Initial source

1 files changed, 597 insertions, 0 deletions

diff --git a/ddb/db_command.c b/ddb/db_command.c
new file mode 100644
index 0000000..50a02bd
--- /dev/null
+++ b/ddb/db_command.c
@@ -0,0 +1,597 @@
+/* 
+ * Mach Operating System
+ * Copyright (c) 1991 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.
+ */
+/*
+ *	Author: David B. Golub, Carnegie Mellon University
+ *	Date:	7/90
+ */
+
+#include "mach_kdb.h"
+#if MACH_KDB
+
+/*
+ * Command dispatcher.
+ */
+#include <cpus.h>
+#include <norma_ipc.h>
+#include <norma_vm.h>
+
+#include <mach/boolean.h>
+#include <kern/strings.h>
+#include <machine/db_machdep.h>
+
+#include <ddb/db_lex.h>
+#include <ddb/db_output.h>
+#include <ddb/db_command.h>
+#include <ddb/db_task_thread.h>
+
+#include <machine/setjmp.h>
+#include <kern/thread.h>
+#include <ipc/ipc_pset.h> /* 4proto */
+#include <ipc/ipc_port.h> /* 4proto */
+
+
+
+/*
+ * Exported global variables
+ */
+boolean_t	db_cmd_loop_done;
+jmp_buf_t	*db_recover = 0;
+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;
+
+/*
+ * 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 db_command	*table;
+	struct db_command	**cmdp;	/* out */
+{
+	struct db_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 (!strncmp(name, "help", strlen(name)))
+		result = CMD_HELP;
+	}
+	return (result);
+}
+
+void
+db_cmd_list(table)
+	struct db_command *table;
+{
+	register struct db_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 db_command	**last_cmdp;	/* IN_OUT */
+	struct db_command	*cmd_table;
+{
+	struct db_command	*cmd;
+	int		t;
+	char		modif[TOK_STRING_SIZE];
+	db_expr_t	addr, count;
+	boolean_t	have_addr = FALSE;
+	int		result;
+
+	t = db_read_token();
+	if (t == tEOL || t == tSEMI_COLON) {
+	    /* empty line repeats last command, at 'next' */
+	    cmd = *last_cmdp;
+	    addr = (db_expr_t)db_next;
+	    have_addr = FALSE;
+	    count = 1;
+	    modif[0]  = '\0';
+	    if (t == tSEMI_COLON)
+		db_unread_token(t);
+	}
+	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:
+			if (db_exec_macro(db_tok_string) == 0)
+			    return;
+			db_printf("No such command \"%s\"\n", db_tok_string);
+			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 \"/%s\"\n", db_tok_string);
+			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 after ','\n");
+			db_flush_lex();
+			return;
+		    }
+		}
+		else {
+		    db_unread_token(t);
+		    count = -1;
+		}
+	    }
+	}
+	*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;
+	    }
+	}
+}
+
+void
+db_command_list(last_cmdp, cmd_table)
+	struct db_command	**last_cmdp;	/* IN_OUT */
+	struct db_command	*cmd_table;
+{
+	void db_skip_to_eol();
+
+	do {
+	    db_command(last_cmdp, cmd_table);
+	    db_skip_to_eol();
+	} while (db_read_token() == tSEMI_COLON && db_cmd_loop_done == 0);
+}
+
+/*
+ * 'show' commands
+ */
+extern void	db_listbreak_cmd();
+extern void	db_listwatch_cmd();
+extern void	db_show_regs(), db_show_one_thread(), db_show_one_task();
+extern void	db_show_all_threads();
+extern void	db_show_macro();
+extern void	vm_map_print(), vm_object_print(), vm_page_print();
+extern void	vm_map_copy_print();
+extern void	ipc_port_print(), ipc_pset_print(), db_show_all_slocks();
+extern void	ipc_kmsg_print(), ipc_msg_print();
+extern void	db_show_port_id();
+void		db_show_help();
+#if	NORMA_IPC
+extern void	netipc_packet_print(), netipc_pcs_print(), db_show_all_uids();
+extern void	db_show_all_proxies(), db_show_all_principals();
+extern void	db_show_all_uids_verbose();
+#endif	NORMA_IPC
+#if	NORMA_VM
+extern void	xmm_obj_print(), xmm_reply_print();
+#endif	NORMA_VM
+
+struct db_command db_show_all_cmds[] = {
+	{ "threads",	db_show_all_threads,	0,	0 },
+	{ "slocks",	db_show_all_slocks,	0,	0 },
+#if	NORMA_IPC
+	{ "uids",	db_show_all_uids,	0,	0 },
+	{ "proxies",	db_show_all_proxies,	0,	0 },
+	{ "principals",	db_show_all_principals,	0,	0 },
+	{ "vuids",	db_show_all_uids_verbose, 0,	0 },
+#endif	NORMA_IPC
+	{ (char *)0 }
+};
+
+struct db_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 },
+	{ "thread",	db_show_one_thread,	0,	0 },
+	{ "task",	db_show_one_task,	0,	0 },
+	{ "macro",	db_show_macro,		CS_OWN, 0 },
+	{ "map",	vm_map_print,		0,	0 },
+	{ "object",	vm_object_print,	0,	0 },
+	{ "page",	vm_page_print,		0,	0 },
+	{ "copy",	vm_map_copy_print,	0,	0 },
+	{ "port",	ipc_port_print,		0,	0 },
+	{ "pset",	ipc_pset_print,		0,	0 },
+	{ "kmsg",	ipc_kmsg_print,		0,	0 },
+	{ "msg",	ipc_msg_print,		0,	0 },
+	{ "ipc_port",	db_show_port_id,	0,	0 },
+#if	NORMA_IPC
+	{ "packet",	netipc_packet_print,	0,	0 },
+	{ "pcs",	netipc_pcs_print,	0,	0 },
+#endif	NORMA_IPC
+#if	NORMA_VM
+	{ "xmm_obj",	xmm_obj_print,		0,	0 },
+	{ "xmm_reply",	xmm_reply_print,	0,	0 },
+#endif	NORMA_VM
+	{ (char *)0, }
+};
+
+extern void	db_print_cmd(), db_examine_cmd(), db_set_cmd();
+extern void	db_examine_forward(), db_examine_backward();
+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(), db_cond_cmd();
+void		db_help_cmd();
+void		db_def_macro_cmd(), db_del_macro_cmd();
+void		db_fncall();
+extern void	db_reset_cpu();
+
+struct db_command db_command_table[] = {
+#ifdef DB_MACHINE_COMMANDS
+  /* this must be the first entry, if it exists */
+	{ "machine",    0,                      0,     		0},
+#endif
+	{ "print",	db_print_cmd,		CS_OWN,		0 },
+	{ "examine",	db_examine_cmd,		CS_MORE|CS_SET_DOT, 0 },
+	{ "x",		db_examine_cmd,		CS_MORE|CS_SET_DOT, 0 },
+	{ "xf",		db_examine_forward,	CS_SET_DOT,	0 },
+	{ "xb",		db_examine_backward,	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,		CS_OWN,		0 },
+	{ "d",		db_delete_cmd,		CS_OWN,		0 },
+	{ "break",	db_breakpoint_cmd,	CS_MORE,	0 },
+	{ "dwatch",	db_deletewatch_cmd,	CS_MORE,	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 },
+	{ "cond",	db_cond_cmd,		CS_OWN,	 	0 },
+	{ "call",	db_fncall,		CS_OWN,		0 },
+	{ "macro",	db_def_macro_cmd,	CS_OWN,	 	0 },
+	{ "dmacro",	db_del_macro_cmd,	CS_OWN,		0 },
+	{ "show",	0,			0,	db_show_cmds },
+	{ "reset",	db_reset_cpu,		0,		0 },
+	{ "reboot",	db_reset_cpu,		0,		0 },
+	{ (char *)0, }
+};
+
+#ifdef DB_MACHINE_COMMANDS
+
+/* this function should be called to install the machine dependent
+   commands. It should be called before the debugger is enabled  */
+void db_machine_commands_install(ptr)
+struct db_command *ptr;
+{
+  db_command_table[0].more = ptr;
+  return;
+}
+
+#endif
+
+
+struct db_command	*db_last_command = 0;
+
+void
+db_help_cmd()
+{
+	struct db_command *cmd = db_command_table;
+
+	while (cmd->name != 0) {
+	    db_printf("%-12s", cmd->name);
+	    db_end_line();
+	    cmd++;
+	}
+}
+
+int	(*ddb_display)();
+
+void
+db_command_loop()
+{
+	jmp_buf_t db_jmpbuf;
+	jmp_buf_t *prev = db_recover;
+	extern int db_output_line;
+	extern int db_macro_level;
+#if	NORMA_IPC
+	extern int _node_self;	/* node_self() may not be callable yet */
+#endif	NORMA_IPC
+
+	/*
+	 * Initialize 'prev' and 'next' to dot.
+	 */
+	db_prev = db_dot;
+	db_next = db_dot;
+
+	if (ddb_display)
+		(*ddb_display)();
+
+	db_cmd_loop_done = 0;
+	while (!db_cmd_loop_done) {
+	    (void) _setjmp(db_recover = &db_jmpbuf);
+	    db_macro_level = 0;
+	    if (db_print_position() != 0)
+		db_printf("\n");
+	    db_output_line = 0;
+	    db_printf("db%s", (db_default_thread)? "t": "");
+#if	NORMA_IPC
+	    db_printf("%d", _node_self);
+#endif
+#if	NCPUS > 1
+	    db_printf("{%d}", cpu_number());
+#endif
+	    db_printf("> ");
+
+	    (void) db_read_line("!!");
+	    db_command_list(&db_last_command, db_command_table);
+	}
+
+	db_recover = prev;
+}
+
+boolean_t
+db_exec_cmd_nest(cmd, size)
+	char *cmd;
+	int  size;
+{
+	struct db_lex_context lex_context;
+
+	db_cmd_loop_done = 0;
+	if (cmd) {
+	    db_save_lex_context(&lex_context);
+	    db_switch_input(cmd, size /**OLD, &lex_context OLD**/);
+	}
+	db_command_list(&db_last_command, db_command_table);
+	if (cmd)
+	    db_restore_lex_context(&lex_context);
+	return(db_cmd_loop_done == 0);
+}
+
+#ifdef __GNUC__
+extern __volatile__ void _longjmp();
+#endif
+
+void db_error(s)
+	char *s;
+{
+	extern int db_macro_level;
+
+	db_macro_level = 0;
+	if (db_recover) {
+	    if (s)
+		db_printf(s);
+	    db_flush_lex();
+	    _longjmp(db_recover, 1);
+	}
+	else
+	{
+	    if (s)
+	        db_printf(s);
+	    panic("db_error");
+	}
+}
+
+/*
+ * 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 \"%s\"\n", db_tok_string);
+	    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;
+	    }
+	}
+	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);
+}
+
+boolean_t
+db_option(modif, option)
+	char	*modif;
+	int	option;
+{
+	register char *p;
+
+	for (p = modif; *p; p++)
+	    if (*p == option)
+		return(TRUE);
+	return(FALSE);
+}
+
+#endif MACH_KDB