Re: Syscall changes registers beyond %eax, on linux-i386

Richard B. Johnson
2002-09-19T19:10:21Z

On Thu, 19 Sep 2002, Brian Gerst wrote:

> Richard Henderson wrote:
> > On Thu, Sep 19, 2002 at 02:04:43PM -0400, Brian Gerst wrote:
> >
> >>Now that I've thought about it more, I think the best solution is to go
> >>through all the syscalls (a big job, I know), and declare the parameters
> >>as const, so that gcc knows it can't modify them, and will throw a
> >>warning if we try.
> >
> >
> > The parameter area belongs to the callee, and it may *always* be modified.
> >
> >
> > r~
> >
>
> The parameters can not be modified if they are declared const though,
> that's my point.

Yes. A temporary declaration change to compile the kernel and
see where it complains.

Cheers,
Dick Johnson
Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips).
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