diff options
Diffstat (limited to 'openssl/crypto/dso/dso_dlfcn.c')
| -rw-r--r-- | openssl/crypto/dso/dso_dlfcn.c | 157 |
1 files changed, 135 insertions, 22 deletions
diff --git a/openssl/crypto/dso/dso_dlfcn.c b/openssl/crypto/dso/dso_dlfcn.c index 1fd10104c..14bd322fb 100644 --- a/openssl/crypto/dso/dso_dlfcn.c +++ b/openssl/crypto/dso/dso_dlfcn.c @@ -56,6 +56,16 @@ * */ +/* 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 +#endif + #include <stdio.h> #include "cryptlib.h" #include <openssl/dso.h> @@ -68,7 +78,16 @@ DSO_METHOD *DSO_METHOD_dlfcn(void) #else #ifdef HAVE_DLFCN_H -#include <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(__OpenBSD__) && !defined(RTLD_SELF)) +# undef HAVE_DLINFO +# endif #endif /* Part of the hack in "dlfcn_load" ... */ @@ -87,6 +106,8 @@ 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", @@ -103,7 +124,9 @@ static DSO_METHOD dso_meth_dlfcn = { dlfcn_name_converter, dlfcn_merger, NULL, /* init */ - NULL /* finish */ + NULL, /* finish */ + dlfcn_pathbyaddr, + dlfcn_globallookup }; DSO_METHOD *DSO_METHOD_dlfcn(void) @@ -163,7 +186,7 @@ static int dlfcn_load(DSO *dso) ERR_add_error_data(4, "filename(", filename, "): ", dlerror()); goto err; } - if(!sk_push(dso->meth_data, (char *)ptr)) + if(!sk_void_push(dso->meth_data, (char *)ptr)) { DSOerr(DSO_F_DLFCN_LOAD,DSO_R_STACK_ERROR); goto err; @@ -188,15 +211,15 @@ static int dlfcn_unload(DSO *dso) DSOerr(DSO_F_DLFCN_UNLOAD,ERR_R_PASSED_NULL_PARAMETER); return(0); } - if(sk_num(dso->meth_data) < 1) + if(sk_void_num(dso->meth_data) < 1) return(1); - ptr = (void *)sk_pop(dso->meth_data); + 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_push(dso->meth_data, (char *)ptr); + sk_void_push(dso->meth_data, ptr); return(0); } /* For now I'm not aware of any errors associated with dlclose() */ @@ -213,12 +236,12 @@ static void *dlfcn_bind_var(DSO *dso, const char *symname) DSOerr(DSO_F_DLFCN_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER); return(NULL); } - if(sk_num(dso->meth_data) < 1) + if(sk_void_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); + 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); @@ -237,32 +260,35 @@ static void *dlfcn_bind_var(DSO *dso, const char *symname) static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname) { void *ptr; - DSO_FUNC_TYPE sym, *tsym = &sym; + 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_num(dso->meth_data) < 1) + if(sk_void_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); + 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); } - *(void **)(tsym) = dlsym(ptr, symname); - if(sym == 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(sym); + return u.sym; } static char *dlfcn_merger(DSO *dso, const char *filespec1, @@ -278,13 +304,12 @@ static char *dlfcn_merger(DSO *dso, const char *filespec1, } /* If the first file specification is a rooted path, it rules. same goes if the second file specification is missing. */ - if (!filespec2 || filespec1[0] == '/') + if (!filespec2 || (filespec1 != NULL && filespec1[0] == '/')) { merged = OPENSSL_malloc(strlen(filespec1) + 1); if(!merged) { - DSOerr(DSO_F_DLFCN_MERGER, - ERR_R_MALLOC_FAILURE); + DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE); return(NULL); } strcpy(merged, filespec1); @@ -310,7 +335,7 @@ static char *dlfcn_merger(DSO *dso, const char *filespec1, { int spec2len, len; - spec2len = (filespec2 ? strlen(filespec2) : 0); + spec2len = strlen(filespec2); len = spec2len + (filespec1 ? strlen(filespec1) : 0); if(filespec2 && filespec2[spec2len - 1] == '/') @@ -332,6 +357,15 @@ static char *dlfcn_merger(DSO *dso, const char *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; @@ -342,8 +376,8 @@ static char *dlfcn_name_converter(DSO *dso, const char *filename) transform = (strstr(filename, "/") == NULL); if(transform) { - /* We will convert this to "%s.so" or "lib%s.so" */ - rsize += 3; /* The length of ".so" */ + /* 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" */ } @@ -357,13 +391,92 @@ static char *dlfcn_name_converter(DSO *dso, const char *filename) if(transform) { if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0) - sprintf(translated, "lib%s.so", filename); + sprintf(translated, "lib%s" DSO_ext, filename); else - sprintf(translated, "%s.so", filename); + 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(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 */ |