1 //===-- llvm/MC/WinCOFFObjectWriter.cpp -------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains an implementation of a Win32 COFF object file writer.
12 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "WinCOFFObjectWriter"
16 #include "llvm/MC/MCObjectWriter.h"
17 #include "llvm/MC/MCSection.h"
18 #include "llvm/MC/MCContext.h"
19 #include "llvm/MC/MCSymbol.h"
20 #include "llvm/MC/MCExpr.h"
21 #include "llvm/MC/MCValue.h"
22 #include "llvm/MC/MCAssembler.h"
23 #include "llvm/MC/MCAsmLayout.h"
24 #include "llvm/MC/MCSectionCOFF.h"
26 #include "llvm/ADT/DenseMap.h"
27 #include "llvm/ADT/StringMap.h"
28 #include "llvm/ADT/StringRef.h"
30 #include "llvm/Support/COFF.h"
31 #include "llvm/Support/Debug.h"
32 #include "llvm/Support/ErrorHandling.h"
34 #include "llvm/System/TimeValue.h"
41 typedef llvm::SmallString<COFF::NameSize> name;
52 AuxiliaryType AuxType;
60 typedef llvm::SmallVector<AuxSymbol, 1> AuxiliarySymbols;
67 MCSymbolData const *MCData;
69 COFFSymbol(llvm::StringRef name, size_t index);
71 void set_name_offset(uint32_t Offset);
74 // This class contains staging data for a COFF relocation entry.
75 struct COFFRelocation {
76 COFF::relocation Data;
79 COFFRelocation() : Symb(NULL) {}
80 static size_t size() { return COFF::RelocationSize; }
83 typedef std::vector<COFFRelocation> relocations;
91 MCSectionData const *MCData;
93 relocations Relocations;
95 COFFSection(llvm::StringRef name, size_t Index);
99 // This class holds the COFF string table.
101 typedef llvm::StringMap<size_t> map;
104 void update_length();
106 std::vector<char> Data;
110 size_t insert(llvm::StringRef String);
113 class WinCOFFObjectWriter : public MCObjectWriter {
116 typedef std::vector<COFFSymbol*> symbols;
117 typedef std::vector<COFFSection*> sections;
119 typedef StringMap<COFFSymbol *> name_symbol_map;
120 typedef StringMap<COFFSection *> name_section_map;
122 typedef DenseMap<MCSymbolData const *, COFFSymbol *> symbol_map;
123 typedef DenseMap<MCSectionData const *, COFFSection *> section_map;
125 // Root level file contents.
131 // Maps used during object file creation.
132 section_map SectionMap;
133 symbol_map SymbolMap;
135 WinCOFFObjectWriter(raw_ostream &OS);
136 ~WinCOFFObjectWriter();
138 COFFSymbol *createSymbol(llvm::StringRef Name);
139 COFFSection *createSection(llvm::StringRef Name);
141 void InitCOFFEntity(COFFSymbol &Symbol);
142 void InitCOFFEntity(COFFSection &Section);
144 template <typename object_t, typename list_t>
145 object_t *createCOFFEntity(llvm::StringRef Name, list_t &List);
147 void DefineSection(MCSectionData const &SectionData);
148 void DefineSymbol(MCSymbolData const &SymbolData, MCAssembler &Assembler);
150 bool ExportSection(COFFSection *S);
151 bool ExportSymbol(MCSymbolData const &SymbolData, MCAssembler &Asm);
153 // Entity writing methods.
155 void WriteFileHeader(const COFF::header &Header);
156 void WriteSymbol(const COFFSymbol *S);
157 void WriteAuxiliarySymbols(const COFFSymbol::AuxiliarySymbols &S);
158 void WriteSectionHeader(const COFF::section &S);
159 void WriteRelocation(const COFF::relocation &R);
161 // MCObjectWriter interface implementation.
163 void ExecutePostLayoutBinding(MCAssembler &Asm);
165 void RecordRelocation(const MCAssembler &Asm,
166 const MCAsmLayout &Layout,
167 const MCFragment *Fragment,
168 const MCFixup &Fixup,
170 uint64_t &FixedValue);
172 void WriteObject(const MCAssembler &Asm, const MCAsmLayout &Layout);
176 static inline void write_uint32_le(void *Data, uint32_t const &Value) {
177 uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data);
178 Ptr[0] = (Value & 0x000000FF) >> 0;
179 Ptr[1] = (Value & 0x0000FF00) >> 8;
180 Ptr[2] = (Value & 0x00FF0000) >> 16;
181 Ptr[3] = (Value & 0xFF000000) >> 24;
184 static inline void write_uint16_le(void *Data, uint16_t const &Value) {
185 uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data);
186 Ptr[0] = (Value & 0x00FF) >> 0;
187 Ptr[1] = (Value & 0xFF00) >> 8;
190 static inline void write_uint8_le(void *Data, uint8_t const &Value) {
191 uint8_t *Ptr = reinterpret_cast<uint8_t *>(Data);
192 Ptr[0] = (Value & 0xFF) >> 0;
195 //------------------------------------------------------------------------------
196 // Symbol class implementation
198 COFFSymbol::COFFSymbol(llvm::StringRef name, size_t index)
199 : Name(name.begin(), name.end()), Index(-1)
200 , Other(NULL), MCData(NULL) {
201 memset(&Data, 0, sizeof(Data));
204 size_t COFFSymbol::size() const {
205 return COFF::SymbolSize + (Data.NumberOfAuxSymbols * COFF::SymbolSize);
208 // In the case that the name does not fit within 8 bytes, the offset
209 // into the string table is stored in the last 4 bytes instead, leaving
210 // the first 4 bytes as 0.
211 void COFFSymbol::set_name_offset(uint32_t Offset) {
212 write_uint32_le(Data.Name + 0, 0);
213 write_uint32_le(Data.Name + 4, Offset);
216 //------------------------------------------------------------------------------
217 // Section class implementation
219 COFFSection::COFFSection(llvm::StringRef name, size_t Index)
220 : Name(name), Number(Index + 1)
221 , MCData(NULL), Symb(NULL) {
222 memset(&Header, 0, sizeof(Header));
225 size_t COFFSection::size() {
226 return COFF::SectionSize;
229 //------------------------------------------------------------------------------
230 // StringTable class implementation
232 /// Write the length of the string table into Data.
233 /// The length of the string table includes uint32 length header.
234 void StringTable::update_length() {
235 write_uint32_le(&Data.front(), Data.size());
238 StringTable::StringTable() {
239 // The string table data begins with the length of the entire string table
240 // including the length header. Allocate space for this header.
244 size_t StringTable::size() const {
248 /// Add String to the table iff it is not already there.
249 /// @returns the index into the string table where the string is now located.
250 size_t StringTable::insert(llvm::StringRef String) {
251 map::iterator i = Map.find(String);
256 size_t Offset = Data.size();
258 // Insert string data into string table.
259 Data.insert(Data.end(), String.begin(), String.end());
260 Data.push_back('\0');
262 // Put a reference to it in the map.
263 Map[String] = Offset;
265 // Update the internal length field.
271 //------------------------------------------------------------------------------
272 // WinCOFFObjectWriter class implementation
274 WinCOFFObjectWriter::WinCOFFObjectWriter(raw_ostream &OS)
275 : MCObjectWriter(OS, true) {
276 memset(&Header, 0, sizeof(Header));
277 // TODO: Move magic constant out to COFF.h
278 Header.Machine = 0x14C; // x86
281 WinCOFFObjectWriter::~WinCOFFObjectWriter() {
282 for (symbols::iterator I = Symbols.begin(), E = Symbols.end(); I != E; ++I)
284 for (sections::iterator I = Sections.begin(), E = Sections.end(); I != E; ++I)
288 COFFSymbol *WinCOFFObjectWriter::createSymbol(llvm::StringRef Name) {
289 return createCOFFEntity<COFFSymbol>(Name, Symbols);
292 COFFSection *WinCOFFObjectWriter::createSection(llvm::StringRef Name) {
293 return createCOFFEntity<COFFSection>(Name, Sections);
296 /// This function initializes a symbol by entering its name into the string
297 /// table if it is too long to fit in the symbol table header.
298 void WinCOFFObjectWriter::InitCOFFEntity(COFFSymbol &S) {
299 if (S.Name.size() > COFF::NameSize) {
300 size_t StringTableEntry = Strings.insert(S.Name.c_str());
302 S.set_name_offset(StringTableEntry);
304 memcpy(S.Data.Name, S.Name.c_str(), S.Name.size());
307 /// This function initializes a section by entering its name into the string
308 /// table if it is too long to fit in the section table header.
309 void WinCOFFObjectWriter::InitCOFFEntity(COFFSection &S) {
310 if (S.Name.size() > COFF::NameSize) {
311 size_t StringTableEntry = Strings.insert(S.Name.c_str());
313 // FIXME: Why is this number 999999? This number is never mentioned in the
314 // spec. I'm assuming this is due to the printed value needing to fit into
315 // the S.Header.Name field. In which case why not 9999999 (7 9's instead of
316 // 6)? The spec does not state if this entry should be null terminated in
317 // this case, and thus this seems to be the best way to do it. I think I
318 // just solved my own FIXME...
319 if (StringTableEntry > 999999)
320 report_fatal_error("COFF string table is greater than 999999 bytes.");
322 sprintf(S.Header.Name, "/%d", (unsigned)StringTableEntry);
324 memcpy(S.Header.Name, S.Name.c_str(), S.Name.size());
327 /// A template used to lookup or create a symbol/section, and initialize it if
329 template <typename object_t, typename list_t>
330 object_t *WinCOFFObjectWriter::createCOFFEntity(llvm::StringRef Name,
332 object_t *Object = new object_t(Name, List.size());
334 InitCOFFEntity(*Object);
336 List.push_back(Object);
341 /// This function takes a section data object from the assembler
342 /// and creates the associated COFF section staging object.
343 void WinCOFFObjectWriter::DefineSection(MCSectionData const &SectionData) {
344 // FIXME: Not sure how to verify this (at least in a debug build).
345 MCSectionCOFF const &Sec =
346 static_cast<MCSectionCOFF const &>(SectionData.getSection());
348 COFFSection *coff_section = createSection(Sec.getSectionName());
349 COFFSymbol *coff_symbol = createSymbol(Sec.getSectionName());
351 coff_section->Symb = coff_symbol;
352 coff_symbol->Data.StorageClass = COFF::IMAGE_SYM_CLASS_STATIC;
353 coff_symbol->Data.SectionNumber = coff_section->Number;
355 // In this case the auxiliary symbol is a Section Definition.
356 coff_symbol->Aux.resize(1);
357 memset(&coff_symbol->Aux[0], 0, sizeof(coff_symbol->Aux[0]));
358 coff_symbol->Aux[0].AuxType = ATSectionDefinition;
359 coff_symbol->Aux[0].Aux.SectionDefinition.Number = coff_section->Number;
360 coff_symbol->Aux[0].Aux.SectionDefinition.Selection = Sec.getSelection();
362 coff_section->Header.Characteristics = Sec.getCharacteristics();
364 uint32_t &Characteristics = coff_section->Header.Characteristics;
365 switch (SectionData.getAlignment()) {
366 case 1: Characteristics |= COFF::IMAGE_SCN_ALIGN_1BYTES; break;
367 case 2: Characteristics |= COFF::IMAGE_SCN_ALIGN_2BYTES; break;
368 case 4: Characteristics |= COFF::IMAGE_SCN_ALIGN_4BYTES; break;
369 case 8: Characteristics |= COFF::IMAGE_SCN_ALIGN_8BYTES; break;
370 case 16: Characteristics |= COFF::IMAGE_SCN_ALIGN_16BYTES; break;
371 case 32: Characteristics |= COFF::IMAGE_SCN_ALIGN_32BYTES; break;
372 case 64: Characteristics |= COFF::IMAGE_SCN_ALIGN_64BYTES; break;
373 case 128: Characteristics |= COFF::IMAGE_SCN_ALIGN_128BYTES; break;
374 case 256: Characteristics |= COFF::IMAGE_SCN_ALIGN_256BYTES; break;
375 case 512: Characteristics |= COFF::IMAGE_SCN_ALIGN_512BYTES; break;
376 case 1024: Characteristics |= COFF::IMAGE_SCN_ALIGN_1024BYTES; break;
377 case 2048: Characteristics |= COFF::IMAGE_SCN_ALIGN_2048BYTES; break;
378 case 4096: Characteristics |= COFF::IMAGE_SCN_ALIGN_4096BYTES; break;
379 case 8192: Characteristics |= COFF::IMAGE_SCN_ALIGN_8192BYTES; break;
381 llvm_unreachable("unsupported section alignment");
384 // Bind internal COFF section to MC section.
385 coff_section->MCData = &SectionData;
386 SectionMap[&SectionData] = coff_section;
389 /// This function takes a section data object from the assembler
390 /// and creates the associated COFF symbol staging object.
391 void WinCOFFObjectWriter::DefineSymbol(MCSymbolData const &SymbolData,
392 MCAssembler &Assembler) {
393 COFFSymbol *coff_symbol = createSymbol(SymbolData.getSymbol().getName());
395 coff_symbol->Data.Type = (SymbolData.getFlags() & 0x0000FFFF) >> 0;
396 coff_symbol->Data.StorageClass = (SymbolData.getFlags() & 0x00FF0000) >> 16;
398 // If no storage class was specified in the streamer, define it here.
399 if (coff_symbol->Data.StorageClass == 0) {
400 bool external = SymbolData.isExternal() || (SymbolData.Fragment == NULL);
402 coff_symbol->Data.StorageClass =
403 external ? COFF::IMAGE_SYM_CLASS_EXTERNAL : COFF::IMAGE_SYM_CLASS_STATIC;
406 if (SymbolData.getFlags() & COFF::SF_WeakReference) {
407 coff_symbol->Data.StorageClass = COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL;
409 const MCExpr *Value = SymbolData.getSymbol().getVariableValue();
411 // FIXME: This assert message isn't very good.
412 assert(Value->getKind() == MCExpr::SymbolRef &&
413 "Value must be a SymbolRef!");
415 const MCSymbolRefExpr *SymbolRef =
416 static_cast<const MCSymbolRefExpr *>(Value);
418 const MCSymbolData &OtherSymbolData =
419 Assembler.getSymbolData(SymbolRef->getSymbol());
421 // FIXME: This assert message isn't very good.
422 assert(SymbolMap.find(&OtherSymbolData) != SymbolMap.end() &&
423 "OtherSymbolData must be in the symbol map!");
425 coff_symbol->Other = SymbolMap[&OtherSymbolData];
427 // Setup the Weak External auxiliary symbol.
428 coff_symbol->Aux.resize(1);
429 memset(&coff_symbol->Aux[0], 0, sizeof(coff_symbol->Aux[0]));
430 coff_symbol->Aux[0].AuxType = ATWeakExternal;
431 coff_symbol->Aux[0].Aux.WeakExternal.TagIndex = 0;
432 coff_symbol->Aux[0].Aux.WeakExternal.Characteristics =
433 COFF::IMAGE_WEAK_EXTERN_SEARCH_LIBRARY;
436 // Bind internal COFF symbol to MC symbol.
437 coff_symbol->MCData = &SymbolData;
438 SymbolMap[&SymbolData] = coff_symbol;
441 bool WinCOFFObjectWriter::ExportSection(COFFSection *S) {
442 return (S->Header.Characteristics
443 & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) == 0;
446 bool WinCOFFObjectWriter::ExportSymbol(MCSymbolData const &SymbolData,
448 // This doesn't seem to be right. Strings referred to from the .data section
449 // need symbols so they can be linked to code in the .text section right?
451 // return Asm.isSymbolLinkerVisible (&SymbolData);
453 // For now, all symbols are exported, the linker will sort it out for us.
457 //------------------------------------------------------------------------------
458 // entity writing methods
460 void WinCOFFObjectWriter::WriteFileHeader(const COFF::header &Header) {
461 WriteLE16(Header.Machine);
462 WriteLE16(Header.NumberOfSections);
463 WriteLE32(Header.TimeDateStamp);
464 WriteLE32(Header.PointerToSymbolTable);
465 WriteLE32(Header.NumberOfSymbols);
466 WriteLE16(Header.SizeOfOptionalHeader);
467 WriteLE16(Header.Characteristics);
470 void WinCOFFObjectWriter::WriteSymbol(const COFFSymbol *S) {
471 WriteBytes(StringRef(S->Data.Name, COFF::NameSize));
472 WriteLE32(S->Data.Value);
473 WriteLE16(S->Data.SectionNumber);
474 WriteLE16(S->Data.Type);
475 Write8(S->Data.StorageClass);
476 Write8(S->Data.NumberOfAuxSymbols);
477 WriteAuxiliarySymbols(S->Aux);
480 void WinCOFFObjectWriter::WriteAuxiliarySymbols(
481 const COFFSymbol::AuxiliarySymbols &S) {
482 for(COFFSymbol::AuxiliarySymbols::const_iterator i = S.begin(), e = S.end();
485 case ATFunctionDefinition:
486 WriteLE32(i->Aux.FunctionDefinition.TagIndex);
487 WriteLE32(i->Aux.FunctionDefinition.TotalSize);
488 WriteLE32(i->Aux.FunctionDefinition.PointerToLinenumber);
489 WriteLE32(i->Aux.FunctionDefinition.PointerToNextFunction);
490 WriteZeros(sizeof(i->Aux.FunctionDefinition.unused));
492 case ATbfAndefSymbol:
493 WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused1));
494 WriteLE16(i->Aux.bfAndefSymbol.Linenumber);
495 WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused2));
496 WriteLE32(i->Aux.bfAndefSymbol.PointerToNextFunction);
497 WriteZeros(sizeof(i->Aux.bfAndefSymbol.unused3));
500 WriteLE32(i->Aux.WeakExternal.TagIndex);
501 WriteLE32(i->Aux.WeakExternal.Characteristics);
502 WriteZeros(sizeof(i->Aux.WeakExternal.unused));
505 WriteBytes(StringRef(reinterpret_cast<const char *>(i->Aux.File.FileName),
506 sizeof(i->Aux.File.FileName)));
508 case ATSectionDefinition:
509 WriteLE32(i->Aux.SectionDefinition.Length);
510 WriteLE16(i->Aux.SectionDefinition.NumberOfRelocations);
511 WriteLE16(i->Aux.SectionDefinition.NumberOfLinenumbers);
512 WriteLE32(i->Aux.SectionDefinition.CheckSum);
513 WriteLE16(i->Aux.SectionDefinition.Number);
514 Write8(i->Aux.SectionDefinition.Selection);
515 WriteZeros(sizeof(i->Aux.SectionDefinition.unused));
521 void WinCOFFObjectWriter::WriteSectionHeader(const COFF::section &S) {
522 WriteBytes(StringRef(S.Name, COFF::NameSize));
524 WriteLE32(S.VirtualSize);
525 WriteLE32(S.VirtualAddress);
526 WriteLE32(S.SizeOfRawData);
527 WriteLE32(S.PointerToRawData);
528 WriteLE32(S.PointerToRelocations);
529 WriteLE32(S.PointerToLineNumbers);
530 WriteLE16(S.NumberOfRelocations);
531 WriteLE16(S.NumberOfLineNumbers);
532 WriteLE32(S.Characteristics);
535 void WinCOFFObjectWriter::WriteRelocation(const COFF::relocation &R) {
536 WriteLE32(R.VirtualAddress);
537 WriteLE32(R.SymbolTableIndex);
541 ////////////////////////////////////////////////////////////////////////////////
542 // MCObjectWriter interface implementations
544 void WinCOFFObjectWriter::ExecutePostLayoutBinding(MCAssembler &Asm) {
545 // "Define" each section & symbol. This creates section & symbol
546 // entries in the staging area and gives them their final indexes.
548 for (MCAssembler::const_iterator i = Asm.begin(), e = Asm.end(); i != e; i++)
551 for (MCAssembler::const_symbol_iterator i = Asm.symbol_begin(),
552 e = Asm.symbol_end(); i != e; i++) {
553 if (ExportSymbol(*i, Asm))
554 DefineSymbol(*i, Asm);
558 void WinCOFFObjectWriter::RecordRelocation(const MCAssembler &Asm,
559 const MCAsmLayout &Layout,
560 const MCFragment *Fragment,
561 const MCFixup &Fixup,
563 uint64_t &FixedValue) {
564 assert(Target.getSymA() != NULL && "Relocation must reference a symbol!");
565 assert(Target.getSymB() == NULL &&
566 "Relocation must reference only one symbol!");
568 MCSectionData const *SectionData = Fragment->getParent();
569 MCSymbolData const *SymbolData =
570 &Asm.getSymbolData(Target.getSymA()->getSymbol());
572 assert(SectionMap.find(SectionData) != SectionMap.end() &&
573 "Section must already have been defined in ExecutePostLayoutBinding!");
574 assert(SymbolMap.find(SymbolData) != SymbolMap.end() &&
575 "Symbol must already have been defined in ExecutePostLayoutBinding!");
577 COFFSection *coff_section = SectionMap[SectionData];
578 COFFSymbol *coff_symbol = SymbolMap[SymbolData];
580 FixedValue = Target.getConstant();
582 COFFRelocation Reloc;
584 Reloc.Data.SymbolTableIndex = 0;
585 Reloc.Data.VirtualAddress = Layout.getFragmentOffset(Fragment);
586 Reloc.Symb = coff_symbol;
588 Reloc.Data.VirtualAddress += Fixup.getOffset();
590 switch (Fixup.getKind()) {
591 case FirstTargetFixupKind: // reloc_pcrel_4byte
592 Reloc.Data.Type = COFF::IMAGE_REL_I386_REL32;
596 Reloc.Data.Type = COFF::IMAGE_REL_I386_DIR32;
599 llvm_unreachable("unsupported relocation type");
602 coff_section->Relocations.push_back(Reloc);
605 void WinCOFFObjectWriter::WriteObject(const MCAssembler &Asm,
606 const MCAsmLayout &Layout) {
607 // Assign symbol and section indexes and offsets.
609 Header.NumberOfSymbols = 0;
611 for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) {
612 COFFSymbol *coff_symbol = *i;
613 MCSymbolData const *SymbolData = coff_symbol->MCData;
615 coff_symbol->Index = Header.NumberOfSymbols++;
617 // Update section number & offset for symbols that have them.
618 if ((SymbolData != NULL) && (SymbolData->Fragment != NULL)) {
619 COFFSection *coff_section = SectionMap[SymbolData->Fragment->getParent()];
621 coff_symbol->Data.SectionNumber = coff_section->Number;
622 coff_symbol->Data.Value = Layout.getFragmentOffset(SymbolData->Fragment);
625 // Update auxiliary symbol info.
626 coff_symbol->Data.NumberOfAuxSymbols = coff_symbol->Aux.size();
627 Header.NumberOfSymbols += coff_symbol->Data.NumberOfAuxSymbols;
630 // Fixup weak external references.
631 for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++) {
632 COFFSymbol *symb = *i;
634 if (symb->Other != NULL) {
635 assert(symb->Aux.size() == 1 &&
636 "Symbol must contain one aux symbol!");
637 assert(symb->Aux[0].AuxType == ATWeakExternal &&
638 "Symbol's aux symbol must be a Weak External!");
639 symb->Aux[0].Aux.WeakExternal.TagIndex = symb->Other->Index;
643 // Assign file offsets to COFF object file structures.
647 offset += COFF::HeaderSize;
648 offset += COFF::SectionSize * Asm.size();
650 Header.NumberOfSections = Sections.size();
652 for (MCAssembler::const_iterator i = Asm.begin(),
655 COFFSection *Sec = SectionMap[i];
657 Sec->Header.SizeOfRawData = Layout.getSectionFileSize(i);
659 if (ExportSection(Sec)) {
660 Sec->Header.PointerToRawData = offset;
662 offset += Sec->Header.SizeOfRawData;
665 if (Sec->Relocations.size() > 0) {
666 Sec->Header.NumberOfRelocations = Sec->Relocations.size();
667 Sec->Header.PointerToRelocations = offset;
669 offset += COFF::RelocationSize * Sec->Relocations.size();
671 for (relocations::iterator cr = Sec->Relocations.begin(),
672 er = Sec->Relocations.end();
674 (*cr).Data.SymbolTableIndex = (*cr).Symb->Index;
678 assert(Sec->Symb->Aux.size() == 1 && "Section's symbol must have one aux!");
679 AuxSymbol &Aux = Sec->Symb->Aux[0];
680 assert(Aux.AuxType == ATSectionDefinition &&
681 "Section's symbol's aux symbol must be a Section Definition!");
682 Aux.Aux.SectionDefinition.Length = Sec->Header.SizeOfRawData;
683 Aux.Aux.SectionDefinition.NumberOfRelocations =
684 Sec->Header.NumberOfRelocations;
685 Aux.Aux.SectionDefinition.NumberOfLinenumbers =
686 Sec->Header.NumberOfLineNumbers;
689 Header.PointerToSymbolTable = offset;
691 Header.TimeDateStamp = sys::TimeValue::now().toEpochTime();
693 // Write it all to disk...
694 WriteFileHeader(Header);
697 sections::iterator i, ie;
698 MCAssembler::const_iterator j, je;
700 for (i = Sections.begin(), ie = Sections.end(); i != ie; i++)
701 WriteSectionHeader((*i)->Header);
703 for (i = Sections.begin(), ie = Sections.end(),
704 j = Asm.begin(), je = Asm.end();
705 (i != ie) && (j != je); i++, j++) {
706 if ((*i)->Header.PointerToRawData != 0) {
707 assert(OS.tell() == (*i)->Header.PointerToRawData &&
708 "Section::PointerToRawData is insane!");
710 Asm.WriteSectionData(j, Layout, this);
713 if ((*i)->Relocations.size() > 0) {
714 assert(OS.tell() == (*i)->Header.PointerToRelocations &&
715 "Section::PointerToRelocations is insane!");
717 for (relocations::const_iterator k = (*i)->Relocations.begin(),
718 ke = (*i)->Relocations.end();
720 WriteRelocation(k->Data);
723 assert((*i)->Header.PointerToRelocations == 0 &&
724 "Section::PointerToRelocations is insane!");
728 assert(OS.tell() == Header.PointerToSymbolTable &&
729 "Header::PointerToSymbolTable is insane!");
731 for (symbols::iterator i = Symbols.begin(), e = Symbols.end(); i != e; i++)
734 OS.write((char const *)&Strings.Data.front(), Strings.Data.size());
737 //------------------------------------------------------------------------------
738 // WinCOFFObjectWriter factory function
741 MCObjectWriter *createWinCOFFObjectWriter(raw_ostream &OS) {
742 return new WinCOFFObjectWriter(OS);