[MIPS] Make $t8 point to the address of TLS pointers

tests/thread_capture/nacl_thread_capture_test_injection_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 <signal.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/ucontext.h>
 
 #include "native_client/src/include/build_config.h"
 #include "native_client/src/include/nacl_macros.h"
 #include "native_client/src/shared/platform/nacl_check.h"
 #include "native_client/src/trusted/service_runtime/nacl_config.h"
 #include "native_client/src/trusted/service_runtime/sel_main.h"
 #include "native_client/src/trusted/fault_injection/test_injection.h"
 #include "native_client/tests/thread_capture/thread_capture_test_injection.h"
 
 #if NACL_ARCH(NACL_BUILD_ARCH) == NACL_arm
 static const int kExpectedSignal = SIGILL;
+#elif NACL_ARCH(NACL_BUILD_ARCH) == NACL_mips
+static const int kExpectedSignal = SIGTRAP;
 #else
 static const int kExpectedSignal = SIGSEGV;
 #endif
 
 uintptr_t g_nacl_syscall_thread_capture_fault_addr;
 
 void NaClSignalHandler(int signum, siginfo_t *info, void *other) {
   uintptr_t faulting_pc;
   ucontext_t *ucp;
 
@@ skipping 67 matching lines @@
 static struct NaClTestInjectionTable const g_test_injection_functions = {
   NaClInjectThreadCaptureSyscall,  /* ChangeTrampolines */
   NaClSetSignalHandler,  /* BeforeMainThreadLaunches */
 };
 
 int main(int argc, char **argv) {
   NaClTestInjectionSetInjectionTable(&g_test_injection_functions);
   (void) NaClSelLdrMain(argc, argv);
   return 1;  /* fail! */
 }