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      5.2 (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_NMI           19      /* non-maskable trap */
#define T_OFLOW         20      /* overflow trap */
#define T_BOUND         21      /* bound instruction fault */
#define T_DNA           22      /* device not available fault */
#define T_DOUBLEFLT     23      /* double fault */
#define T_FPOPFLT       24      /* fp coprocessor operand fetch fault */
#define T_TSSFLT        25      /* invalid tss fault */
#define T_SEGNPFLT      26      /* segment not present fault */
#define T_STKFLT        27      /* stack fault */
#define T_RESERVED      28      /* reserved fault base */

/* 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
#define     ILL_FPOP_FAULT      T_FPOPFLT       /* coprocessor operand fault */

/* 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 */
#define     FPE_FPU_NP_TRAP     0x6     /* floating point unit not present */
#define     FPE_SUBRNG_TRAP     0x7     /* subrange out of bounds */

/* codes for SIGBUS */
#define     BUS_PAGE_FAULT      T_PAGEFLT       /* page fault protection base */
#define     BUS_SEGNP_FAULT     T_SEGNPFLT      /* segment not present */
#define     BUS_STK_FAULT       T_STKFLT        /* stack segment */
#define     BUS_SEGM_FAULT      T_RESERVED      /* segment protection base */