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) 1996-2022 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 "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 (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 static void
print_fr(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,long value,unsigned int attrs ATTRIBUTE_UNUSED,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)64 print_fr (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
65 void * dis_info,
66 long value,
67 unsigned int attrs ATTRIBUTE_UNUSED,
68 bfd_vma pc ATTRIBUTE_UNUSED,
69 int length ATTRIBUTE_UNUSED)
70 {
71 disassemble_info *info = (disassemble_info *) dis_info;
72 const CGEN_KEYWORD_ENTRY *ke;
73 extern CGEN_KEYWORD ip2k_cgen_opval_register_names;
74 long offsettest;
75 long offsetvalue;
76
77 if (value == 0) /* This is (IP). */
78 {
79 (*info->fprintf_func) (info->stream, "%s", "(IP)");
80 return;
81 }
82
83 offsettest = value >> 7;
84 offsetvalue = value & 0x7F;
85
86 /* Check to see if first two bits are 10 -> (DP). */
87 if (offsettest == 2)
88 {
89 if (offsetvalue == 0)
90 (*info->fprintf_func) (info->stream, "%s","(DP)");
91 else
92 (*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue, "(DP)");
93 return;
94 }
95
96 /* Check to see if first two bits are 11 -> (SP). */
97 if (offsettest == 3)
98 {
99 if (offsetvalue == 0)
100 (*info->fprintf_func) (info->stream, "%s", "(SP)");
101 else
102 (*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue,"(SP)");
103 return;
104 }
105
106 /* Attempt to print as a register keyword. */
107 ke = cgen_keyword_lookup_value (& ip2k_cgen_opval_register_names, value);
108
109 if (ke != NULL)
110 (*info->fprintf_func) (info->stream, "%s", ke->name);
111 else
112 /* Print as an address literal. */
113 (*info->fprintf_func) (info->stream, "$%02lx", value);
114 }
115
116 static void
print_dollarhex(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,long value,unsigned int attrs ATTRIBUTE_UNUSED,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)117 print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
118 void * dis_info,
119 long value,
120 unsigned int attrs ATTRIBUTE_UNUSED,
121 bfd_vma pc ATTRIBUTE_UNUSED,
122 int length ATTRIBUTE_UNUSED)
123 {
124 disassemble_info *info = (disassemble_info *) dis_info;
125
126 (*info->fprintf_func) (info->stream, "$%lx", value);
127 }
128
129 static void
print_dollarhex8(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,long value,unsigned int attrs ATTRIBUTE_UNUSED,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)130 print_dollarhex8 (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
131 void * dis_info,
132 long value,
133 unsigned int attrs ATTRIBUTE_UNUSED,
134 bfd_vma pc ATTRIBUTE_UNUSED,
135 int length ATTRIBUTE_UNUSED)
136 {
137 disassemble_info *info = (disassemble_info *) dis_info;
138
139 (*info->fprintf_func) (info->stream, "$%02lx", value);
140 }
141
142 static void
print_dollarhex_addr16h(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,long value,unsigned int attrs ATTRIBUTE_UNUSED,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)143 print_dollarhex_addr16h (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
144 void * dis_info,
145 long value,
146 unsigned int attrs ATTRIBUTE_UNUSED,
147 bfd_vma pc ATTRIBUTE_UNUSED,
148 int length ATTRIBUTE_UNUSED)
149 {
150 disassemble_info *info = (disassemble_info *) dis_info;
151
152 /* This is a loadh instruction. Shift the value to the left
153 by 8 bits so that disassembled code will reassemble properly. */
154 value = ((value << 8) & 0xFF00);
155
156 (*info->fprintf_func) (info->stream, "$%04lx", value);
157 }
158
159 static void
print_dollarhex_addr16l(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,long value,unsigned int attrs ATTRIBUTE_UNUSED,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)160 print_dollarhex_addr16l (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
161 void * dis_info,
162 long value,
163 unsigned int attrs ATTRIBUTE_UNUSED,
164 bfd_vma pc ATTRIBUTE_UNUSED,
165 int length ATTRIBUTE_UNUSED)
166 {
167 disassemble_info *info = (disassemble_info *) dis_info;
168
169 (*info->fprintf_func) (info->stream, "$%04lx", value);
170 }
171
172 static void
print_dollarhex_p(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,long value,unsigned int attrs ATTRIBUTE_UNUSED,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)173 print_dollarhex_p (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
174 void * dis_info,
175 long value,
176 unsigned int attrs ATTRIBUTE_UNUSED,
177 bfd_vma pc ATTRIBUTE_UNUSED,
178 int length ATTRIBUTE_UNUSED)
179 {
180 disassemble_info *info = (disassemble_info *) dis_info;
181
182 value = ((value << 14) & 0x1C000);
183 ;value = (value & 0x1FFFF);
184 (*info->fprintf_func) (info->stream, "$%05lx", value);
185 }
186
187 static void
print_dollarhex_cj(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,long value,unsigned int attrs ATTRIBUTE_UNUSED,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)188 print_dollarhex_cj (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
189 void * dis_info,
190 long value,
191 unsigned int attrs ATTRIBUTE_UNUSED,
192 bfd_vma pc ATTRIBUTE_UNUSED,
193 int length ATTRIBUTE_UNUSED)
194 {
195 disassemble_info *info = (disassemble_info *) dis_info;
196
197 value = ((value << 1) & 0x1FFFF);
198 (*info->fprintf_func) (info->stream, "$%05lx", value);
199 }
200
201 static void
print_decimal(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,long value,unsigned int attrs ATTRIBUTE_UNUSED,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)202 print_decimal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
203 void * dis_info,
204 long value,
205 unsigned int attrs ATTRIBUTE_UNUSED,
206 bfd_vma pc ATTRIBUTE_UNUSED,
207 int length ATTRIBUTE_UNUSED)
208 {
209 disassemble_info *info = (disassemble_info *) dis_info;
210
211 (*info->fprintf_func) (info->stream, "%ld", value);
212 }
213
214
215
216 /* -- */
217
218 void ip2k_cgen_print_operand
219 (CGEN_CPU_DESC, int, void *, CGEN_FIELDS *, void const *, bfd_vma, int);
220
221 /* Main entry point for printing operands.
222 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
223 of dis-asm.h on cgen.h.
224
225 This function is basically just a big switch statement. Earlier versions
226 used tables to look up the function to use, but
227 - if the table contains both assembler and disassembler functions then
228 the disassembler contains much of the assembler and vice-versa,
229 - there's a lot of inlining possibilities as things grow,
230 - using a switch statement avoids the function call overhead.
231
232 This function could be moved into `print_insn_normal', but keeping it
233 separate makes clear the interface between `print_insn_normal' and each of
234 the handlers. */
235
236 void
ip2k_cgen_print_operand(CGEN_CPU_DESC cd,int opindex,void * xinfo,CGEN_FIELDS * fields,void const * attrs ATTRIBUTE_UNUSED,bfd_vma pc,int length)237 ip2k_cgen_print_operand (CGEN_CPU_DESC cd,
238 int opindex,
239 void * xinfo,
240 CGEN_FIELDS *fields,
241 void const *attrs ATTRIBUTE_UNUSED,
242 bfd_vma pc,
243 int length)
244 {
245 disassemble_info *info = (disassemble_info *) xinfo;
246
247 switch (opindex)
248 {
249 case IP2K_OPERAND_ADDR16CJP :
250 print_dollarhex_cj (cd, info, fields->f_addr16cjp, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
251 break;
252 case IP2K_OPERAND_ADDR16H :
253 print_dollarhex_addr16h (cd, info, fields->f_imm8, 0, pc, length);
254 break;
255 case IP2K_OPERAND_ADDR16L :
256 print_dollarhex_addr16l (cd, info, fields->f_imm8, 0, pc, length);
257 break;
258 case IP2K_OPERAND_ADDR16P :
259 print_dollarhex_p (cd, info, fields->f_page3, 0, pc, length);
260 break;
261 case IP2K_OPERAND_BITNO :
262 print_decimal (cd, info, fields->f_bitno, 0, pc, length);
263 break;
264 case IP2K_OPERAND_CBIT :
265 print_normal (cd, info, 0, 0, pc, length);
266 break;
267 case IP2K_OPERAND_DCBIT :
268 print_normal (cd, info, 0, 0, pc, length);
269 break;
270 case IP2K_OPERAND_FR :
271 print_fr (cd, info, fields->f_reg, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
272 break;
273 case IP2K_OPERAND_LIT8 :
274 print_dollarhex8 (cd, info, fields->f_imm8, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
275 break;
276 case IP2K_OPERAND_PABITS :
277 print_normal (cd, info, 0, 0, pc, length);
278 break;
279 case IP2K_OPERAND_RETI3 :
280 print_dollarhex (cd, info, fields->f_reti3, 0, pc, length);
281 break;
282 case IP2K_OPERAND_ZBIT :
283 print_normal (cd, info, 0, 0, pc, length);
284 break;
285
286 default :
287 /* xgettext:c-format */
288 opcodes_error_handler
289 (_("internal error: unrecognized field %d while printing insn"),
290 opindex);
291 abort ();
292 }
293 }
294
295 cgen_print_fn * const ip2k_cgen_print_handlers[] =
296 {
297 print_insn_normal,
298 };
299
300
301 void
ip2k_cgen_init_dis(CGEN_CPU_DESC cd)302 ip2k_cgen_init_dis (CGEN_CPU_DESC cd)
303 {
304 ip2k_cgen_init_opcode_table (cd);
305 ip2k_cgen_init_ibld_table (cd);
306 cd->print_handlers = & ip2k_cgen_print_handlers[0];
307 cd->print_operand = ip2k_cgen_print_operand;
308 }
309
310
311 /* Default print handler. */
312
313 static void
print_normal(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,long value,unsigned int attrs,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)314 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
315 void *dis_info,
316 long value,
317 unsigned int attrs,
318 bfd_vma pc ATTRIBUTE_UNUSED,
319 int length ATTRIBUTE_UNUSED)
320 {
321 disassemble_info *info = (disassemble_info *) dis_info;
322
323 /* Print the operand as directed by the attributes. */
324 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
325 ; /* nothing to do */
326 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
327 (*info->fprintf_func) (info->stream, "%ld", value);
328 else
329 (*info->fprintf_func) (info->stream, "0x%lx", value);
330 }
331
332 /* Default address handler. */
333
334 static void
print_address(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,bfd_vma value,unsigned int attrs,bfd_vma pc ATTRIBUTE_UNUSED,int length ATTRIBUTE_UNUSED)335 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
336 void *dis_info,
337 bfd_vma value,
338 unsigned int attrs,
339 bfd_vma pc ATTRIBUTE_UNUSED,
340 int length ATTRIBUTE_UNUSED)
341 {
342 disassemble_info *info = (disassemble_info *) dis_info;
343
344 /* Print the operand as directed by the attributes. */
345 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
346 ; /* Nothing to do. */
347 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
348 (*info->print_address_func) (value, info);
349 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
350 (*info->print_address_func) (value, info);
351 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
352 (*info->fprintf_func) (info->stream, "%ld", (long) value);
353 else
354 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
355 }
356
357 /* Keyword print handler. */
358
359 static void
print_keyword(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,void * dis_info,CGEN_KEYWORD * keyword_table,long value,unsigned int attrs ATTRIBUTE_UNUSED)360 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
361 void *dis_info,
362 CGEN_KEYWORD *keyword_table,
363 long value,
364 unsigned int attrs ATTRIBUTE_UNUSED)
365 {
366 disassemble_info *info = (disassemble_info *) dis_info;
367 const CGEN_KEYWORD_ENTRY *ke;
368
369 ke = cgen_keyword_lookup_value (keyword_table, value);
370 if (ke != NULL)
371 (*info->fprintf_func) (info->stream, "%s", ke->name);
372 else
373 (*info->fprintf_func) (info->stream, "???");
374 }
375
376 /* Default insn printer.
377
378 DIS_INFO is defined as `void *' so the disassembler needn't know anything
379 about disassemble_info. */
380
381 static void
print_insn_normal(CGEN_CPU_DESC cd,void * dis_info,const CGEN_INSN * insn,CGEN_FIELDS * fields,bfd_vma pc,int length)382 print_insn_normal (CGEN_CPU_DESC cd,
383 void *dis_info,
384 const CGEN_INSN *insn,
385 CGEN_FIELDS *fields,
386 bfd_vma pc,
387 int length)
388 {
389 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
390 disassemble_info *info = (disassemble_info *) dis_info;
391 const CGEN_SYNTAX_CHAR_TYPE *syn;
392
393 CGEN_INIT_PRINT (cd);
394
395 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
396 {
397 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
398 {
399 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
400 continue;
401 }
402 if (CGEN_SYNTAX_CHAR_P (*syn))
403 {
404 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
405 continue;
406 }
407
408 /* We have an operand. */
409 ip2k_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
410 fields, CGEN_INSN_ATTRS (insn), pc, length);
411 }
412 }
413
414 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
415 the extract info.
416 Returns 0 if all is well, non-zero otherwise. */
417
418 static int
read_insn(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,bfd_vma pc,disassemble_info * info,bfd_byte * buf,int buflen,CGEN_EXTRACT_INFO * ex_info,unsigned long * insn_value)419 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
420 bfd_vma pc,
421 disassemble_info *info,
422 bfd_byte *buf,
423 int buflen,
424 CGEN_EXTRACT_INFO *ex_info,
425 unsigned long *insn_value)
426 {
427 int status = (*info->read_memory_func) (pc, buf, buflen, info);
428
429 if (status != 0)
430 {
431 (*info->memory_error_func) (status, pc, info);
432 return -1;
433 }
434
435 ex_info->dis_info = info;
436 ex_info->valid = (1 << buflen) - 1;
437 ex_info->insn_bytes = buf;
438
439 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
440 return 0;
441 }
442
443 /* Utility to print an insn.
444 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
445 The result is the size of the insn in bytes or zero for an unknown insn
446 or -1 if an error occurs fetching data (memory_error_func will have
447 been called). */
448
449 static int
print_insn(CGEN_CPU_DESC cd,bfd_vma pc,disassemble_info * info,bfd_byte * buf,unsigned int buflen)450 print_insn (CGEN_CPU_DESC cd,
451 bfd_vma pc,
452 disassemble_info *info,
453 bfd_byte *buf,
454 unsigned int buflen)
455 {
456 CGEN_INSN_INT insn_value;
457 const CGEN_INSN_LIST *insn_list;
458 CGEN_EXTRACT_INFO ex_info;
459 int basesize;
460
461 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
462 basesize = cd->base_insn_bitsize < buflen * 8 ?
463 cd->base_insn_bitsize : buflen * 8;
464 insn_value = cgen_get_insn_value (cd, buf, basesize, cd->insn_endian);
465
466
467 /* Fill in ex_info fields like read_insn would. Don't actually call
468 read_insn, since the incoming buffer is already read (and possibly
469 modified a la m32r). */
470 ex_info.valid = (1 << buflen) - 1;
471 ex_info.dis_info = info;
472 ex_info.insn_bytes = buf;
473
474 /* The instructions are stored in hash lists.
475 Pick the first one and keep trying until we find the right one. */
476
477 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
478 while (insn_list != NULL)
479 {
480 const CGEN_INSN *insn = insn_list->insn;
481 CGEN_FIELDS fields;
482 int length;
483 unsigned long insn_value_cropped;
484
485 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
486 /* Not needed as insn shouldn't be in hash lists if not supported. */
487 /* Supported by this cpu? */
488 if (! ip2k_cgen_insn_supported (cd, insn))
489 {
490 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
491 continue;
492 }
493 #endif
494
495 /* Basic bit mask must be correct. */
496 /* ??? May wish to allow target to defer this check until the extract
497 handler. */
498
499 /* Base size may exceed this instruction's size. Extract the
500 relevant part from the buffer. */
501 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
502 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
503 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
504 info->endian == BFD_ENDIAN_BIG);
505 else
506 insn_value_cropped = insn_value;
507
508 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
509 == CGEN_INSN_BASE_VALUE (insn))
510 {
511 /* Printing is handled in two passes. The first pass parses the
512 machine insn and extracts the fields. The second pass prints
513 them. */
514
515 /* Make sure the entire insn is loaded into insn_value, if it
516 can fit. */
517 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
518 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
519 {
520 unsigned long full_insn_value;
521 int rc = read_insn (cd, pc, info, buf,
522 CGEN_INSN_BITSIZE (insn) / 8,
523 & ex_info, & full_insn_value);
524 if (rc != 0)
525 return rc;
526 length = CGEN_EXTRACT_FN (cd, insn)
527 (cd, insn, &ex_info, full_insn_value, &fields, pc);
528 }
529 else
530 length = CGEN_EXTRACT_FN (cd, insn)
531 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
532
533 /* Length < 0 -> error. */
534 if (length < 0)
535 return length;
536 if (length > 0)
537 {
538 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
539 /* Length is in bits, result is in bytes. */
540 return length / 8;
541 }
542 }
543
544 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
545 }
546
547 return 0;
548 }
549
550 /* Default value for CGEN_PRINT_INSN.
551 The result is the size of the insn in bytes or zero for an unknown insn
552 or -1 if an error occured fetching bytes. */
553
554 #ifndef CGEN_PRINT_INSN
555 #define CGEN_PRINT_INSN default_print_insn
556 #endif
557
558 static int
default_print_insn(CGEN_CPU_DESC cd,bfd_vma pc,disassemble_info * info)559 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
560 {
561 bfd_byte buf[CGEN_MAX_INSN_SIZE];
562 int buflen;
563 int status;
564
565 /* Attempt to read the base part of the insn. */
566 buflen = cd->base_insn_bitsize / 8;
567 status = (*info->read_memory_func) (pc, buf, buflen, info);
568
569 /* Try again with the minimum part, if min < base. */
570 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
571 {
572 buflen = cd->min_insn_bitsize / 8;
573 status = (*info->read_memory_func) (pc, buf, buflen, info);
574 }
575
576 if (status != 0)
577 {
578 (*info->memory_error_func) (status, pc, info);
579 return -1;
580 }
581
582 return print_insn (cd, pc, info, buf, buflen);
583 }
584
585 /* Main entry point.
586 Print one instruction from PC on INFO->STREAM.
587 Return the size of the instruction (in bytes). */
588
589 typedef struct cpu_desc_list
590 {
591 struct cpu_desc_list *next;
592 CGEN_BITSET *isa;
593 int mach;
594 int endian;
595 int insn_endian;
596 CGEN_CPU_DESC cd;
597 } cpu_desc_list;
598
599 int
print_insn_ip2k(bfd_vma pc,disassemble_info * info)600 print_insn_ip2k (bfd_vma pc, disassemble_info *info)
601 {
602 static cpu_desc_list *cd_list = 0;
603 cpu_desc_list *cl = 0;
604 static CGEN_CPU_DESC cd = 0;
605 static CGEN_BITSET *prev_isa;
606 static int prev_mach;
607 static int prev_endian;
608 static int prev_insn_endian;
609 int length;
610 CGEN_BITSET *isa;
611 int mach;
612 int endian = (info->endian == BFD_ENDIAN_BIG
613 ? CGEN_ENDIAN_BIG
614 : CGEN_ENDIAN_LITTLE);
615 int insn_endian = (info->endian_code == BFD_ENDIAN_BIG
616 ? CGEN_ENDIAN_BIG
617 : CGEN_ENDIAN_LITTLE);
618 enum bfd_architecture arch;
619
620 /* ??? gdb will set mach but leave the architecture as "unknown" */
621 #ifndef CGEN_BFD_ARCH
622 #define CGEN_BFD_ARCH bfd_arch_ip2k
623 #endif
624 arch = info->arch;
625 if (arch == bfd_arch_unknown)
626 arch = CGEN_BFD_ARCH;
627
628 /* There's no standard way to compute the machine or isa number
629 so we leave it to the target. */
630 #ifdef CGEN_COMPUTE_MACH
631 mach = CGEN_COMPUTE_MACH (info);
632 #else
633 mach = info->mach;
634 #endif
635
636 #ifdef CGEN_COMPUTE_ISA
637 {
638 static CGEN_BITSET *permanent_isa;
639
640 if (!permanent_isa)
641 permanent_isa = cgen_bitset_create (MAX_ISAS);
642 isa = permanent_isa;
643 cgen_bitset_clear (isa);
644 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
645 }
646 #else
647 isa = info->private_data;
648 #endif
649
650 /* If we've switched cpu's, try to find a handle we've used before */
651 if (cd
652 && (cgen_bitset_compare (isa, prev_isa) != 0
653 || mach != prev_mach
654 || endian != prev_endian))
655 {
656 cd = 0;
657 for (cl = cd_list; cl; cl = cl->next)
658 {
659 if (cgen_bitset_compare (cl->isa, isa) == 0 &&
660 cl->mach == mach &&
661 cl->endian == endian)
662 {
663 cd = cl->cd;
664 prev_isa = cd->isas;
665 break;
666 }
667 }
668 }
669
670 /* If we haven't initialized yet, initialize the opcode table. */
671 if (! cd)
672 {
673 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
674 const char *mach_name;
675
676 if (!arch_type)
677 abort ();
678 mach_name = arch_type->printable_name;
679
680 prev_isa = cgen_bitset_copy (isa);
681 prev_mach = mach;
682 prev_endian = endian;
683 prev_insn_endian = insn_endian;
684 cd = ip2k_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
685 CGEN_CPU_OPEN_BFDMACH, mach_name,
686 CGEN_CPU_OPEN_ENDIAN, prev_endian,
687 CGEN_CPU_OPEN_INSN_ENDIAN, prev_insn_endian,
688 CGEN_CPU_OPEN_END);
689 if (!cd)
690 abort ();
691
692 /* Save this away for future reference. */
693 cl = xmalloc (sizeof (struct cpu_desc_list));
694 cl->cd = cd;
695 cl->isa = prev_isa;
696 cl->mach = mach;
697 cl->endian = endian;
698 cl->next = cd_list;
699 cd_list = cl;
700
701 ip2k_cgen_init_dis (cd);
702 }
703
704 /* We try to have as much common code as possible.
705 But at this point some targets need to take over. */
706 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
707 but if not possible try to move this hook elsewhere rather than
708 have two hooks. */
709 length = CGEN_PRINT_INSN (cd, pc, info);
710 if (length > 0)
711 return length;
712 if (length < 0)
713 return -1;
714
715 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
716 return cd->default_insn_bitsize / 8;
717 }
718