debug.cpp

SFC游戏模拟器 snes9x 1.43 的原代码

/*******************************************************************************
  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
 
  (c) Copyright 1996 - 2002 Gary Henderson ([e-mail]) and
                            Jerremy Koot ([e-mail])

  (c) Copyright 2001 - 2004 John Weidman ([e-mail])

  (c) Copyright 2002 - 2004 Brad Jorsch ([e-mail]),
                            funkyass ([e-mail]),
                            Joel Yliluoma (http://iki.fi/bisqwit/)
                            Kris Bleakley ([e-mail]),
                            Matthew Kendora,
                            Nach ([e-mail]),
                            Peter Bortas ([e-mail]) and
                            zones ([e-mail])

  C4 x86 assembler and some C emulation code
  (c) Copyright 2000 - 2003 zsKnight ([e-mail]),
                            _Demo_ ([e-mail]), and Nach

  C4 C++ code
  (c) Copyright 2003 Brad Jorsch

  DSP-1 emulator code
  (c) Copyright 1998 - 2004 Ivar ([e-mail]), _Demo_, Gary Henderson,
                            John Weidman, neviksti ([e-mail]),
                            Kris Bleakley, Andreas Naive

  DSP-2 emulator code
  (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
                     Lord Nightmare ([e-mail]

  OBC1 emulator code
  (c) Copyright 2001 - 2004 zsKnight, pagefault ([e-mail]) and
                            Kris Bleakley
  Ported from x86 assembler to C by sanmaiwashi

  SPC7110 and RTC C++ emulator code
  (c) Copyright 2002 Matthew Kendora with research by
                     zsKnight, John Weidman, and Dark Force

  S-DD1 C emulator code
  (c) Copyright 2003 Brad Jorsch with research by
                     Andreas Naive and John Weidman
 
  S-RTC C emulator code
  (c) Copyright 2001 John Weidman
  
  ST010 C++ emulator code
  (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora

  Super FX x86 assembler emulator code 
  (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault 

  Super FX C emulator code 
  (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman


  SH assembler code partly based on x86 assembler code
  (c) Copyright 2002 - 2004 Marcus Comstedt ([e-mail]) 

 
  Specific ports contains the works of other authors. See headers in
  individual files.
 
  Snes9x homepage: http://www.snes9x.com
 
  Permission to use, copy, modify and distribute Snes9x in both binary and
  source form, for non-commercial purposes, is hereby granted without fee,
  providing that this license information and copyright notice appear with
  all copies and any derived work.
 
  This software is provided 'as-is', without any express or implied
  warranty. In no event shall the authors be held liable for any damages
  arising from the use of this software.
 
  Snes9x is freeware for PERSONAL USE only. Commercial users should
  seek permission of the copyright holders first. Commercial use includes
  charging money for Snes9x or software derived from Snes9x.
 
  The copyright holders request that bug fixes and improvements to the code
  should be forwarded to them so everyone can benefit from the modifications
  in future versions.
 
  Super NES and Super Nintendo Entertainment System are trademarks of
  Nintendo Co., Limited and its subsidiary companies.
*******************************************************************************/

#include <string.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif

#include "snes9x.h"
#include "memmap.h"
#include "cpuops.h"
#include "cheats.h"
#include "ppu.h"
#include "cpuexec.h"
#include "debug.h"
#include "missing.h"
#include "display.h"
#include "apu.h"
#include "sa1.h"
#include "spc7110.h"

#ifdef DEBUGGER
static void WhatsMissing ();
static void WhatsUsed ();
EXTERN_C SDMA DMA[8];
extern struct SCheatData Cheat;

#ifdef SPCTOOL
#include "spctool/spc700.h"
extern "C" void TraceSPC (unsigned char *PC, unsigned short YA, unsigned char X,
			  SPCFlags PS, unsigned char *SP);
#endif

FILE *trace = NULL;
FILE *trace2 = NULL;
struct SBreakPoint S9xBreakpoint[6];
struct SDebug
{
    struct
    {
	uint8 Bank;
	uint16 Address;
    } Dump;
    struct
    {
	uint8 Bank;
	uint16 Address;
    } Unassemble;
} Debug =
{
    {
	0, 0
    },
    {
	0, 0
    }
};
char *HelpMessage[] = {
    "Command Help:",
    "?                 - Shows this Command Help",
    "r                 - Shows the Registers",
    "i                 - Shows the interrupt vectors",
    "t                 - Trace current instruction   [Step-into]",
    "T                 - Toggle CPU instruction tracing to trace.log",
    "D                 - Toggle DMA tracing to stdout",
    "H                 - Toggle H-DMA tracing to stdout",
    "P		       - Toggle DSP tracing to stdout",
    "U                 - Toggle unknown register read/write tracing",
    "V                 - Toggle non-DMA V-RAM read/write tracing",
    "R                 - Reset ROM.",
    "p                 - Proceed to next instruction [Step-over]",
    "s                 - Skip to next instruction    [Skip]",
    "S                 - dump sprite (OBJ) status",
    "g [Address]       - Go or Go to [Address]",
    "u [Address]       - Disassemble from PC or [Address]",
    "d [Address]       - Dump from PC or [Address]",
    "bv [Number]       - View Breakpoints or View Breakpoint [Number]",
    "bs [Number] [Address] - Enable/Disable Breakpoint",
    "                        [Enable example: BS #2 $02:8002]",
    "                        [Disable example: BS #2]",
    "c		       - Dump SNES colour palette", 
    "W		       - Show what SNES hardware features a ROM is using",
    "			 which might not be implemented yet.",
    "w		       - Show some SNES hardware features used so far in this frame",
    "q		       - Quit emulator",
    "",
    "[Address]             - $Bank:Address or $Address",
    "                        [For example: $01:8123]",
    "[Number]              - #Number",
    "                        [For example: #1]",
    "a                 - Show Sound CPU status",
    "A                 - Toggle sound CPU instruction tracing to aputrace.log",
    "B                 - Toggle sound DSP register tracing",
    "C		       - Dump sound sample addresses",
    "ad [Address]      - Dump sound CPU RAM from PC or [Address]",
    "", NULL};

char *S9xMnemonics[256] = {
    "BRK", "ORA", "COP", "ORA", "TSB", "ORA", "ASL", "ORA",
    "PHP", "ORA", "ASL", "PHD", "TSB", "ORA", "ASL", "ORA",
    "BPL", "ORA", "ORA", "ORA", "TRB", "ORA", "ASL", "ORA",
    "CLC", "ORA", "INC", "TCS", "TRB", "ORA", "ASL", "ORA",
    "JSR", "AND", "JSL", "AND", "BIT", "AND", "ROL", "AND",
    "PLP", "AND", "ROL", "PLD", "BIT", "AND", "ROL", "AND",
    "BMI", "AND", "AND", "AND", "BIT", "AND", "ROL", "AND",
    "SEC", "AND", "DEC", "TSC", "BIT", "AND", "ROL", "AND",
    "RTI", "EOR", "DB ", "EOR", "MVP", "EOR", "LSR", "EOR",
    "PHA", "EOR", "LSR", "PHK", "JMP", "EOR", "LSR", "EOR",
    "BVC", "EOR", "EOR", "EOR", "MVN", "EOR", "LSR", "EOR",
    "CLI", "EOR", "PHY", "TCD", "JMP", "EOR", "LSR", "EOR",
    "RTS", "ADC", "PER", "ADC", "STZ", "ADC", "ROR", "ADC",
    "PLA", "ADC", "ROR", "RTL", "JMP", "ADC", "ROR", "ADC",
    "BVS", "ADC", "ADC", "ADC", "STZ", "ADC", "ROR", "ADC",
    "SEI", "ADC", "PLY", "TDC", "JMP", "ADC", "ROR", "ADC",
    "BRA", "STA", "BRL", "STA", "STY", "STA", "STX", "STA",
    "DEY", "BIT", "TXA", "PHB", "STY", "STA", "STX", "STA",
    "BCC", "STA", "STA", "STA", "STY", "STA", "STX", "STA",
    "TYA", "STA", "TXS", "TXY", "STZ", "STA", "STZ", "STA",
    "LDY", "LDA", "LDX", "LDA", "LDY", "LDA", "LDX", "LDA",
    "TAY", "LDA", "TAX", "PLB", "LDY", "LDA", "LDX", "LDA",
    "BCS", "LDA", "LDA", "LDA", "LDY", "LDA", "LDX", "LDA",
    "CLV", "LDA", "TSX", "TYX", "LDY", "LDA", "LDX", "LDA",
    "CPY", "CMP", "REP", "CMP", "CPY", "CMP", "DEC", "CMP",
    "INY", "CMP", "DEX", "WAI", "CPY", "CMP", "DEC", "CMP",
    "BNE", "CMP", "CMP", "CMP", "PEI", "CMP", "DEC", "CMP",
    "CLD", "CMP", "PHX", "STP", "JML", "CMP", "DEC", "CMP",
    "CPX", "SBC", "SEP", "SBC", "CPX", "SBC", "INC", "SBC",
    "INX", "SBC", "NOP", "XBA", "CPX", "SBC", "INC", "SBC",
    "BEQ", "SBC", "SBC", "SBC", "PEA", "SBC", "INC", "SBC",
    "SED", "SBC", "PLX", "XCE", "JSR", "SBC", "INC", "SBC"
};
int AddrModes[256] = {
  //0   1  2   3  4  5  6   7  8   9  A  B   C   D   E   F
    3, 10, 3, 19, 6, 6, 6, 12, 0,  1,24, 0, 14, 14, 14, 17, //0
    4, 11, 9, 20, 6, 7, 7, 13, 0, 16,24, 0, 14, 15, 15, 18, //1
   14, 10,17, 19, 6, 6, 6, 12, 0,  1,24, 0, 14, 14, 14, 17, //2
    4, 11, 9, 20, 7, 7, 7, 13, 0, 16,24, 0, 15, 15, 15, 18, //3
    0, 10, 3, 19, 25,6, 6, 12, 0,  1,24, 0, 14, 14, 14, 17, //4
    4, 11, 9, 20, 25,7, 7, 13, 0, 16, 0, 0, 17, 15, 15, 18, //5
    0, 10, 5, 19, 6, 6, 6, 12, 0,  1,24, 0, 21, 14, 14, 17, //6
    4, 11, 9, 20, 7, 7, 7, 13, 0, 16, 0, 0, 23, 15, 15, 18, //7
    4, 10, 5, 19, 6, 6, 6, 12, 0,  1, 0, 0, 14, 14, 14, 17, //8
    4, 11, 9, 20, 7, 7, 8, 13, 0, 16, 0, 0, 14, 15, 15, 18, //9
    2, 10, 2, 19, 6, 6, 6, 12, 0,  1, 0, 0, 14, 14, 14, 17, //A
    4, 11, 9, 20, 7, 7, 8, 13, 0, 16, 0, 0, 15, 15, 16, 18, //B
    2, 10, 3, 19, 6, 6, 6, 12, 0,  1, 0, 0, 14, 14, 14, 17, //C
    4, 11, 9,  9, 0, 7, 7, 13, 0, 16, 0, 0, 22, 15, 15, 18, //D
    2, 10, 3, 19, 6, 6, 6, 12, 0,  1, 0, 0, 14, 14, 14, 17, //E
    4, 11, 9, 20,14, 7, 7, 13, 0, 16, 0, 0, 23, 15, 15, 18  //F
};

uint8 S9xOPrint (char *Line, uint8 Bank, uint16 Address)
{
    uint8 S9xOpcode;
    uint8 Operant[3];
    uint16 Word;
    uint8 Byte;
    uint8 Size = 0;
    char SByte;
    short SWord;

#if 0
    sprintf (Line, "%04X%04X%04X%04X%02X%04X%c%c%c%c%c%c%c%c%c%03d%03d",
	     Registers.A.W, Registers.X.W, Registers.Y.W,
	     Registers.D.W, Registers.DB, Registers.S.W,
	     CheckEmulation () ? 'E' : 'e',
	     CheckNegative () ? 'N' : 'n',
	     CheckOverflow () ? 'V' : 'v',
	     CheckMemory () ? 'M' : 'm',
	     CheckIndex () ? 'X' : 'x',
	     CheckDecimal () ? 'D' : 'd',
	     CheckIRQ () ? 'I' : 'i',
	     CheckZero () ? 'Z' : 'z',
	     CheckCarry () ? 'C' : 'c',
	     CPU.Cycles,
	     CPU.V_Counter);
    return (0);

#else
    uint32 Cycles = CPU.Cycles;
    uint8 *WaitAddress = CPU.WaitAddress;

    S9xOpcode = S9xGetByte ((Bank << 16) + Address);
    sprintf (Line, "$%02X:%04X %02X ", Bank, Address, S9xOpcode);
    Operant[0] = S9xGetByte ((Bank << 16) + Address + 1);
    Operant[1] = S9xGetByte ((Bank << 16) + Address + 2);
    Operant[2] = S9xGetByte ((Bank << 16) + Address + 3);

    switch (AddrModes[S9xOpcode])
    {
    case 0:
	//Implied
	    sprintf (Line, "%s         %s", Line, S9xMnemonics[S9xOpcode]);
	Size = 1;
	break;
    case 1:
	//Immediate[MemoryFlag]
	    if (!CheckFlag (MemoryFlag))
	{
	    //Accumulator 16 - Bit
		sprintf (Line, "%s%02X %02X    %s #$%02X%02X",
			 Line,
			 Operant[0],
			 Operant[1],
			 S9xMnemonics[S9xOpcode],
			 Operant[1],
			 Operant[0]);
	    Size = 3;
	}
	else
	{
	    //Accumulator 8 - Bit
		sprintf (Line, "%s%02X       %s #$%02X",
			 Line,
			 Operant[0],
			 S9xMnemonics[S9xOpcode],
			 Operant[0]);
	    Size = 2;
	}
	break;
    case 2:
	//Immediate[IndexFlag]
	    if (!CheckFlag (IndexFlag))
	{
	    //X / Y 16 - Bit
		sprintf (Line, "%s%02X %02X    %s #$%02X%02X",
			 Line,
			 Operant[0],
			 Operant[1],
			 S9xMnemonics[S9xOpcode],
			 Operant[1],
			 Operant[0]);
	    Size = 3;
	}
	else
	{
	    //X / Y 8 - Bit
		sprintf (Line, "%s%02X       %s #$%02X",
			 Line,
			 Operant[0],
			 S9xMnemonics[S9xOpcode],
			 Operant[0]);
	    Size = 2;
	}
	break;
    case 3:
	//Immediate[Always 8 - Bit]
	    if (1)
	{
	    //Always 8 - Bit
		sprintf (Line, "%s%02X       %s #$%02X",
			 Line,
			 Operant[0],
			 S9xMnemonics[S9xOpcode],
			 Operant[0]);
	    Size = 2;
	}
	break;
    case 4:
	//Relative
	    sprintf (Line, "%s%02X       %s $%02X",
		     Line,
		     Operant[0],
		     S9xMnemonics[S9xOpcode],
		     Operant[0]);
	SByte = Operant[0];
	Word = Address;
	Word += SByte;
	Word += 2;
	sprintf (Line, "%-32s[$%04X]", Line, Word);
	Size = 2;
	break;
    case 5:
	//Relative Long
	    sprintf (Line, "%s%02X %02X    %s $%02X%02X",
		     Line,
		     Operant[0],
		     Operant[1],
		     S9xMnemonics[S9xOpcode],
		     Operant[1],
		     Operant[0]);
	SWord = (Operant[1] << 8) | Operant[0];
	Word = Address;
	Word += SWord;
	Word += 3;
	sprintf (Line, "%-32s[$%04X]", Line, Word);
	Size = 3;
	break;
    case 6:
	//Direct
	    sprintf (Line, "%s%02X       %s $%02X",
		     Line,
		     Operant[0],
		     S9xMnemonics[S9xOpcode],
		     Operant[0]);
	Word = Operant[0];
	Word += Registers.D.W;
	sprintf (Line, "%-32s[$00:%04X]", Line, Word);
	Size = 2;
	break;
    case 7:
	//Direct indexed (with x)
	    sprintf (Line, "%s%02X       %s $%02X,x",
		     Line,
		     Operant[0],
		     S9xMnemonics[S9xOpcode],
		     Operant[0]);
	Word = Operant[0];
	Word += Registers.D.W;
	Word += Registers.X.W;
	sprintf (Line, "%-32s[$00:%04X]", Line, Word);
	Size = 2;
	break;
    case 8:
	//Direct indexed (with y)
	    sprintf (Line, "%s%02X       %s $%02X,y",
		     Line,
		     Operant[0],
		     S9xMnemonics[S9xOpcode],
		     Operant[0]);
	Word = Operant[0];
	Word += Registers.D.W;
	Word += Registers.Y.W;
	sprintf (Line, "%-32s[$00:%04X]", Line, Word);
	Size = 2;
	break;
    case 9:
	//Direct Indirect
	    sprintf (Line, "%s%02X       %s ($%02X)",
		     Line,
		     Operant[0],
		     S9xMnemonics[S9xOpcode],
		     Operant[0]);
	Word = Operant[0];
	Word += Registers.D.W;
	Word = S9xGetWord (Word);
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Registers.DB, Word);
	Size = 2;
	break;
    case 10:
	//Direct Indexed Indirect
	    sprintf (Line, "%s%02X       %s ($%02X,x)",
		     Line,
		     Operant[0],
		     S9xMnemonics[S9xOpcode],
		     Operant[0]);
	Word = Operant[0];
	Word += Registers.D.W;
	Word += Registers.X.W;
	Word = S9xGetWord (Word);
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Registers.DB, Word);
	Size = 2;
	break;
    case 11:
	//Direct Indirect Indexed
	    sprintf (Line, "%s%02X       %s ($%02X),y",
		     Line,
		     Operant[0],
		     S9xMnemonics[S9xOpcode],
		     Operant[0]);
	Word = Operant[0];
	Word += Registers.D.W;
	Word = S9xGetWord (Word);
	Word += Registers.Y.W;
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Registers.DB, Word);
	Size = 2;
	break;
    case 12:
	//Direct Indirect Long
	    sprintf (Line, "%s%02X       %s [$%02X]",
		     Line,
		     Operant[0],
		     S9xMnemonics[S9xOpcode],
		     Operant[0]);
	Word = Operant[0];
	Word += Registers.D.W;
	Byte = S9xGetByte (Word + 2);
	Word = S9xGetWord (Word);
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Byte, Word);
	Size = 2;
	break;
    case 13:
	//Direct Indirect Indexed Long
	    sprintf (Line, "%s%02X       %s [$%02X],y",
		     Line,
		     Operant[0],
		     S9xMnemonics[S9xOpcode],
		     Operant[0]);
	Word = Operant[0];
	Word += Registers.D.W;
	Byte = S9xGetByte (Word + 2);
	Word = S9xGetWord (Word);
	Word += Registers.Y.W;
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Byte, Word);
	Size = 2;
	break;
    case 14:
	//Absolute
	    sprintf (Line, "%s%02X %02X    %s $%02X%02X",
		     Line,
		     Operant[0],
		     Operant[1],
		     S9xMnemonics[S9xOpcode],
		     Operant[1],
		     Operant[0]);
	Word = (Operant[1] << 8) | Operant[0];
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Registers.DB, Word);
	Size = 3;
	break;
    case 15:
	//Absolute Indexed (With X)
	    sprintf (Line, "%s%02X %02X    %s $%02X%02X,x",
		     Line,
		     Operant[0],
		     Operant[1],
		     S9xMnemonics[S9xOpcode],
		     Operant[1],
		     Operant[0]);
	Word = (Operant[1] << 8) | Operant[0];
	Word += Registers.X.W;
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Registers.DB, Word);
	Size = 3;
	break;
    case 16:
	//Absolute Indexed (With Y)
	    sprintf (Line, "%s%02X %02X    %s $%02X%02X,y",
		     Line,
		     Operant[0],
		     Operant[1],
		     S9xMnemonics[S9xOpcode],
		     Operant[1],
		     Operant[0]);
	Word = (Operant[1] << 8) | Operant[0];
	Word += Registers.Y.W;
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Registers.DB, Word);
	Size = 3;
	break;
    case 17:
	//Absolute long
	 sprintf (Line, "%s%02X %02X %02X %s $%02X%02X%02X",
		   Line,
		   Operant[0],
		   Operant[1],
		   Operant[2],
		   S9xMnemonics[S9xOpcode],
		   Operant[2],
		   Operant[1],
		   Operant[0]);
	Word = (Operant[1] << 8) | Operant[0];
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Operant[2], Word);
	Size = 4;
	break;
    case 18:
	//Absolute Indexed long
	 sprintf (Line, "%s%02X %02X %02X %s $%02X%02X%02X,x",
		   Line,
		   Operant[0],
		   Operant[1],
		   Operant[2],
		   S9xMnemonics[S9xOpcode],
		   Operant[2],
		   Operant[1],
		   Operant[0]);
	Word = (Operant[1] << 8) | Operant[0];
	Word += Registers.X.W;
	sprintf (Line, "%-32s[$%02X:%04X]", Line, Operant[2], Word);
	Size = 4;
	break;
    case 19:
	//StackRelative