[ECOS] Strange Problems !!!

[ECOS] Strange Problems !!!

[Harsha D]

Hi 

Currently i have a ram version of redboot running on my ARM platform.
(Redboot prompt is visible).
But none of the commands (like help, version, load) were working(redboot
hangs).  On debugging
i found that it was hanging at 

		(cmd->fun)(argc, argv);

in ecos/packages/redboot/current/src/main.c, after parsing the command.


So for debugging i put a printf inside the do_help function (in
main.cpp), to see if it was being called,
surprisingly help command worked!!!

void do_help()
{
	..

	diag_printf("\nInside do_help");

	..
	..
}

I tried removing the above printf.  and help didnot work !!!  I tested
it for 2-3 times. 

1.
Now i am worried as to how this printf is making the difference in
getting the output.
I think this must b the case for other commands too.

2.
Also i find that sometimes, the parse command looses the argument value.
i.e. although
"help" string is being sent when calling, inside the function the
argument has no value
at all

I am using gcc ver 3.2.1.  Please throw some light on the above issues.


regards
harsha

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Re: [ECOS] Strange Problems !!!

[keshava]

harsha,

check if the stack pointer is properly set.

-keshav

--- Harsha D <harshad@sanyo.co.in> wrote:

> Hi 
> 
> Currently i have a ram version of redboot running on
> my ARM platform.
> (Redboot prompt is visible).
> But none of the commands (like help, version, load)
> were working(redboot
> hangs).  On debugging
> i found that it was hanging at 
> 
> 		(cmd->fun)(argc, argv);
> 
> in ecos/packages/redboot/current/src/main.c, after
> parsing the command.
> 
> 
> So for debugging i put a printf inside the do_help
> function (in
> main.cpp), to see if it was being called,
> surprisingly help command worked!!!
> 
> void do_help()
> {
> 	..
> 
> 	diag_printf("\nInside do_help");
> 
> 	..
> 	..
> }
> 
> I tried removing the above printf.  and help didnot
> work !!!  I tested
> it for 2-3 times. 
> 
> 1.
> Now i am worried as to how this printf is making the
> difference in
> getting the output.
> I think this must b the case for other commands too.
> 
> 2.
> Also i find that sometimes, the parse command looses
> the argument value.
> i.e. although
> "help" string is being sent when calling, inside the
> function the
> argument has no value
> at all
> 
> I am using gcc ver 3.2.1.  Please throw some light
> on the above issues.
> 
> 
> regards
> harsha
> 
> --
> Before posting, please read the FAQ:
> http://ecos.sourceware.org/fom/ecos
> and search the list archive:
> http://ecos.sourceware.org/ml/ecos-discuss
> 
> 


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Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss