Mega update for the KDB framework: turn DDB into a KDB backend.

Most of the changes are a direct result of adding thread awareness.
Typically, DDB_REGS is gone. All registers are taken from the
trapframe and backtraces use the PCB based contexts. DDB_REGS was
defined to be a trapframe on all platforms anyway.
Thread awareness introduces the following new commands:
	thread X	switch to thread X (where X is the TID),
	show threads	list all threads.

The backtrace code has been made more flexible so that one can
create backtraces for any thread by giving the thread ID as an
argument to trace.

With this change, ia64 has support for breakpoints.

1 files changed, 9 insertions, 33 deletions

diff --git a/sys/ddb/ddb.h b/sys/ddb/ddb.h
index 1ef452c..c1ffff9 100644
--- a/sys/ddb/ddb.h
+++ b/sys/ddb/ddb.h
@@ -69,9 +69,7 @@ func_name(addr, have_addr, count, modif)			\
 	db_expr_t count;					\
 	char *modif;
 
-extern char *esym;
 extern db_expr_t db_maxoff;
-extern int db_active;
 extern int db_indent;
 extern int db_inst_count;
 extern int db_load_count;
@@ -81,11 +79,9 @@ extern db_expr_t db_radix;
 extern db_expr_t db_max_width;
 extern db_expr_t db_tab_stop_width;
 
+struct thread;
 struct vm_map;
 
-#ifdef ALT_BREAK_TO_DEBUGGER
-int		db_alt_break(int, int *);
-#endif
 void		db_check_interrupt(void);
 void		db_clear_watchpoints(void);
 db_addr_t	db_disasm(db_addr_t loc, boolean_t altfmt);
@@ -98,24 +94,23 @@ struct vm_map	*db_map_addr(vm_offset_t);
 boolean_t	db_map_current(struct vm_map *);
 boolean_t	db_map_equal(struct vm_map *, struct vm_map *);
 void		db_print_loc_and_inst(db_addr_t loc);
+void		db_print_thread(void);
 void		db_printf(const char *fmt, ...) __printflike(1, 2);
-void		db_read_bytes(vm_offset_t addr, size_t size, char *data);
+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(boolean_t watchpt);
+int		db_set_variable(db_expr_t value);
 void		db_set_watchpoints(void);
 void		db_setup_paging(db_page_calloutfcn_t *callout, void *arg,
 				int maxlines);
 void		db_skip_to_eol(void);
 boolean_t	db_stop_at_pc(boolean_t *is_breakpoint);
 #define		db_strcpy	strcpy
-void		db_trap(int type, int code);
+void		db_trace_self(void);
+int		db_trace_thread(struct thread *, int);
 int		db_value_of_name(const char *name, db_expr_t *valuep);
-void		db_write_bytes(vm_offset_t addr, size_t size, char *data);
-				/* machine-dependent */
-void		db_stack_thread(db_expr_t addr, boolean_t have_addr,
-				db_expr_t count, char *modif);
-void		kdb_init(void);
+int		db_write_bytes(vm_offset_t addr, size_t size, char *data);
 
 db_cmdfcn_t	db_breakpoint_cmd;
 db_cmdfcn_t	db_continue_cmd;
@@ -129,27 +124,18 @@ db_cmdfcn_t	db_print_cmd;
 db_cmdfcn_t	db_ps;
 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_stack_trace_cmd;
 db_cmdfcn_t	db_trace_until_call_cmd;
 db_cmdfcn_t	db_trace_until_matching_cmd;
 db_cmdfcn_t	db_watchpoint_cmd;
 db_cmdfcn_t	db_write_cmd;
-db_cmdfcn_t	db_show_one_thread;
-
-#if 0
-db_cmdfcn_t	db_help_cmd;
-db_cmdfcn_t	db_show_all_threads;
-db_cmdfcn_t	ipc_port_print;
-db_cmdfcn_t	vm_page_print;
-#endif
 
 db_page_calloutfcn_t db_simple_pager;
 
-/* Scare the user with backtrace of curthread to console. */
-void		db_print_backtrace(void);
-
 /*
  * Command table.
  */
@@ -164,14 +150,4 @@ struct command {
 	struct command *more;	/* another level of command */
 };
 
-/* XXX: UGLY hack */
-#ifdef CN_DEAD
-/*
- * Routines to support GDB on an sio port.
- */
-extern void	 *gdb_arg;
-extern cn_getc_t *gdb_getc;
-extern cn_putc_t *gdb_putc;
-#endif
-
 #endif /* !_DDB_DDB_H_ */