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