libsyscall/custom/__gettimeofday.s

   1 /*
   2  * Copyright (c) 1999-2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright 1998 Apple Computer, Inc. */
  29
  30 #include "SYS.h"
  31
  32 #if defined(__ppc__) || defined(__ppc64__)
  33
  34 /* This syscall is special cased: the timeval is returned in r3/r4.
  35  * Note also that the "seconds" field of the timeval is a long, so
  36  * it's size is mode dependent.
  37  */
  38 MI_ENTRY_POINT(___gettimeofday)
  39     mr      r12,r3              // save ptr to timeval
  40     SYSCALL_NONAME(gettimeofday,0)
  41         stg     r3,0(r12)           // "stw" in 32-bit mode, "std" in 64-bit mode
  42         stw     r4,GPR_BYTES(r12)
  43         li      r3,0
  44         blr
  45
  46 #elif defined(__i386__)
  47
  48 /*
  49  *      This syscall is special cased: the timeval is returned in eax/edx.
  50  */
  51 LABEL(___gettimeofday)
  52     UNIX_SYSCALL_INT_NONAME(gettimeofday,0)
  53         mov             4(%esp),%ecx
  54         mov             %eax,(%ecx)
  55         mov             %edx,4(%ecx)
  56         xor             %eax,%eax
  57         ret
  58
  59 #elif defined(__x86_64__)
  60
  61 /*
  62  *      This syscall is special cased: the timeval is returned in rax:rdx.
  63  */
  64 LABEL(___gettimeofday)
  65     UNIX_SYSCALL_NONAME(gettimeofday,0)
  66     movq        %rax, (%rdi)
  67     movl        %edx, 8(%rdi)
  68     xorl        %eax, %eax
  69     ret
  70
  71 #else
  72 #error Unsupported architecture
  73 #endif