1441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* Return reference offset represented by attribute. 2cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Copyright (C) 2003, 2005, 2007, 2008 Red Hat, Inc. 3cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng This file is part of Red Hat elfutils. 4441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Written by Ulrich Drepper <drepper@redhat.com>, 2003. 5441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 6cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat elfutils is free software; you can redistribute it and/or modify 7cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng it under the terms of the GNU General Public License as published by the 8cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Free Software Foundation; version 2 of the License. 9441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 10cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat elfutils is distributed in the hope that it will be useful, but 11cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 12cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng General Public License for more details. 14cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 15cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng You should have received a copy of the GNU General Public License along 16cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng with Red Hat elfutils; if not, write to the Free Software Foundation, 17cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 18cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 19cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng In addition, as a special exception, Red Hat, Inc. gives You the 20cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng additional right to link the code of Red Hat elfutils with code licensed 21cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng under any Open Source Initiative certified open source license 22cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng (http://www.opensource.org/licenses/index.php) which requires the 23cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng distribution of source code with any binary distribution and to 24cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng distribute linked combinations of the two. Non-GPL Code permitted under 25cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng this exception must only link to the code of Red Hat elfutils through 26cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng those well defined interfaces identified in the file named EXCEPTION 27cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng found in the source code files (the "Approved Interfaces"). The files 28cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng of Non-GPL Code may instantiate templates or use macros or inline 29cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng functions from the Approved Interfaces without causing the resulting 30cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng work to be covered by the GNU General Public License. Only Red Hat, 31cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Inc. may make changes or additions to the list of Approved Interfaces. 32cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat's grant of this exception is conditioned upon your not adding 33cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng any new exceptions. If you wish to add a new Approved Interface or 34cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng exception, please contact Red Hat. You must obey the GNU General Public 35cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng License in all respects for all of the Red Hat elfutils code and other 36cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng code used in conjunction with Red Hat elfutils except the Non-GPL Code 37cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng covered by this exception. If you modify this file, you may extend this 38cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng exception to your version of the file, but you are not obligated to do 39cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng so. If you do not wish to provide this exception without modification, 40cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng you must delete this exception statement from your version and license 41cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng this file solely under the GPL without exception. 42cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 43cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat elfutils is an included package of the Open Invention Network. 44cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng An included package of the Open Invention Network is a package for which 45cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Open Invention Network licensees cross-license their patents. No patent 46cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng license is granted, either expressly or impliedly, by designation as an 47cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng included package. Should you wish to participate in the Open Invention 48cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Network licensing program, please visit www.openinventionnetwork.com 49cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng <http://www.openinventionnetwork.com>. */ 50441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 51441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#ifdef HAVE_CONFIG_H 52441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project# include <config.h> 53441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#endif 54441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 55441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <dwarf.h> 56441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include "libdwP.h" 57441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 58441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectint 59cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng__libdw_formref (attr, return_offset) 60441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Dwarf_Attribute *attr; 61441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Dwarf_Off *return_offset; 62441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 63cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng const unsigned char *datap; 64441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 65cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng if (attr->valp == NULL) 66cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng { 67cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng __libdw_seterrno (DWARF_E_INVALID_REFERENCE); 68cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng return -1; 69cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng } 70441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 71441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project switch (attr->form) 72441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 73441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project case DW_FORM_ref1: 74441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *return_offset = *attr->valp; 75441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project break; 76441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 77441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project case DW_FORM_ref2: 78441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *return_offset = read_2ubyte_unaligned (attr->cu->dbg, attr->valp); 79441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project break; 80441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 81441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project case DW_FORM_ref4: 82441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *return_offset = read_4ubyte_unaligned (attr->cu->dbg, attr->valp); 83441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project break; 84441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 85441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project case DW_FORM_ref8: 86441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *return_offset = read_8ubyte_unaligned (attr->cu->dbg, attr->valp); 87441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project break; 88441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 89441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project case DW_FORM_ref_udata: 90441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project datap = attr->valp; 91cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng get_uleb128 (*return_offset, datap); 92441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project break; 93441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 94441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project case DW_FORM_ref_addr: 95441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project __libdw_seterrno (DWARF_E_INVALID_REFERENCE); 96441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return -1; 97441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 98441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project default: 99441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project __libdw_seterrno (DWARF_E_NO_REFERENCE); 100441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return -1; 101441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 102441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 103441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return 0; 104441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 105cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 106cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng/* This is the old public entry point. 107cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng It is now deprecated in favor of dwarf_formref_die. */ 108cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Chengint 109cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Chengdwarf_formref (attr, return_offset) 110cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Dwarf_Attribute *attr; 111cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Dwarf_Off *return_offset; 112cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng{ 113cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng if (attr == NULL) 114cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng return -1; 115cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 116cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng return __libdw_formref (attr, return_offset); 117cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng} 118