[PATCH v2] gdb: aarch64: Support MTE on baremetal
Gustavo Romero
gustavo.romero@linaro.org
Wed Jul 24 00:46:33 GMT 2024
This commit moves aarch64_linux_memtag_matches_p,
aarch64_linux_set_memtags, aarch64_linux_get_memtag, and
aarch64_linux_memtag_to_string hooks (plus 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 in aarch64-tdep.c and in aarch64-linux-tdep.c where
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>
---
gdb/Makefile.in | 3 +
gdb/aarch64-linux-tdep.c | 168 +----------------------------------
gdb/aarch64-tdep.c | 168 +++++++++++++++++++++++++++++++++++
gdb/aarch64-tdep.h | 2 +
gdb/arch/aarch64-mte-linux.c | 56 ------------
gdb/arch/aarch64-mte-linux.h | 27 ------
gdb/arch/aarch64-mte.c | 77 ++++++++++++++++
gdb/arch/aarch64-mte.h | 51 +++++++++++
gdb/configure.tgt | 3 +-
9 files changed, 304 insertions(+), 251 deletions(-)
create mode 100644 gdb/arch/aarch64-mte.c
create mode 100644 gdb/arch/aarch64-mte.h
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 1c697bf0ab1..6744b8218ec 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -746,6 +746,7 @@ ALL_64_TARGET_OBS = \
amd64-windows-tdep.o \
arch/aarch64.o \
arch/aarch64-insn.o \
+ arch/aarch64-mte.o \
arch/aarch64-mte-linux.o \
arch/aarch64-scalable-linux.o \
arch/amd64-linux-tdesc.o \
@@ -1551,6 +1552,7 @@ HFILES_NO_SRCDIR = \
arch/aarch32.h \
arch/aarch64.h \
arch/aarch64-insn.h \
+ arch/aarch64-mte.h \
arch/aarch64-mte-linux.h \
arch/aarch64-scalable-linux.h \
arch/amd64-linux-tdesc.h \
@@ -1664,6 +1666,7 @@ ALLDEPFILES = \
arch/aarch32.c \
arch/aarch64.c \
arch/aarch64-insn.c \
+ arch/aarch64-mte.c \
arch/aarch64-mte-linux.c \
arch/aarch64-scalable-linux.c \
arch/amd64.c \
diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
index a1296a8f0c7..ada9614673e 100644
--- a/gdb/aarch64-linux-tdep.c
+++ b/gdb/aarch64-linux-tdep.c
@@ -48,6 +48,7 @@
#include "record-full.h"
#include "linux-record.h"
+#include "arch/aarch64-mte.h"
#include "arch/aarch64-mte-linux.h"
#include "arch/aarch64-scalable-linux.h"
@@ -2427,29 +2428,6 @@ aarch64_linux_gcc_target_options (struct gdbarch *gdbarch)
return {};
}
-/* Helper to get the allocation tag from a 64-bit ADDRESS.
-
- Return the allocation tag if successful and nullopt otherwise. */
-
-static std::optional<CORE_ADDR>
-aarch64_mte_get_atag (CORE_ADDR address)
-{
- gdb::byte_vector tags;
-
- /* Attempt to fetch the allocation tag. */
- if (!target_fetch_memtags (address, 1, tags,
- static_cast<int> (memtag_type::allocation)))
- return {};
-
- /* Only one tag should've been returned. Make sure we got exactly that. */
- if (tags.size () != 1)
- error (_("Target returned an unexpected number of tags."));
-
- /* Although our tags are 4 bits in size, they are stored in a
- byte. */
- return tags[0];
-}
-
/* Implement the tagged_address_p gdbarch method. */
static bool
@@ -2466,132 +2444,6 @@ aarch64_linux_tagged_address_p (struct gdbarch *gdbarch, CORE_ADDR address)
return true;
}
-/* Implement the memtag_matches_p gdbarch method. */
-
-static bool
-aarch64_linux_memtag_matches_p (struct gdbarch *gdbarch,
- struct value *address)
-{
- gdb_assert (address != nullptr);
-
- CORE_ADDR addr = value_as_address (address);
-
- /* Fetch the allocation tag for ADDRESS. */
- std::optional<CORE_ADDR> atag
- = aarch64_mte_get_atag (gdbarch_remove_non_address_bits (gdbarch, addr));
-
- if (!atag.has_value ())
- return true;
-
- /* Fetch the logical tag for ADDRESS. */
- gdb_byte ltag = aarch64_mte_get_ltag (addr);
-
- /* Are the tags the same? */
- return ltag == *atag;
-}
-
-/* Implement the set_memtags gdbarch method. */
-
-static bool
-aarch64_linux_set_memtags (struct gdbarch *gdbarch, struct value *address,
- size_t length, const gdb::byte_vector &tags,
- memtag_type tag_type)
-{
- gdb_assert (!tags.empty ());
- gdb_assert (address != nullptr);
-
- CORE_ADDR addr = value_as_address (address);
-
- /* Set the logical tag or the allocation tag. */
- if (tag_type == memtag_type::logical)
- {
- /* When setting logical tags, we don't care about the length, since
- we are only setting a single logical tag. */
- addr = aarch64_mte_set_ltag (addr, tags[0]);
-
- /* Update the value's content with the tag. */
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- gdb_byte *srcbuf = address->contents_raw ().data ();
- store_unsigned_integer (srcbuf, sizeof (addr), byte_order, addr);
- }
- else
- {
- /* Remove the top byte. */
- addr = gdbarch_remove_non_address_bits (gdbarch, addr);
-
- /* With G being the number of tag granules and N the number of tags
- passed in, we can have the following cases:
-
- 1 - G == N: Store all the N tags to memory.
-
- 2 - G < N : Warn about having more tags than granules, but write G
- tags.
-
- 3 - G > N : This is a "fill tags" operation. We should use the tags
- as a pattern to fill the granules repeatedly until we have
- written G tags to memory.
- */
-
- size_t g = aarch64_mte_get_tag_granules (addr, length,
- AARCH64_MTE_GRANULE_SIZE);
- size_t n = tags.size ();
-
- if (g < n)
- warning (_("Got more tags than memory granules. Tags will be "
- "truncated."));
- else if (g > n)
- warning (_("Using tag pattern to fill memory range."));
-
- if (!target_store_memtags (addr, length, tags,
- static_cast<int> (memtag_type::allocation)))
- return false;
- }
- return true;
-}
-
-/* Implement the get_memtag gdbarch method. */
-
-static struct value *
-aarch64_linux_get_memtag (struct gdbarch *gdbarch, struct value *address,
- memtag_type tag_type)
-{
- gdb_assert (address != nullptr);
-
- CORE_ADDR addr = value_as_address (address);
- CORE_ADDR tag = 0;
-
- /* Get the logical tag or the allocation tag. */
- if (tag_type == memtag_type::logical)
- tag = aarch64_mte_get_ltag (addr);
- else
- {
- /* Remove the top byte. */
- addr = gdbarch_remove_non_address_bits (gdbarch, addr);
- std::optional<CORE_ADDR> atag = aarch64_mte_get_atag (addr);
-
- if (!atag.has_value ())
- return nullptr;
-
- tag = *atag;
- }
-
- /* Convert the tag to a value. */
- return value_from_ulongest (builtin_type (gdbarch)->builtin_unsigned_int,
- tag);
-}
-
-/* Implement the memtag_to_string gdbarch method. */
-
-static std::string
-aarch64_linux_memtag_to_string (struct gdbarch *gdbarch, struct value *tag_value)
-{
- if (tag_value == nullptr)
- return "";
-
- CORE_ADDR tag = value_as_address (tag_value);
-
- return string_printf ("0x%s", phex_nz (tag, sizeof (tag)));
-}
/* AArch64 Linux implementation of the report_signal_info gdbarch
hook. Displays information about possible memory tag violations. */
@@ -2900,24 +2752,6 @@ aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* Register a hook for checking if an address is tagged or not. */
set_gdbarch_tagged_address_p (gdbarch, aarch64_linux_tagged_address_p);
- /* Register a hook for checking if there is a memory tag match. */
- set_gdbarch_memtag_matches_p (gdbarch,
- aarch64_linux_memtag_matches_p);
-
- /* Register a hook for setting the logical/allocation tags for
- a range of addresses. */
- set_gdbarch_set_memtags (gdbarch, aarch64_linux_set_memtags);
-
- /* Register a hook for extracting the logical/allocation tag from an
- address. */
- set_gdbarch_get_memtag (gdbarch, aarch64_linux_get_memtag);
-
- /* Set the allocation tag granule size to 16 bytes. */
- set_gdbarch_memtag_granule_size (gdbarch, AARCH64_MTE_GRANULE_SIZE);
-
- /* Register a hook for converting a memory tag to a string. */
- set_gdbarch_memtag_to_string (gdbarch, aarch64_linux_memtag_to_string);
-
set_gdbarch_report_signal_info (gdbarch,
aarch64_linux_report_signal_info);
diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index e4bca6c6632..865b1c0b13b 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -45,6 +45,7 @@
#include "aarch64-tdep.h"
#include "aarch64-ravenscar-thread.h"
+#include "arch/aarch64-mte.h"
#include "record.h"
#include "record-full.h"
@@ -4088,6 +4089,156 @@ aarch64_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc)
return streq (inst.opcode->name, "ret");
}
+/* Helper to get the allocation tag from a 64-bit ADDRESS.
+
+ Return the allocation tag if successful and nullopt otherwise. */
+
+std::optional<CORE_ADDR>
+aarch64_mte_get_atag (CORE_ADDR address)
+{
+ gdb::byte_vector tags;
+
+ /* Attempt to fetch the allocation tag. */
+ if (!target_fetch_memtags (address, 1, tags,
+ static_cast<int> (memtag_type::allocation)))
+ return {};
+
+ /* Only one tag should've been returned. Make sure we got exactly that. */
+ if (tags.size () != 1)
+ error (_("Target returned an unexpected number of tags."));
+
+ /* Although our tags are 4 bits in size, they are stored in a
+ byte. */
+ return tags[0];
+}
+
+/* Implement the memtag_matches_p gdbarch method. */
+
+static bool
+aarch64_memtag_matches_p (struct gdbarch *gdbarch,
+ struct value *address)
+{
+ gdb_assert (address != nullptr);
+
+ CORE_ADDR addr = value_as_address (address);
+
+ /* Fetch the allocation tag for ADDRESS. */
+ std::optional<CORE_ADDR> atag
+ = aarch64_mte_get_atag (gdbarch_remove_non_address_bits (gdbarch, addr));
+
+ if (!atag.has_value ())
+ return true;
+
+ /* Fetch the logical tag for ADDRESS. */
+ gdb_byte ltag = aarch64_mte_get_ltag (addr);
+
+ /* Are the tags the same? */
+ return ltag == *atag;
+}
+
+/* Implement the set_memtags gdbarch method. */
+
+static bool
+aarch64_set_memtags (struct gdbarch *gdbarch, struct value *address,
+ size_t length, const gdb::byte_vector &tags,
+ memtag_type tag_type)
+{
+ gdb_assert (!tags.empty ());
+ gdb_assert (address != nullptr);
+
+ CORE_ADDR addr = value_as_address (address);
+
+ /* Set the logical tag or the allocation tag. */
+ if (tag_type == memtag_type::logical)
+ {
+ /* When setting logical tags, we don't care about the length, since
+ we are only setting a single logical tag. */
+ addr = aarch64_mte_set_ltag (addr, tags[0]);
+
+ /* Update the value's content with the tag. */
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte *srcbuf = address->contents_raw ().data ();
+ store_unsigned_integer (srcbuf, sizeof (addr), byte_order, addr);
+ }
+ else
+ {
+ /* Remove the top byte. */
+ addr = gdbarch_remove_non_address_bits (gdbarch, addr);
+
+ /* With G being the number of tag granules and N the number of tags
+ passed in, we can have the following cases:
+
+ 1 - G == N: Store all the N tags to memory.
+
+ 2 - G < N : Warn about having more tags than granules, but write G
+ tags.
+
+ 3 - G > N : This is a "fill tags" operation. We should use the tags
+ as a pattern to fill the granules repeatedly until we have
+ written G tags to memory.
+ */
+
+ size_t g = aarch64_mte_get_tag_granules (addr, length,
+ AARCH64_MTE_GRANULE_SIZE);
+ size_t n = tags.size ();
+
+ if (g < n)
+ warning (_("Got more tags than memory granules. Tags will be "
+ "truncated."));
+ else if (g > n)
+ warning (_("Using tag pattern to fill memory range."));
+
+ if (!target_store_memtags (addr, length, tags,
+ static_cast<int> (memtag_type::allocation)))
+ return false;
+ }
+ return true;
+}
+
+/* Implement the get_memtag gdbarch method. */
+
+static struct value *
+aarch64_get_memtag (struct gdbarch *gdbarch, struct value *address,
+ memtag_type tag_type)
+{
+ gdb_assert (address != nullptr);
+
+ CORE_ADDR addr = value_as_address (address);
+ CORE_ADDR tag = 0;
+
+ /* Get the logical tag or the allocation tag. */
+ if (tag_type == memtag_type::logical)
+ tag = aarch64_mte_get_ltag (addr);
+ else
+ {
+ /* Remove the top byte. */
+ addr = gdbarch_remove_non_address_bits (gdbarch, addr);
+ std::optional<CORE_ADDR> atag = aarch64_mte_get_atag (addr);
+
+ if (!atag.has_value ())
+ return nullptr;
+
+ tag = *atag;
+ }
+
+ /* Convert the tag to a value. */
+ return value_from_ulongest (builtin_type (gdbarch)->builtin_unsigned_int,
+ tag);
+}
+
+/* Implement the memtag_to_string gdbarch method. */
+
+static std::string
+aarch64_memtag_to_string (struct gdbarch *gdbarch, struct value *tag_value)
+{
+ if (tag_value == nullptr)
+ return "";
+
+ CORE_ADDR tag = value_as_address (tag_value);
+
+ return string_printf ("0x%s", phex_nz (tag, sizeof (tag)));
+}
+
/* AArch64 implementation of the remove_non_address_bits gdbarch hook. Remove
non address bits from a pointer value. */
@@ -4504,6 +4655,23 @@ aarch64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
aarch64_pseudo_register_reggroup_p);
set_gdbarch_cannot_store_register (gdbarch, aarch64_cannot_store_register);
+ /* Set the allocation tag granule size to 16 bytes. */
+ set_gdbarch_memtag_granule_size (gdbarch, AARCH64_MTE_GRANULE_SIZE);
+
+ /* Register a hook for checking if there is a memory tag match. */
+ set_gdbarch_memtag_matches_p (gdbarch, aarch64_memtag_matches_p);
+
+ /* Register a hook for setting the logical/allocation tags for
+ a range of addresses. */
+ set_gdbarch_set_memtags (gdbarch, aarch64_set_memtags);
+
+ /* Register a hook for extracting the logical/allocation tag from an
+ address. */
+ set_gdbarch_get_memtag (gdbarch, aarch64_get_memtag);
+
+ /* Register a hook for converting a memory tag to a string. */
+ set_gdbarch_memtag_to_string (gdbarch, aarch64_memtag_to_string);
+
/* ABI */
set_gdbarch_short_bit (gdbarch, 16);
set_gdbarch_int_bit (gdbarch, 32);
diff --git a/gdb/aarch64-tdep.h b/gdb/aarch64-tdep.h
index 0e6024bfcbc..50166fb4f24 100644
--- a/gdb/aarch64-tdep.h
+++ b/gdb/aarch64-tdep.h
@@ -203,4 +203,6 @@ void aarch64_displaced_step_fixup (struct gdbarch *gdbarch,
bool aarch64_displaced_step_hw_singlestep (struct gdbarch *gdbarch);
+std::optional<CORE_ADDR> aarch64_mte_get_atag (CORE_ADDR address);
+
#endif /* aarch64-tdep.h */
diff --git a/gdb/arch/aarch64-mte-linux.c b/gdb/arch/aarch64-mte-linux.c
index e0b441e3859..49426d7751c 100644
--- a/gdb/arch/aarch64-mte-linux.c
+++ b/gdb/arch/aarch64-mte-linux.c
@@ -75,59 +75,3 @@ aarch64_mte_unpack_tags (gdb::byte_vector &tags, bool skip_first)
tags = std::move (unpacked_tags);
}
-/* See arch/aarch64-mte-linux.h */
-
-size_t
-aarch64_mte_get_tag_granules (CORE_ADDR addr, size_t len, size_t granule_size)
-{
- /* An empty range has 0 tag granules. */
- if (len == 0)
- return 0;
-
- /* Start address */
- CORE_ADDR s_addr = align_down (addr, granule_size);
- /* End address */
- CORE_ADDR e_addr = align_down (addr + len - 1, granule_size);
-
- /* We always have at least 1 granule because len is non-zero at this
- point. */
- return 1 + (e_addr - s_addr) / granule_size;
-}
-
-/* See arch/aarch64-mte-linux.h */
-
-CORE_ADDR
-aarch64_mte_make_ltag_bits (CORE_ADDR value)
-{
- return value & AARCH64_MTE_LOGICAL_MAX_VALUE;
-}
-
-/* See arch/aarch64-mte-linux.h */
-
-CORE_ADDR
-aarch64_mte_make_ltag (CORE_ADDR value)
-{
- return (aarch64_mte_make_ltag_bits (value)
- << AARCH64_MTE_LOGICAL_TAG_START_BIT);
-}
-
-/* See arch/aarch64-mte-linux.h */
-
-CORE_ADDR
-aarch64_mte_set_ltag (CORE_ADDR address, CORE_ADDR tag)
-{
- /* Remove the existing tag. */
- address &= ~aarch64_mte_make_ltag (AARCH64_MTE_LOGICAL_MAX_VALUE);
-
- /* Return the new tagged address. */
- return address | aarch64_mte_make_ltag (tag);
-}
-
-/* See arch/aarch64-mte-linux.h */
-
-CORE_ADDR
-aarch64_mte_get_ltag (CORE_ADDR address)
-{
- CORE_ADDR ltag_addr = address >> AARCH64_MTE_LOGICAL_TAG_START_BIT;
- return aarch64_mte_make_ltag_bits (ltag_addr);
-}
diff --git a/gdb/arch/aarch64-mte-linux.h b/gdb/arch/aarch64-mte-linux.h
index 460b10e05c9..686749f547a 100644
--- a/gdb/arch/aarch64-mte-linux.h
+++ b/gdb/arch/aarch64-mte-linux.h
@@ -29,12 +29,6 @@
/* The MTE regset consists of a single 64-bit register. */
#define AARCH64_LINUX_SIZEOF_MTE 8
-/* We have one tag per 16 bytes of memory. */
-#define AARCH64_MTE_GRANULE_SIZE 16
-#define AARCH64_MTE_TAG_BIT_SIZE 4
-#define AARCH64_MTE_LOGICAL_TAG_START_BIT 56
-#define AARCH64_MTE_LOGICAL_MAX_VALUE 0xf
-
/* Memory tagging definitions. */
#ifndef SEGV_MTEAERR
# define SEGV_MTEAERR 8
@@ -50,27 +44,6 @@ enum class aarch64_memtag_type
mte_allocation
};
-/* Return the number of tag granules in the memory range
- [ADDR, ADDR + LEN) given GRANULE_SIZE. */
-extern size_t aarch64_mte_get_tag_granules (CORE_ADDR addr, size_t len,
- size_t granule_size);
-
-/* Return the 4-bit tag made from VALUE. */
-extern CORE_ADDR aarch64_mte_make_ltag_bits (CORE_ADDR value);
-
-/* Return the 4-bit tag that can be OR-ed to an address. */
-extern CORE_ADDR aarch64_mte_make_ltag (CORE_ADDR value);
-
-/* Helper to set the logical TAG for a 64-bit ADDRESS.
-
- It is always possible to set the logical tag. */
-extern CORE_ADDR aarch64_mte_set_ltag (CORE_ADDR address, CORE_ADDR tag);
-
-/* Helper to get the logical tag from a 64-bit ADDRESS.
-
- It is always possible to get the logical tag. */
-extern CORE_ADDR aarch64_mte_get_ltag (CORE_ADDR address);
-
/* Given a TAGS vector containing 1 MTE tag per byte, pack the data as
2 tags per byte and resize the vector. */
extern void aarch64_mte_pack_tags (gdb::byte_vector &tags);
diff --git a/gdb/arch/aarch64-mte.c b/gdb/arch/aarch64-mte.c
new file mode 100644
index 00000000000..908e12cdf3b
--- /dev/null
+++ b/gdb/arch/aarch64-mte.c
@@ -0,0 +1,77 @@
+/* Common AArch64 functionality for 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.h"
+
+/* See arch/aarch64-mte.h */
+
+size_t
+aarch64_mte_get_tag_granules (CORE_ADDR addr, size_t len, size_t granule_size)
+{
+ /* An empty range has 0 tag granules. */
+ if (len == 0)
+ return 0;
+
+ /* Start address */
+ CORE_ADDR s_addr = align_down (addr, granule_size);
+ /* End address */
+ CORE_ADDR e_addr = align_down (addr + len - 1, granule_size);
+
+ /* We always have at least 1 granule because len is non-zero at this
+ point. */
+ return 1 + (e_addr - s_addr) / granule_size;
+}
+
+/* See arch/aarch64-mte.h */
+
+CORE_ADDR
+aarch64_mte_make_ltag_bits (CORE_ADDR value)
+{
+ return value & AARCH64_MTE_LOGICAL_MAX_VALUE;
+}
+
+/* See arch/aarch64-mte.h */
+
+CORE_ADDR
+aarch64_mte_make_ltag (CORE_ADDR value)
+{
+ return (aarch64_mte_make_ltag_bits (value)
+ << AARCH64_MTE_LOGICAL_TAG_START_BIT);
+}
+
+/* See arch/aarch64-mte.h */
+
+CORE_ADDR
+aarch64_mte_set_ltag (CORE_ADDR address, CORE_ADDR tag)
+{
+ /* Remove the existing tag. */
+ address &= ~aarch64_mte_make_ltag (AARCH64_MTE_LOGICAL_MAX_VALUE);
+
+ /* Return the new tagged address. */
+ return address | aarch64_mte_make_ltag (tag);
+}
+
+/* See arch/aarch64-mte.h */
+
+CORE_ADDR
+aarch64_mte_get_ltag (CORE_ADDR address)
+{
+ CORE_ADDR ltag_addr = address >> AARCH64_MTE_LOGICAL_TAG_START_BIT;
+ return aarch64_mte_make_ltag_bits (ltag_addr);
+}
diff --git a/gdb/arch/aarch64-mte.h b/gdb/arch/aarch64-mte.h
new file mode 100644
index 00000000000..7d8445ee89f
--- /dev/null
+++ b/gdb/arch/aarch64-mte.h
@@ -0,0 +1,51 @@
+/* Common AArch64 definitions for 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/>. */
+
+#ifndef ARCH_AARCH64_MTE_H
+#define ARCH_AARCH64_MTE_H
+
+
+/* We have one tag per 16 bytes of memory. */
+#define AARCH64_MTE_GRANULE_SIZE 16
+#define AARCH64_MTE_TAG_BIT_SIZE 4
+#define AARCH64_MTE_LOGICAL_TAG_START_BIT 56
+#define AARCH64_MTE_LOGICAL_MAX_VALUE 0xf
+
+/* Return the number of tag granules in the memory range
+ [ADDR, ADDR + LEN) given GRANULE_SIZE. */
+extern size_t aarch64_mte_get_tag_granules (CORE_ADDR addr, size_t len,
+ size_t granule_size);
+
+/* Return the 4-bit tag made from VALUE. */
+extern CORE_ADDR aarch64_mte_make_ltag_bits (CORE_ADDR value);
+
+/* Return the 4-bit tag that can be OR-ed to an address. */
+extern CORE_ADDR aarch64_mte_make_ltag (CORE_ADDR value);
+
+/* Helper to set the logical TAG for a 64-bit ADDRESS.
+
+ It is always possible to set the logical tag. */
+extern CORE_ADDR aarch64_mte_set_ltag (CORE_ADDR address, CORE_ADDR tag);
+
+/* Helper to get the logical tag from a 64-bit ADDRESS.
+
+ It is always possible to get the logical tag. */
+extern CORE_ADDR aarch64_mte_get_ltag (CORE_ADDR address);
+
+#endif /* ARCH_AARCH64_MTE_H */
diff --git a/gdb/configure.tgt b/gdb/configure.tgt
index 8326c458eb1..5fb14b65426 100644
--- a/gdb/configure.tgt
+++ b/gdb/configure.tgt
@@ -59,7 +59,8 @@ amd64_tobjs="ravenscar-thread.o amd64-ravenscar-thread.o \
case "${targ}" in
aarch64*-*-*)
cpu_obs="aarch32-tdep.o aarch64-tdep.o arch/aarch32.o \
- arch/aarch64-insn.o arch/aarch64.o ravenscar-thread.o \
+ arch/aarch64-insn.o arch/aarch64.o arch/aarch64-mte.o \
+ ravenscar-thread.o \
aarch64-ravenscar-thread.o";;
alpha*-*-*)
--
2.34.1
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