From: Robert Pluim <rpluim@gmail.com>
To: Stefan Kangas <stefan@marxist.se>
Cc: Roland Kaufmann <rlndkfmn+emacs@gmail.com>, 41994@debbugs.gnu.org
Subject: bug#41994: Emacs on Apple ARM devices
Date: Fri, 14 Aug 2020 16:15:40 +0200 [thread overview]
Message-ID: <m24kp55n5f.fsf@gmail.com> (raw)
In-Reply-To: <CADwFkmk9b6P5v=871AM1wFynKhtR32yfk3mWbZHjvti=T6TkuQ@mail.gmail.com> (Stefan Kangas's message of "Fri, 14 Aug 2020 02:17:18 -0700")
>>>>> On Fri, 14 Aug 2020 02:17:18 -0700, Stefan Kangas <stefan@marxist.se> said:
Stefan> Roland Kaufmann <rlndkfmn+emacs@gmail.com> writes:
>> Code generation on Apple's ARM devices is mostly similar to MacOS, except that
>> they expect a code signature section, which to avoid wasting too many bytes, are
>> not aligned on page size as with code, but rather to nearest 16 bytes. In
>> addition, the ARM compiler will also emit some relative pointer relocation
>> records, which it seems can be safely ignored as sections aren't rearranged.
>>
>> This changeset implements those changes on the Mach-O dumper so that Emacs can
>> be compiled for ARM devices. With the ongoing convergence between the MacOS and
>> iOS platform, and the increasing importance of code-signing in later MacOS
>> versions, I think it could be nice to mainline these changes.
>>
>> Since these sections do not occur in current MacOS builds - otherwise they would
>> generate errors for being unknown - the changes should not impact existing
>> places where Emacs build, and it would not work on iOS without to begin with.
>>
>> Hat tip to Aaron Griffith for sharing his knowledge.
Stefan> This series of patches was submitted 8 weeks ago, but never got a reply
Stefan> at the time.
Stefan> Could someone with more knowledge about this please help review it?
Are these patches even still needed now that emacs-27 has a portable
dumper?
Robert
next prev parent reply other threads:[~2020-08-14 14:15 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-21 22:13 bug#41994: Emacs on Apple ARM devices Roland Kaufmann
2020-08-14 9:17 ` Stefan Kangas
2020-08-14 14:15 ` Robert Pluim [this message]
2020-08-14 20:11 ` Alan Third
2020-08-14 22:10 ` Roland Kaufmann
2020-08-14 23:04 ` Alan Third
2020-08-15 7:38 ` Roland Kaufmann
2020-08-15 11:45 ` Robert Pluim
2020-08-15 16:17 ` Alan Third
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