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 160273265Spfgdb_skip_to_eol(void) 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 255273265Spfgdb_cmd_match(char *name, struct command *cmd, struct command **cmdp, 256273265Spfg int *resultp) 2574Srgrimes{ 258156412Sjhb char *lp, *rp; 259156412Sjhb int c; 2604Srgrimes 261156412Sjhb lp = name; 262156412Sjhb rp = cmd->name; 263156412Sjhb while ((c = *lp) == *rp) { 2644Srgrimes if (c == 0) { 265156412Sjhb /* complete match */ 266156412Sjhb *cmdp = cmd; 267156412Sjhb *resultp = CMD_UNIQUE; 268156412Sjhb return; 2694Srgrimes } 2704Srgrimes lp++; 2714Srgrimes rp++; 272156412Sjhb } 273156412Sjhb if (c == 0) { 2744Srgrimes /* end of name, not end of command - 2754Srgrimes partial match */ 276156412Sjhb if (*resultp == CMD_FOUND) { 277156412Sjhb *resultp = CMD_AMBIGUOUS; 278156412Sjhb /* but keep looking for a full match - 279156412Sjhb this lets us match single letters */ 280156412Sjhb } else { 281156412Sjhb *cmdp = cmd; 282156412Sjhb *resultp = CMD_FOUND; 2834Srgrimes } 2844Srgrimes } 285156412Sjhb} 28618296Sbde 287156412Sjhb/* 288156412Sjhb * Search for command prefix. 289156412Sjhb */ 290156412Sjhbstatic int 291273265Spfgdb_cmd_search(char *name, struct command_table *table, struct command **cmdp) 292156412Sjhb{ 293156412Sjhb struct command *cmd; 294156412Sjhb int result = CMD_NONE; 295156412Sjhb 296183054Ssam LIST_FOREACH(cmd, table, next) { 297183054Ssam db_cmd_match(name,cmd,cmdp,&result); 298156412Sjhb if (result == CMD_UNIQUE) 299183054Ssam break; 300156412Sjhb } 301183054Ssam 3024Srgrimes if (result == CMD_NONE) { 303156412Sjhb /* check for 'help' */ 3044Srgrimes if (name[0] == 'h' && name[1] == 'e' 3054Srgrimes && name[2] == 'l' && name[3] == 'p') 3064Srgrimes result = CMD_HELP; 3074Srgrimes } 3084Srgrimes return (result); 3094Srgrimes} 3104Srgrimes 31112515Sphkstatic void 312273265Spfgdb_cmd_list(struct command_table *table) 3134Srgrimes{ 314183054Ssam register struct command *cmd; 3154Srgrimes 316183054Ssam LIST_FOREACH(cmd, table, next) { 317183054Ssam db_printf("%-12s", cmd->name); 318183054Ssam db_end_line(12); 3194Srgrimes } 3204Srgrimes} 3214Srgrimes 32212515Sphkstatic void 323273265Spfgdb_command(struct command **last_cmdp, struct command_table *cmd_table, 324273265Spfg int dopager) 3254Srgrimes{ 326183054Ssam struct command *cmd = NULL; 3274Srgrimes int t; 3284Srgrimes char modif[TOK_STRING_SIZE]; 3294Srgrimes db_expr_t addr, count; 330798Swollman boolean_t have_addr = FALSE; 3314Srgrimes int result; 3324Srgrimes 3334Srgrimes t = db_read_token(); 3344Srgrimes if (t == tEOL) { 3354Srgrimes /* empty line repeats last command, at 'next' */ 3364Srgrimes cmd = *last_cmdp; 3374Srgrimes addr = (db_expr_t)db_next; 3384Srgrimes have_addr = FALSE; 3394Srgrimes count = 1; 3404Srgrimes modif[0] = '\0'; 3414Srgrimes } 3424Srgrimes else if (t == tEXCL) { 34310348Sbde db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, (char *)0); 3444Srgrimes return; 3454Srgrimes } 3464Srgrimes else if (t != tIDENT) { 3474Srgrimes db_printf("?\n"); 3484Srgrimes db_flush_lex(); 3494Srgrimes return; 3504Srgrimes } 3514Srgrimes else { 3524Srgrimes /* 3534Srgrimes * Search for command 3544Srgrimes */ 3554Srgrimes while (cmd_table) { 3564Srgrimes result = db_cmd_search(db_tok_string, 3574Srgrimes cmd_table, 3584Srgrimes &cmd); 3594Srgrimes switch (result) { 3604Srgrimes case CMD_NONE: 3614Srgrimes db_printf("No such command\n"); 3624Srgrimes db_flush_lex(); 3634Srgrimes return; 3644Srgrimes case CMD_AMBIGUOUS: 3654Srgrimes db_printf("Ambiguous\n"); 3664Srgrimes db_flush_lex(); 3674Srgrimes return; 3684Srgrimes case CMD_HELP: 369156412Sjhb db_cmd_list(cmd_table); 3704Srgrimes db_flush_lex(); 3714Srgrimes return; 3724Srgrimes default: 3734Srgrimes break; 3744Srgrimes } 375156412Sjhb if ((cmd_table = cmd->more) != NULL) { 3764Srgrimes t = db_read_token(); 3774Srgrimes if (t != tIDENT) { 378156412Sjhb db_cmd_list(cmd_table); 3794Srgrimes db_flush_lex(); 3804Srgrimes return; 3814Srgrimes } 3824Srgrimes } 3834Srgrimes } 3844Srgrimes 3854Srgrimes if ((cmd->flag & CS_OWN) == 0) { 3864Srgrimes /* 3874Srgrimes * Standard syntax: 3884Srgrimes * command [/modifier] [addr] [,count] 3894Srgrimes */ 3904Srgrimes t = db_read_token(); 3914Srgrimes if (t == tSLASH) { 3924Srgrimes t = db_read_token(); 3934Srgrimes if (t != tIDENT) { 3944Srgrimes db_printf("Bad modifier\n"); 3954Srgrimes db_flush_lex(); 3964Srgrimes return; 3974Srgrimes } 3984Srgrimes db_strcpy(modif, db_tok_string); 3994Srgrimes } 4004Srgrimes else { 4014Srgrimes db_unread_token(t); 4024Srgrimes modif[0] = '\0'; 4034Srgrimes } 4044Srgrimes 4054Srgrimes if (db_expression(&addr)) { 4064Srgrimes db_dot = (db_addr_t) addr; 4074Srgrimes db_last_addr = db_dot; 4084Srgrimes have_addr = TRUE; 4094Srgrimes } 4104Srgrimes else { 4114Srgrimes addr = (db_expr_t) db_dot; 4124Srgrimes have_addr = FALSE; 4134Srgrimes } 4144Srgrimes t = db_read_token(); 4154Srgrimes if (t == tCOMMA) { 4164Srgrimes if (!db_expression(&count)) { 4174Srgrimes db_printf("Count missing\n"); 4184Srgrimes db_flush_lex(); 4194Srgrimes return; 4204Srgrimes } 4214Srgrimes } 4224Srgrimes else { 4234Srgrimes db_unread_token(t); 4244Srgrimes count = -1; 4254Srgrimes } 4264Srgrimes if ((cmd->flag & CS_MORE) == 0) { 4274Srgrimes db_skip_to_eol(); 4284Srgrimes } 4294Srgrimes } 4304Srgrimes } 4314Srgrimes *last_cmdp = cmd; 4324Srgrimes if (cmd != 0) { 4334Srgrimes /* 4344Srgrimes * Execute the command. 4354Srgrimes */ 436174914Srwatson if (dopager) 437174914Srwatson db_enable_pager(); 438174914Srwatson else 439174914Srwatson db_disable_pager(); 4404Srgrimes (*cmd->fcn)(addr, have_addr, count, modif); 441174914Srwatson if (dopager) 442174914Srwatson db_disable_pager(); 4434Srgrimes 4444Srgrimes if (cmd->flag & CS_SET_DOT) { 4454Srgrimes /* 4464Srgrimes * If command changes dot, set dot to 4474Srgrimes * previous address displayed (if 'ed' style). 4484Srgrimes */ 4494Srgrimes if (db_ed_style) { 4504Srgrimes db_dot = db_prev; 4514Srgrimes } 4524Srgrimes else { 4534Srgrimes db_dot = db_next; 4544Srgrimes } 4554Srgrimes } 4564Srgrimes else { 4574Srgrimes /* 4584Srgrimes * If command does not change dot, 4594Srgrimes * set 'next' location to be the same. 4604Srgrimes */ 4614Srgrimes db_next = db_dot; 4624Srgrimes } 4634Srgrimes } 4644Srgrimes} 4654Srgrimes 4664Srgrimes/* 46733296Sbde * At least one non-optional command must be implemented using 46833296Sbde * DB_COMMAND() so that db_cmd_set gets created. Here is one. 46933296Sbde */ 47033296SbdeDB_COMMAND(panic, db_panic) 4716204Sphk{ 472160505Sjhb db_disable_pager(); 4737170Sdg panic("from debugger"); 4746204Sphk} 4756204Sphk 4766204Sphkvoid 477273265Spfgdb_command_loop(void) 4784Srgrimes{ 4794Srgrimes /* 4804Srgrimes * Initialize 'prev' and 'next' to dot. 4814Srgrimes */ 4824Srgrimes db_prev = db_dot; 4834Srgrimes db_next = db_dot; 4844Srgrimes 4854Srgrimes db_cmd_loop_done = 0; 4864Srgrimes while (!db_cmd_loop_done) { 4874Srgrimes if (db_print_position() != 0) 4884Srgrimes db_printf("\n"); 4894Srgrimes 4904Srgrimes db_printf("db> "); 4914Srgrimes (void) db_read_line(); 4924Srgrimes 493183054Ssam db_command(&db_last_command, &db_cmd_table, /* dopager */ 1); 4944Srgrimes } 4954Srgrimes} 4964Srgrimes 497174914Srwatson/* 498174914Srwatson * Execute a command on behalf of a script. The caller is responsible for 499174914Srwatson * making sure that the command string is < DB_MAXLINE or it will be 500174914Srwatson * truncated. 501174914Srwatson * 502174914Srwatson * XXXRW: Runs by injecting faked input into DDB input stream; it would be 503174914Srwatson * nicer to use an alternative approach that didn't mess with the previous 504174914Srwatson * command buffer. 505174914Srwatson */ 5064Srgrimesvoid 507174914Srwatsondb_command_script(const char *command) 508174914Srwatson{ 509174914Srwatson db_prev = db_next = db_dot; 510174914Srwatson db_inject_line(command); 511183054Ssam db_command(&db_last_command, &db_cmd_table, /* dopager */ 0); 512174914Srwatson} 513174914Srwatson 514174914Srwatsonvoid 515273265Spfgdb_error(const char *s) 5164Srgrimes{ 5174Srgrimes if (s) 51879884Skris db_printf("%s", s); 5194Srgrimes db_flush_lex(); 520131952Smarcel kdb_reenter(); 5214Srgrimes} 5224Srgrimes 523222801Smarcelstatic void 524222801Smarceldb_dump(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 525222801Smarcel{ 526222801Smarcel int error; 5274Srgrimes 528242424Salfred if (textdump_pending) { 529242424Salfred db_printf("textdump_pending set.\n" 530242424Salfred "run \"textdump unset\" first or \"textdump dump\" for a textdump.\n"); 531242424Salfred return; 532242424Salfred } 533222801Smarcel error = doadump(FALSE); 534222801Smarcel if (error) { 535222801Smarcel db_printf("Cannot dump: "); 536222801Smarcel switch (error) { 537222801Smarcel case EBUSY: 538222801Smarcel db_printf("debugger got invoked while dumping.\n"); 539222801Smarcel break; 540222801Smarcel case ENXIO: 541222801Smarcel db_printf("no dump device specified.\n"); 542222801Smarcel break; 543222801Smarcel default: 544222801Smarcel db_printf("unknown error (error=%d).\n", error); 545222801Smarcel break; 546222801Smarcel } 547222801Smarcel } 548222801Smarcel} 549222801Smarcel 5504Srgrimes/* 5514Srgrimes * Call random function: 5524Srgrimes * !expr(arg,arg,arg) 5534Srgrimes */ 554147745Smarcel 555147745Smarcel/* The generic implementation supports a maximum of 10 arguments. */ 556147745Smarceltypedef db_expr_t __db_f(db_expr_t, db_expr_t, db_expr_t, db_expr_t, 557147745Smarcel db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t, db_expr_t); 558147745Smarcel 559147745Smarcelstatic __inline int 560147745Smarceldb_fncall_generic(db_expr_t addr, db_expr_t *rv, int nargs, db_expr_t args[]) 561147745Smarcel{ 562147745Smarcel __db_f *f = (__db_f *)addr; 563147745Smarcel 564147745Smarcel if (nargs > 10) { 565147745Smarcel db_printf("Too many arguments (max 10)\n"); 566147745Smarcel return (0); 567147745Smarcel } 568147745Smarcel *rv = (*f)(args[0], args[1], args[2], args[3], args[4], args[5], 569147745Smarcel args[6], args[7], args[8], args[9]); 570147745Smarcel return (1); 571147745Smarcel} 572147745Smarcel 57312515Sphkstatic void 574273265Spfgdb_fncall(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 5754Srgrimes{ 5764Srgrimes db_expr_t fn_addr; 577147745Smarcel db_expr_t args[DB_MAXARGS]; 5784Srgrimes int nargs = 0; 5794Srgrimes db_expr_t retval; 5804Srgrimes int t; 5814Srgrimes 5824Srgrimes if (!db_expression(&fn_addr)) { 5834Srgrimes db_printf("Bad function\n"); 5844Srgrimes db_flush_lex(); 5854Srgrimes return; 5864Srgrimes } 5874Srgrimes 5884Srgrimes t = db_read_token(); 5894Srgrimes if (t == tLPAREN) { 5904Srgrimes if (db_expression(&args[0])) { 5914Srgrimes nargs++; 5924Srgrimes while ((t = db_read_token()) == tCOMMA) { 593147745Smarcel if (nargs == DB_MAXARGS) { 594147745Smarcel db_printf("Too many arguments (max %d)\n", DB_MAXARGS); 5954Srgrimes db_flush_lex(); 5964Srgrimes return; 5974Srgrimes } 5984Srgrimes if (!db_expression(&args[nargs])) { 5994Srgrimes db_printf("Argument missing\n"); 6004Srgrimes db_flush_lex(); 6014Srgrimes return; 6024Srgrimes } 6034Srgrimes nargs++; 6044Srgrimes } 6054Srgrimes db_unread_token(t); 6064Srgrimes } 6074Srgrimes if (db_read_token() != tRPAREN) { 6084Srgrimes db_printf("?\n"); 6094Srgrimes db_flush_lex(); 6104Srgrimes return; 6114Srgrimes } 6124Srgrimes } 6134Srgrimes db_skip_to_eol(); 614160505Sjhb db_disable_pager(); 6154Srgrimes 616147745Smarcel if (DB_CALL(fn_addr, &retval, nargs, args)) 617147745Smarcel db_printf("= %#lr\n", (long)retval); 6184Srgrimes} 61917848Spst 62017848Spststatic void 621163192Sbdedb_halt(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 622163192Sbde{ 623163192Sbde 624163192Sbde cpu_halt(); 625163192Sbde} 626163192Sbde 627163192Sbdestatic void 628273265Spfgdb_kill(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 62986998Sdd{ 63086998Sdd db_expr_t old_radix, pid, sig; 63186998Sdd struct proc *p; 63286998Sdd 633273265Spfg#define DB_ERROR(f) do { db_printf f; db_flush_lex(); goto out; } while (0) 63486998Sdd 63586998Sdd /* 63686998Sdd * PIDs and signal numbers are typically represented in base 63786998Sdd * 10, so make that the default here. It can, of course, be 63886998Sdd * overridden by specifying a prefix. 63986998Sdd */ 64086998Sdd old_radix = db_radix; 64186998Sdd db_radix = 10; 64286998Sdd /* Retrieve arguments. */ 64386998Sdd if (!db_expression(&sig)) 64486998Sdd DB_ERROR(("Missing signal number\n")); 64586998Sdd if (!db_expression(&pid)) 64686998Sdd DB_ERROR(("Missing process ID\n")); 64786998Sdd db_skip_to_eol(); 648209934Skib if (!_SIG_VALID(sig)) 64986998Sdd DB_ERROR(("Signal number out of range\n")); 65086998Sdd 65186998Sdd /* 65286998Sdd * Find the process in question. allproc_lock is not needed 65386998Sdd * since we're in DDB. 65486998Sdd */ 65586998Sdd /* sx_slock(&allproc_lock); */ 656166074Sdelphij FOREACH_PROC_IN_SYSTEM(p) 65786998Sdd if (p->p_pid == pid) 65886998Sdd break; 65986998Sdd /* sx_sunlock(&allproc_lock); */ 66086998Sdd if (p == NULL) 66189442Smjacob DB_ERROR(("Can't find process with pid %ld\n", (long) pid)); 66286998Sdd 66386998Sdd /* If it's already locked, bail; otherwise, do the deed. */ 66486998Sdd if (PROC_TRYLOCK(p) == 0) 66589442Smjacob DB_ERROR(("Can't lock process with pid %ld\n", (long) pid)); 66686998Sdd else { 667199355Skib pksignal(p, sig, NULL); 66886998Sdd PROC_UNLOCK(p); 66986998Sdd } 67086998Sdd 67186998Sddout: 67286998Sdd db_radix = old_radix; 67386998Sdd#undef DB_ERROR 67486998Sdd} 67586998Sdd 676208509Sbz/* 677208509Sbz * Reboot. In case there is an additional argument, take it as delay in 678208509Sbz * seconds. Default to 15s if we cannot parse it and make sure we will 679208509Sbz * never wait longer than 1 week. Some code is similar to 680208509Sbz * kern_shutdown.c:shutdown_panic(). 681208509Sbz */ 682208509Sbz#ifndef DB_RESET_MAXDELAY 683208509Sbz#define DB_RESET_MAXDELAY (3600 * 24 * 7) 684208509Sbz#endif 685208509Sbz 68686998Sddstatic void 687208509Sbzdb_reset(db_expr_t addr, boolean_t have_addr, db_expr_t count __unused, 688208509Sbz char *modif __unused) 68985944Speter{ 690208509Sbz int delay, loop; 69185944Speter 692208509Sbz if (have_addr) { 693208509Sbz delay = (int)db_hex2dec(addr); 694208509Sbz 695208509Sbz /* If we parse to fail, use 15s. */ 696208509Sbz if (delay == -1) 697208509Sbz delay = 15; 698208509Sbz 699208509Sbz /* Cap at one week. */ 700208509Sbz if ((uintmax_t)delay > (uintmax_t)DB_RESET_MAXDELAY) 701208509Sbz delay = DB_RESET_MAXDELAY; 702208509Sbz 703208509Sbz db_printf("Automatic reboot in %d seconds - " 704208509Sbz "press a key on the console to abort\n", delay); 705208509Sbz for (loop = delay * 10; loop > 0; --loop) { 706208509Sbz DELAY(1000 * 100); /* 1/10th second */ 707208509Sbz /* Did user type a key? */ 708208509Sbz if (cncheckc() != -1) 709208509Sbz return; 710208509Sbz } 711208509Sbz } 712208509Sbz 71385944Speter cpu_reset(); 71485944Speter} 715126399Sphk 716126399Sphkstatic void 717273265Spfgdb_watchdog(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 718126399Sphk{ 719220362Sattilio db_expr_t old_radix, tout; 720220362Sattilio int err, i; 721126399Sphk 722220362Sattilio old_radix = db_radix; 723220362Sattilio db_radix = 10; 724220362Sattilio err = db_expression(&tout); 725220362Sattilio db_skip_to_eol(); 726220362Sattilio db_radix = old_radix; 727126399Sphk 728220362Sattilio /* If no argument is provided the watchdog will just be disabled. */ 729220362Sattilio if (err == 0) { 730220362Sattilio db_printf("No argument provided, disabling watchdog\n"); 731220362Sattilio tout = 0; 732220362Sattilio } else if ((tout & WD_INTERVAL) == WD_TO_NEVER) { 733220362Sattilio db_error("Out of range watchdog interval\n"); 734220362Sattilio return; 735220362Sattilio } 736220362Sattilio EVENTHANDLER_INVOKE(watchdog_list, tout, &i); 737126399Sphk} 738132002Smarcel 739132002Smarcelstatic void 740132002Smarceldb_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4) 741132002Smarcel{ 742132002Smarcel 743218825Smdf if (kdb_dbbe_select("gdb") != 0) { 744132002Smarcel db_printf("The remote GDB backend could not be selected.\n"); 745218825Smdf return; 746218825Smdf } 747218825Smdf /* 748218825Smdf * Mark that we are done in the debugger. kdb_trap() 749218825Smdf * should re-enter with the new backend. 750218825Smdf */ 751218825Smdf db_cmd_loop_done = 1; 752218825Smdf db_printf("(ctrl-c will return control to ddb)\n"); 753132002Smarcel} 754132482Smarcel 755132482Smarcelstatic void 756132482Smarceldb_stack_trace(db_expr_t tid, boolean_t hastid, db_expr_t count, char *modif) 757132482Smarcel{ 758132482Smarcel struct thread *td; 759132482Smarcel db_expr_t radix; 760138038Srwatson pid_t pid; 761132482Smarcel int t; 762132482Smarcel 763132482Smarcel /* 764132482Smarcel * We parse our own arguments. We don't like the default radix. 765132482Smarcel */ 766132482Smarcel radix = db_radix; 767132482Smarcel db_radix = 10; 768132482Smarcel hastid = db_expression(&tid); 769132482Smarcel t = db_read_token(); 770132482Smarcel if (t == tCOMMA) { 771132482Smarcel if (!db_expression(&count)) { 772132482Smarcel db_printf("Count missing\n"); 773132482Smarcel db_flush_lex(); 774132482Smarcel return; 775132482Smarcel } 776132482Smarcel } else { 777132482Smarcel db_unread_token(t); 778132482Smarcel count = -1; 779132482Smarcel } 780132482Smarcel db_skip_to_eol(); 781132482Smarcel db_radix = radix; 782132482Smarcel 783132482Smarcel if (hastid) { 784132482Smarcel td = kdb_thr_lookup((lwpid_t)tid); 785132482Smarcel if (td == NULL) 786132482Smarcel td = kdb_thr_from_pid((pid_t)tid); 787132482Smarcel if (td == NULL) { 788132482Smarcel db_printf("Thread %d not found\n", (int)tid); 789132482Smarcel return; 790132482Smarcel } 791132482Smarcel } else 792132482Smarcel td = kdb_thread; 793138038Srwatson if (td->td_proc != NULL) 794138038Srwatson pid = td->td_proc->p_pid; 795138038Srwatson else 796138038Srwatson pid = -1; 797138038Srwatson db_printf("Tracing pid %d tid %ld td %p\n", pid, (long)td->td_tid, td); 798132482Smarcel db_trace_thread(td, count); 799132482Smarcel} 800150819Srwatson 801150819Srwatsonstatic void 802150819Srwatsondb_stack_trace_all(db_expr_t dummy, boolean_t dummy2, db_expr_t dummy3, 803150819Srwatson char *dummy4) 804150819Srwatson{ 805150819Srwatson struct proc *p; 806150819Srwatson struct thread *td; 807163909Skib jmp_buf jb; 808163909Skib void *prev_jb; 809150819Srwatson 810166074Sdelphij FOREACH_PROC_IN_SYSTEM(p) { 811163909Skib prev_jb = kdb_jmpbuf(jb); 812163909Skib if (setjmp(jb) == 0) { 813163909Skib FOREACH_THREAD_IN_PROC(p, td) { 814163909Skib db_printf("\nTracing command %s pid %d tid %ld td %p\n", 815163909Skib p->p_comm, p->p_pid, (long)td->td_tid, td); 816163909Skib db_trace_thread(td, -1); 817163909Skib if (db_pager_quit) { 818163909Skib kdb_jmpbuf(prev_jb); 819163909Skib return; 820163909Skib } 821163909Skib } 822150819Srwatson } 823163909Skib kdb_jmpbuf(prev_jb); 824150819Srwatson } 825150819Srwatson} 826208509Sbz 827208509Sbz/* 828208509Sbz * Take the parsed expression value from the command line that was parsed 829208509Sbz * as a hexadecimal value and convert it as if the expression was parsed 830208509Sbz * as a decimal value. Returns -1 if the expression was not a valid 831208509Sbz * decimal value. 832208509Sbz */ 833208509Sbzdb_expr_t 834208509Sbzdb_hex2dec(db_expr_t expr) 835208509Sbz{ 836208509Sbz uintptr_t x, y; 837208509Sbz db_expr_t val; 838208509Sbz 839208509Sbz y = 1; 840208509Sbz val = 0; 841208509Sbz x = expr; 842208509Sbz while (x != 0) { 843208509Sbz if (x % 16 > 9) 844208509Sbz return (-1); 845208509Sbz val += (x % 16) * (y); 846208509Sbz x >>= 4; 847208509Sbz y *= 10; 848208509Sbz } 849208509Sbz return (val); 850208509Sbz} 851