fpc/rtl/bsd/i386/syscall.inc

{
    $Id$
    Copyright (c) 2002 by Marco van de Voort

    Syscall functions for i386 *BSD.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    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.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 ****************************************************************************

These functions are the same over all three BSDs, except that some have a 
32-bit Errno, and some a 16-bit}

{$ifdef NetBSD}
 {$UNDEF ErrnoWord}
{$endif}
{$ifdef FreeBSD}
 {$DEFINE ErrnoWord}
{$endif}

procedure actualsyscall; assembler; {inline requires a dummy push IIRC}
    asm
         int $0x80
         jb .LErrorcode
         xor %ebx,%ebx
         ret
.LErrorcode:
	 mov %eax,%ebx
         mov $-1,%eax
   end;

function Do_SysCall(sysnr:LONGINT):longint; assembler;

asm
  movl  sysnr,%eax
  call  actualsyscall
{$ifdef ErrnoWord}
  movw  %bx,Errno
{$else}
  movl %ebx,Errno
{$endif}
end;

function Do_SysCall(sysnr,param1:longint):longint; assembler;

 asm
  movl  sysnr,%eax
  pushl Param1
  call  actualsyscall
  addl  $4,%esp
{$ifdef ErrnoWord}
  movw  %bx,Errno
{$else}
  movl %ebx,Errno
{$endif}
 end;

function Do_SysCall(sysnr,param1:integer):longint; assembler;

 asm
  movl  sysnr,%eax
  pushw Param1
  call  actualsyscall
  add   $2,%esp
{$ifdef ErrnoWord}
  movw  %bx,Errno
{$else}
  movl %ebx,Errno
{$endif}
 end;

function Do_SysCall(sysnr,param1,param2:LONGINT):longint; assembler;

 asm
   movl  sysnr,%eax
   pushl param2
   pushl Param1
   call  actualsyscall
   addl  $8,%esp
{$ifdef ErrnoWord}
  movw  %bx,Errno
{$else}
  movl %ebx,Errno
{$endif}
 end;

function Do_SysCall(sysnr,param1,param2,param3:LONGINT):longint; assembler;

 asm
   movl  sysnr,%eax
   pushl param3
   pushl param2
   pushl Param1
   call  actualsyscall
   addl  $12,%esp
{$ifdef ErrnoWord}
  movw  %bx,Errno
{$else}
  movl %ebx,Errno
{$endif}
end;

function Do_SysCall(sysnr,param1,param2,param3,param4:LONGINT):longint; assembler;

asm
   movl  sysnr,%eax
   pushl param4
   pushl param3
   pushl param2
   pushl Param1
   call  actualsyscall
   addl  $16,%esp
{$ifdef ErrnoWord}
  movw  %bx,Errno
{$else}
  movl %ebx,Errno
{$endif}
end;


function Do_SysCall(sysnr,param1,param2,param3,param4,param5:LONGINT):longint;  assembler;

 asm
   movl  sysnr,%eax
   pushl param5
   pushl param4
   pushl param3
   pushl param2
   pushl Param1
   call  actualsyscall
   addl  $20,%esp
{$ifdef ErrnoWord}
  movw  %bx,Errno
{$else}
  movl %ebx,Errno
{$endif}
end;

function Do_SysCall(sysnr,param1,param2,param3,param4,param5,param6:LONGINT):longint;  assembler;

asm
   movl  sysnr,%eax
   pushl param6
   pushl param5
   pushl param4
   pushl param3
   pushl param2
   pushl Param1
   call  actualsyscall
   addl  $24,%esp
{$ifdef ErrnoWord}
  movw  %bx,Errno
{$else}
  movl %ebx,Errno
{$endif}
end;

function Do_SysCall(sysnr,param1,param2,param3,param4,param5,param6,param7:LONGINT):longint;  assembler;

asm
   movl  sysnr,%eax
   pushl param7
   pushl param6
   pushl param5
   pushl param4
   pushl param3
   pushl param2
   pushl Param1
   call  actualsyscall
   addl  $28,%esp
{$ifdef ErrnoWord}
  movw  %bx,Errno
{$else}
  movl %ebx,Errno
{$endif}
end;