diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/nptl/vfork.S')
-rw-r--r-- | sysdeps/unix/sysv/linux/arm/nptl/vfork.S | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/nptl/vfork.S b/sysdeps/unix/sysv/linux/arm/nptl/vfork.S new file mode 100644 index 0000000000..2e942beba7 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arm/nptl/vfork.S @@ -0,0 +1,36 @@ +/* Copyright (C) 2005-2014 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, see + <http://www.gnu.org/licenses/>. */ + +#include <tcb-offsets.h> + +/* Save the PID value. */ +#define SAVE_PID \ + GET_TLS (r2); \ + NEGOFF_ADJ_BASE2 (r2, r0, PID_OFFSET); /* Save the TLS addr in r2. */ \ + ldr r3, NEGOFF_OFF1 (r2, PID_OFFSET); /* Load the saved PID. */ \ + rsbs r0, r3, #0; /* Negate it. */ \ + it eq; \ + moveq r0, #0x80000000; /* Use 0x80000000 if it was 0. */ \ + str r0, NEGOFF_OFF1 (r2, PID_OFFSET); /* Store the temp PID. */ + +/* Restore the old PID value in the parent. */ +#define RESTORE_PID \ + cmp r0, #0; /* If we are the parent... */ \ + it ne; \ + strne r3, NEGOFF_OFF1 (r2, PID_OFFSET); /* restore the saved PID. */ + +#include "../vfork.S" |