Eric Blake <ebb9 <at> byu.net> writes: > > - sigaltstack is present and works on > > Linux, FreeBSD, NetBSD, AIX, HP-UX 11.11, IRIX, OSF/1, Solaris, and > > (more or less) MacOS X. > > It is not available on > > OpenBSD, HP-UX 11.23, Cygwin, mingw, BeOS. > > Actually, sigaltstack is in OpenBSD 4.0.
It turns out that on OpenBSD 4.0, sigaltstack exists, but ucontext_t is only a typedef for the older struct sigcontext, and is the lacking the required uc_* members, so c-stack.m4 fails to compile. But it is still possible to get the faulting address and then use mincore to see if it falls near the stack. -- Eric Blake
