src/pthread_asm.s

   1 /*
   2  * Copyright (c) 2012 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 #if defined(__x86_64__)
  25
  26 #include <mach/i386/syscall_sw.h>
  27
  28 #ifndef VARIANT_DYLD
  29
  30         .align 2, 0x90
  31         .globl _start_wqthread
  32 _start_wqthread:
  33         // This routine is never called directly by user code, jumped from kernel
  34         push   %rbp
  35         mov    %rsp,%rbp
  36         sub    $24,%rsp         // align the stack
  37         call   __pthread_wqthread
  38         leave
  39         ret
  40
  41         .align 2, 0x90
  42         .globl _thread_start
  43 _thread_start:
  44         // This routine is never called directly by user code, jumped from kernel
  45         push   %rbp
  46         mov    %rsp,%rbp
  47         sub    $24,%rsp         // align the stack
  48         call   __pthread_start
  49         leave
  50         ret
  51
  52 #endif
  53
  54 #elif defined(__i386__)
  55
  56 #include <mach/i386/syscall_sw.h>
  57
  58 #ifndef VARIANT_DYLD
  59
  60         .align 2, 0x90
  61         .globl _start_wqthread
  62 _start_wqthread:
  63         // This routine is never called directly by user code, jumped from kernel
  64         push   %ebp
  65         mov    %esp,%ebp
  66         sub    $28,%esp         // align the stack
  67         mov    %esi,20(%esp)    //arg5
  68         mov    %edi,16(%esp)    //arg5
  69         mov    %edx,12(%esp)    //arg4
  70         mov    %ecx,8(%esp)             //arg3
  71         mov    %ebx,4(%esp)             //arg2
  72         mov    %eax,(%esp)              //arg1
  73         call   __pthread_wqthread
  74         leave
  75         ret
  76
  77         .align 2, 0x90
  78         .globl _thread_start
  79 _thread_start:
  80         // This routine is never called directly by user code, jumped from kernel
  81         push   %ebp
  82         mov    %esp,%ebp
  83         sub    $28,%esp         // align the stack
  84         mov    %esi,20(%esp)    //arg6
  85         mov    %edi,16(%esp)    //arg5
  86         mov    %edx,12(%esp)    //arg4
  87         mov    %ecx,8(%esp)     //arg3
  88         mov    %ebx,4(%esp)     //arg2
  89         mov    %eax,(%esp)      //arg1
  90         call   __pthread_start
  91         leave
  92         ret
  93
  94 #endif
  95
  96 #elif defined(__arm__)
  97
  98 #include <mach/arm/syscall_sw.h>
  99
 100 #ifndef VARIANT_DYLD
 101
 102 // This routine is never called directly by user code, jumped from kernel
 103 // args 0 to 3 are already in the regs 0 to 3
 104 // should set stack with the 2 extra args before calling pthread_wqthread()
 105 // arg4 is in r[4]
 106 // arg5 is in r[5]
 107
 108         .text
 109         .align 2
 110         .globl _start_wqthread
 111 _start_wqthread:
 112 #if __ARM_ARCH_7K__
 113         /* align stack to 16 bytes before calling C */
 114         sub sp, sp, #8
 115 #endif
 116         stmfd sp!, {r4, r5}
 117         bl __pthread_wqthread
 118 // Stackshots will show the routine that happens to link immediately following
 119 // _start_wqthread.  So we add an extra instruction (nop) to make stackshots
 120 // more readable.
 121         nop
 122
 123         .text
 124         .align 2
 125         .globl _thread_start
 126 _thread_start:
 127 #if __ARM_ARCH_7K__
 128         /* align stack to 16 bytes before calling C */
 129         sub sp, sp, #8
 130 #endif
 131         stmfd sp!, {r4, r5}
 132         bl __pthread_start
 133 // See above
 134         nop
 135
 136 #endif
 137
 138 #else
 139 #error Unsupported architecture
 140 #endif