1 /* 2 * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk}) 3 * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de) 4 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 5 * Licensed under the GPL 6 */ 7 8 #ifndef __OS_H__ 9 #define __OS_H__ 10 11 #include <stdarg.h> 12 #include <irq_user.h> 13 #include <longjmp.h> 14 #include <mm_id.h> 15 16 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR)) 17 18 #define OS_TYPE_FILE 1 19 #define OS_TYPE_DIR 2 20 #define OS_TYPE_SYMLINK 3 21 #define OS_TYPE_CHARDEV 4 22 #define OS_TYPE_BLOCKDEV 5 23 #define OS_TYPE_FIFO 6 24 #define OS_TYPE_SOCK 7 25 26 /* os_access() flags */ 27 #define OS_ACC_F_OK 0 /* Test for existence. */ 28 #define OS_ACC_X_OK 1 /* Test for execute permission. */ 29 #define OS_ACC_W_OK 2 /* Test for write permission. */ 30 #define OS_ACC_R_OK 4 /* Test for read permission. */ 31 #define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */ 32 33 #ifdef CONFIG_64BIT 34 #define OS_LIB_PATH "/usr/lib64/" 35 #else 36 #define OS_LIB_PATH "/usr/lib/" 37 #endif 38 39 /* 40 * types taken from stat_file() in hostfs_user.c 41 * (if they are wrong here, they are wrong there...). 42 */ 43 struct uml_stat { 44 int ust_dev; /* device */ 45 unsigned long long ust_ino; /* inode */ 46 int ust_mode; /* protection */ 47 int ust_nlink; /* number of hard links */ 48 int ust_uid; /* user ID of owner */ 49 int ust_gid; /* group ID of owner */ 50 unsigned long long ust_size; /* total size, in bytes */ 51 int ust_blksize; /* blocksize for filesystem I/O */ 52 unsigned long long ust_blocks; /* number of blocks allocated */ 53 unsigned long ust_atime; /* time of last access */ 54 unsigned long ust_mtime; /* time of last modification */ 55 unsigned long ust_ctime; /* time of last change */ 56 }; 57 58 struct openflags { 59 unsigned int r : 1; 60 unsigned int w : 1; 61 unsigned int s : 1; /* O_SYNC */ 62 unsigned int c : 1; /* O_CREAT */ 63 unsigned int t : 1; /* O_TRUNC */ 64 unsigned int a : 1; /* O_APPEND */ 65 unsigned int e : 1; /* O_EXCL */ 66 unsigned int cl : 1; /* FD_CLOEXEC */ 67 }; 68 69 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \ 70 .t = 0, .a = 0, .e = 0, .cl = 0 }) 71 72 static inline struct openflags of_read(struct openflags flags) 73 { 74 flags.r = 1; 75 return flags; 76 } 77 78 static inline struct openflags of_write(struct openflags flags) 79 { 80 flags.w = 1; 81 return flags; 82 } 83 84 static inline struct openflags of_rdwr(struct openflags flags) 85 { 86 return of_read(of_write(flags)); 87 } 88 89 static inline struct openflags of_set_rw(struct openflags flags, int r, int w) 90 { 91 flags.r = r; 92 flags.w = w; 93 return flags; 94 } 95 96 static inline struct openflags of_sync(struct openflags flags) 97 { 98 flags.s = 1; 99 return flags; 100 } 101 102 static inline struct openflags of_create(struct openflags flags) 103 { 104 flags.c = 1; 105 return flags; 106 } 107 108 static inline struct openflags of_trunc(struct openflags flags) 109 { 110 flags.t = 1; 111 return flags; 112 } 113 114 static inline struct openflags of_append(struct openflags flags) 115 { 116 flags.a = 1; 117 return flags; 118 } 119 120 static inline struct openflags of_excl(struct openflags flags) 121 { 122 flags.e = 1; 123 return flags; 124 } 125 126 static inline struct openflags of_cloexec(struct openflags flags) 127 { 128 flags.cl = 1; 129 return flags; 130 } 131 132 /* file.c */ 133 extern int os_stat_file(const char *file_name, struct uml_stat *buf); 134 extern int os_stat_fd(const int fd, struct uml_stat *buf); 135 extern int os_access(const char *file, int mode); 136 extern int os_set_exec_close(int fd); 137 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); 138 extern int os_get_ifname(int fd, char *namebuf); 139 extern int os_set_slip(int fd); 140 extern int os_mode_fd(int fd, int mode); 141 extern int os_fsync_file(int fd); 142 143 extern int os_seek_file(int fd, unsigned long long offset); 144 extern int os_open_file(const char *file, struct openflags flags, int mode); 145 extern int os_read_file(int fd, void *buf, int len); 146 extern int os_write_file(int fd, const void *buf, int count); 147 extern int os_sync_file(int fd); 148 extern int os_file_size(const char *file, unsigned long long *size_out); 149 extern int os_file_modtime(const char *file, unsigned long *modtime); 150 extern int os_pipe(int *fd, int stream, int close_on_exec); 151 extern int os_set_fd_async(int fd); 152 extern int os_clear_fd_async(int fd); 153 extern int os_set_fd_block(int fd, int blocking); 154 extern int os_accept_connection(int fd); 155 extern int os_create_unix_socket(const char *file, int len, int close_on_exec); 156 extern int os_shutdown_socket(int fd, int r, int w); 157 extern void os_close_file(int fd); 158 extern int os_rcv_fd(int fd, int *helper_pid_out); 159 extern int create_unix_socket(char *file, int len, int close_on_exec); 160 extern int os_connect_socket(const char *name); 161 extern int os_file_type(char *file); 162 extern int os_file_mode(const char *file, struct openflags *mode_out); 163 extern int os_lock_file(int fd, int excl); 164 extern void os_flush_stdout(void); 165 extern int os_stat_filesystem(char *path, long *bsize_out, 166 long long *blocks_out, long long *bfree_out, 167 long long *bavail_out, long long *files_out, 168 long long *ffree_out, void *fsid_out, 169 int fsid_size, long *namelen_out, 170 long *spare_out); 171 extern int os_change_dir(char *dir); 172 extern int os_fchange_dir(int fd); 173 extern unsigned os_major(unsigned long long dev); 174 extern unsigned os_minor(unsigned long long dev); 175 extern unsigned long long os_makedev(unsigned major, unsigned minor); 176 177 /* start_up.c */ 178 extern void os_early_checks(void); 179 extern void os_check_bugs(void); 180 extern void check_host_supports_tls(int *supports_tls, int *tls_min); 181 182 /* mem.c */ 183 extern int create_mem_file(unsigned long long len); 184 185 /* process.c */ 186 extern unsigned long os_process_pc(int pid); 187 extern int os_process_parent(int pid); 188 extern void os_alarm_process(int pid); 189 extern void os_stop_process(int pid); 190 extern void os_kill_process(int pid, int reap_child); 191 extern void os_kill_ptraced_process(int pid, int reap_child); 192 193 extern int os_getpid(void); 194 extern int os_getpgrp(void); 195 196 extern void init_new_thread_signals(void); 197 198 extern int os_map_memory(void *virt, int fd, unsigned long long off, 199 unsigned long len, int r, int w, int x); 200 extern int os_protect_memory(void *addr, unsigned long len, 201 int r, int w, int x); 202 extern int os_unmap_memory(void *addr, int len); 203 extern int os_drop_memory(void *addr, int length); 204 extern int can_drop_memory(void); 205 extern void os_flush_stdout(void); 206 extern int os_mincore(void *addr, unsigned long len); 207 208 /* 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 extern int run_helper_thread(int (*proc)(void *), void *arg, 213 unsigned int flags, unsigned long *stack_out); 214 extern int helper_wait(int pid); 215 216 217 /* umid.c */ 218 extern int umid_file_name(char *name, char *buf, int len); 219 extern int set_umid(char *name); 220 extern char *get_umid(void); 221 222 /* signal.c */ 223 extern void timer_set_signal_handler(void); 224 extern void set_sigstack(void *sig_stack, int size); 225 extern void remove_sigstack(void); 226 extern void set_handler(int sig); 227 extern int change_sig(int signal, int on); 228 extern void block_signals(void); 229 extern void unblock_signals(void); 230 extern int get_signals(void); 231 extern int set_signals(int enable); 232 extern int os_is_signal_stack(void); 233 extern void deliver_alarm(void); 234 235 /* util.c */ 236 extern void stack_protections(unsigned long address); 237 extern int raw(int fd); 238 extern void setup_machinename(char *machine_out); 239 extern void setup_hostinfo(char *buf, int len); 240 extern void os_dump_core(void) __attribute__ ((noreturn)); 241 extern void um_early_printk(const char *s, unsigned int n); 242 extern void os_fix_helper_signals(void); 243 244 /* time.c */ 245 extern void os_idle_sleep(unsigned long long nsecs); 246 extern int os_timer_create(void* timer); 247 extern int os_timer_set_interval(void* timer, void* its); 248 extern int os_timer_one_shot(int ticks); 249 extern long long os_timer_disable(void); 250 extern long os_timer_remain(void* timer); 251 extern void uml_idle_timer(void); 252 extern long long os_persistent_clock_emulation(void); 253 extern long long os_nsecs(void); 254 extern long long os_vnsecs(void); 255 256 /* skas/mem.c */ 257 extern long run_syscall_stub(struct mm_id * mm_idp, 258 int syscall, unsigned long *args, long expected, 259 void **addr, int done); 260 extern long syscall_stub_data(struct mm_id * mm_idp, 261 unsigned long *data, int data_count, 262 void **addr, void **stub_addr); 263 extern int map(struct mm_id * mm_idp, unsigned long virt, 264 unsigned long len, int prot, int phys_fd, 265 unsigned long long offset, int done, void **data); 266 extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, 267 int done, void **data); 268 extern int protect(struct mm_id * mm_idp, unsigned long addr, 269 unsigned long len, unsigned int prot, int done, void **data); 270 271 /* skas/process.c */ 272 extern int is_skas_winch(int pid, int fd, void *data); 273 extern int start_userspace(unsigned long stub_stack); 274 extern int copy_context_skas0(unsigned long stack, int pid); 275 extern void userspace(struct uml_pt_regs *regs); 276 extern int map_stub_pages(int fd, unsigned long code, unsigned long data, 277 unsigned long stack); 278 extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); 279 extern void switch_threads(jmp_buf *me, jmp_buf *you); 280 extern int start_idle_thread(void *stack, jmp_buf *switch_buf); 281 extern void initial_thread_cb_skas(void (*proc)(void *), 282 void *arg); 283 extern void halt_skas(void); 284 extern void reboot_skas(void); 285 extern int get_syscall(struct uml_pt_regs *regs); 286 287 /* irq.c */ 288 extern int os_waiting_for_events(struct irq_fd *active_fds); 289 extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds); 290 extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, 291 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2); 292 extern void os_free_irq_later(struct irq_fd *active_fds, 293 int irq, void *dev_id); 294 extern int os_get_pollfd(int i); 295 extern void os_set_pollfd(int i, int fd); 296 extern void os_set_ioignore(void); 297 298 /* sigio.c */ 299 extern int add_sigio_fd(int fd); 300 extern int ignore_sigio_fd(int fd); 301 extern void maybe_sigio_broken(int fd, int read); 302 extern void sigio_broken(int fd, int read); 303 304 /* sys-x86_64/prctl.c */ 305 extern int os_arch_prctl(int pid, int code, unsigned long *addr); 306 307 /* tty.c */ 308 extern int get_pty(void); 309 310 /* sys-$ARCH/task_size.c */ 311 extern unsigned long os_get_top_address(void); 312 313 long syscall(long number, ...); 314 315 #endif 316