X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdso%2Fdso_dlfcn.c;h=ed0b2c80df1ad382fa6a334b68e233c615734ff7;hp=e709c721cc348dbffae72382698ef7af3bc2df09;hb=3c630352e22f2f8295d70cceb8f034294aadc822;hpb=1a797ac67ca917b617496fe40b9b17aa50f75ee8 diff --git a/crypto/dso/dso_dlfcn.c b/crypto/dso/dso_dlfcn.c index e709c721cc..ed0b2c80df 100644 --- a/crypto/dso/dso_dlfcn.c +++ b/crypto/dso/dso_dlfcn.c @@ -1,4 +1,4 @@ -/* dso_dlfcn.c */ +/* dso_dlfcn.c -*- mode:C; c-file-style: "eay" -*- */ /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL * project 2000. */ @@ -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 #include "cryptlib.h" #include @@ -68,13 +78,19 @@ DSO_METHOD *DSO_METHOD_dlfcn(void) #else #ifdef HAVE_DLFCN_H -#include +# include +# 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" ... */ #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); @@ -82,8 +98,13 @@ static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname); 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); +#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", @@ -96,9 +117,13 @@ static DSO_METHOD dso_meth_dlfcn = { NULL, /* unbind_var */ NULL, /* unbind_func */ #endif - dlfcn_ctrl, + NULL, /* ctrl */ + dlfcn_name_converter, + dlfcn_merger, NULL, /* init */ - NULL /* finish */ + NULL, /* finish */ + dlfcn_pathbyaddr, + dlfcn_globallookup }; DSO_METHOD *DSO_METHOD_dlfcn(void) @@ -112,7 +137,7 @@ DSO_METHOD *DSO_METHOD_dlfcn(void) * 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__ +#if defined(__OpenBSD__) || defined(__NetBSD__) # ifdef DL_LAZY # define DLOPEN_FLAG DL_LAZY # else @@ -123,48 +148,57 @@ DSO_METHOD *DSO_METHOD_dlfcn(void) # endif # endif #else -# define DLOPEN_FLAG RTLD_NOW /* Hope this works everywhere 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, const char *filename) +static int dlfcn_load(DSO *dso) { - void *ptr; - char translated[DSO_MAX_TRANSLATED_SIZE]; - int len; + void *ptr = NULL; + /* See applicable comments in dso_dl.c */ + char *filename = DSO_convert_filename(dso, NULL); + int flags = DLOPEN_FLAG; - /* 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)) + if(filename == NULL) { - sprintf(translated, "lib%s.so", filename); - ptr = dlopen(translated, DLOPEN_FLAG); - } - else - { - ptr = dlopen(filename, DLOPEN_FLAG); + 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); - return(0); + 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); - dlclose(ptr); - return(0); + 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) { @@ -174,15 +208,15 @@ 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() */ @@ -199,12 +233,12 @@ 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); @@ -214,6 +248,7 @@ static void *dlfcn_bind_var(DSO *dso, const char *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); @@ -222,55 +257,220 @@ 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; + DSO_FUNC_TYPE sym, *tsym = &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) + 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); } - 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); + ERR_add_error_data(4, "symname(", symname, "): ", dlerror()); return(NULL); } return(sym); } -static long dlfcn_ctrl(DSO *dso, int cmd, long larg, void *parg) +static char *dlfcn_merger(DSO *dso, const char *filespec1, + const char *filespec2) { - if(dso == NULL) + char *merged; + + if(!filespec1 && !filespec2) { - DSOerr(DSO_F_DLFCN_CTRL,ERR_R_PASSED_NULL_PARAMETER); - return(-1); + DSOerr(DSO_F_DLFCN_MERGER, + ERR_R_PASSED_NULL_PARAMETER); + return(NULL); } - switch(cmd) + /* 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] == '/')) { - 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; + 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); } - DSOerr(DSO_F_DLFCN_CTRL,DSO_R_UNKNOWN_COMMAND); - return(-1); + 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): + + does not contain a prototype for dladdr or definition of + Dl_info. The #include 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 +#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 */