1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/kmsg_dump.h>
 3#include <linux/console.h>
 4#include <shared/init.h>
 5#include <shared/kern.h>
 6#include <os.h>
 7
 8static void kmsg_dumper_stdout(struct kmsg_dumper *dumper,
 9				enum kmsg_dump_reason reason)
10{
11	static char line[1024];
12
13	size_t len = 0;
14	bool con_available = false;
15
16	/* only dump kmsg when no console is available */
17	if (!console_trylock())
18		return;
19
20	if (console_drivers != NULL)
21		con_available = true;
22
23	console_unlock();
24
25	if (con_available == true)
26		return;
27
28	printf("kmsg_dump:\n");
29	while (kmsg_dump_get_line(dumper, true, line, sizeof(line), &len)) {
30		line[len] = '\0';
31		printf("%s", line);
32	}
33}
34
35static struct kmsg_dumper kmsg_dumper = {
36	.dump = kmsg_dumper_stdout
37};
38
39int __init kmsg_dumper_stdout_init(void)
40{
41	return kmsg_dump_register(&kmsg_dumper);
42}
43
44__uml_postsetup(kmsg_dumper_stdout_init);