From 6dc0ebde59dfb73eae507ced718bafa54023bf33 Mon Sep 17 00:00:00 2001 From: Alan Hayward Date: Fri, 22 Mar 2019 09:58:42 +0000 Subject: AArch64: Add pointer authentication feature Pointer Authentication is a new feature in AArch64 v8.3-a. When enabled in the compiler, function return addresses will be mangled by the kernel. Add register description xml and wire up to aarch64_linux_read_description. This description includes the two pauth user registers. Nothing yet uses the feature - that is added in later patches. gdb/ChangeLog: * aarch64-linux-nat.c (aarch64_linux_nat_target::read_description): Add pauth param. * aarch64-linux-tdep.c (aarch64_linux_core_read_description): Likewise. * aarch64-tdep.c (struct target_desc): Add in pauth. (aarch64_read_description): Add pauth param. (aarch64_gdbarch_init): Likewise. * aarch64-tdep.h (aarch64_read_description): Likewise. * arch/aarch64.c (aarch64_create_target_description): Likewise. * arch/aarch64.h (aarch64_create_target_description): Likewise. * features/Makefile: Add new files. * features/aarch64-pauth.c: New file. * features/aarch64-pauth.xml: New file. gdb/doc/ChangeLog: * gdb.texinfo: Describe pauth feature. gdb/gdbserver/ChangeLog: * linux-aarch64-ipa.c (get_ipa_tdesc): Add pauth param. (initialize_low_tracepoint): Likewise. * linux-aarch64-low.c (aarch64_arch_setup): Likewise. * linux-aarch64-tdesc-selftest.c (aarch64_tdesc_test): Likewise. * linux-aarch64-tdesc.c (struct target_desc): Likewise. (aarch64_linux_read_description): Likewise. * linux-aarch64-tdesc.h (aarch64_linux_read_description): Likewise. --- gdb/features/aarch64-pauth.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 gdb/features/aarch64-pauth.c (limited to 'gdb/features/aarch64-pauth.c') diff --git a/gdb/features/aarch64-pauth.c b/gdb/features/aarch64-pauth.c new file mode 100644 index 0000000..e4b84ff --- /dev/null +++ b/gdb/features/aarch64-pauth.c @@ -0,0 +1,16 @@ +/* THIS FILE IS GENERATED. -*- buffer-read-only: t -*- vi:set ro: + Original: aarch64-pauth.xml */ + +#include "common/tdesc.h" + +static int +create_feature_aarch64_pauth (struct target_desc *result, long regnum) +{ + struct tdesc_feature *feature; + + feature = tdesc_create_feature (result, "org.gnu.gdb.aarch64.pauth"); + tdesc_create_reg (feature, "pauth_dmask", regnum++, 1, NULL, 64, "int"); + tdesc_create_reg (feature, "pauth_cmask", regnum++, 1, NULL, 64, "int"); + + return regnum; +} -- cgit v1.1