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
16 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
18 #define OS_TYPE_FILE 1
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
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 */
34 #define OS_LIB_PATH "/usr/lib64/"
36 #define OS_LIB_PATH "/usr/lib/"
40 * types taken from stat_file() in hostfs_user.c
41 * (if they are wrong here, they are wrong there...).
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 */
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 */
69 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
70 .t = 0, .a = 0, .e = 0, .cl = 0 })
72 static inline struct openflags of_read(struct openflags flags)
78 static inline struct openflags of_write(struct openflags flags)
84 static inline struct openflags of_rdwr(struct openflags flags)
86 return of_read(of_write(flags));
89 static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
96 static inline struct openflags of_sync(struct openflags flags)
102 static inline struct openflags of_create(struct openflags flags)
108 static inline struct openflags of_trunc(struct openflags flags)
114 static inline struct openflags of_append(struct openflags flags)
120 static inline struct openflags of_excl(struct openflags flags)
126 static inline struct openflags of_cloexec(struct openflags flags)
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);
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_pread_file(int fd, void *buf, int len, unsigned long long offset);
150 extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
151 extern int os_file_modtime(const char *file, unsigned long *modtime);
152 extern int os_pipe(int *fd, int stream, int close_on_exec);
153 extern int os_set_fd_async(int fd);
154 extern int os_clear_fd_async(int fd);
155 extern int os_set_fd_block(int fd, int blocking);
156 extern int os_accept_connection(int fd);
157 extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
158 extern int os_shutdown_socket(int fd, int r, int w);
159 extern void os_close_file(int fd);
160 extern int os_rcv_fd(int fd, int *helper_pid_out);
161 extern int create_unix_socket(char *file, int len, int close_on_exec);
162 extern int os_connect_socket(const char *name);
163 extern int os_file_type(char *file);
164 extern int os_file_mode(const char *file, struct openflags *mode_out);
165 extern int os_lock_file(int fd, int excl);
166 extern void os_flush_stdout(void);
167 extern int os_stat_filesystem(char *path, long *bsize_out,
168 long long *blocks_out, long long *bfree_out,
169 long long *bavail_out, long long *files_out,
170 long long *ffree_out, void *fsid_out,
171 int fsid_size, long *namelen_out,
173 extern int os_change_dir(char *dir);
174 extern int os_fchange_dir(int fd);
175 extern unsigned os_major(unsigned long long dev);
176 extern unsigned os_minor(unsigned long long dev);
177 extern unsigned long long os_makedev(unsigned major, unsigned minor);
178 extern int os_falloc_punch(int fd, unsigned long long offset, int count);
181 extern void os_early_checks(void);
182 extern void os_check_bugs(void);
183 extern void check_host_supports_tls(int *supports_tls, int *tls_min);
186 extern int create_mem_file(unsigned long long len);
189 extern unsigned long os_process_pc(int pid);
190 extern int os_process_parent(int pid);
191 extern void os_alarm_process(int pid);
192 extern void os_stop_process(int pid);
193 extern void os_kill_process(int pid, int reap_child);
194 extern void os_kill_ptraced_process(int pid, int reap_child);
196 extern int os_getpid(void);
197 extern int os_getpgrp(void);
199 extern void init_new_thread_signals(void);
201 extern int os_map_memory(void *virt, int fd, unsigned long long off,
202 unsigned long len, int r, int w, int x);
203 extern int os_protect_memory(void *addr, unsigned long len,
204 int r, int w, int x);
205 extern int os_unmap_memory(void *addr, int len);
206 extern int os_drop_memory(void *addr, int length);
207 extern int can_drop_memory(void);
208 extern void os_flush_stdout(void);
209 extern int os_mincore(void *addr, unsigned long len);
212 extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
214 extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
215 extern int run_helper_thread(int (*proc)(void *), void *arg,
216 unsigned int flags, unsigned long *stack_out);
217 extern int helper_wait(int pid);
221 extern int umid_file_name(char *name, char *buf, int len);
222 extern int set_umid(char *name);
223 extern char *get_umid(void);
226 extern void timer_set_signal_handler(void);
227 extern void set_sigstack(void *sig_stack, int size);
228 extern void remove_sigstack(void);
229 extern void set_handler(int sig);
230 extern int change_sig(int signal, int on);
231 extern void block_signals(void);
232 extern void unblock_signals(void);
233 extern int get_signals(void);
234 extern int set_signals(int enable);
235 extern int os_is_signal_stack(void);
236 extern void deliver_alarm(void);
239 extern void stack_protections(unsigned long address);
240 extern int raw(int fd);
241 extern void setup_machinename(char *machine_out);
242 extern void setup_hostinfo(char *buf, int len);
243 extern void os_dump_core(void) __attribute__ ((noreturn));
244 extern void um_early_printk(const char *s, unsigned int n);
245 extern void os_fix_helper_signals(void);
246 extern void os_info(const char *fmt, ...)
247 __attribute__ ((format (printf, 1, 2)));
248 extern void os_warn(const char *fmt, ...)
249 __attribute__ ((format (printf, 1, 2)));
252 extern void os_idle_sleep(unsigned long long nsecs);
253 extern int os_timer_create(void);
254 extern int os_timer_set_interval(unsigned long long nsecs);
255 extern int os_timer_one_shot(unsigned long long nsecs);
256 extern void os_timer_disable(void);
257 extern void uml_idle_timer(void);
258 extern long long os_persistent_clock_emulation(void);
259 extern long long os_nsecs(void);
262 extern long run_syscall_stub(struct mm_id * mm_idp,
263 int syscall, unsigned long *args, long expected,
264 void **addr, int done);
265 extern long syscall_stub_data(struct mm_id * mm_idp,
266 unsigned long *data, int data_count,
267 void **addr, void **stub_addr);
268 extern int map(struct mm_id * mm_idp, unsigned long virt,
269 unsigned long len, int prot, int phys_fd,
270 unsigned long long offset, int done, void **data);
271 extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
272 int done, void **data);
273 extern int protect(struct mm_id * mm_idp, unsigned long addr,
274 unsigned long len, unsigned int prot, int done, void **data);
277 extern int is_skas_winch(int pid, int fd, void *data);
278 extern int start_userspace(unsigned long stub_stack);
279 extern int copy_context_skas0(unsigned long stack, int pid);
280 extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs);
281 extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
282 unsigned long stack);
283 extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
284 extern void switch_threads(jmp_buf *me, jmp_buf *you);
285 extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
286 extern void initial_thread_cb_skas(void (*proc)(void *),
288 extern void halt_skas(void);
289 extern void reboot_skas(void);
292 extern int os_waiting_for_events_epoll(void);
293 extern void *os_epoll_get_data_pointer(int index);
294 extern int os_epoll_triggered(int index, int events);
295 extern int os_event_mask(int irq_type);
296 extern int os_setup_epoll(void);
297 extern int os_add_epoll_fd(int events, int fd, void *data);
298 extern int os_mod_epoll_fd(int events, int fd, void *data);
299 extern int os_del_epoll_fd(int fd);
300 extern void os_set_ioignore(void);
301 extern void os_close_epoll_fd(void);
304 extern int add_sigio_fd(int fd);
305 extern int ignore_sigio_fd(int fd);
306 extern void maybe_sigio_broken(int fd, int read);
307 extern void sigio_broken(int fd, int read);
310 extern int os_arch_prctl(int pid, int option, unsigned long *arg2);
313 extern int get_pty(void);
315 /* sys-$ARCH/task_size.c */
316 extern unsigned long os_get_top_address(void);
318 long syscall(long number, ...);