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From: Sven Eckelmann <sven.eckelmann@gmx.de>
To: Nathan Wharton <naw@greptar.com>
Cc: b.a.t.m.a.n@open-mesh.net
Subject: Re: [B.A.T.M.A.N.] Debug Malloc Problem
Date: Wed, 27 May 2009 18:16:01 +0200	[thread overview]
Message-ID: <200905271816.04764.sven.eckelmann@gmx.de> (raw)
In-Reply-To: <4313f3060905270720k45859cb5y822c47397482b77c@mail.gmail.com>

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On Wednesday 27 May 2009 16:20:16 Nathan Wharton wrote:
> On Tue, May 26, 2009 at 5:13 PM, Sven Eckelmann <sven.eckelmann@gmx.de> 
wrote:
> > =========================================
> > #include <stdio.h>
> > #include <stdlib.h>
> >
> > #define x_moved(pos) ((int*)&x[pos])[0]
> > static const int value1 = 0x01234567;
> > static const int value2 = 0x89abcdef;
> >
> > int main() {
> >        volatile char *x = (char*)malloc(sizeof(int) * 2);
> >        x_moved(0) = value1;
> >        x_moved(2) = value2;
> >
> >        if (x_moved(2) != value2) {
> >                printf("ERROR Value: ");
> >        } else {
> >                printf("Value: ");
> >        }
> >        printf("%x %x\n", x_moved(0) , x_moved(2));
> >
> >        free(x);
> >        return 0;
> > }
> > =========================================
>
> This results in:
> ERROR Value: 89abcdef cdef89ab
Thanks. This is completely unexpecting for a kernel with alignment trap. The 
expected result is  "Value: 12389ab 89abcdef". Can you check the value of 
/proc/cpu/alignment ? I will look further at it this evening.

Regards,
	Sven

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  parent reply	other threads:[~2009-05-27 16:16 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-26 18:48 [B.A.T.M.A.N.] Debug Malloc Problem Nathan Wharton
2009-05-26 18:50 ` Nathan Wharton
2009-05-26 22:13   ` Sven Eckelmann
2009-05-27  0:06     ` Nathan Wharton
2009-05-27  9:28       ` Marek Lindner
2009-05-27 14:20     ` Nathan Wharton
2009-05-27 16:07       ` Nathan Wharton
2009-05-27 16:16       ` Sven Eckelmann [this message]
2009-05-27 16:21         ` Nathan Wharton
2009-05-27 16:35           ` Nathan Wharton
2009-05-27 17:13             ` Sven Eckelmann
2009-05-27 17:21               ` Nathan Wharton

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