172 lines
3.7 KiB
C
172 lines
3.7 KiB
C
/*-
|
|
* SPDX-License-Identifier: MIT-CMU
|
|
*
|
|
* Mach Operating System
|
|
* Copyright (c) 1991,1990 Carnegie Mellon University
|
|
* All Rights Reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
|
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <ddb/ddb.h>
|
|
#include <ddb/db_lex.h>
|
|
#include <ddb/db_variables.h>
|
|
|
|
static int db_find_variable(struct db_variable **varp);
|
|
|
|
static struct db_variable db_vars[] = {
|
|
{ "radix", &db_radix, FCN_NULL },
|
|
{ "maxoff", &db_maxoff, FCN_NULL },
|
|
{ "maxwidth", &db_max_width, FCN_NULL },
|
|
{ "tabstops", &db_tab_stop_width, FCN_NULL },
|
|
{ "lines", &db_lines_per_page, FCN_NULL },
|
|
{ "curcpu", NULL, db_var_curcpu },
|
|
{ "db_cpu", NULL, db_var_db_cpu },
|
|
#ifdef VIMAGE
|
|
{ "curvnet", NULL, db_var_curvnet },
|
|
{ "db_vnet", NULL, db_var_db_vnet },
|
|
#endif
|
|
};
|
|
static struct db_variable *db_evars = db_vars + nitems(db_vars);
|
|
|
|
static int
|
|
db_find_variable(struct db_variable **varp)
|
|
{
|
|
struct db_variable *vp;
|
|
int t;
|
|
|
|
t = db_read_token();
|
|
if (t == tIDENT) {
|
|
for (vp = db_vars; vp < db_evars; vp++) {
|
|
if (!strcmp(db_tok_string, vp->name)) {
|
|
*varp = vp;
|
|
return (1);
|
|
}
|
|
}
|
|
for (vp = db_regs; vp < db_eregs; vp++) {
|
|
if (!strcmp(db_tok_string, vp->name)) {
|
|
*varp = vp;
|
|
return (1);
|
|
}
|
|
}
|
|
}
|
|
db_error("Unknown variable\n");
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
db_get_variable(db_expr_t *valuep)
|
|
{
|
|
struct db_variable *vp;
|
|
|
|
if (!db_find_variable(&vp))
|
|
return (0);
|
|
|
|
return (db_read_variable(vp, valuep));
|
|
}
|
|
|
|
int
|
|
db_set_variable(db_expr_t value)
|
|
{
|
|
struct db_variable *vp;
|
|
|
|
if (!db_find_variable(&vp))
|
|
return (0);
|
|
|
|
return (db_write_variable(vp, value));
|
|
}
|
|
|
|
int
|
|
db_read_variable(struct db_variable *vp, db_expr_t *valuep)
|
|
{
|
|
db_varfcn_t *func = vp->fcn;
|
|
|
|
if (func == FCN_NULL) {
|
|
*valuep = *(vp->valuep);
|
|
return (1);
|
|
}
|
|
return ((*func)(vp, valuep, DB_VAR_GET));
|
|
}
|
|
|
|
int
|
|
db_write_variable(struct db_variable *vp, db_expr_t value)
|
|
{
|
|
db_varfcn_t *func = vp->fcn;
|
|
|
|
if (func == FCN_NULL) {
|
|
*(vp->valuep) = value;
|
|
return (1);
|
|
}
|
|
return ((*func)(vp, &value, DB_VAR_SET));
|
|
}
|
|
|
|
void
|
|
db_set_cmd(db_expr_t dummy1, bool dummy2, db_expr_t dummy3, char *dummy4)
|
|
{
|
|
struct db_variable *vp;
|
|
db_expr_t value;
|
|
int t;
|
|
|
|
t = db_read_token();
|
|
if (t == tEOL) {
|
|
for (vp = db_vars; vp < db_evars; vp++) {
|
|
if (!db_read_variable(vp, &value)) {
|
|
db_printf("$%s\n", vp->name);
|
|
continue;
|
|
}
|
|
db_printf("$%-8s = %ld\n",
|
|
vp->name, (unsigned long)value);
|
|
}
|
|
return;
|
|
}
|
|
if (t != tDOLLAR) {
|
|
db_error("Unknown variable\n");
|
|
return;
|
|
}
|
|
if (!db_find_variable(&vp)) {
|
|
db_error("Unknown variable\n");
|
|
return;
|
|
}
|
|
|
|
t = db_read_token();
|
|
if (t != tEQ)
|
|
db_unread_token(t);
|
|
|
|
if (!db_expression(&value)) {
|
|
db_error("No value\n");
|
|
return;
|
|
}
|
|
if (db_read_token() != tEOL)
|
|
db_error("?\n");
|
|
|
|
db_write_variable(vp, value);
|
|
}
|