Convert amd64-linux target descriptions

This patch changes amd64-linux target descriptions so that they can be
dynamically generated in both GDB and GDBserver.

gdb/gdbserver:

2017-09-05  Yao Qi  <yao.qi@linaro.org>

	* Makefile.in (arch-amd64.o): New rule.
	* configure.srv: Append arch-amd64.o.
	* linux-amd64-ipa.c: Include common/x86-xstate.h.
	(get_ipa_tdesc): Call amd64_linux_read_description.
	(initialize_low_tracepoint): Don't call init_registers_x32_XXX
	and init_registers_amd64_XXX.
	* linux-x86-low.c (x86_linux_read_description): Call
	amd64_linux_read_description.
	(x86_get_ipa_tdesc_idx): Call amd64_get_ipa_tdesc_idx.
	(initialize_low_arch): Don't call init_registers_x32_XXX and
	init_registers_amd64_XXX.
	* linux-x86-tdesc-selftest.c: Declare init_registers_amd64_XXX
	and tdesc_amd64_XXX.
	[__x86_64__] (amd64_tdesc_test): New function.
	(initialize_low_tdesc) [__x86_64__]: Call init_registers_x32_XXX
	and init_registers_amd64_XXX.
	* linux-x86-tdesc.c: Include arch/amd64.h.
	(xcr0_to_tdesc_idx): New function.
	(i386_linux_read_description): New function.
	(amd64_get_ipa_tdesc_idx): New function.
	* linux-x86-tdesc.h (amd64_get_ipa_tdesc_idx): Declare.
	(amd64_get_ipa_tdesc): Declare.

gdb:

2017-09-05  Yao Qi  <yao.qi@linaro.org>

	* amd64-linux-tdep.c: Include arch/amd64.h.  Don't include
	features/i386/*.c.
	(amd64_linux_read_description): Call
	amd64_create_target_description.
	* arch/amd64.c: New file.
	* arch/amd64.h: New file.
	* configure.tgt (x86_64-*-linux*): Append amd64.o.
	* Makefile.in (ALL_64_TARGET_OBS): Append amd64.o.

2 files changed, 92 insertions, 0 deletions

diff --git a/gdb/arch/amd64.c b/gdb/arch/amd64.c
new file mode 100644
index 0000000..626733d
--- /dev/null
+++ b/gdb/arch/amd64.c
@@ -0,0 +1,71 @@
+/* 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 "amd64.h"
+#include "x86-xstate.h"
+#include <stdlib.h>
+
+#include "../features/i386/64bit-avx.c"
+#include "../features/i386/64bit-avx512.c"
+#include "../features/i386/64bit-core.c"
+#include "../features/i386/64bit-linux.c"
+#include "../features/i386/64bit-mpx.c"
+#include "../features/i386/64bit-pkeys.c"
+#include "../features/i386/64bit-segments.c"
+#include "../features/i386/64bit-sse.c"
+
+#include "../features/i386/x32-core.c"
+
+/* Create amd64 target descriptions according to XCR0.  If IS_X32 is
+   true, create the x32 ones.  */
+
+target_desc *
+amd64_create_target_description (uint64_t xcr0, bool is_x32)
+{
+  target_desc *tdesc = allocate_target_description ();
+
+#ifndef IN_PROCESS_AGENT
+  set_tdesc_architecture (tdesc, is_x32 ? "i386:x64-32" : "i386:x86-64");
+
+  set_tdesc_osabi (tdesc, "GNU/Linux");
+#endif
+
+  long regnum = 0;
+
+  if (is_x32)
+    regnum = create_feature_i386_x32_core (tdesc, regnum);
+  else
+    regnum = create_feature_i386_64bit_core (tdesc, regnum);
+
+  regnum = create_feature_i386_64bit_sse (tdesc, regnum);
+  regnum = create_feature_i386_64bit_linux (tdesc, regnum);
+  regnum = create_feature_i386_64bit_segments (tdesc, regnum);
+
+  if (xcr0 & X86_XSTATE_AVX)
+    regnum = create_feature_i386_64bit_avx (tdesc, regnum);
+
+  if ((xcr0 & X86_XSTATE_MPX) && !is_x32)
+    regnum = create_feature_i386_64bit_mpx (tdesc, regnum);
+
+  if (xcr0 & X86_XSTATE_AVX512)
+    regnum = create_feature_i386_64bit_avx512 (tdesc, regnum);
+
+  if ((xcr0 & X86_XSTATE_PKRU) && !is_x32)
+    regnum = create_feature_i386_64bit_pkeys (tdesc, regnum);
+
+  return tdesc;
+}
diff --git a/gdb/arch/amd64.h b/gdb/arch/amd64.h
new file mode 100644
index 0000000..0821a7c
--- /dev/null
+++ b/gdb/arch/amd64.h
@@ -0,0 +1,21 @@
+/* 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 "tdesc.h"
+#include <stdint.h>
+
+target_desc *amd64_create_target_description (uint64_t xcr0, bool is_x32);