1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1999 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 /* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */ 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */ 28 /* All Rights Reserved */ 29 30 #ifndef _SYS_DEBUGREG_H 31 #define _SYS_DEBUGREG_H 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 /* 38 * Specify masks for accessing the i386 debug registers. 39 */ 40 41 /* 42 * The debug registers are found in an array (debugreg) in the u block. 43 * On the i386, there are 4 registers to specify linear addresses. 44 * dr4 and dr5 are reserved. 45 */ 46 #define DR_FIRSTADDR 0 /* u.u_debugreg[DR_FIRSTADDR] */ 47 #define DR_LASTADDR 3 /* u.u_debugreg[DR_LASTADDR] */ 48 49 /* 50 * The debug status is found in dr6 after a debug trap. 51 */ 52 #define DR_STATUS 6 /* u.u_debugreg[DR_STATUS] */ 53 #define DR_TRAP0 0x1 /* Trap from debug register #0 */ 54 #define DR_TRAP1 0x2 /* Trap from debug register #1 */ 55 #define DR_TRAP2 0x4 /* Trap from debug register #2 */ 56 #define DR_TRAP3 0x8 /* Trap from debug register #3 */ 57 #define DR_ICEALSO 0x2000 /* Flag bit reserved for in-circuit-emulator */ 58 #define DR_SINGLESTEP 0x4000 /* Trap resulting from the single-step flag */ 59 #define DR_TASKSWITCH 0x8000 /* Trap resulting from a task-switch */ 60 61 /* 62 * dr7 controls the rest of the debug registers. 63 * use shifts and masks because arrays of fields tend to get aligned. 64 * For example, 65 * dr7 & DR_LOCAL_ENABLE_MASK 66 * dr7 >> (DR_LOCAL_ENABLE_SHIFT + r# * DR_ENABLE_SIZE) & 0x1 67 * dr7 >> (DR_CONTROL_SHIFT + r# * DR_CONTROL_SIZE) & DR_RW_MASK 68 * Note that the GLOBAL bits below and always turned off by the kernel. 69 */ 70 #define DR_CONTROL 7 /* u.u_debugreg[DR_CONTROL] */ 71 #define DR_LOCAL_ENABLE_MASK 0x55 /* Enable all 4 regs for ldt addrs */ 72 #define DR_GLOBAL_ENABLE_MASK 0xAA /* Enable all 4 regs for gdt addrs */ 73 #define DR_CONTROL_RESERVED 0xFC00 /* Bits reserved by Intel */ 74 #define DR_LOCAL_SLOWDOWN 0x100 /* Slow the pipeline for ldt addrs */ 75 #define DR_GLOBAL_SLOWDOWN 0x200 /* Slow the pipeline for gdt addrs */ 76 77 #define DR_LOCAL_ENABLE_SHIFT 0 /* Additional shift: local enable */ 78 #define DR_GLOBAL_ENABLE_SHIFT 1 /* Additional shift: global enable */ 79 #define DR_ENABLE_SIZE 2 /* 2 enable bits per register */ 80 81 #define DR_TRAPS (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3) 82 #define DR_ENABLE0 0x03 /* Local or Global enable of trap 0 */ 83 #define DR_ENABLE1 0x0C /* Local or Global enable of trap 1 */ 84 #define DR_ENABLE2 0x30 /* Local or Global enable of trap 2 */ 85 #define DR_ENABLE3 0xC0 /* Local or Global enable of trap 3 */ 86 87 #define DR_CONTROL_SHIFT 16 /* Shift to register control bits */ 88 #define DR_CONTROL_SIZE 4 /* 4 control bits per register */ 89 #define DR_RW_MASK 0x3 /* Two bits specify r/w access */ 90 #define DR_RW_EXECUTE 0x0 /* Settings for the read/write mask */ 91 #define DR_RW_WRITE 0x1 92 #define DR_RW_IO_RW 0x2 /* I/O space on Pentium and beyond */ 93 #define DR_RW_READ 0x3 94 #define DR_LEN_MASK 0xC /* Two bits specify data length */ 95 #define DR_LEN_1 0x0 /* Settings for data length */ 96 #define DR_LEN_2 0x4 97 #define DR_LEN_4 0xC 98 99 #ifdef __cplusplus 100 } 101 #endif 102 103 #endif /* _SYS_DEBUGREG_H */ 104