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

src/trusted/service_runtime/arch/mips/sel_rt.h

 /*
  * 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.
  */
 
 /*
  * NaCl Secure Runtime
  */
 
@@ skipping 39 matching lines @@
    * use the same interface.
    */
   uint32_t  sysret;
   /*            30 */
   uint32_t  new_prog_ctr;
   /*            34 */
   uint32_t  trusted_stack_ptr;
   /*            38 */
   uint32_t  tls_idx;
   /*            3c */
+  uint32_t  tls_value1;
+  /*            40 */
   uint32_t  tls_value2;
-  /*            40 */
+  /*            44 */
+  uint32_t  guard_token;
+  /*            48 */
 };
 
 static INLINE uintptr_t NaClGetThreadCtxSp(struct NaClThreadContext *th_ctx) {
   return th_ctx->stack_ptr;
 }
 
 NORETURN void NaClStartSwitch(struct NaClThreadContext *);
 
 #endif /* !defined(__ASSEMBLER__) */
 
 #define NACL_THREAD_CONTEXT_OFFSET_S0                  0x00
 #define NACL_THREAD_CONTEXT_OFFSET_S1                  0x04
 #define NACL_THREAD_CONTEXT_OFFSET_S2                  0x08
 #define NACL_THREAD_CONTEXT_OFFSET_S3                  0x0c
 #define NACL_THREAD_CONTEXT_OFFSET_S4                  0x10
 #define NACL_THREAD_CONTEXT_OFFSET_S5                  0x14
 #define NACL_THREAD_CONTEXT_OFFSET_S6                  0x18
 #define NACL_THREAD_CONTEXT_OFFSET_S7                  0x1c
 #define NACL_THREAD_CONTEXT_OFFSET_T8                  0x20
 #define NACL_THREAD_CONTEXT_OFFSET_STACK_PTR           0x24
 #define NACL_THREAD_CONTEXT_OFFSET_FRAME_PTR           0x28
 #define NACL_THREAD_CONTEXT_OFFSET_PROG_CTR            0x2c
 #define NACL_THREAD_CONTEXT_OFFSET_SYSRET              0x30
 #define NACL_THREAD_CONTEXT_OFFSET_NEW_PROG_CTR        0x34
 #define NACL_THREAD_CONTEXT_OFFSET_TRUSTED_STACK_PTR   0x38
 #define NACL_THREAD_CONTEXT_OFFSET_TLS_IDX             0x3c
-#define NACL_THREAD_CONTEXT_OFFSET_TLS_VALUE2          0x40
+#define NACL_THREAD_CONTEXT_OFFSET_TLS_VALUE1          0x40
+#define NACL_THREAD_CONTEXT_OFFSET_TLS_VALUE2          0x44
+#define NACL_THREAD_CONTEXT_OFFSET_GUARD_TOKEN         0x48
 
 #if !defined(__ASSEMBLER__)
 
 /*
  * This function exists as a function only because compile-time
  * assertions need to be inside a function.  This function does not
  * need to be called for the assertions to be checked.
  */
 static INLINE void NaClThreadContextOffsetCheck(void) {
   int offset = 0;
@@ skipping 14 matching lines @@
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_S7, s7);
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_T8, t8);
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_STACK_PTR, stack_ptr);
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_FRAME_PTR, frame_ptr);
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_PROG_CTR, prog_ctr);
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_SYSRET, sysret);
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_NEW_PROG_CTR, new_prog_ctr);
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_TRUSTED_STACK_PTR,
                    trusted_stack_ptr);
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_TLS_IDX, tls_idx);
+  NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_TLS_VALUE1, tls_value1);
   NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_TLS_VALUE2, tls_value2);
+  NACL_CHECK_FIELD(NACL_THREAD_CONTEXT_OFFSET_GUARD_TOKEN, guard_token);
   CHECK(offset == sizeof(struct NaClThreadContext));
 
 #undef NACL_CHECK_FIELD
 }
 
 EXTERN_C_END
 
 #endif /* !defined(__ASSEMBLER__) */
 
 #endif /* __NATIVE_CLIENT_SERVICE_RUNTIME_ARCH_MIPS_SEL_RT_H___ */