pthreads/thread_setup.c

   1 /*
   2  * Copyright (c) 2000-2003 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  * 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 /*
  49  * Machine specific support for thread initialization
  50  */
  51
  52 #if defined(__ppc__)
  53 #include <architecture/ppc/cframe.h>
  54 #endif
  55
  56 #include "pthread_internals.h"
  57
  58 /*
  59  * Set up the initial state of a MACH thread
  60  */
  61 void
  62 _pthread_setup(pthread_t thread,
  63                void (*routine)(pthread_t),
  64                void *vsp, int suspended,
  65                int needresume)
  66 {
  67         kern_return_t r;
  68         unsigned int count;
  69 #if defined(__ppc__)
  70         struct ppc_thread_state state = {0};
  71         struct ppc_thread_state *ts = &state;
  72
  73         /*
  74          * Set up PowerPC registers.
  75          */
  76         count = PPC_THREAD_STATE_COUNT;
  77         if (suspended) {
  78                 PTHREAD_MACH_CALL(thread_get_state(thread->kernel_thread,
  79                                            PPC_THREAD_STATE,
  80                                            (thread_state_t) &state,
  81                                            &count),
  82                           r);
  83         }
  84         ts->srr0 = (int) routine;
  85         ts->r1 = (uintptr_t)vsp - C_ARGSAVE_LEN - C_RED_ZONE;
  86         ts->r3 = (int)thread;
  87         /* Incase of needresume, suspend is always set */
  88         if (suspended) {
  89                 PTHREAD_MACH_CALL(thread_set_state(thread->kernel_thread,
  90                                            PPC_THREAD_STATE,
  91                                            (thread_state_t) &state,
  92                                            PPC_THREAD_STATE_COUNT),
  93                           r);
  94                 if (needresume)
  95                         PTHREAD_MACH_CALL(thread_resume(thread->kernel_thread),
  96                                 r);
  97         } else {
  98                 PTHREAD_MACH_CALL(thread_create_running(mach_task_self(),
  99                                         PPC_THREAD_STATE,
 100                                         (thread_state_t) ts,
 101                                         PPC_THREAD_STATE_COUNT,
 102                                         &thread->kernel_thread),
 103                         r);
 104         }
 105 #elif defined(__i386__)
 106         i386_thread_state_t state = {0};
 107         i386_thread_state_t *ts = &state;
 108         int *sp = vsp;
 109
 110         /*
 111          * Set up i386 registers & function call.
 112          */
 113         count = i386_THREAD_STATE_COUNT;
 114         if (suspended) {
 115                 PTHREAD_MACH_CALL(thread_get_state(thread->kernel_thread,
 116                                            i386_THREAD_STATE,
 117                                            (thread_state_t) &state,
 118                                            &count),
 119                           r);
 120         }
 121         ts->eip = (int) routine;
 122         *--sp = (int) thread;   /* argument to function */
 123         *--sp = 0;              /* fake return address */
 124         ts->esp = (int) sp;     /* set stack pointer */
 125         /* Incase of needresume, suspend is always set */
 126         if (suspended) {
 127                 PTHREAD_MACH_CALL(thread_set_state(thread->kernel_thread,
 128                                            i386_THREAD_STATE,
 129                                            (thread_state_t) &state,
 130                                            i386_THREAD_STATE_COUNT),
 131                           r);
 132                 if (needresume)
 133                         PTHREAD_MACH_CALL(thread_resume(thread->kernel_thread),
 134                                 r);
 135         } else {
 136                 PTHREAD_MACH_CALL(thread_create_running(mach_task_self(),
 137                                         i386_THREAD_STATE,
 138                                         (thread_state_t) ts,
 139                                         i386_THREAD_STATE_COUNT,
 140                                         &thread->kernel_thread),
 141                         r);
 142         }
 143
 144 #else
 145 #error _pthread_setup not defined for this architecture
 146 #endif
 147 }