1adebe3cd6
The minidump code is written assuming that certain global state will not change, and rightly so, since it executes from a kernel debugger context. In order to support taking minidumps of a live system, we should allow copies of relevant global state that is likely to change to be passed as parameters to the minidumpsys() function. This patch does the work of parameterizing this function, by adding a struct minidumpstate argument. For now, this struct allows for copies of the kernel message buffer, and the bitset that tracks which pages should be dumped (vm_page_dump). Follow-up changes will actually make use of these arguments. Notably, dump_avail[] does not need a snapshot, since it is not expected to change after system initialization. The existing minidumpsys() definitions are renamed, and a thin MI wrapper is added to kern_dump.c, which handles the construction of the state struct. Thus, calling minidumpsys() remains as simple as before. Reviewed by: kib, markj, jhb Sponsored by: Juniper Networks, Inc. Sponsored by: Klara, Inc. MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D31989
63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1995 Bruce D. Evans.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: FreeBSD: src/sys/i386/include/md_var.h,v 1.40 2001/07/12
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* $FreeBSD$
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*/
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#ifndef _MACHINE_MD_VAR_H_
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#define _MACHINE_MD_VAR_H_
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extern long Maxmem;
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extern char sigcode[];
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extern int szsigcode;
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extern u_long elf_hwcap;
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extern u_long elf_hwcap2;
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extern vm_paddr_t arm_physmem_kernaddr;
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enum cpu_class {
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CPU_CLASS_NONE,
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CPU_CLASS_CORTEXA,
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CPU_CLASS_KRAIT,
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CPU_CLASS_ARM11J,
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CPU_CLASS_MARVELL
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};
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extern enum cpu_class cpu_class;
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struct dumperinfo;
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struct minidumpstate;
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extern int busdma_swi_pending;
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void busdma_swi(void);
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int cpu_minidumpsys(struct dumperinfo *, const struct minidumpstate *);
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extern uint32_t initial_fpscr;
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#endif /* !_MACHINE_MD_VAR_H_ */
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