HP-UX Reference (11i v2 03/08) - 2 System Calls (vol 5)

s
sigspace(2) sigspace(2)
LWP (Lightweight Processes) Considerations
Each LWP may define an alternate signal handling stack.
AUTHOR
sigspace() was developed by HP.
SEE ALSO
sigaction(2), sigstack(2), sigvector(2), malloc(3C), setjmp(3C).
Section 2−−388 Hewlett-Packard Company − 2 − HP-UX 11i Version 2: August 2003