fpc/rtl/wince/system.pp

{
    This file is part of the Free Pascal run time library.
    Copyright (c) 1999-2005 by Florian Klaempfl and Pavel Ozerski
    and Yury Sidorov member of the Free Pascal development team.

    FPC Pascal system unit for the WinCE.

    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}
{$endif SYSTEMDEBUG}

{$define WINCE_EXCEPTION_HANDLING}

{ include system-independent routine headers }
{$I systemh.inc}

const
 LineEnding = #13#10;
 LFNSupport = true;
 DirectorySeparator = '\';
 DriveSeparator = ':';
 PathSeparator = ';';
{ FileNameCaseSensitive is defined separately below!!! }
 maxExitCode = 65535;
 MaxPathLen = 260;

const
{ Default filehandles }
  UnusedHandle    : THandle = -1;
  StdInputHandle  : THandle = 0;
  StdOutputHandle : THandle = 0;
  StdErrorHandle  : THandle = 0;

  FileNameCaseSensitive : boolean = true;
  CtrlZMarksEOF: boolean = true; (* #26 not considered as end of file *)

  sLineBreak = LineEnding;
  DefaultTextLineBreakStyle : TTextLineBreakStyle = tlbsCRLF;

  { Thread count for DLL }
  Thread_count : longint = 0;

var
{ C compatible arguments }
  argc : longint;
  argv : ppchar;
{ Win32 Info }
  hprevinst,
  HInstance,
  MainInstance,
  DLLreason,DLLparam:longint;
  Win32StackTop : Dword;

type
  TDLL_Process_Entry_Hook = function (dllparam : longint) : longbool;
  TDLL_Entry_Hook = procedure (dllparam : longint);

const
  Dll_Process_Attach_Hook : TDLL_Process_Entry_Hook = nil;
  Dll_Process_Detach_Hook : TDLL_Entry_Hook = nil;
  Dll_Thread_Attach_Hook : TDLL_Entry_Hook = nil;
  Dll_Thread_Detach_Hook : TDLL_Entry_Hook = nil;

type
  HMODULE = THandle;

{ Wrappers for some WinAPI calls }
function  CreateEvent(lpEventAttributes:pointer;bManualReset:longbool;bInitialState:longbool;lpName:pchar): THandle; stdcall;
function ResetEvent(h: THandle): LONGBOOL; stdcall;
function SetEvent(h: THandle): LONGBOOL; stdcall;
function GetCurrentProcessId:DWORD; stdcall;
function Win32GetCurrentThreadId:DWORD; stdcall;
function TlsAlloc : DWord; stdcall;
function TlsFree(dwTlsIndex : DWord) : LongBool; stdcall;

function GetFileAttributes(p : pchar) : dword; stdcall;
function DeleteFile(p : pchar) : longint; stdcall;
function MoveFile(old,_new : pchar) : longint; stdcall;
function CreateFile(lpFileName:pchar; dwDesiredAccess:DWORD; dwShareMode:DWORD;
                   lpSecurityAttributes:pointer; dwCreationDisposition:DWORD;
                   dwFlagsAndAttributes:DWORD; hTemplateFile:DWORD):longint; stdcall;

function CreateDirectory(name : pointer;sec : pointer) : longbool; stdcall;
function RemoveDirectory(name:pointer):longbool; stdcall;

implementation

{ used by wstrings.inc because wstrings.inc is included before sysos.inc
  this is put here (FK) }
(*
function SysAllocStringLen(psz:pointer;len:dword):pointer;stdcall;
 external 'oleaut32.dll' name 'SysAllocStringLen';

procedure SysFreeString(bstr:pointer);stdcall;
 external 'oleaut32.dll' name 'SysFreeString';

function SysReAllocStringLen(var bstr:pointer;psz: pointer;
  len:dword): Integer; stdcall;external 'oleaut32.dll' name 'SysReAllocStringLen';
*)

function MessageBox(w1:longint;l1,l2:PWideChar;w2:longint):longint;
   stdcall;external 'coredll' name 'MessageBoxW';

{ include system independent routines }
{$I system.inc}

{*****************************************************************************
                              ANSI <-> Wide
*****************************************************************************}
const
  { MultiByteToWideChar  }
     MB_PRECOMPOSED = 1;
     MB_COMPOSITE = 2;
     MB_ERR_INVALID_CHARS = 8;
     MB_USEGLYPHCHARS = 4;
     CP_ACP = 0;
     CP_OEMCP = 1;

function MultiByteToWideChar(CodePage:UINT; dwFlags:DWORD; lpMultiByteStr:PChar; cchMultiByte:longint; lpWideCharStr:PWideChar;cchWideChar:longint):longint;
    stdcall; external 'coredll' name 'MultiByteToWideChar';
function WideCharToMultiByte(CodePage:UINT; dwFlags:DWORD; lpWideCharStr:PWideChar; cchWideChar:longint; lpMultiByteStr:PChar;cchMultiByte:longint; lpDefaultChar:PChar; lpUsedDefaultChar:pointer):longint;
    stdcall; external 'coredll' name 'WideCharToMultiByte';

function AnsiToWideBuf(AnsiBuf: PChar; AnsiBufLen: longint; WideBuf: PWideChar; WideBufLen: longint): longint;
begin
  Result := MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, AnsiBuf, AnsiBufLen, WideBuf, WideBufLen);
end;

function WideToAnsiBuf(WideBuf: PWideChar; WideBufLen: longint; AnsiBuf: PChar; AnsiBufLen: longint): longint;
begin
  Result := WideCharToMultiByte(CP_ACP, 0, WideBuf, WideBufLen, AnsiBuf, AnsiBufLen, nil, nil);
end;

{*****************************************************************************
                      WinAPI wrappers implementation
*****************************************************************************}

function GetFileAttributesW(p : pwidechar) : dword;
    stdcall;external KernelDLL name 'GetFileAttributesW';
function DeleteFileW(p : pwidechar) : longint;
    stdcall;external KernelDLL name 'DeleteFileW';
function MoveFileW(old,_new : pwidechar) : longint;
    stdcall;external KernelDLL name 'MoveFileW';
function CreateFileW(lpFileName:pwidechar; dwDesiredAccess:DWORD; dwShareMode:DWORD;
                   lpSecurityAttributes:pointer; dwCreationDisposition:DWORD;
                   dwFlagsAndAttributes:DWORD; hTemplateFile:DWORD):longint;
 stdcall;external KernelDLL name 'CreateFileW';
function CreateDirectoryW(name : pwidechar;sec : pointer) : longbool;
 stdcall;external KernelDLL name 'CreateDirectoryW';
function RemoveDirectoryW(name:pwidechar):longbool;
 stdcall;external KernelDLL name 'RemoveDirectoryW';

function GetFileAttributes(p : pchar) : dword; stdcall;
var
  buf: array[0..MaxPathLen] of WideChar;
begin
  AnsiToWideBuf(p, -1, buf, SizeOf(buf));
  GetFileAttributes := GetFileAttributesW(buf);
end;

function DeleteFile(p : pchar) : longint; stdcall;
var
  buf: array[0..MaxPathLen] of WideChar;
begin
  AnsiToWideBuf(p, -1, buf, SizeOf(buf));
  DeleteFile := DeleteFileW(buf);
end;

function MoveFile(old,_new : pchar) : longint; stdcall;
var
  buf_old, buf_new: array[0..MaxPathLen] of WideChar;
begin
  AnsiToWideBuf(old, -1, buf_old, SizeOf(buf_old));
  AnsiToWideBuf(_new, -1, buf_new, SizeOf(buf_new));
  MoveFile := MoveFileW(buf_old, buf_new);
end;

function CreateFile(lpFileName:pchar; dwDesiredAccess:DWORD; dwShareMode:DWORD;
                   lpSecurityAttributes:pointer; dwCreationDisposition:DWORD;
                   dwFlagsAndAttributes:DWORD; hTemplateFile:DWORD):longint; stdcall;
var
  buf: array[0..MaxPathLen] of WideChar;
begin
  AnsiToWideBuf(lpFileName, -1, buf, SizeOf(buf));
  CreateFile := CreateFileW(buf, dwDesiredAccess, dwShareMode, lpSecurityAttributes,
                            dwCreationDisposition, dwFlagsAndAttributes, hTemplateFile);
end;

function CreateDirectory(name : pointer;sec : pointer) : longbool; stdcall;
var
  buf: array[0..MaxPathLen] of WideChar;
begin
  AnsiToWideBuf(name, -1, buf, SizeOf(buf));
  CreateDirectory := CreateDirectoryW(buf, sec);
end;

function RemoveDirectory(name:pointer):longbool; stdcall;
var
  buf: array[0..MaxPathLen] of WideChar;
begin
  AnsiToWideBuf(name, -1, buf, SizeOf(buf));
  RemoveDirectory := RemoveDirectoryW(buf);
end;

const
{$ifdef CPUARM}
  UserKData = $FFFFC800;
{$else CPUARM}
  UserKData = $00005800;
{$endif CPUARM}
  SYSHANDLE_OFFSET = $004;
  SYS_HANDLE_BASE	 = 64;
  SH_CURTHREAD     = 1;
  SH_CURPROC       = 2;

type
  PHandle = ^THandle;

const
  EVENT_PULSE =     1;
  EVENT_RESET =     2;
  EVENT_SET   =     3;

function CreateEventW(lpEventAttributes:pointer;bManualReset:longbool;bInitialState:longbool;lpName:PWideChar): THandle;
   stdcall; external KernelDLL name 'CreateEventW';

function CreateEvent(lpEventAttributes:pointer;bManualReset:longbool;bInitialState:longbool;lpName:pchar): THandle; stdcall;
var
  buf: array[0..MaxPathLen] of WideChar;
begin
  AnsiToWideBuf(lpName, -1, buf, SizeOf(buf));
  CreateEvent := CreateEventW(lpEventAttributes, bManualReset, bInitialState, buf);
end;

function EventModify(h: THandle; func: DWORD): LONGBOOL;
    stdcall; external KernelDLL name 'EventModify';
function TlsCall(p1, p2: DWORD): DWORD;
    stdcall; external KernelDLL name 'TlsCall';

function ResetEvent(h: THandle): LONGBOOL; stdcall;
begin
	ResetEvent := EventModify(h,EVENT_RESET);
end;

function SetEvent(h: THandle): LONGBOOL; stdcall;
begin
	SetEvent := EventModify(h,EVENT_SET);
end;

function GetCurrentProcessId:DWORD; stdcall;
var
  p: PHandle;
begin
  p:=PHandle(UserKData+SYSHANDLE_OFFSET + SH_CURPROC*SizeOf(THandle));
  GetCurrentProcessId := p^;
end;

function Win32GetCurrentThreadId:DWORD; stdcall;
var
  p: PHandle;
begin
  p:=PHandle(UserKData+SYSHANDLE_OFFSET + SH_CURTHREAD*SizeOf(THandle));
  Win32GetCurrentThreadId := p^;
end;

const
  TLS_FUNCALLOC = 0;
  TLS_FUNCFREE  = 1;

function TlsAlloc : DWord; stdcall;
begin
  TlsAlloc := TlsCall(TLS_FUNCALLOC, 0);
end;

function TlsFree(dwTlsIndex : DWord) : LongBool; stdcall;
begin
  TlsFree := LongBool(TlsCall(TLS_FUNCFREE, dwTlsIndex));
end;

{*****************************************************************************
                              Parameter Handling
*****************************************************************************}

function GetCommandLine : pwidechar;
    stdcall;external KernelDLL name 'GetCommandLineW';

var
  ModuleName : array[0..255] of char;

function GetCommandFile:pchar;
var
  buf: array[0..MaxPathLen] of WideChar;
begin
  if ModuleName[0] = #0 then begin
    GetModuleFileName(0, @buf, SizeOf(buf));
    WideToAnsiBuf(buf, -1, @ModuleName, SizeOf(ModuleName));
  end;
  GetCommandFile:=@ModuleName;
end;

procedure setup_arguments;
var
  arglen,
  count   : longint;
  argstart,
  pc,arg  : pchar;
  quote   : char;
  argvlen : longint;

  procedure allocarg(idx,len:longint);
    var
      oldargvlen : longint;
    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!                     }
      sysreallocmem(argv[idx],len+1);
    end;

begin
  { create commandline, it starts with the executed filename which is argv[0] }
  { Win32 passes the command NOT via the args, but via getmodulefilename}
  argv:=nil;
  argvlen:=0;
  pc:=getcommandfile;
  Arglen:=0;
  while pc[Arglen] <> #0 do
    Inc(Arglen);
  allocarg(0,arglen);
  move(pc^,argv[0]^,arglen+1);
  { Setup cmdline variable }
  arg:=PChar(GetCommandLine);
  count:=WideToAnsiBuf(PWideChar(arg), -1, nil, 0);
  GetMem(cmdline, arglen + count + 3);
  cmdline^:='"';
  move(pc^, (cmdline + 1)^, arglen);
  (cmdline + arglen + 1)^:='"';
  (cmdline + arglen + 2)^:=' ';
  WideToAnsiBuf(PWideChar(arg), -1, cmdline + arglen + 3, count);
  { process arguments }
  count:=0;
  pc:=cmdline;
{$IfDef SYSTEM_DEBUG_STARTUP}
  Writeln(stderr,'Win32 GetCommandLine is #',pc,'#');
{$EndIf }
  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;
 {$IfDef SYSTEM_DEBUG_STARTUP}
     Writeln(stderr,'dos arg ',count,' #',arglen,'#',argv[count],'#');
 {$EndIf SYSTEM_DEBUG_STARTUP}
     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 paramcount : longint;
begin
  paramcount := argc - 1;
end;

function paramstr(l : longint) : string;
begin
  if (l>=0) and (l<argc) then
    paramstr:=strpas(argv[l])
  else
    paramstr:='';
end;


procedure randomize;
begin
  randseed:=GetTickCount;
end;


{*****************************************************************************
                         System Dependent Exit code
*****************************************************************************}

procedure PascalMain;stdcall;external name 'PASCALMAIN';
procedure fpc_do_exit;stdcall;external name 'FPC_DO_EXIT';
Procedure ExitDLL(Exitcode : longint); forward;
procedure asm_exit(Exitcode : longint);external name 'asm_exit';

Procedure system_exit;
begin
  FreeMem(cmdline);
  { don't call ExitProcess inside
    the DLL exit code !!
    This crashes Win95 at least PM }
  if IsLibrary then
    ExitDLL(ExitCode);
  if not IsConsole then begin
    Close(stderr);
    Close(stdout);
    { what about Input and Output ?? PM }
  end;
  { call exitprocess, with cleanup as required }
  asm_exit(exitcode);
end;

var
  { value of the stack segment
    to check if the call stack can be written on exceptions }
  _SS : Cardinal;

Const
  { DllEntryPoint  }
     DLL_PROCESS_ATTACH = 1;
     DLL_THREAD_ATTACH = 2;
     DLL_PROCESS_DETACH = 0;
     DLL_THREAD_DETACH = 3;
Var
     DLLBuf : Jmp_buf;
Const
     DLLExitOK : boolean = true;

function Dll_entry : longbool;[public, alias : '_FPC_DLL_Entry'];
var
  res : longbool;

  begin
     IsLibrary:=true;
     Dll_entry:=false;
     case DLLreason of
       DLL_PROCESS_ATTACH :
         begin
           If SetJmp(DLLBuf) = 0 then
             begin
               if assigned(Dll_Process_Attach_Hook) then
                 begin
                   res:=Dll_Process_Attach_Hook(DllParam);
                   if not res then
                     exit(false);
                 end;
               PASCALMAIN;
               Dll_entry:=true;
             end
           else
             Dll_entry:=DLLExitOK;
         end;
       DLL_THREAD_ATTACH :
         begin
           inc(Thread_count);
{$warning Allocate Threadvars !}
           if assigned(Dll_Thread_Attach_Hook) then
             Dll_Thread_Attach_Hook(DllParam);
           Dll_entry:=true; { return value is ignored }
         end;
       DLL_THREAD_DETACH :
         begin
           dec(Thread_count);
           if assigned(Dll_Thread_Detach_Hook) then
             Dll_Thread_Detach_Hook(DllParam);
{$warning Release Threadvars !}
           Dll_entry:=true; { return value is ignored }
         end;
       DLL_PROCESS_DETACH :
         begin
           Dll_entry:=true; { return value is ignored }
           If SetJmp(DLLBuf) = 0 then
             begin
               FPC_DO_EXIT;
             end;
           if assigned(Dll_Process_Detach_Hook) then
             Dll_Process_Detach_Hook(DllParam);
         end;
     end;
  end;

Procedure ExitDLL(Exitcode : longint);
begin
    DLLExitOK:=ExitCode=0;
    LongJmp(DLLBuf,1);
end;

{$ifdef WINCE_EXCEPTION_HANDLING}

//
// Hardware exception handling
//

{
  Error code definitions for the Win32 API functions


  Values are 32 bit values layed out as follows:
   3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
  +---+-+-+-----------------------+-------------------------------+
  |Sev|C|R|     Facility          |               Code            |
  +---+-+-+-----------------------+-------------------------------+

  where
      Sev - is the severity code
          00 - Success
          01 - Informational
          10 - Warning
          11 - Error

      C - is the Customer code flag
      R - is a reserved bit
      Facility - is the facility code
      Code - is the facility's status code
}

const
  SEVERITY_SUCCESS        = $00000000;
  SEVERITY_INFORMATIONAL  = $40000000;
  SEVERITY_WARNING        = $80000000;
  SEVERITY_ERROR          = $C0000000;

const
  STATUS_SEGMENT_NOTIFICATION             = $40000005;
  DBG_TERMINATE_THREAD                    = $40010003;
  DBG_TERMINATE_PROCESS                   = $40010004;
  DBG_CONTROL_C                           = $40010005;
  DBG_CONTROL_BREAK                       = $40010008;

  STATUS_GUARD_PAGE_VIOLATION             = $80000001;
  STATUS_DATATYPE_MISALIGNMENT            = $80000002;
  STATUS_BREAKPOINT                       = $80000003;
  STATUS_SINGLE_STEP                      = $80000004;
  DBG_EXCEPTION_NOT_HANDLED               = $80010001;

  STATUS_ACCESS_VIOLATION                 = $C0000005;
  STATUS_IN_PAGE_ERROR                    = $C0000006;
  STATUS_INVALID_HANDLE                   = $C0000008;
  STATUS_NO_MEMORY                        = $C0000017;
  STATUS_ILLEGAL_INSTRUCTION              = $C000001D;
  STATUS_NONCONTINUABLE_EXCEPTION         = $C0000025;
  STATUS_INVALID_DISPOSITION              = $C0000026;
  STATUS_ARRAY_BOUNDS_EXCEEDED            = $C000008C;
  STATUS_FLOAT_DENORMAL_OPERAND           = $C000008D;
  STATUS_FLOAT_DIVIDE_BY_ZERO             = $C000008E;
  STATUS_FLOAT_INEXACT_RESULT             = $C000008F;
  STATUS_FLOAT_INVALID_OPERATION          = $C0000090;
  STATUS_FLOAT_OVERFLOW                   = $C0000091;
  STATUS_FLOAT_STACK_CHECK                = $C0000092;
  STATUS_FLOAT_UNDERFLOW                  = $C0000093;
  STATUS_INTEGER_DIVIDE_BY_ZERO           = $C0000094;
  STATUS_INTEGER_OVERFLOW                 = $C0000095;
  STATUS_PRIVILEGED_INSTRUCTION           = $C0000096;
  STATUS_STACK_OVERFLOW                   = $C00000FD;
  STATUS_CONTROL_C_EXIT                   = $C000013A;
  STATUS_FLOAT_MULTIPLE_FAULTS            = $C00002B4;
  STATUS_FLOAT_MULTIPLE_TRAPS             = $C00002B5;
  STATUS_REG_NAT_CONSUMPTION              = $C00002C9;

const
  ExceptionContinueExecution = 0;
  ExceptionContinueSearch = 1;
  ExceptionNestedException = 2;
  ExceptionCollidedUnwind = 3;
  ExceptionExecuteHandler = 4;

  MaxExceptionLevel = 16;
  exceptLevel : Byte = 0;

{$ifdef CPUARM}
const
  CONTEXT_ARM                     = $0000040;
  CONTEXT_CONTROL                 = CONTEXT_ARM or $00000001;
  CONTEXT_INTEGER                 = CONTEXT_ARM or $00000002;
  CONTEXT_SEGMENTS                = CONTEXT_ARM or $00000004;
  CONTEXT_FLOATING_POINT          = CONTEXT_ARM or $00000008;
  CONTEXT_DEBUG_REGISTERS         = CONTEXT_ARM or $00000010;
  CONTEXT_EXTENDED_REGISTERS      = CONTEXT_ARM or $00000020;

  CONTEXT_FULL                    = CONTEXT_CONTROL or CONTEXT_INTEGER or CONTEXT_SEGMENTS;
  
  EXCEPTION_MAXIMUM_PARAMETERS    = 15;

  NUM_VFP_REGS = 32;
  NUM_EXTRA_CONTROL_REGS = 8;

type
  PContext = ^TContext;
  TContext = record
    ContextFlags : LongWord;
// This section is specified/returned if the ContextFlags word contains
// the flag CONTEXT_INTEGER.
    R0 : LongWord;
    R1 : LongWord;
    R2 : LongWord;
    R3 : LongWord;
    R4 : LongWord;
    R5 : LongWord;
    R6 : LongWord;
    R7 : LongWord;
    R8 : LongWord;
    R9 : LongWord;
    R10 : LongWord;
    R11 : LongWord;
    R12 : LongWord;
// This section is specified/returned if the ContextFlags word contains
// the flag CONTEXT_CONTROL.
    Sp : LongWord;
    Lr : LongWord;
    Pc : LongWord;
    Psr : LongWord;
    Fpscr : LongWord;
    FpExc : LongWord;
// Floating point registers
    S : array[0..(NUM_VFP_REGS + 1)-1] of LongWord;
    FpExtra : array[0..(NUM_EXTRA_CONTROL_REGS)-1] of LongWord;
  end;
{$endif CPUARM}

{$ifdef CPUI386}
const
  CONTEXT_X86                     = $00010000;
  CONTEXT_CONTROL                 = CONTEXT_X86 or $00000001;
  CONTEXT_INTEGER                 = CONTEXT_X86 or $00000002;
  CONTEXT_SEGMENTS                = CONTEXT_X86 or $00000004;
  CONTEXT_FLOATING_POINT          = CONTEXT_X86 or $00000008;
  CONTEXT_DEBUG_REGISTERS         = CONTEXT_X86 or $00000010;
  CONTEXT_EXTENDED_REGISTERS      = CONTEXT_X86 or $00000020;
  
  MAXIMUM_SUPPORTED_EXTENSION     = 512;
  EXCEPTION_MAXIMUM_PARAMETERS    = 15;
  
type
  PFloatingSaveArea = ^TFloatingSaveArea;
  TFloatingSaveArea = packed record
    ControlWord : Cardinal;
    StatusWord : Cardinal;
    TagWord : Cardinal;
    ErrorOffset : Cardinal;
    ErrorSelector : Cardinal;
    DataOffset : Cardinal;
    DataSelector : Cardinal;
    RegisterArea : array[0..79] of Byte;
    Cr0NpxState : Cardinal;
  end;
  
  PContext = ^TContext;
  TContext = packed record
      //
      // The flags values within this flag control the contents of
      // a CONTEXT record.
      //
          ContextFlags : Cardinal;

      //
      // This section is specified/returned if CONTEXT_DEBUG_REGISTERS is
      // set in ContextFlags.  Note that CONTEXT_DEBUG_REGISTERS is NOT
      // included in CONTEXT_FULL.
      //
          Dr0, Dr1, Dr2,
          Dr3, Dr6, Dr7 : Cardinal;

      //
      // This section is specified/returned if the
      // ContextFlags word contains the flag CONTEXT_FLOATING_POINT.
      //
          FloatSave : TFloatingSaveArea;

      //
      // This section is specified/returned if the
      // ContextFlags word contains the flag CONTEXT_SEGMENTS.
      //
          SegGs, SegFs,
          SegEs, SegDs : Cardinal;

      //
      // This section is specified/returned if the
      // ContextFlags word contains the flag CONTEXT_INTEGER.
      //
          Edi, Esi, Ebx,
          Edx, Ecx, Eax : Cardinal;

      //
      // This section is specified/returned if the
      // ContextFlags word contains the flag CONTEXT_CONTROL.
      //
          Ebp : Cardinal;
          Eip : Cardinal;
          SegCs : Cardinal;
          EFlags, Esp, SegSs : Cardinal;

      //
      // This section is specified/returned if the ContextFlags word
      // contains the flag CONTEXT_EXTENDED_REGISTERS.
      // The format and contexts are processor specific
      //
          ExtendedRegisters : array[0..MAXIMUM_SUPPORTED_EXTENSION-1] of Byte;
  end;
{$endif CPUI386}

type
  PExceptionRecord = ^TExceptionRecord;
  TExceptionRecord = packed record
    ExceptionCode   : Longint;
    ExceptionFlags  : Longint;
    ExceptionRecord : PExceptionRecord;
    ExceptionAddress : Pointer;
    NumberParameters : Longint;
    ExceptionInformation : array[0..EXCEPTION_MAXIMUM_PARAMETERS-1] of Pointer;
  end;

  PExceptionPointers = ^TExceptionPointers;
  TExceptionPointers = packed record
    ExceptionRecord   : PExceptionRecord;
    ContextRecord     : PContext;
  end;

{$ifdef CPUI386}
{**************************** i386 Exception handling *****************************************}

function GetCurrentProcess:DWORD; stdcall;
begin
  GetCurrentProcess := SH_CURPROC+SYS_HANDLE_BASE;
end;

function ReadProcessMemory(process : dword;address : pointer;dest : pointer;size : dword;bytesread : pdword) :  longbool;
 stdcall;external 'coredll' name 'ReadProcessMemory';
 
function is_prefetch(p : pointer) : boolean;
var
  a : array[0..15] of byte;
  doagain : boolean;
  instrlo,instrhi,opcode : byte;
  i : longint;
begin
  result:=false;
  { read memory savely without causing another exeception }
  if not(ReadProcessMemory(GetCurrentProcess,p,@a,sizeof(a),nil)) then
    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];
        $0:
          begin
            result:=(instrlo=$f) and (a[i+1] in [$d,$18]);
            exit;
          end;
        else
          doagain:=false;
      end;
      inc(i);
    end;
end;

var
  exceptEip       : array[0..MaxExceptionLevel-1] of Longint;
  exceptError     : array[0..MaxExceptionLevel-1] of Byte;
  resetFPU        : array[0..MaxExceptionLevel-1] of Boolean;

{$ifdef SYSTEMEXCEPTIONDEBUG}
procedure DebugHandleErrorAddrFrame(error, addr, frame : longint);
begin
  if IsConsole then
    begin
      write(stderr,'HandleErrorAddrFrame(error=',error);
      write(stderr,',addr=',hexstr(addr,8));
      writeln(stderr,',frame=',hexstr(frame,8),')');
    end;
  HandleErrorAddrFrame(error,addr,frame);
end;
{$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 asm
    fninit
    fldcw   fpucw
  end;
  { 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 i386_exception_handler(ExceptionRecord: PExceptionRecord;
	    EstablisherFrame: pointer; ContextRecord: PContext;
	    DispatcherContext: pointer): longint; cdecl;
var
  res: longint;
  must_reset_fpu: boolean;
begin
  res := ExceptionContinueSearch;
  if ContextRecord^.SegSs=_SS then begin
    must_reset_fpu := true;
  {$ifdef SYSTEMEXCEPTIONDEBUG}
    if IsConsole then Writeln(stderr,'Exception  ',
            hexstr(excep^.ExceptionRecord^.ExceptionCode, 8));
  {$endif SYSTEMEXCEPTIONDEBUG}
    case cardinal(ExceptionRecord^.ExceptionCode) of
      STATUS_INTEGER_DIVIDE_BY_ZERO,
      STATUS_FLOAT_DIVIDE_BY_ZERO :
        res := 200;
      STATUS_ARRAY_BOUNDS_EXCEEDED :
        begin
          res := 201;
          must_reset_fpu := false;
        end;
      STATUS_STACK_OVERFLOW :
        begin
          res := 202;
          must_reset_fpu := false;
        end;
      STATUS_FLOAT_OVERFLOW :
        res := 205;
      STATUS_FLOAT_DENORMAL_OPERAND,
      STATUS_FLOAT_UNDERFLOW :
        res := 206;
  {excep^.ContextRecord^.FloatSave.StatusWord := excep^.ContextRecord^.FloatSave.StatusWord and $ffffff00;}
      STATUS_FLOAT_INEXACT_RESULT,
      STATUS_FLOAT_INVALID_OPERATION,
      STATUS_FLOAT_STACK_CHECK :
        res := 207;
      STATUS_INTEGER_OVERFLOW :
        begin
          res := 215;
          must_reset_fpu := false;
        end;
      STATUS_ILLEGAL_INSTRUCTION:
        res := 216;
      STATUS_ACCESS_VIOLATION:
        { Athlon prefetch bug? }
        if is_prefetch(pointer(ContextRecord^.Eip)) then
          begin
            { if yes, then retry }
            ExceptionRecord^.ExceptionCode := 0;
            res:=ExceptionContinueExecution;
          end
        else
          res := 216;

      STATUS_CONTROL_C_EXIT:
        res := 217;
      STATUS_PRIVILEGED_INSTRUCTION:
        begin
          res := 218;
          must_reset_fpu := false;
        end;
      else
        begin
          if ((ExceptionRecord^.ExceptionCode and SEVERITY_ERROR) = SEVERITY_ERROR) then
            res := 217
          else
            res := 255;
        end;
    end;
    
    if (res >= 200) and (exceptLevel < MaxExceptionLevel) then begin
      exceptEip[exceptLevel] := ContextRecord^.Eip;
      exceptError[exceptLevel] := res;
      resetFPU[exceptLevel] := must_reset_fpu;
      inc(exceptLevel);

      ContextRecord^.Eip := Longint(@JumpToHandleErrorFrame);
      ExceptionRecord^.ExceptionCode := 0;

      res := ExceptionContinueExecution;
    {$ifdef SYSTEMEXCEPTIONDEBUG}
      if IsConsole then begin
        writeln(stderr,'Exception Continue Exception set at ',
                hexstr(exceptEip[exceptLevel],8));
        writeln(stderr,'Eip changed to ',
                hexstr(longint(@JumpToHandleErrorFrame),8), ' error=', error);
      end;
    {$endif SYSTEMEXCEPTIONDEBUG}
    end;
  end;
  i386_exception_handler := res;
end;

{$endif CPUI386}

{$ifdef CPUARM}
{**************************** ARM Exception handling *****************************************}

var
  exceptPC        : array[0..MaxExceptionLevel-1] of Longint;
  exceptError     : array[0..MaxExceptionLevel-1] of Byte;

procedure JumpToHandleErrorFrame;
var
  _pc, _fp, _error : Longint;
begin
  // get original fp
  asm
    ldr r0,[r11,#-12]
    str r0,_fp
  end;
  if (exceptLevel > 0) then
    dec(exceptLevel);

  _pc:=exceptPC[exceptLevel];
  _error:=exceptError[exceptLevel];
  asm
    ldr r0,_error
    ldr r1,_pc
    ldr r2,_fp
    mov r11,r2              // Change frame pointer
    b HandleErrorAddrFrame
  end;
end;

function ARM_ExceptionHandler(ExceptionRecord: PExceptionRecord;
	    EstablisherFrame: pointer; ContextRecord: PContext;
	    DispatcherContext: pointer): longint; [public, alias : '_ARM_ExceptionHandler'];
var
  res: longint;
begin
  res := ExceptionContinueSearch;

  case cardinal(ExceptionRecord^.ExceptionCode) of
    STATUS_INTEGER_DIVIDE_BY_ZERO,
    STATUS_FLOAT_DIVIDE_BY_ZERO :
      res := 200;
    STATUS_ARRAY_BOUNDS_EXCEEDED :
      res := 201;
    STATUS_STACK_OVERFLOW :
      res := 202;
    STATUS_FLOAT_OVERFLOW :
      res := 205;
    STATUS_FLOAT_DENORMAL_OPERAND,
    STATUS_FLOAT_UNDERFLOW :
      res := 206;
    STATUS_FLOAT_INEXACT_RESULT,
    STATUS_FLOAT_INVALID_OPERATION,
    STATUS_FLOAT_STACK_CHECK :
      res := 207;
    STATUS_INTEGER_OVERFLOW :
      res := 215;
    STATUS_ILLEGAL_INSTRUCTION:
      res := 216;
    STATUS_ACCESS_VIOLATION:
      res := 216;
    STATUS_CONTROL_C_EXIT:
      res := 217;
    STATUS_PRIVILEGED_INSTRUCTION:
      res := 218;
    else
      begin
        if ((ExceptionRecord^.ExceptionCode and SEVERITY_ERROR) = SEVERITY_ERROR) then
          res := 217
        else
          res := 255;
      end;
  end;

  if (res <> ExceptionContinueSearch) and (exceptLevel < MaxExceptionLevel) then begin
    exceptPC[exceptLevel] := ContextRecord^.PC;
    exceptError[exceptLevel] := res;
    inc(exceptLevel);

    ContextRecord^.PC := Longint(@JumpToHandleErrorFrame);
    ExceptionRecord^.ExceptionCode := 0;

    res := ExceptionContinueExecution;
  {$ifdef SYSTEMEXCEPTIONDEBUG}
    if IsConsole then begin
      writeln(stderr,'Exception Continue Exception set at ',
              hexstr(exceptEip[exceptLevel],8));
      writeln(stderr,'Eip changed to ',
              hexstr(longint(@JumpToHandleErrorFrame),8), ' error=', error);
    end;
  {$endif SYSTEMEXCEPTIONDEBUG}
  end;
  ARM_ExceptionHandler := res;
end;

{$endif CPUARM}

{$endif WINCE_EXCEPTION_HANDLING}

procedure Exe_entry;[public, alias : '_FPC_EXE_Entry'];
begin
  IsLibrary:=false;
{$ifdef CPUARM}
  asm
    mov fp,#0
    bl PASCALMAIN;
  end;
{$endif CPUARM}

{$ifdef CPUI386}
  asm
  {$ifdef WINCE_EXCEPTION_HANDLING}
    pushl i386_exception_handler
    pushl %fs:(0)
    mov %esp,%fs:(0)
  {$endif WINCE_EXCEPTION_HANDLING}
    pushl %ebp
    xorl %ebp,%ebp
    movl %esp,%eax
    movl %eax,Win32StackTop
    movw %ss,%bp
    movl %ebp,_SS
    call SysResetFPU
    xorl %ebp,%ebp
    call PASCALMAIN
    popl %ebp
  {$ifdef WINCE_EXCEPTION_HANDLING}
    popl %fs:(0)
    addl $4, %esp
  {$endif WINCE_EXCEPTION_HANDLING}
  end;
{$endif CPUI386}
  { if we pass here there was no error ! }
  system_exit;
end;

{****************************************************************************
                      OS dependend widestrings
****************************************************************************}

function CharUpperBuff(lpsz:LPWSTR; cchLength:DWORD):DWORD; stdcall; external KernelDLL name 'CharUpperBuffW';
function CharLowerBuff(lpsz:LPWSTR; cchLength:DWORD):DWORD; stdcall; external KernelDLL name 'CharLowerBuffW';


function Win32WideUpper(const s : WideString) : WideString;
  begin
    result:=s;
    UniqueString(result);
    if length(result)>0 then
      CharUpperBuff(LPWSTR(result),length(result));
  end;


function Win32WideLower(const s : WideString) : WideString;
  begin
    result:=s;
    UniqueString(result);
    if length(result)>0 then
      CharLowerBuff(LPWSTR(result),length(result));
  end;


{ there is a similiar procedure in sysutils which inits the fields which
  are only relevant for the sysutils units }
procedure InitWin32Widestrings;
  begin
    widestringmanager.UpperWideStringProc:=@Win32WideUpper;
    widestringmanager.LowerWideStringProc:=@Win32WideLower;
  end;



{****************************************************************************
                    Error Message writing using messageboxes
****************************************************************************}

const
  ErrorBufferLength = 1024;
var
  ErrorBuf : array[0..ErrorBufferLength] of char;
  ErrorBufW : array[0..ErrorBufferLength] of widechar;
  ErrorLen : longint;

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
      AnsiToWideBuf(@ErrorBuf, -1, @ErrorBufW, SizeOf(ErrorBufW));
      MessageBox(0,@ErrorBufW,'Error',0);
      ErrorLen:=0;
    end;
  F.BufPos:=0;
  ErrorWrite:=0;
End;


Function ErrorClose(Var F: TextRec): Integer;
begin
  if ErrorLen>0 then
   begin
     AnsiToWideBuf(@ErrorBuf, -1, @ErrorBufW, SizeOf(ErrorBufW));
     MessageBox(0,@ErrorBufW,'Error',0);
     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;

function _getstdfilex(fd: integer): pointer; cdecl; external 'coredll';
function _fileno(fd: pointer): THandle; cdecl; external 'coredll';

procedure SysInitStdIO;
begin
  { Setup stdin, stdout and stderr, for GUI apps redirect stderr,stdout to be
    displayed in and messagebox }
  StdInputHandle:=_fileno(_getstdfilex(0));
  StdOutputHandle:=_fileno(_getstdfilex(1));
  StdErrorHandle:=_fileno(_getstdfilex(3));
  
  if not IsConsole then begin
    AssignError(stderr);
    AssignError(stdout);
    Assign(Output,'');
    Assign(Input,'');
    Assign(ErrOutput,'');
  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;

(* ProcessID cached to avoid repeated calls to GetCurrentProcess. *)

var
  ProcessID: SizeUInt;

function GetProcessID: SizeUInt;
begin
 GetProcessID := ProcessID;
end;

procedure GetLibraryInstance;
var
  buf: array[0..MaxPathLen] of WideChar;
begin
  GetModuleFileName(0, @buf, SizeOf(buf));
  HInstance:=GetModuleHandle(@buf);
end;

const
   Exe_entry_code : pointer = @Exe_entry;
   Dll_entry_code : pointer = @Dll_entry;

begin
  StackLength := InitialStkLen;
  StackBottom := Sptr - StackLength;
  { some misc stuff }
  hprevinst:=0;
  if not IsLibrary then
    GetLibraryInstance;
  MainInstance:=HInstance;
  { Setup heap }
  InitHeap;
  SysInitExceptions;
  SysInitStdIO;
  { Arguments }
  setup_arguments;
  { Reset IO Error }
  InOutRes:=0;
  ProcessID := GetCurrentProcessID;
  { threading }
  InitSystemThreads;
  { Reset internal error variable }
  errno:=0;
  initvariantmanager;
  initwidestringmanager;
  InitWin32Widestrings
end.