78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*-
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* Copyright (c) 2015 Nuxi, https://nuxi.nl/
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*
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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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* are met:
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* 1. 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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* 2. 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <contrib/cloudabi/cloudabi32_types.h>
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#include <compat/cloudabi32/cloudabi32_proto.h>
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#include <compat/cloudabi32/cloudabi32_util.h>
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struct thread_create_args {
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cloudabi32_threadattr_t attr;
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uint32_t tcb;
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lwpid_t tid;
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};
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static int
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initialize_thread(struct thread *td, void *thunk)
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{
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struct thread_create_args *args = thunk;
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/* Save the thread ID, so it can be returned. */
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args->tid = td->td_tid;
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/* Set up initial register contents. */
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return (cloudabi32_thread_setregs(td, &args->attr, args->tcb));
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}
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int
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cloudabi32_sys_thread_create(struct thread *td,
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struct cloudabi32_sys_thread_create_args *uap)
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{
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struct thread_create_args args;
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int error;
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error = copyin(uap->attr, &args.attr, sizeof(args.attr));
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if (error != 0)
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return (error);
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/* Remove some space on the top of the stack for the TCB. */
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args.tcb = rounddown(args.attr.stack + args.attr.stack_len -
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sizeof(cloudabi32_tcb_t), _Alignof(cloudabi32_tcb_t));
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args.attr.stack_len = args.tcb - args.attr.stack;
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error = thread_create(td, NULL, initialize_thread, &args);
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if (error != 0)
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return (error);
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td->td_retval[0] = args.tid;
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return (0);
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}
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