osfmk/kern/printf.c

   1 /*
   2  * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31
  32 /*
  33  * Mach Operating System
  34  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
  35  * All Rights Reserved.
  36  *
  37  * Permission to use, copy, modify and distribute this software and its
  38  * documentation is hereby granted, provided that both the copyright
  39  * notice and this permission notice appear in all copies of the
  40  * software, derivative works or modified versions, and any portions
  41  * thereof, and that both notices appear in supporting documentation.
  42  *
  43  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  44  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  45  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  46  *
  47  * Carnegie Mellon requests users of this software to return to
  48  *
  49  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  50  *  School of Computer Science
  51  *  Carnegie Mellon University
  52  *  Pittsburgh PA 15213-3890
  53  *
  54  * any improvements or extensions that they make and grant Carnegie Mellon
  55  * the rights to redistribute these changes.
  56  */
  57
  58 /*
  59  *  Common code for printf et al.
  60  *
  61  *  The calling routine typically takes a variable number of arguments,
  62  *  and passes the address of the first one.  This implementation
  63  *  assumes a straightforward, stack implementation, aligned to the
  64  *  machine's wordsize.  Increasing addresses are assumed to point to
  65  *  successive arguments (left-to-right), as is the case for a machine
  66  *  with a downward-growing stack with arguments pushed right-to-left.
  67  *
  68  *  To write, for example, fprintf() using this routine, the code
  69  *
  70  *      fprintf(fd, format, args)
  71  *      FILE *fd;
  72  *      char *format;
  73  *      {
  74  *      _doprnt(format, &args, fd);
  75  *      }
  76  *
  77  *  would suffice.  (This example does not handle the fprintf's "return
  78  *  value" correctly, but who looks at the return value of fprintf
  79  *  anyway?)
  80  *
  81  *  This version implements the following printf features:
  82  *
  83  *      %d      decimal conversion
  84  *      %u      unsigned conversion
  85  *      %x      hexadecimal conversion
  86  *      %X      hexadecimal conversion with capital letters
  87  *      %D      hexdump, ptr & separator string ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
  88  *              if you use, "%*D" then there's a length, the data ptr and then the separator
  89  *      %o      octal conversion
  90  *      %c      character
  91  *      %s      string
  92  *      %m.n    field width, precision
  93  *      %-m.n   left adjustment
  94  *      %0m.n   zero-padding
  95  *      %*.*    width and precision taken from arguments
  96  *
  97  *  This version does not implement %f, %e, or %g.
  98  *
  99  *  As mentioned, this version does not return any reasonable value.
 100  *
 101  *  Permission is granted to use, modify, or propagate this code as
 102  *  long as this notice is incorporated.
 103  *
 104  *  Steve Summit 3/25/87
 105  *
 106  *  Tweaked for long long support and extended to support the hexdump %D
 107  *  specifier by dbg 05/02/02.
 108  */
 109
 110 /*
 111  * Added formats for decoding device registers:
 112  *
 113  * printf("reg = %b", regval, "<base><arg>*")
 114  *
 115  * where <base> is the output base expressed as a control character:
 116  * i.e. '\10' gives octal, '\20' gives hex.  Each <arg> is a sequence of
 117  * characters, the first of which gives the bit number to be inspected
 118  * (origin 1), and the rest (up to a control character (<= 32)) give the
 119  * name of the register.  Thus
 120  *      printf("reg = %b\n", 3, "\10\2BITTWO\1BITONE")
 121  * would produce
 122  *      reg = 3<BITTWO,BITONE>
 123  *
 124  * If the second character in <arg> is also a control character, it
 125  * indicates the last bit of a bit field.  In this case, printf will extract
 126  * bits <1> to <2> and print it.  Characters following the second control
 127  * character are printed before the bit field.
 128  *      printf("reg = %b\n", 0xb, "\10\4\3FIELD1=\2BITTWO\1BITONE")
 129  * would produce
 130  *      reg = b<FIELD1=2,BITONE>
 131  *
 132  * The %B format is like %b but the bits are numbered from the most
 133  * significant (the bit weighted 31), which is called 1, to the least
 134  * significant, called 32.
 135  */
 136 /*
 137  * Added for general use:
 138  *      #       prefix for alternate format:
 139  *              0x (0X) for hex
 140  *              leading 0 for octal
 141  *      +       print '+' if positive
 142  *      blank   print ' ' if positive
 143  *
 144  *      z       signed hexadecimal
 145  *      r       signed, 'radix'
 146  *      n       unsigned, 'radix'
 147  *
 148  *      D,U,O,Z same as corresponding lower-case versions
 149  *              (compatibility)
 150  */
 151 /*
 152  * Added support for print long long (64-bit) integers.
 153  * Use %lld, %Ld or %qd to print a 64-bit int.  Other
 154  * output bases such as x, X, u, U, o, and O also work.
 155  */
 156
 157 #include <debug.h>
 158 #include <mach_kdb.h>
 159 #include <mach_kdp.h>
 160 #include <platforms.h>
 161 #include <mach/boolean.h>
 162 #include <kern/cpu_number.h>
 163 #include <kern/lock.h>
 164 #include <kern/thread.h>
 165 #include <kern/sched_prim.h>
 166 #include <kern/misc_protos.h>
 167 #include <stdarg.h>
 168 #include <string.h>
 169 #include <mach_assert.h>
 170 #ifdef  MACH_BSD
 171 #include <sys/msgbuf.h>
 172 #endif
 173 #include <console/serial_protos.h>
 174
 175 #ifdef __ppc__
 176 #include <ppc/Firmware.h>
 177 #endif
 178
 179 #define isdigit(d) ((d) >= '0' && (d) <= '9')
 180 #define Ctod(c) ((c) - '0')
 181
 182 #define MAXBUF (sizeof(long long int) * 8)      /* enough for binary */
 183 static char digs[] = "0123456789abcdef";
 184
 185
 186 #if CONFIG_NO_PRINTF_STRINGS
 187 /* Prevent CPP from breaking the definition below */
 188 #undef printf
 189 #endif
 190
 191 int _consume_printf_args(int a __unused, ...)
 192 {
 193     return 0;
 194 }
 195 void _consume_kprintf_args(int a __unused, ...)
 196 {
 197 }
 198
 199 static int
 200 printnum(
 201         unsigned long long int  u,      /* number to print */
 202         int             base,
 203         void                    (*putc)(int, void *),
 204         void                    *arg)
 205 {
 206         char    buf[MAXBUF];    /* build number here */
 207         char *  p = &buf[MAXBUF-1];
 208         int nprinted = 0;
 209
 210         do {
 211             *p-- = digs[u % base];
 212             u /= base;
 213         } while (u != 0);
 214
 215         while (++p != &buf[MAXBUF]) {
 216             (*putc)(*p, arg);
 217             nprinted++;
 218         }
 219
 220         return nprinted;
 221 }
 222
 223 boolean_t       _doprnt_truncates = FALSE;
 224
 225 int
 226 __doprnt(
 227         const char      *fmt,
 228         va_list                 argp,
 229                                                 /* character output routine */
 230         void                    (*putc)(int, void *arg),
 231         void                    *arg,
 232         int                     radix)          /* default radix - for '%r' */
 233 {
 234         int             length;
 235         int             prec;
 236         boolean_t       ladjust;
 237         char            padc;
 238         long long               n;
 239         unsigned long long      u;
 240         int             plus_sign;
 241         int             sign_char;
 242         boolean_t       altfmt, truncate;
 243         int             base;
 244         char    c;
 245         int             capitals;
 246         int             long_long;
 247         int             nprinted = 0;
 248
 249         while ((c = *fmt) != '\0') {
 250             if (c != '%') {
 251                 (*putc)(c, arg);
 252                 nprinted++;
 253                 fmt++;
 254                 continue;
 255             }
 256
 257             fmt++;
 258
 259             long_long = 0;
 260             length = 0;
 261             prec = -1;
 262             ladjust = FALSE;
 263             padc = ' ';
 264             plus_sign = 0;
 265             sign_char = 0;
 266             altfmt = FALSE;
 267
 268             while (TRUE) {
 269                 c = *fmt;
 270                 if (c == '#') {
 271                     altfmt = TRUE;
 272                 }
 273                 else if (c == '-') {
 274                     ladjust = TRUE;
 275                 }
 276                 else if (c == '+') {
 277                     plus_sign = '+';
 278                 }
 279                 else if (c == ' ') {
 280                     if (plus_sign == 0)
 281                         plus_sign = ' ';
 282                 }
 283                 else
 284                     break;
 285                 fmt++;
 286             }
 287
 288             if (c == '0') {
 289                 padc = '0';
 290                 c = *++fmt;
 291             }
 292
 293             if (isdigit(c)) {
 294                 while(isdigit(c)) {
 295                     length = 10 * length + Ctod(c);
 296                     c = *++fmt;
 297                 }
 298             }
 299             else if (c == '*') {
 300                 length = va_arg(argp, int);
 301                 c = *++fmt;
 302                 if (length < 0) {
 303                     ladjust = !ladjust;
 304                     length = -length;
 305                 }
 306             }
 307
 308             if (c == '.') {
 309                 c = *++fmt;
 310                 if (isdigit(c)) {
 311                     prec = 0;
 312                     while(isdigit(c)) {
 313                         prec = 10 * prec + Ctod(c);
 314                         c = *++fmt;
 315                     }
 316                 }
 317                 else if (c == '*') {
 318                     prec = va_arg(argp, int);
 319                     c = *++fmt;
 320                 }
 321             }
 322
 323             if (c == 'l') {
 324                 c = *++fmt;     /* need it if sizeof(int) < sizeof(long) */
 325                 if (sizeof(int)<sizeof(long))
 326                     long_long = 1;
 327                 if (c == 'l') {
 328                     long_long = 1;
 329                     c = *++fmt;
 330                 }
 331             } else if (c == 'q' || c == 'L') {
 332                 long_long = 1;
 333                 c = *++fmt;
 334             }
 335
 336             truncate = FALSE;
 337             capitals=0;         /* Assume lower case printing */
 338
 339             switch(c) {
 340                 case 'b':
 341                 case 'B':
 342                 {
 343                     register char *p;
 344                     boolean_t     any;
 345                     register int  i;
 346
 347                     if (long_long) {
 348                         u = va_arg(argp, unsigned long long);
 349                     } else {
 350                         u = va_arg(argp, unsigned int);
 351                     }
 352                     p = va_arg(argp, char *);
 353                     base = *p++;
 354                     nprinted += printnum(u, base, putc, arg);
 355
 356                     if (u == 0)
 357                         break;
 358
 359                     any = FALSE;
 360                     while ((i = *p++) != '\0') {
 361                         if (*fmt == 'B')
 362                             i = 33 - i;
 363                         if (*p <= 32) {
 364                             /*
 365                              * Bit field
 366                              */
 367                             register int j;
 368                             if (any)
 369                                 (*putc)(',', arg);
 370                             else {
 371                                 (*putc)('<', arg);
 372                                 any = TRUE;
 373                             }
 374                             nprinted++;
 375                             j = *p++;
 376                             if (*fmt == 'B')
 377                                 j = 32 - j;
 378                             for (; (c = *p) > 32; p++) {
 379                                 (*putc)(c, arg);
 380                                 nprinted++;
 381                             }
 382                             nprinted += printnum((unsigned)( (u>>(j-1)) & ((2<<(i-j))-1)),
 383                                                  base, putc, arg);
 384                         }
 385                         else if (u & (1<<(i-1))) {
 386                             if (any)
 387                                 (*putc)(',', arg);
 388                             else {
 389                                 (*putc)('<', arg);
 390                                 any = TRUE;
 391                             }
 392                             nprinted++;
 393                             for (; (c = *p) > 32; p++) {
 394                                 (*putc)(c, arg);
 395                                 nprinted++;
 396                             }
 397                         }
 398                         else {
 399                             for (; *p > 32; p++)
 400                                 continue;
 401                         }
 402                     }
 403                     if (any) {
 404                         (*putc)('>', arg);
 405                         nprinted++;
 406                     }
 407                     break;
 408                 }
 409
 410                 case 'c':
 411                     c = va_arg(argp, int);
 412                     (*putc)(c, arg);
 413                     nprinted++;
 414                     break;
 415
 416                 case 's':
 417                 {
 418                     register const char *p;
 419                     register const char *p2;
 420
 421                     if (prec == -1)
 422                         prec = 0x7fffffff;      /* MAXINT */
 423
 424                     p = va_arg(argp, char *);
 425
 426                     if (p == NULL)
 427                         p = "";
 428
 429                     if (length > 0 && !ladjust) {
 430                         n = 0;
 431                         p2 = p;
 432
 433                         for (; *p != '\0' && n < prec; p++)
 434                             n++;
 435
 436                         p = p2;
 437
 438                         while (n < length) {
 439                             (*putc)(' ', arg);
 440                             n++;
 441                             nprinted++;
 442                         }
 443                     }
 444
 445                     n = 0;
 446
 447                     while ((n < prec) && (!(length > 0 && n >= length))) {
 448                             if (*p == '\0') {
 449                                     break;
 450                             }
 451                             (*putc)(*p++, arg);
 452                             nprinted++;
 453                             n++;
 454                     }
 455
 456                     if (n < length && ladjust) {
 457                         while (n < length) {
 458                             (*putc)(' ', arg);
 459                             n++;
 460                             nprinted++;
 461                         }
 462                     }
 463
 464                     break;
 465                 }
 466
 467                 case 'o':
 468                     truncate = _doprnt_truncates;
 469                 case 'O':
 470                     base = 8;
 471                     goto print_unsigned;
 472
 473                 case 'D': {
 474                     unsigned char *up;
 475                     char *q, *p;
 476
 477                         up = (unsigned char *)va_arg(argp, unsigned char *);
 478                         p = (char *)va_arg(argp, char *);
 479                         if (length == -1)
 480                                 length = 16;
 481                         while(length--) {
 482                                 (*putc)(digs[(*up >> 4)], arg);
 483                                 (*putc)(digs[(*up & 0x0f)], arg);
 484                                 nprinted += 2;
 485                                 up++;
 486                                 if (length) {
 487                                     for (q=p;*q;q++) {
 488                                                 (*putc)(*q, arg);
 489                                                 nprinted++;
 490                                     }
 491                                 }
 492                         }
 493                         break;
 494                 }
 495
 496                 case 'd':
 497                     truncate = _doprnt_truncates;
 498                     base = 10;
 499                     goto print_signed;
 500
 501                 case 'u':
 502                     truncate = _doprnt_truncates;
 503                 case 'U':
 504                     base = 10;
 505                     goto print_unsigned;
 506
 507                 case 'p':
 508                     altfmt = TRUE;
 509                     if (sizeof(int)<sizeof(void *)) {
 510                         long_long = 1;
 511                     }
 512                 case 'x':
 513                     truncate = _doprnt_truncates;
 514                     base = 16;
 515                     goto print_unsigned;
 516
 517                 case 'X':
 518                     base = 16;
 519                     capitals=16;        /* Print in upper case */
 520                     goto print_unsigned;
 521
 522                 case 'z':
 523                     truncate = _doprnt_truncates;
 524                     base = 16;
 525                     goto print_signed;
 526
 527                 case 'Z':
 528                     base = 16;
 529                     capitals=16;        /* Print in upper case */
 530                     goto print_signed;
 531
 532                 case 'r':
 533                     truncate = _doprnt_truncates;
 534                 case 'R':
 535                     base = radix;
 536                     goto print_signed;
 537
 538                 case 'n':
 539                     truncate = _doprnt_truncates;
 540                 case 'N':
 541                     base = radix;
 542                     goto print_unsigned;
 543
 544                 print_signed:
 545                     if (long_long) {
 546                         n = va_arg(argp, long long);
 547                     } else {
 548                         n = va_arg(argp, int);
 549                     }
 550                     if (n >= 0) {
 551                         u = n;
 552                         sign_char = plus_sign;
 553                     }
 554                     else {
 555                         u = -n;
 556                         sign_char = '-';
 557                     }
 558                     goto print_num;
 559
 560                 print_unsigned:
 561                     if (long_long) {
 562                         u = va_arg(argp, unsigned long long);
 563                     } else {
 564                         u = va_arg(argp, unsigned int);
 565                     }
 566                     goto print_num;
 567
 568                 print_num:
 569                 {
 570                     char        buf[MAXBUF];    /* build number here */
 571                     register char *     p = &buf[MAXBUF-1];
 572                     static char digits[] = "0123456789abcdef0123456789ABCDEF";
 573                     const char *prefix = NULL;
 574
 575                     if (truncate) u = (long long)((int)(u));
 576
 577                     if (u != 0 && altfmt) {
 578                         if (base == 8)
 579                             prefix = "0";
 580                         else if (base == 16)
 581                             prefix = "0x";
 582                     }
 583
 584                     do {
 585                         /* Print in the correct case */
 586                         *p-- = digits[(u % base)+capitals];
 587                         u /= base;
 588                     } while (u != 0);
 589
 590                     length -= (int)(&buf[MAXBUF-1] - p);
 591                     if (sign_char)
 592                         length--;
 593                     if (prefix)
 594                         length -= (int)strlen(prefix);
 595
 596                     if (padc == ' ' && !ladjust) {
 597                         /* blank padding goes before prefix */
 598                         while (--length >= 0) {
 599                             (*putc)(' ', arg);
 600                             nprinted++;
 601                         }
 602                     }
 603                     if (sign_char) {
 604                         (*putc)(sign_char, arg);
 605                         nprinted++;
 606                     }
 607                     if (prefix) {
 608                         while (*prefix) {
 609                             (*putc)(*prefix++, arg);
 610                             nprinted++;
 611                         }
 612                     }
 613                     if (padc == '0') {
 614                         /* zero padding goes after sign and prefix */
 615                         while (--length >= 0) {
 616                             (*putc)('0', arg);
 617                             nprinted++;
 618                         }
 619                     }
 620                     while (++p != &buf[MAXBUF]) {
 621                         (*putc)(*p, arg);
 622                         nprinted++;
 623                     }
 624
 625                     if (ladjust) {
 626                         while (--length >= 0) {
 627                             (*putc)(' ', arg);
 628                             nprinted++;
 629                         }
 630                     }
 631                     break;
 632                 }
 633
 634                 case '\0':
 635                     fmt--;
 636                     break;
 637
 638                 default:
 639                     (*putc)(c, arg);
 640                     nprinted++;
 641             }
 642         fmt++;
 643         }
 644
 645         return nprinted;
 646 }
 647
 648 static void
 649 dummy_putc(int ch, void *arg)
 650 {
 651     void (*real_putc)(char) = arg;
 652
 653     real_putc(ch);
 654 }
 655
 656 void
 657 _doprnt(
 658         register const char     *fmt,
 659         va_list                 *argp,
 660                                                 /* character output routine */
 661         void                    (*putc)(char),
 662         int                     radix)          /* default radix - for '%r' */
 663 {
 664     __doprnt(fmt, *argp, dummy_putc, putc, radix);
 665 }
 666
 667 #if     MP_PRINTF
 668 boolean_t       new_printf_cpu_number = FALSE;
 669 #endif  /* MP_PRINTF */
 670
 671
 672 decl_simple_lock_data(,printf_lock)
 673 decl_simple_lock_data(,bsd_log_spinlock)
 674 extern void bsd_log_init(void);
 675 void bsd_log_lock(void);
 676 void bsd_log_unlock(void);
 677
 678 void
 679 printf_init(void)
 680 {
 681         /*
 682          * Lock is only really needed after the first thread is created.
 683          */
 684         simple_lock_init(&printf_lock, 0);
 685         simple_lock_init(&bsd_log_spinlock, 0);
 686         bsd_log_init();
 687 }
 688
 689 void
 690 bsd_log_lock(void)
 691 {
 692         simple_lock(&bsd_log_spinlock);
 693 }
 694
 695 void
 696 bsd_log_unlock(void)
 697 {
 698         simple_unlock(&bsd_log_spinlock);
 699 }
 700
 701 /* derived from boot_gets */
 702 void
 703 safe_gets(
 704         char    *str,
 705         int     maxlen)
 706 {
 707         register char *lp;
 708         register int c;
 709         char *strmax = str + maxlen - 1; /* allow space for trailing 0 */
 710
 711         lp = str;
 712         for (;;) {
 713                 c = cngetc();
 714                 switch (c) {
 715                 case '\n':
 716                 case '\r':
 717                         printf("\n");
 718                         *lp++ = 0;
 719                         return;
 720
 721                 case '\b':
 722                 case '#':
 723                 case '\177':
 724                         if (lp > str) {
 725                                 printf("\b \b");
 726                                 lp--;
 727                         }
 728                         continue;
 729
 730                 case '@':
 731                 case 'u'&037:
 732                         lp = str;
 733                         printf("\n\r");
 734                         continue;
 735
 736                 default:
 737                         if (c >= ' ' && c < '\177') {
 738                                 if (lp < strmax) {
 739                                         *lp++ = c;
 740                                         printf("%c", c);
 741                                 }
 742                                 else {
 743                                         printf("%c", '\007'); /* beep */
 744                                 }
 745                         }
 746                 }
 747         }
 748 }
 749
 750 extern int disableConsoleOutput;
 751
 752 void
 753 conslog_putc(
 754         char c)
 755 {
 756         if ((debug_mode && !disable_debug_output) || !disableConsoleOutput)
 757                 cnputc(c);
 758
 759 #ifdef  MACH_BSD
 760         if (debug_mode == 0)
 761                 log_putc(c);
 762 #endif
 763 }
 764
 765 #if     MACH_KDB
 766 extern void db_putchar(char c);
 767 #endif
 768
 769 void
 770 dbugprintf(__unused const char *fmt, ...)
 771 {
 772
 773 #if     MACH_KDB
 774         va_list listp;
 775
 776         va_start(listp, fmt);
 777         _doprnt(fmt, &listp, db_putchar, 16);
 778         va_end(listp);
 779 #endif
 780         return;
 781 }
 782
 783 int
 784 printf(const char *fmt, ...)
 785 {
 786         va_list listp;
 787
 788         if (fmt) {
 789                 disable_preemption();
 790                 va_start(listp, fmt);
 791                 _doprnt(fmt, &listp, conslog_putc, 16);
 792                 va_end(listp);
 793                 enable_preemption();
 794         }
 795         return 0;
 796 }
 797
 798 void
 799 consdebug_putc(char c)
 800 {
 801         if ((debug_mode && !disable_debug_output) || !disableConsoleOutput)
 802                 cnputc(c);
 803
 804         debug_putc(c);
 805
 806         if (!console_is_serial())
 807                 if (!disable_serial_output)
 808                         PE_kputc(c);
 809 }
 810
 811 void
 812 consdebug_putc_unbuffered(char c)
 813 {
 814         if ((debug_mode && !disable_debug_output) || !disableConsoleOutput)
 815                 cnputc_unbuffered(c);
 816
 817         debug_putc(c);
 818
 819         if (!console_is_serial())
 820                 if (!disable_serial_output)
 821                         PE_kputc(c);
 822 }
 823
 824 void
 825 consdebug_log(char c)
 826 {
 827         debug_putc(c);
 828 }
 829
 830 int
 831 kdb_printf(const char *fmt, ...)
 832 {
 833         va_list listp;
 834
 835         va_start(listp, fmt);
 836         _doprnt(fmt, &listp, consdebug_putc, 16);
 837         va_end(listp);
 838         return 0;
 839 }
 840
 841 int
 842 kdb_log(const char *fmt, ...)
 843 {
 844         va_list listp;
 845
 846         va_start(listp, fmt);
 847         _doprnt(fmt, &listp, consdebug_log, 16);
 848         va_end(listp);
 849         return 0;
 850 }
 851
 852 int
 853 kdb_printf_unbuffered(const char *fmt, ...)
 854 {
 855         va_list listp;
 856
 857         va_start(listp, fmt);
 858         _doprnt(fmt, &listp, consdebug_putc_unbuffered, 16);
 859         va_end(listp);
 860         return 0;
 861 }
 862
 863 static void
 864 copybyte(int c, void *arg)
 865 {
 866         /*
 867          * arg is a pointer (outside pointer) to the pointer
 868          * (inside pointer) which points to the character.
 869          * We pass a double pointer, so that we can increment
 870          * the inside pointer.
 871          */
 872         char** p = arg; /* cast outside pointer */
 873         **p = c;        /* store character */
 874         (*p)++;         /* increment inside pointer */
 875 }
 876
 877 /*
 878  * Deprecation Warning:
 879  *      sprintf() is being deprecated. Please use snprintf() instead.
 880  */
 881 int
 882 sprintf(char *buf, const char *fmt, ...)
 883 {
 884         va_list listp;
 885         char *copybyte_str;
 886
 887         va_start(listp, fmt);
 888         copybyte_str = buf;
 889         __doprnt(fmt, listp, copybyte, &copybyte_str, 16);
 890         va_end(listp);
 891         *copybyte_str = '\0';
 892         return (int)strlen(buf);
 893 }