mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-02-11 13:02:10 +08:00
b782c65ba1
This commit moves aarch64_linux_memtag_matches_p,
aarch64_linux_set_memtags, aarch64_linux_get_memtag, and
aarch64_linux_memtag_to_string hooks (plus the aarch64_mte_get_atag
function used by them), along with the setting of the memtag granule
size, from aarch64-linux-tdep.c to aarch64-tdep.c, making MTE available
on baremetal targets. Since the aarch64-linux-tdep.c layer inherits
these hooks from aarch64-tdep.c, there is no effective change for
aarch64-linux targets.
Helpers used both by aarch64-tdep.c and by aarch64-linux-tdep.c were
moved from arch/aarch64-mte-linux.{c,h} to new arch/aarch64-mte.{c,h}
files.
Signed-off-by: Gustavo Romero <gustavo.romero@linaro.org>
Tested-By: Luis Machado <luis.machado@arm.com>
Approved-By: Luis Machado <luis.machado@arm.com>
Reviewed-By: Eli Zaretskii <eliz@gnu.org>
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/* Common Linux target-dependent functionality 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/>. */
|
|
|
|
#include "arch/aarch64-mte-linux.h"
|
|
|
|
/* See arch/aarch64-mte-linux.h */
|
|
|
|
void
|
|
aarch64_mte_pack_tags (gdb::byte_vector &tags)
|
|
{
|
|
/* Nothing to pack? */
|
|
if (tags.empty ())
|
|
return;
|
|
|
|
/* If the tags vector has an odd number of elements, add another
|
|
zeroed-out element to make it even. This facilitates packing. */
|
|
if ((tags.size () % 2) != 0)
|
|
tags.emplace_back (0);
|
|
|
|
for (int unpacked = 0, packed = 0; unpacked < tags.size ();
|
|
unpacked += 2, packed++)
|
|
tags[packed] = (tags[unpacked + 1] << 4) | tags[unpacked];
|
|
|
|
/* Now we have half the size. */
|
|
tags.resize (tags.size () / 2);
|
|
}
|
|
|
|
/* See arch/aarch64-mte-linux.h */
|
|
|
|
void
|
|
aarch64_mte_unpack_tags (gdb::byte_vector &tags, bool skip_first)
|
|
{
|
|
/* Nothing to unpack? */
|
|
if (tags.empty ())
|
|
return;
|
|
|
|
/* An unpacked MTE tags vector will have twice the number of elements
|
|
compared to an unpacked one. */
|
|
gdb::byte_vector unpacked_tags (tags.size () * 2);
|
|
|
|
int unpacked = 0, packed = 0;
|
|
|
|
if (skip_first)
|
|
{
|
|
/* We are not interested in the first unpacked element, just discard
|
|
it. */
|
|
unpacked_tags[unpacked] = (tags[packed] >> 4) & 0xf;
|
|
unpacked++;
|
|
packed++;
|
|
}
|
|
|
|
for (; packed < tags.size (); unpacked += 2, packed++)
|
|
{
|
|
unpacked_tags[unpacked] = tags[packed] & 0xf;
|
|
unpacked_tags[unpacked + 1] = (tags[packed] >> 4) & 0xf;
|
|
}
|
|
|
|
/* Update the original tags vector. */
|
|
tags = std::move (unpacked_tags);
|
|
}
|
|
|