TLS support for libpthread, Mach/Hurd (x86).

	* Makefile (CFLAGS): Define ENABLE_TLS.
	* pthread/pt-create.c (__pthread_create_internal) [ENABLE_TLS]: Call
	into glibc to allocate static TLS block.
	* pthread/pt-exit.c (pthread_exit) [ENABLE_TLS]: Call into glibc to
	deallocate static TLS block.
	* pthread/pt-internal.h [ENABLE_TLS] (tcbhead_t): New structure; as in
	glibc.
	(__pthread) [ENABLE_TLS]: Add TCB member.
	[ENABLE_TLS] (_dl_allocate_tls, _dl_deallocate_tls): Declare; from
	glibc.
	* sysdeps/mach/hurd/pt-sysdep.h (__thread_set_pcsp): Rename to
	__thread_set_pcsptp.  Add SET_TP and TP parameters.  Change all
	callers.
	* sysdeps/mach/hurd/i386/pt-machdep.c (__thread_set_pcsptp): Imlement
	TLS support.
	* sysdeps/mach/hurd/i386/pt-setup.c (__pthread_setup): Likewise.

3 files changed, 45 insertions, 3 deletions

diff --git a/pthread/pt-create.c b/pthread/pt-create.c
index bad5d83f..0d66d6ce 100644
--- a/pthread/pt-create.c
+++ b/pthread/pt-create.c
@@ -1,5 +1,5 @@
 /* Thread creation.
-   Copyright (C) 2000, 2002, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2000, 2002, 2005, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -127,6 +127,13 @@ __pthread_create_internal (struct __pthread **thread,
   if (err)
     goto failed_thread_alloc;
 
+#ifdef ENABLE_TLS
+  pthread->tcb = _dl_allocate_tls (NULL);
+  if (!pthread->tcb)
+    goto failed_thread_tls_alloc;
+  pthread->tcb->tcb = pthread->tcb;
+#endif /* ENABLE_TLS */
+
   /* And initialize the rest of the machine context.  This may include
      additional machine- and system-specific initializations that
      prove convenient.  */
@@ -192,6 +199,10 @@ __pthread_create_internal (struct __pthread **thread,
  failed_sigstate:
   __pthread_sigstate_destroy (pthread);
  failed_setup:
+#ifdef ENABLE_TLS
+  _dl_deallocate_tls (pthread->tcb, 1);
+ failed_thread_tls_alloc:
+#endif /* ENABLE_TLS */
   __pthread_thread_dealloc (pthread);
   __pthread_thread_halt (pthread, 0);
  failed_thread_alloc:
diff --git a/pthread/pt-exit.c b/pthread/pt-exit.c
index 7484ffd1..941526ae 100644
--- a/pthread/pt-exit.c
+++ b/pthread/pt-exit.c
@@ -1,5 +1,5 @@
 /* Thread termination.
-   Copyright (C) 2000, 2002, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2000, 2002, 2005, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -70,6 +70,10 @@ pthread_exit (void *status)
   if (self->cancel_state == PTHREAD_CANCEL_ENABLE && self->cancel_pending)
     status = PTHREAD_CANCELED;
 
+#ifdef ENABLE_TLS
+  if (self->tcb)
+    _dl_deallocate_tls (self->tcb, 1);
+#endif /* ENABLE_TLS */
   __pthread_thread_dealloc (self);
 
   switch (self->state)
diff --git a/pthread/pt-internal.h b/pthread/pt-internal.h
index efd4ffb9..159f1cbd 100644
--- a/pthread/pt-internal.h
+++ b/pthread/pt-internal.h
@@ -1,5 +1,5 @@
 /* Internal defenitions for pthreads library.
-   Copyright (C) 2000, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2000, 2005, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -50,6 +50,16 @@ enum pthread_state
 # define PTHREAD_SYSDEP_MEMBERS
 #endif
 
+#ifdef ENABLE_TLS
+/* Type of the TCB.  */
+typedef struct
+{
+  void *tcb;			/* Points to this structure.  */
+  void *dtv;			/* Vector of pointers to TLS data.  */
+  thread_t self;		/* This thread's control port.  */
+} tcbhead_t;
+#endif /* ENABLE_TLS */
+
 /* This structure describes a POSIX thread.  */
 struct __pthread
 {
@@ -85,6 +95,10 @@ struct __pthread
 
   PTHREAD_SYSDEP_MEMBERS
 
+#ifdef ENABLE_TLS
+  tcbhead_t *tcb;
+#endif /* ENABLE_TLS */
+
   struct __pthread *next, **prevp;
 };
 
@@ -272,4 +286,17 @@ const struct __pthread_rwlockattr __pthread_default_rwlockattr;
 /* Default condition attributes.  */
 const struct __pthread_condattr __pthread_default_condattr;
 
+
+#ifdef ENABLE_TLS
+
+/* From glibc.  */
+
+/* Dynamic linker TLS allocation.  */
+extern void *_dl_allocate_tls(void *);
+
+/* Dynamic linker TLS deallocation.  */
+extern void _dl_deallocate_tls(void *, int);
+
+#endif /* ENABLE_TLS */
+
 #endif /* pt-internal.h */