On 22/06/2021 12:59, BERTRAND Joël wrote:
> Hello,
>
> I'm writing a firmware for a board that uses a ATMega 1284. Firmware
> continuously restarts
This is likely a branch through zero.
Common causes on AVR are bad function pointers, and stack damage.
-Ian
On 01/05/2021 01:11, David Kelly wrote:
> Has been a long time for me but Once Upon A Time it wasn’t just a matter
> of “not using functions in the library”. AVR-gcc required primatives
> other than startup code.
It still does - not just on AVR - also on ARM and others.
It was quite amusing when
On 21/05/2021 20:50, BERTRAND Joël wrote:
> Hello,
>
> I'm trying to build a recent gcc to check if my issue comes from
> compiler or not.
I recommend using crosstool-ng for this.
Hi,
I'm attempting to build my project, which does not use libc, or libm,
but I do want to link with libgcc.
additionally, I don't want any startup code to be linked - the project
is intended to be fully standalone.
I've had some success with gcc 10, but I need this to work on gcc 5.4.0
as
On 30/04/2021 10:52, dva...@internode.on.net wrote:
>
> Still dabbling a little with AVR once in a while, I add -nostartfiles to
> Ian's -nostdlib, to avoid startup code.
Aha, yes, that one went astray during my attempt to debug this :)
As my most recent dabble is
> -mmcu=attiny2313, with only
On 30/04/2021 09:03, David Brown wrote:
> On 29/04/2021 21:43, Ian Molton wrote:
>> Hi,
>>
>> I'm attempting to build my project, which does not use libc, or libm,
>> but I do want to link with libgcc.
>>
>> additionally, I don't want any startup code to
This isnt a compiler specific problem, but you might want to try
disassembling the code and seeing whats different -
objdump -D is your friend :)
-Ian
On 15/08/2021 19:30, D.Umbricht wrote:
> Hi all
> I try to move a go program from a raspberry pi to an arduino uno using
> tinygo on the
On 15/08/2021 18:34, BERTRAND Joël wrote:
> I remember I have used uECC a long time ago without this kind of bug. I
> have rebuilt the same code (with uECC_avr defined), but I have compiled
> this library not with gcc 11.1.0, but with 5.4.0.
Just curious - what is the difference in the
ds,
>
> Bruce
>
>
> On 12/17/2021 5:39 AM, Ian Molton wrote:
>> I think you misunderstood me;
>>
>> I know this is where the compiler will save RAMPZ where needed.
>>
>> So why is it
PD will be set and
> "emit_push_sfr()" will never be called in the context you referenced.
>
> Best regards,
>
> Bruce
>
>
> On 12/17/2021 1:33 PM, Ian Molton wrote:
>> Ok, I don't want to sound rude, b
Browsing the GCC source, I found this in gcc/config/avr/avr.c
if (AVR_HAVE_RAMPZ
&& TEST_HARD_REG_BIT (set, REG_Z)
&& TEST_HARD_REG_BIT (set, REG_Z + 1))
{
emit_push_sfr (rampz_rtx, false /* frame */, AVR_HAVE_RAMPD,
treg);
}
I wont pretend to
Hi,
I've dug about in the sourcecode of gcc and gas, in order to understand
how it works.
in particular, in gas
avr_patch_gccisr_frag (fragS *fr, int reg)
There is behaviour, specific to AVR that allows binutils to analyse the
compiler output for interrupt routines, and causes it to generate
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