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      1 /*	$NetBSD: linux_oldmmap.c,v 1.74 2021/11/25 03:08:04 ryo 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 1.74 2021/11/25 03:08:04 ryo 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: aarch64, 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 
    107