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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.
62 lines
1.9 KiB
C++
62 lines
1.9 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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#pragma once
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#include "SoftCPU.h"
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#include "SoftMMU.h"
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#include <AK/Types.h>
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#include <LibELF/Loader.h>
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#include <LibX86/Instruction.h>
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#include <sys/types.h>
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namespace UserspaceEmulator {
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class Emulator {
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public:
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Emulator();
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bool load_elf(const ELF::Loader&);
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int exec();
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u32 virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3);
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SoftMMU& mmu() { return m_mmu; }
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private:
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SoftMMU m_mmu;
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SoftCPU m_cpu;
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void setup_stack();
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uid_t virt$getuid();
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void virt$exit(int);
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bool m_shutdown { false };
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int m_exit_status { 0 };
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};
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}
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