[MIPS] Add remaining parts for building tests for MIPS

tests/exception_test/exception_crash_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 <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 58 matching lines @@
 # elif defined(__x86_64__)
     "naclrestsp $recovery_stack - 8, %r15\n"
     "jmp error_exit\n"
 # endif
     ".popsection\n");
 
 void error_exit(void) {
   _exit(1);
 }
 
+#elif NACL_ARCH(NACL_BUILD_ARCH) == NACL_mips
+
+char recovery_stack[0x1000] __attribute__((aligned(8)));
+
+void bad_stack_exception_handler(struct NaClExceptionContext *context);
+__asm__(".pushsection .text, \"ax\", @progbits\n"
+        "bad_stack_exception_handler:\n"
+        "lui   $t9,      %hi(recovery_stack)\n"
+        "addiu $sp, $t9, %lo(recovery_stack)\n"
+        "and   $sp, $sp, $t7\n"
+        "j error_exit\n"
+        "nop\n"
+        ".popsection\n");
+
+void error_exit() {
+  _exit(1);
+}
+
 #else
 
 /* TODO(mseaborn): Implement a stack switcher, like the one above, for ARM. */
 void bad_stack_exception_handler(struct NaClExceptionContext *context) {
   _exit(1);
 }
 
 #endif
 
 
@@ skipping 132 matching lines @@
   TRY_TEST(test_bad_handler);
   TRY_TEST(test_stack_outside_sandbox);
   TRY_TEST(test_stack_in_rwdata);
   TRY_TEST(test_stack_in_rodata);
   TRY_TEST(test_stack_in_code);
   TRY_TEST(test_crash_in_syscall);
 
   fprintf(stderr, "Error: Unknown test: \"%s\"\n", argv[1]);
   return 1;
 }