Return to debug.c CVS log

Up to [local] / sys / arch / i386 / stand / libsa

Annotation of sys/arch/i386/stand/libsa/debug.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: debug.c,v 1.13 2004/03/09 19:12:12 tom Exp $  */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1997 Michael Shalayeff
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  *
        !            16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            17:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
        !            18:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            19:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            20:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            21:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            22:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            23:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            24:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            25:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            26:  * SUCH DAMAGE.
        !            27:  *
        !            28:  */
        !            29:
        !            30: #include <lib/libsa/stand.h>
        !            31: #include <debug.h>
        !            32: #include <dev/cons.h>
        !            33:
        !            34: #define        VBASE   (0xb8000)
        !            35:
        !            36: char *const reg_names[] = { REG_NAMES };
        !            37: const int nreg = NENTS(reg_names);
        !            38: struct reg reg;
        !            39: u_int32_t *const reg_values[] = { REG_VALUES(reg) };
        !            40: char *const trap_names[] = { TRAP_NAMES };
        !            41:
        !            42: void d_putc(dev_t, int);
        !            43:
        !            44: #ifdef DEBUG_DEBUG
        !            45: #define        CKPT(c) (*(u_short volatile *)(VBASE+160) = (0x1700 | (c)))
        !            46: #else
        !            47: #define        CKPT(c) /* c */
        !            48: #endif
        !            49:
        !            50: void
        !            51: debug_init(void)
        !            52: {
        !            53: }
        !            54:
        !            55:
        !            56: void
        !            57: dump_regs(u_int trapno, u_int arg)
        !            58: {
        !            59:        register int i;
        !            60:        /* make it local, so it won't rely on .data/.bss corruption */
        !            61:        struct consdev d_cons, *save_cons;
        !            62:
        !            63:        /* init cons mod */
        !            64:        save_cons = cn_tab;
        !            65:        bzero(&d_cons, sizeof(d_cons));
        !            66:        d_cons.cn_putc = &d_putc;
        !            67:        cn_tab = &d_cons;
        !            68:
        !            69:        /* Trap info */
        !            70:        printf("\ftrap: %u(%x): %s\ncn_tab=%p\n",
        !            71:            trapno, arg, trap_names[trapno], save_cons);
        !            72:
        !            73:        /* Register dump */
        !            74:        for (i = 1; i <= nreg; i++)
        !            75:                printf("%s\t%x%c", reg_names[i-1], *reg_values[i-1],
        !            76:                    ((i%4)? ' ': '\n'));
        !            77:
        !            78:        dump_mem("Code dump", (void *)*reg_values[8], 8);
        !            79:        /* %ebx (void *)((*reg_values[3] + 15) & ~0x0F) */
        !            80:        dump_mem("Memory dump", (void *)0x1a000, 48);
        !            81:        dump_mem("Stack trace", (void *)(*reg_values[4]), 48);
        !            82:
        !            83:        /* restore the console */
        !            84:        cn_tab = save_cons;
        !            85: }
        !            86:
        !            87: void
        !            88: dump_mem(char *l, void *p, size_t n)
        !            89: {
        !            90:        register int i;
        !            91:
        !            92:        printf("%s [%p]:%s", l, p, (n > 6? "\n":" "));
        !            93:        for (i = 1; i <= n; i++)
        !            94:                printf("%x%c", *(u_int32_t *)p++, ((i%8)? ' ': '\n'));
        !            95:        if (n % 8)
        !            96:                printf("\n");
        !            97: }
        !            98:
        !            99:
        !           100: u_int d_pos;
        !           101:
        !           102: void
        !           103: d_putc(dev_t d, int c)
        !           104: {
        !           105:        switch (c) {
        !           106:        case '\n':      d_pos += 80;                                    break;
        !           107:        case '\r':      d_pos -= d_pos % 80;                            break;
        !           108:        case '\b':      d_pos--;                                        break;
        !           109:        case '\f':      bzero((void *)VBASE, 80*25*2); d_pos = 0;       break;
        !           110:                /* print it */
        !           111:        default:
        !           112:                ((u_int16_t volatile *)VBASE)[d_pos++] = 0x0700 | (u_char)c;
        !           113:                break;
        !           114:        }
        !           115: }