ShuriZma
/
mgba
mirror of https://github.com/mgba-emu/mgba.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

More thumb decompilation

This commit is contained in:
Jeffrey Pfau 2013-11-01 01:57:48 -07:00
parent e60cbfaf84
commit f32155526b
2 changed files with 48 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
src/arm/decoder-thumb.c
View File

@ -380,6 +380,11 @@ static int _decodeRegisterList(int list, char* buffer, int blen) {
return total;
}
static int _decodeMemory(struct ARMMemoryAccess memory, char* buffer, int blen) {
// TODO
return 0;
}
static const char* _thumbMnemonicStrings[] = {
"ill",
"adc",
@ -437,12 +442,51 @@ int ARMDisassembleThumb(uint16_t opcode, char* buffer, int blen) {
ADVANCE(written);
strncpy(buffer, "!, ", blen);
ADVANCE(3);
// Fall through
case THUMB_MN_POP:
case THUMB_MN_PUSH:
written = _decodeRegisterList(info.op1.immediate, buffer, blen);
ADVANCE(written);
break;
default:
if (info.operandFormat & ARM_OPERAND_IMMEDIATE_1) {
written = snprintf(buffer, blen, "#%i", info.op1.immediate);
ADVANCE(written);
} else if (info.operandFormat & ARM_OPERAND_MEMORY_1) {
written = _decodeMemory(info.memory, buffer, blen);
ADVANCE(written);
} else if (info.operandFormat & ARM_OPERAND_REGISTER_1) {
written = _decodeRegister(info.op1.reg, buffer, blen);
ADVANCE(written);
}
if (info.operandFormat & ARM_OPERAND_2) {
strncpy(buffer, ", ", blen);
ADVANCE(2);
}
if (info.operandFormat & ARM_OPERAND_IMMEDIATE_2) {
written = snprintf(buffer, blen, "#%i", info.op2.immediate);
ADVANCE(written);
} else if (info.operandFormat & ARM_OPERAND_MEMORY_2) {
written = _decodeMemory(info.memory, buffer, blen);
ADVANCE(written);
} else if (info.operandFormat & ARM_OPERAND_REGISTER_2) {
written = _decodeRegister(info.op2.reg, buffer, blen);
ADVANCE(written);
}
if (info.operandFormat & ARM_OPERAND_3) {
strncpy(buffer, ", ", blen);
ADVANCE(2);
}
if (info.operandFormat & ARM_OPERAND_IMMEDIATE_3) {
written = snprintf(buffer, blen, "#%i", info.op3.immediate);
ADVANCE(written);
} else if (info.operandFormat & ARM_OPERAND_MEMORY_3) {
written = _decodeMemory(info.memory, buffer, blen);
ADVANCE(written);
} else if (info.operandFormat & ARM_OPERAND_REGISTER_3) {
written = _decodeRegister(info.op1.reg, buffer, blen);
ADVANCE(written);
}
break;
}
buffer[total] = '\0';

5
src/arm/decoder.h
View File

@ -18,6 +18,7 @@ enum ARMOperandFormat {
ARM_OPERAND_AFFECTED_1 = 0x00000008,
ARM_OPERAND_SHIFT_REGISTER_1 = 0x00000010,
ARM_OPERAND_SHIFT_IMMEDIATE_1 = 0x00000020,
ARM_OPERAND_1 = 0x000000FF,
ARM_OPERAND_REGISTER_2 = 0x00000100,
ARM_OPERAND_IMMEDIATE_2 = 0x00000200,
@ -25,13 +26,15 @@ enum ARMOperandFormat {
ARM_OPERAND_AFFECTED_2 = 0x00000800,
ARM_OPERAND_SHIFT_REGISTER_2 = 0x00001000,
ARM_OPERAND_SHIFT_IMMEDIATE_2 = 0x00002000,
ARM_OPERAND_2 = 0x0000FF00,
ARM_OPERAND_REGISTER_3 = 0x00010000,
ARM_OPERAND_IMMEDIATE_3 = 0x00020000,
ARM_OPERAND_MEMORY_3 = 0x00040000,
ARM_OPERAND_AFFECTED_3 = 0x00080000,
ARM_OPERAND_SHIFT_REGISTER_3 = 0x00100000,
ARM_OPERAND_SHIFT_IMMEDIATE_3 = 0x00200000
ARM_OPERAND_SHIFT_IMMEDIATE_3 = 0x00200000,
ARM_OPERAND_3 = 0x00FF0000
};
enum ARMMemoryFormat {