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Re: gdb and PIE binaries

From: Brent W. Baccala
Subject: Re: gdb and PIE binaries
Date: Tue, 22 Nov 2016 16:06:18 -1000

On Fri, Nov 11, 2016 at 7:17 AM, Samuel Thibault <samuel.thibault@gnu.org> wrote:

Debian is pushing more and more PIE builds, so that address
randomization can be done. However, on GNU/Hurd, gdb can't work with
core files from processes running PIE programs, so one has to pass
CFLAGS=-no-pie etc. to be able to debug programs, it'll become more and
more problematic.

I've found that I can't even debug PIE executables with gdb, let alone core files.

I encountered this problem when trying to debug gdb on itself.  Downloading the gdb source tree and building it with "dpkg-buildpackage -b" produced a PIE executable that I couldn't set breakpoints on properly.  The Debian /usr/bin/gdb, though, is not PIE, which makes me wonder if someone (Samuel?) is compiling our Debian packages without PIE, to avoid this problem.


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