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Diffstat (limited to 'tools/vmmouse_iopl.c')
| -rw-r--r-- | tools/vmmouse_iopl.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/tools/vmmouse_iopl.c b/tools/vmmouse_iopl.c new file mode 100644 index 0000000..3b3fc0b --- /dev/null +++ b/tools/vmmouse_iopl.c @@ -0,0 +1,236 @@ +/* + * Copyright 1990, 1991 by Thomas Roell, Dinkelscherben, Germany + * Copyright 1992 by David Dawes <dawes@XFree86.org> + * Copyright 1992 by Jim Tsillas <jtsilla@damon.ccs.northeastern.edu> + * Copyright 1992 by Rich Murphey <Rich@Rice.edu> + * Copyright 1992 by Robert Baron <Robert.Baron@ernst.mach.cs.cmu.edu> + * Copyright 1992 by Orest Zborowski <obz@eskimo.com> + * Copyright 1993 by Vrije Universiteit, The Netherlands + * Copyright 1993 by David Wexelblat <dwex@XFree86.org> + * Copyright 1994, 1996 by Holger Veit <Holger.Veit@gmd.de> + * Copyright 1997 by Takis Psarogiannakopoulos <takis@dpmms.cam.ac.uk> + * Copyright 1994-2003 by The XFree86 Project, Inc + * Copyright 1999 by David Holland <davidh@iquest.net> + * Copyright 2015 by VMware Inc. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the names of the above listed copyright holders + * not be used in advertising or publicity pertaining to distribution of + * the software without specific, written prior permission. The above listed + * copyright holders make no representations about the suitability of this + * software for any purpose. It is provided "as is" without express or + * implied warranty. + * + * THE ABOVE LISTED COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD + * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDERS BE + * LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY + * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER + * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#ifdef HAVE_XORG_CONFIG_H +#include <xorg-config.h> +#endif + +#include <stdbool.h> + +#if defined(VMMOUSE_OS_BSD) +#define HAVE_WRAPPER_DECLS +#include "xf86_OSlib.h" +#include "xf86OSpriv.h" +#ifdef USE_I386_IOPL +/***************************************************************************/ +/* I/O Permissions section */ +/***************************************************************************/ +static bool ExtendedEnabled = false; + +bool +xf86EnableIO() +{ + if (ExtendedEnabled) + return true; + + if (i386_iopl(1) < 0) + return false; + + ExtendedEnabled = true; + return true; +} + +void +xf86DisableIO() +{ + if (!ExtendedEnabled) + return; + + i386_iopl(0); + + ExtendedEnabled = false; + return; +} + +#endif /* USE_I386_IOPL */ + +#ifdef USE_AMD64_IOPL +/***************************************************************************/ +/* I/O Permissions section */ +/***************************************************************************/ + +static bool ExtendedEnabled = false; + +bool +xf86EnableIO() +{ + if (ExtendedEnabled) + return true; + + if (amd64_iopl(1) < 0) + return false; + + ExtendedEnabled = true; + return true; +} + +void +xf86DisableIO() +{ + if (!ExtendedEnabled) + return; + + if (amd64_iopl(0) == 0) + ExtendedEnabled = false; + + return; +} + +#endif /* USE_AMD64_IOPL */ + +#ifdef USE_DEV_IO +static int IoFd = -1; + +bool +xf86EnableIO() +{ + if (IoFd >= 0) + return true; + + if ((IoFd = open("/dev/io", O_RDWR)) == -1) + return false; + + return true; +} + +void +xf86DisableIO() +{ + if (IoFd < 0) + return; + + close(IoFd); + IoFd = -1; + return; +} +#endif + +#elif defined(VMMOUSE_OS_GENERIC) + +static bool ExtendedEnabled = false; + +extern int ioperm(unsigned long __from, unsigned long __num, int __turn_on); +extern int iopl(int __level); + +bool xf86EnableIO(void) +{ + if (ExtendedEnabled) + return true; + + if (ioperm(0, 1024, 1) || iopl(3)) + return false; + + ExtendedEnabled = true; + return true; +} + +void +xf86DisableIO(void) +{ + if (!ExtendedEnabled) + return; + + iopl(0); + ioperm(0, 1024, 0); + ExtendedEnabled = false; + + return; +} + +#elif defined(VMMOUSE_OS_SOLARIS) + +#ifdef __GNUC__ +#if defined(__sun) && !defined(sun) +#define sun 1 +#endif +#if defined(__SVR4) && !defined(SVR4) +#define SVR4 1 +#endif +#endif +/* + * The below sequence of includes is stolen from Xserver. If it doesn't work + * for your setup, please propose a patch to fix it. + */ +#include <sys/types.h> +#include <errno.h> +#if !(defined (sun) && defined (SVR4)) +#include <sys/immu.h> +#include <sys/region.h> +#include <sys/proc.h> +#endif +#include <sys/tss.h> +#include <sys/sysi86.h> +#if defined(SVR4) && !defined(sun) +#include <sys/seg.h> +#endif /* SVR4 && !sun */ +/* V86SC_IOPL was moved to <sys/sysi86.h> on Solaris 7 and later */ +#if !defined(V86SC_IOPL) /* Solaris 7 or later? */ +#include <sys/v86.h> /* Nope */ +#endif +#if defined(sun) && (defined (__i386__) || defined(__i386) || defined(__x86)) && defined (SVR4) +#include <sys/psw.h> +#endif + +static bool ExtendedEnabled = false; + +bool +xf86EnableIO(void) +{ + if (ExtendedEnabled) + return true; + + if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) < 0) + return false; + + ExtendedEnabled = true; + + return true; +} + +void +xf86DisableIO(void) +{ + if(!ExtendedEnabled) + return; + + sysi86(SI86V86, V86SC_IOPL, 0); + + ExtendedEnabled = false; +} + +#endif |