diff options
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 | ||||
| -rw-r--r-- | arch/i386/kernel/setup.c | 8 | ||||
| -rw-r--r-- | include/linux/crash_dump.h | 1 | ||||
| -rw-r--r-- | kernel/crash_dump.c | 3 |
4 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 560ff5ae3fd..f44bb5567c5 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -451,6 +451,10 @@ running once the system is up. Format: {"as"|"cfq"|"deadline"|"noop"} See Documentation/block/as-iosched.txt and Documentation/block/deadline-iosched.txt for details. + elfcorehdr= [IA-32] + Specifies physical address of start of kernel core image + elf header. + See Documentation/kdump.txt for details. enforcing [SELINUX] Set initial enforcing status. Format: {"0" | "1"} diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c index 8d58a053e12..7306353c520 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. diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h index 7d983b81742..3f25fd1eaa4 100644 --- a/include/linux/crash_dump.h +++ b/include/linux/crash_dump.h @@ -7,6 +7,7 @@ #include <linux/device.h> #include <linux/proc_fs.h> +extern unsigned long long elfcorehdr_addr; extern ssize_t copy_oldmem_page(unsigned long, char *, size_t, unsigned long, int); #endif /* CONFIG_CRASH_DUMP */ diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c index 5a1e6d5d203..10b966c3744 100644 --- a/kernel/crash_dump.c +++ b/kernel/crash_dump.c @@ -15,6 +15,9 @@ #include <asm/io.h> #include <asm/uaccess.h> +/* Stores the physical address of elf header of crash image. */ +unsigned long long elfcorehdr_addr; + /* * Copy a page from "oldmem". For this page, there is no pte mapped * in the current kernel. We stitch up a pte, similar to kmap_atomic. |