osfmk/ddb/db_write_cmd.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * HISTORY
  27  *
  28  * Revision 1.1.1.1  1998/09/22 21:05:48  wsanchez
  29  * Import of Mac OS X kernel (~semeria)
  30  *
  31  * Revision 1.1.1.1  1998/03/07 02:26:09  wsanchez
  32  * Import of OSF Mach kernel (~mburg)
  33  *
  34  * Revision 1.2.10.1  1994/09/23  01:23:15  ezf
  35  *      change marker to not FREE
  36  *      [1994/09/22  21:11:42  ezf]
  37  *
  38  * Revision 1.2.8.3  1994/03/17  22:35:48  dwm
  39  *      The infamous name change:  thread_activation + thread_shuttle = thread.
  40  *      [1994/03/17  21:26:02  dwm]
  41  *
  42  * Revision 1.2.8.2  1994/01/12  17:51:11  dwm
  43  *      Coloc: initial restructuring to follow Utah model.
  44  *      [1994/01/12  17:13:42  dwm]
  45  *
  46  * Revision 1.2.8.1  1994/01/05  19:28:25  bolinger
  47  *      Target current address space, not current "task", for writes.
  48  *      [1994/01/04  17:44:51  bolinger]
  49  *
  50  * Revision 1.2.2.3  1993/07/27  18:28:36  elliston
  51  *      Add ANSI prototypes.  CR #9523.
  52  *      [1993/07/27  18:13:37  elliston]
  53  *
  54  * Revision 1.2.2.2  1993/06/09  02:21:11  gm
  55  *      Added to OSF/1 R1.3 from NMK15.0.
  56  *      [1993/06/02  20:58:03  jeffc]
  57  *
  58  * Revision 1.2  1993/04/19  16:03:43  devrcs
  59  *      Changes from mk78:
  60  *      Removed unused variable 'p' from db_write_cmd().
  61  *      [92/05/16            jfriedl]
  62  *      Reorganized. w/u now works, instead of just w/tu.
  63  *      [92/04/18            danner]
  64  *      [93/02/02            bruel]
  65  *
  66  * Revision 1.1  1992/09/30  02:01:35  robert
  67  *      Initial revision
  68  *
  69  * $EndLog$
  70  */
  71 /* CMU_HIST */
  72 /*
  73  * Revision 2.6  91/10/09  16:05:06  af
  74  *       Revision 2.5.3.1  91/10/05  13:09:25  jeffreyh
  75  *              Added user space write support including inactive task.
  76  *              [91/08/29            tak]
  77  *
  78  * Revision 2.5.3.1  91/10/05  13:09:25  jeffreyh
  79  *      Added user space write support including inactive task.
  80  *      [91/08/29            tak]
  81  *
  82  * Revision 2.5  91/05/14  15:38:04  mrt
  83  *      Correcting copyright
  84  *
  85  * Revision 2.4  91/02/05  17:07:35  mrt
  86  *      Changed to new Mach copyright
  87  *      [91/01/31  16:20:19  mrt]
  88  *
  89  * Revision 2.3  90/10/25  14:44:26  rwd
  90  *      Changed db_write_cmd to print unsigned.
  91  *      [90/10/19            rpd]
  92  *
  93  * Revision 2.2  90/08/27  21:53:54  dbg
  94  *      Set db_prev and db_next instead of explicitly advancing dot.
  95  *      [90/08/22            dbg]
  96  *      Reflected changes in db_printsym()'s calling seq.
  97  *      [90/08/20            af]
  98  *      Warn user if nothing was written.
  99  *      [90/08/07            dbg]
 100  *      Created.
 101  *      [90/07/25            dbg]
 102  *
 103  */
 104 /* CMU_ENDHIST */
 105 /*
 106  * Mach Operating System
 107  * Copyright (c) 1991,1990 Carnegie Mellon University
 108  * All Rights Reserved.
 109  *
 110  * Permission to use, copy, modify and distribute this software and its
 111  * documentation is hereby granted, provided that both the copyright
 112  * notice and this permission notice appear in all copies of the
 113  * software, derivative works or modified versions, and any portions
 114  * thereof, and that both notices appear in supporting documentation.
 115  *
 116  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 117  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 118  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 119  *
 120  * Carnegie Mellon requests users of this software to return to
 121  *
 122  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 123  *  School of Computer Science
 124  *  Carnegie Mellon University
 125  *  Pittsburgh PA 15213-3890
 126  *
 127  * any improvements or extensions that they make and grant Carnegie Mellon
 128  * the rights to redistribute these changes.
 129  */
 130 /*
 131  */
 132 /*
 133  *      Author: David B. Golub,  Carnegie Mellon University
 134  *      Date:   7/90
 135  */
 136
 137 #include <mach/boolean.h>
 138 #include <kern/task.h>
 139 #include <kern/thread.h>
 140
 141 #include <machine/db_machdep.h>
 142
 143 #include <ddb/db_lex.h>
 144 #include <ddb/db_access.h>
 145 #include <ddb/db_command.h>
 146 #include <ddb/db_sym.h>
 147 #include <ddb/db_task_thread.h>
 148 #include <ddb/db_expr.h>
 149 #include <ddb/db_write_cmd.h>
 150 #include <ddb/db_output.h>                      /* For db_printf() */
 151
 152 /*
 153  * Write to file.
 154  */
 155 void
 156 db_write_cmd(
 157         db_expr_t       address,
 158         boolean_t       have_addr,
 159         db_expr_t       count,
 160         char *          modif)
 161 {
 162         register db_addr_t      addr;
 163         register db_expr_t      old_value;
 164         db_expr_t       new_value;
 165         register int    size;
 166         boolean_t       wrote_one = FALSE;
 167         boolean_t       t_opt, u_opt;
 168         thread_act_t    thr_act;
 169         task_t          task;
 170
 171         addr = (db_addr_t) address;
 172
 173         size = db_size_option(modif, &u_opt, &t_opt);
 174
 175         if (t_opt)
 176           {
 177             if (!db_get_next_act(&thr_act, 0))
 178               return;
 179             task = thr_act->task;
 180           }
 181         else
 182           task = db_current_space();
 183
 184         /* if user space is not explicitly specified,
 185            look in the kernel */
 186         if (!u_opt)
 187           task = TASK_NULL;
 188
 189         if (!DB_VALID_ADDRESS(addr, u_opt)) {
 190           db_printf("Bad address 0x%x\n", addr);
 191           return;
 192         }
 193
 194         while (db_expression(&new_value)) {
 195             old_value = db_get_task_value(addr, size, FALSE, task);
 196             db_task_printsym(addr, DB_STGY_ANY, task);
 197             db_printf("\t\t%#8n\t=\t%#8n\n", old_value, new_value);
 198             db_put_task_value(addr, size, new_value, task);
 199             addr += size;
 200
 201             wrote_one = TRUE;
 202         }
 203
 204         if (!wrote_one)
 205             db_error("Nothing written.\n");
 206
 207         db_next = addr;
 208         db_prev = addr - size;
 209 }