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);
188 (*info->memory_error_func) (status, pc, info);
192 ex_info->dis_info = info;
193 ex_info->valid = (1 << buflen) - 1;
194 ex_info->insn_bytes = buf;
196 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
200 /* Utility to print an insn.
201 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
202 The result is the size of the insn in bytes or zero for an unknown insn
203 or -1 if an error occurs fetching data (memory_error_func will have
207 print_insn (CGEN_CPU_DESC cd,
209 disassemble_info *info,
213 CGEN_INSN_INT insn_value;
214 const CGEN_INSN_LIST *insn_list;
215 CGEN_EXTRACT_INFO ex_info;
218 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
219 basesize = cd->base_insn_bitsize < buflen * 8 ?
220 cd->base_insn_bitsize : buflen * 8;
221 insn_value = cgen_get_insn_value (cd, buf, basesize);
224 /* Fill in ex_info fields like read_insn would. Don't actually call
225 read_insn, since the incoming buffer is already read (and possibly
226 modified a la m32r). */
227 ex_info.valid = (1 << buflen) - 1;
228 ex_info.dis_info = info;
229 ex_info.insn_bytes = buf;
231 /* The instructions are stored in hash lists.
232 Pick the first one and keep trying until we find the right one. */
234 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
235 while (insn_list != NULL)
237 const CGEN_INSN *insn = insn_list->insn;
240 unsigned long insn_value_cropped;
242 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
243 /* Not needed as insn shouldn't be in hash lists if not supported. */
244 /* Supported by this cpu? */
245 if (! @arch@_cgen_insn_supported (cd, insn))
247 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
252 /* Basic bit mask must be correct. */
253 /* ??? May wish to allow target to defer this check until the extract
256 /* Base size may exceed this instruction's size. Extract the
257 relevant part from the buffer. */
258 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
259 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
260 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
261 info->endian == BFD_ENDIAN_BIG);
263 insn_value_cropped = insn_value;
265 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
266 == CGEN_INSN_BASE_VALUE (insn))
268 /* Printing is handled in two passes. The first pass parses the
269 machine insn and extracts the fields. The second pass prints
272 /* Make sure the entire insn is loaded into insn_value, if it
274 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
275 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
277 unsigned long full_insn_value;
278 int rc = read_insn (cd, pc, info, buf,
279 CGEN_INSN_BITSIZE (insn) / 8,
280 & ex_info, & full_insn_value);
283 length = CGEN_EXTRACT_FN (cd, insn)
284 (cd, insn, &ex_info, full_insn_value, &fields, pc);
287 length = CGEN_EXTRACT_FN (cd, insn)
288 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
290 /* length < 0 -> error */
295 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
296 /* length is in bits, result is in bytes */
301 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
307 /* Default value for CGEN_PRINT_INSN.
308 The result is the size of the insn in bytes or zero for an unknown insn
309 or -1 if an error occured fetching bytes. */
311 #ifndef CGEN_PRINT_INSN
312 #define CGEN_PRINT_INSN default_print_insn
316 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
318 bfd_byte buf[CGEN_MAX_INSN_SIZE];
322 /* Attempt to read the base part of the insn. */
323 buflen = cd->base_insn_bitsize / 8;
324 status = (*info->read_memory_func) (pc, buf, buflen, info);
326 /* Try again with the minimum part, if min < base. */
327 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
329 buflen = cd->min_insn_bitsize / 8;
330 status = (*info->read_memory_func) (pc, buf, buflen, info);
335 (*info->memory_error_func) (status, pc, info);
339 return print_insn (cd, pc, info, buf, buflen);
343 Print one instruction from PC on INFO->STREAM.
344 Return the size of the instruction (in bytes). */
346 typedef struct cpu_desc_list {
347 struct cpu_desc_list *next;
355 print_insn_@arch@ (bfd_vma pc, disassemble_info *info)
357 static cpu_desc_list *cd_list = 0;
358 cpu_desc_list *cl = 0;
359 static CGEN_CPU_DESC cd = 0;
361 static int prev_mach;
362 static int prev_endian;
365 int endian = (info->endian == BFD_ENDIAN_BIG
367 : CGEN_ENDIAN_LITTLE);
368 enum bfd_architecture arch;
370 /* ??? gdb will set mach but leave the architecture as "unknown" */
371 #ifndef CGEN_BFD_ARCH
372 #define CGEN_BFD_ARCH bfd_arch_@arch@
375 if (arch == bfd_arch_unknown)
376 arch = CGEN_BFD_ARCH;
378 /* There's no standard way to compute the machine or isa number
379 so we leave it to the target. */
380 #ifdef CGEN_COMPUTE_MACH
381 mach = CGEN_COMPUTE_MACH (info);
386 #ifdef CGEN_COMPUTE_ISA
387 isa = CGEN_COMPUTE_ISA (info);
389 isa = info->insn_sets;
392 /* If we've switched cpu's, try to find a handle we've used before */
396 || endian != prev_endian))
399 for (cl = cd_list; cl; cl = cl->next)
401 if (cl->isa == isa &&
403 cl->endian == endian)
411 /* If we haven't initialized yet, initialize the opcode table. */
414 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
415 const char *mach_name;
419 mach_name = arch_type->printable_name;
423 prev_endian = endian;
424 cd = @arch@_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
425 CGEN_CPU_OPEN_BFDMACH, mach_name,
426 CGEN_CPU_OPEN_ENDIAN, prev_endian,
431 /* save this away for future reference */
432 cl = xmalloc (sizeof (struct cpu_desc_list));
440 @arch@_cgen_init_dis (cd);
443 /* We try to have as much common code as possible.
444 But at this point some targets need to take over. */
445 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
446 but if not possible try to move this hook elsewhere rather than
448 length = CGEN_PRINT_INSN (cd, pc, info);
454 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
455 return cd->default_insn_bitsize / 8;