commit ee4fbcfa26eb4a2a3666f7c1cc31447c3cffa023
author Alan Hayward <alan.hayward@arm.com> Fri Mar 22 10:00:28 2019 +0000
committer Alan Hayward <alan.hayward@arm.com> Fri Mar 22 10:10:22 2019 +0000
tree 16ce0420d78dc816de2e8c1017a6b16efa229846
parent 6dc0ebde59dfb73eae507ced718bafa54023bf33

AArch64: Use HWCAP to detect pauth feature

Add aarch64_get_hwcap functions for reading the HWCAP.
From this extract the PACA value and use this to enable pauth.

gdb/ChangeLog:

	* aarch64-linux-nat.c
	(aarch64_linux_nat_target::read_description): Read PACA hwcap.
	* aarch64-linux-tdep.c
	(aarch64_linux_core_read_description): Likewise.
	(aarch64_linux_get_hwcap): New function.
	* aarch64-linux-tdep.h (AARCH64_HWCAP_PACA): New define.
	(aarch64_linux_get_hwcap): New declaration.

gdb/gdbserver/ChangeLog:

	* linux-aarch64-low.c (AARCH64_HWCAP_PACA): New define.
	(aarch64_get_hwcap): New function.
	(aarch64_arch_setup): Read APIA hwcap.