Commit 0de2d820 authored Sep 28, 2007 by Scott Wood Committed by Paul Mackerras Oct 03, 2007

[POWERPC] Make instruction dumping work in real mode



On non-book-E, 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 whether instruction address translation is turned
on, and if not converts PC into a virtual address.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

parent 3eb523b9

arch/powerpc/kernel/process.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -354,6 +354,14 @@ static void show_instructions(struct pt_regs *regs)
		if (!(i % 8))
		printk("\n");

		#if !defined(CONFIG_BOOKE)
		/* 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.