gdb/

* Makefile.in (linux-ptrace.o): New.
	* common/linux-procfs.c (linux_proc_pid_is_zombie): New,
	from linux-nat.c.
	* common/linux-procfs.h (linux_proc_pid_is_zombie): New declaration.
	* common/linux-ptrace.c: New file.
	* config/alpha/alpha-linux.mh (NATDEPFILES): Add linux-ptrace.o.
	* config/arm/linux.mh: Likewise.
	* config/i386/linux.mh: Likewise.
	* config/i386/linux64.mh: Likewise.
	* config/ia64/linux.mh: Likewise.
	* config/m32r/linux.mh: Likewise.
	* config/m68k/linux.mh: Likewise.
	* config/mips/linux.mh: Likewise.
	* config/pa/linux.mh: Likewise.
	* config/powerpc/linux.mh: Likewise.
	* config/powerpc/ppc64-linux.mh: Likewise.
	* config/powerpc/spu-linux.mh: Likewise.
	* config/s390/s390.mh: Likewise.
	* config/sparc/linux.mh: Likewise.
	* config/sparc/linux64.mh: Likewise.
	* config/xtensa/linux.mh: Likewise.
	* linux-nat.c (linux_lwp_is_zombie): Remove, move it to
	common/linux-procfs.c.
	(wait_lwp): Rename linux_lwp_is_zombie to linux_proc_pid_is_zombie.

gdb/gdbserver/
	* Makefile.in (linux-ptrace.o): New.
	* configure.srv (arm*-*-linux*, bfin-*-*linux*, crisv32-*-linux*)
	(cris-*-linux*, i[34567]86-*-linux*, ia64-*-linux*, m32r*-*-linux*)
	(m68*-*-linux*, m68*-*-uclinux*, mips*-*-linux*, powerpc*-*-linux*)
	(s390*-*-linux*, sh*-*-linux*, sparc*-*-linux*, tic6x-*-uclinux)
	(x86_64-*-linux*, xtensa*-*-linux*): Add linux-ptrace.o to SRV_TGTOBJ
	of these targets.
	* linux-low.c (linux_attach_lwp_1): Remove redundent else clause.

gdb/common/linux-procfs.c

@@ -84,3 +84,34 @@ linux_proc_pid_is_stopped (pid_t pid)
     }
   return retval;
 }
+
+/* See linux-procfs.h declaration.  */
+
+int
+linux_proc_pid_is_zombie (pid_t pid)
+{
+  char buffer[100];
+  FILE *procfile;
+  int retval;
+  int have_state;
+
+  xsnprintf (buffer, sizeof (buffer), "/proc/%d/status", (int) pid);
+  procfile = fopen (buffer, "r");
+  if (procfile == NULL)
+    {
+      warning (_("unable to open /proc file '%s'"), buffer);
+      return 0;
+    }
+
+  have_state = 0;
+  while (fgets (buffer, sizeof (buffer), procfile) != NULL)
+    if (strncmp (buffer, "State:", 6) == 0)
+      {
+	have_state = 1;
+	break;
+      }
+  retval = (have_state
+	    && strcmp (buffer, "State:\tZ (zombie)\n") == 0);
+  fclose (procfile);
+  return retval;
+}

gdb/common/linux-procfs.h

@@ -31,4 +31,8 @@ extern int linux_proc_get_tgid (int lwpid);
 
 extern int linux_proc_pid_is_stopped (pid_t pid);
 
+/* Return non-zero if PID is a zombie.  */
+
+extern int linux_proc_pid_is_zombie (pid_t pid);
+
 #endif /* COMMON_LINUX_PROCFS_H */

gdb/common/linux-ptrace.c

@@ -0,0 +1,26 @@
+/* Linux-specific ptrace manipulation routines.
+   Copyright (C) 2012 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/>.  */
+
+#ifdef GDBSERVER
+#include "server.h"
+#else
+#include "defs.h"
+#include "gdb_string.h"
+#endif
+
+#include "linux-ptrace.h"