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3 Commits

Author SHA1 Message Date
Luis Machado
0746f49b1d [AArch64] Fix off-by-one when calculating tag granules. 
When we want to fetch tags from a memory range, the last address in that
range is not included.

There is a off-by-one error in aarch64_mte_get_tag_granules, which this
patch fixes.

gdb/ChangeLog:

2021-05-13  Luis Machado  <luis.machado@linaro.org>

	* arch/aarch64-mte-linux.c (aarch64_mte_get_tag_granules): Don't
	include the last address in the range.
 2021-05-13 10:15:26 -03:00
Luis Machado
c7782e50b1 AArch64: Implement the memory tagging gdbarch hooks 
This patch implements the memory tagging gdbarch hooks for AArch64, for
the MTE feature.

gdb/ChangeLog:

2021-03-24  Luis Machado  <luis.machado@linaro.org>

	* aarch64-linux-tdep.c: Include target.h, arch-utils.h, value.h.
	(aarch64_mte_get_atag, aarch64_linux_tagged_address_p)
	(aarch64_linux_memtag_mismatch_p, aarch64_linux_set_memtags)
	(aarch64_linux_get_memtag, aarch64_linux_memtag_to_string): New
	functions.
	(aarch64_linux_init_abi): Initialize MTE-related gdbarch hooks.
	* arch/aarch64-mte-linux.c (aarch64_mte_make_ltag_bits)
	(aarch64_mte_make_ltag, aarch64_linux_set_ltag)
	(aarch64_linux_get_ltag): New functions.
	* arch/aarch64-mte-linux.h (AARCH64_MTE_LOGICAL_TAG_START_BIT)
	(AARCH64_MTE_LOGICAL_MAX_VALUE): Define.
	(aarch64_mte_make_ltag_bits, aarch64_mte_make_ltag)
	(aarch64_mte_set_ltag, aarch64_mte_get_ltag): New prototypes.
 2021-03-24 14:55:14 -03:00
Luis Machado
4601818e8c AArch64: Implement memory tagging target methods for AArch64 
The patch implements the memory tagging target hooks for AArch64, so we
can handle MTE.

gdb/ChangeLog:

2021-03-24  Luis Machado  <luis.machado@linaro.org>

	* Makefile.in (ALL_64_TARGET_OBS): Add arch/aarch64-mte-linux.o.
	(HFILES_NO_SRCDIR): Add arch/aarch64-mte-linux.h and
	nat/aarch64-mte-linux-ptrace.h.
	* aarch64-linux-nat.c: Include nat/aarch64-mte-linux-ptrace.h.
	(aarch64_linux_nat_target) <supports_memory_tagging>: New method
	override.
	<fetch_memtags>: New method override.
	<store_memtags>: New method override.
	(aarch64_linux_nat_target::supports_memory_tagging): New method.
	(aarch64_linux_nat_target::fetch_memtags): New method.
	(aarch64_linux_nat_target::store_memtags): New method.
	* arch/aarch64-mte-linux.c: New file.
	* arch/aarch64-mte-linux.h: Include gdbsupport/common-defs.h.
	(AARCH64_MTE_GRANULE_SIZE): Define.
	(aarch64_memtag_type): New enum.
	(aarch64_mte_get_tag_granules): New prototype.
	* configure.nat (NATDEPFILES): Add nat/aarch64-mte-linux-ptrace.o.
	* configure.tgt (aarch64*-*-linux*): Add arch/aarch64-mte-linux.o.
	* nat/aarch64-mte-linux-ptrace.c: New file.
	* nat/aarch64-mte-linux-ptrace.h: New file.
 2021-03-24 14:53:56 -03:00