1 /* $OpenBSD: debug.c,v 1.7 1998/06/09 13:45:07 mickey 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Michael Shalayeff. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 #include <lib/libsa/stand.h> 36 #include <debug.h> 37 #include <dev/cons.h> 38 39 #define VBASE (0xb8000) 40 41 char *const reg_names[] = { REG_NAMES }; 42 const int nreg = NENTS(reg_names); 43 struct reg reg; 44 u_int32_t *const reg_values[] = { REG_VALUES(reg) }; 45 char *const trap_names[] = { TRAP_NAMES }; 46 47 void d_putc __P((dev_t, int)); 48 49 #ifdef DEBUG_DEBUG 50 #define CKPT(c) (*(u_short volatile *)(VBASE+160) = (0x1700 | (c))) 51 #else 52 #define CKPT(c) /* c */ 53 #endif 54 55 int 56 debug_init() 57 { 58 return 0; 59 } 60 61 62 void 63 dump_regs(trapno, arg) 64 u_int trapno, arg; 65 { 66 register int i; 67 /* make it local, so it won't rely on .data/.bss corruption */ 68 struct consdev d_cons, *save_cons; 69 70 /* init cons mod */ 71 save_cons = cn_tab; 72 bzero(&d_cons, sizeof(d_cons)); 73 d_cons.cn_putc = &d_putc; 74 cn_tab = &d_cons; 75 76 /* Trap info */ 77 printf("\ftrap: %u(%x): %s\ncn_tab=%p\n", 78 trapno, arg, trap_names[trapno], save_cons); 79 80 /* Register dump */ 81 for(i = 1; i <= nreg; i++) 82 printf("%s\t%x%c", reg_names[i-1], *reg_values[i-1], 83 ((i%4)? ' ': '\n')); 84 85 dump_mem("Code dump", (void *)*reg_values[8], 8); 86 /* %ebx (void*)((*reg_values[3] + 15) & ~0x0F) */ 87 dump_mem("Memory dump", (void *)0x1a000, 48); 88 dump_mem("Stack trace", (void *)(*reg_values[4]), 48); 89 90 /* restore the console */ 91 cn_tab = save_cons; 92 } 93 94 void 95 dump_mem(l, p, n) 96 char *l; 97 void *p; 98 size_t n; 99 { 100 register int i; 101 printf("%s [%p]:%s", l, p, (n > 6? "\n":" ")); 102 for(i = 1; i <= n; i++) 103 printf("%x%c", *(u_int32_t *)p++, ((i%8)? ' ': '\n')); 104 if (n % 8) 105 printf ("\n"); 106 } 107 108 109 u_int d_pos; 110 111 void 112 d_putc(d, c) 113 dev_t d; 114 int c; 115 { 116 switch (c) { 117 case '\n': d_pos += 80; break; 118 case '\r': d_pos -= d_pos % 80; break; 119 case '\b': d_pos--; break; 120 case '\f': bzero((void *)VBASE, 80*25*2); d_pos = 0; break; 121 /* print it */ 122 default: 123 ((u_int16_t volatile *)VBASE)[d_pos++] = 0x0700 | (u_char)c; 124 break; 125 } 126 } 127