nc 0.9.7

Access system calls directly
Documentation 
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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128

// Copyright (c) 2020 Xu Shaohua <shaohua@biofan.org>. All rights reserved.
// Use of this source is governed by Apache-2.0 License that can be found
// in the LICENSE file.

#![allow(clippy::missing_errors_doc)]
#![allow(clippy::missing_safety_doc)]
#![allow(clippy::module_name_repetitions)]

use super::types::{check_errno, Errno, Sysno};

#[inline]
pub unsafe fn syscall0(n: Sysno) -> Result<usize, Errno> {
    let ret: usize;
    llvm_asm!("syscall"
         : "=&{r2}"(ret)
         : "ir"(n)
         : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
         : "volatile");
    check_errno(ret)
}

#[inline]
pub unsafe fn syscall1(n: Sysno, a1: usize) -> Result<usize, Errno> {
    let ret: usize;
    llvm_asm!("syscall"
         : "=&{r2}"(ret)
         : "ir"(n),
           "{r4}"(a1)
         : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
         : "volatile");
    check_errno(ret)
}

#[inline]
pub unsafe fn syscall2(n: Sysno, a1: usize, a2: usize) -> Result<usize, Errno> {
    let ret: usize;
    llvm_asm!("syscall"
         : "=&{r2}"(ret)
         : "ir"(n),
           "{r4}"(a1),
           "{r5}"(a2)
         : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
         : "volatile");
    check_errno(ret)
}

#[inline]
pub unsafe fn syscall3(n: Sysno, a1: usize, a2: usize, a3: usize) -> Result<usize, Errno> {
    let ret: usize;
    llvm_asm!("syscall"
         : "=&{r2}"(ret)
         : "ir"(n),
           "{r4}"(a1),
           "{r5}"(a2),
           "{r6}"(a3)
         : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
         : "volatile");
    check_errno(ret)
}

#[inline]
pub unsafe fn syscall4(
    n: Sysno,
    a1: usize,
    a2: usize,
    a3: usize,
    a4: usize,
) -> Result<usize, Errno> {
    let ret: usize;
    llvm_asm!("syscall"
         : "=&{r2}"(ret)
         : "ir"(n),
           "{r4}"(a1),
           "{r5}"(a2),
           "{r6}"(a3),
           "{r7}"(a4)
         : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
         : "volatile");
    check_errno(ret)
}

#[inline]
pub unsafe fn syscall5(
    n: Sysno,
    a1: usize,
    a2: usize,
    a3: usize,
    a4: usize,
    a5: usize,
) -> Result<usize, Errno> {
    let ret: usize;
    llvm_asm!("syscall"
         : "=&{r2}"(ret)
         : "ir"(n),
           "{r4}"(a1),
           "{r5}"(a2),
           "{r6}"(a3),
           "{r7}"(a4),
           "{r8}"(a5)
         : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
         : "volatile");
    check_errno(ret)
}

#[inline]
pub unsafe fn syscall6(
    n: Sysno,
    a1: usize,
    a2: usize,
    a3: usize,
    a4: usize,
    a5: usize,
    a6: usize,
) -> Result<usize, Errno> {
    let ret: usize;
    llvm_asm!("syscall"
         : "=&{r2}"(ret)
         : "ir"(n),
           "{r4}"(a1),
           "{r5}"(a2),
           "{r6}"(a3),
           "{r7}"(a4),
           "{r8}"(a5),
           "{r9}"(a6)
         : "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24", "$25", "hi", "lo", "memory"
         : "volatile");
    check_errno(ret)
}