From: Daniel Jacobowitz <dmj+@andrew.cmu.edu>
To: Alexandre.Nikolaev@matrox.com
Cc: linuxppc-dev@lists.linuxppc.org
Subject: Re: who loads argc in elf binary???????
Date: Wed, 7 Mar 2001 14:10:14 -0500 [thread overview]
Message-ID: <20010307141014.A28040@nevyn.them.org> (raw)
In-Reply-To: <3AA50A43.FA070FDE@matrox.com>; from anikolae@matrox.com on Tue, Mar 06, 2001 at 11:03:15AM -0500
On Tue, Mar 06, 2001 at 11:03:15AM -0500, Alexandre Nikolaev wrote:
>
> Hi!
>
> We are trying montavista kernel .4 on G4. Upon starting of ELF binary,
> the r3, which should contain argc, always reads 0 (for any program). r4
> is ok.
> What could be the problem?
> Who is responsible for loading r3?
>
> I would really appreciate if someone can help!
argc and argv are created by the kernel, based on what is given in
exec(). It has to go through the dynamic loader and any start code
before it gets to main, though. Are you using any custom crt* code, or
otherwise linking oddly? If so, look there.
I also seem to recall that the arguments are loaded into registers by
the application, off the stack. I'm not entirely sure of that, though.
--
Daniel Jacobowitz Debian GNU/Linux Developer
Monta Vista Software Debian Security Team
"I am croutons!"
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-03-07 19:10 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-06 16:03 who loads argc in elf binary??????? Alexandre Nikolaev
2001-03-07 19:10 ` Daniel Jacobowitz [this message]
2001-03-07 19:15 ` David Edelsohn
-- strict thread matches above, loose matches on Subject: below --
2001-12-04 16:13 Changes to PPC Linux required for GCC 3.1 Corey Minyard
2001-12-04 16:16 ` David Edelsohn
2001-12-04 16:39 ` Corey Minyard
2001-12-05 12:55 ` Franz Sirl
2001-12-05 16:18 ` Corey Minyard
2001-12-05 17:37 ` Tom Rini
2001-12-05 17:50 ` Benjamin Herrenschmidt
2001-12-05 19:45 ` Tom Rini
2001-12-05 20:30 ` Franz Sirl
2001-12-07 13:01 ` Gabriel Paubert
2001-12-07 20:57 ` AltiVec register ptrace support Kumar Gala
2001-12-07 22:23 ` Kevin Buettner
2001-12-07 22:34 ` Daniel Jacobowitz
2001-12-14 18:52 ` Kumar Gala
2001-12-14 19:16 ` Jason R Thorpe
2001-12-15 2:08 ` Andrew Cagney
2001-12-15 17:44 ` Kumar Gala
2001-12-16 21:11 ` Paul Mackerras
2002-01-10 18:58 ` Kumar Gala
2001-12-05 21:59 ` Changes to PPC Linux required for GCC 3.1 Paul Mackerras
2001-12-05 20:17 ` Daniel Jacobowitz
2001-12-05 20:20 ` David Edelsohn
2001-12-05 20:30 ` Franz Sirl
2001-12-06 0:59 ` Corey Minyard
2001-12-06 3:38 ` Tom Rini
2001-12-07 5:22 ` Corey Minyard
2001-12-05 20:51 ` Franz Sirl
2001-12-06 1:41 ` Corey Minyard
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