#include "llvm/ADT/SetVector.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/Support/OutputBuffer.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetELFWriterInfo.h"
-#include "ELF.h"
-#include <list>
#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;
+
+ 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
///
class ELFWriter : public MachineFunctionPass {
friend class ELFCodeEmitter;
+ friend class JITDebugRegisterer;
public:
static char ID;
- MachineCodeEmitter &getMachineCodeEmitter() const {
- return *(MachineCodeEmitter*)MCE;
+ /// Return the ELFCodeEmitter as an instance of ObjectCodeEmitter
+ ObjectCodeEmitter *getObjectCodeEmitter() {
+ return reinterpret_cast<ObjectCodeEmitter*>(ElfCE);
}
ELFWriter(raw_ostream &O, TargetMachine &TM);
~ELFWriter();
- typedef std::vector<unsigned char> DataBuffer;
-
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;
/// MCE - The MachineCodeEmitter object that we are exposing to emit machine
/// code for functions to the .o file.
- ELFCodeEmitter *MCE;
+ ELFCodeEmitter *ElfCE;
+
+ /// TLOF - Target Lowering Object File, provide section names for globals
+ /// and other object file specific stuff
+ const TargetLoweringObjectFile &TLOF;
- /// TAI - Target Asm Info, provide information about section names for
+ /// MAI - Target Asm Info, provide information about section names for
/// globals and other target specific stuff.
- const TargetAsmInfo *TAI;
+ const MCAsmInfo *MAI;
//===------------------------------------------------------------------===//
// Properties inferred automatically from the target machine.
bool doFinalization(Module &M);
private:
- // Blob containing the Elf header
+ /// 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
+ /// file. Once the file has been completely built, the section header table
/// is constructed from this info.
- std::list<ELFSection> SectionList;
+ std::vector<ELFSection*> SectionList;
unsigned NumSections; // Always = SectionList.size()
/// SectionLookup - This is a mapping from section name to section number in
- /// the SectionList.
+ /// 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,
+ 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(ELFSection(Name, isLittleEndian, is64Bit));
- SN = &SectionList.back();
+ SectionList.push_back(new ELFSection(Name, isLittleEndian, is64Bit));
+ SN = SectionList.back();
SN->SectionIdx = NumSections++;
SN->Type = Type;
SN->Flags = Flags;
return *SN;
}
- ELFSection &getTextSection() {
- return getSection(".text", ELFSection::SHT_PROGBITS,
- ELFSection::SHF_EXECINSTR | ELFSection::SHF_ALLOC);
- }
-
ELFSection &getNonExecStackSection() {
return getSection(".note.GNU-stack", ELFSection::SHT_PROGBITS, 0, 1);
}
return getSection(".strtab", ELFSection::SHT_STRTAB, 0, 1);
}
- ELFSection &getDataSection() {
- return getSection(".data", ELFSection::SHT_PROGBITS,
- ELFSection::SHF_WRITE | ELFSection::SHF_ALLOC);
+ ELFSection &getSectionHeaderStringTableSection() {
+ return getSection(".shstrtab", ELFSection::SHT_STRTAB, 0, 1);
}
- ELFSection &getBSSSection() {
- return getSection(".bss", ELFSection::SHT_NOBITS,
- ELFSection::SHF_WRITE | ELFSection::SHF_ALLOC);
+ ELFSection &getNullSection() {
+ return getSection("", ELFSection::SHT_NULL, 0);
}
- /// SymbolList - This is the list of symbols we have emitted to the file.
- /// This actually gets rearranged before emission to the file (to put the
- /// local symbols first in the list).
- std::vector<ELFSym> SymbolList;
-
- /// PendingGlobals - List of externally defined symbols that we have been
- /// asked to emit, but have not seen a reference to. When a reference
- /// is seen, the symbol will move from this list to the SymbolList.
- SetVector<GlobalValue*> PendingGlobals;
+ ELFSection &getDataSection();
+ ELFSection &getBSSSection();
+ ELFSection &getCtorSection();
+ ELFSection &getDtorSection();
+ ELFSection &getJumpTableSection();
+ ELFSection &getConstantPoolSection(MachineConstantPoolEntry &CPE);
+ ELFSection &getTextSection(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
unsigned ELFHdr_e_shnum_Offset; // e_shnum in ELF header.
private:
- void EmitGlobal(GlobalVariable *GV);
+ 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(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);
};
}