11-16-2011
I know it is the kernel which makes syscalls and libc possible.
But, what makes the kernel can not call syscalls which inside itself?
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LEARN ABOUT LINUX
fdetach
UNIMPLEMENTED(2) Linux Programmer's Manual UNIMPLEMENTED(2)
NAME
afs_syscall, break, ftime, getpmsg, gtty, lock, madvise1, mpx, prof, profil, putpmsg, security, stty, tuxcall, ulimit, vserver - unimple-
mented system calls
SYNOPSIS
Unimplemented system calls.
DESCRIPTION
These system calls are not implemented in the Linux 2.6.22 kernel.
RETURN VALUE
These system calls always return -1 and set errno to ENOSYS.
NOTES
Note that ftime(3), profil(3) and ulimit(3) are implemented as library functions.
Some system calls, like alloc_hugepages(2), free_hugepages(2), ioperm(2), iopl(2), and vm86(2) only exist on certain architectures.
Some system calls, like ipc(2), create_module(2), init_module(2), and delete_module(2) only exist when the Linux kernel was built with sup-
port for them.
SEE ALSO
syscalls(2)
COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2007-07-05 UNIMPLEMENTED(2)