1 /* Disassembler interface for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
4 THIS FILE IS MACHINE GENERATED WITH CGEN.
5 - the resultant file is machine generated, cgen-dis.in isn't
7 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002
8 Free Software Foundation, Inc.
10 This file is part of the GNU Binutils and GDB, the GNU debugger.
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)
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.
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. */
26 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
35 #include "libiberty.h"
36 #include "m32r-desc.h"
40 /* Default text to print if an instruction isn't recognized. */
41 #define UNKNOWN_INSN_MSG _("*unknown*")
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);
47 static void print_keyword
48 (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int);
49 static void print_insn_normal
50 (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int);
52 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, char *, unsigned);
53 static int default_print_insn
54 (CGEN_CPU_DESC, bfd_vma, disassemble_info *);
56 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, char *, int, CGEN_EXTRACT_INFO *,
59 /* -- disassembler routines inserted here */
62 static void print_hash PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned, bfd_vma, int));
63 static int my_print_insn PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *));
65 /* Immediate values are prefixed with '#'. */
67 #define CGEN_PRINT_NORMAL(cd, info, value, attrs, pc, length) \
70 if (CGEN_BOOL_ATTR ((attrs), CGEN_OPERAND_HASH_PREFIX)) \
71 (*info->fprintf_func) (info->stream, "#"); \
75 /* Handle '#' prefixes as operands. */
78 print_hash (cd, dis_info, value, attrs, pc, length)
79 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
81 long value ATTRIBUTE_UNUSED;
82 unsigned int attrs ATTRIBUTE_UNUSED;
83 bfd_vma pc ATTRIBUTE_UNUSED;
84 int length ATTRIBUTE_UNUSED;
86 disassemble_info *info = (disassemble_info *) dis_info;
87 (*info->fprintf_func) (info->stream, "#");
90 #undef CGEN_PRINT_INSN
91 #define CGEN_PRINT_INSN my_print_insn
94 my_print_insn (cd, pc, info)
97 disassemble_info *info;
99 char buffer[CGEN_MAX_INSN_SIZE];
102 int buflen = (pc & 3) == 0 ? 4 : 2;
103 int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
106 /* Read the base part of the insn. */
108 status = (*info->read_memory_func) (pc, buf, buflen, info);
111 (*info->memory_error_func) (status, pc, info);
116 x = (big_p ? &buf[0] : &buf[3]);
117 if ((pc & 3) == 0 && (*x & 0x80) != 0)
118 return print_insn (cd, pc, info, buf, buflen);
120 /* Print the first insn. */
121 buf += (big_p ? 0 : 2);
124 if (print_insn (cd, pc, info, buf, 2) == 0)
125 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
127 buf += (big_p ? 2 : -2);
129 x = (big_p ? &buf[0] : &buf[1]);
133 (*info->fprintf_func) (info->stream, " || ");
137 (*info->fprintf_func) (info->stream, " -> ");
139 /* The "& 3" is to pass a consistent address.
140 Parallel insns arguably both begin on the word boundary.
141 Also, branch insns are calculated relative to the word boundary. */
142 if (print_insn (cd, pc & ~ (bfd_vma) 3, info, buf, 2) == 0)
143 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
145 return (pc & 3) ? 2 : 4;
150 void m32r_cgen_print_operand
151 PARAMS ((CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *,
152 void const *, bfd_vma, int));
154 /* Main entry point for printing operands.
155 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
156 of dis-asm.h on cgen.h.
158 This function is basically just a big switch statement. Earlier versions
159 used tables to look up the function to use, but
160 - if the table contains both assembler and disassembler functions then
161 the disassembler contains much of the assembler and vice-versa,
162 - there's a lot of inlining possibilities as things grow,
163 - using a switch statement avoids the function call overhead.
165 This function could be moved into `print_insn_normal', but keeping it
166 separate makes clear the interface between `print_insn_normal' and each of
170 m32r_cgen_print_operand (cd, opindex, xinfo, fields, attrs, pc, length)
175 void const *attrs ATTRIBUTE_UNUSED;
179 disassemble_info *info = (disassemble_info *) xinfo;
183 case M32R_OPERAND_ACC :
184 print_keyword (cd, info, & m32r_cgen_opval_h_accums, fields->f_acc, 0);
186 case M32R_OPERAND_ACCD :
187 print_keyword (cd, info, & m32r_cgen_opval_h_accums, fields->f_accd, 0);
189 case M32R_OPERAND_ACCS :
190 print_keyword (cd, info, & m32r_cgen_opval_h_accums, fields->f_accs, 0);
192 case M32R_OPERAND_DCR :
193 print_keyword (cd, info, & m32r_cgen_opval_cr_names, fields->f_r1, 0);
195 case M32R_OPERAND_DISP16 :
196 print_address (cd, info, fields->f_disp16, 0|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
198 case M32R_OPERAND_DISP24 :
199 print_address (cd, info, fields->f_disp24, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
201 case M32R_OPERAND_DISP8 :
202 print_address (cd, info, fields->f_disp8, 0|(1<<CGEN_OPERAND_RELAX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_PCREL_ADDR), pc, length);
204 case M32R_OPERAND_DR :
205 print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r1, 0);
207 case M32R_OPERAND_HASH :
208 print_hash (cd, info, 0, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
210 case M32R_OPERAND_HI16 :
211 print_normal (cd, info, fields->f_hi16, 0|(1<<CGEN_OPERAND_SIGN_OPT), pc, length);
213 case M32R_OPERAND_IMM1 :
214 print_normal (cd, info, fields->f_imm1, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
216 case M32R_OPERAND_SCR :
217 print_keyword (cd, info, & m32r_cgen_opval_cr_names, fields->f_r2, 0);
219 case M32R_OPERAND_SIMM16 :
220 print_normal (cd, info, fields->f_simm16, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
222 case M32R_OPERAND_SIMM8 :
223 print_normal (cd, info, fields->f_simm8, 0|(1<<CGEN_OPERAND_SIGNED)|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
225 case M32R_OPERAND_SLO16 :
226 print_normal (cd, info, fields->f_simm16, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
228 case M32R_OPERAND_SR :
229 print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r2, 0);
231 case M32R_OPERAND_SRC1 :
232 print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r1, 0);
234 case M32R_OPERAND_SRC2 :
235 print_keyword (cd, info, & m32r_cgen_opval_gr_names, fields->f_r2, 0);
237 case M32R_OPERAND_UIMM16 :
238 print_normal (cd, info, fields->f_uimm16, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
240 case M32R_OPERAND_UIMM24 :
241 print_address (cd, info, fields->f_uimm24, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_RELOC)|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
243 case M32R_OPERAND_UIMM3 :
244 print_normal (cd, info, fields->f_uimm3, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
246 case M32R_OPERAND_UIMM4 :
247 print_normal (cd, info, fields->f_uimm4, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
249 case M32R_OPERAND_UIMM5 :
250 print_normal (cd, info, fields->f_uimm5, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
252 case M32R_OPERAND_UIMM8 :
253 print_normal (cd, info, fields->f_uimm8, 0|(1<<CGEN_OPERAND_HASH_PREFIX), pc, length);
255 case M32R_OPERAND_ULO16 :
256 print_normal (cd, info, fields->f_uimm16, 0, pc, length);
260 /* xgettext:c-format */
261 fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
267 cgen_print_fn * const m32r_cgen_print_handlers[] =
274 m32r_cgen_init_dis (cd)
277 m32r_cgen_init_opcode_table (cd);
278 m32r_cgen_init_ibld_table (cd);
279 cd->print_handlers = & m32r_cgen_print_handlers[0];
280 cd->print_operand = m32r_cgen_print_operand;
284 /* Default print handler. */
287 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
291 bfd_vma pc ATTRIBUTE_UNUSED,
292 int length ATTRIBUTE_UNUSED)
294 disassemble_info *info = (disassemble_info *) dis_info;
296 #ifdef CGEN_PRINT_NORMAL
297 CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
300 /* Print the operand as directed by the attributes. */
301 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
302 ; /* nothing to do */
303 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
304 (*info->fprintf_func) (info->stream, "%ld", value);
306 (*info->fprintf_func) (info->stream, "0x%lx", value);
309 /* Default address handler. */
312 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
316 bfd_vma pc ATTRIBUTE_UNUSED,
317 int length ATTRIBUTE_UNUSED)
319 disassemble_info *info = (disassemble_info *) dis_info;
321 #ifdef CGEN_PRINT_ADDRESS
322 CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
325 /* Print the operand as directed by the attributes. */
326 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
327 ; /* nothing to do */
328 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
329 (*info->print_address_func) (value, info);
330 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
331 (*info->print_address_func) (value, info);
332 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
333 (*info->fprintf_func) (info->stream, "%ld", (long) value);
335 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
338 /* Keyword print handler. */
341 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
343 CGEN_KEYWORD *keyword_table,
345 unsigned int attrs ATTRIBUTE_UNUSED)
347 disassemble_info *info = (disassemble_info *) dis_info;
348 const CGEN_KEYWORD_ENTRY *ke;
350 ke = cgen_keyword_lookup_value (keyword_table, value);
352 (*info->fprintf_func) (info->stream, "%s", ke->name);
354 (*info->fprintf_func) (info->stream, "???");
357 /* Default insn printer.
359 DIS_INFO is defined as `void *' so the disassembler needn't know anything
360 about disassemble_info. */
363 print_insn_normal (CGEN_CPU_DESC cd,
365 const CGEN_INSN *insn,
370 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
371 disassemble_info *info = (disassemble_info *) dis_info;
372 const CGEN_SYNTAX_CHAR_TYPE *syn;
374 CGEN_INIT_PRINT (cd);
376 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
378 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
380 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
383 if (CGEN_SYNTAX_CHAR_P (*syn))
385 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
389 /* We have an operand. */
390 m32r_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
391 fields, CGEN_INSN_ATTRS (insn), pc, length);
395 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
397 Returns 0 if all is well, non-zero otherwise. */
400 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
402 disassemble_info *info,
405 CGEN_EXTRACT_INFO *ex_info,
406 unsigned long *insn_value)
408 int status = (*info->read_memory_func) (pc, buf, buflen, info);
411 (*info->memory_error_func) (status, pc, info);
415 ex_info->dis_info = info;
416 ex_info->valid = (1 << buflen) - 1;
417 ex_info->insn_bytes = buf;
419 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
423 /* Utility to print an insn.
424 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
425 The result is the size of the insn in bytes or zero for an unknown insn
426 or -1 if an error occurs fetching data (memory_error_func will have
430 print_insn (CGEN_CPU_DESC cd,
432 disassemble_info *info,
436 CGEN_INSN_INT insn_value;
437 const CGEN_INSN_LIST *insn_list;
438 CGEN_EXTRACT_INFO ex_info;
441 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
442 basesize = cd->base_insn_bitsize < buflen * 8 ?
443 cd->base_insn_bitsize : buflen * 8;
444 insn_value = cgen_get_insn_value (cd, buf, basesize);
447 /* Fill in ex_info fields like read_insn would. Don't actually call
448 read_insn, since the incoming buffer is already read (and possibly
449 modified a la m32r). */
450 ex_info.valid = (1 << buflen) - 1;
451 ex_info.dis_info = info;
452 ex_info.insn_bytes = buf;
454 /* The instructions are stored in hash lists.
455 Pick the first one and keep trying until we find the right one. */
457 insn_list = CGEN_DIS_LOOKUP_INSN (cd, buf, insn_value);
458 while (insn_list != NULL)
460 const CGEN_INSN *insn = insn_list->insn;
463 unsigned long insn_value_cropped;
465 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
466 /* Not needed as insn shouldn't be in hash lists if not supported. */
467 /* Supported by this cpu? */
468 if (! m32r_cgen_insn_supported (cd, insn))
470 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
475 /* Basic bit mask must be correct. */
476 /* ??? May wish to allow target to defer this check until the extract
479 /* Base size may exceed this instruction's size. Extract the
480 relevant part from the buffer. */
481 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
482 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
483 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
484 info->endian == BFD_ENDIAN_BIG);
486 insn_value_cropped = insn_value;
488 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
489 == CGEN_INSN_BASE_VALUE (insn))
491 /* Printing is handled in two passes. The first pass parses the
492 machine insn and extracts the fields. The second pass prints
495 /* Make sure the entire insn is loaded into insn_value, if it
497 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
498 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
500 unsigned long full_insn_value;
501 int rc = read_insn (cd, pc, info, buf,
502 CGEN_INSN_BITSIZE (insn) / 8,
503 & ex_info, & full_insn_value);
506 length = CGEN_EXTRACT_FN (cd, insn)
507 (cd, insn, &ex_info, full_insn_value, &fields, pc);
510 length = CGEN_EXTRACT_FN (cd, insn)
511 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
513 /* length < 0 -> error */
518 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
519 /* length is in bits, result is in bytes */
524 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
530 /* Default value for CGEN_PRINT_INSN.
531 The result is the size of the insn in bytes or zero for an unknown insn
532 or -1 if an error occured fetching bytes. */
534 #ifndef CGEN_PRINT_INSN
535 #define CGEN_PRINT_INSN default_print_insn
539 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
541 char buf[CGEN_MAX_INSN_SIZE];
545 /* Attempt to read the base part of the insn. */
546 buflen = cd->base_insn_bitsize / 8;
547 status = (*info->read_memory_func) (pc, buf, buflen, info);
549 /* Try again with the minimum part, if min < base. */
550 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
552 buflen = cd->min_insn_bitsize / 8;
553 status = (*info->read_memory_func) (pc, buf, buflen, info);
558 (*info->memory_error_func) (status, pc, info);
562 return print_insn (cd, pc, info, buf, buflen);
566 Print one instruction from PC on INFO->STREAM.
567 Return the size of the instruction (in bytes). */
569 typedef struct cpu_desc_list {
570 struct cpu_desc_list *next;
578 print_insn_m32r (bfd_vma pc, disassemble_info *info)
580 static cpu_desc_list *cd_list = 0;
581 cpu_desc_list *cl = 0;
582 static CGEN_CPU_DESC cd = 0;
584 static int prev_mach;
585 static int prev_endian;
588 int endian = (info->endian == BFD_ENDIAN_BIG
590 : CGEN_ENDIAN_LITTLE);
591 enum bfd_architecture arch;
593 /* ??? gdb will set mach but leave the architecture as "unknown" */
594 #ifndef CGEN_BFD_ARCH
595 #define CGEN_BFD_ARCH bfd_arch_m32r
598 if (arch == bfd_arch_unknown)
599 arch = CGEN_BFD_ARCH;
601 /* There's no standard way to compute the machine or isa number
602 so we leave it to the target. */
603 #ifdef CGEN_COMPUTE_MACH
604 mach = CGEN_COMPUTE_MACH (info);
609 #ifdef CGEN_COMPUTE_ISA
610 isa = CGEN_COMPUTE_ISA (info);
612 isa = info->insn_sets;
615 /* If we've switched cpu's, try to find a handle we've used before */
619 || endian != prev_endian))
622 for (cl = cd_list; cl; cl = cl->next)
624 if (cl->isa == isa &&
626 cl->endian == endian)
634 /* If we haven't initialized yet, initialize the opcode table. */
637 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
638 const char *mach_name;
642 mach_name = arch_type->printable_name;
646 prev_endian = endian;
647 cd = m32r_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
648 CGEN_CPU_OPEN_BFDMACH, mach_name,
649 CGEN_CPU_OPEN_ENDIAN, prev_endian,
654 /* save this away for future reference */
655 cl = xmalloc (sizeof (struct cpu_desc_list));
663 m32r_cgen_init_dis (cd);
666 /* We try to have as much common code as possible.
667 But at this point some targets need to take over. */
668 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
669 but if not possible try to move this hook elsewhere rather than
671 length = CGEN_PRINT_INSN (cd, pc, info);
677 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
678 return cd->default_insn_bitsize / 8;