mirror of
https://github.com/RGBCube/serenity
synced 2025-05-31 05:08:13 +00:00
8d8bb07476
This introduces a new X86 CPU emulator for running SerenityOS userspace programs in a virtualized interpreter environment. The main goal is to be able to instrument memory accesses and catch interesting bugs that are very hard to find otherwise. But before we can do fancy things like that, we have to build a competent emulator able to actually run programs. This initial version is able to run a very small program that makes some tiny syscalls, but nothing more.
62 lines
2.5 KiB
C++
62 lines
2.5 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "Emulator.h"
|
|
#include "SoftCPU.h"
|
|
#include <AK/LogStream.h>
|
|
#include <AK/MappedFile.h>
|
|
#include <LibCore/ArgsParser.h>
|
|
#include <LibELF/Loader.h>
|
|
#include <LibX86/Instruction.h>
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
const char* executable_path = nullptr;
|
|
|
|
Core::ArgsParser args_parser;
|
|
args_parser.add_positional_argument(executable_path, "Executable path", "executable");
|
|
args_parser.parse(argc, argv);
|
|
|
|
MappedFile mapped_file(executable_path);
|
|
if (!mapped_file.is_valid()) {
|
|
warn() << "Unable to map " << executable_path;
|
|
return 1;
|
|
}
|
|
|
|
auto elf = ELF::Loader::create((const u8*)mapped_file.data(), mapped_file.size());
|
|
|
|
auto main_symbol = elf->find_demangled_function("main");
|
|
if (!main_symbol.has_value()) {
|
|
warn() << "Could not find 'main' symbol in executable";
|
|
return 1;
|
|
}
|
|
|
|
auto main_code = main_symbol.value().raw_data();
|
|
X86::SimpleInstructionStream stream((const u8*)main_code.characters_without_null_termination(), main_code.length());
|
|
|
|
UserspaceEmulator::Emulator emulator;
|
|
return emulator.exec(stream, main_symbol.value().value());
|
|
}
|