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Line 63... Line 63...
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{
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{
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    ipl_t ipl;
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    ipl_t ipl;
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    cap_t caps;
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    cap_t caps;
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    task_t *t;
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    task_t *t;
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    int flags;
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    int flags;
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    count_t i;
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    mem_backend_data_t backend_data = { .d1 = (__native) pf, .d2 = (__native) pages };
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    /*
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    /*
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     * Make sure the caller is authorised to make this syscall.
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     * Make sure the caller is authorised to make this syscall.
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     */
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     */
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    caps = cap_get(TASK);
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    caps = cap_get(TASK);
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    /* Lock the task and release the lock protecting tasks_btree. */
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    /* Lock the task and release the lock protecting tasks_btree. */
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    spinlock_lock(&t->lock);
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    spinlock_lock(&t->lock);
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    spinlock_unlock(&tasks_lock);
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    spinlock_unlock(&tasks_lock);
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    flags = AS_AREA_DEVICE | AS_AREA_READ;
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    flags = AS_AREA_READ;
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    if (writable)
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    if (writable)
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        flags |= AS_AREA_WRITE;
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        flags |= AS_AREA_WRITE;
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    if (!as_area_create(t->as, flags, pages * PAGE_SIZE, vp, AS_AREA_ATTR_NONE, NULL, NULL)) {
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    if (!as_area_create(t->as, flags, pages * PAGE_SIZE, vp, AS_AREA_ATTR_NONE,
- 
 
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        &phys_backend, &backend_data)) {
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        /*
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        /*
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         * The address space area could not have been created.
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         * The address space area could not have been created.
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         * We report it using ENOMEM.
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         * We report it using ENOMEM.
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         */
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         */
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        spinlock_unlock(&t->lock);
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        spinlock_unlock(&t->lock);
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        interrupts_restore(ipl);
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        interrupts_restore(ipl);
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        return ENOMEM;
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        return ENOMEM;
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    }
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    }
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    /* Initialize page tables. */
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    /*
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    for (i = 0; i < pages; i++)
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        as_set_mapping(t->as, vp + i * PAGE_SIZE, pf + i * FRAME_SIZE);
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     * Mapping is created on-demand during page fault.
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     */
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    spinlock_unlock(&t->lock);
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    spinlock_unlock(&t->lock);
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    interrupts_restore(ipl);
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    interrupts_restore(ipl);
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    return 0;
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    return 0;
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}
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}
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