95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
|
//===-- 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/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/TargetMachine.h"
|
||
|
|
#include "llvm/Target/TargetOptions.h"
|
||
|
|
#include "llvm/Target/TargetRegisterInfo.h"
|
||
|
|
#include "llvm/Support/CommandLine.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;
|
||
|
|
|
||
|
|
cl::opt<bool>
|
||
|
|
EnableARMEHABIDescriptors("arm-enable-ehabi-descriptors", cl::Hidden,
|
||
|
|
cl::desc("Generate ARM EHABI tables with unwinding descriptors"),
|
||
|
|
cl::init(false));
|
||
|
|
|
||
|
|
|
||
|
|
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()->needsUnwindTableEntry())
|
||
|
|
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()->needsUnwindTableEntry())
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (EnableARMEHABIDescriptors) {
|
||
|
|
// Map all labels and get rid of any dead landing pads.
|
||
|
|
MMI->TidyLandingPads();
|
||
|
|
|
||
|
|
Asm->OutStreamer.EmitHandlerData();
|
||
|
|
|
||
|
|
// Emit actual exception table
|
||
|
|
EmitExceptionTable();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Asm->OutStreamer.EmitFnEnd();
|
||
|
|
}
|