ccd8bad0bb
(DPCPU): A new API, kvm_dpcpu_setcpu(3), selects the active CPU for the purposes of DPCPU. Calls to kvm_nlist(3) will automatically translate DPCPU symbols and return a pointer to the current CPU's version of the data. Consumers needing to read the same symbol on several CPUs will invoke a series of setcpu/nlist calls, one per CPU of interest. This addition makes it possible for tools like netstat(1) to query the values of DPCPU variables during crashdump analysis, and is based on similar code handling virtualized global variables. MFC after: 1 week Sponsored by: Juniper Networks, Inc.
112 lines
4.7 KiB
C
112 lines
4.7 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software developed by the Computer Systems
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* Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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* BG 91-66 and contributed to Berkeley.
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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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* 4. Neither the name of the University nor the names of its 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 REGENTS 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 REGENTS 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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* @(#)kvm_private.h 8.1 (Berkeley) 6/4/93
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* $FreeBSD$
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*/
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struct __kvm {
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/*
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* a string to be prepended to error messages
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* provided for compatibility with sun's interface
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* if this value is null, errors are saved in errbuf[]
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*/
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const char *program;
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char *errp; /* XXX this can probably go away */
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char errbuf[_POSIX2_LINE_MAX];
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#define ISALIVE(kd) ((kd)->vmfd >= 0)
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int pmfd; /* physical memory file (or crashdump) */
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int vmfd; /* virtual memory file (-1 if crashdump) */
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int unused; /* was: swap file (e.g., /dev/drum) */
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int nlfd; /* namelist file (e.g., /kernel) */
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struct kinfo_proc *procbase;
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char *argspc; /* (dynamic) storage for argv strings */
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int arglen; /* length of the above */
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char **argv; /* (dynamic) storage for argv pointers */
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int argc; /* length of above (not actual # present) */
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char *argbuf; /* (dynamic) temporary storage */
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/*
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* Kernel virtual address translation state. This only gets filled
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* in for dead kernels; otherwise, the running kernel (i.e. kmem)
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* will do the translations for us. It could be big, so we
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* only allocate it if necessary.
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*/
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struct vmstate *vmst;
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int rawdump; /* raw dump format */
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int vnet_initialized; /* vnet fields set up */
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uintptr_t vnet_start; /* start of kernel's vnet region */
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uintptr_t vnet_stop; /* stop of kernel's vnet region */
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uintptr_t vnet_current; /* vnet we're working with */
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uintptr_t vnet_base; /* vnet base of current vnet */
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/*
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* Dynamic per-CPU kernel memory. We translate symbols, on-demand,
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* to the data associated with dpcpu_curcpu, set with
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* kvm_dpcpu_setcpu().
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*/
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int dpcpu_initialized; /* dpcpu fields set up */
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uintptr_t dpcpu_start; /* start of kernel's dpcpu region */
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uintptr_t dpcpu_stop; /* stop of kernel's dpcpu region */
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u_int dpcpu_maxcpus; /* size of base array */
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uintptr_t *dpcpu_off; /* base array, indexed by CPU ID */
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u_int dpcpu_curcpu; /* CPU we're currently working with */
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uintptr_t dpcpu_curoff; /* dpcpu base of current CPU */
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};
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/*
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* Functions used internally by kvm, but across kvm modules.
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*/
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void _kvm_err(kvm_t *kd, const char *program, const char *fmt, ...)
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__printflike(3, 4);
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void _kvm_freeprocs(kvm_t *kd);
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void _kvm_freevtop(kvm_t *);
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int _kvm_initvtop(kvm_t *);
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int _kvm_kvatop(kvm_t *, u_long, off_t *);
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void *_kvm_malloc(kvm_t *kd, size_t);
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int _kvm_nlist(kvm_t *, struct nlist *, int);
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void *_kvm_realloc(kvm_t *kd, void *, size_t);
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void _kvm_syserr (kvm_t *kd, const char *program, const char *fmt, ...)
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__printflike(3, 4);
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int _kvm_uvatop(kvm_t *, const struct proc *, u_long, u_long *);
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int _kvm_vnet_selectpid(kvm_t *, pid_t);
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int _kvm_vnet_initialized(kvm_t *, int);
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uintptr_t _kvm_vnet_validaddr(kvm_t *, uintptr_t);
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int _kvm_dpcpu_initialized(kvm_t *, int);
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uintptr_t _kvm_dpcpu_validaddr(kvm_t *, uintptr_t);
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#if defined(__amd64__) || defined(__i386__) || defined(__arm__)
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void _kvm_minidump_freevtop(kvm_t *);
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int _kvm_minidump_initvtop(kvm_t *);
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int _kvm_minidump_kvatop(kvm_t *, u_long, off_t *);
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#endif
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