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 #include "sysdep/tls.h" 14 15 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR)) 16 17 #define OS_TYPE_FILE 1 18 #define OS_TYPE_DIR 2 19 #define OS_TYPE_SYMLINK 3 20 #define OS_TYPE_CHARDEV 4 21 #define OS_TYPE_BLOCKDEV 5 22 #define OS_TYPE_FIFO 6 23 #define OS_TYPE_SOCK 7 24 25 /* os_access() flags */ 26 #define OS_ACC_F_OK 0 /* Test for existence. */ 27 #define OS_ACC_X_OK 1 /* Test for execute permission. */ 28 #define OS_ACC_W_OK 2 /* Test for write permission. */ 29 #define OS_ACC_R_OK 4 /* Test for read permission. */ 30 #define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */ 31 32 /* 33 * types taken from stat_file() in hostfs_user.c 34 * (if they are wrong here, they are wrong there...). 35 */ 36 struct uml_stat { 37 int ust_dev; /* device */ 38 unsigned long long ust_ino; /* inode */ 39 int ust_mode; /* protection */ 40 int ust_nlink; /* number of hard links */ 41 int ust_uid; /* user ID of owner */ 42 int ust_gid; /* group ID of owner */ 43 unsigned long long ust_size; /* total size, in bytes */ 44 int ust_blksize; /* blocksize for filesystem I/O */ 45 unsigned long long ust_blocks; /* number of blocks allocated */ 46 unsigned long ust_atime; /* time of last access */ 47 unsigned long ust_mtime; /* time of last modification */ 48 unsigned long ust_ctime; /* time of last change */ 49 }; 50 51 struct openflags { 52 unsigned int r : 1; 53 unsigned int w : 1; 54 unsigned int s : 1; /* O_SYNC */ 55 unsigned int c : 1; /* O_CREAT */ 56 unsigned int t : 1; /* O_TRUNC */ 57 unsigned int a : 1; /* O_APPEND */ 58 unsigned int e : 1; /* O_EXCL */ 59 unsigned int cl : 1; /* FD_CLOEXEC */ 60 }; 61 62 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \ 63 .t = 0, .a = 0, .e = 0, .cl = 0 }) 64 65 static inline struct openflags of_read(struct openflags flags) 66 { 67 flags.r = 1; 68 return flags; 69 } 70 71 static inline struct openflags of_write(struct openflags flags) 72 { 73 flags.w = 1; 74 return flags; 75 } 76 77 static inline struct openflags of_rdwr(struct openflags flags) 78 { 79 return of_read(of_write(flags)); 80 } 81 82 static inline struct openflags of_set_rw(struct openflags flags, int r, int w) 83 { 84 flags.r = r; 85 flags.w = w; 86 return flags; 87 } 88 89 static inline struct openflags of_sync(struct openflags flags) 90 { 91 flags.s = 1; 92 return flags; 93 } 94 95 static inline struct openflags of_create(struct openflags flags) 96 { 97 flags.c = 1; 98 return flags; 99 } 100 101 static inline struct openflags of_trunc(struct openflags flags) 102 { 103 flags.t = 1; 104 return flags; 105 } 106 107 static inline struct openflags of_append(struct openflags flags) 108 { 109 flags.a = 1; 110 return flags; 111 } 112 113 static inline struct openflags of_excl(struct openflags flags) 114 { 115 flags.e = 1; 116 return flags; 117 } 118 119 static inline struct openflags of_cloexec(struct openflags flags) 120 { 121 flags.cl = 1; 122 return flags; 123 } 124 125 /* file.c */ 126 extern int os_stat_file(const char *file_name, struct uml_stat *buf); 127 extern int os_stat_fd(const int fd, struct uml_stat *buf); 128 extern int os_access(const char *file, int mode); 129 extern int os_set_exec_close(int fd); 130 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); 131 extern int os_get_ifname(int fd, char *namebuf); 132 extern int os_set_slip(int fd); 133 extern int os_mode_fd(int fd, int mode); 134 135 extern int os_seek_file(int fd, unsigned long long offset); 136 extern int os_open_file(const char *file, struct openflags flags, int mode); 137 extern int os_read_file(int fd, void *buf, int len); 138 extern int os_write_file(int fd, const void *buf, int count); 139 extern int os_file_size(const char *file, unsigned long long *size_out); 140 extern int os_file_modtime(const char *file, unsigned long *modtime); 141 extern int os_pipe(int *fd, int stream, int close_on_exec); 142 extern int os_set_fd_async(int fd); 143 extern int os_clear_fd_async(int fd); 144 extern int os_set_fd_block(int fd, int blocking); 145 extern int os_accept_connection(int fd); 146 extern int os_create_unix_socket(const char *file, int len, int close_on_exec); 147 extern int os_shutdown_socket(int fd, int r, int w); 148 extern void os_close_file(int fd); 149 extern int os_rcv_fd(int fd, int *helper_pid_out); 150 extern int create_unix_socket(char *file, int len, int close_on_exec); 151 extern int os_connect_socket(const char *name); 152 extern int os_file_type(char *file); 153 extern int os_file_mode(const char *file, struct openflags *mode_out); 154 extern int os_lock_file(int fd, int excl); 155 extern void os_flush_stdout(void); 156 extern int os_stat_filesystem(char *path, long *bsize_out, 157 long long *blocks_out, long long *bfree_out, 158 long long *bavail_out, long long *files_out, 159 long long *ffree_out, void *fsid_out, 160 int fsid_size, long *namelen_out, 161 long *spare_out); 162 extern int os_change_dir(char *dir); 163 extern int os_fchange_dir(int fd); 164 165 /* start_up.c */ 166 extern void os_early_checks(void); 167 extern void can_do_skas(void); 168 extern void os_check_bugs(void); 169 extern void check_host_supports_tls(int *supports_tls, int *tls_min); 170 171 /* mem.c */ 172 extern int create_mem_file(unsigned long long len); 173 174 /* process.c */ 175 extern unsigned long os_process_pc(int pid); 176 extern int os_process_parent(int pid); 177 extern void os_stop_process(int pid); 178 extern void os_kill_process(int pid, int reap_child); 179 extern void os_kill_ptraced_process(int pid, int reap_child); 180 extern long os_ptrace_ldt(long pid, long addr, long data); 181 182 extern int os_getpid(void); 183 extern int os_getpgrp(void); 184 185 extern void init_new_thread_signals(void); 186 extern int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr); 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 int os_drop_memory(void *addr, int length); 194 extern int can_drop_memory(void); 195 extern void os_flush_stdout(void); 196 197 /* uaccess.c */ 198 extern unsigned long __do_user_copy(void *to, const void *from, int n, 199 void **fault_addr, jmp_buf **fault_catcher, 200 void (*op)(void *to, const void *from, 201 int n), int *faulted_out); 202 203 /* execvp.c */ 204 extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); 205 /* helper.c */ 206 extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv); 207 extern int run_helper_thread(int (*proc)(void *), void *arg, 208 unsigned int flags, unsigned long *stack_out); 209 extern int helper_wait(int pid); 210 211 212 /* tls.c */ 213 extern int os_set_thread_area(user_desc_t *info, int pid); 214 extern int os_get_thread_area(user_desc_t *info, int pid); 215 216 /* umid.c */ 217 extern int umid_file_name(char *name, char *buf, int len); 218 extern int set_umid(char *name); 219 extern char *get_umid(void); 220 221 /* signal.c */ 222 extern void timer_init(void); 223 extern void set_sigstack(void *sig_stack, int size); 224 extern void remove_sigstack(void); 225 extern void set_handler(int sig, void (*handler)(int), int flags, ...); 226 extern int change_sig(int signal, int on); 227 extern void block_signals(void); 228 extern void unblock_signals(void); 229 extern int get_signals(void); 230 extern int set_signals(int enable); 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)); 238 239 /* time.c */ 240 extern void idle_sleep(unsigned long long nsecs); 241 extern int set_interval(void); 242 extern int timer_one_shot(int ticks); 243 extern long long disable_timer(void); 244 extern void uml_idle_timer(void); 245 extern long long os_nsecs(void); 246 247 /* skas/mem.c */ 248 extern long run_syscall_stub(struct mm_id * mm_idp, 249 int syscall, unsigned long *args, long expected, 250 void **addr, int done); 251 extern long syscall_stub_data(struct mm_id * mm_idp, 252 unsigned long *data, int data_count, 253 void **addr, void **stub_addr); 254 extern int map(struct mm_id * mm_idp, unsigned long virt, 255 unsigned long len, int prot, int phys_fd, 256 unsigned long long offset, int done, void **data); 257 extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, 258 int done, void **data); 259 extern int protect(struct mm_id * mm_idp, unsigned long addr, 260 unsigned long len, unsigned int prot, int done, void **data); 261 262 /* skas/process.c */ 263 extern int is_skas_winch(int pid, int fd, void *data); 264 extern int start_userspace(unsigned long stub_stack); 265 extern int copy_context_skas0(unsigned long stack, int pid); 266 extern void userspace(struct uml_pt_regs *regs); 267 extern int map_stub_pages(int fd, unsigned long code, unsigned long data, 268 unsigned long stack); 269 extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); 270 extern void switch_threads(jmp_buf *me, jmp_buf *you); 271 extern int start_idle_thread(void *stack, jmp_buf *switch_buf); 272 extern void initial_thread_cb_skas(void (*proc)(void *), 273 void *arg); 274 extern void halt_skas(void); 275 extern void reboot_skas(void); 276 277 /* irq.c */ 278 extern int os_waiting_for_events(struct irq_fd *active_fds); 279 extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds); 280 extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, 281 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2); 282 extern void os_free_irq_later(struct irq_fd *active_fds, 283 int irq, void *dev_id); 284 extern int os_get_pollfd(int i); 285 extern void os_set_pollfd(int i, int fd); 286 extern void os_set_ioignore(void); 287 288 /* sigio.c */ 289 extern int add_sigio_fd(int fd); 290 extern int ignore_sigio_fd(int fd); 291 extern void maybe_sigio_broken(int fd, int read); 292 extern void sigio_broken(int fd, int read); 293 294 /* sys-x86_64/prctl.c */ 295 extern int os_arch_prctl(int pid, int code, unsigned long *addr); 296 297 /* tty.c */ 298 extern int get_pty(void); 299 300 /* sys-$ARCH/task_size.c */ 301 extern unsigned long os_get_top_address(void); 302 303 #endif 304