1 /* Common Linux target-dependent functionality for AArch64 MTE
3 Copyright (C) 2021 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "arch/aarch64-mte-linux.h"
22 /* See arch/aarch64-mte-linux.h */
25 aarch64_mte_get_tag_granules (CORE_ADDR addr
, size_t len
, size_t granule_size
)
27 /* An empty range has 0 tag granules. */
32 CORE_ADDR s_addr
= align_down (addr
, granule_size
);
34 CORE_ADDR e_addr
= align_down (addr
+ len
- 1, granule_size
);
36 /* We always have at least 1 granule because len is non-zero at this
38 return 1 + (e_addr
- s_addr
) / granule_size
;
41 /* See arch/aarch64-mte-linux.h */
44 aarch64_mte_make_ltag_bits (CORE_ADDR value
)
46 return value
& AARCH64_MTE_LOGICAL_MAX_VALUE
;
49 /* See arch/aarch64-mte-linux.h */
52 aarch64_mte_make_ltag (CORE_ADDR value
)
54 return (aarch64_mte_make_ltag_bits (value
)
55 << AARCH64_MTE_LOGICAL_TAG_START_BIT
);
58 /* See arch/aarch64-mte-linux.h */
61 aarch64_mte_set_ltag (CORE_ADDR address
, CORE_ADDR tag
)
63 /* Remove the existing tag. */
64 address
&= ~aarch64_mte_make_ltag (AARCH64_MTE_LOGICAL_MAX_VALUE
);
66 /* Return the new tagged address. */
67 return address
| aarch64_mte_make_ltag (tag
);
70 /* See arch/aarch64-mte-linux.h */
73 aarch64_mte_get_ltag (CORE_ADDR address
)
75 CORE_ADDR ltag_addr
= address
>> AARCH64_MTE_LOGICAL_TAG_START_BIT
;
76 return aarch64_mte_make_ltag_bits (ltag_addr
);