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

   1 /* Copyright (C) 1999, 2000 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 ENTRY (__libc_pipe)
  22         mov     #+__NR_pipe, r3
  23         trapa   #0x10
  24         mov     r0, r3
  25         mov     #-12, r2
  26         shad    r2, r3
  27         not     r3, r3                  // r1=0 means r0 = -1 to -4095
  28         tst     r3, r3                  // i.e. error in linux
  29         bf      1f
  30         mov.l   .L2, r1
  31 #ifdef SHARED
  32         mov     r0, r4
  33         mov.l   r12, @-r15
  34         sts.l   pr, @-r15
  35         mov.l   0f, r12
  36         mova    0f, r0
  37         add     r0, r12
  38         mova    .L2, r0
  39         add     r0, r1
  40         jsr     @r1
  41          nop
  42         lds.l   @r15+, pr
  43         rts
  44          mov.l  @r15+, r12
  45         .align 2
  46 0:
  47         .long   _GLOBAL_OFFSET_TABLE_
  48 #else
  49         jmp     @r1
  50          mov    r0, r4
  51 #endif
  52 1:
  53         mov.l   r0, @r4
  54         mov.l   r1, @(4, r4)
  55         rts
  56          mov    #0, r0
  57         .align  2
  58 .L2:
  59         .long   PLTJMP(C_SYMBOL_NAME(__syscall_error))
  60 PSEUDO_END (__libc_pipe)
  61
  62 weak_alias (__libc_pipe, __pipe)
  63 weak_alias (__libc_pipe, pipe)