1 /* $NetBSD: trap.h,v 1.25 2023/03/26 12:23:42 ragge Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)trap.h 5.4 (Berkeley) 5/9/91 35 */ 36 37 /* 38 * Trap type values 39 * also known in trap.c for name strings 40 */ 41 #ifndef _VAX_TRAP_H_ 42 #define _VAX_TRAP_H_ 43 44 #define T_RESADFLT 0 /* reserved addressing */ 45 #define T_PRIVINFLT 1 /* privileged instruction */ 46 #define T_RESOPFLT 2 /* reserved operand */ 47 #define T_BPTFLT 3 /* breakpoint instruction */ 48 #define T_XFCFLT 4 /* Customer reserved instruction */ 49 #define T_SYSCALL 5 /* system call (kcall) */ 50 #define T_ARITHFLT 6 /* arithmetic trap */ 51 #define T_ASTFLT 7 /* system forced exception */ 52 #define T_PTELEN 8 /* Page table length exceeded */ 53 #define T_TRANSFLT 9 /* translation fault */ 54 #define T_TRCTRAP 10 /* trace trap */ 55 #define T_COMPAT 11 /* compatibility mode fault on VAX */ 56 #define T_ACCFLT 12 /* Access violation fault */ 57 #define T_KSPNOTVAL 15 /* kernel stack pointer not valid */ 58 #define T_KDBTRAP 17 /* kernel debugger trap */ 59 60 /* These gets ORed with the word for page handling routines */ 61 #define T_WRITE 0x80 62 #define T_PTEFETCH 0x40 63 64 /* Section 6.4.1 Arithmetic Traps/Faults */ 65 #define ATRP_INTOVF 0x1 /* integer overflow */ 66 #define ATRP_INTDIV 0x2 /* integer divide by zero */ 67 #define ATRP_FLTOVF 0x3 /* floating overflow */ 68 #define ATRP_FLTDIV 0x4 /* floating/decimal divide by zero */ 69 #define ATRP_FLTUND 0x5 /* floating underflow */ 70 #define ATRP_DECOVF 0x6 /* decimal underflow */ 71 #define ATRP_FLTSUB 0x7 /* subscript range */ 72 #define AFLT_FLTOVF 0x8 /* floating overflow */ 73 #define AFLT_FLTDIV 0x9 /* floating divide-by-zero */ 74 #define AFLT_FLTUND 0xa /* floating underflow */ 75 76 /* Used by RAS to detect an interrupted CAS */ 77 #define CASMAGIC 0xFEDABABE /* always invalid space */ 78 79 /* Trap's coming from user mode */ 80 #define T_USER 0x100 81 82 #ifndef _LOCORE 83 struct trapframe { 84 long tf_fp; /* Stack frame pointer */ 85 long tf_ap; /* Argument pointer on user stack */ 86 long tf_sp; /* Stack pointer */ 87 long tf_r0; /* General registers saved upon trap/syscall */ 88 long tf_r1; 89 long tf_r2; 90 long tf_r3; 91 long tf_r4; 92 long tf_r5; 93 long tf_r6; 94 long tf_r7; 95 long tf_r8; 96 long tf_r9; 97 long tf_r10; 98 long tf_r11; 99 long tf_trap; /* Type of trap */ 100 long tf_code; /* Trap specific code */ 101 long tf_pc; /* User pc */ 102 long tf_psl; /* User psl */ 103 }; 104 105 #endif /* _LOCORE */ 106 107 #endif /* _VAX_TRAP_H_ */ 108