Messages in this thread | | | Date | Fri, 2 Dec 2022 18:43:23 -0800 | From | Kees Cook <> | Subject | Re: [PATCH v4 26/39] x86/shstk: Add user-mode shadow stack support |
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On Fri, Dec 02, 2022 at 04:35:53PM -0800, Rick Edgecombe wrote: > From: Yu-cheng Yu <yu-cheng.yu@intel.com> > > Introduce basic shadow stack enabling/disabling/allocation routines. > A task's shadow stack is allocated from memory with VM_SHADOW_STACK flag > and has a fixed size of min(RLIMIT_STACK, 4GB). > > Keep the task's shadow stack address and size in thread_struct. This will > be copied when cloning new threads, but needs to be cleared during exec, > so add a function to do this. > > Do not support IA32 emulation or x32. > > Tested-by: Pengfei Xu <pengfei.xu@intel.com> > Tested-by: John Allen <john.allen@amd.com> > Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
-- Kees Cook
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