1 /* Return string associated with given attribute. 2 Copyright (C) 2003, 2004 Red Hat, Inc. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 2003. 4 5 This program is Open Source software; you can redistribute it and/or 6 modify it under the terms of the Open Software License version 1.0 as 7 published by the Open Source Initiative. 8 9 You should have received a copy of the Open Software License along 10 with this program; if not, you may obtain a copy of the Open Software 11 License version 1.0 from http://www.opensource.org/licenses/osl.php or 12 by writing the Open Source Initiative c/o Lawrence Rosen, Esq., 13 3001 King Ranch Road, Ukiah, CA 95482. */ 14 15 #ifdef HAVE_CONFIG_H 16 # include <config.h> 17 #endif 18 19 #include <dwarf.h> 20 #include "libdwP.h" 21 22 23 const char * 24 dwarf_formstring (attrp) 25 Dwarf_Attribute *attrp; 26 { 27 /* Ignore earlier errors. */ 28 if (attrp == NULL) 29 return NULL; 30 31 /* We found it. Now determine where the string is stored. */ 32 if (attrp->form == DW_FORM_string) 33 /* A simple inlined string. */ 34 return (const char *) attrp->valp; 35 36 Dwarf *dbg = attrp->cu->dbg; 37 38 if (unlikely (attrp->form != DW_FORM_strp) 39 || dbg->sectiondata[IDX_debug_str] == NULL) 40 { 41 invalid_error: 42 __libdw_seterrno (DWARF_E_NO_STRING); 43 return NULL; 44 } 45 46 uint64_t off; 47 // XXX We need better boundary checks. 48 if (attrp->cu->offset_size == 8) 49 off = read_8ubyte_unaligned (dbg, attrp->valp); 50 else 51 off = read_4ubyte_unaligned (dbg, attrp->valp); 52 53 if (off >= dbg->sectiondata[IDX_debug_str]->d_size) 54 goto invalid_error; 55 56 return (const char *) dbg->sectiondata[IDX_debug_str]->d_buf + off; 57 } 58
