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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
25#define OS_ACC_F_OK 0
26#define OS_ACC_X_OK 1
27#define OS_ACC_W_OK 2
28#define OS_ACC_R_OK 4
29#define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK)
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
39
40
41struct uml_stat {
42 int ust_dev;
43 unsigned long long ust_ino;
44 int ust_mode;
45 int ust_nlink;
46 int ust_uid;
47 int ust_gid;
48 unsigned long long ust_size;
49 int ust_blksize;
50 unsigned long long ust_blocks;
51 unsigned long ust_atime;
52 unsigned long ust_mtime;
53 unsigned long ust_ctime;
54};
55
56struct openflags {
57 unsigned int r : 1;
58 unsigned int w : 1;
59 unsigned int s : 1;
60 unsigned int c : 1;
61 unsigned int t : 1;
62 unsigned int a : 1;
63 unsigned int e : 1;
64 unsigned int cl : 1;
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
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);
139
140extern int os_seek_file(int fd, unsigned long long offset);
141extern int os_open_file(const char *file, struct openflags flags, int mode);
142extern int os_read_file(int fd, void *buf, int len);
143extern int os_write_file(int fd, const void *buf, int count);
144extern int os_file_size(const char *file, unsigned long long *size_out);
145extern int os_file_modtime(const char *file, unsigned long *modtime);
146extern int os_pipe(int *fd, int stream, int close_on_exec);
147extern int os_set_fd_async(int fd);
148extern int os_clear_fd_async(int fd);
149extern int os_set_fd_block(int fd, int blocking);
150extern int os_accept_connection(int fd);
151extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
152extern int os_shutdown_socket(int fd, int r, int w);
153extern void os_close_file(int fd);
154extern int os_rcv_fd(int fd, int *helper_pid_out);
155extern int create_unix_socket(char *file, int len, int close_on_exec);
156extern int os_connect_socket(const char *name);
157extern int os_file_type(char *file);
158extern int os_file_mode(const char *file, struct openflags *mode_out);
159extern int os_lock_file(int fd, int excl);
160extern void os_flush_stdout(void);
161extern 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);
167extern int os_change_dir(char *dir);
168extern int os_fchange_dir(int fd);
169extern unsigned os_major(unsigned long long dev);
170extern unsigned os_minor(unsigned long long dev);
171extern unsigned long long os_makedev(unsigned major, unsigned minor);
172
173
174extern void os_early_checks(void);
175extern void can_do_skas(void);
176extern void os_check_bugs(void);
177extern void check_host_supports_tls(int *supports_tls, int *tls_min);
178
179
180extern int create_mem_file(unsigned long long len);
181
182
183extern unsigned long os_process_pc(int pid);
184extern int os_process_parent(int pid);
185extern void os_stop_process(int pid);
186extern void os_kill_process(int pid, int reap_child);
187extern void os_kill_ptraced_process(int pid, int reap_child);
188extern long os_ptrace_ldt(long pid, long addr, long data);
189
190extern int os_getpid(void);
191extern int os_getpgrp(void);
192
193extern void init_new_thread_signals(void);
194
195extern int os_map_memory(void *virt, int fd, unsigned long long off,
196 unsigned long len, int r, int w, int x);
197extern int os_protect_memory(void *addr, unsigned long len,
198 int r, int w, int x);
199extern int os_unmap_memory(void *addr, int len);
200extern int os_drop_memory(void *addr, int length);
201extern int can_drop_memory(void);
202extern void os_flush_stdout(void);
203
204
205extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
206
207extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
208extern int run_helper_thread(int (*proc)(void *), void *arg,
209 unsigned int flags, unsigned long *stack_out);
210extern int helper_wait(int pid);
211
212
213
214extern int umid_file_name(char *name, char *buf, int len);
215extern int set_umid(char *name);
216extern char *get_umid(void);
217
218
219extern void timer_init(void);
220extern void set_sigstack(void *sig_stack, int size);
221extern void remove_sigstack(void);
222extern void set_handler(int sig);
223extern int change_sig(int signal, int on);
224extern void block_signals(void);
225extern void unblock_signals(void);
226extern int get_signals(void);
227extern int set_signals(int enable);
228
229
230extern void stack_protections(unsigned long address);
231extern int raw(int fd);
232extern void setup_machinename(char *machine_out);
233extern void setup_hostinfo(char *buf, int len);
234extern void os_dump_core(void) __attribute__ ((noreturn));
235extern void um_early_printk(const char *s, unsigned int n);
236
237
238extern void idle_sleep(unsigned long long nsecs);
239extern int set_interval(void);
240extern int timer_one_shot(int ticks);
241extern long long disable_timer(void);
242extern void uml_idle_timer(void);
243extern long long os_nsecs(void);
244
245
246extern long run_syscall_stub(struct mm_id * mm_idp,
247 int syscall, unsigned long *args, long expected,
248 void **addr, int done);
249extern long syscall_stub_data(struct mm_id * mm_idp,
250 unsigned long *data, int data_count,
251 void **addr, void **stub_addr);
252extern int map(struct mm_id * mm_idp, unsigned long virt,
253 unsigned long len, int prot, int phys_fd,
254 unsigned long long offset, int done, void **data);
255extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
256 int done, void **data);
257extern int protect(struct mm_id * mm_idp, unsigned long addr,
258 unsigned long len, unsigned int prot, int done, void **data);
259
260
261extern int is_skas_winch(int pid, int fd, void *data);
262extern int start_userspace(unsigned long stub_stack);
263extern int copy_context_skas0(unsigned long stack, int pid);
264extern void userspace(struct uml_pt_regs *regs);
265extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
266 unsigned long stack);
267extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
268extern void switch_threads(jmp_buf *me, jmp_buf *you);
269extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
270extern void initial_thread_cb_skas(void (*proc)(void *),
271 void *arg);
272extern void halt_skas(void);
273extern void reboot_skas(void);
274
275
276extern int os_waiting_for_events(struct irq_fd *active_fds);
277extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
278extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
279 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
280extern void os_free_irq_later(struct irq_fd *active_fds,
281 int irq, void *dev_id);
282extern int os_get_pollfd(int i);
283extern void os_set_pollfd(int i, int fd);
284extern void os_set_ioignore(void);
285
286
287extern int add_sigio_fd(int fd);
288extern int ignore_sigio_fd(int fd);
289extern void maybe_sigio_broken(int fd, int read);
290extern void sigio_broken(int fd, int read);
291
292
293extern int os_arch_prctl(int pid, int code, unsigned long *addr);
294
295
296extern int get_pty(void);
297
298
299extern unsigned long os_get_top_address(void);
300
301#endif
302