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/***************************************************************************
didisasm.h
Device disassembly interfaces.
****************************************************************************
Copyright Aaron Giles
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name 'MAME' nor the names of its contributors may be
used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY AARON GILES ''AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL AARON GILES BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
#pragma once
#ifndef __EMU_H__
#error Dont include this file directly; include emu.h instead.
#endif
#ifndef __DIDISASM_H__
#define __DIDISASM_H__
//**************************************************************************
// CONSTANTS
//**************************************************************************
// Disassembler constants
const UINT32 DASMFLAG_SUPPORTED = 0x80000000; // are disassembly flags supported?
const UINT32 DASMFLAG_STEP_OUT = 0x40000000; // this instruction should be the end of a step out sequence
const UINT32 DASMFLAG_STEP_OVER = 0x20000000; // this instruction should be stepped over by setting a breakpoint afterwards
const UINT32 DASMFLAG_OVERINSTMASK = 0x18000000; // number of extra instructions to skip when stepping over
const UINT32 DASMFLAG_OVERINSTSHIFT = 27; // bits to shift after masking to get the value
const UINT32 DASMFLAG_LENGTHMASK = 0x0000ffff; // the low 16-bits contain the actual length
//**************************************************************************
// MACROS
//**************************************************************************
#define DASMFLAG_STEP_OVER_EXTRA(x) ((x) << DASMFLAG_OVERINSTSHIFT)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> device_disasm_interface
// class representing interface-specific live disasm
class device_disasm_interface : public device_interface
{
public:
// construction/destruction
device_disasm_interface(const machine_config &mconfig, device_t &device);
virtual ~device_disasm_interface();
// configuration access
UINT32 min_opcode_bytes() const { return disasm_min_opcode_bytes(); }
UINT32 max_opcode_bytes() const { return disasm_max_opcode_bytes(); }
// interface for disassembly
offs_t disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options = 0) { return disasm_disassemble(buffer, pc, oprom, opram, options); }
protected:
// required operation overrides
virtual UINT32 disasm_min_opcode_bytes() const = 0;
virtual UINT32 disasm_max_opcode_bytes() const = 0;
virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options) = 0;
};
// iterator
typedef device_interface_iterator<device_disasm_interface> disasm_interface_iterator;
#endif /* __DIDISASM_H__ */
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