mirror of
https://github.com/RGBCube/serenity
synced 2025-05-14 17:44:58 +00:00
3f35ffb648
As `_string` can't fail anymore (since 3434412), there are no real
benefits to use the short variant in most cases.
110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
/*
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* Copyright (c) 2020, Luke Wilde <lukew@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "DisassemblyModel.h"
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#include <AK/StringBuilder.h>
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#include <LibCore/MappedFile.h>
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#include <LibDebug/DebugSession.h>
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#include <LibELF/Image.h>
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#include <LibSymbolication/Symbolication.h>
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#include <LibX86/Disassembler.h>
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#include <LibX86/ELFSymbolProvider.h>
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#include <stdio.h>
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namespace HackStudio {
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DisassemblyModel::DisassemblyModel(Debug::DebugSession const& debug_session, PtraceRegisters const& regs)
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{
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auto lib = debug_session.library_at(regs.ip());
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if (!lib)
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return;
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auto containing_function = lib->debug_info->get_containing_function(regs.ip() - lib->base_address);
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if (!containing_function.has_value()) {
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dbgln("Cannot disassemble as the containing function was not found.");
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return;
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}
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OwnPtr<ELF::Image> kernel_elf;
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const ELF::Image* elf = nullptr;
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auto maybe_kernel_base = Symbolication::kernel_base();
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if (maybe_kernel_base.has_value() && containing_function.value().address_low >= maybe_kernel_base.value()) {
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auto file_or_error = Core::MappedFile::map("/boot/Kernel.debug"sv);
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if (file_or_error.is_error())
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return;
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kernel_elf = make<ELF::Image>(file_or_error.value()->bytes());
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elf = kernel_elf.ptr();
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} else {
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elf = &lib->debug_info->elf();
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}
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auto symbol = elf->find_symbol(containing_function.value().address_low);
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if (!symbol.has_value())
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return;
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VERIFY(symbol.has_value());
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auto view = symbol.value().raw_data();
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X86::ELFSymbolProvider symbol_provider(*elf);
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X86::SimpleInstructionStream stream((u8 const*)view.characters_without_null_termination(), view.length());
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X86::Disassembler disassembler(stream);
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size_t offset_into_symbol = 0;
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for (;;) {
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auto insn = disassembler.next();
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if (!insn.has_value())
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break;
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FlatPtr address_in_profiled_program = symbol.value().value() + offset_into_symbol;
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auto disassembly = insn.value().to_deprecated_string(address_in_profiled_program, &symbol_provider);
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StringView instruction_bytes = view.substring_view(offset_into_symbol, insn.value().length());
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m_instructions.append({ insn.value(), disassembly, instruction_bytes, address_in_profiled_program });
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offset_into_symbol += insn.value().length();
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}
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}
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int DisassemblyModel::row_count(const GUI::ModelIndex&) const
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{
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return m_instructions.size();
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}
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ErrorOr<String> DisassemblyModel::column_name(int column) const
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{
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switch (column) {
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case Column::Address:
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return "Address"_string;
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case Column::InstructionBytes:
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return "Insn Bytes"_string;
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case Column::Disassembly:
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return "Disassembly"_string;
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default:
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VERIFY_NOT_REACHED();
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}
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}
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GUI::Variant DisassemblyModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
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{
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auto& insn = m_instructions[index.row()];
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if (role == GUI::ModelRole::Display) {
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if (index.column() == Column::Address)
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return DeprecatedString::formatted("{:p}", insn.address);
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if (index.column() == Column::InstructionBytes) {
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StringBuilder builder;
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for (auto ch : insn.bytes)
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builder.appendff("{:02x} ", static_cast<unsigned char>(ch));
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return builder.to_deprecated_string();
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}
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if (index.column() == Column::Disassembly)
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return insn.disassembly;
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return {};
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}
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return {};
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}
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}
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