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/*
* 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 "AS IS"
* 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 Mellon
* the rights to redistribute these changes.
*/
#if MACH_KDB
#include <kern/thread.h>
#include <machine/db_machdep.h>
#include <ddb/db_lex.h>
#include <ddb/db_variables.h>
#include <ddb/db_command.h>
/*
* debugger macro support
*/
#define DB_MACRO_LEVEL 5 /* max macro nesting */
#define DB_NARGS 10 /* max args */
#define DB_NUSER_MACRO 10 /* max user macros */
int db_macro_free = DB_NUSER_MACRO;
struct db_user_macro {
char m_name[TOK_STRING_SIZE];
char m_lbuf[DB_LEX_LINE_SIZE];
int m_size;
} db_user_macro[DB_NUSER_MACRO];
int db_macro_level = 0;
db_expr_t db_macro_args[DB_MACRO_LEVEL][DB_NARGS];
static struct db_user_macro *
db_lookup_macro(name)
char *name;
{
register struct db_user_macro *mp;
for (mp = db_user_macro; mp < &db_user_macro[DB_NUSER_MACRO]; mp++) {
if (mp->m_name[0] == 0)
continue;
if (strcmp(mp->m_name, name) == 0)
return(mp);
}
return(0);
}
void
db_def_macro_cmd()
{
register char *p;
register c;
register struct db_user_macro *mp, *ep;
if (db_read_token() != tIDENT) {
db_printf("Bad macro name \"%s\"\n", db_tok_string);
db_error(0);
/* NOTREACHED */
}
if ((mp = db_lookup_macro(db_tok_string)) == 0) {
if (db_macro_free <= 0)
db_error("Too many macros\n");
/* NOTREACHED */
ep = &db_user_macro[DB_NUSER_MACRO];
for (mp = db_user_macro; mp < ep && mp->m_name[0]; mp++);
if (mp >= ep)
db_error("ddb: internal error(macro)\n");
/* NOTREACHED */
db_macro_free--;
db_strcpy(mp->m_name, db_tok_string);
}
for (c = db_read_char(); c == ' ' || c == '\t'; c = db_read_char());
for (p = mp->m_lbuf; c > 0; c = db_read_char())
*p++ = c;
*p = 0;
mp->m_size = p - mp->m_lbuf;
}
void
db_del_macro_cmd()
{
register struct db_user_macro *mp;
if (db_read_token() != tIDENT
|| (mp = db_lookup_macro(db_tok_string)) == 0) {
db_printf("No such macro \"%s\"\n", db_tok_string);
db_error(0);
/* NOTREACHED */
} else {
mp->m_name[0] = 0;
db_macro_free++;
}
}
void
db_show_macro()
{
register struct db_user_macro *mp;
int t;
char *name = 0;
if ((t = db_read_token()) == tIDENT)
name = db_tok_string;
else
db_unread_token(t);
for (mp = db_user_macro; mp < &db_user_macro[DB_NUSER_MACRO]; mp++) {
if (mp->m_name[0] == 0)
continue;
if (name && strcmp(mp->m_name, name))
continue;
db_printf("%s: %s", mp->m_name, mp->m_lbuf);
}
}
int
db_exec_macro(name)
char *name;
{
register struct db_user_macro *mp;
register n;
if ((mp = db_lookup_macro(name)) == 0)
return(-1);
if (db_macro_level+1 >= DB_MACRO_LEVEL) {
db_macro_level = 0;
db_error("Too many macro nest\n");
/* NOTREACHED */
}
for (n = 0;
n < DB_NARGS &&
db_expression(&db_macro_args[db_macro_level+1][n]);
n++);
while (n < DB_NARGS)
db_macro_args[db_macro_level+1][n++] = 0;
db_macro_level++;
db_exec_cmd_nest(mp->m_lbuf, mp->m_size);
db_macro_level--;
return(0);
}
int
/* ARGSUSED */
db_arg_variable(vp, valuep, flag, ap)
struct db_variable *vp;
db_expr_t *valuep;
int flag;
db_var_aux_param_t ap;
{
if (ap->level != 1 || ap->suffix[0] < 1 || ap->suffix[0] > DB_NARGS) {
db_error("Bad $arg variable\n");
/* NOTREACHED */
}
if (flag == DB_VAR_GET)
*valuep = db_macro_args[db_macro_level][ap->suffix[0]-1];
else
db_macro_args[db_macro_level][ap->suffix[0]-1] = *valuep;
return(0);
}
#endif /* MACH_KDB */
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