|| Linux Programmer's Manual
NAME sigreturn - return from signal handler and cleanup stack frame
int sigreturn(unsigned long
When the Linux kernel creates the stack frame for a signal handler, a call to
() is inserted into the stack frame so that upon return from the signal handler,
() will be called.
() call undoes everything that was done—changing the process's signal mask, switching stacks (see
(2))—in order to invoke the signal handler: it restores the process's signal mask, switches stacks, and restores the process's context (registers, processor flags), so that the process directly resumes execution at the point where it was interrupted by the signal.
sigreturn() never returns.
sigreturn() is specific to Linux and should not be used in programs intended to be portable.
sigreturn() call is used by the kernel to implement signal handlers. It should
never be called directly. Better yet, the specific use of the
__unused argument varies depending on the architecture.
COLOPHON This page is part of release 3.53 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/.