sysdeps/unix/sysv/linux/m68k/nptl/pt-vfork.S

   1 /* Copyright (C) 2010 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
   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 <tcb-offsets.h>
  21
  22 #define SAVE_PID \
  23         bsrl    __m68k_read_tp@PLTPC    ; /* Get the thread pointer.  */ \
  24         movel   %a0, %a1                ; /* Save TP for RESTORE_PID.  */ \
  25         movel   PID_OFFSET(%a1), %d0    ; /* Get the PID.  */ \
  26         movel   %d0, %d1                ; /* Save PID for RESTORE_PID.  */ \
  27         negl    %d0                     ; /* Negate the PID.  */ \
  28         movel   %d0, PID_OFFSET(%a1)    ; /* Store the temporary PID.  */
  29
  30 #define RESTORE_PID \
  31         tstl    %d0                     ; \
  32         beq     1f                      ; /* If we are the parent... */ \
  33         movel   %d1, PID_OFFSET(%a1)    ; /* Restore the PID.  */ \
  34 1:
  35
  36 #include <sysdeps/unix/sysv/linux/m68k/vfork.S>