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_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
322 extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
323 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
324 extern void os_free_irq_later(struct irq_fd *active_fds,
325 int irq, void *dev_id);
326 extern int os_get_pollfd(int i);
327 extern void os_set_pollfd(int i, int fd);
328 extern void os_set_ioignore(void);
329 extern void init_irq_signals(int on_sigstack);
332 extern int ignore_sigio_fd(int fd);
333 extern void maybe_sigio_broken(int fd, int read);
336 extern void sig_handler_common_skas(int sig, void *sc_ptr);
337 extern void user_signal(int sig, union uml_pt_regs *regs, int pid);