freebsd-dev/sys/ddb/db_write_cmd.c

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/*-
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* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
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*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 7/90
*/
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#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
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#include <ddb/ddb.h>
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#include <ddb/db_access.h>
#include <ddb/db_command.h>
#include <ddb/db_sym.h>
/*
* Write to file.
*/
/*ARGSUSED*/
void
db_write_cmd(db_expr_t address, bool have_addr, db_expr_t count,
char * modif)
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{
db_addr_t addr;
db_expr_t old_value;
db_expr_t new_value;
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int size;
bool wrote_one = false;
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addr = (db_addr_t) address;
switch (modif[0]) {
case 'b':
size = 1;
break;
case 'h':
size = 2;
break;
case 'l':
case '\0':
size = 4;
break;
default:
db_error("Unknown size\n");
return;
}
while (db_expression(&new_value)) {
old_value = db_get_value(addr, size, false);
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db_printsym(addr, DB_STGY_ANY);
db_printf("\t\t%#8lr\t=\t%#8lr\n", (long)old_value,(long)new_value);
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db_put_value(addr, size, new_value);
addr += size;
wrote_one = true;
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}
if (!wrote_one)
db_error("Nothing written.\n");
db_next = addr;
db_prev = addr - size;
db_skip_to_eol();
}