Mark assembly routines that don't need to be exported as hidden

native_client/src/trusted/service_runtime/arch/arm/nacl_switch.S

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 14 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "native_client/src/trusted/service_runtime/nacl_config.h"
 
   .text
-  .globl  IDENTIFIER(NaClSwitch)
+.globl  IDENTIFIER(NaClSwitch)
+  HIDDEN(NaClSwitch)
 IDENTIFIER(NaClSwitch):
 
   /*
    * This code is executed when switching from the service runtime to a nacl
    * module. This happens when a main nacl thread is created and starting to
    * execute the nacle code, or when nacl module is returning from a system
    * call. This piece of code lives in a service runtime part of address space.
    * the one and only argument is in register r0
    *
    * r0 -- address of thread context (struct NaClThreadContext)
    */
 
   /* clear registers r2,r3, lr, flag and status fields in CPSR (status
    * register). This might be necessary to avoid information leaks, the rest
    * register are overwritten by the following code and the code in springboard.
    */
   mov r2, #0
   mov r3, #0
   mov lr, #0
   msr cpsr_fs, #0
 
   ldmia r0!, {r4, r5, r6, r7, r8, r9, r10, fp, sp}
   add r0, #4 /* skip prog_ctr in struct NaClThreadContext */
   ldmia r0, {r0, r1, pc}
-