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From: Zack Weinberg <zackw-VmQCmMdMyN0AvxtiuMwx3w@public.gmane.org>
To: Rich Felker <dalias-8zAoT0mYgF4@public.gmane.org>
Cc: "H.J. Lu" <hjl.tools-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	"Michael Kerrisk (man-pages)"
	<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	libc-alpha <libc-alpha-9JcytcrH/bA+uJoB2kUjGw@public.gmane.org>,
	linux-man <linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: The time(2) man page conflicts with glibc
Date: Wed, 16 Dec 2015 17:51:51 -0500	[thread overview]
Message-ID: <CAKCAbMhpuUyNK6PNt5QKsCrwUn-KQ1ARnYCpuXbu-43bcfRu7Q@mail.gmail.com> (raw)
In-Reply-To: <20151216224432.GK238-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>

On Wed, Dec 16, 2015 at 5:44 PM, Rich Felker <dalias-8zAoT0mYgF4@public.gmane.org> wrote:
> On Wed, Dec 16, 2015 at 05:27:03PM -0500, Zack Weinberg wrote:
>> > The kernel is not causing SIGSEGV as far as I can tell; it's purely
>> > the library function time that's causing this.
>>
>> .... Do you consider the vDSO to be part of the kernel, or part of the C library?
>
> The vdso is library code provided by the kernel, but there's no
> fundamental reason to expect it to behave identically to the system
> call. Applications making the system call themselves directly will
> never end up calling the vdso code, so it doesn't matter if its
> behavior in corner cases like this is the same as the syscall.

OK.  I'm just asking because the segfault happens inside the vDSO, or
anyway that's what it looks like from the debugger.

(I don't have a problem with keeping everything the way it is
behavior-wise, for the record.)

zw
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  parent reply	other threads:[~2015-12-16 22:51 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-15 13:58 The time(2) man page conflicts with glibc H.J. Lu
2015-12-15 14:14 ` Zack Weinberg
     [not found]   ` <CAKCAbMj-X+wLKX3=MDm9z3L9zyikemxCNggu2bfw6=o6K5PGgg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-15 14:31     ` Andreas Schwab
2015-12-15 14:55     ` Mike Frysinger
     [not found]       ` <20151215145517.GR11489-UgUKS2FnFs9+urZeOPWqwQ@public.gmane.org>
2015-12-15 15:19         ` Zack Weinberg
     [not found]           ` <CAKCAbMh2ysZPQe3oOSjcPsx1_pcnCAQ6yf+gMbv6iDmvfnGXZA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-15 18:38             ` Mike Frysinger
2015-12-16  7:08               ` Rich Felker
     [not found]                 ` <20151216070839.GE238-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-12-16 20:34                   ` Mike Frysinger
     [not found]                     ` <20151216203432.GR11489-UgUKS2FnFs9+urZeOPWqwQ@public.gmane.org>
2015-12-16 21:59                       ` Rich Felker
     [not found]                         ` <20151216215955.GJ238-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-12-16 22:27                           ` Zack Weinberg
2015-12-16 22:44                             ` Rich Felker
     [not found]                               ` <20151216224432.GK238-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-12-16 22:51                                 ` Zack Weinberg [this message]
2015-12-17  3:15                           ` Mike Frysinger
     [not found] ` <CAMe9rOoJLk8VzyJKmkOvbmBxhCj4mVA2huYtHJsdxpatbkgJ1g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-15 14:16   ` Andreas Schwab
     [not found]     ` <mvmegen94qs.fsf-8jEJWzg51KSXcDkGTvBoYw@public.gmane.org>
2015-12-15 14:17       ` H.J. Lu
2015-12-16 13:38         ` Michael Kerrisk (man-pages)
     [not found]           ` <5671696B.3070203-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-12-16 13:53             ` H.J. Lu
     [not found]               ` <CAMe9rOqsxCEia7OWqzJ-HzZWCra5BTyYqt4japjZTw0pY=fugw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-16 14:07                 ` Michael Kerrisk (man-pages)
     [not found]                   ` <56717032.7000007-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-12-16 14:50                     ` Zack Weinberg
     [not found]                       ` <CAKCAbMjrKfsT7P=Q=+1zWC68552aK=ciod0HYk3=HWMvkYW26w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-12-16 15:04                         ` Michael Kerrisk (man-pages)
2015-12-16 23:05                       ` Paul Eggert
     [not found]                         ` <5671EE36.1000402-764C0pRuGfqVc3sceRu5cw@public.gmane.org>
2015-12-17  5:53                           ` Michael Kerrisk (man-pages)

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