initial import of NetBSD tree

1 files changed, 158 insertions, 0 deletions

diff --git a/sys/compat/freebsd/freebsd_ptrace.c b/sys/compat/freebsd/freebsd_ptrace.c
new file mode 100644
index 00000000000..424caf59b19
--- /dev/null
+++ b/sys/compat/freebsd/freebsd_ptrace.c
@@ -0,0 +1,158 @@
+/*	$NetBSD: freebsd_ptrace.c,v 1.1 1995/10/10 01:19:34 mycroft 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. 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.
+ *
+ *	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_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));
+#ifdef PT_GETREGS
+		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;
+#endif
+#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:
+			if (error = freebsd_ptrace_setregs(&fr,
+				SCARG(uap, addr), SCARG(uap, data)))
+			    return error;
+			freebsd_to_netbsd_ptrace_regs(&fr,
+						&nrp->regs, &nrp->fpregs);
+#ifdef PT_SETREGS
+			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;
+#endif
+#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
+}