libsyscall/wrappers/__get_cpu_capabilities.s

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /* Get the cpu_capabilities bit vector out of the comm page */
  25
  26 #define __APPLE_API_PRIVATE
  27 #include <machine/cpu_capabilities.h>
  28 #undef  __APPLE_API_PRIVATE
  29
  30 #if defined(__x86_64__)
  31
  32         .text
  33         .align 2, 0x90
  34         .globl __get_cpu_capabilities
  35 __get_cpu_capabilities:
  36         movq    $(_COMM_PAGE_CPU_CAPABILITIES64), %rax
  37         movq    (%rax), %rax
  38         ret
  39
  40 #elif defined(__i386__)
  41
  42         .text
  43         .align 2, 0x90
  44         .globl __get_cpu_capabilities
  45 __get_cpu_capabilities:
  46         movl    _COMM_PAGE_CPU_CAPABILITIES64, %eax
  47         movl    _COMM_PAGE_CPU_CAPABILITIES64+4, %edx
  48         ret
  49
  50 #elif defined(__arm__)
  51
  52         .text
  53         .align 2
  54         .globl __get_cpu_capabilities
  55 __get_cpu_capabilities:
  56         mov     r0, #(_COMM_PAGE_CPU_CAPABILITIES & 0x000000ff)
  57         orr     r0, r0, #(_COMM_PAGE_CPU_CAPABILITIES & 0x0000ff00)
  58         orr     r0, r0, #(_COMM_PAGE_CPU_CAPABILITIES & 0x00ff0000)
  59         orr     r0, r0, #(_COMM_PAGE_CPU_CAPABILITIES & 0xff000000)
  60         ldr     r0, [r0]
  61         bx      lr
  62
  63 #elif defined(__arm64__)
  64
  65         .text
  66         .align 2
  67         .globl __get_cpu_capabilities
  68 __get_cpu_capabilities:
  69         ldr x0, Lcommpage_cc_addr
  70         ldr     w0, [x0]
  71         ret
  72 Lcommpage_cc_addr:
  73 .quad _COMM_PAGE_CPU_CAPABILITIES
  74
  75 #else
  76 #error Unsupported architecture
  77 #endif