os.h 11 KB

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  1. /*
  2. * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
  3. * Licensed under the GPL
  4. */
  5. #ifndef __OS_H__
  6. #define __OS_H__
  7. #include "uml-config.h"
  8. #include "asm/types.h"
  9. #include "../os/include/file.h"
  10. #include "sysdep/ptrace.h"
  11. #include "kern_util.h"
  12. #include "skas/mm_id.h"
  13. #include "irq_user.h"
  14. #include "sysdep/tls.h"
  15. #include "sysdep/archsetjmp.h"
  16. #define OS_TYPE_FILE 1
  17. #define OS_TYPE_DIR 2
  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
  23. /* os_access() flags */
  24. #define OS_ACC_F_OK 0 /* Test for existence. */
  25. #define OS_ACC_X_OK 1 /* Test for execute permission. */
  26. #define OS_ACC_W_OK 2 /* Test for write permission. */
  27. #define OS_ACC_R_OK 4 /* Test for read permission. */
  28. #define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
  29. /*
  30. * types taken from stat_file() in hostfs_user.c
  31. * (if they are wrong here, they are wrong there...).
  32. */
  33. struct uml_stat {
  34. int ust_dev; /* device */
  35. unsigned long long ust_ino; /* inode */
  36. int ust_mode; /* protection */
  37. int ust_nlink; /* number of hard links */
  38. int ust_uid; /* user ID of owner */
  39. int ust_gid; /* group ID of owner */
  40. unsigned long long ust_size; /* total size, in bytes */
  41. int ust_blksize; /* blocksize for filesystem I/O */
  42. unsigned long long ust_blocks; /* number of blocks allocated */
  43. unsigned long ust_atime; /* time of last access */
  44. unsigned long ust_mtime; /* time of last modification */
  45. unsigned long ust_ctime; /* time of last change */
  46. };
  47. struct openflags {
  48. unsigned int r : 1;
  49. unsigned int w : 1;
  50. unsigned int s : 1; /* O_SYNC */
  51. unsigned int c : 1; /* O_CREAT */
  52. unsigned int t : 1; /* O_TRUNC */
  53. unsigned int a : 1; /* O_APPEND */
  54. unsigned int e : 1; /* O_EXCL */
  55. unsigned int cl : 1; /* FD_CLOEXEC */
  56. };
  57. #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
  58. .t = 0, .a = 0, .e = 0, .cl = 0 })
  59. static inline struct openflags of_read(struct openflags flags)
  60. {
  61. flags.r = 1;
  62. return flags;
  63. }
  64. static inline struct openflags of_write(struct openflags flags)
  65. {
  66. flags.w = 1;
  67. return flags;
  68. }
  69. static inline struct openflags of_rdwr(struct openflags flags)
  70. {
  71. return of_read(of_write(flags));
  72. }
  73. static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
  74. {
  75. flags.r = r;
  76. flags.w = w;
  77. return flags;
  78. }
  79. static inline struct openflags of_sync(struct openflags flags)
  80. {
  81. flags.s = 1;
  82. return flags;
  83. }
  84. static inline struct openflags of_create(struct openflags flags)
  85. {
  86. flags.c = 1;
  87. return flags;
  88. }
  89. static inline struct openflags of_trunc(struct openflags flags)
  90. {
  91. flags.t = 1;
  92. return flags;
  93. }
  94. static inline struct openflags of_append(struct openflags flags)
  95. {
  96. flags.a = 1;
  97. return flags;
  98. }
  99. static inline struct openflags of_excl(struct openflags flags)
  100. {
  101. flags.e = 1;
  102. return flags;
  103. }
  104. static inline struct openflags of_cloexec(struct openflags flags)
  105. {
  106. flags.cl = 1;
  107. return flags;
  108. }
  109. /* file.c */
  110. extern int os_stat_file(const char *file_name, struct uml_stat *buf);
  111. extern int os_stat_fd(const int fd, struct uml_stat *buf);
  112. extern int os_access(const char *file, int mode);
  113. extern void os_print_error(int error, const char* str);
  114. extern int os_get_exec_close(int fd, int *close_on_exec);
  115. extern int os_set_exec_close(int fd, int close_on_exec);
  116. extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
  117. extern int os_window_size(int fd, int *rows, int *cols);
  118. extern int os_new_tty_pgrp(int fd, int pid);
  119. extern int os_get_ifname(int fd, char *namebuf);
  120. extern int os_set_slip(int fd);
  121. extern int os_set_owner(int fd, int pid);
  122. extern int os_mode_fd(int fd, int mode);
  123. extern int os_seek_file(int fd, __u64 offset);
  124. extern int os_open_file(char *file, struct openflags flags, int mode);
  125. extern int os_read_file(int fd, void *buf, int len);
  126. extern int os_write_file(int fd, const void *buf, int count);
  127. extern int os_file_size(char *file, unsigned long long *size_out);
  128. extern int os_file_modtime(char *file, unsigned long *modtime);
  129. extern int os_pipe(int *fd, int stream, int close_on_exec);
  130. extern int os_set_fd_async(int fd, int owner);
  131. extern int os_clear_fd_async(int fd);
  132. extern int os_set_fd_block(int fd, int blocking);
  133. extern int os_accept_connection(int fd);
  134. extern int os_create_unix_socket(char *file, int len, int close_on_exec);
  135. extern int os_shutdown_socket(int fd, int r, int w);
  136. extern void os_close_file(int fd);
  137. extern int os_rcv_fd(int fd, int *helper_pid_out);
  138. extern int create_unix_socket(char *file, int len, int close_on_exec);
  139. extern int os_connect_socket(char *name);
  140. extern int os_file_type(char *file);
  141. extern int os_file_mode(char *file, struct openflags *mode_out);
  142. extern int os_lock_file(int fd, int excl);
  143. extern void os_flush_stdout(void);
  144. extern int os_stat_filesystem(char *path, long *bsize_out,
  145. long long *blocks_out, long long *bfree_out,
  146. long long *bavail_out, long long *files_out,
  147. long long *ffree_out, void *fsid_out,
  148. int fsid_size, long *namelen_out,
  149. long *spare_out);
  150. extern int os_change_dir(char *dir);
  151. extern int os_fchange_dir(int fd);
  152. /* start_up.c */
  153. extern void os_early_checks(void);
  154. extern int can_do_skas(void);
  155. extern void os_check_bugs(void);
  156. extern void check_host_supports_tls(int *supports_tls, int *tls_min);
  157. /* Make sure they are clear when running in TT mode. Required by
  158. * SEGV_MAYBE_FIXABLE */
  159. #ifdef UML_CONFIG_MODE_SKAS
  160. #define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
  161. #else
  162. #define clear_can_do_skas() do {} while (0)
  163. #endif
  164. /* mem.c */
  165. extern int create_mem_file(unsigned long long len);
  166. /* process.c */
  167. extern unsigned long os_process_pc(int pid);
  168. extern int os_process_parent(int pid);
  169. extern void os_stop_process(int pid);
  170. extern void os_kill_process(int pid, int reap_child);
  171. extern void os_kill_ptraced_process(int pid, int reap_child);
  172. #ifdef UML_CONFIG_MODE_TT
  173. extern void os_usr1_process(int pid);
  174. #endif
  175. extern long os_ptrace_ldt(long pid, long addr, long data);
  176. extern int os_getpid(void);
  177. extern int os_getpgrp(void);
  178. #ifdef UML_CONFIG_MODE_TT
  179. extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
  180. extern void stop(void);
  181. #endif
  182. extern void init_new_thread_signals(void);
  183. extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
  184. extern int os_map_memory(void *virt, int fd, unsigned long long off,
  185. unsigned long len, int r, int w, int x);
  186. extern int os_protect_memory(void *addr, unsigned long len,
  187. int r, int w, int x);
  188. extern int os_unmap_memory(void *addr, int len);
  189. extern int os_drop_memory(void *addr, int length);
  190. extern int can_drop_memory(void);
  191. extern void os_flush_stdout(void);
  192. /* tt.c
  193. * for tt mode only (will be deleted in future...)
  194. */
  195. extern void forward_ipi(int fd, int pid);
  196. extern void kill_child_dead(int pid);
  197. extern int wait_for_stop(int pid, int sig, int cont_type, void *relay);
  198. extern int protect_memory(unsigned long addr, unsigned long len,
  199. int r, int w, int x, int must_succeed);
  200. extern void forward_pending_sigio(int target);
  201. extern int start_fork_tramp(void *arg, unsigned long temp_stack,
  202. int clone_flags, int (*tramp)(void *));
  203. /* uaccess.c */
  204. extern unsigned long __do_user_copy(void *to, const void *from, int n,
  205. void **fault_addr, void **fault_catcher,
  206. void (*op)(void *to, const void *from,
  207. int n), int *faulted_out);
  208. /* execvp.c */
  209. extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
  210. /* helper.c */
  211. extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
  212. unsigned long *stack_out);
  213. extern int run_helper_thread(int (*proc)(void *), void *arg,
  214. unsigned int flags, unsigned long *stack_out,
  215. int stack_order);
  216. extern int helper_wait(int pid);
  217. /* tls.c */
  218. extern int os_set_thread_area(user_desc_t *info, int pid);
  219. extern int os_get_thread_area(user_desc_t *info, int pid);
  220. /* umid.c */
  221. extern int umid_file_name(char *name, char *buf, int len);
  222. extern int set_umid(char *name);
  223. extern char *get_umid(void);
  224. /* signal.c */
  225. extern void set_sigstack(void *sig_stack, int size);
  226. extern void remove_sigstack(void);
  227. extern void set_handler(int sig, void (*handler)(int), int flags, ...);
  228. extern int change_sig(int signal, int on);
  229. extern void block_signals(void);
  230. extern void unblock_signals(void);
  231. extern int get_signals(void);
  232. extern int set_signals(int enable);
  233. /* trap.c */
  234. extern void os_fill_handlinfo(struct kern_handlers h);
  235. extern void do_longjmp(void *p, int val);
  236. /* util.c */
  237. extern void stack_protections(unsigned long address);
  238. extern void task_protections(unsigned long address);
  239. extern int raw(int fd);
  240. extern void setup_machinename(char *machine_out);
  241. extern void setup_hostinfo(void);
  242. extern int setjmp_wrapper(void (*proc)(void *, void *), ...);
  243. /* time.c */
  244. #define BILLION (1000 * 1000 * 1000)
  245. extern void switch_timers(int to_real);
  246. extern void idle_sleep(int secs);
  247. extern int set_interval(int is_virtual);
  248. #ifdef CONFIG_MODE_TT
  249. extern void enable_timer(void);
  250. #endif
  251. extern void disable_timer(void);
  252. extern void uml_idle_timer(void);
  253. extern unsigned long long os_nsecs(void);
  254. /* skas/mem.c */
  255. extern long run_syscall_stub(struct mm_id * mm_idp,
  256. int syscall, unsigned long *args, long expected,
  257. void **addr, int done);
  258. extern long syscall_stub_data(struct mm_id * mm_idp,
  259. unsigned long *data, int data_count,
  260. void **addr, void **stub_addr);
  261. extern int map(struct mm_id * mm_idp, unsigned long virt,
  262. unsigned long len, int r, int w, int x, int phys_fd,
  263. unsigned long long offset, int done, void **data);
  264. extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len,
  265. int done, void **data);
  266. extern int protect(struct mm_id * mm_idp, unsigned long addr,
  267. unsigned long len, int r, int w, int x, int done,
  268. void **data);
  269. /* skas/process.c */
  270. extern int is_skas_winch(int pid, int fd, void *data);
  271. extern int start_userspace(unsigned long stub_stack);
  272. extern int copy_context_skas0(unsigned long stack, int pid);
  273. extern void userspace(union uml_pt_regs *regs);
  274. extern void map_stub_pages(int fd, unsigned long code,
  275. unsigned long data, unsigned long stack);
  276. extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
  277. extern void switch_threads(jmp_buf *me, jmp_buf *you);
  278. extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
  279. extern void initial_thread_cb_skas(void (*proc)(void *),
  280. void *arg);
  281. extern void halt_skas(void);
  282. extern void reboot_skas(void);
  283. /* irq.c */
  284. extern int os_waiting_for_events(struct irq_fd *active_fds);
  285. extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
  286. extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
  287. struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
  288. extern void os_free_irq_later(struct irq_fd *active_fds,
  289. int irq, void *dev_id);
  290. extern int os_get_pollfd(int i);
  291. extern void os_set_pollfd(int i, int fd);
  292. extern void os_set_ioignore(void);
  293. extern void init_irq_signals(int on_sigstack);
  294. /* sigio.c */
  295. extern int add_sigio_fd(int fd);
  296. extern int ignore_sigio_fd(int fd);
  297. extern void maybe_sigio_broken(int fd, int read);
  298. /* skas/trap */
  299. extern void sig_handler_common_skas(int sig, void *sc_ptr);
  300. extern void user_signal(int sig, union uml_pt_regs *regs, int pid);
  301. extern int os_arch_prctl(int pid, int code, unsigned long *addr);
  302. #endif