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Copy path386.ORTool.Mod.txt
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386.ORTool.Mod.txt
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MODULE ORTool; (*NW 18.2.2013*)
IMPORT SYSTEM, Files, Texts, Oberon, ORB;
(*disassembler based on DevDecoder386 from BlackBox Component Builder 1.7.2*)
CONST
(* prefix *)
pCS = 2EH; pDS = 3EH; pES = 26H; pFS = 64H; pGS = 65H; pSS = 36H;
AdrSize = 67H; OpSize = 66H; none = -1;
(* addressing modes *)
Reg = 0; (* Register *)
Mem1 = 1; (* addressing mode 1 *)
Mem2 = 2; (* addressing mode 2 *)
RegImm = 3; (* immediate to register *)
MemImm = 4; (* memory to register *)
MemFull = 5; (* full 32 bit adr *)
(* i386 Register *)
EAX = 0; ECX = 1; EDX = 2; EBX = 3; ESP = 4; EBP = 5; ESI = 6; EDI = 7; (* 32 bit register *)
AX = 0; CX = 1; DX = 2; BX = 3; SP = 4; BP = 5; SI = 6; DI = 7; (* 16 bit register *)
AL = 0; CL = 1; DL = 2; BL = 3; AH = 4; CH = 5; DH = 6; BH = 7; (* 8 bit register *)
ES = 20; CS = 21; SS = 22; DS = 23; FS = 24; GS = 25; (* 6, 7 reserved *) (* Segment register *)
CR = 0; DR = 8; TR = 16;
(* i387 *)
SReal = 0; (* single real 32 bit*)
LReal = 1; (* long real 64 bit *)
EReal = 2; (* extended real 80 bit *)
WInt = 3; (* word integer 16 bit *)
SInt = 4; (* single integer 32 bit *)
LInt = 5; (* long integer 64 bit *)
Byte14 = 6; Byte28 = 7; Byte94 = 8; Byte108 = 9;
Decimal = 10; (* BCD *)
nothing = 11;
VAR W: Texts.Writer;
Form: INTEGER; (*result of ReadType*)
pc, op, column, prefix, w, cs: INTEGER;
adrPrefix, opPrefix: BOOLEAN;
inp: Files.Rider;
PROCEDURE Read(VAR R: Files.Rider; VAR n: INTEGER);
VAR b: BYTE;
BEGIN Files.ReadByte(R, b);
IF b < 80H THEN n := b ELSE n := b - 100H END
END Read;
PROCEDURE ReadType(VAR R: Files.Rider);
VAR key, len, lev, size, off: INTEGER;
ref, mno, class, form, readonly: INTEGER;
name, modname: ARRAY 32 OF CHAR;
BEGIN Read(R, ref); Texts.Write(W, " "); Texts.Write(W, "[");
IF ref < 0 THEN Texts.Write(W, "^"); Texts.WriteInt(W, -ref, 1)
ELSE Texts.WriteInt(W, ref, 1);
Read(R, form); Texts.WriteString(W, " form = "); Texts.WriteInt(W, form, 1);
IF form = ORB.Pointer THEN ReadType(R)
ELSIF form = ORB.Array THEN
ReadType(R); Files.ReadNum(R, len); Files.ReadNum(R, size);
Texts.WriteString(W, " len = "); Texts.WriteInt(W, len, 1);
Texts.WriteString(W, " size = "); Texts.WriteInt(W, size, 1)
ELSIF form = ORB.Record THEN
ReadType(R); (*base type*)
Files.ReadNum(R, off); Texts.WriteString(W, " exno = "); Texts.WriteInt(W, off, 1);
Files.ReadNum(R, off); Texts.WriteString(W, " extlev = "); Texts.WriteInt(W, off, 1);
Files.ReadNum(R, size); Texts.WriteString(W, " size = "); Texts.WriteInt(W, size, 1);
Texts.Write(W, " "); Texts.Write(W, "{"); Read(R, class);
WHILE class # 0 DO (*fields*)
Files.ReadString(R, name);
IF name[0] # 0X THEN Texts.Write(W, " "); Texts.WriteString(W, name); ReadType(R)
ELSE Texts.WriteString(W, " --")
END ;
Files.ReadNum(R, off); Texts.WriteInt(W, off, 4); Read(R, class)
END ;
Texts.Write(W, "}")
ELSIF form = ORB.Proc THEN
ReadType(R); Texts.Write(W, "("); Read(R, class);
WHILE class # 0 DO
Texts.WriteString(W, " class = "); Texts.WriteInt(W, class, 1); Read(R, readonly);
IF readonly = 1 THEN Texts.Write(W, "#") END ;
ReadType(R); Read(R, class)
END ;
Texts.Write(W, ")")
END ;
Files.ReadString(R, modname);
IF modname[0] # 0X THEN
Files.ReadInt(R, key); Files.ReadString(R, name);
Texts.Write(W, " "); Texts.WriteString(W, modname); Texts.Write(W, "."); Texts.WriteString(W, name);
Texts.WriteHex(W, key)
END
END ;
Form := form; Texts.Write(W, "]")
END ReadType;
PROCEDURE DecSym*; (*decode symbol file*)
VAR class, typno, k: INTEGER;
name: ARRAY 32 OF CHAR;
F: Files.File; R: Files.Rider;
S: Texts.Scanner;
BEGIN Texts.OpenScanner(S, Oberon.Par.text, Oberon.Par.pos); Texts.Scan(S);
IF S.class = Texts.Name THEN
Texts.WriteString(W, "OR-decode "); Texts.WriteString(W, S.s);
Texts.WriteLn(W); Texts.Append(Oberon.Log, W.buf);
F := Files.Old(S.s);
IF F # NIL THEN
Files.Set(R, F, 0); Files.ReadInt(R, k); Files.ReadInt(R, k);
Files.ReadString(R, name); Texts.WriteString(W, name); Texts.WriteHex(W, k);
Read(R, class); Texts.WriteInt(W, class, 3); (*sym file version*)
IF class = ORB.versionkey THEN
Texts.WriteLn(W); Read(R, class);
WHILE class # 0 DO
Texts.WriteInt(W, class, 4); Files.ReadString(R, name); Texts.Write(W, " "); Texts.WriteString(W, name);
ReadType(R);
IF class = ORB.Typ THEN
Texts.Write(W, "("); Read(R, class);
WHILE class # 0 DO (*pointer base fixup*)
Texts.WriteString(W, " ->"); Texts.WriteInt(W, class, 4); Read(R, class)
END ;
Texts.Write(W, ")")
ELSIF (class = ORB.Const) OR (class = ORB.Var) THEN
Files.ReadNum(R, k); Texts.WriteInt(W, k, 5); (*Reals, Strings!*)
END ;
Texts.WriteLn(W); Texts.Append(Oberon.Log, W.buf);
Read(R, class)
END
ELSE Texts.WriteString(W, " bad symfile version")
END
ELSE Texts.WriteString(W, " not found")
END ;
Texts.WriteLn(W); Texts.Append(Oberon.Log, W.buf)
END
END DecSym;
(* ---------------------------------------------------*)
PROCEDURE Error;
BEGIN Texts.WriteLn(W); Texts.WriteString(W, "*** decode error ***")
END Error;
PROCEDURE Next (VAR b: BYTE);
BEGIN IF pc < cs THEN Files.ReadByte(inp, b) ELSE b := 0 END; INC(pc)
END Next;
PROCEDURE GetByte (VAR byte: INTEGER);
VAR b0: BYTE;
BEGIN Next(b0); byte:= b0
END GetByte;
PROCEDURE GetWord (VAR word: INTEGER);
VAR b0, b1: BYTE;
BEGIN Next(b0); Next(b1); word := b0 + b1 * 100H;
END GetWord;
PROCEDURE GetDWord (VAR dword: INTEGER);
VAR b0, b1, b2, b3: BYTE;
BEGIN Next(b0); Next(b1); Next(b2); Next(b3); dword := b0 + b1 * 100H + b2 * 10000H + b3 * (1000000H)
END GetDWord;
PROCEDURE WriteLn;
BEGIN Texts.WriteLn(W); column := 0
END WriteLn;
PROCEDURE WriteString (str: ARRAY OF CHAR);
BEGIN Texts.WriteString(W, str)
END WriteString;
PROCEDURE Write (ch: CHAR);
BEGIN Texts.Write(W, ch)
END Write;
PROCEDURE WriteComma;
BEGIN Texts.WriteString(W, ", ")
END WriteComma;
PROCEDURE WriteTab;
BEGIN Texts.Write(W, 9X); INC(column)
END WriteTab;
PROCEDURE WriteHex(x, n: INTEGER);
VAR i: INTEGER; y: LONGINT;
a: ARRAY 10 OF CHAR;
BEGIN i := 0;
REPEAT y := x MOD 10H;
IF y < 10 THEN a[i] := CHR(y + 30H) ELSE a[i] := CHR(y + 37H) END;
x := x DIV 10H MOD 10000000H; INC(i)
UNTIL x = 0;
WHILE n > i DO Texts.Write(W, "0"); DEC(n) END;
REPEAT DEC(i); Texts.Write(W, a[i]) UNTIL i = 0
END WriteHex;
(* write byte in hexadecimal form *)
PROCEDURE WriteByte (byte: INTEGER);
VAR a: ARRAY 10 OF CHAR; showBase: BOOLEAN; x, y, i, width: INTEGER;
BEGIN
showBase := column >= 2;
IF showBase THEN width := 3 ELSE width := 2 END;
WriteHex(byte, width);
IF showBase THEN Texts.Write(W, "H") END;
END WriteByte;
(* write word in byte form, little endian notation *)
PROCEDURE WriteWord (word: INTEGER);
BEGIN
WriteByte(word MOD 100H); Write(" ");
WriteByte(word DIV 100H MOD 100H)
END WriteWord;
(* write dword in byte form, little endian notation *)
PROCEDURE WriteDWord (dword: INTEGER);
BEGIN
WriteWord(dword MOD 10000H); Write(" ");
WriteWord(dword DIV 10000H MOD 10000H)
END WriteDWord;
(* write dword hexadecimal, with showBase = TRUE *)
PROCEDURE WriteDWHex (dword: INTEGER);
BEGIN WriteHex(dword, 9); Texts.Write(W, "H")
END WriteDWHex;
PROCEDURE WriteDisp (disp: INTEGER);
BEGIN Texts.WriteInt(W, disp, 0)
END WriteDisp;
PROCEDURE WriteOp (opStr: ARRAY OF CHAR);
BEGIN WriteTab; Texts.WriteString(W, opStr); Texts.WriteString(W, " ")
END WriteOp;
PROCEDURE WriteReg (reg: INTEGER);
(* w = 0: 8 bit; w = 1: 16/32 bit *)
BEGIN
IF reg >= ES (*DS*) THEN (* <<<< MH 15.3.1994 *)
IF reg = CS THEN WriteString("cs")
ELSIF reg = DS THEN WriteString("ds")
ELSIF reg = ES THEN WriteString("es")
ELSIF reg = SS THEN WriteString("ss")
ELSIF reg = FS THEN WriteString("fs")
ELSIF reg = GS THEN WriteString("gs")
ELSE Error
END
ELSIF w = 0 THEN
IF reg = 0 THEN WriteString("al")
ELSIF reg = 1 THEN WriteString("cl")
ELSIF reg = 2 THEN WriteString("dl")
ELSIF reg = 3 THEN WriteString("bl")
ELSIF reg = 4 THEN WriteString("ah")
ELSIF reg = 5 THEN WriteString("ch")
ELSIF reg = 6 THEN WriteString("dh")
ELSIF reg = 7 THEN WriteString("bh")
ELSE Error
END
ELSE
IF ~opPrefix THEN Write("e") END;
IF reg = 0 THEN WriteString("ax")
ELSIF reg = 1 THEN WriteString("cx")
ELSIF reg = 2 THEN WriteString("dx")
ELSIF reg = 3 THEN WriteString("bx")
ELSIF reg = 4 THEN WriteString("sp")
ELSIF reg = 5 THEN WriteString("bp")
ELSIF reg = 6 THEN WriteString("si")
ELSIF reg = 7 THEN WriteString("di")
ELSE Error
END
END
END WriteReg;
PROCEDURE WriteAdrReg(reg: INTEGER);
BEGIN
IF ~adrPrefix THEN Write("e") END;
IF reg = 0 THEN WriteString("ax")
ELSIF reg = 1 THEN WriteString("cx")
ELSIF reg = 2 THEN WriteString("dx")
ELSIF reg = 3 THEN WriteString("bx")
ELSIF reg = 4 THEN WriteString("sp")
ELSIF reg = 5 THEN WriteString("bp")
ELSIF reg = 6 THEN WriteString("si")
ELSIF reg = 7 THEN WriteString("di")
ELSE Error
END
END WriteAdrReg;
PROCEDURE WriteSpecialReg(reg: INTEGER);
BEGIN
IF reg >= TR THEN
WriteString("tr"); Write(CHR( reg-TR + ORD("0")))
ELSIF reg >= DR THEN
WriteString("dr"); Write(CHR( reg-DR + ORD("0")))
ELSE
WriteString("cr"); Write(CHR( reg-CR + ORD("0")))
END
END WriteSpecialReg;
PROCEDURE WritePrefix (prefix: INTEGER);
BEGIN
IF prefix = pCS THEN WriteString("CS:")
ELSIF prefix = pDS THEN WriteString("DS: ")
ELSIF prefix = pES THEN WriteString("ES: ")
ELSIF prefix = pFS THEN WriteString("FS: ")
ELSIF prefix = pGS THEN WriteString("GS: ")
ELSIF prefix = pSS THEN WriteString("SS: ")
ELSE
END
END WritePrefix;
PROCEDURE WriteRegReg (d, reg1, reg2: INTEGER);
BEGIN
IF d = 1 THEN
WriteReg(reg1); WriteComma; WriteReg(reg2)
ELSE
WriteReg(reg2); WriteComma; WriteReg(reg1)
END
END WriteRegReg;
PROCEDURE WriteMem (base, inx, scale, disp: INTEGER);
BEGIN
WritePrefix(prefix);
IF base # none THEN(* register relative *)
WriteDisp(disp);
Write("["); WriteAdrReg(base)
ELSE (* absolute *)
Write("["); WriteDisp(disp)
END ;
IF (inx # none) & ~((inx = ESP) & (base = ESP))(* !! 15.4.93 Bug? & (base # ESP) *) THEN (* indexed *)
WriteString(" + "); WriteDisp(LSL(1, scale)); WriteString(" * ");
WriteAdrReg(inx)
END ;
Write("]")
END WriteMem;
PROCEDURE WriteMem1 (d, reg, base, disp: INTEGER);
(* d = TRUE: reg, mem ; d = FALSE: mem, reg *)
BEGIN
IF d = 1 THEN
WriteReg(reg); WriteComma
END ;
WriteMem(base, none, 0, disp);
IF d = 0 THEN
WriteComma; WriteReg(reg)
END
END WriteMem1;
PROCEDURE WriteMem2 (d, reg, base, inx, scale, disp: INTEGER);
(* d = TRUE: reg, mem; d= FALSE: mem, reg *)
BEGIN
IF d = 1 THEN
WriteReg(reg); WriteComma
END ;
WriteMem(base, inx, scale, disp);
IF d = 0 THEN
WriteComma; WriteReg(reg)
END
END WriteMem2;
PROCEDURE WriteRegImm (reg, imm: INTEGER; hex: BOOLEAN);
BEGIN
WriteReg(reg); WriteComma;
IF hex THEN WriteDWHex(imm) ELSE WriteDisp(imm) END
END WriteRegImm;
PROCEDURE WriteMemImm (base, inx, scale, disp, imm: INTEGER; hex: BOOLEAN);
BEGIN
WritePrefix(prefix);
WriteMem(base, inx, scale, disp);
WriteComma;
IF hex THEN WriteDWHex(imm) ELSE WriteDisp(imm) END
END WriteMemImm;
PROCEDURE WriteRM (mode, d, reg, base, inx, scale, disp, imm: INTEGER; hex: BOOLEAN);
BEGIN
IF mode = RegImm THEN WriteRegImm(reg, imm, hex)
ELSIF mode = MemImm THEN WriteMemImm(base, inx, scale, disp, imm, hex)
ELSIF mode = Reg THEN WriteRegReg(d, reg, base)
ELSIF mode = Mem1 THEN WriteMem1(d, reg, base, disp)
ELSIF mode = Mem2 THEN WriteMem2(d, reg, base, inx, scale, disp)
ELSIF mode = MemFull THEN
IF d = 1 THEN
WriteReg(reg); WriteComma
END ;
WritePrefix(prefix);
Write("["); WriteDisp(disp); Write("]");
IF d = 0 THEN
WriteComma; WriteReg(reg)
END
ELSE Error
END
END WriteRM;
PROCEDURE GetImm (w: INTEGER; VAR imm: INTEGER);
VAR byte: INTEGER;
BEGIN
IF w = 0 THEN (* 8 bit *)
GetByte(byte); WriteByte(byte); Write(" ");
IF byte >= 128 THEN byte:= byte - 256 END ;
imm:= byte
ELSIF opPrefix THEN (* 16 bit *)
GetWord(imm); WriteWord(imm); Write(" ");
IF imm >= 32768 THEN imm:= imm - 65536 END
ELSE (* 32 bit *)
GetDWord(imm); WriteDWord(imm); Write(" ")
END
END GetImm;
PROCEDURE ModRm (VAR mode, reg, base, inx, scale, disp: INTEGER);
VAR mod, byte: INTEGER;
BEGIN
GetByte(byte); WriteByte(byte); Write(" ");
mod:= byte DIV 40H;
reg:=(byte DIV 8) MOD 8;
base:= byte MOD 8;
IF mod = 3 THEN (* reg *)
mode:= Reg; inx:= none
ELSE
IF base = 4 THEN (* escape to two bytes *)
mode:= Mem2;
GetByte(byte);
WriteByte(byte); Write(" ");
scale:= byte DIV 40H;
inx:= (byte DIV 8) MOD 8;
base:= byte MOD 8
ELSE (* one byte addressing mode *)
mode:= Mem1; inx:= none
END ;
IF mod = 0 THEN (* no displ, or 32 bit address *)
IF base = 5 THEN (* disp32 *)
base:= none;
GetDWord(disp);
WriteDWord(disp); Write(" ")
ELSE disp:= 0
END
ELSIF mod = 1 THEN (* 8 bit displ *)
GetImm(0, disp)
ELSE (* 32 bit displacement *)
GetDWord(disp);
WriteDWord(disp); Write(" ")
END
END
END ModRm;
PROCEDURE Type1 (op: INTEGER; VAR mode, d, reg, base, inx, scale, disp, imm: INTEGER);
(* type 1: add, or, adc, sbb, and, sub, xor, cmp *)
BEGIN
IF op = 4 THEN
mode:= RegImm; w:= 0; reg:= AL; GetImm(0, imm)
ELSIF op = 5 THEN
mode:= RegImm; w:= 1; reg:= AX; GetImm(1, imm)
ELSE
IF op = 0 THEN w:= 0; d:= 0
ELSIF op = 1 THEN w:= 1; d:= 0
ELSIF op = 2 THEN w:= 0; d:= 1
ELSIF op = 3 THEN w:= 1; d:= 1
ELSE Error
END ;
ModRm(mode, reg, base, inx, scale, disp)
END
END Type1;
PROCEDURE Add (op: INTEGER);
VAR reg, base, inx, d, scale, mode, disp, imm: INTEGER;
BEGIN
Type1(op, mode, d, reg, base, inx, scale, disp, imm);
WriteOp("add");
WriteRM(mode, d, reg, base, inx, scale, disp, imm, FALSE)
END Add;
PROCEDURE Push (op: INTEGER);
VAR imm: INTEGER;
BEGIN
w:= 1;
IF op = 60H THEN
IF opPrefix THEN WriteOp("pusha") ELSE WriteOp("pushad") END ;
ELSIF op = 68H THEN
IF adrPrefix THEN
GetWord(imm); WriteWord(imm)
ELSE
GetDWord(imm); WriteDWord(imm)
END ;
WriteOp("push"); WriteDisp(imm)
ELSIF op = 6AH THEN
GetImm(0, imm);
WriteOp("push"); WriteDisp(imm)
ELSIF op = 9CH THEN
IF opPrefix THEN WriteOp("pushf") ELSE WriteOp("pushfd") END ;
ELSE
WriteOp("push");
IF op = 6 THEN WriteReg(ES)
ELSIF op = 0EH THEN WriteReg(CS)
ELSIF op = 16H THEN WriteReg(SS)
ELSIF op = 1EH THEN WriteReg(DS)
ELSIF (op >= 50H) & (op <= 57H) THEN WriteReg(op - 50H)
ELSE Error
END
END
END Push;
PROCEDURE Push2 (op: INTEGER);
BEGIN Error (* not yet implemented *)
END Push2;
PROCEDURE Pop(op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN
IF op = 61H THEN
IF opPrefix THEN WriteOp("popa") ELSE WriteOp("popad") END ;
ELSIF op = 8FH THEN
ModRm(mode, reg, base, inx, scale, disp);
WriteOp("pop");
IF opPrefix THEN WriteString("word ptr ")
ELSE WriteString("dword ptr ")
END ;
WriteMem(base, inx, scale, disp)
ELSIF op = 9DH THEN
IF opPrefix THEN WriteOp("popf") ELSE WriteOp("popfd") END ;
ELSE
WriteOp("pop");
w := 1; (* pop takes only 16 or 32 bit ops *)
IF op = 7 THEN WriteReg(ES)
ELSIF op = 17H THEN WriteReg(SS)
ELSIF op = 1FH THEN WriteReg(DS)
ELSIF (op >= 58H) & (op <= 5FH) THEN WriteReg(op - 58H)
ELSE Error
END
END
END Pop;
PROCEDURE Pop2 (op: INTEGER);
BEGIN Error (* not yet implemented *)
END Pop2;
PROCEDURE Or (op: INTEGER);
VAR reg, base, inx, d, scale, mode, disp, imm: INTEGER;
BEGIN
Type1(op - 08H, mode, d, reg, base, inx, scale, disp, imm);
WriteOp("or");
WriteRM(mode, d, reg, base, inx, scale, disp, imm, TRUE)
END Or;
PROCEDURE Adc (op: INTEGER);
VAR reg, base, inx, d, scale, mode, disp, imm: INTEGER;
BEGIN
Type1(op -10H, mode, d, reg, base, inx, scale, disp, imm);
WriteOp("adc");
WriteRM(mode, d, reg, base, inx, scale, disp, imm, FALSE)
END Adc;
PROCEDURE Sbb (op: INTEGER);
VAR reg, base, inx, d, scale, mode, disp, imm: INTEGER;
BEGIN
Type1(op - 18H, mode, d, reg, base, inx, scale, disp, imm);
WriteOp("sbb");
WriteRM(mode, d, reg, base, inx, scale, disp, imm, FALSE)
END Sbb;
PROCEDURE And (op: INTEGER);
VAR reg, base, inx, d, scale, mode, disp, imm: INTEGER;
BEGIN
Type1(op - 20H, mode, d, reg, base, inx, scale, disp, imm);
WriteOp("and");
WriteRM(mode, d, reg, base, inx, scale, disp, imm, TRUE)
END And;
PROCEDURE Sub (op: INTEGER);
VAR reg, base, inx, d, scale, mode, disp, imm: INTEGER;
BEGIN
Type1(op - 28H, mode, d, reg, base, inx, scale, disp, imm);
WriteOp("sub");
WriteRM(mode, d, reg, base, inx, scale, disp, imm, FALSE)
END Sub;
PROCEDURE Xor (op: INTEGER);
VAR reg, base, inx, d, scale, mode, disp, imm: INTEGER;
BEGIN
Type1(op - 30H, mode, d, reg, base, inx, scale, disp, imm);
WriteOp("xor");
WriteRM(mode, d, reg, base, inx, scale, disp, imm, TRUE)
END Xor;
PROCEDURE Cmp (op: INTEGER);
VAR reg, base, inx, d, scale, mode, disp, imm: INTEGER;
BEGIN
Type1(op - 38H, mode, d, reg, base, inx, scale, disp, imm);
WriteOp("cmp");
WriteRM(mode, d, reg, base, inx, scale, disp, imm, FALSE)
END Cmp ;
PROCEDURE Inc (op: INTEGER);
BEGIN
WriteOp("inc"); w := 1; (* set width to 16/32 bits, bug2 *)
WriteReg(op - 40H)
END Inc;
PROCEDURE Dec (op: INTEGER);
BEGIN
WriteOp("dec");
WriteReg(op - 48H)
END Dec;
PROCEDURE Bound (op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN
w:= 1;
ModRm(mode, reg, base, inx, scale, disp);
WriteOp("bound");
WriteRM(mode, 1, reg, base, inx, scale, disp, 0, FALSE)
END Bound;
PROCEDURE Imul (op: INTEGER);
VAR reg, base, inx, scale, mode, disp, imm: INTEGER;
BEGIN
ModRm(mode, reg, base, inx, scale, disp);
w:= 1;
IF op = 69H THEN GetImm(1, imm)
ELSIF op = 6BH THEN GetImm(0, imm) (* sign extended *)
END ;
WriteOp("imul");
WriteRM(mode, 1, reg, base, inx, scale, disp, 0, FALSE);
WriteComma; WriteDisp(imm)
END Imul;
PROCEDURE Imul2 (op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN
w:= 1;
ModRm(mode, reg, base, inx, scale, disp);
WriteOp("imul");
WriteRM(mode, 1, reg, base, inx, scale, disp, 0, FALSE)
END Imul2;
PROCEDURE Ins (op: INTEGER);
BEGIN
IF op = 6CH THEN WriteOp("insb")
ELSIF opPrefix THEN WriteOp("insw")
ELSE WriteOp("insd")
END
END Ins;
PROCEDURE Outs (op: INTEGER);
BEGIN
IF op = 6EH THEN WriteOp("outsb")
ELSIF opPrefix THEN WriteOp("outsw")
ELSE WriteOp("outsd")
END
END Outs;
PROCEDURE Jcc (op: INTEGER);
VAR disp: INTEGER;
BEGIN
GetByte(disp); WriteByte(disp);
IF disp >= 128 THEN disp:= disp - 256 END ;
IF op = 70H THEN WriteOp("jo")
ELSIF op = 71H THEN WriteOp("jno")
ELSIF op = 72H THEN WriteOp("jb")
ELSIF op = 73H THEN WriteOp("jnb")
ELSIF op = 74H THEN WriteOp("jz")
ELSIF op = 75H THEN WriteOp("jnz")
ELSIF op = 76H THEN WriteOp("jbe")
ELSIF op = 77H THEN WriteOp("jnbe")
ELSIF op = 78H THEN WriteOp("js")
ELSIF op = 79H THEN WriteOp("jns")
ELSIF op = 7AH THEN WriteOp("jp")
ELSIF op = 7BH THEN WriteOp("jnp")
ELSIF op = 7CH THEN WriteOp("jl")
ELSIF op = 7DH THEN WriteOp("jnl")
ELSIF op = 7EH THEN WriteOp("jle")
ELSIF op = 7FH THEN WriteOp("jnle")
ELSE Error
END ;
WriteDisp(disp); WriteString(" ("); (*WriteDWHex(pc + disp);*) WriteDisp(pc + disp); Write(")")
END Jcc;
PROCEDURE Jcc2 (op: INTEGER);
VAR disp: INTEGER;
BEGIN
IF adrPrefix THEN
GetWord(disp); WriteWord(disp)
ELSE
GetDWord(disp); WriteDWord(disp)
END ;
IF op = 80H THEN WriteOp("jo")
ELSIF op = 81H THEN WriteOp("jno")
ELSIF op = 82H THEN WriteOp("jb")
ELSIF op = 83H THEN WriteOp("jnb")
ELSIF op = 84H THEN WriteOp("jz")
ELSIF op = 85H THEN WriteOp("jnz")
ELSIF op = 86H THEN WriteOp("jbe")
ELSIF op = 87H THEN WriteOp("jnbe")
ELSIF op = 88H THEN WriteOp("js")
ELSIF op = 89H THEN WriteOp("jns")
ELSIF op = 8AH THEN WriteOp("jp")
ELSIF op = 8BH THEN WriteOp("jnp")
ELSIF op = 8CH THEN WriteOp("jl")
ELSIF op = 8DH THEN WriteOp("jnl")
ELSIF op = 8EH THEN WriteOp("jle")
ELSIF op = 8FH THEN WriteOp("jnle")
ELSE Error
END ;
WriteDisp(disp); WriteString(" ("); (*WriteDWHex(pc + disp);*) WriteDisp(pc + disp); Write(")")
END Jcc2;
PROCEDURE Test (op: INTEGER);
VAR reg, base, inx, scale, mode, disp, imm: INTEGER;
BEGIN
IF (op = 0A8H) OR (op = 0A9H) THEN
IF op = 0A8H THEN
w:= 0; reg:= AL
ELSE
w:= 1; reg:= AX
END ;
GetImm(w, imm);
mode:= RegImm
ELSE
ModRm(mode, reg, base, inx, scale, disp);
IF op = 84H THEN w:= 0
ELSE w:= 1
END
END ;
WriteOp("test");
WriteRM(mode, 0, reg, base, inx, scale, disp, imm, FALSE) (* bug1 *)
END Test;
PROCEDURE Xchg (op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN
IF (op >= 91H) & (op <= 97H) THEN (* xchg .ax, reg *)
w:= 1; reg:= AX; base:= op MOD 8;
mode:= Reg
ELSE
ModRm(mode, reg, base, inx, scale, disp);
IF op = 86H THEN w:= 0
ELSE w:= 1
END
END ;
WriteOp("xchg");
WriteRM(mode, 1, reg, base, inx, scale, disp, 0, FALSE)
END Xchg;
PROCEDURE Mov (op: INTEGER);
VAR reg, base, inx, d, scale, mode, disp, imm: INTEGER;
BEGIN
IF (op >= 88H) & (op <= 8BH) THEN
Type1(op - 88H, mode, d, reg, base, inx, scale, disp, imm)
ELSIF (op >= 0B0H) & (op <= 0B7H) THEN
mode:= RegImm; w:= 0; reg:= op - 0B0H; GetImm(w, imm)
ELSIF (op >= 0B8H) & (op <= 0BFH) THEN
mode:= RegImm; w:= 1; reg:= op - 0B8H; GetImm(w, imm)
ELSIF (op >= 0A0H) & (op <= 0A3H) THEN
IF op = 0A0H THEN w:= 0; d:= 1; reg:= AL
ELSIF op = 0A1H THEN w:= 1; d:= 1; reg:= AX
ELSIF op = 0A2H THEN w:= 0; d:= 0; reg:= AL
ELSIF op = 0A3H THEN w:= 1; d:= 0; reg:= AX
END ;
mode:= MemFull;
IF adrPrefix THEN
GetWord(disp); WriteWord(disp)
ELSE
GetDWord(disp); WriteDWord(disp)
END
ELSIF op = 8CH THEN (* mov mem, seg *)
w:= 1; d:= 0; opPrefix:= TRUE;
ModRm(mode, reg, base, inx, scale, disp);
reg:= reg + ES (* reg is a segment register *)
ELSIF op = 8EH THEN (* mov seg, mem *)
w:= 1; d:= 1; opPrefix:= TRUE;
ModRm(mode, reg, base, inx, scale, disp);
reg:= reg + ES (* reg is segment register *)
ELSIF (op = 0C6H) OR (op = 0C7H) THEN
d:= 1;
IF op = 0C6H THEN w:= 0
ELSE w:= 1
END ;
ModRm(mode, reg, base, inx, scale, disp);
IF mode = Reg THEN
reg:= base; mode:= RegImm
ELSE mode:= MemImm
END ;
GetImm(w, imm)
END ;
WriteOp("mov");
WriteRM(mode, d, reg, base, inx, scale, disp, imm, FALSE)
END Mov;
PROCEDURE Mov2 (op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN (* reg, base only used, because Mov2 op codes contains special registers (debug/test/controll) *)
ModRm(mode, reg, base, inx, scale, disp);
WriteOp("mov");
IF op = 20H THEN WriteReg(base); WriteComma; WriteSpecialReg(CR+reg)
ELSIF op = 21H THEN WriteReg(base); WriteComma; WriteSpecialReg(DR+reg)
ELSIF op = 22H THEN WriteSpecialReg(CR+reg); WriteComma; WriteReg(base)
ELSIF op = 23H THEN WriteSpecialReg(DR+reg); WriteComma; WriteReg(base)
ELSIF op = 24H THEN WriteReg(base); WriteComma; WriteSpecialReg(TR+reg)
ELSIF op = 26H THEN WriteSpecialReg(TR+reg); WriteComma; WriteReg(base)
ELSE Error
END
END Mov2;
PROCEDURE Movzx (op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN
ModRm(mode, reg, base, inx, scale, disp);
WriteOp("movzx");
WriteReg(reg); WriteComma;
IF mode = Reg THEN WriteReg(base)
ELSE
IF op = 0B6H THEN WriteString("byte ptr ")
ELSE WriteString("word ptr ")
END ;
WriteMem(base, inx, scale, disp)
END
END Movzx;
PROCEDURE Movsx (op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN
ModRm(mode, reg, base, inx, scale, disp);
WriteOp("movsx");
w:= 1;
WriteReg(reg); WriteComma;
IF mode = Reg THEN
IF op = 0BEH THEN
w:= 0; WriteReg(base)
ELSE
w:= 1; opPrefix:= TRUE; WriteReg(base)
END ;
ELSE
IF op = 0BEH THEN WriteString("byte ptr ")
ELSE WriteString("word ptr ")
END ;
WriteMem(base, inx, scale, disp)
END
END Movsx;
PROCEDURE Lea (op: INTEGER);
VAR reg, base, inx, byte, trap, scale, mode, disp: INTEGER; end: BOOLEAN;
BEGIN
ModRm(mode, reg, base, inx, scale, disp); end := FALSE;
IF mode = Reg THEN
byte := 3 * 40H + reg * 8 + base; (* reconstruct 2nd byte *)
IF (byte = 0F0H) OR (byte >= 0E0H) & (byte <= 0EFH) THEN
WriteOp("illegal"); end := TRUE
END
(*IF byte = 0F0H THEN GetByte(trap); WriteByte(trap); WriteOp("illegal");
WriteString("(TRAP "); Texts.WriteInt(W, trap, 0); WriteString(")"); end := TRUE
ELSIF (byte > 0E0H) & (byte <= 0EFH) THEN WriteOp("illegal");
WriteString("(TRAP "); Texts.WriteInt(W, 0E0H - byte, 0); WriteString(")"); end := TRUE
END*)
END;
IF ~end THEN
w:= 1;
WriteOp("lea");
WriteRM(mode, 1, reg, base, inx, scale, disp, 0, TRUE)
END
END Lea;
PROCEDURE Call (op: INTEGER);
VAR imm, sel: INTEGER;
BEGIN
IF op = 0E8H THEN
IF adrPrefix THEN
GetWord(imm); WriteWord(imm)
ELSE
GetDWord(imm); WriteDWord(imm)
END
ELSE (* intrasegment *)
(* Update Start -- 7.08.96 prk *)
IF adrPrefix THEN
(* GetWord(sel); GetWord(imm);
WriteWord(sel); Write(" "); WriteWord(imm) *)
GetWord(imm); WriteWord(imm)
ELSE
(* GetWord(sel); GetDWord(imm);
WriteWord(sel); Write(" "); WriteDWord(imm) *)
GetDWord(imm); WriteDWord(imm)
END ;
GetWord(sel); Write(" "); WriteWord(sel);
(* Update End -- 7.08.96 prk *)
END ;
WriteOp("call");
IF op = 09AH THEN
WriteDisp(sel); Write(":")
END ;
WriteDisp(imm); WriteString(" ("); (*WriteDWHex(pc + imm);*) WriteDisp(pc + imm); Write(")")
END Call;
PROCEDURE Movs (op: INTEGER);
BEGIN
IF op = 0A4H THEN WriteOp("movsb")
ELSIF (op = 0A5H) & opPrefix THEN WriteOp("movsw")
ELSIF op = 0A5H THEN WriteOp("movsd")
ELSE Error
END
END Movs;
PROCEDURE Cmps (op: INTEGER);
BEGIN
IF op = 0A6H THEN WriteOp("cmpsb")
ELSIF (op = 0A7H) & opPrefix THEN WriteOp("cmpsb")
ELSIF op = 0A7H THEN WriteOp("cmpsw")
ELSE Error
END
END Cmps;
PROCEDURE Stos (op: INTEGER);
BEGIN
IF op = 0AAH THEN WriteOp("stosb")
ELSIF (op = 0ABH) & opPrefix THEN WriteOp("stosw")
ELSIF op = 0ABH THEN WriteOp("stosd")
ELSE Error
END
END Stos;
PROCEDURE Lods (op: INTEGER);
BEGIN
IF op = 0ACH THEN WriteOp("lodsb")
ELSIF (op = 0ADH) & opPrefix THEN WriteOp("lodsw")
ELSIF op = 0ADH THEN WriteOp("lodsd")
ELSE Error
END
END Lods;
PROCEDURE Scas (op: INTEGER);
BEGIN
IF op = 0AEH THEN WriteOp("scasb")
ELSIF (op = 0AFH) & opPrefix THEN WriteOp("scasw")
ELSIF op = 0AFH THEN WriteOp("scasd")
ELSE Error
END
END Scas;
PROCEDURE Ret (op: INTEGER);
VAR imm: INTEGER;
BEGIN
IF (op = 0C2H) OR (op = 0CAH) THEN
GetWord(imm); WriteWord(imm)
END ;
IF (op = 0CAH) OR (op = 0CBH) THEN WriteOp("ret far")
ELSE WriteOp("ret")
END ;
IF (op = 0C2H) OR (op = 0CAH) THEN WriteDisp(imm) END
END Ret;
PROCEDURE Enter (op: INTEGER);
VAR l, b: INTEGER;
BEGIN
GetWord(l); WriteWord(l); Write(" ");
GetByte(b); WriteByte(b); Write(" ");
WriteOp("enter");
WriteDisp(l); WriteComma; WriteDisp(b)
END Enter;
PROCEDURE Les (op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN
ModRm(mode, reg, base, inx, scale, disp);
WriteOp("les");
WriteRM(mode, 1, reg, base, inx, scale, disp, 0, FALSE)
END Les;
PROCEDURE Lds (op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN
ModRm(mode, reg, base, inx, scale, disp);
WriteOp("lds");
WriteRM(mode, 1, reg, base, inx, scale, disp, 0, FALSE)
END Lds;
PROCEDURE Ldseg (op: INTEGER);
VAR reg, base, inx, scale, mode, disp: INTEGER;
BEGIN
ModRm(mode, reg, base, inx, scale, disp);
IF op = 0B2H THEN WriteOp("lss")
ELSIF op = 0B4H THEN WriteOp("lfs")
ELSE WriteOp("lgs")
END ;
WriteRM(mode, 1, reg, base, inx, scale, disp, 0, FALSE)
END Ldseg;
PROCEDURE Int (op: INTEGER);
VAR imm: INTEGER;
BEGIN
IF op = 0CDH THEN
GetByte(imm); WriteByte(imm)
ELSE imm := 3
END ;
WriteOp("int");
WriteDisp(imm)
END Int;
PROCEDURE Loop (op: INTEGER);
VAR imm: INTEGER;
BEGIN
GetImm(0, imm);
IF op = 0E0H THEN WriteOp("loopne")
ELSIF op = 0E1H THEN WriteOp("loope")
ELSIF op = 0E2H THEN WriteOp("loop")
ELSIF op = 0E3H THEN WriteOp("jcxz")
ELSE Error
END ;
WriteDisp(imm)
END Loop;
PROCEDURE InOut (op: INTEGER);