Implement the StartProc and EndProc Win64 EH methods on the base MCStreamer.
Based largely on Rafael Espindola's work on CFI. Other methods soon to follow.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131623 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index bf63f8f..ed73c1b3 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -310,16 +310,37 @@
CurFrame->Instructions.push_back(Instruction);
}
-void MCStreamer::EmitWin64EHStartProc(MCSymbol *Symbol, MCSymbol *EHandler)
-{
- errs() << "Not implemented yet\n";
- abort();
+MCWin64EHUnwindInfo *MCStreamer::getCurrentW64UnwindInfo() {
+ if (W64UnwindInfos.empty())
+ return NULL;
+ return &W64UnwindInfos.back();
}
-void MCStreamer::EmitWin64EHEndProc()
-{
- errs() << "Not implemented yet\n";
- abort();
+void MCStreamer::EnsureValidW64UnwindInfo() {
+ MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo();
+ if (!CurFrame || CurFrame->End)
+ report_fatal_error("No open Win64 EH frame function!");
+}
+
+void MCStreamer::EmitWin64EHStartProc(MCSymbol *Symbol, MCSymbol *EHandler) {
+ MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo();
+ if (CurFrame && !CurFrame->End)
+ report_fatal_error("Starting a function before ending the previous one!");
+ MCWin64EHUnwindInfo Frame;
+ Frame.Begin = getContext().CreateTempSymbol();
+ Frame.Function = Symbol;
+ Frame.ExceptionHandler = EHandler;
+ EmitLabel(Frame.Begin);
+ W64UnwindInfos.push_back(Frame);
+}
+
+void MCStreamer::EmitWin64EHEndProc() {
+ EnsureValidW64UnwindInfo();
+ MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo();
+ if (CurFrame->Chained)
+ report_fatal_error("Not all chained regions terminated!");
+ CurFrame->End = getContext().CreateTempSymbol();
+ EmitLabel(CurFrame->End);
}
void MCStreamer::EmitWin64EHStartChained()