unicorn/bindings/java/samples/Sample_arm.java

131 lines
4.2 KiB
Java

/* Unicorn Emulator Engine */
/* By Nguyen Anh Quynh, 2015 */
/* Sample code to demonstrate how to emulate ARM code */
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));
}
}
static void test_arm()
{
byte[] r0 = {0x34, 0x12, 0, 0}; // R0 register
byte[] r2 = {(byte)0x89, 0x67, 0, 0}; // R1 register
byte[] r3 = {0x33, 0x33, 0, 0}; // R2 register
byte[] 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);
// 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, 4);
r1 = u.reg_read(Unicorn.UC_ARM_REG_R1, 4);
System.out.print(String.format(">>> R0 = 0x%x\n", toInt(r0)));
System.out.print(String.format(">>> R1 = 0x%x\n", toInt(r1)));
u.close();
}
static void test_thumb()
{
byte[] sp = {0x34, 0x12, 0, 0}; // 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);
// 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, 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, 4);
System.out.print(String.format(">>> SP = 0x%x\n", toInt(sp)));
u.close();
}
public static void main(String args[])
{
test_arm();
System.out.print("==========================\n");
test_thumb();
}
}