mirror of
https://sourceware.org/git/binutils-gdb.git
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1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/* Common Linux target-dependent functionality for AArch64 MTE
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Copyright (C) 2021-2024 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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void
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aarch64_mte_pack_tags (gdb::byte_vector &tags)
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{
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/* Nothing to pack? */
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if (tags.empty ())
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return;
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/* If the tags vector has an odd number of elements, add another
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zeroed-out element to make it even. This facilitates packing. */
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if ((tags.size () % 2) != 0)
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tags.emplace_back (0);
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for (int unpacked = 0, packed = 0; unpacked < tags.size ();
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unpacked += 2, packed++)
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tags[packed] = (tags[unpacked + 1] << 4) | tags[unpacked];
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/* Now we have half the size. */
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tags.resize (tags.size () / 2);
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}
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/* See arch/aarch64-mte-linux.h */
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void
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aarch64_mte_unpack_tags (gdb::byte_vector &tags, bool skip_first)
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{
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/* Nothing to unpack? */
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if (tags.empty ())
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return;
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/* An unpacked MTE tags vector will have twice the number of elements
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compared to an unpacked one. */
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gdb::byte_vector unpacked_tags (tags.size () * 2);
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int unpacked = 0, packed = 0;
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if (skip_first)
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{
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/* We are not interested in the first unpacked element, just discard
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it. */
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unpacked_tags[unpacked] = (tags[packed] >> 4) & 0xf;
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unpacked++;
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packed++;
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}
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for (; packed < tags.size (); unpacked += 2, packed++)
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{
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unpacked_tags[unpacked] = tags[packed] & 0xf;
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unpacked_tags[unpacked + 1] = (tags[packed] >> 4) & 0xf;
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}
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/* Update the original tags vector. */
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tags = std::move (unpacked_tags);
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}
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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 - 1, granule_size);
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/* We always have at least 1 granule because len is non-zero at this
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point. */
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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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