syscalls

Documentation

Overview

Package syscalls is the interface from the application to the kernel. Traditionally, syscalls is the interface that is used by applications to request services from the kernel of a operating system. We provide a user-mode kernel that needs to handle those requests coming from unmodified applications. Therefore, we still use the term "syscalls" to denote this interface.

Note that the stubs in this package may merely provide the interface, not the actual implementation. It just makes writing syscall stubs straightforward.

Index

• func AddEpoll(t *kernel.Task, epfd int32, fd int32, flags epoll.EntryFlags, ...) error
• func CapError(name string, c linux.Capability, note string, urls []string) kernel.Syscall
• func CreateEpoll(t *kernel.Task, closeOnExec bool) (int32, error)
• func Error(name string, err error, note string, urls []string) kernel.Syscall
• func ErrorWithEvent(name string, err error, note string, urls []string) kernel.Syscall
• func PartiallySupported(name string, fn kernel.SyscallFn, note string, urls []string) kernel.Syscall
• func RemoveEpoll(t *kernel.Task, epfd int32, fd int32) error
• func Supported(name string, fn kernel.SyscallFn) kernel.Syscall
• func UpdateEpoll(t *kernel.Task, epfd int32, fd int32, flags epoll.EntryFlags, ...) error
• func WaitEpoll(t *kernel.Task, fd int32, max int, timeout int) ([]epoll.Event, error)

Functions

func AddEpoll

func AddEpoll(t *kernel.Task, epfd int32, fd int32, flags epoll.EntryFlags, mask waiter.EventMask, userData [2]int32) error

AddEpoll implements the epoll_ctl(2) linux syscall when op is EPOLL_CTL_ADD.

func CapError

func CapError(name string, c linux.Capability, note string, urls []string) kernel.Syscall

CapError gives a syscall function that checks for capability c. If the task has the capability, it returns ENOSYS, otherwise EPERM. To unprivileged tasks, it will seem like there is an implementation.

func CreateEpoll

func CreateEpoll(t *kernel.Task, closeOnExec bool) (int32, error)

CreateEpoll implements the epoll_create(2) linux syscall.

func Error

func Error(name string, err error, note string, urls []string) kernel.Syscall

Error returns a syscall handler that will always give the passed error.

func ErrorWithEvent

func ErrorWithEvent(name string, err error, note string, urls []string) kernel.Syscall

ErrorWithEvent gives a syscall function that sends an unimplemented syscall event via the event channel and returns the passed error.

func PartiallySupported

func PartiallySupported(name string, fn kernel.SyscallFn, note string, urls []string) kernel.Syscall

PartiallySupported returns a syscall that has a partial implementation.

func RemoveEpoll

func RemoveEpoll(t *kernel.Task, epfd int32, fd int32) error

RemoveEpoll implements the epoll_ctl(2) linux syscall when op is EPOLL_CTL_DEL.

func Supported

func Supported(name string, fn kernel.SyscallFn) kernel.Syscall

Supported returns a syscall that is fully supported.

func UpdateEpoll

func UpdateEpoll(t *kernel.Task, epfd int32, fd int32, flags epoll.EntryFlags, mask waiter.EventMask, userData [2]int32) error

UpdateEpoll implements the epoll_ctl(2) linux syscall when op is EPOLL_CTL_MOD.

func WaitEpoll

func WaitEpoll(t *kernel.Task, fd int32, max int, timeout int) ([]epoll.Event, error)

WaitEpoll implements the epoll_wait(2) linux syscall.