/* 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; static Dwarf_CU empty_cu = { .startp = &empty_exprloc, .endp = &empty_exprloc + 1 }; void internal_function __libdw_empty_loc_attr (Dwarf_Attribute *attr) { attr->code = DW_AT_location; attr->form = DW_FORM_exprloc; attr->valp = &empty_exprloc; attr->cu = &empty_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); return 0; } return 0; }