152 lines
4.8 KiB
C
152 lines
4.8 KiB
C
/* Unicorn Emulator Engine */
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/* By Loi Anh Tuan, 2015 */
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/* Sample code to demonstrate how to emulate m68k code */
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#include <unicorn/unicorn.h>
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#include <string.h>
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// code to be emulated
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#define M68K_CODE "\x76\xed" // movq #-19, %d3
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// memory address where emulation starts
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#define ADDRESS 0x10000
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static void hook_block(uc_engine *uc, uint64_t address, uint32_t size,
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void *user_data)
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{
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printf(">>> Tracing basic block at 0x%" PRIx64 ", block size = 0x%x\n",
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address, size);
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}
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static void hook_code(uc_engine *uc, uint64_t address, uint32_t size,
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void *user_data)
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{
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printf(">>> Tracing instruction at 0x%" PRIx64
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", instruction size = 0x%x\n",
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address, size);
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}
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static void test_m68k(void)
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{
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uc_engine *uc;
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uc_hook trace1, trace2;
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uc_err err;
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int d0 = 0x0000; // d0 data register
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int d1 = 0x0000; // d1 data register
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int d2 = 0x0000; // d2 data register
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int d3 = 0x0000; // d3 data register
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int d4 = 0x0000; // d4 data register
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int d5 = 0x0000; // d5 data register
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int d6 = 0x0000; // d6 data register
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int d7 = 0x0000; // d7 data register
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int a0 = 0x0000; // a0 address register
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int a1 = 0x0000; // a1 address register
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int a2 = 0x0000; // a2 address register
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int a3 = 0x0000; // a3 address register
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int a4 = 0x0000; // a4 address register
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int a5 = 0x0000; // a5 address register
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int a6 = 0x0000; // a6 address register
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int a7 = 0x0000; // a6 address register
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int pc = 0x0000; // program counter
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int sr = 0x0000; // status register
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printf("Emulate M68K code\n");
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// Initialize emulator in M68K mode
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err = uc_open(UC_ARCH_M68K, UC_MODE_BIG_ENDIAN, &uc);
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if (err) {
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printf("Failed on uc_open() with error returned: %u (%s)\n", err,
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uc_strerror(err));
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return;
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}
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// map 2MB memory for this emulation
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uc_mem_map(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
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// write machine code to be emulated to memory
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uc_mem_write(uc, ADDRESS, M68K_CODE, sizeof(M68K_CODE) - 1);
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// initialize machine registers
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uc_reg_write(uc, UC_M68K_REG_D0, &d0);
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uc_reg_write(uc, UC_M68K_REG_D1, &d1);
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uc_reg_write(uc, UC_M68K_REG_D2, &d2);
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uc_reg_write(uc, UC_M68K_REG_D3, &d3);
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uc_reg_write(uc, UC_M68K_REG_D4, &d4);
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uc_reg_write(uc, UC_M68K_REG_D5, &d5);
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uc_reg_write(uc, UC_M68K_REG_D6, &d6);
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uc_reg_write(uc, UC_M68K_REG_D7, &d7);
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uc_reg_write(uc, UC_M68K_REG_A0, &a0);
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uc_reg_write(uc, UC_M68K_REG_A1, &a1);
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uc_reg_write(uc, UC_M68K_REG_A2, &a2);
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uc_reg_write(uc, UC_M68K_REG_A3, &a3);
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uc_reg_write(uc, UC_M68K_REG_A4, &a4);
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uc_reg_write(uc, UC_M68K_REG_A5, &a5);
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uc_reg_write(uc, UC_M68K_REG_A6, &a6);
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uc_reg_write(uc, UC_M68K_REG_A7, &a7);
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uc_reg_write(uc, UC_M68K_REG_PC, &pc);
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uc_reg_write(uc, UC_M68K_REG_SR, &sr);
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// tracing all basic blocks with customized callback
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uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, 1, 0);
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// tracing all instruction
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uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, 1, 0);
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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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err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(M68K_CODE) - 1, 0, 0);
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if (err) {
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printf("Failed on uc_emu_start() with error returned: %u\n", err);
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}
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// now print out some registers
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printf(">>> Emulation done. Below is the CPU context\n");
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uc_reg_read(uc, UC_M68K_REG_D0, &d0);
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uc_reg_read(uc, UC_M68K_REG_D1, &d1);
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uc_reg_read(uc, UC_M68K_REG_D2, &d2);
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uc_reg_read(uc, UC_M68K_REG_D3, &d3);
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uc_reg_read(uc, UC_M68K_REG_D4, &d4);
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uc_reg_read(uc, UC_M68K_REG_D5, &d5);
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uc_reg_read(uc, UC_M68K_REG_D6, &d6);
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uc_reg_read(uc, UC_M68K_REG_D7, &d7);
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uc_reg_read(uc, UC_M68K_REG_A0, &a0);
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uc_reg_read(uc, UC_M68K_REG_A1, &a1);
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uc_reg_read(uc, UC_M68K_REG_A2, &a2);
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uc_reg_read(uc, UC_M68K_REG_A3, &a3);
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uc_reg_read(uc, UC_M68K_REG_A4, &a4);
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uc_reg_read(uc, UC_M68K_REG_A5, &a5);
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uc_reg_read(uc, UC_M68K_REG_A6, &a6);
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uc_reg_read(uc, UC_M68K_REG_A7, &a7);
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uc_reg_read(uc, UC_M68K_REG_PC, &pc);
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uc_reg_read(uc, UC_M68K_REG_SR, &sr);
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printf(">>> A0 = 0x%x\t\t>>> D0 = 0x%x\n", a0, d0);
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printf(">>> A1 = 0x%x\t\t>>> D1 = 0x%x\n", a1, d1);
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printf(">>> A2 = 0x%x\t\t>>> D2 = 0x%x\n", a2, d2);
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printf(">>> A3 = 0x%x\t\t>>> D3 = 0x%x\n", a3, d3);
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printf(">>> A4 = 0x%x\t\t>>> D4 = 0x%x\n", a4, d4);
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printf(">>> A5 = 0x%x\t\t>>> D5 = 0x%x\n", a5, d5);
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printf(">>> A6 = 0x%x\t\t>>> D6 = 0x%x\n", a6, d6);
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printf(">>> A7 = 0x%x\t\t>>> D7 = 0x%x\n", a7, d7);
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printf(">>> PC = 0x%x\n", pc);
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printf(">>> SR = 0x%x\n", sr);
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uc_close(uc);
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}
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int main(int argc, char **argv, char **envp)
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{
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test_m68k();
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return 0;
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}
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