3e3d03562f
This provides kernel_debugger() which can be called from an interrupt context low level debugger wedge to execute commands that inspect kernel state. It doesn't do much on its own. Signed-off-by: Brian Swetland <swetland@google.com> kernel_debugger_core: Add sysrq command. sysrq <c> will run the sysrq command <c> and dump what was added to the kernel log while the command ran. Signed-off-by: Brian Swetland <swetland@google.com> Signed-off-by: Arve Hjønnevåg <arve@android.com>
42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/*
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* include/linux/kernel_debugger.h
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*
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* Copyright (C) 2008 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _LINUX_KERNEL_DEBUGGER_H_
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#define _LINUX_KERNEL_DEBUGGER_H_
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struct kdbg_ctxt {
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int (*printf)(void *cookie, const char *fmt, ...);
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void *cookie;
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};
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/* kernel_debugger() is called from IRQ context and should
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* use the kdbg_ctxt.printf to write output (do NOT call
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* printk, do operations not safe from IRQ context, etc).
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*
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* kdbg_ctxt.printf will return -1 if there is not enough
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* buffer space or if you are being aborted. In this case
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* you must return as soon as possible.
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*
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* Return non-zero if more data is available -- if buffer
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* space ran and you had to stop, but could print more,
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* for example.
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*
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* Additional calls where cmd is "more" will be made if
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* the additional data is desired.
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*/
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int kernel_debugger(struct kdbg_ctxt *ctxt, char *cmd);
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#endif
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