88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/* $NetBSD: db_cpu.c,v 1.7 2014/04/12 19:25:48 jakllsch Exp $ */
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/*-
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* Copyright (c) 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: db_cpu.c,v 1.7 2014/04/12 19:25:48 jakllsch Exp $");
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#ifndef _KERNEL
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#include <stdbool.h>
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#endif
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#include <sys/param.h>
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#include <sys/cpu.h>
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#include <sys/proc.h>
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#include <ddb/ddb.h>
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static int db_ncpu;
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static struct cpu_info **db_cpu_infos;
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static void
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db_cpu_init(void)
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{
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db_expr_t addr;
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db_value_of_name("ncpu", &addr);
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db_read_bytes((db_addr_t)addr, sizeof(db_ncpu), (char *)&db_ncpu);
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db_value_of_name("cpu_infos", &addr);
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db_read_bytes((db_addr_t)addr, sizeof(db_cpu_infos),
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(char *)&db_cpu_infos);
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}
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static struct cpu_info *
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db_cpu_by_index(u_int idx)
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{
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struct cpu_info *ci;
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db_read_bytes((db_addr_t)&db_cpu_infos[idx], sizeof(ci), (char *)&ci);
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return ci;
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}
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struct cpu_info *
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db_cpu_first(void)
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{
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db_cpu_init();
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return db_cpu_by_index(0);
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}
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struct cpu_info *
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db_cpu_next(struct cpu_info *ci)
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{
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u_int idx;
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db_read_bytes((db_addr_t)&ci->ci_index, sizeof(idx), (char *)&idx);
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if ((idx + 1) >= (u_int)db_ncpu)
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return NULL;
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return db_cpu_by_index(idx + 1);
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}
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