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71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
/*
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* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "DwarfInfo.h"
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#include <AK/MemoryStream.h>
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namespace Debug::Dwarf {
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DwarfInfo::DwarfInfo(const ELF::Image& elf)
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: m_elf(elf)
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{
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m_debug_info_data = section_data(".debug_info");
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m_abbreviation_data = section_data(".debug_abbrev");
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m_debug_strings_data = section_data(".debug_str");
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populate_compilation_units();
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}
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ReadonlyBytes DwarfInfo::section_data(const String& section_name) const
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{
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auto section = m_elf.lookup_section(section_name);
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if (section.is_undefined())
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return {};
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return section.bytes();
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}
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void DwarfInfo::populate_compilation_units()
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{
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if (!m_debug_info_data.data())
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return;
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InputMemoryStream stream { m_debug_info_data };
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while (!stream.eof()) {
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auto unit_offset = stream.offset();
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CompilationUnitHeader compilation_unit_header {};
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stream >> Bytes { &compilation_unit_header, sizeof(compilation_unit_header) };
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ASSERT(compilation_unit_header.address_size == sizeof(u32));
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ASSERT(compilation_unit_header.version <= 4);
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u32 length_after_header = compilation_unit_header.length - (sizeof(CompilationUnitHeader) - offsetof(CompilationUnitHeader, version));
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m_compilation_units.empend(*this, unit_offset, compilation_unit_header);
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stream.discard_or_error(length_after_header);
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}
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}
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}
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