2020-12-21 15:03:03 +00:00
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/* libc-internal interface for tagged (colored) memory support.
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2021-01-02 19:32:25 +00:00
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Copyright (C) 2020-2021 Free Software Foundation, Inc.
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2020-12-21 15:03:03 +00:00
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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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<http://www.gnu.org/licenses/>. */
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#ifndef _AARCH64_LIBC_MTAG_H
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#define _AARCH64_LIBC_MTAG_H 1
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#ifndef USE_MTAG
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/* Generic bindings for systems that do not support memory tagging. */
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#include_next "libc-mtag.h"
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#else
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/* Used to ensure additional alignment when objects need to have distinct
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tags. */
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#define __MTAG_GRANULE_SIZE 16
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/* Non-zero if memory obtained via morecore (sbrk) is not tagged. */
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#define __MTAG_SBRK_UNTAGGED 1
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/* Extra flags to pass to mmap to get tagged pages. */
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#define __MTAG_MMAP_FLAGS PROT_MTE
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/* Set the tags for a region of memory, which must have size and alignment
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that are multiples of __MTAG_GRANULE_SIZE. Size cannot be zero.
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void *__libc_mtag_tag_region (const void *, size_t) */
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void *__libc_mtag_tag_region (void *, size_t);
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/* Optimized equivalent to __libc_mtag_tag_region followed by memset. */
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void *__libc_mtag_memset_with_tag (void *, int, size_t);
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/* Convert address P to a pointer that is tagged correctly for that
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location.
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void *__libc_mtag_address_get_tag (void*) */
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void *__libc_mtag_address_get_tag (void *);
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/* Assign a new (random) tag to a pointer P (does not adjust the tag on
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the memory addressed).
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void *__libc_mtag_new_tag (void*) */
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void *__libc_mtag_new_tag (void *);
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#endif /* USE_MTAG */
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#endif /* _AARCH64_LIBC_MTAG_H */
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