File indexing completed on 2024-05-12 05:43:28

0001 /*
0002     Copyright (C) 2015 Volker Krause <vkrause@kde.org>
0003 
0004     This program is free software; you can redistribute it and/or modify it
0005     under the terms of the GNU Library General Public License as published by
0006     the Free Software Foundation; either version 2 of the License, or (at your
0007     option) any later version.
0008 
0009     This program is distributed in the hope that it will be useful, but WITHOUT
0010     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0011     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
0012     License for more details.
0013 
0014     You should have received a copy of the GNU General Public License
0015     along with this program.  If not, see <https://www.gnu.org/licenses/>.
0016 */
0017 
0018 #include "elfgnudebuglinksection.h"
0019 
0020 #include <QByteArray>
0021 
0022 #include <cassert>
0023 
0024 /*
0025  * Format, according to GDB manual:
0026  * - A filename, with any leading directory components removed, followed by a zero byte,
0027  * - zero to three bytes of padding, as needed to reach the next four-byte boundary within the section, and
0028  * - a four-byte CRC checksum, stored in the same endianness used for the executable file itself.
0029  * The checksum is computed on the debugging information file's full contents by the function given below, passing zero as the crc argument.
0030  */
0031 ElfGnuDebugLinkSection::ElfGnuDebugLinkSection(ElfFile* file, ElfSectionHeader* shdr): ElfSection(file, shdr)
0032 {
0033     assert(shdr->size() > 6);
0034 }
0035 
0036 ElfGnuDebugLinkSection::~ElfGnuDebugLinkSection()
0037 {
0038 }
0039 
0040 QByteArray ElfGnuDebugLinkSection::fileName() const
0041 {
0042     auto len = strnlen(reinterpret_cast<const char*>(rawData()), header()->size() - 4);
0043     return QByteArray::fromRawData(reinterpret_cast<const char*>(rawData()), len);
0044 }
0045 
0046 uint32_t ElfGnuDebugLinkSection::crc() const
0047 {
0048     return *reinterpret_cast<uint32_t*>(rawData() + header()->size() - sizeof(uint32_t));
0049 }