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Parsing and plumbing for .cfi_sections.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131117 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -50,6 +50,9 @@ namespace llvm {
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MCStreamer(const MCStreamer&); // DO NOT IMPLEMENT
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MCStreamer &operator=(const MCStreamer&); // DO NOT IMPLEMENT
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bool EmitEHFrame;
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bool EmitDebugFrame;
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std::vector<MCDwarfFrameInfo> FrameInfos;
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MCDwarfFrameInfo *getCurrentFrameInfo();
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void EnsureValidFrame();
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@ -436,6 +439,7 @@ namespace llvm {
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void EmitDwarfSetLineAddr(int64_t LineDelta, const MCSymbol *Label,
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int PointerSize);
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virtual void EmitCFISections(bool EH, bool Debug);
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virtual void EmitCFIStartProc();
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virtual void EmitCFIEndProc();
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virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset);
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@ -243,6 +243,8 @@ public:
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AddDirectiveHandler<&GenericAsmParser::ParseDirectiveStabs>(".stabs");
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// CFI directives.
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AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFISections>(
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".cfi_sections");
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AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIStartProc>(
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".cfi_startproc");
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AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIEndProc>(
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@ -289,6 +291,7 @@ public:
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bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc);
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bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc);
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bool ParseDirectiveStabs(StringRef, SMLoc DirectiveLoc);
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bool ParseDirectiveCFISections(StringRef, SMLoc DirectiveLoc);
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bool ParseDirectiveCFIStartProc(StringRef, SMLoc DirectiveLoc);
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bool ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc);
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bool ParseDirectiveCFIDefCfa(StringRef, SMLoc DirectiveLoc);
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@ -2265,6 +2268,39 @@ bool GenericAsmParser::ParseDirectiveStabs(StringRef Directive,
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return TokError("unsupported directive '" + Directive + "'");
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}
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/// ParseDirectiveCFISections
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/// ::= .cfi_sections section [, section]
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bool GenericAsmParser::ParseDirectiveCFISections(StringRef,
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SMLoc DirectiveLoc) {
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StringRef Name;
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bool EH = false;
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bool Debug = false;
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if (getParser().ParseIdentifier(Name))
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return TokError("Expected an identifier");
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if (Name == ".eh_frame")
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EH = true;
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else if (Name == ".debug_frame")
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Debug = true;
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if (getLexer().is(AsmToken::Comma)) {
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Lex();
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if (getParser().ParseIdentifier(Name))
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return TokError("Expected an identifier");
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if (Name == ".eh_frame")
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EH = true;
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else if (Name == ".debug_frame")
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Debug = true;
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}
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getStreamer().EmitCFISections(EH, Debug);
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return false;
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}
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/// ParseDirectiveCFIStartProc
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/// ::= .cfi_startproc
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bool GenericAsmParser::ParseDirectiveCFIStartProc(StringRef,
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@ -20,7 +20,8 @@
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#include <cstdlib>
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using namespace llvm;
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MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx) {
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MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
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EmitDebugFrame(false) {
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const MCSection *section = NULL;
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SectionStack.push_back(std::make_pair(section, section));
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}
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@ -176,6 +177,11 @@ void MCStreamer::EmitLabel(MCSymbol *Symbol) {
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LastNonPrivate = Symbol;
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}
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void MCStreamer::EmitCFISections(bool EH, bool Debug) {
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EmitEHFrame = EH;
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EmitDebugFrame = Debug;
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}
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void MCStreamer::EmitCFIStartProc() {
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MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
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if (CurFrame && !CurFrame->End)
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