1f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines//===- HexagonAbsoluteStub.cpp ---------------------------------------------------===// 2f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// 3f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// The MCLinker Project 4f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// 5f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// This file is distributed under the University of Illinois Open Source 6f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// License. See LICENSE.TXT for details. 7f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// 8f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines//===----------------------------------------------------------------------===// 9f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 10f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines#include "HexagonAbsoluteStub.h" 11f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines#include "HexagonLDBackend.h" 12f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 13f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines#include <llvm/Support/ELF.h> 14f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines#include <mcld/LD/ResolveInfo.h> 15f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines#include <mcld/LD/LDSymbol.h> 16f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines#include <mcld/Fragment/Relocation.h> 17f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 18f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hinesusing namespace mcld; 19f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 20f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines//===----------------------------------------------------------------------===// 21f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines// HexagonAbsoluteStub 22f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines//===----------------------------------------------------------------------===// 23f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 24f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hinesconst uint32_t HexagonAbsoluteStub::TEMPLATE[] = { 25f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 0xbffd7f1d, /* { sp = add (sp, #-8) */ 26f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 0xa79dfcfe, /* memw (sp + #-8) = r28 } */ 27f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 0x723cc000, /* r28.h = #HI (foo) */ 28f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 0x713cc000, /* r28.l = #LO (foo) */ 29f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 0xb01d411d, /* { sp = add (sp, #8) */ 30f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 0x529c4000, /* jumpr r28 */ 31f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 0x919dc01c /* r28 = memw (sp) } */ 32f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines}; 33f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 34f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines#define FITS_IN_NBITS(D, B) \ 35f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines ((int64_t) abs (D) < (~(~(int64_t) 0 << ((B) - 1)) & -(4 * 4))) 36f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 37f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen HinesHexagonAbsoluteStub::HexagonAbsoluteStub(bool pIsOutputPIC) 38f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines : Stub(), m_Name("HexagonTrampoline"), m_pData(NULL), m_Size(0x0) 39f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines{ 40f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines m_pData = TEMPLATE; 41f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines m_Size = sizeof(TEMPLATE); 42f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines addFixup(8u, 0x0, llvm::ELF::R_HEX_HI16); 43f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines addFixup(12u, 0x0, llvm::ELF::R_HEX_LO16); 44f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines} 45f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 46f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines/// for doClone 47f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen HinesHexagonAbsoluteStub::HexagonAbsoluteStub(const uint32_t* pData, 48f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines size_t pSize, 49f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines const_fixup_iterator pBegin, 50f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines const_fixup_iterator pEnd) 51f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines : Stub(), m_Name("AbsVeneer"), m_pData(pData), m_Size(pSize) 52f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines{ 53f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines for (const_fixup_iterator it = pBegin, ie = pEnd; it != ie; ++it) 54f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines addFixup(**it); 55f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines} 56f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 57f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen HinesHexagonAbsoluteStub::~HexagonAbsoluteStub() 58f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines{ 59f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines} 60f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 61f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hinesbool HexagonAbsoluteStub::isMyDuty(const class Relocation& pReloc, 62f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines uint64_t pSource, 63f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines uint64_t pTargetSymValue) const 64f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines{ 65f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines int nbits = 0; 66f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines switch (pReloc.type()) { 67f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::ELF::R_HEX_B22_PCREL: 68f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines nbits = 24; 69f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 70f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::ELF::R_HEX_B15_PCREL: 71f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines nbits = 17; 72f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 73f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::ELF::R_HEX_B7_PCREL: 74f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines nbits = 9; 75f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 76f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::ELF::R_HEX_B13_PCREL: 77f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines nbits = 15; 78f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 79f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines case llvm::ELF::R_HEX_B9_PCREL: 80f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines nbits = 17; 81f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines break; 82f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines default: 83f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines return false; 84f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines } 85f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 86f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines int64_t offset = pTargetSymValue - pSource; 87f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines // if offset is going to fit in nbits then we dont 88f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines // need a stub to be created 89f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines if (FITS_IN_NBITS(offset, nbits)) 90f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines return false; 91f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines return true; 92f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines} 93f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 94f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hinesconst std::string& HexagonAbsoluteStub::name() const 95f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines{ 96f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines return m_Name; 97f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines} 98f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 99f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hinesconst uint8_t* HexagonAbsoluteStub::getContent() const 100f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines{ 101f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines return reinterpret_cast<const uint8_t*>(m_pData); 102f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines} 103f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 104f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hinessize_t HexagonAbsoluteStub::size() const 105f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines{ 106f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines return m_Size; 107f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines} 108f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 109f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hinessize_t HexagonAbsoluteStub::alignment() const 110f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines{ 111f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines return 4u; 112f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines} 113f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines 114f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen HinesStub* HexagonAbsoluteStub::doClone() 115f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines{ 116f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines return new HexagonAbsoluteStub(m_pData, m_Size, fixup_begin(), fixup_end()); 117f7ac0f19a1c8d0ad14bcf6456ce368b830fea886Stephen Hines} 118