x86dis.h

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/* 
 *      HT Editor
 *      x86dis.h
 *
 *      Copyright (C) 1999-2002 Stefan Weyergraf (stefan@weyergraf.de)
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License version 2 as
 *      published by the Free Software Foundation.
 *
 *      This program 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 General Public License for more details.
 *
 *      You should have received a copy of the GNU General Public License
 *      along with this program; if not, write to the Free Software
 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __X86DIS_H__
#define __X86DIS_H__

#include "asm.h"
#include "x86opc.h"

#define X86DIS_OPCODE_CLASS_STD         0               /* no prefix */
#define X86DIS_OPCODE_CLASS_EXT         1               /* 0F */
#define X86DIS_OPCODE_CLASS_EXTEXT              2               /* 0F0F */

/* x86-specific styles */
#define X86DIS_STYLE_EXPLICIT_MEMSIZE   0x00000001              /* IF SET: mov word ptr [0000], ax      ELSE: mov [0000], ax */
#define X86DIS_STYLE_OPTIMIZE_ADDR              0x00000002              /* IF SET: mov [eax*3], ax                      ELSE: mov [eax+eax*2+00000000], ax */
/*#define X86DIS_STYLE_USE16                    0x00000004
#define X86DIS_STYLE_USE32                      0x00000008*/

struct x86dis_insn {
        bool invalid;
        char lockprefix;
        char repprefix;
        char segprefix;
        byte size;
        int opcode;
        int opcodeclass;
        int eopsize;
        int eaddrsize;
        char *name;
        x86_insn_op op[3];
};

/*
 *      CLASS x86dis
 */

class x86dis: public Disassembler {
public:
        int opsize, addrsize;
protected:
        x86dis_insn insn;
        char insnstr[256];
/* initme! */
        unsigned char *codep, *ocodep;
        int seg;
        int addr; // FIXME: int??
        byte c;
        int modrm;
        int sib;
        int maxlen;

/* new */
                        void decode_insn(x86opc_insn *insn);
                        void decode_modrm(x86_insn_op *op, char size, int allow_reg, int allow_mem, int mmx);
                        void decode_op(x86_insn_op *op, x86opc_insn_op *xop);
                        void decode_sib(x86_insn_op *op, int mod);
                        int esizeaddr(char c);
                        int esizeop(char c);
                        byte getbyte();
                        word getword();
                        dword getdword();
                        int getmodrm();
                        int getsib();
                        void invalidate();
                        int isfloat(char c);
                        void prefixes();
                        int special_param_ambiguity(x86dis_insn *disasm_insn);
                        void str_format(char **str, char **format, char *p, char *n, char *op[3], int oplen[3], char stopchar, int print);
        virtual void str_op(char *opstr, int *opstrlen, x86dis_insn *insn, x86_insn_op *op, bool explicit_params);
public:
        x86dis();
        x86dis(int opsize, int addrsize);
        virtual ~x86dis();

/* overwritten */
        virtual dis_insn *decode(byte *code, int maxlen, CPU_ADDR addr);
        virtual dis_insn *duplicateInsn(dis_insn *disasm_insn);
        virtual void getOpcodeMetrics(int &min_length, int &max_length, int &min_look_ahead, int &avg_look_ahead, int &addr_align);
        virtual char *getName();
        virtual byte getSize(dis_insn *disasm_insn);
                   int load(ht_object_stream *f);
        virtual OBJECT_ID object_id() const;
        virtual char *str(dis_insn *disasm_insn, int options);
        virtual char *strf(dis_insn *disasm_insn, int options, char *format);
        virtual void store(ht_object_stream *f);
        virtual bool validInsn(dis_insn *disasm_insn);
};

class x86dis_vxd: public x86dis {
protected:
        virtual void str_op(char *opstr, int *opstrlen, x86dis_insn *insn, x86_insn_op *op, bool explicit_params);
public:
        x86dis_vxd();
        x86dis_vxd(int opsize, int addrsize);
        virtual ~x86dis_vxd();

        virtual dis_insn *decode(byte *code, byte maxlen, CPU_ADDR addr);
        virtual OBJECT_ID object_id() const;
};

#endif /* __X86DIS_H__ */

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