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"
17 #include "sysdep/archsetjmp.h"
19 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
21 #define OS_TYPE_FILE 1
23 #define OS_TYPE_SYMLINK 3
24 #define OS_TYPE_CHARDEV 4
25 #define OS_TYPE_BLOCKDEV 5
26 #define OS_TYPE_FIFO 6
27 #define OS_TYPE_SOCK 7
29 /* os_access() flags */
30 #define OS_ACC_F_OK 0 /* Test for existence. */
31 #define OS_ACC_X_OK 1 /* Test for execute permission. */
32 #define OS_ACC_W_OK 2 /* Test for write permission. */
33 #define OS_ACC_R_OK 4 /* Test for read permission. */
34 #define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
37 * types taken from stat_file() in hostfs_user.c
38 * (if they are wrong here, they are wrong there...).
41 int ust_dev
; /* device */
42 unsigned long long ust_ino
; /* inode */
43 int ust_mode
; /* protection */
44 int ust_nlink
; /* number of hard links */
45 int ust_uid
; /* user ID of owner */
46 int ust_gid
; /* group ID of owner */
47 unsigned long long ust_size
; /* total size, in bytes */
48 int ust_blksize
; /* blocksize for filesystem I/O */
49 unsigned long long ust_blocks
; /* number of blocks allocated */
50 unsigned long ust_atime
; /* time of last access */
51 unsigned long ust_mtime
; /* time of last modification */
52 unsigned long ust_ctime
; /* time of last change */
58 unsigned int s
: 1; /* O_SYNC */
59 unsigned int c
: 1; /* O_CREAT */
60 unsigned int t
: 1; /* O_TRUNC */
61 unsigned int a
: 1; /* O_APPEND */
62 unsigned int e
: 1; /* O_EXCL */
63 unsigned int cl
: 1; /* FD_CLOEXEC */
66 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
67 .t = 0, .a = 0, .e = 0, .cl = 0 })
69 static inline struct openflags
of_read(struct openflags flags
)
75 static inline struct openflags
of_write(struct openflags flags
)
81 static inline struct openflags
of_rdwr(struct openflags flags
)
83 return of_read(of_write(flags
));
86 static inline struct openflags
of_set_rw(struct openflags flags
, int r
, int w
)
93 static inline struct openflags
of_sync(struct openflags flags
)
99 static inline struct openflags
of_create(struct openflags flags
)
105 static inline struct openflags
of_trunc(struct openflags flags
)
111 static inline struct openflags
of_append(struct openflags flags
)
117 static inline struct openflags
of_excl(struct openflags flags
)
123 static inline struct openflags
of_cloexec(struct openflags flags
)
130 extern int os_stat_file(const char *file_name
, struct uml_stat
*buf
);
131 extern int os_stat_fd(const int fd
, struct uml_stat
*buf
);
132 extern int os_access(const char *file
, int mode
);
133 extern void os_print_error(int error
, const char* str
);
134 extern int os_get_exec_close(int fd
, int *close_on_exec
);
135 extern int os_set_exec_close(int fd
, int close_on_exec
);
136 extern int os_ioctl_generic(int fd
, unsigned int cmd
, unsigned long arg
);
137 extern int os_new_tty_pgrp(int fd
, int pid
);
138 extern int os_get_ifname(int fd
, char *namebuf
);
139 extern int os_set_slip(int fd
);
140 extern int os_set_owner(int fd
, int pid
);
141 extern int os_mode_fd(int fd
, int mode
);
143 extern int os_seek_file(int fd
, __u64 offset
);
144 extern int os_open_file(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_file_size(char *file
, unsigned long long *size_out
);
148 extern int os_file_modtime(char *file
, unsigned long *modtime
);
149 extern int os_pipe(int *fd
, int stream
, int close_on_exec
);
150 extern int os_set_fd_async(int fd
, int owner
);
151 extern int os_clear_fd_async(int fd
);
152 extern int os_set_fd_block(int fd
, int blocking
);
153 extern int os_accept_connection(int fd
);
154 extern int os_create_unix_socket(char *file
, int len
, int close_on_exec
);
155 extern int os_shutdown_socket(int fd
, int r
, int w
);
156 extern void os_close_file(int fd
);
157 extern int os_rcv_fd(int fd
, int *helper_pid_out
);
158 extern int create_unix_socket(char *file
, int len
, int close_on_exec
);
159 extern int os_connect_socket(char *name
);
160 extern int os_file_type(char *file
);
161 extern int os_file_mode(char *file
, struct openflags
*mode_out
);
162 extern int os_lock_file(int fd
, int excl
);
163 extern void os_flush_stdout(void);
164 extern int os_stat_filesystem(char *path
, long *bsize_out
,
165 long long *blocks_out
, long long *bfree_out
,
166 long long *bavail_out
, long long *files_out
,
167 long long *ffree_out
, void *fsid_out
,
168 int fsid_size
, long *namelen_out
,
170 extern int os_change_dir(char *dir
);
171 extern int os_fchange_dir(int fd
);
174 extern void os_early_checks(void);
175 extern int can_do_skas(void);
176 extern void os_check_bugs(void);
177 extern void check_host_supports_tls(int *supports_tls
, int *tls_min
);
179 /* Make sure they are clear when running in TT mode. Required by
180 * SEGV_MAYBE_FIXABLE */
181 #define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
184 extern int create_mem_file(unsigned long long len
);
187 extern unsigned long os_process_pc(int pid
);
188 extern int os_process_parent(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 extern long os_ptrace_ldt(long pid
, long addr
, long data
);
194 extern int os_getpid(void);
195 extern int os_getpgrp(void);
197 extern void init_new_thread_signals(void);
198 extern int run_kernel_thread(int (*fn
)(void *), void *arg
, void **jmp_ptr
);
200 extern int os_map_memory(void *virt
, int fd
, unsigned long long off
,
201 unsigned long len
, int r
, int w
, int x
);
202 extern int os_protect_memory(void *addr
, unsigned long len
,
203 int r
, int w
, int x
);
204 extern int os_unmap_memory(void *addr
, int len
);
205 extern int os_drop_memory(void *addr
, int length
);
206 extern int can_drop_memory(void);
207 extern void os_flush_stdout(void);
210 extern unsigned long __do_user_copy(void *to
, const void *from
, int n
,
211 void **fault_addr
, void **fault_catcher
,
212 void (*op
)(void *to
, const void *from
,
213 int n
), int *faulted_out
);
216 extern int execvp_noalloc(char *buf
, const char *file
, char *const argv
[]);
218 extern int run_helper(void (*pre_exec
)(void *), void *pre_data
, char **argv
);
219 extern int run_helper_thread(int (*proc
)(void *), void *arg
,
220 unsigned int flags
, unsigned long *stack_out
);
221 extern int helper_wait(int pid
);
225 extern int os_set_thread_area(user_desc_t
*info
, int pid
);
226 extern int os_get_thread_area(user_desc_t
*info
, int pid
);
229 extern int umid_file_name(char *name
, char *buf
, int len
);
230 extern int set_umid(char *name
);
231 extern char *get_umid(void);
234 extern void set_sigstack(void *sig_stack
, int size
);
235 extern void remove_sigstack(void);
236 extern void set_handler(int sig
, void (*handler
)(int), int flags
, ...);
237 extern int change_sig(int signal
, int on
);
238 extern void block_signals(void);
239 extern void unblock_signals(void);
240 extern int get_signals(void);
241 extern int set_signals(int enable
);
244 extern void os_fill_handlinfo(struct kern_handlers h
);
245 extern void do_longjmp(void *p
, int val
);
248 extern void stack_protections(unsigned long address
);
249 extern int raw(int fd
);
250 extern void setup_machinename(char *machine_out
);
251 extern void setup_hostinfo(char *buf
, int len
);
252 extern int setjmp_wrapper(void (*proc
)(void *, void *), ...);
253 extern void os_dump_core(void);
256 #define BILLION (1000 * 1000 * 1000)
258 extern void switch_timers(int to_real
);
259 extern void idle_sleep(int secs
);
260 extern int set_interval(int is_virtual
);
261 extern void disable_timer(void);
262 extern void uml_idle_timer(void);
263 extern unsigned long long os_nsecs(void);
266 extern long run_syscall_stub(struct mm_id
* mm_idp
,
267 int syscall
, unsigned long *args
, long expected
,
268 void **addr
, int done
);
269 extern long syscall_stub_data(struct mm_id
* mm_idp
,
270 unsigned long *data
, int data_count
,
271 void **addr
, void **stub_addr
);
272 extern int map(struct mm_id
* mm_idp
, unsigned long virt
,
273 unsigned long len
, int prot
, int phys_fd
,
274 unsigned long long offset
, int done
, void **data
);
275 extern int unmap(struct mm_id
* mm_idp
, unsigned long addr
, unsigned long len
,
276 int done
, void **data
);
277 extern int protect(struct mm_id
* mm_idp
, unsigned long addr
,
278 unsigned long len
, unsigned int prot
, int done
, void **data
);
281 extern int is_skas_winch(int pid
, int fd
, void *data
);
282 extern int start_userspace(unsigned long stub_stack
);
283 extern int copy_context_skas0(unsigned long stack
, int pid
);
284 extern void save_registers(int pid
, union uml_pt_regs
*regs
);
285 extern void restore_registers(int pid
, union uml_pt_regs
*regs
);
286 extern void userspace(union uml_pt_regs
*regs
);
287 extern void map_stub_pages(int fd
, unsigned long code
,
288 unsigned long data
, unsigned long stack
);
289 extern void new_thread(void *stack
, jmp_buf *buf
, void (*handler
)(void));
290 extern void switch_threads(jmp_buf *me
, jmp_buf *you
);
291 extern int start_idle_thread(void *stack
, jmp_buf *switch_buf
);
292 extern void initial_thread_cb_skas(void (*proc
)(void *),
294 extern void halt_skas(void);
295 extern void reboot_skas(void);
298 extern int os_waiting_for_events(struct irq_fd
*active_fds
);
299 extern int os_create_pollfd(int fd
, int events
, void *tmp_pfd
, int size_tmpfds
);
300 extern void os_free_irq_by_cb(int (*test
)(struct irq_fd
*, void *), void *arg
,
301 struct irq_fd
*active_fds
, struct irq_fd
***last_irq_ptr2
);
302 extern void os_free_irq_later(struct irq_fd
*active_fds
,
303 int irq
, void *dev_id
);
304 extern int os_get_pollfd(int i
);
305 extern void os_set_pollfd(int i
, int fd
);
306 extern void os_set_ioignore(void);
307 extern void init_irq_signals(int on_sigstack
);
310 extern int add_sigio_fd(int fd
);
311 extern int ignore_sigio_fd(int fd
);
312 extern void maybe_sigio_broken(int fd
, int read
);
315 extern void sig_handler_common_skas(int sig
, void *sc_ptr
);
317 /* sys-x86_64/prctl.c */
318 extern int os_arch_prctl(int pid
, int code
, unsigned long *addr
);
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