diff options
| author | Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2022-11-22 23:39:07 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-12-27 14:52:11 +0300 |
| commit | 03f5c0272d1b59343144e199becc911dae52c37e (patch) | |
| tree | af7be24cae0e53fb89bf858856e1c5914feeb158 /tools/testing/selftests/rseq/rseq.h | |
| parent | cbae6bac29a8c5cf2f1cb5c6bce35af00cec164b (diff) | |
| download | linux-03f5c0272d1b59343144e199becc911dae52c37e.tar.xz | |
selftests/rseq: Use ELF auxiliary vector for extensible rseq
Use the ELF auxiliary vector AT_RSEQ_FEATURE_SIZE to detect the RSEQ
features supported by the kernel.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221122203932.231377-6-mathieu.desnoyers@efficios.com
Diffstat (limited to 'tools/testing/selftests/rseq/rseq.h')
| -rw-r--r-- | tools/testing/selftests/rseq/rseq.h | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/tools/testing/selftests/rseq/rseq.h b/tools/testing/selftests/rseq/rseq.h index 6f7513384bf5..95adc1e1b0db 100644 --- a/tools/testing/selftests/rseq/rseq.h +++ b/tools/testing/selftests/rseq/rseq.h @@ -47,14 +47,24 @@ #include "rseq-thread-pointer.h" -/* Offset from the thread pointer to the rseq area. */ +/* Offset from the thread pointer to the rseq area. */ extern ptrdiff_t rseq_offset; -/* Size of the registered rseq area. 0 if the registration was - unsuccessful. */ + +/* + * Size of the registered rseq area. 0 if the registration was + * unsuccessful. + */ extern unsigned int rseq_size; -/* Flags used during rseq registration. */ + +/* Flags used during rseq registration. */ extern unsigned int rseq_flags; +/* + * rseq feature size supported by the kernel. 0 if the registration was + * unsuccessful. + */ +extern unsigned int rseq_feature_size; + static inline struct rseq_abi *rseq_get_abi(void) { return (struct rseq_abi *) ((uintptr_t) rseq_thread_pointer() + rseq_offset); |