Commit aac04b32 authored by Vivek Goyal's avatar Vivek Goyal Committed by Linus Torvalds
Browse files

[PATCH] kdump: x86_64: add elfcorehdr command line option 



- elfcorehdr= specifies the location of elf core header stored by the
  crashed kernel.  This command line option will be passed by the kexec-tools
  to capture kernel.

Changes in this version :

- Added more comments in kernel-parameters.txt and in code.

Signed-off-by: default avatarMurali M Chakravarthy <muralim@in.ibm.com>
Signed-off-by: default avatarVivek Goyal <vgoyal@in.ibm.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 69cda7b1

Documentation/kernel-parameters.txt

+4 −3
Original line number Diff line number Diff line
@@ -475,10 +475,11 @@ running once the system is up. 
			See Documentation/block/as-iosched.txt and

			Documentation/block/deadline-iosched.txt for details.



	elfcorehdr=	[IA-32]

	elfcorehdr=	[IA-32, X86_64]

			Specifies physical address of start of kernel core

			image elf header.

			See Documentation/kdump.txt for details.

			image elf header. Generally kexec loader will

			pass this option to capture kernel.

			See Documentation/kdump/kdump.txt for details.



	enforcing	[SELINUX] Set initial enforcing status.

			Format: {"0" | "1"}

arch/i386/kernel/setup.c

+1 −1
Original line number Diff line number Diff line
@@ -898,7 +898,7 @@ static void __init parse_cmdline_early (char ** cmdline_p) 
			}

		}

#endif

#ifdef CONFIG_CRASH_DUMP

#ifdef CONFIG_PROC_VMCORE

		/* elfcorehdr= specifies the location of elf core header

		 * stored by the crashed kernel.

		 */

arch/x86_64/kernel/setup.c

+9 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ 
#include <asm/processor.h>

#include <linux/console.h>

#include <linux/seq_file.h>

#include <linux/crash_dump.h>

#include <linux/root_dev.h>

#include <linux/pci.h>

#include <linux/acpi.h>
@@ -418,6 +419,14 @@ static __init void parse_cmdline_early (char ** cmdline_p) 
		}

#endif



#ifdef CONFIG_PROC_VMCORE

		/* elfcorehdr= specifies the location of elf core header

		 * stored by the crashed kernel. This option will be passed

		 * by kexec loader to the capture kernel.

		 */

		else if(!memcmp(from, "elfcorehdr=", 11))

			elfcorehdr_addr = memparse(from+11, &from);

#endif

	next_char:

		c = *(from++);

		if (!c)

CRA Git | Maintained and supported by SUSTech CRA and CCSE