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, 19 insertions, 19 deletions

diff --git a/sys/ddb/db_print.c b/sys/ddb/db_print.c
index 60282ad..b173c8c 100644
--- a/sys/ddb/db_print.c
+++ b/sys/ddb/db_print.c
@@ -37,33 +37,33 @@
 __FBSDID("$FreeBSD$");
 
 #include <sys/param.h>
+#include <sys/kdb.h>
+
+#include <machine/pcb.h>
 
 #include <ddb/ddb.h>
 #include <ddb/db_variables.h>
 #include <ddb/db_sym.h>
 
 void
-db_show_regs(dummy1, dummy2, dummy3, dummy4)
-	db_expr_t	dummy1;
-	boolean_t	dummy2;
-	db_expr_t	dummy3;
-	char *		dummy4;
+db_show_regs(db_expr_t _1, boolean_t _2, db_expr_t _3, char *_4)
 {
-	register struct db_variable *regp;
-	db_expr_t	value, offset;
-	const char *	name;
+	struct db_variable *regp;
+	db_expr_t value, offset;
+	const char *name;
 
 	for (regp = db_regs; regp < db_eregs; regp++) {
-	    db_read_variable(regp, &value);
-	    db_printf("%-12s%#10lr", regp->name, (unsigned long)value);
-	    db_find_xtrn_sym_and_offset((db_addr_t)value, &name, &offset);
-	    if (name != NULL && offset <= (unsigned long)db_maxoff &&
-		offset != value) {
-		db_printf("\t%s", name);
-		if (offset != 0)
-		    db_printf("+%+#lr", (long)offset);
-	    }
-	    db_printf("\n");
+		if (!db_read_variable(regp, &value))
+			continue;
+		db_printf("%-12s%#10lr", regp->name, (unsigned long)value);
+		db_find_xtrn_sym_and_offset((db_addr_t)value, &name, &offset);
+		if (name != NULL && offset <= (unsigned long)db_maxoff &&
+		    offset != value) {
+			db_printf("\t%s", name);
+			if (offset != 0)
+				db_printf("+%+#lr", (long)offset);
+		}
+		db_printf("\n");
 	}
-	db_print_loc_and_inst(PC_REGS(DDB_REGS));
+	db_print_loc_and_inst(PC_REGS());
 }