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/* Copyright (C) 1999, 2000, 2001 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 <malloc.h>
#include <stdarg.h>
#include <stdlib.h>
#include <sys/types.h>
#include <errno.h>
#include <dlfcn.h>
#include <dlldr.h>
#define NUM_SHARED_OBJECTS 32
int _dl_numso = NUM_SHARED_OBJECTS;
DL_SODATA *_dl_sotable = NULL;
void *
_dl_open (const char *file, int mode, const void *caller)
{
DL_SODATA *new_so;
void *handle;
int entry;
int bsize = _dl_numso * sizeof (DL_INFO);
DL_INFO *dl_info = malloc (bsize);
if (dl_info == NULL)
return NULL;
/* 1st time thru initial shared object data table. */
if (_dl_sotable == NULL)
{
_dl_sotable = (DL_SODATA *) calloc (_dl_numso, sizeof (DL_SODATA));
if (_dl_sotable == NULL)
return NULL;
__loadx (DL_POSTLOADQ, dl_info, bsize, NULL);
while (!(dl_info[0].dlinfo_xflags & DL_INFO_OK)
|| dl_info[0].dlinfo_arraylen == 0)
{
bsize *= 2;
dl_info = realloc (dl_info, bsize);
if (dl_info == NULL)
return NULL;
__loadx (DL_POSTLOADQ, dl_info, bsize, NULL);
}
}
/* Validate mode bits. */
if (!(mode & RTLD_NOW) && !(mode & RTLD_LAZY))
{
free (dl_info);
errno = EINVAL;
return NULL;
}
/* Load the module. */
handle = (void *) __loadx (DL_LOAD | DL_LOAD_RTL | DL_LOAD_LDX1,
dl_info, bsize, file, NULL);
if (handle == NULL)
{
free (dl_info);
errno = EINVAL;
return NULL;
}
/* Was dl_info buffer to small to get info. */
while (!(dl_info[0].dlinfo_xflags & DL_INFO_OK)
|| dl_info[0].dlinfo_arraylen == 0)
{
bsize *= 2;
dl_info = realloc (dl_info, bsize);
if (dl_info == NULL)
{
(void) __unload ((void *) handle);
errno = ENOMEM;
return NULL;
}
__loadx (DL_POSTLOADQ | DL_LOAD_RTL, dl_info, bsize, handle);
}
/* Get an empty entry in the shared object table. */
for (entry = 0; entry < _dl_numso; ++entry)
if (_dl_sotable[entry].type == 0)
break;
/* See if the table needs to be increased. */
if (entry == _dl_numso)
{
new_so = (DL_SODATA *) realloc (_dl_sotable,
_dl_numso * 2 * sizeof (DL_SODATA));
if (new_so == NULL)
return NULL;
memset (new_so + _dl_numso, '\0', _dl_numso * sizeof (DL_SODATA));
_dl_numso *= 2;
_dl_sotable = new_so;
}
/* See if this is syscall (look for /unix in file). */
if (strcmp ("/unix", file) == 0)
{
_dl_sotable[entry].index = dl_info[1].dlinfo_index;
_dl_sotable[entry].dataorg = dl_info[1].dlinfo_dataorg;
_dl_sotable[entry].handle = handle;
_dl_sotable[entry].type = DL_UNIX_SYSCALL;
}
else
{
_dl_sotable[entry].index = dl_info[1].dlinfo_index;
_dl_sotable[entry].dataorg = dl_info[1].dlinfo_dataorg;
_dl_sotable[entry].handle = handle;
_dl_sotable[entry].type = DL_GETSYM;
}
free (dl_info);
return (void *) entry;
}
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