X86GOTPLT.cpp revision 6f75755c9204b1d8817ae5a65a2f7e5af0ec3f70 
1//===- X86GOTPLT.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 "X86GOTPLT.h"
10#include "X86PLT.h"
11
12#include <llvm/Support/Casting.h>
13
14#include <mcld/LD/LDSection.h>
15#include <mcld/LD/LDFileFormat.h>
16#include <mcld/Support/MsgHandling.h>
17
18namespace mcld {
19
20//===----------------------------------------------------------------------===//
21// X86_32GOTPLT
22//===----------------------------------------------------------------------===//
23X86_32GOTPLT::X86_32GOTPLT(LDSection& pSection)
24  : X86_32GOT(pSection)
25{
26  // Create GOT0 entries
27  reserve(X86GOTPLT0Num);
28
29  // Skip GOT0 entries
30  for (size_t i = 0; i < X86GOTPLT0Num; ++i) {
31    consume();
32  }
33}
34
35X86_32GOTPLT::~X86_32GOTPLT()
36{
37}
38
39bool X86_32GOTPLT::hasGOT1() const
40{
41  return (m_SectionData->size() > X86GOTPLT0Num);
42}
43
44void X86_32GOTPLT::applyGOT0(uint64_t pAddress)
45{
46  llvm::cast<X86_32GOTEntry>
47    (*(m_SectionData->getFragmentList().begin())).setValue(pAddress);
48}
49
50void X86_32GOTPLT::applyAllGOTPLT(const X86PLT& pPLT)
51{
52  iterator it = begin();
53  // skip GOT0
54  for (size_t i = 0; i < X86GOTPLT0Num; ++i)
55    ++it;
56  // address of corresponding plt entry
57  uint64_t plt_addr = pPLT.addr() + pPLT.getPLT0Size();
58  for (; it != end() ; ++it) {
59    llvm::cast<X86_32GOTEntry>(*it).setValue(plt_addr + 6);
60    plt_addr += pPLT.getPLT1Size();
61  }
62}
63
64//===----------------------------------------------------------------------===//
65// X86_64GOTPLT
66//===----------------------------------------------------------------------===//
67X86_64GOTPLT::X86_64GOTPLT(LDSection& pSection)
68  : X86_64GOT(pSection)
69{
70  // Create GOT0 entries
71  reserve(X86GOTPLT0Num);
72
73  // Skip GOT0 entries
74  for (size_t i = 0; i < X86GOTPLT0Num; ++i) {
75    consume();
76  }
77}
78
79X86_64GOTPLT::~X86_64GOTPLT()
80{
81}
82
83bool X86_64GOTPLT::hasGOT1() const
84{
85  return (m_SectionData->size() > X86GOTPLT0Num);
86}
87
88void X86_64GOTPLT::applyGOT0(uint64_t pAddress)
89{
90  llvm::cast<X86_64GOTEntry>
91    (*(m_SectionData->getFragmentList().begin())).setValue(pAddress);
92}
93
94void X86_64GOTPLT::applyAllGOTPLT(const X86PLT& pPLT)
95{
96  iterator it = begin();
97  // skip GOT0
98  for (size_t i = 0; i < X86GOTPLT0Num; ++i)
99    ++it;
100  // address of corresponding plt entry
101  uint64_t plt_addr = pPLT.addr() + pPLT.getPLT0Size();
102  for (; it != end() ; ++it) {
103    llvm::cast<X86_64GOTEntry>(*it).setValue(plt_addr + 6);
104    plt_addr += pPLT.getPLT1Size();
105  }
106}
107
108} //end mcld namespace
109