Dear Wolfgang Denk.
>On Mon, Jul 13, 2009 at 9:34 PM, Wolfgang Denk wrote:
> When I wrote "GCC's register usage conventions" I usually mean exactly
> that and not some completely different thing.
>
> You also might want to read the README. Search for "On ARM, the
> following registers are used".
Dear Drasko DRASKOVIC,
In message <5ec3d7930907130900l7e043b11lcf37a0d3e161f...@mail.gmail.com> you
wrote:
>
> > Well, that's easy - as the code has to interface with GCC generated
> > code, you have to stick with GCC's register usage conventions.
> >
> I think we were refering here to ATPCS (
>
> Well, that's easy - as the code has to interface with GCC generated
> code, you have to stick with GCC's register usage conventions.
>
I think we were refering here to ATPCS (ARM-THUMB Procedure Call Standard,
i.e. ARM ABI), which tells that first 4 args of the calee are passed by the
caller
Dear Drasko DRASKOVIC,
In message <5ec3d7930907130700h24ab20c3t258e2c31e21bb...@mail.gmail.com> you
wrote:
>
> there is a reason why I use r10 (and why somebody used r8, I suppose) - I
Well, that's easy - as the code has to interface with GCC generated
code, you have to stick with GCC's regis
>
> While the above may work, why you don't just follow the procedure call
> standard instead? Place the value in r0 instead of r10, and you'll have
> it as the first argument to the function.
>
there is a reason why I use r10 (and why somebody used r8, I suppose) - I
search some address during s
On Fri, Jul 10, 2009 at 02:52:32PM +0200, Drasko DRASKOVIC wrote:
[...]
> Suppose that I allocated one register in start.S and put in it some data I
> want to have later on C side. From start.S we enter to start_armboot(void)
> function.
> Would this work :
>
> void start_armboot (void)
> {
>
Hi all,
in libarm/board.c, in function start_armboot(void) I found lines like these:
/* Pointer is writable since we allocated a register for it */
gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
/* compiler optimization barrier needed for GCC >= 3.4 */
__asm__ __vola
7 matches
Mail list logo
