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 "openrisc-desc.h"
35 #include "openrisc-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
*));
54 void openrisc_cgen_print_operand
55 PARAMS ((CGEN_CPU_DESC
, int, PTR
, CGEN_FIELDS
*, void const *, bfd_vma
, int));
57 PARAMS ((CGEN_CPU_DESC
, bfd_vma
, disassemble_info
*, char *, int, CGEN_EXTRACT_INFO
*, unsigned long *));
59 /* -- disassembler routines inserted here */
62 /* Main entry point for printing operands.
63 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
64 of dis-asm.h on cgen.h.
66 This function is basically just a big switch statement. Earlier versions
67 used tables to look up the function to use, but
68 - if the table contains both assembler and disassembler functions then
69 the disassembler contains much of the assembler and vice-versa,
70 - there's a lot of inlining possibilities as things grow,
71 - using a switch statement avoids the function call overhead.
73 This function could be moved into `print_insn_normal', but keeping it
74 separate makes clear the interface between `print_insn_normal' and each of
79 openrisc_cgen_print_operand (cd
, opindex
, xinfo
, fields
, attrs
, pc
, length
)
84 void const *attrs ATTRIBUTE_UNUSED
;
88 disassemble_info
*info
= (disassemble_info
*) xinfo
;
92 case OPENRISC_OPERAND_ABS_26
:
93 print_address (cd
, info
, fields
->f_abs26
, 0|(1<<CGEN_OPERAND_ABS_ADDR
), pc
, length
);
95 case OPENRISC_OPERAND_DISP_26
:
96 print_address (cd
, info
, fields
->f_disp26
, 0|(1<<CGEN_OPERAND_PCREL_ADDR
), pc
, length
);
98 case OPENRISC_OPERAND_HI16
:
99 print_normal (cd
, info
, fields
->f_simm16
, 0|(1<<CGEN_OPERAND_SIGNED
)|(1<<CGEN_OPERAND_SIGN_OPT
), pc
, length
);
101 case OPENRISC_OPERAND_LO16
:
102 print_normal (cd
, info
, fields
->f_lo16
, 0|(1<<CGEN_OPERAND_SIGNED
)|(1<<CGEN_OPERAND_SIGN_OPT
), pc
, length
);
104 case OPENRISC_OPERAND_OP_F_23
:
105 print_normal (cd
, info
, fields
->f_op4
, 0, pc
, length
);
107 case OPENRISC_OPERAND_OP_F_3
:
108 print_normal (cd
, info
, fields
->f_op5
, 0, pc
, length
);
110 case OPENRISC_OPERAND_RA
:
111 print_keyword (cd
, info
, & openrisc_cgen_opval_h_gr
, fields
->f_r2
, 0);
113 case OPENRISC_OPERAND_RB
:
114 print_keyword (cd
, info
, & openrisc_cgen_opval_h_gr
, fields
->f_r3
, 0);
116 case OPENRISC_OPERAND_RD
:
117 print_keyword (cd
, info
, & openrisc_cgen_opval_h_gr
, fields
->f_r1
, 0);
119 case OPENRISC_OPERAND_SIMM_16
:
120 print_normal (cd
, info
, fields
->f_simm16
, 0|(1<<CGEN_OPERAND_SIGNED
), pc
, length
);
122 case OPENRISC_OPERAND_UI16NC
:
123 print_normal (cd
, info
, fields
->f_i16nc
, 0|(1<<CGEN_OPERAND_SIGNED
)|(1<<CGEN_OPERAND_SIGN_OPT
)|(1<<CGEN_OPERAND_VIRTUAL
), pc
, length
);
125 case OPENRISC_OPERAND_UIMM_16
:
126 print_normal (cd
, info
, fields
->f_uimm16
, 0, pc
, length
);
128 case OPENRISC_OPERAND_UIMM_5
:
129 print_normal (cd
, info
, fields
->f_uimm5
, 0, pc
, length
);
133 /* xgettext:c-format */
134 fprintf (stderr
, _("Unrecognized field %d while printing insn.\n"),
140 cgen_print_fn
* const openrisc_cgen_print_handlers
[] =
147 openrisc_cgen_init_dis (cd
)
150 openrisc_cgen_init_opcode_table (cd
);
151 openrisc_cgen_init_ibld_table (cd
);
152 cd
->print_handlers
= & openrisc_cgen_print_handlers
[0];
153 cd
->print_operand
= openrisc_cgen_print_operand
;
157 /* Default print handler. */
160 print_normal (cd
, dis_info
, value
, attrs
, pc
, length
)
161 #ifdef CGEN_PRINT_NORMAL
164 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED
;
169 #ifdef CGEN_PRINT_NORMAL
173 bfd_vma pc ATTRIBUTE_UNUSED
;
174 int length ATTRIBUTE_UNUSED
;
177 disassemble_info
*info
= (disassemble_info
*) dis_info
;
179 #ifdef CGEN_PRINT_NORMAL
180 CGEN_PRINT_NORMAL (cd
, info
, value
, attrs
, pc
, length
);
183 /* Print the operand as directed by the attributes. */
184 if (CGEN_BOOL_ATTR (attrs
, CGEN_OPERAND_SEM_ONLY
))
185 ; /* nothing to do */
186 else if (CGEN_BOOL_ATTR (attrs
, CGEN_OPERAND_SIGNED
))
187 (*info
->fprintf_func
) (info
->stream
, "%ld", value
);
189 (*info
->fprintf_func
) (info
->stream
, "0x%lx", value
);
192 /* Default address handler. */
195 print_address (cd
, dis_info
, value
, attrs
, pc
, length
)
196 #ifdef CGEN_PRINT_NORMAL
199 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED
;
204 #ifdef CGEN_PRINT_NORMAL
208 bfd_vma pc ATTRIBUTE_UNUSED
;
209 int length ATTRIBUTE_UNUSED
;
212 disassemble_info
*info
= (disassemble_info
*) dis_info
;
214 #ifdef CGEN_PRINT_ADDRESS
215 CGEN_PRINT_ADDRESS (cd
, info
, value
, attrs
, pc
, length
);
218 /* Print the operand as directed by the attributes. */
219 if (CGEN_BOOL_ATTR (attrs
, CGEN_OPERAND_SEM_ONLY
))
220 ; /* nothing to do */
221 else if (CGEN_BOOL_ATTR (attrs
, CGEN_OPERAND_PCREL_ADDR
))
222 (*info
->print_address_func
) (value
, info
);
223 else if (CGEN_BOOL_ATTR (attrs
, CGEN_OPERAND_ABS_ADDR
))
224 (*info
->print_address_func
) (value
, info
);
225 else if (CGEN_BOOL_ATTR (attrs
, CGEN_OPERAND_SIGNED
))
226 (*info
->fprintf_func
) (info
->stream
, "%ld", (long) value
);
228 (*info
->fprintf_func
) (info
->stream
, "0x%lx", (long) value
);
231 /* Keyword print handler. */
234 print_keyword (cd
, dis_info
, keyword_table
, value
, attrs
)
235 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED
;
237 CGEN_KEYWORD
*keyword_table
;
239 unsigned int attrs ATTRIBUTE_UNUSED
;
241 disassemble_info
*info
= (disassemble_info
*) dis_info
;
242 const CGEN_KEYWORD_ENTRY
*ke
;
244 ke
= cgen_keyword_lookup_value (keyword_table
, value
);
246 (*info
->fprintf_func
) (info
->stream
, "%s", ke
->name
);
248 (*info
->fprintf_func
) (info
->stream
, "???");
251 /* Default insn printer.
253 DIS_INFO is defined as `PTR' so the disassembler needn't know anything
254 about disassemble_info. */
257 print_insn_normal (cd
, dis_info
, insn
, fields
, pc
, length
)
260 const CGEN_INSN
*insn
;
265 const CGEN_SYNTAX
*syntax
= CGEN_INSN_SYNTAX (insn
);
266 disassemble_info
*info
= (disassemble_info
*) dis_info
;
267 const CGEN_SYNTAX_CHAR_TYPE
*syn
;
269 CGEN_INIT_PRINT (cd
);
271 for (syn
= CGEN_SYNTAX_STRING (syntax
); *syn
; ++syn
)
273 if (CGEN_SYNTAX_MNEMONIC_P (*syn
))
275 (*info
->fprintf_func
) (info
->stream
, "%s", CGEN_INSN_MNEMONIC (insn
));
278 if (CGEN_SYNTAX_CHAR_P (*syn
))
280 (*info
->fprintf_func
) (info
->stream
, "%c", CGEN_SYNTAX_CHAR (*syn
));
284 /* We have an operand. */
285 openrisc_cgen_print_operand (cd
, CGEN_SYNTAX_FIELD (*syn
), info
,
286 fields
, CGEN_INSN_ATTRS (insn
), pc
, length
);
290 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
292 Returns 0 if all is well, non-zero otherwise. */
294 read_insn (cd
, pc
, info
, buf
, buflen
, ex_info
, insn_value
)
295 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED
;
297 disassemble_info
*info
;
300 CGEN_EXTRACT_INFO
*ex_info
;
301 unsigned long *insn_value
;
303 int status
= (*info
->read_memory_func
) (pc
, buf
, buflen
, info
);
306 (*info
->memory_error_func
) (status
, pc
, info
);
310 ex_info
->dis_info
= info
;
311 ex_info
->valid
= (1 << buflen
) - 1;
312 ex_info
->insn_bytes
= buf
;
314 *insn_value
= bfd_get_bits (buf
, buflen
* 8, info
->endian
== BFD_ENDIAN_BIG
);
318 /* Utility to print an insn.
319 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
320 The result is the size of the insn in bytes or zero for an unknown insn
321 or -1 if an error occurs fetching data (memory_error_func will have
325 print_insn (cd
, pc
, info
, buf
, buflen
)
328 disassemble_info
*info
;
332 CGEN_INSN_INT insn_value
;
333 const CGEN_INSN_LIST
*insn_list
;
334 CGEN_EXTRACT_INFO ex_info
;
336 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
337 insn_value
= cgen_get_insn_value (cd
, buf
, buflen
* 8);
339 /* Fill in ex_info fields like read_insn would. Don't actually call
340 read_insn, since the incoming buffer is already read (and possibly
341 modified a la m32r). */
342 ex_info
.valid
= (1 << buflen
) - 1;
343 ex_info
.dis_info
= info
;
344 ex_info
.insn_bytes
= buf
;
346 /* The instructions are stored in hash lists.
347 Pick the first one and keep trying until we find the right one. */
349 insn_list
= CGEN_DIS_LOOKUP_INSN (cd
, buf
, insn_value
);
350 while (insn_list
!= NULL
)
352 const CGEN_INSN
*insn
= insn_list
->insn
;
355 unsigned long insn_value_cropped
;
357 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
358 /* not needed as insn shouldn't be in hash lists if not supported */
359 /* Supported by this cpu? */
360 if (! openrisc_cgen_insn_supported (cd
, insn
))
362 insn_list
= CGEN_DIS_NEXT_INSN (insn_list
);
367 /* Basic bit mask must be correct. */
368 /* ??? May wish to allow target to defer this check until the extract
371 /* Base size may exceed this instruction's size. Extract the
372 relevant part from the buffer. */
373 if ((CGEN_INSN_BITSIZE (insn
) / 8) < buflen
&&
374 ((unsigned) CGEN_INSN_BITSIZE (insn
) / 8) <= sizeof (unsigned long))
375 insn_value_cropped
= bfd_get_bits (buf
, CGEN_INSN_BITSIZE (insn
),
376 info
->endian
== BFD_ENDIAN_BIG
);
378 insn_value_cropped
= insn_value
;
380 if ((insn_value_cropped
& CGEN_INSN_BASE_MASK (insn
))
381 == CGEN_INSN_BASE_VALUE (insn
))
383 /* Printing is handled in two passes. The first pass parses the
384 machine insn and extracts the fields. The second pass prints
387 /* Make sure the entire insn is loaded into insn_value, if it
389 if ( (unsigned) CGEN_INSN_BITSIZE (insn
) > cd
->base_insn_bitsize
&&
390 ((unsigned) CGEN_INSN_BITSIZE (insn
) / 8) <= sizeof (unsigned long))
392 unsigned long full_insn_value
;
393 int rc
= read_insn (cd
, pc
, info
, buf
,
394 CGEN_INSN_BITSIZE (insn
) / 8,
395 & ex_info
, & full_insn_value
);
398 length
= CGEN_EXTRACT_FN (cd
, insn
)
399 (cd
, insn
, &ex_info
, full_insn_value
, &fields
, pc
);
402 length
= CGEN_EXTRACT_FN (cd
, insn
)
403 (cd
, insn
, &ex_info
, insn_value_cropped
, &fields
, pc
);
405 /* length < 0 -> error */
410 CGEN_PRINT_FN (cd
, insn
) (cd
, info
, insn
, &fields
, pc
, length
);
411 /* length is in bits, result is in bytes */
416 insn_list
= CGEN_DIS_NEXT_INSN (insn_list
);
422 /* Default value for CGEN_PRINT_INSN.
423 The result is the size of the insn in bytes or zero for an unknown insn
424 or -1 if an error occured fetching bytes. */
426 #ifndef CGEN_PRINT_INSN
427 #define CGEN_PRINT_INSN default_print_insn
431 default_print_insn (cd
, pc
, info
)
434 disassemble_info
*info
;
436 char buf
[CGEN_MAX_INSN_SIZE
];
440 /* Attempt to read the base part of the insn. */
441 buflen
= cd
->base_insn_bitsize
/ 8;
442 status
= (*info
->read_memory_func
) (pc
, buf
, buflen
, info
);
444 /* Try again with the minimum part, if min < base. */
445 if (status
!= 0 && (cd
->min_insn_bitsize
< cd
->base_insn_bitsize
))
447 buflen
= cd
->min_insn_bitsize
/ 8;
448 status
= (*info
->read_memory_func
) (pc
, buf
, buflen
, info
);
453 (*info
->memory_error_func
) (status
, pc
, info
);
457 return print_insn (cd
, pc
, info
, buf
, buflen
);
461 Print one instruction from PC on INFO->STREAM.
462 Return the size of the instruction (in bytes). */
465 print_insn_openrisc (pc
, info
)
467 disassemble_info
*info
;
469 static CGEN_CPU_DESC cd
= 0;
471 static int prev_mach
;
472 static int prev_endian
;
475 int endian
= (info
->endian
== BFD_ENDIAN_BIG
477 : CGEN_ENDIAN_LITTLE
);
478 enum bfd_architecture arch
;
480 /* ??? gdb will set mach but leave the architecture as "unknown" */
481 #ifndef CGEN_BFD_ARCH
482 #define CGEN_BFD_ARCH bfd_arch_openrisc
485 if (arch
== bfd_arch_unknown
)
486 arch
= CGEN_BFD_ARCH
;
488 /* There's no standard way to compute the machine or isa number
489 so we leave it to the target. */
490 #ifdef CGEN_COMPUTE_MACH
491 mach
= CGEN_COMPUTE_MACH (info
);
496 #ifdef CGEN_COMPUTE_ISA
497 isa
= CGEN_COMPUTE_ISA (info
);
502 /* If we've switched cpu's, close the current table and open a new one. */
506 || endian
!= prev_endian
))
508 openrisc_cgen_cpu_close (cd
);
512 /* If we haven't initialized yet, initialize the opcode table. */
515 const bfd_arch_info_type
*arch_type
= bfd_lookup_arch (arch
, mach
);
516 const char *mach_name
;
520 mach_name
= arch_type
->printable_name
;
524 prev_endian
= endian
;
525 cd
= openrisc_cgen_cpu_open (CGEN_CPU_OPEN_ISAS
, prev_isa
,
526 CGEN_CPU_OPEN_BFDMACH
, mach_name
,
527 CGEN_CPU_OPEN_ENDIAN
, prev_endian
,
531 openrisc_cgen_init_dis (cd
);
534 /* We try to have as much common code as possible.
535 But at this point some targets need to take over. */
536 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
537 but if not possible try to move this hook elsewhere rather than
539 length
= CGEN_PRINT_INSN (cd
, pc
, info
);
545 (*info
->fprintf_func
) (info
->stream
, UNKNOWN_INSN_MSG
);
546 return cd
->default_insn_bitsize
/ 8;