| 1 |
|
/* |
| 2 |
|
* mon_disass.cpp - Disassemblers |
| 3 |
|
* |
| 4 |
< |
* mon (C) 1997-2000 Christian Bauer, Marc Hellwig |
| 4 |
> |
* cxmon (C) 1997-2002 Christian Bauer, Marc Hellwig |
| 5 |
|
* |
| 6 |
|
* This program is free software; you can redistribute it and/or modify |
| 7 |
|
* it under the terms of the GNU General Public License as published by |
| 24 |
|
|
| 25 |
|
#include "mon.h" |
| 26 |
|
#include "mon_disass.h" |
| 27 |
+ |
|
| 28 |
+ |
#include "mon_atraps.h" |
| 29 |
|
#include "mon_lowmem.h" |
| 30 |
|
|
| 31 |
|
|
| 32 |
+ |
// Flag: enable MacOS A-Trap and LM globals lookup in 68k disassembler |
| 33 |
+ |
bool mon_macos_mode = false; |
| 34 |
+ |
|
| 35 |
+ |
|
| 36 |
|
/* |
| 37 |
|
* GNU disassembler callbacks |
| 38 |
|
*/ |
| 40 |
|
extern "C" { |
| 41 |
|
#include "disass/dis-asm.h" |
| 42 |
|
|
| 43 |
< |
int buffer_read_memory(bfd_vma from, bfd_byte *to, int length, struct disassemble_info *info) |
| 43 |
> |
int buffer_read_memory(bfd_vma from, bfd_byte *to, unsigned int length, struct disassemble_info *info) |
| 44 |
|
{ |
| 45 |
|
while (length--) |
| 46 |
|
*to++ = mon_read_byte(from++); |
| 56 |
|
|
| 57 |
|
void generic_print_address(bfd_vma addr, struct disassemble_info *info) |
| 58 |
|
{ |
| 59 |
< |
if (lookup_lowmem && ((addr >= 0x100 && addr < 0x400) || (addr >= 0x800 && addr < 0xe00) || (addr >= 0x1e00 && addr < 0x3000))) { |
| 60 |
< |
// Look for address in low memory globals table |
| 61 |
< |
const lowmem_info *p = lowmem; |
| 62 |
< |
while (p->name) { |
| 63 |
< |
if (addr >= p[0].addr && addr < p[1].addr) { |
| 64 |
< |
if (addr == p[0].addr) |
| 65 |
< |
info->fprintf_func(info->stream, "%s", p->name); |
| 66 |
< |
else |
| 67 |
< |
info->fprintf_func(info->stream, "%s+%d", p->name, addr - p->addr); |
| 68 |
< |
return; |
| 59 |
> |
if (lookup_lowmem && addr >= 0x100 && addr < 0x3000) { |
| 60 |
> |
if (((addr >= 0x400 && addr < 0x800) || (addr >= 0xe00 && addr < 0x1e00)) && ((addr & 3) == 0)) { |
| 61 |
> |
// Look for address in A-Trap table |
| 62 |
> |
uint16 opcode = (addr < 0xe00 ? 0xa000 + (addr - 0x400) / 4 : 0xa800 + (addr - 0xe00) / 4); |
| 63 |
> |
uint16 mask = (addr < 0xe00 ? 0xf8ff : 0xffff); |
| 64 |
> |
const atrap_info *p = atraps; |
| 65 |
> |
while (p->word) { |
| 66 |
> |
if ((p->word & mask) == opcode) { |
| 67 |
> |
info->fprintf_func(info->stream, p->name); |
| 68 |
> |
return; |
| 69 |
> |
} |
| 70 |
> |
p++; |
| 71 |
> |
} |
| 72 |
> |
} else { |
| 73 |
> |
// Look for address in low memory globals table |
| 74 |
> |
const lowmem_info *p = lowmem; |
| 75 |
> |
while (p->name) { |
| 76 |
> |
if (addr >= p[0].addr && addr < p[1].addr) { |
| 77 |
> |
if (addr == p[0].addr) |
| 78 |
> |
info->fprintf_func(info->stream, "%s", p->name); |
| 79 |
> |
else |
| 80 |
> |
info->fprintf_func(info->stream, "%s+%d", p->name, addr - p->addr); |
| 81 |
> |
return; |
| 82 |
> |
} |
| 83 |
> |
p++; |
| 84 |
|
} |
| 64 |
– |
p++; |
| 85 |
|
} |
| 86 |
|
} |
| 87 |
|
info->fprintf_func(info->stream, "$%08x", addr); |
| 92 |
|
return 0; |
| 93 |
|
} |
| 94 |
|
|
| 95 |
+ |
void print_68k_invalid_opcode(unsigned long opcode, struct disassemble_info *info) |
| 96 |
+ |
{ |
| 97 |
+ |
if (mon_macos_mode) { |
| 98 |
+ |
// Look for MacOS A-Trap |
| 99 |
+ |
const atrap_info *p = atraps; |
| 100 |
+ |
while (p->word) { |
| 101 |
+ |
if (p->word == opcode) { |
| 102 |
+ |
info->fprintf_func(info->stream, p->name); |
| 103 |
+ |
return; |
| 104 |
+ |
} |
| 105 |
+ |
p++; |
| 106 |
+ |
} |
| 107 |
+ |
} |
| 108 |
+ |
info->fprintf_func(info->stream, "?"); |
| 109 |
+ |
} |
| 110 |
+ |
|
| 111 |
|
}; |
| 112 |
|
|
| 113 |
|
|
| 147 |
|
INIT_DISASSEMBLE_INFO(info, (FILE *)&sfile, (fprintf_ftype)mon_sprintf); |
| 148 |
|
|
| 149 |
|
// Disassemble instruction |
| 150 |
< |
lookup_lowmem = true; |
| 150 |
> |
lookup_lowmem = mon_macos_mode; |
| 151 |
|
int num = print_insn_m68k(adr, &info); |
| 152 |
< |
if (num >= 2) |
| 153 |
< |
fprintf(f, "%04x ", mon_read_half(adr)); |
| 154 |
< |
else |
| 155 |
< |
fprintf(f, " "); |
| 156 |
< |
if (num >= 4) |
| 157 |
< |
fprintf(f, "%04x ", mon_read_half(adr + 2)); |
| 158 |
< |
else |
| 123 |
< |
fprintf(f, " "); |
| 124 |
< |
if (num >= 6) |
| 125 |
< |
fprintf(f, "%04x ", mon_read_half(adr + 4)); |
| 126 |
< |
else |
| 127 |
< |
fprintf(f, " "); |
| 152 |
> |
|
| 153 |
> |
for (int i=0; i<6; i+=2) { |
| 154 |
> |
if (num > i) |
| 155 |
> |
fprintf(f, "%04x ", mon_read_half(adr + i)); |
| 156 |
> |
else |
| 157 |
> |
fprintf(f, " "); |
| 158 |
> |
} |
| 159 |
|
if (num == 8) |
| 160 |
|
fprintf(f, "%04x\t%s\n", mon_read_half(adr + 6), buf); |
| 161 |
< |
else if (num >= 8) |
| 161 |
> |
else if (num > 8) |
| 162 |
|
fprintf(f, "...\t%s\n", buf); |
| 163 |
|
else |
| 164 |
|
fprintf(f, " \t%s\n", buf); |
| 165 |
+ |
|
| 166 |
|
return num; |
| 167 |
|
} |
| 168 |
|
|
| 169 |
< |
int disass_x86(FILE *f, uint32 adr) |
| 169 |
> |
int disass_x86(FILE *f, uint32 adr, uint32 bits) |
| 170 |
|
{ |
| 171 |
|
// Initialize info for GDB disassembler |
| 172 |
|
disassemble_info info; |
| 175 |
|
sfile.buffer = buf; |
| 176 |
|
sfile.current = buf; |
| 177 |
|
INIT_DISASSEMBLE_INFO(info, (FILE *)&sfile, (fprintf_ftype)mon_sprintf); |
| 178 |
+ |
if (bits == 16) |
| 179 |
+ |
info.mach = bfd_mach_i386_i8086; |
| 180 |
+ |
else if (bits == 64) |
| 181 |
+ |
info.mach = bfd_mach_x86_64; |
| 182 |
|
|
| 183 |
|
// Disassemble instruction |
| 184 |
|
lookup_lowmem = false; |
| 185 |
< |
int num = print_insn_i386(adr, &info); |
| 186 |
< |
fprintf(f, "%s\n", buf); |
| 185 |
> |
int num = print_insn_i386_att(adr, &info); |
| 186 |
> |
|
| 187 |
> |
for (int i=0; i<6; i++) { |
| 188 |
> |
if (num > i) |
| 189 |
> |
fprintf(f, "%02x ", mon_read_byte(adr + i)); |
| 190 |
> |
else |
| 191 |
> |
fprintf(f, " "); |
| 192 |
> |
} |
| 193 |
> |
if (num == 7) |
| 194 |
> |
fprintf(f, "%02x\t%s\n", mon_read_byte(adr + 7), buf); |
| 195 |
> |
else if (num > 7) |
| 196 |
> |
fprintf(f, "..\t%s\n", buf); |
| 197 |
> |
else |
| 198 |
> |
fprintf(f, " \t%s\n", buf); |
| 199 |
> |
|
| 200 |
|
return num; |
| 201 |
|
} |
