1 /* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */
2 /* Disassembler interface for targets using CGEN. -*- C -*-
3 CGEN: Cpu tools GENerator
4
5 THIS FILE IS MACHINE GENERATED WITH CGEN.
6 - the resultant file is machine generated, cgen-dis.in isn't
7
8 Copyright (C) 1996-2023 Free Software Foundation, Inc.
9
10 This file is part of libopcodes.
11
12 This library 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 3, or (at your option)
15 any later version.
16
17 It is distributed in the hope that it will be useful, but WITHOUT
18 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
19 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
20 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 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 "disassemble.h"
33 #include "bfd.h"
34 #include "symcat.h"
35 #include "libiberty.h"
36 #include "epiphany-desc.h"
37 #include "epiphany-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 (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int);
45 static void print_address
46 (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED;
47 static void print_keyword
48 (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED;
49 static void print_insn_normal
50 (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int);
51 static int print_insn
52 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, unsigned);
53 static int default_print_insn
54 (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED;
55 static int read_insn
56 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *,
57 unsigned long *);
58
59 /* -- disassembler routines inserted here. */
60
61 /* -- dis.c */
62
63 #define CGEN_PRINT_INSN epiphany_print_insn
64
65 static int
66 epiphany_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
67 {
68 bfd_byte buf[CGEN_MAX_INSN_SIZE];
69 int buflen;
70 int status;
71
72 info->bytes_per_chunk = 2;
73 info->bytes_per_line = 4;
74
75 /* Attempt to read the base part of the insn. */
76 buflen = cd->base_insn_bitsize / 8;
77 status = (*info->read_memory_func) (pc, buf, buflen, info);
78
79 /* Try again with the minimum part, if min < base. */
80 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
81 {
82 buflen = cd->min_insn_bitsize / 8;
83 status = (*info->read_memory_func) (pc, buf, buflen, info);
84 }
85
86 if (status != 0)
87 {
88 (*info->memory_error_func) (status, pc, info);
89 return -1;
90 }
91
92 return print_insn (cd, pc, info, buf, buflen);
93 }
94
95
96 static void
97 print_postindex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
98 void * dis_info,
99 long value,
100 unsigned int attrs ATTRIBUTE_UNUSED,
101 bfd_vma pc ATTRIBUTE_UNUSED,
102 int length ATTRIBUTE_UNUSED)
103 {
104 disassemble_info *info = (disassemble_info *) dis_info;
105 (*info->fprintf_func) (info->stream, value ? "-" : "+");
106 }
107
108 static void
109 print_simm_not_reg (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
110 void * dis_info,
111 long value,
112 unsigned int attrs ATTRIBUTE_UNUSED,
113 bfd_vma pc ATTRIBUTE_UNUSED,
114 int length ATTRIBUTE_UNUSED)
115 {
116 print_address (cd, dis_info, value, attrs, pc, length);
117 }
118
119 static void
120 print_uimm_not_reg (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
121 void * dis_info,
122 unsigned long value,
123 unsigned int attrs ATTRIBUTE_UNUSED,
124 bfd_vma pc ATTRIBUTE_UNUSED,
125 int length ATTRIBUTE_UNUSED)
126 {
127 disassemble_info *info = (disassemble_info *)dis_info;
128
129 if (value & 0x800)
130 (*info->fprintf_func) (info->stream, "-");
131
132 value &= 0x7ff;
133 print_address (cd, dis_info, value, attrs, pc, length);
134 }
135
136
137 /* -- */
138
139 void epiphany_cgen_print_operand
140 (CGEN_CPU_DESC, int, void *, CGEN_FIELDS *, void const *, bfd_vma, int);
141
142 /* Main entry point for printing operands.
143 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
144 of dis-asm.h on cgen.h.
145
146 This function is basically just a big switch statement. Earlier versions
147 used tables to look up the function to use, but
148 - if the table contains both assembler and disassembler functions then
149 the disassembler contains much of the assembler and vice-versa,
150 - there's a lot of inlining possibilities as things grow,
151 - using a switch statement avoids the function call overhead.
152
153 This function could be moved into `print_insn_normal', but keeping it
154 separate makes clear the interface between `print_insn_normal' and each of
155 the handlers. */
156
157 void
158 epiphany_cgen_print_operand (CGEN_CPU_DESC cd,
159 int opindex,
160 void * xinfo,
161 CGEN_FIELDS *fields,
162 void const *attrs ATTRIBUTE_UNUSED,
163 bfd_vma pc,
164 int length)
165 {
166 disassemble_info *info = (disassemble_info *) xinfo;
167
168 switch (opindex)
169 {
170 case EPIPHANY_OPERAND_DIRECTION :
171 print_postindex (cd, info, fields->f_addsubx, 0, pc, length);
172 break;
173 case EPIPHANY_OPERAND_DISP11 :
174 print_uimm_not_reg (cd, info, fields->f_disp11, 0|(1<<CGEN_OPERAND_VIRTUAL), pc, length);
175 break;
176 case EPIPHANY_OPERAND_DISP3 :
177 print_normal (cd, info, fields->f_disp3, 0, pc, length);
178 break;
179 case EPIPHANY_OPERAND_DPMI :
180 print_postindex (cd, info, fields->f_subd, 0, pc, length);
181 break;
182 case EPIPHANY_OPERAND_FRD :
183 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rd, 0);
184 break;
185 case EPIPHANY_OPERAND_FRD6 :
186 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rd6, 0|(1<<CGEN_OPERAND_VIRTUAL));
187 break;
188 case EPIPHANY_OPERAND_FRM :
189 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rm, 0);
190 break;
191 case EPIPHANY_OPERAND_FRM6 :
192 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rm6, 0|(1<<CGEN_OPERAND_VIRTUAL));
193 break;
194 case EPIPHANY_OPERAND_FRN :
195 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rn, 0);
196 break;
197 case EPIPHANY_OPERAND_FRN6 :
198 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rn6, 0|(1<<CGEN_OPERAND_VIRTUAL));
199 break;
200 case EPIPHANY_OPERAND_IMM16 :
201 print_address (cd, info, fields->f_imm16, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_VIRTUAL), pc, length);
202 break;
203 case EPIPHANY_OPERAND_IMM8 :
204 print_address (cd, info, fields->f_imm8, 0|(1<<CGEN_OPERAND_RELAX), pc, length);
205 break;
206 case EPIPHANY_OPERAND_RD :
207 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rd, 0);
208 break;
209 case EPIPHANY_OPERAND_RD6 :
210 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rd6, 0|(1<<CGEN_OPERAND_VIRTUAL));
211 break;
212 case EPIPHANY_OPERAND_RM :
213 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rm, 0);
214 break;
215 case EPIPHANY_OPERAND_RM6 :
216 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rm6, 0|(1<<CGEN_OPERAND_VIRTUAL));
217 break;
218 case EPIPHANY_OPERAND_RN :
219 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rn, 0);
220 break;
221 case EPIPHANY_OPERAND_RN6 :
222 print_keyword (cd, info, & epiphany_cgen_opval_gr_names, fields->f_rn6, 0|(1<<CGEN_OPERAND_VIRTUAL));
223 break;
224 case EPIPHANY_OPERAND_SD :
225 print_keyword (cd, info, & epiphany_cgen_opval_cr_names, fields->f_sd, 0);
226 break;
227 case EPIPHANY_OPERAND_SD6 :
228 print_keyword (cd, info, & epiphany_cgen_opval_cr_names, fields->f_sd6, 0|(1<<CGEN_OPERAND_VIRTUAL));
229 break;
230 case EPIPHANY_OPERAND_SDDMA :
231 print_keyword (cd, info, & epiphany_cgen_opval_crdma_names, fields->f_sd6, 0|(1<<CGEN_OPERAND_VIRTUAL));
232 break;
233 case EPIPHANY_OPERAND_SDMEM :
234 print_keyword (cd, info, & epiphany_cgen_opval_crmem_names, fields->f_sd6, 0|(1<<CGEN_OPERAND_VIRTUAL));
235 break;
236 case EPIPHANY_OPERAND_SDMESH :
237 print_keyword (cd, info, & epiphany_cgen_opval_crmesh_names, fields->f_sd6, 0|(1<<CGEN_OPERAND_VIRTUAL));
238 break;
239 case EPIPHANY_OPERAND_SHIFT :
240 print_normal (cd, info, fields->f_shift, 0, pc, length);
241 break;
242 case EPIPHANY_OPERAND_SIMM11 :
243 print_simm_not_reg (cd, info, fields->f_sdisp11, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_VIRTUAL), pc, length);
244 break;
245 case EPIPHANY_OPERAND_SIMM24 :
246 print_address (cd, info, fields->f_simm24, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
247 break;
248 case EPIPHANY_OPERAND_SIMM3 :
249 print_simm_not_reg (cd, info, fields->f_sdisp3, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_RELAX), pc, length);
250 break;
251 case EPIPHANY_OPERAND_SIMM8 :
252 print_address (cd, info, fields->f_simm8, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
253 break;
254 case EPIPHANY_OPERAND_SN :
255 print_keyword (cd, info, & epiphany_cgen_opval_cr_names, fields->f_sn, 0);
256 break;
257 case EPIPHANY_OPERAND_SN6 :
258 print_keyword (cd, info, & epiphany_cgen_opval_cr_names, fields->f_sn6, 0|(1<<CGEN_OPERAND_VIRTUAL));
259 break;
260 case EPIPHANY_OPERAND_SNDMA :
261 print_keyword (cd, info, & epiphany_cgen_opval_crdma_names, fields->f_sn6, 0|(1<<CGEN_OPERAND_VIRTUAL));
262 break;
263 case EPIPHANY_OPERAND_SNMEM :
264 print_keyword (cd, info, & epiphany_cgen_opval_crmem_names, fields->f_sn6, 0|(1<<CGEN_OPERAND_VIRTUAL));
265 break;
266 case EPIPHANY_OPERAND_SNMESH :
267 print_keyword (cd, info, & epiphany_cgen_opval_crmesh_names, fields->f_sn6, 0|(1<<CGEN_OPERAND_VIRTUAL));
268 break;
269 case EPIPHANY_OPERAND_SWI_NUM :
270 print_uimm_not_reg (cd, info, fields->f_trap_num, 0, pc, length);
271 break;
272 case EPIPHANY_OPERAND_TRAPNUM6 :
273 print_normal (cd, info, fields->f_trap_num, 0, pc, length);
274 break;
275
276 default :
277 /* xgettext:c-format */
278 opcodes_error_handler
279 (_("internal error: unrecognized field %d while printing insn"),
280 opindex);
281 abort ();
282 }
283 }
284
285 cgen_print_fn * const epiphany_cgen_print_handlers[] =
286 {
287 print_insn_normal,
288 };
289
290
291 void
292 epiphany_cgen_init_dis (CGEN_CPU_DESC cd)
293 {
294 epiphany_cgen_init_opcode_table (cd);
295 epiphany_cgen_init_ibld_table (cd);
296 cd->print_handlers = & epiphany_cgen_print_handlers[0];
297 cd->print_operand = epiphany_cgen_print_operand;
298 }
299
300
301 /* Default print handler. */
302
303 static void
304 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
305 void *dis_info,
306 long value,
307 unsigned int attrs,
308 bfd_vma pc ATTRIBUTE_UNUSED,
309 int length ATTRIBUTE_UNUSED)
310 {
311 disassemble_info *info = (disassemble_info *) dis_info;
312
313 /* Print the operand as directed by the attributes. */
314 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
315 ; /* nothing to do */
316 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
317 (*info->fprintf_func) (info->stream, "%ld", value);
318 else
319 (*info->fprintf_func) (info->stream, "0x%lx", value);
320 }
321
322 /* Default address handler. */
323
324 static void
325 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
326 void *dis_info,
327 bfd_vma value,
328 unsigned int attrs,
329 bfd_vma pc ATTRIBUTE_UNUSED,
330 int length ATTRIBUTE_UNUSED)
331 {
332 disassemble_info *info = (disassemble_info *) dis_info;
333
334 /* Print the operand as directed by the attributes. */
335 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
336 ; /* Nothing to do. */
337 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
338 (*info->print_address_func) (value, info);
339 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
340 (*info->print_address_func) (value, info);
341 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
342 (*info->fprintf_func) (info->stream, "%ld", (long) value);
343 else
344 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
345 }
346
347 /* Keyword print handler. */
348
349 static void
350 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
351 void *dis_info,
352 CGEN_KEYWORD *keyword_table,
353 long value,
354 unsigned int attrs ATTRIBUTE_UNUSED)
355 {
356 disassemble_info *info = (disassemble_info *) dis_info;
357 const CGEN_KEYWORD_ENTRY *ke;
358
359 ke = cgen_keyword_lookup_value (keyword_table, value);
360 if (ke != NULL)
361 (*info->fprintf_func) (info->stream, "%s", ke->name);
362 else
363 (*info->fprintf_func) (info->stream, "???");
364 }
365
366 /* Default insn printer.
367
368 DIS_INFO is defined as `void *' so the disassembler needn't know anything
369 about disassemble_info. */
370
371 static void
372 print_insn_normal (CGEN_CPU_DESC cd,
373 void *dis_info,
374 const CGEN_INSN *insn,
375 CGEN_FIELDS *fields,
376 bfd_vma pc,
377 int length)
378 {
379 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
380 disassemble_info *info = (disassemble_info *) dis_info;
381 const CGEN_SYNTAX_CHAR_TYPE *syn;
382
383 CGEN_INIT_PRINT (cd);
384
385 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
386 {
387 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
388 {
389 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
390 continue;
391 }
392 if (CGEN_SYNTAX_CHAR_P (*syn))
393 {
394 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
395 continue;
396 }
397
398 /* We have an operand. */
399 epiphany_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
400 fields, CGEN_INSN_ATTRS (insn), pc, length);
401 }
402 }
403
404 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
405 the extract info.
406 Returns 0 if all is well, non-zero otherwise. */
407
408 static int
409 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
410 bfd_vma pc,
411 disassemble_info *info,
412 bfd_byte *buf,
413 int buflen,
414 CGEN_EXTRACT_INFO *ex_info,
415 unsigned long *insn_value)
416 {
417 int status = (*info->read_memory_func) (pc, buf, buflen, info);
418
419 if (status != 0)
420 {
421 (*info->memory_error_func) (status, pc, info);
422 return -1;
423 }
424
425 ex_info->dis_info = info;
426 ex_info->valid = (1 << buflen) - 1;
427 ex_info->insn_bytes = buf;
428
429 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
430 return 0;
431 }
432
433 /* Utility to print an insn.
434 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
435 The result is the size of the insn in bytes or zero for an unknown insn
436 or -1 if an error occurs fetching data (memory_error_func will have
437 been called). */
438
439 static int
440 print_insn (CGEN_CPU_DESC cd,
441 bfd_vma pc,
442 disassemble_info *info,
443 bfd_byte *buf,
444 unsigned int buflen)
445 {
446 CGEN_INSN_INT insn_value;
447 const CGEN_INSN_LIST *insn_list;
448 CGEN_EXTRACT_INFO ex_info;
449 int basesize;
450
451 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
452 basesize = cd->base_insn_bitsize < buflen * 8 ?
453 cd->base_insn_bitsize : buflen * 8;
454 insn_value = cgen_get_insn_value (cd, buf, basesize, cd->insn_endian);
455
456
457 /* Fill in ex_info fields like read_insn would. Don't actually call
458 read_insn, since the incoming buffer is already read (and possibly
459 modified a la m32r). */
460 ex_info.valid = (1 << buflen) - 1;
461 ex_info.dis_info = info;
462 ex_info.insn_bytes = buf;
463
464 /* The instructions are stored in hash lists.
465 Pick the first one and keep trying until we find the right one. */
466
467 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
468 while (insn_list != NULL)
469 {
470 const CGEN_INSN *insn = insn_list->insn;
471 CGEN_FIELDS fields;
472 int length;
473 unsigned long insn_value_cropped;
474
475 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
476 /* Not needed as insn shouldn't be in hash lists if not supported. */
477 /* Supported by this cpu? */
478 if (! epiphany_cgen_insn_supported (cd, insn))
479 {
480 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
481 continue;
482 }
483 #endif
484
485 /* Basic bit mask must be correct. */
486 /* ??? May wish to allow target to defer this check until the extract
487 handler. */
488
489 /* Base size may exceed this instruction's size. Extract the
490 relevant part from the buffer. */
491 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
492 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
493 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
494 info->endian == BFD_ENDIAN_BIG);
495 else
496 insn_value_cropped = insn_value;
497
498 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
499 == CGEN_INSN_BASE_VALUE (insn))
500 {
501 /* Printing is handled in two passes. The first pass parses the
502 machine insn and extracts the fields. The second pass prints
503 them. */
504
505 /* Make sure the entire insn is loaded into insn_value, if it
506 can fit. */
507 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
508 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
509 {
510 unsigned long full_insn_value;
511 int rc = read_insn (cd, pc, info, buf,
512 CGEN_INSN_BITSIZE (insn) / 8,
513 & ex_info, & full_insn_value);
514 if (rc != 0)
515 return rc;
516 length = CGEN_EXTRACT_FN (cd, insn)
517 (cd, insn, &ex_info, full_insn_value, &fields, pc);
518 }
519 else
520 length = CGEN_EXTRACT_FN (cd, insn)
521 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
522
523 /* Length < 0 -> error. */
524 if (length < 0)
525 return length;
526 if (length > 0)
527 {
528 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
529 /* Length is in bits, result is in bytes. */
530 return length / 8;
531 }
532 }
533
534 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
535 }
536
537 return 0;
538 }
539
540 /* Default value for CGEN_PRINT_INSN.
541 The result is the size of the insn in bytes or zero for an unknown insn
542 or -1 if an error occured fetching bytes. */
543
544 #ifndef CGEN_PRINT_INSN
545 #define CGEN_PRINT_INSN default_print_insn
546 #endif
547
548 static int
549 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
550 {
551 bfd_byte buf[CGEN_MAX_INSN_SIZE];
552 int buflen;
553 int status;
554
555 /* Attempt to read the base part of the insn. */
556 buflen = cd->base_insn_bitsize / 8;
557 status = (*info->read_memory_func) (pc, buf, buflen, info);
558
559 /* Try again with the minimum part, if min < base. */
560 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
561 {
562 buflen = cd->min_insn_bitsize / 8;
563 status = (*info->read_memory_func) (pc, buf, buflen, info);
564 }
565
566 if (status != 0)
567 {
568 (*info->memory_error_func) (status, pc, info);
569 return -1;
570 }
571
572 return print_insn (cd, pc, info, buf, buflen);
573 }
574
575 /* Main entry point.
576 Print one instruction from PC on INFO->STREAM.
577 Return the size of the instruction (in bytes). */
578
579 typedef struct cpu_desc_list
580 {
581 struct cpu_desc_list *next;
582 CGEN_BITSET *isa;
583 int mach;
584 int endian;
585 int insn_endian;
586 CGEN_CPU_DESC cd;
587 } cpu_desc_list;
588
589 int
590 print_insn_epiphany (bfd_vma pc, disassemble_info *info)
591 {
592 static cpu_desc_list *cd_list = 0;
593 cpu_desc_list *cl = 0;
594 static CGEN_CPU_DESC cd = 0;
595 static CGEN_BITSET *prev_isa;
596 static int prev_mach;
597 static int prev_endian;
598 static int prev_insn_endian;
599 int length;
600 CGEN_BITSET *isa;
601 int mach;
602 int endian = (info->endian == BFD_ENDIAN_BIG
603 ? CGEN_ENDIAN_BIG
604 : CGEN_ENDIAN_LITTLE);
605 int insn_endian = (info->endian_code == BFD_ENDIAN_BIG
606 ? CGEN_ENDIAN_BIG
607 : CGEN_ENDIAN_LITTLE);
608 enum bfd_architecture arch;
609
610 /* ??? gdb will set mach but leave the architecture as "unknown" */
611 #ifndef CGEN_BFD_ARCH
612 #define CGEN_BFD_ARCH bfd_arch_epiphany
613 #endif
614 arch = info->arch;
615 if (arch == bfd_arch_unknown)
616 arch = CGEN_BFD_ARCH;
617
618 /* There's no standard way to compute the machine or isa number
619 so we leave it to the target. */
620 #ifdef CGEN_COMPUTE_MACH
621 mach = CGEN_COMPUTE_MACH (info);
622 #else
623 mach = info->mach;
624 #endif
625
626 #ifdef CGEN_COMPUTE_ISA
627 {
628 static CGEN_BITSET *permanent_isa;
629
630 if (!permanent_isa)
631 permanent_isa = cgen_bitset_create (MAX_ISAS);
632 isa = permanent_isa;
633 cgen_bitset_clear (isa);
634 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
635 }
636 #else
637 isa = info->private_data;
638 #endif
639
640 /* If we've switched cpu's, try to find a handle we've used before */
641 if (cd
642 && (cgen_bitset_compare (isa, prev_isa) != 0
643 || mach != prev_mach
644 || endian != prev_endian))
645 {
646 cd = 0;
647 for (cl = cd_list; cl; cl = cl->next)
648 {
649 if (cgen_bitset_compare (cl->isa, isa) == 0 &&
650 cl->mach == mach &&
651 cl->endian == endian)
652 {
653 cd = cl->cd;
654 prev_isa = cd->isas;
655 break;
656 }
657 }
658 }
659
660 /* If we haven't initialized yet, initialize the opcode table. */
661 if (! cd)
662 {
663 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
664 const char *mach_name;
665
666 if (!arch_type)
667 abort ();
668 mach_name = arch_type->printable_name;
669
670 prev_isa = cgen_bitset_copy (isa);
671 prev_mach = mach;
672 prev_endian = endian;
673 prev_insn_endian = insn_endian;
674 cd = epiphany_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
675 CGEN_CPU_OPEN_BFDMACH, mach_name,
676 CGEN_CPU_OPEN_ENDIAN, prev_endian,
677 CGEN_CPU_OPEN_INSN_ENDIAN, prev_insn_endian,
678 CGEN_CPU_OPEN_END);
679 if (!cd)
680 abort ();
681
682 /* Save this away for future reference. */
683 cl = xmalloc (sizeof (struct cpu_desc_list));
684 cl->cd = cd;
685 cl->isa = prev_isa;
686 cl->mach = mach;
687 cl->endian = endian;
688 cl->next = cd_list;
689 cd_list = cl;
690
691 epiphany_cgen_init_dis (cd);
692 }
693
694 /* We try to have as much common code as possible.
695 But at this point some targets need to take over. */
696 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
697 but if not possible try to move this hook elsewhere rather than
698 have two hooks. */
699 length = CGEN_PRINT_INSN (cd, pc, info);
700 if (length > 0)
701 return length;
702 if (length < 0)
703 return -1;
704
705 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
706 return cd->default_insn_bitsize / 8;
707 }