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131 lines
3.2 KiB
131 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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