Differential D8290 Diff 24551 usr.sbin/bhyve/consport.c

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usr.sbin/bhyve/consport.c

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*		*
* $FreeBSD$		* $FreeBSD$
*/		*/

#include <sys/cdefs.h>		#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");		__FBSDID("$FreeBSD$");

#include <sys/types.h>		#include <sys/types.h>
		#ifndef WITHOUT_CAPSICUM
		#include <sys/capsicum.h>
		#endif
#include <sys/select.h>		#include <sys/select.h>

		#include <err.h>
		#include <errno.h>
#include <stdio.h>		#include <stdio.h>
#include <stdlib.h>		#include <stdlib.h>
#include <termios.h>		#include <termios.h>
#include <unistd.h>		#include <unistd.h>
#include <stdbool.h>		#include <stdbool.h>
		#include <sysexits.h>

#include "inout.h"		#include "inout.h"
#include "pci_lpc.h"		#include "pci_lpc.h"

#define BVM_CONSOLE_PORT 0x220		#define BVM_CONSOLE_PORT 0x220
#define BVM_CONS_SIG ('b' << 8 \| 'v')		#define BVM_CONS_SIG ('b' << 8 \| 'v')

static struct termios tio_orig, tio_new;		static struct termios tio_orig, tio_new;
▲ Show 20 Lines • Show All 51 Lines • ▼ Show 20 Lines	ttywrite(unsigned char wb)
(void) write(STDOUT_FILENO, &wb, 1);		(void) write(STDOUT_FILENO, &wb, 1);
}		}

static int		static int
console_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,		console_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
uint32_t eax, void arg)		uint32_t eax, void arg)
{		{
static int opened;		static int opened;
		#ifndef WITHOUT_CAPSICUM
		cap_rights_t rights;
		u_long cmds[] = { TIOCGETA, TIOCSETA, TIOCGWINSZ };
		#endif

if (bytes == 2 && in) {		if (bytes == 2 && in) {
*eax = BVM_CONS_SIG;		*eax = BVM_CONS_SIG;
return (0);		return (0);
}		}

/*		/*
* Guests might probe this port to look for old ISA devices		* Guests might probe this port to look for old ISA devices
* using single-byte reads. Return 0xff for those.		* using single-byte reads. Return 0xff for those.
*/		*/
if (bytes == 1 && in) {		if (bytes == 1 && in) {
*eax = 0xff;		*eax = 0xff;
return (0);		return (0);
}		}

if (bytes != 4)		if (bytes != 4)
return (-1);		return (-1);

if (!opened) {		if (!opened) {
		#ifndef WITHOUT_CAPSICUM
		cap_rights_init(&rights, CAP_EVENT, CAP_IOCTL, CAP_READ, CAP_WRITE);
		if (cap_rights_limit(STDIN_FILENO, &rights) == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		if (cap_ioctls_limit(STDIN_FILENO, cmds, nitems(cmds)) == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		#endif
ttyopen();		ttyopen();
opened = 1;		opened = 1;
}		}

if (in)		if (in)
*eax = ttyread();		*eax = ttyread();
else		else
ttywrite(*eax);		ttywrite(*eax);
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