Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) |
| 3 | * Licensed under the GPL |
| 4 | */ |
| 5 | |
| 6 | #ifndef __OS_H__ |
| 7 | #define __OS_H__ |
| 8 | |
Paolo 'Blaisorblade' Giarrusso | 9d624ea | 2005-10-11 21:01:01 +0200 | [diff] [blame] | 9 | #include "uml-config.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include "asm/types.h" |
| 11 | #include "../os/include/file.h" |
Gennady Sharapov | ea2ba7d | 2006-01-08 01:01:31 -0800 | [diff] [blame] | 12 | #include "sysdep/ptrace.h" |
| 13 | #include "kern_util.h" |
Gennady Sharapov | f45d9fc | 2006-01-18 17:42:45 -0800 | [diff] [blame] | 14 | #include "skas/mm_id.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 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 | |
| 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 */ |
| 30 | |
| 31 | /* |
| 32 | * types taken from stat_file() in hostfs_user.c |
| 33 | * (if they are wrong here, they are wrong there...). |
| 34 | */ |
| 35 | struct uml_stat { |
| 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 */ |
| 48 | }; |
| 49 | |
| 50 | struct openflags { |
| 51 | unsigned int r : 1; |
| 52 | unsigned int w : 1; |
| 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 */ |
| 59 | }; |
| 60 | |
| 61 | #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \ |
| 62 | .t = 0, .a = 0, .e = 0, .cl = 0 }) |
| 63 | |
| 64 | static inline struct openflags of_read(struct openflags flags) |
| 65 | { |
| 66 | flags.r = 1; |
| 67 | return(flags); |
| 68 | } |
| 69 | |
| 70 | static inline struct openflags of_write(struct openflags flags) |
| 71 | { |
| 72 | flags.w = 1; |
| 73 | return(flags); |
| 74 | } |
| 75 | |
| 76 | static inline struct openflags of_rdwr(struct openflags flags) |
| 77 | { |
| 78 | return(of_read(of_write(flags))); |
| 79 | } |
| 80 | |
| 81 | static inline struct openflags of_set_rw(struct openflags flags, int r, int w) |
| 82 | { |
| 83 | flags.r = r; |
| 84 | flags.w = w; |
| 85 | return(flags); |
| 86 | } |
| 87 | |
| 88 | static inline struct openflags of_sync(struct openflags flags) |
| 89 | { |
| 90 | flags.s = 1; |
| 91 | return(flags); |
| 92 | } |
| 93 | |
| 94 | static inline struct openflags of_create(struct openflags flags) |
| 95 | { |
| 96 | flags.c = 1; |
| 97 | return(flags); |
| 98 | } |
| 99 | |
| 100 | static inline struct openflags of_trunc(struct openflags flags) |
| 101 | { |
| 102 | flags.t = 1; |
| 103 | return(flags); |
| 104 | } |
| 105 | |
| 106 | static inline struct openflags of_append(struct openflags flags) |
| 107 | { |
| 108 | flags.a = 1; |
| 109 | return(flags); |
| 110 | } |
| 111 | |
| 112 | static inline struct openflags of_excl(struct openflags flags) |
| 113 | { |
| 114 | flags.e = 1; |
| 115 | return(flags); |
| 116 | } |
| 117 | |
| 118 | static inline struct openflags of_cloexec(struct openflags flags) |
| 119 | { |
| 120 | flags.cl = 1; |
| 121 | return(flags); |
| 122 | } |
| 123 | |
| 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); |
| 138 | |
| 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); |
Jeff Dike | da00d9a | 2005-06-08 15:48:01 -0700 | [diff] [blame] | 143 | extern int os_file_size(char *file, unsigned long long *size_out); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
| 159 | |
Gennady Sharapov | 60d339f | 2005-09-03 15:57:47 -0700 | [diff] [blame] | 160 | /* start_up.c */ |
| 161 | extern void os_early_checks(void); |
| 162 | extern int can_do_skas(void); |
| 163 | |
Paolo 'Blaisorblade' Giarrusso | 8923648 | 2005-09-30 11:59:00 -0700 | [diff] [blame] | 164 | /* Make sure they are clear when running in TT mode. Required by |
| 165 | * SEGV_MAYBE_FIXABLE */ |
Paolo 'Blaisorblade' Giarrusso | 9d624ea | 2005-10-11 21:01:01 +0200 | [diff] [blame] | 166 | #ifdef UML_CONFIG_MODE_SKAS |
Paolo 'Blaisorblade' Giarrusso | 8923648 | 2005-09-30 11:59:00 -0700 | [diff] [blame] | 167 | #define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0) |
Paolo 'Blaisorblade' Giarrusso | 9d624ea | 2005-10-11 21:01:01 +0200 | [diff] [blame] | 168 | #else |
| 169 | #define clear_can_do_skas() do {} while (0) |
| 170 | #endif |
Paolo 'Blaisorblade' Giarrusso | 8923648 | 2005-09-30 11:59:00 -0700 | [diff] [blame] | 171 | |
Jeff Dike | 0f80bc8 | 2005-09-16 19:27:50 -0700 | [diff] [blame] | 172 | /* mem.c */ |
Jeff Dike | ae17381 | 2005-11-07 00:58:57 -0800 | [diff] [blame] | 173 | extern int create_mem_file(unsigned long long len); |
Jeff Dike | 0f80bc8 | 2005-09-16 19:27:50 -0700 | [diff] [blame] | 174 | |
Gennady Sharapov | 60d339f | 2005-09-03 15:57:47 -0700 | [diff] [blame] | 175 | /* process.c */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 int os_getpid(void); |
Jeff Dike | cd2ee4a | 2005-05-05 16:15:32 -0700 | [diff] [blame] | 183 | extern int os_getpgrp(void); |
Gennady Sharapov | 60d339f | 2005-09-03 15:57:47 -0700 | [diff] [blame] | 184 | extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int)); |
| 185 | extern void init_new_thread_signals(int altstack); |
| 186 | extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | extern int os_map_memory(void *virt, int fd, unsigned long long off, |
| 189 | unsigned long len, int r, int w, int x); |
| 190 | extern int os_protect_memory(void *addr, unsigned long len, |
| 191 | int r, int w, int x); |
| 192 | extern int os_unmap_memory(void *addr, int len); |
| 193 | extern void os_flush_stdout(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Gennady Sharapov | 60d339f | 2005-09-03 15:57:47 -0700 | [diff] [blame] | 195 | /* tt.c |
| 196 | * for tt mode only (will be deleted in future...) |
| 197 | */ |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 198 | extern void stop(void); |
| 199 | extern int wait_for_stop(int pid, int sig, int cont_type, void *relay); |
Jeff Dike | 0f80bc8 | 2005-09-16 19:27:50 -0700 | [diff] [blame] | 200 | extern int protect_memory(unsigned long addr, unsigned long len, |
| 201 | int r, int w, int x, int must_succeed); |
Gennady Sharapov | 60d339f | 2005-09-03 15:57:47 -0700 | [diff] [blame] | 202 | extern void forward_pending_sigio(int target); |
| 203 | extern int start_fork_tramp(void *arg, unsigned long temp_stack, |
| 204 | int clone_flags, int (*tramp)(void *)); |
| 205 | |
Gennady Sharapov | bb57842 | 2005-11-07 00:58:50 -0800 | [diff] [blame] | 206 | /* uaccess.c */ |
| 207 | extern unsigned long __do_user_copy(void *to, const void *from, int n, |
| 208 | void **fault_addr, void **fault_catcher, |
| 209 | void (*op)(void *to, const void *from, |
| 210 | int n), int *faulted_out); |
| 211 | |
Jeff Dike | ff5c6ff | 2005-11-07 00:58:51 -0800 | [diff] [blame] | 212 | /* helper.c */ |
| 213 | extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, |
| 214 | unsigned long *stack_out); |
| 215 | extern int run_helper_thread(int (*proc)(void *), void *arg, |
| 216 | unsigned int flags, unsigned long *stack_out, |
| 217 | int stack_order); |
| 218 | extern int helper_wait(int pid); |
| 219 | |
Jeff Dike | 2264c47 | 2006-01-06 00:18:59 -0800 | [diff] [blame] | 220 | /* umid.c */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Jeff Dike | 2264c47 | 2006-01-06 00:18:59 -0800 | [diff] [blame] | 222 | extern int umid_file_name(char *name, char *buf, int len); |
Jeff Dike | 7eebe8a | 2006-01-06 00:19:01 -0800 | [diff] [blame] | 223 | extern int set_umid(char *name); |
| 224 | extern char *get_umid(void); |
Jeff Dike | 2264c47 | 2006-01-06 00:18:59 -0800 | [diff] [blame] | 225 | |
Gennady Sharapov | 0805d89 | 2006-01-08 01:01:29 -0800 | [diff] [blame] | 226 | /* signal.c */ |
| 227 | extern void set_sigstack(void *sig_stack, int size); |
| 228 | extern void remove_sigstack(void); |
| 229 | extern void set_handler(int sig, void (*handler)(int), int flags, ...); |
| 230 | extern int change_sig(int signal, int on); |
| 231 | extern void block_signals(void); |
| 232 | extern void unblock_signals(void); |
| 233 | extern int get_signals(void); |
| 234 | extern int set_signals(int enable); |
Gennady Sharapov | abaf697 | 2006-01-18 17:42:46 -0800 | [diff] [blame] | 235 | extern void os_usr1_signal(int on); |
Gennady Sharapov | 0805d89 | 2006-01-08 01:01:29 -0800 | [diff] [blame] | 236 | |
Gennady Sharapov | ea2ba7d | 2006-01-08 01:01:31 -0800 | [diff] [blame] | 237 | /* trap.c */ |
| 238 | extern void os_fill_handlinfo(struct kern_handlers h); |
| 239 | extern void do_longjmp(void *p, int val); |
| 240 | |
Gennady Sharapov | 4fef0c1 | 2006-01-18 17:42:41 -0800 | [diff] [blame] | 241 | /* util.c */ |
| 242 | extern void stack_protections(unsigned long address); |
| 243 | extern void task_protections(unsigned long address); |
| 244 | extern int raw(int fd); |
| 245 | extern void setup_machinename(char *machine_out); |
| 246 | extern void setup_hostinfo(void); |
| 247 | extern int setjmp_wrapper(void (*proc)(void *, void *), ...); |
| 248 | |
Gennady Sharapov | cff65c4 | 2006-01-18 17:42:42 -0800 | [diff] [blame] | 249 | /* time.c */ |
| 250 | #define BILLION (1000 * 1000 * 1000) |
| 251 | |
| 252 | extern void switch_timers(int to_real); |
| 253 | extern void idle_sleep(int secs); |
| 254 | extern void enable_timer(void); |
| 255 | extern void disable_timer(void); |
| 256 | extern void user_time_init(void); |
| 257 | extern void uml_idle_timer(void); |
| 258 | extern unsigned long long os_nsecs(void); |
| 259 | |
Gennady Sharapov | f45d9fc | 2006-01-18 17:42:45 -0800 | [diff] [blame] | 260 | /* skas/mem.c */ |
| 261 | extern long run_syscall_stub(struct mm_id * mm_idp, |
| 262 | int syscall, unsigned long *args, long expected, |
| 263 | void **addr, int done); |
| 264 | extern long syscall_stub_data(struct mm_id * mm_idp, |
| 265 | unsigned long *data, int data_count, |
| 266 | void **addr, void **stub_addr); |
| 267 | extern int map(struct mm_id * mm_idp, unsigned long virt, |
| 268 | unsigned long len, int r, int w, int x, int phys_fd, |
| 269 | unsigned long long offset, int done, void **data); |
| 270 | extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len, |
| 271 | int done, void **data); |
| 272 | extern int protect(struct mm_id * mm_idp, unsigned long addr, |
| 273 | unsigned long len, int r, int w, int x, int done, |
| 274 | void **data); |
| 275 | |
Gennady Sharapov | abaf697 | 2006-01-18 17:42:46 -0800 | [diff] [blame] | 276 | /* skas/process.c */ |
| 277 | extern int is_skas_winch(int pid, int fd, void *data); |
| 278 | extern int start_userspace(unsigned long stub_stack); |
| 279 | extern int copy_context_skas0(unsigned long stack, int pid); |
| 280 | extern void userspace(union uml_pt_regs *regs); |
| 281 | extern void map_stub_pages(int fd, unsigned long code, |
| 282 | unsigned long data, unsigned long stack); |
| 283 | extern void new_thread(void *stack, void **switch_buf_ptr, |
| 284 | void **fork_buf_ptr, void (*handler)(int)); |
| 285 | extern void thread_wait(void *sw, void *fb); |
| 286 | extern void switch_threads(void *me, void *next); |
| 287 | extern int start_idle_thread(void *stack, void *switch_buf_ptr, |
| 288 | void **fork_buf_ptr); |
| 289 | extern void initial_thread_cb_skas(void (*proc)(void *), |
| 290 | void *arg); |
| 291 | extern void halt_skas(void); |
| 292 | extern void reboot_skas(void); |
| 293 | |
Jeff Dike | 2264c47 | 2006-01-06 00:18:59 -0800 | [diff] [blame] | 294 | #endif |