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Date: Sun, 24 Jan 2021 13:10:36 -0500
From: Rich Felker <dalias@...c.org>
To: Alexander Monakov <amonakov@...ras.ru>
Cc: musl@...ts.openwall.com, Andrew Rogers <andrew.rogerstech@...il.com>
Subject: Re: Potential DL_NOMMU_SUPPORT bug.
On Sun, Jan 24, 2021 at 06:58:10PM +0300, Alexander Monakov wrote:
> On Sun, 24 Jan 2021, Rich Felker wrote:
>
> > Could you clarify what you're trying to do? Android devices are not
> > nommu and loading the binary from SD card vs elsewhere should not be
> > relevant to mmap failure here.
>
> sdcard [pseudo-]partition is usually mounted noexec, so mmap with PROT_EXEC
> should fail.
Uhg, that makes no sense. Does it enforce that even for MAP_PRIVATE,
which should semantically be equivalent to just making anon memory
with the requested permissions and copying the file contents into it??
Rich
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