785 lines
24 KiB
C
785 lines
24 KiB
C
/* dso_win32.c */
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/*
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* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
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* 2000.
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*/
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/* ====================================================================
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* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include "cryptlib.h"
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#include <openssl/dso.h>
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#if !defined(DSO_WIN32)
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DSO_METHOD *DSO_METHOD_win32(void)
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{
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return NULL;
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}
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#else
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# ifdef _WIN32_WCE
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# if _WIN32_WCE < 300
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static FARPROC GetProcAddressA(HMODULE hModule, LPCSTR lpProcName)
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{
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WCHAR lpProcNameW[64];
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int i;
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for (i = 0; lpProcName[i] && i < 64; i++)
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lpProcNameW[i] = (WCHAR)lpProcName[i];
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if (i == 64)
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return NULL;
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lpProcNameW[i] = 0;
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return GetProcAddressW(hModule, lpProcNameW);
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}
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# endif
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# undef GetProcAddress
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# define GetProcAddress GetProcAddressA
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static HINSTANCE LoadLibraryA(LPCSTR lpLibFileName)
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{
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WCHAR *fnamw;
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size_t len_0 = strlen(lpLibFileName) + 1, i;
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# ifdef _MSC_VER
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fnamw = (WCHAR *)_alloca(len_0 * sizeof(WCHAR));
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# else
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fnamw = (WCHAR *)alloca(len_0 * sizeof(WCHAR));
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# endif
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if (fnamw == NULL) {
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SetLastError(ERROR_NOT_ENOUGH_MEMORY);
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return NULL;
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}
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# if defined(_WIN32_WCE) && _WIN32_WCE>=101
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if (!MultiByteToWideChar(CP_ACP, 0, lpLibFileName, len_0, fnamw, len_0))
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# endif
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for (i = 0; i < len_0; i++)
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fnamw[i] = (WCHAR)lpLibFileName[i];
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return LoadLibraryW(fnamw);
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}
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# endif
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/* Part of the hack in "win32_load" ... */
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# define DSO_MAX_TRANSLATED_SIZE 256
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static int win32_load(DSO *dso);
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static int win32_unload(DSO *dso);
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static void *win32_bind_var(DSO *dso, const char *symname);
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static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname);
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# if 0
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static int win32_unbind_var(DSO *dso, char *symname, void *symptr);
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static int win32_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
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static int win32_init(DSO *dso);
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static int win32_finish(DSO *dso);
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static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg);
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# endif
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static char *win32_name_converter(DSO *dso, const char *filename);
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static char *win32_merger(DSO *dso, const char *filespec1,
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const char *filespec2);
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static int win32_pathbyaddr(void *addr, char *path, int sz);
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static void *win32_globallookup(const char *name);
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static const char *openssl_strnchr(const char *string, int c, size_t len);
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static DSO_METHOD dso_meth_win32 = {
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"OpenSSL 'win32' shared library method",
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win32_load,
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win32_unload,
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win32_bind_var,
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win32_bind_func,
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/* For now, "unbind" doesn't exist */
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# if 0
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NULL, /* unbind_var */
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NULL, /* unbind_func */
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# endif
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NULL, /* ctrl */
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win32_name_converter,
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win32_merger,
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NULL, /* init */
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NULL, /* finish */
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win32_pathbyaddr,
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win32_globallookup
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};
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DSO_METHOD *DSO_METHOD_win32(void)
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{
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return (&dso_meth_win32);
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}
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/*
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* For this DSO_METHOD, our meth_data STACK will contain; (i) a pointer to
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* the handle (HINSTANCE) returned from LoadLibrary(), and copied.
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*/
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static int win32_load(DSO *dso)
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{
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HINSTANCE h = NULL, *p = NULL;
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/* See applicable comments from dso_dl.c */
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char *filename = DSO_convert_filename(dso, NULL);
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if (filename == NULL) {
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DSOerr(DSO_F_WIN32_LOAD, DSO_R_NO_FILENAME);
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goto err;
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}
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h = LoadLibraryA(filename);
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if (h == NULL) {
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DSOerr(DSO_F_WIN32_LOAD, DSO_R_LOAD_FAILED);
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ERR_add_error_data(3, "filename(", filename, ")");
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goto err;
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}
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p = (HINSTANCE *) OPENSSL_malloc(sizeof(HINSTANCE));
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if (p == NULL) {
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DSOerr(DSO_F_WIN32_LOAD, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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*p = h;
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if (!sk_void_push(dso->meth_data, p)) {
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DSOerr(DSO_F_WIN32_LOAD, DSO_R_STACK_ERROR);
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goto err;
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}
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/* Success */
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dso->loaded_filename = filename;
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return (1);
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err:
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/* Cleanup ! */
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if (filename != NULL)
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OPENSSL_free(filename);
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if (p != NULL)
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OPENSSL_free(p);
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if (h != NULL)
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FreeLibrary(h);
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return (0);
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}
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static int win32_unload(DSO *dso)
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{
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HINSTANCE *p;
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if (dso == NULL) {
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DSOerr(DSO_F_WIN32_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
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return (0);
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}
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if (sk_void_num(dso->meth_data) < 1)
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return (1);
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p = sk_void_pop(dso->meth_data);
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if (p == NULL) {
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DSOerr(DSO_F_WIN32_UNLOAD, DSO_R_NULL_HANDLE);
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return (0);
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}
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if (!FreeLibrary(*p)) {
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DSOerr(DSO_F_WIN32_UNLOAD, DSO_R_UNLOAD_FAILED);
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/*
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* We should push the value back onto the stack in case of a retry.
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*/
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sk_void_push(dso->meth_data, p);
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return (0);
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}
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/* Cleanup */
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OPENSSL_free(p);
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return (1);
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}
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/*
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* Using GetProcAddress for variables? TODO: Check this out in the Win32 API
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* docs, there's probably a variant for variables.
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*/
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static void *win32_bind_var(DSO *dso, const char *symname)
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{
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HINSTANCE *ptr;
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void *sym;
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if ((dso == NULL) || (symname == NULL)) {
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DSOerr(DSO_F_WIN32_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
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return (NULL);
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}
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if (sk_void_num(dso->meth_data) < 1) {
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DSOerr(DSO_F_WIN32_BIND_VAR, DSO_R_STACK_ERROR);
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return (NULL);
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}
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ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
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if (ptr == NULL) {
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DSOerr(DSO_F_WIN32_BIND_VAR, DSO_R_NULL_HANDLE);
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return (NULL);
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}
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sym = GetProcAddress(*ptr, symname);
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if (sym == NULL) {
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DSOerr(DSO_F_WIN32_BIND_VAR, DSO_R_SYM_FAILURE);
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ERR_add_error_data(3, "symname(", symname, ")");
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return (NULL);
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}
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return (sym);
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}
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static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
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{
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HINSTANCE *ptr;
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void *sym;
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if ((dso == NULL) || (symname == NULL)) {
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DSOerr(DSO_F_WIN32_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
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return (NULL);
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}
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if (sk_void_num(dso->meth_data) < 1) {
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DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_STACK_ERROR);
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return (NULL);
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}
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ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
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if (ptr == NULL) {
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DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_NULL_HANDLE);
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return (NULL);
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}
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sym = GetProcAddress(*ptr, symname);
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if (sym == NULL) {
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DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_SYM_FAILURE);
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ERR_add_error_data(3, "symname(", symname, ")");
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return (NULL);
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}
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return ((DSO_FUNC_TYPE)sym);
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}
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struct file_st {
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const char *node;
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int nodelen;
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const char *device;
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int devicelen;
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const char *predir;
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int predirlen;
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const char *dir;
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int dirlen;
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const char *file;
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int filelen;
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};
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static struct file_st *win32_splitter(DSO *dso, const char *filename,
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int assume_last_is_dir)
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{
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struct file_st *result = NULL;
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enum { IN_NODE, IN_DEVICE, IN_FILE } position;
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const char *start = filename;
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char last;
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if (!filename) {
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DSOerr(DSO_F_WIN32_SPLITTER, DSO_R_NO_FILENAME);
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/*
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* goto err;
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*/
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return (NULL);
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}
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result = OPENSSL_malloc(sizeof(struct file_st));
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if (result == NULL) {
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DSOerr(DSO_F_WIN32_SPLITTER, ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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memset(result, 0, sizeof(struct file_st));
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position = IN_DEVICE;
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if ((filename[0] == '\\' && filename[1] == '\\')
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|| (filename[0] == '/' && filename[1] == '/')) {
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position = IN_NODE;
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filename += 2;
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start = filename;
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result->node = start;
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}
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do {
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last = filename[0];
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switch (last) {
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case ':':
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if (position != IN_DEVICE) {
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DSOerr(DSO_F_WIN32_SPLITTER, DSO_R_INCORRECT_FILE_SYNTAX);
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/*
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* goto err;
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*/
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OPENSSL_free(result);
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return (NULL);
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}
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result->device = start;
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result->devicelen = (int)(filename - start);
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position = IN_FILE;
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start = ++filename;
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result->dir = start;
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break;
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case '\\':
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case '/':
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if (position == IN_NODE) {
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result->nodelen = (int)(filename - start);
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position = IN_FILE;
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start = ++filename;
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result->dir = start;
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} else if (position == IN_DEVICE) {
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position = IN_FILE;
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filename++;
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result->dir = start;
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result->dirlen = (int)(filename - start);
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start = filename;
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} else {
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filename++;
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result->dirlen += (int)(filename - start);
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start = filename;
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}
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break;
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case '\0':
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if (position == IN_NODE) {
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result->nodelen = (int)(filename - start);
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} else {
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if (filename - start > 0) {
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if (assume_last_is_dir) {
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if (position == IN_DEVICE) {
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result->dir = start;
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result->dirlen = 0;
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}
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result->dirlen += (int)(filename - start);
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} else {
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result->file = start;
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result->filelen = (int)(filename - start);
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}
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}
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}
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break;
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default:
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filename++;
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break;
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}
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}
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while (last);
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if (!result->nodelen)
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result->node = NULL;
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if (!result->devicelen)
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result->device = NULL;
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if (!result->dirlen)
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result->dir = NULL;
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if (!result->filelen)
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result->file = NULL;
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return (result);
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}
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static char *win32_joiner(DSO *dso, const struct file_st *file_split)
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{
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int len = 0, offset = 0;
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char *result = NULL;
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const char *start;
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if (!file_split) {
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DSOerr(DSO_F_WIN32_JOINER, ERR_R_PASSED_NULL_PARAMETER);
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return (NULL);
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}
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if (file_split->node) {
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len += 2 + file_split->nodelen; /* 2 for starting \\ */
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if (file_split->predir || file_split->dir || file_split->file)
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len++; /* 1 for ending \ */
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} else if (file_split->device) {
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len += file_split->devicelen + 1; /* 1 for ending : */
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}
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len += file_split->predirlen;
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if (file_split->predir && (file_split->dir || file_split->file)) {
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len++; /* 1 for ending \ */
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}
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len += file_split->dirlen;
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if (file_split->dir && file_split->file) {
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len++; /* 1 for ending \ */
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}
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len += file_split->filelen;
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if (!len) {
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DSOerr(DSO_F_WIN32_JOINER, DSO_R_EMPTY_FILE_STRUCTURE);
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return (NULL);
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}
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result = OPENSSL_malloc(len + 1);
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if (!result) {
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DSOerr(DSO_F_WIN32_JOINER, ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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if (file_split->node) {
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strcpy(&result[offset], "\\\\");
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offset += 2;
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strncpy(&result[offset], file_split->node, file_split->nodelen);
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offset += file_split->nodelen;
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if (file_split->predir || file_split->dir || file_split->file) {
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result[offset] = '\\';
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offset++;
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}
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} else if (file_split->device) {
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strncpy(&result[offset], file_split->device, file_split->devicelen);
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offset += file_split->devicelen;
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result[offset] = ':';
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offset++;
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}
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start = file_split->predir;
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while (file_split->predirlen > (start - file_split->predir)) {
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const char *end = openssl_strnchr(start, '/',
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file_split->predirlen - (start -
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file_split->predir));
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if (!end)
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end = start
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+ file_split->predirlen - (start - file_split->predir);
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strncpy(&result[offset], start, end - start);
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offset += (int)(end - start);
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result[offset] = '\\';
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offset++;
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start = end + 1;
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}
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# if 0 /* Not needed, since the directory converter
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* above already appeneded a backslash */
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if (file_split->predir && (file_split->dir || file_split->file)) {
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result[offset] = '\\';
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offset++;
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}
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# endif
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start = file_split->dir;
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while (file_split->dirlen > (start - file_split->dir)) {
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const char *end = openssl_strnchr(start, '/',
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file_split->dirlen - (start -
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file_split->dir));
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if (!end)
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end = start + file_split->dirlen - (start - file_split->dir);
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strncpy(&result[offset], start, end - start);
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offset += (int)(end - start);
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result[offset] = '\\';
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offset++;
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start = end + 1;
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}
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# if 0 /* Not needed, since the directory converter
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* above already appeneded a backslash */
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if (file_split->dir && file_split->file) {
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result[offset] = '\\';
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offset++;
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}
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# endif
|
|
strncpy(&result[offset], file_split->file, file_split->filelen);
|
|
offset += file_split->filelen;
|
|
result[offset] = '\0';
|
|
return (result);
|
|
}
|
|
|
|
static char *win32_merger(DSO *dso, const char *filespec1,
|
|
const char *filespec2)
|
|
{
|
|
char *merged = NULL;
|
|
struct file_st *filespec1_split = NULL;
|
|
struct file_st *filespec2_split = NULL;
|
|
|
|
if (!filespec1 && !filespec2) {
|
|
DSOerr(DSO_F_WIN32_MERGER, ERR_R_PASSED_NULL_PARAMETER);
|
|
return (NULL);
|
|
}
|
|
if (!filespec2) {
|
|
merged = OPENSSL_malloc(strlen(filespec1) + 1);
|
|
if (!merged) {
|
|
DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
|
|
return (NULL);
|
|
}
|
|
strcpy(merged, filespec1);
|
|
} else if (!filespec1) {
|
|
merged = OPENSSL_malloc(strlen(filespec2) + 1);
|
|
if (!merged) {
|
|
DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
|
|
return (NULL);
|
|
}
|
|
strcpy(merged, filespec2);
|
|
} else {
|
|
filespec1_split = win32_splitter(dso, filespec1, 0);
|
|
if (!filespec1_split) {
|
|
DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
|
|
return (NULL);
|
|
}
|
|
filespec2_split = win32_splitter(dso, filespec2, 1);
|
|
if (!filespec2_split) {
|
|
DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
|
|
OPENSSL_free(filespec1_split);
|
|
return (NULL);
|
|
}
|
|
|
|
/* Fill in into filespec1_split */
|
|
if (!filespec1_split->node && !filespec1_split->device) {
|
|
filespec1_split->node = filespec2_split->node;
|
|
filespec1_split->nodelen = filespec2_split->nodelen;
|
|
filespec1_split->device = filespec2_split->device;
|
|
filespec1_split->devicelen = filespec2_split->devicelen;
|
|
}
|
|
if (!filespec1_split->dir) {
|
|
filespec1_split->dir = filespec2_split->dir;
|
|
filespec1_split->dirlen = filespec2_split->dirlen;
|
|
} else if (filespec1_split->dir[0] != '\\'
|
|
&& filespec1_split->dir[0] != '/') {
|
|
filespec1_split->predir = filespec2_split->dir;
|
|
filespec1_split->predirlen = filespec2_split->dirlen;
|
|
}
|
|
if (!filespec1_split->file) {
|
|
filespec1_split->file = filespec2_split->file;
|
|
filespec1_split->filelen = filespec2_split->filelen;
|
|
}
|
|
|
|
merged = win32_joiner(dso, filespec1_split);
|
|
}
|
|
OPENSSL_free(filespec1_split);
|
|
OPENSSL_free(filespec2_split);
|
|
return (merged);
|
|
}
|
|
|
|
static char *win32_name_converter(DSO *dso, const char *filename)
|
|
{
|
|
char *translated;
|
|
int len, transform;
|
|
|
|
len = strlen(filename);
|
|
transform = ((strstr(filename, "/") == NULL) &&
|
|
(strstr(filename, "\\") == NULL) &&
|
|
(strstr(filename, ":") == NULL));
|
|
if (transform)
|
|
/* We will convert this to "%s.dll" */
|
|
translated = OPENSSL_malloc(len + 5);
|
|
else
|
|
/* We will simply duplicate filename */
|
|
translated = OPENSSL_malloc(len + 1);
|
|
if (translated == NULL) {
|
|
DSOerr(DSO_F_WIN32_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
|
|
return (NULL);
|
|
}
|
|
if (transform)
|
|
sprintf(translated, "%s.dll", filename);
|
|
else
|
|
sprintf(translated, "%s", filename);
|
|
return (translated);
|
|
}
|
|
|
|
static const char *openssl_strnchr(const char *string, int c, size_t len)
|
|
{
|
|
size_t i;
|
|
const char *p;
|
|
for (i = 0, p = string; i < len && *p; i++, p++) {
|
|
if (*p == c)
|
|
return p;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
# include <tlhelp32.h>
|
|
# ifdef _WIN32_WCE
|
|
# define DLLNAME "TOOLHELP.DLL"
|
|
# else
|
|
# ifdef MODULEENTRY32
|
|
# undef MODULEENTRY32 /* unmask the ASCII version! */
|
|
# endif
|
|
# define DLLNAME "KERNEL32.DLL"
|
|
# endif
|
|
|
|
typedef HANDLE(WINAPI *CREATETOOLHELP32SNAPSHOT) (DWORD, DWORD);
|
|
typedef BOOL(WINAPI *CLOSETOOLHELP32SNAPSHOT) (HANDLE);
|
|
typedef BOOL(WINAPI *MODULE32) (HANDLE, MODULEENTRY32 *);
|
|
|
|
static int win32_pathbyaddr(void *addr, char *path, int sz)
|
|
{
|
|
HMODULE dll;
|
|
HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
|
|
MODULEENTRY32 me32;
|
|
CREATETOOLHELP32SNAPSHOT create_snap;
|
|
CLOSETOOLHELP32SNAPSHOT close_snap;
|
|
MODULE32 module_first, module_next;
|
|
int len;
|
|
|
|
if (addr == NULL) {
|
|
union {
|
|
int (*f) (void *, char *, int);
|
|
void *p;
|
|
} t = {
|
|
win32_pathbyaddr
|
|
};
|
|
addr = t.p;
|
|
}
|
|
|
|
dll = LoadLibrary(TEXT(DLLNAME));
|
|
if (dll == NULL) {
|
|
DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_UNSUPPORTED);
|
|
return -1;
|
|
}
|
|
|
|
create_snap = (CREATETOOLHELP32SNAPSHOT)
|
|
GetProcAddress(dll, "CreateToolhelp32Snapshot");
|
|
if (create_snap == NULL) {
|
|
FreeLibrary(dll);
|
|
DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_UNSUPPORTED);
|
|
return -1;
|
|
}
|
|
/* We take the rest for granted... */
|
|
# ifdef _WIN32_WCE
|
|
close_snap = (CLOSETOOLHELP32SNAPSHOT)
|
|
GetProcAddress(dll, "CloseToolhelp32Snapshot");
|
|
# else
|
|
close_snap = (CLOSETOOLHELP32SNAPSHOT) CloseHandle;
|
|
# endif
|
|
module_first = (MODULE32) GetProcAddress(dll, "Module32First");
|
|
module_next = (MODULE32) GetProcAddress(dll, "Module32Next");
|
|
|
|
hModuleSnap = (*create_snap) (TH32CS_SNAPMODULE, 0);
|
|
if (hModuleSnap == INVALID_HANDLE_VALUE) {
|
|
FreeLibrary(dll);
|
|
DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_UNSUPPORTED);
|
|
return -1;
|
|
}
|
|
|
|
me32.dwSize = sizeof(me32);
|
|
|
|
if (!(*module_first) (hModuleSnap, &me32)) {
|
|
(*close_snap) (hModuleSnap);
|
|
FreeLibrary(dll);
|
|
DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_FAILURE);
|
|
return -1;
|
|
}
|
|
|
|
do {
|
|
if ((BYTE *) addr >= me32.modBaseAddr &&
|
|
(BYTE *) addr < me32.modBaseAddr + me32.modBaseSize) {
|
|
(*close_snap) (hModuleSnap);
|
|
FreeLibrary(dll);
|
|
# ifdef _WIN32_WCE
|
|
# if _WIN32_WCE >= 101
|
|
return WideCharToMultiByte(CP_ACP, 0, me32.szExePath, -1,
|
|
path, sz, NULL, NULL);
|
|
# else
|
|
len = (int)wcslen(me32.szExePath);
|
|
if (sz <= 0)
|
|
return len + 1;
|
|
if (len >= sz)
|
|
len = sz - 1;
|
|
for (i = 0; i < len; i++)
|
|
path[i] = (char)me32.szExePath[i];
|
|
path[len++] = 0;
|
|
return len;
|
|
# endif
|
|
# else
|
|
len = (int)strlen(me32.szExePath);
|
|
if (sz <= 0)
|
|
return len + 1;
|
|
if (len >= sz)
|
|
len = sz - 1;
|
|
memcpy(path, me32.szExePath, len);
|
|
path[len++] = 0;
|
|
return len;
|
|
# endif
|
|
}
|
|
} while ((*module_next) (hModuleSnap, &me32));
|
|
|
|
(*close_snap) (hModuleSnap);
|
|
FreeLibrary(dll);
|
|
return 0;
|
|
}
|
|
|
|
static void *win32_globallookup(const char *name)
|
|
{
|
|
HMODULE dll;
|
|
HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
|
|
MODULEENTRY32 me32;
|
|
CREATETOOLHELP32SNAPSHOT create_snap;
|
|
CLOSETOOLHELP32SNAPSHOT close_snap;
|
|
MODULE32 module_first, module_next;
|
|
FARPROC ret = NULL;
|
|
|
|
dll = LoadLibrary(TEXT(DLLNAME));
|
|
if (dll == NULL) {
|
|
DSOerr(DSO_F_WIN32_GLOBALLOOKUP, DSO_R_UNSUPPORTED);
|
|
return NULL;
|
|
}
|
|
|
|
create_snap = (CREATETOOLHELP32SNAPSHOT)
|
|
GetProcAddress(dll, "CreateToolhelp32Snapshot");
|
|
if (create_snap == NULL) {
|
|
FreeLibrary(dll);
|
|
DSOerr(DSO_F_WIN32_GLOBALLOOKUP, DSO_R_UNSUPPORTED);
|
|
return NULL;
|
|
}
|
|
/* We take the rest for granted... */
|
|
# ifdef _WIN32_WCE
|
|
close_snap = (CLOSETOOLHELP32SNAPSHOT)
|
|
GetProcAddress(dll, "CloseToolhelp32Snapshot");
|
|
# else
|
|
close_snap = (CLOSETOOLHELP32SNAPSHOT) CloseHandle;
|
|
# endif
|
|
module_first = (MODULE32) GetProcAddress(dll, "Module32First");
|
|
module_next = (MODULE32) GetProcAddress(dll, "Module32Next");
|
|
|
|
hModuleSnap = (*create_snap) (TH32CS_SNAPMODULE, 0);
|
|
if (hModuleSnap == INVALID_HANDLE_VALUE) {
|
|
FreeLibrary(dll);
|
|
DSOerr(DSO_F_WIN32_GLOBALLOOKUP, DSO_R_UNSUPPORTED);
|
|
return NULL;
|
|
}
|
|
|
|
me32.dwSize = sizeof(me32);
|
|
|
|
if (!(*module_first) (hModuleSnap, &me32)) {
|
|
(*close_snap) (hModuleSnap);
|
|
FreeLibrary(dll);
|
|
return NULL;
|
|
}
|
|
|
|
do {
|
|
if ((ret = GetProcAddress(me32.hModule, name))) {
|
|
(*close_snap) (hModuleSnap);
|
|
FreeLibrary(dll);
|
|
return ret;
|
|
}
|
|
} while ((*module_next) (hModuleSnap, &me32));
|
|
|
|
(*close_snap) (hModuleSnap);
|
|
FreeLibrary(dll);
|
|
return NULL;
|
|
}
|
|
#endif /* DSO_WIN32 */
|