freepascal.compiler/tests/tbs/tbs0105.pp

{$ifdef go32v2}
{$define OK}
{$endif}
{$ifdef linux}
{$define OK}
{$endif}

{ Win32 signal support is still missing ! }

{$ifdef OK}

{$ifdef go32v2}
 uses dpmiexcp;
{$endif go32v2}
{$ifdef linux}
 uses linux;
{$endif linux}

  function our_sig(l : longint) : longint;{$ifdef linux}cdecl;{$endif}
    begin
       { If we land here the program works correctly !! }
       Writeln('Sigsegv signal recieved');
       our_sig:=0;
       Halt(0);
    end;

Var
 Sel: Word;
 v: pointer;
{$endif OK}
Begin
{$ifdef OK}
 Signal(SIGSEGV,signalhandler(@our_sig));
 { generate a sigsegv by writing to null-address }
 sel:=0;
 v:=nil;
{$ifdef go32v2}
  { on win9X no zero page protection :( }
  v:=pointer(-2);
{$endif go32v2}
 word(v^):=sel;
 { we should not go to here }
 Writeln('Error : signal not called');
 Halt(1);
{$endif OK}
end.