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[10/10] s390x: s390_cpu_get_phys_page_debug has to return -1

Message ID 1453465413-12846-11-git-send-email-cornelia.huck@de.ibm.com
State New
Headers show

Commit Message

Cornelia Huck Jan. 22, 2016, 12:23 p.m. UTC 
From: David Hildenbrand <dahi@linux.vnet.ibm.com>

If translation fails, we have to return -1. For now, we
would simply return the value last stored to raddr (if any).

This way, reading invalid memory via gdb will return values, although it
shouldn't.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
 target-s390x/helper.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
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Patch

diff --git a/target-s390x/helper.c b/target-s390x/helper.c
index e541d69..1231e58 100644
--- a/target-s390x/helper.c
+++ b/target-s390x/helper.c
@@ -162,8 +162,9 @@  hwaddr s390_cpu_get_phys_page_debug(CPUState *cs, vaddr vaddr)
         vaddr &= 0x7fffffff;
     }
 
-    mmu_translate(env, vaddr, MMU_INST_FETCH, asc, &raddr, &prot, false);
-
+    if (mmu_translate(env, vaddr, MMU_INST_FETCH, asc, &raddr, &prot, false)) {
+        return -1;
+    }
     return raddr;
 }