usr/src/sys/i386/include/trap.h

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * %sccs.include.noredist.c%
 *
 *      @(#)trap.h      5.1 (Berkeley) %G%
 */

/*
 * Trap type values
 * also known in trap.c for name strings
 */

#define T_RESADFLT      0       /* reserved addressing */
#define T_PRIVINFLT     1       /* privileged instruction */
#define T_RESOPFLT      2       /* reserved operand */
#define T_BPTFLT        3       /* breakpoint instruction */
#define T_SYSCALL       5       /* system call (kcall) */
#define T_ARITHTRAP     6       /* arithmetic trap */
#define T_ASTFLT        7       /* system forced exception */
#define T_SEGFLT        8       /* segmentation (limit) fault */
#define T_PROTFLT       9       /* protection fault */
#define T_TRCTRAP       10      /* trace trap */
#define T_PAGEFLT       12      /* page fault */
#define T_TABLEFLT      13      /* page table fault */
#define T_ALIGNFLT      14      /* alignment fault */
#define T_KSPNOTVAL     15      /* kernel stack pointer not valid */
#define T_BUSERR        16      /* bus error */
#define T_KDBTRAP       17      /* kernel debugger trap */

#define T_DIVIDE        18      /* integer divide fault */
#define T_DEBUG         19      /* debug fault/trap catchall */
#define T_NMI           20      /* non-maskable trap */
#define T_OFLOW         21      /* overflow trap */
#define T_BOUND         22      /* bound instruction fault */
#define T_DNA           23      /* device not available fault */
#define T_DOUBLEFLT     24      /* double fault */
#define T_FPOPFLT       25      /* fp coprocessor operand fetch fault */
#define T_TSSFLT        26      /* invalid tss fault */
#define T_SEGNPFLT      27      /* segment not present fault */
#define T_STKFLT        28      /* stack fault */
#define T_RESERVED      29      /* stack fault */

/* definitions for <sys/signal.h> */
#define     ILL_RESAD_FAULT     T_RESADFLT
#define     ILL_PRIVIN_FAULT    T_PRIVINFLT
#define     ILL_RESOP_FAULT     T_RESOPFLT
#define     ILL_ALIGN_FAULT     T_ALIGNFLT

/* codes for SIGFPE/ARITHTRAP */
#define     FPE_INTOVF_TRAP     0x1     /* integer overflow */
#define     FPE_INTDIV_TRAP     0x2     /* integer divide by zero */
#define     FPE_FLTDIV_TRAP     0x3     /* floating/decimal divide by zero */
#define     FPE_FLTOVF_TRAP     0x4     /* floating overflow */
#define     FPE_FLTUND_TRAP     0x5     /* floating underflow */