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132 lines
3.2 KiB
132 lines
3.2 KiB
/* Iterate through the CU units for a given Dwarf.
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Copyright (C) 2016, 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 <string.h>
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#include "libdwP.h"
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int
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dwarf_get_units (Dwarf *dwarf, Dwarf_CU *cu, Dwarf_CU **next_cu,
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Dwarf_Half *version, uint8_t *unit_type,
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Dwarf_Die *cudie, Dwarf_Die *subdie)
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{
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/* Handle existing error. */
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if (dwarf == NULL)
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return -1;
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Dwarf_Off off;
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bool v4type;
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if (cu == NULL)
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{
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off = 0;
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v4type = false;
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}
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else
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{
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off = cu->end;
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v4type = cu->sec_idx != IDX_debug_info;
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/* Make sure we got a real (not fake) CU. */
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if (cu->sec_idx != IDX_debug_info && cu->sec_idx != IDX_debug_types)
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{
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__libdw_seterrno (DWARF_E_INVALID_OFFSET);
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return -1;
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}
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/* Do we have to switch to the other section, or are we at the end? */
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if (! v4type)
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{
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if (off >= cu->dbg->sectiondata[IDX_debug_info]->d_size)
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{
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if (cu->dbg->sectiondata[IDX_debug_types] == NULL)
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return 1;
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off = 0;
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v4type = true;
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}
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}
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else
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if (off >= cu->dbg->sectiondata[IDX_debug_types]->d_size)
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return 1;
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}
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*next_cu = __libdw_findcu (dwarf, off, v4type);
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if (*next_cu == NULL)
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return -1;
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Dwarf_CU *next = (*next_cu);
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if (version != NULL)
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*version = next->version;
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if (unit_type != NULL)
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*unit_type = next->unit_type;
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if (cudie != NULL)
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{
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if (next->version >= 2 && next->version <= 5
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&& next->unit_type >= DW_UT_compile
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&& next->unit_type <= DW_UT_split_type)
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*cudie = CUDIE (next);
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else
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memset (cudie, '\0', sizeof (Dwarf_Die));
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}
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if (subdie != NULL)
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{
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if (next->version >= 2 && next->version <= 5)
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{
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/* For types, return the actual type DIE. For skeletons,
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find the associated split compile unit and return its
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DIE. */
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if (next->unit_type == DW_UT_type
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|| next->unit_type == DW_UT_split_type)
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*subdie = SUBDIE(next);
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else if (next->unit_type == DW_UT_skeleton)
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{
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Dwarf_CU *split_cu = __libdw_find_split_unit (next);
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if (split_cu != NULL)
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*subdie = CUDIE(split_cu);
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else
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memset (subdie, '\0', sizeof (Dwarf_Die));
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}
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else
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memset (subdie, '\0', sizeof (Dwarf_Die));
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}
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else
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memset (subdie, '\0', sizeof (Dwarf_Die));
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}
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return 0;
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}
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