On 8/24/2020 5:36 PM, Andy Lutomirski wrote:
On Mon, Aug 24, 2020 at 5:30 PM Yu-cheng Yu <yu-cheng.yu@xxxxxxxxx> wrote:arch_prctl(ARCH_X86_CET_MMAP_SHSTK, u64 *args) Allocate a new shadow stack. The parameter 'args' is a pointer to a user buffer. *args = desired size *(args + 1) = MAP_32BIT or MAP_POPULATE On returning, *args is the allocated shadow stack address.This is hideous. Would this be better as a new syscall?
Could you point out why this is hideous, so that I can modify the arch_prctl?
I think this is more arch-specific. Even if it becomes a new syscall, we still need to pass the same parameters.
Yu-cheng
