Hi Dave
I tried the irq command on an ARM vmcore file with a fairly new kernel (3.4.0) and it did not work.
crash> irq
irq: cannot determine number of IRQs
The problem is in arm.c
if (symbol_exists("irq_desc"))
ARRAY_LENGTH_INIT(machdep->nr_irqs, irq_desc,
"irq_desc", NULL, 0);
as the symbol irq_desc does not exist any longer. Looking at x86_64.c I changed this to
if (symbol_exists("irq_desc"))
ARRAY_LENGTH_INIT(machdep->nr_irqs, irq_desc,
"irq_desc", NULL, 0);
else if (kernel_symbol_exists("nr_irqs"))
get_symbol_data("nr_irqs", sizeof(unsigned int),
&machdep->nr_irqs);
and then the command worked as it should again.
Jan
