diff options
| -rw-r--r-- | sysdeps/unix/sysv/linux/cris/mmap.S | 68 |
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) |