mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 14:42:44 +00:00
74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include "AbbreviationsMap.h"
|
|
#include "DwarfInfo.h"
|
|
|
|
#include <AK/MemoryStream.h>
|
|
|
|
namespace Debug::Dwarf {
|
|
|
|
AbbreviationsMap::AbbreviationsMap(DwarfInfo const& dwarf_info, u32 offset)
|
|
: m_dwarf_info(dwarf_info)
|
|
, m_offset(offset)
|
|
{
|
|
populate_map();
|
|
}
|
|
|
|
void AbbreviationsMap::populate_map()
|
|
{
|
|
InputMemoryStream abbreviation_stream(m_dwarf_info.abbreviation_data());
|
|
abbreviation_stream.discard_or_error(m_offset);
|
|
|
|
while (!abbreviation_stream.eof()) {
|
|
size_t abbreviation_code = 0;
|
|
abbreviation_stream.read_LEB128_unsigned(abbreviation_code);
|
|
// An abbreviation code of 0 marks the end of the
|
|
// abbreviations for a given compilation unit
|
|
if (abbreviation_code == 0)
|
|
break;
|
|
|
|
size_t tag {};
|
|
abbreviation_stream.read_LEB128_unsigned(tag);
|
|
|
|
u8 has_children = 0;
|
|
abbreviation_stream >> has_children;
|
|
|
|
AbbreviationEntry abbrevation_entry {};
|
|
abbrevation_entry.tag = static_cast<EntryTag>(tag);
|
|
abbrevation_entry.has_children = (has_children == 1);
|
|
|
|
AttributeSpecification current_attribute_specification {};
|
|
do {
|
|
size_t attribute_value = 0;
|
|
size_t form_value = 0;
|
|
abbreviation_stream.read_LEB128_unsigned(attribute_value);
|
|
abbreviation_stream.read_LEB128_unsigned(form_value);
|
|
|
|
current_attribute_specification.attribute = static_cast<Attribute>(attribute_value);
|
|
current_attribute_specification.form = static_cast<AttributeDataForm>(form_value);
|
|
|
|
if (current_attribute_specification.form == AttributeDataForm::ImplicitConst) {
|
|
ssize_t data_value;
|
|
abbreviation_stream.read_LEB128_signed(data_value);
|
|
current_attribute_specification.value = data_value;
|
|
}
|
|
|
|
if (current_attribute_specification.attribute != Attribute::None) {
|
|
abbrevation_entry.attribute_specifications.append(current_attribute_specification);
|
|
}
|
|
} while (current_attribute_specification.attribute != Attribute::None || current_attribute_specification.form != AttributeDataForm::None);
|
|
|
|
m_entries.set((u32)abbreviation_code, move(abbrevation_entry));
|
|
}
|
|
}
|
|
|
|
Optional<AbbreviationsMap::AbbreviationEntry> AbbreviationsMap::get(u32 code) const
|
|
{
|
|
return m_entries.get(code);
|
|
}
|
|
|
|
}
|