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From: Florian Weimer <fweimer@redhat.com>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: carlos <carlos@redhat.com>,
	Joseph Myers <joseph@codesourcery.com>,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	libc-alpha <libc-alpha@sourceware.org>,
	Thomas Gleixner <tglx@linutronix.de>, Ben Maurer <bmaurer@fb.com>,
	Peter Zijlstra <peterz@infradead.org>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Boqun Feng <boqun.feng@gmail.com>,
	Will Deacon <will.deacon@arm.com>,
	Dave Watson <davejwatson@fb.com>, Paul Turner <pjt@google.com>,
	Rich Felker <dalias@libc.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-api <linux-api@vger.kernel.org>
Subject: Re: [PATCH 1/5] glibc: Perform rseq(2) registration at C startup and thread creation (v10)
Date: Fri, 14 Jun 2019 13:35:51 +0200	[thread overview]
Message-ID: <87tvcsv1pk.fsf@oldenburg2.str.redhat.com> (raw)
In-Reply-To: <1635690189.3049.1560507249693.JavaMail.zimbra@efficios.com> (Mathieu Desnoyers's message of "Fri, 14 Jun 2019 06:14:09 -0400 (EDT)")

* Mathieu Desnoyers:

> * Makefile:
>
> LIBCPATH=/home/efficios/glibc-test/lib
> KERNEL_HEADERS=/home/efficios/git/linux-percpu-dev/usr/include
> CFLAGS=-I${KERNEL_HEADERS} -L${LIBCPATH} -Wl,--rpath=${LIBCPATH} -Wl,--dynamic-linker=${LIBCPATH}/ld-linux-x86-64.so.2
>
> all:
> 	gcc ${CFLAGS} -o a a.c
> 	gcc ${CFLAGS} -shared -fPIC -o s.so s.c

For me, that does not correctly link against the built libc because the
system dynamic loader seeps into the link.

> specifically this commit:
> https://github.com/compudj/glibc-dev/commit/c49a286497d065a7fc00aafd846e6edce14f97fc

This commit links __rseq_handled into libc.so.6 via rseq-sym.c, but does
not export it from there.

Thanks,
Florian

  reply	other threads:[~2019-06-14 11:35 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190503184219.19266-1-mathieu.desnoyers@efficios.com>
2019-05-03 18:42 ` [PATCH 1/5] glibc: Perform rseq(2) registration at C startup and thread creation (v10) Mathieu Desnoyers
2019-05-27 11:19   ` Florian Weimer
2019-05-27 19:27     ` Mathieu Desnoyers
2019-05-29 15:45       ` Mathieu Desnoyers
2019-05-30 20:56         ` Mathieu Desnoyers
2019-05-31  8:06           ` Florian Weimer
2019-05-31 14:48             ` Mathieu Desnoyers
2019-05-31 15:46               ` Florian Weimer
2019-05-31 18:10                 ` Mathieu Desnoyers
2019-06-04 11:46                   ` Florian Weimer
2019-06-04 15:57                     ` Mathieu Desnoyers
2019-06-06 11:57                       ` Florian Weimer
2019-06-10 14:43                         ` Carlos O'Donell
2019-06-12 14:00                           ` Mathieu Desnoyers
2019-06-14 10:03                             ` Mathieu Desnoyers
2019-06-14 10:06                               ` Florian Weimer
2019-06-14 10:14                                 ` Mathieu Desnoyers
2019-06-14 11:35                                   ` Florian Weimer [this message]
2019-06-14 12:55                                     ` Mathieu Desnoyers
2019-06-14 13:01                                       ` Mathieu Desnoyers
2019-06-14 13:09                                         ` Florian Weimer
2019-06-14 13:18                                           ` Mathieu Desnoyers
2019-06-14 13:24                                             ` Florian Weimer
2019-06-14 13:34                                               ` Mathieu Desnoyers
2019-06-14 13:42                                                 ` Florian Weimer
2019-06-14 13:47                                                   ` Mathieu Desnoyers
2019-06-14 13:53                                                     ` Florian Weimer
2019-06-14 13:59                                                       ` Mathieu Desnoyers
2019-06-14 13:29                                         ` David Laight
2019-06-14 13:39                                           ` Mathieu Desnoyers
2019-06-12 14:16                         ` Mathieu Desnoyers
2019-06-12 14:22                           ` Florian Weimer
2019-06-12 14:36                             ` Mathieu Desnoyers
2019-06-12 14:43                               ` Florian Weimer
2019-05-03 18:42 ` [PATCH 2/5] glibc: sched_getcpu(): use rseq cpu_id TLS on Linux (v4) Mathieu Desnoyers

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