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
|
/* Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson (rth@tamu.edu).
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* clone() is even more special than fork() as it mucks with stacks
and invokes a function in the right context after its all over. */
#include <asm/errno.h>
#include <asm/unistd.h>
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
.text
.align 4
.globl __clone
.type __clone,@function
__clone:
save %sp,-96,%sp
/* sanity check arguments */
tst %i0
be .Lerror
orcc %i1,%g0,%o1
be .Lerror
mov %i2,%o0
/* Do the system call */
set __NR_clone,%g1
ta 0x10
bcs .Lerror
tst %o1
bne __thread_start
nop
ret
restore %o0,%g0,%o0
.Lerror:
call __errno_location
or %g0,EINVAL,%i0
st %i0,[%o0]
ret
restore %g0,-1,%o0
.size __clone, .-__clone
.type __thread_start,@function
__thread_start:
call %i0
mov %i3,%o0
call _exit,0
nop
.size __thread_start, .-__thread_start
.weak clone ; clone = __clone
|
