Update.

	* elf/rtld.c (_dl_start_final): Allocate TLS and initialize
	thread-pointer as soon as possible.
	* sysdeps/generic/ldsodefs.h: Include <tls.h>.  Define first TLS
	elements in rtld_global.
	* sysdeps/generic/tls.h: New file.
	* elf/Makefile (distribute): Add tls.h.
	* sysdeps/i386/dl-machine.h (elf_machine_rel): Add support for TLS
	relocations.  Not complete yet.

	* resolv/resolv.h: Allow user to define __need_res_state and only
	define __res_start structure then.
	* include/resolv.h: Only declare functions if _RESOLV_H_ is defined.

1 files changed, 95 insertions, 0 deletions

diff --git a/linuxthreads/sysdeps/i386/tls.h b/linuxthreads/sysdeps/i386/tls.h
new file mode 100644
index 0000000000..17f6e0ae45
--- /dev/null
+++ b/linuxthreads/sysdeps/i386/tls.h
@@ -0,0 +1,95 @@
+/* Definition for thread-local data handling.  linuxthreads/i386 version.
+   Copyright (C) 2002 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
+
+/* Type for the dtv.  */
+typedef union dtv
+{
+  size_t counter;
+  void *pointer;
+} dtv_t;
+
+
+typedef struct
+{
+  void *tcb;
+  dtv_t *dtv;
+} tcbhead_t;
+
+
+/* Get the thread descriptor definition.  */
+#include <linuxthreads/descr.h>
+
+
+/* We can support TLS only if the floating-stack support is available.  */
+#if FLOATING_STACKS && defined HAVE_TLS_SUPPORT
+
+/* Get system call information.  */
+# include <sysdep.h>
+
+/* Signal that TLS support is available.  */
+# define USE_TLS	1
+
+/* 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
+
+/* 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.  */
+# define TLS_INIT_TP(descr, dtvp) \
+  do {									      \
+    void *_descr = (descr);						      \
+    struct modify_ldt_ldt_s ldt_entry =					      \
+      { 0, (unsigned long int) _descr, 1048576, 1, 0, 0, 1, 0, 1, 0 };	      \
+    int result;								      \
+    tcbhead_t *head = _descr;						      \
+									      \
+    head->tcb = _descr;							      \
+    head->dtv = dtvp;							      \
+									      \
+    asm ("pushl %%ebx\n\t"						      \
+	 "movl $1, %%ebx\n\t"						      \
+	 "int $0x80\n\t"						      \
+	 "popl %%ebx"							      \
+	 : "=a" (result)						      \
+	 : "0" (__NR_modify_ldt), "d" (sizeof (ldt_entry)), "c" (&ldt_entry));\
+									      \
+    if (__builtin_expect (result, 0) != 0)				      \
+      /* Nothing else we can do.  */					      \
+      asm ("hlt");							      \
+  } while (0)
+
+#endif
+
+#endif	/* tls.h */