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-rw-r--r--include/llvm/MC/MCDwarf.h4
-rw-r--r--include/llvm/MC/MCStreamer.h1
-rw-r--r--lib/MC/MCAsmStreamer.cpp11
-rw-r--r--lib/MC/MCDwarf.cpp22
-rw-r--r--lib/MC/MCParser/AsmParser.cpp16
-rw-r--r--lib/MC/MCStreamer.cpp6
-rw-r--r--test/MC/ELF/cfi-signal-frame.s23
7 files changed, 75 insertions, 8 deletions
diff --git a/include/llvm/MC/MCDwarf.h b/include/llvm/MC/MCDwarf.h
index 9e477cb..1a56a90 100644
--- a/include/llvm/MC/MCDwarf.h
+++ b/include/llvm/MC/MCDwarf.h
@@ -312,7 +312,8 @@ namespace llvm {
struct MCDwarfFrameInfo {
MCDwarfFrameInfo() : Begin(0), End(0), Personality(0), Lsda(0),
Function(0), Instructions(), PersonalityEncoding(),
- LsdaEncoding(0), CompactUnwindEncoding(0) {}
+ LsdaEncoding(0), CompactUnwindEncoding(0),
+ IsSignalFrame(false) {}
MCSymbol *Begin;
MCSymbol *End;
const MCSymbol *Personality;
@@ -322,6 +323,7 @@ namespace llvm {
unsigned PersonalityEncoding;
unsigned LsdaEncoding;
uint32_t CompactUnwindEncoding;
+ bool IsSignalFrame;
};
class MCDwarfFrameEmitter {
diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index 54ffda6..31fb6d4 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -555,6 +555,7 @@ namespace llvm {
virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset);
virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment);
virtual void EmitCFIEscape(StringRef Values);
+ virtual void EmitCFISignalFrame();
virtual void EmitWin64EHStartProc(const MCSymbol *Symbol);
virtual void EmitWin64EHEndProc();
diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp
index 87516e0..a2fb7a4 100644
--- a/lib/MC/MCAsmStreamer.cpp
+++ b/lib/MC/MCAsmStreamer.cpp
@@ -222,6 +222,7 @@ public:
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 @@ void MCAsmStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
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/lib/MC/MCDwarf.cpp b/lib/MC/MCDwarf.cpp
index 1547687..65f1ad1 100644
--- a/lib/MC/MCDwarf.cpp
+++ b/lib/MC/MCDwarf.cpp
@@ -840,6 +840,7 @@ namespace {
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 &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
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 @@ const MCSymbol &FrameEmitterImpl::EmitCIE(MCStreamer &streamer,
if (lsda)
Augmentation += "L";
Augmentation += "R";
+ if (IsSignalFrame)
+ Augmentation += "S";
streamer.EmitBytes(Augmentation.str(), 0);
}
streamer.EmitIntValue(0, 1);
@@ -1312,17 +1316,18 @@ MCSymbol *FrameEmitterImpl::EmitFDE(MCStreamer &streamer,
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 @@ namespace llvm {
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 @@ void MCDwarfFrameEmitter::Emit(MCStreamer &Streamer,
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/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index baf8b30..64d0dd8 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -306,6 +306,8 @@ public:
&GenericAsmParser::ParseDirectiveCFIRestore>(".cfi_restore");
AddDirectiveHandler<
&GenericAsmParser::ParseDirectiveCFIEscape>(".cfi_escape");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFISignalFrame>(".cfi_signal_frame");
// Macro directives.
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
@@ -341,6 +343,7 @@ public:
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 @@ bool GenericAsmParser::ParseDirectiveCFIEscape(StringRef IDVal,
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/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 7bbb379..1690eea 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -439,6 +439,12 @@ void MCStreamer::EmitCFIEscape(StringRef Values) {
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();
diff --git a/test/MC/ELF/cfi-signal-frame.s b/test/MC/ELF/cfi-signal-frame.s
new file mode 100644
index 0000000..cf6d160
--- /dev/null
+++ b/test/MC/ELF/cfi-signal-frame.s
@@ -0,0 +1,23 @@
+// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | elf-dump --dump-section-data | FileCheck %s
+
+f:
+ .cfi_startproc
+ .cfi_signal_frame
+ .cfi_endproc
+
+g:
+ .cfi_startproc
+ .cfi_endproc
+
+// CHECK: (('sh_name', 0x00000011) # '.eh_frame'
+// CHECK-NEXT: ('sh_type', 0x00000001)
+// CHECK-NEXT: ('sh_flags', 0x0000000000000002)
+// CHECK-NEXT: ('sh_addr', 0x0000000000000000)
+// CHECK-NEXT: ('sh_offset', 0x0000000000000040)
+// CHECK-NEXT: ('sh_size', 0x0000000000000058)
+// CHECK-NEXT: ('sh_link', 0x00000000)
+// CHECK-NEXT: ('sh_info', 0x00000000)
+// CHECK-NEXT: ('sh_addralign', 0x0000000000000008)
+// CHECK-NEXT: ('sh_entsize', 0x0000000000000000)
+// CHECK-NEXT: ('_section_data', '14000000 00000000 017a5253 00017810 011b0c07 08900100 10000000 1c000000 00000000 00000000 00000000 14000000 00000000 017a5200 01781001 1b0c0708 90010000 10000000 1c000000 00000000 00000000 00000000')
+// CHECK-NEXT: ),
generated by cgit v1.1 at 2025-02-13 13:56:23 +0000