119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*-
|
|
* Copyright (c) 2021 Colin Percival
|
|
* 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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/types.h>
|
|
|
|
#if defined(__amd64__) || defined(__i386__)
|
|
#include <machine/cpufunc.h>
|
|
#elif defined(__aarch64__)
|
|
#include <machine/armreg.h>
|
|
#endif
|
|
|
|
#include <stand.h>
|
|
|
|
/* Buffer for holding tslog data in string format. */
|
|
static char * tslog_buf = NULL;
|
|
static size_t tslog_buflen = 0;
|
|
static size_t tslog_bufpos = 0;
|
|
|
|
static size_t
|
|
tsccat(char * buf, uint64_t tsc)
|
|
{
|
|
size_t len;
|
|
|
|
/* Handle upper digits. */
|
|
if (tsc >= 10)
|
|
len = tsccat(buf, tsc / 10);
|
|
else
|
|
len = 0;
|
|
|
|
/* Write the last digit. */
|
|
buf[len] = "0123456789"[tsc % 10];
|
|
|
|
/* Return the length written. */
|
|
return (len + 1);
|
|
}
|
|
|
|
void
|
|
tslog_setbuf(void * buf, size_t len)
|
|
{
|
|
|
|
tslog_buf = (char *)buf;
|
|
tslog_buflen = len;
|
|
tslog_bufpos = 0;
|
|
}
|
|
|
|
void
|
|
tslog_getbuf(void ** buf, size_t * len)
|
|
{
|
|
|
|
*buf = (void *)tslog_buf;
|
|
*len = tslog_bufpos;
|
|
}
|
|
|
|
void
|
|
tslog(const char * type, const char * f, const char * s)
|
|
{
|
|
#if defined(__amd64__) || defined(__i386__)
|
|
uint64_t tsc = rdtsc();
|
|
#elif defined(__aarch64__)
|
|
uint64_t tsc = READ_SPECIALREG(cntvct_el0);
|
|
#else
|
|
uint64_t tsc = 0;
|
|
#endif
|
|
|
|
/* If we have no buffer, do nothing. */
|
|
if (tslog_buf == NULL)
|
|
return;
|
|
|
|
/* Check that we have enough space. */
|
|
if (tslog_buflen - tslog_bufpos < 32 + strlen(type) + strlen(f) +
|
|
(s ? strlen(s) : 0))
|
|
return;
|
|
|
|
/* Append to existing buffer. */
|
|
strcpy(&tslog_buf[tslog_bufpos], "0x0 ");
|
|
tslog_bufpos += 4;
|
|
tslog_bufpos += tsccat(&tslog_buf[tslog_bufpos], tsc);
|
|
strcpy(&tslog_buf[tslog_bufpos], " ");
|
|
tslog_bufpos += 1;
|
|
strcpy(&tslog_buf[tslog_bufpos], type);
|
|
tslog_bufpos += strlen(type);
|
|
strcpy(&tslog_buf[tslog_bufpos], " ");
|
|
tslog_bufpos += 1;
|
|
strcpy(&tslog_buf[tslog_bufpos], f);
|
|
tslog_bufpos += strlen(f);
|
|
if (s != NULL) {
|
|
strcpy(&tslog_buf[tslog_bufpos], " ");
|
|
tslog_bufpos += 1;
|
|
strcpy(&tslog_buf[tslog_bufpos], s);
|
|
tslog_bufpos += strlen(s);
|
|
}
|
|
strcpy(&tslog_buf[tslog_bufpos], "\n");
|
|
tslog_bufpos += 1;
|
|
}
|