From: Dave Thaler <dthaler@xxxxxxxxxxxxx> Signed-off-by: Dave Thaler <dthaler@xxxxxxxxxxxxx> --- Documentation/bpf/linux-notes.rst | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/bpf/linux-notes.rst b/Documentation/bpf/linux-notes.rst index 522ebe27d..0581ba326 100644 --- a/Documentation/bpf/linux-notes.rst +++ b/Documentation/bpf/linux-notes.rst @@ -7,6 +7,12 @@ Linux implementation notes This document provides more details specific to the Linux kernel implementation of the eBPF instruction set. +Registers and calling convention +================================ + +All program types only use R1 which contains the "context", which is typically a structure containing all +the inputs needed, and the exit value for eBPF programs is passed as a 32 bit value. + Arithmetic instructions ======================= -- 2.33.4
