emit-aarch64.h

/*
 * See the dyninst/COPYRIGHT file for copyright information.
 * 
 * We provide the Paradyn Tools (below described as "Paradyn")
 * on an AS IS basis, and do not warrant its validity or performance.
 * We reserve the right to update, modify, or discontinue this
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 * updates or modifications or any other form of support to you.
 * 
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 * other person or entity with proprietary rights in Paradyn) are
 * under no obligation to provide either maintenance services,
 * update services, notices of latent defects, or correction of
 * defects for Paradyn.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */


#ifndef _EMITTER_AARCH64_H
#define _EMITTER_AARCH64_H

#include "common/src/headers.h"
#include "dyninstAPI/src/instPoint.h"
#include "dyninstAPI/src/baseTramp.h"
#include "dyninstAPI/src/ast.h"

#include "dyninstAPI/src/emitter.h"

class codeGen;

class registerSpace;

class baseTramp;

// class for encapsulating
// platform dependent code generation functions
class EmitterAARCH64 : public Emitter {

public:
    virtual ~EmitterAARCH64() {};

    virtual codeBufIndex_t emitIf(Register, Register, RegControl, codeGen &);

    virtual void emitOp(unsigned, Register, Register, Register, codeGen &);

    virtual void emitOpImm(unsigned, unsigned, Register, Register, RegValue,
                           codeGen &) { assert(0); }

    virtual void emitRelOp(unsigned, Register, Register, Register, codeGen &);

    virtual void emitRelOpImm(unsigned, Register, Register, RegValue, codeGen &) { assert(0); }

    virtual void emitDiv(Register, Register, Register, codeGen &) { assert(0); }

    virtual void emitTimesImm(Register, Register, RegValue, codeGen &) { assert(0); }

    virtual void emitDivImm(Register, Register, RegValue, codeGen &) { assert(0); }

    virtual void emitLoad(Register, Address, int, codeGen &);

    virtual void emitLoadConst(Register, Address, codeGen &);

    virtual void emitLoadIndir(Register, Register, int, codeGen &) { assert(0); }

    virtual bool emitCallRelative(Register, Address, Register, codeGen &);

    virtual bool emitLoadRelative(Register, Address, Register, int, codeGen &);

    virtual void
    emitLoadShared(opCode op, Register dest, const image_variable *var, bool is_local, int size, codeGen &gen,
                   Address offset);

    virtual void emitLoadFrameAddr(Register, Address, codeGen &) { assert(0); }

    // These implicitly use the stored original/non-inst value
    virtual void emitLoadOrigFrameRelative(Register, Address, codeGen &) { assert(0); }

    virtual void emitLoadOrigRegRelative(Register, Address, Register, codeGen &, bool) { assert(0); }

    virtual void emitLoadOrigRegister(Address, Register, codeGen &) { assert(0); }

    virtual void emitStore(Address, Register, int, codeGen &);

    virtual void emitStoreIndir(Register, Register, int, codeGen &) { assert(0); }

    virtual void emitStoreFrameRelative(Address, Register, Register, int, codeGen &) { assert(0); }

    virtual void emitStoreRelative(Register, Address, Register, int, codeGen &);

    virtual void emitStoreShared(Register source, const image_variable *var, bool is_local, int size, codeGen &gen);


    virtual void emitStoreOrigRegister(Address, Register, codeGen &) { assert(0); }

    virtual bool emitMoveRegToReg(Register, Register, codeGen &) {
        assert(0);
        return 0;
    }

    virtual bool emitMoveRegToReg(registerSlot *src, registerSlot *dest, codeGen &gen);

    virtual Address emitMovePCToReg(Register, codeGen &gen);

    // This one we actually use now.
    virtual Register emitCall(opCode, codeGen &, const pdvector <AstNodePtr> &,
                              bool, func_instance *);
    //virtual bool emitPIC(codeGen& /*gen*/, Address, Address )=0;

    virtual void emitGetRetVal(Register, bool, codeGen &) { assert(0); }

    virtual void emitGetRetAddr(Register, codeGen &) { assert(0); }

    virtual void emitGetParam(Register, Register, instPoint::Type, opCode, bool, codeGen &);

    virtual void emitASload(int, int, int, long, Register, int, codeGen &) { assert(0); }

    virtual void emitCSload(int, int, int, long, Register, codeGen &) { assert(0); }

    virtual void emitPushFlags(codeGen &) { assert(0); }

    virtual void emitRestoreFlags(codeGen &, unsigned) { assert(0); }

    // Built-in offset...
    virtual void emitRestoreFlagsFromStackSlot(codeGen &) { assert(0); }

    virtual bool emitBTSaves(baseTramp *, codeGen &) {
        assert(0);
        return true;
    }

    virtual bool emitBTRestores(baseTramp *, codeGen &) {
        assert(0);
        return true;
    }

    virtual void emitStoreImm(Address, int, codeGen &, bool) { assert(0); }

    virtual void emitAddSignedImm(Address, int, codeGen &, bool) { assert(0); }

    virtual int Register_DWARFtoMachineEnc(int) {
        assert(0);
        return 0;
    }

    virtual bool emitPush(codeGen &, Register) {
        assert(0);
        return true;
    }

    virtual bool emitPop(codeGen &, Register) {
        assert(0);
        return true;
    }

    virtual bool emitAdjustStackPointer(int, codeGen &) {
        assert(0);
        return true;
    }

    virtual bool clobberAllFuncCall(registerSpace *rs, func_instance *callee);

protected:
    virtual bool emitCallInstruction(codeGen &, func_instance *,
                                     bool, Address);

    virtual Register emitCallReplacement(opCode, codeGen &, bool,
                                         func_instance *);
};

class EmitterAARCH64Dyn : public EmitterAARCH64 {
public:
    virtual bool emitTOCCall(block_instance *dest, codeGen &gen) { return emitTOCCommon(dest, true, gen); }

    virtual bool emitTOCJump(block_instance *dest, codeGen &gen) { return emitTOCCommon(dest, false, gen); }

    virtual ~EmitterAARCH64Dyn() {}

private:
    bool emitTOCCommon(block_instance *dest, bool call, codeGen &gen);

};

class EmitterAARCH64Stat : public EmitterAARCH64 {
public:
    virtual ~EmitterAARCH64Stat() {}

    virtual bool emitPLTCall(func_instance *dest, codeGen &gen);

    virtual bool emitPLTJump(func_instance *dest, codeGen &gen);

    virtual bool emitTOCCall(block_instance *dest, codeGen &gen);

    virtual bool emitTOCJump(block_instance *dest, codeGen &gen);

protected:
    virtual bool emitCallInstruction(codeGen &, func_instance *, bool,
                                     Address);

    virtual Register emitCallReplacement(opCode, codeGen &, bool,
                                         func_instance *) {
        assert(0 && "emitCallReplacement not implemented for binary rewriter");
    }

private:
    bool emitPLTCommon(func_instance *dest, bool call, codeGen &gen);

    bool emitTOCCommon(block_instance *dest, bool call, codeGen &gen);
};

class EmitterAARCH64SaveRegs {
public:
    virtual ~EmitterAARCH64SaveRegs() {}

    unsigned saveGPRegisters(baseTramp *bt, codeGen &gen, registerSpace *theRegSpace, int &offset, int numReqGPRs = -1);

    unsigned saveFPRegisters(codeGen &gen, registerSpace *theRegSpace, int &offset);

    unsigned saveSPRegisters(codeGen &gen, registerSpace *, int &offset, bool force_save);

    void createFrame(codeGen &gen);

private:
    void saveSPR(codeGen &gen, Register scratchReg, int sprnum, int stkOffset);

    void saveRegister(codeGen &gen, Register reg, int save_off);

    void saveFPRegister(codeGen &gen, Register reg, int save_off);
};

class EmitterAARCH64RestoreRegs {
public:
    virtual ~EmitterAARCH64RestoreRegs() {}

    unsigned restoreGPRegisters(codeGen &gen, registerSpace *theRegSpace);

    unsigned restoreFPRegisters(codeGen &gen, registerSpace *theRegSpace);

    unsigned restoreSPRegisters(codeGen &gen, registerSpace *, int force_save);

    void tearFrame(codeGen &gen);

private:
    void restoreSPR(codeGen &gen, Register scratchReg, int sprnum, int stkOffset);

    void restoreRegister(codeGen &gen, Register reg, int save_off);

    void restoreFPRegister(codeGen &gen, Register reg, int save_off);
};

#endif