Add a testcase for copy reloc against protected data

Linkers in some versions of binutils 2.25 and 2.26 don't support protected
data symbol with error messsage like:

/usr/bin/ld: copy reloc against protected `bar' is invalid
/usr/bin/ld: failed to set dynamic section sizes: Bad value

We check if linker supports copy reloc against protected data symbol to
avoid running the test if linker is broken.

Cherry-pick from master: 83569fb894050db7430047da2219ca50c68f882a
	[BZ #17711]
	* config.make.in (have-protected-data): New.
	* configure.ac: Check linker support for protected data symbol.
	* configure: Regenerated.
	* elf/Makefile (modules-names): Add tst-protected1moda and
	tst-protected1modb if $(have-protected-data) is yes.
	(tests): Add tst-protected1a and tst-protected1b if
	$(have-protected-data) is yes.
	($(objpfx)tst-protected1a): New.
	($(objpfx)tst-protected1b): Likewise.
	(tst-protected1modb.so-no-z-defs): Likewise.
	* elf/tst-protected1a.c: New file.
	* elf/tst-protected1b.c: Likewise.
	* elf/tst-protected1mod.h: Likewise.
	* elf/tst-protected1moda.c: Likewise.
	* elf/tst-protected1modb.c: Likewise.

9 files changed, 744 insertions, 0 deletions

diff --git a/config.make.in b/config.make.in
index ad4dd30607..5a18daed24 100644
--- a/config.make.in
+++ b/config.make.in
@@ -50,6 +50,7 @@ enable-werror = @enable_werror@
 have-z-combreloc = @libc_cv_z_combreloc@
 have-z-execstack = @libc_cv_z_execstack@
 have-Bgroup = @libc_cv_Bgroup@
+have-protected-data = @libc_cv_protected_data@
 with-fp = @with_fp@
 old-glibc-headers = @old_glibc_headers@
 unwind-find-fde = @libc_cv_gcc_unwind_find_fde@
diff --git a/configure b/configure
index ce0c6a01f1..a34d6f3ad2 100755
--- a/configure
+++ b/configure
@@ -634,6 +634,7 @@ libc_cv_z_combreloc
 ASFLAGS_config
 libc_cv_Bgroup
 libc_cv_cc_with_libunwind
+libc_cv_protected_data
 BISON
 INSTALL_INFO
 PERL
@@ -5632,6 +5633,45 @@ $as_echo "$libc_cv_visibility_attribute" >&6; }
 fi
 
 if test $libc_cv_visibility_attribute = yes; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking linker support for protected data symbol" >&5
+$as_echo_n "checking linker support for protected data symbol... " >&6; }
+if ${libc_cv_protected_data+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat > conftest.c <<EOF
+		  int bar __attribute__ ((visibility ("protected"))) = 1;
+EOF
+		  libc_cv_protected_data=no
+		  if { ac_try='${CC-cc} -nostdlib -nostartfiles -fPIC -shared conftest.c -o conftest.so'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+		    cat > conftest.c <<EOF
+		    extern int bar;
+		    int main (void) { return bar; }
+EOF
+		    if { ac_try='${CC-cc} -nostdlib -nostartfiles conftest.c -o conftest conftest.so'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+		      libc_cv_protected_data=yes
+		    fi
+		  fi
+		  rm -f conftest.*
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_protected_data" >&5
+$as_echo "$libc_cv_protected_data" >&6; }
+else
+  libc_cv_protected_data=no
+fi
+
+
+if test $libc_cv_visibility_attribute = yes; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for broken __attribute__((visibility()))" >&5
 $as_echo_n "checking for broken __attribute__((visibility()))... " >&6; }
 if ${libc_cv_broken_visibility_attribute+:} false; then :
diff --git a/configure.ac b/configure.ac
index d89aaf0cdf..65a6c909d6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1199,6 +1199,29 @@ EOF
 fi
 
 if test $libc_cv_visibility_attribute = yes; then
+  AC_CACHE_CHECK(linker support for protected data symbol,
+		 libc_cv_protected_data,
+		 [cat > conftest.c <<EOF
+		  int bar __attribute__ ((visibility ("protected"))) = 1;
+EOF
+		  libc_cv_protected_data=no
+		  if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles -fPIC -shared conftest.c -o conftest.so); then
+		    cat > conftest.c <<EOF
+		    extern int bar;
+		    int main (void) { return bar; }
+EOF
+		    if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles conftest.c -o conftest conftest.so); then
+		      libc_cv_protected_data=yes
+		    fi
+		  fi
+		  rm -f conftest.*
+		 ])
+else
+  libc_cv_protected_data=no
+fi
+AC_SUBST(libc_cv_protected_data)
+
+if test $libc_cv_visibility_attribute = yes; then
   AC_CACHE_CHECK(for broken __attribute__((visibility())),
 		 libc_cv_broken_visibility_attribute,
 		 [cat > conftest.c <<EOF
diff --git a/elf/Makefile b/elf/Makefile
index e5b142c7c6..d2380559a6 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -214,6 +214,13 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
 		tst-initorder2d \
 		tst-relsort1mod1 tst-relsort1mod2 tst-array2dep \
 		tst-array5dep tst-null-argv-lib
+ifeq (yes,$(have-protected-data))
+modules-names += tst-protected1moda tst-protected1modb
+tests += tst-protected1a tst-protected1b
+$(objpfx)tst-protected1a: $(addprefix $(objpfx),tst-protected1moda.so tst-protected1modb.so)
+$(objpfx)tst-protected1b: $(addprefix $(objpfx),tst-protected1modb.so tst-protected1moda.so)
+tst-protected1modb.so-no-z-defs = yes
+endif
 ifeq (yesyes,$(have-fpie)$(build-shared))
 modules-names += tst-piemod1
 tests += tst-pie1 tst-pie2
diff --git a/elf/tst-protected1a.c b/elf/tst-protected1a.c
new file mode 100644
index 0000000000..f4e76895a9
--- /dev/null
+++ b/elf/tst-protected1a.c
@@ -0,0 +1,236 @@
+/* Test the protected visibility when main is linked with moda and modb
+   in that order:
+   1. Protected symbols, protected1, protected2 and protected3, defined
+      in moda, are used in moda.
+   2. Protected symbol, protected3, defined in modb, are used in modb.
+   3. Symbol, protected1, defined in moda, is also used in main and modb.
+   4. Symbol, protected2, defined in main, is used in main.
+   5. Symbol, protected3, defined in moda, is also used in main.
+
+   Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* This file must be compiled as PIE to avoid copy relocation when
+   accessing protected symbols defined in shared libaries since copy
+   relocation doesn't work with protected symbols and linker in
+   binutils 2.26 enforces this rule.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "tst-protected1mod.h"
+
+/* Prototype for our test function.  */
+extern int do_test (void);
+
+int protected2 = -1;
+
+#define TEST_FUNCTION do_test ()
+
+/* This defines the `main' function and some more.  */
+#include <test-skeleton.c>
+
+int
+do_test (void)
+{
+  int res = 0;
+
+  /* Check if we get the same address for the protected data symbol.  */
+  if (&protected1 != protected1a_p ())
+    {
+      puts ("`protected1' in main and moda doesn't have same address");
+      res = 1;
+    }
+  if (&protected1 != protected1b_p ())
+    {
+      puts ("`protected1' in main and modb doesn't have same address");
+      res = 1;
+    }
+
+  /* Check if we get the right value for the protected data symbol.  */
+  if (protected1 != 3)
+    {
+      puts ("`protected1' in main and moda doesn't have same value");
+      res = 1;
+    }
+
+  /* Check if we get the right value for data defined in executable.  */
+  if (protected2 != -1)
+    {
+      puts ("`protected2' in main has the wrong value");
+      res = 1;
+    }
+
+  /* Check `protected1' in moda.  */
+  if (!check_protected1 ())
+    {
+      puts ("`protected1' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check `protected2' in moda.  */
+  if (!check_protected2 ())
+    {
+      puts ("`protected2' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the same address for the protected data symbol.  */
+  if (&protected3 != protected3a_p ())
+    {
+      puts ("`protected3' in main and moda doesn't have same address");
+      res = 1;
+    }
+  if (&protected3 == protected3b_p ())
+    {
+      puts ("`protected3' in main and modb has same address");
+      res = 1;
+    }
+
+  /* Check if we get the right value for the protected data symbol.  */
+  if (protected3 != 5)
+    {
+      puts ("`protected3' in main and moda doesn't have same value");
+      res = 1;
+    }
+
+  /* Check `protected3' in moda.  */
+  if (!check_protected3a ())
+    {
+      puts ("`protected3' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check `protected3' in modb.  */
+  if (!check_protected3b ())
+    {
+      puts ("`protected3' in modb has the wrong value");
+      res = 1;
+    }
+
+  /* Set `protected2' in moda to 30.  */
+  set_protected2 (300);
+
+  /* Check `protected2' in moda.  */
+  if (!check_protected2 ())
+    {
+      puts ("`protected2' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Set `protected1' in moda to 30.  */
+  set_protected1a (30);
+
+  /* Check `protected1' in moda.  */
+  if (!check_protected1 ())
+    {
+      puts ("`protected1' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the updated value for the protected data symbol.  */
+  if (protected1 != 30)
+    {
+      puts ("`protected1' in main doesn't have the updated value");
+      res = 1;
+    }
+
+  protected2 = -300;
+
+  /* Check `protected2' in moda.  */
+  if (!check_protected2 ())
+    {
+      puts ("`protected2' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if data defined in executable is changed.  */
+  if (protected2 != -300)
+    {
+      puts ("`protected2' in main is changed");
+      res = 1;
+    }
+
+  /* Set `protected1' in modb to 40.  */
+  set_protected1b (40);
+  set_expected_protected1 (40);
+
+  /* Check `protected1' in moda.  */
+  if (!check_protected1 ())
+    {
+      puts ("`protected1' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the updated value for the protected data symbol.  */
+  if (protected1 != 40)
+    {
+      puts ("`protected1' in main doesn't have the updated value");
+      res = 1;
+    }
+
+  /* Set `protected3' in moda to 80.  */
+  set_protected3a (80);
+
+  /* Check `protected3' in moda.  */
+  if (!check_protected3a ())
+    {
+      puts ("`protected3' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the updated value for the protected data symbol.  */
+  if (protected3 != 80)
+    {
+      puts ("`protected3' in main doesn't have the updated value");
+      res = 1;
+    }
+
+  /* Check `protected3' in modb.  */
+  if (!check_protected3b ())
+    {
+      puts ("`protected3' in modb has the wrong value");
+      res = 1;
+    }
+
+  /* Set `protected3' in modb to 100.  */
+  set_protected3b (100);
+
+  /* Check `protected3' in moda.  */
+  if (!check_protected3a ())
+    {
+      puts ("`protected3' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the updated value for the protected data symbol.  */
+  if (protected3 != 80)
+    {
+      puts ("`protected3' in main doesn't have the updated value");
+      res = 1;
+    }
+
+  /* Check `protected3' in modb.  */
+  if (!check_protected3b ())
+    {
+      puts ("`protected3' in modb has the wrong value");
+      res = 1;
+    }
+
+  return res;
+}
diff --git a/elf/tst-protected1b.c b/elf/tst-protected1b.c
new file mode 100644
index 0000000000..56352c406f
--- /dev/null
+++ b/elf/tst-protected1b.c
@@ -0,0 +1,242 @@
+/* Test the protected visibility when main is linked with modb and moda
+   in that order:
+   1. Protected symbols, protected1, protected2 and protected3, defined
+      in moda, are used in moda.
+   2.  Protected symbol, protected3, defined in modb, are used in modb
+   3. Symbol, protected1, defined in modb, is used in main and modb.
+   4. Symbol, protected2, defined in main, is used in main.
+   5. Symbol, protected3, defined in modb, is also used in main.
+
+   Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* This file must be compiled as PIE to avoid copy relocation when
+   accessing protected symbols defined in shared libaries since copy
+   relocation doesn't work with protected symbols and linker in
+   binutils 2.26 enforces this rule.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "tst-protected1mod.h"
+
+/* Prototype for our test function.  */
+extern int do_test (void);
+
+int protected2 = -1;
+
+#define TEST_FUNCTION do_test ()
+
+/* This defines the `main' function and some more.  */
+#include <test-skeleton.c>
+
+int
+do_test (void)
+{
+  int res = 0;
+
+  /* Check if we get the same address for the protected data symbol.  */
+  if (&protected1 == protected1a_p ())
+    {
+      puts ("`protected1' in main and moda has  same address");
+      res = 1;
+    }
+  if (&protected1 != protected1b_p ())
+    {
+      puts ("`protected1' in main and modb doesn't have same address");
+      res = 1;
+    }
+
+  /* Check if we get the right value for the protected data symbol.  */
+  if (protected1 != -3)
+    {
+      puts ("`protected1' in main and modb doesn't have same value");
+      res = 1;
+    }
+
+  /* Check if we get the right value for data defined in executable.  */
+  if (protected2 != -1)
+    {
+      puts ("`protected2' in main has the wrong value");
+      res = 1;
+    }
+
+  /* Check `protected1' in moda.  */
+  if (!check_protected1 ())
+    {
+      puts ("`protected1' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check `protected2' in moda.  */
+  if (!check_protected2 ())
+    {
+      puts ("`protected2' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the same address for the protected data symbol.  */
+  if (&protected3 == protected3a_p ())
+    {
+      puts ("`protected3' in main and moda has same address");
+      res = 1;
+    }
+  if (&protected3 != protected3b_p ())
+    {
+      puts ("`protected3' in main and modb doesn't have same address");
+      res = 1;
+    }
+
+  /* Check if we get the right value for the protected data symbol.  */
+  if (protected3 != -5)
+    {
+      puts ("`protected3' in main and modb doesn't have same value");
+      res = 1;
+    }
+
+  /* Check `protected3' in moda.  */
+  if (!check_protected3a ())
+    {
+      puts ("`protected3' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check `protected3' in modb.  */
+  if (!check_protected3b ())
+    {
+      puts ("`protected3' in modb has the wrong value");
+      res = 1;
+    }
+
+  /* Set `protected2' in moda to 30.  */
+  set_protected2 (300);
+
+  /* Check `protected2' in moda.  */
+  if (!check_protected2 ())
+    {
+      puts ("`protected2' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the right value for data defined in executable.  */
+  if (protected2 != -1)
+    {
+      puts ("`protected2' in main has the wrong value");
+      res = 1;
+    }
+
+  /* Set `protected1' in moda to 30.  */
+  set_protected1a (30);
+
+  /* Check `protected1' in moda.  */
+  if (!check_protected1 ())
+    {
+      puts ("`protected1' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the same value for the protected data symbol.  */
+  if (protected1 != -3)
+    {
+      puts ("`protected1' in main has the wrong value");
+      res = 1;
+    }
+
+  protected2 = -300;
+
+  /* Check `protected2' in moda.  */
+  if (!check_protected2 ())
+    {
+      puts ("`protected2' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if data defined in executable is changed.  */
+  if (protected2 != -300)
+    {
+      puts ("`protected2' in main is changed");
+      res = 1;
+    }
+
+  /* Set `protected1' in modb to 40.  */
+  set_protected1b (40);
+
+  /* Check `protected1' in moda.  */
+  if (!check_protected1 ())
+    {
+      puts ("`protected1' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the updated value for the protected data symbol.  */
+  if (protected1 != 40)
+    {
+      puts ("`protected1' in main doesn't have the updated value");
+      res = 1;
+    }
+
+  /* Set `protected3' in moda to 80.  */
+  set_protected3a (80);
+
+  /* Check `protected3' in moda.  */
+  if (!check_protected3a ())
+    {
+      puts ("`protected3' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the updated value for the protected data symbol.  */
+  if (protected3 != -5)
+    {
+      puts ("`protected3' in main doesn't have the updated value");
+      res = 1;
+    }
+
+  /* Check `protected3' in modb.  */
+  if (!check_protected3b ())
+    {
+      puts ("`protected3' in modb has the wrong value");
+      res = 1;
+    }
+
+  /* Set `protected3' in modb to 100.  */
+  set_protected3b (100);
+
+  /* Check `protected3' in moda.  */
+  if (!check_protected3a ())
+    {
+      puts ("`protected3' in moda has the wrong value");
+      res = 1;
+    }
+
+  /* Check if we get the updated value for the protected data symbol.  */
+  if (protected3 != 100)
+    {
+      puts ("`protected3' in main doesn't have the updated value");
+      res = 1;
+    }
+
+  /* Check `protected3' in modb.  */
+  if (!check_protected3b ())
+    {
+      puts ("`protected3' in modb has the wrong value");
+      res = 1;
+    }
+
+  return res;
+}
diff --git a/elf/tst-protected1mod.h b/elf/tst-protected1mod.h
new file mode 100644
index 0000000000..301e019dd8
--- /dev/null
+++ b/elf/tst-protected1mod.h
@@ -0,0 +1,41 @@
+/* Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Prototypes for the functions in the DSOs.  */
+extern int protected1;
+extern int protected2;
+extern int protected3;
+
+extern void set_protected1a (int);
+extern void set_protected1b (int);
+extern int *protected1a_p (void);
+extern int *protected1b_p (void);
+
+extern void set_expected_protected1 (int);
+extern int check_protected1 (void);
+
+extern void set_protected2 (int);
+extern int check_protected2 (void);
+
+extern void set_expected_protected3a (int);
+extern void set_protected3a (int);
+extern int check_protected3a (void);
+extern int *protected3a_p (void);
+extern void set_expected_protected3b (int);
+extern void set_protected3b (int);
+extern int check_protected3b (void);
+extern int *protected3b_p (void);
diff --git a/elf/tst-protected1moda.c b/elf/tst-protected1moda.c
new file mode 100644
index 0000000000..720f474281
--- /dev/null
+++ b/elf/tst-protected1moda.c
@@ -0,0 +1,92 @@
+/* Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "tst-protected1mod.h"
+
+int protected1 = 3;
+static int expected_protected1 = 3;
+int protected2 = 4;
+static int expected_protected2 = 4;
+int protected3 = 5;
+static int expected_protected3 = 5;
+
+asm (".protected protected1");
+asm (".protected protected2");
+asm (".protected protected3");
+
+void
+set_protected1a (int i)
+{
+  protected1 = i;
+  set_expected_protected1 (i);
+}
+
+void
+set_expected_protected1 (int i)
+{
+  expected_protected1 = i;
+}
+
+int *
+protected1a_p (void)
+{
+  return &protected1;
+}
+
+int
+check_protected1 (void)
+{
+  return protected1 == expected_protected1;
+}
+
+void
+set_protected2 (int i)
+{
+  protected2 = i;
+  expected_protected2 = i;
+}
+
+int
+check_protected2 (void)
+{
+  return protected2 == expected_protected2;
+}
+
+void
+set_expected_protected3a (int i)
+{
+  expected_protected3 = i;
+}
+
+void
+set_protected3a (int i)
+{
+  protected3 = i;
+  set_expected_protected3a (i);
+}
+
+int
+check_protected3a (void)
+{
+  return protected3 == expected_protected3;
+}
+
+int *
+protected3a_p (void)
+{
+  return &protected3;
+}
diff --git a/elf/tst-protected1modb.c b/elf/tst-protected1modb.c
new file mode 100644
index 0000000000..ddfa646ec3
--- /dev/null
+++ b/elf/tst-protected1modb.c
@@ -0,0 +1,62 @@
+/* Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+#include "tst-protected1mod.h"
+
+int protected1 = -3;
+int protected3 = -5;
+static int expected_protected3 = -5;
+
+asm (".protected protected3");
+
+void
+set_protected1b (int i)
+{
+  protected1 = i;
+}
+
+int *
+protected1b_p (void)
+{
+  return &protected1;
+}
+
+void
+set_expected_protected3b (int i)
+{
+  expected_protected3 = i;
+}
+
+void
+set_protected3b (int i)
+{
+  protected3 = i;
+  set_expected_protected3b (i);
+}
+
+int
+check_protected3b (void)
+{
+  return protected3 == expected_protected3;
+}
+
+int *
+protected3b_p (void)
+{
+  return &protected3;
+}