[U-Boot-Users] [PATCH] Add call command on PPC

[Kumar Gala]

On Feb 15, 2008, at 1:29 AM, Mike Frysinger wrote:

> On Friday 15 February 2008, Haavard Skinnemoen wrote:
>> Mike Frysinger <vapier at gentoo.org> wrote:
>>>> if someone can tell me what the number of args are for each arch we
>>>> can see about providing this everywhere.
>>>
>>> are you sure you actually need to worry about such things ?  i'm  
>>> pretty
>>> sure any relevant architecture says that the first X arguments go  
>>> via
>>> registers and the rest go on the stack.  let the compiler worry  
>>> about the
>>> exact value for X.
>>
>> I guess the real question is whether it's acceptable to pass  
>> arguments
>> on the stack to such subprograms. If the answer is yes, why not  
>> simply
>> use varargs?
>
> if the goal is to keep things in registers, "call" and its  
> description are way
> too vague.  the description makes me think this is meant to be a  
> "go" for
> functions.

As per Wolfgang's desires the help is terse, the commit message was  
suppose to convey more details.  But I can see where the confusion  
comes from.  I'm open to better wording and will try to think of some  
myself.

>> If the answer is no: avr32 can pass up to 5 arguments through  
>> registers.
>
> x86 does 0 while Blackfin does 3.

3 arch's down, 6 to go.

- k