FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_cpu.c

     /*      $NetBSD: db_cpu.c,v 1.7 2014/04/12 19:25:48 jakllsch Exp $      */
     
     /*-
      * Copyright (c) 2009 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Andrew Doran.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: db_cpu.c,v 1.7 2014/04/12 19:25:48 jakllsch Exp $");
    
    #ifndef _KERNEL
    #include <stdbool.h>
    #endif
    
    #include <sys/param.h>
    #include <sys/cpu.h>
    #include <sys/proc.h>
    
    #include <ddb/ddb.h>
    
    static int              db_ncpu;
    static struct cpu_info  **db_cpu_infos;
    
    static void
    db_cpu_init(void)
    {
            db_expr_t addr;
    
            db_value_of_name("ncpu", &addr);
            db_read_bytes((db_addr_t)addr, sizeof(db_ncpu), (char *)&db_ncpu);
    
            db_value_of_name("cpu_infos", &addr);
            db_read_bytes((db_addr_t)addr, sizeof(db_cpu_infos),
                (char *)&db_cpu_infos);
    }
    
    static struct cpu_info *
    db_cpu_by_index(u_int idx)
    {
            struct cpu_info *ci;
    
            db_read_bytes((db_addr_t)&db_cpu_infos[idx], sizeof(ci), (char *)&ci);
            return ci;
    }
    
    struct cpu_info *
    db_cpu_first(void)
    {
    
            db_cpu_init();
            return db_cpu_by_index(0);
    }
    
    struct cpu_info *
    db_cpu_next(struct cpu_info *ci)
    {
            u_int idx;
    
            db_read_bytes((db_addr_t)&ci->ci_index, sizeof(idx), (char *)&idx);
            if ((idx + 1) >= (u_int)db_ncpu)
                    return NULL;
            return db_cpu_by_index(idx + 1);
    }

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