/* * dlf.h * * $Id: dlf.h,v 1.7 2004/11/11 01:52:37 luesang Exp $ * * Dynamic Library Loader (mapping to SVR4) * * The iODBC driver manager. * * Copyright (C) 1995 by Ke Jin <kejin@empress.com> * Copyright (C) 1996-2002 by OpenLink Software <iodbc@openlinksw.com> * All Rights Reserved. * * This software is released under the terms of either of the following * licenses: * * - GNU Library General Public License (see LICENSE.LGPL) * - The BSD License (see LICENSE.BSD). * * While not mandated by the BSD license, any patches you make to the * iODBC source code may be contributed back into the iODBC project * at your discretion. Contributions will benefit the Open Source and * Data Access community as a whole. Submissions may be made at: * * http://www.iodbc.org * * * GNU Library Generic Public License Version 2 * ============================================ * This 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. * * This 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 this library; if not, write to the Free * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * The BSD License * =============== * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name of OpenLink Software Inc. nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL OPENLINK OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _DLF_H #define _DLF_H #include <iodbc.h> #if defined(HAVE_SHL_LOAD) #define DLDAPI_HP_SHL #elif defined(HAVE_LIBDL) #define DLDAPI_SVR4_DLFCN #elif defined(HAVE_DYLD) #define DLDAPI_MACX #endif #if defined(DLDAPI_SVR4_DLFCN) #include <dlfcn.h> #elif defined(DLDAPI_AIX_LOAD) #include <dlfcn.h> #elif defined(DLDAPI_VMS_IODBC) extern void *iodbc_dlopen (char * path, int mode); extern void *iodbc_dlsym (void * hdll, char * sym); extern char *iodbc_dlerror (); extern int iodbc_dlclose (void * hdll); #else extern void *dlopen (char * path, int mode); extern void *dlsym (void * hdll, char * sym); extern char *dlerror (); extern int dlclose (void * hdll); #endif #ifdef DLDAPI_MACX #include <stdio.h> #include <stdlib.h> #include <string.h> #include <errno.h> #include <sys/types.h> #include <sys/stat.h> #include "mach-o/dyld.h" #define RTLD_LAZY 0x1 #define RTLD_NOW 0x2 #define RTLD_LOCAL 0x4 #define RTLD_GLOBAL 0x8 #define RTLD_NOLOAD 0x10 #define RTLD_SHARED 0x20 /* not used, the default */ #define RTLD_UNSHARED 0x40 #define RTLD_NODELETE 0x80 #define RTLD_LAZY_UNDEF 0x100 enum ofile_type { OFILE_UNKNOWN, OFILE_FAT, OFILE_ARCHIVE, OFILE_Mach_O }; enum byte_sex { UNKNOWN_BYTE_SEX, BIG_ENDIAN_BYTE_SEX, LITTLE_ENDIAN_BYTE_SEX }; /* * The structure describing an architecture flag with the string of the flag * name, and the cputype and cpusubtype. */ struct arch_flag { char *name; cpu_type_t cputype; cpu_subtype_t cpusubtype; }; /* * The structure used by ofile_*() routines for object files. */ struct ofile { char *file_name; /* pointer to name malloc'ed by ofile_map */ char *file_addr; /* pointer to vm_allocate'ed memory */ unsigned long file_size; /* size of vm_allocate'ed memory */ enum ofile_type file_type; /* type of the file */ struct fat_header *fat_header; /* If a fat file these are filled in and */ struct fat_arch *fat_archs; /* if needed converted to host byte sex */ /* * If this is a fat file then these are valid and filled in */ unsigned long narch; /* the current architecture */ enum ofile_type arch_type; /* the type of file for this arch. */ struct arch_flag arch_flag; /* the arch_flag for this arch, the name */ /* field is pointing at space malloc'ed */ /* by ofile_map. */ /* * If this structure is currently referencing an archive member or * an object file that is an archive member these are valid and filled in. */ unsigned long member_offset; /* logical offset to the member starting */ char *member_addr; /* pointer to the member contents */ unsigned long member_size; /* actual size of the member (not rounded)*/ struct ar_hdr *member_ar_hdr; /* pointer to the ar_hdr for this member */ char *member_name; /* name of this member */ unsigned long member_name_size; /* size of the member name */ enum ofile_type member_type; /* the type of file for this member */ cpu_type_t archive_cputype; /* if the archive contains objects then */ cpu_subtype_t /* these two fields reflect the object */ archive_cpusubtype; /* at are in the archive. */ /* * If this structure is currently referencing a dynamic library module * these are valid and filled in. */ struct dylib_module *modtab; /* the module table */ unsigned long nmodtab; /* the number of module table entries */ struct dylib_module /* pointer to the dylib_module for this */ *dylib_module; /* module */ char *dylib_module_name; /* the name of the module */ /* * If this structure is currently referencing an object file these are * valid and filled in. The mach_header and load commands have been * converted to the host byte sex if needed */ char *object_addr; /* the address of the object file */ unsigned long object_size; /* the size of the object file */ enum byte_sex object_byte_sex; /* the byte sex of the object file */ struct mach_header *mh; /* the mach_header of the object file */ struct load_command /* the start of the load commands */ *load_commands; }; /* * The structure of a dlopen() handle. */ struct dlopen_handle { dev_t dev; /* the path's device and inode number from stat(2) */ ino_t ino; int dlopen_mode; /* current dlopen mode for this handle */ int dlopen_count; /* number of times dlopen() called on this handle */ NSModule module; /* the NSModule returned by NSLinkModule() */ struct dlopen_handle *prev; struct dlopen_handle *next; }; #endif /* DLDAPI_MACX */ #ifndef RTLD_LOCAL #define RTLD_LOCAL 0 /* Only if not defined by dlfcn.h */ #endif #ifndef RTLD_LAZY #define RTLD_LAZY 1 #endif #ifdef RTLD_NOW #define OPL_DL_MODE (RTLD_NOW | RTLD_LOCAL) #else #define OPL_DL_MODE (RTLD_LAZY | RTLD_LOCAL) #endif #if defined(DLDAPI_VMS_IODBC) #define DLL_OPEN(dll) (void*)iodbc_dlopen((char*)(dll), OPL_DL_MODE) #define DLL_PROC(hdll, sym) (void*)iodbc_dlsym((void*)(hdll), (char*)sym) #define DLL_ERROR() (char*)iodbc_dlerror() #define DLL_CLOSE(hdll) iodbc_dlclose((void*)(hdll)) #else #define DLL_OPEN(dll) (void*)dlopen((char*)(dll), OPL_DL_MODE) #define DLL_PROC(hdll, sym) (void*)dlsym((void*)(hdll), (char*)sym) #define DLL_ERROR() (char*)dlerror() #define DLL_CLOSE(hdll) dlclose((void*)(hdll)) #endif #endif /* _DLF_H */