Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
4 * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
5 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 */
7
8#ifndef __OS_H__
9#define __OS_H__
10
11#include <irq_user.h>
12#include <longjmp.h>
13#include <mm_id.h>
14
15#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
16
17#define OS_TYPE_FILE 1
18#define OS_TYPE_DIR 2
19#define OS_TYPE_SYMLINK 3
20#define OS_TYPE_CHARDEV 4
21#define OS_TYPE_BLOCKDEV 5
22#define OS_TYPE_FIFO 6
23#define OS_TYPE_SOCK 7
24
25/* os_access() flags */
26#define OS_ACC_F_OK 0 /* Test for existence. */
27#define OS_ACC_X_OK 1 /* Test for execute permission. */
28#define OS_ACC_W_OK 2 /* Test for write permission. */
29#define OS_ACC_R_OK 4 /* Test for read permission. */
30#define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
31
32#ifdef CONFIG_64BIT
33#define OS_LIB_PATH "/usr/lib64/"
34#else
35#define OS_LIB_PATH "/usr/lib/"
36#endif
37
38#define OS_SENDMSG_MAX_FDS 8
39
40/*
41 * types taken from stat_file() in hostfs_user.c
42 * (if they are wrong here, they are wrong there...).
43 */
44struct uml_stat {
45 int ust_dev; /* device */
46 unsigned long long ust_ino; /* inode */
47 int ust_mode; /* protection */
48 int ust_nlink; /* number of hard links */
49 int ust_uid; /* user ID of owner */
50 int ust_gid; /* group ID of owner */
51 unsigned long long ust_size; /* total size, in bytes */
52 int ust_blksize; /* blocksize for filesystem I/O */
53 unsigned long long ust_blocks; /* number of blocks allocated */
54 unsigned long ust_atime; /* time of last access */
55 unsigned long ust_mtime; /* time of last modification */
56 unsigned long ust_ctime; /* time of last change */
57};
58
59struct openflags {
60 unsigned int r : 1;
61 unsigned int w : 1;
62 unsigned int s : 1; /* O_SYNC */
63 unsigned int c : 1; /* O_CREAT */
64 unsigned int t : 1; /* O_TRUNC */
65 unsigned int a : 1; /* O_APPEND */
66 unsigned int e : 1; /* O_EXCL */
67 unsigned int cl : 1; /* FD_CLOEXEC */
68};
69
70#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
71 .t = 0, .a = 0, .e = 0, .cl = 0 })
72
73static inline struct openflags of_read(struct openflags flags)
74{
75 flags.r = 1;
76 return flags;
77}
78
79static inline struct openflags of_write(struct openflags flags)
80{
81 flags.w = 1;
82 return flags;
83}
84
85static inline struct openflags of_rdwr(struct openflags flags)
86{
87 return of_read(of_write(flags));
88}
89
90static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
91{
92 flags.r = r;
93 flags.w = w;
94 return flags;
95}
96
97static inline struct openflags of_sync(struct openflags flags)
98{
99 flags.s = 1;
100 return flags;
101}
102
103static inline struct openflags of_create(struct openflags flags)
104{
105 flags.c = 1;
106 return flags;
107}
108
109static inline struct openflags of_trunc(struct openflags flags)
110{
111 flags.t = 1;
112 return flags;
113}
114
115static inline struct openflags of_append(struct openflags flags)
116{
117 flags.a = 1;
118 return flags;
119}
120
121static inline struct openflags of_excl(struct openflags flags)
122{
123 flags.e = 1;
124 return flags;
125}
126
127static inline struct openflags of_cloexec(struct openflags flags)
128{
129 flags.cl = 1;
130 return flags;
131}
132
133/* file.c */
134extern int os_stat_file(const char *file_name, struct uml_stat *buf);
135extern int os_stat_fd(const int fd, struct uml_stat *buf);
136extern int os_access(const char *file, int mode);
137extern int os_set_exec_close(int fd);
138extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
139extern int os_get_ifname(int fd, char *namebuf);
140extern int os_set_slip(int fd);
141extern int os_mode_fd(int fd, int mode);
142extern int os_fsync_file(int fd);
143
144extern int os_seek_file(int fd, unsigned long long offset);
145extern int os_open_file(const char *file, struct openflags flags, int mode);
146extern int os_read_file(int fd, void *buf, int len);
147extern int os_write_file(int fd, const void *buf, int count);
148extern int os_sync_file(int fd);
149extern int os_file_size(const char *file, unsigned long long *size_out);
150extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset);
151extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
152extern int os_file_modtime(const char *file, long long *modtime);
153extern int os_pipe(int *fd, int stream, int close_on_exec);
154extern int os_set_fd_async(int fd);
155extern int os_clear_fd_async(int fd);
156extern int os_set_fd_block(int fd, int blocking);
157extern int os_accept_connection(int fd);
158extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
159extern int os_shutdown_socket(int fd, int r, int w);
160extern void os_close_file(int fd);
161extern int os_rcv_fd(int fd, int *helper_pid_out);
162extern int os_connect_socket(const char *name);
163extern int os_file_type(char *file);
164extern int os_file_mode(const char *file, struct openflags *mode_out);
165extern int os_lock_file(int fd, int excl);
166extern void os_flush_stdout(void);
167extern unsigned os_major(unsigned long long dev);
168extern unsigned os_minor(unsigned long long dev);
169extern unsigned long long os_makedev(unsigned major, unsigned minor);
170extern int os_falloc_punch(int fd, unsigned long long offset, int count);
171extern int os_eventfd(unsigned int initval, int flags);
172extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len,
173 const int *fds, unsigned int fds_num);
174int os_poll(unsigned int n, const int *fds);
175
176/* start_up.c */
177extern void os_early_checks(void);
178extern void os_check_bugs(void);
179extern void check_host_supports_tls(int *supports_tls, int *tls_min);
180extern void get_host_cpu_features(
181 void (*flags_helper_func)(char *line),
182 void (*cache_helper_func)(char *line));
183
184/* mem.c */
185extern int create_mem_file(unsigned long long len);
186
187/* process.c */
188extern unsigned long os_process_pc(int pid);
189extern int os_process_parent(int pid);
190extern void os_alarm_process(int pid);
191extern void os_stop_process(int pid);
192extern void os_kill_process(int pid, int reap_child);
193extern void os_kill_ptraced_process(int pid, int reap_child);
194
195extern int os_getpid(void);
196extern int os_getpgrp(void);
197
198extern void init_new_thread_signals(void);
199
200extern int os_map_memory(void *virt, int fd, unsigned long long off,
201 unsigned long len, int r, int w, int x);
202extern int os_protect_memory(void *addr, unsigned long len,
203 int r, int w, int x);
204extern int os_unmap_memory(void *addr, int len);
205extern int os_drop_memory(void *addr, int length);
206extern int can_drop_memory(void);
207extern int os_mincore(void *addr, unsigned long len);
208
209/* execvp.c */
210extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
211/* helper.c */
212extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
213extern int run_helper_thread(int (*proc)(void *), void *arg,
214 unsigned int flags, unsigned long *stack_out);
215extern int helper_wait(int pid);
216
217
218/* umid.c */
219extern int umid_file_name(char *name, char *buf, int len);
220extern int set_umid(char *name);
221extern char *get_umid(void);
222
223/* signal.c */
224extern void timer_set_signal_handler(void);
225extern void set_sigstack(void *sig_stack, int size);
226extern void set_handler(int sig);
227extern void send_sigio_to_self(void);
228extern int change_sig(int signal, int on);
229extern void block_signals(void);
230extern void unblock_signals(void);
231extern int um_set_signals(int enable);
232extern int um_set_signals_trace(int enable);
233extern int os_is_signal_stack(void);
234extern void deliver_alarm(void);
235extern void register_pm_wake_signal(void);
236extern void block_signals_hard(void);
237extern void unblock_signals_hard(void);
238extern void mark_sigio_pending(void);
239
240/* util.c */
241extern void stack_protections(unsigned long address);
242extern int raw(int fd);
243extern void setup_machinename(char *machine_out);
244extern void setup_hostinfo(char *buf, int len);
245extern void os_dump_core(void) __attribute__ ((noreturn));
246extern void um_early_printk(const char *s, unsigned int n);
247extern void os_fix_helper_signals(void);
248extern void os_info(const char *fmt, ...)
249 __attribute__ ((format (printf, 1, 2)));
250extern void os_warn(const char *fmt, ...)
251 __attribute__ ((format (printf, 1, 2)));
252
253/* time.c */
254extern void os_idle_sleep(void);
255extern int os_timer_create(void);
256extern int os_timer_set_interval(unsigned long long nsecs);
257extern int os_timer_one_shot(unsigned long long nsecs);
258extern void os_timer_disable(void);
259extern long long os_persistent_clock_emulation(void);
260extern long long os_nsecs(void);
261
262/* skas/mem.c */
263extern long run_syscall_stub(struct mm_id * mm_idp,
264 int syscall, unsigned long *args, long expected,
265 void **addr, int done);
266extern long syscall_stub_data(struct mm_id * mm_idp,
267 unsigned long *data, int data_count,
268 void **addr, void **stub_addr);
269extern int map(struct mm_id * mm_idp, unsigned long virt,
270 unsigned long len, int prot, int phys_fd,
271 unsigned long long offset, int done, void **data);
272extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
273 int done, void **data);
274extern int protect(struct mm_id * mm_idp, unsigned long addr,
275 unsigned long len, unsigned int prot, int done, void **data);
276
277/* skas/process.c */
278extern int is_skas_winch(int pid, int fd, void *data);
279extern int start_userspace(unsigned long stub_stack);
280extern int copy_context_skas0(unsigned long stack, int pid);
281extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs);
282extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
283extern void switch_threads(jmp_buf *me, jmp_buf *you);
284extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
285extern void initial_thread_cb_skas(void (*proc)(void *),
286 void *arg);
287extern void halt_skas(void);
288extern void reboot_skas(void);
289
290/* irq.c */
291extern int os_waiting_for_events_epoll(void);
292extern void *os_epoll_get_data_pointer(int index);
293extern int os_epoll_triggered(int index, int events);
294extern int os_event_mask(enum um_irq_type irq_type);
295extern int os_setup_epoll(void);
296extern int os_add_epoll_fd(int events, int fd, void *data);
297extern int os_mod_epoll_fd(int events, int fd, void *data);
298extern int os_del_epoll_fd(int fd);
299extern void os_set_ioignore(void);
300extern void os_close_epoll_fd(void);
301extern void um_irqs_suspend(void);
302extern void um_irqs_resume(void);
303
304/* sigio.c */
305extern int add_sigio_fd(int fd);
306extern int ignore_sigio_fd(int fd);
307extern void maybe_sigio_broken(int fd);
308extern void sigio_broken(int fd);
309/*
310 * unlocked versions for IRQ controller code.
311 *
312 * This is safe because it's used at suspend/resume and nothing
313 * else is running.
314 */
315extern int __add_sigio_fd(int fd);
316extern int __ignore_sigio_fd(int fd);
317
318/* prctl.c */
319extern int os_arch_prctl(int pid, int option, unsigned long *arg2);
320
321/* tty.c */
322extern int get_pty(void);
323
324/* sys-$ARCH/task_size.c */
325extern unsigned long os_get_top_address(void);
326
327long syscall(long number, ...);
328
329/* irqflags tracing */
330extern void block_signals_trace(void);
331extern void unblock_signals_trace(void);
332extern void um_trace_signals_on(void);
333extern void um_trace_signals_off(void);
334
335/* time-travel */
336extern void deliver_time_travel_irqs(void);
337
338#endif