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
78
79
|
/* The clone3 syscall wrapper. Linux/arm version.
Copyright (C) 2023-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#define _ERRNO_H 1
#include <bits/errno.h>
/* The userland implementation is:
int clone3 (struct clone_args *cl_args, size_t size,
int (*func)(void *arg), void *arg);
the kernel entry is:
int clone3 (struct clone_args *cl_args, size_t size);
The parameters are passed in registers from userland:
r0: cl_args
r1: size
r2: func
r3: arg */
.text
ENTRY(__clone3)
/* Sanity check args. */
cmp r0, #0
ite ne
cmpne r1, #0
moveq r0, #-EINVAL
beq PLTJMP(syscall_error)
/* Do the syscall, the kernel expects:
r7: system call number:
r0: cl_args
r1: size */
push { r7 }
cfi_adjust_cfa_offset (4)
cfi_rel_offset (r7, 0)
ldr r7, =SYS_ify(clone3)
swi 0x0
cfi_endproc
cmp r0, #0
beq 1f
pop {r7}
blt PLTJMP(C_SYMBOL_NAME(__syscall_error))
RETINSTR(, lr)
cfi_startproc
PSEUDO_END (__clone3)
1:
.fnstart
.cantunwind
mov r0, r3
mov ip, r2
BLX (ip)
/* And we are done, passing the return value through r0. */
ldr r7, =SYS_ify(exit)
swi 0x0
.fnend
libc_hidden_def (__clone3)
|
