1 /* $NetBSD: compat_13_machdep.c,v 1.23 2024/06/19 15:19:22 rin Exp $ */
2
3 /*
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: compat_13_machdep.c,v 1.23 2024/06/19 15:19:22 rin Exp $");
36
37 #ifdef _KERNEL_OPT
38 #include "opt_ppcarch.h"
39 #endif
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/signalvar.h>
44 #include <sys/kernel.h>
45 #include <sys/proc.h>
46 #include <sys/mount.h>
47 #include <sys/syscallargs.h>
48
49 #include <uvm/uvm_extern.h>
50
51 #include <compat/sys/signal.h>
52 #include <compat/sys/signalvar.h>
53
54 #include <powerpc/psl.h>
55
56 #ifdef _LP64
57
58 /*
59 * COMPAT_13 is useful only with COMPAT_NETBSD32.
60 */
61
62 int
compat_13_sys_sigreturn(struct lwp * l,const struct compat_13_sys_sigreturn_args * uap,register_t * retval)63 compat_13_sys_sigreturn(struct lwp *l,
64 const struct compat_13_sys_sigreturn_args *uap, register_t *retval)
65 {
66
67 return ENOSYS;
68 }
69
70 #else
71
72 int
compat_13_sys_sigreturn(struct lwp * l,const struct compat_13_sys_sigreturn_args * uap,register_t * retval)73 compat_13_sys_sigreturn(struct lwp *l,
74 const struct compat_13_sys_sigreturn_args *uap, register_t *retval)
75 {
76 /* {
77 syscallarg(struct sigcontext13 *) sigcntxp;
78 } */
79 struct proc * const p = l->l_proc;
80 struct trapframe * const tf = l->l_md.md_utf;
81 struct sigcontext13 sc;
82 int error;
83 sigset_t mask;
84
85 /*
86 * The trampoline hands us the context.
87 * It is unsafe to keep track of it ourselves, in the event that a
88 * program jumps out of a signal handler.
89 */
90 if ((error = copyin(SCARG(uap, sigcntxp), &sc, sizeof sc)) != 0)
91 return (error);
92
93 if (!PSL_USEROK_P(sc.sc_frame.srr1))
94 return (EINVAL);
95
96 /* Restore register context. */
97 memcpy(tf->tf_fixreg, sc.sc_frame.fixreg, sizeof(tf->tf_fixreg));
98 tf->tf_lr = sc.sc_frame.lr;
99 tf->tf_cr = sc.sc_frame.cr;
100 tf->tf_xer = sc.sc_frame.xer;
101 tf->tf_ctr = sc.sc_frame.ctr;
102 tf->tf_srr0 = sc.sc_frame.srr0;
103 tf->tf_srr1 = sc.sc_frame.srr1;
104 #ifdef PPC_OEA
105 tf->tf_vrsave = sc.sc_frame.vrsave;
106 tf->tf_mq = sc.sc_frame.mq;
107 #endif
108
109 mutex_enter(p->p_lock);
110 /* Restore signal stack. */
111 if (sc.sc_onstack & SS_ONSTACK)
112 l->l_sigstk.ss_flags |= SS_ONSTACK;
113 else
114 l->l_sigstk.ss_flags &= ~SS_ONSTACK;
115
116 /* Restore signal mask. */
117 native_sigset13_to_sigset(&sc.sc_mask, &mask);
118 (void) sigprocmask1(l, SIG_SETMASK, &mask, 0);
119 mutex_exit(p->p_lock);
120
121 return (EJUSTRETURN);
122 }
123
124 #endif /* !_LP64 */
125