1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/*-
* Copyright (c) 2015 Nuxi, https://nuxi.nl/
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <contrib/cloudabi/cloudabi32_types.h>
#include <compat/cloudabi32/cloudabi32_proto.h>
#include <compat/cloudabi32/cloudabi32_util.h>
struct thread_create_args {
cloudabi32_threadattr_t attr;
uint32_t tcb;
lwpid_t tid;
};
static int
initialize_thread(struct thread *td, void *thunk)
{
struct thread_create_args *args = thunk;
/* Save the thread ID, so it can be returned. */
args->tid = td->td_tid;
/* Set up initial register contents. */
return (cloudabi32_thread_setregs(td, &args->attr, args->tcb));
}
int
cloudabi32_sys_thread_create(struct thread *td,
struct cloudabi32_sys_thread_create_args *uap)
{
struct thread_create_args args;
int error;
error = copyin(uap->attr, &args.attr, sizeof(args.attr));
if (error != 0)
return (error);
/* Remove some space on the top of the stack for the TCB. */
args.tcb = rounddown(args.attr.stack + args.attr.stack_size -
sizeof(cloudabi32_tcb_t), _Alignof(cloudabi32_tcb_t));
args.attr.stack_size = args.tcb - args.attr.stack;
error = thread_create(td, NULL, initialize_thread, &args);
if (error != 0)
return (error);
td->td_retval[0] = args.tid;
return (0);
}
|
