unicorn/samples/sample_arm64.c

86 lines
2.4 KiB
C

/* Unicorn Emulator Engine */
/* By Nguyen Anh Quynh, 2015 */
/* Sample code to demonstrate how to emulate ARM64 code */
#include <inttypes.h>
#include <unicorn/unicorn.h>
// code to be emulated
#define ARM_CODE "\xab\x01\x0f\x8b" // add x11, x13, x15
// memory address where emulation starts
#define ADDRESS 0x10000
static void hook_block(uch handle, uint64_t address, uint32_t size, void *user_data)
{
printf(">>> Tracing basic block at 0x%"PRIx64 ", block size = 0x%x\n", address, size);
}
static void hook_code(uch handle, uint64_t address, uint32_t size, void *user_data)
{
printf(">>> Tracing instruction at 0x%"PRIx64 ", instruction size = 0x%x\n", address, size);
}
static void test_arm64(void)
{
uch handle;
uc_err err;
uch trace1, trace2;
int64_t x11 = 0x1234; // X11 register
int64_t x13 = 0x6789; // X13 register
int64_t x15 = 0x3333; // X15 register
printf("Emulate ARM64 code\n");
// Initialize emulator in ARM mode
err = uc_open(UC_ARCH_ARM64, UC_MODE_ARM, &handle);
if (err) {
printf("Failed on uc_open() with error returned: %u (%s)\n",
err, uc_strerror(err));
return;
}
// map 2MB memory for this emulation
uc_mem_map(handle, ADDRESS, 2 * 1024 * 1024);
// write machine code to be emulated to memory
uc_mem_write(handle, ADDRESS, (uint8_t *)ARM_CODE, sizeof(ARM_CODE) - 1);
// initialize machine registers
uc_reg_write(handle, UC_ARM64_REG_X11, &x11);
uc_reg_write(handle, UC_ARM64_REG_X13, &x13);
uc_reg_write(handle, UC_ARM64_REG_X15, &x15);
// tracing all basic blocks with customized callback
uc_hook_add(handle, &trace1, UC_HOOK_BLOCK, hook_block, NULL, (uint64_t)1, (uint64_t)0);
// tracing one instruction at ADDRESS with customized callback
uc_hook_add(handle, &trace2, UC_HOOK_CODE, hook_code, NULL, (uint64_t)ADDRESS, (uint64_t)ADDRESS);
// emulate machine code in infinite time (last param = 0), or when
// finishing all the code.
err = uc_emu_start(handle, ADDRESS, ADDRESS + sizeof(ARM_CODE) -1, 0, 0);
if (err) {
printf("Failed on uc_emu_start() with error returned: %u\n", err);
}
// now print out some registers
printf(">>> Emulation done. Below is the CPU context\n");
uc_reg_read(handle, UC_ARM64_REG_X11, &x11);
printf(">>> X11 = 0x%" PRIx64 "\n", x11);
uc_close(&handle);
}
int main(int argc, char **argv, char **envp)
{
test_arm64();
return 0;
}