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bfed29ff8b
fpc/compiler/ra386att.pas
peter bfed29ff8b * NEWLAB for label as symbol
1999-05-21 13:54:38 +00:00

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{
$Id$
Copyright (c) 1997-99 by Carl Eric Codere and Peter Vreman
Does the parsing for the AT&T styled inline assembler.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
{$ifdef TP}
{$N+,E+}
{$endif TP}
Unit Ra386att;
Interface
uses
tree;
function assemble: ptree;
Implementation
Uses
globtype,
strings,cobjects,systems,verbose,globals,
files,aasm,types,symtable,scanner,hcodegen
,i386base
,rautils,ra386;
type
tasmtoken = (
AS_NONE,AS_LABEL,AS_LLABEL,AS_STRING,AS_INTNUM,
AS_REALNUM,AS_COMMA,AS_LPAREN,
AS_RPAREN,AS_COLON,AS_DOT,AS_PLUS,AS_MINUS,AS_STAR,
AS_SEPARATOR,AS_ID,AS_REGISTER,AS_OPCODE,AS_SLASH,AS_DOLLAR,
{------------------ Assembler directives --------------------}
AS_DB,AS_DW,AS_DD,AS_DQ,AS_GLOBAL,AS_ALIGN,AS_ASCII,
AS_ASCIIZ,AS_LCOMM,AS_COMM,AS_SINGLE,AS_DOUBLE,AS_EXTENDED,
AS_DATA,AS_TEXT,AS_END,
{------------------ Assembler Operators --------------------}
AS_MOD,AS_SHL,AS_SHR,AS_NOT,AS_AND,AS_OR,AS_XOR,AS_NOR);
tasmkeyword = string[8];
const
{ These tokens should be modified accordingly to the modifications }
{ in the different enumerations. }
firstdirective = AS_DB;
lastdirective = AS_END;
_count_asmprefixes = 5;
_count_asmspecialops = 25;
_count_asmoverrides = 3;
token2str : array[tasmtoken] of string[10]=(
'','Label','LLabel','string','integer',
'float',',','(',
')',':','.','+','-','*',
';','identifier','register','opcode','/','$',
'.byte','.word','.long','.quad','.globl','.align','.ascii',
'.asciz','.lcomm','.comm','.single','.double','.tfloat',
'.data','.text','END',
'%','<<','>>','!','&','|','^','~');
const
newline = #10;
firsttoken : boolean = TRUE;
operandnum : byte = 0;
charcount : byte = 0;
var
_asmsorted,
inexpression : boolean;
curlist : paasmoutput;
c : char;
actasmtoken : tasmtoken;
prevasmtoken : tasmtoken;
actasmpattern : string;
actopcode : tasmop;
actasmregister : tregister;
actopsize : topsize;
actcondition : tasmcond;
Instr : TInstruction;
labellist : TAsmLabelList;
iasmops : ^op2strtable;
iasmregs : ^reg2strtable;
Procedure SetupTables;
{ creates uppercased symbol tables for speed access }
var
i : tasmop;
j : tregister;
Begin
{ opcodes }
new(iasmops);
for i:=firstop to lastop do
iasmops^[i] := upper(att_op2str[i]);
{ registers }
new(iasmregs);
for j:=firstreg to lastreg do
iasmregs^[j] := upper(att_reg2str[j]);
end;
{---------------------------------------------------------------------}
{ Routines for the tokenizing }
{---------------------------------------------------------------------}
function is_asmopcode(const s: string):boolean;
const
att_sizesuffixstr : array[0..8] of string[2] = (
'','B','W','L','BW','BL','WL','Q','T'
);
att_sizesuffix : array[0..8] of topsize = (
S_NO,S_B,S_W,S_L,S_BW,S_BL,S_WL,S_IQ,S_FX
);
var
i : tasmop;
cond : string[4];
cnd : tasmcond;
len,
j,
sufidx : longint;
hid : string;
Begin
is_asmopcode:=FALSE;
actopcode:=A_None;
actcondition:=C_None;
actopsize:=S_NO;
{ search for all possible suffixes }
for sufidx:=low(att_sizesuffixstr) to high(att_sizesuffixstr) do
begin
len:=length(s)-length(att_sizesuffixstr[sufidx]);
if copy(s,len+1,length(att_sizesuffixstr[sufidx]))=att_sizesuffixstr[sufidx] then
begin
{ here we search the entire table... }
hid:=copy(s,1,len);
for i:=firstop to lastop do
if (length(hid) > 0) and (hid=iasmops^[i]) then
begin
actopsize:=att_sizesuffix[sufidx];
actopcode:=i;
actasmtoken:=AS_OPCODE;
is_asmopcode:=TRUE;
exit;
end;
{ not found, check condition opcodes }
j:=0;
while (j<CondAsmOps) do
begin
if Copy(s,1,Length(CondAsmOpStr[j]))=CondAsmOpStr[j] then
begin
cond:=Copy(s,Length(CondAsmOpStr[j])+1,len-Length(CondAsmOpStr[j]));
if cond<>'' then
begin
for cnd:=low(TasmCond) to high(TasmCond) do
if Cond=Upper(cond2str[cnd]) then
begin
actopcode:=CondASmOp[j];
actopsize:=att_sizesuffix[sufidx];
actcondition:=cnd;
actasmtoken:=AS_OPCODE;
is_asmopcode:=TRUE;
exit;
end;
end;
end;
inc(j);
end;
end;
end;
end;
Function is_asmdirective(const s: string):boolean;
var
i : tasmtoken;
Begin
for i:=firstdirective to lastdirective do
if s=token2str[i] then
begin
actasmtoken:=i;
is_asmdirective:=true;
exit;
end;
is_asmdirective:=false;
end;
Function is_register(const s: string):boolean;
Var
i : tregister;
Begin
actasmregister:=R_NO;
for i:=firstreg to lastreg do
if s=iasmregs^[i] then
begin
actasmtoken:=AS_REGISTER;
actasmregister:=i;
is_register:=true;
exit;
end;
is_register:=false;
end;
Procedure GetToken;
{*********************************************************************}
{ FUNCTION GetToken: tasmtoken; }
{ Description: This routine returns intel assembler tokens and }
{ does some minor syntax error checking. }
{*********************************************************************}
var
forcelabel: boolean;
errorflag : boolean;
len : longint;
begin
{ save old token and reset new token }
prevasmtoken:=actasmtoken;
actasmtoken:=AS_NONE;
{ reset }
errorflag:=FALSE;
forcelabel:=FALSE;
actasmpattern:='';
{ while space and tab , continue scan... }
while c in [' ',#9] do
c:=current_scanner^.asmgetchar;
{ get token pos }
if not (c in [newline,#13,'{',';']) then
current_scanner^.gettokenpos;
{ Local Label, Label, Directive, Prefix or Opcode }
if firsttoken and not(c in [newline,#13,'{',';']) then
begin
firsttoken:=FALSE;
len:=0;
{ directive or local label }
if c = '.' then
begin
inc(len);
actasmpattern[len]:=c;
{ Let us point to the next character }
c:=current_scanner^.asmgetchar;
while c in ['A'..'Z','a'..'z','0'..'9','_','$'] do
begin
inc(len);
actasmpattern[len]:=c;
c:=current_scanner^.asmgetchar;
end;
actasmpattern[0]:=chr(len);
{ this is a local label... }
if (actasmpattern[2] = 'L') and (c = ':') then
Begin
{ local variables are case sensitive }
actasmtoken:=AS_LLABEL;
{ delete .L }
delete(actasmpattern,1,2);
{ point to next character ... }
c:=current_scanner^.asmgetchar;
exit;
end
{ must be a directive }
else
Begin
{ directives are case sensitive!! }
if is_asmdirective(actasmpattern) then
exit;
Message1(asmr_e_not_directive_or_local_symbol,actasmpattern);
end;
end;
{ only opcodes and global labels are allowed now. }
while c in ['A'..'Z','a'..'z','0'..'9','_'] do
begin
inc(len);
actasmpattern[len]:=c;
c:=current_scanner^.asmgetchar;
end;
actasmpattern[0]:=chr(len);
{ Label ? }
if c = ':' then
begin
actasmtoken:=AS_LABEL;
{ let us point to the next character }
c:=current_scanner^.asmgetchar;
exit;
end;
{ Opcode ? }
If is_asmopcode(upper(actasmpattern)) then
Begin
uppervar(actasmpattern);
exit;
end;
{ End of assemblerblock ? }
if upper(actasmpattern) = 'END' then
begin
actasmtoken:=AS_END;
exit;
end;
actasmtoken:=AS_NONE;
end
else { else firsttoken }
{ Here we must handle all possible cases }
begin
case c of
'.' : { possiblities : - local label reference , such as in jmp @local1 }
{ - field of object/record }
{ - directive. }
begin
if (prevasmtoken=AS_ID) then
begin
c:=current_scanner^.asmgetchar;
actasmtoken:=AS_DOT;
exit;
end;
actasmpattern:=c;
c:=current_scanner^.asmgetchar;
while c in ['A'..'Z','a'..'z','0'..'9','_','$'] do
begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar;
end;
if is_asmdirective(actasmpattern) then
exit;
{ local label references and directives }
{ are case sensitive }
actasmtoken:=AS_ID;
exit;
end;
{ identifier, register, prefix or directive }
'_','A'..'Z','a'..'z':
begin
len:=0;
while c in ['A'..'Z','a'..'z','0'..'9','_','$'] do
begin
inc(len);
actasmpattern[len]:=c;
c:=current_scanner^.asmgetchar;
end;
actasmpattern[0]:=chr(len);
uppervar(actasmpattern);
{ Opcode, can only be when the previous was a prefix }
If (OperandNum=0) and is_asmopcode(upper(actasmpattern)) then
Begin
uppervar(actasmpattern);
exit;
end;
{ check for end which is a reserved word unlike the opcodes }
if actasmpattern = 'END' then
Begin
actasmtoken:=AS_END;
exit;
end;
actasmtoken:=AS_ID;
exit;
end;
'%' : { register or modulo }
begin
len:=1;
actasmpattern[len]:='%';
c:=current_scanner^.asmgetchar;
while c in ['a'..'z','A'..'Z','0'..'9'] do
Begin
inc(len);
actasmpattern[len]:=c;
c:=current_scanner^.asmgetchar;
end;
actasmpattern[0]:=chr(len);
uppervar(actasmpattern);
if (actasmpattern = '%ST') and (c='(') then
Begin
actasmpattern:=actasmpattern+c;
c:=current_scanner^.asmgetchar;
if c in ['0'..'9'] then
actasmpattern:=actasmpattern + c
else
Message(asmr_e_invalid_fpu_register);
c:=current_scanner^.asmgetchar;
if c <> ')' then
Message(asmr_e_invalid_fpu_register)
else
Begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar; { let us point to next character. }
end;
end;
if is_register(actasmpattern) then
exit;
Message(asmr_w_modulo_not_supported);
end;
'1'..'9': { integer number }
begin
len:=0;
while c in ['0'..'9'] do
Begin
inc(len);
actasmpattern[len]:=c;
c:=current_scanner^.asmgetchar;
end;
actasmpattern[0]:=chr(len);
actasmpattern:=tostr(ValDecimal(actasmpattern));
actasmtoken:=AS_INTNUM;
exit;
end;
'0' : { octal,hexa,real or binary number. }
begin
actasmpattern:=c;
c:=current_scanner^.asmgetchar;
case upcase(c) of
'B': { binary }
Begin
c:=current_scanner^.asmgetchar;
while c in ['0','1'] do
Begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar;
end;
actasmpattern:=tostr(ValBinary(actasmpattern));
actasmtoken:=AS_INTNUM;
exit;
end;
'D': { real }
Begin
c:=current_scanner^.asmgetchar;
{ get ridd of the 0d }
if (c in ['+','-']) then
begin
actasmpattern:=c;
c:=current_scanner^.asmgetchar;
end
else
actasmpattern:='';
while c in ['0'..'9'] do
Begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar;
end;
if c='.' then
begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar;
while c in ['0'..'9'] do
Begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar;
end;
if upcase(c) = 'E' then
begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar;
if (c in ['+','-']) then
begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar;
end;
while c in ['0'..'9'] do
Begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar;
end;
end;
actasmtoken:=AS_REALNUM;
exit;
end
else
begin
Message1(asmr_e_invalid_float_const,actasmpattern+c);
actasmtoken:=AS_NONE;
end;
end;
'X': { hexadecimal }
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(ValHexaDecimal(actasmpattern));
actasmtoken:=AS_INTNUM;
exit;
end;
'1'..'7': { octal }
begin
actasmpattern:=actasmpattern + c;
while c in ['0'..'7'] do
Begin
actasmpattern:=actasmpattern + c;
c:=current_scanner^.asmgetchar;
end;
actasmpattern:=tostr(ValOctal(actasmpattern));
actasmtoken:=AS_INTNUM;
exit;
end;
else { octal number zero value...}
Begin
actasmpattern:=tostr(ValOctal(actasmpattern));
actasmtoken:=AS_INTNUM;
exit;
end;
end; { end case }
end;
'&' :
begin
c:=current_scanner^.asmgetchar;
actasmtoken:=AS_AND;
end;
'''' : { char }
begin
actasmpattern:='';
repeat
c:=current_scanner^.asmgetchar;
case c of
'\' :
begin
{ copy also the next char so \" is parsed correctly }
c:=current_scanner^.asmgetchar;
actasmpattern:=actasmpattern+c;
end;
'''' :
begin
c:=current_scanner^.asmgetchar;
break;
end;
newline:
Message(scan_f_string_exceeds_line);
else
actasmpattern:=actasmpattern+c;
end;
until false;
actasmpattern:=EscapeToPascal(actasmpattern);
actasmtoken:=AS_STRING;
exit;
end;
'"' : { string }
begin
actasmpattern:='';
repeat
c:=current_scanner^.asmgetchar;
case c of
'\' :
begin
{ copy also the next char so \" is parsed correctly }
c:=current_scanner^.asmgetchar;
actasmpattern:=actasmpattern+c;
end;
'"' :
begin
c:=current_scanner^.asmgetchar;
break;
end;
newline:
Message(scan_f_string_exceeds_line);
else
actasmpattern:=actasmpattern+c;
end;
until false;
actasmpattern:=EscapeToPascal(actasmpattern);
actasmtoken:=AS_STRING;
exit;
end;
'$' :
begin
actasmtoken:=AS_DOLLAR;
c:=current_scanner^.asmgetchar;
exit;
end;
',' :
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
Message(asmr_e_nor_not_supported);
c:=current_scanner^.asmgetchar;
actasmtoken:=AS_NONE;
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
c:=current_scanner^.asmgetchar;
actasmtoken:=AS_SLASH;
exit;
end;
'{',#13,newline,';' :
begin
{ the comment is read by asmgetchar }
c:=current_scanner^.asmgetchar;
firsttoken:=TRUE;
actasmtoken:=AS_SEPARATOR;
exit;
end;
else
Begin
Message(scan_f_illegal_char);
end;
end;
end;
end;
function 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 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
*****************************************************************************}
Procedure BuildRecordOffsetSize(const expr: string;var offset:longint;var size:longint);
{ 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 BuildConstSymbolExpression(allowref,betweenbracket,needofs:boolean;var value:longint;var asmsym:string);
{*********************************************************************}
{ FUNCTION BuildConstExpression: longint }
{ Description: This routine calculates a constant expression to }
{ a given value. The return value is the value calculated from }
{ the expression. }
{ The following tokens (not strings) are recognized: }
{ (,),SHL,SHR,/,*,NOT,OR,XOR,AND,MOD,+/-,numbers,ID to constants. }
{*********************************************************************}
{ ENTRY: On entry the token should be any valid expression token. }
{ EXIT: On Exit the token points to any token after the closing }
{ RBRACKET }
{ ERROR RECOVERY: Tries to find COMMA or SEPARATOR token by consuming }
{ invalid tokens. }
{*********************************************************************}
var
hs,tempstr,expr : string;
parenlevel,l,k : longint;
errorflag : boolean;
prevtok : tasmtoken;
sym : psym;
hl : plabel;
Begin
asmsym:='';
value:=0;
errorflag:=FALSE;
tempstr:='';
expr:='';
inexpression:=TRUE;
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_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
Comment(V_Error,'assem_e_dollar_without_identifier');
end;
AS_ID:
Begin
tempstr:=actasmpattern;
prevtok:=prevasmtoken;
consume(AS_ID);
if actasmtoken=AS_DOT then
begin
BuildRecordOffsetSize(tempstr,l,k);
str(l, tempstr);
expr:=expr + tempstr;
end
else
if SearchIConstant(tempstr,l) then
begin
str(l, tempstr);
expr:=expr + tempstr;
end
else
begin
hs:='';
if SearchLabel(tempstr,hl) then
hs:=lab2str(hl)
else
begin
getsym(tempstr,false);
sym:=srsym;
if assigned(sym) then
begin
if sym^.owner^.symtabletype in [localsymtable,parasymtable] then
Writeln('can''t use local variable or parameters here');
case srsym^.typ of
varsym :
hs:=pvarsym(srsym)^.mangledname;
typedconstsym :
hs:=ptypedconstsym(srsym)^.mangledname;
procsym :
hs:=pprocsym(srsym)^.mangledname;
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_offset);
if asmsym='' then
asmsym:=hs
else
Message(asmr_e_cant_have_multiple_relocatable_symbols);
if (expr='') or (expr[length(expr)]='+') then
begin
delete(expr,length(expr),1);
if not(actasmtoken in [AS_MINUS,AS_PLUS,AS_COMMA,AS_SEPARATOR,AS_END]) then
Message(asmr_e_only_add_relocatable_symbol);
end
else
Message(asmr_e_only_add_relocatable_symbol);
end;
end;
end;
AS_SEPARATOR,
AS_COMMA:
Begin
break;
end;
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 BuildConstExpression(allowref,betweenbracket:boolean): longint;
var
l : longint;
hs : string;
begin
BuildConstSymbolExpression(allowref,betweenbracket,false,l,hs);
if hs<>'' then
Message(asmr_e_relocatable_symbol_not_allowed);
BuildConstExpression:=l;
end;
Procedure BuildRealConstant(typ : tfloattype);
{*********************************************************************}
{ PROCEDURE BuilRealConst }
{ Description: This routine calculates a constant expression to }
{ a given value. The return value is the value calculated from }
{ the expression. }
{ The following tokens (not strings) are recognized: }
{ +/-,numbers and real numbers }
{*********************************************************************}
{ ENTRY: On entry the token should be any valid expression token. }
{ EXIT: On Exit the token points to either COMMA or SEPARATOR }
{ ERROR RECOVERY: Tries to find COMMA or SEPARATOR token by consuming }
{ invalid tokens. }
{*********************************************************************}
var expr: string;
tempstr: string;
r : bestreal;
code : integer;
negativ : boolean;
errorflag: boolean;
Begin
errorflag:=FALSE;
Repeat
negativ:=false;
expr:='';
tempstr:='';
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);
end;
AS_REALNUM: Begin
expr:=actasmpattern;
{ 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
expr:=copy(expr,3,255);
Consume(AS_REALNUM);
end;
else
Begin
{ only write error once. }
if not errorflag then
Message(asmr_e_invalid_float_expr);
{ consume tokens until we find COMMA or SEPARATOR }
Consume(actasmtoken);
errorflag:=TRUE;
End;
end;
{ go to next term }
if (actasmtoken in [AS_COMMA,AS_SEPARATOR]) then
Begin
if negativ then expr:='-'+expr;
val(expr,r,code);
if code<>0 then
Begin
r:=0;
Message(asmr_e_invalid_float_expr);
ConcatRealConstant(curlist,r,typ);
End
else
Begin
ConcatRealConstant(curlist,r,typ);
End;
end
else
Message(asmr_e_invalid_float_expr);
Until actasmtoken=AS_SEPARATOR;
end;
Procedure BuildReference(var Instr: TInstruction);
{*********************************************************************}
{ PROCEDURE BuildReference }
{ Description: This routine builds up an expression after a LPAREN }
{ token is encountered. }
{ On entry actasmtoken should be equal to AS_LPAREN }
{*********************************************************************}
{ EXIT CONDITION: On exit the routine should point to either the }
{ AS_COMMA or AS_SEPARATOR token. }
{*********************************************************************}
procedure Consume_RParen;
begin
if actasmtoken <> AS_RPAREN then
Begin
Message(asmr_e_invalid_reference_syntax);
RecoverConsume(true);
end
else
begin
Consume(AS_RPAREN);
if not (actasmtoken in [AS_COMMA,AS_SEPARATOR]) then
Begin
Message(asmr_e_invalid_reference_syntax);
RecoverConsume(true);
end;
end;
end;
procedure Consume_Scale;
var
l : longint;
begin
{ we have to process the scaling }
l:=BuildConstExpression(false,true);
if ((l = 2) or (l = 4) or (l = 8) or (l = 1)) then
instr.operands[operandnum].ref.scalefactor:=l
else
Begin
Message(asmr_e_wrong_scale_factor);
instr.operands[operandnum].ref.scalefactor:=0;
end;
end;
Begin
Consume(AS_LPAREN);
initAsmRef(instr,operandnum);
Case actasmtoken of
AS_INTNUM,
AS_MINUS,
AS_PLUS: { absolute offset, such as fs:(0x046c) }
Begin
{ offset(offset) is invalid }
If Instr.Operands[OperandNum].Ref.Offset <> 0 Then
Begin
Message(asmr_e_invalid_reference_syntax);
RecoverConsume(true);
End
Else
Begin
Instr.Operands[OperandNum].Ref.Offset:=BuildConstExpression(false,true);
Consume_RParen;
end;
exit;
End;
AS_REGISTER: { (reg ... }
Begin
{ Check if there is already a base (mostly ebp,esp) than this is
not allowed,becuase it will give crashing code }
if instr.operands[operandnum].ref.base<>R_NO then
Message(asmr_e_cannot_index_relative_var);
instr.operands[operandnum].ref.base:=actasmregister;
Consume(AS_REGISTER);
{ can either be a register or a right parenthesis }
{ (reg) }
if actasmtoken=AS_RPAREN then
Begin
Consume_RParen;
exit;
end;
{ (reg,reg .. }
Consume(AS_COMMA);
if actasmtoken=AS_REGISTER then
Begin
instr.operands[operandnum].ref.index:=actasmregister;
Consume(AS_REGISTER);
{ check for scaling ... }
case actasmtoken of
AS_RPAREN:
Begin
Consume_RParen;
exit;
end;
AS_COMMA:
Begin
Consume(AS_COMMA);
Consume_Scale;
Consume_RParen;
end;
else
Begin
Message(asmr_e_invalid_reference_syntax);
RecoverConsume(false);
end;
end; { end case }
end
else
Begin
Message(asmr_e_invalid_reference_syntax);
RecoverConsume(false);
end;
end; {end case }
AS_COMMA: { (, ... can either be scaling, or index }
Begin
Consume(AS_COMMA);
{ Index }
if (actasmtoken=AS_REGISTER) then
Begin
instr.operands[operandnum].ref.index:=actasmregister;
Consume(AS_REGISTER);
{ check for scaling ... }
case actasmtoken of
AS_RPAREN:
Begin
Consume_RParen;
exit;
end;
AS_COMMA:
Begin
Consume(AS_COMMA);
Consume_Scale;
Consume_RParen;
end;
else
Begin
Message(asmr_e_invalid_reference_syntax);
RecoverConsume(false);
end;
end; {end case }
end
{ Scaling }
else
Begin
Consume_Scale;
Consume_RParen;
exit;
end;
end;
else
Begin
Message(asmr_e_invalid_reference_syntax);
RecoverConsume(false);
end;
end;
end;
Procedure BuildOperand(var instr: TInstruction);
Procedure BuildConstOperand(var instr: TInstruction);
var
l : longint;
tempstr : string;
begin
BuildConstSymbolExpression(false,false,true,l,tempstr);
if tempstr<>'' then
begin
instr.operands[operandnum].operandtype:=OPR_SYMBOL;
instr.operands[operandnum].symofs:=l;
instr.operands[operandnum].symbol:=newasmsymbol(tempstr);
end
else
begin
instr.operands[operandnum].operandtype:=OPR_CONSTANT;
instr.operands[operandnum].val:=l;
end;
end;
function MaybeBuildReference:boolean;
{ Try to create a reference, if not a reference is found then false
is returned }
begin
MaybeBuildReference:=true;
case actasmtoken of
AS_INTNUM,
AS_MINUS,
AS_PLUS:
Begin
instr.operands[operandnum].ref.offset:=BuildConstExpression(True,False);
if actasmtoken<>AS_LPAREN then
Message(asmr_e_invalid_reference_syntax)
else
BuildReference(instr);
end;
AS_LPAREN:
BuildReference(instr);
AS_ID: { only a variable is allowed ... }
Begin
{ is it a normal variable ? }
if not CreateVarInstr(instr,actasmpattern,operandnum) then
begin
{ check for direct symbolic names }
{ only if compiling the system unit }
if (cs_compilesystem in aktmoduleswitches) then
begin
if not SearchDirectVar(instr,actasmpattern,operandnum) then
Message(asmr_e_invalid_seg_override);
end
else
Message(asmr_e_invalid_seg_override);
end;
Consume(actasmtoken);
case actasmtoken of
AS_SEPARATOR,
AS_COMMA: ;
AS_LPAREN: BuildReference(instr);
else
Begin
Message(asmr_e_invalid_seg_override);
Consume(actasmtoken);
end;
end; {end case }
end;
else
MaybeBuildReference:=false;
end; { end case }
end;
var
expr,
tempstr : string;
tempreg : tregister;
lab : PAsmLabelRec;
hl : plabel;
tsize,l,
toffset : longint;
Begin
tempstr:='';
expr:='';
case actasmtoken of
AS_LPAREN: { Memory reference or constant expression }
Begin
initAsmRef(instr,operandnum);
BuildReference(instr);
end;
AS_DOLLAR: { Constant expression }
Begin
Consume(AS_DOLLAR);
BuildConstOperand(instr);
end;
AS_INTNUM,
AS_MINUS,
AS_PLUS:
Begin
{ Constant memory offset }
{ This must absolutely be followed by ( }
initAsmRef(instr,operandnum);
instr.operands[operandnum].ref.offset:=BuildConstExpression(True,False);
if actasmtoken<>AS_LPAREN then
Message(asmr_e_invalid_reference_syntax)
else
BuildReference(instr);
end;
AS_STAR: { Call from memory address }
Begin
Consume(AS_STAR);
if actasmtoken=AS_REGISTER then
begin
instr.operands[operandnum].operandtype:=OPR_REGISTER;
instr.operands[operandnum].reg:=actasmregister;
instr.operands[operandnum].size:=reg_2_opsize[actasmregister];
Consume(AS_REGISTER);
end
else
begin
initAsmRef(instr,operandnum);
if not MaybeBuildReference then
Message(asmr_e_syn_operand);
end;
{ this is only allowed for call's and jmp's }
case instr.opcode of
A_CALL,
A_JMP,
A_Jcc : ;
else
Message(asmr_e_syn_operand);
end;
end;
AS_ID: { A constant expression, or a Variable ref. }
Begin
{ Local label ? }
if (actasmpattern[1] ='.') and (actasmpattern[2] = 'L') then
Begin
delete(actasmpattern,1,2);
if actasmpattern = '' then
Message(asmr_e_null_label_ref_not_allowed);
lab:=labellist.search(actasmpattern);
{ check if the label is already defined }
{ if so, we then check if the plabel is }
{ non-nil, if so we add it to instruction }
if assigned(lab) then
Begin
if assigned(lab^.lab) then
Begin
instr.operands[operandnum].operandtype:=OPR_LABINSTR;
instr.operands[operandnum].hl:=lab^.lab;
instr.labeled:=TRUE;
end;
end
else
Begin
{ the label does not exist, create it }
{ emit the opcode, but set that the }
{ label has not been emitted }
getlabel(hl);
labellist.insert(actasmpattern,hl,FALSE);
instr.operands[operandnum].operandtype:=OPR_LABINSTR;
instr.operands[operandnum].hl:=hl;
instr.labeled:=TRUE;
end;
Consume(AS_ID);
if not (actasmtoken in [AS_SEPARATOR,AS_COMMA]) then
Message(asmr_e_syntax_error);
end
else
{ probably a variable or normal expression }
{ or a procedure (such as in CALL ID) }
Begin
{ check if this is a label, if so then }
{ emit it as a label. }
if SearchLabel(actasmpattern,hl) then
Begin
instr.operands[operandnum].operandtype:=OPR_LABINSTR;
instr.operands[operandnum].hl:=hl;
instr.labeled:=TRUE;
Consume(AS_ID);
if not (actasmtoken in [AS_SEPARATOR,AS_COMMA]) then
Message(asmr_e_syntax_error);
end
else
{ is it a normal variable ? }
Begin
{ context for scanner }
initAsmRef(instr,operandnum);
if not CreateVarInstr(instr,actasmpattern,operandnum) then
Begin
{ look for special symbols ... }
if actasmpattern = '__RESULT' then
SetUpResult(instr,operandnum)
else
if actasmpattern = '__SELF' then
Begin
if assigned(procinfo._class) then
Begin
instr.operands[operandnum].operandtype:=OPR_REFERENCE;
instr.operands[operandnum].ref.offset:=procinfo.ESI_offset;
instr.operands[operandnum].ref.base:=procinfo.framepointer;
end
else
Message(asmr_e_cannot_use___SELF_outside_methode);
end
else
if actasmpattern = '__OLDEBP' then
Begin
if lexlevel>normal_function_level then
Begin
instr.operands[operandnum].operandtype:=OPR_REFERENCE;
instr.operands[operandnum].ref.offset:=procinfo.framepointer_offset;
instr.operands[operandnum].ref.base:=procinfo.framepointer;
end
else
Message(asmr_e_cannot_use___OLDEBP_outside_nested_procedure);
end
else
{ check for direct symbolic names }
{ only if compiling the system unit }
if (cs_compilesystem in aktmoduleswitches) then
begin
if not SearchDirectVar(instr,actasmpattern,operandnum) then
Begin
{ not found, finally ... add it anyways ... }
Message1(asmr_w_id_supposed_external,actasmpattern);
instr.operands[operandnum].ref.symbol:=newasmsymbol(actasmpattern);
end;
end
else
Message1(sym_e_unknown_id,actasmpattern);
end;
{ constant expression? }
if (instr.operands[operandnum].operandtype=OPR_CONSTANT) then
begin
l:=BuildConstExpression(true,false);
{ indexing? }
if actasmtoken=AS_LPAREN then
begin
instr.operands[operandnum].operandtype:=OPR_REFERENCE;
reset_reference(Instr.Operands[OperandNum].Ref);
Instr.Operands[OperandNum].Ref.Offset:=l;
BuildReference(instr);
end
else
Instr.Operands[OperandNum].Val:=l;
end
else
begin
expr:=actasmpattern;
Consume(AS_ID);
if actasmtoken=AS_DOT then
begin
BuildRecordOffsetSize(expr,toffset,tsize);
inc(instr.operands[operandnum].ref.offset,toffset);
SetOperandSize(instr,operandnum,tsize);
end;
if actasmtoken in [AS_PLUS,AS_MINUS] then
inc(instr.operands[operandnum].ref.offset,BuildConstExpression(true,false));
if actasmtoken=AS_LPAREN then
BuildReference(instr);
end;
end; { end if }
end; { end if }
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);
initAsmRef(instr,operandnum);
instr.operands[operandnum].ref.segment:=tempreg;
{ This must absolutely be followed by a reference }
if not MaybeBuildReference then
Begin
Message(asmr_e_invalid_seg_override);
Consume(actasmtoken);
end;
end
{ Simple register }
else if (actasmtoken in [AS_SEPARATOR,AS_COMMA]) then
Begin
if not (instr.operands[operandnum].operandtype in [OPR_NONE,OPR_REGISTER]) then
Message(asmr_e_invalid_operand_type);
instr.operands[operandnum].operandtype:=OPR_REGISTER;
instr.operands[operandnum].reg:=tempreg;
instr.operands[operandnum].size:=reg_2_opsize[tempreg];
end
else
Message(asmr_e_syn_operand);
end;
AS_SEPARATOR,
AS_COMMA: ;
else
Begin
Message(asmr_e_syn_operand);
Consume(actasmtoken);
end;
end; { end case }
end;
Procedure BuildConstant(maxvalue: longint);
{*********************************************************************}
{ PROCEDURE BuildConstant }
{ Description: This routine takes care of parsing a DB,DD,or DW }
{ line and adding those to the assembler node. Expressions, range- }
{ checking are fullly taken care of. }
{ maxvalue: $ff -> indicates that this is a DB node. }
{ $ffff -> indicates that this is a DW node. }
{ $ffffffff -> indicates that this is a DD node. }
{*********************************************************************}
{ EXIT CONDITION: On exit the routine should point to AS_SEPARATOR. }
{*********************************************************************}
var
strlength: byte;
asmsym,
expr: string;
value : longint;
Begin
Repeat
Case actasmtoken of
AS_STRING:
Begin
if maxvalue = $ff then
strlength:=1
else
Message(asmr_e_string_not_allowed_as_const);
expr:=actasmpattern;
if length(expr) > 1 then
Message(asmr_e_string_not_allowed_as_const);
Consume(AS_STRING);
Case actasmtoken of
AS_COMMA: Consume(AS_COMMA);
AS_SEPARATOR: ;
else
Message(asmr_e_invalid_string_expression);
end; { end case }
ConcatString(curlist,expr);
end;
AS_INTNUM,
AS_PLUS,
AS_MINUS,
AS_LPAREN,
AS_NOT,
AS_ID :
Begin
BuildConstSymbolExpression(false,false,false,value,asmsym);
if asmsym<>'' then
begin
if maxvalue<>$ffffffff then
Comment(V_Warning,'32bit constant created for address');
ConcatConstSymbol(curlist,asmsym,value)
end
else
ConcatConstant(curlist,value,maxvalue);
end;
AS_COMMA:
Consume(AS_COMMA);
AS_SEPARATOR:
break;
else
begin
Message(asmr_e_syn_constant);
RecoverConsume(false);
end
end; { end case }
Until false;
end;
Procedure BuildStringConstant(asciiz: boolean);
{*********************************************************************}
{ PROCEDURE BuildStringConstant }
{ Description: Takes care of a ASCII, or ASCIIZ directive. }
{ asciiz: boolean -> if true then string will be null terminated. }
{*********************************************************************}
{ EXIT CONDITION: On exit the routine should point to AS_SEPARATOR. }
{ On ENTRY: Token should point to AS_STRING }
{*********************************************************************}
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_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;
Procedure BuildOpCode;
{*********************************************************************}
{ PROCEDURE BuildOpcode; }
{ Description: Parses the intel opcode and operands, and writes it }
{ in the TInstruction object. }
{*********************************************************************}
{ EXIT CONDITION: On exit the routine should point to AS_SEPARATOR. }
{ On ENTRY: Token should point to AS_OPCODE }
{*********************************************************************}
var
PrefixOp,OverrideOp: tasmop;
expr : string;
Begin
expr:='';
PrefixOp:=A_None;
OverrideOp:=A_None;
{ prefix seg opcode / prefix opcode }
repeat
if is_prefix(actopcode) then
begin
PrefixOp:=ActOpcode;
instr.opcode:=ActOpcode;
instr.condition:=ActCondition;
instr.opsize:=ActOpsize;
ConcatInstruction(curlist,instr);
Consume(AS_OPCODE);
end
else
if is_override(actopcode) then
begin
OverrideOp:=ActOpcode;
instr.opcode:=ActOpcode;
instr.condition:=ActCondition;
instr.opsize:=ActOpsize;
ConcatInstruction(curlist,instr);
Consume(AS_OPCODE);
end
else
break;
{ allow for newline as in gas styled syntax }
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(true);
exit;
end;
{ Fill the instr object with the current state }
instr.Opcode:=ActOpcode;
instr.condition:=ActCondition;
instr.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);
{ We are reading operands, so opcode will be an AS_ID }
operandnum:=1;
Consume(AS_OPCODE);
{ Zero operand opcode ? }
if actasmtoken in [AS_SEPARATOR,AS_END] then
begin
operandnum:=0;
exit;
end;
{ Read the operands }
repeat
case actasmtoken of
AS_COMMA: { Operand delimiter }
Begin
if operandnum > MaxOperands then
Message(asmr_e_too_many_operands)
else
Inc(operandnum);
Consume(AS_COMMA);
end;
AS_SEPARATOR,
AS_END : { End of asm operands for this opcode }
begin
break;
end;
else
BuildOperand(instr);
end; { end case }
until false;
end;
Function Assemble: Ptree;
{*********************************************************************}
{ PROCEDURE Assemble; }
{ Description: Parses the att assembler syntax, parsing is done }
{ according to GAs rules. }
{*********************************************************************}
Var
hl : plabel;
labelptr,
nextlabel : PAsmLabelRec;
commname : string;
lastsec : tsection;
Begin
Message1(asmr_d_start_reading,'AT&T');
firsttoken:=TRUE;
operandnum:=0;
if assigned(procinfo.retdef) and
(is_fpu(procinfo.retdef) or
ret_in_acc(procinfo.retdef)) then
procinfo.funcret_is_valid:=true;
{ sets up all opcode and register tables in uppercase }
if not _asmsorted then
Begin
SetupTables;
_asmsorted:=TRUE;
end;
curlist:=new(paasmoutput,init);
lastsec:=sec_code;
{ setup label linked list }
labellist.init;
{ start tokenizer }
c:=current_scanner^.asmgetchar;
gettoken;
{ main loop }
repeat
case actasmtoken of
AS_LLABEL:
Begin
labelptr:=labellist.search(actasmpattern);
if not assigned(labelptr) then
Begin
getlabel(hl);
labellist.insert(actasmpattern,hl,TRUE);
ConcatLabel(curlist,hl);
end
else
Begin
{ the label has already been inserted into the }
{ label list, either as an instruction label (in}
{ this case it has not been emitted), or as a }
{ duplicate local symbol (in this case it has }
{ already been emitted). }
if labelptr^.emitted then
Message1(asmr_e_dup_local_sym,'.L'+labelptr^.name^)
else
Begin
if assigned(labelptr^.lab) then
ConcatLabel(curlist,labelptr^.lab);
labelptr^.emitted:=TRUE;
end;
end;
Consume(AS_LLABEL);
end;
AS_LABEL:
Begin
{ when looking for Pascal labels, these must }
{ be in uppercase. }
if SearchLabel(upper(actasmpattern),hl) then
ConcatLabel(curlist,hl)
else
Begin
if (cs_compilesystem in aktmoduleswitches) then
begin
Message1(asmr_e_unknown_label_identifier,actasmpattern);
{ once again we don't know what it represents }
{ so we simply concatenate it }
ConcatLocal(curlist,actasmpattern);
end
else
Message1(asmr_e_unknown_label_identifier,actasmpattern);
end;
Consume(AS_LABEL);
end;
AS_DW:
Begin
Consume(AS_DW);
BuildConstant($ffff);
end;
AS_DATA:
Begin
curlist^.Concat(new(pai_section,init(sec_data)));
lastsec:=sec_data;
Consume(AS_DATA);
end;
AS_TEXT:
Begin
curlist^.Concat(new(pai_section,init(sec_code)));
lastsec:=sec_code;
Consume(AS_TEXT);
end;
AS_DB:
Begin
Consume(AS_DB);
BuildConstant($ff);
end;
AS_DD:
Begin
Consume(AS_DD);
BuildConstant($ffffffff);
end;
AS_DQ:
Begin
Consume(AS_DQ);
BuildRealConstant(s64comp);
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);
ConcatAlign(curlist,BuildConstExpression(false,false));
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);
ConcatLocalBss(actasmpattern,BuildConstExpression(false,false));
if actasmtoken<>AS_SEPARATOR then
Consume(AS_SEPARATOR);
end;
AS_COMM:
Begin
Consume(AS_LCOMM);
commname:=actasmpattern;
Consume(AS_ID);
Consume(AS_COMMA);
ConcatGlobalBss(actasmpattern,BuildConstExpression(false,false));
if actasmtoken<>AS_SEPARATOR then
Consume(AS_SEPARATOR);
end;
AS_OPCODE:
Begin
instr.init;
BuildOpcode;
instr.ops:=operandnum;
AddReferenceSizes(instr);
SetInstructionOpsize(instr);
CheckOperandSizes(instr);
ConcatInstruction(curlist,instr);
instr.done;
operandnum:=0;
end;
AS_SEPARATOR:
Begin
Consume(AS_SEPARATOR);
{ let us go back to the first operand }
operandnum:=0;
end;
AS_END:
begin
break; { end assembly block }
end;
else
Begin
Message(asmr_e_syntax_error);
RecoverConsume(false);
end;
end;
until false;
{ check if there were undefined symbols. }
{ if so, then list each of those undefined }
{ labels. }
if assigned(labellist.First) then
Begin
labelptr:=labellist.First;
While labelptr <> nil do
Begin
nextlabel:=labelptr^.next;
if not labelptr^.emitted then
Message1(asmr_e_unknown_label_identifier,'.L'+labelptr^.name^);
labelptr:=nextlabel;
end;
end;
{ are we back in the code section? }
if lastsec<>sec_code then
begin
Message(asmr_w_assembler_code_not_returned_to_text);
curlist^.Concat(new(pai_section,init(sec_code)));
end;
assemble:=genasmnode(curlist);
labellist.done;
Message1(asmr_d_finish_reading,'AT&T');
end;
{*****************************************************************************
Initialize
*****************************************************************************}
var
old_exit : pointer;
procedure ra386att_exit;{$ifndef FPC}far;{$endif}
begin
if assigned(iasmops) then
dispose(iasmops);
if assigned(iasmregs) then
dispose(iasmregs);
exitproc:=old_exit;
end;
begin
old_exit:=exitproc;
exitproc:=@ra386att_exit;
end.
{
$Log$
Revision 1.47 1999-05-21 13:55:13 peter
* NEWLAB for label as symbol
Revision 1.46 1999/05/12 00:19:56 peter
* removed R_DEFAULT_SEG
* uniform float names
Revision 1.45 1999/05/06 09:05:25 peter
* generic write_float and str_float
* fixed constant float conversions
Revision 1.44 1999/05/05 22:22:00 peter
* updated messages
Revision 1.43 1999/05/04 21:45:01 florian
* changes to compile it with Delphi 4.0
Revision 1.42 1999/05/02 14:25:07 peter
* only allow *<reg/ref> when call/jmp is used
Revision 1.41 1999/05/01 13:48:39 peter
* merged nasm compiler
Revision 1.7 1999/04/29 09:37:47 peter
* fixed var+const support
Revision 1.6 1999/04/26 23:26:17 peter
* redesigned record offset parsing to support nested records
* normal compiler uses the redesigned createvarinstr()
Revision 1.5 1999/04/20 11:01:23 peter
* better tokenpos info
Revision 1.4 1999/04/14 09:07:45 peter
* asm reader improvements
Revision 1.3 1999/03/06 17:24:26 peter
* rewritten intel parser a lot, especially reference reading
* size checking added for asm parsers
Revision 1.2 1999/03/02 02:56:30 peter
+ stabs support for binary writers
* more fixes and missing updates from the previous commit :(
Revision 1.1 1999/03/01 15:46:26 peter
* ag386bin finally make cycles correct
* prefixes are now also normal opcodes
}
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