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From: Rob Landley <rob@landley.net>
To: Rich Felker <dalias@libc.org>, Greg Ungerer <gerg@linux-m68k.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Russell King - ARM Linux admin <linux@armlinux.org.uk>,
Jann Horn <jannh@google.com>, Nicolas Pitre <nico@fluxnic.net>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
"Eric W . Biederman" <ebiederm@xmission.com>,
Oleg Nesterov <oleg@redhat.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Mark Salter <msalter@redhat.com>,
Aurelien Jacquiot <jacquiot.aurelien@gmail.com>,
linux-c6x-dev@linux-c6x.org,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Linux-sh list <linux-sh@vger.kernel.org>
Subject: Re: [PATCH v2 0/5] Fix ELF / FDPIC ELF core dumping, and use mmap_sem properly in there
Date: Thu, 30 Apr 2020 16:13:10 -0500 [thread overview]
Message-ID: <34688b36-4fdf-0c71-77cc-f98e6b9962df@landley.net> (raw)
In-Reply-To: <20200430145123.GE21576@brightrain.aerifal.cx>
On 4/30/20 9:51 AM, Rich Felker wrote:
> This sounds correct. My understanding of FLAT shared library support
> is that it's really bad and based on having preassigned slot indices
> for each library on the system, and a global array per-process to give
> to data base address for each library. Libraries are compiled to know
> their own slot numbers so that they just load from fixed_reg[slot_id]
> to get what's effectively their GOT pointer.
>
> I'm not sure if anybody has actually used this in over a decade. Last
> time I looked the tooling appeared broken, but in this domain lots of
> users have forked private tooling that's not publicly available or at
> least not publicly indexed, so it's hard to say for sure.
Lots of people in this area are also still using 10 year old tools because it
breaks every time they upgrade.
Heck, nommu support for architectures musl doesn't support yet is _explicitly_
the main thing keeping uClibc alive:
https://www.openwall.com/lists/musl/2015/05/30/1
Rob
next prev parent reply other threads:[~2020-04-30 21:07 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-29 21:49 [PATCH v2 0/5] Fix ELF / FDPIC ELF core dumping, and use mmap_sem properly in there Jann Horn
2020-04-29 21:49 ` [PATCH v2 1/5] binfmt_elf_fdpic: Stop using dump_emit() on user pointers on !MMU Jann Horn
2020-05-05 10:48 ` Christoph Hellwig
2020-05-05 11:42 ` Jann Horn
2020-05-05 12:15 ` Christoph Hellwig
2020-08-11 3:05 ` Jann Horn
2020-04-29 21:49 ` [PATCH v2 2/5] coredump: Let dump_emit() bail out on short writes Jann Horn
2020-04-29 21:49 ` [PATCH v2 3/5] coredump: Refactor page range dumping into common helper Jann Horn
2020-05-05 10:50 ` Christoph Hellwig
2020-05-05 11:44 ` Jann Horn
2020-04-29 21:49 ` [PATCH v2 4/5] binfmt_elf, binfmt_elf_fdpic: Use a VMA list snapshot Jann Horn
2020-05-05 11:03 ` Christoph Hellwig
2020-05-05 12:11 ` Jann Horn
2020-04-29 21:49 ` [PATCH v2 5/5] mm/gup: Take mmap_sem in get_dump_page() Jann Horn
2020-04-29 21:56 ` [PATCH v2 0/5] Fix ELF / FDPIC ELF core dumping, and use mmap_sem properly in there Russell King - ARM Linux admin
2020-04-29 23:03 ` Linus Torvalds
2020-04-30 1:27 ` Nicolas Pitre
2020-04-30 14:10 ` Greg Ungerer
2020-04-30 14:51 ` Rich Felker
2020-04-30 21:13 ` Rob Landley [this message]
2020-05-01 6:00 ` Greg Ungerer
2020-05-01 19:09 ` Rob Landley
2020-04-30 16:54 ` Linus Torvalds
2020-04-30 19:07 ` Eric W. Biederman
2020-05-01 5:44 ` Greg Ungerer
2020-05-01 11:13 ` Eric W. Biederman
2020-05-01 7:14 ` Greg Ungerer
2020-04-30 1:59 ` Nicolas Pitre
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