Fix zero-length write(2).

Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-03-29 10:54:42 -07:00 · 2010-03-29 10:54:42 -07:00 · 3e0650a9c9
parent c581deda32
commit 3e0650a9c9
1 changed files with 3 additions and 0 deletions
--- a/exec.c
+++ b/exec.c
@ -2429,6 +2429,9 @@ int page_check_range(target_ulong start, target_ulong len, int flags)
    assert(start < ((abi_ulong)1 << L1_MAP_ADDR_SPACE_BITS));
 #endif

+    if (len == 0) {
+        return 0;
+    }
    if (start + len - 1 < start) {
        /* We've wrapped around.  */
        return -1;