1 /*-
2 * Copyright (c) 2021 Colin Percival
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/types.h>
28
29 #include <stand.h>
30
31 #include "bootstrap.h"
32
33 /* Buffer for holding tslog data in string format. */
34 #ifndef LOADER_TSLOGSIZE
35 #define LOADER_TSLOGSIZE (2 * 1024 * 1024)
36 #endif
37
38 int
tslog_init(void)39 tslog_init(void)
40 {
41 void * tslog_buf;
42
43 /* Allocate buffer and pass to libsa tslog code. */
44 if ((tslog_buf = malloc(LOADER_TSLOGSIZE)) == NULL)
45 return (-1);
46 tslog_setbuf(tslog_buf, LOADER_TSLOGSIZE);
47
48 /* Record this as when we entered the loader. */
49 TSRAW("ENTER", "loader", NULL);
50
51 return (0);
52 }
53
54 /*
55 * Pass our tslog buffer as a preloaded "module" to the kernel. This should
56 * be called as late as possible prior to the kernel being executed, since
57 * any timestamps logged after this is called will not be visible to the
58 * kernel.
59 */
60 int
tslog_publish(void)61 tslog_publish(void)
62 {
63 void * tslog_buf;
64 size_t tslog_bufpos;
65
66 /* Record a log entry for ending logging. */
67 TSRAW("EXIT", "loader", NULL);
68
69 /* Get the buffer and its current length. */
70 tslog_getbuf(&tslog_buf, &tslog_bufpos);
71
72 /* If we never allocated a buffer, return an error. */
73 if (tslog_buf == NULL)
74 return (-1);
75
76 /* Store the buffer where the kernel can read it. */
77 return (file_addbuf("TSLOG", "TSLOG data", tslog_bufpos, tslog_buf));
78 }
79