void Compiler::EmitFunction(FunctionSymbol p)
{
BBlock bb;
int varsize;
Export((Symbol)p);
DefineLabel((Symbol)p);
LayoutFrame(p, 2);
/*
pushl %ebp
movl %esp, %ebp
*/
varsize = p->locals.size();
EmitPrologue(varsize);
bb = p->entryBB;
while (true)
{
if (bb->ref != 0) DefineLabel(bb->sym);
EmitBBlock(bb);
if (bb != p->exitBB)
bb = bb->next;
else
break;
}
/*
movl %sebp, %esp
popl %ebp
*/
EmitEpilogue(varsize);
}
short Directives()
{
int t;
SkipWhiteSpace();
if (*FilePtr != '.')
return 0;
DataCharPtr = FilePtr;
if (QToken(".eof"))
{
// mark end of label array as end of bss
strcpy(Name, "_________eof_________");
Section = SECT_bss;
DefineLabel(label_Local);
SourceFileCheckEOF(LastTokenPtr() - FileTop);
EndFile = 1;
return 1;
}
GetToken();
t = ScanAsmToken();
switch(t)
{
//---------------------------------------------------------
case 0:
Error(Error_Skip, "Illegal directive '%s'",Name);
//---------------------------------------------------------
case dir_sourcefile:
{
int file;
SkipWhiteSpace();
GetLFileName();
// SetCSourceFile(Name);
file = SetSLD_Name(Name);
SetCSourceFile(Name, file);
return 1;
}
//---------------------------------------------------------
case dir_model:
{
int model=0;
if (Token("full")) // Get return type
model = MODEL_full;
else if (Token("half")) // Get return type
model = MODEL_half;
else if (Token("compact")) // Get return type
model = MODEL_compact;
else if (Token("mini")) // Get return type
model = MODEL_mini;
else if (Token("tiny")) // Get return type
model = MODEL_tiny;
else
Error(Error_Fatal, "invalid model type");
// if model is not set then set it
if (!CurrentModel)
CurrentModel = model;
else
{
if (model != CurrentModel)
Error(Error_Fatal, "multiple architectual models defined");
}
return 1;
}
//---------------------------------------------------------
case dir_ctor:
{
SYMBOL* ref;
imm = GetExpression(); // Get the number
ref = GetLastSymbolRef();
if(pass_count > 1)
{
if (!ref)
Error(Error_Fatal, "Constructor has bad reference");
ArraySet(&CtorArrayImm, CtorCount, imm);
ArraySet(&CtorArray, CtorCount++, (int) ref);
}
return 1;
}
//---------------------------------------------------------
case dir_dtor:
{
SYMBOL* ref;
imm = GetExpression(); // Get the number
ref = GetLastSymbolRef();
if(pass_count > 1)
{
if (!ref)
Error(Error_Fatal, "Destructor has bad reference");
ArraySet(&DtorArrayImm, DtorCount, imm);
ArraySet(&DtorArray, DtorCount++, (int) ref);
}
return 1;
}
//---------------------------------------------------------
case dir_sourcedir:
{
SkipWhiteSpace();
GetLFileName();
SetCSourceDir(Name);
return 1;
}
//---------------------------------------------------------
case dir_line:
{
int v;
SkipWhiteSpace();
v = GetNum();
SetCSourceLine(v);
SetSLD_Line(v);
return 1;
}
//---------------------------------------------------------
case dir_dlab:
{
if (!ArgUseStabs)
{
SkipLine(); // Skip excess debug labels
return 1;
}
// Define a label
Section = SECT_code;
GetAsmName();
DefineLabel(label_Local);
return 1;
}
//---------------------------------------------------------
case dir_library:
{
SkipLine();
return 1;
}
//---------------------------------------------------------
case dir_exit:
{
if (NextToken("\""))
{
GetStringName(1024);
Error(Error_Fatal, "User: %s", Name);
return 1;
}
Error(Error_Fatal, "Exiting with user error");
return 1;
}
//---------------------------------------------------------
case dir_asm_on:
{
return 1;
}
//---------------------------------------------------------
case dir_asm_off:
{
/* if (QToken(".asm_off"))
{
return 1;
}
*/
return 1;
}
//---------------------------------------------------------
case dir_AllowFarBranches:
{
AllowFarBranches = 1;
return 1;
}
//---------------------------------------------------------
case dir_bp:
{
return 1;
}
//---------------------------------------------------------
case dir_localscope:
{
SkipWhiteSpace();
if (Token("+"))
{
LocalScope++;
return 1;
}
if (Token("reset"))
{
LocalScope = 1;
return 1;
}
Error(Error_Fatal, "Bad .localscope type");
return 1;
}
//---------------------------------------------------------
case dir_func:
{
Function_Return_Type = RET_void;
GetName();
ReplaceChar(Name, '.', '_');
Function_Param_Count = -1;
if (Token(","))
{
Function_Param_Count = GetNum();
if (Token(",")) // Get param count
{
if (Token("int")) // Get return type
Function_Return_Type = RET_int;
else if (Token("float"))
Function_Return_Type = RET_float;
else if (Token("double"))
Function_Return_Type = RET_double;
else if (Token("void"))
Function_Return_Type = RET_void;
else if (Token("?"))
Function_Return_Type = RET_double; //patch fix
}
}
DefineLabel(label_Function);
return 1;
}
//---------------------------------------------------------
case dir_local:
{
GetName();
return 1;
}
//---------------------------------------------------------
case dir_vec_elt:
{
GetName();
return 1;
}
//---------------------------------------------------------
case dir_syscall:
{
char SysCallName[256];
char istr[4096];
char *iptr = 0;
int v, p, r;
p = 0;
r = RET_void;
GetName();
strcpy(SysCallName,Name);
SkipWhiteSpace();
v = GetExpression();
if (Token(",")) // Get param count
{
p = GetExpression();
NeedToken(",");
if (Token("int")) // Get return type
r = RET_int;
else if (Token("float"))
r = RET_float;
else if (Token("double"))
r = RET_double;
else if (Token("void"))
r = RET_void;
if (Token(",")) // Get interface
{
GetStringName(2048);
strcpy(istr,Name);
iptr = istr;
}
}
if (Pass == 1)
MapSysCall(SysCallName, v, p, r, iptr);
return 1;
}
//---------------------------------------------------------
case dir_lfile:
{
SkipWhiteSpace();
GetLFileName();
strcpy(CurrentFile, Name);
// CurrentFileLine = GetLineNumber(FileTop,GetPrevFilePtr());
AddFileSym(Name, LocalScope+1);
GetRelPath(CurrentFile);
return 1;
}
//---------------------------------------------------------
case dir_org:
{
int v = GetExpression();
if (v >= MAX_CODE_MEM)
Error(Error_Fatal, ".org has illegal address");
CodeIP = v;
//! CodePtr = &CodeMem[v];
printf("*Warning* org %x\n", v);
return 1;
}
//---------------------------------------------------------
case dir_set:
{
SkipWhiteSpace();
// Catch Thunks
if (Token("%"))
{
SYMBOL *ThunkSym;
int v;
v = GetDecNum(5);
if (GetDecNumDigitCount() == 0)
Error(Error_Fatal, "Missing Thunk Number");
NeedToken("=");
SkipWhiteSpace();
GetName(); // Get the name of the thunk alias
GetEnumValue(Name); // Evaluate the symbol
ThunkSym = GetLastSymbolRef();
//N_FUN 141 4935 '_Z7XPClosev:F(0,6)'
StabsEmit("N_THUNK %d %d '%s'\n", v, ThunkSym, Name);
RegisterThunk(v, ThunkSym);
return 1;
}
// Catch normal sets
GetName(); // Get the new type Name
NeedToken("=");
RedefENum(Name, GetExpression());
return 1;
}
//---------------------------------------------------------
case dir_debug:
{
DEBUG = (short)GetExpression();
return 1;
}
//---------------------------------------------------------
case dir_info:
{
INFO = (short)GetExpression();
return 1;
}
//---------------------------------------------------------
case dir_list:
{
LIST = (short)GetExpression();
return 1;
}
//---------------------------------------------------------
case dir_show:
{
int exp = GetExpression();
if (Pass == 1)
printf("%d",exp);
if (!Token(";"))
if (Pass == 1) printf("\n");
return 1;
}
//---------------------------------------------------------
case dir_print:
//if (QToken(".print") || QToken(".?"))
{
int exp;
char v;
if (Token("\""))
{
while(1)
{
v = *FilePtr;
if (v == 0 || v == '"')
break;
printf("%c",v);
FilePtr++;
}
NeedToken("\"");
if (!Token(";"))
printf("\n");
return 1;
}
exp = GetExpression();
printf("%d",exp);
if (!Token(";"))
printf("\n");
return 1;
}
//---------------------------------------------------------
case dir_ifdef:
{
GetName(); // Get the new type Name
SkipWhiteSpace();
if (!SymbolExists(Name, section_Script, -1))
{
if (NextToken("{"))
{
SkipPair('{','}');
}
}
return 1;
}
//---------------------------------------------------------
case dir_ifdefglobal:
{
GetName(); // Get the new type Name
SkipWhiteSpace();
if (!SymbolExists(Name, section_Enum, 0))
{
if (NextToken("{"))
{
SkipPair('{','}');
}
}
return 1;
}
//---------------------------------------------------------
case dir_ifndefglobal:
{
GetName(); // Get the new type Name
SkipWhiteSpace();
if (SymbolExists(Name, section_Enum, 0))
{
if (NextToken("{"))
{
SkipPair('{','}');
}
}
return 1;
}
//---------------------------------------------------------
case dir_ifndef:
{
GetName(); // Get the new type Name
SkipWhiteSpace();
if (SymbolExists(Name, section_Script, -1))
{
if (NextToken("{"))
{
SkipPair('{','}');
}
}
return 1;
}
//---------------------------------------------------------
case dir_if:
{
if (!GetExpression())
{
SkipWhiteSpace();
if (NextToken("{"))
{
SkipPair('{','}');
}
}
return 1;
}
//---------------------------------------------------------
case dir_do:
{
// If we have a '{' just ignore it an keep going
if (Token("{"))
return 1;
// Must be an expression then
// if false then skip to while
if (!GetExpression())
{
SearchScopeForward();
NeedToken(".enddo");
}
return 1;
}
//---------------------------------------------------------
case dir_enddo:
{
FilePtr = SearchScope(FilePtr);
return 1;
}
//---------------------------------------------------------
case dir_while:
{
if (GetExpression())
{
FilePtr = SearchScope(FilePtr);
}
return 1;
}
//---------------------------------------------------------
case dir_enum:
{
AsmEnums();
return 1;
}
//---------------------------------------------------------
case dir_breakpoint:
{
SkipWhiteSpace();
return 1;
}
//---------------------------------------------------------
case dir_globals_in_code:
{
GlobalsInCode = 1;
SkipWhiteSpace();
return 1;
}
//---------------------------------------------------------
case dir_globl:
// if (QToken(".globl") || QToken(".global") || QToken(".weak"))
{
unsigned int n;
GetAsmName();
if (GlobalsInCode && (Section == SECT_code))
{
//! *CodePtr++ = '*';
ArraySet(&CodeMemArray, CodeIP, '*');
CodeIP++;
for (n=0;n<strlen(Name);n++)
{
//! *CodePtr++ = Name[n];
ArraySet(&CodeMemArray, CodeIP, Name[n]);
CodeIP++;
}
//! *CodePtr++ = '*';
ArraySet(&CodeMemArray, CodeIP, '*');
CodeIP++;
}
if (LIST)
printf("Found global '%s'\n",Name);
DefineLabelGlobal();
//#ifdef INCLUDE_JAVAGEN
// if (JavaPass)
// JavaGen_Global(Name);
//#endif
SkipWhiteSpace();
return 1;
}
//---------------------------------------------------------
case dir_extern:
// if (QToken(".extern") || QToken(".extrn"))
{
GetAsmName();
if (LIST)
printf("Found external '%s'\n",Name);
// SHOULD DO NOTHING
//ExternDecl(Name);
SkipWhiteSpace();
return 1;
}
//---------------------------------------------------------
case dir_byte:
{
SetAsmDataChar();
do
{
imm = GetExpression(); // Get the number
WriteDataTypeArray(dir_byte, 1);
WriteByte(imm);
}
while (QToken(","));
return 1;
}
//---------------------------------------------------------
case dir_half:
{
SetAsmDataChar();
do
{
imm = GetExpression(); // Get the number
WriteDataTypeArray(dir_half, 2);
WriteWord(imm);
}
while (QToken(","));
return 1;
}
//---------------------------------------------------------
case dir_word:
{
SYMBOL *ref;
if (Section != SECT_data)
Error(Error_Skip,"data word in not in data section");
SetAsmDataChar();
do
{
imm = GetExpression(); // Get the number
WriteDataTypeArray(dir_word, 4);
ref = GetLastSymbolRef();
WriteLongRef(imm, ref);
}
while (QToken(","));
return 1;
}
//---------------------------------------------------------
case dir_space:
{
SetAsmDataChar();
imm = GetExpression(); // Get the number
if (LIST)
printf("space %d\n",imm);
if (!imm)
return 1;
WriteDataTypeArray(dir_space, imm);
do
{
WriteByteSpace(0);
}
while(--imm);
return 1;
}
//---------------------------------------------------------
case dir_string:
{
SetAsmDataChar();
WriteDataTypeArray(dir_string, 1);
GetStrings();
return 1;
}
//---------------------------------------------------------
case dir_comm:
{
int LastSect = Section;
SetAsmDataChar();
Section = SECT_bss;
GetAsmName();
//!! make this global too
DefineLabelGlobal();
DefineLabel(label_Local);
NeedToken(",");
imm = GetExpression(); // Get the number
if (LIST)
printf("comm %d to .bss\n",imm);
if (imm == 0)
return 1;
WriteDataTypeArray(dir_comm, imm);
BssIP += imm;
Section = LastSect;
return 1;
}
//---------------------------------------------------------
case dir_lcomm:
{
int LastSect = Section;
SetAsmDataChar();
Section = SECT_bss;
GetAsmName();
DefineLabel(label_Local);
NeedToken(",");
imm = GetExpression(); // Get the number
if (LIST)
printf("lcomm %d to .bss\n",imm);
if (imm == 0)
return 1;
WriteDataTypeArray(dir_lcomm, imm);
BssIP += imm;
Section = LastSect;
return 1;
}
//---------------------------------------------------------
case dir_align:
{
imm = GetExpression(); // Get the number
if (Section == SECT_code)
return 1;
AddAlignRef(imm);
return 1;
}
//---------------------------------------------------------
case dir_bss:
{
Section = SECT_bss;
if (LIST)
printf("** Section .bss IP = %x\n",BssIP);
return 1;
}
//---------------------------------------------------------
case dir_data:
{
Section = SECT_data;
if (LIST)
printf("** Section .data IP = %x\n",DataIP);
return 1;
}
//---------------------------------------------------------
case dir_code:
// if (QToken(".code") || QToken(".text"))
{
Section = SECT_code;
if (LIST)
printf("** Section .code IP = %x\n",CodeIP);
return 1;
}
//---------------------------------------------------------
case dir_ent:
{
SkipLine();
return 1;
}
//---------------------------------------------------------
case dir_end:
return 1;
//---------------------------------------------------------
case dir_stabs:
{
Parse_stabs();
//SkipLine();
return 1;
}
//---------------------------------------------------------
case dir_stabn:
{
Parse_stabn();
//SkipLine();
return 1;
}
//---------------------------------------------------------
case dir_stabd:
{
SkipLine();
return 1;
}
//---------------------------------------------------------
} // End of switch
return 0;
}
/* ParseStatement - parse a statement */
void ParseStatement(ParseContext *c, Token tkn)
{
/* dispatch on the statement keyword */
switch (tkn) {
case T_REM:
/* just a comment so ignore the rest of the line */
break;
case T_DEF:
ParseDef(c);
break;
case T_END_DEF:
ParseEndDef(c);
break;
case T_DIM:
ParseDim(c);
break;
case T_LET:
ParseLet(c);
break;
case T_IF:
ParseIf(c);
break;
case T_ELSE:
ParseElse(c);
break;
case T_ELSE_IF:
ParseElseIf(c);
break;
case T_END_IF:
ParseEndIf(c);
break;
case T_END:
ParseEnd(c);
break;
case T_FOR:
ParseFor(c);
break;
case T_NEXT:
ParseNext(c);
break;
case T_DO:
ParseDo(c);
break;
case T_DO_WHILE:
ParseDoWhile(c);
break;
case T_DO_UNTIL:
ParseDoUntil(c);
break;
case T_LOOP:
ParseLoop(c);
break;
case T_LOOP_WHILE:
ParseLoopWhile(c);
break;
case T_LOOP_UNTIL:
ParseLoopUntil(c);
break;
case T_STOP:
ParseStop(c);
break;
case T_GOTO:
ParseGoto(c);
break;
case T_RETURN:
ParseReturn(c);
break;
case T_PRINT:
ParsePrint(c);
break;
case T_IDENTIFIER:
if (SkipSpaces(c) == ':') {
DefineLabel(c, c->token, codeaddr(c));
break;
}
UngetC(c);
default:
SaveToken(c, tkn);
ParseImpliedLetOrFunctionCall(c);
break;
}
}