d4e7039177
doscmd heavily depends on struct sigcontext which luckily is mostly passed
between functions as usion regcontext_t. By redefining union regcontext_t in
terms of mcontext_t almost all bases are covered.
It also seems to me that doscmd was in a transitional state. The redundant
definitions made it difficult to get a clear overview and could easily cause
oversight. To make sure my changes were ok, I went as far as to complete the
transition. It was not exactly necessary, but I expect to have to come back
here some more ("whistle" if I'm wrong :-).
194 lines
4.7 KiB
C
194 lines
4.7 KiB
C
/*
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* Copyright (c) 1996
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* Michael Smith, All rights reserved.
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* Copyright (c) 1992, 1993, 1996
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* Berkeley Software Design, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Berkeley Software
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* Design, Inc.
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*
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* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: BSDI doscmd.c,v 2.3 1996/04/08 19:32:30 bostic Exp
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*
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* $FreeBSD$
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*/
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#include <stdarg.h>
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#include "doscmd.h"
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/* debug output goes here */
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FILE *debugf = stderr;
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/* see doscmd.h for flag names */
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int debug_flags = D_ALWAYS;
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/* include register dumps when reporting unknown interrupts */
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int vflag = 0;
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/* interrupts to trace */
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#define BPW (sizeof(u_long) << 3)
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u_long debug_ints[256/BPW];
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/* Debug flag manipulation */
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void
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debug_set(int x)
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{
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x &= 0xff;
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debug_ints[x/BPW] |= 1 << (x & (BPW - 1));
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}
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void
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debug_unset(int x)
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{
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x &= 0xff;
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debug_ints[x/BPW] &= ~(1 << (x & (BPW - 1)));
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}
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u_long
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debug_isset(int x)
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{
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x &= 0xff;
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return(debug_ints[x/BPW] & (1 << (x & (BPW - 1))));
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}
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/*
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** Emit a debugging message if (flags) matches the current
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** debugging mode.
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*/
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void
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debug (int flags, char *fmt, ...)
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{
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va_list args;
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if (flags & (debug_flags & ~0xff)) {
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if ((debug_flags & 0xff) == 0
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&& (flags & (D_ITRAPS|D_TRAPS))
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&& !debug_isset(flags & 0xff))
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return;
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va_start (args, fmt);
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vfprintf (debugf, fmt, args);
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va_end (args);
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}
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}
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/*
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** Emit a terminal error message and exit
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*/
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void
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fatal (char *fmt, ...)
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{
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va_list args;
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dead = 1;
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if (xmode) {
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char buf[1024];
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char buf2[1024];
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char *m;
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va_start (args, fmt);
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vfprintf (debugf, fmt, args);
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vsprintf (buf, fmt, args);
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va_end (args);
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tty_move(23, 0);
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for (m = buf; *m; ++m)
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tty_write(*m, 0x0400);
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tty_move(24, 0);
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for (m = "(PRESS <CTRL-ALT> ANY MOUSE BUTTON TO exit)"; *m; ++m)
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tty_write(*m, 0x0900);
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tty_move(-1, -1);
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for (;;)
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tty_pause();
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}
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va_start (args, fmt);
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fprintf (debugf, "doscmd: fatal error ");
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vfprintf (debugf, fmt, args);
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va_end (args);
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quit (1);
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}
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/*
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** Emit a register dump (usually when dying)
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*/
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void
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dump_regs(regcontext_t *REGS)
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{
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u_char *addr;
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int i;
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char buf[100];
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debug (D_ALWAYS, "\n");
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debug (D_ALWAYS, "ax=%04x bx=%04x cx=%04x dx=%04x\n", R_AX, R_BX, R_CX, R_DX);
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debug (D_ALWAYS, "si=%04x di=%04x sp=%04x bp=%04x\n", R_SI, R_DI, R_SP, R_BP);
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debug (D_ALWAYS, "cs=%04x ss=%04x ds=%04x es=%04x\n", R_CS, R_SS, R_DS, R_ES);
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debug (D_ALWAYS, "ip=%x eflags=%x\n", R_IP, R_EFLAGS);
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addr = (u_char *)MAKEPTR(R_CS, R_IP);
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for (i = 0; i < 16; i++)
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debug (D_ALWAYS, "%02x ", addr[i]);
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debug (D_ALWAYS, "\n");
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addr = (char *)MAKEPTR(R_CS, R_IP);
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i386dis(R_CS, R_IP, addr, buf, 0);
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debug (D_ALWAYS, "%s\n", buf);
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}
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/*
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** Unknown interrupt error messages
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*/
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void
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unknown_int2(int maj, int min, regcontext_t *REGS)
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{
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if (vflag) dump_regs(REGS);
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printf("Unknown interrupt %02x function %02x\n", maj, min);
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R_FLAGS |= PSL_C;
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}
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void
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unknown_int3(int maj, int min, int sub, regcontext_t *REGS)
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{
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if (vflag) dump_regs(REGS);
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printf("Unknown interrupt %02x function %02x subfunction %02x\n",
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maj, min, sub);
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R_FLAGS |= PSL_C;
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}
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void
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unknown_int4(int maj, int min, int sub, int ss, regcontext_t *REGS)
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{
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if (vflag) dump_regs(REGS);
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printf("Unknown interrupt %02x function %02x subfunction %02x %02x\n",
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maj, min, sub, ss);
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R_FLAGS |= PSL_C;
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}
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