Arm: Use read_description funcs in gdbserver

Switch gdbserver over to using feature target descriptions.

Add a function for determining the type of a given target description,
and use where required.

gdb/gdbserver/ChangeLog:

	* configure.srv: Add new files. Remove xml generated files.
	* linux-aarch32-low.c (initialize_low_arch_aarch32): Don't init
	registers.
	* linux-aarch32-low.h (tdesc_arm_with_neon): Remove.
	* linux-aarch32-tdesc.c: New file.
	* linux-aarch32-tdesc.h: New file.
	* linux-aarch64-low.c (aarch64_arch_setup): Call aarch32_linux_read_description.
	* linux-arm-low.c (init_registers_arm, tdesc_arm)
	(init_registers_arm_with_iwmmxt, tdesc_arm_with_iwmmxt)
	(init_registers_arm_with_vfpv2, tdesc_arm_with_vfpv2)
	(init_registers_arm_with_vfpv3, tdesc_arm_with_vfpv3): Remove.
	(arm_fill_wmmxregset, arm_store_wmmxregset, arm_fill_vfpregset)
	(arm_store_vfpregset): Call arm_linux_get_tdesc_fp_type.
	(arm_read_description): Call arm_linux_read_description.
	(initialize_low_arch): Don't init registers.
	* linux-arm-tdesc.c: New file.
	* linux-arm-tdesc.h: New file.

1 files changed, 62 insertions, 0 deletions

diff --git a/gdb/gdbserver/linux-arm-tdesc.c b/gdb/gdbserver/linux-arm-tdesc.c
new file mode 100644
index 0000000..cdc4dab
--- /dev/null
+++ b/gdb/gdbserver/linux-arm-tdesc.c
@@ -0,0 +1,62 @@
+/* Copyright (C) 2019 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "server.h"
+#include "tdesc.h"
+#include "arch/arm.h"
+#include <inttypes.h>
+
+/* All possible Arm target descriptors.  */
+static struct target_desc *tdesc_arm_list[ARM_FP_TYPE_INVALID];
+
+/* See linux-arm-tdesc.h.  */
+
+const target_desc *
+arm_linux_read_description (arm_fp_type fp_type)
+{
+  struct target_desc *tdesc = tdesc_arm_list[fp_type];
+
+  if (tdesc == nullptr)
+    {
+      tdesc = arm_create_target_description (fp_type);
+
+      static const char *expedite_regs[] = { "r11", "sp", "pc", 0 };
+      init_target_desc (tdesc, expedite_regs);
+
+      tdesc_arm_list[fp_type] = tdesc;
+    }
+
+  return tdesc;
+}
+
+/* See linux-arm-tdesc.h.  */
+
+arm_fp_type
+arm_linux_get_tdesc_fp_type (const target_desc *tdesc)
+{
+  gdb_assert (tdesc != nullptr);
+
+  /* Many of the tdesc_arm_list entries may not have been initialised yet.  This
+     is ok, because tdesc must be one of the initialised ones.  */
+  for (int i = ARM_FP_TYPE_NONE; i < ARM_FP_TYPE_INVALID; i++)
+    {
+      if (tdesc == tdesc_arm_list[i])
+	return (arm_fp_type) i;
+    }
+
+  return ARM_FP_TYPE_INVALID;
+}