请叫这段程序

littlefrog_nuaa

static void patch_jump(char *code_to_patch,char *target)
{
        int distance;
        distance = (int)target - ((int)code_to_patch +5) ;
        *code_to_patch++= 0xe9; /* jump */
        *code_to_patch++ = ((char *)&distance)[0];
        *code_to_patch++ = ((char *)&distance)[1];
        *code_to_patch++ = ((char *)&distance)[2];
        *code_to_patch = ((char *)&distance)[3];

}
这段程序的结果是什么啊？看不明白：（

xiaolongyuan

把从code_to_patch 开始的地址写上一个跳转指令.
跳转到 target 地址执行.

linuxahah

*code_to_patch++ = ((char *)&distance)[0];
*code_to_patch++ = ((char *)&distance)[1];
*code_to_patch++ = ((char *)&distance)[2];
*code_to_patch = ((char *)&distance)[3];

难道1int=4Byte ??