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/* $OpenBSD: debug.c,v 1.16 2010/12/06 22:51:46 jasper Exp $ */
/*
* Copyright (c) 1997 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/param.h>
#include <lib/libsa/stand.h>
#include <debug.h>
#include <dev/cons.h>
#define VBASE (0xb8000)
char *const reg_names[] = { REG_NAMES };
const int nreg = nitems(reg_names);
struct reg reg;
u_int32_t *const reg_values[] = { REG_VALUES(reg) };
char *const trap_names[] = { TRAP_NAMES };
void d_putc(dev_t, int);
#ifdef DEBUG_DEBUG
#define CKPT(c) (*(u_short volatile *)(VBASE+160) = (0x1700 | (c)))
#else
#define CKPT(c) /* c */
#endif
void
debug_init(void)
{
}
void
dump_regs(u_int trapno, u_int arg)
{
register int i;
/* make it local, so it won't rely on .data/.bss corruption */
struct consdev d_cons, *save_cons;
/* init cons mod */
save_cons = cn_tab;
bzero(&d_cons, sizeof(d_cons));
d_cons.cn_putc = &d_putc;
cn_tab = &d_cons;
/* Trap info */
printf("\ftrap: %u(%x): %s\ncn_tab=%p\n",
trapno, arg, trap_names[trapno], save_cons);
/* Register dump */
for (i = 1; i <= nreg; i++)
printf("%s\t%x%c", reg_names[i-1], *reg_values[i-1],
((i%4)? ' ': '\n'));
dump_mem("Code dump", (void *)*reg_values[8], 8);
/* %ebx (void *)((*reg_values[3] + 15) & ~0x0F) */
dump_mem("Memory dump", (void *)0x1a000, 48);
dump_mem("Stack trace", (void *)(*reg_values[4]), 48);
/* restore the console */
cn_tab = save_cons;
}
void
dump_mem(char *l, void *p, size_t n)
{
register int i;
printf("%s [%p]:%s", l, p, (n > 6? "\n":" "));
for (i = 1; i <= n; i++)
printf("%x%c", *(u_int32_t *)p++, ((i%8)? ' ': '\n'));
if (n % 8)
printf("\n");
}
u_int d_pos;
void
d_putc(dev_t d, int c)
{
switch (c) {
case '\n': d_pos += 80; break;
case '\r': d_pos -= d_pos % 80; break;
case '\b': d_pos--; break;
case '\f': bzero((void *)VBASE, 80*25*2); d_pos = 0; break;
/* print it */
default:
((u_int16_t volatile *)VBASE)[d_pos++] = 0x0700 | (u_char)c;
break;
}
}
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