Re: [linuxsh-dev] Re: bad alignment fixup

[David M. <Dav...@st...>]

On Nov 23,  2:57pm, pr...@pa... wrote:
> Subject: Re: [linuxsh-dev] Re: bad alignment fixup
>
> On Thu, Nov 23, 2000 at 02:28:57PM +0000, David Howells wrote:
> >
> > > and adds unaligned userspace access emulation, which I still think is a
> > > terribly bad idea;
> >
> > insmod can do this a lot.
>
> fix insmod.  it seems to work on other architectures that don't support
> unaligned accesses.

What version of insmod are you using? I've used it a fair bit here, and have
seen no problems with it. We are using 2.3.16 plus a few superH specific
patches. Is the problem being caused by loading a specific module?

I'm also not keen on having the kernel fix up unaligned accesses for me, as
if I have a bug in my program I want to know about it. Much of the software
I work with has to run under different OSes and processors, some of which
silently truncate the bottom bits when you do unaligned accesses! This is
not a fun bug to try to track down.

The fact that the i386 handles unaligned accesses for you is the exception
rather than the rule.

I think the Alpha port does a printk if a program does this, so at least you
know about it. Of course, it only does it for the first few, otherwise it
would be terribly slow.

Cheers!





-- 
Dave McKay 
Software Engineer STMicroelectronics
Email: dav...@st...