Line data    Source code

       1             : /* Return string associated with given attribute.
       2             :    Copyright (C) 2003-2010, 2013 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Ulrich Drepper <drepper@redhat.com>, 2003.
       5             : 
       6             :    This file is free software; you can redistribute it and/or modify
       7             :    it under the terms of either
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    elfutils is distributed in the hope that it will be useful, but
      22             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>.  */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include <config.h>
      32             : #endif
      33             : 
      34             : #include <dwarf.h>
      35             : #include "libdwP.h"
      36             : 
      37             : 
      38             : const char *
      39      622875 : dwarf_formstring (Dwarf_Attribute *attrp)
      40             : {
      41             :   /* Ignore earlier errors.  */
      42      622875 :   if (attrp == NULL)
      43             :     return NULL;
      44             : 
      45             :   /* We found it.  Now determine where the string is stored.  */
      46      621837 :   if (attrp->form == DW_FORM_string)
      47             :     /* A simple inlined string.  */
      48       33295 :     return (const char *) attrp->valp;
      49             : 
      50      588542 :   Dwarf *dbg = attrp->cu->dbg;
      51      588542 :   Dwarf *dbg_ret = attrp->form == DW_FORM_GNU_strp_alt ? dbg->alt_dwarf : dbg;
      52             : 
      53      588542 :   if (unlikely (dbg_ret == NULL))
      54             :     {
      55           0 :       __libdw_seterrno (DWARF_E_NO_ALT_DEBUGLINK);
      56           0 :       return NULL;
      57             :     }
      58             : 
      59             : 
      60      588542 :   if (unlikely (attrp->form != DW_FORM_strp
      61             :                    && attrp->form != DW_FORM_GNU_strp_alt)
      62      588542 :       || dbg_ret->sectiondata[IDX_debug_str] == NULL)
      63             :     {
      64           0 :       __libdw_seterrno (DWARF_E_NO_STRING);
      65           0 :       return NULL;
      66             :     }
      67             : 
      68             :   uint64_t off;
      69     1177084 :   if (__libdw_read_offset (dbg, dbg_ret, cu_sec_idx (attrp->cu), attrp->valp,
      70      588542 :                            attrp->cu->offset_size, &off, IDX_debug_str, 1))
      71             :     return NULL;
      72             : 
      73      588542 :   return (const char *) dbg_ret->sectiondata[IDX_debug_str]->d_buf + off;
      74             : }
      75             : INTDEF(dwarf_formstring)