/* $NetBSD: sig_machdep.c,v 1.28 2021/10/27 04:14:59 thorpej Exp $ */ /*- * Copyright (c) 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matthew Fredette. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1986, 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: Utah Hdr: machdep.c 1.74 92/12/20 * from: @(#)machdep.c 8.10 (Berkeley) 4/20/94 */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: sig_machdep.c,v 1.28 2021/10/27 04:14:59 thorpej Exp $"); #include "opt_compat_netbsd.h" #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/proc.h> #include <sys/signal.h> #include <sys/signalvar.h> #include <sys/mount.h> #include <sys/syscallargs.h> #include <machine/cpu.h> #include <machine/pcb.h> #include <machine/reg.h> #include <machine/frame.h> #ifdef DEBUG int sigdebug = 0; int sigpid = 0; #define SDB_FOLLOW 0x01 #define SDB_KSTACK 0x02 #define SDB_FPSTATE 0x04 #endif static void *getframe(struct lwp *, int, int *); static void * getframe(struct lwp *l, int sig, int *onstack) { struct proc *p = l->l_proc; struct trapframe *tf = l->l_md.md_regs; /* Do we need to jump onto the signal stack? */ *onstack = (l->l_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; if (*onstack) return (void *)HPPA_FRAME_ROUND(l->l_sigstk.ss_sp); else return (void *)HPPA_FRAME_ROUND(tf->tf_sp); } struct sigframe_siginfo { siginfo_t sf_si; ucontext_t sf_uc; }; void sendsig_siginfo(const struct ksiginfo *ksi, const sigset_t *mask) { struct lwp *l = curlwp; struct proc *p = l->l_proc; struct pcb *pcb = lwp_getpcb(l); struct sigacts *ps = p->p_sigacts; struct sigframe_siginfo *fp, frame; struct trapframe *tf; int sig = ksi->ksi_signo; sig_t catcher = SIGACTION(p, sig).sa_handler; int onstack, error; fp = getframe(l, sig, &onstack); tf = (struct trapframe *)l->l_md.md_regs; /* Build stack frame for signal trampoline. */ switch (ps->sa_sigdesc[sig].sd_vers) { default: printf("sendsig_siginfo: bad version %d\n", ps->sa_sigdesc[sig].sd_vers); sigexit(l, SIGILL); case __SIGTRAMP_SIGINFO_VERSION: break; } memset(&frame, 0, sizeof(frame)); frame.sf_si._info = ksi->ksi_info; frame.sf_uc.uc_flags = _UC_SIGMASK | ((l->l_sigstk.ss_flags & SS_ONSTACK) ? _UC_SETSTACK : _UC_CLRSTACK); frame.sf_uc.uc_sigmask = *mask; frame.sf_uc.uc_link = l->l_ctxlink; sendsig_reset(l, sig); mutex_exit(p->p_lock); cpu_getmcontext(l, &frame.sf_uc.uc_mcontext, &frame.sf_uc.uc_flags); error = copyout(&frame, fp, sizeof(frame)); mutex_enter(p->p_lock); if (error != 0) { /* * Process has trashed its stack; give it an illegal * instruction to halt it in its tracks. */ sigexit(l, SIGILL); /* NOTREACHED */ } /* * Set up the registers to invoke the signal trampoline. */ tf->tf_arg0 = sig; tf->tf_arg1 = (__greg_t)&fp->sf_si; tf->tf_arg2 = (__greg_t)&fp->sf_uc; tf->tf_r3 = (__greg_t)&fp->sf_uc; fp++; tf->tf_iisq_head = tf->tf_iisq_tail = pcb->pcb_space; tf->tf_iioq_head = (__greg_t)ps->sa_sigdesc[sig].sd_tramp | HPPA_PC_PRIV_USER; tf->tf_iioq_tail = tf->tf_iioq_head + 4; tf->tf_arg3 = (__greg_t)catcher; tf->tf_sp = HPPA_FRAME_ROUND(fp); /* Remember that we're now on the signal stack. */ if (onstack) l->l_sigstk.ss_flags |= SS_ONSTACK; }
