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/*
* Copyright (c) 2018-2020, 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.
*/
#pragma once
#include <AK/Function.h>
#include <AK/HashMap.h>
#include <AK/OwnPtr.h>
#include <AK/Vector.h>
#include <LibELF/ELFImage.h>
#ifdef KERNEL
# include <LibBareMetal/Memory/VirtualAddress.h>
class Region;
#endif
class ELFLoader {
public:
explicit ELFLoader(const u8*, size_t);
~ELFLoader();
bool load();
#if defined(KERNEL)
Function<void*(VirtualAddress, size_t, size_t, bool, bool, const String&)> alloc_section_hook;
Function<void*(size_t, size_t)> tls_section_hook;
Function<void*(VirtualAddress, size_t, size_t, size_t, bool r, bool w, bool x, const String&)> map_section_hook;
VirtualAddress entry() const { return m_image.entry(); }
#endif
char* symbol_ptr(const char* name);
bool has_symbols() const { return m_image.symbol_count(); }
String symbolicate(u32 address, u32* offset = nullptr) const;
private:
bool layout();
bool perform_relocations();
void* lookup(const ELFImage::Symbol&);
char* area_for_section(const ELFImage::Section&);
char* area_for_section_name(const char*);
struct PtrAndSize {
PtrAndSize() {}
PtrAndSize(char* p, unsigned s)
: ptr(p)
, size(s)
{
}
char* ptr { nullptr };
unsigned size { 0 };
};
ELFImage m_image;
struct SortedSymbol {
u32 address;
StringView name;
};
#ifdef KERNEL
mutable OwnPtr<Region> m_sorted_symbols_region;
#else
mutable Vector<SortedSymbol> m_sorted_symbols;
#endif
};
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