1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/kmsg_dump.h> 3 #include <linux/console.h> 4 #include <linux/string.h> 5 #include <shared/init.h> 6 #include <shared/kern.h> 7 #include <os.h> 8 9 static void kmsg_dumper_stdout(struct kmsg_dumper *dumper, 10 enum kmsg_dump_reason reason) 11 { 12 static char line[1024]; 13 struct console *con; 14 size_t len = 0; 15 16 /* only dump kmsg when no console is available */ 17 if (!console_trylock()) 18 return; 19 20 for_each_console(con) { 21 if(strcmp(con->name, "tty") == 0 && 22 (con->flags & (CON_ENABLED | CON_CONSDEV)) != 0) { 23 break; 24 } 25 } 26 27 console_unlock(); 28 29 if (con) 30 return; 31 32 printf("kmsg_dump:\n"); 33 while (kmsg_dump_get_line(dumper, true, line, sizeof(line), &len)) { 34 line[len] = '\0'; 35 printf("%s", line); 36 } 37 } 38 39 static struct kmsg_dumper kmsg_dumper = { 40 .dump = kmsg_dumper_stdout 41 }; 42 43 int __init kmsg_dumper_stdout_init(void) 44 { 45 return kmsg_dump_register(&kmsg_dumper); 46 } 47 48 __uml_postsetup(kmsg_dumper_stdout_init); 49