operand_info; | |
228 | ||
229 | /* try and parse a reg name, returns number of chars consumed */ | |
230 | static int | |
231 | parse_reg (src, mode, reg) | |
232 | char *src; | |
233 | int *mode; | |
234 | int *reg; | |
235 | { | |
236 | /* We use !isalnum for the next character after the register name, to | |
237 | make sure that we won't accidentally recognize a symbol name such as | |
238 | 'sram' as being a reference to the register 'sr'. */ | |
239 | ||
240 | if (src[0] == 'r') | |
241 | { | |
242 | if (src[1] >= '0' && src[1] <= '7' && strncmp(&src[2], "_bank", 5) == 0 | |
243 | && ! isalnum ((unsigned char) src[7])) | |
244 | { | |
245 | *mode = A_REG_B; | |
246 | *reg = (src[1] - '0'); | |
247 | return 7; | |
248 | } | |
249 | } | |
250 | ||
251 | if (src[0] == 'r') | |
252 | { | |
253 | if (src[1] == '1') | |
254 | { | |
255 | if (src[2] >= '0' && src[2] <= '5' | |
256 | && ! isalnum ((unsigned char) src[3])) | |
257 | { | |
258 | *mode = A_REG_N; | |
259 | *reg = 10 + src[2] - '0'; | |
260 | return 3; | |
261 | } | |
262 | } | |
263 | if (src[1] >= '0' && src[1] <= '9' | |
264 | && ! isalnum ((unsigned char) src[2])) | |
265 | { | |
266 | *mode = A_REG_N; | |
267 | *reg = (src[1] - '0'); | |
268 | return 2; | |
269 | } | |
270 | } | |
271 | ||
272 | if (src[0] == 's' | |
273 | && src[1] == 's' | |
274 | && src[2] == 'r' && ! isalnum ((unsigned char) src[3])) | |
275 | { | |
276 | *mode = A_SSR; | |
277 | return 3; | |
278 | } | |
279 | ||
280 | if (src[0] == 's' && src[1] == 'p' && src[2] == 'c' | |
281 | && ! isalnum ((unsigned char) src[3])) | |
282 | { | |
283 | *mode = A_SPC; | |
284 | return 3; | |
285 | } | |
286 | ||
287 | if (src[0] == 's' && src[1] == 'g' && src[2] == 'r' | |
288 | && ! isalnum ((unsigned char) src[3])) | |
289 | { | |
290 | *mode = A_SGR; | |
291 | return 3; | |
292 | } | |
293 | ||
294 | if (src[0] == 'd' && src[1] == 'b' && src[2] == 'r' | |
295 | && ! isalnum ((unsigned char) src[3])) | |
296 | { | |
297 | *mode = A_DBR; | |
298 | return 3; | |
299 | } | |
300 | ||
301 | if (src[0] == 's' && src[1] == 'r' && ! isalnum ((unsigned char) src[2])) | |
302 | { | |
303 | *mode = A_SR; | |
304 | return 2; | |
305 | } | |
306 | ||
307 | if (src[0] == 's' && src[1] == 'p' && ! isalnum ((unsigned char) src[2])) | |
308 | { | |
309 | *mode = A_REG_N; | |
310 | *reg = 15; | |
311 | return 2; | |
312 | } | |
313 | ||
314 | if (src[0] == 'p' && src[1] == 'r' && ! isalnum ((unsigned char) src[2])) | |
315 | { | |
316 | *mode = A_PR; | |
317 | return 2; | |
318 | } | |
319 | if (src[0] == 'p' && src[1] == 'c' && ! isalnum ((unsigned char) src[2])) | |
320 | { | |
321 | *mode = A_DISP_PC; | |
322 | return 2; | |
323 | } | |
324 | if (src[0] == 'g' && src[1] == 'b' && src[2] == 'r' | |
325 | && ! isalnum ((unsigned char) src[3])) | |
326 | { | |
327 | *mode = A_GBR; | |
328 | return 3; | |
329 | } | |
330 | if (src[0] == 'v' && src[1] == 'b' && src[2] == 'r' | |
331 | && ! isalnum ((unsigned char) src[3])) | |
332 | { | |
333 | *mode = A_VBR; | |
334 | return 3; | |
335 | } | |
336 | ||
337 | if (src[0] == 'm' && src[1] == 'a' && src[2] == 'c' | |
338 | && ! isalnum ((unsigned char) src[4])) | |
339 | { | |
340 | if (src[3] == 'l') | |
341 | { | |
342 | *mode = A_MACL; | |
343 | return 4; | |
344 | } | |
345 | if (src[3] == 'h') | |
346 | { | |
347 | *mode = A_MACH; | |
348 | return 4; | |
349 | } | |
350 | } | |
351 | if (src[0] == 'f' && src[1] == 'r') | |
352 | { | |
353 | if (src[2] == '1') | |
354 | { | |
355 | if (src[3] >= '0' && src[3] <= '5' | |
356 | && ! isalnum ((unsigned char) src[4])) | |
357 | { | |
358 | *mode = F_REG_N; | |
359 | *reg = 10 + src[3] - '0'; | |
360 | return 4; | |
361 | } | |
362 | } | |
363 | if (src[2] >= '0' && src[2] <= '9' | |
364 | && ! isalnum ((unsigned char) src[3])) | |
365 | { | |
366 | *mode = F_REG_N; | |
367 | *reg = (src[2] - '0'); | |
368 | return 3; | |
369 | } | |
370 | } | |
371 | if (src[0] == 'd' && src[1] == 'r') | |
372 | { | |
373 | if (src[2] == '1') | |
374 | { | |
375 | if (src[3] >= '0' && src[3] <= '4' && ! ((src[3] - '0') & 1) | |
376 | && ! isalnum ((unsigned char) src[4])) | |
377 | { | |
378 | *mode = D_REG_N; | |
379 | *reg = 10 + src[3] - '0'; | |
380 | return 4; | |
381 | } | |
382 | } | |
383 | if (src[2] >= '0' && src[2] <= '8' && ! ((src[2] - '0') & 1) | |
384 | && ! isalnum ((unsigned char) src[3])) | |
385 | { | |
386 | *mode = D_REG_N; | |
387 | *reg = (src[2] - '0'); | |
388 | return 3; | |
389 | } | |
390 | } | |
391 | if (src[0] == 'x' && src[1] == 'd') | |
392 | { | |
393 | if (src[2] == '1') | |
394 | { | |
395 | if (src[3] >= '0' && src[3] <= '4' && ! ((src[3] - '0') & 1) | |
396 | && ! isalnum ((unsigned char) src[4])) | |
397 | { | |
398 | *mode = X_REG_N; | |
399 | *reg = 11 + src[3] - '0'; | |
400 | return 4; | |
401 | } | |
402 | } | |
403 | if (src[2] >= '0' && src[2] <= '8' && ! ((src[2] - '0') & 1) | |
404 | && ! isalnum ((unsigned char) src[3])) | |
405 | { | |
406 | *mode = X_REG_N; | |
407 | *reg = (src[2] - '0') + 1; | |
408 | return 3; | |
409 | } | |
410 | } | |
411 | if (src[0] == 'f' && src[1] == 'v') | |
412 | { | |
413 | if (src[2] == '1'&& src[3] == '2' && ! isalnum ((unsigned char) src[4])) | |
414 | { | |
415 | *mode = V_REG_N; | |
416 | *reg = 12; | |
417 | return 4; | |
418 | } | |
419 | if ((src[2] == '0' || src[2] == '4' || src[2] == '8') | |
420 | && ! isalnum ((unsigned char) src[3])) | |
421 | { | |
422 | *mode = V_REG_N; | |
423 | *reg = (src[2] - '0'); | |
424 | return 3; | |
425 | } | |
426 | } | |
427 | if (src[0] == 'f' && src[1] == 'p' && src[2] == 'u' && src[3] == 'l' | |
428 | && ! isalnum ((unsigned char) src[4])) | |
429 | { | |
430 | *mode = FPUL_N; | |
431 | return 4; | |
432 | } | |
433 | ||
434 | if (src[0] == 'f' && src[1] == 'p' && src[2] == 's' && src[3] == 'c' | |
435 | && src[4] == 'r' && ! isalnum ((unsigned char) src[5])) | |
436 | { | |
437 | *mode = FPSCR_N; | |
438 | return 5; | |
439 | } | |
440 | ||
441 | if (src[0] == 'x' && src[1] == 'm' && src[2] == 't' && src[3] == 'r' | |
442 | && src[4] == 'x' && ! isalnum ((unsigned char) src[5])) | |
443 | { | |
444 | *mode = XMTRX_M4; | |
445 | return 5; | |
446 | } | |
447 | ||
448 | return 0; | |
449 | } | |
450 | ||
451 | static symbolS *dot() | |
452 | { | |
453 | const char *fake; | |
454 | ||
455 | /* JF: '.' is pseudo symbol with value of current location | |
456 | in current segment. */ | |
457 | fake = FAKE_LABEL_NAME; | |
458 | return symbol_new (fake, | |
459 | now_seg, | |
460 | (valueT) frag_now_fix (), | |
461 | frag_now); | |
462 | ||
463 | } | |
464 | ||
465 | ||
466 | static | |
467 | char * | |
468 | parse_exp (s) | |
469 | char *s; | |
470 | { | |
471 | char *save; | |
472 | char *new; | |
473 | ||
474 | save = input_line_pointer; | |
475 | input_line_pointer = s; | |
476 | expression (&immediate); | |
477 | if (immediate.X_op == O_absent) | |
478 | as_bad (_("missing operand")); | |
479 | new = input_line_pointer; | |
480 | input_line_pointer = save; | |
481 | return new; | |
482 | } | |
483 | ||
484 | ||
485 | /* The many forms of operand: | |
486 | ||
487 | Rn Register direct | |
488 | @Rn Register indirect | |
489 | @Rn+ Autoincrement | |
490 | @-Rn Autodecrement | |
491 | @(disp:4,Rn) | |
492 | @(disp:8,GBR) | |
493 | @(disp:8,PC) | |
494 | ||
495 | @(R0,Rn) | |
496 | @(R0,GBR) | |
497 | ||
498 | disp:8 | |
499 | disp:12 | |
500 | #imm8 | |
501 | pr, gbr, vbr, macl, mach | |
502 | ||
503 | */ | |
504 | ||
505 | static | |
506 | char * | |
507 | parse_at (src, op) | |
508 | char *src; | |
509 | sh_operand_info *op; | |
510 | { | |
511 | int len; | |
512 | int mode; | |
513 | src++; | |
514 | if (src[0] == '-') | |
515 | { | |
516 | /* Must be predecrement */ | |
517 | src++; | |
518 | ||
519 | len = parse_reg (src, &mode, &(op->reg)); | |
520 | if (mode != A_REG_N) | |
521 | as_bad (_("illegal register after @-")); | |
522 | ||
523 | op->type = A_DEC_N; | |
524 | src += len; | |
525 | } | |
526 | else if (src[0] == '(') | |
527 | { | |
528 | /* Could be @(disp, rn), @(disp, gbr), @(disp, pc), @(r0, gbr) or | |
529 | @(r0, rn) */ | |
530 | src++; | |
531 | len = parse_reg (src, &mode, &(op->reg)); | |
532 | if (len && mode == A_REG_N) | |
533 | { | |
534 | src += len; | |
535 | if (op->reg != 0) | |
536 | { | |
537 | as_bad (_("must be @(r0,...)")); | |
538 | } | |
539 | if (src[0] == ',') | |
540 | src++; | |
541 | /* Now can be rn or gbr */ | |
542 | len = parse_reg (src, &mode, &(op->reg)); | |
543 | if (mode == A_GBR) | |
544 | { | |
545 | op->type = A_R0_GBR; | |
546 | } | |
547 | else if (mode == A_REG_N) | |
548 | { | |
549 | op->type = A_IND_R0_REG_N; | |
550 | } | |
551 | else | |
552 | { | |
553 | as_bad (_("syntax error in @(r0,...)")); | |
554 | } | |
555 | } | |
556 | else | |
557 | { | |
558 | /* Must be an @(disp,.. thing) */ | |
559 | src = parse_exp (src); | |
560 | if (src[0] == ',') | |
561 | src++; | |
562 | /* Now can be rn, gbr or pc */ | |
563 | len = parse_reg (src, &mode, &op->reg); | |
564 | if (len) | |
565 | { | |
566 | if (mode == A_REG_N) | |
567 | { | |
568 | op->type = A_DISP_REG_N; | |
569 | } | |
570 | else if (mode == A_GBR) | |
571 | { | |
572 | op->type = A_DISP_GBR; | |
573 | } | |
574 | else if (mode == A_DISP_PC) | |
575 | { | |
576 | /* Turn a plain @(4,pc) into @(.+4,pc) */ | |
577 | if (immediate.X_op == O_constant) { | |
578 | immediate.X_add_symbol = dot(); | |
579 | immediate.X_op = O_symbol; | |
580 | } | |
581 | op->type = A_DISP_PC; | |
582 | } | |
583 | else | |
584 | { | |
585 | as_bad (_("syntax error in @(disp,[Rn, gbr, pc])")); | |
586 | } | |
587 | } | |
588 | else | |
589 | { | |
590 | as_bad (_("syntax error in @(disp,[Rn, gbr, pc])")); | |
591 | } | |
592 | } | |
593 | src += len; | |
594 | if (src[0] != ')') | |
595 | as_bad (_("expecting )")); | |
596 | else | |
597 | src++; | |
598 | } | |
599 | else | |
600 | { | |
601 | src += parse_reg (src, &mode, &(op->reg)); | |
602 | if (mode != A_REG_N) | |
603 | { | |
604 | as_bad (_("illegal register after @")); | |
605 | } | |
606 | if (src[0] == '+') | |
607 | { | |
608 | op->type = A_INC_N; | |
609 | src++; | |
610 | } | |
611 | else | |
612 | { | |
613 | op->type = A_IND_N; | |
614 | } | |
615 | } | |
616 | return src; | |
617 | } | |
618 | ||
619 | static void | |
620 | get_operand (ptr, op) | |
621 | char **ptr; | |
622 | sh_operand_info *op; | |
623 | { | |
624 | char *src = *ptr; | |
625 | int mode = -1; | |
626 | unsigned int len; | |
627 | ||
628 | if (src[0] == '#') | |
629 | { | |
630 | src++; | |
631 | *ptr = parse_exp (src); | |
632 | op->type = A_IMM; | |
633 | return; | |
634 | } | |
635 | ||
636 | else if (src[0] == '@') | |
637 | { | |
638 | *ptr = parse_at (src, op); | |
639 | return; | |
640 | } | |
641 | len = parse_reg (src, &mode, &(op->reg)); | |
642 | if (len) | |
643 | { | |
644 | *ptr = src + len; | |
645 | op->type = mode; | |
646 | return; | |
647 | } | |
648 | else | |
649 | { | |
650 | /* Not a reg, the only thing left is a displacement */ | |
651 | *ptr = parse_exp (src); | |
652 | op->type = A_DISP_PC; | |
653 | return; | |
654 | } | |
655 | } | |
656 | ||
657 | static | |
658 | char * | |
659 | get_operands (info, args, operand) | |
660 | sh_opcode_info *info; | |
661 | char *args; | |
662 | sh_operand_info *operand; | |
663 | ||
664 | { | |
665 | char *ptr = args; | |
666 | if (info->arg[0]) | |
667 | { | |
668 | ptr++; | |
669 | ||
670 | get_operand (&ptr, operand + 0); | |
671 | if (info->arg[1]) | |
672 | { | |
673 | if (*ptr == ',') | |
674 | { | |
675 | ptr++; | |
676 | } | |
677 | get_operand (&ptr, operand + 1); | |
678 | if (info->arg[2]) | |
679 | { | |
680 | if (*ptr == ',') | |
681 | { | |
682 | ptr++; | |
683 | } | |
684 | get_operand (&ptr, operand + 2); | |
685 | } | |
686 | else | |
687 | { | |
688 | operand[2].type = 0; | |
689 | } | |
690 | } | |
691 | else | |
692 | { | |
693 | operand[1].type = 0; | |
694 | operand[2].type = 0; | |
695 | } | |
696 | } | |
697 | else | |
698 | { | |
699 | operand[0].type = 0; | |
700 | operand[1].type = 0; | |
701 | operand[2].type = 0; | |
702 | } | |
703 | return ptr; | |
704 | } | |
705 | ||
706 | /* Passed a pointer to a list of opcodes which use different | |
707 | addressing modes, return the opcode which matches the opcodes | |
708 | provided | |
709 | */ | |
710 | ||
711 | static | |
712 | sh_opcode_info * | |
713 | get_specific (opcode, operands) | |
714 | sh_opcode_info *opcode; | |
715 | sh_operand_info *operands; | |
716 | { | |
717 | sh_opcode_info *this_try = opcode; | |
718 | char *name = opcode->name; | |
719 | int n = 0; | |
720 | while (opcode->name) | |
721 | { | |
722 | this_try = opcode++; | |
723 | if (this_try->name != name) | |
724 | { | |
725 | /* We've looked so far down the table that we've run out of | |
726 | opcodes with the same name */ | |
727 | return 0; | |
728 | } | |
729 | /* look at both operands needed by the opcodes and provided by | |
730 | the user - since an arg test will often fail on the same arg | |
731 | again and again, we'll try and test the last failing arg the | |
732 | first on each opcode try */ | |
733 | ||
734 | for (n = 0; this_try->arg[n]; n++) | |
735 | { | |
736 | sh_operand_info *user = operands + n; | |
737 | sh_arg_type arg = this_try->arg[n]; | |
738 | switch (arg) | |
739 | { | |
740 | case A_IMM: | |
741 | case A_BDISP12: | |
742 | case A_BDISP8: | |
743 | case A_DISP_GBR: | |
744 | case A_DISP_PC: | |
745 | case A_MACH: | |
746 | case A_PR: | |
747 | case A_MACL: | |
748 | if (user->type != arg) | |
749 | goto fail; | |
750 | break; | |
751 | case A_R0: | |
752 | /* opcode needs r0 */ | |
753 | if (user->type != A_REG_N || user->reg != 0) | |
754 | goto fail; | |
755 | break; | |
756 | case A_R0_GBR: | |
757 | if (user->type != A_R0_GBR || user->reg != 0) | |
758 | goto fail; | |
759 | break; | |
760 | case F_FR0: | |
761 | if (user->type != F_REG_N || user->reg != 0) | |
762 | goto fail; | |
763 | break; | |
764 | ||
765 | case A_REG_N: | |
766 | case A_INC_N: | |
767 | case A_DEC_N: | |
768 | case A_IND_N: | |
769 | case A_IND_R0_REG_N: | |
770 | case A_DISP_REG_N: | |
771 | case F_REG_N: | |
772 | case D_REG_N: | |
773 | case X_REG_N: | |
774 | case V_REG_N: | |
775 | case FPUL_N: | |
776 | case FPSCR_N: | |
777 | /* Opcode needs rn */ | |
778 | if (user->type != arg) | |
779 | goto fail; | |
780 | reg_n = user->reg; | |
781 | break; | |
782 | case FD_REG_N: | |
783 | if (user->type != F_REG_N && user->type != D_REG_N) | |
784 | goto fail; | |
785 | reg_n = user->reg; | |
786 | break; | |
787 | case DX_REG_N: | |
788 | if (user->type != D_REG_N && user->type != X_REG_N) | |
789 | goto fail; | |
790 | reg_n = user->reg; | |
791 | break; | |
792 | case A_GBR: | |
793 | case A_SR: | |
794 | case A_VBR: | |
795 | case A_SSR: | |
796 | case A_SPC: | |
797 | case A_SGR: | |
798 | case A_DBR: | |
799 | if (user->type != arg) | |
800 | goto fail; | |
801 | break; | |
802 | ||
803 | case A_REG_B: | |
804 | if (user->type != arg) | |
805 | goto fail; | |
806 | reg_b = user->reg; | |
807 | break; | |
808 | ||
809 | case A_REG_M: | |
810 | case A_INC_M: | |
811 | case A_DEC_M: | |
812 | case A_IND_M: | |
813 | case A_IND_R0_REG_M: | |
814 | case A_DISP_REG_M: | |
815 | /* Opcode needs rn */ | |
816 | if (user->type != arg - A_REG_M + A_REG_N) | |
817 | goto fail; | |
818 | reg_m = user->reg; | |
819 | break; | |
820 | ||
821 | case F_REG_M: | |
822 | case D_REG_M: | |
823 | case X_REG_M: | |
824 | case V_REG_M: | |
825 | case FPUL_M: | |
826 | case FPSCR_M: | |
827 | /* Opcode needs rn */ | |
828 | if (user->type != arg - F_REG_M + F_REG_N) | |
829 | goto fail; | |
830 | reg_m = user->reg; | |
831 | break; | |
832 | case DX_REG_M: | |
833 | if (user->type != D_REG_N && user->type != X_REG_N) | |
834 | goto fail; | |
835 | reg_m = user->reg; | |
836 | break; | |
837 | case XMTRX_M4: | |
838 | if (user->type != XMTRX_M4) | |
839 | goto fail; | |
840 | reg_m = 4; | |
841 | break; | |
842 | ||
843 | default: | |
844 | printf (_("unhandled %d\n"), arg); | |
845 | goto fail; | |
846 | } | |
847 | } | |
848 | return this_try; | |
849 | fail:; | |
850 | } | |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
855 | int | |
856 | check (operand, low, high) | |
857 | expressionS *operand; | |
858 | int low; | |
859 | int high; | |
860 | { | |
861 | if (operand->X_op != O_constant | |
862 | || operand->X_add_number < low | |
863 | || operand->X_add_number > high) | |
864 | { | |
865 | as_bad (_("operand must be absolute in range %d..%d"), low, high); | |
866 | } | |
867 | return operand->X_add_number; | |
868 | } | |
869 | ||
870 | ||
871 | static void | |
872 | insert (where, how, pcrel) | |
873 | char *where; | |
874 | int how; | |
875 | int pcrel; | |
876 | { | |
877 | fix_new_exp (frag_now, | |
878 | where - frag_now->fr_literal, | |
879 | 2, | |
880 | &immediate, | |
881 | pcrel, | |
882 | how); | |
883 | } | |
884 | ||
885 | static void | |
886 | build_relax (opcode) | |
887 | sh_opcode_info *opcode; | |
888 | { | |
889 | int high_byte = target_big_endian ? 0 : 1; | |
890 | char *p; | |
891 | ||
892 | if (opcode->arg[0] == A_BDISP8) | |
893 | { | |
894 | int what = (opcode->nibbles[1] & 4) ? COND_JUMP_DELAY : COND_JUMP; | |
895 | p = frag_var (rs_machine_dependent, | |
896 | md_relax_table[C (what, COND32)].rlx_length, | |
897 | md_relax_table[C (what, COND8)].rlx_length, | |
898 | C (what, 0), | |
899 | immediate.X_add_symbol, | |
900 | immediate.X_add_number, | |
901 | 0); | |
902 | p[high_byte] = (opcode->nibbles[0] << 4) | (opcode->nibbles[1]); | |
903 | } | |
904 | else if (opcode->arg[0] == A_BDISP12) | |
905 | { | |
906 | p = frag_var (rs_machine_dependent, | |
907 | md_relax_table[C (UNCOND_JUMP, UNCOND32)].rlx_length, | |
908 | md_relax_table[C (UNCOND_JUMP, UNCOND12)].rlx_length, | |
909 | C (UNCOND_JUMP, 0), | |
910 | immediate.X_add_symbol, | |
911 | immediate.X_add_number, | |
912 | 0); | |
913 | p[high_byte] = (opcode->nibbles[0] << 4); | |
914 | } | |
915 | ||
916 | } | |
917 | ||
918 | /* Now we know what sort of opcodes it is, lets build the bytes - | |
919 | */ | |
920 | static void | |
921 | build_Mytes (opcode, operand) | |
922 | sh_opcode_info *opcode; | |
923 | sh_operand_info *operand; | |
924 | ||
925 | { | |
926 | int index; | |
927 | char nbuf[4]; | |
928 | char *output = frag_more (2); | |
929 | int low_byte = target_big_endian ? 1 : 0; | |
930 | nbuf[0] = 0; | |
931 | nbuf[1] = 0; | |
932 | nbuf[2] = 0; | |
933 | nbuf[3] = 0; | |
934 | ||
935 | for (index = 0; index < 4; index++) | |
936 | { | |
937 | sh_nibble_type i = opcode->nibbles[index]; | |
938 | if (i < 16) | |
939 | { | |
940 | nbuf[index] = i; | |
941 | } | |
942 | else | |
943 | { | |
944 | switch (i) | |
945 | { | |
946 | case REG_N: | |
947 | nbuf[index] = reg_n; | |
948 | break; | |
949 | case REG_M: | |
950 | nbuf[index] = reg_m; | |
951 | break; | |
952 | case REG_NM: | |
953 | nbuf[index] = reg_n | (reg_m >> 2); | |
954 | break; | |
955 | case REG_B: | |
956 | nbuf[index] = reg_b | 0x08; | |
957 | break; | |
958 | case DISP_4: | |
959 | insert (output + low_byte, BFD_RELOC_SH_IMM4, 0); | |
960 | break; | |
961 | case IMM_4BY4: | |
962 | insert (output + low_byte, BFD_RELOC_SH_IMM4BY4, 0); | |
963 | break; | |
964 | case IMM_4BY2: | |
965 | insert (output + low_byte, BFD_RELOC_SH_IMM4BY2, 0); | |
966 | break; | |
967 | case IMM_4: | |
968 | insert (output + low_byte, BFD_RELOC_SH_IMM4, 0); | |
969 | break; | |
970 | case IMM_8BY4: | |
971 | insert (output + low_byte, BFD_RELOC_SH_IMM8BY4, 0); | |
972 | break; | |
973 | case IMM_8BY2: | |
974 | insert (output + low_byte, BFD_RELOC_SH_IMM8BY2, 0); | |
975 | break; | |
976 | case IMM_8: | |
977 | insert (output + low_byte, BFD_RELOC_SH_IMM8, 0); | |
978 | break; | |
979 | case PCRELIMM_8BY4: | |
980 | insert (output, BFD_RELOC_SH_PCRELIMM8BY4, 1); | |
981 | break; | |
982 | case PCRELIMM_8BY2: | |
983 | insert (output, BFD_RELOC_SH_PCRELIMM8BY2, 1); | |
984 | break; | |
985 | default: | |
986 | printf (_("failed for %d\n"), i); | |
987 | } | |
988 | } | |
989 | } | |
990 | if (! target_big_endian) { | |
991 | output[1] = (nbuf[0] << 4) | (nbuf[1]); | |
992 | output[0] = (nbuf[2] << 4) | (nbuf[3]); | |
993 | } | |
994 | else { | |
995 | output[0] = (nbuf[0] << 4) | (nbuf[1]); | |
996 | output[1] = (nbuf[2] << 4) | (nbuf[3]); | |
997 | } | |
998 | } | |
999 | ||
1000 | /* This is the guts of the machine-dependent assembler. STR points to a | |
1001 | machine dependent instruction. This function is supposed to emit | |
1002 | the frags/bytes it assembles to. | |
1003 | */ | |
1004 | ||
1005 | void | |
1006 | md_assemble (str) | |
1007 | char *str; | |
1008 | { | |
1009 | unsigned char *op_start; | |
1010 | unsigned char *op_end; | |
1011 | sh_operand_info operand[3]; | |
1012 | sh_opcode_info *opcode; | |
1013 | char name[20]; | |
1014 | int nlen = 0; | |
1015 | /* Drop leading whitespace */ | |
1016 | while (*str == ' ') | |
1017 | str++; | |
1018 | ||
1019 | /* find the op code end */ | |
1020 | for (op_start = op_end = (unsigned char *) (str); | |
1021 | *op_end | |
1022 | && nlen < 20 | |
1023 | && !is_end_of_line[*op_end] && *op_end != ' '; | |
1024 | op_end++) | |
1025 | { | |
1026 | unsigned char c = op_start[nlen]; | |
1027 | ||
1028 | /* The machine independent code will convert CMP/EQ into cmp/EQ | |
1029 | because it thinks the '/' is the end of the symbol. Instead of | |
1030 | hacking up the machine independent code, we just deal with it | |
1031 | here. */ | |
1032 | c = isupper (c) ? tolower (c) : c; | |
1033 | name[nlen] = c; | |
1034 | nlen++; | |
1035 | } | |
1036 | name[nlen] = 0; | |
1037 | ||
1038 | if (nlen == 0) | |
1039 | { | |
1040 | as_bad (_("can't find opcode ")); | |
1041 | } | |
1042 | ||
1043 | opcode = (sh_opcode_info *) hash_find (opcode_hash_control, name); | |
1044 | ||
1045 | if (opcode == NULL) | |
1046 | { | |
1047 | as_bad (_("unknown opcode")); | |
1048 | return; | |
1049 | } | |
1050 | ||
1051 | if (sh_relax | |
1052 | && ! seg_info (now_seg)->tc_segment_info_data.in_code) | |
1053 | { | |
1054 | /* Output a CODE reloc to tell the linker that the following | |
1055 | bytes are instructions, not data. */ | |
1056 | fix_new (frag_now, frag_now_fix (), 2, &abs_symbol, 0, 0, | |
1057 | BFD_RELOC_SH_CODE); | |
1058 | seg_info (now_seg)->tc_segment_info_data.in_code = 1; | |
1059 | } | |
1060 | ||
1061 | if (opcode->arg[0] == A_BDISP12 | |
1062 | || opcode->arg[0] == A_BDISP8) | |
1063 | { | |
1064 | parse_exp (op_end + 1); | |
1065 | build_relax (opcode); | |
1066 | } | |
1067 | else | |
1068 | { | |
1069 | if (opcode->arg[0] != A_END) | |
1070 | { | |
1071 | get_operands (opcode, op_end, operand); | |
1072 | } | |
1073 | opcode = get_specific (opcode, operand); | |
1074 | ||
1075 | if (opcode == 0) | |
1076 | { | |
1077 | /* Couldn't find an opcode which matched the operands */ | |
1078 | char *where = frag_more (2); | |
1079 | ||
1080 | where[0] = 0x0; | |
1081 | where[1] = 0x0; | |
1082 | as_bad (_("invalid operands for opcode")); | |
1083 | return; | |
1084 | } | |
1085 | ||
1086 | build_Mytes (opcode, operand); | |
1087 | } | |
1088 | ||
1089 | } | |
1090 | ||
1091 | /* This routine is called each time a label definition is seen. It | |
1092 | emits a BFD_RELOC_SH_LABEL reloc if necessary. */ | |
1093 | ||
1094 | void | |
1095 | sh_frob_label () | |
1096 | { | |
1097 | static fragS *last_label_frag; | |
1098 | static int last_label_offset; | |
1099 | ||
1100 | if (sh_relax | |
1101 | && seg_info (now_seg)->tc_segment_info_data.in_code) | |
1102 | { | |
1103 | int offset; | |
1104 | ||
1105 | offset = frag_now_fix (); | |
1106 | if (frag_now != last_label_frag | |
1107 | || offset != last_label_offset) | |
1108 | { | |
1109 | fix_new (frag_now, offset, 2, &abs_symbol, 0, 0, BFD_RELOC_SH_LABEL); | |
1110 | last_label_frag = frag_now; | |
1111 | last_label_offset = offset; | |
1112 | } | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | /* This routine is called when the assembler is about to output some | |
1117 | data. It emits a BFD_RELOC_SH_DATA reloc if necessary. */ | |
1118 | ||
1119 | void | |
1120 | sh_flush_pending_output () | |
1121 | { | |
1122 | if (sh_relax | |
1123 | && seg_info (now_seg)->tc_segment_info_data.in_code) | |
1124 | { | |
1125 | fix_new (frag_now, frag_now_fix (), 2, &abs_symbol, 0, 0, | |
1126 | BFD_RELOC_SH_DATA); | |
1127 | seg_info (now_seg)->tc_segment_info_data.in_code = 0; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | symbolS * | |
1132 | DEFUN (md_undefined_symbol, (name), | |
1133 | char *name) | |
1134 | { | |
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | #ifdef OBJ_COFF | |
1139 | ||
1140 | void | |
1141 | DEFUN (tc_crawl_symbol_chain, (headers), | |
1142 | object_headers * headers) | |
1143 | { | |
1144 | printf (_("call to tc_crawl_symbol_chain \n")); | |
1145 | } | |
1146 | ||
1147 | void | |
1148 | DEFUN (tc_headers_hook, (headers), | |
1149 | object_headers * headers) | |
1150 | { | |
1151 | printf (_("call to tc_headers_hook \n")); | |
1152 | } | |
1153 | ||
1154 | #endif | |
1155 | ||
1156 | /* Various routines to kill one day */ | |
1157 | /* Equal to MAX_PRECISION in atof-ieee.c */ | |
1158 | #define MAX_LITTLENUMS 6 | |
1159 | ||
1160 | /* Turn a string in input_line_pointer into a floating point constant of type | |
1161 | type, and store the appropriate bytes in *litP. The number of LITTLENUMS | |
1162 | emitted is stored in *sizeP . An error message is returned, or NULL on OK. | |
1163 | */ | |
1164 | char * | |
1165 | md_atof (type, litP, sizeP) | |
1166 | int type; | |
1167 | char *litP; | |
1168 | int *sizeP; | |
1169 | { | |
1170 | int prec; | |
1171 | LITTLENUM_TYPE words[4]; | |
1172 | char *t; | |
1173 | int i; | |
1174 | ||
1175 | switch (type) | |
1176 | { | |
1177 | case 'f': | |
1178 | prec = 2; | |
1179 | break; | |
1180 | ||
1181 | case 'd': | |
1182 | prec = 4; | |
1183 | break; | |
1184 | ||
1185 | default: | |
1186 | *sizeP = 0; | |
1187 | return _("bad call to md_atof"); | |
1188 | } | |
1189 | ||
1190 | t = atof_ieee (input_line_pointer, type, words); | |
1191 | if (t) | |
1192 | input_line_pointer = t; | |
1193 | ||
1194 | *sizeP = prec * 2; | |
1195 | ||
1196 | if (! target_big_endian) | |
1197 | { | |
1198 | for (i = prec - 1; i >= 0; i--) | |
1199 | { | |
1200 | md_number_to_chars (litP, (valueT) words[i], 2); | |
1201 | litP += 2; | |
1202 | } | |
1203 | } | |
1204 | else | |
1205 | { | |
1206 | for (i = 0; i < prec; i++) | |
1207 | { | |
1208 | md_number_to_chars (litP, (valueT) words[i], 2); | |
1209 | litP += 2; | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | return NULL; | |
1214 | } | |
1215 | ||
1216 | /* Handle the .uses pseudo-op. This pseudo-op is used just before a | |
1217 | call instruction. It refers to a label of the instruction which | |
1218 | loads the register which the call uses. We use it to generate a | |
1219 | special reloc for the linker. */ | |
1220 | ||
1221 | static void | |
1222 | s_uses (ignore) | |
1223 | int ignore; | |
1224 | { | |
1225 | expressionS ex; | |
1226 | ||
1227 | if (! sh_relax) | |
1228 | as_warn (_(".uses pseudo-op seen when not relaxing")); | |
1229 | ||
1230 | expression (&ex); | |
1231 | ||
1232 | if (ex.X_op != O_symbol || ex.X_add_number != 0) | |
1233 | { | |
1234 | as_bad (_("bad .uses format")); | |
1235 | ignore_rest_of_line (); | |
1236 | return; | |
1237 | } | |
1238 | ||
1239 | fix_new_exp (frag_now, frag_now_fix (), 2, &ex, 1, BFD_RELOC_SH_USES); | |
1240 | ||
1241 | demand_empty_rest_of_line (); | |
1242 | } | |
1243 | \f | |
1244 | CONST char *md_shortopts = ""; | |
1245 | struct option md_longopts[] = { | |
1246 | ||
1247 | #define OPTION_RELAX (OPTION_MD_BASE) | |
1248 | #define OPTION_LITTLE (OPTION_MD_BASE + 1) | |
1249 | #define OPTION_SMALL (OPTION_LITTLE + 1) | |
1250 | ||
1251 | {"relax", no_argument, NULL, OPTION_RELAX}, | |
1252 | {"little", no_argument, NULL, OPTION_LITTLE}, | |
1253 | {"small", no_argument, NULL, OPTION_SMALL}, | |
1254 | {NULL, no_argument, NULL, 0} | |
1255 | }; | |
1256 | size_t md_longopts_size = sizeof(md_longopts); | |
1257 | ||
1258 | int | |
1259 | md_parse_option (c, arg) | |
1260 | int c; | |
1261 | char *arg; | |
1262 | { | |
1263 | switch (c) | |
1264 | { | |
1265 | case OPTION_RELAX: | |
1266 | sh_relax = 1; | |
1267 | break; | |
1268 | ||
1269 | case OPTION_LITTLE: | |
1270 | shl = 1; | |
1271 | target_big_endian = 0; | |
1272 | break; | |
1273 | ||
1274 | case OPTION_SMALL: | |
1275 | sh_small = 1; | |
1276 | break; | |
1277 | ||
1278 | default: | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | return 1; | |
1283 | } | |
1284 | ||
1285 | void | |
1286 | md_show_usage (stream) | |
1287 | FILE *stream; | |
1288 | { | |
1289 | fprintf(stream, _("\ | |
1290 | SH options:\n\ | |
1291 | -little generate little endian code\n\ | |
1292 | -relax alter jump instructions for long displacements\n\ | |
1293 | -small align sections to 4 byte boundaries, not 16\n")); | |
1294 | } | |
1295 | \f | |
1296 | void | |
1297 | tc_Nout_fix_to_chars () | |
1298 | { | |
1299 | printf (_("call to tc_Nout_fix_to_chars \n")); | |
1300 | abort (); | |
1301 | } | |
1302 | ||
1303 | /* This struct is used to pass arguments to sh_count_relocs through | |
1304 | bfd_map_over_sections. */ | |
1305 | ||
1306 | struct sh_count_relocs | |
1307 | { | |
1308 | /* Symbol we are looking for. */ | |
1309 | symbolS *sym; | |
1310 | /* Count of relocs found. */ | |
1311 | int count; | |
1312 | }; | |
1313 | ||
1314 | /* Count the number of fixups in a section which refer to a particular | |
1315 | symbol. When using BFD_ASSEMBLER, this is called via | |
1316 | bfd_map_over_sections. */ | |
1317 | ||
1318 | /*ARGSUSED*/ | |
1319 | static void | |
1320 | sh_count_relocs (abfd, sec, data) | |
1321 | bfd *abfd; | |
1322 | segT sec; | |
1323 | PTR data; | |
1324 | { | |
1325 | struct sh_count_relocs *info = (struct sh_count_relocs *) data; | |
1326 | segment_info_type *seginfo; | |
1327 | symbolS *sym; | |
1328 | fixS *fix; | |
1329 | ||
1330 | seginfo = seg_info (sec); | |
1331 | if (seginfo == NULL) | |
1332 | return; | |
1333 | ||
1334 | sym = info->sym; | |
1335 | for (fix = seginfo->fix_root; fix != NULL; fix = fix->fx_next) | |
1336 | { | |
1337 | if (fix->fx_addsy == sym) | |
1338 | { | |
1339 | ++info->count; | |
1340 | fix->fx_tcbit = 1; | |
1341 | } | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | /* Handle the count relocs for a particular section. When using | |
1346 | BFD_ASSEMBLER, this is called via bfd_map_over_sections. */ | |
1347 | ||
1348 | /*ARGSUSED*/ | |
1349 | static void | |
1350 | sh_frob_section (abfd, sec, ignore) | |
1351 | bfd *abfd; | |
1352 | segT sec; | |
1353 | PTR ignore; | |
1354 | { | |
1355 | segment_info_type *seginfo; | |
1356 | fixS *fix; | |
1357 | ||
1358 | seginfo = seg_info (sec); | |
1359 | if (seginfo == NULL) | |
1360 | return; | |
1361 | ||
1362 | for (fix = seginfo->fix_root; fix != NULL; fix = fix->fx_next) | |
1363 | { | |
1364 | symbolS *sym; | |
1365 | bfd_vma val; | |
1366 | fixS *fscan; | |
1367 | struct sh_count_relocs info; | |
1368 | ||
1369 | if (fix->fx_r_type != BFD_RELOC_SH_USES) | |
1370 | continue; | |
1371 | ||
1372 | /* The BFD_RELOC_SH_USES reloc should refer to a defined local | |
1373 | symbol in the same section. */ | |
1374 | sym = fix->fx_addsy; | |
1375 | if (sym == NULL | |
1376 | || fix->fx_subsy != NULL | |
1377 | || fix->fx_addnumber != 0 | |
1378 | || S_GET_SEGMENT (sym) != sec | |
1379 | #if ! defined (BFD_ASSEMBLER) && defined (OBJ_COFF) | |
1380 | || S_GET_STORAGE_CLASS (sym) == C_EXT | |
1381 | #endif | |
1382 | || S_IS_EXTERNAL (sym)) | |
1383 | { | |
1384 | as_warn_where (fix->fx_file, fix->fx_line, | |
1385 | _(".uses does not refer to a local symbol in the same section")); | |
1386 | continue; | |
1387 | } | |
1388 | ||
1389 | /* Look through the fixups again, this time looking for one | |
1390 | at the same location as sym. */ | |
1391 | val = S_GET_VALUE (sym); | |
1392 | for (fscan = seginfo->fix_root; | |
1393 | fscan != NULL; | |
1394 | fscan = fscan->fx_next) | |
1395 | if (val == fscan->fx_frag->fr_address + fscan->fx_where | |
1396 | && fscan->fx_r_type != BFD_RELOC_SH_ALIGN | |
1397 | && fscan->fx_r_type != BFD_RELOC_SH_CODE | |
1398 | && fscan->fx_r_type != BFD_RELOC_SH_DATA | |
1399 | && fscan->fx_r_type != BFD_RELOC_SH_LABEL) | |
1400 | break; | |
1401 | if (fscan == NULL) | |
1402 | { | |
1403 | as_warn_where (fix->fx_file, fix->fx_line, | |
1404 | _("can't find fixup pointed to by .uses")); | |
1405 | continue; | |
1406 | } | |
1407 | ||
1408 | if (fscan->fx_tcbit) | |
1409 | { | |
1410 | /* We've already done this one. */ | |
1411 | continue; | |
1412 | } | |
1413 | ||
1414 | /* fscan should also be a fixup to a local symbol in the same | |
1415 | section. */ | |
1416 | sym = fscan->fx_addsy; | |
1417 | if (sym == NULL | |
1418 | || fscan->fx_subsy != NULL | |
1419 | || fscan->fx_addnumber != 0 | |
1420 | || S_GET_SEGMENT (sym) != sec | |
1421 | #if ! defined (BFD_ASSEMBLER) && defined (OBJ_COFF) | |
1422 | || S_GET_STORAGE_CLASS (sym) == C_EXT | |
1423 | #endif | |
1424 | || S_IS_EXTERNAL (sym)) | |
1425 | { | |
1426 | as_warn_where (fix->fx_file, fix->fx_line, | |
1427 | _(".uses target does not refer to a local symbol in the same section")); | |
1428 | continue; | |
1429 | } | |
1430 | ||
1431 | /* Now we look through all the fixups of all the sections, | |
1432 | counting the number of times we find a reference to sym. */ | |
1433 | info.sym = sym; | |
1434 | info.count = 0; | |
1435 | #ifdef BFD_ASSEMBLER | |
1436 | bfd_map_over_sections (stdoutput, sh_count_relocs, (PTR) &info); | |
1437 | #else | |
1438 | { | |
1439 | int iscan; | |
1440 | ||
1441 | for (iscan = SEG_E0; iscan < SEG_UNKNOWN; iscan++) | |
1442 | sh_count_relocs ((bfd *) NULL, iscan, (PTR) &info); | |
1443 | } | |
1444 | #endif | |
1445 | ||
1446 | if (info.count < 1) | |
1447 | abort (); | |
1448 | ||
1449 | /* Generate a BFD_RELOC_SH_COUNT fixup at the location of sym. | |
1450 | We have already adjusted the value of sym to include the | |
1451 | fragment address, so we undo that adjustment here. */ | |
1452 | subseg_change (sec, 0); | |
1453 | fix_new (sym->sy_frag, S_GET_VALUE (sym) - sym->sy_frag->fr_address, | |
1454 | 4, &abs_symbol, info.count, 0, BFD_RELOC_SH_COUNT); | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | /* This function is called after the symbol table has been completed, | |
1459 | but before the relocs or section contents have been written out. | |
1460 | If we have seen any .uses pseudo-ops, they point to an instruction | |
1461 | which loads a register with the address of a function. We look | |
1462 | through the fixups to find where the function address is being | |
1463 | loaded from. We then generate a COUNT reloc giving the number of | |
1464 | times that function address is referred to. The linker uses this | |
1465 | information when doing relaxing, to decide when it can eliminate | |
1466 | the stored function address entirely. */ | |
1467 | ||
1468 | void | |
1469 | sh_frob_file () | |
1470 | { | |
1471 | if (! sh_relax) | |
1472 | return; | |
1473 | ||
1474 | #ifdef BFD_ASSEMBLER | |
1475 | bfd_map_over_sections (stdoutput, sh_frob_section, (PTR) NULL); | |
1476 | #else | |
1477 | { | |
1478 | int iseg; | |
1479 | ||
1480 | for (iseg = SEG_E0; iseg < SEG_UNKNOWN; iseg++) | |
1481 | sh_frob_section ((bfd *) NULL, iseg, (PTR) NULL); | |
1482 | } | |
1483 | #endif | |
1484 | } | |
1485 | ||
1486 | /* Called after relaxing. Set the correct sizes of the fragments, and | |
1487 | create relocs so that md_apply_fix will fill in the correct values. */ | |
1488 | ||
1489 | void | |
1490 | md_convert_frag (headers, seg, fragP) | |
1491 | #ifdef BFD_ASSEMBLER | |
1492 | bfd *headers; | |
1493 | #else | |
1494 | object_headers *headers; | |
1495 | #endif | |
1496 | segT seg; | |
1497 | fragS *fragP; | |
1498 | { | |
1499 | int donerelax = 0; | |
1500 | ||
1501 | switch (fragP->fr_subtype) | |
1502 | { | |
1503 | case C (COND_JUMP, COND8): | |
1504 | case C (COND_JUMP_DELAY, COND8): | |
1505 | subseg_change (seg, 0); | |
1506 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, fragP->fr_offset, | |
1507 | 1, BFD_RELOC_SH_PCDISP8BY2); | |
1508 | fragP->fr_fix += 2; | |
1509 | fragP->fr_var = 0; | |
1510 | break; | |
1511 | ||
1512 | case C (UNCOND_JUMP, UNCOND12): | |
1513 | subseg_change (seg, 0); | |
1514 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, fragP->fr_offset, | |
1515 | 1, BFD_RELOC_SH_PCDISP12BY2); | |
1516 | fragP->fr_fix += 2; | |
1517 | fragP->fr_var = 0; | |
1518 | break; | |
1519 | ||
1520 | case C (UNCOND_JUMP, UNCOND32): | |
1521 | case C (UNCOND_JUMP, UNDEF_WORD_DISP): | |
1522 | if (fragP->fr_symbol == NULL) | |
1523 | as_bad (_("at 0x%lx, displacement overflows 12-bit field"), | |
1524 | (unsigned long) fragP->fr_address); | |
1525 | else if (S_IS_DEFINED (fragP->fr_symbol)) | |
1526 | as_bad (_("at 0x%lx, displacement to defined symbol %s overflows 12-bit field"), | |
1527 | (unsigned long) fragP->fr_address, | |
1528 | S_GET_NAME (fragP->fr_symbol)); | |
1529 | else | |
1530 | as_bad (_("at 0x%lx, displacement to undefined symbol %s overflows 12-bit field"), | |
1531 | (unsigned long) fragP->fr_address, | |
1532 | S_GET_NAME (fragP->fr_symbol)); | |
1533 | ||
1534 | #if 0 /* This code works, but generates poor code and the compiler | |
1535 | should never produce a sequence that requires it to be used. */ | |
1536 | ||
1537 | /* A jump wont fit in 12 bits, make code which looks like | |
1538 | bra foo | |
1539 | mov.w @(0, PC), r14 | |
1540 | .long disp | |
1541 | foo: bra @r14 | |
1542 | */ | |
1543 | int t = buffer[0] & 0x10; | |
1544 | ||
1545 | buffer[highbyte] = 0xa0; /* branch over move and disp */ | |
1546 | buffer[lowbyte] = 3; | |
1547 | buffer[highbyte+2] = 0xd0 | JREG; /* Build mov insn */ | |
1548 | buffer[lowbyte+2] = 0x00; | |
1549 | ||
1550 | buffer[highbyte+4] = 0; /* space for 32 bit jump disp */ | |
1551 | buffer[lowbyte+4] = 0; | |
1552 | buffer[highbyte+6] = 0; | |
1553 | buffer[lowbyte+6] = 0; | |
1554 | ||
1555 | buffer[highbyte+8] = 0x40 | JREG; /* Build jmp @JREG */ | |
1556 | buffer[lowbyte+8] = t ? 0xb : 0x2b; | |
1557 | ||
1558 | buffer[highbyte+10] = 0x20; /* build nop */ | |
1559 | buffer[lowbyte+10] = 0x0b; | |
1560 | ||
1561 | /* Make reloc for the long disp */ | |
1562 | fix_new (fragP, | |
1563 | fragP->fr_fix + 4, | |
1564 | 4, | |
1565 | fragP->fr_symbol, | |
1566 | fragP->fr_offset, | |
1567 | 0, | |
1568 | BFD_RELOC_32); | |
1569 | fragP->fr_fix += UNCOND32_LENGTH; | |
1570 | fragP->fr_var = 0; | |
1571 | donerelax = 1; | |
1572 | #endif | |
1573 | ||
1574 | break; | |
1575 | ||
1576 | case C (COND_JUMP, COND12): | |
1577 | case C (COND_JUMP_DELAY, COND12): | |
1578 | /* A bcond won't fit, so turn it into a b!cond; bra disp; nop */ | |
1579 | /* I found that a relax failure for gcc.c-torture/execute/930628-1.c | |
1580 | was due to gas incorrectly relaxing an out-of-range conditional | |
1581 | branch with delay slot. It turned: | |
1582 | bf.s L6 (slot mov.l r12,@(44,r0)) | |
1583 | into: | |
1584 | ||
1585 | 2c: 8f 01 a0 8b bf.s 32 <_main+32> (slot bra L6) | |
1586 | 30: 00 09 nop | |
1587 | 32: 10 cb mov.l r12,@(44,r0) | |
1588 | Therefore, branches with delay slots have to be handled | |
1589 | differently from ones without delay slots. */ | |
1590 | { | |
1591 | unsigned char *buffer = | |
1592 | (unsigned char *) (fragP->fr_fix + fragP->fr_literal); | |
1593 | int highbyte = target_big_endian ? 0 : 1; | |
1594 | int lowbyte = target_big_endian ? 1 : 0; | |
1595 | int delay = fragP->fr_subtype == C (COND_JUMP_DELAY, COND12); | |
1596 | ||
1597 | /* Toggle the true/false bit of the bcond. */ | |
1598 | buffer[highbyte] ^= 0x2; | |
1599 | ||
1600 | /* If this is a dalayed branch, we may not put the the bra in the | |
1601 | slot. So we change it to a non-delayed branch, like that: | |
1602 | b! cond slot_label; bra disp; slot_label: slot_insn | |
1603 | ??? We should try if swapping the conditional branch and | |
1604 | its delay-slot insn already makes the branch reach. */ | |
1605 | ||
1606 | /* Build a relocation to six / four bytes farther on. */ | |
1607 | subseg_change (seg, 0); | |
1608 | fix_new (fragP, fragP->fr_fix, 2, | |
1609 | #ifdef BFD_ASSEMBLER | |
1610 | section_symbol (seg), | |
1611 | #else | |
1612 | seg_info (seg)->dot, | |
1613 | #endif | |
1614 | fragP->fr_address + fragP->fr_fix + (delay ? 4 : 6), | |
1615 | 1, BFD_RELOC_SH_PCDISP8BY2); | |
1616 | ||
1617 | /* Set up a jump instruction. */ | |
1618 | buffer[highbyte + 2] = 0xa0; | |
1619 | buffer[lowbyte + 2] = 0; | |
1620 | fix_new (fragP, fragP->fr_fix + 2, 2, fragP->fr_symbol, | |
1621 | fragP->fr_offset, 1, BFD_RELOC_SH_PCDISP12BY2); | |
1622 | ||
1623 | if (delay) | |
1624 | { | |
1625 | buffer[highbyte] &= ~0x4; /* Removes delay slot from branch. */ | |
1626 | fragP->fr_fix += 4; | |
1627 | } | |
1628 | else | |
1629 | { | |
1630 | /* Fill in a NOP instruction. */ | |
1631 | buffer[highbyte + 4] = 0x0; | |
1632 | buffer[lowbyte + 4] = 0x9; | |
1633 | ||
1634 | fragP->fr_fix += 6; | |
1635 | } | |
1636 | fragP->fr_var = 0; | |
1637 | donerelax = 1; | |
1638 | } | |
1639 | break; | |
1640 | ||
1641 | case C (COND_JUMP, COND32): | |
1642 | case C (COND_JUMP_DELAY, COND32): | |
1643 | case C (COND_JUMP, UNDEF_WORD_DISP): | |
1644 | case C (COND_JUMP_DELAY, UNDEF_WORD_DISP): | |
1645 | if (fragP->fr_symbol == NULL) | |
1646 | as_bad (_("at 0x%lx, displacement overflows 8-bit field"), | |
1647 | (unsigned long) fragP->fr_address); | |
1648 | else if (S_IS_DEFINED (fragP->fr_symbol)) | |
1649 | as_bad (_("at 0x%lx, displacement to defined symbol %s overflows 8-bit field "), | |
1650 | (unsigned long) fragP->fr_address, | |
1651 | S_GET_NAME (fragP->fr_symbol)); | |
1652 | else | |
1653 | as_bad (_("at 0x%lx, displacement to undefined symbol %s overflows 8-bit field "), | |
1654 | (unsigned long) fragP->fr_address, | |
1655 | S_GET_NAME (fragP->fr_symbol)); | |
1656 | ||
1657 | #if 0 /* This code works, but generates poor code, and the compiler | |
1658 | should never produce a sequence that requires it to be used. */ | |
1659 | ||
1660 | /* A bcond won't fit and it won't go into a 12 bit | |
1661 | displacement either, the code sequence looks like: | |
1662 | b!cond foop | |
1663 | mov.w @(n, PC), r14 | |
1664 | jmp @r14 | |
1665 | nop | |
1666 | .long where | |
1667 | foop: | |
1668 | */ | |
1669 | ||
1670 | buffer[0] ^= 0x2; /* Toggle T/F bit */ | |
1671 | #define JREG 14 | |
1672 | buffer[1] = 5; /* branch over mov, jump, nop and ptr */ | |
1673 | buffer[2] = 0xd0 | JREG; /* Build mov insn */ | |
1674 | buffer[3] = 0x2; | |
1675 | buffer[4] = 0x40 | JREG; /* Build jmp @JREG */ | |
1676 | buffer[5] = 0x0b; | |
1677 | buffer[6] = 0x20; /* build nop */ | |
1678 | buffer[7] = 0x0b; | |
1679 | buffer[8] = 0; /* space for 32 bit jump disp */ | |
1680 | buffer[9] = 0; | |
1681 | buffer[10] = 0; | |
1682 | buffer[11] = 0; | |
1683 | buffer[12] = 0; | |
1684 | buffer[13] = 0; | |
1685 | /* Make reloc for the long disp */ | |
1686 | fix_new (fragP, | |
1687 | fragP->fr_fix + 8, | |
1688 | 4, | |
1689 | fragP->fr_symbol, | |
1690 | fragP->fr_offset, | |
1691 | 0, | |
1692 | BFD_RELOC_32); | |
1693 | fragP->fr_fix += COND32_LENGTH; | |
1694 | fragP->fr_var = 0; | |
1695 | donerelax = 1; | |
1696 | #endif | |
1697 | ||
1698 | break; | |
1699 | ||
1700 | default: | |
1701 | abort (); | |
1702 | } | |
1703 | ||
1704 | if (donerelax && !sh_relax) | |
1705 | as_warn_where (fragP->fr_file, fragP->fr_line, | |
1706 | _("overflow in branch to %s; converted into longer instruction sequence"), | |
1707 | (fragP->fr_symbol != NULL | |
1708 | ? S_GET_NAME (fragP->fr_symbol) | |
1709 | : "")); | |
1710 | } | |
1711 | ||
1712 | valueT | |
1713 | DEFUN (md_section_align, (seg, size), | |
1714 | segT seg AND | |
1715 | valueT size) | |
1716 | { | |
1717 | #ifdef BFD_ASSEMBLER | |
1718 | #ifdef OBJ_ELF | |
1719 | return size; | |
1720 | #else /* ! OBJ_ELF */ | |
1721 | return ((size + (1 << bfd_get_section_alignment (stdoutput, seg)) - 1) | |
1722 | & (-1 << bfd_get_section_alignment (stdoutput, seg))); | |
1723 | #endif /* ! OBJ_ELF */ | |
1724 | #else /* ! BFD_ASSEMBLER */ | |
1725 | return ((size + (1 << section_alignment[(int) seg]) - 1) | |
1726 | & (-1 << section_alignment[(int) seg])); | |
1727 | #endif /* ! BFD_ASSEMBLER */ | |
1728 | } | |
1729 | ||
1730 | /* This static variable is set by s_uacons to tell sh_cons_align that | |
1731 | the expession does not need to be aligned. */ | |
1732 | ||
1733 | static int sh_no_align_cons = 0; | |
1734 | ||
1735 | /* This handles the unaligned space allocation pseudo-ops, such as | |
1736 | .uaword. .uaword is just like .word, but the value does not need | |
1737 | to be aligned. */ | |
1738 | ||
1739 | static void | |
1740 | s_uacons (bytes) | |
1741 | int bytes; | |
1742 | { | |
1743 | /* Tell sh_cons_align not to align this value. */ | |
1744 | sh_no_align_cons = 1; | |
1745 | cons (bytes); | |
1746 | } | |
1747 | ||
1748 | /* If a .word, et. al., pseud-op is seen, warn if the value is not | |
1749 | aligned correctly. Note that this can cause warnings to be issued | |
1750 | when assembling initialized structured which were declared with the | |
1751 | packed attribute. FIXME: Perhaps we should require an option to | |
1752 | enable this warning? */ | |
1753 | ||
1754 | void | |
1755 | sh_cons_align (nbytes) | |
1756 | int nbytes; | |
1757 | { | |
1758 | int nalign; | |
1759 | char *p; | |
1760 | ||
1761 | if (sh_no_align_cons) | |
1762 | { | |
1763 | /* This is an unaligned pseudo-op. */ | |
1764 | sh_no_align_cons = 0; | |
1765 | return; | |
1766 | } | |
1767 | ||
1768 | nalign = 0; | |
1769 | while ((nbytes & 1) == 0) | |
1770 | { | |
1771 | ++nalign; | |
1772 | nbytes >>= 1; | |
1773 | } | |
1774 | ||
1775 | if (nalign == 0) | |
1776 | return; | |
1777 | ||
1778 | if (now_seg == absolute_section) | |
1779 | { | |
1780 | if ((abs_section_offset & ((1 << nalign) - 1)) != 0) | |
1781 | as_warn (_("misaligned data")); | |
1782 | return; | |
1783 | } | |
1784 | ||
1785 | p = frag_var (rs_align_code, 1, 1, (relax_substateT) 0, | |
1786 | (symbolS *) NULL, (offsetT) nalign, (char *) NULL); | |
1787 | ||
1788 | record_alignment (now_seg, nalign); | |
1789 | } | |
1790 | ||
1791 | /* When relaxing, we need to output a reloc for any .align directive | |
1792 | that requests alignment to a four byte boundary or larger. This is | |
1793 | also where we check for misaligned data. */ | |
1794 | ||
1795 | void | |
1796 | sh_handle_align (frag) | |
1797 | fragS *frag; | |
1798 | { | |
1799 | if (sh_relax | |
1800 | && frag->fr_type == rs_align | |
1801 | && frag->fr_address + frag->fr_fix > 0 | |
1802 | && frag->fr_offset > 1 | |
1803 | && now_seg != bss_section) | |
1804 | fix_new (frag, frag->fr_fix, 2, &abs_symbol, frag->fr_offset, 0, | |
1805 | BFD_RELOC_SH_ALIGN); | |
1806 | ||
1807 | if (frag->fr_type == rs_align_code | |
1808 | && frag->fr_next->fr_address - frag->fr_address - frag->fr_fix != 0) | |
1809 | as_warn_where (frag->fr_file, frag->fr_line, _("misaligned data")); | |
1810 | } | |
1811 | ||
1812 | /* This macro decides whether a particular reloc is an entry in a | |
1813 | switch table. It is used when relaxing, because the linker needs | |
1814 | to know about all such entries so that it can adjust them if | |
1815 | necessary. */ | |
1816 | ||
1817 | #ifdef BFD_ASSEMBLER | |
1818 | #define SWITCH_TABLE_CONS(fix) (0) | |
1819 | #else | |
1820 | #define SWITCH_TABLE_CONS(fix) \ | |
1821 | ((fix)->fx_r_type == 0 \ | |
1822 | && ((fix)->fx_size == 2 \ | |
1823 | || (fix)->fx_size == 1 \ | |
1824 | || (fix)->fx_size == 4)) | |
1825 | #endif | |
1826 | ||
1827 | #define SWITCH_TABLE(fix) \ | |
1828 | ((fix)->fx_addsy != NULL \ | |
1829 | && (fix)->fx_subsy != NULL \ | |
1830 | && S_GET_SEGMENT ((fix)->fx_addsy) == text_section \ | |
1831 | && S_GET_SEGMENT ((fix)->fx_subsy) == text_section \ | |
1832 | && ((fix)->fx_r_type == BFD_RELOC_32 \ | |
1833 | || (fix)->fx_r_type == BFD_RELOC_16 \ | |
1834 | || (fix)->fx_r_type == BFD_RELOC_8 \ | |
1835 | || SWITCH_TABLE_CONS (fix))) | |
1836 | ||
1837 | /* See whether we need to force a relocation into the output file. | |
1838 | This is used to force out switch and PC relative relocations when | |
1839 | relaxing. */ | |
1840 | ||
1841 | int | |
1842 | sh_force_relocation (fix) | |
1843 | fixS *fix; | |
1844 | { | |
1845 | ||
1846 | if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
1847 | || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
1848 | return 1; | |
1849 | ||
1850 | if (! sh_relax) | |
1851 | return 0; | |
1852 | ||
1853 | return (fix->fx_pcrel | |
1854 | || SWITCH_TABLE (fix) | |
1855 | || fix->fx_r_type == BFD_RELOC_SH_COUNT | |
1856 | || fix->fx_r_type == BFD_RELOC_SH_ALIGN | |
1857 | || fix->fx_r_type == BFD_RELOC_SH_CODE | |
1858 | || fix->fx_r_type == BFD_RELOC_SH_DATA | |
1859 | || fix->fx_r_type == BFD_RELOC_SH_LABEL); | |
1860 | } | |
1861 | ||
1862 | #ifdef OBJ_ELF | |
1863 | boolean | |
1864 | sh_fix_adjustable (fixP) | |
1865 | fixS *fixP; | |
1866 | { | |
1867 | ||
1868 | if (fixP->fx_addsy == NULL) | |
1869 | return 1; | |
1870 | ||
1871 | /* We need the symbol name for the VTABLE entries */ | |
1872 | if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
1873 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
1874 | return 0; | |
1875 | ||
1876 | return 1; | |
1877 | } | |
1878 | #endif | |
1879 | ||
1880 | /* Apply a fixup to the object file. */ | |
1881 | ||
1882 | #ifdef BFD_ASSEMBLER | |
1883 | int | |
1884 | md_apply_fix (fixP, valp) | |
1885 | fixS *fixP; | |
1886 | valueT *valp; | |
1887 | #else | |
1888 | void | |
1889 | md_apply_fix (fixP, val) | |
1890 | fixS *fixP; | |
1891 | long val; | |
1892 | #endif | |
1893 | { | |
1894 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
1895 | int lowbyte = target_big_endian ? 1 : 0; | |
1896 | int highbyte = target_big_endian ? 0 : 1; | |
1897 | #ifdef BFD_ASSEMBLER | |
1898 | long val = *valp; | |
1899 | #endif | |
1900 | long max, min; | |
1901 | int shift; | |
1902 | ||
1903 | #ifdef BFD_ASSEMBLER | |
1904 | /* adjust_reloc_syms won't convert a reloc against a weak symbol | |
1905 | into a reloc against a section, but bfd_install_relocation will | |
1906 | screw up if the symbol is defined, so we have to adjust val here | |
1907 | to avoid the screw up later. */ | |
1908 | if (fixP->fx_addsy != NULL | |
1909 | && S_IS_WEAK (fixP->fx_addsy)) | |
1910 | val -= S_GET_VALUE (fixP->fx_addsy); | |
1911 | #endif | |
1912 | ||
1913 | #ifndef BFD_ASSEMBLER | |
1914 | if (fixP->fx_r_type == 0) | |
1915 | { | |
1916 | if (fixP->fx_size == 2) | |
1917 | fixP->fx_r_type = BFD_RELOC_16; | |
1918 | else if (fixP->fx_size == 4) | |
1919 | fixP->fx_r_type = BFD_RELOC_32; | |
1920 | else if (fixP->fx_size == 1) | |
1921 | fixP->fx_r_type = BFD_RELOC_8; | |
1922 | else | |
1923 | abort (); | |
1924 | } | |
1925 | #endif | |
1926 | ||
1927 | max = min = 0; | |
1928 | shift = 0; | |
1929 | switch (fixP->fx_r_type) | |
1930 | { | |
1931 | case BFD_RELOC_SH_IMM4: | |
1932 | max = 0xf; | |
1933 | *buf = (*buf & 0xf0) | (val & 0xf); | |
1934 | break; | |
1935 | ||
1936 | case BFD_RELOC_SH_IMM4BY2: | |
1937 | max = 0xf; | |
1938 | shift = 1; | |
1939 | *buf = (*buf & 0xf0) | ((val >> 1) & 0xf); | |
1940 | break; | |
1941 | ||
1942 | case BFD_RELOC_SH_IMM4BY4: | |
1943 | max = 0xf; | |
1944 | shift = 2; | |
1945 | *buf = (*buf & 0xf0) | ((val >> 2) & 0xf); | |
1946 | break; | |
1947 | ||
1948 | case BFD_RELOC_SH_IMM8BY2: | |
1949 | max = 0xff; | |
1950 | shift = 1; | |
1951 | *buf = val >> 1; | |
1952 | break; | |
1953 | ||
1954 | case BFD_RELOC_SH_IMM8BY4: | |
1955 | max = 0xff; | |
1956 | shift = 2; | |
1957 | *buf = val >> 2; | |
1958 | break; | |
1959 | ||
1960 | case BFD_RELOC_8: | |
1961 | case BFD_RELOC_SH_IMM8: | |
1962 | /* Sometimes the 8 bit value is sign extended (e.g., add) and | |
1963 | sometimes it is not (e.g., and). We permit any 8 bit value. | |
1964 | Note that adding further restrictions may invalidate | |
1965 | reasonable looking assembly code, such as ``and -0x1,r0''. */ | |
1966 | max = 0xff; | |
1967 | min = - 0xff; | |
1968 | *buf++ = val; | |
1969 | break; | |
1970 | ||
1971 | case BFD_RELOC_SH_PCRELIMM8BY4: | |
1972 | /* The lower two bits of the PC are cleared before the | |
1973 | displacement is added in. We can assume that the destination | |
1974 | is on a 4 byte bounday. If this instruction is also on a 4 | |
1975 | byte boundary, then we want | |
1976 | (target - here) / 4 | |
1977 | and target - here is a multiple of 4. | |
1978 | Otherwise, we are on a 2 byte boundary, and we want | |
1979 | (target - (here - 2)) / 4 | |
1980 | and target - here is not a multiple of 4. Computing | |
1981 | (target - (here - 2)) / 4 == (target - here + 2) / 4 | |
1982 | works for both cases, since in the first case the addition of | |
1983 | 2 will be removed by the division. target - here is in the | |
1984 | variable val. */ | |
1985 | val = (val + 2) / 4; | |
1986 | if (val & ~0xff) | |
1987 | as_bad_where (fixP->fx_file, fixP->fx_line, _("pcrel too far")); | |
1988 | buf[lowbyte] = val; | |
1989 | break; | |
1990 | ||
1991 | case BFD_RELOC_SH_PCRELIMM8BY2: | |
1992 | val /= 2; | |
1993 | if (val & ~0xff) | |
1994 | as_bad_where (fixP->fx_file, fixP->fx_line, _("pcrel too far")); | |
1995 | buf[lowbyte] = val; | |
1996 | break; | |
1997 | ||
1998 | case BFD_RELOC_SH_PCDISP8BY2: | |
1999 | val /= 2; | |
2000 | if (val < -0x80 || val > 0x7f) | |
2001 | as_bad_where (fixP->fx_file, fixP->fx_line, _("pcrel too far")); | |
2002 | buf[lowbyte] = val; | |
2003 | break; | |
2004 | ||
2005 | case BFD_RELOC_SH_PCDISP12BY2: | |
2006 | val /= 2; | |
2007 | if (val < -0x800 || val >= 0x7ff) | |
2008 | as_bad_where (fixP->fx_file, fixP->fx_line, _("pcrel too far")); | |
2009 | buf[lowbyte] = val & 0xff; | |
2010 | buf[highbyte] |= (val >> 8) & 0xf; | |
2011 | break; | |
2012 | ||
2013 | case BFD_RELOC_32: | |
2014 | if (! target_big_endian) | |
2015 | { | |
2016 | *buf++ = val >> 0; | |
2017 | *buf++ = val >> 8; | |
2018 | *buf++ = val >> 16; | |
2019 | *buf++ = val >> 24; | |
2020 | } | |
2021 | else | |
2022 | { | |
2023 | *buf++ = val >> 24; | |
2024 | *buf++ = val >> 16; | |
2025 | *buf++ = val >> 8; | |
2026 | *buf++ = val >> 0; | |
2027 | } | |
2028 | break; | |
2029 | ||
2030 | case BFD_RELOC_16: | |
2031 | if (! target_big_endian) | |
2032 | { | |
2033 | *buf++ = val >> 0; | |
2034 | *buf++ = val >> 8; | |
2035 | } | |
2036 | else | |
2037 | { | |
2038 | *buf++ = val >> 8; | |
2039 | *buf++ = val >> 0; | |
2040 | } | |
2041 | break; | |
2042 | ||
2043 | case BFD_RELOC_SH_USES: | |
2044 | /* Pass the value into sh_coff_reloc_mangle. */ | |
2045 | fixP->fx_addnumber = val; | |
2046 | break; | |
2047 | ||
2048 | case BFD_RELOC_SH_COUNT: | |
2049 | case BFD_RELOC_SH_ALIGN: | |
2050 | case BFD_RELOC_SH_CODE: | |
2051 | case BFD_RELOC_SH_DATA: | |
2052 | case BFD_RELOC_SH_LABEL: | |
2053 | /* Nothing to do here. */ | |
2054 | break; | |
2055 | ||
2056 | case BFD_RELOC_VTABLE_INHERIT: | |
2057 | case BFD_RELOC_VTABLE_ENTRY: | |
2058 | fixP->fx_done = 0; | |
2059 | return; | |
2060 | ||
2061 | default: | |
2062 | abort (); | |
2063 | } | |
2064 | ||
2065 | if (shift != 0) | |
2066 | { | |
2067 | if ((val & ((1 << shift) - 1)) != 0) | |
2068 | as_bad_where (fixP->fx_file, fixP->fx_line, _("misaligned offset")); | |
2069 | if (val >= 0) | |
2070 | val >>= shift; | |
2071 | else | |
2072 | val = ((val >> shift) | |
2073 | | ((long) -1 & ~ ((long) -1 >> shift))); | |
2074 | } | |
2075 | if (max != 0 && (val < min || val > max)) | |
2076 | as_bad_where (fixP->fx_file, fixP->fx_line, _("offset out of range")); | |
2077 | ||
2078 | #ifdef BFD_ASSEMBLER | |
2079 | return 0; | |
2080 | #endif | |
2081 | } | |
2082 | ||
2083 | /* Called just before address relaxation. Return the length | |
2084 | by which a fragment must grow to reach it's destination. */ | |
2085 | ||
2086 | int | |
2087 | md_estimate_size_before_relax (fragP, segment_type) | |
2088 | register fragS *fragP; | |
2089 | register segT segment_type; | |
2090 | { | |
2091 | switch (fragP->fr_subtype) | |
2092 | { | |
2093 | case C (UNCOND_JUMP, UNDEF_DISP): | |
2094 | /* used to be a branch to somewhere which was unknown */ | |
2095 | if (!fragP->fr_symbol) | |
2096 | { | |
2097 | fragP->fr_subtype = C (UNCOND_JUMP, UNCOND12); | |
2098 | fragP->fr_var = md_relax_table[C (UNCOND_JUMP, UNCOND12)].rlx_length; | |
2099 | } | |
2100 | else if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type) | |
2101 | { | |
2102 | fragP->fr_subtype = C (UNCOND_JUMP, UNCOND12); | |
2103 | fragP->fr_var = md_relax_table[C (UNCOND_JUMP, UNCOND12)].rlx_length; | |
2104 | } | |
2105 | else | |
2106 | { | |
2107 | fragP->fr_subtype = C (UNCOND_JUMP, UNDEF_WORD_DISP); | |
2108 | fragP->fr_var = md_relax_table[C (UNCOND_JUMP, UNCOND32)].rlx_length; | |
2109 | return md_relax_table[C (UNCOND_JUMP, UNCOND32)].rlx_length; | |
2110 | } | |
2111 | break; | |
2112 | ||
2113 | default: | |
2114 | abort (); | |
2115 | case C (COND_JUMP, UNDEF_DISP): | |
2116 | case C (COND_JUMP_DELAY, UNDEF_DISP): | |
2117 | /* used to be a branch to somewhere which was unknown */ | |
2118 | if (fragP->fr_symbol | |
2119 | && S_GET_SEGMENT (fragP->fr_symbol) == segment_type) | |
2120 | { | |
2121 | int what = GET_WHAT (fragP->fr_subtype); | |
2122 | /* Got a symbol and it's defined in this segment, become byte | |
2123 | sized - maybe it will fix up */ | |
2124 | fragP->fr_subtype = C (what, COND8); | |
2125 | fragP->fr_var = md_relax_table[C (what, COND8)].rlx_length; | |
2126 | } | |
2127 | else if (fragP->fr_symbol) | |
2128 | { | |
2129 | int what = GET_WHAT (fragP->fr_subtype); | |
2130 | /* Its got a segment, but its not ours, so it will always be long */ | |
2131 | fragP->fr_subtype = C (what, UNDEF_WORD_DISP); | |
2132 | fragP->fr_var = md_relax_table[C (what, COND32)].rlx_length; | |
2133 | return md_relax_table[C (what, COND32)].rlx_length; | |
2134 | } | |
2135 | else | |
2136 | { | |
2137 | int what = GET_WHAT (fragP->fr_subtype); | |
2138 | /* We know the abs value */ | |
2139 | fragP->fr_subtype = C (what, COND8); | |
2140 | fragP->fr_var = md_relax_table[C (what, COND8)].rlx_length; | |
2141 | } | |
2142 | ||
2143 | break; | |
2144 | } | |
2145 | return fragP->fr_var; | |
2146 | } | |
2147 | ||
2148 | /* Put number into target byte order */ | |
2149 | ||
2150 | void | |
2151 | md_number_to_chars (ptr, use, nbytes) | |
2152 | char *ptr; | |
2153 | valueT use; | |
2154 | int nbytes; | |
2155 | { | |
2156 | if (! target_big_endian) | |
2157 | number_to_chars_littleendian (ptr, use, nbytes); | |
2158 | else | |
2159 | number_to_chars_bigendian (ptr, use, nbytes); | |
2160 | } | |
2161 | ||
2162 | long | |
2163 | md_pcrel_from (fixP) | |
2164 | fixS *fixP; | |
2165 | { | |
2166 | return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address + 2; | |
2167 | } | |
2168 | ||
2169 | #ifdef OBJ_COFF | |
2170 | ||
2171 | int | |
2172 | tc_coff_sizemachdep (frag) | |
2173 | fragS *frag; | |
2174 | { | |
2175 | return md_relax_table[frag->fr_subtype].rlx_length; | |
2176 | } | |
2177 | ||
2178 | #endif /* OBJ_COFF */ | |
2179 | ||
2180 | /* When we align the .text section, insert the correct NOP pattern. */ | |
2181 | ||
2182 | int | |
2183 | sh_do_align (n, fill, len, max) | |
2184 | int n; | |
2185 | const char *fill; | |
2186 | int len; | |
2187 | int max; | |
2188 | { | |
2189 | if (fill == NULL | |
2190 | #ifdef BFD_ASSEMBLER | |
2191 | && (now_seg->flags & SEC_CODE) != 0 | |
2192 | #else | |
2193 | && now_seg != data_section | |
2194 | && now_seg != bss_section | |
2195 | #endif | |
2196 | && n > 1) | |
2197 | { | |
2198 | static const unsigned char big_nop_pattern[] = { 0x00, 0x09 }; | |
2199 | static const unsigned char little_nop_pattern[] = { 0x09, 0x00 }; | |
2200 | ||
2201 | /* First align to a 2 byte boundary, in case there is an odd | |
2202 | .byte. */ | |
2203 | frag_align (1, 0, 0); | |
2204 | if (target_big_endian) | |
2205 | frag_align_pattern (n, big_nop_pattern, sizeof big_nop_pattern, max); | |
2206 | else | |
2207 | frag_align_pattern (n, little_nop_pattern, sizeof little_nop_pattern, | |
2208 | max); | |
2209 | return 1; | |
2210 | } | |
2211 | ||
2212 | return 0; | |
2213 | } | |
2214 | ||
2215 | #ifndef BFD_ASSEMBLER | |
2216 | #ifdef OBJ_COFF | |
2217 | ||
2218 | /* Map BFD relocs to SH COFF relocs. */ | |
2219 | ||
2220 | struct reloc_map | |
2221 | { | |
2222 | bfd_reloc_code_real_type bfd_reloc; | |
2223 | int sh_reloc; | |
2224 | }; | |
2225 | ||
2226 | static const struct reloc_map coff_reloc_map[] = | |
2227 | { | |
2228 | { BFD_RELOC_32, R_SH_IMM32 }, | |
2229 | { BFD_RELOC_16, R_SH_IMM16 }, | |
2230 | { BFD_RELOC_8, R_SH_IMM8 }, | |
2231 | { BFD_RELOC_SH_PCDISP8BY2, R_SH_PCDISP8BY2 }, | |
2232 | { BFD_RELOC_SH_PCDISP12BY2, R_SH_PCDISP }, | |
2233 | { BFD_RELOC_SH_IMM4, R_SH_IMM4 }, | |
2234 | { BFD_RELOC_SH_IMM4BY2, R_SH_IMM4BY2 }, | |
2235 | { BFD_RELOC_SH_IMM4BY4, R_SH_IMM4BY4 }, | |
2236 | { BFD_RELOC_SH_IMM8, R_SH_IMM8 }, | |
2237 | { BFD_RELOC_SH_IMM8BY2, R_SH_IMM8BY2 }, | |
2238 | { BFD_RELOC_SH_IMM8BY4, R_SH_IMM8BY4 }, | |
2239 | { BFD_RELOC_SH_PCRELIMM8BY2, R_SH_PCRELIMM8BY2 }, | |
2240 | { BFD_RELOC_SH_PCRELIMM8BY4, R_SH_PCRELIMM8BY4 }, | |
2241 | { BFD_RELOC_8_PCREL, R_SH_SWITCH8 }, | |
2242 | { BFD_RELOC_SH_SWITCH16, R_SH_SWITCH16 }, | |
2243 | { BFD_RELOC_SH_SWITCH32, R_SH_SWITCH32 }, | |
2244 | { BFD_RELOC_SH_USES, R_SH_USES }, | |
2245 | { BFD_RELOC_SH_COUNT, R_SH_COUNT }, | |
2246 | { BFD_RELOC_SH_ALIGN, R_SH_ALIGN }, | |
2247 | { BFD_RELOC_SH_CODE, R_SH_CODE }, | |
2248 | { BFD_RELOC_SH_DATA, R_SH_DATA }, | |
2249 | { BFD_RELOC_SH_LABEL, R_SH_LABEL }, | |
2250 | { BFD_RELOC_UNUSED, 0 } | |
2251 | }; | |
2252 | ||
2253 | /* Adjust a reloc for the SH. This is similar to the generic code, | |
2254 | but does some minor tweaking. */ | |
2255 | ||
2256 | void | |
2257 | sh_coff_reloc_mangle (seg, fix, intr, paddr) | |
2258 | segment_info_type *seg; | |
2259 | fixS *fix; | |
2260 | struct internal_reloc *intr; | |
2261 | unsigned int paddr; | |
2262 | { | |
2263 | symbolS *symbol_ptr = fix->fx_addsy; | |
2264 | symbolS *dot; | |
2265 | ||
2266 | intr->r_vaddr = paddr + fix->fx_frag->fr_address + fix->fx_where; | |
2267 | ||
2268 | if (! SWITCH_TABLE (fix)) | |
2269 | { | |
2270 | const struct reloc_map *rm; | |
2271 | ||
2272 | for (rm = coff_reloc_map; rm->bfd_reloc != BFD_RELOC_UNUSED; rm++) | |
2273 | if (rm->bfd_reloc == (bfd_reloc_code_real_type) fix->fx_r_type) | |
2274 | break; | |
2275 | if (rm->bfd_reloc == BFD_RELOC_UNUSED) | |
2276 | as_bad_where (fix->fx_file, fix->fx_line, | |
2277 | _("Can not represent %s relocation in this object file format"), | |
2278 | bfd_get_reloc_code_name (fix->fx_r_type)); | |
2279 | intr->r_type = rm->sh_reloc; | |
2280 | intr->r_offset = 0; | |
2281 | } | |
2282 | else | |
2283 | { | |
2284 | know (sh_relax); | |
2285 | ||
2286 | if (fix->fx_r_type == BFD_RELOC_16) | |
2287 | intr->r_type = R_SH_SWITCH16; | |
2288 | else if (fix->fx_r_type == BFD_RELOC_8) | |
2289 | intr->r_type = R_SH_SWITCH8; | |
2290 | else if (fix->fx_r_type == BFD_RELOC_32) | |
2291 | intr->r_type = R_SH_SWITCH32; | |
2292 | else | |
2293 | abort (); | |
2294 | ||
2295 | /* For a switch reloc, we set r_offset to the difference between | |
2296 | the reloc address and the subtrahend. When the linker is | |
2297 | doing relaxing, it can use the determine the starting and | |
2298 | ending points of the switch difference expression. */ | |
2299 | intr->r_offset = intr->r_vaddr - S_GET_VALUE (fix->fx_subsy); | |
2300 | } | |
2301 | ||
2302 | /* PC relative relocs are always against the current section. */ | |
2303 | if (symbol_ptr == NULL) | |
2304 | { | |
2305 | switch (fix->fx_r_type) | |
2306 | { | |
2307 | case BFD_RELOC_SH_PCRELIMM8BY2: | |
2308 | case BFD_RELOC_SH_PCRELIMM8BY4: | |
2309 | case BFD_RELOC_SH_PCDISP8BY2: | |
2310 | case BFD_RELOC_SH_PCDISP12BY2: | |
2311 | case BFD_RELOC_SH_USES: | |
2312 | symbol_ptr = seg->dot; | |
2313 | break; | |
2314 | default: | |
2315 | break; | |
2316 | } | |
2317 | } | |
2318 | ||
2319 | if (fix->fx_r_type == BFD_RELOC_SH_USES) | |
2320 | { | |
2321 | /* We can't store the offset in the object file, since this | |
2322 | reloc does not take up any space, so we store it in r_offset. | |
2323 | The fx_addnumber field was set in md_apply_fix. */ | |
2324 | intr->r_offset = fix->fx_addnumber; | |
2325 | } | |
2326 | else if (fix->fx_r_type == BFD_RELOC_SH_COUNT) | |
2327 | { | |
2328 | /* We can't store the count in the object file, since this reloc | |
2329 | does not take up any space, so we store it in r_offset. The | |
2330 | fx_offset field was set when the fixup was created in | |
2331 | sh_coff_frob_file. */ | |
2332 | intr->r_offset = fix->fx_offset; | |
2333 | /* This reloc is always absolute. */ | |
2334 | symbol_ptr = NULL; | |
2335 | } | |
2336 | else if (fix->fx_r_type == BFD_RELOC_SH_ALIGN) | |
2337 | { | |
2338 | /* Store the alignment in the r_offset field. */ | |
2339 | intr->r_offset = fix->fx_offset; | |
2340 | /* This reloc is always absolute. */ | |
2341 | symbol_ptr = NULL; | |
2342 | } | |
2343 | else if (fix->fx_r_type == BFD_RELOC_SH_CODE | |
2344 | || fix->fx_r_type == BFD_RELOC_SH_DATA | |
2345 | || fix->fx_r_type == BFD_RELOC_SH_LABEL) | |
2346 | { | |
2347 | /* These relocs are always absolute. */ | |
2348 | symbol_ptr = NULL; | |
2349 | } | |
2350 | ||
2351 | /* Turn the segment of the symbol into an offset. */ | |
2352 | if (symbol_ptr != NULL) | |
2353 | { | |
2354 | dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot; | |
2355 | if (dot != NULL) | |
2356 | intr->r_symndx = dot->sy_number; | |
2357 | else | |
2358 | intr->r_symndx = symbol_ptr->sy_number; | |
2359 | } | |
2360 | else | |
2361 | intr->r_symndx = -1; | |
2362 | } | |
2363 | ||
2364 | #endif /* OBJ_COFF */ | |
2365 | #endif /* ! BFD_ASSEMBLER */ | |
2366 | ||
2367 | #ifdef BFD_ASSEMBLER | |
2368 | ||
2369 | /* Create a reloc. */ | |
2370 | ||
2371 | arelent * | |
2372 | tc_gen_reloc (section, fixp) | |
2373 | asection *section; | |
2374 | fixS *fixp; | |
2375 | { | |
2376 | arelent *rel; | |
2377 | bfd_reloc_code_real_type r_type; | |
2378 | ||
2379 | rel = (arelent *) xmalloc (sizeof (arelent)); | |
2380 | rel->sym_ptr_ptr = &fixp->fx_addsy->bsym; | |
2381 | rel->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
2382 | ||
2383 | r_type = fixp->fx_r_type; | |
2384 | ||
2385 | if (SWITCH_TABLE (fixp)) | |
2386 | { | |
2387 | rel->addend = rel->address - S_GET_VALUE (fixp->fx_subsy); | |
2388 | if (r_type == BFD_RELOC_16) | |
2389 | r_type = BFD_RELOC_SH_SWITCH16; | |
2390 | else if (r_type == BFD_RELOC_8) | |
2391 | r_type = BFD_RELOC_8_PCREL; | |
2392 | else if (r_type == BFD_RELOC_32) | |
2393 | r_type = BFD_RELOC_SH_SWITCH32; | |
2394 | else | |
2395 | abort (); | |
2396 | } | |
2397 | else if (r_type == BFD_RELOC_SH_USES) | |
2398 | rel->addend = fixp->fx_addnumber; | |
2399 | else if (r_type == BFD_RELOC_SH_COUNT) | |
2400 | rel->addend = fixp->fx_offset; | |
2401 | else if (r_type == BFD_RELOC_SH_ALIGN) | |
2402 | rel->addend = fixp->fx_offset; | |
2403 | else if (r_type == BFD_RELOC_VTABLE_INHERIT | |
2404 | || r_type == BFD_RELOC_VTABLE_ENTRY) | |
2405 | rel->addend = fixp->fx_offset; | |
2406 | else if (fixp->fx_pcrel) | |
2407 | rel->addend = fixp->fx_addnumber; | |
2408 | else | |
2409 | rel->addend = 0; | |
2410 | ||
2411 | rel->howto = bfd_reloc_type_lookup (stdoutput, r_type); | |
2412 | if (rel->howto == NULL) | |
2413 | { | |
2414 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2415 | _("Cannot represent relocation type %s"), | |
2416 | bfd_get_reloc_code_name (r_type)); | |
2417 | /* Set howto to a garbage value so that we can keep going. */ | |
2418 | rel->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32); | |
2419 | assert (rel->howto != NULL); | |
2420 | } | |
2421 | ||
2422 | return rel; | |
2423 | } | |
2424 | ||
2425 | #endif /* BFD_ASSEMBLER */ |