Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Helper functions for form handling. |
| 2 | Copyright (C) 2003, 2004 Red Hat, Inc. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 3 | This file is part of Red Hat elfutils. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 4 | Written by Ulrich Drepper <drepper@redhat.com>, 2003. |
| 5 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 6 | Red Hat elfutils is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by the |
| 8 | Free Software Foundation; version 2 of the License. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 9 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 10 | Red Hat elfutils is distributed in the hope that it will be useful, but |
| 11 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License along |
| 16 | with Red Hat elfutils; if not, write to the Free Software Foundation, |
Ulrich Drepper | 1e9ef50 | 2006-04-04 22:29:06 +0000 | [diff] [blame] | 17 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 18 | |
| 19 | In addition, as a special exception, Red Hat, Inc. gives You the |
| 20 | additional right to link the code of Red Hat elfutils with code licensed |
| 21 | under any Open Source Initiative certified open source license |
| 22 | (http://www.opensource.org/licenses/index.php) which requires the |
| 23 | distribution of source code with any binary distribution and to |
| 24 | distribute linked combinations of the two. Non-GPL Code permitted under |
| 25 | this exception must only link to the code of Red Hat elfutils through |
| 26 | those well defined interfaces identified in the file named EXCEPTION |
| 27 | found in the source code files (the "Approved Interfaces"). The files |
| 28 | of Non-GPL Code may instantiate templates or use macros or inline |
| 29 | functions from the Approved Interfaces without causing the resulting |
| 30 | work to be covered by the GNU General Public License. Only Red Hat, |
| 31 | Inc. may make changes or additions to the list of Approved Interfaces. |
| 32 | Red Hat's grant of this exception is conditioned upon your not adding |
| 33 | any new exceptions. If you wish to add a new Approved Interface or |
| 34 | exception, please contact Red Hat. You must obey the GNU General Public |
| 35 | License in all respects for all of the Red Hat elfutils code and other |
| 36 | code used in conjunction with Red Hat elfutils except the Non-GPL Code |
| 37 | covered by this exception. If you modify this file, you may extend this |
| 38 | exception to your version of the file, but you are not obligated to do |
| 39 | so. If you do not wish to provide this exception without modification, |
| 40 | you must delete this exception statement from your version and license |
| 41 | this file solely under the GPL without exception. |
| 42 | |
| 43 | Red Hat elfutils is an included package of the Open Invention Network. |
| 44 | An included package of the Open Invention Network is a package for which |
| 45 | Open Invention Network licensees cross-license their patents. No patent |
| 46 | license is granted, either expressly or impliedly, by designation as an |
| 47 | included package. Should you wish to participate in the Open Invention |
| 48 | Network licensing program, please visit www.openinventionnetwork.com |
| 49 | <http://www.openinventionnetwork.com>. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 50 | |
| 51 | #ifdef HAVE_CONFIG_H |
| 52 | # include <config.h> |
| 53 | #endif |
| 54 | |
| 55 | #include <dwarf.h> |
| 56 | #include <string.h> |
| 57 | |
| 58 | #include "libdwP.h" |
| 59 | |
| 60 | |
| 61 | size_t |
| 62 | internal_function_def |
| 63 | __libdw_form_val_len (Dwarf *dbg, struct Dwarf_CU *cu, unsigned int form, |
| 64 | const unsigned char *valp) |
| 65 | { |
| 66 | const unsigned char *saved; |
| 67 | Dwarf_Word u128; |
| 68 | size_t result; |
| 69 | |
| 70 | switch (form) |
| 71 | { |
| 72 | case DW_FORM_addr: |
| 73 | result = cu->address_size; |
| 74 | break; |
| 75 | |
| 76 | case DW_FORM_strp: |
| 77 | case DW_FORM_ref_addr: |
| 78 | result = cu->offset_size; |
| 79 | break; |
| 80 | |
| 81 | case DW_FORM_block1: |
| 82 | result = *valp + 1; |
| 83 | break; |
| 84 | |
| 85 | case DW_FORM_block2: |
| 86 | result = read_2ubyte_unaligned (dbg, valp) + 2; |
| 87 | break; |
| 88 | |
| 89 | case DW_FORM_block4: |
| 90 | result = read_4ubyte_unaligned (dbg, valp) + 4; |
| 91 | break; |
| 92 | |
| 93 | case DW_FORM_block: |
| 94 | saved = valp; |
| 95 | get_uleb128 (u128, valp); |
| 96 | result = u128 + (valp - saved); |
| 97 | break; |
| 98 | |
| 99 | case DW_FORM_ref1: |
| 100 | case DW_FORM_data1: |
| 101 | case DW_FORM_flag: |
| 102 | result = 1; |
| 103 | break; |
| 104 | |
| 105 | case DW_FORM_data2: |
| 106 | case DW_FORM_ref2: |
| 107 | result = 2; |
| 108 | break; |
| 109 | |
| 110 | case DW_FORM_data4: |
| 111 | case DW_FORM_ref4: |
| 112 | result = 4; |
| 113 | break; |
| 114 | |
| 115 | case DW_FORM_data8: |
| 116 | case DW_FORM_ref8: |
| 117 | result = 8; |
| 118 | break; |
| 119 | |
| 120 | case DW_FORM_string: |
| 121 | result = strlen ((char *) valp) + 1; |
| 122 | break; |
| 123 | |
| 124 | case DW_FORM_sdata: |
| 125 | case DW_FORM_udata: |
| 126 | case DW_FORM_ref_udata: |
| 127 | saved = valp; |
| 128 | get_uleb128 (u128, valp); |
| 129 | result = valp - saved; |
| 130 | break; |
| 131 | |
| 132 | case DW_FORM_indirect: |
| 133 | saved = valp; |
| 134 | get_uleb128 (u128, valp); |
| 135 | // XXX Is this really correct? |
| 136 | result = __libdw_form_val_len (dbg, cu, u128, valp); |
| 137 | if (result != (size_t) -1) |
| 138 | result += valp - saved; |
| 139 | break; |
| 140 | |
| 141 | default: |
| 142 | __libdw_seterrno (DWARF_E_INVALID_DWARF); |
| 143 | result = (size_t) -1l; |
| 144 | break; |
| 145 | } |
| 146 | |
| 147 | return result; |
| 148 | } |