Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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
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 */
41struct 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
56struct 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
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/* file.c */
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/* start_up.c */
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/* mem.c */
180extern int create_mem_file(unsigned long long len);
181
182/* process.c */
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);
194extern int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr);
195
196extern int os_map_memory(void *virt, int fd, unsigned long long off,
197 unsigned long len, int r, int w, int x);
198extern int os_protect_memory(void *addr, unsigned long len,
199 int r, int w, int x);
200extern int os_unmap_memory(void *addr, int len);
201extern int os_drop_memory(void *addr, int length);
202extern int can_drop_memory(void);
203extern void os_flush_stdout(void);
204
205/* execvp.c */
206extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
207/* helper.c */
208extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
209extern int run_helper_thread(int (*proc)(void *), void *arg,
210 unsigned int flags, unsigned long *stack_out);
211extern int helper_wait(int pid);
212
213
214/* umid.c */
215extern int umid_file_name(char *name, char *buf, int len);
216extern int set_umid(char *name);
217extern char *get_umid(void);
218
219/* signal.c */
220extern void timer_init(void);
221extern void set_sigstack(void *sig_stack, int size);
222extern void remove_sigstack(void);
223extern void set_handler(int sig);
224extern int change_sig(int signal, int on);
225extern void block_signals(void);
226extern void unblock_signals(void);
227extern int get_signals(void);
228extern int set_signals(int enable);
229
230/* util.c */
231extern void stack_protections(unsigned long address);
232extern int raw(int fd);
233extern void setup_machinename(char *machine_out);
234extern void setup_hostinfo(char *buf, int len);
235extern void os_dump_core(void) __attribute__ ((noreturn));
236extern void um_early_printk(const char *s, unsigned int n);
237
238/* time.c */
239extern void idle_sleep(unsigned long long nsecs);
240extern int set_interval(void);
241extern int timer_one_shot(int ticks);
242extern long long disable_timer(void);
243extern void uml_idle_timer(void);
244extern long long os_nsecs(void);
245
246/* skas/mem.c */
247extern long run_syscall_stub(struct mm_id * mm_idp,
248 int syscall, unsigned long *args, long expected,
249 void **addr, int done);
250extern long syscall_stub_data(struct mm_id * mm_idp,
251 unsigned long *data, int data_count,
252 void **addr, void **stub_addr);
253extern 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);
256extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
257 int done, void **data);
258extern 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 */
262extern int is_skas_winch(int pid, int fd, void *data);
263extern int start_userspace(unsigned long stub_stack);
264extern int copy_context_skas0(unsigned long stack, int pid);
265extern void userspace(struct uml_pt_regs *regs);
266extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
267 unsigned long stack);
268extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
269extern void switch_threads(jmp_buf *me, jmp_buf *you);
270extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
271extern void initial_thread_cb_skas(void (*proc)(void *),
272 void *arg);
273extern void halt_skas(void);
274extern void reboot_skas(void);
275
276/* irq.c */
277extern int os_waiting_for_events(struct irq_fd *active_fds);
278extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
279extern 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);
281extern void os_free_irq_later(struct irq_fd *active_fds,
282 int irq, void *dev_id);
283extern int os_get_pollfd(int i);
284extern void os_set_pollfd(int i, int fd);
285extern void os_set_ioignore(void);
286
287/* sigio.c */
288extern int add_sigio_fd(int fd);
289extern int ignore_sigio_fd(int fd);
290extern void maybe_sigio_broken(int fd, int read);
291extern void sigio_broken(int fd, int read);
292
293/* sys-x86_64/prctl.c */
294extern int os_arch_prctl(int pid, int code, unsigned long *addr);
295
296/* tty.c */
297extern int get_pty(void);
298
299/* sys-$ARCH/task_size.c */
300extern unsigned long os_get_top_address(void);
301
302#endif