1 /* $NetBSD: sig_machdep.c,v 1.24 2011/01/14 02:06:26 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matthew Fredette. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1990, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * the Systems Programming Group of the University of Utah Computer 38 * Science Department. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * from: Utah Hdr: machdep.c 1.74 92/12/20 65 * from: @(#)machdep.c 8.10 (Berkeley) 4/20/94 66 */ 67 /* 68 * Copyright (c) 1988 University of Utah. 69 * 70 * This code is derived from software contributed to Berkeley by 71 * the Systems Programming Group of the University of Utah Computer 72 * Science Department. 73 * 74 * Redistribution and use in source and binary forms, with or without 75 * modification, are permitted provided that the following conditions 76 * are met: 77 * 1. Redistributions of source code must retain the above copyright 78 * notice, this list of conditions and the following disclaimer. 79 * 2. Redistributions in binary form must reproduce the above copyright 80 * notice, this list of conditions and the following disclaimer in the 81 * documentation and/or other materials provided with the distribution. 82 * 3. All advertising materials mentioning features or use of this software 83 * must display the following acknowledgement: 84 * This product includes software developed by the University of 85 * California, Berkeley and its contributors. 86 * 4. Neither the name of the University nor the names of its contributors 87 * may be used to endorse or promote products derived from this software 88 * without specific prior written permission. 89 * 90 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 91 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 92 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 93 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 94 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 95 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 96 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 97 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 98 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 99 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 100 * SUCH DAMAGE. 101 * 102 * from: Utah Hdr: machdep.c 1.74 92/12/20 103 * from: @(#)machdep.c 8.10 (Berkeley) 4/20/94 104 */ 105 106 #include <sys/cdefs.h> 107 __KERNEL_RCSID(0, "$NetBSD: sig_machdep.c,v 1.24 2011/01/14 02:06:26 rmind Exp $"); 108 109 #include "opt_compat_netbsd.h" 110 111 #include <sys/param.h> 112 #include <sys/systm.h> 113 #include <sys/kernel.h> 114 #include <sys/proc.h> 115 #include <sys/signal.h> 116 #include <sys/signalvar.h> 117 118 #include <sys/mount.h> 119 #include <sys/syscallargs.h> 120 121 #include <machine/cpu.h> 122 #include <machine/pcb.h> 123 #include <machine/reg.h> 124 #include <machine/frame.h> 125 126 #ifdef DEBUG 127 int sigdebug = 0; 128 int sigpid = 0; 129 #define SDB_FOLLOW 0x01 130 #define SDB_KSTACK 0x02 131 #define SDB_FPSTATE 0x04 132 #endif 133 134 static void *getframe(struct lwp *, int, int *); 135 static void * 136 getframe(struct lwp *l, int sig, int *onstack) 137 { 138 struct proc *p = l->l_proc; 139 struct trapframe *tf = l->l_md.md_regs; 140 141 /* Do we need to jump onto the signal stack? */ 142 *onstack = (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 143 && (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; 144 if (*onstack) 145 return (void *)HPPA_FRAME_ROUND(l->l_sigstk.ss_sp); 146 else 147 return (void *)HPPA_FRAME_ROUND(tf->tf_sp); 148 } 149 150 struct sigframe_siginfo { 151 siginfo_t sf_si; 152 ucontext_t sf_uc; 153 }; 154 155 void 156 sendsig_siginfo(const struct ksiginfo *ksi, const sigset_t *mask) 157 { 158 struct lwp *l = curlwp; 159 struct proc *p = l->l_proc; 160 struct pcb *pcb = lwp_getpcb(l); 161 struct sigacts *ps = p->p_sigacts; 162 struct sigframe_siginfo *fp, frame; 163 struct trapframe *tf; 164 int sig = ksi->ksi_signo; 165 sig_t catcher = SIGACTION(p, sig).sa_handler; 166 int onstack, error; 167 168 fp = getframe(l, sig, &onstack); 169 tf = (struct trapframe *)l->l_md.md_regs; 170 171 /* Build stack frame for signal trampoline. */ 172 switch (ps->sa_sigdesc[sig].sd_vers) { 173 default: 174 printf("sendsig_siginfo: bad version %d\n", 175 ps->sa_sigdesc[sig].sd_vers); 176 sigexit(l, SIGILL); 177 case 2: 178 break; 179 } 180 181 frame.sf_si._info = ksi->ksi_info; 182 frame.sf_uc.uc_flags = _UC_SIGMASK | 183 ((l->l_sigstk.ss_flags & SS_ONSTACK) ? 184 _UC_SETSTACK : _UC_CLRSTACK); 185 frame.sf_uc.uc_sigmask = *mask; 186 frame.sf_uc.uc_link = l->l_ctxlink; 187 memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); 188 sendsig_reset(l, sig); 189 mutex_exit(p->p_lock); 190 cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); 191 error = copyout(&frame, fp, sizeof(frame)); 192 mutex_enter(p->p_lock); 193 194 if (error != 0) { 195 196 /* 197 * Process has trashed its stack; give it an illegal 198 * instruction to halt it in its tracks. 199 */ 200 sigexit(l, SIGILL); 201 /* NOTREACHED */ 202 } 203 204 /* 205 * Set up the registers to invoke the signal trampoline. 206 */ 207 tf->tf_arg0 = sig; 208 tf->tf_arg1 = (__greg_t)&fp->sf_si; 209 tf->tf_arg2 = (__greg_t)&fp->sf_uc; 210 tf->tf_r3 = (__greg_t)&fp->sf_uc; 211 212 fp++; 213 tf->tf_iisq_head = tf->tf_iisq_tail = pcb->pcb_space; 214 tf->tf_iioq_head = 215 (__greg_t)ps->sa_sigdesc[sig].sd_tramp | HPPA_PC_PRIV_USER; 216 tf->tf_iioq_tail = tf->tf_iioq_head + 4; 217 tf->tf_arg3 = (__greg_t)catcher; 218 tf->tf_sp = HPPA_FRAME_ROUND(fp); 219 220 /* Remember that we're now on the signal stack. */ 221 if (onstack) 222 l->l_sigstk.ss_flags |= SS_ONSTACK; 223 } 224