Initial import, 0.1 + pk 0.2.4-B1

1 files changed, 526 insertions, 0 deletions

diff --git a/sys/ddb/db_command.c b/sys/ddb/db_command.c
new file mode 100644
index 0000000..e660e18
--- /dev/null
+++ b/sys/ddb/db_command.c
@@ -0,0 +1,526 @@
+/* 
+ * 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.
+ */
+/*
+ * HISTORY
+ * $Log: db_command.c,v $
+ *
+ * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
+ * --------------------         -----   ----------------------
+ * CURRENT PATCH LEVEL:         1       00081
+ * --------------------         -----   ----------------------
+ *
+ * 01 Feb 93	Julian Elischer		move strcmp to a more general
+ *					part of the kernel.
+ *
+ * Revision 1.1  1992/03/25  21:45:02  pace
+ * Initial revision
+ *
+ * Revision 2.6  91/02/05  17:06:10  mrt
+ * 	Changed to new Mach copyright
+ * 	[91/01/31  16:17:18  mrt]
+ * 
+ * Revision 2.5  91/01/08  17:31:54  rpd
+ * 	Forward reference for db_fncall();
+ * 	[91/01/04  12:35:17  rvb]
+ * 
+ * 	Add call as a synonym for ! and match for next
+ * 	[91/01/04  12:14:48  rvb]
+ * 
+ * Revision 2.4  90/11/07  16:49:15  rpd
+ * 	Added search.
+ * 	[90/11/06            rpd]
+ * 
+ * Revision 2.3  90/10/25  14:43:45  rwd
+ * 	Changed db_fncall to print the result unsigned.
+ * 	[90/10/19            rpd]
+ * 
+ * 	Added CS_MORE to db_watchpoint_cmd.
+ * 	[90/10/17            rpd]
+ * 	Added watchpoint commands: watch, dwatch, show watches.
+ * 	[90/10/16            rpd]
+ * 
+ * Revision 2.2  90/08/27  21:50:10  dbg
+ * 	Remove 'listbreaks' - use 'show breaks' instead.  Change 'show
+ * 	threads' to 'show all threads' to avoid clash with 'show thread'.
+ * 	Set 'dot' here from db_prev or db_next, depending on 'db_ed_style'
+ * 	flag and syntax table.
+ * 	[90/08/22            dbg]
+ * 	Reduce lint.
+ * 	[90/08/07            dbg]
+ * 	Created.
+ * 	[90/07/25            dbg]
+ * 
+ */
+/*
+ *	Author: David B. Golub, Carnegie Mellon University
+ *	Date:	7/90
+ */
+/*
+ * Command dispatcher.
+ */
+#include "param.h"
+#include "proc.h"
+#include <machine/db_machdep.h>		/* type definitions */
+
+#include <ddb/db_lex.h>
+#include <ddb/db_output.h>
+
+#include <setjmp.h>
+
+/*
+ * Exported global variables
+ */
+boolean_t	db_cmd_loop_done;
+jmp_buf		db_jmpbuf;
+db_addr_t	db_dot;
+db_addr_t	db_last_addr;
+db_addr_t	db_prev;
+db_addr_t	db_next;
+
+/*
+ * if 'ed' style: 'dot' is set at start of last item printed,
+ * and '+' points to next line.
+ * Otherwise: 'dot' points to next item, '..' points to last.
+ */
+boolean_t	db_ed_style = TRUE;
+
+
+/*
+ * Utility routine - discard tokens through end-of-line.
+ */
+void
+db_skip_to_eol()
+{
+	int	t;
+	do {
+	    t = db_read_token();
+	} while (t != tEOL);
+}
+
+/*
+ * Command table
+ */
+struct command {
+	char *	name;		/* command name */
+	void	(*fcn)();	/* function to call */
+	int	flag;		/* extra info: */
+#define	CS_OWN		0x1	    /* non-standard syntax */
+#define	CS_MORE		0x2	    /* standard syntax, but may have other
+				       words at end */
+#define	CS_SET_DOT	0x100	    /* set dot after command */
+	struct command *more;	/* another level of command */
+};
+
+/*
+ * Results of command search.
+ */
+#define	CMD_UNIQUE	0
+#define	CMD_FOUND	1
+#define	CMD_NONE	2
+#define	CMD_AMBIGUOUS	3
+#define	CMD_HELP	4
+
+/*
+ * Search for command prefix.
+ */
+int
+db_cmd_search(name, table, cmdp)
+	char *		name;
+	struct command	*table;
+	struct command	**cmdp;	/* out */
+{
+	struct command	*cmd;
+	int		result = CMD_NONE;
+
+	for (cmd = table; cmd->name != 0; cmd++) {
+	    register char *lp;
+	    register char *rp;
+	    register int  c;
+
+	    lp = name;
+	    rp = cmd->name;
+	    while ((c = *lp) == *rp) {
+		if (c == 0) {
+		    /* complete match */
+		    *cmdp = cmd;
+		    return (CMD_UNIQUE);
+		}
+		lp++;
+		rp++;
+	    }
+	    if (c == 0) {
+		/* end of name, not end of command -
+		   partial match */
+		if (result == CMD_FOUND) {
+		    result = CMD_AMBIGUOUS;
+		    /* but keep looking for a full match -
+		       this lets us match single letters */
+		}
+		else {
+		    *cmdp = cmd;
+		    result = CMD_FOUND;
+		}
+	    }
+	}
+	if (result == CMD_NONE) {
+	    /* check for 'help' */
+		if (name[0] == 'h' && name[1] == 'e'
+		    && name[2] == 'l' && name[3] == 'p')
+			result = CMD_HELP;
+	}
+	return (result);
+}
+
+void
+db_cmd_list(table)
+	struct command *table;
+{
+	register struct command *cmd;
+
+	for (cmd = table; cmd->name != 0; cmd++) {
+	    db_printf("%-12s", cmd->name);
+	    db_end_line();
+	}
+}
+
+void
+db_command(last_cmdp, cmd_table)
+	struct command	**last_cmdp;	/* IN_OUT */
+	struct command	*cmd_table;
+{
+	struct command	*cmd;
+	int		t;
+	char		modif[TOK_STRING_SIZE];
+	db_expr_t	addr, count;
+	boolean_t	have_addr;
+	int		result;
+
+	t = db_read_token();
+	if (t == tEOL) {
+	    /* empty line repeats last command, at 'next' */
+	    cmd = *last_cmdp;
+	    addr = (db_expr_t)db_next;
+	    have_addr = FALSE;
+	    count = 1;
+	    modif[0] = '\0';
+	}
+	else if (t == tEXCL) {
+	    void db_fncall();
+	    db_fncall();
+	    return;
+	}
+	else if (t != tIDENT) {
+	    db_printf("?\n");
+	    db_flush_lex();
+	    return;
+	}
+	else {
+	    /*
+	     * Search for command
+	     */
+	    while (cmd_table) {
+		result = db_cmd_search(db_tok_string,
+				       cmd_table,
+				       &cmd);
+		switch (result) {
+		    case CMD_NONE:
+			db_printf("No such command\n");
+			db_flush_lex();
+			return;
+		    case CMD_AMBIGUOUS:
+			db_printf("Ambiguous\n");
+			db_flush_lex();
+			return;
+		    case CMD_HELP:
+			db_cmd_list(cmd_table);
+			db_flush_lex();
+			return;
+		    default:
+			break;
+		}
+		if ((cmd_table = cmd->more) != 0) {
+		    t = db_read_token();
+		    if (t != tIDENT) {
+			db_cmd_list(cmd_table);
+			db_flush_lex();
+			return;
+		    }
+		}
+	    }
+
+	    if ((cmd->flag & CS_OWN) == 0) {
+		/*
+		 * Standard syntax:
+		 * command [/modifier] [addr] [,count]
+		 */
+		t = db_read_token();
+		if (t == tSLASH) {
+		    t = db_read_token();
+		    if (t != tIDENT) {
+			db_printf("Bad modifier\n");
+			db_flush_lex();
+			return;
+		    }
+		    db_strcpy(modif, db_tok_string);
+		}
+		else {
+		    db_unread_token(t);
+		    modif[0] = '\0';
+		}
+
+		if (db_expression(&addr)) {
+		    db_dot = (db_addr_t) addr;
+		    db_last_addr = db_dot;
+		    have_addr = TRUE;
+		}
+		else {
+		    addr = (db_expr_t) db_dot;
+		    have_addr = FALSE;
+		}
+		t = db_read_token();
+		if (t == tCOMMA) {
+		    if (!db_expression(&count)) {
+			db_printf("Count missing\n");
+			db_flush_lex();
+			return;
+		    }
+		}
+		else {
+		    db_unread_token(t);
+		    count = -1;
+		}
+		if ((cmd->flag & CS_MORE) == 0) {
+		    db_skip_to_eol();
+		}
+	    }
+	}
+	*last_cmdp = cmd;
+	if (cmd != 0) {
+	    /*
+	     * Execute the command.
+	     */
+	    (*cmd->fcn)(addr, have_addr, count, modif);
+
+	    if (cmd->flag & CS_SET_DOT) {
+		/*
+		 * If command changes dot, set dot to
+		 * previous address displayed (if 'ed' style).
+		 */
+		if (db_ed_style) {
+		    db_dot = db_prev;
+		}
+		else {
+		    db_dot = db_next;
+		}
+	    }
+	    else {
+		/*
+		 * If command does not change dot,
+		 * set 'next' location to be the same.
+		 */
+		db_next = db_dot;
+	    }
+	}
+}
+
+/*
+ * 'show' commands
+ */
+extern void	db_listbreak_cmd();
+extern void	db_listwatch_cmd();
+extern void	db_show_regs(), db_show_one_thread(), db_show_all_threads();
+extern void	vm_map_print(), vm_object_print(), vm_page_print();
+extern void	ipc_port_print();
+void		db_show_help();
+
+struct command db_show_all_cmds[] = {
+#if 0
+	{ "threads",	db_show_all_threads,0,	0 },
+#endif
+	{ (char *)0 }
+};
+
+struct command db_show_cmds[] = {
+	{ "all",	0,			0,	db_show_all_cmds },
+	{ "registers",	db_show_regs,		0,	0 },
+	{ "breaks",	db_listbreak_cmd, 	0,	0 },
+	{ "watches",	db_listwatch_cmd, 	0,	0 },
+#if 0
+	{ "thread",	db_show_one_thread,	0,	0 },
+#endif
+	{ "map",	vm_map_print,		0,	0 },
+	{ "object",	vm_object_print,	0,	0 },
+#if 0
+	{ "page",	vm_page_print,		0,	0 },
+#endif
+#if 0
+	{ "port",	ipc_port_print,		0,	0 },
+#endif
+	{ (char *)0, }
+};
+
+extern void	db_print_cmd(), db_examine_cmd(), db_set_cmd();
+extern void	db_search_cmd();
+extern void	db_write_cmd();
+extern void	db_delete_cmd(), db_breakpoint_cmd();
+extern void	db_deletewatch_cmd(), db_watchpoint_cmd();
+extern void	db_single_step_cmd(), db_trace_until_call_cmd(),
+		db_trace_until_matching_cmd(), db_continue_cmd();
+extern void	db_stack_trace_cmd();
+void		db_help_cmd();
+void		db_fncall();
+
+struct command db_command_table[] = {
+	{ "print",	db_print_cmd,		0,	0 },
+	{ "examine",	db_examine_cmd,		CS_SET_DOT, 0 },
+	{ "x",		db_examine_cmd,		CS_SET_DOT, 0 },
+	{ "search",	db_search_cmd,		CS_OWN|CS_SET_DOT, 0 },
+	{ "set",	db_set_cmd,		CS_OWN,	0 },
+	{ "write",	db_write_cmd,		CS_MORE|CS_SET_DOT, 0 },
+	{ "w",		db_write_cmd,		CS_MORE|CS_SET_DOT, 0 },
+	{ "delete",	db_delete_cmd,		0,	0 },
+	{ "d",		db_delete_cmd,		0,	0 },
+	{ "break",	db_breakpoint_cmd,	0,	0 },
+	{ "dwatch",	db_deletewatch_cmd,	0,	0 },
+	{ "watch",	db_watchpoint_cmd,	CS_MORE,0 },
+	{ "step",	db_single_step_cmd,	0,	0 },
+	{ "s",		db_single_step_cmd,	0,	0 },
+	{ "continue",	db_continue_cmd,	0,	0 },
+	{ "c",		db_continue_cmd,	0,	0 },
+	{ "until",	db_trace_until_call_cmd,0,	0 },
+	{ "next",	db_trace_until_matching_cmd,0,	0 },
+	{ "match",	db_trace_until_matching_cmd,0,	0 },
+	{ "trace",	db_stack_trace_cmd,	0,	0 },
+	{ "call",	db_fncall,		CS_OWN,	0 },
+	{ "show",	0,			0,	db_show_cmds },
+	{ (char *)0, }
+};
+
+struct command	*db_last_command = 0;
+
+void
+db_help_cmd()
+{
+	struct command *cmd = db_command_table;
+
+	while (cmd->name != 0) {
+	    db_printf("%-12s", cmd->name);
+	    db_end_line();
+	    cmd++;
+	}
+}
+
+void
+db_command_loop()
+{
+	/*
+	 * Initialize 'prev' and 'next' to dot.
+	 */
+	db_prev = db_dot;
+	db_next = db_dot;
+
+	db_cmd_loop_done = 0;
+	while (!db_cmd_loop_done) {
+
+	    (void) setjmp(db_jmpbuf);
+	    if (db_print_position() != 0)
+		db_printf("\n");
+
+	    db_printf("db> ");
+	    (void) db_read_line();
+
+	    db_command(&db_last_command, db_command_table);
+	}
+}
+
+void
+db_error(s)
+	char *s;
+{
+	if (s)
+	    db_printf(s);
+	db_flush_lex();
+	longjmp(db_jmpbuf, 1);
+}
+
+
+/*
+ * Call random function:
+ * !expr(arg,arg,arg)
+ */
+void
+db_fncall()
+{
+	db_expr_t	fn_addr;
+#define	MAXARGS		11
+	db_expr_t	args[MAXARGS];
+	int		nargs = 0;
+	db_expr_t	retval;
+	db_expr_t	(*func)();
+	int		t;
+
+	if (!db_expression(&fn_addr)) {
+	    db_printf("Bad function\n");
+	    db_flush_lex();
+	    return;
+	}
+	func = (db_expr_t (*) ()) fn_addr;
+
+	t = db_read_token();
+	if (t == tLPAREN) {
+	    if (db_expression(&args[0])) {
+		nargs++;
+		while ((t = db_read_token()) == tCOMMA) {
+		    if (nargs == MAXARGS) {
+			db_printf("Too many arguments\n");
+			db_flush_lex();
+			return;
+		    }
+		    if (!db_expression(&args[nargs])) {
+			db_printf("Argument missing\n");
+			db_flush_lex();
+			return;
+		    }
+		    nargs++;
+		}
+		db_unread_token(t);
+	    }
+	    if (db_read_token() != tRPAREN) {
+		db_printf("?\n");
+		db_flush_lex();
+		return;
+	    }
+	}
+	db_skip_to_eol();
+
+	while (nargs < MAXARGS) {
+	    args[nargs++] = 0;
+	}
+
+	retval = (*func)(args[0], args[1], args[2], args[3], args[4],
+			 args[5], args[6], args[7], args[8], args[9] );
+	db_printf("%#n\n", retval);
+}