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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 480:d28c2992f5ee
prev429:e581b90c3fb3
next515:5e5bb1dd369e
author nkeynes
date Wed Oct 31 11:53:35 2007 +0000 (14 years ago)
permissions -rw-r--r--
last change Fix miscellaneous warnings
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     1 /**
     2  * $Id: x86dasm.c,v 1.5 2007-10-31 11:53:35 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 <string.h>
    22 #include "x86dasm.h"
    23 #include "bfd.h"
    24 #include "dis-asm.h"
    25 #include "sh4/sh4core.h"
    27 extern const struct reg_desc_struct sh4_reg_map[];
    28 const struct cpu_desc_struct x86_cpu_desc = 
    29     { "x86", x86_disasm_instruction, NULL, mem_has_page, 
    30       NULL, NULL, NULL, 1, 
    31       (char *)&sh4r, sizeof(sh4r), sh4_reg_map,
    32       &sh4r.pc };
    34 static int x86_disasm_output( void *data, const char *format, ... );
    35 static void x86_print_address( bfd_vma memaddr, struct disassemble_info *info );
    37 static struct disassemble_info x86_disasm_info;
    39 static x86_symbol *x86_symtab;
    40 static int x86_num_symbols = 0;   
    42 void x86_disasm_block(FILE *out, void *start, uint32_t len)
    43 {
    44     uint32_t start_addr = (uint32_t)start;
    45     uint32_t pc;
    46     x86_disasm_init( start, start_addr, len );
    47     for( pc = start_addr; pc < start_addr + len;  ) {
    48 	char buf[256];
    49 	char op[256];
    50 	uint32_t pc2 = x86_disasm_instruction( pc, buf, sizeof(buf), op );
    51 	fprintf( out, "%08X: %-20s %s\n", pc, op, buf );
    52 	pc = pc2;
    53     }
    54 }
    56 void x86_disasm_init(unsigned char *buf, uint32_t vma, int buflen)
    57 {
    58     init_disassemble_info( &x86_disasm_info, NULL, x86_disasm_output );
    59     x86_disasm_info.arch = bfd_arch_i386;
    60     x86_disasm_info.mach = bfd_mach_i386_i386_intel_syntax;
    61     x86_disasm_info.endian = BFD_ENDIAN_LITTLE;
    62     x86_disasm_info.buffer = buf;
    63     x86_disasm_info.buffer_vma = vma;
    64     x86_disasm_info.buffer_length = buflen;
    65     x86_disasm_info.print_address_func = x86_print_address;
    66 }
    68 void x86_set_symtab( x86_symbol *symtab, int num_symbols )
    69 {
    70     x86_symtab = symtab;
    71     x86_num_symbols = num_symbols;
    72 }
    74 static const char *x86_find_symbol( bfd_vma memaddr, struct disassemble_info *info )
    75 {
    76     int i;
    77     for( i=0; i<x86_num_symbols; i++ ) {
    78 	if( x86_symtab[i].ptr == (void *)(uint32_t)memaddr ) {
    79 	    return x86_symtab[i].name;
    80 	}
    81     }
    82     return NULL;
    83 }
    85 static void x86_print_address( bfd_vma memaddr, struct disassemble_info *info )
    86 {
    87     const char *sym = x86_find_symbol(memaddr, info);
    88     info->fprintf_func( info->stream, "%08X", memaddr );
    89     if( sym != NULL ) {
    90 	info->fprintf_func( info->stream, " <%s>", sym );
    91     }
    92 }
    94 uint32_t x86_disasm_instruction( uint32_t pc, char *buf, int len, char *opcode )
    95 {
    96     int count, i;
    98     x86_disasm_info.stream = buf;
    99     buf[0] = 0;
   100     count = print_insn_i386_att( pc, &x86_disasm_info );
   101     if( count != 0 ) {
   102 	unsigned char tmp[count];
   103 	x86_disasm_info.read_memory_func( pc, tmp, count, &x86_disasm_info );
   104 	for( i=0; i<count; i++ ) {
   105 	    sprintf( opcode, "%02X ", ((unsigned int)tmp[i])&0xFF );
   106 	    opcode += 3;
   107 	}
   108 	*(opcode-1) = '\0';
   109     }
   110     return pc + count;
   111 }
   113 int x86_disasm_output( void *data, const char *format, ... )
   114 {
   115     char *p = (char *)data;
   116     va_list ap;
   117     int n;
   118     p += strlen(p);
   119     va_start( ap, format );
   120     n = vsprintf( p, format, ap );
   121     va_end( ap );
   122     return n;
   123 }
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