diff options
Diffstat (limited to 'arch/arm/kernel/traps.c')
| -rw-r--r-- | arch/arm/kernel/traps.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 24095601359b..ba1c1884e68e 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -45,7 +45,18 @@ static int __init user_debug_setup(char *str) __setup("user_debug=", user_debug_setup); #endif -void dump_backtrace_entry(unsigned long where, unsigned long from) +static void dump_mem(const char *str, unsigned long bottom, unsigned long top); + +static inline int in_exception_text(unsigned long ptr) +{ + extern char __exception_text_start[]; + extern char __exception_text_end[]; + + return ptr >= (unsigned long)&__exception_text_start && + ptr < (unsigned long)&__exception_text_end; +} + +void dump_backtrace_entry(unsigned long where, unsigned long from, unsigned long frame) { #ifdef CONFIG_KALLSYMS printk("[<%08lx>] ", where); @@ -55,6 +66,9 @@ void dump_backtrace_entry(unsigned long where, unsigned long from) #else printk("Function entered at [<%08lx>] from [<%08lx>]\n", where, from); #endif + + if (in_exception_text(where)) + dump_mem("Exception stack", frame + 4, frame + 4 + sizeof(struct pt_regs)); } /* @@ -266,7 +280,7 @@ void unregister_undef_hook(struct undef_hook *hook) spin_unlock_irqrestore(&undef_lock, flags); } -asmlinkage void do_undefinstr(struct pt_regs *regs) +asmlinkage void __exception do_undefinstr(struct pt_regs *regs) { unsigned int correction = thumb_mode(regs) ? 2 : 4; unsigned int instr; |