1139747Simp/*- 24Srgrimes * Mach Operating System 34Srgrimes * Copyright (c) 1991,1990 Carnegie Mellon University 44Srgrimes * All Rights Reserved. 58876Srgrimes * 64Srgrimes * Permission to use, copy, modify and distribute this software and its 74Srgrimes * documentation is hereby granted, provided that both the copyright 84Srgrimes * notice and this permission notice appear in all copies of the 94Srgrimes * software, derivative works or modified versions, and any portions 104Srgrimes * thereof, and that both notices appear in supporting documentation. 118876Srgrimes * 128876Srgrimes * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 134Srgrimes * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 144Srgrimes * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 158876Srgrimes * 164Srgrimes * Carnegie Mellon requests users of this software to return to 178876Srgrimes * 184Srgrimes * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 194Srgrimes * School of Computer Science 204Srgrimes * Carnegie Mellon University 214Srgrimes * Pittsburgh PA 15213-3890 228876Srgrimes * 234Srgrimes * any improvements or extensions that they make and grant Carnegie the 244Srgrimes * rights to redistribute these changes. 254Srgrimes */ 264Srgrimes/* 274Srgrimes * Author: David B. Golub, Carnegie Mellon University 284Srgrimes * Date: 7/90 294Srgrimes */ 304Srgrimes/* 314Srgrimes * Command dispatcher. 324Srgrimes */ 33116176Sobrien 34116176Sobrien#include <sys/cdefs.h> 35116176Sobrien__FBSDID("$FreeBSD$"); 36116176Sobrien 372056Swollman#include <sys/param.h> 3842654Sjdp#include <sys/linker_set.h> 3986998Sdd#include <sys/lock.h> 40131952Smarcel#include <sys/kdb.h> 4186998Sdd#include <sys/mutex.h> 4286998Sdd#include <sys/proc.h> 4317848Spst#include <sys/reboot.h> 4486998Sdd#include <sys/signalvar.h> 452056Swollman#include <sys/systm.h> 4649558Sphk#include <sys/cons.h> 47222801Smarcel#include <sys/conf.h> 48126399Sphk#include <sys/watchdog.h> 49183054Ssam#include <sys/kernel.h> 5012734Sbde 512056Swollman#include <ddb/ddb.h> 5212473Sbde#include <ddb/db_command.h> 534Srgrimes#include <ddb/db_lex.h> 544Srgrimes#include <ddb/db_output.h> 554Srgrimes 56118990Smarcel#include <machine/cpu.h> 5779418Sjulian#include <machine/setjmp.h> 584Srgrimes 594Srgrimes/* 604Srgrimes * Exported global variables 614Srgrimes */ 624Srgrimesboolean_t db_cmd_loop_done; 6318296Sbdedb_addr_t db_dot; 644Srgrimesdb_addr_t db_last_addr; 654Srgrimesdb_addr_t db_prev; 664Srgrimesdb_addr_t db_next; 674Srgrimes 68222801Smarcelstatic db_cmdfcn_t db_dump; 6912515Sphkstatic db_cmdfcn_t db_fncall; 70132002Smarcelstatic db_cmdfcn_t db_gdb; 71163192Sbdestatic db_cmdfcn_t db_halt; 7286998Sddstatic db_cmdfcn_t db_kill; 7385944Speterstatic db_cmdfcn_t db_reset; 74132482Smarcelstatic db_cmdfcn_t db_stack_trace; 75150819Srwatsonstatic db_cmdfcn_t db_stack_trace_all; 76126399Sphkstatic db_cmdfcn_t db_watchdog; 7717848Spst 78148919Sobrien/* 79148919Sobrien * 'show' commands 80148919Sobrien */ 8118296Sbde 82148919Sobrienstatic struct command db_show_all_cmds[] = { 83183054Ssam { "trace", db_stack_trace_all, 0, 0 }, 84148919Sobrien}; 85183054Ssamstruct command_table db_show_all_table = 86183054Ssam LIST_HEAD_INITIALIZER(db_show_all_table); 87148919Sobrien 88148919Sobrienstatic struct command db_show_cmds[] = { 89156412Sjhb { "all", 0, 0, &db_show_all_table }, 90148919Sobrien { "registers", db_show_regs, 0, 0 }, 91148919Sobrien { "breaks", db_listbreak_cmd, 0, 0 }, 92148919Sobrien { "threads", db_show_threads, 0, 0 }, 93148919Sobrien}; 94183054Ssamstruct command_table db_show_table = LIST_HEAD_INITIALIZER(db_show_table); 95148919Sobrien 96183054Ssamstatic struct command db_cmds[] = { 97148919Sobrien { "print", db_print_cmd, 0, 0 }, 98148919Sobrien { "p", db_print_cmd, 0, 0 }, 99148919Sobrien { "examine", db_examine_cmd, CS_SET_DOT, 0 }, 100148919Sobrien { "x", db_examine_cmd, CS_SET_DOT, 0 }, 101148919Sobrien { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 }, 102148919Sobrien { "set", db_set_cmd, CS_OWN, 0 }, 103148919Sobrien { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, 104148919Sobrien { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 }, 105148919Sobrien { "delete", db_delete_cmd, 0, 0 }, 106148919Sobrien { "d", db_delete_cmd, 0, 0 }, 107222801Smarcel { "dump", db_dump, 0, 0 }, 108148919Sobrien { "break", db_breakpoint_cmd, 0, 0 }, 109163135Sbde { "b", db_breakpoint_cmd, 0, 0 }, 110148919Sobrien { "dwatch", db_deletewatch_cmd, 0, 0 }, 111148919Sobrien { "watch", db_watchpoint_cmd, CS_MORE,0 }, 112148919Sobrien { "dhwatch", db_deletehwatch_cmd, 0, 0 }, 113148919Sobrien { "hwatch", db_hwatchpoint_cmd, 0, 0 }, 114148919Sobrien { "step", db_single_step_cmd, 0, 0 }, 115148919Sobrien { "s", db_single_step_cmd, 0, 0 }, 116148919Sobrien { "continue", db_continue_cmd, 0, 0 }, 117148919Sobrien { "c", db_continue_cmd, 0, 0 }, 118148919Sobrien { "until", db_trace_until_call_cmd,0, 0 }, 119148919Sobrien { "next", db_trace_until_matching_cmd,0, 0 }, 120148919Sobrien { "match", db_trace_until_matching_cmd,0, 0 }, 121148919Sobrien { "trace", db_stack_trace, CS_OWN, 0 }, 122163135Sbde { "t", db_stack_trace, CS_OWN, 0 }, 123183054Ssam /* XXX alias for all trace */ 124151622Sjhb { "alltrace", db_stack_trace_all, 0, 0 }, 125148919Sobrien { "where", db_stack_trace, CS_OWN, 0 }, 126151622Sjhb { "bt", db_stack_trace, CS_OWN, 0 }, 127148919Sobrien { "call", db_fncall, CS_OWN, 0 }, 128156412Sjhb { "show", 0, 0, &db_show_table }, 129148919Sobrien { "ps", db_ps, 0, 0 }, 130148919Sobrien { "gdb", db_gdb, 0, 0 }, 131163192Sbde { "halt", db_halt, 0, 0 }, 132163192Sbde { "reboot", db_reset, 0, 0 }, 133148919Sobrien { "reset", db_reset, 0, 0 }, 134148919Sobrien { "kill", db_kill, CS_OWN, 0 }, 135220362Sattilio { "watchdog", db_watchdog, CS_OWN, 0 }, 136148919Sobrien { "thread", db_set_thread, CS_OWN, 0 }, 137174914Srwatson { "run", db_run_cmd, CS_OWN, 0 }, 138174914Srwatson { "script", db_script_cmd, CS_OWN, 0 }, 139174914Srwatson { "scripts", db_scripts_cmd, 0, 0 }, 140174914Srwatson { "unscript", db_unscript_cmd, CS_OWN, 0 }, 141174910Srwatson { "capture", db_capture_cmd, CS_OWN, 0 }, 142174921Srwatson { "textdump", db_textdump_cmd, CS_OWN, 0 }, 143228569Skib { "findstack", db_findstack_cmd, 0, 0 }, 144148919Sobrien}; 145183054Ssamstruct command_table db_cmd_table = LIST_HEAD_INITIALIZER(db_cmd_table); 146148919Sobrien 147148919Sobrienstatic struct command *db_last_command = 0; 148148919Sobrien 1494Srgrimes/* 1504Srgrimes * if 'ed' style: 'dot' is set at start of last item printed, 1514Srgrimes * and '+' points to next line. 1524Srgrimes * Otherwise: 'dot' points to next item, '..' points to last. 1534Srgrimes */ 15412515Sphkstatic boolean_t db_ed_style = TRUE; 1554Srgrimes 1564Srgrimes/* 1574Srgrimes * Utility routine - discard tokens through end-of-line. 1584Srgrimes */ 1594Srgrimesvoid 1604Srgrimesdb_skip_to_eol() 1614Srgrimes{ 1624Srgrimes int t; 1634Srgrimes do { 1644Srgrimes t = db_read_token(); 1654Srgrimes } while (t != tEOL); 1664Srgrimes} 1674Srgrimes 1684Srgrimes/* 1694Srgrimes * Results of command search. 1704Srgrimes */ 1714Srgrimes#define CMD_UNIQUE 0 1724Srgrimes#define CMD_FOUND 1 1734Srgrimes#define CMD_NONE 2 1744Srgrimes#define CMD_AMBIGUOUS 3 1754Srgrimes#define CMD_HELP 4 1764Srgrimes 177156412Sjhbstatic void db_cmd_match(char *name, struct command *cmd, 178156412Sjhb struct command **cmdp, int *resultp); 179156412Sjhbstatic void db_cmd_list(struct command_table *table); 180156412Sjhbstatic int db_cmd_search(char *name, struct command_table *table, 181156412Sjhb struct command **cmdp); 18292756Salfredstatic void db_command(struct command **last_cmdp, 183174914Srwatson struct command_table *cmd_table, int dopager); 18412473Sbde 1854Srgrimes/* 186183054Ssam * Initialize the command lists from the static tables. 187183054Ssam */ 188183360Sjhbvoid 189183360Sjhbdb_command_init(void) 190183054Ssam{ 191183054Ssam#define N(a) (sizeof(a) / sizeof(a[0])) 192183054Ssam int i; 193183054Ssam 194183054Ssam for (i = 0; i < N(db_cmds); i++) 195183054Ssam db_command_register(&db_cmd_table, &db_cmds[i]); 196183054Ssam for (i = 0; i < N(db_show_cmds); i++) 197183054Ssam db_command_register(&db_show_table, &db_show_cmds[i]); 198183054Ssam for (i = 0; i < N(db_show_all_cmds); i++) 199183054Ssam db_command_register(&db_show_all_table, &db_show_all_cmds[i]); 200183054Ssam#undef N 201183054Ssam} 202183054Ssam 203183054Ssam/* 204183054Ssam * Register a command. 205183054Ssam */ 206183054Ssamvoid 207183054Ssamdb_command_register(struct command_table *list, struct command *cmd) 208183054Ssam{ 209183054Ssam struct command *c, *last; 210183054Ssam 211183054Ssam last = NULL; 212183054Ssam LIST_FOREACH(c, list, next) { 213183054Ssam int n = strcmp(cmd->name, c->name); 214183054Ssam 215183054Ssam /* Check that the command is not already present. */ 216183054Ssam if (n == 0) { 217183054Ssam printf("%s: Warning, the command \"%s\" already exists;" 218183054Ssam " ignoring request\n", __func__, cmd->name); 219183054Ssam return; 220183054Ssam } 221183054Ssam if (n < 0) { 222183054Ssam /* NB: keep list sorted lexicographically */ 223183054Ssam LIST_INSERT_BEFORE(c, cmd, next); 224183054Ssam return; 225183054Ssam } 226183054Ssam last = c; 227183054Ssam } 228183054Ssam if (last == NULL) 229183054Ssam LIST_INSERT_HEAD(list, cmd, next); 230183054Ssam else 231183054Ssam LIST_INSERT_AFTER(last, cmd, next); 232183054Ssam} 233183054Ssam 234183054Ssam/* 235183054Ssam * Remove a command previously registered with db_command_register. 236183054Ssam */ 237183054Ssamvoid 238183054Ssamdb_command_unregister(struct command_table *list, struct command *cmd) 239183054Ssam{ 240183054Ssam struct command *c; 241183054Ssam 242183054Ssam LIST_FOREACH(c, list, next) { 243183054Ssam if (cmd == c) { 244183054Ssam LIST_REMOVE(cmd, next); 245183054Ssam return; 246183054Ssam } 247183054Ssam } 248183054Ssam /* NB: intentionally quiet */ 249183054Ssam} 250183054Ssam 251183054Ssam/* 252156412Sjhb * Helper function to match a single command. 2534Srgrimes */ 254156412Sjhbstatic void 255156412Sjhbdb_cmd_match(name, cmd, cmdp, resultp) 2564Srgrimes char * name; 257156412Sjhb struct command *cmd; 2584Srgrimes struct command **cmdp; /* out */ 259156412Sjhb int * resultp; 2604Srgrimes{ 261156412Sjhb char *lp, *rp; 262156412Sjhb int c; 2634Srgrimes 264156412Sjhb lp = name; 265156412Sjhb rp = cmd->name; 266156412Sjhb while ((c = *lp) == *rp) { 2674Srgrimes if (c == 0) { 268156412Sjhb /* complete match */ 269156412Sjhb *cmdp = cmd; 270156412Sjhb *resultp = CMD_UNIQUE; 271156412Sjhb return; 2724Srgrimes } 2734Srgrimes lp++; 2744Srgrimes rp++; 275156412Sjhb } 276156412Sjhb if (c == 0) { 2774Srgrimes /* end of name, not end of command - 2784Srgrimes partial match */ 279156412Sjhb if (*resultp == CMD_FOUND) { 280156412Sjhb *resultp = CMD_AMBIGUOUS; 281156412Sjhb /* but keep looking for a full match - 282156412Sjhb this lets us match single letters */ 283156412Sjhb } else { 284156412Sjhb *cmdp = cmd; 285156412Sjhb *resultp = CMD_FOUND; 2864Srgrimes } 2874Srgrimes } 288156412Sjhb} 28918296Sbde 290156412Sjhb/* 291156412Sjhb * Search for command prefix. 292156412Sjhb */ 293156412Sjhbstatic int 294156412Sjhbdb_cmd_search(name, table, cmdp) 295156412Sjhb char * name; 296156412Sjhb struct command_table *table; 297156412Sjhb struct command **cmdp; /* out */ 298156412Sjhb{ 299156412Sjhb struct command *cmd; 300156412Sjhb int result = CMD_NONE; 301156412Sjhb 302183054Ssam LIST_FOREACH(cmd, table, next) { 303183054Ssam db_cmd_match(name,cmd,cmdp,&result); 304156412Sjhb if (result == CMD_UNIQUE) 305183054Ssam break; 306156412Sjhb } 307183054Ssam 3084Srgrimes if (result == CMD_NONE) { 309156412Sjhb /* check for 'help' */ 3104Srgrimes if (name[0] == 'h' && name[1] == 'e' 3114Srgrimes && name[2] == 'l' && name[3] == 'p') 3124Srgrimes result = CMD_HELP; 3134Srgrimes } 3144Srgrimes return (result); 3154Srgrimes} 3164Srgrimes 31712515Sphkstatic void 318156412Sjhbdb_cmd_list(table) 319156412Sjhb struct command_table *table; 3204Srgrimes{ 321183054Ssam register struct command *cmd; 3224Srgrimes 323183054Ssam LIST_FOREACH(cmd, table, next) { 324183054Ssam db_printf("%-12s", cmd->name); 325183054Ssam db_end_line(12); 3264Srgrimes } 3274Srgrimes} 3284Srgrimes 32912515Sphkstatic void 330174914Srwatsondb_command(last_cmdp, cmd_table, dopager) 3314Srgrimes struct command **last_cmdp; /* IN_OUT */ 332156412Sjhb struct command_table *cmd_table; 333174914Srwatson int dopager; 3344Srgrimes{ 335183054Ssam struct command *cmd = NULL; 3364Srgrimes int t; 3374Srgrimes char modif[TOK_STRING_SIZE]; 3384Srgrimes db_expr_t addr, count; 339798Swollman boolean_t have_addr = FALSE; 3404Srgrimes int result; 3414Srgrimes 3424Srgrimes t = db_read_token(); 3434Srgrimes if (t == tEOL) { 3444Srgrimes /* empty line repeats last command, at 'next' */ 3454Srgrimes cmd = *last_cmdp; 3464Srgrimes addr = (db_expr_t)db_next; 3474Srgrimes have_addr = FALSE; 3484Srgrimes count = 1; 3494Srgrimes modif[0] = '\0'; 3504Srgrimes } 3514Srgrimes else if (t == tEXCL) { 35210348Sbde db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, (char *)0); 3534Srgrimes return; 3544Srgrimes } 3554Srgrimes else if (t != tIDENT) { 3564Srgrimes db_printf("?\n"); 3574Srgrimes db_flush_lex(); 3584Srgrimes return; 3594Srgrimes } 3604Srgrimes else { 3614Srgrimes /* 3624Srgrimes * Search for command 3634Srgrimes */ 3644Srgrimes while (cmd_table) { 3654Srgrimes result = db_cmd_search(db_tok_string, 3664Srgrimes cmd_table, 3674Srgrimes &cmd); 3684Srgrimes switch (result) { 3694Srgrimes case CMD_NONE: 3704Srgrimes db_printf("No such command\n"); 3714Srgrimes db_flush_lex(); 3724Srgrimes return; 3734Srgrimes case CMD_AMBIGUOUS: 3744Srgrimes db_printf("Ambiguous\n"); 3754Srgrimes db_flush_lex(); 3764Srgrimes return; 3774Srgrimes case CMD_HELP: 378156412Sjhb db_cmd_list(cmd_table); 3794Srgrimes db_flush_lex(); 3804Srgrimes return; 3814Srgrimes default: 3824Srgrimes break; 3834Srgrimes } 384156412Sjhb if ((cmd_table = cmd->more) != NULL) { 3854Srgrimes t = db_read_token(); 3864Srgrimes if (t != tIDENT) { 387156412Sjhb db_cmd_list(cmd_table); 3884Srgrimes db_flush_lex(); 3894Srgrimes return; 3904Srgrimes } 3914Srgrimes } 3924Srgrimes } 3934Srgrimes 3944Srgrimes if ((cmd->flag & CS_OWN) == 0) { 3954Srgrimes /* 3964Srgrimes * Standard syntax: 3974Srgrimes * command [/modifier] [addr] [,count] 3984Srgrimes */ 3994Srgrimes t = db_read_token(); 4004Srgrimes if (t == tSLASH) { 4014Srgrimes t = db_read_token(); 4024Srgrimes if (t != tIDENT) { 4034Srgrimes db_printf("Bad modifier\n"); 4044Srgrimes db_flush_lex(); 4054Srgrimes return; 4064Srgrimes } 4074Srgrimes db_strcpy(modif, db_tok_string); 4084Srgrimes } 4094Srgrimes else { 4104Srgrimes db_unread_token(t); 4114Srgrimes modif[0] = '\0'; 4124Srgrimes } 4134Srgrimes 4144Srgrimes if (db_expression(&addr)) { 4154Srgrimes db_dot = (db_addr_t) addr; 4164Srgrimes db_last_addr = db_dot; 4174Srgrimes have_addr = TRUE; 4184Srgrimes } 4194Srgrimes else { 4204Srgrimes addr = (db_expr_t) db_dot; 4214Srgrimes have_addr = FALSE; 4224Srgrimes } 4234Srgrimes t = db_read_token(); 4244Srgrimes if (t == tCOMMA) { 4254Srgrimes if (!db_expression(&count)) { 4264Srgrimes db_printf("Count missing\n"); 4274Srgrimes db_flush_lex(); 4284Srgrimes return; 4294Srgrimes } 4304Srgrimes } 4314Srgrimes else { 4324Srgrimes db_unread_token(t); 4334Srgrimes count = -1; 4344Srgrimes } 4354Srgrimes if ((cmd->flag & CS_MORE) == 0) { 4364Srgrimes db_skip_to_eol(); 4374Srgrimes } 4384Srgrimes } 4394Srgrimes } 4404Srgrimes *last_cmdp = cmd; 4414Srgrimes if (cmd != 0) { 4424Srgrimes /* 4434Srgrimes * Execute the command. 4444Srgrimes */ 445174914Srwatson if (dopager) 446174914Srwatson db_enable_pager(); 447174914Srwatson else 448174914Srwatson db_disable_pager(); 4494Srgrimes (*cmd->fcn)(addr, have_addr, count, modif); 450174914Srwatson if (dopager) 451174914Srwatson db_disable_pager(); 4524Srgrimes 4534Srgrimes if (cmd->flag & CS_SET_DOT) { 4544Srgrimes /* 4554Srgrimes * If command changes dot, set dot to 4564Srgrimes * previous address displayed (if 'ed' style). 4574Srgrimes */ 4584Srgrimes if (db_ed_style) { 4594Srgrimes db_dot = db_prev; 4604Srgrimes } 4614Srgrimes else { 4624Srgrimes db_dot = db_next; 4634Srgrimes } 4644Srgrimes } 4654Srgrimes else { 4664Srgrimes /* 4674Srgrimes * If command does not change dot, 4684Srgrimes * set 'next' location to be the same. 4694Srgrimes */ 4704Srgrimes db_next = db_dot; 4714Srgrimes } 4724Srgrimes } 4734Srgrimes} 4744Srgrimes 4754Srgrimes/* 47633296Sbde * At least one non-optional command must be implemented using 47733296Sbde * DB_COMMAND() so that db_cmd_set gets created. Here is one. 47833296Sbde */ 47933296SbdeDB_COMMAND(panic, db_panic) 4806204Sphk{ 481160505Sjhb db_disable_pager(); 4827170Sdg panic("from debugger"); 4836204Sphk} 4846204Sphk 4856204Sphkvoid 4864Srgrimesdb_command_loop() 4874Srgrimes{ 4884Srgrimes /* 4894Srgrimes * Initialize 'prev' and 'next' to dot. 4904Srgrimes */ 4914Srgrimes db_prev = db_dot; 4924Srgrimes db_next = db_dot; 4934Srgrimes 4944Srgrimes db_cmd_loop_done = 0; 4954Srgrimes while (!db_cmd_loop_done) { 4964Srgrimes if (db_print_position() != 0) 4974Srgrimes db_printf("\n"); 4984Srgrimes 4994Srgrimes db_printf("db> "); 5004Srgrimes (void) db_read_line(); 5014Srgrimes 502183054Ssam db_command(&db_last_command, &db_cmd_table, /* dopager */ 1); 5034Srgrimes } 5044Srgrimes} 5054Srgrimes 506174914Srwatson/* 507174914Srwatson * Execute a command on behalf of a script. The caller is responsible for 508174914Srwatson * making sure that the command string is < DB_MAXLINE or it will be 509174914Srwatson * truncated. 510174914Srwatson * 511174914Srwatson * XXXRW: Runs by injecting faked input into DDB input stream; it would be 512174914Srwatson * nicer to use an alternative approach that didn't mess with the previous 513174914Srwatson * command buffer. 514174914Srwatson */ 5154Srgrimesvoid 516174914Srwatsondb_command_script(const char *command) 517174914Srwatson{ 518174914Srwatson db_prev = db_next = db_dot; 519174914Srwatson db_inject_line(command); 520183054Ssam db_command(&db_last_command, &db_cmd_table, /* dopager */ 0); 521174914Srwatson} 522174914Srwatson 523174914Srwatsonvoid 5244Srgrimesdb_error(s) 525103746Smarkm const char *s; 5264Srgrimes{ 5274Srgrimes if (s) 52879884Skris db_printf("%s", s); 5294Srgrimes db_flush_lex(); 530131952Smarcel kdb_reenter(); 5314Srgrimes} 5324Srgrimes 533222801Smarcelstatic void 534222801Smarceldb_dump(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 535222801Smarcel{ 536222801Smarcel int error; 5374Srgrimes 538242424Salfred if (textdump_pending) { 539242424Salfred db_printf("textdump_pending set.\n" 540242424Salfred "run \"textdump unset\" first or \"textdump dump\" for a textdump.\n"); 541242424Salfred return; 542242424Salfred } 543222801Smarcel error = doadump(FALSE); 544222801Smarcel if (error) { 545222801Smarcel db_printf("Cannot dump: "); 546222801Smarcel switch (error) { 547222801Smarcel case EBUSY: 548222801Smarcel db_printf("debugger got invoked while dumping.\n"); 549222801Smarcel break; 550222801Smarcel case ENXIO: 551222801Smarcel db_printf("no dump device specified.\n"); 552222801Smarcel break; 553222801Smarcel default: 554222801Smarcel db_printf("unknown error (error=%d).\n", error); 555222801Smarcel break; 556222801Smarcel } 557222801Smarcel } 558222801Smarcel} 559222801Smarcel 5604Srgrimes/* 5614Srgrimes * Call random function: 5624Srgrimes * !expr(arg,arg,arg) 5634Srgrimes */ 564147745Smarcel 565147745Smarcel/* The generic implementation supports a maximum of 10 arguments. */ 566147745Smarceltypedef db_expr_t __db_f(db_expr_t, db_expr_t, db_expr_t, db_expr_t, 567147745Smarcel db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t); 568147745Smarcel 569147745Smarcelstatic __inline int 570147745Smarceldb_fncall_generic(db_expr_t addr, db_expr_t *rv, int nargs, db_expr_t args[]) 571147745Smarcel{ 572147745Smarcel __db_f *f = (__db_f *)addr; 573147745Smarcel 574147745Smarcel if (nargs > 10) { 575147745Smarcel db_printf("Too many arguments (max 10)\n"); 576147745Smarcel return (0); 577147745Smarcel } 578147745Smarcel *rv = (*f)(args[0], args[1], args[2], args[3], args[4], args[5], 579147745Smarcel args[6], args[7], args[8], args[9]); 580147745Smarcel return (1); 581147745Smarcel} 582147745Smarcel 58312515Sphkstatic void 58410348Sbdedb_fncall(dummy1, dummy2, dummy3, dummy4) 58510348Sbde db_expr_t dummy1; 58610348Sbde boolean_t dummy2; 58710348Sbde db_expr_t dummy3; 58810348Sbde char * dummy4; 5894Srgrimes{ 5904Srgrimes db_expr_t fn_addr; 591147745Smarcel db_expr_t args[DB_MAXARGS]; 5924Srgrimes int nargs = 0; 5934Srgrimes db_expr_t retval; 5944Srgrimes int t; 5954Srgrimes 5964Srgrimes if (!db_expression(&fn_addr)) { 5974Srgrimes db_printf("Bad function\n"); 5984Srgrimes db_flush_lex(); 5994Srgrimes return; 6004Srgrimes } 6014Srgrimes 6024Srgrimes t = db_read_token(); 6034Srgrimes if (t == tLPAREN) { 6044Srgrimes if (db_expression(&args[0])) { 6054Srgrimes nargs++; 6064Srgrimes while ((t = db_read_token()) == tCOMMA) { 607147745Smarcel if (nargs == DB_MAXARGS) { 608147745Smarcel db_printf("Too many arguments (max %d)\n", DB_MAXARGS); 6094Srgrimes db_flush_lex(); 6104Srgrimes return; 6114Srgrimes } 6124Srgrimes if (!db_expression(&args[nargs])) { 6134Srgrimes db_printf("Argument missing\n"); 6144Srgrimes db_flush_lex(); 6154Srgrimes return; 6164Srgrimes } 6174Srgrimes nargs++; 6184Srgrimes } 6194Srgrimes db_unread_token(t); 6204Srgrimes } 6214Srgrimes if (db_read_token() != tRPAREN) { 6224Srgrimes db_printf("?\n"); 6234Srgrimes db_flush_lex(); 6244Srgrimes return; 6254Srgrimes } 6264Srgrimes } 6274Srgrimes db_skip_to_eol(); 628160505Sjhb db_disable_pager(); 6294Srgrimes 630147745Smarcel if (DB_CALL(fn_addr, &retval, nargs, args)) 631147745Smarcel db_printf("= %#lr\n", (long)retval); 6324Srgrimes} 63317848Spst 63417848Spststatic void 635163192Sbdedb_halt(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 636163192Sbde{ 637163192Sbde 638163192Sbde cpu_halt(); 639163192Sbde} 640163192Sbde 641163192Sbdestatic void 64286998Sdddb_kill(dummy1, dummy2, dummy3, dummy4) 64386998Sdd db_expr_t dummy1; 64486998Sdd boolean_t dummy2; 64586998Sdd db_expr_t dummy3; 64686998Sdd char * dummy4; 64786998Sdd{ 64886998Sdd db_expr_t old_radix, pid, sig; 64986998Sdd struct proc *p; 65086998Sdd 65186998Sdd#define DB_ERROR(f) do { db_printf f; db_flush_lex(); goto out; } while (0) 65286998Sdd 65386998Sdd /* 65486998Sdd * PIDs and signal numbers are typically represented in base 65586998Sdd * 10, so make that the default here. It can, of course, be 65686998Sdd * overridden by specifying a prefix. 65786998Sdd */ 65886998Sdd old_radix = db_radix; 65986998Sdd db_radix = 10; 66086998Sdd /* Retrieve arguments. */ 66186998Sdd if (!db_expression(&sig)) 66286998Sdd DB_ERROR(("Missing signal number\n")); 66386998Sdd if (!db_expression(&pid)) 66486998Sdd DB_ERROR(("Missing process ID\n")); 66586998Sdd db_skip_to_eol(); 666209934Skib if (!_SIG_VALID(sig)) 66786998Sdd DB_ERROR(("Signal number out of range\n")); 66886998Sdd 66986998Sdd /* 67086998Sdd * Find the process in question. allproc_lock is not needed 67186998Sdd * since we're in DDB. 67286998Sdd */ 67386998Sdd /* sx_slock(&allproc_lock); */ 674166074Sdelphij FOREACH_PROC_IN_SYSTEM(p) 67586998Sdd if (p->p_pid == pid) 67686998Sdd break; 67786998Sdd /* sx_sunlock(&allproc_lock); */ 67886998Sdd if (p == NULL) 67989442Smjacob DB_ERROR(("Can't find process with pid %ld\n", (long) pid)); 68086998Sdd 68186998Sdd /* If it's already locked, bail; otherwise, do the deed. */ 68286998Sdd if (PROC_TRYLOCK(p) == 0) 68389442Smjacob DB_ERROR(("Can't lock process with pid %ld\n", (long) pid)); 68486998Sdd else { 685199355Skib pksignal(p, sig, NULL); 68686998Sdd PROC_UNLOCK(p); 68786998Sdd } 68886998Sdd 68986998Sddout: 69086998Sdd db_radix = old_radix; 69186998Sdd#undef DB_ERROR 69286998Sdd} 69386998Sdd 694208509Sbz/* 695208509Sbz * Reboot. In case there is an additional argument, take it as delay in 696208509Sbz * seconds. Default to 15s if we cannot parse it and make sure we will 697208509Sbz * never wait longer than 1 week. Some code is similar to 698208509Sbz * kern_shutdown.c:shutdown_panic(). 699208509Sbz */ 700208509Sbz#ifndef DB_RESET_MAXDELAY 701208509Sbz#define DB_RESET_MAXDELAY (3600 * 24 * 7) 702208509Sbz#endif 703208509Sbz 70486998Sddstatic void 705208509Sbzdb_reset(db_expr_t addr, boolean_t have_addr, db_expr_t count __unused, 706208509Sbz char *modif __unused) 70785944Speter{ 708208509Sbz int delay, loop; 70985944Speter 710208509Sbz if (have_addr) { 711208509Sbz delay = (int)db_hex2dec(addr); 712208509Sbz 713208509Sbz /* If we parse to fail, use 15s. */ 714208509Sbz if (delay == -1) 715208509Sbz delay = 15; 716208509Sbz 717208509Sbz /* Cap at one week. */ 718208509Sbz if ((uintmax_t)delay > (uintmax_t)DB_RESET_MAXDELAY) 719208509Sbz delay = DB_RESET_MAXDELAY; 720208509Sbz 721208509Sbz db_printf("Automatic reboot in %d seconds - " 722208509Sbz "press a key on the console to abort\n", delay); 723208509Sbz for (loop = delay * 10; loop > 0; --loop) { 724208509Sbz DELAY(1000 * 100); /* 1/10th second */ 725208509Sbz /* Did user type a key? */ 726208509Sbz if (cncheckc() != -1) 727208509Sbz return; 728208509Sbz } 729208509Sbz } 730208509Sbz 73185944Speter cpu_reset(); 73285944Speter} 733126399Sphk 734126399Sphkstatic void 735126399Sphkdb_watchdog(dummy1, dummy2, dummy3, dummy4) 736126399Sphk db_expr_t dummy1; 737126399Sphk boolean_t dummy2; 738126399Sphk db_expr_t dummy3; 739126399Sphk char * dummy4; 740126399Sphk{ 741220362Sattilio db_expr_t old_radix, tout; 742220362Sattilio int err, i; 743126399Sphk 744220362Sattilio old_radix = db_radix; 745220362Sattilio db_radix = 10; 746220362Sattilio err = db_expression(&tout); 747220362Sattilio db_skip_to_eol(); 748220362Sattilio db_radix = old_radix; 749126399Sphk 750220362Sattilio /* If no argument is provided the watchdog will just be disabled. */ 751220362Sattilio if (err == 0) { 752220362Sattilio db_printf("No argument provided, disabling watchdog\n"); 753220362Sattilio tout = 0; 754220362Sattilio } else if ((tout & WD_INTERVAL) == WD_TO_NEVER) { 755220362Sattilio db_error("Out of range watchdog interval\n"); 756220362Sattilio return; 757220362Sattilio } 758220362Sattilio EVENTHANDLER_INVOKE(watchdog_list, tout, &i); 759126399Sphk} 760132002Smarcel 761132002Smarcelstatic void 762132002Smarceldb_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 763132002Smarcel{ 764132002Smarcel 765218825Smdf if (kdb_dbbe_select("gdb") != 0) { 766132002Smarcel db_printf("The remote GDB backend could not be selected.\n"); 767218825Smdf return; 768218825Smdf } 769218825Smdf /* 770218825Smdf * Mark that we are done in the debugger. kdb_trap() 771218825Smdf * should re-enter with the new backend. 772218825Smdf */ 773218825Smdf db_cmd_loop_done = 1; 774218825Smdf db_printf("(ctrl-c will return control to ddb)\n"); 775132002Smarcel} 776132482Smarcel 777132482Smarcelstatic void 778132482Smarceldb_stack_trace(db_expr_t tid, boolean_t hastid, db_expr_t count, char *modif) 779132482Smarcel{ 780132482Smarcel struct thread *td; 781132482Smarcel db_expr_t radix; 782138038Srwatson pid_t pid; 783132482Smarcel int t; 784132482Smarcel 785132482Smarcel /* 786132482Smarcel * We parse our own arguments. We don't like the default radix. 787132482Smarcel */ 788132482Smarcel radix = db_radix; 789132482Smarcel db_radix = 10; 790132482Smarcel hastid = db_expression(&tid); 791132482Smarcel t = db_read_token(); 792132482Smarcel if (t == tCOMMA) { 793132482Smarcel if (!db_expression(&count)) { 794132482Smarcel db_printf("Count missing\n"); 795132482Smarcel db_flush_lex(); 796132482Smarcel return; 797132482Smarcel } 798132482Smarcel } else { 799132482Smarcel db_unread_token(t); 800132482Smarcel count = -1; 801132482Smarcel } 802132482Smarcel db_skip_to_eol(); 803132482Smarcel db_radix = radix; 804132482Smarcel 805132482Smarcel if (hastid) { 806132482Smarcel td = kdb_thr_lookup((lwpid_t)tid); 807132482Smarcel if (td == NULL) 808132482Smarcel td = kdb_thr_from_pid((pid_t)tid); 809132482Smarcel if (td == NULL) { 810132482Smarcel db_printf("Thread %d not found\n", (int)tid); 811132482Smarcel return; 812132482Smarcel } 813132482Smarcel } else 814132482Smarcel td = kdb_thread; 815138038Srwatson if (td->td_proc != NULL) 816138038Srwatson pid = td->td_proc->p_pid; 817138038Srwatson else 818138038Srwatson pid = -1; 819138038Srwatson db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td); 820132482Smarcel db_trace_thread(td, count); 821132482Smarcel} 822150819Srwatson 823150819Srwatsonstatic void 824150819Srwatsondb_stack_trace_all(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, 825150819Srwatson char *dummy4) 826150819Srwatson{ 827150819Srwatson struct proc *p; 828150819Srwatson struct thread *td; 829163909Skib jmp_buf jb; 830163909Skib void *prev_jb; 831150819Srwatson 832166074Sdelphij FOREACH_PROC_IN_SYSTEM(p) { 833163909Skib prev_jb = kdb_jmpbuf(jb); 834163909Skib if (setjmp(jb) == 0) { 835163909Skib FOREACH_THREAD_IN_PROC(p, td) { 836163909Skib db_printf("\nTracing command %s pid %d tid %ld td %p\n", 837163909Skib p->p_comm, p->p_pid, (long)td->td_tid, td); 838163909Skib db_trace_thread(td, -1); 839163909Skib if (db_pager_quit) { 840163909Skib kdb_jmpbuf(prev_jb); 841163909Skib return; 842163909Skib } 843163909Skib } 844150819Srwatson } 845163909Skib kdb_jmpbuf(prev_jb); 846150819Srwatson } 847150819Srwatson} 848208509Sbz 849208509Sbz/* 850208509Sbz * Take the parsed expression value from the command line that was parsed 851208509Sbz * as a hexadecimal value and convert it as if the expression was parsed 852208509Sbz * as a decimal value. Returns -1 if the expression was not a valid 853208509Sbz * decimal value. 854208509Sbz */ 855208509Sbzdb_expr_t 856208509Sbzdb_hex2dec(db_expr_t expr) 857208509Sbz{ 858208509Sbz uintptr_t x, y; 859208509Sbz db_expr_t val; 860208509Sbz 861208509Sbz y = 1; 862208509Sbz val = 0; 863208509Sbz x = expr; 864208509Sbz while (x != 0) { 865208509Sbz if (x % 16 > 9) 866208509Sbz return (-1); 867208509Sbz val += (x % 16) * (y); 868208509Sbz x >>= 4; 869208509Sbz y *= 10; 870208509Sbz } 871208509Sbz return (val); 872208509Sbz} 873