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 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __OS_H__
7#define __OS_H__
8
9#include "uml-config.h"
10#include "asm/types.h"
11#include "../os/include/file.h"
12#include "sysdep/ptrace.h"
13#include "kern_util.h"
14#include "skas/mm_id.h"
15#include "irq_user.h"
16#include "sysdep/tls.h"
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/*
34 * types taken from stat_file() in hostfs_user.c
35 * (if they are wrong here, they are wrong there...).
36 */
37struct uml_stat {
38 int ust_dev; /* device */
39 unsigned long long ust_ino; /* inode */
40 int ust_mode; /* protection */
41 int ust_nlink; /* number of hard links */
42 int ust_uid; /* user ID of owner */
43 int ust_gid; /* group ID of owner */
44 unsigned long long ust_size; /* total size, in bytes */
45 int ust_blksize; /* blocksize for filesystem I/O */
46 unsigned long long ust_blocks; /* number of blocks allocated */
47 unsigned long ust_atime; /* time of last access */
48 unsigned long ust_mtime; /* time of last modification */
49 unsigned long ust_ctime; /* time of last change */
50};
51
52struct openflags {
53 unsigned int r : 1;
54 unsigned int w : 1;
55 unsigned int s : 1; /* O_SYNC */
56 unsigned int c : 1; /* O_CREAT */
57 unsigned int t : 1; /* O_TRUNC */
58 unsigned int a : 1; /* O_APPEND */
59 unsigned int e : 1; /* O_EXCL */
60 unsigned int cl : 1; /* FD_CLOEXEC */
61};
62
63#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
64 .t = 0, .a = 0, .e = 0, .cl = 0 })
65
66static inline struct openflags of_read(struct openflags flags)
67{
68 flags.r = 1;
69 return(flags);
70}
71
72static inline struct openflags of_write(struct openflags flags)
73{
74 flags.w = 1;
75 return(flags);
76}
77
78static inline struct openflags of_rdwr(struct openflags flags)
79{
80 return(of_read(of_write(flags)));
81}
82
83static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
84{
85 flags.r = r;
86 flags.w = w;
87 return(flags);
88}
89
90static inline struct openflags of_sync(struct openflags flags)
91{
92 flags.s = 1;
93 return(flags);
94}
95
96static inline struct openflags of_create(struct openflags flags)
97{
98 flags.c = 1;
99 return(flags);
100}
101
102static inline struct openflags of_trunc(struct openflags flags)
103{
104 flags.t = 1;
105 return(flags);
106}
107
108static inline struct openflags of_append(struct openflags flags)
109{
110 flags.a = 1;
111 return(flags);
112}
113
114static inline struct openflags of_excl(struct openflags flags)
115{
116 flags.e = 1;
117 return(flags);
118}
119
120static inline struct openflags of_cloexec(struct openflags flags)
121{
122 flags.cl = 1;
123 return(flags);
124}
125
126/* file.c */
127extern int os_stat_file(const char *file_name, struct uml_stat *buf);
128extern int os_stat_fd(const int fd, struct uml_stat *buf);
129extern int os_access(const char *file, int mode);
130extern void os_print_error(int error, const char* str);
131extern int os_get_exec_close(int fd, int *close_on_exec);
132extern int os_set_exec_close(int fd, int close_on_exec);
133extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
134extern int os_window_size(int fd, int *rows, int *cols);
135extern int os_new_tty_pgrp(int fd, int pid);
136extern int os_get_ifname(int fd, char *namebuf);
137extern int os_set_slip(int fd);
138extern int os_set_owner(int fd, int pid);
139extern int os_sigio_async(int master, int slave);
140extern int os_mode_fd(int fd, int mode);
141
142extern int os_seek_file(int fd, __u64 offset);
143extern int os_open_file(char *file, struct openflags flags, int mode);
144extern int os_read_file(int fd, void *buf, int len);
145extern int os_write_file(int fd, const void *buf, int count);
146extern int os_file_size(char *file, unsigned long long *size_out);
147extern int os_file_modtime(char *file, unsigned long *modtime);
148extern int os_pipe(int *fd, int stream, int close_on_exec);
149extern int os_set_fd_async(int fd, int owner);
150extern int os_clear_fd_async(int fd);
151extern int os_set_fd_block(int fd, int blocking);
152extern int os_accept_connection(int fd);
153extern int os_create_unix_socket(char *file, int len, int close_on_exec);
154extern int os_shutdown_socket(int fd, int r, int w);
155extern void os_close_file(int fd);
156extern int os_rcv_fd(int fd, int *helper_pid_out);
157extern int create_unix_socket(char *file, int len, int close_on_exec);
158extern int os_connect_socket(char *name);
159extern int os_file_type(char *file);
160extern int os_file_mode(char *file, struct openflags *mode_out);
161extern int os_lock_file(int fd, int excl);
162extern void os_flush_stdout(void);
163extern int os_stat_filesystem(char *path, long *bsize_out,
164 long long *blocks_out, long long *bfree_out,
165 long long *bavail_out, long long *files_out,
166 long long *ffree_out, void *fsid_out,
167 int fsid_size, long *namelen_out,
168 long *spare_out);
169extern int os_change_dir(char *dir);
170extern int os_fchange_dir(int fd);
171
172/* start_up.c */
173extern void os_early_checks(void);
174extern int can_do_skas(void);
175extern void os_check_bugs(void);
176extern void check_host_supports_tls(int *supports_tls, int *tls_min);
177
178/* Make sure they are clear when running in TT mode. Required by
179 * SEGV_MAYBE_FIXABLE */
180#ifdef UML_CONFIG_MODE_SKAS
181#define clear_can_do_skas() do { ptrace_faultinfo = proc_mm = 0; } while (0)
182#else
183#define clear_can_do_skas() do {} while (0)
184#endif
185
186/* mem.c */
187extern int create_mem_file(unsigned long long len);
188
189/* process.c */
190extern unsigned long os_process_pc(int pid);
191extern int os_process_parent(int pid);
192extern void os_stop_process(int pid);
193extern void os_kill_process(int pid, int reap_child);
194extern void os_kill_ptraced_process(int pid, int reap_child);
195extern void os_usr1_process(int pid);
196extern long os_ptrace_ldt(long pid, long addr, long data);
197
198extern int os_getpid(void);
199extern int os_getpgrp(void);
200
201extern void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int));
202extern void init_new_thread_signals(int altstack);
203extern int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr);
204
205extern int os_map_memory(void *virt, int fd, unsigned long long off,
206 unsigned long len, int r, int w, int x);
207extern int os_protect_memory(void *addr, unsigned long len,
208 int r, int w, int x);
209extern int os_unmap_memory(void *addr, int len);
210extern int os_drop_memory(void *addr, int length);
211extern int can_drop_memory(void);
212extern void os_flush_stdout(void);
213
214/* tt.c
215 * for tt mode only (will be deleted in future...)
216 */
217extern void forward_ipi(int fd, int pid);
218extern void kill_child_dead(int pid);
219extern void stop(void);
220extern int wait_for_stop(int pid, int sig, int cont_type, void *relay);
221extern int protect_memory(unsigned long addr, unsigned long len,
222 int r, int w, int x, int must_succeed);
223extern void forward_pending_sigio(int target);
224extern int start_fork_tramp(void *arg, unsigned long temp_stack,
225 int clone_flags, int (*tramp)(void *));
226
227/* uaccess.c */
228extern unsigned long __do_user_copy(void *to, const void *from, int n,
229 void **fault_addr, void **fault_catcher,
230 void (*op)(void *to, const void *from,
231 int n), int *faulted_out);
232
233/* helper.c */
234extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
235 unsigned long *stack_out);
236extern int run_helper_thread(int (*proc)(void *), void *arg,
237 unsigned int flags, unsigned long *stack_out,
238 int stack_order);
239extern int helper_wait(int pid);
240
241
242/* tls.c */
243extern int os_set_thread_area(user_desc_t *info, int pid);
244extern int os_get_thread_area(user_desc_t *info, int pid);
245
246/* umid.c */
247extern int umid_file_name(char *name, char *buf, int len);
248extern int set_umid(char *name);
249extern char *get_umid(void);
250
251/* signal.c */
252extern void set_sigstack(void *sig_stack, int size);
253extern void remove_sigstack(void);
254extern void set_handler(int sig, void (*handler)(int), int flags, ...);
255extern int change_sig(int signal, int on);
256extern void block_signals(void);
257extern void unblock_signals(void);
258extern int get_signals(void);
259extern int set_signals(int enable);
260extern void os_usr1_signal(int on);
261
262/* trap.c */
263extern void os_fill_handlinfo(struct kern_handlers h);
264extern void do_longjmp(void *p, int val);
265
266/* util.c */
267extern void stack_protections(unsigned long address);
268extern void task_protections(unsigned long address);
269extern int raw(int fd);
270extern void setup_machinename(char *machine_out);
271extern void setup_hostinfo(void);
272extern int setjmp_wrapper(void (*proc)(void *, void *), ...);
273
274/* time.c */
275#define BILLION (1000 * 1000 * 1000)
276
277extern void switch_timers(int to_real);
278extern void idle_sleep(int secs);
279extern void enable_timer(void);
280extern void disable_timer(void);
281extern void user_time_init(void);
282extern void uml_idle_timer(void);
283extern unsigned long long os_nsecs(void);
284
285/* skas/mem.c */
286extern long run_syscall_stub(struct mm_id * mm_idp,
287 int syscall, unsigned long *args, long expected,
288 void **addr, int done);
289extern long syscall_stub_data(struct mm_id * mm_idp,
290 unsigned long *data, int data_count,
291 void **addr, void **stub_addr);
292extern int map(struct mm_id * mm_idp, unsigned long virt,
293 unsigned long len, int r, int w, int x, int phys_fd,
294 unsigned long long offset, int done, void **data);
295extern int unmap(struct mm_id * mm_idp, void *addr, unsigned long len,
296 int done, void **data);
297extern int protect(struct mm_id * mm_idp, unsigned long addr,
298 unsigned long len, int r, int w, int x, int done,
299 void **data);
300
301/* skas/process.c */
302extern int is_skas_winch(int pid, int fd, void *data);
303extern int start_userspace(unsigned long stub_stack);
304extern int copy_context_skas0(unsigned long stack, int pid);
305extern void userspace(union uml_pt_regs *regs);
306extern void map_stub_pages(int fd, unsigned long code,
307 unsigned long data, unsigned long stack);
308extern void new_thread(void *stack, void **switch_buf_ptr,
309 void **fork_buf_ptr, void (*handler)(int));
310extern void thread_wait(void *sw, void *fb);
311extern void switch_threads(void *me, void *next);
312extern int start_idle_thread(void *stack, void *switch_buf_ptr,
313 void **fork_buf_ptr);
314extern void initial_thread_cb_skas(void (*proc)(void *),
315 void *arg);
316extern void halt_skas(void);
317extern void reboot_skas(void);
318
319/* irq.c */
320extern int os_waiting_for_events(struct irq_fd *active_fds);
321extern int os_isatty(int fd);
322extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
323extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
324 struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
325extern void os_free_irq_later(struct irq_fd *active_fds,
326 int irq, void *dev_id);
327extern int os_get_pollfd(int i);
328extern void os_set_pollfd(int i, int fd);
329extern void os_set_ioignore(void);
330extern void init_irq_signals(int on_sigstack);
331
332/* sigio.c */
333extern void write_sigio_workaround(void);
334extern int add_sigio_fd(int fd, int read);
335extern int ignore_sigio_fd(int fd);
336
337/* skas/trap */
338extern void sig_handler_common_skas(int sig, void *sc_ptr);
339extern void user_signal(int sig, union uml_pt_regs *regs, int pid);
340
341#endif