mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-26 18:20:39 +00:00
05c3ddfa4e
Move the Windows unwind information emitter into a separate header. This is not related to DWARF based emission. NFC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216894 91177308-0d34-0410-b5e6-96231b3b80d8
108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
//===-- CodeGen/AsmPrinter/Win64Exception.cpp - Dwarf 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 Win64 exception info into asm files.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "Win64Exception.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/ADT/Twine.h"
|
|
#include "llvm/CodeGen/AsmPrinter.h"
|
|
#include "llvm/CodeGen/MachineFrameInfo.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineModuleInfo.h"
|
|
#include "llvm/IR/DataLayout.h"
|
|
#include "llvm/IR/Mangler.h"
|
|
#include "llvm/IR/Module.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/Support/Dwarf.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/FormattedStream.h"
|
|
#include "llvm/Target/TargetFrameLowering.h"
|
|
#include "llvm/Target/TargetLoweringObjectFile.h"
|
|
#include "llvm/Target/TargetOptions.h"
|
|
#include "llvm/Target/TargetRegisterInfo.h"
|
|
using namespace llvm;
|
|
|
|
Win64Exception::Win64Exception(AsmPrinter *A)
|
|
: EHStreamer(A), shouldEmitPersonality(false), shouldEmitLSDA(false),
|
|
shouldEmitMoves(false) {}
|
|
|
|
Win64Exception::~Win64Exception() {}
|
|
|
|
/// endModule - Emit all exception information that should come after the
|
|
/// content.
|
|
void Win64Exception::endModule() {
|
|
}
|
|
|
|
/// beginFunction - Gather pre-function exception information. Assumes it's
|
|
/// being emitted immediately after the function entry point.
|
|
void Win64Exception::beginFunction(const MachineFunction *MF) {
|
|
shouldEmitMoves = shouldEmitPersonality = shouldEmitLSDA = false;
|
|
|
|
// If any landing pads survive, we need an EH table.
|
|
bool hasLandingPads = !MMI->getLandingPads().empty();
|
|
|
|
shouldEmitMoves = Asm->needsSEHMoves();
|
|
|
|
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
|
|
unsigned PerEncoding = TLOF.getPersonalityEncoding();
|
|
const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
|
|
|
|
shouldEmitPersonality = hasLandingPads &&
|
|
PerEncoding != dwarf::DW_EH_PE_omit && Per;
|
|
|
|
unsigned LSDAEncoding = TLOF.getLSDAEncoding();
|
|
shouldEmitLSDA = shouldEmitPersonality &&
|
|
LSDAEncoding != dwarf::DW_EH_PE_omit;
|
|
|
|
if (!shouldEmitPersonality && !shouldEmitMoves)
|
|
return;
|
|
|
|
Asm->OutStreamer.EmitWinCFIStartProc(Asm->CurrentFnSym);
|
|
|
|
if (!shouldEmitPersonality)
|
|
return;
|
|
|
|
const MCSymbol *PersHandlerSym =
|
|
TLOF.getCFIPersonalitySymbol(Per, *Asm->Mang, Asm->TM, MMI);
|
|
Asm->OutStreamer.EmitWinEHHandler(PersHandlerSym, true, true);
|
|
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
|
|
Asm->getFunctionNumber()));
|
|
}
|
|
|
|
/// endFunction - Gather and emit post-function exception information.
|
|
///
|
|
void Win64Exception::endFunction(const MachineFunction *) {
|
|
if (!shouldEmitPersonality && !shouldEmitMoves)
|
|
return;
|
|
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
|
|
Asm->getFunctionNumber()));
|
|
|
|
// Map all labels and get rid of any dead landing pads.
|
|
MMI->TidyLandingPads();
|
|
|
|
if (shouldEmitPersonality) {
|
|
Asm->OutStreamer.PushSection();
|
|
Asm->OutStreamer.EmitWinEHHandlerData();
|
|
emitExceptionTable();
|
|
Asm->OutStreamer.PopSection();
|
|
}
|
|
Asm->OutStreamer.EmitWinCFIEndProc();
|
|
}
|