diff options
Diffstat (limited to 'arch/um/kernel/sysrq.c')
| -rw-r--r-- | arch/um/kernel/sysrq.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/arch/um/kernel/sysrq.c b/arch/um/kernel/sysrq.c index e630438f9e73..f80850091e79 100644 --- a/arch/um/kernel/sysrq.c +++ b/arch/um/kernel/sysrq.c @@ -3,6 +3,7 @@ * Licensed under the GPL */ +#include "linux/config.h" #include "linux/sched.h" #include "linux/kernel.h" #include "linux/module.h" @@ -12,14 +13,14 @@ #include "sysrq.h" #include "user_util.h" -void show_trace(unsigned long * stack) +/* Catch non-i386 SUBARCH's. */ +#if !defined(CONFIG_UML_X86) || defined(CONFIG_64BIT) +void show_trace(struct task_struct *task, unsigned long * stack) { - /* XXX: Copy the CONFIG_FRAME_POINTER stack-walking backtrace from - * arch/i386/kernel/traps.c, and then move this to sys-i386/sysrq.c.*/ unsigned long addr; if (!stack) { - stack = (unsigned long*) &stack; + stack = (unsigned long*) &stack; WARN_ON(1); } @@ -35,6 +36,7 @@ void show_trace(unsigned long * stack) } printk("\n"); } +#endif /* * stack dumps generator - this is used by arch-independent code. @@ -44,7 +46,7 @@ void dump_stack(void) { unsigned long stack; - show_trace(&stack); + show_trace(current, &stack); } EXPORT_SYMBOL(dump_stack); @@ -59,7 +61,11 @@ void show_stack(struct task_struct *task, unsigned long *esp) int i; if (esp == NULL) { - if (task != current) { + if (task != current && task != NULL) { + /* XXX: Isn't this bogus? I.e. isn't this the + * *userspace* stack of this task? If not so, use this + * even when task == current (as in i386). + */ esp = (unsigned long *) KSTK_ESP(task); /* Which one? No actual difference - just coding style.*/ //esp = (unsigned long *) PT_REGS_IP(&task->thread.regs); @@ -77,5 +83,6 @@ void show_stack(struct task_struct *task, unsigned long *esp) printk("%08lx ", *stack++); } - show_trace(esp); + printk("Call Trace: \n"); + show_trace(current, esp); } |