4ce85d0b6f
This allows alternate implementations to reuse these parts, and the file parts will at the next hypercall revision be moved to their own driver. Discussed with pooka@
110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
/*
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* Copyright (c) 2007-2010 Antti Kantee. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "rumpuser_port.h"
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#if !defined(lint)
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__RCSID("$NetBSD: rumpuser_mem.c,v 1.1 2014/07/09 23:41:40 justin Exp $");
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#endif /* !lint */
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#include <sys/mman.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <rump/rumpuser.h>
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#include "rumpuser_int.h"
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int
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rumpuser_malloc(size_t howmuch, int alignment, void **memp)
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{
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void *mem = NULL;
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int rv;
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if (alignment == 0)
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alignment = sizeof(void *);
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rv = posix_memalign(&mem, (size_t)alignment, howmuch);
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if (__predict_false(rv != 0)) {
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if (rv == EINVAL) {
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printf("rumpuser_malloc: invalid alignment %d\n",
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alignment);
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abort();
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}
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}
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*memp = mem;
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ET(rv);
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}
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/*ARGSUSED1*/
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void
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rumpuser_free(void *ptr, size_t size)
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{
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free(ptr);
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}
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int
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rumpuser_anonmmap(void *prefaddr, size_t size, int alignbit,
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int exec, void **memp)
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{
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void *mem;
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int prot, rv;
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#ifndef MAP_ALIGNED
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#define MAP_ALIGNED(a) 0
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if (alignbit)
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fprintf(stderr, "rumpuser_anonmmap: warning, requested "
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"alignment not supported by hypervisor\n");
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#endif
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prot = PROT_READ|PROT_WRITE;
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if (exec)
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prot |= PROT_EXEC;
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mem = mmap(prefaddr, size, prot,
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MAP_PRIVATE | MAP_ANON | MAP_ALIGNED(alignbit), -1, 0);
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if (mem == MAP_FAILED) {
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rv = errno;
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} else {
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*memp = mem;
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rv = 0;
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}
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ET(rv);
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}
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void
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rumpuser_unmap(void *addr, size_t len)
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{
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munmap(addr, len);
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}
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