1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * PROM I/O backend
28 */
29
30 #include <sys/param.h>
31 #include <sys/types.h>
32 #include <sys/obpdefs.h>
33 #include <string.h>
34 #include <errno.h>
35 #include <ctype.h>
36
37 #include <mdb/mdb_modapi.h>
38 #include <mdb/mdb_io_impl.h>
39 #include <kmdb/kmdb_promif.h>
40 #include <kmdb/kmdb_io.h>
41 #include <mdb/mdb_debug.h>
42 #include <mdb/mdb_err.h>
43 #include <mdb/mdb.h>
44
45 #define PIO_FL_TIO_READ 0x001
46
47 typedef struct pio_data {
48 char pio_name[MAXPATHLEN];
49 ihandle_t pio_fd;
50 uint_t pio_flags;
51 struct termios pio_ti;
52 } pio_data_t;
53
54 static pid_t pio_pgrp;
55
56 static ssize_t
pio_read(mdb_io_t * io,void * buf,size_t nbytes)57 pio_read(mdb_io_t *io, void *buf, size_t nbytes)
58 {
59 pio_data_t *pdp = io->io_data;
60
61 if (io->io_next == NULL)
62 return (kmdb_prom_read(buf, nbytes, &pdp->pio_ti));
63
64 return (IOP_READ(io->io_next, buf, nbytes));
65 }
66
67 static ssize_t
pio_write(mdb_io_t * io,const void * buf,size_t nbytes)68 pio_write(mdb_io_t *io, const void *buf, size_t nbytes)
69 {
70 pio_data_t *pdp = io->io_data;
71
72 if (io->io_next == NULL)
73 return (kmdb_prom_write(buf, nbytes, &pdp->pio_ti));
74
75 return (IOP_WRITE(io->io_next, buf, nbytes));
76 }
77
78 static off64_t
pio_seek(mdb_io_t * io,off64_t offset,int whence)79 pio_seek(mdb_io_t *io, off64_t offset, int whence)
80 {
81 if (io->io_next == NULL)
82 return (set_errno(ENOTSUP));
83
84 return (IOP_SEEK(io->io_next, offset, whence));
85 }
86
87 static int
pio_ctl(mdb_io_t * io,int req,void * arg)88 pio_ctl(mdb_io_t *io, int req, void *arg)
89 {
90 pio_data_t *pdp = io->io_data;
91
92 if (io->io_next != NULL)
93 return (IOP_CTL(io->io_next, req, arg));
94
95 switch (req) {
96 case TIOCGWINSZ:
97 return (kmdb_prom_term_ctl(TIOCGWINSZ, arg));
98
99 case TCGETS: {
100 struct termios *ti = arg;
101
102 if (!(pdp->pio_flags & PIO_FL_TIO_READ)) {
103 (void) kmdb_prom_term_ctl(TCGETS, &pdp->pio_ti);
104 pdp->pio_flags |= PIO_FL_TIO_READ;
105 }
106
107 bcopy(&pdp->pio_ti, ti, sizeof (struct termios));
108
109 mdb_dprintf(MDB_DBG_CMDBUF, "pio_ctl: gets: i: 0%o o: 0%o c: "
110 "0%o l: 0%o\n", ti->c_iflag, ti->c_oflag, ti->c_cflag,
111 ti->c_lflag);
112 return (0);
113 }
114
115 case TCSETSW: {
116 struct termios *ti = arg;
117
118 mdb_dprintf(MDB_DBG_CMDBUF, "pio_ctl: setsw: i: 0%o o: 0%o c: "
119 "0%o l: 0%o\n", ti->c_iflag, ti->c_oflag, ti->c_cflag,
120 ti->c_lflag);
121
122 bcopy(ti, &pdp->pio_ti, sizeof (struct termios));
123
124 return (0);
125 }
126
127 case TIOCSPGRP:
128 pio_pgrp = *(pid_t *)arg;
129 mdb_dprintf(MDB_DBG_CMDBUF, "pio_ctl: spgrp: %ld\n",
130 (long)pio_pgrp);
131 return (0);
132
133 case TIOCGPGRP:
134 mdb_dprintf(MDB_DBG_CMDBUF, "pio_ctl: gpgrp: %ld\n",
135 (long)pio_pgrp);
136 *(pid_t *)arg = pio_pgrp;
137 return (0);
138
139 case MDB_IOC_CTTY:
140 mdb_dprintf(MDB_DBG_CMDBUF, "pio_ctl: ignoring MDB_IOC_CTTY\n");
141 return (0);
142
143 case MDB_IOC_GETFD:
144 return (set_errno(ENOTSUP));
145
146 default:
147 warn("Unknown ioctl %d\n", req);
148 return (set_errno(EINVAL));
149 }
150 }
151
152 void
pio_close(mdb_io_t * io)153 pio_close(mdb_io_t *io)
154 {
155 pio_data_t *pdp = io->io_data;
156
157 mdb_free(pdp, sizeof (pio_data_t));
158 }
159
160 static const char *
pio_name(mdb_io_t * io)161 pio_name(mdb_io_t *io)
162 {
163 pio_data_t *pdp = io->io_data;
164
165 if (io->io_next == NULL)
166 return (pdp->pio_name);
167
168 return (IOP_NAME(io->io_next));
169 }
170
171 static const mdb_io_ops_t promio_ops = {
172 .io_read = pio_read,
173 .io_write = pio_write,
174 .io_seek = pio_seek,
175 .io_ctl = pio_ctl,
176 .io_close = pio_close,
177 .io_name = pio_name,
178 .io_link = no_io_link,
179 .io_unlink = no_io_unlink,
180 .io_setattr = no_io_setattr,
181 .io_suspend = no_io_suspend,
182 .io_resume = no_io_resume,
183 };
184
185 mdb_io_t *
kmdb_promio_create(char * name)186 kmdb_promio_create(char *name)
187 {
188 mdb_io_t *io;
189 pio_data_t *pdp;
190 ihandle_t hdl = kmdb_prom_get_handle(name);
191
192 if (hdl == -1)
193 return (NULL);
194
195 io = mdb_zalloc(sizeof (mdb_io_t), UM_SLEEP);
196 pdp = mdb_zalloc(sizeof (pio_data_t), UM_SLEEP);
197
198 (void) strlcpy(pdp->pio_name, name, MAXPATHLEN);
199 pdp->pio_fd = hdl;
200
201 #ifdef __sparc
202 pdp->pio_ti.c_oflag |= ONLCR;
203 pdp->pio_ti.c_iflag |= ICRNL;
204 #endif
205 pdp->pio_ti.c_lflag |= ECHO;
206
207 io->io_data = pdp;
208 io->io_ops = &promio_ops;
209
210 return (io);
211 }
212
213 char
kmdb_getchar(void)214 kmdb_getchar(void)
215 {
216 char c;
217
218 while (IOP_READ(mdb.m_term, &c, 1) != 1)
219 continue;
220 if (isprint(c) && c != '\n')
221 mdb_iob_printf(mdb.m_out, "%c", c);
222 mdb_iob_printf(mdb.m_out, "\n");
223
224 return (c);
225 }
226