remove sunos_machdep.c
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christos
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/* $NetBSD: sunos_machdep.c,v 1.1 1995/04/22 20:24:58 christos Exp $ */
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: machdep.c 1.63 91/04/24$
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*
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* @(#)machdep.c 7.16 (Berkeley) 6/3/91
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/filedesc.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include <sys/kernel.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <sys/malloc.h>
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#include <sys/syscallargs.h>
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#include <compat/sunos/sunos_syscallargs.h>
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/* sigh.. I guess it's too late to change now, but "our" sigcontext
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is plain vax, not very 68000 (ap, for example..) */
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struct sunos_sigcontext {
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int sc_onstack; /* sigstack state to restore */
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int sc_mask; /* signal mask to restore */
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int sc_sp; /* sp to restore */
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int sc_pc; /* pc to restore */
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int sc_ps; /* psl to restore */
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};
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struct sunos_sigframe {
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int ssf_signum; /* signo for handler */
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int ssf_code; /* additional info for handler */
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struct sunos_sigcontext *ssf_scp; /* context pointer for handler */
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u_int ssf_addr; /* even more info for handler */
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struct sunos_sigcontext ssf_sc; /* I don't know if that's what
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comes here */
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};
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/*
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* much simpler sendsig() for SunOS processes, as SunOS does the whole
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* context-saving in usermode. For now, no hardware information (ie.
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* frames for buserror etc) is saved. This could be fatal, so I take
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* SIG_DFL for "dangerous" signals.
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*/
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void
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sunos_sendsig(catcher, sig, mask, code)
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sig_t catcher;
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int sig, mask;
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unsigned code;
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{
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register struct proc *p = curproc;
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register struct sunos_sigframe *fp;
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struct sunos_sigframe kfp;
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register struct frame *frame;
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register struct sigacts *psp = p->p_sigacts;
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register short ft;
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int oonstack, fsize;
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frame = (struct frame *)p->p_md.md_regs;
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ft = frame->f_format;
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oonstack = psp->ps_sigstk.ss_flags & SA_ONSTACK;
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/*
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* Allocate and validate space for the signal handler
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* context. Note that if the stack is in P0 space, the
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* call to grow() is a nop, and the useracc() check
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* will fail if the process has not already allocated
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* the space with a `brk'.
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*/
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fsize = sizeof(struct sunos_sigframe);
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if ((psp->ps_flags & SAS_ALTSTACK) && oonstack == 0 &&
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(psp->ps_sigonstack & sigmask(sig))) {
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fp = (struct sunos_sigframe *)(psp->ps_sigstk.ss_base +
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psp->ps_sigstk.ss_size - sizeof(struct sunos_sigframe));
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psp->ps_sigstk.ss_flags |= SA_ONSTACK;
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} else
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fp = (struct sunos_sigframe *)frame->f_regs[SP] - 1;
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if ((unsigned)fp <= USRSTACK - ctob(p->p_vmspace->vm_ssize))
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(void)grow(p, (unsigned)fp);
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#ifdef DEBUG
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if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
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printf("sunos_sendsig(%d): sig %d ssp %x usp %x scp %x ft %d\n",
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p->p_pid, sig, &oonstack, fp, &fp->ssf_sc, ft);
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#endif
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if (useracc((caddr_t)fp, fsize, B_WRITE) == 0) {
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#ifdef DEBUG
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if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
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printf("sunos_sendsig(%d): useracc failed on sig %d\n",
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p->p_pid, sig);
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#endif
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/*
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* Process has trashed its stack; give it an illegal
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* instruction to halt it in its tracks.
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*/
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SIGACTION(p, SIGILL) = SIG_DFL;
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sig = sigmask(SIGILL);
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p->p_sigignore &= ~sig;
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p->p_sigcatch &= ~sig;
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p->p_sigmask &= ~sig;
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psignal(p, SIGILL);
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return;
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}
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/*
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* Build the argument list for the signal handler.
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*/
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kfp.ssf_signum = sig;
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kfp.ssf_code = code;
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kfp.ssf_scp = &fp->ssf_sc;
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kfp.ssf_addr = ~0; /* means: not computable */
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/*
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* Build the signal context to be used by sigreturn.
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*/
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kfp.ssf_sc.sc_onstack = oonstack;
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kfp.ssf_sc.sc_mask = mask;
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kfp.ssf_sc.sc_sp = frame->f_regs[SP];
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kfp.ssf_sc.sc_pc = frame->f_pc;
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kfp.ssf_sc.sc_ps = frame->f_sr;
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(void) copyout(&kfp, fp, fsize);
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frame->f_regs[SP] = (int)fp;
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#ifdef DEBUG
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if (sigdebug & SDB_FOLLOW)
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printf("sunos_sendsig(%d): sig %d scp %x sc_sp %x\n",
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p->p_pid, sig, kfp.ssf_sc.sc_sp);
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#endif
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/* have the user-level trampoline code sort out what registers it
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has to preserve. */
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frame->f_pc = (u_int) catcher;
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#ifdef DEBUG
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if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
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printf("sunos_sendsig(%d): sig %d returns\n",
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p->p_pid, sig);
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#endif
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}
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int
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sunos_sigreturn(p, uap, retval)
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struct proc *p;
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struct sunos_sigreturn_args *uap;
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register_t *retval;
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{
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register struct sunos_sigcontext *scp;
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register struct frame *frame;
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register int rf;
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struct sunos_sigcontext tsigc;
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int flags;
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scp = uap->sigcntxp;
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#ifdef DEBUG
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if (sigdebug & SDB_FOLLOW)
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printf("sunos_sigreturn: pid %d, scp %x\n", p->p_pid, scp);
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#endif
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if ((int)scp & 1)
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return (EINVAL);
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/*
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* Test and fetch the context structure.
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* We grab it all at once for speed.
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*/
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if (useracc((caddr_t)scp, sizeof (*scp), B_WRITE) == 0 ||
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copyin((caddr_t)scp, (caddr_t)&tsigc, sizeof tsigc))
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return (EINVAL);
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scp = &tsigc;
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if ((scp->sc_ps & (PSL_MBZ|PSL_IPL|PSL_S)) != 0)
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return (EINVAL);
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/*
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* Restore the user supplied information
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*/
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if (scp->sc_onstack & 1)
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p->p_sigacts->ps_sigstk.ss_flags |= SA_ONSTACK;
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else
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p->p_sigacts->ps_sigstk.ss_flags &= ~SA_ONSTACK;
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p->p_sigmask = scp->sc_mask &~ sigcantmask;
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frame = (struct frame *) p->p_md.md_regs;
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frame->f_regs[SP] = scp->sc_sp;
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frame->f_pc = scp->sc_pc;
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frame->f_sr = scp->sc_ps;
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return EJUSTRETURN;
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}
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