http://sourceware.org/ml/gdb-patches/2012-03/msg00169.html
Subject: [patch 1/3] attach-fail-reasons: Reshuffle code

Hi,

this patch does not make sense on its own but it contains all the
uninteresting code moves / reconfigurations.


Thanks,
Jan


gdb/
2012-03-06  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* 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/
2012-03-06  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* 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.

Index: gdb-7.4.50.20120120/gdb/Makefile.in
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/Makefile.in	2012-03-06 07:39:41.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/Makefile.in	2012-03-06 07:39:50.771713128 +0100
@@ -1968,6 +1968,10 @@ linux-procfs.o: $(srcdir)/common/linux-p
 	$(COMPILE) $(srcdir)/common/linux-procfs.c
 	$(POSTCOMPILE)
 
+linux-ptrace.o: $(srcdir)/common/linux-ptrace.c
+	$(COMPILE) $(srcdir)/common/linux-ptrace.c
+	$(POSTCOMPILE)
+
 #
 # gdb/tui/ dependencies
 #
Index: gdb-7.4.50.20120120/gdb/common/linux-procfs.c
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/common/linux-procfs.c	2012-03-06 07:39:41.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/common/linux-procfs.c	2012-03-06 07:39:50.771713128 +0100
@@ -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;
+}
Index: gdb-7.4.50.20120120/gdb/common/linux-procfs.h
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/common/linux-procfs.h	2012-03-06 07:39:41.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/common/linux-procfs.h	2012-03-06 07:39:50.771713128 +0100
@@ -31,4 +31,8 @@ extern int linux_proc_get_tgid (int lwpi
 
 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 */
Index: gdb-7.4.50.20120120/gdb/common/linux-ptrace.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ gdb-7.4.50.20120120/gdb/common/linux-ptrace.c	2012-03-06 07:39:50.771713128 +0100
@@ -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"
Index: gdb-7.4.50.20120120/gdb/config/alpha/alpha-linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/alpha/alpha-linux.mh	2012-01-10 17:30:44.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/alpha/alpha-linux.mh	2012-03-06 07:39:50.771713128 +0100
@@ -2,7 +2,7 @@
 NAT_FILE= config/nm-linux.h
 NATDEPFILES= inf-ptrace.o alpha-linux-nat.o \
 	fork-child.o proc-service.o linux-thread-db.o \
-	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o
+	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 # The dynamically loaded libthread_db needs access to symbols in the
Index: gdb-7.4.50.20120120/gdb/config/arm/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/arm/linux.mh	2011-08-24 14:07:25.000000000 +0200
+++ gdb-7.4.50.20120120/gdb/config/arm/linux.mh	2012-03-06 07:39:50.772713125 +0100
@@ -3,7 +3,7 @@
 NAT_FILE= config/nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o arm-linux-nat.o \
 	proc-service.o linux-thread-db.o \
-	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o
+	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 LOADLIBES= -ldl $(RDYNAMIC)
Index: gdb-7.4.50.20120120/gdb/config/i386/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/i386/linux.mh	2012-03-06 07:39:41.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/i386/linux.mh	2012-03-06 07:39:50.772713125 +0100
@@ -4,7 +4,7 @@ NAT_FILE= nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o \
 	i386-nat.o i386-linux-nat.o \
 	proc-service.o linux-thread-db.o \
-	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o
+	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 # The dynamically loaded libthread_db needs access to symbols in the
Index: gdb-7.4.50.20120120/gdb/config/i386/linux64.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/i386/linux64.mh	2012-03-06 07:39:41.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/i386/linux64.mh	2012-03-06 07:39:50.772713125 +0100
@@ -3,7 +3,7 @@ NATDEPFILES= inf-ptrace.o fork-child.o \
 	i386-nat.o amd64-nat.o amd64-linux-nat.o \
 	linux-nat.o linux-osdata.o \
 	proc-service.o linux-thread-db.o linux-fork.o \
-	linux-procfs.o
+	linux-procfs.o linux-ptrace.o
 NAT_FILE= nm-linux64.h
 NAT_CDEPS = $(srcdir)/proc-service.list
 
Index: gdb-7.4.50.20120120/gdb/config/ia64/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/ia64/linux.mh	2012-01-10 17:30:44.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/ia64/linux.mh	2012-03-06 07:39:50.772713125 +0100
@@ -5,7 +5,7 @@ NATDEPFILES= inf-ptrace.o fork-child.o \
 	core-regset.o ia64-linux-nat.o \
 	proc-service.o linux-thread-db.o \
 	linux-nat.o linux-osdata.o linux-fork.o \
-	linux-procfs.o
+	linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 LOADLIBES = -ldl $(RDYNAMIC)
Index: gdb-7.4.50.20120120/gdb/config/m32r/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/m32r/linux.mh	2012-01-10 17:30:44.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/m32r/linux.mh	2012-03-06 07:39:50.773713122 +0100
@@ -3,7 +3,7 @@
 NAT_FILE= config/nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o				\
 	m32r-linux-nat.o proc-service.o linux-thread-db.o	\
-	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o
+	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 LOADLIBES= -ldl $(RDYNAMIC)
Index: gdb-7.4.50.20120120/gdb/config/m68k/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/m68k/linux.mh	2012-01-10 17:30:45.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/m68k/linux.mh	2012-03-06 07:39:50.773713122 +0100
@@ -4,7 +4,7 @@ NAT_FILE= config/nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o \
 	m68klinux-nat.o \
 	proc-service.o linux-thread-db.o \
-	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o
+	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 # The dynamically loaded libthread_db needs access to symbols in the
Index: gdb-7.4.50.20120120/gdb/config/mips/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/mips/linux.mh	2011-08-24 14:07:26.000000000 +0200
+++ gdb-7.4.50.20120120/gdb/config/mips/linux.mh	2012-03-06 07:39:50.773713122 +0100
@@ -3,7 +3,7 @@ NAT_FILE= config/nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o mips-linux-nat.o \
 	linux-thread-db.o proc-service.o \
 	linux-nat.o linux-osdata.o linux-fork.o \
-	linux-procfs.o
+	linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 LOADLIBES = -ldl $(RDYNAMIC)
Index: gdb-7.4.50.20120120/gdb/config/pa/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/pa/linux.mh	2012-01-10 17:30:45.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/pa/linux.mh	2012-03-06 07:39:50.773713122 +0100
@@ -3,7 +3,7 @@ NAT_FILE= config/nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o \
 	hppa-linux-nat.o proc-service.o linux-thread-db.o \
 	linux-nat.o linux-osdata.o linux-fork.o \
-	linux-procfs.o
+	linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 LOADLIBES = -ldl $(RDYNAMIC)
Index: gdb-7.4.50.20120120/gdb/config/powerpc/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/powerpc/linux.mh	2011-08-24 14:07:27.000000000 +0200
+++ gdb-7.4.50.20120120/gdb/config/powerpc/linux.mh	2012-03-06 07:39:50.773713122 +0100
@@ -5,7 +5,7 @@ XM_CLIBS=
 NAT_FILE= config/nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o \
 	ppc-linux-nat.o proc-service.o linux-thread-db.o \
-	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o
+	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 LOADLIBES = -ldl $(RDYNAMIC)
Index: gdb-7.4.50.20120120/gdb/config/powerpc/ppc64-linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/powerpc/ppc64-linux.mh	2011-08-24 14:07:27.000000000 +0200
+++ gdb-7.4.50.20120120/gdb/config/powerpc/ppc64-linux.mh	2012-03-06 07:39:50.774713118 +0100
@@ -5,7 +5,7 @@ XM_CLIBS=
 NAT_FILE= config/nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o \
 	ppc-linux-nat.o proc-service.o linux-thread-db.o \
-	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o
+	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 # The PowerPC has severe limitations on TOC size, and uses them even
Index: gdb-7.4.50.20120120/gdb/config/powerpc/spu-linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/powerpc/spu-linux.mh	2011-08-24 14:07:27.000000000 +0200
+++ gdb-7.4.50.20120120/gdb/config/powerpc/spu-linux.mh	2012-03-06 07:39:50.774713118 +0100
@@ -4,5 +4,5 @@
 # PPU side of the Cell BE and debugging the SPU side.
 
 NATDEPFILES = spu-linux-nat.o fork-child.o inf-ptrace.o \
-	      linux-procfs.o
+	      linux-procfs.o linux-ptrace.o
 
Index: gdb-7.4.50.20120120/gdb/config/s390/s390.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/s390/s390.mh	2012-01-05 18:07:05.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/s390/s390.mh	2012-03-06 07:39:50.774713118 +0100
@@ -2,6 +2,6 @@
 NAT_FILE= config/nm-linux.h
 NATDEPFILES= inf-ptrace.o fork-child.o s390-nat.o \
 	linux-thread-db.o proc-service.o \
-	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o
+	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 LOADLIBES = -ldl $(RDYNAMIC)
Index: gdb-7.4.50.20120120/gdb/config/sparc/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/sparc/linux.mh	2012-01-10 17:30:49.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/sparc/linux.mh	2012-03-06 07:39:50.774713118 +0100
@@ -4,7 +4,7 @@ NATDEPFILES= sparc-nat.o sparc-linux-nat
 	core-regset.o fork-child.o inf-ptrace.o \
 	proc-service.o linux-thread-db.o \
 	linux-nat.o linux-osdata.o linux-fork.o \
-	linux-procfs.o
+	linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 # The dynamically loaded libthread_db needs access to symbols in the
Index: gdb-7.4.50.20120120/gdb/config/sparc/linux64.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/sparc/linux64.mh	2012-01-10 17:30:49.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/config/sparc/linux64.mh	2012-03-06 07:39:50.775713114 +0100
@@ -5,7 +5,7 @@ NATDEPFILES= sparc-nat.o sparc64-nat.o s
 	fork-child.o inf-ptrace.o \
 	proc-service.o linux-thread-db.o \
 	linux-nat.o linux-osdata.o linux-fork.o \
-	linux-procfs.o
+	linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 # The dynamically loaded libthread_db needs access to symbols in the
Index: gdb-7.4.50.20120120/gdb/config/xtensa/linux.mh
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/config/xtensa/linux.mh	2011-08-24 14:07:27.000000000 +0200
+++ gdb-7.4.50.20120120/gdb/config/xtensa/linux.mh	2012-03-06 07:39:50.775713114 +0100
@@ -4,7 +4,7 @@ NAT_FILE= config/nm-linux.h
 
 NATDEPFILES= inf-ptrace.o fork-child.o xtensa-linux-nat.o \
 	linux-thread-db.o proc-service.o \
-	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o
+	linux-nat.o linux-osdata.o linux-fork.o linux-procfs.o linux-ptrace.o
 NAT_CDEPS = $(srcdir)/proc-service.list
 
 LOADLIBES = -ldl $(RDYNAMIC)
Index: gdb-7.4.50.20120120/gdb/gdbserver/Makefile.in
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/gdbserver/Makefile.in	2012-01-04 09:17:23.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/gdbserver/Makefile.in	2012-03-06 07:39:50.775713114 +0100
@@ -408,6 +408,9 @@ signals.o: ../common/signals.c $(server_
 linux-procfs.o: ../common/linux-procfs.c $(server_h)
 	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $< -DGDBSERVER
 
+linux-ptrace.o: ../common/linux-ptrace.c $(server_h)
+	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $< -DGDBSERVER
+
 common-utils.o: ../common/common-utils.c $(server_h)
 	$(CC) -c $(CPPFLAGS) $(INTERNAL_CFLAGS) $< -DGDBSERVER
 
Index: gdb-7.4.50.20120120/gdb/gdbserver/configure.srv
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/gdbserver/configure.srv	2011-12-06 15:14:49.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/gdbserver/configure.srv	2012-03-06 07:39:50.775713114 +0100
@@ -47,6 +47,7 @@ case "${target}" in
 			srv_regobj="${srv_regobj} arm-with-vfpv3.o"
 			srv_regobj="${srv_regobj} arm-with-neon.o"
 			srv_tgtobj="linux-low.o linux-osdata.o linux-arm-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_xmlfiles="arm-with-iwmmxt.xml"
 			srv_xmlfiles="${srv_xmlfiles} arm-with-vfpv2.xml"
 			srv_xmlfiles="${srv_xmlfiles} arm-with-vfpv3.xml"
@@ -69,16 +70,19 @@ case "${target}" in
 			;;
   bfin-*-*linux*)	srv_regobj=reg-bfin.o
 			srv_tgtobj="linux-low.o linux-osdata.o linux-bfin-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_usrregs=yes
 			srv_linux_thread_db=yes
 			;;
   crisv32-*-linux*)	srv_regobj=reg-crisv32.o
 			srv_tgtobj="linux-low.o linux-osdata.o linux-crisv32-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_regsets=yes
 			srv_linux_thread_db=yes
 			;;
   cris-*-linux*)	srv_regobj=reg-cris.o
 			srv_tgtobj="linux-low.o linux-osdata.o linux-cris-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_usrregs=yes
 			srv_linux_thread_db=yes
 			;;
@@ -93,6 +97,7 @@ case "${target}" in
 			    srv_xmlfiles="${srv_xmlfiles} $srv_amd64_linux_xmlfiles"
 			fi
 			srv_tgtobj="linux-low.o linux-osdata.o linux-x86-low.o i386-low.o i387-fp.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_usrregs=yes
 			srv_linux_regsets=yes
 			srv_linux_thread_db=yes
@@ -124,10 +129,12 @@ case "${target}" in
 			;;
   ia64-*-linux*)	srv_regobj=reg-ia64.o
 			srv_tgtobj="linux-low.o linux-osdata.o linux-ia64-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_usrregs=yes
 			;;
   m32r*-*-linux*)	srv_regobj=reg-m32r.o
 			srv_tgtobj="linux-low.o linux-osdata.o linux-m32r-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_usrregs=yes
  			srv_linux_thread_db=yes
 			;;
@@ -137,6 +144,7 @@ case "${target}" in
                           srv_regobj=reg-m68k.o
                         fi
 			srv_tgtobj="linux-low.o linux-osdata.o linux-m68k-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_usrregs=yes
 			srv_linux_regsets=yes
 			srv_linux_thread_db=yes
@@ -147,12 +155,14 @@ case "${target}" in
                           srv_regobj=reg-m68k.o
                         fi
 			srv_tgtobj="linux-low.o linux-osdata.o linux-m68k-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_usrregs=yes
 			srv_linux_regsets=yes
 			srv_linux_thread_db=yes
 			;;
   mips*-*-linux*)	srv_regobj="mips-linux.o mips64-linux.o"
 			srv_tgtobj="linux-low.o linux-osdata.o linux-mips-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_xmlfiles="mips-linux.xml"
 			srv_xmlfiles="${srv_xmlfiles} mips-cpu.xml"
 			srv_xmlfiles="${srv_xmlfiles} mips-cp0.xml"
@@ -181,6 +191,7 @@ case "${target}" in
 			srv_regobj="${srv_regobj} powerpc-isa205-altivec64l.o"
 			srv_regobj="${srv_regobj} powerpc-isa205-vsx64l.o"
 			srv_tgtobj="linux-low.o linux-osdata.o linux-ppc-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_xmlfiles="rs6000/powerpc-32l.xml"
 			srv_xmlfiles="${srv_xmlfiles} rs6000/powerpc-altivec32l.xml"
 			srv_xmlfiles="${srv_xmlfiles} rs6000/powerpc-cell32l.xml"
@@ -223,6 +234,7 @@ case "${target}" in
 			srv_regobj="${srv_regobj} s390x-linux64v1.o"
 			srv_regobj="${srv_regobj} s390x-linux64v2.o"
 			srv_tgtobj="linux-low.o linux-osdata.o linux-s390-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_xmlfiles="s390-linux32.xml"
 			srv_xmlfiles="${srv_xmlfiles} s390-linux32v1.xml"
 			srv_xmlfiles="${srv_xmlfiles} s390-linux32v2.xml"
@@ -243,12 +255,14 @@ case "${target}" in
 			;;
   sh*-*-linux*)		srv_regobj=reg-sh.o
 			srv_tgtobj="linux-low.o linux-osdata.o linux-sh-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_usrregs=yes
 			srv_linux_regsets=yes
 			srv_linux_thread_db=yes
 			;;
   sparc*-*-linux*)	srv_regobj=reg-sparc64.o
 			srv_tgtobj="linux-low.o linux-osdata.o linux-sparc-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_regsets=yes
 			srv_linux_thread_db=yes
 			;;
@@ -265,12 +279,14 @@ case "${target}" in
 			srv_xmlfiles="${srv_xmlfiles} tic6x-gp.xml"
 			srv_xmlfiles="${srv_xmlfiles} tic6x-c6xp.xml"
   			srv_tgtobj="linux-low.o linux-osdata.o linux-tic6x-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_regsets=yes
 			srv_linux_usrregs=yes
 			srv_linux_thread_db=yes
 			;;
   x86_64-*-linux*)	srv_regobj="$srv_amd64_linux_regobj $srv_i386_linux_regobj"
 			srv_tgtobj="linux-low.o linux-osdata.o linux-x86-low.o i386-low.o i387-fp.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_xmlfiles="$srv_i386_linux_xmlfiles $srv_amd64_linux_xmlfiles"
 			srv_linux_usrregs=yes # This is for i386 progs.
 			srv_linux_regsets=yes
@@ -285,6 +301,7 @@ case "${target}" in
 
   xtensa*-*-linux*)	srv_regobj=reg-xtensa.o
 			srv_tgtobj="linux-low.o linux-osdata.o linux-xtensa-low.o linux-procfs.o"
+			srv_tgtobj="${srv_tgtobj} linux-ptrace.o"
 			srv_linux_regsets=yes
 			;;
   *)			echo "Error: target not supported by gdbserver."
Index: gdb-7.4.50.20120120/gdb/gdbserver/linux-low.c
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/gdbserver/linux-low.c	2012-03-06 07:39:41.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/gdbserver/linux-low.c	2012-03-06 07:39:50.776713111 +0100
@@ -630,10 +630,10 @@ linux_attach_lwp_1 (unsigned long lwpid,
 	  fflush (stderr);
 	  return;
 	}
-      else
-	/* If we fail to attach to a process, report an error.  */
-	error ("Cannot attach to lwp %ld: %s (%d)\n", lwpid,
-	       strerror (errno), errno);
+
+      /* If we fail to attach to a process, report an error.  */
+      error ("Cannot attach to lwp %ld: %s (%d)\n", lwpid,
+	     strerror (errno), errno);
     }
 
   if (initial)
Index: gdb-7.4.50.20120120/gdb/linux-nat.c
===================================================================
--- gdb-7.4.50.20120120.orig/gdb/linux-nat.c	2012-03-06 07:39:41.000000000 +0100
+++ gdb-7.4.50.20120120/gdb/linux-nat.c	2012-03-06 07:39:50.777713108 +0100
@@ -2464,37 +2464,6 @@ linux_handle_extended_wait (struct lwp_i
 		  _("unknown ptrace event %d"), event);
 }
 
-/* Return non-zero if LWP is a zombie.  */
-
-static int
-linux_lwp_is_zombie (long lwp)
-{
-  char buffer[MAXPATHLEN];
-  FILE *procfile;
-  int retval;
-  int have_state;
-
-  xsnprintf (buffer, sizeof (buffer), "/proc/%ld/status", lwp);
-  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;
-}
-
 /* Wait for LP to stop.  Returns the wait status, or 0 if the LWP has
    exited.  */
 
@@ -2548,10 +2517,10 @@ wait_lwp (struct lwp_info *lp)
 
 	 This is racy, what if the tgl becomes a zombie right after we check?
 	 Therefore always use WNOHANG with sigsuspend - it is equivalent to
-	 waiting waitpid but the linux_lwp_is_zombie is safe this way.  */
+	 waiting waitpid but linux_proc_pid_is_zombie is safe this way.  */
 
       if (GET_PID (lp->ptid) == GET_LWP (lp->ptid)
-	  && linux_lwp_is_zombie (GET_LWP (lp->ptid)))
+	  && linux_proc_pid_is_zombie (GET_LWP (lp->ptid)))
 	{
 	  thread_dead = 1;
 	  if (debug_linux_nat)
@@ -3431,7 +3400,7 @@ check_zombie_leaders (void)
 	  /* Check if there are other threads in the group, as we may
 	     have raced with the inferior simply exiting.  */
 	  && num_lwps (inf->pid) > 1
-	  && linux_lwp_is_zombie (inf->pid))
+	  && linux_proc_pid_is_zombie (inf->pid))
 	{
 	  if (debug_linux_nat)
 	    fprintf_unfiltered (gdb_stdlog,