函数逻辑报告

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v5.5.9

Brick Technologies Co., Ltd

Source Code:ipc\mqueue.c Create Date:2022-07-27 18:27:22
Last Modify:2020-03-17 23:00:47 Copyright©Brick
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函数名称：COMPAT_SYSCALL_DEFINE2

函数原型：COMPAT_SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes, const struct compat_sigevent __user *, u_notification)

返回类型：

参数：无

1476  struct sigevent n, * p = NULL
1477  如果u_notification则
1478  如果We currently only need the following fields from the sigevent* structure: sigev_value, sigev_signo, sig_notify and (sometimes* sigev_notify_thread_id). The others are handled in user mode.* We also assume that copying sigev_value.sival_int is sufficient则返回:负EFAULT
1480  如果sigev_notify恒等于deliver via thread creation 则sival_ptr等于A pointer passed in from user mode. This should not* be used for syscall parameters, just declare them* as pointers because the syscall entry code will have* appropriately converted them already.
1482  p等于n
1484  返回:Notes: the case when user wants us to deregister (with NULL as pointer)* and he isn't currently owner of notification, will be silently discarded.* It isn't explicitly defined in the POSIX.