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

   1 /* Copyright (C) 2004 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <sysdep.h>
  21 #include <tcb-offsets.h>
  22
  23         .text
  24         .globl  __syscall_error
  25 ENTRY(__vfork)
  26         ld      [%g7 + PID], %o5
  27         sethi   %hi(0x80000000), %o3
  28         cmp     %o5, 0
  29         sub     %g0, %o5, %o4
  30         move    %icc, %o3, %o4
  31         st      %o4, [%g7 + PID]
  32
  33         LOADSYSCALL(vfork)
  34         ta      0x6d
  35         bcc,pt  %xcc, 2f
  36          mov    %o7, %g1
  37         st      %o5, [%g7 + PID]
  38         call    __syscall_error
  39          mov    %g1, %o7
  40 2:      sub     %o1, 1, %o1
  41         andcc   %o0, %o1, %o0
  42         bne,a,pt %icc, 1f
  43          st     %o5, [%g7 + PID]
  44 1:      retl
  45          nop
  46 END(__vfork)
  47
  48 libc_hidden_def (__vfork)
  49 weak_alias (__vfork, vfork)