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