NetBSD/sys/kern/sys_ptrace.c

221 lines
6.5 KiB
C

/* $NetBSD: sys_ptrace.c,v 1.11 2020/11/04 19:16:34 pgoyette Exp $ */
/*-
* Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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.
*
* 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.
*/
/*-
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* 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. 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.
*
* from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sys_ptrace.c,v 1.11 2020/11/04 19:16:34 pgoyette Exp $");
#ifdef _KERNEL_OPT
#include "opt_ptrace.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/exec.h>
#include <sys/pax.h>
#include <sys/ptrace.h>
#include <sys/uio.h>
#include <sys/ras.h>
#include <sys/kmem.h>
#include <sys/kauth.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <sys/syscallvar.h>
#include <sys/syscall.h>
#include <sys/module.h>
#include <uvm/uvm_extern.h>
#include <machine/reg.h>
/*
* PTRACE methods
*/
static int
ptrace_copyin_piod(struct ptrace_io_desc *piod, const void *addr, size_t len)
{
if (len != 0 && sizeof(*piod) != len)
return EINVAL;
return copyin(addr, piod, sizeof(*piod));
}
static int
ptrace_copyout_piod(const struct ptrace_io_desc *piod, void *addr, size_t len)
{
if (len != 0 && sizeof(*piod) != len)
return EINVAL;
return copyout(piod, addr, sizeof(*piod));
}
static int
ptrace_copyin_siginfo(struct ptrace_siginfo *psi, const void *addr, size_t len)
{
if (sizeof(*psi) != len)
return EINVAL;
return copyin(addr, psi, sizeof(*psi));
}
static int
ptrace_copyout_siginfo(const struct ptrace_siginfo *psi, void *addr, size_t len)
{
if (sizeof(*psi) != len)
return EINVAL;
return copyout(psi, addr, sizeof(*psi));
}
static int
ptrace_copyout_lwpstatus(const struct ptrace_lwpstatus *pls, void *addr,
size_t len)
{
return copyout(pls, addr, len);
}
static struct ptrace_methods native_ptm = {
.ptm_copyin_piod = ptrace_copyin_piod,
.ptm_copyout_piod = ptrace_copyout_piod,
.ptm_copyin_siginfo = ptrace_copyin_siginfo,
.ptm_copyout_siginfo = ptrace_copyout_siginfo,
.ptm_copyout_lwpstatus = ptrace_copyout_lwpstatus,
.ptm_doregs = process_doregs,
.ptm_dofpregs = process_dofpregs,
.ptm_dodbregs = process_dodbregs,
};
static const struct syscall_package ptrace_syscalls[] = {
{ SYS_ptrace, 0, (sy_call_t *)sys_ptrace },
{ 0, 0, NULL },
};
/*
* Process debugging system call.
*/
int
sys_ptrace(struct lwp *l, const struct sys_ptrace_args *uap, register_t *retval)
{
/* {
syscallarg(int) req;
syscallarg(pid_t) pid;
syscallarg(void *) addr;
syscallarg(int) data;
} */
return do_ptrace(&native_ptm, l, SCARG(uap, req), SCARG(uap, pid),
SCARG(uap, addr), SCARG(uap, data), retval);
}
#define DEPS "ptrace_common"
MODULE(MODULE_CLASS_EXEC, ptrace, DEPS);
static int
ptrace_init(void)
{
int error;
error = syscall_establish(&emul_netbsd, ptrace_syscalls);
return error;
}
static int
ptrace_fini(void)
{
int error;
error = syscall_disestablish(&emul_netbsd, ptrace_syscalls);
return error;
}
static int
ptrace_modcmd(modcmd_t cmd, void *arg)
{
int error;
switch (cmd) {
case MODULE_CMD_INIT:
error = ptrace_init();
break;
case MODULE_CMD_FINI:
error = ptrace_fini();
break;
default:
error = ENOTTY;
break;
}
return error;
}