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/*
* Copyright (c) 1996
* Michael Smith, All rights reserved.
* Copyright (c) 1992, 1993, 1996
* Berkeley Software Design, Inc. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Berkeley Software
* Design, Inc.
*
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``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 Berkeley Software Design, Inc. 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.
*
* from: BSDI doscmd.c,v 2.3 1996/04/08 19:32:30 bostic Exp
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdarg.h>
#include "doscmd.h"
#include "tty.h"
/* debug output goes here */
FILE *debugf;
/* see doscmd.h for flag names */
int debug_flags = D_ALWAYS;
/* include register dumps when reporting unknown interrupts */
int vflag = 0;
/* interrupts to trace */
#define BPW (sizeof(u_long) << 3)
u_long debug_ints[256/BPW];
/* Debug flag manipulation */
void
debug_set(int x)
{
x &= 0xff;
debug_ints[x/BPW] |= 1 << (x & (BPW - 1));
}
void
debug_unset(int x)
{
x &= 0xff;
debug_ints[x/BPW] &= ~(1 << (x & (BPW - 1)));
}
u_long
debug_isset(int x)
{
x &= 0xff;
return(debug_ints[x/BPW] & (1 << (x & (BPW - 1))));
}
/*
** Emit a debugging message if (flags) matches the current
** debugging mode.
*/
void
debug(int flags, const char *fmt, ...)
{
va_list args;
if (flags & (debug_flags & ~0xff)) {
if ((debug_flags & 0xff) == 0
&& (flags & (D_ITRAPS | D_TRAPS))
&& !debug_isset(flags & 0xff))
return;
va_start (args, fmt);
vfprintf (debugf, fmt, args);
va_end (args);
}
}
/*
** Emit a terminal error message and exit
*/
void
fatal(const char *fmt, ...)
{
va_list args;
dead = 1;
if (xmode) {
char buf[1024];
const char *m;
va_start (args, fmt);
vfprintf (debugf, fmt, args);
vsprintf (buf, fmt, args);
va_end (args);
tty_move(23, 0);
for (m = buf; *m; ++m)
tty_write(*m, 0x0400);
tty_move(24, 0);
for (m = "(PRESS <CTRL-ALT> ANY MOUSE BUTTON TO exit)"; *m; ++m)
tty_write(*m, 0x0900);
tty_move(-1, -1);
for (;;)
tty_pause();
}
va_start (args, fmt);
fprintf (debugf, "doscmd: fatal error ");
vfprintf (debugf, fmt, args);
va_end (args);
quit (1);
}
/*
** Emit a register dump (usually when dying)
*/
void
dump_regs(regcontext_t *REGS)
{
u_char *addr;
int i;
char buf[100];
debug (D_ALWAYS, "\n");
debug (D_ALWAYS, "ax=%04x bx=%04x cx=%04x dx=%04x\n", R_AX, R_BX, R_CX, R_DX);
debug (D_ALWAYS, "si=%04x di=%04x sp=%04x bp=%04x\n", R_SI, R_DI, R_SP, R_BP);
debug (D_ALWAYS, "cs=%04x ss=%04x ds=%04x es=%04x\n", R_CS, R_SS, R_DS, R_ES);
debug (D_ALWAYS, "ip=%x eflags=%lx\n", R_IP, R_EFLAGS);
addr = (u_char *)MAKEPTR(R_CS, R_IP);
for (i = 0; i < 16; i++)
debug (D_ALWAYS, "%02x ", addr[i]);
debug (D_ALWAYS, "\n");
addr = (char *)MAKEPTR(R_CS, R_IP);
i386dis(R_CS, R_IP, addr, buf, 0);
debug (D_ALWAYS, "%s\n", buf);
}
/*
** Unknown interrupt error messages
*/
void
unknown_int2(int maj, int min, regcontext_t *REGS)
{
if (vflag) dump_regs(REGS);
printf("Unknown interrupt %02x function %02x\n", maj, min);
R_FLAGS |= PSL_C;
}
void
unknown_int3(int maj, int min, int sub, regcontext_t *REGS)
{
if (vflag) dump_regs(REGS);
printf("Unknown interrupt %02x function %02x subfunction %02x\n",
maj, min, sub);
R_FLAGS |= PSL_C;
}
void
unknown_int4(int maj, int min, int sub, int ss, regcontext_t *REGS)
{
if (vflag) dump_regs(REGS);
printf("Unknown interrupt %02x function %02x subfunction %02x %02x\n",
maj, min, sub, ss);
R_FLAGS |= PSL_C;
}
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