diff options
Diffstat (limited to 'arch/i386/kernel/traps.c')
| -rw-r--r-- | arch/i386/kernel/traps.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c index 313ac1f7dc5..021f8fdc751 100644 --- a/arch/i386/kernel/traps.c +++ b/arch/i386/kernel/traps.c @@ -187,10 +187,21 @@ static void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, if (unwind_init_blocked(&info, task) == 0) unw_ret = show_trace_unwind(&info, log_lvl); } - if (unw_ret > 0) { - if (call_trace > 0) + if (unw_ret > 0 && !arch_unw_user_mode(&info)) { +#ifdef CONFIG_STACK_UNWIND + print_symbol("DWARF2 unwinder stuck at %s\n", + UNW_PC(&info)); + if (call_trace == 1) { + printk("Leftover inexact backtrace:\n"); + if (UNW_SP(&info)) + stack = (void *)UNW_SP(&info); + } else if (call_trace > 1) return; - printk("%sLegacy call trace:\n", log_lvl); + else + printk("Full inexact backtrace again:\n"); +#else + printk("Inexact backtrace:\n"); +#endif } } @@ -1238,8 +1249,10 @@ static int __init call_trace_setup(char *s) call_trace = -1; else if (strcmp(s, "both") == 0) call_trace = 0; - else if (strcmp(s, "new") == 0) + else if (strcmp(s, "newfallback") == 0) call_trace = 1; + else if (strcmp(s, "new") == 2) + call_trace = 2; return 1; } __setup("call_trace=", call_trace_setup); |