102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/* Unicorn Emulator Engine */
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/* By Nguyen Anh Quynh, 2015 */
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/* Sample code to demonstrate how to emulate ARM64 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 ARM_CODE "\xab\x05\x00\xb8\xaf\x05\x40\x38" // str w11, [x13]; ldrb w15, [x13]
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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, void *user_data)
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{
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printf(">>> Tracing basic block at 0x%"PRIx64 ", block size = 0x%x\n", address, size);
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}
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static void hook_code(uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
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{
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printf(">>> Tracing instruction at 0x%"PRIx64 ", instruction size = 0x%x\n", address, size);
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}
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static void test_arm64(void)
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{
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uc_engine *uc;
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uc_err err;
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uc_hook trace1, trace2;
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int64_t x11 = 0x12345678; // X11 register
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int64_t x13 = 0x10000 + 0x8; // X13 register
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int64_t x15 = 0x33; // X15 register
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printf("Emulate ARM64 code\n");
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// Initialize emulator in ARM mode
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err = uc_open(UC_ARCH_ARM64, UC_MODE_ARM, &uc);
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if (err) {
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printf("Failed on uc_open() with error returned: %u (%s)\n",
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err, 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, ARM_CODE, sizeof(ARM_CODE) - 1);
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// initialize machine registers
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uc_reg_write(uc, UC_ARM64_REG_X11, &x11);
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uc_reg_write(uc, UC_ARM64_REG_X13, &x13);
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uc_reg_write(uc, UC_ARM64_REG_X15, &x15);
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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 one instruction at ADDRESS with customized callback
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uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, ADDRESS, ADDRESS);
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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(ARM_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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printf(">>> As little endian, X15 should be 0x78:\n");
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uc_reg_read(uc, UC_ARM64_REG_X15, &x15);
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printf(">>> X15 = 0x%" PRIx64 "\n", x15);
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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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// dynamically load shared library
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#ifdef DYNLOAD
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if (!uc_dyn_load(NULL, 0)) {
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printf("Error dynamically loading shared library.\n");
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printf("Please check that unicorn.dll/unicorn.so is available as well as\n");
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printf("any other dependent dll/so files.\n");
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printf("The easiest way is to place them in the same directory as this app.\n");
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return 1;
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}
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#endif
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test_arm64();
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// dynamically free shared library
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#ifdef DYNLOAD
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uc_dyn_free();
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#endif
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return 0;
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}
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