pthreads/thread_setup.c

   1 /*
   2  * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
  27  *              All Rights Reserved
  28  *
  29  * Permission to use, copy, modify, and distribute this software and
  30  * its documentation for any purpose and without fee is hereby granted,
  31  * provided that the above copyright notice appears in all copies and
  32  * that both the copyright notice and this permission notice appear in
  33  * supporting documentation.
  34  *
  35  * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
  36  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  37  * FOR A PARTICULAR PURPOSE.
  38  *
  39  * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
  40  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  41  * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
  42  * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
  43  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  44  *
  45  */
  46 /*
  47  * MkLinux
  48  */
  49
  50 /*
  51  * Machine specific support for thread initialization
  52  */
  53
  54 #if defined(__ppc__) || defined(__ppc64__)
  55 #include <architecture/ppc/cframe.h>
  56 #endif
  57
  58 #include "pthread_internals.h"
  59
  60 /*
  61  * Set up the initial state of a MACH thread
  62  */
  63 void
  64 _pthread_setup(pthread_t thread,
  65                void (*routine)(pthread_t),
  66                void *vsp, int suspended,
  67                int needresume)
  68 {
  69         kern_return_t r;
  70         unsigned int count;
  71 #if defined(__ppc__) || defined(__ppc64__)
  72         struct ppc_thread_state state = {0};
  73         struct ppc_thread_state *ts = &state;
  74
  75         /*
  76          * Set up PowerPC registers.
  77          */
  78         count = PPC_THREAD_STATE_COUNT;
  79         if (suspended) {
  80                 PTHREAD_MACH_CALL(thread_get_state(thread->kernel_thread,
  81                                            PPC_THREAD_STATE,
  82                                            (thread_state_t) &state,
  83                                            &count),
  84                           r);
  85         }
  86         ts->srr0 = (int) routine;
  87         ts->r1 = (uintptr_t)vsp - C_ARGSAVE_LEN - C_RED_ZONE;
  88         ts->r3 = (int)thread;
  89         /* Incase of needresume, suspend is always set */
  90         if (suspended) {
  91                 PTHREAD_MACH_CALL(thread_set_state(thread->kernel_thread,
  92                                            PPC_THREAD_STATE,
  93                                            (thread_state_t) &state,
  94                                            PPC_THREAD_STATE_COUNT),
  95                           r);
  96                 if (needresume)
  97                         PTHREAD_MACH_CALL(thread_resume(thread->kernel_thread),
  98                                 r);
  99         } else {
 100                 PTHREAD_MACH_CALL(thread_create_running(mach_task_self(),
 101                                         PPC_THREAD_STATE,
 102                                         (thread_state_t) ts,
 103                                         PPC_THREAD_STATE_COUNT,
 104                                         &thread->kernel_thread),
 105                         r);
 106         }
 107 #elif defined(__i386__)
 108         i386_thread_state_t state = {0};
 109         i386_thread_state_t *ts = &state;
 110         int *sp = vsp;
 111
 112         /*
 113          * Set up i386 registers & function call.
 114          */
 115         count = i386_THREAD_STATE_COUNT;
 116         if (suspended) {
 117                 PTHREAD_MACH_CALL(thread_get_state(thread->kernel_thread,
 118                                            i386_THREAD_STATE,
 119                                            (thread_state_t) &state,
 120                                            &count),
 121                           r);
 122         }
 123         ts->eip = (int) routine;
 124         *--sp = (int) thread;   /* argument to function */
 125         *--sp = 0;              /* fake return address */
 126         ts->esp = (int) sp;     /* set stack pointer */
 127         /* Incase of needresume, suspend is always set */
 128         if (suspended) {
 129                 PTHREAD_MACH_CALL(thread_set_state(thread->kernel_thread,
 130                                            i386_THREAD_STATE,
 131                                            (thread_state_t) &state,
 132                                            i386_THREAD_STATE_COUNT),
 133                           r);
 134                 if (needresume)
 135                         PTHREAD_MACH_CALL(thread_resume(thread->kernel_thread),
 136                                 r);
 137         } else {
 138                 PTHREAD_MACH_CALL(thread_create_running(mach_task_self(),
 139                                         i386_THREAD_STATE,
 140                                         (thread_state_t) ts,
 141                                         i386_THREAD_STATE_COUNT,
 142                                         &thread->kernel_thread),
 143                         r);
 144         }
 145
 146 #else
 147 #error _pthread_setup not defined for this architecture
 148 #endif
 149 }