1 files changed, 52 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/mmap.c b/sysdeps/unix/sysv/linux/mmap.c
new file mode 100644
index 0000000000..da6ab2ef42
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mmap.c
@@ -0,0 +1,52 @@
+/* mmap - map files or devices into memory.  Linux version.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sysdep.h>
+#include <stdint.h>
+
+#ifndef __OFF_T_MATCHES_OFF64_T
+# include <mmap_internal.h>
+
+/* An architecture may override this.  */
+# ifndef MMAP_ADJUST_OFFSET
+#  define MMAP_ADJUST_OFFSET(offset) offset
+# endif
+
+void *
+__mmap (void *addr, size_t len, int prot, int flags, int fd, off_t offset)
+{
+  MMAP_CHECK_PAGE_UNIT ();
+
+  if (offset & MMAP_OFF_LOW_MASK)
+    return (void *) INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
+
+#ifdef __NR_mmap2
+  return (void *) MMAP_CALL (mmap2, addr, len, prot, flags, fd,
+			     offset / (uint32_t) MMAP2_PAGE_UNIT);
+#else
+  return (void *) MMAP_CALL (mmap, addr, len, prot, flags, fd,
+			     MMAP_ADJUST_OFFSET (offset));
+#endif
+}
+weak_alias (__mmap, mmap)
+libc_hidden_def (__mmap)
+
+#endif /* __OFF_T_MATCHES_OFF64_T  */