| 1 | /*
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| 2 | * Copyright (c) 2005 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup main
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | /**
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| 34 | * @file
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| 35 | * @brief Userspace bootstrap thread.
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| 36 | *
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| 37 | * This file contains uinit kernel thread wich is used to start every
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| 38 | * userspace thread including threads created by SYS_THREAD_CREATE syscall.
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| 39 | *
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| 40 | * @see SYS_THREAD_CREATE
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| 41 | */
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| 42 |
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| 43 | #include <main/uinit.h>
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| 44 | #include <arch/types.h>
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| 45 | #include <proc/thread.h>
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| 46 | #include <userspace.h>
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| 47 | #include <mm/slab.h>
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| 48 | #include <arch.h>
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| 49 |
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| 50 | /** Thread used to bring up userspace thread.
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| 51 | *
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| 52 | * @param arg Pointer to structure containing userspace entry and stack
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| 53 | * addresses.
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| 54 | */
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| 55 | void uinit(void *arg)
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| 56 | {
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| 57 | uspace_arg_t uarg;
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| 58 |
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| 59 | /*
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| 60 | * So far, we don't have a use for joining userspace threads so we
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| 61 | * immediately detach each uinit thread. If joining of userspace threads
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| 62 | * is required, some userspace API based on the kernel mechanism will
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| 63 | * have to be implemented. Moreover, garbage collecting of threads that
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| 64 | * didn't detach themselves and nobody else joined them will have to be
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| 65 | * deployed for the event of forceful task termination.
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| 66 | */
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| 67 | thread_detach(THREAD);
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| 68 |
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| 69 | uarg.uspace_entry = ((uspace_arg_t *) arg)->uspace_entry;
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| 70 | uarg.uspace_stack = ((uspace_arg_t *) arg)->uspace_stack;
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| 71 | uarg.uspace_uarg = ((uspace_arg_t *) arg)->uspace_uarg;
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| 72 | uarg.uspace_thread_function = NULL;
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| 73 | uarg.uspace_thread_arg = NULL;
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| 74 |
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| 75 | free((uspace_arg_t *) arg);
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| 76 | userspace(&uarg);
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| 77 | }
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| 78 |
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| 79 | /** @}
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| 80 | */
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