[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#41994: Emacs on Apple ARM devices
From: |
Robert Pluim |
Subject: |
bug#41994: Emacs on Apple ARM devices |
Date: |
Fri, 14 Aug 2020 16:15:40 +0200 |
>>>>> 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