From: Keir Fraser <keir@xensource.com>
Date: Fri, 21 Sep 2007 16:23:35 +0000 (+0100)
Subject: libxc: improve error message when starting a domain and mmap() fails
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14937^2~43
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success//%22http:/www.example.com/cgi/success/?a=commitdiff_plain;h=807d262e0ad1c2309d8a20087a2ccdaa56de1dc4;p=xen.git

libxc: improve error message when starting a domain and mmap() fails
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
---

diff --git a/tools/libxc/xc_dom_boot.c b/tools/libxc/xc_dom_boot.c
index a9d6b5a9a5..e26941f737 100644
--- a/tools/libxc/xc_dom_boot.c
+++ b/tools/libxc/xc_dom_boot.c
@@ -152,6 +152,7 @@ void *xc_dom_boot_domU_map(struct xc_dom_image *dom, xen_pfn_t pfn,
     privcmd_mmap_entry_t *entries;
     void *ptr;
     int i, rc;
+    int err;
 
     entries = xc_dom_malloc(dom, count * sizeof(privcmd_mmap_entry_t));
     if ( entries == NULL )
@@ -166,9 +167,11 @@ void *xc_dom_boot_domU_map(struct xc_dom_image *dom, xen_pfn_t pfn,
                MAP_SHARED, dom->guest_xc, 0);
     if ( ptr == MAP_FAILED )
     {
+        err = errno;
         xc_dom_panic(XC_INTERNAL_ERROR,
                      "%s: failed to mmap domU pages 0x%" PRIpfn "+0x%" PRIpfn
-                     " [mmap]\n", __FUNCTION__, pfn, count);
+                     " [mmap, errno=%i (%s)]\n", __FUNCTION__, pfn, count,
+                     err, strerror(err));
         return NULL;
     }