From fb0bdec51a4901b7dd088de0a1e365e1b9f5cd21 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Wed, 9 Jan 2019 20:30:07 +0000 Subject: [PATCH] powerpc/8xx: fix setting of pagetable for Abatron BDI debug tool. Commit 8c8c10b90d88 ("powerpc/8xx: fix handling of early NULL pointer dereference") moved the loading of r6 earlier in the code. As some functions are called inbetween, r6 needs to be loaded again with the address of swapper_pg_dir in order to set PTE pointers for the Abatron BDI. Fixes: 8c8c10b90d88 ("powerpc/8xx: fix handling of early NULL pointer dereference") Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/head_8xx.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 57deb1e9ffea..20cc816b3508 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -852,11 +852,12 @@ start_here: /* set up the PTE pointers for the Abatron bdiGDB. */ - tovirt(r6,r6) lis r5, abatron_pteptrs@h ori r5, r5, abatron_pteptrs@l stw r5, 0xf0(0) /* Must match your Abatron config file */ tophys(r5,r5) + lis r6, swapper_pg_dir@h + ori r6, r6, swapper_pg_dir@l stw r6, 0(r5) /* Now turn on the MMU for real! */