From 55f280c90ed7288b392fcf718efc2d3caca11e91 Mon Sep 17 00:00:00 2001
From: balrog <balrog@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Tue, 28 Oct 2008 10:24:11 +0000
Subject: [PATCH] page_check_range: fix wrap around test (Lauro Ramos Venancio).
---
exec.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/exec.c b/exec.c
index f1fcec8..697a19e 100644
--- a/exec.c
+++ b/exec.c
@@ -2081,12 +2081,13 @@ int page_check_range(target_ulong start, target_ulong len, int flags)
target_ulong end;
target_ulong addr;
+ if (start + len < start)
+ /* we've wrapped around */
+ return -1;
+
end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */
start = start & TARGET_PAGE_MASK;
- if( end < start )
- /* we've wrapped around */
- return -1;
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
p = page_find(addr >> TARGET_PAGE_BITS);
if( !p )
--
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