221 lines
6.4 KiB
C
221 lines
6.4 KiB
C
/* $NetBSD: sys_ptrace.c,v 1.12 2022/07/10 14:07:55 riastradh Exp $ */
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/*-
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* Copyright (c) 2008, 2009 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 Andrew Doran.
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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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*
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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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/*-
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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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. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: sys_ptrace.c,v 1.12 2022/07/10 14:07:55 riastradh Exp $");
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#ifdef _KERNEL_OPT
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#include "opt_ptrace.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/errno.h>
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#include <sys/exec.h>
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#include <sys/pax.h>
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#include <sys/ptrace.h>
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#include <sys/uio.h>
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#include <sys/ras.h>
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#include <sys/kmem.h>
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#include <sys/kauth.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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#include <sys/syscallvar.h>
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#include <sys/syscall.h>
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#include <sys/module.h>
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#include <uvm/uvm_extern.h>
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#include <machine/reg.h>
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/*
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* PTRACE methods
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*/
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static int
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ptrace_copyin_piod(struct ptrace_io_desc *piod, const void *addr, size_t len)
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{
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if (len != 0 && sizeof(*piod) != len)
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return EINVAL;
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return copyin(addr, piod, sizeof(*piod));
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}
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static int
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ptrace_copyout_piod(const struct ptrace_io_desc *piod, void *addr, size_t len)
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{
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if (len != 0 && sizeof(*piod) != len)
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return EINVAL;
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return copyout(piod, addr, sizeof(*piod));
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}
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static int
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ptrace_copyin_siginfo(struct ptrace_siginfo *psi, const void *addr, size_t len)
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{
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if (sizeof(*psi) != len)
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return EINVAL;
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return copyin(addr, psi, sizeof(*psi));
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}
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static int
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ptrace_copyout_siginfo(const struct ptrace_siginfo *psi, void *addr, size_t len)
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{
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if (sizeof(*psi) != len)
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return EINVAL;
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return copyout(psi, addr, sizeof(*psi));
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}
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static int
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ptrace_copyout_lwpstatus(const struct ptrace_lwpstatus *pls, void *addr,
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size_t len)
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{
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return copyout(pls, addr, len);
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}
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static struct ptrace_methods native_ptm = {
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.ptm_copyin_piod = ptrace_copyin_piod,
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.ptm_copyout_piod = ptrace_copyout_piod,
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.ptm_copyin_siginfo = ptrace_copyin_siginfo,
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.ptm_copyout_siginfo = ptrace_copyout_siginfo,
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.ptm_copyout_lwpstatus = ptrace_copyout_lwpstatus,
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.ptm_doregs = process_doregs,
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.ptm_dofpregs = process_dofpregs,
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.ptm_dodbregs = process_dodbregs,
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};
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static const struct syscall_package ptrace_syscalls[] = {
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{ SYS_ptrace, 0, (sy_call_t *)sys_ptrace },
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{ 0, 0, NULL },
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};
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/*
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* Process debugging system call.
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*/
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int
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sys_ptrace(struct lwp *l, const struct sys_ptrace_args *uap, register_t *retval)
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{
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/* {
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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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} */
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return do_ptrace(&native_ptm, l, SCARG(uap, req), SCARG(uap, pid),
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SCARG(uap, addr), SCARG(uap, data), retval);
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}
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#define DEPS "ptrace_common"
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MODULE(MODULE_CLASS_EXEC, ptrace, DEPS);
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static int
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ptrace_init(void)
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{
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int error;
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error = syscall_establish(&emul_netbsd, ptrace_syscalls);
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return error;
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}
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static int
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ptrace_fini(void)
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{
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int error;
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error = syscall_disestablish(&emul_netbsd, ptrace_syscalls);
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return error;
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}
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static int
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ptrace_modcmd(modcmd_t cmd, void *arg)
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{
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int error;
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switch (cmd) {
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case MODULE_CMD_INIT:
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error = ptrace_init();
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break;
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case MODULE_CMD_FINI:
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error = ptrace_fini();
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break;
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default:
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error = ENOTTY;
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break;
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}
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return error;
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}
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