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 Free Software Foundation, Inc.
9 This file is part of the GNU Binutils and GDB, the GNU debugger.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2, or (at your option)
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software Foundation, Inc.,
23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
34 #include "@prefix@-desc.h"
35 #include "@prefix@-opc.h"
38 /* Default text to print if an instruction isn't recognized. */
39 #define UNKNOWN_INSN_MSG _("*unknown*")
41 static void print_normal
42 PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned int, bfd_vma, int));
43 static void print_address
44 PARAMS ((CGEN_CPU_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int));
45 static void print_keyword
46 PARAMS ((CGEN_CPU_DESC, PTR, CGEN_KEYWORD *, long, unsigned int));
47 static void print_insn_normal
48 PARAMS ((CGEN_CPU_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *,
50 static int print_insn PARAMS ((CGEN_CPU_DESC, bfd_vma,
51 disassemble_info *, char *, int));
52 static int default_print_insn
53 PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *));
55 /* -- disassembler routines inserted here */
57 /* Default print handler. */
60 print_normal (cd, dis_info, value, attrs, pc, length)
61 #ifdef CGEN_PRINT_NORMAL
64 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
69 #ifdef CGEN_PRINT_NORMAL
73 bfd_vma pc ATTRIBUTE_UNUSED;
74 int length ATTRIBUTE_UNUSED;
77 disassemble_info *info = (disassemble_info *) dis_info;
79 #ifdef CGEN_PRINT_NORMAL
80 CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
83 /* Print the operand as directed by the attributes. */
84 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
86 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
87 (*info->fprintf_func) (info->stream, "%ld", value);
89 (*info->fprintf_func) (info->stream, "0x%lx", value);
92 /* Default address handler. */
95 print_address (cd, dis_info, value, attrs, pc, length)
96 #ifdef CGEN_PRINT_NORMAL
99 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
104 #ifdef CGEN_PRINT_NORMAL
108 bfd_vma pc ATTRIBUTE_UNUSED;
109 int length ATTRIBUTE_UNUSED;
112 disassemble_info *info = (disassemble_info *) dis_info;
114 #ifdef CGEN_PRINT_ADDRESS
115 CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
118 /* Print the operand as directed by the attributes. */
119 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
120 ; /* nothing to do */
121 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
122 (*info->print_address_func) (value, info);
123 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
124 (*info->print_address_func) (value, info);
125 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
126 (*info->fprintf_func) (info->stream, "%ld", (long) value);
128 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
131 /* Keyword print handler. */
134 print_keyword (cd, dis_info, keyword_table, value, attrs)
135 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
137 CGEN_KEYWORD *keyword_table;
139 unsigned int attrs ATTRIBUTE_UNUSED;
141 disassemble_info *info = (disassemble_info *) dis_info;
142 const CGEN_KEYWORD_ENTRY *ke;
144 ke = cgen_keyword_lookup_value (keyword_table, value);
146 (*info->fprintf_func) (info->stream, "%s", ke->name);
148 (*info->fprintf_func) (info->stream, "???");
151 /* Default insn printer.
153 DIS_INFO is defined as `PTR' so the disassembler needn't know anything
154 about disassemble_info. */
157 print_insn_normal (cd, dis_info, insn, fields, pc, length)
160 const CGEN_INSN *insn;
165 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
166 disassemble_info *info = (disassemble_info *) dis_info;
167 const CGEN_SYNTAX_CHAR_TYPE *syn;
169 CGEN_INIT_PRINT (cd);
171 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
173 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
175 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
178 if (CGEN_SYNTAX_CHAR_P (*syn))
180 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
184 /* We have an operand. */
185 @arch@_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
186 fields, CGEN_INSN_ATTRS (insn), pc, length);
190 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
192 Returns 0 if all is well, non-zero otherwise. */
194 read_insn (cd, pc, info, buf, buflen, ex_info, insn_value)
197 disassemble_info *info;
200 CGEN_EXTRACT_INFO *ex_info;
201 unsigned long *insn_value;
203 int status = (*info->read_memory_func) (pc, buf, buflen, info);
206 (*info->memory_error_func) (status, pc, info);
210 ex_info->dis_info = info;
211 ex_info->valid = (1 << buflen) - 1;
212 ex_info->insn_bytes = buf;
214 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
218 /* Utility to print an insn.
219 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
220 The result is the size of the insn in bytes or zero for an unknown insn
221 or -1 if an error occurs fetching data (memory_error_func will have
225 print_insn (cd, pc, info, buf, buflen)
228 disassemble_info *info;
232 unsigned long insn_value;
233 const CGEN_INSN_LIST *insn_list;
234 CGEN_EXTRACT_INFO ex_info;
236 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
237 insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
239 /* Fill in ex_info fields like read_insn would. Don't actually call
240 read_insn, since the incoming buffer is already read (and possibly
241 modified a la m32r). */
242 ex_info.valid = (1 << buflen) - 1;
243 ex_info.dis_info = info;
244 ex_info.insn_bytes = buf;
246 /* The instructions are stored in hash lists.
247 Pick the first one and keep trying until we find the right one. */
249 insn_list = CGEN_DIS_LOOKUP_INSN (cd, buf, insn_value);
250 while (insn_list != NULL)
252 const CGEN_INSN *insn = insn_list->insn;
255 unsigned long insn_value_cropped;
257 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
258 /* not needed as insn shouldn't be in hash lists if not supported */
259 /* Supported by this cpu? */
260 if (! @arch@_cgen_insn_supported (cd, insn))
262 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
267 /* Basic bit mask must be correct. */
268 /* ??? May wish to allow target to defer this check until the extract
271 /* Base size may exceed this instruction's size. Extract the
272 relevant part from the buffer. */
273 if ((CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
274 (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
275 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
276 info->endian == BFD_ENDIAN_BIG);
278 insn_value_cropped = insn_value;
280 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
281 == CGEN_INSN_BASE_VALUE (insn))
283 /* Printing is handled in two passes. The first pass parses the
284 machine insn and extracts the fields. The second pass prints
287 /* Make sure the entire insn is loaded into insn_value, if it
289 if (CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize &&
290 (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
292 unsigned long full_insn_value;
293 int rc = read_insn (cd, pc, info, buf,
294 CGEN_INSN_BITSIZE (insn) / 8,
295 & ex_info, & full_insn_value);
298 length = CGEN_EXTRACT_FN (cd, insn)
299 (cd, insn, &ex_info, full_insn_value, &fields, pc);
302 length = CGEN_EXTRACT_FN (cd, insn)
303 (cd, insn, &ex_info, insn_value, &fields, pc);
305 /* length < 0 -> error */
310 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
311 /* length is in bits, result is in bytes */
316 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
322 /* Default value for CGEN_PRINT_INSN.
323 The result is the size of the insn in bytes or zero for an unknown insn
324 or -1 if an error occured fetching bytes. */
326 #ifndef CGEN_PRINT_INSN
327 #define CGEN_PRINT_INSN default_print_insn
331 default_print_insn (cd, pc, info)
334 disassemble_info *info;
336 char buf[CGEN_MAX_INSN_SIZE];
340 /* Attempt to read the base part of the insn. */
341 buflen = cd->base_insn_bitsize / 8;
342 status = (*info->read_memory_func) (pc, buf, buflen, info);
344 /* Try again with the minimum part, if min < base. */
345 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
347 buflen = cd->min_insn_bitsize / 8;
348 status = (*info->read_memory_func) (pc, buf, buflen, info);
353 (*info->memory_error_func) (status, pc, info);
357 return print_insn (cd, pc, info, buf, buflen);
361 Print one instruction from PC on INFO->STREAM.
362 Return the size of the instruction (in bytes). */
365 print_insn_@arch@ (pc, info)
367 disassemble_info *info;
369 static CGEN_CPU_DESC cd = 0;
371 static int prev_mach;
372 static int prev_endian;
375 int endian = (info->endian == BFD_ENDIAN_BIG
377 : CGEN_ENDIAN_LITTLE);
378 enum bfd_architecture arch;
380 /* ??? gdb will set mach but leave the architecture as "unknown" */
381 #ifndef CGEN_BFD_ARCH
382 #define CGEN_BFD_ARCH bfd_arch_@arch@
385 if (arch == bfd_arch_unknown)
386 arch = CGEN_BFD_ARCH;
388 /* There's no standard way to compute the machine or isa number
389 so we leave it to the target. */
390 #ifdef CGEN_COMPUTE_MACH
391 mach = CGEN_COMPUTE_MACH (info);
396 #ifdef CGEN_COMPUTE_ISA
397 isa = CGEN_COMPUTE_ISA (info);
402 /* If we've switched cpu's, close the current table and open a new one. */
406 || endian != prev_endian))
408 @arch@_cgen_cpu_close (cd);
412 /* If we haven't initialized yet, initialize the opcode table. */
415 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
416 const char *mach_name;
420 mach_name = arch_type->printable_name;
424 prev_endian = endian;
425 cd = @arch@_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
426 CGEN_CPU_OPEN_BFDMACH, mach_name,
427 CGEN_CPU_OPEN_ENDIAN, prev_endian,
431 @arch@_cgen_init_dis (cd);
434 /* We try to have as much common code as possible.
435 But at this point some targets need to take over. */
436 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
437 but if not possible try to move this hook elsewhere rather than
439 length = CGEN_PRINT_INSN (cd, pc, info);
445 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
446 return cd->default_insn_bitsize / 8;