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kexec jump: check code size in control page

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Kexec/Kexec-jump require code size in control page is less than
PAGE_SIZE/2.  This patch add link-time checking for this.

ASSERT() of ld link script is used as the link-time checking mechanism.

[akpm@linux-foundation.org: build fix]
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Huang Ying
2008-08-15 00:40:23 -07:00
committed by Linus Torvalds
parent 163f6876f5
commit fb45daa69d
4 changed files with 20 additions and 4 deletions
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4
include/asm-x86/kexec.h
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@@ -41,6 +41,10 @@
# define PAGES_NR 17
#endif
#ifdef CONFIG_X86_32
# define KEXEC_CONTROL_CODE_MAX_SIZE 2048
#endif
#ifndef __ASSEMBLY__
#include <linux/string.h>