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 #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 * types taken from stat_file() in hostfs_user.c
33 * (if they are wrong here, they are wrong there...).
36 int ust_dev; /* device */
37 unsigned long long ust_ino; /* inode */
38 int ust_mode; /* protection */
39 int ust_nlink; /* number of hard links */
40 int ust_uid; /* user ID of owner */
41 int ust_gid; /* group ID of owner */
42 unsigned long long ust_size; /* total size, in bytes */
43 int ust_blksize; /* blocksize for filesystem I/O */
44 unsigned long long ust_blocks; /* number of blocks allocated */
45 unsigned long ust_atime; /* time of last access */
46 unsigned long ust_mtime; /* time of last modification */
47 unsigned long ust_ctime; /* time of last change */
53 unsigned int s : 1; /* O_SYNC */
54 unsigned int c : 1; /* O_CREAT */
55 unsigned int t : 1; /* O_TRUNC */
56 unsigned int a : 1; /* O_APPEND */
57 unsigned int e : 1; /* O_EXCL */
58 unsigned int cl : 1; /* FD_CLOEXEC */
61 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
62 .t = 0, .a = 0, .e = 0, .cl = 0 })
64 static inline struct openflags of_read(struct openflags flags)
70 static inline struct openflags of_write(struct openflags flags)
76 static inline struct openflags of_rdwr(struct openflags flags)
78 return(of_read(of_write(flags)));
81 static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
88 static inline struct openflags of_sync(struct openflags flags)
94 static inline struct openflags of_create(struct openflags flags)
100 static inline struct openflags of_trunc(struct openflags flags)
106 static inline struct openflags of_append(struct openflags flags)
112 static inline struct openflags of_excl(struct openflags flags)
118 static inline struct openflags of_cloexec(struct openflags flags)
124 extern int os_stat_file(const char *file_name, struct uml_stat *buf);
125 extern int os_stat_fd(const int fd, struct uml_stat *buf);
126 extern int os_access(const char *file, int mode);
127 extern void os_print_error(int error, const char* str);
128 extern int os_get_exec_close(int fd, int *close_on_exec);
129 extern int os_set_exec_close(int fd, int close_on_exec);
130 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
131 extern int os_window_size(int fd, int *rows, int *cols);
132 extern int os_new_tty_pgrp(int fd, int pid);
133 extern int os_get_ifname(int fd, char *namebuf);
134 extern int os_set_slip(int fd);
135 extern int os_set_owner(int fd, int pid);
136 extern int os_sigio_async(int master, int slave);
137 extern int os_mode_fd(int fd, int mode);
139 extern int os_seek_file(int fd, __u64 offset);
140 extern int os_open_file(char *file, struct openflags flags, int mode);
141 extern int os_read_file(int fd, void *buf, int len);
142 extern int os_write_file(int fd, const void *buf, int count);
143 extern int os_file_size(char *file, unsigned long long *size_out);
144 extern int os_file_modtime(char *file, unsigned long *modtime);
145 extern int os_pipe(int *fd, int stream, int close_on_exec);
146 extern int os_set_fd_async(int fd, int owner);
147 extern int os_clear_fd_async(int fd);
148 extern int os_set_fd_block(int fd, int blocking);
149 extern int os_accept_connection(int fd);
150 extern int os_create_unix_socket(char *file, int len, int close_on_exec);
151 extern int os_shutdown_socket(int fd, int r, int w);
152 extern void os_close_file(int fd);
153 extern int os_rcv_fd(int fd, int *helper_pid_out);
154 extern int create_unix_socket(char *file, int len, int close_on_exec);
155 extern int os_connect_socket(char *name);
156 extern int os_file_type(char *file);
157 extern int os_file_mode(char *file, struct openflags *mode_out);
158 extern int os_lock_file(int fd, int excl);
161 extern void os_early_checks(void);
162 extern int can_do_skas(void);
164 /* Make sure they are clear when running in TT mode. Required by
165 * SEGV_MAYBE_FIXABLE */
166 #ifdef UML_CONFIG_MODE_SKAS
167 #define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
169 #define clear_can_do_skas() do {} while (0)
173 extern int create_mem_file(unsigned long long len);
176 extern unsigned long os_process_pc(int pid);
177 extern int os_process_parent(int pid);
178 extern void os_stop_process(int pid);
179 extern void os_kill_process(int pid, int reap_child);
180 extern void os_kill_ptraced_process(int pid, int reap_child);
181 extern void os_usr1_process(int pid);
182 extern long os_ptrace_ldt(long pid, long addr, long data);
184 extern int os_getpid(void);
185 extern int os_getpgrp(void);
187 extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
188 extern void init_new_thread_signals(int altstack);
189 extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
191 extern int os_map_memory(void *virt, int fd, unsigned long long off,
192 unsigned long len, int r, int w, int x);
193 extern int os_protect_memory(void *addr, unsigned long len,
194 int r, int w, int x);
195 extern int os_unmap_memory(void *addr, int len);
196 extern void os_flush_stdout(void);
199 * for tt mode only (will be deleted in future...)
201 extern void stop(void);
202 extern int wait_for_stop(int pid, int sig, int cont_type, void *relay);
203 extern int protect_memory(unsigned long addr, unsigned long len,
204 int r, int w, int x, int must_succeed);
205 extern void forward_pending_sigio(int target);
206 extern int start_fork_tramp(void *arg, unsigned long temp_stack,
207 int clone_flags, int (*tramp)(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 run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
217 unsigned long *stack_out);
218 extern int run_helper_thread(int (*proc)(void *), void *arg,
219 unsigned int flags, unsigned long *stack_out,
221 extern int helper_wait(int pid);
225 extern int umid_file_name(char *name, char *buf, int len);
226 extern int set_umid(char *name);
227 extern char *get_umid(void);
230 extern void set_sigstack(void *sig_stack, int size);
231 extern void remove_sigstack(void);
232 extern void set_handler(int sig, void (*handler)(int), int flags, ...);
233 extern int change_sig(int signal, int on);
234 extern void block_signals(void);
235 extern void unblock_signals(void);
236 extern int get_signals(void);
237 extern int set_signals(int enable);
238 extern void os_usr1_signal(int on);
241 extern void os_fill_handlinfo(struct kern_handlers h);
242 extern void do_longjmp(void *p, int val);
245 extern void stack_protections(unsigned long address);
246 extern void task_protections(unsigned long address);
247 extern int raw(int fd);
248 extern void setup_machinename(char *machine_out);
249 extern void setup_hostinfo(void);
250 extern int setjmp_wrapper(void (*proc)(void *, void *), ...);
253 #define BILLION (1000 * 1000 * 1000)
255 extern void switch_timers(int to_real);
256 extern void idle_sleep(int secs);
257 extern void enable_timer(void);
258 extern void disable_timer(void);
259 extern void user_time_init(void);
260 extern void uml_idle_timer(void);
261 extern unsigned long long os_nsecs(void);
264 extern long run_syscall_stub(struct mm_id * mm_idp,
265 int syscall, unsigned long *args, long expected,
266 void **addr, int done);
267 extern long syscall_stub_data(struct mm_id * mm_idp,
268 unsigned long *data, int data_count,
269 void **addr, void **stub_addr);
270 extern int map(struct mm_id * mm_idp, unsigned long virt,
271 unsigned long len, int r, int w, int x, int phys_fd,
272 unsigned long long offset, int done, void **data);
273 extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len,
274 int done, void **data);
275 extern int protect(struct mm_id * mm_idp, unsigned long addr,
276 unsigned long len, int r, int w, int x, int done,
280 extern int is_skas_winch(int pid, int fd, void *data);
281 extern int start_userspace(unsigned long stub_stack);
282 extern int copy_context_skas0(unsigned long stack, int pid);
283 extern void userspace(union uml_pt_regs *regs);
284 extern void map_stub_pages(int fd, unsigned long code,
285 unsigned long data, unsigned long stack);
286 extern void new_thread(void *stack, void **switch_buf_ptr,
287 void **fork_buf_ptr, void (*handler)(int));
288 extern void thread_wait(void *sw, void *fb);
289 extern void switch_threads(void *me, void *next);
290 extern int start_idle_thread(void *stack, void *switch_buf_ptr,
291 void **fork_buf_ptr);
292 extern void initial_thread_cb_skas(void (*proc)(void *),
294 extern void halt_skas(void);
295 extern void reboot_skas(void);