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lxdream.org :: lxdream/src/x86dasm/x86dasm.c
lxdream 0.9.1
released Jun 29
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filename src/x86dasm/x86dasm.c
changeset 429:e581b90c3fb3
prev376:8c7587af5a5d
next480:d28c2992f5ee
author nkeynes
date Mon Oct 08 11:52:13 2007 +0000 (14 years ago)
permissions -rw-r--r--
last change Fix compilation warnings
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     1 /**
     2  * $Id: x86dasm.c,v 1.4 2007-10-08 11:48:10 nkeynes Exp $
     3  *
     4  * Wrapper around i386-dis to supply the same behaviour as the other
     5  * disassembly functions.
     6  *
     7  * Copyright (c) 2005 Nathan Keynes.
     8  *
     9  * This program is free software; you can redistribute it and/or modify
    10  * it under the terms of the GNU General Public License as published by
    11  * the Free Software Foundation; either version 2 of the License, or
    12  * (at your option) any later version.
    13  *
    14  * This program is distributed in the hope that it will be useful,
    15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    17  * GNU General Public License for more details.
    18  */
    20 #include <stdarg.h>
    21 #include "x86dasm.h"
    22 #include "bfd.h"
    23 #include "dis-asm.h"
    24 #include "sh4/sh4core.h"
    26 extern const struct reg_desc_struct sh4_reg_map[];
    27 const struct cpu_desc_struct x86_cpu_desc = 
    28     { "x86", x86_disasm_instruction, NULL, mem_has_page, 
    29       NULL, NULL, NULL, 1, 
    30       (char *)&sh4r, sizeof(sh4r), sh4_reg_map,
    31       &sh4r.pc };
    33 static int x86_disasm_output( void *data, const char *format, ... );
    34 static void x86_print_address( bfd_vma memaddr, struct disassemble_info *info );
    36 static struct disassemble_info x86_disasm_info;
    38 static x86_symbol *x86_symtab;
    39 static int x86_num_symbols = 0;   
    41 void x86_disasm_block(FILE *out, void *start, uint32_t len)
    42 {
    43     uint32_t start_addr = (uint32_t)start;
    44     uint32_t pc;
    45     x86_disasm_init( start, start_addr, len );
    46     for( pc = start_addr; pc < start_addr + len;  ) {
    47 	char buf[256];
    48 	char op[256];
    49 	uint32_t pc2 = x86_disasm_instruction( pc, buf, sizeof(buf), op );
    50 	fprintf( out, "%08X: %-20s %s\n", pc, op, buf );
    51 	pc = pc2;
    52     }
    53 }
    55 void x86_disasm_init(unsigned char *buf, uint32_t vma, int buflen)
    56 {
    57     init_disassemble_info( &x86_disasm_info, NULL, x86_disasm_output );
    58     x86_disasm_info.arch = bfd_arch_i386;
    59     x86_disasm_info.mach = bfd_mach_i386_i386_intel_syntax;
    60     x86_disasm_info.endian = BFD_ENDIAN_LITTLE;
    61     x86_disasm_info.buffer = buf;
    62     x86_disasm_info.buffer_vma = vma;
    63     x86_disasm_info.buffer_length = buflen;
    64     x86_disasm_info.print_address_func = x86_print_address;
    65 }
    67 void x86_set_symtab( x86_symbol *symtab, int num_symbols )
    68 {
    69     x86_symtab = symtab;
    70     x86_num_symbols = num_symbols;
    71 }
    73 static const char *x86_find_symbol( bfd_vma memaddr, struct disassemble_info *info )
    74 {
    75     int i;
    76     for( i=0; i<x86_num_symbols; i++ ) {
    77 	if( x86_symtab[i].ptr == (void *)(uint32_t)memaddr ) {
    78 	    return x86_symtab[i].name;
    79 	}
    80     }
    81     return NULL;
    82 }
    84 static void x86_print_address( bfd_vma memaddr, struct disassemble_info *info )
    85 {
    86     const char *sym = x86_find_symbol(memaddr, info);
    87     info->fprintf_func( info->stream, "%08X", memaddr );
    88     if( sym != NULL ) {
    89 	info->fprintf_func( info->stream, " <%s>", sym );
    90     }
    91 }
    93 uint32_t x86_disasm_instruction( uint32_t pc, char *buf, int len, char *opcode )
    94 {
    95     int count, i;
    97     x86_disasm_info.stream = buf;
    98     buf[0] = 0;
    99     count = print_insn_i386_att( pc, &x86_disasm_info );
   100     if( count != 0 ) {
   101 	unsigned char tmp[count];
   102 	x86_disasm_info.read_memory_func( pc, tmp, count, &x86_disasm_info );
   103 	for( i=0; i<count; i++ ) {
   104 	    sprintf( opcode, "%02X ", ((unsigned int)tmp[i])&0xFF );
   105 	    opcode += 3;
   106 	}
   107 	*(opcode-1) = '\0';
   108     }
   109     return pc + count;
   110 }
   112 int x86_disasm_output( void *data, const char *format, ... )
   113 {
   114     char *p = (char *)data;
   115     va_list ap;
   116     int n;
   117     p += strlen(p);
   118     va_start( ap, format );
   119     n = vsprintf( p, format, ap );
   120     va_end( ap );
   121     return n;
   122 }
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