[Qemu-devel] [PATCH 4/4] fix 0 sized write syscall

[Riku Voipio]

From: Riku Voipio <address@hidden>

fixes running ldconfig under qemu linux-user

Signed-off-by: Riku Voipio <address@hidden>
Cc: Richard Henderson <address@hidden>
Cc: address@hidden
---
 exec.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/exec.c b/exec.c
index 14767b7..c834be2 100644
--- a/exec.c
+++ b/exec.c
@@ -2409,8 +2409,11 @@ int page_check_range(target_ulong start, target_ulong 
len, int flags)
 #if TARGET_ABI_BITS > L1_MAP_ADDR_SPACE_BITS
     assert(start < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS));
 #endif
+    if (len == 0) {
+        return 0;
+    }
 
-    if (start + len - 1 < start) {
+    if (start + len < start) {
         /* We've wrapped around.  */
         return -1;
     }
-- 
1.6.5