Date: Thu, 19 May 2005 10:36:17 -0400 (EDT)
From: "Richard B. Johnson" <linux-os@analogic.com>
Reply-To: linux-os@analogic.com
To: Steven Rostedt <rostedt@goodmis.org>
cc: Andreas Schwab <schwab@suse.de>, linux-kernel@vger.kernel.org,
       "Gilbert, John" <JGG@dolby.com>, Kyle Moffett <mrmacman_g4@mac.com>,
       Adrian Bunk <bunk@stusta.de>, Arjan van de Ven <arjan@infradead.org>,
       "Maciej W. Rozycki" <macro@linux-mips.org>
Subject: Re: Illegal use of reserved word in system.h
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On Thu, 19 May 2005, Steven Rostedt wrote:

> On Thu, 2005-05-19 at 16:06 +0200, Andreas Schwab wrote:
>> "Richard B. Johnson" <linux-os@analogic.com> writes:
>>
>>> Now, where is that 'auxiliary vevtor'??? I got a pointer to
>>> something to be executed before calling exit, I have an
>>> argument count, then a bunch of pointers (argv), terminating
>>> with a NULL, then another bunch of pointers (envp) terminating
>>> with a NULL.  Is there something after that??? If so, what's
>>> the contents of this thing?
>>
>> See create_elf_tables.  The aux table comes after the environment.
>
> As I stated earlier, the page size passed in there is ELF_EXEC_PAGESIZE
> which may not be the same as PAGE_SIZE.
>
> -- Steve

It's also hard to see what is happening in 'C'. When I execute
this:

#include <stdio.h>
#include <stdlib.h>

int main(int cnt, char *argv[], char *env[], char *aux[])
{
     printf("Aux 0 = %s\n", aux[0]);
//    printf("Aux 1 = %s\n", aux[1]);
}

I get:

Aux 0 = GLIBC_2.0

The next pointer is a NULL pointer, so 'C' has dorked something.
When I play in assembler, (crt.o startup) I get a pointer that
points to:

 	bffffb6c	- pointer of the stack
 	00000020	- dereferenced

This shows that ld-linux.so, that got called first, didn't
preserve the vector.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.11.9 on an i686 machine (5537.79 BogoMips).
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