jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <Kernel/KSyms.h>
8#include <Kernel/Process.h>
9#include <Kernel/UserOrKernelBuffer.h>
10#include <Kernel/kstdio.h>
11
12namespace Kernel {
13
14ErrorOr<FlatPtr> Process::sys$dump_backtrace()
15{
16 VERIFY_NO_PROCESS_BIG_LOCK(this);
17 dump_backtrace();
18 return 0;
19}
20
21ErrorOr<FlatPtr> Process::sys$dbgputstr(Userspace<char const*> characters, size_t size)
22{
23 VERIFY_NO_PROCESS_BIG_LOCK(this);
24 if (size == 0)
25 return 0;
26
27 if (size <= 1024) {
28 char buffer[1024];
29 TRY(copy_from_user(buffer, characters, size));
30 dbgputstr(buffer, size);
31 return size;
32 }
33
34 auto string = TRY(try_copy_kstring_from_user(characters, size));
35 dbgputstr(string->view());
36 return string->length();
37}
38
39}