NonSFI mode: Enable compiling exception_test for NonSFI NaCl on ARM

tests/exception_test/exception_test.c

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <assert.h>
 #include <errno.h>
 #include <pthread.h>
 #include <setjmp.h>
@@ skipping 104 matching lines @@
   longjmp(g_jmp_buf, 1);
 }
 
 void simple_exception_handler(struct NaClExceptionContext *regs) {
   return_from_exception_handler();
 }
 
 void exception_handler(struct NaClExceptionContext *context);
 REGS_SAVER_FUNC_NOPROTO(exception_handler, exception_handler_wrapped);
 
+__attribute__((__used__))
 void exception_handler_wrapped(struct NaClSignalContext *entry_regs) {
   struct NaClExceptionContext *context =
       (struct NaClExceptionContext *) RegsGetArg1(entry_regs);
   struct NaClExceptionPortableContext *portable =
       nacl_exception_context_get_portable(context);
 
   printf("handler called\n");
 
   assert(context->size == (uintptr_t) (portable + 1) - (uintptr_t) context);
   assert(context->portable_context_size ==
@@ skipping 184 matching lines @@
   if (!setjmp(g_jmp_buf)) {
     __asm__("hlt");
     exit(1);
   }
   printf("Testing ud2a (an illegal instruction)...\n");
   if (!setjmp(g_jmp_buf)) {
     __asm__("ud2a");
     exit(1);
   }
   printf("Testing integer division by zero...\n");
+#if 0
   if (!setjmp(g_jmp_buf)) {
     uint32_t result;
     __asm__ volatile("idivb %1"
                      : "=a"(result)
                      : "r"((uint8_t) 0), "a"((uint16_t) 1));
     exit(1);
   }
 #endif
+#endif
 
   /* Clear the jmp_buf to prevent it from being reused accidentally. */
   memset(g_jmp_buf, 0, sizeof(g_jmp_buf));
 }
 
 
-#if defined(__i386__) || defined(__x86_64__)
+#if 0 && (defined(__i386__) || defined(__x86_64__))
 
 int get_x86_direction_flag(void);
 
 void test_get_x86_direction_flag(void) {
   /*
    * Sanity check:  Ensure that get_x86_direction_flag() works.  We
    * avoid calling assert() with the flag set, because that might not
    * work.
    */
   assert(get_x86_direction_flag() == 0);
@@ skipping 43 matching lines @@
 int TestMain(void) {
   RUN_TEST(test_exceptions_minimally);
   RUN_TEST(test_exception_stack_alignments);
   RUN_TEST(test_getting_previous_handler);
   RUN_TEST(test_invalid_handlers);
   /* pthread_join() is broken under qemu-arm. */
   if (getenv("UNDER_QEMU_ARM") == NULL)
     RUN_TEST(test_exceptions_on_non_main_thread);
   RUN_TEST(test_catching_various_exception_types);
 
-#if defined(__i386__) || defined(__x86_64__)
+#if 0 && (defined(__i386__) || defined(__x86_64__))
   RUN_TEST(test_get_x86_direction_flag);
   RUN_TEST(test_unsetting_x86_direction_flag);
 #endif
 
   fprintf(stderr, "** intended_exit_status=0\n");
   return 0;
 }
 
 int main(void) {
   return RunTests(TestMain);
 }