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DAsmUtil.pas
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unit DasmUtil;
(*
The main i80x86 disassembler module of the DCU32INT utility by Alexei Hmelnov.
----------------------------------------------------------------------------
E-Mail: [email protected]
http://hmelnov.icc.ru/DCU/
----------------------------------------------------------------------------
See the file "readme.txt" for more details.
------------------------------------------------------------------------
IMPORTANT NOTE:
This software is provided 'as-is', without any expressed or implied warranty.
In no event will the author be held liable for any damages arising from the
use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented, you must not
claim that you wrote the original software.
2. Altered source versions must be plainly marked as such, and must not
be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*)
interface
uses
DasmDefs, FixUp, {$IFNDEF XMLx86}DasmOpT{$ELSE}x86Reg, x86Dasm{$ENDIF};
function Identic(I: integer): integer;
function ReadByte(var B: integer): boolean;
function SeeNextCodeByte: integer { -1 => Error };
procedure SkipByte; // Call after SeeNextCodeByte only - no checks inside
function UnReadByte: boolean;
{$IFNDEF XMLx86}
procedure SetPrefix(V: integer);
procedure SetSuffix(V: integer);
procedure SetOpName(V: integer);
procedure SetOpPrefix(V: integer);
procedure setEAMod3Tbl(const Tbl: array of TRegIndex);
{$ELSE}
procedure setEAMod3Tbl(Tbl: TRegTblIndex);
{$ENDIF}
procedure SetCmdArg(V: integer);
procedure SetSeg(V: integer);
function GetSeg: integer;
function imPtr: boolean;
// function im(DS: integer): boolean;
function ImmedBW(DS: integer): boolean;
// function imSExt(DS: integer): boolean;
function imInt(DS: integer): boolean;
function jmpOfs(DS: integer): boolean;
function getEA(W: integer; var M, A: integer): boolean;
function getImmOfsEA(W: integer; var A: integer): boolean;
procedure setEASize(DS: integer);
procedure setOS;
procedure setAS;
function GetAS: integer;
function GetOS: integer;
function GetMode: integer;
// 64-bit support
{$IFDEF I64}
// function mode64: integer; replaced by absolute var
procedure setREX(W, V: integer);
function GetOS64: integer;
function wasREX: integer;
function wasRexW: integer;
function addREXBit(V, hPlace: integer): integer;
{$ENDIF}
function ReportImmed(IsInt, SignRq: boolean; DSF, hDSize, SegN, Ofs: Byte;
Fix: PFixupRec): LongInt;
type
PBMTblProc = ^TBMTblProc;
TBMTblProc = array [Byte] of THBMName;
const
{ Command arguments }
caReg = 1;
caEffAdr = 2;
caImmed = 3;
caVal = 4;
caJmpOfs = 5;
caInt = 6;
caMask = $F;
const
dsByte = 1;
dsWord = 2;
dsDbl = 3;
dsQWord = 4;
dsTWord = 5;
dsPtr = 6;
dsPtr6b = 7;
dsMax = 7;
dsMask = $7;
dsIPOfs = 8; // for TEffAddr.dOfs only
dsRIPOfs = 9; // for TEffAddr.dOfs only
dsToSize: array [0 .. 9] of Cardinal = (0, 1, 2, 4, 8, 10, 4, 6, 4, 4);
const
hAX = 0;
hCX = 1;
hDX = 2;
hBX = 3;
hSP = 4;
hBP = 5;
hSI = 6;
hDI = 7;
hPresent = $80;
regcSzB = $00;
regcSzW = $20;
regcSzD = $40;
regcSzQ = $60;
hPresent2b = hPresent + regcSzW;
hWReg = $10;
hRegHasRex = $10;
hRegSizeShift = 5;
hRegSizeMask = $3;
dOfsSizeShift = 4 { 5 (4 is enough because all the commands must fit in 15 bytes) };
dOfsOfsMask = (1 shl dOfsSizeShift) - 1;
const
hBXF = hBX + hPresent2b;
hBPF = hBP + hPresent2b;
hSIF = (hSI + hPresent2b) { shl 4 };
hDIF = (hDI + hPresent2b) { shl 4 };
const
RMSL: array [0 .. 7] of Byte = (
hBXF,
hBXF,
hBPF,
hBPF,
0,
0,
hBPF,
hBXF
);
RMSR: array [0 .. 7] of Byte = (
hSIF,
hDIF,
hSIF,
hDIF,
hSIF,
hDIF,
0,
0
);
const
hES = 0;
hCS = 1;
hSS = 2;
hDS = 3;
hFS = 4;
hGS = 5;
hNoSeg = 7;
hDefSeg = 8;
DefEASeg: array [0 .. 7] of Byte = (
hDS, hDS, hSS, hSS, hDS, hDS, hDS, hDS);
DefRegSeg: array [0 .. 7] of Byte = (
hDS, hDS, hDS, hDS, hSS, hSS, hDS, hDS);
type
// TRegNum=0..7;
TRegCode = Byte;
PEffAddr = ^TEffAddr;
TEffAddr = object
// protected required for other modules, which extend DasmUtils
hSeg: Byte;
DataSize: Byte; // dsXXX
// hBase:Byte;{Index4,Base4}
hBaseOnly: TRegCode; { Base4,HasRex1,dSize2,hPresent1 }
hIndex: TRegCode; { Index4,HasRex1,dSize2,hPresent1 }
dOfs: Byte; { OfsSize3,Ofs5 }
SS: Byte;
Fix: PFixupRec;
// public
end;
TCmArg = record
CmdKind: Byte;
DSize: Byte;
{$IFDEF XMLx86}
nArg: Byte; // In the list of TOpcodeArg`s
{$ENDIF}
Inf: integer { Byte };
Fix: PFixupRec;
end;
PCmdInfo = ^TCmdInfo;
TCmdInfo = record
PrefSize: Byte;
hCmd: TCmdIndex;
EA: TEffAddr;
Cnt: Byte;
Arg: array [1 .. 3] of TCmArg;
end;
var
OpSeg: Byte;
Cmd: TCmdInfo;
{$IFNDEF XMLx86}
CmdPrefix, CmdSuffix: integer;
PrefixCnt: integer;
PrefixTbl: array [0 .. 10] of integer;
{$ENDIF}
var
AdrIs32Deft: boolean = true;
OpIs32Deft: boolean = true;
// {$IFDEF XMLx86}
ShowX86DasmExtraInfo: boolean = false;
// {$ENDIF}
{$IFDEF I64}
const
WordSize: array [0 .. 2] of Byte = (2, 4, 8);
rexfW = $8;
rexfPresent = $10;
var
modeI64: boolean = false;
mode64: Byte absolute modeI64;
var
CurREX: Byte;
{$ELSE}
const
WordSize: array [0 .. 1] of Byte = (2, 4);
{$ENDIF}
// procedure ClearCommand;
function ReadCommand: boolean;
procedure ShowCommand;
{$IFNDEF XMLx86}
var
{$IFDEF I64}
RegTbl: array [boolean { with REX } ] of array [0 .. 3] of PBMTblProc;
{$ELSE}
RegTbl: array [0 .. 2] of PBMTblProc;
{$ENDIF}
SegRegTbl: PBMTblProc;
{$ELSE}
const
RegTbl: array [boolean { with REX } ] of array [0 .. 3] of TRegTblIndex = ((rtRB, rtRW, rtRD, rtRQ), (rtRB64, rtRW, rtRD, rtRQ));
{$ENDIF}
function GetIntData(hDSize, Ofs: Byte; var I: LongInt): boolean;
implementation
uses
{$IFDEF UNICODE}AnsiStrings{$ELSE}SysUtils{$ENDIF},
{$IFNDEF XMLx86}op{$ELSE}x86Defs, x86Op, TypInfo{$ENDIF}, {DCU_In,} DCU_Out;
var
AdrIs32: boolean;
OpIs32: boolean;
{$IFNDEF XMLx86}
EAMod3TblProc: PBMTblProc;
EAMod3TblProcCnt: integer;
{$ELSE}
EAMod3TblProc: TRegTblIndex;
{$ENDIF}
var { For unread }
fxState0: TFixupState;
procedure ClearCommand;
begin
PrevCodePtr := CodePtr;
fillChar(Cmd, SizeOf(Cmd), 0);
OpSeg := hDefSeg;
{$IFNDEF XMLx86}
CmdPrefix := 0;
CmdSuffix := 0;
PrefixCnt := 0;
{$ENDIF}
AdrIs32 := AdrIs32Deft;
OpIs32 := OpIs32Deft;
{$IFNDEF XMLx86}
EAMod3TblProc := Nil;
EAMod3TblProcCnt := 0;
{$ELSE}
EAMod3TblProc := rtNone;
{$ENDIF}
{$IFDEF I64}
CurREX := 0;
{$ENDIF}
SaveFixupState(fxState0);
end;
(*
function ReadCodeByte(var B: Byte): boolean;
{ This procedure can use fixup information to prevent parsing commands }
{ which contradict fixups }
var
Fx: PFixupRec;
F: Byte;
begin
Result := false;
if CodePtr>=CodeEnd then
Exit {Memory block finished};
SkipFixups(CodePtr-CodeStart);
if CodePtr<FixUpEnd then
Exit {Code can't be inside FixUp};
repeat
Fx := CurFixup(CodePtr-CodeStart);
if Fx=Nil then
Break;
F := TByte4(Fx^.OfsF)[3];
if F<fxStart then begin
SetFixEnd;
Exit {Code can't be inside FixUp};
end ;
if F=fxStart then begin
if CodePtr>PrevCodePtr then
Exit {Can't be inside a command};
end
else {if F=fxEnd then}
Exit {Can't be inside a code};
until not NextFixup(CodePtr-CodeStart);
B := Byte(CodePtr^);
Inc(CodePtr);
Result := true;
end ;
*)
function ReadCodeByte(var B: Byte): boolean;
{ This procedure can use fixup information to prevent parsing commands }
{ which contradict fixups }
begin
Result := ChkNoFixupIn(CodePtr, 1);
if not Result then
Exit;
B := Byte(CodePtr^);
Inc(CodePtr);
Result := true;
end;
function SeeNextCodeByte: integer { -1 => Error };
{ This procedure can use fixup information to prevent parsing commands }
{ which contradict fixups }
begin
if not ChkNoFixupIn(CodePtr, 1) then begin
Result := -1;
Exit;
end;
Result := Byte(CodePtr^);
end;
procedure SkipByte;
begin
Inc(CodePtr);
end;
function ReadImmedData(Size: Cardinal; var Res: Byte; var Fix: PFixupRec): boolean;
begin
Result := GetFixupFor(CodePtr, Size, false, Fix);
if not Result then
Exit;
Res := CodePtr - PrevCodePtr;
Inc(CodePtr, Size);
end;
function Identic(I: integer): integer;
begin
Result := I;
end;
function ReadByte(var B: integer): boolean;
var
B0: Byte;
begin
Result := ReadCodeByte(B0);
B := B0;
end;
function UnReadByte: boolean;
begin
Result := false;
if CodePtr <= PrevCodePtr then
Exit;
Dec(CodePtr);
{ May be it's not necessary here, but it will be safer to playback fixups: }
RestoreFixupState(fxState0);
SkipFixups(CodePtr - CodeStart);
Result := true;
end;
{$IFNDEF XMLx86}
procedure SetPrefix(V: integer);
begin
CmdPrefix := V;
end;
procedure SetSuffix(V: integer);
begin
CmdSuffix := V;
end;
procedure SetOpName(V: integer);
begin
Cmd.hCmd := V;
end;
procedure SetOpPrefix(V: integer);
begin
PrefixTbl[PrefixCnt] := V;
Inc(PrefixCnt);
end;
procedure setEAMod3Tbl(const Tbl: array of TRegIndex);
begin
EAMod3TblProc := @Tbl;
EAMod3TblProcCnt := High(Tbl) + 1;
end;
{$ELSE XMLx86}
procedure setEAMod3Tbl(Tbl: TRegTblIndex);
begin
EAMod3TblProc := Tbl;
end;
{$ENDIF}
procedure SetCmdArg(V: integer);
begin
// Result := false;
if Cmd.Cnt >= 3 then
Exit;
Inc(Cmd.Cnt);
with Cmd.Arg[Cmd.Cnt] do begin
DSize := 0;
if V = hEA then
CmdKind := caEffAdr
else
if (V and {$IFNDEF XMLx86}nf{$ELSE}nbMask{$ENDIF}) <> 0 then begin
CmdKind := caReg;
Inf := V and nm;
end
else { if (V and $FFFFFF00)=0 then } begin
CmdKind := caVal;
Inf := V;
end
{ else
Exit };
end;
end;
procedure SetSeg(V: integer);
begin
OpSeg := V;
end;
function GetSeg: integer;
begin
Result := OpSeg;
end;
function im(DSize: integer): boolean;
{ const
SizeTbl: array[1..6] of Cardinal = (
SizeOf(Byte),
SizeOf(Word),
SizeOf(LongInt),
8,
10,
SizeOf(Pointer)
);
PtrSize: array[boolean] of integer = (4,6); }
var
DSz, Size: Cardinal;
imOfs: Byte;
begin
Result := false;
if Cmd.Cnt >= 3 then
Exit;
DSz := DSize;
if (DSz = dsPtr) and OpIs32 then
DSz := dsPtr6b;
Size := dsToSize[DSz];
Inc(Cmd.Cnt);
{ if DSize=dsPtr then
Size := PtrSize[OpIs32]
else
Size := SizeTbl[DSize]; }
with Cmd.Arg[Cmd.Cnt] do begin
CmdKind := caImmed;
DSize := DSz;
if not ReadImmedData(Size, imOfs, Fix) then
Exit;
Inf := imOfs;
end;
Result := true;
end;
function imPtr: boolean;
begin
Result := im(dsPtr);
end;
function ImmedBW(DS: integer): boolean;
const
BWTbl: array [0 .. 3] of Byte = (dsByte, dsWord, dsDbl, dsQWord);
begin
Result := im(BWTbl[DS and 3]);
end;
(*
function imSExt(S,W: integer): boolean;
const
BWTbl: array[0..1] of Byte = (dsByte,dsWord);
var
SExt: Byte;
begin
Result := false;
SExt := S and $1;
if not im(BWTbl[(W and 1)and not (SExt){Ïðè SExt - èñïîëüçóåòñÿ íåïîñð. áàéò}])
then
Exit;
if SExt<>0 then
with Cmd.Arg[Cmd.Cnt] do
Kind := Kind and not caMask or caInt;
Result := true;
end ;
*)
function imInt(DS: integer): boolean;
begin
Result := ImmedBW(DS);
if Result then
with Cmd.Arg[Cmd.Cnt] do begin
CmdKind := caInt; // DSize is not changed //+(Kind and not caMask);
end;
end;
function jmpOfs(DS: integer): boolean;
begin
Result := ImmedBW(DS);
if Result then
with Cmd.Arg[Cmd.Cnt] do
CmdKind := caJmpOfs; // DSize is not changed //+(Kind and not caMask);
end;
function getEA(W: integer; var M, A: integer): boolean;
var
CurB, Up2, Lo3, SIB: Byte;
OpSize: Byte;
imOfs: Byte;
{$IFNDEF XMLx86}
TblProc: PBMTblProc;
{$ELSE}
RegCnt: integer;
TblProc: TRegTblIndex;
{$ENDIF}
{$IFDEF I64}
var
SzF, OfsSzF: Byte;
{$ELSE}
const
SzF = regcSzD;
OfsSzF = dsDbl;
{$ENDIF}
begin
Result := false;
{ if W>dsMax then
W := dsMax;
OpSize := W; }
OpSize := (W and 3);
// Prevents from describing MMX commands
// if (OpSize>=3){$IFDEF I64}and not modeI64{$ENDIF} then
// Exit;
if not ReadCodeByte(CurB) then
Exit;
Up2 := CurB shr 6;
Lo3 := CurB and $7;
M := (CurB shr 3) and $7;
if Up2 = 3 then begin
{$IFDEF I64}
if CurREX > 0 then
Lo3 := Lo3 or (CurREX and $1) shl 3;
{$ENDIF}
{$IFNDEF XMLx86}
if EAMod3TblProc <> Nil then begin
TblProc := EAMod3TblProc;
if Lo3 >= EAMod3TblProcCnt then
Lo3 := Lo3 mod EAMod3TblProcCnt; // Just in case
end
else
TblProc := RegTbl{$IFDEF I64}[CurREX > 0]{$ENDIF}[OpSize];
A := TblProc^[Lo3]
{$ELSE}
if EAMod3TblProc <> rtNone then
TblProc := EAMod3TblProc
else
TblProc := RegTbl[CurREX > 0][OpSize];
RegCnt := RegTblInfo[TblProc].Cnt;
if Lo3 >= RegCnt then
Lo3 := Lo3 mod RegCnt; // Just in case
A := EncodeRegIndex(TblProc, Lo3);
{$ENDIF}
end
else begin
A := hEA;
if {$IFDEF I64}modeI64 or {$ENDIF} AdrIs32 then begin
{$IFDEF I64}
SzF := regcSzD;
if modeI64 and AdrIs32 { In fact means 64 bit } then
SzF := regcSzQ;
{$ENDIF}
if Lo3 = hSP then begin { SIB }
if not ReadCodeByte(SIB) then
Exit;
Cmd.EA.SS := SIB shr 6;
Lo3 := SIB and 7;
if (Lo3 = hBP) and (Up2 = 0) then begin
Up2 := 2;
Lo3 := 0;
{ Base=EBP & mod=0 => Base=None & disp32 }
end
else
Inc(Lo3, hPresent);
SIB := (SIB shr 3) and 7 { Index };
if SIB <> hSP then
SIB := SIB + hPresent
else
SIB := 0;
{$IFDEF I64}
if CurREX > 0 then begin
if Lo3 and hPresent <> 0 then
Lo3 := Lo3 or hRegHasRex or (CurREX and $1) shl 3;
if SIB and hPresent <> 0 then
SIB := SIB or hRegHasRex or (CurREX and $2) shl 2;
end;
{$ENDIF}
{ Cmd.EA.hBaseOnly := Lo3+SIB shl 4; }
Cmd.EA.hBaseOnly := Lo3 or SzF;
Cmd.EA.hIndex := SIB or SzF;
end
else { No SIB } begin
if (Up2 = 0) and (Lo3 = hBP) then begin
Cmd.EA.hBaseOnly := 0;
Cmd.EA.hIndex := 0;
if not ReadImmedData(SizeOf(LongInt), imOfs, Cmd.EA.Fix) then
Exit;
{$IFDEF I64}
if modeI64 then { RIP based }
OfsSzF := dsIPOfs + Ord(AdrIs32)
else
OfsSzF := dsDbl;
{$ENDIF}
Cmd.EA.dOfs := OfsSzF shl dOfsSizeShift or imOfs;
Lo3 := 0; { For OpSeg }
end
else begin
{$IFDEF I64}
if CurREX > 0 then
Lo3 := Lo3 or hRegHasRex or (CurREX and $1) shl 3;
{$ENDIF}
Cmd.EA.hBaseOnly := Lo3 or hPresent or SzF;
Cmd.EA.hIndex := 0;
end;
end;
if OpSeg = hDefSeg then
OpSeg := hDefSeg or DefRegSeg[Lo3 and 7];
end
else { not AdrIs32 } begin
if (Up2 = 0) and (Lo3 = 6) then begin
Cmd.EA.hBaseOnly := 0;
Cmd.EA.hIndex := 0;
if not ReadImmedData(SizeOf(Word), imOfs, Cmd.EA.Fix) then
Exit;
Cmd.EA.dOfs := dsWord shl dOfsSizeShift or imOfs;
Lo3 := 0; { For OpSeg }
end
else begin
Cmd.EA.hBaseOnly := RMSL[Lo3];
Cmd.EA.hIndex := RMSR[Lo3];
end;
if OpSeg = hDefSeg then
OpSeg := hDefSeg or DefEASeg[Lo3 and 7];
end;
Case Up2 of
1: begin
if not ReadImmedData(SizeOf(Byte), imOfs, Cmd.EA.Fix) then
Exit;
Cmd.EA.dOfs := dsByte shl dOfsSizeShift or imOfs;
end;
2: begin
if not ReadImmedData(WordSize[Ord({$IFDEF I64}modeI64 or {$ENDIF}AdrIs32)], imOfs, Cmd.EA.Fix) then
Exit;
Cmd.EA.dOfs := (dsWord + Ord({$IFDEF I64}modeI64 or {$ENDIF}AdrIs32)) { dsWord } shl dOfsSizeShift or imOfs;
end;
End;
{ GetMemStr := GetSegStr+'['+MS+']' ; }
Cmd.EA.hSeg := OpSeg;
Cmd.EA.DataSize := W + 1;
end;
Result := CodePtr <= CodeEnd;
end;
function getImmOfsEA(W: integer; var A: integer): boolean;
var
OpSize: Byte;
imOfs: Byte;
begin
Result := false;
OpSize := W and $1;
if OpSize > 0 then
OpSize := 1 + Ord(OpIs32);
A := hEA;
if not ReadImmedData(WordSize[Ord(AdrIs32)], imOfs, Cmd.EA.Fix) then
Exit;
Cmd.EA.dOfs := (dsWord + Ord(AdrIs32)) { dsWord } shl dOfsSizeShift or imOfs;
if OpSeg = hDefSeg then
OpSeg := hDefSeg or hDS;
Cmd.EA.hSeg := OpSeg;
Cmd.EA.DataSize := OpSize + 1;
Result := CodePtr <= CodeEnd;
end;
procedure setEASize(DS: integer);
var
S: Byte;
begin
S := DS;
if S >= dsMax then
Exit;
Cmd.EA.DataSize := S;
end;
procedure setOS;
begin
OpIs32 := not OpIs32Deft;
end;
procedure setAS;
begin
AdrIs32 := not AdrIs32Deft;
end;
function GetAS: integer;
begin
Result := Ord(AdrIs32);
end;
function GetOS: integer;
begin
Result := Ord(OpIs32);
end;
function GetMode: integer;
begin
Result := Ord(AdrIs32Deft){$IFDEF I64} * (1 + Ord(modeI64)){$ENDIF};
end;
// 64-bit support
{$IFDEF I64}
procedure setREX(W, V: integer);
begin
CurREX := V and $7 + (W and $1) * rexfW + rexfPresent;
end;
function GetOS64: integer;
begin
if CurREX and rexfW <> 0 then
Result := 2 // 64-bit
else
Result := Ord(OpIs32);
end;
function wasREX: integer;
begin
Result := Ord(CurREX <> 0);
end;
function wasRexW: integer;
begin
Result := Ord(CurREX and rexfW <> 0);
end;
function addREXBit(V, hPlace: integer): integer;
begin
V := V and $7; // Paranoic
hPlace := hPlace and $3; // Paranoic
if (CurREX <> 0 { was REX } ) and (hPlace > 0 { 0 means Independent of REX } ) and (CurREX and (1 shl (hPlace - 1)) <> 0 { The bit is 1 } ) then
V := V or $8;
Result := V;
end;
{$ENDIF}
function ReadCommand: boolean;
begin
ClearCommand;
Result := ReadOp;
end;
{$IFNDEF XMLx86}
procedure WriteBMOpName(hN: THBMName);
begin
PutKW(GetOpName(hN));
end;
{$ENDIF}
procedure WriteInt(I: integer);
begin
PutSFmt('%d', [I]);
end;
procedure WriteRegVarInfo(hReg: TRegIndex; Ofs, Size: integer; IsFirst: boolean);
var
S: AnsiString;
hDecl: integer;
ProcOfs: integer;
begin
if not Assigned(GetRegVarInfo) then
Exit;
if IsFirst then { i.e. It may be an assignment target }
ProcOfs := CodePtr - CodeBase
else
ProcOfs := PrevCodePtr - CodeBase;
S := GetRegVarInfo(ProcOfs, hReg, Ofs, Size, hDecl);
if S <> '' then begin
PutCh('{');
PutAddrDefStr(S, hDecl);
PutCh('}');
end;
end;
procedure WriteRegName(hN: TRegIndex);
begin
PutKW(GetRegName(hN));
end;
procedure WriteRegNameInf(hN: TRegIndex; IsFirst: boolean);
begin
WriteRegName(hN);
WriteRegVarInfo(hN, 0 { Ofs } , 0 { Size: auto } , IsFirst);
end;
function WriteImmed(hDSize, Ofs: Byte; MayBeAddr: boolean; Fix: PFixupRec): LongInt;
var
DP, DP1: Pointer;
DS: Byte;
{ IsAddr: boolean;
A: Pointer; }
Fixed: boolean;
begin
Result := 0;
DP := PrevCodePtr + Ofs;
DS := hDSize and dsMask;
Case DS of
dsByte: Result := Byte(DP^);
dsWord: Result := Word(DP^);
dsDbl: Result := LongInt(DP^);
End;
Fixed := ReportFixUp(Fix, Result, ShowHeuristicRefs);
{
// if (ReportFixUp(Cardinal(DP)-Cardinal(CodeStart),hDSize and dsMask,DP)=0)
// then begin
IsAddr := MayBeAddr and((Ord(AdrIs32Deft)+dsWord)=hDSize);
if IsAddr then begin
if hDSize=dsWord then
LongInt(A) := Word(DP^)
else
LongInt(A) := LongInt(DP^);
// StartStrInfo(siDataAddr,A);
end ;
}
if Fixed then begin
if (DS = dsDbl) { and(Result=0) } then
Exit;
PutS('{+');
end;
Case DS of
dsByte: PutSFmt('$%2.2x', [Result]);
dsWord: PutSFmt('$%4.4x', [Result]);
dsDbl: PutSFmt('$%8.8x', [Result]);
dsPtr: begin
Result := LongInt(DP^);
PutSFmt('$%8.8x', [Result])
end;
dsPtr6b: begin
DP1 := DP;
Inc(TIncPtr(DP1), 4);
PutSFmt('$%4.4x:$%8.8x', [Word(DP1^), LongInt(DP^)]);
end;
{ dsPtr:
if not OpIs32 then begin
Result := LongInt(DP^);
PutSFmt('$%8.8x',[Result])
end
else begin
DP1 := DP;
Inc(integer(DP1),4);
PutSFmt('$%4.4x:$%8.8x',[Word(DP1^),LongInt(DP^)]);
end ; }
dsQWord: PutS(CharDumpStr(DP^, 8));
dsTWord: PutS(CharDumpStr(DP^, 10));
else
PutS('?Immed');
End;
if Fixed then
PutS('}');
// if IsAddr then
// EndStrInfo;
// end ;
end;
function WriteIntData(SignRq, FixSignRq, IsJmpOfs: boolean; hDSize, Ofs: Byte; Fix: PFixupRec): LongInt;
var
DP: Pointer;
DS: Byte;
Fixed: boolean;
begin
DP := PrevCodePtr + Ofs;
DS := hDSize and dsMask;
Case DS of
dsByte: Result := ShortInt(DP^);
dsWord: Result := SmallInt(DP^);
dsDbl: begin
Result := LongInt(DP^);
if IsJmpOfs then // The referenced address is computed from the command end (CodePtr)
Inc(Result, (CodePtr - TIncPtr(DP)) - SizeOf(LongInt)); // required for IP-relative addressing in 64-bit mode
end;
else
PutS('?Int');
Result := 0;
Exit;
End;
if SignRq and ((Result > 0) or FixSignRq and FixupOk(Fix)) then
PutS('+');
// if (ReportFixUp(Cardinal(DP)-Cardinal(CodeStart),hDSize and dsMask,DP)=0{<>0})
// then
Fixed := ReportFixUp(Fix, Result, ShowHeuristicRefs);
if Fixed then begin
if (DS = dsDbl) { and(Result=0) } then
Exit;
end;
if SignRq and (Result = 0) then
Exit;
if Fixed then
PutS('{+');
WriteInt(Result);
if Fixed then
PutS('}');
end;
procedure WriteJmpOfs(hDSize, Ofs: Byte; Fix: PFixupRec);
var
dOfs: LongInt;
begin
dOfs := WriteIntData(true, false, true { IsJmpOfs } , hDSize, Ofs, Fix);
if Fix = Nil then begin
PutS(' (');
PutMemRefStr(Format('0x%x', [(CodePtr - CodeBase) + dOfs]), CodePtr - CodeMemBase + dOfs);
PutS(')');
end;
end;
function ReportImmed(IsInt, SignRq: boolean; DSF, hDSize, SegN, Ofs: Byte;
Fix: PFixupRec): LongInt;
{ var
RepRes: Byte; }
begin