diff options
Diffstat (limited to 'arch/x86/kernel/dumpstack_32.c')
| -rw-r--r-- | arch/x86/kernel/dumpstack_32.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c index 64a59d726639..8e3a8fedfa4d 100644 --- a/arch/x86/kernel/dumpstack_32.c +++ b/arch/x86/kernel/dumpstack_32.c @@ -29,6 +29,9 @@ const char *stack_type_name(enum stack_type type) if (type == STACK_TYPE_ENTRY) return "ENTRY_TRAMPOLINE"; + if (type == STACK_TYPE_EXCEPTION) + return "#DF"; + return NULL; } @@ -82,6 +85,30 @@ static bool in_softirq_stack(unsigned long *stack, struct stack_info *info) return true; } +static bool in_doublefault_stack(unsigned long *stack, struct stack_info *info) +{ +#ifdef CONFIG_DOUBLEFAULT + struct cpu_entry_area *cea = get_cpu_entry_area(raw_smp_processor_id()); + struct doublefault_stack *ss = &cea->doublefault_stack; + + void *begin = ss->stack; + void *end = begin + sizeof(ss->stack); + + if ((void *)stack < begin || (void *)stack >= end) + return false; + + info->type = STACK_TYPE_EXCEPTION; + info->begin = begin; + info->end = end; + info->next_sp = (unsigned long *)this_cpu_read(cpu_tss_rw.x86_tss.sp); + + return true; +#else + return false; +#endif +} + + int get_stack_info(unsigned long *stack, struct task_struct *task, struct stack_info *info, unsigned long *visit_mask) { @@ -105,6 +132,9 @@ int get_stack_info(unsigned long *stack, struct task_struct *task, if (in_softirq_stack(stack, info)) goto recursion_check; + if (in_doublefault_stack(stack, info)) + goto recursion_check; + goto unknown; recursion_check: |