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 */ 41struct 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 56struct 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 70static inline struct openflags of_read(struct openflags flags) 71{ 72 flags.r = 1; 73 return flags; 74} 75 76static inline struct openflags of_write(struct openflags flags) 77{ 78 flags.w = 1; 79 return flags; 80} 81 82static inline struct openflags of_rdwr(struct openflags flags) 83{ 84 return of_read(of_write(flags)); 85} 86 87static 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 94static inline struct openflags of_sync(struct openflags flags) 95{ 96 flags.s = 1; 97 return flags; 98} 99 100static inline struct openflags of_create(struct openflags flags) 101{ 102 flags.c = 1; 103 return flags; 104} 105 106static inline struct openflags of_trunc(struct openflags flags) 107{ 108 flags.t = 1; 109 return flags; 110} 111 112static inline struct openflags of_append(struct openflags flags) 113{ 114 flags.a = 1; 115 return flags; 116} 117 118static inline struct openflags of_excl(struct openflags flags) 119{ 120 flags.e = 1; 121 return flags; 122} 123 124static inline struct openflags of_cloexec(struct openflags flags) 125{ 126 flags.cl = 1; 127 return flags; 128} 129 130/* file.c */ 131extern int os_stat_file(const char *file_name, struct uml_stat *buf); 132extern int os_stat_fd(const int fd, struct uml_stat *buf); 133extern int os_access(const char *file, int mode); 134extern int os_set_exec_close(int fd); 135extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); 136extern int os_get_ifname(int fd, char *namebuf); 137extern int os_set_slip(int fd); 138extern int os_mode_fd(int fd, int mode); 139extern int os_fsync_file(int fd); 140 141extern int os_seek_file(int fd, unsigned long long offset); 142extern int os_open_file(const char *file, struct openflags flags, int mode); 143extern int os_read_file(int fd, void *buf, int len); 144extern int os_write_file(int fd, const void *buf, int count); 145extern int os_sync_file(int fd); 146extern int os_file_size(const char *file, unsigned long long *size_out); 147extern int os_file_modtime(const char *file, unsigned long *modtime); 148extern int os_pipe(int *fd, int stream, int close_on_exec); 149extern int os_set_fd_async(int fd); 150extern int os_clear_fd_async(int fd); 151extern int os_set_fd_block(int fd, int blocking); 152extern int os_accept_connection(int fd); 153extern int os_create_unix_socket(const char *file, int len, int close_on_exec); 154extern int os_shutdown_socket(int fd, int r, int w); 155extern void os_close_file(int fd); 156extern int os_rcv_fd(int fd, int *helper_pid_out); 157extern int create_unix_socket(char *file, int len, int close_on_exec); 158extern int os_connect_socket(const char *name); 159extern int os_file_type(char *file); 160extern int os_file_mode(const char *file, struct openflags *mode_out); 161extern int os_lock_file(int fd, int excl); 162extern void os_flush_stdout(void); 163extern int os_stat_filesystem(char *path, long *bsize_out, 164 long long *blocks_out, long long *bfree_out, 165 long long *bavail_out, long long *files_out, 166 long long *ffree_out, void *fsid_out, 167 int fsid_size, long *namelen_out, 168 long *spare_out); 169extern int os_change_dir(char *dir); 170extern int os_fchange_dir(int fd); 171extern unsigned os_major(unsigned long long dev); 172extern unsigned os_minor(unsigned long long dev); 173extern unsigned long long os_makedev(unsigned major, unsigned minor); 174 175/* start_up.c */ 176extern void os_early_checks(void); 177extern void can_do_skas(void); 178extern void os_check_bugs(void); 179extern void check_host_supports_tls(int *supports_tls, int *tls_min); 180 181/* mem.c */ 182extern int create_mem_file(unsigned long long len); 183 184/* process.c */ 185extern unsigned long os_process_pc(int pid); 186extern int os_process_parent(int pid); 187extern void os_stop_process(int pid); 188extern void os_kill_process(int pid, int reap_child); 189extern void os_kill_ptraced_process(int pid, int reap_child); 190extern long os_ptrace_ldt(long pid, long addr, long data); 191 192extern int os_getpid(void); 193extern int os_getpgrp(void); 194 195extern void init_new_thread_signals(void); 196 197extern int os_map_memory(void *virt, int fd, unsigned long long off, 198 unsigned long len, int r, int w, int x); 199extern int os_protect_memory(void *addr, unsigned long len, 200 int r, int w, int x); 201extern int os_unmap_memory(void *addr, int len); 202extern int os_drop_memory(void *addr, int length); 203extern int can_drop_memory(void); 204extern void os_flush_stdout(void); 205extern int os_mincore(void *addr, unsigned long len); 206 207/* execvp.c */ 208extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); 209/* helper.c */ 210extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv); 211extern int run_helper_thread(int (*proc)(void *), void *arg, 212 unsigned int flags, unsigned long *stack_out); 213extern int helper_wait(int pid); 214 215 216/* umid.c */ 217extern int umid_file_name(char *name, char *buf, int len); 218extern int set_umid(char *name); 219extern char *get_umid(void); 220 221/* signal.c */ 222extern void timer_init(void); 223extern void set_sigstack(void *sig_stack, int size); 224extern void remove_sigstack(void); 225extern void set_handler(int sig); 226extern int change_sig(int signal, int on); 227extern void block_signals(void); 228extern void unblock_signals(void); 229extern int get_signals(void); 230extern int set_signals(int enable); 231extern int os_is_signal_stack(void); 232 233/* util.c */ 234extern void stack_protections(unsigned long address); 235extern int raw(int fd); 236extern void setup_machinename(char *machine_out); 237extern void setup_hostinfo(char *buf, int len); 238extern void os_dump_core(void) __attribute__ ((noreturn)); 239extern void um_early_printk(const char *s, unsigned int n); 240extern void os_fix_helper_signals(void); 241 242/* time.c */ 243extern void idle_sleep(unsigned long long nsecs); 244extern int set_interval(void); 245extern int timer_one_shot(int ticks); 246extern long long disable_timer(void); 247extern void uml_idle_timer(void); 248extern long long os_nsecs(void); 249 250/* skas/mem.c */ 251extern long run_syscall_stub(struct mm_id * mm_idp, 252 int syscall, unsigned long *args, long expected, 253 void **addr, int done); 254extern long syscall_stub_data(struct mm_id * mm_idp, 255 unsigned long *data, int data_count, 256 void **addr, void **stub_addr); 257extern int map(struct mm_id * mm_idp, unsigned long virt, 258 unsigned long len, int prot, int phys_fd, 259 unsigned long long offset, int done, void **data); 260extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, 261 int done, void **data); 262extern int protect(struct mm_id * mm_idp, unsigned long addr, 263 unsigned long len, unsigned int prot, int done, void **data); 264 265/* skas/process.c */ 266extern int is_skas_winch(int pid, int fd, void *data); 267extern int start_userspace(unsigned long stub_stack); 268extern int copy_context_skas0(unsigned long stack, int pid); 269extern void userspace(struct uml_pt_regs *regs); 270extern int map_stub_pages(int fd, unsigned long code, unsigned long data, 271 unsigned long stack); 272extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)); 273extern void switch_threads(jmp_buf *me, jmp_buf *you); 274extern int start_idle_thread(void *stack, jmp_buf *switch_buf); 275extern void initial_thread_cb_skas(void (*proc)(void *), 276 void *arg); 277extern void halt_skas(void); 278extern void reboot_skas(void); 279 280/* irq.c */ 281extern int os_waiting_for_events(struct irq_fd *active_fds); 282extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds); 283extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg, 284 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2); 285extern void os_free_irq_later(struct irq_fd *active_fds, 286 int irq, void *dev_id); 287extern int os_get_pollfd(int i); 288extern void os_set_pollfd(int i, int fd); 289extern void os_set_ioignore(void); 290 291/* sigio.c */ 292extern int add_sigio_fd(int fd); 293extern int ignore_sigio_fd(int fd); 294extern void maybe_sigio_broken(int fd, int read); 295extern void sigio_broken(int fd, int read); 296 297/* sys-x86_64/prctl.c */ 298extern int os_arch_prctl(int pid, int code, unsigned long *addr); 299 300/* tty.c */ 301extern int get_pty(void); 302 303/* sys-$ARCH/task_size.c */ 304extern unsigned long os_get_top_address(void); 305 306#endif 307