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, 2003, 2005, 2007,
8 2008, 2010 Free Software Foundation, Inc.
10 This file is part of libopcodes.
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)
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.
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 /* Print the operand as directed by the attributes. */
74 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
76 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
77 (*info->fprintf_func) (info->stream, "%ld", value);
79 (*info->fprintf_func) (info->stream, "0x%lx", value);
82 /* Default address handler. */
85 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
89 bfd_vma pc ATTRIBUTE_UNUSED,
90 int length ATTRIBUTE_UNUSED)
92 disassemble_info *info = (disassemble_info *) dis_info;
94 /* Print the operand as directed by the attributes. */
95 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
96 ; /* Nothing to do. */
97 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
98 (*info->print_address_func) (value, info);
99 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
100 (*info->print_address_func) (value, info);
101 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
102 (*info->fprintf_func) (info->stream, "%ld", (long) value);
104 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
107 /* Keyword print handler. */
110 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
112 CGEN_KEYWORD *keyword_table,
114 unsigned int attrs ATTRIBUTE_UNUSED)
116 disassemble_info *info = (disassemble_info *) dis_info;
117 const CGEN_KEYWORD_ENTRY *ke;
119 ke = cgen_keyword_lookup_value (keyword_table, value);
121 (*info->fprintf_func) (info->stream, "%s", ke->name);
123 (*info->fprintf_func) (info->stream, "???");
126 /* Default insn printer.
128 DIS_INFO is defined as `void *' so the disassembler needn't know anything
129 about disassemble_info. */
132 print_insn_normal (CGEN_CPU_DESC cd,
134 const CGEN_INSN *insn,
139 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
140 disassemble_info *info = (disassemble_info *) dis_info;
141 const CGEN_SYNTAX_CHAR_TYPE *syn;
143 CGEN_INIT_PRINT (cd);
145 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
147 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
149 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
152 if (CGEN_SYNTAX_CHAR_P (*syn))
154 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
158 /* We have an operand. */
159 @arch@_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
160 fields, CGEN_INSN_ATTRS (insn), pc, length);
164 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
166 Returns 0 if all is well, non-zero otherwise. */
169 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
171 disassemble_info *info,
174 CGEN_EXTRACT_INFO *ex_info,
175 unsigned long *insn_value)
177 int status = (*info->read_memory_func) (pc, buf, buflen, info);
181 (*info->memory_error_func) (status, pc, info);
185 ex_info->dis_info = info;
186 ex_info->valid = (1 << buflen) - 1;
187 ex_info->insn_bytes = buf;
189 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
193 /* Utility to print an insn.
194 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
195 The result is the size of the insn in bytes or zero for an unknown insn
196 or -1 if an error occurs fetching data (memory_error_func will have
200 print_insn (CGEN_CPU_DESC cd,
202 disassemble_info *info,
206 CGEN_INSN_INT insn_value;
207 const CGEN_INSN_LIST *insn_list;
208 CGEN_EXTRACT_INFO ex_info;
211 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
212 basesize = cd->base_insn_bitsize < buflen * 8 ?
213 cd->base_insn_bitsize : buflen * 8;
214 insn_value = cgen_get_insn_value (cd, buf, basesize);
217 /* Fill in ex_info fields like read_insn would. Don't actually call
218 read_insn, since the incoming buffer is already read (and possibly
219 modified a la m32r). */
220 ex_info.valid = (1 << buflen) - 1;
221 ex_info.dis_info = info;
222 ex_info.insn_bytes = buf;
224 /* The instructions are stored in hash lists.
225 Pick the first one and keep trying until we find the right one. */
227 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
228 while (insn_list != NULL)
230 const CGEN_INSN *insn = insn_list->insn;
233 unsigned long insn_value_cropped;
235 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
236 /* Not needed as insn shouldn't be in hash lists if not supported. */
237 /* Supported by this cpu? */
238 if (! @arch@_cgen_insn_supported (cd, insn))
240 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
245 /* Basic bit mask must be correct. */
246 /* ??? May wish to allow target to defer this check until the extract
249 /* Base size may exceed this instruction's size. Extract the
250 relevant part from the buffer. */
251 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
252 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
253 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
254 info->endian == BFD_ENDIAN_BIG);
256 insn_value_cropped = insn_value;
258 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
259 == CGEN_INSN_BASE_VALUE (insn))
261 /* Printing is handled in two passes. The first pass parses the
262 machine insn and extracts the fields. The second pass prints
265 /* Make sure the entire insn is loaded into insn_value, if it
267 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
268 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
270 unsigned long full_insn_value;
271 int rc = read_insn (cd, pc, info, buf,
272 CGEN_INSN_BITSIZE (insn) / 8,
273 & ex_info, & full_insn_value);
276 length = CGEN_EXTRACT_FN (cd, insn)
277 (cd, insn, &ex_info, full_insn_value, &fields, pc);
280 length = CGEN_EXTRACT_FN (cd, insn)
281 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
283 /* Length < 0 -> error. */
288 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
289 /* Length is in bits, result is in bytes. */
294 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
300 /* Default value for CGEN_PRINT_INSN.
301 The result is the size of the insn in bytes or zero for an unknown insn
302 or -1 if an error occured fetching bytes. */
304 #ifndef CGEN_PRINT_INSN
305 #define CGEN_PRINT_INSN default_print_insn
309 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
311 bfd_byte buf[CGEN_MAX_INSN_SIZE];
315 /* Attempt to read the base part of the insn. */
316 buflen = cd->base_insn_bitsize / 8;
317 status = (*info->read_memory_func) (pc, buf, buflen, info);
319 /* Try again with the minimum part, if min < base. */
320 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
322 buflen = cd->min_insn_bitsize / 8;
323 status = (*info->read_memory_func) (pc, buf, buflen, info);
328 (*info->memory_error_func) (status, pc, info);
332 return print_insn (cd, pc, info, buf, buflen);
336 Print one instruction from PC on INFO->STREAM.
337 Return the size of the instruction (in bytes). */
339 typedef struct cpu_desc_list
341 struct cpu_desc_list *next;
349 print_insn_@arch@ (bfd_vma pc, disassemble_info *info)
351 static cpu_desc_list *cd_list = 0;
352 cpu_desc_list *cl = 0;
353 static CGEN_CPU_DESC cd = 0;
354 static CGEN_BITSET *prev_isa;
355 static int prev_mach;
356 static int prev_endian;
360 int endian = (info->endian == BFD_ENDIAN_BIG
362 : CGEN_ENDIAN_LITTLE);
363 enum bfd_architecture arch;
365 /* ??? gdb will set mach but leave the architecture as "unknown" */
366 #ifndef CGEN_BFD_ARCH
367 #define CGEN_BFD_ARCH bfd_arch_@arch@
370 if (arch == bfd_arch_unknown)
371 arch = CGEN_BFD_ARCH;
373 /* There's no standard way to compute the machine or isa number
374 so we leave it to the target. */
375 #ifdef CGEN_COMPUTE_MACH
376 mach = CGEN_COMPUTE_MACH (info);
381 #ifdef CGEN_COMPUTE_ISA
383 static CGEN_BITSET *permanent_isa;
386 permanent_isa = cgen_bitset_create (MAX_ISAS);
388 cgen_bitset_clear (isa);
389 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
392 isa = info->insn_sets;
395 /* If we've switched cpu's, try to find a handle we've used before */
397 && (cgen_bitset_compare (isa, prev_isa) != 0
399 || endian != prev_endian))
402 for (cl = cd_list; cl; cl = cl->next)
404 if (cgen_bitset_compare (cl->isa, isa) == 0 &&
406 cl->endian == endian)
415 /* If we haven't initialized yet, initialize the opcode table. */
418 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
419 const char *mach_name;
423 mach_name = arch_type->printable_name;
425 prev_isa = cgen_bitset_copy (isa);
427 prev_endian = endian;
428 cd = @arch@_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
429 CGEN_CPU_OPEN_BFDMACH, mach_name,
430 CGEN_CPU_OPEN_ENDIAN, prev_endian,
435 /* Save this away for future reference. */
436 cl = xmalloc (sizeof (struct cpu_desc_list));
444 @arch@_cgen_init_dis (cd);
447 /* We try to have as much common code as possible.
448 But at this point some targets need to take over. */
449 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
450 but if not possible try to move this hook elsewhere rather than
452 length = CGEN_PRINT_INSN (cd, pc, info);
458 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
459 return cd->default_insn_bitsize / 8;