diff options
Diffstat (limited to 'sysdeps/unix/sysv/aix/dl-open.c')
| -rw-r--r-- | sysdeps/unix/sysv/aix/dl-open.c | 132 |
1 files changed, 128 insertions, 4 deletions
diff --git a/sysdeps/unix/sysv/aix/dl-open.c b/sysdeps/unix/sysv/aix/dl-open.c index 50fd7120c5..0189ab465d 100644 --- a/sysdeps/unix/sysv/aix/dl-open.c +++ b/sysdeps/unix/sysv/aix/dl-open.c @@ -1,9 +1,133 @@ -/* XXX The implementation of dlopen should somehow use the __loadx system - call but how? */ +/* 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 * -__libc_dlopen (const char *file) +_dl_open (const char *file, int mode, const void *caller) { - return (void *) 0; + 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 (new_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; } |