diff -r 2a3111016f88 unmodified_drivers/linux-2.6/platform-pci/Kbuild
--- a/unmodified_drivers/linux-2.6/platform-pci/Kbuild	Mon Feb 11 15:59:49 2008 +0000
+++ b/unmodified_drivers/linux-2.6/platform-pci/Kbuild	Tue Feb 12 16:26:08 2008 +0900
@@ -7,6 +7,7 @@ xen-platform-pci-objs := evtchn.o platfo
 xen-platform-pci-objs := evtchn.o platform-pci.o gnttab.o xen_support.o
 xen-platform-pci-objs += features.o platform-compat.o
 xen-platform-pci-objs += reboot.o machine_reboot.o
+xen-platform-pci-objs += panic-handler.o
 
 xen-platform-pci-objs += ../xenbus/xenbus_comms.o
 xen-platform-pci-objs += ../xenbus/xenbus_xs.o
diff -r 2a3111016f88 unmodified_drivers/linux-2.6/platform-pci/panic-handler.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/unmodified_drivers/linux-2.6/platform-pci/panic-handler.c	Tue Feb 12 16:26:08 2008 +0900
@@ -0,0 +1,54 @@
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/notifier.h>
+#include <asm/hypervisor.h>
+
+MODULE_LICENSE("GPL");
+
+#ifdef __ia64__
+static void
+xen_panic_hypercall(struct unw_frame_info *info, void *arg)
+{
+	current->thread.ksp = (__u64)info->sw - 16;
+	HYPERVISOR_shutdown(SHUTDOWN_crash);
+	/* we're never actually going to get here... */
+}
+#endif
+
+static int
+xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
+{
+#ifdef __ia64__
+	unw_init_running(xen_panic_hypercall, NULL);
+#else /* !__ia64__ */
+	HYPERVISOR_shutdown(SHUTDOWN_crash);
+#endif
+	/* we're never actually going to get here... */
+	return NOTIFY_DONE;
+}
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
+static struct notifier_block xen_panic_block = {
+	xen_panic_event, NULL, 0 /* try to go last */
+};
+#else
+static struct notifier_block xen_panic_block = {
+	.notifier_call= xen_panic_event,
+	.next= NULL,
+	.priority= 0/* try to go last */
+};
+#endif /*LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)*/
+
+static int __init setup_panic_event(void)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
+	notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+#else
+	atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+#endif /*LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)*/
+	return 0;
+}
+
+int xen_panic_handler_init(void)
+{
+	return setup_panic_event();
+}
diff -r 2a3111016f88 unmodified_drivers/linux-2.6/platform-pci/platform-pci.c
--- a/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c	Mon Feb 11 15:59:49 2008 +0000
+++ b/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c	Tue Feb 12 16:26:08 2008 +0900
@@ -249,6 +249,7 @@ int xen_irq_init(struct pci_dev *pdev);
 int xen_irq_init(struct pci_dev *pdev);
 int xenbus_init(void);
 int xen_reboot_init(void);
+int xen_panic_handler_init(void);
 int gnttab_init(void);
 
 static int __devinit platform_pci_init(struct pci_dev *pdev,
@@ -317,6 +318,9 @@ static int __devinit platform_pci_init(s
 	if ((ret = xen_reboot_init()))
 		goto out;
 
+	if ((ret = xen_panic_handler_init()))
+		goto out;
+
  out:
 	if (ret) {
 		release_mem_region(mmio_addr, mmio_len);