1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
176 lines
4.0 KiB
C
176 lines
4.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#ifndef WITHOUT_CAPSICUM
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#include <sys/capsicum.h>
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#endif
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <sys/uio.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sysexits.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include "inout.h"
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#include "dbgport.h"
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#include "pci_lpc.h"
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#define BVM_DBG_PORT 0x224
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#define BVM_DBG_SIG ('B' << 8 | 'V')
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static int listen_fd, conn_fd;
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static struct sockaddr_in sin;
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static int
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dbg_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
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uint32_t *eax, void *arg)
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{
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int nwritten, nread, printonce;
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int on = 1;
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char ch;
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if (bytes == 2 && in) {
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*eax = BVM_DBG_SIG;
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return (0);
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}
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if (bytes != 4)
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return (-1);
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again:
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printonce = 0;
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while (conn_fd < 0) {
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if (!printonce) {
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printf("Waiting for connection from gdb\r\n");
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printonce = 1;
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}
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conn_fd = accept4(listen_fd, NULL, NULL, SOCK_NONBLOCK);
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if (conn_fd >= 0) {
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/* Avoid EPIPE after the client drops off. */
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(void)setsockopt(conn_fd, SOL_SOCKET, SO_NOSIGPIPE,
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&on, sizeof(on));
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/* Improve latency for one byte at a time tranfers. */
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(void)setsockopt(conn_fd, IPPROTO_TCP, TCP_NODELAY,
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&on, sizeof(on));
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} else if (errno != EINTR) {
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perror("accept");
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}
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}
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if (in) {
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nread = read(conn_fd, &ch, 1);
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if (nread == -1 && errno == EAGAIN)
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*eax = -1;
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else if (nread == 1)
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*eax = ch;
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else {
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close(conn_fd);
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conn_fd = -1;
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goto again;
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}
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} else {
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ch = *eax;
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nwritten = write(conn_fd, &ch, 1);
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if (nwritten != 1) {
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close(conn_fd);
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conn_fd = -1;
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goto again;
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}
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}
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return (0);
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}
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static struct inout_port dbgport = {
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"bvmdbg",
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BVM_DBG_PORT,
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1,
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IOPORT_F_INOUT,
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dbg_handler
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};
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SYSRES_IO(BVM_DBG_PORT, 4);
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void
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init_dbgport(int sport)
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{
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int reuse;
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#ifndef WITHOUT_CAPSICUM
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cap_rights_t rights;
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#endif
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conn_fd = -1;
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if ((listen_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
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perror("socket");
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exit(1);
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}
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = htonl(INADDR_ANY);
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sin.sin_port = htons(sport);
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reuse = 1;
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if (setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &reuse,
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sizeof(reuse)) < 0) {
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perror("setsockopt");
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exit(1);
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}
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if (bind(listen_fd, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
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perror("bind");
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exit(1);
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}
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if (listen(listen_fd, 1) < 0) {
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perror("listen");
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exit(1);
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}
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#ifndef WITHOUT_CAPSICUM
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cap_rights_init(&rights, CAP_ACCEPT, CAP_READ, CAP_WRITE);
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if (cap_rights_limit(listen_fd, &rights) == -1 && errno != ENOSYS)
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errx(EX_OSERR, "Unable to apply rights for sandbox");
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#endif
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register_inout(&dbgport);
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}
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