[RFC 03/23] AARCH64: Replace regset_alloc() invocations by static regset structures

[Andreas Arnez <arnez@linux.vnet.ibm.com>]

After removal of the regset_alloc invocations, the tdep fields
'gregset' and 'fpregset' become obsolete and are thus removed.

gdb/
	* aarch64-linux-tdep.c (aarch64_linux_gregset)
	(aarch64_linux_fpregset): New static regset structures.
	(aarch64_linux_regset_from_core_section): Drop dynamic allocation
	of regset structures.
	* aarch64-tdep.h (struct gdbarch_tdep): Remove 'gregset' and
	'fpregset' fields.
---
 gdb/aarch64-linux-tdep.c | 29 +++++++++++++++--------------
 gdb/aarch64-tdep.h       |  4 ----
 2 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
index 92d1248..6f52c8c 100644
--- a/gdb/aarch64-linux-tdep.c
+++ b/gdb/aarch64-linux-tdep.c
@@ -240,6 +240,18 @@ supply_fpregset_from_core (const struct regset *regset,
   aarch64_linux_supply_fpregset (regcache, (const gdb_byte *) regbuf);
 }
 
+/* Register set definitions. */
+
+static const struct regset aarch64_linux_gregset =
+  {
+    NULL, supply_gregset_from_core, NULL
+  };
+
+static const struct regset aarch64_linux_fpregset =
+  {
+    NULL, supply_fpregset_from_core, NULL
+  };
+
 /* Implement the "regset_from_core_section" gdbarch method.  */
 
 static const struct regset *
@@ -247,25 +259,14 @@ aarch64_linux_regset_from_core_section (struct gdbarch *gdbarch,
 					const char *sect_name,
 					size_t sect_size)
 {
-  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
   if (strcmp (sect_name, ".reg") == 0
       && sect_size == AARCH64_LINUX_SIZEOF_GREGSET)
-    {
-      if (tdep->gregset == NULL)
-	tdep->gregset = regset_alloc (gdbarch, supply_gregset_from_core,
-				      NULL);
-      return tdep->gregset;
-    }
+    return &aarch64_linux_gregset;
 
   if (strcmp (sect_name, ".reg2") == 0
       && sect_size == AARCH64_LINUX_SIZEOF_FPREGSET)
-    {
-      if (tdep->fpregset == NULL)
-	tdep->fpregset = regset_alloc (gdbarch, supply_fpregset_from_core,
-				       NULL);
-      return tdep->fpregset;
-    }
+    return &aarch64_linux_fpregset;
+
   return NULL;
 }
 
diff --git a/gdb/aarch64-tdep.h b/gdb/aarch64-tdep.h
index 30a5ee3..78fb779 100644
--- a/gdb/aarch64-tdep.h
+++ b/gdb/aarch64-tdep.h
@@ -82,10 +82,6 @@ struct gdbarch_tdep
   /* And the size of each entry in the buf.  */
   size_t jb_elt_size;
 
-  /* Cached core file helpers.  */
-  struct regset *gregset;
-  struct regset *fpregset;
-
   /* Types for AdvSISD registers.  */
   struct type *vnq_type;
   struct type *vnd_type;
-- 
1.8.4.2