gdb/arch/aarch64-mte-linux.h

   1 /* Common Linux target-dependent definitions for AArch64 MTE
   2
   3    Copyright (C) 2021-2024 Free Software Foundation, Inc.
   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 #ifndef GDB_ARCH_AARCH64_MTE_LINUX_H
  21 #define GDB_ARCH_AARCH64_MTE_LINUX_H
  22
  23
  24 /* Feature check for Memory Tagging Extension.  */
  25 #ifndef HWCAP2_MTE
  26 #define HWCAP2_MTE  (1 << 18)
  27 #endif
  28
  29 /* The MTE regset consists of a single 64-bit register.  */
  30 #define AARCH64_LINUX_SIZEOF_MTE 8
  31
  32 /* Memory tagging definitions.  */
  33 #ifndef SEGV_MTEAERR
  34 # define SEGV_MTEAERR 8
  35 # define SEGV_MTESERR 9
  36 #endif
  37
  38 /* Memory tag types for AArch64.  */
  39 enum class aarch64_memtag_type
  40 {
  41   /* MTE logical tag contained in pointers.  */
  42   mte_logical = 0,
  43   /* MTE allocation tag stored in memory tag granules.  */
  44   mte_allocation
  45 };
  46
  47 /* Given a TAGS vector containing 1 MTE tag per byte, pack the data as
  48    2 tags per byte and resize the vector.  */
  49 extern void aarch64_mte_pack_tags (gdb::byte_vector &tags);
  50
  51 /* Given a TAGS vector containing 2 MTE tags per byte, unpack the data as
  52    1 tag per byte and resize the vector.  If SKIP_FIRST is TRUE, skip the
  53    first unpacked element.  Otherwise leave it in the unpacked vector.  */
  54 extern void aarch64_mte_unpack_tags (gdb::byte_vector &tags, bool skip_first);
  55
  56 #endif /* GDB_ARCH_AARCH64_MTE_LINUX_H */