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0d1bafdcb6
Older versions of the Linux kernel headers obviously lack support for memory tagging, but we still want to be able to build in support when using those (obviously it can't be enabled on such systems). The linux kernel extensions are made to the platform-independent header (linux/prctl.h), so this patch takes a similar approach.
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _SYS_PRCTL_H
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#define _SYS_PRCTL_H 1
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#include <features.h>
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#include <linux/prctl.h> /* The magic values come from here */
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/* Recent extensions to linux which may post-date the kernel headers
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we're picking up... */
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/* Memory tagging control operations (for AArch64). */
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#ifndef PR_TAGGED_ADDR_ENABLE
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# define PR_TAGGED_ADDR_ENABLE (1UL << 8)
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#endif
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#ifndef PR_MTE_TCF_SHIFT
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# define PR_MTE_TCF_SHIFT 1
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# define PR_MTE_TCF_NONE (0UL << PR_MTE_TCF_SHIFT)
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# define PR_MTE_TCF_SYNC (1UL << PR_MTE_TCF_SHIFT)
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# define PR_MTE_TCF_ASYNC (2UL << PR_MTE_TCF_SHIFT)
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# define PR_MTE_TCF_MASK (3UL << PR_MTE_TCF_SHIFT)
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# define PR_MTE_TAG_SHIFT 3
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# define PR_MTE_TAG_MASK (0xffffUL << PR_MTE_TAG_SHIFT)
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#endif
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__BEGIN_DECLS
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/* Control process execution. */
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extern int prctl (int __option, ...) __THROW;
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__END_DECLS
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#endif /* sys/prctl.h */
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