gdbserver: add aarch64_create_target_description

gdbserver/
	* configure.srv: Add new files.
	* linux-aarch64-ipa.c (get_ipa_tdesc): Call
	aarch64_linux_read_description.
	* linux-aarch64-low.c (aarch64_linux_read_description):
	Merge with aarch64_arch_setup.
	(aarch64_arch_setup): Call aarch64_linux_read_description.
	* linux-aarch64-tdesc.c: New file.
	* linux-aarch64-tdesc.h: New file.

6 files changed, 85 insertions, 20 deletions

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 03d4ad7628f..90680555fdd 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,14 @@
+2017-11-24  Alan Hayward  <alan.hayward@arm.com>
+
+	* configure.srv: Add new files.
+	* linux-aarch64-ipa.c (get_ipa_tdesc): Call
+	aarch64_linux_read_description.
+	* linux-aarch64-low.c (aarch64_linux_read_description):
+	Merge with aarch64_arch_setup.
+	(aarch64_arch_setup): Call aarch64_linux_read_description.
+	* linux-aarch64-tdesc.c: New file.
+	* linux-aarch64-tdesc.h: New file.
+
 2017-11-24  Yao Qi  <yao.qi@linaro.org>
 
 	* configure.srv: Set $srv_regobj for tic6x-linux.
diff --git a/gdb/gdbserver/configure.srv b/gdb/gdbserver/configure.srv
index f5fa5e6a461..14967ff5249 100644
--- a/gdb/gdbserver/configure.srv
+++ b/gdb/gdbserver/configure.srv
@@ -50,13 +50,17 @@ srv_linux_obj="linux-low.o linux-osdata.o linux-procfs.o linux-ptrace.o linux-wa
 
 case "${target}" in
   aarch64*-*-linux*)
-			srv_regobj="aarch64.o"
-			srv_regobj="${srv_regobj} arm-with-neon.o"
+			srv_regobj="arm-with-neon.o"
+			if $development; then
+			  srv_regobj="${srv_regobj} aarch64.o"
+                        fi
 			srv_tgtobj="linux-aarch64-low.o aarch64-linux-hw-point.o"
 			srv_tgtobj="$srv_tgtobj linux-aarch32-low.o"
 			srv_tgtobj="${srv_tgtobj} arch/arm.o"
 			srv_tgtobj="$srv_tgtobj aarch64-linux.o"
 			srv_tgtobj="$srv_tgtobj arch/aarch64-insn.o"
+			srv_tgtobj="$srv_tgtobj arch/aarch64.o"
+			srv_tgtobj="$srv_tgtobj linux-aarch64-tdesc.o"
 			srv_tgtobj="${srv_tgtobj} $srv_linux_obj"
 			srv_xmlfiles="aarch64.xml"
 			srv_xmlfiles="${srv_xmlfiles} aarch64-core.xml"
@@ -65,7 +69,9 @@ case "${target}" in
 			srv_xmlfiles="${srv_xmlfiles} arm/arm-with-neon.xml"
 			srv_linux_regsets=yes
 			srv_linux_thread_db=yes
-			ipa_obj="linux-aarch64-ipa.o aarch64-ipa.o"
+			ipa_obj="linux-aarch64-ipa.o"
+			ipa_obj="${ipa_obj} linux-aarch64-tdesc-ipa.o"
+			ipa_obj="${ipa_obj} arch/aarch64-ipa.o"
 			;;
   arm*-*-linux*)	srv_regobj="reg-arm.o arm-with-iwmmxt.o"
 			srv_regobj="${srv_regobj} arm-with-vfpv2.o"
diff --git a/gdb/gdbserver/linux-aarch64-ipa.c b/gdb/gdbserver/linux-aarch64-ipa.c
index ad1059029bb..28dc9776a1c 100644
--- a/gdb/gdbserver/linux-aarch64-ipa.c
+++ b/gdb/gdbserver/linux-aarch64-ipa.c
@@ -25,10 +25,10 @@
 #ifdef HAVE_GETAUXVAL
 #include <sys/auxv.h>
 #endif
+#include "linux-aarch64-tdesc.h"
 
 /* Defined in auto-generated file aarch64.c.  */
 void init_registers_aarch64 (void);
-extern const struct target_desc *tdesc_aarch64;
 
 /* Each register saved by the jump pad is in a 16 byte cell.  */
 #define FT_CR_SIZE 16
@@ -155,7 +155,7 @@ get_raw_reg (const unsigned char *raw_regs, int regnum)
 const struct target_desc *
 get_ipa_tdesc (int idx)
 {
-  return tdesc_aarch64;
+  return aarch64_linux_read_description ();
 }
 
 /* Allocate buffer for the jump pads.  The branch instruction has a reach
diff --git a/gdb/gdbserver/linux-aarch64-low.c b/gdb/gdbserver/linux-aarch64-low.c
index b00d5c502d2..dcce287974c 100644
--- a/gdb/gdbserver/linux-aarch64-low.c
+++ b/gdb/gdbserver/linux-aarch64-low.c
@@ -39,10 +39,10 @@
 
 #include "gdb_proc_service.h"
 #include "arch/aarch64.h"
+#include "linux-aarch64-tdesc.h"
 
 /* Defined in auto-generated files.  */
 void init_registers_aarch64 (void);
-extern const struct target_desc *tdesc_aarch64;
 
 #ifdef HAVE_SYS_REG_H
 #include <sys/reg.h>
@@ -467,11 +467,10 @@ aarch64_linux_new_fork (struct process_info *parent,
   *child->priv->arch_private = *parent->priv->arch_private;
 }
 
-/* Return the right target description according to the ELF file of
-   current thread.  */
+/* Implementation of linux_target_ops method "arch_setup".  */
 
-static const struct target_desc *
-aarch64_linux_read_description (void)
+static void
+aarch64_arch_setup (void)
 {
   unsigned int machine;
   int is_elf64;
@@ -482,17 +481,9 @@ aarch64_linux_read_description (void)
   is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine);
 
   if (is_elf64)
-    return tdesc_aarch64;
+    current_process ()->tdesc = aarch64_linux_read_description ();
   else
-    return tdesc_arm_with_neon;
-}
-
-/* Implementation of linux_target_ops method "arch_setup".  */
-
-static void
-aarch64_arch_setup (void)
-{
-  current_process ()->tdesc = aarch64_linux_read_description ();
+    current_process ()->tdesc = tdesc_arm_with_neon;
 
   aarch64_linux_get_debug_reg_capacity (lwpid_of (current_thread));
 }
diff --git a/gdb/gdbserver/linux-aarch64-tdesc.c b/gdb/gdbserver/linux-aarch64-tdesc.c
new file mode 100644
index 00000000000..8518ef73389
--- /dev/null
+++ b/gdb/gdbserver/linux-aarch64-tdesc.c
@@ -0,0 +1,37 @@
+/* GNU/Linux/aarch64 specific target description, for the remote server
+   for GDB.
+   Copyright (C) 2017 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/aarch64.h"
+#include "linux-aarch32-low.h"
+
+/* Create the aarch64 target description.  */
+
+const target_desc *
+aarch64_linux_read_description ()
+{
+  static target_desc *aarch64_tdesc = NULL;
+  target_desc **tdesc = &aarch64_tdesc;
+
+  if (*tdesc == NULL)
+    *tdesc = aarch64_create_target_description ();
+
+  return *tdesc;
+}
diff --git a/gdb/gdbserver/linux-aarch64-tdesc.h b/gdb/gdbserver/linux-aarch64-tdesc.h
new file mode 100644
index 00000000000..6d6731720c3
--- /dev/null
+++ b/gdb/gdbserver/linux-aarch64-tdesc.h
@@ -0,0 +1,20 @@
+/* Low level support for aarch64, shared between gdbserver and IPA.
+
+   Copyright (C) 2016-2017 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/>.  */
+
+const target_desc * aarch64_linux_read_description ();