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1/*
2 * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
3 * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
4 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
5 * Licensed under the GPL
6 */
7
8#ifndef __OS_H__
9#define __OS_H__
10
11#include <stdarg.h>
12#include <irq_user.h>
13#include <longjmp.h>
14#include <mm_id.h>
15
16#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
17
18#define OS_TYPE_FILE 1
19#define OS_TYPE_DIR 2
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
25
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 */
32
33#ifdef CONFIG_64BIT
34#define OS_LIB_PATH "/usr/lib64/"
35#else
36#define OS_LIB_PATH "/usr/lib/"
37#endif
38
39/*
40 * types taken from stat_file() in hostfs_user.c
41 * (if they are wrong here, they are wrong there...).
42 */
43struct uml_stat {
44 int ust_dev; /* device */
45 unsigned long long ust_ino; /* inode */
46 int ust_mode; /* protection */
47 int ust_nlink; /* number of hard links */
48 int ust_uid; /* user ID of owner */
49 int ust_gid; /* group ID of owner */
50 unsigned long long ust_size; /* total size, in bytes */
51 int ust_blksize; /* blocksize for filesystem I/O */
52 unsigned long long ust_blocks; /* number of blocks allocated */
53 unsigned long ust_atime; /* time of last access */
54 unsigned long ust_mtime; /* time of last modification */
55 unsigned long ust_ctime; /* time of last change */
56};
57
58struct openflags {
59 unsigned int r : 1;
60 unsigned int w : 1;
61 unsigned int s : 1; /* O_SYNC */
62 unsigned int c : 1; /* O_CREAT */
63 unsigned int t : 1; /* O_TRUNC */
64 unsigned int a : 1; /* O_APPEND */
65 unsigned int e : 1; /* O_EXCL */
66 unsigned int cl : 1; /* FD_CLOEXEC */
67};
68
69#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
70 .t = 0, .a = 0, .e = 0, .cl = 0 })
71
72static inline struct openflags of_read(struct openflags flags)
73{
74 flags.r = 1;
75 return flags;
76}
77
78static inline struct openflags of_write(struct openflags flags)
79{
80 flags.w = 1;
81 return flags;
82}
83
84static inline struct openflags of_rdwr(struct openflags flags)
85{
86 return of_read(of_write(flags));
87}
88
89static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
90{
91 flags.r = r;
92 flags.w = w;
93 return flags;
94}
95
96static inline struct openflags of_sync(struct openflags flags)
97{
98 flags.s = 1;
99 return flags;
100}
101
102static inline struct openflags of_create(struct openflags flags)
103{
104 flags.c = 1;
105 return flags;
106}
107
108static inline struct openflags of_trunc(struct openflags flags)
109{
110 flags.t = 1;
111 return flags;
112}
113
114static inline struct openflags of_append(struct openflags flags)
115{
116 flags.a = 1;
117 return flags;
118}
119
120static inline struct openflags of_excl(struct openflags flags)
121{
122 flags.e = 1;
123 return flags;
124}
125
126static inline struct openflags of_cloexec(struct openflags flags)
127{
128 flags.cl = 1;
129 return flags;
130}
131
132/* file.c */
133extern int os_stat_file(const char *file_name, struct uml_stat *buf);
134extern int os_stat_fd(const int fd, struct uml_stat *buf);
135extern int os_access(const char *file, int mode);
136extern int os_set_exec_close(int fd);
137extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
138extern int os_get_ifname(int fd, char *namebuf);
139extern int os_set_slip(int fd);
140extern int os_mode_fd(int fd, int mode);
141extern int os_fsync_file(int fd);
142
143extern int os_seek_file(int fd, unsigned long long offset);
144extern int os_open_file(const char *file, struct openflags flags, int mode);
145extern int os_read_file(int fd, void *buf, int len);
146extern int os_write_file(int fd, const void *buf, int count);
147extern int os_sync_file(int fd);
148extern int os_file_size(const char *file, unsigned long long *size_out);
149extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset);
150extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
151extern int os_file_modtime(const char *file, unsigned long *modtime);
152extern int os_pipe(int *fd, int stream, int close_on_exec);
153extern int os_set_fd_async(int fd);
154extern int os_clear_fd_async(int fd);
155extern int os_set_fd_block(int fd, int blocking);
156extern int os_accept_connection(int fd);
157extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
158extern int os_shutdown_socket(int fd, int r, int w);
159extern void os_close_file(int fd);
160extern int os_rcv_fd(int fd, int *helper_pid_out);
161extern int create_unix_socket(char *file, int len, int close_on_exec);
162extern int os_connect_socket(const char *name);
163extern int os_file_type(char *file);
164extern int os_file_mode(const char *file, struct openflags *mode_out);
165extern int os_lock_file(int fd, int excl);
166extern void os_flush_stdout(void);
167extern int os_stat_filesystem(char *path, long *bsize_out,
168 long long *blocks_out, long long *bfree_out,
169 long long *bavail_out, long long *files_out,
170 long long *ffree_out, void *fsid_out,
171 int fsid_size, long *namelen_out,
172 long *spare_out);
173extern int os_change_dir(char *dir);
174extern int os_fchange_dir(int fd);
175extern unsigned os_major(unsigned long long dev);
176extern unsigned os_minor(unsigned long long dev);
177extern unsigned long long os_makedev(unsigned major, unsigned minor);
178
179/* start_up.c */
180extern void os_early_checks(void);
181extern void os_check_bugs(void);
182extern void check_host_supports_tls(int *supports_tls, int *tls_min);
183
184/* mem.c */
185extern int create_mem_file(unsigned long long len);
186
187/* process.c */
188extern unsigned long os_process_pc(int pid);
189extern int os_process_parent(int pid);
190extern void os_alarm_process(int pid);
191extern void os_stop_process(int pid);
192extern void os_kill_process(int pid, int reap_child);
193extern void os_kill_ptraced_process(int pid, int reap_child);
194
195extern int os_getpid(void);
196extern int os_getpgrp(void);
197
198extern void init_new_thread_signals(void);
199
200extern int os_map_memory(void *virt, int fd, unsigned long long off,
201 unsigned long len, int r, int w, int x);
202extern int os_protect_memory(void *addr, unsigned long len,
203 int r, int w, int x);
204extern int os_unmap_memory(void *addr, int len);
205extern int os_drop_memory(void *addr, int length);
206extern int can_drop_memory(void);
207extern void os_flush_stdout(void);
208extern int os_mincore(void *addr, unsigned long len);
209
210/* execvp.c */
211extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
212/* helper.c */
213extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
214extern int run_helper_thread(int (*proc)(void *), void *arg,
215 unsigned int flags, unsigned long *stack_out);
216extern int helper_wait(int pid);
217
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_set_signal_handler(void);
226extern void set_sigstack(void *sig_stack, int size);
227extern void remove_sigstack(void);
228extern void set_handler(int sig);
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);
234extern int os_is_signal_stack(void);
235extern void deliver_alarm(void);
236
237/* util.c */
238extern void stack_protections(unsigned long address);
239extern int raw(int fd);
240extern void setup_machinename(char *machine_out);
241extern void setup_hostinfo(char *buf, int len);
242extern void os_dump_core(void) __attribute__ ((noreturn));
243extern void um_early_printk(const char *s, unsigned int n);
244extern void os_fix_helper_signals(void);
245extern void os_info(const char *fmt, ...)
246 __attribute__ ((format (printf, 1, 2)));
247extern void os_warn(const char *fmt, ...)
248 __attribute__ ((format (printf, 1, 2)));
249
250/* time.c */
251extern void os_idle_sleep(unsigned long long nsecs);
252extern int os_timer_create(void* timer);
253extern int os_timer_set_interval(void* timer, void* its);
254extern int os_timer_one_shot(int ticks);
255extern long long os_timer_disable(void);
256extern long os_timer_remain(void* timer);
257extern void uml_idle_timer(void);
258extern long long os_persistent_clock_emulation(void);
259extern long long os_nsecs(void);
260extern long long os_vnsecs(void);
261
262/* skas/mem.c */
263extern long run_syscall_stub(struct mm_id * mm_idp,
264 int syscall, unsigned long *args, long expected,
265 void **addr, int done);
266extern long syscall_stub_data(struct mm_id * mm_idp,
267 unsigned long *data, int data_count,
268 void **addr, void **stub_addr);
269extern int map(struct mm_id * mm_idp, unsigned long virt,
270 unsigned long len, int prot, int phys_fd,
271 unsigned long long offset, int done, void **data);
272extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
273 int done, void **data);
274extern int protect(struct mm_id * mm_idp, unsigned long addr,
275 unsigned long len, unsigned int prot, int done, void **data);
276
277/* skas/process.c */
278extern int is_skas_winch(int pid, int fd, void *data);
279extern int start_userspace(unsigned long stub_stack);
280extern int copy_context_skas0(unsigned long stack, int pid);
281extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs);
282extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
283 unsigned long stack);
284extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
285extern void switch_threads(jmp_buf *me, jmp_buf *you);
286extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
287extern void initial_thread_cb_skas(void (*proc)(void *),
288 void *arg);
289extern void halt_skas(void);
290extern void reboot_skas(void);
291
292/* irq.c */
293extern int os_waiting_for_events_epoll(void);
294extern void *os_epoll_get_data_pointer(int index);
295extern int os_epoll_triggered(int index, int events);
296extern int os_event_mask(int irq_type);
297extern int os_setup_epoll(void);
298extern int os_add_epoll_fd(int events, int fd, void *data);
299extern int os_mod_epoll_fd(int events, int fd, void *data);
300extern int os_del_epoll_fd(int fd);
301extern void os_set_ioignore(void);
302extern void os_close_epoll_fd(void);
303
304/* sigio.c */
305extern int add_sigio_fd(int fd);
306extern int ignore_sigio_fd(int fd);
307extern void maybe_sigio_broken(int fd, int read);
308extern void sigio_broken(int fd, int read);
309
310/* prctl.c */
311extern int os_arch_prctl(int pid, int option, unsigned long *arg2);
312
313/* tty.c */
314extern int get_pty(void);
315
316/* sys-$ARCH/task_size.c */
317extern unsigned long os_get_top_address(void);
318
319long syscall(long number, ...);
320
321#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
4 * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
5 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 */
7
8#ifndef __OS_H__
9#define __OS_H__
10
11#include <stdarg.h>
12#include <irq_user.h>
13#include <longjmp.h>
14#include <mm_id.h>
15
16#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
17
18#define OS_TYPE_FILE 1
19#define OS_TYPE_DIR 2
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
25
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 */
32
33#ifdef CONFIG_64BIT
34#define OS_LIB_PATH "/usr/lib64/"
35#else
36#define OS_LIB_PATH "/usr/lib/"
37#endif
38
39#define OS_SENDMSG_MAX_FDS 8
40
41/*
42 * types taken from stat_file() in hostfs_user.c
43 * (if they are wrong here, they are wrong there...).
44 */
45struct uml_stat {
46 int ust_dev; /* device */
47 unsigned long long ust_ino; /* inode */
48 int ust_mode; /* protection */
49 int ust_nlink; /* number of hard links */
50 int ust_uid; /* user ID of owner */
51 int ust_gid; /* group ID of owner */
52 unsigned long long ust_size; /* total size, in bytes */
53 int ust_blksize; /* blocksize for filesystem I/O */
54 unsigned long long ust_blocks; /* number of blocks allocated */
55 unsigned long ust_atime; /* time of last access */
56 unsigned long ust_mtime; /* time of last modification */
57 unsigned long ust_ctime; /* time of last change */
58};
59
60struct openflags {
61 unsigned int r : 1;
62 unsigned int w : 1;
63 unsigned int s : 1; /* O_SYNC */
64 unsigned int c : 1; /* O_CREAT */
65 unsigned int t : 1; /* O_TRUNC */
66 unsigned int a : 1; /* O_APPEND */
67 unsigned int e : 1; /* O_EXCL */
68 unsigned int cl : 1; /* FD_CLOEXEC */
69};
70
71#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
72 .t = 0, .a = 0, .e = 0, .cl = 0 })
73
74static inline struct openflags of_read(struct openflags flags)
75{
76 flags.r = 1;
77 return flags;
78}
79
80static inline struct openflags of_write(struct openflags flags)
81{
82 flags.w = 1;
83 return flags;
84}
85
86static inline struct openflags of_rdwr(struct openflags flags)
87{
88 return of_read(of_write(flags));
89}
90
91static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
92{
93 flags.r = r;
94 flags.w = w;
95 return flags;
96}
97
98static inline struct openflags of_sync(struct openflags flags)
99{
100 flags.s = 1;
101 return flags;
102}
103
104static inline struct openflags of_create(struct openflags flags)
105{
106 flags.c = 1;
107 return flags;
108}
109
110static inline struct openflags of_trunc(struct openflags flags)
111{
112 flags.t = 1;
113 return flags;
114}
115
116static inline struct openflags of_append(struct openflags flags)
117{
118 flags.a = 1;
119 return flags;
120}
121
122static inline struct openflags of_excl(struct openflags flags)
123{
124 flags.e = 1;
125 return flags;
126}
127
128static inline struct openflags of_cloexec(struct openflags flags)
129{
130 flags.cl = 1;
131 return flags;
132}
133
134/* file.c */
135extern int os_stat_file(const char *file_name, struct uml_stat *buf);
136extern int os_stat_fd(const int fd, struct uml_stat *buf);
137extern int os_access(const char *file, int mode);
138extern int os_set_exec_close(int fd);
139extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
140extern int os_get_ifname(int fd, char *namebuf);
141extern int os_set_slip(int fd);
142extern int os_mode_fd(int fd, int mode);
143extern int os_fsync_file(int fd);
144
145extern int os_seek_file(int fd, unsigned long long offset);
146extern int os_open_file(const char *file, struct openflags flags, int mode);
147extern int os_read_file(int fd, void *buf, int len);
148extern int os_write_file(int fd, const void *buf, int count);
149extern int os_sync_file(int fd);
150extern int os_file_size(const char *file, unsigned long long *size_out);
151extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset);
152extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
153extern int os_file_modtime(const char *file, long long *modtime);
154extern int os_pipe(int *fd, int stream, int close_on_exec);
155extern int os_set_fd_async(int fd);
156extern int os_clear_fd_async(int fd);
157extern int os_set_fd_block(int fd, int blocking);
158extern int os_accept_connection(int fd);
159extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
160extern int os_shutdown_socket(int fd, int r, int w);
161extern void os_close_file(int fd);
162extern int os_rcv_fd(int fd, int *helper_pid_out);
163extern int create_unix_socket(char *file, int len, int close_on_exec);
164extern int os_connect_socket(const char *name);
165extern int os_file_type(char *file);
166extern int os_file_mode(const char *file, struct openflags *mode_out);
167extern int os_lock_file(int fd, int excl);
168extern void os_flush_stdout(void);
169extern int os_stat_filesystem(char *path, long *bsize_out,
170 long long *blocks_out, long long *bfree_out,
171 long long *bavail_out, long long *files_out,
172 long long *ffree_out, void *fsid_out,
173 int fsid_size, long *namelen_out,
174 long *spare_out);
175extern int os_change_dir(char *dir);
176extern int os_fchange_dir(int fd);
177extern unsigned os_major(unsigned long long dev);
178extern unsigned os_minor(unsigned long long dev);
179extern unsigned long long os_makedev(unsigned major, unsigned minor);
180extern int os_falloc_punch(int fd, unsigned long long offset, int count);
181extern int os_eventfd(unsigned int initval, int flags);
182extern int os_sendmsg_fds(int fd, const void *buf, unsigned int len,
183 const int *fds, unsigned int fds_num);
184int os_poll(unsigned int n, const int *fds);
185
186/* start_up.c */
187extern void os_early_checks(void);
188extern void os_check_bugs(void);
189extern void check_host_supports_tls(int *supports_tls, int *tls_min);
190extern void get_host_cpu_features(
191 void (*flags_helper_func)(char *line),
192 void (*cache_helper_func)(char *line));
193
194/* mem.c */
195extern int create_mem_file(unsigned long long len);
196
197/* process.c */
198extern unsigned long os_process_pc(int pid);
199extern int os_process_parent(int pid);
200extern void os_alarm_process(int pid);
201extern void os_stop_process(int pid);
202extern void os_kill_process(int pid, int reap_child);
203extern void os_kill_ptraced_process(int pid, int reap_child);
204
205extern int os_getpid(void);
206extern int os_getpgrp(void);
207
208extern void init_new_thread_signals(void);
209
210extern int os_map_memory(void *virt, int fd, unsigned long long off,
211 unsigned long len, int r, int w, int x);
212extern int os_protect_memory(void *addr, unsigned long len,
213 int r, int w, int x);
214extern int os_unmap_memory(void *addr, int len);
215extern int os_drop_memory(void *addr, int length);
216extern int can_drop_memory(void);
217extern int os_mincore(void *addr, unsigned long len);
218
219/* execvp.c */
220extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
221/* helper.c */
222extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
223extern int run_helper_thread(int (*proc)(void *), void *arg,
224 unsigned int flags, unsigned long *stack_out);
225extern int helper_wait(int pid);
226
227
228/* umid.c */
229extern int umid_file_name(char *name, char *buf, int len);
230extern int set_umid(char *name);
231extern char *get_umid(void);
232
233/* signal.c */
234extern void timer_set_signal_handler(void);
235extern void set_sigstack(void *sig_stack, int size);
236extern void remove_sigstack(void);
237extern void set_handler(int sig);
238extern void send_sigio_to_self(void);
239extern int change_sig(int signal, int on);
240extern void block_signals(void);
241extern void unblock_signals(void);
242extern int set_signals(int enable);
243extern int set_signals_trace(int enable);
244extern int os_is_signal_stack(void);
245extern void deliver_alarm(void);
246extern void register_pm_wake_signal(void);
247extern void block_signals_hard(void);
248extern void unblock_signals_hard(void);
249extern void mark_sigio_pending(void);
250
251/* util.c */
252extern void stack_protections(unsigned long address);
253extern int raw(int fd);
254extern void setup_machinename(char *machine_out);
255extern void setup_hostinfo(char *buf, int len);
256extern void os_dump_core(void) __attribute__ ((noreturn));
257extern void um_early_printk(const char *s, unsigned int n);
258extern void os_fix_helper_signals(void);
259extern void os_info(const char *fmt, ...)
260 __attribute__ ((format (printf, 1, 2)));
261extern void os_warn(const char *fmt, ...)
262 __attribute__ ((format (printf, 1, 2)));
263
264/* time.c */
265extern void os_idle_sleep(void);
266extern int os_timer_create(void);
267extern int os_timer_set_interval(unsigned long long nsecs);
268extern int os_timer_one_shot(unsigned long long nsecs);
269extern void os_timer_disable(void);
270extern void uml_idle_timer(void);
271extern long long os_persistent_clock_emulation(void);
272extern long long os_nsecs(void);
273
274/* skas/mem.c */
275extern long run_syscall_stub(struct mm_id * mm_idp,
276 int syscall, unsigned long *args, long expected,
277 void **addr, int done);
278extern long syscall_stub_data(struct mm_id * mm_idp,
279 unsigned long *data, int data_count,
280 void **addr, void **stub_addr);
281extern int map(struct mm_id * mm_idp, unsigned long virt,
282 unsigned long len, int prot, int phys_fd,
283 unsigned long long offset, int done, void **data);
284extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
285 int done, void **data);
286extern int protect(struct mm_id * mm_idp, unsigned long addr,
287 unsigned long len, unsigned int prot, int done, void **data);
288
289/* skas/process.c */
290extern int is_skas_winch(int pid, int fd, void *data);
291extern int start_userspace(unsigned long stub_stack);
292extern int copy_context_skas0(unsigned long stack, int pid);
293extern void userspace(struct uml_pt_regs *regs, unsigned long *aux_fp_regs);
294extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
295 unsigned long stack);
296extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
297extern void switch_threads(jmp_buf *me, jmp_buf *you);
298extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
299extern void initial_thread_cb_skas(void (*proc)(void *),
300 void *arg);
301extern void halt_skas(void);
302extern void reboot_skas(void);
303
304/* irq.c */
305extern int os_waiting_for_events_epoll(void);
306extern void *os_epoll_get_data_pointer(int index);
307extern int os_epoll_triggered(int index, int events);
308extern int os_event_mask(enum um_irq_type irq_type);
309extern int os_setup_epoll(void);
310extern int os_add_epoll_fd(int events, int fd, void *data);
311extern int os_mod_epoll_fd(int events, int fd, void *data);
312extern int os_del_epoll_fd(int fd);
313extern void os_set_ioignore(void);
314extern void os_close_epoll_fd(void);
315extern void um_irqs_suspend(void);
316extern void um_irqs_resume(void);
317
318/* sigio.c */
319extern int add_sigio_fd(int fd);
320extern int ignore_sigio_fd(int fd);
321extern void maybe_sigio_broken(int fd);
322extern void sigio_broken(int fd);
323/*
324 * unlocked versions for IRQ controller code.
325 *
326 * This is safe because it's used at suspend/resume and nothing
327 * else is running.
328 */
329extern int __add_sigio_fd(int fd);
330extern int __ignore_sigio_fd(int fd);
331
332/* prctl.c */
333extern int os_arch_prctl(int pid, int option, unsigned long *arg2);
334
335/* tty.c */
336extern int get_pty(void);
337
338/* sys-$ARCH/task_size.c */
339extern unsigned long os_get_top_address(void);
340
341long syscall(long number, ...);
342
343/* irqflags tracing */
344extern void block_signals_trace(void);
345extern void unblock_signals_trace(void);
346extern void um_trace_signals_on(void);
347extern void um_trace_signals_off(void);
348
349/* time-travel */
350extern void deliver_time_travel_irqs(void);
351
352#endif