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Re: Moving Go to a newer NetBSD ABI in the 1.13 dev cycle

On 07.03.2019 10:48, Benny Siegert wrote:
> Hi and apologies for the cross-post,
> Go binaries have always been somewhat special citizens on NetBSD (not
> unlike on other OSes, I might add). Currently, IIUC, they all pretend
> to be built for NetBSD 5.99.51, since that's what I was using when we
> were getting the support going, so this was the oldest version known
> to work.
> However, Go 1.9 is really the last version that was working on NetBSD
> 6, 1.10 and newer effectively need NetBSD 7 or later. This is because
> of some kernel bugfixes. NetBSD 7 is the oldest supported version at
> this point, though support is rapidly waning as (a) NetBSD 9 is coming
> nearer (which will mean end of support for -7) and (b) NetBSD 7 has no
> Spectre/Meltdown mitigations.
> Being soi-disant compatible with 5.99.51 has a cost, namely the need
> for COMPAT_60 to be enabled in the kernel.
> To keep up with supported versions, I would like to move Go to use
> syscall number tables for NetBSD 7 (or perhaps even 8?) and move the
> ELF identification to version 7.0 or 8.0. Trying to get this done in
> time for Go 1.13.
> Any comments, objections, etc. from Go or NetBSD folks?

We should switch to libc calls and reduce users of syscall(2)/__syscall(2).

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