mirror of
https://github.com/yuzu-emu/unicorn
synced 2024-11-24 09:18:32 +00:00
306 lines
11 KiB
C
306 lines
11 KiB
C
/* Unicorn Emulator Engine */
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/* By Nguyen Anh Quynh & Dang Hoang Vu, 2015 */
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/* Sample code to demonstrate how to emulate X86 code */
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// windows specific
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#ifdef _MSC_VER
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#include <io.h>
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#include <windows.h>
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#define PRIx64 "llX"
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#ifdef DYNLOAD
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#include "unicorn_dynload.h"
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#else // DYNLOAD
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#include <unicorn/unicorn.h>
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#ifdef _WIN64
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#pragma comment(lib, "unicorn_staload64.lib")
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#else // _WIN64
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#pragma comment(lib, "unicorn_staload.lib")
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#endif // _WIN64
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#endif // DYNLOAD
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// posix specific
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#else // _MSC_VER
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#include <unistd.h>
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#include <inttypes.h>
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#include <unicorn/unicorn.h>
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#endif // _MSC_VER
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// common includes
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#include <string.h>
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// code to be emulated
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#define X86_CODE32 "\x41\x4a" // INC ecx; DEC edx
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#define X86_CODE32_JUMP "\xeb\x02\x90\x90\x90\x90\x90\x90" // jmp 4; nop; nop; nop; nop; nop; nop
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// #define X86_CODE32_SELF "\xeb\x1c\x5a\x89\xd6\x8b\x02\x66\x3d\xca\x7d\x75\x06\x66\x05\x03\x03\x89\x02\xfe\xc2\x3d\x41\x41\x41\x41\x75\xe9\xff\xe6\xe8\xdf\xff\xff\xff\x31\xd2\x6a\x0b\x58\x99\x52\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x52\x53\x89\xe1\xca\x7d\x41\x41\x41\x41"
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//#define X86_CODE32 "\x51\x51\x51\x51" // PUSH ecx;
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#define X86_CODE32_LOOP "\x41\x4a\xeb\xfe" // INC ecx; DEC edx; JMP self-loop
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#define X86_CODE32_MEM_WRITE "\x89\x0D\xAA\xAA\xAA\xAA\x41\x4a" // mov [0xaaaaaaaa], ecx; INC ecx; DEC edx
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#define X86_CODE32_MEM_READ "\x8B\x0D\xAA\xAA\xAA\xAA\x41\x4a" // mov ecx,[0xaaaaaaaa]; INC ecx; DEC edx
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#define X86_CODE32_JMP_INVALID "\xe9\xe9\xee\xee\xee\x41\x4a" // JMP outside; INC ecx; DEC edx
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#define X86_CODE32_INOUT "\x41\xE4\x3F\x4a\xE6\x46\x43" // INC ecx; IN AL, 0x3f; DEC edx; OUT 0x46, AL; INC ebx
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//#define X86_CODE64 "\x41\xBC\x3B\xB0\x28\x2A \x49\x0F\xC9 \x90 \x4D\x0F\xAD\xCF\x49\x87\xFD\x90\x48\x81\xD2\x8A\xCE\x77\x35\x48\xF7\xD9" // <== still crash
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//#define X86_CODE64 "\x41\xBC\x3B\xB0\x28\x2A\x49\x0F\xC9\x90\x4D\x0F\xAD\xCF\x49\x87\xFD\x90\x48\x81\xD2\x8A\xCE\x77\x35\x48\xF7\xD9"
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#define X86_CODE64 "\x41\xBC\x3B\xB0\x28\x2A\x49\x0F\xC9\x90\x4D\x0F\xAD\xCF\x49\x87\xFD\x90\x48\x81\xD2\x8A\xCE\x77\x35\x48\xF7\xD9\x4D\x29\xF4\x49\x81\xC9\xF6\x8A\xC6\x53\x4D\x87\xED\x48\x0F\xAD\xD2\x49\xF7\xD4\x48\xF7\xE1\x4D\x19\xC5\x4D\x89\xC5\x48\xF7\xD6\x41\xB8\x4F\x8D\x6B\x59\x4D\x87\xD0\x68\x6A\x1E\x09\x3C\x59"
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#define X86_CODE16 "\x00\x00" // add byte ptr [bx + si], al
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#define X86_CODE64_SYSCALL "\x0f\x05" // SYSCALL
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// memory address where emulation starts
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#define ADDRESS 0x1000000
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// callback for tracing basic blocks
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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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// callback for tracing instruction
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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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int eflags;
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printf(">>> Tracing instruction at 0x%"PRIx64 ", instruction size = 0x%x\n", address, size);
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uc_reg_read(uc, UC_X86_REG_EFLAGS, &eflags);
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printf(">>> --- EFLAGS is 0x%x\n", eflags);
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// Uncomment below code to stop the emulation using uc_emu_stop()
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// if (address == 0x1000009)
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// uc_emu_stop(uc);
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}
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// callback for tracing instruction
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static void hook_code64(uc_engine *uc, uint64_t address, uint32_t size, void *user_data)
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{
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uint64_t rip;
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uc_reg_read(uc, UC_X86_REG_RIP, &rip);
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printf(">>> Tracing instruction at 0x%"PRIx64 ", instruction size = 0x%x\n", address, size);
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printf(">>> RIP is 0x%"PRIx64 "\n", rip);
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// Uncomment below code to stop the emulation using uc_emu_stop()
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// if (address == 0x1000009)
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// uc_emu_stop(uc);
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}
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static void hook_mem64(uc_engine *uc, uc_mem_type type,
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uint64_t address, int size, int64_t value, void *user_data)
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{
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switch(type) {
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default: break;
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case UC_MEM_READ:
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printf(">>> Memory is being READ at 0x%"PRIx64 ", data size = %u\n",
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address, size);
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break;
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case UC_MEM_WRITE:
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printf(">>> Memory is being WRITE at 0x%"PRIx64 ", data size = %u, data value = 0x%"PRIx64 "\n",
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address, size, value);
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break;
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}
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}
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static void test_i386(void)
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{
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uc_engine *uc;
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uc_err err;
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uint32_t tmp;
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uc_hook trace1, trace2;
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int r_ecx = 0x1234; // ECX register
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int r_edx = 0x7890; // EDX register
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printf("Emulate i386 code\n");
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// Initialize emulator in X86-32bit mode
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err = uc_open(UC_ARCH_X86, UC_MODE_32, &uc);
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if (err) {
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printf("Failed on uc_open() with error returned: %u\n", 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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if (uc_mem_write(uc, ADDRESS, X86_CODE32, sizeof(X86_CODE32) - 1)) {
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printf("Failed to write emulation code to memory, quit!\n");
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return;
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}
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// initialize machine registers
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uc_reg_write(uc, UC_X86_REG_ECX, &r_ecx);
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uc_reg_write(uc, UC_X86_REG_EDX, &r_edx);
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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, (uint64_t)1, (uint64_t)0);
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// tracing all instruction by having @begin > @end
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uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, (uint64_t)1, (uint64_t)0);
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// emulate machine code in infinite time
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err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32) - 1, 0, 0);
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if (err) {
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printf("Failed on uc_emu_start() with error returned %u: %s\n",
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err, uc_strerror(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_X86_REG_ECX, &r_ecx);
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uc_reg_read(uc, UC_X86_REG_EDX, &r_edx);
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printf(">>> ECX = 0x%x\n", r_ecx);
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printf(">>> EDX = 0x%x\n", r_edx);
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// read from memory
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if (!uc_mem_read(uc, ADDRESS, &tmp, sizeof(tmp)))
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printf(">>> Read 4 bytes from [0x%x] = 0x%x\n", ADDRESS, tmp);
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else
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printf(">>> Failed to read 4 bytes from [0x%x]\n", ADDRESS);
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uc_close(uc);
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}
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static void test_x86_64(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, trace3, trace4;
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int64_t rax = 0x71f3029efd49d41d;
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int64_t rbx = 0xd87b45277f133ddb;
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int64_t rcx = 0xab40d1ffd8afc461;
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int64_t rdx = 0x919317b4a733f01;
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int64_t rsi = 0x4c24e753a17ea358;
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int64_t rdi = 0xe509a57d2571ce96;
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int64_t r8 = 0xea5b108cc2b9ab1f;
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int64_t r9 = 0x19ec097c8eb618c1;
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int64_t r10 = 0xec45774f00c5f682;
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int64_t r11 = 0xe17e9dbec8c074aa;
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int64_t r12 = 0x80f86a8dc0f6d457;
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int64_t r13 = 0x48288ca5671c5492;
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int64_t r14 = 0x595f72f6e4017f6e;
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int64_t r15 = 0x1efd97aea331cccc;
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int64_t rsp = ADDRESS + 0x200000;
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printf("Emulate x86_64 code\n");
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// Initialize emulator in X86-64bit mode
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err = uc_open(UC_ARCH_X86, UC_MODE_64, &uc);
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if (err) {
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printf("Failed on uc_open() with error returned: %u\n", 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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if (uc_mem_write(uc, ADDRESS, X86_CODE64, sizeof(X86_CODE64) - 1)) {
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printf("Failed to write emulation code to memory, quit!\n");
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return;
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}
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// initialize machine registers
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uc_reg_write(uc, UC_X86_REG_RSP, &rsp);
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uc_reg_write(uc, UC_X86_REG_RAX, &rax);
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uc_reg_write(uc, UC_X86_REG_RBX, &rbx);
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uc_reg_write(uc, UC_X86_REG_RCX, &rcx);
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uc_reg_write(uc, UC_X86_REG_RDX, &rdx);
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uc_reg_write(uc, UC_X86_REG_RSI, &rsi);
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uc_reg_write(uc, UC_X86_REG_RDI, &rdi);
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uc_reg_write(uc, UC_X86_REG_R8, &r8);
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uc_reg_write(uc, UC_X86_REG_R9, &r9);
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uc_reg_write(uc, UC_X86_REG_R10, &r10);
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uc_reg_write(uc, UC_X86_REG_R11, &r11);
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uc_reg_write(uc, UC_X86_REG_R12, &r12);
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uc_reg_write(uc, UC_X86_REG_R13, &r13);
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uc_reg_write(uc, UC_X86_REG_R14, &r14);
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uc_reg_write(uc, UC_X86_REG_R15, &r15);
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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, (uint64_t)1, (uint64_t)0);
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// tracing all instructions in the range [ADDRESS, ADDRESS+20]
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uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code64, NULL, (uint64_t)ADDRESS, (uint64_t)(ADDRESS+20));
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// tracing all memory WRITE access (with @begin > @end)
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uc_hook_add(uc, &trace3, UC_HOOK_MEM_WRITE, hook_mem64, NULL, (uint64_t)1, (uint64_t)0);
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// tracing all memory READ access (with @begin > @end)
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uc_hook_add(uc, &trace4, UC_HOOK_MEM_READ, hook_mem64, NULL, (uint64_t)1, (uint64_t)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(X86_CODE64) - 1, 0, 0);
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if (err) {
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printf("Failed on uc_emu_start() with error returned %u: %s\n",
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err, uc_strerror(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_X86_REG_RAX, &rax);
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uc_reg_read(uc, UC_X86_REG_RBX, &rbx);
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uc_reg_read(uc, UC_X86_REG_RCX, &rcx);
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uc_reg_read(uc, UC_X86_REG_RDX, &rdx);
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uc_reg_read(uc, UC_X86_REG_RSI, &rsi);
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uc_reg_read(uc, UC_X86_REG_RDI, &rdi);
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uc_reg_read(uc, UC_X86_REG_R8, &r8);
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uc_reg_read(uc, UC_X86_REG_R9, &r9);
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uc_reg_read(uc, UC_X86_REG_R10, &r10);
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uc_reg_read(uc, UC_X86_REG_R11, &r11);
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uc_reg_read(uc, UC_X86_REG_R12, &r12);
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uc_reg_read(uc, UC_X86_REG_R13, &r13);
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uc_reg_read(uc, UC_X86_REG_R14, &r14);
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uc_reg_read(uc, UC_X86_REG_R15, &r15);
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printf(">>> RAX = 0x%" PRIx64 "\n", rax);
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printf(">>> RBX = 0x%" PRIx64 "\n", rbx);
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printf(">>> RCX = 0x%" PRIx64 "\n", rcx);
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printf(">>> RDX = 0x%" PRIx64 "\n", rdx);
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printf(">>> RSI = 0x%" PRIx64 "\n", rsi);
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printf(">>> RDI = 0x%" PRIx64 "\n", rdi);
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printf(">>> R8 = 0x%" PRIx64 "\n", r8);
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printf(">>> R9 = 0x%" PRIx64 "\n", r9);
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printf(">>> R10 = 0x%" PRIx64 "\n", r10);
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printf(">>> R11 = 0x%" PRIx64 "\n", r11);
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printf(">>> R12 = 0x%" PRIx64 "\n", r12);
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printf(">>> R13 = 0x%" PRIx64 "\n", r13);
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printf(">>> R14 = 0x%" PRIx64 "\n", r14);
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printf(">>> R15 = 0x%" PRIx64 "\n", r15);
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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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while(1) {
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test_i386();
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test_x86_64();
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}
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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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