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Diffstat (limited to 'Documentation/bpf/standardization/abi.rst')
| -rw-r--r-- | Documentation/bpf/standardization/abi.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/bpf/standardization/abi.rst b/Documentation/bpf/standardization/abi.rst index 0c2e10eeb89a..41514137cb7b 100644 --- a/Documentation/bpf/standardization/abi.rst +++ b/Documentation/bpf/standardization/abi.rst @@ -23,3 +23,6 @@ The BPF calling convention is defined as: R0 - R5 are scratch registers and BPF programs needs to spill/fill them if necessary across calls. + +The BPF program needs to store the return value into register R0 before doing an +``EXIT``. |