source: mainline/kernel/generic/include/console/console.h@ 9242ad9

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 9242ad9 was 5a5269d, checked in by GitHub <noreply@…>, 6 years ago

Change type of uspace pointers in kernel from pointer type to numeric (#170)

From kernel's perspective, userspace addresses are not valid pointers,
and can only be used in calls to copy_to/from_uspace().
Therefore, we change the type of those arguments and variables to
uspace_addr_t which is an alias for sysarg_t.

This allows the compiler to catch accidental direct accesses to
userspace addresses.

Additionally, to avoid losing the type information in code,
a macro uspace_ptr(type) is used that translates to uspace_addr_t.
I makes no functional difference, but allows keeping the type information
in code in case we implement some sort of static checking for it in the future.

However, ccheck doesn't like that, so instead of using uspace_ptr(char),
we use uspace_ptr_char which is defined as
#define uspace_ptr_char uspace_ptr(char).
  • Property mode set to 100644
File size: 2.6 KB
Line 
1/*
2 * Copyright (c) 2005 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup kernel_generic_console
30 * @{
31 */
32/** @file
33 */
34
35#ifndef KERN_CONSOLE_H_
36#define KERN_CONSOLE_H_
37
38#include <typedefs.h>
39#include <print.h>
40#include <console/chardev.h>
41#include <synch/spinlock.h>
42
43#define PAGING(counter, increment, before, after) \
44 do { \
45 (counter) += (increment); \
46 if ((counter) > 23) { \
47 before; \
48 printf(" -- Press any key to continue -- "); \
49 indev_pop_character(stdin); \
50 after; \
51 printf("\n"); \
52 (counter) = 0; \
53 } \
54 } while (0)
55
56extern indev_t *stdin;
57extern outdev_t *stdout;
58
59extern void early_putwchar(wchar_t);
60
61extern indev_t *stdin_wire(void);
62extern void stdout_wire(outdev_t *outdev);
63extern void console_init(void);
64
65extern void kio_init(void);
66extern void kio_update(void *);
67extern void kio_flush(void);
68extern void kio_push_char(const wchar_t);
69SPINLOCK_EXTERN(kio_lock);
70
71extern wchar_t getc(indev_t *indev);
72extern size_t gets(indev_t *indev, char *buf, size_t buflen);
73extern sys_errno_t sys_kio(int cmd, uspace_addr_t buf, size_t size);
74
75extern void grab_console(void);
76extern void release_console(void);
77
78extern sysarg_t sys_debug_console(void);
79
80#endif /* KERN_CONSOLE_H_ */
81
82/** @}
83 */
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