In message <[EMAIL PROTECTED]> you wrote:
> The call command tries to mimic a function call in that the 'arg's to
> the command are passed in registers according to the PPC ABI.
>
> The prototype that call mimics is some variation of the following
> depending on how many arguments are passed to the command:
>
> void func(void)
> void func(unsigned long r3)
> void func(unsigned long r3, unsigned long r4)
> ...
> void func(unsigned long r3, unsigned long r4, ... unsigned long r10)
>
> The maximum number of 'arg's is 8. There are no arguments passed on
> a stack, no floating point or vector arguments.
This really makes zero sense to me.
> + img = (int (*)(ulong, ulong, ulong, ulong,
> + ulong, ulong, ulong, ulong)) addr;
> +
> + for (i = 2; i < argc; i++)
> + r[i-2] = simple_strtoul(argv[i], NULL, 16);
> +
> + return (*img)(r[0], r[1], r[2], r[3], r[4], r[5], r[6], r[7]);
This looks not clean. Either this is a function with exactly 8
arguments, or it isn't. And where is the code that makes sure that
``the 'arg's to the command are passed in registers'' ? I see no
difference between this call and what "go" does.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [EMAIL PROTECTED]
"More software projects have gone awry for lack of calendar time than
for all other causes combined."
- Fred Brooks, Jr., _The Mythical Man Month_
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