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fceugx/source/fceultra/debug.c
dborth 47fb364fc0 source refactor
2008-09-02 01:55:12 +00:00

521 lines
13 KiB
C
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/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2003 Xodnizel
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "types.h"
#include "x6502.h"
#include "fceu.h"
#include "debug.h"
void FCEUI_DumpMem(const char *fname, uint32 start, uint32 end)
{
FILE *fp=FCEUD_UTF8fopen(fname,"wb");
fceuindbg=1;
for(;start<=end;start++)
fputc(ARead[start](start),fp);
fclose(fp);
fceuindbg=0;
}
void FCEUI_LoadMem(const char *fname, uint32 start, int hl)
{
int t;
FILE *fp=FCEUD_UTF8fopen(fname,"rb");
while((t=fgetc(fp))>=0)
{
if(start>0xFFFF) break;
if(hl)
{
extern uint8 *Page[32];
if(Page[start/2048])
Page[start/2048][start]=t;
}
else
BWrite[start](start,t);
start++;
}
fclose(fp);
}
static char *fstrings[12]=
{
"#$%02X", // immediate
"$%04X", // RELATIVE(jump)
"$%02X", // Z
"$%02X,X", // Z,x
"$%02X,Y", // Z,y
"$%04X", //ABS
"$%04X,X", // ABS,x
"$%04X,Y", // ABS,y
"($%04X)", // IND
"($%02X,X)", // INX
"($%02X),Y", // INY
""
};
static int flengths[12]={1,1,1,1,1,2,2,2,2,1,1,0};
#define IMD(x) ((0<<16)|x)
#define REL(x) ((1<<16)|x)
#define ZP(x) ((2<<16)|x)
#define ZPX(x) ((3<<16)|x)
#define ZPY(x) ((4<<16)|x)
#define ABS(x) ((5<<16)|x)
#define ABX(x) ((6<<16)|x)
#define ABY(x) ((7<<16)|x)
#define IND(x) ((8<<16)|x)
#define INX(x) ((9<<16)|x)
#define INY(x) ((10<<16)|x)
#define IMP(x) ((11<<16)|x)
typedef struct {
char *name;
int type; /* 1 for read, 2 for write, 3 for r then write. */
int32 modes[10];
} OPS;
#define NUMOPS 56
static OPS optable[NUMOPS]=
{
{"BRK",0,{IMP(0x00),-1}},
{"RTI",0,{IMP(0x40),-1}},
{"RTS",0,{IMP(0x60),-1}},
{"PHA",2,{IMP(0x48),-1}},
{"PHP",2,{IMP(0x08),-1}},
{"PLA",1,{IMP(0x68),-1}},
{"PLP",1,{IMP(0x28),-1}},
{"JMP",0,{ABS(0x4C),IND(0x6C),-1}},
{"JSR",0,{ABS(0x20),-1}},
{"TAX",0,{IMP(0xAA),-1}},
{"TXA",0,{IMP(0x8A),-1}},
{"TAY",0,{IMP(0xA8),-1}},
{"TYA",0,{IMP(0x98),-1}},
{"TSX",0,{IMP(0xBA),-1}},
{"TXS",0,{IMP(0x9A),-1}},
{"DEX",0,{IMP(0xCA),-1}},
{"DEY",0,{IMP(0x88),-1}},
{"INX",0,{IMP(0xE8),-1}},
{"INY",0,{IMP(0xC8),-1}},
{"CLC",0,{IMP(0x18),-1}},
{"CLD",0,{IMP(0xD8),-1}},
{"CLI",0,{IMP(0x58),-1}},
{"CLV",0,{IMP(0xB8),-1}},
{"SEC",0,{IMP(0x38),-1}},
{"SED",0,{IMP(0xF8),-1}},
{"SEI",0,{IMP(0x78),-1}},
{"NOP",0,{IMP(0xEA),-1}},
{"ASL",1,{IMP(0x0a),ZP(0x06),ZPX(0x16),ABS(0x0E),ABX(0x1E),-1}},
{"DEC",3,{ZP(0xc6),ZPX(0xd6),ABS(0xcE),ABX(0xdE),-1}},
{"INC",3,{ZP(0xe6),ZPX(0xf6),ABS(0xeE),ABX(0xfE),-1}},
{"LSR",3,{IMP(0x4a),ZP(0x46),ZPX(0x56),ABS(0x4E),ABX(0x5E),-1}},
{"ROL",3,{IMP(0x2a),ZP(0x26),ZPX(0x36),ABS(0x2E),ABX(0x3E),-1}},
{"ROR",3,{IMP(0x6a),ZP(0x66),ZPX(0x76),ABS(0x6E),ABX(0x7E),-1}},
{"ADC",1,{IMD(0x69),ZP(0x65),ZPX(0x75),ABS(0x6D),ABX(0x7d),ABY(0x79),
INX(0x61),INY(0x71),-1}},
{"AND",1,{IMD(0x29),ZP(0x25),ZPX(0x35),ABS(0x2D),ABX(0x3d),ABY(0x39),
INX(0x21),INY(0x31),-1}},
{"BIT",1,{ZP(0x24),ABS(0x2c),-1}},
{"CMP",1,{IMD(0xc9),ZP(0xc5),ZPX(0xd5),ABS(0xcD),ABX(0xdd),ABY(0xd9),
INX(0xc1),INY(0xd1),-1}},
{"CPX",1,{IMD(0xe0),ZP(0xe4),ABS(0xec),-1}},
{"CPY",1,{IMD(0xc0),ZP(0xc4),ABS(0xcc),-1}},
{"EOR",1,{IMD(0x49),ZP(0x45),ZPX(0x55),ABS(0x4D),ABX(0x5d),ABY(0x59),
INX(0x41),INY(0x51),-1}},
{"LDA",1,{IMD(0xa9),ZP(0xa5),ZPX(0xb5),ABS(0xaD),ABX(0xbd),ABY(0xb9),
INX(0xa1),INY(0xb1),-1}},
{"LDX",1,{IMD(0xa2),ZP(0xa6),ZPY(0xB6),ABS(0xae),ABY(0xbe),-1}},
{"LDY",1,{IMD(0xa0),ZP(0xa4),ZPX(0xB4),ABS(0xac),ABX(0xbc),-1}},
{"ORA",1,{IMD(0x09),ZP(0x05),ZPX(0x15),ABS(0x0D),ABX(0x1d),ABY(0x19),
INX(0x01),INY(0x11),-1}},
{"SBC",1,{IMD(0xEB),IMD(0xe9),ZP(0xe5),ZPX(0xf5),ABS(0xeD),ABX(0xfd),ABY(0xf9),
INX(0xe1),INY(0xf1),-1}},
{"STA",2,{ZP(0x85),ZPX(0x95),ABS(0x8D),ABX(0x9d),ABY(0x99),
INX(0x81),INY(0x91),-1}},
{"STX",2,{ZP(0x86),ZPY(0x96),ABS(0x8E),-1}},
{"STY",2,{ZP(0x84),ZPX(0x94),ABS(0x8C),-1}},
{"BCC",1,{REL(0x90),-1}},
{"BCS",1,{REL(0xb0),-1}},
{"BEQ",1,{REL(0xf0),-1}},
{"BNE",1,{REL(0xd0),-1}},
{"BMI",1,{REL(0x30),-1}},
{"BPL",1,{REL(0x10),-1}},
{"BVC",1,{REL(0x50),-1}},
{"BVS",1,{REL(0x70),-1}},
};
uint16 FCEUI_Disassemble(void *XA, uint16 a, char *stringo)
{
X6502 *X=XA;
uint8 buf;
unsigned int arg;
int32 info;
int x;
int y;
info=-1;
fceuindbg=1;
buf=ARead[a](a);
a++;
for(x=0;x<NUMOPS;x++)
{
y=0;
while(optable[x].modes[y]>=0)
{
if((optable[x].modes[y]&0xFF)==buf)
{
info=optable[x].modes[y];
goto endy;
}
y++;
}
}
endy:
sprintf(stringo,"%02X ",buf);
if(info>=0)
{
int z=flengths[(info>>16)];
if(z)
{
arg=ARead[a](a);
sprintf(stringo+strlen(stringo),"%02X ",arg);
a++;
if(z==2) {arg|=ARead[a](a)<<8;sprintf(stringo+strlen(stringo),"%02X ",arg>>8);a++;}
else
strcat(stringo," ");
if((info>>16)==1) /* Relative branch */
arg=a+(char)arg;
sprintf(stringo+strlen(stringo),"%s ",optable[x].name);
sprintf(stringo+strlen(stringo),fstrings[info>>16],arg);
/*
0 "#$%02X", // immediate
1 "$%04X", // RELATIVE(jump)
2 "$%02X", // Z
3 "$%02X,X", // Z,x
4 "$%02X,Y", // Z,y
5 "$%04X", //ABS
6 "$%04X,X", // ABS,x
7 "$%04X,Y", // ABS,y
8 "($%04X)", // IND
9 "($%02X,X)", // INX
10 "($%02X),Y", // INY
11 #define IMP(x) ((11<<16)|x)
*/
{
unsigned int tmp;
switch(info>>16)
{
case 2:tmp=arg;
if(optable[x].type&1)
{
sprintf(stringo+strlen(stringo)," @ $%04X",tmp);
sprintf(stringo+strlen(stringo)," = $%02X",ARead[tmp](tmp));
}
break;
case 3:tmp=(arg+X->X)&0xff;
sprintf(stringo+strlen(stringo)," @ $%04X",tmp);
if(optable[x].type&1)
sprintf(stringo+strlen(stringo)," = $%02X",ARead[tmp](tmp));
break;
case 4:tmp=(arg+X->Y)&0xff;
sprintf(stringo+strlen(stringo)," @ $%04X",tmp);
if(optable[x].type&1)
sprintf(stringo+strlen(stringo)," = $%02X",ARead[tmp](tmp));
break;
case 5:tmp=arg;
if(optable[x].type&1)
{
sprintf(stringo+strlen(stringo)," @ $%04X",tmp);
sprintf(stringo+strlen(stringo)," = $%02X",ARead[tmp](tmp));
}
break;
case 6:tmp=(arg+X->X)&0xffff;
sprintf(stringo+strlen(stringo)," @ $%04X",tmp);
if(optable[x].type&1)
sprintf(stringo+strlen(stringo)," = $%02X",ARead[tmp](tmp));
break;
case 7:tmp=(arg+X->Y)&0xffff;
sprintf(stringo+strlen(stringo)," @ $%04X",tmp);
if(optable[x].type&1)
sprintf(stringo+strlen(stringo)," = $%02X",ARead[tmp](tmp));
break;
case 8:tmp=ARead[arg](arg)|(ARead[(arg+1)&0xffff]((arg+1)&0xffff)<<8);
sprintf(stringo+strlen(stringo)," $%04X",tmp);
break;
case 9:tmp=(arg+X->X)&0xFF;
tmp=ARead[tmp](tmp) | (ARead[(tmp+1)&0xFF]((tmp+1)&0xFF)<<8);
sprintf(stringo+strlen(stringo)," @ $%04X",tmp);
if(optable[x].type&1)
sprintf(stringo+strlen(stringo)," = $%02X",ARead[tmp](tmp));
break;
case 10:tmp=ARead[arg](arg) | (ARead[(arg+1)&0xFF]((arg+1)&0xFF)<<8);
tmp=(tmp+X->Y)&0xFFFF;
sprintf(stringo+strlen(stringo)," @ $%04X",tmp);
if(optable[x].type&1)
sprintf(stringo+strlen(stringo)," = $%02X",ARead[tmp](tmp));
break;
}
}
}
else
{
strcat(stringo," ");
strcat(stringo,optable[x].name);
}
}
else
sprintf(stringo+strlen(stringo)," .db $%02X",buf);
fceuindbg=0;
return(a);
}
void FCEUI_MemDump(uint16 a, int32 len, void (*callb)(uint16 a, uint8 v))
{
fceuindbg=1;
while(len)
{
callb(a,ARead[a](a));
a++;
len--;
}
fceuindbg=0;
}
uint8 FCEUI_MemSafePeek(uint16 A)
{
uint8 ret;
fceuindbg=1;
ret=ARead[A](A);
fceuindbg=0;
return(ret);
}
void FCEUI_MemPoke(uint16 a, uint8 v, int hl)
{
extern uint8 *Page[32];
if(hl)
{
if(Page[a/2048])
Page[a/2048][a]=v;
}
else
BWrite[a](a,v);
}
typedef struct __BPOINT {
struct __BPOINT *next;
void (*Handler)(X6502 *X, int type, unsigned int A);
unsigned int A[2];
int type;
} BPOINT;
static BPOINT *BreakPoints=NULL;
static BPOINT *LastBP=NULL;
static void (*CPUHook)(X6502 *)=NULL;
static int FindBPoint(X6502 *X, int who, unsigned int A)
{
BPOINT *tmp;
tmp=BreakPoints;
while(tmp)
{
if(tmp->type&who)
{
if(tmp->type&BPOINT_PC)
if(X->PC!=A) goto don; /* Doesn't match, so go on. */
if((A>=tmp->A[0]) && (A<=tmp->A[1])) /* Whee, match. */
{
tmp->Handler(X,tmp->type,A);
return(1);
}
}
don:
tmp=tmp->next;
}
return(0);
}
static uint8 ReadHandler(X6502 *X, unsigned int A)
{
extern X6502 XSave;
if(X->preexec)
FindBPoint(&XSave,BPOINT_READ,A);
return(ARead[A](A));
}
static void WriteHandler(X6502 *X, unsigned int A, uint8 V)
{
extern X6502 XSave;
if(X->preexec)
FindBPoint(&XSave,BPOINT_WRITE,A);
else
BWrite[A](A,V);
}
int FCEUI_AddBreakPoint(int type, unsigned int A1, unsigned int A2,
void (*Handler)(X6502 *, int type, unsigned int A))
{
BPOINT *tmp;
tmp=(BPOINT *)malloc(sizeof(BPOINT));
tmp->A[0]=A1;
tmp->A[1]=A2;
tmp->Handler=Handler;
tmp->type=type;
tmp->next=0;
if(BreakPoints==NULL)
BreakPoints=tmp;
else
LastBP->next=tmp;
LastBP=tmp;
X6502_Debug(CPUHook,ReadHandler,WriteHandler);
return(1);
}
int FCEUI_SetBreakPoint(uint32 w, int type, unsigned int A1, unsigned int A2,
void (*Handler)(X6502 *, int type, unsigned int A))
{
uint32 x=0;
BPOINT *tmp;
tmp=BreakPoints;
while(tmp)
{
if(w==x)
{
tmp->type=type;
tmp->A[0]=A1;
tmp->A[1]=A2;
tmp->Handler=Handler;
return(1);
}
x++;
tmp=tmp->next;
}
return(0);
}
int FCEUI_GetBreakPoint(uint32 w, int *type, unsigned int *A1, unsigned int *A2,
void (**Handler)(X6502 *, int type, unsigned int A))
{
uint32 x=0;
BPOINT *tmp;
tmp=BreakPoints;
while(tmp)
{
if(w==x)
{
*type=tmp->type;
*A1=tmp->A[0];
*A2=tmp->A[1];
*Handler=tmp->Handler;
return(1);
}
x++;
tmp=tmp->next;
}
return(0);
}
int FCEUI_ListBreakPoints(int (*callb)(int type, unsigned int A1, unsigned int A2,
void (*Handler)(X6502 *, int type, unsigned int A) ))
{
BPOINT *tmp;
tmp=BreakPoints;
while(tmp)
{
callb(tmp->type,tmp->A[0],tmp->A[1],tmp->Handler);
tmp=tmp->next;
}
return(1);
}
int FCEUI_DeleteBreakPoint(uint32 w)
{
BPOINT *tmp,*prev=NULL;
uint32 x=0;
tmp=BreakPoints;
while(tmp)
{
if(w==x)
{
if(prev) /* Not the first breakpoint. */
{
if(tmp->next) /* More breakpoints. */
prev->next=tmp->next;
else /* This is the last breakpoint. */
{
prev->next=0;
LastBP=prev;
}
}
else /* The first breakpoint. */
{
if(tmp->next) /* More breakpoints. */
BreakPoints=tmp->next;
else
{
BreakPoints=LastBP=0; /* No more breakpoints. */
/* Update the CPU hooks. */
X6502_Debug(CPUHook,BreakPoints?ReadHandler:0,BreakPoints?WriteHandler:0);
}
}
free(tmp);
return(1);
}
prev=tmp;
tmp=tmp->next;
x++;
}
return(0);
}
void FCEUI_SetCPUCallback(void (*callb)(X6502 *X))
{
CPUHook=callb;
X6502_Debug(CPUHook,BreakPoints?ReadHandler:0,BreakPoints?WriteHandler:0);
}
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