#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.
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 void EmitSymbol(MCStreamer &streamer, const MCSymbol &symbol,
- unsigned symbolEncoding) {
+ unsigned symbolEncoding, const char *comment = 0) {
MCContext &context = streamer.getContext();
const MCAsmInfo &asmInfo = context.getAsmInfo();
const MCExpr *v = asmInfo.getExprForFDESymbol(&symbol,
symbolEncoding,
streamer);
unsigned size = getSizeForEncoding(streamer, symbolEncoding);
+ if (streamer.isVerboseAsm() && comment) streamer.AddComment(comment);
streamer.EmitAbsValue(v, size);
}
void EmitCFIInstruction(MCStreamer &Streamer,
const MCCFIInstruction &Instr);
};
+
+} // end anonymous namespace
+
+static void EmitEncodingByte(MCStreamer &Streamer, unsigned Encoding,
+ StringRef Prefix) {
+ if (Streamer.isVerboseAsm()) {
+ const char *EncStr = 0;
+ switch (Encoding) {
+ default: EncStr = "<unknown encoding>";
+ case dwarf::DW_EH_PE_absptr: EncStr = "absptr";
+ case dwarf::DW_EH_PE_omit: EncStr = "omit";
+ case dwarf::DW_EH_PE_pcrel: EncStr = "pcrel";
+ case dwarf::DW_EH_PE_udata4: EncStr = "udata4";
+ case dwarf::DW_EH_PE_udata8: EncStr = "udata8";
+ case dwarf::DW_EH_PE_sdata4: EncStr = "sdata4";
+ case dwarf::DW_EH_PE_sdata8: EncStr = "sdata8";
+ case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata4: EncStr = "pcrel udata4";
+ case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata4: EncStr = "pcrel sdata4";
+ case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_udata8: EncStr = "pcrel udata8";
+ case dwarf::DW_EH_PE_pcrel |dwarf::DW_EH_PE_sdata8: EncStr = "pcrel sdata8";
+ case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata4:
+ EncStr = "indirect pcrel udata4";
+ case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata4:
+ EncStr = "indirect pcrel sdata4";
+ case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_udata8:
+ EncStr = "indirect pcrel udata8";
+ case dwarf::DW_EH_PE_indirect |dwarf::DW_EH_PE_pcrel|dwarf::DW_EH_PE_sdata8:
+ EncStr = "indirect pcrel sdata8";
+ }
+
+ Streamer.AddComment(Twine(Prefix) + " = " + EncStr);
+ }
+
+ Streamer.EmitIntValue(Encoding, 1);
}
void FrameEmitterImpl::EmitCFIInstruction(MCStreamer &Streamer,
const MCCFIInstruction &Instr) {
int dataAlignmentFactor = getDataAlignmentFactor(Streamer);
+ bool VerboseAsm = Streamer.isVerboseAsm();
switch (Instr.getOperation()) {
case MCCFIInstruction::Move:
// If advancing cfa.
if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
if (Src.getReg() == MachineLocation::VirtualFP) {
+ if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa_offset");
Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_offset, 1);
} else {
+ if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa");
Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa, 1);
+ if (VerboseAsm) Streamer.AddComment(Twine("Reg ") +
+ Twine(Src.getReg()));
Streamer.EmitULEB128IntValue(Src.getReg());
}
else
CFAOffset = -Src.getOffset();
+ if (VerboseAsm) Streamer.AddComment(Twine("Offset " + Twine(CFAOffset)));
Streamer.EmitULEB128IntValue(CFAOffset);
return;
}
if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) {
assert(Dst.isReg() && "Machine move not supported yet.");
+ if (VerboseAsm) Streamer.AddComment("DW_CFA_def_cfa_register");
Streamer.EmitIntValue(dwarf::DW_CFA_def_cfa_register, 1);
+ if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Dst.getReg()));
Streamer.EmitULEB128IntValue(Dst.getReg());
return;
}
unsigned Reg = Src.getReg();
-
int Offset = Dst.getOffset();
if (IsRelative)
Offset -= CFAOffset;
Offset = Offset / dataAlignmentFactor;
if (Offset < 0) {
+ if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended_sf");
Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended_sf, 1);
+ if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg));
Streamer.EmitULEB128IntValue(Reg);
+ if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset));
Streamer.EmitSLEB128IntValue(Offset);
} else if (Reg < 64) {
+ 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);
} else {
+ if (VerboseAsm) Streamer.AddComment("DW_CFA_offset_extended");
Streamer.EmitIntValue(dwarf::DW_CFA_offset_extended, 1);
+ if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg));
Streamer.EmitULEB128IntValue(Reg);
+ if (VerboseAsm) Streamer.AddComment(Twine("Offset ") + Twine(Offset));
Streamer.EmitULEB128IntValue(Offset);
}
return;
}
case MCCFIInstruction::Remember:
+ if (VerboseAsm) Streamer.AddComment("DW_CFA_remember_state");
Streamer.EmitIntValue(dwarf::DW_CFA_remember_state, 1);
return;
case MCCFIInstruction::Restore:
+ if (VerboseAsm) Streamer.AddComment("DW_CFA_restore_state");
Streamer.EmitIntValue(dwarf::DW_CFA_restore_state, 1);
return;
case MCCFIInstruction::SameValue: {
unsigned Reg = Instr.getDestination().getReg();
+ if (VerboseAsm) Streamer.AddComment("DW_CFA_same_value");
Streamer.EmitIntValue(dwarf::DW_CFA_same_value, 1);
+ if (VerboseAsm) Streamer.AddComment(Twine("Reg ") + Twine(Reg));
Streamer.EmitULEB128IntValue(Reg);
return;
}
if (BaseLabel && Label) {
MCSymbol *ThisSym = Label;
if (ThisSym != BaseLabel) {
+ if (streamer.isVerboseAsm()) streamer.AddComment("DW_CFA_advance_loc4");
streamer.EmitDwarfAdvanceFrameAddr(BaseLabel, ThisSym);
BaseLabel = ThisSym;
}
#else
MCContext &Context = Streamer.getContext();
const TargetAsmInfo &TAI = Context.getTargetAsmInfo();
- Streamer.SwitchSection(TAI.getCompactUnwindSection());
+ bool VerboseAsm = Streamer.isVerboseAsm();
// range-start range-length compact-unwind-enc personality-func lsda
// _foo LfooEnd-_foo 0x00000023 0 0
// .quad __gxx_personality
// .quad except_tab1
+ Streamer.SwitchSection(TAI.getCompactUnwindSection());
+
// Range Start
unsigned FDEEncoding = TAI.getFDEEncoding(UsingCFI);
unsigned Size = getSizeForEncoding(Streamer, FDEEncoding);
+ if (VerboseAsm) Streamer.AddComment("Range Start");
Streamer.EmitSymbolValue(Frame.Function, Size);
// Range Length
const MCExpr *Range = MakeStartMinusEndExpr(Streamer, *Frame.Begin,
*Frame.End, 0);
- Streamer.EmitAbsValue(Range, 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");
+ Streamer.EmitIntValue(Encoding, Size);
// Personality Function
Size = getSizeForEncoding(Streamer, Frame.PersonalityEncoding);
+ if (VerboseAsm) Streamer.AddComment("Personality Function");
if (Frame.Personality)
Streamer.EmitSymbolValue(Frame.Personality, Size);
else
// LSDA
Size = getSizeForEncoding(Streamer, Frame.LsdaEncoding);
+ if (VerboseAsm) Streamer.AddComment("LSDA");
if (Frame.Lsda)
Streamer.EmitSymbolValue(Frame.Lsda, Size);
else
unsigned lsdaEncoding) {
MCContext &context = streamer.getContext();
const TargetAsmInfo &asmInfo = context.getTargetAsmInfo();
+ bool verboseAsm = streamer.isVerboseAsm();
MCSymbol *sectionStart;
if (asmInfo.isFunctionEHFrameSymbolPrivate() || !IsEH)
else
sectionStart = context.GetOrCreateSymbol(Twine("EH_frame") + Twine(CIENum));
+ streamer.EmitLabel(sectionStart);
CIENum++;
MCSymbol *sectionEnd = streamer.getContext().CreateTempSymbol();
// Length
const MCExpr *Length = MakeStartMinusEndExpr(streamer, *sectionStart,
*sectionEnd, 4);
- streamer.EmitLabel(sectionStart);
+ if (verboseAsm) streamer.AddComment("CIE Length");
streamer.EmitAbsValue(Length, 4);
// CIE ID
unsigned CIE_ID = IsEH ? 0 : -1;
+ if (verboseAsm) streamer.AddComment("CIE ID Tag");
streamer.EmitIntValue(CIE_ID, 4);
// Version
+ if (verboseAsm) streamer.AddComment("DW_CIE_VERSION");
streamer.EmitIntValue(dwarf::DW_CIE_VERSION, 1);
// Augmentation String
SmallString<8> Augmentation;
if (IsEH) {
+ if (verboseAsm) streamer.AddComment("CIE Augmentation");
Augmentation += "z";
if (personality)
Augmentation += "P";
streamer.EmitIntValue(0, 1);
// Code Alignment Factor
+ if (verboseAsm) streamer.AddComment("CIE Code Alignment Factor");
streamer.EmitULEB128IntValue(1);
// Data Alignment Factor
+ if (verboseAsm) streamer.AddComment("CIE Data Alignment Factor");
streamer.EmitSLEB128IntValue(getDataAlignmentFactor(streamer));
// Return Address Register
+ if (verboseAsm) streamer.AddComment("CIE Return Address Column");
streamer.EmitULEB128IntValue(asmInfo.getDwarfRARegNum(true));
// Augmentation Data Length (optional)
// Encoding of the FDE pointers
augmentationLength += 1;
+ if (verboseAsm) streamer.AddComment("Augmentation Size");
streamer.EmitULEB128IntValue(augmentationLength);
// Augmentation Data (optional)
if (personality) {
// Personality Encoding
- streamer.EmitIntValue(personalityEncoding, 1);
+ EmitEncodingByte(streamer, personalityEncoding,
+ "Personality Encoding");
// Personality
+ if (verboseAsm) streamer.AddComment("Personality");
EmitPersonality(streamer, *personality, personalityEncoding);
}
+
if (lsda)
- streamer.EmitIntValue(lsdaEncoding, 1); // LSDA Encoding
+ EmitEncodingByte(streamer, lsdaEncoding, "LSDA Encoding");
+
// Encoding of the FDE pointers
- streamer.EmitIntValue(asmInfo.getFDEEncoding(UsingCFI), 1);
+ EmitEncodingByte(streamer, asmInfo.getFDEEncoding(UsingCFI),
+ "FDE Encoding");
}
// Initial Instructions
MCSymbol *fdeStart = context.CreateTempSymbol();
MCSymbol *fdeEnd = context.CreateTempSymbol();
const TargetAsmInfo &TAsmInfo = context.getTargetAsmInfo();
+ bool verboseAsm = streamer.isVerboseAsm();
if (!TAsmInfo.isFunctionEHFrameSymbolPrivate() && IsEH) {
- MCSymbol *EHSym = context.GetOrCreateSymbol(
- frame.Function->getName() + Twine(".eh"));
+ MCSymbol *EHSym =
+ context.GetOrCreateSymbol(frame.Function->getName() + Twine(".eh"));
streamer.EmitEHSymAttributes(frame.Function, EHSym);
streamer.EmitLabel(EHSym);
}
// Length
const MCExpr *Length = MakeStartMinusEndExpr(streamer, *fdeStart, *fdeEnd, 0);
+ if (verboseAsm) streamer.AddComment("FDE Length");
streamer.EmitAbsValue(Length, 4);
streamer.EmitLabel(fdeStart);
if (IsEH) {
const MCExpr *offset = MakeStartMinusEndExpr(streamer, cieStart, *fdeStart,
0);
+ if (verboseAsm) streamer.AddComment("FDE CIE Offset");
streamer.EmitAbsValue(offset, 4);
} else if (!asmInfo.doesDwarfRequireRelocationForSectionOffset()) {
const MCExpr *offset = MakeStartMinusEndExpr(streamer, *SectionStart,
} else {
streamer.EmitSymbolValue(&cieStart, 4);
}
+
unsigned fdeEncoding = TAsmInfo.getFDEEncoding(UsingCFI);
unsigned size = getSizeForEncoding(streamer, fdeEncoding);
unsigned PCBeginEncoding = IsEH ? fdeEncoding :
(unsigned)dwarf::DW_EH_PE_absptr;
unsigned PCBeginSize = getSizeForEncoding(streamer, PCBeginEncoding);
- EmitSymbol(streamer, *frame.Begin, PCBeginEncoding);
+ EmitSymbol(streamer, *frame.Begin, PCBeginEncoding, "FDE initial location");
// PC Range
const MCExpr *Range = MakeStartMinusEndExpr(streamer, *frame.Begin,
*frame.End, 0);
+ if (verboseAsm) streamer.AddComment("FDE address range");
streamer.EmitAbsValue(Range, size);
if (IsEH) {
if (frame.Lsda)
augmentationLength += getSizeForEncoding(streamer, frame.LsdaEncoding);
+ if (verboseAsm) streamer.AddComment("Augmentation size");
streamer.EmitULEB128IntValue(augmentationLength);
// Augmentation Data
if (frame.Lsda)
- EmitSymbol(streamer, *frame.Lsda, frame.LsdaEncoding);
+ EmitSymbol(streamer, *frame.Lsda, frame.LsdaEncoding,
+ "Language Specific Data Area");
}
// Call Frame Instructions
projects / oota-llvm.git / blobdiff