[ECOS] PDA REdboot - GDB file download

["Amit Tuljapurkar" <amit1505 at rediffmail dot com>]

Hello

As per your suggestion I run the ver command on redboot on ipaq 
then it shows Memory from 0x0000 0000 to 0x0200 0000
And available memory from 0x0004 f000 to 0x01fb 0000. i checked 
the hardware specs for the ipaq, it says that from 0x0000 0000 to 
0x07ff ffff. Its all on board flash. & static ram starts from 
0x4000 0000 to 0x 47ff ffff. And dram is from 0x c000 0000 to c7ff 
ffff.

Still I continued and downloaded the Hello (ARM elf file) on H3600 
ipaq. I used the following commands at gdb console..
1.set remotebaud 38400
2.target remote /dev/ttyS0
3.load hello 0x0004f000

Then it downloaded the file from 0x57000 onwards with text,data 
etc all segments.However at the end it said base address to be 
0x8000.

I can say "break main" & continue.. It shows me the right program 
but it doesnt go to main. It goes to a function foo which i have 
written before main. & there if i sa step i get following error.

Program received  signal SIGBUS, Bus error.
0x00008030 in foo(arg=189916) at hello.c:6

What could be the reason ? Why i cant debug this simple program 
hello.c?

Thank you in advance for your replies..
Amit Tuljapurkar



On Tue, 26 Nov 2002 Gary Thomas wrote :
> On Tue, 2002-11-26 at 05:30, Amit Tuljapurkar wrote:
> >
> > Hello,
> >
> > I have installed Redboot on iPAQ PDA in its RAM. & I
> >   have Linux host machine runing GDB. I want to
> >   communicate & remote debug a sample applicaiton
> >   running on the PDA. I can establish remote connection
> >   but I could not load any file to PDA using "load".
> >   Following are the commands I am giving on the gdb
> >   console.
> >   1. set debug remote 1
> >   2. set remotebaud 38400
> >   3. set target remote /dev/ttyS0
> >   4. load
> >
> >   Here it starts downloading the file but for few files
> >   it says
> >   "Error in accessing memory segment .interp"
> >   & for other files it says
> >   "Timed out.. Packet error.. Ignoring & continuing.."
> >
> >   Can you please tell me how to go about this problem??
> >   I am using the arm-linux-gcc for compilation.
>
> You're trying to load code into non-existent memory, or
> into memory that RedBoot is using itself.  Try starting up
> RedBoot to a "terminal" (like minicom) and running the
> "version" command.  This will display the available memory
> range.  For example:
>   RAM: 0x00000000-0x00800000, 0x0002eab0-0x007ed000 available
> says that this platform has 8MB, but only the RAM from 
> 0x0002eab0
> through 0x007ed000 can be used to load programs.  (the rest
> is in use by RedBoot itself)
>
> --
> ------------------------------------------------------------
> Gary Thomas                  |
> eCosCentric, Ltd.            |
> +1 (970) 229-1963            |  eCos & RedBoot experts
> gthomas@ecoscentric.com      |
> http://www.ecoscentric.com/  |
> ------------------------------------------------------------




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