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c7782e50b1
This patch implements the memory tagging gdbarch hooks for AArch64, for the MTE feature. gdb/ChangeLog: 2021-03-24 Luis Machado <luis.machado@linaro.org> * aarch64-linux-tdep.c: Include target.h, arch-utils.h, value.h. (aarch64_mte_get_atag, aarch64_linux_tagged_address_p) (aarch64_linux_memtag_mismatch_p, aarch64_linux_set_memtags) (aarch64_linux_get_memtag, aarch64_linux_memtag_to_string): New functions. (aarch64_linux_init_abi): Initialize MTE-related gdbarch hooks. * arch/aarch64-mte-linux.c (aarch64_mte_make_ltag_bits) (aarch64_mte_make_ltag, aarch64_linux_set_ltag) (aarch64_linux_get_ltag): New functions. * arch/aarch64-mte-linux.h (AARCH64_MTE_LOGICAL_TAG_START_BIT) (AARCH64_MTE_LOGICAL_MAX_VALUE): Define. (aarch64_mte_make_ltag_bits, aarch64_mte_make_ltag) (aarch64_mte_set_ltag, aarch64_mte_get_ltag): New prototypes.
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/* Common Linux target-dependent functionality for AArch64 MTE
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "arch/aarch64-mte-linux.h"
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/* See arch/aarch64-mte-linux.h */
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size_t
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aarch64_mte_get_tag_granules (CORE_ADDR addr, size_t len, size_t granule_size)
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{
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/* An empty range has 0 tag granules. */
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if (len == 0)
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return 0;
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/* Start address */
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CORE_ADDR s_addr = align_down (addr, granule_size);
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/* End address */
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CORE_ADDR e_addr = align_down (addr + len, granule_size);
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/* We always have at least 1 granule. */
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return 1 + (e_addr - s_addr) / granule_size;
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}
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/* See arch/aarch64-mte-linux.h */
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CORE_ADDR
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aarch64_mte_make_ltag_bits (CORE_ADDR value)
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{
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return value & AARCH64_MTE_LOGICAL_MAX_VALUE;
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}
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/* See arch/aarch64-mte-linux.h */
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CORE_ADDR
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aarch64_mte_make_ltag (CORE_ADDR value)
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{
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return (aarch64_mte_make_ltag_bits (value)
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<< AARCH64_MTE_LOGICAL_TAG_START_BIT);
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}
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/* See arch/aarch64-mte-linux.h */
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CORE_ADDR
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aarch64_mte_set_ltag (CORE_ADDR address, CORE_ADDR tag)
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{
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/* Remove the existing tag. */
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address &= ~aarch64_mte_make_ltag (AARCH64_MTE_LOGICAL_MAX_VALUE);
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/* Return the new tagged address. */
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return address | aarch64_mte_make_ltag (tag);
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}
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/* See arch/aarch64-mte-linux.h */
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CORE_ADDR
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aarch64_mte_get_ltag (CORE_ADDR address)
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{
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CORE_ADDR ltag_addr = address >> AARCH64_MTE_LOGICAL_TAG_START_BIT;
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return aarch64_mte_make_ltag_bits (ltag_addr);
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}
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