| /* Helper functions for form handling. |
| Copyright (C) 2000, 2002 Red Hat, Inc. |
| This file is part of Red Hat elfutils. |
| Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| |
| Red Hat elfutils is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by the |
| Free Software Foundation; version 2 of the License. |
| |
| Red Hat elfutils is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License along |
| with Red Hat elfutils; if not, write to the Free Software Foundation, |
| Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| |
| Red Hat elfutils is an included package of the Open Invention Network. |
| An included package of the Open Invention Network is a package for which |
| Open Invention Network licensees cross-license their patents. No patent |
| license is granted, either expressly or impliedly, by designation as an |
| included package. Should you wish to participate in the Open Invention |
| Network licensing program, please visit www.openinventionnetwork.com |
| <http://www.openinventionnetwork.com>. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <dwarf.h> |
| #include <string.h> |
| |
| #include <libdwarfP.h> |
| |
| |
| int |
| internal_function |
| __libdwarf_form_val_len (Dwarf_Debug dbg, Dwarf_CU_Info cu, Dwarf_Word form, |
| Dwarf_Small *valp, size_t *len, Dwarf_Error *error) |
| { |
| Dwarf_Small *saved; |
| Dwarf_Word u128; |
| |
| switch (form) |
| { |
| case DW_FORM_addr: |
| case DW_FORM_strp: |
| case DW_FORM_ref_addr: |
| *len = cu->address_size; |
| break; |
| |
| case DW_FORM_block1: |
| *len = *valp + 1; |
| break; |
| |
| case DW_FORM_block2: |
| *len = read_2ubyte_unaligned (dbg, valp) + 2; |
| break; |
| |
| case DW_FORM_block4: |
| *len = read_4ubyte_unaligned (dbg, valp) + 4; |
| break; |
| |
| case DW_FORM_block: |
| saved = valp; |
| get_uleb128 (u128, valp); |
| *len = u128 + (valp - saved); |
| break; |
| |
| case DW_FORM_ref1: |
| case DW_FORM_data1: |
| case DW_FORM_flag: |
| *len = 1; |
| break; |
| |
| case DW_FORM_data2: |
| case DW_FORM_ref2: |
| *len = 2; |
| break; |
| |
| case DW_FORM_data4: |
| case DW_FORM_ref4: |
| *len = 4; |
| break; |
| |
| case DW_FORM_data8: |
| case DW_FORM_ref8: |
| *len = 8; |
| break; |
| |
| case DW_FORM_string: |
| *len = strlen ((char *) valp) + 1; |
| break; |
| |
| case DW_FORM_sdata: |
| case DW_FORM_udata: |
| case DW_FORM_ref_udata: |
| saved = valp; |
| get_uleb128 (u128, valp); |
| *len = valp - saved; |
| break; |
| |
| case DW_FORM_indirect: |
| saved = valp; |
| get_uleb128 (u128, valp); |
| if (__libdwarf_form_val_len (dbg, cu, u128, valp, len, error) |
| != DW_DLV_OK) |
| return DW_DLV_ERROR; |
| *len += valp - saved; |
| break; |
| |
| default: |
| __libdwarf_error (dbg, error, DW_E_INVALID_DWARF); |
| return DW_DLV_ERROR; |
| } |
| |
| return DW_DLV_OK; |
| } |