osfmk/i386/commpage/pthreads.s

   1 /*
   2  * Copyright (c) 2003-2006 Apple Computer, 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
  29 #include <sys/appleapiopts.h>
  30 #include <machine/cpu_capabilities.h>
  31 #include <machine/commpage.h>
  32
  33 #define _PTHREAD_TSD_OFFSET32 0x48
  34 #define _PTHREAD_TSD_OFFSET64 0x60
  35
  36
  37 /* These routines do not need to be on the copmmpage on Intel.  They are for now
  38  * to avoid revlock, but the code should move to Libc, and we should eventually remove
  39  * these.
  40  */
  41         .text
  42         .align  2, 0x90
  43
  44 Lpthread_getspecific:
  45         movl    4(%esp), %eax
  46         movl    %gs:_PTHREAD_TSD_OFFSET32(,%eax,4), %eax
  47         ret
  48
  49         COMMPAGE_DESCRIPTOR(pthread_getspecific,_COMM_PAGE_PTHREAD_GETSPECIFIC,0,0)
  50
  51 Lpthread_self:
  52         movl    %gs:_PTHREAD_TSD_OFFSET32, %eax
  53         ret
  54
  55         COMMPAGE_DESCRIPTOR(pthread_self,_COMM_PAGE_PTHREAD_SELF,0,0)
  56
  57 /* the 64-bit versions: */
  58
  59         .code64
  60 Lpthread_getspecific_64:
  61         movq    %gs:_PTHREAD_TSD_OFFSET64(,%rdi,8), %rax
  62         ret
  63
  64         COMMPAGE_DESCRIPTOR(pthread_getspecific_64,_COMM_PAGE_PTHREAD_GETSPECIFIC,0,0)
  65
  66 Lpthread_self_64:
  67         movq    %gs:_PTHREAD_TSD_OFFSET64, %rax
  68         ret
  69
  70         COMMPAGE_DESCRIPTOR(pthread_self_64,_COMM_PAGE_PTHREAD_SELF,0,0)