134 lines
4.3 KiB
Java
134 lines
4.3 KiB
Java
/* Unicorn Emulator Engine */
|
|
/* By Nguyen Anh Quynh, 2015 */
|
|
|
|
/* Sample code to demonstrate how to emulate ARM code */
|
|
|
|
package samples;
|
|
|
|
import unicorn.*;
|
|
|
|
public class Sample_arm {
|
|
|
|
// code to be emulated
|
|
public static final byte[] ARM_CODE =
|
|
{ 55, 0, (byte) 0xa0, (byte) 0xe3, 3, 16, 66, (byte) 0xe0 }; // mov r0, #0x37; sub r1, r2, r3
|
|
public static final byte[] THUMB_CODE = { (byte) 0x83, (byte) 0xb0 }; // sub sp, #0xc
|
|
|
|
// memory address where emulation starts
|
|
public static final int ADDRESS = 0x10000;
|
|
|
|
public static final long toInt(byte val[]) {
|
|
long res = 0;
|
|
for (int i = 0; i < val.length; i++) {
|
|
long v = val[i] & 0xff;
|
|
res = res + (v << (i * 8));
|
|
}
|
|
return res;
|
|
}
|
|
|
|
private static class MyBlockHook implements BlockHook {
|
|
public void hook(Unicorn u, long address, int size, Object user_data) {
|
|
System.out.print(String.format(
|
|
">>> Tracing basic block at 0x%x, block size = 0x%x\n", address,
|
|
size));
|
|
}
|
|
}
|
|
|
|
// callback for tracing instruction
|
|
private static class MyCodeHook implements CodeHook {
|
|
public void hook(Unicorn u, long address, int size, Object user_data) {
|
|
System.out.print(String.format(
|
|
">>> Tracing instruction at 0x%x, instruction size = 0x%x\n",
|
|
address, size));
|
|
}
|
|
}
|
|
|
|
public static void test_arm() {
|
|
|
|
long r0 = 0x1234L; // R0 register
|
|
long r2 = 0x6789L; // R1 register
|
|
long r3 = 0x3333L; // R2 register
|
|
long r1; // R1 register
|
|
|
|
System.out.print("Emulate ARM code\n");
|
|
|
|
// Initialize emulator in ARM mode
|
|
Unicorn u = new Unicorn(Unicorn.UC_ARCH_ARM, Unicorn.UC_MODE_ARM);
|
|
|
|
// map 2MB memory for this emulation
|
|
u.mem_map(ADDRESS, 2 * 1024 * 1024, Unicorn.UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
u.mem_write(ADDRESS, ARM_CODE);
|
|
|
|
// initialize machine registers
|
|
u.reg_write(Unicorn.UC_ARM_REG_R0, r0);
|
|
u.reg_write(Unicorn.UC_ARM_REG_R2, r2);
|
|
u.reg_write(Unicorn.UC_ARM_REG_R3, r3);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
u.hook_add(new MyBlockHook(), 1, 0, null);
|
|
|
|
// tracing one instruction at ADDRESS with customized callback
|
|
u.hook_add(new MyCodeHook(), ADDRESS, ADDRESS, null);
|
|
|
|
// emulate machine code in infinite time (last param = 0), or when
|
|
// finishing all the code.
|
|
u.emu_start(ADDRESS, ADDRESS + ARM_CODE.length, 0, 0);
|
|
|
|
// now print out some registers
|
|
System.out.print(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
r0 = u.reg_read(Unicorn.UC_ARM_REG_R0);
|
|
r1 = u.reg_read(Unicorn.UC_ARM_REG_R1);
|
|
System.out.print(String.format(">>> R0 = 0x%x\n", r0));
|
|
System.out.print(String.format(">>> R1 = 0x%x\n", r1));
|
|
|
|
u.close();
|
|
}
|
|
|
|
public static void test_thumb() {
|
|
|
|
long sp = 0x1234L; // R0 register
|
|
|
|
System.out.print("Emulate THUMB code\n");
|
|
|
|
// Initialize emulator in ARM mode
|
|
Unicorn u = new Unicorn(Unicorn.UC_ARCH_ARM, Unicorn.UC_MODE_THUMB);
|
|
|
|
// map 2MB memory for this emulation
|
|
u.mem_map(ADDRESS, 2 * 1024 * 1024, Unicorn.UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
u.mem_write(ADDRESS, THUMB_CODE);
|
|
|
|
// initialize machine registers
|
|
u.reg_write(Unicorn.UC_ARM_REG_SP, sp);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
u.hook_add(new MyBlockHook(), 1, 0, null);
|
|
|
|
// tracing one instruction at ADDRESS with customized callback
|
|
u.hook_add(new MyCodeHook(), ADDRESS, ADDRESS, null);
|
|
|
|
// emulate machine code in infinite time (last param = 0), or when
|
|
// finishing all the code.
|
|
u.emu_start(ADDRESS | 1, ADDRESS + THUMB_CODE.length, 0, 0);
|
|
|
|
// now print out some registers
|
|
System.out.print(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
sp = u.reg_read(Unicorn.UC_ARM_REG_SP);
|
|
System.out.print(String.format(">>> SP = 0x%x\n", sp));
|
|
|
|
u.close();
|
|
}
|
|
|
|
public static void main(String args[]) {
|
|
test_arm();
|
|
System.out.print("==========================\n");
|
|
test_thumb();
|
|
}
|
|
|
|
}
|