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Diffstat (limited to 'contrib/llvm/lib/CodeGen/ELFWriter.h')
| -rw-r--r-- | contrib/llvm/lib/CodeGen/ELFWriter.h | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/contrib/llvm/lib/CodeGen/ELFWriter.h b/contrib/llvm/lib/CodeGen/ELFWriter.h deleted file mode 100644 index 6f7fbac..0000000 --- a/contrib/llvm/lib/CodeGen/ELFWriter.h +++ /dev/null @@ -1,251 +0,0 @@ -//===-- ELFWriter.h - Target-independent ELF writer support -----*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file defines the ELFWriter class. -// -//===----------------------------------------------------------------------===// - -#ifndef ELFWRITER_H -#define ELFWRITER_H - -#include "llvm/ADT/SetVector.h" -#include "llvm/CodeGen/MachineFunctionPass.h" -#include <map> - -namespace llvm { - class BinaryObject; - class Constant; - class ConstantInt; - class ConstantStruct; - class ELFCodeEmitter; - class ELFRelocation; - class ELFSection; - struct ELFSym; - class GlobalVariable; - class JITDebugRegisterer; - class Mangler; - class MachineCodeEmitter; - class MachineConstantPoolEntry; - class ObjectCodeEmitter; - class MCAsmInfo; - class TargetELFWriterInfo; - class TargetLoweringObjectFile; - class raw_ostream; - class SectionKind; - class MCContext; - class TargetMachine; - - typedef std::vector<ELFSym*>::iterator ELFSymIter; - typedef std::vector<ELFSection*>::iterator ELFSectionIter; - typedef SetVector<const GlobalValue*>::const_iterator PendingGblsIter; - typedef SetVector<const char *>::const_iterator PendingExtsIter; - typedef std::pair<const Constant *, int64_t> CstExprResTy; - - /// ELFWriter - This class implements the common target-independent code for - /// writing ELF files. Targets should derive a class from this to - /// parameterize the output format. - /// - class ELFWriter : public MachineFunctionPass { - friend class ELFCodeEmitter; - friend class JITDebugRegisterer; - public: - static char ID; - - /// Return the ELFCodeEmitter as an instance of ObjectCodeEmitter - ObjectCodeEmitter *getObjectCodeEmitter() { - return reinterpret_cast<ObjectCodeEmitter*>(ElfCE); - } - - ELFWriter(raw_ostream &O, TargetMachine &TM); - ~ELFWriter(); - - protected: - /// Output stream to send the resultant object file to. - raw_ostream &O; - - /// Target machine description. - TargetMachine &TM; - - /// Context object for machine code objects. - MCContext &OutContext; - - /// Target Elf Writer description. - const TargetELFWriterInfo *TEW; - - /// Mang - The object used to perform name mangling for this module. - Mangler *Mang; - - /// MCE - The MachineCodeEmitter object that we are exposing to emit machine - /// code for functions to the .o file. - ELFCodeEmitter *ElfCE; - - /// TLOF - Target Lowering Object File, provide section names for globals - /// and other object file specific stuff - const TargetLoweringObjectFile &TLOF; - - /// MAI - Target Asm Info, provide information about section names for - /// globals and other target specific stuff. - const MCAsmInfo *MAI; - - //===------------------------------------------------------------------===// - // Properties inferred automatically from the target machine. - //===------------------------------------------------------------------===// - - /// is64Bit/isLittleEndian - This information is inferred from the target - /// machine directly, indicating whether to emit a 32- or 64-bit ELF file. - bool is64Bit, isLittleEndian; - - /// doInitialization - Emit the file header and all of the global variables - /// for the module to the ELF file. - bool doInitialization(Module &M); - bool runOnMachineFunction(MachineFunction &MF); - - /// doFinalization - Now that the module has been completely processed, emit - /// the ELF file to 'O'. - bool doFinalization(Module &M); - - private: - /// Blob containing the Elf header - BinaryObject ElfHdr; - - /// SectionList - This is the list of sections that we have emitted to the - /// file. Once the file has been completely built, the section header table - /// is constructed from this info. - std::vector<ELFSection*> SectionList; - unsigned NumSections; // Always = SectionList.size() - - /// SectionLookup - This is a mapping from section name to section number in - /// the SectionList. Used to quickly gather the Section Index from MAI names - std::map<std::string, ELFSection*> SectionLookup; - - /// PendingGlobals - Globals not processed as symbols yet. - SetVector<const GlobalValue*> PendingGlobals; - - /// GblSymLookup - This is a mapping from global value to a symbol index - /// in the symbol table or private symbols list. This is useful since reloc - /// symbol references must be quickly mapped to their indices on the lists. - std::map<const GlobalValue*, uint32_t> GblSymLookup; - - /// PendingExternals - Externals not processed as symbols yet. - SetVector<const char *> PendingExternals; - - /// ExtSymLookup - This is a mapping from externals to a symbol index - /// in the symbol table list. This is useful since reloc symbol references - /// must be quickly mapped to their symbol table indices. - std::map<const char *, uint32_t> ExtSymLookup; - - /// SymbolList - This is the list of symbols emitted to the symbol table. - /// When the SymbolList is finally built, local symbols must be placed in - /// the beginning while non-locals at the end. - std::vector<ELFSym*> SymbolList; - - /// PrivateSyms - Record private symbols, every symbol here must never be - /// present in the SymbolList. - std::vector<ELFSym*> PrivateSyms; - - /// getSection - Return the section with the specified name, creating a new - /// section if one does not already exist. - ELFSection &getSection(const std::string &Name, unsigned Type, - unsigned Flags = 0, unsigned Align = 0) { - ELFSection *&SN = SectionLookup[Name]; - if (SN) return *SN; - - SectionList.push_back(new ELFSection(Name, isLittleEndian, is64Bit)); - SN = SectionList.back(); - SN->SectionIdx = NumSections++; - SN->Type = Type; - SN->Flags = Flags; - SN->Link = ELF::SHN_UNDEF; - SN->Align = Align; - return *SN; - } - - ELFSection &getNonExecStackSection() { - return getSection(".note.GNU-stack", ELF::SHT_PROGBITS, 0, 1); - } - - ELFSection &getSymbolTableSection() { - return getSection(".symtab", ELF::SHT_SYMTAB, 0); - } - - ELFSection &getStringTableSection() { - return getSection(".strtab", ELF::SHT_STRTAB, 0, 1); - } - - ELFSection &getSectionHeaderStringTableSection() { - return getSection(".shstrtab", ELF::SHT_STRTAB, 0, 1); - } - - ELFSection &getNullSection() { - return getSection("", ELF::SHT_NULL, 0); - } - - ELFSection &getDataSection(); - ELFSection &getBSSSection(); - ELFSection &getCtorSection(); - ELFSection &getDtorSection(); - ELFSection &getJumpTableSection(); - ELFSection &getConstantPoolSection(MachineConstantPoolEntry &CPE); - ELFSection &getTextSection(const Function *F); - ELFSection &getRelocSection(ELFSection &S); - - // Helpers for obtaining ELF specific info. - unsigned getGlobalELFBinding(const GlobalValue *GV); - unsigned getGlobalELFType(const GlobalValue *GV); - unsigned getGlobalELFVisibility(const GlobalValue *GV); - - // AddPendingGlobalSymbol - Add a global to be processed and to - // the global symbol lookup, use a zero index because the table - // index will be determined later. - void AddPendingGlobalSymbol(const GlobalValue *GV, - bool AddToLookup = false); - - // AddPendingExternalSymbol - Add the external to be processed - // and to the external symbol lookup, use a zero index because - // the symbol table index will be determined later. - void AddPendingExternalSymbol(const char *External); - - // AddToSymbolList - Update the symbol lookup and If the symbol is - // private add it to PrivateSyms list, otherwise to SymbolList. - void AddToSymbolList(ELFSym *GblSym); - - // As we complete the ELF file, we need to update fields in the ELF header - // (e.g. the location of the section table). These members keep track of - // the offset in ELFHeader of these various pieces to update and other - // locations in the file. - unsigned ELFHdr_e_shoff_Offset; // e_shoff in ELF header. - unsigned ELFHdr_e_shstrndx_Offset; // e_shstrndx in ELF header. - unsigned ELFHdr_e_shnum_Offset; // e_shnum in ELF header. - - private: - void EmitGlobal(const GlobalValue *GV); - void EmitGlobalConstant(const Constant *C, ELFSection &GblS); - void EmitGlobalConstantStruct(const ConstantStruct *CVS, - ELFSection &GblS); - void EmitGlobalConstantLargeInt(const ConstantInt *CI, ELFSection &S); - void EmitGlobalDataRelocation(const GlobalValue *GV, unsigned Size, - ELFSection &GblS, int64_t Offset = 0); - bool EmitSpecialLLVMGlobal(const GlobalVariable *GV); - void EmitXXStructorList(const Constant *List, ELFSection &Xtor); - void EmitRelocations(); - void EmitRelocation(BinaryObject &RelSec, ELFRelocation &Rel, bool HasRelA); - void EmitSectionHeader(BinaryObject &SHdrTab, const ELFSection &SHdr); - void EmitSectionTableStringTable(); - void EmitSymbol(BinaryObject &SymbolTable, ELFSym &Sym); - void EmitSymbolTable(); - void EmitStringTable(const std::string &ModuleName); - void OutputSectionsAndSectionTable(); - void RelocateField(BinaryObject &BO, uint32_t Offset, int64_t Value, - unsigned Size); - unsigned SortSymbols(); - CstExprResTy ResolveConstantExpr(const Constant *CV); - }; -} - -#endif |
