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Annotation of prex/boot/common/debug.c, Revision 1.2

1.1       nbrk        1: /*-
                      2:  * Copyright (c) 2005, Kohsuke Ohtani
                      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:  * 3. Neither the name of the author nor the names of any co-contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29:
                     30: /*
                     31:  * debug.c - loader debug functions
                     32:  */
                     33:
                     34: #include <prex/bootinfo.h>
                     35: #include <platform.h>
                     36: #include <boot.h>
                     37:
                     38: #ifdef DEBUG
                     39: /*
                     40:  * printf - print formated string
                     41:  */
                     42: void
                     43: printf(const char *fmt, ...)
                     44: {
                     45:        static const char digits[] = "0123456789abcdef";
                     46:        va_list ap;
                     47:        char buf[10];
                     48:        char *s;
                     49:        unsigned r, u;
                     50:        int c;
                     51:
                     52:        va_start(ap, fmt);
                     53:        while ((c = *fmt++)) {
                     54:                if (c == '%') {
                     55:                        c = *fmt++;
                     56:                        switch (c) {
                     57:                        case 'c':
                     58:                                putchar(va_arg(ap, int));
                     59:                                continue;
                     60:                        case 's':
                     61:                                s = va_arg(ap, char *);
                     62:                                if (s == NULL)
                     63:                                        s = "<NULL>";
                     64:                                for (; *s; s++) {
                     65:                                        putchar((int)*s);
                     66:                                }
                     67:                                continue;
                     68:                        case 'u':
                     69:                        case 'x':
                     70:                                r = c == 'u' ? 10U : 16U;
                     71:                                u = va_arg(ap, unsigned);
                     72:                                s = buf;
                     73:                                do
                     74:                                        *s++ = digits[u % r];
                     75:                                while (u /= r);
                     76:                                while (--s >= buf)
                     77:                                        putchar((int)*s);
                     78:                                continue;
                     79:                        }
                     80:                }
1.2     ! nbrk       81: #ifdef PRINTF_CRLF
        !            82:         /* add form-feed to carriage return */
        !            83:         if ((char)c == '\n') {
        !            84:             putchar('\r');
        !            85:             putchar('\f');
        !            86:                } else
        !            87: #endif /* PRINTF_CRLF */
        !            88:
1.1       nbrk       89:                putchar((int)c);
                     90:        }
                     91:        va_end(ap);
                     92: }
                     93: #endif /* DEBUG */
                     94:
                     95: /*
                     96:  * Show error and hang up.
                     97:  */
                     98: void
                     99: panic(const char *msg)
                    100: {
                    101:
                    102: #ifdef DEBUG
                    103:        printf("Panic: %s\n", msg);
                    104: #endif
                    105:        machine_panic();
                    106:        /* NOTREACHED */
                    107: }