o 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 :
o Added more comments in kernel-parameters.txt and in code.
Signed-off-by:Murali M Chakravarthy <[email protected]>
Signed-off-by: Vivek Goyal <[email protected]>
---
linux-2.6.15-rc1-1M-dynamic-root/Documentation/kernel-parameters.txt | 7 ++++---
linux-2.6.15-rc1-1M-dynamic-root/arch/x86_64/kernel/setup.c | 9 +++++++++
2 files changed, 13 insertions(+), 3 deletions(-)
diff -puN arch/x86_64/kernel/setup.c~x86_64-elfcorehdr-command-line-option arch/x86_64/kernel/setup.c
--- linux-2.6.15-rc1-1M-dynamic/arch/x86_64/kernel/setup.c~x86_64-elfcorehdr-command-line-option 2005-11-17 11:11:07.000000000 +0530
+++ linux-2.6.15-rc1-1M-dynamic-root/arch/x86_64/kernel/setup.c 2005-11-17 11:11:07.000000000 +0530
@@ -42,6 +42,7 @@
#include <linux/edd.h>
#include <linux/mmzone.h>
#include <linux/kexec.h>
+#include <linux/crash_dump.h>
#include <asm/mtrr.h>
#include <asm/uaccess.h>
@@ -417,6 +418,14 @@ static __init void parse_cmdline_early (
}
#endif
+#ifdef CONFIG_CRASH_DUMP
+ /* 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)
diff -puN Documentation/kernel-parameters.txt~x86_64-elfcorehdr-command-line-option Documentation/kernel-parameters.txt
--- linux-2.6.15-rc1-1M-dynamic/Documentation/kernel-parameters.txt~x86_64-elfcorehdr-command-line-option 2005-11-17 11:11:07.000000000 +0530
+++ linux-2.6.15-rc1-1M-dynamic-root/Documentation/kernel-parameters.txt 2005-11-17 11:11:07.000000000 +0530
@@ -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"}
_
-
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