/*
- * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
# define _GNU_SOURCE /* make sure dladdr is declared */
#endif
-#include "dso_locl.h"
+#include "dso_local.h"
+#include "e_os.h"
+
+DEFINE_STACK_OF(void)
#ifdef DSO_DLFCN
# endif
# include <dlfcn.h>
# define HAVE_DLINFO 1
-# if defined(_AIX) || defined(__CYGWIN__) || \
- defined(__SCO_VERSION__) || defined(_SCO_ELF) || \
+# if defined(__SCO_VERSION__) || defined(_SCO_ELF) || \
(defined(__osf__) && !defined(RTLD_NEXT)) || \
(defined(__OpenBSD__) && !defined(RTLD_SELF)) || \
defined(__ANDROID__)
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 = {
dlfcn_merger,
NULL, /* init */
NULL, /* finish */
+ dlfcn_pathbyaddr,
dlfcn_globallookup
};
/* See applicable comments in dso_dl.c */
char *filename = DSO_convert_filename(dso, NULL);
int flags = DLOPEN_FLAG;
+ int saveerrno = get_last_sys_error();
if (filename == NULL) {
DSOerr(DSO_F_DLFCN_LOAD, DSO_R_NO_FILENAME);
# ifdef RTLD_GLOBAL
if (dso->flags & DSO_FLAG_GLOBAL_SYMBOLS)
flags |= RTLD_GLOBAL;
+# endif
+# ifdef _AIX
+ if (filename[strlen(filename) - 1] == ')')
+ flags |= RTLD_MEMBER;
# endif
ptr = dlopen(filename, flags);
if (ptr == NULL) {
ERR_add_error_data(4, "filename(", filename, "): ", dlerror());
goto err;
}
+ /*
+ * Some dlopen() implementations (e.g. solaris) do no preserve errno, even
+ * on a successful call.
+ */
+ set_sys_error(saveerrno);
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);
+ return 1;
err:
/* Cleanup! */
OPENSSL_free(filename);
if (ptr != NULL)
dlclose(ptr);
- return (0);
+ 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);
+ return 0;
}
if (sk_void_num(dso->meth_data) < 1)
- return (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);
+ return 0;
}
/* For now I'm not aware of any errors associated with dlclose() */
dlclose(ptr);
- return (1);
+ return 1;
}
static DSO_FUNC_TYPE dlfcn_bind_func(DSO *dso, const char *symname)
if ((dso == NULL) || (symname == NULL)) {
DSOerr(DSO_F_DLFCN_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
- return (NULL);
+ return NULL;
}
if (sk_void_num(dso->meth_data) < 1) {
DSOerr(DSO_F_DLFCN_BIND_FUNC, DSO_R_STACK_ERROR);
- return (NULL);
+ 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);
+ 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 NULL;
}
return u.sym;
}
if (!filespec1 && !filespec2) {
DSOerr(DSO_F_DLFCN_MERGER, ERR_R_PASSED_NULL_PARAMETER);
- return (NULL);
+ return NULL;
}
/*
* If the first file specification is a rooted path, it rules. same goes
merged = OPENSSL_strdup(filespec1);
if (merged == NULL) {
DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
- return (NULL);
+ return NULL;
}
}
/*
merged = OPENSSL_strdup(filespec2);
if (merged == NULL) {
DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
- return (NULL);
+ return NULL;
}
} else {
/*
merged = OPENSSL_malloc(len + 2);
if (merged == NULL) {
DSOerr(DSO_F_DLFCN_MERGER, ERR_R_MALLOC_FAILURE);
- return (NULL);
+ return NULL;
}
strcpy(merged, filespec2);
merged[spec2len] = '/';
strcpy(&merged[spec2len + 1], filespec1);
}
- return (merged);
+ return merged;
}
static char *dlfcn_name_converter(DSO *dso, const char *filename)
translated = OPENSSL_malloc(rsize);
if (translated == NULL) {
DSOerr(DSO_F_DLFCN_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
- return (NULL);
+ return NULL;
}
if (transform) {
if ((DSO_flags(dso) & DSO_FLAG_NAME_TRANSLATION_EXT_ONLY) == 0)
sprintf(translated, "%s" DSO_EXTENSION, filename);
} else
sprintf(translated, "%s", filename);
- return (translated);
+ return translated;
}
# ifdef __sgi
}
# endif /* __sgi */
+# ifdef _AIX
+/*-
+ * See IBM's AIX Version 7.2, Technical Reference:
+ * Base Operating System and Extensions, Volume 1 and 2
+ * https://www.ibm.com/support/knowledgecenter/ssw_aix_72/com.ibm.aix.base/technicalreferences.htm
+ */
+# include <sys/ldr.h>
+# include <errno.h>
+/* ~ 64 * (sizeof(struct ld_info) + _XOPEN_PATH_MAX + _XOPEN_NAME_MAX) */
+# define DLFCN_LDINFO_SIZE 86976
+typedef struct Dl_info {
+ const char *dli_fname;
+} Dl_info;
+/*
+ * This dladdr()-implementation will also find the ptrgl (Pointer Glue) virtual
+ * address of a function, which is just located in the DATA segment instead of
+ * the TEXT segment.
+ */
+static int dladdr(void *ptr, Dl_info *dl)
+{
+ uintptr_t addr = (uintptr_t)ptr;
+ unsigned int found = 0;
+ struct ld_info *ldinfos, *next_ldi, *this_ldi;
+
+ if ((ldinfos = OPENSSL_malloc(DLFCN_LDINFO_SIZE)) == NULL) {
+ errno = ENOMEM;
+ dl->dli_fname = NULL;
+ return 0;
+ }
+
+ if ((loadquery(L_GETINFO, (void *)ldinfos, DLFCN_LDINFO_SIZE)) < 0) {
+ /*-
+ * Error handling is done through errno and dlerror() reading errno:
+ * ENOMEM (ldinfos buffer is too small),
+ * EINVAL (invalid flags),
+ * EFAULT (invalid ldinfos ptr)
+ */
+ OPENSSL_free((void *)ldinfos);
+ dl->dli_fname = NULL;
+ return 0;
+ }
+ next_ldi = ldinfos;
+
+ do {
+ this_ldi = next_ldi;
+ if (((addr >= (uintptr_t)this_ldi->ldinfo_textorg)
+ && (addr < ((uintptr_t)this_ldi->ldinfo_textorg +
+ this_ldi->ldinfo_textsize)))
+ || ((addr >= (uintptr_t)this_ldi->ldinfo_dataorg)
+ && (addr < ((uintptr_t)this_ldi->ldinfo_dataorg +
+ this_ldi->ldinfo_datasize)))) {
+ char *buffer, *member;
+ size_t buffer_sz, member_len;
+
+ buffer_sz = strlen(this_ldi->ldinfo_filename) + 1;
+ member = this_ldi->ldinfo_filename + buffer_sz;
+ if ((member_len = strlen(member)) > 0)
+ buffer_sz += 1 + member_len + 1;
+ found = 1;
+ if ((buffer = OPENSSL_malloc(buffer_sz)) != NULL) {
+ OPENSSL_strlcpy(buffer, this_ldi->ldinfo_filename, buffer_sz);
+ if (member_len > 0) {
+ /*
+ * Need to respect a possible member name and not just
+ * returning the path name in this case. See docs:
+ * sys/ldr.h, loadquery() and dlopen()/RTLD_MEMBER.
+ */
+ OPENSSL_strlcat(buffer, "(", buffer_sz);
+ OPENSSL_strlcat(buffer, member, buffer_sz);
+ OPENSSL_strlcat(buffer, ")", buffer_sz);
+ }
+ dl->dli_fname = buffer;
+ } else {
+ errno = ENOMEM;
+ }
+ } else {
+ next_ldi = (struct ld_info *)((uintptr_t)this_ldi +
+ this_ldi->ldinfo_next);
+ }
+ } while (this_ldi->ldinfo_next && !found);
+ OPENSSL_free((void *)ldinfos);
+ return (found && dl->dli_fname != NULL);
+}
+# endif /* _AIX */
+
+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) {
+# ifdef _AIX
+ OPENSSL_free((void *)dli.dli_fname);
+# endif
+ return len + 1;
+ }
+ if (len >= sz)
+ len = sz - 1;
+ memcpy(path, dli.dli_fname, len);
+ path[len++] = 0;
+# ifdef _AIX
+ OPENSSL_free((void *)dli.dli_fname);
+# endif
+ 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);
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