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2232 lines
76 KiB
ObjectPascal
2232 lines
76 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Carl Eric Codere and Peter Vreman
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Does the parsing process for the intel styled inline assembler.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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Unit Rax86int;
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{$i fpcdefs.inc}
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interface
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uses
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cclasses,
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cpubase,
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globtype,
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aasmbase,
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rasm,
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rax86;
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type
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tasmtoken = (
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AS_NONE,AS_LABEL,AS_LLABEL,AS_STRING,AS_INTNUM,
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AS_COMMA,AS_LBRACKET,AS_RBRACKET,AS_LPAREN,
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AS_RPAREN,AS_COLON,AS_DOT,AS_PLUS,AS_MINUS,AS_STAR,
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AS_SEPARATOR,AS_ID,AS_REGISTER,AS_OPCODE,AS_SLASH,
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{------------------ Assembler directives --------------------}
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AS_ALIGN,AS_DB,AS_DW,AS_DD,AS_DQ,AS_END,
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{------------------ Assembler Operators --------------------}
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AS_BYTE,AS_WORD,AS_DWORD,AS_QWORD,AS_TBYTE,AS_DQWORD,AS_NEAR,AS_FAR,
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AS_HIGH,AS_LOW,AS_OFFSET,AS_SIZEOF,AS_VMTOFFSET,AS_SEG,AS_TYPE,AS_PTR,AS_MOD,AS_SHL,AS_SHR,AS_NOT,
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AS_AND,AS_OR,AS_XOR);
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type
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tx86intreader = class(tasmreader)
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actasmtoken : tasmtoken;
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prevasmtoken : tasmtoken;
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ActOpsize : topsize;
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constructor create;override;
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function is_asmopcode(const s: string):boolean;
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function is_asmoperator(const s: string):boolean;
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function is_asmdirective(const s: string):boolean;
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function is_register(const s:string):boolean;
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function is_locallabel(const s:string):boolean;
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function Assemble: tlinkedlist;override;
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procedure GetToken;
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function consume(t : tasmtoken):boolean;
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procedure RecoverConsume(allowcomma:boolean);
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procedure BuildRecordOffsetSize(const expr: string;var offset:aint;var size:aint; var mangledname: string; needvmtofs: boolean);
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procedure BuildConstSymbolExpression(needofs,isref,startingminus:boolean;var value:aint;var asmsym:string;var asmsymtyp:TAsmsymtype);
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function BuildConstExpression:aint;
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function BuildRefConstExpression:aint;
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procedure BuildReference(oper : tx86operand);
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procedure BuildOperand(oper: tx86operand;istypecast:boolean);
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procedure BuildConstantOperand(oper: tx86operand);
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procedure BuildOpCode(instr : tx86instruction);
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procedure BuildConstant(constsize: byte);
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end;
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implementation
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uses
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{ common }
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cutils,
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{ global }
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globals,verbose,
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systems,
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{ aasm }
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aasmtai,aasmdata,aasmcpu,
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{ symtable }
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symconst,symbase,symtype,symsym,symdef,symtable,
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{ parser }
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scanner,
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{ register allocator }
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rabase,rautils,itx86int,
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{ codegen }
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cgbase,cgobj,procinfo
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;
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type
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tasmkeyword = string[9];
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const
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{ These tokens should be modified accordingly to the modifications }
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{ in the different enumerations. }
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firstdirective = AS_ALIGN;
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lastdirective = AS_END;
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firstoperator = AS_BYTE;
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lastoperator = AS_XOR;
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_count_asmdirectives = longint(lastdirective)-longint(firstdirective);
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_count_asmoperators = longint(lastoperator)-longint(firstoperator);
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_asmdirectives : array[0.._count_asmdirectives] of tasmkeyword =
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('ALIGN','DB','DW','DD','DQ','END');
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{ problems with shl,shr,not,and,or and xor, they are }
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{ context sensitive. }
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_asmoperators : array[0.._count_asmoperators] of tasmkeyword = (
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'BYTE','WORD','DWORD','QWORD','TBYTE','DQWORD','NEAR','FAR','HIGH',
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'LOW','OFFSET','SIZEOF','VMTOFFSET','SEG','TYPE','PTR','MOD','SHL','SHR','NOT','AND',
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'OR','XOR');
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token2str : array[tasmtoken] of string[10] = (
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'','Label','LLabel','String','Integer',
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',','[',']','(',
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')',':','.','+','-','*',
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';','identifier','register','opcode','/',
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'','','','','','END',
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'','','','','','','','','',
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'','','sizeof','vmtoffset','','type','ptr','mod','shl','shr','not',
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'and','or','xor'
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);
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var
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inexpression : boolean;
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constructor tx86intreader.create;
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var
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i : tasmop;
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Begin
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inherited create;
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iasmops:=TFPHashList.create;
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for i:=firstop to lastop do
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iasmops.Add(upper(std_op2str[i]),Pointer(PtrInt(i)));
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end;
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{---------------------------------------------------------------------}
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{ Routines for the tokenizing }
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{---------------------------------------------------------------------}
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function tx86intreader.is_asmopcode(const s: string):boolean;
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var
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cond : string[4];
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cnd : tasmcond;
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j: longint;
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Begin
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is_asmopcode:=FALSE;
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actopcode:=A_None;
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actcondition:=C_None;
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actopsize:=S_NO;
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{ Search opcodes }
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actopcode:=tasmop(PtrUInt(iasmops.Find(s)));
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if actopcode<>A_NONE then
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begin
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actasmtoken:=AS_OPCODE;
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result:=TRUE;
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exit;
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end;
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{ not found yet, check condition opcodes }
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j:=0;
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while (j<CondAsmOps) do
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begin
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if Copy(s,1,Length(CondAsmOpStr[j]))=CondAsmOpStr[j] then
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begin
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cond:=Copy(s,Length(CondAsmOpStr[j])+1,255);
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if cond<>'' then
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begin
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for cnd:=low(TasmCond) to high(TasmCond) do
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if Cond=Upper(cond2str[cnd]) then
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begin
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actopcode:=CondASmOp[j];
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actcondition:=cnd;
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is_asmopcode:=TRUE;
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actasmtoken:=AS_OPCODE;
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exit
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end;
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end;
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end;
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inc(j);
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end;
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end;
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function tx86intreader.is_asmoperator(const s: string):boolean;
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var
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i : longint;
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Begin
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for i:=0 to _count_asmoperators do
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if s=_asmoperators[i] then
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begin
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actasmtoken:=tasmtoken(longint(firstoperator)+i);
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is_asmoperator:=true;
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exit;
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end;
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is_asmoperator:=false;
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end;
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Function tx86intreader.is_asmdirective(const s: string):boolean;
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var
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i : longint;
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Begin
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for i:=0 to _count_asmdirectives do
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if s=_asmdirectives[i] then
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begin
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actasmtoken:=tasmtoken(longint(firstdirective)+i);
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is_asmdirective:=true;
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exit;
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end;
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is_asmdirective:=false;
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end;
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function tx86intreader.is_register(const s:string):boolean;
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var
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entry: TSymEntry;
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begin
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is_register:=false;
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actasmregister:=masm_regnum_search(lower(s));
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if (actasmregister=NR_NO) and
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(current_procinfo.procdef.proccalloption=pocall_register) and
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(po_assembler in current_procinfo.procdef.procoptions) then
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begin
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entry:=current_procinfo.procdef.parast.Find(s);
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if assigned(entry) and
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(entry.typ=paravarsym) and
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assigned(tparavarsym(entry).paraloc[calleeside].Location) and
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(tparavarsym(entry).paraloc[calleeside].Location^.Loc=LOC_REGISTER) then
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actasmregister:=tparavarsym(entry).paraloc[calleeside].Location^.register;
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end;
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if actasmregister<>NR_NO then
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begin
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is_register:=true;
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actasmtoken:=AS_REGISTER;
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end;
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end;
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function tx86intreader.is_locallabel(const s:string):boolean;
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begin
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is_locallabel:=(length(s)>1) and (s[1]='@');
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end;
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Procedure tx86intreader.GetToken;
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var
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len : longint;
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forcelabel : boolean;
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srsym : tsym;
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srsymtable : TSymtable;
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begin
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{ save old token and reset new token }
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prevasmtoken:=actasmtoken;
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actasmtoken:=AS_NONE;
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{ reset }
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forcelabel:=FALSE;
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actasmpattern:='';
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{ while space and tab , continue scan... }
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while (c in [' ',#9]) do
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c:=current_scanner.asmgetchar;
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{ get token pos }
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if not (c in [#10,#13,'{',';']) then
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current_scanner.gettokenpos;
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{ Local Label, Label, Directive, Prefix or Opcode }
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if firsttoken and not (c in [#10,#13,'{',';']) then
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begin
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firsttoken:=FALSE;
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len:=0;
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while c in ['A'..'Z','a'..'z','0'..'9','_','@'] do
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begin
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{ if there is an at_sign, then this must absolutely be a label }
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if c = '@' then
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forcelabel:=TRUE;
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inc(len);
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actasmpattern[len]:=c;
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c:=current_scanner.asmgetchar;
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end;
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actasmpattern[0]:=chr(len);
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uppervar(actasmpattern);
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{ allow spaces }
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while (c in [' ',#9]) do
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c:=current_scanner.asmgetchar;
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{ label ? }
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if c = ':' then
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begin
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if actasmpattern[1]='@' then
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actasmtoken:=AS_LLABEL
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else
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actasmtoken:=AS_LABEL;
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{ let us point to the next character }
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c:=current_scanner.asmgetchar;
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firsttoken:=true;
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exit;
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end;
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{ Are we trying to create an identifier with }
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{ an at-sign...? }
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if forcelabel then
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Message(asmr_e_none_label_contain_at);
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{ opcode ? }
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If is_asmopcode(actasmpattern) then
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Begin
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{ check if we are in an expression }
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{ then continue with asm directives }
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if not inexpression then
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exit;
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end;
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if is_asmdirective(actasmpattern) then
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exit;
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message1(asmr_e_unknown_opcode,actasmpattern);
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actasmtoken:=AS_NONE;
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exit;
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end
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else { else firsttoken }
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begin
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case c of
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'@' : { possiblities : - local label reference , such as in jmp @local1 }
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{ - @Result, @Code or @Data special variables. }
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begin
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actasmpattern:=c;
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c:=current_scanner.asmgetchar;
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while c in ['A'..'Z','a'..'z','0'..'9','_','@'] do
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begin
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actasmpattern:=actasmpattern + c;
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c:=current_scanner.asmgetchar;
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end;
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uppervar(actasmpattern);
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actasmtoken:=AS_ID;
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exit;
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end;
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'A'..'Z','a'..'z','_': { identifier, register, opcode, prefix or directive }
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begin
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actasmpattern:=c;
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c:=current_scanner.asmgetchar;
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while c in ['A'..'Z','a'..'z','0'..'9','_'] do
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begin
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actasmpattern:=actasmpattern + c;
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c:=current_scanner.asmgetchar;
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end;
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uppervar(actasmpattern);
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{ after prefix we allow also a new opcode }
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If is_prefix(actopcode) and is_asmopcode(actasmpattern) then
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Begin
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{ if we are not in a constant }
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{ expression than this is an }
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{ opcode. }
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if not inexpression then
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exit;
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end;
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{ support st(X) for fpu registers }
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if (actasmpattern = 'ST') and (c='(') then
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Begin
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actasmpattern:=actasmpattern+c;
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c:=current_scanner.asmgetchar;
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{ allow spaces }
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while (c in [' ',#9]) do
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c:=current_scanner.asmgetchar;
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if c in ['0'..'7'] then
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actasmpattern:=actasmpattern + c
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else
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Message(asmr_e_invalid_fpu_register);
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c:=current_scanner.asmgetchar;
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{ allow spaces }
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while (c in [' ',#9]) do
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c:=current_scanner.asmgetchar;
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if c <> ')' then
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Message(asmr_e_invalid_fpu_register)
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else
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Begin
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actasmpattern:=actasmpattern + c;
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c:=current_scanner.asmgetchar;
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end;
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end;
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if is_asmdirective(actasmpattern) then
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exit;
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if is_asmoperator(actasmpattern) then
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exit;
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if is_register(actasmpattern) then
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exit;
|
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{ allow spaces }
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while (c in [' ',#9]) do
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c:=current_scanner.asmgetchar;
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{ if next is a '.' and this is a unitsym then we also need to
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parse the identifier }
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if (c='.') then
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begin
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asmsearchsym(actasmpattern,srsym,srsymtable);
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if assigned(srsym) and
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(srsym.typ=unitsym) and
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(srsym.owner.symtabletype in [staticsymtable,globalsymtable]) and
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srsym.owner.iscurrentunit then
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||
begin
|
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{ Add . to create System.Identifier }
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||
actasmpattern:=actasmpattern+c;
|
||
c:=current_scanner.asmgetchar;
|
||
{ Delphi allows System.@Halt, just ignore the @ }
|
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if c='@' then
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c:=current_scanner.asmgetchar;
|
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while c in ['A'..'Z','a'..'z','0'..'9','_','$'] do
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begin
|
||
actasmpattern:=actasmpattern + upcase(c);
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c:=current_scanner.asmgetchar;
|
||
end;
|
||
end;
|
||
end;
|
||
actasmtoken:=AS_ID;
|
||
exit;
|
||
end;
|
||
|
||
'''' : { string or character }
|
||
begin
|
||
actasmpattern:='';
|
||
current_scanner.in_asm_string:=true;
|
||
repeat
|
||
if c = '''' then
|
||
begin
|
||
c:=current_scanner.asmgetchar;
|
||
if c in [#10,#13] then
|
||
begin
|
||
Message(scan_f_string_exceeds_line);
|
||
break;
|
||
end;
|
||
repeat
|
||
if c='''' then
|
||
begin
|
||
c:=current_scanner.asmgetchar;
|
||
if c='''' then
|
||
begin
|
||
actasmpattern:=actasmpattern+'''';
|
||
c:=current_scanner.asmgetchar;
|
||
if c in [#10,#13] then
|
||
begin
|
||
Message(scan_f_string_exceeds_line);
|
||
break;
|
||
end;
|
||
end
|
||
else
|
||
break;
|
||
end
|
||
else
|
||
begin
|
||
actasmpattern:=actasmpattern+c;
|
||
c:=current_scanner.asmgetchar;
|
||
if c in [#10,#13] then
|
||
begin
|
||
Message(scan_f_string_exceeds_line);
|
||
break
|
||
end;
|
||
end;
|
||
until false; { end repeat }
|
||
end
|
||
else
|
||
break; { end if }
|
||
until false;
|
||
current_scanner.in_asm_string:=false;
|
||
actasmtoken:=AS_STRING;
|
||
exit;
|
||
end;
|
||
|
||
'"' : { string or character }
|
||
begin
|
||
current_scanner.in_asm_string:=true;
|
||
actasmpattern:='';
|
||
repeat
|
||
if c = '"' then
|
||
begin
|
||
c:=current_scanner.asmgetchar;
|
||
if c in [#10,#13] then
|
||
begin
|
||
Message(scan_f_string_exceeds_line);
|
||
break;
|
||
end;
|
||
repeat
|
||
if c='"' then
|
||
begin
|
||
c:=current_scanner.asmgetchar;
|
||
if c='"' then
|
||
begin
|
||
actasmpattern:=actasmpattern+'"';
|
||
c:=current_scanner.asmgetchar;
|
||
if c in [#10,#13] then
|
||
begin
|
||
Message(scan_f_string_exceeds_line);
|
||
break;
|
||
end;
|
||
end
|
||
else
|
||
break;
|
||
end
|
||
else
|
||
begin
|
||
actasmpattern:=actasmpattern+c;
|
||
c:=current_scanner.asmgetchar;
|
||
if c in [#10,#13] then
|
||
begin
|
||
Message(scan_f_string_exceeds_line);
|
||
break
|
||
end;
|
||
end;
|
||
until false; { end repeat }
|
||
end
|
||
else
|
||
break; { end if }
|
||
until false;
|
||
current_scanner.in_asm_string:=false;
|
||
actasmtoken:=AS_STRING;
|
||
exit;
|
||
end;
|
||
|
||
'$' :
|
||
begin
|
||
c:=current_scanner.asmgetchar;
|
||
while c in ['0'..'9','A'..'F','a'..'f'] do
|
||
begin
|
||
actasmpattern:=actasmpattern + c;
|
||
c:=current_scanner.asmgetchar;
|
||
end;
|
||
actasmpattern:=tostr(ParseVal(actasmpattern,16));
|
||
actasmtoken:=AS_INTNUM;
|
||
exit;
|
||
end;
|
||
|
||
'&' : { identifier }
|
||
begin
|
||
actasmpattern:='';
|
||
c:=current_scanner.asmgetchar;
|
||
while c in ['A'..'Z','a'..'z','0'..'9','_'] do
|
||
begin
|
||
actasmpattern:=actasmpattern + c;
|
||
c:=current_scanner.asmgetchar;
|
||
end;
|
||
uppervar(actasmpattern);
|
||
actasmtoken:=AS_ID;
|
||
exit;
|
||
end;
|
||
|
||
',' :
|
||
begin
|
||
actasmtoken:=AS_COMMA;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
'[' :
|
||
begin
|
||
actasmtoken:=AS_LBRACKET;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
']' :
|
||
begin
|
||
actasmtoken:=AS_RBRACKET;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
'(' :
|
||
begin
|
||
actasmtoken:=AS_LPAREN;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
')' :
|
||
begin
|
||
actasmtoken:=AS_RPAREN;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
':' :
|
||
begin
|
||
actasmtoken:=AS_COLON;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
'.' :
|
||
begin
|
||
actasmtoken:=AS_DOT;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
'+' :
|
||
begin
|
||
actasmtoken:=AS_PLUS;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
'-' :
|
||
begin
|
||
actasmtoken:=AS_MINUS;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
'*' :
|
||
begin
|
||
actasmtoken:=AS_STAR;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
'/' :
|
||
begin
|
||
actasmtoken:=AS_SLASH;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
|
||
'0'..'9':
|
||
begin
|
||
actasmpattern:=c;
|
||
c:=current_scanner.asmgetchar;
|
||
{ Get the possible characters }
|
||
while c in ['0'..'9','A'..'F','a'..'f'] do
|
||
begin
|
||
actasmpattern:=actasmpattern + c;
|
||
c:=current_scanner.asmgetchar;
|
||
end;
|
||
{ Get ending character }
|
||
uppervar(actasmpattern);
|
||
c:=upcase(c);
|
||
{ possibly a binary number. }
|
||
if (actasmpattern[length(actasmpattern)] = 'B') and (c <> 'H') then
|
||
Begin
|
||
{ Delete the last binary specifier }
|
||
delete(actasmpattern,length(actasmpattern),1);
|
||
actasmpattern:=tostr(ParseVal(actasmpattern,2));
|
||
actasmtoken:=AS_INTNUM;
|
||
exit;
|
||
end
|
||
else
|
||
Begin
|
||
case c of
|
||
'O' :
|
||
Begin
|
||
actasmpattern:=tostr(ParseVal(actasmpattern,8));
|
||
actasmtoken:=AS_INTNUM;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
'H' :
|
||
Begin
|
||
actasmpattern:=tostr(ParseVal(actasmpattern,16));
|
||
actasmtoken:=AS_INTNUM;
|
||
c:=current_scanner.asmgetchar;
|
||
exit;
|
||
end;
|
||
else { must be an integer number }
|
||
begin
|
||
actasmpattern:=tostr(ParseVal(actasmpattern,10));
|
||
actasmtoken:=AS_INTNUM;
|
||
exit;
|
||
end;
|
||
end;
|
||
end;
|
||
end;
|
||
';','{',#13,#10 :
|
||
begin
|
||
c:=current_scanner.asmgetchar;
|
||
firsttoken:=TRUE;
|
||
actasmtoken:=AS_SEPARATOR;
|
||
exit;
|
||
end;
|
||
|
||
else
|
||
current_scanner.illegal_char(c);
|
||
end;
|
||
end;
|
||
end;
|
||
|
||
|
||
function tx86intreader.consume(t : tasmtoken):boolean;
|
||
begin
|
||
Consume:=true;
|
||
if t<>actasmtoken then
|
||
begin
|
||
Message2(scan_f_syn_expected,token2str[t],token2str[actasmtoken]);
|
||
Consume:=false;
|
||
end;
|
||
repeat
|
||
gettoken;
|
||
until actasmtoken<>AS_NONE;
|
||
end;
|
||
|
||
|
||
procedure tx86intreader.RecoverConsume(allowcomma:boolean);
|
||
begin
|
||
While not (actasmtoken in [AS_SEPARATOR,AS_END]) do
|
||
begin
|
||
if allowcomma and (actasmtoken=AS_COMMA) then
|
||
break;
|
||
Consume(actasmtoken);
|
||
end;
|
||
end;
|
||
|
||
|
||
{*****************************************************************************
|
||
Parsing Helpers
|
||
*****************************************************************************}
|
||
|
||
{ This routine builds up a record offset after a AS_DOT
|
||
token is encountered.
|
||
On entry actasmtoken should be equal to AS_DOT }
|
||
Procedure tx86intreader.BuildRecordOffsetSize(const expr: string;var offset:aint;var size:aint; var mangledname: string; needvmtofs: boolean);
|
||
var
|
||
s: string;
|
||
Begin
|
||
offset:=0;
|
||
size:=0;
|
||
s:=expr;
|
||
while (actasmtoken=AS_DOT) do
|
||
begin
|
||
Consume(AS_DOT);
|
||
if actasmtoken in [AS_BYTE,AS_ID,AS_WORD,AS_DWORD,AS_QWORD] then
|
||
begin
|
||
s:=s+'.'+actasmpattern;
|
||
consume(actasmtoken);
|
||
end
|
||
else
|
||
begin
|
||
Consume(AS_ID);
|
||
RecoverConsume(true);
|
||
break;
|
||
end;
|
||
end;
|
||
if not GetRecordOffsetSize(s,offset,size,mangledname,needvmtofs) then
|
||
Message(asmr_e_building_record_offset);
|
||
end;
|
||
|
||
|
||
Procedure tx86intreader.BuildConstSymbolExpression(needofs,isref,startingminus:boolean;var value:aint;var asmsym:string;var asmsymtyp:TAsmsymtype);
|
||
var
|
||
tempstr,expr,hs,mangledname : string;
|
||
parenlevel : longint;
|
||
l,k : aint;
|
||
hasparen,
|
||
errorflag,
|
||
needvmtofs : boolean;
|
||
prevtok : tasmtoken;
|
||
hl : tasmlabel;
|
||
hssymtyp : Tasmsymtype;
|
||
def : tdef;
|
||
sym : tsym;
|
||
srsymtable : TSymtable;
|
||
Begin
|
||
{ reset }
|
||
value:=0;
|
||
asmsym:='';
|
||
asmsymtyp:=AT_DATA;
|
||
errorflag:=FALSE;
|
||
tempstr:='';
|
||
expr:='';
|
||
if startingminus then
|
||
expr:='-';
|
||
inexpression:=TRUE;
|
||
parenlevel:=0;
|
||
sym:=nil;
|
||
needvmtofs:=FALSE;
|
||
Repeat
|
||
{ Support ugly delphi constructs like: [ECX].1+2[EDX] }
|
||
if isref and (actasmtoken=AS_LBRACKET) then
|
||
break;
|
||
Case actasmtoken of
|
||
AS_LPAREN:
|
||
Begin
|
||
Consume(AS_LPAREN);
|
||
expr:=expr + '(';
|
||
inc(parenlevel);
|
||
end;
|
||
AS_RPAREN:
|
||
Begin
|
||
{ Keep the AS_PAREN in actasmtoken, it is maybe a typecast }
|
||
if parenlevel=0 then
|
||
break;
|
||
Consume(AS_RPAREN);
|
||
expr:=expr + ')';
|
||
dec(parenlevel);
|
||
end;
|
||
AS_SHL:
|
||
Begin
|
||
Consume(AS_SHL);
|
||
expr:=expr + '<';
|
||
end;
|
||
AS_SHR:
|
||
Begin
|
||
Consume(AS_SHR);
|
||
expr:=expr + '>';
|
||
end;
|
||
AS_SLASH:
|
||
Begin
|
||
Consume(AS_SLASH);
|
||
expr:=expr + '/';
|
||
end;
|
||
AS_MOD:
|
||
Begin
|
||
Consume(AS_MOD);
|
||
expr:=expr + '%';
|
||
end;
|
||
AS_STAR:
|
||
Begin
|
||
Consume(AS_STAR);
|
||
if isref and (actasmtoken=AS_REGISTER) then
|
||
break;
|
||
expr:=expr + '*';
|
||
end;
|
||
AS_PLUS:
|
||
Begin
|
||
Consume(AS_PLUS);
|
||
if isref and (actasmtoken=AS_REGISTER) then
|
||
break;
|
||
expr:=expr + '+';
|
||
end;
|
||
AS_MINUS:
|
||
Begin
|
||
Consume(AS_MINUS);
|
||
expr:=expr + '-';
|
||
end;
|
||
AS_AND:
|
||
Begin
|
||
Consume(AS_AND);
|
||
expr:=expr + '&';
|
||
end;
|
||
AS_NOT:
|
||
Begin
|
||
Consume(AS_NOT);
|
||
expr:=expr + '~';
|
||
end;
|
||
AS_XOR:
|
||
Begin
|
||
Consume(AS_XOR);
|
||
expr:=expr + '^';
|
||
end;
|
||
AS_OR:
|
||
Begin
|
||
Consume(AS_OR);
|
||
expr:=expr + '|';
|
||
end;
|
||
AS_INTNUM:
|
||
Begin
|
||
expr:=expr + actasmpattern;
|
||
Consume(AS_INTNUM);
|
||
end;
|
||
AS_VMTOFFSET,
|
||
AS_OFFSET:
|
||
begin
|
||
if (actasmtoken = AS_OFFSET) then
|
||
needofs:=true
|
||
else
|
||
needvmtofs:=true;
|
||
Consume(actasmtoken);
|
||
if actasmtoken<>AS_ID then
|
||
Message(asmr_e_offset_without_identifier);
|
||
end;
|
||
AS_SIZEOF,
|
||
AS_TYPE:
|
||
begin
|
||
l:=0;
|
||
hasparen:=false;
|
||
Consume(actasmtoken);
|
||
if actasmtoken=AS_LPAREN then
|
||
begin
|
||
hasparen:=true;
|
||
Consume(AS_LPAREN);
|
||
end;
|
||
if actasmtoken<>AS_ID then
|
||
Message(asmr_e_type_without_identifier)
|
||
else
|
||
begin
|
||
tempstr:=actasmpattern;
|
||
Consume(AS_ID);
|
||
if actasmtoken=AS_DOT then
|
||
begin
|
||
BuildRecordOffsetSize(tempstr,k,l,mangledname,false);
|
||
if mangledname<>'' then
|
||
{ procsym }
|
||
Message(asmr_e_wrong_sym_type);
|
||
end
|
||
else
|
||
begin
|
||
asmsearchsym(tempstr,sym,srsymtable);
|
||
if assigned(sym) then
|
||
begin
|
||
case sym.typ of
|
||
staticvarsym,
|
||
localvarsym,
|
||
paravarsym :
|
||
l:=tabstractvarsym(sym).getsize;
|
||
typesym :
|
||
l:=ttypesym(sym).typedef.size;
|
||
else
|
||
Message(asmr_e_wrong_sym_type);
|
||
end;
|
||
end
|
||
else
|
||
Message1(sym_e_unknown_id,tempstr);
|
||
end;
|
||
end;
|
||
str(l, tempstr);
|
||
expr:=expr + tempstr;
|
||
if hasparen then
|
||
Consume(AS_RPAREN);
|
||
end;
|
||
AS_PTR :
|
||
begin
|
||
{ Support ugly delphi constructs like <constant> PTR [ref] }
|
||
break;
|
||
end;
|
||
AS_STRING:
|
||
begin
|
||
l:=0;
|
||
case Length(actasmpattern) of
|
||
1 :
|
||
l:=ord(actasmpattern[1]);
|
||
2 :
|
||
l:=ord(actasmpattern[2]) + ord(actasmpattern[1]) shl 8;
|
||
3 :
|
||
l:=ord(actasmpattern[3]) +
|
||
Ord(actasmpattern[2]) shl 8 + ord(actasmpattern[1]) shl 16;
|
||
4 :
|
||
l:=ord(actasmpattern[4]) + ord(actasmpattern[3]) shl 8 +
|
||
Ord(actasmpattern[2]) shl 16 + ord(actasmpattern[1]) shl 24;
|
||
else
|
||
Message1(asmr_e_invalid_string_as_opcode_operand,actasmpattern);
|
||
end;
|
||
str(l, tempstr);
|
||
expr:=expr + tempstr;
|
||
Consume(AS_STRING);
|
||
end;
|
||
AS_ID:
|
||
begin
|
||
hs:='';
|
||
hssymtyp:=AT_DATA;
|
||
def:=nil;
|
||
tempstr:=actasmpattern;
|
||
prevtok:=prevasmtoken;
|
||
{ stop parsing a constant expression if we find an opcode after a
|
||
non-operator like "db $66 mov eax,ebx" }
|
||
if (prevtok in [AS_ID,AS_INTNUM,AS_RPAREN]) and
|
||
is_asmopcode(actasmpattern) then
|
||
break;
|
||
consume(AS_ID);
|
||
if SearchIConstant(tempstr,l) then
|
||
begin
|
||
str(l, tempstr);
|
||
expr:=expr + tempstr;
|
||
end
|
||
else
|
||
begin
|
||
if is_locallabel(tempstr) then
|
||
begin
|
||
CreateLocalLabel(tempstr,hl,false);
|
||
hs:=hl.name;
|
||
hssymtyp:=AT_FUNCTION;
|
||
end
|
||
else
|
||
if SearchLabel(tempstr,hl,false) then
|
||
begin
|
||
hs:=hl.name;
|
||
hssymtyp:=AT_FUNCTION;
|
||
end
|
||
else
|
||
begin
|
||
asmsearchsym(tempstr,sym,srsymtable);
|
||
if assigned(sym) then
|
||
begin
|
||
case sym.typ of
|
||
staticvarsym :
|
||
begin
|
||
hs:=tstaticvarsym(sym).mangledname;
|
||
def:=tstaticvarsym(sym).vardef;
|
||
end;
|
||
localvarsym,
|
||
paravarsym :
|
||
begin
|
||
Message(asmr_e_no_local_or_para_allowed);
|
||
end;
|
||
procsym :
|
||
begin
|
||
if Tprocsym(sym).ProcdefList.Count>1 then
|
||
Message(asmr_w_calling_overload_func);
|
||
hs:=tprocdef(tprocsym(sym).ProcdefList[0]).mangledname;
|
||
hssymtyp:=AT_FUNCTION;
|
||
end;
|
||
typesym :
|
||
begin
|
||
if not(ttypesym(sym).typedef.typ in [recorddef,objectdef]) then
|
||
Message(asmr_e_wrong_sym_type);
|
||
end;
|
||
fieldvarsym :
|
||
begin
|
||
tempstr:=upper(tdef(sym.owner.defowner).GetTypeName)+'.'+tempstr;
|
||
end;
|
||
else
|
||
Message(asmr_e_wrong_sym_type);
|
||
end;
|
||
end
|
||
else
|
||
Message1(sym_e_unknown_id,tempstr);
|
||
end;
|
||
{ symbol found? }
|
||
if hs<>'' then
|
||
begin
|
||
if asmsym='' then
|
||
begin
|
||
asmsym:=hs;
|
||
asmsymtyp:=hssymtyp;
|
||
end
|
||
else
|
||
Message(asmr_e_cant_have_multiple_relocatable_symbols);
|
||
if (expr='') or (expr[length(expr)]='+') then
|
||
begin
|
||
{ don't remove the + if there could be a record field }
|
||
if actasmtoken<>AS_DOT then
|
||
delete(expr,length(expr),1);
|
||
end
|
||
else
|
||
if needofs then
|
||
begin
|
||
if (prevtok<>AS_OFFSET) then
|
||
Message(asmr_e_need_offset);
|
||
end
|
||
else
|
||
Message(asmr_e_only_add_relocatable_symbol);
|
||
end;
|
||
if (actasmtoken=AS_DOT) or
|
||
(assigned(sym) and
|
||
(sym.typ = fieldvarsym)) then
|
||
begin
|
||
BuildRecordOffsetSize(tempstr,l,k,hs,needvmtofs);
|
||
if hs <> '' then
|
||
hssymtyp:=AT_FUNCTION
|
||
else
|
||
begin
|
||
str(l, tempstr);
|
||
expr:=expr + tempstr;
|
||
end
|
||
end
|
||
else
|
||
begin
|
||
if (expr='') or (expr[length(expr)] in ['+','-','/','*']) then
|
||
delete(expr,length(expr),1);
|
||
end;
|
||
if (actasmtoken=AS_LBRACKET) and
|
||
assigned(def) and
|
||
(def.typ=arraydef) then
|
||
begin
|
||
consume(AS_LBRACKET);
|
||
l:=BuildConstExpression;
|
||
if l<tarraydef(def).lowrange then
|
||
begin
|
||
Message(asmr_e_constant_out_of_bounds);
|
||
l:=0;
|
||
end
|
||
else
|
||
l:=(l-tarraydef(def).lowrange)*tarraydef(def).elesize;
|
||
str(l, tempstr);
|
||
expr:=expr + '+' + tempstr;
|
||
consume(AS_RBRACKET);
|
||
end;
|
||
end;
|
||
{ check if there are wrong operator used like / or mod etc. }
|
||
if (hs<>'') and not(actasmtoken in [AS_MINUS,AS_PLUS,AS_COMMA,AS_SEPARATOR,AS_END,AS_RBRACKET]) then
|
||
Message(asmr_e_only_add_relocatable_symbol);
|
||
end;
|
||
AS_ALIGN,
|
||
AS_DB,
|
||
AS_DW,
|
||
AS_DD,
|
||
AS_DQ,
|
||
AS_END,
|
||
AS_RBRACKET,
|
||
AS_SEPARATOR,
|
||
AS_COMMA,
|
||
AS_COLON:
|
||
break;
|
||
else
|
||
begin
|
||
{ write error only once. }
|
||
if not errorflag then
|
||
Message(asmr_e_invalid_constant_expression);
|
||
{ consume tokens until we find COMMA or SEPARATOR }
|
||
Consume(actasmtoken);
|
||
errorflag:=TRUE;
|
||
end;
|
||
end;
|
||
Until false;
|
||
{ calculate expression }
|
||
if not ErrorFlag then
|
||
value:=CalculateExpression(expr)
|
||
else
|
||
value:=0;
|
||
{ no longer in an expression }
|
||
inexpression:=FALSE;
|
||
end;
|
||
|
||
|
||
Function tx86intreader.BuildConstExpression:aint;
|
||
var
|
||
l : aint;
|
||
hs : string;
|
||
hssymtyp : TAsmsymtype;
|
||
begin
|
||
BuildConstSymbolExpression(false,false,false,l,hs,hssymtyp);
|
||
if hs<>'' then
|
||
Message(asmr_e_relocatable_symbol_not_allowed);
|
||
BuildConstExpression:=l;
|
||
end;
|
||
|
||
|
||
Function tx86intreader.BuildRefConstExpression:aint;
|
||
var
|
||
l : aint;
|
||
hs : string;
|
||
hssymtyp : TAsmsymtype;
|
||
begin
|
||
BuildConstSymbolExpression(false,true,false,l,hs,hssymtyp);
|
||
if hs<>'' then
|
||
Message(asmr_e_relocatable_symbol_not_allowed);
|
||
BuildRefConstExpression:=l;
|
||
end;
|
||
|
||
|
||
procedure tx86intreader.BuildReference(oper : tx86operand);
|
||
var
|
||
scale : byte;
|
||
k,l : aint;
|
||
tempstr,hs : string;
|
||
tempsymtyp : tasmsymtype;
|
||
code : integer;
|
||
hreg : tregister;
|
||
GotStar,GotOffset,HadVar,
|
||
GotPlus,Negative : boolean;
|
||
hl : tasmlabel;
|
||
Begin
|
||
Consume(AS_LBRACKET);
|
||
if not(oper.opr.typ in [OPR_LOCAL,OPR_REFERENCE]) then
|
||
oper.InitRef;
|
||
GotStar:=false;
|
||
GotPlus:=true;
|
||
GotOffset:=false;
|
||
Negative:=false;
|
||
Scale:=0;
|
||
repeat
|
||
if GotOffset and (actasmtoken<>AS_ID) then
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
|
||
Case actasmtoken of
|
||
AS_ID, { Constant reference expression OR variable reference expression }
|
||
AS_VMTOFFSET:
|
||
Begin
|
||
if not GotPlus then
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
GotStar:=false;
|
||
GotPlus:=false;
|
||
if (actasmtoken = AS_VMTOFFSET) or
|
||
(SearchIConstant(actasmpattern,l) or
|
||
SearchRecordType(actasmpattern)) then
|
||
begin
|
||
l:=BuildRefConstExpression;
|
||
GotPlus:=(prevasmtoken=AS_PLUS);
|
||
GotStar:=(prevasmtoken=AS_STAR);
|
||
case oper.opr.typ of
|
||
OPR_LOCAL :
|
||
begin
|
||
if GotStar then
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
if negative then
|
||
Dec(oper.opr.localsymofs,l)
|
||
else
|
||
Inc(oper.opr.localsymofs,l);
|
||
end;
|
||
OPR_REFERENCE :
|
||
begin
|
||
if GotStar then
|
||
oper.opr.ref.scalefactor:=l
|
||
else
|
||
begin
|
||
if negative then
|
||
Dec(oper.opr.ref.offset,l)
|
||
else
|
||
Inc(oper.opr.ref.offset,l);
|
||
end;
|
||
end;
|
||
end;
|
||
end
|
||
else
|
||
Begin
|
||
if negative and not oper.hasvar then
|
||
Message(asmr_e_only_add_relocatable_symbol)
|
||
else if oper.hasvar and not GotOffset and
|
||
(not negative or assigned(oper.opr.ref.relsymbol)) then
|
||
Message(asmr_e_cant_have_multiple_relocatable_symbols);
|
||
HadVar:=oper.hasvar and GotOffset;
|
||
tempstr:=actasmpattern;
|
||
Consume(AS_ID);
|
||
{ typecasting? }
|
||
if (actasmtoken=AS_LPAREN) and
|
||
SearchType(tempstr,l) then
|
||
begin
|
||
oper.hastype:=true;
|
||
oper.typesize:=l;
|
||
Consume(AS_LPAREN);
|
||
BuildOperand(oper,true);
|
||
Consume(AS_RPAREN);
|
||
end
|
||
else
|
||
if is_locallabel(tempstr) then
|
||
begin
|
||
CreateLocalLabel(tempstr,hl,false);
|
||
oper.InitRef;
|
||
if not negative then
|
||
begin
|
||
oper.opr.ref.symbol:=hl;
|
||
oper.hasvar:=true;
|
||
end
|
||
else
|
||
oper.opr.ref.relsymbol:=hl;
|
||
end
|
||
else
|
||
if oper.SetupVar(tempstr,GotOffset) then
|
||
begin
|
||
{ force OPR_LOCAL to be a reference }
|
||
if oper.opr.typ=OPR_LOCAL then
|
||
oper.opr.localforceref:=true;
|
||
end
|
||
else
|
||
Message1(sym_e_unknown_id,tempstr);
|
||
{ record.field ? }
|
||
if actasmtoken=AS_DOT then
|
||
begin
|
||
BuildRecordOffsetSize(tempstr,l,k,hs,false);
|
||
if (hs<>'') then
|
||
Message(asmr_e_invalid_symbol_ref);
|
||
case oper.opr.typ of
|
||
OPR_LOCAL :
|
||
inc(oper.opr.localsymofs,l);
|
||
OPR_REFERENCE :
|
||
inc(oper.opr.ref.offset,l);
|
||
end;
|
||
end;
|
||
if GotOffset then
|
||
begin
|
||
if oper.hasvar and (oper.opr.ref.base=current_procinfo.framepointer) then
|
||
begin
|
||
if (oper.opr.typ=OPR_REFERENCE) then
|
||
oper.opr.ref.base:=NR_NO;
|
||
oper.hasvar:=hadvar;
|
||
end
|
||
else
|
||
begin
|
||
if oper.hasvar and hadvar then
|
||
Message(asmr_e_cant_have_multiple_relocatable_symbols);
|
||
{ should we allow ?? }
|
||
end;
|
||
end;
|
||
end;
|
||
GotOffset:=false;
|
||
end;
|
||
|
||
AS_PLUS :
|
||
Begin
|
||
Consume(AS_PLUS);
|
||
Negative:=false;
|
||
GotPlus:=true;
|
||
GotStar:=false;
|
||
Scale:=0;
|
||
end;
|
||
|
||
AS_DOT :
|
||
Begin
|
||
{ Handle like a + }
|
||
Consume(AS_DOT);
|
||
Negative:=false;
|
||
GotPlus:=true;
|
||
GotStar:=false;
|
||
Scale:=0;
|
||
end;
|
||
|
||
AS_MINUS :
|
||
begin
|
||
Consume(AS_MINUS);
|
||
Negative:=true;
|
||
GotPlus:=true;
|
||
GotStar:=false;
|
||
Scale:=0;
|
||
end;
|
||
|
||
AS_STAR : { Scaling, with eax*4 order }
|
||
begin
|
||
Consume(AS_STAR);
|
||
hs:='';
|
||
l:=0;
|
||
case actasmtoken of
|
||
AS_LPAREN :
|
||
l:=BuildConstExpression;
|
||
AS_INTNUM:
|
||
Begin
|
||
hs:=actasmpattern;
|
||
Consume(AS_INTNUM);
|
||
end;
|
||
AS_REGISTER :
|
||
begin
|
||
case oper.opr.typ of
|
||
OPR_REFERENCE :
|
||
begin
|
||
if oper.opr.ref.scalefactor=0 then
|
||
begin
|
||
if scale<>0 then
|
||
begin
|
||
oper.opr.ref.scalefactor:=scale;
|
||
scale:=0;
|
||
end
|
||
else
|
||
Message(asmr_e_wrong_scale_factor);
|
||
end
|
||
else
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
end;
|
||
OPR_LOCAL :
|
||
begin
|
||
if oper.opr.localscale=0 then
|
||
begin
|
||
if scale<>0 then
|
||
begin
|
||
oper.opr.localscale:=scale;
|
||
scale:=0;
|
||
end
|
||
else
|
||
Message(asmr_e_wrong_scale_factor);
|
||
end
|
||
else
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
end;
|
||
end;
|
||
end;
|
||
else
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
end;
|
||
if actasmtoken<>AS_REGISTER then
|
||
begin
|
||
if hs<>'' then
|
||
val(hs,l,code);
|
||
case oper.opr.typ of
|
||
OPR_REFERENCE :
|
||
oper.opr.ref.scalefactor:=l;
|
||
OPR_LOCAL :
|
||
oper.opr.localscale:=l;
|
||
end;
|
||
if l>9 then
|
||
Message(asmr_e_wrong_scale_factor);
|
||
end;
|
||
GotPlus:=false;
|
||
GotStar:=false;
|
||
end;
|
||
|
||
AS_REGISTER :
|
||
begin
|
||
if not((GotPlus and (not Negative)) or
|
||
GotStar) then
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
hreg:=actasmregister;
|
||
Consume(AS_REGISTER);
|
||
{ this register will be the index:
|
||
1. just read a *
|
||
2. next token is a *
|
||
3. base register is already used }
|
||
case oper.opr.typ of
|
||
OPR_LOCAL :
|
||
begin
|
||
if (oper.opr.localindexreg<>NR_NO) then
|
||
Message(asmr_e_multiple_index);
|
||
oper.opr.localindexreg:=hreg;
|
||
if scale<>0 then
|
||
begin
|
||
oper.opr.localscale:=scale;
|
||
scale:=0;
|
||
end;
|
||
end;
|
||
OPR_REFERENCE :
|
||
begin
|
||
if (GotStar) or
|
||
(actasmtoken=AS_STAR) or
|
||
(oper.opr.ref.base<>NR_NO) then
|
||
begin
|
||
if (oper.opr.ref.index<>NR_NO) then
|
||
Message(asmr_e_multiple_index);
|
||
oper.opr.ref.index:=hreg;
|
||
if scale<>0 then
|
||
begin
|
||
oper.opr.ref.scalefactor:=scale;
|
||
scale:=0;
|
||
end;
|
||
end
|
||
else
|
||
oper.opr.ref.base:=hreg;
|
||
end;
|
||
end;
|
||
GotPlus:=false;
|
||
GotStar:=false;
|
||
end;
|
||
|
||
AS_OFFSET :
|
||
begin
|
||
Consume(AS_OFFSET);
|
||
GotOffset:=true;
|
||
end;
|
||
|
||
AS_TYPE,
|
||
AS_NOT,
|
||
AS_STRING,
|
||
AS_INTNUM,
|
||
AS_LPAREN : { Constant reference expression }
|
||
begin
|
||
if not GotPlus and not GotStar then
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
BuildConstSymbolExpression(true,true,GotPlus and negative,l,tempstr,tempsymtyp);
|
||
{ already handled by BuildConstSymbolExpression(); must be
|
||
handled there to avoid [reg-1+1] being interpreted as
|
||
[reg-(1+1)] }
|
||
negative:=false;
|
||
|
||
if tempstr<>'' then
|
||
begin
|
||
if GotStar then
|
||
Message(asmr_e_only_add_relocatable_symbol);
|
||
if not assigned(oper.opr.ref.symbol) then
|
||
oper.opr.ref.symbol:=current_asmdata.RefAsmSymbol(tempstr)
|
||
else
|
||
Message(asmr_e_cant_have_multiple_relocatable_symbols);
|
||
end;
|
||
case oper.opr.typ of
|
||
OPR_REFERENCE :
|
||
begin
|
||
if GotStar then
|
||
oper.opr.ref.scalefactor:=l
|
||
else if (prevasmtoken = AS_STAR) then
|
||
begin
|
||
if scale<>0 then
|
||
scale:=l*scale
|
||
else
|
||
scale:=l;
|
||
end
|
||
else
|
||
Inc(oper.opr.ref.offset,l);
|
||
end;
|
||
OPR_LOCAL :
|
||
begin
|
||
if GotStar then
|
||
oper.opr.localscale:=l
|
||
else if (prevasmtoken = AS_STAR) then
|
||
begin
|
||
if scale<>0 then
|
||
scale:=l*scale
|
||
else
|
||
scale:=l;
|
||
end
|
||
else
|
||
Inc(oper.opr.localsymofs,l);
|
||
end;
|
||
end;
|
||
GotPlus:=(prevasmtoken=AS_PLUS) or
|
||
(prevasmtoken=AS_MINUS);
|
||
if GotPlus then
|
||
negative := prevasmtoken = AS_MINUS;
|
||
GotStar:=(prevasmtoken=AS_STAR);
|
||
end;
|
||
|
||
AS_RBRACKET :
|
||
begin
|
||
if GotPlus or GotStar then
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
Consume(AS_RBRACKET);
|
||
break;
|
||
end;
|
||
|
||
else
|
||
Begin
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
RecoverConsume(true);
|
||
break;
|
||
end;
|
||
end;
|
||
until false;
|
||
end;
|
||
|
||
|
||
Procedure tx86intreader.BuildConstantOperand(oper: tx86operand);
|
||
var
|
||
l : aint;
|
||
tempstr : string;
|
||
tempsymtyp : tasmsymtype;
|
||
begin
|
||
if not (oper.opr.typ in [OPR_NONE,OPR_CONSTANT]) then
|
||
Message(asmr_e_invalid_operand_type);
|
||
BuildConstSymbolExpression(true,false,false,l,tempstr,tempsymtyp);
|
||
if tempstr<>'' then
|
||
begin
|
||
oper.opr.typ:=OPR_SYMBOL;
|
||
oper.opr.symofs:=l;
|
||
oper.opr.symbol:=current_asmdata.RefAsmSymbol(tempstr);
|
||
end
|
||
else
|
||
if oper.opr.typ=OPR_NONE then
|
||
begin
|
||
oper.opr.typ:=OPR_CONSTANT;
|
||
oper.opr.val:=l;
|
||
end
|
||
else
|
||
inc(oper.opr.val,l);
|
||
end;
|
||
|
||
|
||
Procedure tx86intreader.BuildOperand(oper: tx86operand;istypecast:boolean);
|
||
|
||
procedure AddLabelOperand(hl:tasmlabel);
|
||
begin
|
||
if (oper.opr.typ=OPR_NONE) and
|
||
is_calljmp(actopcode) then
|
||
begin
|
||
oper.opr.typ:=OPR_SYMBOL;
|
||
oper.opr.symbol:=hl;
|
||
end
|
||
else
|
||
begin
|
||
oper.InitRef;
|
||
oper.opr.ref.symbol:=hl;
|
||
end;
|
||
end;
|
||
|
||
var
|
||
expr,
|
||
hs : string;
|
||
tempreg : tregister;
|
||
l : aint;
|
||
hl : tasmlabel;
|
||
toffset,
|
||
tsize : aint;
|
||
begin
|
||
expr:='';
|
||
repeat
|
||
if actasmtoken=AS_DOT then
|
||
begin
|
||
if expr<>'' then
|
||
begin
|
||
BuildRecordOffsetSize(expr,toffset,tsize,hs,false);
|
||
if (oper.opr.typ<>OPR_NONE) and
|
||
(hs<>'') then
|
||
Message(asmr_e_wrong_sym_type);
|
||
oper.SetSize(tsize,true);
|
||
{ we have used the size of a field. Reset the typesize of the record }
|
||
oper.typesize:=0;
|
||
case oper.opr.typ of
|
||
OPR_LOCAL :
|
||
begin
|
||
{ don't allow direct access to fields of parameters, because that
|
||
will generate buggy code. Allow it only for explicit typecasting
|
||
and when the parameter is in a register (delphi compatible) }
|
||
if (not oper.hastype) and
|
||
(oper.opr.localsym.owner.symtabletype=parasymtable) and
|
||
(current_procinfo.procdef.proccalloption<>pocall_register) then
|
||
Message(asmr_e_cannot_access_field_directly_for_parameters);
|
||
inc(oper.opr.localsymofs,toffset)
|
||
end;
|
||
OPR_CONSTANT :
|
||
inc(oper.opr.val,toffset);
|
||
OPR_REFERENCE :
|
||
inc(oper.opr.ref.offset,toffset);
|
||
OPR_NONE :
|
||
begin
|
||
if (hs <> '') then
|
||
begin
|
||
oper.opr.typ:=OPR_SYMBOL;
|
||
oper.opr.symbol:=current_asmdata.RefAsmSymbol(hs);
|
||
end
|
||
else
|
||
begin
|
||
oper.opr.typ:=OPR_CONSTANT;
|
||
oper.opr.val:=toffset;
|
||
end;
|
||
end;
|
||
OPR_REGISTER :
|
||
Message(asmr_e_invalid_reference_syntax);
|
||
OPR_SYMBOL:
|
||
Message(asmr_e_invalid_symbol_ref);
|
||
else
|
||
internalerror(200309222);
|
||
end;
|
||
expr:='';
|
||
end
|
||
else
|
||
begin
|
||
{ See it as a separator }
|
||
Consume(AS_DOT);
|
||
end;
|
||
end;
|
||
|
||
case actasmtoken of
|
||
AS_OFFSET,
|
||
AS_SIZEOF,
|
||
AS_VMTOFFSET,
|
||
AS_TYPE,
|
||
AS_NOT,
|
||
AS_STRING,
|
||
AS_PLUS,
|
||
AS_MINUS,
|
||
AS_LPAREN,
|
||
AS_INTNUM :
|
||
begin
|
||
case oper.opr.typ of
|
||
OPR_REFERENCE :
|
||
if (actasmtoken=AS_OFFSET) and
|
||
(cs_create_pic in current_settings.moduleswitches) then
|
||
begin
|
||
Consume(AS_OFFSET);
|
||
oper.opr.ref.refaddr:=addr_pic;
|
||
BuildOperand(oper,false);
|
||
end
|
||
else
|
||
inc(oper.opr.ref.offset,BuildRefConstExpression);
|
||
OPR_LOCAL :
|
||
inc(oper.opr.localsymofs,BuildConstExpression);
|
||
OPR_NONE,
|
||
OPR_CONSTANT :
|
||
BuildConstantOperand(oper);
|
||
else
|
||
Message(asmr_e_invalid_operand_type);
|
||
end;
|
||
end;
|
||
|
||
AS_PTR :
|
||
begin
|
||
if not oper.hastype then
|
||
begin
|
||
if (oper.opr.typ=OPR_CONSTANT) then
|
||
begin
|
||
oper.typesize:=oper.opr.val;
|
||
{ reset constant value of operand }
|
||
oper.opr.typ:=OPR_NONE;
|
||
oper.opr.val:=0;
|
||
end
|
||
else
|
||
Message(asmr_e_syn_operand);
|
||
end;
|
||
Consume(AS_PTR);
|
||
oper.InitRef;
|
||
{ if the operand subscripts a record, the typesize will be
|
||
rest -> save it here and restore it afterwards }
|
||
l:=oper.typesize;
|
||
BuildOperand(oper,false);
|
||
oper.setsize(l,true);
|
||
end;
|
||
|
||
AS_ID : { A constant expression, or a Variable ref. }
|
||
Begin
|
||
{ Label or Special symbol reference? }
|
||
if actasmpattern[1] = '@' then
|
||
Begin
|
||
if actasmpattern = '@RESULT' then
|
||
Begin
|
||
oper.SetupResult;
|
||
Consume(AS_ID);
|
||
end
|
||
else
|
||
if (actasmpattern = '@CODE') or (actasmpattern = '@DATA') then
|
||
begin
|
||
Message(asmr_w_CODE_and_DATA_not_supported);
|
||
Consume(AS_ID);
|
||
end
|
||
else
|
||
{ Local Label }
|
||
begin
|
||
CreateLocalLabel(actasmpattern,hl,false);
|
||
Consume(AS_ID);
|
||
AddLabelOperand(hl);
|
||
end;
|
||
end
|
||
else
|
||
{ support result for delphi modes }
|
||
if (m_objpas in current_settings.modeswitches) and (actasmpattern='RESULT') then
|
||
begin
|
||
oper.SetUpResult;
|
||
Consume(AS_ID);
|
||
end
|
||
{ probably a variable or normal expression }
|
||
{ or a procedure (such as in CALL ID) }
|
||
else
|
||
Begin
|
||
{ is it a constant ? }
|
||
if SearchIConstant(actasmpattern,l) then
|
||
Begin
|
||
case oper.opr.typ of
|
||
OPR_REFERENCE :
|
||
inc(oper.opr.ref.offset,BuildRefConstExpression);
|
||
OPR_LOCAL :
|
||
inc(oper.opr.localsymofs,BuildRefConstExpression);
|
||
OPR_NONE,
|
||
OPR_CONSTANT :
|
||
BuildConstantOperand(oper);
|
||
else
|
||
Message(asmr_e_invalid_operand_type);
|
||
end;
|
||
end
|
||
else
|
||
{ Check for pascal label }
|
||
if SearchLabel(actasmpattern,hl,false) then
|
||
begin
|
||
Consume(AS_ID);
|
||
AddLabelOperand(hl);
|
||
end
|
||
else
|
||
{ is it a normal variable ? }
|
||
Begin
|
||
expr:=actasmpattern;
|
||
Consume(AS_ID);
|
||
{ typecasting? }
|
||
if SearchType(expr,l) then
|
||
begin
|
||
oper.hastype:=true;
|
||
oper.typesize:=l;
|
||
case actasmtoken of
|
||
AS_LPAREN :
|
||
begin
|
||
{ Support Type([Reference]) }
|
||
Consume(AS_LPAREN);
|
||
BuildOperand(oper,true);
|
||
{ Delphi also supports Type(Register) and
|
||
interprets it the same as Type([Register]). }
|
||
if (oper.opr.typ = OPR_REGISTER) then
|
||
{ This also sets base to the register. }
|
||
oper.InitRef;
|
||
Consume(AS_RPAREN);
|
||
end;
|
||
AS_LBRACKET :
|
||
begin
|
||
{ Support Var.Type[Index] }
|
||
{ Convert @label.Byte[1] to reference }
|
||
if oper.opr.typ=OPR_SYMBOL then
|
||
oper.initref;
|
||
end;
|
||
end;
|
||
end
|
||
else
|
||
begin
|
||
if not oper.SetupVar(expr,false) then
|
||
Begin
|
||
{ not a variable, check special variables.. }
|
||
if expr = 'SELF' then
|
||
oper.SetupSelf
|
||
else
|
||
Message1(sym_e_unknown_id,expr);
|
||
expr:='';
|
||
end;
|
||
end;
|
||
end;
|
||
end;
|
||
end;
|
||
|
||
AS_REGISTER : { Register, a variable reference or a constant reference }
|
||
begin
|
||
{ save the type of register used. }
|
||
tempreg:=actasmregister;
|
||
Consume(AS_REGISTER);
|
||
if actasmtoken = AS_COLON then
|
||
Begin
|
||
Consume(AS_COLON);
|
||
oper.InitRef;
|
||
oper.opr.ref.segment:=tempreg;
|
||
BuildReference(oper);
|
||
end
|
||
else
|
||
{ Simple register }
|
||
begin
|
||
if not (oper.opr.typ in [OPR_NONE,OPR_REGISTER]) then
|
||
Message(asmr_e_invalid_operand_type);
|
||
oper.opr.typ:=OPR_REGISTER;
|
||
oper.opr.reg:=tempreg;
|
||
oper.SetSize(tcgsize2size[reg_cgsize(oper.opr.reg)],true);
|
||
end;
|
||
end;
|
||
|
||
AS_LBRACKET: { a variable reference, register ref. or a constant reference }
|
||
Begin
|
||
BuildReference(oper);
|
||
end;
|
||
|
||
AS_SEG :
|
||
Begin
|
||
Message(asmr_e_seg_not_supported);
|
||
Consume(actasmtoken);
|
||
end;
|
||
|
||
AS_DWORD,
|
||
AS_BYTE,
|
||
AS_WORD,
|
||
AS_TBYTE,
|
||
AS_DQWORD,
|
||
AS_QWORD :
|
||
begin
|
||
{ Type specifier }
|
||
oper.hastype:=true;
|
||
oper.typesize:=0;
|
||
case actasmtoken of
|
||
AS_DWORD : oper.typesize:=4;
|
||
AS_WORD : oper.typesize:=2;
|
||
AS_BYTE : oper.typesize:=1;
|
||
AS_QWORD : oper.typesize:=8;
|
||
AS_DQWORD : oper.typesize:=16;
|
||
AS_TBYTE : oper.typesize:=10;
|
||
else
|
||
internalerror(2010061101);
|
||
end;
|
||
Consume(actasmtoken);
|
||
if (actasmtoken=AS_LPAREN) then
|
||
begin
|
||
{ Support "xxx ptr [Reference]" }
|
||
{ in case the expression subscripts a record, the typesize
|
||
is reset, so save the explicit size we set above }
|
||
l:=oper.typesize;
|
||
Consume(AS_LPAREN);
|
||
BuildOperand(oper,true);
|
||
Consume(AS_RPAREN);
|
||
oper.setsize(l,true);
|
||
end;
|
||
end;
|
||
|
||
AS_SEPARATOR,
|
||
AS_END,
|
||
AS_COMMA,
|
||
AS_COLON:
|
||
begin
|
||
break;
|
||
end;
|
||
|
||
AS_RPAREN:
|
||
begin
|
||
if not istypecast then
|
||
begin
|
||
Message(asmr_e_syn_operand);
|
||
Consume(AS_RPAREN);
|
||
end
|
||
else
|
||
break;
|
||
end;
|
||
|
||
else
|
||
begin
|
||
Message(asmr_e_syn_operand);
|
||
RecoverConsume(true);
|
||
break;
|
||
end;
|
||
end;
|
||
until false;
|
||
{ End of operand, update size if a typecast is forced }
|
||
if (oper.typesize<>0) and
|
||
(oper.opr.typ in [OPR_REFERENCE,OPR_LOCAL]) then
|
||
oper.SetSize(oper.typesize,true);
|
||
end;
|
||
|
||
|
||
Procedure tx86intreader.BuildOpCode(instr : tx86instruction);
|
||
var
|
||
PrefixOp,OverrideOp: tasmop;
|
||
operandnum : longint;
|
||
is_far_const:boolean;
|
||
i:byte;
|
||
begin
|
||
PrefixOp:=A_None;
|
||
OverrideOp:=A_None;
|
||
is_far_const:=false;
|
||
{ prefix seg opcode / prefix opcode }
|
||
repeat
|
||
if is_prefix(actopcode) then
|
||
with instr do
|
||
begin
|
||
OpOrder:=op_intel;
|
||
PrefixOp:=ActOpcode;
|
||
opcode:=ActOpcode;
|
||
condition:=ActCondition;
|
||
opsize:=ActOpsize;
|
||
ConcatInstruction(curlist);
|
||
consume(AS_OPCODE);
|
||
end
|
||
else
|
||
if is_override(actopcode) then
|
||
with instr do
|
||
begin
|
||
OpOrder:=op_intel;
|
||
OverrideOp:=ActOpcode;
|
||
opcode:=ActOpcode;
|
||
condition:=ActCondition;
|
||
opsize:=ActOpsize;
|
||
ConcatInstruction(curlist);
|
||
consume(AS_OPCODE);
|
||
end
|
||
else
|
||
break;
|
||
{ allow for newline after prefix or override }
|
||
while actasmtoken=AS_SEPARATOR do
|
||
consume(AS_SEPARATOR);
|
||
until (actasmtoken<>AS_OPCODE);
|
||
{ opcode }
|
||
if (actasmtoken <> AS_OPCODE) then
|
||
begin
|
||
Message(asmr_e_invalid_or_missing_opcode);
|
||
RecoverConsume(false);
|
||
exit;
|
||
end;
|
||
{ Fill the instr object with the current state }
|
||
with instr do
|
||
begin
|
||
OpOrder:=op_intel;
|
||
Opcode:=ActOpcode;
|
||
condition:=ActCondition;
|
||
opsize:=ActOpsize;
|
||
|
||
{ Valid combination of prefix/override and instruction ? }
|
||
if (prefixop<>A_NONE) and (NOT CheckPrefix(PrefixOp,actopcode)) then
|
||
Message1(asmr_e_invalid_prefix_and_opcode,actasmpattern);
|
||
if (overrideop<>A_NONE) and (NOT CheckOverride(OverrideOp,ActOpcode)) then
|
||
Message1(asmr_e_invalid_override_and_opcode,actasmpattern);
|
||
end;
|
||
{ pushf/popf/pusha/popa have to default to 16 bit in Intel mode
|
||
(Intel manual and Delphi-compatbile) -- setting the opsize for
|
||
these instructions doesn't change anything in the internal assember,
|
||
so change the opcode }
|
||
if (instr.opcode=A_POPF) then
|
||
instr.opcode:=A_POPFW
|
||
else if (instr.opcode=A_PUSHF) then
|
||
instr.opcode:=A_PUSHFW
|
||
else if (instr.opcode=A_PUSHA) then
|
||
instr.opcode:=A_PUSHAW
|
||
else if (instr.opcode=A_POPA) then
|
||
instr.opcode:=A_POPAW;
|
||
{ We are reading operands, so opcode will be an AS_ID }
|
||
operandnum:=1;
|
||
is_far_const:=false;
|
||
Consume(AS_OPCODE);
|
||
{ Zero operand opcode ? }
|
||
if actasmtoken in [AS_SEPARATOR,AS_END] then
|
||
begin
|
||
operandnum:=0;
|
||
exit;
|
||
end;
|
||
{ Read Operands }
|
||
repeat
|
||
case actasmtoken of
|
||
{ End of asm operands for this opcode }
|
||
AS_END,
|
||
AS_SEPARATOR :
|
||
break;
|
||
|
||
{ Operand delimiter }
|
||
AS_COMMA :
|
||
begin
|
||
if operandnum > Max_Operands then
|
||
Message(asmr_e_too_many_operands)
|
||
else
|
||
Inc(operandnum);
|
||
Consume(AS_COMMA);
|
||
end;
|
||
|
||
{Far constant, i.e. jmp $0000:$11111111.}
|
||
AS_COLON:
|
||
begin
|
||
is_far_const:=true;
|
||
if operandnum>1 then
|
||
message(asmr_e_too_many_operands)
|
||
else
|
||
inc(operandnum);
|
||
consume(AS_COLON);
|
||
end;
|
||
|
||
{ Type specifier }
|
||
AS_NEAR,
|
||
AS_FAR :
|
||
begin
|
||
if actasmtoken = AS_NEAR then
|
||
begin
|
||
Message(asmr_w_near_ignored);
|
||
instr.opsize:=S_NEAR;
|
||
end
|
||
else
|
||
begin
|
||
Message(asmr_w_far_ignored);
|
||
instr.opsize:=S_FAR;
|
||
end;
|
||
Consume(actasmtoken);
|
||
if actasmtoken=AS_PTR then
|
||
begin
|
||
Consume(AS_PTR);
|
||
instr.Operands[operandnum].InitRef;
|
||
end;
|
||
BuildOperand(instr.Operands[operandnum] as tx86operand,false);
|
||
end;
|
||
else
|
||
BuildOperand(instr.Operands[operandnum] as tx86operand,false);
|
||
end; { end case }
|
||
until false;
|
||
instr.ops:=operandnum;
|
||
{ Check operands }
|
||
for i:=1 to operandnum do
|
||
begin
|
||
if is_far_const and
|
||
(instr.operands[i].opr.typ<>OPR_CONSTANT) then
|
||
message(asmr_e_expr_illegal)
|
||
else
|
||
if instr.operands[i].opr.typ=OPR_NONE then
|
||
Message(asmr_e_syntax_error);
|
||
end;
|
||
{ e.g. for "push dword 1", "push word 6" }
|
||
if (instr.ops=1) and
|
||
(instr.operands[1].typesize<>0) then
|
||
instr.operands[1].setsize(instr.operands[1].typesize,false);
|
||
end;
|
||
|
||
|
||
Procedure tx86intreader.BuildConstant(constsize: byte);
|
||
var
|
||
asmsymtyp : tasmsymtype;
|
||
asmsym,
|
||
expr: string;
|
||
value : aint;
|
||
Begin
|
||
Repeat
|
||
Case actasmtoken of
|
||
AS_STRING:
|
||
Begin
|
||
{ DD and DW cases }
|
||
if constsize <> 1 then
|
||
Begin
|
||
if Not PadZero(actasmpattern,constsize) then
|
||
Message(scan_f_string_exceeds_line);
|
||
end;
|
||
expr:=actasmpattern;
|
||
Consume(AS_STRING);
|
||
Case actasmtoken of
|
||
AS_COMMA:
|
||
Consume(AS_COMMA);
|
||
AS_END,
|
||
AS_SEPARATOR: ;
|
||
else
|
||
Message(asmr_e_invalid_string_expression);
|
||
end;
|
||
ConcatString(curlist,expr);
|
||
end;
|
||
AS_PLUS,
|
||
AS_MINUS,
|
||
AS_LPAREN,
|
||
AS_NOT,
|
||
AS_INTNUM,
|
||
AS_ID :
|
||
Begin
|
||
BuildConstSymbolExpression(false,false,false,value,asmsym,asmsymtyp);
|
||
if asmsym<>'' then
|
||
begin
|
||
if constsize<>sizeof(pint) then
|
||
Message1(asmr_w_const32bit_for_address,asmsym);
|
||
ConcatConstSymbol(curlist,asmsym,asmsymtyp,value)
|
||
end
|
||
else
|
||
ConcatConstant(curlist,value,constsize);
|
||
end;
|
||
AS_COMMA:
|
||
begin
|
||
Consume(AS_COMMA);
|
||
end;
|
||
AS_ALIGN,
|
||
AS_DB,
|
||
AS_DW,
|
||
AS_DD,
|
||
AS_DQ,
|
||
AS_OPCODE,
|
||
AS_END,
|
||
AS_SEPARATOR:
|
||
break;
|
||
else
|
||
begin
|
||
Message(asmr_e_syn_constant);
|
||
RecoverConsume(false);
|
||
end
|
||
end;
|
||
Until false;
|
||
end;
|
||
|
||
|
||
function tx86intreader.Assemble: tlinkedlist;
|
||
Var
|
||
hl : tasmlabel;
|
||
instr : Tx86Instruction;
|
||
Begin
|
||
Message1(asmr_d_start_reading,'intel');
|
||
inexpression:=FALSE;
|
||
firsttoken:=TRUE;
|
||
{ sets up all opcode and register tables in uppercase
|
||
done in the construtor now
|
||
if not _asmsorted then
|
||
Begin
|
||
SetupTables;
|
||
_asmsorted:=TRUE;
|
||
end;
|
||
}
|
||
curlist:=TAsmList.Create;
|
||
{ setup label linked list }
|
||
LocalLabelList:=TLocalLabelList.Create;
|
||
{ we might need to know which parameters are passed in registers }
|
||
current_procinfo.generate_parameter_info;
|
||
{ start tokenizer }
|
||
c:=current_scanner.asmgetcharstart;
|
||
gettoken;
|
||
{ main loop }
|
||
repeat
|
||
case actasmtoken of
|
||
AS_LLABEL:
|
||
Begin
|
||
if CreateLocalLabel(actasmpattern,hl,true) then
|
||
ConcatLabel(curlist,hl);
|
||
Consume(AS_LLABEL);
|
||
end;
|
||
|
||
AS_LABEL:
|
||
Begin
|
||
if SearchLabel(upper(actasmpattern),hl,true) then
|
||
ConcatLabel(curlist,hl)
|
||
else
|
||
Message1(asmr_e_unknown_label_identifier,actasmpattern);
|
||
Consume(AS_LABEL);
|
||
end;
|
||
|
||
AS_DW :
|
||
Begin
|
||
inexpression:=true;
|
||
Consume(AS_DW);
|
||
BuildConstant(2);
|
||
inexpression:=false;
|
||
end;
|
||
|
||
AS_DB :
|
||
Begin
|
||
inexpression:=true;
|
||
Consume(AS_DB);
|
||
BuildConstant(1);
|
||
inexpression:=false;
|
||
end;
|
||
|
||
AS_DD :
|
||
Begin
|
||
inexpression:=true;
|
||
Consume(AS_DD);
|
||
BuildConstant(4);
|
||
inexpression:=false;
|
||
end;
|
||
|
||
{$ifdef cpu64bitaddr}
|
||
AS_DQ:
|
||
Begin
|
||
inexpression:=true;
|
||
Consume(AS_DQ);
|
||
BuildConstant(8);
|
||
inexpression:=false;
|
||
end;
|
||
{$endif cpu64bitaddr}
|
||
|
||
AS_ALIGN:
|
||
Begin
|
||
Consume(AS_ALIGN);
|
||
ConcatAlign(curlist,BuildConstExpression);
|
||
if actasmtoken<>AS_SEPARATOR then
|
||
Consume(AS_SEPARATOR);
|
||
end;
|
||
|
||
AS_OPCODE :
|
||
Begin
|
||
instr:=Tx86Instruction.Create(Tx86Operand);
|
||
BuildOpcode(instr);
|
||
with instr do
|
||
begin
|
||
{ We need AT&T style operands }
|
||
Swapoperands;
|
||
{ Must be done with args in ATT order }
|
||
CheckNonCommutativeOpcodes;
|
||
AddReferenceSizes;
|
||
SetInstructionOpsize;
|
||
CheckOperandSizes;
|
||
ConcatInstruction(curlist);
|
||
end;
|
||
instr.Free;
|
||
end;
|
||
|
||
AS_SEPARATOR :
|
||
Begin
|
||
Consume(AS_SEPARATOR);
|
||
end;
|
||
|
||
AS_END :
|
||
break; { end assembly block }
|
||
|
||
else
|
||
Begin
|
||
Message(asmr_e_syntax_error);
|
||
RecoverConsume(false);
|
||
end;
|
||
end; { end case }
|
||
until false;
|
||
{ Check LocalLabelList }
|
||
LocalLabelList.CheckEmitted;
|
||
LocalLabelList.Free;
|
||
{ Return the list in an asmnode }
|
||
assemble:=curlist;
|
||
Message1(asmr_d_finish_reading,'intel');
|
||
end;
|
||
|
||
|
||
end.
|