sysdeps/unix/sysv/linux/sh/pipe.S

   1 /* Copyright (C) 1999-2020 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, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <sysdep.h>
  19
  20 ENTRY (__libc_pipe)
  21         mov     #+__NR_pipe, r3
  22         trapa   #0x10
  23         mov     r0, r3
  24         mov     #-12, r2
  25         shad    r2, r3
  26         not     r3, r3                  // r1=0 means r0 = -1 to -4095
  27         tst     r3, r3                  // i.e. error in linux
  28         bt      1f
  29         mov.l   r0, @r4
  30         mov.l   r1, @(4, r4)
  31         rts
  32          mov    #0, r0
  33 1:
  34         SYSCALL_ERROR_HANDLER
  35 .Lpseudo_end:
  36         rts
  37          nop
  38 PSEUDO_END (__libc_pipe)
  39
  40 weak_alias (__libc_pipe, __pipe)
  41 libc_hidden_def (__pipe)
  42 weak_alias (__libc_pipe, pipe)