sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S

   1 /* Copyright (C) 2004-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
   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 #include <tcb-offsets.h>
  21
  22         .text
  23         .globl  __syscall_error
  24 ENTRY(__vfork)
  25         ld      [%g7 + PID], %o5
  26         sethi   %hi(0x80000000), %o3
  27         cmp     %o5, 0
  28         sub     %g0, %o5, %o4
  29         move    %icc, %o3, %o4
  30         st      %o4, [%g7 + PID]
  31
  32         LOADSYSCALL(vfork)
  33         ta      0x6d
  34         bcc,pt  %xcc, 2f
  35          mov    %o7, %g1
  36         st      %o5, [%g7 + PID]
  37         call    __syscall_error
  38          mov    %g1, %o7
  39 2:      sub     %o1, 1, %o1
  40         andcc   %o0, %o1, %o0
  41         bne,a,pt %icc, 1f
  42          st     %o5, [%g7 + PID]
  43 1:      retl
  44          nop
  45 END(__vfork)
  46
  47 libc_hidden_def (__vfork)
  48 weak_alias (__vfork, vfork)
  49 strong_alias (__vfork, __libc_vfork)