2008-10-22 23:26:29 -06:00
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#ifndef _ASM_X86_KDEBUG_H
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#define _ASM_X86_KDEBUG_H
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2007-10-15 15:28:20 -06:00
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#include <linux/notifier.h>
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struct pt_regs;
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/* Grossly misnamed. */
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enum die_val {
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DIE_OOPS = 1,
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DIE_INT3,
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DIE_DEBUG,
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DIE_PANIC,
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DIE_NMI,
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DIE_DIE,
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DIE_KERNELDEBUG,
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DIE_TRAP,
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DIE_GPF,
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DIE_CALL,
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DIE_PAGE_FAULT,
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2008-02-15 13:55:53 -07:00
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DIE_NMIUNKNOWN,
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2007-10-15 15:28:20 -06:00
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};
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2008-01-30 05:33:07 -07:00
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extern void printk_address(unsigned long address, int reliable);
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2008-03-23 02:02:31 -06:00
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extern void die(const char *, struct pt_regs *,long);
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2008-01-30 05:31:23 -07:00
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extern int __must_check __die(const char *, struct pt_regs *, long);
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2007-10-15 15:28:20 -06:00
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extern void show_registers(struct pt_regs *regs);
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2008-01-30 05:33:07 -07:00
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extern void show_trace(struct task_struct *t, struct pt_regs *regs,
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x86: Eliminate bp argument from the stack tracing routines
The various stack tracing routines take a 'bp' argument in which the
caller is supposed to provide the base pointer to use, or 0 if doesn't
have one. Since bp is garbage whenever CONFIG_FRAME_POINTER is not
defined, this means all callers in principle should either always pass
0, or be conditional on CONFIG_FRAME_POINTER.
However, there are only really three use cases for stack tracing:
(a) Trace the current task, including IRQ stack if any
(b) Trace the current task, but skip IRQ stack
(c) Trace some other task
In all cases, if CONFIG_FRAME_POINTER is not defined, bp should just
be 0. If it _is_ defined, then
- in case (a) bp should be gotten directly from the CPU's register, so
the caller should pass NULL for regs,
- in case (b) the caller should should pass the IRQ registers to
dump_trace(),
- in case (c) bp should be gotten from the top of the task's stack, so
the caller should pass NULL for regs.
Hence, the bp argument is not necessary because the combination of
task and regs is sufficient to determine an appropriate value for bp.
This patch introduces a new inline function stack_frame(task, regs)
that computes the desired bp. This function is then called from the
two versions of dump_stack().
Signed-off-by: Soren Sandmann <ssp@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arjan van de Ven <arjan@infradead.org>,
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>,
LKML-Reference: <m3oc9rop28.fsf@dhcp-100-3-82.bos.redhat.com>>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-11-05 03:59:39 -06:00
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unsigned long *sp);
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2008-04-03 07:40:48 -06:00
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extern void __show_regs(struct pt_regs *regs, int all);
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2008-01-30 05:30:17 -07:00
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extern void show_regs(struct pt_regs *regs);
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2007-10-15 15:28:20 -06:00
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extern unsigned long oops_begin(void);
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2008-01-30 05:31:23 -07:00
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extern void oops_end(unsigned long, struct pt_regs *, int signr);
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2010-08-09 15:11:22 -06:00
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#ifdef CONFIG_KEXEC
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2010-07-20 17:09:05 -06:00
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extern int in_crash_kexec;
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2010-08-09 15:11:22 -06:00
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#else
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/* no crash dump is ever in progress if no crash kernel can be kexec'd */
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#define in_crash_kexec 0
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#endif
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2007-10-15 15:28:20 -06:00
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2008-10-22 23:26:29 -06:00
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#endif /* _ASM_X86_KDEBUG_H */
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