69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
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/* Return reference offset represented by attribute.
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Copyright (C) 2003 Red Hat, Inc.
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Written by Ulrich Drepper <drepper@redhat.com>, 2003.
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This program is Open Source software; you can redistribute it and/or
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modify it under the terms of the Open Software License version 1.0 as
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published by the Open Source Initiative.
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You should have received a copy of the Open Software License along
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with this program; if not, you may obtain a copy of the Open Software
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License version 1.0 from http://www.opensource.org/licenses/osl.php or
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by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
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3001 King Ranch Road, Ukiah, CA 95482. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <dwarf.h>
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#include "libdwP.h"
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int
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dwarf_formref (attr, return_offset)
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Dwarf_Attribute *attr;
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Dwarf_Off *return_offset;
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{
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if (attr == NULL)
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return -1;
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unsigned int u128;
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unsigned char *datap;
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switch (attr->form)
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{
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case DW_FORM_ref1:
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*return_offset = *attr->valp;
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break;
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case DW_FORM_ref2:
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*return_offset = read_2ubyte_unaligned (attr->cu->dbg, attr->valp);
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break;
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case DW_FORM_ref4:
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*return_offset = read_4ubyte_unaligned (attr->cu->dbg, attr->valp);
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break;
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case DW_FORM_ref8:
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*return_offset = read_8ubyte_unaligned (attr->cu->dbg, attr->valp);
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break;
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case DW_FORM_ref_udata:
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datap = attr->valp;
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get_uleb128 (u128, datap);
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*return_offset = u128;
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break;
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case DW_FORM_ref_addr:
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__libdw_seterrno (DWARF_E_INVALID_REFERENCE);
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return -1;
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default:
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__libdw_seterrno (DWARF_E_NO_REFERENCE);
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return -1;
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}
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return 0;
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}
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