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3078a1927f
* rename old ttype variables *type to *def * rename resulttypepass to pass_typecheck * rename pass_2 to pass_generate_code git-svn-id: trunk@5077 -
1535 lines
48 KiB
ObjectPascal
1535 lines
48 KiB
ObjectPascal
{
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Copyright (c) 1998-2002 by Carl Eric Codere and Peter Vreman
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Does the parsing for the GAS 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 raatt;
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{$i fpcdefs.inc}
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interface
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uses
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{ common }
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cutils,cclasses,
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{ global }
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globtype,
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{ aasm }
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cpubase,cpuinfo,aasmbase,aasmtai,aasmdata,aasmcpu,
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{ assembler reader }
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rabase,
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rasm,
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rautils,
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{ symtable }
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symconst,
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{ cg }
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cgbase;
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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_REALNUM,AS_COMMA,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,AS_DOLLAR,
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AS_HASH,AS_LSBRACKET,AS_RSBRACKET,AS_LBRACKET,AS_RBRACKET,
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{------------------ Assembler directives --------------------}
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AS_DB,AS_DW,AS_DD,AS_DQ,AS_GLOBAL,
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AS_ALIGN,AS_BALIGN,AS_P2ALIGN,AS_ASCII,
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AS_ASCIIZ,AS_LCOMM,AS_COMM,AS_SINGLE,AS_DOUBLE,AS_EXTENDED,
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AS_DATA,AS_TEXT,AS_END,
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{------------------ Assembler Operators --------------------}
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AS_TYPE,AS_SIZEOF,AS_MOD,AS_SHL,AS_SHR,AS_NOT,AS_AND,AS_OR,AS_XOR,AS_NOR,AS_AT,
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AS_LO,AS_HI);
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tasmkeyword = string[10];
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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_DB;
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lastdirective = AS_END;
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token2str : array[tasmtoken] of tasmkeyword=(
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'','Label','LLabel','string','integer',
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'float',',','(',
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')',':','.','+','-','*',
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';','identifier','register','opcode','/','$',
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'#','{','}','[',']',
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'.byte','.word','.long','.quad','.globl',
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'.align','.balign','.p2align','.ascii',
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'.asciz','.lcomm','.comm','.single','.double','.tfloat',
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'.data','.text','END',
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'TYPE','SIZEOF','%','<<','>>','!','&','|','^','~','@','lo','hi');
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type
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tattreader = class(tasmreader)
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actasmtoken : tasmtoken;
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prevasmtoken : tasmtoken;
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procedure SetupTables;
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procedure BuildConstant(constsize: byte);
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procedure BuildConstantOperand(oper : toperand);
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procedure BuildRealConstant(typ : tfloattype);
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procedure BuildStringConstant(asciiz: boolean);
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procedure BuildRecordOffsetSize(const expr: string;var offset:aint;var size:aint);
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procedure BuildConstSymbolExpression(allowref,betweenbracket,needofs:boolean;var value:aint;var asmsym:string;var asmsymtyp:TAsmsymtype);
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function BuildConstExpression(allowref,betweenbracket:boolean): aint;
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function Assemble: tlinkedlist;override;
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procedure handleopcode;virtual;abstract;
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function is_asmopcode(const s: string) : boolean;virtual;abstract;
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Function is_asmdirective(const s: string):boolean;
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function is_register(const s:string):boolean;virtual;
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function is_locallabel(const s: string):boolean;
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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 handlepercent;virtual;
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end;
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tcattreader = class of tattreader;
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var
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cattreader : tcattreader;
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implementation
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uses
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{ globals }
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verbose,systems,
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{ input }
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scanner,
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{ symtable }
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symbase,symtype,symsym,symtable,
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{$ifdef x86}
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rax86,
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{$endif x86}
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itcpugas,
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procinfo;
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procedure tattreader.SetupTables;
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{ creates uppercased symbol tables for speed access }
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var
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i : tasmop;
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str2opentry: tstr2opentry;
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Begin
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{ opcodes }
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iasmops:=TDictionary.Create;
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iasmops.delete_doubles:=true;
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for i:=firstop to lastop do
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begin
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str2opentry:=tstr2opentry.createname(upper(gas_op2str[i]));
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str2opentry.op:=i;
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iasmops.insert(str2opentry);
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end;
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end;
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function tattreader.is_asmdirective(const s: string):boolean;
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var
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i : tasmtoken;
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hs : string;
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Begin
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{ GNU as is also not casesensitive with this }
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hs:=lower(s);
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for i:=firstdirective to lastdirective do
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if hs=token2str[i] then
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begin
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actasmtoken:=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 tattreader.is_register(const s:string):boolean;
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begin
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is_register:=false;
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actasmregister:=gas_regnum_search(lower(s));
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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 tattreader.is_locallabel(const s: string):boolean;
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begin
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is_locallabel:=(length(s)>=2) and (s[1]='.') and (s[2]='L');
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end;
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procedure tattreader.handlepercent;
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begin
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c:=current_scanner.asmgetchar;
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actasmtoken:=AS_MOD;
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end;
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procedure tattreader.GetToken;
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var
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len : longint;
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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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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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{$ifdef arm}
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if not (c in [#10,#13,';']) then
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current_scanner.gettokenpos;
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{$else arm}
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if not (c in [#10,#13,'{',';']) then
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current_scanner.gettokenpos;
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{$endif arm}
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{ Local Label, Label, Directive, Prefix or Opcode }
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{$ifdef arm}
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if firsttoken and not(c in [#10,#13,';']) then
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{$else arm}
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if firsttoken and not(c in [#10,#13,'{',';']) then
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{$endif arm}
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begin
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firsttoken:=FALSE;
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len:=0;
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{ directive or local label }
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if c = '.' then
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begin
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inc(len);
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actasmpattern[len]:=c;
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{ Let us point to the next character }
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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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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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{ this is a local label... }
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if (c=':') and is_locallabel(actasmpattern) then
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Begin
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{ local variables are case sensitive }
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actasmtoken:=AS_LLABEL;
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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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{ must be a directive }
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else
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Begin
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{ directives are case sensitive!! }
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if is_asmdirective(actasmpattern) then
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exit;
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Message1(asmr_e_not_directive_or_local_symbol,actasmpattern);
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end;
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end;
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{ only opcodes and global labels are allowed now. }
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while c in ['A'..'Z','a'..'z','0'..'9','_'] do
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begin
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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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{ Label ? }
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if c = ':' then
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begin
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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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{$ifdef POWERPC}
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{ some PowerPC instructions can have the postfix -, + or .
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this code could be moved to is_asmopcode but I think
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it's better to ifdef it here (FK)
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}
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case c of
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'.', '-', '+':
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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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{$endif POWERPC}
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{$ifdef POWERPC64}
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{ some PowerPC instructions can have the postfix -, + or .
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this code could be moved to is_asmopcode but I think
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it's better to ifdef it here (FK)
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}
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case c of
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'.', '-', '+':
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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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{$endif POWERPC64}
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{ Opcode ? }
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If is_asmopcode(upper(actasmpattern)) then
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Begin
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uppervar(actasmpattern);
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exit;
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end;
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{ End of assemblerblock ? }
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if upper(actasmpattern) = 'END' then
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begin
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actasmtoken:=AS_END;
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exit;
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end;
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message1(asmr_e_unknown_opcode,actasmpattern);
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actasmtoken:=AS_NONE;
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end
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else { else firsttoken }
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{ Here we must handle all possible cases }
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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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{ - field of object/record }
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{ - directive. }
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begin
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if (prevasmtoken in [AS_ID,AS_RPAREN]) then
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begin
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c:=current_scanner.asmgetchar;
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actasmtoken:=AS_DOT;
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exit;
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end;
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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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if is_asmdirective(actasmpattern) then
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exit;
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{ local label references and directives }
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{ are case sensitive }
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actasmtoken:=AS_ID;
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exit;
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end;
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{ identifier, register, prefix or directive }
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'_','A'..'Z','a'..'z':
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begin
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len:=0;
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while c in ['A'..'Z','a'..'z','0'..'9','_','$'] do
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begin
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inc(len);
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actasmpattern[len]:=c;
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c:=current_scanner.asmgetchar;
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end;
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actasmpattern[0]:=chr(len);
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uppervar(actasmpattern);
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{$ifdef x86}
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{ only x86 architectures have instruction prefixes }
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{ Opcode, can only be when the previous was a prefix }
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If is_prefix(actopcode) and is_asmopcode(actasmpattern) then
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Begin
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uppervar(actasmpattern);
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exit;
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end;
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{$endif x86}
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{ check for end which is a reserved word unlike the opcodes }
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if actasmpattern = 'END' then
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Begin
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actasmtoken:=AS_END;
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exit;
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end;
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if actasmpattern = 'TYPE' then
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Begin
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actasmtoken:=AS_TYPE;
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exit;
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end;
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if actasmpattern = 'SIZEOF' then
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Begin
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actasmtoken:=AS_SIZEOF;
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exit;
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end;
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if is_register(actasmpattern) then
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begin
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actasmtoken:=AS_REGISTER;
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exit;
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end;
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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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searchsym(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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actasmpattern:=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 + upcase(c);
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c:=current_scanner.asmgetchar;
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end;
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end;
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end;
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actasmtoken:=AS_ID;
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exit;
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end;
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'%' : { register or modulo }
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handlepercent;
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'1'..'9': { integer number }
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begin
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len:=0;
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while c in ['0'..'9'] do
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Begin
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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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actasmpattern:=tostr(ParseVal(actasmpattern,10));
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actasmtoken:=AS_INTNUM;
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exit;
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end;
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'0' : { octal,hexa,real or binary number. }
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begin
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actasmpattern:=c;
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c:=current_scanner.asmgetchar;
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case upcase(c) of
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'B': { binary }
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Begin
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c:=current_scanner.asmgetchar;
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while c in ['0','1'] 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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actasmpattern:=tostr(ParseVal(actasmpattern,2));
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actasmtoken:=AS_INTNUM;
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exit;
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end;
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'D': { real }
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Begin
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c:=current_scanner.asmgetchar;
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{ get ridd of the 0d }
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if (c in ['+','-']) then
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begin
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actasmpattern:=c;
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c:=current_scanner.asmgetchar;
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end
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else
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actasmpattern:='';
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while c in ['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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if 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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while c in ['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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if upcase(c) = 'E' 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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if (c in ['+','-']) 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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end;
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while c in ['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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end;
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actasmtoken:=AS_REALNUM;
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exit;
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end
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else
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begin
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Message1(asmr_e_invalid_float_const,actasmpattern+c);
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actasmtoken:=AS_NONE;
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end;
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end;
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'X': { hexadecimal }
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|
Begin
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c:=current_scanner.asmgetchar;
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while c in ['0'..'9','a'..'f','A'..'F'] 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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actasmpattern:=tostr(ParseVal(actasmpattern,16));
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actasmtoken:=AS_INTNUM;
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exit;
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end;
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'1'..'7': { octal }
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begin
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actasmpattern:=actasmpattern + c;
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while c in ['0'..'7'] 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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actasmpattern:=tostr(ParseVal(actasmpattern,8));
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actasmtoken:=AS_INTNUM;
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exit;
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|
end;
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else { octal number zero value...}
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|
Begin
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|
actasmpattern:=tostr(ParseVal(actasmpattern,8));
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actasmtoken:=AS_INTNUM;
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exit;
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|
end;
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end; { end case }
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end;
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'&' :
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begin
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c:=current_scanner.asmgetchar;
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actasmtoken:=AS_AND;
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end;
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|
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'''' : { char }
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begin
|
|
current_scanner.in_asm_string:=true;
|
|
actasmpattern:='';
|
|
repeat
|
|
c:=current_scanner.asmgetchar;
|
|
case c of
|
|
'\' :
|
|
begin
|
|
{ copy also the next char so \" is parsed correctly }
|
|
actasmpattern:=actasmpattern+c;
|
|
c:=current_scanner.asmgetchar;
|
|
actasmpattern:=actasmpattern+c;
|
|
end;
|
|
'''' :
|
|
begin
|
|
c:=current_scanner.asmgetchar;
|
|
break;
|
|
end;
|
|
#10,#13:
|
|
Message(scan_f_string_exceeds_line);
|
|
else
|
|
actasmpattern:=actasmpattern+c;
|
|
end;
|
|
until false;
|
|
actasmpattern:=EscapeToPascal(actasmpattern);
|
|
actasmtoken:=AS_STRING;
|
|
current_scanner.in_asm_string:=false;
|
|
exit;
|
|
end;
|
|
|
|
'"' : { string }
|
|
begin
|
|
current_scanner.in_asm_string:=true;
|
|
actasmpattern:='';
|
|
repeat
|
|
c:=current_scanner.asmgetchar;
|
|
case c of
|
|
'\' :
|
|
begin
|
|
{ copy also the next char so \" is parsed correctly }
|
|
actasmpattern:=actasmpattern+c;
|
|
c:=current_scanner.asmgetchar;
|
|
actasmpattern:=actasmpattern+c;
|
|
end;
|
|
'"' :
|
|
begin
|
|
c:=current_scanner.asmgetchar;
|
|
break;
|
|
end;
|
|
#10,#13:
|
|
Message(scan_f_string_exceeds_line);
|
|
else
|
|
actasmpattern:=actasmpattern+c;
|
|
end;
|
|
until false;
|
|
actasmpattern:=EscapeToPascal(actasmpattern);
|
|
actasmtoken:=AS_STRING;
|
|
current_scanner.in_asm_string:=false;
|
|
exit;
|
|
end;
|
|
|
|
'$' :
|
|
begin
|
|
actasmtoken:=AS_DOLLAR;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'#' :
|
|
begin
|
|
actasmtoken:=AS_HASH;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'[' :
|
|
begin
|
|
actasmtoken:=AS_LBRACKET;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
']' :
|
|
begin
|
|
actasmtoken:=AS_RBRACKET;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
{$ifdef arm}
|
|
// the arm assembler uses { ... } for register sets
|
|
'{' :
|
|
begin
|
|
actasmtoken:=AS_LSBRACKET;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'}' :
|
|
begin
|
|
actasmtoken:=AS_RSBRACKET;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
{$endif arm}
|
|
|
|
',' :
|
|
begin
|
|
actasmtoken:=AS_COMMA;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'<' :
|
|
begin
|
|
actasmtoken:=AS_SHL;
|
|
c:=current_scanner.asmgetchar;
|
|
if c = '<' then
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'>' :
|
|
begin
|
|
actasmtoken:=AS_SHL;
|
|
c:=current_scanner.asmgetchar;
|
|
if c = '>' then
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'|' :
|
|
begin
|
|
actasmtoken:=AS_OR;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'^' :
|
|
begin
|
|
actasmtoken:=AS_XOR;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
|
|
'(' :
|
|
begin
|
|
actasmtoken:=AS_LPAREN;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
')' :
|
|
begin
|
|
actasmtoken:=AS_RPAREN;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
':' :
|
|
begin
|
|
actasmtoken:=AS_COLON;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'+' :
|
|
begin
|
|
actasmtoken:=AS_PLUS;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'-' :
|
|
begin
|
|
actasmtoken:=AS_MINUS;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'*' :
|
|
begin
|
|
actasmtoken:=AS_STAR;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'/' :
|
|
begin
|
|
actasmtoken:=AS_SLASH;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'!' :
|
|
begin
|
|
actasmtoken:=AS_NOT;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
'@' :
|
|
begin
|
|
actasmtoken:=AS_AT;
|
|
c:=current_scanner.asmgetchar;
|
|
exit;
|
|
end;
|
|
|
|
{$ifndef arm}
|
|
'{',
|
|
{$endif arm}
|
|
#13,#10,';' :
|
|
begin
|
|
{ the comment is read by asmgetchar }
|
|
c:=current_scanner.asmgetchar;
|
|
firsttoken:=TRUE;
|
|
actasmtoken:=AS_SEPARATOR;
|
|
exit;
|
|
end;
|
|
|
|
else
|
|
current_scanner.illegal_char(c);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
function tattreader.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 tattreader.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;
|
|
|
|
|
|
Procedure tattreader.BuildConstant(constsize: byte);
|
|
var
|
|
asmsymtyp : TAsmSymType;
|
|
asmsym,
|
|
expr: string;
|
|
value : aint;
|
|
Begin
|
|
Repeat
|
|
Case actasmtoken of
|
|
AS_STRING:
|
|
Begin
|
|
expr:=actasmpattern;
|
|
if length(expr) > 1 then
|
|
Message(asmr_e_string_not_allowed_as_const);
|
|
Consume(AS_STRING);
|
|
Case actasmtoken of
|
|
AS_COMMA: Consume(AS_COMMA);
|
|
AS_END,
|
|
AS_SEPARATOR: ;
|
|
else
|
|
Message(asmr_e_invalid_string_expression);
|
|
end; { end case }
|
|
ConcatString(curlist,expr);
|
|
end;
|
|
AS_INTNUM,
|
|
AS_PLUS,
|
|
AS_MINUS,
|
|
AS_LPAREN,
|
|
AS_TYPE,
|
|
AS_SIZEOF,
|
|
AS_NOT,
|
|
AS_ID :
|
|
Begin
|
|
BuildConstSymbolExpression(false,false,false,value,asmsym,asmsymtyp);
|
|
if asmsym<>'' then
|
|
begin
|
|
if constsize<>sizeof(aint) then
|
|
Message(asmr_w_32bit_const_for_address);
|
|
ConcatConstSymbol(curlist,asmsym,asmsymtyp,value)
|
|
end
|
|
else
|
|
ConcatConstant(curlist,value,constsize);
|
|
end;
|
|
AS_COMMA:
|
|
Consume(AS_COMMA);
|
|
AS_END,
|
|
AS_SEPARATOR:
|
|
break;
|
|
else
|
|
begin
|
|
Message(asmr_e_syn_constant);
|
|
RecoverConsume(false);
|
|
end
|
|
end; { end case }
|
|
Until false;
|
|
end;
|
|
|
|
|
|
Procedure tattreader.BuildRealConstant(typ : tfloattype);
|
|
var
|
|
expr : string;
|
|
r : bestreal;
|
|
code : integer;
|
|
negativ : boolean;
|
|
errorflag: boolean;
|
|
Begin
|
|
errorflag:=FALSE;
|
|
Repeat
|
|
negativ:=false;
|
|
expr:='';
|
|
if actasmtoken=AS_PLUS then
|
|
Consume(AS_PLUS)
|
|
else
|
|
if actasmtoken=AS_MINUS then
|
|
begin
|
|
negativ:=true;
|
|
consume(AS_MINUS);
|
|
end;
|
|
Case actasmtoken of
|
|
AS_INTNUM:
|
|
Begin
|
|
expr:=actasmpattern;
|
|
Consume(AS_INTNUM);
|
|
if negativ then
|
|
expr:='-'+expr;
|
|
val(expr,r,code);
|
|
if code<>0 then
|
|
Begin
|
|
r:=0;
|
|
Message(asmr_e_invalid_float_expr);
|
|
End;
|
|
ConcatRealConstant(curlist,r,typ);
|
|
end;
|
|
AS_REALNUM:
|
|
Begin
|
|
expr:=actasmpattern;
|
|
Consume(AS_REALNUM);
|
|
{ in ATT syntax you have 0d in front of the real }
|
|
{ should this be forced ? yes i think so, as to }
|
|
{ conform to gas as much as possible. }
|
|
if (expr[1]='0') and (upper(expr[2])='D') then
|
|
Delete(expr,1,2);
|
|
if negativ then
|
|
expr:='-'+expr;
|
|
val(expr,r,code);
|
|
if code<>0 then
|
|
Begin
|
|
r:=0;
|
|
Message(asmr_e_invalid_float_expr);
|
|
End;
|
|
ConcatRealConstant(curlist,r,typ);
|
|
end;
|
|
AS_COMMA:
|
|
begin
|
|
Consume(AS_COMMA);
|
|
end;
|
|
AS_END,
|
|
AS_SEPARATOR:
|
|
begin
|
|
break;
|
|
end;
|
|
else
|
|
Begin
|
|
Consume(actasmtoken);
|
|
if not errorflag then
|
|
Message(asmr_e_invalid_float_expr);
|
|
errorflag:=TRUE;
|
|
end;
|
|
end;
|
|
Until false;
|
|
end;
|
|
|
|
|
|
Procedure tattreader.BuildStringConstant(asciiz: boolean);
|
|
var
|
|
expr: string;
|
|
errorflag : boolean;
|
|
Begin
|
|
errorflag:=FALSE;
|
|
Repeat
|
|
Case actasmtoken of
|
|
AS_STRING:
|
|
Begin
|
|
expr:=actasmpattern;
|
|
if asciiz then
|
|
expr:=expr+#0;
|
|
ConcatPasString(curlist,expr);
|
|
Consume(AS_STRING);
|
|
end;
|
|
AS_COMMA:
|
|
begin
|
|
Consume(AS_COMMA);
|
|
end;
|
|
AS_END,
|
|
AS_SEPARATOR:
|
|
begin
|
|
break;
|
|
end;
|
|
else
|
|
Begin
|
|
Consume(actasmtoken);
|
|
if not errorflag then
|
|
Message(asmr_e_invalid_string_expression);
|
|
errorflag:=TRUE;
|
|
end;
|
|
end;
|
|
Until false;
|
|
end;
|
|
|
|
|
|
Function tattreader.Assemble: tlinkedlist;
|
|
Var
|
|
hl : tasmlabel;
|
|
commname : string;
|
|
lasTSec : TAsmSectiontype;
|
|
l1,l2 : longint;
|
|
Begin
|
|
Message1(asmr_d_start_reading,'GNU AS');
|
|
firsttoken:=TRUE;
|
|
{ sets up all opcode and register tables in uppercase }
|
|
if not _asmsorted then
|
|
Begin
|
|
SetupTables;
|
|
_asmsorted:=TRUE;
|
|
end;
|
|
curlist:=TAsmList.Create;
|
|
lasTSec:=sec_code;
|
|
{ setup label linked list }
|
|
LocalLabelList:=TLocalLabelList.Create;
|
|
{ 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
|
|
Consume(AS_DW);
|
|
BuildConstant(2);
|
|
end;
|
|
|
|
AS_DATA:
|
|
Begin
|
|
new_section(curList,sec_data,lower(current_procinfo.procdef.mangledname),0);
|
|
lasTSec:=sec_data;
|
|
Consume(AS_DATA);
|
|
end;
|
|
|
|
AS_TEXT:
|
|
Begin
|
|
new_section(curList,sec_code,lower(current_procinfo.procdef.mangledname),0);
|
|
lasTSec:=sec_code;
|
|
Consume(AS_TEXT);
|
|
end;
|
|
|
|
AS_DB:
|
|
Begin
|
|
Consume(AS_DB);
|
|
BuildConstant(1);
|
|
end;
|
|
|
|
AS_DD:
|
|
Begin
|
|
Consume(AS_DD);
|
|
BuildConstant(4);
|
|
end;
|
|
|
|
AS_DQ:
|
|
Begin
|
|
Consume(AS_DQ);
|
|
{$ifdef cpu64bit}
|
|
BuildConstant(8);
|
|
{$else cpu64bit}
|
|
BuildRealConstant(s64comp);
|
|
{$endif cpu64bit}
|
|
end;
|
|
|
|
AS_SINGLE:
|
|
Begin
|
|
Consume(AS_SINGLE);
|
|
BuildRealConstant(s32real);
|
|
end;
|
|
|
|
AS_DOUBLE:
|
|
Begin
|
|
Consume(AS_DOUBLE);
|
|
BuildRealConstant(s64real);
|
|
end;
|
|
|
|
AS_EXTENDED:
|
|
Begin
|
|
Consume(AS_EXTENDED);
|
|
BuildRealConstant(s80real);
|
|
end;
|
|
|
|
AS_GLOBAL:
|
|
Begin
|
|
Consume(AS_GLOBAL);
|
|
if actasmtoken=AS_ID then
|
|
ConcatPublic(curlist,actasmpattern);
|
|
Consume(AS_ID);
|
|
if actasmtoken<>AS_SEPARATOR then
|
|
Consume(AS_SEPARATOR);
|
|
end;
|
|
|
|
AS_ALIGN:
|
|
Begin
|
|
Consume(AS_ALIGN);
|
|
l1:=BuildConstExpression(false,false);
|
|
if (target_info.system in [system_i386_GO32V2]) then
|
|
begin
|
|
l2:=1;
|
|
if (l1>=0) and (l1<=16) then
|
|
while (l1>0) do
|
|
begin
|
|
l2:=2*l2;
|
|
dec(l1);
|
|
end;
|
|
l1:=l2;
|
|
end;
|
|
ConcatAlign(curlist,l1);
|
|
Message(asmr_n_align_is_target_specific);
|
|
if actasmtoken<>AS_SEPARATOR then
|
|
Consume(AS_SEPARATOR);
|
|
end;
|
|
|
|
AS_BALIGN:
|
|
Begin
|
|
Consume(AS_BALIGN);
|
|
ConcatAlign(curlist,BuildConstExpression(false,false));
|
|
if actasmtoken<>AS_SEPARATOR then
|
|
Consume(AS_SEPARATOR);
|
|
end;
|
|
|
|
AS_P2ALIGN:
|
|
Begin
|
|
Consume(AS_P2ALIGN);
|
|
l1:=BuildConstExpression(false,false);
|
|
l2:=1;
|
|
if (l1>=0) and (l1<=16) then
|
|
while (l1>0) do
|
|
begin
|
|
l2:=2*l2;
|
|
dec(l1);
|
|
end;
|
|
l1:=l2;
|
|
ConcatAlign(curlist,l1);
|
|
if actasmtoken<>AS_SEPARATOR then
|
|
Consume(AS_SEPARATOR);
|
|
end;
|
|
|
|
AS_ASCIIZ:
|
|
Begin
|
|
Consume(AS_ASCIIZ);
|
|
BuildStringConstant(TRUE);
|
|
end;
|
|
|
|
AS_ASCII:
|
|
Begin
|
|
Consume(AS_ASCII);
|
|
BuildStringConstant(FALSE);
|
|
end;
|
|
|
|
AS_LCOMM:
|
|
Begin
|
|
Consume(AS_LCOMM);
|
|
commname:=actasmpattern;
|
|
Consume(AS_ID);
|
|
Consume(AS_COMMA);
|
|
curList.concat(Tai_datablock.Create(commname,BuildConstExpression(false,false)));
|
|
if actasmtoken<>AS_SEPARATOR then
|
|
Consume(AS_SEPARATOR);
|
|
end;
|
|
|
|
AS_COMM:
|
|
Begin
|
|
Consume(AS_COMM);
|
|
commname:=actasmpattern;
|
|
Consume(AS_ID);
|
|
Consume(AS_COMMA);
|
|
curList.concat(Tai_datablock.Create_global(commname,BuildConstExpression(false,false)));
|
|
if actasmtoken<>AS_SEPARATOR then
|
|
Consume(AS_SEPARATOR);
|
|
end;
|
|
|
|
AS_OPCODE:
|
|
Begin
|
|
HandleOpCode;
|
|
end;
|
|
|
|
AS_SEPARATOR:
|
|
Begin
|
|
Consume(AS_SEPARATOR);
|
|
end;
|
|
|
|
AS_END:
|
|
begin
|
|
break; { end assembly block }
|
|
end;
|
|
|
|
else
|
|
Begin
|
|
Message(asmr_e_syntax_error);
|
|
RecoverConsume(false);
|
|
end;
|
|
end;
|
|
until false;
|
|
{ Check LocalLabelList }
|
|
LocalLabelList.CheckEmitted;
|
|
LocalLabelList.Free;
|
|
{ are we back in the code section? }
|
|
if lasTSec<>sec_code then
|
|
begin
|
|
Message(asmr_w_assembler_code_not_returned_to_text);
|
|
new_section(curList,sec_code,lower(current_procinfo.procdef.mangledname),0);
|
|
end;
|
|
{ Return the list in an asmnode }
|
|
assemble:=curlist;
|
|
Message1(asmr_d_finish_reading,'GNU AS');
|
|
end;
|
|
|
|
|
|
{*****************************************************************************
|
|
Parsing Helpers
|
|
*****************************************************************************}
|
|
|
|
Procedure tattreader.BuildRecordOffsetSize(const expr: string;var offset:aint;var size:aint);
|
|
{ Description: This routine builds up a record offset after a AS_DOT }
|
|
{ token is encountered. }
|
|
{ On entry actasmtoken should be equal to AS_DOT }
|
|
var
|
|
s : string;
|
|
Begin
|
|
offset:=0;
|
|
size:=0;
|
|
s:=expr;
|
|
while (actasmtoken=AS_DOT) do
|
|
begin
|
|
Consume(AS_DOT);
|
|
if actasmtoken=AS_ID then
|
|
s:=s+'.'+actasmpattern;
|
|
if not Consume(AS_ID) then
|
|
begin
|
|
RecoverConsume(true);
|
|
break;
|
|
end;
|
|
end;
|
|
if not GetRecordOffsetSize(s,offset,size) then
|
|
Message(asmr_e_building_record_offset);
|
|
end;
|
|
|
|
|
|
procedure tattreader.BuildConstSymbolExpression(allowref,betweenbracket,needofs:boolean;var value:aint;var asmsym:string;var asmsymtyp:TAsmsymtype);
|
|
var
|
|
hssymtyp : TAsmSymType;
|
|
hs,tempstr,expr : string;
|
|
parenlevel : longint;
|
|
l,k : aint;
|
|
errorflag : boolean;
|
|
prevtok : tasmtoken;
|
|
sym : tsym;
|
|
srsymtable : tsymtable;
|
|
hl : tasmlabel;
|
|
Begin
|
|
asmsym:='';
|
|
asmsymtyp:=AT_DATA;
|
|
value:=0;
|
|
errorflag:=FALSE;
|
|
tempstr:='';
|
|
expr:='';
|
|
parenlevel:=0;
|
|
Repeat
|
|
Case actasmtoken of
|
|
AS_LPAREN:
|
|
Begin
|
|
{ Exit if ref? }
|
|
if allowref and (prevasmtoken in [AS_INTNUM,AS_ID]) then
|
|
break;
|
|
Consume(AS_LPAREN);
|
|
expr:=expr + '(';
|
|
inc(parenlevel);
|
|
end;
|
|
AS_RBRACKET:
|
|
begin
|
|
if betweenbracket then
|
|
break;
|
|
{ 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;
|
|
AS_RPAREN:
|
|
Begin
|
|
{ end of ref ? }
|
|
if (parenlevel=0) and betweenbracket 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);
|
|
expr:=expr + '*';
|
|
end;
|
|
AS_PLUS:
|
|
Begin
|
|
Consume(AS_PLUS);
|
|
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_DOLLAR:
|
|
begin
|
|
Consume(AS_DOLLAR);
|
|
if actasmtoken<>AS_ID then
|
|
Message(asmr_e_dollar_without_identifier);
|
|
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_SIZEOF,
|
|
AS_TYPE:
|
|
begin
|
|
l:=0;
|
|
Consume(actasmtoken);
|
|
if actasmtoken<>AS_ID then
|
|
Message(asmr_e_type_without_identifier)
|
|
else
|
|
begin
|
|
tempstr:=actasmpattern;
|
|
Consume(AS_ID);
|
|
if actasmtoken=AS_DOT then
|
|
BuildRecordOffsetSize(tempstr,k,l)
|
|
else
|
|
begin
|
|
searchsym(tempstr,sym,srsymtable);
|
|
if assigned(sym) then
|
|
begin
|
|
case sym.typ of
|
|
globalvarsym,
|
|
localvarsym,
|
|
paravarsym :
|
|
l:=tabstractvarsym(sym).getsize;
|
|
typedconstsym :
|
|
l:=ttypedconstsym(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;
|
|
end;
|
|
AS_ID:
|
|
Begin
|
|
hs:='';
|
|
hssymtyp:=AT_DATA;
|
|
tempstr:=actasmpattern;
|
|
prevtok:=prevasmtoken;
|
|
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_LABEL;
|
|
end
|
|
else
|
|
if SearchLabel(tempstr,hl,false) then
|
|
begin
|
|
hs:=hl.name;
|
|
hssymtyp:=AT_FUNCTION;
|
|
end
|
|
else
|
|
begin
|
|
searchsym(tempstr,sym,srsymtable);
|
|
if assigned(sym) then
|
|
begin
|
|
case sym.typ of
|
|
globalvarsym :
|
|
hs:=tglobalvarsym(sym).mangledname;
|
|
localvarsym,
|
|
paravarsym :
|
|
Message(asmr_e_no_local_or_para_allowed);
|
|
typedconstsym :
|
|
hs:=ttypedconstsym(sym).mangledname;
|
|
procsym :
|
|
with Tprocsym(sym) do
|
|
begin
|
|
if procdef_count>1 then
|
|
message(asmr_w_calling_overload_func);
|
|
hs:=first_procdef.mangledname;
|
|
hssymtyp:=AT_FUNCTION;
|
|
end;
|
|
typesym :
|
|
begin
|
|
if not(ttypesym(sym).typedef.deftype in [recorddef,objectdef]) then
|
|
Message(asmr_e_wrong_sym_type);
|
|
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 needofs and (prevtok<>AS_DOLLAR) then
|
|
Message(asmr_e_need_dollar);
|
|
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
|
|
Message(asmr_e_only_add_relocatable_symbol);
|
|
end;
|
|
if actasmtoken=AS_DOT then
|
|
begin
|
|
BuildRecordOffsetSize(tempstr,l,k);
|
|
str(l, tempstr);
|
|
expr:=expr + tempstr;
|
|
end
|
|
else
|
|
begin
|
|
if (expr='') or (expr[length(expr)] in ['+','-','/','*']) then
|
|
delete(expr,length(expr),1);
|
|
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_LPAREN,AS_RPAREN,AS_RBRACKET,AS_END]) then
|
|
Message(asmr_e_only_add_relocatable_symbol);
|
|
end;
|
|
AS_END,
|
|
AS_SEPARATOR,
|
|
AS_COMMA:
|
|
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;
|
|
end;
|
|
|
|
|
|
function tattreader.BuildConstExpression(allowref,betweenbracket:boolean): aint;
|
|
var
|
|
l : aint;
|
|
hs : string;
|
|
hssymtyp : TAsmSymType;
|
|
begin
|
|
BuildConstSymbolExpression(allowref,betweenbracket,false,l,hs,hssymtyp);
|
|
if hs<>'' then
|
|
Message(asmr_e_relocatable_symbol_not_allowed);
|
|
BuildConstExpression:=l;
|
|
end;
|
|
|
|
|
|
Procedure tattreader.BuildConstantOperand(oper : toperand);
|
|
var
|
|
l : aint;
|
|
tempstr : string;
|
|
tempsymtyp : TAsmSymType;
|
|
begin
|
|
BuildConstSymbolExpression(false,false,true,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
|
|
begin
|
|
oper.opr.typ:=OPR_CONSTANT;
|
|
oper.opr.val:=l;
|
|
end;
|
|
end;
|
|
|
|
end.
|