/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1993, Garrett A. Wollman. * Copyright (c) 1993, University of Vermont and State Agricultural College. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Necessary declarations for the `ddb' kernel debugger. */ #ifndef _DDB_DDB_H_ #define _DDB_DDB_H_ #ifdef SYSCTL_DECL SYSCTL_DECL(_debug_ddb); #endif #include /* type definitions */ #include /* LIST_* */ #include /* SYSINIT */ #ifndef DB_MAXARGS #define DB_MAXARGS 10 #endif #ifndef DB_MAXLINE #define DB_MAXLINE 120 #endif #ifndef DB_MAXSCRIPTS #define DB_MAXSCRIPTS 8 #endif #ifndef DB_MAXSCRIPTNAME #define DB_MAXSCRIPTNAME 32 #endif #ifndef DB_MAXSCRIPTLEN #define DB_MAXSCRIPTLEN 128 #endif #ifndef DB_MAXSCRIPTRECURSION #define DB_MAXSCRIPTRECURSION 3 #endif #ifndef DB_CALL #define DB_CALL db_fncall_generic #else int DB_CALL(db_expr_t, db_expr_t *, int, db_expr_t[]); #endif /* * Extern variables to set the address and size of the symtab and strtab. * Most users should use db_fetch_symtab in order to set them from the * boot loader provided values. */ extern vm_offset_t ksymtab, kstrtab, ksymtab_size, ksymtab_relbase; /* Command tables contain a list of commands. */ struct db_command; LIST_HEAD(db_command_table, db_command); #define _DB_TABLE_NAME(table) db_##table##_table #define DB_DEFINE_TABLE(parent, name, table) \ struct db_command_table _DB_TABLE_NAME(table) = \ LIST_HEAD_INITIALIZER(_DB_TABLE_NAME(table)); \ _DB_SET(parent, name, NULL, 0, &_DB_TABLE_NAME(table)) #define DB_DECLARE_TABLE(table) \ extern struct db_command_table _DB_TABLE_NAME(table) /* * Builtin command tables: * - cmd: Top-level command table; a list of these is displayed * by typing 'help' at the debugger prompt. * - show: Sub-commands of 'show' * - show_all: Sub-commands of 'show all' * - show_active: Sub-commands of 'show active' */ DB_DECLARE_TABLE(cmd); DB_DECLARE_TABLE(show); DB_DECLARE_TABLE(show_all); DB_DECLARE_TABLE(show_active); /* * Type signature for a function implementing a ddb command. */ typedef void db_cmdfcn_t(db_expr_t addr, bool have_addr, db_expr_t count, char *modif); /* * Command table entry. */ struct db_command { char *name; /* command name */ db_cmdfcn_t *fcn; /* function to call */ int flag; #define CS_OWN 0x1 /* non-standard syntax */ #define CS_MORE 0x2 /* standard syntax, but may have other words * at end */ #define CS_SET_DOT 0x100 /* set dot after command */ #define DB_CMD_MEMSAFE 0x1000 /* Command does not allow reads or writes to * arbitrary memory. */ #define DB_MAC1 0x10000 /* For MAC policy use */ #define DB_MAC2 0x20000 struct db_command_table *more; /* another level of command */ LIST_ENTRY(db_command) next; /* next entry in the command table */ void *mac_priv; /* For MAC policy use */ }; /* * Arrange for the specified ddb command to be defined and * bound to the specified function. Commands can be defined * in modules in which case they will be available only when * the module is loaded. */ #define _DB_SET(_table, _name, _func, _flag, _more) \ static struct db_command db_##_table##_##_name##_cmd = { \ .name = __STRING(_name), \ .fcn = _func, \ .flag = _flag, \ .more = _more \ }; \ \ static void \ db##_table##_##_name##_add(void *arg __unused) \ { \ db_command_register(&_DB_TABLE_NAME(_table), \ &db_##_table##_##_name##_cmd); \ } \ SYSINIT(db_##_table##_##_name, SI_SUB_KLD, SI_ORDER_ANY, \ db##_table##_##_name##_add, NULL); \ \ static void \ db##_table##_##_name##_del(void *arg __unused) \ { \ db_command_unregister(&_DB_TABLE_NAME(_table), \ &db_##_table##_##_name##_cmd); \ } \ SYSUNINIT(db_##_table##_##_name, SI_SUB_KLD, SI_ORDER_ANY, \ db##_table##_##_name##_del, NULL) /* * Like _DB_SET but also create the function declaration which * must be followed immediately by the body; e.g. * DB_TABLE_COMMAND_FLAGS(_cmd, panic, db_panic, 0) * { * ...panic implementation... * } * * This macro is mostly used to define commands placed in one of * the ddb command tables; see DB_COMMAND, etc. below. */ #define DB_TABLE_COMMAND_FLAGS(_table, _name, _func, _flag) \ static db_cmdfcn_t _func; \ _DB_SET(_table, _name, _func, _flag, NULL); \ static void \ _func(db_expr_t addr, bool have_addr, db_expr_t count, char *modif) #define DB_TABLE_COMMAND(_table, _name, _func) \ DB_TABLE_COMMAND_FLAGS(_table, _name, _func, 0) /* Wrappers around _DB_SET used for aliases. */ #define DB_TABLE_ALIAS_FLAGS(_table, _name, _func, _flag) \ _DB_SET(_table, _name, _func, _flag, NULL) #define DB_TABLE_ALIAS(_table, _name, _func) \ DB_TABLE_ALIAS_FLAGS(_table, _name, _func, 0) #define DB_COMMAND_FLAGS(cmd_name, func_name, flags) \ DB_TABLE_COMMAND_FLAGS(cmd, cmd_name, func_name, flags) #define DB_COMMAND(cmd_name, func_name) \ DB_COMMAND_FLAGS(cmd_name, func_name, 0) #define DB_ALIAS_FLAGS(alias_name, func_name, flags) \ DB_TABLE_ALIAS_FLAGS(cmd, alias_name, func_name, flags) #define DB_ALIAS(alias_name, func_name) \ DB_ALIAS_FLAGS(alias_name, func_name, 0) #define DB_SHOW_COMMAND_FLAGS(cmd_name, func_name, flags) \ DB_TABLE_COMMAND_FLAGS(show, cmd_name, func_name, flags) #define DB_SHOW_COMMAND(cmd_name, func_name) \ DB_SHOW_COMMAND_FLAGS(cmd_name, func_name, 0) #define DB_SHOW_ALIAS_FLAGS(alias_name, func_name, flags) \ DB_TABLE_ALIAS_FLAGS(show, alias_name, func_name, flags) #define DB_SHOW_ALIAS(alias_name, func_name) \ DB_SHOW_ALIAS_FLAGS(alias_name, func_name, 0) #define DB_SHOW_ALL_COMMAND(cmd_name, func_name) \ DB_TABLE_COMMAND_FLAGS(show_all, cmd_name, func_name, DB_CMD_MEMSAFE) #define DB_SHOW_ALL_ALIAS(alias_name, func_name) \ DB_TABLE_ALIAS_FLAGS(show_all, alias_name, func_name, DB_CMD_MEMSAFE) extern db_expr_t db_maxoff; extern int db_indent; extern int db_inst_count; extern int db_load_count; extern int db_store_count; extern volatile int db_pager_quit; extern db_expr_t db_radix; extern db_expr_t db_max_width; extern db_expr_t db_tab_stop_width; extern db_expr_t db_lines_per_page; struct thread; struct vm_map; void db_check_interrupt(void); void db_clear_watchpoints(void); db_addr_t db_disasm(db_addr_t loc, bool altfmt); /* instruction disassembler */ void db_error(const char *s) __dead2; int db_expression(db_expr_t *valuep); int db_getc(void); int db_get_variable(db_expr_t *valuep); void db_iprintf(const char *,...) __printflike(1, 2); struct proc *db_lookup_proc(db_expr_t addr); struct thread *db_lookup_thread(db_expr_t addr, bool check_pid); struct vm_map *db_map_addr(vm_offset_t); bool db_map_current(struct vm_map *); bool db_map_equal(struct vm_map *, struct vm_map *); void db_md_list_watchpoints(void); void db_print_loc_and_inst(db_addr_t loc); void db_print_thread(void); int db_printf(const char *fmt, ...) __printflike(1, 2); int db_read_bytes(vm_offset_t addr, size_t size, char *data); /* machine-dependent */ int db_readline(char *lstart, int lsize); void db_restart_at_pc(bool watchpt); int db_set_variable(db_expr_t value); void db_set_watchpoints(void); void db_skip_to_eol(void); bool db_stop_at_pc(int type, int code, bool *is_breakpoint, bool *is_watchpoint); #define db_strcpy strcpy void db_trace_self(void); int db_trace_thread(struct thread *, int); bool db_value_of_name(const char *name, db_expr_t *valuep); bool db_value_of_name_pcpu(const char *name, db_expr_t *valuep); bool db_value_of_name_vnet(const char *name, db_expr_t *valuep); int db_write_bytes(vm_offset_t addr, size_t size, char *data); void db_command_register(struct db_command_table *, struct db_command *); void db_command_unregister(struct db_command_table *, struct db_command *); int db_fetch_ksymtab(vm_offset_t ksym_start, vm_offset_t ksym_end, vm_offset_t relbase); db_cmdfcn_t db_breakpoint_cmd; db_cmdfcn_t db_capture_cmd; db_cmdfcn_t db_continue_cmd; db_cmdfcn_t db_delete_cmd; db_cmdfcn_t db_deletehwatch_cmd; db_cmdfcn_t db_deletewatch_cmd; db_cmdfcn_t db_examine_cmd; db_cmdfcn_t db_findstack_cmd; db_cmdfcn_t db_hwatchpoint_cmd; db_cmdfcn_t db_listbreak_cmd; db_cmdfcn_t db_scripts_cmd; db_cmdfcn_t db_print_cmd; db_cmdfcn_t db_ps; db_cmdfcn_t db_run_cmd; db_cmdfcn_t db_script_cmd; db_cmdfcn_t db_search_cmd; db_cmdfcn_t db_set_cmd; db_cmdfcn_t db_set_thread; db_cmdfcn_t db_show_regs; db_cmdfcn_t db_show_threads; db_cmdfcn_t db_single_step_cmd; db_cmdfcn_t db_textdump_cmd; db_cmdfcn_t db_trace_until_call_cmd; db_cmdfcn_t db_trace_until_matching_cmd; db_cmdfcn_t db_unscript_cmd; db_cmdfcn_t db_watchpoint_cmd; db_cmdfcn_t db_write_cmd; db_cmdfcn_t db_pprint_cmd; #ifdef HAS_HW_BREAKPOINT void db_md_list_breakpoints(void); db_cmdfcn_t db_deletehbreak_cmd; db_cmdfcn_t db_hbreakpoint_cmd; #endif /* * Interface between DDB and the DDB output capture facility. */ struct dumperinfo; void db_capture_dump(struct dumperinfo *di); void db_capture_enterpager(void); void db_capture_exitpager(void); void db_capture_write(char *buffer, u_int buflen); void db_capture_writech(char ch); /* * Interface between DDB and the script facility. */ void db_script_kdbenter(const char *eventname); /* KDB enter event. */ /* * Interface between DDB and the textdump facility. * * Text dump blocks are of a fixed size; textdump_block_buffer is a * statically allocated buffer that code interacting with textdumps can use * to prepare and hold a pending block in when calling writenextblock(). */ #define TEXTDUMP_BLOCKSIZE 512 extern char textdump_block_buffer[TEXTDUMP_BLOCKSIZE]; void textdump_mkustar(char *block_buffer, const char *filename, u_int size); void textdump_restoreoff(off_t offset); void textdump_saveoff(off_t *offsetp); int textdump_writenextblock(struct dumperinfo *di, char *buffer); /* * Interface between the kernel and textdumps. */ extern int textdump_pending; /* Call textdump_dumpsys() instead. */ void textdump_dumpsys(struct dumperinfo *di); #endif /* !_DDB_DDB_H_ */