1 /* $NetBSD: userret.h,v 1.18 2020/01/07 07:41:20 skrll 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
userret(struct lwp * l)51 userret(struct lwp *l)
52 {
53
54 /* This must come first... */
55 l->l_md.md_astpending = 0;
56
57 if (l->l_pflag & LP_OWEUPC) {
58 l->l_pflag &= ~LP_OWEUPC;
59 ADDUPROF(l);
60 }
61
62 /* Invoke MI userret code */
63 mi_userret(l);
64
65 #ifdef PTRACE_HOOKS
66 /* Check if lwp is being PT_STEP'ed */
67 if (l->l_md.md_flags & MDL_SSTEP) {
68 struct trapframe *tf = l->l_md.md_regs;
69
70 /*
71 * Channel A is set up for single stepping in sh_cpu_init().
72 * Before RTE we write tf_ubc to BBRA and tf_spc to BARA.
73 */
74 #ifdef SH3
75 if (CPU_IS_SH3) {
76 tf->tf_ubc = UBC_CYCLE_INSN | UBC_CYCLE_READ
77 | SH3_UBC_CYCLE_CPU;
78 }
79 #endif
80 #ifdef SH4
81 if (CPU_IS_SH4) {
82 tf->tf_ubc = UBC_CYCLE_INSN | UBC_CYCLE_READ;
83 }
84 #endif
85 }
86 #endif /* PTRACE_HOOKS */
87 }
88
89 #endif /* !_SH3_USERRET_H_ */
90