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/* $OpenBSD: freebsd_ptrace.c,v 1.6 2003/06/02 23:28:00 millert Exp $ */
/* $NetBSD: freebsd_ptrace.c,v 1.2 1996/05/03 17:03:12 christos Exp $ */
/*-
* Copyright (c) 1994 Christopher G. Demetriou. All rights reserved.
* 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.
*
* 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/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/errno.h>
#include <sys/ptrace.h>
#include <sys/uio.h>
#include <sys/user.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <machine/reg.h>
#include <machine/freebsd_machdep.h>
#include <compat/freebsd/freebsd_signal.h>
#include <compat/freebsd/freebsd_syscallargs.h>
#include <compat/freebsd/freebsd_util.h>
#include <compat/freebsd/freebsd_ptrace.h>
/*
* Process debugging system call.
*/
int
freebsd_sys_ptrace(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_ptrace_args /* {
syscallarg(int) req;
syscallarg(pid_t) pid;
syscallarg(caddr_t) addr;
syscallarg(int) data;
} */ *uap = v;
int error;
caddr_t sg;
struct {
struct reg regs;
struct fpreg fpregs;
} *nrp;
struct sys_ptrace_args npa;
struct freebsd_ptrace_reg fr;
switch (SCARG(uap, req)) {
#ifdef PT_STEP
case FREEBSD_PT_STEP:
SCARG(&npa, req) = PT_STEP;
SCARG(&npa, pid) = SCARG(uap, pid);
SCARG(&npa, addr) = SCARG(uap, addr);
SCARG(&npa, data) = SCARG(uap, data);
return sys_ptrace(p, &npa, retval);
#endif
case FREEBSD_PT_TRACE_ME:
case FREEBSD_PT_READ_I:
case FREEBSD_PT_READ_D:
case FREEBSD_PT_WRITE_I:
case FREEBSD_PT_WRITE_D:
case FREEBSD_PT_CONTINUE:
case FREEBSD_PT_KILL:
/* These requests are compatible with NetBSD */
return sys_ptrace(p, uap, retval);
case FREEBSD_PT_READ_U:
case FREEBSD_PT_WRITE_U:
sg = stackgap_init(p->p_emul);
nrp = stackgap_alloc(&sg, sizeof(*nrp));
SCARG(&npa, req) = PT_GETREGS;
SCARG(&npa, pid) = SCARG(uap, pid);
SCARG(&npa, addr) = (caddr_t)&nrp->regs;
if ((error = sys_ptrace(p, &npa, retval)) != 0)
return error;
#ifdef PT_GETFPREGS
SCARG(&npa, req) = PT_GETFPREGS;
SCARG(&npa, pid) = SCARG(uap, pid);
SCARG(&npa, addr) = (caddr_t)&nrp->fpregs;
if ((error = sys_ptrace(p, &npa, retval)) != 0)
return error;
#endif
netbsd_to_freebsd_ptrace_regs(&nrp->regs, &nrp->fpregs, &fr);
switch (SCARG(uap, req)) {
case FREEBSD_PT_READ_U:
return freebsd_ptrace_getregs(&fr, SCARG(uap, addr),
retval);
case FREEBSD_PT_WRITE_U:
error = freebsd_ptrace_setregs(&fr,
SCARG(uap, addr), SCARG(uap, data));
if (error)
return error;
freebsd_to_netbsd_ptrace_regs(&fr,
&nrp->regs, &nrp->fpregs);
SCARG(&npa, req) = PT_SETREGS;
SCARG(&npa, pid) = SCARG(uap, pid);
SCARG(&npa, addr) = (caddr_t)&nrp->regs;
if ((error = sys_ptrace(p, &npa, retval)) != 0)
return error;
#ifdef PT_SETFPREGS
SCARG(&npa, req) = PT_SETFPREGS;
SCARG(&npa, pid) = SCARG(uap, pid);
SCARG(&npa, addr) = (caddr_t)&nrp->fpregs;
if ((error = sys_ptrace(p, &npa, retval)) != 0)
return error;
#endif
return 0;
}
default: /* It was not a legal request. */
return (EINVAL);
}
#ifdef DIAGNOSTIC
panic("freebsd_ptrace: impossible");
#endif
}
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