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 sigreturn is inserted into the
stack frame so that the the signal handler will call
sigreturn upon return. This inserted call to
sigreturn cleans up the stack so that the process can
restart from where it was interrupted by the
sigreturn never returns.
The 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.
sigreturn is specific to Linux and should not be used
in programs intended to be portable.