File 0051-linux-user-take-RESERVED_VA-into-account-f... of Package qemu

Overview Repositories Revisions Requests Users Attributes Meta

File 0051-linux-user-take-RESERVED_VA-into-account-for-g2h_va.patch of Package qemu (Revision 46597a0ce55c004a276a308ff90d1251)

Currently displaying revision 46597a0ce55c004a276a308ff90d1251 , Show latest

From 63ad8e6ca106981bc18f2d49cf0bed79a7b2cbfe Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf@suse.de>
Date: Thu, 2 Feb 2012 03:14:18 +0100
Subject: [PATCH] linux-user: take RESERVED_VA into account for g2h_valid()

When running with -R (RESERVED_VA > 0) all guest virtual addresses
are within the [0..RESERVED_VA] range. Reflect this with g2h_valid()
too so we can safely check for boundaries of our guest address space.

This is required to have the /proc/self/maps code not show maps that
aren't accessible from the guest process's point of view.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 cpu-all.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/cpu-all.h b/cpu-all.h
index 5f47ab8..ce3e78f 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -204,7 +204,8 @@ extern unsigned long reserved_va;
 #else
 #define h2g_valid(x) ({ \
     unsigned long __guest = (unsigned long)(x) - GUEST_BASE; \
-    __guest < (1ul << TARGET_VIRT_ADDR_SPACE_BITS); \
+    (__guest < (1ul << TARGET_VIRT_ADDR_SPACE_BITS)) && \
+    (!RESERVED_VA || (__guest < RESERVED_VA)); \
 })
 #endif
 
-- 
1.6.0.2

Places

File 0051-linux-user-take-RESERVED_VA-into-account-for-g2h_va.patch of Package qemu (Revision 46597a0ce55c004a276a308ff90d1251)

Places