Arm: Use feature target descriptions

In arm arm_create_target_description and
aarch32_create_target_description create feature based target descriptions
instead of returning the old style descriptions.

Ensure the descriptions are created in exactly the same way as the old xml
files.

Remove the old initialize calls.

gdb/ChangeLog:

	* arch/aarch32.c (aarch32_create_target_description): Create
	target descriptions using features.
	* arch/arm.c (arm_create_target_description)
	(arm_create_mprofile_target_description): Likewise.
	* arm-tdep.c (_initialize_arm_tdep): Remove tdesc init calls.

gdb/ChangeLog

@@ -1,3 +1,11 @@
+2019-07-19  Alan Hayward  <alan.hayward@arm.com>
+
+	* arch/aarch32.c (aarch32_create_target_description): Create
+	target descriptions using features.
+	* arch/arm.c (arm_create_target_description)
+	(arm_create_mprofile_target_description): Likewise.
+	* arm-tdep.c (_initialize_arm_tdep): Remove tdesc init calls.
+
 2019-07-19  Alan Hayward  <alan.hayward@arm.com>
 
 	* Makefile.in: Add new files.

gdb/arch/aarch32.c

@@ -18,12 +18,26 @@
 #include "gdbsupport/common-defs.h"
 #include "aarch32.h"
 
-extern struct target_desc *tdesc_arm_with_neon;
+#include "../features/arm/arm-core.c"
+#include "../features/arm/arm-vfpv3.c"
 
 /* See aarch32.h.  */
 
 target_desc *
 aarch32_create_target_description ()
 {
-  return tdesc_arm_with_neon;
+  target_desc *tdesc = allocate_target_description ();
+
+#ifndef IN_PROCESS_AGENT
+  set_tdesc_architecture (tdesc, "arm");
+#endif
+
+  long regnum = 0;
+
+  regnum = create_feature_arm_arm_core (tdesc, regnum);
+  /* Create a vfpv3 feature, then a blank NEON feature.  */
+  regnum = create_feature_arm_arm_vfpv3 (tdesc, regnum);
+  tdesc_create_feature (tdesc, "org.gnu.gdb.arm.neon");
+
+  return tdesc;
 }

gdb/arch/arm.c

@@ -21,16 +21,12 @@
 #include "gdbsupport/common-regcache.h"
 #include "arm.h"
 
-extern struct target_desc *tdesc_arm_with_vfpv2;
+#include "../features/arm/arm-core.c"
-extern struct target_desc *tdesc_arm_with_vfpv3;
+#include "../features/arm/arm-vfpv2.c"
-extern struct target_desc *tdesc_arm_with_iwmmxt;
+#include "../features/arm/arm-vfpv3.c"
-
+#include "../features/arm/xscale-iwmmxt.c"
-/* Temporary ifdef.  Will be removed when target descriptions are switched.  */
+#include "../features/arm/arm-m-profile.c"
-#ifndef GDBSERVER
+#include "../features/arm/arm-m-profile-with-fpa.c"
-extern struct target_desc *tdesc_arm_with_m;
-extern struct target_desc *tdesc_arm_with_m_vfp_d16;
-extern struct target_desc *tdesc_arm_with_m_fpa_layout;
-#endif
 
 /* See arm.h.  */
 
@@ -389,24 +385,41 @@ shifted_reg_val (struct regcache *regcache, unsigned long inst,
 target_desc *
 arm_create_target_description (arm_fp_type fp_type)
 {
+  target_desc *tdesc = allocate_target_description ();
+
+#ifndef IN_PROCESS_AGENT
+  if (fp_type == ARM_FP_TYPE_IWMMXT)
+    set_tdesc_architecture (tdesc, "iwmmxt");
+  else
+    set_tdesc_architecture (tdesc, "arm");
+#endif
+
+  long regnum = 0;
+
+  regnum = create_feature_arm_arm_core (tdesc, regnum);
+
   switch (fp_type)
     {
     case ARM_FP_TYPE_NONE:
-      return nullptr;
+      break;
-/* Temporary ifdef.  Will be removed when target descriptions are switched.  */
+
-#ifndef GDBSERVER
     case ARM_FP_TYPE_VFPV2:
-      return tdesc_arm_with_vfpv2;
+      regnum = create_feature_arm_arm_vfpv2 (tdesc, regnum);
+      break;
 
     case ARM_FP_TYPE_VFPV3:
-      return tdesc_arm_with_vfpv3;
+      regnum = create_feature_arm_arm_vfpv3 (tdesc, regnum);
+      break;
 
     case ARM_FP_TYPE_IWMMXT:
-      return tdesc_arm_with_iwmmxt;
+      regnum = create_feature_arm_xscale_iwmmxt (tdesc, regnum);
-#endif
+      break;
+
     default:
       error (_("Invalid Arm FP type: %d"), fp_type);
     }
+
+  return tdesc;
 }
 
 /* See arch/arm.h.  */
@@ -414,21 +427,32 @@ arm_create_target_description (arm_fp_type fp_type)
 target_desc *
 arm_create_mprofile_target_description (arm_m_profile_type m_type)
 {
+  target_desc *tdesc = allocate_target_description ();
+
+#ifndef IN_PROCESS_AGENT
+  set_tdesc_architecture (tdesc, "arm");
+#endif
+
+  long regnum = 0;
+
   switch (m_type)
     {
-/* Temporary ifdef.  Will be removed when target descriptions are switched.  */
-#ifndef GDBSERVER
     case ARM_M_TYPE_M_PROFILE:
-      return tdesc_arm_with_m;
+      regnum = create_feature_arm_arm_m_profile (tdesc, regnum);
+      break;
 
     case ARM_M_TYPE_VFP_D16:
-      return tdesc_arm_with_m_fpa_layout;
+      regnum = create_feature_arm_arm_m_profile (tdesc, regnum);
+      regnum = create_feature_arm_arm_vfpv2 (tdesc, regnum);
+      break;
 
     case ARM_M_TYPE_WITH_FPA:
-      return tdesc_arm_with_m_vfp_d16;
+      regnum = create_feature_arm_arm_m_profile_with_fpa (tdesc, regnum);
-#endif
+      break;
+
     default:
       error (_("Invalid Arm M type: %d"), m_type);
     }
-}
 
+  return tdesc;
+}

gdb/arm-tdep.c

@@ -61,14 +61,6 @@
 #include "record-full.h"
 #include <algorithm>
 
-#include "features/arm/arm-with-m.c"
-#include "features/arm/arm-with-m-fpa-layout.c"
-#include "features/arm/arm-with-m-vfp-d16.c"
-#include "features/arm/arm-with-iwmmxt.c"
-#include "features/arm/arm-with-vfpv2.c"
-#include "features/arm/arm-with-vfpv3.c"
-#include "features/arm/arm-with-neon.c"
-
 #if GDB_SELF_TEST
 #include "gdbsupport/selftest.h"
 #endif
@@ -9451,15 +9443,6 @@ _initialize_arm_tdep (void)
 				  bfd_target_elf_flavour,
 				  arm_elf_osabi_sniffer);
 
-  /* Initialize the standard target descriptions.  */
-  initialize_tdesc_arm_with_m ();
-  initialize_tdesc_arm_with_m_fpa_layout ();
-  initialize_tdesc_arm_with_m_vfp_d16 ();
-  initialize_tdesc_arm_with_iwmmxt ();
-  initialize_tdesc_arm_with_vfpv2 ();
-  initialize_tdesc_arm_with_vfpv3 ();
-  initialize_tdesc_arm_with_neon ();
-
   /* Add root prefix command for all "set arm"/"show arm" commands.  */
   add_prefix_cmd ("arm", no_class, set_arm_command,
 		  _("Various ARM-specific commands."),