1 /*

     2  * Copyright 2012, 2013 SAP AG. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 /*

    26  * Header file to contain porting-relevant code which does not have a

    27  * home anywhere else.

    28  * This is intially based on hotspot/src/os/aix/vm/{loadlib,porting}_aix.{hpp,cpp}

    29  */

    30 

    31 /*

    32  * Aix' own version of dladdr().

    33  * This function tries to mimick dladdr(3) on Linux

    34  * (see http://linux.die.net/man/3/dladdr)

    35  * dladdr(3) is not POSIX but a GNU extension, and is not available on AIX.

    36  *

    37  * Differences between AIX dladdr and Linux dladdr:

    38  *

    39  * 1) Dl_info.dli_fbase: can never work, is disabled.

    40  *   A loaded image on AIX is divided in multiple segments, at least two

    41  *   (text and data) but potentially also far more. This is because the loader may

    42  *   load each member into an own segment, as for instance happens with the libC.a

    43  * 2) Dl_info.dli_sname: This only works for code symbols (functions); for data, a

    44  *   zero-length string is returned ("").

    45  * 3) Dl_info.dli_saddr: For code, this will return the entry point of the function,

    46  *   not the function descriptor.

    47  */

    48 

    49 typedef struct {

    50   const char *dli_fname; /* file path of loaded library */

    51   void *dli_fbase;       /* doesn't make sence on AIX */

    52   const char *dli_sname; /* symbol name; "" if not known */

    53   void *dli_saddr;       /* address of *entry* of function; not function descriptor; */

    54 } Dl_info;

    55 

    56 #ifdef __cplusplus

    57 extern "C"

    58 #endif

    59 int dladdr(void *addr, Dl_info *info);