FreeBSD Manual Pages
SIGRETURN(2) Linux Programmer's Manual SIGRETURN(2) NAME sigreturn - return from signal handler and cleanup stack frame SYNOPSIS int sigreturn(unsigned long __unused); DESCRIPTION When the Linux kernel creates the stack frame for a signal handler, a call to sigreturn() is inserted into the stack frame so that upon re- turn from the signal handler, sigreturn() will be called. This sigreturn() call undoes everything that was done--changing the process's signal mask, switching stacks (see sigaltstack(2))--in order to invoke the signal handler: it restores the process's signal mask, switches stacks, and restores the process's context (registers, proces- sor flags), so that the process directly resumes execution at the point where it was interrupted by the signal. RETURN VALUE sigreturn() never returns. FILES /usr/src/linux/arch/i386/kernel/signal.c /usr/src/linux/arch/alpha/kernel/entry.S CONFORMING TO sigreturn() is specific to Linux and should not be used in programs in- tended to be portable. NOTES The sigreturn() call is used by the kernel to implement signal han- dlers. It should never be called directly. Better yet, the specific use of the __unused argument varies depending on the architecture. SEE ALSO kill(2), restart_syscall(2), sigaltstack(2), signal(2), signal(7) COLOPHON This page is part of release 3.74 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/. Linux 2013-07-30 SIGRETURN(2)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | FILES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON
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