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From: Samuel Thibault <samuel.thibault@ens-lyon.org>
To: Juergen Gross <jgross@suse.com>
Cc: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org
Subject: Re: [PATCH] mini-os: use -m elf_i386 for final linking
Date: Thu, 16 Apr 2020 14:46:36 +0200	[thread overview]
Message-ID: <20200416124636.35zgnf5bhq3d3bpw@function> (raw)
In-Reply-To: <20200416122731.22713-1-jgross@suse.com>


Juergen Gross, le jeu. 16 avril 2020 14:27:31 +0200, a ecrit:
> Using the standard -m elf_x86_64 for 64-bit mini-os results in the
> first section (.text) to start only at offset 2MB in the binary file.

? I'm not seeing this on my system:

  0 .text         0001933a  0000000000000000  0000000000000000  00001000  2**12
                  CONTENTS, ALLOC, LOAD, READONLY, CODE

so only 4K offset in the file, the file ends up being 135K big after
stripping.

> Using -m elf_i386 avoids that problem without any visible disadvantage.

Using a 32bit emulation for a 64bit binary? This looks very odd to me?
(and probably fragile)

I'd like to know more where this 2MB binary file offset is coming from,
since AIUI it'd basically impact all binaries built by the toolchain of
your system, not just mini-os, and I don't think the maintainers of your
system want that :)

Samuel


  reply	other threads:[~2020-04-16 12:46 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-16 12:27 [PATCH] mini-os: use -m elf_i386 for final linking Juergen Gross
2020-04-16 12:46 ` Samuel Thibault [this message]
2020-04-16 12:58   ` Jürgen Groß
2020-04-16 13:10     ` Samuel Thibault

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