+++ /dev/null
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-/* $NetBSD: procfs_ctl.c,v 1.12 1994/06/29 06:34:46 cgd Exp $ */
-
-/*
- * Copyright (c) 1993 Jan-Simon Pendry
- * Copyright (c) 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Jan-Simon Pendry.
- *
- * 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 University of
- * California, Berkeley and its contributors.
- * 4. 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.
- *
- * @(#)procfs_ctl.c 8.4 (Berkeley) 6/15/94
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/time.h>
-#include <sys/kernel.h>
-#include <sys/proc.h>
-#include <sys/vnode.h>
-#include <sys/ioctl.h>
-#include <sys/tty.h>
-#include <sys/resource.h>
-#include <sys/resourcevar.h>
-#include <sys/ptrace.h>
-#include <miscfs/procfs/procfs.h>
-
-/*
- * True iff process (p) is in trace wait state
- * relative to process (curp)
- */
-#define TRACE_WAIT_P(curp, p) \
- ((p)->p_stat == SSTOP && \
- (p)->p_pptr == (curp) && \
- ((p)->p_flag & P_TRACED))
-
-#define PROCFS_CTL_ATTACH 1
-#define PROCFS_CTL_DETACH 2
-#define PROCFS_CTL_STEP 3
-#define PROCFS_CTL_RUN 4
-#define PROCFS_CTL_WAIT 5
-
-static vfs_namemap_t ctlnames[] = {
- /* special /proc commands */
- { "attach", PROCFS_CTL_ATTACH },
- { "detach", PROCFS_CTL_DETACH },
- { "step", PROCFS_CTL_STEP },
- { "run", PROCFS_CTL_RUN },
- { "wait", PROCFS_CTL_WAIT },
- { 0 },
-};
-
-static vfs_namemap_t signames[] = {
- /* regular signal names */
- { "hup", SIGHUP }, { "int", SIGINT },
- { "quit", SIGQUIT }, { "ill", SIGILL },
- { "trap", SIGTRAP }, { "abrt", SIGABRT },
- { "iot", SIGIOT }, { "emt", SIGEMT },
- { "fpe", SIGFPE }, { "kill", SIGKILL },
- { "bus", SIGBUS }, { "segv", SIGSEGV },
- { "sys", SIGSYS }, { "pipe", SIGPIPE },
- { "alrm", SIGALRM }, { "term", SIGTERM },
- { "urg", SIGURG }, { "stop", SIGSTOP },
- { "tstp", SIGTSTP }, { "cont", SIGCONT },
- { "chld", SIGCHLD }, { "ttin", SIGTTIN },
- { "ttou", SIGTTOU }, { "io", SIGIO },
- { "xcpu", SIGXCPU }, { "xfsz", SIGXFSZ },
- { "vtalrm", SIGVTALRM }, { "prof", SIGPROF },
- { "winch", SIGWINCH }, { "info", SIGINFO },
- { "usr1", SIGUSR1 }, { "usr2", SIGUSR2 },
- { 0 },
-};
-
-static int
-procfs_control(curp, p, op)
- struct proc *curp;
- struct proc *p;
- int op;
-{
- int error;
-
- /*
- * Attach - attaches the target process for debugging
- * by the calling process.
- */
- if (op == PROCFS_CTL_ATTACH) {
- /* check whether already being traced */
- if (p->p_flag & P_TRACED)
- return (EBUSY);
-
- /* can't trace yourself! */
- if (p->p_pid == curp->p_pid)
- return (EINVAL);
-
- /*
- * Go ahead and set the trace flag.
- * Save the old parent (it's reset in
- * _DETACH, and also in kern_exit.c:wait4()
- * Reparent the process so that the tracing
- * proc gets to see all the action.
- * Stop the target.
- */
- p->p_flag |= P_TRACED;
- p->p_xstat = 0; /* XXX ? */
- if (p->p_pptr != curp) {
- p->p_oppid = p->p_pptr->p_pid;
- proc_reparent(p, curp);
- }
- psignal(p, SIGSTOP);
- return (0);
- }
-
- /*
- * Target process must be stopped, owned by (curp) and
- * be set up for tracing (P_TRACED flag set).
- * Allow DETACH to take place at any time for sanity.
- * Allow WAIT any time, of course.
- */
- switch (op) {
- case PROCFS_CTL_DETACH:
- case PROCFS_CTL_WAIT:
- break;
-
- default:
- if (!TRACE_WAIT_P(curp, p))
- return (EBUSY);
- }
-
- /*
- * do single-step fixup if needed
- */
- FIX_SSTEP(p);
-
- /*
- * Don't deliver any signal by default.
- * To continue with a signal, just send
- * the signal name to the ctl file
- */
- p->p_xstat = 0;
-
- switch (op) {
- /*
- * Detach. Cleans up the target process, reparent it if possible
- * and set it running once more.
- */
- case PROCFS_CTL_DETACH:
- /* if not being traced, then this is a painless no-op */
- if ((p->p_flag & P_TRACED) == 0)
- return (0);
-
- /* not being traced any more */
- p->p_flag &= ~P_TRACED;
-
- /* give process back to original parent */
- if (p->p_oppid != p->p_pptr->p_pid) {
- struct proc *pp;
-
- pp = pfind(p->p_oppid);
- if (pp)
- proc_reparent(p, pp);
- }
-
- p->p_oppid = 0;
- p->p_flag &= ~P_WAITED; /* XXX ? */
- wakeup((caddr_t) curp); /* XXX for CTL_WAIT below ? */
-
- break;
-
- /*
- * Step. Let the target process execute a single instruction.
- */
- case PROCFS_CTL_STEP:
- if (error = process_sstep(p, 1))
- return (error);
- break;
-
- /*
- * Run. Let the target process continue running until a breakpoint
- * or some other trap.
- */
- case PROCFS_CTL_RUN:
- break;
-
- /*
- * Wait for the target process to stop.
- * If the target is not being traced then just wait
- * to enter
- */
- case PROCFS_CTL_WAIT:
- error = 0;
- if (p->p_flag & P_TRACED) {
- while (error == 0 &&
- (p->p_stat != SSTOP) &&
- (p->p_flag & P_TRACED) &&
- (p->p_pptr == curp)) {
- error = tsleep((caddr_t) p,
- PWAIT|PCATCH, "procfsx", 0);
- }
- if (error == 0 && !TRACE_WAIT_P(curp, p))
- error = EBUSY;
- } else {
- while (error == 0 && p->p_stat != SSTOP) {
- error = tsleep((caddr_t) p,
- PWAIT|PCATCH, "procfs", 0);
- }
- }
- return (error);
-
- default:
- panic("procfs_control");
- }
-
- if (p->p_stat == SSTOP)
- setrunnable(p);
- return (0);
-}
-
-int
-procfs_doctl(curp, p, pfs, uio)
- struct proc *curp;
- struct pfsnode *pfs;
- struct uio *uio;
- struct proc *p;
-{
- int xlen;
- int error;
- char msg[PROCFS_CTLLEN+1];
- vfs_namemap_t *nm;
-
- if (uio->uio_rw != UIO_WRITE)
- return (EOPNOTSUPP);
-
- xlen = PROCFS_CTLLEN;
- error = vfs_getuserstr(uio, msg, &xlen);
- if (error)
- return (error);
-
- /*
- * Map signal names into signal generation
- * or debug control. Unknown commands and/or signals
- * return EOPNOTSUPP.
- *
- * Sending a signal while the process is being debugged
- * also has the side effect of letting the target continue
- * to run. There is no way to single-step a signal delivery.
- */
- error = EOPNOTSUPP;
-
- nm = vfs_findname(ctlnames, msg, xlen);
- if (nm) {
- error = procfs_control(curp, p, nm->nm_val);
- } else {
- nm = vfs_findname(signames, msg, xlen);
- if (nm) {
- if (TRACE_WAIT_P(curp, p)) {
- p->p_xstat = nm->nm_val;
- FIX_SSTEP(p);
- setrunnable(p);
- } else {
- psignal(p, nm->nm_val);
- }
- error = 0;
- }
- }
-
- return (error);
-}
projects / apple / xnu.git / blobdiff