wireguard-openbsd/lib/libpthread/man/pthread_attr_setstack.3, branch jd/queueboosts WireGuard implementation for the OpenBSD kernel https://git.zx2c4.com/wireguard-openbsd/atom/lib/libpthread/man/pthread_attr_setstack.3?h=jd%2Fqueueboosts 2018-04-12T17:13:34Z Implement MAP_STACK option for mmap(). Synchronous faults (pagefault and 2018-04-12T17:13:34Z deraadt deraadt@openbsd.org 2018-04-12T17:13:34Z urn:sha1:003f5e42bbc90263e30dbce6eb150fc5e31b56eb syscall) confirm the stack register points at MAP_STACK memory, otherwise SIGSEGV is delivered. sigaltstack() and pthread_attr_setstack() are modified to create a MAP_STACK sub-region which satisfies alignment requirements. Observe that MAP_STACK can only be set/cleared by mmap(), which zeroes the contents of the region -- there is no mprotect() equivalent operation, so there is no MAP_STACK-adding gadget. This opportunistic software-emulation of a stack protection bit makes stack-pivot operations during ROPchain fragile (kind of like removing a tool from the toolbox). original discussion with tedu, uvm work by stefan, testing by mortimer ok kettenis use fancy .In macro for includes. from Jan Klemkow. ok jmc schwarze 2013-06-05T03:40:26Z tedu tedu@openbsd.org 2013-06-05T03:40:26Z urn:sha1:86f9d4cdda0e0267dccd8755ac0035525579c4a7 Add pthread_attr_[sg]etguardsize() to match rthread, including manpages 2008-12-18T09:30:32Z guenther guenther@openbsd.org 2008-12-18T09:30:32Z urn:sha1:91063d07156452ee17c2de7976871bc6f138c85a Bump lib minor ok otto@ kurt@ marc@; doc review by jmc@ - correct .Dt for pthread_attr_setstack.3 2008-07-05T10:43:07Z jmc jmc@openbsd.org 2008-07-05T10:43:07Z urn:sha1:30fcf885d6b3957514be11856c7b0e009fe7ad7a - new sentence, new line Add manpage for pthread_attr_[sg]etstack(3) 2008-07-05T08:03:57Z guenther guenther@openbsd.org 2008-07-05T08:03:57Z urn:sha1:11ddadc0fe5e5612f4e632d77c9b84e8b35dba4d Correct misnaming in STANDARDS section ok brad@ otto@