1 /*
2 * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
3 * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
4 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
5 * Licensed under the GPL
6 */
7
8 #ifndef __OS_H__
9 #define __OS_H__
10
11 #include <stdarg.h>
12 #include <irq_user.h>
13 #include <longjmp.h>
14 #include <mm_id.h>
15
16 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
17
18 #define OS_TYPE_FILE 1
19 #define OS_TYPE_DIR 2
20 #define OS_TYPE_SYMLINK 3
21 #define OS_TYPE_CHARDEV 4
22 #define OS_TYPE_BLOCKDEV 5
23 #define OS_TYPE_FIFO 6
24 #define OS_TYPE_SOCK 7
25
26 /* os_access() flags */
27 #define OS_ACC_F_OK 0 /* Test for existence. */
28 #define OS_ACC_X_OK 1 /* Test for execute permission. */
29 #define OS_ACC_W_OK 2 /* Test for write permission. */
30 #define OS_ACC_R_OK 4 /* Test for read permission. */
31 #define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
32
33 #ifdef CONFIG_64BIT
34 #define OS_LIB_PATH "/usr/lib64/"
35 #else
36 #define OS_LIB_PATH "/usr/lib/"
37 #endif
38
39 /*
40 * types taken from stat_file() in hostfs_user.c
41 * (if they are wrong here, they are wrong there...).
42 */
43 struct uml_stat {
44 int ust_dev; /* device */
45 unsigned long long ust_ino; /* inode */
46 int ust_mode; /* protection */
47 int ust_nlink; /* number of hard links */
48 int ust_uid; /* user ID of owner */
49 int ust_gid; /* group ID of owner */
50 unsigned long long ust_size; /* total size, in bytes */
51 int ust_blksize; /* blocksize for filesystem I/O */
52 unsigned long long ust_blocks; /* number of blocks allocated */
53 unsigned long ust_atime; /* time of last access */
54 unsigned long ust_mtime; /* time of last modification */
55 unsigned long ust_ctime; /* time of last change */
56 };
57
58 struct openflags {
59 unsigned int r : 1;
60 unsigned int w : 1;
61 unsigned int s : 1; /* O_SYNC */
62 unsigned int c : 1; /* O_CREAT */
63 unsigned int t : 1; /* O_TRUNC */
64 unsigned int a : 1; /* O_APPEND */
65 unsigned int e : 1; /* O_EXCL */
66 unsigned int cl : 1; /* FD_CLOEXEC */
67 };
68
69 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
70 .t = 0, .a = 0, .e = 0, .cl = 0 })
71
of_read(struct openflags flags)72 static inline struct openflags of_read(struct openflags flags)
73 {
74 flags.r = 1;
75 return flags;
76 }
77
of_write(struct openflags flags)78 static inline struct openflags of_write(struct openflags flags)
79 {
80 flags.w = 1;
81 return flags;
82 }
83
of_rdwr(struct openflags flags)84 static inline struct openflags of_rdwr(struct openflags flags)
85 {
86 return of_read(of_write(flags));
87 }
88
of_set_rw(struct openflags flags,int r,int w)89 static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
90 {
91 flags.r = r;
92 flags.w = w;
93 return flags;
94 }
95
of_sync(struct openflags flags)96 static inline struct openflags of_sync(struct openflags flags)
97 {
98 flags.s = 1;
99 return flags;
100 }
101
of_create(struct openflags flags)102 static inline struct openflags of_create(struct openflags flags)
103 {
104 flags.c = 1;
105 return flags;
106 }
107
of_trunc(struct openflags flags)108 static inline struct openflags of_trunc(struct openflags flags)
109 {
110 flags.t = 1;
111 return flags;
112 }
113
of_append(struct openflags flags)114 static inline struct openflags of_append(struct openflags flags)
115 {
116 flags.a = 1;
117 return flags;
118 }
119
of_excl(struct openflags flags)120 static inline struct openflags of_excl(struct openflags flags)
121 {
122 flags.e = 1;
123 return flags;
124 }
125
of_cloexec(struct openflags flags)126 static inline struct openflags of_cloexec(struct openflags flags)
127 {
128 flags.cl = 1;
129 return flags;
130 }
131
132 /* file.c */
133 extern int os_stat_file(const char *file_name, struct uml_stat *buf);
134 extern int os_stat_fd(const int fd, struct uml_stat *buf);
135 extern int os_access(const char *file, int mode);
136 extern int os_set_exec_close(int fd);
137 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
138 extern int os_get_ifname(int fd, char *namebuf);
139 extern int os_set_slip(int fd);
140 extern int os_mode_fd(int fd, int mode);
141 extern int os_fsync_file(int fd);
142
143 extern int os_seek_file(int fd, unsigned long long offset);
144 extern int os_open_file(const char *file, struct openflags flags, int mode);
145 extern int os_read_file(int fd, void *buf, int len);
146 extern int os_write_file(int fd, const void *buf, int count);
147 extern int os_sync_file(int fd);
148 extern int os_file_size(const char *file, unsigned long long *size_out);
149 extern int os_file_modtime(const char *file, unsigned long *modtime);
150 extern int os_pipe(int *fd, int stream, int close_on_exec);
151 extern int os_set_fd_async(int fd);
152 extern int os_clear_fd_async(int fd);
153 extern int os_set_fd_block(int fd, int blocking);
154 extern int os_accept_connection(int fd);
155 extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
156 extern int os_shutdown_socket(int fd, int r, int w);
157 extern void os_close_file(int fd);
158 extern int os_rcv_fd(int fd, int *helper_pid_out);
159 extern int create_unix_socket(char *file, int len, int close_on_exec);
160 extern int os_connect_socket(const char *name);
161 extern int os_file_type(char *file);
162 extern int os_file_mode(const char *file, struct openflags *mode_out);
163 extern int os_lock_file(int fd, int excl);
164 extern void os_flush_stdout(void);
165 extern int os_stat_filesystem(char *path, long *bsize_out,
166 long long *blocks_out, long long *bfree_out,
167 long long *bavail_out, long long *files_out,
168 long long *ffree_out, void *fsid_out,
169 int fsid_size, long *namelen_out,
170 long *spare_out);
171 extern int os_change_dir(char *dir);
172 extern int os_fchange_dir(int fd);
173 extern unsigned os_major(unsigned long long dev);
174 extern unsigned os_minor(unsigned long long dev);
175 extern unsigned long long os_makedev(unsigned major, unsigned minor);
176
177 /* start_up.c */
178 extern void os_early_checks(void);
179 extern void os_check_bugs(void);
180 extern void check_host_supports_tls(int *supports_tls, int *tls_min);
181
182 /* mem.c */
183 extern int create_mem_file(unsigned long long len);
184
185 /* process.c */
186 extern unsigned long os_process_pc(int pid);
187 extern int os_process_parent(int pid);
188 extern void os_alarm_process(int pid);
189 extern void os_stop_process(int pid);
190 extern void os_kill_process(int pid, int reap_child);
191 extern void os_kill_ptraced_process(int pid, int reap_child);
192
193 extern int os_getpid(void);
194 extern int os_getpgrp(void);
195
196 extern void init_new_thread_signals(void);
197
198 extern int os_map_memory(void *virt, int fd, unsigned long long off,
199 unsigned long len, int r, int w, int x);
200 extern int os_protect_memory(void *addr, unsigned long len,
201 int r, int w, int x);
202 extern int os_unmap_memory(void *addr, int len);
203 extern int os_drop_memory(void *addr, int length);
204 extern int can_drop_memory(void);
205 extern void os_flush_stdout(void);
206 extern int os_mincore(void *addr, unsigned long len);
207
208 /* execvp.c */
209 extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
210 /* helper.c */
211 extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
212 extern int run_helper_thread(int (*proc)(void *), void *arg,
213 unsigned int flags, unsigned long *stack_out);
214 extern int helper_wait(int pid);
215
216
217 /* umid.c */
218 extern int umid_file_name(char *name, char *buf, int len);
219 extern int set_umid(char *name);
220 extern char *get_umid(void);
221
222 /* signal.c */
223 extern void timer_set_signal_handler(void);
224 extern void set_sigstack(void *sig_stack, int size);
225 extern void remove_sigstack(void);
226 extern void set_handler(int sig);
227 extern int change_sig(int signal, int on);
228 extern void block_signals(void);
229 extern void unblock_signals(void);
230 extern int get_signals(void);
231 extern int set_signals(int enable);
232 extern int os_is_signal_stack(void);
233 extern void deliver_alarm(void);
234
235 /* util.c */
236 extern void stack_protections(unsigned long address);
237 extern int raw(int fd);
238 extern void setup_machinename(char *machine_out);
239 extern void setup_hostinfo(char *buf, int len);
240 extern void os_dump_core(void) __attribute__ ((noreturn));
241 extern void um_early_printk(const char *s, unsigned int n);
242 extern void os_fix_helper_signals(void);
243
244 /* time.c */
245 extern void os_idle_sleep(unsigned long long nsecs);
246 extern int os_timer_create(void* timer);
247 extern int os_timer_set_interval(void* timer, void* its);
248 extern int os_timer_one_shot(int ticks);
249 extern long long os_timer_disable(void);
250 extern long os_timer_remain(void* timer);
251 extern void uml_idle_timer(void);
252 extern long long os_persistent_clock_emulation(void);
253 extern long long os_nsecs(void);
254 extern long long os_vnsecs(void);
255
256 /* skas/mem.c */
257 extern long run_syscall_stub(struct mm_id * mm_idp,
258 int syscall, unsigned long *args, long expected,
259 void **addr, int done);
260 extern long syscall_stub_data(struct mm_id * mm_idp,
261 unsigned long *data, int data_count,
262 void **addr, void **stub_addr);
263 extern int map(struct mm_id * mm_idp, unsigned long virt,
264 unsigned long len, int prot, int phys_fd,
265 unsigned long long offset, int done, void **data);
266 extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
267 int done, void **data);
268 extern int protect(struct mm_id * mm_idp, unsigned long addr,
269 unsigned long len, unsigned int prot, int done, void **data);
270
271 /* skas/process.c */
272 extern int is_skas_winch(int pid, int fd, void *data);
273 extern int start_userspace(unsigned long stub_stack);
274 extern int copy_context_skas0(unsigned long stack, int pid);
275 extern void userspace(struct uml_pt_regs *regs);
276 extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
277 unsigned long stack);
278 extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
279 extern void switch_threads(jmp_buf *me, jmp_buf *you);
280 extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
281 extern void initial_thread_cb_skas(void (*proc)(void *),
282 void *arg);
283 extern void halt_skas(void);
284 extern void reboot_skas(void);
285 extern int get_syscall(struct uml_pt_regs *regs);
286
287 /* irq.c */
288 extern int os_waiting_for_events(struct irq_fd *active_fds);
289 extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
290 extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
291 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
292 extern void os_free_irq_later(struct irq_fd *active_fds,
293 int irq, void *dev_id);
294 extern int os_get_pollfd(int i);
295 extern void os_set_pollfd(int i, int fd);
296 extern void os_set_ioignore(void);
297
298 /* sigio.c */
299 extern int add_sigio_fd(int fd);
300 extern int ignore_sigio_fd(int fd);
301 extern void maybe_sigio_broken(int fd, int read);
302 extern void sigio_broken(int fd, int read);
303
304 /* sys-x86_64/prctl.c */
305 extern int os_arch_prctl(int pid, int code, unsigned long *addr);
306
307 /* tty.c */
308 extern int get_pty(void);
309
310 /* sys-$ARCH/task_size.c */
311 extern unsigned long os_get_top_address(void);
312
313 long syscall(long number, ...);
314
315 #endif
316