[thirdparty/openssl.git] / crypto / dso / dso_dlfcn.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).
 *
 */

/*
 * 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 "internal/cryptlib.h"
#include <openssl/dso.h>

#ifndef DSO_DLFCN
DSO_METHOD *DSO_METHOD_dlfcn(void)
{
    return NULL;
}
#else

# 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

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);
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,
    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.
 */
# 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

/*
 * 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_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_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;
    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_malloc(strlen(filespec1) + 1);
        if (merged == NULL) {
            DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
            return (NULL);
        }
        strcpy(merged, filespec1);
    }
    /*
     * If the first file specification is missing, the second one rules.
     */
    else if (!filespec1) {
        merged = OPENSSL_malloc(strlen(filespec2) + 1);
        if (merged == NULL) {
            DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
            return (NULL);
        }
        strcpy(merged, filespec2);
    } 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 */
Commit	Line	Data
0f113f3e MC	1	/*
	2	* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
	3	* 2000.
8f4fac7f GT	4	*/
	5	/* ====================================================================
	6	* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	*
	12	* 1. Redistributions of source code must retain the above copyright
0f113f3e	13	* notice, this list of conditions and the following disclaimer.
8f4fac7f GT	14	*
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in
	17	* the documentation and/or other materials provided with the
	18	* distribution.
	19	*
	20	* 3. All advertising materials mentioning features or use of this
	21	* software must display the following acknowledgment:
	22	* "This product includes software developed by the OpenSSL Project
	23	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	24	*
	25	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	26	* endorse or promote products derived from this software without
	27	* prior written permission. For written permission, please contact
	28	* licensing@OpenSSL.org.
	29	*
	30	* 5. Products derived from this software may not be called "OpenSSL"
	31	* nor may "OpenSSL" appear in their names without prior written
	32	* permission of the OpenSSL Project.
	33	*
	34	* 6. Redistributions of any form whatsoever must retain the following
	35	* acknowledgment:
	36	* "This product includes software developed by the OpenSSL Project
	37	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	38	*
	39	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	40	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	41	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	42	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	43	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	44	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	45	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	46	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	47	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	48	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	49	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	50	* OF THE POSSIBILITY OF SUCH DAMAGE.
	51	* ====================================================================
	52	*
	53	* This product includes cryptographic software written by Eric Young
	54	* (eay@cryptsoft.com). This product includes software written by Tim
	55	* Hudson (tjh@cryptsoft.com).
	56	*
	57	*/
	58
0f113f3e MC	59	/*
	60	* We need to do this early, because stdio.h includes the header files that
	61	* handle _GNU_SOURCE and other similar macros. Defining it later is simply
	62	* too late, because those headers are protected from re- inclusion.
	63	*/
c1844095	64	#ifndef _GNU_SOURCE
0f113f3e	65	# define _GNU_SOURCE /* make sure dladdr is declared */
3ecbd099 RL	66	#endif
3ecbd099 RL	67
8f4fac7f	68	#include <stdio.h>
b39fc560	69	#include "internal/cryptlib.h"
8f4fac7f GT	70	#include <openssl/dso.h>
	71
	72	#ifndef DSO_DLFCN
	73	DSO_METHOD *DSO_METHOD_dlfcn(void)
0f113f3e MC	74	{
	75	return NULL;
	76	}
8f4fac7f GT	77	#else
8f4fac7f GT	78
0f113f3e MC	79	# ifdef HAVE_DLFCN_H
	80	# ifdef __osf__
	81	# define __EXTENSIONS__
	82	# endif
	83	# include <dlfcn.h>
	84	# define HAVE_DLINFO 1
	85	# if defined(_AIX) \|\| defined(__CYGWIN__) \|\| \
73133962	86	defined(__SCO_VERSION__) \|\| defined(_SCO_ELF) \|\| \
afb41913	87	(defined(__osf__) && !defined(RTLD_NEXT)) \|\| \
7a4ec19a	88	(defined(__OpenBSD__) && !defined(RTLD_SELF)) \|\| \
0f113f3e MC	89	defined(__ANDROID__)
	90	# undef HAVE_DLINFO
	91	# endif
73133962	92	# endif
8f4fac7f	93
b9e63915	94	/* Part of the hack in "dlfcn_load" ... */
0f113f3e	95	# define DSO_MAX_TRANSLATED_SIZE 256
b9e63915	96
51c8dc37	97	static int dlfcn_load(DSO *dso);
8f4fac7f	98	static int dlfcn_unload(DSO *dso);
e9a68cfb GT	99	static void dlfcn_bind_var(DSO dso, const char *symname);
e9a68cfb GT	100	static DSO_FUNC_TYPE dlfcn_bind_func(DSO dso, const char symname);
51c8dc37	101	static char dlfcn_name_converter(DSO dso, const char *filename);
cbecb3ac	102	static char dlfcn_merger(DSO dso, const char *filespec1,
0f113f3e MC	103	const char *filespec2);
0f113f3e MC	104	static int dlfcn_pathbyaddr(void addr, char path, int sz);
c6cb42e4	105	static void dlfcn_globallookup(const char name);
8f4fac7f GT	106
8f4fac7f GT	107	static DSO_METHOD dso_meth_dlfcn = {
0f113f3e MC	108	"OpenSSL 'dlfcn' shared library method",
	109	dlfcn_load,
	110	dlfcn_unload,
	111	dlfcn_bind_var,
	112	dlfcn_bind_func,
0f113f3e MC	113	NULL, /* ctrl */
	114	dlfcn_name_converter,
	115	dlfcn_merger,
	116	NULL, /* init */
	117	NULL, /* finish */
	118	dlfcn_pathbyaddr,
	119	dlfcn_globallookup
	120	};
8f4fac7f GT	121
8f4fac7f GT	122	DSO_METHOD *DSO_METHOD_dlfcn(void)
0f113f3e MC	123	{
	124	return (&dso_meth_dlfcn);
	125	}
	126
	127	/*
	128	* Prior to using the dlopen() function, we should decide on the flag we
	129	* send. There's a few different ways of doing this and it's a messy
	130	* venn-diagram to match up which platforms support what. So as we don't have
	131	* autoconf yet, I'm implementing a hack that could be hacked further
	132	* relatively easily to deal with cases as we find them. Initially this is to
	133	* cope with OpenBSD.
	134	*/
	135	# if defined(__OpenBSD__) \|\| defined(__NetBSD__)
	136	# ifdef DL_LAZY
	137	# define DLOPEN_FLAG DL_LAZY
	138	# else
	139	# ifdef RTLD_NOW
	140	# define DLOPEN_FLAG RTLD_NOW
	141	# else
	142	# define DLOPEN_FLAG 0
	143	# endif
	144	# endif
	145	# else
	146	# define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
	147	# endif
1a797ac6	148
0f113f3e MC	149	/*
	150	* For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
	151	* (void*) returned from dlopen().
8f4fac7f GT	152	*/
8f4fac7f GT	153
51c8dc37	154	static int dlfcn_load(DSO *dso)
0f113f3e MC	155	{
	156	void *ptr = NULL;
	157	/* See applicable comments in dso_dl.c */
	158	char *filename = DSO_convert_filename(dso, NULL);
	159	int flags = DLOPEN_FLAG;
	160
	161	if (filename == NULL) {
	162	DSOerr(DSO_F_DLFCN_LOAD, DSO_R_NO_FILENAME);
	163	goto err;
	164	}
	165	# ifdef RTLD_GLOBAL
	166	if (dso->flags & DSO_FLAG_GLOBAL_SYMBOLS)
	167	flags \|= RTLD_GLOBAL;
	168	# endif
	169	ptr = dlopen(filename, flags);
	170	if (ptr == NULL) {
	171	DSOerr(DSO_F_DLFCN_LOAD, DSO_R_LOAD_FAILED);
	172	ERR_add_error_data(4, "filename(", filename, "): ", dlerror());
	173	goto err;
	174	}
	175	if (!sk_void_push(dso->meth_data, (char *)ptr)) {
	176	DSOerr(DSO_F_DLFCN_LOAD, DSO_R_STACK_ERROR);
	177	goto err;
	178	}
	179	/* Success */
	180	dso->loaded_filename = filename;
	181	return (1);
	182	err:
	183	/* Cleanup! */
b548a1f1	184	OPENSSL_free(filename);
0f113f3e MC	185	if (ptr != NULL)
	186	dlclose(ptr);
	187	return (0);
51c8dc37	188	}
8f4fac7f GT	189
8f4fac7f GT	190	static int dlfcn_unload(DSO *dso)
0f113f3e MC	191	{
	192	void *ptr;
	193	if (dso == NULL) {
	194	DSOerr(DSO_F_DLFCN_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
	195	return (0);
	196	}
	197	if (sk_void_num(dso->meth_data) < 1)
	198	return (1);
	199	ptr = sk_void_pop(dso->meth_data);
	200	if (ptr == NULL) {
	201	DSOerr(DSO_F_DLFCN_UNLOAD, DSO_R_NULL_HANDLE);
	202	/*
	203	* Should push the value back onto the stack in case of a retry.
	204	*/
	205	sk_void_push(dso->meth_data, ptr);
	206	return (0);
	207	}
	208	/* For now I'm not aware of any errors associated with dlclose() */
	209	dlclose(ptr);
	210	return (1);
	211	}
8f4fac7f	212
e9a68cfb	213	static void dlfcn_bind_var(DSO dso, const char *symname)
0f113f3e MC	214	{
	215	void ptr, sym;
	216
	217	if ((dso == NULL) \|\| (symname == NULL)) {
	218	DSOerr(DSO_F_DLFCN_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
	219	return (NULL);
	220	}
	221	if (sk_void_num(dso->meth_data) < 1) {
	222	DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_STACK_ERROR);
	223	return (NULL);
	224	}
	225	ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
	226	if (ptr == NULL) {
	227	DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_NULL_HANDLE);
	228	return (NULL);
	229	}
	230	sym = dlsym(ptr, symname);
	231	if (sym == NULL) {
	232	DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_SYM_FAILURE);
	233	ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
	234	return (NULL);
	235	}
	236	return (sym);
	237	}
e9a68cfb GT	238
e9a68cfb GT	239	static DSO_FUNC_TYPE dlfcn_bind_func(DSO dso, const char symname)
0f113f3e MC	240	{
	241	void *ptr;
	242	union {
	243	DSO_FUNC_TYPE sym;
	244	void *dlret;
	245	} u;
	246
	247	if ((dso == NULL) \|\| (symname == NULL)) {
	248	DSOerr(DSO_F_DLFCN_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
	249	return (NULL);
	250	}
	251	if (sk_void_num(dso->meth_data) < 1) {
	252	DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_STACK_ERROR);
	253	return (NULL);
	254	}
	255	ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
	256	if (ptr == NULL) {
	257	DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_NULL_HANDLE);
	258	return (NULL);
	259	}
	260	u.dlret = dlsym(ptr, symname);
	261	if (u.dlret == NULL) {
	262	DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_SYM_FAILURE);
	263	ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
	264	return (NULL);
	265	}
	266	return u.sym;
	267	}
8f4fac7f	268
cbecb3ac	269	static char dlfcn_merger(DSO dso, const char *filespec1,
0f113f3e MC	270	const char *filespec2)
	271	{
	272	char *merged;
	273
	274	if (!filespec1 && !filespec2) {
	275	DSOerr(DSO_F_DLFCN_MERGER, ERR_R_PASSED_NULL_PARAMETER);
	276	return (NULL);
	277	}
	278	/*
	279	* If the first file specification is a rooted path, it rules. same goes
	280	* if the second file specification is missing.
	281	*/
	282	if (!filespec2 \|\| (filespec1 != NULL && filespec1[0] == '/')) {
	283	merged = OPENSSL_malloc(strlen(filespec1) + 1);
90945fa3	284	if (merged == NULL) {
0f113f3e MC	285	DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
	286	return (NULL);
	287	}
	288	strcpy(merged, filespec1);
	289	}
	290	/*
	291	* If the first file specification is missing, the second one rules.
	292	*/
	293	else if (!filespec1) {
	294	merged = OPENSSL_malloc(strlen(filespec2) + 1);
90945fa3	295	if (merged == NULL) {
0f113f3e MC	296	DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
	297	return (NULL);
	298	}
	299	strcpy(merged, filespec2);
b7573c59	300	} else {
0f113f3e MC	301	/*
	302	* This part isn't as trivial as it looks. It assumes that the
	303	* second file specification really is a directory, and makes no
	304	* checks whatsoever. Therefore, the result becomes the
	305	* concatenation of filespec2 followed by a slash followed by
	306	* filespec1.
	307	*/
0f113f3e MC	308	int spec2len, len;
	309
	310	spec2len = strlen(filespec2);
b7573c59	311	len = spec2len + strlen(filespec1);
0f113f3e	312
b7573c59	313	if (spec2len && filespec2[spec2len - 1] == '/') {
0f113f3e MC	314	spec2len--;
	315	len--;
	316	}
	317	merged = OPENSSL_malloc(len + 2);
90945fa3	318	if (merged == NULL) {
0f113f3e MC	319	DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
	320	return (NULL);
	321	}
	322	strcpy(merged, filespec2);
	323	merged[spec2len] = '/';
	324	strcpy(&merged[spec2len + 1], filespec1);
	325	}
	326	return (merged);
	327	}
4a620922	328
0f113f3e MC	329	# ifdef OPENSSL_SYS_MACOSX
	330	# define DSO_ext ".dylib"
	331	# define DSO_extlen 6
	332	# else
	333	# define DSO_ext ".so"
	334	# define DSO_extlen 3
	335	# endif
4a620922	336
51c8dc37	337	static char dlfcn_name_converter(DSO dso, const char *filename)
0f113f3e MC	338	{
	339	char *translated;
	340	int len, rsize, transform;
	341
	342	len = strlen(filename);
	343	rsize = len + 1;
	344	transform = (strstr(filename, "/") == NULL);
	345	if (transform) {
	346	/* We will convert this to "%s.so" or "lib%s.so" etc */
	347	rsize += DSO_extlen; /* The length of ".so" */
	348	if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
	349	rsize += 3; /* The length of "lib" */
	350	}
	351	translated = OPENSSL_malloc(rsize);
	352	if (translated == NULL) {
	353	DSOerr(DSO_F_DLFCN_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
	354	return (NULL);
	355	}
	356	if (transform) {
	357	if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
	358	sprintf(translated, "lib%s" DSO_ext, filename);
	359	else
	360	sprintf(translated, "%s" DSO_ext, filename);
	361	} else
	362	sprintf(translated, "%s", filename);
	363	return (translated);
	364	}
	365
	366	# ifdef __sgi
23a22b4c	367	/*-
7ed87653 AP	368	This is a quote from IRIX manual for dladdr(3c):
	369
	370	<dlfcn.h> does not contain a prototype for dladdr or definition of
	371	Dl_info. The #include <dlfcn.h> in the SYNOPSIS line is traditional,
	372	but contains no dladdr prototype and no IRIX library contains an
	373	implementation. Write your own declaration based on the code below.
	374
	375	The following code is dependent on internal interfaces that are not
	376	part of the IRIX compatibility guarantee; however, there is no future
	377	intention to change this interface, so on a practical level, the code
	378	below is safe to use on IRIX.
c8e1edaa	379	*/
0f113f3e MC	380	# include <rld_interface.h>
	381	# ifndef _RLD_INTERFACE_DLFCN_H_DLADDR
	382	# define _RLD_INTERFACE_DLFCN_H_DLADDR
7ed87653	383	typedef struct Dl_info {
0f113f3e MC	384	const char *dli_fname;
	385	void *dli_fbase;
	386	const char *dli_sname;
	387	void *dli_saddr;
	388	int dli_version;
	389	int dli_reserved1;
	390	long dli_reserved[4];
7ed87653	391	} Dl_info;
0f113f3e	392	# else
7ed87653	393	typedef struct Dl_info Dl_info;
0f113f3e MC	394	# endif
0f113f3e MC	395	# define _RLD_DLADDR 14
7ed87653 AP	396
	397	static int dladdr(void address, Dl_info dl)
	398	{
0f113f3e MC	399	void *v;
	400	v = _rld_new_interface(_RLD_DLADDR, address, dl);
	401	return (int)v;
	402	}
	403	# endif /* __sgi */
	404
	405	static int dlfcn_pathbyaddr(void addr, char path, int sz)
	406	{
	407	# ifdef HAVE_DLINFO
	408	Dl_info dli;
	409	int len;
	410
	411	if (addr == NULL) {
	412	union {
	413	int (f) (void , char *, int);
	414	void *p;
	415	} t = {
	416	dlfcn_pathbyaddr
	417	};
	418	addr = t.p;
	419	}
	420
	421	if (dladdr(addr, &dli)) {
	422	len = (int)strlen(dli.dli_fname);
	423	if (sz <= 0)
	424	return len + 1;
	425	if (len >= sz)
	426	len = sz - 1;
	427	memcpy(path, dli.dli_fname, len);
	428	path[len++] = 0;
	429	return len;
	430	}
	431
	432	ERR_add_error_data(2, "dlfcn_pathbyaddr(): ", dlerror());
	433	# endif
	434	return -1;
7ed87653	435	}
68b64fb6	436
c6cb42e4	437	static void dlfcn_globallookup(const char name)
0f113f3e MC	438	{
	439	void ret = NULL, handle = dlopen(NULL, RTLD_LAZY);
	440
	441	if (handle) {
	442	ret = dlsym(handle, name);
	443	dlclose(handle);
	444	}
	445
	446	return ret;
	447	}
	448	#endif /* DSO_DLFCN */