1/* $FreeBSD: head/sys/powerpc/aim/trap_subr64.S 275268 2014-11-29 20:54:33Z jhibbits $ */
2/* $NetBSD: trap_subr.S,v 1.20 2002/04/22 23:20:08 kleink Exp $ */
3
4/*-
5 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
6 * Copyright (C) 1995, 1996 TooLs GmbH.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without

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794 */
795 .globl CNAME(dblow),CNAME(dbsize)
796CNAME(dblow):
797 mtsprg1 %r1 /* save SP */
798 mtsprg2 %r29 /* save r29 */
799 mfcr %r29 /* save CR in r29 */
800 mfsrr1 %r1
801 mtcr %r1
802 bf 17,1f /* branch if privileged */
803
804 /* Unprivileged case */
805 mtcr %r29 /* put the condition register back */
806 mfsprg2 %r29 /* ... and r29 */
807 mflr %r1 /* save LR */
808 mtsprg2 %r1 /* And then in SPRG2 */
809 li %r1, 0 /* How to get the vector from LR */
810
811 bla generictrap /* and we look like a generic trap */
8121:
813 GET_CPUINFO(%r1)
814 std %r27,(PC_DBSAVE+CPUSAVE_R27)(%r1) /* free r27 */
815 std %r28,(PC_DBSAVE+CPUSAVE_R28)(%r1) /* free r28 */
816 mfsprg2 %r28 /* r29 holds cr... */
817 std %r28,(PC_DBSAVE+CPUSAVE_R29)(%r1) /* free r29 */
818 std %r30,(PC_DBSAVE+CPUSAVE_R30)(%r1) /* free r30 */
819 std %r31,(PC_DBSAVE+CPUSAVE_R31)(%r1) /* free r31 */
820 mflr %r28 /* save LR */
821 bla dbtrap
822CNAME(dbsize) = .-CNAME(dblow)
823#endif /* KDB */