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//===- EhFrameHdr.h -------------------------------------------------------===//
//
// The MCLinker Project
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef MCLD_EHFRAMEHDR_H
#define MCLD_EHFRAMEHDR_H
#ifdef ENABLE_UNITTEST
#include <gtest.h>
#endif
#include <mcld/ADT/SizeTraits.h>
#include <cassert>
#include <mcld/LD/EhFrame.h>
namespace mcld {
class LDSection;
class MemoryArea;
class MemoryRegion;
/** \class EhFrameHdr
* \brief EhFrameHdr represents .eh_frame_hdr section.
*
* @ref lsb core generic 4.1
* .eh_frame_hdr section format
* uint8_t : version
* uint8_t : eh_frame_ptr_enc
* uint8_t : fde_count_enc
* uint8_t : table_enc
* uint32_t : eh_frame_ptr
* uint32_t : fde_count
* __________________________ when fde_count > 0
* <uint32_t, uint32_t>+ : binary search table
*/
class EhFrameHdr
{
public:
EhFrameHdr(LDSection& pEhFrameHdr, const LDSection& pEhFrame);
~EhFrameHdr();
/// sizeOutput - base on the fde count to size output
void sizeOutput();
/// emitOutput - write out eh_frame_hdr
template<size_t size>
void emitOutput(MemoryArea& pOutput)
{ assert(false && "Call invalid EhFrameHdr::emitOutput"); }
private:
/// computePCBegin - return the address of FDE's pc
/// @ref binutils gold: ehframe.cc:222
uint32_t computePCBegin(const EhFrame::FDE& pFDE, const MemoryRegion& pEhFrameRegion);
private:
/// .eh_frame_hdr section
LDSection& m_EhFrameHdr;
/// eh_frame
const LDSection& m_EhFrame;
};
//===----------------------------------------------------------------------===//
// Template Specification Functions
//===----------------------------------------------------------------------===//
/// emitOutput - write out eh_frame_hdr
template<>
void EhFrameHdr::emitOutput<32>(MemoryArea& pOutput);
template<>
void EhFrameHdr::emitOutput<64>(MemoryArea& pOutput);
} // namespace of mcld
#endif
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