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AArch64: Add MTE register set support for GDB and gdbserver

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AArch64 MTE support in the Linux kernel exposes a new register
through ptrace.  This patch adds the required code to support it.

include/ChangeLog:

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

	* elf/common.h (NT_ARM_TAGGED_ADDR_CTRL): Define.

gdb/ChangeLog:

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

	* aarch64-linux-nat.c (fetch_mteregs_from_thread): New function.
	(store_mteregs_to_thread): New function.
	(aarch64_linux_nat_target::fetch_registers): Update to call
	fetch_mteregs_from_thread.
	(aarch64_linux_nat_target::store_registers): Update to call
	store_mteregs_to_thread.
	* aarch64-tdep.c (aarch64_mte_register_names): New struct.
	(aarch64_cannot_store_register): Handle MTE registers.
	(aarch64_gdbarch_init): Initialize and setup MTE registers.
	* aarch64-tdep.h (gdbarch_tdep) <mte_reg_base>: New field.
	<has_mte>: New method.
	* arch/aarch64-linux.h (AARCH64_LINUX_SIZEOF_MTE): Define.

gdbserver/ChangeLog:

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

	* linux-aarch64-low.cc (aarch64_fill_mteregset): New function.
	(aarch64_store_mteregset): New function.
	(aarch64_regsets): Add MTE register set entry.
	(aarch64_sve_regsets): Add MTE register set entry.
This commit is contained in:
Luis Machado
2020-06-15 13:59:40 -03:00
parent c1bd443b4d
commit 5e984dbf35
8 changed files with 158 additions and 0 deletions
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3
include/elf/common.h
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@ -672,6 +672,9 @@
/* note name must be "LINUX". */
#define NT_ARM_PAC_MASK 0x406 /* AArch pointer authentication code masks */
/* note name must be "LINUX". */
#define NT_ARM_TAGGED_ADDR_CTRL 0x409 /* AArch64 tagged address control
(prctl()) */
/* note name must be "LINUX". */
#define NT_ARC_V2 0x600 /* ARC HS accumulator/extra registers. */
/* note name must be "LINUX". */
#define NT_RISCV_CSR 0x900 /* RISC-V Control and Status Registers */