static RTAI_SYSCALL_MODE int sys_rtdm_recvmsg(long fd, struct msghdr *msg, long flags)
{
struct msghdr krnl_msg;
struct task_struct *curr = current;
int ret;
if (unlikely(!__xn_access_ok(curr, VERIFY_WRITE, msg, sizeof(krnl_msg)))) {
return -EFAULT;
}
__xn_copy_from_user(curr, &krnl_msg, msg, sizeof(krnl_msg));
if ((ret = __rt_dev_recvmsg(curr, fd, &krnl_msg, flags)) >= 0) {
__xn_copy_to_user(curr, msg, &krnl_msg, sizeof(krnl_msg));
}
return ret;
}
static int sys_rtdm_recvmsg(struct pt_regs *regs)
{
struct task_struct *p = current;
struct msghdr krnl_msg;
int ret;
if (unlikely(!access_wok(__xn_reg_arg2(regs),
sizeof(krnl_msg)) ||
__xn_copy_from_user(&krnl_msg,
(void __user *)__xn_reg_arg2(regs),
sizeof(krnl_msg))))
return -EFAULT;
ret = __rt_dev_recvmsg(p, __xn_reg_arg1(regs), &krnl_msg,
__xn_reg_arg3(regs));
if (unlikely(ret < 0))
return ret;
if (unlikely(__xn_copy_to_user((void __user *)__xn_reg_arg2(regs),
&krnl_msg, sizeof(krnl_msg))))
return -EFAULT;
return ret;
}
