svn commit: r333534 - head/tools/test/vm86
Konstantin Belousov
kib at FreeBSD.org
Sat May 12 11:53:51 UTC 2018
Author: kib
Date: Sat May 12 11:53:49 2018
New Revision: 333534
URL: https://svnweb.freebsd.org/changeset/base/333534
Log:
Add a test for vm86(2), simple to use and diagnose.
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Added:
head/tools/test/vm86/
head/tools/test/vm86/Makefile (contents, props changed)
head/tools/test/vm86/vm86_test.c (contents, props changed)
head/tools/test/vm86/vm86_test_asm.s (contents, props changed)
Added: head/tools/test/vm86/Makefile
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/tools/test/vm86/Makefile Sat May 12 11:53:49 2018 (r333534)
@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+all: vm86_test
+
+vm86_test: vm86_test_asm.s vm86_test.c
+ $(CC) -Wall -Wextra -g -m32 -O -o vm86_test vm86_test_asm.s vm86_test.c
+
Added: head/tools/test/vm86/vm86_test.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/tools/test/vm86/vm86_test.c Sat May 12 11:53:49 2018 (r333534)
@@ -0,0 +1,122 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2018 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Konstantin Belousov <kib at FreeBSD.org>
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+/* $Id: vm86_test.c,v 1.10 2018/05/12 11:35:58 kostik Exp kostik $ */
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/ucontext.h>
+
+#include <machine/cpufunc.h>
+#include <machine/psl.h>
+#include <machine/sysarch.h>
+#include <machine/vm86.h>
+
+#include <err.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static u_int gs;
+
+static void
+sig_handler(int signo, siginfo_t *si __unused, void *ucp)
+{
+ ucontext_t *uc;
+ mcontext_t *mc;
+
+ uc = ucp;
+ mc = &uc->uc_mcontext;
+
+ /*
+ * Reload pointer to the TLS base, so that malloc inside
+ * printf() works.
+ */
+ load_gs(gs);
+
+ printf("sig %d %%eax %#x %%ecx %#x %%eip %#x\n", signo,
+ mc->mc_eax, mc->mc_ecx, mc->mc_eip);
+ exit(0);
+}
+
+extern char vm86_code_start[], vm86_code_end[];
+
+int
+main(void)
+{
+ ucontext_t uc;
+ struct sigaction sa;
+ struct vm86_init_args va;
+ stack_t ssa;
+ char *vm86_code;
+
+ gs = rgs();
+
+ memset(&ssa, 0, sizeof(ssa));
+ ssa.ss_size = PAGE_SIZE * 128;
+ ssa.ss_sp = mmap(NULL, ssa.ss_size, PROT_READ | PROT_WRITE |
+ PROT_EXEC, MAP_ANON, -1, 0);
+ if (ssa.ss_sp == MAP_FAILED)
+ err(1, "mmap sigstack");
+ if (sigaltstack(&ssa, NULL) == -1)
+ err(1, "sigaltstack");
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_sigaction = sig_handler;
+ sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
+ if (sigaction(SIGBUS, &sa, NULL) == -1)
+ err(1, "sigaction SIGBUS");
+ if (sigaction(SIGSEGV, &sa, NULL) == -1)
+ err(1, "sigaction SIGSEGV");
+ if (sigaction(SIGILL, &sa, NULL) == -1)
+ err(1, "sigaction SIGILL");
+
+ vm86_code = mmap((void *)0x10000, PAGE_SIZE, PROT_READ | PROT_WRITE |
+ PROT_EXEC, MAP_ANON | MAP_FIXED, -1, 0);
+ if (vm86_code == MAP_FAILED)
+ err(1, "mmap");
+ memcpy(vm86_code, vm86_code_start, vm86_code_end - vm86_code_start);
+
+ memset(&va, 0, sizeof(va));
+ if (i386_vm86(VM86_INIT, &va) == -1)
+ err(1, "VM86_INIT");
+
+ memset(&uc, 0, sizeof(uc));
+ uc.uc_mcontext.mc_ecx = 0x2345;
+ uc.uc_mcontext.mc_eflags = PSL_VM | PSL_USER;
+ uc.uc_mcontext.mc_cs = uc.uc_mcontext.mc_ds = uc.uc_mcontext.mc_es =
+ uc.uc_mcontext.mc_ss = (uintptr_t)vm86_code >> 4;
+ uc.uc_mcontext.mc_esp = 0xfffe;
+ sigreturn(&uc);
+}
Added: head/tools/test/vm86/vm86_test_asm.s
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/tools/test/vm86/vm86_test_asm.s Sat May 12 11:53:49 2018 (r333534)
@@ -0,0 +1,42 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2018 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Konstantin Belousov <kib at FreeBSD.org>
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ * $Id: vm86_test_asm.s,v 1.2 2018/05/12 11:39:00 kostik Exp kostik $
+ */
+
+ .text
+ .code16
+ .globl vm86_code_start, vm86_code_end
+vm86_code_start:
+1: inc %ax
+ loop 1b
+ ud2
+vm86_code_end:
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