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Always enable memory barriers in userspace, otherwise libpthread won't

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work correctly on MP systems.
This commit is contained in:
ad 2008-02-12 18:40:28 +00:00
parent b86eac67c4
commit 2d0314d313
1 changed files with 27 additions and 12 deletions
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39
common/lib/libc/arch/alpha/atomic/membar_ops.S
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@ -1,4 +1,4 @@
/* $NetBSD: membar_ops.S,v 1.3 2008/02/12 07:35:04 matt Exp $ */
/* $NetBSD: membar_ops.S,v 1.4 2008/02/12 18:40:28 ad Exp $ */
/*-
* Copyright (c) 2006, 2007 The NetBSD Foundation, Inc.
@ -40,6 +40,8 @@
.text
#ifdef _KERNEL
/*
* We start out with no-op versions that do nothing. We hot-patch when
* we detect a MP system.
@ -49,22 +51,12 @@ LEAF_NOPROFILE(_membar_producer, 0)
nop
END(_membar_producer)
EXPORT(_membar_producer_end)
ATOMIC_OP_ALIAS(membar_producer,_membar_producer)
LEAF_NOPROFILE(_membar_sync, 0)
RET
nop
END(_membar_sync)
EXPORT(_membar_sync_end)
ATOMIC_OP_ALIAS(membar_sync,_membar_sync)
ATOMIC_OP_ALIAS(membar_enter,_membar_sync)
STRONG_ALIAS(_membar_enter,_membar_sync)
ATOMIC_OP_ALIAS(membar_exit,_membar_sync)
STRONG_ALIAS(_membar_exit,_membar_sync)
ATOMIC_OP_ALIAS(membar_consumer,_membar_sync)
STRONG_ALIAS(_membar_consumer,_membar_sync)
#ifdef _KERNEL
LEAF_NOPROFILE(_membar_producer_mp, 0)
wmb
@ -78,4 +70,27 @@ LEAF_NOPROFILE(_membar_sync_mp, 0)
END(_membar_sync_mp)
EXPORT(_membar_sync_mp_end)
#endif /* _KERNEL */
#else /* _KERNEL */
LEAF_NOPROFILE(_membar_producer, 0)
mb
RET
END(_membar_producer)
EXPORT(_membar_producer_end)
LEAF_NOPROFILE(_membar_sync, 0)
mb
RET
END(_membar_sync)
EXPORT(_membar_sync_end)
#endif /* _KERNEL */
ATOMIC_OP_ALIAS(membar_producer,_membar_producer)
ATOMIC_OP_ALIAS(membar_sync,_membar_sync)
ATOMIC_OP_ALIAS(membar_enter,_membar_sync)
STRONG_ALIAS(_membar_enter,_membar_sync)
ATOMIC_OP_ALIAS(membar_exit,_membar_sync)
STRONG_ALIAS(_membar_exit,_membar_sync)
ATOMIC_OP_ALIAS(membar_consumer,_membar_sync)
STRONG_ALIAS(_membar_consumer,_membar_sync)