[PATCH] i386: Do backtrace fallback too
Similar patch to earlier x86-64 patch. When the dwarf2 unwinder fails dump the left over stack with the old unwinder. Also some clarifications in the headers. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -187,10 +187,21 @@ static void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
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if (unwind_init_blocked(&info, task) == 0)
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if (unwind_init_blocked(&info, task) == 0)
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unw_ret = show_trace_unwind(&info, log_lvl);
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unw_ret = show_trace_unwind(&info, log_lvl);
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}
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}
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if (unw_ret > 0) {
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if (unw_ret > 0 && !arch_unw_user_mode(&info)) {
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if (call_trace > 0)
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#ifdef CONFIG_STACK_UNWIND
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print_symbol("DWARF2 unwinder stuck at %s\n",
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UNW_PC(info.regs));
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if (call_trace == 1) {
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printk("Leftover inexact backtrace:\n");
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if (UNW_SP(info.regs))
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stack = (void *)UNW_SP(info.regs);
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} else if (call_trace > 1)
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return;
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return;
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printk("%sLegacy call trace:\n", log_lvl);
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else
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printk("Full inexact backtrace again:\n");
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#else
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printk("Inexact backtrace:\n");
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#endif
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}
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}
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}
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}
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