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 */ 36struct 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 51struct 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 65static inline struct openflags of_read(struct openflags flags) 66{ 67 flags.r = 1; 68 return flags; 69} 70 71static inline struct openflags of_write(struct openflags flags) 72{ 73 flags.w = 1; 74 return flags; 75} 76 77static inline struct openflags of_rdwr(struct openflags flags) 78{ 79 return of_read(of_write(flags)); 80} 81 82static 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 89static inline struct openflags of_sync(struct openflags flags) 90{ 91 flags.s = 1; 92 return flags; 93} 94 95static inline struct openflags of_create(struct openflags flags) 96{ 97 flags.c = 1; 98 return flags; 99} 100 101static inline struct openflags of_trunc(struct openflags flags) 102{ 103 flags.t = 1; 104 return flags; 105} 106 107static inline struct openflags of_append(struct openflags flags) 108{ 109 flags.a = 1; 110 return flags; 111} 112 113static inline struct openflags of_excl(struct openflags flags) 114{ 115 flags.e = 1; 116 return flags; 117} 118 119static inline struct openflags of_cloexec(struct openflags flags) 120{ 121 flags.cl = 1; 122 return flags; 123} 124 125/* file.c */ 126extern int os_stat_file(const char *file_name, struct uml_stat *buf); 127extern int os_stat_fd(const int fd, struct uml_stat *buf); 128extern int os_access(const char *file, int mode); 129extern int os_set_exec_close(int fd); 130extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg); 131extern int os_get_ifname(int fd, char *namebuf); 132extern int os_set_slip(int fd); 133extern int os_mode_fd(int fd, int mode); 134 135extern int os_seek_file(int fd, unsigned long long offset); 136extern int os_open_file(const char *file, struct openflags flags, int mode); 137extern int os_read_file(int fd, void *buf, int len); 138extern int os_write_file(int fd, const void *buf, int count); 139extern int os_file_size(const char *file, unsigned long long *size_out); 140extern int os_file_modtime(const char *file, unsigned long *modtime); 141extern int os_pipe(int *fd, int stream, int close_on_exec); 142extern int os_set_fd_async(int fd); 143extern int os_clear_fd_async(int fd); 144extern int os_set_fd_block(int fd, int blocking); 145extern int os_accept_connection(int fd); 146extern int os_create_unix_socket(const char *file, int len, int close_on_exec); 147extern int os_shutdown_socket(int fd, int r, int w); 148extern void os_close_file(int fd); 149extern int os_rcv_fd(int fd, int *helper_pid_out); 150extern int create_unix_socket(char *file, int len, int close_on_exec); 151extern int os_connect_socket(const char *name); 152extern int os_file_type(char *file); 153extern int os_file_mode(const char *file, struct openflags *mode_out); 154extern int os_lock_file(int fd, int excl); 155extern void os_flush_stdout(void); 156extern 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); 162extern int os_change_dir(char *dir); 163extern int os_fchange_dir(int fd); 164extern unsigned os_major(unsigned long long dev); 165extern unsigned os_minor(unsigned long long dev); 166extern unsigned long long os_makedev(unsigned major, unsigned minor); 167 168/* start_up.c */ 169extern void os_early_checks(void); 170extern void can_do_skas(void); 171extern void os_check_bugs(void); 172extern void check_host_supports_tls(int *supports_tls, int *tls_min); 173 174/* mem.c */ 175extern int create_mem_file(unsigned long long len); 176 177/* process.c */ 178extern unsigned long os_process_pc(int pid); 179extern int os_process_parent(int pid); 180extern void os_stop_process(int pid); 181extern void os_kill_process(int pid, int reap_child); 182extern void os_kill_ptraced_process(int pid, int reap_child); 183extern long os_ptrace_ldt(long pid, long addr, long data); 184 185extern int os_getpid(void); 186extern int os_getpgrp(void); 187 188extern void init_new_thread_signals(void); 189extern int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr); 190 191extern int os_map_memory(void *virt, int fd, unsigned long long off, 192 unsigned long len, int r, int w, int x); 193extern int os_protect_memory(void *addr, unsigned long len, 194 int r, int w, int x); 195extern int os_unmap_memory(void *addr, int len); 196extern int os_drop_memory(void *addr, int length); 197extern int can_drop_memory(void); 198extern void os_flush_stdout(void); 199 200/* uaccess.c */ 201extern unsigned long __do_user_copy(void *to, const void *from, int n, 202 void **fault_addr, jmp_buf **fault_catcher, 203 void (*op)(void *to, const void *from, 204 int n), int *faulted_out); 205 206/* execvp.c */ 207extern int execvp_noalloc(char *buf, const char *file, char *const argv[]); 208/* helper.c */ 209extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv); 210extern int run_helper_thread(int (*proc)(void *), void *arg, 211 unsigned int flags, unsigned long *stack_out); 212extern int helper_wait(int pid); 213 214 215/* tls.c */ 216extern int os_set_thread_area(user_desc_t *info, int pid); 217extern int os_get_thread_area(user_desc_t *info, int pid); 218 219/* umid.c */ 220extern int umid_file_name(char *name, char *buf, int len); 221extern int set_umid(char *name); 222extern char *get_umid(void); 223 224/* signal.c */ 225extern void timer_init(void); 226extern void set_sigstack(void *sig_stack, int size); 227extern void remove_sigstack(void); 228extern void set_handler(int sig, void (*handler)(int), int flags, ...); 229extern int change_sig(int signal, int on); 230extern void block_signals(void); 231extern void unblock_signals(void); 232extern int get_signals(void); 233extern int set_signals(int enable); 234 235/* util.c */ 236extern void stack_protections(unsigned long address); 237extern int raw(int fd); 238extern void setup_machinename(char *machine_out); 239extern void setup_hostinfo(char *buf, int len); 240extern void os_dump_core(void) __attribute__ ((noreturn)); 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