On Tue, Oct 08, 2024 at 03:36:42PM -0700, Deepak Gupta wrote: > Equivalent to landing pad (zicfilp) on x86 is `ENDBRANCH` instruction in Intel > CET [3] and branch target identification (BTI) [4] on arm. > Similarly x86's Intel CET has shadow stack [5] and arm64 has guarded control > stack (GCS) [6] which are very similar to risc-v's zicfiss shadow stack.
> x86 already supports shadow stack for user mode and arm64 support for GCS in > usermode [7] is ongoing. FWIW the arm64 support is now in -next, including these: > Mark Brown (2): > mm: Introduce ARCH_HAS_USER_SHADOW_STACK > prctl: arch-agnostic prctl for shadow stack shared changes to generic code.
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