Avoid sign extension in 32-bit mmap.

Change-Id: I2a77925f62f381a0b34648c3db8154a55dd80c46

diff --git a/libc/bionic/mmap.cpp b/libc/bionic/mmap.cpp
index 75bea58..84a0f76 100644 (file)
--- a/libc/bionic/mmap.cpp
+++ b/libc/bionic/mmap.cpp
@@ -55,5 +55,5 @@ void* mmap64(void* addr, size_t size, int prot, int flags, int fd, off64_t offse
 }
 
 void* mmap(void* addr, size_t size, int prot, int flags, int fd, off_t offset) {
-  return mmap64(addr, size, prot, flags, fd, static_cast<off64_t>(offset));
+  return mmap64(addr, size, prot, flags, fd, static_cast<off64_t>(offset) & 0xffffffff);
 }