From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org
Subject: Re: [PATCH 1/5] Linux: Implement a useful version of _startup_fatal
Date: Tue, 3 May 2022 14:01:42 -0300 [thread overview]
Message-ID: <7d39fd76-9802-03ca-0a24-bff8223eb53e@linaro.org> (raw)
In-Reply-To: <87czguftaw.fsf@oldenburg.str.redhat.com>
On 03/05/2022 13:57, Florian Weimer via Libc-alpha wrote:
> * H. J. Lu:
>
>> On Tue, May 3, 2022 at 9:44 AM Florian Weimer <fweimer@redhat.com> wrote:
>>>
>>> * H. J. Lu:
>>>
>>>> On Tue, May 3, 2022 at 9:01 AM Florian Weimer <fweimer@redhat.com> wrote:
>>>>>
>>>>> * H. J. Lu:
>>>>>
>>>>>> The startup codes can't use cancellation before it is ready. Do we need to
>>>>>> check SHARED in this case?
>>>>>
>>>>> I think __libc_fatal shouldn't be a cancellation point. That's not
>>>>> really related to SHARED.
>>>>
>>>> Should we define _startup_fatal unconditionally and always define
>>>> I386_USE_SYSENTER as 0 for i386 so that _startup_fatal can be
>>>> used safely during startup?
>>>
>>> Hmm. Isn't that what my patch does?
>>>
>>
>> Your patch still checks BUILD_PIE_DEFAULT and SHARED.
>
> Ah, I see, thanks. You are right, the i386 version should define
> I386_USE_SYSENTER unconditionally. Will fix.
I think you might want to check ia64 as well, since it uses a TCB variable
to call the syscall in some cases.
next prev parent reply other threads:[~2022-05-03 17:01 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-02 19:15 [PATCH 0/5] Linux: Fall back to mmap if early sbrk fails Florian Weimer
2022-05-02 19:15 ` [PATCH 1/5] Linux: Implement a useful version of _startup_fatal Florian Weimer
2022-05-02 19:45 ` H.J. Lu
2022-05-02 19:52 ` Florian Weimer
2022-05-02 20:06 ` H.J. Lu
2022-05-02 20:37 ` Florian Weimer
2022-05-03 5:18 ` Florian Weimer
2022-05-03 15:54 ` H.J. Lu
2022-05-03 16:00 ` Florian Weimer
2022-05-03 16:36 ` H.J. Lu
2022-05-03 16:43 ` Florian Weimer
2022-05-03 16:46 ` H.J. Lu
2022-05-03 16:57 ` Florian Weimer
2022-05-03 17:01 ` Adhemerval Zanella [this message]
2022-05-03 20:16 ` Florian Weimer
2022-05-02 19:15 ` [PATCH 2/5] Linux: Define MMAP_CALL_INTERNAL Florian Weimer
2022-05-03 18:30 ` Florian Weimer
2022-05-04 13:10 ` Stefan Liebler
2022-05-02 19:15 ` [PATCH 3/5] i386: Remove OPTIMIZE_FOR_GCC_5 from Linux libc-do-syscall.S Florian Weimer
2022-05-02 19:20 ` H.J. Lu
2022-05-02 19:15 ` [PATCH 4/5] i386: Honor I386_USE_SYSENTER for 6-argument Linux system calls Florian Weimer
2022-05-02 19:24 ` H.J. Lu
2022-05-02 19:15 ` [PATCH 5/5] csu: Implement and use _dl_early_allocate during static startup Florian Weimer
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