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kdump: sh: parse elfcorehdr command line argument

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A quick cut and paste from other architectures to allow SH
to parse the elfcorehdr command line argument which is required
for both is_kdump_kernel() and vmcore to function.
(the former is as yet unused on SH).

Tested compilation only

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Simon Horman 2008-07-30 10:29:39 +10:00 committed by Paul Mundt
parent 623fa579e6
commit daf423db3b
1 changed files with 20 additions and 0 deletions
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20
arch/sh/kernel/setup.c
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@ -25,6 +25,7 @@
#include <linux/smp.h> #include <linux/smp.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/debugfs.h> #include <linux/debugfs.h>
#include <linux/crash_dump.h>
#include <asm/uaccess.h> #include <asm/uaccess.h>
#include <asm/io.h> #include <asm/io.h>
#include <asm/page.h> #include <asm/page.h>
@ -286,6 +287,25 @@ static void __init setup_memory(void)
extern void __init setup_memory(void); extern void __init setup_memory(void);
#endif #endif
/*
* Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
* is_kdump_kernel() to determine if we are booting after a panic. Hence
* ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
*/
#ifdef CONFIG_CRASH_DUMP
/* elfcorehdr= specifies the location of elf core header
* stored by the crashed kernel.
*/
static int __init parse_elfcorehdr(char *arg)
{
if (!arg)
return -EINVAL;
elfcorehdr_addr = memparse(arg, &arg);
return 0;
}
early_param("elfcorehdr", parse_elfcorehdr);
#endif
void __init setup_arch(char **cmdline_p) void __init setup_arch(char **cmdline_p)
{ {
enable_mmu(); enable_mmu();