//
//===----------------------------------------------------------------------===//
+#include "MachO.h"
#include "MachOWriter.h"
#include "MachOCodeEmitter.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
-#include "llvm/CodeGen/FileWriters.h"
-#include "llvm/CodeGen/MachineCodeEmitter.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Target/TargetJITInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachOWriterInfo.h"
#include "llvm/Support/Mangler.h"
-#include "llvm/Support/MathExtras.h"
#include "llvm/Support/OutputBuffer.h"
-#include "llvm/Support/Streams.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include <algorithm>
-#include <cstring>
namespace llvm {
/// AddMachOWriter - Concrete function to add the Mach-O writer to the function
/// pass manager.
-MachineCodeEmitter *AddMachOWriter(PassManagerBase &PM,
+ObjectCodeEmitter *AddMachOWriter(PassManagerBase &PM,
raw_ostream &O,
TargetMachine &TM) {
MachOWriter *MOW = new MachOWriter(O, TM);
PM.add(MOW);
- return &MOW->getMachineCodeEmitter();
+ return MOW->getObjectCodeEmitter();
}
//===----------------------------------------------------------------------===//
TAI = TM.getTargetAsmInfo();
// Create the machine code emitter object for this target.
-
- MCE = new MachOCodeEmitter(*this);
+ MachOCE = new MachOCodeEmitter(*this, *getTextSection(true));
}
MachOWriter::~MachOWriter() {
- delete MCE;
+ delete MachOCE;
}
bool MachOWriter::doInitialization(Module &M) {
/// the Mach-O file to 'O'.
bool MachOWriter::doFinalization(Module &M) {
// FIXME: we don't handle debug info yet, we should probably do that.
-
// Okay, the.text section has been completed, build the .data, .bss, and
// "common" sections next.
+
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
EmitGlobal(I);
return false;
}
+// getConstSection - Get constant section for Constant 'C'
+MachOSection *MachOWriter::getConstSection(Constant *C) {
+ const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
+ if (CVA && CVA->isCString())
+ return getSection("__TEXT", "__cstring",
+ MachOSection::S_CSTRING_LITERALS);
+
+ const Type *Ty = C->getType();
+ if (Ty->isPrimitiveType() || Ty->isInteger()) {
+ unsigned Size = TM.getTargetData()->getTypeAllocSize(Ty);
+ switch(Size) {
+ default: break; // Fall through to __TEXT,__const
+ case 4:
+ return getSection("__TEXT", "__literal4",
+ MachOSection::S_4BYTE_LITERALS);
+ case 8:
+ return getSection("__TEXT", "__literal8",
+ MachOSection::S_8BYTE_LITERALS);
+ case 16:
+ return getSection("__TEXT", "__literal16",
+ MachOSection::S_16BYTE_LITERALS);
+ }
+ }
+ return getSection("__TEXT", "__const");
+}
+
+// getJumpTableSection - Select the Jump Table section
+MachOSection *MachOWriter::getJumpTableSection() {
+ if (TM.getRelocationModel() == Reloc::PIC_)
+ return getTextSection(false);
+ else
+ return getSection("__TEXT", "__const");
+}
+
+// getSection - Return the section with the specified name, creating a new
+// section if one does not already exist.
+MachOSection *MachOWriter::getSection(const std::string &seg,
+ const std::string §,
+ unsigned Flags /* = 0 */ ) {
+ MachOSection *MOS = SectionLookup[seg+sect];
+ if (MOS) return MOS;
+
+ MOS = new MachOSection(seg, sect);
+ SectionList.push_back(MOS);
+ MOS->Index = SectionList.size();
+ MOS->flags = MachOSection::S_REGULAR | Flags;
+ SectionLookup[seg+sect] = MOS;
+ return MOS;
+}
+
+// getTextSection - Return text section with different flags for code/data
+MachOSection *MachOWriter::getTextSection(bool isCode /* = true */ ) {
+ if (isCode)
+ return getSection("__TEXT", "__text",
+ MachOSection::S_ATTR_PURE_INSTRUCTIONS |
+ MachOSection::S_ATTR_SOME_INSTRUCTIONS);
+ else
+ return getSection("__TEXT", "__text");
+}
+
+MachOSection *MachOWriter::getBSSSection() {
+ return getSection("__DATA", "__bss", MachOSection::S_ZEROFILL);
+}
+
+// GetJTRelocation - Get a relocation a new BB relocation based
+// on target information.
+MachineRelocation MachOWriter::GetJTRelocation(unsigned Offset,
+ MachineBasicBlock *MBB) const {
+ return TM.getMachOWriterInfo()->GetJTRelocation(Offset, MBB);
+}
+
+// GetTargetRelocation - Returns the number of relocations.
+unsigned MachOWriter::GetTargetRelocation(MachineRelocation &MR,
+ unsigned FromIdx, unsigned ToAddr,
+ unsigned ToIndex, OutputBuffer &RelocOut,
+ OutputBuffer &SecOut, bool Scattered,
+ bool Extern) {
+ return TM.getMachOWriterInfo()->GetTargetRelocation(MR, FromIdx, ToAddr,
+ ToIndex, RelocOut,
+ SecOut, Scattered,
+ Extern);
+}
+
void MachOWriter::AddSymbolToSection(MachOSection *Sec, GlobalVariable *GV) {
const Type *Ty = GV->getType()->getElementType();
unsigned Size = TM.getTargetData()->getTypeAllocSize(Ty);
// Reserve space in the .bss section for this symbol while maintaining the
// desired section alignment, which must be at least as much as required by
// this symbol.
- OutputBuffer SecDataOut(Sec->SectionData, is64Bit, isLittleEndian);
+ OutputBuffer SecDataOut(Sec->getData(), is64Bit, isLittleEndian);
if (Align) {
- uint64_t OrigSize = Sec->size;
Align = Log2_32(Align);
Sec->align = std::max(unsigned(Sec->align), Align);
- Sec->size = (Sec->size + Align - 1) & ~(Align-1);
- // Add alignment padding to buffer as well.
- // FIXME: remove when we have unified size + output buffer
- unsigned AlignedSize = Sec->size - OrigSize;
- for (unsigned i = 0; i < AlignedSize; ++i)
- SecDataOut.outbyte(0);
+ Sec->emitAlignment(Sec->align);
}
// Globals without external linkage apparently do not go in the symbol table.
if (!GV->hasLocalLinkage()) {
- MachOSym Sym(GV, Mang->getValueName(GV), Sec->Index, TAI);
- Sym.n_value = Sec->size;
+ MachOSym Sym(GV, Mang->getMangledName(GV), Sec->Index, TAI);
+ Sym.n_value = Sec->size();
SymbolTable.push_back(Sym);
}
// Record the offset of the symbol, and then allocate space for it.
// FIXME: remove when we have unified size + output buffer
- Sec->size += Size;
// Now that we know what section the GlovalVariable is going to be emitted
// into, update our mappings.
// FIXME: We may also need to update this when outputting non-GlobalVariable
// GlobalValues such as functions.
+
GVSection[GV] = Sec;
- GVOffset[GV] = Sec->SectionData.size();
+ GVOffset[GV] = Sec->size();
// Allocate space in the section for the global.
for (unsigned i = 0; i < Size; ++i)
// merged with other symbols.
if (NoInit || GV->hasLinkOnceLinkage() || GV->hasWeakLinkage() ||
GV->hasCommonLinkage()) {
- MachOSym ExtOrCommonSym(GV, Mang->getValueName(GV),
+ MachOSym ExtOrCommonSym(GV, Mang->getMangledName(GV),
MachOSym::NO_SECT, TAI);
// For undefined (N_UNDF) external (N_EXT) types, n_value is the size in
// bytes of the symbol.
MachOSection *Sec = GV->isConstant() ? getConstSection(GV->getInitializer()) :
getDataSection();
AddSymbolToSection(Sec, GV);
- InitMem(GV->getInitializer(), &Sec->SectionData[0], GVOffset[GV],
- TM.getTargetData(), Sec->Relocations);
+ InitMem(GV->getInitializer(), GVOffset[GV], TM.getTargetData(), Sec);
}
void MachOWriter::EmitHeaderAndLoadCommands() {
// Step #0: Fill in the segment load command size, since we need it to figure
// out the rest of the header fields
+
MachOSegment SEG("", is64Bit);
SEG.nsects = SectionList.size();
SEG.cmdsize = SEG.cmdSize(is64Bit) +
// Step #3: write the header to the file
// Local alias to shortenify coming code.
- DataBuffer &FH = Header.HeaderData;
+ std::vector<unsigned char> &FH = Header.HeaderData;
OutputBuffer FHOut(FH, is64Bit, isLittleEndian);
FHOut.outword(Header.magic);
// Step #4: Finish filling in the segment load command and write it out
for (std::vector<MachOSection*>::iterator I = SectionList.begin(),
E = SectionList.end(); I != E; ++I)
- SEG.filesize += (*I)->size;
+ SEG.filesize += (*I)->size();
SEG.vmsize = SEG.filesize;
SEG.fileoff = Header.cmdSize(is64Bit) + Header.sizeofcmds;
MachOSection *MOS = *I;
MOS->addr = currentAddr;
MOS->offset = currentAddr + SEG.fileoff;
-
// FIXME: do we need to do something with alignment here?
- currentAddr += MOS->size;
+ currentAddr += MOS->size();
}
// Step #6: Emit the symbol table to temporary buffers, so that we know the
for (std::vector<MachOSection*>::iterator I = SectionList.begin(),
E = SectionList.end(); I != E; ++I) {
MachOSection *MOS = *I;
+
// Convert the relocations to target-specific relocations, and fill in the
// relocation offset for this section.
CalculateRelocations(*MOS);
FHOut.outstring(MOS->sectname, 16);
FHOut.outstring(MOS->segname, 16);
FHOut.outaddr(MOS->addr);
- FHOut.outaddr(MOS->size);
+ FHOut.outaddr(MOS->size());
FHOut.outword(MOS->offset);
FHOut.outword(MOS->align);
FHOut.outword(MOS->reloff);
/// EmitSections - Now that we have constructed the file header and load
/// commands, emit the data for each section to the file.
-
void MachOWriter::EmitSections() {
for (std::vector<MachOSection*>::iterator I = SectionList.begin(),
E = SectionList.end(); I != E; ++I)
// Emit the contents of each section
- O.write((char*)&(*I)->SectionData[0], (*I)->size);
+ if ((*I)->size())
+ O.write((char*)&(*I)->getData()[0], (*I)->size());
}
+
+/// EmitRelocations - emit relocation data from buffer.
void MachOWriter::EmitRelocations() {
for (std::vector<MachOSection*>::iterator I = SectionList.begin(),
E = SectionList.end(); I != E; ++I)
// Emit the relocation entry data for each section.
- O.write((char*)&(*I)->RelocBuffer[0], (*I)->RelocBuffer.size());
+ if ((*I)->RelocBuffer.size())
+ O.write((char*)&(*I)->RelocBuffer[0], (*I)->RelocBuffer.size());
}
/// BufferSymbolAndStringTable - Sort the symbols we encountered and assign them
/// each a string table index so that they appear in the correct order in the
/// output file.
-
void MachOWriter::BufferSymbolAndStringTable() {
// The order of the symbol table is:
// 1. local symbols
// Before sorting the symbols, check the PendingGlobals for any undefined
// globals that need to be put in the symbol table.
-
for (std::vector<GlobalValue*>::iterator I = PendingGlobals.begin(),
E = PendingGlobals.end(); I != E; ++I) {
if (GVOffset[*I] == 0 && GVSection[*I] == 0) {
- MachOSym UndfSym(*I, Mang->getValueName(*I), MachOSym::NO_SECT, TAI);
+ MachOSym UndfSym(*I, Mang->getMangledName(*I), MachOSym::NO_SECT, TAI);
SymbolTable.push_back(UndfSym);
GVOffset[*I] = -1;
}
// Sort the symbols by name, so that when we partition the symbols by scope
// of definition, we won't have to sort by name within each partition.
-
std::sort(SymbolTable.begin(), SymbolTable.end(), MachOSym::SymCmp());
// Parition the symbol table entries so that all local symbols come before
// all symbols with external linkage. { 1 | 2 3 }
-
std::partition(SymbolTable.begin(), SymbolTable.end(),
MachOSym::PartitionByLocal);
// Advance iterator to beginning of external symbols and partition so that
// all external symbols defined in this module come before all external
// symbols defined elsewhere. { 1 | 2 | 3 }
-
for (std::vector<MachOSym>::iterator I = SymbolTable.begin(),
E = SymbolTable.end(); I != E; ++I) {
if (!MachOSym::PartitionByLocal(*I)) {
// Calculate the starting index for each of the local, extern defined, and
// undefined symbols, as well as the number of each to put in the LC_DYSYMTAB
// load command.
-
for (std::vector<MachOSym>::iterator I = SymbolTable.begin(),
E = SymbolTable.end(); I != E; ++I) {
if (MachOSym::PartitionByLocal(*I)) {
// Write out a leading zero byte when emitting string table, for n_strx == 0
// which means an empty string.
-
OutputBuffer StrTOut(StrT, is64Bit, isLittleEndian);
StrTOut.outbyte(0);
// 2. strings for local symbols
// Since this is the opposite order from the symbol table, which we have just
// sorted, we can walk the symbol table backwards to output the string table.
-
for (std::vector<MachOSym>::reverse_iterator I = SymbolTable.rbegin(),
E = SymbolTable.rend(); I != E; ++I) {
if (I->GVName == "") {
/// and the offset into that section. From this information, create the
/// appropriate target-specific MachORelocation type and add buffer it to be
/// written out after we are finished writing out sections.
-
void MachOWriter::CalculateRelocations(MachOSection &MOS) {
- for (unsigned i = 0, e = MOS.Relocations.size(); i != e; ++i) {
- MachineRelocation &MR = MOS.Relocations[i];
+ std::vector<MachineRelocation> Relocations = MOS.getRelocations();
+ for (unsigned i = 0, e = Relocations.size(); i != e; ++i) {
+ MachineRelocation &MR = Relocations[i];
unsigned TargetSection = MR.getConstantVal();
unsigned TargetAddr = 0;
unsigned TargetIndex = 0;
// This is a scattered relocation entry if it points to a global value with
// a non-zero offset.
-
bool Scattered = false;
bool Extern = false;
// Since we may not have seen the GlobalValue we were interested in yet at
// the time we emitted the relocation for it, fix it up now so that it
// points to the offset into the correct section.
-
if (MR.isGlobalValue()) {
GlobalValue *GV = MR.getGlobalValue();
MachOSection *MOSPtr = GVSection[GV];
// If we have never seen the global before, it must be to a symbol
// defined in another module (N_UNDF).
-
if (!MOSPtr) {
// FIXME: need to append stub suffix
Extern = true;
// If the symbol is locally defined, pass in the address of the section and
// the section index to the code which will generate the target relocation.
-
if (!Extern) {
MachOSection &To = *SectionList[TargetSection - 1];
TargetAddr = To.addr;
}
OutputBuffer RelocOut(MOS.RelocBuffer, is64Bit, isLittleEndian);
- OutputBuffer SecOut(MOS.SectionData, is64Bit, isLittleEndian);
+ OutputBuffer SecOut(MOS.getData(), is64Bit, isLittleEndian);
MOS.nreloc += GetTargetRelocation(MR, MOS.Index, TargetAddr, TargetIndex,
RelocOut, SecOut, Scattered, Extern);
// InitMem - Write the value of a Constant to the specified memory location,
// converting it into bytes and relocations.
-
-void MachOWriter::InitMem(const Constant *C, void *Addr, intptr_t Offset,
- const TargetData *TD,
- std::vector<MachineRelocation> &MRs) {
+void MachOWriter::InitMem(const Constant *C, uintptr_t Offset,
+ const TargetData *TD, MachOSection* mos) {
typedef std::pair<const Constant*, intptr_t> CPair;
std::vector<CPair> WorkList;
+ uint8_t *Addr = &mos->getData()[0];
WorkList.push_back(CPair(C,(intptr_t)Addr + Offset));
case Instruction::Add:
default:
cerr << "ConstantExpr not handled as global var init: " << *CE << "\n";
- abort();
- break;
+ llvm_unreachable(0);
}
} else if (PC->getType()->isSingleValueType()) {
unsigned char *ptr = (unsigned char *)PA;
ptr[6] = val >> 48;
ptr[7] = val >> 56;
} else {
- assert(0 && "Not implemented: bit widths > 64");
+ llvm_unreachable("Not implemented: bit widths > 64");
}
break;
}
memset(ptr, 0, TD->getPointerSize());
else if (const GlobalValue* GV = dyn_cast<GlobalValue>(PC)) {
// FIXME: what about function stubs?
- MRs.push_back(MachineRelocation::getGV(PA-(intptr_t)Addr,
+ mos->addRelocation(MachineRelocation::getGV(PA-(intptr_t)Addr,
MachineRelocation::VANILLA,
const_cast<GlobalValue*>(GV),
ScatteredOffset));
ScatteredOffset = 0;
} else
- assert(0 && "Unknown constant pointer type!");
+ llvm_unreachable("Unknown constant pointer type!");
break;
default:
- cerr << "ERROR: Constant unimp for type: " << *PC->getType() << "\n";
- abort();
+ std::string msg;
+ raw_string_ostream Msg(msg);
+ Msg << "ERROR: Constant unimp for type: " << *PC->getType();
+ llvm_report_error(Msg.str());
}
} else if (isa<ConstantAggregateZero>(PC)) {
memset((void*)PA, 0, (size_t)TD->getTypeAllocSize(PC->getType()));
PA+SL->getElementOffset(i)));
} else {
cerr << "Bad Type: " << *PC->getType() << "\n";
- assert(0 && "Unknown constant type to initialize memory with!");
+ llvm_unreachable("Unknown constant type to initialize memory with!");
}
}
}
GV(gv), n_strx(0), n_type(sect == NO_SECT ? N_UNDF : N_SECT), n_sect(sect),
n_desc(0), n_value(0) {
+ // FIXME: This is completely broken, it should use the mangler interface.
switch (GV->getLinkage()) {
default:
- assert(0 && "Unexpected linkage type!");
+ llvm_unreachable("Unexpected linkage type!");
break;
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
case GlobalValue::PrivateLinkage:
GVName = TAI->getPrivateGlobalPrefix() + name;
break;
+ case GlobalValue::LinkerPrivateLinkage:
+ GVName = TAI->getLinkerPrivateGlobalPrefix() + name;
+ break;
case GlobalValue::InternalLinkage:
GVName = TAI->getGlobalPrefix() + name;
break;
}
} // end namespace llvm
-
projects / oota-llvm.git / blobdiff