1 //===- lib/MC/MCAssembler.cpp - Assembler Backend Implementation ----------===//
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 #define DEBUG_TYPE "assembler"
11 #include "llvm/MC/MCAssembler.h"
12 #include "llvm/MC/MCAsmLayout.h"
13 #include "llvm/MC/MCCodeEmitter.h"
14 #include "llvm/MC/MCExpr.h"
15 #include "llvm/MC/MCObjectWriter.h"
16 #include "llvm/MC/MCSymbol.h"
17 #include "llvm/MC/MCValue.h"
18 #include "llvm/ADT/OwningPtr.h"
19 #include "llvm/ADT/Statistic.h"
20 #include "llvm/ADT/StringExtras.h"
21 #include "llvm/ADT/Twine.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/raw_ostream.h"
24 #include "llvm/Support/Debug.h"
25 #include "llvm/Target/TargetRegistry.h"
26 #include "llvm/Target/TargetAsmBackend.h"
29 #include "../Target/X86/X86FixupKinds.h"
34 STATISTIC(EmittedFragments, "Number of emitted assembler fragments");
36 // FIXME FIXME FIXME: There are number of places in this file where we convert
37 // what is a 64-bit assembler value used for computation into a value in the
38 // object file, which may truncate it. We should detect that truncation where
39 // invalid and report errors back.
43 MCFragment::MCFragment() : Kind(FragmentType(~0)) {
46 MCFragment::MCFragment(FragmentType _Kind, MCSectionData *_Parent)
49 FileSize(~UINT64_C(0))
52 Parent->getFragmentList().push_back(this);
55 MCFragment::~MCFragment() {
58 uint64_t MCFragment::getAddress() const {
59 assert(getParent() && "Missing Section!");
60 return getParent()->getAddress() + Offset;
65 MCSectionData::MCSectionData() : Section(0) {}
67 MCSectionData::MCSectionData(const MCSection &_Section, MCAssembler *A)
70 Address(~UINT64_C(0)),
72 FileSize(~UINT64_C(0)),
73 HasInstructions(false)
76 A->getSectionList().push_back(this);
81 MCSymbolData::MCSymbolData() : Symbol(0) {}
83 MCSymbolData::MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment,
84 uint64_t _Offset, MCAssembler *A)
85 : Symbol(&_Symbol), Fragment(_Fragment), Offset(_Offset),
86 IsExternal(false), IsPrivateExtern(false),
87 CommonSize(0), CommonAlign(0), Flags(0), Index(0)
90 A->getSymbolList().push_back(this);
95 MCAssembler::MCAssembler(MCContext &_Context, TargetAsmBackend &_Backend,
96 MCCodeEmitter &_Emitter, raw_ostream &_OS)
97 : Context(_Context), Backend(_Backend), Emitter(_Emitter),
98 OS(_OS), SubsectionsViaSymbols(false)
102 MCAssembler::~MCAssembler() {
105 static bool isScatteredFixupFullyResolvedSimple(const MCAssembler &Asm,
106 const MCAsmFixup &Fixup,
107 const MCDataFragment *DF,
108 const MCValue Target,
109 const MCSection *BaseSection) {
110 // The effective fixup address is
111 // addr(atom(A)) + offset(A)
112 // - addr(atom(B)) - offset(B)
113 // - addr(<base symbol>) + <fixup offset from base symbol>
114 // and the offsets are not relocatable, so the fixup is fully resolved when
115 // addr(atom(A)) - addr(atom(B)) - addr(<base symbol>)) == 0.
117 // The simple (Darwin, except on x86_64) way of dealing with this was to
118 // assume that any reference to a temporary symbol *must* be a temporary
119 // symbol in the same atom, unless the sections differ. Therefore, any PCrel
120 // relocation to a temporary symbol (in the same section) is fully
121 // resolved. This also works in conjunction with absolutized .set, which
122 // requires the compiler to use .set to absolutize the differences between
123 // symbols which the compiler knows to be assembly time constants, so we don't
124 // need to worry about consider symbol differences fully resolved.
126 // Non-relative fixups are only resolved if constant.
128 return Target.isAbsolute();
130 // Otherwise, relative fixups are only resolved if not a difference and the
131 // target is a temporary in the same section.
132 if (Target.isAbsolute() || Target.getSymB())
135 const MCSymbol *A = &Target.getSymA()->getSymbol();
136 if (!A->isTemporary() || !A->isInSection() ||
137 &A->getSection() != BaseSection)
143 static bool isScatteredFixupFullyResolved(const MCAssembler &Asm,
144 const MCAsmFixup &Fixup,
145 const MCDataFragment *DF,
146 const MCValue Target,
147 const MCSymbolData *BaseSymbol) {
148 // The effective fixup address is
149 // addr(atom(A)) + offset(A)
150 // - addr(atom(B)) - offset(B)
151 // - addr(BaseSymbol) + <fixup offset from base symbol>
152 // and the offsets are not relocatable, so the fixup is fully resolved when
153 // addr(atom(A)) - addr(atom(B)) - addr(BaseSymbol) == 0.
155 // Note that "false" is almost always conservatively correct (it means we emit
156 // a relocation which is unnecessary), except when it would force us to emit a
157 // relocation which the target cannot encode.
159 const MCSymbolData *A_Base = 0, *B_Base = 0;
160 if (const MCSymbolRefExpr *A = Target.getSymA()) {
161 // Modified symbol references cannot be resolved.
162 if (A->getKind() != MCSymbolRefExpr::VK_None)
165 A_Base = Asm.getAtom(&Asm.getSymbolData(A->getSymbol()));
170 if (const MCSymbolRefExpr *B = Target.getSymB()) {
171 // Modified symbol references cannot be resolved.
172 if (B->getKind() != MCSymbolRefExpr::VK_None)
175 B_Base = Asm.getAtom(&Asm.getSymbolData(B->getSymbol()));
180 // If there is no base, A and B have to be the same atom for this fixup to be
183 return A_Base == B_Base;
185 // Otherwise, B must be missing and A must be the base.
186 return !B_Base && BaseSymbol == A_Base;
189 bool MCAssembler::isSymbolLinkerVisible(const MCSymbolData *SD) const {
190 // Non-temporary labels should always be visible to the linker.
191 if (!SD->getSymbol().isTemporary())
194 // Absolute temporary labels are never visible.
195 if (!SD->getFragment())
198 // Otherwise, check if the section requires symbols even for temporary labels.
199 return getBackend().doesSectionRequireSymbols(
200 SD->getFragment()->getParent()->getSection());
203 const MCSymbolData *MCAssembler::getAtomForAddress(const MCSectionData *Section,
204 uint64_t Address) const {
205 const MCSymbolData *Best = 0;
206 for (MCAssembler::const_symbol_iterator it = symbol_begin(),
207 ie = symbol_end(); it != ie; ++it) {
208 // Ignore non-linker visible symbols.
209 if (!isSymbolLinkerVisible(it))
212 // Ignore symbols not in the same section.
213 if (!it->getFragment() || it->getFragment()->getParent() != Section)
216 // Otherwise, find the closest symbol preceding this address (ties are
217 // resolved in favor of the last defined symbol).
218 if (it->getAddress() <= Address &&
219 (!Best || it->getAddress() >= Best->getAddress()))
226 const MCSymbolData *MCAssembler::getAtom(const MCSymbolData *SD) const {
227 // Linker visible symbols define atoms.
228 if (isSymbolLinkerVisible(SD))
231 // Absolute and undefined symbols have no defining atom.
232 if (!SD->getFragment())
235 // Otherwise, search by address.
236 return getAtomForAddress(SD->getFragment()->getParent(), SD->getAddress());
239 bool MCAssembler::EvaluateFixup(const MCAsmLayout &Layout, MCAsmFixup &Fixup,
241 MCValue &Target, uint64_t &Value) const {
242 if (!Fixup.Value->EvaluateAsRelocatable(Target, &Layout))
243 llvm_report_error("expected relocatable expression");
245 // FIXME: How do non-scattered symbols work in ELF? I presume the linker
246 // doesn't support small relocations, but then under what criteria does the
247 // assembler allow symbol differences?
249 Value = Target.getConstant();
252 Emitter.getFixupKindInfo(Fixup.Kind).Flags & MCFixupKindInfo::FKF_IsPCRel;
253 bool IsResolved = true;
254 if (const MCSymbolRefExpr *A = Target.getSymA()) {
255 if (A->getSymbol().isDefined())
256 Value += getSymbolData(A->getSymbol()).getAddress();
260 if (const MCSymbolRefExpr *B = Target.getSymB()) {
261 if (B->getSymbol().isDefined())
262 Value -= getSymbolData(B->getSymbol()).getAddress();
267 // If we are using scattered symbols, determine whether this value is actually
268 // resolved; scattering may cause atoms to move.
269 if (IsResolved && getBackend().hasScatteredSymbols()) {
270 if (getBackend().hasReliableSymbolDifference()) {
271 // If this is a PCrel relocation, find the base atom (identified by its
272 // symbol) that the fixup value is relative to.
273 const MCSymbolData *BaseSymbol = 0;
275 BaseSymbol = getAtomForAddress(
276 DF->getParent(), DF->getAddress() + Fixup.Offset);
282 IsResolved = isScatteredFixupFullyResolved(*this, Fixup, DF, Target,
285 const MCSection *BaseSection = 0;
287 BaseSection = &DF->getParent()->getSection();
289 IsResolved = isScatteredFixupFullyResolvedSimple(*this, Fixup, DF, Target,
295 Value -= DF->getAddress() + Fixup.Offset;
300 void MCAssembler::LayoutSection(MCSectionData &SD,
301 MCAsmLayout &Layout) {
302 uint64_t Address = SD.getAddress();
304 for (MCSectionData::iterator it = SD.begin(), ie = SD.end(); it != ie; ++it) {
307 F.setOffset(Address - SD.getAddress());
309 // Evaluate fragment size.
310 switch (F.getKind()) {
311 case MCFragment::FT_Align: {
312 MCAlignFragment &AF = cast<MCAlignFragment>(F);
314 uint64_t Size = OffsetToAlignment(Address, AF.getAlignment());
315 if (Size > AF.getMaxBytesToEmit())
318 AF.setFileSize(Size);
322 case MCFragment::FT_Data:
323 F.setFileSize(cast<MCDataFragment>(F).getContents().size());
326 case MCFragment::FT_Fill: {
327 MCFillFragment &FF = cast<MCFillFragment>(F);
328 F.setFileSize(FF.getValueSize() * FF.getCount());
332 case MCFragment::FT_Org: {
333 MCOrgFragment &OF = cast<MCOrgFragment>(F);
335 int64_t TargetLocation;
336 if (!OF.getOffset().EvaluateAsAbsolute(TargetLocation, &Layout))
337 llvm_report_error("expected assembly-time absolute expression");
339 // FIXME: We need a way to communicate this error.
340 int64_t Offset = TargetLocation - F.getOffset();
342 llvm_report_error("invalid .org offset '" + Twine(TargetLocation) +
343 "' (at offset '" + Twine(F.getOffset()) + "'");
345 F.setFileSize(Offset);
349 case MCFragment::FT_ZeroFill: {
350 MCZeroFillFragment &ZFF = cast<MCZeroFillFragment>(F);
352 // Align the fragment offset; it is safe to adjust the offset freely since
353 // this is only in virtual sections.
354 Address = RoundUpToAlignment(Address, ZFF.getAlignment());
355 F.setOffset(Address - SD.getAddress());
357 // FIXME: This is misnamed.
358 F.setFileSize(ZFF.getSize());
363 Address += F.getFileSize();
366 // Set the section sizes.
367 SD.setSize(Address - SD.getAddress());
368 if (getBackend().isVirtualSection(SD.getSection()))
371 SD.setFileSize(Address - SD.getAddress());
374 /// WriteNopData - Write optimal nops to the output file for the \arg Count
375 /// bytes. This returns the number of bytes written. It may return 0 if
376 /// the \arg Count is more than the maximum optimal nops.
378 /// FIXME this is X86 32-bit specific and should move to a better place.
379 static uint64_t WriteNopData(uint64_t Count, MCObjectWriter *OW) {
380 static const uint8_t Nops[16][16] = {
388 {0x0f, 0x1f, 0x40, 0x00},
389 // nopl 0(%[re]ax,%[re]ax,1)
390 {0x0f, 0x1f, 0x44, 0x00, 0x00},
391 // nopw 0(%[re]ax,%[re]ax,1)
392 {0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00},
394 {0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00},
395 // nopl 0L(%[re]ax,%[re]ax,1)
396 {0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
397 // nopw 0L(%[re]ax,%[re]ax,1)
398 {0x66, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
399 // nopw %cs:0L(%[re]ax,%[re]ax,1)
400 {0x66, 0x2e, 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
401 // nopl 0(%[re]ax,%[re]ax,1)
402 // nopw 0(%[re]ax,%[re]ax,1)
403 {0x0f, 0x1f, 0x44, 0x00, 0x00,
404 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00},
405 // nopw 0(%[re]ax,%[re]ax,1)
406 // nopw 0(%[re]ax,%[re]ax,1)
407 {0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00,
408 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00},
409 // nopw 0(%[re]ax,%[re]ax,1)
410 // nopl 0L(%[re]ax) */
411 {0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00,
412 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00},
415 {0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00,
416 0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00},
418 // nopl 0L(%[re]ax,%[re]ax,1)
419 {0x0f, 0x1f, 0x80, 0x00, 0x00, 0x00, 0x00,
420 0x0f, 0x1f, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00}
426 for (uint64_t i = 0; i < Count; i++)
427 OW->Write8(uint8_t(Nops[Count - 1][i]));
432 /// WriteFragmentData - Write the \arg F data to the output file.
433 static void WriteFragmentData(const MCFragment &F, MCObjectWriter *OW) {
434 uint64_t Start = OW->getStream().tell();
439 // FIXME: Embed in fragments instead?
440 switch (F.getKind()) {
441 case MCFragment::FT_Align: {
442 MCAlignFragment &AF = cast<MCAlignFragment>(F);
443 uint64_t Count = AF.getFileSize() / AF.getValueSize();
445 // FIXME: This error shouldn't actually occur (the front end should emit
446 // multiple .align directives to enforce the semantics it wants), but is
447 // severe enough that we want to report it. How to handle this?
448 if (Count * AF.getValueSize() != AF.getFileSize())
449 llvm_report_error("undefined .align directive, value size '" +
450 Twine(AF.getValueSize()) +
451 "' is not a divisor of padding size '" +
452 Twine(AF.getFileSize()) + "'");
454 // See if we are aligning with nops, and if so do that first to try to fill
455 // the Count bytes. Then if that did not fill any bytes or there are any
456 // bytes left to fill use the the Value and ValueSize to fill the rest.
457 if (AF.getEmitNops()) {
458 uint64_t NopByteCount = WriteNopData(Count, OW);
459 Count -= NopByteCount;
462 for (uint64_t i = 0; i != Count; ++i) {
463 switch (AF.getValueSize()) {
465 assert(0 && "Invalid size!");
466 case 1: OW->Write8 (uint8_t (AF.getValue())); break;
467 case 2: OW->Write16(uint16_t(AF.getValue())); break;
468 case 4: OW->Write32(uint32_t(AF.getValue())); break;
469 case 8: OW->Write64(uint64_t(AF.getValue())); break;
475 case MCFragment::FT_Data: {
476 OW->WriteBytes(cast<MCDataFragment>(F).getContents().str());
480 case MCFragment::FT_Fill: {
481 MCFillFragment &FF = cast<MCFillFragment>(F);
482 for (uint64_t i = 0, e = FF.getCount(); i != e; ++i) {
483 switch (FF.getValueSize()) {
485 assert(0 && "Invalid size!");
486 case 1: OW->Write8 (uint8_t (FF.getValue())); break;
487 case 2: OW->Write16(uint16_t(FF.getValue())); break;
488 case 4: OW->Write32(uint32_t(FF.getValue())); break;
489 case 8: OW->Write64(uint64_t(FF.getValue())); break;
495 case MCFragment::FT_Org: {
496 MCOrgFragment &OF = cast<MCOrgFragment>(F);
498 for (uint64_t i = 0, e = OF.getFileSize(); i != e; ++i)
499 OW->Write8(uint8_t(OF.getValue()));
504 case MCFragment::FT_ZeroFill: {
505 assert(0 && "Invalid zero fill fragment in concrete section!");
510 assert(OW->getStream().tell() - Start == F.getFileSize());
513 void MCAssembler::WriteSectionData(const MCSectionData *SD,
514 MCObjectWriter *OW) const {
515 // Ignore virtual sections.
516 if (getBackend().isVirtualSection(SD->getSection())) {
517 assert(SD->getFileSize() == 0);
521 uint64_t Start = OW->getStream().tell();
524 for (MCSectionData::const_iterator it = SD->begin(),
525 ie = SD->end(); it != ie; ++it)
526 WriteFragmentData(*it, OW);
528 // Add section padding.
529 assert(SD->getFileSize() >= SD->getSize() && "Invalid section sizes!");
530 OW->WriteZeros(SD->getFileSize() - SD->getSize());
532 assert(OW->getStream().tell() - Start == SD->getFileSize());
535 void MCAssembler::Finish() {
536 DEBUG_WITH_TYPE("mc-dump", {
537 llvm::errs() << "assembler backend - pre-layout\n--\n";
540 // Layout until everything fits.
541 MCAsmLayout Layout(*this);
542 while (LayoutOnce(Layout))
545 DEBUG_WITH_TYPE("mc-dump", {
546 llvm::errs() << "assembler backend - post-layout\n--\n";
549 llvm::OwningPtr<MCObjectWriter> Writer(getBackend().createObjectWriter(OS));
551 llvm_report_error("unable to create object writer!");
553 // Allow the object writer a chance to perform post-layout binding (for
554 // example, to set the index fields in the symbol data).
555 Writer->ExecutePostLayoutBinding(*this);
557 // Evaluate and apply the fixups, generating relocation entries as necessary.
558 for (MCAssembler::iterator it = begin(), ie = end(); it != ie; ++it) {
559 for (MCSectionData::iterator it2 = it->begin(),
560 ie2 = it->end(); it2 != ie2; ++it2) {
561 MCDataFragment *DF = dyn_cast<MCDataFragment>(it2);
565 for (MCDataFragment::fixup_iterator it3 = DF->fixup_begin(),
566 ie3 = DF->fixup_end(); it3 != ie3; ++it3) {
567 MCAsmFixup &Fixup = *it3;
569 // Evaluate the fixup.
572 if (!EvaluateFixup(Layout, Fixup, DF, Target, FixedValue)) {
573 // The fixup was unresolved, we need a relocation. Inform the object
574 // writer of the relocation, and give it an opportunity to adjust the
575 // fixup value if need be.
576 Writer->RecordRelocation(*this, DF, Fixup, Target, FixedValue);
579 getBackend().ApplyFixup(Fixup, *DF, FixedValue);
584 // Write the object file.
585 Writer->WriteObject(*this);
589 bool MCAssembler::FixupNeedsRelaxation(MCAsmFixup &Fixup, MCDataFragment *DF,
590 const MCAsmLayout &Layout) const {
591 // Currently we only need to relax X86::reloc_pcrel_1byte.
592 if (unsigned(Fixup.Kind) != X86::reloc_pcrel_1byte)
595 // If we cannot resolve the fixup value, it requires relaxation.
598 if (!EvaluateFixup(Layout, Fixup, DF, Target, Value))
601 // Otherwise, relax if the value is too big for a (signed) i8.
602 return int64_t(Value) != int64_t(int8_t(Value));
605 bool MCAssembler::LayoutOnce(MCAsmLayout &Layout) {
606 // Layout the concrete sections and fragments.
607 uint64_t Address = 0;
608 MCSectionData *Prev = 0;
609 for (iterator it = begin(), ie = end(); it != ie; ++it) {
610 MCSectionData &SD = *it;
612 // Skip virtual sections.
613 if (getBackend().isVirtualSection(SD.getSection()))
616 // Align this section if necessary by adding padding bytes to the previous
618 if (uint64_t Pad = OffsetToAlignment(Address, it->getAlignment())) {
619 assert(Prev && "Missing prev section!");
620 Prev->setFileSize(Prev->getFileSize() + Pad);
624 // Layout the section fragments and its size.
625 SD.setAddress(Address);
626 LayoutSection(SD, Layout);
627 Address += SD.getFileSize();
632 // Layout the virtual sections.
633 for (iterator it = begin(), ie = end(); it != ie; ++it) {
634 MCSectionData &SD = *it;
636 if (!getBackend().isVirtualSection(SD.getSection()))
639 // Align this section if necessary by adding padding bytes to the previous
641 if (uint64_t Pad = OffsetToAlignment(Address, it->getAlignment()))
644 SD.setAddress(Address);
645 LayoutSection(SD, Layout);
646 Address += SD.getSize();
649 // Scan the fixups in order and relax any that don't fit.
650 for (iterator it = begin(), ie = end(); it != ie; ++it) {
651 MCSectionData &SD = *it;
653 for (MCSectionData::iterator it2 = SD.begin(),
654 ie2 = SD.end(); it2 != ie2; ++it2) {
655 MCDataFragment *DF = dyn_cast<MCDataFragment>(it2);
659 for (MCDataFragment::fixup_iterator it3 = DF->fixup_begin(),
660 ie3 = DF->fixup_end(); it3 != ie3; ++it3) {
661 MCAsmFixup &Fixup = *it3;
663 // Check whether we need to relax this fixup.
664 if (!FixupNeedsRelaxation(Fixup, DF, Layout))
667 // Relax the instruction.
669 // FIXME: This is a huge temporary hack which just looks for x86
670 // branches; the only thing we need to relax on x86 is
671 // 'X86::reloc_pcrel_1byte'. Once we have MCInst fragments, this will be
672 // replaced by a TargetAsmBackend hook (most likely tblgen'd) to relax
673 // an individual MCInst.
674 SmallVectorImpl<char> &C = DF->getContents();
675 uint64_t PrevOffset = Fixup.Offset;
679 if (unsigned(C[Fixup.Offset-1]) >= 0x70 &&
680 unsigned(C[Fixup.Offset-1]) <= 0x7f) {
681 C[Fixup.Offset] = C[Fixup.Offset-1] + 0x10;
682 C[Fixup.Offset-1] = char(0x0f);
687 } else if (C[Fixup.Offset-1] == char(0xeb)) {
688 C[Fixup.Offset-1] = char(0xe9);
692 llvm_unreachable("unknown 1 byte pcrel instruction!");
694 Fixup.Value = MCBinaryExpr::Create(
695 MCBinaryExpr::Sub, Fixup.Value,
696 MCConstantExpr::Create(3, getContext()),
698 C.insert(C.begin() + Fixup.Offset, Amt, char(0));
699 Fixup.Kind = MCFixupKind(X86::reloc_pcrel_4byte);
701 // Update the remaining fixups, which have slid.
703 // FIXME: This is bad for performance, but will be eliminated by the
704 // move to MCInst specific fragments.
706 for (; it3 != ie3; ++it3)
709 // Update all the symbols for this fragment, which may have slid.
711 // FIXME: This is really really bad for performance, but will be
712 // eliminated by the move to MCInst specific fragments.
713 for (MCAssembler::symbol_iterator it = symbol_begin(),
714 ie = symbol_end(); it != ie; ++it) {
715 MCSymbolData &SD = *it;
717 if (it->getFragment() != DF)
720 if (SD.getOffset() > PrevOffset)
721 SD.setOffset(SD.getOffset() + Amt);
726 // FIXME: This is O(N^2), but will be eliminated once we have a smart
727 // MCAsmLayout object.
740 raw_ostream &operator<<(raw_ostream &OS, const MCAsmFixup &AF) {
741 OS << "<MCAsmFixup" << " Offset:" << AF.Offset << " Value:" << *AF.Value
742 << " Kind:" << AF.Kind << ">";
748 void MCFragment::dump() {
749 raw_ostream &OS = llvm::errs();
751 OS << "<MCFragment " << (void*) this << " Offset:" << Offset
752 << " FileSize:" << FileSize;
757 void MCAlignFragment::dump() {
758 raw_ostream &OS = llvm::errs();
760 OS << "<MCAlignFragment ";
761 this->MCFragment::dump();
763 OS << " Alignment:" << getAlignment()
764 << " Value:" << getValue() << " ValueSize:" << getValueSize()
765 << " MaxBytesToEmit:" << getMaxBytesToEmit() << ">";
768 void MCDataFragment::dump() {
769 raw_ostream &OS = llvm::errs();
771 OS << "<MCDataFragment ";
772 this->MCFragment::dump();
775 for (unsigned i = 0, e = getContents().size(); i != e; ++i) {
777 OS << hexdigit((Contents[i] >> 4) & 0xF) << hexdigit(Contents[i] & 0xF);
779 OS << "] (" << getContents().size() << " bytes)";
781 if (!getFixups().empty()) {
784 for (fixup_iterator it = fixup_begin(), ie = fixup_end(); it != ie; ++it) {
785 if (it != fixup_begin()) OS << ",\n ";
794 void MCFillFragment::dump() {
795 raw_ostream &OS = llvm::errs();
797 OS << "<MCFillFragment ";
798 this->MCFragment::dump();
800 OS << " Value:" << getValue() << " ValueSize:" << getValueSize()
801 << " Count:" << getCount() << ">";
804 void MCOrgFragment::dump() {
805 raw_ostream &OS = llvm::errs();
807 OS << "<MCOrgFragment ";
808 this->MCFragment::dump();
810 OS << " Offset:" << getOffset() << " Value:" << getValue() << ">";
813 void MCZeroFillFragment::dump() {
814 raw_ostream &OS = llvm::errs();
816 OS << "<MCZeroFillFragment ";
817 this->MCFragment::dump();
819 OS << " Size:" << getSize() << " Alignment:" << getAlignment() << ">";
822 void MCSectionData::dump() {
823 raw_ostream &OS = llvm::errs();
825 OS << "<MCSectionData";
826 OS << " Alignment:" << getAlignment() << " Address:" << Address
827 << " Size:" << Size << " FileSize:" << FileSize
828 << " Fragments:[\n ";
829 for (iterator it = begin(), ie = end(); it != ie; ++it) {
830 if (it != begin()) OS << ",\n ";
836 void MCSymbolData::dump() {
837 raw_ostream &OS = llvm::errs();
839 OS << "<MCSymbolData Symbol:" << getSymbol()
840 << " Fragment:" << getFragment() << " Offset:" << getOffset()
841 << " Flags:" << getFlags() << " Index:" << getIndex();
843 OS << " (common, size:" << getCommonSize()
844 << " align: " << getCommonAlignment() << ")";
847 if (isPrivateExtern())
848 OS << " (private extern)";
852 void MCAssembler::dump() {
853 raw_ostream &OS = llvm::errs();
855 OS << "<MCAssembler\n";
856 OS << " Sections:[\n ";
857 for (iterator it = begin(), ie = end(); it != ie; ++it) {
858 if (it != begin()) OS << ",\n ";
864 for (symbol_iterator it = symbol_begin(), ie = symbol_end(); it != ie; ++it) {
865 if (it != symbol_begin()) OS << ",\n ";