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authorAlan Hayward <alan.hayward@arm.com>2019-03-22 09:58:42 +0000
committerAlan Hayward <alan.hayward@arm.com>2019-03-22 09:58:42 +0000
commit6dc0ebde59dfb73eae507ced718bafa54023bf33 (patch)
tree9cc851b66b4b94d633e576f1b955edfe9b63d81c /gdb/arch
parent968aa7ae389d9e6cecb5fda6826bf889ed959fce (diff)
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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.
Diffstat (limited to 'gdb/arch')
-rw-r--r--gdb/arch/aarch64.c6
-rw-r--r--gdb/arch/aarch64.h5
2 files changed, 8 insertions, 3 deletions
diff --git a/gdb/arch/aarch64.c b/gdb/arch/aarch64.c
index d36ed9d..11a15dd 100644
--- a/gdb/arch/aarch64.c
+++ b/gdb/arch/aarch64.c
@@ -22,11 +22,12 @@
#include "../features/aarch64-core.c"
#include "../features/aarch64-fpu.c"
#include "../features/aarch64-sve.c"
+#include "../features/aarch64-pauth.c"
/* See arch/aarch64.h. */
target_desc *
-aarch64_create_target_description (uint64_t vq)
+aarch64_create_target_description (uint64_t vq, bool pauth_p)
{
target_desc *tdesc = allocate_target_description ();
@@ -43,5 +44,8 @@ aarch64_create_target_description (uint64_t vq)
else
regnum = create_feature_aarch64_sve (tdesc, regnum, vq);
+ if (pauth_p)
+ regnum = create_feature_aarch64_pauth (tdesc, regnum);
+
return tdesc;
}
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