Date: Wed, 25 Jan 2023 17:22:21 +0100 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@FreeBSD.org> To: Jessica Clarke <jrtc27@freebsd.org> Cc: "src-committers@freebsd.org" <src-committers@FreeBSD.org>, "dev-commits-src-all@freebsd.org" <dev-commits-src-all@FreeBSD.org>, "dev-commits-src-main@freebsd.org" <dev-commits-src-main@FreeBSD.org> Subject: Re: git: 783c318fd118 - main - zoneinfo: On amd64, include 32-bit data. Message-ID: <865ycua8jm.fsf@ltc.des.no> In-Reply-To: <FE7BB6AA-052E-4CFB-AD53-33A397324A84@freebsd.org> (Jessica Clarke's message of "Wed, 25 Jan 2023 16:05:54 %2B0000") References: <202301251555.30PFtxeh015569@gitrepo.freebsd.org> <FE7BB6AA-052E-4CFB-AD53-33A397324A84@freebsd.org>
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Jessica Clarke <jrtc27@freebsd.org> writes:
> Dag-Erling Sm=C3=B8rgrav <des@FreeBSD.org> writes:
> > zoneinfo: On amd64, include 32-bit data.
> I=E2=80=99m not sure how this makes sense. Isn=E2=80=99t the file format =
entirely MI?
It's not machine independent so much as multi-target. The file
structure is basically:
32-bit header
32-bit data
64-bit header
64-bit data
Recent versions leave out the 32-bit data unless you pass -b fat on the
command line. To a legacy binary, that looks like a valid file (the
32-bit header is still present) with no transitions.
DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@FreeBSD.org
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