Re: pkg/53319: text relocations fixes for multimedia/mplayer others

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

The following reply was made to PR pkg/53319; it has been noted by GNATS.

From: "John D. Baker" <jdbaker%mylinuxisp.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: pkg/53319: text relocations fixes for multimedia/mplayer others
Date: Fri, 29 Jun 2018 16:54:54 -0500 (CDT)

 On Fri, 29 Jun 2018, John D. Baker wrote:
 
 >   1541      1 mplayer  write(0x2, 0xbfb619ec, 0x19) = 25
 >        "mplayer: text relocations"
 >   1541      1 mplayer  write(0x2, 0xbac88872, 0x1) = 1
 >        "\n"
 >   1541      1 mplayer  mprotect(0x26000, 0x2c9000, 0x3) Err#13 EACCES
 >   1541      1 mplayer  write(0x2, 0xbfb61a00, 0x3c) = 60
 >        "mplayer: Cannot write-enable text segment: Permission denied"
 >   1541      1 mplayer  write(0x2, 0xbac88872, 0x1) = 1
 >        "\n"
 >   1541      1 mplayer  exit(0x1)
 > 
 > which seems to indicate an issue with "/lib/libcrypt.so.1", or that
 > something wants to mmap it writable...
 
 Nothing to do with libcrypt.so.1.  It would help if I'd read the manual
 pages for the system calls involved.
 
 So, mprotect() is being called with prot=3 (-wx) for a region of memory
 at 0x26000.
 
 Looking earlier in the 'ktruss' output shows several instances of "26000".
 Two are the requsted length for mmap()ing "/usr/lib/libexpat.so.2" and
 "/usr/X11R7/lib/libxcb.so.2", respectively.  Another is a byte offset
 into "/usr/lib/liblzma.so.2" to be mmap()ed.  The rest are tails of
 longer addresses either requested of or returned by mmap().
 
 Not sure what it's doing, then.
 
 -- 
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