[Crash-utility] [PATCH] Add xen_phys_start value in the crash info note

[Itsuro ODA]

Hi,

This patch makes the vmcore utilities (ex. crash, makedumpfile) be
able to get the relocation address of the xen hypervisor from a vmcore. 
It is necessary for the utilities to find the data of the hypervisor 
structures.

Note that this patch does not raise any comptibility issue for the
utilities (which I know) nor the other components of xen.

Signed-off-by: Itsuro Oda <oda at valinux.co.jp>

diff -r f681c4de91fc xen/arch/x86/crash.c
--- a/xen/arch/x86/crash.c	Wed May 28 16:14:10 2008 +0100
+++ b/xen/arch/x86/crash.c	Fri May 30 08:40:50 2008 +0900
@@ -102,6 +102,7 @@ void machine_crash_shutdown(void)
     hvm_cpu_down();
 
     info = kexec_crash_save_info();
+    info->xen_phys_start = xen_phys_start;
     info->dom0_pfn_to_mfn_frame_list_list =
         arch_get_pfn_to_mfn_frame_list_list(dom0);
 }
diff -r f681c4de91fc xen/include/xen/elfcore.h
--- a/xen/include/xen/elfcore.h	Wed May 28 16:14:10 2008 +0100
+++ b/xen/include/xen/elfcore.h	Fri May 30 08:39:40 2008 +0900
@@ -66,6 +66,7 @@ typedef struct {
     unsigned long xen_compile_time;
     unsigned long tainted;
 #if defined(__i386__) || defined(__x86_64__)
+    unsigned long xen_phys_start;
     unsigned long dom0_pfn_to_mfn_frame_list_list;
 #endif
 #if defined(__ia64__)

-- 
Itsuro ODA <oda at valinux.co.jp>