[ECOS] Re: sid

[Scott Dattalo <scott at dattalo dot com>]

I'm sending the response to the list to
On Fri, 26 Jul 2002, arun%anwsi.com@mail3.srivari.net wrote:

> 
> hello scott
> 
>   after clicking arm-simulator in insight .
> it got struck up .it was running for more than a hour without ending.
> 
> since i am new to sid can iknow where to download sid and how to use it?
> 
> please guide me to use sid

I assume you followed the instructions in the second half of:

http://sources.redhat.com/ml/ecos-discuss/2002-07/msg00267.html

After you've connected to the target and loaded the code, set a break in 
main. At the gdb prompt:

gdb> break main

and then run the program.

(i.e. type run at the gdb prompt or navigate through the gui windows or 
type r while the source window has focus).


If you don't reach the break point in main then you have a problem! I 
experienced this on one occasion and it turned out that eCos was spinning 
on the exit thread because there was insufficient RAM for malloc! I 
suspect that there's a similar problem in your case. I also found that the 
simulation will "hang" while waiting for a response for (non-existant) 
hardware. For example, you can't use printf's in your code! In my case, 
I believe printf was redirecting to the serial port and there was a 
blocking call waiting for one of the Hardware control register bits to 
change states. 


If your simulation hangs before you get to the break point in main, then 
halt the simulation. The source window should display where you are in the 
eCos code. If it doesn't then you can click on the drop down box in the 
upper right hand of the source window and change the source display mode 
from "SOURCE" to "ASSEMBLY". Or if you want, type "list" at the gdb 
prompt. This will tell you where you're stuck and hopefully give you a 
hint on what to do.

I'd recommend not going to SID just yet. If the insight simulator doesn't 
work, then neither will SID most likely. 

Scott




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