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#include <stdlib.h>
#include <stdio.h>
#include <unicorn/unicorn.h>
#define ADDRESS 0x1000000
#define STACK 0x0020D000
#define STACK2 0x0030D000
#define STACK_SIZE 16384
#define SIZE (2 * 1024 * 1024)
#define CODE32 "\x8B\x04\x24\xA3\x40\x00\x00\x01\xA1\x40\x00\x00\x01"
bool hook_mem_rw(uc_engine *uc, uc_mem_type type, uint64_t address, int size, int64_t value, void *user_data)
{
unsigned int EIP;
uc_reg_read(uc, UC_X86_REG_EIP, &EIP);
switch(type)
{
default:
return false;
break;
case UC_MEM_WRITE:
printf("Hooked write to address 0x%08"PRIX64" with value 0x%08"PRIX64" at EIP %08X\n", address, value, EIP);
return true;
break;
case UC_MEM_READ:
printf("Hooked read from address 0x%08"PRIX64" with value 0x%08"PRIX64" at EIP %08X\n", address, value, EIP);
return true;
break;
}
}
int main(int argc, char *argv[])
{
uc_engine *uc;
uc_hook trace;
uc_err err;
unsigned int EAX, ESP, val = 0x0c0c0c0c, stkval = STACK;
EAX = 0;
ESP = STACK+0x4;
// Initialize emulator in X86-64bit mode
err = uc_open(UC_ARCH_X86, UC_MODE_32, &uc);
if(err) {
printf("Failed on uc_open() with error returned: %s\n", uc_strerror(err));
return 1;
}
err = uc_mem_map(uc, ADDRESS, SIZE, UC_PROT_ALL);
if(err != UC_ERR_OK) {
printf("Failed to map memory %s\n", uc_strerror(err));
return 1;
}
err = uc_mem_write(uc, ADDRESS, CODE32, sizeof(CODE32) - 1);
if(err != UC_ERR_OK) {
printf("Failed to write to memory %s\n", uc_strerror(err));
return 1;
}
loop:
err = uc_mem_map(uc, stkval, STACK_SIZE, UC_PROT_ALL);
if(err != UC_ERR_OK) {
printf("Failed to map memory %s\n", uc_strerror(err));
return 1;
}
err = uc_mem_write(uc, ESP, &val, sizeof(val));
if(err != UC_ERR_OK) {
printf("Failed to write to memory %s\n", uc_strerror(err));
return 1;
}
uc_hook_add(uc, &trace, UC_HOOK_MEM_WRITE | UC_HOOK_MEM_READ, (void *)hook_mem_rw, NULL, 1, 0);
uc_reg_write(uc, UC_X86_REG_EAX, &EAX);
uc_reg_write(uc, UC_X86_REG_ESP, &ESP);
err = uc_emu_start(uc, ADDRESS, ADDRESS + (sizeof(CODE32) - 1), 0, 0);
if(err) {
printf("Failed on uc_emu_start() with error returned %u: %s\n", err, uc_strerror(err));
uc_close(uc);
return 1;
}
uc_reg_read(uc, UC_X86_REG_EAX, &EAX);
printf(">>> EAX = %08X\n", EAX);
if(stkval != STACK2)
{
printf("=== Beginning test two ===\n");
ESP = STACK2+0x4;
EAX = 0;
stkval = STACK2;
goto loop;
}
uc_close(uc);
return 0;
}
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