2009-07-28 11:13:23 +08:00
|
|
|
//===-- llvm/Target/TargetLoweringObjectFile.cpp - Object File Info -------===//
|
|
|
|
//
|
|
|
|
// The LLVM Compiler Infrastructure
|
|
|
|
//
|
|
|
|
// This file is distributed under the University of Illinois Open Source
|
|
|
|
// License. See LICENSE.TXT for details.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
//
|
|
|
|
// This file implements classes used to handle lowerings specific to common
|
|
|
|
// object file formats.
|
|
|
|
//
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
2018-03-24 07:58:19 +08:00
|
|
|
#include "llvm/Target/TargetLoweringObjectFile.h"
|
2017-06-07 11:48:56 +08:00
|
|
|
#include "llvm/BinaryFormat/Dwarf.h"
|
2013-01-02 19:36:10 +08:00
|
|
|
#include "llvm/IR/Constants.h"
|
|
|
|
#include "llvm/IR/DataLayout.h"
|
|
|
|
#include "llvm/IR/DerivedTypes.h"
|
|
|
|
#include "llvm/IR/Function.h"
|
|
|
|
#include "llvm/IR/GlobalVariable.h"
|
2014-01-08 05:19:40 +08:00
|
|
|
#include "llvm/IR/Mangler.h"
|
2009-08-01 02:48:30 +08:00
|
|
|
#include "llvm/MC/MCContext.h"
|
2009-09-16 09:46:41 +08:00
|
|
|
#include "llvm/MC/MCExpr.h"
|
2010-03-12 05:55:20 +08:00
|
|
|
#include "llvm/MC/MCStreamer.h"
|
2010-01-14 05:29:21 +08:00
|
|
|
#include "llvm/MC/MCSymbol.h"
|
2009-11-07 17:20:54 +08:00
|
|
|
#include "llvm/Support/ErrorHandling.h"
|
2010-01-14 05:29:21 +08:00
|
|
|
#include "llvm/Support/raw_ostream.h"
|
2014-03-04 18:07:28 +08:00
|
|
|
#include "llvm/Target/TargetMachine.h"
|
2012-12-04 00:50:05 +08:00
|
|
|
#include "llvm/Target/TargetOptions.h"
|
2009-07-28 11:13:23 +08:00
|
|
|
using namespace llvm;
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Generic Code
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
2011-07-20 13:58:47 +08:00
|
|
|
/// Initialize - this method must be called before any actual lowering is
|
|
|
|
/// done. This specifies the current context for codegen, and gives the
|
|
|
|
/// lowering implementations a chance to set up their default sections.
|
|
|
|
void TargetLoweringObjectFile::Initialize(MCContext &ctx,
|
|
|
|
const TargetMachine &TM) {
|
|
|
|
Ctx = &ctx;
|
2016-09-16 19:50:57 +08:00
|
|
|
// `Initialize` can be called more than once.
|
2017-05-02 00:18:42 +08:00
|
|
|
delete Mang;
|
2016-09-16 15:33:15 +08:00
|
|
|
Mang = new Mangler();
|
2017-08-03 04:32:26 +08:00
|
|
|
InitMCObjectFileInfo(TM.getTargetTriple(), TM.isPositionIndependent(), *Ctx,
|
|
|
|
TM.getCodeModel() == CodeModel::Large);
|
2009-07-28 11:13:23 +08:00
|
|
|
}
|
2014-04-16 12:15:25 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
TargetLoweringObjectFile::~TargetLoweringObjectFile() {
|
2016-09-16 15:33:15 +08:00
|
|
|
delete Mang;
|
2009-07-28 11:13:23 +08:00
|
|
|
}
|
|
|
|
|
2018-02-07 07:22:14 +08:00
|
|
|
static bool isNullOrUndef(const Constant *C) {
|
|
|
|
// Check that the constant isn't all zeros or undefs.
|
|
|
|
if (C->isNullValue() || isa<UndefValue>(C))
|
|
|
|
return true;
|
|
|
|
if (!isa<ConstantAggregate>(C))
|
|
|
|
return false;
|
|
|
|
for (auto Operand : C->operand_values()) {
|
|
|
|
if (!isNullOrUndef(cast<Constant>(Operand)))
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2011-12-03 06:16:29 +08:00
|
|
|
static bool isSuitableForBSS(const GlobalVariable *GV, bool NoZerosInBSS) {
|
2011-06-20 02:37:11 +08:00
|
|
|
const Constant *C = GV->getInitializer();
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// Must have zero initializer.
|
2018-02-07 07:22:14 +08:00
|
|
|
if (!isNullOrUndef(C))
|
2009-07-28 11:13:23 +08:00
|
|
|
return false;
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// Leave constant zeros in readonly constant sections, so they can be shared.
|
|
|
|
if (GV->isConstant())
|
|
|
|
return false;
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// If the global has an explicit section specified, don't put it in BSS.
|
2014-05-17 13:18:40 +08:00
|
|
|
if (GV->hasSection())
|
2009-07-28 11:13:23 +08:00
|
|
|
return false;
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// If -nozero-initialized-in-bss is specified, don't ever use BSS.
|
|
|
|
if (NoZerosInBSS)
|
|
|
|
return false;
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// Otherwise, put it in BSS!
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2009-08-05 00:13:09 +08:00
|
|
|
/// IsNullTerminatedString - Return true if the specified constant (which is
|
|
|
|
/// known to have a type that is an array of 1/2/4 byte elements) ends with a
|
2012-01-24 22:17:05 +08:00
|
|
|
/// nul value and contains no other nuls in it. Note that this is more general
|
|
|
|
/// than ConstantDataSequential::isString because we allow 2 & 4 byte strings.
|
2009-08-05 00:13:09 +08:00
|
|
|
static bool IsNullTerminatedString(const Constant *C) {
|
2012-01-24 22:17:05 +08:00
|
|
|
// First check: is we have constant array terminated with zero
|
|
|
|
if (const ConstantDataSequential *CDS = dyn_cast<ConstantDataSequential>(C)) {
|
|
|
|
unsigned NumElts = CDS->getNumElements();
|
|
|
|
assert(NumElts != 0 && "Can't have an empty CDS");
|
|
|
|
|
|
|
|
if (CDS->getElementAsInteger(NumElts-1) != 0)
|
|
|
|
return false; // Not null terminated.
|
|
|
|
|
|
|
|
// Verify that the null doesn't occur anywhere else in the string.
|
|
|
|
for (unsigned i = 0; i != NumElts-1; ++i)
|
|
|
|
if (CDS->getElementAsInteger(i) == 0)
|
|
|
|
return false;
|
|
|
|
return true;
|
|
|
|
}
|
2009-07-28 11:13:23 +08:00
|
|
|
|
|
|
|
// Another possibility: [1 x i8] zeroinitializer
|
|
|
|
if (isa<ConstantAggregateZero>(C))
|
2012-01-24 22:17:05 +08:00
|
|
|
return cast<ArrayType>(C->getType())->getNumElements() == 1;
|
2009-07-28 11:13:23 +08:00
|
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2013-12-03 00:25:47 +08:00
|
|
|
MCSymbol *TargetLoweringObjectFile::getSymbolWithGlobalValueBase(
|
2016-09-16 15:33:15 +08:00
|
|
|
const GlobalValue *GV, StringRef Suffix, const TargetMachine &TM) const {
|
2013-12-05 13:53:12 +08:00
|
|
|
assert(!Suffix.empty());
|
|
|
|
|
2013-12-03 00:25:47 +08:00
|
|
|
SmallString<60> NameStr;
|
2015-07-16 14:04:17 +08:00
|
|
|
NameStr += GV->getParent()->getDataLayout().getPrivateGlobalPrefix();
|
2016-09-16 15:33:15 +08:00
|
|
|
TM.getNameWithPrefix(NameStr, GV, *Mang);
|
2013-12-03 00:25:47 +08:00
|
|
|
NameStr.append(Suffix.begin(), Suffix.end());
|
2015-05-19 02:43:14 +08:00
|
|
|
return Ctx->getOrCreateSymbol(NameStr);
|
2013-12-03 00:25:47 +08:00
|
|
|
}
|
2013-10-30 01:28:26 +08:00
|
|
|
|
2014-02-20 01:23:20 +08:00
|
|
|
MCSymbol *TargetLoweringObjectFile::getCFIPersonalitySymbol(
|
2016-09-16 15:33:15 +08:00
|
|
|
const GlobalValue *GV, const TargetMachine &TM,
|
2014-02-20 01:23:20 +08:00
|
|
|
MachineModuleInfo *MMI) const {
|
2016-11-23 00:17:20 +08:00
|
|
|
return TM.getSymbol(GV);
|
2011-04-16 11:51:21 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
void TargetLoweringObjectFile::emitPersonalityValue(MCStreamer &Streamer,
|
2015-07-16 14:04:17 +08:00
|
|
|
const DataLayout &,
|
2011-04-16 11:51:21 +08:00
|
|
|
const MCSymbol *Sym) const {
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2009-08-05 12:25:40 +08:00
|
|
|
/// getKindForGlobal - This is a top-level target-independent classifier for
|
2009-08-02 05:11:14 +08:00
|
|
|
/// a global variable. Given an global variable and information from TM, it
|
|
|
|
/// classifies the global in a variety of ways that make various target
|
|
|
|
/// implementations simpler. The target implementation is free to ignore this
|
|
|
|
/// extra info of course.
|
2016-10-25 03:23:39 +08:00
|
|
|
SectionKind TargetLoweringObjectFile::getKindForGlobal(const GlobalObject *GO,
|
2009-08-05 12:25:40 +08:00
|
|
|
const TargetMachine &TM){
|
2016-10-25 03:23:39 +08:00
|
|
|
assert(!GO->isDeclaration() && !GO->hasAvailableExternallyLinkage() &&
|
2009-08-05 12:25:40 +08:00
|
|
|
"Can only be used for global definitions");
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
Reloc::Model ReloModel = TM.getRelocationModel();
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// Early exit - functions should be always in text sections.
|
2016-10-25 03:23:39 +08:00
|
|
|
const auto *GVar = dyn_cast<GlobalVariable>(GO);
|
2014-04-25 13:30:21 +08:00
|
|
|
if (!GVar)
|
2009-08-02 07:57:16 +08:00
|
|
|
return SectionKind::getText();
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// Handle thread-local data first.
|
|
|
|
if (GVar->isThreadLocal()) {
|
2011-12-03 06:16:29 +08:00
|
|
|
if (isSuitableForBSS(GVar, TM.Options.NoZerosInBSS))
|
2009-08-02 07:57:16 +08:00
|
|
|
return SectionKind::getThreadBSS();
|
|
|
|
return SectionKind::getThreadData();
|
2009-07-28 11:13:23 +08:00
|
|
|
}
|
|
|
|
|
2010-01-19 10:48:26 +08:00
|
|
|
// Variables with common linkage always get classified as common.
|
|
|
|
if (GVar->hasCommonLinkage())
|
|
|
|
return SectionKind::getCommon();
|
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// Variable can be easily put to BSS section.
|
2011-12-03 06:16:29 +08:00
|
|
|
if (isSuitableForBSS(GVar, TM.Options.NoZerosInBSS)) {
|
2010-01-19 12:15:51 +08:00
|
|
|
if (GVar->hasLocalLinkage())
|
|
|
|
return SectionKind::getBSSLocal();
|
|
|
|
else if (GVar->hasExternalLinkage())
|
|
|
|
return SectionKind::getBSSExtern();
|
2009-08-02 07:57:16 +08:00
|
|
|
return SectionKind::getBSS();
|
2010-01-19 12:15:51 +08:00
|
|
|
}
|
2009-07-28 11:13:23 +08:00
|
|
|
|
2011-06-20 02:37:11 +08:00
|
|
|
const Constant *C = GVar->getInitializer();
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// If the global is marked constant, we can put it into a mergable section,
|
|
|
|
// a mergable string section, or general .data if it contains relocations.
|
2011-01-18 09:23:44 +08:00
|
|
|
if (GVar->isConstant()) {
|
2009-07-28 11:13:23 +08:00
|
|
|
// If the initializer for the global contains something that requires a
|
2012-05-05 09:16:06 +08:00
|
|
|
// relocation, then we may have to drop this into a writable data section
|
2009-07-28 11:13:23 +08:00
|
|
|
// even though it is marked const.
|
2015-11-17 08:51:23 +08:00
|
|
|
if (!C->needsRelocation()) {
|
2011-01-18 09:23:44 +08:00
|
|
|
// If the global is required to have a unique address, it can't be put
|
|
|
|
// into a mergable section: just drop it into the general read-only
|
|
|
|
// section instead.
|
2016-06-15 05:01:22 +08:00
|
|
|
if (!GVar->hasGlobalUnnamedAddr())
|
2011-01-18 09:23:44 +08:00
|
|
|
return SectionKind::getReadOnly();
|
2015-11-17 08:51:23 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// If initializer is a null-terminated string, put it in a "cstring"
|
2009-08-05 00:13:09 +08:00
|
|
|
// section of the right width.
|
2011-07-18 12:54:35 +08:00
|
|
|
if (ArrayType *ATy = dyn_cast<ArrayType>(C->getType())) {
|
|
|
|
if (IntegerType *ITy =
|
2009-08-05 00:13:09 +08:00
|
|
|
dyn_cast<IntegerType>(ATy->getElementType())) {
|
|
|
|
if ((ITy->getBitWidth() == 8 || ITy->getBitWidth() == 16 ||
|
|
|
|
ITy->getBitWidth() == 32) &&
|
|
|
|
IsNullTerminatedString(C)) {
|
|
|
|
if (ITy->getBitWidth() == 8)
|
|
|
|
return SectionKind::getMergeable1ByteCString();
|
|
|
|
if (ITy->getBitWidth() == 16)
|
|
|
|
return SectionKind::getMergeable2ByteCString();
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-08-05 00:13:09 +08:00
|
|
|
assert(ITy->getBitWidth() == 32 && "Unknown width");
|
|
|
|
return SectionKind::getMergeable4ByteCString();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// Otherwise, just drop it into a mergable constant section. If we have
|
|
|
|
// a section for this size, use it, otherwise use the arbitrary sized
|
|
|
|
// mergable section.
|
2016-10-25 03:23:39 +08:00
|
|
|
switch (
|
|
|
|
GVar->getParent()->getDataLayout().getTypeAllocSize(C->getType())) {
|
2009-08-02 07:57:16 +08:00
|
|
|
case 4: return SectionKind::getMergeableConst4();
|
|
|
|
case 8: return SectionKind::getMergeableConst8();
|
|
|
|
case 16: return SectionKind::getMergeableConst16();
|
2016-02-23 06:23:11 +08:00
|
|
|
case 32: return SectionKind::getMergeableConst32();
|
2015-01-29 22:12:41 +08:00
|
|
|
default:
|
|
|
|
return SectionKind::getReadOnly();
|
2009-07-28 11:13:23 +08:00
|
|
|
}
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2015-11-17 08:51:23 +08:00
|
|
|
} else {
|
2016-08-08 23:28:31 +08:00
|
|
|
// In static, ROPI and RWPI relocation models, the linker will resolve
|
|
|
|
// all addresses, so the relocation entries will actually be constants by
|
|
|
|
// the time the app starts up. However, we can't put this into a
|
|
|
|
// mergable section, because the linker doesn't take relocations into
|
|
|
|
// consideration when it tries to merge entries in the section.
|
|
|
|
if (ReloModel == Reloc::Static || ReloModel == Reloc::ROPI ||
|
|
|
|
ReloModel == Reloc::RWPI || ReloModel == Reloc::ROPI_RWPI)
|
2009-08-02 07:57:16 +08:00
|
|
|
return SectionKind::getReadOnly();
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// Otherwise, the dynamic linker needs to fix it up, put it in the
|
|
|
|
// writable data.rel section.
|
2009-08-02 07:57:16 +08:00
|
|
|
return SectionKind::getReadOnlyWithRel();
|
2009-07-28 11:13:23 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-06-25 06:19:54 +08:00
|
|
|
// Okay, this isn't a constant.
|
2015-11-18 14:02:15 +08:00
|
|
|
return SectionKind::getData();
|
2009-07-28 11:13:23 +08:00
|
|
|
}
|
|
|
|
|
2015-05-22 03:20:38 +08:00
|
|
|
/// This method computes the appropriate section to emit the specified global
|
|
|
|
/// variable or function definition. This should not be passed external (or
|
|
|
|
/// available externally) globals.
|
2016-09-16 15:33:15 +08:00
|
|
|
MCSection *TargetLoweringObjectFile::SectionForGlobal(
|
2016-10-25 03:23:39 +08:00
|
|
|
const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const {
|
2009-07-28 11:13:23 +08:00
|
|
|
// Select section name.
|
2016-10-25 03:23:39 +08:00
|
|
|
if (GO->hasSection())
|
|
|
|
return getExplicitSectionGlobal(GO, Kind, TM);
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2017-06-05 18:09:13 +08:00
|
|
|
if (auto *GVar = dyn_cast<GlobalVariable>(GO)) {
|
|
|
|
auto Attrs = GVar->getAttributes();
|
|
|
|
if ((Attrs.hasAttribute("bss-section") && Kind.isBSS()) ||
|
|
|
|
(Attrs.hasAttribute("data-section") && Kind.isData()) ||
|
|
|
|
(Attrs.hasAttribute("rodata-section") && Kind.isReadOnly())) {
|
|
|
|
return getExplicitSectionGlobal(GO, Kind, TM);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (auto *F = dyn_cast<Function>(GO)) {
|
|
|
|
if (F->hasFnAttribute("implicit-section-name"))
|
|
|
|
return getExplicitSectionGlobal(GO, Kind, TM);
|
|
|
|
}
|
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
// Use default section depending on the 'type' of global
|
2016-10-25 03:23:39 +08:00
|
|
|
return SelectSectionForGlobal(GO, Kind, TM);
|
2009-07-28 11:13:23 +08:00
|
|
|
}
|
|
|
|
|
2015-05-22 03:20:38 +08:00
|
|
|
MCSection *TargetLoweringObjectFile::getSectionForJumpTable(
|
2016-09-16 15:33:15 +08:00
|
|
|
const Function &F, const TargetMachine &TM) const {
|
2016-02-21 09:30:30 +08:00
|
|
|
unsigned Align = 0;
|
2015-07-16 14:04:17 +08:00
|
|
|
return getSectionForConstant(F.getParent()->getDataLayout(),
|
2016-02-21 09:30:30 +08:00
|
|
|
SectionKind::getReadOnly(), /*C=*/nullptr,
|
|
|
|
Align);
|
2015-02-13 01:16:46 +08:00
|
|
|
}
|
|
|
|
|
2015-02-18 07:34:51 +08:00
|
|
|
bool TargetLoweringObjectFile::shouldPutJumpTableInFunctionSection(
|
|
|
|
bool UsesLabelDifference, const Function &F) const {
|
|
|
|
// In PIC mode, we need to emit the jump table to the same section as the
|
|
|
|
// function body itself, otherwise the label differences won't make sense.
|
|
|
|
// FIXME: Need a better predicate for this: what about custom entries?
|
|
|
|
if (UsesLabelDifference)
|
|
|
|
return true;
|
|
|
|
|
|
|
|
// We should also do if the section name is NULL or function is declared
|
|
|
|
// in discardable section
|
|
|
|
// FIXME: this isn't the right predicate, should be based on the MCSection
|
|
|
|
// for the function.
|
2017-01-15 04:09:29 +08:00
|
|
|
return F.isWeakForLinker();
|
2015-02-18 07:34:51 +08:00
|
|
|
}
|
|
|
|
|
2015-05-22 03:20:38 +08:00
|
|
|
/// Given a mergable constant with the specified size and relocation
|
|
|
|
/// information, return a section that it should be placed in.
|
2015-07-16 14:04:17 +08:00
|
|
|
MCSection *TargetLoweringObjectFile::getSectionForConstant(
|
2016-02-21 09:30:30 +08:00
|
|
|
const DataLayout &DL, SectionKind Kind, const Constant *C,
|
|
|
|
unsigned &Align) const {
|
2014-04-25 13:30:21 +08:00
|
|
|
if (Kind.isReadOnly() && ReadOnlySection != nullptr)
|
2009-07-28 11:13:23 +08:00
|
|
|
return ReadOnlySection;
|
2009-09-09 16:41:20 +08:00
|
|
|
|
2009-07-28 11:13:23 +08:00
|
|
|
return DataSection;
|
|
|
|
}
|
|
|
|
|
2012-11-14 09:47:00 +08:00
|
|
|
/// getTTypeGlobalReference - Return an MCExpr to use for a
|
2010-02-16 06:35:59 +08:00
|
|
|
/// reference to the specified global variable from exception
|
|
|
|
/// handling information.
|
2014-02-09 22:50:44 +08:00
|
|
|
const MCExpr *TargetLoweringObjectFile::getTTypeGlobalReference(
|
2016-09-16 15:33:15 +08:00
|
|
|
const GlobalValue *GV, unsigned Encoding, const TargetMachine &TM,
|
|
|
|
MachineModuleInfo *MMI, MCStreamer &Streamer) const {
|
2012-11-14 09:47:00 +08:00
|
|
|
const MCSymbolRefExpr *Ref =
|
2016-11-23 00:17:20 +08:00
|
|
|
MCSymbolRefExpr::create(TM.getSymbol(GV), getContext());
|
2012-11-14 09:47:00 +08:00
|
|
|
|
|
|
|
return getTTypeReference(Ref, Encoding, Streamer);
|
2010-02-16 06:35:59 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
const MCExpr *TargetLoweringObjectFile::
|
2012-11-14 09:47:00 +08:00
|
|
|
getTTypeReference(const MCSymbolRefExpr *Sym, unsigned Encoding,
|
|
|
|
MCStreamer &Streamer) const {
|
2011-04-15 23:11:06 +08:00
|
|
|
switch (Encoding & 0x70) {
|
2010-02-16 06:35:59 +08:00
|
|
|
default:
|
2010-04-08 06:58:41 +08:00
|
|
|
report_fatal_error("We do not support this DWARF encoding yet!");
|
2010-02-16 06:35:59 +08:00
|
|
|
case dwarf::DW_EH_PE_absptr:
|
|
|
|
// Do nothing special
|
2012-11-14 09:47:00 +08:00
|
|
|
return Sym;
|
2010-03-12 05:55:20 +08:00
|
|
|
case dwarf::DW_EH_PE_pcrel: {
|
|
|
|
// Emit a label to the streamer for the current position. This gives us
|
|
|
|
// .-foo addressing.
|
2015-05-19 02:43:14 +08:00
|
|
|
MCSymbol *PCSym = getContext().createTempSymbol();
|
2010-03-12 05:55:20 +08:00
|
|
|
Streamer.EmitLabel(PCSym);
|
2015-05-30 09:25:56 +08:00
|
|
|
const MCExpr *PC = MCSymbolRefExpr::create(PCSym, getContext());
|
|
|
|
return MCBinaryExpr::createSub(Sym, PC, getContext());
|
2010-03-12 05:55:20 +08:00
|
|
|
}
|
2010-02-16 06:35:59 +08:00
|
|
|
}
|
|
|
|
}
|
2013-06-29 04:05:11 +08:00
|
|
|
|
2013-07-03 02:47:09 +08:00
|
|
|
const MCExpr *TargetLoweringObjectFile::getDebugThreadLocalSymbol(const MCSymbol *Sym) const {
|
2013-06-29 04:05:11 +08:00
|
|
|
// FIXME: It's not clear what, if any, default this should have - perhaps a
|
|
|
|
// null return could mean 'no location' & we should just do that here.
|
2015-05-30 09:25:56 +08:00
|
|
|
return MCSymbolRefExpr::create(Sym, *Ctx);
|
2013-06-29 04:05:11 +08:00
|
|
|
}
|
2015-03-18 07:54:51 +08:00
|
|
|
|
|
|
|
void TargetLoweringObjectFile::getNameWithPrefix(
|
2016-09-16 15:33:15 +08:00
|
|
|
SmallVectorImpl<char> &OutName, const GlobalValue *GV,
|
2015-11-04 07:40:03 +08:00
|
|
|
const TargetMachine &TM) const {
|
2016-09-16 15:33:15 +08:00
|
|
|
Mang->getNameWithPrefix(OutName, GV, /*CannotUsePrivateLabel=*/false);
|
2015-03-18 07:54:51 +08:00
|
|
|
}
|