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      1 /*	$NetBSD: rumpuser_mem.c,v 1.2 2014/08/24 14:37:31 pooka Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2007-2010 Antti Kantee.  All Rights Reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include "rumpuser_port.h"
     29 
     30 #if !defined(lint)
     31 __RCSID("$NetBSD: rumpuser_mem.c,v 1.2 2014/08/24 14:37:31 pooka Exp $");
     32 #endif /* !lint */
     33 
     34 #include <sys/mman.h>
     35 
     36 #include <assert.h>
     37 #include <errno.h>
     38 #include <stdint.h>
     39 #include <stdio.h>
     40 #include <stdlib.h>
     41 
     42 #include <rump/rumpuser.h>
     43 
     44 #include "rumpuser_int.h"
     45 
     46 int
     47 rumpuser_malloc(size_t howmuch, int alignment, void **memp)
     48 {
     49 	void *mem = NULL;
     50 	int rv;
     51 
     52 	if (alignment == 0)
     53 		alignment = sizeof(void *);
     54 
     55 	rv = posix_memalign(&mem, (size_t)alignment, howmuch);
     56 	if (__predict_false(rv != 0)) {
     57 		if (rv == EINVAL) {
     58 			printf("rumpuser_malloc: invalid alignment %d\n",
     59 			    alignment);
     60 			abort();
     61 		}
     62 	}
     63 
     64 	*memp = mem;
     65 	ET(rv);
     66 }
     67 
     68 /*ARGSUSED1*/
     69 void
     70 rumpuser_free(void *ptr, size_t size)
     71 {
     72 
     73 	free(ptr);
     74 }
     75 
     76 int
     77 rumpuser_anonmmap(void *prefaddr, size_t size, int alignbit,
     78 	int exec, void **memp)
     79 {
     80 	void *mem;
     81 	int prot, rv;
     82 
     83 #ifndef MAP_ALIGNED
     84 #define MAP_ALIGNED(a) 0
     85 	if (alignbit)
     86 		fprintf(stderr, "rumpuser_anonmmap: warning, requested "
     87 		    "alignment not supported by hypervisor\n");
     88 #endif
     89 
     90 	prot = PROT_READ|PROT_WRITE;
     91 	if (exec)
     92 		prot |= PROT_EXEC;
     93 	mem = mmap(prefaddr, size, prot,
     94 	    MAP_PRIVATE | MAP_ANON | MAP_ALIGNED(alignbit), -1, 0);
     95 	if (mem == MAP_FAILED) {
     96 		rv = errno;
     97 	} else {
     98 		*memp = mem;
     99 		rv = 0;
    100 	}
    101 
    102 	ET(rv);
    103 }
    104 
    105 void
    106 rumpuser_unmap(void *addr, size_t len)
    107 {
    108 
    109 	munmap(addr, len);
    110 }
    111 
    112