freepascal.compiler/rtl/solaris/system.pp

{
    This file is part of the Free Pascal run time library.
    Copyright (c) 1999-2000 by the Free Pascal development team.

    Solaris system unit

    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

{$define FPC_IS_SYSTEM}

{$linklib m}

{ include system-independent routine headers }

{$I sysunixh.inc}

var argc:longint;
    argv:PPAnsiChar;
    envp:PPAnsiChar;

{$define FPC_SYSTEM_HAS_STACKTOP}
var
   StackTopPtr : pointer;

{$if defined(CPUARM) or defined(CPUM68K)}

{$define fpc_softfpu_interface}
{$i softfpu.pp}
{$undef fpc_softfpu_interface}

{$endif defined(CPUARM) or defined(CPUM68K)}

implementation


{$if defined(CPUARM) or defined(CPUM68K)}

{$define fpc_softfpu_implementation}
{$i softfpu.pp}
{$undef fpc_softfpu_implementation}

{ we get these functions and types from the softfpu code }
{$define FPC_SYSTEM_HAS_float64}
{$define FPC_SYSTEM_HAS_float32}
{$define FPC_SYSTEM_HAS_flag}
{$define FPC_SYSTEM_HAS_extractFloat64Frac0}
{$define FPC_SYSTEM_HAS_extractFloat64Frac1}
{$define FPC_SYSTEM_HAS_extractFloat64Exp}
{$define FPC_SYSTEM_HAS_extractFloat64Sign}
{$define FPC_SYSTEM_HAS_ExtractFloat32Frac}
{$define FPC_SYSTEM_HAS_extractFloat32Exp}
{$define FPC_SYSTEM_HAS_extractFloat32Sign}

{$endif defined(CPUARM) or defined(CPUM68K)}

{ OS independant parts}

{$I system.inc}

{*****************************************************************************
                       Misc. System Dependent Functions
*****************************************************************************}

{$i start.inc}

procedure System_exit;
begin
   Fpexit(cint(ExitCode));
End;


Function ParamCount: Longint;
Begin
  Paramcount:=argc-1
End;


function BackPos(c:AnsiChar; const s: shortstring): integer;
var
 i: integer;
Begin
  for i:=length(s) downto 0 do
    if s[i] = c then break;
  if i=0 then
    BackPos := 0
  else
    BackPos := i;
end;


 { variable where full path and filename and executable is stored }
 { is setup by the startup of the system unit.                    }
var
 execpathstr : shortstring;

function paramstr(l: longint) : shortstring;
 var
  s: shortstring;
  s1: shortstring;
 begin
   { stricly conforming POSIX applications  }
   { have the executing filename as argv[0] }
//   if l=0 then
//     begin
//       paramstr := execpathstr;
//     end
//   else
     if (l >= 0) and (l < argc) then
       paramstr:=strpas(argv[l])
     else
       paramstr:='';
 end;

Procedure Randomize;
Begin
  randseed:=longint(Fptime(nil));
End;


{*****************************************************************************
                         SystemUnit Initialization
*****************************************************************************}

function  reenable_signal(sig : longint) : boolean;
var
  e,oe : TSigSet;
  i,j : byte;
  olderrno: cint;
begin
  fillchar(e,sizeof(e),#0);
  fillchar(oe,sizeof(oe),#0);
  { set is 1 based PM }
  dec(sig);
  i:=sig mod 32;
  j:=sig div 32;
  e[j]:=1 shl i;
  { this routine is called from a signal handler, so must not change errno }
  olderrno:=geterrno;
  fpsigprocmask(SIG_UNBLOCK,@e,@oe);
  reenable_signal:=geterrno=0;
  seterrno(olderrno);
end;

{$i sighnd.inc}

procedure InstallDefaultSignalHandler(signum: longint; out oldact: SigActionRec); public name '_FPC_INSTALLDEFAULTSIGHANDLER';
var
  act: SigActionRec;
begin
  { Initialize the sigaction structure }
  { all flags and information set to zero }
  FillChar(act, sizeof(SigActionRec),0);
  { initialize handler                    }
  act.sa_handler :=@SignalToRunError;
  act.sa_flags:=SA_SIGINFO;
  FpSigAction(signum,act,oldact);
end;

var
  oldsigfpe: SigActionRec; public name '_FPC_OLDSIGFPE';
  oldsigsegv: SigActionRec; public name '_FPC_OLDSIGSEGV';
  oldsigbus: SigActionRec; public name '_FPC_OLDSIGBUS';
  oldsigill: SigActionRec; public name '_FPC_OLDSIGILL';

Procedure InstallSignals;
begin
  InstallDefaultSignalHandler(SIGFPE,oldsigfpe);
  InstallDefaultSignalHandler(SIGSEGV,oldsigsegv);
  InstallDefaultSignalHandler(SIGBUS,oldsigbus);
  InstallDefaultSignalHandler(SIGILL,oldsigill);
end;

Procedure RestoreOldSignalHandlers;
begin
  FpSigAction(SIGFPE,@oldsigfpe,nil);
  FpSigAction(SIGSEGV,@oldsigsegv,nil);
  FpSigAction(SIGBUS,@oldsigbus,nil);
  FpSigAction(SIGILL,@oldsigill,nil);
end;


procedure SetupCmdLine;
var
  bufsize,
  len,j,
  size,i : longint;
  found  : boolean;
  buf    : PAnsiChar;

  procedure AddBuf;
  begin
    reallocmem(cmdline,size+bufsize);
    move(buf^,cmdline[size],bufsize);
    inc(size,bufsize);
    bufsize:=0;
  end;

begin
  GetMem(buf,ARG_MAX);
  size:=0;
  bufsize:=0;
  i:=0;
  while (i<argc) do
   begin
     len:=strlen(argv[i]);
     if len>ARG_MAX-2 then
      len:=ARG_MAX-2;
     found:=false;
     for j:=1 to len do
      if argv[i][j]=' ' then
       begin
         found:=true;
         break;
       end;
     if bufsize+len>=ARG_MAX-2 then
      AddBuf;
     if found then
      begin
        buf[bufsize]:='"';
        inc(bufsize);
      end;
     move(argv[i]^,buf[bufsize],len);
     inc(bufsize,len);
     if found then
      begin
        buf[bufsize]:='"';
        inc(bufsize);
      end;
     if i<argc-1 then
      buf[bufsize]:=' '
     else
      buf[bufsize]:=#0;
     inc(bufsize);
     inc(i);
   end;
  AddBuf;
  FreeMem(buf,ARG_MAX);
end;


procedure SysInitStdIO;
begin
  OpenStdIO(Input,fmInput,StdInputHandle);
  OpenStdIO(Output,fmOutput,StdOutputHandle);
  OpenStdIO(ErrOutput,fmOutput,StdErrorHandle);
  OpenStdIO(StdOut,fmOutput,StdOutputHandle);
  OpenStdIO(StdErr,fmOutput,StdErrorHandle);
end;


function GetProcessID: SizeUInt;
begin
 GetProcessID := SizeUInt (fpGetPID);
end;

function CheckInitialStkLen(stklen : SizeUInt) : SizeUInt;
begin
  result := stklen;
end;

function StackTop : pointer;
begin
  if assigned(StackTopPtr) then
    StackTop:=StackTopPtr
  else
    StackTop:=StackBottom + StackLength;
end;

Begin
  IsConsole := TRUE;
  StackLength := CheckInitialStkLen(InitialStkLen);
  if assigned(StackTopPtr) then
    StackBottom:=StackTopPtr - StackLength
  else
    StackBottom := Sptr - StackLength;
  { Set up signals handlers (may be needed by init code to test cpu features) }
  InstallSignals;
{ Setup heap }
  InitHeap;
  SysInitExceptions;
{$if defined(cpui386) or defined(cpuarm)}
  fpc_cpucodeinit;
{$endif cpui386}

  initunicodestringmanager;

{ Setup stdin, stdout and stderr }
  SysInitStdIO;
{ Reset IO Error }
  InOutRes:=0;
{ Arguments }
  SetupCmdLine;
  InitSystemThreads;
  InitSystemDynLibs;
  { restore original signal handlers in case this is a library }
  if IsLibrary then
    RestoreOldSignalHandlers;
End.