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Index: sys/amd64/amd64/trap.c
===================================================================
--- sys/amd64/amd64/trap.c
+++ sys/amd64/amd64/trap.c
@@ -811,9 +811,19 @@
curproc->p_pid, curthread->td_name);
#ifdef KDB
- if (debugger_on_panic || kdb_active)
- if (kdb_trap(type, 0, frame))
+ if (debugger_on_panic || kdb_active) {
+ bool handled;
+ bool reenter;
+
+ reenter = kdb_active;
+ if (!reenter)
+ kdb_why = KDB_WHY_TRAP;
+ handled = kdb_trap(type, 0, frame);
+ if (!reenter)
+ kdb_why = KDB_WHY_UNSET;
+ if (handled)
return;
+ }
#endif
printf("trap number = %d\n", type);
if (type <= MAX_TRAP_MSG)
Index: sys/i386/i386/trap.c
===================================================================
--- sys/i386/i386/trap.c
+++ sys/i386/i386/trap.c
@@ -938,12 +938,19 @@
#ifdef KDB
if (debugger_on_panic || kdb_active) {
+ bool handled;
+ bool reenter;
+
+ reenter = kdb_active;
+ if (!reenter)
+ kdb_why = KDB_WHY_TRAP;
frame->tf_err = eva; /* smuggle fault address to ddb */
- if (kdb_trap(type, 0, frame)) {
- frame->tf_err = code; /* restore error code */
+ handled = kdb_trap(type, 0, frame);
+ frame->tf_err = code; /* restore error code */
+ if (!reenter)
+ kdb_why = KDB_WHY_UNSET;
+ if (handled)
return;
- }
- frame->tf_err = code; /* restore error code */
}
#endif
printf("trap number = %d\n", type);
Index: sys/powerpc/powerpc/trap.c
===================================================================
--- sys/powerpc/powerpc/trap.c
+++ sys/powerpc/powerpc/trap.c
@@ -452,9 +452,19 @@
printtrap(frame->exc, frame, 1, (frame->srr1 & PSL_PR));
#ifdef KDB
- if ((debugger_on_panic || kdb_active) &&
- kdb_trap(frame->exc, 0, frame))
- return;
+ if (debugger_on_panic || kdb_active) {
+ bool handled;
+ bool reenter;
+
+ reenter = kdb_active;
+ if (!reenter)
+ kdb_why = KDB_WHY_TRAP;
+ handled = kdb_trap(frame->exc, 0, frame);
+ if (!reenter)
+ kdb_why = KDB_WHY_UNSET;
+ if (handled)
+ return;
+ }
#endif
panic("%s trap", trapname(frame->exc));
}
Index: sys/sys/kdb.h
===================================================================
--- sys/sys/kdb.h
+++ sys/sys/kdb.h
@@ -101,6 +101,7 @@
#define KDB_WHY_UNSET NULL /* No reason set. */
#define KDB_WHY_PANIC "panic" /* panic() was called. */
#define KDB_WHY_KASSERT "kassert" /* kassert failed. */
+#define KDB_WHY_TRAP "trap" /* Fatal trap. */
#define KDB_WHY_SYSCTL "sysctl" /* Sysctl entered debugger. */
#define KDB_WHY_BOOTFLAGS "bootflags" /* Boot flags were set. */
#define KDB_WHY_WITNESS "witness" /* Witness entered debugger. */

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