2000-08-04 02:21:43 +00:00
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/* Disassembler interface for targets using CGEN. -*- C -*-
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CGEN: Cpu tools GENerator
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THIS FILE IS MACHINE GENERATED WITH CGEN.
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- the resultant file is machine generated, cgen-dis.in isn't
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Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU Binutils and GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* ??? Eventually more and more of this stuff can go to cpu-independent files.
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Keep that in mind. */
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#include "sysdep.h"
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#include <stdio.h>
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#include "ansidecl.h"
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#include "dis-asm.h"
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#include "bfd.h"
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#include "symcat.h"
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#include "@prefix@-desc.h"
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#include "@prefix@-opc.h"
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#include "opintl.h"
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/* Default text to print if an instruction isn't recognized. */
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#define UNKNOWN_INSN_MSG _("*unknown*")
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static void print_normal
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PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned int, bfd_vma, int));
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static void print_address
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PARAMS ((CGEN_CPU_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int));
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static void print_keyword
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PARAMS ((CGEN_CPU_DESC, PTR, CGEN_KEYWORD *, long, unsigned int));
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static void print_insn_normal
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PARAMS ((CGEN_CPU_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *,
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bfd_vma, int));
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static int print_insn PARAMS ((CGEN_CPU_DESC, bfd_vma,
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disassemble_info *, char *, int));
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static int default_print_insn
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PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *));
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/* -- disassembler routines inserted here */
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/* Default print handler. */
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static void
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print_normal (cd, dis_info, value, attrs, pc, length)
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#ifdef CGEN_PRINT_NORMAL
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CGEN_CPU_DESC cd;
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#else
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CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
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#endif
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PTR dis_info;
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long value;
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unsigned int attrs;
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#ifdef CGEN_PRINT_NORMAL
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bfd_vma pc;
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int length;
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#else
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bfd_vma pc ATTRIBUTE_UNUSED;
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int length ATTRIBUTE_UNUSED;
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#endif
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{
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disassemble_info *info = (disassemble_info *) dis_info;
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#ifdef CGEN_PRINT_NORMAL
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CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
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#endif
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/* Print the operand as directed by the attributes. */
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if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
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; /* nothing to do */
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else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
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(*info->fprintf_func) (info->stream, "%ld", value);
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else
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(*info->fprintf_func) (info->stream, "0x%lx", value);
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}
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/* Default address handler. */
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static void
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print_address (cd, dis_info, value, attrs, pc, length)
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#ifdef CGEN_PRINT_NORMAL
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CGEN_CPU_DESC cd;
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#else
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CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
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#endif
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PTR dis_info;
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bfd_vma value;
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unsigned int attrs;
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#ifdef CGEN_PRINT_NORMAL
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bfd_vma pc;
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int length;
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#else
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bfd_vma pc ATTRIBUTE_UNUSED;
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int length ATTRIBUTE_UNUSED;
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#endif
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{
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disassemble_info *info = (disassemble_info *) dis_info;
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#ifdef CGEN_PRINT_ADDRESS
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CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
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#endif
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/* Print the operand as directed by the attributes. */
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if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
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; /* nothing to do */
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else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
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(*info->print_address_func) (value, info);
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else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
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(*info->print_address_func) (value, info);
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else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
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(*info->fprintf_func) (info->stream, "%ld", (long) value);
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else
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(*info->fprintf_func) (info->stream, "0x%lx", (long) value);
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}
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/* Keyword print handler. */
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static void
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print_keyword (cd, dis_info, keyword_table, value, attrs)
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CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
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PTR dis_info;
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CGEN_KEYWORD *keyword_table;
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long value;
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unsigned int attrs ATTRIBUTE_UNUSED;
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{
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disassemble_info *info = (disassemble_info *) dis_info;
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const CGEN_KEYWORD_ENTRY *ke;
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ke = cgen_keyword_lookup_value (keyword_table, value);
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if (ke != NULL)
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(*info->fprintf_func) (info->stream, "%s", ke->name);
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else
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(*info->fprintf_func) (info->stream, "???");
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}
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/* Default insn printer.
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DIS_INFO is defined as `PTR' so the disassembler needn't know anything
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about disassemble_info. */
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static void
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print_insn_normal (cd, dis_info, insn, fields, pc, length)
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CGEN_CPU_DESC cd;
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PTR dis_info;
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const CGEN_INSN *insn;
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CGEN_FIELDS *fields;
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bfd_vma pc;
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int length;
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{
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const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
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disassemble_info *info = (disassemble_info *) dis_info;
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const unsigned char *syn;
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CGEN_INIT_PRINT (cd);
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for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
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{
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if (CGEN_SYNTAX_MNEMONIC_P (*syn))
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{
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(*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
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continue;
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}
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if (CGEN_SYNTAX_CHAR_P (*syn))
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{
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(*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
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continue;
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}
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/* We have an operand. */
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@arch@_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
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fields, CGEN_INSN_ATTRS (insn), pc, length);
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}
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}
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2000-08-28 18:17:54 +00:00
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/* Subroutine of print_insn. Reads an insn into the given buffers and updates
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the extract info.
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Returns 0 if all is well, non-zero otherwise. */
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2000-08-04 02:21:43 +00:00
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static int
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2000-08-28 18:17:54 +00:00
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read_insn (cd, pc, info, buf, buflen, ex_info, insn_value)
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2000-08-04 02:21:43 +00:00
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CGEN_CPU_DESC cd;
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bfd_vma pc;
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disassemble_info *info;
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char *buf;
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int buflen;
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2000-08-28 18:17:54 +00:00
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CGEN_EXTRACT_INFO *ex_info;
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unsigned long *insn_value;
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2000-08-04 02:21:43 +00:00
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{
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2000-08-28 18:17:54 +00:00
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int status = (*info->read_memory_func) (pc, buf, buflen, info);
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if (status != 0)
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{
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(*info->memory_error_func) (status, pc, info);
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return -1;
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}
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2000-08-04 02:21:43 +00:00
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2000-08-28 18:17:54 +00:00
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ex_info->dis_info = info;
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ex_info->valid = (1 << buflen) - 1;
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ex_info->insn_bytes = buf;
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2000-08-04 02:21:43 +00:00
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switch (buflen)
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{
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case 1:
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2000-08-28 18:17:54 +00:00
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*insn_value = buf[0];
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2000-08-04 02:21:43 +00:00
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break;
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case 2:
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2000-08-28 18:17:54 +00:00
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*insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf);
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2000-08-04 02:21:43 +00:00
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break;
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case 4:
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2000-08-28 18:17:54 +00:00
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*insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf);
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2000-08-04 02:21:43 +00:00
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break;
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default:
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abort ();
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}
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2000-08-28 18:17:54 +00:00
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return 0;
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}
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/* Utility to print an insn.
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BUF is the base part of the insn, target byte order, BUFLEN bytes long.
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The result is the size of the insn in bytes or zero for an unknown insn
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or -1 if an error occurs fetching data (memory_error_func will have
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been called). */
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static int
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print_insn (cd, pc, info, buf, buflen)
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CGEN_CPU_DESC cd;
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bfd_vma pc;
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disassemble_info *info;
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char *buf;
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int buflen;
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{
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unsigned long insn_value;
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const CGEN_INSN_LIST *insn_list;
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CGEN_EXTRACT_INFO ex_info;
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int rc = read_insn (cd, pc, info, buf, buflen, & ex_info, & insn_value);
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if (rc != 0)
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return rc;
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2000-08-04 02:21:43 +00:00
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/* The instructions are stored in hash lists.
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Pick the first one and keep trying until we find the right one. */
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insn_list = CGEN_DIS_LOOKUP_INSN (cd, buf, insn_value);
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while (insn_list != NULL)
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{
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const CGEN_INSN *insn = insn_list->insn;
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CGEN_FIELDS fields;
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int length;
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#ifdef CGEN_VALIDATE_INSN_SUPPORTED
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/* not needed as insn shouldn't be in hash lists if not supported */
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/* Supported by this cpu? */
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if (! @arch@_cgen_insn_supported (cd, insn))
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{
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insn_list = CGEN_DIS_NEXT_INSN (insn_list);
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continue;
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}
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#endif
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/* Basic bit mask must be correct. */
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/* ??? May wish to allow target to defer this check until the extract
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handler. */
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if ((insn_value & CGEN_INSN_BASE_MASK (insn))
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== CGEN_INSN_BASE_VALUE (insn))
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{
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/* Printing is handled in two passes. The first pass parses the
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machine insn and extracts the fields. The second pass prints
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them. */
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2000-08-28 18:17:54 +00:00
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#if CGEN_INT_INSN_P
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/* Make sure the entire insn is loaded into insn_value. */
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if (CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize)
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{
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unsigned long full_insn_value;
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int rc = read_insn (cd, pc, info, buf,
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CGEN_INSN_BITSIZE (insn) / 8,
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& ex_info, & full_insn_value);
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if (rc != 0)
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return rc;
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length = CGEN_EXTRACT_FN (cd, insn)
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(cd, insn, &ex_info, full_insn_value, &fields, pc);
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}
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else
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#endif
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2000-08-04 02:21:43 +00:00
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length = CGEN_EXTRACT_FN (cd, insn)
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(cd, insn, &ex_info, insn_value, &fields, pc);
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/* length < 0 -> error */
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if (length < 0)
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return length;
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if (length > 0)
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{
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CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
|
|
|
|
|
/* length is in bits, result is in bytes */
|
|
|
|
|
return length / 8;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
insn_list = CGEN_DIS_NEXT_INSN (insn_list);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Default value for CGEN_PRINT_INSN.
|
|
|
|
|
The result is the size of the insn in bytes or zero for an unknown insn
|
|
|
|
|
or -1 if an error occured fetching bytes. */
|
|
|
|
|
|
|
|
|
|
#ifndef CGEN_PRINT_INSN
|
|
|
|
|
#define CGEN_PRINT_INSN default_print_insn
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
default_print_insn (cd, pc, info)
|
|
|
|
|
CGEN_CPU_DESC cd;
|
|
|
|
|
bfd_vma pc;
|
|
|
|
|
disassemble_info *info;
|
|
|
|
|
{
|
|
|
|
|
char buf[CGEN_MAX_INSN_SIZE];
|
|
|
|
|
int status;
|
|
|
|
|
|
|
|
|
|
/* Read the base part of the insn. */
|
|
|
|
|
|
|
|
|
|
status = (*info->read_memory_func) (pc, buf, cd->base_insn_bitsize / 8, info);
|
|
|
|
|
if (status != 0)
|
|
|
|
|
{
|
|
|
|
|
(*info->memory_error_func) (status, pc, info);
|
|
|
|
|
return -1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return print_insn (cd, pc, info, buf, cd->base_insn_bitsize / 8);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Main entry point.
|
|
|
|
|
Print one instruction from PC on INFO->STREAM.
|
|
|
|
|
Return the size of the instruction (in bytes). */
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
print_insn_@arch@ (pc, info)
|
|
|
|
|
bfd_vma pc;
|
|
|
|
|
disassemble_info *info;
|
|
|
|
|
{
|
|
|
|
|
static CGEN_CPU_DESC cd = 0;
|
|
|
|
|
static int prev_isa;
|
|
|
|
|
static int prev_mach;
|
|
|
|
|
static int prev_endian;
|
|
|
|
|
int length;
|
|
|
|
|
int isa,mach;
|
|
|
|
|
int endian = (info->endian == BFD_ENDIAN_BIG
|
|
|
|
|
? CGEN_ENDIAN_BIG
|
|
|
|
|
: CGEN_ENDIAN_LITTLE);
|
|
|
|
|
enum bfd_architecture arch;
|
|
|
|
|
|
|
|
|
|
/* ??? gdb will set mach but leave the architecture as "unknown" */
|
|
|
|
|
#ifndef CGEN_BFD_ARCH
|
|
|
|
|
#define CGEN_BFD_ARCH bfd_arch_@arch@
|
|
|
|
|
#endif
|
|
|
|
|
arch = info->arch;
|
|
|
|
|
if (arch == bfd_arch_unknown)
|
|
|
|
|
arch = CGEN_BFD_ARCH;
|
|
|
|
|
|
|
|
|
|
/* There's no standard way to compute the isa number (e.g. for arm thumb)
|
|
|
|
|
so we leave it to the target. */
|
|
|
|
|
#ifdef CGEN_COMPUTE_ISA
|
|
|
|
|
isa = CGEN_COMPUTE_ISA (info);
|
|
|
|
|
#else
|
|
|
|
|
isa = 0;
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
mach = info->mach;
|
|
|
|
|
|
|
|
|
|
/* If we've switched cpu's, close the current table and open a new one. */
|
|
|
|
|
if (cd
|
|
|
|
|
&& (isa != prev_isa
|
|
|
|
|
|| mach != prev_mach
|
|
|
|
|
|| endian != prev_endian))
|
|
|
|
|
{
|
|
|
|
|
@arch@_cgen_cpu_close (cd);
|
|
|
|
|
cd = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If we haven't initialized yet, initialize the opcode table. */
|
|
|
|
|
if (! cd)
|
|
|
|
|
{
|
|
|
|
|
const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
|
|
|
|
|
const char *mach_name;
|
|
|
|
|
|
|
|
|
|
if (!arch_type)
|
|
|
|
|
abort ();
|
|
|
|
|
mach_name = arch_type->printable_name;
|
|
|
|
|
|
|
|
|
|
prev_isa = isa;
|
|
|
|
|
prev_mach = mach;
|
|
|
|
|
prev_endian = endian;
|
|
|
|
|
cd = @arch@_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
|
|
|
|
|
CGEN_CPU_OPEN_BFDMACH, mach_name,
|
|
|
|
|
CGEN_CPU_OPEN_ENDIAN, prev_endian,
|
|
|
|
|
CGEN_CPU_OPEN_END);
|
|
|
|
|
if (!cd)
|
|
|
|
|
abort ();
|
|
|
|
|
@arch@_cgen_init_dis (cd);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* We try to have as much common code as possible.
|
|
|
|
|
But at this point some targets need to take over. */
|
|
|
|
|
/* ??? Some targets may need a hook elsewhere. Try to avoid this,
|
|
|
|
|
but if not possible try to move this hook elsewhere rather than
|
|
|
|
|
have two hooks. */
|
|
|
|
|
length = CGEN_PRINT_INSN (cd, pc, info);
|
|
|
|
|
if (length > 0)
|
|
|
|
|
return length;
|
|
|
|
|
if (length < 0)
|
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
|
|
(*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
|
|
|
|
|
return cd->default_insn_bitsize / 8;
|
|
|
|
|
}
|