rseq: Allow registering RSEQ with slice extension

Since glibc cares about the number of syscalls required to initialize a new thread, allow initializing rseq with slice extension on. This avoids having to do another prctl().

Peter Zijlstra committed 9 months ago

Commit d6200241 parent 830969e2 files · +12 −3Browse files

Showing the changes to include/uapi (1 of 2 files). Show all

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include/uapi/linux/rseq.h+2−1

@@ -19,7 +19,8 @@ enum rseq_cpu_id_state { · 18 unmodified lines
19	19	};
20	20
21	21	enum rseq_flags {
22		− RSEQ_FLAG_UNREGISTER = (1 << 0),
	22	+ RSEQ_FLAG_UNREGISTER = (1 << 0),
	23	+ RSEQ_FLAG_SLICE_EXT_DEFAULT_ON = (1 << 1),
23	24	};
24	25
25	26	enum rseq_cs_flags_bit {