1 /* $NetBSD: userret.h,v 1.14 2016/11/02 00:11:59 pgoyette Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah Hdr: trap.c 1.32 91/04/06 37 * 38 * @(#)trap.c 8.5 (Berkeley) 1/11/94 39 */ 40 41 #ifndef _SH3_USERRET_H_ 42 #define _SH3_USERRET_H_ 43 44 #include <sys/userret.h> 45 46 #include <sh3/ubcreg.h> 47 #include "opt_ptrace.h" 48 49 50 static __inline void 51 userret(struct lwp *l) 52 { 53 54 /* Invoke MI userret code */ 55 mi_userret(l); 56 57 #ifdef PTRACE_HOOKS 58 /* Check if lwp is being PT_STEP'ed */ 59 if (l->l_md.md_flags & MDL_SSTEP) { 60 struct trapframe *tf = l->l_md.md_regs; 61 62 /* 63 * Channel A is set up for single stepping in sh_cpu_init(). 64 * Before RTE we write tf_ubc to BBRA and tf_spc to BARA. 65 */ 66 #ifdef SH3 67 if (CPU_IS_SH3) { 68 tf->tf_ubc = UBC_CYCLE_INSN | UBC_CYCLE_READ 69 | SH3_UBC_CYCLE_CPU; 70 } 71 #endif 72 #ifdef SH4 73 if (CPU_IS_SH4) { 74 tf->tf_ubc = UBC_CYCLE_INSN | UBC_CYCLE_READ; 75 } 76 #endif 77 } 78 #endif /* PTRACE_HOOKS */ 79 } 80 81 #endif /* !_SH3_USERRET_H_ */ 82