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 #include <sys/queue.h> /* LIST_* */ 47 #include <sys/kernel.h> /* SYSINIT */ 48 49 #ifndef DB_MAXARGS 50 #define DB_MAXARGS 10 51 #endif 52 53 #ifndef DB_MAXLINE 54 #define DB_MAXLINE 120 55 #endif 56 57 #ifndef DB_MAXSCRIPTS 58 #define DB_MAXSCRIPTS 8 59 #endif 60 61 #ifndef DB_MAXSCRIPTNAME 62 #define DB_MAXSCRIPTNAME 32 63 #endif 64 65 #ifndef DB_MAXSCRIPTLEN 66 #define DB_MAXSCRIPTLEN 128 67 #endif 68 69 #ifndef DB_MAXSCRIPTRECURSION 70 #define DB_MAXSCRIPTRECURSION 3 71 #endif 72 73 #ifndef DB_CALL 74 #define DB_CALL db_fncall_generic 75 #else 76 int DB_CALL(db_expr_t, db_expr_t *, int, db_expr_t[]); 77 #endif 78 79 /* 80 * There are three "command tables": 81 * - One for simple commands; a list of these is displayed 82 * by typing 'help' at the debugger prompt. 83 * - One for sub-commands of 'show'; to see this type 'show' 84 * without any arguments. 85 * - The last one for sub-commands of 'show all'; type 'show all' 86 * without any argument to get a list. 87 */ 88 struct command; 89 LIST_HEAD(command_table, command); 90 extern struct command_table db_cmd_table; 91 extern struct command_table db_show_table; 92 extern struct command_table db_show_all_table; 93 94 /* 95 * Type signature for a function implementing a ddb command. 96 */ 97 typedef void db_cmdfcn_t(db_expr_t addr, boolean_t have_addr, db_expr_t count, 98 char *modif); 99 100 /* 101 * Command table entry. 102 */ 103 struct command { 104 char * name; /* command name */ 105 db_cmdfcn_t *fcn; /* function to call */ 106 int flag; /* extra info: */ 107 #define CS_OWN 0x1 /* non-standard syntax */ 108 #define CS_MORE 0x2 /* standard syntax, but may have other words 109 * at end */ 110 #define CS_SET_DOT 0x100 /* set dot after command */ 111 struct command_table *more; /* another level of command */ 112 LIST_ENTRY(command) next; /* next entry in the command table */ 113 }; 114 115 /* 116 * Arrange for the specified ddb command to be defined and 117 * bound to the specified function. Commands can be defined 118 * in modules in which case they will be available only when 119 * the module is loaded. 120 */ 121 #define _DB_SET(_suffix, _name, _func, list, _flag, _more) \ 122 static struct command __CONCAT(_name,_suffix) = { \ 123 .name = __STRING(_name), \ 124 .fcn = _func, \ 125 .flag = _flag, \ 126 .more = _more \ 127 }; \ 128 static void __CONCAT(__CONCAT(_name,_suffix),_add)(void *arg __unused) \ 129 { db_command_register(&list, &__CONCAT(_name,_suffix)); } \ 130 SYSINIT(__CONCAT(_name,_suffix), SI_SUB_KLD, SI_ORDER_ANY, \ 131 __CONCAT(__CONCAT(_name,_suffix),_add), NULL); \ 132 static void __CONCAT(__CONCAT(_name,_suffix),_del)(void *arg __unused) \ 133 { db_command_unregister(&list, &__CONCAT(_name,_suffix)); } \ 134 SYSUNINIT(__CONCAT(_name,_suffix), SI_SUB_KLD, SI_ORDER_ANY, \ 135 __CONCAT(__CONCAT(_name,_suffix),_del), NULL); 136 137 /* 138 * Like _DB_SET but also create the function declaration which 139 * must be followed immediately by the body; e.g. 140 * _DB_FUNC(_cmd, panic, db_panic, db_cmd_table, 0, NULL) 141 * { 142 * ...panic implementation... 143 * } 144 * 145 * This macro is mostly used to define commands placed in one of 146 * the ddb command tables; see DB_COMMAND, etc. below. 147 */ 148 #define _DB_FUNC(_suffix, _name, _func, list, _flag, _more) \ 149 static db_cmdfcn_t _func; \ 150 _DB_SET(_suffix, _name, _func, list, _flag, _more); \ 151 static void \ 152 _func(db_expr_t addr, boolean_t have_addr, db_expr_t count, char *modif) 153 154 /* common idom provided for backwards compatibility */ 155 #define DB_FUNC(_name, _func, list, _flag, _more) \ 156 _DB_FUNC(_cmd, _name, _func, list, _flag, _more) 157 158 #define DB_COMMAND(cmd_name, func_name) \ 159 _DB_FUNC(_cmd, cmd_name, func_name, db_cmd_table, 0, NULL) 160 #define DB_ALIAS(alias_name, func_name) \ 161 _DB_SET(_cmd, alias_name, func_name, db_cmd_table, 0, NULL) 162 #define DB_SHOW_COMMAND(cmd_name, func_name) \ 163 _DB_FUNC(_show, cmd_name, func_name, db_show_table, 0, NULL) 164 #define DB_SHOW_ALIAS(alias_name, func_name) \ 165 _DB_SET(_show, alias_name, func_name, db_show_table, 0, NULL) 166 #define DB_SHOW_ALL_COMMAND(cmd_name, func_name) \ 167 _DB_FUNC(_show_all, cmd_name, func_name, db_show_all_table, 0, NULL) 168 #define DB_SHOW_ALL_ALIAS(alias_name, func_name) \ 169 _DB_SET(_show_all, alias_name, func_name, db_show_all_table, 0, NULL) 170 171 extern db_expr_t db_maxoff; 172 extern int db_indent; 173 extern int db_inst_count; 174 extern int db_load_count; 175 extern int db_store_count; 176 extern volatile int db_pager_quit; 177 extern db_expr_t db_radix; 178 extern db_expr_t db_max_width; 179 extern db_expr_t db_tab_stop_width; 180 extern db_expr_t db_lines_per_page; 181 182 struct thread; 183 struct vm_map; 184 185 void db_check_interrupt(void); 186 void db_clear_watchpoints(void); 187 db_addr_t db_disasm(db_addr_t loc, boolean_t altfmt); 188 /* instruction disassembler */ 189 void db_error(const char *s); 190 int db_expression(db_expr_t *valuep); 191 int db_get_variable(db_expr_t *valuep); 192 void db_iprintf(const char *,...) __printflike(1, 2); 193 struct proc *db_lookup_proc(db_expr_t addr); 194 struct thread *db_lookup_thread(db_expr_t addr, boolean_t check_pid); 195 struct vm_map *db_map_addr(vm_offset_t); 196 boolean_t db_map_current(struct vm_map *); 197 boolean_t db_map_equal(struct vm_map *, struct vm_map *); 198 int db_md_set_watchpoint(db_expr_t addr, db_expr_t size); 199 int db_md_clr_watchpoint(db_expr_t addr, db_expr_t size); 200 void db_md_list_watchpoints(void); 201 void db_print_loc_and_inst(db_addr_t loc); 202 void db_print_thread(void); 203 void db_printf(const char *fmt, ...) __printflike(1, 2); 204 int db_read_bytes(vm_offset_t addr, size_t size, char *data); 205 /* machine-dependent */ 206 int db_readline(char *lstart, int lsize); 207 void db_restart_at_pc(boolean_t watchpt); 208 int db_set_variable(db_expr_t value); 209 void db_set_watchpoints(void); 210 void db_skip_to_eol(void); 211 boolean_t db_stop_at_pc(boolean_t *is_breakpoint); 212 #define db_strcpy strcpy 213 void db_trace_self(void); 214 int db_trace_thread(struct thread *, int); 215 int db_value_of_name(const char *name, db_expr_t *valuep); 216 int db_write_bytes(vm_offset_t addr, size_t size, char *data); 217 void db_command_register(struct command_table *, struct command *); 218 void db_command_unregister(struct command_table *, struct command *); 219 220 db_cmdfcn_t db_breakpoint_cmd; 221 db_cmdfcn_t db_capture_cmd; 222 db_cmdfcn_t db_continue_cmd; 223 db_cmdfcn_t db_delete_cmd; 224 db_cmdfcn_t db_deletehwatch_cmd; 225 db_cmdfcn_t db_deletewatch_cmd; 226 db_cmdfcn_t db_examine_cmd; 227 db_cmdfcn_t db_hwatchpoint_cmd; 228 db_cmdfcn_t db_listbreak_cmd; 229 db_cmdfcn_t db_scripts_cmd; 230 db_cmdfcn_t db_print_cmd; 231 db_cmdfcn_t db_ps; 232 db_cmdfcn_t db_run_cmd; 233 db_cmdfcn_t db_script_cmd; 234 db_cmdfcn_t db_search_cmd; 235 db_cmdfcn_t db_set_cmd; 236 db_cmdfcn_t db_set_thread; 237 db_cmdfcn_t db_show_regs; 238 db_cmdfcn_t db_show_threads; 239 db_cmdfcn_t db_single_step_cmd; 240 db_cmdfcn_t db_textdump_cmd; 241 db_cmdfcn_t db_trace_until_call_cmd; 242 db_cmdfcn_t db_trace_until_matching_cmd; 243 db_cmdfcn_t db_unscript_cmd; 244 db_cmdfcn_t db_watchpoint_cmd; 245 db_cmdfcn_t db_write_cmd; 246 247 /* 248 * Interface between DDB and the DDB output capture facility. 249 */ 250 struct dumperinfo; 251 void db_capture_dump(struct dumperinfo *di); 252 void db_capture_enterpager(void); 253 void db_capture_exitpager(void); 254 void db_capture_write(char *buffer, u_int buflen); 255 void db_capture_writech(char ch); 256 257 /* 258 * Interface between DDB and the script facility. 259 */ 260 void db_script_kdbenter(const char *eventname); /* KDB enter event. */ 261 262 /* 263 * Interface between DDB and the textdump facility. 264 * 265 * Text dump blocks are of a fixed size; textdump_block_buffer is a 266 * statically allocated buffer that code interacting with textdumps can use 267 * to prepare and hold a pending block in when calling writenextblock(). 268 */ 269 #define TEXTDUMP_BLOCKSIZE 512 270 extern char textdump_block_buffer[TEXTDUMP_BLOCKSIZE]; 271 272 void textdump_mkustar(char *block_buffer, const char *filename, 273 u_int size); 274 void textdump_restoreoff(off_t offset); 275 void textdump_saveoff(off_t *offsetp); 276 int textdump_writenextblock(struct dumperinfo *di, char *buffer); 277 278 /* 279 * Interface between the kernel and textdumps. 280 */ 281 extern int textdump_pending; /* Call textdump_dumpsys() instead. */ 282 void textdump_dumpsys(struct dumperinfo *di); 283 284 #endif /* !_DDB_DDB_H_ */ 285