41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/* Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <malloc.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <dlfcn.h>
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#include <dlldr.h>
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#define NUM_SHARED_OBJECTS 32
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int _dl_numso = NUM_SHARED_OBJECTS;
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DL_SODATA *_dl_sotable = NULL;
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void *
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_dl_open (const char *file, int mode, const void *caller)
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{
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DL_SODATA *new_so;
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void *handle;
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int entry;
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int bsize = _dl_numso * sizeof (DL_INFO);
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DL_INFO *dl_info = malloc (bsize);
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if (dl_info == NULL)
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return NULL;
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/* 1st time thru initial shared object data table. */
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if (_dl_sotable == NULL)
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{
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_dl_sotable = (DL_SODATA *) calloc (_dl_numso, sizeof (DL_SODATA));
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if (_dl_sotable == NULL)
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return NULL;
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__loadx (DL_POSTLOADQ, dl_info, bsize, NULL);
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while (!(dl_info[0].dlinfo_xflags & DL_INFO_OK)
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|| dl_info[0].dlinfo_arraylen == 0)
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{
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bsize *= 2;
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dl_info = realloc (dl_info, bsize);
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if (dl_info == NULL)
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return NULL;
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__loadx (DL_POSTLOADQ, dl_info, bsize, NULL);
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}
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}
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/* Validate mode bits. */
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if (!(mode & RTLD_NOW) && !(mode & RTLD_LAZY))
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{
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free (dl_info);
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errno = EINVAL;
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return NULL;
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}
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/* Load the module. */
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handle = (void *) __loadx (DL_LOAD | DL_LOAD_RTL | DL_LOAD_LDX1,
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dl_info, bsize, file, NULL);
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if (handle == NULL)
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{
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free (dl_info);
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errno = EINVAL;
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return NULL;
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}
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/* Was dl_info buffer to small to get info. */
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while (!(dl_info[0].dlinfo_xflags & DL_INFO_OK)
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|| dl_info[0].dlinfo_arraylen == 0)
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{
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bsize *= 2;
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dl_info = realloc (dl_info, bsize);
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if (dl_info == NULL)
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{
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(void) __unload ((void *) handle);
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errno = ENOMEM;
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return NULL;
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}
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__loadx (DL_POSTLOADQ | DL_LOAD_RTL, dl_info, bsize, handle);
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}
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/* Get an empty entry in the shared object table. */
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for (entry = 0; entry < _dl_numso; ++entry)
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if (_dl_sotable[entry].type == 0)
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break;
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/* See if the table needs to be increased. */
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if (entry == _dl_numso)
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{
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new_so = (DL_SODATA *) realloc (_dl_sotable,
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_dl_numso * 2 * sizeof (DL_SODATA));
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if (new_so == NULL)
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return NULL;
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memset (new_so + _dl_numso, '\0', _dl_numso * sizeof (DL_SODATA));
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_dl_numso *= 2;
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_dl_sotable = new_so;
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}
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/* See if this is syscall (look for /unix in file). */
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if (strcmp ("/unix", file) == 0)
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{
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_dl_sotable[entry].index = dl_info[1].dlinfo_index;
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_dl_sotable[entry].dataorg = dl_info[1].dlinfo_dataorg;
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_dl_sotable[entry].handle = handle;
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_dl_sotable[entry].type = DL_UNIX_SYSCALL;
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}
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else
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{
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_dl_sotable[entry].index = dl_info[1].dlinfo_index;
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_dl_sotable[entry].dataorg = dl_info[1].dlinfo_dataorg;
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_dl_sotable[entry].handle = handle;
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_dl_sotable[entry].type = DL_GETSYM;
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}
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free (dl_info);
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return (void *) entry;
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}
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