diff --git a/gdb/printcmd.c b/gdb/printcmd.c
--- a/gdb/printcmd.c
+++ b/gdb/printcmd.c
@@ -1214,6 +1214,10 @@ print_command_1 (const char *args, int voidprint)
 
   if (exp != nullptr && *exp)
     {
+      /* '*((int *(*) (void)) __errno_location) ()' is incompatible with
+	 function descriptors.  */
+      if (target_has_execution && strcmp (exp, "errno") == 0)
+	exp = "*(*(int *(*)(void)) __errno_location) ()";
       expression_up expr = parse_expression (exp);
       val = evaluate_expression (expr.get ());
     }
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-errno.c b/gdb/testsuite/gdb.dwarf2/dw2-errno.c
new file mode 100644
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-errno.c
@@ -0,0 +1,28 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2005, 2007 Free Software Foundation, Inc.
+
+   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/>.
+
+   Please email any bugs, comments, and/or additions to this file to:
+   bug-gdb@prep.ai.mit.edu  */
+
+#include <errno.h>
+
+int main()
+{
+  errno = 42;
+
+  return 0;	/* breakpoint */
+}
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-errno.exp b/gdb/testsuite/gdb.dwarf2/dw2-errno.exp
new file mode 100644
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-errno.exp
@@ -0,0 +1,60 @@
+# Copyright 2007 Free Software Foundation, Inc.
+
+# 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/>.
+
+set testfile dw2-errno
+set srcfile ${testfile}.c
+set binfile [standard_output_file ${testfile}]
+
+proc prep {} {
+    global srcdir subdir binfile
+    gdb_exit
+    gdb_start
+    gdb_reinitialize_dir $srcdir/$subdir
+    gdb_load ${binfile}
+
+    runto_main
+
+    gdb_breakpoint [gdb_get_line_number "breakpoint"]
+    gdb_continue_to_breakpoint "breakpoint"
+}
+
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "additional_flags=-g2"] != "" } {
+    untested "Couldn't compile test program"
+    return -1
+}
+prep
+gdb_test "print errno" ".* = 42" "errno with macros=N threads=N"
+
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "additional_flags=-g3"] != "" } {
+    untested "Couldn't compile test program"
+    return -1
+}
+prep
+gdb_test "print errno" ".* = 42" "errno with macros=Y threads=N"
+
+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "additional_flags=-g2"] != "" } {
+    return -1
+}
+prep
+gdb_test "print errno" ".* = 42" "errno with macros=N threads=Y"
+
+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable "additional_flags=-g3"] != "" } {
+    return -1
+}
+prep
+gdb_test "print errno" ".* = 42" "errno with macros=Y threads=Y"
+
+# TODO: Test the error on resolving ERRNO with only libc loaded.
+# Just how to find the current libc filename?
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-errno2.c b/gdb/testsuite/gdb.dwarf2/dw2-errno2.c
new file mode 100644
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-errno2.c
@@ -0,0 +1,28 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2005, 2007 Free Software Foundation, Inc.
+
+   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/>.
+
+   Please email any bugs, comments, and/or additions to this file to:
+   bug-gdb@prep.ai.mit.edu  */
+
+#include <errno.h>
+
+int main()
+{
+  errno = 42;
+
+  return 0;	/* breakpoint */
+}
diff --git a/gdb/testsuite/gdb.dwarf2/dw2-errno2.exp b/gdb/testsuite/gdb.dwarf2/dw2-errno2.exp
new file mode 100644
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-errno2.exp
@@ -0,0 +1,71 @@
+# Copyright 2007 Free Software Foundation, Inc.
+
+# 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/>.
+
+set testfile dw2-errno2
+set srcfile ${testfile}.c
+set binfile [standard_output_file ${testfile}]
+
+proc prep { message {do_xfail 0} } { with_test_prefix $message {
+    global srcdir subdir binfile variant
+    gdb_exit
+    gdb_start
+    gdb_reinitialize_dir $srcdir/$subdir
+    gdb_load ${binfile}${variant}
+
+    runto_main
+
+    gdb_breakpoint [gdb_get_line_number "breakpoint"]
+    gdb_continue_to_breakpoint "breakpoint"
+
+    gdb_test "gcore ${binfile}${variant}.core" "\r\nSaved corefile .*" "gcore $variant"
+
+    gdb_test "print errno" ".* = 42"
+
+    gdb_test "kill" ".*" "kill" {Kill the program being debugged\? \(y or n\) } "y"
+    gdb_test "core-file ${binfile}${variant}.core" "\r\nCore was generated by .*" "core-file"
+    if $do_xfail {
+	setup_xfail "*-*-*"
+    }
+    gdb_test "print (int) errno" ".* = 42" "print errno for core"
+}}
+
+set variant g2thrN
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g2"] != "" } {
+    untested "Couldn't compile test program"
+    return -1
+}
+prep "macros=N threads=N" 1
+
+set variant g3thrN
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g3"] != "" } {
+    untested "Couldn't compile test program"
+    return -1
+}
+prep "macros=Y threads=N" 1
+
+set variant g2thrY
+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g2"] != "" } {
+    return -1
+}
+prep "macros=N threads=Y"
+
+set variant g3thrY
+if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}${variant}" executable "additional_flags=-g3"] != "" } {
+    return -1
+}
+prep "macros=Y threads=Y" 1
+
+# TODO: Test the error on resolving ERRNO with only libc loaded.
+# Just how to find the current libc filename?