Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Linux with MMU on NEEK

Hi, all. I'm testing Linux MMU version, on my NEEK. http://www.nioswiki.com/linux It works fine and I can use "bash" shell. This is the evident proof that we are using the true 'fo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Hi,

--- Quote Start ---

If from->sin_addr is a long (or pointer) type, it can assume it is aligned correctly, Thus the compiled code might be correct.

--- Quote End ---

Yes, you are right. And I think this source will not consider the machines that can not do unaligned-access.

--- Quote Start ---

If it is not, I would give memcpy the correct alignment. e.g.: memcpy ((char*)&from -> sin_addr, (char*)&ip -> ip_src, 4);

--- Quote End ---

Maybe, it's OK. And sorry, I made a mistake for the copy direction. 


{ int i;
//unsigned char *pd = &ip -> ip_src, *ps = &from -> sin_addr;
  unsigned char *ps = &ip -> ip_src, *pd = &from -> sin_addr;
  for (i = 0; i < 4; i++)
    *pd++ = *ps++;
}
Kazu