Hello.
Scott Wood wrote:
> On non-book-E-or-4xx, exceptions execute in real mode. If a fault happens
> that leads to a register dump, the kernel currently prints XXXXXXXX because
> it doesn't realize that PC is a physical address.
> This patch checks the state of the IMMU, and if necessary converts PC into a
> virtual address.
>
> Signed-off-by: Scott Wood <[EMAIL PROTECTED]>
> ---
> Resent with 40x->44x.
>
> arch/powerpc/kernel/process.c | 8 ++++++++
> 1 files changed, 8 insertions(+), 0 deletions(-)
>
> diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
> index 57c589c..6dbde7f 100644
> --- a/arch/powerpc/kernel/process.c
> +++ b/arch/powerpc/kernel/process.c
> @@ -354,6 +354,14 @@ static void show_instructions(struct pt_regs *regs)
> if (!(i % 8))
> printk("\n");
>
> +#if !defined(CONFIG_BOOKE) && !defined(CONFIG_44x)
Doesn't CONFIG_44x select CONFIG_BOOKE? Maybe you meant CONFIG_40x?
> + /* If executing with the IMMU off, adjust pc rather
> + * than print XXXXXXXX.
> + */
> + if (!(regs->msr & MSR_IR))
> + pc = (unsigned long)phys_to_virt(pc);
> +#endif
> +
> /* We use __get_user here *only* to avoid an OOPS on a
> * bad address because the pc *should* only be a
> * kernel address.
WBR, Sergei
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
