[crosstool-ng/crosstool-ng] 1f5906: samples: add aarch64-rpi3-linux-gnueabi

[Bryan Hundven]

> On Mar 3, 2016, at 4:25 PM, Bryan Hundven <bryanhundven@gmail.com> wrote:
> 
>> 
>> On Mar 3, 2016, at 12:33 PM, Mike Ray <mike@raspberryvi.org> wrote:
>> 
>> On 03/03/2016 17:13, Bryan Hundven wrote:
>>> Branch: refs/heads/master
>>> Home:   https://github.com/crosstool-ng/crosstool-ng
>>> Commit: 1f590667acc1dc1f729c3f4c14612399100f041d
>>>     https://github.com/crosstool-ng/crosstool-ng/commit/1f590667acc1dc1f729c3f4c14612399100f041d
>>> Author: Bryan Hundven <bryanhundven@gmail.com>
>>> Date:   2016-03-03 (Thu, 03 Mar 2016)
>>> 
>>> Changed paths:
>>>   A samples/aarch64-rpi3-linux-gnueabi/crosstool.config
>>>   A samples/aarch64-rpi3-linux-gnueabi/reported.by
>>> 
>>> Log Message:
>>> -----------
>>> samples: add aarch64-rpi3-linux-gnueabi
>>> 
>>> This is a aarch64 raspberry pi 3 sample.
>>> 
>>> Please test!
>>> 
>>> Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
>>> 
>>> 
>>> Commit: bd460e8872ddc7dbbdcb09c2c0a18d22936bf698
>>>     https://github.com/crosstool-ng/crosstool-ng/commit/bd460e8872ddc7dbbdcb09c2c0a18d22936bf698
>>> Author: Bryan Hundven <bryanhundven@gmail.com>
>>> Date:   2016-03-03 (Thu, 03 Mar 2016)
>>> 
>>> Changed paths:
>>>   A samples/aarch64-rpi3-linux-gnueabi/crosstool.config
>>>   A samples/aarch64-rpi3-linux-gnueabi/reported.by
>>> 
>>> Log Message:
>>> -----------
>>> Merge pull request #362 from bhundven/rpi_aarch64_sample
>>> 
>>> samples: add aarch64-rpi3-linux-gnueabi
>>> 
>>> 
>>> Compare: https://github.com/crosstool-ng/crosstool-ng/compare/0f76cad2f078...bd460e8872dd
>>> 
>>> 
>>> 
>>> --
>>> For unsubscribe information see http://sourceware.org/lists.html#faq
>>> 
>> 
>> Hello.
>> 
>> Toolchain built and helloworld app compiled.
>> 
>> Not sure if you intended for the name of the sample to be prefixed
>> 'aarch' instead of 'arch':
>> 
>> 	aarch64-rpi3-linux-gnueabi/
> 
> Yes, aarch64. It’s “arm arch 64” ;)
> They also call arm 32-bit aarch32, but config.sub still search for arm* instead of aarch32.
> 
>> 
>> Output of `file helloworld`:
>> 
>> 	helloworld: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV),
>> dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for
>> GNU/Linux 4.0.4, not stripped
> 
> Looks good!
> 
>> 
>> Built on 64-bit Debian Jessie.
>> 
>> Of course helloworld won't run on my Pi3 with 32-bit Raspbian.
> 
> Right.
> 
>> 
>> Did you intend this sample to not be hard-float? (I don't know whether
>> the Cortex A53 is HF or not).
> 
> Dang, I new I felt like I was jumping the gun when I merged. I’ll fix that.

And that is a nope:
(Quoting ARM.com)
Hard-float ABI by default in ARMv8-A

So we should be good here.

> 
>> 
>> There is some debate on the Foundation site whether running 64-bit with
>> only 1GB of RAM is much of a gain but it will be interesting finding out.
> 
> It’s true. There really isn’t much bonus to running in 64-bit mode without more memory.
> 
>> 
>> Foundation forum mods and developers haven't mentioned whether
>> boot-loader needs to be 64-bit as well.
> 
> Are they releasing 64-bit firmware files?
> 
>> 
>> Mike
> 
> Cheers,
> 
> -Bryan

Cheers,

-Bryan

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