| 1 | /*
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| 2 | * Copyright (c) 2006 Ondrej Palkovsky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libposix
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #include "../internal/common.h"
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| 36 | #include <sys/mman.h>
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| 37 | #include <sys/types.h>
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| 38 | #include <as.h>
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| 39 | #include <unistd.h>
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| 40 |
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| 41 | static int _prot_to_as(int prot)
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| 42 | {
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| 43 | int ret = 0;
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| 44 |
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| 45 | if (prot & PROT_READ)
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| 46 | ret |= AS_AREA_READ;
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| 47 |
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| 48 | if (prot & PROT_WRITE)
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| 49 | ret |= AS_AREA_WRITE;
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| 50 |
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| 51 | if (prot & PROT_EXEC)
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| 52 | ret |= AS_AREA_EXEC;
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| 53 |
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| 54 | return ret;
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| 55 | }
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| 56 |
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| 57 | void *mmap(void *start, size_t length, int prot, int flags, int fd,
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| 58 | off_t offset)
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| 59 | {
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| 60 | if (!start)
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| 61 | start = AS_AREA_ANY;
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| 62 |
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| 63 | #if 0
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| 64 | if (!((flags & MAP_SHARED) ^ (flags & MAP_PRIVATE)))
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| 65 | return MAP_FAILED;
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| 66 | #endif
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| 67 |
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| 68 | if (!(flags & MAP_ANONYMOUS))
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| 69 | return MAP_FAILED;
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| 70 |
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| 71 | return as_area_create(start, length, _prot_to_as(prot), AS_AREA_UNPAGED);
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| 72 | }
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| 73 |
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| 74 | int munmap(void *start, size_t length)
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| 75 | {
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| 76 | int rc = as_area_destroy(start);
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| 77 | if (rc != EOK) {
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| 78 | errno = rc;
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| 79 | return -1;
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| 80 | }
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| 81 | return 0;
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| 82 | }
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| 83 |
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| 84 | /** @}
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| 85 | */
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