initial import of latest linuxthreads

1 files changed, 145 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/sysdeps/s390/tls.h b/libpthread/linuxthreads/sysdeps/s390/tls.h
new file mode 100644
index 000000000..f750f2d6f
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/s390/tls.h
@@ -0,0 +1,145 @@
+/* Definitions for thread-local data handling.  linuxthreads/s390 version.
+   Copyright (C) 2002, 2003, 2005 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
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _TLS_H
+#define _TLS_H
+
+#ifndef __ASSEMBLER__
+
+# include <pt-machine.h>
+# include <stdbool.h>
+# include <stddef.h>
+
+/* Type for the dtv.  */
+typedef union dtv
+{
+  size_t counter;
+  struct
+  {
+    void *val;
+    bool is_static;
+  } pointer;
+} dtv_t;
+
+typedef struct
+{
+  void *tcb;		/* Pointer to the TCB.  Not necessary the
+			   thread descriptor used by libpthread.  */
+  dtv_t *dtv;
+  void *self;		/* Pointer to the thread descriptor.  */
+  int multiple_threads;
+} tcbhead_t;
+
+#else /* __ASSEMBLER__ */
+# include <tcb-offsets.h>
+#endif /* __ASSEMBLER__ */
+
+/* TLS is always supported if the tools support it.  There are no
+   kernel dependencies.  To avoid bothering with the TLS support code
+   at all, use configure --without-tls.
+
+   We need USE_TLS to be consistently defined, for ldsodefs.h
+   conditionals.  */
+
+#ifdef HAVE_TLS_SUPPORT
+
+/* Signal that TLS support is available.  */
+# define USE_TLS	1
+
+# ifndef __ASSEMBLER__
+/* Get system call information.  */
+#  include <sysdep.h>
+
+
+/* Get the thread descriptor definition.  */
+#  include <linuxthreads/descr.h>
+
+/* This is the size of the initial TCB.  */
+#  define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
+
+/* Alignment requirements for the initial TCB.  */
+#  define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
+
+/* This is the size of the TCB.  */
+#  define TLS_TCB_SIZE sizeof (struct _pthread_descr_struct)
+
+/* Alignment requirements for the TCB.  */
+#  define TLS_TCB_ALIGN __alignof__ (struct _pthread_descr_struct)
+
+/* The TCB can have any size and the memory following the address the
+   thread pointer points to is unspecified.  Allocate the TCB there.  */
+#  define TLS_TCB_AT_TP	1
+
+
+/* Install the dtv pointer.  The pointer passed is to the element with
+   index -1 which contain the length.  */
+#  define INSTALL_DTV(descr, dtvp) \
+  ((tcbhead_t *) (descr))->dtv = (dtvp) + 1
+
+/* Install new dtv for current thread.  */
+#  define INSTALL_NEW_DTV(dtv) \
+  (((tcbhead_t *) __builtin_thread_pointer ())->dtv = (dtv))
+
+/* Return dtv of given thread descriptor.  */
+#  define GET_DTV(descr) \
+  (((tcbhead_t *) (descr))->dtv)
+
+/* Code to initially initialize the thread pointer.  This might need
+   special attention since 'errno' is not yet available and if the
+   operation can cause a failure 'errno' must not be touched.
+
+   The value of this macro is null if successful, or an error string.  */
+#  define TLS_INIT_TP(descr, secondcall)				      \
+  ({									      \
+    void *_descr = (descr);						      \
+    tcbhead_t *head = _descr;						      \
+									      \
+    head->tcb = _descr;							      \
+    /* For now the thread descriptor is at the same address.  */	      \
+    head->self = _descr;						      \
+									      \
+    __builtin_set_thread_pointer (_descr);				      \
+    NULL;								      \
+  })
+
+/* Return the address of the dtv for the current thread.  */
+#  define THREAD_DTV() \
+  (((tcbhead_t *) __builtin_thread_pointer ())->dtv)
+
+# endif /* __ASSEMBLER__ */
+
+#else	/* HAVE_TLS_SUPPORT && (FLOATING_STACKS || !IS_IN_libpthread) */
+
+# ifndef __ASSEMBLER__
+
+/* Get the thread descriptor definition.  */
+#  include <linuxthreads/descr.h>
+
+#  define NONTLS_INIT_TP \
+  do { 								\
+    static const tcbhead_t nontls_init_tp			\
+      = { .multiple_threads = 0 };				\
+    INIT_THREAD_SELF (&nontls_init_tp, 0);			\
+  } while (0)
+
+# endif /* __ASSEMBLER__ */
+
+#endif	/* HAVE_TLS_SUPPORT && (FLOATING_STACKS || !IS_IN_libpthread) */
+
+#endif	/* tls.h */