/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1992 NeXT Computer, Inc. * * Intel386 Family: Processor exception frame. * * HISTORY * * 31 August 1992 David E. Bohman at NeXT * Added v86 mode stuff. * * 8 June 1992 David E. Bohman at NeXT * Changed name of write field in err_code_t * which collided with write() in shlib. * * 30 March 1992 David E. Bohman at NeXT * Created. */ /* * Format of the error code * generated by the hardware * for certain exceptions. */ typedef union err_code { struct err_code_normal { unsigned int ext :1, tbl :2, #define ERR_GDT 0 #define ERR_IDT 1 #define ERR_LDT 2 index :13, :16; } normal; struct err_code_pgfault { unsigned int prot :1, wrtflt :1, user :1, :29; } pgfault; } err_code_t; #import <architecture/i386/sel.h> /* * The actual hardware exception frame * is variable in size. An error code is * only pushed for certain exceptions. * Previous stack information is only * pushed for exceptions that cause a * change in privilege level. The dpl * field of the saved CS selector can be * used to determine whether this is the * case. If the interrupted task was * executing in v86 mode, then the data * segment registers are also present in * the exception frame (in addition to * previous stack information). This * case can be determined by examining * eflags. */ typedef struct except_frame { err_code_t err; unsigned int eip; sel_t cs; unsigned int :0; unsigned int eflags; unsigned int esp; sel_t ss; unsigned int :0; unsigned short v_es; unsigned int :0; unsigned short v_ds; unsigned int :0; unsigned short v_fs; unsigned int :0; unsigned short v_gs; unsigned int :0; } except_frame_t; /* * Values in eflags. */ #define EFL_CF 0x00001 #define EFL_PF 0x00004 #define EFL_AF 0x00010 #define EFL_ZF 0x00040 #define EFL_SF 0x00080 #define EFL_TF 0x00100 #define EFL_IF 0x00200 #define EFL_DF 0x00400 #define EFL_OF 0x00800 #define EFL_IOPL 0x03000 #define EFL_NT 0x04000 #define EFL_RF 0x10000 #define EFL_VM 0x20000 #define EFL_AC 0x40000 #define EFL_CLR 0xfff88028 #define EFL_SET 0x00000002