Subversion Repositories HelenOS

unative_t sys_task_spawn(void *image, size_t size)

{

    void *kimage = malloc(size, 0);

    if (kimage == NULL)

        return ENOMEM;

    int rc = copy_from_uspace(kimage, image, size);

    if (rc != EOK)

        return rc;

    /*

     * Not very efficient and it would be better to call it on code only,

     * but this whole function is a temporary hack anyway and one day it

     * will go in favor of the userspace dynamic loader.

     */

    smc_coherence_block(kimage, size);

    uspace_arg_t *kernel_uarg;

    kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0);

    if (kernel_uarg == NULL) {

        free(kimage);

        return ENOMEM;

    }

    kernel_uarg->uspace_entry =

        (void *) ((elf_header_t *) kimage)->e_entry;

    kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS;

    kernel_uarg->uspace_thread_function = NULL;

    kernel_uarg->uspace_thread_arg = NULL;

    kernel_uarg->uspace_uarg = NULL;

    as_t *as = as_create(0);

    if (as == NULL) {

        free(kernel_uarg);

        free(kimage);

        return ENOMEM;

    }

    unsigned int erc = elf_load((elf_header_t *) kimage, as, ELD_F_NONE);

    if (erc != EE_OK) {

        as_destroy(as);

        free(kernel_uarg);

        free(kimage);

        return ENOENT;

    }

    as_area_t *area = as_area_create(as,

        AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE,

        LOADED_PROG_STACK_PAGES_NO * PAGE_SIZE, USTACK_ADDRESS,

        AS_AREA_ATTR_NONE, &anon_backend, NULL);

    if (area == NULL) {

        as_destroy(as);

        free(kernel_uarg);

        free(kimage);

        return ENOMEM;

    }

    task_t *task = task_create(as, "app");

    if (task == NULL) {

        as_destroy(as);

        free(kernel_uarg);

        free(kimage);

        return ENOENT;

    }

    // FIXME: control the capabilities

    cap_set(task, cap_get(TASK));

    thread_t *thread = thread_create(uinit, kernel_uarg, task,

        THREAD_FLAG_USPACE, "user", false);

    if (thread == NULL) {

        task_destroy(task);

        as_destroy(as);

        free(kernel_uarg);

        free(kimage);

        return ENOENT;

    }

    thread_ready(thread);

    return EOK;

}