On Wed, 20 Sep 2017, Andreas Schwab wrote: > On Sep 19 2017, Joseph Myers <jos...@codesourcery.com> wrote: > > > I've sent a glibc patch > > <https://sourceware.org/ml/libc-alpha/2017-09/msg00734.html>. I think the > > key questions for architecture experts now are: on each of those three > > architectures, do trampolines ever require executable stacks, and, if they > > do, how does this work at present when the kernel defaults to > > non-executable and my understanding at > > <https://sourceware.org/ml/libc-alpha/2017-09/msg00747.html> would be that > > glibc would only make thread stacks executable on those architectures, not > > the main process stacks, and GCC will never generate an explicit marker on > > those architectures to request an executable stack? > > For ia64 on linux there is EF_IA_64_LINUX_EXECUTABLE_STACK to request > executable heap and stack. But since ia64 uses function descriptors, > trampolines never need that.
Thanks. I think this adequately confirms my glibc patch is safe for ia64. The questions above remain for hppa and microblaze. -- Joseph S. Myers jos...@codesourcery.com
