fix the mremap signature
The mremap definition was incorrect (unsigned long instead of int) and
it was missing the optional new_address parameter.
Change-Id: Ib9d0675aaa098c21617cedc9b2b8cf267be3aec4
diff --git a/libc/bionic/mremap.cpp b/libc/bionic/mremap.cpp
new file mode 100644
index 0000000..4892b1d
--- /dev/null
+++ b/libc/bionic/mremap.cpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/mman.h>
+#include <stdarg.h>
+
+extern "C" void* ___mremap(void*, size_t, size_t, int, void*);
+
+void* mremap(void* old_address, size_t old_size, size_t new_size, int flags, ...) {
+ void* new_address = nullptr;
+ // The optional argument is only valid if the MREMAP_FIXED flag is set,
+ // so we assume it's not present otherwise.
+ if ((flags & MREMAP_FIXED) != 0) {
+ va_list ap;
+ va_start(ap, flags);
+ new_address = va_arg(ap, void*);
+ va_end(ap);
+ }
+ return ___mremap(old_address, old_size, new_size, flags, new_address);
+}