//
//===----------------------------------------------------------------------===//
-#include "llvm/ADT/FoldingSet.h"
-#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCDwarf.h"
-#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCObjectWriter.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/Twine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/TargetAsmBackend.h"
-#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Twine.h"
using namespace llvm;
// Given a special op, return the address skip amount (in units of
#define SPECIAL_ADDR(op) (((op) - DWARF2_LINE_OPCODE_BASE)/DWARF2_LINE_RANGE)
// The maximum address skip amount that can be encoded with a special op.
-#define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255)
+#define MAX_SPECIAL_ADDR_DELTA SPECIAL_ADDR(255)
// First special line opcode - leave room for the standard opcodes.
// Note: If you want to change this, you'll have to update the
// "standard_opcode_lengths" table that is emitted in DwarfFileTable::Emit().
-#define DWARF2_LINE_OPCODE_BASE 13
+#define DWARF2_LINE_OPCODE_BASE 13
// Minimum line offset in a special line info. opcode. This value
// was chosen to give a reasonable range of values.
-#define DWARF2_LINE_BASE -5
+#define DWARF2_LINE_BASE -5
// Range of line offsets in a special line info. opcode.
-# define DWARF2_LINE_RANGE 14
+#define DWARF2_LINE_RANGE 14
// Define the architecture-dependent minimum instruction length (in bytes).
// This value should be rather too small than too big.
-# define DWARF2_LINE_MIN_INSN_LENGTH 1
+#define DWARF2_LINE_MIN_INSN_LENGTH 1
// Note: when DWARF2_LINE_MIN_INSN_LENGTH == 1 which is the current setting,
// this routine is a nop and will be optimized away.
// At this point we want to emit/create the sequence to encode the delta in
// line numbers and the increment of the address from the previous Label
// and the current Label.
- MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label);
+ const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo();
+ MCOS->EmitDwarfAdvanceLineAddr(LineDelta, LastLabel, Label,
+ asmInfo.getPointerSize());
LastLine = it->getLine();
LastLabel = Label;
MCOS->EmitLabel(SectionEnd);
// Switch back the the dwarf line section.
- MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection());
+ MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection());
- MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd);
+ const MCAsmInfo &asmInfo = MCOS->getContext().getAsmInfo();
+ MCOS->EmitDwarfAdvanceLineAddr(INT64_MAX, LastLabel, SectionEnd,
+ asmInfo.getPointerSize());
}
//
void MCDwarfFileTable::Emit(MCStreamer *MCOS) {
MCContext &context = MCOS->getContext();
// Switch to the section where the table will be emitted into.
- MCOS->SwitchSection(context.getTargetAsmInfo().getDwarfLineSection());
+ MCOS->SwitchSection(context.getObjectFileInfo()->getDwarfLineSection());
// Create a symbol at the beginning of this section.
MCSymbol *LineStartSym = context.CreateTempSymbol();
const std::vector<const MCSection *> &MCLineSectionOrder =
MCOS->getContext().getMCLineSectionOrder();
for (std::vector<const MCSection*>::const_iterator it =
- MCLineSectionOrder.begin(), ie = MCLineSectionOrder.end(); it != ie;
+ MCLineSectionOrder.begin(), ie = MCLineSectionOrder.end(); it != ie;
++it) {
const MCSection *Sec = *it;
const MCLineSection *Line = MCLineSections.lookup(Sec);
static int getDataAlignmentFactor(MCStreamer &streamer) {
MCContext &context = streamer.getContext();
- const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
+ const MCAsmInfo &asmInfo = context.getAsmInfo();
int size = asmInfo.getPointerSize();
- if (asmInfo.getStackGrowthDirection() == TargetFrameLowering::StackGrowsUp)
+ if (asmInfo.isStackGrowthDirectionUp())
return size;
- else
- return -size;
+ else
+ return -size;
}
static unsigned getSizeForEncoding(MCStreamer &streamer,
unsigned symbolEncoding) {
MCContext &context = streamer.getContext();
- const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
unsigned format = symbolEncoding & 0x0f;
switch (format) {
default:
assert(0 && "Unknown Encoding");
case dwarf::DW_EH_PE_absptr:
case dwarf::DW_EH_PE_signed:
- return asmInfo.getPointerSize();
+ return context.getAsmInfo().getPointerSize();
case dwarf::DW_EH_PE_udata2:
case dwarf::DW_EH_PE_sdata2:
return 2;
}
static const MachineLocation TranslateMachineLocation(
- const TargetAsmInfo &AsmInfo,
+ const MCRegisterInfo &MRI,
const MachineLocation &Loc) {
unsigned Reg = Loc.getReg() == MachineLocation::VirtualFP ?
MachineLocation::VirtualFP :
- unsigned(AsmInfo.getDwarfRegNum(Loc.getReg(), true));
+ unsigned(MRI.getDwarfRegNum(Loc.getReg(), true));
const MachineLocation &NewLoc = Loc.isReg() ?
MachineLocation(Reg) : MachineLocation(Reg, Loc.getOffset());
return NewLoc;
bool UsingCFI;
bool IsEH;
const MCSymbol *SectionStart;
-
public:
- FrameEmitterImpl(bool usingCFI, bool isEH, const MCSymbol *sectionStart) :
- CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH),
- SectionStart(sectionStart) {
- }
+ FrameEmitterImpl(bool usingCFI, bool isEH)
+ : CFAOffset(0), CIENum(0), UsingCFI(usingCFI), IsEH(isEH),
+ SectionStart(0) {}
+
+ void setSectionStart(const MCSymbol *Label) { SectionStart = Label; }
/// EmitCompactUnwind - Emit the unwind information in a compact way. If
/// we're successful, return 'true'. Otherwise, return 'false' and it will
if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset));
Streamer.EmitSLEB128IntValue(Offset);
} else if (Reg < 64) {
- if (VerboseAsm) Streamer.AddComment("DW_CFA_offset");
+ if (VerboseAsm) Streamer.AddComment(Twine("DW_CFA_offset + Reg(") +
+ Twine(Reg) + ")");
Streamer.EmitIntValue(dwarf::DW_CFA_offset + Reg, 1);
if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset));
Streamer.EmitULEB128IntValue(Offset);
/// normal CIE and FDE.
bool FrameEmitterImpl::EmitCompactUnwind(MCStreamer &Streamer,
const MCDwarfFrameInfo &Frame) {
-#if 1
- return false;
-#else
MCContext &Context = Streamer.getContext();
- const TargetAsmInfo &TAI = Context.getTargetAsmInfo();
+ const MCObjectFileInfo *MOFI = Context.getObjectFileInfo();
bool VerboseAsm = Streamer.isVerboseAsm();
// range-start range-length compact-unwind-enc personality-func lsda
// .quad __gxx_personality
// .quad except_tab1
- Streamer.SwitchSection(TAI.getCompactUnwindSection());
+ uint32_t Encoding = Frame.CompactUnwindEncoding;
+ if (!Encoding) return false;
+
+ // The encoding needs to know we have an LSDA.
+ if (Frame.Lsda)
+ Encoding |= 0x40000000;
+
+ Streamer.SwitchSection(MOFI->getCompactUnwindSection());
// Range Start
- unsigned FDEEncoding = TAI.getFDEEncoding(UsingCFI);
+ unsigned FDEEncoding = MOFI->getFDEEncoding(UsingCFI);
unsigned Size = getSizeForEncoding(Streamer, FDEEncoding);
if (VerboseAsm) Streamer.AddComment("Range Start");
Streamer.EmitSymbolValue(Frame.Function, Size);
if (VerboseAsm) Streamer.AddComment("Range Length");
Streamer.EmitAbsValue(Range, 4);
- // FIXME:
// Compact Encoding
- const std::vector<MachineMove> &Moves = TAI.getInitialFrameState();
- uint32_t Encoding = 0;
Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_udata4);
- if (VerboseAsm) Streamer.AddComment("Compact Unwind Encoding");
+ if (VerboseAsm) Streamer.AddComment(Twine("Compact Unwind Encoding: 0x") +
+ Twine(llvm::utohexstr(Encoding)));
Streamer.EmitIntValue(Encoding, Size);
+
// Personality Function
- Size = getSizeForEncoding(Streamer, Frame.PersonalityEncoding);
+ Size = getSizeForEncoding(Streamer, dwarf::DW_EH_PE_absptr);
if (VerboseAsm) Streamer.AddComment("Personality Function");
if (Frame.Personality)
Streamer.EmitSymbolValue(Frame.Personality, Size);
Streamer.EmitIntValue(0, Size); // No LSDA
return true;
-#endif
}
const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
const MCSymbol *lsda,
unsigned lsdaEncoding) {
MCContext &context = streamer.getContext();
- const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
+ const MCRegisterInfo &MRI = context.getRegisterInfo();
+ const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
bool verboseAsm = streamer.isVerboseAsm();
MCSymbol *sectionStart;
- if (asmInfo.isFunctionEHFrameSymbolPrivate() || !IsEH)
+ if (MOFI->isFunctionEHFrameSymbolPrivate() || !IsEH)
sectionStart = context.CreateTempSymbol();
else
sectionStart = context.GetOrCreateSymbol(Twine("EH_frame") + Twine(CIENum));
streamer.EmitLabel(sectionStart);
CIENum++;
- MCSymbol *sectionEnd = streamer.getContext().CreateTempSymbol();
+ MCSymbol *sectionEnd = context.CreateTempSymbol();
// Length
const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart,
// Return Address Register
if (verboseAsm) streamer.AddComment("CIE Return Address Column");
- streamer.EmitULEB128IntValue(asmInfo.getDwarfRARegNum(true));
+ streamer.EmitULEB128IntValue(MRI.getDwarfRegNum(MRI.getRARegister(), true));
// Augmentation Data Length (optional)
EmitEncodingByte(streamer, lsdaEncoding, "LSDA Encoding");
// Encoding of the FDE pointers
- EmitEncodingByte(streamer, asmInfo.getFDEEncoding(UsingCFI),
+ EmitEncodingByte(streamer, MOFI->getFDEEncoding(UsingCFI),
"FDE Encoding");
}
// Initial Instructions
- const std::vector<MachineMove> &Moves = asmInfo.getInitialFrameState();
+ const MCAsmInfo &MAI = context.getAsmInfo();
+ const std::vector<MachineMove> &Moves = MAI.getInitialFrameState();
std::vector<MCCFIInstruction> Instructions;
for (int i = 0, n = Moves.size(); i != n; ++i) {
MCSymbol *Label = Moves[i].getLabel();
const MachineLocation &Dst =
- TranslateMachineLocation(asmInfo, Moves[i].getDestination());
+ TranslateMachineLocation(MRI, Moves[i].getDestination());
const MachineLocation &Src =
- TranslateMachineLocation(asmInfo, Moves[i].getSource());
+ TranslateMachineLocation(MRI, Moves[i].getSource());
MCCFIInstruction Inst(Label, Dst, Src);
Instructions.push_back(Inst);
}
EmitCFIInstructions(streamer, Instructions, NULL);
// Padding
- streamer.EmitValueToAlignment(IsEH ? 4 : asmInfo.getPointerSize());
+ streamer.EmitValueToAlignment(IsEH
+ ? 4 : context.getAsmInfo().getPointerSize());
streamer.EmitLabel(sectionEnd);
return *sectionStart;
MCContext &context = streamer.getContext();
MCSymbol *fdeStart = context.CreateTempSymbol();
MCSymbol *fdeEnd = context.CreateTempSymbol();
- const TargetAsmInfo &TAsmInfo = context.getTargetAsmInfo();
+ const MCObjectFileInfo *MOFI = context.getObjectFileInfo();
bool verboseAsm = streamer.isVerboseAsm();
- if (!TAsmInfo.isFunctionEHFrameSymbolPrivate() && IsEH) {
+ if (IsEH && frame.Function && !MOFI->isFunctionEHFrameSymbolPrivate()) {
MCSymbol *EHSym =
context.GetOrCreateSymbol(frame.Function->getName() + Twine(".eh"));
streamer.EmitEHSymAttributes(frame.Function, EHSym);
streamer.EmitSymbolValue(&cieStart, 4);
}
- unsigned fdeEncoding = TAsmInfo.getFDEEncoding(UsingCFI);
+ unsigned fdeEncoding = MOFI->getFDEEncoding(UsingCFI);
unsigned size = getSizeForEncoding(streamer, fdeEncoding);
// PC Begin
bool UsingCFI,
bool IsEH) {
MCContext &Context = Streamer.getContext();
- const TargetAsmInfo &AsmInfo = Context.getTargetAsmInfo();
- const MCSection &Section = IsEH ? *AsmInfo.getEHFrameSection() :
- *AsmInfo.getDwarfFrameSection();
+ MCObjectFileInfo *MOFI =
+ const_cast<MCObjectFileInfo*>(Context.getObjectFileInfo());
+ FrameEmitterImpl Emitter(UsingCFI, IsEH);
+ ArrayRef<MCDwarfFrameInfo> FrameArray = Streamer.getFrameInfos();
+
+ // Emit the compact unwind info if available.
+ // FIXME: This emits both the compact unwind and the old CIE/FDE
+ // information. Only one of those is needed.
+ if (IsEH && MOFI->getCompactUnwindSection())
+ for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) {
+ const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i);
+ if (!Frame.CompactUnwindEncoding)
+ Emitter.EmitCompactUnwind(Streamer, Frame);
+ }
+
+ const MCSection &Section = IsEH ? *MOFI->getEHFrameSection() :
+ *MOFI->getDwarfFrameSection();
Streamer.SwitchSection(&Section);
MCSymbol *SectionStart = Context.CreateTempSymbol();
Streamer.EmitLabel(SectionStart);
+ Emitter.setSectionStart(SectionStart);
MCSymbol *FDEEnd = NULL;
DenseMap<CIEKey, const MCSymbol*> CIEStarts;
- FrameEmitterImpl Emitter(UsingCFI, IsEH, SectionStart);
const MCSymbol *DummyDebugKey = NULL;
- for (unsigned i = 0, n = Streamer.getNumFrameInfos(); i < n; ++i) {
- const MCDwarfFrameInfo &Frame = Streamer.getFrameInfo(i);
- if (IsEH && AsmInfo.getCompactUnwindSection() &&
- Emitter.EmitCompactUnwind(Streamer, Frame))
- continue;
-
+ for (unsigned i = 0, n = FrameArray.size(); i < n; ++i) {
+ const MCDwarfFrameInfo &Frame = FrameArray[i];
CIEKey Key(Frame.Personality, Frame.PersonalityEncoding,
Frame.LsdaEncoding);
const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey;
Streamer.EmitLabel(FDEEnd);
}
- Streamer.EmitValueToAlignment(AsmInfo.getPointerSize());
+ Streamer.EmitValueToAlignment(Context.getAsmInfo().getPointerSize());
if (FDEEnd)
Streamer.EmitLabel(FDEEnd);
}
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