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- /* Common Linux target-dependent functionality for AArch64 MTE
- Copyright (C) 2021-2022 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/>. */
- #include "arch/aarch64-mte-linux.h"
- /* See arch/aarch64-mte-linux.h */
- size_t
- aarch64_mte_get_tag_granules (CORE_ADDR addr, size_t len, size_t granule_size)
- {
- /* An empty range has 0 tag granules. */
- if (len == 0)
- return 0;
- /* Start address */
- CORE_ADDR s_addr = align_down (addr, granule_size);
- /* End address */
- CORE_ADDR e_addr = align_down (addr + len - 1, granule_size);
- /* We always have at least 1 granule because len is non-zero at this
- point. */
- return 1 + (e_addr - s_addr) / granule_size;
- }
- /* See arch/aarch64-mte-linux.h */
- CORE_ADDR
- aarch64_mte_make_ltag_bits (CORE_ADDR value)
- {
- return value & AARCH64_MTE_LOGICAL_MAX_VALUE;
- }
- /* See arch/aarch64-mte-linux.h */
- CORE_ADDR
- aarch64_mte_make_ltag (CORE_ADDR value)
- {
- return (aarch64_mte_make_ltag_bits (value)
- << AARCH64_MTE_LOGICAL_TAG_START_BIT);
- }
- /* See arch/aarch64-mte-linux.h */
- CORE_ADDR
- aarch64_mte_set_ltag (CORE_ADDR address, CORE_ADDR tag)
- {
- /* Remove the existing tag. */
- address &= ~aarch64_mte_make_ltag (AARCH64_MTE_LOGICAL_MAX_VALUE);
- /* Return the new tagged address. */
- return address | aarch64_mte_make_ltag (tag);
- }
- /* See arch/aarch64-mte-linux.h */
- CORE_ADDR
- aarch64_mte_get_ltag (CORE_ADDR address)
- {
- CORE_ADDR ltag_addr = address >> AARCH64_MTE_LOGICAL_TAG_START_BIT;
- return aarch64_mte_make_ltag_bits (ltag_addr);
- }
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