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