AArch64: Use HWCAP to detect pauth feature
authorAlan Hayward <alan.hayward@arm.com>
Fri, 22 Mar 2019 10:00:28 +0000 (10:00 +0000)
committerAlan Hayward <alan.hayward@arm.com>
Fri, 22 Mar 2019 10:10:22 +0000 (10:10 +0000)
commitee4fbcfa26eb4a2a3666f7c1cc31447c3cffa023
tree16ce0420d78dc816de2e8c1017a6b16efa229846
parent6dc0ebde59dfb73eae507ced718bafa54023bf33
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.
gdb/ChangeLog
gdb/aarch64-linux-nat.c
gdb/aarch64-linux-tdep.c
gdb/aarch64-linux-tdep.h
gdb/gdbserver/ChangeLog
gdb/gdbserver/linux-aarch64-low.c