diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S | 34 |
1 files changed, 20 insertions, 14 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S index 9068f3ba46..755bb25896 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S @@ -30,11 +30,13 @@ # endif #endif -#define SYS_gettimeofday __NR_gettimeofday #define SYS_futex 202 #define FUTEX_WAIT 0 #define FUTEX_WAKE 1 +/* For the calculation see asm/vsyscall.h. */ +#define VSYSCALL_ADDR_vgettimeofday 0xffffffffff600000 + /* Modified: %rax, %rsi. */ .globl __lll_lock_wait @@ -49,7 +51,7 @@ __lll_lock_wait: 1: leaq -1(%rsi), %rdx /* account for the preceeded xadd. */ - movq %r10, %rsi /* movl $FUTEX_WAIT, %ecx */ + movq %r10, %rsi /* movq $FUTEX_WAIT, %rsi */ movq $SYS_futex, %rax syscall @@ -112,23 +114,26 @@ __lll_unlock_wake: .hidden __lll_timedwait_tid .align 16 __lll_timedwait_tid: - movq %rdi, %r8 - movq %rsi, %r9 + pushq %r12 + pushq %r13 + + movq %rdi, %r12 + movq %rsi, %r13 subq $16, %rsp /* Get current time. */ 2: movq %rsp, %rdi xorq %rsi, %rsi - movq $SYS_gettimeofday, %rax - syscall + movq $VSYSCALL_ADDR_vgettimeofday, %rax + callq *%rax /* Compute relative timeout. */ movq 8(%rsp), %rax movq $1000, %rdi mul %rdi /* Milli seconds to nano seconds. */ - movq (%r9), %rdi - movq 8(%r9), %rsi + movq (%r13), %rdi + movq 8(%r13), %rsi subq (%rsp), %rdi subq %rax, %rsi jns 5f @@ -140,13 +145,13 @@ __lll_timedwait_tid: movq %rdi, (%rsp) /* Store relative timeout. */ movq %rsi, 8(%rsp) - movl (%r8), %edx + movl (%r12), %edx testl %edx, %edx jz 4f movq %rsp, %r10 - xorq %rsi, %rsi /* movl $FUTEX_WAIT, %ecx */ - movq %r8, %rdi + xorq %rsi, %rsi /* movq $FUTEX_WAIT, %rsi */ + movq %r12, %rdi movq $SYS_futex, %rax syscall @@ -154,14 +159,15 @@ __lll_timedwait_tid: jne 1f 4: xorl %eax, %eax - addq $16, %rsp +8: addq $16, %rsp + popq %r13 + popq %r12 retq 1: cmpq $-ETIMEDOUT, %rax jne 2b 6: movl $ETIMEDOUT, %eax - addq $16, %rsp - retq + jmp 8b .size __lll_timedwait_tid,.-__lll_timedwait_tid #endif |