mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-16 13:41:48 -04:00
1a1cadbd5d
The static stack liveness analysis needs to know how many bytes a helper or kfunc accesses through a stack pointer argument, so it can precisely mark the affected stack slots as stack 'def' or 'use'. Add bpf_helper_stack_access_bytes() and bpf_kfunc_stack_access_bytes() which resolve the access size for a given call argument. Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20260403024422.87231-7-alexei.starovoitov@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>