Enrty point in the Task Control Block

Till Straumann strauman at slac.stanford.edu
Mon Jul 4 16:49:50 UTC 2005


The way I read the sources: cpukit/rtems/src/taskstart.c calls 
where the entry point is indeed stored in the 'Start.entry_point' field 
of the TCB. Same for
the argument -- no suprises here...

-- Till

Ali Asgar Nasir wrote:

>Hi everyone...
>I have been searching the entry point of a task in the Task Control Block of
>Following is the structure  Thread_Start_information which is a member of
>typedef struct {
>  Thread_Entry         entry_point;      /* starting thread address
>  Thread_Start_types   prototype;        /* how task is invoked
>  void                *pointer_argument; /* pointer argument
>  unsigned32           numeric_argument; /* numeric argument
>                                         /* initial execution modes
>  boolean              is_preemptible;
>  Thread_CPU_budget_algorithms          budget_algorithm;
>  Thread_CPU_budget_algorithm_callout   budget_callout;
>  unsigned32           isr_level;
>  Priority_Control     initial_priority; /* initial priority
>  boolean              core_allocated_stack;
>  Stack_Control        Initial_stack;    /* stack information
>  void                *fp_context;       /* initial FP context area address
>  void                *stack;            /* initial stack area address
>}   Thread_Start_information;
>However on debugging my code i found that the entry point is not stored in
>Thread_entry entry_point but is stored in unsigned32
>numeric_argument......Can anyone tell me the reason why and also what is
>meant by numeric argument...also let me know if there is any documentation
>available to describe each member of the TCB.
>Ali Asgar
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