Annotation of sys/arch/i386/stand/libsa/debug.c, Revision 1.1.1.1
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: }
CVSweb