From: David Miller <davem@xxxxxxxxxxxxx> Date: Mon, 11 Aug 2008 23:30:13 -0700 (PDT) > The problem is that CONFIG_STACK_DEBUG doesn't understand > the IRQ stacks at all. > > I'll see if I can tweak it to handle this. This patch, on top of my original IRQSTACKS patch for sparc64, seems to get things working for me. diff --git a/arch/sparc64/lib/mcount.S b/arch/sparc64/lib/mcount.S index 9e4534b..24e6a3c 100644 --- a/arch/sparc64/lib/mcount.S +++ b/arch/sparc64/lib/mcount.S @@ -45,11 +45,47 @@ _mcount: sub %g3, STACK_BIAS, %g3 cmp %sp, %g3 bg,pt %xcc, 1f - sethi %hi(panicstring), %g3 + nop +#ifdef CONFIG_IRQSTACKS + lduh [%g6 + TI_CPU], %g1 + sethi %hi(hardirq_stack), %g3 + or %g3, %lo(hardirq_stack), %g3 + sllx %g1, 3, %g1 + ldx [%g3 + %g1], %g7 + sub %g7, STACK_BIAS, %g7 + cmp %sp, %g7 + bleu,pt %xcc, 2f + sethi %hi(THREAD_SIZE), %g3 + add %g7, %g3, %g7 + cmp %sp, %g7 + blu,pn %xcc, 1f +2: sethi %hi(softirq_stack), %g3 + or %g3, %lo(softirq_stack), %g3 + ldx [%g3 + %g1], %g7 + cmp %sp, %g7 + bleu,pt %xcc, 2f + sethi %hi(THREAD_SIZE), %g3 + add %g7, %g3, %g7 + cmp %sp, %g7 + blu,pn %xcc, 1f + nop +#endif + /* If we are already on panic stack, don't hop onto it + * again, we are already trying to output the stack overflow + * message. + */ sethi %hi(ovstack), %g7 ! cant move to panic stack fast enough or %g7, %lo(ovstack), %g7 - add %g7, OVSTACKSIZE, %g7 + add %g7, OVSTACKSIZE, %g3 + sub %g3, STACK_BIAS - 192, %g3 sub %g7, STACK_BIAS, %g7 + cmp %sp, %g7 + blu,pn %xcc, 2f + cmp %sp, %g3 + bleu,pn %xcc, 1f + nop +2: mov %g3, %sp + sethi %hi(panicstring), %g3 mov %g7, %sp call prom_printf or %g3, %lo(panicstring), %o0 -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
