Subject: Re: Illegal use of reserved word in system.h
From: Steven Rostedt <rostedt@goodmis.org>
To: Andreas Schwab <schwab@suse.de>
Cc: linux-os@analogic.com, 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>
In-Reply-To: <je64xf450i.fsf@sykes.suse.de>
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Organization: Kihon Technologies
Date: Thu, 19 May 2005 11:56:33 -0400
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On Thu, 2005-05-19 at 17:19 +0200, Andreas Schwab wrote:
> "Richard B. Johnson" <linux-os@analogic.com> writes:
> 
> > 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]);
> > }
> 
> There is no pointer to the aux table passed to main, you have to skip past
> the environment.  Also, the aux table is an array of key/value pairs.
> 
> > This shows that ld-linux.so, that got called first, didn't
> > preserve the vector.
> 
> It does.
> 

Here's a simple program to show you your pages size ;-), Now I don't
know enough about the elfinfo size and such to make this a real program,
but it should at least prove a point!

#include <stdio.h>

int main(int argc, char **argv, char **env)
{
        int i;
        long *p;

        for (i=0; env[i]; i++);
        p = (long*)(&env[i+1]);
        for (i=0; i < 10; i++) {
                long type = *p++;
                if (type == 6)
                        printf("pagesz = 0x%lx (%ld)\n",*p,*p);
                p++;
        }

        return 0;
}

-- Steve


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