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//===- ARMJITInfo.h - ARM 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 declaration of the ARMJITInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef ARMJITINFO_H
#define ARMJITINFO_H
#include "llvm/Target/TargetJITInfo.h"
#include <map>
namespace llvm {
class ARMTargetMachine;
class ARMJITInfo : public TargetJITInfo {
ARMTargetMachine &TM;
std::map<unsigned, intptr_t> CPIDtoAddressMap;
public:
explicit ARMJITInfo(ARMTargetMachine &tm) : TM(tm) { useGOT = false; }
/// 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);
/// 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);
/// 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);
/// hasCustomConstantPool - Allows a target to specify that constant
/// pool address resolution is handled by the target.
virtual bool hasCustomConstantPool() const { return true; }
/// getCustomConstantPoolEntryAddress - The ARM target puts all constant
/// pool entries into constant islands. Resolve the constant pool index
/// into the address where the constant is stored.
virtual intptr_t getCustomConstantPoolEntryAddress(unsigned CPID) const
{
std::map<unsigned, intptr_t>::const_iterator elem;
elem = CPIDtoAddressMap.find(CPID);
assert (elem != CPIDtoAddressMap.end());
return elem->second;
}
/// mapCPIDtoAddress - Map a Constant Pool Index (CPID) to the address
/// where its associated value is stored. When relocations are processed,
/// this value will be used to resolve references to the constant.
void mapCPIDtoAddress(unsigned CPID, intptr_t address)
{ CPIDtoAddressMap[CPID] = address; }
};
}
#endif
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