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a40cbfa3 NC |
1 | /* Disassembler interface for targets using CGEN. -*- C -*- |
2 | CGEN: Cpu tools GENerator | |
3 | ||
4 | THIS FILE IS MACHINE GENERATED WITH CGEN. | |
5 | - the resultant file is machine generated, cgen-dis.in isn't | |
6 | ||
98f70fc4 AM |
7 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
8 | Free Software Foundation, Inc. | |
a40cbfa3 NC |
9 | |
10 | This file is part of the GNU Binutils and GDB, the GNU debugger. | |
11 | ||
12 | This program is free software; you can redistribute it and/or modify | |
13 | it under the terms of the GNU General Public License as published by | |
14 | the Free Software Foundation; either version 2, or (at your option) | |
15 | any later version. | |
16 | ||
17 | This program is distributed in the hope that it will be useful, | |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
23 | along with this program; if not, write to the Free Software Foundation, Inc., | |
24 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
25 | ||
26 | /* ??? Eventually more and more of this stuff can go to cpu-independent files. | |
27 | Keep that in mind. */ | |
28 | ||
29 | #include "sysdep.h" | |
30 | #include <stdio.h> | |
31 | #include "ansidecl.h" | |
32 | #include "dis-asm.h" | |
33 | #include "bfd.h" | |
34 | #include "symcat.h" | |
98f70fc4 | 35 | #include "libiberty.h" |
a40cbfa3 NC |
36 | #include "ip2k-desc.h" |
37 | #include "ip2k-opc.h" | |
38 | #include "opintl.h" | |
39 | ||
40 | /* Default text to print if an instruction isn't recognized. */ | |
41 | #define UNKNOWN_INSN_MSG _("*unknown*") | |
42 | ||
43 | static void print_normal | |
44 | PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned int, bfd_vma, int)); | |
45 | static void print_address | |
46 | PARAMS ((CGEN_CPU_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int)); | |
47 | static void print_keyword | |
48 | PARAMS ((CGEN_CPU_DESC, PTR, CGEN_KEYWORD *, long, unsigned int)); | |
49 | static void print_insn_normal | |
50 | PARAMS ((CGEN_CPU_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *, | |
51 | bfd_vma, int)); | |
52 | static int print_insn | |
53 | PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *, char *, unsigned)); | |
54 | static int default_print_insn | |
55 | PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *)); | |
56 | static int read_insn | |
57 | PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *, char *, int, | |
58 | CGEN_EXTRACT_INFO *, unsigned long *)); | |
59 | \f | |
60 | /* -- disassembler routines inserted here */ | |
61 | ||
62 | /* -- dis.c */ | |
63 | ||
98f70fc4 AM |
64 | #define PRINT_FUNC_DECL(name) \ |
65 | static void name PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned int, bfd_vma, int)) | |
66 | ||
67 | PRINT_FUNC_DECL (print_fr); | |
68 | PRINT_FUNC_DECL (print_dollarhex); | |
69 | PRINT_FUNC_DECL (print_dollarhex8); | |
70 | PRINT_FUNC_DECL (print_dollarhex16); | |
71 | PRINT_FUNC_DECL (print_dollarhex_addr16h); | |
72 | PRINT_FUNC_DECL (print_dollarhex_addr16l); | |
73 | PRINT_FUNC_DECL (print_dollarhex_p); | |
74 | PRINT_FUNC_DECL (print_dollarhex_cj); | |
75 | PRINT_FUNC_DECL (print_decimal); | |
76 | ||
a40cbfa3 NC |
77 | static void |
78 | print_fr (cd, dis_info, value, attrs, pc, length) | |
98f70fc4 | 79 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
a40cbfa3 NC |
80 | PTR dis_info; |
81 | long value; | |
98f70fc4 AM |
82 | unsigned int attrs ATTRIBUTE_UNUSED; |
83 | bfd_vma pc ATTRIBUTE_UNUSED; | |
84 | int length ATTRIBUTE_UNUSED; | |
a40cbfa3 NC |
85 | { |
86 | disassemble_info *info = (disassemble_info *) dis_info; | |
87 | const CGEN_KEYWORD_ENTRY *ke; | |
88 | extern CGEN_KEYWORD ip2k_cgen_opval_register_names; | |
89 | long offsettest; | |
90 | long offsetvalue; | |
91 | ||
92 | if ( value == 0 ) /* This is (IP) */ | |
98f70fc4 | 93 | { |
a40cbfa3 NC |
94 | (*info->fprintf_func) (info->stream, "%s", "(IP)"); |
95 | return; | |
98f70fc4 | 96 | } |
a40cbfa3 NC |
97 | |
98 | offsettest = value >> 7; | |
99 | offsetvalue = value & 0x7F; | |
100 | ||
101 | /* Check to see if first two bits are 10 -> (DP) */ | |
102 | if ( offsettest == 2 ) | |
98f70fc4 | 103 | { |
a40cbfa3 | 104 | if ( offsetvalue == 0 ) |
98f70fc4 | 105 | (*info->fprintf_func) (info->stream, "%s","(DP)"); |
a40cbfa3 | 106 | else |
98f70fc4 | 107 | (*info->fprintf_func) (info->stream, "$%x%s",offsetvalue, "(DP)"); |
a40cbfa3 | 108 | return; |
98f70fc4 | 109 | } |
a40cbfa3 NC |
110 | |
111 | /* Check to see if first two bits are 11 -> (SP) */ | |
112 | if ( offsettest == 3 ) | |
98f70fc4 | 113 | { |
a40cbfa3 | 114 | if ( offsetvalue == 0 ) |
98f70fc4 | 115 | (*info->fprintf_func) (info->stream, "%s", "(SP)"); |
a40cbfa3 | 116 | else |
98f70fc4 | 117 | (*info->fprintf_func) (info->stream, "$%x%s", offsetvalue,"(SP)"); |
a40cbfa3 | 118 | return; |
98f70fc4 | 119 | } |
a40cbfa3 NC |
120 | |
121 | /* Attempt to print as a register keyword. */ | |
122 | ke = cgen_keyword_lookup_value (& ip2k_cgen_opval_register_names, value); | |
123 | if (ke != NULL) | |
124 | { | |
125 | (*info->fprintf_func) (info->stream, "%s", ke->name); | |
126 | return; | |
127 | } | |
128 | ||
129 | /* Print as an address literal. */ | |
130 | (*info->fprintf_func) (info->stream, "$%02x", value); | |
131 | } | |
132 | ||
133 | static void | |
134 | print_dollarhex (cd, dis_info, value, attrs, pc, length) | |
98f70fc4 | 135 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
a40cbfa3 NC |
136 | PTR dis_info; |
137 | long value; | |
98f70fc4 AM |
138 | unsigned int attrs ATTRIBUTE_UNUSED; |
139 | bfd_vma pc ATTRIBUTE_UNUSED; | |
140 | int length ATTRIBUTE_UNUSED; | |
a40cbfa3 NC |
141 | { |
142 | disassemble_info *info = (disassemble_info *) dis_info; | |
143 | ||
144 | (*info->fprintf_func) (info->stream, "$%x", value); | |
145 | } | |
146 | ||
147 | static void | |
148 | print_dollarhex8 (cd, dis_info, value, attrs, pc, length) | |
98f70fc4 | 149 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
a40cbfa3 NC |
150 | PTR dis_info; |
151 | long value; | |
98f70fc4 AM |
152 | unsigned int attrs ATTRIBUTE_UNUSED; |
153 | bfd_vma pc ATTRIBUTE_UNUSED; | |
154 | int length ATTRIBUTE_UNUSED; | |
a40cbfa3 NC |
155 | { |
156 | disassemble_info *info = (disassemble_info *) dis_info; | |
157 | ||
158 | (*info->fprintf_func) (info->stream, "$%02x", value); | |
159 | } | |
160 | ||
161 | static void | |
162 | print_dollarhex16 (cd, dis_info, value, attrs, pc, length) | |
98f70fc4 | 163 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
a40cbfa3 NC |
164 | PTR dis_info; |
165 | long value; | |
98f70fc4 AM |
166 | unsigned int attrs ATTRIBUTE_UNUSED; |
167 | bfd_vma pc ATTRIBUTE_UNUSED; | |
168 | int length ATTRIBUTE_UNUSED; | |
a40cbfa3 NC |
169 | { |
170 | disassemble_info *info = (disassemble_info *) dis_info; | |
171 | ||
172 | (*info->fprintf_func) (info->stream, "$%04x", value); | |
173 | } | |
174 | ||
175 | static void | |
176 | print_dollarhex_addr16h (cd, dis_info, value, attrs, pc, length) | |
98f70fc4 | 177 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
a40cbfa3 NC |
178 | PTR dis_info; |
179 | long value; | |
98f70fc4 AM |
180 | unsigned int attrs ATTRIBUTE_UNUSED; |
181 | bfd_vma pc ATTRIBUTE_UNUSED; | |
182 | int length ATTRIBUTE_UNUSED; | |
a40cbfa3 NC |
183 | { |
184 | disassemble_info *info = (disassemble_info *) dis_info; | |
185 | ||
186 | /* This is a loadh instruction. Shift the value to the left */ | |
187 | /* by 8 bits so that disassembled code will reassemble properly. */ | |
188 | value = ((value << 8) & 0xFF00); | |
189 | ||
190 | (*info->fprintf_func) (info->stream, "$%04x", value); | |
191 | } | |
192 | ||
193 | static void | |
194 | print_dollarhex_addr16l (cd, dis_info, value, attrs, pc, length) | |
98f70fc4 | 195 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
a40cbfa3 NC |
196 | PTR dis_info; |
197 | long value; | |
98f70fc4 AM |
198 | unsigned int attrs ATTRIBUTE_UNUSED; |
199 | bfd_vma pc ATTRIBUTE_UNUSED; | |
200 | int length ATTRIBUTE_UNUSED; | |
a40cbfa3 NC |
201 | { |
202 | disassemble_info *info = (disassemble_info *) dis_info; | |
203 | ||
204 | (*info->fprintf_func) (info->stream, "$%04x", value); | |
205 | } | |
206 | ||
207 | static void | |
208 | print_dollarhex_p (cd, dis_info, value, attrs, pc, length) | |
98f70fc4 | 209 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
a40cbfa3 NC |
210 | PTR dis_info; |
211 | long value; | |
98f70fc4 AM |
212 | unsigned int attrs ATTRIBUTE_UNUSED; |
213 | bfd_vma pc ATTRIBUTE_UNUSED; | |
214 | int length ATTRIBUTE_UNUSED; | |
a40cbfa3 NC |
215 | { |
216 | disassemble_info *info = (disassemble_info *) dis_info; | |
217 | ||
218 | value = ((value << 14) & 0x1C000); | |
219 | ;value = (value & 0x1FFFF); | |
220 | (*info->fprintf_func) (info->stream, "$%05x", value); | |
221 | } | |
222 | ||
223 | static void | |
224 | print_dollarhex_cj (cd, dis_info, value, attrs, pc, length) | |
98f70fc4 | 225 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
a40cbfa3 NC |
226 | PTR dis_info; |
227 | long value; | |
98f70fc4 AM |
228 | unsigned int attrs ATTRIBUTE_UNUSED; |
229 | bfd_vma pc ATTRIBUTE_UNUSED; | |
230 | int length ATTRIBUTE_UNUSED; | |
a40cbfa3 NC |
231 | { |
232 | disassemble_info *info = (disassemble_info *) dis_info; | |
233 | ||
234 | value = ((value << 1) & 0x1FFFF); | |
235 | (*info->fprintf_func) (info->stream, "$%05x", value); | |
236 | } | |
237 | ||
238 | ||
239 | static void | |
240 | print_decimal (cd, dis_info, value, attrs, pc, length) | |
98f70fc4 | 241 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; |
a40cbfa3 NC |
242 | PTR dis_info; |
243 | long value; | |
98f70fc4 AM |
244 | unsigned int attrs ATTRIBUTE_UNUSED; |
245 | bfd_vma pc ATTRIBUTE_UNUSED; | |
246 | int length ATTRIBUTE_UNUSED; | |
a40cbfa3 NC |
247 | { |
248 | disassemble_info *info = (disassemble_info *) dis_info; | |
249 | ||
250 | (*info->fprintf_func) (info->stream, "%d", value); | |
251 | } | |
252 | ||
253 | ||
254 | ||
255 | /* -- */ | |
256 | ||
257 | void ip2k_cgen_print_operand | |
258 | PARAMS ((CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, | |
259 | void const *, bfd_vma, int)); | |
260 | ||
261 | /* Main entry point for printing operands. | |
262 | XINFO is a `void *' and not a `disassemble_info *' to not put a requirement | |
263 | of dis-asm.h on cgen.h. | |
264 | ||
265 | This function is basically just a big switch statement. Earlier versions | |
266 | used tables to look up the function to use, but | |
267 | - if the table contains both assembler and disassembler functions then | |
268 | the disassembler contains much of the assembler and vice-versa, | |
269 | - there's a lot of inlining possibilities as things grow, | |
270 | - using a switch statement avoids the function call overhead. | |
271 | ||
272 | This function could be moved into `print_insn_normal', but keeping it | |
273 | separate makes clear the interface between `print_insn_normal' and each of | |
274 | the handlers. */ | |
275 | ||
276 | void | |
277 | ip2k_cgen_print_operand (cd, opindex, xinfo, fields, attrs, pc, length) | |
278 | CGEN_CPU_DESC cd; | |
279 | int opindex; | |
280 | PTR xinfo; | |
281 | CGEN_FIELDS *fields; | |
282 | void const *attrs ATTRIBUTE_UNUSED; | |
283 | bfd_vma pc; | |
284 | int length; | |
285 | { | |
286 | disassemble_info *info = (disassemble_info *) xinfo; | |
287 | ||
288 | switch (opindex) | |
289 | { | |
290 | case IP2K_OPERAND_ADDR16CJP : | |
291 | print_dollarhex_cj (cd, info, fields->f_addr16cjp, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length); | |
292 | break; | |
293 | case IP2K_OPERAND_ADDR16H : | |
294 | print_dollarhex_addr16h (cd, info, fields->f_imm8, 0, pc, length); | |
295 | break; | |
296 | case IP2K_OPERAND_ADDR16L : | |
297 | print_dollarhex_addr16l (cd, info, fields->f_imm8, 0, pc, length); | |
298 | break; | |
299 | case IP2K_OPERAND_ADDR16P : | |
300 | print_dollarhex_p (cd, info, fields->f_page3, 0, pc, length); | |
301 | break; | |
302 | case IP2K_OPERAND_BITNO : | |
303 | print_decimal (cd, info, fields->f_bitno, 0, pc, length); | |
304 | break; | |
305 | case IP2K_OPERAND_CBIT : | |
306 | print_normal (cd, info, 0, 0, pc, length); | |
307 | break; | |
308 | case IP2K_OPERAND_DCBIT : | |
309 | print_normal (cd, info, 0, 0, pc, length); | |
310 | break; | |
311 | case IP2K_OPERAND_FR : | |
312 | print_fr (cd, info, fields->f_reg, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length); | |
313 | break; | |
314 | case IP2K_OPERAND_LIT8 : | |
315 | print_dollarhex8 (cd, info, fields->f_imm8, 0|(1<<CGEN_OPERAND_SIGNED), pc, length); | |
316 | break; | |
317 | case IP2K_OPERAND_PABITS : | |
318 | print_normal (cd, info, 0, 0, pc, length); | |
319 | break; | |
320 | case IP2K_OPERAND_RETI3 : | |
321 | print_dollarhex (cd, info, fields->f_reti3, 0, pc, length); | |
322 | break; | |
323 | case IP2K_OPERAND_ZBIT : | |
324 | print_normal (cd, info, 0, 0, pc, length); | |
325 | break; | |
326 | ||
327 | default : | |
328 | /* xgettext:c-format */ | |
329 | fprintf (stderr, _("Unrecognized field %d while printing insn.\n"), | |
330 | opindex); | |
331 | abort (); | |
332 | } | |
333 | } | |
334 | ||
335 | cgen_print_fn * const ip2k_cgen_print_handlers[] = | |
336 | { | |
337 | print_insn_normal, | |
338 | }; | |
339 | ||
340 | ||
341 | void | |
342 | ip2k_cgen_init_dis (cd) | |
343 | CGEN_CPU_DESC cd; | |
344 | { | |
345 | ip2k_cgen_init_opcode_table (cd); | |
346 | ip2k_cgen_init_ibld_table (cd); | |
347 | cd->print_handlers = & ip2k_cgen_print_handlers[0]; | |
348 | cd->print_operand = ip2k_cgen_print_operand; | |
349 | } | |
350 | ||
351 | \f | |
352 | /* Default print handler. */ | |
353 | ||
354 | static void | |
355 | print_normal (cd, dis_info, value, attrs, pc, length) | |
356 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; | |
357 | PTR dis_info; | |
358 | long value; | |
359 | unsigned int attrs; | |
360 | bfd_vma pc ATTRIBUTE_UNUSED; | |
361 | int length ATTRIBUTE_UNUSED; | |
362 | { | |
363 | disassemble_info *info = (disassemble_info *) dis_info; | |
364 | ||
365 | #ifdef CGEN_PRINT_NORMAL | |
366 | CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length); | |
367 | #endif | |
368 | ||
369 | /* Print the operand as directed by the attributes. */ | |
370 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) | |
371 | ; /* nothing to do */ | |
372 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) | |
373 | (*info->fprintf_func) (info->stream, "%ld", value); | |
374 | else | |
375 | (*info->fprintf_func) (info->stream, "0x%lx", value); | |
376 | } | |
377 | ||
378 | /* Default address handler. */ | |
379 | ||
380 | static void | |
381 | print_address (cd, dis_info, value, attrs, pc, length) | |
382 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; | |
383 | PTR dis_info; | |
384 | bfd_vma value; | |
385 | unsigned int attrs; | |
386 | bfd_vma pc ATTRIBUTE_UNUSED; | |
387 | int length ATTRIBUTE_UNUSED; | |
388 | { | |
389 | disassemble_info *info = (disassemble_info *) dis_info; | |
390 | ||
391 | #ifdef CGEN_PRINT_ADDRESS | |
392 | CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length); | |
393 | #endif | |
394 | ||
395 | /* Print the operand as directed by the attributes. */ | |
396 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) | |
397 | ; /* nothing to do */ | |
398 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR)) | |
399 | (*info->print_address_func) (value, info); | |
400 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR)) | |
401 | (*info->print_address_func) (value, info); | |
402 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) | |
403 | (*info->fprintf_func) (info->stream, "%ld", (long) value); | |
404 | else | |
405 | (*info->fprintf_func) (info->stream, "0x%lx", (long) value); | |
406 | } | |
407 | ||
408 | /* Keyword print handler. */ | |
409 | ||
410 | static void | |
411 | print_keyword (cd, dis_info, keyword_table, value, attrs) | |
412 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; | |
413 | PTR dis_info; | |
414 | CGEN_KEYWORD *keyword_table; | |
415 | long value; | |
416 | unsigned int attrs ATTRIBUTE_UNUSED; | |
417 | { | |
418 | disassemble_info *info = (disassemble_info *) dis_info; | |
419 | const CGEN_KEYWORD_ENTRY *ke; | |
420 | ||
421 | ke = cgen_keyword_lookup_value (keyword_table, value); | |
422 | if (ke != NULL) | |
423 | (*info->fprintf_func) (info->stream, "%s", ke->name); | |
424 | else | |
425 | (*info->fprintf_func) (info->stream, "???"); | |
426 | } | |
427 | \f | |
428 | /* Default insn printer. | |
429 | ||
430 | DIS_INFO is defined as `PTR' so the disassembler needn't know anything | |
431 | about disassemble_info. */ | |
432 | ||
433 | static void | |
434 | print_insn_normal (cd, dis_info, insn, fields, pc, length) | |
435 | CGEN_CPU_DESC cd; | |
436 | PTR dis_info; | |
437 | const CGEN_INSN *insn; | |
438 | CGEN_FIELDS *fields; | |
439 | bfd_vma pc; | |
440 | int length; | |
441 | { | |
442 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
443 | disassemble_info *info = (disassemble_info *) dis_info; | |
444 | const CGEN_SYNTAX_CHAR_TYPE *syn; | |
445 | ||
446 | CGEN_INIT_PRINT (cd); | |
447 | ||
448 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) | |
449 | { | |
450 | if (CGEN_SYNTAX_MNEMONIC_P (*syn)) | |
451 | { | |
452 | (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); | |
453 | continue; | |
454 | } | |
455 | if (CGEN_SYNTAX_CHAR_P (*syn)) | |
456 | { | |
457 | (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); | |
458 | continue; | |
459 | } | |
460 | ||
461 | /* We have an operand. */ | |
462 | ip2k_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info, | |
463 | fields, CGEN_INSN_ATTRS (insn), pc, length); | |
464 | } | |
465 | } | |
466 | \f | |
467 | /* Subroutine of print_insn. Reads an insn into the given buffers and updates | |
468 | the extract info. | |
469 | Returns 0 if all is well, non-zero otherwise. */ | |
470 | ||
471 | static int | |
472 | read_insn (cd, pc, info, buf, buflen, ex_info, insn_value) | |
473 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; | |
474 | bfd_vma pc; | |
475 | disassemble_info *info; | |
476 | char *buf; | |
477 | int buflen; | |
478 | CGEN_EXTRACT_INFO *ex_info; | |
479 | unsigned long *insn_value; | |
480 | { | |
481 | int status = (*info->read_memory_func) (pc, buf, buflen, info); | |
482 | if (status != 0) | |
483 | { | |
484 | (*info->memory_error_func) (status, pc, info); | |
485 | return -1; | |
486 | } | |
487 | ||
488 | ex_info->dis_info = info; | |
489 | ex_info->valid = (1 << buflen) - 1; | |
490 | ex_info->insn_bytes = buf; | |
491 | ||
492 | *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); | |
493 | return 0; | |
494 | } | |
495 | ||
496 | /* Utility to print an insn. | |
497 | BUF is the base part of the insn, target byte order, BUFLEN bytes long. | |
498 | The result is the size of the insn in bytes or zero for an unknown insn | |
499 | or -1 if an error occurs fetching data (memory_error_func will have | |
500 | been called). */ | |
501 | ||
502 | static int | |
503 | print_insn (cd, pc, info, buf, buflen) | |
504 | CGEN_CPU_DESC cd; | |
505 | bfd_vma pc; | |
506 | disassemble_info *info; | |
507 | char *buf; | |
508 | unsigned int buflen; | |
509 | { | |
510 | CGEN_INSN_INT insn_value; | |
511 | const CGEN_INSN_LIST *insn_list; | |
512 | CGEN_EXTRACT_INFO ex_info; | |
513 | int basesize; | |
514 | ||
515 | /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */ | |
516 | basesize = cd->base_insn_bitsize < buflen * 8 ? | |
517 | cd->base_insn_bitsize : buflen * 8; | |
518 | insn_value = cgen_get_insn_value (cd, buf, basesize); | |
519 | ||
520 | ||
521 | /* Fill in ex_info fields like read_insn would. Don't actually call | |
522 | read_insn, since the incoming buffer is already read (and possibly | |
523 | modified a la m32r). */ | |
524 | ex_info.valid = (1 << buflen) - 1; | |
525 | ex_info.dis_info = info; | |
526 | ex_info.insn_bytes = buf; | |
527 | ||
528 | /* The instructions are stored in hash lists. | |
529 | Pick the first one and keep trying until we find the right one. */ | |
530 | ||
531 | insn_list = CGEN_DIS_LOOKUP_INSN (cd, buf, insn_value); | |
532 | while (insn_list != NULL) | |
533 | { | |
534 | const CGEN_INSN *insn = insn_list->insn; | |
535 | CGEN_FIELDS fields; | |
536 | int length; | |
537 | unsigned long insn_value_cropped; | |
538 | ||
539 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
540 | /* Not needed as insn shouldn't be in hash lists if not supported. */ | |
541 | /* Supported by this cpu? */ | |
542 | if (! ip2k_cgen_insn_supported (cd, insn)) | |
543 | { | |
544 | insn_list = CGEN_DIS_NEXT_INSN (insn_list); | |
545 | continue; | |
546 | } | |
547 | #endif | |
548 | ||
549 | /* Basic bit mask must be correct. */ | |
550 | /* ??? May wish to allow target to defer this check until the extract | |
551 | handler. */ | |
552 | ||
553 | /* Base size may exceed this instruction's size. Extract the | |
554 | relevant part from the buffer. */ | |
555 | if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen && | |
556 | (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) | |
557 | insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn), | |
558 | info->endian == BFD_ENDIAN_BIG); | |
559 | else | |
560 | insn_value_cropped = insn_value; | |
561 | ||
562 | if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn)) | |
563 | == CGEN_INSN_BASE_VALUE (insn)) | |
564 | { | |
565 | /* Printing is handled in two passes. The first pass parses the | |
566 | machine insn and extracts the fields. The second pass prints | |
567 | them. */ | |
568 | ||
569 | /* Make sure the entire insn is loaded into insn_value, if it | |
570 | can fit. */ | |
571 | if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) && | |
572 | (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) | |
573 | { | |
574 | unsigned long full_insn_value; | |
575 | int rc = read_insn (cd, pc, info, buf, | |
576 | CGEN_INSN_BITSIZE (insn) / 8, | |
577 | & ex_info, & full_insn_value); | |
578 | if (rc != 0) | |
579 | return rc; | |
580 | length = CGEN_EXTRACT_FN (cd, insn) | |
581 | (cd, insn, &ex_info, full_insn_value, &fields, pc); | |
582 | } | |
583 | else | |
584 | length = CGEN_EXTRACT_FN (cd, insn) | |
585 | (cd, insn, &ex_info, insn_value_cropped, &fields, pc); | |
586 | ||
587 | /* length < 0 -> error */ | |
588 | if (length < 0) | |
589 | return length; | |
590 | if (length > 0) | |
591 | { | |
592 | CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length); | |
593 | /* length is in bits, result is in bytes */ | |
594 | return length / 8; | |
595 | } | |
596 | } | |
597 | ||
598 | insn_list = CGEN_DIS_NEXT_INSN (insn_list); | |
599 | } | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
604 | /* Default value for CGEN_PRINT_INSN. | |
605 | The result is the size of the insn in bytes or zero for an unknown insn | |
606 | or -1 if an error occured fetching bytes. */ | |
607 | ||
608 | #ifndef CGEN_PRINT_INSN | |
609 | #define CGEN_PRINT_INSN default_print_insn | |
610 | #endif | |
611 | ||
612 | static int | |
613 | default_print_insn (cd, pc, info) | |
614 | CGEN_CPU_DESC cd; | |
615 | bfd_vma pc; | |
616 | disassemble_info *info; | |
617 | { | |
618 | char buf[CGEN_MAX_INSN_SIZE]; | |
619 | int buflen; | |
620 | int status; | |
621 | ||
622 | /* Attempt to read the base part of the insn. */ | |
623 | buflen = cd->base_insn_bitsize / 8; | |
624 | status = (*info->read_memory_func) (pc, buf, buflen, info); | |
625 | ||
626 | /* Try again with the minimum part, if min < base. */ | |
627 | if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize)) | |
628 | { | |
629 | buflen = cd->min_insn_bitsize / 8; | |
630 | status = (*info->read_memory_func) (pc, buf, buflen, info); | |
631 | } | |
632 | ||
633 | if (status != 0) | |
634 | { | |
635 | (*info->memory_error_func) (status, pc, info); | |
636 | return -1; | |
637 | } | |
638 | ||
639 | return print_insn (cd, pc, info, buf, buflen); | |
640 | } | |
641 | ||
642 | /* Main entry point. | |
643 | Print one instruction from PC on INFO->STREAM. | |
644 | Return the size of the instruction (in bytes). */ | |
645 | ||
646 | typedef struct cpu_desc_list { | |
647 | struct cpu_desc_list *next; | |
648 | int isa; | |
649 | int mach; | |
650 | int endian; | |
651 | CGEN_CPU_DESC cd; | |
652 | } cpu_desc_list; | |
653 | ||
654 | int | |
655 | print_insn_ip2k (pc, info) | |
656 | bfd_vma pc; | |
657 | disassemble_info *info; | |
658 | { | |
659 | static cpu_desc_list *cd_list = 0; | |
660 | cpu_desc_list *cl = 0; | |
661 | static CGEN_CPU_DESC cd = 0; | |
662 | static int prev_isa; | |
663 | static int prev_mach; | |
664 | static int prev_endian; | |
665 | int length; | |
666 | int isa,mach; | |
667 | int endian = (info->endian == BFD_ENDIAN_BIG | |
668 | ? CGEN_ENDIAN_BIG | |
669 | : CGEN_ENDIAN_LITTLE); | |
670 | enum bfd_architecture arch; | |
671 | ||
672 | /* ??? gdb will set mach but leave the architecture as "unknown" */ | |
673 | #ifndef CGEN_BFD_ARCH | |
674 | #define CGEN_BFD_ARCH bfd_arch_ip2k | |
675 | #endif | |
676 | arch = info->arch; | |
677 | if (arch == bfd_arch_unknown) | |
678 | arch = CGEN_BFD_ARCH; | |
679 | ||
680 | /* There's no standard way to compute the machine or isa number | |
681 | so we leave it to the target. */ | |
682 | #ifdef CGEN_COMPUTE_MACH | |
683 | mach = CGEN_COMPUTE_MACH (info); | |
684 | #else | |
685 | mach = info->mach; | |
686 | #endif | |
687 | ||
688 | #ifdef CGEN_COMPUTE_ISA | |
689 | isa = CGEN_COMPUTE_ISA (info); | |
690 | #else | |
691 | isa = info->insn_sets; | |
692 | #endif | |
693 | ||
694 | /* If we've switched cpu's, try to find a handle we've used before */ | |
695 | if (cd | |
696 | && (isa != prev_isa | |
697 | || mach != prev_mach | |
698 | || endian != prev_endian)) | |
699 | { | |
700 | cd = 0; | |
701 | for (cl = cd_list; cl; cl = cl->next) | |
702 | { | |
703 | if (cl->isa == isa && | |
704 | cl->mach == mach && | |
705 | cl->endian == endian) | |
706 | { | |
707 | cd = cl->cd; | |
708 | break; | |
709 | } | |
710 | } | |
711 | } | |
712 | ||
713 | /* If we haven't initialized yet, initialize the opcode table. */ | |
714 | if (! cd) | |
715 | { | |
716 | const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach); | |
717 | const char *mach_name; | |
718 | ||
719 | if (!arch_type) | |
720 | abort (); | |
721 | mach_name = arch_type->printable_name; | |
722 | ||
723 | prev_isa = isa; | |
724 | prev_mach = mach; | |
725 | prev_endian = endian; | |
726 | cd = ip2k_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa, | |
727 | CGEN_CPU_OPEN_BFDMACH, mach_name, | |
728 | CGEN_CPU_OPEN_ENDIAN, prev_endian, | |
729 | CGEN_CPU_OPEN_END); | |
730 | if (!cd) | |
731 | abort (); | |
732 | ||
733 | /* save this away for future reference */ | |
734 | cl = xmalloc (sizeof (struct cpu_desc_list)); | |
735 | cl->cd = cd; | |
736 | cl->isa = isa; | |
737 | cl->mach = mach; | |
738 | cl->endian = endian; | |
739 | cl->next = cd_list; | |
740 | cd_list = cl; | |
741 | ||
742 | ip2k_cgen_init_dis (cd); | |
743 | } | |
744 | ||
745 | /* We try to have as much common code as possible. | |
746 | But at this point some targets need to take over. */ | |
747 | /* ??? Some targets may need a hook elsewhere. Try to avoid this, | |
748 | but if not possible try to move this hook elsewhere rather than | |
749 | have two hooks. */ | |
750 | length = CGEN_PRINT_INSN (cd, pc, info); | |
751 | if (length > 0) | |
752 | return length; | |
753 | if (length < 0) | |
754 | return -1; | |
755 | ||
756 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); | |
757 | return cd->default_insn_bitsize / 8; | |
758 | } |