| //===- MipsLA25Stub.cpp ---------------------------------------------------===// |
| // |
| // The MCLinker Project |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| #include <mcld/LD/ResolveInfo.h> |
| #include "MipsLA25Stub.h" |
| #include "MipsLDBackend.h" |
| |
| namespace { |
| |
| const uint32_t STUB[] = { |
| 0x3c190000, // lui $25,%hi(func) |
| 0x08000000, // j func |
| 0x27390000, // add $25,$25,%lo(func) |
| 0x00000000 // nop |
| }; |
| |
| enum { |
| // Fake relocations for patching LA25 stubs. |
| R_MIPS_LA25_LUI = 200, |
| R_MIPS_LA25_J = 201, |
| R_MIPS_LA25_ADD = 202 |
| }; |
| |
| } |
| |
| namespace mcld { |
| |
| //===----------------------------------------------------------------------===// |
| // MipsLA25Stub |
| //===----------------------------------------------------------------------===// |
| |
| MipsLA25Stub::MipsLA25Stub(const MipsGNULDBackend& pTarget) |
| : m_Target(pTarget), |
| m_Name("MipsLA25_Prototype"), |
| m_pData(STUB), |
| m_Size(sizeof(STUB)) |
| { |
| addFixup(0, 0x0, R_MIPS_LA25_LUI); |
| addFixup(4, 0x0, R_MIPS_LA25_J); |
| addFixup(8, 0x0, R_MIPS_LA25_ADD); |
| } |
| |
| MipsLA25Stub::MipsLA25Stub(const MipsGNULDBackend& pTarget, |
| const uint32_t* pData, |
| size_t pSize, |
| const_fixup_iterator pBegin, |
| const_fixup_iterator pEnd) |
| : m_Target(pTarget), |
| m_Name("pic"), |
| m_pData(pData), |
| m_Size(pSize) |
| { |
| for (const_fixup_iterator it = pBegin, ie = pEnd; it != ie; ++it) |
| addFixup(**it); |
| } |
| |
| bool MipsLA25Stub::isMyDuty(const Relocation& pReloc, |
| uint64_t pSource, |
| uint64_t pTargetSymValue) const |
| { |
| if (llvm::ELF::R_MIPS_26 != pReloc.type()) |
| return false; |
| |
| const ResolveInfo* rsym = pReloc.symInfo(); |
| |
| if (!rsym->isDefine()) |
| return false; |
| |
| if (rsym->isDyn() || rsym->isUndef()) |
| return false; |
| |
| if (!m_Target.hasNonPICBranch(rsym)) |
| return false; |
| |
| return true; |
| } |
| |
| const std::string& MipsLA25Stub::name() const |
| { |
| return m_Name; |
| } |
| |
| const uint8_t* MipsLA25Stub::getContent() const |
| { |
| return reinterpret_cast<const uint8_t*>(m_pData); |
| } |
| |
| size_t MipsLA25Stub::size() const |
| { |
| return m_Size; |
| } |
| |
| size_t MipsLA25Stub::alignment() const |
| { |
| return 4; |
| } |
| |
| Stub* MipsLA25Stub::doClone() |
| { |
| return new MipsLA25Stub(m_Target, m_pData, m_Size, |
| fixup_begin(), fixup_end()); |
| } |
| |
| } //end mcld namespace |