Update.

2000-03-30  Ulrich Drepper  <drepper@redhat.com>

	Implement dynamic determination of constructor/destructor order in
	the dynamic linker.
	* elf/Versions [ld.so] (GLIBC_2.0): Remove _dl_init_next.
	(GLIBC_2.2): Add _dl_init.
	* elf/dl-close.c: Also call all destructors in FINI_ARRAY.
	r_duplist is not anymore allocated separately.  l_initfini is and
	therefore free it if necessary.
	* elf/dl-deps.c: If a searchlist has to be allocated, put all in one
	malloc block.  Otherwise allocate l_initfini list only.
	Put dependencies for the object in l_initfini list.
	Sort dependencies for the object to be loaded topologically.
	* elf/dl-fini.c: Before running the destructors sort the topologically.
	* elf/dl-init.c (_dl_init): Renamed from _dl_init_next.  Rewrite to
	call constructors instead of iterating over the pointers.  Get list of
	objects for which to run constructors from l_initfini element. Accept
	argc, argv, and env as parameters and pass them to the constructors.
	* elf/ld-load.c (_dl_map_object_from_fd): Initialize l_ldnum member
	with size of dynamic section.
	* elf/dl-open.c (dl_open_worker): Only call _dl_init instead of
	_dl_init_next and calling constructors ourself.
	* elf/dl-preinit.c (_dl_preinit): Renamed from _dl_preinit_next.
	Take argc, argv, and env as parameters and pass them to the
	constructors.  Rewrite to call all constructors and not iterate over
	the pointers.
	* elf/dynamic-link.h: Don't relocate DT_FINI_ARRAY entry.  Don't
	precompute l_initcount and l_preinitcount.
	* elf/link.h (struct link_map): Add l_ldnum member.
	Make l_phdr_allocated part of the bitfield.  Remove l_runcount,
	l_initcount, and l_preinitcount.  Add l_initfini.
	* sysdeps/generic/ldsodefs.h: Replace _dl_init_next prototype with
	one for _dl_init.
	* sysdeps/i386/dl-machine (RTLD_START): Rewrite to match new init
	function interface.
	* sysdeps/unix/sysv/linux/init-first.h: Removed.
	* sysdeps/unix/sysv/linux/Dist: Delete file here as well.
	* sysdeps/unix/sysv/linux/init-first.c [PIC]: Don't use
	SYSDEP_CALL_INIT.  Make _init a strong alias of init.  The calling
	conventions now match.

	* sysdeps/generic/libc-start.c: Calling __libc_init_first has no
	effect for shared objects.  Don't emit message and call only for
	static library.

1 files changed, 6 insertions, 14 deletions

diff --git a/elf/link.h b/elf/link.h
index ac53a20..e4c2fea 100644
--- a/elf/link.h
+++ b/elf/link.h
@@ -1,6 +1,6 @@
 /* Data structure for communication from the run-time dynamic linker for
    loaded ELF shared objects.
-   Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1995-1999, 2000 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
@@ -137,6 +137,7 @@ struct link_map
     const ElfW(Phdr) *l_phdr;	/* Pointer to program header table in core.  */
     ElfW(Addr) l_entry;		/* Entry point location.  */
     ElfW(Half) l_phnum;		/* Number of program header entries.  */
+    ElfW(Half) l_ldnum;	/* Number of dynamic segment entries.  */
 
     /* Array of DT_NEEDED dependencies and their dependencies, in
        dependency order for symbol lookup (with and without
@@ -166,6 +167,8 @@ struct link_map
     unsigned int l_init_called:1; /* Nonzero if DT_INIT function called.  */
     unsigned int l_global:1;	/* Nonzero if object in _dl_global_scope.  */
     unsigned int l_reserved:2;	/* Reserved for internal use.  */
+    unsigned int l_phdr_allocated:1; /* Nonzero if the data structure pointed
+					to by `l_phdr' is allocated.  */
 
     /* Array with version names.  */
     unsigned int l_nversions;
@@ -200,22 +203,11 @@ struct link_map
     dev_t l_dev;
     ino_t l_ino;
 
-    /* Nonzero if the data structure pointed to by `l_phdr' is allocated.  */
-    int l_phdr_allocated;
-
-    /* Counter for running constructors and destructors.  */
-    unsigned int l_runcount;
-
-    /* Number of constructors.  We compute this during loading to avoid
-       duplication of this during the possibly many calls to _dl_init_next.  */
-    unsigned int l_initcount;
-
     /* 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;
+    /* List of object in order of the init and fini calls.  */
+    struct link_map **l_initfini;
   };
 
 #endif /* link.h */