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