Add support for .cfi_signal_frame. Fixes pr11762.
llvm-svn: 148733
diff --git a/llvm/lib/MC/MCAsmStreamer.cpp b/llvm/lib/MC/MCAsmStreamer.cpp
index 87516e0..a2fb7a4 100644
--- a/llvm/lib/MC/MCAsmStreamer.cpp
+++ b/llvm/lib/MC/MCAsmStreamer.cpp
@@ -222,6 +222,7 @@
virtual void EmitCFISameValue(int64_t Register);
virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset);
virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment);
+ virtual void EmitCFISignalFrame();
virtual void EmitWin64EHStartProc(const MCSymbol *Symbol);
virtual void EmitWin64EHEndProc();
@@ -993,6 +994,16 @@
EmitEOL();
}
+void MCAsmStreamer::EmitCFISignalFrame() {
+ MCStreamer::EmitCFISignalFrame();
+
+ if (!UseCFI)
+ return;
+
+ OS << "\t.cif_signal_frame";
+ EmitEOL();
+}
+
void MCAsmStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
MCStreamer::EmitWin64EHStartProc(Symbol);
diff --git a/llvm/lib/MC/MCDwarf.cpp b/llvm/lib/MC/MCDwarf.cpp
index 1547687..65f1ad1 100644
--- a/llvm/lib/MC/MCDwarf.cpp
+++ b/llvm/lib/MC/MCDwarf.cpp
@@ -840,6 +840,7 @@
const MCSymbol *personality,
unsigned personalityEncoding,
const MCSymbol *lsda,
+ bool IsSignalFrame,
unsigned lsdaEncoding);
MCSymbol *EmitFDE(MCStreamer &streamer,
const MCSymbol &cieStart,
@@ -1111,6 +1112,7 @@
const MCSymbol *personality,
unsigned personalityEncoding,
const MCSymbol *lsda,
+ bool IsSignalFrame,
unsigned lsdaEncoding) {
MCContext &context = streamer.getContext();
const MCRegisterInfo &MRI = context.getRegisterInfo();
@@ -1153,6 +1155,8 @@
if (lsda)
Augmentation += "L";
Augmentation += "R";
+ if (IsSignalFrame)
+ Augmentation += "S";
streamer.EmitBytes(Augmentation.str(), 0);
}
streamer.EmitIntValue(0, 1);
@@ -1312,17 +1316,18 @@
namespace {
struct CIEKey {
- static const CIEKey getEmptyKey() { return CIEKey(0, 0, -1); }
- static const CIEKey getTombstoneKey() { return CIEKey(0, -1, 0); }
+ static const CIEKey getEmptyKey() { return CIEKey(0, 0, -1, false); }
+ static const CIEKey getTombstoneKey() { return CIEKey(0, -1, 0, false); }
CIEKey(const MCSymbol* Personality_, unsigned PersonalityEncoding_,
- unsigned LsdaEncoding_) : Personality(Personality_),
- PersonalityEncoding(PersonalityEncoding_),
- LsdaEncoding(LsdaEncoding_) {
+ unsigned LsdaEncoding_, bool IsSignalFrame_) :
+ Personality(Personality_), PersonalityEncoding(PersonalityEncoding_),
+ LsdaEncoding(LsdaEncoding_), IsSignalFrame(IsSignalFrame_) {
}
const MCSymbol* Personality;
unsigned PersonalityEncoding;
unsigned LsdaEncoding;
+ bool IsSignalFrame;
};
}
@@ -1340,13 +1345,15 @@
ID.AddPointer(Key.Personality);
ID.AddInteger(Key.PersonalityEncoding);
ID.AddInteger(Key.LsdaEncoding);
+ ID.AddBoolean(Key.IsSignalFrame);
return ID.ComputeHash();
}
static bool isEqual(const CIEKey &LHS,
const CIEKey &RHS) {
return LHS.Personality == RHS.Personality &&
LHS.PersonalityEncoding == RHS.PersonalityEncoding &&
- LHS.LsdaEncoding == RHS.LsdaEncoding;
+ LHS.LsdaEncoding == RHS.LsdaEncoding &&
+ LHS.IsSignalFrame == RHS.IsSignalFrame;
}
};
}
@@ -1382,11 +1389,12 @@
for (unsigned i = 0, n = FrameArray.size(); i < n; ++i) {
const MCDwarfFrameInfo &Frame = FrameArray[i];
CIEKey Key(Frame.Personality, Frame.PersonalityEncoding,
- Frame.LsdaEncoding);
+ Frame.LsdaEncoding, Frame.IsSignalFrame);
const MCSymbol *&CIEStart = IsEH ? CIEStarts[Key] : DummyDebugKey;
if (!CIEStart)
CIEStart = &Emitter.EmitCIE(Streamer, Frame.Personality,
Frame.PersonalityEncoding, Frame.Lsda,
+ Frame.IsSignalFrame,
Frame.LsdaEncoding);
FDEEnd = Emitter.EmitFDE(Streamer, *CIEStart, Frame);
diff --git a/llvm/lib/MC/MCParser/AsmParser.cpp b/llvm/lib/MC/MCParser/AsmParser.cpp
index baf8b30..64d0dd8 100644
--- a/llvm/lib/MC/MCParser/AsmParser.cpp
+++ b/llvm/lib/MC/MCParser/AsmParser.cpp
@@ -306,6 +306,8 @@
&GenericAsmParser::ParseDirectiveCFIRestore>(".cfi_restore");
AddDirectiveHandler<
&GenericAsmParser::ParseDirectiveCFIEscape>(".cfi_escape");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFISignalFrame>(".cfi_signal_frame");
// Macro directives.
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
@@ -341,6 +343,7 @@
bool ParseDirectiveCFISameValue(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIRestore(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIEscape(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFISignalFrame(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveMacrosOnOff(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveMacro(StringRef, SMLoc DirectiveLoc);
@@ -2855,6 +2858,19 @@
return false;
}
+/// ParseDirectiveCFISignalFrame
+/// ::= .cfi_signal_frame
+bool GenericAsmParser::ParseDirectiveCFISignalFrame(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(getLexer().getLoc(),
+ "unexpected token in '" + Directive + "' directive");
+
+ getStreamer().EmitCFISignalFrame();
+
+ return false;
+}
+
/// ParseDirectiveMacrosOnOff
/// ::= .macros_on
/// ::= .macros_off
diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
index 7bbb379..1690eea 100644
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -439,6 +439,12 @@
CurFrame->Instructions.push_back(Instruction);
}
+void MCStreamer::EmitCFISignalFrame() {
+ EnsureValidFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->IsSignalFrame = true;
+}
+
void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
W64UnwindInfos.push_back(Frame);
CurrentW64UnwindInfo = W64UnwindInfos.back();
