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/* Return compile-unit relative offset of reference associated with form.
Copyright (C) 2000, 2002 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2000.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <dwarf.h>
#include <libdwarfP.h>
int
dwarf_formref (attr, return_offset, error)
Dwarf_Attribute attr;
Dwarf_Off *return_offset;
Dwarf_Error *error;
{
switch (attr->form)
{
case DW_FORM_ref1:
*return_offset = *attr->valp;
break;
case DW_FORM_ref2:
*return_offset = read_2ubyte_unaligned (attr->cu->dbg, attr->valp);
break;
case DW_FORM_ref4:
*return_offset = read_4ubyte_unaligned (attr->cu->dbg, attr->valp);
break;
case DW_FORM_ref8:
*return_offset = read_8ubyte_unaligned (attr->cu->dbg, attr->valp);
break;
case DW_FORM_ref_udata:
{
Dwarf_Off off;
Dwarf_Small *attrp = attr->valp;
get_uleb128 (off, attrp);
*return_offset = off;
}
break;
case DW_FORM_ref_addr:
__libdwarf_error (attr->cu->dbg, error, DW_E_INVALID_REFERENCE);
return DW_DLV_ERROR;
default:
__libdwarf_error (attr->cu->dbg, error, DW_E_NO_REFERENCE);
return DW_DLV_ERROR;
}
return DW_DLV_OK;
}
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