1//===- EhFrameHdr.cpp -----------------------------------------------------===//
2//
3//                     The MCLinker Project
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9#include <mcld/LD/EhFrameHdr.h>
10
11using namespace mcld;
12
13//==========================
14// EhFrameHdr
15EhFrameHdr::EhFrameHdr(const EhFrame& pEhFrameData,
16                       const LDSection& pEhFrameSect,
17                       LDSection& pEhFrameHdrSect)
18  : m_EhFrameData(pEhFrameData),
19    m_EhFrameSect(pEhFrameSect),
20    m_EhFrameHdrSect(pEhFrameHdrSect)
21{
22}
23
24EhFrameHdr::~EhFrameHdr()
25{
26}
27
28/// @ref lsb core generic 4.1
29/// .eh_frame_hdr section format
30/// uint8_t : version
31/// uint8_t : eh_frame_ptr_enc
32/// uint8_t : fde_count_enc
33/// uint8_t : table_enc
34/// uint32_t : eh_frame_ptr
35/// uint32_t : fde_count
36/// __________________________ when fde_count > 0
37/// <uint32_t, uint32_t>+ : binary search table
38
39/// sizeOutput - base on the fde count to size output
40void EhFrameHdr::sizeOutput()
41{
42  size_t size = 12;
43  if (m_EhFrameData.canRecognizeAllEhFrame()) {
44    size_t fde_count = m_EhFrameData.getFDECount();
45    size += 8 * fde_count;
46  }
47  m_EhFrameHdrSect.setSize(size);
48}
49
50