On Fri, Jun 17, 2011 at 11:53:21PM +0100, Paul Brook wrote:
There is still going to be a small cost even in hardware fixup so this
is very much worth solving despite it's becoming invisible because the
chips are hiding / solving it already.
But I believe that h/w feature is turned
On Sat, Jun 18, 2011 at 03:17:59PM -0400, Nicolas Pitre wrote:
On Sat, 18 Jun 2011, Arnaud Patard wrote:
Dave Martin dave.mar...@linaro.org writes:
Hi,
Hi all,
I've recently become aware that a few packages are causing alignment
faults on ARM, and are relying on the alignment
On Friday 17 June 2011, Nicolas Pitre wrote:
On Fri, 17 Jun 2011, Arnd Bergmann wrote:
On Friday 17 June 2011 14:10:11 Dave Martin wrote:
As part of the general effort to make open source on ARM better, I think
it would be great if we can disable the alignment fixups (or at least
On Fri, Jun 17, 2011 at 01:10:11PM +0100, Dave Martin wrote:
For ARM, we can achieve the goal by augmenting the default kernel command-
line options: either
alignment=3
Fix up each alingment fault, but also log the faulting address
and name of the offending process to
On 06/17/2011 11:53 PM, Somebody in the thread at some point said:
Hi -
int main(int argc, char * argv[])
{
char buf[8];
void *v =buf[1];
unsigned int *p = (unsigned int *)v;
This does not (reliably) do what you expect. The compiler need not align buf.
What?
On Sat, 18 Jun 2011, Nicolas Pitre wrote:
int main(int argc, char * argv[])
{
char buf[8];
void *v = buf[1];
unsigned int *p = (unsigned int *)v;
strcpy(buf, abcdefg);
printf(*%p = 0x%08x\n, p, *p);
return 0;
}
Obviously, there is a buffer overflow
Hi all,
I've recently become aware that a few packages are causing alignment
faults on ARM, and are relying on the alignment fixup emulation code in
the kernel in order to work.
Such faults are very expensive in terms of CPU cycles, and can generally
only result from wrong code (for example,
On Fri, 17 Jun 2011, Arnd Bergmann wrote:
On Friday 17 June 2011 14:10:11 Dave Martin wrote:
As part of the general effort to make open source on ARM better, I think
it would be great if we can disable the alignment fixups (or at least
enable logging) and work with upstreams to get the
On Fri, 17 Jun 2011, Paul Brook wrote:
There is still going to be a small cost even in hardware fixup so this
is very much worth solving despite it's becoming invisible because the
chips are hiding / solving it already.
But I believe that h/w feature is turned off in Linux by
