The execution of every function proceeds as if it has access to its own stack space. Signed-off-by: Will Hawkins <hawkinsw@xxxxxx> --- Documentation/bpf/instruction-set.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/bpf/instruction-set.rst b/Documentation/bpf/instruction-set.rst index 751e657973f0..717259767a41 100644 --- a/Documentation/bpf/instruction-set.rst +++ b/Documentation/bpf/instruction-set.rst @@ -30,6 +30,11 @@ The eBPF calling convention is defined as: R0 - R5 are scratch registers and eBPF programs needs to spill/fill them if necessary across calls. +Every function invocation proceeds as if it has exclusive access to an +implementation-defined amount of stack space. R10 is a pointer to the byte of +memory with the highest address in that stack space. The contents +of a function invocation's stack space do not persist between invocations. + Instruction encoding ==================== -- 2.40.1
