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 | 97 |
1 files changed, 79 insertions, 18 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S index d5c9345558..394dec8d82 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. +/* Copyright (C) 2002-2006, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -43,17 +43,25 @@ .hidden __lll_mutex_lock_wait .align 16 __lll_mutex_lock_wait: + cfi_startproc pushq %r10 + cfi_adjust_cfa_offset(8) pushq %rdx - + cfi_adjust_cfa_offset(8) + cfi_offset(%r10, -16) + cfi_offset(%rdx, -24) xorq %r10, %r10 /* No timeout. */ movl $2, %edx - movq %r10, %rsi /* movq $FUTEX_WAIT, %rsi */ +#if FUTEX_WAIT == 0 + xorl %esi, %esi +#else + movl $FUTEX_WAIT, %esi +#endif cmpl %edx, %eax /* NB: %edx == 2 */ jne 2f -1: movq $SYS_futex, %rax +1: movl $SYS_futex, %eax syscall 2: movl %edx, %eax @@ -63,8 +71,13 @@ __lll_mutex_lock_wait: jnz 1b popq %rdx + cfi_adjust_cfa_offset(-8) + cfi_restore(%rdx) popq %r10 + cfi_adjust_cfa_offset(-8) + cfi_restore(%r10) retq + cfi_endproc .size __lll_mutex_lock_wait,.-__lll_mutex_lock_wait @@ -74,18 +87,30 @@ __lll_mutex_lock_wait: .hidden __lll_mutex_timedlock_wait .align 16 __lll_mutex_timedlock_wait: + cfi_startproc /* Check for a valid timeout value. */ cmpq $1000000000, 8(%rdx) jae 3f pushq %r8 + cfi_adjust_cfa_offset(8) pushq %r9 + cfi_adjust_cfa_offset(8) pushq %r12 + cfi_adjust_cfa_offset(8) pushq %r13 + cfi_adjust_cfa_offset(8) pushq %r14 + cfi_adjust_cfa_offset(8) + cfi_offset(%r8, -16) + cfi_offset(%r9, -24) + cfi_offset(%r12, -32) + cfi_offset(%r13, -40) + cfi_offset(%r14, -48) /* Stack frame for the timespec and timeval structs. */ subq $16, %rsp + cfi_adjust_cfa_offset(16) movq %rdi, %r12 movq %rdx, %r13 @@ -93,7 +118,7 @@ __lll_mutex_timedlock_wait: 1: /* Get current time. */ movq %rsp, %rdi - xorq %rsi, %rsi + xorl %esi, %esi movq $VSYSCALL_ADDR_vgettimeofday, %rax /* This is a regular function call, all caller-save registers might be clobbered. */ @@ -101,7 +126,7 @@ __lll_mutex_timedlock_wait: /* Compute relative timeout. */ movq 8(%rsp), %rax - movq $1000, %rdi + movl $1000, %edi mul %rdi /* Milli seconds to nano seconds. */ movq (%r13), %rdi movq 8(%r13), %rsi @@ -126,26 +151,50 @@ __lll_mutex_timedlock_wait: je 8f movq %rsp, %r10 - xorq %rsi, %rsi /* movq $FUTEX_WAIT, %rsi */ +#if FUTEX_WAIT == 0 + xorl %esi, %esi +#else + movl $FUTEX_WAIT, %esi +#endif movq %r12, %rdi - movq $SYS_futex, %rax + movl $SYS_futex, %eax syscall movq %rax, %rcx 8: /* NB: %edx == 2 */ xorl %eax, %eax LOCK - cmpxchgl %edx, (%rdi) + cmpxchgl %edx, (%r12) jnz 7f 6: addq $16, %rsp + cfi_adjust_cfa_offset(-16) popq %r14 + cfi_adjust_cfa_offset(-8) + cfi_restore(%r14) popq %r13 + cfi_adjust_cfa_offset(-8) + cfi_restore(%r13) popq %r12 + cfi_adjust_cfa_offset(-8) + cfi_restore(%r12) popq %r9 + cfi_adjust_cfa_offset(-8) + cfi_restore(%r9) popq %r8 + cfi_adjust_cfa_offset(-8) + cfi_restore(%r8) retq +3: movl $EINVAL, %eax + retq + + cfi_adjust_cfa_offset(56) + cfi_offset(%r8, -16) + cfi_offset(%r9, -24) + cfi_offset(%r12, -32) + cfi_offset(%r13, -40) + cfi_offset(%r14, -48) /* Check whether the time expired. */ 7: cmpq $-ETIMEDOUT, %rcx je 5f @@ -157,11 +206,9 @@ __lll_mutex_timedlock_wait: jz 6b jmp 1b -3: movl $EINVAL, %eax - retq - 5: movl $ETIMEDOUT, %eax jmp 6b + cfi_endproc .size __lll_mutex_timedlock_wait,.-__lll_mutex_timedlock_wait #endif @@ -191,18 +238,28 @@ lll_unlock_wake_cb: .hidden __lll_mutex_unlock_wake .align 16 __lll_mutex_unlock_wake: + cfi_startproc pushq %rsi + cfi_adjust_cfa_offset(8) pushq %rdx + cfi_adjust_cfa_offset(8) + cfi_offset(%rsi, -16) + cfi_offset(%rdx, -24) movl $0, (%rdi) - movq $FUTEX_WAKE, %rsi + movl $FUTEX_WAKE, %esi movl $1, %edx /* Wake one thread. */ - movq $SYS_futex, %rax + movl $SYS_futex, %eax syscall popq %rdx + cfi_adjust_cfa_offset(-8) + cfi_restore(%rdx) popq %rsi + cfi_adjust_cfa_offset(-8) + cfi_restore(%rsi) retq + cfi_endproc .size __lll_mutex_unlock_wake,.-__lll_mutex_unlock_wake @@ -222,13 +279,13 @@ __lll_timedwait_tid: /* Get current time. */ 2: movq %rsp, %rdi - xorq %rsi, %rsi + xorl %esi, %esi movq $VSYSCALL_ADDR_vgettimeofday, %rax callq *%rax /* Compute relative timeout. */ movq 8(%rsp), %rax - movq $1000, %rdi + movl $1000, %edi mul %rdi /* Milli seconds to nano seconds. */ movq (%r13), %rdi movq 8(%r13), %rsi @@ -248,9 +305,13 @@ __lll_timedwait_tid: jz 4f movq %rsp, %r10 - xorq %rsi, %rsi /* movq $FUTEX_WAIT, %rsi */ +#if FUTEX_WAIT == 0 + xorl %esi, %esi +#else + movl $FUTEX_WAIT, %esi +#endif movq %r12, %rdi - movq $SYS_futex, %rax + movl $SYS_futex, %eax syscall cmpl $0, (%rdi) |