nptl/sysdeps/unix/sysv/linux/mips/pt-vfork.S

   1 /* Copyright (C) 2005 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 <tls.h>
  20
  21 /* Save the PID value.  */
  22 #define SAVE_PID \
  23         READ_THREAD_POINTER(v1);        /* Get the thread pointer.  */  \
  24         lw      a2, PID_OFFSET(v1);     /* Load the saved PID.  */      \
  25         subu    a2, $0, a2;             /* Negate it.  */               \
  26         sw      a2, PID_OFFSET(v1);     /* Store the temporary PID.  */
  27
  28 /* Restore the old PID value in the parent.  */
  29 #define RESTORE_PID \
  30         beqz    v0, 1f;                 /* If we are the parent... */   \
  31         READ_THREAD_POINTER(v1);        /* Get the thread pointer.  */  \
  32         lw      a2, PID_OFFSET(v1);     /* Load the saved PID.  */      \
  33         subu    a2, $0, a2;             /* Re-negate it.  */            \
  34         sw      a2, PID_OFFSET(v1);     /* Restore the PID.  */         \
  35 1:
  36
  37 #include <../sysdeps/unix/sysv/linux/mips/vfork.S>