From: Jan Kiszka <jan.kiszka@siemens.com>
To: Richard Weinberger <richard.weinberger@gmail.com>, xenomai@xenomai.org
Subject: Re: 32bit compat mode for arm64
Date: Mon, 2 Mar 2020 13:21:34 +0100 [thread overview]
Message-ID: <3c8788a1-be5b-c424-b16c-1d1903b9e045@siemens.com> (raw)
In-Reply-To: <CAFLxGvwo_gPu9EbMkcicjJ9tCP228oRXQ2XiCb11YBs11xDFJg@mail.gmail.com>
On 29.02.20 12:46, Richard Weinberger via Xenomai wrote:
> On Fri, Feb 28, 2020 at 10:01 PM Richard Weinberger
> <richard.weinberger@gmail.com> wrote:
>>
>> Hi!
>>
>> I noticed that running 32bit arm EABI xenomai userspace is currently
>> not possible
>> on arm64 kernels.
>>
>> From a quick look I see the following tasks to make it happen:
>> - syscall gate adaptations for cobalt arm32 syscalls (they are
>> different from regular arm EABI)
>> - teach ipipe_root_nr_syscalls() on arm64 about __NR_compat_syscalls
>> - Don't use XENOMAI_ABI_REV for compat userspace on arm64
>> - Implement a syscall32-table.h (for COBALT_SYSCALL32emu_DECL() and friends)
>
> One more thing: TSC emulation is missing on arm64.
>
What exactly are you referring to?
Jan
--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux
next prev parent reply other threads:[~2020-03-02 12:21 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-28 21:01 32bit compat mode for arm64 Richard Weinberger
2020-02-28 22:11 ` Lennart Sorensen
2020-02-28 22:16 ` Richard Weinberger
2020-03-02 20:25 ` Lennart Sorensen
2020-03-02 20:33 ` Jan Kiszka
2020-03-02 20:42 ` Lennart Sorensen
2020-02-29 11:46 ` Richard Weinberger
2020-03-02 12:21 ` Jan Kiszka [this message]
2020-03-02 12:34 ` Richard Weinberger
2020-03-02 12:39 ` Jan Kiszka
2020-03-02 12:16 ` Jan Kiszka
2020-03-02 12:52 ` Richard Weinberger
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