2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
14 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
16 #define OS_TYPE_FILE 1
18 #define OS_TYPE_SYMLINK 3
19 #define OS_TYPE_CHARDEV 4
20 #define OS_TYPE_BLOCKDEV 5
21 #define OS_TYPE_FIFO 6
22 #define OS_TYPE_SOCK 7
24 /* os_access() flags */
25 #define OS_ACC_F_OK 0 /* Test for existence. */
26 #define OS_ACC_X_OK 1 /* Test for execute permission. */
27 #define OS_ACC_W_OK 2 /* Test for write permission. */
28 #define OS_ACC_R_OK 4 /* Test for read permission. */
29 #define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
32 #define OS_LIB_PATH "/usr/lib64/"
34 #define OS_LIB_PATH "/usr/lib/"
38 * types taken from stat_file() in hostfs_user.c
39 * (if they are wrong here, they are wrong there...).
42 int ust_dev
; /* device */
43 unsigned long long ust_ino
; /* inode */
44 int ust_mode
; /* protection */
45 int ust_nlink
; /* number of hard links */
46 int ust_uid
; /* user ID of owner */
47 int ust_gid
; /* group ID of owner */
48 unsigned long long ust_size
; /* total size, in bytes */
49 int ust_blksize
; /* blocksize for filesystem I/O */
50 unsigned long long ust_blocks
; /* number of blocks allocated */
51 unsigned long ust_atime
; /* time of last access */
52 unsigned long ust_mtime
; /* time of last modification */
53 unsigned long ust_ctime
; /* time of last change */
59 unsigned int s
: 1; /* O_SYNC */
60 unsigned int c
: 1; /* O_CREAT */
61 unsigned int t
: 1; /* O_TRUNC */
62 unsigned int a
: 1; /* O_APPEND */
63 unsigned int e
: 1; /* O_EXCL */
64 unsigned int cl
: 1; /* FD_CLOEXEC */
67 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
68 .t = 0, .a = 0, .e = 0, .cl = 0 })
70 static inline struct openflags
of_read(struct openflags flags
)
76 static inline struct openflags
of_write(struct openflags flags
)
82 static inline struct openflags
of_rdwr(struct openflags flags
)
84 return of_read(of_write(flags
));
87 static inline struct openflags
of_set_rw(struct openflags flags
, int r
, int w
)
94 static inline struct openflags
of_sync(struct openflags flags
)
100 static inline struct openflags
of_create(struct openflags flags
)
106 static inline struct openflags
of_trunc(struct openflags flags
)
112 static inline struct openflags
of_append(struct openflags flags
)
118 static inline struct openflags
of_excl(struct openflags flags
)
124 static inline struct openflags
of_cloexec(struct openflags flags
)
131 extern int os_stat_file(const char *file_name
, struct uml_stat
*buf
);
132 extern int os_stat_fd(const int fd
, struct uml_stat
*buf
);
133 extern int os_access(const char *file
, int mode
);
134 extern int os_set_exec_close(int fd
);
135 extern int os_ioctl_generic(int fd
, unsigned int cmd
, unsigned long arg
);
136 extern int os_get_ifname(int fd
, char *namebuf
);
137 extern int os_set_slip(int fd
);
138 extern int os_mode_fd(int fd
, int mode
);
140 extern int os_seek_file(int fd
, unsigned long long offset
);
141 extern int os_open_file(const char *file
, struct openflags flags
, int mode
);
142 extern int os_read_file(int fd
, void *buf
, int len
);
143 extern int os_write_file(int fd
, const void *buf
, int count
);
144 extern int os_sync_file(int fd
);
145 extern int os_file_size(const char *file
, unsigned long long *size_out
);
146 extern int os_file_modtime(const char *file
, unsigned long *modtime
);
147 extern int os_pipe(int *fd
, int stream
, int close_on_exec
);
148 extern int os_set_fd_async(int fd
);
149 extern int os_clear_fd_async(int fd
);
150 extern int os_set_fd_block(int fd
, int blocking
);
151 extern int os_accept_connection(int fd
);
152 extern int os_create_unix_socket(const char *file
, int len
, int close_on_exec
);
153 extern int os_shutdown_socket(int fd
, int r
, int w
);
154 extern void os_close_file(int fd
);
155 extern int os_rcv_fd(int fd
, int *helper_pid_out
);
156 extern int create_unix_socket(char *file
, int len
, int close_on_exec
);
157 extern int os_connect_socket(const char *name
);
158 extern int os_file_type(char *file
);
159 extern int os_file_mode(const char *file
, struct openflags
*mode_out
);
160 extern int os_lock_file(int fd
, int excl
);
161 extern void os_flush_stdout(void);
162 extern int os_stat_filesystem(char *path
, long *bsize_out
,
163 long long *blocks_out
, long long *bfree_out
,
164 long long *bavail_out
, long long *files_out
,
165 long long *ffree_out
, void *fsid_out
,
166 int fsid_size
, long *namelen_out
,
168 extern int os_change_dir(char *dir
);
169 extern int os_fchange_dir(int fd
);
170 extern unsigned os_major(unsigned long long dev
);
171 extern unsigned os_minor(unsigned long long dev
);
172 extern unsigned long long os_makedev(unsigned major
, unsigned minor
);
175 extern void os_early_checks(void);
176 extern void can_do_skas(void);
177 extern void os_check_bugs(void);
178 extern void check_host_supports_tls(int *supports_tls
, int *tls_min
);
181 extern int create_mem_file(unsigned long long len
);
184 extern unsigned long os_process_pc(int pid
);
185 extern int os_process_parent(int pid
);
186 extern void os_stop_process(int pid
);
187 extern void os_kill_process(int pid
, int reap_child
);
188 extern void os_kill_ptraced_process(int pid
, int reap_child
);
189 extern long os_ptrace_ldt(long pid
, long addr
, long data
);
191 extern int os_getpid(void);
192 extern int os_getpgrp(void);
194 extern void init_new_thread_signals(void);
196 extern int os_map_memory(void *virt
, int fd
, unsigned long long off
,
197 unsigned long len
, int r
, int w
, int x
);
198 extern int os_protect_memory(void *addr
, unsigned long len
,
199 int r
, int w
, int x
);
200 extern int os_unmap_memory(void *addr
, int len
);
201 extern int os_drop_memory(void *addr
, int length
);
202 extern int can_drop_memory(void);
203 extern void os_flush_stdout(void);
204 extern int os_mincore(void *addr
, unsigned long len
);
207 extern int execvp_noalloc(char *buf
, const char *file
, char *const argv
[]);
209 extern int run_helper(void (*pre_exec
)(void *), void *pre_data
, char **argv
);
210 extern int run_helper_thread(int (*proc
)(void *), void *arg
,
211 unsigned int flags
, unsigned long *stack_out
);
212 extern int helper_wait(int pid
);
216 extern int umid_file_name(char *name
, char *buf
, int len
);
217 extern int set_umid(char *name
);
218 extern char *get_umid(void);
221 extern void timer_init(void);
222 extern void set_sigstack(void *sig_stack
, int size
);
223 extern void remove_sigstack(void);
224 extern void set_handler(int sig
);
225 extern int change_sig(int signal
, int on
);
226 extern void block_signals(void);
227 extern void unblock_signals(void);
228 extern int get_signals(void);
229 extern int set_signals(int enable
);
232 extern void stack_protections(unsigned long address
);
233 extern int raw(int fd
);
234 extern void setup_machinename(char *machine_out
);
235 extern void setup_hostinfo(char *buf
, int len
);
236 extern void os_dump_core(void) __attribute__ ((noreturn
));
237 extern void um_early_printk(const char *s
, unsigned int n
);
238 extern void os_fix_helper_signals(void);
241 extern void idle_sleep(unsigned long long nsecs
);
242 extern int set_interval(void);
243 extern int timer_one_shot(int ticks
);
244 extern long long disable_timer(void);
245 extern void uml_idle_timer(void);
246 extern long long os_nsecs(void);
249 extern long run_syscall_stub(struct mm_id
* mm_idp
,
250 int syscall
, unsigned long *args
, long expected
,
251 void **addr
, int done
);
252 extern long syscall_stub_data(struct mm_id
* mm_idp
,
253 unsigned long *data
, int data_count
,
254 void **addr
, void **stub_addr
);
255 extern int map(struct mm_id
* mm_idp
, unsigned long virt
,
256 unsigned long len
, int prot
, int phys_fd
,
257 unsigned long long offset
, int done
, void **data
);
258 extern int unmap(struct mm_id
* mm_idp
, unsigned long addr
, unsigned long len
,
259 int done
, void **data
);
260 extern int protect(struct mm_id
* mm_idp
, unsigned long addr
,
261 unsigned long len
, unsigned int prot
, int done
, void **data
);
264 extern int is_skas_winch(int pid
, int fd
, void *data
);
265 extern int start_userspace(unsigned long stub_stack
);
266 extern int copy_context_skas0(unsigned long stack
, int pid
);
267 extern void userspace(struct uml_pt_regs
*regs
);
268 extern int map_stub_pages(int fd
, unsigned long code
, unsigned long data
,
269 unsigned long stack
);
270 extern void new_thread(void *stack
, jmp_buf *buf
, void (*handler
)(void));
271 extern void switch_threads(jmp_buf *me
, jmp_buf *you
);
272 extern int start_idle_thread(void *stack
, jmp_buf *switch_buf
);
273 extern void initial_thread_cb_skas(void (*proc
)(void *),
275 extern void halt_skas(void);
276 extern void reboot_skas(void);
279 extern int os_waiting_for_events(struct irq_fd
*active_fds
);
280 extern int os_create_pollfd(int fd
, int events
, void *tmp_pfd
, int size_tmpfds
);
281 extern void os_free_irq_by_cb(int (*test
)(struct irq_fd
*, void *), void *arg
,
282 struct irq_fd
*active_fds
, struct irq_fd
***last_irq_ptr2
);
283 extern void os_free_irq_later(struct irq_fd
*active_fds
,
284 int irq
, void *dev_id
);
285 extern int os_get_pollfd(int i
);
286 extern void os_set_pollfd(int i
, int fd
);
287 extern void os_set_ioignore(void);
290 extern int add_sigio_fd(int fd
);
291 extern int ignore_sigio_fd(int fd
);
292 extern void maybe_sigio_broken(int fd
, int read
);
293 extern void sigio_broken(int fd
, int read
);
295 /* sys-x86_64/prctl.c */
296 extern int os_arch_prctl(int pid
, int code
, unsigned long *addr
);
299 extern int get_pty(void);
301 /* sys-$ARCH/task_size.c */
302 extern unsigned long os_get_top_address(void);