diff options
| -rw-r--r-- | sys/arch/sun3/sun3/machdep.c | 293 |
1 files changed, 1 insertions, 292 deletions
diff --git a/sys/arch/sun3/sun3/machdep.c b/sys/arch/sun3/sun3/machdep.c index a01036238f8..6e3e1732a69 100644 --- a/sys/arch/sun3/sun3/machdep.c +++ b/sys/arch/sun3/sun3/machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: machdep.c,v 1.19 1997/04/05 20:44:25 kstailey Exp $ */ +/* $OpenBSD: machdep.c,v 1.20 1997/04/05 20:48:58 kstailey Exp $ */ /* $NetBSD: machdep.c,v 1.77 1996/10/13 03:47:51 christos Exp $ */ /* @@ -508,297 +508,6 @@ int sigpid = 0; #define SDB_FPSTATE 0x04 #endif -#if 0 /* in m68k */ -/* - * Send an interrupt to process. - */ -void -sendsig(catcher, sig, mask, code, type, val) - sig_t catcher; - int sig, mask; - u_long code; - int type; - union sigval val; -{ - register struct proc *p = curproc; - register struct sigframe *fp, *kfp; - register struct frame *frame; - register struct sigacts *psp = p->p_sigacts; - register short ft; - int oonstack, fsize; - extern char sigcode[], esigcode[]; - - frame = (struct frame *)p->p_md.md_regs; - ft = frame->f_format; - oonstack = psp->ps_sigstk.ss_flags & SS_ONSTACK; - - /* - * Allocate and validate space for the signal handler - * context. Note that if the stack is in P0 space, the - * call to grow() is a nop, and the useracc() check - * will fail if the process has not already allocated - * the space with a `brk'. - */ - fsize = sizeof(struct sigframe); - if ((psp->ps_flags & SAS_ALTSTACK) && !oonstack && - (psp->ps_sigonstack & sigmask(sig))) { - fp = (struct sigframe *)(psp->ps_sigstk.ss_sp + - psp->ps_sigstk.ss_size - fsize); - psp->ps_sigstk.ss_flags |= SS_ONSTACK; - } else - fp = (struct sigframe *)(frame->f_regs[SP] - fsize); - if ((unsigned)fp <= USRSTACK - ctob(p->p_vmspace->vm_ssize)) - (void)grow(p, (unsigned)fp); -#ifdef DEBUG - if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) - printf("sendsig(%d): sig %d ssp %x usp %x scp %x ft %d\n", - p->p_pid, sig, &oonstack, fp, &fp->sf_sc, ft); -#endif - if (useracc((caddr_t)fp, fsize, B_WRITE) == 0) { -#ifdef DEBUG - if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) - printf("sendsig(%d): useracc failed on sig %d\n", - p->p_pid, sig); -#endif - /* - * Process has trashed its stack; give it an illegal - * instruction to halt it in its tracks. - */ - SIGACTION(p, SIGILL) = SIG_DFL; - sig = sigmask(SIGILL); - p->p_sigignore &= ~sig; - p->p_sigcatch &= ~sig; - p->p_sigmask &= ~sig; - psignal(p, SIGILL); - return; - } - kfp = (struct sigframe *)malloc((u_long)fsize, M_TEMP, M_WAITOK); - /* - * Build the argument list for the signal handler. - */ - kfp->sf_signum = sig; - kfp->sf_sip = NULL; - kfp->sf_scp = &fp->sf_sc; - kfp->sf_handler = catcher; - /* - * Save necessary hardware state. Currently this includes: - * - general registers - * - original exception frame (if not a "normal" frame) - * - FP coprocessor state - */ - kfp->sf_state.ss_flags = SS_USERREGS; - bcopy((caddr_t)frame->f_regs, - (caddr_t)kfp->sf_state.ss_frame.f_regs, sizeof frame->f_regs); - if (ft >= FMT7) { -#ifdef DEBUG - if (ft > 15 || exframesize[ft] < 0) - panic("sendsig: bogus frame type"); -#endif - kfp->sf_state.ss_flags |= SS_RTEFRAME; - kfp->sf_state.ss_frame.f_format = frame->f_format; - kfp->sf_state.ss_frame.f_vector = frame->f_vector; - bcopy((caddr_t)&frame->F_u, - (caddr_t)&kfp->sf_state.ss_frame.F_u, - (size_t) exframesize[ft]); - /* - * Leave an indicator that we need to clean up the kernel - * stack. We do this by setting the "pad word" above the - * hardware stack frame to the amount the stack must be - * adjusted by. - * - * N.B. we increment rather than just set f_stackadj in - * case we are called from syscall when processing a - * sigreturn. In that case, f_stackadj may be non-zero. - */ - frame->f_stackadj += exframesize[ft]; - frame->f_format = frame->f_vector = 0; -#ifdef DEBUG - if (sigdebug & SDB_FOLLOW) - printf("sendsig(%d): copy out %d of frame %d\n", - p->p_pid, exframesize[ft], ft); -#endif - } - - if (fputype) { - kfp->sf_state.ss_flags |= SS_FPSTATE; - m68881_save(&kfp->sf_state.ss_fpstate); - } -#ifdef DEBUG - if ((sigdebug & SDB_FPSTATE) && *(char *)&kfp->sf_state.ss_fpstate) - printf("sendsig(%d): copy out FP state (%x) to %x\n", - p->p_pid, *(u_int *)&kfp->sf_state.ss_fpstate, - &kfp->sf_state.ss_fpstate); -#endif - - /* - * Build the signal context to be used by sigreturn. - */ - kfp->sf_sc.sc_onstack = oonstack; - kfp->sf_sc.sc_mask = mask; - kfp->sf_sc.sc_sp = frame->f_regs[SP]; - kfp->sf_sc.sc_fp = frame->f_regs[A6]; - kfp->sf_sc.sc_ap = (int)&fp->sf_state; - kfp->sf_sc.sc_pc = frame->f_pc; - kfp->sf_sc.sc_ps = frame->f_sr; - if (psp->ps_siginfo & sigmask(sig)) { - kfp->sf_sip = &fp->sf_si; - initsiginfo(&kfp->sf_si, sig, code, type, val); - } - /* XXX do not copy out siginfo if not needed */ - (void) copyout((caddr_t)kfp, (caddr_t)fp, fsize); - frame->f_regs[SP] = (int)fp; -#ifdef DEBUG - if (sigdebug & SDB_FOLLOW) - printf("sendsig(%d): sig %d scp %x fp %x sc_sp %x sc_ap %x\n", - p->p_pid, sig, kfp->sf_scp, fp, - kfp->sf_sc.sc_sp, kfp->sf_sc.sc_ap); -#endif - /* - * Signal trampoline code is at base of user stack. - */ - frame->f_pc = (int)PS_STRINGS - (esigcode - sigcode); -#ifdef DEBUG - if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) - printf("sendsig(%d): sig %d returns\n", - p->p_pid, sig); -#endif - free((caddr_t)kfp, M_TEMP); -} - -/* - * System call to cleanup state after a signal - * has been taken. Reset signal mask and - * stack state from context left by sendsig (above). - * Return to previous pc and psl as specified by - * context left by sendsig. Check carefully to - * make sure that the user has not modified the - * psl to gain improper priviledges or to cause - * a machine fault. - */ -int -sys_sigreturn(p, v, retval) - struct proc *p; - void *v; - register_t *retval; -{ - struct sys_sigreturn_args *uap = v; - register struct sigcontext *scp; - register struct frame *frame; - register int rf; - struct sigcontext tsigc; - struct sigstate tstate; - int flags; - - scp = SCARG(uap, sigcntxp); -#ifdef DEBUG - if (sigdebug & SDB_FOLLOW) - printf("sigreturn: pid %d, scp %x\n", p->p_pid, scp); -#endif - if ((int)scp & 1) - return (EINVAL); - - /* - * Test and fetch the context structure. - * We grab it all at once for speed. - */ - if (useracc((caddr_t)scp, sizeof (*scp), B_WRITE) == 0 || - copyin((caddr_t)scp, (caddr_t)&tsigc, sizeof tsigc)) - return (EINVAL); - scp = &tsigc; - if ((scp->sc_ps & (PSL_MBZ|PSL_IPL|PSL_S)) != 0) - return (EINVAL); - /* - * Restore the user supplied information - */ - if (scp->sc_onstack & 01) - p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK; - else - p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK; - p->p_sigmask = scp->sc_mask &~ sigcantmask; - frame = (struct frame *) p->p_md.md_regs; - frame->f_regs[SP] = scp->sc_sp; - frame->f_regs[A6] = scp->sc_fp; - frame->f_pc = scp->sc_pc; - frame->f_sr = scp->sc_ps; - - /* - * Grab pointer to hardware state information. - * If zero, the user is probably doing a longjmp. - */ - if ((rf = scp->sc_ap) == 0) - return (EJUSTRETURN); - /* - * See if there is anything to do before we go to the - * expense of copying in close to 1/2K of data - */ - flags = fuword((caddr_t)rf); -#ifdef DEBUG - if (sigdebug & SDB_FOLLOW) - printf("sigreturn(%d): sc_ap %x flags %x\n", - p->p_pid, rf, flags); -#endif - /* - * fuword failed (bogus sc_ap value). - */ - if (flags == -1) - return (EINVAL); - if (flags == 0 || copyin((caddr_t)rf, (caddr_t)&tstate, sizeof tstate)) - return (EJUSTRETURN); -#ifdef DEBUG - if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) - printf("sigreturn(%d): ssp %x usp %x scp %x ft %d\n", - p->p_pid, &flags, scp->sc_sp, SCARG(uap, sigcntxp), - (flags&SS_RTEFRAME) ? tstate.ss_frame.f_format : -1); -#endif - /* - * Restore most of the users registers except for A6 and SP - * which were handled above. - */ - if (flags & SS_USERREGS) - bcopy((caddr_t)tstate.ss_frame.f_regs, - (caddr_t)frame->f_regs, sizeof(frame->f_regs)-2*NBPW); - /* - * Restore long stack frames. Note that we do not copy - * back the saved SR or PC, they were picked up above from - * the sigcontext structure. - */ - if (flags & SS_RTEFRAME) { - register int sz; - - /* grab frame type and validate */ - sz = tstate.ss_frame.f_format; - if (sz > 15 || (sz = exframesize[sz]) < 0) - return (EINVAL); - frame->f_stackadj -= sz; - frame->f_format = tstate.ss_frame.f_format; - frame->f_vector = tstate.ss_frame.f_vector; - bcopy((caddr_t)&tstate.ss_frame.F_u, (caddr_t)&frame->F_u, sz); -#ifdef DEBUG - if (sigdebug & SDB_FOLLOW) - printf("sigreturn(%d): copy in %d of frame type %d\n", - p->p_pid, sz, tstate.ss_frame.f_format); -#endif - } - - /* - * Finally we restore the original FP context - */ - if (flags & SS_FPSTATE) - m68881_restore(&tstate.ss_fpstate); -#ifdef DEBUG - if ((sigdebug & SDB_FPSTATE) && *(char *)&tstate.ss_fpstate) - printf("sigreturn(%d): copied in FP state (%x) at %x\n", - p->p_pid, *(u_int *)&tstate.ss_fpstate, - &tstate.ss_fpstate); - if ((sigdebug & SDB_FOLLOW) || - ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)) - printf("sigreturn(%d): returns\n", p->p_pid); -#endif - return (EJUSTRETURN); -} -#endif - - /* * Do a sync in preparation for a reboot. * XXX - This could probably be common code. |