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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188

#![allow(clippy::result_unit_err)]

#[cfg(feature = "newlib")]
use hermit_sync::InterruptTicketMutex;
use hermit_sync::Lazy;

pub use self::condvar::*;
pub use self::entropy::*;
pub use self::futex::*;
pub use self::processor::*;
#[cfg(feature = "newlib")]
pub use self::recmutex::*;
pub use self::semaphore::*;
pub use self::spinlock::*;
pub use self::system::*;
pub use self::tasks::*;
pub use self::timer::*;
use crate::env;
use crate::fd::{dup_object, get_object, remove_object, FileDescriptor};
use crate::syscalls::interfaces::SyscallInterface;
#[cfg(target_os = "none")]
use crate::{__sys_free, __sys_malloc, __sys_realloc};

mod condvar;
mod entropy;
pub(crate) mod fs;
mod futex;
mod interfaces;
#[cfg(feature = "newlib")]
mod lwip;
#[cfg(all(feature = "tcp", not(feature = "newlib")))]
pub mod net;
mod processor;
#[cfg(feature = "newlib")]
mod recmutex;
mod semaphore;
mod spinlock;
mod system;
mod tasks;
mod timer;

#[cfg(feature = "newlib")]
const LWIP_FD_BIT: i32 = 1 << 30;

#[cfg(feature = "newlib")]
pub static LWIP_LOCK: InterruptTicketMutex<()> = InterruptTicketMutex::new(());

pub(crate) static SYS: Lazy<&'static dyn SyscallInterface> = Lazy::new(|| {
	if env::is_uhyve() {
		&self::interfaces::Uhyve
	} else {
		&self::interfaces::Generic
	}
});

pub(crate) fn init() {
	Lazy::force(&SYS);

	// Perform interface-specific initialization steps.
	SYS.init();

	init_entropy();
	#[cfg(feature = "newlib")]
	sbrk_init();
}

#[cfg(target_os = "none")]
#[no_mangle]
pub extern "C" fn sys_malloc(size: usize, align: usize) -> *mut u8 {
	kernel_function!(__sys_malloc(size, align))
}

#[cfg(target_os = "none")]
#[no_mangle]
pub extern "C" fn sys_realloc(ptr: *mut u8, size: usize, align: usize, new_size: usize) -> *mut u8 {
	kernel_function!(__sys_realloc(ptr, size, align, new_size))
}

#[cfg(target_os = "none")]
#[no_mangle]
pub extern "C" fn sys_free(ptr: *mut u8, size: usize, align: usize) {
	kernel_function!(__sys_free(ptr, size, align))
}

pub(crate) fn get_application_parameters() -> (i32, *const *const u8, *const *const u8) {
	SYS.get_application_parameters()
}

pub(crate) extern "C" fn __sys_shutdown(arg: i32) -> ! {
	// print some performance statistics
	crate::arch::kernel::print_statistics();

	SYS.shutdown(arg)
}

#[no_mangle]
pub extern "C" fn sys_shutdown(arg: i32) -> ! {
	kernel_function!(__sys_shutdown(arg))
}

extern "C" fn __sys_unlink(name: *const u8) -> i32 {
	SYS.unlink(name)
}

#[no_mangle]
pub extern "C" fn sys_unlink(name: *const u8) -> i32 {
	kernel_function!(__sys_unlink(name))
}

extern "C" fn __sys_open(name: *const u8, flags: i32, mode: i32) -> FileDescriptor {
	crate::fd::open(name, flags, mode).map_or_else(|e| e, |v| v)
}

#[no_mangle]
pub extern "C" fn sys_open(name: *const u8, flags: i32, mode: i32) -> FileDescriptor {
	kernel_function!(__sys_open(name, flags, mode))
}

extern "C" fn __sys_close(fd: FileDescriptor) -> i32 {
	let obj = remove_object(fd);
	obj.map_or_else(|e| e, |_| 0)
}

#[no_mangle]
pub extern "C" fn sys_close(fd: FileDescriptor) -> i32 {
	kernel_function!(__sys_close(fd))
}

extern "C" fn __sys_read(fd: FileDescriptor, buf: *mut u8, len: usize) -> isize {
	let obj = get_object(fd);
	obj.map_or_else(|e| e as isize, |v| (*v).read(buf, len))
}

#[no_mangle]
pub extern "C" fn sys_read(fd: FileDescriptor, buf: *mut u8, len: usize) -> isize {
	kernel_function!(__sys_read(fd, buf, len))
}

extern "C" fn __sys_write(fd: FileDescriptor, buf: *const u8, len: usize) -> isize {
	let obj = get_object(fd);
	obj.map_or_else(|e| e as isize, |v| (*v).write(buf, len))
}

#[no_mangle]
pub extern "C" fn sys_write(fd: FileDescriptor, buf: *const u8, len: usize) -> isize {
	kernel_function!(__sys_write(fd, buf, len))
}

extern "C" fn __sys_ioctl(fd: FileDescriptor, cmd: i32, argp: *mut core::ffi::c_void) -> i32 {
	let obj = get_object(fd);
	obj.map_or_else(|e| e, |v| (*v).ioctl(cmd, argp))
}

#[no_mangle]
pub extern "C" fn sys_ioctl(fd: FileDescriptor, cmd: i32, argp: *mut core::ffi::c_void) -> i32 {
	kernel_function!(__sys_ioctl(fd, cmd, argp))
}

extern "C" fn __sys_lseek(fd: FileDescriptor, offset: isize, whence: i32) -> isize {
	let obj = get_object(fd);
	obj.map_or_else(
		|e| e as isize,
		|v| (*v).lseek(offset, num::FromPrimitive::from_i32(whence).unwrap()),
	)
}

#[no_mangle]
pub extern "C" fn sys_lseek(fd: FileDescriptor, offset: isize, whence: i32) -> isize {
	kernel_function!(__sys_lseek(fd, offset, whence))
}

extern "C" fn __sys_stat(file: *const u8, st: usize) -> i32 {
	SYS.stat(file, st)
}

#[no_mangle]
pub extern "C" fn sys_stat(file: *const u8, st: usize) -> i32 {
	kernel_function!(__sys_stat(file, st))
}

extern "C" fn __sys_dup(fd: i32) -> i32 {
	dup_object(fd).map_or_else(|e| e, |v| v)
}

#[no_mangle]
pub extern "C" fn sys_dup(fd: i32) -> i32 {
	kernel_function!(__sys_dup(fd))
}