//===----------------------------------------------------------------------===//
#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Function.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/ErrorHandling.h"
#include <cctype>
#include <cstring>
-
using namespace llvm;
-TargetAsmInfo::TargetAsmInfo() :
- TextSection("\t.text"),
- TextSection_(0),
- DataSection("\t.data"),
- DataSection_(0),
- BSSSection("\t.bss"),
- BSSSection_(0),
- ReadOnlySection(0),
- ReadOnlySection_(0),
- SmallDataSection(0),
- SmallBSSSection(0),
- SmallRODataSection(0),
- TLSDataSection("\t.section .tdata,\"awT\",@progbits"),
- TLSDataSection_(0),
- TLSBSSSection("\t.section .tbss,\"awT\",@nobits"),
- TLSBSSSection_(0),
- ZeroFillDirective(0),
- NonexecutableStackDirective(0),
- NeedsSet(false),
- MaxInstLength(4),
- PCSymbol("$"),
- SeparatorChar(';'),
- CommentString("#"),
- GlobalPrefix(""),
- PrivateGlobalPrefix("."),
- LessPrivateGlobalPrefix(""),
- JumpTableSpecialLabelPrefix(0),
- GlobalVarAddrPrefix(""),
- GlobalVarAddrSuffix(""),
- FunctionAddrPrefix(""),
- FunctionAddrSuffix(""),
- PersonalityPrefix(""),
- PersonalitySuffix(""),
- NeedsIndirectEncoding(false),
- InlineAsmStart("#APP"),
- InlineAsmEnd("#NO_APP"),
- AssemblerDialect(0),
- StringConstantPrefix(".str"),
- ZeroDirective("\t.zero\t"),
- ZeroDirectiveSuffix(0),
- AsciiDirective("\t.ascii\t"),
- AscizDirective("\t.asciz\t"),
- Data8bitsDirective("\t.byte\t"),
- Data16bitsDirective("\t.short\t"),
- Data32bitsDirective("\t.long\t"),
- Data64bitsDirective("\t.quad\t"),
- AlignDirective("\t.align\t"),
- AlignmentIsInBytes(true),
- TextAlignFillValue(0),
- SwitchToSectionDirective("\t.section\t"),
- TextSectionStartSuffix(""),
- DataSectionStartSuffix(""),
- SectionEndDirectiveSuffix(0),
- ConstantPoolSection("\t.section .rodata"),
- JumpTableDataSection("\t.section .rodata"),
- JumpTableDirective(0),
- CStringSection(0),
- CStringSection_(0),
- StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
- StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
- FourByteConstantSection(0),
- FourByteConstantSection_(0),
- EightByteConstantSection(0),
- EightByteConstantSection_(0),
- SixteenByteConstantSection(0),
- SixteenByteConstantSection_(0),
- GlobalDirective("\t.globl\t"),
- SetDirective(0),
- LCOMMDirective(0),
- COMMDirective("\t.comm\t"),
- COMMDirectiveTakesAlignment(true),
- HasDotTypeDotSizeDirective(true),
- UsedDirective(0),
- WeakRefDirective(0),
- WeakDefDirective(0),
- HiddenDirective("\t.hidden\t"),
- ProtectedDirective("\t.protected\t"),
- AbsoluteDebugSectionOffsets(false),
- AbsoluteEHSectionOffsets(false),
- HasLEB128(false),
- HasDotLocAndDotFile(false),
- SupportsDebugInformation(false),
- SupportsExceptionHandling(false),
- DwarfRequiresFrameSection(true),
- GlobalEHDirective(0),
- SupportsWeakOmittedEHFrame(true),
- DwarfSectionOffsetDirective(0),
- DwarfAbbrevSection(".debug_abbrev"),
- DwarfInfoSection(".debug_info"),
- DwarfLineSection(".debug_line"),
- DwarfFrameSection(".debug_frame"),
- DwarfPubNamesSection(".debug_pubnames"),
- DwarfPubTypesSection(".debug_pubtypes"),
- DwarfStrSection(".debug_str"),
- DwarfLocSection(".debug_loc"),
- DwarfARangesSection(".debug_aranges"),
- DwarfRangesSection(".debug_ranges"),
- DwarfMacInfoSection(".debug_macinfo"),
- DwarfEHFrameSection(".eh_frame"),
- DwarfExceptionSection(".gcc_except_table"),
- AsmTransCBE(0) {
- TextSection_ = getUnnamedSection(TextSection);
- DataSection_ = getUnnamedSection(DataSection);
+TargetAsmInfo::TargetAsmInfo(const TargetMachine &tm)
+: TM(tm) {
+ BSSSection = "\t.bss";
+ BSSSection_ = 0;
+ ReadOnlySection = 0;
+ SmallDataSection = 0;
+ SmallBSSSection = 0;
+ SmallRODataSection = 0;
+ TLSDataSection = 0;
+ TLSBSSSection = 0;
+ ZeroFillDirective = 0;
+ NonexecutableStackDirective = 0;
+ NeedsSet = false;
+ MaxInstLength = 4;
+ PCSymbol = "$";
+ SeparatorChar = ';';
+ CommentColumn = 60;
+ CommentString = "#";
+ GlobalPrefix = "";
+ PrivateGlobalPrefix = ".";
+ LessPrivateGlobalPrefix = "";
+ JumpTableSpecialLabelPrefix = 0;
+ GlobalVarAddrPrefix = "";
+ GlobalVarAddrSuffix = "";
+ FunctionAddrPrefix = "";
+ FunctionAddrSuffix = "";
+ PersonalityPrefix = "";
+ PersonalitySuffix = "";
+ NeedsIndirectEncoding = false;
+ InlineAsmStart = "#APP";
+ InlineAsmEnd = "#NO_APP";
+ AssemblerDialect = 0;
+ AllowQuotesInName = false;
+ ZeroDirective = "\t.zero\t";
+ ZeroDirectiveSuffix = 0;
+ AsciiDirective = "\t.ascii\t";
+ AscizDirective = "\t.asciz\t";
+ Data8bitsDirective = "\t.byte\t";
+ Data16bitsDirective = "\t.short\t";
+ Data32bitsDirective = "\t.long\t";
+ Data64bitsDirective = "\t.quad\t";
+ AlignDirective = "\t.align\t";
+ AlignmentIsInBytes = true;
+ TextAlignFillValue = 0;
+ SwitchToSectionDirective = "\t.section\t";
+ TextSectionStartSuffix = "";
+ DataSectionStartSuffix = "";
+ SectionEndDirectiveSuffix = 0;
+ ConstantPoolSection = "\t.section .rodata";
+ JumpTableDataSection = "\t.section .rodata";
+ JumpTableDirective = 0;
+ CStringSection = 0;
+ CStringSection_ = 0;
+ // FIXME: Flags are ELFish - replace with normal section stuff.
+ StaticCtorsSection = "\t.section .ctors,\"aw\",@progbits";
+ StaticDtorsSection = "\t.section .dtors,\"aw\",@progbits";
+ GlobalDirective = "\t.globl\t";
+ SetDirective = 0;
+ LCOMMDirective = 0;
+ COMMDirective = "\t.comm\t";
+ COMMDirectiveTakesAlignment = true;
+ HasDotTypeDotSizeDirective = true;
+ HasSingleParameterDotFile = true;
+ UsedDirective = 0;
+ WeakRefDirective = 0;
+ WeakDefDirective = 0;
+ // FIXME: These are ELFish - move to ELFTAI.
+ HiddenDirective = "\t.hidden\t";
+ ProtectedDirective = "\t.protected\t";
+ AbsoluteDebugSectionOffsets = false;
+ AbsoluteEHSectionOffsets = false;
+ HasLEB128 = false;
+ HasDotLocAndDotFile = false;
+ SupportsDebugInformation = false;
+ SupportsExceptionHandling = false;
+ DwarfRequiresFrameSection = true;
+ DwarfUsesInlineInfoSection = false;
+ Is_EHSymbolPrivate = true;
+ GlobalEHDirective = 0;
+ SupportsWeakOmittedEHFrame = true;
+ DwarfSectionOffsetDirective = 0;
+ DwarfAbbrevSection = ".debug_abbrev";
+ DwarfInfoSection = ".debug_info";
+ DwarfLineSection = ".debug_line";
+ DwarfFrameSection = ".debug_frame";
+ DwarfPubNamesSection = ".debug_pubnames";
+ DwarfPubTypesSection = ".debug_pubtypes";
+ DwarfDebugInlineSection = ".debug_inlined";
+ DwarfStrSection = ".debug_str";
+ DwarfLocSection = ".debug_loc";
+ DwarfARangesSection = ".debug_aranges";
+ DwarfRangesSection = ".debug_ranges";
+ DwarfMacroInfoSection = ".debug_macinfo";
+ DwarfEHFrameSection = ".eh_frame";
+ DwarfExceptionSection = ".gcc_except_table";
+ AsmTransCBE = 0;
+ TextSection = getUnnamedSection("\t.text", SectionFlags::Code);
+ DataSection = getUnnamedSection("\t.data", SectionFlags::Writeable);
}
TargetAsmInfo::~TargetAsmInfo() {
return (C->isNullValue() && !GV->isConstant() && !NoZerosInBSS);
}
+static bool isConstantString(const Constant *C) {
+ // First check: is we have constant array of i8 terminated with zero
+ const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
+ // Check, if initializer is a null-terminated string
+ if (CVA && CVA->isCString())
+ return true;
+
+ // Another possibility: [1 x i8] zeroinitializer
+ if (isa<ConstantAggregateZero>(C)) {
+ if (const ArrayType *Ty = dyn_cast<ArrayType>(C->getType())) {
+ return (Ty->getElementType() == Type::Int8Ty &&
+ Ty->getNumElements() == 1);
+ }
+ }
+
+ return false;
+}
+
+unsigned TargetAsmInfo::RelocBehaviour() const {
+ // By default - all relocations in PIC mode would force symbol to be
+ // placed in r/w section.
+ return (TM.getRelocationModel() != Reloc::Static ?
+ Reloc::LocalOrGlobal : Reloc::None);
+}
+
SectionKind::Kind
TargetAsmInfo::SectionKindForGlobal(const GlobalValue *GV) const {
// Early exit - functions should be always in text sections.
// check its initializer to decide, which section to output it into. Also
// note, there is no thread-local r/o section.
Constant *C = GVar->getInitializer();
- if (C->ContainsRelocations())
- return SectionKind::ROData;
- else {
- const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
+ if (C->ContainsRelocations(Reloc::LocalOrGlobal)) {
+ // Decide, whether it is still possible to put symbol into r/o section.
+ unsigned Reloc = RelocBehaviour();
+
+ // We already did a query for 'all' relocs, thus - early exits.
+ if (Reloc == Reloc::LocalOrGlobal)
+ return SectionKind::Data;
+ else if (Reloc == Reloc::None)
+ return SectionKind::ROData;
+ else {
+ // Ok, target wants something funny. Honour it.
+ return (C->ContainsRelocations(Reloc) ?
+ SectionKind::Data : SectionKind::ROData);
+ }
+ } else {
// Check, if initializer is a null-terminated string
- if (CVA && CVA->isCString())
+ if (isConstantString(C))
return SectionKind::RODataMergeStr;
else
return SectionKind::RODataMergeConst;
}
}
- // Variable is not constant or thread-local - emit to generic data section.
+ // Variable either is not constant or thread-local - output to data section.
return (isThreadLocal ? SectionKind::ThreadData : SectionKind::Data);
}
Flags |= SectionFlags::TLS;
// FALLS THROUGH
case SectionKind::Data:
+ case SectionKind::DataRel:
+ case SectionKind::DataRelLocal:
+ case SectionKind::DataRelRO:
+ case SectionKind::DataRelROLocal:
case SectionKind::BSS:
Flags |= SectionFlags::Writeable;
break;
Flags |= SectionFlags::Small;
break;
default:
- assert(0 && "Unexpected section kind!");
+ llvm_unreachable("Unexpected section kind!");
}
if (GV->isWeakForLinker())
return getNamedSection(Name.c_str(), Flags);
} else {
if (Kind == SectionKind::Text)
- return getTextSection_();
+ return getTextSection();
else if (isBSS(Kind) && getBSSSection_())
return getBSSSection_();
- else if (getReadOnlySection_() && SectionKind::isReadOnly(Kind))
- return getReadOnlySection_();
+ else if (getReadOnlySection() && SectionKind::isReadOnly(Kind))
+ return getReadOnlySection();
}
- return getDataSection_();
+ return getDataSection();
}
// Lame default implementation. Calculate the section name for machine const.
const Section*
TargetAsmInfo::SelectSectionForMachineConst(const Type *Ty) const {
// FIXME: Support data.rel stuff someday
- return getDataSection_();
+ return getDataSection();
}
std::string
return ".gnu.linkonce.t." + GV->getName();
case SectionKind::Data:
return ".gnu.linkonce.d." + GV->getName();
+ case SectionKind::DataRel:
+ return ".gnu.linkonce.d.rel" + GV->getName();
+ case SectionKind::DataRelLocal:
+ return ".gnu.linkonce.d.rel.local" + GV->getName();
+ case SectionKind::DataRelRO:
+ return ".gnu.linkonce.d.rel.ro" + GV->getName();
+ case SectionKind::DataRelROLocal:
+ return ".gnu.linkonce.d.rel.ro.local" + GV->getName();
case SectionKind::SmallData:
return ".gnu.linkonce.s." + GV->getName();
case SectionKind::BSS:
case SectionKind::ThreadBSS:
return ".gnu.linkonce.tb." + GV->getName();
default:
- assert(0 && "Unknown section kind");
+ llvm_unreachable("Unknown section kind");
}
+ return NULL;
}
const Section*
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