From: Daniel Jacobowitz <drow@false.org>
To: Aleksandar Ristovski <aristovski@qnx.com>
Cc: gdb-patches@sources.redhat.com
Subject: Re: [patch] nto target: fix null pointer dereference
Date: Tue, 12 Aug 2008 21:32:00 -0000 [thread overview]
Message-ID: <20080812213207.GA30766@caradoc.them.org> (raw)
In-Reply-To: <48A1FFD4.1080109@qnx.com>
On Tue, Aug 12, 2008 at 05:25:40PM -0400, Aleksandar Ristovski wrote:
> in procfs_create_inferior we call solib_create_inferior_hook, which will end up trying to determine loader base by reading inferior's memory at DT_DEBUG pointer. In our case, before the executable actually started executing, it will successfully read 0s, because dynamic loader has not been invoked yet, and the pointer to r_debug structure is not initialized.
It should already detect that zero is invalid, since that's the same
value used initially; see e.g. calls to locate_base. Where's the read
come from?
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2008-08-12 21:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-12 18:33 Ulrich Weigand
2008-08-12 21:26 ` Aleksandar Ristovski
2008-08-12 21:32 ` Daniel Jacobowitz [this message]
2008-08-13 15:47 ` Aleksandar Ristovski
-- strict thread matches above, loose matches on Subject: below --
2008-08-14 20:51 Ulrich Weigand
2008-08-13 13:30 Ulrich Weigand
2008-08-13 15:50 ` Aleksandar Ristovski
2008-08-14 20:46 ` Aleksandar Ristovski
2008-08-12 16:38 Aleksandar Ristovski
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