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, 2005
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 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
35 #include "libiberty.h"
36 #include "@prefix@-desc.h"
37 #include "@prefix@-opc.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) 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);
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;
56 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *,
59 /* -- disassembler routines inserted here. */
61 /* Default print handler. */
64 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
68 bfd_vma pc ATTRIBUTE_UNUSED,
69 int length ATTRIBUTE_UNUSED)
71 disassemble_info *info = (disassemble_info *) dis_info;
73 #ifdef CGEN_PRINT_NORMAL
74 CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
77 /* Print the operand as directed by the attributes. */
78 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
80 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
81 (*info->fprintf_func) (info->stream, "%ld", value);
83 (*info->fprintf_func) (info->stream, "0x%lx", value);
86 /* Default address handler. */
89 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
93 bfd_vma pc ATTRIBUTE_UNUSED,
94 int length ATTRIBUTE_UNUSED)
96 disassemble_info *info = (disassemble_info *) dis_info;
98 #ifdef CGEN_PRINT_ADDRESS
99 CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
102 /* Print the operand as directed by the attributes. */
103 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
104 ; /* Nothing to do. */
105 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
106 (*info->print_address_func) (value, info);
107 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
108 (*info->print_address_func) (value, info);
109 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
110 (*info->fprintf_func) (info->stream, "%ld", (long) value);
112 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
115 /* Keyword print handler. */
118 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
120 CGEN_KEYWORD *keyword_table,
122 unsigned int attrs ATTRIBUTE_UNUSED)
124 disassemble_info *info = (disassemble_info *) dis_info;
125 const CGEN_KEYWORD_ENTRY *ke;
127 ke = cgen_keyword_lookup_value (keyword_table, value);
129 (*info->fprintf_func) (info->stream, "%s", ke->name);
131 (*info->fprintf_func) (info->stream, "???");
134 /* Default insn printer.
136 DIS_INFO is defined as `void *' so the disassembler needn't know anything
137 about disassemble_info. */
140 print_insn_normal (CGEN_CPU_DESC cd,
142 const CGEN_INSN *insn,
147 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
148 disassemble_info *info = (disassemble_info *) dis_info;
149 const CGEN_SYNTAX_CHAR_TYPE *syn;
151 CGEN_INIT_PRINT (cd);
153 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
155 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
157 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
160 if (CGEN_SYNTAX_CHAR_P (*syn))
162 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
166 /* We have an operand. */
167 @arch@_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
168 fields, CGEN_INSN_ATTRS (insn), pc, length);
172 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
174 Returns 0 if all is well, non-zero otherwise. */
177 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
179 disassemble_info *info,
182 CGEN_EXTRACT_INFO *ex_info,
183 unsigned long *insn_value)
185 int status = (*info->read_memory_func) (pc, buf, buflen, info);
189 (*info->memory_error_func) (status, pc, info);
193 ex_info->dis_info = info;
194 ex_info->valid = (1 << buflen) - 1;
195 ex_info->insn_bytes = buf;
197 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
201 /* Utility to print an insn.
202 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
203 The result is the size of the insn in bytes or zero for an unknown insn
204 or -1 if an error occurs fetching data (memory_error_func will have
208 print_insn (CGEN_CPU_DESC cd,
210 disassemble_info *info,
214 CGEN_INSN_INT insn_value;
215 const CGEN_INSN_LIST *insn_list;
216 CGEN_EXTRACT_INFO ex_info;
219 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
220 basesize = cd->base_insn_bitsize < buflen * 8 ?
221 cd->base_insn_bitsize : buflen * 8;
222 insn_value = cgen_get_insn_value (cd, buf, basesize);
225 /* Fill in ex_info fields like read_insn would. Don't actually call
226 read_insn, since the incoming buffer is already read (and possibly
227 modified a la m32r). */
228 ex_info.valid = (1 << buflen) - 1;
229 ex_info.dis_info = info;
230 ex_info.insn_bytes = buf;
232 /* The instructions are stored in hash lists.
233 Pick the first one and keep trying until we find the right one. */
235 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
236 while (insn_list != NULL)
238 const CGEN_INSN *insn = insn_list->insn;
241 unsigned long insn_value_cropped;
243 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
244 /* Not needed as insn shouldn't be in hash lists if not supported. */
245 /* Supported by this cpu? */
246 if (! @arch@_cgen_insn_supported (cd, insn))
248 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
253 /* Basic bit mask must be correct. */
254 /* ??? May wish to allow target to defer this check until the extract
257 /* Base size may exceed this instruction's size. Extract the
258 relevant part from the buffer. */
259 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
260 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
261 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
262 info->endian == BFD_ENDIAN_BIG);
264 insn_value_cropped = insn_value;
266 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
267 == CGEN_INSN_BASE_VALUE (insn))
269 /* Printing is handled in two passes. The first pass parses the
270 machine insn and extracts the fields. The second pass prints
273 /* Make sure the entire insn is loaded into insn_value, if it
275 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
276 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
278 unsigned long full_insn_value;
279 int rc = read_insn (cd, pc, info, buf,
280 CGEN_INSN_BITSIZE (insn) / 8,
281 & ex_info, & full_insn_value);
284 length = CGEN_EXTRACT_FN (cd, insn)
285 (cd, insn, &ex_info, full_insn_value, &fields, pc);
288 length = CGEN_EXTRACT_FN (cd, insn)
289 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
291 /* Length < 0 -> error. */
296 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
297 /* Length is in bits, result is in bytes. */
302 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
308 /* Default value for CGEN_PRINT_INSN.
309 The result is the size of the insn in bytes or zero for an unknown insn
310 or -1 if an error occured fetching bytes. */
312 #ifndef CGEN_PRINT_INSN
313 #define CGEN_PRINT_INSN default_print_insn
317 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
319 bfd_byte buf[CGEN_MAX_INSN_SIZE];
323 /* Attempt to read the base part of the insn. */
324 buflen = cd->base_insn_bitsize / 8;
325 status = (*info->read_memory_func) (pc, buf, buflen, info);
327 /* Try again with the minimum part, if min < base. */
328 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
330 buflen = cd->min_insn_bitsize / 8;
331 status = (*info->read_memory_func) (pc, buf, buflen, info);
336 (*info->memory_error_func) (status, pc, info);
340 return print_insn (cd, pc, info, buf, buflen);
344 Print one instruction from PC on INFO->STREAM.
345 Return the size of the instruction (in bytes). */
347 typedef struct cpu_desc_list
349 struct cpu_desc_list *next;
357 print_insn_@arch@ (bfd_vma pc, disassemble_info *info)
359 static cpu_desc_list *cd_list = 0;
360 cpu_desc_list *cl = 0;
361 static CGEN_CPU_DESC cd = 0;
363 static int prev_mach;
364 static int prev_endian;
367 int endian = (info->endian == BFD_ENDIAN_BIG
369 : CGEN_ENDIAN_LITTLE);
370 enum bfd_architecture arch;
372 /* ??? gdb will set mach but leave the architecture as "unknown" */
373 #ifndef CGEN_BFD_ARCH
374 #define CGEN_BFD_ARCH bfd_arch_@arch@
377 if (arch == bfd_arch_unknown)
378 arch = CGEN_BFD_ARCH;
380 /* There's no standard way to compute the machine or isa number
381 so we leave it to the target. */
382 #ifdef CGEN_COMPUTE_MACH
383 mach = CGEN_COMPUTE_MACH (info);
388 #ifdef CGEN_COMPUTE_ISA
389 isa = CGEN_COMPUTE_ISA (info);
391 isa = info->insn_sets;
394 /* If we've switched cpu's, try to find a handle we've used before */
398 || endian != prev_endian))
401 for (cl = cd_list; cl; cl = cl->next)
403 if (cl->isa == isa &&
405 cl->endian == endian)
413 /* If we haven't initialized yet, initialize the opcode table. */
416 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
417 const char *mach_name;
421 mach_name = arch_type->printable_name;
425 prev_endian = endian;
426 cd = @arch@_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
427 CGEN_CPU_OPEN_BFDMACH, mach_name,
428 CGEN_CPU_OPEN_ENDIAN, prev_endian,
433 /* Save this away for future reference. */
434 cl = xmalloc (sizeof (struct cpu_desc_list));
442 @arch@_cgen_init_dis (cd);
445 /* We try to have as much common code as possible.
446 But at this point some targets need to take over. */
447 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
448 but if not possible try to move this hook elsewhere rather than
450 length = CGEN_PRINT_INSN (cd, pc, info);
456 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
457 return cd->default_insn_bitsize / 8;