AArch64: Read pauth section from core files

gdb/ChangeLog:

	* aarch64-linux-tdep.c
	(aarch64_linux_iterate_over_regset_sections): Check for pauth
	section.
	* aarch64-linux-tdep.h (AARCH64_LINUX_SIZEOF_PAUTH): New define.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c238819..798bcc4 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,6 +1,14 @@
 2019-03-22  Alan Hayward  <alan.hayward@arm.com>
            Jiong Wang  <jiong.wang@arm.com>
 
+       * aarch64-linux-tdep.c
+       (aarch64_linux_iterate_over_regset_sections): Check for pauth
+       section.
+       * aarch64-linux-tdep.h (AARCH64_LINUX_SIZEOF_PAUTH): New define.
+
+2019-03-22  Alan Hayward  <alan.hayward@arm.com>
+           Jiong Wang  <jiong.wang@arm.com>
+
        * aarch64-tdep.c (aarch64_analyze_prologue): Check for pauth
        instructions.
        (aarch64_analyze_prologue_test): Add PACIASP test.

diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
index d7db23e..bcd1961 100644 (file)
--- a/gdb/aarch64-linux-tdep.c
+++ b/gdb/aarch64-linux-tdep.c
@@ -627,6 +627,26 @@ aarch64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
   else
     cb (".reg2", AARCH64_LINUX_SIZEOF_FPREGSET, AARCH64_LINUX_SIZEOF_FPREGSET,
        &aarch64_linux_fpregset, NULL, cb_data);
+
+
+  if (tdep->has_pauth ())
+    {
+      /* Create this on the fly in order to handle the variable location.  */
+      const struct regcache_map_entry pauth_regmap[] =
+       {
+         { 2, AARCH64_PAUTH_DMASK_REGNUM (tdep->pauth_reg_base), 8},
+         { 0 }
+       };
+
+      const struct regset aarch64_linux_pauth_regset =
+       {
+         pauth_regmap, regcache_supply_regset, regcache_collect_regset
+       };
+
+      cb (".reg-aarch-pauth", AARCH64_LINUX_SIZEOF_PAUTH,
+         AARCH64_LINUX_SIZEOF_PAUTH, &aarch64_linux_pauth_regset,
+         "pauth registers", cb_data);
+    }
 }
 
 /* Implement the "core_read_description" gdbarch method.  */

diff --git a/gdb/aarch64-linux-tdep.h b/gdb/aarch64-linux-tdep.h
index e9f7c9b..ec494bf 100644 (file)
--- a/gdb/aarch64-linux-tdep.h
+++ b/gdb/aarch64-linux-tdep.h
@@ -33,6 +33,9 @@
    alignment.  */
 #define AARCH64_LINUX_SIZEOF_FPREGSET (33 * V_REGISTER_SIZE)
 
+/* The pauth regset consists of 2 X sized registers.  */
+#define AARCH64_LINUX_SIZEOF_PAUTH (2 * X_REGISTER_SIZE)
+
 extern const struct regset aarch64_linux_gregset;
 extern const struct regset aarch64_linux_fpregset;