1 /* 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 3 * Licensed under the GPL 4 */ 5 6 #ifndef __OS_H__ 7 #define __OS_H__ 8 9 #include <stdarg.h> 10 #include <irq_user.h> 11 #include <longjmp.h> 12 #include <mm_id.h> 13 14 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR)) 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 #ifdef CONFIG_64BIT 32 #define OS_LIB_PATH "/usr/lib64/" 33 #else 34 #define OS_LIB_PATH "/usr/lib/" 35 #endif 36 37 /* 38 * types taken from stat_file() in hostfs_user.c 39 * (if they are wrong here, they are wrong there...). 40 */ 41 struct uml_stat { 42 int ust_dev; /* device */ 43 unsigned long long ust_ino; /* inode */ 44 int ust_mode; /* protection */ 45 int ust_nlink; /* number of hard links */ 46 int ust_uid; /* user ID of owner */ 47 int ust_gid; /* group ID of owner */ 48 unsigned long long ust_size; /* total size, in bytes */ 49 int ust_blksize; /* blocksize for filesystem I/O */ 50 unsigned long long ust_blocks; /* number of blocks allocated */ 51 unsigned long ust_atime; /* time of last access */ 52 unsigned long ust_mtime; /* time of last modification */ 53 unsigned long ust_ctime; /* time of last change */ 54 }; 55 56 struct openflags { 57 unsigned int r : 1; 58 unsigned int w : 1; 59 unsigned int s : 1; /* O_SYNC */ 60 unsigned int c : 1; /* O_CREAT */ 61 unsigned int t : 1; /* O_TRUNC */ 62 unsigned int a : 1; /* O_APPEND */ 63 unsigned int e : 1; /* O_EXCL */ 64 unsigned int cl : 1; /* FD_CLOEXEC */ 65 }; 66 67 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \ 68 .t = 0, .a = 0, .e = 0, .cl = 0 }) 69 70 static inline struct openflags of_read(struct openflags flags) 71 { 72 flags.r = 1; 73 return flags; 74 } 75 76 static inline struct openflags of_write(struct openflags flags) 77 { 78 flags.w = 1; 79 return flags; 80 } 81 82 static inline struct openflags of_rdwr(struct openflags flags) 83 { 84 return of_read(of_write(flags)); 85 } 86 87 static inline struct openflags of_set_rw(struct openflags flags, int r, int w) 88 { 89 flags.r = r; 90 flags.w = w; 91 return flags; 92 } 93 94 static inline struct openflags of_sync(struct openflags flags) 95 { 96 flags.s = 1; 97 return flags; 98 } 99 100 static inline struct openflags of_create(struct openflags flags) 101 { 102 flags.c = 1; 103 return flags; 104 } 105 106 static inline struct openflags of_trunc(struct openflags flags) 107 { 108 flags.t = 1; 109 return flags; 110 } 111 112 static inline struct openflags of_append(struct openflags flags) 113 { 114 flags.a = 1; 115 return flags; 116 } 117 118 static inline struct openflags of_excl(struct openflags flags) 119 { 120 flags.e = 1; 121 return flags; 122 } 123 124 static inline struct openflags of_cloexec(struct openflags flags) 125 { 126 flags.cl = 1; 127 return flags; 128 } 129 130 /* file.c */ 131 extern int os_stat_file(const char *file_name, struct uml_stat *buf); 132 extern int os_stat_fd(const int fd, struct uml_stat *buf); 133 extern int os_access(const char *file, int mode); 134 extern int os_set_exec_close(int fd); 135 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); 136 extern int os_get_ifname(int fd, char *namebuf); 137 extern int os_set_slip(int fd); 138 extern int os_mode_fd(int fd, int mode); 139 140 extern int os_seek_file(int fd, unsigned long long offset); 141 extern int os_open_file(const char *file, struct openflags flags, int mode); 142 extern int os_read_file(int fd, void *buf, int len); 143 extern int os_write_file(int fd, const void *buf, int count); 144 extern int os_sync_file(int fd); 145 extern int os_file_size(const char *file, unsigned long long *size_out); 146 extern int os_file_modtime(const char *file, unsigned long *modtime); 147 extern int os_pipe(int *fd, int stream, int close_on_exec); 148 extern int os_set_fd_async(int fd); 149 extern int os_clear_fd_async(int fd); 150 extern int os_set_fd_block(int fd, int blocking); 151 extern int os_accept_connection(int fd); 152 extern int os_create_unix_socket(const char *file, int len, int close_on_exec); 153 extern int os_shutdown_socket(int fd, int r, int w); 154 extern void os_close_file(int fd); 155 extern int os_rcv_fd(int fd, int *helper_pid_out); 156 extern int create_unix_socket(char *file, int len, int close_on_exec); 157 extern int os_connect_socket(const char *name); 158 extern int os_file_type(char *file); 159 extern int os_file_mode(const char *file, struct openflags *mode_out); 160 extern int os_lock_file(int fd, int excl); 161 extern void os_flush_stdout(void); 162 extern int os_stat_filesystem(char *path, long *bsize_out, 163 long long *blocks_out, long long *bfree_out, 164 long long *bavail_out, long long *files_out, 165 long long *ffree_out, void *fsid_out, 166 int fsid_size, long *namelen_out, 167 long *spare_out); 168 extern int os_change_dir(char *dir); 169 extern int os_fchange_dir(int fd); 170 extern unsigned os_major(unsigned long long dev); 171 extern unsigned os_minor(unsigned long long dev); 172 extern unsigned long long os_makedev(unsigned major, unsigned minor); 173 174 /* start_up.c */ 175 extern void os_early_checks(void); 176 extern void can_do_skas(void); 177 extern void os_check_bugs(void); 178 extern void check_host_supports_tls(int *supports_tls, int *tls_min); 179 180 /* mem.c */ 181 extern int create_mem_file(unsigned long long len); 182 183 /* process.c */ 184 extern unsigned long os_process_pc(int pid); 185 extern int os_process_parent(int pid); 186 extern void os_stop_process(int pid); 187 extern void os_kill_process(int pid, int reap_child); 188 extern void os_kill_ptraced_process(int pid, int reap_child); 189 extern long os_ptrace_ldt(long pid, long addr, long data); 190 191 extern int os_getpid(void); 192 extern int os_getpgrp(void); 193 194 extern void init_new_thread_signals(void); 195 196 extern int os_map_memory(void *virt, int fd, unsigned long long off, 197 unsigned long len, int r, int w, int x); 198 extern int os_protect_memory(void *addr, unsigned long len, 199 int r, int w, int x); 200 extern int os_unmap_memory(void *addr, int len); 201 extern int os_drop_memory(void *addr, int length); 202 extern int can_drop_memory(void); 203 extern void os_flush_stdout(void); 204 extern int os_mincore(void *addr, unsigned long len); 205 206 /* execvp.c */ 207 extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); 208 /* helper.c */ 209 extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv); 210 extern int run_helper_thread(int (*proc)(void *), void *arg, 211 unsigned int flags, unsigned long *stack_out); 212 extern int helper_wait(int pid); 213 214 215 /* umid.c */ 216 extern int umid_file_name(char *name, char *buf, int len); 217 extern int set_umid(char *name); 218 extern char *get_umid(void); 219 220 /* signal.c */ 221 extern void timer_init(void); 222 extern void set_sigstack(void *sig_stack, int size); 223 extern void remove_sigstack(void); 224 extern void set_handler(int sig); 225 extern int change_sig(int signal, int on); 226 extern void block_signals(void); 227 extern void unblock_signals(void); 228 extern int get_signals(void); 229 extern int set_signals(int enable); 230 extern int os_is_signal_stack(void); 231 232 /* util.c */ 233 extern void stack_protections(unsigned long address); 234 extern int raw(int fd); 235 extern void setup_machinename(char *machine_out); 236 extern void setup_hostinfo(char *buf, int len); 237 extern void os_dump_core(void) __attribute__ ((noreturn)); 238 extern void um_early_printk(const char *s, unsigned int n); 239 extern void os_fix_helper_signals(void); 240 241 /* time.c */ 242 extern void idle_sleep(unsigned long long nsecs); 243 extern int set_interval(void); 244 extern int timer_one_shot(int ticks); 245 extern long long disable_timer(void); 246 extern void uml_idle_timer(void); 247 extern long long os_nsecs(void); 248 249 /* skas/mem.c */ 250 extern long run_syscall_stub(struct mm_id * mm_idp, 251 int syscall, unsigned long *args, long expected, 252 void **addr, int done); 253 extern long syscall_stub_data(struct mm_id * mm_idp, 254 unsigned long *data, int data_count, 255 void **addr, void **stub_addr); 256 extern int map(struct mm_id * mm_idp, unsigned long virt, 257 unsigned long len, int prot, int phys_fd, 258 unsigned long long offset, int done, void **data); 259 extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, 260 int done, void **data); 261 extern int protect(struct mm_id * mm_idp, unsigned long addr, 262 unsigned long len, unsigned int prot, int done, void **data); 263 264 /* skas/process.c */ 265 extern int is_skas_winch(int pid, int fd, void *data); 266 extern int start_userspace(unsigned long stub_stack); 267 extern int copy_context_skas0(unsigned long stack, int pid); 268 extern void userspace(struct uml_pt_regs *regs); 269 extern int map_stub_pages(int fd, unsigned long code, unsigned long data, 270 unsigned long stack); 271 extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); 272 extern void switch_threads(jmp_buf *me, jmp_buf *you); 273 extern int start_idle_thread(void *stack, jmp_buf *switch_buf); 274 extern void initial_thread_cb_skas(void (*proc)(void *), 275 void *arg); 276 extern void halt_skas(void); 277 extern void reboot_skas(void); 278 279 /* irq.c */ 280 extern int os_waiting_for_events(struct irq_fd *active_fds); 281 extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds); 282 extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, 283 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2); 284 extern void os_free_irq_later(struct irq_fd *active_fds, 285 int irq, void *dev_id); 286 extern int os_get_pollfd(int i); 287 extern void os_set_pollfd(int i, int fd); 288 extern void os_set_ioignore(void); 289 290 /* sigio.c */ 291 extern int add_sigio_fd(int fd); 292 extern int ignore_sigio_fd(int fd); 293 extern void maybe_sigio_broken(int fd, int read); 294 extern void sigio_broken(int fd, int read); 295 296 /* sys-x86_64/prctl.c */ 297 extern int os_arch_prctl(int pid, int code, unsigned long *addr); 298 299 /* tty.c */ 300 extern int get_pty(void); 301 302 /* sys-$ARCH/task_size.c */ 303 extern unsigned long os_get_top_address(void); 304 305 #endif 306