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asm68k.c
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// V4.0 8.17.03 Added address to DS directive and open labels in list file.
// Added ASM68K version line to list file.
// Then took it out.
// V3.5 9.15.99 Ignore lines after END bug fixed.
// V3.4 1.11.99 Forced 32-bit address generation on mode-7
// addresses. Increased symbol table size to 1024.
// V3.3 11.2.98 Fixed forward reference problem with LEA
// Added EQU value display to .LST file
// V3.2 4.10.98 Added data/address registers to symbol table
// Chnaged symbol table display (two sorted columns)
// Changed warning/fatal output (first error only)
// Took SP stuff back out
// V3.1 3.12.98 Fixed skipped blanks in DC
// Fixed EQU evaluation
// V3.0 2.14.98 Added date to signon message
// Took line numbers out of list file
// Added RTD instruction
// Added SP recognition (in place of A7)
// V2.2 11.4.96 Changed tabs to blanks in list file
// V2.1 9.11.96 Fixed Srecord problem with DS directive
// Version 2.0a, 3.8.96
// Fixed BGT/BLT opcodes, MOVEM's comma problem
/* 68000 Assembler, Version 2.0 */
/* C1995 James L. Antonakos */
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "asm.h"
void writequlist(unsigned long equval);
int rsym;
int ENDOPfound,linesignored;
int elabel;
main(int argc, char *argv[])
{
printf("ASM68K Version 4.0, 8/17/03\n");
srcfile[0] = '\0';
lstfile[0] = '\0';
objfile[0] = '\0';
hexfile[0] = '\0';
if (argc > 1)
{
strcat(srcfile,argv[1]);
strcat(srcfile,".asm");
strcat(lstfile,argv[1]);
strcat(lstfile,".lst");
strcat(objfile,argv[1]);
strcat(objfile,".obj");
strcat(hexfile,argv[1]);
strcat(hexfile,".hex");
srcptr = fopen(srcfile,"r");
if (srcptr == NULL)
{
printf("Cannot open %s.\n",srcfile);
exit(1);
}
lstptr = fopen(lstfile,"w");
if (lstptr == NULL)
{
printf("Cannot open %s.\n",lstfile);
exit(1);
}
objptr = fopen(objfile,"wb");
if (objptr == NULL)
{
printf("Cannot open %s.\n",objfile);
exit(1);
}
hexptr = fopen(hexfile,"w");
if (hexptr == NULL)
{
printf("Cannot open %s.\n",hexfile);
exit(1);
}
}
else
{
printf("No source file specified.\n");
printf("Usage: asm68k <filename>\n");
printf("Example: asm68k hello\n");
printf("where hello is an .asm file\n");
exit(2);
}
initsymtab();
initpass(1);
makeapass();
srcptr = fopen(srcfile,"r");
initpass(2);
// tolst(lstptr,";%s created by ASM68K Version 4.0\n\n",lstfile);
s0rec();
makeapass();
s9rec();
setsymbol("PC",pc,'R');
showsymbol();
printf("\n%d lines processed.\n",line);
if(linesignored) //9.15.99
printf("%d lines after END ignored.\n",linesignored);
printf("%d warnings.\n",warnings);
printf("%d fatals.\n",fatals);
tolst(lstptr,"%d lines processed.\n",line);
if(linesignored) //9.15.99
tolst(lstptr,"%d lines after END ignored.\n",linesignored);
tolst(lstptr,"%d warnings.\n",warnings);
tolst(lstptr,"%d fatals.\n",fatals);
fclose(lstptr);
fclose(objptr);
fclose(hexptr);
}
void s0rec()
{
unsigned char len,k,odat;
fprintf(hexptr,"S0");
odat = 0;
fprintf(objptr,"%c",odat);
len = strlen(hexfile) - 4;
fprintf(hexptr,"%02X0000",len + 3);
fprintf(objptr,"%c%c%c",len+3,odat,odat);
srecsum = len + 3;
for (k = 0; k < len; k++)
{
fprintf(hexptr,"%02X",hexfile[k]);
srecsum += hexfile[k];
odat = hexfile[k];
fprintf(objptr,"%c",odat);
}
srecsum = 0xff - srecsum;
fprintf(hexptr,"%02X\n",srecsum);
odat = srecsum;
fprintf(objptr,"%c",odat);
}
void writes1rec()
{
int k;
unsigned char odat;
fprintf(hexptr,"S1%02X%04X",sreclen,srecpc);
odat = 1;
fprintf(objptr,"%c",odat);
odat = sreclen;
fprintf(objptr,"%c",odat);
odat = (srecpc >> 8) & 0xff;
fprintf(objptr,"%c",odat);
odat = srecpc & 0xff;
fprintf(objptr,"%c",odat);
for (k = 0; k < sreclen-3; k++)
{
fprintf(hexptr,"%02X",srecbuff[k]);
odat = srecbuff[k];
fprintf(objptr,"%c",odat);
}
srecsum += sreclen;
srecsum = 0xff - srecsum;
fprintf(hexptr,"%02X\n",srecsum);
odat = srecsum;
fprintf(objptr,"%c",odat);
s1pending = FALSE;
}
void s1rec(int oper, unsigned char data)
{
int k;
if (oper == SORG)
{
if (s1pending) writes1rec();
sreclen = 3;
srecsum = ((pc >> 8) & 0xff) + (pc & 0xff);
srecpc = pc & 0xffff;
srecptr = 0;
s1pending = TRUE;
}
if ((oper == SCLOSE) && s1pending) writes1rec();
if (oper == SWRITE)
{
if (!s1pending)
{
sreclen = 3;
srecsum = ((pc >> 8) & 0xff) + (pc & 0xff);
srecpc = pc & 0xffff;
srecptr = 0;
s1pending = TRUE;
}
srecbuff[srecptr] = data;
srecptr++;
sreclen++;
srecsum += data;
if (srecptr == 0x22) writes1rec();
}
}
void s9rec()
{
unsigned char odat;
if (s1pending) s1rec(SCLOSE,0);
fprintf(hexptr,"S903%04X",startaddress);
odat = 9;
fprintf(objptr,"%c",odat);
odat = 3;
fprintf(objptr,"%c",odat);
odat = (startaddress >> 8) & 0xff;
fprintf(objptr,"%c",odat);
odat = startaddress & 0xff;
fprintf(objptr,"%c",odat);
srecsum = 3;
srecsum += (startaddress >> 8) & 0xff;
srecsum += startaddress & 0xff;
srecsum = 0xff - srecsum;
fprintf(hexptr,"%02X\n",srecsum);
odat = srecsum;
fprintf(objptr,"%c",odat);
}
void initpass(int passval)
{
line = 0;
lineptr = 0;
pass = passval;
fatals = 0;
warnings = 0;
pc = 0;
oldpc = 0;
startaddress = 0;
stopped = FALSE;
gotlabel = FALSE;
s1pending = FALSE;
srecptr = 0;
ENDOPfound = FALSE;
linesignored = 0;
}
void makeapass()
{
char fchar;
fchar = getc(srcptr);
while (fchar != EOF)
{
linetxt[lineptr] = fchar;
lineptr++;
if (fchar == '\n')
{
line++;
linetxt[lineptr] = '\0';
lineptr = 0;
if (!ENDOPfound) //9.15.99
parse();
else
{
skipblank(); // 8.17.03
if((linetxt[lineptr] != '\0') // 8.17.03
&& (linetxt[lineptr] != 0x0a)
&& (linetxt[lineptr] != 0x0d))
linesignored++;
}
lineptr = 0;
}
fchar = getc(srcptr);
}
fclose(srcptr);
}
void parse()
{
lbuffptr = -1;
writeflag = FALSE;
comment = FALSE;
warnptr = -1;
fatalptr = -1;
elabel = FALSE;
process_symbol();
skipblank();
process_op();
skipblank();
if (openlabel) setsymbol(label,pc,'L');
if ((!comment) && ('\n' != linetxt[lineptr]))
fatalerror(24);
lineptr = 0;
showwarnings();
showfatals();
}
void process_op()
{
if (!comment)
{
getopcode();
if (whichop != 254)
{
elabel = FALSE; // 8.17.03
getsize();
switch(opiden)
{
case PSEUDO : do_pseudo(); break;
case CPUOP : do_68kop(); break;
}
}
else
{
writelist();
}
}
else
writelist();
}
void getopcode()
{
getop(opcode);
if (0 == strlen(opcode))
whichop = 254;
else
whichop = findop(opcode);
if ((whichop != -1) && (whichop != 254))
{
optype = optab[whichop].type;
opiden = optab[whichop].iden;
oppatt = optab[whichop].pattern;
}
else
opiden = -1;
}
void getop(char opcode[])
/* Called during both passes */
{
int opptr = 0;
while (isalpha(linetxt[lineptr]) && (opptr < SYMSIZE))
{
opcode[opptr] = toupper(linetxt[lineptr]);
opptr++;
lineptr++;
}
opcode[opptr] = '\0';
if ((opptr == SYMSIZE) && (0 != isalpha(linetxt[lineptr])) && (pass == 1))
fatalerror(25);
}
int findop(char opcode[])
/* Called during both passes */
{
int k = 0, found = 0, numops;
numops = sizeof(optab)/sizeof(inst);
while((k < numops) && !found)
{
if (0 == strcmp(optab[k].opcode,opcode))
found++;
else
k++;
}
if (!found)
fatalerror(26);
if (found)
return k;
else
return -1;
}
void getsize()
{
char sizext;
if ('.' == linetxt[lineptr])
{
lineptr++;
sizext = toupper(linetxt[lineptr]);
lineptr++;
if (0 != isalpha(sizext))
{
opsize = -1;
switch(sizext)
{
case 'B' : opsize = BYTE; break;
case 'W' : opsize = WORD; break;
case 'L' : opsize = LONG; break;
case 'S' : opsize = SHORT; break;
}
if (opsize == -1)
fatalerror(27);
}
else
{
opsize = -1;
fatalerror(27);
}
}
else
opsize = UNSIZED;
}
void do_pseudo()
{
unsigned long int data;
char moreflag;
char savelabel[33];
switch(optype)
{
case ORGOP: valundef = FALSE;
result = eval();
pc = result & 0xffffff;
oldpc = pc;
if (openlabel) setsymbol(label,pc,'L');
if (pass == 2) s1rec(SORG,0);
writelist();
break;
case DCOP: if (openlabel) {
setsymbol(label,pc,'L');
// if (0 == strcmpi(label,"CMD_ADR"))
// printf("%s = %08lX\n",label,pc);
}
if (opsize == UNSIZED) opsize = LONG;
moreflag = TRUE;
do
{
skipblank();
if (lchar == '\'')
{
// eat('\'');
lineptr++;
lchar = linetxt[lineptr]; //3.12.98
do
{
if ((lchar != '\'') && (lchar != '\n'))
{
putter(opsize,lchar);
lineptr++;
lchar = linetxt[lineptr];
}
} while ((lchar != '\'') && (lchar != '\n'));
eat('\'');
}
else
{
valundef = FALSE;
data = eval();
if ((opsize == BYTE) && (BYTE != typer(data)))
{
fatalerror(29);
data = 0;
}
if ((opsize == WORD) && (LONG == typer(data)))
{
fatalerror(30);
data = 0;
}
putter(opsize,data);
}
skipblank();
if (ischar(','))
eat(',');
else
moreflag = FALSE;
} while (moreflag);
writelist();
break;
case DSOP: if (openlabel) setsymbol(label,pc,'L');
valundef = FALSE;
result = eval();
switch(opsize)
{
case WORD: result <<= 1; break;
case LONG: result <<= 2; break;
case UNSIZED: result <<= 2; break;
}
pc += result;
s1rec(SCLOSE,0); //9.11.96 S-record fix
writelist();
break;
case EQUOP: valundef = TRUE; // 3.12.98
savelabel[0] = '\0';
strcat(savelabel,label);
result = eval();
// printf("line %d, label %s, EQU result = %08lX, valundef = %d\n",
// line,savelabel,result,valundef);
if ((pass == 1) && !openlabel)
fatalerror(10);
//else // 3.12.98
if (!valundef)
setsymbol(savelabel,result,'E');
writequlist(result);
break;
case ENDOP: if (openlabel) setsymbol(label,pc,'L');
skipblank();
if (isalpha(lchar) || isdigit(lchar) || (lchar == '$'))
{
valundef = FALSE;
startaddress = eval() & 0xffff;
}
writelist();
ENDOPfound = TRUE; //9.15.99
break;
}
}
void do_68kop()
{
if (openlabel) setsymbol(label,pc,'L');
switch(optype)
{
case 1: ___abcdSbcd(); break;
case 201: ___addAndOrSub(); break;
case 22: ___addaCmpaSuba(); break;
case 600: ___addiCmpiSubi(); break;
case 601: ___addiCmpiSubi(); break;
case 602: ___addiCmpiSubi(); break;
case 11: ___addqSubq(); break;
case 19: ___addxSubx(); break;
case 230: ___andiEoriOri(); break;
case 231: ___andiEoriOri(); break;
case 232: ___andiEoriOri(); break;
case 17: ___asdLsdRodRoxd(); break;
case 181: ___bitops(); break;
case 182: ___bitops(); break;
case 183: ___bitops(); break;
case 184: ___bitops(); break;
case 12: ___branches(); break;
case 0: ___NopResetRteRtrRtsTrapv(); break;
case 99: ___Rtd(); break;
case 21: ___clrNegNegxNotTst(); break;
case 202: ___cmp(); break;
case 26: ___cmpm(); break;
case 5: ___dbcc(); break;
case 203: ___eor(); break;
case 27: ___exg(); break;
case 28: ___ext(); break;
case 15: ___jumps(); break;
case 29: ___lea(); break;
case 16: ___link(); break;
case 31: ___move(); break;
case 3: ___movea(); break;
case 35: ___movem(); break;
case 25: ___movep(); break;
case 30: ___moveq(); break;
case 10: ___muluMulsDivuDivsChk(); break;
case 14: ___pea(); break;
case 34: ___scc(); break;
case 9: ___stop(); break;
case 4: ___swap(); break;
case 13: ___tasNbcd(); break;
case 8: ___trap(); break;
case 7: ___unlk(); break;
}
writelist();
}
void process_symbol()
{
lchar = linetxt[lineptr];
if (isalpha(lchar))
{
getsymbol(label);
if (pass == 1)
newsymptr = addsymbol(label);
if (pass == 2)
newsymptr = findsymbol(label);
}
else
if ((' ' != lchar) && ('\t' != lchar) &&
('\n' != lchar) && (';' != lchar))
fatalerror(28);
}
void getsymbol(char sname[])
/* Called during both passes */
{
int sptr = 0;
do
{
sname[sptr] = toupper(linetxt[lineptr]);
sptr++;
lineptr++;
} while ((isalnum(linetxt[lineptr]) || (linetxt[lineptr] == '_'))
&& (sptr < SYMSIZE));
sname[sptr] = '\0';
gotlabel = TRUE;
elabel = TRUE; // 8.17.03
if ((sptr == SYMSIZE) && (0 != isalnum(linetxt[lineptr]))
&& (linetxt[lineptr] != '_'))
{
fatalerror(31);
while (isalnum(linetxt[lineptr]) || (linetxt[lineptr] == '_'))
lineptr++;
}
}
void initsymtab()
{
symptr = 0;
addsymbol("CCR");
setsymbol("CCR",xCCR,'R');
addsymbol("SR");
setsymbol("SR",xSR,'R');
addsymbol("USP");
setsymbol("USP",xUSP,'R');
addsymbol("SSP");
setsymbol("SSP",xSSP,'R');
addsymbol("SP");
setsymbol("SP",xSP,'R');
addsymbol("PC");
setsymbol("PC",0,'R');
addsymbol("D0");
setsymbol("D0",0,'D');
addsymbol("D1");
setsymbol("D1",1,'D');
addsymbol("D2");
setsymbol("D2",2,'D');
addsymbol("D3");
setsymbol("D3",3,'D');
addsymbol("D4");
setsymbol("D4",4,'D');
addsymbol("D5");
setsymbol("D5",5,'D');
addsymbol("D6");
setsymbol("D6",6,'D');
addsymbol("D7");
setsymbol("D7",7,'D');
addsymbol("A0");
setsymbol("A0",0,'A');
addsymbol("A1");
setsymbol("A1",1,'A');
addsymbol("A2");
setsymbol("A2",2,'A');
addsymbol("A3");
setsymbol("A3",3,'A');
addsymbol("A4");
setsymbol("A4",4,'A');
addsymbol("A5");
setsymbol("A5",5,'A');
addsymbol("A6");
setsymbol("A6",6,'A');
addsymbol("A7");
setsymbol("A7",7,'A');
rsym = symptr;
openlabel = FALSE;
}
int addsymbol(char sname[])
/* Called during pass 1 */
{
int sympos;
sympos = findsymbol(sname);
if (sympos == -1)
{
if (symptr < MAXSYM)
{
symbols[symptr].name[0] = '\0';
strcat(symbols[symptr].name,sname);
symbols[symptr].type = 'U';
symbols[symptr].value = 0;
symptr++;
openlabel = TRUE;
// if (0 == strcmpi(sname,"CMD_ADR"))
// printf("%s ... %08lX\n",sname,pc);
}
else
{
fatalerror(32);
sympos = -1;
openlabel = FALSE;
}
}
else
{
fatalerror(33);
sympos = -1;
openlabel = FALSE;
}
}
void showsymbol()
{
int k,n,i,j;
char ost[128], cst[64],sc;
unsigned long int ad;
if (0 == symptr)
{
tolst(lstptr,"No symbols defined.\n");
}
else
{
tolst(lstptr,"\nSymbol Table, %d reserved symbols, "
"%d user symbols\n\n",rsym,symptr-rsym);
for(i = rsym; i < symptr; i++)
for(j = rsym; j < symptr-1; j++)
if(strcmp(symbols[j].name,
symbols[j+1].name) > 0)
{
strcpy(cst,symbols[j].name);
sc = symbols[j].type;
ad = symbols[j].value;
strcpy(symbols[j].name,
symbols[j+1].name);
symbols[j].type = symbols[j+1].type;
symbols[j].value = symbols[j+1].value;
strcpy(symbols[j+1].name,cst);
symbols[j+1].type = sc;
symbols[j+1].value = ad;
}
ost[0] = '\0';
n = 0;
tolst(lstptr," ----- Reserved Symbols -----\n");
for (k = 0; k < symptr; k++)
{
if (k == rsym)
tolst(lstptr," ----- User Symbols -----\n");
sprintf(cst,"%16s %c %06lX ",symbols[k].name,
symbols[k].type,symbols[k].value);
strcat(ost,cst);
n++;
if (n == 2)
{
tolst(lstptr,"%s\n",ost);
ost[0] = '\0';
n = 0;
}
}
if (n != 0)
{
tolst(lstptr,"%s\n",ost);
}
}
tolst(lstptr,"\n");
}
int findsymbol(char sname[])
/* Called during both passes */
{
int k = 0, found = 0;
while((k < symptr) && !found)
{
if (0 == strcmp(symbols[k].name,sname))
found++;
else
k++;
}
if (!found)
fatalerror(34);
if (found)
return k;
else
return -1;
}
void setsymbol(char sname[], unsigned long int value, char def)
{
newsymptr = findsymbol(sname);
symbols[newsymptr].type = def;
symbols[newsymptr].value = value;
openlabel = FALSE;
}
void skipblank()
{
while ((' ' == linetxt[lineptr]) || ('\t' == linetxt[lineptr]))
lineptr++;
if (';' == linetxt[lineptr])
comment = TRUE;
lchar = linetxt[lineptr];
}
int typer(unsigned long int number)
{
if (0 == (number & 0xffffff00))
return BYTE;
if ((0xffffff00 == (number & 0xffffff00)) && negflag)
return BYTE;
if (0 == (number & 0xffff0000))
return WORD;
if ((0xffff0000 == (number & 0xffff0000)) && negflag)
return WORD;
else
return LONG;
}
void gethex()
{
number = 0;
digit = linetxt[lineptr];
while (isxdigit(digit))
{
number <<= 4;
digit = toupper(digit) - 0x30;
if (digit > 9)
digit -= 7;
number += digit;
lineptr++;
digit = linetxt[lineptr];
}
valundef = FALSE; //4.10.98
}
void getdeci()
{
number = 0;
digit = linetxt[lineptr];
while (isdigit(digit))
{
number *= 10;
digit -= 0x30;
number += digit;
lineptr++;
digit = linetxt[lineptr];
}
valundef = FALSE; // 4.10.98
}
int isreg()
{
if ((digit >= '0' ) && (digit <= '7'))
return TRUE;
else
return FALSE;
}
int mathop(char msym)
{
int mflag;
mflag = FALSE;
switch(msym)
{
case '+': mflag = TRUE; break;
case '-': mflag = TRUE; break;
case '*': mflag = TRUE; break;
case '/': mflag = TRUE; break;
}
return mflag;
}
long int eval()
{
long int expval,temp;
char mathbak;
skipblank();
lchar = linetxt[lineptr];
if ('(' == lchar)
{
eat('(');
expval = eval();
eat(')');
skipblank();
lchar = linetxt[lineptr];
}
else
{
getvalue();
expval = number;
// printf("line %d, number = %X\n",line,number);
skipblank();
lchar = linetxt[lineptr];
}
if (mathop(lchar))
{
do
{
mathbak = lchar;
eat(lchar);
skipblank();
lchar = linetxt[lineptr];
if ('(' == lchar)
{
eat('(');
temp = eval();
eat(')');
skipblank();
lchar = linetxt[lineptr];
}
else
{
getvalue();
temp = number;
skipblank();
lchar = linetxt[lineptr];
}
switch(mathbak)
{
case '+': expval += temp; break;
case '-': expval -= temp; break;
case '*': expval *= temp; break;
case '/': expval /= temp; break;
}
} while (mathop(lchar));
}
if (!valundef) return expval;
else return 0;
}
void getvalue()
{
int gotit;
if ('-' == lchar)
{
negflag = TRUE;
eat('-');
skipblank();
lchar = linetxt[lineptr];
}
else
negflag = FALSE;
if (isdigit(lchar))
getdeci();
else
if (ischar('$'))
{
eat('$');
skipblank();
lchar = linetxt[lineptr];
gethex();
}
else
if (isalpha(lchar))
{
getsymbol(label);
gotit = findsymbol(label);
if (-1 != gotit)
{
number = symbols[gotit].value;
if ('U' == symbols[gotit].type) valundef = TRUE;
else valundef = FALSE;
if ('R' == symbols[gotit].type) foundR = TRUE;
}
//else
// valundef = TRUE;
}
else
if ('\'' == lchar)
{
number = 0;
// eat('\'');
lineptr++; // 3.12.98
lchar = linetxt[lineptr];
while ('\'' != lchar)
{
number <<= 8;
number |= lchar;
lineptr++; // 3.12.98
lchar = linetxt[lineptr];
}
eat('\''); // 3.12.98
valundef = FALSE;
}
if (negflag)
number = 0 - number;
}
void eat(char symbol)
{
skipblank();
if (toupper(symbol) == toupper(lchar))
{
lineptr++;
lchar = linetxt[lineptr];
skipblank(); //MOVEM fix 3.8.96
}
else
{
eatsymbol = symbol;
fatalerror(7);
}
}
int ischar(char lchr)
{
if (lchr == linetxt[lineptr])
return TRUE;
else
return FALSE;
}
// int pphase[2048];
void putter(int size, unsigned long int value)