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* Copyright (c) 2005 Jakub Jermar
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* @brief Userspace bootstrap thread.
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* This file contains uinit kernel thread wich is used to start every
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* userspace thread including threads created by SYS_THREAD_CREATE syscall.
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* @see SYS_THREAD_CREATE
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#include <main/uinit.h>
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#include <arch/types.h>
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#include <proc/thread.h>
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#include <userspace.h>
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#include <udebug/udebug.h>
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/** Thread used to bring up userspace thread.
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* @param arg Pointer to structure containing userspace entry and stack
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* So far, we don't have a use for joining userspace threads so we
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* immediately detach each uinit thread. If joining of userspace threads
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* is required, some userspace API based on the kernel mechanism will
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* have to be implemented. Moreover, garbage collecting of threads that
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* didn't detach themselves and nobody else joined them will have to be
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* deployed for the event of forceful task termination.
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thread_detach(THREAD);
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udebug_stoppable_end();
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uarg.uspace_entry = ((uspace_arg_t *) arg)->uspace_entry;
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uarg.uspace_stack = ((uspace_arg_t *) arg)->uspace_stack;
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uarg.uspace_uarg = ((uspace_arg_t *) arg)->uspace_uarg;
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uarg.uspace_thread_function = NULL;
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uarg.uspace_thread_arg = NULL;
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free((uspace_arg_t *) arg);
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* Disable interrupts so that the execution of userspace() is not
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* disturbed by any interrupts as some of the userspace()
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* implementations will switch to the userspace stack before switching
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(void) interrupts_disable();