tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#ifdef CONFIG_64BIT
33#define OS_LIB_PATH "/usr/lib64/"
34#else
35#define OS_LIB_PATH "/usr/lib/"
36#endif
37
38/*
39 * types taken from stat_file() in hostfs_user.c
40 * (if they are wrong here, they are wrong there...).
41 */
42struct uml_stat {
43 int ust_dev; /* device */
44 unsigned long long ust_ino; /* inode */
45 int ust_mode; /* protection */
46 int ust_nlink; /* number of hard links */
47 int ust_uid; /* user ID of owner */
48 int ust_gid; /* group ID of owner */
49 unsigned long long ust_size; /* total size, in bytes */
50 int ust_blksize; /* blocksize for filesystem I/O */
51 unsigned long long ust_blocks; /* number of blocks allocated */
52 unsigned long ust_atime; /* time of last access */
53 unsigned long ust_mtime; /* time of last modification */
54 unsigned long ust_ctime; /* time of last change */
55};
56
57struct openflags {
58 unsigned int r : 1;
59 unsigned int w : 1;
60 unsigned int s : 1; /* O_SYNC */
61 unsigned int c : 1; /* O_CREAT */
62 unsigned int t : 1; /* O_TRUNC */
63 unsigned int a : 1; /* O_APPEND */
64 unsigned int e : 1; /* O_EXCL */
65 unsigned int cl : 1; /* FD_CLOEXEC */
66};
67
68#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
69 .t = 0, .a = 0, .e = 0, .cl = 0 })
70
71static inline struct openflags of_read(struct openflags flags)
72{
73 flags.r = 1;
74 return flags;
75}
76
77static inline struct openflags of_write(struct openflags flags)
78{
79 flags.w = 1;
80 return flags;
81}
82
83static inline struct openflags of_rdwr(struct openflags flags)
84{
85 return of_read(of_write(flags));
86}
87
88static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
89{
90 flags.r = r;
91 flags.w = w;
92 return flags;
93}
94
95static inline struct openflags of_sync(struct openflags flags)
96{
97 flags.s = 1;
98 return flags;
99}
100
101static inline struct openflags of_create(struct openflags flags)
102{
103 flags.c = 1;
104 return flags;
105}
106
107static inline struct openflags of_trunc(struct openflags flags)
108{
109 flags.t = 1;
110 return flags;
111}
112
113static inline struct openflags of_append(struct openflags flags)
114{
115 flags.a = 1;
116 return flags;
117}
118
119static inline struct openflags of_excl(struct openflags flags)
120{
121 flags.e = 1;
122 return flags;
123}
124
125static inline struct openflags of_cloexec(struct openflags flags)
126{
127 flags.cl = 1;
128 return flags;
129}
130
131/* file.c */
132extern int os_stat_file(const char *file_name, struct uml_stat *buf);
133extern int os_stat_fd(const int fd, struct uml_stat *buf);
134extern int os_access(const char *file, int mode);
135extern int os_set_exec_close(int fd);
136extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
137extern int os_get_ifname(int fd, char *namebuf);
138extern int os_set_slip(int fd);
139extern int os_mode_fd(int fd, int mode);
140
141extern int os_seek_file(int fd, unsigned long long offset);
142extern int os_open_file(const char *file, struct openflags flags, int mode);
143extern int os_read_file(int fd, void *buf, int len);
144extern int os_write_file(int fd, const void *buf, int count);
145extern int os_file_size(const char *file, unsigned long long *size_out);
146extern int os_file_modtime(const char *file, unsigned long *modtime);
147extern int os_pipe(int *fd, int stream, int close_on_exec);
148extern int os_set_fd_async(int fd);
149extern int os_clear_fd_async(int fd);
150extern int os_set_fd_block(int fd, int blocking);
151extern int os_accept_connection(int fd);
152extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
153extern int os_shutdown_socket(int fd, int r, int w);
154extern void os_close_file(int fd);
155extern int os_rcv_fd(int fd, int *helper_pid_out);
156extern int create_unix_socket(char *file, int len, int close_on_exec);
157extern int os_connect_socket(const char *name);
158extern int os_file_type(char *file);
159extern int os_file_mode(const char *file, struct openflags *mode_out);
160extern int os_lock_file(int fd, int excl);
161extern void os_flush_stdout(void);
162extern int os_stat_filesystem(char *path, long *bsize_out,
163 long long *blocks_out, long long *bfree_out,
164 long long *bavail_out, long long *files_out,
165 long long *ffree_out, void *fsid_out,
166 int fsid_size, long *namelen_out,
167 long *spare_out);
168extern int os_change_dir(char *dir);
169extern int os_fchange_dir(int fd);
170extern unsigned os_major(unsigned long long dev);
171extern unsigned os_minor(unsigned long long dev);
172extern unsigned long long os_makedev(unsigned major, unsigned minor);
173
174/* start_up.c */
175extern void os_early_checks(void);
176extern void can_do_skas(void);
177extern void os_check_bugs(void);
178extern void check_host_supports_tls(int *supports_tls, int *tls_min);
179
180/* mem.c */
181extern int create_mem_file(unsigned long long len);
182
183/* process.c */
184extern unsigned long os_process_pc(int pid);
185extern int os_process_parent(int pid);
186extern void os_stop_process(int pid);
187extern void os_kill_process(int pid, int reap_child);
188extern void os_kill_ptraced_process(int pid, int reap_child);
189extern long os_ptrace_ldt(long pid, long addr, long data);
190
191extern int os_getpid(void);
192extern int os_getpgrp(void);
193
194extern void init_new_thread_signals(void);
195extern int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr);
196
197extern int os_map_memory(void *virt, int fd, unsigned long long off,
198 unsigned long len, int r, int w, int x);
199extern int os_protect_memory(void *addr, unsigned long len,
200 int r, int w, int x);
201extern int os_unmap_memory(void *addr, int len);
202extern int os_drop_memory(void *addr, int length);
203extern int can_drop_memory(void);
204extern void os_flush_stdout(void);
205
206/* uaccess.c */
207extern unsigned long __do_user_copy(void *to, const void *from, int n,
208 void **fault_addr, jmp_buf **fault_catcher,
209 void (*op)(void *to, const void *from,
210 int n), int *faulted_out);
211
212/* execvp.c */
213extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
214/* helper.c */
215extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
216extern int run_helper_thread(int (*proc)(void *), void *arg,
217 unsigned int flags, unsigned long *stack_out);
218extern int helper_wait(int pid);
219
220
221/* tls.c */
222extern int os_set_thread_area(user_desc_t *info, int pid);
223extern int os_get_thread_area(user_desc_t *info, int pid);
224
225/* umid.c */
226extern int umid_file_name(char *name, char *buf, int len);
227extern int set_umid(char *name);
228extern char *get_umid(void);
229
230/* signal.c */
231extern void timer_init(void);
232extern void set_sigstack(void *sig_stack, int size);
233extern void remove_sigstack(void);
234extern void set_handler(int sig, void (*handler)(int), int flags, ...);
235extern int change_sig(int signal, int on);
236extern void block_signals(void);
237extern void unblock_signals(void);
238extern int get_signals(void);
239extern int set_signals(int enable);
240
241/* util.c */
242extern void stack_protections(unsigned long address);
243extern int raw(int fd);
244extern void setup_machinename(char *machine_out);
245extern void setup_hostinfo(char *buf, int len);
246extern void os_dump_core(void) __attribute__ ((noreturn));
247extern void um_early_printk(const char *s, unsigned int n);
248
249/* time.c */
250extern void idle_sleep(unsigned long long nsecs);
251extern int set_interval(void);
252extern int timer_one_shot(int ticks);
253extern long long disable_timer(void);
254extern void uml_idle_timer(void);
255extern long long os_nsecs(void);
256
257/* skas/mem.c */
258extern long run_syscall_stub(struct mm_id * mm_idp,
259 int syscall, unsigned long *args, long expected,
260 void **addr, int done);
261extern long syscall_stub_data(struct mm_id * mm_idp,
262 unsigned long *data, int data_count,
263 void **addr, void **stub_addr);
264extern int map(struct mm_id * mm_idp, unsigned long virt,
265 unsigned long len, int prot, int phys_fd,
266 unsigned long long offset, int done, void **data);
267extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
268 int done, void **data);
269extern int protect(struct mm_id * mm_idp, unsigned long addr,
270 unsigned long len, unsigned int prot, int done, void **data);
271
272/* skas/process.c */
273extern int is_skas_winch(int pid, int fd, void *data);
274extern int start_userspace(unsigned long stub_stack);
275extern int copy_context_skas0(unsigned long stack, int pid);
276extern void userspace(struct uml_pt_regs *regs);
277extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
278 unsigned long stack);
279extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
280extern void switch_threads(jmp_buf *me, jmp_buf *you);
281extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
282extern void initial_thread_cb_skas(void (*proc)(void *),
283 void *arg);
284extern void halt_skas(void);
285extern void reboot_skas(void);
286
287/* irq.c */
288extern int os_waiting_for_events(struct irq_fd *active_fds);
289extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
290extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
291 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
292extern void os_free_irq_later(struct irq_fd *active_fds,
293 int irq, void *dev_id);
294extern int os_get_pollfd(int i);
295extern void os_set_pollfd(int i, int fd);
296extern void os_set_ioignore(void);
297
298/* sigio.c */
299extern int add_sigio_fd(int fd);
300extern int ignore_sigio_fd(int fd);
301extern void maybe_sigio_broken(int fd, int read);
302extern void sigio_broken(int fd, int read);
303
304/* sys-x86_64/prctl.c */
305extern int os_arch_prctl(int pid, int code, unsigned long *addr);
306
307/* tty.c */
308extern int get_pty(void);
309
310/* sys-$ARCH/task_size.c */
311extern unsigned long os_get_top_address(void);
312
313#endif