diff options
Diffstat (limited to 'thirdparty/openssl/crypto/dso/dso_win32.c')
| -rw-r--r-- | thirdparty/openssl/crypto/dso/dso_win32.c | 788 |
1 files changed, 788 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/dso/dso_win32.c b/thirdparty/openssl/crypto/dso/dso_win32.c new file mode 100644 index 0000000000..706e754a3f --- /dev/null +++ b/thirdparty/openssl/crypto/dso/dso_win32.c @@ -0,0 +1,788 @@ +/* dso_win32.c */ +/* + * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project + * 2000. + */ +/* ==================================================================== + * Copyright (c) 2000 The OpenSSL Project. All rights reserved. + * + * 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. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * licensing@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 THE OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <stdio.h> +#include <string.h> +#include "cryptlib.h" +#include <openssl/dso.h> + +#if !defined(DSO_WIN32) +DSO_METHOD *DSO_METHOD_win32(void) +{ + return NULL; +} +#else + +# ifdef _WIN32_WCE +# if _WIN32_WCE < 300 +static FARPROC GetProcAddressA(HMODULE hModule, LPCSTR lpProcName) +{ + WCHAR lpProcNameW[64]; + int i; + + for (i = 0; lpProcName[i] && i < 64; i++) + lpProcNameW[i] = (WCHAR)lpProcName[i]; + if (i == 64) + return NULL; + lpProcNameW[i] = 0; + + return GetProcAddressW(hModule, lpProcNameW); +} +# endif +# undef GetProcAddress +# define GetProcAddress GetProcAddressA + +static HINSTANCE LoadLibraryA(LPCSTR lpLibFileName) +{ + WCHAR *fnamw; + size_t len_0 = strlen(lpLibFileName) + 1, i; + +# ifdef _MSC_VER + fnamw = (WCHAR *)_alloca(len_0 * sizeof(WCHAR)); +# else + fnamw = (WCHAR *)alloca(len_0 * sizeof(WCHAR)); +# endif + if (fnamw == NULL) { + SetLastError(ERROR_NOT_ENOUGH_MEMORY); + return NULL; + } +# if defined(_WIN32_WCE) && _WIN32_WCE>=101 + if (!MultiByteToWideChar(CP_ACP, 0, lpLibFileName, len_0, fnamw, len_0)) +# endif + for (i = 0; i < len_0; i++) + fnamw[i] = (WCHAR)lpLibFileName[i]; + + return LoadLibraryW(fnamw); +} +# endif + +/* Part of the hack in "win32_load" ... */ +# define DSO_MAX_TRANSLATED_SIZE 256 + +static int win32_load(DSO *dso); +static int win32_unload(DSO *dso); +static void *win32_bind_var(DSO *dso, const char *symname); +static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname); +# if 0 +static int win32_unbind_var(DSO *dso, char *symname, void *symptr); +static int win32_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr); +static int win32_init(DSO *dso); +static int win32_finish(DSO *dso); +static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg); +# endif +static char *win32_name_converter(DSO *dso, const char *filename); +static char *win32_merger(DSO *dso, const char *filespec1, + const char *filespec2); +static int win32_pathbyaddr(void *addr, char *path, int sz); +static void *win32_globallookup(const char *name); + +static const char *openssl_strnchr(const char *string, int c, size_t len); + +static DSO_METHOD dso_meth_win32 = { + "OpenSSL 'win32' shared library method", + win32_load, + win32_unload, + win32_bind_var, + win32_bind_func, +/* For now, "unbind" doesn't exist */ +# if 0 + NULL, /* unbind_var */ + NULL, /* unbind_func */ +# endif + NULL, /* ctrl */ + win32_name_converter, + win32_merger, + NULL, /* init */ + NULL, /* finish */ + win32_pathbyaddr, + win32_globallookup +}; + +DSO_METHOD *DSO_METHOD_win32(void) +{ + return (&dso_meth_win32); +} + +/* + * For this DSO_METHOD, our meth_data STACK will contain; (i) a pointer to + * the handle (HINSTANCE) returned from LoadLibrary(), and copied. + */ + +static int win32_load(DSO *dso) +{ + HINSTANCE h = NULL, *p = NULL; + /* See applicable comments from dso_dl.c */ + char *filename = DSO_convert_filename(dso, NULL); + + if (filename == NULL) { + DSOerr(DSO_F_WIN32_LOAD, DSO_R_NO_FILENAME); + goto err; + } + h = LoadLibraryA(filename); + if (h == NULL) { + DSOerr(DSO_F_WIN32_LOAD, DSO_R_LOAD_FAILED); + ERR_add_error_data(3, "filename(", filename, ")"); + goto err; + } + p = (HINSTANCE *) OPENSSL_malloc(sizeof(HINSTANCE)); + if (p == NULL) { + DSOerr(DSO_F_WIN32_LOAD, ERR_R_MALLOC_FAILURE); + goto err; + } + *p = h; + if (!sk_void_push(dso->meth_data, p)) { + DSOerr(DSO_F_WIN32_LOAD, DSO_R_STACK_ERROR); + goto err; + } + /* Success */ + dso->loaded_filename = filename; + return (1); + err: + /* Cleanup ! */ + if (filename != NULL) + OPENSSL_free(filename); + if (p != NULL) + OPENSSL_free(p); + if (h != NULL) + FreeLibrary(h); + return (0); +} + +static int win32_unload(DSO *dso) +{ + HINSTANCE *p; + if (dso == NULL) { + DSOerr(DSO_F_WIN32_UNLOAD, ERR_R_PASSED_NULL_PARAMETER); + return (0); + } + if (sk_void_num(dso->meth_data) < 1) + return (1); + p = sk_void_pop(dso->meth_data); + if (p == NULL) { + DSOerr(DSO_F_WIN32_UNLOAD, DSO_R_NULL_HANDLE); + return (0); + } + if (!FreeLibrary(*p)) { + DSOerr(DSO_F_WIN32_UNLOAD, DSO_R_UNLOAD_FAILED); + /* + * We should push the value back onto the stack in case of a retry. + */ + sk_void_push(dso->meth_data, p); + return (0); + } + /* Cleanup */ + OPENSSL_free(p); + return (1); +} + +/* + * Using GetProcAddress for variables? TODO: Check this out in the Win32 API + * docs, there's probably a variant for variables. + */ +static void *win32_bind_var(DSO *dso, const char *symname) +{ + HINSTANCE *ptr; + void *sym; + + if ((dso == NULL) || (symname == NULL)) { + DSOerr(DSO_F_WIN32_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER); + return (NULL); + } + if (sk_void_num(dso->meth_data) < 1) { + DSOerr(DSO_F_WIN32_BIND_VAR, DSO_R_STACK_ERROR); + return (NULL); + } + ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1); + if (ptr == NULL) { + DSOerr(DSO_F_WIN32_BIND_VAR, DSO_R_NULL_HANDLE); + return (NULL); + } + sym = GetProcAddress(*ptr, symname); + if (sym == NULL) { + DSOerr(DSO_F_WIN32_BIND_VAR, DSO_R_SYM_FAILURE); + ERR_add_error_data(3, "symname(", symname, ")"); + return (NULL); + } + return (sym); +} + +static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname) +{ + HINSTANCE *ptr; + void *sym; + + if ((dso == NULL) || (symname == NULL)) { + DSOerr(DSO_F_WIN32_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER); + return (NULL); + } + if (sk_void_num(dso->meth_data) < 1) { + DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_STACK_ERROR); + return (NULL); + } + ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1); + if (ptr == NULL) { + DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_NULL_HANDLE); + return (NULL); + } + sym = GetProcAddress(*ptr, symname); + if (sym == NULL) { + DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_SYM_FAILURE); + ERR_add_error_data(3, "symname(", symname, ")"); + return (NULL); + } + return ((DSO_FUNC_TYPE)sym); +} + +struct file_st { + const char *node; + int nodelen; + const char *device; + int devicelen; + const char *predir; + int predirlen; + const char *dir; + int dirlen; + const char *file; + int filelen; +}; + +static struct file_st *win32_splitter(DSO *dso, const char *filename, + int assume_last_is_dir) +{ + struct file_st *result = NULL; + enum { IN_NODE, IN_DEVICE, IN_FILE } position; + const char *start = filename; + char last; + + if (!filename) { + DSOerr(DSO_F_WIN32_SPLITTER, DSO_R_NO_FILENAME); + /* + * goto err; + */ + return (NULL); + } + + result = OPENSSL_malloc(sizeof(struct file_st)); + if (result == NULL) { + DSOerr(DSO_F_WIN32_SPLITTER, ERR_R_MALLOC_FAILURE); + return (NULL); + } + + memset(result, 0, sizeof(struct file_st)); + position = IN_DEVICE; + + if ((filename[0] == '\\' && filename[1] == '\\') + || (filename[0] == '/' && filename[1] == '/')) { + position = IN_NODE; + filename += 2; + start = filename; + result->node = start; + } + + do { + last = filename[0]; + switch (last) { + case ':': + if (position != IN_DEVICE) { + DSOerr(DSO_F_WIN32_SPLITTER, DSO_R_INCORRECT_FILE_SYNTAX); + /* + * goto err; + */ + OPENSSL_free(result); + return (NULL); + } + result->device = start; + result->devicelen = (int)(filename - start); + position = IN_FILE; + start = ++filename; + result->dir = start; + break; + case '\\': + case '/': + if (position == IN_NODE) { + result->nodelen = (int)(filename - start); + position = IN_FILE; + start = ++filename; + result->dir = start; + } else if (position == IN_DEVICE) { + position = IN_FILE; + filename++; + result->dir = start; + result->dirlen = (int)(filename - start); + start = filename; + } else { + filename++; + result->dirlen += (int)(filename - start); + start = filename; + } + break; + case '\0': + if (position == IN_NODE) { + result->nodelen = (int)(filename - start); + } else { + if (filename - start > 0) { + if (assume_last_is_dir) { + if (position == IN_DEVICE) { + result->dir = start; + result->dirlen = 0; + } + result->dirlen += (int)(filename - start); + } else { + result->file = start; + result->filelen = (int)(filename - start); + } + } + } + break; + default: + filename++; + break; + } + } + while (last); + + if (!result->nodelen) + result->node = NULL; + if (!result->devicelen) + result->device = NULL; + if (!result->dirlen) + result->dir = NULL; + if (!result->filelen) + result->file = NULL; + + return (result); +} + +static char *win32_joiner(DSO *dso, const struct file_st *file_split) +{ + int len = 0, offset = 0; + char *result = NULL; + const char *start; + + if (!file_split) { + DSOerr(DSO_F_WIN32_JOINER, ERR_R_PASSED_NULL_PARAMETER); + return (NULL); + } + if (file_split->node) { + len += 2 + file_split->nodelen; /* 2 for starting \\ */ + if (file_split->predir || file_split->dir || file_split->file) + len++; /* 1 for ending \ */ + } else if (file_split->device) { + len += file_split->devicelen + 1; /* 1 for ending : */ + } + len += file_split->predirlen; + if (file_split->predir && (file_split->dir || file_split->file)) { + len++; /* 1 for ending \ */ + } + len += file_split->dirlen; + if (file_split->dir && file_split->file) { + len++; /* 1 for ending \ */ + } + len += file_split->filelen; + + if (!len) { + DSOerr(DSO_F_WIN32_JOINER, DSO_R_EMPTY_FILE_STRUCTURE); + return (NULL); + } + + result = OPENSSL_malloc(len + 1); + if (!result) { + DSOerr(DSO_F_WIN32_JOINER, ERR_R_MALLOC_FAILURE); + return (NULL); + } + + if (file_split->node) { + strcpy(&result[offset], "\\\\"); + offset += 2; + strncpy(&result[offset], file_split->node, file_split->nodelen); + offset += file_split->nodelen; + if (file_split->predir || file_split->dir || file_split->file) { + result[offset] = '\\'; + offset++; + } + } else if (file_split->device) { + strncpy(&result[offset], file_split->device, file_split->devicelen); + offset += file_split->devicelen; + result[offset] = ':'; + offset++; + } + start = file_split->predir; + while (file_split->predirlen > (start - file_split->predir)) { + const char *end = openssl_strnchr(start, '/', + file_split->predirlen - (start - + file_split->predir)); + if (!end) + end = start + + file_split->predirlen - (start - file_split->predir); + strncpy(&result[offset], start, end - start); + offset += (int)(end - start); + result[offset] = '\\'; + offset++; + start = end + 1; + } +# if 0 /* Not needed, since the directory converter + * above already appeneded a backslash */ + if (file_split->predir && (file_split->dir || file_split->file)) { + result[offset] = '\\'; + offset++; + } +# endif + start = file_split->dir; + while (file_split->dirlen > (start - file_split->dir)) { + const char *end = openssl_strnchr(start, '/', + file_split->dirlen - (start - + file_split->dir)); + if (!end) + end = start + file_split->dirlen - (start - file_split->dir); + strncpy(&result[offset], start, end - start); + offset += (int)(end - start); + result[offset] = '\\'; + offset++; + start = end + 1; + } +# if 0 /* Not needed, since the directory converter + * above already appeneded a backslash */ + if (file_split->dir && file_split->file) { + result[offset] = '\\'; + offset++; + } +# 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; + + 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 + { + int i, 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 + { + int 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 */ |