From: "H. Peter Anvin" <hpa@zytor.com>
To: Eugene Syromyatnikov <evgsyr@gmail.com>
Cc: Charlie Jenkins <charlie@rivosinc.com>,
"Dmitry V. Levin" <ldv@strace.io>,
Oleg Nesterov <oleg@redhat.com>,
Mike Frysinger <vapier@gentoo.org>,
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Subject: Re: [PATCH v2 3/7] syscall.h: add syscall_set_arguments() and syscall_set_return_value()
Date: Fri, 17 Jan 2025 20:34:45 -0800 [thread overview]
Message-ID: <B5D44A2A-BF4F-4EEA-992D-0A06F2AE08CA@zytor.com> (raw)
In-Reply-To: <CACGkJdtAmtxsPiKYUzLLmfNGf6oJ9YS-25ZY9VvEEWhz37Qx6Q@mail.gmail.com>
On January 17, 2025 7:45:02 AM PST, Eugene Syromyatnikov <evgsyr@gmail.com> wrote:
>On Fri, Jan 17, 2025 at 2:03 AM H. Peter Anvin <hpa@zytor.com> wrote:
>>
>> I link the concept of this patchset, but *please* make it clear in the
>> comments that this does not solve the issue of 64-bit kernel arguments
>> on 32-bit systems being ABI specific.
>
>Sorry, but I don't see how this is relevant; each architecture has its
>own ABI with its own set of peculiarities, and there's a lot of
>(completely unrelated) work needed in order to make an ABI that is
>architecture-agnostic. All this patch set does is provides a
>consistent way to manipulate scno and args across architectures; it
>doesn't address the fact that some architectures have mmap2/mmap_pgoff
>syscall, or that some have fadvise64_64 in addition to fadvise64, or
>the existence of clone2, or socketcall, or ipc; or that some
>architectures don't have open or stat; or that scnos on different
>architectures or even different bit-widths within the "same"
>architecture are different.
>
>> This isn't unique to this patch in any way; the only way to handle it is
>> by keeping track of each ABI.
>
>That's true, but this patch doesn't even try to address that.
>
I just want it noted in the comment, that's all.
next prev parent reply other threads:[~2025-01-18 4:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20250113170925.GA392@strace.io>
2025-01-13 17:11 ` [PATCH v2 3/7] syscall.h: add syscall_set_arguments() and syscall_set_return_value() Dmitry V. Levin
2025-01-16 2:20 ` Charlie Jenkins
2025-01-17 0:59 ` H. Peter Anvin
2025-01-17 15:45 ` Eugene Syromyatnikov
2025-01-18 4:34 ` H. Peter Anvin [this message]
2025-01-13 17:11 ` [PATCH v2 4/7] syscall.h: introduce syscall_set_nr() Dmitry V. Levin
2025-01-16 2:20 ` Charlie Jenkins
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