From: Shiz <hi@shiz.me>
To: musl@lists.openwall.com
Subject: Re: ldd not working on ET_EXEC executables
Date: Fri, 9 Dec 2016 01:05:35 +0100 [thread overview]
Message-ID: <5205ADA4-28EB-4285-BD8F-72D81A8E2B27@shiz.me> (raw)
In-Reply-To: <20161208224121.GP1555@brightrain.aerifal.cx>
> On 8 Dec 2016, at 23:41, Rich Felker <dalias@libc.org> wrote:
>
> On Thu, Dec 08, 2016 at 04:30:42PM -0600, Laine Gholson wrote:
>> You mean RANDMMAP? PaX's RANDMMAP feature ignoring the address your requesting it (without MAP_FIXED) is perfectly valid, to quote POSIX:
>> "When MAP_FIXED is not set, the implementation uses addr in an implementation-defined manner to arrive at pa."
>> mmap2(0x10000, 73728, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x1234abcd
>
> It's _valid_, but it's a bad implementation choice; it makes it
> impossible to request a particular range, which is necessary for
> ldso/ldd to load non-PIE programs.
Good. Position-dependent executables should not be used or supported.
- Shiz
prev parent reply other threads:[~2016-12-09 0:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-06 1:39 Laine Gholson
2016-12-06 2:33 ` Rich Felker
2016-12-08 22:30 ` Laine Gholson
2016-12-08 22:41 ` Rich Felker
2016-12-09 0:05 ` Shiz [this message]
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