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linux_oldmmap.c revision 1.66.18.1 
      1 /*	$NetBSD: linux_oldmmap.c,v 1.66.18.1 2007/12/09 19:37:03 jmcneill Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Frank van der Linden and Eric Haszlakiewicz.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: linux_oldmmap.c,v 1.66.18.1 2007/12/09 19:37:03 jmcneill Exp $");
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/mount.h>
     45 
     46 #include <sys/syscallargs.h>
     47 
     48 #include <uvm/uvm_param.h>
     49 
     50 #ifdef __amd64__
     51 #include <compat/netbsd32/netbsd32.h>
     52 
     53 #include <compat/linux32/common/linux32_types.h>
     54 #include <compat/linux32/common/linux32_machdep.h>
     55 #endif
     56 
     57 #include <compat/linux/common/linux_types.h>
     58 #include <compat/linux/common/linux_mmap.h>
     59 #include <compat/linux/common/linux_oldmmap.h>
     60 #include <compat/linux/common/linux_signal.h>
     61 
     62 #include <compat/linux/linux_syscallargs.h>
     63 
     64 /* Used on: arm, i386, m68k */
     65 /* Used for linux32 on: amd64 */
     66 /* Not used on: alpha, mips, pcc, sparc, sparc64 */
     67 
     68 #undef DPRINTF
     69 #ifdef DEBUG_LINUX
     70 #define DPRINTF(a)	uprintf a
     71 #else
     72 #define DPRINTF(a)
     73 #endif
     74 
     75 /*
     76  * Linux wants to pass everything to a syscall in registers.
     77  * However mmap() has 6 of them. Oops: out of register error.
     78  * They just pass everything in a structure.
     79  */
     80 int
     81 linux_sys_old_mmap(struct lwp *l, void *v, register_t *retval)
     82 {
     83 	struct linux_sys_old_mmap_args /* {
     84 		syscallarg(struct linux_oldmmap *) lmp;
     85 	} */ *uap = v;
     86 	struct linux_oldmmap lmap;
     87 	struct linux_sys_mmap_args nlmap;
     88 	int error;
     89 
     90 	if ((error = copyin(SCARG(uap, lmp), &lmap, sizeof lmap)))
     91 		return error;
     92 
     93 	if (lmap.lm_offset & PAGE_MASK)
     94 		return EINVAL;
     95 
     96 	SCARG(&nlmap,addr) = lmap.lm_addr;
     97 	SCARG(&nlmap,len) = lmap.lm_len;
     98 	SCARG(&nlmap,prot) = lmap.lm_prot;
     99 	SCARG(&nlmap,flags) = lmap.lm_flags;
    100 	SCARG(&nlmap,fd) = lmap.lm_fd;
    101 	SCARG(&nlmap,offset) = lmap.lm_offset;
    102 	DPRINTF(("old_mmap(%#x, %u, %u, %u, %d, %u)\n",
    103 	    lmap.lm_addr, lmap.lm_len, lmap.lm_prot, lmap.lm_flags,
    104 	    lmap.lm_fd, lmap.lm_offset));
    105 	return linux_sys_mmap(l, &nlmap, retval);
    106 }
    107 
    108