diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S index 94a24b46ee..be85ab7414 100644 --- a/nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/sh/libc-lowlevellock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2003 Free Software Foundation, Inc. +/* Copyright (C) 2003, 2007 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 @@ -16,4 +16,32 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <kernel-features.h> + +/* All locks in libc are private. Use the kernel feature if possible. */ +#define FUTEX_PRIVATE_FLAG 128 +#ifdef __ASSUME_PRIVATE_FUTEX +# define FUTEX_WAIT (0 | FUTEX_PRIVATE_FLAG) +# define FUTEX_WAKE (1 | FUTEX_PRIVATE_FLAG) +#else +# define LOAD_FUTEX_WAIT(reg,tmp) \ + stc gbr, tmp ; \ + mov.w 99f, reg ; \ + add reg, tmp ; \ + bra 98f ; \ + mov.l @tmp, reg ; \ +99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \ +98: + +# define LOAD_FUTEX_WAKE(reg,tmp) \ + stc gbr, tmp ; \ + mov.w 99f, reg ; \ + add reg, tmp ; \ + mov.l @tmp, reg ; \ + bra 98f ; \ + mov #FUTEX_WAKE, tmp ; \ +99: .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE ; \ +98: or tmp, reg +#endif + #include "lowlevellock.S" |