* sysdeps/pthread/bits/libc-tsd.h: Include <tls.h>.

	[USE_TLS && HAVE___THREAD]: Just include the sysdeps/generic file,
	which does the right thing when __thread support is available.
	* descr.h (struct _pthread_descr_struct) [USE_TLS && HAVE___THREAD]:
	Omit `p_libc_specific', `p_errnop', `p_errno', `p_h_errnop',
	`p_h_errno', `p_resp', and `p_res' members.
	* pthread.c (__pthread_initialize_minimal) [USE_TLS && HAVE___THREAD]:
	Don't initialize `p_errnop' and `p_h_errnop' members.
	(__pthread_reset_main_thread): Likewise.
	(__pthread_initialize_manager): Likewise.
	* manager.c (__pthread_manager, pthread_handle_create): Likewise.
	* pthread.c (pthread_initialize) [USE_TLS && HAVE___THREAD]:
	Don't initialize `p_resp' member.
	(__pthread_reset_main_thread): Likewise.
	* manager.c (pthread_handle_create): Likewise.
	* specific.c (libc_internal_tsd_set, libc_internal_tsd_get):
	Conditionalize these on [!(USE_TLS && HAVE___THREAD)].
	* errno.c [USE_TLS && HAVE___THREAD]
	(__h_errno_location, __res_state): Don't define these at all.

	* sysdeps/i386/tls.h (INSTALL_DTV): Add parens around arguments!
	(INSTALL_NEW_DTV, GET_DTV): Likewise.
	* sysdeps/sh/tls.h (INSTALL_DTV, INSTALL_NEW_DTV, GET_DTV): Likewise.

	* weaks.c: Don't include <errno.h> here.

2002-08-01  Roland McGrath  <roland@redhat.com>

	* sysdeps/i386/tls.h (TLS_DO_MODIFY_LDT): New macro, broken out of
	TLS_INIT_TP.
	(TLS_DO_SET_THREAD_AREA): New macro, uses thread_set_area syscall.
	(TLS_SETUP_GS_SEGMENT): New macro, try one or the other or both.
	(TLS_INIT_TP): Use that.

3 files changed, 47 insertions, 7 deletions

diff --git a/include/errno.h b/include/errno.h
index 35f7051..9969b1f 100644
--- a/include/errno.h
+++ b/include/errno.h
@@ -1,13 +1,20 @@
+#ifndef _ERRNO_H
+
 #include <stdlib/errno.h>
 
 #ifdef _ERRNO_H
 
-#if USE_TLS && HAVE___THREAD
-# undef errno
+# include <tls.h>		/* Defines USE_TLS.  */
+
+# if USE_TLS && HAVE___THREAD
+#  undef  errno
+#  define errno errno		/* For #ifndef errno tests.  */
 extern __thread int errno;
-# define __set_errno(val) (errno = (val))
-#else
-# define __set_errno(val) (*__errno_location ()) = (val)
-#endif
+#  define __set_errno(val) (errno = (val))
+# else
+#  define __set_errno(val) (*__errno_location ()) = (val)
+# endif
+
+#endif /* _ERRNO_H */
 
-#endif
+#endif /* ! _ERRNO_H */
diff --git a/include/netdb.h b/include/netdb.h
index 0a97c01..1f2ab03 100644
--- a/include/netdb.h
+++ b/include/netdb.h
@@ -1,6 +1,26 @@
 #ifndef	_NETDB_H
 #include <resolv/netdb.h>
 
+/* Macros for accessing h_errno from inside libc.  */
+# ifdef _LIBC_REENTRANT
+#  include <tls.h>
+#  if USE_TLS && HAVE___THREAD
+#   undef  h_errno
+#   define h_errno h_errno	/* For #ifndef h_errno tests.  */
+extern __thread int h_errno;
+#   define __set_h_errno(x)	(h_errno = (x))
+#  else
+static inline int
+__set_h_errno (int __err)
+{
+  return *__h_errno_location () = __err;
+}
+#  endif
+# else
+#  undef  h_errno
+#  define __set_h_errno(x) (h_errno = (x))
+# endif	/* _LIBC_REENTRANT */
+
 /* Document internal interfaces.  */
 extern int __gethostent_r (struct hostent *__restrict __result_buf,
 			   char *__restrict __buf, size_t __buflen,
diff --git a/include/resolv.h b/include/resolv.h
index d4a531f..6d7008b 100644
--- a/include/resolv.h
+++ b/include/resolv.h
@@ -11,6 +11,19 @@
 #include <resolv/resolv.h>
 
 #ifdef _RESOLV_H_
+
+# ifdef _LIBC_REENTRANT
+#  include <tls.h>
+#  if USE_TLS && HAVE___THREAD
+#   undef _res
+extern __thread struct __res_state _res;
+#  endif
+# else
+#  ifndef __BIND_NOSTATIC
+extern struct __res_state _res;
+#  endif
+# endif
+
 /* Now define the internal interfaces.  */
 extern int __res_vinit (res_state, int);
 extern void _sethtent (int);