Restore ARM profil_counter export (bug 14043).

ChangeLog.arm

@@ -1,3 +1,11 @@
+2012-05-01  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #14043]
+	* sysdeps/unix/sysv/linux/arm/profil-counter.h: New file.  Based
+	on i386 version but without "static".
+	* sysdeps/unix/sysv/linux/arm/nptl/libc.abilist (GLIBC_2.4): Add
+	profil_counter.
+
 2012-04-28  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #13986]

sysdeps/unix/sysv/linux/arm/nptl/libc.abilist

@@ -1421,6 +1421,7 @@ GLIBC_2.4
  printf_size F
  printf_size_info F
  profil F
+ profil_counter F
  program_invocation_name D 0x4
  program_invocation_short_name D 0x4
  pselect F

sysdeps/unix/sysv/linux/arm/profil-counter.h

@@ -1,2 +1,31 @@
-/* We can use the ix86 version.  */
-#include <sysdeps/unix/sysv/linux/i386/profil-counter.h>
+/* Low-level statistical profiling support function.  Linux/ARM version.
+   Copyright (C) 1996-2012 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 <signal.h>
+#include <sigcontextinfo.h>
+
+void
+profil_counter (int signo, const SIGCONTEXT scp)
+{
+  profil_count ((void *) GET_PC (scp));
+
+  /* This is a hack to prevent the compiler from implementing the
+     above function call as a sibcall.  The sibcall would overwrite
+     the signal context.  */
+  asm volatile ("");
+}