Kernel Application Binary Interface (kABI) support in FreeBSD

[Allan Jude]

On 2015-07-17 10:47, Julian Elischer wrote:
> On 7/17/15 9:02 PM, Venkat Duvvuru wrote:
>> Hi,
>>
>> Is there kABI (Kabi-whitelist) equivalent feature in FreeBSD?
> well, yes and no.
> 
> Firstly, FreeBSD maintains a backwards compatible kABI (with the
> exception of programs that hunt around in kernel memory).
> We also use symbol versioning on the libc. so depending on what you want
> to do. the answer may be useful to you or not.
> Basically any binary should continue to run on a newer kernel, even if
> the syscalls change, because we should still support the old abi.
> 
> tell us more about what you need and we can be more specific.
> 
> I have run Freebsd 1.1 binaries on a Freebsd 8  system, in fact I have
> done a system build in a freebsd 1.1 chroot on an 8 system.
> I haven't tried it on 9 or 10 but I'd expect it to work..
> 
> 
>>
>>
>>
>> Thanks,
>>
>> Venkat.
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>>
> 
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I think the question related to drivers (kernel modules).

In which case, they should be compatible across major versions (module
from 10.0 works in 10.2, but not 9.3 or 11.0)

-- 
Allan Jude

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