sig_machdep.c revision 1.20
1 /* $NetBSD: sig_machdep.c,v 1.20 2008/04/24 18:39:20 ad 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1982, 1986, 1990, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * the Systems Programming Group of the University of Utah Computer 45 * Science Department. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * from: Utah Hdr: machdep.c 1.74 92/12/20 72 * from: @(#)machdep.c 8.10 (Berkeley) 4/20/94 73 */ 74 /* 75 * Copyright (c) 1988 University of Utah. 76 * 77 * This code is derived from software contributed to Berkeley by 78 * the Systems Programming Group of the University of Utah Computer 79 * Science Department. 80 * 81 * Redistribution and use in source and binary forms, with or without 82 * modification, are permitted provided that the following conditions 83 * are met: 84 * 1. Redistributions of source code must retain the above copyright 85 * notice, this list of conditions and the following disclaimer. 86 * 2. Redistributions in binary form must reproduce the above copyright 87 * notice, this list of conditions and the following disclaimer in the 88 * documentation and/or other materials provided with the distribution. 89 * 3. All advertising materials mentioning features or use of this software 90 * must display the following acknowledgement: 91 * This product includes software developed by the University of 92 * California, Berkeley and its contributors. 93 * 4. Neither the name of the University nor the names of its contributors 94 * may be used to endorse or promote products derived from this software 95 * without specific prior written permission. 96 * 97 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 98 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 99 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 100 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 101 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 102 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 103 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 104 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 105 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 106 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 107 * SUCH DAMAGE. 108 * 109 * from: Utah Hdr: machdep.c 1.74 92/12/20 110 * from: @(#)machdep.c 8.10 (Berkeley) 4/20/94 111 */ 112 113 #include <sys/cdefs.h> 114 __KERNEL_RCSID(0, "$NetBSD: sig_machdep.c,v 1.20 2008/04/24 18:39:20 ad Exp $"); 115 116 #include "opt_compat_netbsd.h" 117 118 #include <sys/param.h> 119 #include <sys/systm.h> 120 #include <sys/kernel.h> 121 #include <sys/proc.h> 122 #include <sys/user.h> 123 #include <sys/signal.h> 124 #include <sys/signalvar.h> 125 126 #include <sys/mount.h> 127 #include <sys/syscallargs.h> 128 129 #include <machine/cpu.h> 130 #include <machine/reg.h> 131 #include <machine/frame.h> 132 133 #ifdef DEBUG 134 int sigdebug = 0; 135 int sigpid = 0; 136 #define SDB_FOLLOW 0x01 137 #define SDB_KSTACK 0x02 138 #define SDB_FPSTATE 0x04 139 #endif 140 141 static void *getframe(struct lwp *, int, int *); 142 static void * 143 getframe(struct lwp *l, int sig, int *onstack) 144 { 145 struct proc *p = l->l_proc; 146 struct trapframe *tf = l->l_md.md_regs; 147 148 /* Do we need to jump onto the signal stack? */ 149 *onstack = (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 150 && (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; 151 if (*onstack) 152 return (void *)HPPA_FRAME_ROUND(l->l_sigstk.ss_sp); 153 else 154 return (void *)HPPA_FRAME_ROUND(tf->tf_sp); 155 } 156 157 struct sigframe_siginfo { 158 siginfo_t sf_si; 159 ucontext_t sf_uc; 160 }; 161 162 void 163 sendsig(const struct ksiginfo *ksi, const sigset_t *mask) 164 { 165 struct lwp *l = curlwp; 166 struct proc *p = l->l_proc; 167 struct sigacts *ps = p->p_sigacts; 168 struct sigframe_siginfo *fp, frame; 169 struct trapframe *tf; 170 int sig = ksi->ksi_signo; 171 sig_t catcher = SIGACTION(p, sig).sa_handler; 172 int onstack, error; 173 174 fp = getframe(l, sig, &onstack); 175 tf = (struct trapframe *)l->l_md.md_regs; 176 177 /* Build stack frame for signal trampoline. */ 178 switch (ps->sa_sigdesc[sig].sd_vers) { 179 default: 180 printf("sendsig_siginfo: bad version %d\n", 181 ps->sa_sigdesc[sig].sd_vers); 182 sigexit(l, SIGILL); 183 case 2: 184 break; 185 } 186 187 frame.sf_si._info = ksi->ksi_info; 188 frame.sf_uc.uc_flags = _UC_SIGMASK | 189 ((l->l_sigstk.ss_flags & SS_ONSTACK) ? 190 _UC_SETSTACK : _UC_CLRSTACK); 191 frame.sf_uc.uc_sigmask = *mask; 192 frame.sf_uc.uc_link = l->l_ctxlink; 193 memset(&frame.sf_uc.uc_stack, 0, sizeof(frame.sf_uc.uc_stack)); 194 sendsig_reset(l, sig); 195 mutex_exit(p->p_lock); 196 cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); 197 error = copyout(&frame, fp, sizeof(frame)); 198 mutex_enter(p->p_lock); 199 200 if (error != 0) { 201 202 /* 203 * Process has trashed its stack; give it an illegal 204 * instruction to halt it in its tracks. 205 */ 206 sigexit(l, SIGILL); 207 /* NOTREACHED */ 208 } 209 210 /* 211 * Set up the registers to invoke the signal trampoline. 212 */ 213 tf->tf_arg0 = sig; 214 tf->tf_arg1 = (__greg_t)&fp->sf_si; 215 tf->tf_arg2 = (__greg_t)&fp->sf_uc; 216 tf->tf_r3 = (__greg_t)&fp->sf_uc; 217 218 fp++; 219 tf->tf_iisq_head = tf->tf_iisq_tail = l->l_addr->u_pcb.pcb_space; 220 tf->tf_iioq_head = 221 (__greg_t)ps->sa_sigdesc[sig].sd_tramp | HPPA_PC_PRIV_USER; 222 tf->tf_iioq_tail = tf->tf_iioq_head + 4; 223 tf->tf_arg3 = (__greg_t)catcher; 224 tf->tf_sp = HPPA_FRAME_ROUND(fp); 225 226 /* Remember that we're now on the signal stack. */ 227 if (onstack) 228 l->l_sigstk.ss_flags |= SS_ONSTACK; 229 } 230
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