2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
13 #include "sysdep/tls.h"
14 #include "../os/include/file.h"
16 #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
18 #define OS_TYPE_FILE 1
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
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 */
34 * types taken from stat_file() in hostfs_user.c
35 * (if they are wrong here, they are wrong there...).
38 int ust_dev; /* device */
39 unsigned long long ust_ino; /* inode */
40 int ust_mode; /* protection */
41 int ust_nlink; /* number of hard links */
42 int ust_uid; /* user ID of owner */
43 int ust_gid; /* group ID of owner */
44 unsigned long long ust_size; /* total size, in bytes */
45 int ust_blksize; /* blocksize for filesystem I/O */
46 unsigned long long ust_blocks; /* number of blocks allocated */
47 unsigned long ust_atime; /* time of last access */
48 unsigned long ust_mtime; /* time of last modification */
49 unsigned long ust_ctime; /* time of last change */
55 unsigned int s : 1; /* O_SYNC */
56 unsigned int c : 1; /* O_CREAT */
57 unsigned int t : 1; /* O_TRUNC */
58 unsigned int a : 1; /* O_APPEND */
59 unsigned int e : 1; /* O_EXCL */
60 unsigned int cl : 1; /* FD_CLOEXEC */
63 #define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
64 .t = 0, .a = 0, .e = 0, .cl = 0 })
66 static inline struct openflags of_read(struct openflags flags)
72 static inline struct openflags of_write(struct openflags flags)
78 static inline struct openflags of_rdwr(struct openflags flags)
80 return of_read(of_write(flags));
83 static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
90 static inline struct openflags of_sync(struct openflags flags)
96 static inline struct openflags of_create(struct openflags flags)
102 static inline struct openflags of_trunc(struct openflags flags)
108 static inline struct openflags of_append(struct openflags flags)
114 static inline struct openflags of_excl(struct openflags flags)
120 static inline struct openflags of_cloexec(struct openflags flags)
127 extern int os_stat_file(const char *file_name, struct uml_stat *buf);
128 extern int os_stat_fd(const int fd, struct uml_stat *buf);
129 extern int os_access(const char *file, int mode);
130 extern int os_get_exec_close(int fd, int *close_on_exec);
131 extern int os_set_exec_close(int fd);
132 extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
133 extern int os_get_ifname(int fd, char *namebuf);
134 extern int os_set_slip(int fd);
135 extern int os_set_owner(int fd, int pid);
136 extern int os_mode_fd(int fd, int mode);
138 extern int os_seek_file(int fd, unsigned long long offset);
139 extern int os_open_file(const char *file, struct openflags flags, int mode);
140 extern int os_read_file(int fd, void *buf, int len);
141 extern int os_write_file(int fd, const void *buf, int count);
142 extern int os_file_size(const char *file, unsigned long long *size_out);
143 extern int os_file_modtime(const char *file, unsigned long *modtime);
144 extern int os_pipe(int *fd, int stream, int close_on_exec);
145 extern int os_set_fd_async(int fd, int owner);
146 extern int os_clear_fd_async(int fd);
147 extern int os_set_fd_block(int fd, int blocking);
148 extern int os_accept_connection(int fd);
149 extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
150 extern int os_shutdown_socket(int fd, int r, int w);
151 extern void os_close_file(int fd);
152 extern int os_rcv_fd(int fd, int *helper_pid_out);
153 extern int create_unix_socket(char *file, int len, int close_on_exec);
154 extern int os_connect_socket(const char *name);
155 extern int os_file_type(char *file);
156 extern int os_file_mode(const char *file, struct openflags *mode_out);
157 extern int os_lock_file(int fd, int excl);
158 extern void os_flush_stdout(void);
159 extern int os_stat_filesystem(char *path, long *bsize_out,
160 long long *blocks_out, long long *bfree_out,
161 long long *bavail_out, long long *files_out,
162 long long *ffree_out, void *fsid_out,
163 int fsid_size, long *namelen_out,
165 extern int os_change_dir(char *dir);
166 extern int os_fchange_dir(int fd);
169 extern void os_early_checks(void);
170 extern void can_do_skas(void);
171 extern void os_check_bugs(void);
172 extern void check_host_supports_tls(int *supports_tls, int *tls_min);
175 extern int create_mem_file(unsigned long long len);
178 extern unsigned long os_process_pc(int pid);
179 extern int os_process_parent(int pid);
180 extern void os_stop_process(int pid);
181 extern void os_kill_process(int pid, int reap_child);
182 extern void os_kill_ptraced_process(int pid, int reap_child);
183 extern long os_ptrace_ldt(long pid, long addr, long data);
185 extern int os_getpid(void);
186 extern int os_getpgrp(void);
188 extern void init_new_thread_signals(void);
189 extern int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr);
191 extern int os_map_memory(void *virt, int fd, unsigned long long off,
192 unsigned long len, int r, int w, int x);
193 extern int os_protect_memory(void *addr, unsigned long len,
194 int r, int w, int x);
195 extern int os_unmap_memory(void *addr, int len);
196 extern int os_drop_memory(void *addr, int length);
197 extern int can_drop_memory(void);
198 extern void os_flush_stdout(void);
201 extern 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);
207 extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
209 extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
210 extern int run_helper_thread(int (*proc)(void *), void *arg,
211 unsigned int flags, unsigned long *stack_out);
212 extern int helper_wait(int pid, int nohang, char *pname);
216 extern int os_set_thread_area(user_desc_t *info, int pid);
217 extern int os_get_thread_area(user_desc_t *info, int pid);
220 extern int umid_file_name(char *name, char *buf, int len);
221 extern int set_umid(char *name);
222 extern char *get_umid(void);
225 extern void timer_init(void);
226 extern void set_sigstack(void *sig_stack, int size);
227 extern void remove_sigstack(void);
228 extern void set_handler(int sig, void (*handler)(int), int flags, ...);
229 extern int change_sig(int signal, int on);
230 extern void block_signals(void);
231 extern void unblock_signals(void);
232 extern int get_signals(void);
233 extern int set_signals(int enable);
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 int setjmp_wrapper(void (*proc)(void *, void *), ...);
241 extern void os_dump_core(void);
244 extern void idle_sleep(unsigned long long nsecs);
245 extern int set_interval(void);
246 extern int timer_one_shot(int ticks);
247 extern long long disable_timer(void);
248 extern void uml_idle_timer(void);
249 extern long long os_nsecs(void);
252 extern long run_syscall_stub(struct mm_id * mm_idp,
253 int syscall, unsigned long *args, long expected,
254 void **addr, int done);
255 extern long syscall_stub_data(struct mm_id * mm_idp,
256 unsigned long *data, int data_count,
257 void **addr, void **stub_addr);
258 extern int map(struct mm_id * mm_idp, unsigned long virt,
259 unsigned long len, int prot, int phys_fd,
260 unsigned long long offset, int done, void **data);
261 extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
262 int done, void **data);
263 extern int protect(struct mm_id * mm_idp, unsigned long addr,
264 unsigned long len, unsigned int prot, int done, void **data);
267 extern int is_skas_winch(int pid, int fd, void *data);
268 extern int start_userspace(unsigned long stub_stack);
269 extern int copy_context_skas0(unsigned long stack, int pid);
270 extern void save_registers(int pid, struct uml_pt_regs *regs);
271 extern void restore_registers(int pid, struct uml_pt_regs *regs);
272 extern void userspace(struct uml_pt_regs *regs);
273 extern void map_stub_pages(int fd, unsigned long code,
274 unsigned long data, unsigned long stack);
275 extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
276 extern void switch_threads(jmp_buf *me, jmp_buf *you);
277 extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
278 extern void initial_thread_cb_skas(void (*proc)(void *),
280 extern void halt_skas(void);
281 extern void reboot_skas(void);
284 extern int os_waiting_for_events(struct irq_fd *active_fds);
285 extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
286 extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
287 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
288 extern void os_free_irq_later(struct irq_fd *active_fds,
289 int irq, void *dev_id);
290 extern int os_get_pollfd(int i);
291 extern void os_set_pollfd(int i, int fd);
292 extern void os_set_ioignore(void);
293 extern void init_irq_signals(int on_sigstack);
296 extern int add_sigio_fd(int fd);
297 extern int ignore_sigio_fd(int fd);
298 extern void maybe_sigio_broken(int fd, int read);
301 extern void sig_handler_common_skas(int sig, void *sc_ptr);
303 /* sys-x86_64/prctl.c */
304 extern int os_arch_prctl(int pid, int code, unsigned long *addr);