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From: Luke Diamand <luke@diamand.org>
To: elfutils-devel@sourceware.org
Cc: Roland McGrath <roland@hack.frob.com>
Subject: dwfl_link_map_report() on a core file with sysroot? Opens the wrong solibs?
Date: Thu, 13 Dec 2018 20:27:00 -0000	[thread overview]
Message-ID: <CAE5ih7_VNLQ4C8GKgt4vZL0CGeCyoxOqsbkfYZhV4QNii2C6Pw@mail.gmail.com> (raw)

I'm trying to get callstacks out of a core file using libdwfl where
the ELF files live in a sysroot (and are from a different
architecture, ARM).

I'm possibly doing something stupid as I find that
dwfl_link_map_report() opens /lib/libpthread.so on the *host* rather
than the libpthread.so from my sysroot. It obviously doesn't then get
very far.

I called elf_begin(), dwfl_begin() and then dwfl_core_file_report(),
passing in the path to the executable (in the sysroot).

There's a comment in link_map.c around line 390 which says:

// XXX hook for sysroot

So inspired by this, I hacked in some code to open files relative to
my sysroot and it all started working.

Am I just missing some obvious setup, or is this just missing sysroot support?

Thanks!
Luke

             reply	other threads:[~2018-12-13 20:27 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-13 20:27 Luke Diamand [this message]
     [not found] ` <CAORpzuOC4yGnrbtYjD=kxhJ-ytfJ0tQ3+iDq1NPZ9g8jenVi0g@mail.gmail.com>
2018-12-14 13:44   ` Luke Diamand
2019-01-06 21:04     ` Mark Wielaard
2019-01-06 22:04       ` Luke Diamand

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