2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
9 #include "uml-config.h"
10 #include "asm/types.h"
11 #include "../os/include/file.h"
12 #include "sysdep/ptrace.h"
13 #include "kern_util.h"
14 #include "skas/mm_id.h"
16 #include "sysdep/tls.h"
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 * types taken from stat_file() in hostfs_user.c
35 * (if they are wrong here, they are wrong there...).
38 int ust_dev
; /* device */
39 unsigned long long ust_ino
; /* inode */
40 int ust_mode
; /* protection */
41 int ust_nlink
; /* number of hard links */
42 int ust_uid
; /* user ID of owner */
43 int ust_gid
; /* group ID of owner */
44 unsigned long long ust_size
; /* total size, in bytes */
45 int ust_blksize
; /* blocksize for filesystem I/O */
46 unsigned long long ust_blocks
; /* number of blocks allocated */
47 unsigned long ust_atime
; /* time of last access */
48 unsigned long ust_mtime
; /* time of last modification */
49 unsigned long ust_ctime
; /* time of last change */
55 unsigned int s
: 1; /* O_SYNC */
56 unsigned int c
: 1; /* O_CREAT */
57 unsigned int t
: 1; /* O_TRUNC */
58 unsigned int a
: 1; /* O_APPEND */
59 unsigned int e
: 1; /* O_EXCL */
60 unsigned int cl
: 1; /* FD_CLOEXEC */
63 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
64 .t = 0, .a = 0, .e = 0, .cl = 0 })
66 static inline struct openflags
of_read(struct openflags flags
)
72 static inline struct openflags
of_write(struct openflags flags
)
78 static inline struct openflags
of_rdwr(struct openflags flags
)
80 return(of_read(of_write(flags
)));
83 static inline struct openflags
of_set_rw(struct openflags flags
, int r
, int w
)
90 static inline struct openflags
of_sync(struct openflags flags
)
96 static inline struct openflags
of_create(struct openflags flags
)
102 static inline struct openflags
of_trunc(struct openflags flags
)
108 static inline struct openflags
of_append(struct openflags flags
)
114 static inline struct openflags
of_excl(struct openflags flags
)
120 static inline struct openflags
of_cloexec(struct openflags flags
)
127 extern int os_stat_file(const char *file_name
, struct uml_stat
*buf
);
128 extern int os_stat_fd(const int fd
, struct uml_stat
*buf
);
129 extern int os_access(const char *file
, int mode
);
130 extern void os_print_error(int error
, const char* str
);
131 extern int os_get_exec_close(int fd
, int *close_on_exec
);
132 extern int os_set_exec_close(int fd
, int close_on_exec
);
133 extern int os_ioctl_generic(int fd
, unsigned int cmd
, unsigned long arg
);
134 extern int os_window_size(int fd
, int *rows
, int *cols
);
135 extern int os_new_tty_pgrp(int fd
, int pid
);
136 extern int os_get_ifname(int fd
, char *namebuf
);
137 extern int os_set_slip(int fd
);
138 extern int os_set_owner(int fd
, int pid
);
139 extern int os_sigio_async(int master
, int slave
);
140 extern int os_mode_fd(int fd
, int mode
);
142 extern int os_seek_file(int fd
, __u64 offset
);
143 extern int os_open_file(char *file
, struct openflags flags
, int mode
);
144 extern int os_read_file(int fd
, void *buf
, int len
);
145 extern int os_write_file(int fd
, const void *buf
, int count
);
146 extern int os_file_size(char *file
, unsigned long long *size_out
);
147 extern int os_file_modtime(char *file
, unsigned long *modtime
);
148 extern int os_pipe(int *fd
, int stream
, int close_on_exec
);
149 extern int os_set_fd_async(int fd
, int owner
);
150 extern int os_clear_fd_async(int fd
);
151 extern int os_set_fd_block(int fd
, int blocking
);
152 extern int os_accept_connection(int fd
);
153 extern int os_create_unix_socket(char *file
, int len
, int close_on_exec
);
154 extern int os_shutdown_socket(int fd
, int r
, int w
);
155 extern void os_close_file(int fd
);
156 extern int os_rcv_fd(int fd
, int *helper_pid_out
);
157 extern int create_unix_socket(char *file
, int len
, int close_on_exec
);
158 extern int os_connect_socket(char *name
);
159 extern int os_file_type(char *file
);
160 extern int os_file_mode(char *file
, struct openflags
*mode_out
);
161 extern int os_lock_file(int fd
, int excl
);
162 extern void os_flush_stdout(void);
163 extern int os_stat_filesystem(char *path
, long *bsize_out
,
164 long long *blocks_out
, long long *bfree_out
,
165 long long *bavail_out
, long long *files_out
,
166 long long *ffree_out
, void *fsid_out
,
167 int fsid_size
, long *namelen_out
,
169 extern int os_change_dir(char *dir
);
170 extern int os_fchange_dir(int fd
);
173 extern void os_early_checks(void);
174 extern int can_do_skas(void);
175 extern void os_check_bugs(void);
176 extern void check_host_supports_tls(int *supports_tls
, int *tls_min
);
178 /* Make sure they are clear when running in TT mode. Required by
179 * SEGV_MAYBE_FIXABLE */
180 #ifdef UML_CONFIG_MODE_SKAS
181 #define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
183 #define clear_can_do_skas() do {} while (0)
187 extern int create_mem_file(unsigned long long len
);
190 extern unsigned long os_process_pc(int pid
);
191 extern int os_process_parent(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
);
195 extern void os_usr1_process(int pid
);
196 extern long os_ptrace_ldt(long pid
, long addr
, long data
);
198 extern int os_getpid(void);
199 extern int os_getpgrp(void);
201 extern void init_new_thread_stack(void *sig_stack
, void (*usr1_handler
)(int));
202 extern void init_new_thread_signals(void);
203 extern int run_kernel_thread(int (*fn
)(void *), void *arg
, void **jmp_ptr
);
205 extern int os_map_memory(void *virt
, int fd
, unsigned long long off
,
206 unsigned long len
, int r
, int w
, int x
);
207 extern int os_protect_memory(void *addr
, unsigned long len
,
208 int r
, int w
, int x
);
209 extern int os_unmap_memory(void *addr
, int len
);
210 extern int os_drop_memory(void *addr
, int length
);
211 extern int can_drop_memory(void);
212 extern void os_flush_stdout(void);
215 * for tt mode only (will be deleted in future...)
217 extern void forward_ipi(int fd
, int pid
);
218 extern void kill_child_dead(int pid
);
219 extern void stop(void);
220 extern int wait_for_stop(int pid
, int sig
, int cont_type
, void *relay
);
221 extern int protect_memory(unsigned long addr
, unsigned long len
,
222 int r
, int w
, int x
, int must_succeed
);
223 extern void forward_pending_sigio(int target
);
224 extern int start_fork_tramp(void *arg
, unsigned long temp_stack
,
225 int clone_flags
, int (*tramp
)(void *));
228 extern unsigned long __do_user_copy(void *to
, const void *from
, int n
,
229 void **fault_addr
, void **fault_catcher
,
230 void (*op
)(void *to
, const void *from
,
231 int n
), int *faulted_out
);
234 extern int run_helper(void (*pre_exec
)(void *), void *pre_data
, char **argv
,
235 unsigned long *stack_out
);
236 extern int run_helper_thread(int (*proc
)(void *), void *arg
,
237 unsigned int flags
, unsigned long *stack_out
,
239 extern int helper_wait(int pid
);
243 extern int os_set_thread_area(user_desc_t
*info
, int pid
);
244 extern int os_get_thread_area(user_desc_t
*info
, int pid
);
247 extern int umid_file_name(char *name
, char *buf
, int len
);
248 extern int set_umid(char *name
);
249 extern char *get_umid(void);
252 extern void set_sigstack(void *sig_stack
, int size
);
253 extern void remove_sigstack(void);
254 extern void set_handler(int sig
, void (*handler
)(int), int flags
, ...);
255 extern int change_sig(int signal
, int on
);
256 extern void block_signals(void);
257 extern void unblock_signals(void);
258 extern int get_signals(void);
259 extern int set_signals(int enable
);
260 extern void os_usr1_signal(int on
);
263 extern void os_fill_handlinfo(struct kern_handlers h
);
264 extern void do_longjmp(void *p
, int val
);
267 extern void stack_protections(unsigned long address
);
268 extern void task_protections(unsigned long address
);
269 extern int raw(int fd
);
270 extern void setup_machinename(char *machine_out
);
271 extern void setup_hostinfo(void);
272 extern int setjmp_wrapper(void (*proc
)(void *, void *), ...);
275 #define BILLION (1000 * 1000 * 1000)
277 extern void switch_timers(int to_real
);
278 extern void idle_sleep(int secs
);
279 extern void enable_timer(void);
280 extern void disable_timer(void);
281 extern void user_time_init(void);
282 extern void uml_idle_timer(void);
283 extern unsigned long long os_nsecs(void);
286 extern long run_syscall_stub(struct mm_id
* mm_idp
,
287 int syscall
, unsigned long *args
, long expected
,
288 void **addr
, int done
);
289 extern long syscall_stub_data(struct mm_id
* mm_idp
,
290 unsigned long *data
, int data_count
,
291 void **addr
, void **stub_addr
);
292 extern int map(struct mm_id
* mm_idp
, unsigned long virt
,
293 unsigned long len
, int r
, int w
, int x
, int phys_fd
,
294 unsigned long long offset
, int done
, void **data
);
295 extern int unmap(struct mm_id
* mm_idp
, void *addr
, unsigned long len
,
296 int done
, void **data
);
297 extern int protect(struct mm_id
* mm_idp
, unsigned long addr
,
298 unsigned long len
, int r
, int w
, int x
, int done
,
302 extern int is_skas_winch(int pid
, int fd
, void *data
);
303 extern int start_userspace(unsigned long stub_stack
);
304 extern int copy_context_skas0(unsigned long stack
, int pid
);
305 extern void userspace(union uml_pt_regs
*regs
);
306 extern void map_stub_pages(int fd
, unsigned long code
,
307 unsigned long data
, unsigned long stack
);
308 extern void new_thread(void *stack
, void **switch_buf_ptr
,
309 void **fork_buf_ptr
, void (*handler
)(int));
310 extern void thread_wait(void *sw
, void *fb
);
311 extern void switch_threads(void *me
, void *next
);
312 extern int start_idle_thread(void *stack
, void *switch_buf_ptr
,
313 void **fork_buf_ptr
);
314 extern void initial_thread_cb_skas(void (*proc
)(void *),
316 extern void halt_skas(void);
317 extern void reboot_skas(void);
320 extern int os_waiting_for_events(struct irq_fd
*active_fds
);
321 extern int os_isatty(int fd
);
322 extern int os_create_pollfd(int fd
, int events
, void *tmp_pfd
, int size_tmpfds
);
323 extern void os_free_irq_by_cb(int (*test
)(struct irq_fd
*, void *), void *arg
,
324 struct irq_fd
*active_fds
, struct irq_fd
***last_irq_ptr2
);
325 extern void os_free_irq_later(struct irq_fd
*active_fds
,
326 int irq
, void *dev_id
);
327 extern int os_get_pollfd(int i
);
328 extern void os_set_pollfd(int i
, int fd
);
329 extern void os_set_ioignore(void);
330 extern void init_irq_signals(int on_sigstack
);
333 extern void write_sigio_workaround(void);
334 extern int add_sigio_fd(int fd
, int read
);
335 extern int ignore_sigio_fd(int fd
);
338 extern void sig_handler_common_skas(int sig
, void *sc_ptr
);
339 extern void user_signal(int sig
, union uml_pt_regs
*regs
, int pid
);