Update.

* elf/Makefile (dl-routines): Add preinit.
	* elf/Versions [ld.so] (GLIBC_2.2): Export _dl_preinit_next.
	* elf/link.h (struct link_map): Add new field l_preinitcount.
	* elf/dl-preinit.c: New file.
	* elf/dynamic-link.h: Initialize l_preinitcount.
	* sysdeps/i386/dl-machine.h (RTLD_START): Call pre-init functions.

ChangeLog

@@ -1,5 +1,12 @@
 1999-07-24  Ulrich Drepper  <drepper@cygnus.com>
 
+	* elf/Makefile (dl-routines): Add preinit.
+	* elf/Versions [ld.so] (GLIBC_2.2): Export _dl_preinit_next.
+	* elf/link.h (struct link_map): Add new field l_preinitcount.
+	* elf/dl-preinit.c: New file.
+	* elf/dynamic-link.h: Initialize l_preinitcount.
+	* sysdeps/i386/dl-machine.h (RTLD_START): Call pre-init functions.
+
 	* elf/dl-fini.c: Handle DT_FINI_ARRAY.
 	* elf/link.h (struct link_map): Remove l_init_running.  Add l_runcount
 	and l_initcount.

elf/Makefile

@@ -28,7 +28,7 @@ routines	= $(dl-routines) dl-open dl-close dl-symbol dl-support \
 # profiled libraries.
 dl-routines	= $(addprefix dl-,load cache lookup object reloc deps \
 			          runtime error init fini debug misc \
-				  version profile)
+				  version profile preinit)
 # But they are absent from the shared libc, because that code is in ld.so.
 elide-routines.os = $(dl-routines) dl-support enbl-secure
 

elf/Versions

@@ -48,4 +48,7 @@ ld.so {
     # functions used in other libraries
     _dl_dst_count; _dl_dst_substitute;
   }
+  GLIBC_2.2 {
+    _dl_preinit_next;
+  }
 }

elf/dl-preinit.c

@@ -0,0 +1,49 @@
+/* Return the next shared object pre-initializer function not yet run.
+   Copyright (C) 1995, 1996, 1998, 1999 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stddef.h>
+#include <elf/ldsodefs.h>
+
+
+/* Run initializers for MAP and its dependencies, in inverse dependency
+   order (that is, leaf nodes first).  */
+
+ElfW(Addr)
+internal_function
+_dl_preinit_next (struct r_scope_elem *searchlist)
+{
+  struct link_map *l = searchlist->r_list[0];
+  ElfW(Addr) *array;
+
+  if (l->l_runcount >= l->l_preinitcount)
+    {
+      /* That were all of the constructors.  */
+      l->l_runcount = 0;
+      return 0;
+    }
+
+  /* Print a debug message if wanted.  */
+  if (_dl_debug_impcalls && l->l_runcount == 0)
+    _dl_debug_message (1, "\ncalling preinit: ",
+		       l->l_name[0] ? l->l_name : _dl_argv[0],
+		       "\n\n", NULL);
+
+  array = (ElfW(Addr) *) l->l_info[DT_PREINIT_ARRAY]->d_un.d_ptr;
+  return l->l_addr + array[l->l_runcount++];
+}

elf/dynamic-link.h

@@ -118,6 +118,10 @@ elf_get_dynamic_info (struct link_map *l)
 			? (info[DT_INIT_ARRAYSZ]->d_un.d_val
 			   / sizeof (ElfW(Addr)))
 			: 0);
+  l->l_preinitcount = (info[DT_PREINIT_ARRAY]
+		       ? (info[DT_PREINIT_ARRAYSZ]->d_un.d_val
+			  / sizeof (ElfW(Addr)))
+		       : 0);
   if (info[DT_RUNPATH] != NULL)
     /* If both RUNPATH and RPATH are given, the latter is ignored.  */
     info[DT_RPATH] = NULL;

elf/link.h

@@ -211,6 +211,10 @@ struct link_map
 
     /* Collected information about own RUNPATH directories.  */
     struct r_search_path_elem **l_runpath_dirs;
+
+    /* Number of pre-constructors.  We compute this during loading to avoid
+       duplication of this during the possibly many calls to _dl_init_next.  */
+    unsigned int l_preinitcount;
   };
 
 #endif /* link.h */

sysdeps/i386/dl-machine.h

@@ -229,6 +229,18 @@ _dl_start_user:\n\
 	# _dl_init_next call below.\n\
 	movl _dl_main_searchlist@GOT(%ebx), %eax\n\
 	movl (%eax), %esi\n\
+	# First run the pre-initializers.\n\
+0:	movl %esi,%eax\n\
+	# Call _dl_init_next to return the address of an initializer\n\
+	# function to run.\n\
+	call _dl_preinit_next@PLT\n\
+	# Check for zero return, when out of initializers.\n\
+	testl %eax, %eax\n\
+	jz 0f\n\
+	# Call the pre-initilizer.\n\
+	call *%eax\n\
+	# Loop to call _dl_preinit_next for the next initializer.\n\
+	jmp 0b\n\
 0:	movl %esi,%eax\n\
 	# Call _dl_init_next to return the address of an initializer\n\
 	# function to run.\n\