* acconfig.h (HAVE_PREAD64): Add.

	* configure.in: Check for pread64.
	* config.in: Regenerated.
	* configure: Regenerated.
	* lin-lwp.c (lin_lwp_xfer_memory): Call linux_proc_xfer_memory.
	* linux-proc.c (linux_proc_xfer_memory): New function.
	* config/nm-linux.h (linux_proc_xfer_memory): Add prototype.

8 files changed, 193 insertions, 67 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0a11a4b..70203b9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2002-11-25  Daniel Jacobowitz  <drow@mvista.com>
+
+	* acconfig.h (HAVE_PREAD64): Add.
+	* configure.in: Check for pread64.
+	* config.in: Regenerated.
+	* configure: Regenerated.
+	* lin-lwp.c (lin_lwp_xfer_memory): Call linux_proc_xfer_memory.
+	* linux-proc.c (linux_proc_xfer_memory): New function.
+	* config/nm-linux.h (linux_proc_xfer_memory): Add prototype.
+
 2002-11-25  David Carlton  <carlton@math.stanford.edu>
 
 	* dwarf2read.c (scan_partial_symbols): Descend into namespace
diff --git a/gdb/acconfig.h b/gdb/acconfig.h
index 619b0ae..88c15e1 100644
--- a/gdb/acconfig.h
+++ b/gdb/acconfig.h
@@ -49,6 +49,9 @@
 /* Define if <sys/procfs.h> has pr_siginfo64_t */
 #undef HAVE_PR_SIGINFO64_T
 
+/* Define if the pread64 function is available.  */
+#undef HAVE_PREAD64
+
 /* Define if <link.h> exists and defines struct link_map which has
    members with an ``l_'' prefix.  (For Solaris, SVR4, and
    SVR4-like systems.) */
diff --git a/gdb/config.in b/gdb/config.in
index fa1ab9a..921b168 100644
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -80,6 +80,9 @@
 /* Define if your struct reg has r_gs.  */
 #undef HAVE_STRUCT_REG_R_GS
 
+/* Define if the pread64 function is available.  */
+#undef HAVE_PREAD64
+
 /* Define if <link.h> exists and defines struct link_map which has
    members with an ``l_'' prefix.  (For Solaris, SVR4, and
    SVR4-like systems.) */
@@ -517,3 +520,12 @@
 /* Define if <thread_db.h> has the TD_NOTALLOC error code. */
 #undef THREAD_DB_HAS_TD_NOTALLOC
 
+/* Define to be a string naming the default host character set. */
+#undef GDB_DEFAULT_HOST_CHARSET
+
+/* Define if you have the iconv() function. */
+#undef HAVE_ICONV
+
+/* Define as const if the declaration of iconv() needs const. */
+#undef ICONV_CONST
+
diff --git a/gdb/config/nm-linux.h b/gdb/config/nm-linux.h
index a2d4292..114acd8 100644
--- a/gdb/config/nm-linux.h
+++ b/gdb/config/nm-linux.h
@@ -71,4 +71,7 @@ extern void lin_thread_get_thread_signals (sigset_t *mask);
 /* Override child_pid_to_exec_file in 'inftarg.c'.  */
 #define CHILD_PID_TO_EXEC_FILE
 
-
+struct mem_attrib;
+extern int linux_proc_xfer_memory (CORE_ADDR addr, char *myaddr, int len,
+				   int write, struct mem_attrib *attrib,
+				   struct target_ops *target);
diff --git a/gdb/configure b/gdb/configure
index f96b8f9..726a368 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -6583,6 +6583,36 @@ EOF
 
 fi
 
+if test $host = $target; then
+  case $target in
+    *-linux*)
+      save_CFLAGS=$CFLAGS
+      CFLAGS="$CFLAGS -D_BSD_SOURCE -D_XOPEN_SOURCE=500 -D_LARGEFILE64_SOURCE"
+      cat > conftest.$ac_ext <<EOF
+#line 6593 "configure"
+#include "confdefs.h"
+#include <unistd.h>
+int main() {
+pread64 (0, NULL, 0, 0);
+; return 0; }
+EOF
+if { (eval echo configure:6600: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+  rm -rf conftest*
+  ENABLE_CFLAGS="$ENABLE_CFLAGS -D_BSD_SOURCE -D_XOPEN_SOURCE=500 -D_LARGEFILE64_SOURCE"
+		   cat >> confdefs.h <<\EOF
+#define HAVE_PREAD64 1
+EOF
+
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+fi
+rm -f conftest*
+      CFLAGS=$save_CFLAGS
+      ;;
+  esac
+fi
+
 
 # Check whether --enable-gdbcli or --disable-gdbcli was given.
 if test "${enable_gdbcli+set}" = set; then
@@ -6774,7 +6804,7 @@ WERROR_CFLAGS=""
 if test "x${build_warnings}" != x -a "x$GCC" = xyes
 then
     echo $ac_n "checking compiler warning flags""... $ac_c" 1>&6
-echo "configure:6778: checking compiler warning flags" >&5
+echo "configure:6808: checking compiler warning flags" >&5
     # Separate out the -Werror flag as some files just cannot be
     # compiled with it enabled.
     for w in ${build_warnings}; do
@@ -6784,14 +6814,14 @@ echo "configure:6778: checking compiler warning flags" >&5
 	    saved_CFLAGS="$CFLAGS"
 	    CFLAGS="$CFLAGS $w"
 	    cat > conftest.$ac_ext <<EOF
-#line 6788 "configure"
+#line 6818 "configure"
 #include "confdefs.h"
 
 int main() {
 
 ; return 0; }
 EOF
-if { (eval echo configure:6795: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:6825: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   WARN_CFLAGS="${WARN_CFLAGS} $w"
 else
@@ -6851,12 +6881,12 @@ fi
 
 if test $want_included_regex = false; then
   echo $ac_n "checking for GNU regex""... $ac_c" 1>&6
-echo "configure:6855: checking for GNU regex" >&5
+echo "configure:6885: checking for GNU regex" >&5
   if eval "test \"`echo '$''{'gdb_cv_have_gnu_regex'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 6860 "configure"
+#line 6890 "configure"
 #include "confdefs.h"
 #include <gnu-versions.h>
 #include <sys/types.h>
@@ -6868,7 +6898,7 @@ int main() {
 
 ; return 0; }
 EOF
-if { (eval echo configure:6872: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:6902: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   gdb_cv_have_gnu_regex=yes
 else
@@ -6897,12 +6927,12 @@ fi
 
 # In the Cygwin environment, we need some additional flags.
 echo $ac_n "checking for cygwin""... $ac_c" 1>&6
-echo "configure:6901: checking for cygwin" >&5
+echo "configure:6931: checking for cygwin" >&5
 if eval "test \"`echo '$''{'gdb_cv_os_cygwin'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 6906 "configure"
+#line 6936 "configure"
 #include "confdefs.h"
 
 #if defined (__CYGWIN__) || defined (__CYGWIN32__)
@@ -6940,7 +6970,7 @@ if test x$gdb_cv_os_cygwin = xyes; then
 else
   TERM_LIB=
   echo $ac_n "checking for tgetent in -lncurses""... $ac_c" 1>&6
-echo "configure:6944: checking for tgetent in -lncurses" >&5
+echo "configure:6974: checking for tgetent in -lncurses" >&5
 ac_lib_var=`echo ncurses'_'tgetent | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -6948,7 +6978,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lncurses  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 6952 "configure"
+#line 6982 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -6959,7 +6989,7 @@ int main() {
 tgetent()
 ; return 0; }
 EOF
-if { (eval echo configure:6963: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:6993: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -6978,7 +7008,7 @@ if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for tgetent in -lHcurses""... $ac_c" 1>&6
-echo "configure:6982: checking for tgetent in -lHcurses" >&5
+echo "configure:7012: checking for tgetent in -lHcurses" >&5
 ac_lib_var=`echo Hcurses'_'tgetent | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -6986,7 +7016,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lHcurses  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 6990 "configure"
+#line 7020 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -6997,7 +7027,7 @@ int main() {
 tgetent()
 ; return 0; }
 EOF
-if { (eval echo configure:7001: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:7031: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -7016,7 +7046,7 @@ if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for tgetent in -ltermlib""... $ac_c" 1>&6
-echo "configure:7020: checking for tgetent in -ltermlib" >&5
+echo "configure:7050: checking for tgetent in -ltermlib" >&5
 ac_lib_var=`echo termlib'_'tgetent | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -7024,7 +7054,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ltermlib  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 7028 "configure"
+#line 7058 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -7035,7 +7065,7 @@ int main() {
 tgetent()
 ; return 0; }
 EOF
-if { (eval echo configure:7039: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:7069: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -7054,7 +7084,7 @@ if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for tgetent in -ltermcap""... $ac_c" 1>&6
-echo "configure:7058: checking for tgetent in -ltermcap" >&5
+echo "configure:7088: checking for tgetent in -ltermcap" >&5
 ac_lib_var=`echo termcap'_'tgetent | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -7062,7 +7092,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ltermcap  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 7066 "configure"
+#line 7096 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -7073,7 +7103,7 @@ int main() {
 tgetent()
 ; return 0; }
 EOF
-if { (eval echo configure:7077: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:7107: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -7092,7 +7122,7 @@ if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for tgetent in -lcurses""... $ac_c" 1>&6
-echo "configure:7096: checking for tgetent in -lcurses" >&5
+echo "configure:7126: checking for tgetent in -lcurses" >&5
 ac_lib_var=`echo curses'_'tgetent | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -7100,7 +7130,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lcurses  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 7104 "configure"
+#line 7134 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -7111,7 +7141,7 @@ int main() {
 tgetent()
 ; return 0; }
 EOF
-if { (eval echo configure:7115: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:7145: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -7130,7 +7160,7 @@ if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
 else
   echo "$ac_t""no" 1>&6
 echo $ac_n "checking for tgetent in -lterminfo""... $ac_c" 1>&6
-echo "configure:7134: checking for tgetent in -lterminfo" >&5
+echo "configure:7164: checking for tgetent in -lterminfo" >&5
 ac_lib_var=`echo terminfo'_'tgetent | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -7138,7 +7168,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lterminfo  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 7142 "configure"
+#line 7172 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -7149,7 +7179,7 @@ int main() {
 tgetent()
 ; return 0; }
 EOF
-if { (eval echo configure:7153: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:7183: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -7314,7 +7344,7 @@ if test "${with_tclconfig+set}" = set; then
 fi
 
   echo $ac_n "checking for Tcl configuration""... $ac_c" 1>&6
-echo "configure:7318: checking for Tcl configuration" >&5
+echo "configure:7348: checking for Tcl configuration" >&5
   if eval "test \"`echo '$''{'ac_cv_c_tclconfig'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7422,7 +7452,7 @@ if test "${with_tkconfig+set}" = set; then
 fi
 
   echo $ac_n "checking for Tk configuration""... $ac_c" 1>&6
-echo "configure:7426: checking for Tk configuration" >&5
+echo "configure:7456: checking for Tk configuration" >&5
   if eval "test \"`echo '$''{'ac_cv_c_tkconfig'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7531,7 +7561,7 @@ fi
 
 no_tcl=true
 echo $ac_n "checking for Tcl private headers. dir=${configdir}""... $ac_c" 1>&6
-echo "configure:7535: checking for Tcl private headers. dir=${configdir}" >&5
+echo "configure:7565: checking for Tcl private headers. dir=${configdir}" >&5
 # Check whether --with-tclinclude or --without-tclinclude was given.
 if test "${with_tclinclude+set}" = set; then
   withval="$with_tclinclude"
@@ -7597,17 +7627,17 @@ fi
 if test x"${ac_cv_c_tclh}" = x ; then
    ac_safe=`echo "tclInt.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for tclInt.h""... $ac_c" 1>&6
-echo "configure:7601: checking for tclInt.h" >&5
+echo "configure:7631: checking for tclInt.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 7606 "configure"
+#line 7636 "configure"
 #include "confdefs.h"
 #include <tclInt.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:7611: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:7641: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -7667,7 +7697,7 @@ fi
 #
 no_tk=true
 echo $ac_n "checking for Tk private headers""... $ac_c" 1>&6
-echo "configure:7671: checking for Tk private headers" >&5
+echo "configure:7701: checking for Tk private headers" >&5
 # Check whether --with-tkinclude or --without-tkinclude was given.
 if test "${with_tkinclude+set}" = set; then
   withval="$with_tkinclude"
@@ -7733,17 +7763,17 @@ fi
 if test x"${ac_cv_c_tkh}" = x ; then
    ac_safe=`echo "tk.h" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for tk.h""... $ac_c" 1>&6
-echo "configure:7737: checking for tk.h" >&5
+echo "configure:7767: checking for tk.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 7742 "configure"
+#line 7772 "configure"
 #include "confdefs.h"
 #include <tk.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:7747: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:7777: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -7789,7 +7819,7 @@ fi
 
 	   
 echo $ac_n "checking for Itcl private headers. srcdir=${srcdir}""... $ac_c" 1>&6
-echo "configure:7793: checking for Itcl private headers. srcdir=${srcdir}" >&5
+echo "configure:7823: checking for Itcl private headers. srcdir=${srcdir}" >&5
 if test x"${ac_cv_c_itclh}" = x ; then
   for i in ${srcdir}/../itcl ${srcdir}/../../itcl ${srcdir}/../../../itcl ${srcdir}/../itcl/itcl; do
     if test -f $i/generic/itcl.h ; then
@@ -7812,7 +7842,7 @@ fi
 
 	   
 echo $ac_n "checking for Itk private headers. srcdir=${srcdir}""... $ac_c" 1>&6
-echo "configure:7816: checking for Itk private headers. srcdir=${srcdir}" >&5
+echo "configure:7846: checking for Itk private headers. srcdir=${srcdir}" >&5
 if test x"${ac_cv_c_itkh}" = x ; then
   for i in ${srcdir}/../itcl ${srcdir}/../../itcl ${srcdir}/../../../itcl ${srcdir}/../itcl/itk; do
     if test -f $i/generic/itk.h ; then
@@ -7835,7 +7865,7 @@ fi
 
 	   
 echo $ac_n "checking for Tix private headers. srcdir=${srcdir}""... $ac_c" 1>&6
-echo "configure:7839: checking for Tix private headers. srcdir=${srcdir}" >&5
+echo "configure:7869: checking for Tix private headers. srcdir=${srcdir}" >&5
 if test x"${ac_cv_c_tixh}" = x ; then
   for i in ${srcdir}/../tix ${srcdir}/../../tix ${srcdir}/../../../tix ; do
     if test -f $i/generic/tix.h ; then
@@ -7887,7 +7917,7 @@ if test "${with_itclconfig+set}" = set; then
 fi
 
   echo $ac_n "checking for Itcl configuration""... $ac_c" 1>&6
-echo "configure:7891: checking for Itcl configuration" >&5
+echo "configure:7921: checking for Itcl configuration" >&5
   if eval "test \"`echo '$''{'ac_cv_c_itclconfig'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -7990,7 +8020,7 @@ if test "${with_itkconfig+set}" = set; then
 fi
 
   echo $ac_n "checking for Itk configuration""... $ac_c" 1>&6
-echo "configure:7994: checking for Itk configuration" >&5
+echo "configure:8024: checking for Itk configuration" >&5
   if eval "test \"`echo '$''{'ac_cv_c_itkconfig'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8093,7 +8123,7 @@ if test "${with_tixconfig+set}" = set; then
 fi
 
   echo $ac_n "checking for Tix configuration""... $ac_c" 1>&6
-echo "configure:8097: checking for Tix configuration" >&5
+echo "configure:8127: checking for Tix configuration" >&5
   if eval "test \"`echo '$''{'ac_cv_c_tixconfig'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8239,7 +8269,7 @@ fi
 # Uses ac_ vars as temps to allow command line to override cache and checks.
 # --without-x overrides everything else, but does not touch the cache.
 echo $ac_n "checking for X""... $ac_c" 1>&6
-echo "configure:8243: checking for X" >&5
+echo "configure:8273: checking for X" >&5
 
 # Check whether --with-x or --without-x was given.
 if test "${with_x+set}" = set; then
@@ -8301,12 +8331,12 @@ if test "$ac_x_includes" = NO; then
 
   # First, try using that file with no special directory specified.
 cat > conftest.$ac_ext <<EOF
-#line 8305 "configure"
+#line 8335 "configure"
 #include "confdefs.h"
 #include <$x_direct_test_include>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:8310: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:8340: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -8375,14 +8405,14 @@ if test "$ac_x_libraries" = NO; then
   ac_save_LIBS="$LIBS"
   LIBS="-l$x_direct_test_library $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 8379 "configure"
+#line 8409 "configure"
 #include "confdefs.h"
 
 int main() {
 ${x_direct_test_function}()
 ; return 0; }
 EOF
-if { (eval echo configure:8386: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:8416: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   LIBS="$ac_save_LIBS"
 # We can link X programs with no special library path.
@@ -8674,7 +8704,7 @@ fi
 # ``gdbserver'' can only be built in a native configuration.
 if test x"${target}" = x"${host}"; then
     echo $ac_n "checking whether gdbserver is supported on this host""... $ac_c" 1>&6
-echo "configure:8678: checking whether gdbserver is supported on this host" >&5
+echo "configure:8708: checking whether gdbserver is supported on this host" >&5
     if test x"${build_gdbserver}" = xyes ; then
 	configdirs="${configdirs} gdbserver"
 	SUBDIRS="${SUBDIRS} gdbserver"
@@ -8736,7 +8766,7 @@ fi
 
 
 echo $ac_n "checking whether ln -s works""... $ac_c" 1>&6
-echo "configure:8740: checking whether ln -s works" >&5
+echo "configure:8770: checking whether ln -s works" >&5
 if eval "test \"`echo '$''{'ac_cv_prog_LN_S'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8760,12 +8790,12 @@ fi
 
 
 echo $ac_n "checking for Cygwin environment""... $ac_c" 1>&6
-echo "configure:8764: checking for Cygwin environment" >&5
+echo "configure:8794: checking for Cygwin environment" >&5
 if eval "test \"`echo '$''{'ac_cv_cygwin'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 8769 "configure"
+#line 8799 "configure"
 #include "confdefs.h"
 
 int main() {
@@ -8776,7 +8806,7 @@ int main() {
 return __CYGWIN__;
 ; return 0; }
 EOF
-if { (eval echo configure:8780: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:8810: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_cygwin=yes
 else
@@ -8793,19 +8823,19 @@ echo "$ac_t""$ac_cv_cygwin" 1>&6
 CYGWIN=
 test "$ac_cv_cygwin" = yes && CYGWIN=yes
 echo $ac_n "checking for mingw32 environment""... $ac_c" 1>&6
-echo "configure:8797: checking for mingw32 environment" >&5
+echo "configure:8827: checking for mingw32 environment" >&5
 if eval "test \"`echo '$''{'ac_cv_mingw32'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 8802 "configure"
+#line 8832 "configure"
 #include "confdefs.h"
 
 int main() {
 return __MINGW32__;
 ; return 0; }
 EOF
-if { (eval echo configure:8809: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:8839: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_mingw32=yes
 else
@@ -8824,7 +8854,7 @@ test "$ac_cv_mingw32" = yes && MINGW32=yes
 
 
 echo $ac_n "checking for executable suffix""... $ac_c" 1>&6
-echo "configure:8828: checking for executable suffix" >&5
+echo "configure:8858: checking for executable suffix" >&5
 if eval "test \"`echo '$''{'ac_cv_exeext'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8834,7 +8864,7 @@ else
   rm -f conftest*
   echo 'int main () { return 0; }' > conftest.$ac_ext
   ac_cv_exeext=
-  if { (eval echo configure:8838: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+  if { (eval echo configure:8868: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
     for file in conftest.*; do
       case $file in
       *.c | *.o | *.obj | *.ilk | *.pdb) ;;
@@ -8876,7 +8906,7 @@ fi
 
 
   echo $ac_n "checking for iconv""... $ac_c" 1>&6
-echo "configure:8880: checking for iconv" >&5
+echo "configure:8910: checking for iconv" >&5
 if eval "test \"`echo '$''{'am_cv_func_iconv'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8884,7 +8914,7 @@ else
     am_cv_func_iconv="no, consider installing GNU libiconv"
     am_cv_lib_iconv=no
     cat > conftest.$ac_ext <<EOF
-#line 8888 "configure"
+#line 8918 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 #include <iconv.h>
@@ -8894,7 +8924,7 @@ iconv_t cd = iconv_open("","");
        iconv_close(cd);
 ; return 0; }
 EOF
-if { (eval echo configure:8898: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:8928: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   am_cv_func_iconv=yes
 else
@@ -8906,7 +8936,7 @@ rm -f conftest*
       am_save_LIBS="$LIBS"
       LIBS="$LIBS -liconv"
       cat > conftest.$ac_ext <<EOF
-#line 8910 "configure"
+#line 8940 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 #include <iconv.h>
@@ -8916,7 +8946,7 @@ iconv_t cd = iconv_open("","");
          iconv_close(cd);
 ; return 0; }
 EOF
-if { (eval echo configure:8920: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:8950: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   am_cv_lib_iconv=yes
         am_cv_func_iconv=yes
@@ -8937,13 +8967,13 @@ echo "$ac_t""$am_cv_func_iconv" 1>&6
 EOF
 
     echo $ac_n "checking for iconv declaration""... $ac_c" 1>&6
-echo "configure:8941: checking for iconv declaration" >&5
+echo "configure:8971: checking for iconv declaration" >&5
     if eval "test \"`echo '$''{'am_cv_proto_iconv'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   
       cat > conftest.$ac_ext <<EOF
-#line 8947 "configure"
+#line 8977 "configure"
 #include "confdefs.h"
 
 #include <stdlib.h>
@@ -8962,7 +8992,7 @@ int main() {
 
 ; return 0; }
 EOF
-if { (eval echo configure:8966: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:8996: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   am_cv_proto_iconv_arg1=""
 else
diff --git a/gdb/configure.in b/gdb/configure.in
index 4c2e063..f452dec 100644
--- a/gdb/configure.in
+++ b/gdb/configure.in
@@ -617,6 +617,23 @@ if test "x$gdb_cv_thread_db_h_has_td_notalloc" = "xyes"; then
             [Define if <thread_db.h> has the TD_NOTALLOC error code.])
 fi
 
+dnl linux-proc.c wants to use pread64, which may require special CFLAGS
+dnl -D_BSD_SOURCE is normally assumed but we have to specify it because of
+dnl -D_XOPEN_SOURCE=500.
+if test $host = $target; then
+  case $target in
+    *-linux*)
+      save_CFLAGS=$CFLAGS
+      CFLAGS="$CFLAGS -D_BSD_SOURCE -D_XOPEN_SOURCE=500 -D_LARGEFILE64_SOURCE"
+      AC_TRY_LINK([#include <unistd.h>],
+		  [pread64 (0, NULL, 0, 0);],
+		  [ENABLE_CFLAGS="$ENABLE_CFLAGS -D_BSD_SOURCE -D_XOPEN_SOURCE=500 -D_LARGEFILE64_SOURCE"
+		   AC_DEFINE(HAVE_PREAD64)], [])
+      CFLAGS=$save_CFLAGS
+      ;;
+  esac
+fi
+
 dnl The CLI cannot be disabled yet, but may be in the future  
 
 dnl Handle CLI sub-directory configury.
diff --git a/gdb/lin-lwp.c b/gdb/lin-lwp.c
index 4b9d57d..88a10d8 100644
--- a/gdb/lin-lwp.c
+++ b/gdb/lin-lwp.c
@@ -1380,7 +1380,9 @@ lin_lwp_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
   if (is_lwp (inferior_ptid))
     inferior_ptid = pid_to_ptid (GET_LWP (inferior_ptid));
 
-  xfer = child_xfer_memory (memaddr, myaddr, len, write, attrib, target);
+  xfer = linux_proc_xfer_memory (memaddr, myaddr, len, write, attrib, target);
+  if (xfer == 0)
+    xfer = child_xfer_memory (memaddr, myaddr, len, write, attrib, target);
 
   do_cleanups (old_chain);
   return xfer;
diff --git a/gdb/linux-proc.c b/gdb/linux-proc.c
index f76def3..2f43ae6 100644
--- a/gdb/linux-proc.c
+++ b/gdb/linux-proc.c
@@ -25,6 +25,8 @@
 #include <sys/procfs.h>	/* for elf_gregset etc. */
 #include <sys/stat.h>	/* for struct stat */
 #include <ctype.h>	/* for isdigit */
+#include <unistd.h>	/* for open, pread64 */
+#include <fcntl.h>	/* for O_RDONLY */
 #include "regcache.h"	/* for registers_changed */
 #include "gregset.h"	/* for gregset */
 #include "gdbcore.h"	/* for get_exec_file */
@@ -33,6 +35,10 @@
 #include "cli/cli-decode.h"	/* for add_info */
 #include "gdb_string.h"
 
+#ifndef O_LARGEFILE
+#define O_LARGEFILE 0
+#endif
+
 /* Function: child_pid_to_exec_file
  *
  * Accepts an integer pid
@@ -577,3 +583,46 @@ Specify any of the following keywords for detailed info:\n\
   status   -- list a different bunch of random process info.\n\
   all      -- list all available /proc info.");
 }
+
+int linux_proc_xfer_memory (CORE_ADDR addr, char *myaddr, int len, int write,
+			    struct mem_attrib *attrib,
+			    struct target_ops *target)
+{
+  int fd, ret;
+  char filename[64];
+
+  if (write)
+    return 0;
+
+  /* Don't bother for one word.  */
+  if (len < 3 * sizeof (long))
+    return 0;
+
+  /* We could keep this file open and cache it - possibly one
+     per thread.  That requires some juggling, but is even faster.  */
+  sprintf (filename, "/proc/%d/mem", PIDGET (inferior_ptid));
+  fd = open (filename, O_RDONLY | O_LARGEFILE);
+  if (fd == -1)
+    return 0;
+
+  /* If pread64 is available, use it.  It's faster if the kernel
+     supports it (only one syscall), and it's 64-bit safe even
+     on 32-bit platforms (for instance, SPARC debugging a SPARC64
+     application).
+
+     We play some autoconf and CFLAGS games to get this declaration
+     exposed: -D_XOPEN_SOURCE=500 -D_LARGEFILE64_SOURCE.  And then
+     a -D_BSD_SOURCE to counteract the defaults for _XOPEN_SOURCE.  */
+#ifdef HAVE_PREAD64
+  if (pread64 (fd, myaddr, len, addr) != len)
+#else
+  if (lseek (fd, addr, SEEK_SET) == -1
+      || read (fd, myaddr, len) != len)
+#endif
+    ret = 0;
+  else
+    ret = len;
+
+  close (fd);
+  return ret;
+}