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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:35:05 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 17:39:31 +0000 |
| commit | 85c675d0d09a45a135bddd15d7b385f8758c32fb (patch) | |
| tree | 76267dbc9b9a130337be3640948fe397b04ac629 /Documentation/trace/fprobetrace.rst | |
| parent | Adding upstream version 6.6.15. (diff) | |
| download | linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.tar.xz linux-85c675d0d09a45a135bddd15d7b385f8758c32fb.zip | |
Adding upstream version 6.7.7.upstream/6.7.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | Documentation/trace/fprobetrace.rst | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/Documentation/trace/fprobetrace.rst b/Documentation/trace/fprobetrace.rst index 8e9bebcf0a..e35e6b18df 100644 --- a/Documentation/trace/fprobetrace.rst +++ b/Documentation/trace/fprobetrace.rst @@ -59,8 +59,12 @@ Synopsis of fprobe-events and bitfield are supported. (\*1) This is available only when BTF is enabled. - (\*2) only for the probe on function entry (offs == 0). - (\*3) only for return probe. + (\*2) only for the probe on function entry (offs == 0). Note, this argument access + is best effort, because depending on the argument type, it may be passed on + the stack. But this only support the arguments via registers. + (\*3) only for return probe. Note that this is also best effort. Depending on the + return value type, it might be passed via a pair of registers. But this only + accesses one register. (\*4) this is useful for fetching a field of data structures. (\*5) "u" means user-space dereference. |