| 1 | /*
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| 2 | * Copyright (c) 2012 Jakub Jermar
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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 kernel_generic_ipc
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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 <ipc/sysipc_ops.h>
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| 36 | #include <ipc/ipc.h>
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| 37 | #include <mm/as.h>
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| 38 | #include <synch/spinlock.h>
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| 39 | #include <proc/task.h>
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| 40 | #include <syscall/copy.h>
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| 41 | #include <abi/errno.h>
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| 42 | #include <arch.h>
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| 43 |
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| 44 | static errno_t request_preprocess(call_t *call, phone_t *phone)
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| 45 | {
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| 46 | size_t size = as_area_get_size(ipc_get_arg1(&call->data));
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| 47 |
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| 48 | if (!size)
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| 49 | return EPERM;
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| 50 | ipc_set_arg2(&call->data, size);
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| 51 |
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| 52 | return EOK;
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| 53 | }
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| 54 |
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| 55 | static errno_t answer_preprocess(call_t *answer, ipc_data_t *olddata)
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| 56 | {
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| 57 | errno_t rc = EOK;
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| 58 |
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| 59 | if (!ipc_get_retval(&answer->data)) {
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| 60 | /* Accepted, handle as_area receipt */
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| 61 |
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| 62 | irq_spinlock_lock(&answer->sender->lock, true);
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| 63 | as_t *as = answer->sender->as;
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| 64 | irq_spinlock_unlock(&answer->sender->lock, true);
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| 65 |
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| 66 | uintptr_t dst_base = (uintptr_t) -1;
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| 67 | rc = as_area_share(as, ipc_get_arg1(olddata),
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| 68 | ipc_get_arg2(olddata), AS, ipc_get_arg3(olddata),
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| 69 | &dst_base, ipc_get_arg1(&answer->data));
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| 70 |
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| 71 | if (rc == EOK) {
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| 72 | rc = copy_to_uspace((void *) ipc_get_arg2(&answer->data),
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| 73 | &dst_base, sizeof(dst_base));
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| 74 | }
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| 75 |
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| 76 | ipc_set_retval(&answer->data, rc);
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| 77 | }
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| 78 |
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| 79 | return rc;
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| 80 | }
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| 81 |
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| 82 | sysipc_ops_t ipc_m_share_out_ops = {
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| 83 | .request_preprocess = request_preprocess,
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| 84 | .request_forget = null_request_forget,
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| 85 | .request_process = null_request_process,
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| 86 | .answer_cleanup = null_answer_cleanup,
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| 87 | .answer_preprocess = answer_preprocess,
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| 88 | .answer_process = null_answer_process,
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| 89 | };
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| 90 |
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| 91 | /** @}
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| 92 | */
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