um: add a kmsg_dumper

obj-y = config.o exec.o exitcode.o irq.o ksyms.o mem.o \

	physmem.o process.o ptrace.o reboot.o sigio.o \

	signal.o syscall.o sysrq.o time.o tlb.o trap.o \

	um_arch.o umid.o maccess.o skas/

	um_arch.o umid.o maccess.o kmsg_dump.o skas/

obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o

obj-$(CONFIG_GPROF)	+= gprof_syms.o

#include <linux/kmsg_dump.h>

#include <linux/console.h>

#include <shared/init.h>

#include <shared/kern.h>

#include <os.h>

static void kmsg_dumper_stdout(struct kmsg_dumper *dumper,

				enum kmsg_dump_reason reason)

{

	static char line[1024];

	size_t len = 0;

	bool con_available = false;

	/* only dump kmsg when no console is available */

	if (!console_trylock())

		return;

	if (console_drivers != NULL)

		con_available = true;

	console_unlock();

	if (con_available == true)

		return;

	printf("kmsg_dump:\n");

	while (kmsg_dump_get_line(dumper, true, line, sizeof(line), &len)) {

		line[len] = '\0';

		printf("%s", line);

	}

}

static struct kmsg_dumper kmsg_dumper = {

	.dump = kmsg_dumper_stdout

};

int __init kmsg_dumper_stdout_init(void)

{

	return kmsg_dump_register(&kmsg_dumper);

}

__uml_postsetup(kmsg_dumper_stdout_init);

#include <linux/string.h>

#include <linux/utsname.h>

#include <linux/sched.h>

#include <linux/kmsg_dump.h>

#include <asm/pgtable.h>

#include <asm/processor.h>

#include <asm/sections.h>

static int panic_exit(struct notifier_block *self, unsigned long unused1,

		      void *unused2)

{

	kmsg_dump(KMSG_DUMP_PANIC);

	bust_spinlocks(1);

	bust_spinlocks(0);

	uml_exitcode = 1;