diff options
Diffstat (limited to 'crypto/dso/dso_dlfcn.c')
| -rw-r--r-- | crypto/dso/dso_dlfcn.c | 694 |
1 files changed, 339 insertions, 355 deletions
diff --git a/crypto/dso/dso_dlfcn.c b/crypto/dso/dso_dlfcn.c index fb6f90a78c..c0fcbb18bd 100644 --- a/crypto/dso/dso_dlfcn.c +++ b/crypto/dso/dso_dlfcn.c @@ -1,6 +1,7 @@ /* dso_dlfcn.c -*- mode:C; c-file-style: "eay" -*- */ -/* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL - * project 2000. +/* + * Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL project + * 2000. */ /* ==================================================================== * Copyright (c) 2000 The OpenSSL Project. All rights reserved. @@ -10,7 +11,7 @@ * are met: * * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. + * 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 @@ -56,12 +57,13 @@ * */ -/* 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. */ +/* + * 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 */ +# define _GNU_SOURCE /* make sure dladdr is declared */ #endif #include <stdio.h> @@ -70,337 +72,316 @@ #ifndef DSO_DLFCN DSO_METHOD *DSO_METHOD_dlfcn(void) - { - return NULL; - } +{ + return NULL; +} #else -#ifdef HAVE_DLFCN_H -# ifdef __osf__ -# define __EXTENSIONS__ -# endif -# include <dlfcn.h> -# define HAVE_DLINFO 1 -# if defined(_AIX) || defined(__CYGWIN__) || \ +# 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 + defined(__ANDROID__) +# undef HAVE_DLINFO +# endif # endif -#endif /* Part of the hack in "dlfcn_load" ... */ -#define DSO_MAX_TRANSLATED_SIZE 256 +# 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 +# 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 +# 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); + 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, + "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 - }; +# 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 +{ + 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(). +/* + * 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); +{ + 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); - } +{ + 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); - } +{ + 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; - } +{ + 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 + (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); - } - -#ifdef OPENSSL_SYS_MACOSX -#define DSO_ext ".dylib" -#define DSO_extlen 6 -#else -#define DSO_ext ".so" -#define DSO_extlen 3 -#endif + 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); +} +# 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 +{ + 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): @@ -414,69 +395,72 @@ This is a quote from IRIX manual for dladdr(3c): 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 +# 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]; + 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 +# else typedef struct Dl_info Dl_info; -#endif -#define _RLD_DLADDR 14 +# 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; + 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; } -#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 */ +{ + void *ret = NULL, *handle = dlopen(NULL, RTLD_LAZY); + + if (handle) { + ret = dlsym(handle, name); + dlclose(handle); + } + + return ret; +} +#endif /* DSO_DLFCN */ |