125b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Return string associated with given attribute. 203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Copyright (C) 2003-2010, 2013 Red Hat, Inc. 303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes This file is part of elfutils. 425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Written by Ulrich Drepper <drepper@redhat.com>, 2003. 525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes This file is free software; you can redistribute it and/or modify 703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes it under the terms of either 825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes * the GNU Lesser General Public License as published by the Free 1003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Software Foundation; either version 3 of the License, or (at 1103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes your option) any later version 1203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes or 1403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes * the GNU General Public License as published by the Free 1603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Software Foundation; either version 2 of the License, or (at 1703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes your option) any later version 1803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes or both in parallel, as here. 2003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 2103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes elfutils is distributed in the hope that it will be useful, but 2225b3c049e70834cf33790a28643ab058b507b35cBen Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 2325b3c049e70834cf33790a28643ab058b507b35cBen Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 2425b3c049e70834cf33790a28643ab058b507b35cBen Cheng General Public License for more details. 2525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 2603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes You should have received copies of the GNU General Public License and 2703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes the GNU Lesser General Public License along with this program. If 2803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes not, see <http://www.gnu.org/licenses/>. */ 2925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#ifdef HAVE_CONFIG_H 3125b3c049e70834cf33790a28643ab058b507b35cBen Cheng# include <config.h> 3225b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 3325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3425b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <dwarf.h> 3525b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include "libdwP.h" 3625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3825b3c049e70834cf33790a28643ab058b507b35cBen Chengconst char * 3925b3c049e70834cf33790a28643ab058b507b35cBen Chengdwarf_formstring (attrp) 4025b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Attribute *attrp; 4125b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 4225b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Ignore earlier errors. */ 4325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (attrp == NULL) 4425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return NULL; 4525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4625b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* We found it. Now determine where the string is stored. */ 4725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (attrp->form == DW_FORM_string) 4825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* A simple inlined string. */ 4925b3c049e70834cf33790a28643ab058b507b35cBen Cheng return (const char *) attrp->valp; 5025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5125b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf *dbg = attrp->cu->dbg; 5203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Dwarf *dbg_ret = attrp->form == DW_FORM_GNU_strp_alt ? dbg->alt_dwarf : dbg; 5303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 5403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (unlikely (dbg_ret == NULL)) 5503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes { 5603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes __libdw_seterrno (DWARF_E_NO_ALT_DEBUGLINK); 5703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes return NULL; 5803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes } 5903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 6025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (unlikely (attrp->form != DW_FORM_strp 6203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes && attrp->form != DW_FORM_GNU_strp_alt) 6303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes || dbg_ret->sectiondata[IDX_debug_str] == NULL) 6425b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 6525b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libdw_seterrno (DWARF_E_NO_STRING); 6625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return NULL; 6725b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 6825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6925b3c049e70834cf33790a28643ab058b507b35cBen Cheng uint64_t off; 7003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes if (__libdw_read_offset (dbg, dbg_ret, cu_sec_idx (attrp->cu), attrp->valp, 7125b3c049e70834cf33790a28643ab058b507b35cBen Cheng attrp->cu->offset_size, &off, IDX_debug_str, 1)) 7225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return NULL; 7325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes return (const char *) dbg_ret->sectiondata[IDX_debug_str]->d_buf + off; 7525b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 7625b3c049e70834cf33790a28643ab058b507b35cBen ChengINTDEF(dwarf_formstring) 77