src/thread_setup.c

   1 /*
   2  * Copyright (c) 2000-2003, 2008, 2012 Apple 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  * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
  25  *              All Rights Reserved
  26  *
  27  * Permission to use, copy, modify, and distribute this software and
  28  * its documentation for any purpose and without fee is hereby granted,
  29  * provided that the above copyright notice appears in all copies and
  30  * that both the copyright notice and this permission notice appear in
  31  * supporting documentation.
  32  *
  33  * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
  34  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  35  * FOR A PARTICULAR PURPOSE.
  36  *
  37  * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
  38  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  39  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
  40  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
  41  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  42  *
  43  */
  44 /*
  45  * MkLinux
  46  */
  47
  48 #include "internal.h"
  49
  50 #if !defined(__OPEN_SOURCE__) && TARGET_OS_OSX // 40703288
  51 /*
  52  * Machine specific support for thread initialization
  53  */
  54
  55 // NOTE: no resolvers, so this file must not contain any atomic operations
  56
  57 PTHREAD_NOEXPORT void _pthread_setup_suspended(pthread_t th, void (*f)(pthread_t), void *sp);
  58
  59 /*
  60  * Set up the initial state of a MACH thread
  61  */
  62 void
  63 _pthread_setup_suspended(pthread_t thread,
  64                void (*routine)(pthread_t),
  65                void *vsp)
  66 {
  67 #if defined(__i386__)
  68         i386_thread_state_t state = { };
  69         thread_state_flavor_t flavor = x86_THREAD_STATE32;
  70         mach_msg_type_number_t count = i386_THREAD_STATE_COUNT;
  71 #elif defined(__x86_64__)
  72         x86_thread_state64_t state = { };
  73         thread_state_flavor_t flavor = x86_THREAD_STATE64;
  74         mach_msg_type_number_t count = x86_THREAD_STATE64_COUNT;
  75 #else
  76 #error _pthread_setup not defined for this architecture
  77 #endif
  78
  79         (void)thread_get_state(_pthread_kernel_thread(thread),
  80                         flavor, (thread_state_t)&state, &count);
  81
  82 #if defined(__i386__)
  83         uintptr_t *sp = vsp;
  84
  85         state.__eip = (uintptr_t)routine;
  86
  87         // We need to simulate a 16-byte aligned stack frame as if we had
  88         // executed a call instruction. Since we're "pushing" one argument,
  89         // we need to adjust the pointer by 12 bytes (3 * sizeof (int *))
  90         sp -= 3;                        // make sure stack is aligned
  91         *--sp = (uintptr_t)thread;      // argument to function
  92         *--sp = 0;                      // fake return address
  93         state.__esp = (uintptr_t)sp;    // set stack pointer
  94 #elif defined(__x86_64__)
  95         uintptr_t *sp = vsp;
  96
  97         state.__rip = (uintptr_t)routine;
  98
  99         // We need to simulate a 16-byte aligned stack frame as if we had
 100         // executed a call instruction. The stack should already be aligned
 101         // before it comes to us and we don't need to push any arguments,
 102         // so we shouldn't need to change it.
 103         state.__rdi = (uintptr_t)thread;        // argument to function
 104         *--sp = 0;                              // fake return address
 105         state.__rsp = (uintptr_t)sp;            // set stack pointer
 106 #else
 107 #error _pthread_setup_suspended not defined for this architecture
 108 #endif
 109
 110         (void)thread_set_state(_pthread_kernel_thread(thread), flavor, (thread_state_t)&state, count);
 111 }
 112 #endif // !defined(__OPEN_SOURCE__) && TARGET_OS_OSX