diff options
| author | Robin Getz <rgetz@blackfin.uclinux.org> | 2009-01-07 23:14:38 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2009-01-07 23:14:38 +0800 |
| commit | a45d575f53c9ed2926840377e59aa19e2024ee87 (patch) | |
| tree | 0789f43eaee963ea5c4f4f011080b4e36a77c7eb /arch/blackfin/kernel | |
| parent | f768a0eb90831ced2129df6ccba6f1177fa5a0fa (diff) | |
Blackfin arch: Add basic irq stack checking for Blackfin
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/kernel')
| -rw-r--r-- | arch/blackfin/kernel/irqchip.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c index 5ad07525ea3..1624e112968 100644 --- a/arch/blackfin/kernel/irqchip.c +++ b/arch/blackfin/kernel/irqchip.c @@ -120,7 +120,21 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs) desc = &bad_irq_desc; irq_enter(); - +#ifdef CONFIG_DEBUG_STACKOVERFLOW + /* Debugging check for stack overflow: is there less than STACK_WARN free? */ + { + long sp; + + sp = __get_SP() & (THREAD_SIZE-1); + + if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) { + dump_stack(); + printk(KERN_EMERG "%s: possible stack overflow while handling irq %i " + " only %ld bytes free\n", + __func__, irq, sp - sizeof(struct thread_info)); + } + } +#endif generic_handle_irq(irq); /* If we're the only interrupt running (ignoring IRQ15 which is for |