[thirdparty/openssl.git] / crypto / dso / dso_dlfcn.c

/* 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 "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);
# if 0
static int dlfcn_unbind(DSO *dso, char *symname, void *symptr);
static int dlfcn_init(DSO *dso);
static int dlfcn_finish(DSO *dso);
static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg);
# endif
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
    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
#  ifdef OPENSSL_SYS_SUNOS
#   define DLOPEN_FLAG 1
#  else
#   define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
#  endif
# 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! */
    if (filename != NULL)
        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) {
            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) {
            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) {
            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
e961c7a2	1	/* dso_dlfcn.c */
10621efd MC	2	/*
	3	* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project
	4	* 2000.
8f4fac7f GT	5	*/
	6	/* ====================================================================
	7	* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	*
	13	* 1. Redistributions of source code must retain the above copyright
10621efd	14	* notice, this list of conditions and the following disclaimer.
8f4fac7f GT	15	*
	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
	19	* distribution.
	20	*
	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/)"
	25	*
	26	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	27	* endorse or promote products derived from this software without
	28	* prior written permission. For written permission, please contact
	29	* licensing@OpenSSL.org.
	30	*
	31	* 5. Products derived from this software may not be called "OpenSSL"
	32	* nor may "OpenSSL" appear in their names without prior written
	33	* permission of the OpenSSL Project.
	34	*
	35	* 6. Redistributions of any form whatsoever must retain the following
	36	* acknowledgment:
	37	* "This product includes software developed by the OpenSSL Project
	38	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	39	*
	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
	43	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	44	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	45	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	46	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	47	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	49	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	50	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	51	* OF THE POSSIBILITY OF SUCH DAMAGE.
	52	* ====================================================================
	53	*
	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).
	57	*
	58	*/
	59
10621efd MC	60	/*
	61	* We need to do this early, because stdio.h includes the header files that
	62	* handle _GNU_SOURCE and other similar macros. Defining it later is simply
	63	* too late, because those headers are protected from re- inclusion.
	64	*/
7858d304	65	#ifndef _GNU_SOURCE
10621efd	66	# define _GNU_SOURCE /* make sure dladdr is declared */
3ecbd099 RL	67	#endif
3ecbd099 RL	68
8f4fac7f GT	69	#include <stdio.h>
	70	#include "cryptlib.h"
	71	#include <openssl/dso.h>
	72
	73	#ifndef DSO_DLFCN
	74	DSO_METHOD *DSO_METHOD_dlfcn(void)
10621efd MC	75	{
	76	return NULL;
	77	}
8f4fac7f GT	78	#else
8f4fac7f GT	79
10621efd MC	80	# ifdef HAVE_DLFCN_H
	81	# ifdef __osf__
	82	# define __EXTENSIONS__
	83	# endif
	84	# include <dlfcn.h>
	85	# define HAVE_DLINFO 1
	86	# if defined(_AIX) \|\| defined(__CYGWIN__) \|\| \
73133962	87	defined(__SCO_VERSION__) \|\| defined(_SCO_ELF) \|\| \
1bfd3d7f	88	(defined(__osf__) && !defined(RTLD_NEXT)) \|\| \
4276908f	89	(defined(__OpenBSD__) && !defined(RTLD_SELF)) \|\| \
10621efd MC	90	defined(__ANDROID__)
	91	# undef HAVE_DLINFO
	92	# endif
73133962	93	# endif
8f4fac7f	94
b9e63915	95	/* Part of the hack in "dlfcn_load" ... */
10621efd	96	# define DSO_MAX_TRANSLATED_SIZE 256
b9e63915	97
51c8dc37	98	static int dlfcn_load(DSO *dso);
8f4fac7f	99	static int dlfcn_unload(DSO *dso);
e9a68cfb GT	100	static void dlfcn_bind_var(DSO dso, const char *symname);
e9a68cfb GT	101	static DSO_FUNC_TYPE dlfcn_bind_func(DSO dso, const char symname);
10621efd	102	# if 0
8f4fac7f GT	103	static int dlfcn_unbind(DSO dso, char symname, void *symptr);
	104	static int dlfcn_init(DSO *dso);
	105	static int dlfcn_finish(DSO *dso);
b9e63915	106	static long dlfcn_ctrl(DSO dso, int cmd, long larg, void parg);
10621efd	107	# endif
51c8dc37	108	static char dlfcn_name_converter(DSO dso, const char *filename);
cbecb3ac	109	static char dlfcn_merger(DSO dso, const char *filespec1,
10621efd MC	110	const char *filespec2);
10621efd MC	111	static int dlfcn_pathbyaddr(void addr, char path, int sz);
c6cb42e4	112	static void dlfcn_globallookup(const char name);
8f4fac7f GT	113
8f4fac7f GT	114	static DSO_METHOD dso_meth_dlfcn = {
10621efd MC	115	"OpenSSL 'dlfcn' shared library method",
	116	dlfcn_load,
	117	dlfcn_unload,
	118	dlfcn_bind_var,
	119	dlfcn_bind_func,
8f4fac7f	120	/* For now, "unbind" doesn't exist */
10621efd MC	121	# if 0
	122	NULL, /* unbind_var */
	123	NULL, /* unbind_func */
	124	# endif
	125	NULL, /* ctrl */
	126	dlfcn_name_converter,
	127	dlfcn_merger,
	128	NULL, /* init */
	129	NULL, /* finish */
	130	dlfcn_pathbyaddr,
	131	dlfcn_globallookup
	132	};
8f4fac7f GT	133
8f4fac7f GT	134	DSO_METHOD *DSO_METHOD_dlfcn(void)
10621efd MC	135	{
	136	return (&dso_meth_dlfcn);
	137	}
	138
	139	/*
	140	* Prior to using the dlopen() function, we should decide on the flag we
	141	* send. There's a few different ways of doing this and it's a messy
	142	* venn-diagram to match up which platforms support what. So as we don't have
	143	* autoconf yet, I'm implementing a hack that could be hacked further
	144	* relatively easily to deal with cases as we find them. Initially this is to
	145	* cope with OpenBSD.
	146	*/
	147	# if defined(__OpenBSD__) \|\| defined(__NetBSD__)
	148	# ifdef DL_LAZY
	149	# define DLOPEN_FLAG DL_LAZY
	150	# else
	151	# ifdef RTLD_NOW
	152	# define DLOPEN_FLAG RTLD_NOW
	153	# else
	154	# define DLOPEN_FLAG 0
	155	# endif
	156	# endif
	157	# else
	158	# ifdef OPENSSL_SYS_SUNOS
	159	# define DLOPEN_FLAG 1
	160	# else
	161	# define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
	162	# endif
	163	# endif
1a797ac6	164
10621efd MC	165	/*
	166	* For this DSO_METHOD, our meth_data STACK will contain; (i) the handle
	167	* (void*) returned from dlopen().
8f4fac7f GT	168	*/
8f4fac7f GT	169
51c8dc37	170	static int dlfcn_load(DSO *dso)
10621efd MC	171	{
	172	void *ptr = NULL;
	173	/* See applicable comments in dso_dl.c */
	174	char *filename = DSO_convert_filename(dso, NULL);
	175	int flags = DLOPEN_FLAG;
	176
	177	if (filename == NULL) {
	178	DSOerr(DSO_F_DLFCN_LOAD, DSO_R_NO_FILENAME);
	179	goto err;
	180	}
	181	# ifdef RTLD_GLOBAL
	182	if (dso->flags & DSO_FLAG_GLOBAL_SYMBOLS)
	183	flags \|= RTLD_GLOBAL;
	184	# endif
	185	ptr = dlopen(filename, flags);
	186	if (ptr == NULL) {
	187	DSOerr(DSO_F_DLFCN_LOAD, DSO_R_LOAD_FAILED);
	188	ERR_add_error_data(4, "filename(", filename, "): ", dlerror());
	189	goto err;
	190	}
	191	if (!sk_void_push(dso->meth_data, (char *)ptr)) {
	192	DSOerr(DSO_F_DLFCN_LOAD, DSO_R_STACK_ERROR);
	193	goto err;
	194	}
	195	/* Success */
	196	dso->loaded_filename = filename;
	197	return (1);
	198	err:
	199	/* Cleanup! */
	200	if (filename != NULL)
	201	OPENSSL_free(filename);
	202	if (ptr != NULL)
	203	dlclose(ptr);
	204	return (0);
51c8dc37	205	}
8f4fac7f GT	206
8f4fac7f GT	207	static int dlfcn_unload(DSO *dso)
10621efd MC	208	{
	209	void *ptr;
	210	if (dso == NULL) {
	211	DSOerr(DSO_F_DLFCN_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
	212	return (0);
	213	}
	214	if (sk_void_num(dso->meth_data) < 1)
	215	return (1);
	216	ptr = sk_void_pop(dso->meth_data);
	217	if (ptr == NULL) {
	218	DSOerr(DSO_F_DLFCN_UNLOAD, DSO_R_NULL_HANDLE);
	219	/*
	220	* Should push the value back onto the stack in case of a retry.
	221	*/
	222	sk_void_push(dso->meth_data, ptr);
	223	return (0);
	224	}
	225	/* For now I'm not aware of any errors associated with dlclose() */
	226	dlclose(ptr);
	227	return (1);
	228	}
8f4fac7f	229
e9a68cfb	230	static void dlfcn_bind_var(DSO dso, const char *symname)
10621efd MC	231	{
	232	void ptr, sym;
	233
	234	if ((dso == NULL) \|\| (symname == NULL)) {
	235	DSOerr(DSO_F_DLFCN_BIND_VAR, ERR_R_PASSED_NULL_PARAMETER);
	236	return (NULL);
	237	}
	238	if (sk_void_num(dso->meth_data) < 1) {
	239	DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_STACK_ERROR);
	240	return (NULL);
	241	}
	242	ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
	243	if (ptr == NULL) {
	244	DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_NULL_HANDLE);
	245	return (NULL);
	246	}
	247	sym = dlsym(ptr, symname);
	248	if (sym == NULL) {
	249	DSOerr(DSO_F_DLFCN_BIND_VAR, DSO_R_SYM_FAILURE);
	250	ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
	251	return (NULL);
	252	}
	253	return (sym);
	254	}
e9a68cfb GT	255
e9a68cfb GT	256	static DSO_FUNC_TYPE dlfcn_bind_func(DSO dso, const char symname)
10621efd MC	257	{
	258	void *ptr;
	259	union {
	260	DSO_FUNC_TYPE sym;
	261	void *dlret;
	262	} u;
	263
	264	if ((dso == NULL) \|\| (symname == NULL)) {
	265	DSOerr(DSO_F_DLFCN_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
	266	return (NULL);
	267	}
	268	if (sk_void_num(dso->meth_data) < 1) {
	269	DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_STACK_ERROR);
	270	return (NULL);
	271	}
	272	ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
	273	if (ptr == NULL) {
	274	DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_NULL_HANDLE);
	275	return (NULL);
	276	}
	277	u.dlret = dlsym(ptr, symname);
	278	if (u.dlret == NULL) {
	279	DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_SYM_FAILURE);
	280	ERR_add_error_data(4, "symname(", symname, "): ", dlerror());
	281	return (NULL);
	282	}
	283	return u.sym;
	284	}
8f4fac7f	285
cbecb3ac	286	static char dlfcn_merger(DSO dso, const char *filespec1,
10621efd MC	287	const char *filespec2)
	288	{
	289	char *merged;
	290
	291	if (!filespec1 && !filespec2) {
	292	DSOerr(DSO_F_DLFCN_MERGER, ERR_R_PASSED_NULL_PARAMETER);
	293	return (NULL);
	294	}
	295	/*
	296	* If the first file specification is a rooted path, it rules. same goes
	297	* if the second file specification is missing.
	298	*/
	299	if (!filespec2 \|\| (filespec1 != NULL && filespec1[0] == '/')) {
	300	merged = OPENSSL_malloc(strlen(filespec1) + 1);
	301	if (!merged) {
	302	DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
	303	return (NULL);
	304	}
	305	strcpy(merged, filespec1);
	306	}
	307	/*
	308	* If the first file specification is missing, the second one rules.
	309	*/
	310	else if (!filespec1) {
	311	merged = OPENSSL_malloc(strlen(filespec2) + 1);
	312	if (!merged) {
	313	DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
	314	return (NULL);
	315	}
	316	strcpy(merged, filespec2);
28e4f659	317	} else {
10621efd MC	318	/*
	319	* This part isn't as trivial as it looks. It assumes that the
	320	* second file specification really is a directory, and makes no
	321	* checks whatsoever. Therefore, the result becomes the
	322	* concatenation of filespec2 followed by a slash followed by
	323	* filespec1.
	324	*/
10621efd MC	325	int spec2len, len;
	326
	327	spec2len = strlen(filespec2);
28e4f659	328	len = spec2len + strlen(filespec1);
10621efd	329
28e4f659	330	if (spec2len && filespec2[spec2len - 1] == '/') {
10621efd MC	331	spec2len--;
	332	len--;
	333	}
	334	merged = OPENSSL_malloc(len + 2);
	335	if (!merged) {
	336	DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
	337	return (NULL);
	338	}
	339	strcpy(merged, filespec2);
	340	merged[spec2len] = '/';
	341	strcpy(&merged[spec2len + 1], filespec1);
	342	}
	343	return (merged);
	344	}
7dfae897	345
10621efd MC	346	# ifdef OPENSSL_SYS_MACOSX
	347	# define DSO_ext ".dylib"
	348	# define DSO_extlen 6
	349	# else
	350	# define DSO_ext ".so"
	351	# define DSO_extlen 3
	352	# endif
7dfae897	353
51c8dc37	354	static char dlfcn_name_converter(DSO dso, const char *filename)
10621efd MC	355	{
	356	char *translated;
	357	int len, rsize, transform;
	358
	359	len = strlen(filename);
	360	rsize = len + 1;
	361	transform = (strstr(filename, "/") == NULL);
	362	if (transform) {
	363	/* We will convert this to "%s.so" or "lib%s.so" etc */
	364	rsize += DSO_extlen; /* The length of ".so" */
	365	if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
	366	rsize += 3; /* The length of "lib" */
	367	}
	368	translated = OPENSSL_malloc(rsize);
	369	if (translated == NULL) {
	370	DSOerr(DSO_F_DLFCN_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
	371	return (NULL);
	372	}
	373	if (transform) {
	374	if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
	375	sprintf(translated, "lib%s" DSO_ext, filename);
	376	else
	377	sprintf(translated, "%s" DSO_ext, filename);
	378	} else
	379	sprintf(translated, "%s", filename);
	380	return (translated);
	381	}
	382
	383	# ifdef __sgi
71254823	384	/*-
7ed87653 AP	385	This is a quote from IRIX manual for dladdr(3c):
	386
	387	<dlfcn.h> does not contain a prototype for dladdr or definition of
	388	Dl_info. The #include <dlfcn.h> in the SYNOPSIS line is traditional,
	389	but contains no dladdr prototype and no IRIX library contains an
	390	implementation. Write your own declaration based on the code below.
	391
	392	The following code is dependent on internal interfaces that are not
	393	part of the IRIX compatibility guarantee; however, there is no future
	394	intention to change this interface, so on a practical level, the code
	395	below is safe to use on IRIX.
c8e1edaa	396	*/
10621efd MC	397	# include <rld_interface.h>
	398	# ifndef _RLD_INTERFACE_DLFCN_H_DLADDR
	399	# define _RLD_INTERFACE_DLFCN_H_DLADDR
7ed87653	400	typedef struct Dl_info {
10621efd MC	401	const char *dli_fname;
	402	void *dli_fbase;
	403	const char *dli_sname;
	404	void *dli_saddr;
	405	int dli_version;
	406	int dli_reserved1;
	407	long dli_reserved[4];
7ed87653	408	} Dl_info;
10621efd	409	# else
7ed87653	410	typedef struct Dl_info Dl_info;
10621efd MC	411	# endif
10621efd MC	412	# define _RLD_DLADDR 14
7ed87653 AP	413
	414	static int dladdr(void address, Dl_info dl)
	415	{
10621efd MC	416	void *v;
	417	v = _rld_new_interface(_RLD_DLADDR, address, dl);
	418	return (int)v;
	419	}
	420	# endif /* __sgi */
	421
	422	static int dlfcn_pathbyaddr(void addr, char path, int sz)
	423	{
	424	# ifdef HAVE_DLINFO
	425	Dl_info dli;
	426	int len;
	427
	428	if (addr == NULL) {
	429	union {
	430	int (f) (void , char *, int);
	431	void *p;
	432	} t = {
	433	dlfcn_pathbyaddr
	434	};
	435	addr = t.p;
	436	}
	437
	438	if (dladdr(addr, &dli)) {
	439	len = (int)strlen(dli.dli_fname);
	440	if (sz <= 0)
	441	return len + 1;
	442	if (len >= sz)
	443	len = sz - 1;
	444	memcpy(path, dli.dli_fname, len);
	445	path[len++] = 0;
	446	return len;
	447	}
	448
	449	ERR_add_error_data(2, "dlfcn_pathbyaddr(): ", dlerror());
	450	# endif
	451	return -1;
7ed87653	452	}
68b64fb6	453
c6cb42e4	454	static void dlfcn_globallookup(const char name)
10621efd MC	455	{
	456	void ret = NULL, handle = dlopen(NULL, RTLD_LAZY);
	457
	458	if (handle) {
	459	ret = dlsym(handle, name);
	460	dlclose(handle);
	461	}
	462
	463	return ret;
	464	}
	465	#endif /* DSO_DLFCN */