glibc/elf/dl-init.c
Roland McGrath 879bf2e65a * sysdeps/mach/hurd/dl-sysdep.c (_dl_sysdep_start): If started by
kernel with args on stack, point _dl_hurd_data at zero data
	instead of garbage.  When ld.so run as program, grok args
	-LIB=MEMOBJ and pre-load shared object files found in memory
	objects loaded by the boot loader.

	* elf/link.h (struct link_map): New member `l_entry'.
	(_dl_map_object, _dl_map_object_from_fd): Remove last arg ENTRY_POINT.
	* elf/dl-load.c (_dl_map_object, _dl_map_object_from_fd): Remove
	last arg ENTRY_POINT.  Store the entry point location in the
	`l_entry' member of the new map.
	* elf/rtld.c (dl_main): Don't pass USER_ENTRY arg to
	_dl_map_object.  When run as program, set *USER_ENTRY to L->l_entry.
	* elf/dl-init.c (_dl_init_next): Don't pass ENTRY_POINT arg to
	_dl_map_object.
1995-09-30 21:18:30 +00:00

89 lines
2.4 KiB
C

/* Return the next shared object initializer function not yet run.
Copyright (C) 1995 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., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <stddef.h>
#include <link.h>
Elf32_Addr
_dl_init_next (void)
{
struct link_map *l;
Elf32_Addr init;
Elf32_Addr next_init (struct link_map *l)
{
if (l->l_init_called)
/* This object is all done. */
return 0;
if (l->l_init_running)
{
/* This object's initializer was just running.
Now mark it as having run, so this object
will be skipped in the future. */
l->l_init_called = 1;
l->l_init_running = 0;
return 0;
}
if (l->l_info[DT_NEEDED])
{
/* Find each dependency in order, and see if it
needs to run an initializer. */
const char *strtab
= ((void *) l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr);
const Elf32_Dyn *d;
for (d = l->l_ld; d->d_tag != DT_NULL; ++d)
if (d->d_tag == DT_NEEDED)
{
struct link_map *needed
= _dl_map_object (l, strtab + d->d_un.d_val);
Elf32_Addr init;
--needed->l_opencount;
init = next_init (needed); /* Recurse on this dependency. */
if (init != 0)
return init;
}
}
if (l->l_info[DT_INIT])
{
/* Run this object's initializer. */
l->l_init_running = 1;
return l->l_addr + l->l_info[DT_INIT]->d_un.d_ptr;
}
/* No initializer for this object.
Mark it so we will skip it in the future. */
l->l_init_called = 1;
return 0;
}
/* Look for the first initializer not yet called. */
l = _dl_loaded->l_next; /* Skip the executable itself. */
do
{
init = next_init (l);
l = l->l_next;
}
while (init == 0 && l);
return init;
}