2 * Copyright (c) 1986, 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
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11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
35 * $FreeBSD: src/sys/kern/subr_prf.c,v 1.61.2.5 2002/08/31 18:22:08 dwmalone Exp $
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/msgbuf.h>
44 #include <sys/malloc.h>
48 #include <sys/tprintf.h>
49 #include <sys/stdint.h>
50 #include <sys/syslog.h>
53 #include <sys/sysctl.h>
55 #include <sys/ctype.h>
56 #include <sys/eventhandler.h>
57 #include <sys/kthread.h>
58 #include <sys/cpu_topology.h>
60 #include <sys/thread2.h>
61 #include <sys/spinlock2.h>
68 * Note that stdarg.h and the ANSI style va_start macro is used for both
69 * ANSI and traditional C compilers. We use the __ machine version to stay
70 * within the kernel header file set.
72 #include <machine/stdarg.h>
79 /* Max number conversion buffer length: a u_quad_t in base 2, plus NUL byte. */
80 #define MAXNBUF (sizeof(intmax_t) * NBBY + 1)
95 struct tty *constty; /* pointer to console "window" tty */
97 static void msglogchar(int c, int pri);
98 static void msgaddchar(int c, void *dummy);
99 static void kputchar (int ch, void *arg);
100 static char *ksprintn (char *nbuf, uintmax_t num, int base, int *lenp,
102 static void snprintf_func (int ch, void *arg);
104 static int consintr = 1; /* Ok to handle console interrupts? */
105 static int msgbufmapped; /* Set when safe to use msgbuf */
106 static struct spinlock cons_spin = SPINLOCK_INITIALIZER(cons_spin, "cons_spin");
107 static thread_t constty_td = NULL;
111 static int log_console_output = 1;
112 TUNABLE_INT("kern.log_console_output", &log_console_output);
113 SYSCTL_INT(_kern, OID_AUTO, log_console_output, CTLFLAG_RW,
114 &log_console_output, 0, "");
116 static int unprivileged_read_msgbuf = 1;
117 SYSCTL_INT(_security, OID_AUTO, unprivileged_read_msgbuf, CTLFLAG_RW,
118 &unprivileged_read_msgbuf, 0,
119 "Unprivileged processes may read the kernel message buffer");
122 * Warn that a system table is full.
125 tablefull(const char *tab)
128 log(LOG_ERR, "%s: table is full\n", tab);
132 * Uprintf prints to the controlling terminal for the current process.
135 uprintf(const char *fmt, ...)
137 struct proc *p = curproc;
139 struct putchar_arg pca;
142 if (p && (p->p_flags & P_CONTROLT) && p->p_session->s_ttyvp) {
144 pca.tty = p->p_session->s_ttyp;
147 retval = kvcprintf(fmt, kputchar, &pca, 10, ap);
154 tprintf_open(struct proc *p)
156 if ((p->p_flags & P_CONTROLT) && p->p_session->s_ttyvp) {
157 sess_hold(p->p_session);
158 return ((tpr_t) p->p_session);
164 tprintf_close(tpr_t sess)
167 sess_rele((struct session *) sess);
171 * tprintf prints on the controlling terminal associated
172 * with the given session.
175 tprintf(tpr_t tpr, const char *fmt, ...)
177 struct session *sess = (struct session *)tpr;
178 struct tty *tp = NULL;
181 struct putchar_arg pca;
184 if (sess && sess->s_ttyvp && ttycheckoutq(sess->s_ttyp, 0)) {
192 retval = kvcprintf(fmt, kputchar, &pca, 10, ap);
199 * Ttyprintf displays a message on a tty; it should be used only by
200 * the tty driver, or anything that knows the underlying tty will not
201 * be revoke(2)'d away. Other callers should use tprintf.
204 ttyprintf(struct tty *tp, const char *fmt, ...)
207 struct putchar_arg pca;
213 retval = kvcprintf(fmt, kputchar, &pca, 10, ap);
219 * Log writes to the log buffer, and guarantees not to sleep (so can be
220 * called by interrupt routines). If there is no process reading the
221 * log yet, it writes to the console also.
224 log(int level, const char *fmt, ...)
228 struct putchar_arg pca;
232 pca.flags = log_open ? TOLOG : TOCONS;
235 retval = kvcprintf(fmt, kputchar, &pca, 10, ap);
242 #define CONSCHUNK 128
245 log_console(struct uio *uio)
247 int c, i, error, iovlen, nl;
249 struct iovec *miov = NULL;
253 if (!log_console_output)
256 pri = LOG_INFO | LOG_CONSOLE;
258 iovlen = uio->uio_iovcnt * sizeof (struct iovec);
259 miov = kmalloc(iovlen, M_TEMP, M_WAITOK);
260 consbuffer = kmalloc(CONSCHUNK, M_TEMP, M_WAITOK);
261 bcopy((caddr_t)muio.uio_iov, (caddr_t)miov, iovlen);
266 while (uio->uio_resid > 0) {
267 c = (int)szmin(uio->uio_resid, CONSCHUNK);
268 error = uiomove(consbuffer, (size_t)c, uio);
271 for (i = 0; i < c; i++) {
272 msglogchar(consbuffer[i], pri);
273 if (consbuffer[i] == '\n')
280 msglogchar('\n', pri);
283 kfree(consbuffer, M_TEMP);
288 * Output to the console.
291 kprintf(const char *fmt, ...)
295 struct putchar_arg pca;
298 savintr = consintr; /* disable interrupts */
302 pca.flags = TOCONS | TOLOG;
304 retval = kvcprintf(fmt, kputchar, &pca, 10, ap);
308 consintr = savintr; /* reenable interrupts */
313 kvprintf(const char *fmt, __va_list ap)
316 struct putchar_arg pca;
319 savintr = consintr; /* disable interrupts */
322 pca.flags = TOCONS | TOLOG;
324 retval = kvcprintf(fmt, kputchar, &pca, 10, ap);
327 consintr = savintr; /* reenable interrupts */
332 * Limited rate kprintf. The passed rate structure must be initialized
333 * with the desired reporting frequency. A frequency of 0 will result in
336 * count may be initialized to a negative number to allow an initial
340 krateprintf(struct krate *rate, const char *fmt, ...)
344 if (rate->ticks != (int)time_uptime) {
345 rate->ticks = (int)time_uptime;
349 if (rate->count < rate->freq) {
358 * Print a character to the dmesg log, the console, and/or the user's
361 * NOTE: TOTTY does not require nonblocking operation, but TOCONS
362 * and TOLOG do. When we have a constty we still output to
363 * the real console but we have a monitoring thread which
364 * we wakeup which tracks the log.
367 kputchar(int c, void *arg)
369 struct putchar_arg *ap = (struct putchar_arg*) arg;
370 int flags = ap->flags;
371 struct tty *tp = ap->tty;
375 if ((flags & TOCONS) && tp == NULL && constty)
376 flags |= TOLOG | TOWAKEUP;
377 if ((flags & TOTTY) && tputchar(c, tp) < 0)
380 msglogchar(c, ap->pri);
381 if ((flags & TOCONS) && c)
383 if (flags & TOWAKEUP)
388 * Scaled down version of sprintf(3).
391 ksprintf(char *buf, const char *cfmt, ...)
396 __va_start(ap, cfmt);
397 retval = kvcprintf(cfmt, NULL, buf, 10, ap);
404 * Scaled down version of vsprintf(3).
407 kvsprintf(char *buf, const char *cfmt, __va_list ap)
411 retval = kvcprintf(cfmt, NULL, buf, 10, ap);
417 * Scaled down version of snprintf(3).
420 ksnprintf(char *str, size_t size, const char *format, ...)
425 __va_start(ap, format);
426 retval = kvsnprintf(str, size, format, ap);
432 * Scaled down version of vsnprintf(3).
435 kvsnprintf(char *str, size_t size, const char *format, __va_list ap)
437 struct snprintf_arg info;
442 retval = kvcprintf(format, snprintf_func, &info, 10, ap);
443 if (info.remain >= 1)
449 ksnrprintf(char *str, size_t size, int radix, const char *format, ...)
454 __va_start(ap, format);
455 retval = kvsnrprintf(str, size, radix, format, ap);
461 kvsnrprintf(char *str, size_t size, int radix, const char *format, __va_list ap)
463 struct snprintf_arg info;
468 retval = kvcprintf(format, snprintf_func, &info, radix, ap);
469 if (info.remain >= 1)
475 kvasnrprintf(char **strp, size_t size, int radix,
476 const char *format, __va_list ap)
478 struct snprintf_arg info;
481 *strp = kmalloc(size, M_TEMP, M_WAITOK);
484 retval = kvcprintf(format, snprintf_func, &info, radix, ap);
485 if (info.remain >= 1)
491 kvasfree(char **strp)
494 kfree(*strp, M_TEMP);
500 snprintf_func(int ch, void *arg)
502 struct snprintf_arg *const info = arg;
504 if (info->remain >= 2) {
511 * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
512 * order; return an optional length and a pointer to the last character
513 * written in the buffer (i.e., the first character of the string).
514 * The buffer pointed to by `nbuf' must have length >= MAXNBUF.
517 ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
524 c = hex2ascii(num % base);
525 *++p = upper ? toupper(c) : c;
526 } while (num /= base);
533 * Scaled down version of printf(3).
535 * Two additional formats:
537 * The format %b is supported to decode error registers.
540 * kprintf("reg=%b\n", regval, "<base><arg>*");
542 * where <base> is the output base expressed as a control character, e.g.
543 * \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
544 * the first of which gives the bit number to be inspected (origin 1), and
545 * the next characters (up to a control character, i.e. a character <= 32),
546 * give the name of the register. Thus:
548 * kvcprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
550 * would produce output:
552 * reg=3<BITTWO,BITONE>
555 #define PCHAR(c) {int cc=(c); if(func) (*func)(cc,arg); else *d++=cc; retval++;}
558 kvcprintf(char const *fmt, void (*func)(int, void*), void *arg,
559 int radix, __va_list ap)
563 const char *p, *percent, *q;
566 int base, tmp, width, ladjust, sharpflag, spaceflag, neg, sign, dot;
567 int cflag, hflag, jflag, lflag, qflag, tflag, zflag;
570 int retval = 0, stop = 0;
574 * Make a supreme effort to avoid reentrant panics or deadlocks.
576 * NOTE! Do nothing that would access mycpu/gd/fs unless the
577 * function is the normal kputchar(), which allows us to
578 * use this function for very early debugging with a special
581 if (func == kputchar) {
582 if (mycpu->gd_flags & GDF_KPRINTF)
584 atomic_set_long(&mycpu->gd_flags, GDF_KPRINTF);
594 fmt = "(fmt null)\n";
596 if (radix < 2 || radix > 36)
599 usespin = (func == kputchar &&
600 panic_cpu_gd != mycpu &&
601 (((struct putchar_arg *)arg)->flags & TOTTY) == 0);
604 spin_lock(&cons_spin);
610 while ((ch = (u_char)*fmt++) != '%' || stop) {
616 dot = dwidth = ladjust = neg = sharpflag = sign = upper = 0;
618 cflag = hflag = jflag = lflag = qflag = tflag = zflag = 0;
621 switch (ch = (u_char)*fmt++) {
642 width = __va_arg(ap, int);
648 dwidth = __va_arg(ap, int);
656 case '1': case '2': case '3': case '4':
657 case '5': case '6': case '7': case '8': case '9':
658 for (n = 0;; ++fmt) {
659 n = n * 10 + ch - '0';
661 if (ch < '0' || ch > '9')
670 num = (u_int)__va_arg(ap, int);
671 p = __va_arg(ap, char *);
672 for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;)
680 if (num & (1 << (n - 1))) {
681 PCHAR(tmp ? ',' : '<');
682 for (; (n = *p) > ' '; ++p)
686 for (; *p > ' '; ++p)
693 PCHAR(__va_arg(ap, int));
719 *(__va_arg(ap, char *)) = retval;
721 *(__va_arg(ap, short *)) = retval;
723 *(__va_arg(ap, intmax_t *)) = retval;
725 *(__va_arg(ap, long *)) = retval;
727 *(__va_arg(ap, quad_t *)) = retval;
729 *(__va_arg(ap, int *)) = retval;
736 sharpflag = (width == 0);
738 num = (uintptr_t)__va_arg(ap, void *);
749 p = __va_arg(ap, char *);
755 for (n = 0; n < dwidth && p[n]; n++)
760 if (!ladjust && width > 0)
765 if (ladjust && width > 0)
787 num = (u_char)__va_arg(ap, int);
789 num = (u_short)__va_arg(ap, int);
791 num = __va_arg(ap, uintmax_t);
793 num = __va_arg(ap, u_long);
795 num = __va_arg(ap, u_quad_t);
797 num = __va_arg(ap, ptrdiff_t);
799 num = __va_arg(ap, size_t);
801 num = __va_arg(ap, u_int);
805 num = (char)__va_arg(ap, int);
807 num = (short)__va_arg(ap, int);
809 num = __va_arg(ap, intmax_t);
811 num = __va_arg(ap, long);
813 num = __va_arg(ap, quad_t);
815 num = __va_arg(ap, ptrdiff_t);
817 num = __va_arg(ap, ssize_t);
819 num = __va_arg(ap, int);
821 if (sign && (intmax_t)num < 0) {
823 num = -(intmax_t)num;
825 p = ksprintn(nbuf, num, base, &n, upper);
827 if (sharpflag && num != 0) {
833 if (neg || (sign && spaceflag))
836 if (!ladjust && padc == '0')
837 dwidth = width - tmp;
838 width -= tmp + imax(dwidth, n);
845 } else if (sign && spaceflag) {
848 if (sharpflag && num != 0) {
851 } else if (base == 16) {
868 while (percent < fmt)
871 * Since we ignore an formatting argument it is no
872 * longer safe to obey the remaining formatting
873 * arguments as the arguments will no longer match
882 * Cleanup reentrancy issues.
884 if (func == kputchar)
885 atomic_clear_long(&mycpu->gd_flags, GDF_KPRINTF);
887 spin_unlock(&cons_spin);
896 * Called from the panic code to try to get the console working
897 * again in case we paniced inside a kprintf().
902 spin_init(&cons_spin, "kvcre");
903 atomic_clear_long(&mycpu->gd_flags, GDF_KPRINTF);
907 * Console support thread for constty intercepts. This is needed because
908 * console tty intercepts can block. Instead of having kputchar() attempt
909 * to directly write to the console intercept we just force it to log
910 * and wakeup this baby to track and dump the log to constty.
921 EVENTHANDLER_REGISTER(shutdown_pre_sync, shutdown_kproc,
922 constty_td, SHUTDOWN_PRI_FIRST);
923 constty_td->td_flags |= TDF_SYSTHREAD;
926 rindex = mbp->msg_bufr; /* persistent loop variable */
927 xindex = mbp->msg_bufx - 1; /* anything different than bufx */
931 kproc_suspend_loop();
936 if (xindex == mbp->msg_bufx ||
939 tsleep(constty_td, 0, "waiting", hz*60);
946 * Get message buf FIFO indices. rindex is tracking.
948 xindex = mbp->msg_bufx;
950 if ((tp = constty) == NULL) {
956 * Check if the calculated bytes has rolled the whole
960 if (n > mbp->msg_size - 1024) {
961 rindex = xindex - mbp->msg_size + 2048;
966 * And dump it. If constty gets stuck will give up.
968 while (rindex != xindex) {
969 u_int ri = rindex % mbp->msg_size;
970 if (tputchar((uint8_t)mbp->msg_ptr[ri], tp) < 0) {
975 if (tp->t_outq.c_cc >= tp->t_ohiwat) {
976 tsleep(constty_daemon, 0, "blocked", hz / 10);
977 if (tp->t_outq.c_cc >= tp->t_ohiwat) {
987 static struct kproc_desc constty_kp = {
992 SYSINIT(bufdaemon, SI_SUB_KTHREAD_UPDATE, SI_ORDER_ANY,
993 kproc_start, &constty_kp);
996 * Put character in log buffer with a particular priority.
1001 msglogchar(int c, int pri)
1003 static int lastpri = -1;
1004 static int dangling;
1010 if (c == '\0' || c == '\r')
1012 if (pri != -1 && pri != lastpri) {
1014 msgaddchar('\n', NULL);
1017 msgaddchar('<', NULL);
1018 for (p = ksprintn(nbuf, (uintmax_t)pri, 10, NULL, 0); *p;)
1019 msgaddchar(*p--, NULL);
1020 msgaddchar('>', NULL);
1023 msgaddchar(c, NULL);
1033 * Put char in log buffer. Make sure nothing blows up beyond repair if
1034 * we have an MP race.
1039 msgaddchar(int c, void *dummy)
1050 lindex = mbp->msg_bufl;
1051 rindex = mbp->msg_bufr;
1052 xindex = mbp->msg_bufx++; /* Allow SMP race */
1055 mbp->msg_ptr[xindex % mbp->msg_size] = c;
1056 n = xindex - lindex;
1057 if (n > mbp->msg_size - 1024) {
1058 lindex = xindex - mbp->msg_size + 2048;
1060 mbp->msg_bufl = lindex;
1062 n = xindex - rindex;
1063 if (n > mbp->msg_size - 1024) {
1064 rindex = xindex - mbp->msg_size + 2048;
1066 mbp->msg_bufr = rindex;
1071 msgbufcopy(struct msgbuf *oldp)
1077 rindex = oldp->msg_bufr;
1078 xindex = oldp->msg_bufx;
1081 n = xindex - rindex;
1082 if (n > oldp->msg_size - 1024)
1083 rindex = xindex - oldp->msg_size + 2048;
1084 while (rindex != xindex) {
1085 msglogchar(oldp->msg_ptr[rindex % oldp->msg_size], -1);
1091 msgbufinit(void *ptr, size_t size)
1094 static struct msgbuf *oldp = NULL;
1096 size -= sizeof(*msgbufp);
1098 msgbufp = (struct msgbuf *) (cp + size);
1099 if (msgbufp->msg_magic != MSG_MAGIC || msgbufp->msg_size != size) {
1101 bzero(msgbufp, sizeof(*msgbufp));
1102 msgbufp->msg_magic = MSG_MAGIC;
1103 msgbufp->msg_size = (char *)msgbufp - cp;
1105 msgbufp->msg_ptr = cp;
1106 if (msgbufmapped && oldp != msgbufp)
1113 /* Sysctls for accessing/clearing the msgbuf */
1116 sysctl_kern_msgbuf(SYSCTL_HANDLER_ARGS)
1121 u_int rindex_modulo;
1122 u_int xindex_modulo;
1128 * Only wheel or root can access the message log.
1130 if (unprivileged_read_msgbuf == 0) {
1131 KKASSERT(req->td->td_proc);
1132 cred = req->td->td_proc->p_ucred;
1134 if ((cred->cr_prison || groupmember(0, cred) == 0) &&
1135 priv_check(req->td, PRIV_ROOT) != 0
1142 * Unwind the buffer, so that it's linear (possibly starting with
1143 * some initial nulls).
1145 * We don't push the entire buffer like we did before because
1146 * bufr (and bufl) now advance in chunks when the fifo is full,
1147 * rather than one character.
1150 rindex = mbp->msg_bufr;
1151 xindex = mbp->msg_bufx;
1152 n = xindex - rindex;
1153 if (n > mbp->msg_size - 1024) {
1154 rindex = xindex - mbp->msg_size + 2048;
1155 n = xindex - rindex;
1157 rindex_modulo = rindex % mbp->msg_size;
1158 xindex_modulo = xindex % mbp->msg_size;
1160 if (rindex_modulo < xindex_modulo) {
1162 * Can handle in one linear section.
1164 error = sysctl_handle_opaque(oidp,
1165 mbp->msg_ptr + rindex_modulo,
1166 xindex_modulo - rindex_modulo,
1168 } else if (rindex_modulo == xindex_modulo) {
1170 * Empty buffer, just return a single newline
1172 error = sysctl_handle_opaque(oidp, "\n", 1, req);
1173 } else if (n <= mbp->msg_size - rindex_modulo) {
1175 * Can handle in one linear section.
1177 error = sysctl_handle_opaque(oidp,
1178 mbp->msg_ptr + rindex_modulo,
1183 * Glue together two linear sections into one contiguous
1186 error = sysctl_handle_opaque(oidp,
1187 mbp->msg_ptr + rindex_modulo,
1188 mbp->msg_size - rindex_modulo,
1190 n -= mbp->msg_size - rindex_modulo;
1192 error = sysctl_handle_opaque(oidp, mbp->msg_ptr,
1200 SYSCTL_PROC(_kern, OID_AUTO, msgbuf, CTLTYPE_STRING | CTLFLAG_RD,
1201 0, 0, sysctl_kern_msgbuf, "A", "Contents of kernel message buffer");
1203 static int msgbuf_clear;
1206 sysctl_kern_msgbuf_clear(SYSCTL_HANDLER_ARGS)
1209 error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, req);
1210 if (!error && req->newptr) {
1211 /* Clear the buffer and reset write pointer */
1212 msgbufp->msg_bufr = msgbufp->msg_bufx;
1213 msgbufp->msg_bufl = msgbufp->msg_bufx;
1214 bzero(msgbufp->msg_ptr, msgbufp->msg_size);
1220 SYSCTL_PROC(_kern, OID_AUTO, msgbuf_clear,
1221 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_SECURE, &msgbuf_clear, 0,
1222 sysctl_kern_msgbuf_clear, "I", "Clear kernel message buffer");
1226 DB_SHOW_COMMAND(msgbuf, db_show_msgbuf)
1232 if (!msgbufmapped) {
1233 db_printf("msgbuf not mapped yet\n");
1236 db_printf("msgbufp = %p\n", msgbufp);
1237 db_printf("magic = %x, size = %d, r= %d, w = %d, ptr = %p\n",
1238 msgbufp->msg_magic, msgbufp->msg_size,
1239 msgbufp->msg_bufr % msgbufp->msg_size,
1240 msgbufp->msg_bufx % msgbufp->msg_size,
1243 rindex = msgbufp->msg_bufr;
1244 for (i = 0; i < msgbufp->msg_size; i++) {
1245 j = (i + rindex) % msgbufp->msg_size;
1246 db_printf("%c", msgbufp->msg_ptr[j]);
1255 hexdump(const void *ptr, int length, const char *hdr, int flags)
1259 const unsigned char *cp;
1262 if ((flags & HD_DELIM_MASK) != 0)
1263 delim = (flags & HD_DELIM_MASK) >> 8;
1267 if ((flags & HD_COLUMN_MASK) != 0)
1268 cols = flags & HD_COLUMN_MASK;
1273 for (i = 0; i < length; i+= cols) {
1277 if ((flags & HD_OMIT_COUNT) == 0)
1278 kprintf("%04x ", i);
1280 if ((flags & HD_OMIT_HEX) == 0) {
1281 for (j = 0; j < cols; j++) {
1284 kprintf("%c%02x", delim, cp[k]);
1290 if ((flags & HD_OMIT_CHARS) == 0) {
1292 for (j = 0; j < cols; j++) {
1296 else if (cp[k] >= ' ' && cp[k] <= '~')
1297 kprintf("%c", cp[k]);
1308 kprint_cpuset(cpumask_t *mask)
1316 CPUSET_FOREACH(i, *mask) {
1331 kprintf("%d-%d", b, e - 1);
1343 kprintf("%d-%d", b, e - 1);