[PATCH] i386/x86-64: fall back to old-style call trace if no unwinding

If no unwinding is possible at all for a certain exception instance, fall back to the old style call trace instead of not showing any trace at all. Also, allow setting the stack trace mode at the command line.

Jan Beulich committed 20 years ago

Commit c33bd9a1 parent fe7cacc6 files · +83 −45Browse files

Showing the changes to kernel/unwind.c (1 of 6 files). Show all

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kernel/unwind.c+3−4

@@ -885,14 +885,13 @@ EXPORT_SYMBOL(unwind_init_blocked); · 884 unmodified lines
885	885	* Prepare to unwind the currently running thread.
886	886	*/
887	887	int unwind_init_running(struct unwind_frame_info *info,
888		− asmlinkage void (callback)(struct unwind_frame_info ,
889		− void *arg),
	888	+ asmlinkage int (callback)(struct unwind_frame_info ,
	889	+ void *arg),
890	890	void *arg)
891	891	{
892	892	info->task = current;
893		− arch_unwind_init_running(info, callback, arg);
894	893
895		− return 0;
	894	+ return arch_unwind_init_running(info, callback, arg);
896	895	}
897	896	EXPORT_SYMBOL(unwind_init_running);
898	897