cgchelper.py 文件源码

def revise_syscall(rename=False):
        if not rename:
            print('Change the function name with `CGCHeler.revise_syscall(True)`.')

        # visit all instructions
        start_ea, end_ea = utils.get_seg_range('.text')
        eax = -1
        ip = start_ea
        while ip < end_ea and ip != idaapi.BADADDR:
            if 'int' in idc.GetMnem(ip) and '80h' == idc.GetOpnd(ip, 0):
                if eax != -1:
                    # fix comment and function name
                    print('{}: {}'.format(hex(ip), syscall_table[eax]))
                    idc.MakeComm(ip, 'CGC syscall: {}'.format(syscall_table[eax]))
                    if rename:
                        print('Change {} to {}'.format(idc.GetFunctionName(ip), syscall_table[eax]))
                        idc.MakeName(idc.GetFunctionAttr(ip, idc.FUNCATTR_START), syscall_table[eax])
            elif 'mov' in idc.GetMnem(ip) and 'eax' == idc.GetOpnd(ip, 0) and 5 == idc.GetOpType(ip, 1):
                value = idc.GetOpnd(ip, 1)
                if re.search('^[0-9]+$', value) != None:
                    eax = int(value)
                if eax > 7 or eax < 1:
                    eax = -1

            ip = idc.NextHead(ip)