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| author | Paul Chaignon <paul.chaignon@gmail.com> | 2023-11-07 21:11:31 +0100 |
|---|---|---|
| committer | Aleksandr Nogikh <nogikh@google.com> | 2023-11-09 18:26:45 +0000 |
| commit | eb146eaf8a525cbaaf511a013d0dbb70bb1207b9 (patch) | |
| tree | 55015bdf9bdfa59baca350b80a29176d68151784 /sys/linux/test | |
| parent | ec3b566eb26bbe8fa4cf8a9f8625712a21286bf7 (diff) | |
sys/linux: describe BPF helper bpf_ringbuf_output
This helper has the prototype:
bpf_ringbuf_output(void *ringbuf, void *data, u64 size, u64 flags)
We need to prepare the second argument (R2) on the stack. We use an
8 bytes data value initialized to some random value on the stack and
pointed to by R2. The third argument therefore needs to be 8 (for 8
bytes).
Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
Diffstat (limited to 'sys/linux/test')
| -rw-r--r-- | sys/linux/test/bpf_helpers | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/linux/test/bpf_helpers b/sys/linux/test/bpf_helpers index b8472113f..d45a468e3 100644 --- a/sys/linux/test/bpf_helpers +++ b/sys/linux/test/bpf_helpers @@ -30,3 +30,7 @@ r2 = bpf$PROG_LOAD(AUTO, &AUTO={0x3, AUTO, &AUTO=@ringbuf={{AUTO, AUTO, AUTO, AU # Prepare, load, and execute a BPF program that calls bpf_ringbuf_query r3 = bpf$PROG_LOAD(AUTO, &AUTO={0x3, AUTO, &AUTO=@framed={{AUTO, AUTO, AUTO, AUTO, 0x0, AUTO, AUTO, AUTO, 0x0}, [@ringbuf_query={{AUTO, AUTO, AUTO, AUTO, r1, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO}}], {AUTO, AUTO, AUTO, AUTO}}, &AUTO='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, "00000000000000000000000000000000", 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0xa0) + +# Load, and execute a BPF program that calls bpf_ringbuf_output + +r3 = bpf$PROG_LOAD(AUTO, &AUTO={0x3, AUTO, &AUTO=@framed={{AUTO, AUTO, AUTO, AUTO, 0x0, AUTO, AUTO, AUTO, 0x0}, [@ringbuf_output={{AUTO, AUTO, AUTO, AUTO, r1, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, 0x1234}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO, AUTO, AUTO, AUTO}, {AUTO, AUTO, AUTO, AUTO}}], {AUTO, AUTO, AUTO, AUTO}}, &AUTO='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, "00000000000000000000000000000000", 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0xa0) |