diff options
Diffstat (limited to 'kernel/crash_dump.c')
| -rw-r--r-- | kernel/crash_dump.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c index 5f85690285d4..c766ee54c0b1 100644 --- a/kernel/crash_dump.c +++ b/kernel/crash_dump.c @@ -2,7 +2,7 @@ #include <linux/crash_dump.h> #include <linux/init.h> #include <linux/errno.h> -#include <linux/module.h> +#include <linux/export.h> /* * If we have booted due to a crash, max_pfn will be a very low value. We need @@ -20,8 +20,15 @@ unsigned long saved_max_pfn; unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX; /* + * stores the size of elf header of crash image + */ +unsigned long long elfcorehdr_size; + +/* * 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. + * + * Syntax: elfcorehdr=[size[KMG]@]offset[KMG] */ static int __init setup_elfcorehdr(char *arg) { @@ -29,6 +36,10 @@ static int __init setup_elfcorehdr(char *arg) if (!arg) return -EINVAL; elfcorehdr_addr = memparse(arg, &end); + if (*end == '@') { + elfcorehdr_size = elfcorehdr_addr; + elfcorehdr_addr = memparse(end + 1, &end); + } return end > arg ? 0 : -EINVAL; } early_param("elfcorehdr", setup_elfcorehdr); |