summaryrefslogtreecommitdiff
path: root/nptl/sysdeps
diff options
context:
space:
mode:
Diffstat (limited to 'nptl/sysdeps')
-rw-r--r--nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S9
-rw-r--r--nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S18
2 files changed, 18 insertions, 9 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S
index 96ea35caac..dc65b709a1 100644
--- a/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S
+++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S
@@ -132,9 +132,8 @@ __lll_mutex_timedlock_wait:
ENTER_KERNEL
movl %eax, %ecx
-8:
+8: /* NB: %edx == 2 */
xorl %eax, %eax
- movl $2, %edx
LOCK
cmpxchgl %edx, (%ebx)
@@ -150,6 +149,12 @@ __lll_mutex_timedlock_wait:
/* Check whether the time expired. */
7: cmpl $-ETIMEDOUT, %ecx
je 5f
+
+ /* Make sure the current holder knows we are going to sleep. */
+ movl %edx, %eax
+ xchgl %eax, (%ebx)
+ testl %eax, %eax
+ jz 6b
jmp 1b
3: movl $EINVAL, %eax
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
index cf3dad18fb..6827804f7f 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S
@@ -95,7 +95,7 @@ __lll_mutex_timedlock_wait:
movq %rsp, %rdi
xorq %rsi, %rsi
movq $VSYSCALL_ADDR_vgettimeofday, %rax
- /* This is a regular function call, all calleer-save registers
+ /* This is a regular function call, all caller-save registers
might be clobbered. */
callq *%rax
@@ -132,15 +132,13 @@ __lll_mutex_timedlock_wait:
syscall
movq %rax, %rcx
- movl $1, %eax
+8: /* NB: %edx == 2 */
+ xorl %eax, %eax
LOCK
cmpxchgl %edx, (%rdi)
jnz 7f
- movl $2, (%rdi)
- xorl %eax, %eax
-
-8: addq $16, %rsp
+6: addq $16, %rsp
popq %r14
popq %r13
popq %r12
@@ -151,13 +149,19 @@ __lll_mutex_timedlock_wait:
/* Check whether the time expired. */
7: cmpq $-ETIMEDOUT, %rcx
je 5f
+
+ /* Make sure the current holder knows we are going to sleep. */
+ movl %edx, %eax
+ xchgl %eax, (%ebx)
+ testl %eax, %eax
+ jz 6b
jmp 1b
3: movl $EINVAL, %eax
retq
5: movl $ETIMEDOUT, %eax
- jmp 8b
+ jmp 6b
.size __lll_mutex_timedlock_wait,.-__lll_mutex_timedlock_wait
#endif