134 lines
4.0 KiB
C
134 lines
4.0 KiB
C
/* Unicorn Emulator Engine */
|
|
/* By Nguyen Anh Quynh, 2015 */
|
|
|
|
/* Sample code to demonstrate how to emulate Mips code (big endian) */
|
|
|
|
#include <inttypes.h>
|
|
|
|
#include <unicorn/unicorn.h>
|
|
|
|
|
|
// code to be emulated
|
|
#define MIPS_CODE_EB "\x34\x21\x34\x56" // ori $at, $at, 0x3456;
|
|
#define MIPS_CODE_EL "\x56\x34\x21\x34" // ori $at, $at, 0x3456;
|
|
|
|
// memory address where emulation starts
|
|
#define ADDRESS 0x10000
|
|
|
|
static void hook_block(struct uc_struct *uc, 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(struct uc_struct *uc, 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_mips_eb(void)
|
|
{
|
|
struct uc_struct *uc;
|
|
uc_err err;
|
|
uc_hook_h trace1, trace2;
|
|
|
|
int r1 = 0x6789; // R1 register
|
|
|
|
printf("Emulate MIPS code (big-endian)\n");
|
|
|
|
// Initialize emulator in MIPS mode
|
|
err = uc_open(UC_ARCH_MIPS, UC_MODE_MIPS32 + UC_MODE_BIG_ENDIAN, &uc);
|
|
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(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
uc_mem_write(uc, ADDRESS, (uint8_t *)MIPS_CODE_EB, sizeof(MIPS_CODE_EB) - 1);
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_MIPS_REG_1, &r1);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, (uint64_t)1, (uint64_t)0);
|
|
|
|
// tracing one instruction at ADDRESS with customized callback
|
|
uc_hook_add(uc, &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(uc, ADDRESS, ADDRESS + sizeof(MIPS_CODE_EB) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned: %u (%s)\n", err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_MIPS_REG_1, &r1);
|
|
printf(">>> R1 = 0x%x\n", r1);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
static void test_mips_el(void)
|
|
{
|
|
struct uc_struct *uc;
|
|
uc_err err;
|
|
uc_hook_h trace1, trace2;
|
|
|
|
int r1 = 0x6789; // R1 register
|
|
|
|
printf("===========================\n");
|
|
printf("Emulate MIPS code (little-endian)\n");
|
|
|
|
// Initialize emulator in MIPS mode
|
|
err = uc_open(UC_ARCH_MIPS, UC_MODE_MIPS32, &uc);
|
|
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(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
uc_mem_write(uc, ADDRESS, (uint8_t *)MIPS_CODE_EL, sizeof(MIPS_CODE_EL) - 1);
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_MIPS_REG_1, &r1);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, (uint64_t)1, (uint64_t)0);
|
|
|
|
// tracing one instruction at ADDRESS with customized callback
|
|
uc_hook_add(uc, &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(uc, ADDRESS, ADDRESS + sizeof(MIPS_CODE_EL) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned: %u (%s)\n", err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_MIPS_REG_1, &r1);
|
|
printf(">>> R1 = 0x%x\n", r1);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
int main(int argc, char **argv, char **envp)
|
|
{
|
|
test_mips_eb();
|
|
test_mips_el();
|
|
|
|
return 0;
|
|
}
|