Module Name: src
Committed By: jmcneill
Date: Sat Sep 3 12:28:46 UTC 2011
Modified Files:
src/sys/arch/usermode/conf: Makefile.usermode files.usermode
std.usermode
src/sys/arch/usermode/usermode: pmap.c
Added Files:
src/sys/arch/usermode/include: urkelvisor.h
src/sys/arch/usermode/usermode: urkelvisor.c
Log Message:
Add usermode kernel supervisor, can be disabled with 'no options URKELVISOR'
To generate a diff of this commit:
cvs rdiff -u -r1.15 -r1.16 src/sys/arch/usermode/conf/Makefile.usermode
cvs rdiff -u -r1.7 -r1.8 src/sys/arch/usermode/conf/files.usermode
cvs rdiff -u -r1.5 -r1.6 src/sys/arch/usermode/conf/std.usermode
cvs rdiff -u -r0 -r1.1 src/sys/arch/usermode/include/urkelvisor.h
cvs rdiff -u -r1.50 -r1.51 src/sys/arch/usermode/usermode/pmap.c
cvs rdiff -u -r0 -r1.1 src/sys/arch/usermode/usermode/urkelvisor.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/usermode/conf/Makefile.usermode
diff -u src/sys/arch/usermode/conf/Makefile.usermode:1.15 src/sys/arch/usermode/conf/Makefile.usermode:1.16
--- src/sys/arch/usermode/conf/Makefile.usermode:1.15 Sun Aug 28 23:16:18 2011
+++ src/sys/arch/usermode/conf/Makefile.usermode Sat Sep 3 12:28:45 2011
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile.usermode,v 1.15 2011/08/28 23:16:18 jmcneill Exp $
+# $NetBSD: Makefile.usermode,v 1.16 2011/09/03 12:28:45 jmcneill Exp $
MACHINE_ARCH= usermode
USETOOLS?= no
@@ -23,6 +23,8 @@
CPPFLAGS.init_main.c+= -Dmain=kernmain
OPT_SDL= %SDL%
+OPT_URKELVISOR= %URKELVISOR%
+
.if !empty(OPT_SDL)
SDL_CFLAGS!= sdl-config --cflags
SDL_LIBS!= sdl-config --libs
@@ -31,6 +33,7 @@
CPPFLAGS.thunk.c+= ${USERMODE_CPPFLAGS}
CPPFLAGS.thunk_sdl.c+= ${SDL_CFLAGS} ${USERMODE_CPPFLAGS}
+CPPFLAGS.urkelvisor.c+= ${USERMODE_CPPFLAGS}
##
## (3) libkern and compat
@@ -43,11 +46,17 @@
##
MD_OBJS= thunk.o
MD_CFILES= ${USERMODE}/usermode/thunk.c
+MD_SFILES=
+
+.if !empty(OPT_URKELVISOR)
+MD_OBJS+= urkelvisor.o
+MD_CFILES+= ${USERMODE}/usermode/urkelvisor.c
+.endif
+
.if !empty(OPT_SDL)
MD_OBJS+= thunk_sdl.o
MD_CFILES+= ${USERMODE}/usermode/thunk_sdl.c
.endif
-MD_SFILES=
##
## (5) link settings
@@ -82,6 +91,13 @@
thunk_sdl.o: ${USERMODE}/usermode/thunk_sdl.c
${CC} ${CPPFLAGS.thunk_sdl.c} -c -o $@ ${USERMODE}/usermode/thunk_sdl.c
+urkelvisor.d: ${USERMODE}/usermode/urkelvisor.c
+ ${MKDEP} -f ${.TARGET} -- ${MKDEP_CFLAGS} \
+ ${CPPFLAGS.urkelvisor.c} ${USERMODE}/usermode/urkelvisor.c
+
+urkelvisor.o: ${USERMODE}/usermode/urkelvisor.c
+ ${CC} ${CPPFLAGS.urkelvisor.c} -c -o $@ ${USERMODE}/usermode/urkelvisor.c
+
##
## (7) misc settings
##
Index: src/sys/arch/usermode/conf/files.usermode
diff -u src/sys/arch/usermode/conf/files.usermode:1.7 src/sys/arch/usermode/conf/files.usermode:1.8
--- src/sys/arch/usermode/conf/files.usermode:1.7 Sat Aug 27 21:43:06 2011
+++ src/sys/arch/usermode/conf/files.usermode Sat Sep 3 12:28:45 2011
@@ -1,4 +1,4 @@
-# $NetBSD: files.usermode,v 1.7 2011/08/27 21:43:06 jmcneill Exp $
+# $NetBSD: files.usermode,v 1.8 2011/09/03 12:28:45 jmcneill Exp $
maxpartitions 8
maxusers 8 16 64
@@ -6,6 +6,7 @@
defparam opt_memsize.h MEMSIZE
defflag opt_sdl.h SDL
defflag opt_cpu.h CPU_DEBUG
+defflag opt_urkelvisor.h URKELVISOR
define thunkbus { }
Index: src/sys/arch/usermode/conf/std.usermode
diff -u src/sys/arch/usermode/conf/std.usermode:1.5 src/sys/arch/usermode/conf/std.usermode:1.6
--- src/sys/arch/usermode/conf/std.usermode:1.5 Mon Aug 22 15:26:55 2011
+++ src/sys/arch/usermode/conf/std.usermode Sat Sep 3 12:28:45 2011
@@ -1,4 +1,4 @@
-# $NetBSD: std.usermode,v 1.5 2011/08/22 15:26:55 reinoud Exp $
+# $NetBSD: std.usermode,v 1.6 2011/09/03 12:28:45 jmcneill Exp $
machine usermode
include "conf/std"
@@ -8,6 +8,8 @@
options EXEC_ELF64
options EXEC_SCRIPT
+options URKELVISOR
+
# Defaults
options NKMEMPAGES=2048
#options NKMEMPAGES_MAX_DEFAULT=2048
Index: src/sys/arch/usermode/usermode/pmap.c
diff -u src/sys/arch/usermode/usermode/pmap.c:1.50 src/sys/arch/usermode/usermode/pmap.c:1.51
--- src/sys/arch/usermode/usermode/pmap.c:1.50 Thu Sep 1 16:23:55 2011
+++ src/sys/arch/usermode/usermode/pmap.c Sat Sep 3 12:28:46 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.50 2011/09/01 16:23:55 reinoud Exp $ */
+/* $NetBSD: pmap.c,v 1.51 2011/09/03 12:28:46 jmcneill Exp $ */
/*-
* Copyright (c) 2011 Reinoud Zandijk <[email protected]>
@@ -27,10 +27,11 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.50 2011/09/01 16:23:55 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.51 2011/09/03 12:28:46 jmcneill Exp $");
#include "opt_memsize.h"
#include "opt_kmempages.h"
+#include "opt_urkelvisor.h"
#include <sys/types.h>
#include <sys/param.h>
@@ -40,6 +41,10 @@
#include <sys/pool.h>
#include <machine/thunk.h>
+#ifdef URKELVISOR
+#include <machine/urkelvisor.h>
+#endif
+
#include <uvm/uvm.h>
struct pv_entry {
@@ -299,6 +304,10 @@
(uint64_t) (free_end - (free_start + fpos))/1024/1024);
aprint_debug("\t%"PRIu64" MB of kmem left\n",
(uint64_t) (kmem_ext_end - kmem_ext_cur_end)/1024/1024);
+
+#ifdef URKELVISOR
+ urkelvisor_init();
+#endif
}
void
Added files:
Index: src/sys/arch/usermode/include/urkelvisor.h
diff -u /dev/null src/sys/arch/usermode/include/urkelvisor.h:1.1
--- /dev/null Sat Sep 3 12:28:46 2011
+++ src/sys/arch/usermode/include/urkelvisor.h Sat Sep 3 12:28:45 2011
@@ -0,0 +1,34 @@
+/* $NetBSD: urkelvisor.h,v 1.1 2011/09/03 12:28:45 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2011 Jared D. McNeill <[email protected]>
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef _ARCH_USERMODE_INCLUDE_URKELVISOR_H
+#define _ARCH_USERMODE_INCLUDE_URKELVISOR_H
+
+void urkelvisor_init(void);
+
+#endif /* !_ARCH_USERMODE_INCLUDE_URKELVISOR_H */
Index: src/sys/arch/usermode/usermode/urkelvisor.c
diff -u /dev/null src/sys/arch/usermode/usermode/urkelvisor.c:1.1
--- /dev/null Sat Sep 3 12:28:46 2011
+++ src/sys/arch/usermode/usermode/urkelvisor.c Sat Sep 3 12:28:46 2011
@@ -0,0 +1,163 @@
+/* $NetBSD: urkelvisor.c,v 1.1 2011/09/03 12:28:46 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2011 Jared D. McNeill <[email protected]>
+ * All rights reserved.
+ *
+ * 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.
+ */
+
+/*
+ * Usermode kernel supervisor
+ */
+
+#include <sys/cdefs.h>
+#ifdef __NetBSD__
+__RCSID("$NetBSD: urkelvisor.c,v 1.1 2011/09/03 12:28:46 jmcneill Exp $");
+#endif
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/ptrace.h>
+#include <sys/wait.h>
+#include <machine/reg.h>
+
+#include <err.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "../include/urkelvisor.h"
+
+extern vaddr_t kmem_user_start, kmem_user_end; /* usermode/pmap.c */
+
+#if defined(__i386__)
+#define R_SYSCALL(_regs) ((_regs)->r_eax)
+#define R_PC(_regs) ((_regs)->r_eip)
+#elif defined(__x86_64__)
+#define R_SYSCALL(_regs) ((_regs)->regs[_REG_RAX])
+#define R_PC(_regs) ((_regs)->regs[_REG_RIP])
+#else
+#error port me
+#endif
+
+static int
+wait_urkel(pid_t urkel_pid)
+{
+ pid_t pid;
+ int status;
+
+ pid = waitpid(urkel_pid, &status, 0);
+ if (pid == -1)
+ err(EXIT_FAILURE, "waitpid failed");
+
+ if (WIFEXITED(status))
+ exit(WEXITSTATUS(status));
+
+ return status;
+}
+
+static int
+handle_syscall(pid_t urkel_pid)
+{
+ struct reg uregs;
+ int sig = 0;
+
+ errno = 0;
+ ptrace(PT_GETREGS, urkel_pid, &uregs, 0);
+ if (errno)
+ err(EXIT_FAILURE, "ptrace(PT_GETREGS, %d, &uregs, 0) failed",
+ urkel_pid);
+
+ if (R_PC(&uregs) >= kmem_user_start && R_PC(&uregs) < kmem_user_end) {
+ fprintf(stderr, "caught syscall %d\n", R_SYSCALL(&uregs));
+ errno = 0;
+ ptrace(PT_SYSCALLEMU, urkel_pid, NULL, 0);
+ if (errno)
+ err(EXIT_FAILURE,
+ "ptrace(PT_SYSCALLEMU, %d, NULL, 0) failed",
+ urkel_pid);
+ sig = SIGILL;
+ }
+
+ return sig;
+}
+
+static int
+urkelvisor(pid_t urkel_pid)
+{
+ int status, insyscall, sig;
+
+ insyscall = 0;
+ sig = 0;
+
+ status = wait_urkel(urkel_pid);
+
+ for (;;) {
+ errno = 0;
+ //fprintf(stderr, "sig = %d\n", sig);
+ ptrace(PT_SYSCALL, urkel_pid, (void *)1, sig);
+ if (errno)
+ err(EXIT_FAILURE, "ptrace(PT_SYSCALL, %d, 1, %d) failed",
+ urkel_pid, sig);
+ sig = 0;
+ status = wait_urkel(urkel_pid);
+
+ //fprintf(stderr, "syscall insyscall=%d status=%x\n",
+ // insyscall, status);
+ if (WSTOPSIG(status) == SIGTRAP) {
+ insyscall = !insyscall;
+ if (insyscall) {
+ sig = handle_syscall(urkel_pid);
+ }
+ } else {
+ sig = WSTOPSIG(status);
+ }
+ }
+}
+
+void
+urkelvisor_init(void)
+{
+ pid_t child_pid;
+ int status;
+
+ child_pid = fork();
+ switch (child_pid) {
+ case -1:
+ err(EXIT_FAILURE, "fork() failed");
+ /* NOTREACHED */
+ case 0:
+ errno = 0;
+ ptrace(PT_TRACE_ME, 0, NULL, 0);
+ if (errno)
+ err(EXIT_FAILURE,
+ "ptrace(PT_TRACE_ME, 0, NULL, 0) failed");
+ wait(&status);
+ break;
+ default:
+ status = urkelvisor(child_pid);
+ exit(status);
+ }
+}
+
