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compiler.c
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#include <stdio.h>
#include <stdlib.h>
#include "defineList.h"
#define lower(x) (((x)>0x40 && (x)<0x5b)?(x)|0x20:(x))
#define READBUFFERSIZE 512
#define WRITEBUFFERSIZE 512
#ifdef DEBUG
char readbuffer[READBUFFERSIZE];
#endif
int buffpos = 0; // position in write buffer
char wbuffer[WRITEBUFFERSIZE]; // used to buffer the output
unsigned long org = 0x100; // com file start offset
unsigned long offset; // keep tabs of the offset
unsigned long filesize; // keep tabs of the output file size
char errorflag = 0; // check for errors
unsigned char memreg2val; // second register in a memory ref
unsigned long memimmediate; // immediate in a mem ref
unsigned char PointerRef; // assemble in 32 bit pointer?
char dirtylabels=0; // see if labels need fixing
// table to store labels, names and values
typedef struct sltable
{
struct sltable *next;
char *name;
unsigned long value;
} tltable;
// table to store equate names and values
typedef struct setable
{
struct setable *next;
char *name;
char *value;
char flag;
} tetable;
tltable *ltable = NULL;
tetable *etable = NULL;
typedef struct
{
char name[4];
unsigned char value;
unsigned long flag;
} tregisters;
#define NUMREGS 20
tregisters registers[] =
{
"al",0x00,regal|reg8 ,"ah",0x04,regah|reg8 ,"ax",0x00,regax|reg16,
"cl",0x01,regcl|reg8 ,"ch",0x05,regch|reg8 ,"cx",0x01,regcx|reg16,
"dl",0x02,regdl|reg8 ,"dh",0x06,regdh|reg8 ,"dx",0x02,regdx|reg16,
"bl",0x03,regbl|reg8 ,"bh",0x07,regbh|reg8 ,"bx",0x03,regbx|reg16,
"sp",0x04,regsp|reg8 ,"bp",0x05,reg16|regbp ,"si",0x06,reg16|regsi,
"di",0x07,reg16|regdi ,"es",0x00,reges|seg16 ,"ds",0x03,regds|seg16,
"ss",0x02,regss|seg16 ,"cs",0x01,regcs|seg16
#ifdef CODE32BIT
,"eax",0x00,regeax|reg32 ,"ecx",0x01,regecx|reg32 ,"edx",0x02,regedx|reg32
,"ebx",0x03,regebx|reg32 ,"esp",0x04,regesp|reg32 ,"ebp",0x05,regebp|reg32
,"esi",0x06,regesi|reg32 ,"edi",0x07,regedi|reg32
#endif
};
typedef struct
{
char name[6];
int value;
} tstr_opcodes;
typedef struct
{
int ocode;
int length;
unsigned char code[3];
unsigned short val1,val2,val3;
unsigned short instruct; // instructions for assembling code
} topcodes;
enum eopcodes {
opnone ,opaaa ,opaad ,opaam,
opaas ,opadc ,opadd ,opand,
opclc ,opcld ,opcli ,opcall,
opcbw ,opcmc ,opcmp ,opcmpsb,
opcmpsw ,opcwd ,opdaa ,opdas,
opdec ,opdiv ,ophlt ,opidiv,
opimul ,opin ,opinc ,opint,
opiret ,opja ,opjae ,opjb,
opjbe ,opjc ,opjcxz ,opje,
opjg ,opjge ,opjl ,opjle,
opjmp ,opjmpf ,opjna ,opjnae,
opjnb ,opjnbe ,opjnc ,opjne,
opjng ,opjnge ,opjnl ,opjnle,
opjno ,opjnp ,opjns ,opjnz,
opjo ,opjp ,opjpe ,opjpo,
opjs ,opjz ,oplahf ,oplds,
oplea ,oples ,oplodsb ,oplodsw,
oploop ,oploope ,oploopne ,oploopnz,
oploopz ,opmov ,opmovsb ,opmovsw,
opmul ,opneg ,opnop ,opnot,
opor ,opout ,oppopf ,oppushf,
oprcl ,oprcr ,oppop ,oppush,
oprep ,oprepe ,oprepne ,oprepnz,
oprepz ,opret ,opretf ,oprol,
opror ,opsahf ,opsal ,opsar,
opsbb ,opsub ,opscasb ,opscasw,
opshl ,opshr ,opstc ,opstd,
opsti ,opstosb ,opstosw ,optest,
opwait ,opxchg ,opxlat ,opxor,
op32bit
};
#define NUMOPCODES 116
tstr_opcodes str_opcodes[NUMOPCODES] =
{
"aaa",opaaa,"aad",opaad,"aam",opaam,"aas",opaas,
"adc",opadc,"add",opadd,"and",opand,"call",opcall,
"cbw",opcbw,"clc",opclc,"cld",opcld,"cli",opcli,"cmc",opcmc,
"cmp",opcmp,"cmpsb",opcmpsb,"cmpsw",opcmpsw,"cwd",opcwd,
"daa",opdaa,"das",opdas,"dec",opdec,"div",opdiv,"hlt",ophlt,
"idiv",opidiv,"imul",opimul,"in",opin,"inc",opinc,"int",opint,
"iret",opiret,"ja",opja,"jae",opjae,"jb",opjb,"jbe",opjbe,
"jc",opjc,"jcxz",opjcxz,"je",opje,"jg",opjg,"jge",opjge,
"jl",opjl,"jle",opjle,"jna",opjna,"jnae",opjnae,"jnb",opjnb,
"jnbe",opjnbe,"jnc",opjnc,"jne",opjne,"jng",opjng,"jnge",opjnge,
"jnl",opjnl,"jnle",opjnle,"jno",opjno,"jnp",opjnp,"jns",opjns,
"jnz",opjnz,"jo",opjo,"jp",opjp,"jpe",opjpe,"jpo",opjpo,
"js",opjs,"jz",opjz,"jmp",opjmp,"jmpf",opjmpf,"lahf",oplahf,"lds",oplds,
"lea",oplea,"les",oples,"lodsb",oplodsb,"lodsw",oplodsw,
"loop",oploop,"loope",oploope,"loopne",oploopne,"loopnz",oploopnz,
"loopz",oploopz,"mov",opmov,"movsb",opmovsb,"movsw",opmovsw,
"mul",opmul,"neg",opneg,"nop",opnop,"not",opnot,"or",opor,
"out",opout,"pop",oppop,"push",oppush,"popf",oppopf,
"pushf",oppushf,"rcl",oprcl,"rcr",oprcr,"rep",oprep,
"repe",oprepe,"repne",oprepne,"repnz",oprepnz,"repz",oprepz,
"ret",opret,"retf",opretf,"rol",oprol,"ror",opror,"sahf",opsahf,
"sal",opsal,"sar",opsar,"sbb",opsbb,"scasb",opscasb,
"scasw",opscasw,"shl",opshl,"shr",opshr,"stc",opstc,"std",opstd,
"sti",opsti,"stosb",opstosb,"stosw",opstosw,"sub",opsub,
"test",optest,"wait",opwait,"xchg",opxchg,"xlat",opxlat,
"xor",opxor,
"32bit",op32bit
};
#define NUMINSTRUCTIONS (262+17)
/* machine language values */
topcodes opcodes[NUMINSTRUCTIONS] =
{
/* opcode operand1,operand2,operand3 */
/* ascii adjusts */
opaaa,1,0x37,0x00,0x00,none,none,none,Inothing,
opaad,2,0xd5,0x0a,0x00,none,none,none,Inothing,
opaam,2,0xd4,0x0a,0x00,none,none,none,Inothing,
opaas,1,0x3f,0x00,0x00,none,none,none,Inothing,
/* add with carry */
opadc,1,0x14,0x00,0x00,regal,immed8,none,Iimmedsecond,
opadc,1,0x15,0x00,0x00,regax,immed16,none,Iimmedsecond,
opadc,1,0x80,0xd0,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opadc,1,0x10,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
opadc,1,0x81,0x06,0x00,reg16,immed16,none,Ifirstval|Ical2|Icalreg|Iimmedsecond,
opadc,1,0x11,0x40,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg,
opadc,1,0x12,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
opadc,1,0x12,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opadc,1,0x13,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opadc,1,0x13,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opadc,1,0x81,0x10,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
opadc,1,0x83,0x10,0x00,reg16|memref,immed8,none,Ifirstval|Icalreg|Iimmedsecond,
/* add */
opadd,1,0x04,0x00,0x00,regal,immed8,none,Iimmedsecond,
opadd,1,0x05,0x00,0x00,regax,immed16,none,Iimmedsecond,
opadd,1,0x80,0xc0,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opadd,1,0x00,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
opadd,1,0x81,0xc0,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opadd,1,0x01,0x00,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg,
opadd,1,0x02,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
opadd,1,0x02,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opadd,1,0x03,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opadd,1,0x03,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opadd,1,0x81,0x00,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
opadd,1,0x83,0x00,0x00,reg16|memref,immed8,none,Ifirstval|Icalreg|Iimmedsecond,
/* and */
opand,1,0x24,0x00,0x00,regal,immed8,none,Iimmedsecond,
opand,1,0x25,0x00,0x00,regax,immed16,none,Iimmedsecond,
opand,1,0x80,0xe0,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opand,1,0x20,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
opand,1,0x81,0xe0,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opand,1,0x21,0x00,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg,
opand,1,0x22,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
opand,1,0x22,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opand,1,0x23,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opand,1,0x23,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opand,1,0x81,0x20,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
opand,1,0x83,0x20,0x00,reg16|memref,immed8,none,Ifirstval|Icalreg|Iimmedsecond,
/* call */
opcall,1,0xe8,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump,
opcall,1,0xff,0x10,0x00,reg16|memref,none,none,Ifirstval|Icalreg,
opcall,1,0x9a,0x00,0x00,pointer,none,none,Iimmedfirst,
/* clear flag bits */
opcbw,1,0x98,0x00,0x00,none,none,none,Inothing,
opclc,1,0xf8,0x00,0x00,none,none,none,Inothing,
opcld,1,0xfc,0x00,0x00,none,none,none,Inothing,
opcli,1,0xfa,0x00,0x00,none,none,none,Inothing,
opcmc,1,0xf5,0x00,0x00,none,none,none,Inothing,
/* compare */
opcmp,1,0x3c,0x00,0x00,regal,immed8,none,Iimmedsecond,
opcmp,1,0x3d,0x00,0x00,regax,immed16,none,Iimmedsecond,
opcmp,1,0x3a,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
opcmp,1,0x3b,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opcmp,1,0x3a,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opcmp,1,0x38,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
opcmp,1,0x3b,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opcmp,1,0x39,0x00,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg,
opcmp,1,0x80,0xf8,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opcmp,1,0x81,0xf8,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opcmp,1,0x81,0x38,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
opcmp,1,0x80,0x38,0x00,reg16|memref,immed8,none,Ifirstval|Icalreg|Iimmedsecond,
opcmpsb,1,0xa6,0x00,0x00,none,none,none,Inothing,
opcmpsw,1,0xa7,0x00,0x00,none,none,none,Inothing,
opcwd,1,0x99,0x00,0x00,none,none,none,Inothing,
opdaa,1,0x27,0x00,0x00,none,none,none,Inothing,
opdas,1,0x2f,0x00,0x00,none,none,none,Inothing,
/* decrease */
opdec,1,0xfe,0xc8,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opdec,0,0x48,0x00,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
opdec,0,0x48,0x00,0x00,reg16|memref,none,none,Ifirstval|Ical1|Icalreg,
/* divide */
opdiv,1,0xf6,0xf0,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opdiv,1,0xf7,0xf0,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
/* halt */
ophlt,1,0xf4,0x00,0x00,none,none,none,Inothing,
/* integer divide */
opidiv,1,0xf6,0xf8,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opidiv,1,0xf7,0xf8,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
/* integer multiply */
opimul,1,0xf6,0xe8,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opimul,1,0xf7,0xe8,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
/* in */
/* this could be a slight flaw */
opin,1,0xe4,0x00,0x00,regal,immed8,none,Iimmedsecond,
opin,1,0xec,0x00,0x00,regal,regdx,none,Inothing,
opin,1,0xe5,0x00,0x00,regax,immed16,none,Iimmedsecond,
opin,1,0xed,0x00,0x00,regax,regdx,none,Inothing,
/* inc */
opinc,1,0xfe,0xc0,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opinc,0,0x40,0x00,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
opinc,0,0x40,0x00,0x00,reg16|memref,none,none,Ifirstval|Icalreg,
/* issue interrupt */
opint,1,0xcd,0x00,0x00,immed16,none,none,Iimmedfirst|Iwrite8,
/* interrupt return */
opiret,1,0xcf,0x00,0x00,none,none,none,Inothing,
/* basic jump */
opjmp,1,0xe9,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump,
opjmp,1,0xea,0x00,0x00,pointer,none,none,Iimmedfirst,
opjmpf,1,0xff,0x2e,0x00,reg16|memref,none,none,Ifirstval|Icalreg,
/* comparitive jumps */
opja, 1,0x77,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjae,1,0x73,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjb, 1,0x72,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjbe,1,0x76,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjc, 1,0x72,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjcxz,1,0xe3,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opje, 1,0x74,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjg, 1,0x7f,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjge,1,0x7d,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjl, 1,0x7c,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjle,1,0x7e,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjna,1,0x76,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjnae,1,0x72,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjnb,1,0x73,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjnbe,1,0x77,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjnc,1,0x73,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjne,1,0x75,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjng,1,0x7e,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjnge,1,0x7c,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjnl,1,0x7d,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjnle,1,0x7f,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjno,1,0x71,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjnp,1,0x7b,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjns,1,0x79,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjnz,1,0x75,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjo, 1,0x70,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjp, 1,0x7a,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjpe,1,0x7a,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjpo,1,0x7b,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjs, 1,0x78,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
opjz, 1,0x74,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
/* lahf */
oplahf,1,0x9f,0x00,0x00,none,none,none,Inothing,
/* lds */
oplds,1,0xc5,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
/*les*/
oplds,1,0x8d,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
/* les */
oples,1,0xc4,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
/* loads */
oplodsb,1,0xac,0x00,0x00,none,none,none,Inothing,
oplodsw,1,0xad,0x00,0x00,none,none,none,Inothing,
/* loops */
oploop,1,0xe2,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
oploope,1,0xe1,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
oploopne,1,0xe0,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
oploopnz,1,0xe0,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
oploopz,1,0xe1,0x00,0x00,immed16,none,none,Iimmedfirst|Ijump|Iwrite8,
/* from reg to mem */
/* 8 bit two byte operands should be rewritten */
opmov,1,0x88,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
/* 16 bit */
opmov,1,0x89,0x00,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg,
/* 8 and 16 bit register moves */
opmov,1,0x8a,0x00,0x00,reg8 ,reg8,none,Ifirstval|Isecondval|Icalreg,
opmov,1,0x8b,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opmov,1,0x8e,0x00,0x00,seg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opmov,1,0x8c,0x00,0x00,reg16,seg16,none,Ifirstval|Isecondval|Icalreg|Iswapval,
/* from mem to reg */
/* 8bit */
opmov,1,0x8a,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
/* 16 bit */
opmov,1,0x8b,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
/* 8 bit immediate moves */
opmov,0,0xb0,0x00,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
/* 16 bit immediate moves */
opmov,0,0xb8,0x00,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opmov,1,0xc7,0x00,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
opmov,1,0xc6,0x00,0x00,reg16|memref,immed8,none,Ifirstval|Icalreg|Iimmedsecond,
/* string moves */
opmovsb,1,0xa4,0x00,0x00,none,none,none,Inothing,
opmovsw,1,0xa5,0x00,0x00,none,none,none,Inothing,
/* multiply */
opmul,1,0xf6,0xe0,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opmul,1,0xf7,0xe0,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
/* negative */
opneg,1,0xf6,0xd8,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opneg,1,0xf7,0xd8,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
/* no operation */
opnop,1,0x90,0x00,0x00,none,none,none,Inothing,
/* not */
opnot,1,0xf6,0xd0,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opnot,1,0xf7,0xd0,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
/* or */
opor,1,0x0c,0x00,0x00,regal,immed8,none,Iimmedsecond,
opor,1,0x0d,0x00,0x00,regax,immed16,none,Iimmedsecond,
opor,1,0x80,0xc8,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opor,1,0x08,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
opor,1,0x81,0xc8,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opor,1,0x09,0x00,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg,
opor,1,0x0a,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
opor,1,0x0a,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opor,1,0x0b,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opor,1,0x0b,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opor,1,0x81,0x08,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
opor,1,0x80,0x08,0x00,reg16|memref,immed8,none,Ifirstval|Icalreg|Iimmedsecond,
/* out */
opout,1,0xe6,0x00,0x00,immed16,regal,none,Iimmedsecond|Iwrite8,
opout,1,0xee,0x00,0x00,regdx,regal,none,Inothing,
opout,1,0xe7,0x00,0x00,immed16,regax,none,Iimmedsecond,
opout,1,0xef,0x00,0x00,regdx,regax,none,Inothing,
/* pop */
oppop,0,0x07,0x00,0x00,seg16,none,none,Ifirstval|Ical2|Icalreg,
oppop,0,0x58,0x00,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
oppop,1,0x8f,0x00,0x00,reg16|memref,none,none,Ifirstval|Icalreg,
oppopf,1,0x9d,0x00,0x00,none,none,none,Inothing,
/* push */
oppush,0,0x06,0x00,0x00,seg16,none,none,Ifirstval|Ical2|Icalreg,
oppush,0,0x50,0x00,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
oppush,1,0xff,0x30,0x00,reg16|memref,none,none,Ifirstval|Icalreg,
oppushf,1,0x9c,0x00,0x00,none,none,none,Inothing,
/* rotate left through carry */
oprcl,1,0xd0,0xd0,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
oprcl,1,0xd2,0xd0,0x00,reg8,regcl,none,Ifirstval|Ical1|Icalreg,
oprcl,1,0xd1,0xd0,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
oprcl,1,0xd3,0xd0,0x00,reg16,regcl,none,Ifirstval|Ical1|Icalreg,
/* rotate right through carry */
oprcr,1,0xd0,0xd8,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
oprcr,1,0xd2,0xd8,0x00,reg8,regcl,none,Ifirstval|Ical1|Icalreg,
oprcr,1,0xd1,0xd8,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
oprcr,1,0xd3,0xd8,0x00,reg16,regcl,none,Ifirstval|Ical1|Icalreg,
/* repeat */
oprep,1,0xf3,0x00,0x00,none,none,none,Inothing,
oprepe,1,0xf3,0x00,0x00,none,none,none,Inothing,
oprepne,1,0xf2,0x00,0x00,none,none,none,Inothing,
oprepnz,1,0xf2,0x00,0x00,none,none,none,Inothing,
oprepz,1,0xf3,0x00,0x00,none,none,none,Inothing,
/* return */
opretf,1,0xcb,0x00,0x00,none,none,none,Inothing,
opret,1,0xc2,0x00,0x00,immed16,none,none,Iimmedfirst,
opret,1,0xc3,0x00,0x00,none,none,none,Inothing,
/* rotate left */
oprol,1,0xd0,0xc0,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
oprol,1,0xd2,0xc0,0x00,reg8,regcl,none,Ifirstval|Ical1|Icalreg,
oprol,1,0xd1,0xc0,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
oprol,1,0xd3,0xc0,0x00,reg16,regcl,none,Ifirstval|Ical1|Icalreg,
/* rotate right */
opror,1,0xd0,0xc8,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opror,1,0xd2,0xc8,0x00,reg8,regcl,none,Ifirstval|Ical1|Icalreg,
opror,1,0xd1,0xc8,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
opror,1,0xd3,0xc8,0x00,reg16,regcl,none,Ifirstval|Ical1|Icalreg,
/* store flags in ah */
opsahf,1,0x9e,0x00,0x00,none,none,none,Inothing,
/* arithmetic shift left */
opsal,1,0xd0,0xe0,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opsal,1,0xd2,0xe0,0x00,reg8,regcl,none,Ifirstval|Ical1|Icalreg,
opsal,1,0xd1,0xe0,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
opsal,1,0xd3,0xe0,0x00,reg16,regcl,none,Ifirstval|Ical1|Icalreg,
/* arithmetic shift right */
opsar,1,0xd0,0xf8,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opsar,1,0xd2,0xf8,0x00,reg8,regcl,none,Ifirstval|Ical1|Icalreg,
opsar,1,0xd1,0xf8,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
opsar,1,0xd3,0xf8,0x00,reg16,regcl,none,Ifirstval|Ical1|Icalreg,
/* sbb */
opsbb,1,0x1c,0x00,0x00,regal,immed8,none,Iimmedsecond,
opsbb,1,0x1d,0x00,0x00,regax,immed16,none,Iimmedsecond,
opsbb,1,0x80,0xd8,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opsbb,1,0x18,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
opsbb,1,0x81,0xd8,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opsbb,1,0x19,0x00,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg,
opsbb,1,0x1a,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
opsbb,1,0x1a,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opsbb,1,0x1b,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opsbb,1,0x1b,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opsbb,1,0x81,0x18,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
opsbb,1,0x80,0x18,0x00,reg16|memref,immed8,none,Ifirstval|Icalreg|Iimmedsecond,
/* compares */
opscasb,1,0xae,0x00,0x00,none,none,none,Inothing,
opscasw,1,0xaf,0x00,0x00,none,none,none,Inothing,
/* shift left */
opshl,1,0xc0,0xe0,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opshl,1,0xc1,0xe0,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond|Iwrite8,
opshl,1,0xd2,0xe0,0x00,reg8,regcl,none,Ifirstval|Ical1|Icalreg,
opshl,1,0xd0,0xe0,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opshl,1,0xd3,0xe0,0x00,reg16,regcl,none,Ifirstval|Ical1|Icalreg,
opshl,1,0xd1,0xe0,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
/* shift right */
/* I know that these are 286 instructions, but I had to have them */
opshr,1,0xc0,0xe8,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opshr,1,0xc1,0xe8,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond|Iwrite8,
opshr,1,0xd2,0xe8,0x00,reg8,regcl,none,Ifirstval|Ical1|Icalreg,
opshr,1,0xd0,0xe8,0x00,reg8,none,none,Ifirstval|Ical1|Icalreg,
opshr,1,0xd3,0xe8,0x00,reg16,regcl,none,Ifirstval|Ical1|Icalreg,
opshr,1,0xd1,0xe8,0x00,reg16,none,none,Ifirstval|Ical1|Icalreg,
/* set flags */
opstc,1,0xf9,0x00,0x00,none,none,none,Inothing,
opstd,1,0xfd,0x00,0x00,none,none,none,Inothing,
opsti,1,0xfb,0x00,0x00,none,none,none,Inothing,
/* store */
opstosb,1,0xaa,0x00,0x00,none,none,none,Inothing,
opstosw,1,0xab,0x00,0x00,none,none,none,Inothing,
/* sub */
opsub,1,0x2c,0x00,0x00,regal,immed8,none,Iimmedsecond,
opsub,1,0x2d,0x00,0x00,regax,immed16,none,Iimmedsecond,
opsub,1,0x80,0xe8,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opsub,1,0x28,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
opsub,1,0x81,0xe8,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opsub,1,0x29,0x00,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg,
opsub,1,0x2a,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
opsub,1,0x2a,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opsub,1,0x2b,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opsub,1,0x2b,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opsub,1,0x81,0x28,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
opsub,1,0x80,0x28,0x00,reg16|memref,immed8,none,Ifirstval|Icalreg|Iimmedsecond,
/* test */
optest,1,0xa8,0x00,0x00,regal,immed8,none,Iimmedsecond,
optest,1,0xa9,0x00,0x00,regax,immed16,none,Iimmedsecond,
optest,1,0xf6,0xc0,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
optest,1,0x84,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
optest,1,0xf7,0xc0,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
optest,1,0x85,0x00,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg|Iimmedfirst,
optest,1,0x84,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
optest,1,0x84,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
optest,1,0x85,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
optest,1,0x85,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
optest,1,0xf7,0x00,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
/* wait */
opwait,1,0x9b,0x00,0x00,none,none,none,Inothing,
/* exchange */
opxchg,0,0x90,0x00,0x00,regax,reg16,none,Ifirstval|Ical1|Icalreg,
opxchg,1,0x86,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
opxchg,1,0x87,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
/* translate */
opxlat,1,0xd7,0x00,0x00,none,none,none,Inothing,
/* xor */
opxor,1,0x34,0x00,0x00,regal,immed8,none,Iimmedsecond,
opxor,1,0x35,0x00,0x00,regax,immed16,none,Iimmedsecond,
opxor,1,0x80,0xe8,0x00,reg8,immed8,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opxor,1,0x30,0x00,0x00,reg16|memref,reg8,none,Ifirstval|Isecondval|Icalreg,
opxor,1,0x81,0xe8,0x00,reg16,immed16,none,Ifirstval|Ical1|Icalreg|Iimmedsecond,
opxor,1,0x31,0x00,0x00,reg16|memref,reg16,none,Ifirstval|Isecondval|Icalreg,
opxor,1,0x32,0x00,0x00,reg8,reg8,none,Ifirstval|Isecondval|Icalreg,
opxor,1,0x32,0x00,0x00,reg8,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opxor,1,0x33,0x00,0x00,reg16,reg16,none,Ifirstval|Isecondval|Icalreg,
opxor,1,0x33,0x00,0x00,reg16,reg16|memref,none,Ifirstval|Isecondval|Icalreg,
opxor,1,0x81,0x30,0x00,reg16|memref,immed16,none,Ifirstval|Icalreg|Iimmedsecond,
opxor,1,0x80,0x30,0x00,reg16|memref,immed8,none,Ifirstval|Icalreg|Iimmedsecond,
op32bit,1,0x66,0x00,0x00,none,none,none,Inothing
};
unsigned char cal1reg(unsigned long val1)
{
unsigned char firstregvalue=0;
int j;
for (j=0;j<NUMREGS;j++)
if ((val1 & 0x0000fff0) == (registers[j].flag & 0x0000fff0))
firstregvalue = registers[j].value;
return (firstregvalue);
}
unsigned char cal2reg(unsigned long val1)
{
unsigned char firstregvalue=0;
int j;
for (j=0;j<NUMREGS;j++)
if ((val1 & 0x0000fff0) == (registers[j].flag & 0x0000fff0))
firstregvalue = registers[j].value;
return (firstregvalue << 3);
}
/* determine if register can be mem referenced */
unsigned char ismemreg(unsigned char reg)
{
if (reg == 3) /* bx */
return 0x07;
else
if (reg == 5) /* bp */
return 0x06;
else
if (reg == 7) /* di */
return 0x05;
else
if (reg == 6) /* si */
return 0x04;
else
if (reg != 0)
{
printf("** invalid memory register ** ");
errorflag = 1;
return 0;
}
return 0x06;
}
/* can have more than one register in mem ref */
unsigned char addsecondval(unsigned char val1,unsigned char val2)
{
unsigned char tmp;
if (val1 < val2)
{
tmp = val1;
val1 = val2;
val2 = tmp;
}
if (val1 == 0x07 && val2 == 0x04) /* bx+si */
return 0x00;
else
if (val1 == 0x07 && val2 == 0x05) /* bx+di */
return 0x01;
else
if (val1 == 0x06 && val2 == 0x04) /* bp+si */
return 0x02;
else
if (val1 == 0x06 && val2 == 0x05) /* bp+di */
return 0x03;
else
{
printf("** invalid memory register combination ** ");
errorflag = 1;
return 0;
}
}
/* This may be a bit sloppy, it's possibly slow and I could replace
it with a table, but for now it works */
unsigned char calculateregvalue(unsigned long val1,unsigned long val2,
unsigned short * instruct)
{
unsigned char firstregvalue=0,secondregvalue=0;
unsigned char ret;
int j;
/* get the first operand */
for (j=0;j<NUMREGS;j++)
if ((val1 & 0x0000fff0) == (registers[j].flag & 0x0000fff0))
firstregvalue = registers[j].value;
for (j=0;j<NUMREGS;j++)
if ((val2 & 0x0000fff0) == (registers[j].flag & 0x0000fff0))
secondregvalue = registers[j].value;
/* first register is a memory reference, so calculate it's value */
if (val1 & memref)
{
ret = ismemreg(firstregvalue);
if (memreg2val)
ret = addsecondval(ret,ismemreg(memreg2val));
ret = secondregvalue << 3 | ret;
if (firstregvalue == 0)
*instruct |= Iimmedfirst;
else
if (memimmediate > 0xff)
{
*instruct |= Iimmedfirst;
ret |= 0x80;
}
else
if (memimmediate != 0 || firstregvalue == 0x05)
{
ret |= 0x40;
*instruct |= Iimmedfirst;
*instruct |= Iwrite8;
}
return ret;
}
else
/* second register is a memory reference, so calculate it's value */
if (val2 & memref)
{
ret = ismemreg(secondregvalue);
if (memreg2val)
ret = addsecondval(ret,ismemreg(memreg2val));
ret = firstregvalue << 3 | ret;
/* mem immediate */
if (secondregvalue == 0)
*instruct |= Iimmedsecond;
else
if (memimmediate > 0xff)
{
ret |= 0x80;
*instruct |= Iimmedsecond;
}
else
if (memimmediate != 0 || secondregvalue == 0x05)
{
ret |= 0x40;
*instruct |= Iimmedsecond;
*instruct |= Iwrite8;
}
return ret;
}
/* it's just a register combination */
else
return (((firstregvalue << 3 | secondregvalue)& 0x3f) | 0xc0);
}
/* get the length of a string */
char stringlen(char * source)
{
int i = 0;
while (source[i]!=0) i++;
return i;
}
/* check to see if sub-string is in the string at the current dest */
char matches(char *source,char *dest)
{
int i,j=0;
if (source == NULL)
printf("1\n");
for (i=0;source[i] != 32 && source[i] != 9 && source[i] != ']'&&
source[i] != '+' && source[i] != '-' && source[i] != 0x0d
&& source[i] != 0x0a && source[i] != 0 && source[i] != ','
&& source[i] != ':' && source[i] != '('&& source[i] != '['&&
source[i] != '*' && source[i] != '/' && source[i] != ';'
;i++)
if (lower(source[i]) != lower(dest[i]))
return 0;
while (dest[j]!=0 && dest[j]!=']') j++;
if (i<j)
return 0;
else
return 1;
}
/* forward reference */
unsigned long getlabel(char **tmp);
/* parse out a value from a string */
unsigned long getval(char **input,int pass)
{
unsigned long ret = 0;
char neg = 0,hex = 0;
if (**input == '+')(*input)++;
else
if (**input == '-'){(*input)++;neg=1;}
if (**input == '?'){(*input)++;return 0;}
if (**input == '$'){(*input)++;return offset;}
if (**input == '@' && pass == 2) return getlabel(input);
if (**input == '0'){(*input)++;hex=1;}
if (**input == '@' && pass == 1)
{
while (**input != 0 && **input != 0x0a && **input != ']'
&& **input !=';' && **input != 32 && **input != 9
&& **input != '+' && **input != '-' && **input != '*' &&
**input != '/' && **input != ';')
(*input)++;
return 0xffff;
}
/* ran across a character quote */
if (**input == 39)
{
(*input)++;
ret = (unsigned long)(**input);
(*input)++;
if (**input != 39)
{
ret = ((unsigned long)(**input) << 8) + ret;
(*input)++;
}
if (**input != 39)
{
printf("** no closing quote on character ** ");
errorflag = 1;
}
(*input)++;
}
else
while (**input != ']' && **input != ',' && **input != 32 && **input != 0x0d
&& **input != 0x0a && **input != 0 && **input != 9
&& **input != ')' && **input != '+' && **input != '-' &&
**input != '/' && **input != '*' && **input != ';')
{
if ((**input|0x20)!= 'h')
{
/* convert a dec value to a hex value */
if (((**input | 0x20) >= ('a')) && ((**input | 0x20) <= ('f'))
&& !hex)
{
unsigned short oldret;
int i;
oldret = ret;
ret = (short)0;
i = 0;
while (oldret)
{
ret = (short)(ret + ((oldret % 10) << (i*4)));
oldret /= 10;
i++;
}
hex = 1;
}
/* pointer reference */
if (**input == ':')
{
PointerRef = 1;
ret <<= 16;
(*input)++;
}
else
/* calculate the value */
if (hex)
ret = (int)(ret << 4 | ((**input<'A')?((**input-'0')%10) : (((**input | 0x20)-('A'-10))%16)));
else
if (**input >= '0' && **input <= '9')
ret = (int)(ret * 10 + ((**input - '0')%10));
else
{
printf("** invalid immediate ** ");
errorflag = 1;
return 0;
}
}
else
if (!hex) /* if calculated in B10, but in B16 */
{
unsigned short oldret;
int i;
oldret = ret;
ret = (short)0;
i = 0;
while (oldret)
{
ret = (short)(ret + ((oldret % 10) << (i*4)));
oldret /= 10;
i++;
}
}
(*input)++;
}
if (neg)
ret = (~ret)+1;
return ret;
}
void writebuffer(const void *ptr,int size,int count,FILE *fp)
{
int i;
for (i = 0;i < (size*count);i++)
{
wbuffer[buffpos++] = ((char *)ptr)[i];
if (buffpos == WRITEBUFFERSIZE)
{
fwrite(wbuffer,WRITEBUFFERSIZE,1,fp) ;
buffpos = 0;
}
}
}
/* insert equate value into string */
char resolveequate(char *tmp,int pass)
{
tetable * next = etable;
int len,i;
char *lastpos,offsetflag = 0;
char filler[]="[0ffff]";
if (matches(tmp,"dup"))
return 2;
/* looking for an offset ? */
if (matches(tmp,"offset"))
{
lastpos = tmp;
len = 6;
while(*(tmp+len))
{
*tmp = *(tmp+len);
tmp++;
}
*tmp = 0;
tmp = lastpos;
while ((*tmp) == 32 || (*tmp) == 9 || (*tmp) == 0x0d)
tmp++;
offsetflag = 1;
}
for (i=0;i<NUMOPCODES;i++)
if (matches(tmp,str_opcodes[i].name))
return 2;
while (next != NULL && !matches(tmp,next->name))
next = next->next;
if (next)
{
/* get rid of old data */
lastpos = tmp;
len = stringlen(next->name);
while(*(tmp+len))
{
*tmp = *(tmp+len);
tmp++;
}
*tmp = 0;
/* insert new data */
len = stringlen(next->value);
/* are we looking for an offset? */
if (offsetflag)
{
len -= 2;
if (!next->flag)
return 0;
next->value++;
}
while( (tmp) != lastpos )
{
*(tmp+len) = *tmp;
tmp --;
}
*(tmp+len) = *tmp;
for (i=0;i<len;i++)
tmp[i] = next->value[i];
if (offsetflag) /* correct the offset */
next->value--;
}
else
if (pass == 1)
{
lastpos = tmp;
for (len=0 ;(tmp[len] != 32 && tmp[len] != 9 && tmp[len] != 0x0d
&& tmp[len] != 0 && tmp[len] != ',' && tmp[len] != ';'
&& tmp[len] != ']');len++);
while(*(tmp+len))
{
*tmp = *(tmp+len);
tmp++;
}
*tmp = 0;
/* insert new data */
len = stringlen(filler);
/* are we looking for an offset? */
while( (tmp) != lastpos )
{
*(tmp+len) = *tmp;
tmp --;
}
lastpos=filler;
if (offsetflag)
{
len -= 2;
lastpos++;
}
*(tmp+len) = *tmp;
for (i=0;i<len;i++)
tmp[i] = lastpos[i];
}
else
return 0;
return 1;
}
char addequate(char ** label,int pass)
{
static char buffer[256],buffer2[256];
int i,j,datalabel;
i = 0;
j = 0;
datalabel = 0;
while (**label != 32 && **label != 9 && **label != '=')
{
buffer[i] = **label;
i++;
(*label)++;
}
buffer[i] = 0;
while (**label == 32 || **label == 9) (*label)++;
if (matches(*label,"equ"))
(*label) +=3;
else
if ((**label) == '=')
(*label)++;
else
/* see if it is a label */
if (matches(*label,"db") || matches(*label,"dw"))
datalabel = 1;
else
return 0;
/* it's a label, so fill it whith an offset */
while (**label == 32 || **label == 9) (*label)++;
if (datalabel)
{
buffer2[0] = '[';
itoa(offset,&(buffer2[1]),10);
j = stringlen(buffer2);
buffer2[j] = ']';
buffer2[j+1] = 0;
}
else
/* else it's an equate, so fill it with it's value */
{
while (**label != ';' && **label != 0x0d
&& **label != 0x0a && **label != 0)
{
if (**label == '$')
{
itoa(offset,&(buffer2[j]),10);
j = stringlen(buffer2);
}
else
{
buffer2[j] = **label;
j++;
}
(*label)++;
}
buffer2[j] = 32;
while (buffer2[j] == 32 || buffer2[j] == 9)
buffer2[j--] = 0;
}
/* no table, make new one */
if (etable == NULL)
{
/* allocate mem for equate link */
if (!(etable = (tetable *)malloc(sizeof(tetable))))
{
printf("!! OUCH, I'm out of memory !! ");
errorflag = 1;
return 0;
}
etable->next = NULL;
/* allocate mem for equate name */
j=stringlen(buffer)+1;