[glibc] m68k: Remove _dl_var_init

[glibc] m68k: Remove _dl_var_init

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9da94f45946a548dc4a7f871d0050fd1ebf70083

commit 9da94f45946a548dc4a7f871d0050fd1ebf70083
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon May 17 09:59:14 2021 +0200

    m68k: Remove _dl_var_init
    
    The generic __rtld_static_init code handles GLRO (dl_pagesize).
    
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Diff:
---
 sysdeps/unix/sysv/linux/m68k/Makefile    |  1 -
 sysdeps/unix/sysv/linux/m68k/Versions    |  5 --
 sysdeps/unix/sysv/linux/m68k/dl-static.c | 84 --------------------------------
 sysdeps/unix/sysv/linux/m68k/ldsodefs.h  | 32 ------------
 4 files changed, 122 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/m68k/Makefile b/sysdeps/unix/sysv/linux/m68k/Makefile
index be40fae68a..18ad2bf0ee 100644
--- a/sysdeps/unix/sysv/linux/m68k/Makefile
+++ b/sysdeps/unix/sysv/linux/m68k/Makefile
@@ -17,7 +17,6 @@ sysdep_headers += sys/reg.h
 endif
 
 ifeq ($(subdir),elf)
-sysdep-dl-routines += dl-static
 sysdep-others += lddlibc4
 install-bin += lddlibc4
 endif
diff --git a/sysdeps/unix/sysv/linux/m68k/Versions b/sysdeps/unix/sysv/linux/m68k/Versions
index 4b18795513..d98ae120c1 100644
--- a/sysdeps/unix/sysv/linux/m68k/Versions
+++ b/sysdeps/unix/sysv/linux/m68k/Versions
@@ -1,8 +1,3 @@
-ld {
-  GLIBC_PRIVATE {
-    _dl_var_init;
-  }
-}
 libc {
   GLIBC_2.0 {
     # Exception handling support functions from libgcc
diff --git a/sysdeps/unix/sysv/linux/m68k/dl-static.c b/sysdeps/unix/sysv/linux/m68k/dl-static.c
deleted file mode 100644
index e959d8b750..0000000000
--- a/sysdeps/unix/sysv/linux/m68k/dl-static.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/* Variable initialization.  M68K version.
-   Copyright (C) 2013-2021 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, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <ldsodefs.h>
-
-#ifdef SHARED
-
-void
-_dl_var_init (void *array[])
-{
-  /* It has to match "variables" below. */
-  enum
-    {
-      DL_PAGESIZE = 0,
-    };
-
-  GLRO(dl_pagesize) = *(size_t *) array[DL_PAGESIZE];
-}
-
-#else
-
-static void *variables[] =
-{
-  &GLRO(dl_pagesize)
-};
-
-static void
-_dl_unprotect_relro (struct link_map *l)
-{
-  ElfW(Addr) start = ((l->l_addr + l->l_relro_addr)
-		      & ~(GLRO(dl_pagesize) - 1));
-  ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size)
-		    & ~(GLRO(dl_pagesize) - 1));
-
-  if (start != end)
-    __mprotect ((void *) start, end - start, PROT_READ | PROT_WRITE);
-}
-
-void
-_dl_static_init (struct link_map *l)
-{
-  struct link_map *rtld_map = l;
-  struct r_scope_elem **scope;
-  const ElfW(Sym) *ref = NULL;
-  lookup_t loadbase;
-  void (*f) (void *[]);
-  size_t i;
-
-  loadbase = _dl_lookup_symbol_x ("_dl_var_init", l, &ref, l->l_local_scope,
-				  NULL, 0, 1, NULL);
-
-  for (scope = l->l_local_scope; *scope != NULL; scope++)
-    for (i = 0; i < (*scope)->r_nlist; i++)
-      if ((*scope)->r_list[i] == loadbase)
-	{
-	  rtld_map = (*scope)->r_list[i];
-	  break;
-	}
-
-  if (ref != NULL)
-    {
-      f = (void (*) (void *[])) DL_SYMBOL_ADDRESS (loadbase, ref);
-      _dl_unprotect_relro (rtld_map);
-      f (variables);
-      _dl_protect_relro (rtld_map);
-    }
-}
-
-#endif
diff --git a/sysdeps/unix/sysv/linux/m68k/ldsodefs.h b/sysdeps/unix/sysv/linux/m68k/ldsodefs.h
deleted file mode 100644
index ef46b21ed8..0000000000
--- a/sysdeps/unix/sysv/linux/m68k/ldsodefs.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/* Run-time dynamic linker data structures for loaded ELF shared objects. M68K.
-   Copyright (C) 2013-2021 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, see
-   <https://www.gnu.org/licenses/>.  */
-
-#ifndef	_LDSODEFS_H
-
-/* Get the real definitions.  */
-#include_next <ldsodefs.h>
-
-/* Now define our stuff.  */
-
-/* We need special support to initialize DSO loaded for statically linked
-   binaries.  */
-extern void _dl_static_init (struct link_map *map);
-#undef DL_STATIC_INIT
-#define DL_STATIC_INIT(map) _dl_static_init (map)
-
-#endif /* ldsodefs.h */