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 8 static void kmsg_dumper_stdout(struct kmsg_dumper *dumper, 9 enum kmsg_dump_reason reason) 10 { 11 static char line[1024]; 12 struct console *con; 13 size_t len = 0; 14 15 /* only dump kmsg when no console is available */ 16 if (!console_trylock()) 17 return; 18 19 for_each_console(con) 20 break; 21 22 console_unlock(); 23 24 if (con) 25 return; 26 27 printf("kmsg_dump:\n"); 28 while (kmsg_dump_get_line(dumper, true, line, sizeof(line), &len)) { 29 line[len] = '\0'; 30 printf("%s", line); 31 } 32 } 33 34 static struct kmsg_dumper kmsg_dumper = { 35 .dump = kmsg_dumper_stdout 36 }; 37 38 int __init kmsg_dumper_stdout_init(void) 39 { 40 return kmsg_dump_register(&kmsg_dumper); 41 } 42 43 __uml_postsetup(kmsg_dumper_stdout_init); 44