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93fbbb04 GK |
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 | ||
7 | Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. | |
8 | ||
9 | This file is part of the GNU Binutils and GDB, the GNU debugger. | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2, or (at your option) | |
14 | any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software Foundation, Inc., | |
23 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
24 | ||
25 | /* ??? Eventually more and more of this stuff can go to cpu-independent files. | |
26 | Keep that in mind. */ | |
27 | ||
28 | #include "sysdep.h" | |
29 | #include <stdio.h> | |
30 | #include "ansidecl.h" | |
31 | #include "dis-asm.h" | |
32 | #include "bfd.h" | |
33 | #include "symcat.h" | |
34 | #include "xstormy16-desc.h" | |
35 | #include "xstormy16-opc.h" | |
36 | #include "opintl.h" | |
37 | ||
38 | /* Default text to print if an instruction isn't recognized. */ | |
39 | #define UNKNOWN_INSN_MSG _("*unknown*") | |
40 | ||
41 | static void print_normal | |
42 | PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned int, bfd_vma, int)); | |
43 | static void print_address | |
44 | PARAMS ((CGEN_CPU_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int)); | |
45 | static void print_keyword | |
46 | PARAMS ((CGEN_CPU_DESC, PTR, CGEN_KEYWORD *, long, unsigned int)); | |
47 | static void print_insn_normal | |
48 | PARAMS ((CGEN_CPU_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *, | |
49 | bfd_vma, int)); | |
50 | static int print_insn | |
51 | PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *, char *, unsigned)); | |
52 | static int default_print_insn | |
53 | PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *)); | |
54 | static int read_insn | |
55 | PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *, char *, int, | |
56 | CGEN_EXTRACT_INFO *, unsigned long *)); | |
57 | \f | |
58 | /* -- disassembler routines inserted here */ | |
59 | ||
60 | ||
61 | void xstormy16_cgen_print_operand | |
62 | PARAMS ((CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, | |
63 | void const *, bfd_vma, int)); | |
64 | ||
65 | /* Main entry point for printing operands. | |
66 | XINFO is a `void *' and not a `disassemble_info *' to not put a requirement | |
67 | of dis-asm.h on cgen.h. | |
68 | ||
69 | This function is basically just a big switch statement. Earlier versions | |
70 | used tables to look up the function to use, but | |
71 | - if the table contains both assembler and disassembler functions then | |
72 | the disassembler contains much of the assembler and vice-versa, | |
73 | - there's a lot of inlining possibilities as things grow, | |
74 | - using a switch statement avoids the function call overhead. | |
75 | ||
76 | This function could be moved into `print_insn_normal', but keeping it | |
77 | separate makes clear the interface between `print_insn_normal' and each of | |
78 | the handlers. */ | |
79 | ||
80 | void | |
81 | xstormy16_cgen_print_operand (cd, opindex, xinfo, fields, attrs, pc, length) | |
82 | CGEN_CPU_DESC cd; | |
83 | int opindex; | |
84 | PTR xinfo; | |
85 | CGEN_FIELDS *fields; | |
86 | void const *attrs ATTRIBUTE_UNUSED; | |
87 | bfd_vma pc; | |
88 | int length; | |
89 | { | |
90 | disassemble_info *info = (disassemble_info *) xinfo; | |
91 | ||
92 | switch (opindex) | |
93 | { | |
94 | case XSTORMY16_OPERAND_RB : | |
1951c6f7 | 95 | print_keyword (cd, info, & xstormy16_cgen_opval_gr_Rb_names, fields->f_Rb, 0); |
93fbbb04 GK |
96 | break; |
97 | case XSTORMY16_OPERAND_RBJ : | |
1951c6f7 | 98 | print_keyword (cd, info, & xstormy16_cgen_opval_gr_Rb_names, fields->f_Rbj, 0); |
93fbbb04 GK |
99 | break; |
100 | case XSTORMY16_OPERAND_RD : | |
101 | print_keyword (cd, info, & xstormy16_cgen_opval_gr_names, fields->f_Rd, 0); | |
102 | break; | |
103 | case XSTORMY16_OPERAND_RDM : | |
104 | print_keyword (cd, info, & xstormy16_cgen_opval_gr_names, fields->f_Rdm, 0); | |
105 | break; | |
106 | case XSTORMY16_OPERAND_RM : | |
107 | print_keyword (cd, info, & xstormy16_cgen_opval_gr_names, fields->f_Rm, 0); | |
108 | break; | |
109 | case XSTORMY16_OPERAND_RS : | |
110 | print_keyword (cd, info, & xstormy16_cgen_opval_gr_names, fields->f_Rs, 0); | |
111 | break; | |
112 | case XSTORMY16_OPERAND_ABS24 : | |
113 | print_normal (cd, info, fields->f_abs24, 0|(1<<CGEN_OPERAND_ABS_ADDR)|(1<<CGEN_OPERAND_VIRTUAL), pc, length); | |
114 | break; | |
115 | case XSTORMY16_OPERAND_BCOND2 : | |
116 | print_keyword (cd, info, & xstormy16_cgen_opval_h_branchcond, fields->f_op2, 0); | |
117 | break; | |
118 | case XSTORMY16_OPERAND_BCOND5 : | |
119 | print_keyword (cd, info, & xstormy16_cgen_opval_h_branchcond, fields->f_op5, 0); | |
120 | break; | |
121 | case XSTORMY16_OPERAND_HMEM8 : | |
122 | print_normal (cd, info, fields->f_hmem8, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length); | |
123 | break; | |
124 | case XSTORMY16_OPERAND_IMM12 : | |
125 | print_normal (cd, info, fields->f_imm12, 0|(1<<CGEN_OPERAND_SIGNED), pc, length); | |
126 | break; | |
127 | case XSTORMY16_OPERAND_IMM16 : | |
128 | print_normal (cd, info, fields->f_imm16, 0|(1<<CGEN_OPERAND_SIGN_OPT), pc, length); | |
129 | break; | |
130 | case XSTORMY16_OPERAND_IMM2 : | |
131 | print_normal (cd, info, fields->f_imm2, 0, pc, length); | |
132 | break; | |
133 | case XSTORMY16_OPERAND_IMM3 : | |
134 | print_normal (cd, info, fields->f_imm3, 0, pc, length); | |
135 | break; | |
136 | case XSTORMY16_OPERAND_IMM3B : | |
137 | print_normal (cd, info, fields->f_imm3b, 0, pc, length); | |
138 | break; | |
139 | case XSTORMY16_OPERAND_IMM4 : | |
140 | print_normal (cd, info, fields->f_imm4, 0, pc, length); | |
141 | break; | |
142 | case XSTORMY16_OPERAND_IMM8 : | |
143 | print_normal (cd, info, fields->f_imm8, 0, pc, length); | |
144 | break; | |
145 | case XSTORMY16_OPERAND_IMM8SMALL : | |
146 | print_normal (cd, info, fields->f_imm8, 0, pc, length); | |
147 | break; | |
148 | case XSTORMY16_OPERAND_LMEM8 : | |
149 | print_normal (cd, info, fields->f_lmem8, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length); | |
150 | break; | |
151 | case XSTORMY16_OPERAND_REL12 : | |
152 | print_normal (cd, info, fields->f_rel12, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); | |
153 | break; | |
154 | case XSTORMY16_OPERAND_REL12A : | |
155 | print_normal (cd, info, fields->f_rel12a, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); | |
156 | break; | |
157 | case XSTORMY16_OPERAND_REL8_2 : | |
158 | print_normal (cd, info, fields->f_rel8_2, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); | |
159 | break; | |
160 | case XSTORMY16_OPERAND_REL8_4 : | |
161 | print_normal (cd, info, fields->f_rel8_4, 0|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length); | |
162 | break; | |
163 | case XSTORMY16_OPERAND_WS2 : | |
164 | print_keyword (cd, info, & xstormy16_cgen_opval_h_wordsize, fields->f_op2m, 0); | |
165 | break; | |
166 | ||
167 | default : | |
168 | /* xgettext:c-format */ | |
169 | fprintf (stderr, _("Unrecognized field %d while printing insn.\n"), | |
170 | opindex); | |
171 | abort (); | |
172 | } | |
173 | } | |
174 | ||
175 | cgen_print_fn * const xstormy16_cgen_print_handlers[] = | |
176 | { | |
177 | print_insn_normal, | |
178 | }; | |
179 | ||
180 | ||
181 | void | |
182 | xstormy16_cgen_init_dis (cd) | |
183 | CGEN_CPU_DESC cd; | |
184 | { | |
185 | xstormy16_cgen_init_opcode_table (cd); | |
186 | xstormy16_cgen_init_ibld_table (cd); | |
187 | cd->print_handlers = & xstormy16_cgen_print_handlers[0]; | |
188 | cd->print_operand = xstormy16_cgen_print_operand; | |
189 | } | |
190 | ||
191 | \f | |
192 | /* Default print handler. */ | |
193 | ||
194 | static void | |
195 | print_normal (cd, dis_info, value, attrs, pc, length) | |
196 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; | |
197 | PTR dis_info; | |
198 | long value; | |
199 | unsigned int attrs; | |
200 | bfd_vma pc ATTRIBUTE_UNUSED; | |
201 | int length ATTRIBUTE_UNUSED; | |
202 | { | |
203 | disassemble_info *info = (disassemble_info *) dis_info; | |
204 | ||
205 | #ifdef CGEN_PRINT_NORMAL | |
206 | CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length); | |
207 | #endif | |
208 | ||
209 | /* Print the operand as directed by the attributes. */ | |
210 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) | |
211 | ; /* nothing to do */ | |
212 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) | |
213 | (*info->fprintf_func) (info->stream, "%ld", value); | |
214 | else | |
215 | (*info->fprintf_func) (info->stream, "0x%lx", value); | |
216 | } | |
217 | ||
218 | /* Default address handler. */ | |
219 | ||
220 | static void | |
221 | print_address (cd, dis_info, value, attrs, pc, length) | |
222 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; | |
223 | PTR dis_info; | |
224 | bfd_vma value; | |
225 | unsigned int attrs; | |
226 | bfd_vma pc ATTRIBUTE_UNUSED; | |
227 | int length ATTRIBUTE_UNUSED; | |
228 | { | |
229 | disassemble_info *info = (disassemble_info *) dis_info; | |
230 | ||
231 | #ifdef CGEN_PRINT_ADDRESS | |
232 | CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length); | |
233 | #endif | |
234 | ||
235 | /* Print the operand as directed by the attributes. */ | |
236 | if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY)) | |
237 | ; /* nothing to do */ | |
238 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR)) | |
239 | (*info->print_address_func) (value, info); | |
240 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR)) | |
241 | (*info->print_address_func) (value, info); | |
242 | else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED)) | |
243 | (*info->fprintf_func) (info->stream, "%ld", (long) value); | |
244 | else | |
245 | (*info->fprintf_func) (info->stream, "0x%lx", (long) value); | |
246 | } | |
247 | ||
248 | /* Keyword print handler. */ | |
249 | ||
250 | static void | |
251 | print_keyword (cd, dis_info, keyword_table, value, attrs) | |
252 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; | |
253 | PTR dis_info; | |
254 | CGEN_KEYWORD *keyword_table; | |
255 | long value; | |
256 | unsigned int attrs ATTRIBUTE_UNUSED; | |
257 | { | |
258 | disassemble_info *info = (disassemble_info *) dis_info; | |
259 | const CGEN_KEYWORD_ENTRY *ke; | |
260 | ||
261 | ke = cgen_keyword_lookup_value (keyword_table, value); | |
262 | if (ke != NULL) | |
263 | (*info->fprintf_func) (info->stream, "%s", ke->name); | |
264 | else | |
265 | (*info->fprintf_func) (info->stream, "???"); | |
266 | } | |
267 | \f | |
268 | /* Default insn printer. | |
269 | ||
270 | DIS_INFO is defined as `PTR' so the disassembler needn't know anything | |
271 | about disassemble_info. */ | |
272 | ||
273 | static void | |
274 | print_insn_normal (cd, dis_info, insn, fields, pc, length) | |
275 | CGEN_CPU_DESC cd; | |
276 | PTR dis_info; | |
277 | const CGEN_INSN *insn; | |
278 | CGEN_FIELDS *fields; | |
279 | bfd_vma pc; | |
280 | int length; | |
281 | { | |
282 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
283 | disassemble_info *info = (disassemble_info *) dis_info; | |
284 | const CGEN_SYNTAX_CHAR_TYPE *syn; | |
285 | ||
286 | CGEN_INIT_PRINT (cd); | |
287 | ||
288 | for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn) | |
289 | { | |
290 | if (CGEN_SYNTAX_MNEMONIC_P (*syn)) | |
291 | { | |
292 | (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn)); | |
293 | continue; | |
294 | } | |
295 | if (CGEN_SYNTAX_CHAR_P (*syn)) | |
296 | { | |
297 | (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn)); | |
298 | continue; | |
299 | } | |
300 | ||
301 | /* We have an operand. */ | |
302 | xstormy16_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info, | |
303 | fields, CGEN_INSN_ATTRS (insn), pc, length); | |
304 | } | |
305 | } | |
306 | \f | |
307 | /* Subroutine of print_insn. Reads an insn into the given buffers and updates | |
308 | the extract info. | |
309 | Returns 0 if all is well, non-zero otherwise. */ | |
310 | ||
311 | static int | |
312 | read_insn (cd, pc, info, buf, buflen, ex_info, insn_value) | |
313 | CGEN_CPU_DESC cd ATTRIBUTE_UNUSED; | |
314 | bfd_vma pc; | |
315 | disassemble_info *info; | |
316 | char *buf; | |
317 | int buflen; | |
318 | CGEN_EXTRACT_INFO *ex_info; | |
319 | unsigned long *insn_value; | |
320 | { | |
321 | int status = (*info->read_memory_func) (pc, buf, buflen, info); | |
322 | if (status != 0) | |
323 | { | |
324 | (*info->memory_error_func) (status, pc, info); | |
325 | return -1; | |
326 | } | |
327 | ||
328 | ex_info->dis_info = info; | |
329 | ex_info->valid = (1 << buflen) - 1; | |
330 | ex_info->insn_bytes = buf; | |
331 | ||
332 | *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG); | |
333 | return 0; | |
334 | } | |
335 | ||
336 | /* Utility to print an insn. | |
337 | BUF is the base part of the insn, target byte order, BUFLEN bytes long. | |
338 | The result is the size of the insn in bytes or zero for an unknown insn | |
339 | or -1 if an error occurs fetching data (memory_error_func will have | |
340 | been called). */ | |
341 | ||
342 | static int | |
343 | print_insn (cd, pc, info, buf, buflen) | |
344 | CGEN_CPU_DESC cd; | |
345 | bfd_vma pc; | |
346 | disassemble_info *info; | |
347 | char *buf; | |
348 | unsigned int buflen; | |
349 | { | |
350 | CGEN_INSN_INT insn_value; | |
351 | const CGEN_INSN_LIST *insn_list; | |
352 | CGEN_EXTRACT_INFO ex_info; | |
1951c6f7 | 353 | int basesize; |
93fbbb04 GK |
354 | |
355 | /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */ | |
1951c6f7 MG |
356 | basesize = cd->base_insn_bitsize < buflen * 8 ? |
357 | cd->base_insn_bitsize : buflen * 8; | |
358 | insn_value = cgen_get_insn_value (cd, buf, basesize); | |
359 | ||
93fbbb04 GK |
360 | |
361 | /* Fill in ex_info fields like read_insn would. Don't actually call | |
362 | read_insn, since the incoming buffer is already read (and possibly | |
363 | modified a la m32r). */ | |
364 | ex_info.valid = (1 << buflen) - 1; | |
365 | ex_info.dis_info = info; | |
366 | ex_info.insn_bytes = buf; | |
367 | ||
368 | /* The instructions are stored in hash lists. | |
369 | Pick the first one and keep trying until we find the right one. */ | |
370 | ||
371 | insn_list = CGEN_DIS_LOOKUP_INSN (cd, buf, insn_value); | |
372 | while (insn_list != NULL) | |
373 | { | |
374 | const CGEN_INSN *insn = insn_list->insn; | |
375 | CGEN_FIELDS fields; | |
376 | int length; | |
377 | unsigned long insn_value_cropped; | |
378 | ||
379 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
380 | /* Not needed as insn shouldn't be in hash lists if not supported. */ | |
381 | /* Supported by this cpu? */ | |
382 | if (! xstormy16_cgen_insn_supported (cd, insn)) | |
383 | { | |
384 | insn_list = CGEN_DIS_NEXT_INSN (insn_list); | |
385 | continue; | |
386 | } | |
387 | #endif | |
388 | ||
389 | /* Basic bit mask must be correct. */ | |
390 | /* ??? May wish to allow target to defer this check until the extract | |
391 | handler. */ | |
392 | ||
393 | /* Base size may exceed this instruction's size. Extract the | |
394 | relevant part from the buffer. */ | |
395 | if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen && | |
396 | (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) | |
397 | insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn), | |
398 | info->endian == BFD_ENDIAN_BIG); | |
399 | else | |
400 | insn_value_cropped = insn_value; | |
401 | ||
402 | if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn)) | |
403 | == CGEN_INSN_BASE_VALUE (insn)) | |
404 | { | |
405 | /* Printing is handled in two passes. The first pass parses the | |
406 | machine insn and extracts the fields. The second pass prints | |
407 | them. */ | |
408 | ||
409 | /* Make sure the entire insn is loaded into insn_value, if it | |
410 | can fit. */ | |
411 | if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) && | |
412 | (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long)) | |
413 | { | |
414 | unsigned long full_insn_value; | |
415 | int rc = read_insn (cd, pc, info, buf, | |
416 | CGEN_INSN_BITSIZE (insn) / 8, | |
417 | & ex_info, & full_insn_value); | |
418 | if (rc != 0) | |
419 | return rc; | |
420 | length = CGEN_EXTRACT_FN (cd, insn) | |
421 | (cd, insn, &ex_info, full_insn_value, &fields, pc); | |
422 | } | |
423 | else | |
424 | length = CGEN_EXTRACT_FN (cd, insn) | |
425 | (cd, insn, &ex_info, insn_value_cropped, &fields, pc); | |
426 | ||
427 | /* length < 0 -> error */ | |
428 | if (length < 0) | |
429 | return length; | |
430 | if (length > 0) | |
431 | { | |
432 | CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length); | |
433 | /* length is in bits, result is in bytes */ | |
434 | return length / 8; | |
435 | } | |
436 | } | |
437 | ||
438 | insn_list = CGEN_DIS_NEXT_INSN (insn_list); | |
439 | } | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
444 | /* Default value for CGEN_PRINT_INSN. | |
445 | The result is the size of the insn in bytes or zero for an unknown insn | |
446 | or -1 if an error occured fetching bytes. */ | |
447 | ||
448 | #ifndef CGEN_PRINT_INSN | |
449 | #define CGEN_PRINT_INSN default_print_insn | |
450 | #endif | |
451 | ||
452 | static int | |
453 | default_print_insn (cd, pc, info) | |
454 | CGEN_CPU_DESC cd; | |
455 | bfd_vma pc; | |
456 | disassemble_info *info; | |
457 | { | |
458 | char buf[CGEN_MAX_INSN_SIZE]; | |
459 | int buflen; | |
460 | int status; | |
461 | ||
462 | /* Attempt to read the base part of the insn. */ | |
463 | buflen = cd->base_insn_bitsize / 8; | |
464 | status = (*info->read_memory_func) (pc, buf, buflen, info); | |
465 | ||
466 | /* Try again with the minimum part, if min < base. */ | |
467 | if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize)) | |
468 | { | |
469 | buflen = cd->min_insn_bitsize / 8; | |
470 | status = (*info->read_memory_func) (pc, buf, buflen, info); | |
471 | } | |
472 | ||
473 | if (status != 0) | |
474 | { | |
475 | (*info->memory_error_func) (status, pc, info); | |
476 | return -1; | |
477 | } | |
478 | ||
479 | return print_insn (cd, pc, info, buf, buflen); | |
480 | } | |
481 | ||
482 | /* Main entry point. | |
483 | Print one instruction from PC on INFO->STREAM. | |
484 | Return the size of the instruction (in bytes). */ | |
485 | ||
486 | int | |
487 | print_insn_xstormy16 (pc, info) | |
488 | bfd_vma pc; | |
489 | disassemble_info *info; | |
490 | { | |
491 | static CGEN_CPU_DESC cd = 0; | |
492 | static int prev_isa; | |
493 | static int prev_mach; | |
494 | static int prev_endian; | |
495 | int length; | |
496 | int isa,mach; | |
497 | int endian = (info->endian == BFD_ENDIAN_BIG | |
498 | ? CGEN_ENDIAN_BIG | |
499 | : CGEN_ENDIAN_LITTLE); | |
500 | enum bfd_architecture arch; | |
501 | ||
502 | /* ??? gdb will set mach but leave the architecture as "unknown" */ | |
503 | #ifndef CGEN_BFD_ARCH | |
504 | #define CGEN_BFD_ARCH bfd_arch_xstormy16 | |
505 | #endif | |
506 | arch = info->arch; | |
507 | if (arch == bfd_arch_unknown) | |
508 | arch = CGEN_BFD_ARCH; | |
509 | ||
510 | /* There's no standard way to compute the machine or isa number | |
511 | so we leave it to the target. */ | |
512 | #ifdef CGEN_COMPUTE_MACH | |
513 | mach = CGEN_COMPUTE_MACH (info); | |
514 | #else | |
515 | mach = info->mach; | |
516 | #endif | |
517 | ||
518 | #ifdef CGEN_COMPUTE_ISA | |
519 | isa = CGEN_COMPUTE_ISA (info); | |
520 | #else | |
521 | isa = 0; | |
522 | #endif | |
523 | ||
524 | /* If we've switched cpu's, close the current table and open a new one. */ | |
525 | if (cd | |
526 | && (isa != prev_isa | |
527 | || mach != prev_mach | |
528 | || endian != prev_endian)) | |
529 | { | |
530 | xstormy16_cgen_cpu_close (cd); | |
531 | cd = 0; | |
532 | } | |
533 | ||
534 | /* If we haven't initialized yet, initialize the opcode table. */ | |
535 | if (! cd) | |
536 | { | |
537 | const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach); | |
538 | const char *mach_name; | |
539 | ||
540 | if (!arch_type) | |
541 | abort (); | |
542 | mach_name = arch_type->printable_name; | |
543 | ||
544 | prev_isa = isa; | |
545 | prev_mach = mach; | |
546 | prev_endian = endian; | |
547 | cd = xstormy16_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa, | |
548 | CGEN_CPU_OPEN_BFDMACH, mach_name, | |
549 | CGEN_CPU_OPEN_ENDIAN, prev_endian, | |
550 | CGEN_CPU_OPEN_END); | |
551 | if (!cd) | |
552 | abort (); | |
553 | xstormy16_cgen_init_dis (cd); | |
554 | } | |
555 | ||
556 | /* We try to have as much common code as possible. | |
557 | But at this point some targets need to take over. */ | |
558 | /* ??? Some targets may need a hook elsewhere. Try to avoid this, | |
559 | but if not possible try to move this hook elsewhere rather than | |
560 | have two hooks. */ | |
561 | length = CGEN_PRINT_INSN (cd, pc, info); | |
562 | if (length > 0) | |
563 | return length; | |
564 | if (length < 0) | |
565 | return -1; | |
566 | ||
567 | (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG); | |
568 | return cd->default_insn_bitsize / 8; | |
569 | } |