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  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28 /*
  29  * HISTORY
  30  *
  31  * Revision 1.1.1.1  1998/09/22 21:05:48  wsanchez
  32  * Import of Mac OS X kernel (~semeria)
  33  *
  34  * Revision 1.1.1.1  1998/03/07 02:26:09  wsanchez
  35  * Import of OSF Mach kernel (~mburg)
  36  *
  37  * Revision 1.2.10.1  1994/09/23  01:23:15  ezf
  38  *      change marker to not FREE
  39  *      [1994/09/22  21:11:42  ezf]
  40  *
  41  * Revision 1.2.8.3  1994/03/17  22:35:48  dwm
  42  *      The infamous name change:  thread_activation + thread_shuttle = thread.
  43  *      [1994/03/17  21:26:02  dwm]
  44  *
  45  * Revision 1.2.8.2  1994/01/12  17:51:11  dwm
  46  *      Coloc: initial restructuring to follow Utah model.
  47  *      [1994/01/12  17:13:42  dwm]
  48  *
  49  * Revision 1.2.8.1  1994/01/05  19:28:25  bolinger
  50  *      Target current address space, not current "task", for writes.
  51  *      [1994/01/04  17:44:51  bolinger]
  52  *
  53  * Revision 1.2.2.3  1993/07/27  18:28:36  elliston
  54  *      Add ANSI prototypes.  CR #9523.
  55  *      [1993/07/27  18:13:37  elliston]
  56  *
  57  * Revision 1.2.2.2  1993/06/09  02:21:11  gm
  58  *      Added to OSF/1 R1.3 from NMK15.0.
  59  *      [1993/06/02  20:58:03  jeffc]
  60  *
  61  * Revision 1.2  1993/04/19  16:03:43  devrcs
  62  *      Changes from mk78:
  63  *      Removed unused variable 'p' from db_write_cmd().
  64  *      [92/05/16            jfriedl]
  65  *      Reorganized. w/u now works, instead of just w/tu.
  66  *      [92/04/18            danner]
  67  *      [93/02/02            bruel]
  68  *
  69  * Revision 1.1  1992/09/30  02:01:35  robert
  70  *      Initial revision
  71  *
  72  * $EndLog$
  73  */
  74 /* CMU_HIST */
  75 /*
  76  * Revision 2.6  91/10/09  16:05:06  af
  77  *       Revision 2.5.3.1  91/10/05  13:09:25  jeffreyh
  78  *              Added user space write support including inactive task.
  79  *              [91/08/29            tak]
  80  *
  81  * Revision 2.5.3.1  91/10/05  13:09:25  jeffreyh
  82  *      Added user space write support including inactive task.
  83  *      [91/08/29            tak]
  84  *
  85  * Revision 2.5  91/05/14  15:38:04  mrt
  86  *      Correcting copyright
  87  *
  88  * Revision 2.4  91/02/05  17:07:35  mrt
  89  *      Changed to new Mach copyright
  90  *      [91/01/31  16:20:19  mrt]
  91  *
  92  * Revision 2.3  90/10/25  14:44:26  rwd
  93  *      Changed db_write_cmd to print unsigned.
  94  *      [90/10/19            rpd]
  95  *
  96  * Revision 2.2  90/08/27  21:53:54  dbg
  97  *      Set db_prev and db_next instead of explicitly advancing dot.
  98  *      [90/08/22            dbg]
  99  *      Reflected changes in db_printsym()'s calling seq.
 100  *      [90/08/20            af]
 101  *      Warn user if nothing was written.
 102  *      [90/08/07            dbg]
 103  *      Created.
 104  *      [90/07/25            dbg]
 105  *
 106  */
 107 /* CMU_ENDHIST */
 108 /*
 109  * Mach Operating System
 110  * Copyright (c) 1991,1990 Carnegie Mellon University
 111  * All Rights Reserved.
 112  *
 113  * Permission to use, copy, modify and distribute this software and its
 114  * documentation is hereby granted, provided that both the copyright
 115  * notice and this permission notice appear in all copies of the
 116  * software, derivative works or modified versions, and any portions
 117  * thereof, and that both notices appear in supporting documentation.
 118  *
 119  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 120  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 121  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 122  *
 123  * Carnegie Mellon requests users of this software to return to
 124  *
 125  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 126  *  School of Computer Science
 127  *  Carnegie Mellon University
 128  *  Pittsburgh PA 15213-3890
 129  *
 130  * any improvements or extensions that they make and grant Carnegie Mellon
 131  * the rights to redistribute these changes.
 132  */
 133 /*
 134  */
 135 /*
 136  *      Author: David B. Golub,  Carnegie Mellon University
 137  *      Date:   7/90
 138  */
 139
 140 #include <mach/boolean.h>
 141 #include <kern/task.h>
 142 #include <kern/thread.h>
 143
 144 #include <machine/db_machdep.h>
 145
 146 #include <ddb/db_lex.h>
 147 #include <ddb/db_access.h>
 148 #include <ddb/db_command.h>
 149 #include <ddb/db_sym.h>
 150 #include <ddb/db_task_thread.h>
 151 #include <ddb/db_expr.h>
 152 #include <ddb/db_write_cmd.h>
 153 #include <ddb/db_output.h>                      /* For db_printf() */
 154
 155 /*
 156  * Write to file.
 157  */
 158 void
 159 db_write_cmd(
 160         db_expr_t       address,
 161         boolean_t       have_addr,
 162         db_expr_t       count,
 163         char *          modif)
 164 {
 165         register db_addr_t      addr;
 166         register db_expr_t      old_value;
 167         db_expr_t       new_value;
 168         register int    size;
 169         boolean_t       wrote_one = FALSE;
 170         boolean_t       t_opt, u_opt;
 171         thread_act_t    thr_act;
 172         task_t          task;
 173
 174         addr = (db_addr_t) address;
 175
 176         size = db_size_option(modif, &u_opt, &t_opt);
 177
 178         if (t_opt)
 179           {
 180             if (!db_get_next_act(&thr_act, 0))
 181               return;
 182             task = thr_act->task;
 183           }
 184         else
 185           task = db_current_space();
 186
 187         /* if user space is not explicitly specified,
 188            look in the kernel */
 189         if (!u_opt)
 190           task = TASK_NULL;
 191
 192         if (!DB_VALID_ADDRESS(addr, u_opt)) {
 193           db_printf("Bad address 0x%x\n", addr);
 194           return;
 195         }
 196
 197         while (db_expression(&new_value)) {
 198             old_value = db_get_task_value(addr, size, FALSE, task);
 199             db_task_printsym(addr, DB_STGY_ANY, task);
 200             db_printf("\t\t%#8n\t=\t%#8n\n", old_value, new_value);
 201             db_put_task_value(addr, size, new_value, task);
 202             addr += size;
 203
 204             wrote_one = TRUE;
 205         }
 206
 207         if (!wrote_one)
 208             db_error("Nothing written.\n");
 209
 210         db_next = addr;
 211         db_prev = addr - size;
 212 }