sysdeps/unix/sysv/linux/m68k/syscall.S

   1 /* Copyright (C) 1996, 1998 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <sysdep.h>
  20
  21 /* Please consult the file sysdeps/unix/sysv/linux/m68k/sysdep.h for
  22    more information about the value -4095 used below.*/
  23
  24         .text
  25 ENTRY (syscall)
  26         move.l 4(%sp), %d0      /* Load syscall number.  */
  27         _DOARGS_5 (24)          /* Frob arguments.  */
  28         trap &0                 /* Do the system call.  */
  29         UNDOARGS_5              /* Unfrob arguments.  */
  30         cmp.l &-4095, %d0       /* Check %d0 for error.  */
  31         jcc SYSCALL_ERROR_LABEL /* Jump to error handler if negative.  */
  32         rts                     /* Return to caller.  */
  33 PSEUDO_END (syscall)