rseq: Introduce feature size and alignment ELF auxiliary vector entries

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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

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Mathieu Desnoyers 2022-11-22 15:39:04 -05:00 • committed by Peter Zijlstra

parent 4842dadfc6

commit 317c8194e6

3 changed files with 12 additions and 0 deletions

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2

include/uapi/linux/auxvec.h

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5

include/uapi/linux/rseq.h

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