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[FEAT] Decompiler

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[BUG] Several address calculation errors
This commit is contained in:
Raimon Zamora
2021-05-05 09:34:58 +02:00
parent 1516043f17
commit 37fdf1f42f
6 changed files with 80 additions and 4 deletions
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59
decompiler.cpp Normal file
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#include "decompiler.h"
#include <iostream>
#include <fstream>
#include <string.h>
#include "parser.h"
#define SIMPLE(X) f << X << std::endl; pos++; break
// [RZC 05/05/2021] To solve alignment problems on ARM architectures we have to first copy the 4 bytes to an aligned byte array, then cast it to float
#define FVAR(X) memcpy(data, &code[pos+1], 4); f << X << " " << *((float*)data) << std::endl; pos += 5; break
#define IVAR(X) memcpy(data, &code[pos+1], 4); f << X << " " << *((uint32_t*)data) << std::endl; pos += 5; break
void decompiler_save(const uint8_t *code, const int size) {
uint8_t data[4];
int pos = 0;
float fval = 0;
uint32_t ival = 0;
std::ofstream f("decompiled.txt");
if (f.is_open()) {
while (pos < size) {
switch (code[pos]) {
case OP_NOP: SIMPLE("NOP");
case OP_PUSH: FVAR("PUSH");
case OP_POP: SIMPLE("POP");
case OP_DUP: SIMPLE("DUP");
case OP_SWAP: SIMPLE("SWAP");
case OP_LD: IVAR("LD");
case OP_ST: IVAR("ST");
case OP_LDL: IVAR("LDL");
case OP_STL: IVAR("STL");
case OP_JMP: IVAR("JMP");
case OP_JNT: IVAR("JNT");
case OP_JTR: IVAR("JTR");
case OP_RET: SIMPLE("RET");
case OP_CALL: IVAR("CALL");
case OP_CALLEX: IVAR("CALLEX");
case OP_ADD: SIMPLE("ADD");
case OP_SUB: SIMPLE("SUB");
case OP_MUL: SIMPLE("MUL");
case OP_DIV: SIMPLE("DIV");
case OP_MOD: SIMPLE("MOD");
case OP_AND: SIMPLE("AND");
case OP_OR: SIMPLE("OR");
case OP_NOT: SIMPLE("NOT");
case OP_NEG: SIMPLE("NEG");
case OP_INC: SIMPLE("INC");
case OP_DEC: SIMPLE("DEC");
case OP_CONCAT: SIMPLE("CONCAT");
case OP_EQ: SIMPLE("EQ");
case OP_NEQ: SIMPLE("NEQ");
case OP_LT: SIMPLE("LT");
case OP_GT: SIMPLE("GT");
case OP_LEQ: SIMPLE("LEQ");
case OP_GEQ: SIMPLE("GEQ");
case OP_SLEEP: SIMPLE("SLEEP");
}
}
f.close();
}
}