D26004.diff
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	Index: head/sys/powerpc/powerpc/trap.c
	===================================================================
	--- head/sys/powerpc/powerpc/trap.c
	+++ head/sys/powerpc/powerpc/trap.c
	@@ -153,6 +153,11 @@
	{ EXC_LAST, NULL }
	};

	+static int uprintf_signal;
	+SYSCTL_INT(_machdep, OID_AUTO, uprintf_signal, CTLFLAG_RWTUN,
	+ &uprintf_signal, 0,
	+ "Print debugging information on trap signal to ctty");
	+
	#define ESR_BITMASK \
	"\20" \
	"\040b0\037b1\036b2\035b3\034PIL\033PRR\032PTR\031FP" \
	@@ -489,6 +494,14 @@
	ksi.ksi_code = (int) ucode; /* XXX, not POSIX */
	ksi.ksi_addr = (void *)addr;
	ksi.ksi_trapno = type;
	+ if (uprintf_signal) {
	+ uprintf("pid %d comm %s: signal %d code %d type %d "
	+ "addr 0x%lx r1 0x%lx srr0 0x%lx srr1 0x%lx\n",
	+ p->p_pid, p->p_comm, sig, ucode, type,
	+ (u_long)addr, (u_long)frame->fixreg[1],
	+ (u_long)frame->srr0, (u_long)frame->srr1);
	+ }
	+
	trapsignal(td, &ksi);
	}