1affc150dc44fab1911775a49636d0ce85333b634Zonr Chang//===- EhFrameHdr.h -------------------------------------------------------===// 2affc150dc44fab1911775a49636d0ce85333b634Zonr Chang// 3affc150dc44fab1911775a49636d0ce85333b634Zonr Chang// The MCLinker Project 4affc150dc44fab1911775a49636d0ce85333b634Zonr Chang// 5affc150dc44fab1911775a49636d0ce85333b634Zonr Chang// This file is distributed under the University of Illinois Open Source 6affc150dc44fab1911775a49636d0ce85333b634Zonr Chang// License. See LICENSE.TXT for details. 7affc150dc44fab1911775a49636d0ce85333b634Zonr Chang// 8affc150dc44fab1911775a49636d0ce85333b634Zonr Chang//===----------------------------------------------------------------------===// 987f34658dec9097d987d254a990ea7f311bfc95fStephen Hines#ifndef MCLD_LD_EHFRAMEHDR_H 1087f34658dec9097d987d254a990ea7f311bfc95fStephen Hines#define MCLD_LD_EHFRAMEHDR_H 11affc150dc44fab1911775a49636d0ce85333b634Zonr Chang#include <mcld/ADT/SizeTraits.h> 1222add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao#include <cassert> 1322add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao 14affc150dc44fab1911775a49636d0ce85333b634Zonr Chang#include <mcld/LD/EhFrame.h> 1587f34658dec9097d987d254a990ea7f311bfc95fStephen Hines#include <mcld/Support/FileOutputBuffer.h> 1622add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liaonamespace mcld { 17affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 18affc150dc44fab1911775a49636d0ce85333b634Zonr Changclass LDSection; 1987f34658dec9097d987d254a990ea7f311bfc95fStephen Hinesclass FileOutputBuffer; 20affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 21affc150dc44fab1911775a49636d0ce85333b634Zonr Chang/** \class EhFrameHdr 22affc150dc44fab1911775a49636d0ce85333b634Zonr Chang * \brief EhFrameHdr represents .eh_frame_hdr section. 2322add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * 2422add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * @ref lsb core generic 4.1 2522add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * .eh_frame_hdr section format 2622add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * uint8_t : version 2722add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * uint8_t : eh_frame_ptr_enc 2822add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * uint8_t : fde_count_enc 2922add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * uint8_t : table_enc 3022add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * uint32_t : eh_frame_ptr 3122add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * uint32_t : fde_count 3222add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * __________________________ when fde_count > 0 3322add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao * <uint32_t, uint32_t>+ : binary search table 34affc150dc44fab1911775a49636d0ce85333b634Zonr Chang */ 35affc150dc44fab1911775a49636d0ce85333b634Zonr Changclass EhFrameHdr 36affc150dc44fab1911775a49636d0ce85333b634Zonr Chang{ 37affc150dc44fab1911775a49636d0ce85333b634Zonr Changpublic: 3822add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao EhFrameHdr(LDSection& pEhFrameHdr, const LDSection& pEhFrame); 39affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 40affc150dc44fab1911775a49636d0ce85333b634Zonr Chang ~EhFrameHdr(); 41affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 42affc150dc44fab1911775a49636d0ce85333b634Zonr Chang /// sizeOutput - base on the fde count to size output 43affc150dc44fab1911775a49636d0ce85333b634Zonr Chang void sizeOutput(); 44affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 45affc150dc44fab1911775a49636d0ce85333b634Zonr Chang /// emitOutput - write out eh_frame_hdr 46affc150dc44fab1911775a49636d0ce85333b634Zonr Chang template<size_t size> 4787f34658dec9097d987d254a990ea7f311bfc95fStephen Hines void emitOutput(FileOutputBuffer& pOutput) 4822add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao { assert(false && "Call invalid EhFrameHdr::emitOutput"); } 49affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 50affc150dc44fab1911775a49636d0ce85333b634Zonr Changprivate: 5122add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao /// computePCBegin - return the address of FDE's pc 5222add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao /// @ref binutils gold: ehframe.cc:222 5387f34658dec9097d987d254a990ea7f311bfc95fStephen Hines uint32_t computePCBegin(const EhFrame::FDE& pFDE, 5487f34658dec9097d987d254a990ea7f311bfc95fStephen Hines const MemoryRegion& pEhFrameRegion); 55affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 56affc150dc44fab1911775a49636d0ce85333b634Zonr Changprivate: 57affc150dc44fab1911775a49636d0ce85333b634Zonr Chang /// .eh_frame_hdr section 5822add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao LDSection& m_EhFrameHdr; 5922add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao 6022add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao /// eh_frame 6122add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao const LDSection& m_EhFrame; 62affc150dc44fab1911775a49636d0ce85333b634Zonr Chang}; 63affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 6422add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao//===----------------------------------------------------------------------===// 6522add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao// Template Specification Functions 6622add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao//===----------------------------------------------------------------------===// 6722add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liao/// emitOutput - write out eh_frame_hdr 6822add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liaotemplate<> 6987f34658dec9097d987d254a990ea7f311bfc95fStephen Hinesvoid EhFrameHdr::emitOutput<32>(FileOutputBuffer& pOutput); 70affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 71affc150dc44fab1911775a49636d0ce85333b634Zonr Chang} // namespace of mcld 72affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 73affc150dc44fab1911775a49636d0ce85333b634Zonr Chang#endif 74affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 75