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Look at the logic in nuttx/sched/init/nx_bringup.c:

Code Block


  #elif defined(CONFIG_INIT_FILEPATH)
  static inline void nx_start_initthread(void)
  {
    int ret;

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  #ifdef CONFIG_BOARD_LATE_INITIALIZE
    /* Perform any last-minute, board-specific initialization, if so
   * configured.

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*/ board_late_initialize(); #endif
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/* Start the application initialization program from a program in a * mounted file system. Presumably the file system was mounted as

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 part
   * of the board_late_initialize() operation.

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*/ sinfo("Starting init task: %s\n", CONFIG_USER_INITPATH);
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ret = exec(CONFIG_USER_INITPATH, NULL, CONFIG_INIT_SYMTAB, CONFIG_INIT_NEXPORTS); ASSERT(ret >= 0); }

Where exec() is an internal, more primitive function that is the basis for the POSIX standard functions execv() and friends.

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