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-rw-r--r--sysdeps/unix/sysv/linux/cris/mmap.S68
1 files changed, 68 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/cris/mmap.S b/sysdeps/unix/sysv/linux/cris/mmap.S
new file mode 100644
index 0000000000..33030f4ee4
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/cris/mmap.S
@@ -0,0 +1,68 @@
+/* Copyright (C) 1995, 96, 97, 98, 99, 2000, 2001 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <sysdep.h>
+
+#include "kernel-features.h"
+
+#include <asm/errno.h>
+
+/* Rather than dragging in yet another kernel file, <asm/page.h>, we
+ define it here. Provide for easy override. */
+#ifndef PAGE_SHIFT
+#define PAGE_SHIFT 13
+#endif
+
+ .syntax no_register_prefix
+
+/* This is __ptr_t
+ __mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset) */
+
+ ENTRY (__mmap)
+
+ /* Only accept a offset (and address) being a multiple of PAGE_SIZE,
+ since we only pass the page part in the system call. */
+ move.d [sp+4],r9
+ btstq (PAGE_SHIFT - 1),r9
+ bne 1f
+ btstq (PAGE_SHIFT - 1),r10
+
+ bne 1f
+ lsrq PAGE_SHIFT,r9
+
+ move [sp],mof
+ move srp,[sp]
+ move r9,srp
+
+ movu.b SYS_ify (mmap2),r9
+ break 13
+
+ cmps.w -4096,r10
+ bhs 0f
+ move [sp],srp
+
+ Ret
+ nop
+
+/* Local error handler. */
+1:
+ movs.w -EINVAL,r10
+ /* Drop through into the ordinary error handler. */
+PSEUDO_END (__mmap)
+
+weak_alias (__mmap, mmap)