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This is done in preparation for the selftest uplift to become compatible with glibc-2.35. glibc-2.35 exposes the rseq per-thread data in the TCB, accessible at an offset from the thread pointer. The toolchains do not implement accessing the thread pointer on all architectures. Provide thread pointer getters for ppc and x86 which lack (or lacked until recently) toolchain support. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20220124171253.22072-7-mathieu.desnoyers@efficios.com
26 lines
447 B
C
26 lines
447 B
C
/* SPDX-License-Identifier: LGPL-2.1-only OR MIT */
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/*
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* rseq-generic-thread-pointer.h
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*
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* (C) Copyright 2021 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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*/
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#ifndef _RSEQ_GENERIC_THREAD_POINTER
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#define _RSEQ_GENERIC_THREAD_POINTER
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Use gcc builtin thread pointer. */
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static inline void *rseq_thread_pointer(void)
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{
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return __builtin_thread_pointer();
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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