On Fri, 2007-07-06 at 10:42 -0400, David Woodhouse wrote: > On Thu, 2007-07-05 at 16:55 -0500, Scott Wood wrote: > > To maintain compatibility with these versions, we could change the test > > in do_page_fault() to include VM_READ as well as VM_EXEC on targets that > > don't have a separate exec-bit in hardware (are there any powerpc mmus > > that do?). > > 64-bit implementations since POWER4 have separate exec permissions, > don't they? So any userspace which tries to execute non-executable pages > is already broken when running on a ppc64 machine; I wouldn't worry too > much about letting it break on ppc32 too. > > We already use vDSO signal trampolines even on the 32-bit kernel, right?
The problem was with old glibc 32 bits which used to jump to an instruction in the .got iirc that wasn't in an executable section Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
