Revert "Patch [1/4] async-signal safe TLS."

This reverts commit 69a17d9d24.

ChangeLog

@@ -1044,17 +1044,6 @@
 	* manual/install.texi: Suppress menu for plain text output.
 	* INSTALL: Regenerated.
 
-2013-12-18  Andrew Hunter  <ahh@google.com>
-
-	* sysdeps/generic/ldsodefs.h (_dl_mask_all_signals): New prototype.
-	(_dl_unmask_signals): Likewise.
-	* sysdeps/mach/hurd/dl-sysdep.h (_dl_mask_all_signals): New stub.
-	(_dl_unmask_all_signals): Likewise.
-	* sysdeps/unix/sysv/linux/dl-sysdep.h (_dl_mask_all_signals): New prototype.
-	(_dl_unmask_all_signals): Likewise.
-	* sysdeps/unix/sysv/linux/dl-sysdep.c (_dl_mask_all_signals): New function.
-	(_dl_unmask_signals): Likewise.
-
 2013-12-18  Brooks Moses  <bmoses@google.com>
 
 	[BZ #15846]

sysdeps/generic/ldsodefs.h

@@ -234,11 +234,6 @@ extern int _dl_name_match_p (const char *__name, const struct link_map *__map)
 extern unsigned long int _dl_higher_prime_number (unsigned long int n)
      internal_function;
 
-/* Mask every signal, returning the previous sigmask in OLD.  */
-extern void _dl_mask_all_signals (sigset_t *old) internal_function;
-/* Undo _dl_mask_all_signals.  */
-extern void _dl_unmask_signals (sigset_t *old) internal_function;
-
 /* Function used as argument for `_dl_receive_error' function.  The
    arguments are the error code, error string, and the objname the
    error occurred in.  */

sysdeps/mach/hurd/dl-sysdep.h

@@ -29,10 +29,3 @@
 # define DL_ARGV_NOT_RELRO 1
 # define LIBC_STACK_END_NOT_RELRO 1
 #endif
-
-#include <signal.h>
-inline void _dl_mask_all_signals (sigset_t *) internal_function;
-inline void _dl_mask_all_signals (sigset_t *) { }
-
-inline void _dl_unmask_all_signals (sigset_t *) internal_function;
-inline void _dl_unmask_all_signals (sigset_t *) { }

sysdeps/unix/sysv/linux/dl-sysdep.c

@@ -19,7 +19,6 @@
 /* Linux needs some special initialization, but otherwise uses
    the generic dynamic linker system interface code.  */
 
-#include <assert.h>
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
@@ -131,48 +130,3 @@ _dl_discover_osversion (void)
 
   return version;
 }
-
-/* Mask every signal, returning the previous sigmask in OLD.  */
-void
-internal_function
-_dl_mask_all_signals (sigset_t *old)
-{
-  int ret;
-  sigset_t new;
-
-  sigfillset (&new);
-
-  /* This function serves as a replacement to pthread_sigmask, which
-     isn't available from within the dynamic linker since it would require
-     linking with libpthread. We duplicate some of the functionality here
-     to avoid requiring libpthread.  This isn't quite identical to
-     pthread_sigmask in that we do not mask internal signals used for
-     cancellation and setxid handling. This disables asynchronous
-     cancellation for the duration the signals are disabled, but it's a
-     small window, and prevents any problems with the use of TLS variables
-     in the signal handlers that would have executed.  */
-
-  /* It's very important we don't touch errno here, as that's TLS; since this
-     gets called from get_tls_addr we might end up recursing.  */
-
-  INTERNAL_SYSCALL_DECL (err);
-
-  ret = INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &new, old,
-			  _NSIG / 8);
-
-  assert (ret == 0);
-}
-
-/* Return sigmask to what it was before a call to _dl_mask_all_signals.  */
-void
-internal_function
-_dl_unmask_signals (sigset_t *old)
-{
-  int ret;
-  INTERNAL_SYSCALL_DECL (err);
-
-  ret = INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, old, NULL,
-			  _NSIG / 8);
-
-  assert (ret == 0);
-}

sysdeps/unix/sysv/linux/dl-sysdep.h

@@ -30,8 +30,4 @@
 /* Get version of the OS.  */
 extern int _dl_discover_osversion (void) attribute_hidden;
 # define HAVE_DL_DISCOVER_OSVERSION	1
-
-#include <signal.h>
-void _dl_mask_all_signals (sigset_t *) internal_function;
-void _dl_unmask_all_signals (sigset_t *) internal_function;
 #endif