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 9#include "uml-config.h" 10#include "asm/types.h" 11#include "../os/include/file.h" 12#include "sysdep/ptrace.h" 13#include "kern_util.h" 14#include "skas/mm_id.h" 15#include "irq_user.h" 16#include "sysdep/tls.h" 17#include "sysdep/archsetjmp.h" 18 19#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR)) 20 21#define OS_TYPE_FILE 1 22#define OS_TYPE_DIR 2 23#define OS_TYPE_SYMLINK 3 24#define OS_TYPE_CHARDEV 4 25#define OS_TYPE_BLOCKDEV 5 26#define OS_TYPE_FIFO 6 27#define OS_TYPE_SOCK 7 28 29/* os_access() flags */ 30#define OS_ACC_F_OK 0 /* Test for existence. */ 31#define OS_ACC_X_OK 1 /* Test for execute permission. */ 32#define OS_ACC_W_OK 2 /* Test for write permission. */ 33#define OS_ACC_R_OK 4 /* Test for read permission. */ 34#define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */ 35 36/* 37 * types taken from stat_file() in hostfs_user.c 38 * (if they are wrong here, they are wrong there...). 39 */ 40struct uml_stat { 41 int ust_dev; /* device */ 42 unsigned long long ust_ino; /* inode */ 43 int ust_mode; /* protection */ 44 int ust_nlink; /* number of hard links */ 45 int ust_uid; /* user ID of owner */ 46 int ust_gid; /* group ID of owner */ 47 unsigned long long ust_size; /* total size, in bytes */ 48 int ust_blksize; /* blocksize for filesystem I/O */ 49 unsigned long long ust_blocks; /* number of blocks allocated */ 50 unsigned long ust_atime; /* time of last access */ 51 unsigned long ust_mtime; /* time of last modification */ 52 unsigned long ust_ctime; /* time of last change */ 53}; 54 55struct openflags { 56 unsigned int r : 1; 57 unsigned int w : 1; 58 unsigned int s : 1; /* O_SYNC */ 59 unsigned int c : 1; /* O_CREAT */ 60 unsigned int t : 1; /* O_TRUNC */ 61 unsigned int a : 1; /* O_APPEND */ 62 unsigned int e : 1; /* O_EXCL */ 63 unsigned int cl : 1; /* FD_CLOEXEC */ 64}; 65 66#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \ 67 .t = 0, .a = 0, .e = 0, .cl = 0 }) 68 69static inline struct openflags of_read(struct openflags flags) 70{ 71 flags.r = 1; 72 return flags; 73} 74 75static inline struct openflags of_write(struct openflags flags) 76{ 77 flags.w = 1; 78 return flags; 79} 80 81static inline struct openflags of_rdwr(struct openflags flags) 82{ 83 return of_read(of_write(flags)); 84} 85 86static inline struct openflags of_set_rw(struct openflags flags, int r, int w) 87{ 88 flags.r = r; 89 flags.w = w; 90 return flags; 91} 92 93static inline struct openflags of_sync(struct openflags flags) 94{ 95 flags.s = 1; 96 return flags; 97} 98 99static inline struct openflags of_create(struct openflags flags) 100{ 101 flags.c = 1; 102 return flags; 103} 104 105static inline struct openflags of_trunc(struct openflags flags) 106{ 107 flags.t = 1; 108 return flags; 109} 110 111static inline struct openflags of_append(struct openflags flags) 112{ 113 flags.a = 1; 114 return flags; 115} 116 117static inline struct openflags of_excl(struct openflags flags) 118{ 119 flags.e = 1; 120 return flags; 121} 122 123static inline struct openflags of_cloexec(struct openflags flags) 124{ 125 flags.cl = 1; 126 return flags; 127} 128 129/* file.c */ 130extern int os_stat_file(const char *file_name, struct uml_stat *buf); 131extern int os_stat_fd(const int fd, struct uml_stat *buf); 132extern int os_access(const char *file, int mode); 133extern void os_print_error(int error, const char* str); 134extern int os_get_exec_close(int fd, int *close_on_exec); 135extern int os_set_exec_close(int fd, int close_on_exec); 136extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); 137extern int os_window_size(int fd, int *rows, int *cols); 138extern int os_new_tty_pgrp(int fd, int pid); 139extern int os_get_ifname(int fd, char *namebuf); 140extern int os_set_slip(int fd); 141extern int os_set_owner(int fd, int pid); 142extern int os_mode_fd(int fd, int mode); 143 144extern int os_seek_file(int fd, __u64 offset); 145extern int os_open_file(char *file, struct openflags flags, int mode); 146extern int os_read_file(int fd, void *buf, int len); 147extern int os_write_file(int fd, const void *buf, int count); 148extern int os_file_size(char *file, unsigned long long *size_out); 149extern int os_file_modtime(char *file, unsigned long *modtime); 150extern int os_pipe(int *fd, int stream, int close_on_exec); 151extern int os_set_fd_async(int fd, int owner); 152extern int os_clear_fd_async(int fd); 153extern int os_set_fd_block(int fd, int blocking); 154extern int os_accept_connection(int fd); 155extern int os_create_unix_socket(char *file, int len, int close_on_exec); 156extern int os_shutdown_socket(int fd, int r, int w); 157extern void os_close_file(int fd); 158extern int os_rcv_fd(int fd, int *helper_pid_out); 159extern int create_unix_socket(char *file, int len, int close_on_exec); 160extern int os_connect_socket(char *name); 161extern int os_file_type(char *file); 162extern int os_file_mode(char *file, struct openflags *mode_out); 163extern int os_lock_file(int fd, int excl); 164extern void os_flush_stdout(void); 165extern 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); 171extern int os_change_dir(char *dir); 172extern int os_fchange_dir(int fd); 173 174/* start_up.c */ 175extern void os_early_checks(void); 176extern int can_do_skas(void); 177extern void os_check_bugs(void); 178extern void check_host_supports_tls(int *supports_tls, int *tls_min); 179 180/* Make sure they are clear when running in TT mode. Required by 181 * SEGV_MAYBE_FIXABLE */ 182#ifdef UML_CONFIG_MODE_SKAS 183#define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0) 184#else 185#define clear_can_do_skas() do {} while (0) 186#endif 187 188/* mem.c */ 189extern int create_mem_file(unsigned long long len); 190 191/* process.c */ 192extern unsigned long os_process_pc(int pid); 193extern int os_process_parent(int pid); 194extern void os_stop_process(int pid); 195extern void os_kill_process(int pid, int reap_child); 196extern void os_kill_ptraced_process(int pid, int reap_child); 197#ifdef UML_CONFIG_MODE_TT 198extern void os_usr1_process(int pid); 199#endif 200extern long os_ptrace_ldt(long pid, long addr, long data); 201 202extern int os_getpid(void); 203extern int os_getpgrp(void); 204 205#ifdef UML_CONFIG_MODE_TT 206extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int)); 207extern void stop(void); 208#endif 209extern void init_new_thread_signals(void); 210extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr); 211 212extern int os_map_memory(void *virt, int fd, unsigned long long off, 213 unsigned long len, int r, int w, int x); 214extern int os_protect_memory(void *addr, unsigned long len, 215 int r, int w, int x); 216extern int os_unmap_memory(void *addr, int len); 217extern int os_drop_memory(void *addr, int length); 218extern int can_drop_memory(void); 219extern void os_flush_stdout(void); 220 221/* tt.c 222 * for tt mode only (will be deleted in future...) 223 */ 224extern void forward_ipi(int fd, int pid); 225extern void kill_child_dead(int pid); 226extern int wait_for_stop(int pid, int sig, int cont_type, void *relay); 227extern int protect_memory(unsigned long addr, unsigned long len, 228 int r, int w, int x, int must_succeed); 229extern void forward_pending_sigio(int target); 230extern int start_fork_tramp(void *arg, unsigned long temp_stack, 231 int clone_flags, int (*tramp)(void *)); 232 233/* uaccess.c */ 234extern unsigned long __do_user_copy(void *to, const void *from, int n, 235 void **fault_addr, void **fault_catcher, 236 void (*op)(void *to, const void *from, 237 int n), int *faulted_out); 238 239/* execvp.c */ 240extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); 241/* helper.c */ 242extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv, 243 unsigned long *stack_out); 244extern int run_helper_thread(int (*proc)(void *), void *arg, 245 unsigned int flags, unsigned long *stack_out, 246 int stack_order); 247extern int helper_wait(int pid); 248 249 250/* tls.c */ 251extern int os_set_thread_area(user_desc_t *info, int pid); 252extern int os_get_thread_area(user_desc_t *info, int pid); 253 254/* umid.c */ 255extern int umid_file_name(char *name, char *buf, int len); 256extern int set_umid(char *name); 257extern char *get_umid(void); 258 259/* signal.c */ 260extern void set_sigstack(void *sig_stack, int size); 261extern void remove_sigstack(void); 262extern void set_handler(int sig, void (*handler)(int), int flags, ...); 263extern int change_sig(int signal, int on); 264extern void block_signals(void); 265extern void unblock_signals(void); 266extern int get_signals(void); 267extern int set_signals(int enable); 268 269/* trap.c */ 270extern void os_fill_handlinfo(struct kern_handlers h); 271extern void do_longjmp(void *p, int val); 272 273/* util.c */ 274extern void stack_protections(unsigned long address); 275extern int raw(int fd); 276extern void setup_machinename(char *machine_out); 277extern void setup_hostinfo(char *buf, int len); 278extern int setjmp_wrapper(void (*proc)(void *, void *), ...); 279extern void os_dump_core(void); 280 281/* time.c */ 282#define BILLION (1000 * 1000 * 1000) 283 284extern void switch_timers(int to_real); 285extern void idle_sleep(int secs); 286extern int set_interval(int is_virtual); 287#ifdef CONFIG_MODE_TT 288extern void enable_timer(void); 289#endif 290extern void disable_timer(void); 291extern void uml_idle_timer(void); 292extern unsigned long long os_nsecs(void); 293 294/* skas/mem.c */ 295extern long run_syscall_stub(struct mm_id * mm_idp, 296 int syscall, unsigned long *args, long expected, 297 void **addr, int done); 298extern long syscall_stub_data(struct mm_id * mm_idp, 299 unsigned long *data, int data_count, 300 void **addr, void **stub_addr); 301extern int map(struct mm_id * mm_idp, unsigned long virt, 302 unsigned long len, int prot, int phys_fd, 303 unsigned long long offset, int done, void **data); 304extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, 305 int done, void **data); 306extern int protect(struct mm_id * mm_idp, unsigned long addr, 307 unsigned long len, unsigned int prot, int done, void **data); 308 309/* skas/process.c */ 310extern int is_skas_winch(int pid, int fd, void *data); 311extern int start_userspace(unsigned long stub_stack); 312extern int copy_context_skas0(unsigned long stack, int pid); 313extern void userspace(union uml_pt_regs *regs); 314extern void map_stub_pages(int fd, unsigned long code, 315 unsigned long data, unsigned long stack); 316extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); 317extern void switch_threads(jmp_buf *me, jmp_buf *you); 318extern int start_idle_thread(void *stack, jmp_buf *switch_buf); 319extern void initial_thread_cb_skas(void (*proc)(void *), 320 void *arg); 321extern void halt_skas(void); 322extern void reboot_skas(void); 323 324/* irq.c */ 325extern int os_waiting_for_events(struct irq_fd *active_fds); 326extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds); 327extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, 328 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2); 329extern void os_free_irq_later(struct irq_fd *active_fds, 330 int irq, void *dev_id); 331extern int os_get_pollfd(int i); 332extern void os_set_pollfd(int i, int fd); 333extern void os_set_ioignore(void); 334extern void init_irq_signals(int on_sigstack); 335 336/* sigio.c */ 337extern int add_sigio_fd(int fd); 338extern int ignore_sigio_fd(int fd); 339extern void maybe_sigio_broken(int fd, int read); 340 341/* skas/trap */ 342extern void sig_handler_common_skas(int sig, void *sc_ptr); 343 344/* sys-x86_64/prctl.c */ 345extern int os_arch_prctl(int pid, int code, unsigned long *addr); 346 347/* tty.c */ 348int get_pty(void); 349 350#endif 351