函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\file.c Create Date:2022-07-29 10:38:47
Last Modify:2020-03-12 14:18:49 Copyright©Brick
首页 函数Tree
注解内核,赢得工具下载SCCTEnglish

函数名称：SYSCALL_DEFINE2

函数原型：SYSCALL_DEFINE2(dup2, unsigned int, oldfd, unsigned int, newfd)

返回类型：

参数：无

950  如果此条件成立可能性小(为编译器优化)(newfd == oldfd)则
951  files等于files
952  retval等于oldfd
954  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
955  如果非fcheck_files(files, oldfd)则retval等于负EBADF
957  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
958  返回:retval
960  返回:ksys_dup3(oldfd, newfd, 0)