[PATCH] Retrieve elfcorehdr address from command line

This patch adds support for retrieving the address of elf core header if one
is passed in command line.

Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index 8d58a053e12e..7306353c520e 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -44,6 +44,7 @@
 #include <linux/edd.h>
 #include <linux/nodemask.h>
 #include <linux/kexec.h>
+#include <linux/crash_dump.h>
 
 #include <video/edid.h>
 
@@ -881,6 +882,13 @@ static void __init parse_cmdline_early (char ** cmdline_p)
                         }
                 }
 #endif
+#ifdef CONFIG_CRASH_DUMP
+                /* elfcorehdr= specifies the location of elf core header
+                 * stored by the crashed kernel.
+                 */
+                else if (!memcmp(from, "elfcorehdr=", 11))
+                        elfcorehdr_addr = memparse(from+11, &from);
+#endif
 
                 /*
                  * highmem=size forces highmem to be exactly 'size' bytes.