|SIGRETURN(2)||System Calls Manual||SIGRETURN(2)|
sigreturn — return
Standard C Library (libc, -lc)
system call allows users to atomically unmask, switch stacks, and return
from a signal context. The thread's signal mask and stack status are
restored from the context structure pointed to by scp.
The system call does not return; the users stack pointer, frame pointer,
argument pointer, and processor status longword are restored from the
context. Execution resumes at the specified pc. This system call is used by
the trampoline code and longjmp(3) when returning from a
signal to the previously executing program.
If successful, the system call does not return. Otherwise, a value of -1 is returned and errno is set to indicate the error.
sigreturn() system call will fail and
the thread context will remain unchanged if one of the following occurs.
sigreturn() system call appeared in
|September 6, 2013||Debian|