4 files changed, 21 insertions, 0 deletions
diff --git a/nptl/sysdeps/i386/tcb-offsets.sym b/nptl/sysdeps/i386/tcb-offsets.sym
index 4e0444ba38..7c8d9a5ca5 100644
--- a/nptl/sysdeps/i386/tcb-offsets.sym
+++ b/nptl/sysdeps/i386/tcb-offsets.sym
@@ -11,3 +11,4 @@ SYSINFO_OFFSET		offsetof (tcbhead_t, sysinfo)
 CLEANUP			offsetof (struct pthread, cleanup)
 CLEANUP_PREV		offsetof (struct _pthread_cleanup_buffer, __prev)
 MUTEX_FUTEX		offsetof (pthread_mutex_t, __data.__lock)
+POINTER_GUARD		offsetof (tcbhead_t, pointer_guard)
diff --git a/nptl/sysdeps/i386/tls.h b/nptl/sysdeps/i386/tls.h
index 65566ff7a7..a870a848cf 100644
--- a/nptl/sysdeps/i386/tls.h
+++ b/nptl/sysdeps/i386/tls.h
@@ -50,6 +50,7 @@ typedef struct
   int multiple_threads;
   uintptr_t sysinfo;
   uintptr_t stack_guard;
+  uintptr_t pointer_guard;
 } tcbhead_t;
 
 # define TLS_MULTIPLE_THREADS_IN_TCB 1
@@ -425,6 +426,14 @@ union user_desc_init
    = THREAD_GETMEM (THREAD_SELF, header.stack_guard))
 
 
+/* Set the pointer guard field in the TCB head.  */
+#define THREAD_SET_POINTER_GUARD(value) \
+  THREAD_SETMEM (THREAD_SELF, header.pointer_guard, value)
+#define THREAD_COPY_POINTER_GUARD(descr) \
+  ((descr)->header.pointer_guard					      \
+   = THREAD_GETMEM (THREAD_SELF, header.pointer_guard))
+
+
 #endif /* __ASSEMBLER__ */
 
 #endif	/* tls.h */
diff --git a/nptl/sysdeps/x86_64/tcb-offsets.sym b/nptl/sysdeps/x86_64/tcb-offsets.sym
index 8118d2df8b..a9ede75c96 100644
--- a/nptl/sysdeps/x86_64/tcb-offsets.sym
+++ b/nptl/sysdeps/x86_64/tcb-offsets.sym
@@ -10,3 +10,4 @@ CLEANUP			offsetof (struct pthread, cleanup)
 CLEANUP_PREV		offsetof (struct _pthread_cleanup_buffer, __prev)
 MUTEX_FUTEX		offsetof (pthread_mutex_t, __data.__lock)
 MULTIPLE_THREADS_OFFSET	offsetof (tcbhead_t, multiple_threads)
+POINTER_GUARD		offsetof (tcbhead_t, pointer_guard)
diff --git a/nptl/sysdeps/x86_64/tls.h b/nptl/sysdeps/x86_64/tls.h
index 516827b8e1..13cf6fb3f5 100644
--- a/nptl/sysdeps/x86_64/tls.h
+++ b/nptl/sysdeps/x86_64/tls.h
@@ -49,6 +49,7 @@ typedef struct
   int multiple_threads;
   uintptr_t sysinfo;
   uintptr_t stack_guard;
+  uintptr_t pointer_guard;
 } tcbhead_t;
 
 #else /* __ASSEMBLER__ */
@@ -329,6 +330,15 @@ typedef struct
     ((descr)->header.stack_guard					      \
      = THREAD_GETMEM (THREAD_SELF, header.stack_guard))
 
+
+/* Set the pointer guard field in the TCB head.  */
+#define THREAD_SET_POINTER_GUARD(value) \
+  THREAD_SETMEM (THREAD_SELF, header.pointer_guard, value)
+#define THREAD_COPY_POINTER_GUARD(descr) \
+  ((descr)->header.pointer_guard					      \
+   = THREAD_GETMEM (THREAD_SELF, header.pointer_guard))
+
+
 #endif /* __ASSEMBLER__ */
 
 #endif	/* tls.h */