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
|
// requires the user_ptr type from kernel/types.h or init/types.h
#pragma once
#include <stddef.h>
typedef int handle_t;
enum {
// idc about stable syscall numbers just yet
_SYSCALL_EXIT,
_SYSCALL_AWAIT,
_SYSCALL_FORK,
_SYSCALL_FS_OPEN,
_SYSCALL_FD_MOUNT,
_SYSCALL_FD_READ,
_SYSCALL_FD_WRITE,
_SYSCALL_FD_CLOSE,
};
/** Kills the current process.
* TODO: what happens to the children?
*/
_Noreturn void _syscall_exit(const user_ptr msg, size_t len);
/** Waits for a child to exit, putting its exit message into *buf.
* @return the length of the message
*/
int _syscall_await(user_ptr buf, int len);
/** Creates a copy of the current process, and executes it.
* All user memory pages get copied too.
* @return 0 in the child, a meaningless positive value in the parent.
*/
int _syscall_fork(void);
handle_t _syscall_fs_open(const user_ptr path, int len);
int _syscall_fd_mount(handle_t, const user_ptr path, int len);
int _syscall_fd_read(handle_t, user_ptr buf, int len);
int _syscall_fd_write(handle_t, user_ptr buf, int len);
int _syscall_fd_close(handle_t);
|
