1 /* $NetBSD: compat_13_machdep.c,v 1.6 2018/12/29 11:30:12 maxv Exp $ */
2
3 /*
4 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * Changed for the VAX port (and for readability) /IC
8 *
9 * This code is derived from software contributed to Berkeley by the Systems
10 * Programming Group of the University of Utah Computer Science Department.
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: machdep.c 1.63 91/04/24
37 *
38 * @(#)machdep.c 7.16 (Berkeley) 6/3/91
39 */
40
41 /*
42 * Copyright (c) 2002, Hugh Graham.
43 * Copyright (c) 1994, 1998 Ludd, University of Lule}, Sweden.
44 * Copyright (c) 1993 Adam Glass
45 * Copyright (c) 1988 University of Utah.
46 *
47 * Changed for the VAX port (and for readability) /IC
48 *
49 * This code is derived from software contributed to Berkeley by the Systems
50 * Programming Group of the University of Utah Computer Science Department.
51 *
52 * Redistribution and use in source and binary forms, with or without
53 * modification, are permitted provided that the following conditions
54 * are met:
55 * 1. Redistributions of source code must retain the above copyright
56 * notice, this list of conditions and the following disclaimer.
57 * 2. Redistributions in binary form must reproduce the above copyright
58 * notice, this list of conditions and the following disclaimer in the
59 * documentation and/or other materials provided with the distribution.
60 * 3. All advertising materials mentioning features or use of this software
61 * must display the following acknowledgement:
62 * This product includes software developed by the University of
63 * California, Berkeley and its contributors.
64 * 4. Neither the name of the University nor the names of its contributors
65 * may be used to endorse or promote products derived from this software
66 * without specific prior written permission.
67 *
68 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
69 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
70 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
71 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
72 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
73 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
74 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
75 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
76 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
77 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
78 * SUCH DAMAGE.
79 *
80 * from: Utah Hdr: machdep.c 1.63 91/04/24
81 *
82 * @(#)machdep.c 7.16 (Berkeley) 6/3/91
83 */
84
85 #include <sys/cdefs.h>
86 __KERNEL_RCSID(0, "$NetBSD: compat_13_machdep.c,v 1.6 2018/12/29 11:30:12 maxv Exp $");
87
88 #ifdef _KERNEL_OPT
89 #include "opt_compat_netbsd.h"
90 #include "opt_compat_ultrix.h"
91 #include "opt_multiprocessor.h"
92 #include "opt_lockdebug.h"
93 #endif
94
95 #include <sys/param.h>
96 #include <sys/systm.h>
97 #include <sys/cpu.h>
98 #include <sys/device.h>
99 #include <sys/extent.h>
100 #include <sys/proc.h>
101 #include <sys/signal.h>
102 #include <sys/syscallargs.h>
103 #include <sys/sysctl.h>
104 #include <sys/time.h>
105
106 #include <dev/cons.h>
107
108 #include <compat/sys/signal.h>
109 #include <compat/sys/signalvar.h>
110
111 #include <machine/macros.h>
112 #include <machine/reg.h>
113 #include <vax/vax/gencons.h>
114
115 /*
116 * This code was moved here from sys/arch/vax/vax/sig_machdep.c
117 */
118
119 int
compat_13_sys_sigreturn(struct lwp * l,const struct compat_13_sys_sigreturn_args * uap,register_t * retval)120 compat_13_sys_sigreturn(struct lwp *l, const struct compat_13_sys_sigreturn_args *uap, register_t *retval)
121 {
122 /* {
123 syscallarg(struct sigcontext13 *) sigcntxp;
124 } */
125 struct proc * const p = l->l_proc;
126 struct trapframe * const tf = l->l_md.md_utf;
127 struct sigcontext13 *ucntx;
128 struct sigcontext13 ksc;
129 sigset_t mask;
130
131 ucntx = SCARG(uap, sigcntxp);
132 if (copyin((void *)ucntx, (void *)&ksc, sizeof(struct sigcontext)))
133 return EINVAL;
134
135 /* Compatibility mode? */
136 if ((ksc.sc_ps & (PSL_IPL | PSL_IS)) ||
137 ((ksc.sc_ps & (PSL_U | PSL_PREVU)) != (PSL_U | PSL_PREVU)) ||
138 (ksc.sc_ps & PSL_CM)) {
139 return (EINVAL);
140 }
141
142 mutex_enter(p->p_lock);
143 if (ksc.sc_onstack & SS_ONSTACK)
144 l->l_sigstk.ss_flags |= SS_ONSTACK;
145 else
146 l->l_sigstk.ss_flags &= ~SS_ONSTACK;
147
148 native_sigset13_to_sigset(&ksc.sc_mask, &mask);
149 (void) sigprocmask1(l, SIG_SETMASK, &mask, 0);
150 mutex_exit(p->p_lock);
151
152 tf->tf_fp = ksc.sc_fp;
153 tf->tf_ap = ksc.sc_ap;
154 tf->tf_pc = ksc.sc_pc;
155 tf->tf_sp = ksc.sc_sp;
156 tf->tf_psl = ksc.sc_ps;
157 return (EJUSTRETURN);
158 }
159
160 vaddr_t
setupstack_oldsigcontext(const struct ksiginfo * ksi,const sigset_t * mask,int vers,struct lwp * l,struct trapframe * tf,vaddr_t sp,int onstack,vaddr_t handler)161 setupstack_oldsigcontext(const struct ksiginfo *ksi, const sigset_t *mask,
162 int vers, struct lwp *l, struct trapframe *tf, vaddr_t sp, int onstack,
163 vaddr_t handler)
164 {
165 struct sigcontext sigctx;
166 struct otrampframe tramp;
167 struct proc * const p = l->l_proc;
168 bool error;
169
170 sigctx.sc_pc = tf->tf_pc;
171 sigctx.sc_ps = tf->tf_psl;
172 sigctx.sc_ap = tf->tf_ap;
173 sigctx.sc_fp = tf->tf_fp;
174 sigctx.sc_sp = tf->tf_sp;
175 sigctx.sc_onstack = onstack ? SS_ONSTACK : 0;
176 sigctx.sc_mask = *mask;
177 sp -= sizeof(struct sigcontext);
178
179 native_sigset_to_sigset13(mask, &sigctx.__sc_mask13);
180
181 tramp.sig = ksi->ksi_signo;
182 tramp.code = (register_t)ksi->ksi_addr;
183 /* Set up positions for structs on stack */
184 tramp.scp = sp;
185 /* r0..r5 are saved by the popr in the sigcode snippet but we need
186 to zero them anyway. */
187 tramp.r0 = tramp.r1 = tramp.r2 = tramp.r3 = tramp.r4 = tramp.r5 = 0;
188 tramp.pc = (register_t)handler;
189 tramp.arg = sp;
190 sendsig_reset(l, ksi->ksi_signo);
191 mutex_exit(p->p_lock);
192
193 /* Point stack pointer at pc in trampoline. */
194 sp =- 8;
195
196 error = copyout(&tramp, (char *)tramp.scp - sizeof(tramp), sizeof(tramp)) != 0 ||
197 copyout(&sigctx, (void *)tramp.scp, sizeof(sigctx)) != 0;
198
199 mutex_enter(p->p_lock);
200 if (error)
201 return 0;
202
203 return sp;
204 }
205