152 lines
4.8 KiB
Java
152 lines
4.8 KiB
Java
/*
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Java bindings for the Unicorn Emulator Engine
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Copyright(c) 2015 Chris Eagle
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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version 2 as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/* Unicorn Emulator Engine */
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/* By Nguyen Anh Quynh, 2015 */
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/* Sample code to demonstrate how to emulate Mips code (big endian) */
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import unicorn.*;
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public class Sample_mips {
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// code to be emulated
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public static final byte[] MIPS_CODE_EB = {52,33,52,86};
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public static final byte[] MIPS_CODE_EL = {86,52,33,52};
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// memory address where emulation starts
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public static final int ADDRESS = 0x10000;
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public static final long toInt(byte val[]) {
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long res = 0;
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for (int i = 0; i < val.length; i++) {
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long v = val[i] & 0xff;
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res = res + (v << (i * 8));
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}
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return res;
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}
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public static final byte[] toBytes(long val) {
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byte[] res = new byte[8];
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for (int i = 0; i < 8; i++) {
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res[i] = (byte)(val & 0xff);
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val >>>= 8;
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}
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return res;
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}
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// callback for tracing basic blocks
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private static class MyBlockHook implements BlockHook {
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public void hook(Unicorn u, long address, int size, Object user_data) {
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System.out.print(String.format(">>> Tracing basic block at 0x%x, block size = 0x%x\n", address, size));
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}
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}
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// callback for tracing instruction
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private static class MyCodeHook implements CodeHook {
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public void hook(Unicorn u, long address, int size, Object user_data) {
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System.out.print(String.format(">>> Tracing instruction at 0x%x, instruction size = 0x%x\n", address, size));
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}
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}
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static void test_mips_eb()
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{
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byte[] r1 = toBytes(0x6789); // R1 register
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System.out.print("Emulate MIPS code (big-endian)\n");
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// Initialize emulator in MIPS mode
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Unicorn u = new Unicorn(Unicorn.UC_ARCH_MIPS, Unicorn.UC_MODE_MIPS32 + Unicorn.UC_MODE_BIG_ENDIAN);
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// map 2MB memory for this emulation
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u.mem_map(ADDRESS, 2 * 1024 * 1024, Unicorn.UC_PROT_ALL);
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// write machine code to be emulated to memory
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u.mem_write(ADDRESS, MIPS_CODE_EB);
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// initialize machine registers
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u.reg_write(Unicorn.UC_MIPS_REG_1, r1);
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// tracing all basic blocks with customized callback
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u.hook_add(new MyBlockHook(), 1, 0, null);
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// tracing one instruction at ADDRESS with customized callback
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u.hook_add(new MyCodeHook(), ADDRESS, ADDRESS, null);
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// emulate machine code in infinite time (last param = 0), or when
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// finishing all the code.
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u.emu_start(ADDRESS, ADDRESS + MIPS_CODE_EB.length, 0, 0);
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// now print out some registers
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System.out.print(">>> Emulation done. Below is the CPU context\n");
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r1 = u.reg_read(Unicorn.UC_MIPS_REG_1, 4);
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System.out.print(String.format(">>> R1 = 0x%x\n", toInt(r1)));
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u.close();
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}
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static void test_mips_el()
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{
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byte[] r1 = toBytes(0x6789); // R1 register
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System.out.print("===========================\n");
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System.out.print("Emulate MIPS code (little-endian)\n");
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// Initialize emulator in MIPS mode
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Unicorn u = new Unicorn(Unicorn.UC_ARCH_MIPS, Unicorn.UC_MODE_MIPS32);
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// map 2MB memory for this emulation
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u.mem_map(ADDRESS, 2 * 1024 * 1024, Unicorn.UC_PROT_ALL);
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// write machine code to be emulated to memory
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u.mem_write(ADDRESS, MIPS_CODE_EL);
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// initialize machine registers
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u.reg_write(Unicorn.UC_MIPS_REG_1, r1);
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// tracing all basic blocks with customized callback
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u.hook_add(new MyBlockHook(), 1, 0, null);
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// tracing one instruction at ADDRESS with customized callback
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u.hook_add(new MyCodeHook(), ADDRESS, ADDRESS, null);
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// emulate machine code in infinite time (last param = 0), or when
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// finishing all the code.
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u.emu_start(ADDRESS, ADDRESS + MIPS_CODE_EL.length, 0, 0);
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// now print out some registers
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System.out.print(">>> Emulation done. Below is the CPU context\n");
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r1 = u.reg_read(Unicorn.UC_MIPS_REG_1, 4);
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System.out.print(String.format(">>> R1 = 0x%x\n", toInt(r1)));
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u.close();
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}
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public static void main(String args[])
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{
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test_mips_eb();
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test_mips_el();
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}
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}
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