143 lines
3.2 KiB
C
143 lines
3.2 KiB
C
/*-
|
|
* Copyright (c) 2011 NetApp, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* 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 NETAPP, INC ``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 NETAPP, INC 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <sys/uio.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
|
|
#include "inout.h"
|
|
#include "dbgport.h"
|
|
#include "pci_lpc.h"
|
|
|
|
#define BVM_DBG_PORT 0x224
|
|
#define BVM_DBG_SIG ('B' << 8 | 'V')
|
|
|
|
static int listen_fd, conn_fd;
|
|
|
|
static struct sockaddr_in sin;
|
|
|
|
static int
|
|
dbg_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
|
|
uint32_t *eax, void *arg)
|
|
{
|
|
char ch;
|
|
int nwritten, nread, printonce;
|
|
|
|
if (bytes == 2 && in) {
|
|
*eax = BVM_DBG_SIG;
|
|
return (0);
|
|
}
|
|
|
|
if (bytes != 4)
|
|
return (-1);
|
|
|
|
again:
|
|
printonce = 0;
|
|
while (conn_fd < 0) {
|
|
if (!printonce) {
|
|
printf("Waiting for connection from gdb\r\n");
|
|
printonce = 1;
|
|
}
|
|
conn_fd = accept(listen_fd, NULL, NULL);
|
|
if (conn_fd >= 0)
|
|
fcntl(conn_fd, F_SETFL, O_NONBLOCK);
|
|
else if (errno != EINTR)
|
|
perror("accept");
|
|
}
|
|
|
|
if (in) {
|
|
nread = read(conn_fd, &ch, 1);
|
|
if (nread == -1 && errno == EAGAIN)
|
|
*eax = -1;
|
|
else if (nread == 1)
|
|
*eax = ch;
|
|
else {
|
|
close(conn_fd);
|
|
conn_fd = -1;
|
|
goto again;
|
|
}
|
|
} else {
|
|
ch = *eax;
|
|
nwritten = write(conn_fd, &ch, 1);
|
|
if (nwritten != 1) {
|
|
close(conn_fd);
|
|
conn_fd = -1;
|
|
goto again;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static struct inout_port dbgport = {
|
|
"bvmdbg",
|
|
BVM_DBG_PORT,
|
|
1,
|
|
IOPORT_F_INOUT,
|
|
dbg_handler
|
|
};
|
|
|
|
SYSRES_IO(BVM_DBG_PORT, 4);
|
|
|
|
void
|
|
init_dbgport(int sport)
|
|
{
|
|
conn_fd = -1;
|
|
|
|
if ((listen_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
|
|
perror("socket");
|
|
exit(1);
|
|
}
|
|
|
|
sin.sin_len = sizeof(sin);
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_addr.s_addr = htonl(INADDR_ANY);
|
|
sin.sin_port = htons(sport);
|
|
|
|
if (bind(listen_fd, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
|
|
perror("bind");
|
|
exit(1);
|
|
}
|
|
|
|
if (listen(listen_fd, 1) < 0) {
|
|
perror("listen");
|
|
exit(1);
|
|
}
|
|
|
|
register_inout(&dbgport);
|
|
}
|