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[rustc.git] / src / llvm / lib / Target / AArch64 / AArch64TargetObjectFile.cpp
1 //===-- AArch64TargetObjectFile.cpp - AArch64 Object Info -----------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "AArch64TargetObjectFile.h"
11 #include "AArch64TargetMachine.h"
12 #include "llvm/IR/Mangler.h"
13 #include "llvm/MC/MCContext.h"
14 #include "llvm/MC/MCExpr.h"
15 #include "llvm/MC/MCStreamer.h"
16 #include "llvm/Support/Dwarf.h"
17 using namespace llvm;
18 using namespace dwarf;
19
20 void AArch64_ELFTargetObjectFile::Initialize(MCContext &Ctx,
21 const TargetMachine &TM) {
22 TargetLoweringObjectFileELF::Initialize(Ctx, TM);
23 InitializeELF(TM.Options.UseInitArray);
24 }
25
26 const MCExpr *AArch64_MachoTargetObjectFile::getTTypeGlobalReference(
27 const GlobalValue *GV, unsigned Encoding, Mangler &Mang,
28 const TargetMachine &TM, MachineModuleInfo *MMI,
29 MCStreamer &Streamer) const {
30 // On Darwin, we can reference dwarf symbols with foo@GOT-., which
31 // is an indirect pc-relative reference. The default implementation
32 // won't reference using the GOT, so we need this target-specific
33 // version.
34 if (Encoding & (DW_EH_PE_indirect | DW_EH_PE_pcrel)) {
35 const MCSymbol *Sym = TM.getSymbol(GV, Mang);
36 const MCExpr *Res =
37 MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_GOT, getContext());
38 MCSymbol *PCSym = getContext().CreateTempSymbol();
39 Streamer.EmitLabel(PCSym);
40 const MCExpr *PC = MCSymbolRefExpr::Create(PCSym, getContext());
41 return MCBinaryExpr::CreateSub(Res, PC, getContext());
42 }
43
44 return TargetLoweringObjectFileMachO::getTTypeGlobalReference(
45 GV, Encoding, Mang, TM, MMI, Streamer);
46 }
47
48 MCSymbol *AArch64_MachoTargetObjectFile::getCFIPersonalitySymbol(
49 const GlobalValue *GV, Mangler &Mang, const TargetMachine &TM,
50 MachineModuleInfo *MMI) const {
51 return TM.getSymbol(GV, Mang);
52 }