/* libc-internal interface for tagged (colored) memory support. Copyright (C) 2020-2021 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see . */ #ifndef _AARCH64_LIBC_MTAG_H #define _AARCH64_LIBC_MTAG_H 1 #ifndef USE_MTAG /* Generic bindings for systems that do not support memory tagging. */ #include_next "libc-mtag.h" #else /* Used to ensure additional alignment when objects need to have distinct tags. */ #define __MTAG_GRANULE_SIZE 16 /* Non-zero if memory obtained via morecore (sbrk) is not tagged. */ #define __MTAG_SBRK_UNTAGGED 1 /* Extra flags to pass to mmap to get tagged pages. */ #define __MTAG_MMAP_FLAGS PROT_MTE /* Set the tags for a region of memory, which must have size and alignment that are multiples of __MTAG_GRANULE_SIZE. Size cannot be zero. void *__libc_mtag_tag_region (const void *, size_t) */ void *__libc_mtag_tag_region (void *, size_t); /* Optimized equivalent to __libc_mtag_tag_region followed by memset. */ void *__libc_mtag_memset_with_tag (void *, int, size_t); /* Convert address P to a pointer that is tagged correctly for that location. void *__libc_mtag_address_get_tag (void*) */ void *__libc_mtag_address_get_tag (void *); /* Assign a new (random) tag to a pointer P (does not adjust the tag on the memory addressed). void *__libc_mtag_new_tag (void*) */ void *__libc_mtag_new_tag (void *); #endif /* USE_MTAG */ #endif /* _AARCH64_LIBC_MTAG_H */