#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
//===----------------------------------------------------------------------===//
ELFWriter::ELFWriter(raw_ostream &o, TargetMachine &tm)
- : MachineFunctionPass(&ID), O(o), TM(tm),
- OutContext(*new MCContext(*TM.getMCAsmInfo())),
+ : MachineFunctionPass(ID), O(o), TM(tm),
+ OutContext(*new MCContext(*TM.getMCAsmInfo(), *TM.getRegisterInfo(),
+ &TM.getTargetLowering()->getObjFileLowering())),
TLOF(TM.getTargetLowering()->getObjFileLowering()),
is64Bit(TM.getTargetData()->getPointerSizeInBits() == 64),
isLittleEndian(TM.getTargetData()->isLittleEndian()),
// Create the object code emitter object for this target.
ElfCE = new ELFCodeEmitter(*this);
- // Inital number of sections
+ // Initial number of sections
NumSections = 0;
}
ElfHdr.emitByte(TEW->getEIClass()); // e_ident[EI_CLASS]
ElfHdr.emitByte(TEW->getEIData()); // e_ident[EI_DATA]
- ElfHdr.emitByte(EV_CURRENT); // e_ident[EI_VERSION]
+ ElfHdr.emitByte(ELF::EV_CURRENT); // e_ident[EI_VERSION]
ElfHdr.emitAlignment(16); // e_ident[EI_NIDENT-EI_PAD]
- ElfHdr.emitWord16(ET_REL); // e_type
+ ElfHdr.emitWord16(ELF::ET_REL); // e_type
ElfHdr.emitWord16(TEW->getEMachine()); // e_machine = target
- ElfHdr.emitWord32(EV_CURRENT); // e_version
+ ElfHdr.emitWord32(ELF::EV_CURRENT); // e_version
ElfHdr.emitWord(0); // e_entry, no entry point in .o file
ElfHdr.emitWord(0); // e_phoff, no program header for .o
ELFHdr_e_shoff_Offset = ElfHdr.size();
}
// getTextSection - Get the text section for the specified function
-ELFSection &ELFWriter::getTextSection(Function *F) {
+ELFSection &ELFWriter::getTextSection(const Function *F) {
const MCSectionELF *Text =
(const MCSectionELF *)TLOF.SectionForGlobal(F, Mang, TM);
return getSection(Text->getSectionName(), Text->getType(), Text->getFlags());
// is true if the relocation section contains entries with addends.
ELFSection &ELFWriter::getRelocSection(ELFSection &S) {
unsigned SectionType = TEW->hasRelocationAddend() ?
- ELFSection::SHT_RELA : ELFSection::SHT_REL;
+ ELF::SHT_RELA : ELF::SHT_REL;
std::string SectionName(".rel");
if (TEW->hasRelocationAddend())
default:
llvm_unreachable("unknown visibility type");
case GlobalValue::DefaultVisibility:
- return ELFSym::STV_DEFAULT;
+ return ELF::STV_DEFAULT;
case GlobalValue::HiddenVisibility:
- return ELFSym::STV_HIDDEN;
+ return ELF::STV_HIDDEN;
case GlobalValue::ProtectedVisibility:
- return ELFSym::STV_PROTECTED;
+ return ELF::STV_PROTECTED;
}
return 0;
}
// getGlobalELFBinding - Returns the ELF specific binding type
unsigned ELFWriter::getGlobalELFBinding(const GlobalValue *GV) {
if (GV->hasInternalLinkage())
- return ELFSym::STB_LOCAL;
+ return ELF::STB_LOCAL;
if (GV->isWeakForLinker() && !GV->hasCommonLinkage())
- return ELFSym::STB_WEAK;
+ return ELF::STB_WEAK;
- return ELFSym::STB_GLOBAL;
+ return ELF::STB_GLOBAL;
}
// getGlobalELFType - Returns the ELF specific type for a global
unsigned ELFWriter::getGlobalELFType(const GlobalValue *GV) {
if (GV->isDeclaration())
- return ELFSym::STT_NOTYPE;
+ return ELF::STT_NOTYPE;
if (isa<Function>(GV))
- return ELFSym::STT_FUNC;
+ return ELF::STT_FUNC;
- return ELFSym::STT_OBJECT;
+ return ELF::STT_OBJECT;
}
// IsELFUndefSym - True if the global value must be marked as a symbol
}
}
+/// HasCommonSymbols - True if this section holds common symbols, this is
+/// indicated on the ELF object file by a symbol with SHN_COMMON section
+/// header index.
+static bool HasCommonSymbols(const MCSectionELF &S) {
+ // FIXME: this is wrong, a common symbol can be in .data for example.
+ if (StringRef(S.getSectionName()).startswith(".gnu.linkonce."))
+ return true;
+
+ return false;
+}
+
+
// EmitGlobal - Choose the right section for global and emit it
void ELFWriter::EmitGlobal(const GlobalValue *GV) {
unsigned Size = TD->getTypeAllocSize(GVar->getInitializer()->getType());
GblSym->Size = Size;
- if (S->HasCommonSymbols()) { // Symbol must go to a common section
- GblSym->SectionIdx = ELFSection::SHN_COMMON;
+ if (HasCommonSymbols(*S)) { // Symbol must go to a common section
+ GblSym->SectionIdx = ELF::SHN_COMMON;
// A new linkonce section is created for each global in the
// common section, the default alignment is 1 and the symbol
EmitGlobalConstantLargeInt(CI, GblS);
return;
} else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
- const VectorType *PTy = CP->getType();
+ VectorType *PTy = CP->getType();
for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
EmitGlobalConstant(CP->getOperand(I), GblS);
return;
case Instruction::GetElementPtr: {
const Constant *ptrVal = CE->getOperand(0);
SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
- int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
- idxVec.size());
+ int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), idxVec);
return std::make_pair(ptrVal, Offset);
}
case Instruction::IntToPtr: {
}
case Instruction::PtrToInt: {
Constant *Op = CE->getOperand(0);
- const Type *Ty = CE->getType();
+ Type *Ty = CE->getType();
// We can emit the pointer value into this slot if the slot is an
// integer slot greater or equal to the size of the pointer.
}
}
- std::string msg(CE->getOpcodeName());
- raw_string_ostream ErrorMsg(msg);
- ErrorMsg << ": Unsupported ConstantExpr type";
- report_fatal_error(ErrorMsg.str());
+ report_fatal_error(CE->getOpcodeName() +
+ StringRef(": Unsupported ConstantExpr type"));
return std::make_pair(CV, 0); // silence warning
}
/// EmitXXStructorList - Emit the ctor or dtor list. This just emits out the
/// function pointers, ignoring the init priority.
-void ELFWriter::EmitXXStructorList(Constant *List, ELFSection &Xtor) {
- // Should be an array of '{ int, void ()* }' structs. The first value is the
+void ELFWriter::EmitXXStructorList(const Constant *List, ELFSection &Xtor) {
+ // Should be an array of '{ i32, void ()* }' structs. The first value is the
// init priority, which we ignore.
- if (!isa<ConstantArray>(List)) return;
- ConstantArray *InitList = cast<ConstantArray>(List);
- for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
- if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
- if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
-
- if (CS->getOperand(1)->isNullValue())
- return; // Found a null terminator, exit printing.
- // Emit the function pointer.
- EmitGlobalConstant(CS->getOperand(1), Xtor);
- }
+ if (List->isNullValue()) return;
+ const ConstantArray *InitList = cast<ConstantArray>(List);
+ for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
+ if (InitList->getOperand(i)->isNullValue())
+ continue;
+ ConstantStruct *CS = cast<ConstantStruct>(InitList->getOperand(i));
+
+ if (CS->getOperand(1)->isNullValue())
+ continue;
+
+ // Emit the function pointer.
+ EmitGlobalConstant(CS->getOperand(1), Xtor);
+ }
}
bool ELFWriter::runOnMachineFunction(MachineFunction &MF) {
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