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Create releng/7.2 from stable/7 in preparation for 7.2-RELEASE.
[FreeBSD/releng/7.2.git] / sys / ddb / ddb.h
1 /*-
2  * Copyright (c) 1993, Garrett A. Wollman.
3  * Copyright (c) 1993, University of Vermont and State Agricultural College.
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. Neither the name of the University nor the names of its contributors
15  *    may be used to endorse or promote products derived from this software
16  *    without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  *
30  * $FreeBSD$
31  */
32
33 /*
34  * Necessary declarations for the `ddb' kernel debugger.
35  */
36
37 #ifndef _DDB_DDB_H_
38 #define _DDB_DDB_H_
39
40 #ifdef SYSCTL_DECL
41 SYSCTL_DECL(_debug_ddb);
42 #endif
43
44 #include <machine/db_machdep.h>         /* type definitions */
45
46 #ifndef DB_MAXARGS
47 #define DB_MAXARGS      10
48 #endif
49
50 #ifndef DB_MAXLINE
51 #define DB_MAXLINE      120
52 #endif
53
54 #ifndef DB_MAXSCRIPTS
55 #define DB_MAXSCRIPTS   8
56 #endif
57
58 #ifndef DB_MAXSCRIPTNAME
59 #define DB_MAXSCRIPTNAME        32
60 #endif
61
62 #ifndef DB_MAXSCRIPTLEN
63 #define DB_MAXSCRIPTLEN 128
64 #endif
65
66 #ifndef DB_MAXSCRIPTRECURSION
67 #define DB_MAXSCRIPTRECURSION   3
68 #endif
69
70 #ifndef DB_CALL
71 #define DB_CALL db_fncall_generic
72 #else
73 int     DB_CALL(db_expr_t, db_expr_t *, int, db_expr_t[]);
74 #endif
75
76 typedef void db_cmdfcn_t(db_expr_t addr, boolean_t have_addr, db_expr_t count,
77             char *modif);
78
79 #define DB_COMMAND(cmd_name, func_name) \
80         DB_FUNC(cmd_name, func_name, db_cmd_set, 0, NULL)
81 #define DB_SHOW_COMMAND(cmd_name, func_name) \
82         DB_FUNC(cmd_name, func_name, db_show_cmd_set, 0, NULL)
83 #define DB_SHOW_ALL_COMMAND(cmd_name, func_name) \
84         DB_FUNC(cmd_name, func_name, db_show_all_cmd_set, 0, NULL)
85
86 #define DB_SET(cmd_name, func_name, set, flag, more)            \
87 static const struct command __CONCAT(cmd_name,_cmd) = {         \
88         __STRING(cmd_name),                                     \
89         func_name,                                              \
90         flag,                                                   \
91         more                                                    \
92 };                                                              \
93 TEXT_SET(set, __CONCAT(cmd_name,_cmd))
94
95 #define DB_FUNC(cmd_name, func_name, set, flag, more)           \
96 static db_cmdfcn_t      func_name;                              \
97                                                                 \
98 DB_SET(cmd_name, func_name, set, flag, more);                   \
99                                                                 \
100 static void                                                     \
101 func_name(addr, have_addr, count, modif)                        \
102         db_expr_t addr;                                         \
103         boolean_t have_addr;                                    \
104         db_expr_t count;                                        \
105         char *modif;
106
107 extern db_expr_t db_maxoff;
108 extern int db_indent;
109 extern int db_inst_count;
110 extern int db_load_count;
111 extern int db_store_count;
112 extern volatile int db_pager_quit;
113 extern db_expr_t db_radix;
114 extern db_expr_t db_max_width;
115 extern db_expr_t db_tab_stop_width;
116 extern db_expr_t db_lines_per_page;
117
118 struct thread;
119 struct vm_map;
120
121 void            db_check_interrupt(void);
122 void            db_clear_watchpoints(void);
123 db_addr_t       db_disasm(db_addr_t loc, boolean_t altfmt);
124                                 /* instruction disassembler */
125 void            db_error(const char *s);
126 int             db_expression(db_expr_t *valuep);
127 int             db_get_variable(db_expr_t *valuep);
128 void            db_iprintf(const char *,...) __printflike(1, 2);
129 struct proc     *db_lookup_proc(db_expr_t addr);
130 struct thread   *db_lookup_thread(db_expr_t addr, boolean_t check_pid);
131 struct vm_map   *db_map_addr(vm_offset_t);
132 boolean_t       db_map_current(struct vm_map *);
133 boolean_t       db_map_equal(struct vm_map *, struct vm_map *);
134 int             db_md_set_watchpoint(db_expr_t addr, db_expr_t size);
135 int             db_md_clr_watchpoint(db_expr_t addr, db_expr_t size);
136 void            db_md_list_watchpoints(void);
137 void            db_print_loc_and_inst(db_addr_t loc);
138 void            db_print_thread(void);
139 void            db_printf(const char *fmt, ...) __printflike(1, 2);
140 int             db_read_bytes(vm_offset_t addr, size_t size, char *data);
141                                 /* machine-dependent */
142 int             db_readline(char *lstart, int lsize);
143 void            db_restart_at_pc(boolean_t watchpt);
144 int             db_set_variable(db_expr_t value);
145 void            db_set_watchpoints(void);
146 void            db_skip_to_eol(void);
147 boolean_t       db_stop_at_pc(boolean_t *is_breakpoint);
148 #define         db_strcpy       strcpy
149 void            db_trace_self(void);
150 int             db_trace_thread(struct thread *, int);
151 int             db_value_of_name(const char *name, db_expr_t *valuep);
152 int             db_write_bytes(vm_offset_t addr, size_t size, char *data);
153
154 db_cmdfcn_t     db_breakpoint_cmd;
155 db_cmdfcn_t     db_capture_cmd;
156 db_cmdfcn_t     db_continue_cmd;
157 db_cmdfcn_t     db_delete_cmd;
158 db_cmdfcn_t     db_deletehwatch_cmd;
159 db_cmdfcn_t     db_deletewatch_cmd;
160 db_cmdfcn_t     db_examine_cmd;
161 db_cmdfcn_t     db_hwatchpoint_cmd;
162 db_cmdfcn_t     db_listbreak_cmd;
163 db_cmdfcn_t     db_scripts_cmd;
164 db_cmdfcn_t     db_print_cmd;
165 db_cmdfcn_t     db_ps;
166 db_cmdfcn_t     db_run_cmd;
167 db_cmdfcn_t     db_script_cmd;
168 db_cmdfcn_t     db_search_cmd;
169 db_cmdfcn_t     db_set_cmd;
170 db_cmdfcn_t     db_set_thread;
171 db_cmdfcn_t     db_show_regs;
172 db_cmdfcn_t     db_show_threads;
173 db_cmdfcn_t     db_single_step_cmd;
174 db_cmdfcn_t     db_textdump_cmd;
175 db_cmdfcn_t     db_trace_until_call_cmd;
176 db_cmdfcn_t     db_trace_until_matching_cmd;
177 db_cmdfcn_t     db_unscript_cmd;
178 db_cmdfcn_t     db_watchpoint_cmd;
179 db_cmdfcn_t     db_write_cmd;
180
181 /*
182  * Command table.
183  */
184 struct command;
185
186 struct command_table {
187         struct command *table;
188         struct command **aux_tablep;
189         struct command **aux_tablep_end;
190 };
191
192 struct command {
193         char *  name;           /* command name */
194         db_cmdfcn_t *fcn;       /* function to call */
195         int     flag;           /* extra info: */
196 #define CS_OWN          0x1     /* non-standard syntax */
197 #define CS_MORE         0x2     /* standard syntax, but may have other words
198                                  * at end */
199 #define CS_SET_DOT      0x100   /* set dot after command */
200         struct command_table *more; /* another level of command */
201 };
202
203 /*
204  * Interface between DDB and the DDB output capture facility.
205  */
206 struct dumperinfo;
207 void    db_capture_dump(struct dumperinfo *di);
208 void    db_capture_enterpager(void);
209 void    db_capture_exitpager(void);
210 void    db_capture_write(char *buffer, u_int buflen);
211 void    db_capture_writech(char ch);
212
213 /*
214  * Interface between DDB  and the script facility.
215  */
216 void    db_script_kdbenter(const char *eventname);      /* KDB enter event. */
217
218 /*
219  * Interface between DDB and the textdump facility.
220  *
221  * Text dump blocks are of a fixed size; textdump_block_buffer is a
222  * statically allocated buffer that code interacting with textdumps can use
223  * to prepare and hold a pending block in when calling writenextblock().
224  */
225 #define TEXTDUMP_BLOCKSIZE      512
226 extern char     textdump_block_buffer[TEXTDUMP_BLOCKSIZE];
227
228 void    textdump_mkustar(char *block_buffer, const char *filename,
229             u_int size);
230 void    textdump_restoreoff(off_t offset);
231 void    textdump_saveoff(off_t *offsetp);
232 int     textdump_writenextblock(struct dumperinfo *di, char *buffer);
233
234 /*
235  * Interface between the kernel and textdumps.
236  */
237 extern int      textdump_pending;       /* Call textdump_dumpsys() instead. */
238 void    textdump_dumpsys(struct dumperinfo *di);
239
240 #endif /* !_DDB_DDB_H_ */