[RFC 04/23] ARM: Replace regset_alloc() invocations by static regset structures

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

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

gdb/
	* arm-linux-tdep.c (arm_linux_gregset, arm_linux_fpregset)
	(arm_linux_vfpregset): New static regset structures.
	(arm_linux_regset_from_core_section): Remove dynamic allocation of
	regset structures.
	* arm-tdep.h (struct gdbarch_tdep): Remove 'gregset', 'fpregset',
	and 'vfpregset' fields.
---
 gdb/arm-linux-tdep.c | 38 ++++++++++++++++++--------------------
 gdb/arm-tdep.h       |  3 ---
 2 files changed, 18 insertions(+), 23 deletions(-)

diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c
index 98b912b..028a95b 100644
--- a/gdb/arm-linux-tdep.c
+++ b/gdb/arm-linux-tdep.c
@@ -686,6 +686,21 @@ arm_linux_collect_vfp (const struct regset *regset,
 			    regs + (regno - ARM_D0_REGNUM) * 8);
 }
 
+static const struct regset arm_linux_gregset =
+  {
+    NULL, arm_linux_supply_gregset, arm_linux_collect_gregset
+  };
+
+static const struct regset arm_linux_fpregset =
+  {
+    NULL, arm_linux_supply_nwfpe, arm_linux_collect_nwfpe
+  };
+
+static const struct regset arm_linux_vfpregset =
+  {
+    NULL, arm_linux_supply_vfp, arm_linux_collect_vfp
+  };
+
 /* Return the appropriate register set for the core section identified
    by SECT_NAME and SECT_SIZE.  */
 
@@ -693,34 +708,17 @@ static const struct regset *
 arm_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 == ARM_LINUX_SIZEOF_GREGSET)
-    {
-      if (tdep->gregset == NULL)
-        tdep->gregset = regset_alloc (gdbarch, arm_linux_supply_gregset,
-                                      arm_linux_collect_gregset);
-      return tdep->gregset;
-    }
+    return &arm_linux_gregset;
 
   if (strcmp (sect_name, ".reg2") == 0
       && sect_size == ARM_LINUX_SIZEOF_NWFPE)
-    {
-      if (tdep->fpregset == NULL)
-        tdep->fpregset = regset_alloc (gdbarch, arm_linux_supply_nwfpe,
-                                       arm_linux_collect_nwfpe);
-      return tdep->fpregset;
-    }
+    return &arm_linux_fpregset;
 
   if (strcmp (sect_name, ".reg-arm-vfp") == 0
       && sect_size == ARM_LINUX_SIZEOF_VFP)
-    {
-      if (tdep->vfpregset == NULL)
-        tdep->vfpregset = regset_alloc (gdbarch, arm_linux_supply_vfp,
-					arm_linux_collect_vfp);
-      return tdep->vfpregset;
-    }
+    return &arm_linux_vfpregset;
 
   return NULL;
 }
diff --git a/gdb/arm-tdep.h b/gdb/arm-tdep.h
index f8ba122..29669d0 100644
--- a/gdb/arm-tdep.h
+++ b/gdb/arm-tdep.h
@@ -193,9 +193,6 @@ struct gdbarch_tdep
   /* Convention for returning structures.  */
   enum struct_return struct_return;
 
-  /* Cached core file helpers.  */
-  struct regset *gregset, *fpregset, *vfpregset;
-
   /* ISA-specific data types.  */
   struct type *arm_ext_type;
   struct type *neon_double_type;
-- 
1.8.4.2