ARM EABI test image

[Warner Losh]

On Mar 2, 2013, at 10:53 AM, Ian Lepore wrote:

> On Sat, 2013-03-02 at 18:21 +0100, Ronald Klop wrote:
>> On Sat, 02 Mar 2013 05:25:56 +0100, Andrew Turner <andrew at fubar.geek.nz>  
>> wrote:
>> 
>>> Hello,
>>> 
>>> I have built an updated ARM EABI test image for Raspberry Pi [1].
>>> 
>>> The only known issue is c++ exception handling is broken when
>>> using in a dynamically linked executable. Static executables should
>>> work with c++ exceptions.
>>> 
>>> To test it you will have to extract it using unxz and dd it to an sd
>>> card, for example, with a USB to SD adapter on /dev/da0:
>>> $ unxz bsd-pi-eabi-r247609.img.xz
>>> $ dd if=bsd-pi-eabi-r247609.img of=/dev/da0
>>> 
>>> If you don't have a Raspberry Pi but would like to try it on your board
>>> you can add -DWITH_ARM_EABI to the make commands you use to build and
>>> install world and the kernel.
>> 
>> Is this also interesing on the older SHEEVAPLUG?
>> If yes, I can test it somewhere next week.
>> 
>> Ronald.
> 
> As I understand it, the plan is that eventually everything is EABI,
> including the older armv4/5 stuff, so that needs testing too.
> 
> You know what I haven't stumbled across yet is a simple explanation of
> why EABI is better then OABI.  I tried to search for some info the other
> day, but there are so many noise hits on the search I didn't find a
> simple synopsis of differences or advantages.

Alignment of structures is more like x86. This makes all the weird hacks we have in the tree to support the old ABI obsolete, and makes all the broken ones that we don't know about fixed.

I'm sure there's a bunch more, but that's the main reason I want it :)

Warner