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 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 35 static struct kmsg_dumper kmsg_dumper = { 36 .dump = kmsg_dumper_stdout 37 }; 38 39 int __init kmsg_dumper_stdout_init(void) 40 { 41 return kmsg_dump_register(&kmsg_dumper); 42 } 43 44 __uml_postsetup(kmsg_dumper_stdout_init); 45