diff options
author | Austin Foxley <austinf@cetoncorp.com> | 2009-10-17 12:26:24 -0700 |
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committer | Austin Foxley <austinf@cetoncorp.com> | 2009-10-17 12:26:24 -0700 |
commit | c68d0fa2d88fc2134a38d99e7e944828384a7671 (patch) | |
tree | 6596943bd1c77f18d6e49d4153ddd3f3d67b49f5 /libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S | |
parent | 9a03e98a3b418f33c347a6023e9320f3a42cb9e4 (diff) |
libpthread/nptl: core of the "Native Posix Threading Library" for uClibc
targetting arm,sh,i386,mips,sparc for now
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S')
-rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S new file mode 100644 index 000000000..dc7fb2ec4 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S @@ -0,0 +1,38 @@ +/* Copyright (C) 1999, 2002, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <tcb-offsets.h> + +/* Save the PID value. */ +#define SAVE_PID \ + movl %gs:PID, %edx; \ + movl %edx, %eax; \ + negl %eax; \ + jne 1f; \ + movl $0x80000000, %eax; \ +1: movl %eax, %gs:PID + +/* Restore the old PID value in the parent. */ +#define RESTORE_PID \ + testl %eax, %eax; \ + je 1f; \ + movl %edx, %gs:PID; \ +1: + + +#include <libc/sysdeps/linux/i386/vfork.S> |