-/* dso_dlfcn.c */
-/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
- * project 2000.
+/*
+ * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
+ * 2000.
*/
/* ====================================================================
* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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
*
*/
+/*
+ * We need to do this early, because stdio.h includes the header files that
+ * handle _GNU_SOURCE and other similar macros. Defining it later is simply
+ * too late, because those headers are protected from re- inclusion.
+ */
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE /* make sure dladdr is declared */
+#endif
+
#include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/dso.h>
#ifndef DSO_DLFCN
DSO_METHOD *DSO_METHOD_dlfcn(void)
- {
- return NULL;
- }
+{
+ return NULL;
+}
#else
-#ifdef HAVE_DLFCN_H
-#include <dlfcn.h>
-#endif
+# ifdef HAVE_DLFCN_H
+# ifdef __osf__
+# define __EXTENSIONS__
+# endif
+# include <dlfcn.h>
+# define HAVE_DLINFO 1
+# if defined(_AIX) || defined(__CYGWIN__) || \
+ defined(__SCO_VERSION__) || defined(_SCO_ELF) || \
+ (defined(__osf__) && !defined(RTLD_NEXT)) || \
+ (defined(__OpenBSD__) && !defined(RTLD_SELF)) || \
+ defined(__ANDROID__)
+# undef HAVE_DLINFO
+# endif
+# endif
/* Part of the hack in "dlfcn_load" ... */
-#define DSO_MAX_TRANSLATED_SIZE 256
+# define DSO_MAX_TRANSLATED_SIZE 256
-static int dlfcn_load(DSO *dso, const char *filename);
+static int dlfcn_load(DSO *dso);
static int dlfcn_unload(DSO *dso);
static void *dlfcn_bind_var(DSO *dso, const char *symname);
static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname);
-#if 0
-static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
-static int dlfcn_init(DSO *dso);
-static int dlfcn_finish(DSO *dso);
-#endif
-static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
+static char *dlfcn_name_converter(DSO *dso, const char *filename);
+static char *dlfcn_merger(DSO *dso, const char *filespec1,
+ const char *filespec2);
+static int dlfcn_pathbyaddr(void *addr, char *path, int sz);
+static void *dlfcn_globallookup(const char *name);
static DSO_METHOD dso_meth_dlfcn = {
- "OpenSSL 'dlfcn' shared library method",
- dlfcn_load,
- dlfcn_unload,
- dlfcn_bind_var,
- dlfcn_bind_func,
-/* For now, "unbind" doesn't exist */
-#if 0
- NULL, /* unbind_var */
- NULL, /* unbind_func */
-#endif
- dlfcn_ctrl,
- NULL, /* init */
- NULL /* finish */
- };
+ "OpenSSL 'dlfcn' shared library method",
+ dlfcn_load,
+ dlfcn_unload,
+ dlfcn_bind_var,
+ dlfcn_bind_func,
+ NULL, /* ctrl */
+ dlfcn_name_converter,
+ dlfcn_merger,
+ NULL, /* init */
+ NULL, /* finish */
+ dlfcn_pathbyaddr,
+ dlfcn_globallookup
+};
DSO_METHOD *DSO_METHOD_dlfcn(void)
- {
- return(&dso_meth_dlfcn);
- }
-
-/* Prior to using the dlopen() function, we should decide on the flag
- * we send. There's a few different ways of doing this and it's a
- * messy venn-diagram to match up which platforms support what. So
- * as we don't have autoconf yet, I'm implementing a hack that could
- * be hacked further relatively easily to deal with cases as we find
- * them. Initially this is to cope with OpenBSD. */
-#ifdef __OpenBSD__
-# ifdef DL_LAZY
-# define DLOPEN_FLAG DL_LAZY
-# else
-# ifdef RTLD_NOW
-# define DLOPEN_FLAG RTLD_NOW
-# else
-# define DLOPEN_FLAG 0
-# endif
-# endif
-#else
-# define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
-#endif
+{
+ return (&dso_meth_dlfcn);
+}
-/* For this DSO_METHOD, our meth_data STACK will contain;
- * (i) the handle (void*) returned from dlopen().
+/*
+ * Prior to using the dlopen() function, we should decide on the flag we
+ * send. There's a few different ways of doing this and it's a messy
+ * venn-diagram to match up which platforms support what. So as we don't have
+ * autoconf yet, I'm implementing a hack that could be hacked further
+ * relatively easily to deal with cases as we find them. Initially this is to
+ * cope with OpenBSD.
*/
+# if defined(__OpenBSD__) || defined(__NetBSD__)
+# ifdef DL_LAZY
+# define DLOPEN_FLAG DL_LAZY
+# else
+# ifdef RTLD_NOW
+# define DLOPEN_FLAG RTLD_NOW
+# else
+# define DLOPEN_FLAG 0
+# endif
+# endif
+# else
+# define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
+# endif
-static int dlfcn_load(DSO *dso, const char *filename)
- {
- void *ptr;
- char translated[DSO_MAX_TRANSLATED_SIZE];
- int len;
-
- /* NB: This is a hideous hack, but I'm not yet sure what
- * to replace it with. This attempts to convert any filename,
- * that looks like it has no path information, into a
- * translated form, e. "blah" -> "libblah.so" */
- len = strlen(filename);
- if((dso->flags & DSO_FLAG_NAME_TRANSLATION) &&
- (len + 6 < DSO_MAX_TRANSLATED_SIZE) &&
- (strstr(filename, "/") == NULL))
- {
- sprintf(translated, "lib%s.so", filename);
- ptr = dlopen(translated, DLOPEN_FLAG);
- }
- else
- {
- ptr = dlopen(filename, DLOPEN_FLAG);
- }
- if(ptr == NULL)
- {
- DSOerr(DSO_F_DLFCN_LOAD,DSO_R_LOAD_FAILED);
- return(0);
- }
- if(!sk_push(dso->meth_data, (char *)ptr))
- {
- DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR);
- dlclose(ptr);
- return(0);
- }
- return(1);
- }
+/*
+ * For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
+ * (void*) returned from dlopen().
+ */
+
+static int dlfcn_load(DSO *dso)
+{
+ void *ptr = NULL;
+ /* See applicable comments in dso_dl.c */
+ char *filename = DSO_convert_filename(dso, NULL);
+ int flags = DLOPEN_FLAG;
+
+ if (filename == NULL) {
+ DSOerr(DSO_F_DLFCN_LOAD, DSO_R_NO_FILENAME);
+ goto err;
+ }
+# ifdef RTLD_GLOBAL
+ if (dso->flags & DSO_FLAG_GLOBAL_SYMBOLS)
+ flags |= RTLD_GLOBAL;
+# endif
+ ptr = dlopen(filename, flags);
+ if (ptr == NULL) {
+ DSOerr(DSO_F_DLFCN_LOAD, DSO_R_LOAD_FAILED);
+ ERR_add_error_data(4, "filename(", filename, "): ", dlerror());
+ goto err;
+ }
+ if (!sk_void_push(dso->meth_data, (char *)ptr)) {
+ DSOerr(DSO_F_DLFCN_LOAD, DSO_R_STACK_ERROR);
+ goto err;
+ }
+ /* Success */
+ dso->loaded_filename = filename;
+ return (1);
+ err:
+ /* Cleanup! */
+ OPENSSL_free(filename);
+ if (ptr != NULL)
+ dlclose(ptr);
+ return (0);
+}
static int dlfcn_unload(DSO *dso)
- {
- void *ptr;
- if(dso == NULL)
- {
- DSOerr(DSO_F_DLFCN_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
- return(0);
- }
- if(sk_num(dso->meth_data) < 1)
- return(1);
- ptr = (void *)sk_pop(dso->meth_data);
- if(ptr == NULL)
- {
- DSOerr(DSO_F_DLFCN_UNLOAD,DSO_R_NULL_HANDLE);
- /* Should push the value back onto the stack in
- * case of a retry. */
- sk_push(dso->meth_data, (char *)ptr);
- return(0);
- }
- /* For now I'm not aware of any errors associated with dlclose() */
- dlclose(ptr);
- return(1);
- }
+{
+ void *ptr;
+ if (dso == NULL) {
+ DSOerr(DSO_F_DLFCN_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
+ return (0);
+ }
+ if (sk_void_num(dso->meth_data) < 1)
+ return (1);
+ ptr = sk_void_pop(dso->meth_data);
+ if (ptr == NULL) {
+ DSOerr(DSO_F_DLFCN_UNLOAD, DSO_R_NULL_HANDLE);
+ /*
+ * Should push the value back onto the stack in case of a retry.
+ */
+ sk_void_push(dso->meth_data, ptr);
+ return (0);
+ }
+ /* For now I'm not aware of any errors associated with dlclose() */
+ dlclose(ptr);
+ return (1);
+}
static void *dlfcn_bind_var(DSO *dso, const char *symname)
- {
- void *ptr, *sym;
-
- if((dso == NULL) || (symname == NULL))
- {
- DSOerr(DSO_F_DLFCN_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
- return(NULL);
- }
- if(sk_num(dso->meth_data) < 1)
- {
- DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_STACK_ERROR);
- return(NULL);
- }
- ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
- if(ptr == NULL)
- {
- DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_NULL_HANDLE);
- return(NULL);
- }
- sym = dlsym(ptr, symname);
- if(sym == NULL)
- {
- DSOerr(DSO_F_DLFCN_BIND_VAR,DSO_R_SYM_FAILURE);
- return(NULL);
- }
- return(sym);
- }
+{
+ void *ptr, *sym;
+
+ if ((dso == NULL) || (symname == NULL)) {
+ DSOerr(DSO_F_DLFCN_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
+ return (NULL);
+ }
+ if (sk_void_num(dso->meth_data) < 1) {
+ DSOerr(DSO_F_DLFCN_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_DLFCN_BIND_VAR, DSO_R_NULL_HANDLE);
+ return (NULL);
+ }
+ sym = dlsym(ptr, symname);
+ if (sym == NULL) {
+ DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_SYM_FAILURE);
+ ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
+ return (NULL);
+ }
+ return (sym);
+}
static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
- {
- void *ptr;
- DSO_FUNC_TYPE sym;
-
- if((dso == NULL) || (symname == NULL))
- {
- DSOerr(DSO_F_DLFCN_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
- return(NULL);
- }
- if(sk_num(dso->meth_data) < 1)
- {
- DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_STACK_ERROR);
- return(NULL);
- }
- ptr = (void *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
- if(ptr == NULL)
- {
- DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_NULL_HANDLE);
- return(NULL);
- }
- sym = (DSO_FUNC_TYPE)dlsym(ptr, symname);
- if(sym == NULL)
- {
- DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE);
- return(NULL);
- }
- return(sym);
- }
-
-static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg)
- {
- if(dso == NULL)
- {
- DSOerr(DSO_F_DLFCN_CTRL,ERR_R_PASSED_NULL_PARAMETER);
- return(-1);
- }
- switch(cmd)
- {
- case DSO_CTRL_GET_FLAGS:
- return dso->flags;
- case DSO_CTRL_SET_FLAGS:
- dso->flags = (int)larg;
- return(0);
- case DSO_CTRL_OR_FLAGS:
- dso->flags |= (int)larg;
- return(0);
- default:
- break;
- }
- DSOerr(DSO_F_DLFCN_CTRL,DSO_R_UNKNOWN_COMMAND);
- return(-1);
- }
-
-#endif /* DSO_DLFCN */
+{
+ void *ptr;
+ union {
+ DSO_FUNC_TYPE sym;
+ void *dlret;
+ } u;
+
+ if ((dso == NULL) || (symname == NULL)) {
+ DSOerr(DSO_F_DLFCN_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
+ return (NULL);
+ }
+ if (sk_void_num(dso->meth_data) < 1) {
+ DSOerr(DSO_F_DLFCN_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_DLFCN_BIND_FUNC, DSO_R_NULL_HANDLE);
+ return (NULL);
+ }
+ u.dlret = dlsym(ptr, symname);
+ if (u.dlret == NULL) {
+ DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_SYM_FAILURE);
+ ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
+ return (NULL);
+ }
+ return u.sym;
+}
+
+static char *dlfcn_merger(DSO *dso, const char *filespec1,
+ const char *filespec2)
+{
+ char *merged;
+
+ if (!filespec1 && !filespec2) {
+ DSOerr(DSO_F_DLFCN_MERGER, ERR_R_PASSED_NULL_PARAMETER);
+ return (NULL);
+ }
+ /*
+ * If the first file specification is a rooted path, it rules. same goes
+ * if the second file specification is missing.
+ */
+ if (!filespec2 || (filespec1 != NULL && filespec1[0] == '/')) {
+ merged = OPENSSL_strdup(filespec1);
+ if (merged == NULL) {
+ DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+ }
+ /*
+ * If the first file specification is missing, the second one rules.
+ */
+ else if (!filespec1) {
+ merged = OPENSSL_strdup(filespec2);
+ if (merged == NULL) {
+ DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+ } else {
+ /*
+ * This part isn't as trivial as it looks. It assumes that the
+ * second file specification really is a directory, and makes no
+ * checks whatsoever. Therefore, the result becomes the
+ * concatenation of filespec2 followed by a slash followed by
+ * filespec1.
+ */
+ int spec2len, len;
+
+ spec2len = strlen(filespec2);
+ len = spec2len + strlen(filespec1);
+
+ if (spec2len && filespec2[spec2len - 1] == '/') {
+ spec2len--;
+ len--;
+ }
+ merged = OPENSSL_malloc(len + 2);
+ if (merged == NULL) {
+ DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+ strcpy(merged, filespec2);
+ merged[spec2len] = '/';
+ strcpy(&merged[spec2len + 1], filespec1);
+ }
+ return (merged);
+}
+
+# ifdef OPENSSL_SYS_MACOSX
+# define DSO_ext ".dylib"
+# define DSO_extlen 6
+# else
+# define DSO_ext ".so"
+# define DSO_extlen 3
+# endif
+
+static char *dlfcn_name_converter(DSO *dso, const char *filename)
+{
+ char *translated;
+ int len, rsize, transform;
+
+ len = strlen(filename);
+ rsize = len + 1;
+ transform = (strstr(filename, "/") == NULL);
+ if (transform) {
+ /* We will convert this to "%s.so" or "lib%s.so" etc */
+ rsize += DSO_extlen; /* The length of ".so" */
+ if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+ rsize += 3; /* The length of "lib" */
+ }
+ translated = OPENSSL_malloc(rsize);
+ if (translated == NULL) {
+ DSOerr(DSO_F_DLFCN_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
+ return (NULL);
+ }
+ if (transform) {
+ if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
+ sprintf(translated, "lib%s" DSO_ext, filename);
+ else
+ sprintf(translated, "%s" DSO_ext, filename);
+ } else
+ sprintf(translated, "%s", filename);
+ return (translated);
+}
+
+# ifdef __sgi
+/*-
+This is a quote from IRIX manual for dladdr(3c):
+
+ <dlfcn.h> does not contain a prototype for dladdr or definition of
+ Dl_info. The #include <dlfcn.h> in the SYNOPSIS line is traditional,
+ but contains no dladdr prototype and no IRIX library contains an
+ implementation. Write your own declaration based on the code below.
+
+ The following code is dependent on internal interfaces that are not
+ part of the IRIX compatibility guarantee; however, there is no future
+ intention to change this interface, so on a practical level, the code
+ below is safe to use on IRIX.
+*/
+# include <rld_interface.h>
+# ifndef _RLD_INTERFACE_DLFCN_H_DLADDR
+# define _RLD_INTERFACE_DLFCN_H_DLADDR
+typedef struct Dl_info {
+ const char *dli_fname;
+ void *dli_fbase;
+ const char *dli_sname;
+ void *dli_saddr;
+ int dli_version;
+ int dli_reserved1;
+ long dli_reserved[4];
+} Dl_info;
+# else
+typedef struct Dl_info Dl_info;
+# endif
+# define _RLD_DLADDR 14
+
+static int dladdr(void *address, Dl_info *dl)
+{
+ void *v;
+ v = _rld_new_interface(_RLD_DLADDR, address, dl);
+ return (int)v;
+}
+# endif /* __sgi */
+
+static int dlfcn_pathbyaddr(void *addr, char *path, int sz)
+{
+# ifdef HAVE_DLINFO
+ Dl_info dli;
+ int len;
+
+ if (addr == NULL) {
+ union {
+ int (*f) (void *, char *, int);
+ void *p;
+ } t = {
+ dlfcn_pathbyaddr
+ };
+ addr = t.p;
+ }
+
+ if (dladdr(addr, &dli)) {
+ len = (int)strlen(dli.dli_fname);
+ if (sz <= 0)
+ return len + 1;
+ if (len >= sz)
+ len = sz - 1;
+ memcpy(path, dli.dli_fname, len);
+ path[len++] = 0;
+ return len;
+ }
+
+ ERR_add_error_data(2, "dlfcn_pathbyaddr(): ", dlerror());
+# endif
+ return -1;
+}
+
+static void *dlfcn_globallookup(const char *name)
+{
+ void *ret = NULL, *handle = dlopen(NULL, RTLD_LAZY);
+
+ if (handle) {
+ ret = dlsym(handle, name);
+ dlclose(handle);
+ }
+
+ return ret;
+}
+#endif /* DSO_DLFCN */
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