/* $NetBSD: irix_signal.c,v 1.5 2002/02/17 22:49:54 manu Exp $ */ /*- * Copyright (c) 1994, 2001-2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Christos Zoulas and Emmanuel Dreyfus. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 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. */ #include __KERNEL_RCSID(0, "$NetBSD: irix_signal.c,v 1.5 2002/02/17 22:49:54 manu Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern const int native_to_svr4_sig[]; extern const int svr4_to_native_sig[]; static int irix_setinfo __P((struct proc *, int, irix_irix5_siginfo_t *)); #define irix_sigmask(n) (1 << (((n) - 1) & 31)) #define irix_sigword(n) (((n) - 1) >> 5) #define irix_sigemptyset(s) memset((s), 0, sizeof(*(s))) #define irix_sigismember(s, n) ((s)->bits[irix_sigword(n)] & irix_sigmask(n)) #define irix_sigaddset(s, n) ((s)->bits[irix_sigword(n)] |= irix_sigmask(n)) /* * This is ripped from svr4_setinfo. See irix_sys_waitsys... */ int irix_setinfo(p, st, s) struct proc *p; int st; irix_irix5_siginfo_t *s; { irix_irix5_siginfo_t i; int sig; memset(&i, 0, sizeof(i)); i.isi_signo = SVR4_SIGCHLD; i.isi_errno = 0; /* XXX? */ if (p) { i.isi_pid = p->p_pid; if (p->p_stat == SZOMB) { i.isi_stime = p->p_ru->ru_stime.tv_sec; i.isi_utime = p->p_ru->ru_utime.tv_sec; } else { i.isi_stime = p->p_stats->p_ru.ru_stime.tv_sec; i.isi_utime = p->p_stats->p_ru.ru_utime.tv_sec; } } if (WIFEXITED(st)) { i.isi_status = WEXITSTATUS(st); i.isi_code = SVR4_CLD_EXITED; } else if (WIFSTOPPED(st)) { sig = WSTOPSIG(st); if (sig >= 0 && sig < NSIG) i.isi_status = native_to_svr4_sig[sig]; if (i.isi_status == SVR4_SIGCONT) i.isi_code = SVR4_CLD_CONTINUED; else i.isi_code = SVR4_CLD_STOPPED; } else { sig = WTERMSIG(st); if (sig >= 0 && sig < NSIG) i.isi_status = native_to_svr4_sig[sig]; if (WCOREDUMP(st)) i.isi_code = SVR4_CLD_DUMPED; else i.isi_code = SVR4_CLD_KILLED; } return copyout(&i, s, sizeof(i)); } void native_to_irix_sigset(bss, sss) const sigset_t *bss; irix_sigset_t *sss; { int i, newsig; irix_sigemptyset(sss); for (i = 1; i < NSIG; i++) { if (sigismember(bss, i)) { newsig = native_to_svr4_sig[i]; if (newsig) irix_sigaddset(sss, newsig); } } } void irix_to_native_sigset(sss, bss) const irix_sigset_t *sss; sigset_t *bss; { int i, newsig; sigemptyset(bss); for (i = 1; i < SVR4_NSIG; i++) { if (irix_sigismember(sss, i)) { newsig = svr4_to_native_sig[i]; if (newsig) sigaddset(bss, newsig); } } } void irix_sendsig(catcher, sig, mask, code) /* XXX Check me */ sig_t catcher; int sig; sigset_t *mask; u_long code; { struct proc *p = curproc; struct irix_sigcontext *fp; struct frame *f; int i,onstack; struct irix_sigcontext sc; #ifdef DEBUG_IRIX printf("irix_sendsig()\n"); printf("catcher = %p, sig = %d, code = 0x%lx\n", (void *)catcher, sig, code); #endif /* DEBUG_IRIX */ f = (struct frame *)p->p_md.md_regs; /* * Do we need to jump onto the signal stack? */ onstack = (p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 && (SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0; /* * not sure it works yet. */ onstack=0; /* * Allocate space for the signal handler context. */ if (onstack) fp = (struct irix_sigcontext *) ((caddr_t)p->p_sigctx.ps_sigstk.ss_sp + p->p_sigctx.ps_sigstk.ss_size); else /* cast for _MIPS_BSD_API == _MIPS_BSD_API_LP32_64CLEAN case */ fp = (struct irix_sigcontext *)(u_int32_t)f->f_regs[SP]; /* * Build stack frame for signal trampoline. */ memset(&sc, 0, sizeof sc); native_to_irix_sigset(mask, &sc.isc_sigset); for (i = 1; i < 32; i++) { /* save gpr1 - gpr31 */ sc.isc_regs[i] = f->f_regs[i]; } sc.isc_regs[0] = 0; sc.isc_fp_rounded_result = 0; sc.isc_regmask = ~0x1UL; sc.isc_mdhi = f->f_regs[MULHI]; sc.isc_mdlo = f->f_regs[MULLO]; sc.isc_pc = f->f_regs[PC]; sc.isc_ownedfp = 0; sc.isc_ssflags = 0; /* * Save signal stack. XXX broken */ /* kregs.sc_onstack = p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK; */ /* * Install the sigframe onto the stack */ fp = (struct irix_sigcontext *)((unsigned long)fp - sizeof(struct irix_sigcontext)); fp = (struct irix_sigcontext *)((unsigned long)fp & ~0xfUL); /* 16 bytes alignement */ if (copyout(&sc, fp, sizeof(sc)) != 0) { /* * Process has trashed its stack; give it an illegal * instruction to halt it in its tracks. */ #ifdef DEBUG_IRIX printf("irix_sendsig: stack trashed\n"); #endif /* DEBUG_IRIX */ sigexit(p, SIGILL); /* NOTREACHED */ } /* Set up the registers to return to sigcode. */ f->f_regs[A0] = native_to_svr4_sig[sig]; f->f_regs[A1] = 0; f->f_regs[A2] = (unsigned long)fp; #ifdef DEBUG_IRIX printf("sigcontext is at %p\n", fp); #endif /* DEBUG_IRIX */ f->f_regs[RA] = (unsigned long)p->p_sigctx.ps_sigcode; f->f_regs[SP] = (unsigned long)fp; f->f_regs[T9] = (unsigned long)catcher; f->f_regs[A3] = (unsigned long)catcher; f->f_regs[PC] = (unsigned long)catcher; /* Remember that we're now on the signal stack. */ if (onstack) p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK; #ifdef DEBUG_IRIX printf("returning from irix_sendsig()\n"); #endif return; } int irix_sys_sigreturn(p, v, retval) struct proc *p; void *v; register_t *retval; { struct irix_sys_sigreturn_args /* { syscallarg(struct irix_sigreturna) isr; } */ *uap = v; struct irix_sigcontext *sc, ksc; struct frame *f; sigset_t mask; int i, error; #ifdef DEBUG_IRIX printf("irix_sys_sigreturn()\n"); printf("scp = %p, ucp = %p, sig = %d (%p)\n", (void *)SCARG(uap, isr).scp, (void *)SCARG(uap, isr).ucp, SCARG(uap, isr).signo, (void *)SCARG(uap, isr).signo); #endif /* DEBUG_IRIX */ /* * The trampoline code hands us the context. * It is unsafe to keep track of it ourselves, in the event that a * program jumps out of a signal handler. */ sc = SCARG(uap, isr).scp; if (sc == NULL) sc = SCARG(uap, isr).ucp; if ((error = copyin(sc, &ksc, sizeof(ksc))) != 0) return (error); /* Restore the register context. */ f = (struct frame *)p->p_md.md_regs; for (i = 1; i < 32; i++) /* restore gpr1 to gpr31 */ f->f_regs[i] = ksc.isc_regs[i]; f->f_regs[MULLO] = ksc.isc_mdlo; f->f_regs[MULHI] = ksc.isc_mdhi; f->f_regs[PC] = ksc.isc_pc; /* Restore signal stack. */ p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK; /* Restore signal mask. */ irix_to_native_sigset((irix_sigset_t *)&ksc.isc_sigset, &mask); (void)sigprocmask1(p, SIG_SETMASK, &mask, 0); #ifdef DEBUG_IRIX printf("irix_sys_sigreturn(): returning\n"); #endif return (EJUSTRETURN); } int irix_sys_sginap(p, v, retval) struct proc *p; void *v; register_t *retval; { struct irix_sys_sginap_args /* { syscallarg(long) ticks; } */ *uap = v; int rticks = SCARG(uap, ticks); struct timeval tvb, tve, tvd; long long delta; int dontcare; if (rticks != 0) microtime(&tvb); if ((tsleep(&dontcare, PCATCH, 0, rticks) != 0) && (rticks != 0)) { microtime(&tve); timersub(&tve, &tvb, &tvd); delta = ((tvd.tv_sec * 1000000) + tvd.tv_usec); /* XXX */ *retval = (register_t)(rticks - (delta / tick)); } return 0; } /* * XXX Untested. Expect bugs and security problems here */ int irix_sys_getcontext(p, v, retval) struct proc *p; void *v; register_t *retval; { struct irix_sys_getcontext_args /* { syscallarg(struct irix_ucontext *) ucp; } */ *uap = v; struct frame *f; struct irix_ucontext kucp; int i, error; f = (struct frame *)p->p_md.md_regs; kucp.iuc_flags = IRIX_UC_ALL; kucp.iuc_link = NULL; /* XXX */ native_to_irix_sigset(&p->p_sigctx.ps_sigmask, &kucp.iuc_sigmask); kucp.iuc_stack.ss_sp = p->p_sigctx.ps_sigstk.ss_sp; kucp.iuc_stack.ss_size = p->p_sigctx.ps_sigstk.ss_size; kucp.iuc_stack.ss_flags = 0; if (p->p_sigctx.ps_sigstk.ss_flags & SS_ONSTACK) kucp.iuc_stack.ss_flags &= IRIX_SS_ONSTACK; if (p->p_sigctx.ps_sigstk.ss_flags & SS_DISABLE) kucp.iuc_stack.ss_flags &= IRIX_SS_DISABLE; for (i = 0; i < 36; i++) /* Is order correct? */ kucp.iuc_mcontext.svr4___gregs[i] = f->f_regs[i]; for (i = 0; i < 32; i++) kucp.iuc_mcontext.svr4___fpregs.svr4___fp_r.svr4___fp_regs[i] = 0; /* XXX where are FP registers? */ for (i = 0; i < 47; i++) kucp.iuc_filler[i] = 0; /* XXX */ kucp.iuc_triggersave = 0; /* XXX */ error = copyout(&kucp, SCARG(uap, ucp), sizeof(kucp)); return error; } /* * XXX Untested. Expect bugs and security problems here */ int irix_sys_setcontext(p, v, retval) struct proc *p; void *v; register_t *retval; { struct irix_sys_setcontext_args /* { syscallarg(struct irix_ucontext *) ucp; } */ *uap = v; struct frame *f; struct irix_ucontext kucp; int i, error; error = copyin(SCARG(uap, ucp), &kucp, sizeof(kucp)); if (error) goto out; f = (struct frame *)p->p_md.md_regs; if (kucp.iuc_flags & IRIX_UC_SIGMASK) irix_to_native_sigset(&kucp.iuc_sigmask, &p->p_sigctx.ps_sigmask); if (kucp.iuc_flags & IRIX_UC_STACK) { p->p_sigctx.ps_sigstk.ss_sp = kucp.iuc_stack.ss_sp; p->p_sigctx.ps_sigstk.ss_size = (unsigned long)kucp.iuc_stack.ss_sp; p->p_sigctx.ps_sigstk.ss_flags = 0; if (kucp.iuc_stack.ss_flags & IRIX_SS_ONSTACK) p->p_sigctx.ps_sigstk.ss_flags &= SS_ONSTACK; if (kucp.iuc_stack.ss_flags & IRIX_SS_DISABLE) p->p_sigctx.ps_sigstk.ss_flags &= SS_DISABLE; } if (kucp.iuc_flags & IRIX_UC_CPU) for (i = 0; i < 36; i++) /* Is register order right? */ f->f_regs[i] = kucp.iuc_mcontext.svr4___gregs[i]; if (kucp.iuc_flags & IRIX_UC_MAU) { /* XXX */ #ifdef DEBUG_IRIX printf("irix_sys_setcontext(): IRIX_UC_MAU requested\n"); #endif } out: return error; } /* * The following code is from svr4_sys_waitsys(), with a few lines added * for supporting the rusage argument which is present in the IRIX version * and not in the SVR4 version. * Both version could be merged by creating a svr4_sys_waitsys1() with the * rusage argument, and by calling it with NULL from svr4_sys_waitsys(). * irix_setinfo is here because 1) svr4_setinfo is static and cannot be * used here and 2) because struct irix_irix5_siginfo is quite different * from svr4_siginfo. In order to merge, we need to include irix_signal.h * from svr4_misc.c, or push the irix_irix5_siginfo into svr4_siginfo.h */ int irix_sys_waitsys(p, v, retval) struct proc *p; void *v; register_t *retval; { struct irix_sys_waitsys_args /* { syscallarg(int) type; syscallarg(int) pid; syscallarg(struct irix_irix5_siginfo *) info; syscallarg(int) options; syscallarg(struct rusage *) ru; } */ *uap = v; int nfound, error, s; struct proc *q, *t; switch (SCARG(uap, type)) { case SVR4_P_PID: break; case SVR4_P_PGID: SCARG(uap, pid) = -p->p_pgid; break; case SVR4_P_ALL: SCARG(uap, pid) = WAIT_ANY; break; default: return EINVAL; } #ifdef DEBUG_IRIX printf("waitsys(%d, %d, %p, %x)\n", SCARG(uap, type), SCARG(uap, pid), SCARG(uap, info), SCARG(uap, options)); #endif loop: nfound = 0; for (q = p->p_children.lh_first; q != 0; q = q->p_sibling.le_next) { if (SCARG(uap, pid) != WAIT_ANY && q->p_pid != SCARG(uap, pid) && q->p_pgid != -SCARG(uap, pid)) { #ifdef DEBUG_IRIX printf("pid %d pgid %d != %d\n", q->p_pid, q->p_pgid, SCARG(uap, pid)); #endif continue; } nfound++; if (q->p_stat == SZOMB && ((SCARG(uap, options) & (SVR4_WEXITED|SVR4_WTRAPPED)))) { *retval = 0; #ifdef DEBUG_IRIX printf("found %d\n", q->p_pid); #endif if ((error = irix_setinfo(q, q->p_xstat, SCARG(uap, info))) != 0) return error; if ((SCARG(uap, options) & SVR4_WNOWAIT)) { #ifdef DEBUG_IRIX printf(("Don't wait\n")); #endif return 0; } if (SCARG(uap, ru) && (error = copyout((caddr_t)p->p_ru, (caddr_t)SCARG(uap, ru), sizeof(struct rusage)))) return (error); /* * If we got the child via ptrace(2) or procfs, and * the parent is different (meaning the process was * attached, rather than run as a child), then we need * to give it back to the old parent, and send the * parent a SIGCHLD. The rest of the cleanup will be * done when the old parent waits on the child. */ if ((q->p_flag & P_TRACED) && q->p_oppid != q->p_pptr->p_pid) { t = pfind(q->p_oppid); proc_reparent(q, t ? t : initproc); q->p_oppid = 0; q->p_flag &= ~(P_TRACED|P_WAITED|P_FSTRACE); psignal(q->p_pptr, SIGCHLD); wakeup((caddr_t)q->p_pptr); return (0); } q->p_xstat = 0; ruadd(&p->p_stats->p_cru, q->p_ru); pool_put(&rusage_pool, q->p_ru); /* * Finally finished with old proc entry. * Unlink it from its process group and free it. */ leavepgrp(q); s = proclist_lock_write(); LIST_REMOVE(q, p_list); /* off zombproc */ proclist_unlock_write(s); LIST_REMOVE(q, p_sibling); /* * Decrement the count of procs running with this uid. */ (void)chgproccnt(q->p_cred->p_ruid, -1); /* * Free up credentials. */ if (--q->p_cred->p_refcnt == 0) { crfree(q->p_cred->pc_ucred); pool_put(&pcred_pool, q->p_cred); } /* * Release reference to text vnode */ if (q->p_textvp) vrele(q->p_textvp); pool_put(&proc_pool, q); nprocs--; return 0; } if (q->p_stat == SSTOP && (q->p_flag & P_WAITED) == 0 && (q->p_flag & P_TRACED || (SCARG(uap, options) & (SVR4_WSTOPPED|SVR4_WCONTINUED)))) { #ifdef DEBUG_IRIX printf("jobcontrol %d\n", q->p_pid); #endif if (((SCARG(uap, options) & SVR4_WNOWAIT)) == 0) q->p_flag |= P_WAITED; *retval = 0; return irix_setinfo(q, W_STOPCODE(q->p_xstat), SCARG(uap, info)); } } if (nfound == 0) return ECHILD; if (SCARG(uap, options) & SVR4_WNOHANG) { *retval = 0; if ((error = irix_setinfo(NULL, 0, SCARG(uap, info))) != 0) return error; return 0; } if ((error = tsleep((caddr_t)p, PWAIT | PCATCH, "svr4_wait", 0)) != 0) return error; goto loop; }