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| author | Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2022-11-22 21:39:04 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-12-27 12:52:10 +0100 |
| commit | 317c8194e6aeb8b3b573ad139fc2a0635856498e (patch) | |
| tree | 487894b9890601c50b9a966a3708c2922ae78ba8 /include/uapi/linux/rseq.h | |
| parent | selftests/rseq: Fix: Fail thread registration when CONFIG_RSEQ=n (diff) | |
| download | linux-317c8194e6aeb8b3b573ad139fc2a0635856498e.tar.xz linux-317c8194e6aeb8b3b573ad139fc2a0635856498e.zip | |
rseq: Introduce feature size and alignment ELF auxiliary vector entries
Export the rseq feature size supported by the kernel as well as the
required allocation alignment for the rseq per-thread area to user-space
through ELF auxiliary vector entries.
This is part of the extensible rseq ABI.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221122203932.231377-3-mathieu.desnoyers@efficios.com
Diffstat (limited to '')
| -rw-r--r-- | include/uapi/linux/rseq.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/uapi/linux/rseq.h b/include/uapi/linux/rseq.h index 77ee207623a9..05d3c4cdeb40 100644 --- a/include/uapi/linux/rseq.h +++ b/include/uapi/linux/rseq.h @@ -130,6 +130,11 @@ struct rseq { * this thread. */ __u32 flags; + + /* + * Flexible array member at end of structure, after last feature field. + */ + char end[]; } __attribute__((aligned(4 * sizeof(__u64)))); #endif /* _UAPI_LINUX_RSEQ_H */ |