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 (C) 1996-2024 Free Software Foundation, Inc.
9 This file is part of libopcodes.
11 This library 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 3, or (at your option)
16 It is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 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 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
31 #include "disassemble.h"
34 #include "libiberty.h"
35 #include "@prefix@-desc.h"
36 #include "@prefix@-opc.h"
39 /* Default text to print if an instruction isn't recognized. */
40 #define UNKNOWN_INSN_MSG _("*unknown*")
42 static void print_normal
43 (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int);
44 static void print_address
45 (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED;
46 static void print_keyword
47 (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED;
48 static void print_insn_normal
49 (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int);
51 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, unsigned);
52 static int default_print_insn
53 (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED;
55 (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *,
58 /* -- disassembler routines inserted here. */
60 /* Default print handler. */
63 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
67 bfd_vma pc ATTRIBUTE_UNUSED,
68 int length ATTRIBUTE_UNUSED)
70 disassemble_info *info = (disassemble_info *) dis_info;
72 /* Print the operand as directed by the attributes. */
73 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
75 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
76 (*info->fprintf_func) (info->stream, "%ld", value);
78 (*info->fprintf_func) (info->stream, "0x%lx", value);
81 /* Default address handler. */
84 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
88 bfd_vma pc ATTRIBUTE_UNUSED,
89 int length ATTRIBUTE_UNUSED)
91 disassemble_info *info = (disassemble_info *) dis_info;
93 /* Print the operand as directed by the attributes. */
94 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
95 ; /* Nothing to do. */
96 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
97 (*info->print_address_func) (value, info);
98 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
99 (*info->print_address_func) (value, info);
100 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
101 (*info->fprintf_func) (info->stream, "%ld", (long) value);
103 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
106 /* Keyword print handler. */
109 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
111 CGEN_KEYWORD *keyword_table,
113 unsigned int attrs ATTRIBUTE_UNUSED)
115 disassemble_info *info = (disassemble_info *) dis_info;
116 const CGEN_KEYWORD_ENTRY *ke;
118 ke = cgen_keyword_lookup_value (keyword_table, value);
120 (*info->fprintf_func) (info->stream, "%s", ke->name);
122 (*info->fprintf_func) (info->stream, "???");
125 /* Default insn printer.
127 DIS_INFO is defined as `void *' so the disassembler needn't know anything
128 about disassemble_info. */
131 print_insn_normal (CGEN_CPU_DESC cd,
133 const CGEN_INSN *insn,
138 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
139 disassemble_info *info = (disassemble_info *) dis_info;
140 const CGEN_SYNTAX_CHAR_TYPE *syn;
142 CGEN_INIT_PRINT (cd);
144 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
146 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
148 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
151 if (CGEN_SYNTAX_CHAR_P (*syn))
153 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
157 /* We have an operand. */
158 @arch@_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
159 fields, CGEN_INSN_ATTRS (insn), pc, length);
163 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
165 Returns 0 if all is well, non-zero otherwise. */
168 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
170 disassemble_info *info,
173 CGEN_EXTRACT_INFO *ex_info,
174 unsigned long *insn_value)
176 int status = (*info->read_memory_func) (pc, buf, buflen, info);
180 (*info->memory_error_func) (status, pc, info);
184 ex_info->dis_info = info;
185 ex_info->valid = (1 << buflen) - 1;
186 ex_info->insn_bytes = buf;
188 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
192 /* Utility to print an insn.
193 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
194 The result is the size of the insn in bytes or zero for an unknown insn
195 or -1 if an error occurs fetching data (memory_error_func will have
199 print_insn (CGEN_CPU_DESC cd,
201 disassemble_info *info,
205 CGEN_INSN_INT insn_value;
206 const CGEN_INSN_LIST *insn_list;
207 CGEN_EXTRACT_INFO ex_info;
210 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
211 basesize = cd->base_insn_bitsize < buflen * 8 ?
212 cd->base_insn_bitsize : buflen * 8;
213 insn_value = cgen_get_insn_value (cd, buf, basesize, cd->insn_endian);
216 /* Fill in ex_info fields like read_insn would. Don't actually call
217 read_insn, since the incoming buffer is already read (and possibly
218 modified a la m32r). */
219 ex_info.valid = (1 << buflen) - 1;
220 ex_info.dis_info = info;
221 ex_info.insn_bytes = buf;
223 /* The instructions are stored in hash lists.
224 Pick the first one and keep trying until we find the right one. */
226 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
227 while (insn_list != NULL)
229 const CGEN_INSN *insn = insn_list->insn;
232 unsigned long insn_value_cropped;
234 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
235 /* Not needed as insn shouldn't be in hash lists if not supported. */
236 /* Supported by this cpu? */
237 if (! @arch@_cgen_insn_supported (cd, insn))
239 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
244 /* Basic bit mask must be correct. */
245 /* ??? May wish to allow target to defer this check until the extract
248 /* Base size may exceed this instruction's size. Extract the
249 relevant part from the buffer. */
250 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
251 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
252 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
253 info->endian == BFD_ENDIAN_BIG);
255 insn_value_cropped = insn_value;
257 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
258 == CGEN_INSN_BASE_VALUE (insn))
260 /* Printing is handled in two passes. The first pass parses the
261 machine insn and extracts the fields. The second pass prints
264 /* Make sure the entire insn is loaded into insn_value, if it
266 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
267 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
269 unsigned long full_insn_value;
270 int rc = read_insn (cd, pc, info, buf,
271 CGEN_INSN_BITSIZE (insn) / 8,
272 & ex_info, & full_insn_value);
275 length = CGEN_EXTRACT_FN (cd, insn)
276 (cd, insn, &ex_info, full_insn_value, &fields, pc);
279 length = CGEN_EXTRACT_FN (cd, insn)
280 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
282 /* Length < 0 -> error. */
287 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
288 /* Length is in bits, result is in bytes. */
293 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
299 /* Default value for CGEN_PRINT_INSN.
300 The result is the size of the insn in bytes or zero for an unknown insn
301 or -1 if an error occured fetching bytes. */
303 #ifndef CGEN_PRINT_INSN
304 #define CGEN_PRINT_INSN default_print_insn
308 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
310 bfd_byte buf[CGEN_MAX_INSN_SIZE];
314 /* Attempt to read the base part of the insn. */
315 buflen = cd->base_insn_bitsize / 8;
316 status = (*info->read_memory_func) (pc, buf, buflen, info);
318 /* Try again with the minimum part, if min < base. */
319 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
321 buflen = cd->min_insn_bitsize / 8;
322 status = (*info->read_memory_func) (pc, buf, buflen, info);
327 (*info->memory_error_func) (status, pc, info);
331 return print_insn (cd, pc, info, buf, buflen);
335 Print one instruction from PC on INFO->STREAM.
336 Return the size of the instruction (in bytes). */
338 typedef struct cpu_desc_list
340 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;
357 static int prev_insn_endian;
361 int endian = (info->endian == BFD_ENDIAN_BIG
363 : CGEN_ENDIAN_LITTLE);
364 int insn_endian = (info->endian_code == BFD_ENDIAN_BIG
366 : CGEN_ENDIAN_LITTLE);
367 enum bfd_architecture arch;
369 /* ??? gdb will set mach but leave the architecture as "unknown" */
370 #ifndef CGEN_BFD_ARCH
371 #define CGEN_BFD_ARCH bfd_arch_@arch@
374 if (arch == bfd_arch_unknown)
375 arch = CGEN_BFD_ARCH;
377 /* There's no standard way to compute the machine or isa number
378 so we leave it to the target. */
379 #ifdef CGEN_COMPUTE_MACH
380 mach = CGEN_COMPUTE_MACH (info);
385 #ifdef CGEN_COMPUTE_ISA
387 static CGEN_BITSET *permanent_isa;
390 permanent_isa = cgen_bitset_create (MAX_ISAS);
392 cgen_bitset_clear (isa);
393 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
396 isa = info->private_data;
399 /* If we've switched cpu's, try to find a handle we've used before */
401 && (cgen_bitset_compare (isa, prev_isa) != 0
403 || endian != prev_endian))
406 for (cl = cd_list; cl; cl = cl->next)
408 if (cgen_bitset_compare (cl->isa, isa) == 0 &&
410 cl->endian == endian)
419 /* If we haven't initialized yet, initialize the opcode table. */
422 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
423 const char *mach_name;
427 mach_name = arch_type->printable_name;
429 prev_isa = cgen_bitset_copy (isa);
431 prev_endian = endian;
432 prev_insn_endian = insn_endian;
433 cd = @arch@_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
434 CGEN_CPU_OPEN_BFDMACH, mach_name,
435 CGEN_CPU_OPEN_ENDIAN, prev_endian,
436 CGEN_CPU_OPEN_INSN_ENDIAN, prev_insn_endian,
441 /* Save this away for future reference. */
442 cl = xmalloc (sizeof (struct cpu_desc_list));
450 @arch@_cgen_init_dis (cd);
453 /* We try to have as much common code as possible.
454 But at this point some targets need to take over. */
455 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
456 but if not possible try to move this hook elsewhere rather than
458 length = CGEN_PRINT_INSN (cd, pc, info);
464 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
465 return cd->default_insn_bitsize / 8;