diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S | 50 |
1 files changed, 16 insertions, 34 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S index a66523eab6..f5b929ea71 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S @@ -45,14 +45,8 @@ __pthread_cond_wait: cfi_lsda(DW_EH_PE_udata4, .LexceptSTART) #endif - pushq %r12 - cfi_adjust_cfa_offset(8) - cfi_rel_offset(%r12, 0) - pushq %r13 - cfi_adjust_cfa_offset(8) - cfi_rel_offset(%r13, 0) #define FRAME_SIZE 32 - subq $FRAME_SIZE, %rsp + leaq -FRAME_SIZE(%rsp), %rsp cfi_adjust_cfa_offset(FRAME_SIZE) /* Stack frame: @@ -112,7 +106,7 @@ __pthread_cond_wait: movl %edx, 4(%rsp) /* Unlock. */ -8: movl cond_futex(%rdi), %r12d +8: movl cond_futex(%rdi), %edx LOCK #if cond_lock == 0 decl (%rdi) @@ -125,9 +119,7 @@ __pthread_cond_wait: 4: callq __pthread_enable_asynccancel movl %eax, (%rsp) - movq 8(%rsp), %rdi xorq %r10, %r10 - movq %r12, %rdx cmpq $-1, dep_mutex(%rdi) leaq cond_futex(%rdi), %rdi movl $FUTEX_WAIT, %esi @@ -145,7 +137,7 @@ __pthread_cond_wait: movl $SYS_futex, %eax syscall - movl $1, %r13d + movl $1, %r8d #ifdef __ASSUME_REQUEUE_PI jmp 62f #else @@ -163,7 +155,7 @@ __pthread_cond_wait: #else orl %fs:PRIVATE_FUTEX, %esi #endif -60: xorl %r13d, %r13d +60: xorl %r8d, %r8d movl $SYS_futex, %eax syscall @@ -238,27 +230,18 @@ __pthread_cond_wait: /* If requeue_pi is used the kernel performs the locking of the mutex. */ 11: movq 16(%rsp), %rdi - testl %r13d, %r13d + testl %r8d, %r8d jnz 18f callq __pthread_mutex_cond_lock -14: addq $FRAME_SIZE, %rsp +14: leaq FRAME_SIZE(%rsp), %rsp cfi_adjust_cfa_offset(-FRAME_SIZE) - popq %r13 - cfi_adjust_cfa_offset(-8) - cfi_restore(%r13) - popq %r12 - cfi_adjust_cfa_offset(-8) - cfi_restore(%r12) - /* We return the result of the mutex_lock operation. */ retq - cfi_adjust_cfa_offset(16 + FRAME_SIZE) - cfi_rel_offset(%r12, FRAME_SIZE + 8) - cfi_rel_offset(%r13, FRAME_SIZE) + cfi_adjust_cfa_offset(FRAME_SIZE) 18: callq __pthread_mutex_cond_lock_adjust xorl %eax, %eax @@ -285,7 +268,11 @@ __pthread_cond_wait: movl $LLL_PRIVATE, %eax movl $LLL_SHARED, %esi cmovne %eax, %esi + /* The call preserves %rdx. */ callq __lll_unlock_wake +#if cond_lock != 0 + subq $cond_lock, %rdi +#endif jmp 4b /* Locking in loop failed. */ @@ -349,11 +336,7 @@ versioned_symbol (libpthread, __pthread_cond_wait, pthread_cond_wait, __condvar_cleanup1: /* Stack frame: - rsp + 48 - +--------------------------+ - rsp + 40 | %r12 | - +--------------------------+ - rsp + 32 | %r13 | + rsp + 32 +--------------------------+ rsp + 24 | unused | +--------------------------+ @@ -410,7 +393,7 @@ __condvar_cleanup1: 3: subl $(1 << nwaiters_shift), cond_nwaiters(%rdi) /* Wake up a thread which wants to destroy the condvar object. */ - xorq %r12, %r12 + xorl %ecx, %ecx cmpq $0xffffffffffffffff, total_seq(%rdi) jne 4f movl cond_nwaiters(%rdi), %eax @@ -433,7 +416,7 @@ __condvar_cleanup1: movl $SYS_futex, %eax syscall subq $cond_nwaiters, %rdi - movl $1, %r12d + movl $1, %ecx 4: LOCK #if cond_lock == 0 @@ -449,10 +432,11 @@ __condvar_cleanup1: movl $LLL_PRIVATE, %eax movl $LLL_SHARED, %esi cmovne %eax, %esi + /* The call preserves %rcx. */ callq __lll_unlock_wake /* Wake up all waiters to make sure no signal gets lost. */ -2: testq %r12, %r12 +2: testl %ecx, %ecx jnz 5f addq $cond_futex, %rdi cmpq $-1, dep_mutex-cond_futex(%rdi) @@ -474,8 +458,6 @@ __condvar_cleanup1: callq __pthread_mutex_cond_lock movq 24(%rsp), %rdi - movq 40(%rsp), %r12 - movq 32(%rsp), %r13 .LcallUR: call _Unwind_Resume@PLT hlt |