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/* Return DIE at given offset.
Copyright (C) 2002-2010, 2017 Red Hat, Inc.
This file is part of elfutils.
Written by Ulrich Drepper <drepper@redhat.com>, 2002.
This file is free software; you can redistribute it and/or modify
it under the terms of either
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at
your option) any later version
or
* the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at
your option) any later version
or both in parallel, as here.
elfutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received copies of the GNU General Public License and
the GNU Lesser General Public License along with this program. If
not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include "libdwP.h"
Dwarf_Die *
internal_function
__libdw_offdie (Dwarf *dbg, Dwarf_Off offset, Dwarf_Die *result,
bool debug_types)
{
if (dbg == NULL)
return NULL;
Elf_Data *const data = dbg->sectiondata[debug_types ? IDX_debug_types
: IDX_debug_info];
if (data == NULL || offset >= data->d_size)
{
__libdw_seterrno (DWARF_E_INVALID_DWARF);
return NULL;
}
/* Clear the entire DIE structure. This signals we have not yet
determined any of the information. */
memset (result, '\0', sizeof (Dwarf_Die));
result->addr = (char *) data->d_buf + offset;
/* Get the CU. */
result->cu = __libdw_findcu (dbg, offset, debug_types);
if (result->cu == NULL)
{
/* This should never happen. The input file is malformed. */
__libdw_seterrno (DWARF_E_INVALID_DWARF);
result = NULL;
}
return result;
}
Dwarf_Die *
dwarf_offdie (Dwarf *dbg, Dwarf_Off offset, Dwarf_Die *result)
{
return __libdw_offdie (dbg, offset, result, false);
}
INTDEF(dwarf_offdie)
Dwarf_Die *
dwarf_offdie_types (Dwarf *dbg, Dwarf_Off offset, Dwarf_Die *result)
{
return __libdw_offdie (dbg, offset, result, true);
}
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