unicorn/tests/regress/00opcode_uc_crash.c
2016-08-28 01:38:37 +08:00

70 lines
1.7 KiB
C

#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <unicorn/unicorn.h>
#define X86_CODE32 "\x00" // add byte ptr ds:[eax],al
#define ADDRESS 0x1000000
static void VM_exec()
{
uc_engine *uc;
uc_err err;
uint32_t tmp;
unsigned int r_eax;
r_eax = 0x1000008;
// 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: %s\n", uc_strerror(err));
return;
}
err = uc_mem_map(uc, ADDRESS, (4 * 1024 * 1024), UC_PROT_ALL);
if(err != UC_ERR_OK)
{
printf("Failed to map memory %s\n", uc_strerror(err));
return;
}
// write machine code to be emulated to memory
err = uc_mem_write(uc, ADDRESS, X86_CODE32, sizeof(X86_CODE32) - 1);
if(err != UC_ERR_OK)
{
printf("Failed to write emulation code to memory, quit!: %s(len %zu)\n", uc_strerror(err), sizeof(X86_CODE32) - 1);
return;
}
// initialize machine registers
uc_reg_write(uc, UC_X86_REG_EAX, &r_eax);
// 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));
uc_close(uc);
return;
}
if (!uc_mem_read(uc, ADDRESS+8, &tmp, sizeof(tmp)))
printf(">>> Read 4 bytes from [0x%08X] = 0x%08X\n", ADDRESS+8, tmp); //should contain the byte '8'
else
printf(">>> Failed to read 4 bytes from [0x%08X]\n", ADDRESS+8);
uc_close(uc);
puts("No crash. Yay!");
}
int main(int argc, char *argv[])
{
VM_exec();
return 0;
}