unicorn/bindings/java/samples/Sample_mips.java

152 lines
4.8 KiB
Java

/*
Java bindings for the Unicorn Emulator Engine
Copyright(c) 2015 Chris Eagle
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/* Unicorn Emulator Engine */
/* By Nguyen Anh Quynh, 2015 */
/* Sample code to demonstrate how to emulate Mips code (big endian) */
import unicorn.*;
public class Sample_mips {
// code to be emulated
public static final byte[] MIPS_CODE_EB = {52,33,52,86};
public static final byte[] MIPS_CODE_EL = {86,52,33,52};
// 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;
}
public static final byte[] toBytes(long val) {
byte[] res = new byte[8];
for (int i = 0; i < 8; i++) {
res[i] = (byte)(val & 0xff);
val >>>= 8;
}
return res;
}
// callback for tracing basic blocks
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_mips_eb()
{
byte[] r1 = toBytes(0x6789); // R1 register
System.out.print("Emulate MIPS code (big-endian)\n");
// Initialize emulator in MIPS mode
Unicorn u = new Unicorn(Unicorn.UC_ARCH_MIPS, Unicorn.UC_MODE_MIPS32 + Unicorn.UC_MODE_BIG_ENDIAN);
// 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, MIPS_CODE_EB);
// initialize machine registers
u.reg_write(Unicorn.UC_MIPS_REG_1, r1);
// 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 + MIPS_CODE_EB.length, 0, 0);
// now print out some registers
System.out.print(">>> Emulation done. Below is the CPU context\n");
r1 = u.reg_read(Unicorn.UC_MIPS_REG_1, 4);
System.out.print(String.format(">>> R1 = 0x%x\n", toInt(r1)));
u.close();
}
static void test_mips_el()
{
byte[] r1 = toBytes(0x6789); // R1 register
System.out.print("===========================\n");
System.out.print("Emulate MIPS code (little-endian)\n");
// Initialize emulator in MIPS mode
Unicorn u = new Unicorn(Unicorn.UC_ARCH_MIPS, Unicorn.UC_MODE_MIPS32);
// 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, MIPS_CODE_EL);
// initialize machine registers
u.reg_write(Unicorn.UC_MIPS_REG_1, r1);
// 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 + MIPS_CODE_EL.length, 0, 0);
// now print out some registers
System.out.print(">>> Emulation done. Below is the CPU context\n");
r1 = u.reg_read(Unicorn.UC_MIPS_REG_1, 4);
System.out.print(String.format(">>> R1 = 0x%x\n", toInt(r1)));
u.close();
}
public static void main(String args[])
{
test_mips_eb();
test_mips_el();
}
}