FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/common/linux_oldmmap.c

     /*      $NetBSD: linux_oldmmap.c,v 1.70 2008/06/18 12:24:17 tsutsui Exp $       */
     
     /*-
      * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Frank van der Linden and Eric Haszlakiewicz.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: linux_oldmmap.c,v 1.70 2008/06/18 12:24:17 tsutsui Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/mount.h>
    
    #include <sys/sched.h>
    #include <sys/syscallargs.h>
    
    #include <uvm/uvm_param.h>
    
    #ifdef __amd64__
    #include <compat/netbsd32/netbsd32.h>
    
    #include <compat/linux32/common/linux32_types.h>
    #include <compat/linux32/common/linux32_machdep.h>
    #endif
    
    #include <compat/linux/common/linux_types.h>
    #include <compat/linux/common/linux_mmap.h>
    #include <compat/linux/common/linux_oldmmap.h>
    #include <compat/linux/common/linux_signal.h>
    
    #include <compat/linux/linux_syscallargs.h>
    
    /* Used on: arm, i386, m68k */
    /* Used for linux32 on: amd64 */
    /* Not used on: alpha, mips, pcc, sparc, sparc64 */
    
    #undef DPRINTF
    #ifdef DEBUG_LINUX
    #define DPRINTF(a)      uprintf a
    #else
    #define DPRINTF(a)
    #endif
    
    /*
     * Linux wants to pass everything to a syscall in registers.
     * However mmap() has 6 of them. Oops: out of register error.
     * They just pass everything in a structure.
     */
    int
    linux_sys_old_mmap(struct lwp *l, const struct linux_sys_old_mmap_args *uap, register_t *retval)
    {
            /* {
                    syscallarg(struct linux_oldmmap *) lmp;
            } */
            struct linux_oldmmap lmap;
            struct linux_sys_mmap_args nlmap;
            int error;
    
            if ((error = copyin(SCARG(uap, lmp), &lmap, sizeof lmap)))
                    return error;
    
            if (lmap.lm_offset & PAGE_MASK)
                    return EINVAL;
    
            SCARG(&nlmap,addr) = lmap.lm_addr;
            SCARG(&nlmap,len) = lmap.lm_len;
            SCARG(&nlmap,prot) = lmap.lm_prot;
            SCARG(&nlmap,flags) = lmap.lm_flags;
            SCARG(&nlmap,fd) = lmap.lm_fd;
            SCARG(&nlmap,offset) = lmap.lm_offset;
            DPRINTF(("old_mmap(%#x, %u, %u, %u, %d, %u)\n",
                lmap.lm_addr, lmap.lm_len, lmap.lm_prot, lmap.lm_flags,
                lmap.lm_fd, lmap.lm_offset));
            return linux_sys_mmap(l, &nlmap, retval);
   }
   

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