#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionCOFF.h"
#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCLabel.h"
+#include "llvm/MC/MCDwarf.h"
+#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
+#include "llvm/Support/ELF.h"
using namespace llvm;
typedef StringMap<const MCSectionMachO*> MachOUniqueMapTy;
typedef StringMap<const MCSectionCOFF*> COFFUniqueMapTy;
-MCContext::MCContext(const MCAsmInfo &mai) : MAI(mai), NextUniqueID(0) {
+MCContext::MCContext(const MCAsmInfo &mai, const TargetAsmInfo *tai) :
+ MAI(mai), TAI(tai),
+ Allocator(), Symbols(Allocator), UsedNames(Allocator),
+ NextUniqueID(0),
+ CurrentDwarfLoc(0,0,0,DWARF2_FLAG_IS_STMT,0,0),
+ AllowTemporaryLabels(true) {
MachOUniquingMap = 0;
ELFUniquingMap = 0;
COFFUniquingMap = 0;
+
+ SecureLogFile = getenv("AS_SECURE_LOG_FILE");
+ SecureLog = 0;
+ SecureLogUsed = false;
+
+ DwarfLocSeen = false;
}
MCContext::~MCContext() {
// NOTE: The symbols are all allocated out of a bump pointer allocator,
// we don't need to free them here.
-
+
// If we have the MachO uniquing map, free it.
delete (MachOUniqueMapTy*)MachOUniquingMap;
delete (ELFUniqueMapTy*)ELFUniquingMap;
delete (COFFUniqueMapTy*)COFFUniquingMap;
+
+ // If the stream for the .secure_log_unique directive was created free it.
+ delete (raw_ostream*)SecureLog;
+
+ delete TAI;
}
//===----------------------------------------------------------------------===//
MCSymbol *MCContext::GetOrCreateSymbol(StringRef Name) {
assert(!Name.empty() && "Normal symbols cannot be unnamed!");
-
- // Determine whether this is an assembler temporary or normal label.
- bool isTemporary = Name.startswith(MAI.getPrivateGlobalPrefix());
-
+
// Do the lookup and get the entire StringMapEntry. We want access to the
// key if we are creating the entry.
StringMapEntry<MCSymbol*> &Entry = Symbols.GetOrCreateValue(Name);
- if (Entry.getValue()) return Entry.getValue();
+ MCSymbol *Sym = Entry.getValue();
+
+ if (Sym)
+ return Sym;
+
+ Sym = CreateSymbol(Name);
+ Entry.setValue(Sym);
+ return Sym;
+}
+
+MCSymbol *MCContext::CreateSymbol(StringRef Name) {
+ // Determine whether this is an assembler temporary or normal label, if used.
+ bool isTemporary = false;
+ if (AllowTemporaryLabels)
+ isTemporary = Name.startswith(MAI.getPrivateGlobalPrefix());
+
+ StringMapEntry<bool> *NameEntry = &UsedNames.GetOrCreateValue(Name);
+ if (NameEntry->getValue()) {
+ assert(isTemporary && "Cannot rename non temporary symbols");
+ SmallString<128> NewName = Name;
+ do {
+ NewName.resize(Name.size());
+ raw_svector_ostream(NewName) << NextUniqueID++;
+ NameEntry = &UsedNames.GetOrCreateValue(NewName);
+ } while (NameEntry->getValue());
+ }
+ NameEntry->setValue(true);
// Ok, the entry doesn't already exist. Have the MCSymbol object itself refer
- // to the copy of the string that is embedded in the StringMapEntry.
- MCSymbol *Result = new (*this) MCSymbol(Entry.getKey(), isTemporary);
- Entry.setValue(Result);
- return Result;
+ // to the copy of the string that is embedded in the UsedNames entry.
+ MCSymbol *Result = new (*this) MCSymbol(NameEntry->getKey(), isTemporary);
+
+ return Result;
}
MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
}
MCSymbol *MCContext::CreateTempSymbol() {
+ SmallString<128> NameSV;
+ raw_svector_ostream(NameSV)
+ << MAI.getPrivateGlobalPrefix() << "tmp" << NextUniqueID++;
+ return CreateSymbol(NameSV);
+}
+
+unsigned MCContext::NextInstance(int64_t LocalLabelVal) {
+ MCLabel *&Label = Instances[LocalLabelVal];
+ if (!Label)
+ Label = new (*this) MCLabel(0);
+ return Label->incInstance();
+}
+
+unsigned MCContext::GetInstance(int64_t LocalLabelVal) {
+ MCLabel *&Label = Instances[LocalLabelVal];
+ if (!Label)
+ Label = new (*this) MCLabel(0);
+ return Label->getInstance();
+}
+
+MCSymbol *MCContext::CreateDirectionalLocalSymbol(int64_t LocalLabelVal) {
+ return GetOrCreateSymbol(Twine(MAI.getPrivateGlobalPrefix()) +
+ Twine(LocalLabelVal) +
+ "\2" +
+ Twine(NextInstance(LocalLabelVal)));
+}
+MCSymbol *MCContext::GetDirectionalLocalSymbol(int64_t LocalLabelVal,
+ int bORf) {
return GetOrCreateSymbol(Twine(MAI.getPrivateGlobalPrefix()) +
- "tmp" + Twine(NextUniqueID++));
+ Twine(LocalLabelVal) +
+ "\2" +
+ Twine(GetInstance(LocalLabelVal) + bORf));
}
MCSymbol *MCContext::LookupSymbol(StringRef Name) const {
getMachOSection(StringRef Segment, StringRef Section,
unsigned TypeAndAttributes,
unsigned Reserved2, SectionKind Kind) {
-
+
// We unique sections by their segment/section pair. The returned section
// may not have the same flags as the requested section, if so this should be
// diagnosed by the client as an error.
-
+
// Create the map if it doesn't already exist.
if (MachOUniquingMap == 0)
MachOUniquingMap = new MachOUniqueMapTy();
MachOUniqueMapTy &Map = *(MachOUniqueMapTy*)MachOUniquingMap;
-
+
// Form the name to look up.
SmallString<64> Name;
Name += Segment;
Name.push_back(',');
Name += Section;
-
+
// Do the lookup, if we have a hit, return it.
const MCSectionMachO *&Entry = Map[Name.str()];
if (Entry) return Entry;
-
+
// Otherwise, return a new section.
return Entry = new (*this) MCSectionMachO(Segment, Section, TypeAndAttributes,
Reserved2, Kind);
}
+const MCSectionELF *MCContext::
+getELFSection(StringRef Section, unsigned Type, unsigned Flags,
+ SectionKind Kind) {
+ return getELFSection(Section, Type, Flags, Kind, 0, "");
+}
-const MCSection *MCContext::
+const MCSectionELF *MCContext::
getELFSection(StringRef Section, unsigned Type, unsigned Flags,
- SectionKind Kind, bool IsExplicit) {
+ SectionKind Kind, unsigned EntrySize, StringRef Group) {
if (ELFUniquingMap == 0)
ELFUniquingMap = new ELFUniqueMapTy();
ELFUniqueMapTy &Map = *(ELFUniqueMapTy*)ELFUniquingMap;
-
+
// Do the lookup, if we have a hit, return it.
StringMapEntry<const MCSectionELF*> &Entry = Map.GetOrCreateValue(Section);
if (Entry.getValue()) return Entry.getValue();
-
+
+ // Possibly refine the entry size first.
+ if (!EntrySize) {
+ EntrySize = MCSectionELF::DetermineEntrySize(Kind);
+ }
+
+ MCSymbol *GroupSym = NULL;
+ if (!Group.empty())
+ GroupSym = GetOrCreateSymbol(Group);
+
MCSectionELF *Result = new (*this) MCSectionELF(Entry.getKey(), Type, Flags,
- Kind, IsExplicit);
+ Kind, EntrySize, GroupSym);
Entry.setValue(Result);
return Result;
}
+const MCSectionELF *MCContext::CreateELFGroupSection() {
+ MCSectionELF *Result =
+ new (*this) MCSectionELF(".group", ELF::SHT_GROUP, 0,
+ SectionKind::getReadOnly(), 4, NULL);
+ return Result;
+}
+
const MCSection *MCContext::getCOFFSection(StringRef Section,
unsigned Characteristics,
int Selection,
if (COFFUniquingMap == 0)
COFFUniquingMap = new COFFUniqueMapTy();
COFFUniqueMapTy &Map = *(COFFUniqueMapTy*)COFFUniquingMap;
-
+
// Do the lookup, if we have a hit, return it.
StringMapEntry<const MCSectionCOFF*> &Entry = Map.GetOrCreateValue(Section);
if (Entry.getValue()) return Entry.getValue();
-
+
MCSectionCOFF *Result = new (*this) MCSectionCOFF(Entry.getKey(),
Characteristics,
Selection, Kind);
-
+
Entry.setValue(Result);
return Result;
}
+
+//===----------------------------------------------------------------------===//
+// Dwarf Management
+//===----------------------------------------------------------------------===//
+
+/// GetDwarfFile - takes a file name an number to place in the dwarf file and
+/// directory tables. If the file number has already been allocated it is an
+/// error and zero is returned and the client reports the error, else the
+/// allocated file number is returned. The file numbers may be in any order.
+unsigned MCContext::GetDwarfFile(StringRef FileName, unsigned FileNumber) {
+ // TODO: a FileNumber of zero says to use the next available file number.
+ // Note: in GenericAsmParser::ParseDirectiveFile() FileNumber was checked
+ // to not be less than one. This needs to be change to be not less than zero.
+
+ // Make space for this FileNumber in the MCDwarfFiles vector if needed.
+ if (FileNumber >= MCDwarfFiles.size()) {
+ MCDwarfFiles.resize(FileNumber + 1);
+ } else {
+ MCDwarfFile *&ExistingFile = MCDwarfFiles[FileNumber];
+ if (ExistingFile)
+ // It is an error to use see the same number more than once.
+ return 0;
+ }
+
+ // Get the new MCDwarfFile slot for this FileNumber.
+ MCDwarfFile *&File = MCDwarfFiles[FileNumber];
+
+ // Separate the directory part from the basename of the FileName.
+ std::pair<StringRef, StringRef> Slash = FileName.rsplit('/');
+
+ // Find or make a entry in the MCDwarfDirs vector for this Directory.
+ StringRef Name;
+ unsigned DirIndex;
+ // Capture directory name.
+ if (Slash.second.empty()) {
+ Name = Slash.first;
+ DirIndex = 0; // For FileNames with no directories a DirIndex of 0 is used.
+ } else {
+ StringRef Directory = Slash.first;
+ Name = Slash.second;
+ for (DirIndex = 0; DirIndex < MCDwarfDirs.size(); DirIndex++) {
+ if (Directory == MCDwarfDirs[DirIndex])
+ break;
+ }
+ if (DirIndex >= MCDwarfDirs.size()) {
+ char *Buf = static_cast<char *>(Allocate(Directory.size()));
+ memcpy(Buf, Directory.data(), Directory.size());
+ MCDwarfDirs.push_back(StringRef(Buf, Directory.size()));
+ }
+ // The DirIndex is one based, as DirIndex of 0 is used for FileNames with
+ // no directories. MCDwarfDirs[] is unlike MCDwarfFiles[] in that the
+ // directory names are stored at MCDwarfDirs[DirIndex-1] where FileNames are
+ // stored at MCDwarfFiles[FileNumber].Name .
+ DirIndex++;
+ }
+
+ // Now make the MCDwarfFile entry and place it in the slot in the MCDwarfFiles
+ // vector.
+ char *Buf = static_cast<char *>(Allocate(Name.size()));
+ memcpy(Buf, Name.data(), Name.size());
+ File = new (*this) MCDwarfFile(StringRef(Buf, Name.size()), DirIndex);
+
+ // return the allocated FileNumber.
+ return FileNumber;
+}
+
+/// isValidDwarfFileNumber - takes a dwarf file number and returns true if it
+/// currently is assigned and false otherwise.
+bool MCContext::isValidDwarfFileNumber(unsigned FileNumber) {
+ if(FileNumber == 0 || FileNumber >= MCDwarfFiles.size())
+ return false;
+
+ return MCDwarfFiles[FileNumber] != 0;
+}