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Annotation of Gnu-Mach/ddb/db_write_cmd.c, revision 1.1.1.1

1.1       root        1: /* 
                      2:  * Mach Operating System
                      3:  * Copyright (c) 1992,1991,1990 Carnegie Mellon University
                      4:  * All Rights Reserved.
                      5:  * 
                      6:  * Permission to use, copy, modify and distribute this software and its
                      7:  * documentation is hereby granted, provided that both the copyright
                      8:  * notice and this permission notice appear in all copies of the
                      9:  * software, derivative works or modified versions, and any portions
                     10:  * thereof, and that both notices appear in supporting documentation.
                     11:  * 
                     12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     15:  * 
                     16:  * Carnegie Mellon requests users of this software to return to
                     17:  * 
                     18:  *  Software Distribution Coordinator  or  [email protected]
                     19:  *  School of Computer Science
                     20:  *  Carnegie Mellon University
                     21:  *  Pittsburgh PA 15213-3890
                     22:  * 
                     23:  * any improvements or extensions that they make and grant Carnegie Mellon
                     24:  * the rights to redistribute these changes.
                     25:  */
                     26: /*
                     27:  *     Author: David B. Golub,  Carnegie Mellon University
                     28:  *     Date:   7/90
                     29:  */
                     30: 
                     31: #include "mach_kdb.h"
                     32: #if MACH_KDB
                     33: 
                     34: #include <mach/boolean.h>
                     35: #include <kern/task.h>
                     36: #include <kern/thread.h>
                     37: 
                     38: #include <machine/db_machdep.h>
                     39: 
                     40: #include <ddb/db_lex.h>
                     41: #include <ddb/db_access.h>
                     42: #include <ddb/db_command.h>
                     43: #include <ddb/db_sym.h>
                     44: #include <ddb/db_task_thread.h>
                     45: 
                     46: 
                     47: 
                     48: /*
                     49:  * Write to file.
                     50:  */
                     51: /*ARGSUSED*/
                     52: void
                     53: db_write_cmd(address, have_addr, count, modif)
                     54:        db_expr_t       address;
                     55:        boolean_t       have_addr;
                     56:        db_expr_t       count;
                     57:        char *          modif;
                     58: {
                     59:        register db_addr_t      addr;
                     60:        register db_expr_t      old_value;
                     61:        db_expr_t       new_value;
                     62:        register int    size;
                     63:        boolean_t       wrote_one = FALSE;
                     64:        boolean_t       t_opt, u_opt;
                     65:        thread_t        thread;
                     66:        task_t          task;
                     67: 
                     68:        addr = (db_addr_t) address;
                     69: 
                     70:        size = db_size_option(modif, &u_opt, &t_opt);
                     71:        if (t_opt) 
                     72:          {
                     73:            if (!db_get_next_thread(&thread, 0))
                     74:              return;
                     75:            task = thread->task;
                     76:          }
                     77:        else
                     78:          task = db_current_task();
                     79:        
                     80:        /* if user space is not explicitly specified, 
                     81:           look in the kernel */
                     82:        if (!u_opt)
                     83:          task = TASK_NULL;
                     84: 
                     85:        if (!DB_VALID_ADDRESS(addr, u_opt)) {
                     86:          db_printf("Bad address %#*X\n", 2*sizeof(vm_offset_t), addr);
                     87:          return;
                     88:        }
                     89: 
                     90:        while (db_expression(&new_value)) {
                     91:            old_value = db_get_task_value(addr, size, FALSE, task);
                     92:            db_task_printsym(addr, DB_STGY_ANY, task);
                     93:            db_printf("\t\t%#*N\t=\t%#*N\n",
                     94:                2*sizeof(db_expr_t), old_value,
                     95:                2*sizeof(db_expr_t), new_value);
                     96:            db_put_task_value(addr, size, new_value, task);
                     97:            addr += size;
                     98: 
                     99:            wrote_one = TRUE;
                    100:        }
                    101: 
                    102:        if (!wrote_one)
                    103:            db_error("Nothing written.\n");
                    104: 
                    105:        db_next = addr;
                    106:        db_prev = addr - size;
                    107: }
                    108: 
                    109: #endif MACH_KDB

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