Re: [U-Boot-Users] clarifications u-boot for arm

See bottom posted reply.

Russell Peterson wrote:

Hello,

The answer to your question "who calls start_armboot?" is answered by you ASM code below. Hint... take a close look at the regsiter you are loading.

:-)

Regards,

Russell

On 7/14/06, *Ram* <vshrirama@gmail.com mailto:vshrirama@gmail.com> wrote:

Hi,
  Thanks for your response. I have gone much further and would like
to know If

     ldr pc, _start_armboot
    _start_armboot:
        .word start_armboot


   Does this really invoke start_armboot?.  This is because
_start_armboot is what is
   stored in pc and not start_armboot and there is also a branch
point _start_armboot (underscore start_armboot) Please see above.

  Actually the above declares a variable start_armboot and does not
invoke the function
  start_armboot. If this is true, then who calls start_armboot?

[snip - I believe your observations are correct, but am not an expert]

Thanks and Regards,
sriram

Sriram:

C compiler naming convention prepends an underscore to the C function name so the C function start_armboot() can be referenced from assembly as a branch (call) to the label _start_armboot.

gvb