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) 1996-2016 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.
34 #include "libiberty.h"
35 #include "ip2k-desc.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. */
63 print_fr (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
66 unsigned int attrs ATTRIBUTE_UNUSED,
67 bfd_vma pc ATTRIBUTE_UNUSED,
68 int length ATTRIBUTE_UNUSED)
70 disassemble_info *info = (disassemble_info *) dis_info;
71 const CGEN_KEYWORD_ENTRY *ke;
72 extern CGEN_KEYWORD ip2k_cgen_opval_register_names;
76 if (value == 0) /* This is (IP). */
78 (*info->fprintf_func) (info->stream, "%s", "(IP)");
82 offsettest = value >> 7;
83 offsetvalue = value & 0x7F;
85 /* Check to see if first two bits are 10 -> (DP). */
89 (*info->fprintf_func) (info->stream, "%s","(DP)");
91 (*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue, "(DP)");
95 /* Check to see if first two bits are 11 -> (SP). */
99 (*info->fprintf_func) (info->stream, "%s", "(SP)");
101 (*info->fprintf_func) (info->stream, "$%lx%s", offsetvalue,"(SP)");
105 /* Attempt to print as a register keyword. */
106 ke = cgen_keyword_lookup_value (& ip2k_cgen_opval_register_names, value);
109 (*info->fprintf_func) (info->stream, "%s", ke->name);
111 /* Print as an address literal. */
112 (*info->fprintf_func) (info->stream, "$%02lx", value);
116 print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
119 unsigned int attrs ATTRIBUTE_UNUSED,
120 bfd_vma pc ATTRIBUTE_UNUSED,
121 int length ATTRIBUTE_UNUSED)
123 disassemble_info *info = (disassemble_info *) dis_info;
125 (*info->fprintf_func) (info->stream, "$%lx", value);
129 print_dollarhex8 (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
132 unsigned int attrs ATTRIBUTE_UNUSED,
133 bfd_vma pc ATTRIBUTE_UNUSED,
134 int length ATTRIBUTE_UNUSED)
136 disassemble_info *info = (disassemble_info *) dis_info;
138 (*info->fprintf_func) (info->stream, "$%02lx", value);
142 print_dollarhex_addr16h (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
145 unsigned int attrs ATTRIBUTE_UNUSED,
146 bfd_vma pc ATTRIBUTE_UNUSED,
147 int length ATTRIBUTE_UNUSED)
149 disassemble_info *info = (disassemble_info *) dis_info;
151 /* This is a loadh instruction. Shift the value to the left
152 by 8 bits so that disassembled code will reassemble properly. */
153 value = ((value << 8) & 0xFF00);
155 (*info->fprintf_func) (info->stream, "$%04lx", value);
159 print_dollarhex_addr16l (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
162 unsigned int attrs ATTRIBUTE_UNUSED,
163 bfd_vma pc ATTRIBUTE_UNUSED,
164 int length ATTRIBUTE_UNUSED)
166 disassemble_info *info = (disassemble_info *) dis_info;
168 (*info->fprintf_func) (info->stream, "$%04lx", value);
172 print_dollarhex_p (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
175 unsigned int attrs ATTRIBUTE_UNUSED,
176 bfd_vma pc ATTRIBUTE_UNUSED,
177 int length ATTRIBUTE_UNUSED)
179 disassemble_info *info = (disassemble_info *) dis_info;
181 value = ((value << 14) & 0x1C000);
182 ;value = (value & 0x1FFFF);
183 (*info->fprintf_func) (info->stream, "$%05lx", value);
187 print_dollarhex_cj (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
190 unsigned int attrs ATTRIBUTE_UNUSED,
191 bfd_vma pc ATTRIBUTE_UNUSED,
192 int length ATTRIBUTE_UNUSED)
194 disassemble_info *info = (disassemble_info *) dis_info;
196 value = ((value << 1) & 0x1FFFF);
197 (*info->fprintf_func) (info->stream, "$%05lx", value);
201 print_decimal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
204 unsigned int attrs ATTRIBUTE_UNUSED,
205 bfd_vma pc ATTRIBUTE_UNUSED,
206 int length ATTRIBUTE_UNUSED)
208 disassemble_info *info = (disassemble_info *) dis_info;
210 (*info->fprintf_func) (info->stream, "%ld", value);
217 void ip2k_cgen_print_operand
218 (CGEN_CPU_DESC, int, PTR, CGEN_FIELDS *, void const *, bfd_vma, int);
220 /* Main entry point for printing operands.
221 XINFO is a `void *' and not a `disassemble_info *' to not put a requirement
222 of dis-asm.h on cgen.h.
224 This function is basically just a big switch statement. Earlier versions
225 used tables to look up the function to use, but
226 - if the table contains both assembler and disassembler functions then
227 the disassembler contains much of the assembler and vice-versa,
228 - there's a lot of inlining possibilities as things grow,
229 - using a switch statement avoids the function call overhead.
231 This function could be moved into `print_insn_normal', but keeping it
232 separate makes clear the interface between `print_insn_normal' and each of
236 ip2k_cgen_print_operand (CGEN_CPU_DESC cd,
240 void const *attrs ATTRIBUTE_UNUSED,
244 disassemble_info *info = (disassemble_info *) xinfo;
248 case IP2K_OPERAND_ADDR16CJP :
249 print_dollarhex_cj (cd, info, fields->f_addr16cjp, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
251 case IP2K_OPERAND_ADDR16H :
252 print_dollarhex_addr16h (cd, info, fields->f_imm8, 0, pc, length);
254 case IP2K_OPERAND_ADDR16L :
255 print_dollarhex_addr16l (cd, info, fields->f_imm8, 0, pc, length);
257 case IP2K_OPERAND_ADDR16P :
258 print_dollarhex_p (cd, info, fields->f_page3, 0, pc, length);
260 case IP2K_OPERAND_BITNO :
261 print_decimal (cd, info, fields->f_bitno, 0, pc, length);
263 case IP2K_OPERAND_CBIT :
264 print_normal (cd, info, 0, 0, pc, length);
266 case IP2K_OPERAND_DCBIT :
267 print_normal (cd, info, 0, 0, pc, length);
269 case IP2K_OPERAND_FR :
270 print_fr (cd, info, fields->f_reg, 0|(1<<CGEN_OPERAND_ABS_ADDR), pc, length);
272 case IP2K_OPERAND_LIT8 :
273 print_dollarhex8 (cd, info, fields->f_imm8, 0|(1<<CGEN_OPERAND_SIGNED), pc, length);
275 case IP2K_OPERAND_PABITS :
276 print_normal (cd, info, 0, 0, pc, length);
278 case IP2K_OPERAND_RETI3 :
279 print_dollarhex (cd, info, fields->f_reti3, 0, pc, length);
281 case IP2K_OPERAND_ZBIT :
282 print_normal (cd, info, 0, 0, pc, length);
286 /* xgettext:c-format */
287 fprintf (stderr, _("Unrecognized field %d while printing insn.\n"),
293 cgen_print_fn * const ip2k_cgen_print_handlers[] =
300 ip2k_cgen_init_dis (CGEN_CPU_DESC cd)
302 ip2k_cgen_init_opcode_table (cd);
303 ip2k_cgen_init_ibld_table (cd);
304 cd->print_handlers = & ip2k_cgen_print_handlers[0];
305 cd->print_operand = ip2k_cgen_print_operand;
309 /* Default print handler. */
312 print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
316 bfd_vma pc ATTRIBUTE_UNUSED,
317 int length ATTRIBUTE_UNUSED)
319 disassemble_info *info = (disassemble_info *) dis_info;
321 /* Print the operand as directed by the attributes. */
322 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
323 ; /* nothing to do */
324 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
325 (*info->fprintf_func) (info->stream, "%ld", value);
327 (*info->fprintf_func) (info->stream, "0x%lx", value);
330 /* Default address handler. */
333 print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
337 bfd_vma pc ATTRIBUTE_UNUSED,
338 int length ATTRIBUTE_UNUSED)
340 disassemble_info *info = (disassemble_info *) dis_info;
342 /* Print the operand as directed by the attributes. */
343 if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
344 ; /* Nothing to do. */
345 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
346 (*info->print_address_func) (value, info);
347 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
348 (*info->print_address_func) (value, info);
349 else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
350 (*info->fprintf_func) (info->stream, "%ld", (long) value);
352 (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
355 /* Keyword print handler. */
358 print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
360 CGEN_KEYWORD *keyword_table,
362 unsigned int attrs ATTRIBUTE_UNUSED)
364 disassemble_info *info = (disassemble_info *) dis_info;
365 const CGEN_KEYWORD_ENTRY *ke;
367 ke = cgen_keyword_lookup_value (keyword_table, value);
369 (*info->fprintf_func) (info->stream, "%s", ke->name);
371 (*info->fprintf_func) (info->stream, "???");
374 /* Default insn printer.
376 DIS_INFO is defined as `void *' so the disassembler needn't know anything
377 about disassemble_info. */
380 print_insn_normal (CGEN_CPU_DESC cd,
382 const CGEN_INSN *insn,
387 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
388 disassemble_info *info = (disassemble_info *) dis_info;
389 const CGEN_SYNTAX_CHAR_TYPE *syn;
391 CGEN_INIT_PRINT (cd);
393 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
395 if (CGEN_SYNTAX_MNEMONIC_P (*syn))
397 (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
400 if (CGEN_SYNTAX_CHAR_P (*syn))
402 (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
406 /* We have an operand. */
407 ip2k_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
408 fields, CGEN_INSN_ATTRS (insn), pc, length);
412 /* Subroutine of print_insn. Reads an insn into the given buffers and updates
414 Returns 0 if all is well, non-zero otherwise. */
417 read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
419 disassemble_info *info,
422 CGEN_EXTRACT_INFO *ex_info,
423 unsigned long *insn_value)
425 int status = (*info->read_memory_func) (pc, buf, buflen, info);
429 (*info->memory_error_func) (status, pc, info);
433 ex_info->dis_info = info;
434 ex_info->valid = (1 << buflen) - 1;
435 ex_info->insn_bytes = buf;
437 *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
441 /* Utility to print an insn.
442 BUF is the base part of the insn, target byte order, BUFLEN bytes long.
443 The result is the size of the insn in bytes or zero for an unknown insn
444 or -1 if an error occurs fetching data (memory_error_func will have
448 print_insn (CGEN_CPU_DESC cd,
450 disassemble_info *info,
454 CGEN_INSN_INT insn_value;
455 const CGEN_INSN_LIST *insn_list;
456 CGEN_EXTRACT_INFO ex_info;
459 /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
460 basesize = cd->base_insn_bitsize < buflen * 8 ?
461 cd->base_insn_bitsize : buflen * 8;
462 insn_value = cgen_get_insn_value (cd, buf, basesize);
465 /* Fill in ex_info fields like read_insn would. Don't actually call
466 read_insn, since the incoming buffer is already read (and possibly
467 modified a la m32r). */
468 ex_info.valid = (1 << buflen) - 1;
469 ex_info.dis_info = info;
470 ex_info.insn_bytes = buf;
472 /* The instructions are stored in hash lists.
473 Pick the first one and keep trying until we find the right one. */
475 insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
476 while (insn_list != NULL)
478 const CGEN_INSN *insn = insn_list->insn;
481 unsigned long insn_value_cropped;
483 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
484 /* Not needed as insn shouldn't be in hash lists if not supported. */
485 /* Supported by this cpu? */
486 if (! ip2k_cgen_insn_supported (cd, insn))
488 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
493 /* Basic bit mask must be correct. */
494 /* ??? May wish to allow target to defer this check until the extract
497 /* Base size may exceed this instruction's size. Extract the
498 relevant part from the buffer. */
499 if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
500 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
501 insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
502 info->endian == BFD_ENDIAN_BIG);
504 insn_value_cropped = insn_value;
506 if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
507 == CGEN_INSN_BASE_VALUE (insn))
509 /* Printing is handled in two passes. The first pass parses the
510 machine insn and extracts the fields. The second pass prints
513 /* Make sure the entire insn is loaded into insn_value, if it
515 if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
516 (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
518 unsigned long full_insn_value;
519 int rc = read_insn (cd, pc, info, buf,
520 CGEN_INSN_BITSIZE (insn) / 8,
521 & ex_info, & full_insn_value);
524 length = CGEN_EXTRACT_FN (cd, insn)
525 (cd, insn, &ex_info, full_insn_value, &fields, pc);
528 length = CGEN_EXTRACT_FN (cd, insn)
529 (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
531 /* Length < 0 -> error. */
536 CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
537 /* Length is in bits, result is in bytes. */
542 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
548 /* Default value for CGEN_PRINT_INSN.
549 The result is the size of the insn in bytes or zero for an unknown insn
550 or -1 if an error occured fetching bytes. */
552 #ifndef CGEN_PRINT_INSN
553 #define CGEN_PRINT_INSN default_print_insn
557 default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
559 bfd_byte buf[CGEN_MAX_INSN_SIZE];
563 /* Attempt to read the base part of the insn. */
564 buflen = cd->base_insn_bitsize / 8;
565 status = (*info->read_memory_func) (pc, buf, buflen, info);
567 /* Try again with the minimum part, if min < base. */
568 if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
570 buflen = cd->min_insn_bitsize / 8;
571 status = (*info->read_memory_func) (pc, buf, buflen, info);
576 (*info->memory_error_func) (status, pc, info);
580 return print_insn (cd, pc, info, buf, buflen);
584 Print one instruction from PC on INFO->STREAM.
585 Return the size of the instruction (in bytes). */
587 typedef struct cpu_desc_list
589 struct cpu_desc_list *next;
597 print_insn_ip2k (bfd_vma pc, disassemble_info *info)
599 static cpu_desc_list *cd_list = 0;
600 cpu_desc_list *cl = 0;
601 static CGEN_CPU_DESC cd = 0;
602 static CGEN_BITSET *prev_isa;
603 static int prev_mach;
604 static int prev_endian;
608 int endian = (info->endian == BFD_ENDIAN_BIG
610 : CGEN_ENDIAN_LITTLE);
611 enum bfd_architecture arch;
613 /* ??? gdb will set mach but leave the architecture as "unknown" */
614 #ifndef CGEN_BFD_ARCH
615 #define CGEN_BFD_ARCH bfd_arch_ip2k
618 if (arch == bfd_arch_unknown)
619 arch = CGEN_BFD_ARCH;
621 /* There's no standard way to compute the machine or isa number
622 so we leave it to the target. */
623 #ifdef CGEN_COMPUTE_MACH
624 mach = CGEN_COMPUTE_MACH (info);
629 #ifdef CGEN_COMPUTE_ISA
631 static CGEN_BITSET *permanent_isa;
634 permanent_isa = cgen_bitset_create (MAX_ISAS);
636 cgen_bitset_clear (isa);
637 cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
640 isa = info->insn_sets;
643 /* If we've switched cpu's, try to find a handle we've used before */
645 && (cgen_bitset_compare (isa, prev_isa) != 0
647 || endian != prev_endian))
650 for (cl = cd_list; cl; cl = cl->next)
652 if (cgen_bitset_compare (cl->isa, isa) == 0 &&
654 cl->endian == endian)
663 /* If we haven't initialized yet, initialize the opcode table. */
666 const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
667 const char *mach_name;
671 mach_name = arch_type->printable_name;
673 prev_isa = cgen_bitset_copy (isa);
675 prev_endian = endian;
676 cd = ip2k_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
677 CGEN_CPU_OPEN_BFDMACH, mach_name,
678 CGEN_CPU_OPEN_ENDIAN, prev_endian,
683 /* Save this away for future reference. */
684 cl = xmalloc (sizeof (struct cpu_desc_list));
692 ip2k_cgen_init_dis (cd);
695 /* We try to have as much common code as possible.
696 But at this point some targets need to take over. */
697 /* ??? Some targets may need a hook elsewhere. Try to avoid this,
698 but if not possible try to move this hook elsewhere rather than
700 length = CGEN_PRINT_INSN (cd, pc, info);
706 (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
707 return cd->default_insn_bitsize / 8;