sys/compat/linux/common/linux_oldmmap.c

   1 /*      $NetBSD: linux_oldmmap.c,v 1.71 2008/12/03 12:51:11 ad 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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: linux_oldmmap.c,v 1.71 2008/12/03 12:51:11 ad Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/mount.h>
  38
  39 #include <sys/sched.h>
  40 #include <sys/syscallargs.h>
  41
  42 #include <uvm/uvm_param.h>
  43
  44 #ifdef __amd64__
  45 #include <compat/netbsd32/netbsd32.h>
  46
  47 #include <compat/linux32/common/linux32_types.h>
  48 #include <compat/linux32/common/linux32_machdep.h>
  49 #endif
  50
  51 #include <compat/linux/common/linux_types.h>
  52 #include <compat/linux/common/linux_mmap.h>
  53 #include <compat/linux/common/linux_oldmmap.h>
  54 #include <compat/linux/common/linux_signal.h>
  55 #include <compat/linux/common/linux_ipc.h>
  56 #include <compat/linux/common/linux_sem.h>
  57
  58 #include <compat/linux/linux_syscallargs.h>
  59
  60 /* Used on: arm, i386, m68k */
  61 /* Used for linux32 on: amd64 */
  62 /* Not used on: alpha, mips, pcc, sparc, sparc64 */
  63
  64 #undef DPRINTF
  65 #ifdef DEBUG_LINUX
  66 #define DPRINTF(a)      uprintf a
  67 #else
  68 #define DPRINTF(a)
  69 #endif
  70
  71 /*
  72  * Linux wants to pass everything to a syscall in registers.
  73  * However mmap() has 6 of them. Oops: out of register error.
  74  * They just pass everything in a structure.
  75  */
  76 int
  77 linux_sys_old_mmap(struct lwp *l, const struct linux_sys_old_mmap_args *uap, register_t *retval)
  78 {
  79         /* {
  80                 syscallarg(struct linux_oldmmap *) lmp;
  81         } */
  82         struct linux_oldmmap lmap;
  83         struct linux_sys_mmap_args nlmap;
  84         int error;
  85
  86         if ((error = copyin(SCARG(uap, lmp), &lmap, sizeof lmap)))
  87                 return error;
  88
  89         if (lmap.lm_offset & PAGE_MASK) {
  90                 DPRINTF(("old_mmap: 0x%x\n", lmap.lm_offset));
  91                 return EINVAL;
  92         }
  93
  94         SCARG(&nlmap,addr) = lmap.lm_addr;
  95         SCARG(&nlmap,len) = lmap.lm_len;
  96         SCARG(&nlmap,prot) = lmap.lm_prot;
  97         SCARG(&nlmap,flags) = lmap.lm_flags;
  98         SCARG(&nlmap,fd) = lmap.lm_fd;
  99         SCARG(&nlmap,offset) = lmap.lm_offset;
 100         error = linux_sys_mmap(l, &nlmap, retval);
 101         DPRINTF(("old_mmap(%#x, %u, %u, %u, %d, %u) = %d\n",
 102             lmap.lm_addr, lmap.lm_len, lmap.lm_prot, lmap.lm_flags,
 103             lmap.lm_fd, lmap.lm_offset, error));
 104         return error;
 105 }
 106