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Diffstat (limited to 'sysdeps/mach/hurd/mmap64.c')
-rw-r--r--sysdeps/mach/hurd/mmap64.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/mmap64.c b/sysdeps/mach/hurd/mmap64.c
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+++ b/sysdeps/mach/hurd/mmap64.c
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+/* Copyright (C) 1997-2015 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 <sys/mman.h>
+#include <sys/types.h>
+
+/* Map addresses starting near ADDR and extending for LEN bytes. From
+ OFFSET into the file FD describes according to PROT and FLAGS. If ADDR
+ is nonzero, it is the desired mapping address. If the MAP_FIXED bit is
+ set in FLAGS, the mapping will be at ADDR exactly (which must be
+ page-aligned); otherwise the system chooses a convenient nearby address.
+ The return value is the actual mapping address chosen or MAP_FAILED
+ for errors (in which case `errno' is set). A successful `mmap' call
+ deallocates any previous mapping for the affected region. */
+
+__ptr_t
+__mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd,
+ __off64_t offset)
+{
+ vm_offset_t small_offset = (vm_offset_t) offset;
+
+ if (small_offset != offset)
+ {
+ /* We cannot do this since the offset is too large. */
+ __set_errno (EOVERFLOW);
+ return MAP_FAILED;
+ }
+
+ return __mmap (addr, len, prot, flags, fd, small_offset);
+}
+
+weak_alias (__mmap64, mmap64)