| //===- ELFFileFormat.cpp --------------------------------------------------===// |
| // |
| // The MCLinker Project |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| #include <mcld/LD/ELFFileFormat.h> |
| #include <mcld/MC/MCLinker.h> |
| #include <mcld/MC/MCLDFile.h> |
| #include <llvm/Support/ELF.h> |
| #include <mcld/Target/GNULDBackend.h> |
| |
| using namespace mcld; |
| |
| ELFFileFormat::ELFFileFormat(GNULDBackend& pBackend) |
| : f_Backend(pBackend), |
| f_pNULLSection(NULL), |
| f_pGOT(NULL), |
| f_pPLT(NULL), |
| f_pRelDyn(NULL), |
| f_pRelPlt(NULL), |
| f_pRelaDyn(NULL), |
| f_pRelaPlt(NULL), |
| f_pComment(NULL), |
| f_pData1(NULL), |
| f_pDebug(NULL), |
| f_pDynamic(NULL), |
| f_pDynStrTab(NULL), |
| f_pDynSymTab(NULL), |
| f_pFini(NULL), |
| f_pFiniArray(NULL), |
| f_pHashTab(NULL), |
| f_pInit(NULL), |
| f_pInitArray(NULL), |
| f_pInterp(NULL), |
| f_pLine(NULL), |
| f_pNote(NULL), |
| f_pPreInitArray(NULL), |
| f_pROData1(NULL), |
| f_pShStrTab(NULL), |
| f_pStrTab(NULL), |
| f_pSymTab(NULL), |
| f_pTBSS(NULL), |
| f_pTData(NULL), |
| f_pCtors(NULL), |
| f_pDataRelRo(NULL), |
| f_pDtors(NULL), |
| f_pEhFrame(NULL), |
| f_pEhFrameHdr(NULL), |
| f_pGCCExceptTable(NULL), |
| f_pGNUVersion(NULL), |
| f_pGNUVersionD(NULL), |
| f_pGNUVersionR(NULL), |
| f_pGOTPLT(NULL), |
| f_pJCR(NULL), |
| f_pNoteABITag(NULL), |
| f_pStab(NULL), |
| f_pStabStr(NULL), |
| f_pStack(NULL) { |
| |
| } |
| |
| ELFFileFormat::~ELFFileFormat() |
| { |
| } |
| |
| void ELFFileFormat::initObjectFormat(MCLinker& pLinker) |
| { |
| f_pTextSection = &pLinker.getOrCreateOutputSectHdr(".text", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_EXECINSTR, |
| 0x1); |
| f_pNULLSection = &pLinker.getOrCreateOutputSectHdr("", |
| LDFileFormat::Null, |
| llvm::ELF::SHT_NULL, |
| 0x0); |
| f_pReadOnlySection = &pLinker.getOrCreateOutputSectHdr(".rodata", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC, |
| 0x1); |
| |
| f_pBSSSection = &pLinker.getOrCreateOutputSectHdr(".bss", |
| LDFileFormat::BSS, |
| llvm::ELF::SHT_NOBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| f_pComment = &pLinker.getOrCreateOutputSectHdr(".comment", |
| LDFileFormat::MetaData, |
| llvm::ELF::SHT_PROGBITS, |
| 0x0, |
| 0x1); |
| f_pDataSection = &pLinker.getOrCreateOutputSectHdr(".data", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| f_pData1 = &pLinker.getOrCreateOutputSectHdr(".data1", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| f_pDebug = &pLinker.getOrCreateOutputSectHdr(".debug", |
| LDFileFormat::Debug, |
| llvm::ELF::SHT_PROGBITS, |
| 0x0, |
| 0x1); |
| f_pInit = &pLinker.getOrCreateOutputSectHdr(".init", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_EXECINSTR, |
| 0x1); |
| f_pInitArray = &pLinker.getOrCreateOutputSectHdr(".init_array", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_INIT_ARRAY, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| f_pFini = &pLinker.getOrCreateOutputSectHdr(".fini", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_EXECINSTR, |
| 0x1); |
| f_pFiniArray = &pLinker.getOrCreateOutputSectHdr(".fini_array", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_FINI_ARRAY, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| f_pLine = &pLinker.getOrCreateOutputSectHdr(".line", |
| LDFileFormat::Debug, |
| llvm::ELF::SHT_PROGBITS, |
| 0x0, |
| 0x1); |
| f_pPreInitArray = &pLinker.getOrCreateOutputSectHdr(".preinit_array", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PREINIT_ARRAY, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| // the definition of SHF_XXX attributes of rodata in Linux Standard Base |
| // conflicts with System V standard. We follow System V standard. |
| f_pROData1 = &pLinker.getOrCreateOutputSectHdr(".rodata1", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC, |
| 0x1); |
| f_pShStrTab = &pLinker.getOrCreateOutputSectHdr(".shstrtab", |
| LDFileFormat::NamePool, |
| llvm::ELF::SHT_STRTAB, |
| 0x0, |
| 0x1); |
| // In ELF Spec Book I, p1-16. If symbol table and string table are in |
| // loadable segments, set the attribute to SHF_ALLOC bit. But in the |
| // real world, this bit always turn off. |
| f_pSymTab = &pLinker.getOrCreateOutputSectHdr(".symtab", |
| LDFileFormat::NamePool, |
| llvm::ELF::SHT_SYMTAB, |
| 0x0, |
| f_Backend.bitclass() / 8); |
| f_pStrTab = &pLinker.getOrCreateOutputSectHdr(".strtab", |
| LDFileFormat::NamePool, |
| llvm::ELF::SHT_STRTAB, |
| 0x0, |
| 0x1); |
| f_pTBSS = &pLinker.getOrCreateOutputSectHdr(".tbss", |
| LDFileFormat::BSS, |
| llvm::ELF::SHT_NOBITS, |
| llvm::ELF::SHF_ALLOC | |
| llvm::ELF::SHF_WRITE | |
| llvm::ELF::SHF_TLS, |
| 0x1); |
| f_pTData = &pLinker.getOrCreateOutputSectHdr(".tdata", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | |
| llvm::ELF::SHF_WRITE | |
| llvm::ELF::SHF_TLS, |
| 0x1); |
| |
| /// @ref 10.3.1.2, ISO/IEC 23360, Part 1:2010(E), p. 24. |
| f_pCtors = &pLinker.getOrCreateOutputSectHdr(".ctor", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| f_pDataRelRo = &pLinker.getOrCreateOutputSectHdr(".data.rel.ro", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| f_pDtors = &pLinker.getOrCreateOutputSectHdr(".dtors", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| f_pEhFrame = &pLinker.getOrCreateOutputSectHdr(".eh_frame", |
| LDFileFormat::EhFrame, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC, |
| 0x4); |
| f_pGCCExceptTable = &pLinker.getOrCreateOutputSectHdr(".gcc_except_table", |
| LDFileFormat::GCCExceptTable, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC, |
| 0x4); |
| f_pGNUVersion = &pLinker.getOrCreateOutputSectHdr(".gnu.version", |
| LDFileFormat::Version, |
| llvm::ELF::SHT_GNU_versym, |
| llvm::ELF::SHF_ALLOC, |
| 0x1); |
| f_pGNUVersionD = &pLinker.getOrCreateOutputSectHdr(".gnu.version_d", |
| LDFileFormat::Version, |
| llvm::ELF::SHT_GNU_verdef, |
| llvm::ELF::SHF_ALLOC, |
| 0x1); |
| f_pGNUVersionR = &pLinker.getOrCreateOutputSectHdr(".gnu.version_r", |
| LDFileFormat::Version, |
| llvm::ELF::SHT_GNU_verneed, |
| llvm::ELF::SHF_ALLOC, |
| 0x1); |
| f_pJCR = &pLinker.getOrCreateOutputSectHdr(".jcr", |
| LDFileFormat::Regular, |
| llvm::ELF::SHT_PROGBITS, |
| llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE, |
| 0x1); |
| f_pStab = &pLinker.getOrCreateOutputSectHdr(".stab", |
| LDFileFormat::Debug, |
| llvm::ELF::SHT_PROGBITS, |
| 0x0, |
| 0x1); |
| f_pStabStr = &pLinker.getOrCreateOutputSectHdr(".stabstr", |
| LDFileFormat::Debug, |
| llvm::ELF::SHT_STRTAB, |
| 0x0, |
| 0x1); |
| } |
| |
