/*
- * Copyright (c) 2003-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the
+ * License may not be used to create, or enable the creation or
+ * redistribution of, unlawful or unlicensed copies of an Apple operating
+ * system, or to circumvent, violate, or enable the circumvention or
+ * violation of, any terms of an Apple operating system software license
+ * agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
*/
#include <sys/appleapiopts.h>
#include <machine/cpu_capabilities.h>
#include <machine/commpage.h>
-#define NSEC_PER_SEC 1000*1000*1000
-#define NSEC_PER_USEC 1000
-
.text
.align 2, 0x90
Lgettimeofday:
- push %ebp
- mov %esp,%ebp
- push %esi
- push %edi
- push %ebx
-
-0:
- cmp $0,_COMM_PAGE_TIMEENABLE
- je 4f
- mov _COMM_PAGE_TIMEBASE,%esi
- mov _COMM_PAGE_TIMEBASE+4,%edi
- mov _COMM_PAGE_TIMESTAMP,%ebx
-
- mov $ _COMM_PAGE_NANOTIME,%eax
- call *%eax /* get ns in %edx:%eax */
-
- cmp _COMM_PAGE_TIMEBASE,%esi
- jne 0b
- cmp _COMM_PAGE_TIMEBASE+4,%edi
- jne 0b
- cmp $0,_COMM_PAGE_TIMEENABLE
- je 4f
-
- mov $ NSEC_PER_SEC,%ecx
- sub %esi,%eax
- sbb %edi,%edx
- div %ecx
- add %eax,%ebx
-
- mov $ NSEC_PER_USEC,%ecx
- mov %edx,%eax
- xor %edx,%edx
- div %ecx
-
- mov 8(%ebp),%ecx
- mov %ebx,(%ecx)
- mov %eax,4(%ecx)
- xor %eax,%eax
-
-3:
- pop %ebx
- pop %edi
- pop %esi
- pop %ebp
+ int $0x3
ret
-4: /* fail */
- movl $1,%eax
- jmp 3b
COMMPAGE_DESCRIPTOR(gettimeofday,_COMM_PAGE_GETTIMEOFDAY,0,0)
-
-
- .code64
- .text
- .align 2, 0x90
-
-Lgettimeofday_64: // %rdi = ptr to timeval
- pushq %rbp // set up a frame for backtraces
- movq %rsp,%rbp
- movq %rdi,%r9 // save ptr to timeval
- movq $_COMM_PAGE_32_TO_64(_COMM_PAGE_TIMEBASE),%r10
-0:
- cmpl $0,_TIMEENABLE(%r10) // is data valid? (test _COMM_PAGE_TIMEENABLE)
- jz 4f // no
- movq _TIMEBASE(%r10),%r11 // get _COMM_PAGE_TIMEBASE
- movq $_COMM_PAGE_32_TO_64(_COMM_PAGE_NANOTIME),%rax
- call *%rax // get %rax <- nanotime(), preserving %r9, %r10 and %r11
- movl _TIMESTAMP(%r10),%r8d // get _COMM_PAGE_TIMESTAMP
- cmpq _TIMEBASE(%r10),%r11 // has _COMM_PAGE_TIMEBASE changed?
- jne 0b // loop until we have consistent data
- cmpl $0,_TIMEENABLE(%r10) // is data valid? (test _COMM_PAGE_TIMEENABLE)
- jz 4f // no
-
- movl $ NSEC_PER_SEC,%ecx
- subq %r11,%rax // generate nanoseconds since timestamp
- movq %rax,%rdx
- shrq $32,%rdx // get high half of delta in %edx
- divl %ecx // %eax <- seconds since timestamp, %edx <- nanoseconds
- addl %eax,%r8d // add seconds elapsed to timestamp seconds
-
- movl $ NSEC_PER_USEC,%ecx
- movl %edx,%eax
- xorl %edx,%edx
- divl %ecx // divide residual ns by 1000 to get residual us in %eax
-
- movq %r8,(%r9) // store 64-bit seconds into timeval
- movl %eax,8(%r9) // store 32-bit useconds into timeval
- xorl %eax,%eax // return 0 for success
-3:
- popq %rbp
- ret
-4: // fail
- movl $1,%eax
- jmp 3b
-
- COMMPAGE_DESCRIPTOR(gettimeofday_64,_COMM_PAGE_GETTIMEOFDAY,0,0)
projects / apple / xnu.git / blobdiff