It is often useful to see the instruction that caused an unhandled
exception.
Signed-off-by: Anton Blanchard <an...@samba.org>
---
We print all ones if the get_user fails, do we want to go to
the added effort of printing XXXXXXXX like we do in the oops
code?
Index: b/arch/powerpc/kernel/traps.c
===================================================================
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -242,9 +242,9 @@ void _exception(int signr, struct pt_reg
{
siginfo_t info;
const char fmt32[] = KERN_INFO "%s[%d]: unhandled signal %d " \
- "at %08lx nip %08lx lr %08lx code %x\n";
+ "at %08lx nip %08lx lr %08lx code %x insn %08x\n";
const char fmt64[] = KERN_INFO "%s[%d]: unhandled signal %d " \
- "at %016lx nip %016lx lr %016lx code %x\n";
+ "at %016lx nip %016lx lr %016lx code %x insn %08x\n";
if (!user_mode(regs)) {
die("Exception in kernel mode", regs, signr);
@@ -252,9 +252,14 @@ void _exception(int signr, struct pt_reg
}
if (show_unhandled_signals && unhandled_signal(current, signr)) {
+ u32 insn;
+
+ if (get_user(insn, (u32 __user *)(regs->nip)))
+ insn = 0xffffffff;
+
printk_ratelimited(regs->msr & MSR_64BIT ? fmt64 : fmt32,
current->comm, current->pid, signr,
- addr, regs->nip, regs->link, code);
+ addr, regs->nip, regs->link, code, insn);
}
if (arch_irqs_disabled() && !arch_irq_disabled_regs(regs))
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