lxdream 0.9.1| filename | src/x86dasm/x86dasm.c |
| changeset | 1094:d2324eb67223 |
| prev | 1092:7c4ffe27e7b5 |
| author | nkeynes |
| date | Mon Feb 15 17:27:14 2010 +1000 (14 years ago) |
| permissions | -rw-r--r-- |
| last change | Hook up the fake bios boot Use fakebios if invoked with -b, or if there's no boot rom loaded |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
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/x86dasm.h"
23 #include "x86dasm/bfd.h"
24 #include "x86dasm/dis-asm.h"
25 #include "sh4/sh4.h"
26 #include "sh4/sh4trans.h"
28 const struct cpu_desc_struct x86_cpu_desc =
29 { "x86", (disasm_func_t)x86_disasm_instruction, NULL, mem_has_page,
30 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 1,
31 NULL, 0, NULL, 0, 0,
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 xlat_dump_block( void *block )
43 {
44 xlat_disasm_block( stderr, block );
45 }
47 void xlat_disasm_block( FILE *out, void *block )
48 {
49 uint32_t buflen = xlat_get_code_size(block);
50 x86_set_symtab( NULL, 0 );
51 x86_disasm_block( out, block, buflen );
52 }
54 void x86_disasm_block(FILE *out, void *start, uint32_t len)
55 {
56 uintptr_t start_addr = (uintptr_t)start;
57 uintptr_t pc;
58 x86_disasm_init( start, start_addr, len );
59 for( pc = start_addr; pc < start_addr + len; ) {
60 char buf[256];
61 char op[256];
62 uintptr_t pc2 = x86_disasm_instruction( pc, buf, sizeof(buf), op );
63 fprintf( out, "%08X: %-20s %s\n", (unsigned int)pc, op, buf );
64 pc = pc2;
65 }
66 }
68 void x86_disasm_init()
69 {
70 init_disassemble_info( &x86_disasm_info, NULL, x86_disasm_output );
71 x86_disasm_info.arch = bfd_arch_i386;
72 #if SIZEOF_VOID_P == 8
73 x86_disasm_info.mach = bfd_mach_x86_64_intel_syntax;
74 #else
75 x86_disasm_info.mach = bfd_mach_i386_i386_intel_syntax;
76 #endif
77 x86_disasm_info.endian = BFD_ENDIAN_LITTLE;
78 x86_disasm_info.buffer = 0;
79 x86_disasm_info.print_address_func = x86_print_address;
80 }
82 void x86_set_symtab( x86_symbol *symtab, int num_symbols )
83 {
84 x86_symtab = symtab;
85 x86_num_symbols = num_symbols;
86 }
88 static const char *x86_find_symbol( bfd_vma memaddr, struct disassemble_info *info )
89 {
90 int i;
91 for( i=0; i<x86_num_symbols; i++ ) {
92 if( x86_symtab[i].ptr == (void *)(uintptr_t)memaddr ) {
93 return x86_symtab[i].name;
94 }
95 }
96 return NULL;
97 }
99 static void x86_print_address( bfd_vma memaddr, struct disassemble_info *info )
100 {
101 const char *sym = x86_find_symbol(memaddr, info);
102 info->fprintf_func( info->stream, "%08X", memaddr );
103 if( sym != NULL ) {
104 info->fprintf_func( info->stream, " <%s>", sym );
105 }
106 }
108 void x86_print_symbolic_operand( char *buf, int hex, uintptr_t disp )
109 {
110 const char *sym = x86_find_symbol(disp, NULL);
111 if( sym != NULL ) {
112 snprintf( buf, 50, "<%s>", sym );
113 } else if( hex ) {
114 sprintf( buf, "0x%x", disp );
115 } else {
116 sprintf( buf, "%d", (int)disp );
117 }
118 }
120 uintptr_t x86_disasm_instruction( uintptr_t pc, char *buf, int len, char *opcode )
121 {
122 int count, i;
124 x86_disasm_info.stream = buf;
125 buf[0] = 0;
126 count = print_insn_i386_att( pc, &x86_disasm_info );
127 if( count != 0 ) {
128 unsigned char tmp[count];
129 x86_disasm_info.read_memory_func( pc, tmp, count, &x86_disasm_info );
130 for( i=0; i<count; i++ ) {
131 sprintf( opcode, "%02X ", ((unsigned int)tmp[i])&0xFF );
132 opcode += 3;
133 }
134 *(opcode-1) = '\0';
135 }
136 return pc + count;
137 }
139 int x86_disasm_output( void *data, const char *format, ... )
140 {
141 char *p = (char *)data;
142 va_list ap;
143 int n;
144 p += strlen(p);
145 va_start( ap, format );
146 n = vsprintf( p, format, ap );
147 va_end( ap );
148 return n;
149 }
.