sysdeps/unix/sysv/linux/ia64/syscall.S

   1 /* Copyright (C) 1999-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jes Sorensen <Jes.Sorensen@cern.ch>.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20
  21 ENTRY(syscall)
  22         /* We are called like so:
  23            {out0,out1,...,out6} registers -> {NR, arg1, ..., arg6}
  24            Shift the register window so that {out1...out6} are available
  25            in {out0...out5} like the kernel syscall handler expects.  */
  26         alloc r2=ar.pfs,1,0,8,0
  27         mov r15=r32             /* syscall number */
  28         break __BREAK_SYSCALL
  29         ;;
  30         cmp.ne p6,p0=-1,r10     /* r10 = -1 on error */
  31 (p6)    ret
  32         br.cond.spnt.few __syscall_error
  33 PSEUDO_END(syscall)