1 /* $NetBSD: compat_16_machdep.c,v 1.5 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_16_machdep.c,v 1.5 2018/12/29 11:30:12 maxv Exp $"); 87 88 #ifdef _KERNEL_OPT 89 #include "opt_ddb.h" 90 #include "opt_compat_netbsd.h" 91 #include "opt_compat_ultrix.h" 92 #include "opt_multiprocessor.h" 93 #include "opt_lockdebug.h" 94 #endif 95 96 #include <sys/param.h> 97 #include <sys/systm.h> 98 #include <sys/cpu.h> 99 #include <sys/device.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 <machine/macros.h> 109 #include <machine/reg.h> 110 #include <vax/vax/gencons.h> 111 112 /* 113 * This code was moved here from sys/arch/vax/vax/sig_machdep.c 114 */ 115 116 int 117 compat_16_sys___sigreturn14(struct lwp *l, const struct compat_16_sys___sigreturn14_args *uap, register_t *retval) 118 { 119 /* { 120 syscallarg(struct sigcontext *) sigcntxp; 121 } */ 122 struct proc * const p = l->l_proc; 123 struct trapframe * const tf = l->l_md.md_utf; 124 struct sigcontext * const ucntx = SCARG(uap, sigcntxp); 125 struct sigcontext ksc; 126 127 128 if (copyin((void *)ucntx, (void *)&ksc, sizeof(struct sigcontext))) 129 return EINVAL; 130 /* Compatibility mode? */ 131 if ((ksc.sc_ps & (PSL_IPL | PSL_IS)) || 132 ((ksc.sc_ps & (PSL_U | PSL_PREVU)) != (PSL_U | PSL_PREVU)) || 133 (ksc.sc_ps & PSL_CM)) { 134 return (EINVAL); 135 } 136 137 mutex_enter(p->p_lock); 138 if (ksc.sc_onstack & SS_ONSTACK) 139 l->l_sigstk.ss_flags |= SS_ONSTACK; 140 else 141 l->l_sigstk.ss_flags &= ~SS_ONSTACK; 142 143 /* Restore signal mask. */ 144 (void) sigprocmask1(l, SIG_SETMASK, &ksc.sc_mask, 0); 145 mutex_exit(p->p_lock); 146 147 tf->tf_fp = ksc.sc_fp; 148 tf->tf_ap = ksc.sc_ap; 149 tf->tf_pc = ksc.sc_pc; 150 tf->tf_sp = ksc.sc_sp; 151 tf->tf_psl = ksc.sc_ps; 152 return (EJUSTRETURN); 153 } 154 155 /* 156 * Brief description of how sendsig() works: 157 * A struct sigcontext is allocated on the user stack. The relevant 158 * registers are saved in it. Below it is a struct trampframe constructed, it 159 * is actually an argument list for callg. The user 160 * stack pointer is put below all structs. 161 * 162 * The registers will contain when the signal handler is called: 163 * pc, psl - Obvious 164 * sp - An address below all structs 165 * fp - The address of the signal handler 166 * ap - The address to the callg frame 167 * 168 * The trampoline code will save r0-r5 before doing anything else. 169 */ 170 vaddr_t 171 setupstack_sigcontext2(const struct ksiginfo *ksi, const sigset_t *mask, 172 int vers, struct lwp *l, struct trapframe *tf, vaddr_t sp, int onstack, 173 vaddr_t handler) 174 { 175 struct trampoline2 tramp; 176 struct sigcontext sigctx; 177 struct proc * const p = l->l_proc; 178 bool error; 179 180 /* The sigcontext struct will be passed back to sigreturn(). */ 181 sigctx.sc_pc = tf->tf_pc; 182 sigctx.sc_ps = tf->tf_psl; 183 sigctx.sc_ap = tf->tf_ap; 184 sigctx.sc_fp = tf->tf_fp; 185 sigctx.sc_sp = tf->tf_sp; 186 sigctx.sc_onstack = onstack ? SS_ONSTACK : 0; 187 sigctx.sc_mask = *mask; 188 sp -= sizeof(struct sigcontext); 189 190 /* Arguments given to the signal handler. */ 191 tramp.narg = 3; 192 tramp.sig = ksi->ksi_signo; 193 tramp.code = (register_t)ksi->ksi_addr; 194 tramp.scp = sp; 195 sp -= sizeof(tramp); 196 sendsig_reset(l, ksi->ksi_signo); 197 mutex_exit(p->p_lock); 198 199 /* Store the handler in the trapframe. */ 200 tf->tf_fp = handler; 201 202 /* Copy out the sigcontext and trampoline. */ 203 error = (copyout(&sigctx, (char *)tramp.scp, sizeof(sigctx)) != 0 || 204 copyout(&tramp, (char *)sp, sizeof(tramp)) != 0); 205 206 mutex_enter(p->p_lock); 207 if (error) 208 return 0; 209 210 /* return updated stack pointer */ 211 return sp; 212 } 213
Indexes created Sun Sep 21 15:09:59 GMT 2025