Some first rudimentary support for ARM EHABI: print exception table in "text mode".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127099 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 87 insertions, 0 deletions

diff --git a/lib/CodeGen/AsmPrinter/ARMException.cpp b/lib/CodeGen/AsmPrinter/ARMException.cpp
new file mode 100644
index 0000000000..0db28a636a
--- /dev/null
+++ b/lib/CodeGen/AsmPrinter/ARMException.cpp
@@ -0,0 +1,87 @@
+//===-- CodeGen/AsmPrinter/ARMException.cpp - ARM EHABI Exception Impl ----===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing DWARF exception info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DwarfException.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetFrameLowering.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Twine.h"
+using namespace llvm;
+
+ARMException::ARMException(AsmPrinter *A)
+  : DwarfException(A),
+    shouldEmitTable(false), shouldEmitMoves(false), shouldEmitTableModule(false)
+    {}
+
+ARMException::~ARMException() {}
+
+void ARMException::EndModule() {
+}
+
+/// BeginFunction - Gather pre-function exception information. Assumes it's
+/// being emitted immediately after the function entry point.
+void ARMException::BeginFunction(const MachineFunction *MF) {
+  Asm->OutStreamer.EmitFnStart();
+  if (!Asm->MF->getFunction()->doesNotThrow() || UnwindTablesMandatory)
+    Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
+                                                  Asm->getFunctionNumber()));
+}
+
+/// EndFunction - Gather and emit post-function exception information.
+///
+void ARMException::EndFunction() {
+  if (Asm->MF->getFunction()->doesNotThrow() && !UnwindTablesMandatory)
+    Asm->OutStreamer.EmitCantUnwind();
+  else {
+    Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
+                                                  Asm->getFunctionNumber()));
+
+    // Emit references to personality.
+    if (const Function * Personality =
+        MMI->getPersonalities()[MMI->getPersonalityIndex()]) {
+      MCSymbol *PerSym = Asm->Mang->getSymbol(Personality);
+      Asm->OutStreamer.EmitSymbolAttribute(PerSym, MCSA_Global);
+      Asm->OutStreamer.EmitPersonality(PerSym);
+    }
+
+    // Map all labels and get rid of any dead landing pads.
+    MMI->TidyLandingPads();
+
+    Asm->OutStreamer.EmitHandlerData();
+
+    // Emit actual exception table
+    EmitExceptionTable();
+  }
+
+  Asm->OutStreamer.EmitFnEnd();
+}