1 /* dso_dl.c -*- mode:C; c-file-style: "eay" -*- */
3 * Written by Richard Levitte (richard@levitte.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
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37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
61 #include "internal/cryptlib.h"
62 #include <openssl/dso.h>
65 DSO_METHOD *DSO_METHOD_dl(void)
73 /* Part of the hack in "dl_load" ... */
74 # define DSO_MAX_TRANSLATED_SIZE 256
76 static int dl_load(DSO *dso);
77 static int dl_unload(DSO *dso);
78 static void *dl_bind_var(DSO *dso, const char *symname);
79 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname);
80 static char *dl_name_converter(DSO *dso, const char *filename);
81 static char *dl_merger(DSO *dso, const char *filespec1,
82 const char *filespec2);
83 static int dl_pathbyaddr(void *addr, char *path, int sz);
84 static void *dl_globallookup(const char *name);
86 static DSO_METHOD dso_meth_dl = {
87 "OpenSSL 'dl' shared library method",
101 DSO_METHOD *DSO_METHOD_dl(void)
103 return (&dso_meth_dl);
107 * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
108 * (shl_t) returned from shl_load(). NB: I checked on HPUX11 and shl_t is
109 * itself a pointer type so the cast is safe.
112 static int dl_load(DSO *dso)
116 * We don't do any fancy retries or anything, just take the method's (or
117 * DSO's if it has the callback set) best translation of the
118 * platform-independent filename and try once with that.
120 char *filename = DSO_convert_filename(dso, NULL);
122 if (filename == NULL) {
123 DSOerr(DSO_F_DL_LOAD, DSO_R_NO_FILENAME);
126 ptr = shl_load(filename, BIND_IMMEDIATE |
127 (dso->flags & DSO_FLAG_NO_NAME_TRANSLATION ? 0 :
130 DSOerr(DSO_F_DL_LOAD, DSO_R_LOAD_FAILED);
131 ERR_add_error_data(4, "filename(", filename, "): ", strerror(errno));
134 if (!sk_push(dso->meth_data, (char *)ptr)) {
135 DSOerr(DSO_F_DL_LOAD, DSO_R_STACK_ERROR);
139 * Success, stick the converted filename we've loaded under into the DSO
140 * (it also serves as the indicator that we are currently loaded).
142 dso->loaded_filename = filename;
146 OPENSSL_free(filename);
152 static int dl_unload(DSO *dso)
156 DSOerr(DSO_F_DL_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
159 if (sk_num(dso->meth_data) < 1)
161 /* Is this statement legal? */
162 ptr = (shl_t) sk_pop(dso->meth_data);
164 DSOerr(DSO_F_DL_UNLOAD, DSO_R_NULL_HANDLE);
166 * Should push the value back onto the stack in case of a retry.
168 sk_push(dso->meth_data, (char *)ptr);
175 static void *dl_bind_var(DSO *dso, const char *symname)
180 if ((dso == NULL) || (symname == NULL)) {
181 DSOerr(DSO_F_DL_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
184 if (sk_num(dso->meth_data) < 1) {
185 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_STACK_ERROR);
188 ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
190 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_NULL_HANDLE);
193 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
194 DSOerr(DSO_F_DL_BIND_VAR, DSO_R_SYM_FAILURE);
195 ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
201 static DSO_FUNC_TYPE dl_bind_func(DSO *dso, const char *symname)
206 if ((dso == NULL) || (symname == NULL)) {
207 DSOerr(DSO_F_DL_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
210 if (sk_num(dso->meth_data) < 1) {
211 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_STACK_ERROR);
214 ptr = (shl_t) sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
216 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_NULL_HANDLE);
219 if (shl_findsym(&ptr, symname, TYPE_UNDEFINED, &sym) < 0) {
220 DSOerr(DSO_F_DL_BIND_FUNC, DSO_R_SYM_FAILURE);
221 ERR_add_error_data(4, "symname(", symname, "): ", strerror(errno));
224 return ((DSO_FUNC_TYPE)sym);
227 static char *dl_merger(DSO *dso, const char *filespec1, const char *filespec2)
231 if (!filespec1 && !filespec2) {
232 DSOerr(DSO_F_DL_MERGER, ERR_R_PASSED_NULL_PARAMETER);
236 * If the first file specification is a rooted path, it rules. same goes
237 * if the second file specification is missing.
239 if (!filespec2 || filespec1[0] == '/') {
240 merged = OPENSSL_malloc(strlen(filespec1) + 1);
241 if (merged == NULL) {
242 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
245 strcpy(merged, filespec1);
248 * If the first file specification is missing, the second one rules.
250 else if (!filespec1) {
251 merged = OPENSSL_malloc(strlen(filespec2) + 1);
252 if (merged == NULL) {
253 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
256 strcpy(merged, filespec2);
259 * This part isn't as trivial as it looks. It assumes that the
260 * second file specification really is a directory, and makes no
261 * checks whatsoever. Therefore, the result becomes the
262 * concatenation of filespec2 followed by a slash followed by
268 spec2len = (filespec2 ? strlen(filespec2) : 0);
269 len = spec2len + (filespec1 ? strlen(filespec1) : 0);
271 if (filespec2 && filespec2[spec2len - 1] == '/') {
275 merged = OPENSSL_malloc(len + 2);
276 if (merged == NULL) {
277 DSOerr(DSO_F_DL_MERGER, ERR_R_MALLOC_FAILURE);
280 strcpy(merged, filespec2);
281 merged[spec2len] = '/';
282 strcpy(&merged[spec2len + 1], filespec1);
288 * This function is identical to the one in dso_dlfcn.c, but as it is highly
289 * unlikely that both the "dl" *and* "dlfcn" variants are being compiled at
290 * the same time, there's no great duplicating the code. Figuring out an
291 * elegant way to share one copy of the code would be more difficult and
292 * would not leave the implementations independent.
295 static const char extension[] = ".sl";
297 static const char extension[] = ".so";
299 static char *dl_name_converter(DSO *dso, const char *filename)
302 int len, rsize, transform;
304 len = strlen(filename);
306 transform = (strstr(filename, "/") == NULL);
308 /* We will convert this to "%s.s?" or "lib%s.s?" */
309 rsize += strlen(extension); /* The length of ".s?" */
310 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
311 rsize += 3; /* The length of "lib" */
313 translated = OPENSSL_malloc(rsize);
314 if (translated == NULL) {
315 DSOerr(DSO_F_DL_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
319 if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
320 sprintf(translated, "lib%s%s", filename, extension);
322 sprintf(translated, "%s%s", filename, extension);
324 sprintf(translated, "%s", filename);
328 static int dl_pathbyaddr(void *addr, char *path, int sz)
330 struct shl_descriptor inf;
335 int (*f) (void *, char *, int);
343 for (i = -1; shl_get_r(i, &inf) == 0; i++) {
344 if (((size_t)addr >= inf.tstart && (size_t)addr < inf.tend) ||
345 ((size_t)addr >= inf.dstart && (size_t)addr < inf.dend)) {
346 len = (int)strlen(inf.filename);
351 memcpy(path, inf.filename, len);
360 static void *dl_globallookup(const char *name)
365 return shl_findsym(&h, name, TYPE_UNDEFINED, &ret) ? NULL : ret;