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db_cpu.c revision 1.5 
      1 /*	$NetBSD: db_cpu.c,v 1.5 2013/11/24 21:58:38 rmind Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2009 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: db_cpu.c,v 1.5 2013/11/24 21:58:38 rmind Exp $");
     34 
     35 #ifndef _KERNEL
     36 #include <stdbool.h>
     37 #endif
     38 
     39 #include <sys/param.h>
     40 #include <sys/cpu.h>
     41 #include <sys/proc.h>
     42 
     43 #include <ddb/ddb.h>
     44 
     45 static struct cpu_info **cpu_info_addr;
     46 
     47 static struct cpu_info *
     48 db_cpu_index(u_int idx)
     49 {
     50 	db_addr_t slot_addr = (db_addr_t)(cpu_info_addr + idx);
     51 	struct cpu_info *ci;
     52 
     53 	db_read_bytes(slot_addr, sizeof(ci), (char *)&ci);
     54 	return ci;
     55 }
     56 
     57 struct cpu_info *
     58 db_cpu_first(void)
     59 {
     60 	db_value_of_name("cpu_infos", (db_expr_t *)&cpu_info_addr);
     61 	return db_cpu_index(0);
     62 }
     63 
     64 struct cpu_info *
     65 db_cpu_next(struct cpu_info *ci)
     66 {
     67 	u_int idx;
     68 
     69 	db_read_bytes((db_addr_t)&ci->ci_index, sizeof(idx), (char *)&idx);
     70 	return db_cpu_index(idx + 1);
     71 }
     72