On Tue, Mar 31, 2020 at 03:04:18PM +0200, Paul FLOYD wrote: > > It is the stack grow area and the guard, combined. Read the mmap(2), in> > > particular explanation of MAP_STACK and MAP_GUARD. > I see from the mmap man page that this appeared in FreeBSD 11.1. > > Do you know where the size of the stack guard gets defined? I tried searching > on google for stuff like 'stack MAP_GUARD size' but didn't find anything.
Guard fills the rest of the stack region, so that [guard; mapped stack] fill the whole area as requested by mmap. Start of the guard is at the starting address requested from mmap (or auto-selected), end of the mapped area is at guard start + total len. I believe it is explained in the man page. > > (I need this to fix setting up the client stack on Valgrind x86, which is > currently broken) > > A+ > Paul > > _______________________________________________ > freebsd-toolchain@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-toolchain > To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org" _______________________________________________ freebsd-toolchain@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org"
