The motivation for having a common interface between x86 and others is: 1. Common permission checking for an LSM (future patches) 2. Common userspace
This leaves the arch_prctl interface intact, so older userspaces will continue to work. However, for item 1, when we introduce LSM hooks, they will need to reside on both the prctl and arch_prctl interfaces but will both call into the LSM with all of the same permission bits and checks. The SE Linux patches will follow these, after I address any feedback on these patches, since they can stand alone. Bill Roberts (2): x86/shstk: support via prctl selftests/x86: add generic prctl shadow stack test arch/x86/kernel/shstk.c | 35 ++++++++++++ tools/testing/selftests/x86/Makefile | 3 +- .../testing/selftests/x86/test_shadow_stack.c | 55 +++++++++++++++---- .../selftests/x86/test_shadow_stack_prctl.c | 3 + 4 files changed, 85 insertions(+), 11 deletions(-) create mode 100644 tools/testing/selftests/x86/test_shadow_stack_prctl.c -- 2.54.0
