[src/trunk]: src/regress/sys/arch/i386/vm86 some basic vm86 tests, with and w...

[drochner <drochner%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/11dc5237c229
branches:  trunk
changeset: 550659:11dc5237c229
user:      drochner <drochner%NetBSD.org@localhost>
date:      Sat Aug 16 15:02:35 2003 +0000

description:
some basic vm86 tests, with and without separate signal stack

diffstat:

 regress/sys/arch/i386/vm86/Makefile     |   14 +++
 regress/sys/arch/i386/vm86/vm86test.c   |  132 ++++++++++++++++++++++++++++++++
 regress/sys/arch/i386/vm86/vm86test.exp |    9 ++
 3 files changed, 155 insertions(+), 0 deletions(-)

diffs (167 lines):

diff -r e04574259d84 -r 11dc5237c229 regress/sys/arch/i386/vm86/Makefile
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/regress/sys/arch/i386/vm86/Makefile       Sat Aug 16 15:02:35 2003 +0000
@@ -0,0 +1,14 @@
+# $NetBSD: Makefile,v 1.1 2003/08/16 15:02:35 drochner Exp $
+
+NOMAN=         # defined
+
+PROG=          vm86test
+LDADD+=                -li386
+CLEANFILES+=   vm86test.out
+
+regress:
+       ./${PROG} 2>vm86test.out
+       ./${PROG} dummyarg 2>>vm86test.out
+       tail +4 ${.CURDIR}/vm86test.exp | diff - vm86test.out
+
+.include <bsd.prog.mk>
diff -r e04574259d84 -r 11dc5237c229 regress/sys/arch/i386/vm86/vm86test.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/regress/sys/arch/i386/vm86/vm86test.c     Sat Aug 16 15:02:35 2003 +0000
@@ -0,0 +1,132 @@
+/* $NetBSD: vm86test.c,v 1.1 2003/08/16 15:02:36 drochner Exp $ */
+
+/*
+ * Copyright (c) 2003
+ *     Matthias Drochner.  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 AUTHOR 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 AUTHOR 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.
+ */
+
+#include <sys/types.h>
+#include <signal.h>
+#include <machine/segments.h>
+#include <machine/sysarch.h>
+#include <machine/vm86.h>
+#include <sys/mman.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <err.h>
+
+/*
+ * Some code to execute in vm86 mode. Uses INT 0x20 to print some status info
+ * and INT 0x21 to exit.
+ * We don't use an IDT, so the interrupts must be vectored to the user task.
+ */
+const char vmcode[] = {
+       0xcd, /* INTxx */
+       0x20,
+       0xfb, /* STI */
+       0xcd, /* INTxx */
+       0x20,
+       0xfa, /* CLI */
+       0xcd, /* INTxx */
+       0x21,
+};
+
+/*
+ * XXX before our text segment, must be below 1M to be addressable.
+ * Also chosen to start >=64k, to catch the longstanding kernel bug which
+ * caused the stack segment to be ignored in the !SA_ONSTACK case.
+ */
+#define VMCODEBASE (void *)0x80000
+#define VMSIZE 0x4000
+
+void
+urghdl(int sig, int code, struct sigcontext *sc)
+{
+       stack_t oss;
+       int res, ip = sc->sc_eip;
+
+       res = sigaltstack(0, &oss);
+       if (res < 0)
+               err(6, "sigaltstack in handler");
+       fprintf(stderr, "urghdl called @ip=%04x, code=%04x, ", ip, code);
+       fprintf(stderr, "eflags=%08x, stackflags=%01x\n",
+               sc->sc_eflags, oss.ss_flags);
+       if (code == VM86_MAKEVAL(VM86_INTx, 0x21))
+               exit (0);
+}
+
+struct vm86_struct vm; /* zero inited */
+
+int
+main(int argc, char **argv)
+{
+       void *mapaddr;
+       unsigned int codeaddr;
+       struct sigaction sa;
+       int usealtstack, res;
+       stack_t ss;
+
+       usealtstack = 0;
+       if (argc > 1)
+               usealtstack = 1;
+
+       mapaddr = mmap(VMCODEBASE, VMSIZE, PROT_READ|PROT_WRITE|PROT_EXEC,
+                      MAP_ANON|MAP_FIXED, -1, 0);
+       if (mapaddr == (void *)-1)
+               err(1, "mmap");
+
+       memcpy(mapaddr, vmcode, sizeof(vmcode));
+
+       codeaddr = (unsigned int)mapaddr;
+       vm.substr.regs.vmsc.sc_cs = codeaddr >> 4;
+       vm.substr.regs.vmsc.sc_eip = codeaddr & 15; /* unnecessary here */
+       vm.substr.ss_cpu_type = VCPU_586;
+       vm.int_byuser[4] = 0x03; /* vector INT 0x20 and 0x21 */
+
+       if (usealtstack) {
+               ss.ss_sp = malloc(SIGSTKSZ);
+               ss.ss_size = SIGSTKSZ;
+               ss.ss_flags = 0;
+               res = sigaltstack(&ss, 0);
+               if (res < 0)
+                       err (2, "sigaltstack");
+       } else {
+               vm.substr.regs.vmsc.sc_ss = codeaddr >> 4;
+               vm.substr.regs.vmsc.sc_esp = VMSIZE - (codeaddr & 15); /* hmm */
+       }
+
+       sa.sa_handler = (void(*)(int))urghdl;
+       sigemptyset(&sa.sa_mask);
+       sa.sa_flags = usealtstack ? SA_ONSTACK : 0;
+       res = sigaction(SIGURG, &sa, 0);
+       if (res < 0)
+               err(3, "sigaction");
+
+       res = i386_vm86(&vm);
+       if (res < 0)
+               err(4, "vm86");
+
+       /* NOTREACHED */
+       exit (5);
+}
diff -r e04574259d84 -r 11dc5237c229 regress/sys/arch/i386/vm86/vm86test.exp
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/regress/sys/arch/i386/vm86/vm86test.exp   Sat Aug 16 15:02:35 2003 +0000
@@ -0,0 +1,9 @@
+# $NetBSD: vm86test.exp,v 1.1 2003/08/16 15:02:36 drochner Exp $
+# real output must start in line 4
+
+urghdl called @ip=0002, code=2001, eflags=00030002, stackflags=4
+urghdl called @ip=0005, code=2001, eflags=00030202, stackflags=4
+urghdl called @ip=0008, code=2101, eflags=00030002, stackflags=4
+urghdl called @ip=0002, code=2001, eflags=00030002, stackflags=1
+urghdl called @ip=0005, code=2001, eflags=00030202, stackflags=1
+urghdl called @ip=0008, code=2101, eflags=00030002, stackflags=1