Move shared native target specific code to gdb/nat

https://sourceware.org/gdb/wiki/Common describes the following
directory structure:

 gdb/nat/
   Native target backend files. Code that interfaces with the
   host debug API. E.g., ptrace code, Windows debug API code,
   procfs code should go here.

 gdb/target/
   Host-independent, target vector specific code (target_ops).

 gdb/common/
   All other shared code.

This commit moves all native target backend files currently in
gdb/common to gdb/nat.

gdb/
2014-06-20  Gary Benson  <gbenson@redhat.com>

	* common/gdb_thread_db.h: Moved to nat.  All includes updated.
	* common/glibc_thread_db.h: Likewise.
	* common/i386-cpuid.h: Likewise.
	* common/i386-gcc-cpuid.h: Likewise.
	* common/linux-btrace.h: Likewise.
	* common/linux-osdata.h: Likewise.
	* common/linux-procfs.h: Likewise.
	* common/linux-ptrace.h: Likewise.
	* common/mips-linux-watch.h: Likewise.
	* common/linux-btrace.c: Moved to nat.
	* common/linux-osdata.c: Likewise.
	* common/linux-procfs.c: Likewise.
	* common/linux-ptrace.c: Likewise.
	* common/mips-linux-watch.c: Likewise.
	* nat/gdb_thread_db.h: Moved from common.
	* nat/glibc_thread_db.h: Likewise.
	* nat/i386-cpuid.h: Likewise.
	* nat/i386-gcc-cpuid.h: Likewise.
	* nat/linux-btrace.c: Likewise.
	* nat/linux-btrace.h: Likewise.
	* nat/linux-osdata.c: Likewise.
	* nat/linux-osdata.h: Likewise.
	* nat/linux-procfs.c: Likewise.
	* nat/linux-procfs.h: Likewise.
	* nat/linux-ptrace.c: Likewise.
	* nat/linux-ptrace.h: Likewise.
	* nat/mips-linux-watch.c: Likewise.
	* nat/mips-linux-watch.h: Likewise.
	* Makefile.in (HFILES_NO_SRCDIR): Reflect new locations.
	(object file files): Reordered.
	* gdb/copyright.py (EXCLUDE_LIST): Reflect new location
	of glibc_thread_db.h.

gdb/gdbserver/
2014-06-20  Gary Benson  <gbenson@redhat.com>

	* Makefile.in (SFILES): Update locations for files moved
	from common to nat.
	(object file files): Reordered.

gdb/testsuite/
2014-06-20  Gary Benson  <gbenson@redhat.com>

	* gdb.arch/i386-avx.exp: Fix include file location.
	* gdb.arch/i386-sse.exp: Likewise.

1 files changed, 78 insertions, 0 deletions

diff --git a/gdb/nat/linux-btrace.h b/gdb/nat/linux-btrace.h
new file mode 100644
index 0000000..12e9b60
--- /dev/null
+++ b/gdb/nat/linux-btrace.h
@@ -0,0 +1,78 @@
+/* Linux-dependent part of branch trace support for GDB, and GDBserver.
+
+   Copyright (C) 2013-2014 Free Software Foundation, Inc.
+
+   Contributed by Intel Corp. <markus.t.metzger@intel.com>
+
+   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/>.  */
+
+#ifndef LINUX_BTRACE_H
+#define LINUX_BTRACE_H
+
+#include "btrace-common.h"
+#include "config.h"
+#include "vec.h"
+#include "ptid.h"
+#include <stddef.h>
+#include <stdint.h>
+
+#if HAVE_LINUX_PERF_EVENT_H
+#  include <linux/perf_event.h>
+#endif
+
+/* Branch trace target information per thread.  */
+struct btrace_target_info
+{
+#if HAVE_LINUX_PERF_EVENT_H
+  /* The Linux perf_event configuration for collecting the branch trace.  */
+  struct perf_event_attr attr;
+
+  /* The ptid of this thread.  */
+  ptid_t ptid;
+
+  /* The mmap configuration mapping the branch trace perf_event buffer.
+
+     file      .. the file descriptor
+     buffer    .. the mmapped memory buffer
+     size      .. the buffer's size in pages without the configuration page
+     data_head .. the data head from the last read  */
+  int file;
+  void *buffer;
+  size_t size;
+  unsigned long data_head;
+#endif /* HAVE_LINUX_PERF_EVENT_H */
+
+  /* The size of a pointer in bits for this thread.
+     The information is used to identify kernel addresses in order to skip
+     records from/to kernel space.  */
+  int ptr_bits;
+};
+
+/* See to_supports_btrace in target.h.  */
+extern int linux_supports_btrace (struct target_ops *);
+
+/* See to_enable_btrace in target.h.  */
+extern struct btrace_target_info *linux_enable_btrace (ptid_t ptid);
+
+/* See to_disable_btrace in target.h.  */
+extern enum btrace_error linux_disable_btrace (struct btrace_target_info *ti);
+
+/* See to_read_btrace in target.h.  */
+extern enum btrace_error linux_read_btrace (VEC (btrace_block_s) **btrace,
+					    struct btrace_target_info *btinfo,
+					    enum btrace_read_type type);
+
+#endif /* LINUX_BTRACE_H */