240 lines
6.1 KiB
C
240 lines
6.1 KiB
C
/* $NetBSD: darwin_ptrace.c,v 1.12 2007/03/04 06:01:14 christos Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: darwin_ptrace.c,v 1.12 2007/03/04 06:01:14 christos Exp $");
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#include "opt_ptrace.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/ptrace.h>
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#include <sys/syscall.h>
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#include <sys/syscallargs.h>
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#include <compat/sys/signal.h>
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#include <compat/mach/mach_types.h>
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#include <compat/mach/mach_vm.h>
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#include <compat/darwin/darwin_exec.h>
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#include <compat/darwin/darwin_audit.h>
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#include <compat/darwin/darwin_ptrace.h>
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#include <compat/darwin/darwin_syscallargs.h>
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#define ISSET(t, f) ((t) & (f))
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int
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darwin_sys_ptrace(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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#if defined(PTRACE) || defined(_LKM)
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struct darwin_sys_ptrace_args /* {
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syscallarg(int) req;
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syscallarg(pid_t) pid;
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syscallarg(void *) addr;
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syscallarg(int) data;
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} */ *uap = v;
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int req = SCARG(uap, req);
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struct proc *p = l->l_proc;
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struct darwin_emuldata *ded = NULL;
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struct proc *t; /* target process */
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int error;
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#ifdef _LKM
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#define sys_ptrace (*sysent[SYS_ptrace].sy_call)
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if (sys_ptrace == sys_nosys)
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return ENOSYS;
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#endif
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/* XXXAD locking */
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ded = (struct darwin_emuldata *)p->p_emuldata;
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switch (req) {
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case DARWIN_PT_ATTACHEXC:
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if ((t = pfind(SCARG(uap, pid))) == NULL)
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return ESRCH;
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if (t->p_emul != &emul_darwin)
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return ESRCH;
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ded = t->p_emuldata;
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if (ded->ded_flags & DARWIN_DED_SIGEXC)
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return EBUSY;
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ded->ded_flags |= DARWIN_DED_SIGEXC;
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SCARG(uap, req) = PT_ATTACH;
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if ((error = sys_ptrace(l, v, retval)) != 0)
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ded->ded_flags &= ~DARWIN_DED_SIGEXC;
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return error;
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break;
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case DARWIN_PT_SIGEXC:
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if ((p->p_slflag & PSL_TRACED) == 0)
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return EBUSY;
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ded->ded_flags |= DARWIN_DED_SIGEXC;
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break;
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case DARWIN_PT_DETACH: {
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int had_sigexc = 0;
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if ((t = pfind(SCARG(uap, pid))) == NULL)
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return (ESRCH);
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if ((t->p_emul == &emul_darwin) &&
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(t->p_slflag & PSL_TRACED) &&
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(t->p_pptr == p)) {
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ded = t->p_emuldata;
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if (ded->ded_flags & DARWIN_DED_SIGEXC) {
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had_sigexc = 1;
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ded->ded_flags &= ~DARWIN_DED_SIGEXC;
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}
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}
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/*
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* If the process is not marked as stopped,
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* sys_ptrace sanity checks will return EBUSY.
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*/
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mutex_enter(&proclist_mutex);
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mutex_enter(&t->p_smutex);
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proc_stop(t, 0, SIGSTOP);
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mutex_exit(&t->p_smutex);
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mutex_exit(&proclist_mutex);
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if ((error = sys_ptrace(l, v, retval)) != 0) {
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mutex_enter(&proclist_mutex);
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mutex_enter(&t->p_smutex);
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proc_unstop(t);
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mutex_exit(&t->p_smutex);
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mutex_exit(&proclist_mutex);
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if (had_sigexc)
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ded->ded_flags |= DARWIN_DED_SIGEXC;
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}
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break;
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}
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case DARWIN_PT_THUPDATE: {
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int signo = SCARG(uap, data);
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if ((t = pfind(SCARG(uap, pid))) == NULL)
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return ESRCH;
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/* Checks from native ptrace */
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if (!ISSET(t->p_slflag, PSL_TRACED))
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return EPERM;
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if (ISSET(t->p_slflag, PSL_FSTRACE))
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return EBUSY;
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if (t->p_pptr != p)
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return EBUSY;
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#if 0
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if (t->p_stat != SSTOP || !ISSET(t->p_sflag, PS_WAITED))
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return EBUSY;
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#endif
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if ((signo < 0) || (signo > NSIG))
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return EINVAL;
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t->p_xstat = signo;
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if (signo != 0)
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sigaddset(&p->p_sigpend.sp_set, signo);
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break;
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}
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case DARWIN_PT_READ_U:
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case DARWIN_PT_WRITE_U:
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case DARWIN_PT_STEP:
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case DARWIN_PT_FORCEQUOTA:
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case DARWIN_PT_DENY_ATTACH:
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printf("darwin_sys_ptrace: unimplemented command %d\n", req);
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break;
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/* The other ptrace commands are the same on NetBSD */
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default:
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return sys_ptrace(l, v, retval);
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break;
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}
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return 0;
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#else
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return ENOSYS;
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#endif /* PTRACE || _LKM */
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}
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int
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darwin_sys_kdebug_trace(struct lwp *l, void *v,
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register_t *retval)
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{
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struct darwin_sys_kdebug_trace_args /* {
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syscallarg(int) debugid;
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syscallarg(int) arg1;
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syscallarg(int) arg2;
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syscallarg(int) arg3;
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syscallarg(int) arg4;
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syscallarg(int) arg5;
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} */ *uap = v;
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int args[4];
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char *str;
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args[0] = SCARG(uap, arg1);
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args[1] = SCARG(uap, arg2);
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args[2] = SCARG(uap, arg3);
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args[3] = 0;
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str = (char*)args;
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#ifdef DEBUG_DARWIN
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printf("darwin_sys_kdebug_trace(%x, (%x %x %x)/\"%s\", %x, %x)\n",
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SCARG(uap, debugid), SCARG(uap, arg1), SCARG(uap, arg2),
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SCARG(uap, arg3), str, SCARG(uap, arg4), SCARG(uap, arg5));
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#endif
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return 0;
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}
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