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add sample code for API uc_mem_map_ptr()

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Nguyen Anh Quynh 2015-11-28 16:17:52 +08:00
parent f57c098056
commit 8f1e8c0ab1
1 changed files with 71 additions and 0 deletions
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71
samples/sample_x86.c
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@ -228,6 +228,76 @@ static void test_i386(void)
uc_close(uc);
}
static void test_i386_map_ptr(void)
{
uc_engine *uc;
uc_err err;
uint32_t tmp;
uc_hook trace1, trace2;
void *mem;
int r_ecx = 0x1234; // ECX register
int r_edx = 0x7890; // EDX register
printf("===================================\n");
printf("Emulate i386 code - use uc_mem_map_ptr()\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;
}
// malloc 2MB memory for this emulation
mem = malloc(2 * 1024 * 1024);
if (mem == NULL) {
printf("Failed to malloc()\n");
return;
}
uc_mem_map_ptr(uc, ADDRESS, 2 * 1024 * 1024, mem);
// write machine code to be emulated to memory
if (!memcpy(mem, X86_CODE32, sizeof(X86_CODE32) - 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, (uint64_t)1, (uint64_t)0);
// tracing all instruction by having @begin > @end
uc_hook_add(uc, &trace2, UC_HOOK_CODE, hook_code, NULL, (uint64_t)1, (uint64_t)0);
// emulate machine code in infinite time
err = uc_emu_start(uc, ADDRESS, ADDRESS + sizeof(X86_CODE32) - 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, ADDRESS, &tmp, sizeof(tmp)))
printf(">>> Read 4 bytes from [0x%x] = 0x%x\n", ADDRESS, tmp);
else
printf(">>> Failed to read 4 bytes from [0x%x]\n", ADDRESS);
uc_close(uc);
}
static void test_i386_jump(void)
{
uc_engine *uc;
@ -795,6 +865,7 @@ int main(int argc, char **argv, char **envp)
if (argc == 2) {
if (!strcmp(argv[1], "-32")) {
test_i386();
test_i386_map_ptr();
test_i386_inout();
test_i386_jump();
test_i386_loop();