mirrors/binutils-gdb
1
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2024-11-23 01:53:38 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

gdb: AArch64: Support MTE on baremetal

Browse Source 
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>
This commit is contained in:
Gustavo Romero 2024-07-30 14:39:36 +00:00 committed by Luis Machado
parent 1d4ed59075
commit b782c65ba1
12 changed files with 309 additions and 251 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
gdb/Makefile.in
View File

@ -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 \

3
gdb/NEWS
View File

@ -17,6 +17,9 @@
This may cause breakage when using an incompatible libc, like uclibc or
newlib, or an older glibc.
* MTE (Memory Tagging Extension) debugging is now supported on AArch64 baremetal
targets.
*** Changes in GDB 15
* The MPX commands "show/set mpx bound" have been deprecated, as Intel

168
gdb/aarch64-linux-tdep.c
View File

@ -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);

168
gdb/aarch64-tdep.c
View File

@ -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);

2
gdb/aarch64-tdep.h
View File

@ -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 */

56
gdb/arch/aarch64-mte-linux.c
View File

@ -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);
}

27
gdb/arch/aarch64-mte-linux.h
View File

@ -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);

77
gdb/arch/aarch64-mte.c Normal file
View File

@ -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);
}

51
gdb/arch/aarch64-mte.h Normal file
View File

@ -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 */

3
gdb/configure.tgt
View File

@ -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*-*-*)

1
gdb/nat/aarch64-mte-linux-ptrace.c
View File

@ -22,6 +22,7 @@
#include "linux-ptrace.h"
#include "arch/aarch64.h"
#include "arch/aarch64-mte.h"
#include "arch/aarch64-mte-linux.h"
#include "nat/aarch64-linux.h"
#include "nat/aarch64-mte-linux-ptrace.h"

1
gdbserver/configure.srv
View File

@ -48,6 +48,7 @@ case "${gdbserver_host}" in
srv_tgtobj="$srv_tgtobj nat/aarch64-linux.o"
srv_tgtobj="$srv_tgtobj arch/aarch64-insn.o"
srv_tgtobj="$srv_tgtobj arch/aarch64.o"
srv_tgtobj="$srv_tgtobj arch/aarch64-mte.o"
srv_tgtobj="$srv_tgtobj arch/aarch64-mte-linux.o"
srv_tgtobj="$srv_tgtobj arch/aarch64-scalable-linux.o"
srv_tgtobj="$srv_tgtobj linux-aarch64-tdesc.o"