From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] executable data segment ?
Date: Sat, 10 May 2003 07:01:48 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590723705720@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590723705718@msgid-missing>
>>>>> On Sat, 10 May 2003 10:00:24 +0530 (IST), CH Gowri Kumar <gkumar@csa.iisc.ernet.in> said:
>> Is there a way in linux on ia64 to execute code in the
>> datasegment ?
> Yes, it is possible to execute code in the data
> segment. The data segment by default is not executable. You
> might have to make it executable using the mprotect system call.
And if you want to be able to get a backtrace through dynamically
generated code, please consider using the dynamic unwind info API of
libunwind (http://www.hpl.hp.com/research/linux/libunwind/). No
man-page yet, I'm afraid, but there is an example in the libunwind
source distribution (tests/ia64-test-dyn1.c) which should make it
obvious how to use this API.
Imagine being about to use gdb to debug your dynamically-generated
code!
--david
prev parent reply other threads:[~2003-05-10 7:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-10 3:11 [Linux-ia64] executable data segment ? Ronald Veldema
2003-05-10 4:42 ` CH Gowri Kumar
2003-05-10 7:01 ` David Mosberger [this message]
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