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1048 lines
33 KiB
C
1048 lines
33 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\x66\x0f\xef\xc1" // INC ecx; DEC edx; PXOR xmm0, xmm1
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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_CODE32_INC "\x40" // INC eax
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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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// callback for tracing memory access (READ or WRITE)
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static bool hook_mem_invalid(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:
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// return false to indicate we want to stop emulation
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return false;
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case UC_MEM_WRITE_UNMAPPED:
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printf(">>> Missing 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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// map this memory in with 2MB in size
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uc_mem_map(uc, 0xaaaa0000, 2 * 1024*1024, UC_PROT_ALL);
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// return true to indicate we want to continue
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return true;
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}
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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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// callback for IN instruction (X86).
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// this returns the data read from the port
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static uint32_t hook_in(uc_engine *uc, uint32_t port, int size, void *user_data)
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{
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uint32_t eip;
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uc_reg_read(uc, UC_X86_REG_EIP, &eip);
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printf("--- reading from port 0x%x, size: %u, address: 0x%x\n", port, size, eip);
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switch(size) {
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default:
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return 0; // should never reach this
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case 1:
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// read 1 byte to AL
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return 0xf1;
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case 2:
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// read 2 byte to AX
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return 0xf2;
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break;
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case 4:
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// read 4 byte to EAX
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return 0xf4;
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}
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}
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// callback for OUT instruction (X86).
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static void hook_out(uc_engine *uc, uint32_t port, int size, uint32_t value, void *user_data)
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{
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uint32_t tmp = 0;
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uint32_t eip;
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uc_reg_read(uc, UC_X86_REG_EIP, &eip);
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printf("--- writing to port 0x%x, size: %u, value: 0x%x, address: 0x%x\n", port, size, value, eip);
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// confirm that value is indeed the value of AL/AX/EAX
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switch(size) {
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default:
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return; // should never reach this
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case 1:
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uc_reg_read(uc, UC_X86_REG_AL, &tmp);
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break;
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case 2:
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uc_reg_read(uc, UC_X86_REG_AX, &tmp);
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break;
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case 4:
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uc_reg_read(uc, UC_X86_REG_EAX, &tmp);
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break;
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}
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printf("--- register value = 0x%x\n", tmp);
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}
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// callback for SYSCALL instruction (X86).
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static void hook_syscall(uc_engine *uc, void *user_data)
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{
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uint64_t rax;
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uc_reg_read(uc, UC_X86_REG_RAX, &rax);
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if (rax == 0x100) {
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rax = 0x200;
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uc_reg_write(uc, UC_X86_REG_RAX, &rax);
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} else
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printf("ERROR: was not expecting rax=0x%"PRIx64 " in syscall\n", rax);
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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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// XMM0 and XMM1 registers, low qword then high qword
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uint64_t r_xmm0[2] = {0x08090a0b0c0d0e0f, 0x0001020304050607};
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uint64_t r_xmm1[2] = {0x8090a0b0c0d0e0f0, 0x0010203040506070};
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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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uc_reg_write(uc, UC_X86_REG_XMM0, &r_xmm0);
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uc_reg_write(uc, UC_X86_REG_XMM1, &r_xmm1);
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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 by having @begin > @end
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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
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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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uc_reg_read(uc, UC_X86_REG_XMM0, &r_xmm0);
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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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printf(">>> XMM0 = 0x%.16"PRIx64"%.16"PRIx64"\n", r_xmm0[1], r_xmm0[0]);
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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_i386_map_ptr(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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void *mem;
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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("===================================\n");
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printf("Emulate i386 code - use uc_mem_map_ptr()\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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// malloc 2MB memory for this emulation
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mem = calloc(1, 2 * 1024 * 1024);
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if (mem == NULL) {
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printf("Failed to malloc()\n");
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return;
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}
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uc_mem_map_ptr(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL, mem);
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// write machine code to be emulated to memory
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if (!memcpy(mem, 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, 1, 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, 1, 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_i386_jump(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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printf("===================================\n");
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printf("Emulate i386 code with jump\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_JUMP,
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sizeof(X86_CODE32_JUMP) - 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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// tracing 1 basic block with customized callback
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uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, ADDRESS, ADDRESS);
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// tracing 1 instruction at ADDRESS
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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
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err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32_JUMP) - 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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printf(">>> Emulation done. Below is the CPU context\n");
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uc_close(uc);
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}
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// emulate code that loop forever
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static void test_i386_loop(void)
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{
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uc_engine *uc;
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uc_err err;
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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("===================================\n");
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printf("Emulate i386 code that loop forever\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_LOOP, sizeof(X86_CODE32_LOOP) - 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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|
|
// emulate machine code in 2 seconds, so we can quit even
|
|
// if the code loops
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32_LOOP) - 1, 2 * UC_SECOND_SCALE, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_ECX, &r_ecx);
|
|
uc_reg_read(uc, UC_X86_REG_EDX, &r_edx);
|
|
printf(">>> ECX = 0x%x\n", r_ecx);
|
|
printf(">>> EDX = 0x%x\n", r_edx);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
// emulate code that read invalid memory
|
|
static void test_i386_invalid_mem_read(void)
|
|
{
|
|
uc_engine *uc;
|
|
uc_err err;
|
|
uc_hook trace1, trace2;
|
|
|
|
int r_ecx = 0x1234; // ECX register
|
|
int r_edx = 0x7890; // EDX register
|
|
|
|
printf("===================================\n");
|
|
printf("Emulate i386 code that read from invalid memory\n");
|
|
|
|
// Initialize emulator in X86-32bit mode
|
|
err = uc_open(UC_ARCH_X86, UC_MODE_32, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// map 2MB memory for this emulation
|
|
uc_mem_map(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
if (uc_mem_write(uc, ADDRESS, X86_CODE32_MEM_READ, sizeof(X86_CODE32_MEM_READ) - 1)) {
|
|
printf("Failed to write emulation code to memory, quit!\n");
|
|
return;
|
|
}
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_X86_REG_ECX, &r_ecx);
|
|
uc_reg_write(uc, UC_X86_REG_EDX, &r_edx);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, 1, 0);
|
|
|
|
// tracing all instruction by having @begin > @end
|
|
uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, 1, 0);
|
|
|
|
// emulate machine code in infinite time
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32_MEM_READ) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_ECX, &r_ecx);
|
|
uc_reg_read(uc, UC_X86_REG_EDX, &r_edx);
|
|
printf(">>> ECX = 0x%x\n", r_ecx);
|
|
printf(">>> EDX = 0x%x\n", r_edx);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
// emulate code that write invalid memory
|
|
static void test_i386_invalid_mem_write(void)
|
|
{
|
|
uc_engine *uc;
|
|
uc_err err;
|
|
uc_hook trace1, trace2, trace3;
|
|
uint32_t tmp;
|
|
|
|
int r_ecx = 0x1234; // ECX register
|
|
int r_edx = 0x7890; // EDX register
|
|
|
|
printf("===================================\n");
|
|
printf("Emulate i386 code that write to invalid memory\n");
|
|
|
|
// Initialize emulator in X86-32bit mode
|
|
err = uc_open(UC_ARCH_X86, UC_MODE_32, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// map 2MB memory for this emulation
|
|
uc_mem_map(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
if (uc_mem_write(uc, ADDRESS, X86_CODE32_MEM_WRITE, sizeof(X86_CODE32_MEM_WRITE) - 1)) {
|
|
printf("Failed to write emulation code to memory, quit!\n");
|
|
return;
|
|
}
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_X86_REG_ECX, &r_ecx);
|
|
uc_reg_write(uc, UC_X86_REG_EDX, &r_edx);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, 1, 0);
|
|
|
|
// tracing all instruction by having @begin > @end
|
|
uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, 1, 0);
|
|
|
|
// intercept invalid memory events
|
|
uc_hook_add(uc, &trace3, UC_HOOK_MEM_READ_UNMAPPED | UC_HOOK_MEM_WRITE_UNMAPPED, hook_mem_invalid, NULL, 1, 0);
|
|
|
|
// emulate machine code in infinite time
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32_MEM_WRITE) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_ECX, &r_ecx);
|
|
uc_reg_read(uc, UC_X86_REG_EDX, &r_edx);
|
|
printf(">>> ECX = 0x%x\n", r_ecx);
|
|
printf(">>> EDX = 0x%x\n", r_edx);
|
|
|
|
// read from memory
|
|
if (!uc_mem_read(uc, 0xaaaaaaaa, &tmp, sizeof(tmp)))
|
|
printf(">>> Read 4 bytes from [0x%x] = 0x%x\n", 0xaaaaaaaa, tmp);
|
|
else
|
|
printf(">>> Failed to read 4 bytes from [0x%x]\n", 0xaaaaaaaa);
|
|
|
|
if (!uc_mem_read(uc, 0xffffffaa, &tmp, sizeof(tmp)))
|
|
printf(">>> Read 4 bytes from [0x%x] = 0x%x\n", 0xffffffaa, tmp);
|
|
else
|
|
printf(">>> Failed to read 4 bytes from [0x%x]\n", 0xffffffaa);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
// emulate code that jump to invalid memory
|
|
static void test_i386_jump_invalid(void)
|
|
{
|
|
uc_engine *uc;
|
|
uc_err err;
|
|
uc_hook trace1, trace2;
|
|
|
|
int r_ecx = 0x1234; // ECX register
|
|
int r_edx = 0x7890; // EDX register
|
|
|
|
printf("===================================\n");
|
|
printf("Emulate i386 code that jumps to invalid memory\n");
|
|
|
|
// Initialize emulator in X86-32bit mode
|
|
err = uc_open(UC_ARCH_X86, UC_MODE_32, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// map 2MB memory for this emulation
|
|
uc_mem_map(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
if (uc_mem_write(uc, ADDRESS, X86_CODE32_JMP_INVALID, sizeof(X86_CODE32_JMP_INVALID) - 1)) {
|
|
printf("Failed to write emulation code to memory, quit!\n");
|
|
return;
|
|
}
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_X86_REG_ECX, &r_ecx);
|
|
uc_reg_write(uc, UC_X86_REG_EDX, &r_edx);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, 1, 0);
|
|
|
|
// tracing all instructions by having @begin > @end
|
|
uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, 1, 0);
|
|
|
|
// emulate machine code in infinite time
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32_JMP_INVALID) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_ECX, &r_ecx);
|
|
uc_reg_read(uc, UC_X86_REG_EDX, &r_edx);
|
|
printf(">>> ECX = 0x%x\n", r_ecx);
|
|
printf(">>> EDX = 0x%x\n", r_edx);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
static void test_i386_inout(void)
|
|
{
|
|
uc_engine *uc;
|
|
uc_err err;
|
|
uc_hook trace1, trace2, trace3, trace4;
|
|
|
|
|
|
int r_eax = 0x1234; // EAX register
|
|
int r_ecx = 0x6789; // ECX register
|
|
|
|
printf("===================================\n");
|
|
printf("Emulate i386 code with IN/OUT instructions\n");
|
|
|
|
// Initialize emulator in X86-32bit mode
|
|
err = uc_open(UC_ARCH_X86, UC_MODE_32, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// map 2MB memory for this emulation
|
|
uc_mem_map(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
if (uc_mem_write(uc, ADDRESS, X86_CODE32_INOUT, sizeof(X86_CODE32_INOUT) - 1)) {
|
|
printf("Failed to write emulation code to memory, quit!\n");
|
|
return;
|
|
}
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_X86_REG_EAX, &r_eax);
|
|
uc_reg_write(uc, UC_X86_REG_ECX, &r_ecx);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, 1, 0);
|
|
|
|
// tracing all instructions
|
|
uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, 1, 0);
|
|
|
|
// uc IN instruction
|
|
uc_hook_add(uc, &trace3, UC_HOOK_INSN, hook_in, NULL, 1, 0, UC_X86_INS_IN);
|
|
// uc OUT instruction
|
|
uc_hook_add(uc, &trace4, UC_HOOK_INSN, hook_out, NULL, 1, 0, UC_X86_INS_OUT);
|
|
|
|
// emulate machine code in infinite time
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32_INOUT) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_EAX, &r_eax);
|
|
uc_reg_read(uc, UC_X86_REG_ECX, &r_ecx);
|
|
printf(">>> EAX = 0x%x\n", r_eax);
|
|
printf(">>> ECX = 0x%x\n", r_ecx);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
// emulate code and save/restore the CPU context
|
|
static void test_i386_context_save(void)
|
|
{
|
|
uc_engine *uc;
|
|
uc_context *context;
|
|
uc_err err;
|
|
|
|
int r_eax = 0x1; // EAX register
|
|
|
|
printf("===================================\n");
|
|
printf("Save/restore CPU context in opaque blob\n");
|
|
|
|
// initialize emulator in X86-32bit mode
|
|
err = uc_open(UC_ARCH_X86, UC_MODE_32, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// map 8KB memory for this emulation
|
|
uc_mem_map(uc, ADDRESS, 8 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
if (uc_mem_write(uc, ADDRESS, X86_CODE32_INC, sizeof(X86_CODE32_INC) - 1)) {
|
|
printf("Failed to write emulation code to memory, quit!\n");
|
|
return;
|
|
}
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_X86_REG_EAX, &r_eax);
|
|
|
|
// emulate machine code in infinite time
|
|
printf(">>> Running emulation for the first time\n");
|
|
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32_INC) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_EAX, &r_eax);
|
|
printf(">>> EAX = 0x%x\n", r_eax);
|
|
|
|
// allocate and save the CPU context
|
|
printf(">>> Saving CPU context\n");
|
|
|
|
err = uc_context_alloc(uc, &context);
|
|
if (err) {
|
|
printf("Failed on uc_context_alloc() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
err = uc_context_save(uc, context);
|
|
if (err) {
|
|
printf("Failed on uc_context_save() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// emulate machine code again
|
|
printf(">>> Running emulation for the second time\n");
|
|
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32_INC) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_EAX, &r_eax);
|
|
printf(">>> EAX = 0x%x\n", r_eax);
|
|
|
|
// restore CPU context
|
|
err = uc_context_restore(uc, context);
|
|
if (err) {
|
|
printf("Failed on uc_context_restore() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> CPU context restored. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_EAX, &r_eax);
|
|
printf(">>> EAX = 0x%x\n", r_eax);
|
|
|
|
// free the CPU context
|
|
err = uc_context_free(context);
|
|
if (err) {
|
|
printf("Failed on uc_context_free() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
static void test_x86_64(void)
|
|
{
|
|
uc_engine *uc;
|
|
uc_err err;
|
|
uc_hook trace1, trace2, trace3, trace4;
|
|
|
|
int64_t rax = 0x71f3029efd49d41d;
|
|
int64_t rbx = 0xd87b45277f133ddb;
|
|
int64_t rcx = 0xab40d1ffd8afc461;
|
|
int64_t rdx = 0x919317b4a733f01;
|
|
int64_t rsi = 0x4c24e753a17ea358;
|
|
int64_t rdi = 0xe509a57d2571ce96;
|
|
int64_t r8 = 0xea5b108cc2b9ab1f;
|
|
int64_t r9 = 0x19ec097c8eb618c1;
|
|
int64_t r10 = 0xec45774f00c5f682;
|
|
int64_t r11 = 0xe17e9dbec8c074aa;
|
|
int64_t r12 = 0x80f86a8dc0f6d457;
|
|
int64_t r13 = 0x48288ca5671c5492;
|
|
int64_t r14 = 0x595f72f6e4017f6e;
|
|
int64_t r15 = 0x1efd97aea331cccc;
|
|
|
|
int64_t rsp = ADDRESS + 0x200000;
|
|
|
|
|
|
printf("Emulate x86_64 code\n");
|
|
|
|
// Initialize emulator in X86-64bit mode
|
|
err = uc_open(UC_ARCH_X86, UC_MODE_64, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// map 2MB memory for this emulation
|
|
uc_mem_map(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
if (uc_mem_write(uc, ADDRESS, X86_CODE64, sizeof(X86_CODE64) - 1)) {
|
|
printf("Failed to write emulation code to memory, quit!\n");
|
|
return;
|
|
}
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_X86_REG_RSP, &rsp);
|
|
|
|
uc_reg_write(uc, UC_X86_REG_RAX, &rax);
|
|
uc_reg_write(uc, UC_X86_REG_RBX, &rbx);
|
|
uc_reg_write(uc, UC_X86_REG_RCX, &rcx);
|
|
uc_reg_write(uc, UC_X86_REG_RDX, &rdx);
|
|
uc_reg_write(uc, UC_X86_REG_RSI, &rsi);
|
|
uc_reg_write(uc, UC_X86_REG_RDI, &rdi);
|
|
uc_reg_write(uc, UC_X86_REG_R8, &r8);
|
|
uc_reg_write(uc, UC_X86_REG_R9, &r9);
|
|
uc_reg_write(uc, UC_X86_REG_R10, &r10);
|
|
uc_reg_write(uc, UC_X86_REG_R11, &r11);
|
|
uc_reg_write(uc, UC_X86_REG_R12, &r12);
|
|
uc_reg_write(uc, UC_X86_REG_R13, &r13);
|
|
uc_reg_write(uc, UC_X86_REG_R14, &r14);
|
|
uc_reg_write(uc, UC_X86_REG_R15, &r15);
|
|
|
|
// tracing all basic blocks with customized callback
|
|
uc_hook_add(uc, &trace1, UC_HOOK_BLOCK, hook_block, NULL, 1, 0);
|
|
|
|
// tracing all instructions in the range [ADDRESS, ADDRESS+20]
|
|
uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code64, NULL, ADDRESS, ADDRESS+20);
|
|
|
|
// tracing all memory WRITE access (with @begin > @end)
|
|
uc_hook_add(uc, &trace3, UC_HOOK_MEM_WRITE, hook_mem64, NULL, 1, 0);
|
|
|
|
// tracing all memory READ access (with @begin > @end)
|
|
uc_hook_add(uc, &trace4, UC_HOOK_MEM_READ, hook_mem64, NULL, 1, 0);
|
|
|
|
// emulate machine code in infinite time (last param = 0), or when
|
|
// finishing all the code.
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE64) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_RAX, &rax);
|
|
uc_reg_read(uc, UC_X86_REG_RBX, &rbx);
|
|
uc_reg_read(uc, UC_X86_REG_RCX, &rcx);
|
|
uc_reg_read(uc, UC_X86_REG_RDX, &rdx);
|
|
uc_reg_read(uc, UC_X86_REG_RSI, &rsi);
|
|
uc_reg_read(uc, UC_X86_REG_RDI, &rdi);
|
|
uc_reg_read(uc, UC_X86_REG_R8, &r8);
|
|
uc_reg_read(uc, UC_X86_REG_R9, &r9);
|
|
uc_reg_read(uc, UC_X86_REG_R10, &r10);
|
|
uc_reg_read(uc, UC_X86_REG_R11, &r11);
|
|
uc_reg_read(uc, UC_X86_REG_R12, &r12);
|
|
uc_reg_read(uc, UC_X86_REG_R13, &r13);
|
|
uc_reg_read(uc, UC_X86_REG_R14, &r14);
|
|
uc_reg_read(uc, UC_X86_REG_R15, &r15);
|
|
|
|
printf(">>> RAX = 0x%" PRIx64 "\n", rax);
|
|
printf(">>> RBX = 0x%" PRIx64 "\n", rbx);
|
|
printf(">>> RCX = 0x%" PRIx64 "\n", rcx);
|
|
printf(">>> RDX = 0x%" PRIx64 "\n", rdx);
|
|
printf(">>> RSI = 0x%" PRIx64 "\n", rsi);
|
|
printf(">>> RDI = 0x%" PRIx64 "\n", rdi);
|
|
printf(">>> R8 = 0x%" PRIx64 "\n", r8);
|
|
printf(">>> R9 = 0x%" PRIx64 "\n", r9);
|
|
printf(">>> R10 = 0x%" PRIx64 "\n", r10);
|
|
printf(">>> R11 = 0x%" PRIx64 "\n", r11);
|
|
printf(">>> R12 = 0x%" PRIx64 "\n", r12);
|
|
printf(">>> R13 = 0x%" PRIx64 "\n", r13);
|
|
printf(">>> R14 = 0x%" PRIx64 "\n", r14);
|
|
printf(">>> R15 = 0x%" PRIx64 "\n", r15);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
static void test_x86_64_syscall(void)
|
|
{
|
|
uc_engine *uc;
|
|
uc_hook trace1;
|
|
uc_err err;
|
|
|
|
int64_t rax = 0x100;
|
|
|
|
printf("===================================\n");
|
|
printf("Emulate x86_64 code with 'syscall' instruction\n");
|
|
|
|
// Initialize emulator in X86-64bit mode
|
|
err = uc_open(UC_ARCH_X86, UC_MODE_64, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// map 2MB memory for this emulation
|
|
uc_mem_map(uc, ADDRESS, 2 * 1024 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
if (uc_mem_write(uc, ADDRESS, X86_CODE64_SYSCALL, sizeof(X86_CODE64_SYSCALL) - 1)) {
|
|
printf("Failed to write emulation code to memory, quit!\n");
|
|
return;
|
|
}
|
|
|
|
// hook interrupts for syscall
|
|
uc_hook_add(uc, &trace1, UC_HOOK_INSN, hook_syscall, NULL, 1, 0, UC_X86_INS_SYSCALL);
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_X86_REG_RAX, &rax);
|
|
|
|
// emulate machine code in infinite time (last param = 0), or when
|
|
// finishing all the code.
|
|
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE64_SYSCALL) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
uc_reg_read(uc, UC_X86_REG_RAX, &rax);
|
|
|
|
printf(">>> RAX = 0x%" PRIx64 "\n", rax);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
static void test_x86_16(void)
|
|
{
|
|
uc_engine *uc;
|
|
uc_err err;
|
|
uint8_t tmp;
|
|
|
|
int32_t eax = 7;
|
|
int32_t ebx = 5;
|
|
int32_t esi = 6;
|
|
|
|
printf("Emulate x86 16-bit code\n");
|
|
|
|
// Initialize emulator in X86-16bit mode
|
|
err = uc_open(UC_ARCH_X86, UC_MODE_16, &uc);
|
|
if (err) {
|
|
printf("Failed on uc_open() with error returned: %u\n", err);
|
|
return;
|
|
}
|
|
|
|
// map 8KB memory for this emulation
|
|
uc_mem_map(uc, 0, 8 * 1024, UC_PROT_ALL);
|
|
|
|
// write machine code to be emulated to memory
|
|
if (uc_mem_write(uc, 0, X86_CODE16, sizeof(X86_CODE16) - 1)) {
|
|
printf("Failed to write emulation code to memory, quit!\n");
|
|
return;
|
|
}
|
|
|
|
// initialize machine registers
|
|
uc_reg_write(uc, UC_X86_REG_EAX, &eax);
|
|
uc_reg_write(uc, UC_X86_REG_EBX, &ebx);
|
|
uc_reg_write(uc, UC_X86_REG_ESI, &esi);
|
|
|
|
// emulate machine code in infinite time (last param = 0), or when
|
|
// finishing all the code.
|
|
err = uc_emu_start(uc, 0, sizeof(X86_CODE16) - 1, 0, 0);
|
|
if (err) {
|
|
printf("Failed on uc_emu_start() with error returned %u: %s\n",
|
|
err, uc_strerror(err));
|
|
}
|
|
|
|
// now print out some registers
|
|
printf(">>> Emulation done. Below is the CPU context\n");
|
|
|
|
// read from memory
|
|
if (!uc_mem_read(uc, 11, &tmp, 1))
|
|
printf(">>> Read 1 bytes from [0x%x] = 0x%x\n", 11, tmp);
|
|
else
|
|
printf(">>> Failed to read 1 bytes from [0x%x]\n", 11);
|
|
|
|
uc_close(uc);
|
|
}
|
|
|
|
int main(int argc, char **argv, char **envp)
|
|
{
|
|
// dynamically load shared library
|
|
#ifdef DYNLOAD
|
|
if (!uc_dyn_load(NULL, 0)) {
|
|
printf("Error dynamically loading shared library.\n");
|
|
printf("Please check that unicorn.dll/unicorn.so is available as well as\n");
|
|
printf("any other dependent dll/so files.\n");
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
if (argc == 2) {
|
|
if (!strcmp(argv[1], "-16")) {
|
|
test_x86_16();
|
|
}
|
|
else if (!strcmp(argv[1], "-32")) {
|
|
test_i386();
|
|
test_i386_map_ptr();
|
|
test_i386_inout();
|
|
test_i386_context_save();
|
|
test_i386_jump();
|
|
test_i386_loop();
|
|
test_i386_invalid_mem_read();
|
|
test_i386_invalid_mem_write();
|
|
test_i386_jump_invalid();
|
|
}
|
|
else if (!strcmp(argv[1], "-64")) {
|
|
test_x86_64();
|
|
test_x86_64_syscall();
|
|
}
|
|
else if (!strcmp(argv[1], "-h")) {
|
|
printf("Syntax: %s <-16|-32|-64>\n", argv[0]);
|
|
}
|
|
}
|
|
else {
|
|
test_x86_16();
|
|
test_i386();
|
|
test_i386_map_ptr();
|
|
test_i386_inout();
|
|
test_i386_context_save();
|
|
test_i386_jump();
|
|
test_i386_loop();
|
|
test_i386_invalid_mem_read();
|
|
test_i386_invalid_mem_write();
|
|
test_i386_jump_invalid();
|
|
test_x86_64();
|
|
test_x86_64_syscall();
|
|
|
|
}
|
|
// dynamically free shared library
|
|
#ifdef DYNLOAD
|
|
uc_dyn_free();
|
|
#endif
|
|
|
|
return 0;
|
|
}
|