projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 4601818e LM |
1 | /* Common Linux target-dependent functionality for AArch64 MTE |
| 2 | ||
| 88b9d363 | 3 | Copyright (C) 2021-2022 Free Software Foundation, Inc. |
| 4601818e LM |
4 | |
| 5 | This file is part of GDB. | |
| 6 | ||
| 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. | |
| 11 | ||
| 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. | |
| 16 | ||
| 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/>. */ | |
| 19 | ||
| 20 | #include "arch/aarch64-mte-linux.h" | |
| 21 | ||
| 22 | /* See arch/aarch64-mte-linux.h */ | |
| 23 | ||
| 24 | size_t | |
| 25 | aarch64_mte_get_tag_granules (CORE_ADDR addr, size_t len, size_t granule_size) | |
| 26 | { | |
| 27 | /* An empty range has 0 tag granules. */ | |
| 28 | if (len == 0) | |
| 29 | return 0; | |
| 30 | ||
| 31 | /* Start address */ | |
| 32 | CORE_ADDR s_addr = align_down (addr, granule_size); | |
| 33 | /* End address */ | |
| 0746f49b | 34 | CORE_ADDR e_addr = align_down (addr + len - 1, granule_size); |
| 4601818e | 35 | |
| 0746f49b LM |
36 | /* We always have at least 1 granule because len is non-zero at this |
| 37 | point. */ | |
| 4601818e LM |
38 | return 1 + (e_addr - s_addr) / granule_size; |
| 39 | } | |
| c7782e50 LM |
40 | |
| 41 | /* See arch/aarch64-mte-linux.h */ | |
| 42 | ||
| 43 | CORE_ADDR | |
| 44 | aarch64_mte_make_ltag_bits (CORE_ADDR value) | |
| 45 | { | |
| 46 | return value & AARCH64_MTE_LOGICAL_MAX_VALUE; | |
| 47 | } | |
| 48 | ||
| 49 | /* See arch/aarch64-mte-linux.h */ | |
| 50 | ||
| 51 | CORE_ADDR | |
| 52 | aarch64_mte_make_ltag (CORE_ADDR value) | |
| 53 | { | |
| 54 | return (aarch64_mte_make_ltag_bits (value) | |
| 55 | << AARCH64_MTE_LOGICAL_TAG_START_BIT); | |
| 56 | } | |
| 57 | ||
| 58 | /* See arch/aarch64-mte-linux.h */ | |
| 59 | ||
| 60 | CORE_ADDR | |
| 61 | aarch64_mte_set_ltag (CORE_ADDR address, CORE_ADDR tag) | |
| 62 | { | |
| 63 | /* Remove the existing tag. */ | |
| 64 | address &= ~aarch64_mte_make_ltag (AARCH64_MTE_LOGICAL_MAX_VALUE); | |
| 65 | ||
| 66 | /* Return the new tagged address. */ | |
| 67 | return address | aarch64_mte_make_ltag (tag); | |
| 68 | } | |
| 69 | ||
| 70 | /* See arch/aarch64-mte-linux.h */ | |
| 71 | ||
| 72 | CORE_ADDR | |
| 73 | aarch64_mte_get_ltag (CORE_ADDR address) | |
| 74 | { | |
| 75 | CORE_ADDR ltag_addr = address >> AARCH64_MTE_LOGICAL_TAG_START_BIT; | |
| 76 | return aarch64_mte_make_ltag_bits (ltag_addr); | |
| 77 | } |