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fpc/rtl/os2/system.pas

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{
****************************************************************************
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2005 by Free Pascal development team
Free Pascal - OS/2 runtime library
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
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.
****************************************************************************}
unit system;
interface
{$ifdef SYSTEMDEBUG}
{$define SYSTEMEXCEPTIONDEBUG}
{.$define IODEBUG}
{.$define DEBUGENVIRONMENT}
{.$define DEBUGARGUMENTS}
{$endif SYSTEMDEBUG}
{$DEFINE OS2EXCEPTIONS}
{$define DISABLE_NO_THREAD_MANAGER}
{$I systemh.inc}
const
LineEnding = #13#10;
{ LFNSupport is defined separately below!!! }
DirectorySeparator = '\';
DriveSeparator = ':';
ExtensionSeparator = '.';
PathSeparator = ';';
AllowDirectorySeparators : set of char = ['\','/'];
AllowDriveSeparators : set of char = [':'];
{ FileNameCaseSensitive is defined separately below!!! }
MaxExitCode = 65535;
MaxPathLen = 256;
AllFilesMask = '*';
type Tos=(osDOS,osOS2,osDPMI);
const OS_Mode: Tos = osOS2;
First_Meg: pointer = nil;
const UnusedHandle=-1;
StdInputHandle=0;
StdOutputHandle=1;
StdErrorHandle=2;
LFNSupport: boolean = true;
FileNameCaseSensitive: boolean = false;
CtrlZMarksEOF: boolean = true; (* #26 is considered as end of file *)
sLineBreak = LineEnding;
DefaultTextLineBreakStyle : TTextLineBreakStyle = tlbsCRLF;
var
{ C-compatible arguments and environment }
argc : longint;
argv : ppchar;
envp : ppchar;
EnvC: cardinal;
(* Pointer to the block of environment variables - used e.g. in unit Dos. *)
Environment: PChar;
var
(* Type / run mode of the current process: *)
(* 0 .. full screen OS/2 session *)
(* 1 .. DOS session *)
(* 2 .. VIO windowable OS/2 session *)
(* 3 .. Presentation Manager OS/2 session *)
(* 4 .. detached (background) OS/2 process *)
ApplicationType: cardinal;
const
HeapAllocFlags: cardinal = $53; (* Compatible to VP/2 *)
(* mfPag_Commit or mfObj_Tile or mfPag_Write or mfPag_Read *)
function ReadUseHighMem: boolean;
procedure WriteUseHighMem (B: boolean);
(* Is allocation of memory above 512 MB address limit allowed? Initialized *)
(* during initialization of system unit according to capabilities of the *)
(* underlying OS/2 version, can be overridden by user - heap is allocated *)
(* for all threads, so the setting isn't declared as a threadvar and *)
(* should be only changed at the beginning of the main thread if needed. *)
property
UseHighMem: boolean read ReadUseHighMem write WriteUseHighMem;
(* UseHighMem is provided for compatibility with 2.0.x. *)
const
(* Are file sizes > 2 GB (64-bit) supported on the current system? *)
FSApi64: boolean = false;
procedure SetDefaultOS2FileType (FType: ShortString);
procedure SetDefaultOS2Creator (Creator: ShortString);
type
TDosOpenL = function (FileName: PChar; var Handle: THandle;
var Action: cardinal; InitSize: int64;
Attrib, OpenFlags, FileMode: cardinal;
EA: pointer): cardinal; cdecl;
TDosSetFilePtrL = function (Handle: THandle; Pos: int64; Method: cardinal;
var PosActual: int64): cardinal; cdecl;
TDosSetFileSizeL = function (Handle: THandle; Size: int64): cardinal; cdecl;
function DummyDosOpenL (FileName: PChar; var Handle: THandle;
var Action: cardinal; InitSize: int64;
Attrib, OpenFlags, FileMode: cardinal;
EA: pointer): cardinal; cdecl;
function DummyDosSetFilePtrL (Handle: THandle; Pos: int64; Method: cardinal;
var PosActual: int64): cardinal; cdecl;
function DummyDosSetFileSizeL (Handle: THandle; Size: int64): cardinal; cdecl;
const
Sys_DosOpenL: TDosOpenL = @DummyDosOpenL;
Sys_DosSetFilePtrL: TDosSetFilePtrL = @DummyDosSetFilePtrL;
Sys_DosSetFileSizeL: TDosSetFileSizeL = @DummyDosSetFileSizeL;
implementation
{*****************************************************************************
System unit initialization.
****************************************************************************}
{$I system.inc}
{*****************************************************************************
Exception handling.
****************************************************************************}
{$IFDEF OS2EXCEPTIONS}
var
{ value of the stack segment
to check if the call stack can be written on exceptions }
_SS : Cardinal;
function Is_Prefetch (P: pointer): boolean;
var
A: array [0..15] of byte;
DoAgain: boolean;
InstrLo, InstrHi, OpCode: byte;
I: longint;
MemSize, MemAttrs: cardinal;
begin
Is_Prefetch := false;
MemSize := SizeOf (A);
if (DosQueryMem (P, MemSize, MemAttrs) = 0) and
(MemAttrs and (mfPag_Free or mfPag_Commit) <> 0)
and (MemSize >= SizeOf (A)) then
Move (P^, A [0], SizeOf (A))
else
Exit;
I := 0;
DoAgain := true;
while DoAgain and (I < 15) do
begin
OpCode := A [I];
InstrLo := OpCode and $f;
InstrHi := OpCode and $f0;
case InstrHi of
{ prefix? }
$20, $30:
DoAgain := (InstrLo and 7) = 6;
$60:
DoAgain := (InstrLo and $c) = 4;
$f0:
DoAgain := InstrLo in [0, 2, 3];
$0:
begin
Is_Prefetch := (InstrLo = $f) and (A [I + 1] in [$D, $18]);
Exit;
end;
else
DoAgain := false;
end;
Inc (I);
end;
end;
const
MaxExceptionLevel = 16;
ExceptLevel: byte = 0;
var
ExceptEIP: array [0..MaxExceptionLevel - 1] of longint;
ExceptError: array [0..MaxExceptionLevel - 1] of byte;
ResetFPU: array [0..MaxExceptionLevel - 1] of boolean;
{$ifdef SYSTEMEXCEPTIONDEBUG}
procedure DebugHandleErrorAddrFrame (Error: longint; Addr, Frame: pointer);
begin
if IsConsole then
begin
Write (StdErr, ' HandleErrorAddrFrame (error = ', Error);
Write (StdErr, ', addr = ', hexstr (PtrUInt (Addr), 8));
WriteLn (StdErr, ', frame = ', hexstr (PtrUInt (Frame), 8), ')');
end;
HandleErrorAddrFrame (Error, Addr, Frame);
end;
{$endif SYSTEMEXCEPTIONDEBUG}
procedure JumpToHandleErrorFrame;
var
EIP, EBP, Error: longint;
begin
(* save ebp *)
asm
movl (%ebp),%eax
movl %eax,ebp
end;
if (ExceptLevel > 0) then
Dec (ExceptLevel);
EIP := ExceptEIP [ExceptLevel];
Error := ExceptError [ExceptLevel];
{$ifdef SYSTEMEXCEPTIONDEBUG}
if IsConsole then
WriteLn (StdErr, 'In JumpToHandleErrorFrame error = ', Error);
{$endif SYSTEMEXCEPTIONDEBUG}
if ResetFPU [ExceptLevel] then
SysResetFPU;
{ build a fake stack }
asm
{$ifdef REGCALL}
movl ebp,%ecx
movl eip,%edx
movl error,%eax
pushl eip
movl ebp,%ebp // Change frame pointer
{$else}
movl ebp,%eax
pushl %eax
movl eip,%eax
pushl %eax
movl error,%eax
pushl %eax
movl eip,%eax
pushl %eax
movl ebp,%ebp // Change frame pointer
{$endif}
{$ifdef SYSTEMEXCEPTIONDEBUG}
jmpl DebugHandleErrorAddrFrame
{$else not SYSTEMEXCEPTIONDEBUG}
jmpl HandleErrorAddrFrame
{$endif SYSTEMEXCEPTIONDEBUG}
end;
end;
function System_Exception_Handler (Report: PExceptionReportRecord;
RegRec: PExceptionRegistrationRecord;
Context: PContextRecord;
DispContext: pointer): cardinal; cdecl;
var
Res: cardinal;
Err: byte;
Must_Reset_FPU: boolean;
{$IFDEF SYSTEMEXCEPTIONDEBUG}
CurSS: cardinal;
B: byte;
{$ENDIF SYSTEMEXCEPTIONDEBUG}
begin
{$ifdef SYSTEMEXCEPTIONDEBUG}
if IsConsole then
begin
asm
xorl %eax,%eax
movw %ss,%ax
movl %eax,CurSS
end;
WriteLn (StdErr, 'In System_Exception_Handler, error = ',
HexStr (Report^.Exception_Num, 8));
WriteLn (StdErr, 'Context SS = ', HexStr (Context^.Reg_SS, 8),
', current SS = ', HexStr (CurSS, 8));
end;
{$endif SYSTEMEXCEPTIONDEBUG}
Res := Xcpt_Continue_Search;
if Context^.Reg_SS = _SS then
begin
Err := 0;
Must_Reset_FPU := true;
{$ifdef SYSTEMEXCEPTIONDEBUG}
if IsConsole then
Writeln (StdErr, 'Exception ', HexStr (Report^.Exception_Num, 8));
{$endif SYSTEMEXCEPTIONDEBUG}
case Report^.Exception_Num of
Xcpt_Integer_Divide_By_Zero,
Xcpt_Float_Divide_By_Zero:
Err := 200;
Xcpt_Array_Bounds_Exceeded:
begin
Err := 201;
Must_Reset_FPU := false;
end;
Xcpt_Unable_To_Grow_Stack:
begin
Err := 202;
Must_Reset_FPU := false;
end;
Xcpt_Float_Overflow:
Err := 205;
Xcpt_Float_Denormal_Operand,
Xcpt_Float_Underflow:
Err := 206;
{Context^.FloatSave.StatusWord := Context^.FloatSave.StatusWord and $ffffff00;}
Xcpt_Float_Inexact_Result,
Xcpt_Float_Invalid_Operation,
Xcpt_Float_Stack_Check:
Err := 207;
Xcpt_Integer_Overflow:
begin
Err := 215;
Must_Reset_FPU := false;
end;
Xcpt_Illegal_Instruction:
{ if we're testing sse support, simply set the flag and continue }
if SSE_Check then
begin
OS_Supports_SSE := false;
{ skip the offending movaps %xmm7, %xmm6 instruction }
Inc (Context^.Reg_EIP, 3);
Report^.Exception_Num := 0;
Res := Xcpt_Continue_Execution;
end
else
Err := 216;
Xcpt_Access_Violation:
{ Athlon prefetch bug? }
if Is_Prefetch (pointer (Context^.Reg_EIP)) then
begin
{ if yes, then retry }
Report^.Exception_Num := 0;
Res := Xcpt_Continue_Execution;
end
else
Err := 216;
Xcpt_Signal:
case Report^.Parameters [0] of
Xcpt_Signal_KillProc:
Err := 217;
Xcpt_Signal_Break,
Xcpt_Signal_Intr:
if Assigned (CtrlBreakHandler) then
if CtrlBreakHandler (Report^.Parameters [0] = Xcpt_Signal_Break) then
begin
{$IFDEF SYSTEMEXCEPTIONDEBUG}
WriteLn (StdErr, 'CtrlBreakHandler returned true');
{$ENDIF SYSTEMEXCEPTIONDEBUG}
Report^.Exception_Num := 0;
Res := Xcpt_Continue_Execution;
DosAcknowledgeSignalException (Report^.Parameters [0]);
end
else
Err := 217;
end;
Xcpt_Privileged_Instruction:
begin
Err := 218;
Must_Reset_FPU := false;
end;
else
begin
if ((Report^.Exception_Num and Xcpt_Severity_Code)
= Xcpt_Fatal_Exception) then
Err := 217
else
Err := 255;
end;
end;
if (Err <> 0) and (ExceptLevel < MaxExceptionLevel)
(* TH: The following line is necessary to avoid an endless loop *)
and (Report^.Exception_Num < Xcpt_Process_Terminate)
then
begin
ExceptEIP [ExceptLevel] := Context^.Reg_EIP;
ExceptError [ExceptLevel] := Err;
ResetFPU [ExceptLevel] := Must_Reset_FPU;
Inc (ExceptLevel);
Context^.Reg_EIP := cardinal (@JumpToHandleErrorFrame);
Report^.Exception_Num := 0;
Res := Xcpt_Continue_Execution;
{$ifdef SYSTEMEXCEPTIONDEBUG}
if IsConsole then
begin
WriteLn (StdErr, 'Exception Continue Exception set at ',
HexStr (ExceptEIP [ExceptLevel], 8));
WriteLn (StdErr, 'EIP changed to ',
HexStr (longint (@JumpToHandleErrorFrame), 8), ', error = ', Err);
end;
{$endif SYSTEMEXCEPTIONDEBUG}
end;
end
else
if (Report^.Exception_Num = Xcpt_Signal) and
(Report^.Parameters [0] and (Xcpt_Signal_Intr or Xcpt_Signal_Break) <> 0)
and Assigned (CtrlBreakHandler) then
{$IFDEF SYSTEMEXCEPTIONDEBUG}
begin
WriteLn (StdErr, 'XCPT_SIGNAL caught, CtrlBreakHandler assigned, Param = ',
Report^.Parameters [0]);
{$ENDIF SYSTEMEXCEPTIONDEBUG}
if CtrlBreakHandler (Report^.Parameters [0] = Xcpt_Signal_Break) then
begin
{$IFDEF SYSTEMEXCEPTIONDEBUG}
WriteLn (StdErr, 'CtrlBreakHandler returned true');
{$ENDIF SYSTEMEXCEPTIONDEBUG}
Report^.Exception_Num := 0;
Res := Xcpt_Continue_Execution;
DosAcknowledgeSignalException (Report^.Parameters [0]);
end
else
Err := 217;
{$IFDEF SYSTEMEXCEPTIONDEBUG}
end
else
if IsConsole then
begin
WriteLn (StdErr, 'Ctx flags = ', HexStr (Context^.ContextFlags, 8));
if Context^.ContextFlags and Context_Floating_Point <> 0 then
begin
for B := 1 to 6 do
Write (StdErr, 'Ctx Env [', B, '] = ', HexStr (Context^.Env [B], 8),
', ');
WriteLn (StdErr, 'Ctx Env [7] = ', HexStr (Context^.Env [7], 8));
for B := 0 to 6 do
Write (StdErr, 'FPU stack [', B, '] = ', Context^.FPUStack [B], ', ');
WriteLn (StdErr, 'FPU stack [7] = ', Context^.FPUStack [7]);
end;
if Context^.ContextFlags and Context_Segments <> 0 then
WriteLn (StdErr, 'GS = ', HexStr (Context^.Reg_GS, 8),
', FS = ', HexStr (Context^.Reg_FS, 8),
', ES = ', HexStr (Context^.Reg_ES, 8),
', DS = ', HexStr (Context^.Reg_DS, 8));
if Context^.ContextFlags and Context_Integer <> 0 then
begin
WriteLn (StdErr, 'EDI = ', HexStr (Context^.Reg_EDI, 8),
', ESI = ', HexStr (Context^.Reg_ESI, 8));
WriteLn (StdErr, 'EAX = ', HexStr (Context^.Reg_EAX, 8),
', EBX = ', HexStr (Context^.Reg_EBX, 8),
', ECX = ', HexStr (Context^.Reg_ECX, 8),
', EDX = ', HexStr (Context^.Reg_EDX, 8));
end;
if Context^.ContextFlags and Context_Control <> 0 then
begin
WriteLn (StdErr, 'EBP = ', HexStr (Context^.Reg_EBP, 8),
', SS = ', HexStr (Context^.Reg_SS, 8),
', ESP = ', HexStr (Context^.Reg_ESP, 8));
WriteLn (StdErr, 'CS = ', HexStr (Context^.Reg_CS, 8),
', EIP = ', HexStr (Context^.Reg_EIP, 8),
', EFlags = ', HexStr (Context^.Flags, 8));
end;
end;
{$endif SYSTEMEXCEPTIONDEBUG}
System_Exception_Handler := Res;
end;
var
ExcptReg: PExceptionRegistrationRecord; public name '_excptregptr';
{$ifdef SYSTEMEXCEPTIONDEBUG}
var
OldExceptAddr,
NewExceptAddr: PtrUInt;
{$endif SYSTEMEXCEPTIONDEBUG}
procedure Install_Exception_Handler;
var
T: cardinal;
begin
{$ifdef SYSTEMEXCEPTIONDEBUG}
(* ThreadInfoBlock is located at FS:[0], the first *)
(* entry is pointer to head of exception handler chain. *)
asm
movl $0,%eax
movl %fs:(%eax),%eax
movl %eax, OldExceptAddr
end;
{$endif SYSTEMEXCEPTIONDEBUG}
with ExcptReg^ do
begin
Prev_Structure := nil;
ExceptionHandler := TExceptionHandler (@System_Exception_Handler);
end;
(* Disable pop-up windows for errors and exceptions *)
DosError (deDisableExceptions);
DosSetExceptionHandler (ExcptReg^);
if IsConsole then
begin
DosSetSignalExceptionFocus (1, T);
DosAcknowledgeSignalException (Xcpt_Signal_Intr);
DosAcknowledgeSignalException (Xcpt_Signal_Break);
end;
{$ifdef SYSTEMEXCEPTIONDEBUG}
asm
movl $0,%eax
movl %fs:(%eax),%eax
movl %eax, NewExceptAddr
end;
{$endif SYSTEMEXCEPTIONDEBUG}
end;
procedure Remove_Exception_Handlers;
begin
DosUnsetExceptionHandler (ExcptReg^);
end;
{$ENDIF OS2EXCEPTIONS}
procedure system_exit;
begin
(* if IsLibrary then
ExitDLL(ExitCode);
*)
(*
if not IsConsole then
begin
Close(stderr);
Close(stdout);
Close(erroutput);
Close(Input);
Close(Output);
end;
*)
{$IFDEF OS2EXCEPTIONS}
Remove_Exception_Handlers;
{$ENDIF OS2EXCEPTIONS}
DosExit (1{process}, exitcode);
end;
{$ASMMODE ATT}
{****************************************************************************
Miscellaneous related routines.
****************************************************************************}
function paramcount:longint;assembler;
asm
movl argc,%eax
decl %eax
end {['EAX']};
function paramstr(l:longint):string;
var p:^Pchar;
begin
if (l>=0) and (l<=paramcount) then
begin
p:=argv;
paramstr:=strpas(p[l]);
end
else paramstr:='';
end;
procedure randomize;
var
dt: TSysDateTime;
begin
// Hmm... Lets use timer
DosGetDateTime(dt);
randseed:=dt.hour+(dt.minute shl 8)+(dt.second shl 16)+(dt.sec100 shl 32);
end;
{****************************************************************************
Error Message writing using messageboxes
****************************************************************************}
const
WinInitialize: TWinInitialize = nil;
WinCreateMsgQueue: TWinCreateMsgQueue = nil;
WinMessageBox: TWinMessageBox = nil;
EnvSize: cardinal = 0;
var
ErrorBuf: array [0..ErrorBufferLength] of char;
ErrorLen: longint;
PMWinHandle: cardinal;
function ErrorWrite (var F: TextRec): integer;
{
An error message should always end with #13#10#13#10
}
var
P: PChar;
I: longint;
begin
if F.BufPos > 0 then
begin
if F.BufPos + ErrorLen > ErrorBufferLength then
I := ErrorBufferLength - ErrorLen
else
I := F.BufPos;
Move (F.BufPtr^, ErrorBuf [ErrorLen], I);
Inc (ErrorLen, I);
ErrorBuf [ErrorLen] := #0;
end;
if ErrorLen > 3 then
begin
P := @ErrorBuf [ErrorLen];
for I := 1 to 4 do
begin
Dec (P);
if not (P^ in [#10, #13]) then
break;
end;
end;
if ErrorLen = ErrorBufferLength then
I := 4;
if (I = 4) then
begin
WinMessageBox (0, 0, @ErrorBuf, PChar ('Error'), 0, MBStyle);
ErrorLen := 0;
end;
F.BufPos := 0;
ErrorWrite := 0;
end;
function ErrorClose (var F: TextRec): integer;
begin
if ErrorLen > 0 then
begin
WinMessageBox (0, 0, @ErrorBuf, PChar ('Error'), 0, MBStyle);
ErrorLen := 0;
end;
ErrorLen := 0;
ErrorClose := 0;
end;
function ErrorOpen (var F: TextRec): integer;
begin
TextRec(F).InOutFunc := @ErrorWrite;
TextRec(F).FlushFunc := @ErrorWrite;
TextRec(F).CloseFunc := @ErrorClose;
ErrorOpen := 0;
end;
procedure AssignError (var T: Text);
begin
Assign (T, '');
TextRec (T).OpenFunc := @ErrorOpen;
Rewrite (T);
end;
procedure SysInitStdIO;
begin
{ Setup stdin, stdout and stderr, for GUI apps redirect stderr,stdout to be
displayed in a messagebox }
(*
StdInputHandle := longint(GetStdHandle(cardinal(STD_INPUT_HANDLE)));
StdOutputHandle := longint(GetStdHandle(cardinal(STD_OUTPUT_HANDLE)));
StdErrorHandle := longint(GetStdHandle(cardinal(STD_ERROR_HANDLE)));
if not IsConsole then
begin
if (DosLoadModule (nil, 0, 'PMWIN', PMWinHandle) = 0) and
(DosQueryProcAddr (PMWinHandle, 789, nil, pointer (WinMessageBox)) = 0)
and
(DosQueryProcAddr (PMWinHandle, 763, nil, pointer (WinInitialize)) = 0)
and
(DosQueryProcAddr (PMWinHandle, 716, nil, pointer (WinCreateMsgQueue))
= 0)
then
begin
WinInitialize (0);
WinCreateMsgQueue (0, 0);
end
else
HandleError (2);
AssignError (StdErr);
AssignError (StdOut);
Assign (Output, '');
Assign (Input, '');
end
else
begin
*)
OpenStdIO (Input, fmInput, StdInputHandle);
OpenStdIO (Output, fmOutput, StdOutputHandle);
OpenStdIO (ErrOutput, fmOutput, StdErrorHandle);
OpenStdIO (StdOut, fmOutput, StdOutputHandle);
OpenStdIO (StdErr, fmOutput, StdErrorHandle);
(*
end;
*)
end;
function strcopy(dest,source : pchar) : pchar;assembler;
var
saveeax,saveesi,saveedi : longint;
asm
movl %edi,saveedi
movl %esi,saveesi
{$ifdef REGCALL}
movl %eax,saveeax
movl %edx,%edi
{$else}
movl source,%edi
{$endif}
testl %edi,%edi
jz .LStrCopyDone
leal 3(%edi),%ecx
andl $-4,%ecx
movl %edi,%esi
subl %edi,%ecx
{$ifdef REGCALL}
movl %eax,%edi
{$else}
movl dest,%edi
{$endif}
jz .LStrCopyAligned
.LStrCopyAlignLoop:
movb (%esi),%al
incl %edi
incl %esi
testb %al,%al
movb %al,-1(%edi)
jz .LStrCopyDone
decl %ecx
jnz .LStrCopyAlignLoop
.balign 16
.LStrCopyAligned:
movl (%esi),%eax
movl %eax,%edx
leal 0x0fefefeff(%eax),%ecx
notl %edx
addl $4,%esi
andl %edx,%ecx
andl $0x080808080,%ecx
jnz .LStrCopyEndFound
movl %eax,(%edi)
addl $4,%edi
jmp .LStrCopyAligned
.LStrCopyEndFound:
testl $0x0ff,%eax
jz .LStrCopyByte
testl $0x0ff00,%eax
jz .LStrCopyWord
testl $0x0ff0000,%eax
jz .LStrCopy3Bytes
movl %eax,(%edi)
jmp .LStrCopyDone
.LStrCopy3Bytes:
xorb %dl,%dl
movw %ax,(%edi)
movb %dl,2(%edi)
jmp .LStrCopyDone
.LStrCopyWord:
movw %ax,(%edi)
jmp .LStrCopyDone
.LStrCopyByte:
movb %al,(%edi)
.LStrCopyDone:
{$ifdef REGCALL}
movl saveeax,%eax
{$else}
movl dest,%eax
{$endif}
movl saveedi,%edi
movl saveesi,%esi
end;
threadvar
DefaultCreator: ShortString;
DefaultFileType: ShortString;
procedure SetDefaultOS2FileType (FType: ShortString);
begin
{$WARNING Not implemented yet!}
DefaultFileType := FType;
end;
procedure SetDefaultOS2Creator (Creator: ShortString);
begin
{$WARNING Not implemented yet!}
DefaultCreator := Creator;
end;
procedure InitEnvironment;
var env_count : longint;
dos_env,cp : pchar;
begin
env_count:=0;
cp:=environment;
while cp ^ <> #0 do
begin
inc(env_count);
while (cp^ <> #0) do inc(longint(cp)); { skip to NUL }
inc(longint(cp)); { skip to next character }
end;
envp := sysgetmem((env_count+1) * sizeof(pchar));
envc := env_count;
if (envp = nil) then exit;
cp:=environment;
env_count:=0;
while cp^ <> #0 do
begin
envp[env_count] := sysgetmem(strlen(cp)+1);
strcopy(envp[env_count], cp);
{$IfDef DEBUGENVIRONMENT}
Writeln(stderr,'env ',env_count,' = "',envp[env_count],'"');
{$EndIf}
inc(env_count);
while (cp^ <> #0) do
inc(longint(cp)); { skip to NUL }
inc(longint(cp)); { skip to next character }
end;
envp[env_count]:=nil;
end;
var
(* Initialized by system unit initialization *)
PIB: PProcessInfoBlock;
procedure InitArguments;
var
arglen,
count : PtrInt;
argstart,
pc,arg : pchar;
quote : char;
argvlen : PtrInt;
procedure allocarg(idx,len: PtrInt);
var
oldargvlen : PtrInt;
begin
if idx>=argvlen then
begin
oldargvlen:=argvlen;
argvlen:=(idx+8) and (not 7);
sysreallocmem(argv,argvlen*sizeof(pointer));
{ fillchar(argv[oldargvlen],(argvlen-oldargvlen)*sizeof(pointer),0);}
end;
{ use realloc to reuse already existing memory }
{ always allocate, even if length is zero, since }
{ the arg. is still present! }
ArgV [Idx] := SysAllocMem (Succ (Len));
end;
begin
CmdLine := SysAllocMem (MaxPathLen);
ArgV := SysAllocMem (8 * SizeOf (pointer));
ArgLen := StrLen (PChar (PIB^.Cmd));
Inc (ArgLen);
if DosQueryModuleName (PIB^.Handle, MaxPathLen, CmdLine) = 0 then
ArgVLen := Succ (StrLen (CmdLine))
else
(* Error occurred - use program name from command line as fallback. *)
begin
Move (PIB^.Cmd^, CmdLine, ArgLen);
ArgVLen := ArgLen;
end;
{ Get ArgV [0] }
ArgV [0] := SysAllocMem (ArgVLen);
Move (CmdLine^, ArgV [0]^, ArgVLen);
Count := 1;
(* PC points to leading space after program name on command line *)
PC := PChar (PIB^.Cmd) + ArgLen;
(* ArgLen contains size of command line arguments including leading space. *)
ArgLen := Succ (StrLen (PC));
SysReallocMem (CmdLine, ArgVLen + ArgLen);
Move (PC^, CmdLine [ArgVLen], Succ (ArgLen));
(* ArgV has space for 8 parameters from the first allocation. *)
ArgVLen := 8;
{ process arguments }
while pc^<>#0 do
begin
{ skip leading spaces }
while pc^ in [#1..#32] do
inc(pc);
if pc^=#0 then
break;
{ calc argument length }
quote:=' ';
argstart:=pc;
arglen:=0;
while (pc^<>#0) do
begin
case pc^ of
#1..#32 :
begin
if quote<>' ' then
inc(arglen)
else
break;
end;
'"' :
begin
if quote<>'''' then
begin
if pchar(pc+1)^<>'"' then
begin
if quote='"' then
quote:=' '
else
quote:='"';
end
else
inc(pc);
end
else
inc(arglen);
end;
'''' :
begin
if quote<>'"' then
begin
if pchar(pc+1)^<>'''' then
begin
if quote='''' then
quote:=' '
else
quote:='''';
end
else
inc(pc);
end
else
inc(arglen);
end;
else
inc(arglen);
end;
inc(pc);
end;
{ copy argument }
{ Don't copy the first one, it is already there.}
If Count<>0 then
begin
allocarg(count,arglen);
quote:=' ';
pc:=argstart;
arg:=argv[count];
while (pc^<>#0) do
begin
case pc^ of
#1..#32 :
begin
if quote<>' ' then
begin
arg^:=pc^;
inc(arg);
end
else
break;
end;
'"' :
begin
if quote<>'''' then
begin
if pchar(pc+1)^<>'"' then
begin
if quote='"' then
quote:=' '
else
quote:='"';
end
else
inc(pc);
end
else
begin
arg^:=pc^;
inc(arg);
end;
end;
'''' :
begin
if quote<>'"' then
begin
if pchar(pc+1)^<>'''' then
begin
if quote='''' then
quote:=' '
else
quote:='''';
end
else
inc(pc);
end
else
begin
arg^:=pc^;
inc(arg);
end;
end;
else
begin
arg^:=pc^;
inc(arg);
end;
end;
inc(pc);
end;
arg^:=#0;
end;
{$IfDef DEBUGARGUMENTS}
Writeln(stderr,'dos arg ',count,' #',arglen,'#',argv[count],'#');
{$EndIf}
inc(count);
end;
{ get argc and create an nil entry }
argc:=count;
allocarg(argc,0);
{ free unused memory }
sysreallocmem(argv,(argc+1)*sizeof(pointer));
end;
function GetFileHandleCount: longint;
var L1: longint;
L2: cardinal;
begin
L1 := 0; (* Don't change the amount, just check. *)
if DosSetRelMaxFH (L1, L2) <> 0 then GetFileHandleCount := 50
else GetFileHandleCount := L2;
end;
function CheckInitialStkLen (StkLen: SizeUInt): SizeUInt;
begin
CheckInitialStkLen := StkLen;
end;
var TIB: PThreadInfoBlock;
RC: cardinal;
ErrStr: string;
P: pointer;
DosCallsHandle: THandle;
const
DosCallsName: array [0..8] of char = 'DOSCALLS'#0;
{*var}
{* ST: pointer;}
{*}
begin
{$IFDEF OS2EXCEPTIONS}
(* asm
{ allocate space for exception registration record }
pushl $0
pushl $0}
{* pushl %fs:(0)}
{ movl %esp,%fs:(0)
but don't insert it as it doesn't
point to anything yet
this will be used in signals unit }
movl %esp,%eax
movl %eax,ExcptReg
pushl %ebp
movl %esp,%eax
{* movl %eax,st*}
movl %eax,StackTop
end;
{* StackTop:=st;}
*) asm
xorl %eax,%eax
movw %ss,%ax
movl %eax,_SS
call SysResetFPU
end;
{$ENDIF OS2EXCEPTIONS}
DosGetInfoBlocks (@TIB, @PIB);
StackBottom := TIB^.Stack;
{ $IFNDEF OS2EXCEPTIONS}
StackTop := TIB^.StackLimit;
{ $ENDIF OS2EXCEPTIONS}
StackLength := CheckInitialStkLen (InitialStkLen);
{Set type of application}
ApplicationType := PIB^.ProcType;
ProcessID := PIB^.PID;
ThreadID := TIB^.TIB2^.TID;
IsConsole := ApplicationType <> 3;
ExitProc := nil;
{$IFDEF OS2EXCEPTIONS}
Install_Exception_Handler;
{$ENDIF OS2EXCEPTIONS}
(* Initialize the amount of file handles *)
FileHandleCount := GetFileHandleCount;
{Initialize the heap.}
(* Logic is following:
The heap is initially restricted to low address space (< 512 MB).
If underlying OS/2 version allows using more than 512 MB per process
(OS/2 WarpServer for e-Business, eComStation, possibly OS/2 Warp 4.0
with FP13 and above as well), use of this high memory is allowed for
future memory allocations at the end of System unit initialization.
The consequences are that the compiled application can allocate more
memory, but it must make sure to use direct DosAllocMem calls if it
needs a memory block for some system API not supporting high memory.
This is probably no problem for direct calls to these APIs, but
there might be situations when a memory block needs to be passed
to a 3rd party DLL which in turn calls such an API call. In case
of problems usage of high memory can be turned off by setting
UseHighMem to false - the program should change the setting at its
very beginning (e.g. in initialization section of the first unit
listed in the "uses" section) to avoid having preallocated memory
from the high memory region before changing value of this variable. *)
InitHeap;
if DosQueryModuleHandle (@DosCallsName [0], DosCallsHandle) = 0 then
begin
if DosQueryProcAddr (DosCallsHandle, OrdDosOpenL, nil, P) = 0 then
begin
Sys_DosOpenL := TDosOpenL (P);
if DosQueryProcAddr (DosCallsHandle, OrdDosSetFilePtrL, nil, P) = 0
then
begin
Sys_DosSetFilePtrL := TDosSetFilePtrL (P);
if DosQueryProcAddr (DosCallsHandle, OrdDosSetFileSizeL, nil,
P) = 0 then
begin
Sys_DosSetFileSizeL := TDosSetFileSizeL (P);
FSApi64 := true;
end;
end;
end;
end;
{ ... and exceptions }
SysInitExceptions;
fpc_cpucodeinit;
{ ... and I/O }
SysInitStdIO;
{ no I/O-Error }
inoutres:=0;
{Initialize environment (must be after InitHeap because allocates memory)}
Environment := pointer (PIB^.Env);
InitEnvironment;
InitArguments;
DefaultCreator := '';
DefaultFileType := '';
InitSystemThreads;
InitVariantManager;
{$ifdef HASWIDESTRING}
{$ifdef VER2_2}
InitWideStringManager;
{$else VER2_2}
InitUnicodeStringManager;
{$endif VER2_2}
{$endif HASWIDESTRING}
{$IFDEF EXTDUMPGROW}
{ Int_HeapSize := high (cardinal);}
{$ENDIF EXTDUMPGROW}
{$ifdef SYSTEMEXCEPTIONDEBUG}
if IsConsole then
WriteLn (StdErr, 'Old exception ', HexStr (OldExceptAddr, 8),
', new exception ', HexStr (NewExceptAddr, 8), ', _SS = ', HexStr (_SS, 8));
{$endif SYSTEMEXCEPTIONDEBUG}
end.
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