PERFORCE change 32119 for review

[Juli Mallett]

http://perforce.freebsd.org/chv.cgi?CH=32119

Change 32119 by jmallett at jmallett_dalek on 2003/05/30 13:29:22

	Enter DDB on breakpoint traps.  This actually works.  It
	also means we have to nest twice, for now.  First the real
	problem, then panic("trap") then the debugger.  This is enough
	to poke around a little.

Affected files ...

.. //depot/projects/mips/sys/mips/mips/trap.c#5 edit

Differences ...

==== //depot/projects/mips/sys/mips/mips/trap.c#5 (text+ko) ====

@@ -25,6 +25,8 @@
  * $FreeBSD$
  */
 
+#include "opt_ddb.h"
+
 #include <sys/param.h>
 #include <sys/kernel.h>
 #include <sys/systm.h>
@@ -98,6 +100,18 @@
 	printf("bad virtual address = %p\n", badvaddr);
 	printf("              cause = %x\n", cause);
 	printf("             status = %lx\n", tf->tf_regs[TF_SR]);
+
+	switch (code) {
+	case T_BREAK:
+#if	DDB
+		kdb_trap(code, tf);
+		break;
+#endif
+	default:
+		goto dopanic;
+	}
+	return;
+dopanic:
 	if (panicstr != NULL) {
 		printf("Double panic, resetting...\n");
 		cpu_reset();