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/arch/aarch64.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'gdb/arch/aarch64.h') diff --git a/gdb/arch/aarch64.h b/gdb/arch/aarch64.h index 807a4a6..4fe6d02 100644 --- a/gdb/arch/aarch64.h +++ b/gdb/arch/aarch64.h @@ -24,9 +24,10 @@ /* Create the aarch64 target description. A non zero VQ value indicates both the presence of SVE and the Vector Quotient - the number of 128bit chunks in - an SVE Z register. */ + an SVE Z register. HAS_PAUTH_P indicates the presence of the PAUTH + feature. */ -target_desc *aarch64_create_target_description (uint64_t vq); +target_desc *aarch64_create_target_description (uint64_t vq, bool has_pauth_p); /* Register numbers of various important registers. Note that on SVE, the Z registers reuse the V register numbers and the V -- cgit v1.1