diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 18:20:16 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 18:20:16 +0900 |
| commit | d153ea88dccf003173315b5d21acabebb897fb4a (patch) | |
| tree | 5cdc96ef0ec58026d82c03f76250ac1833f566d4 /arch/sh/kernel/irq.c | |
| parent | 7a440c950efb5cdc8a05cc6c3ec8fc864b60ef77 (diff) | |
sh: stack debugging support.
This adds a DEBUG_STACK_USAGE and DEBUG_STACKOVERFLOW for SH.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/irq.c')
| -rw-r--r-- | arch/sh/kernel/irq.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c index c2e07f7f349..7066611aeb7 100644 --- a/arch/sh/kernel/irq.c +++ b/arch/sh/kernel/irq.c @@ -60,7 +60,6 @@ unlock: } #endif - asmlinkage int do_IRQ(unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7, struct pt_regs regs) @@ -69,6 +68,22 @@ asmlinkage int do_IRQ(unsigned long r4, unsigned long r5, irq_enter(); +#ifdef CONFIG_DEBUG_STACKOVERFLOW + /* Debugging check for stack overflow: is there less than 1KB free? */ + { + long sp; + + __asm__ __volatile__ ("and r15, %0" : + "=r" (sp) : "0" (THREAD_SIZE - 1)); + + if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) { + printk("do_IRQ: stack overflow: %ld\n", + sp - sizeof(struct thread_info)); + dump_stack(); + } + } +#endif + #ifdef CONFIG_CPU_HAS_INTEVT __asm__ __volatile__ ( #ifdef CONFIG_CPU_HAS_SR_RB |