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https://github.com/RGBCube/serenity
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ae1d14bc7a
This patch adds a basic ELF program loader to the UserspaceEmulator and creates MMU regions for each PT_LOAD header. (Note that we don't yet respect the R/W/X flags etc.) We also turn the SoftCPU into an X86::InstructionStream and give it an EIP register so we can actually execute code by fetching memory through our MMU abstraction.
55 lines
2.1 KiB
C++
55 lines
2.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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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 "Emulator.h"
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#include "SoftCPU.h"
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#include <AK/LogStream.h>
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#include <AK/MappedFile.h>
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#include <LibCore/ArgsParser.h>
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#include <LibELF/Loader.h>
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int main(int argc, char** argv)
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{
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const char* executable_path = nullptr;
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Core::ArgsParser args_parser;
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args_parser.add_positional_argument(executable_path, "Executable path", "executable");
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args_parser.parse(argc, argv);
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MappedFile mapped_file(executable_path);
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if (!mapped_file.is_valid()) {
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warn() << "Unable to map " << executable_path;
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return 1;
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}
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auto elf = ELF::Loader::create((const u8*)mapped_file.data(), mapped_file.size());
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UserspaceEmulator::Emulator emulator;
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if (!emulator.load_elf(*elf))
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return 1;
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return emulator.exec();
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}
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