-/* dso_dlfcn.c */
+/* dso_dlfcn.c -*- mode:C; c-file-style: "eay" -*- */
/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
* project 2000.
*/
*
*/
+/* 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. */
+#ifdef __linux
+# ifndef _GNU_SOURCE
+# define _GNU_SOURCE /* make sure dladdr is declared */
+# endif
+# define HAVE_DLINFO 1
+#endif
+
#include <stdio.h>
#include "cryptlib.h"
#include <openssl/dso.h>
#else
#ifdef HAVE_DLFCN_H
+
#include <dlfcn.h>
#endif
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",
#endif
NULL, /* ctrl */
dlfcn_name_converter,
+ dlfcn_merger,
NULL, /* init */
- NULL /* finish */
+ NULL, /* finish */
+ dlfcn_pathbyaddr,
+ dlfcn_globallookup
};
DSO_METHOD *DSO_METHOD_dlfcn(void)
* 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__)
+# define HAVE_DLINFO 1
# ifdef DL_LAZY
# define DLOPEN_FLAG DL_LAZY
# else
# endif
# endif
#else
-# define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere else */
+# ifdef OPENSSL_SYS_SUNOS
+# define HAVE_DLINFO 1
+# 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;
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;
}
- ptr = dlopen(filename, DLOPEN_FLAG);
+
+#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);
static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
{
void *ptr;
- DSO_FUNC_TYPE sym;
+ DSO_FUNC_TYPE sym, *tsym = &sym;
if((dso == NULL) || (symname == NULL))
{
DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_NULL_HANDLE);
return(NULL);
}
- sym = (DSO_FUNC_TYPE)dlsym(ptr, symname);
+ *(void **)(tsym) = dlsym(ptr, symname);
if(sym == NULL)
{
DSOerr(DSO_F_DLFCN_BIND_FUNC,DSO_R_SYM_FAILURE);
return(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 + (filespec1 ? strlen(filespec1) : 0);
+
+ if(filespec2 && 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);
+ }
+
static char *dlfcn_name_converter(DSO *dso, const char *filename)
{
char *translated;
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.
+*/
+#define HAVE_DLINFO 1
+#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(4, "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 */
projects / openssl.git / blobdiff