Add a test for vm86(2), simple to use and diagnose.
MFC after: 1 week Sponsored by: The FreeBSD Foundation
This commit is contained in:
kib
parent
99b8ab0632
commit
27836e8997
7
tools/test/vm86/Makefile
Normal file
7
tools/test/vm86/Makefile
Normal file
@ -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
|
||||||
|
|
||||||
122
tools/test/vm86/vm86_test.c
Normal file
122
tools/test/vm86/vm86_test.c
Normal file
@ -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@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);
|
||||||
|
}
|
||||||
42
tools/test/vm86/vm86_test_asm.s
Normal file
42
tools/test/vm86/vm86_test_asm.s
Normal file
@ -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@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:
|
||||||
Loading…
Reference in New Issue
Block a user