Function _lwp_thread_entry

components/lwp/lwp.c:295–332

* @brief Entry point for light-weight process threads * * @param[in] parameter Thread parameter (unused) * * @note This function is the main entry point for threads created within a light-weight process. * It handles thread initialization, debug mode setup, and transitions to user mode. */

 *       It handles thread initialization, debug mode setup, and transitions to user mode.
 */
static void _lwp_thread_entry(void *parameter)
{
    rt_thread_t tid;
    struct rt_lwp *lwp;

    tid = rt_thread_self();
    lwp = (struct rt_lwp *)tid->lwp;
    tid->cleanup = lwp_cleanup;
    tid->user_stack = RT_NULL;

    if (lwp->debug)
    {
        lwp->bak_first_inst = *(uint32_t *)lwp->text_entry;
        *(uint32_t *)lwp->text_entry = dbg_get_ins();
        rt_hw_cpu_dcache_ops(RT_HW_CACHE_FLUSH, lwp->text_entry, sizeof(uint32_t));
        icache_invalid_all();
    }

    /**
     * without ASID support, it will be a special case when trying to run application
     * and exit multiple times and a same page frame allocated to it bound to
     * different text segment. Then we are in a situation where icache contains
     * out-of-dated data and must be handle by the running core itself.
     * with ASID support, this should be a rare case that ASID & page frame both
     * identical to previous running application.
     *
     * For a new application loaded into memory, icache are seen as empty. And there
     * should be nothing in the icache entry to match. So this icache invalidation
     * operation should have barely influence.
     */
    rt_hw_icache_invalidate_all();

#ifdef ARCH_MM_MMU
    arch_start_umode(lwp->args, lwp->text_entry, (void *)USER_STACK_VEND, (char *)tid->stack_addr + tid->stack_size);
#else
    arch_start_umode(lwp->args, lwp->text_entry, lwp->data_entry, (void *)((uint32_t)lwp->data_entry + lwp->data_size));
#endif /* ARCH_MM_MMU */
}

/**
 * @brief Get the current light-weight process