mirror of
https://github.com/openharmony/third_party_elfutils.git
synced 2026-07-19 19:43:34 -04:00
Mark Wielaard
3951f2ec0a
When dwarf_getlocation_implicit_pointer and dwarf_getlocation_attr refer to a DIE that doesn't contain a DW_AT_location then don't generate an error, but return an empty location expression to signal the actual value pointed to is not available. This isn't invalid DWARF. Also make sure that __libdw_intern_expression handles empty location expressions. Signed-off-by: Mark Wielaard <mjw@redhat.com>
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
/* Return associated attribute for DW_OP_GNU_implicit_pointer.
|
|
Copyright (C) 2010 Red Hat, Inc.
|
|
This file is part of elfutils.
|
|
|
|
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 "libdwP.h"
|
|
#include <dwarf.h>
|
|
|
|
|
|
static unsigned char empty_exprloc = 0;
|
|
|
|
void
|
|
internal_function
|
|
__libdw_empty_loc_attr (Dwarf_Attribute *attr, struct Dwarf_CU *cu )
|
|
{
|
|
attr->code = DW_AT_location;
|
|
attr->form = DW_FORM_exprloc;
|
|
attr->valp = &empty_exprloc;
|
|
attr->cu = cu;
|
|
}
|
|
|
|
int
|
|
dwarf_getlocation_implicit_pointer (attr, op, result)
|
|
Dwarf_Attribute *attr;
|
|
const Dwarf_Op *op;
|
|
Dwarf_Attribute *result;
|
|
{
|
|
if (attr == NULL)
|
|
return -1;
|
|
|
|
if (unlikely (op->atom != DW_OP_GNU_implicit_pointer))
|
|
{
|
|
__libdw_seterrno (DWARF_E_INVALID_ACCESS);
|
|
return -1;
|
|
}
|
|
|
|
Dwarf_Die die;
|
|
if (__libdw_offdie (attr->cu->dbg, op->number, &die,
|
|
attr->cu->type_offset != 0) == NULL)
|
|
return -1;
|
|
|
|
if (INTUSE(dwarf_attr) (&die, DW_AT_location, result) == NULL
|
|
&& INTUSE(dwarf_attr) (&die, DW_AT_const_value, result) == NULL)
|
|
{
|
|
__libdw_empty_loc_attr (result, attr->cu);
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|