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? --Andy
