From: David Vrabel <david.vrabel@citrix.com>
Date: Tue, 12 Nov 2013 10:47:26 +0000 (+0100)
Subject: x86: check kexec relocation code fits in a page
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~5989
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=1fab023d3f58ed2b40c90c0d9cd078c3afcbcfc7;p=xen.git

x86: check kexec relocation code fits in a page

The kexec relocation (control) code must fit in a single page so add a
link time check for this.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Don Slutz <dslutz@verizon.com>
Tested-by: Don Slutz <dslutz@verizon.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Tested-by: Daniel Kiper <daniel.kiper@oracle.com>
Acked-by: Keir Fraser <keir@xen.org>
---

diff --git a/xen/arch/x86/xen.lds.S b/xen/arch/x86/xen.lds.S
index 9600cdf19e..17db361dda 100644
--- a/xen/arch/x86/xen.lds.S
+++ b/xen/arch/x86/xen.lds.S
@@ -198,3 +198,5 @@ SECTIONS
   .stab.indexstr 0 : { *(.stab.indexstr) }
   .comment 0 : { *(.comment) }
 }
+
+ASSERT(kexec_reloc_size - kexec_reloc <= PAGE_SIZE, "kexec_reloc is too large")