mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
6b2e257e74
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111172 91177308-0d34-0410-b5e6-96231b3b80d8
250 lines
9.1 KiB
C++
250 lines
9.1 KiB
C++
//===- lib/MC/MCContext.cpp - Machine Code Context ------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/MC/MCSectionMachO.h"
|
|
#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/ADT/SmallString.h"
|
|
#include "llvm/ADT/Twine.h"
|
|
using namespace llvm;
|
|
|
|
typedef StringMap<const MCSectionMachO*> MachOUniqueMapTy;
|
|
typedef StringMap<const MCSectionELF*> ELFUniqueMapTy;
|
|
typedef StringMap<const MCSectionCOFF*> COFFUniqueMapTy;
|
|
|
|
|
|
MCContext::MCContext(const MCAsmInfo &mai) : MAI(mai), NextUniqueID(0) {
|
|
MachOUniquingMap = 0;
|
|
ELFUniquingMap = 0;
|
|
COFFUniquingMap = 0;
|
|
|
|
SecureLogFile = getenv("AS_SECURE_LOG_FILE");
|
|
SecureLog = 0;
|
|
SecureLogUsed = 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;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Symbol Manipulation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
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();
|
|
|
|
// 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;
|
|
}
|
|
|
|
MCSymbol *MCContext::GetOrCreateSymbol(const Twine &Name) {
|
|
SmallString<128> NameSV;
|
|
Name.toVector(NameSV);
|
|
return GetOrCreateSymbol(NameSV.str());
|
|
}
|
|
|
|
MCSymbol *MCContext::CreateTempSymbol() {
|
|
return GetOrCreateSymbol(Twine(MAI.getPrivateGlobalPrefix()) +
|
|
"tmp" + Twine(NextUniqueID++));
|
|
}
|
|
|
|
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()) +
|
|
Twine(LocalLabelVal) +
|
|
"\2" +
|
|
Twine(GetInstance(LocalLabelVal) + bORf));
|
|
}
|
|
|
|
MCSymbol *MCContext::LookupSymbol(StringRef Name) const {
|
|
return Symbols.lookup(Name);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Section Management
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
const MCSectionMachO *MCContext::
|
|
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 MCSection *MCContext::
|
|
getELFSection(StringRef Section, unsigned Type, unsigned Flags,
|
|
SectionKind Kind, bool IsExplicit, unsigned EntrySize) {
|
|
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();
|
|
|
|
MCSectionELF *Result = new (*this) MCSectionELF(Entry.getKey(), Type, Flags,
|
|
Kind, IsExplicit, EntrySize);
|
|
Entry.setValue(Result);
|
|
return Result;
|
|
}
|
|
|
|
const MCSection *MCContext::getCOFFSection(StringRef Section,
|
|
unsigned Characteristics,
|
|
int Selection,
|
|
SectionKind Kind) {
|
|
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;
|
|
}
|