regress/sys/arch/i386/ioperm/ioperm.c

   1 /*      $NetBSD: ioperm.c,v 1.1 2008/01/04 14:23:00 yamt Exp $  */
   2
   3 /*-
   4  * Copyright (c)2008 YAMAMOTO Takashi,
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 #ifndef lint
  31 __RCSID("$NetBSD: ioperm.c,v 1.1 2008/01/04 14:23:00 yamt Exp $");
  32 #endif /* not lint */
  33
  34 #include <err.h>
  35 #include <signal.h>
  36 #include <setjmp.h>
  37 #include <stdbool.h>
  38 #include <stdint.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <unistd.h>
  43
  44 int i386_get_ioperm(unsigned long *);
  45 int i386_set_ioperm(unsigned long *);
  46
  47 /* arbitrary port to test */
  48 #define IO_TIMER1       0x40
  49 #define TIMER_CNTR0     0
  50 #define PORT    (IO_TIMER1+TIMER_CNTR0)
  51
  52 static uint8_t
  53 inb(uint16_t port)
  54 {
  55         uint8_t data;
  56
  57         __asm __volatile("inb %1, %0" : "=a"(data) : "id"(port));
  58         return data;
  59 }
  60
  61 sigjmp_buf env;
  62 int gotsig;
  63
  64 static void
  65 sighandler(int sig)
  66 {
  67
  68         siglongjmp(env, sig);
  69 }
  70
  71 static void
  72 try(const char *msg, bool success)
  73 {
  74         int sig;
  75
  76         sig = sigsetjmp(env, 1);
  77         if (sig == 0) {
  78                 inb(PORT);
  79                 if (!success) {
  80                         errx(EXIT_FAILURE, "%s: unexpected success of inb",
  81                             msg);
  82                 }
  83                 return;
  84         }
  85         if (success) {
  86                 errx(EXIT_FAILURE, "%s: got signal %d\n", msg, sig);
  87         }
  88 }
  89
  90 int
  91 main(int argc, char *argv[])
  92 {
  93         unsigned long buf[32];
  94         unsigned long buf2[32];
  95         int ret;
  96         int i;
  97
  98         ret = i386_get_ioperm(buf);
  99         if (ret == -1) {
 100                 err(EXIT_FAILURE, "get_ioperm 1");
 101         }
 102         for (i = 0; i < __arraycount(buf); i++) {
 103                 if (buf[i] != 0xffffffff) {
 104                         errx(EXIT_FAILURE, "buf[%d] == 0x%lx", i, buf[i]);
 105                 }
 106         }
 107
 108         signal(SIGSEGV, sighandler);
 109
 110         try("1", false);
 111         sleep(1);
 112
 113         memset(buf2, 0x00, sizeof(buf2));
 114         strcpy((char *)buf2, "foobarbaz");
 115         buf2[PORT / 8 / sizeof(unsigned long)] &=
 116             ~(1 << (PORT % (8 * sizeof(unsigned long))));
 117         ret = i386_set_ioperm(buf2);
 118         if (ret == -1) {
 119                 err(EXIT_FAILURE, "set_ioperm 1");
 120         }
 121         ret = i386_get_ioperm(buf);
 122         if (ret == -1) {
 123                 err(EXIT_FAILURE, "get_ioperm 2");
 124         }
 125         if (memcmp(buf, buf2, sizeof(buf))) {
 126                 errx(EXIT_FAILURE, "iomap mismatch");
 127         }
 128
 129         sleep(1);
 130         try("2", true);
 131         sleep(1);
 132
 133         buf2[PORT / 8 / sizeof(unsigned long)] |=
 134             (1 << (PORT % (8 * sizeof(unsigned long))));
 135         ret = i386_set_ioperm(buf2);
 136         if (ret == -1) {
 137                 err(EXIT_FAILURE, "set_ioperm 3");
 138         }
 139
 140         sleep(1);
 141         try("3", false);
 142 }