mirror of
https://github.com/openharmony/third_party_elfutils.git
synced 2026-07-19 19:43:34 -04:00
Mark Wielaard
86fbef9bca
DW_OP_implicit_pointer, DW_OP_entry_value, DW_OP_const_type, DW_OP_regval_type, DW_OP_deref_type, DW_OP_xderef_type, DW_OP_convert and OP_reinterpret are implemented like their pre-DWARF5 GNU variants. DW_OP_xderef_type is implemented as a (non-CU relative) variant of DW_OP_deref_type. DW_OP_addrx and DW_OP_constx are recognized but not interpreted yet. Signed-off-by: Mark Wielaard <mark@klomp.org>
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/* Return associated attribute for DW_OP_GNU_implicit_pointer.
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Copyright (C) 2010, 2017 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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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 "libdwP.h"
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#include <dwarf.h>
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static unsigned char empty_exprloc = 0;
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static Dwarf_CU empty_cu = { .startp = &empty_exprloc,
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.endp = &empty_exprloc + 1 };
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void
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internal_function
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__libdw_empty_loc_attr (Dwarf_Attribute *attr)
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{
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attr->code = DW_AT_location;
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attr->form = DW_FORM_exprloc;
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attr->valp = &empty_exprloc;
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attr->cu = &empty_cu;
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}
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int
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dwarf_getlocation_implicit_pointer (Dwarf_Attribute *attr, const Dwarf_Op *op,
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Dwarf_Attribute *result)
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{
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if (attr == NULL)
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return -1;
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if (unlikely (op->atom != DW_OP_implicit_pointer
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&& op->atom != DW_OP_GNU_implicit_pointer))
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{
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__libdw_seterrno (DWARF_E_INVALID_ACCESS);
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return -1;
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}
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Dwarf_Die die;
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if (__libdw_offdie (attr->cu->dbg, op->number, &die,
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ISV4TU(attr->cu)) == NULL)
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return -1;
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if (INTUSE(dwarf_attr) (&die, DW_AT_location, result) == NULL
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&& INTUSE(dwarf_attr) (&die, DW_AT_const_value, result) == NULL)
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{
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__libdw_empty_loc_attr (result);
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return 0;
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}
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return 0;
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}
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