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//===- X86JITInfo.h - X86 implementation of the JIT interface --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the X86 implementation of the TargetJITInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef X86JITINFO_H
#define X86JITINFO_H
#include "llvm/Function.h"
#include "llvm/Target/TargetJITInfo.h"
namespace llvm {
class X86TargetMachine;
class X86JITInfo : public TargetJITInfo {
X86TargetMachine &TM;
intptr_t PICBase;
public:
explicit X86JITInfo(X86TargetMachine &tm) : TM(tm) {useGOT = 0;}
/// replaceMachineCodeForFunction - Make it so that calling the function
/// whose machine code is at OLD turns into a call to NEW, perhaps by
/// overwriting OLD with a branch to NEW. This is used for self-modifying
/// code.
///
virtual void replaceMachineCodeForFunction(void *Old, void *New);
/// emitGlobalValueLazyPtr - Use the specified MachineCodeEmitter object to
/// emit a lazy pointer which contains the address of the specified ptr.
virtual void *emitGlobalValueLazyPtr(const GlobalValue* GV, void *ptr,
MachineCodeEmitter &MCE);
/// emitFunctionStub - Use the specified MachineCodeEmitter object to emit a
/// small native function that simply calls the function at the specified
/// address.
virtual void *emitFunctionStub(const Function* F, void *Fn,
MachineCodeEmitter &MCE);
/// getPICJumpTableEntry - Returns the value of the jumptable entry for the
/// specific basic block.
virtual intptr_t getPICJumpTableEntry(intptr_t BB, intptr_t JTBase);
/// getLazyResolverFunction - Expose the lazy resolver to the JIT.
virtual LazyResolverFn getLazyResolverFunction(JITCompilerFn);
/// relocate - Before the JIT can run a block of code that has been emitted,
/// it must rewrite the code to contain the actual addresses of any
/// referenced global symbols.
virtual void relocate(void *Function, MachineRelocation *MR,
unsigned NumRelocs, unsigned char* GOTBase);
/// setPICBase / getPICBase - Getter / setter of PICBase, used to compute
/// PIC jumptable entry.
void setPICBase(intptr_t Base) { PICBase = Base; }
intptr_t getPICBase() const { return PICBase; }
};
}
#endif
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