nptl: Move __pthread_unwind_next into libc

It's necessary to stub out __libc_disable_asynccancel and
__libc_enable_asynccancel via rtld-stubbed-symbols because the new
direct references to the unwinder result in symbol conflicts when the
rtld exception handling from libc is linked in during the construction
of librtld.map.

unwind-forcedunwind.c is merged into unwind-resume.c.  libc now needs
the functions that were previously only used in libpthread.

The GLIBC_PRIVATE exports of __libc_longjmp and __libc_siglongjmp are
no longer needed, so switch them to hidden symbols.

The symbol __pthread_unwind_next has been moved using
scripts/move-symbol-to-libc.py.

Reviewed-by: Adhemerva Zanella  <adhemerval.zanella@linaro.org>

2 files changed, 0 insertions, 66 deletions

diff --git a/sysdeps/nptl/pthread-functions.h b/sysdeps/nptl/pthread-functions.h
index 6ef7602cb9..280655fe40 100644
--- a/sysdeps/nptl/pthread-functions.h
+++ b/sysdeps/nptl/pthread-functions.h
@@ -57,8 +57,6 @@ struct pthread_functions
   int (*ptr___pthread_setspecific) (pthread_key_t, const void *);
 #define HAVE_PTR_NTHREADS
   unsigned int *ptr_nthreads;
-  void (*ptr___pthread_unwind) (__pthread_unwind_buf_t *)
-       __attribute ((noreturn)) __cleanup_fct_attribute;
   void (*ptr__nptl_deallocate_tsd) (void);
   int (*ptr__nptl_setxid) (struct xid_command *);
   void (*ptr_set_robust) (struct pthread *);
diff --git a/sysdeps/nptl/unwind-forcedunwind.c b/sysdeps/nptl/unwind-forcedunwind.c
deleted file mode 100644
index c0234670cf..0000000000
--- a/sysdeps/nptl/unwind-forcedunwind.c
+++ /dev/null
@@ -1,64 +0,0 @@
-/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Jakub Jelinek <jakub@redhat.com>.
-
-   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; see the file COPYING.LIB.  If
-   not, see <https://www.gnu.org/licenses/>.  */
-
-#include <stdio.h>
-#include <unwind-link.h>
-#include <pthreadP.h>
-#include <sysdep.h>
-#include <gnu/lib-names.h>
-#include <unwind-resume.h>
-
-struct unwind_link *
-__pthread_unwind_link_get (void)
-{
-  struct unwind_link *unwind_link = __libc_unwind_link_get ();
-  if (unwind_link == NULL)
-    __libc_fatal (LIBGCC_S_SO
-		  " must be installed for pthread_cancel to work\n");
-  return unwind_link;
-}
-
-#if !HAVE_ARCH_UNWIND_RESUME
-void
-_Unwind_Resume (struct _Unwind_Exception *exc)
-{
-  UNWIND_LINK_PTR (__pthread_unwind_link_get (), _Unwind_Resume) (exc);
-}
-#endif
-
-_Unwind_Reason_Code
-__gcc_personality_v0 PERSONALITY_PROTO
-{
-  return UNWIND_LINK_PTR (__pthread_unwind_link_get (), personality)
-    PERSONALITY_ARGS;
-}
-
-_Unwind_Reason_Code
-_Unwind_ForcedUnwind (struct _Unwind_Exception *exc, _Unwind_Stop_Fn stop,
-		      void *stop_argument)
-{
-  return UNWIND_LINK_PTR (__pthread_unwind_link_get (), _Unwind_ForcedUnwind)
-    (exc, stop, stop_argument);
-}
-
-_Unwind_Word
-_Unwind_GetCFA (struct _Unwind_Context *context)
-{
-  return UNWIND_LINK_PTR (__pthread_unwind_link_get (), _Unwind_GetCFA)
-    (context);
-}