diff options
Diffstat (limited to 'usr.bin/doscmd/debug.c')
| -rw-r--r-- | usr.bin/doscmd/debug.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/usr.bin/doscmd/debug.c b/usr.bin/doscmd/debug.c new file mode 100644 index 0000000..e736f8d --- /dev/null +++ b/usr.bin/doscmd/debug.c @@ -0,0 +1,193 @@ +/* + * 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 + * + * $Id: debug.c,v 1.5 1996/09/25 00:03:43 miff Exp $ + */ + + +#include <stdarg.h> + +#include "doscmd.h" + +/* debug output goes here */ +FILE *debugf = stderr; + +/* 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, 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 (char *fmt, ...) +{ + va_list args; + + dead = 1; + + if (xmode) { + char buf[1024]; + char buf2[1024]; + 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=%x\n", R_IP, R_EFLAGS); + + addr = (u_char *)N_GETPTR(R_CS, R_IP); + + for (i = 0; i < 16; i++) + debug (D_ALWAYS, "%02x ", addr[i]); + debug (D_ALWAYS, "\n"); + + addr = (char *)N_GETPTR(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; +} + |
