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/* Common Linux target-dependent definitions for AArch64 MTE
Copyright (C) 2021-2024 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef ARCH_AARCH64_MTE_LINUX_H
#define ARCH_AARCH64_MTE_LINUX_H
/* Feature check for Memory Tagging Extension. */
#ifndef HWCAP2_MTE
#define HWCAP2_MTE (1 << 18)
#endif
/* The MTE regset consists of a single 64-bit register. */
#define AARCH64_LINUX_SIZEOF_MTE 8
/* Memory tagging definitions. */
#ifndef SEGV_MTEAERR
# define SEGV_MTEAERR 8
# define SEGV_MTESERR 9
#endif
/* Memory tag types for AArch64. */
enum class aarch64_memtag_type
{
/* MTE logical tag contained in pointers. */
mte_logical = 0,
/* MTE allocation tag stored in memory tag granules. */
mte_allocation
};
/* Given a TAGS vector containing 1 MTE tag per byte, pack the data as
2 tags per byte and resize the vector. */
extern void aarch64_mte_pack_tags (gdb::byte_vector &tags);
/* Given a TAGS vector containing 2 MTE tags per byte, unpack the data as
1 tag per byte and resize the vector. If SKIP_FIRST is TRUE, skip the
first unpacked element. Otherwise leave it in the unpacked vector. */
extern void aarch64_mte_unpack_tags (gdb::byte_vector &tags, bool skip_first);
#endif /* ARCH_AARCH64_MTE_LINUX_H */
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