diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S index af52f2a670..21eae3a14c 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S @@ -27,9 +27,11 @@ # define #endif -#define SYS_gettimeofday __NR_gettimeofday #define SYS_futex 202 +/* For the calculation see asm/vsyscall.h. */ +#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 + .text @@ -50,9 +52,10 @@ sem_timedwait: retq /* Check whether the timeout value is valid. */ -1: subq $16, %rsp +1: pushq %r12 + pushq %r13 + subq $16, %rsp - movq %rsp, %r10 movq %rdi, %r8 movq %rsi, %r9 @@ -63,8 +66,8 @@ sem_timedwait: 7: xorq %rsi, %rsi movq %rsp, %rdi - movq $SYS_gettimeofday, %rax - syscall + movq $VSYSCALL_ADDR_vgettimeofday, %rax + callq *%rax /* Compute relative timeout. */ movq 8(%rsp), %rax @@ -84,6 +87,7 @@ sem_timedwait: movq %rdi, (%rsp) /* Store relative timeout. */ movq %rsi, 8(%rsp) + movq %rsp, %r10 movq %r8, %rdi xorq %rsi, %rsi movq $SYS_futex, %rax @@ -104,8 +108,10 @@ sem_timedwait: cmpxchgl %ecx, (%rdi) jne 8b - addq $16, %rsp xorl %eax, %eax +10: addq $16, %rsp + popq %r13 + popq %r12 retq 3: negq %rax @@ -119,7 +125,6 @@ sem_timedwait: movl %edx, (%rax) #endif - addq $16, %rsp orl $-1, %eax - retq + jmp 10b .size sem_timedwait,.-sem_timedwait |