unicorn/bindings/java/samples/Sample_m68k.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 Loi Anh Tuan, 2015 */

/* Sample code to demonstrate how to emulate m68k code */

import unicorn.*;

public class Sample_m68k {

    // code to be emulated
    public static final byte[] M68K_CODE = { 118, -19 }; // movq #-19, %d3

    // 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_m68k() {
        Long d0 = 0x0000L;     // d0 data register
        Long d1 = 0x0000L;     // d1 data register
        Long d2 = 0x0000L;     // d2 data register
        Long d3 = 0x0000L;     // d3 data register
        Long d4 = 0x0000L;     // d4 data register
        Long d5 = 0x0000L;     // d5 data register
        Long d6 = 0x0000L;     // d6 data register
        Long d7 = 0x0000L;     // d7 data register

        Long a0 = 0x0000L;     // a0 address register
        Long a1 = 0x0000L;     // a1 address register
        Long a2 = 0x0000L;     // a2 address register
        Long a3 = 0x0000L;     // a3 address register
        Long a4 = 0x0000L;     // a4 address register
        Long a5 = 0x0000L;     // a5 address register
        Long a6 = 0x0000L;     // a6 address register
        Long a7 = 0x0000L;     // a6 address register

        Long pc = 0x0000L;     // program counter
        Long sr = 0x0000L;     // status register

        System.out.print("Emulate M68K code\n");

        // Initialize emulator in M68K mode
        Unicorn u =
            new Unicorn(Unicorn.UC_ARCH_M68K, Unicorn.UC_MODE_BIG_ENDIAN);

        // 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, M68K_CODE);

        // initialize machine registers
        u.reg_write(Unicorn.UC_M68K_REG_D0, d0);
        u.reg_write(Unicorn.UC_M68K_REG_D1, d1);
        u.reg_write(Unicorn.UC_M68K_REG_D2, d2);
        u.reg_write(Unicorn.UC_M68K_REG_D3, d3);
        u.reg_write(Unicorn.UC_M68K_REG_D4, d4);
        u.reg_write(Unicorn.UC_M68K_REG_D5, d5);
        u.reg_write(Unicorn.UC_M68K_REG_D6, d6);
        u.reg_write(Unicorn.UC_M68K_REG_D7, d7);

        u.reg_write(Unicorn.UC_M68K_REG_A0, a0);
        u.reg_write(Unicorn.UC_M68K_REG_A1, a1);
        u.reg_write(Unicorn.UC_M68K_REG_A2, a2);
        u.reg_write(Unicorn.UC_M68K_REG_A3, a3);
        u.reg_write(Unicorn.UC_M68K_REG_A4, a4);
        u.reg_write(Unicorn.UC_M68K_REG_A5, a5);
        u.reg_write(Unicorn.UC_M68K_REG_A6, a6);
        u.reg_write(Unicorn.UC_M68K_REG_A7, a7);

        u.reg_write(Unicorn.UC_M68K_REG_PC, pc);
        u.reg_write(Unicorn.UC_M68K_REG_SR, sr);

        // tracing all basic blocks with customized callback
        u.hook_add(new MyBlockHook(), 1, 0, null);

        // tracing all instruction
        u.hook_add(new MyCodeHook(), 1, 0, null);

        // emulate machine code in infinite time (last param = 0), or when
        // finishing all the code.
        u.emu_start(ADDRESS, ADDRESS + M68K_CODE.length, 0, 0);

        // now print out some registers
        System.out.print(">>> Emulation done. Below is the CPU context\n");

        d0 = (Long) u.reg_read(Unicorn.UC_M68K_REG_D0);
        d1 = (Long) u.reg_read(Unicorn.UC_M68K_REG_D1);
        d2 = (Long) u.reg_read(Unicorn.UC_M68K_REG_D2);
        d3 = (Long) u.reg_read(Unicorn.UC_M68K_REG_D3);
        d4 = (Long) u.reg_read(Unicorn.UC_M68K_REG_D4);
        d5 = (Long) u.reg_read(Unicorn.UC_M68K_REG_D5);
        d6 = (Long) u.reg_read(Unicorn.UC_M68K_REG_D6);
        d7 = (Long) u.reg_read(Unicorn.UC_M68K_REG_D7);

        a0 = (Long) u.reg_read(Unicorn.UC_M68K_REG_A0);
        a1 = (Long) u.reg_read(Unicorn.UC_M68K_REG_A1);
        a2 = (Long) u.reg_read(Unicorn.UC_M68K_REG_A2);
        a3 = (Long) u.reg_read(Unicorn.UC_M68K_REG_A3);
        a4 = (Long) u.reg_read(Unicorn.UC_M68K_REG_A4);
        a5 = (Long) u.reg_read(Unicorn.UC_M68K_REG_A5);
        a6 = (Long) u.reg_read(Unicorn.UC_M68K_REG_A6);
        a7 = (Long) u.reg_read(Unicorn.UC_M68K_REG_A7);

        pc = (Long) u.reg_read(Unicorn.UC_M68K_REG_PC);
        sr = (Long) u.reg_read(Unicorn.UC_M68K_REG_SR);

        System.out.print(String.format(">>> A0 = 0x%x\t\t>>> D0 = 0x%x\n",
            a0.intValue(), d0.intValue()));
        System.out.print(String.format(">>> A1 = 0x%x\t\t>>> D1 = 0x%x\n",
            a1.intValue(), d1.intValue()));
        System.out.print(String.format(">>> A2 = 0x%x\t\t>>> D2 = 0x%x\n",
            a2.intValue(), d2.intValue()));
        System.out.print(String.format(">>> A3 = 0x%x\t\t>>> D3 = 0x%x\n",
            a3.intValue(), d3.intValue()));
        System.out.print(String.format(">>> A4 = 0x%x\t\t>>> D4 = 0x%x\n",
            a4.intValue(), d4.intValue()));
        System.out.print(String.format(">>> A5 = 0x%x\t\t>>> D5 = 0x%x\n",
            a5.intValue(), d5.intValue()));
        System.out.print(String.format(">>> A6 = 0x%x\t\t>>> D6 = 0x%x\n",
            a6.intValue(), d6.intValue()));
        System.out.print(String.format(">>> A7 = 0x%x\t\t>>> D7 = 0x%x\n",
            a7.intValue(), d7.intValue()));
        System.out.print(String.format(">>> PC = 0x%x\n", pc.intValue()));
        System.out.print(String.format(">>> SR = 0x%x\n", sr.intValue()));

        u.close();
    }

    public static void main(String args[]) {
        test_m68k();
    }
}