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/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 32 #include <stand.h> 33 34 #include "bootstrap.h" 35 36 /* Buffer for holding tslog data in string format. */ 37 #ifndef LOADER_TSLOGSIZE 38 #define LOADER_TSLOGSIZE (2 * 1024 * 1024) 39 #endif 40 41 int 42 tslog_init(void) 43 { 44 void * tslog_buf; 45 46 /* Allocate buffer and pass to libsa tslog code. */ 47 if ((tslog_buf = malloc(LOADER_TSLOGSIZE)) == NULL) 48 return (-1); 49 tslog_setbuf(tslog_buf, LOADER_TSLOGSIZE); 50 51 /* Record this as when we entered the loader. */ 52 TSRAW("ENTER", "loader", NULL); 53 54 return (0); 55 } 56 57 /* 58 * Pass our tslog buffer as a preloaded "module" to the kernel. This should 59 * be called as late as possible prior to the kernel being executed, since 60 * any timestamps logged after this is called will not be visible to the 61 * kernel. 62 */ 63 int 64 tslog_publish(void) 65 { 66 void * tslog_buf; 67 size_t tslog_bufpos; 68 69 /* Record a log entry for ending logging. */ 70 TSRAW("EXIT", "loader", NULL); 71 72 /* Get the buffer and its current length. */ 73 tslog_getbuf(&tslog_buf, &tslog_bufpos); 74 75 /* If we never allocated a buffer, return an error. */ 76 if (tslog_buf == NULL) 77 return (-1); 78 79 /* Store the buffer where the kernel can read it. */ 80 return (file_addbuf("TSLOG", "TSLOG data", tslog_bufpos, tslog_buf)); 81 } 82