As I understand kexec/kdump code is arch dependent, but from your
patch there is no arch specific piece of code, please can you explain
this?
Thanks
Jason Xiao
On Fri, Jul 11, 2008 at 4:57 AM, <quilt@xxxxxxxxxxxxxxxx> wrote:
> Add kdump command to KDB. This command triggers
> a dump of the kernel via the kexec/kdump mechanism.
>
> Author: Jim Houston <jim.houston@xxxxxxxx>
> Signed-off-by: Joe Korty <joe.korty@xxxxxxxx>
>
> Index: 2.6.26-rc9/kdb/modules/Makefile
> ===================================================================
> --- 2.6.26-rc9.orig/kdb/modules/Makefile 2008-07-10 12:14:15.000000000
> -0400
> +++ 2.6.26-rc9/kdb/modules/Makefile 2008-07-10 13:41:59.000000000 -0400
> @@ -6,7 +6,7 @@
> # Copyright (c) 1999-2006 Silicon Graphics, Inc. All Rights Reserved.
> #
>
> -obj-$(CONFIG_KDB_MODULES) += kdbm_pg.o kdbm_task.o kdbm_vm.o kdbm_sched.o
> +obj-$(CONFIG_KDB_MODULES) += kdbm_pg.o kdbm_task.o kdbm_vm.o kdbm_sched.o
> kdbm_kdump.o
> obj-m += kdbm_debugtypes.o
> ifdef CONFIG_X86
> obj-$(CONFIG_KDB_MODULES) += kdbm_x86.o
> Index: 2.6.26-rc9/kdb/modules/kdbm_kdump.c
> ===================================================================
> --- /dev/null 1970-01-01 00:00:00.000000000 +0000
> +++ 2.6.26-rc9/kdb/modules/kdbm_kdump.c 2008-07-10 13:40:59.000000000 -0400
> @@ -0,0 +1,43 @@
> +/*
> + * This file is subject to the terms and conditions of the GNU General Public
> + * License. See the file "COPYING" in the main directory of this archive
> + * for more details.
> + *
> + * Copyright (c) 2006 Concurrent Computer Corp
> + */
> +
> +#include <linux/kdb.h>
> +#include <linux/kdbprivate.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/irq.h>
> +#include <linux/sched.h>
> +#include <linux/kexec.h>
> +
> +
> +MODULE_AUTHOR("Concurrent Computer Corp");
> +MODULE_DESCRIPTION("interface to request kdump crash dump");
> +MODULE_LICENSE("GPL");
> +
> +static int
> +kdbm_kdump(int argc, const char **argv)
> +{
> + kdb_printf("Calling crash_kexec\n");
> + crash_kexec(get_irq_regs());
> + kdb_printf("crash_kexec failed\n");
> + return 0;
> +}
> +
> +static int __init kdbm_kdump_init(void)
> +{
> + kdb_register("kdump", kdbm_kdump, "", "request kdump crash dump", 0);
> + return 0;
> +}
> +
> +static void __exit kdbm_kdump_exit(void)
> +{
> + kdb_unregister("kdump");
> +}
> +
> +module_init(kdbm_kdump_init)
> +module_exit(kdbm_kdump_exit)
> Index: 2.6.26-rc9/kernel/kexec.c
> ===================================================================
> --- 2.6.26-rc9.orig/kernel/kexec.c 2008-07-10 12:12:51.000000000 -0400
> +++ 2.6.26-rc9/kernel/kexec.c 2008-07-10 13:40:59.000000000 -0400
> @@ -19,6 +19,7 @@
> #include <linux/reboot.h>
> #include <linux/ioport.h>
> #include <linux/hardirq.h>
> +#include <linux/module.h>
> #include <linux/elf.h>
> #include <linux/elfcore.h>
> #include <linux/utsrelease.h>
> @@ -1077,6 +1078,7 @@
> BUG_ON(!locked);
> }
> }
> +EXPORT_SYMBOL_GPL(crash_kexec);
>
> static u32 *append_elf_note(u32 *buf, char *name, unsigned type, void *data,
> size_t data_len)
> ---------------------------
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