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21d5f4ada1
This was supposed to be the foundation for some kind of pre-kernel environment, but nobody is working on it right now, so let's move everything back into the kernel and remove all the confusion.
109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020, 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 <AK/Function.h>
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#include <AK/HashMap.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/OwnPtr.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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#include <LibELF/Image.h>
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#ifdef KERNEL
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# include <Kernel/VirtualAddress.h>
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namespace Kernel {
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class Region;
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}
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#endif
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namespace ELF {
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class Loader : public RefCounted<Loader> {
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public:
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static NonnullRefPtr<Loader> create(const u8* data, size_t size) { return adopt(*new Loader(data, size)); }
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~Loader();
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bool load();
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#if defined(KERNEL)
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Function<void*(VirtualAddress, size_t, size_t, bool, bool, const String&)> alloc_section_hook;
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Function<void*(size_t, size_t)> tls_section_hook;
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Function<void*(VirtualAddress, size_t, size_t, size_t, bool r, bool w, bool x, const String&)> map_section_hook;
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#endif
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VirtualAddress entry() const
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{
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return m_image.entry();
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}
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const Image& image() const { return m_image; }
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char* symbol_ptr(const char* name) const;
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Optional<Image::Symbol> find_demangled_function(const String& name) const;
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bool has_symbols() const { return m_symbol_count; }
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String symbolicate(u32 address, u32* offset = nullptr) const;
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Optional<Image::Symbol> find_symbol(u32 address, u32* offset = nullptr) const;
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private:
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explicit Loader(const u8*, size_t);
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bool layout();
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bool perform_relocations();
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void* lookup(const ELF::Image::Symbol&);
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char* area_for_section(const ELF::Image::Section&);
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char* area_for_section_name(const char*);
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struct PtrAndSize {
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PtrAndSize() {}
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PtrAndSize(char* p, unsigned s)
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: ptr(p)
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, size(s)
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{
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}
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char* ptr { nullptr };
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unsigned size { 0 };
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};
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Image m_image;
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size_t m_symbol_count { 0 };
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struct SortedSymbol {
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u32 address;
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StringView name;
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#ifndef KERNEL
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String demangled_name;
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Optional<Image::Symbol> symbol;
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#endif
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};
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#ifdef KERNEL
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mutable OwnPtr<Kernel::Region> m_sorted_symbols_region;
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#else
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mutable Vector<SortedSymbol> m_sorted_symbols;
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#endif
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};
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} // end namespace ELF
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