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Fixed ioperm calls in hwEnableIO

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brian 2019-05-02 16:25:50 -05:00 committed by Brian Haslett
parent bb46e78540
commit a0f738a673
1 changed files with 26 additions and 6 deletions
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32
hw/xfree86/os-support/linux/lnx_video.c
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@ -116,16 +116,36 @@ hwDisableIO(void)
static Bool
hwEnableIO(void)
{
if (ioperm(0, 1024, 1) || iopl(3)) {
ErrorF("xf86EnableIOPorts: failed to set IOPL for I/O (%s)\n",
short i;
size_t n=0;
int begin, end;
char *buf=NULL, target[4];
FILE *fp;
if (ioperm(0, 1024, 1)) {
ErrorF("xf86EnableIO: failed to enable I/O ports 0000-03ff (%s)\n",
strerror(errno));
return FALSE;
}
#if !defined(__alpha__)
/* XXX: this is actually not trapping anything because of iopl(3)
* above */
ioperm(0x40, 4, 0); /* trap access to the timer chip */
ioperm(0x60, 4, 0); /* trap access to the keyboard controller */
/* trap access to the keyboard controller(s) and timer chip(s) */
fp = fopen("/proc/ioports", "r");
while (getline(&buf, &n, fp) != -1) {
if ((strstr(buf, "keyboard") != NULL) || (strstr(buf, "timer") != NULL)) {
for (i=0; i<4; i++)
target[i] = buf[i+2];
begin = atoi(target);
for (i=0; i<4; i++)
target[i] = buf[i+7];
end = atoi(target);
ioperm(begin, end-begin+1, 0);
}
}
free(buf);
fclose(fp);
#endif
return TRUE;