From f82e55babe0f8a0c0d71249298bc8aefb03e9ae8 Mon Sep 17 00:00:00 2001 From: Matt Sealey Date: Thu, 28 Oct 2010 01:53:57 -0500 Subject: [PATCH] ARM 5977/1: Enable backtrace printing on oops when PC is corrupted --- arch/arm/kernel/unwind.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c index dd56e11f339..61e1ce2406f 100644 --- a/arch/arm/kernel/unwind.c +++ b/arch/arm/kernel/unwind.c @@ -347,6 +347,9 @@ void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk) frame.sp = regs->ARM_sp; frame.lr = regs->ARM_lr; frame.pc = regs->ARM_pc; + /* PC might be corrupted, use LR in that case. */ + frame.pc = kernel_text_address(regs->ARM_pc) + ? regs->ARM_pc : regs->ARM_lr; } else if (tsk == current) { frame.fp = (unsigned long)__builtin_frame_address(0); frame.sp = current_sp;