/*

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 Sparc code */

package samples;

import unicorn.*;

public class Sample_sparc {

    // code to be emulated
    public static final byte[] SPARC_CODE = { -122, 0, 64, 2 };
    //public static final byte[] SPARC_CODE = {-69,112,0,0}; //illegal code

    // 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));
        }
    }

    public static void test_sparc() {
        long g1 = 0x1230L;     // G1 register
        long g2 = 0x6789L;     // G2 register
        long g3 = 0x5555L;     // G3 register

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

        // Initialize emulator in Sparc mode
        Unicorn u = new Unicorn(Unicorn.UC_ARCH_SPARC,
            Unicorn.UC_MODE_32 + 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, SPARC_CODE);

        // initialize machine registers
        u.reg_write(Unicorn.UC_SPARC_REG_G1, g1);
        u.reg_write(Unicorn.UC_SPARC_REG_G2, g2);
        u.reg_write(Unicorn.UC_SPARC_REG_G3, g3);

        // 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 + SPARC_CODE.length, 0, 0);

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

        g3 = u.reg_read(Unicorn.UC_SPARC_REG_G3);
        System.out.print(String.format(">>> G3 = 0x%x\n", g3));

        u.close();
    }

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