mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
235 lines
9.0 KiB
C++
235 lines
9.0 KiB
C++
//===- MCContext.h - Machine Code Context -----------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_MCCONTEXT_H
|
|
#define LLVM_MC_MCCONTEXT_H
|
|
|
|
#include "llvm/MC/SectionKind.h"
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include "llvm/ADT/StringMap.h"
|
|
#include "llvm/Support/Allocator.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
namespace llvm {
|
|
class MCAsmInfo;
|
|
class MCExpr;
|
|
class MCSection;
|
|
class MCSymbol;
|
|
class MCLabel;
|
|
class StringRef;
|
|
class Twine;
|
|
class MCSectionMachO;
|
|
|
|
/// MCContext - Context object for machine code objects. This class owns all
|
|
/// of the sections that it creates.
|
|
///
|
|
class MCContext {
|
|
MCContext(const MCContext&); // DO NOT IMPLEMENT
|
|
MCContext &operator=(const MCContext&); // DO NOT IMPLEMENT
|
|
|
|
/// The MCAsmInfo for this target.
|
|
const MCAsmInfo &MAI;
|
|
|
|
/// Sections - Bindings of names to allocated sections.
|
|
StringMap<MCSection*> Sections;
|
|
|
|
/// Symbols - Bindings of names to symbols.
|
|
StringMap<MCSymbol*> Symbols;
|
|
|
|
/// NextUniqueID - The next ID to dole out to an unnamed assembler temporary
|
|
/// symbol.
|
|
unsigned NextUniqueID;
|
|
|
|
/// Instances of directional local labels.
|
|
DenseMap<unsigned, MCLabel *> Instances;
|
|
/// NextInstance() creates the next instance of the directional local label
|
|
/// for the LocalLabelVal and adds it to the map if needed.
|
|
unsigned NextInstance(int64_t LocalLabelVal);
|
|
/// GetInstance() gets the current instance of the directional local label
|
|
/// for the LocalLabelVal and adds it to the map if needed.
|
|
unsigned GetInstance(int64_t LocalLabelVal);
|
|
|
|
/// The file name of the log file from the enviromment variable
|
|
/// AS_SECURE_LOG_FILE. Which must be set before the .secure_log_unique
|
|
/// directive is used or it is an error.
|
|
char *SecureLogFile;
|
|
/// The stream that gets written to for the .secure_log_unique directive.
|
|
raw_ostream *SecureLog;
|
|
/// Boolean toggled when .secure_log_unique / .secure_log_reset is seen to
|
|
/// catch errors if .secure_log_unique appears twice without
|
|
/// .secure_log_reset appearing between them.
|
|
bool SecureLogUsed;
|
|
|
|
/// Allocator - Allocator object used for creating machine code objects.
|
|
///
|
|
/// We use a bump pointer allocator to avoid the need to track all allocated
|
|
/// objects.
|
|
BumpPtrAllocator Allocator;
|
|
|
|
void *MachOUniquingMap, *ELFUniquingMap, *COFFUniquingMap;
|
|
public:
|
|
explicit MCContext(const MCAsmInfo &MAI);
|
|
~MCContext();
|
|
|
|
const MCAsmInfo &getAsmInfo() const { return MAI; }
|
|
|
|
/// @name Symbol Managment
|
|
/// @{
|
|
|
|
/// CreateTempSymbol - Create and return a new assembler temporary symbol
|
|
/// with a unique but unspecified name.
|
|
MCSymbol *CreateTempSymbol();
|
|
|
|
/// CreateDirectionalLocalSymbol - Create the defintion of a directional
|
|
/// local symbol for numbered label (used for "1:" defintions).
|
|
MCSymbol *CreateDirectionalLocalSymbol(int64_t LocalLabelVal);
|
|
|
|
/// GetDirectionalLocalSymbol - Create and return a directional local
|
|
/// symbol for numbered label (used for "1b" or 1f" references).
|
|
MCSymbol *GetDirectionalLocalSymbol(int64_t LocalLabelVal, int bORf);
|
|
|
|
/// GetOrCreateSymbol - Lookup the symbol inside with the specified
|
|
/// @p Name. If it exists, return it. If not, create a forward
|
|
/// reference and return it.
|
|
///
|
|
/// @param Name - The symbol name, which must be unique across all symbols.
|
|
MCSymbol *GetOrCreateSymbol(StringRef Name);
|
|
MCSymbol *GetOrCreateSymbol(const Twine &Name);
|
|
|
|
/// LookupSymbol - Get the symbol for \p Name, or null.
|
|
MCSymbol *LookupSymbol(StringRef Name) const;
|
|
|
|
/// @}
|
|
|
|
/// @name Section Managment
|
|
/// @{
|
|
|
|
/// getMachOSection - Return the MCSection for the specified mach-o section.
|
|
/// This requires the operands to be valid.
|
|
const MCSectionMachO *getMachOSection(StringRef Segment,
|
|
StringRef Section,
|
|
unsigned TypeAndAttributes,
|
|
unsigned Reserved2,
|
|
SectionKind K);
|
|
const MCSectionMachO *getMachOSection(StringRef Segment,
|
|
StringRef Section,
|
|
unsigned TypeAndAttributes,
|
|
SectionKind K) {
|
|
return getMachOSection(Segment, Section, TypeAndAttributes, 0, K);
|
|
}
|
|
|
|
const MCSection *getELFSection(StringRef Section, unsigned Type,
|
|
unsigned Flags, SectionKind Kind,
|
|
bool IsExplicit = false);
|
|
|
|
const MCSection *getCOFFSection(StringRef Section, unsigned Characteristics,
|
|
int Selection, SectionKind Kind);
|
|
|
|
const MCSection *getCOFFSection(StringRef Section, unsigned Characteristics,
|
|
SectionKind Kind) {
|
|
return getCOFFSection (Section, Characteristics, 0, Kind);
|
|
}
|
|
|
|
|
|
/// @}
|
|
|
|
char *getSecureLogFile() { return SecureLogFile; }
|
|
raw_ostream *getSecureLog() { return SecureLog; }
|
|
bool getSecureLogUsed() { return SecureLogUsed; }
|
|
void setSecureLog(raw_ostream *Value) {
|
|
SecureLog = Value;
|
|
}
|
|
void setSecureLogUsed(bool Value) {
|
|
SecureLogUsed = Value;
|
|
}
|
|
|
|
void *Allocate(unsigned Size, unsigned Align = 8) {
|
|
return Allocator.Allocate(Size, Align);
|
|
}
|
|
void Deallocate(void *Ptr) {
|
|
}
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
// operator new and delete aren't allowed inside namespaces.
|
|
// The throw specifications are mandated by the standard.
|
|
/// @brief Placement new for using the MCContext's allocator.
|
|
///
|
|
/// This placement form of operator new uses the MCContext's allocator for
|
|
/// obtaining memory. It is a non-throwing new, which means that it returns
|
|
/// null on error. (If that is what the allocator does. The current does, so if
|
|
/// this ever changes, this operator will have to be changed, too.)
|
|
/// Usage looks like this (assuming there's an MCContext 'Context' in scope):
|
|
/// @code
|
|
/// // Default alignment (16)
|
|
/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments);
|
|
/// // Specific alignment
|
|
/// IntegerLiteral *Ex2 = new (Context, 8) IntegerLiteral(arguments);
|
|
/// @endcode
|
|
/// Please note that you cannot use delete on the pointer; it must be
|
|
/// deallocated using an explicit destructor call followed by
|
|
/// @c Context.Deallocate(Ptr).
|
|
///
|
|
/// @param Bytes The number of bytes to allocate. Calculated by the compiler.
|
|
/// @param C The MCContext that provides the allocator.
|
|
/// @param Alignment The alignment of the allocated memory (if the underlying
|
|
/// allocator supports it).
|
|
/// @return The allocated memory. Could be NULL.
|
|
inline void *operator new(size_t Bytes, llvm::MCContext &C,
|
|
size_t Alignment = 16) throw () {
|
|
return C.Allocate(Bytes, Alignment);
|
|
}
|
|
/// @brief Placement delete companion to the new above.
|
|
///
|
|
/// This operator is just a companion to the new above. There is no way of
|
|
/// invoking it directly; see the new operator for more details. This operator
|
|
/// is called implicitly by the compiler if a placement new expression using
|
|
/// the MCContext throws in the object constructor.
|
|
inline void operator delete(void *Ptr, llvm::MCContext &C, size_t)
|
|
throw () {
|
|
C.Deallocate(Ptr);
|
|
}
|
|
|
|
/// This placement form of operator new[] uses the MCContext's allocator for
|
|
/// obtaining memory. It is a non-throwing new[], which means that it returns
|
|
/// null on error.
|
|
/// Usage looks like this (assuming there's an MCContext 'Context' in scope):
|
|
/// @code
|
|
/// // Default alignment (16)
|
|
/// char *data = new (Context) char[10];
|
|
/// // Specific alignment
|
|
/// char *data = new (Context, 8) char[10];
|
|
/// @endcode
|
|
/// Please note that you cannot use delete on the pointer; it must be
|
|
/// deallocated using an explicit destructor call followed by
|
|
/// @c Context.Deallocate(Ptr).
|
|
///
|
|
/// @param Bytes The number of bytes to allocate. Calculated by the compiler.
|
|
/// @param C The MCContext that provides the allocator.
|
|
/// @param Alignment The alignment of the allocated memory (if the underlying
|
|
/// allocator supports it).
|
|
/// @return The allocated memory. Could be NULL.
|
|
inline void *operator new[](size_t Bytes, llvm::MCContext& C,
|
|
size_t Alignment = 16) throw () {
|
|
return C.Allocate(Bytes, Alignment);
|
|
}
|
|
|
|
/// @brief Placement delete[] companion to the new[] above.
|
|
///
|
|
/// This operator is just a companion to the new[] above. There is no way of
|
|
/// invoking it directly; see the new[] operator for more details. This operator
|
|
/// is called implicitly by the compiler if a placement new[] expression using
|
|
/// the MCContext throws in the object constructor.
|
|
inline void operator delete[](void *Ptr, llvm::MCContext &C) throw () {
|
|
C.Deallocate(Ptr);
|
|
}
|
|
|
|
#endif
|