130 lines
4.1 KiB
C++
130 lines
4.1 KiB
C++
//===-- MachOEmitter.h - Target-independent Mach-O Emitter class ----------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef MACHOCODEEMITTER_H
|
|
#define MACHOCODEEMITTER_H
|
|
|
|
#include "MachOWriter.h"
|
|
#include "llvm/CodeGen/MachineCodeEmitter.h"
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
|
|
/// MachOCodeEmitter - This class is used by the MachOWriter to emit the code
|
|
/// for functions to the Mach-O file.
|
|
|
|
class MachOCodeEmitter : public MachineCodeEmitter {
|
|
MachOWriter &MOW;
|
|
|
|
/// Target machine description.
|
|
TargetMachine &TM;
|
|
|
|
/// is64Bit/isLittleEndian - This information is inferred from the target
|
|
/// machine directly, indicating what header values and flags to set.
|
|
bool is64Bit, isLittleEndian;
|
|
|
|
const TargetAsmInfo *TAI;
|
|
|
|
/// Relocations - These are the relocations that the function needs, as
|
|
/// emitted.
|
|
std::vector<MachineRelocation> Relocations;
|
|
|
|
/// CPLocations - This is a map of constant pool indices to offsets from the
|
|
/// start of the section for that constant pool index.
|
|
std::vector<uintptr_t> CPLocations;
|
|
|
|
/// CPSections - This is a map of constant pool indices to the MachOSection
|
|
/// containing the constant pool entry for that index.
|
|
std::vector<unsigned> CPSections;
|
|
|
|
/// JTLocations - This is a map of jump table indices to offsets from the
|
|
/// start of the section for that jump table index.
|
|
std::vector<uintptr_t> JTLocations;
|
|
|
|
/// MBBLocations - This vector is a mapping from MBB ID's to their address.
|
|
/// It is filled in by the StartMachineBasicBlock callback and queried by
|
|
/// the getMachineBasicBlockAddress callback.
|
|
std::vector<uintptr_t> MBBLocations;
|
|
|
|
public:
|
|
MachOCodeEmitter(MachOWriter &mow) : MOW(mow), TM(MOW.TM)
|
|
{
|
|
is64Bit = TM.getTargetData()->getPointerSizeInBits() == 64;
|
|
isLittleEndian = TM.getTargetData()->isLittleEndian();
|
|
TAI = TM.getTargetAsmInfo();
|
|
}
|
|
|
|
virtual void startFunction(MachineFunction &MF);
|
|
virtual bool finishFunction(MachineFunction &MF);
|
|
|
|
virtual void addRelocation(const MachineRelocation &MR) {
|
|
Relocations.push_back(MR);
|
|
}
|
|
|
|
void emitConstantPool(MachineConstantPool *MCP);
|
|
void emitJumpTables(MachineJumpTableInfo *MJTI);
|
|
|
|
virtual uintptr_t getConstantPoolEntryAddress(unsigned Index) const {
|
|
assert(CPLocations.size() > Index && "CP not emitted!");
|
|
return CPLocations[Index];
|
|
}
|
|
virtual uintptr_t getJumpTableEntryAddress(unsigned Index) const {
|
|
assert(JTLocations.size() > Index && "JT not emitted!");
|
|
return JTLocations[Index];
|
|
}
|
|
|
|
virtual void StartMachineBasicBlock(MachineBasicBlock *MBB) {
|
|
if (MBBLocations.size() <= (unsigned)MBB->getNumber())
|
|
MBBLocations.resize((MBB->getNumber()+1)*2);
|
|
MBBLocations[MBB->getNumber()] = getCurrentPCOffset();
|
|
}
|
|
|
|
virtual uintptr_t getMachineBasicBlockAddress(MachineBasicBlock *MBB) const {
|
|
assert(MBBLocations.size() > (unsigned)MBB->getNumber() &&
|
|
MBBLocations[MBB->getNumber()] && "MBB not emitted!");
|
|
return MBBLocations[MBB->getNumber()];
|
|
}
|
|
|
|
virtual uintptr_t getLabelAddress(uint64_t Label) const {
|
|
assert(0 && "get Label not implemented");
|
|
abort();
|
|
return 0;
|
|
}
|
|
|
|
virtual void emitLabel(uint64_t LabelID) {
|
|
assert(0 && "emit Label not implemented");
|
|
abort();
|
|
}
|
|
|
|
virtual void setModuleInfo(llvm::MachineModuleInfo* MMI) { }
|
|
|
|
/// JIT SPECIFIC FUNCTIONS - DO NOT IMPLEMENT THESE HERE!
|
|
virtual void startGVStub(const GlobalValue* F, unsigned StubSize,
|
|
unsigned Alignment = 1) {
|
|
assert(0 && "JIT specific function called!");
|
|
abort();
|
|
}
|
|
virtual void startGVStub(const GlobalValue* F, void *Buffer,
|
|
unsigned StubSize) {
|
|
assert(0 && "JIT specific function called!");
|
|
abort();
|
|
}
|
|
virtual void *finishGVStub(const GlobalValue* F) {
|
|
assert(0 && "JIT specific function called!");
|
|
abort();
|
|
return 0;
|
|
}
|
|
|
|
}; // end class MachOCodeEmitter
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|
|
|