i386: Catch all non-present ptes in cpu_get_phys_page_debug (Jan Kiszka)

It helps debugging guests when yet unmapped pages are correctly reported
as, well, unmapped.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5025 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/target-i386/helper.c b/target-i386/helper.c
index 7962d6b..2b59f23 100644 (file)
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -1192,6 +1192,8 @@ target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
             page_size = 4096;
             pte = ldq_phys(pte_addr);
         }
+        if (!(pte & PG_PRESENT_MASK))
+            return -1;
     } else {
         uint32_t pde;