Add procfs support for Alpha OSF/1-2.x.

* config/alpha/nm-osf.h:  Renamed from nm-alpha.h, generic
	OSF/1 native support.
	* config/alpha/alpha-osf1.mh (NAT_FILE):  Changed accordingly.
	(MUNCH_DEFINE):  Removed.
	* config/alpha/alpha-osf2.mh, config/alpha/nm-osf2.h:  New files
	for procfs support.

gdb/config/alpha/.Sanitize

@@ -23,9 +23,11 @@ Things-to-keep:
 
 alpha-osf1.mh
 alpha-osf1.mt
+alpha-osf2.mh
 alpha-nw.mt
 gdbserve.mt
-nm-alpha.h
+nm-osf.h
+nm-osf2.h
 tm-alpha.h
 tm-alphanw.h
 xm-alpha.h

gdb/config/alpha/alpha-osf2.mh

@@ -0,0 +1,8 @@
+# Host: Little-endian Alpha running OSF/1-2.x und higher using procfs
+XDEPFILES= 
+XM_FILE= xm-alpha.h
+NAT_FILE= nm-osf2.h
+NATDEPFILES= infptrace.o inftarg.o corelow.o alpha-nat.o fork-child.o osfsolib.o procfs.o
+
+MMALLOC = 
+MMALLOC_DISABLE = -DNO_MMALLOC 

gdb/config/alpha/nm-osf.h

@@ -1,5 +1,5 @@
 /* Native definitions for alpha running OSF/1.
-   Copyright (C) 1993 Free Software Foundation, Inc.
+   Copyright (C) 1993, 1994 Free Software Foundation, Inc.
 
 This file is part of GDB.
 

gdb/config/alpha/nm-osf2.h

@@ -0,0 +1,34 @@
+/* Native definitions for alpha running OSF/1-2.x and higher, using procfs.
+   Copyright (C) 1995 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 2 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, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Get generic OSF/1 definitions.  */
+#include "alpha/nm-osf.h"
+
+/* OSF/1-2.x has optional /proc support, try to use it instead of ptrace.  */
+#define USE_PROC_FS
+#define HAVE_OPTIONAL_PROC_FS
+
+/* OSF/1 doesn't provide the standard fault definitions, so don't use them.  */
+#define FAULTED_USE_SIGINFO
+
+/* Work around some peculiarities in the OSF/1 procfs implementation.  */
+#define PROCFS_DONT_TRACE_IFAULT
+#define PROCFS_SIGPEND_OFFSET
+#define PROCFS_NEED_PIOCSSIG_FOR_KILL
+#define PROCFS_DONT_PIOCSSIG_CURSIG