diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S index 3b0b66d436..b10903bcd7 100644 --- a/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/sh/lowlevellock.S @@ -24,8 +24,24 @@ #define SYS_gettimeofday __NR_gettimeofday #define SYS_futex 240 -#define FUTEX_WAIT 0 -#define FUTEX_WAKE 1 +#ifndef FUTEX_WAIT +# define FUTEX_WAIT 0 +# define FUTEX_WAKE 1 +#endif + +#ifndef LOAD_FUTEX_WAIT +# if FUTEX_WAIT == 0 +# define LOAD_FUTEX_WAIT(reg,tmp) \ + xor reg, reg +# else +# define LOAD_FUTEX_WAIT(reg,tmp) \ + mov #FUTEX_WAIT, reg; \ + extu.b reg, reg +# endif +# define LOAD_FUTEX_WAKE(reg,tmp) \ + mov #FUTEX_WAKE, reg; \ + extu.b reg, reg +#endif .globl __lll_mutex_lock_wait @@ -40,7 +56,7 @@ __lll_mutex_lock_wait: mov r4, r6 mov r5, r8 mov #0, r7 /* No timeout. */ - mov #FUTEX_WAIT, r5 + LOAD_FUTEX_WAIT (r5, r0) mov #2, r4 cmp/eq r4, r6 @@ -133,7 +149,7 @@ __lll_mutex_timedlock_wait: bt 8f mov r8, r4 - mov #FUTEX_WAIT, r5 + LOAD_FUTEX_WAIT (r5, r0) mov r10, r6 mov r15, r7 mov #SYS_futex, r3 @@ -192,7 +208,7 @@ __lll_mutex_timedlock_wait: .align 5 cfi_startproc __lll_mutex_unlock_wake: - mov #FUTEX_WAKE, r5 + LOAD_FUTEX_WAKE (r5, r0) mov #1, r6 /* Wake one thread. */ mov #0, r7 mov.l r7, @r4 /* Stores 0. */ @@ -261,7 +277,10 @@ __lll_timedwait_tid: bt 4f mov r8, r4 - mov #FUTEX_WAIT, r5 + /* XXX The kernel so far uses global futex for the wakeup at + all times. */ + mov #0, r5 + extu.b r5, r5 mov r2, r6 mov r15, r7 mov #SYS_futex, r3 |